RU218629U1 - PLUG - Google Patents

Abstract

The utility model relates to the field of the gas industry and can be used in the maintenance and repair of ball valves to eliminate gas leakage in case of leaks in the fittings for supplying lubricants and sealing materials. The objective of the utility model is to provide the possibility of eliminating gas leaks from fittings for supplying lubricants and sealing materials with a semicircular ("push-button") head due to leakage of the check valve. The technical result of the utility model is the development of a plug design for attaching it to fittings for supplying lubricants and sealing materials with a semicircular ("push-button") head without using a threaded connection. The problem is solved, and the technical result is achieved by installing a plug, consisting of a body and a locking element, characterized in that the body and the locking element are connected by a threaded connection, while a groove is made in the body, and the locking element is made in the form of a bolt with a flat or conical end.

Description

The utility model relates to the field of the gas industry and can be used in the maintenance and repair of ball valves to eliminate gas leakage in case of leaks in the fittings for supplying lubricants and sealing materials.

Ball valves are provided with fittings for supplying lubricants and sealing materials, which contain a check valve in the design. The fittings are of a flanged design for quick connection of the packing device. If the check valve of the fitting is leaking, it is necessary to carry out an operation to eliminate gas leakage into the atmosphere, which in practice can be performed by installing a plug [1, 2].

Fittings of lubricants and sealing materials [3] are known in the design of which there is no external thread for attaching a plug (cover), for example, ball valves manufactured by RMA. The design of fittings from different manufacturers uses threads of various sizes. During operation, cases of damage to the threads of the fittings for supplying lubricants and sealing materials are also known, after which the installation of a threaded plug becomes impossible. In these cases, in order to eliminate gas leakage due to leakage of the fitting check valve, it will be necessary to carry out repair work with natural gas venting to the atmosphere.

Known external plug for the safe release of gas into the atmosphere [4], designed to relieve excess pressure that accumulates under the plug.

The main disadvantages of this device are:

- the need for a thread on the body of the plug for its connection;

- the presence of excess pressure of the working medium acting on the body of the plug, since tightness is achieved by sealing the locking element of the plug with the body of the plug.

Known plugs [5, 6], designed to protect the fittings for supplying lubricants and sealing materials from atmospheric precipitation and to eliminate gas leakage into the atmosphere with a non-hermetic check valve of the fitting and accepted by us as the closest analogue.

The main disadvantages of these plugs are:

- limited scope due to the need for a standard threaded connection for its connection;

- the risk of possible damage to the threaded connection, which does not allow the installation of the plug;

- the presence of a non-removable cone (shut-off element) of the cover, which does not allow prompt replacement (repair) if a leak in the connection of the cone with the fitting is detected.

The objective of the utility model is to provide the possibility of eliminating gas leaks of the fittings for supplying lubricants and sealing materials with a flange due to leakage of the check valve.

The technical result of the utility model is the development of a plug design for its attachment to fittings for supplying lubricants and sealing materials with a flange without using a threaded connection.

The problem is solved, and the technical result is achieved by installing a plug, consisting of a body and a locking element, in which the body and the locking element are connected by a threaded connection, while a groove is made in the body, and the locking element is made in the form of a bolt with a flat end.

The claimed device is explained using:

fig. 1 - general view of the plug.

The device consists of a plug body (1) and a plug locking element (2), which is connected to the plug body (1) by a threaded connection (3). A groove (4) is made in the plug body (1) for fixing the flange (5). The locking element of the plug (2) is made in the form of a bolt (screw) with a hexagonal head or a wrench recess with a flat end (6). The sealing of the connection of the flat end (6) of the closing element of the plug (2) and the end surface (7) of the body of the fitting for supplying lubricants and sealing materials (8) is carried out by the sealing element (9), which is fixed and tightened by the threaded connection (3).

The stub works as follows.

In case of loss of tightness of the shut-off element (10) of the check valve of the fitting for supplying lubricants and sealing materials (8), the gas enters the inlet channel (11) of the fitting for supplying lubricants and sealing materials (8) and further into the atmosphere. The leakage is eliminated as follows: the plug body (1) is connected through the groove (4) to the flange (5) of the fitting for supplying lubricants and sealing materials (8). Rotating the closing element of the plug (2) ensures sealing of the connection, the flat end (6) of the closing element of the plug (2) and the end surface (7) of the body of the fitting for supplying lubricants and sealing materials (8) due to the sealing of the sealing element (9).

The essential distinguishing features of the claimed plug are:

- the possibility of installing a plug on fittings having a design with a flange that provides quick connection of the stuffing device;

- the ability to eliminate gas leaks on fittings having a flange design that provides quick connection of the stuffing device.

The claimed essential distinguishing features are unknown to us from patent and scientific and technical information and, in accordance with this, are "New".

For the claimed device, working drawings, strength calculations were made and a prototype was made, which was successfully tested during the maintenance of ball valves at the facilities of Gazprom Transgaz Ukhta LLC. In this regard, the claimed device meets the criterion of "industrial applicability".

The claimed device makes it possible to eliminate gas leaks due to leaks in the check valve of the fitting for supplying lubricants and sealing materials.

List of sources:

1. STO Gazprom 2-4.1-212-2008 Regulatory documents for the design, construction and operation of OAO Gazprom facilities. General technical requirements for pipeline fittings supplied to OAO Gazprom's facilities (clause 7.3.1.20).

2. Manual for installation, commissioning, operation and maintenance MA 39183M-1400 RE of ball valves manufactured by JSC NPO Tyazhpromarmatura.

3. RU 2470210 C2, publ. 12/20/2012 Description of the invention to the patent "Valve".

4. RU 188642 U1, publ. 04/18/2019 Description of the invention to the patent "External plug for safe venting of gas into the atmosphere".

5. RU 2116555 C1, publ. 07/27/1998 Description of the invention to the patent "Packing valve".

6. RU 70702 U1, publ. 10.02.2008 Description of the utility model for the patent "Packing valve".

Claims (1)

A plug consisting of a body and a shut-off element, characterized in that the connection of the body and the shut-off element is made by a threaded connection, while in the body, on the connection side with the fitting flange, a through groove is made with the possibility of fixing the plug body to the shoulder of the fitting flange, and the shut-off element made in the form of a bolt with a flat end.

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