CN200989478Y

CN200989478Y - Antileakage stop valve

Info

Publication number: CN200989478Y
Application number: CN 200620130225
Authority: CN
Inventors: 鲁学志; 卢振兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-27
Filing date: 2006-10-27
Publication date: 2007-12-12
Anticipated expiration: 2016-10-27

Abstract

The utility model relates to an antiseep check valve for water supply system and drainage system. The utility model contains a left shell and a right shell of the valve body that are formed by the connection of flange or thread; a spherical valve clack is arranged in the valve body and the outer ends of the left shell and the right shell are provided respectively with a water inlet and a water outlet; an annular groove is positioned at the water inlet of the valve body and a seal ring is positioned in the annular groove; an annular groove is positioned at the water outlet of the valve body and the bottom of a spring is clamped in the annular groove; the spherical valve clack is arranged between and contacts the seal ring and the top of the spring. Compared with the prior art, the arrangement of the seal ring prevents the wear caused by the direct contact between the spherical valve clack and the steel valve body and solves the lax seal problem, thereby prolonging the service life about 5 to 10 times; the arrangement of the spring makes the contact between the spherical valve clack and the seal ring tight and improves the sealing reliability of the check valve. The antiseep check valve can be installed and applied not only vertically but also transversely, slantwise and upside and all can prevent flow and leakage of the backwater.

Description

The leakage proof safety check

Technical field

The utility model belongs to the plumbing technical field, relates to a kind of safety check, particularly a kind of leakage proof safety check.

Background technique

Supply and drain water system safety check commonly used has rotary-open type and rise-fall type, establishes a linkage in the Swing check valve, and flap is connected through the hinge and freely leans against on the valve base surface of inclination, and the flap of Lift check valve is located on the sealing surface of seat.During the water forward flow, under the water flow pressure effect, flap is opened, valve opening; During the water reverse flow, under water flow pressure and flap deadweight effect, flap acts on valve seat, stops the water reverse flow.All there are the problem that design is complicated, amount of maintenance is big, working life is short in rotary-open type, Lift check valve.Shortcoming at rotary-open type, Lift check valve, existing ball check valve technology produces, utility model patent " threeway rubber seal damping check valve " (application number 00258828) provides a kind of safety check that utilizes the interior glueballs of valve body as flap, during the water forward flow, water flow pressure promotes glueballs and leaves water intake, current enter from water intake, discharge from water outlet; During the water reverse flow, water flow pressure promotes glueballs and moves to water intake, and glueballs compresses water intake and stops the water adverse current.There are two shortcomings in this safety check: the one, and only depend on adverse current water pressure pushing glueballs to be pressed on the water intake and seal, little and when unstable, sealing effect is poor in water flow pressure, the backwater seepage is serious during use; The 2nd, glueballs and valve port are line contact sealing, and particularly with the friction of steel valve seat, the glueballs wearing and tearing are very fast, and valve member is short working life, and sealing reliability is poor.

Summary of the invention

The purpose of this utility model provides a kind of leakage proof safety check that seals reliable and long service life.

For achieving the above object, the utility model leakage proof safety check has the left and right housing by the flange or the formation valve body that is threaded, and valve body is built-in with globe disk, and the outer end of left and right housing has entery and delivery port respectively; There is a circular groove water inlet in the described valve body, in this circular groove seal ring is installed; There is a circular groove at the water outlet place in the described valve body, and spring bottom snaps in this circular groove, and described globe disk contacts with the spring top between seal ring and spring top and with seal ring.

Described seal ring adopts rubber parts.

Described valve body, globe disk all can adopt nylon spare or moulding.

The water outlet of described valve body can be provided with more than one.

The utility model is owing to be provided with seal ring and spring respectively at body cavity entery and delivery port place, globe disk places between seal ring and the spring top, with respect to prior art, the setting of seal ring has avoided globe disk to cause wearing and tearing with direct contact of steel part valve body, solve poorly sealed problem, can improve 5～10 times working life; The setting of spring makes globe disk contact closely with seal ring, has improved the sealing reliability of safety check.

Description of drawings

Fig. 1 is the utility model structural representation

Embodiment

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

As shown in Figure 1, the valve body of leakage proof safety check is by left shell 1, right shell body 2 connects and composes by flange, valve body is built-in with rubber, the globe disk 3 that nylon or plastics are made, there is water intake 4 outer end of left shell 1, the outer end of right shell body 2 and the upper right corner have water outlet 5 respectively, 6, water intake 4 places are provided with circular groove 7 in the left shell 1, in the circular groove 7 rubber is installed, the seal ring 8 that nylon or plastics are made, water outlet 5 places are provided with circular groove 9 in the right shell body 2, spring 10 bottoms snap in the circular groove 9, globe disk 3 places between seal ring 8 and spring 10 tops, contacts with spring 10 tops with seal ring 8.Entery and delivery port is respectively arranged with flange and is used for being connected with pipeline or pipe fitting.

Working procedure: during forward flow, water flows into from the water intake 4 of left shell 1, the elastic force that water flow pressure promotion globe disk 3 overcomes spring 10 moves right globe disk 3 spring 10 compressions, globe disk 3 disengages with seal ring 8, be valve opening, current enter valve body and flow out from the

water outlet

5,6 of right shell body 2.When stopping into water or intake pressure less than pressure of return water, the return pressure of spring 10 and pressure of return water acting in conjunction promote globe disk 3 left, and globe disk 3 is closely contacted with seal ring 8, be valve closing, can prevent effectively that backwater from flowing out and seepage from water intake 4.Under the spring force effect of spring 10,, can not make globe disk 3 depart from valve seat and cause that safety check lost efficacy from the pressure of return water of one or more water outlets.Simultaneously, this safety check has reliable mobile guide, thereby not only can vertically install because globe disk 3 block all the time and touches in the end of spring 10, also can be horizontal, tilting or be inverted and install and use, can both prevent the mobile and seepage of backwater reliably.

When the utility model is applied on the less caliber pipeline, between left shell and the right shell body and also can be between the entery and delivery port of valve body and pipeline or the pipe fitting by being threaded.Valve body water outlet quantity can be provided with as required.

Claims

1, a kind of leakage proof safety check, have by flange or be threaded and constitute the left shell (1) of valve body, right shell body (2), valve body is built-in with globe disk (3), left shell (1), the outer end of right shell body (2) has water intake (4) respectively, water outlet (5), it is characterized in that: there is a circular groove (7) water inlet in the described valve body, seal ring (8) is installed in the circular groove (7), there is a circular groove (9) at the water outlet place in the described valve body, spring (10) bottom snaps in the circular groove (9), and described globe disk (3) is positioned between seal ring (8) and spring (10) top and with seal ring (8) and contacts with spring (10) top.

2, leakage proof safety check as claimed in claim 1 is characterized in that: described seal ring (8) adopts rubber parts.

3, leakage proof safety check as claimed in claim 1 is characterized in that: described valve body, globe disk (3) all can adopt nylon spare or moulding.

4, leakage proof safety check as claimed in claim 1, it is characterized in that: the water outlet of described valve body can be provided with more than one.