CN203627939U

CN203627939U - High-sealing swing check valve

Info

Publication number: CN203627939U
Application number: CN201320586161.4U
Authority: CN
Inventors: 蔡敏
Original assignee: TIANJIN KINGFLYING TECHNOLOGY Co Ltd
Current assignee: TIANJIN KINGFLYING TECHNOLOGY Co Ltd
Priority date: 2013-09-22
Filing date: 2013-09-22
Publication date: 2014-06-04
Anticipated expiration: 2023-09-22

Abstract

The utility model belongs to the field of valves and particularly relates to a high-sealing swing check valve. The high-sealing swing check valve comprises a valve body, a valve bonnet, a 'V'-shaped rocker arm, a valve clack and a pin shaft. The tip of the 'V'-shaped rocker arm is rotationally connected with the pin shaft, one end of the rocker arm is detachably connected with the valve clack, and the other end of the rocker arm is provided with a pressure part which is detachably connected with the rocker arm. The valve bonnet is connected with the valve body through a bolt, a sealing washer is arranged between the valve body and the valve bonnet, the valve clack is provided with a sealing surface and a connecting column, and an elastic body is arranged on the sealing surface. One end of the 'V'-shaped rocker arm is connected with the valve clack, and the other end of the same is provided with the pressure part, so when pressure in a pipeline is reduced, the valve clack and the pressure part circumferentially move around the pin shaft, and when the valve clack contacts with the valve body, the pressure part still stays at the suspension state and tightly presses the valve clack under the action of the gravity, so that sealing of the valve is tighter to avoid leakage easily.

Description

A kind of high sealing Swing check valve

Technical field

The utility model belongs to valve field, relates in particular to a kind of high sealing Swing check valve.

Background technique

Safety check belongs to self-acting valve class, be mainly used on the pipeline of medium one-way flow, only allow medium to flow to a direction, to try to avert accidents, press flap motion mode difference, safety check is mainly divided into rise-fall type, rotary-open type and butterfly 3 classes, the structure that Swing check valve rocking arm adopts sphere to be connected with flap joint, make flap within the scope of 360 degree, have certain degrees of freedom, there is suitable micro-position compensation, open-shut device is opened voluntarily or closes by media flow and strength, fluid makes the flap of valve open under pressure, and flow to outlet side from suction side.When suction side pressure is during lower than outlet side, flap under the effect of hydrodynamic pressure and gravity own automatically by pathway closure, stop medium to flow backwards, the in-built rocking arm rotary-open type of the employing structure of Swing check valve, all open-shut device of valve are all loaded on valve inner, do not penetrate valve body, except middle flange position is with gasket seal and seal ring, entirety does not have outer leak source, stop the possibility that valve leaks, but because flap is closed under the effect of gravity, long-time practical, due to effects such as dielectric corrosions, often cause valve seal not tight, in addition in medium, there is impurity, make poorly sealed problem even more serious.

Summary of the invention

In order to solve the problems of the technologies described above, the utility model provides a kind of high sealing Swing check valve, comprise valve body, valve gap, rocking arm, flap, bearing pin, it is characterized in that described rocking arm is V-shaped, tip and the described bearing pin of described rocking arm " V " shape are rotationally connected; One end of described rocking arm is detachably connected with flap, and the other end is provided with compressing member; Described compressing member and rocking arm removably connect; Described valve gap and valve body are bolted, and between described valve body and valve gap, seal washer are set; Described flap is divided into sealing surface and attachment post, on described sealing surface, elastomer is set.

The angle on two limits of described rocking arm " V " shape is 45 °-70 °.

Described compressing member material is chromium NiTi cast steel-teflon.

On described valve interior surface, valve gap inner side, flap, rocking arm, scribble high elasticity water-proof paint.

The beneficial effects of the utility model are: the V-shaped design of rocking arm; one end of rocking arm is connected with flap; the other end is provided with compressing member; in the time of pressure decreased in pipeline, and flap and compressing member move in a circle around bearing pin simultaneously, when flap touches after valve body; because compressing member is still in vacant state; under the effect of gravity, flap is compressed, make the sealing of whole valve tighter, are difficult for revealing; By elastomer is set on sealing surface, make sealing tighter, on valve interior surface, valve gap inner side, flap, rocking arm, scribble high elasticity water-proof paint, can effectively prevent the corrosion of safety check, extend the working life of safety check.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further explained to explanation.

1, valve body, 2, valve gap, 3, rocking arm, 4, flap, 5, bearing pin, 6, compressing member, 7, seal washer, 8, sealing surface, 9, attachment post, 10, elastomer.

As shown in Figure 1, the utility model comprises valve body 1, valve gap 2, rocking arm 3, flap 4, bearing pin 5, rocking arm 3 is V-shaped, tip and the bearing pin 5 of rocking arm 3 " V " shape are rotationally connected, one end of rocking arm 3 is detachably connected with flap 4, the other end is provided with compressing member 6, compressing member 6 removably connects with rocking arm 3, valve gap 2 is bolted with valve body 1, between valve body 1 and valve gap 2, seal washer 7 is set, flap 4 is divided into sealing surface 8 and attachment post 9, elastomer 10 is set on sealing surface 8, the angle on two limits of rocking arm 3 " V " shape is 60 °, compressing member 6 materials are chromium NiTi cast steel-teflon, valve body 1 internal surface, valve gap 2 inner sides, rocking arm 3, on flap 4, scribble high elasticity water-proof paint.

Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variation and improvement etc. of doing according to the utility model application range, within all should belonging to patent covering scope of the present utility model.

Claims

1. a high sealing Swing check valve, comprise valve body (1), valve gap (2), rocking arm (3), flap (4), bearing pin (5), it is characterized in that described rocking arm (3) is V-shaped, tip and the described bearing pin (5) of described rocking arm (3) " V " shape are rotationally connected; One end of described rocking arm (3) is detachably connected with flap (4), and the other end is provided with compressing member (6); Described compressing member (6) removably connects with rocking arm (3); Described valve gap (2) is bolted with valve body (1), between described valve body (1) and valve gap (2), seal washer (7) is set; Described flap (4) is divided into sealing surface (8) and attachment post (9), and elastomer (10) is set on described sealing surface (8).

2. a kind of high sealing Swing check valve according to claim 1, the angle that it is characterized in that two limits of described rocking arm (3) " V " shape is 45 °-70 °.

3. a kind of high sealing Swing check valve according to claim 1, is characterized in that described valve body (1) internal surface, valve gap (2) inner side, rocking arm (3), flap scribble high elasticity water-proof paint on (4).