Self-cooling multiphase multiphase pump

Abstract

The invention discloses a self-cooling multiphase mixed transportation pump, and relates to the technical field of ground transportation, the self-cooling multiphase mixed transportation pump comprises an outer shell, an action module and a liquid inlet and outlet module, the outer shell is internally provided with a cooling cavity and at least one pumping cavity, the cooling cavity is provided with a liquid inlet and a liquid outlet, the liquid inlet is used for enabling produced liquid to enter the cooling cavity, and the liquid outlet is used for enabling the produced liquid to enter the pumping cavity. The liquid outlet is communicated with the liquid inlet end of the liquid inlet and outlet module, the liquid outlet end of the liquid inlet and outlet module is communicated with a liquid outlet, the action module is located in the outer shell and penetrates through the cooling cavity, the action end of the action module is located in the pumping cavity, and when the action module acts, the action end of the action module is communicated with the liquid outlet end of the liquid inlet and outlet module. The liquid inlet and outlet module can drive produced liquid to enter the cooling cavity through the liquid inlet, enable the produced liquid in the cooling cavity to reach the liquid inlet and outlet module through the liquid outlet, and enable the produced liquid to be discharged through the liquid outlet. Reliable conveying and self-cooling can be achieved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of ground transportation, and particularly to a self-cooling multiphase mixed transportation pump. Background Art

[0002] At the liquid transportation site, there are often mixed media such as oil, water, and gas, and in addition, solid impurities such as sand grains. Under such working conditions, when using a conventional transportation pump for transportation, the following problems exist: (1) If the incoming liquid contains a large amount of gas, due to the low vacuum degree in the pump body, it is extremely easy to cause the transportation to be interrupted; (2) If the incoming liquid contains solid impurities such as sand grains, it is easy to cause wear of the key parts inside the transportation pump, especially the key parts with mating seals, thereby affecting the overall service life.

[0003] On the other hand, from the analysis of specific pump types: taking the screw axial flow pump as an example, its structure is complex and the rotational speed is very high. When in use, it is necessary to cool the rotating parts separately. Once the temperature exceeds the applicable range, it is easy to damage the vulnerable parts, resulting in frequent replacement of the vulnerable parts, and the maintenance difficulty is large and the reliability is poor; taking the rotor pump as an example, its mating parts are composite materials, which belong to flexible mating seals, with good sealing performance, and at the same time have a certain tolerance to solid impurities such as sand grains, but it can work for a short time and cannot be used for a long time, otherwise it is easy to wear, resulting in a reduction in pump efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a self-cooling multiphase mixed transportation pump to solve the problems existing in the above-mentioned prior art, achieve reliable transportation and self-cooling, and extend the service life.

[0005] To achieve the above purpose, the present invention provides the following solution: The present invention provides a self-cooling multiphase mixed transportation pump, including an outer shell, an action module, and an inlet and outlet module. A cooling cavity and at least one pumping cavity are provided inside the outer shell. A liquid inlet and a liquid outlet are provided on the cooling cavity. The liquid inlet is used for the produced liquid to enter the cooling cavity, and the liquid outlet communicates with the inlet end of the inlet and outlet module. The outlet ends of the inlet and outlet module are all communicated with a drainage port. The inlet and outlet module is located outside the outer shell, the action module is located inside the outer shell, and the action module passes through the cooling cavity. The action end of the action module is located in the pumping cavity. When the action module acts, it can drive the produced liquid to enter the cooling cavity through the liquid inlet, and make the produced liquid in the cooling cavity reach the inlet and outlet module through the liquid outlet, and discharge the produced liquid through the drainage port.

[0006] In one embodiment, there are two pumping chambers, which are respectively located on both sides of the cooling chamber. The middle part of the action module passes through the cooling chamber, and both ends of the action module are respectively located in the two pumping chambers.

[0007] In one embodiment, the action module includes a piston mover and a pump barrel stator, and the piston mover and the pump barrel stator form a linear drive motor. The cooling chamber is an annular chamber, and the pump barrel stator forms the inner wall of the annular chamber. The piston mover includes an intermediate shaft and two sliding plates. The two sliding plates are fixed to both ends of the intermediate shaft. The intermediate shaft passes through the pump barrel stator, and there is a seal between the outer wall of the intermediate shaft and the inner wall of the pump barrel stator. The sliding plates are slidably connected to the pumping chambers, and there is a seal between the outer circumference of the sliding plates and the inner walls of the pumping chambers.

[0008] In one embodiment, limiting steps are provided at both ends of the pumping chamber, and the limiting steps can limit the sliding plates.

[0009] In one embodiment, a sealing element is provided on the outer circumference of the sliding plate, and the sealing element can seal between the outer wall of the sliding plate and the inner wall of the pumping chamber.

[0010] In one embodiment, the sealing element is a sealing ring.

[0011] In one embodiment, there are two sets of liquid inlet and outlet modules, and the two sets of liquid inlet and outlet modules correspond to the two pumping chambers one by one. The liquid inlet and outlet modules are installed on the side walls of the pumping chambers.

[0012] In one embodiment, each liquid inlet and outlet module includes two liquid inlet valves and two liquid outlet valves. The two liquid inlet valves are installed on the first side wall of the pumping chamber, and the two liquid outlet valves are installed on the second side wall of the pumping chamber. The first side wall and the second side wall are parallel. The two liquid inlet valves are respectively located on both sides of the sliding plate, and the two liquid outlet valves are respectively located on both sides of the sliding plate. Each liquid inlet valve in the two liquid inlet and outlet modules is located on one side of the intermediate shaft, and each liquid outlet valve in the two liquid inlet and outlet modules is located on the other side of the intermediate shaft. When the sliding plate reciprocates, it can drive each liquid inlet valve to intake liquid and each liquid outlet valve to discharge liquid respectively. The liquid inlet valves and the liquid outlet valves are all one-way valves.

[0013] In one embodiment, the four liquid inlet valves in the two pumping chambers are respectively a first liquid inlet valve, a second liquid inlet valve, a third liquid inlet valve, and a fourth liquid inlet valve, and the four liquid outlet valves in the two pumping chambers are respectively a first liquid outlet valve, a second liquid outlet valve, a third liquid outlet valve, and a fourth liquid outlet valve. The first liquid inlet valve, the second liquid inlet valve, the first liquid outlet valve, and the second liquid outlet valve are located at the same pumping chamber. The third liquid inlet valve, the fourth liquid inlet valve, the third liquid outlet valve, and the fourth liquid outlet valve are located at the same pumping chamber. The first liquid inlet valve and the first liquid outlet valve are located on one side of one of the sliding plates, the second liquid inlet valve and the second liquid outlet valve are located on the other side of one of the sliding plates, the third liquid inlet valve and the third liquid outlet valve are located on one side of the other sliding plate, and the fourth liquid inlet valve and the fourth liquid outlet valve are located on the other side of the other sliding plate. When the sliding plate moves away from the first liquid inlet valve, it can drive the first liquid inlet valve to open, the first liquid outlet valve to close, the second liquid inlet valve to close, the second liquid outlet valve to open, the third liquid inlet valve to open, the third liquid outlet valve to close, the fourth liquid inlet valve to close, and the fourth liquid outlet valve to open. When the sliding plate moves closer to the first liquid inlet valve, it can drive the first liquid inlet valve to close, the first liquid outlet valve to open, the second liquid inlet valve to open, the second liquid outlet valve to close, the third liquid inlet valve to close, the third liquid outlet valve to open, the fourth liquid inlet valve to open, and the fourth liquid outlet valve to close.

[0014] In one embodiment, a liquid inlet pipeline is connected to the liquid inlet, and a liquid outlet pipeline is connected to the liquid outlet.

[0015] The present invention has achieved the following technical effects compared with the prior art: The self-cooling multiphase mixed transportation pump provided by the present invention includes a housing, an action module, and an inlet and outlet liquid module. A cooling chamber and at least one pumping chamber are provided inside the housing. A liquid inlet and a liquid outlet are provided on the cooling chamber. The liquid inlet is used for the produced liquid to enter the cooling chamber, so that the produced liquid first enters the cooling chamber to cool the action module. The liquid outlet is communicated with the inlet end of the inlet and outlet liquid module, so that the produced liquid after heat exchange in the cooling chamber reaches the inlet and outlet liquid module. The outlet ends of the inlet and outlet liquid module are all communicated with a drain port to discharge the produced liquid, realizing the pumping of the produced liquid. The inlet and outlet liquid module is located outside the housing, and the action module is located inside the housing. The action module passes through the cooling chamber to effectively cool the action module through the produced liquid in the cooling chamber, extend the service life, and there is no need to set other supporting cooling equipment, reducing costs and improving the reliability of transportation. The action end of the action module is located in the pumping chamber, so that the action of the action module can act on the produced liquid in the pipeline, and through the produced liquid acting on the inlet and outlet liquid module, the pumping of the produced liquid is realized. At the same time, a sealed friction pair is formed between the action module and the pumping chamber, which can improve the vacuum degree, improve the adaptability to slug flow, and the adaptability to impurities such as sand grains, reduce wear of key parts, and extend the service life. When the action module acts, it can drive the produced liquid to enter the cooling chamber through the liquid inlet, and make the produced liquid in the cooling chamber reach the inlet and outlet liquid module through the liquid outlet, and discharge the produced liquid through the drain port, realizing the pumping of the produced liquid, and the overall structure is simple and the floor area is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the self-cooling multiphase mixed transportation pump in the present invention; Figure 2 It is a schematic structural diagram of the action module in the present invention; In the figure: 1 - housing, 2 - cooling chamber, 3 - pumping chamber, 4 - liquid inlet, 5 - liquid outlet, 6 - drain port, 7 - pump barrel stator, 8 - piston rotor, 9 - sealing element, 10 - limiting step, 11 - first inlet valve, 12 - second inlet valve, 13 - third inlet valve, 14 - fourth inlet valve, 15 - first outlet valve, 16 - second outlet valve, 17 - third outlet valve, 18 - fourth outlet valve, 19 - intermediate shaft, 20 - slide plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] 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 a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] The object of the present invention is to provide a self-cooling multiphase mixing and transporting pump to solve the problems existing in the prior art, realize reliable transportation, realize self-cooling, and extend the service life.

[0020] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] As Figure 1 - Figure 2 shown, this embodiment provides a self-cooling multiphase mixing and transporting pump, which includes an outer housing 1, an action module, and an inlet and outlet liquid module. A cooling cavity 2 and at least one pumping cavity 3 are provided inside the outer housing 1. A liquid inlet 4 and a liquid outlet 5 are provided on the cooling cavity 2. The liquid inlet 4 is used for the produced liquid to enter the cooling cavity 2, so that the produced liquid first enters the cooling cavity 2 to cool the action module. The liquid outlet 5 is communicated with the liquid inlet end of the inlet and outlet liquid module, so that the produced liquid after heat exchange in the cooling cavity 2 reaches the inlet and outlet liquid module. The liquid outlet ends of the inlet and outlet liquid module are all communicated with a drain port 6 to discharge the produced liquid, realizing the pumping of the produced liquid. The inlet and outlet liquid module is located outside the outer housing 1, and the action module is located inside the outer housing 1, and the action module passes through the cooling cavity 2 to effectively cool the action module through the produced liquid in the cooling cavity 2, extend the service life, and there is no need to set other supporting cooling equipment, reduce costs, and improve the reliability of transportation. The action end of the action module is located in the pumping cavity 3, so that the action of the action module can act on the produced liquid in the pipeline, and through the produced liquid acting on the inlet and outlet liquid module, the pumping of the produced liquid is realized. At the same time, a sealed friction pair is formed between the action module and the pumping cavity 3, which can improve the vacuum degree, improve the adaptability to slug flow, and the adaptability to impurities such as sand grains, reduce wear of key parts, and extend the service life. When the action module acts, it can drive the produced liquid to enter the cooling cavity 2 through the liquid inlet 4, and make the produced liquid in the cooling cavity 2 reach the inlet and outlet liquid module through the liquid outlet 5, and discharge the produced liquid through the drain port 6, realizing the pumping of the produced liquid, and the overall structure is simple and the floor area is small.

[0022] As a preferred embodiment, the pumping cavity 3 in this embodiment is provided with two, and the two pumping cavities 3 are respectively located on both sides of the cooling cavity 2, and the middle part of the action module passes through the cooling cavity 2, and both ends of the action module are respectively located in the two pumping cavities 3, so as to realize the pumping of the produced liquid through the cooperation of both ends of the action module and the two pumping cavities 3 respectively, and improve the pumping efficiency.

[0023] The motion module includes a piston mover 8 and a pump barrel stator 7. As a preferred embodiment, the piston mover 8 is made of permanent magnetic material, and three-phase electromagnetic coils are provided at the pump barrel stator 7, so that the piston mover 8 and the pump barrel stator 7 form a linear drive motor. This enables the self-cooling multiphase mixing and transporting pump in this embodiment to not only pump the produced fluid but also provide power for itself as a linear drive motor, with a compact overall structure. The cooling cavity 2 is an annular cavity that surrounds the outer periphery of the motion module and can provide effective cooling. The pump barrel stator 7 forms the inner wall of the annular cavity, improving the cooling and heat transfer effect. The piston mover 8 includes an intermediate shaft 19 and two slide plates 20. The two slide plates 20 are fixed to both ends of the intermediate shaft 19. The intermediate shaft 19 passes through the pump barrel stator 7, so that the intermediate shaft 19 can be cooled within the pump barrel stator 7. At the same time, through the cooperation of the pump barrel stator 7 and the intermediate shaft 19, the reciprocating movement of the intermediate shaft 19 and the slide plates 20 is realized. The outer wall of the intermediate shaft 19 is sealed with the inner wall of the pump barrel stator 7 to prevent the produced fluid from flowing here. The slide plates 20 are slidably connected to the pumping cavity 3, and the outer ring of the slide plates 20 is sealed with the inner wall of the pumping cavity 3. Thus, through the reciprocating movement of the slide plates 20, the pressure change in the chambers on both sides of the slide plates 20 is realized, and the pumping of the produced fluid is achieved. At the same time, the distance between the slide plates 20 and the ends of the pumping cavity 3 can be made small enough to facilitate the discharge of the gas on both sides of the slide plates 20, ensuring the vacuum degree, thereby improving the pump efficiency and having good applicability to slug flow, enabling the self-cooling multiphase mixing and transporting pump to operate reliably for a long time.

[0024] Limit steps 10 are provided at both ends of the pumping cavity 3. The limit steps 10 can limit the slide plates 20, that is, an annular recessed part is formed on the outer walls at both ends of the pumping cavity 3, and the limit steps 10 are formed on the side walls of the recessed part, so that the slide plates 20 can be limited after moving to the left and right in place. As a preferred embodiment, each liquid inlet end and each liquid outlet end of the liquid inlet and outlet module are installed in the recessed part.

[0025] A sealing element 9 is provided on the outer periphery of the slide plates 20. The sealing element 9 can seal between the outer wall of the slide plates 20 and the inner wall of the pumping cavity 3, improving the sealing effect and reducing the leakage amount between the outer wall of the slide plates 20 and the inner wall of the pumping cavity 3.

[0026] The sealing element 9 is a sealing ring. Those skilled in the art can select a suitable sealing element 9 according to actual needs, as long as it can seal between the outer wall of the slide plates 20 and the inner wall of the pumping cavity 3. The sealing ring is in interference fit with the inner wall of the pumping cavity 3, thus effectively reducing the leakage amount between the outer wall of the slide plates 20 and the inner wall of the pumping cavity 3, and also preventing sand particles from entering the gap and causing wear to the whole.

[0027] To adapt to the setting of the two pumping chambers 3, there are two sets of liquid inlet and outlet modules in this embodiment, and the two sets of liquid inlet and outlet modules correspond to the two pumping chambers 3 one by one. The liquid inlet and outlet modules are installed on the side walls of the pumping chambers 3 and can open and close the corresponding positions of the liquid inlet and outlet modules through the reciprocating movement of the slide plate 20 in the pumping chambers 3.

[0028] Each liquid inlet and outlet module includes two liquid inlet valves and two liquid outlet valves. The two liquid inlet valves are installed on the first side wall of the pumping chamber 3, and the two liquid outlet valves are installed on the second side wall of the pumping chamber 3. The first side wall and the second side wall are parallel, and the first side wall and the second side wall are respectively located on both sides of the intermediate shaft 19. The two liquid inlet valves are respectively located on both sides of the slide plate 20, and the two liquid outlet valves are respectively located on both sides of the slide plate 20. Each liquid inlet valve in the two liquid inlet and outlet modules is located on one side of the intermediate shaft 19, and each liquid outlet valve in the two liquid inlet and outlet modules is located on the other side of the intermediate shaft 19. Thus, the chamber on one side of the slide plate 20 corresponds to one liquid inlet valve and one liquid outlet valve, and the chamber on the other side of the slide plate 20 corresponds to the other liquid inlet valve and the other liquid outlet valve, ensuring that when the slide plate 20 reciprocates, it can act on the two liquid inlet valves located on different sides and the two liquid outlet valves located on different sides respectively to realize liquid inlet and outlet. The liquid inlet valves and the liquid outlet valves are both one-way valves, ensuring the correct flow direction of the extracted liquid to realize the smooth pumping of the extracted liquid. At the same time, the structure is simple and convenient to replace.

[0029] As a specific embodiment, the four liquid inlet valves in the two pumping chambers 3 are respectively the first liquid inlet valve 11, the second liquid inlet valve 12, the third liquid inlet valve 13, and the fourth liquid inlet valve 14, and the four liquid outlet valves in the two pumping chambers 3 are respectively the first liquid outlet valve 15, the second liquid outlet valve 16, the third liquid outlet valve 17, and the fourth liquid outlet valve 18. The first liquid inlet valve 11, the second liquid inlet valve 12, the first liquid outlet valve 15, and the second liquid outlet valve 16 are located in the same pumping chamber 3, and the third liquid inlet valve 13, the fourth liquid inlet valve 14, the third liquid outlet valve 17, and the fourth liquid outlet valve 18 are located in the same pumping chamber 3. Moreover, the first liquid inlet valve 11 and the first liquid outlet valve 15 are located on one side of one slide plate 20, the second liquid inlet valve 12 and the second liquid outlet valve 16 are located on the other side of one slide plate 20, the third liquid inlet valve 13 and the third liquid outlet valve 17 are located on one side of the other slide plate 20, and the fourth liquid inlet valve 14 and the fourth liquid outlet valve 18 are located on the other side of the other slide plate 20; when the intermediate shaft 19 drives the slide plate 20 to move away from the first liquid inlet valve 11 under the action of the pump barrel stator 7 (i.e., Figure 1When moving from left to right in the middle), at this time, the pressure in the chamber on the left side of the slide plate 20 decreases, while the pressure in the chamber on the right side of the slide plate 20 increases. As a result, the first liquid inlet valve 11 opens, the first liquid outlet valve 15 closes, the second liquid inlet valve 12 closes, the second liquid outlet valve 16 opens, the third liquid inlet valve 13 opens, the third liquid outlet valve 17 closes, the fourth liquid inlet valve 14 closes, and the fourth liquid outlet valve 18 opens. At this time, the extracted liquid enters the cooling chamber 2 through the liquid inlet port 4, and is discharged from the cooling chamber 2 through the liquid outlet port 5, then passes through the first liquid inlet valve 11 and the third liquid inlet valve 13, and enters the chamber on the left side of the slide plate 20. The extracted liquid in the chamber on the right side of the slide plate 20 is discharged through the second liquid outlet valve 16 and the fourth liquid outlet valve 18, and finally discharged through the liquid discharge port 6; when the intermediate shaft 19 drives the slide plate 20 to move towards the direction close to the first liquid inlet valve 11 under the action of the pump barrel stator 7 (i.e., Figure 1 When moving from right to left in the middle), at this time, the pressure in the chamber on the left side of the slide plate 20 increases, while the pressure in the chamber on the right side of the slide plate 20 decreases. As a result, the first liquid inlet valve 11 closes, the first liquid outlet valve 15 opens, the second liquid inlet valve 12 opens, the second liquid outlet valve 16 closes, the third liquid inlet valve 13 closes, the third liquid outlet valve 17 opens, the fourth liquid inlet valve 14 opens, and the fourth liquid outlet valve 18 closes. At this time, the extracted liquid enters the cooling chamber 2 through the liquid inlet port 4, and is discharged from the cooling chamber 2 through the liquid outlet port 5, then passes through the second liquid inlet valve 12 and the fourth liquid inlet valve 14, and enters the chamber on the right side of the slide plate 20. The extracted liquid in the chamber on the left side of the slide plate 20 is discharged through the first liquid outlet valve 15 and the third liquid outlet valve 17, and finally discharged through the liquid discharge port 6. By reciprocating in this way, the cooling flow rate of the incoming liquid is matched with the running speed of the piston mover 8, and the running environment temperature of the piston mover 8 is adjusted at any time, with good on-site adaptability.

[0030] A liquid inlet pipeline is connected to the liquid inlet port 4, and a liquid discharge pipeline is connected to the liquid discharge port 6.

[0031] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A self-cooling multiphase mixed flow pump, characterized in that: The invention comprises an outer shell, an action module and an inlet and outlet liquid module, wherein a cooling cavity and at least one pumping cavity are arranged in the outer shell, and a liquid inlet and a liquid outlet are arranged on the cooling cavity, wherein the inlet liquid is used for the produced liquid to enter the cooling cavity, and the liquid outlet is connected to the liquid inlet end of the inlet and outlet liquid module, and the liquid outlet ends of the inlet and outlet liquid module are both connected to a liquid discharge port, the liquid inlet and outlet liquid module is located outside the outer shell, the action module is located inside the outer shell, and the action module passes through the cooling cavity, and the action end of the action module is located in the pumping cavity, and when the action module is actuated, it can drive the produced liquid to enter the cooling cavity through the inlet liquid, and make the produced liquid in the cooling cavity reach the inlet and outlet liquid module through the liquid outlet, and make the produced liquid be discharged through the liquid discharge port.

2. The self-cooling multiphase mixed flow pump according to claim 1, characterized in that: There are two pumping chambers, which are respectively located on both sides of the cooling chamber, and the middle of the action module passes through the cooling chamber, and both ends of the action module are respectively located in the two pumping chambers.

3. The self-cooling multiphase mixed flow pump according to claim 2, characterized in that: The action module includes a piston mover and a pump barrel stator, and the piston mover and the pump barrel stator form a linear drive motor. The cooling chamber is an annular chamber, and the pump barrel stator forms the inner wall of the annular chamber. The piston mover includes an intermediate shaft and two slides, and the two slides are fixed at both ends of the intermediate shaft. The intermediate shaft passes through the pump barrel stator, and the outer wall of the intermediate shaft is sealed with the inner wall of the pump barrel stator. The slide is slidably connected in the pumping chamber, and the outer ring of the slide is sealed with the inner wall of the pumping chamber.

4. The self-cooling multiphase mixed flow pump according to claim 3, characterized in that: Both ends of the pumping chamber are provided with limiting steps, and the limiting steps can limit the position of the slide plate.

5. The self-cooling multiphase mixed flow pump according to claim 3, characterized in that: A circle of sealing elements is arranged on the outer periphery of the slide plate, and the sealing elements can seal between the outer wall of the slide plate and the inner wall of the pumping chamber.

6. The self-cooling multiphase mixed flow pump according to claim 5, characterized in that: The sealing element is a sealing ring.

7. The self-cooling multiphase mixed flow pump according to claim 3, characterized in that: There are two groups of liquid inlet and outlet modules, and the two groups of liquid inlet and outlet modules correspond to the two pumping chambers one by one, and the liquid inlet and outlet modules are installed on the side walls of the pumping chambers.

8. The self-cooling multiphase mixed flow pump according to claim 7, characterized in that: Each of the liquid inlet and outlet modules includes two liquid inlet valves and two liquid outlet valves, the two liquid inlet valves are installed on the first side wall of the pumping chamber, and the two liquid outlet valves are installed on the second side wall of the pumping chamber, the first side wall and the second side wall are parallel, the two liquid inlet valves are respectively located on both sides of the slide plate, and the two liquid outlet valves are respectively located on both sides of the slide plate, each of the liquid inlet valves in the two liquid inlet and outlet modules is located on one side of the intermediate shaft, and each of the liquid outlet valves in the two liquid inlet and outlet modules is located on the other side of the intermediate shaft, when the slide plate moves back and forth, it can drive each of the liquid inlet valves to inlet liquid and each of the liquid outlet valves to discharge liquid, and the liquid inlet valve and the liquid outlet valve are both one-way valves.

9. The self-cooling multiphase mixed flow pump according to claim 8, characterized in that: The four liquid inlet valves in the two pumping chambers are respectively a first liquid inlet valve, a second liquid inlet valve, a third liquid inlet valve and a fourth liquid inlet valve, the four liquid outlet valves in the two pumping chambers are respectively a first liquid outlet valve, a second liquid outlet valve, a third liquid outlet valve and a fourth liquid outlet valve, the first liquid inlet valve, the second liquid inlet valve, the first liquid outlet valve and the second liquid outlet valve are located in the same pumping chamber, the third liquid inlet valve, the fourth liquid inlet valve, the third liquid outlet valve and the fourth liquid outlet valve are located in the same pumping chamber, and the first liquid inlet valve and the first liquid outlet valve are located on one side of one of the slides, the second liquid inlet valve and the second liquid outlet valve are located on the other side of one of the slides, and the third liquid inlet valve and the third liquid outlet valve are located on the other side of the slides. on one side of one of the slides, and the fourth liquid inlet valve and the fourth liquid outlet valve are located on the other side of the other slide; when the slide moves in the direction away from the first liquid inlet valve, it can drive the first liquid inlet valve to open, the first liquid outlet valve to close, the second liquid inlet valve to close, the second liquid outlet valve to open, the third liquid inlet valve to open, the third liquid outlet valve to close, the fourth liquid inlet valve to close, and the fourth liquid outlet valve to open; when the slide moves in the direction close to the first liquid inlet valve, it can drive the first liquid inlet valve to close, the first liquid outlet valve to open, the second liquid inlet valve to open, the second liquid outlet valve to close, the third liquid inlet valve to close, the third liquid outlet valve to open, the fourth liquid inlet valve to open, and the fourth liquid outlet valve to close.

10. The self-cooling multiphase mixed flow pump according to claim 1, characterized in that: The liquid inlet is connected to a liquid inlet pipeline, and the liquid discharge outlet is connected to a liquid discharge pipeline.

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