CN2120936U

CN2120936U - Easy open-close anti-leak ball valve

Info

Publication number: CN2120936U
Application number: CN 92215415
Authority: CN
Inventors: 高行先
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-13
Filing date: 1992-04-13
Publication date: 1992-11-04

Abstract

The utility model provides an anti-inner-leakage ball valve of easy opening and closing, which is characterized in that the upper end and the lower end of a ball core are respectively provided with a cam whose exterior is separately sheathed with a liner ring. When a handle conducts closing and opening movement, the ball core and the cam are driven to rotate, and the cam and the liner ring conduct relative movement to control the pressing force between the ball core and the sealing ring; thus the opening and the closing are labor saving and also the sealing function and the anti-inner-leakage function can be obtained; meanwhile, the valve body structure is improved. The upper part of the valve body is provided with a ball core cover and the two ends of the valve body are combined by an upper body and a lower body, which is convenient for disassembling and assembling and repairing, and the work efficiency is improved.

Description

Easy open-close anti-leak ball valve

The utility model relates to a kind of valve, is specially adapted to ball valve.

One of problem that valve is in use common is to leak, and it is the main cause that valve internal leaks that sealing surface damages, and the valve body rigidity is not enough to be connected with sealing surface and badly also can to cause leakage.In order to prevent internal leakage, prior art has adopted the pretightening force that strengthens ball core and seal ring, has improved sealability, but has brought hoisting capacity apart from big, the operation effort.Therefore the size and the internal leakage of hoisting capacity have formed a pair of contradiction, and the approach of resolving contradiction is how to improve sealing configuration, and this is the important topic of valve industry.

The purpose of this utility model provides a kind of ball valve, and it can make keying laborsaving, can prevent internal leakage effectively again.

The utility model is achieved in that it by valve body, flange, and the ball core, rubber ring, O type circle, seal ring, valve rod, handle is formed, and respectively is shaped on a cam in the top and bottom of ball core, and cam respectively is with a lining ring outward.

When handle is done to open and close rotation, drive ball core and cam and rotate together.Cam and lining ring are done relative movement, control the left and right displacement amount of ball core, force of sliding friction between ball core and seal ring is increased thereupon or reduce.Ball core and seal ring are issued to sealing to prevent internal leakage in the impacting force effect.

The utility model is because the employing cam is controlled the impacting force between ball core and seal ring, and is laborsaving when making keying, improved sealability, prolonged the working life of seal ring.Owing to improved valve body structure, be convenient to the mounting or dismounting maintenance simultaneously, improved work efficiency.

Fig. 1 is a structural drawing of the present utility model.

The utility model is described in further detail below with reference to drawings and Examples.

With reference to Fig. 1, there is a ball core cap 7 top of valve body 1, and tightens up mutually with valve body by screw, adopts the ball core cap to make ball core 3 directly put into or to take out from the lid mouth, is convenient to assembling or more change the shuttle core 3 and seal ring 6.Valve upper body 12 is arranged at the top at valve body two ends, and conjuncted 13 is symmetrical under valve upper body 12 and the valve, and flange 2 is fastened by hinge 15 and bolt 14 under valve upper body 12 and the valve between conjuncted 13.If will in pipeline, take off valve, as long as unscrew bolt 14, open the valve upper body, valve body is separated with flange, be convenient to mounting or dismounting or maintenance like this.Owing to improved structure, shortened the operating time, improved working efficiency.The upper and lower end of ball core respectively is shaped on a cam 9 and 17, is with a lining ring 8 outside the cam 9, is with a lining ring 16 outside the cam 17.Handle with sleeve 11 makes valve rod 10 drive ball core and cam rotation, the relative movement of cam and lining ring.With less hoisting capacity, make 6 bigger impacting forces of generation of ball core and seal ring, reach the effect that seals and prevent internal leakage.5 compressions of O type rubber ring, rubber ring 4 are used for pad to prevent the leakage between flange and the valve body.

Claims

1, the anti-internal leakage ball valve of a kind of easy keying, by valve body 1, flange 2, ball core 3, rubber ring 4, O type circle 5, seal ring 6, valve rod 10, handle 11 is formed, it is characterized in that: in the top and bottom of ball core 3 cam 9 and 17 are arranged respectively, be provided with a lining ring 8 outside the cam 9, be provided with a lining ring 16 outside the cam 17.

2, ball valve according to claim 1 is characterized in that the top of valve body 1 is provided with a ball core cap 7.

3, according to claim 1 and 2 described ball valves, it is characterized in that valve upper body 12 is arranged at the top at valve body two ends, conjuncted 13 is symmetrical and be connected with bolt 14 by hinge 15 under valve upper body 12 and the valve.

4, ball valve according to claim 1 is characterized in that flange 2 is under valve upper body 12 and the valve between conjuncted 13.