CN216477773U - Extrusion type peristaltic pump - Google Patents

Abstract

The embodiment of this specification discloses a squeezing type peristaltic pump, including: a body, a transmission component, a pressing unit and a limit plate, the limit plate is fixedly connected to the body, the pressing unit and the limit plate A hose is placed therebetween, the pressing unit reciprocates under the driving of the transmission component, and is used for pressing the hose, and the pressing unit includes at least two extrusion parts with different structures. In this solution, a pressing unit is used to press the hose, which reduces the friction force between the hose and the extrusion part, reduces the fatigue damage of the hose, and improves the life of the hose.

Description

A squeeze peristaltic pump

technical field

The present application relates to the technical field of peristaltic pumps, and in particular, to a squeeze-type peristaltic pump.

Background technique

Peristaltic pumps, also known as hose pumps, are used to generate fluid flow in an elastic tubular conduit for fluid delivery. The existing peristaltic pump is usually a rotary peristaltic pump, which has the problems of large wear on the catheter and easy pipeline deviation after long-term use.

Utility model content

In view of this, the embodiment of the present application provides a squeeze-type peristaltic pump, which is used to improve the life of the hose.

In order to solve the above-mentioned technical problems, the embodiments of this specification are implemented as follows:

An extrusion type peristaltic pump provided by the embodiments of this specification includes: a main body, a transmission component, a pressing unit and a limit plate, the limit plate is fixedly connected to the main body, the pressing unit and the limit plate A hose is placed therebetween, the pressing unit reciprocates under the driving of the transmission component, and is used for pressing the hose, and the pressing unit includes at least two extrusion parts with different structures.

Optionally, the pressing unit performs linear reciprocating motion under the driving of the transmission component.

Optionally, the transmission component is an eccentric transmission mechanism or a linear transmission mechanism.

Optionally, the eccentric transmission mechanism includes a coaxial first eccentric component, a second eccentric component and a third eccentric component in sequence, wherein the second eccentric component is an eccentric wheel, the first eccentric component or the third eccentric component. The eccentric parts are cams, and the eccentric angles of the adjacent eccentric parts are different.

Optionally, the eccentric transmission mechanism is a camshaft having a plurality of cams, the camshafts are rotatably arranged on the body, and the phase angles corresponding to the highest peaks of the adjacent cams are different.

Optionally, the pressing unit includes a liquid inlet cut-off block, a working pressure block and a liquid discharge cut-off block arranged in sequence along the axial direction of the hose, and the camshaft sequentially includes a liquid inlet cut-off cam and a squeeze cam along the liquid transmission direction. and discharge cut-off cam, the liquid feed cut-off cam is used to drive the liquid feed cut-off block to reciprocate, the discharge cut-off cam is used to drive the liquid discharge cut-off block to reciprocate, and the squeeze cam is used for reciprocating motion. To drive the working pressure block to do reciprocating motion.

Optionally, the liquid inlet cut-off cam, the squeeze cam and the liquid discharge cut-off cam are mutually independent structures and are all fixed on the main shaft.

Optionally, the liquid inlet cut-off cam, the squeeze cam and the liquid discharge cut-off cam are of an integrated structure.

Optionally, the liquid inlet cut-off block and the liquid discharge cut-off block are clamping blocks.

Optionally, the limiting plate is close to the end face of the hose, and an elastic material is provided at a position corresponding to the clamping block.

Optionally, the working briquetting block includes two or more sub-briquetting blocks, or the liquid inlet cut-off block includes two or more sub-cut blocks, or the liquid discharge cut-off block includes two or more sub-cut blocks piece.

Optionally, there are multiple limit plates, which are respectively set corresponding to the liquid inlet cut-off block, the working pressure block and the liquid discharge cut-off block.

Optionally, the pressing unit swings and reciprocates under the driving of the transmission component.

Optionally, the transmission component is a cam, the pressing unit is a swing lever, one end of the swing lever is hinged on the body, and the other end of the swing lever is driven by the cam to swing and reciprocate. , squeeze the hose periodically.

Optionally, the transmission component and the pressing unit are both rods, and they constitute a link mechanism, and one end of the pressing unit reciprocates under the drive of the transmission component, periodically pressing the soft Tube.

Optionally, the transmission component and the pressing unit are arranged inside the main body, a pressing block movable groove is arranged inside the main body, a hose fixing part is arranged at the notch end of the pressing block movable groove, and the pressing block is The slot end of the movable slot is detachably connected to the limiting plate.

Optionally, the hose fixing portion is provided with a groove or a buckle on the body.

Optionally, a plurality of slide rails are arranged inside the movable groove of the pressing block along the moving direction of the pressing unit.

Optionally, the squeeze-type peristaltic pump further includes: a motor connected to the body, and the motor provides power for the transmission component.

Optionally, a spring is provided between the limiting plate and the pressing unit, and the spring is in a compressed state.

Optionally, the working pressure block is a height-adjustable structure.

Optionally, the working pressure block includes a base block and an adjustment block that can move along the height direction of the base block, and a hose is placed between the adjustment block and the limit plate.

Optionally, the base block is fixedly provided with a guide rail along the height direction, the adjustment block is provided with a guide groove along the height direction, and the guide rail cooperates with the guide groove to enable the adjustment block to move along the guide rail direction. .

Optionally, the base block and the adjustment block are buckled structures, the upper surface of the base block is provided with protrusions, the lower surface of the adjustment block is provided with grooves, and the protrusions are matched with the grooves Install.

Optionally, the working pressure block further includes a thread adjustment mechanism disposed between the base block and the adjustment block.

Optionally, the thread adjustment mechanism includes a double-ended stud with opposite directions of rotation at both ends, the base block and the adjustment block are both provided with threaded holes with the same direction of rotation, and the two ends of the double-ended stud are respectively Installed in the threaded holes of the base block and the adjustment block.

Optionally, screws are fixed inside the adjustment block, and threaded holes are provided in the base block corresponding to the positions of the screws.

Optionally, a through hole is formed on the adjustment block, the screw is fixed in the through hole by a limit plate, and the limit plate is fixed at the bottom of the groove of the adjustment block by a fastening screw.

Optionally, a spring is further provided between the base block and the adjustment block, and the spring is used to provide a support force between the base block and the adjustment block.

Optionally, the limiting plate is a height-adjustable structure.

Optionally, the limiting plate includes a base block and an adjustment block that can move along the height direction of the base block, and a hose is placed between the adjustment block and the working pressure block.

Optionally, the length of the limiting plate along the axial direction of the hose is adjustable.

Optionally, the transmission component is a radially adjustable structure.

Optionally, there is one base block and two or more adjustment blocks.

The above-mentioned at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

The hose is pressed by the pressing unit, which reduces the friction between the hose and the extrusion part, reduces the fatigue damage of the hose, and improves the life of the hose.

By integrating cams with different functions on the same shaft and driven by a single motor, the extrusion type peristaltic pump has a high degree of integration, reduces the structural complexity, and improves the overall working efficiency of the peristaltic pump.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

1 is a schematic three-dimensional structure diagram of Embodiment 1 of a squeeze-type peristaltic pump provided by the embodiment of the present specification;

2 is a schematic diagram of the internal structure of Embodiment 1;

3 is a schematic diagram of the cam structure of the first embodiment;

4 is another schematic diagram of the internal structure of Embodiment 1;

5 is a schematic structural diagram of the transmission component and the pressing unit of the second embodiment;

6 is a schematic structural diagram of the transmission component and the pressing unit of the third embodiment;

FIG. 7 is a schematic diagram of the surface structure of the working pressure block according to the fifth embodiment provided by the embodiment of the present specification;

Figure 8 is a cross-sectional view of the mechanism shown in Figure 7;

FIG. 9 is a schematic diagram of the surface structure of the working briquetting block according to the sixth embodiment provided by the embodiments of the present specification;

FIG. 10 is a cross-sectional view of the structure shown in FIG. 9 .

The reference numerals are specifically explained as follows: 1. Main body; 101. Compression block movable groove; 102. Hose fixing part; 2. Limit plate; 3. Liquid inlet cut-off block; 4. Working pressure block; , adjustment block; 403, screw; 404, spring; 5, liquid discharge cut-off block; 6, camshaft; 601, main shaft; 602, liquid inlet cut-off cam; 603, squeeze cam; 604, liquid discharge cut-off cam; 7, Motor; 8, spring; 9, connecting rod one; 10, connecting rod two; 11, slider; 12, swing rod; 13, cam; 14, hose

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The embodiment of this specification provides a squeezing peristaltic pump, including: a body, a transmission component, a pressing unit and a limit plate, the limit plate is fixedly connected to the body, the pressing unit and the limit plate A hose is placed therebetween, the pressing unit reciprocates under the driving of the transmission component, and is used for pressing the hose, and the pressing unit includes at least two extrusion parts with different structures.

Among them, it should be noted that there is no specific restriction on the reciprocating motion, and it can be a linear reciprocating motion or a swinging reciprocating motion, as long as the hose can be pressed and the fluid can be transmitted.

The body refers to the integral part of the squeezing peristaltic pump, and other structures are installed on the basis of the body. The body here can also be called shell, rack and other names. Wherein, the shell which is empty inside the main body may be without a cover at the top, or without a cover at the top and the bottom. In some embodiments, the transmission component and the pressing unit may be arranged inside the body, or may be arranged outside the body. When there are multiple transmission components and multiple pressing units, there may also be multiple bodies, and one transmission component and one pressing unit can be arranged inside one body.

The pressing unit may be a single component, or may be a whole composed of multiple components. The pressing unit can be understood as a part, component or element, etc., which can press the hose. Compared with the traditional rotary peristaltic pump, through the interval action of the pressing unit, the axial rubbing of the hose is reduced, thereby reducing the excessive friction on the axial direction of the hose, improving the service life of the hose and improving the transmission accuracy.

It should be noted that, in this solution, one hose can be set to form a single-channel peristaltic pump, and two or more hoses can also be set to form a dual-channel or multi-channel peristaltic pump.

In addition, the pressing unit includes at least two extrusion parts with different structures, and it can be understood that the multiple extrusion parts may be arranged together or separately, and there is no connection relationship between the multiple extrusion parts. For example, the pressing unit includes a working pressure block and a hose stop block (liquid inlet stop block and liquid discharge stop block), and different driving parts and transmission parts can be used between the working pressure block and the hose stop block, and there is no connection between them. relation.

Wherein, the working briquetting block may also include two or more sub-briquetting blocks. The hose cut-off block may also include multiple sub-cut-off blocks. This can reduce the occurrence of jamming and other phenomena.

The limit plate is used to limit the hose. It can also be called a fixed block, a fixed plate or an upper pressure block, etc., so that the hose is fixed between the limit plate and the pressing unit. The limit plate is connected to the rotary peristaltic pump. The function of the upper pressure block is similar. Among them, there can be multiple limit plates, which are respectively set corresponding to the liquid inlet cut-off block, the working pressure block and the liquid discharge cut-off block.

The transmission component is used to drive the pressing unit to press the hose, wherein the transmission component may be an eccentric transmission mechanism such as a cam, a link mechanism, a linear transmission mechanism, and the like. The transmission part and the pressing unit can be in point contact, line contact and surface contact.

In some embodiments, the eccentric transmission mechanism sequentially includes a coaxial first eccentric part, a second eccentric part and a third eccentric part, wherein the second eccentric part is an eccentric wheel, the first eccentric part or The third eccentric member is a cam, and the eccentric angles of adjacent eccentric members are different.

In the above embodiment, the eccentric transmission mechanism may include a plurality of eccentric components, and the eccentric components may be understood as components whose geometric center and center of mass (gravity) are not the same point. The eccentric transmission mechanism can include eccentric wheel and cam. The eccentric wheel mainly refers to the circular wheel, and its center is inconsistent with the rotation center. The cam can refer to the mechanical rotary or sliding part (such as the wheel or the protrusion of the wheel), which transmits the motion. To a roller that moves against its edge or a needle bar that moves freely on the groove face, or that it receives forces from such a roller and a needle bar. According to the cam profile, the follower can obtain any expected motion law, and the structure is simple, compact and easy to manufacture.

In some embodiments, the eccentric transmission mechanism is a camshaft with a plurality of cams, the camshafts are rotatably arranged on the body, and the phase angles corresponding to the highest peaks of adjacent cams are different.

In these embodiments, the eccentric transmission mechanism is all completed by the cam structure, and jointly drives different pressing units to achieve different functions. Among them, the phase angles corresponding to the highest peaks of adjacent cams are different, which can be understood as the differences in the central angle positions corresponding to the positions of the highest peaks of the cams. For example, when one cam is in the cutoff state for the hose, the adjacent cams cannot be in the state of cutoff on the hose, that is, the phase angles corresponding to the highest peaks of the adjacent cams are different.

The phase angle can be understood as placing the origin of the X, Y two-dimensional coordinate center at the center of the cam main shaft, and the angle between the positive direction of the X axis and the movement direction of the cam follower is the phase angle. Used for relative corners.

The phase angles corresponding to the highest peaks of multiple cams are different, so that when the pressing unit is driven to press the hose, the functions of several structures of the pressing unit can be distinguished, and different processes can be realized together, such as liquid feeding, transmission and liquid discharge, etc. .

By integrating cams with different functions on the same shaft and driven by a single motor, the squeeze type peristaltic pump has a high degree of integration and reduces the structural complexity.

In addition, it should be noted that the adjacent cams may be in close contact with each other, and may also be separated from each other by a certain distance. One of the structures and principles in which the camshaft realizes the pressing of the hose is specifically described below with the first embodiment.

Example 1

FIG. 1 is a schematic three-dimensional structure diagram of Embodiment 1 of a squeeze-type peristaltic pump provided in the embodiment of this specification, and FIG. 2 is a schematic view of the internal structure of Embodiment 1. As shown in FIGS. 1 and 2 , the squeeze-type peristaltic pump The pump includes: a main body 1, a limit plate 2, a pressing unit arranged in the main body 1, and a transmission component that drives the movement of the pressing unit. The limit plate 2 provides an upper support surface for the hose, and the limit plate 2 and the main body 1 are detachable. The fixed connection prevents the hose from moving upward, and the hose is installed between the limit plate 2 and the pressing unit.

Wherein, the body 1 is provided with a pressing block movable groove 101, wherein the pressing unit is arranged in the pressing block movable groove 101. The pressing unit includes a liquid inlet cut-off block 3 , a working pressure block 4 , and a liquid discharge cut-off block 5 arranged in sequence along the axial direction of the hose. The liquid inlet cut-off block 3 and the liquid discharge cut-off block 5 are both arranged at the end of the flexible groove of the hose, and the liquid feed cut-off block 3 is close to the liquid inlet direction of the hose, and the liquid discharge cut-off block 5 is close to the liquid outlet direction of the hose. The pressing block 4 is arranged between the liquid inlet cut-off block 3 and the liquid discharge cut-off block 5 .

The transmission component is a camshaft 6 having a plurality of cam structures, and the camshaft 6 is rotatably arranged on the body 1 . As shown in FIG. 3, the camshaft 6 includes a main shaft 601, a liquid inlet cut-off cam 602, a squeeze cam 603 and a liquid discharge cut-off cam 604. The phase angles corresponding to the highest peaks of adjacent cams are different, which can be understood as the highest point of the cam If they are not in the same position, there is a phase difference, which makes the action sequence of the liquid inlet cut-off block 3, the working pressure block 4 and the liquid discharge cut-off block 5 different.

By coordinating the phase angle of each cam, the working order of each pressing block of the squeezing peristaltic pump can be directly adjusted, and the linkage effect of each control unit can be directly obtained, which simplifies the control process of the peristaltic pump and improves the control efficiency.

In this embodiment, the liquid feed cutoff cam 602 corresponds to the liquid feed cutoff block 3 , the extrusion cam 603 corresponds to the working pressure block 4 , and the liquid discharge cutoff cam 604 corresponds to the liquid discharge cutoff block 5 . The liquid feed cutoff cam 602 drives the liquid feed cutoff block 3 to perform linear reciprocating motion, the liquid discharge cutoff cam 604 drives the liquid discharge cutoff block 5 to perform linear reciprocating motion, and the extrusion cam 603 drives the working pressure block 4 to perform linear reciprocating motion.

It should be noted that the camshaft 6 can also be a combined structure, that is, the liquid inlet cut-off cam 602, the squeeze cam 603 and the liquid discharge cut-off cam 604 can be independent structures, and can be fixed on the main shaft 601 by any radial fixing method , can be fixed with positioning pins.

In addition, the liquid inlet cut-off cam 602, the extrusion cam 603 and the liquid discharge cut-off cam 604 can be set as an integral structure, and the requirements for processing or injection molding are relatively high at this time.

By only using the pressure block at the end of the extrusion area as the cut-off block, the hose is only compressed and sealed by the cut-off block area, avoiding the overall compaction of the extrusion area, and reducing the pressure on the entire section of the hose extrusion area. , reduce the fatigue damage of the hose and improve the life of the hose.

In the direction close to the limiting plate 2, a hose fixing part 102 is provided at the notch end of the main body 1. In this embodiment, the hose fixing part 102 is a groove on the main body 1, and both ends of the hose penetrate into the groove. in the groove. This structure is relatively simple and will not affect the installation of the limiting plate 2 .

As shown in Figures 1 and 2, in this embodiment, the limit plate 2 and the body are fixed by 4 detachable screws. When the tube needs to be replaced, the screws can be removed, the limit plate 2 can be removed, and the limit plate 2 can be installed. After plate 2, it is fastened with screws.

In other embodiments, the hose may also be hijacked by arranging a buckle on the body, which will not be described in detail.

In addition, the squeezing type peristaltic pump may also include: a motor 7 connected to the body 1, the motor 7 provides power for the camshaft 6, wherein both ends of the camshaft 6 are mounted on the body 1, and one end is connected to the outlet of the motor 7. shaft connection. The same motor drives the three pressing blocks of the squeezing peristaltic pump, which improves the overall working efficiency of the peristaltic pump.

In addition, as shown in FIG. 4 , a spring 8 is provided between the limit plate 2 and the pressing unit, and the spring 8 is always in a compressed state, so that when the pressing unit is in the return stroke, the pressing unit can be quickly reset to avoid the insufficient elasticity of the hose. The problem that the pressure block is difficult to reset occurs.

A plurality of slide rails are arranged on the inner side of the pressure block moving groove 101 along the moving direction of the pressing unit, and the pressure block moves along the slide rails to reduce the frictional force of the pressure block movement.

In order to facilitate the clamping of the hose by the liquid inlet cut-off block and the liquid discharge cut-off block, the liquid inlet cut-off block and the liquid discharge cut-off block are designed as clamping blocks, that is, the top has a certain bevel to reduce the extrusion area of the cut-off block and make the clamping block The pressure on the hose increases, which improves the effect of the pressure, so that the cut-off block can quickly press and close the hose to realize cut-off.

In addition, elastic material can also be provided on the lower end face of the limiting plate (near the end face of the hose) and corresponding to the position of the clamping block, so that the hose can also be clamped when the clamping block is worn.

In this embodiment, the pressure block is arranged above the camshaft, and the liquid inlet cut-off cam, the squeeze cam and the liquid discharge cut-off cam of the camshaft are all basic cam structures, including a push section, an elevation stop section, a return section and an initial section. During the rotation of the camshaft, the push section pushes the pressure block upward to squeeze the hose, and the elevation stop section keeps the pressure block at the extrusion height. When the cam moves to the return section, due to the gravity of the pressure block , the pressure block moves downward to loosen the hose, and resets to the initial segment along the return section to complete the hose reset. Squeeze and reset the hose through the periodic movement of the cam.

The liquid inlet cut-off cam is related to the phase angle of the liquid discharge cut-off cam. Within the circumferential range, the elevation stop sections of the liquid feed cut-off cam and the liquid discharge cut-off cam are combined with each other, so that the camshaft has a pressure block at any angle position to maintain the highest position on the hose. Squeeze in position to keep the hose closed and shut off.

The diameter of the initial arc of the liquid inlet cut-off cam, the extrusion cam and the liquid discharge cut-off cam is the same, so that the hose maintains the same elastic state at the reset position, and the cams all start to squeeze from the elastic deformation of the hose (such as 80% of the hose). height), that is, when the pressure block is at the initial position of the cam, it has a certain extrusion force on the hose, so that the hose always maintains a good elastic recovery state during the working process of the squeeze peristaltic pump.

The height stop section of the liquid inlet cut-off cam and the liquid discharge cut-off cam are the same. In the height stop section, the distance between the cut-off block and the limit plate is less than 2 times the wall thickness of the hose, so that the hose generates overpressure, thereby ensuring that the hose is cut off The elevation stop section of the block is tightly closed to avoid liquid backflow in the pipeline. The diameter of the elevation stop section of the extrusion cam is smaller than the elevation stop section of the cut-off cam, and the distance between the working pressure block and the limit plate in the elevation stop section of the extrusion cam is greater than 2 times the wall thickness of the hose to avoid excessive extrusion of the hose , thereby improving the elasticity and restoring force of the hose at the position of the working pressure block, reducing the fatigue damage in the working pressure block area, and improving the mobility and service life of the hose.

Based on the above principles, the working process of the squeeze peristaltic pump is as follows:

Step 1: The camshaft rotates, the liquid inlet stop cam starts to move from the push section, and the liquid inlet stop block moves upward to squeeze the hose. At this time, the drain stop cam is located in the elevation stop section, and the drain stop block keeps closed to the hose. , When the liquid inlet cut-off cam rotates to the elevation stop section, the liquid inlet cut-off block closes the hose, and there is a liquid inlet cut-off block to keep the liquid cut off.

Step 2: Then, the discharge cut-off cam enters the return section, and the opening of the hose is gradually opened in the direction of liquid discharge, until the discharge cut-off block is reset to the initial section, and the discharge port is completely opened.

Step 3: The squeeze cam rotates to the push section, at the same time or later, the discharge cut-off cam enters the push section, and the working pressure block and the discharge cut-off block start to squeeze the hose at the same time, so that the inside of the tube is squeezed. The liquid is discharged from the outlet direction of the hose, and the hose is gradually closed by the discharge stop block until the movement of the discharge stop block reaches the elevation stop section, and the discharge port is completely closed and the liquid is cut off. During this process, the working briquette needs to enter the elevation stop section before the liquid discharge cut-off block, so as to prevent the working briquette from being unable to squeeze and discharge the liquid in this area.

Step 4: The liquid inlet cut-off cam and the squeeze cam enter the return section, the opening of the hose in the liquid inlet direction is gradually opened, and the working pressure block hose section is rapidly opened until the liquid inlet cut-off block is reset to the initial section, and the liquid inlet is completely opened. . Due to the reset function of the hose, the liquid is sucked into the inner cavity by the hose, and the liquid accumulation is completed.

Step 5: Go back to Step 1.

Continuously circulating according to the above steps, the liquid can be moved in the hose from the liquid inlet direction to the liquid outlet direction, and the pumping function of the squeezing peristaltic pump can be realized.

Embodiment 2

Different from the first embodiment, the transmission component may be a link mechanism, and one end of the pressing unit performs linear reciprocating motion (as shown in FIG. 5 ) driven by the link to periodically squeeze the hose.

As shown in FIG. 5 , the first link 9 can be rotated with one end as the center, and then the first link 9 drives the second link 10 to rotate, and the second link 10 pushes the slider 11 to move along a straight line, wherein the slider 11 can be used as a The extruder squeezes the hose.

Among them, the liquid inlet cut-off cam, the extrusion cam and the work cut-off cam can all adopt the above structures.

Embodiment 3

In this embodiment, as shown in FIG. 6 , the transmission component is the cam 13 , the pressing unit is the swing lever 12 , one end of the swing lever 12 is hinged on the body, and the other end of the swing lever 12 swings and reciprocates under the drive of the cam 13 Movement, squeeze hose 14 periodically.

It can be understood that, in this embodiment, the hose can be pressed by a combination of a cam and a swing lever. For the extrusion part, the transmission part can be a cam, and the extrusion block can be a swing lever. The swing lever is driven by the cam. down, press on the hose.

For the transmission parts and pressing structure of the cut-off part, a combination of a cam and a pressing block can be used, and a combination of a cam and a swing rod can also be used, which is not limited.

Embodiment 4

Different from the third embodiment, the transmission component and the pressing unit can both be rods, and the two constitute a link mechanism.

One end of the transmission rod is sleeved on the swing rod, the transmission rod can slide on the swing rod, and one end of the swing rod is hinged on the body. The transmission rod rotates under the driving of the motor, and the other end of the swing rod swings and reciprocates under the driving of the transmission rod.

In addition, the embodiments of this specification also provide some embodiments, wherein the structure of the working pressure block, the limit plate or the transmission component can be adjusted, and the flow rate of the peristaltic pump can be changed to meet different flow requirements.

Among them, the working pressure block and the limit plate can be height-adjustable, so as to adjust the degree of extrusion in the radial direction of the hose, so as to adjust the discharge volume of the hose once squeezed. The working pressure block and the limit plate can be adjustable in length, so that the axial extrusion length of the hose can be adjusted, so as to adjust the discharge volume of the hose once squeezed.

In addition, the structure of the transmission part can also be adjusted, so as to adjust the degree of squeezing the hose. When the transmission component is a connecting rod, the length of the connecting rod can be adjusted to adjust the degree of compression of the hose. The pressing state of the working pressure block can be changed by adjusting the structure of the transmission part.

Embodiment 5

In this solution, the height of the working pressure block can be adjusted. As shown in FIG. 7 and FIG. 8 , the working pressure block includes a base block 401 and an adjustment block 402 that can move along the height direction of the base block. The hoses are placed between the limit plates 2 .

Two sides of the base block 401 are fixedly provided with guide rails along the height direction. The guide rails are used to control the moving direction of the adjustment block 402. The two sides of the adjustment block 402 are provided with guide grooves along the height direction. The guide rails cooperate with the guide grooves to make the adjustment block The 402 can move along the direction of the guide rail to avoid the dislocation of the adjustment block 402 and the base block 401 during the movement.

Wherein, the guide rail may be a fixed part of the base block 401, and a specific shape is produced by processing. It may not be a fixed part of the base block 401 , and can be fixedly connected with the base block 401 at this time.

Wherein, the working pressure block further includes a thread adjustment mechanism disposed between the base block 401 and the adjustment block 402, and the distance between the base block 401 and the adjustment block 402 is realized by the thread adjustment mechanism.

The thread adjustment mechanism can be a screw 403 fixed inside the adjustment block 402, a threaded hole is provided in the base block 401 corresponding to the position of the screw, a through hole is opened on the adjustment block 402, and the screw is fixed in the through hole through the connecting plate, wherein the screw The cap is located in the through hole, and the through hole is a through hole with a small top and a large bottom. The nut of the screw 403 can be stuck in the lower part of the screw hole and cannot be pulled out from the upper part of the through hole. Partially inserted into the threaded hole of the base block 401, in order to prevent the nut from coming out of the through hole, this embodiment uses a connecting plate to fix it, wherein the screw 403 passes through the connecting plate, and the through hole on the connecting plate is The diameter inside the hole or threaded hole is smaller than the diameter of the nut of the screw 403 .

In addition, in order to fix the position of the connecting plate, the connecting plate and the adjustment block 402 are fixed by tightening screws.

As shown in FIG. 8 , a spring 404 is further provided between the base block 401 and the adjustment block 402 , and the spring 404 is used to provide a supporting force between the base block 401 and the adjustment block 402 to maintain the connection balance.

When the squeezing peristaltic pump needs to adjust the flow, rotate the screw 403 to realize the movement of the base block and the adjustment block along the mating surface of the protrusion and the groove, so that the base block and the adjustment block are close to or away from each other, and the height of the working pressure block can be changed, improving the The extrusion distance between the working briquette and the supporting surface can adjust the amount of liquid extruded.

Embodiment 6

Different from the fifth embodiment, as shown in FIG. 9 and FIG. 10 , the working pressure block includes a base block 401 and a plurality of adjustment blocks 402 .

Embodiment 7

The difference from the fifth embodiment is that the base block 401 and the adjustment block 402 are buckled structures, the upper surface of the base block 401 is provided with protrusions, and the lower surface of the adjustment block 402 is provided with grooves, and the protrusions cooperate with the grooves. Install. At this time, the protrusion is used as a guide rail, and the groove is used as a guide groove, and the groove of the adjustment block 402 can slide along the mating surface of the protrusion, so as to realize the adjustment of the height of the working pressure block.

Embodiment 8

The difference from the fifth embodiment is that the thread adjustment mechanism includes double-ended studs with opposite directions of rotation at both ends, the base block 401 and the adjustment block 402 are both provided with threaded holes with the same rotation Installed in the threaded holes of the base block 401 and the adjustment block 402, the base block 401 and the adjustment block 402 can be moved in the same or opposite directions by rotating the studs, thereby adjusting the overall height of the working pressure block.

Embodiment 9

In this embodiment, the limiting plate is a height-adjustable structure. Like the working pressure block, the limiting plate may include a base block and an adjustment block that can move along the height direction of the base block, and a hose is placed between the adjustment block and the working pressure block.

Most of the structure of this embodiment is the same as that of the first embodiment, and a structure in which the base block and the adjustment block cooperate with each other is adopted. For the specific structure, refer to the first embodiment.

The difference from the first embodiment is that at this time, the adjustment pressure block is located at the bottom and the base block is located at the top, which makes it easier to install the hose, and the setting position of the hose will not be affected by the height change of the limit plate.

Embodiment ten

The fifth to ninth embodiments are to adjust the height of the working pressure block or the limit plate. In this embodiment, the length of the limit plate can also be adjusted, and the length can be understood as the length of the limit plate along the axial direction of the hose. . In this embodiment, the contact area between the working pressure block and the limiting plate can be adjusted. The specific structure of the length-adjustable limit plate can refer to the design principle of the telescopic dining table. For example, the two end blocks of the limit plate can be stretched to embed the middle block.

Embodiment 11

Referring to the ninth embodiment, the working pressure block is considered to be divided into several independent sub-pressure blocks, and the length of the limit plate is fixed. Adjust the single-discharge volume of the software.

Embodiment 12

In this embodiment, the transmission part can be set as an adjustable structure.

For example, when the transmission component is a connecting rod, the length of the connecting rod can be adjusted to adjust the degree of squeezing the hose. When the transmission component is a cam structure, the cam includes a circular structure and a circular arc structure, wherein the circular structure and the circular arc structure are connected by a spring or an adjustable screw, that is, an adjustable circular structure and a circular arc structure are formed. A structure in which the distance between the arc structures can be adjusted.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion, such that a device comprising a list of elements includes not only those elements, but also those not expressly listed. Other elements, or also include elements inherent to this device. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a device that includes said element.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (34)

1. An extruded peristaltic pump, comprising: the hose pressing device comprises a body, a transmission component, a pressing unit and a limiting plate, wherein the limiting plate is fixedly connected with the body, the pressing unit is used for placing a hose between the limiting plates, the pressing unit is driven by the transmission component to reciprocate and is used for pressing the hose, and the pressing unit comprises at least two extruded parts with different structures.

2. The squeeze peristaltic pump of claim 1, wherein the pressing unit is linearly reciprocated by the driving member.

3. The squeeze peristaltic pump of claim 2, wherein the transmission member is an eccentric transmission or a linear transmission.

4. The extrusion peristaltic pump of claim 3, wherein the eccentric transmission mechanism comprises a first eccentric member, a second eccentric member, and a third eccentric member that are coaxial in sequence, wherein the second eccentric member is an eccentric, the first eccentric member or the third eccentric member is a cam, and the eccentric angles of adjacent eccentric members are different.

5. The extrusion peristaltic pump of claim 3, wherein the eccentric drive mechanism is a cam shaft having a plurality of cams, the cam shaft being rotatably disposed on the body, the highest peaks of adjacent cams corresponding to different phase angles.

6. The extrusion type peristaltic pump as claimed in claim 5, wherein the pressing unit includes a liquid inlet stop block, a working pressure block and a liquid discharge stop block, which are sequentially arranged along the axial direction of the hose, and the cam shaft sequentially includes a liquid inlet stop cam, an extrusion cam and a liquid discharge stop cam along the liquid transmission direction, the liquid inlet stop cam is used for driving the liquid inlet stop block to reciprocate, the liquid discharge stop cam is used for driving the liquid discharge stop block to reciprocate, and the extrusion cam is used for driving the working pressure block to reciprocate.

7. The extrusion type peristaltic pump as claimed in claim 6, wherein the liquid inlet stop cam, the extrusion cam and the liquid discharge stop cam are independent structures and are fixed on the main shaft.

8. The squeeze peristaltic pump of claim 6, wherein the inlet cutoff cam, the squeeze cam, and the discharge cutoff cam are of a unitary construction.

9. The squeeze peristaltic pump as set forth in claim 6, wherein said intake block and said discharge block are clamping blocks.

10. The extrusion peristaltic pump as recited in claim 9, wherein the retainer plate is disposed adjacent the end surface of the hose and includes an elastomeric material disposed at a location corresponding to the clamp block.

11. The squeeze peristaltic pump of claim 6, wherein the working block comprises two or more sub-blocks, or wherein the intake stop block comprises two or more sub-stop blocks, or wherein the discharge stop block comprises two or more sub-stop blocks.

12. The extrusion type peristaltic pump as claimed in claim 6, wherein the plurality of the limiting plates are respectively provided corresponding to the liquid inlet stopping block, the working pressing block and the liquid discharge stopping block.

13. The squeeze peristaltic pump of claim 1, wherein the pressing unit is driven by the transmission member to make an oscillating reciprocating motion.

14. The extrusion type peristaltic pump as claimed in claim 13, wherein the transmission member is a cam, the pressing unit is a swinging rod, one end of the swinging rod is hinged to the body, and the other end of the swinging rod is driven by the cam to perform swinging reciprocating motion to periodically extrude the hose.

15. The extrusion type peristaltic pump as claimed in claim 1, wherein the transmission member and the pressing unit are both rod members, and both of the rod members constitute a link mechanism, and one end of the pressing unit is driven by the transmission member to reciprocate so as to periodically press the flexible tube.

16. The extrusion type peristaltic pump as claimed in claim 1, wherein the transmission member and the pressing unit are disposed inside the body, a pressing block moving groove is disposed inside the body, a hose fixing portion is disposed at a notch end of the pressing block moving groove, and the limiting plate is detachably connected to the notch end of the pressing block moving groove.

17. The squeeze peristaltic pump of claim 16, wherein the hose retainer is a groove or a snap on the body.

18. The squeeze peristaltic pump as claimed in claim 16, wherein a plurality of slide rails are provided inside the pressing block moving groove in a moving direction of the pressing unit.

19. The extrusion peristaltic pump of claim 1, further comprising: and the motor is connected with the body and provides power for the transmission part.

20. The extrusion peristaltic pump of claim 1, wherein a spring is disposed between the retainer plate and the pressing unit, the spring being in a compressed state.

21. The squeeze peristaltic pump of claim 6, wherein the working block is of a height adjustable construction.

22. The squeeze peristaltic pump of claim 21, wherein the working pressure block comprises a base block and an adjusting block capable of moving in the height direction of the base block, and a hose is disposed between the adjusting block and the limiting plate.

23. The extrusion type peristaltic pump as claimed in claim 22, wherein the base block is fixedly provided with a guide rail in the height direction, the adjusting block is provided with a guide groove in the height direction, and the guide rail and the guide groove cooperate to enable the adjusting block to move in the direction of the guide rail.

24. The extrusion peristaltic pump of claim 22, wherein the base block and the adjustment block are snap-fit structures, wherein a protrusion is disposed on an upper surface of the base block, a groove is disposed on a lower surface of the adjustment block, and the protrusion is fitted with the groove.

25. The squeeze peristaltic pump of claim 22, wherein the work press further comprises a threaded adjustment mechanism disposed between the base block and the adjustment block.

26. The extrusion peristaltic pump of claim 25, wherein the thread adjusting mechanism comprises a stud with opposite hand turning directions, the base block and the adjusting block are both provided with threaded holes with the same hand turning direction, and two ends of the stud are respectively mounted in the threaded holes of the base block and the adjusting block.

27. The extrusion peristaltic pump of claim 25, wherein the adjustment block has a screw secured therein, and a threaded hole is provided in the base block at a location corresponding to the screw.

28. The extrusion peristaltic pump of claim 27, wherein the adjustment block is provided with a through hole, the screw is fixed in the through hole through a connecting plate, and the connecting plate is fixed at the bottom of the groove of the adjustment block through a fastening screw.

29. The squeeze peristaltic pump of claim 22, wherein a spring is further disposed between the base block and the adjustment block, the spring for providing a holding force between the base block and the adjustment block.

30. The extrusion peristaltic pump of claim 6, wherein the retainer plate is height adjustable.

31. The squeeze peristaltic pump of claim 30, wherein the retainer plate includes a base block and an adjustment block movable in a height direction of the base block, and a hose is disposed between the adjustment block and the working block.

32. The squeeze peristaltic pump of claim 1, wherein the length of the retainer plate in the axial direction of the hose is adjustable.

33. The squeeze peristaltic pump of claim 1, wherein the transmission member is of radially adjustable construction.

34. The squeeze peristaltic pump of claim 22, wherein the number of the base blocks is 1 and the number of the adjustment blocks is two or more.

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