CN210661403U

CN210661403U - Double-sealing corrosion-resistant butterfly valve

Info

Publication number: CN210661403U
Application number: CN201921739763.2U
Authority: CN
Inventors: 田江
Original assignee: Jiangsu Hida Marine Valve Co ltd
Current assignee: Jiangsu Hida Marine Valve Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-06-02
Anticipated expiration: 2029-10-17

Abstract

The utility model discloses a double-sealing corrosion-resistant butterfly valve, which relates to the technical field of valves. The utility model comprises two half-valve bodies with the same structure, the two half-valve bodies are detachably installed by bolts, a sealing ring is fitted between the two half-valve bodies, the inner ring surface of the sealing ring is a concave spherical surface, and A valve plate is installed in coordination, and a sealing ring is fixed between the two end faces of the sealing ring and the half valve body respectively. The sealing body of the butterfly valve of the utility model is composed of a detachable sealing ring and a valve plate, which form a spherical surface, and at the same time, a double sealing surface is formed by the sealing ring and the valve plate, and the sealing performance and corrosion resistance are stronger. There is no direct seal between the valve bodies, so that the corrosion of the valve body will not affect the sealing performance, and the valve body and internal components are easy to disassemble and maintain, and the corrosion of internal components can be replaced, thus greatly improving the service life of the butterfly valve.

Description

Double-sealing corrosion-resistant butterfly valve

Technical Field

The utility model belongs to the technical field of the valve, especially, relate to a corrosion-resistant butterfly valve of double seal.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve, the closing member of which is a disc and rotates around a valve shaft to achieve opening and closing. The valve 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. The pipe mainly plays a role in cutting off and throttling. The valve plate can be driven by the valve rod, and if the valve plate rotates ninety degrees, the valve plate can be opened and closed once. The deflection angle of the valve plate is changed, and the flow of the medium can be controlled.

The sealing is generally realized through the sealed face at valve plate installation sealing washer and valve body to present butterfly valve, and the sealed face of valve body and valve plate are easy wearing and tearing and corruption after using for a long time, cause the butterfly valve leakproofness to reduce to, this kind of damage can cause the valve body to scrap, consequently, has shortened the life of butterfly valve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a corrosion-resistant butterfly valve of double seal to solve the problem in the above-mentioned background art.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model discloses a double-seal corrosion-resistant butterfly valve, including two half valve bodies that the structure is the same, two through bolt demountable installation, two between the half valve body the sealing ring is installed in the cooperation between the half valve body, sealing ring inner circle surface is the indent sphere to the valve plate is installed in the cooperation, sealing ring both ends face respectively with be fixed with a sealing washer between the half valve body, the sealing washer forms sealed face with the all surface shapes of valve plate, the sealing ring runs through the valve rod that can be connected with the valve plate in one side, valve rod and two normal running fit between the half valve body.

Furthermore, the peripheral surface of the valve plate is provided with a positioning hole which is in plug-in fit with the valve rod.

Furthermore, the end face of the half valve body is provided with a circular groove matched with the sealing ring.

Furthermore, the sealing ring is made of hard alloy materials, so that the corrosion resistance and the wear resistance of the sealing ring can be improved.

Furthermore, the sealing ring is made of polytetrafluoroethylene materials, and the polytetrafluoroethylene materials are stable in chemical performance, strong in corrosion resistance, long in service life and good in sealing performance.

Furthermore, flange flanges are arranged on the connecting end surfaces of the two half valve bodies.

The utility model discloses following beneficial effect has:

the utility model discloses butterfly valve's sealed main part comprises detachable sealing ring and valve plate, forms the sphere cooperation, forms dual seal face by sealing washer and valve plate simultaneously, and leakproofness and corrosion resistance are stronger, because do not have direct seal between valve body and the valve plate, make the corruption of valve body can not influence the leakproofness to valve body and the equal dismouting maintenance of being convenient for of internals, internals corruption can be changed, has consequently improved butterfly valve's life greatly.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of the double-seal corrosion-resistant butterfly valve of the present invention;

FIG. 2 is a cross-sectional view of the novel butterfly valve, except for the valve plate;

fig. 3 is a schematic structural view of the half valve body.

In the drawings, the components represented by the respective reference numerals are listed below:

1-half valve body, 2-sealing ring, 3-valve plate, 4-sealing ring, 5-valve rod, 6-positioning hole and 7-circular groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1-3, the utility model discloses a double-sealing corrosion-resistant butterfly valve, including two half valve bodies 1 that the structure is the same, through bolt demountable installation between two half valve bodies 1, cooperation installation has sealing ring 2 between two half valve bodies 1, the inner circle surface of 2 sealing rings is the indent sphere, and the cooperation is installed

valve plate

3, 3 week surfaces of valve plate are evagination sphere, the anticorrosive leakproofness of valve plate 3 and sealing ring 2 has been improved, 2 both ends of sealing ring face respectively with half valve body 1 between be fixed with a sealing washer 4, sealing washer 4 forms sealed face with 3 week surfaces of valve plate, thereby form dual seal face, the leakproofness is better. One side of the sealing ring 2 is penetrated with a valve rod 5 which can be connected with the valve plate 3, and the valve rod 5 is in running fit with the two half valve bodies 1.

Wherein, the peripheral surface of the valve plate 3 is provided with a positioning hole 6 which is matched with the valve rod 5 in an inserting way.

Wherein, the end face of the half valve body 1 is provided with a circular groove 7 matched with the sealing ring 2.

Wherein, the sealing ring 2 is made of hard alloy materials, and can improve the corrosion resistance and the wear resistance of the sealing ring.

The sealing ring 4 is made of polytetrafluoroethylene materials, and the polytetrafluoroethylene materials are stable in chemical performance, strong in corrosion resistance, long in service life and capable of achieving good sealing performance.

Wherein, the connection end face of two half valve bodies 1 is equipped with the flange.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double-sealed corrosion-resistant butterfly valve, characterized in that it comprises two half-valve bodies (1) with the same structure, the two half-valve bodies (1) are detachably installed by bolts, and the two half-valve bodies (1) A sealing ring (2) is fitted between the valve bodies (1), the inner ring surface of the sealing ring (2) is a concave spherical surface, and a valve plate (3) is fitted and fitted, and both ends of the sealing ring (2) are A sealing ring (4) is fixed between the half valve body (1). The valve stem (5) connected with the valve plate (3), the valve stem (5) and the two half-valve bodies (1) are rotatably fitted.

2. The double-sealed corrosion-resistant butterfly valve according to claim 1, characterized in that, the peripheral surface of the valve plate (3) is provided with a positioning hole (6) which is inserted and matched with the valve stem (5).

3 . The double-sealed corrosion-resistant butterfly valve according to claim 1 , wherein the end surface of the half valve body ( 1 ) is provided with a circular groove ( 7 ) matched with the sealing ring ( 2 ). 4 .

4. The double-sealed corrosion-resistant butterfly valve according to claim 1, wherein the sealing ring (2) is made of cemented carbide.

5 . The double-sealed corrosion-resistant butterfly valve according to claim 1 , wherein the sealing ring ( 4 ) is made of polytetrafluoroethylene. 6 .

6 . The double-sealed corrosion-resistant butterfly valve according to claim 1 , wherein flange flanges are provided on the connecting end faces of the two half-valve bodies ( 1 ). 7 .