CN220134202U

CN220134202U - Sealed backflow-preventing centrifugal pump

Info

Publication number: CN220134202U
Application number: CN202321149232.4U
Authority: CN
Inventors: 邵星
Original assignee: Wuxi Dongye Machinery Manufacturing Co ltd
Current assignee: Wuxi Dongye Machinery Manufacturing Co ltd
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2023-12-05
Anticipated expiration: 2033-05-15

Abstract

The utility model discloses a sealed backflow-preventing centrifugal pump, which belongs to the technical field of centrifugal pumps and comprises a pump body and a backflow-preventing device; the pump body comprises a motor, a sealing ring and a connecting cylinder; the pump body is internally provided with a cavity, a side pipe is arranged at the joint of the sealing ring and the rotating shaft, the side pipe is connected with the inside of the cavity, the right side of the sealing ring is provided with a connecting cylinder, the outer side of the connecting cylinder is connected with the sealing ring, a sealing ring is arranged at the joint of the connecting cylinder and the sealing ring for sealing, and a flow guide pipe is arranged on the right side of the connecting cylinder; the sealing ring is arranged on one side of the cavity and used for sealing the cavity, and the side pipe is arranged at the joint of the rotating shaft and the sealing ring and used for radiating friction generated by the rotating shaft; through setting up anti-return device in water inlet department, make the centrifugal pump lose behind motor spindle power, make the sleeve whereabouts through the pressure of spring and liquid and carry out the back stifled, make the cavity in full water, need not to add repeatedly.

Description

Sealed backflow-preventing centrifugal pump

Technical Field

The utility model belongs to the technical field of centrifugal pumps, and particularly relates to a sealed backflow-preventing centrifugal pump.

Background

In the prior art, the centrifugal pump generates high temperature in the rotating process of the impeller and the pump shaft through the suction generated by the high-speed rotation of the fan blades in the cavity of the pump body, the mechanical seal of the centrifugal pump is a rubber seal, the rubber seal is a wearing part, the mechanical seal of the centrifugal pump is damaged easily in a high-temperature environment, the service life of the mechanical seal of the centrifugal pump is shortened, the replacement frequency of the mechanical seal is increased, and secondly, when the centrifugal pump is used, the centrifugal pump needs to be normally used by adding water into the cavity of the centrifugal pump before each use, and the sealing gasket frequency and the manual water adding frequency are improved, so that the manual labor force is increased.

Disclosure of Invention

Based on this, it is necessary to provide a sealed anti-reflux centrifugal pump;

to solve the problems set forth in the background art. The utility model provides the following technical scheme: a sealed backflow-preventing centrifugal pump comprises a pump body and a backflow-preventing device; the pump body comprises a motor, a sealing ring and a connecting cylinder; the inside of the pump body is provided with the cavity, the pivot of motor extends to the cavity inside, sealing ring and cavity bolted connection, the junction of sealing ring and pivot is provided with the side tube, side tube and cavity internal connection, the right side of sealing ring is provided with the connecting cylinder, the inside of connecting cylinder cup joints with the pivot, the outside and the sealing ring of connecting cylinder are connected, the junction of connecting cylinder and sealing ring is provided with the sealing washer and seals, the right side of connecting cylinder is provided with the honeycomb duct, backflow preventer includes No. two sleeves and No. three sleeves, no. two sleeves and No. three sleeve sliding connection.

Further, a clamping groove is formed in the rotating shaft.

Further, the inside of cavity is provided with the flabellum, the center pin department of flabellum is provided with the fixture block.

Further, the clamping block is in clamping connection with a clamping groove on the rotating shaft.

Further, the connection part of the side pipe and the rotating shaft is provided with a ball.

Further, a third bracket is arranged at the top end of the second sleeve.

Further, a plurality of springs are arranged on the third sleeve.

Further, one end of the spring is connected with the top end of the third sleeve, and the other end of the spring is connected with a positioning block on the third bracket through a bolt.

Further, a control module is arranged on the motor and is electrically connected with the motor.

Compared with the prior art, the utility model has the beneficial effects that:

the sealing ring is arranged on one side of the cavity and used for sealing the cavity, and the side pipe is arranged at the joint of the rotating shaft and the sealing ring and used for radiating friction generated by the rotating shaft; through setting up anti-return device in water inlet department, make the centrifugal pump lose behind motor spindle power, make the sleeve whereabouts through the pressure of spring and liquid and carry out the back stifled, make the cavity in full water, need not to add repeatedly.

Drawings

FIG. 1 is a perspective view of a centrifugal pump;

FIG. 2 is a top view of a centrifugal pump;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a perspective view of a seal ring;

FIG. 5 is an exploded view of the backflow preventer;

fig. 6 is another view of fig. 5.

In the figure: 10. a base; 101. a first bracket; 102. a second bracket; 103. a first bolt; 104. a second bolt; 11. a motor; 111. a control module; 112. a rotating shaft; 113. a clamping groove; 12. a first sleeve; 20. a pump body; 201. a water inlet pipe; 202. a water outlet pipe; 203. a water inlet; 21. a housing; 211. a cavity; 212. a fan blade; 213. a clamping block; 22. a seal ring; 221. a side pipe; 222. a ball; 23. a connecting cylinder; 231. a seal ring; 232. a flow guiding pipe; 30. a backflow prevention device; 31. a second sleeve; 311. a third bracket; 312. a positioning block; 313. a first groove; 314. an inner cylinder; 315. a water suction hole; 32. a third sleeve; 321. a spring; 322. and a second groove.

Description of the embodiments

The utility model is further described below with reference to examples.

The following examples are illustrative of the present utility model but are not intended to limit the scope of the utility model. The conditions in the examples can be further adjusted according to specific conditions, and simple modifications of the method of the utility model under the premise of the conception of the utility model are all within the scope of the utility model as claimed.

Referring to fig. 1 to 3, the present utility model provides a sealed backflow preventing centrifugal pump, comprising a base 10, a pump body 20 and a backflow preventing device 30; the centrifugal pump is characterized in that a first bracket 101 and a second bracket 102 are respectively arranged on the left side and the right side of the base 10, a plurality of first bolts 103 and second bolts 104 are used for connecting and fixing the centrifugal pump, a motor 11 is arranged on the first bracket 101, the motor 11 is fixed with the first bracket 101 through the first bolts 103, a control module 111 is arranged on the motor 11 and is electrically connected with the motor 11 for controlling the starting of the motor 11, a rotating shaft 112 is arranged on the motor 11, the rotating shaft 112 extends to the other side of the base 10, a clamping groove 113 is arranged on the rotating shaft 112, and a first sleeve 12 is sleeved with the rotating shaft 112 and used for protecting the rotating shaft 112 in use.

Referring to fig. 1 to 3, the second bracket 102 is provided with a pump body 10, and the pump body 20 includes a housing 21, a sealing ring 22, and a connecting cylinder 23; the utility model discloses a pump body, including pump body 10, casing 21, sealing ring 22, cavity 211, clamping block 213 and rotary shaft 112, the both sides of pump body 10 are provided with inlet tube 201 and outlet pipe 202 respectively, water inlet 203 is seted up at the top of pump body 10 and is used for adding water to the inside of pump body 10, be provided with the valve on the water inlet 203, the inside of casing 21 is provided with cavity 211, the inside of cavity 211 is provided with flabellum 212, the center pin department of flabellum 212 is provided with fixture block 213, fixture block 213 is connected with the draw-in groove 113 buckle on the rotary shaft 112, is convenient for dismantle and maintain the flabellum, rotates through rotary shaft 112 and drives flabellum 212 and rotate and then absorbs water to the inside formation vacuum state of cavity 21, the right side of flabellum 212 is provided with sealing ring 22, sealing ring 22 and cavity 21 pass through bolt 103 bolted connection, install the sealing pad in the middle of sealing ring 22 and the cavity 211 and seal and prevent revealing.

Referring to fig. 1 to 3, a side pipe 221 is disposed at a connection portion between the seal ring 22 and the rotating shaft 112, the side pipe 221 is connected with the cavity 21, a ball 222 is disposed at a connection portion between the side pipe 221 and the rotating shaft 112 to reduce friction force generated when the rotating shaft 112 rotates, when water in the cavity 211 rotates centrifugally, part of liquid can enter the side pipe 221 to flow and flow back into the cavity 211 for dissipating heat generated when the rotating shaft 112 and the ball 222 rotate, a connecting cylinder 23 is disposed on the right side of the seal ring 22, the inside of the connecting cylinder 23 is sleeved with the rotating shaft 112, the outer side of the connecting cylinder 23 is connected with the seal ring 22, a seal ring 231 is disposed at a connection portion between the connecting cylinder 23 and the seal ring 22 to seal the connection portion, and a flow guiding pipe 232 is disposed on the right side of the connecting cylinder 23 to guide the leaked liquid to prevent the liquid from damaging the motor 11.

Referring to fig. 5 and 6, a backflow preventing device 30 is disposed at the water inlet of the water inlet pipe 201 for preventing backflow of the liquid, and the backflow preventing device 30 includes a second sleeve 31 and a third sleeve 32; the novel water plugging device is characterized in that the second sleeve 31 is slidably connected with the third sleeve 32, a third bracket 311 is arranged at the top end of the second sleeve 31, a circle of positioning block 312 is arranged around the third bracket 311, a plurality of first grooves 313 are formed in the periphery of the second sleeve 31, an inner cylinder 314 is further arranged in the second sleeve 31, a plurality of water absorbing holes 315 are formed in the inner cylinder 314 and used for absorbing water, the inner side of the second sleeve 31 is slidably connected with the third sleeve 32, a plurality of springs 321 are arranged on the third sleeve 32, one end of each spring 321 is connected with the top end of the third sleeve 32, the other end of each spring 321 is connected with a positioning block 312 on the third bracket 311, a plurality of second grooves 322 are formed in the lower side of the periphery of the third sleeve 311, suction generated by rotation of the fan blade 212 is used for sucking the third sleeve 311, the third sleeve 311 compresses the springs 321, the second grooves 322 are overlapped with the first grooves 313, water absorbing holes 315 in the inner cylinder 314 are used for absorbing water, when the fan blade 212 stops rotating, the third sleeve 32 is used as the second sleeve 31 in the inner part of the first sleeve 202, and the second sleeve 313 cannot leak water downwards.

The working principle and the using flow of the utility model are as follows: firstly, water is added into the cavity 211 through the water adding port 203, when the motor 11 rotates to drive the rotating shaft 112 to rotate, the rotating shaft 112 contacts with the balls and rotates, the rotating shaft 112 rotates to drive the fan blade 212 to rotate to form a vacuum state in the cavity 211 so as to absorb water, when the water in the cavity 211 centrifugally rotates, part of liquid can enter the side pipe 221 to flow and flow back into the cavity 211 for radiating heat when the rotating shaft 112 and the balls 222 rotationally generate heat, the suction force generated by the rotation of the fan blade 212 sucks the third sleeve 32, the third sleeve 32 compresses the spring 321, the second groove 322 is overlapped with the first groove 313, water is absorbed through the water absorbing holes 315 on the inner barrel 314, and when the rotation of the fan blade 212 stops, the water pressure of the third sleeve 32 in the spring 321 and the water inlet pipe 201 acts on the first groove 313 and moves downwards along the second sleeve 31, so that the water in the cavity 211 cannot leak back.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A sealed backflow-preventing centrifugal pump, comprising a pump body (20) and a backflow-preventing device (30); the method is characterized in that: the pump body (20) comprises a motor (11), a sealing ring (22) and a connecting cylinder (23); the inside of pump body (20) is provided with cavity (211), pivot (112) of motor (11) extend to cavity (211) inside, sealing ring (22) are connected with cavity (211) bolted connection, the junction of sealing ring (22) and pivot (112) is provided with side pipe (221), side pipe (221) and cavity (211) internal connection, the right side of sealing ring (22) is provided with connecting cylinder (23), the inside of connecting cylinder (23) cup joints with pivot (112), the outside of connecting cylinder (23) is connected with sealing ring (22), the junction of connecting cylinder (23) and sealing ring (22) is provided with sealing washer (231) and seals, the right side of connecting cylinder (23) is provided with honeycomb duct (232), backflow preventing device (30) are including No. two sleeve (31) and No. three sleeve (32), no. two sleeve (31) and No. three sleeve (32) sliding connection.

2. A sealed backflow prevention centrifugal pump according to claim 1, wherein: the rotating shaft (112) is provided with a clamping groove (113).

3. A sealed backflow prevention centrifugal pump according to claim 1, wherein: the fan blade (212) is arranged in the cavity (211), and a clamping block (213) is arranged at the central shaft of the fan blade (212).

4. A sealed, backflow-preventing centrifugal pump according to claim 3, wherein: the clamping block (213) is in clamping connection with a clamping groove (113) on the rotating shaft (112).

5. A sealed backflow prevention centrifugal pump according to claim 1, wherein: the connection part of the side pipe (221) and the rotating shaft (112) is provided with a ball (222).

6. A sealed backflow prevention centrifugal pump according to claim 1, wherein: and a third bracket (311) is arranged at the top end of the second sleeve (31).

7. A sealed backflow prevention centrifugal pump according to claim 1, wherein: and a plurality of springs (321) are arranged on the third sleeve (32).

8. A sealed backflow preventing centrifugal pump according to claim 7, wherein: one end of the spring (321) is connected with the top end of the third sleeve (32), and the other end of the spring is connected with the positioning block (312) on the third bracket (311) through bolts.

9. A sealed backflow prevention centrifugal pump according to claim 1, wherein: the motor (11) is provided with a control module (111) which is electrically connected with the motor (11).