CN216555521U - Rubber-lined check valve - Google Patents

Abstract

The utility model relates to the technical field of check valves, and discloses a rubber-lined check valve, which comprises a valve body with an open structure at the upper end, wherein a water inlet with a trapezoidal cross section is formed in the wall surface below the valve body, the water inlet is in a shape with a small upper part and a big lower part, two valve plates are hinged on the inner wall of the bottom of the valve body through hinges, a torsion spring is arranged between the two valve plates, a valve shaft is arranged in the valve body corresponding to the upper part of the torsion spring, three backflow prevention devices are arranged in the valve body, a protection device is arranged in the valve body corresponding to the lower parts of the three backflow prevention devices, a layer of rubber is arranged on the inner wall of the valve body, the valve plates are pushed to turn upwards in the process that liquid flows from bottom to top, the torsion spring deforms, then the water flows out from a gap between the valve plates and the inner wall of the valve body, and the torsion spring rebounds when the water flow stops, so that the two valve plates are reset and the two water inlets are plugged again.

Description

Rubber-lined check valve

Technical Field

The utility model relates to the technical field of check valves, in particular to a rubber-lined check valve.

Background

The check valve is a valve whose opening and closing piece is a circular valve clack and can be operated by its self-weight and medium pressure to block back flow of medium. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards. Swing check valves have a flap that is tilted and can pivot, and operate on a similar principle to lift check valves. The check valve is commonly used as a bottom valve of a water pumping device and can prevent the backflow of water. The check valve and the stop valve are combined for use, and the safety isolation effect can be achieved.

The existing partial check valve is exposed outside and directly contacted with water on the inner wall, so that the sealing performance of the check valve is poor when the check valve is closed, and the corrosion resistance is weak.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a rubber-lined check valve, which solves the problems.

(II) technical scheme

In order to achieve the above purpose, the utility model provides the following technical scheme: a rubber-lined check valve comprises a valve body with an open structure at the upper end, wherein a water inlet with a trapezoidal cross section is formed in the wall surface below the valve body, the water inlet is in a shape with a small top and a big bottom, two valve plates are hinged to the position, corresponding to the water inlet, of the inner wall at the bottom of the valve body through hinges, a torsion spring is arranged between the two valve plates, a valve shaft is arranged in the valve body and corresponds to the position above the torsion spring, one end of the torsion spring is hung on the valve shaft, three backflow prevention devices are arranged in the valve body, a protection device is arranged in the valve body and corresponds to the position below the three backflow prevention devices, a layer of rubber is arranged on the inner wall of the valve body, the valve plates are pushed to turn upwards in the process that liquid flows from bottom to top, the torsion spring deforms, then the water flows out from a gap between the valve plates and the inner wall of the valve body, and rebounds to reset the two valve plates when the water flow stops, the two water inlets are plugged again, the inside of the valve body is coated with rubber, and the valve body is suitable for various media according to different rubber materials, and has good sealing property and corrosion resistance.

Preferably, prevent reflux unit and include the dog, set up the through-hole of running through formula on the circular position of dog, when liquid has the backward flow from top to bottom, can strike every group dog, reduced the impact force of rivers backward flow, avoided the condition of backward flow to take place to a very big extent.

Preferably, the bottom inner wall of the valve body is provided with a semicircular clamping groove, the valve plate is fixedly provided with a clamping block at a position corresponding to the clamping groove, the clamping block is matched with the clamping groove, the clamping block is clamped with the clamping groove, and when the valve plate is attached to the bottom inner wall of the valve body, the clamping block and the clamping groove can be clamped, so that the sealing performance of the scheme is greatly enhanced.

Preferably, fixed mounting has the sealing washer on the bottom inner wall of draw-in groove, and the bottom of sealing washer is seted up the cross section and is triangle-shaped's breach, and when the fixture block joint to the draw-in groove inside, the lower extreme of draw-in groove can extrude the sealing washer for the draw-in groove deformation lets the draw-in groove fill the clearance, thereby has further increased the leakproofness of this scheme, has seted up the breach simultaneously, when the sealing washer deformation, can guarantee that the sealing washer is abundant take place to both sides and deform, has guaranteed to fill the clearance completely.

Preferably, the side wall surfaces of the two valve plates corresponding to the water inlet are provided with grooves.

(III) advantageous effects

Compared with the prior art, the utility model provides a rubber-lined check valve which has the following beneficial effects:

1. this lining rubber check valve, the in-process that liquid flowed from bottom to top can promote the valve plate and turn to the top, and the deformation takes place for the torsional spring, then rivers flow away from the clearance between valve plate and the valve body inner wall, and when rivers stopped, the torsional spring kick-backs for two valve plates reset, with two water inlets shutoff again, the inside cladding rubber of valve body, according to the difference of rubber material, applicable in multiple medium, leakproofness and corrosion protection nature are good simultaneously.

2. This lining check valve is glued, sets up the through-hole of through-type on the circular position of dog, when liquid has the backward flow of upper and lower, can strike every group dog, has reduced the impact force of rivers backward flow, has avoided the condition of backward flow to take place to a very big degree.

3. This lining check valve, the fixture block is in the same place with the draw-in groove joint, and when the laminating of the bottom inner wall of valve plate and valve body, the fixture block can keep the joint with the draw-in groove, very big reinforcing the leakproofness of this scheme.

4. This rubber lining check valve, when the fixture block joint to the draw-in groove inside, the sealing washer can be extruded to the lower extreme of draw-in groove for the draw-in groove deformation lets the draw-in groove fill the clearance, thereby has further increased the leakproofness of this scheme, has seted up the breach simultaneously, when the sealing washer deformation, can guarantee that the sealing washer is abundant take place to both sides and deform, has guaranteed to fill the clearance completely.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of the structural stop of the present invention.

In the figure: 1. a valve body; 2. a water inlet; 3. a valve plate; 4. a torsion spring; 5. a valve shaft; 6. a groove; 7. a stopper; 8. a through hole; 9. a notch; 10. rubber; 11. a clamping block; 12. a card slot; 13. and (5) sealing rings.

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.

Referring to fig. 1-3, a rubber-lined check valve comprises a valve body 1 with an open structure at the upper end, a water inlet 2 with a trapezoidal cross section is arranged on the lower wall surface of the valve body 1, the water inlet 2 is in a shape of a small top and a big bottom, two valve plates 3 are hinged on the inner wall of the bottom of the valve body 1 corresponding to the water inlet 2 through hinges, a torsion spring 4 is arranged between the two valve plates 3, a valve shaft 5 is arranged in the valve body 1 corresponding to the upper part of the torsion spring 4, one end of the torsion spring 4 is hung with the valve shaft 5, three sets of backflow prevention devices are arranged in the valve body 1, a layer of rubber 10 is arranged on the inner wall of the valve body 1, the valve plates 3 are pushed to turn upwards during the process that liquid flows from bottom to top, the torsion spring 4 deforms, then the water flows out from the gap between the valve plates 3 and the inner wall of the valve body 1, when the water flow stops, the torsion spring 4 rebounds to reset the two valve plates 3, with two water inlets 2 shutoff again, the inside cladding rubber 10 of valve body 1, according to the difference of the 10 materials of rubber, applicable in multiple medium, leakproofness and corrosion resistance are good simultaneously, and torsional spring 4 plays the opening angle effect of restriction spring and valve plate 3, prevents that valve plate 3 from excessively opening.

Further, prevent that reflux unit from including dog 7, offer the through-hole 8 of through-going formula on the circular position of dog 7, when liquid has the backward flow from top to bottom, can strike every dog 7 of group, reduced the impact force of rivers backward flow, avoided the condition of backward flow to take place to a very big extent.

Further, semicircular clamping groove 12 is formed in the inner wall of the bottom of the valve body 1, a clamping block 11 is fixedly mounted on the position, corresponding to the clamping groove 12, of the valve plate 3, the clamping block 11 is matched with the clamping groove 12, the clamping block 11 is connected with the clamping groove 12 in a clamped mode, when the valve plate 3 is attached to the inner wall of the bottom of the valve body 1, the clamping block 11 and the clamping groove 12 can be kept in clamped connection, and the sealing performance of the scheme is greatly enhanced.

Further, fixed mounting has sealing washer 13 on the bottom inner wall of draw-in groove 12, the cross section is triangle-shaped's breach 9 has been seted up to sealing washer 13's bottom, when draw-in groove 12 is inside to the joint of fixture block 11, the lower extreme of draw-in groove 12 can extrude sealing washer 13, make draw-in groove 12 deformation, let draw-in groove 12 fill the clearance, thereby further increased the leakproofness of this scheme, breach 9 has been seted up simultaneously, when sealing washer 13 deformation, can guarantee that sealing washer 13 is abundant takes place to both sides deformation, guaranteed to fill the clearance completely.

Further, two valve plates 3 correspond one side wall of water inlet 2 and all seted up recess 6.

When using, the in-process that liquid flowed from bottom to top, can promote valve plate 3 and turn to the top, deformation takes place for torsional spring 4, then rivers flow away from the clearance between valve plate 3 and the 1 inner wall of valve body, when rivers stopped, 4 kick-backs of torsional spring for two valve plates 3 reset, with two water inlets 2 shutoff again, 1 inside cladding rubber 10 of valve body, according to the difference of rubber 10 material, applicable in multiple medium, leakproofness and corrosion protection nature are good simultaneously.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a rubber-lined check valve, includes that the upper end is open structure's valve body (1), its characterized in that: the cross section has been seted up to valve body (1) below wall and has been trapezoidal water inlet (2), and water inlet (2) are big end up shape, it has two valve plates (3), two to articulate through the hinge on the corresponding water inlet (2) position of bottom inner wall of valve body (1) be provided with torsional spring (4) between valve plate (3), and valve shaft (5) are installed to valve body (1) inside corresponding torsional spring (4) top position, and the one end and the valve shaft (5) of torsional spring (4) are hung together, the inside of valve body (1) is provided with three prevent reflux unit of group, install one deck rubber (10) on the inner wall of valve body (1).

2. The rubber-lined check valve of claim 1, wherein: the backflow preventing device comprises a stop block (7), and a through hole (8) is formed in the circular position of the stop block (7).

3. The rubber-lined check valve of claim 1, wherein: the valve is characterized in that a semicircular clamping groove (12) is formed in the inner wall of the bottom of the valve body (1), a clamping block (11) is fixedly mounted on the position, corresponding to the clamping groove (12), of the valve plate (3), the clamping block (11) is matched with the clamping groove (12), and the clamping block (11) is connected with the clamping groove (12) in a clamping mode.

4. A rubber-lined check valve as defined in claim 3, wherein: a sealing ring (13) is fixedly mounted on the inner wall of the bottom of the clamping groove (12), and a notch (9) with a triangular cross section is formed in the bottom of the sealing ring (13).

5. The rubber-lined check valve of claim 1, wherein: two valve plate (3) correspond one side wall of water inlet (2) and all set up fluted (6).

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