Self-priming pump with eccentric volute

Abstract

The application discloses a self-priming pump with eccentric volute, and particularly relates to the technical field of self-priming pump devices, which comprises a mounting seat, a driver connected with the mounting seat, a water storage chamber fixed on one side of the mounting seat, a volute body fixed on one side of the mounting seat, an impeller fixed on the output end of the driver and located in the inner cavity of the volute body, a water inlet pipe fixed in the inner cavity of the water storage chamber and matched with the volute body, a matching part fixed on one side of the water storage chamber, a sealing flushing part fixed on one side of the matching part, and a flow guide part fixed on one side of the sealing flushing part. The self-priming pump with eccentric volute can improve the exhaust efficiency of the device through the flow guide part, and the gas conveying efficiency to the impeller is improved through the acceleration of the gas and the increase of the flow during the jetting, so that the exhaust time is reduced and the working efficiency of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of self-priming pump devices, in particular to a self-priming pump with an eccentric volute. BACKGROUND

[0002] Self-priming pumps are mainly used for water supply, sewage treatment, agriculture, nursery, tea garden irrigation, forest, urban construction, commercial network fire fighting and other places in industry. It uses gas-liquid mixing principle and special structure of the pump to realize pumping gas, and forms a certain degree of vacuum state in the pump suction pipeline, without the need for other special air extraction devices, except for the first use of water, after each use can no longer be water.

[0003] The prior art CN113007100A discloses a self-priming centrifugal pump with adjustable jet flow, comprising a pump shell provided with a pump cavity inside, a jet flow pipe and a water pressure chamber located in the pump cavity, a backflow hole is arranged on the jet flow pipe, the backflow hole communicates the jet flow pipe and the pump cavity, the water pressure chamber drives the fluid in the pump cavity to flow into the jet flow pipe from the backflow hole, and the pump shell is provided with a valve element, and the valve element can close or open the backflow hole. The valve element can block the backflow hole under large flow to improve the cavitation phenomenon.

[0004] The above device can drive part of the gas to flow towards the impeller during use, but when the length of the water suction pipe is long, the self-priming pump needs a long time to exhaust the air, the preparation time is long, the working efficiency is low, and the position of the backwater during jet flow is also easy to be blocked by impurities in the water. SUMMARY

[0005] The purpose of the present application is to solve the problem that when the length of the water suction pipe is long, the self-priming pump needs a long time to exhaust the air, the preparation time is long, the working efficiency is low, and the position of the backwater during jet flow is also easy to be blocked by impurities in the water, and a self-priming pump with an eccentric volute is proposed.

[0006] In order to achieve the above purpose, the present application adopts the following technical self-priming pump with eccentric volute:

[0007] The installation seat is fixed with a water storage chamber on one side, the installation seat is fixed with a volute body on one side, the drive output end is fixed with an impeller located in the inner cavity of the volute body, the inner cavity of the water storage chamber is fixed with a water inlet pipe matched with the volute body, one side of the water storage chamber is fixed with a matching part, one side of the matching part is fixed with a sealing flushing part, and one side of the sealing flushing part is fixed with a flow guide part.

[0008] The flow guide component includes a Venturi tube one, the inner cavity of the Venturi tube one is fixed with a Venturi tube two through a fixed ring, the inner cavity of the Venturi tube two is fixed with a group of spiral flow guide fins, the outer surface of the Venturi tube one is fixed with an air inlet adjusting component;

[0009] Through the pressure reduction inside the throat of the Venturi tube one, the air outside is extracted, the gas is accelerated once, the high-speed liquid sprayed through the output end of the Venturi tube two makes the gas in the inner cavity of the Venturi tube one accelerated twice, and the gas-liquid mixture through the throat of the Venturi tube one can be accelerated three times.

[0010] Further description of the self-priming pump with eccentric volute as the above technology:

[0011] The outer surface of the water storage chamber is fixed with a water outlet pipe, one side of the water storage chamber is fixed with a water inlet, and the water inlet communicates with the inner cavity of the water inlet pipe.

[0012] Further description of the self-priming pump with eccentric volute as the above technology:

[0013] The matching component includes a groove block fixedly connected with the water storage chamber, one side of the groove block is fixedly connected with an electric push rod, the output end of the electric push rod is fixedly connected with a clamping part, one side of the groove block is fixedly connected with a connecting pipe communicating with the inner cavity of the groove block, and the inner cavity of the groove block is fixedly connected with a flow guide circular plate.

[0014] Further description of the self-priming pump with eccentric volute as the above technology:

[0015] The clamping part includes a connecting rod fixedly connected with the output end of the electric push rod, the outer surface of the connecting rod is fixedly connected with a plurality of inclined rods arranged in an annular array, and one side of the connecting rod is fixedly connected with a T-shaped rod.

[0016] Further description of the self-priming pump with eccentric volute as the above technology:

[0017] The sealing flushing component includes a groove vertical block, one side of the groove vertical block is fixedly connected with a conveying pipe communicating with the inner cavity of the connecting pipe, the inner cavity of the groove of the groove vertical block is fixedly connected with a supporting part, and one side of the supporting part is fixedly connected with an elastic sealing plate.

[0018] Further description of the self-priming pump with eccentric volute as the above technology:

[0019] The elastic sealing plate is matched with the inclined rod, and the inclined rod penetrates through the elastic sealing plate.

[0020] Further description of the self-priming pump with eccentric volute as the above technology:

[0021] The supporting component includes a group of fixing rods fixed to the inner surface of the groove of the groove vertical block, and the group of fixing rods are commonly fixed with a mounting ring, and one side of the mounting ring is fixed with multiple supporting springs in an annular array, and one side of the multiple supporting springs is commonly fixed with a connecting ring, and the connecting ring is fixedly connected to the elastic sealing plate.

[0022] As a further description of the above technology, a self-priming pump with an eccentric volute is provided:

[0023] The guide component includes a venturi tube 1, a venturi tube 2 is fixed to the inner cavity of the venturi tube 1 through a fixing ring, a group of spiral guide plates are fixed to the inner cavity of the venturi tube 2, and an air intake adjustment component is fixed to the outer surface of the venturi tube 1.

[0024] As a further description of the above technology, a self-priming pump with an eccentric volute is provided:

[0025] The air intake regulating component includes an air intake pipe, a conical pipe is fixed on one side of the air intake pipe, a diaphragm is movably installed in the inner cavity of the air intake pipe through a mounting groove, and elastic blocks are fixed on both sides of the diaphragm.

[0026] In summary, due to the use of the above-mentioned technology, a self-priming pump with an eccentric volute has the following beneficial effects:

[0027] 1. The device can improve the exhaust efficiency of the device while jetting through the flow-guiding component, and improve the gas delivery efficiency to the impeller by multiple accelerations of the gas and the increase in flow rate during injection, thereby reducing the exhaust time and improving the working efficiency of the device; the water in the water storage chamber flows through the connecting pipe and the delivery pipe to the second inner cavity of the Venturi tube, and through the Bernoulli principle, the pressure inside the second throat of the Venturi tube is reduced, and the air outside the inner cavity of the intake pipe can be extracted from the inner cavity of the air inlet pipe, thereby accelerating the gas once, and then when the water flow is ejected at high speed from the second output end of the Venturi tube, the air around the second output end of the Venturi tube flows rapidly with the high-speed ejected liquid, thereby accelerating the gas twice, and then the gas-liquid mixture passes through the first throat of the Venturi tube, which is the third acceleration of the gas, and then the gas-liquid mixture ejected at high speed from the first output end of the Venturi tube can carry the gas around the first Venturi tube to flow toward the volute body, thereby increasing the flow rate of the gas and the flow rate.

[0028] 2. This device can block the return water hole under large flow rate through the mutual cooperation between the provided matching parts and the sealing flushing parts, and can also prevent the blockage of the guide parts during the exhaust process; the output end of the electric push rod is moved to make the connecting rod move with the T-shaped rod. During the movement of the connecting rod, multiple inclined rods no longer contact the outer edge of the elastic sealing plate, causing the elastic sealing plate to rebound. At this time, the outer edge of the elastic sealing plate is offset to the side of the supporting part, and then the T-shaped rod pulls the elastic sealing plate to move to the side of the supporting part. At this time, the elastic sealing plate can transport a large amount of water to the groove inner cavity on the groove vertical block. When the elastic sealing plate contacts the groove inner cavity on the groove vertical block, the return water channel can be blocked, and the water pushed by the elastic sealing plate to the inner cavity of the groove vertical block impacts the inner cavity of the connecting pipe and the delivery pipe, which can flush out the blockage. At the same time, when it is necessary to close the return water hole on the groove vertical block, the return water hole on the groove vertical block can also be sealed.

[0029] 3. This device is equipped with a bow-shaped diaphragm, which can achieve the effect of shrinking and deforming the diaphragm and increasing the flow channel area when the flow rate in the intake pipe cavity increases. It is essentially a passive adaptive flow regulating device. When the air in the water storage chamber is discharged, the gas flow in the intake pipe cavity is small and the diaphragm does not deform. When the water storage chamber forms a negative pressure to extract air from the water pipe, the gas flow in the intake pipe cavity increases, causing it to shrink and increase the area of ​​the flow channel in the intake pipe cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It shows a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0031] Figure 2 Shows a partial structural cross-section according to an embodiment of the present invention Figure 1 ;

[0032] Figure 3 Shows a partial structural cross-section according to an embodiment of the present invention Figure 2 ;

[0033] Figure 4 A schematic diagram showing the installation positions of the matching components, the sealing and flushing components, and the flow guide components provided in an embodiment of the present invention is shown;

[0034] Figure 5 It shows a schematic structural diagram of a matching component and a sealing flush component provided in an embodiment of the present invention;

[0035] Figure 6 It shows a schematic structural diagram of a locking component provided in an embodiment of the present invention;

[0036] Figure 7 It shows a schematic structural diagram of a support component provided in an embodiment of the present invention;

[0037] Figure 8 It shows a schematic diagram of the operating state of the matching components and the sealing flushing component provided in an embodiment of the present invention;

[0038] Figure 9 A schematic structural diagram of a flow guide component provided in an embodiment of the present invention is shown;

[0039] Figure 10 The cross-sectional view of the flow guide structure provided by the embodiment of the present invention is shown. Figure 1 ;

[0040] Figure 11 The cross-sectional view of the flow guide structure provided by the embodiment of the present invention is shown. Figure 2 ;

[0041] Figure 12 A diagram showing the gas acceleration flow direction in a flow guide component provided according to an embodiment of the present invention is shown.

[0042] Legend:

[0043] 10. Mounting base; 11. Water storage chamber; 12. Water outlet pipe; 13. Water inlet pipe; 14. Volute body; 15. Impeller;

[0044] 20. Mating component; 21. Groove block; 22. Electric push rod; 23. Connecting pipe; 24. Guide plate; 25. Positioning component; 251. Connecting rod; 252. Slant rod; 253. T-shaped rod;

[0045] 30. Sealing flushing component; 31. Grooved vertical block; 32. Delivery pipe; 33. Support component; 331. Fixing rod; 332. Mounting ring; 333. Support spring; 334. Connecting ring; 34. Elastic sealing plate;

[0046] 40. Flow guide component; 41. Venturi tube 1; 42. Venturi tube 2; 43. Guide vane; 44. Air intake adjustment component; 441. Air intake pipe; 442. Diaphragm; 443. Elastic block; 444. Conical tube. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings to clearly and completely describe the technology of the self-priming pump with an eccentric volute in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] Example 1: Figure 1-Figure 3As shown, a self-priming pump with an eccentric volute includes a mounting base 10 and a driver connected to the mounting base 10, the mounting base 10 is used to fix the driver, and the driver can be a motor. A water storage chamber 11 is fixed to one side of the mounting base 10, and a volute body 14 is fixed to one side of the mounting base 10. The volute body 14 is a double-helix volute, one spiral angle is 90 degrees, and the other spiral angle is 270 degrees. By setting a double outlet, the water output of the pump can be increased, so that the pump has a large flow rate. The output end of the driver is fixed with an impeller 15 located in the inner cavity of the volute body 14, and the inner cavity of the water storage chamber 11 is fixed with a water inlet pipe 13 adapted to the volute body 14. One end of the water inlet pipe 13 is fixedly connected to the water inlet hole of the volute body 14, and water flows directly into the inner cavity of the volute body 14 for output;

[0049] Among them, the outer surface of the water storage chamber 11 is fixed with a water outlet pipe 12, which is communicated with the inner cavity of the water storage chamber 11 and is used for exhaust and water discharge. A water inlet is fixed on one side of the water storage chamber 11, which is communicated with the inner cavity of the water inlet pipe 13;

[0050] Next, a matching component 20 is fixed to one side of the water storage chamber 11, a sealing flushing component 30 is fixed to one side of the matching component 20, and a flow guide component 40 is fixed to one side of the sealing flushing component 30. The matching component 20 and the sealing flushing component 30 are designed to prevent the flow guide component 40 from being blocked, and can automatically control the opening and closing of the return water channel.

[0051] In addition, an anti-blocking block is fixed to the inner cavity of the water storage chamber 11, and the anti-blocking block is located near the sealed flushing component 30. One side of the anti-blocking block is a forty-five-degree slope, so that water flows through the slope toward the side of the sealed flushing component 30. A number of storage tanks are provided on the anti-blocking block, and the storage tanks are provided on the slope of the anti-blocking block. Impurities brought by the water flow can be deposited in the inner cavity of the storage tank, thereby avoiding clogging of the guide component 40 during use.

[0052] Further, if Figure 4 and Figure 5 As shown, the matching component 20 includes a groove block 21 fixedly connected to the water storage chamber 11, an electric push rod 22 is fixed to one side of the groove block 21, and a locking component 25 is fixed to the output end of the electric push rod 22. A connecting pipe 23 communicating with the inner cavity of the groove block 21 is fixed to one side of the groove block 21. The connecting pipe 23 is a pipe for transporting return water to the flow guide component 40;

[0053] Among them, a guide circular plate 24 is fixed in the inner cavity of the groove block 21. One side of the guide circular plate 24 is an arc surface, which is located at the lower side of the connection point between the groove block 21 and the connecting pipe 23. The water flowing into the inner cavity of the connecting pipe 23 through the arc surface of the guide circular plate 24 flows more smoothly.

[0054] Further, if Figure 6As shown, the locking component 25 includes a connecting rod 251 fixed to the output end of the electric push rod 22, and a plurality of annular array inclined rods 252 are fixed to the outer surface of the connecting rod 251. The inclined rods 252 are inclined in design, and a T-shaped rod 253 is fixed to one side of the connecting rod 251.

[0055] Further, if Figure 5 As shown, the sealed flushing component 30 includes a groove vertical block 31. The through groove on the groove vertical block 31 is a return water hole. A delivery pipe 32 communicating with the inner cavity of the connecting pipe 23 is fixed to one side of the groove vertical block 31. A support component 33 is fixed to the inner cavity of the groove of the groove vertical block 31. An elastic sealing plate 34 is fixed to one side of the support component 33.

[0056] The elastic sealing plate 34 is made of elastic metal. When the return water hole on the groove vertical block 31 needs to be opened, the outer side of the elastic sealing plate 34 is offset away from the support member 33, so that the edge is curved to facilitate water flow. When the connecting pipe 23 or the delivery pipe 32 is blocked, the outer side of the elastic sealing plate 34 is offset toward the support member 33. When the connecting rod 251 moves, water is transported to the inner cavity of the groove block 21, and the blockage is cleared by the impact of the water flow.

[0057] Among them, Figure 8 As shown, the elastic sealing plate 34 is adapted to the inclined rod 252, and the inclined rod 252 passes through the elastic sealing plate 34. When the elastic sealing plate 34 is away from the side of the supporting component 33, the inclined rod 252 contacts the edge of one side of the elastic sealing plate 34, pushing the outer side of the elastic sealing plate 34, so that the outer side of the elastic sealing plate 34 is offset to the side away from the supporting component 33. At this time, the T-shaped rod 253 is not in contact with the elastic sealing plate 34. After the inclined rod 252 moves a certain distance, the inclined rod 252 is no longer in contact with the elastic sealing plate 34. At this time, the elastic sealing plate 34 rebounds to a state where the outer edge is offset to the side of the supporting component 33. At this time, the T-shaped rod 253 can pull the elastic sealing plate 34 toward the side of the electric push rod 22, blocking the return water hole on the groove vertical block 31, so as to facilitate the sealing of the return water hole under large flow.

[0058] Further, if Figure 7 As shown, the support component 33 includes a group of fixing rods 331 fixed to the inner surface of the groove of the groove vertical block 31, and the group of fixing rods 331 are commonly fixed with a mounting ring 332. A plurality of support springs 333 in an annular array are fixed on one side of the mounting ring 332. A circular hole for mounting the support spring 333 is opened on one side of the mounting ring 332, so that the support spring 333 can be retracted into the circular hole when compressed. A connecting ring 334 is commonly fixed on one side of the plurality of support springs 333, and the connecting ring 334 is fixedly connected to the elastic sealing plate 34.

[0059] Further, if Figures 9-12As shown, the flow guide component 40 includes a Venturi tube one 41, the inner cavity of the Venturi tube one 41 is fixed with a Venturi tube two 42 through a fixing ring, the output end of the Venturi tube two 42 is located at the contraction part of the Venturi tube one 41, the water flow in the inner cavity of the Venturi tube two 42 can accelerate with the gas in the inner cavity of the Venturi tube one 41, the gas and the liquid are accelerated again at the throat of the Venturi tube one 41, and the gas-liquid mixture can drive the gas around the output end of the Venturi tube one 41 to flow when it is sprayed at the output end of the Venturi tube one 41, so as to improve the discharge efficiency of the gas, the inner cavity of the Venturi tube two 42 is fixed with a group of spiral flow guide vanes 43, the group of flow guide vanes 43 are arranged at the throat of the Venturi tube two 42, which can prevent cavitation from occurring during water spraying, the fluid spirally advances at the throat of the Venturi tube two 42, and the fluid is forced to rotate, so that the pressure gradient at the throat is reorganized, the central pressure is the lowest, cavitation is transferred, and bubbles are broken at the center without damaging the structure of the wall surface.

[0060] Through the decrease of the internal pressure at the throat of the Venturi tube one 41, the air outside is extracted to accelerate the gas once, the high-speed liquid sprayed at the output end of the Venturi tube two 42 accelerates the gas in the inner cavity of the Venturi tube one 41 twice, and the gas-liquid mixture at the throat of the Venturi tube one 41 can be accelerated three times, so as to improve the flow rate of the gas, and the high-speed gas-liquid mixture sprayed at the output end of the Venturi tube one 41 can increase the gas flow around the output end of the Venturi tube one 41, further improving the discharge efficiency of the gas.

[0061] Further, as shown, Figure 11 The outer surface of the Venturi tube one 41 is fixed with an air inlet adjusting component 44, the diaphragm 442 of the air inlet adjusting component 44 can be deformed to shrink and increase the flow passage area when the flow rate increases, the air inlet adjusting component 44 includes an air inlet pipe 441, the air inlet pipe 441 is communicated with the inner cavity of the Venturi tube one 41 and located at the outer side of the throat of the Venturi tube two 42, when the water in the inner cavity of the Venturi tube two 42 flows, the air in the inner cavity of the Venturi tube one 41 can be extracted through the air inlet pipe 441, one side of the air inlet pipe 441 is fixed with a conical pipe 444, the inner cavity of the air inlet pipe 441 is movably installed with the diaphragm 442 through a mounting groove, the diaphragm 442 is arc-shaped, the diaphragm 442 is made of a nickel-titanium shape memory alloy and has super-elastic deformation ability, the edge of the convex part of the diaphragm 442 is thick and the center is thin, so that the deformation starts from the middle, when the flow rate of the gas increases, the diaphragm 442 can be deformed to shrink, so as to increase the flow passage area and further improve the conveying efficiency of the gas, the two sides of the diaphragm 442 are fixed with elastic blocks 443, the elastic blocks 443 are used for installing the diaphragm 442 and buffering the diaphragm 442 to prevent the diaphragm 442 from being damaged by long-term impact.

[0062] It should be noted that the mounting seat 10, water storage chamber 11, impeller 15, electric push rod 22, Venturi tube 1 41 and Venturi tube 2 42 in the present invention are all existing technologies, and their installation methods and control methods are also conventional designs, which will not be elaborated in detail in the present invention.

[0063] The working principle of the present invention is as follows: the device can improve the exhaust efficiency of the device while jetting by providing the guide component 40, thereby reducing the exhaust time and improving the working efficiency of the device;

[0064] During use, the water in the inner cavity of the water storage chamber 11 flows through the connecting pipe 23 and the delivery pipe 32 to the inner cavity of the second venturi tube 42. The Bernoulli principle reduces the pressure inside the throat of the second venturi tube 42, and the air outside can be extracted from the inner cavity of the air inlet pipe 441, thereby accelerating the gas once. Then, when the water is ejected at high speed from the output end of the second venturi tube 42, the air around the output end of the second venturi tube 42 flows rapidly along with the high-speed ejected liquid, thereby accelerating the gas twice. Then, the gas-liquid mixture passes through the throat of the first venturi tube 41, thereby accelerating the gas three times. Then, the gas-liquid mixture ejected at high speed from the output end of the first venturi tube 41 can carry the gas around the first venturi tube 41 to flow toward the volute body 14, thereby increasing the flow rate of the gas and the flow rate, thereby improving the gas discharge efficiency and further improving the working efficiency of the device.

[0065] The device can block the return water hole at a large flow rate by cooperating with the matching component 20 and the sealing flushing component 30, and can also prevent the clogging of the guide component 40 during the exhaust process;

[0066] The output end of the electric push rod 22 moves, so that the connecting rod 251 moves with the T-shaped rod 253. During the movement of the connecting rod 251, the multiple inclined rods 252 no longer contact the outer edge of the elastic sealing plate 34, causing the elastic sealing plate 34 to rebound. At this time, the outer edge of the elastic sealing plate 34 is offset toward the side of the supporting component 33, and then the T-shaped rod 253 pulls the elastic sealing plate 34 to move toward the side of the supporting component 33. At this time, the elastic sealing plate 34 can transport a large amount of water to the groove inner cavity on the groove vertical block 31. When the elastic sealing plate 34 contacts the groove inner cavity on the groove vertical block 31, the return water channel can be blocked. The water pushed by the elastic sealing plate 34 to the inner cavity of the groove vertical block 31 impacts the inner cavity of the connecting pipe 23 and the delivery pipe 32, which can flush the blockage. At the same time, when it is necessary to close the return water hole on the groove vertical block 31, the return water hole on the groove vertical block 31 can also be blocked.

[0067] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technology of the present invention, a self-priming pump with an eccentric volute and its inventive concept, can be equivalently replaced or modified, which should be covered by the scope of protection of the present invention.

Claims

1. A self-priming pump with an eccentric volute, comprising a mounting base (10) and a driver connected to the mounting base (10), characterized in that: A water storage chamber (11) is fixed to one side of the mounting seat (10), a volute body (14) is fixed to one side of the mounting seat (10), an impeller (15) located in the inner cavity of the volute body (14) is fixed to the output end of the driver, a water inlet pipe (13) adapted to the volute body (14) is fixed to the inner cavity of the water storage chamber (11), a matching component (20) is fixed to one side of the water storage chamber (11), a sealing flushing component (30) is fixed to one side of the matching component (20), and a flow guide component (40) is fixed to one side of the sealing flushing component (30); The flow guide component (40) includes a venturi tube 1 (41), a venturi tube 2 (42) is fixed to the inner cavity of the venturi tube 1 (41) via a fixing ring, a group of spiral flow guide plates (43) are fixed to the inner cavity of the venturi tube 2 (42), and an air intake adjustment component (44) is fixed to the outer surface of the venturi tube 1 (41); The matching component (20) includes a groove block (21) fixedly connected to the water storage chamber (11), an electric push rod (22) fixed to one side of the groove block (21), a locking component (25) fixed to the output end of the electric push rod (22), a connecting pipe (23) communicating with the inner cavity of the groove block (21) fixed to one side of the groove block (21), and a guide circular plate (24) fixed to the inner cavity of the groove block (21); The locking component (25) comprises a connecting rod (251) fixed to the output end of the electric push rod (22), a plurality of annular array oblique rods (252) are fixed to the outer surface of the connecting rod (251), and a T-shaped rod (253) is fixed to one side of the connecting rod (251); The sealing flushing component (30) includes a groove vertical block (31), a delivery pipe (32) communicating with the inner cavity of the connecting pipe (23) is fixed on one side of the groove vertical block (31), a support component (33) is fixed in the inner cavity of the groove of the groove vertical block (31), and an elastic sealing plate (34) is fixed on one side of the support component (33), the elastic sealing plate (34) is adapted to the inclined rod (252), and the inclined rod (252) passes through the elastic sealing plate (34); The support component (33) includes a group of fixing rods (331) fixed to the inner surface of the groove of the groove vertical block (31), the group of fixing rods (331) are commonly fixed with a mounting ring (332), one side of the mounting ring (332) is fixed with a plurality of supporting springs (333) in an annular array, and one side of the plurality of supporting springs (333) is commonly fixed with a connecting ring (334), and the connecting ring (334) is fixedly connected to the elastic sealing plate (34); The pressure inside the throat of the first venturi tube (41) is reduced, and the air outside is drawn in, which accelerates the gas once. The high-speed liquid ejected from the output end of the second venturi tube (42) causes the gas in the inner cavity of the first venturi tube (41) to be accelerated twice. The gas-liquid mixture passing through the throat of the first venturi tube (41) can be accelerated three times.

2. A self-priming pump with an eccentric volute according to claim 1, characterized in that: A water outlet pipe (12) is fixed on the outer surface of the water storage chamber (11), and a water inlet is fixed on one side of the water storage chamber (11), wherein the water inlet is in communication with the inner cavity of the water inlet pipe (13).

3. A self-priming pump with an eccentric volute according to claim 1, characterized in that: The air intake regulating component (44) comprises an air intake pipe (441), a conical pipe (444) is fixed to one side of the air intake pipe (441), a diaphragm (442) is movably mounted in the inner cavity of the air intake pipe (441) via a mounting groove, and elastic blocks (443) are fixed on both sides of the diaphragm (442).

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