CN202327253U

CN202327253U - Novel check valve

Info

Publication number: CN202327253U
Application number: CN2011204972023U
Authority: CN
Inventors: 吴治兵
Original assignee: TONGLING WANTONG VALVE CO Ltd
Current assignee: TONGLING WANTONG VALVE CO Ltd
Priority date: 2011-12-05
Filing date: 2011-12-05
Publication date: 2012-07-11
Anticipated expiration: 2021-12-05

Abstract

The utility model provides a novel check valve, which overcomes the defect of undesirable sealing effect between a valve plate and a valve body of the traditional check valve. The novel check valve is mainly characterized in that 1-3 sealed bosses are arranged at a contacting surface of an encapsulated valve plate, which is sealed with a valve body wall, cross sections of the bosses are of triangular shapes or semi-circle shapes, and thus unit pressure at the contacting position between the encapsulated valve plate and the valve body wall is enlarged, i.e. the sealing intensity between the encapsulated valve plate and the valve body wall is increased. The novel check valve provided by the utility model has a simple structure and a good backflow prevention effect.

Description

A kind of non-return valve

Technical field

The utility model relates to a kind of safety check, a kind of safety check of strengthening airtight function that has.

Background technique

At present; The pipeline that is used for industries such as oil, chemical industry, pharmacy, metallurgy, coal, electric power, urban water supply and sewerage; For flowing backwards, anti-fluid causes water pump and motor counter-rotating; The operation of guarantee network security, existing safety check is when the fluid forward flow, and the encapsulate valve plate is owing to be unlocked by the effect of the pressure of fluid own.When the fluid reverse flow, the encapsulate valve plate moves to closing direction, until airtight fully with sealing surface; The encapsulate valve plate is closed the back under the effect of pressure, on the valve plate valve body wall that is pressed in safety check tightly, because of the encapsulate valve plate under pressure the surface of contact of valve plate and valve body wall miniature deformation is arranged; Play airtight effect; Can play certain fluid countercurrent current that prevents, but because encapsulate valve plate and the airtight imprecision of valve body wall, anti-adverse current effect is undesirable.

Summary of the invention

The utility model provides a kind of anti-adverse current effective safety check.

In order to reach above purpose, the technological scheme of employing is: the encapsulate valve plate is fixed on the valve body wall through axle, and the encapsulate valve plate can sway, and on the encapsulate valve plate, and on the surface of contact of valve body wall sealing closed boss is arranged.

Further, the cross section of said boss is triangle or semicircle.

Further, said boss is 1-3.

Added boss on the surface of contact of encapsulate valve plate and valve body wall, under uniform pressure, because the encapsulate valve plate contacts with valve body wall through boss; Reduced area of contact, therefore, under the uniform pressure effect; The pressure that has the suffered unit area of the surface of contact of encapsulate valve plate and valve body wall of boss wants big; The contact surface deformable of encapsulate valve plate is also big, and therefore, obturation effect is just better.

Below in conjunction with this non-return valve of accompanying drawing further explain.

Description of drawings

Fig. 1 is the structural representation of the utility model safety check;

Fig. 2 is the structural representation of boss.

Specific embodiment

As depicted in figs. 1 and 2, the encapsulate valve plate 1 of a circle is arranged in valve body 3, encapsulate valve plate 1 is fixed on valve body 3 inwalls through axle 2; For improving the sealing effect of encapsulate valve plate 1 and valve body 3 walls; On encapsulate valve plate 1, there is boss 4 contacting point closed with valve body 3 walls, and boss 4 is closed; Be that boss 4 is closed on encapsulate valve plate 1, like ring.For strengthening the sealing intensity of encapsulate valve plate 1 and valve body 3 walls; The unit pressure that promptly adds the large contact surface place; The cross section of boss 4 is triangle or semicircle, and the mid point of a said leg-of-mutton angle or said semicircle circular arc contacts with valve body 3 walls, for increasing airtight effect; Can suitably increase the quantity of sealing boss 4, generally be advisable with 1-3.Certainly, the cross section of boss also is not limited to above-mentioned triangle or semicircle.

Claims

1. a non-return valve comprises valve body and encapsulate valve plate, and the encapsulate valve plate is fixed on the valve body wall through axle, it is characterized in that: on the encapsulate valve plate, with the valve body wall contacting point boss of sealing is arranged.

2. non-return valve according to claim 1 is characterized in that: described boss cross section is a triangle.

3. non-return valve according to claim 1 is characterized in that: described boss cross section is semicircle.

4. according to claim 1,2 or 3 described non-return valves, it is characterized in that: described boss has 1-3.