SU1580105A1 - End face elastic packing member - Google Patents

Abstract

The invention can be used to seal fixed quick-release couplings. The purpose of the invention is to increase the reliability of compaction. A rigid annular plate 5 is installed in the body of the working end 2 of the elastic cuff 1 with the hole 3 and the annular protrusion 4. Its outer diameter is not less than the inner diameter of the cuff 1. This prevents the working end 2 from bending inside the cuff 1, preserving the sealing effect of the area difference S S 1 - the inner surface of the working end 2 and the area of the circle covered by the outer diameter of the annular protrusion 4. 2 Il.

Description

FIG. 7

The invention relates to a sealing technique and can be used to seal stationary quick disconnect joints, for example, to supply a working medium when testing hollow articles for strength and tightness,

The purpose of the invention is to improve the reliability of the seal when there is an annular protrusion with an outer diameter smaller than the inner diameter of the cuff at the working end of the cuff by preventing the cuff from bending and flowing

Figure 1 shows the structure of the end elastic sealing element; Fig. 2 is a diagram of the use of a sealing element in a device for testing internal pressure of hollow articles

The end elastic sealing element contains an elastic cylindrical cuff 1, the working end 2 is made with a central hole 3 and an annular protrusion 4 In the body of the working end 2 there is a rigid annular plate 5, the outer diameter of which is greater than or equal to the inner diameter of the cuff 10

A device for testing hollow articles with internal pressure, in which an end sealing element is used, consists of a bed 6 connected by four columns 7 with a cross-bar 8 A double hydraulic cylinder 9 having a fixed rod-piston 10 with a channel 11 and a movable rod-piston are mounted on the cross bar. 12, to which pins I3 is attached to a block 14 of seals, the spherical surfaces of which and the piston rod 10 compensate for deviations from the non-parallelism of the surfaces of the test article 15 o End mechanical sealing elements 16 and 17 are fastened in the slots of the block 14 with screws 18 and 190. The screw 18 provides a channel 19 for supplying the test medium. The channel 20 of the block 14 of the seals is connected to the hole 21 of the cylinder body 9 via a non-return valve 22. The hole 23 is provided in the cylinder body 9 working environment.

The end elastic sealing element in the composition of the device for testing hollow articles works as follows.

The working medium (air, oil) is supplied to the channel 11 and the movable piston rod 12 moves downward until the seal block 14 comes into contact with the outer surface of the test article 15 o. At the moment the piston piston 12 moves downward, the test medium enters the upper cavity of the cylinder 9 due to the vacuum that occurs there, the channel 20 is closed by a check valve 22. At the end of the movement, the outer surfaces of the elements 16 and 17 are in contact with the coherent surfaces of the test article 15, creating a preliminary seal

Through the channel 20 and the internal cavities of the test product 15, the test medium enters the chamber 1 of elements 16 and 17 and acts on their working end 2, in contact with the sealed product 15, with a force determined by the pressure of the medium and the area difference S and S ,, - the inner surface of the working end 2 and the area of the circle covered by the outer diameter of the annular protrusion 4 "

In the absence of a rigid annular plate 5, the working end 2 can bend inward, the area difference will disappear and the effect of the internal sealing forces disappears.

A rigid plate 5, located at the working end 3, prevents deflection and flow of the cuff 1 and ensures that there is a difference in area S and Sd at the time of testing by preventing the seal material from flowing from pressure forces

In order to keep the compactor unit 14 in the working position during the test, test medium is supplied to the hole 21 of the cylinder 9

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To return the device to its original position, the channel 11 is connected to the drain (atmosphere), and the working medium is fed into the hole 23. Hole 21 is connected to a drain for the test medium.

Claims (1)

Invention Formula The end elastic sealing element in the form of an elastic cylindrical cuff with a central hole in the working end, characterized in that, in order to increase the reliability of the seal when 515801056 the presence on the working end of the annular tapered coaxially in the body of the working ledge with an outer diameter less than the end face, with an outer diameter of not less than the inner diameter of the cuff, it provides the inner diameter of the cuff ,, wives with a rigid annular plate, mustache, P eight