SU1523815A1 - Ball valve - Google Patents

Abstract

The invention can be used as a closure member for working with liquid and gaseous media at pressures up to 40 MPa. The purpose of the invention is to increase the reliability of the ball valve. In the housing 1 with inlet and outlet fittings 2, 3 between the axially spring-loaded seats 4 with seals 7 there is a spherical plug (P) 5. P 5 has an upper support in the form of a spindle 8 with an annular collar 9 and a lower support 14 located in bore P 5 and associated with it by means of a ball. The ball is placed in the nest of the insert (B) 17, located in the mechanical deepening of the support 14 and in the central conical recess of the boring of P 5. The 17 is made of elastomeric material, the nest in it is in the form of a longitudinal groove 18. Both supports 8, 14 are installed with radial bearing clearance. Between the support 14 and the bore P 5 an end gap is formed, the value of which is greater than the value of the elastic deformation. A spindle 8 is fitted with a nut 11, which is in contact with the collar 9 through the anti-friction rings 10. The spindle 8 consists of parts located one with respect to the other with an end gap, the magnitude of which is larger than the elastic deformation value. The impact of the working medium on the П 5 is perceived by part 20, which prevents the spindle 8 from twisting. 1 hp ff, 3 ill.

Description

wearing to the other with a face gap, the values of which are larger than the non-elasticity of the elastic forms. Impact working

the medium on II 5 is perceived by part 19, which prevents the spindle 8 from twisting. 1 ep f-ly, 3 ill.

The invention relates to reinforcement and can be used as a shut-off member for working with liquid and gaseous media at pressures of up to 40 Mlla, especially in systems where a large amount of cranes is required.

The purpose of the invention is to increase reliability by providing self-installation of the proca in the bearings relative to the seal assemblies.

Figure 1 shows the crane, a longitudinal section; figure 2 - section aa in figure 1; on fig.Z - top support crane.

The ball valve 11 contains a body t with an inlet 2 and an outlet 3 with nozzles, inside which a spherical plug 5 is installed between the saddles 4. The saddles 4 are spring-loaded in the axial direction by springs 6. In the saddles 4 there are tight slots for seals 7. The stopper 5 has an upper support in the form a spindle 8 with an annular collar 9, through which the gland nut 11 rests against the anti-friction rings 10. The nut 11 is sealed on the spindle B by seals 12. In the bore 13 of the plug 5 with the end clearance about the bottom bearing 14 is positioned loosely

with her by means of a ball 15,

There is an elastomer compensating insert 16 on the surface of the support 14, which has a nest under the ball 15 on its surface. plugs 5 at stanoplena with radial clearances with respect to bearings. In the bore 13 of the plug 5, there is a conical buckling 18 under the ball 15 located at the same time as the opposite side in the slot 17 of the liner 16. A superstructure of the plug 3 should be installed. At the same time, the interval of 8 tons is made composite. One of the mates: parts - top part 19 of shimplem B containing annular

Q

five

0

,

collet 9, - is made with a central conical recess 20 under the ball 15, and in the bore 21 of the other part 22 of the spindle B there is an elastomer insert 16. The component parts of the spindle 8 are located in relation to each other with an end clearance S, which is larger than the elastic liner deformations 16.

Crane works as follows.

Torque is transmitted from the drive through the spindle in the spherical plug 5. The stop of the collar 9 of the spindle 8 to the gland nut 11 through the anti-friction rings 10 reduces the amount of torque required to operate the crane. Seals 12 on spindle B prevent the valve from gas leakage to the outside.

Installing the plug 5 with an end clearance S relative to the lower support 14 and the location of the upper and lower supports with radial clearances relative to the bearings allows the plug 5 to move within this gap, the seals 7 are installed along the plug 5. The plug 5 is installed along the vertical axis by means of nuts 11, which is due to the presence of the elastomer liner 16, which also eliminates the clamping of the plug 5. When the nut 11 is pressed, all the gaps are selected along the vertical axis, and the axle of the axle 5 is aligned with the axis seals 7, thus ensuring their uniform fit on the cork 5. Turning in the bearings 90 together with the spindle 8, the cork 5 opens or shuts off the flow of the working medium (gas) in the pipeline. The seals 7 tightly pressed against the closed cork 5 prevent the overflow of the working medium from the pipeline section under pressure to the section protected from the flow of the working medium. Turning the plug 5 on the ball 15, which is freely located in the socket - the conical cavity 1B, also reduces the

torque required to operate the crane.

The ball 15, moving in pitch 7, allows the cork 5 to move the piston to the longitudinal axis of the crane when pressure is applied, first selecting gaps for all movable joints with the cork 5 and the casing 1, then the seals 7 are installed over the cork 5 thanks to the mobility of the saddles 4 on the springs 6.

In the case of a spindle 8, the composite ball 15 and the insert 16, installed between its component parts 19 and 22, perform the same function described above, with the only difference that in this case only the integral part 19 of the spindle perceives the effect of the working medium on the plug 5 8, which prevents it from twisting.

Claims (2)

1. A ball valve, comprising a housing with inlet and outlet fittings, in which a spherical plug is placed between axially spring-loaded seats with seals, fitted with an upper spindle bearing with an annular collar and a bottom mounted in bearings s Q 50 0 a plug and a shield with it by means of a ball placed at the socket of the plc dr. ptg located in the end recess of the support and in the central conical recess of the plug bore, characterized in that the liner is made of elastomeric material , and the nest in it is in the form of a longitudinal groove, and both supports are installed with a radial clearance relative to the bearings, an end gap is formed between the lower support and the bore of the plug, the value of which is greater than the elastic deformation of the liner, and on the spindle, a gland nut is installed, which is in contact through the anti-friction rings with its collar. 2. A crane according to claim 1, characterized in that the spindle is made composite, one of the mating parts containing an annular shoulder is made with a central conical recess under the ball, and an elastomer insert is installed in the bore of the other, and the components of the spindle are arranged in relation to one the other with an end gap, the magnitude of which is larger than the elastic deformation {and liner. / 7 1 Fib. 19 l 20 15 sixteen