SU1560867A1 - Device for sealing pipeline when replacing ball cock - Google Patents

Abstract

The invention relates to auxiliary shut-off means of pipelines and can be used in their repair. The purpose of the invention is to improve the reliability of sealing and service life. The device comprising a housing 1 connected to the valve 2 with a hollow rod 7 and a rod 12 is provided with a guide sleeve 4 fixed in the case 1 by a clamp 6 of the axial position of the sleeve 4, a locking member in the form of a collet sleeve 10 and a disk element 13 installed with contact with the inner surface of the sleeve 10, and provides control of the reliability of the sealing of the pipeline 3 before dismantling the housing 1 and the crane 2. 1 Cp f-ly, 4 ill.

Description

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The invention relates to auxiliary shut-off means of pipelines and can be used in their repair.

The purpose of the invention is to improve the reliability of sealing and service life.

FIG. 1 shows the proposed device for sealing the pipeline when replacing the ball valve, a general view; in fig. 2 - section AA; in fig. 3 is a section BB in FIG. one; in fig. 4 - valve in the form of a collet bushing.

The device for sealing the pipeline when replacing the ball valve includes a housing 1 connected to the ball valve 2 installed in the pipeline 3. Inside the housing 1, a guide bushing 4 with a female thread is installed along a sliding fit, on the outer surface of which an annular a recess 5, part of which has an additional recess for the retainer 6, an axis-south position of the sleeve 4. The sleeve 4 has a 1-end hollow rod 7 with an external thread, one end of which is made with a hexagon 8 under the wrench, at the other end a rod 7 having a shoulder 9 is rigidly secured with a locking member made in the reed of the collet sleeve 10 enclosed by an elastic sealing ring 11. In the cavity of the rod 7 a rod 12 is placed, on the inner end of which the disk element 13 is capable of contacting the inner surface of the collet tulk ten.

A nut 14 is installed at the outer end of the stem 12, having a thread, with the possibility of contact with the rod end. In places of interaction of the hollow rod 7 and the stem 12, gaskets 15 are installed at one end, Square hole is made at the other end in the rod 7, and on the stem 12, the outer surface is made in the form of a square. In the lower part of the housing 1 is made drain hole, plugged with a threaded sleeve 16.

The ball valve is replaced as follows.

The housing 1 of the device is connected to a valve 2 installed, for example, in the drain pipe 3 of a tank for storing oil products filled above the level of the drain pipe 3. With the valve 2 closed, the clamp 6 is located in the recess of the sleeve 4, thereby preventing its axial movement , and the plug 16 is screwed into the drain hole.

The valve 2 is opened (gaskets 15 prevent leakage of oil products) and the hexagon 8 is rotated with a wrench until the rod 7 with the locking member 10 and the elastic sealing ring 11 is in the pipeline 3, the valve 2 has passed

Fixing the hexagon 8 with a wrench, rotate the nut 14, while the rod 12 moves in the axial direction, and the disk element 13 expands the collet sleeve 10 with the elastic sealing element 11, which presses against the wall of the pipeline 3, closing it. In order to make sure that the pipeline 3 overlaps reliably, a retainer 6 is withdrawn from an additional recess in the annular recess 5. In this case, if the sleeve 10 is not sufficiently pressed to the pipeline 3, the sleeve 4 is pushed out of the opening of the housing 1 by the fluid by the amount of the sleeve 5. 4. This indicates the need to repeat the operation. With reliable overlapping of the pipeline 3, the retainer 6 is withdrawn from the annular recess 5. Part of the oil products entering the device body 1 is removed through the drain hole, unscrewing the plug 16. Then the body 1 and valve 2 are dismantled. After repairing the crane 2, it is installed in the pipe 3 putting on the protruding end of the device, the body 1 is connected to the crane 2 and the device is dismounted.

The device provides control of tightness before dismantling the housing 1 and the crane 2. The service life of the device is increased due to repeated use of the collet sleeve 10.

Claims (2)

1. A device for sealing a pipeline when replacing a ball valve, comprising a housing attached to the valve, a hollow rod with an external thread and a locking body at its end and a rod with a nut, located inside the rod with axial movement, which can be installed contact with the end of the rod at the end of the rod opposite to the locking member, characterized in that, in order to increase the sealing reliability and service life, the device is equipped with a guide bushing with internal thread, The axial position of the sleeve fixed in the housing and the disk element mounted on the inner end of the stem are made as a collet sleeve surrounded by an elastic sealing ring, the hollow rod with the rod is screwed into the guide sleeve, and the disk element is installed to be in contact with the inner collet sleeve surface. 2. The device according to claim 1, characterized in that a drain hole is made in the body, plugged with a threaded plug. Rig. 2 6-6 12 12 eight Pae.j