CN218152516U

CN218152516U - Backflow-preventing check valve

Info

Publication number: CN218152516U
Application number: CN202222219453.6U
Authority: CN
Inventors: 季滔; 何新华
Original assignee: NINGBO YONGXIANG COPPER PIPELINE CO Ltd
Current assignee: NINGBO YONGXIANG COPPER PIPELINE CO Ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2022-12-27
Anticipated expiration: 2032-08-23

Abstract

The utility model relates to a backflow-preventing check valve, which comprises a valve body, a connecting sleeve, a guide rod and a movable joint, wherein the outer wall of one end of the connecting sleeve is provided with a circle of limiting bulges; a baffle plate with a first through hole is arranged on the inner peripheral wall of the valve body at the end of the water inlet pipe, a second through hole is arranged on the bottom end wall of the connecting sleeve at the end of the valve body, one end of the guide rod is inserted in the first through hole, the other end of the guide rod is inserted in the second through hole, a spring is arranged between one end of the main body of the guide rod and the bottom end wall of the connecting sleeve and sleeved on the guide rod, a sealing gasket is arranged between the other end of the main body of the guide rod and the valve body and positioned on the side of the plate body, and the main body of the guide rod is positioned in a valve cavity arranged in the valve body; the utility model has the advantages of effectively prevent rivers refluence, sealing performance is reliable.

Description

Backflow-preventing check valve

Technical Field

The utility model belongs to the technical field of the check valve, especially, relate to a backflow prevention check valve.

Background

The water meter plays an important role in measuring the flow in the whole water network, and the accuracy of the value of the water meter influences the vital interests of a tap water company and a user. The consistency of the water flow direction in the pipe network plays an important role in the reading accuracy of the water meter, the water inlet end of a common water meter is connected with a check valve, but the phenomenon that the water flow flows backwards due to the fact that the pipe network stops water can exist in the actual use process, the existing check valve connected to the water meter has the defect that when the water flow flows backwards in the pipe network water-stopping process, the sealing effect is not good, the phenomenon that water flow seepage occurs sometimes can be caused, the accuracy of the reading of the water meter can be influenced, the water meter is damaged even, and the benefits of a supplier or a demander can be influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a check valve against backflow, can effectively cut off rivers when factors such as cutting off the water appear, effectively prevent the rivers refluence, sealing performance is reliable.

The utility model aims at solving the problems that the backflow prevention check valve comprises a valve body, a connecting sleeve, a guide rod and a movable joint connected with the water inlet end of a water meter, wherein the outer wall of one end of the connecting sleeve is provided with a circle of limiting bulges; be located into water pipe end the internal perisporium of valve body is equipped with a plate body that has first interlude hole, is located valve body end the bottom wall of adapter sleeve is equipped with the second interlude hole, the one end interlude of guide arm is in on the first interlude hole, the other end interlude of guide arm is in on the second interlude hole, the main part one end of guide arm with install the spring between the bottom wall of adapter sleeve, just the spring cup joints on the guide arm, the main part other end of guide arm with install sealed the pad between the valve body, just sealed pad is located the plate body side, the main part of guide arm is located the valve cavity that the valve body was equipped with.

The utility model has the advantages that: compared with the prior art, the backflow phenomenon of water flow can be effectively prevented by arranging the sealing gasket, the spring structure is added, the sealing performance between the sealing gasket and the valve body is ensured by the double pressure of the spring force and the pressure of the water flow, and zero leakage of the check valve can be realized; one end is provided with a movable joint, so that the water meter can be quickly connected, the heavier image of the traditional check valve is changed through design, and the effects of low cost and high quality are achieved.

Preferably, the cross section of the main body of the guide rod is of a stepped structure and is sequentially divided into a first stepped lug, a second stepped lug, a third stepped lug and a fourth stepped lug from top to bottom, the spring is sleeved on the first stepped lug, and one end of the spring is fixed on the second stepped lug; the sealing gasket is sleeved on the third stepped convex block and is limited and fixed through the second stepped convex block and the fourth stepped convex block; through the main part of the guide rod that this set up, not only can fixed spring and sealed the pad, but also can make the pressure energy of rivers fine act on in the main part of guide rod, the opening and closing of the guide rod of being more convenient for.

Preferably, the other end of the spring is limited in a first limiting groove formed in the bottom end wall of the connecting sleeve, so that the spring is stable and cannot deviate in the acting force process.

Preferably, the spring is a conical spring, the area of the bottom surface of the spring is larger than that of the top surface of the spring, the bottom surface of the spring is fixed on the second stepped bump, and the top surface of the spring is fixed in the first limiting groove; therefore, in the phenomenon of preventing water flow from flowing backwards, the spring force can act on the main body of the guide rod.

Preferably, a stepped hole is formed between the plate body and the valve body, the fourth stepped convex block is positioned in the stepped hole under the condition of water backflow, and the sealing gasket abuts against a stepped surface of the stepped hole; this makes the sealing effect of the gasket better.

Preferably, a gasket is arranged between the connecting sleeve and the movable joint, and the gasket is positioned in the movable joint and abuts against the upper end face of the connecting sleeve; therefore, after the movable joint is connected with the water inlet end of the water meter, the sealing performance among the connecting sleeve, the movable joint and the water inlet end of the water meter can be better through the gasket.

Preferably, the threaded connection part between the connecting sleeve and the valve body is coated with anaerobic adhesive; therefore, the sealing performance of the joint between the connecting sleeve and the valve body is better.

Drawings

Fig. 1 is a schematic view of the sectional structure of the check valve of the present invention.

The reference numbers in the drawings are respectively: 1. a valve body; 2. connecting a sleeve; 3. a guide bar; 4. a movable joint; 5. a plate body; 6. a spring; 7. a gasket; 8. a stepped hole; 9. a gasket; 11. a valve cavity; 21. a limiting bulge; 22. a second penetration hole; 23. a first limit groove; 31. a main body; 51. a first through hole; 31-1, first step bumps; 31-2, second step bumps; 31-3, third step bumps; 31-4, a fourth step bump;

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in the attached figure 1, the water meter comprises a valve body 1, a connecting sleeve 2, a guide rod 3 and a movable joint 4 connected with a water inlet end of the water meter, wherein a circle of limiting bulge 21 is arranged on the outer wall of one end of the connecting sleeve 2, the movable joint 4 is sleeved on the connecting sleeve 2 and abuts against the limiting bulge 21, the other end of the connecting sleeve 2 is connected with one end of the valve body 1 in a threaded connection mode, and the other end of the valve body 1 is connected with the water inlet pipe; a plate body 5 with a first through hole 51 is arranged on the inner peripheral wall of the valve body 1 at the end of the water inlet pipe, a second through hole 22 is arranged on the bottom end wall of the connecting sleeve 2 at the end of the valve body, one end of the guide rod 3 is inserted in the first through hole 51, the other end of the guide rod 3 is inserted in the second through hole 22, a spring 6 is arranged between one end of a main body 31 of the guide rod 3 and the bottom end wall of the connecting sleeve 2, the spring 6 is sleeved on the guide rod 3, a sealing gasket 7 is arranged between the other end of the main body 31 of the guide rod 3 and the valve body 1, the sealing gasket 7 is positioned on the side of the plate body 5, and the main body 31 of the guide rod 3 is positioned in a valve cavity 11 arranged in the valve body 1; the movable joint 4 is a movable joint nut.

The cross section of the main body 31 of the guide rod 3 is of a stepped structure and is sequentially divided into a first stepped bump 31-1, a second stepped bump 31-2, a third stepped bump 31-3 and a fourth stepped bump 31-4 from top to bottom, the spring 6 is sleeved on the first stepped bump 31-1, and one end of the spring 6 is fixed on the second stepped bump 31-2; the sealing gasket 7 is sleeved on the third stepped bump 31-3 and is limited and fixed through the second stepped bump 31-2 and the fourth stepped bump 31-4; the other end of the spring 6 is limited in a first limiting groove 23 arranged on the bottom end wall of the connecting sleeve 2; the spring 6 is a conical spring, the area of the bottom surface of the spring 6 is larger than that of the top surface of the spring 6, the bottom surface of the spring 6 is fixed on the second stepped projection 31-2, and the top surface of the spring 6 is fixed in the first limiting groove 23. Through the spring, both can guarantee that rivers self strength enough backs up and open, can supplementary sealed 7 realization zero leakage again.

A stepped hole 8 is arranged between the plate body 5 and the valve body 1, the fourth stepped convex block 31-4 is positioned in the stepped hole 8 under the condition of water backflow, and the sealing gasket 7 is abutted against the stepped surface of the stepped hole 8.

A gasket 9 is arranged between the connecting sleeve 2 and the movable joint 4, and the gasket 9 is positioned in the movable joint 4 and is propped against the upper end surface of the connecting sleeve 2.

Anaerobic adhesive is coated at the threaded connection part between the connecting sleeve 2 and the valve body 1.

The utility model discloses a theory of operation does: after the check valve is installed with the water meter, in a normal state, the water flow of the water inlet pipe jacks the main body 31 of the guide rod 3 through the water pressure of the water flow per se, the sealing gasket 7 is enabled not to be abutted against the step surface of the step hole 8, and the water flow enters the valve cavity 11 and flows into the water inlet end of the water meter through the connecting sleeve 2; when the water pipe network stops water supply, the main body 31 of the guide rod 3 is pressed against the stepped surface of the stepped hole 8 by the water pressure from the water inlet end of the water meter, and meanwhile, the sealing gasket is assisted by the reset force of the spring 6 to realize zero leakage.

The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.

Claims

1. The utility model provides a check valve of backflow prevention, includes valve body (1), nipple (2), guide arm (3) and is used for the loose joint (4) that are connected with the end of intaking of water gauge, its characterized in that: a circle of limiting bulges (21) are arranged on the outer wall of one end of the connecting sleeve (2), the movable joint (4) is sleeved on the connecting sleeve (2) and abuts against the limiting bulges (21), the other end of the connecting sleeve (2) is connected to one end of the valve body (1) in a threaded connection mode, and the other end of the valve body (1) is connected with a water inlet pipe; be located into water pipe end valve body (1) internal perisporium is equipped with plate body (5) that have first interlude hole (51), is located valve body end the bottom wall of adapter sleeve (2) is equipped with second interlude hole (22), the one end interlude of guide arm (3) is in on first interlude hole (51), the other end interlude of guide arm (3) is in on second interlude hole (22), main part (31) one end of guide arm (3) with install spring (6) between the bottom wall of adapter sleeve (2), just spring (6) cup joint on guide arm (3), the main part (31) the other end of guide arm (3) with install sealed pad (7) between valve body (1), just sealed pad (7) are located plate body (5) side, the main part (31) of guide arm (3) are located in valve chamber (11) that valve body (1) were equipped with.

2. The backflow prevention check valve as set forth in claim 1, wherein: the cross section of a main body (31) of the guide rod (3) is of a stepped structure and is sequentially divided into a first stepped bump (31-1), a second stepped bump (31-2), a third stepped bump (31-3) and a fourth stepped bump (31-4) from top to bottom, the spring (6) is sleeved on the first stepped bump (31-1), and one end of the spring (6) is fixed on the second stepped bump (31-2); the sealing gasket (7) is sleeved on the third step bump (31-3) and is limited and fixed through the second step bump (31-2) and the fourth step bump (31-4).

3. The backflow prevention check valve as set forth in claim 2, wherein: the other end of the spring (6) is limited in a first limiting groove (23) formed in the bottom end wall of the connecting sleeve (2).

4. The backflow prevention check valve as set forth in claim 3, wherein: the spring (6) is a conical spring, the area of the bottom surface of the spring (6) is larger than that of the top surface of the spring (6), the bottom surface of the spring (6) is fixed on the second stepped bump (31-2), and the top surface of the spring (6) is fixed in the first limiting groove (23).

5. The backflow prevention check valve of claim 2, wherein: plate body (5) with be equipped with shoulder hole (8) between valve body (1), fourth ladder lug (31-4) are located under the water refluence condition in shoulder hole (8), just sealed pad (7) with the ladder face of shoulder hole (8) offsets.

6. The backflow prevention check valve as set forth in claim 1, wherein: a gasket (9) is arranged between the connecting sleeve (2) and the movable joint (4), and the gasket (9) is positioned in the movable joint (4) and is propped against the upper end face of the connecting sleeve (2).

7. The backflow prevention check valve of claim 1, wherein: anaerobic adhesive is coated at the threaded connection part between the connecting sleeve (2) and the valve body (1).