CN220505333U

CN220505333U - Self-priming centrifugal pump capable of processing gas-liquid mixed medium

Info

Publication number: CN220505333U
Application number: CN202322149049.0U
Authority: CN
Inventors: 王永康; 王乙; 王玺
Original assignee: Zhejiang Donghang Fire Pump Co ltd
Current assignee: Zhejiang Donghang Fire Pump Co ltd
Priority date: 2023-08-10
Filing date: 2023-08-10
Publication date: 2024-02-20
Anticipated expiration: 2033-08-10

Abstract

The utility model relates to a but self-priming centrifugal pump of processing gas-liquid mixed medium, including the pump body, with pump body coupling's motor, locate the stator in the pump body intake chamber, be equipped with the anti-reflux valve in the intake chamber of the pump body, be equipped with the impeller in the stator inner chamber, the drive shaft and the impeller cooperation of motor, the exhaust chamber has been seted up in the pump body, the pump body top is equipped with the drain pipe, drain pipe intercommunication exhaust chamber and external world, the connecting channel of intercommunication intake chamber bottom and stator inner chamber bottom has been seted up to the inside intercommunication of the pump body. The air pump has the effect of effectively evacuating air in the pump.

Description

Self-priming centrifugal pump capable of processing gas-liquid mixed medium

Technical Field

The utility model relates to the field of centrifugal pumps, in particular to a self-priming centrifugal pump capable of processing a gas-liquid mixed medium.

Background

The utility model patent with publication number of CN115306725A discloses an external mixing type self-priming centrifugal pump, which comprises a pump body, a guide vane arranged in the pump body, an impeller arranged in the inner cavity of the guide vane, and a motor connected to the pump body through a connecting piece, wherein a driving shaft of the motor is matched with the impeller.

The motor is started to drive the impeller to rotate so as to form negative pressure to achieve the effect of self-water absorption, but air in the inner cavity of the guide vane cannot be exhausted in time in the water absorption process, so that liquid in the early stage of water drainage can be sucked into the inner cavity of the guide vane and is mixed with water to form a gas-liquid mixed medium, the flow property of the original liquid is reduced, the efficiency of the pump is reduced, and even the pump is possibly caused to be failed.

Disclosure of Invention

In order to solve the problem that the efficiency of a pump body is reduced due to the gas-liquid mixed medium, the application provides a self-priming centrifugal pump capable of processing the gas-liquid mixed medium.

The self-priming centrifugal pump capable of processing the gas-liquid mixed medium adopts the following technical scheme:

the utility model provides a can handle self-priming centrifugal pump of gas-liquid mixed medium, includes the pump body, with pump body coupling's motor, locates the stator in the pump body intake chamber, be equipped with the anti-reflux valve in the intake chamber of the pump body, be equipped with the impeller in the stator inner chamber, the drive shaft and the impeller cooperation of motor, the exhaust chamber has been seted up in the pump body, the pump body top is equipped with the drain pipe, drain pipe intercommunication exhaust chamber and external world, the connecting channel of intercommunication intake chamber bottom and stator inner chamber bottom has been seted up to the inside of the pump body.

Through adopting above-mentioned technical scheme, after motor drive impeller rotates, can form the negative pressure in the pump body, thereby with liquid from inhaling into the intake cavity, and get rid of into the exhaust cavity through the connecting channel by the impeller, be located the bottom by the connecting channel, therefore liquid can fill full exhaust cavity and intake cavity from the bottom up, in the liquid filling process, the air in the pump body also can be by the discharge pump body, because the drain pipe of the pump body is the highest point of the pump body, consequently, when the liquid finally fills full exhaust cavity and full to the drain pipe, air in the pump body will be completely discharged, thereby produce gas-liquid mixed medium with gaseous mixture when preventing the transportation of liquid medium of follow-up pump body, thereby fundamentally solved gas-liquid mixed medium and caused the problem of pump body efficiency reduction pump.

Preferably, a stop block is arranged on the inner wall of the exhaust cavity, and the stop block is positioned at the bottom of the exhaust cavity and is opposite to the connecting channel.

By adopting the technical scheme, the liquid medium which is conveyed to the exhaust cavity from the connecting channel can be effectively blocked by the arrangement of the stop block, so that the liquid medium which moves at high speed is prevented from scouring the cavity wall of the exhaust cavity, and the situation that the cavity wall is corroded finally causes a break is avoided.

Preferably, one end of the stop block connected with the inner wall of the exhaust cavity is arranged in a tapered manner to one end far away from the inner wall of the exhaust cavity.

By adopting the technical scheme, the stop block can play a role in guiding the movement direction of the liquid medium, and the transverse movement is converted into the upward movement, so that the pump body is assisted to discharge the liquid medium from the drain pipe.

Preferably, the projection of the stop block in the connecting channel completely shields the connecting channel.

By adopting the technical scheme, the stop block is further ensured to prevent the liquid medium from impacting the cavity wall of the exhaust cavity, and meanwhile, the guide effect of the stop block on the movement direction of the liquid medium is also ensured.

Preferably, a first filter screen for filtering impurities is arranged in the water inlet cavity, and the first filter screen is positioned between the water inlet of the water inlet cavity and the backflow prevention valve.

Through adopting above-mentioned technical scheme, the setting of first filter screen prevents that impurity from getting into inside the pump body, causes the damage of pump body impeller etc..

Preferably, the pump body is connected with a U-shaped collecting pipe, the U-shaped collecting pipe is positioned below the first filter screen, two ends of the U-shaped collecting pipe are respectively communicated with the water inlet cavity, two ends of the U-shaped collecting pipe are positioned at one side of the anti-reflux valve close to the water inlet of the water inlet cavity, the first filter screen is obliquely arranged in the water inlet cavity, the distance from the top end of the first filter screen to the anti-reflux valve is larger than the distance from the bottom end of the first filter screen to the anti-reflux valve, the bottom end of the first filter screen extends into one end port of the U-shaped collecting pipe far away from the anti-reflux valve, a second filter screen is arranged in the U-shaped collecting pipe,

through adopting above-mentioned technical scheme, when there is impurity in liquid medium, can be stopped by first filter screen at first, finally enter into U type collecting pipe under liquid medium's washing down and be stopped by the second filter screen to avoid the impurity to pile up at the surface of first filter screen all the time and make the inflow of the pump body decline.

Preferably, the lowest point of the U-shaped collecting pipe is in threaded connection with a screw plug, and the second filter screen is positioned on one side of the screw plug, which is close to the backflow prevention valve.

Through adopting above-mentioned technical scheme, the setting of plug screw makes can clear up the impurity in the U type collecting pipe, prevents to take place to block up in the U type collecting pipe.

The technical effects of the utility model are mainly as follows:

1. according to the utility model, the exhaust cavity and the like are arranged to cooperatively exhaust the air in the pump body, so that the generation of gas-liquid mixed medium during the subsequent transportation of the medium by the pump body is prevented;

2. according to the utility model, the tapered stop block is arranged to effectively block the liquid medium conveyed from the connecting channel to the exhaust cavity, and assist the pump body to discharge the liquid medium from the drain pipe;

3. according to the utility model, impurities are effectively prevented from entering the pump body through the cooperation of the first filter screen, the U-shaped collecting pipe and the second filter screen, and the phenomenon that the impurities are always accumulated on the surface of the first filter screen so that the inflow of the pump body is reduced is avoided.

Drawings

Fig. 1 is a schematic sectional structure of the present embodiment.

Fig. 2 is a partial enlarged view at a in fig. 1.

Fig. 3 is a partial enlarged view at B in fig. 1.

Reference numerals illustrate: 1. a pump body; 11. a water inlet cavity; 12. an exhaust chamber; 13. a connection channel; 2. a motor; 3. a guide vane; 31. an impeller; 4. an anti-reflux valve; 5. a stop block; 6. a first filter screen; 7. a U-shaped collecting pipe; 8. a second filter screen; 9. a screw plug; 10. and (5) a water drain pipe.

Detailed Description

The following description is provided in further detail with reference to the accompanying drawings, so that the technical solutions of the present application are easier to understand and master.

The embodiment of the application discloses a self-priming centrifugal pump capable of processing a gas-liquid mixed medium.

Referring to fig. 1 and 2, a self-priming centrifugal pump capable of processing a gas-liquid mixed medium in this embodiment includes a pump body 1, a motor 2 connected with the pump body 1, a guide vane 3 disposed in a water inlet cavity 11 of the pump body 1, an impeller 31 disposed in an inner cavity of the guide vane 3, and a driving shaft of the motor 2 is matched with the impeller 31. The pump body 1 is equipped with the anti-reflux valve 4 in the inlet chamber 11, and fixedly connected with is used for filtering impurity's first filter screen 6 between inlet chamber 11 water inlet and the anti-reflux valve 4, and first filter screen 6 slope sets up in inlet chamber 11, and the distance of first filter screen 6 top to the anti-reflux valve 4 is greater than the distance of first filter screen 6 bottom to the anti-reflux valve 4.

Referring to fig. 1 and 2, a U-shaped collecting pipe 7 is fixedly connected below the first filter screen 6, wherein two ends of the U-shaped collecting pipe 7 are respectively communicated with a water cavity at one side of the water inlet of the reverse flow valve, which is close to the water inlet cavity 11, the bottom end of the first filter screen 6 stretches into a port at one end of the U-shaped collecting pipe 7, which is far away from the reverse flow valve 4, a screw plug 9 is in threaded connection with the lowest point of the U-shaped collecting pipe 7, and a second filter screen 8 is fixedly connected in one section of the U-shaped collecting pipe 7, which is positioned between the screw plug 9 and the reverse flow valve 4.

Referring to fig. 1 and 2, when impurities exist in the liquid medium, the impurities are blocked by the first filter screen 6, and finally enter the U-shaped collecting pipe 7 and are blocked by the second filter screen 8 under the flushing of the liquid medium, so that the phenomenon that the impurities are always accumulated on the surface of the first filter screen 6 to reduce the water inflow of the pump body 1 is avoided. The screw plug 9 is arranged to clean impurities in the U-shaped collecting pipe 7 and prevent the U-shaped collecting pipe 7 from being blocked.

Referring to fig. 1 and 3, a vent cavity 12 is formed in the pump body 1, a drain pipe 10 is fixedly connected to the top of the pump body 1, the drain pipe 10 is communicated with the vent cavity 12 and the outside, and a connecting channel 13 is formed in the pump body 1 and is communicated with the bottom of the water inlet cavity 11 and the bottom of the inner cavity of the guide vane 3. The pump body 1 is internally provided with a stop block 5 in an integrated manner, the stop block 5 is positioned at the bottom of the exhaust cavity 12 and is opposite to the connecting channel 13, one end, which is connected with the inner wall of the exhaust cavity 12, of the stop block 5 to one end, which is far away from the inner wall of the exhaust cavity 12, is in a tapered shape, the projection of the stop block 5 in the connecting channel 13 completely shields the connecting channel 13, and the stop block 5 is hemispherical.

Referring to fig. 1 and 3, after the motor 2 drives the impeller 31 to rotate, negative pressure is formed in the pump body 1, so that liquid is sucked into the water inlet cavity 11, and is thrown into the air outlet cavity 12 by the impeller 31 through the connecting channel 13, and the air outlet cavity 12 and the water inlet cavity 11 are filled with the liquid from bottom to top by the connecting channel 13, and in the liquid filling process, air in the pump body 1 is also discharged out of the pump body 1, and because the water outlet pipe 10 of the pump body 1 is the highest point of the pump body 1, when the liquid is finally filled with the air outlet cavity 12 and reaches the water outlet pipe 10, the air in the pump body 1 is completely discharged, so that a gas-liquid mixed medium is prevented from being generated when the subsequent pump body 1 conveys the medium. Meanwhile, the stop block 5 is arranged to effectively block the liquid medium which is conveyed from the connecting channel 13 to the exhaust cavity 12, so that the liquid medium moving at high speed is prevented from scouring the cavity wall of the exhaust cavity 12, and finally, the occurrence of cracking caused by erosion of the cavity wall is avoided. .

Of course, the foregoing is merely exemplary of the application, and other embodiments of the application are possible, and all modifications and equivalents of the application are intended to fall within the scope of the application.

Claims

1. The utility model provides a can handle self-priming centrifugal pump of gas-liquid mixed medium, includes pump body (1), motor (2) be connected with pump body (1), locates guide vane (3) in pump body (1) inlet chamber (11), be equipped with in inlet chamber (11) of pump body (1) and prevent against current valve (4), be equipped with impeller (31) in guide vane (3) inner chamber, the drive shaft and the impeller (31) cooperation of motor (2), its characterized in that: the novel air pump is characterized in that an air exhaust cavity (12) is formed in the pump body (1), a drain pipe (10) is arranged at the top of the pump body (1), the drain pipe (10) is communicated with the air exhaust cavity (12) and the outside, and a connecting channel (13) communicated with the bottom of the water inlet cavity (11) and the bottom of the inner cavity of the guide vane (3) is formed in the pump body (1).

2. A self-priming centrifugal pump for treating a mixed gas-liquid medium according to claim 1, wherein: the inner wall of the exhaust cavity (12) is provided with a stop block (5), and the stop block (5) is positioned at the bottom of the exhaust cavity (12) and is opposite to the connecting channel (13).

3. A self-priming centrifugal pump for treating a mixed gas-liquid medium according to claim 2, wherein: one end of the stop block (5) connected with the inner wall of the exhaust cavity (12) is gradually reduced to the end far away from the inner wall of the exhaust cavity (12).

4. A self-priming centrifugal pump for treating a mixed medium of gas and liquid according to claim 3, wherein: the projection of the stop block (5) in the connecting channel (13) completely shields the connecting channel (13).

5. A self-priming centrifugal pump for treating a mixed gas-liquid medium according to claim 1, wherein: the novel water inlet device is characterized in that a first filter screen (6) for filtering impurities is arranged in the water inlet cavity (11), and the first filter screen (6) is positioned between a water inlet of the water inlet cavity (11) and the backflow prevention valve (4).

6. A self-priming centrifugal pump for treating a mixed gas-liquid medium according to claim 5, wherein: the novel water pump is characterized in that a U-shaped collecting pipe (7) is connected to the pump body (1), the U-shaped collecting pipe (7) is located below the first filter screen (6), two ends of the U-shaped collecting pipe (7) are respectively communicated with a water inlet cavity on one side of the water inlet of the reverse flow valve, the first filter screen (6) is obliquely arranged in the water inlet cavity (11), the distance from the top end of the first filter screen (6) to the reverse flow valve (4) is greater than the distance from the bottom end of the first filter screen (6) to the reverse flow valve (4), the bottom end of the first filter screen (6) extends into one end port of the U-shaped collecting pipe (7) away from the reverse flow valve (4), and a second filter screen (8) is arranged in the U-shaped collecting pipe (7).

7. The self-priming centrifugal pump capable of processing gas-liquid mixed media according to claim 6, wherein a screw plug (9) is connected at the lowest point of the U-shaped collecting pipe (7) in a threaded mode, and the second filter screen (8) is located on one side, close to the backflow prevention valve (4), of the screw plug (9).