CN212251322U

CN212251322U - Fluorine-lined slow-closing check valve

Info

Publication number: CN212251322U
Application number: CN202020466865.8U
Authority: CN
Inventors: 朱孝有
Original assignee: Zhejiang Yfm Valve Co ltd
Current assignee: Zhejiang Yfm Valve Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-12-29
Anticipated expiration: 2030-04-02

Abstract

The utility model provides a fluorine lining slow-closure check valve, including valve body, valve gap, valve clack, slow-closure piston assembly and balance weight, wherein the balance weight passes through valve shaft and valve clack linkage, lies in the installation in the valve body and slowly closes the piston assembly position and be equipped with the storage and remain the storage space of medium to be equipped with closeable clearance mouth on the valve body near this storage space, through opening the remaining medium in the clearance mouth clearance storage space. The utility model has the advantages that: the valve can be cleaned regularly by arranging the cleaning port, so that the phenomenon of incomplete closing caused by residual media is prevented, wherein the valve body and the valve clack are made of steel parts and are all lined with PTFE materials, and the slowly-closed piston assembly is made of all PTFE materials, so that the valve can be applied to strong corrosion working conditions such as strong acid, strong alkali and the like.

Description

Fluorine-lined slow-closing check valve

Technical Field

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

Background

When the conventional check valve causes the medium to flow backwards, the valve is closed instantly, the medium stops instantly from the original fixed flow velocity, the kinetic energy of the flowing medium is converted into impact force on the pipeline and the valve, the water hammer phenomenon is caused, and the pipeline is easy to break, the valve is damaged and the like. On the basis of the check valve, a slowly-closing piston assembly and a balance weight assembly are added. Notice No. CN208431428U discloses a slowly-closed check valve, this check valve include disk seat, valve body, valve gap, valve plate counter weight and slow closing device, slowly close the device and include pneumatic cylinder, piston adjusting rod, advance oil pipe and go out oil pipe, piston adjusting rod sets up in one side that the valve plate was kept away from to the piston, piston adjusting rod passes pneumatic cylinder one end and links firmly with the piston, and the other end sets up outside the pneumatic cylinder, adjusts the distance size that the piston removed in the pneumatic cylinder through the adjusting nut who sets up on it, slowly-closed check valve still includes the governing valve, the governing valve is connected with an oil pipe to adjust the intraductal fluid flow rate of oil feed. When the medium refluxes, the valve clack of fluorine-lined slow-closure check valve closes rapidly, when being close when closing completely, the valve clack contacts with the piston assembly that slowly closes, the piston is compressed, the valve clack is closed and is obstructed, the medium can continue to flow through the clearance between valve clack and the disk seat, but flow greatly reduced, the impact force of medium refluxes simultaneously continues to promote the valve clack and tends to close, the piston is slowly compressed, the cooperation counter weight, until the valve clack is closed completely, the medium no longer flows, the valve is completely sealed, reach slowly closed, the effect of non return, thoroughly avoided the production of water hammer phenomenon. However, the medium is retained in the valve body at the position of the piston (A in figure 1) after long-term use of the valve, and the valve clack is pressed by the retained medium when being closed, so that the valve clack is not completely closed. And because the position relation of valve shaft and valve clack, also can have the medium to remain for a long time between valve shaft below and the valve body, lead to the valve clack to close incompletely.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a close thorough lining fluorine slow-closing check valve.

The utility model discloses a realize through following technical scheme:

lining fluorine slowly closes check valve, including valve body, valve gap, valve clack, slowly close piston assembly and counter weight, wherein the counter weight passes through valve shaft and valve clack linkage, lies in the installation in the valve body and slowly closes the piston assembly position and be equipped with the storage space of storage residual medium to be equipped with the clearance mouth that can close on the valve body that is close to this storage space, through opening the residual medium in the clearance mouth clearance storage space.

Preferably, the cleaning port is in threaded connection with a plug, and the plug is in sealing connection with the valve body.

Furthermore, in order to ensure that the plug can prevent corrosion, the plug comprises a connecting part and a sealing part, wherein the connecting part is in an external thread structure, the sealing part is a rubber block fixedly connected with the connecting part, and a fluorine lining layer is arranged on the end face of the sealing part. The fluorine lining layer can ensure that the blockage has an anti-corrosion effect, so that the valve can be used in strong corrosion working conditions such as strong acid, strong alkali and the like.

Furthermore, in order to ensure that the inner wall of the cleaning port cannot be corroded by the medium, the inner wall of the cleaning port is provided with a fluorine lining structure.

As a further improvement scheme, in order to prevent the valve clack from being influenced by medium deposition when the valve clack is closed between the lower part of the valve shaft and the valve body, the valve clack is connected to the top end or the right side end of the valve shaft, so that the medium deposition phenomenon cannot occur between the lower part of the valve shaft and the valve clack and the valve body in the closing and rotating process, and the condition that the valve shaft and the valve clack are not completely closed due to the medium deposition cannot occur.

Furthermore, the inner wall of the valve body, the outer part of the valve clack, the valve shaft arranged in the inner part of the valve body and the inner wall of the valve cover are all provided with fluorine lining structures. Therefore, the contact position of the whole valve with a medium is completely in a fluorine lining structure, so that the valve can adapt to strong corrosion working conditions such as strong acid, strong alkali and the like.

The utility model has the advantages that: the valve can be cleaned regularly by arranging the cleaning port, so that the phenomenon of incomplete closing caused by residual media is prevented, wherein the valve body and the valve clack are made of steel parts and are all lined with PTFE materials, and the slowly-closed piston assembly is made of all PTFE materials, so that the valve can be applied to strong corrosion working conditions such as strong acid, strong alkali and the like.

Drawings

FIG. 1 is a schematic structural diagram of the prior art;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a front view of the present invention;

fig. 4 is a schematic structural diagram of the plug of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples.

Examples

The fluorine-lined slow-closing check valve shown in figures 2-4 comprises a valve body 1, a valve cover 2, a valve clack 3, a slow-closing piston assembly 4 and a balance weight 5, wherein the balance weight 5 is linked with the valve clack 3 through the valve shaft 6, the valve shaft 6 is in sealing fit with the valve body 1 through a sealing structure, and the valve shaft 6 is ensured to rotate relative to the valve body 1, the piston component is the prior art, not described herein too much (see background art), a storage space 11 for storing residual media is provided in the valve body 1 at the location where the slow-closing piston assembly 4 is installed, and a closable cleaning opening 12 is provided in the valve body 1 near the storage space 11, the residual medium in the storage space 11 is cleaned by opening a cleaning port 12, wherein the cleaning port 12 is a round hole with a counter bore, the counter bore surface is a sealing surface, the cleaning port 12 is in threaded connection with a plug 7, and the plug 7 is in sealing connection with the valve body 1. The cleaning opening 12 can also be a groove provided with a cover plate, and the cover plate and the cleaning opening 12 are covered to ensure the sealing effect of the cover plate and the cleaning opening.

Further, in order to ensure that the plug 7 can prevent corrosion, the plug 7 comprises a connecting part 71 and a sealing part 72, wherein the connecting part 71 is in a male thread structure, the sealing part 72 is a rubber block fixedly connected with the connecting part 71, and a fluorine lining layer is arranged on the end surface of the sealing part 72. The fluorine lining layer can ensure that the plug 7 has an anti-corrosion effect, so that the valve can be used in strong corrosion working conditions such as strong acid, strong alkali and the like. One end of the rubber block is abutted against the sealing surface to form sealing fit.

Furthermore, in order to ensure that the inner wall of the cleaning port 12 is not corroded by the medium, the inner wall of the cleaning port 12 is provided with a fluorine lining structure. The inner wall fluorine lining structure of the cleaning port 12 and the inner wall fluorine lining structure of the valve body 1 are integrated.

As a further improvement scheme, in order to prevent the valve clack 3 from being influenced by medium deposition when the valve clack 3 is closed between the lower part of the valve shaft 6 and the valve body 1, the valve clack 3 is connected to the top end or the right side end of the valve shaft 6, so that the medium deposition phenomenon cannot occur between the lower part of the valve shaft 6 and the valve clack 3 and the valve body 1 in the closing and rotating process, and the situation that the valve shaft 6 and the valve clack 3 are not completely closed due to the medium deposition cannot occur.

Furthermore, the inner wall of the valve body 1, the outer part of the valve clack 3, the valve shaft 6 arranged in the valve body 1 and the inner wall of the valve cover 2 are all provided with fluorine lining structures. Therefore, the contact position of the whole valve with a medium is completely in a fluorine lining structure, so that the valve can adapt to strong corrosion working conditions such as strong acid, strong alkali and the like.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that simple modifications and substitutions by those skilled in the art are within the scope of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The fluorine-lined slow-closing check valve is characterized in that: including valve body, valve gap, valve clack, slowly close piston assembly and counter weight, wherein the counter weight passes through valve shaft and valve clack linkage, lies in the installation and slowly closes the storage space that the medium was remained in the piston assembly position in the valve body to be equipped with the clearance mouth that can close on the valve body that is close to this storage space, through opening the remaining medium in the clearance mouth clearance storage space.

2. The fluorine-lined slow-closing check valve as claimed in claim 1, wherein: the cleaning port is in threaded connection with a plug, and the plug is in sealing connection with the valve body.

3. The fluorine-lined slow-closing check valve as claimed in claim 2, wherein: the plug comprises a connecting part and a sealing part, wherein the connecting part is of an external thread structure, the sealing part is a rubber block fixedly connected with the connecting part, and a fluorine lining layer is arranged on the end face of the sealing part.

4. The fluorine-lined slow-closing check valve as claimed in claim 2, wherein: the inner wall of the cleaning opening is provided with a fluorine lining structure.

5. The fluorine-lined slow-closing check valve as claimed in any one of claims 1 to 4, wherein: the valve clack is connected to the top end or the right side end of the valve shaft.

6. The fluorine-lined slow-closing check valve as set forth in claim 5, wherein: the inner wall of the valve body, the outer part of the valve clack, the valve shaft are arranged in the valve body, and the inner wall of the valve cover is provided with a fluorine lining structure.