Buried natural gas pipeline leakage detection device

Abstract

The invention relates to the technical field of natural gas, and discloses a buried natural gas pipeline leakage detection device which comprises a lower shell and an upper shell arranged above the lower shell, a channel is formed in the upper shell, a gas guide pipe is arranged above the channel, and a sensor is arranged in the gas guide pipe. The problem that the leakage condition of the natural gas pipeline is difficult to detect conveniently and quickly in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of natural gas technology, specifically a leak detection device for buried natural gas pipelines. Background Technology

[0002] High-consequence areas of oil and gas pipelines are important areas of concern in pipeline design and operation. It is important and necessary to conduct long-term identification and monitoring of risk factors in long-distance pipelines in high-consequence areas.

[0003] Natural gas pipeline leaks are a significant threat to the safe operation of pipelines. Once a leak occurs during production and operation, it not only pollutes the surrounding environment but also causes enormous economic and property losses, and may even lead to incalculable explosions. With increasing emphasis on the safety and environmental protection of natural gas pipelines, achieving real-time and accurate monitoring of leaks in in-service buried natural gas pipelines and quickly locating leaks through monitoring devices is of paramount importance.

[0004] However, existing technologies are not convenient and quick enough to detect natural gas pipeline leaks. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides a buried natural gas pipeline leak detection device, which solves the problem that existing technologies are unable to detect natural gas pipeline leaks conveniently and quickly.

[0006] The technical solution adopted by the present invention to solve the above problems is:

[0007] A buried natural gas pipeline leak detection device includes a lower shell and an upper shell located above the lower shell. The upper shell has a channel, and a gas inlet pipe is located above the channel. A sensor is located inside the gas inlet pipe.

[0008] As a preferred technical solution, a connector is included, and the channel and the air duct are connected by the connector.

[0009] As a preferred technical solution, a corrugated pipe is sleeved outside the connector.

[0010] As a preferred technical solution, both the upper and lower shells have horizontal plates connected to their outer surfaces.

[0011] As a preferred technical solution, it includes a sealing ring and a plastic ring, with the outer wall of the channel, the sealing ring, and the plastic ring connected in sequence.

[0012] As a preferred technical solution, a tray is included, and the sensor is housed within it.

[0013] As a preferred technical solution, a cap is provided at the top of the airway tube.

[0014] As a preferred technical solution, both ends of the upper and lower housings are provided with a sealing strip.

[0015] As a preferred technical solution, sealing rings are provided at both ends of the upper and lower housings.

[0016] As a preferred technical solution, the channel is a hollow structure that protrudes upward from the upper shell.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The present invention installs an upper shell, a lower shell, a connector, an air duct, a tray, and a cover. The upper shell and the lower shell are connected by a horizontal plate, a nut, and threaded fasteners. In this way, the tube is completely sealed by the upper shell, the lower shell, and the outer sealing ring under the wrapping of the sealing tape, thereby ensuring the airtightness between the shell and the tube.

[0019] (2) The present invention achieves the purpose of connection by setting a connector between the air inlet tube and the shell. The connector is sealed to the shell by pressing and to the air inlet tube by threaded connection.

[0020] (3) The present invention enhances the stability of the shell and reduces the deformation of the shell under gravity or third-party action by setting an internal support between the shell and the tube.

[0021] (4) The present invention can detect gas leaks more conveniently and quickly through the sensor at the top of the gas inlet tube, so that staff can react in a short time and then implement solutions, thereby improving overall work efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a buried natural gas pipeline leak detection device according to the present invention;

[0023] Figure 2 for Figure 1 One of the magnified views of a section;

[0024] Figure 3 for Figure 1 The second enlarged view of a section;

[0025] Figure 4 for Figure 1 The third enlarged view of a section;

[0026] Figure 5 for Figure 1 Side view;

[0027] Figure 6 for Figure 5 A magnified view of a portion of the image;

[0028] Figure 7 for Figure 1 Top view.

[0029] The markings and their corresponding names in the attached diagram are as follows: 1. Tube body, 2. Upper shell, 3. Lower shell, 4. Connector, 5. Air vent tube, 6. Cover, 7. Tray, 8. Seal, 9. Sensor, 10. Sealing ring, 11. Plastic ring, 12. Wrapped sealing tape, 13. Nut, 14. Bolt, 15. Sealing ring, 16. Horizontal plate, 17. Sealing gasket, 18. Weld, 19. Elastic support, 20. Bellows, 21. Channel 21. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] Example 1

[0032] like Figures 1 to 7 As shown, this invention discloses a leak detection device for buried natural gas pipelines in high-consequence areas, comprising an upper shell and a lower shell. The upper shell is positioned above the lower shell. Two horizontal plates are arranged on the left and right sides of both the upper and lower shells, and multiple tightening components are mounted on the horizontal plates. The upper shell is connected to a gas inlet pipe via a connector. A tray is located inside the gas inlet pipe, on which a leak sensor is placed. A cap is placed on top of the tray. This invention, through its upper and lower shells, connector, gas inlet pipe, sensor, and cap, is used in the welded areas of high-consequence pipeline sections after pipeline construction. During use, the upper and lower shells are fitted onto the pipeline body, and the tightening components on the left and right sides are used to quickly fix the pipeline body. Subsequent assembly of the connector and gas inlet pipe enables leak monitoring in the welded areas of high-consequence zones, thereby effectively improving the reliability and safety of pipeline operation in high-consequence zones.

[0033] The housing is equipped with sealing rings and sealing tape at both ends of the tube, and the upper housing has an opening in the middle, providing a channel to transmit gas leaking from the weld to the vent pipe. There is also a channel between the tray and the vent pipe. The sealing element is located between the tray and the vent pipe, thereby improving the accuracy of leak gas detection. The sensor is located on the tray, and the gas pressure is detected by the interaction caused by the gas reaching the sensor's interior.

[0034] The present invention is further configured such that the sealing between the sealing ring and the plastic ring is achieved by pressing the air inlet tube downward, the sealing ring being locked by the plastic ring, and then slowly pulling it back upward, thereby achieving the sealing purpose through the pressing of the plastic ring and the sealing ring. The sealing ring is located on the upper shell.

[0035] The present invention is further configured such that the sealed connection between the gas vent pipe and the connector is due to the thread between the gas vent pipe and the connector, and the two are connected by the thread. The gas vent pipe opening is the channel through which the gas leaking from the weld enters the gas vent pipe from the shell.

[0036] The present invention is further configured such that a sealing element is provided between the air venting pipe and the tray sealing channel to prevent gas leakage, and at the same time to enhance the friction between the tray and the air venting pipe, thereby making the connection between the two firm.

[0037] The present invention is further configured such that: the cover covers the top of the gas inlet pipe, increasing the airtightness of the entire device, reducing the leakage rate of leaked gas after detection by the sensor, and preventing an accident of deflagration due to excessively high concentration of natural gas outside the device.

[0038] This invention is used in the welded area of ​​the high-consequence zone pipe section after the pipeline construction is completed. When in use, the upper and lower shells are fitted onto the pipe body, and the pipe body is quickly fixed by the tightening components on the left and right sides. Subsequently, leakage monitoring of the welded area in the high-consequence zone is realized through the assembly of connectors and air vent pipes, thereby effectively improving the reliability and safety of the high-consequence zone and pipeline operation.

[0039] More specifically:

[0040] A leak detection device for buried natural gas pipelines in high-consequence areas includes: an upper shell 2 and a lower shell 3. The upper shell 2 and lower shell 3 have internal elastic supports 19. Horizontal plates 16 are provided on the left and right outer sides of the upper shell 2 and lower shell 3. Nine tightening assemblies consisting of nuts 13 and threaded fasteners 14 are provided on the horizontal plates 16. Sealing tape 12 and sealing rings 15 are provided on both the left and right ends of the upper shell 2 and lower shell 3 and the pipe body 1. A sealing ring 10 is located on the outer side of the opening in the middle of the upper shell 2. The top of the upper shell 2 is equipped with a leak detection device including: a connector 4, a gas inlet pipe 5, and a cap 6. The connector 4 has a threaded connection at the top, a plastic ring 11 at the bottom, and a corrugated pipe 20 in the middle. A downwardly recessed tray 7 is provided at the top of the gas inlet pipe 5.

[0041] The present invention is further configured such that: a sensor 9 is placed above the tray 7, a sealing element 8 is provided at the connection between the air duct 5 and the tray 7, and a cover 6 is provided on the top of the tray 7.

[0042] The present invention is further configured such that: the horizontal plate 16 is provided with 9 tightening assemblies consisting of nuts 13 and threaded fasteners 14, and the external threads of the threaded fasteners are fitted with nuts 13.

[0043] The present invention is further configured such that: the opening at the middle of the upper shell 2 is located directly above the weld of the pipe body 1, and the upper shell 2 and the connecting piece 4 are sealed by pressing the sealing ring 10 and the plastic ring 11 together.

[0044] The present invention is further configured such that the connector 4 is connected to the air duct 5 by a thread.

[0045] The present invention is further configured such that: an elastic support 19 is provided between the upper shell 2 and the lower shell 3 and the tube 1, thereby achieving the stability of the overall shell.

[0046] The present invention is further configured as follows: a tube 1 is disposed between the upper shell 2 and the lower shell 3.

[0047] Example 2

[0048] like Figures 1 to 7 As shown, as a further optimization of Embodiment 1, this embodiment also includes the following technical features based on Embodiment 1:

[0049] like Figure 1 As shown, to address the issue of weld leakage over time, the pipe body 1 with weld 18 is enclosed by an upper shell 2 and a lower shell 3. Sealing tape 12 is applied to both sides of the upper shell 2 and lower shell 3 to reinforce the contact surface between the pipe body and the shell, preventing leakage. Horizontal plates 16 are provided on the left and right sides of the exterior of the upper shell 2 and lower shell 3. The contact portion of the horizontal plates 16 has interlocking, staggered teeth. Sealing gaskets 17 are placed between the horizontal plates 16 for filling gaps. Nine tightening assemblies consisting of nuts 13 and threaded fasteners 14 are provided on the horizontal plates 16, achieving a tight seal between the shell and the pipe body. After sealing with tightening force, the two ends of the tubular shell 2 and lower shell 3 are sealed with two annular sealing rings 15 to enhance the sealing effect. To ensure a perfect seal, the toothed portions of the sealing tape on the inner sides of both ends of the shell 2 and shell 3, which increase friction, are sealed with sealing tape 12 at the connection points with the pipe body 1.

[0050] The protruding part (channel 21) connecting the housing 2 to the main device is a tube perpendicular to the housing 2. The connector 4 is connected to the protruding part of the housing 2 by a sealing ring 10. The plastic ring 11 on the connector 4 is used to prevent the sealing ring 10 from falling off and to increase friction. The mouth of the air intake tube 5 is connected to the connector 4 by threads. A corrugated tube 20 is provided in the middle of the air intake tube 5 to facilitate the adjustment of the direction of the air intake tube when restricted by geological or other factors. The sensor 9 is placed on the tray 7, which is placed on top of the air intake tube 5, and the gap between the tray 7 and the air intake tube 5 is filled with a seal 8 to prevent leakage. The cap 6 completely covers the top of the air intake tube 5, including the sensor 9, the tray 7, and the seal 8.

[0051] Working principle: When a leak occurs at weld 18, the leaked natural gas enters the gas inlet pipe 5 through channel 21 because it is enclosed by the upper shell 2. When the natural gas in the gas inlet pipe 5 is under positive pressure due to the leak, it is detected by sensor 9 in tray 7, indicating that the weld should be repaired in time to avoid a safety accident.

[0052] As described above, the present invention can be implemented well.

[0053] All features disclosed in all embodiments of this specification, or steps in all methods or processes implied in the disclosure, may be combined and / or extended or replaced in any way, except for mutually exclusive features and / or steps.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A buried natural gas pipeline leak detection apparatus, characterized by, It includes a lower housing (3) and an upper housing (2) located above the lower housing (3). The upper housing (2) has a channel (21), and an air intake pipe (5) is located above the channel (21). A sensor (9) is located inside the air intake pipe (5).

2. The apparatus for detecting a leak in a buried natural gas pipeline according to claim 1, wherein It includes a connector (4), and the channel (21) is connected to the air intake tube (5) via the connector (4).

3. A buried natural gas pipeline leak detection apparatus according to claim 2, wherein This includes a bellows (20) fitted over the connector (4).

4. The apparatus of claim 1, wherein the at least one sensor is a gas sensor. Both the upper shell (2) and the lower shell (3) have horizontal plates (16) connected to their outer surfaces.

5. The apparatus for detecting a leak in a buried natural gas pipeline according to claim 1, wherein It includes a sealing ring (10), a plastic ring (11), and the outer wall of the channel (21), the sealing ring (10), and the plastic ring (11) are connected in sequence.

6. The apparatus of claim 1, wherein, Includes a tray (7) and a sensor (9) inside.

7. The apparatus of claim 1, wherein, Includes a cap (6) located at the top of the air intake tube (5).

8. The apparatus of claim 1, wherein, Both ends of the upper housing (2) and the lower housing (3) are provided with a wrapping sealing strip (12).

9. The apparatus of claim 1, wherein, Both ends of the upper housing (2) and the lower housing (3) are provided with sealing rings (15).

10. A device for detecting leaks in a buried natural gas pipeline according to any one of claims 1 to 9, characterized in that, The channel (21) is a hollow structure that protrudes upward from the upper shell (2).

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