CN114962356B - Multi-stage energized jet pump - Google Patents

Abstract

The invention discloses a multistage energized jet pump, which relates to the technical field of jet pumps and comprises the following components: a suction chamber; a high pressure fluid inlet pipe communicated with the cavity of the suction chamber; a medium pressure fluid outlet pipe which is communicated with the cavity of the suction chamber; the low-pressure fluid inlet pipe is connected with the side wall of the suction chamber and is communicated with the cavity of the suction chamber; the nozzle is connected with one end of the high-pressure fluid inlet pipe extending into the suction chamber, the nozzle is formed by sequentially connecting a plurality of buffer cavities, and the volumes of the buffer cavities are sequentially reduced from the direction close to the high-pressure fluid inlet pipe to the direction close to the medium-pressure fluid outlet pipe. According to the jet pump, the nozzle is formed by sequentially connecting the plurality of buffer cavities, the volumes of the buffer cavities are sequentially reduced from the direction close to the high-pressure fluid inlet pipe to the direction close to the medium-pressure fluid outlet pipe, the energy adding effect on fluid can be achieved between the adjacent buffer cavities, the flow velocity of the fluid flowing through the nozzle is further increased, and the working efficiency of the jet pump is improved.

Description

Multi-stage energized jet pump

Technical field

The present invention relates to the technical field of jet pumps, and more specifically to a multi-stage energized jet pump.

Background technique

At present, jet pumps are widely used because they have no moving working components, simple structure, reliable operation and no leakage.

However, jet pumps usually use nozzles with a linearly tapered cross section and no energy-adding structural settings, resulting in low flow rates in the nozzles. When the air inlet pressure is insufficient, the flow rate in the jet pump nozzles will be low, making the jet pump inoperable. The problem of reduced efficiency.

Therefore, how to provide a jet pump that increases the flow rate of the jet pump nozzle is an urgent problem that those skilled in the art need to solve.

Contents of the invention

In view of this, the present invention provides a multi-stage energized jet pump, aiming to solve the problems in the above background technology and achieve an increase in the flow rate of the jet pump nozzle.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A multi-stage energized jet pump, including:

suction chamber;

A high-pressure fluid inlet pipe, the high-pressure fluid inlet pipe is connected to the first end of the suction chamber, the high-pressure fluid inlet pipe is connected to the cavity of the suction chamber, and one end of the high-pressure fluid inlet pipe extends into the inside the cavity of the suction chamber;

a medium-pressure fluid outlet pipe, the medium-pressure fluid outlet pipe is connected to the second end of the suction chamber, and the medium-pressure fluid outlet pipe is connected to the cavity of the suction chamber;

a low-pressure fluid inlet pipe, the low-pressure fluid inlet pipe is connected to the side wall of the suction chamber, and the low-pressure fluid inlet pipe is connected to the cavity of the suction chamber;

The nozzle is connected to one end of the high-pressure fluid inlet pipe extending into the suction chamber. The nozzle is formed by a plurality of buffer chambers connected in sequence. The volumes of the plurality of buffer chambers are formed close to the high-pressure fluid inlet pipe. It gradually decreases toward the medium-pressure fluid outlet pipe, and the outlet cross-sectional area of the buffer chamber away from the high-pressure fluid inlet pipe is smaller than the outlet cross-sectional area of the buffer chamber close to the high-pressure fluid inlet pipe.

Furthermore, the high-pressure fluid inlet pipe has a tapered structure from an end far away from the suction chamber to an end close to the suction chamber.

Further, the medium-pressure fluid outlet pipe includes a straight arm tube and an expansion tube. The small end of the expansion tube is connected to one end of the straight arm tube, and the other end of the straight arm tube is connected to the suction chamber.

Further, one end of the straight arm tube close to the suction chamber extends into the suction chamber.

Further, the medium-pressure fluid outlet pipe and the high-pressure fluid inlet pipe are coaxially arranged.

Further, the nozzle has a rotating body structure along its axis.

Further, two adjacent buffer chambers are connected through connecting pipes, and the diameter of the connecting pipe far away from the high-pressure fluid inlet pipe is smaller than the diameter of the connecting pipe close to the high-pressure fluid inlet pipe.

Further, the connecting pipe is a reducer tube, and the small end of the reducer tube faces a direction away from the high-pressure fluid inlet pipe.

It can be seen from the above technical solutions that, compared with the prior art, the present invention provides a multi-stage energized jet pump, which is formed by multiple buffer chambers connected in sequence through a nozzle, and the volume of the buffer chamber is increased from close to the high-pressure fluid inlet. The pipes gradually decrease in the direction of the medium-pressure fluid outlet pipe, and the adjacent buffer cavities can achieve an energizing effect on the fluid, thereby increasing the flow rate of the fluid when it flows through the nozzle, thereby improving the working efficiency of the jet pump.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a multi-stage energized jet pump provided by the present invention.

Figure 2 is a schematic structural diagram of another multi-stage energized jet pump provided by the present invention.

Among them: 1 is the suction chamber; 2 is the high-pressure fluid inlet pipe; 3 is the medium-pressure fluid outlet pipe; 31 is the straight arm pipe; 32 is the expansion pipe; 4 is the low-pressure fluid inlet pipe; 5 is the nozzle; 6 is the buffer chamber; 7 For connecting pipe.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example 1

Referring to Figure 1, an embodiment of the present invention discloses a multi-stage energized jet pump, including:

suction chamber 1;

The high-pressure fluid inlet pipe 2 is connected to the first end of the suction chamber 1. The high-pressure fluid inlet pipe 2 is connected to the cavity of the suction chamber 1. One end of the high-pressure fluid inlet pipe 2 extends into the cavity of the suction chamber 1. in vivo;

The medium-pressure fluid outlet pipe 3 is connected to the second end of the suction chamber 1, and the medium-pressure fluid outlet pipe 3 is connected to the cavity of the suction chamber 1;

Low-pressure fluid inlet pipe 4, the low-pressure fluid inlet pipe 4 is connected with the side wall of the suction chamber 1, and the low-pressure fluid inlet pipe 4 is connected with the cavity of the suction chamber 1;

The nozzle 5 is connected to one end of the high-pressure fluid inlet pipe 2 extending into the suction chamber 1. The nozzle 5 is formed by a plurality of buffer chambers 6 connected in sequence. The volumes of the plurality of buffer chambers 6 change from close to the high-pressure fluid inlet pipe 2 to the medium-pressure fluid. The direction of the outlet pipe 3 decreases successively, and the outlet cross-sectional area of the buffer chamber 6 far away from the high-pressure fluid inlet pipe 2 is smaller than the outlet cross-sectional area of the buffer chamber 6 close to the high-pressure fluid inlet pipe 2 .

Among them, in this embodiment, preferably, there are three buffer chambers 6, and the cross-sectional areas of the three buffer chambers 6 are all rectangular structures, that is, the cross-sectional areas range from the buffer near the high-pressure fluid inlet pipe 2 to the medium-pressure fluid outlet pipe 3. The cross-sectional areas of the chambers 6 are S1, S2, and S3 respectively, and S1>S2>S3. The adjacent buffer chambers 6 pass through a right-angle transition. When the fluid flows from the first buffer chamber 6 to the second buffer chamber 6, the flow The flow area is decreasing, and the flow velocity at the second buffer chamber 6 is greater than the flow velocity at the first buffer chamber 6. At the same time, when the fluid enters the buffer chamber 6 with a cross-sectional area of S1 from the high-pressure fluid inlet pipe 2, the fluid is The pressure in the first buffer chamber 6 decreases. Under the action of the pressure difference, the flow rate flowing from the high-pressure fluid inlet pipe 2 into the first buffer chamber 6 increases. In the same way, the flow rate from the second buffer chamber 6 to the third buffer chamber 6 increases. The buffer chambers 6 also follow the principle from the first buffer chamber 6 to the second buffer chamber 6, so that the flow rate entering the jet pump continues to increase, and ultimately the speed of the fluid ejected from the nozzle 5 increases, causing the fluid to Under the action of multi-stage energy addition, the flow rate of the jet pump nozzle 5 is increased.

In this embodiment, the high-pressure fluid inlet pipe 2 has a tapered structure from the end far away from the suction chamber 1 to the end close to the suction chamber 1. By arranging the high-pressure fluid inlet pipe 2 into a gradually contracting structure along the path direction of the fluid, It can accelerate the fluid flowing through the high-pressure fluid inlet pipe 2 .

In this embodiment, preferably, the medium pressure fluid outlet pipe 3 includes a straight arm tube 31 and an expansion tube 32. The small end of the expansion tube 32 is connected to one end of the straight arm tube 31, and the other end of the straight arm tube 31 is connected to the suction chamber. 1 connected. One end of the straight arm tube 31 close to the suction chamber 1 extends into the suction chamber 1 . The high-pressure fluid sprayed from the nozzle 5 is mixed with the low-pressure fluid sprayed from the low-pressure fluid inlet pipe 4 . The mixed fluid is mixed again in the straight arm pipe 31 to form a medium-pressure fluid. The medium-pressure fluid is finally sprayed from the expansion tube 32 out.

In this embodiment, preferably, the medium-pressure fluid outlet pipe 3 and the high-pressure fluid inlet pipe 2 are coaxially arranged.

In the above embodiment, the nozzle 5 has a rotating body structure along its axis. By arranging the nozzle 5 into a rotary structure, the force on the high-pressure fluid ejected from the nozzle 5 can be balanced in all directions, ensuring that the direction of the high-pressure fluid ejected from the nozzle 5 moves forward along the axis of the nozzle 5 .

In the above embodiment, preferably, two adjacent buffer chambers 6 are connected through connecting pipes 7 , and the diameter of the connecting pipe 7 far away from the high-pressure fluid inlet pipe 2 is smaller than the diameter of the connecting pipe 7 close to the high-pressure fluid inlet pipe 2 . By making the cross-sectional area of the connecting tube 7 between the first buffer chamber 6 and the second buffer chamber 6 larger than the cross-sectional area of the connecting tube 7 between the second buffer chamber 6 and the third buffer chamber 6, it can be achieved The flow rate of fluid flowing through the connecting pipe 7 between the second buffer chamber 6 and the third buffer chamber 6 is greater than the flow rate flowing through the connecting pipe 7 between the first buffer chamber 6 and the second buffer chamber 6, so that Achieve the energizing effect on the fluid.

According to some embodiments of the present invention, the connecting tube 7 is a tapered tube, and the small end of the tapered tube faces away from the high-pressure fluid inlet pipe 2 . By configuring the connecting tube 7 to have a tapered tube structure, and having the small end of the connecting tube 7 facing the flow direction of the fluid, the energizing effect on the fluid can be achieved.

Example 2

Referring to Figure 2, the only difference between the multi-stage energized jet pump disclosed in this embodiment and Embodiment 1 is that in this embodiment, two buffer cavities 6 are provided, and the cross-sectional areas of the two buffer cavities 6 are equal. It is a trapezoidal structure, so that the change rate of the two adjacent buffer chambers 6 is relatively slow during the volume change process. The volume of the buffer chamber 6 near the high-pressure fluid inlet pipe 2 is larger than the volume of the buffer chamber 6 near the medium-pressure fluid outlet pipe 3, that is, The cross-sectional area of the outlet of the buffer chamber 6 close to the high-pressure fluid inlet pipe 2 is larger than the cross-sectional area of the outlet of the buffer chamber 6 close to the medium-pressure fluid outlet pipe 3. When the fluid flows through the nozzle, the pressure decrease trend is a continuous and slow change. The impact of fluid on the buffer chamber 6 is reduced to a certain extent.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For relevant details, please refer to the description in the method section.

The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A multi-stage energized jet pump, characterized in that it includes: suction chamber; A high-pressure fluid inlet pipe, the high-pressure fluid inlet pipe is connected to the first end of the suction chamber, the high-pressure fluid inlet pipe is connected to the cavity of the suction chamber, and one end of the high-pressure fluid inlet pipe extends into the inside the cavity of the suction chamber; a medium-pressure fluid outlet pipe, the medium-pressure fluid outlet pipe is connected to the second end of the suction chamber, and the medium-pressure fluid outlet pipe is connected to the cavity of the suction chamber; a low-pressure fluid inlet pipe, the low-pressure fluid inlet pipe is connected to the side wall of the suction chamber, and the low-pressure fluid inlet pipe is connected to the cavity of the suction chamber; The nozzle is connected to one end of the high-pressure fluid inlet pipe extending into the suction chamber. The nozzle is formed by a plurality of buffer chambers connected in sequence. The volumes of the plurality of buffer chambers are formed close to the high-pressure fluid inlet pipe. It gradually decreases toward the medium-pressure fluid outlet pipe, and the outlet cross-sectional area of the buffer chamber away from the high-pressure fluid inlet pipe is smaller than the outlet cross-sectional area of the buffer chamber close to the high-pressure fluid inlet pipe; Two adjacent buffer chambers are connected through connecting pipes, and the diameter of the connecting pipe far away from the high-pressure fluid inlet pipe is smaller than the diameter of the connecting pipe close to the high-pressure fluid inlet pipe. 2. The multi-stage energized jet pump according to claim 1, wherein the high-pressure fluid inlet pipe has a tapered structure from an end far away from the suction chamber to an end close to the suction chamber. 3. The multi-stage energized jet pump according to claim 1, wherein the medium-pressure fluid outlet tube includes a straight arm tube and an expansion tube, and the small end of the expansion tube is connected to the end of the straight arm tube. One end is connected, and the other end of the straight arm tube is connected with the suction chamber. 4. The multi-stage energized jet pump according to claim 3, wherein one end of the straight arm tube close to the suction chamber extends into the suction chamber. 5. The multi-stage energized jet pump according to claim 1, wherein the medium pressure fluid outlet pipe and the high pressure fluid inlet pipe are coaxially arranged. 6. The multi-stage energized jet pump according to claim 1, wherein the nozzle has a rotary structure along its axis. 7. The multi-stage energized jet pump according to claim 1, wherein the connecting tube is a tapered tube, and the small end of the tapered tube faces away from the high-pressure fluid inlet pipe.