CN201858400U

CN201858400U - Check valve for preventing reverse flow

Info

Publication number: CN201858400U
Application number: CN201020537704XU
Authority: CN
Inventors: 张德山
Original assignee: XIAMEN AISILIN BATHROOM ACCESSORIES CO Ltd
Current assignee: Xiamen Aisilin Rubber and Plastic Technology Co., Ltd.
Priority date: 2010-09-20
Filing date: 2010-09-20
Publication date: 2011-06-08
Anticipated expiration: 2020-09-20

Abstract

The utility model relates to a valve body, in particular to a check valve for preventing fluid from flowing reversely in a pipeline, comprising an outer upper shell, an inner valve core and an outer lower circular shell, wherein the inner valve core is arranged in the outer upper shell; the outer lower circular shell is arranged in the outer upper shell; a spring is arranged between the inner valve core and the outer lower circular shell; a valve hole is arranged on the outer lower circular shell; the lower end of the inner valve core is sheathed in the lower circular shell; the upper end surface of the inner valve core abuts against the outer upper shell under the action of the spring; a ring-shaped groove of the outer upper shell is arranged on the outer surface of the outer upper shell; a sealing ring of the outer upper shell is arranged in the ring-shaped groove of the outer upper shell; a ring-shaped groove of the outer lower circular shell is arranged on the upper end surface of the inner valve core; and a sealing ring of the outer lower circular shell is arranged in the ring-shaped groove of the outer lower circular shell. The check valve is directly arranged in the pipeline, the fluid pressure controls the fluid to flow in a one-way manner under the action of the spring, the sealing stability is higher, the reverse flowing of the fluid is effectively prevented, the function of siphon prevention is achieved, the structure is simple, the installation is convenient, the cost is low and the popularization is easy.

Description

A kind of anti-reverse flow check valve

Technical field

The utility model relates to a kind of valve body, particularly a kind of safety check that prevents fluid countercurrent current in pipeline.

Background technique

In the middle of people's life, the phenomenon of cutting off the water supply suddenly under the fittings body opening state happens occasionally, and the moment of cutting off the water supply, inertial flow reason because of liquid, when fittings body leading portion fluid stopped suddenly, its back segment liquid can continue to flow, and its result will produce vacuum in the fittings body cavity, the stream of drawing back that causes sewage, the butt joint body pollute or the butt joint body in component produce corrosion, for avoiding the generation of this phenomenon, people tend to connect at the water outlet place check valve structure are set, and existing check valve structure adopts parts more, the cost height, the easy adverse current of fluid, assembling inconvenience, the rate of fault height, working life is short.

The model utility content

The purpose of this utility model provides a kind of simple and reliable for structure, and is easy for installation, and cost is low, and long service life effectively prevents the safety check of fluid countercurrent current.

The technological scheme that the utility model adopted is such: a kind of anti-reverse flow check valve, comprise outer upper casing, inner spool, outer circle shell down, described inner spool is loaded in the outer upper casing, and outer circle shell down is affixed with outer upper casing, be provided with a spring between described inner spool and the outer down round shell, described outer circle shell down is provided with a valve opening, and the inner spool lower end is placed in the valve opening of outer circle shell down, upper casing outside the upper-end surface of inner spool peaks under the effect of spring.

Described inner spool can move up and down the outer valve opening of circle shell down of turnover by spring under hydrodynamic pressure.

The outer surface of described outer upper casing is provided with outer upper casing annular groove, and outer upper casing seal ring is housed in the outer upper casing annular groove.

The upper-end surface of described inner spool is provided with the outer connected in star of circle girdle down, and the outer seal ring of circle shell down is housed in the outer connected in star of circle girdle down.

By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: this anti-reverse flow check valve is directly installed in the pipeline, hydrodynamic pressure is controlled one-directional fluid flow by the effect of spring, and sealing stability is higher, effectively prevent fluid countercurrent current, and it is have the function of anti-siphon, and simple in structure, easy for installation, cost is low, is easy to promote.

Description of drawings

Fig. 1 is the structural representation of a kind of anti-reverse flow check valve of the utility model;

Fig. 2 is the exploded view of a kind of anti-reverse flow check valve of the utility model.

Label among the figure is: 1, outer upper casing, 2, inner spool, 3, spring, 4, the outer shell of circle down, 11, outer upper casing annular groove, 12, outer upper casing seal ring, 21, the outer girdle of circle down connected in star, 22, the outer shell of circle down seal ring, 41, valve opening.

Embodiment

With reference to figure 1, the disclosed a kind of anti-reverse flow check valve of Fig. 2 embodiment, comprise outer upper casing 1, inner spool 2, outer circle shell 4 down, described inner spool 2 is loaded in the outer upper casing 1, outer shell 4 of circle down and outer upper casing 1 are affixed, be provided with a spring 3 between described inner spool 2 and the outer down round shell 4, described outer circle shell 4 down is provided with a valve opening 41, inner spool 2 lower ends are placed in the valve opening 41 of outer circle shell 4 down, and the outer surface of described outer upper casing 1 is provided with outer upper casing annular groove 11, and outer upper casing seal ring 12 is housed in the outer upper casing annular groove 11, the upper-end surface of described inner spool 2 is provided with the outer connected in star of circle girdle down 21, the outer seal ring of circle shell down 22 is housed in the outer connected in star of circle girdle down 21, under the static conditions, upper casing 1 outside the upper-end surface of inner spool 2 peaks under the effect of spring 3, the outer seal ring 22 of circle shell down closely cooperates with outer upper casing 1, keeps the safety check closure; Under dynamic condition during flow of fluid, fluid pressure overcomes spring 3 resistances, inner spool 2 shifts out outer circle shell 4 down, can realize conducting, liquid passes through the safety check one-way flow, during aqueous reflux backsiphonage under refluxad, and upper casing 1 outside the upper-end surface of inner spool 2 peaks under the effect of spring 3, the outer seal ring 22 of circle shell down closely cooperates with outer upper casing 1, has played the effect that prevents aqueous reflux.

Above-described, only be a preferred embodiment of the present utility model, can not limit the scope that this practicality is implemented, every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. anti-reverse flow check valve, comprise outer upper casing (1), inner spool (2), outer circle shell (4) down, it is characterized in that: described inner spool (2) is loaded in the outer upper casing (1), it is outer that circle shell (4) is affixed with outer upper casing (1) down, be provided with a spring (3) between described inner spool (2) and the outer down round shell (4), described outer circle shell (4) down is provided with a valve opening (41), inner spool (2) lower end is placed in the valve opening (41) of outer circle shell (4) down, upper casing (1) outside the upper-end surface of inner spool (2) peaks under the effect of spring (3).

2. a kind of anti-reverse flow check valve according to claim 1 is characterized in that: described inner spool (2) can move up and down the outer valve opening (41) of circle shell (4) down of turnover by spring (3) under hydrodynamic pressure.

3. a kind of anti-reverse flow check valve according to claim 1 is characterized in that: the outer surface of described outer upper casing (1) is provided with outer upper casing annular groove (11), and outer upper casing seal ring (12) is housed in the outer upper casing annular groove (11).

4. a kind of anti-reverse flow check valve according to claim 1 is characterized in that: the upper-end surface of described inner spool (2) is provided with outer circle girdle connected in star (21) down, in the outer circle girdle connected in star (21) down outer circle shell seal ring (22) down is housed.