RU183269U1 - DEVICE FOR REMOVING FLANGES OF THE BALL VALVE DU 500 FOR REPAIR OF SEALING THE HOUSING-FLANGE - Google Patents

Abstract

The utility model relates to releasable clamping devices for securing pipeline structural elements with shutoff valves and is intended to replace the ball-valve seal of a ball valve. A device for expanding flanges of a ball valve DN 500 when repairing a valve-body seal, consisting of two identical metal half-clamps, interconnected by bolts with nuts, each half-clamp consists of a base and two welded ribs, two shoes with Nost move, using bolts and nuts device fixed on the ball valve, ball valve to shift flange use screws bearings fitted with the squeeze gaykami.Tehnichesky result: increased safety, simplification of the design tools and a significant reduction in the cost of repairs.

Description

The utility model relates to the gas industry and is intended to replace a failed seal in the body-flange joint of a ball valve without cutting it out of the gas pipeline.

A known method of eliminating a gas leak through flange connections of gas pipelines, in which on the outside of the flange in its lower part a technological hole is made to its interflange cavity, an additional valve is fixed in it, it is closed and a syringe pre-filled with a self-vulcanizing sealant is attached to it. Another technological hole is made in the upper part of the flange, in which a second additional valve is fixed, then both valves are opened, an annular gasket is introduced into the interflange space from the outside of the flange, and a retaining ring is put on the flange connection across the axis of the pipeline. A self-vulcanizing sealant is introduced into the wafer joint through an additional valve installed in the lower part of the flange, after the appearance of the sealant at the outlet of the second additional valve, the latter is closed and the pressure of the introduced self-vulcanizing sealant is created, which exceeds the gas pressure in the gas pipeline. After self-vulcanization of the sealant, the second additional valve is removed and the hole is closed (see the description of the invention to RF patent No. 2268438, IPC F16L 55/16, publication January 20, 2006).

In this known method, the following technical equipment is used:

- Technical device for making two holes;

- Two additional cranes;

- ring gasket;

- Bandage ring;

- A syringe.

The disadvantage of this known method is the use of the above technical equipment, which complicates the design.

A known method of eliminating gas leaks through flanged joints of ball valves DN 50-500 is that ball valves are cut from gas pipelines, dismantled detachable joints, change seals, assemble a valve and cut it back into the gas pipeline. ("Shut-off valves with ball valves produced by the plant," Tyazhpromarmatura ", USSR, Gorky: MGP USSR 1977)

The disadvantage of this known method is the use of a large number of complex technical equipment and machines: cutting machines, cranes, welding equipment and equipment for monitoring welded joints.

A known method of mounting the shutter of a ball valve in the housing, which consists in the fact that the housing is mounted on supports and can rotate the shutter, consisting of a spherical part of the king pin having a common bore, as well as sealing nodes in contact with the sealing surfaces with the spherical part of the shutter, whose saddles have secondary seals made in the form of welded corrugated membranes and movable in the axial direction within their permissible plastic deformations with compression by the springs to the sides gate, wherein the valve body operate integral with the upper connector cover. First, the sealing assemblies are installed in it, after which, through the upper connector of the cover, a spherical part is installed, previously rotated 90 degrees from the working horizontal position to a vertical position in the nodes of rotation of the technological equipment, which is fixed on the end of the case with a subsequent turn inside the case into the working the position is “open”, and then the pivot part and the upper support, moreover, to ensure a mounting gap with a shutter, the seats are moved apart within the allowable plastic deformations corrugated membranes by supplying a medium under pressure from an external source to the collector of the bellows unit, which is part of the sealing assembly, by means of a process pipeline (see the description of the invention to RF patent No. 2629317, IPC F16K 5/06, publication 08/28/2017).

The disadvantage of this method is the complexity of the design of the device.

The closest analogue to the claimed device was not found.

The objective of the claimed utility model is:

- Improving occupational safety;

- Simplification of the design of the device;

- Reducing the cost of repair of a ball valve;

- Decrease in time for repair of the spherical crane.

The essence of the claimed utility model is as follows: A device for expanding the flanges of a ball valve DN 500 when repairing the body-flange seal, consisting of two identical metal half-clamps, interconnected by bolts and nuts, each half-clamp consists of a base and two welded ribs, two shoes are installed on the ribs with the help of movable bolts, with the help of bolts and nuts the device is fixed on the ball valve, thrust screws with mounted on them are used to displace the flange of the ball valve squeezing nuts.

The essence of the claimed utility model is illustrated by drawings, where:

in FIG. 1 is a three-dimensional image of a device for expanding the flanges of a ball valve DN 500 mounted on a ball valve during repair of the body-flange seal (nuts and studs are not shown conditionally);

in FIG. 2 is a general view of a device mounted on a ball valve;

in FIG. 3 - section of the fixture and ball valve;

in FIG. 4 - view A;

in FIG. 5 - half-clamp device.

The device for expanding the flanges of the ball valve DN 500 during the repair of the “body-flange” seal consists of two identical metal half-clamps 1, interconnected by bolts 2 with nuts 3, while each half-clamp 1 consists of a base 4 and two welded ribs 5. On the ribs 5 with the help of bolts 6 installed two shoes 7 with the ability to move. Using bolts 2 and nuts 3, the device is fixed on a ball valve. To shift the flange 8 of the ball valve 9 we use the stop screws 10 with the squeezing nuts 11 mounted on them. The device works as follows:

Before installing the half-clamps 1 on the skirt 12 of the ball valve 9, it is necessary to determine the location of the four diametrically opposite pins 13, which are unscrewed, and in their place the stop screws 10 with the screw-off nuts 11 are screwed in. The stop screws 10, in the process, abut the bottom 14 of the blind hole in the body of the ball valve 9.

Two half-clamps 1 are mounted on the skirt 12 and are pulled together through flanges 15 by bolts 2, washers 16 and nuts 3, while under the shoes 7, gaskets are placed under the shoes 7 in the gap between the pipe 17. All nuts 18 are unscrewed from the studs 19 of the ball valve eight mm from the flange 8. Holding the stop screw 10 with the key, unscrew the squeezing nut 11 with the second key, thereby opening the joint “flange-body” 20 at the same distance of eight mm. Change the sealing element 21.

Assembly of the crane is carried out in the reverse order.

As a result of the use of the Tool for expanding the flanges of a DN 500 ball valve during the repair of the “body-flange” seal, it was possible to repair the ball valve without cutting it from the gas pipeline.

Effect: increase safety, simplifying the design of the device and a significant reduction in the cost of repair.

Claims (1)

A device for expanding the flanges of a ball valve DN 500 during the repair of the “body-flange” seal, consisting of two identical metal half-clamps, interconnected by bolts and nuts, each half-clamp consists of a base and two welded ribs, two bolts are installed on the ribs with bolts shoes with the ability to move, with the help of bolts and nuts, the fixture is fixed on the ball valve, to stop the flange of the ball valve use thrust screws with wring nuts mounted on them.

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