CN2148230Y

CN2148230Y - Check ball valve

Info

Publication number: CN2148230Y
Application number: CN 93203612
Authority: CN
Inventors: 姜桂林
Original assignee: Longjiang Mudanjiang Water Supply Equipment Factory
Current assignee: Longjiang Mudanjiang Water Supply Equipment Factory
Priority date: 1993-02-17
Filing date: 1993-02-17
Publication date: 1993-12-01
Anticipated expiration: 2003-02-17

Abstract

The utility model discloses a check ball valve which comprises a non-return end flange, a valve body, a ball end flange, a ball body, non-return flaps, etc. The non-return flaps are positioned at the inside of the valve body between the non-return end flange and the ball body, the non-return flaps can move parallelly, and the non-return flaps have the function for preventing the non-return flow. The utility model has the advantages of compact structure, low cost, and wide range for using.

Description

Check ball valve

The utility model belongs to a kind of valve in the pipework.

At present, the ball valve of installing and using in pipeline only has the switching effect usually, does not have the non-return effect of flowing backwards of preventing, flows backwards in order to prevent liquid, also needs to install a safety check, to play the non-return effect.Like this, when as installed, workload is bigger, have time-consuming, cost is high, shortcoming such as big takes up space.

The purpose of this utility model provides a kind of ball check valve that prevents that liquid from flowing backwards.

Technical solution of the present utility model is the valve inner at ball valve, and installing one between non-return end flange and the spheroid additional can parallel mobile non-return flap, to play the non-return effect.

The utility model is compared with the existing situation that safety check and ball valve are installed respectively, has reduced installation procedure, has compact structure, and installation workload is little, and the advantage that cost of production is low has wider application area and high economic benefit.

The utility model will be further described below with reference to drawings and Examples.

Fig. 1 is the structure sectional view of ball check valve.

Fig. 2 is that the B of Fig. 1 is to sectional view.

With reference to Fig. 1, the basic structure of present embodiment is made up of non-return end flange (1), valve body (5), spheroid (7), pommel flange (15).A non-return flap (3) is arranged in the valve body (5), and it is positioned between non-return end flange (1) and the spheroid (7), can parallelly move, and it realizes the non-return effect jointly with the non-return valve port (2) that is fixed on the non-return end flange (1).Between non-return end flange (1) and the valve body (5) asbestos packing (4) is housed, can prevents liquid leakage.Ball valve valve port (6) on the valve body (5) is finished on-off action jointly with spheroid (7).Spheroid (7) links with the lower end of ball valve valve rod (8), inclination pressure pad (9) and graphite packing (10) are housed between ball valve valve rod (8) and valve body (5), filler pressure cap (11) is housed in the graphite packing (10), handle (12) is fixed on the upper end of ball valve valve rod (8), the switching of rotatable handle may command spheroid (7) by hex head bolt (13) and packing ring (14).The inner thread of pommel flange (15) screws mutually with the adjustment cover (17) that an outer wall has screw thread, the inwall of adjusting cover (17) has two projections, by these rotatable adjustment covers of two projections (17), to reach the effect of regulating spheroid (7) and ball valve valve port (6) gap, prevent to leak.Between the outer wall of the inwall of pommel flange (15) and adjustment cover (17) an O type ring is housed,, has played seal action to prevent leak of liquid.

Claims

1, a kind of ball check valve is made up of non-return end flange (1), valve body (5), spheroid (7), ball valve valve rod (8), handle (12), pommel flange (15), and it is characterized in that being equipped with in valve body (5) one can parallel mobile non-return flap (3).

2, ball check valve according to claim 1, it is characterized in that being provided with in pommel flange (15) its outer wall thread can screw in order to regulate the adjustment cover (17) of ball valve valve port (6) mutually with pommel flange (15) inner thread.

3, ball check valve according to claim 1 is characterized in that the inwall of adjusting cover (17) has two projections, adjusts cover (17) in order to rotation.

4, ball check valve according to claim 1 is characterized in that between the inwall of adjusting cover (17) outer wall and pommel flange (15) O type ring (16) being housed, in case stopping leak leaks.