RU198876U1 - Exhaust plug for monitoring the state of the main gas pipeline - Google Patents

Abstract

The utility model relates to pipeline transport and can be used to control and timely eliminate the hazardous state of the main gas pipeline. located at the level of the gas pipeline for the passage of including gas from outside to inside. At the top, the cup cover is equipped with a plug with a plug, made with the possibility of passing gas from the casing when the gas analyzer is connected after removing the plug. The protective casing in the lower part is equipped with a pointed nozzle and a spiral for entering the ground when rotating at a distance, which allows monitoring the gas release from the gas pipeline and evaluating its temperature. The cover is removable from above, and the part of the casing located above the ground is covered with a heat-insulating material after installation from the outside. The technical task of the proposed utility model is to create an exhaust plug simple and reliable by installing near a gas pipeline without preliminary preparation and expanding functionality due to the possibility of temperature control. 1 n. and 2 h. p. f-ly, 4 ill.

Description

The utility model relates to pipeline transport and can be used to control and timely eliminate the dangerous state of the main gas pipeline (MG).

A known system for monitoring gas leakage when the main gas pipeline crosses the road (patent for PM RU No. 84503, IPC F17D 5/02, F16L 57/00, publ. 10.07.2009 in Bull. No. 19), containing a protective case with an exhaust plug and a sensor gas leakage connected by the output to the electronic unit, which includes a series-connected multiplexer, analog-to-digital converter, central processor and interface converter, while the central processor output is connected to the controlled input of the multiplexer, and contains at least two additional gas leakage sensors, connected to the multiplexer input parallel to the first leakage sensor, and a branch pipe is connected to the exhaust plug, on which all leakage sensors are installed, and the branch pipe additionally contains a fitting for periodic system calibration in field conditions.

The disadvantages of the used candle are the complexity of installation, manufacture and use associated with a complex design and the presence of a large number of measuring equipment, which in field conditions very often also leads to breakdowns, and also often under the influence of external factors.

There is also known a system for monitoring and eliminating the dangerous state of the passage of the main gas pipeline across the road (patent for PM RU No. 91750, IPC F17D 5/02, F16L 58/00, published on 27.02.2010 in Bull. No. 6), containing a protective case with an exhaust a candle and an information converter with a gas concentration sensor, and additionally contains an executive body, while the gas concentration sensor of the information converter is located in the exhaust plug cavity, the input of the executive body is connected to the output of the information converter, and the output is connected to a device for cutting off the gas supply to the main gas pipeline.

The disadvantages of the used candle are the complexity of manufacture and use associated with a complex design and the presence of a large number of measuring equipment, which in field conditions very often also leads to breakdowns, and also often breaks down under the influence of external factors.

There is also known a system for monitoring and eliminating the dangerous state of the main gas pipeline (patent RU No. 2422712, IPC F16L 7/00, publ. 06/27/2011 in Bull. No. 18), containing a protective casing and a pneumatically connected exhaust plug, as well as a filter medium covered from above with a gas-impermeable material, and the filtering medium, covered from above with a gas-impermeable material, is located along the entire monitored section of the main gas pipeline, performing the function of a protective casing, in the exhaust plug of which sensors of parameters of the technical state of the main gas pipeline are installed.

The disadvantages of the used candle are the complexity of manufacture and use, associated with a complex design and the presence of measuring equipment, which in field conditions very often also leads to breakdowns, and also often breaks under the influence of external factors.

The closest in technical essence is an exhaust plug for monitoring the dangerous state of the passage of the main gas pipeline across the road (patent for PM RU No. 192142, IPC F17D 5/02, G01N 1/22, publ. 09/04/2019 Bull. No. 25), containing a protective casing , moreover, the protective casing is made in the form of an inverted glass with slots spaced evenly along the perimeter and height and located below the gas-tight material for passing gas from outside to inside, while the casing is equipped with a nipple with a plug on top, made with the possibility of passing gas from the casing when the gas analyzer is connected after removing the plug.

The disadvantage of this exhaust plug, like other analogues, is the complexity of the installation due to the need for preliminary preparation of the installation site and the narrow scope of application due to the lack of the ability to control the temperature.

The technical task of the proposed utility model is to create a simple and reliable exhaust plug by installing it near a gas pipeline without preliminary preparation and expanding functionality due to the possibility of temperature control.

The technical problem is solved by an exhaust plug for monitoring the state of the main gas pipeline, containing a protective casing in the form of an inverted glass with a sealed cover on top and slots spaced evenly around the perimeter and height and located at the level of the gas pipeline for the passage of gas from outside to inside, with a cover on top the glass is equipped with a plug nipple made with the possibility of passing gas from the casing when the gas analyzer is connected after removing the plug.

The novelty is that the protective casing in the lower part is equipped with a pointed nozzle and a spiral for entering the soil when rotating at a distance that allows monitoring the gas release from the gas pipeline and assessing its temperature, while the cover from above is removable, and the part of the casing located above the ground after the unit is covered with heat-insulating material outside.

It is also new that the spiral of the protective casing is made in the form of a screw sleeve.

It is also new that the spiral of the protective casing is made in the form of an external spiral, rigidly connected to the cylindrical glass.

FIG. 1 shows a diagram of the installation of an exhaust plug in a longitudinal section.

FIG. 2 shows view A of Fig. 1

FIG. 3 shows a perspective view of an exhaust plug (without insulation), in which the spiral of the protective casing is made in the form of a screw cup.

FIG. 4 is a perspective view of an exhaust plug (without insulation), in which the spiral of the protective casing is made in the form of an external spiral, rigidly connected to a cylindrical glass.

The exhaust plug for monitoring the state of the main gas pipeline 1 (Fig. 1) contains a protective casing 2 in the form of an inverted glass 3 with a sealed cover 4 on top and slots 5, placed evenly around the perimeter and height and located at the level of the gas pipeline 1 for the passage of gas including outside to inside. The cover 4 of the glass 3 is equipped with a nipple 6 (Fig. 2) with a plug 7, made with the possibility of passing gas from the casing 2 (Fig. 1) when a gas analyzer (not shown) is connected after removing the plug 7. The glass 3 of the protective casing 2 is provided in the lower part a pointed nozzle 8 and a spiral 9 for entering the soil 10 while rotating at a distance H, which allows you to monitor the release of gas from the gas pipeline 1 and estimate its temperature. Cover 4 is removable from above. The part of the casing 2 located above the ground 10, after installation from the outside, is covered with a heat-insulating material 11.

The spiral 9 of the protective casing 2 can be made in the form of a screw 12 (Fig. 3) of a glass 3 or an external spiral 13 (Fig. 4) rigidly connected to a cylindrical glass 3. The screw 12 (Fig. 3) easily and quickly rolls onto the cylindrical surface of the glass 3 after making the slots 5 (Fig. 1) in the presence of special equipment (for example, JSC "Protector", Aznakaevo, Republic of Tatarstan - RT). In the absence of such equipment, it is easier to fix the spiral 13 (Fig. 3) (by welding, glue, etc.) outside the cylindrical glass 3.

Removable cover 4 (Fig. 1) can be made:

folding, rotating from one edge around the axis 14, and on the other is fixed by a piano loop or a lamb (not shown);

on a quick release thread (not shown);

fixed with a flange connection or the like.

The authors do not pretend to connect the lid 4 with the glass 3.

The nipple 6 (Fig. 2) may include a saddle 15 with a spring 16 pressed against it, a locking element 17 with a pusher 18 made with the possibility of interacting with a pipe (not shown) of the gas analyzer screwed onto the nipple 8 along the thread 19 for pressing the locking element 17 away from saddle 15. Designs of nipples 6 are known from many open sources, therefore, the authors do not pretend to a specific design of the nipple 6.

The heat-insulating material 11 (Fig. 1) can be made in the form of a tube, put on top of the casing 2, basalt wool mats (not shown), fixed outside the casing 2, an asserting foam (not shown) applied to the top of the glass 3, a lid 4, nipple 6 and plug 7, or the like. The authors do not claim this.

Structural elements, seals and process connections that do not affect the performance of the exhaust plug, in Fig. 1 - 4 are not shown or are shown conditionally

The exhaust candle works as follows.

At the legal distance H (Fig. 1) from the gas pipeline 1 into the soil 10 is screwed with the help of a pointed nozzle 8 and a spiral 9, made in the form of a screw 12 (Fig. 3) or an external spiral 13 (Fig. 4), a glass 3 (Fig. . 1, 3 and 4) to the required depth, so that the slots 5 are located on the same level with the gas pipeline 1. The candle 3 (Fig. 1) can be screwed into the ground 10, for example, using a special AZA technique (not shown), which is used for the installation of braces (links) during well workover. For gas pipelines located in the territory of the Republic of Tatarstan, the distance H is taken in the range of 0.2 - 0.35 m. The number of candles and the distance between them along the gas pipeline 1 is determined using technological calculations, the authors do not pretend to do this. Cover 4 is installed on top of the glass 3 (for example , using the axis 14 and the piano hinge) with the nipple 6 and the plug 7, forming the casing 2 of the candle. From above, the casing 2 is insulated with a heat-insulating material 11 to isolate from external temperature changes.

Periodically, workers who control the integrity of the gas pipeline 1 conduct a bypass to monitor its condition. For analysis (if necessary, first remove the tube of heat-insulating material 11) from the nipple 6 (Fig. 2) twist the plug 7 along the thread 19, screw the gas analyzer pipe onto this thread 19, which at the end of the thread 19 presses on the pusher 18 and pushes the shut-off body 17 away from saddle 15, overcoming the force of the spring 16. As a result, the branch pipe with the gas analyzer communicates with the inner space of the protective casing 3. In the event of a violation of the integrity of the gas pipeline 1 (Fig. 1), the released gas through the slots 5 will enter the inner space of the casing 2, which immediately fixes the gas analyzer, this immediately report to the emergency service to eliminate violations of the gas pipeline 1.

If the gas analyzer showed nothing, then its branch pipe is unscrewed about the nipple 6 (Fig. 2), the shut-off body 17 under the action of the spring 16 is pressed against the seat 15, sealing the inner space of the casing 2 (Fig. 1). The plug 7 (Fig. 2), which is screwed along the thread 19, additionally seals the inner space of the casing 2 (Fig. 1) and protects the inside of the nipple 6 from external factors. Then the cover 4 is removed from the glass 3 (for example, by turning around the axis 14) and the temperature of the soil 10 is measured at the level of the gas pipeline 1 location using a laser pyrometer or a thermal imaging camera of any known design (not shown). According to the soil temperature 10, they decide: where and in what quantities it is necessary to install condensate collectors of any known design (not shown) to exclude the formation of hydraulic jams in the gas pipeline 1.

After measuring the temperature, the lid 4 is hermetically installed on the glass 3 and, if necessary, the tube of the heat-insulating material 11 is installed in place. Next, the workers move (move) to the next exhaust candle to take the necessary measurements.

An example of a specific implementation.

During the use of these exhaust plugs in the territory of the Republic of Tatarstan, not a single breakdown was recorded, the simplicity and reliability of operation almost completely exclude gas emissions into the atmosphere, while measuring the ground temperature is easy and simple 10.

The proposed exhaust plug is simple and reliable in use and maintenance due to installation near a gas pipeline without preliminary preparation, and allows to achieve an expansion of functionality due to the ability to control temperature as well.

Claims (3)

1. An exhaust plug for monitoring the state of the main gas pipeline, containing a protective casing in the form of an inverted cup with a sealed cover on top and slots spaced evenly around the perimeter and height and located at the level of the gas pipeline for the passage of gas, including from outside to inside, with the cup cover on top equipped with a nipple with a plug, made with the possibility of passing gas from the casing when the gas analyzer is connected after removing the plug, characterized in that the protective casing in the lower part is equipped with a pointed nozzle and a spiral for entering the ground when rotating at a distance that allows you to monitor the gas release from the gas pipeline and to evaluate its temperature, while the top cover is made removable, and the part of the casing located above the ground is covered with heat-insulating material after installation from the outside. 2. Exhaust plug for monitoring the state of the main gas pipeline according to claim 1, characterized in that the spiral of the protective casing is made in the form of a screw cup. 3. Exhaust plug for monitoring the state of the main gas pipeline according to claim 1, characterized in that the spiral of the protective casing is made in the form of an outer spiral rigidly connected to the cylindrical glass.

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