CN110966256A

CN110966256A - Water pump and anti-return device thereof

Info

Publication number: CN110966256A
Application number: CN201911158450.2A
Authority: CN
Inventors: 吴前刃; 李向华
Original assignee: Zhejiang Jinmu Pump Co Ltd
Current assignee: Zhejiang Jinmu Pump Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-04-07
Anticipated expiration: 2039-11-22
Also published as: CN110966256B

Abstract

The invention discloses a backflow prevention device for a water pump, which relates to the field of water pumps and adopts the technical scheme that: the water inlet is used for being arranged at the bottom of the water pump and comprises an installation plate, and the installation plate is connected to the water pump and covers the water inlet; a plurality of water through holes are formed in the mounting plate, and the water through holes are used for allowing liquid to pass through and then enter a pump cavity of the water pump; the elastic sealing piece is fixedly connected to the upper end surface of the mounting plate, and covers each water through hole to enable the water inlet to be disconnected with the water through holes; when liquid enters from the limber hole, the liquid impacts the elastic sealing element to enable the elastic sealing element to deform, so that the limber hole is communicated with the water inlet. Through setting up elastic sealing element, reduce the liquid backward flow of pump intracavity for liquid is taken out futilely more thoroughly, thereby makes and takes out futilely the effect better.

Description

Water pump and anti-return device thereof

Technical Field

The invention relates to the field of water pumps, in particular to a water pump and a backflow prevention device thereof.

Background

Water pumps are machines that deliver or pressurize a liquid.

For example, chinese patent No. CN102777390A discloses a vertical large displacement water pump, which includes an impeller, an impeller shaft, a pump shaft, an inner tube bracket, a fixed cushion, a sealing device, a motor frame, a base, and a pump case, wherein the bottom of the base is provided with a pump body water inlet, the side wall of the base is provided with a pump body water outlet, and the top of the pump case is provided with a coupling. The upper end of the base is provided with a circular gland, and the gland is fixed on the base through bolts. The bolts are uniformly distributed on the outer side wall of the base.

When the water pump is used, the impeller rotates at a high speed, liquid in the impeller rotates along with the blades, the liquid flies away from the impeller and is ejected outwards under the action of centrifugal force, and then is discharged from the water outlet.

When adopting above-mentioned water pump to carry out the suction drainage to the liquid in a certain region, when the water pump suction to take away water completely the back, when the water pump was closed, remaining water can flow back in the pump chamber of base to lead to the pumping effect relatively poor, wait to improve.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a backflow prevention device for a water pump, which has the advantage of reducing liquid backflow in a pump cavity.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a water pump and anti-return device thereof for install the water inlet department in the water pump bottom, its characterized in that: the water pump comprises a mounting plate, wherein the mounting plate is connected to the water pump and covers the water inlet;

a plurality of water through holes are formed in the mounting plate, and liquid enters a pump cavity of the water pump after passing through the water through holes;

the elastic sealing piece is fixedly connected to the upper end face of the mounting plate and covers each water through hole, so that the water inlet is disconnected with the water through holes;

when liquid enters from the water through hole, the liquid impacts the elastic sealing piece to enable the elastic sealing piece to deform, so that the water through hole is communicated with the water inlet.

Through the technical scheme, after the anti-backflow device is installed at the water inlet of the water pump, when the water pump pumps liquid, the impeller rotates to enable low pressure to be formed in the pump cavity, at the moment, liquid enters the water inlet through the water through hole and pushes the elastic sealing element to deform towards the direction far away from the installation plate, and therefore the elastic sealing element cannot influence the liquid pumping operation of the water pump. When the water pump stop work, the impeller stop rotation of water pump this moment, elastic sealing element resets and covers the limbers under the elasticity effect to make the liquid of pump intracavity can not flow through the water inlet, thereby reduce the liquid backward flow of pump intracavity, make liquid pump dry effect better.

Furthermore, the elastic sealing element comprises a fixed part, an elastic part fixed on the outer ring of the fixed part and a contact part fixedly connected with the outer ring of the elastic part; the fixing part is in a circular ring shape, the fixing part is fixedly connected with the mounting plate through a coaxial penetrating fixing part, and the elastic part is in a circular ring plate shape and is coaxially arranged with the fixing part.

Through above-mentioned technical scheme, the fixed part is located the middle part of water inlet usually, and the coaxial setting of elastic component and fixed part for liquid passes through along the periphery of fixed part after the limbers gets into, has reduced the condition that elastic sealing element formed one-way water conservancy diversion to liquid, thereby makes liquid get into more evenly stably from the water inlet.

Further, the elastic part is gradually far away from the mounting plate towards the direction close to the axis of the elastic part.

Through above-mentioned technical scheme, when liquid got into and extrudees the elasticity portion towards keeping away from the mounting panel direction deformation from the limbers, the elasticity portion was close to the setting of keeping away from of fixed part department and mounting panel for when the elasticity portion warp and make conflict portion open, the passageway of intercommunication can be bigger between limbers and the water inlet, thereby makes the efficiency that the water pump intake higher.

Further, conflict portion is ring shape setting, the inside coaxial rigid ring board that is equipped with that inlays of conflict portion.

Through above-mentioned technical scheme, set up the rigidity ring board, the rigidity ring board is the steel sheet usually, can strengthen the structure of conflict portion through the rigidity ring board to when making the elastic component deformation, the deformation of conflict portion is little, thereby makes the sealed effect of conflict portion and mounting panel more stable. In addition, the density of the rigid circular ring plate is greater than that of the conflict part, so that the conflict part can be weighted, when the water pump stops working, the gravity of the conflict part can be increased by the rigid circular ring plate, the gravity of the conflict part is matched with the elastic force of the elastic part, the elastic part is reset more rapidly, and the backflow preventing effect of the elastic sealing element is better.

Further, the terminal surface that the mounting panel was kept away from to conflict portion is provided with a plurality of stoppers, and is a plurality of the stopper is circumference evenly distributed along conflict portion, leaves the space between the adjacent stopper.

Through above-mentioned technical scheme, set up the stopper, the impeller below that sets up anti-return means's water pump usually can set up the division board, sets up the through-hole that supplies liquid to pass through on the division board. When the water pump feed liquor makes elastic sealing element deformation, the stopper can conflict the division board and carry on spacingly to elastic sealing element's conflict portion to reduce the excessive displacement of conflict portion and make the condition that the elastic part became invalid that resets, the stopper also plays the effect of counter weight in addition, makes conflict portion and elastic part cooperation effect of resetting better.

Furthermore, the elastic sealing element is made of nitrile rubber.

Through the technical scheme, the nitrile rubber is a light brown elastomer, has good heat resistance and oil resistance, and has strong ageing resistance and wear resistance.

Further, the mounting is the bolt, screws up through the nut and is fixed in the mounting panel with the mounting on, a plurality of caulking grooves have been seted up along circumference to the up end of fixed part, the caulking groove runs through its inner ring wall setting towards one side of fixed part circumference, it is equipped with the rigidity abaculus to correspond to inlay in the caulking groove.

Through above-mentioned technical scheme, set up caulking groove and rigidity abaculus, the department structure of contradicting to fixed part and mounting is strengthened through the rigidity abaculus to reduce the transmission of elasticity portion deformation to the fixed part, make deformation break away from or the condition of wearing and tearing between fixed part up end and the mounting, thereby make elastic sealing's use more stable.

Further, the mounting panel includes annular plate body of circle, coaxial setting in the go-between of plate body inner circle, the lateral wall of plate body is fixed with the rubber ring pad, the lower terminal surface of rubber ring pad distributes along circumference has a plurality of guiding gutters, and is a plurality of the guiding gutter runs through the rubber ring pad setting along radially.

Through the technical scheme, the rubber backing ring and the water chute can form a water inlet space, the thickness of the rubber backing ring is usually 8-15mm, and liquid can flow into the water inlet through the water through hole by the aid of the rubber backing ring backing height.

Further, the plate body up end downward circular sunken form the mounting groove, and a plurality of limbers all correspond and set up in the mounting groove and correspond the department, the mounting panel still includes the sealing ring, the sealing ring is coaxial to be fixed in the mounting groove and around the limbers setting, the up end of sealing ring is used for supporting tightly the conflict and forms sealedly.

Through above-mentioned technical scheme, the one end that the mounting panel deviates from the mounting groove is a little higher than the lower terminal surface setting of rubber backing ring, sets up the sealing ring, and the sealing ring is the rubber material, and the sealing ring can be contradicted with conflict portion and strengthened sealedly to make the water pump during stop work, the sealed effect of elastic sealing spare and mounting panel is better, makes the anti-reflux better.

A water pump comprising a water pump backflow prevention device as claimed in any one of the preceding claims.

Through above-mentioned technical scheme, through increasing anti-return device in the water pump again to make more thoroughly when the water pump takes out dry liquid, make liquid take out dry the effect better.

Compared with the prior art, the invention has the beneficial effects that:

(1) by arranging the elastic sealing element, the liquid backflow in the pump cavity is reduced, so that the liquid is more thoroughly pumped, and the pumping effect is better;

(2) through setting up the rigidity ring board, can strengthen the structure of conflict portion for the sealed effect of conflict portion and mounting panel is more stable. In addition, the density of the rigid circular ring plate is greater than that of the abutting part, so that the abutting part can be weighted, the gravity of the abutting part is matched with the elasticity of the elastic part, the elastic part can reset more quickly, and the backflow prevention effect of the elastic sealing element is better;

(3) through setting up caulking groove and rigidity abaculus, the department structure is strengthened with the conflict of mounting to the fixed part through the rigidity abaculus to make elastic sealing element's use more stable.

Drawings

FIG. 1 is a general schematic view of a first embodiment;

FIG. 2 is a schematic structural diagram of a mounting plate according to the first embodiment;

fig. 3 is a schematic structural diagram of the elastic sealing member according to the first embodiment.

Reference numerals: 1. mounting a plate; 11. a plate body; 12. a connecting ring; 13. a seal ring; 2. an elastomeric seal; 21. a fixed part; 22. an elastic portion; 23. a contact part; 3. a rubber ring pad; 4. a water chute; 5. mounting grooves; 6. a water through hole; 7. a fixing member; 8. caulking grooves; 9. a rigid slug; 10. a rigid annular plate; 14. and a limiting block.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

The first embodiment is as follows:

a water pump backflow preventer, as shown in FIG. 1, includes a mounting plate 1 and an elastomeric seal 2. The mounting plate 1 is used for being mounted at the bottom of the water pump and covering the water inlet of the water pump. The mounting plate 1 includes a circular plate body 11 and a connecting ring 12 coaxially disposed at an inner ring of the plate body 11. The plate body 11 and the connecting ring 12 can be machined and formed through blanking, and the two parts are fixed through welding after being machined, so that the forming of the mounting plate 1 is more convenient compared with a pouring process.

As shown in fig. 1 and 2, a rubber ring pad 3 is fixed on the outer side wall of the plate body 11, the thickness of the rubber ring pad is 8-15mm, a plurality of water chutes 4 are circumferentially distributed on the lower end surface of the rubber ring pad 3, and the water chutes 4 radially penetrate through the rubber ring pad 3. The rubber backing ring 3 is lifted to enable liquid to flow through the water guide groove 4 and then flow through the water through holes 6 to enter the water inlet.

The upper end face of the plate body 11 is downwards circular and sunken to form a mounting groove 5, a plurality of water through holes 6 are distributed in the mounting groove 5, the mounting plate 1 further comprises a sealing ring 13, and the sealing ring 13 is coaxially fixed in the mounting groove 5 and is arranged around the water through holes 6. The section of the sealing ring 13 is arranged in a step shape, and the sealing ring is gradually decreased towards the direction far away from the axial lead of the sealing ring 13. The outer ring of the mounting groove 5 of the plate body 1 is usually provided with a mounting hole, and the mounting hole is penetrated through a bolt to be connected with a base of a water pump during actual use. When the backflow preventer is installed at the water inlet at the bottom of the water pump, the lower end face of the plate body 11 corresponding to the installation groove 5 is 1-2mm higher than the lower end face of the rubber backing ring, so that liquid can be pumped more thoroughly.

Go-between 12 upwards sunken setting, go-between 12's up end protrusion in the up end setting of plate body 11, the coaxial mounting 7 that is fixed with on the go-between 12, mounting 7 is the bolt, and mounting 7 mainly used wears to establish behind the elastic sealing element 2 fixed through the nut to make the elastic sealing element 2 be fixed in the go-between 12 upper end of mounting panel 1.

As shown in fig. 1 and 3, the elastic sealing member 2 is made of nitrile rubber, the elastic sealing member 2 is located on the upper end surface of the mounting plate 1, and the elastic sealing member 2 is provided to cover each water passage hole 6 so as to block the water inlet from the water passage hole 6. The elastic sealing member 2 includes a fixing portion 21, an elastic portion 22 fixed to an outer ring of the fixing portion 21, and an abutting portion 23 fixedly connected to an outer ring of the elastic portion 22.

Fixed part 21 is ring shape setting, and fixed part 21 supplies the coaxial back of wearing to establish of mounting 7 to pass through nut and mounting panel 1 fixed connection, and when actually fixed, the nut twists before can consolidate through the gasket, adopts a rubber packing piece and a metal gasket cooperation to compress tightly usually. A plurality of caulking grooves 8 are arranged on the upper end surface of the fixing part 21 along the circumferential direction, and one side of the caulking grooves 8 facing the circumferential direction of the fixing part 21 penetrates through the inner ring wall of the fixing part. When the fixing part 7 fixes the fixing part 21, the embedding groove 8 is also correspondingly embedded with a rigid embedding block 9. The rigid insert 9 is usually made of stainless steel, and the abutting part of the fixing part 21 and the fixing part 7 is structurally reinforced by the rigid insert 9, so that the deformation of the elastic part 22 is reduced and transmitted to the fixing part 21, and the deformation between the upper end surface of the fixing part 21 and the fixing part 7 is separated or abraded.

The elastic portion 22 has a circular plate shape and is disposed coaxially with the fixed portion 21, and the elastic portion 22 is disposed gradually away from the mounting plate 1 toward the axis thereof.

Conflict portion 23 is the ring shape and sets up, and conflict portion 23 and the coaxial setting of elastic component 22, the lower terminal surface of conflict portion 23 are used for conflicting mounting panel 1's sealing ring 13's up end face to form sealedly to make limbers 6 and water inlet carry out the break-make. The inside coaxial rigid circular plate 10 that is equipped with of conflict portion 23, rigid circular plate 10 is the steel sheet usually, can strengthen conflict portion 23's structure through rigid circular plate 10 to when making elastic component 22 deformation, conflict portion 23's deformation is little, thereby makes conflict portion 23 and mounting panel 1's the sealed effect of conflict more stable. In addition, the density of rigid circular plate 10 is greater than the density of conflict portion 23 to can aggravate conflict portion 23, when the water pump stop work, rigid circular plate 10 can increase the gravity of conflict portion 23, makes the gravity of conflict portion 23 and the elastic force cooperation of elastic component 22, makes the reseing of elastic component 22 more rapid.

The terminal surface that mounting panel 1 was kept away from to conflict portion 23 is provided with a plurality of stoppers 14, and a plurality of stoppers 14 are circumference evenly distributed along conflict portion 23, leave the space between the adjacent stopper 14. Usually, a partition plate is arranged below an impeller of a water pump provided with a backflow prevention device, and a through hole for liquid to pass through is formed in the partition plate. When water pump feed liquor made elastic sealing element 2 to deform, stopper 14 can contradict the division board and carry on spacingly to elastic sealing element 2's conflict portion 23 to reduce the condition that conflict portion 23 excessive displacement made elastic part 22 to reset and became invalid, stopper 14 also played the effect of counter weight in addition, made conflict portion 23 and elastic part 22 cooperation effect of resetting better. In addition, the gap between the adjacent limiting blocks 14 can be used for liquid to pass through, so that the water pump can pump water more stably.

The working principle of the embodiment is as follows:

when the anti-backflow device is used, the anti-backflow device of the water pump is arranged at the water inlet at the bottom of the water pump. When the water pump draws water, liquid enters from the limber hole 6, and the liquid impacts the elastic part 22 of the elastic sealing element 2, so that the elastic part 22 overcomes the elasticity of the elastic part and the gravity of the conflict part 23 to turn upwards, the conflict part 23 is separated from the sealing ring 13, the limber hole 6 is communicated with the water inlet, and the water pump finishes the water pumping operation at the moment.

When the water pump stop work, the impeller stop rotation of pump, elastic sealing element 2's conflict ring resets and contradicts under the effect of its gravity and the elasticity of elastic component 22 and seals in the up end of sealing ring 13, elastic sealing element 2 covers limbers 6 this moment, thereby make limbers 6 and water inlet break-make, thereby make the liquid of pump intracavity can not flow through the water inlet, thereby reduce the liquid backward flow of pump intracavity, make liquid take out futilely more thoroughly, thereby make liquid take out futilely the effect better.

Example two:

the utility model provides a water pump, includes the pump body, sets up in the base of pump body lower extreme, including driving motor in the pump body, is provided with the pump chamber in the base, and the water inlet with the pump chamber intercommunication is seted up to the bottom of base, sets up the delivery port with the pump chamber intercommunication on the lateral wall of base. The impeller is connected with the pump cavity in a rotating mode, the impeller is coaxially connected with the driving motor, the lower portion of the impeller is arranged on the partition plate, the partition plate is located in the pump cavity and fixed in the base, and a through hole for liquid to pass through is formed in the partition plate. The bottom of base still is provided with the water pump anti-return device in embodiment one, and the plate body 11 of water pump anti-return device passes through the bolt tightening with the bottom of base, and the inside wall of rubber ring pad 3 is contradicted in the lateral wall of base and is fixed a position.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a water pump anti-return device for install the water inlet department in water pump bottom, its characterized in that: the water pump comprises a mounting plate (1), wherein the mounting plate (1) is connected to the water pump and covers a water inlet;

a plurality of water through holes (6), wherein the water through holes (6) are arranged, and the water through holes (6) are formed in the mounting plate (1) for liquid to pass through and then enter a pump cavity of the water pump;

the elastic sealing piece (2) is fixedly connected to the upper end face of the mounting plate (1), and the elastic sealing piece (2) covers each water through hole (6) so that the water inlet is disconnected with the water through holes (6);

when liquid enters from the water through hole (6), the liquid impacts the elastic sealing piece (2) to enable the elastic sealing piece (2) to deform, and therefore the water through hole (6) is communicated with a water inlet.

2. A water pump backflow prevention device as claimed in claim 1, wherein: the elastic sealing element (2) comprises a fixing part (21), an elastic part (22) fixed on the outer ring of the fixing part (21) and an abutting part (23) fixedly connected with the outer ring of the elastic part (22); the fixing part (21) is arranged in a circular ring shape, the fixing part (21) is fixedly connected with the mounting plate (1) through a fixing part (7) which is coaxially arranged in a penetrating mode, and the elastic part (22) is in a circular ring plate shape and is coaxially arranged with the fixing part (21).

3. A water pump backflow prevention device as claimed in claim 2, wherein: the elastic part (22) is gradually far away from the mounting plate (1) towards the direction close to the axis of the elastic part.

4. A water pump backflow prevention device as claimed in claim 3, wherein: conflict portion (23) are ring shape setting, conflict portion (23) inside coaxial the inlaying rigid circular plate (10).

5. The water pump backflow prevention device as claimed in claim 4, wherein: conflict portion (23) keep away from the terminal surface of mounting panel (1) and be provided with a plurality of stopper (14), and is a plurality of stopper (14) are circumference evenly distributed along conflict portion (23), leave the space between adjacent stopper (14).

6. A water pump backflow prevention device as claimed in claim 2, wherein: the elastic sealing element (2) is made of nitrile rubber.

7. The water pump backflow prevention device of claim 6, wherein: mounting (7) are the bolt, screw up through the nut and are fixed in mounting panel (1) with mounting (7) on, a plurality of caulking grooves (8) have been seted up along circumference to the up end of fixed part (21), one side of caulking groove (8) towards fixed part (21) circumference runs through its inner ring wall setting, it is equipped with rigidity abaculus (9) to correspond to inlay in caulking groove (8).

8. A water pump backflow prevention device as claimed in claim 2, wherein: the mounting panel (1) sets up in go-between (12) of plate body (11) inner circle including annular plate body (11), coaxial, the lateral wall of plate body (11) is fixed with rubber ring pad (3), the lower terminal surface of rubber ring pad (3) distributes along circumference has a plurality of guiding gutters (4), and is a plurality of guiding gutter (4) set up along radially running through rubber ring pad (3).

9. A water pump backflow prevention device as claimed in claim 8, wherein: plate body (11) up end downward circular sunken forming mounting groove (5), a plurality of limbers (6) all correspond and offer in mounting groove (5) and correspond the department, mounting panel (1) still includes sealing ring (13), sealing ring (13) coaxial be fixed in mounting groove (5) and around limbers (6) setting, the up end of sealing ring (13) is used for supporting tight conflict portion (23) and forms sealedly.

10. A water pump, characterized by: a water pump backflow prevention device comprising any one of claims 1 to 9.