CN211778032U - Multistage centrifugal pump with self-suction function - Google Patents

Abstract

The utility model discloses a multistage centrifugal pump of function is inhaled from inhaling in area, including the motor and the pump body, the pump body is in the front end of motor, sets up circuit control device at the top of motor, the pump body includes the pump case, set up the multistage impeller be connected with the pivot of motor in the pump case, set up the cover of intaking at the entrance position of multistage impeller and set up the play water cover at the exit position of multistage impeller, the water inlet cavity that the cover of intaking formed link up with the water inlet of the pump body, and the delivery port that goes out the water cavity that the water cover formed link up with the pump body, it is equipped with the backward flow hole to go out between water cavity and the water inlet cavity, the backward flow hole is in the bottom of a water cavity, and is equipped with in the backward flow hole from inhaling. The utility model discloses a multistage centrifugal pump of function is inhaled in area, it has realized from inhaling the function to make the wholeness ability of centrifugal pump promote.

Description

Multistage centrifugal pump with self-suction function

Technical Field

The utility model relates to a multistage centrifugal pump of function is inhaled from area.

Background

The existing centrifugal pump does not have a self-suction function, the whole function is single, the automatic control degree is low, and in addition, the existing centrifugal pump also has the following defects: 1. the mechanical sealing structure and the rotating shaft are low in assembly concentricity and poor in operation stability; 2. the bearing on the rotating shaft is easy to loosen with a bearing groove in the motor shell, so that the centrifugal pump is unstable in operation; 3. the unreasonable layout among all functional components leads to the unattractive appearance, the incompact structure and the large volume.

Disclosure of Invention

The utility model aims to solve the technical problem that a multistage centrifugal pump of function is inhaled from in area is provided, it has realized from inhaling the function to make the wholeness ability of centrifugal pump promote.

In order to solve the technical problem, the utility model relates to a multistage centrifugal pump of function is certainly inhaled in area's technical solution does:

the utility model discloses a multistage centrifugal pump of function is inhaled from area, including the motor and the pump body, the pump body is in the front end of motor, sets up circuit control device at the top of motor, the pump body includes the pump case, set up the multistage impeller be connected with the pivot of motor in the pump case, set up the cover of intaking of the entrance position of multistage impeller and set up the play water cover at the exit position of multistage impeller, the water inlet cavity that the cover of intaking formed link up with the water inlet of the pump body, and the delivery port that goes out the water cavity that the water cover formed link up with the pump body, it is equipped with the backward flow hole to go out between water cavity and the water inlet cavity, the backward flow hole is in the bottom of a water cavity, and is equipped with in the backward flow hole from inhaling the.

The self-priming valve comprises a valve core and a spring, wherein the valve core comprises a sealing cap and a guide rod arranged at the top end of the sealing cap, a sealing ring is arranged on the outer peripheral surface of the sealing cap, the sealing cap can seal a backflow hole, the spring is arranged on the guide rod, the lower end of the spring is abutted against the sealing cap, the upper end of the spring is abutted against a guide seat, the guide seat is provided with a guide hole, the upper end of the guide rod penetrates through the guide hole, an opening and a convex ring are arranged at the upper end of the guide rod, and the outer diameter of the convex ring is larger than the aperture of the guide hole.

The mechanical sealing structure comprises a movable ring fixing support, an extrusion spring, a movable ring, a stationary ring and a stationary ring fixing seat which are sleeved on the rotating shaft, the extrusion spring and the movable ring are sequentially inserted into a groove of the movable ring fixing support, one end of the extrusion spring abuts against the inner wall of the groove of the movable ring fixing support, and the other end of the extrusion spring abuts against the movable ring; a sealing ring is arranged between the inner wall of the movable ring and the rotating shaft; the movable ring fixing bracket is provided with a spline hole, and the rotating shaft is provided with a spline shaft corresponding to the spline hole; the static ring is arranged in the static ring fixing seat, and the static ring is matched with the dynamic ring to form a friction pair.

The circuit control device comprises a control box, a detection channel arranged in the control box and a controller assembly arranged in the control box, wherein one end of the detection channel is provided with a pressure switch, the other end of the detection channel is connected with a five-way pipe arranged at a water inlet of the pump body and communicated with the five-way pipe, the detection channel is further communicated with a pressure tank, and the pressure tank is positioned at the top end of the center of the control box.

A first connecting port, a second connecting port, a third connecting port and a fourth connecting port are formed on the five-way pipe, a first flange and a second flange are respectively arranged on the first connecting port and the second connecting port, the first connecting port is matched with a water inlet of the pump body, and the first flange is fixedly connected with the pump body through the matching of screws and screw holes; the second connector is communicated with the detection channel, the second flange is fixedly connected with the control box through screws and nuts, the third connector is provided with a flow sensor, and the fourth connector is connected with an external municipal pipeline.

The pressure switch comprises a shell, a silica gel gasket, a pressure spring, a support plate and an adjusting screw rod, wherein the silica gel gasket is of a rotary structure and comprises a middle piece and an annular piece arranged on the outer peripheral surface of the middle piece, at least two annular ribs are arranged on the upper surface and the lower surface of the annular piece respectively and are arranged concentrically, and a thickening piece is arranged on the upper surface and the lower surface of the center of the middle piece respectively.

The water inlet of the pump body is provided with an annular inserting plate matched with the first connecting port, the bottom surface of the first flange is provided with a sealing ring, a base plate is arranged on the inner surface of the pump shell opposite to the first flange, and a screw penetrates through the base plate and a mounting hole of the pump shell and is in threaded connection with a screw hole of the first flange.

Two symmetrical through holes are formed in the second flange, nut grooves are formed in the positions, corresponding to the through holes, of the control box, nuts are installed in the nut grooves, and screws penetrate through the through holes and are in threaded connection with the nuts.

The motor is characterized in that a bearing is sleeved on the rotating shaft and is arranged in a bearing groove of a shell of the motor, a pressing plate is further fixed on the shell and is matched with the outer end face of the corresponding bearing.

The clamp plate includes the fixed arm, the pressure arm of being connected with the fixed arm, fixed arm and casing fixed connection, the center of the free end of pressure arm is equipped with dodges the groove, dodges the groove and makes the free end of pressure arm form left pressure ear and right pressure ear.

The utility model has the advantages that:

compared with the prior art, the multi-stage centrifugal pump with the self-priming function is provided with the self-priming valve, so that the centrifugal pump is provided with the self-priming function;

compared with the prior art, the multistage centrifugal pump with the self-absorption function adopts a five-way pipe structure, and the pump body of the water pump, the pressure sensor, the flow switch and the pressure tank can be communicated with the municipal pipeline respectively in an integrated manner, so that the whole centrifugal pump is more compact in structure and more reasonable in layout;

compared with the prior art, the multistage centrifugal pump with the self-absorption function has the advantages that the pressure tank is positioned at the top of the control box, the layout is reasonable, and the appearance is attractive;

compared with the prior art, the multi-stage centrifugal pump with the self-absorption function of the utility model has the advantages that the movable ring fixing support of the mechanical sealing structure is connected and matched with the spline shaft through the spline hole, the synchronous driving operation is more stable, and the concentricity of the spline hole and the spline shaft is better during the assembly;

compared with the prior art, the multi-stage centrifugal pump with the self-priming function has the advantages that the first flange of the five-way pipe is fixedly connected with the pump shell through the screw and the base plate, and the second flange is fixedly connected with the control box through the matching of the screw and the nut, so that the connection of the five-way pipe and the whole centrifugal pump is firmer and more stable, and the assembly positions of all connecting ports of the five-way pipe are more accurate;

compared with the prior art, the utility model discloses a multistage centrifugal pump of function is inhaled from area fills with water in the test passage, has the cooling action to circuit control device, motor.

Drawings

Fig. 1 is an angular perspective view of a multistage centrifugal pump with a self-priming function according to the present invention;

fig. 2 is a perspective view of another angle of the multistage centrifugal pump with self-priming function of the present invention;

fig. 3 is a sectional view of the multistage centrifugal pump with self-priming function of the present invention;

fig. 4 is an angular exploded perspective view of the multistage centrifugal pump with self-priming function of the present invention;

fig. 5 is a perspective exploded view of another angle of the multistage centrifugal pump with self-priming function of the present invention;

fig. 6 is a perspective view of a self-priming valve of the multistage centrifugal pump with self-priming function of the present invention;

fig. 7 is a structural sectional view between a self-priming valve and a pump casing of the multistage centrifugal pump with the self-priming function of the invention;

fig. 8 is a sectional view of the mechanical seal structure of the multistage centrifugal pump with self-priming function of the present invention;

fig. 9 is an exploded perspective view of the mechanical seal structure of the multistage centrifugal pump with self-priming function of the present invention;

fig. 10 is a three-dimensional exploded view of the five-way tube of the multistage centrifugal pump with self-priming function of the present invention;

fig. 11 is a three-dimensional exploded view of the five-way tube, the control box and the pump casing of the multi-stage centrifugal pump with self-priming function of the present invention;

fig. 12 is a sectional view showing the structure of the connection between the five-way pipe and the pump casing of the multistage centrifugal pump with self-priming function according to the present invention;

fig. 13 is a perspective view of a pressure switch of the multistage centrifugal pump with self-priming function of the present invention;

fig. 14 is a sectional view of a pressure switch of the multistage centrifugal pump with self-priming function of the present invention;

fig. 15 is a sectional view showing the structure of a silica gel gasket of a pressure switch of a multistage centrifugal pump with a self-priming function according to the present invention;

fig. 16 is a perspective view of a pressure plate of the multistage centrifugal pump with self-priming function according to the present invention.

Detailed Description

The invention will be described in further detail with reference to the following drawings and detailed description:

please refer to fig. 1 to 16, the utility model provides a multistage centrifugal pump with from inhaling function, including the motor 1 and the pump body 2, the pump body 2 is in the front end of motor 1, sets up circuit control device 3 at the top of motor 1, the pump body 2 includes pump case 4, set up in pump case 4 with the multistage impeller 6 that the pivot 5 of motor 1 is connected, set up the cover 7 of intaking at the inlet position of multistage impeller 6 and set up the play water cover 8 at the exit position of multistage impeller 6, intake chamber 9 that the cover 7 of intaking formed link up with the water inlet 10 of the pump body 2, the play water chamber 11 that the cover 8 of intaking formed link up with the delivery port 12 of the pump body 2, be equipped with backward flow hole 13 between play water chamber 11 and the intake chamber 9, backward flow hole 13 is in the bottom of a water chamber 11, and be equipped with from inhaling valve 14 in backward flow hole 13.

The self-priming valve 14 comprises a valve core 15 and a spring 16, the valve core 15 comprises a sealing cap 17 and a guide rod 18 arranged at the top end of the sealing cap 17, a sealing ring 19 is arranged on the peripheral surface of the sealing cap 17, the sealing cap 17 can seal the backflow hole 13, the spring 16 is arranged on the guide rod 18, the lower end of the spring 16 abuts against the sealing cap 17, the upper end of the spring abuts against a guide seat 20, the guide seat 20 is provided with a guide hole 21, the upper end of the guide rod 18 penetrates through the guide hole 21, an opening 22 and a convex ring 23 are arranged at the upper end of the guide rod 18, and the outer diameter of the convex ring 23 is larger than the aperture of the guide hole 21. During installation, due to the existence of the opening 22 on the guide rod 18, the guide rod 18 can be smoothly inserted into the guide hole 21, and after the guide rod 18 is installed in place, due to the existence of the convex ring 23, the guide rod 18 is matched with the guide hole 21 in place, and the guide rod 18 is not separated from the guide hole 21.

The rotating shaft 5 is provided with a mechanical sealing structure 24, the mechanical sealing structure 24 comprises a movable ring fixing support 25, an extrusion spring 26, a movable ring 27, a stationary ring 28 and a stationary ring fixing seat 29, the movable ring fixing support 25 is sleeved on the rotating shaft 5, the extrusion spring 26 and the stationary ring 27 are sequentially inserted into a groove 30 of the movable ring fixing support 25, one end of the extrusion spring 26 abuts against the inner wall of the groove 30 of the movable ring fixing support 25, and the other end of the extrusion spring abuts against the movable ring 27; a sealing ring 73 is arranged between the inner wall of the movable ring 27 and the rotating shaft 5; a spline hole 31 is formed in the movable ring fixing support 25, and a spline shaft 32 corresponding to the spline hole 31 is arranged on the rotating shaft 5; the static ring 28 is arranged in the static ring fixing seat 29, and the static ring 28 and the dynamic ring 27 are matched to form a friction pair.

The circuit control device 3 comprises a control box 33, a detection channel 34 arranged in the control box 33 and a controller assembly 35 arranged in the control box 33, wherein one end of the detection channel 34 is provided with a pressure switch 36, the other end of the detection channel is connected with a five-way pipe 37 arranged at the water inlet 10 of the pump body 2, the detection channel 34 is further connected with a pressure tank 38 in a penetrating manner, and the pressure tank 38 is positioned at the central top end of the control box 33.

A first connecting port 39, a second connecting port 40, a third connecting port 41 and a fourth connecting port 42 are formed on the five-way pipe 37, a first flange 43 and a second flange 44 are respectively arranged on the first connecting port 39 and the second connecting port 40, the first connecting port 39 is matched with the water inlet 10 of the pump body 2, and the first flange 43 is fixedly connected with the pump body 2 through the matching of a screw 45 and a screw hole 46; the second connecting port 40 is communicated with the detection channel 34, the second flange 44 is fixedly connected with the control box 33 through screws and nuts, the third connecting port 41 is provided with a flow sensor 49, and the fourth connecting port 42 is connected with an external municipal pipeline.

The pressure switch 36 comprises a shell 50, a silica gel gasket 51, a thrust spring 52, a resisting plate 53 and an adjusting screw 54, wherein the silica gel gasket 51 is of a revolving body structure and comprises a middle piece 55 and an annular piece 56 arranged on the outer peripheral surface of the middle piece 55, at least two annular ribs 57 are respectively arranged on the upper surface and the lower surface of the annular piece 56, the at least two annular ribs 57 are concentrically arranged, and a thickening piece 58 is respectively arranged on the upper surface and the lower surface of the center of the middle piece 55.

The silica gel gasket 51 with the structure has the advantages that at least two annular ribs 57 are specially designed, so that the sealing performance between the silica gel gasket and the abutting plate 53 and between the silica gel gasket and the detection channel 34 is better, the thickened piece 58 is additionally arranged at the center of the middle piece 55, the elastic deformation capacity of the middle piece 55 is further improved, the deformation stability and accuracy are improved, and the sensitivity of the pressure switch 36 is higher.

The water inlet 10 of the pump body 2 is provided with an annular insertion plate 59 matched with the first connecting port 39, the bottom surface of the first flange 43 is provided with a sealing ring 74, a backing plate 60 is arranged at the position, opposite to the first flange 43, of the inner surface of the pump shell 4, and a screw 45 penetrates through the backing plate 60 and the mounting hole 61 of the pump shell 4 and is screwed in the screw hole 46 of the first flange 43.

Two symmetrical through holes 62 are formed in the second flange 44, nut grooves 63 are formed in the positions, corresponding to the through holes 62, of the control box 33, nuts are installed in the nut grooves 63, and screws penetrate through the through holes 62 to be screwed with the nuts.

The rotating shaft 5 is sleeved with a bearing 64, the bearing 64 is installed in a bearing groove 66 of a casing 65 of the motor 1, a pressing plate 67 is further fixed on the casing 65, and the pressing plate 67 is matched with the outer end face of the corresponding bearing 64.

The clamp plate 67 includes fixed arm 68, the pressure arm 69 of being connected with fixed arm 68, fixed arm 68 and casing 65 fixed connection, the center of the free end of pressure arm 69 is equipped with dodges the groove 70, dodges the groove 70 and makes the free end of pressure arm 69 form left pressure ear 71 and right pressure ear 72. The avoiding groove 70 just avoids the rotating shaft 5, so that the left pressing lug 71 and the right pressing lug 72 are guaranteed to be pressed against the bearing 64 in a large area, the position of the rotating shaft 5 is avoided, and the rotating shaft 5 is guaranteed to normally work.

The following explanation is made on the working principle of the multistage centrifugal pump with self-suction function of the present invention:

the utility model discloses a take multistage centrifugal pump from inhaling function, the third connector 41 of five-way pipe 37 is connected with municipal pipeline, the domestic pipe is connected to delivery port 12 on the pump body 2, the starter motor 1, pivot 5 drives multistage impeller 6 rotatory, municipal water gets into five-way pipe 37, and flow to detection channel 34 through five-way pipe 37 respectively, the water inlet 10 and the flow inductor 49 of pump body 2, the moisture that flows to detection channel 34 acts on pressure switch 36 and overhead tank 38 respectively, thereby realize pressure switch 36, overhead tank 38, the normal work of flow inductor 49, the water that gets into the pump body 2, the space between full pump case 4 and the cover 7 that intakes, go out the water cover 8, multistage impeller 6, and flow along the direction of cover 7 that intakes, multistage impeller 6, go out water cover 8 and delivery port 12, finally discharge from delivery port 12 with the state of high pressure water, in this process, the centrifugal pump that starts up just, the multistage impeller 6 mainly exists in a mixture of water and air, when the multistage impeller is led to the water outlet cover 8, the air is light and the water is heavy, so that the air outlet 12 is discharged, the water flows into the bottom of the water outlet cover 8, due to the existence of air pressure difference, the self-suction valve 14 is in an open state at the moment, the water at the bottom of the water outlet cover 8 is discharged to the space between the pump shell 4 and the water inlet cover 7, the water outlet cover 8 and the multistage impeller 6 from the backflow hole 13, then enters the water inlet cover 7 again in cycles until all the air is exhausted, at the moment, the water outlet cover 8 is filled with water and is in a vacuum state, the self-suction valve 14 is closed smoothly, the backflow hole 13 is sealed, and therefore the multistage self-suction pump works in a full-water pressure mode.

In the operation process of the centrifugal pump, the movable ring fixing support 25 of the mechanical sealing structure 24 synchronously rotates along with the rotating shaft 5, and the movable ring fixing support 25 and the rotating shaft are in transmission connection through the spline hole 31 and the spline shaft 32, so that the movable ring fixing support 25 obtains stable kinetic energy, and the mechanical sealing structure 24 is helped to realize better sealing.

The multi-stage centrifugal pump with the self-priming function provided by the embodiment of the present invention is described in detail above, and the principle and the implementation mode of the present invention are explained by applying a specific example, and the description of the above embodiment is only used to help understand the technical solution disclosed by the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (10)

1. The utility model provides a multistage centrifugal pump of self-priming function in area, includes the motor and the pump body, its characterized in that: the pump body is arranged at the front end of the motor, the top of the motor is provided with a circuit control device, the pump body comprises a pump shell, a multi-stage impeller, a water inlet cover and a water outlet cover, the multi-stage impeller is arranged in the pump shell and connected with a rotating shaft of the motor, the water inlet cover is arranged at the inlet position of the multi-stage impeller, the water outlet cover is arranged at the outlet position of the multi-stage impeller, a water inlet cavity formed by the water inlet cover is communicated with a water inlet of the pump body, a water outlet cavity formed by the water outlet cover is communicated with a water outlet of the pump body, a backflow hole is arranged between the water outlet cavity and the water inlet cavity and is positioned at the bottom of.

2. The multistage centrifugal pump with self-priming function according to claim 1, characterized in that: the self-priming valve comprises a valve core and a spring, wherein the valve core comprises a sealing cap and a guide rod arranged at the top end of the sealing cap, a sealing ring is arranged on the outer peripheral surface of the sealing cap, the sealing cap can seal a backflow hole, the spring is arranged on the guide rod, the lower end of the spring is abutted against the sealing cap, the upper end of the spring is abutted against a guide seat, the guide seat is provided with a guide hole, the upper end of the guide rod penetrates through the guide hole, an opening and a convex ring are arranged at the upper end of the guide rod, and the outer diameter of the convex ring is larger than the aperture of the guide hole.

3. The multistage centrifugal pump with self-priming function according to claim 1, characterized in that: the mechanical sealing structure comprises a movable ring fixing support, an extrusion spring, a movable ring, a stationary ring and a stationary ring fixing seat which are sleeved on the rotating shaft, the extrusion spring and the movable ring are sequentially inserted into a groove of the movable ring fixing support, one end of the extrusion spring abuts against the inner wall of the groove of the movable ring fixing support, and the other end of the extrusion spring abuts against the movable ring; a sealing ring is arranged between the inner wall of the movable ring and the rotating shaft; the movable ring fixing bracket is provided with a spline hole, and the rotating shaft is provided with a spline shaft corresponding to the spline hole; the static ring is arranged in the static ring fixing seat, and the static ring is matched with the dynamic ring to form a friction pair.

4. The multistage centrifugal pump with self-priming function according to claim 1, characterized in that: the circuit control device comprises a control box, a detection channel arranged in the control box and a controller assembly arranged in the control box, wherein one end of the detection channel is provided with a pressure switch, the other end of the detection channel is connected with a five-way pipe arranged at a water inlet of the pump body and communicated with the five-way pipe, the detection channel is further communicated with a pressure tank, and the pressure tank is positioned at the top end of the center of the control box.

5. The multistage centrifugal pump with the self-priming function according to claim 4, characterized in that: a first connecting port, a second connecting port, a third connecting port and a fourth connecting port are formed on the five-way pipe, a first flange and a second flange are respectively arranged on the first connecting port and the second connecting port, the first connecting port is matched with a water inlet of the pump body, and the first flange is fixedly connected with the pump body through the matching of screws and screw holes; the second connector is communicated with the detection channel, the second flange is fixedly connected with the control box through screws and nuts, the third connector is provided with a flow sensor, and the fourth connector is connected with an external municipal pipeline.

6. The multistage centrifugal pump with the self-priming function according to claim 4, characterized in that: the pressure switch comprises a shell, a silica gel gasket, a pressure spring, a support plate and an adjusting screw rod, wherein the silica gel gasket is of a rotary structure and comprises a middle piece and an annular piece arranged on the outer peripheral surface of the middle piece, at least two annular ribs are arranged on the upper surface and the lower surface of the annular piece respectively and are arranged concentrically, and a thickening piece is arranged on the upper surface and the lower surface of the center of the middle piece respectively.

7. The multistage centrifugal pump with self-priming function according to claim 5, characterized in that: the water inlet of the pump body is provided with an annular inserting plate matched with the first connecting port, the bottom surface of the first flange is provided with a sealing ring, a base plate is arranged on the inner surface of the pump shell opposite to the first flange, and a screw penetrates through the base plate and a mounting hole of the pump shell and is in threaded connection with a screw hole of the first flange.

8. The multistage centrifugal pump with self-priming function according to claim 5, characterized in that: two symmetrical through holes are formed in the second flange, nut grooves are formed in the positions, corresponding to the through holes, of the control box, nuts are installed in the nut grooves, and screws penetrate through the through holes and are in threaded connection with the nuts.

9. The multistage centrifugal pump with self-priming function according to claim 1, characterized in that: the motor is characterized in that a bearing is sleeved on the rotating shaft and is arranged in a bearing groove of a shell of the motor, a pressing plate is further fixed on the shell and is matched with the outer end face of the corresponding bearing.

10. The multistage centrifugal pump with self-priming function according to claim 9, characterized in that: the clamp plate includes the fixed arm, the pressure arm of being connected with the fixed arm, fixed arm and casing fixed connection, the center of the free end of pressure arm is equipped with dodges the groove, dodges the groove and makes the free end of pressure arm form left pressure ear and right pressure ear.

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