Novel magnetic suspension self-priming pump

Abstract

The utility model provides a novel magnetic suspension self-priming pump which comprises a motor, a pump body, a rotor and a pump cover. A first pump cavity is formed in the pump body, and the rotor is arranged in the first pump cavity in a suspended and non-contact mode. The pump cover is provided with a first inlet used for liquid inflow and a second inlet used for water filling or air exhausting. A water outlet section is arranged above the first pump cavity, and an outlet for liquid to flow out is formed in the water outlet section; a first gas-liquid separation cavity is arranged between the first pump cavity and the outlet, a second pump cavity and a second gas-liquid separation cavity are arranged on the pump cover, the first gas-liquid separation cavity and the second gas-liquid separation cavity form a gas-liquid separation chamber, and the first pump cavity and the second pump cavity form a pump body delivery chamber, so that the volume of the gas-liquid separation chamber is increased, the gas-liquid separation effect is improved, and the service life of the pump body is prolonged. And gas residues in the pump body delivery chamber and the gas-liquid separation chamber cannot be caused, the content of bubbles in liquid in the pump can be reduced, and the pump can keep stable lift and flow.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic levitation pumps, and in particular to a novel magnetic levitation self-priming pump. Background Art

[0002] The magnetic levitation self-priming pump is a magnetic levitation pump with self-priming function. Its characteristic is that after starting, it does not need to fill the water inlet pipe with water in advance or use external force to draw a vacuum. Instead, it relies on its own design characteristics to discharge the air in the pump chamber and suck in the liquid whose level is lower than the pump body and lift it to the required height.

[0003] When the magnetic levitation self-priming pump starts working, the liquid will mix with the gas in the pump cavity and the pipe connected to the inlet to form a gas-liquid mixture. Too much gas in the gas-liquid mixture will affect the pump's head and flow stability. If the separated gas is not discharged in time, it will form air resistance in the pump, reduce the pump's water absorption capacity and liquid delivery efficiency, and prolong the time required for the pump to self-prime, which is not conducive to the pump maintaining a stable head and flow output.

[0004] Therefore, it is necessary to set a gas-liquid separation chamber to improve the effect of gas and liquid separation. In the prior art, due to the thickness of the pump body in the direction of the rotor rotation axis, the volume of the gas-liquid separation chamber is usually small, resulting in poor gas-liquid separation effect, resulting in a high bubble content in the liquid in the pump, affecting the self-priming performance of the pump. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a new type of magnetic levitation self-priming pump, including a motor, a pump body, a rotor and a pump cover; a first pump chamber is formed in the pump body, the rotor is suspended and non-contactly arranged in the first pump chamber, the motor is arranged on one side of the pump body, and the pump cover is arranged on the other side of the pump body; the pump cover is provided with a first inlet for liquid inflow and a second inlet for filling or exhausting; a water outlet node is provided above the first pump chamber, and an outlet for liquid outflow is provided on the water outlet node; a first gas-liquid separation chamber is provided between the first pump chamber and the outlet, a second pump chamber and a second gas-liquid separation chamber are provided on the pump cover, the first gas-liquid separation chamber and the second gas-liquid separation chamber form a gas-liquid separation chamber, and the first pump chamber and the second pump chamber form a pump body extrusion chamber; the pump body extrusion chamber and the gas-liquid separation chamber are connected to each other.

[0006] In some embodiments of the present application, a baffle is provided in the gas-liquid separation chamber.

[0007] In some embodiments of the present application, an extension direction of the first inlet is parallel to the rotation axis of the rotor, and an extension direction of the second inlet is perpendicular to an extension direction of the first inlet.

[0008] In some embodiments of the present application, a first flow channel and a second flow channel are further provided in the pump cover; the first flow channel is interconnected with the first inlet and the second inlet; one end of the second flow channel is connected to the first flow channel, and the other end is connected to the second pump chamber; the first inlet, the second inlet, the first flow channel, the second flow channel, the pump body extrusion chamber, the gas-liquid separation chamber and the outlet form a liquid circulation channel.

[0009] In some embodiments of the present application, a first solenoid valve is provided on the second inlet, and the first solenoid valve is used to control the opening and closing of the second inlet.

[0010] In some embodiments of the present application, a third flow channel is provided on the water outlet node, a second solenoid valve is provided in the third flow channel, and the second solenoid valve is used to control the opening and closing of the third flow channel.

[0011] In some embodiments of the present application, the outlet includes a first water outlet chamber, a second water outlet chamber, and a third water outlet chamber that are sequentially interconnected, and the first water outlet chamber is interconnected with the first gas-liquid separation chamber.

[0012] In some embodiments of the present application, the first inlet is located above the rotation axis of the rotor.

[0013] In some embodiments of the present application, along the radial direction of the rotor, the cross-sectional shapes of the pump body extrusion chamber and the gas-liquid separation chamber are convex polygons.

[0014] In some embodiments of the present application, the cross-sectional shape of the pump body extrusion chamber and the gas-liquid separation chamber is a water drop shape.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects: in the new magnetic levitation self-priming pump of the present application, a first gas-liquid separation chamber is provided on the pump body, a second gas-liquid separation chamber is provided on the pump cover, and a gas-liquid separation chamber is formed between the first gas-liquid separation chamber and the second separation chamber. In this way, the volume of the gas-liquid separation chamber is increased, and the gas-liquid separation effect is improved. No gas residue will be caused in the pump body extrusion chamber and the gas-liquid separation chamber. The bubble content in the liquid in the pump can be reduced, the possibility of cavitation is reduced, and the pump maintains a stable head and flow rate.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of this document are used to provide a further understanding of this document. The exemplary embodiments and descriptions of this document are used to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0018] Figure 1This is a front view of a novel magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0019] Figure 2 It is a left view of a novel magnetic suspension self-priming pump provided by an exemplary embodiment of the present application;

[0020] Figure 3 It is a rear view of a novel magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0021] Figure 4 is a top view of a novel magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0022] Figure 5 It is a partial cross-sectional view of the front view of a novel magnetic levitation self-priming pump provided by an exemplary embodiment of the present application;

[0023] Figure 6 It is a partial cross-sectional view of the left side view of a novel magnetic levitation self-priming pump provided by an exemplary embodiment of the present application;

[0024] Figure 7 is a partial cross-sectional view of a front view of a pump body provided by an exemplary embodiment of the present application;

[0025] Figure 8 is a sectional view of a left side view of a pump body provided by an exemplary embodiment of the present application;

[0026] Fig. 9 is a rear view of a pump cover provided by an exemplary embodiment of the present application;

[0027] Fig.10 It is a sectional view of a left side view of a pump cover provided by an exemplary embodiment of the present application.

[0028] In the figure:

[0029] 10. Motor; 20. Pump body; 201. Water outlet section; 2011. First water outlet chamber; 2012. Second water outlet chamber; 2013. Third water outlet chamber; 202. First pump chamber; 203. First gas-liquid separation chamber; 204. Second solenoid valve; 205. Baffle; 206. Third flow channel; 207. Outlet; 30. Pump cover; 301. First inlet; 302. Second inlet; 303. First flow channel; 304. Second flow channel; 305. First solenoid valve; 306. Second gas-liquid separation chamber; 307. Annular boss; 308. Second pump chamber; 40. Rotor. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0031] When the magnetic levitation self-priming pump starts working, the liquid will mix with the gas in the pump cavity and the pipe connected to the inlet to form a gas-liquid mixture. Too much gas in the gas-liquid mixture will affect the pump's head and flow stability. If the separated gas is not discharged in time, it will form air resistance in the pump, reduce the pump's water absorption capacity and liquid delivery efficiency, and prolong the time required for the pump to self-prime, which is not conducive to the pump maintaining a stable head and flow output.

[0032] Therefore, it is necessary to set a gas-liquid separation chamber to improve the effect of gas and liquid separation. In the prior art, due to the thickness of the pump body in the direction of the rotor rotation axis, the volume of the gas-liquid separation chamber is usually small, resulting in poor gas-liquid separation effect, resulting in a high bubble content in the liquid in the pump, affecting the self-priming performance of the pump.

[0033] Based on this, an exemplary embodiment of the present application provides a new type of magnetic levitation self-priming pump, in which a first gas-liquid separation chamber is provided on the pump body, and a second gas-liquid separation chamber is provided on the pump cover, and a gas-liquid separation chamber is formed between the first gas-liquid separation chamber and the second separation chamber. In this way, the volume of the gas-liquid separation chamber is increased, and the gas-liquid separation effect is improved. No gas residue will be caused in the pump body extrusion chamber and the gas-liquid separation chamber, and the bubble content in the liquid in the pump can be reduced, the possibility of cavitation is reduced, and the pump maintains a stable head and flow rate.

[0034] An exemplary embodiment of the present application provides a novel magnetic suspension self-priming pump, such as Figures 1 to 6As shown, the novel magnetic suspension self-priming pump comprises a motor 10, a pump body 20, a rotor 40 and a pump cover 30; a first pump chamber 202 is formed in the pump body 20, the rotor 40 is suspended and non-contactly arranged in the first pump chamber 202, the motor 10 is arranged on one side of the pump body 20, and the pump cover 30 is arranged on the other side of the pump body 20; a first inlet 301 for liquid inflow and a second inlet 302 for filling or exhausting are arranged on the pump cover 30; a water outlet node 201 is arranged above the first pump chamber 202, The outlet node 201 is provided with an outlet 207 for liquid outflow; a first gas-liquid separation chamber 203 is provided between the first pump chamber 202 and the outlet 207; a second pump chamber 308 and a second gas-liquid separation chamber 306 are provided on the pump cover 30; the first gas-liquid separation chamber 203 and the second gas-liquid separation chamber 306 form a gas-liquid separation chamber, which increases the volume of the gas-liquid separation chamber and improves the gas-liquid separation effect; the first pump chamber 202 and the second pump chamber 308 form a pump body extrusion chamber, and the pump body extrusion chamber and the gas-liquid separation chamber are interconnected. In this way, the volume of the gas-liquid separation chamber is increased, the gas-liquid separation effect is improved, and no gas residue is caused in the pump body extrusion chamber and the gas-liquid separation chamber, which can reduce the bubble content in the liquid in the pump, reduce the possibility of cavitation, and enable the pump to maintain a stable head and flow rate.

[0035] Along the radial direction of the rotor 40, the cross-sectional shape of the pump body extrusion chamber and the gas-liquid separation chamber is a convex polygon. In this way, while increasing the volume of the gas-liquid separation chamber, the manufacturing difficulty of the pump body 20 and the water outlet section 201 will not be increased, so that the pump body 20 and the water outlet section 201 can be designed as an integrated whole, avoiding the problem of later installation trouble caused by the separate design of the pump body 20 and the water outlet section 201.

[0036] like Figure 7 As shown, a baffle 205 is provided in the gas-liquid separation chamber. At the initial stage of starting the magnetic levitation self-priming pump, the gas and liquid in the pump body 20 will flow toward the outlet 207 together. At this time, the baffle 205 can effectively block the upward movement of the liquid and allow the liquid to fall back, allowing the gas to flow to the outlet 207 first, so as to accelerate the separation between the gas and the liquid, increase the effect of gas-liquid separation, prevent a large number of bubbles from appearing in the pumped liquid, prevent the generation of local high pressure and vibration, and maintain a stable flow output and a stable head. The location of the baffle 205 is related to the direction of liquid flow, such as Figure 7 As shown in FIG. 1 , when the liquid rotates in the direction of the arrow in the figure, the baffle 205 is set at a position as shown in FIG. Figure 7 As shown in Figure 7 When the arrow direction is opposite, the baffle 205 is set Figure 7 Of course, baffles 205 may be provided on both sides of the gas-liquid separation chamber, and a channel for liquid and gas to pass through is reserved in the middle of the two baffles 205.

[0037] Continue to refer Figure 7 The cross-sectional shape of the pump body extrusion chamber and the gas-liquid separation chamber is a convex polygon, which includes a large arc segment at the bottom, a small arc segment at the top, and a first connecting segment and a second connecting segment connecting the large arc segment and the small arc segment. When processing the pump body 20 and the pump cover 30, the dimensions of the large arc segment, the small arc segment, the first connecting segment and the second connecting segment can be pre-set on the processing machine tool, and then the pump body 20 and the pump cover 30 can be processed, so that the pump has a large-capacity gas-liquid separation chamber while reducing the production difficulty of the pump; at the same time, the cross-sectional shape of the pump body extrusion chamber and the gas-liquid separation chamber is a convex polygon, so that a standard circular sealing ring can be used to seal between the pump body 20 and the pump cover 30, without the need to use a specially designed sealing ring for sealing, thereby improving the standardization of the pump and reducing the production difficulty of the pump.

[0038] Preferably, the cross-sectional shape of the pump body extrusion chamber and the gas-liquid separation chamber is a water drop shape. The water drop shape design makes the connection between the pump body extrusion chamber and the gas-liquid separation chamber smooth, and the gas can flow into the gas-liquid separation chamber along the side wall of the pump body extrusion chamber, and finally flow out through the outlet 207. At this time, since the connection between the pump body extrusion chamber and the gas-liquid separation chamber is smooth, the gas can be completely discharged along the inner wall of the pump body extrusion chamber and the gas-liquid separation chamber, and no gas residue will be caused in the pump body extrusion chamber and the gas-liquid separation chamber, so that the pump maintains a stable head and flow rate.

[0039] The extension direction of the first inlet 301 is parallel to the rotation axis of the rotor 40, and the first inlet 301 is located above the rotation axis of the rotor 40. For the convenience of description, the extension direction of the first inlet 301 is defined as the horizontal direction of the pump; the second inlet 302 is arranged on one side of the first inlet 301, and the extension direction of the second inlet 302 is perpendicular to the extension direction of the first inlet 301, and the extension direction of the second inlet 302 is defined as the vertical direction of the pump, and the first inlet 301 and the second inlet 302 are connected to each other. In this way, before the initial start or restart after a long shutdown, the liquid poured into the pump body extrusion chamber can flow into the pump body extrusion chamber under the action of gravity. At the same time, the height of the second inlet 302 is much higher than the height of the pump body extrusion chamber, and the liquid level of the liquid poured into the pump body extrusion chamber through the second inlet 302 can reach the height of the first inlet 301. At this time, there is no need to pour liquid into the pipeline connected to the first inlet 301, and the self-priming process can be started.

[0040] like Fig.10As shown, the pump cover 30 is also provided with a first flow channel 303 and a second flow channel 304; the first flow channel 303 is interconnected with the first inlet 301 and the second inlet 302; one end of the second flow channel 304 is connected with the first flow channel 303, and the other end is connected with the second pump body extrusion chamber 308; the first inlet 301, the second inlet 302, the first flow channel 303, the second flow channel 304, the pump body extrusion chamber, the gas-liquid separation chamber and the outlet 207 form a liquid circulation channel. Before the pump works, it is first necessary to fill the pump body extrusion chamber with liquid through the second inlet 302 to start the self-priming process of the pump. After the rotor 40 rotates, under the action of centrifugal force, the rotating impeller pushes the liquid to the outlet 207, and a low-pressure area is formed in the center of the impeller, which forms a pressure difference with the liquid level at the first inlet 301. Therefore, the liquid is continuously sucked into the pump body extrusion chamber from the first inlet 301.

[0041] like Figure 6 As shown, a U-shaped flow channel is formed between the first flow channel 303, the second flow channel 304, the pump body extrusion chamber, the gas-liquid separation chamber and the outlet 207. Therefore, when liquid is poured into the pump body extrusion chamber through the second inlet 302, the liquid levels on one side of the pump body extrusion chamber and the gas-liquid separation chamber can be maintained at the same horizontal plane as the liquid level on one side of the first flow channel 303. Since the heights of the second inlet 302 and the first inlet 301 are much higher than the height of the pump body extrusion chamber, it becomes extremely simple and easy to pour a certain amount of liquid into the pump body extrusion chamber to start the self-priming process of the pump.

[0042] An annular boss 307 is provided in the second pump chamber 308, so that the second flow channel 304 is partially extended into the second pump chamber 308. The extended second flow channel 304 is closer to the inlet of the impeller on the rotor 40, so that the liquid is more easily sucked into the impeller. At the same time, the annular boss 307 can separate the second pump chamber 308 and the second gas-liquid separation chamber 306, thereby improving the gas-liquid separation effect.

[0043] like Fig. 9 As shown, along the radial direction of the rotor 40, the cross-sectional shape of the second pump chamber 308 and the second gas-liquid separation chamber 306 is a convex polygon. In order to ensure the convenience of processing and assembly, the cross-sectional shape of the second pump chamber 308 and the second gas-liquid separation chamber 306 is consistent with the cross-sectional shape of the first pump chamber 202 and the first gas-liquid separation chamber 203.

[0044] Along the radial direction of the rotor 40 , in order to ensure the convenience of processing and assembly, the cross-sectional shape of the second pump chamber 308 and the second gas-liquid separation chamber 306 is a teardrop shape, which is consistent with the cross-sectional shape of the first pump chamber 202 and the first gas-liquid separation chamber 203 .

[0045] like Figure 6As shown, a first solenoid valve 305 is provided on the second inlet 302, and the first solenoid valve 305 is used to control the opening and closing of the second inlet 302. In order to facilitate the filling of liquid into the pump body pressure chamber and realize the self-priming process of the pump, the first solenoid valve 305 is provided on the second inlet 302, and the first solenoid valve 305 can be connected to an external pipeline or a water tank. The first solenoid valve 305 can be a one-way valve. Under the control of the control system, the first solenoid valve 305 can only be unidirectionally conducted, so that the liquid can only flow into the second inlet 302 from the external pipeline.

[0046] In one embodiment, if Figure 1 and 5 As shown, the water outlet node 201 is provided with a third flow channel 206, and the third flow channel 206 is provided with a second solenoid valve 204, and the second solenoid valve 204 is used to control the opening and closing of the third flow channel 206. The second solenoid valve 204 can be unidirectionally conducted, and under the control of the control system, the second solenoid valve 204 can be conducted from the outlet 207 to the outside. Before the initial start or restart after a long shutdown, a certain amount of liquid needs to be poured into the pump body pressure chamber to start the self-priming process of the pump. During the process of pouring liquid, if there is an object blocking the outlet 207 at the outlet 207, it will be difficult to pour liquid into the pump body pressure chamber because the gas in the pump body pressure chamber cannot be discharged. At this time, the control system controls the second solenoid valve 204 to open, and the gas in the pump body pressure chamber is discharged through the third flow channel 206, so as to realize the pouring of liquid into the pump body pressure chamber and realize the self-priming process of the pump.

[0047] Based on the above embodiment, the second solenoid valve 204 can be connected to an external water tank. At this time, the second solenoid valve 204 can be bidirectionally conducted. When it is necessary to inject liquid into the pump body extrusion chamber, the control system controls the second solenoid valve 204 to conduct from the water tank side to the outlet 207 side, so that the liquid in the water tank is injected into the pump body extrusion chamber. At the same time, if the outlet 207 is blocked, the control system can control the second solenoid valve 204 to conduct from the outlet 207 side to the water tank side, and the gas in the pump body extrusion chamber can be discharged into the water tank through the third flow channel 206. When the injection is completed, the control system controls the second solenoid valve 204 to close, and the pump operates normally; at this time, the control system can control the second solenoid valve 204 to conduct from the outlet 207 side to the water tank side. Since the pressure in the pump body extrusion chamber is greater than the pressure in the water tank, the liquid in the pump body extrusion chamber can flow back to the water tank to replenish the water tank and realize the circulation of the liquid in the water tank.

[0048] In one embodiment, the outlet 207 includes a first water outlet chamber 2011, a second water outlet chamber 2012, and a third water outlet chamber 2013 that are sequentially connected to each other, and the first water outlet chamber 2011 is connected to the first gas-liquid separation chamber 203 to form a flow channel for liquid and gas to flow out. Preferably, the diameter of the first water outlet chamber 2011 is smaller than the diameter of the third water outlet chamber 2013, and in this case, the first water outlet chamber 2011 can achieve the function of controlling the flow rate.

[0049] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0050] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the intention of the present application also includes these modifications and variations.

Claims

1. A new type of magnetic levitation self-priming pump, characterized in that: It includes a motor, a pump body, a rotor and a pump cover; a first pump chamber is formed in the pump body, the rotor is suspended and non-contactedly arranged in the first pump chamber, the motor is arranged on one side of the pump body, and the pump cover is arranged on the other side of the pump body; the pump cover is provided with a first inlet for liquid inflow and a second inlet for filling or exhausting; a water outlet node is provided above the first pump chamber, and an outlet for liquid outflow is provided on the water outlet node; a first gas-liquid separation chamber is provided between the first pump chamber and the outlet, a second pump chamber and a second gas-liquid separation chamber are provided on the pump cover, the first gas-liquid separation chamber and the second gas-liquid separation chamber form a gas-liquid separation chamber, and the first pump chamber and the second pump chamber form a pump body extrusion chamber; the pump body extrusion chamber and the gas-liquid separation chamber are communicated with each other.

2. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: A baffle is arranged in the gas-liquid separation chamber.

3. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: An extending direction of the first inlet is parallel to a rotation axis of the rotor, and an extending direction of the second inlet is perpendicular to an extending direction of the first inlet.

4. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: A first flow channel and a second flow channel are also provided in the pump cover; the first flow channel is interconnected with the first inlet and the second inlet; one end of the second flow channel is connected with the first flow channel, and the other end is connected with the second pump chamber; the first inlet, the second inlet, the first flow channel, the second flow channel, the pump body extrusion chamber, the gas-liquid separation chamber and the outlet form a liquid circulation channel.

5. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: The second inlet is provided with a first solenoid valve, and the first solenoid valve is used to control the opening and closing of the second inlet.

6. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: The water outlet node is provided with a third flow channel, and a second electromagnetic valve is provided in the third flow channel. The second electromagnetic valve is used to control the opening and closing of the third flow channel.

7. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: The outlet comprises a first water outlet chamber, a second water outlet chamber and a third water outlet chamber which are sequentially connected to each other, and the first water outlet chamber is connected to the first gas-liquid separation chamber.

8. The novel magnetic levitation self-priming pump according to claim 3 is characterized in that: The first inlet is located above the rotation axis of the rotor.

9. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: Along the radial direction of the rotor, the cross-sectional shapes of the pump body extrusion chamber and the gas-liquid separation chamber are convex polygons.

10. The novel magnetic levitation self-priming pump according to claim 1 is characterized in that: The cross-sectional shapes of the pump body extrusion chamber and the gas-liquid separation chamber are water drop shapes.

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