Natural gas pipeline leakage detection device

Abstract

The utility model provides a natural gas pipeline leakage detection device which comprises natural gas pipes and a connector arranged at the joint of adjacent natural gas pipes, a detection mechanism is arranged at the joint of the natural gas pipes with the connector, the detection mechanism comprises an upper protective cover and a lower protective cover, and the upper protective cover and the lower protective cover are connected through threads. Sealing rings are mounted at the upper end of the upper protecting cover and the lower end of the lower protecting cover; an observation opening is formed in the upper end of the upper protecting cover, a lifting area baffle of an L-shaped structure is arranged in the upper protecting cover, a space used for installing a lifting identification plate is formed between the lifting area baffle and the inner wall of the upper protecting cover, and a plurality of through holes are formed in the lower surface of the lifting area baffle. According to the utility model, the detection mechanism is arranged at the joint of the adjacent natural gas pipelines, so that when leakage occurs at the joint, the leakage can be directly known by visual inspection, and a portable detector does not need to be held by hand for detection, so that the labor intensity of workers can be reduced, and the working efficiency of routing inspection can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas pipeline detection, and particularly relates to a natural gas pipeline leakage detection device. Background Technique

[0002] Natural gas is a gaseous fossil fuel mainly composed of methane. It mainly exists in oil fields and natural gas fields, and there is also a small amount in coal seams. Natural gas is also buried in closed geological structures underground like crude oil. Some are stored in the same layer as crude oil, and some exist alone. For natural gas stored in the same layer as crude oil, it will be extracted together with the crude oil. A natural gas pipeline is a pipeline that transports natural gas, including associated gas produced in oil fields, from the production site or treatment plant to the urban gas distribution center or industrial enterprise users, also known as a gas transmission pipeline.

[0003] The natural gas pipeline is composed of multiple sub-pipelines, and adjacent sub-pipelines are connected by flange assemblies. Existing natural gas pipelines require operators to conduct regular inspections with handheld portable detectors to determine whether there is a gas leak. Due to the large number of connection points in the natural gas pipeline, using a handheld portable detector for detection in sequence has the problems of high labor intensity and low work efficiency. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a natural gas pipeline leakage detection device. By installing a detection mechanism at the connection position of adjacent natural gas pipelines, when a leak occurs at the connection, it can be directly visually observed, and there is no need to use a handheld portable detector for detection anymore, thereby reducing the labor intensity of the staff and improving the work efficiency of the inspection tour. The technical solutions adopted are as follows:

[0005] A natural gas pipeline leakage detection device includes a natural gas pipe and a connector arranged at the connection of adjacent natural gas pipes. A detection mechanism is arranged at the connection of the natural gas pipe where the connector is located. The detection mechanism includes an upper cover and a lower cover. The upper cover and the lower cover are connected by threads, and sealing rings are installed at the upper end of the upper cover and the lower end of the lower cover;

[0006] An observation port is provided at the upper end of the upper cover. An L-shaped lifting area baffle is arranged inside the upper cover. A space for installing a lifting identification plate is formed between the lifting area baffle and the inner wall of the upper cover. A plurality of through holes are opened on the lower surface of the lifting area baffle.

[0007] Furthermore, the sealing ring has a conical structure with a thicker lower part and a thinner upper part, and a thread groove is opened on the outer surface of the upper end of the sealing ring.

[0008] Further, fastening nuts threadedly connected to the sealing ring are provided at both the upper and lower ends of the detection mechanism. By turning the fastening nuts, the tightness of the sealing ring between the detection mechanism and the natural gas pipe can be adjusted. When the sealing ring is not filled tightly between the detection mechanism and the natural gas pipe, the upper cover and the lower cover can rotate to realize the connection between the upper cover and the lower cover. When the sealing ring is filled tightly between the detection mechanism and the natural gas pipe, the detection mechanism can be kept sealed.

[0009] Further, the upper end of the upper cover and the lower end of the lower cover are both provided with inclined structures adapted to the sealing ring, which is convenient for fitting with the sealing ring.

[0010] Further, the lifting identification plate is made of a lightweight EPS board. The inner and outer sides of the lifting identification plate are respectively in contact with the inner wall of the lifting area baffle and the inner wall of the upper cover. Under the action of the leaked natural gas, the lifting identification plate will be pushed up.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] By arranging the detection mechanism at the connection of adjacent natural gas pipes, the utility model does not require workers to regularly use detection instruments for detection, reducing the labor intensity. By observing the observation port in the detection mechanism with the naked eye, when it is observed that the lifting identification plate rises to the position of the observation port, there is a leak at the connection of the adjacent natural gas pipes. Thus, it can be quickly known whether there is a problem at the connection of adjacent natural gas pipes, so as to repair in time and improve the work efficiency.

[0013] The upper cover and the lower cover in the detection mechanism of the utility model are tightly connected by threads. Sealing rings are also provided at both the upper and lower ends of the detection mechanism, which can ensure that the inside of the detection mechanism is in a sealed state. While the detection mechanism can detect the leakage at the connection of adjacent natural gas pipes, it can also prevent natural gas from leaking out of the detection mechanism, thereby reducing the safety hazard of gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of the utility model;

[0015] Figure 2 is the exploded structural schematic diagram of the detection mechanism of the utility model;

[0016] Figure 3 is the internal structural schematic diagram of the detection mechanism of the utility model;

[0017] Figure 4 is the utility model Figure 3 is the enlarged schematic diagram of the structure at A in the figure.

[0018] In the figure:

[0019] 1 - Natural gas pipe, 2 - Connector, 3 - Upper cover, 31 - Observation port, 32 - Lifting area baffle, 33 - Through hole, 34 - Lifting identification plate, 4 - Lower cover, 5 - Sealing ring, 6 - Fastening nut. Detailed implementation manner

[0020] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] As shown in the attached Figures 1-4 figure.

[0022] A natural gas pipeline leakage detection device includes a natural gas pipe 1 and a connector 2 provided at the connection of adjacent natural gas pipes 1. A detection mechanism is provided at the connection of the natural gas pipe 1 where the connector 2 is provided. The detection mechanism includes an upper cover 3 and a lower cover 4. The upper cover 3 and the lower cover 4 are threadedly connected, and sealing rings 5 are installed at the upper end of the upper cover 3 and the lower end of the lower cover 4. Thread grooves are provided on the outer surface of the upper end of the sealing ring 5, and fastening nuts 6 threadedly connected to the sealing ring 5 are provided at both the upper and lower ends of the detection mechanism.

[0023] The above-mentioned sealing ring 5 has a tapered structure that is thicker at the bottom and thinner at the top, and is embedded at the connection of the detection mechanism and the natural gas pipe 1. The upper end of the upper cover 3 and the lower end of the lower cover 4 are both provided with inclined structures adapted to the sealing ring 5; after the fastening nut 6 is screwed, the sealing tightness at the connection of the detection mechanism and the natural gas pipe 1 can be adjusted.

[0024] Through the above structural settings, the interior of the detection mechanism can be kept in a sealed state.

[0025] A transparent observation port is provided at the upper end of the upper cover 3. An L-shaped lifting area baffle 32 is provided inside the upper cover 3. A space for installing a lifting identification plate 34 is formed between the lifting area baffle 32 and the inner wall of the upper cover 3. A plurality of through holes 33 are provided on the lower surface of the lifting area baffle 32. The lifting identification plate 34 is made of EPS board, and the EPS board can be painted red.

[0026] The usage process is as follows. Before connecting adjacent natural gas pipes 1, first put the upper cover 3, the lower cover 4, and the sealing rings 5 and fastening nuts 6 at both ends into the adjacent natural gas pipes 1 in sequence, and then use the connector 2 to connect the adjacent natural gas pipes 1.

[0027] After the connection of adjacent natural gas pipes 1 is completed, the upper cover 3 and the lower cover 4 are combined by threaded connection, and the sealing ring 5 is pulled outwards by screwing the fastening nut 6, so that the sealing ring 5 is tightly filled between the natural gas pipe 1 and the detection mechanism, and the inside of the detection mechanism is in a sealed state.

[0028] The detection method is as follows: when natural gas leaks at the connection of adjacent natural gas pipes 1, the natural gas will fill the inside of the detection mechanism. Under the influence of air pressure, the lifting identification plate 34 will be lifted. When the lifting identification plate 34 rises to the top inside the upper cover 3, it can be seen from the position of the observation port 31, enabling the staff to discover the leak at this place faster and repair it in time.

[0029] Any technical solution using the technical solution of the present invention, or a technical solution designed by those skilled in the art inspired by the technical solution of the present invention and achieving the above technical effects, shall fall within the protection scope of the present invention.

Claims

1. A natural gas pipeline leakage detection device, comprising a natural gas pipe (1) and a connector (2) arranged at the connection between adjacent natural gas pipes (1), characterized in that: A detection mechanism is provided at a connection point where a connector (2) is provided on a natural gas pipe (1), the detection mechanism comprising an upper protective cover (3) and a lower protective cover (4), the upper protective cover (3) and the lower protective cover (4) being connected via threads, and a sealing ring (5) is installed at the upper end of the upper protective cover (3) and the lower end of the lower protective cover (4); An observation port is provided at the upper end of the upper protective cover (3), an L-shaped lifting area baffle (32) is provided inside the upper protective cover (3), a space for installing a lifting identification plate (34) is formed between the lifting area baffle (32) and the inner wall of the upper protective cover (3), and a plurality of through holes (33) are provided on the lower surface of the lifting area baffle (32).

2. A natural gas pipeline leakage detection device as claimed in claim 1, characterized in that: The sealing ring (5) has a conical structure that is thick at the bottom and thin at the top, and a thread groove is provided on the outer surface of the upper end of the sealing ring (5).

3. A natural gas pipeline leakage detection device as claimed in claim 2, characterized in that: The upper and lower ends of the detection mechanism are each provided with a fastening nut (6) threadedly connected to the sealing ring (5).

4. A natural gas pipeline leakage detection device as claimed in claim 2, characterized in that: The upper end of the upper protective cover (3) and the lower end of the lower protective cover (4) are both arranged as inclined structures that match the sealing ring (5).

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