CN220851805U

CN220851805U - Long-distance natural gas pipeline gas leakage detector

Info

Publication number: CN220851805U
Application number: CN202322803115.1U
Authority: CN
Inventors: 刘建冲; 李宝龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-10-19
Filing date: 2023-10-19
Publication date: 2024-04-26
Anticipated expiration: 2033-10-19

Abstract

The utility model provides a long-distance natural gas pipeline leakage detector, which relates to the technical field of natural gas pipeline tightness monitoring equipment, and comprises a gas pipe, a connecting ring pipe, a low-pressure tank and a gas tank, wherein the connecting ring pipe is arranged at the joint of the two gas pipes, the low-pressure tank and the gas tank are connected with a plurality of connecting ring pipes through pipeline components, the pipeline components comprise an L-shaped pipe with one end fixedly connected with the connecting ring pipe in a penetrating way and a T-shaped pipe with one end movably connected with the L-shaped pipe, the arranged threaded ring ensures that the L-shaped pipe and the T-shaped pipe are detachable, and a total electromagnetic valve arranged on the L-shaped pipe can control the L-shaped pipe connected with the gas tank to be closed in the process of detecting leakage, so that leaked natural gas can completely enter the L-shaped pipe connected with the low-pressure tank through the inside of the connecting ring pipe when the gas pipe leaks.

Description

Long-distance natural gas pipeline gas leakage detector

Technical Field

The utility model relates to the technical field of natural gas pipeline tightness monitoring equipment, in particular to a long-distance natural gas pipeline leakage detector.

Background

The natural gas pipeline is a pipeline specially used for conveying natural gas, and for long-distance conveying of natural gas, a plurality of pipelines are usually required to be spliced to form a long pipeline, and in the splicing process of the pipelines, as the spliced part is not integrally formed, air leakage is easily caused by poor installation angle, and therefore, the tightness detection is required to be carried out on the spliced part of the pipelines.

For example, in a long-distance natural gas pipeline leakage detector (publication number: CN 218379011U) in the prior art, two arc plates are sleeved at the joint of a first pipeline and a second pipeline, then a first cylindrical rod is pressed downwards, the first piston is driven to move when the first cylindrical rod moves downwards, so that the first piston extrudes gas in the first gas guide pipe to the arc plate, at the moment, the gas in the arc plate enters the second gas guide pipe and drives the second piston to move upwards, the second piston drives the second cylindrical rod and the second disc to move upwards, then the first disc is rotated, the rotating disc is fixedly connected with the first gas guide pipe in a threaded manner, when the sealing performance of the joint of the first pipeline and the second pipeline is poor, the gas in the arc plate enters the interior of the first pipeline and the second pipeline from the joint of the first pipeline, at the moment, the second piston moves downwards under the rebound force of an elastic piece, so that the second disc approaches the second gas guide pipe, and the joint can be judged to be leaked;

However, in the prior art, the second sealing gasket is used as the air tightness between the arc-shaped plate and the pipeline, the first piston and the second piston are used as the first air duct and the second air duct, the second sealing gasket and the first piston and the second piston are usually made of rubber, silica gel or other flexible materials, when the sealing gasket is exposed to the air for a long time, the sealing gasket is poor in elasticity and worn on the surface, air is easily leaked, and the air leakage also causes the air pressure change in the arc-shaped plate, so that misjudgment is easily caused, and the inventor provides a long-distance natural gas pipeline air leakage detector with better air tightness detection effect.

Disclosure of utility model

The utility model aims to solve the problems in the prior art and provides a long-distance natural gas pipeline leakage detector.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a long defeated natural gas line leak detector, includes the gas-supply pipe and sets up the coupling ring canal of two gas-supply pipe butt joints departments, still includes low pressure jar and gas pitcher, all link to each other through the pipeline subassembly between low pressure jar and the gas pitcher and the coupling ring canal, the pipeline subassembly includes one end and connects L type pipe of ring canal through fixed connection, with L type pipe one end swing joint's T type pipe, and the relative port cover of two adjacent T type pipes is equipped with the connecting pipe, the jar mouth of low pressure jar and gas pitcher links to each other with adjacent T type pipe one end wherein, be provided with check valve and gas pressure sensor in the L type intraductal on the low pressure jar, the check valve is opened to the direction of keeping away from coupling ring canal.

Further: a threaded ring is connected between one of the ports of the L-shaped pipe and the T-shaped pipe in a threaded manner, and a main electromagnetic valve is arranged in the L-shaped pipe.

Further: the utility model discloses a three-way pipe, including the connecting ring pipe, the L type pipe end fixedly connected with three-way pipe on the gas pitcher, the three-way pipe is located the connecting ring pipe, and one of them port is fixed with L type pipe end, all be provided with branch solenoid valve in the other two ports of three-way pipe to one of them communicates with each other with the connecting ring pipe inside, another is connected with the hose.

Further: the inner wall of the connecting ring pipe is fixedly connected with a sealing air bag for sealing the joint of the two air pipes, and an air port of the sealing air bag is connected with one end of the hose.

Further: the total electromagnetic valve of the L-shaped pipe on the low-pressure tank is arranged between the one-way valve and the gas pressure sensor.

Further: and the connecting ring pipe is connected with the outer wall of the gas pipe in a welding way.

Further: one end of the T-shaped pipe far away from the low-pressure tank and the gas tank is in a closed arrangement.

Compared with the prior art, the utility model has the advantages and positive effects that,

1. In the utility model, the low-pressure tank keeps fixed air pressure in the L-shaped pipe connected with the low-pressure tank, the air tank is deflated to keep the same air pressure in the L-shaped pipe connected with the low-pressure tank through the connecting pipe, the T-shaped pipe and the L-shaped pipe connected with the low-pressure tank, so that once the gas pipe is leaked at the butt joint position, natural gas enters the connecting pipe, the one-way valve is pressed to be rotated and opened, air flow enters the L-shaped pipe of the low-pressure tank, the generated air pressure change is detected by the air pressure sensor, and because the connecting pipe is fixed on the gas pipe, the leakage point can only appear at the butt joint position of the gas pipe, and misjudgment can not be caused.

2. According to the utility model, the three-way pipe and the branch electromagnetic valve are arranged, so that personnel can conveniently control the trend of gas in the gas tank, namely, the branch electromagnetic valve is used for controlling the opening and closing of the corresponding port, the gas in the gas tank can be selected to enter the connecting annular pipe or the sealing air bag, when the gas pipe leaks gas, the sealing air bag is inflated conveniently by inflating the sealing air bag, the sealing air bag is inflated and is tightly attached to the butt joint of the gas pipe, the temporary blocking of the gas leakage point of the gas pipe is realized, and the sufficient maintenance time is reserved for maintenance personnel.

Drawings

Fig. 1 is a schematic perspective view of a long-distance natural gas pipeline leakage detector according to the present utility model;

FIG. 2 is a schematic cross-sectional view of the gas leakage detector of the long-distance natural gas pipeline of FIG. 1 according to the present utility model;

FIG. 3 is a schematic view showing the bottom view of an L-shaped tube of a leakage detector for a long-distance natural gas pipeline;

Fig. 4 is an enlarged view at a in fig. 2.

Legend description: 1. a gas pipe; 2. connecting a ring pipe; 3. a connecting pipe; 4. a T-shaped tube; 5. a low pressure tank; 6. a gas tank; 7. an L-shaped tube; 8. a main electromagnetic valve; 9. a three-way pipe; 10. a solenoid valve; 11. a hose; 12. a threaded ring; 13. a gas pressure sensor; 14. a one-way valve; 15. sealing the air bag.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

As shown in fig. 1-4, the long-distance natural gas pipeline leakage detector comprises a gas pipe 1, a connecting ring pipe 2 arranged at the joint of the two gas pipes 1, a low-pressure tank 5 and a gas tank 6, wherein the low-pressure tank 5 and the gas tank 6 are connected with a plurality of connecting ring pipes 2 through pipeline components, each pipeline component comprises an L-shaped pipe 7, one end of which is fixedly connected with the connecting ring pipe 2 in a penetrating way, a T-shaped pipe 4, one end of which is movably connected with the L-shaped pipe 7, connecting pipes 3 are sleeved at opposite ports of the two adjacent T-shaped pipes 4, tank openings of the low-pressure tank 5 and the gas tank 6 are connected with one end of the adjacent T-shaped pipe 4, a one-way valve 14 and a gas pressure sensor 13 are arranged in the L-shaped pipe 7 on the low-pressure tank 5, and the one-way valve 14 is opened in a direction away from the connecting ring pipe 2;

In the scheme, the method comprises the following steps: the low pressure tank 5 can keep fixed air pressure in the connecting pipe 3, the T-shaped pipe 4 and the L-shaped pipe 7 connected with the low pressure tank 5, then the air tank 6 can keep the same air pressure in the L-shaped pipe 7 connected with the low pressure tank 5 through the connecting pipe 3, the T-shaped pipe 4 and the L-shaped pipe 7 connected with the low pressure tank 5, under the action of the same air pressure, the check valve 14 can not be opened in a rotating way, and the air pressure in the connecting pipe 2 is lower than the air pressure in the air pipe 1, so that once the air leakage occurs at the butt joint of the air pipe 1, natural gas can enter the connecting pipe 2 to cause air pressure unbalance at two sides of the check valve 14, the air pressure in the connecting pipe 2 can press the check valve 14 to be opened in a rotating way, so that the air flow enters the L-shaped pipe 7 of the low pressure tank 5, and the generated air pressure change is detected by the air pressure sensor 13, namely personnel can remotely monitor and judge the air leakage of the air pipe 1, and because the connecting pipe 2 is fixed on the air pipe 1, the air leakage point can only occur at the butt joint of the air pipe 1, and erroneous judgment is avoided.

As shown in fig. 1 and 4: a threaded ring 12 is connected between the L-shaped pipe 7 and one of the ports of the T-shaped pipe 4 in a threaded manner, and a main electromagnetic valve 8 is arranged in the L-shaped pipe 7.

In addition: the total solenoid valve 8 of the L-shaped pipe 7 on the low pressure tank 5 is arranged between the non-return valve 14 and the gas pressure sensor 13.

In the scheme, the method comprises the following steps: the screw thread ring 12 that sets up guarantees to dismantle between L type pipe 7 and the T type pipe 4 to the total solenoid valve 8 that sets up on L type pipe 7 can be in the detection gas leakage in-process, and the L type pipe 7 that control links to each other with gas pitcher 6 is closed, when guaranteeing gas-supply pipe 1 gas leakage, and the natural gas of leakage is through connecting in the inside whole L type pipe 7 that gets into with low pressure tank 5 that link to each other of ring pipe 2.

As shown in fig. 2, 3 and 4: the port of the L-shaped pipe 7 on the gas tank 6 is fixedly connected with a three-way pipe 9, the three-way pipe 9 is positioned in the connecting ring pipe 2, one port is fixed with the port of the L-shaped pipe 7, the other two ports of the three-way pipe 9 are internally provided with a solenoid valve 10, one port is communicated with the inside of the connecting ring pipe 2, and the other port is connected with a hose 11.

In addition: the inner wall of the connecting ring pipe 2 is fixedly connected with a sealing air bag 15 for sealing the joint of the two air pipes 1, and the air port of the sealing air bag 15 is connected with one end of the hose 11;

in the scheme, the method comprises the following steps:

the three-way pipe 9 and the branch electromagnetic valve 10 are arranged to facilitate personnel to control the trend of gas in the gas tank 6, namely, the branch electromagnetic valve 10 controls the corresponding port to open and close, so that the gas in the gas tank 6 can be selected to enter the connecting ring pipe 2 or the sealing air bag 15, when the gas pipe 1 leaks gas, the gas is conveniently inflated into the sealing air bag 15, the sealing air bag 15 is inflated and tightly attached to the butt joint of the gas pipe 1, the temporary blocking of the gas leakage point of the gas pipe 1 is realized, and the sufficient maintenance time is reserved for maintenance personnel.

As shown in fig. 1: the connecting ring pipe 2 is welded with the outer wall of the gas pipe 1;

in the scheme, the method comprises the following steps:

The sealing performance of the outer wall of the connecting ring pipe 2 and the outer wall of the gas pipe 1 can be guaranteed through welding connection, and the butt joint of the gas pipe 1 is further reinforced and fixed.

As shown in fig. 1: one end of the T-shaped pipe 4 far away from the low-pressure tank 5 and the gas tank 6 is arranged in a closed way;

in the scheme, the method comprises the following steps:

The closing of the ports may be performed by welding circular plates or by installing valves.

After the device is assembled, the low-pressure tank 5 can press the valve plate of the one-way valve 14 through the connecting pipe 3, the T-shaped pipe 4 and the L-shaped pipe 7 connected with the low-pressure tank 5, the valve plate of the one-way valve 14 is in a closed state, then the air tank 6 is kept at the same air pressure in the L-shaped pipe 7 connected with the low-pressure tank 5 through the connecting pipe 3, the T-shaped pipe 4 and the L-shaped pipe 7 connected with the air tank, once the butt joint of the air pipe 1 leaks air, natural gas can enter the connecting pipe 2 to cause air pressure imbalance at two sides of the one-way valve 14, so that the air pressure in the connecting pipe 2 can press the one-way valve 14 to be opened in a rotating way, the generated air pressure change is detected by the air pressure sensor 13, namely, personnel can remotely monitor and judge the air pipe 1, and at the moment of air leakage, the opening of a port connected with the hose 11 is controlled by the solenoid valve 10 on the three-way valve 9, the sealing air bag 15 is inflated and closely attached to the butt joint of the air bag 1 when the air pipe 1, so that the air bag 1 is inflated, the time is enough for overhauling the air pipe 1 to temporarily leak the air pipe, and the air leakage point is kept for the personnel.

The wiring diagrams of the main solenoid valve 8, the sub solenoid valve 10 and the gas pressure sensor 13 in the utility model belong to common knowledge in the field, the working principle is the known technology, and the model of the wiring diagrams is selected to be suitable according to the actual use, so the control mode and wiring arrangement of the main solenoid valve 8, the sub solenoid valve 10 and the gas pressure sensor 13 are not explained in detail.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. The utility model provides a long defeated natural gas pipeline gas leakage detector, includes gas-supply pipe (1) and sets up connect ring canal (2) of two gas-supply pipe (1) butt joints department, its characterized in that: still include low pressure tank (5) and gas pitcher (6), all link to each other through the pipeline subassembly between low pressure tank (5) and gas pitcher (6) and a plurality of ring canal (2) of connecting, pipeline subassembly include one end and connect L type pipe (7) of ring canal (2) through fixed connection, with L type pipe (7) one end swing joint's T type pipe (4), the relative port cover of two adjacent T type pipes (4) is equipped with connecting pipe (3), the jar mouth of low pressure tank (5) and gas pitcher (6) links to each other with adjacent T type pipe (4) one end wherein, be provided with check valve (14) and gas pressure sensor (13) in L type pipe (7) on low pressure tank (5), check valve (14) are opened to the direction of keeping away from connecting ring canal (2).

2. The long-term natural gas pipeline leak detector of claim 1, wherein: a threaded ring (12) is connected between the L-shaped pipe (7) and one of the ports of the T-shaped pipe (4) in a threaded mode, and a main electromagnetic valve (8) is arranged in the L-shaped pipe (7).

3. The long-term natural gas pipeline leak detector of claim 1, wherein: the utility model discloses a three-way pipe, including gas pitcher (6) and connecting ring pipe (2), L type pipe (7) port fixedly connected with three-way pipe (9) on gas pitcher (6), three-way pipe (9) are located connecting ring pipe (2), and one of them port is fixed with L type pipe (7) port, all be provided with branch solenoid valve (10) in other two ports of three-way pipe (9), and one of them communicates with each other with connecting ring pipe (2) inside, another is connected with hose (11).

4. A long-life natural gas pipeline leakage detector according to claim 3, wherein: the inner wall of the connecting ring pipe (2) is fixedly connected with a sealing air bag (15) for sealing the joint of the two air pipes (1), and an air port of the sealing air bag (15) is connected with one end of the hose (11).

5. The long-life natural gas pipeline leakage detector of claim 2, wherein: the total electromagnetic valve (8) of the L-shaped pipe (7) on the low-pressure tank (5) is arranged between the one-way valve (14) and the gas pressure sensor (13).

6. The long-term natural gas pipeline leak detector of claim 1, wherein: the connecting ring pipe (2) is welded with the outer wall of the gas pipe (1).

7. The long-term natural gas pipeline leak detector of claim 1, wherein: one end of the T-shaped pipe (4) far away from the low-pressure tank (5) and the gas tank (6) is in a closed arrangement.