TWI698590B - Regenerative pump - Google Patents

Abstract

A regenerative pump includes a pump housing, a pump housing cover, an impeller chamber cover and an impeller. The pump housing has a liquid inlet, a liquid outlet, an inner ring wall, and an outer ring wall. The inner ring wall is in the direction of gravity. Separate the upper pressurized flow channel inlet and the lower pressurized flow channel outlet, the pressurized flow channel inlet is connected to the liquid inlet, the impeller chamber cover and the inner ring wall form an impeller chamber, the impeller chamber cover, A gas-liquid separation chamber is formed between the inner ring wall, the outer ring wall and the pump housing cover to communicate between the booster flow channel outlet and the liquid outlet. The impeller is arranged in the impeller chamber and forms a booster pressure between the impeller chamber and the inner ring wall. The flow channel is between the inlet of the pressurized flow channel and the outlet of the pressurized flow channel. The regenerative pump of the present invention can ensure that when the water inlet pipe is short of water, the impeller can still be immersed in the residual water in the pump to maintain a more effective self-priming function.

Description

Regenerative pump

The present invention relates to a regenerative pump, and more particularly relates to a regenerative pump with better self-priming function.

Pumps and fans are both fluid delivery or pressurizing devices. Although the two are similar in mechanical structure and operating principle, the difference in fluid characteristics of water and air prevents most pumps from effectively converting energy to gas and allowing gas to flow. Therefore, in the operation of the pump, water injection before the first installation and operation is very important. The inside of the pump and the water inlet pipe must be filled with water at the same time to ensure that the air is fully discharged in order to perform the normal function of water absorption and pressurization. In addition, in order to prevent the loss of water in the pump and the water inlet pipe during water injection or standby, a check valve must be installed at the inlet of the water inlet pipe to ensure that the water inside the pump and the water inlet pipe will not be siphoned due to the weight of the water during shutdown. Loss of function allows the pump to maintain a normal standby state when it is filled with water at any time, avoiding the trouble of refilling. A little air mixed in the water can be spit out from the pump along with the water flow. However, if the amount of air is so large that the pump cannot discharge enough water, the pump will fail because it cannot eliminate the air. If there is no check valve installed in the water inlet pipe of the pump, or when the water supply is interrupted instantly and there is air in the water inlet pipe, the pump's exhaust capability is the key to reliable operation.

If the pump can use its internal residual water to effectively exert its suction, and then discharge the internal air and restore normal operation without air, this kind of pump with the function of automatically eliminating the air trapped in the water inlet pipe and the pump body is called self-priming (Self-Priming) pump.

Refer to Figure 1, a cross-sectional view of the conventional regenerative pump structure, including the suction port 11, the water inlet passage 12, the impeller chamber 13, the pressurizing flow passage 131, the partition plate 14, the gas-liquid separation chamber 15, the discharge port 16 and the impeller 17 . When the pump is running, water or working fluid enters the pressurized flow channel 131 from the suction port 11 through the water inlet channel 12. The impeller 17 in the impeller chamber 13 produces a high-speed flow, and then enters the gas-liquid separation chamber 15 at the partition plate 14 . The total pressurizing stroke of the pressurizing flow passage 131 needs a sufficient angle to perform an effective pressurizing function.

When the impeller 17 rotates, the liquid located in the tooth groove of the impeller is subjected to the rotating centrifugal force to flow out of the tooth groove and enter the pressurizing flow channel 131 at high speed. The high-speed liquid generates vortex due to the restriction of the flow channel contour, and flows into the impeller tooth groove repeatedly in the flow channel. Each time the liquid passes through a cycle, the pressure will increase once, and finally the water outlet 133 is blocked by the partition plate 14 and does not flow back to the tooth groove of the impeller. When the liquid is discharged, a partial vacuum is formed in the tooth groove of the impeller, and the liquid is sucked into the impeller 17 at the water inlet 132, and the above-mentioned pressurization process is repeated. The number of times that the liquid re-enters the tooth groove for pressurization depends on the pressure load of the pump discharge outlet. The low-lift location requires fewer times of pressure in the tooth groove, so the liquid discharge volume is relatively large. In high-lift places, the number of times required for pressurization in and out of the cogging is more, so the liquid discharge is relatively small.

In order to ensure the normal operation of the regenerative pump after it is stopped and restarted, in addition to installing a check valve at the suction port 11, the conventional regenerative pump is designed with the water inlet 132, the water outlet 133 and the sub The partitions 14 are all located in the upper half of the impeller chamber 13, and the gas-liquid separation chamber 15, the suction port 11 and the discharge port 16 are all disposed above the pump. When the inlet water source is interrupted, the water stored in the booster flow channel 131 will not be completely discharged from the pump by the impeller 17, but the air will be discharged from the gas-liquid separation chamber 15 due to gravity and then pressurized between the impeller 17 and the outer ring wall The flow passage gap 141 partially returns to the pressurized flow passage 131. The backflow water not only has the water ring seal function of isolating the water inlet 132 and the water outlet 133, and its small-stroke circulating suction can gradually attract and discharge the air in the water inlet pipe, and it will return to normal after a period of time. Running. but The conventional regenerative pump only generates backflow through the pressurized flow passage gap 141, so the self-priming capacity generated is limited, and it cannot meet the requirements of higher suction head and fast self-priming performance.

The regenerative self-priming pump disclosed in Japanese Patent Publication No. JP2005248901A has the same structural feature as having a gas-liquid separation chamber higher than the impeller, and a separation baffle and a return hole are provided in the gas-liquid separation chamber. The spit water that has been fully separated from water and gas enters the end of the pressurized flow channel through the return hole, is accelerated by the rotation of the impeller, and then discharged from the spit outlet, which can prevent the return water from containing too much air to affect the self-priming ability. However, because the return hole of the pump is close to the outlet of the impeller, the suction effect generated by the stroke (angle) of the return water recirculation is limited. On the other hand, the pump outlet is set at the bottom, and its internal partition can keep the water from losing, but when a large amount of internal air is accumulated in the upper part of the gas-liquid separation chamber and cannot be automatically discharged, it will eventually cause gas inside the pump. Air-Lock affects the normal operation of the pump.

Therefore, in order to solve various problems of conventional regenerative pumps, the present invention proposes a regenerative pump with better self-priming function.

In order to achieve the above and other objectives, the present invention provides a regenerative pump, which includes: a pump housing with a liquid inlet, a liquid outlet, an inner ring wall and an outer ring wall, the inner ring wall In the direction of gravity, a pressurized flow channel inlet located above and a pressurized flow channel outlet located below are separated in the direction of gravity. The pressurized flow channel inlet communicates with the liquid inlet; a pump housing cover is arranged on the pump housing An accommodating space is formed between one side and the outer ring wall; an impeller accommodating chamber cover is arranged in the accommodating space, an impeller accommodating chamber is formed between the impeller accommodating chamber cover and the inner ring wall, the impeller A gas-liquid separation chamber is formed between the chamber cover, the inner ring wall, the outer ring wall, and the pump housing cover, and the gas-liquid separation chamber is connected between the pressurized flow channel outlet and the liquid outlet; and a The impeller is arranged in the impeller chamber, and a pressurized flow passage is formed between the impeller, the inner ring wall and the impeller chamber cover between the pressurized flow passage inlet and the pressurized flow passage outlet.

In an embodiment of the present invention, the booster flow channel inlet and the booster flow channel outlet are respectively located in the upper half and the lower half of the rotation center of the impeller.

In one embodiment of the present invention, the pressurizing flow passage is a long arc flow passage with a pressurizing stroke exceeding 180 degrees. After the fluid enters the pressurizing flow passage from the inlet of the pressurizing flow passage and is pressurized, The outlet of the pressurized flow channel flows out to enter the gas-liquid separation chamber.

In an embodiment of the present invention, the bottom of the lower half of the inner ring wall is provided with a backflow hole connecting the pressurized flow channel and the gas-liquid separation chamber, and the backflow hole is provided at the outlet of the pressurized flow channel. Upstream and below the outlet of the pressurized flow channel in the direction of gravity.

In an embodiment of the present invention, the gas-liquid separation chamber has at least one horizontal section higher than the return hole.

In an embodiment of the present invention, the pump housing cover includes a coupling seat and a pressure vessel connection through hole, the coupling seat is connected to the outer ring wall of the pump housing, and the pressure vessel connection through hole is connected to the gas-liquid Separation room.

In an embodiment of the present invention, an exhaust hole is provided on the top of the gas-liquid separation chamber.

In an embodiment of the present invention, an exhaust plug is further included in the exhaust hole.

In an embodiment of the present invention, the pump housing further has a diversion wall connected between the inner ring wall and the outer ring wall and located outside the outlet of the pressurizing flow channel.

In an embodiment of the present invention, a check valve member is further included, which is disposed between the liquid inlet and the inlet of the pressurizing flow channel.

In an embodiment of the present invention, the check valve member includes a check plug, a check valve cover, a locking ring, and a water injection plug. The check valve is disposed on the check valve cover and located at the inlet. Liquid port and the Between the inlets of the booster flow channel, the check valve cover is arranged on the locking ring, the locking ring is arranged on the check valve member interface on the top of the pump housing, and the water injection plug is arranged on the check valve cover.

In an embodiment of the present invention, it further includes a motor, which is arranged on the other side of the pump housing, and the rotating shaft of the motor is connected to the impeller.

In an embodiment of the present invention, the pump housing has a liquid outlet channel, and the liquid outlet channel is located between the gas-liquid separation chamber and the liquid outlet.

In an embodiment of the present invention, the inner ring wall and the pump housing are an integral structure or a separate structure, and the outer ring wall and the pump housing are an integral structure or a separate structure.

In an embodiment of the present invention, the residual water surface in the gas-liquid separation chamber is higher than the lowest point of the outlet of the pressurized flow channel.

Thereby, the regenerative pump of the present invention can increase the recirculation ability of residual water in the pump, and can effectively exert the self-priming function of the pump even with only a small amount of water storage.

100: Regenerative pump

11: suction port

12: Inlet channel

13: Impeller chamber

131: pressurized runner

132: Inlet

133: Outlet

14: divider

141: Pressurized runner gap

15: Gas-liquid separation chamber

16: spit out

17: Impeller

2: motor

21: shaft

3: pump housing

31: Liquid inlet

311: Inlet Channel

32: Liquid outlet

321: Outlet Channel

33: inner ring wall

331: Return hole

34: outer ring wall

35: Impeller chamber

351: Pressurized runner inlet

352: pressurized runner

353: pressurized runner outlet

36: Gas-liquid separation chamber

361: Vent

362: Diversion Wall

37: accommodation space

4: impeller

5: Impeller chamber cover

6: Pump housing cover

61: Combination seat

611: Pressure vessel connection through hole

7: Exhaust plug

8: Check valve components

81: stop plug

82: check valve cover

83: water filling plug

84: locking ring

85: Check valve component interface

Figure 1 is a schematic cross-sectional view of a conventional regenerative pump structure.

Figure 2 is an exploded schematic diagram of a regenerative pump according to an embodiment of the present invention.

Fig. 3A is a first schematic diagram of a combination of a regenerative pump according to an embodiment of the present invention.

Fig. 3B is the second schematic diagram of the combination of the regenerative pump according to the embodiment of the present invention.

4 is a schematic cross-sectional view of a regenerative pump according to an embodiment of the present invention.

Figure 5 is a schematic diagram of the operation of the regenerative pump according to an embodiment of the present invention.

In order to fully understand the present invention, the following specific embodiments are used in conjunction with the accompanying drawings to illustrate the present invention in detail. Those skilled in the art can understand the purpose, features and effects of the present invention from the content disclosed in this specification. It should be noted that the present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the spirit of the present invention. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of patent application of the present invention. The description is as follows: As shown in FIGS. 2 to 4, the regenerative pump 100 according to the embodiment of the present invention includes: a pump housing 3, a pump housing cover 6, an impeller chamber cover 5 and an impeller 4.

The pump housing 3 has a liquid inlet 31, a liquid outlet 32, an inner ring wall 33 and an outer ring wall 34. The liquid inlet 31 is located on the side of the top of the pump housing 3, and the liquid outlet 32 is located on the pump housing. At the top of the body 3, the inner ring wall 33 separates a pressurized flow channel inlet 351 located above and a pressurized flow channel outlet 353 located below in the direction of gravity. The pressurized flow channel inlet 351 can pass through the outer ring wall via a pipe 34 is connected to the liquid inlet 31.

The pump housing cover 6 is arranged on one side of the pump housing 3 to form an accommodating space 37 between the outer ring wall 34, the inner ring wall 33 is arranged in the accommodating space 37, and the other side of the pump housing 3 Motor 2 is connected.

The impeller chamber cover 5 is arranged in the accommodating space 37, an impeller chamber 35 is formed between the impeller chamber cover 5 and the inner ring wall 33, the impeller chamber cover 5, the inner ring wall 33, the outer ring wall 34 and the pump casing A gas-liquid separation chamber 36 is formed between the body cover 6, and the gas-liquid separation chamber 36 is connected between the pressurizing flow channel outlet 353 and the liquid outlet 32. In other words, the aforementioned accommodating space 37 is divided by the impeller housing cover 5 and the inner ring wall 33 into the impeller housing chamber 35 (within the impeller housing cover 5 and the inner ring wall 33) and the gas-liquid separation chamber 36 (impeller housing The chamber cover 5 and the inner ring wall 33), the inner ring wall 33 and the pump housing 3 can be an integrated structure or a separate structure, and the outer ring wall 34 and the pump housing 3 It can be a one-piece structure or a separate structure. In addition, the pump housing 3 has a liquid outlet channel 321 located between the gas-liquid separation chamber 36 and the liquid outlet 32, and the liquid outlet channel 321 may be an extension of the gas-liquid separation chamber 36. In an embodiment, the residual water surface in the gas-liquid separation chamber 36 is higher than the lowest point of the pressurized flow channel outlet 353.

The impeller 4 is arranged in the impeller housing 35 and is driven by the rotating shaft 21 of the motor 2 to rotate. A pressurized flow channel 352 is formed between the impeller 4, the inner ring wall 33 and the impeller housing cover 5 between the pressurized flow channel inlet 351 and the pressurized flow channel outlet 353.

When the regenerative pump 100 of the present invention operates for the first time, the pump housing 3 is filled with water first. Sufficient water injection can effectively reduce the air in the regenerative pump 100 and shorten the time required for self-priming operation. When the water injection is completed, the power supply can be turned on to start the regenerative pump 100. The characteristic of the regenerative pump 100 of the present invention is that only a small amount of water is stored inside the pump to effectively discharge the air on the suction side.

As shown in Figure 4, when unexpected air enters the pump housing 3 through the liquid inlet 31, the local water storage in the pump housing 3 can effectively isolate the booster flow channel inlet 351 and the booster flow channel outlet 353 , Forming a water seal effect. When the regenerative pump 100 is running, as shown in Figure 5, if unexpected air enters the pump housing 3 through the liquid inlet 31, the lower half of the impeller 4 is still running in a water-storing environment Therefore, the inlet 351 of the booster flow channel and the outlet 353 of the booster flow channel can be effectively isolated, forming a water seal effect.

Under the action of the rotation of the impeller 4, the liquid near the liquid inlet 31 will be completely sucked into the impeller chamber 35 and present an anhydrous state. The water stored in the pump housing 3 will flow backward into the pressurizing flow channel 352 through the pressurizing flow channel outlet 353 of the pressurizing flow channel 352 for a certain distance, and the stored water will not be completely drained. When the water inlet pipe is short of water and full of air, the impeller 4 can still be immersed in water.

In this way, when the impeller 4 rotates in a clockwise direction (as shown in Fig. 5), the liquid located in the tooth grooves of the outer ring of the impeller 4 starts from the inlet 351 of the pressurized flow channel. The centrifugal force generated by the rotation will enter the liquid The gas in the vicinity of the port 31 is pressurized to form bubbles and is drawn into the pressurized flow passage 352; the bubbles are mixed in the liquid and discharged from the pressurized flow passage outlet 353 to enter the gas-liquid separation chamber 36. Since the bubble is no longer pressurized by the impeller 4 at this time, the bubble can move upward in the gas-liquid separation chamber 36, and then escape from the liquid outlet 32, while the liquid is limited by gravity and stays in the gas-liquid separation chamber 36 Below. Therefore, the liquid can be stored in the pump housing 3, and in this way, the gas in the liquid inlet 31 (and the upstream pipeline) is gradually discharged from the liquid outlet 32 to achieve a highly efficient self-exhausting function.

In addition, when the impeller 4 rotates in a clockwise direction, the liquid located in the tooth grooves of the outer ring of the impeller 4 starts from the inlet 351 of the pressurized flow channel. Due to the interaction of the centrifugal force generated by the rotation and the restraint of the pressurized flow channel 352, Repeated in and out of the tooth groove to gradually increase the pressure, and after being discharged at the outlet 353 of the pressurizing flow channel due to the barrier of the inner ring wall 33, it enters the gas-liquid separation chamber 36, and then flows out of the pump through the liquid outlet channel 321 and the liquid outlet 32. As the pressurized flow channel outlet 353 continuously discharges high-pressure liquid, a negative pressure suction force will be generated at the pressurized flow channel inlet 351. Therefore, when the water inlet pipe is filled with water at the same time without any air, the negative pressure suction can open the check valve at the pump inlet and suck in the same amount of discharged liquid as the booster outlet 353, thus forming a continuous liquid flow.

Further, in one embodiment, as shown in FIGS. 4 and 5, the booster flow channel inlet 351 and the booster flow channel outlet 353 are respectively located in the upper half and the lower half of the rotation center of the impeller 4. When the impeller 4 rotates in a clockwise direction, the liquid can obtain a relatively long pressurizing stroke and exert a pressurizing function.

Further, in one embodiment, as shown in Figs. 4 and 5, the pressurizing flow passage 352 is a long-arc flow passage with a pressurizing stroke exceeding 180 degrees (close to 270 degrees in this embodiment), and the fluid After entering the pressurizing flow channel 352 from the pressurizing flow channel inlet 351 to be pressurized, it flows out from the pressurizing flow channel outlet 353 to enter the gas-liquid separation chamber 36.

Further, in one embodiment, as shown in FIGS. 4 and 5, the bottom of the lower half of the inner ring wall 33 is provided with a backflow hole 331 that communicates with the pressurized flow channel 352 and the gas-liquid separation chamber 36. The return hole 331 is provided upstream of the pressurizing flow channel outlet 353 and located below the pressurizing flow channel outlet 353 in the direction of gravity. As shown in Figure 5, the return hole 331 ensures that the water stored in the gas-liquid separation chamber 36 can pass through the return hole when the water level in the gas-liquid separation chamber 36 is higher than the return hole 331 or the pressurized flow channel outlet 353 when the water level is low. 331 or the outlet 353 of the pressurized flow channel flows back into the pressurized flow channel 352, so that the function of the impeller 4 to entrain the gas can continue to operate. In one embodiment, the gas-liquid separation chamber 36 has at least one horizontal section higher than the return hole 331.

Further, in one embodiment, as shown in FIGS. 2 to 3B, the pump housing cover 6 includes a coupling seat 61 and a pressure vessel connection through hole 611. The coupling base 61 is connected to the outer ring wall 34 of the pump housing 3, and a pressure vessel (not shown) can be connected to the gas-liquid separation chamber 36 through the pressure vessel connection through hole 611 of the coupling base 61 to store water.

Further, in one embodiment, the pump housing 3 further has a diversion wall 362 connected between the inner ring wall 33 and the outer ring wall 34 and located outside the pressurizing flow channel outlet 353. The guide wall 362 can assist the liquid to quickly enter the gas-liquid separation chamber 36 when it is discharged from the pressurized flow channel outlet 353.

Furthermore, in one embodiment, as shown in FIGS. 4 and 5, an exhaust hole 361 is provided at the top of the gas-liquid separation chamber 36. The regenerative pump 100 further includes an exhaust plug 7 and a check valve member 8. The exhaust plug 7 is arranged at the exhaust hole 361, and the check valve member 8 is arranged between the liquid inlet 31 and the booster flow channel inlet 351 The check valve member 8 includes a check plug 81, a check valve cover 82, a locking ring 84 and a water injection plug 83. The check plug 81 is arranged on the check valve cover 82 and is located in the inlet Between the liquid port 31 and the booster flow channel inlet 351, the check valve cover 82 is arranged on the locking ring 84, the locking ring 84 is arranged on the check valve member interface 85 on the top of the pump housing 3, and the water injection plug 83 is arranged on Check valve cover 82.

By simultaneously disassembling the water filling plug 83 and the vent plug 7, fluid can be injected into the pump housing 3, and the air inside the pump housing 3 can be discharged from the original position of the vent hole 361 and the water filling plug 83. After the water injection is completed, the water injection plug 83 and the exhaust plug 7 are respectively locked back by rotation, and the power supply can be turned on to start the regenerative pump 100.

Further, in an embodiment, as shown in FIGS. 2 to 3B, the regenerative pump 100 further includes the aforementioned motor 2, the rotating shaft 21 of which is connected to the impeller 4 to drive the impeller 4 to rotate.

The present invention has been disclosed in the above embodiments. However, those skilled in the art should understand that the embodiments are only used to describe the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiment should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.

100: Regenerative pump

2: motor

21: shaft

3: pump housing

31: Liquid inlet

32: Liquid outlet

33: inner ring wall

331: Return hole

34: outer ring wall

35: Impeller chamber

351: Pressurized runner inlet

353: pressurized runner outlet

36: Gas-liquid separation chamber

361: Vent

362: Diversion Wall

37: accommodation space

4: impeller

5: Impeller chamber cover

6: Pump housing cover

61: Combination seat

611: Pressure vessel connection through hole

85: Check valve component interface

Claims (14)

A regenerative pump comprising: a pump housing with a liquid inlet, a liquid outlet, an inner ring wall and an outer ring wall, the inner ring wall separates a booster located above in the direction of gravity The inlet of the flow channel and the outlet of a pressurized flow channel located below, the inlet of the pressurized flow channel communicates with the liquid inlet; a pump housing cover is arranged on one side of the pump housing and formed between the outer ring wall An accommodating space; an impeller accommodating chamber cover is arranged in the accommodating space, an impeller accommodating chamber is formed between the impeller accommodating chamber cover and the inner ring wall, the impeller accommodating chamber cover, the inner ring wall, the outer A gas-liquid separation chamber is formed between the ring wall and the pump casing cover. The gas-liquid separation chamber is connected between the pressurizing flow channel outlet and the liquid outlet. The residual water surface in the gas-liquid separation chamber is higher than the pressurizing The lowest point of the outlet of the flow path; and an impeller, which is arranged in the impeller chamber. A pressurized flow path is formed between the impeller, the inner ring wall and the cover of the impeller chamber between the inlet of the pressurized flow path and the increase Pressure between the runner outlets. The regenerative pump according to claim 1, wherein the booster flow passage inlet and the booster flow passage outlet are respectively located in the upper half and the lower half of the rotation center of the impeller. The regenerative pump according to claim 1 or 2, wherein the pressurizing flow passage is a long-arc flow passage with a pressurizing stroke exceeding 180 degrees, and the fluid enters the pressurizing flow passage from the inlet of the pressurizing flow passage. After being pressurized, it flows out from the outlet of the pressurized flow channel to enter the gas-liquid separation chamber. The regenerative pump according to claim 1, wherein the bottom of the lower half of the inner ring wall is provided with a return hole connecting the pressurizing flow passage and the gas-liquid separation chamber, and the return hole is arranged at The upstream of the pressurized flow passage outlet and below the pressurized flow passage outlet in the direction of gravity. The regenerative pump according to claim 4, wherein the gas-liquid separation chamber has at least one horizontal section higher than the return hole. The regenerative pump according to claim 1, wherein the pump housing cover includes a coupling seat and a pressure vessel connection through hole, the coupling seat is connected to the outer ring wall of the pump housing, and the pressure vessel connection through hole is connected to The gas-liquid separation chamber. The regenerative pump according to claim 1, wherein an exhaust hole is provided at the top of the gas-liquid separation chamber. The regenerative pump described in claim 7 further includes an exhaust plug provided in the exhaust hole. The regenerative pump according to claim 1, wherein the pump housing further has a diversion wall connected between the inner ring wall and the outer ring wall and located outside the outlet of the pressurizing flow channel . The regenerative pump according to claim 1, further comprising a check valve member arranged in the liquid inlet channel between the liquid inlet and the inlet of the booster flow channel. The regenerative pump according to claim 10, wherein the check valve member includes a check plug, a check valve cover, a locking ring, and a water injection plug, the check plug is disposed on the check valve cover and Located between the liquid inlet and the booster flow channel inlet, the check valve cover is arranged on the locking ring, the locking ring is arranged on the check valve member interface on the top of the pump housing, and the water injection plug is arranged In the check valve cover. The regenerative pump according to claim 1, further comprising a motor, which is arranged on the other side of the pump housing, and the rotating shaft of the motor is connected to the impeller. The regenerative pump according to claim 1, wherein the pump housing has a liquid outlet channel, and the liquid outlet channel is located between the gas-liquid separation chamber and the liquid outlet. The regenerative pump according to claim 1, wherein the inner ring wall and the pump housing are an integral structure or a separate structure, and the outer ring wall and the pump housing are an integral structure or a separate structure.

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