CN220770219U

CN220770219U - Check valve for preventing water backflow

Info

Publication number: CN220770219U
Application number: CN202321167191.1U
Authority: CN
Inventors: 杨小云
Original assignee: Zhejiang Donsen Environmental Technology Co ltd
Current assignee: Zhejiang Donsen Environmental Technology Co ltd
Priority date: 2023-05-12
Filing date: 2023-05-12
Publication date: 2024-04-12
Anticipated expiration: 2033-05-12

Abstract

The utility model provides a check valve for preventing water from flowing backwards, belongs to the technical field of fluid conveying, and particularly relates to a check valve for preventing water from flowing backwards. Including the valve body that is used for the non return, offer cavity in the valve body, set up in the valve body one side lean on top and the connecting block of bottom and set up the resistance board in one side in the valve body, valve body top bolted connection's top cap, one side is provided with the rocking arm near the upper end position in the valve body, one side of rocking arm is provided with the valve clack, the cavity has been seted up to the inside of connecting block. This prevent check valve of water refluence through setting up resistance plate, guide arm, connecting rod and supporting spring for this device when using, can utilize the dynamics of backward flow to exert pressure to the valve clack when appearing flowing back, thereby can strengthen the closing force of valve clack, avoid the valve clack to appear sealing up the condition of not tight because of wearing and tearing and ageing, carry the leakproofness of having strengthened this device, improved the practicality of this device, satisfied user's user demand.

Description

Check valve for preventing water backflow

Technical Field

The utility model relates to the technical field of fluid conveying, in particular to a check valve for preventing water from flowing backwards.

Background

The check valve is widely applied to a water supply system requiring check, can play a role in preventing a water outlet pipe from flowing backwards into a water inlet pipe, can isolate water inlet and outlet, plays a sanitary isolation effect, and simultaneously protects a pipeline in front of the check valve.

The check valve is used when fluid medium is conveyed, and the check valve is mostly sealed by rubber, however, the effect of the check valve is reduced along with the abrasion and aging of a rubber contact surface, so that the sealing is caused to not only permeate water, but also bring inconvenience to a user, and the use requirement of the user cannot be met.

Disclosure of Invention

The utility model aims to provide a check valve for preventing water from flowing backwards, so as to solve the problems that the effect of the check valve is reduced, sealing is caused, water seepage occurs, inconvenience is brought to a user, and the use requirement of the user cannot be met as the rubber contact surface is worn and aged in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the check valve for preventing water backflow comprises a valve body for checking, a cavity formed in the valve body, a connecting block arranged on one side in the valve body and close to the top and the bottom, and a resistance plate arranged on one side in the valve body, wherein the top cover is connected with the top of the valve body through bolts, a rocker arm is arranged on one side in the valve body and close to the upper end, a valve clack is arranged on one side of the rocker arm, and the cavity is formed in the connecting block.

Further, one side of the valve body is provided with a water inlet, and the other side of the valve body is provided with a water outlet.

Further, the upper part of the rocker arm is movably connected with the inner wall of the valve body through a rotating shaft, and the rotating shaft is fixedly connected with the inner wall of the valve body through a bolt.

Further, the valve clack is made of rubber and metal mixed materials, wherein the rubber surface of the valve clack is a contact surface, and the valve clack is in threaded connection with the rocker arm through a bolt.

Further, a guide rod is arranged on one side of the resistance plate, the guide rod is in threaded connection with the resistance plate through a bolt, and one end of the guide rod is in contact with the rocker arm.

Further, the top and the bottom of the guide rod are respectively provided with a connecting rod, one sides of the upper connecting rod and the lower connecting rod, which are opposite, respectively penetrate through the two connecting blocks and extend into the two connecting blocks, and the connecting rods are in sliding connection with the connecting blocks.

Further, a supporting spring is arranged on one side in the connecting block, and the connecting block is fixedly connected with the connecting rod through the supporting spring.

Further, the resistance plate adopts arc design, and adopts stainless steel material to make, and the top and the bottom of resistance plate all contact with the inner wall of valve body, and the both ends are not contacted with the valve body inner wall around the resistance plate.

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

this prevent check valve of water refluence through setting up resistance plate, guide arm, connecting rod and supporting spring for this device when using, can utilize the dynamics of backward flow to exert pressure to the valve clack when appearing flowing back, thereby can strengthen the closing force of valve clack, avoid the valve clack to appear sealing up the condition of not tight because of wearing and tearing and ageing, carry the leakproofness of having strengthened this device, improved the practicality of this device, satisfied user's user demand.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the structure of the present utility model;

FIG. 3 is an enlarged schematic view of a portion of FIG. 2A;

fig. 4 is an enlarged partial schematic view of B in fig. 2.

In the figure: 1. a valve body; 2. a rocker arm; 3. a valve flap; 4. a connecting block; 5. a resistance plate; 6. a feed port; 7. a guide rod; 8. a connecting rod; 9. a support spring; 10. and a flow outlet.

Detailed Description

The utility model will now be further described by way of specific examples with reference to the accompanying drawings, which are given by way of illustration only and not by way of limitation.

Referring to fig. 1-4, the present utility model provides a technical solution: the check valve for preventing water backflow comprises a valve body 1 for checking, a cavity formed in the valve body 1, a connecting block 4 arranged on one side of the valve body 1 and close to the top and the bottom, and a resistance plate 5 arranged on one side of the valve body 1, wherein a top cover is connected with the top of the valve body 1 through bolts, a rocker arm 2 is arranged on one side of the valve body 1 and close to the upper end, a valve clack 3 is arranged on one side of the rocker arm 2, and the cavity is formed in the connecting block 4.

The valve body 1 functions as a fluid delivery and cutoff function, and can function as a check.

Wherein the connecting block 4 can be used to set up the support spring 9 and limit the connecting rod 8 through the support spring 9, wherein the connecting rod 8 can limit the effect of the guide rod 7 for the guide rod 7 can not deviate when moving.

Further, one side of the valve body 1 is provided with a fluid inlet 6, and the other side of the valve body 1 is provided with a fluid outlet 10, wherein the fluid inlet 6 is a fluid inlet, and the fluid outlet 10 is a fluid outlet.

Further, the upper part of the rocker arm 2 is movably connected with the inner wall of the valve body 1 through a rotating shaft, and the rotating shaft is fixedly connected with the inner wall of the valve body 1 through a bolt, wherein the rocker arm 2 can drive the valve clack 3 to move, so that the valve clack 3 can be opened under the action of water flow, and the water flow circulates.

Furthermore, the valve clack 3 adopts rubber and metal mixing material to make, and wherein the rubber face of valve clack 3 is the contact surface, and valve clack 3 passes through bolt and rocking arm 2 threaded connection, and valve clack 3 can play the effect that stops the fluid circulation, and adopts rubber and metal mixing material to make, can increase the durability of this device, adopts bolted connection between valve clack 3 and the rocking arm 2, can conveniently assemble.

Further, one side of the resistance plate 5 is provided with a guide rod 7, the guide rod 7 is in threaded connection with the resistance plate 5 through a bolt, one end of the guide rod 7 is in contact with the rocker arm 2, wherein the contact area between the guide rod 7 and fluid can be increased by the resistance plate 5, the fluid is more stressed when pushed, the guide rod 7 can be used for abutting against the rocker arm 2, and accordingly pressure is applied to the valve clack 3, and the valve clack 3 is more compact.

Furthermore, the top and the bottom of the guide rod 7 are both provided with connecting rods 8, one sides of the upper connecting rod 8 and the lower connecting rod 8, which are opposite to each other, respectively penetrate through the two connecting blocks 4 and extend to the inside of the connecting rods, the connecting rods 8 are in sliding connection with the connecting blocks 4, wherein the connecting rods 8 are mutually matched with the connecting blocks 4, the limiting effect is achieved, and the condition that the guide rod 7 is deviated can be avoided.

Further, one side in the connecting block 4 is provided with a supporting spring 9, the connecting block 4 is fixedly connected with the connecting rod 8 through the supporting spring 9, wherein the supporting spring 9 is used for connecting the connecting rod 8, and the supporting spring 9 can increase pressure when resetting, so that the supporting spring 9 can drive the connecting rod 8 to prop against the rocker arm 2 when refluxing.

Further, the resistance plate 5 is of an arc design and is made of stainless steel, wherein the resistance plate 5 drives the guide rod 7 to move under the pushing of water flow, the top and the bottom of the resistance plate 5 are in contact with the inner wall of the valve body 1, the front end and the rear end of the resistance plate 5 are not in contact with the inner wall of the valve body 1, and the resistance plate 5 is of the design, so that even if the amount of reflux water is small, the resistance plate 5 can play a role, and the situation that the resistance plate 5 fails due to the small flow can be avoided.

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. Prevent check valve of water refluence, including valve body (1) that is used for the check, offer cavity in valve body (1), set up in valve body (1) one side lean on top and connecting block (4) of bottom and resistance board (5) of setting in valve body (1) one side, valve body (1) top bolted connection's top cap, its characterized in that: the valve is characterized in that a rocker arm (2) is arranged at the upper end position of one side in the valve body (1), a valve clack (3) is arranged on one side of the rocker arm (2), and a cavity is formed in the connecting block (4).

2. The check valve for preventing backflow of water according to claim 1, wherein: one side of the valve body (1) is provided with a water inlet (6), and the other side of the valve body (1) is provided with a water outlet (10).

3. The check valve for preventing backflow of water according to claim 1, wherein: the upper part of the rocker arm (2) is movably connected with the inner wall of the valve body (1) through a rotating shaft, and the rotating shaft is fixedly connected with the inner wall of the valve body (1) through a bolt.

4. The check valve for preventing backflow of water according to claim 1, wherein: the rubber surface of the valve clack (3) is a contact surface, and the valve clack (3) is in threaded connection with the rocker arm (2) through a bolt.

5. The check valve for preventing backflow of water according to claim 1, wherein: one side of the resistance plate (5) is provided with a guide rod (7), the guide rod (7) is in threaded connection with the resistance plate (5) through a bolt, and one end of the guide rod (7) is in contact with the rocker arm (2).

6. The check valve for preventing backflow of water of claim 5, wherein: the top and the bottom of guide arm (7) all are provided with connecting rod (8), and two connecting blocks (4) are run through respectively and extend to its inside to the one side that upper and lower two connecting rods (8) are opposite, sliding connection between connecting rod (8) and connecting block (4).

7. The check valve for preventing backflow of water according to claim 1, wherein: one side in connecting block (4) is equipped with supporting spring (9), connecting block (4) are through supporting spring (9) and connecting rod (8) fixed connection.

8. The check valve for preventing backflow of water according to claim 1, wherein: the resistance plate (5) is of an arc-shaped design and is made of stainless steel, the top and the bottom of the resistance plate (5) are in contact with the inner wall of the valve body (1), and the front end and the rear end of the resistance plate (5) are not in contact with the inner wall of the valve body (1).