CN203442240U

CN203442240U - Muffle check valve

Info

Publication number: CN203442240U
Application number: CN201320513322.7U
Authority: CN
Inventors: 陈伟军
Original assignee: SHANGHAI YUCHENG FLUID CONTROL Co Ltd
Current assignee: SHANGHAI YUCHENG FLUID CONTROL Co Ltd
Priority date: 2013-08-22
Filing date: 2013-08-22
Publication date: 2014-02-19
Anticipated expiration: 2023-08-22

Abstract

The utility model discloses a muffle check valve which comprises a valve body (1), a valve seat (2), a valve clack (6) and a valve rod (7). The muffle check valve is characterized in that the valve body (1) is in an ellipsoid shape, the valve seat (2) is mounted at the bottom inside the valve body (1), the valve seat (2) is provided with the valve clack (2) and the valve rod (7) which are integrally connected, a sealing ring (3) is arranged on the portion where the valve seat (2) and the valve clack (6) are in contact, the valve clack (6) is provided with a spiral spring (8), and the valve clack (6) is attached to the sealing ring (3) through the thrust of the spiral spring (8). According to the muffle check valve, direction constrains are avoided in the mounting process, the harm of water hammers can be effectively eliminated, the resistance met by fluid is small, the noise is low, and the muffle check valve is also suitable for places where media flow back quickly.

Description

A kind of damping check valve

Technical field

The utility model relates to a kind of valve, relates in particular to a kind of damping check valve.

Background technique

At present both at home and abroad common safety check comprises two kinds of Swing check valve and Lift check valves.

Swing check valve has Jie's linkage, also has a flap as door freely to lean against on the valve base surface of inclination.In order to ensure flap, can arrive the correct position of valve seat surface, flap design, at linkage, opens space so that flap has enough to have to revolve at every turn, and make flap real, comprehensively contact with valve seat.Flap can all be made with metal, also can on metal, inlay leather, rubber or adopt synthetic coverage rate, and this depends on the requirement of usability.Swing check valve is under the situation of opening completely, and hydrodynamic pressure is interrupted hardly, therefore relatively little by the Pressure Drop of valve.

The flap of Lift check valve is located in and is positioned on valve body upper valve base sealing surface.This valve is except freely lifting of flap, and remaining part is as stop valve, and hydrodynamic pressure makes flap lift from sealing surface of seat, and medium back flow causes flap to fall back on valve seat, and cuts off mobile.According to service condition, flap can be all metal construction, can be also the form of inlaying rubber pad or rubber ring on valve petal shelf.As stop valve, fluid is also narrow by the passage of Lift check valve, therefore larger than Swing check valve by the Pressure Drop of Lift check valve, and the restriction that the flow of Swing check valve is subject to seldom.This class valve generally should level be installed in pipeline.

The effect of these two kinds of safety check is all to stop in the other direction to flow, and only allows medium to flow to a direction.Conventionally valve is automatic operation, and under the mobile fluid pressure action of direction, flap is opened; When fluid flows, by the flap of coincidence certainly of hydrodynamic pressure and flap, act on valve seat in the other direction, thereby cut off, flow.When these two kinds of safety check are installed, all have directivity, and noise is large, is not suitable for medium and flows backwards local very rapidly.

Summary of the invention

Technical problem to be solved in the utility model is: non-directional constraint when a kind of installation is provided, can effectively get rid of water hammer harm, and power that fluid is hampered is little, and noise is low, at the medium refluence damping check valve that place also can be applicable rapidly.

In order to solve the problems of the technologies described above, the technological scheme that the utility model adopts is:

, comprise valve body, valve seat, flap, valve rod; Described valve body is elliposoidal, bottom in described valve body is provided with valve seat, and the flap and the valve rod that are connected are installed on described valve seat, and the position contacting with flap at valve seat is lined with seal ring, on described flap, helical spring is installed, flap is close to mutually by helical spring thrust and seal ring.

The upper and lower end of described flap is also provided with guide sleeve, between the guide sleeve of lower end and valve seat, by screw, is fixedly connected with.

Compared with prior art, the beneficial effect that the present invention has is:

1, the utility model is installed and is not subject to direction constrain in pipeline, can level install, also can at right angle setting.

2, valve body of the present utility model is elliposoidal, and flap and valve rod be connected, and fluid is during through valve body, and institute's power that is hampered is little, and noise is low.

3, the utility model can be got rid of water hammer harm effectively, in the medium place rapidly of flowing backwards, also can be suitable for.

Accompanying drawing explanation

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

In figure, be labeled as: valve body 1, valve seat 2, seal ring 3, screw 4, guide sleeve 5, flap 6, valve rod 7, helical spring 8.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figure 1, a kind of damping check valve, comprises valve body 1, valve seat 2, flap 6, valve rod 7; Described valve body 1 is elliposoidal, bottom in described valve body 1 is provided with valve seat 2, the flap 6 and valve rod 7 that are connected are installed on described valve seat 2, the position contacting with flap 6 at valve seat 2 is lined with seal ring 3, on described flap 6, helical spring 8 is installed, flap 6 is close to seal ring 3 mutually by the thrust of helical spring 8.

The upper and lower end of described flap 6 is also provided with guide sleeve 5, between the guide sleeve 5 of lower end and valve seat 2, by screw 4, is fixedly connected with.

The utility model is installed and is not subject to direction constrain in pipeline, can level installs, also can at right angle setting; Because valve body of the present utility model is elliposoidal, and flap and valve rod be connected, so fluid is during through valve body, and institute's power that is hampered is little, and noise is low; The utility model can be got rid of water hammer harm effectively, in the medium place rapidly of flowing backwards, also can be suitable for.

Those of ordinary skill in the art will be appreciated that, above embodiment is only for the utility model is described, and be not used as restriction of the present utility model, as long as within the scope of connotation of the present utility model, to the above embodiment's variation, modification, all will drop within the scope of claim of the present utility model.

Claims

1. a damping check valve, comprise valve body (1), valve seat (2), flap (6), valve rod (7), it is characterized in that: described valve body (1) is elliposoidal, bottom in described valve body (1) is provided with valve seat (2), the flap (6) and valve rod (7) that are connected are installed on described valve seat (2), the position contacting with flap (6) at valve seat (2) is lined with seal ring (3), helical spring (8) is installed on described flap (6), and flap (6) is close to seal ring (3) mutually by the thrust of helical spring (8).

2. a kind of damping check valve according to claim 1, is characterized in that: the upper and lower end of described flap (6) is also provided with guide sleeve (5), between the guide sleeve of lower end (5) and valve seat (2), by screw (4), is fixedly connected with.