SU1076681A1 - Ball cock - Google Patents

Description

2, Crane according to claim 1, distinguished-communicated by channels in the network with the source

u and with the fact that the internal cavity of the lubricant and the contact area of the annular vyokopytsevogo groove is filled with lubricant and the plug and the annular groove.

1076681

The invention relates to pipe fittings and can be used & t but to overlap the flow of working slits containing abrasive inclusions. Known ball valve, seal-. However, when the valve is in the open position, sealing elements may be subject to abrasive wear. Closest to the proposed technical essence is a ball valve containing a ball stop plug installed in the housing with trunnions and forcibly movable seats with G2 sealing rings. In this valve, the sealing rings are not protected from the working environment and are subject to both abrasive wear and wear due to friction. The purpose of the invention is to reduce the wear of the sealing kapets and increase tightness. This goal is achieved by the fact that in a ball valve containing a ball stop valve with trunnions installed in the housing and forcibly movable seats with sealing rings, an annular groove is made on the end surface of the saddles on the side of the plug, the Haeolco surfaces of which have juxtaposed sealing rings , in the cavity of the groove there is a protective ring which is spring-loaded in the direction of the plug, and on the stop plug there are annular protrusions mating with annular slots, with the plug open and closed. In addition, the internal cavity of the annular groove is filled with lubricant and message & on the channels in the saddle with a source of lubricant and a zone of contact between the annular projections of the plug and the annular groove. FIG. 1 shows a ball valve, general view; in fig. 2 - the node in figure 1. In the ball valve housing 1, having an inlet 2 and outlet 3 nozzles and covers 4, 5, a stopper 6 is installed with two pairs of annular projections 7. The trunnions 8 and 9 of the ball valve rest on the bearings 10, which are protected by sealing assemblies made of metal rings 11 of the shaped ring 12 and cuff 13. The middle cover 14 has an additional seal 15. In the nozzles 2 and 3 there are movable saddles consisting of a metal housing 16, body seals 17, a movable ring 18 installed in a stepped annular groove 19 seat, O-rings 20, 21 lubrication system. The movement of the ring 18 is provided by the spring 22. The principle of operation of the rolling seat is as follows. When the ball shutter is stationary in the Open or Closed position by the pressure of the medium P, coming from an external source, the seat under. presses against the surface of the ball valve with annular protrusions 7. The secondary ring 18, compressing the pin 22, opens the seat seals encompassing the lateral surfaces of the annular ball valves. Through the system 21, the lubricant is supplied to the contact zone from the inner cavity of the annular groove 19. When the ball valve is rotated from the Open position to the Closed position, the seat is pressed from the surface of the annular projections by the force created by the pressure of the medium P, the movable ring 18 closes the seal 20. Advantage of the proposed The device consists in the fact that penetration of the corrosive-corrosive environment to the sealing element and the effect of abrasive particles on the sealing surface are practically excluded. Brevity of contact material

31О766814

Aggressively corrosive sealants provide increased tightness and

Srayoy and safety of the foremost on the ballroom

cleanness of the surface of the depressurization crane.

I,

sixteen

nineteen

18

22

21 Thebes. 2

Claims (2)

57) 1. A BALL VALVE, containing a ball 'stopper plug with trunnions installed in the body and an integral-sliding seat with sealing rings, which is notable for the fact that, with a chain for increasing valve tightness and reducing wear of the sealing rings, on the end surface the seats on the cork side have an annular groove, on the lateral surfaces of which the aforementioned sealing rings are placed, a protective ring spring-loaded in the direction of the cork is installed in the groove of the cork, and annular protrusions are made on the locking plug, mating grooved with annular grooves, with open and closed. tube positions. 2, The crane according to claim 1, characterized in that the inner cavity of the annular groove is filled with lubricant and communicated by channels in the assembly with the lubricant source and the contact zone of the annular protrusions of the tube and the annular groove.