CN215568229U

CN215568229U - Safety back pressure valve

Info

Publication number: CN215568229U
Application number: CN202121137976.5U
Authority: CN
Inventors: 徐有银
Original assignee: Hangzhou World Plastic Co ltd
Current assignee: Hangzhou World Plastic Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-01-18
Anticipated expiration: 2031-05-26

Abstract

The utility model discloses a safe back pressure valve which comprises a valve cover, a valve body, a fastening bolt and a composite diaphragm, wherein the valve body is connected below the valve cover, a water receiving pipe is arranged in the middle of the lower part of the valve body, the fastening bolt is arranged on the upper surface of the valve cover, the fastening nut is connected to the surface of the water receiving pipe, a pressure adjusting bolt is arranged above the valve cover, a water inlet is arranged on the left side of the water receiving pipe, a clamping groove is formed in the valve body, the composite diaphragm is arranged on the clamping groove, a mounting screw is arranged above the inner part of the valve body, mounting grooves are formed in the lower part of the valve cover and the upper part of the valve body, and sealing rings are arranged on the mounting grooves. This safe back pressure valve, the middle part of valve body has seted up the draw-in groove and has been provided with mounting screw, can make things convenient for the effectual card of compound diaphragm in the inside of valve body through the draw-in groove to the use of cooperation mounting screw has made things convenient for compound diaphragm's installation and dismantlement, improves the device's life.

Description

Safety back pressure valve

Technical Field

The utility model relates to the technical field of safety back pressure valves, in particular to a safety back pressure valve.

Background

The safety back pressure valve is widely applied, can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and still has partial defects for the existing safety back pressure valve, such as:

the inside sealed effect of current safe back pressure valve when using is not good, and the change of the inside compound diaphragm of inconvenient valve body, and long-term the use results in the result of use of compound diaphragm relatively poor, uses and has the limitation, for this reason we provide a safe back pressure valve to solve the problem that exists in the aforesaid.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a safety back pressure valve, and aims to solve the problems that the existing safety back pressure valve in the background art is poor in internal sealing effect when in use, inconvenient to replace a composite diaphragm in a valve body, poor in use effect of the composite diaphragm caused by long-term use and limited in use.

In order to achieve the purpose, the utility model provides the following technical scheme: a safe back pressure valve comprises a valve cover, a valve body, a fastening bolt and a composite diaphragm, wherein the valve body is connected below the valve cover, a water receiving pipe is arranged in the middle of the lower part of the valve body, and the upper surface of the valve cover is provided with a fastening bolt, the surface of the water receiving pipe is connected with a fastening nut, a pressure adjusting bolt is arranged above the valve cover, a connector is connected below the pressure adjusting bolt, a safety spring is fixed on the surface of the connector, a spring top is connected below the safety spring, a water inlet is arranged on the left side of the water receiving pipe, a water outlet is arranged on the right side of the water receiving pipe, a clamping groove is arranged inside the valve body, a composite diaphragm is arranged on the clamping groove, and the inside top of valve body is provided with the mounting screw, the mounting groove has all been seted up to the below of valve gap and the top of valve body, and installs the sealing washer on the mounting groove.

Preferably, the pressure adjusting bolt is connected with the upper part of the valve cover in a threaded connection mode, the lower part of the pressure adjusting bolt and the connector are of an integrated structure, and the connector is of a convex structure.

Preferably, the fastening screw cap is connected with the water receiving pipe in a threaded manner, and the two fastening screw caps are symmetrically arranged around the central axis of the valve body.

Preferably, the spring top is of a T-shaped structure, and the safety spring above the spring top is located on the inner side of a convex structure below the connector.

Preferably, the composite diaphragm penetrates through a clamping groove in the middle of the valve body to form a clamping structure with the left side and the right side inside the valve body, and the valve body and the composite diaphragm form a fixing structure through mounting screws.

Preferably, the sealing ring is of a circular ring-shaped structure, and the sealing ring and the mounting grooves below the valve cover and above the valve body are of dismounting and mounting structures which are connected in a sealing manner.

Compared with the prior art, the utility model has the beneficial effects that: the safety back pressure valve;

(1) be provided with pressure adjusting bolt, connector, safety spring and spring top, can adjust safety spring length through rotating pressure adjusting bolt, change the pressure that the spring top acted on compound diaphragm, reach the regulation of different service pressure.

(2) The middle part of the valve body is provided with the clamping groove and the mounting screw, so that the composite diaphragm can be conveniently and effectively clamped in the valve body through the clamping groove, and the mounting screw is matched for use, so that the composite diaphragm is convenient to mount and dismount, and the service life of the device is prolonged;

(3) be provided with annular sealing washer, the sealing washer can with the below of valve gap and the mutual block in top of valve body, cooperation fastening bolt's use, the convenient leakproofness that improves this back pressure valve.

Drawings

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

FIG. 2 is a schematic cross-sectional structural view of the present invention;

FIG. 3 is a schematic top sectional view of the valve body of the present invention;

FIG. 4 is a schematic side view of the connection between the valve body and the composite diaphragm according to the present invention.

In the figure: 1. a valve cover; 2. a valve body; 3. a water receiving pipe; 4. fastening a bolt; 5. a pressure adjusting bolt; 6. fastening a nut; 7. a water inlet; 8. a water outlet; 9. a connector; 10. a safety spring; 11. a spring top; 12. a composite membrane; 13. mounting screws; 14. a seal ring; 15. mounting grooves; 16. a clamping groove.

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. 1-4, the present invention provides a technical solution: a safe back pressure valve comprises a valve cover 1, a valve body 2, a water receiving pipe 3, a fastening bolt 4, a pressure adjusting bolt 5, a fastening nut 6, a water inlet 7, a water outlet 8, a connector 9, a safety spring 10, a spring top 11, a composite diaphragm 12, a mounting screw 13, a sealing ring 14, a mounting groove 15 and a clamping groove 16, wherein the valve body 2 is connected below the valve cover 1, the water receiving pipe 3 is arranged in the middle of the lower part of the valve body 2, the fastening bolt 4 is arranged on the upper surface of the valve cover 1, the fastening nut 6 is connected on the surface of the water receiving pipe 3, the pressure adjusting bolt 5 is arranged above the valve cover 1, the connector 9 is connected below the pressure adjusting bolt 5, the safety spring 10 is fixed on the surface of the connector 9, the spring top 11 is connected below the safety spring 10, the water receiving pipe 3 is provided with the water inlet 7 on the left side, the water receiving pipe 3 is provided with the water outlet 8 on the right side, a clamping groove 16 is formed in the valve body 2, a composite diaphragm 12 is arranged on the clamping groove 16, a mounting screw 13 is arranged above the inside of the valve body 2, a mounting groove 15 is formed in the lower portion of the valve cover 1 and the upper portion of the valve body 2, and a sealing ring 14 is mounted on the mounting groove 15.

As shown in fig. 1 and 2, the pressure adjusting bolt 5 is connected with the upper part of the valve cover 1 in a threaded connection manner, the lower part of the pressure adjusting bolt 5 and the connector 9 are of an integrated structure, and the connector 9 is of a 'convex' structure, so that the pressure of the safety backpressure valve is conveniently adjusted, the fastening nut 6 is connected with the water receiving pipe 3 in a threaded connection manner, and the two fastening nuts 6 are symmetrically arranged about the central axis of the valve body 2, so that the safety backpressure valve and a pipeline are conveniently installed.

As shown in figure 2, the spring top 11 is in a T-shaped structure, and the safety spring 10 above the spring top 11 is positioned on the inner side of a convex structure below the connector 9, so that the gap between the middle of the composite diaphragm 12 and the sealing surface of the valve body 2 can be conveniently changed.

As shown in fig. 3 and fig. 4, the composite diaphragm 12 passes through the clamping groove 16 in the middle of the valve body 2 to form a clamping structure with the left side and the right side inside the valve body 2, and the valve body 2 and the composite diaphragm 12 form a fixing structure through the mounting screws 13, so that the composite diaphragm 12 is convenient to replace.

As shown in fig. 2 and 3, the sealing ring 14 is in a ring-shaped structure, and the sealing ring 14 and the mounting grooves 15 below the bonnet 1 and above the valve body 2 are in sealing connection, so that the sealing performance of the safety back pressure valve is improved.

The working principle is as follows: firstly, when the device is used, the device is installed at a place needing to be used, when the device is used, water pressure acts on the composite diaphragm 12 and is conducted to the spring top 11, the deformation pressure of the spring top 11 is achieved, the safety spring 10 contracts and deforms, the composite diaphragm 12 further deforms, a gap is formed between the middle of the composite diaphragm 12 and a sealing surface of the valve body 2, water flows out through the gap, when the pressure needs to be adjusted, the length of the safety spring 10 can be changed by rotating the pressure adjusting bolt 5, the pressure of the spring top 11 acting on the composite diaphragm 12 is further changed, different use pressures are achieved, the use of the back pressure valve is facilitated, the sealing ring 14 in a circular ring structure is installed between the valve cover 1 and the valve body 2, the valve cover 1 and the valve body 2 can be effectively sealed through the sealing ring 14, and the use sealing performance of the back pressure valve is improved;

when the internal composite diaphragm 12 needs to be replaced, the valve cover 1 and the valve body 2 are opened, the mounting screw 13 is rotated, the mounting screw 13 is conveniently separated from the surface of the valve body 2, the composite diaphragm 12 is conveniently taken out from the inner side of the valve body 2, and the composite diaphragm 12 is convenient to disassemble, assemble and replace.

The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described, and the content not described in detail in the specification belongs to the prior art known by persons skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a safe back pressure valve, includes valve gap (1), valve body (2), fastening bolt (4) and compound diaphragm (12), its characterized in that: the water-saving valve is characterized in that a valve body (2) is connected below the valve cover (1), a water receiving pipe (3) is arranged in the middle of the lower portion of the valve body (2), a fastening bolt (4) is arranged on the upper surface of the valve cover (1), a fastening nut (6) is connected to the surface of the water receiving pipe (3), a pressure adjusting bolt (5) is arranged above the valve cover (1), a connector (9) is connected below the pressure adjusting bolt (5), a safety spring (10) is fixed to the surface of the connector (9), a spring top (11) is connected below the safety spring (10), a water inlet (7) is formed in the left side of the water receiving pipe (3), a water outlet (8) is formed in the right side of the water receiving pipe (3), a clamping groove (16) is formed in the valve body (2), a composite diaphragm (12) is arranged on the clamping groove (16), and a mounting screw (13) is arranged above the inner portion of the valve body (2), mounting groove (15) have all been seted up to the below of valve gap (1) and the top of valve body (2), and install sealing washer (14) on mounting groove (15).

2. A safety back pressure valve according to claim 1, characterized in that: the pressure adjusting bolt (5) is connected with the upper part of the valve cover (1) in a threaded connection mode, the lower part of the pressure adjusting bolt (5) and the connector (9) are of an integrated structure, and the connector (9) is of a 'convex' structure.

3. A safety back pressure valve according to claim 1, characterized in that: the fastening screw caps (6) are connected with the water receiving pipe (3) in a threaded manner, and the two fastening screw caps (6) are symmetrically arranged about the central axis of the valve body (2).

4. A safety back pressure valve according to claim 1, characterized in that: the spring top (11) is of a T-shaped structure, and the safety spring (10) above the spring top (11) is positioned on the inner side of a convex structure below the connector (9).

5. A safety back pressure valve according to claim 1, characterized in that: the composite diaphragm (12) penetrates through a clamping groove (16) in the middle of the valve body (2) to form a clamping structure with the left side and the right side inside the valve body (2), and the valve body (2) and the composite diaphragm (12) form a fixing structure through a mounting screw (13).

6. A safety back pressure valve according to claim 1, characterized in that: the sealing ring (14) is of a circular ring-shaped structure, and the sealing ring (14) and the mounting grooves (15) below the valve cover (1) and above the valve body (2) are of dismounting and mounting structures which are connected in a sealing mode.