CN114718911A

CN114718911A - Sewage pump seal assembly and sewage pump

Info

Publication number: CN114718911A
Application number: CN202210373449.7A
Authority: CN
Inventors: 阮明伟; 严年喜; 阎红民
Original assignee: Jiangsu Taifeng Pump Co ltd
Current assignee: Jiangsu Taifeng Pump Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-07-08

Abstract

The invention provides a sewage pump sealing assembly and a sewage pump, and relates to the field of water pumps. This seal assembly, including the pump body, the middle part of the pump body alternates and is provided with the pivot, the inside of pivot is provided with a cavity to the inside slip of cavity is provided with the piston, the both ends of pivot all run through and are provided with the air flue, the upper end fixedly connected with apron of the pump body, the lower extreme edge of apron is provided with the bulge loop, the upper end of the pump body is provided with the recess, and has placed the second gasbag circle in the recess, the lower extreme middle part fixedly connected with central siphon of the pump body, the lower part lateral wall of pivot has cup jointed twice sealing washer, twice be provided with first gasbag circle between the sealing washer, the inner wall threaded connection of central siphon has the retaining ring, and this seal assembly is used for the sewage pump. The piston is arranged in the rotating shaft, the balance of internal and external pressure is realized along with the action of the piston, and the sealing performance of the sewage pump is improved by matching the arrangement of the first air bag ring and the second air bag ring.

Description

Sewage pump seal assembly and sewage pump

Technical Field

The invention relates to the technical field of water pumps, in particular to a sewage pump sealing assembly and a sewage pump.

Background

Water pumps are machines that deliver or pressurize a liquid. It transfers the mechanical energy of prime mover or other external energy to liquid to increase the energy of liquid, and is mainly used to transfer liquid including water, oil, acid-base liquid, emulsion, suspoemulsion and liquid metal.

A sewage pump is, as the name implies, a pump for pumping sewage. The water pump is divided into a submersible type pump and a non-submersible type pump, the working impeller structure of the submersible type pump and the motor structure are located in pumped liquid, and the motor driving structure of the non-submersible type pump is located on the bank side. Sewage pumps are usually of submersible design, where good sealing of the sewage pump is required.

The traditional water pump is sealed by adding sealing elements at the positions of a pump body and an end cover, the pump body and a rotating shaft, a wire inlet and the like. The seal is typically a flexible material of the type of a gasket, seal, gland, or the like. The accuracy of the seal affects the seal. Meanwhile, pressure difference exists between the inside and the outside of the water pump, and liquid flows into or is discharged out of the pump body. The pressure difference is caused by the depth of the sewage pump and the heat generated by the sewage pump during operation, so that the internal air is heated and expanded, and the pressure difference is uncertain in such a way. The creation of a pressure differential causes the sealing requirements of the water pump to increase substantially.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a sewage pump sealing assembly and a sewage pump, and solves the problems that the pressure difference is generated inside and outside the existing sewage pump, and the complexity of a sealing structure is increased.

(II) technical scheme

In order to realize the purpose, the invention is realized by the following technical scheme: a sewage pump sealing assembly comprises a pump body, wherein a rotating shaft is arranged in the middle of the pump body in an inserting mode, a cavity is arranged inside the rotating shaft, a piston is arranged inside the cavity in a sliding mode, and air passages are arranged at two ends of the rotating shaft in a penetrating mode;

the upper end of the pump body is fixedly connected with a cover plate, the edge of the lower end of the cover plate is provided with a convex ring, the upper end of the pump body is provided with a groove, a second air bag ring is arranged in the groove, the second air bag ring is an annular pipe which is connected end to end, gas is filled in the second air bag ring, and the convex ring is clamped in the groove and abuts against the second air bag ring;

the lower extreme middle part fixedly connected with central siphon of the pump body, the lower part lateral wall of pivot has cup jointed twice sealing washer, twice be provided with first gasbag circle between the sealing washer, the structure of first gasbag circle is unanimous with the structure of second gasbag circle, the inner wall threaded connection of central siphon has the retaining ring, the upper end of retaining ring is located the sealing washer of lower part, is located upper portion the upper end of sealing washer supports the pump body.

Preferably, two O-shaped rings are arranged on the side wall of the piston, and the side wall of each O-shaped ring is in contact with the inner wall of the rotating shaft.

Preferably, an oil chamber is arranged in the piston, an oil outlet is arranged on one side of the oil chamber, the oil outlet is located between the two O-shaped rings, and an oil inlet is arranged at the upper end of the piston.

A sewage pump comprises the sealing assembly, a sleeve, a base and an impeller, wherein the sleeve is fixed at the lower end of a pump body, the impeller is fixed at the lower part of a rotating shaft, the impeller is positioned in the sleeve, and the base is fixed at the lower end of the sleeve.

Preferably, the inner wall of the pump body is fixedly connected with a stator, the side wall of the rotating shaft is fixedly connected with a rotor, and the stator and the rotor are arranged in a nested manner.

Preferably, the side wall of the sleeve is fixedly connected with a water outlet pipe, and one end of the water outlet pipe is provided with a flange structure.

Preferably, the lower part of the base is in a horn shape, and through holes are distributed on the arc-shaped side face.

Preferably, the middle part of the upper end of the cover plate is fixedly connected with a handle, and a cable is arranged on one side of the handle.

Preferably, the upper part and the lower part of the rotating shaft are both provided with bearings, the bearings are positioned at the lower part and fixed on the pump body, and the bearings are positioned at the upper part and fixed on the cover plate.

(III) advantageous effects

The invention provides a sewage pump sealing assembly and a sewage pump. The method has the following beneficial effects:

1. according to the invention, the piston capable of sliding is arranged in the rotating shaft, and along with the sliding of the piston, the pressure in the pump body and the pressure outside the pump body can be balanced, so that the internal pressure and the external pressure are kept consistent, and the trend that liquid generated by pressure difference enters or is discharged from the pump body is eliminated, thereby reducing the complexity of a water pump sealing structure.

2. According to the invention, the first air bag ring and the second air bag ring are arranged and deform under pressure, so that the side walls of the air bag ring and the second air bag ring can be fully contacted with the sealing surface, and the sealing effect is improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 3;

fig. 6 is an enlarged view at C in fig. 3.

Wherein, 1, a base; 2. a water outlet pipe; 3. a sleeve; 4. a pump body; 5. a cover plate; 6. a handle; 7. a cable; 8. an impeller; 9. a bearing; 10. a rotating shaft; 11. a stator; 12. a rotor; 13. a retainer ring; 14. an axle tube; 15. a first balloon ring; 16. a seal ring; 17. an airway; 18. a piston; 19. an O-shaped ring; 20. an oil inlet; 21. an oil chamber; 22. an oil outlet; 23. a convex ring; 24. a second balloon ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1-6, an embodiment of the present invention provides a sewage pump sealing assembly, which includes a pump body 4, the pump body 4 is cylindrical, a rotating shaft 10 is inserted into the middle of the pump body 4, a chamber is disposed inside the rotating shaft 10, and a piston 18 is slidably disposed inside the chamber, that is, the position of the piston 18 can be changed, air passages 17 are disposed at both ends of the rotating shaft 10, the air passage 17 at the upper portion is communicated with the inside of the pump body 4, the air passage 17 at the lower portion is communicated with the outside of the pump body 4, that is, pumped liquid can enter the inside of the rotating shaft 10, the water pump of this type generally operates under water, and if there is a pressure difference between the inside and the outside of the pump body 4, that is, there is a tendency that fluid enters or exits the pump body 4, the pressure difference is larger, the sealing quality of the water pump is also tested, and the piston 18 is disposed at this position, when the pressure difference between the inside and the outside is not consistent, the piston 18 is pushed to balance the internal and external pressure difference, the trend that fluid enters or is discharged out of the pump body 4 is eliminated, and the sealing structure of the water pump is simplified on the premise that the sealing performance of the water pump is guaranteed.

The upper end fixedly connected with apron 5 of the pump body 4, be used for 4 upper ends of the pump body to seal, the lower extreme edge of apron 5 is provided with bulge loop 23, the upper end of the pump body 4 is provided with the recess, and second gasbag circle 24 has been placed in the recess, second gasbag circle 24 is an end to end's ring-shaped pipe, and the intussuseption is filled with gas, second gasbag circle 24 adopts flexible material, deformation can take place, bulge loop 23 card is gone into in the recess, and support second gasbag circle 24, close the back when apron 5 lid, bulge loop 23 supports extrusion second gasbag circle 24, the lateral wall and the recess inner wall of second gasbag circle 24 closely laminate, and under the deformation of second gasbag circle 24, the ascending sealing of all can be guaranteed.

Lower extreme middle part fixedly connected with central siphon 14 of the pump body 4, the lower part lateral wall of pivot 10 has cup jointed twice sealing washer 16, be provided with first gasbag circle 15 between twice sealing washer 16, the structure of first gasbag circle 15 is unanimous with the structure of second gasbag circle 24, and in effect, first gasbag circle 15 is unanimous with second gasbag circle 24, all after compression deformation, fully contact with sealing surface, improve the leakproofness, the inner wall threaded connection of central siphon 14 has retaining ring 13, the upper end of retaining ring 13 is located the sealing washer 16 of lower part, the upper end that is located upper portion sealing washer 16 supports the pump body 4, retaining ring 13 is used for restricting the position of sealing washer 16 and first gasbag circle 15.

The side wall of the piston 18 is provided with two O-rings 19, and the side wall of the O-ring 19 is contacted with the inner wall of the rotating shaft 10, so that the sealing performance of the piston 18 relative to the rotating shaft 10 is improved.

An oil chamber 21 is arranged in the piston 18, an oil outlet 22 is arranged on one side of the oil chamber 21, the oil outlet 22 is located between two O-shaped rings 19, grease in the oil chamber 21 can enter the space between the two O-shaped rings 19 from the oil outlet 22 in the rotating process of the rotating shaft 10, the sealing of the piston 18 is further improved, the sliding resistance of the piston 18 is reduced, an oil inlet 20 is formed in the upper end of the piston 18 and used for supplementing grease into the oil chamber 21, a one-way valve can be arranged at the oil inlet 20, and the grease is prevented from overflowing from the oil inlet 20 in the operating process of the sewage pump.

A sewage pump comprises the sealing assembly, a sleeve 3, a base 1 and an impeller 8, wherein the sleeve 3 is fixed at the lower end of a pump body 4, the impeller 8 is fixed at the lower part of a rotating shaft 10, the impeller 8 is positioned inside the sleeve 3, the sleeve 3 is used for protecting the impeller 8, a relatively sealed cavity is arranged at the impeller 8, fluid conveying is realized in the rotating process of the impeller 8, and the base 1 is fixed at the lower end of the sleeve 3 and used for supporting the upper structure.

The inner wall fixedly connected with stator 11 of the pump body 4, the lateral wall fixedly connected with rotor 12 of pivot 10, stator 11 and rotor 12 are nested and set up, and the sewage pump is for the circular telegram back, and stator 11 and rotor 12 take place relative rotation to drive pivot 10 and rotate, and drive impeller 8 and rotate, realize the pump water.

The lateral wall fixedly connected with outlet pipe 2 of sleeve pipe 3, the one end of outlet pipe 2 is provided with the flange structure for connect the raceway.

The lower part of base 1 is tubaeform, and distributes in the arc side and is provided with the through-hole, when there is the jam in the lower part of base 1, also can inhale sewage from the through-hole that base 1 lateral wall set up.

The middle part of the upper end of the cover plate 5 is fixedly connected with a handle 6 for transferring the sewage pump, and one side of the handle 6 is provided with a cable 7 for power supply treatment of the sewage pump.

The upper and lower side walls of the rotating shaft 10 are provided with bearings 9, the lower bearings 9 are fixed on the pump body 4, the upper bearings 9 are fixed on the cover plate 5, and the rotating friction force of the rotating shaft 10 is reduced.

The working principle is as follows: during the use, arrange the sewage pump in sewage and circular telegram, impeller 8 rotates to inhale sewage from the lower extreme of sleeve pipe 3, pump out sewage from outlet pipe 2, in-process, if the internal pressure of the pump body 4 and external pressure are unbalanced appear, the piston 18 that sets up in pivot 10 inside moves, and carry out the balance of interior and exterior pressure, offset the trend that the fluid that produces by the pressure differential got into or discharged pump body 4 promptly, under internal and external pressure is unanimous, can reduce the complexity of other seal structure of the pump body 4.

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

Claims

1. The sewage pump sealing assembly is characterized by comprising a pump body (4), wherein a rotating shaft (10) is inserted into the middle of the pump body (4), a cavity is arranged inside the rotating shaft (10), a piston (18) is slidably arranged inside the cavity, and air passages (17) penetrate through two ends of the rotating shaft (10);

the upper end of the pump body (4) is fixedly connected with a cover plate (5), the edge of the lower end of the cover plate (5) is provided with a convex ring (23), the upper end of the pump body (4) is provided with a groove, a second air bag ring (24) is arranged in the groove, the second air bag ring (24) is an annular pipe which is connected end to end, gas is filled in the annular pipe, and the convex ring (23) is clamped in the groove and abuts against the second air bag ring (24);

lower extreme middle part fixedly connected with central siphon (14) of the pump body (4), the lower part lateral wall of pivot (10) has cup jointed twice sealing washer (16), twice be provided with first gasbag circle (15) between sealing washer (16), the structure of first gasbag circle (15) is unanimous with the structure of second gasbag circle (24), the inner wall threaded connection of central siphon (14) has retaining ring (13), the upper end of retaining ring (13) is located sealing washer (16) of lower part, is located upper portion the upper end of sealing washer (16) supports the pump body (4).

2. The sewage pump seal assembly of claim 1, further comprising: two O-shaped rings (19) are arranged on the side wall of the piston (18), and the side wall of each O-shaped ring (19) is in contact with the inner wall of the rotating shaft (10).

3. The sewage pump seal assembly of claim 2, further comprising: an oil chamber (21) is arranged in the piston (18), an oil outlet (22) is arranged on one side of the oil chamber (21), the oil outlet (22) is located between two O-shaped rings (19), and an oil inlet (20) is formed in the upper end of the piston (18).

4. A sewage pump, characterized in that it comprises a sealing assembly according to any of claims 1-3, as well as a sleeve (3), a base (1) and an impeller (8), said sleeve (3) being fixed to the lower end of the pump body (4), said impeller (8) being fixed to the lower part of the rotating shaft (10), said impeller (8) being located inside the sleeve (3), said base (1) being fixed to the lower end of the sleeve (3).

5. The waste water pump of claim 4, further comprising: the pump comprises a pump body (4), and is characterized in that a stator (11) is fixedly connected to the inner wall of the pump body (4), a rotor (12) is fixedly connected to the side wall of the rotating shaft (10), and the stator (11) and the rotor (12) are arranged in a nested mode.

6. The sewage pump of claim 4, further comprising: the side wall of the sleeve (3) is fixedly connected with a water outlet pipe (2), and one end of the water outlet pipe (2) is provided with a flange structure.

7. The sewage pump of claim 4, further comprising: the lower part of the base (1) is horn-shaped, and through holes are distributed on the arc-shaped side face.

8. The sewage pump of claim 4, further comprising: the middle part of the upper end of the cover plate (5) is fixedly connected with a handle (6), and one side of the handle (6) is provided with a cable (7).

9. The waste water pump of claim 4, further comprising: and the upper side wall and the lower side wall of the rotating shaft (10) are respectively provided with a bearing (9), the bearing (9) is positioned at the lower part and fixed on the pump body (4), and the bearing (9) is positioned at the upper part and fixed on the cover plate (5).