CN218894981U

CN218894981U - Polytetrafluoroethylene sealing butterfly valve

Info

Publication number: CN218894981U
Application number: CN202223198770.0U
Authority: CN
Inventors: 季能平; 季天娇; 宋云阳
Original assignee: Jiangsu Shanglong Water Supply Equipment Co ltd
Current assignee: Jiangsu Shanglong Water Supply Equipment Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-21
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a polytetrafluoroethylene sealing butterfly valve, which comprises a bottom cover, wherein a valve body is arranged on the bottom cover, a support is arranged at the top of the valve body, a lower bearing is embedded at the bottom of the valve body, an upper bearing is embedded at the top of the valve body, a short valve shaft is arranged in the lower bearing, a long valve shaft is arranged in the upper bearing, the short valve shaft and the long valve shaft are both fixed through a pin shaft, a valve clack is arranged between the short valve shaft and the long valve shaft, a polytetrafluoroethylene sealing ring is sleeved outside the valve clack, a gland is arranged outside the polytetrafluoroethylene sealing ring, a valve seat is arranged on the inner wall of the valve body, the valve seat limits the polytetrafluoroethylene sealing ring, a check ring is arranged outside the valve seat, the check ring is fixed through a limit step, and the valve seat is limited; compared with the traditional butterfly valve, the polytetrafluoroethylene sealing ring has long service life and good sealing performance, absolute insulation is free from electrochemical reaction defects, and meanwhile, adhesion of a valve body of the valve clack can be avoided, and the butterfly valve is prevented from being opened.

Description

Polytetrafluoroethylene sealing butterfly valve

Technical Field

The utility model relates to the technical field of butterfly valves, in particular to a polytetrafluoroethylene sealing butterfly valve and a working principle thereof.

Background

The sealing ring of the existing soft sealing butterfly valve is made of butadiene acrylonitrile rubber or ethylene propylene diene monomer rubber, and the following defects can occur during use:

(1) Durability is typically 2-3 years, and aging phenomena can occur, resulting in butterfly valve leakage.

(2) In water, the rubber can be contacted with metal for a long time, so that electrochemical reaction can occur, and the rubber aging can be accelerated.

(3) After rubber is deteriorated, when the butterfly valve is closed, the valve clack is adhered to the valve body by rubber, so that the butterfly valve cannot be opened.

Disclosure of Invention

The utility model aims to overcome the defects and shortcomings of the prior art and provides a polytetrafluoroethylene sealing butterfly valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a polytetrafluoroethylene seal butterfly valve, includes the bottom, set up the valve body on the bottom, the top of valve body sets up the support, the bottom of valve body is inlayed and is set up the lower bearing, and its top is inlayed and is set up the upper bearing, set up the spool in the lower bearing, set up the spool in the upper bearing, and spool are all fixed through the round pin axle, set up the valve clack between spool and the spool, its innovation point lies in: the valve is characterized in that a polytetrafluoroethylene sealing ring is sleeved outside the valve clack, a gland is arranged outside the polytetrafluoroethylene sealing ring, a valve seat is arranged on the inner wall of the valve body, the valve seat is used for limiting the polytetrafluoroethylene sealing ring, a check ring is arranged outside the valve seat, the check ring is fixed through a limiting step, and the valve seat is limited.

Further, a valve seat sealing ring is arranged between the valve seat and the valve body.

Furthermore, the short valve shaft and the long valve shaft are also sleeved with V-shaped sealing rings.

After the structure is adopted, the utility model has the beneficial effects that:

compared with the traditional butterfly valve, the polytetrafluoroethylene sealing ring has long service life, good sealing performance and no electrochemical reaction defect, and can avoid adhesion of the valve body of the valve clack and prevent the butterfly valve from being opened; for a user, the service life of the butterfly valve can be greatly prolonged, the maintenance period is prolonged, the maintenance convenience of the butterfly valve is improved, and the use cost of the butterfly valve is greatly reduced.

Drawings

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

fig. 2 is an enlarged schematic view at a in fig. 1.

Reference numerals illustrate:

1 a bottom cover, 2 a valve body, 3 a bracket, 4 a lower bearing, 5 an upper bearing, 6 a short valve shaft, 7 a long valve shaft, 8 a pin shaft, 9 a valve clack, 10 a polytetrafluoroethylene sealing ring, 11 a gland, 12 a valve seat, 13 a check ring, 14 a valve seat sealing ring, 15V-shaped sealing rings, 16 a valve seat adjusting bolt and 17 a valve seat supporting ring.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail below with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is presented by way of example only and is not intended to limit the utility model.

Referring to fig. 1-2, a polytetrafluoroethylene sealing butterfly valve comprises a bottom cover 1, a valve body 2 is arranged on the bottom cover 1, a support 3 is arranged at the top of the valve body 2, a lower bearing 4 is inlaid at the bottom of the valve body 1, an upper bearing 5 is inlaid at the top of the valve body, a short valve shaft 6 is arranged in the lower bearing 4, a long valve shaft 7 is arranged in the upper bearing 5, the short valve shaft 6 and the long valve shaft 7 are both fixed through a pin shaft 8, a valve clack 9 is arranged between the short valve shaft 6 and the long valve shaft 7, a polytetrafluoroethylene sealing ring 10 is sleeved outside the valve clack 9, a gland 11 is arranged outside the polytetrafluoroethylene sealing ring 10, a valve seat 12 is arranged on the inner wall of the valve body 2, the polytetrafluoroethylene sealing ring 10 is limited by the valve seat 12, a check ring 13 is arranged outside the valve seat 12, the check ring 13 is fixed through a limiting step, and the valve seat 12 is limited. In particular, because polytetrafluoroethylene is made of neutral materials, the polytetrafluoroethylene is insulated, and electrochemical reaction in water can not occur; the hardness of polytetrafluoroethylene is far higher than that of rubber materials, and the compressive strength is far higher than that of rubber; the service life of the polytetrafluoroethylene is far longer than that of a rubber material; therefore, the polytetrafluoroethylene seal 10 ring has long service life, good sealing performance and no electrochemical reaction defect in absolute insulation, and can avoid adhesion of a valve body of the valve clack and prevent the butterfly valve from being opened; for a user, the service life of the butterfly valve can be greatly prolonged, the maintenance period is prolonged, the maintenance convenience of the butterfly valve is improved, and the use cost of the butterfly valve is greatly reduced.

In this embodiment, a valve seat seal 14 is provided between the valve seat 12 and the valve body 2. The valve seat seal 14 serves to block leakage of pipe media from the bottom of the valve seat 12.

In this embodiment, the short valve shaft 6 and the long valve shaft 7 are also sleeved with V-shaped sealing rings 15. The V-shaped sealing ring 15 is used to improve the tightness between the short valve shaft 6 and the long valve shaft 7 and the valve body 2.

The foregoing is merely illustrative of the present utility model and not restrictive, and other modifications and equivalents thereof may occur to those skilled in the art without departing from the spirit and scope of the present utility model.

Claims

1. The utility model provides a polytetrafluoroethylene seal butterfly valve, includes the bottom, set up the valve body on the bottom, the top of valve body sets up the support, the bottom of valve body is inlayed and is set up the lower bearing, and its top is inlayed and is set up the upper bearing, set up the spool in the lower bearing, set up the spool in the upper bearing, and spool are all fixed through the round pin axle, set up the valve clack between spool and the spool, its characterized in that: the valve is characterized in that a polytetrafluoroethylene sealing ring is sleeved outside the valve clack, a gland is arranged outside the polytetrafluoroethylene sealing ring, a valve seat is arranged on the inner wall of the valve body, the valve seat is used for limiting the polytetrafluoroethylene sealing ring, a check ring is arranged outside the valve seat, the check ring is fixed through a limiting step, and the valve seat is limited.

2. The polytetrafluoroethylene seal butterfly valve of claim 1, wherein: and a valve seat sealing ring is arranged between the valve seat and the valve body.

3. The polytetrafluoroethylene seal butterfly valve of claim 1, wherein: and the short valve shaft and the long valve shaft are also sleeved with V-shaped sealing rings.