CN112256085B

CN112256085B - Pressure controller

Info

Publication number: CN112256085B
Application number: CN201910661996.3A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2023-06-20
Anticipated expiration: 2039-07-22
Also published as: CN112256085A

Abstract

The invention discloses a pressure controller, which comprises a pressure sensing part, a transmission part and a micro switch assembly, wherein the pressure sensing part transmits displacement through the transmission part to control the micro switch assembly to act; the pressure controller also comprises a locking part, wherein the locking part can be matched with the transmission part for locking when in a locking position, and the pressure controller also comprises a reset part, the reset part can be switched from an initial position to a reset position under the action of external force, and the locking part can be unlocked at the reset position to be positioned in an unlocking position; the installation position of the reset part is also provided with a limiting part, the reset part is provided with a reset maintaining piece, when the reset part is at the reset position, the reset part can rotate to enable the reset maintaining piece to be matched with the limiting part, the reset part is limited to return to the initial position, and the reset part is maintained at the reset position. The pressure controller has the advantages of manual reset and automatic reset. In addition, the reset retainer is arranged on the reset part, and can realize the switching of automatic and manual reset modes by rotating at the same time when in reset operation, so that the operation is very convenient, and the reset operation is also more reliable.

Description

Pressure controller

Technical Field

The invention relates to the technical field of pressure regulation and control, in particular to a pressure controller.

Background

The pressure controller is used as a safety protection and control part of an air conditioner and a refrigerating system, can prevent the air inlet pressure from being too low or the air outlet pressure from being too high, can also be used for an air-cooled condenser and is used for controlling the starting and stopping of a compressor or a fan.

At present, the reset mode of the pressure controller comprises an automatic reset mode and a manual reset mode, the automatic reset pressure controller can automatically reset the micro switch when the system pressure is normal, the system continues to operate, the manual reset pressure controller can not automatically reset to an initial position when the pressure returns to a normal level after the circuit is cut off due to abnormal system pressure, the system continues to maintain a cut-off state, normal operation can be resumed after manual reset is needed, and the purpose is that the reason and the state of the abnormal system pressure need to be manually determined before normal operation, and the secondary fault is avoided.

Disclosure of Invention

The invention provides a pressure controller, which comprises a pressure sensing part, a transmission part and a micro switch assembly, wherein the pressure sensing part transmits displacement through the transmission part to control the micro switch assembly to act; the pressure controller also comprises a locking part which can be matched and locked with the transmission part when in a locking position,

the device also comprises a reset part, wherein the reset part can be switched from an initial position to a reset position under the action of external force, and the locking part can be unlocked at the reset position to be positioned in an unlocking position;

the installation position of the reset part is also provided with a limiting part, the reset part is provided with a reset maintaining piece, when the reset part is in the reset position, the reset part can rotate to enable the reset maintaining piece to be matched with the limiting part, the reset part is limited to return to the initial position, and the reset part is maintained at the reset position.

Optionally, the pressure controller includes a housing provided with a mounting hole, and the reset portion is inserted into the mounting hole and is capable of axially reciprocating along the mounting hole to switch between the initial position and the reset position;

the limiting part is a limiting groove formed in the shell, the reset retainer is a limiting block protruding out of the peripheral wall of the reset part, the reset part can rotate in a certain angle in the mounting hole at the reset position, the limiting block is clamped into the limiting groove to limit the reset part to move axially, the reset part is maintained at the reset position and reversely rotates, the limiting block is withdrawn from the limiting groove, and the reset part can return to the initial position.

Optionally, the device further comprises a restoring piece, wherein the restoring piece provides restoring force for restoring the restoring part to the initial position; the shell is further provided with a rotating groove, the height of the rotating groove is smaller than that of the limiting groove, and when the reset part rotates from the direction capable of freely reciprocating, the limiting block firstly slides into the rotating groove and then is clamped into the limiting groove, and is at least partially misplaced from the rotating groove in the height direction under the action of the restoring force of the restoring piece.

Optionally, the housing is further provided with an anti-rotation member having a free position in which the anti-rotation member prevents the reset portion from rotating and an anti-rotation position in which the anti-rotation member does not interfere with the rotation of the reset portion.

Optionally, the anti-rotation member includes an anti-rotation spring and an anti-rotation post, the housing is provided with a plug hole, the anti-rotation post penetrates through the plug hole, radial dimensions of two ends of the anti-rotation post are respectively larger than those of two ends of the plug hole, so as to limit the anti-rotation post to be separated from the plug hole, and the anti-rotation spring is arranged between one end of the anti-rotation post and the housing;

the reset portion is equipped with the handle, and external force presses prevent the steering column, prevent the steering column with the handle staggers along the direction of height, reset portion can rotate, and external force withdraws, reset spring resets prevent the steering column, the handle with prevent that the steering column is contradicted and is prevented reset portion is rotatory.

Optionally, the reset portion includes a pressing end and a movable column connected to each other, the pressing end extends out of the outer end of the mounting hole, and the movable column penetrates through the mounting hole; the pressure controller also comprises a return piece, the pressing end is pressed, the restoring force of the return piece is overcome, the end part of the movable column abuts against the locking part to unlock the locking part, or the pressing external force is removed, the return piece drives the resetting part to move outwards, the end part of the movable column is separated from the locking part, and the locking part is in a locking position.

Optionally, the locking portion with one is equipped with spacing hole, and one is equipped with spacing arch, the locking portion is in the locking position, just when pressure sensing portion received pressure fluctuation abnormal signal, the spacing arch of transmission portion can block into in the spacing hole, locking portion locking transmission portion, when reset portion releases the locking, spacing arch breaks away from spacing hole.

Optionally, the spacing arch is located the drive portion, the spacing hole is located the locking plate, the edge in spacing hole is equipped with the guide slope, in order to guide spacing protruding card goes into spacing hole.

Optionally, the locking portion includes shell fragment and locking plate, the middle part of shell fragment can be located around the inside backup pad rotation of casing, the locking plate is equipped with spacing hole or spacing arch, reset portion when the movable column supports the one end of shell fragment, the other end lifting of shell fragment the locking plate drives the locking plate is kept away from the drive portion, in order to be in the unblock position.

Optionally, the periphery wall of the movable column is provided with a pawl, the movable column is provided with a deformation groove extending along the length direction, the movable column is inserted into the mounting hole, the deformation groove contracts, the movable column penetrates out of the mounting hole, the deformation groove expands and resets, and the pawl limits the movable column to reversely separate from the mounting hole

In this scheme, the part of unlocking the portion locking is reset portion, and reset portion can switch to reset position from initial position under the exogenic action, in reset position, reset portion can unlock the locking portion, makes it be located unlocking position.

In addition, the installation position of the reset part is also provided with a limiting part, the reset part is provided with a reset retainer, when the reset part is in the reset position, the reset part can act to enable the reset retainer to be matched with the limiting part, the reset part is limited to return to the initial position and is kept in the reset position, the locking part is always in an unlocking position, so that the automatic reset mode is switched, the reset part can be reversely operated to enable the reset retainer to be in unlocking with the limiting part, the reset part can return to the initial position after unlocking the locking part, and the locking part is in the locking position and is in the manual switching mode. That is, the reset unit performs the functions of resetting, automatic and manual mode switching by its own operation. Therefore, the pressure controller in the scheme has the advantages of being capable of being switched into the manual reset mode and the automatic reset mode, and therefore the pressure controller has the advantages of being capable of being manually reset and automatically reset. In addition, the reset retainer is arranged on the reset part, so that when an external force is applied to the reset part to perform reset operation, the reset retainer can be rotated simultaneously to realize the switching between an automatic reset mode and a manual reset mode, the operation is very convenient, and the reset operation of the reset part is also not interfered by the rotation operation per se, so that the reset operation is also more reliable.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a pressure controller according to the present invention, which is an axial sectional view of the pressure controller;

FIG. 2-1 is a view from A-A in FIG. 1;

FIG. 2-2 is an enlarged partial schematic view of the portion I of FIG. 2-1;

FIG. 3 is a schematic perspective view of the transmission part in FIG. 1;

FIG. 4-1 is a schematic view of the inside of the micro switch of FIG. 1;

FIG. 4-2 is an enlarged view of the position of the U-shaped piece in FIG. 4-1 engaged with the action reed;

fig. 4-3 are schematic diagrams of the action reed in a first configuration;

figures 4-4 are schematic illustrations of a transition of the actuation reed from the first configuration to the second configuration;

figures 4-5 are schematic illustrations of the action reed in a second configuration;

FIG. 5-1 is a schematic view of the engaged position of the locking portion and the driving portion of FIG. 1;

FIG. 5-2 is an enlarged partial schematic view of the position II of FIG. 5-1;

FIG. 6 is a schematic view of a locking piece of the locking portion of FIG. 5, wherein the limiting hole is formed in the locking piece;

fig. 7 is a schematic perspective view of the reset portion in fig. 1;

FIG. 8 is an axial cross-sectional view of the reset portion of FIG. 7;

FIG. 9-1 is a schematic illustration of the mounting seat position of the pressure controller housing top mounting reset portion, not shown;

FIG. 9-2 is an enlarged partial schematic view of the III position of FIG. 9-1;

FIG. 10-1 is a perspective view of the mount location of FIG. 9-1;

FIG. 10-2 is a schematic view of the mount of FIG. 10-1;

FIG. 11 is a schematic structural view of a second embodiment of a pressure controller according to the present invention, which is an axial cross-sectional view of the pressure controller;

FIG. 12 is a perspective view of the reset portion mounting position of FIG. 11;

FIG. 13 is a top view of FIG. 12;

fig. 14 is a perspective view of the reset portion of fig. 11;

FIG. 15 is a bottom view of FIG. 14;

FIG. 16 is a B-B view of FIG. 15;

fig. 17 is a perspective view of the anti-rotation screw of fig. 11.

The reference numerals in fig. 1-17 are illustrated as follows:

1 joint, 1-1 medium channel, 1-2 corrugated pipe pressure sensing component, 2-1 inner shell and 2-2 outer shell;

a 3 lever plate, a 3-1V-shaped groove and a 4 spring;

a 5 transmission part, a 5-2 transmission block, a 5-3 limit bulge and a 5-4 rotary round angle;

6-a reset spring and a 7-bracket;

8 shrapnel, 8-1 first end, 8-2 fulcrum and 8-3 second end;

9. 9' mounting base; 9-1, 9' -1 movable grooves, 9-2 rotary grooves; 9-3, 9'-3 limit grooves and 9-4, 9' -4 mounting holes;

10. a 10' -reset unit; 10-1, 10' -1 pressing ends; 10-2, 10' -2 movable columns; 10-3, 10' -3 handles; 10-4, 10' -4 limited blocks; 10-5, 10' -5 inverted teeth; 10-6, 10' -6 deformation grooves; 10-7, 10'-7 movable cavities and 10' -8 limit ribs;

11-locking plate, 11-1 limit hole and 11-2 guide inclined plane;

12-supporting plates;

the micro-switch comprises a 13-micro-switch assembly, a 13-1 switch base, a 13-2 second fixed terminal assembly, a 13-3 first fixed terminal assembly, a 13-4 second fixed contact, a 13-5 first fixed contact, a 13-6 common action contact, a 13-7 inclined hole matrix, a 13-8 adjusting screw, a 13-9 riveting piece, a 13-10 common terminal assembly, a 13-11 wiring screw assembly, a 13-12 action reed, a 13-13U-shaped piece and a 13-14U-shaped piece supporting groove;

14 anti-rotation screws, 14-1 polish rod sections, 14-2 thread sections and 15 anti-rotation springs.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The pressure controller comprises a pressure sensing part, a transmission part and a micro switch, wherein the pressure sensing part can convert an abnormal pressure signal of a medium into an instantaneous displacement signal, and the transmission part transmits the displacement to the micro switch and converts the displacement into an action signal of the micro switch so as to realize automatic control. When the pressure returns to the normal range, the micro switch can be manually or automatically returned to the original position, and the system continues to operate.

The pressure controller further comprises a locking part, when the locking part is in a locking position, and when the pressure sensing part detects pressure abnormality, the transmission part can act to drive the micro switch to act, at the moment, the locking part at the locking position can lock the transmission part at the position, even if the pressure returns to be normal, the micro switch can not reset, the locking of the locking part to the transmission part can be manually released, the locking part is in an unlocking position, the transmission part can return to act, and accordingly, the micro switch can reset. When the automatic reset is needed, the locking part can be always in the unlocking position, so that even if the pressure is abnormal, the transmission part can not be locked when the pressure returns to normal, the transmission part is automatically reset, and the micro switch is also automatically reset.

In addition, the installation position of the reset part is also provided with a limiting part, the reset part is provided with a reset retainer, when the reset part is in the reset position, the reset part can act to enable the reset retainer to be matched with the limiting part, the reset part is limited to return to the initial position and is kept in the reset position, the locking part is always in an unlocking position, so that the automatic reset mode is switched, the reset part can be reversely operated to enable the reset retainer to be in unlocking with the limiting part, the reset part can return to the initial position after unlocking the locking part, and the locking part is in the locking position and is in the manual switching mode. That is, the reset unit performs the functions of resetting, automatic and manual mode switching by its own operation.

The specific structure of the reset portion and the manner of cooperation with the limiting portion can be understood with reference to the following embodiments.

Example 1

Fig. 1 is a schematic structural view of a first embodiment of a pressure controller according to the present invention, and is an axial cross-sectional view of the pressure controller.

As shown in fig. 1, the pressure controller includes a housing, in this embodiment, the housing includes an outer housing 2-2 and an inner housing 2-1, and components are mounted in the inner housing 2-1, and the outer housing 2-2 covers the inner housing 2-1 to perform a further protection function. The pressure sensing part, in particular to the corrugated pipe pressure sensing part 1-2, is arranged in the shell, the lever plate 3 and the spring 4 are arranged above the pressure sensing part, and the transmission part 5 is arranged above the lever plate 3. In addition, the bottom of the shell is provided with a joint 1, a medium channel 1-1 is arranged in the joint 1, the pressure of the medium is sensed by the corrugated pipe pressure sensing component 1-2 through the medium channel 1-1, the corrugated pipe pressure sensing component 1-2 senses the pressure and transmits displacement, an instantaneous action displacement signal is generated through the lever plate 3 to the transmission part 5, and the transmission part 5 acts along with the instantaneous action displacement signal and is further transmitted to the micro switch component 13 so as to switch circuits.

As shown in fig. 2-1, 2-2, 3, fig. 2-1 is a view from A-A in fig. 1; FIG. 2-2 is an enlarged partial schematic view of the portion I of FIG. 2-1; fig. 3 is a schematic perspective view of the transmission part 5 in fig. 1.

The transmission part 5 specifically comprises a transmission block 5-2, the transmission block 5-2 is matched with the micro-switch component 13, specifically, a motion reed 13-12 for applying force to the micro-switch component 13 is arranged at the bottom of the transmission part 5, as shown in fig. 3, a rotating round corner 5-4 is arranged at the bottom of the transmission part 5 and is matched with the lever plate 3, as shown in fig. 2-1, a V-shaped groove 3-1 is arranged on the lever plate 3, the rotating round corner 5-4 at the bottom of the transmission part 5 is clamped on the V-shaped groove 3-1, and when the pressure sensing part detects that the pressure fluctuation is abnormal, the rotating round corner 5-4 of the transmission part 5 rotates at the V-shaped groove 3-1 for a certain displacement, so that the transmission block 5-2 can act on the micro-switch component 13.

As shown in fig. 4-1, fig. 4-1 is a schematic view of the inside of the micro switch assembly 13 in fig. 1.

The micro-switch assembly 13 comprises a switch base 13-1, a first fixed terminal assembly 13-3 (fixed end B), a second fixed terminal assembly 13-2 (fixed end C) and a public terminal assembly 13-10 (public end A) are arranged in the switch base 13-1, the terminal assemblies are all provided with a wiring screw assembly 13-11, in addition, the first fixed contact 13-5, the second fixed contact 13-4 and the public action contact 13-6 are correspondingly arranged on the first terminal assembly, the second terminal assembly and the public terminal assembly, an inclined hole base 13-7, an adjusting screw 13-8, a riveting piece 13-9, an action reed 13-12, a U-shaped piece 13-13 and a U-shaped piece supporting groove 13-14 are also arranged in the switch base 13-1. The U-shaped sheet 13-13 is compressively disposed between the U-shaped sheet supporting groove 13-14 and the action reed 13-12.

With continued reference to FIGS. 4-2, 4-3, 4-4, and 4-5, FIG. 4-2 is an enlarged view of the mating position of U-shaped tab 13-13 and action reed 13-12 of FIG. 4-1; fig. 4-3 is a schematic diagram of action reed 13-12 in a first configuration; figures 4-4 are schematic illustrations of a transition of action reed 13-12 from a first configuration to a second configuration; figures 4-5 are schematic illustrations of actuation reed 13-12 in a second configuration.

The transmission block 5-2 of the transmission part 5 acts on the action reed 13-12 to push the action reed 13-12 to act in the opposite direction, namely the direction of the second fixed contact 13-5, when the critical position is reached, a reverse instant action displacement is generated, so that the AB end is rapidly switched on, the AC end is switched off, the transmission part 5 subsequently displaces to the B end, the reverse acting force enables the AB end to be always switched on, and the system returns to normal.

As shown in fig. 3, the rotating round corner 5-4 is arranged at the bottom of the transmission part 5, the top of the transmission part 5 is also provided with a limiting protrusion 5-3, and the limiting protrusion 5-3 is used for being matched with a limiting hole 11-1 on the locking part.

5-1, 5-2 and 6, FIG. 5-1 is a schematic view showing the engaged position of the locking portion and the transmission portion 5 in FIG. 1; FIG. 5-2 is an enlarged partial schematic view of the position II of FIG. 5-1; fig. 6 is a schematic view of a locking piece 11 of the locking portion in fig. 5, and a limiting hole 11-1 is provided in the locking piece 11.

In this embodiment, the locking portion specifically includes a locking plate 11 and a spring plate 8, where the spring plate 8 has a first end 8-1 and a second end 8-3, the first end 8-1 is supported on a return member, specifically, a return spring 6 shown in fig. 5-2 and disposed in the housing, the return spring 6 is mounted on a bracket 7 in the housing, the second end 8-3 of the spring plate 8 is in contact engagement with the locking plate 11, specifically, the second end 8-3 is below the locking plate 11, the transmission portion 5 is also below the locking plate 11, the middle of the spring plate 8 is a fulcrum 8-2, the fulcrum 8-2 is in contact engagement with a support plate 12 (shown in fig. 1) in the housing, the spring plate 8 is rotatable about the fulcrum 8-2, when the spring plate rotates counterclockwise about the fulcrum 8-2, the second end 8-3 is tilted upward to urge the locking plate 11 away from the transmission portion 5, when the second end 8-3 rotates clockwise about the fulcrum 8-2, and the locking plate 11 is located near the transmission portion 5. In fig. 1, a supporting plate 12 is installed at the top of the inner shell 2-1, the elastic sheet 8 is bent, and a bending part at the middle of the elastic sheet is contacted with the supporting plate 12 and serves as a rotating supporting point 8-2.

As shown in fig. 5-2, the locking part is at a locking position, namely, a position relatively close to the transmission part 5, wherein, as shown in fig. 6, a locking plate 11 of the locking part is provided with a limiting hole 11-1 and a guiding inclined plane 11-2, when the pressure sensing part detects abnormal pressure fluctuation, a limiting protrusion 5-3 arranged at the top of the transmission part can move upwards for a certain distance when the transmission part 5 acts, and slide into the limiting hole 11-1 under the guiding action of the guiding inclined plane 11-2 to form up-down clamping connection with the limiting hole 11-1, so that the transmission part 5 can not act any more, and is in a locking state, and even if the pressure returns to normal, the micro switch assembly 13 is still in a current state and can not be reset. At this time, the reset needs to be manually performed.

In this embodiment, the reset portion 10 is the reset button shown in fig. 1, please refer to fig. 7 and 8, and fig. 7 is a schematic perspective view of the reset portion in fig. 1; fig. 8 is an axial cross-sectional view of the reset portion of fig. 7.

In fig. 1, a mounting hole 9-4 is provided in the housing, a reset portion 10 is inserted into the mounting hole 9-4, the reset portion 10 specifically includes a pressing end 10-1 and a movable column 10-2 which are connected, the movable column 10-2 can penetrate through the mounting hole 9-4, the pressing end 10-1 is larger than the mounting hole 9-4 in size, and is located at the outer end of the mounting hole 9-4 for pressing operation. As shown in fig. 5-2, the first end 8-1 of the elastic piece 8 is located between the bottom of the movable post 10-2 and the return spring 6 as a return piece, when the return portion 10 is located at the initial position, the movable post 10-2 does not press the first end 8-1 of the elastic piece 8, the return spring 6 provides an upward return force, so that the first end 8-1 of the elastic piece 8 has a tendency to tilt up, and the second end 8-3 has a tendency to fall and does not lift the locking piece 11, so that the locking piece 11 is close to the transmission portion 5 and is located at a locking position capable of being matched with the limit protrusion 5-3 of the transmission portion 5; when the pressing end 10-1 of the reset portion 10 is pressed, the reset portion 10 is at a reset position, the movable column 10-2 overcomes the restoring force of the reset spring 6, the first end 8-1 of the elastic sheet 8 is pressed down, the second end 8-3 is at an upturned position, the locking sheet 11 is lifted up, the locking position is separated, the locking portion is at an unlocking position at the moment, the limiting protrusion 5-3 is separated from the limiting hole 11-1, the transmission portion 5 is unlocked, and when the pressure returns to be normal, the micro switch assembly 13 can return to the original position.

Obviously, to perform automatic resetting, the movable column 10-2 needs to be kept at the resetting position, that is, kept at the state of pressing down the elastic sheet 8 to overcome the restoring force of the reset spring 6, so that the locking sheet 11 is always at the lifted unlocking position, and no matter whether the pressure fluctuation is abnormal or not, the limit protrusion 5-3 of the transmission part 5 cannot be clamped into the limit hole 11-1 of the locking sheet 11 and is locked by the locking sheet 11.

5-2 and 7, and with reference to FIGS. 9-1, 9-2 and 10, FIG. 9-1 is a schematic view of a position of the mounting base 9 of the reset portion 10 mounted on the top of the housing of the pressure controller, and the reset portion 10 is not shown; FIG. 9-2 is an enlarged partial schematic view of the III position of FIG. 9-1; FIG. 10-1 is a perspective view of the mounting block 9 of FIG. 9-1; fig. 10-2 is a schematic view of the mounting base 9 of fig. 10-1.

As shown in fig. 9-1, the outer end surface of the top of the shell is provided with a convex mounting seat 9, the mounting hole 9-4 penetrates through the mounting seat 9 and the top of the shell, and as shown in fig. 9-2, the outer peripheral wall of the mounting seat 9 is provided with a movable groove 9-1, a rotary groove 9-2 and a limiting groove 9-3 which are connected in sequence. As shown in fig. 7, the pressing end 10-1 of the reset portion 10 is provided with a limiting block 10-4, and the reset holder provided by the reset portion 10 is specifically referred to as a limiting block 10-4, and the limiting portion is specifically referred to as a limiting groove 9-3.

The height relation of the movable groove 9-1, the rotary groove 9-2 and the limit groove 9-3 is that the movable groove 9-1> and the limit groove 9-3> are respectively and fixedly connected with the rotary groove 9-2, the rotary groove 9-2 is corresponding to the bottom of the movable groove 9-1 in height, and the bottom of the limit groove 9-3 is approximately flush with the bottom of the rotary groove 9-2. When the movable column 10-2 moves in the axial direction (up-down direction in fig. 9-2) in the mounting hole 9-4, the stopper 10-4 is located in the movable groove 9-1, does not interfere with the up-down movement of the movable column 10-2, and the reset portion 10 is in a manual reset mode, and after the reset portion 10 presses the unlocking locking portion, the reset portion 10 can return to the initial position, and the locking portion is in a locking position capable of being locked with the transmission portion 5 again.

When the automatic reset mode is needed to be switched, when the reset part 10 is at the reset position (the movable column 10-2 props against the elastic sheet 8), namely the reset part 10 is pressed, the reset part 10 is rotated, the limiting block 10-4 of the reset part is rotated into the rotating groove 9-2 to continue rotating, the rotating groove 9-2 slides into the limiting groove 9-3, the height of the limiting groove 9-3 is lower than that of the movable groove 9-1, interference is formed on the upward movement of the limiting block 10-4, and the reset part 10 is prevented from axially returning to the initial position, so that the reset part 10 is kept at the reset position, and the locking plate 11 is always in the unlocking position and is switched to the automatic reset mode.

In this embodiment, the rotating groove 9-2 is provided, and it is known that when the reset portion 10 is pressed to be at the height of the reset position, if the pressing external force is removed, under the restoring action of the restoring member, the movable post 10-2 will drive the whole reset portion 10 to bounce upwards to return to the initial position, and the height of the limiting groove 9-3 provided herein is slightly higher than that of the rotating groove 9-2, so that after the limiting block 10-4 is clamped into the limiting groove 9-3, the external force is removed, and under the restoring force, the limiting block 10-4 slightly moves upwards and is at least partially staggered with the rotating groove 9-2 in the height direction, so that the limiting block 10-4 cannot be turned back into the movable groove 9-1 along the limiting groove 9-2, thereby more reliably maintaining the reset position and avoiding the switching failure. It will be appreciated that the rotation groove 9-2 is not provided, and the limiting block 10-4 can directly rotate from the movable groove 9-1 into the limiting groove 9-3.

As shown in fig. 7 and 8, the pressing end 10-1 of the reset portion 10 is cap-shaped and includes a top and an annular outer periphery, the movable column 10-2 extends downward from the inner wall surface of the top, a movable cavity 10-7 is formed between the annular outer periphery and the movable column 10-2, and when the reset portion 10 moves up and down, the peripheral wall of the mounting seat 9 is in the movable cavity 10-7, and the two displace relatively up and down. The stopper 10-4 extends inward from the inner wall of the annular outer periphery to be located in the movable groove 9-1, the stopper groove 9-3 or the rotation groove 9-2 of the outer periphery of the mounting seat 9. In this embodiment, the pressing end 10-1 is further provided with a radially protruding handle 10-3, so that the reset portion 10 is conveniently moved to rotate, the limiting block 10-4 and the handle 10-3 may be of an integral structure, a notch is formed in the annular periphery of the pressing end 10-1, the handle 10-3 is mounted at the notch position, a portion extending to the outer side is available for operation, and a portion extending to the inner side is the limiting block 10-4.

With continued reference to fig. 7 and 8, in this embodiment, the movable post 10-2 of the reset portion 10 is provided with a deformation groove 10-6 extending along the length direction, when the movable post 10-2 is inserted into the mounting hole 9-4, the deformation groove 10-6 is contracted, and after the movable post 10-2 passes through the mounting hole 9-4 and enters the inside of the housing, the deformation groove 10-6 is expanded and reset. As shown in FIG. 8, the outer peripheral wall of the movable column 10-2 is further provided with a pawl 10-5, and the pawl 10-5 can restrict the movable column 10-2 from reversely disengaging from the mounting hole 9-4. Both the end of the movable post 10-2 and the inverted tooth 10-5 have guide slopes 11-2 to guide the insertion of the movable post 10-2 into the mounting hole 9-4.

The deformation groove 10-6 is of a through groove structure, penetrates through the bottom of the movable column 10-2 and penetrates through two sides of the movable column 10-2, and is equivalent to dividing a part of the movable column 10-2 into two flaps, so that the deformation groove has certain elasticity and can be contracted inwards or expanded outwards. It is understood that the deformation groove 10-6 is not limited to the linear groove shown in fig. 8, and for example, a cross groove may be used to divide a portion of the movable column 10-2 above the bottom by a certain distance into four segments, or the deformation groove 10-6 may be a linear groove with three ends connected to each other to divide the movable column 10-2 into three segments, and the like, which is not limited herein.

The movable column 10-2 provided with the deformation groove 10-6 is provided here to facilitate the assembly of the reset portion 10 and the housing, and it is understood that the reset portion 10 is not limited to this structure as long as it can be inserted into the mounting hole 9-4 of the housing to perform the reset operation. For example, the movable column 10-2 of the reset portion 10 may have a threaded section at the lower portion, a light column section with a radial dimension smaller than that of the threaded section at the upper portion, and the mounting hole 9-4 is a matched threaded hole, so that after the movable column 10-2 is screwed in, the threaded section passes through the mounting hole 9-4, and the movable column 10-2 will not be separated from the mounting hole 9-4 upward.

In this embodiment, the limiting groove 9-3 is provided on the outer periphery of the mounting base 9, and the limiting block 10-4 is provided on the inner wall of the annular outer periphery of the pressing end 10-1. For example, the movable groove 9-1, the rotary groove 9-2 and the limit groove 9-3 can be arranged on the inner periphery of the mounting seat 9, and the limit block 10-4 can be arranged on the outer peripheral wall of the movable column 10-2, however, the limit block 10-4 is arranged on the inner wall of the annular outer periphery of the pressing end 10-1, so that the movable column 10-2 and the mounting hole 9-4 can be better matched, and the action is more stable and reliable. In addition, the limiting part is not limited to the limiting groove 9-3, for example, the reset maintaining member may be a limiting block provided on the movable column 10-2, and the inner wall of the mounting hole 9-4 is provided with a protrusion as the limiting part, when the reset part 10 is at the reset position and rotates by a certain angle, the protrusion is located above the limiting block, and the protrusion is limited to move upwards, so that the reset part 10 is maintained at the reset position.

It should be noted that, in this embodiment, the locking portion provided includes the spring plate 8 and the locking plate 11, the locking plate 11 is rotated by the spring plate 8 to switch the lifting or dropping position, so as to switch the unlocking position and the locking position, specifically, the unlocking position and the locking position are realized by moving the reset portion 10 in the axial direction, so that the reset portion 10 is pressed down to the reset position or the reset portion 10 returns to the initial position, and accordingly, the reset portion 10 is designed to be capable of moving in the axial direction to perform the reset operation and rotating to keep the reset position. The locking part can also only comprise the spring plate 8, the second end 8-3 of the spring plate 8 realizes the function of the locking plate 11, and of course, the independent locking plate 11 is matched with the transmission part 5, so that the lifting and falling actions of the locking plate 11 can be distinguished from the actions of the spring plate 8, the actions of the spring plate 8 depend on the pressing operation of the reset part 10, the pressing force of the pressing operation is generally larger and is distinguished from the actions of the locking plate 11, and the transmission part 5 can be kept to be relatively fine in transmission action.

It will be appreciated that the operation of the reset portion 10 is not limited to the above-mentioned scheme, that is, the reset operation of the reset portion 10 is not limited to the axial movement along the mounting hole 9-4, for example, the reset operation of the reset portion 10 may be the horizontal pushing and pulling operation when the view angle is taken as fig. 1 according to the different structures of the locking portion, which is not limited in this scheme.

Therefore, the pressure controller in the scheme has the advantages of being capable of being switched into the manual reset mode and the automatic reset mode, and therefore the pressure controller has the advantages of being capable of being manually reset and automatically reset. In addition, in this scheme, locate the reset holder and reset portion 10 itself, like this, when applying external force to reset portion 10 and carrying out reset operation, rotate simultaneously and can realize automatic reset mode and manual reset mode's switching, the operation is very convenient, and rotatory action itself does not interfere reset action of reset portion 10 yet, so reset operation is also comparatively reliable.

Example 2

The embodiment is basically the same as embodiment 1, and the locking part, the transmission part, the micro switch and the like arranged in the shell are completely the same, and the resetting mode of the resetting part is the same, but the design of the pressing end of the resetting part is slightly changed, and the anti-rotation part is additionally arranged to prevent misoperation of the resetting part and the misoperation of the resetting part, so that the automatic resetting or the switching of the manual resetting mode is performed.

Referring to fig. 11-17, fig. 11 is a schematic structural view of a second embodiment of a pressure controller according to the present invention, and is an axial cross-sectional view of the pressure controller; FIG. 12 is a perspective view of the reset portion mounting position of FIG. 11; FIG. 13 is a top view of FIG. 12; fig. 14 is a perspective view of the reset portion of fig. 11; FIG. 15 is a bottom view of FIG. 14; FIG. 16 is a B-B view of FIG. 15; fig. 17 is a perspective view of the anti-rotation screw of fig. 11.

In this embodiment, the mounting seat 9' on the outer end surface of the top of the housing is also provided with a limiting groove 9' -3 and a movable groove 9' -1, the rotating groove 9-2 in embodiment 1 is not provided, and the limiting block 10' -4 of the pressing end 10' -1 can directly rotate from the movable groove 9' -1 to slide into the limiting groove 9' -3. In addition, as shown in fig. 17, an anti-rotation screw 14 is provided, the anti-rotation screw 14 includes a nut and a stud, the stud specifically includes a polish rod section 14-1 and a threaded section 14-2 located at the end, the housing is provided with a through-hole 9' -5 penetrating inside and outside, the through-hole 9' -5 is a threaded hole, the threaded section 14-2 of the anti-rotation screw 14 is screwed into the through-hole 9' -5, after the threaded section 14-2 integrally passes through the through-hole 9' -5, the polish rod section 14-1 is inserted into the through-hole 9' -5 and can move in the through-hole 9' -5 along the axial direction, and then the anti-rotation screw 14 cannot be separated from the through-hole 9' -5 based on the nut and the threaded section 14-2. In addition, an anti-rotation spring 15 is further arranged, the anti-rotation spring 15 is arranged between the nut and the top outer end surface of the shell, and when no external force acts on the anti-rotation spring 15, the anti-rotation spring 15 is in a precompressed or free state, and at the moment, the anti-rotation screw 14 protrudes out of the shell for a certain distance.

As shown in fig. 11 and 13, the pressing end 10'-1 of the reset portion 10' is also provided with a handle 10'-3, and the rotation preventing screw 14 is located at one side of the handle 10' -3, and when the reset portion 10 'rotates to one side of the rotation preventing screw 14 and is about to enter the limit groove 9' -3, the rotation preventing screw 14 collides with the handle 10'-3 to prevent the handle 10' -3 from rotating and prevent the stopper 10'-4 from entering the limit groove 9' -3, thereby preventing the manual reset mode from being switched to the automatic reset mode. If the limiting block 10' -4 is required to be capable of being rotated into the limiting groove 9' -3, the rotation preventing screw 14 is required to be pressed simultaneously, so that the rotation preventing screw 14 and the handle 10' -3 are staggered in the height direction, then the handle 10' -3 can drive the reset part 10' to freely rotate, the limiting block 10' -4 rotates to enter the limiting groove 9' -3, the matching effect of the limiting groove 9' -3 and the limiting block 10' -4 can be understood by referring to the embodiment 1, and the automatic reset mode is switched. Similarly, if the current state is the automatic reset mode, the handle 10' -3 can drive the reset portion 10' to rotate only by pressing the rotation preventing screw 14, and the limiting block 10' -4 is separated from the limiting groove 9' -3 and enters the movable groove 9' -1, so that the manual reset mode is switched. It can be seen that the provision of the rotation preventing screw 14 prevents erroneous operation and also prevents the switching failure after switching to the corresponding mode, so the rotation groove 9-2 is not provided in embodiment 2.

In addition, as shown in fig. 14, the inner wall of the annular outer periphery of the pressing end 10'-1 is provided with a limiting rib 10' -8 in addition to the limiting block 10'-4, the limiting rib 10' -8 and the limiting block 10'-4 are arranged in parallel along the circumferential direction, the movable groove 9' -1 arranged on the outer periphery of the mounting seat 9 'can accommodate the limiting rib 10' -8 and the limiting block 10'-4, the limiting rib 10' -8 and the limiting block 10'-4 move up and down in the movable groove 9' -1, and after the limiting block 10'-4 rotates to enter the limiting groove 9' -3, the limiting rib 10'-8 is still positioned in the movable groove 9' -1. It will be appreciated that in the embodiment 1, the rotation preventing screw 14 may be provided. The length of the stopper rib 10'-8 may be substantially equal to the length of the pressing end 10' -1 of the reset portion 10', so that the guiding property is better when the movable groove 9' -1 moves, and the length of the stopper 10'-4 may be substantially equal to the height of the stopper groove 9' -3. It should be noted that in embodiment 1, the stopper ribs 10' -8 may be provided.

In embodiment 2, by providing the rotation preventing screw 14, erroneous operation is prevented, and the stability of the reset mode is maintained. Obviously, the anti-rotation member is not limited to the above-mentioned combination structure of the anti-rotation spring 15 and the anti-rotation screw 14, for example, the anti-rotation member may include an anti-rotation post and a torsion spring, the anti-rotation post may be always level with the handle 10' -3, and is in a state of interfering with the rotation of the handle 10' -3 under the action of the torsion spring, the external force pushes the anti-rotation post to leave the position of the handle 10' -3, and after the rotation of the handle 10' -3 is completed, it is also possible to reset the anti-rotation post and interfere with the reset of the handle 10' -3 again. The above-mentioned anti-rotation screw 14 and anti-rotation spring 15 are simpler in structural arrangement and convenient in operation. The anti-rotation screw 14 is designed to be a polish rod section 14-1 and a thread section 14-2 for easy installation into the insertion hole 9' -7 without being separated from the insertion hole 9' -7, and obviously, the anti-rotation member is not limited to include the anti-rotation screw 14, and a general anti-rotation post may be used, for example, an end cap is installed at the insertion end of the anti-rotation post in the housing after insertion to prevent the anti-rotation post from being separated from the insertion hole 9' -7.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The pressure controller comprises a pressure sensing part, a transmission part and a micro switch assembly, wherein the pressure sensing part transmits displacement through the transmission part to control the micro switch assembly to act; the pressure controller also comprises a locking part which can be matched and locked with the transmission part when in a locking position, and is characterized in that,

the installation position of the reset part is also provided with a limit part, the reset part is provided with a reset maintaining piece, when the reset part is in the reset position, the reset part can rotate to enable the reset maintaining piece to be matched with the limit part, the reset part is limited to return to the initial position, and the reset part is maintained in the reset position;

the pressure controller comprises a shell, wherein the shell is provided with a mounting hole, and the reset part is inserted into the mounting hole and can axially reciprocate along the mounting hole so as to switch between the initial position and the reset position;

2. The pressure controller of claim 1, further comprising a return member that provides a return force for the return portion to return to an initial position; the shell is further provided with a rotating groove, the height of the rotating groove is smaller than that of the limiting groove, and when the reset part rotates from the direction capable of freely reciprocating, the limiting block firstly slides into the rotating groove and then is clamped into the limiting groove, and is at least partially misplaced from the rotating groove in the height direction under the action of the restoring force of the restoring piece.

3. The pressure controller of claim 1, wherein the housing is further provided with an anti-rotation member having a free position in which the anti-rotation member prevents rotation of the reset portion and an anti-rotation position in which the anti-rotation member does not interfere with rotation of the reset portion.

4. A pressure controller according to claim 3, wherein the anti-rotation member comprises an anti-rotation spring and an anti-rotation post, the housing is provided with a plug hole, the anti-rotation post penetrates through the plug hole, the radial dimensions of the two ends of the anti-rotation post are respectively larger than those of the two ends of the plug hole so as to limit the anti-rotation post to be separated from the plug hole, and the anti-rotation spring is arranged between one end of the anti-rotation post and the housing;

the reset portion is equipped with the handle, and external force presses prevent the steering column, prevent the steering column with the handle staggers along the direction of height, reset portion can rotate, and external force withdraws, prevent changeing the spring and reset prevent the steering column, the handle with prevent that the steering column is contradicted and is prevented reset portion is rotatory.

5. The pressure controller of any one of claims 1-4, wherein the reset portion includes a pressing end and a movable post that are connected, the pressing end extending beyond the outer end of the mounting hole, the movable post extending through the mounting hole; the pressure controller also comprises a return piece, the pressing end is pressed, the restoring force of the return piece is overcome, the end part of the movable column abuts against the locking part to unlock the locking part, or the pressing external force is removed, the return piece drives the resetting part to move outwards, the end part of the movable column is separated from the locking part, and the locking part is in a locking position.

6. The pressure controller of claim 5, wherein one of the locking portion and the transmission portion is provided with a limiting hole, the other is provided with a limiting protrusion, the locking portion is in a locking position, when the pressure sensing portion receives a pressure fluctuation abnormal signal, the limiting protrusion of the transmission portion can be clamped into the limiting hole, the locking portion locks the transmission portion, and when the reset portion releases the locking, the limiting protrusion is separated from the limiting hole.

7. The pressure controller of claim 6, wherein the limit protrusion is disposed on the transmission portion, the limit hole is disposed on the locking portion, and a guide slope is disposed at an edge of the limit hole to guide the limit protrusion to be clamped into the limit hole.

8. The pressure controller of claim 6, wherein the locking portion comprises a spring and a locking piece, the middle portion of the spring is rotatable around a supporting plate disposed inside the housing, the locking piece is provided with the limiting hole or the limiting protrusion, and when the movable post of the resetting portion abuts against one end of the spring, the other end of the spring lifts the locking piece to drive the locking piece to be away from the transmission portion so as to be in the unlocking position.

9. The pressure controller of claim 5, wherein the peripheral wall of the movable column is provided with a pawl, the movable column is provided with a deformation groove extending along the length direction, the movable column is inserted into the mounting hole, the deformation groove is contracted, the deformation groove is expanded and reset after the movable column passes through the mounting hole, and the pawl limits the movable column from reversely separating from the mounting hole.