CN2558819Y

CN2558819Y - Soft seal butterfly valve

Info

Publication number: CN2558819Y
Application number: CN 02230588
Authority: CN
Inventors: 张大利
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-03
Filing date: 2002-04-03
Publication date: 2003-07-02
Anticipated expiration: 2012-04-03

Abstract

The utility model relates to a soft sealing butterfly valve, which comprises a valve body, a valve rod, a butterfly board, a transmission device, a seal element and an arrangement element. C-shaped seal rings are respectively arranged at an upper connection and a lower connection of the valve rod and the butterfly board, cuts of the C-shaped seal rings face the direction of medium pressure; meanwhile, an O-shaped seal circle is arranged inside the C-shaped seal ring, the medium pressure increases the seal power between the C-shaped seal ring, the valve body and the butterfly board. The utility model has good seal property, and is especially applicable to the special medium working condition of acid and alkali, etc. with very high requirement of seal property.

Description

Soft sealing butterfly valve

Technical field

The utility model relates to a kind of valve, specifically about a kind of soft sealing butterfly valve.

Background technique

Butterfly valve has hard seal butterfly valve and soft sealing butterfly valve two big classes by its sealed nature branch.Being the structure that adopts rubber or plastic materials to seal mutually between the butterfly plate of soft sealing butterfly valve and the sealing surface of seat, generally is to form soft sealing structure at lining rubber on the metal butterfly plate and on the valve body or plastic or other material.This butterfly valve has advantages such as sealing surface wear is little, corrosion resistance is strong, can be applicable to the switch control on the strong corrosive media pipelines such as acid, alkali.But, the sealing problem of soft sealing butterfly valve between valve rod and valve body never has effective solution, existing product has following several sealing configuration: the one, the O RunddichtringO is installed on the butterfly plate of valve rod periphery, the 2nd, on the butterfly plate of valve rod periphery He on the valve body O RunddichtringO is being installed respectively, these two kinds of structures are when the butterfly plate pressurized, pressure medium can promote butterfly plate and valve rod is shifted to a side, drives O RunddichtringO displacement simultaneously and leaks.Also having a kind of is in the valve rod periphery seal ring that the cross section is an E shape to be installed, in upper and lower two mouths of E shape ring, the O RunddichtringO is installed respectively, seal ring in the upper shed is embedded in the valve body, and the seal ring in the under shed is embedded in the butterfly plate, and the opening side of E V-shaped ring is towards valve rod.This sealing configuration is when the butterfly plate pressurized, and butterfly plate and valve rod can drive the E V-shaped ring and be shifted to low voltage side, makes the seal ring high pressure side occur leaking.As seen, existing soft sealing butterfly valve all also can't thoroughly solve the leakage problem between valve rod and the valve body, and its sealability is relatively poor, can not be applicable to the special operation condition that seal request is very high.

The model utility content

The purpose of this utility model is the problem that exists at prior art, and a kind of soft sealing butterfly valve of good seal performance is provided.

The technological scheme that realizes the utility model purpose comprises valve body, valve rod, butterfly plate, transmission device, Sealing and assembling set, at valve rod and the upper and lower joint of butterfly plate the C V-shaped ring is set respectively, the opening of C V-shaped ring is towards the pressure medium direction, and the O RunddichtringO is installed in inside.

The utility model beneficial effect compared with prior art is because in the upper and lower side of valve rod periphery of valve rod and butterfly plate joint a C V-shaped ring is installed respectively, its opening is towards the pressure medium direction, the inner O RunddichtringO of installing, when the valve closing state, C V-shaped ring and inner O RunddichtringO thereof force the both sides direction expansion up and down of C V-shaped ring under the effect of pressure medium, strengthened the sealing force between C V-shaped ring and the valve body, good seal performance can be applicable to the operating mode that seal request is very high.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of C V-shaped ring and O RunddichtringO among the utility model Fig. 1.

Fig. 3 is C V-shaped ring and the schematic representation of O RunddichtringO under the state of being stressed among the utility model Fig. 2.

Embodiment

Soft sealing butterfly valve as shown in Figure 1 comprises valve body 1, valve rod 3, butterfly plate 2, transmission device, Sealing and assembling set, and the internal surface of valve body 1 has plastic lining, and the surface of butterfly plate 2 is by plastic lining.At the butterfly plate 2 upper and lower sides difference setting-in C of valve rod 3 peripheries V-shaped ring 4,5, in the C V-shaped ring 4,5 the O RunddichtringO is housed respectively, the opening direction of C V-shaped ring is towards the pressure medium direction, as shown in Figure 2.Under the situation of being stressed, the upper and lower sides of C V-shaped ring can be expanded to both sides, strengthens the sealing force between itself and the valve body 1, as shown in Figure 3.

In Fig. 1, transmission device is made up of handle 7 and angle locking device, and its angle locking device is made up of the positioning hole on positioning bolt 8 and the dial 6, and positioning hole is provided with according to the corresponding valve opening angle.Positioning bolt 8 is limited on the handle 7 by screw 9 activities, on positioning bolt 8 and handle 7, be shaped on stationary positioned bolt 8 and open and lock the state locking device of two states, this state locking device is made up of twice groove made on the positioning bolt 8 and the steel ball 10, spring 11 and screws cover 12 that are in this twice groove side handle 7, spring 11 is placed in the screw cover 12, and screw overlaps 12 outside threads fixedlys connected with the screw-thread fit on the handle 7.Handle 7 is fixedlyed connected by screw 13 with valve rod 3, is provided with pointer on the handle 7 at dial 6 corresponding scale places.Transmission device also is provided with the rotation angle suggestion device, and the rotation angle suggestion device is made up of the prompting hole on the screw 14, spring 15, steel ball 16 and the dial 6 that are installed on the handle 7, and the position in the prompting hole on the dial 6 is provided with by the corresponding valve opening angle.

Claims

1, a kind of soft sealing butterfly valve, comprise valve body (1), valve rod (3), butterfly plate (2), transmission device, Sealing and assembling set, it is characterized in that the valve rod (3) and the upper and lower joint of butterfly plate (2) are provided with C V-shaped ring (4,5) respectively, the opening of C V-shaped ring (4,5) is towards the pressure medium direction, and O-ring seals is equipped with in inside.

2, soft sealing butterfly valve according to claim 1 is characterized in that C V-shaped ring (4,5) is inlaid in the butterfly plate (2).

3, soft sealing butterfly valve according to claim 1 and 2 is characterized in that the angle locking device in the transmission device is made up of positioning bolt on the handle (7) 8 and the positioning hole on the dial (6).