Buried gas pipeline leakage characteristic simulation device

Abstract

The utility model discloses a buried gas pipeline leakage characteristic simulation device, which is used for adjusting a pipeline support A and a pipeline support B through a support knob to regulate and control the inclination angle of a leakage pipeline, and is used for simulating the leakage characteristic of the leakage pipeline through a sonic sensor and a PC (Personal Computer) processing host. The digital camera focuses on the covering soil on the leakage point of the leakage pipeline in the box body, the image and sound wave information of the covering soil eroded by the leakage gas of the buried gas pipeline are analyzed and extracted, the hoses at the two ends of the leakage pipeline are detached after a group of experiments is finished, and the digital camera records holes formed by the covering soil in the box body A and the box body B due to gas erosion; when the device is used, the drawing plate A and the drawing plate B can be drawn out respectively, covering soil can be poured out quickly, leaked pipelines can be cleaned, the influence of leakage conditions of buried gas pipelines with different pipe diameters, leakage hole diameters, leakage positions and the like on the covering soil structure can be obtained efficiently, and the device is high in practicability, safety and testing efficiency, flexible to operate, convenient to build and install and free of environmental pollution.

Description

Technical Field

[0001] The utility model relates to the field of safe transportation of natural gas pipelines, and relates to a leakage characteristic simulation device for buried gas transmission pipelines. Background Art

[0002] At present, the concept of natural gas safety production and management is constantly improving, and the problem of buried gas pipeline leakage has received more and more attention. Related research has become a hot research direction in academia. However, the current indoor buried gas pipeline leakage simulation device is not perfect, and the operation is extremely inconvenient and time-consuming. The utility model improves the box simulation device to achieve the purpose of adjusting the pipeline inclination angle, quickly changing the covering soil, and setting different leakage pipelines, greatly shortening the leakage characteristic test time of multiple groups of buried gas pipelines, and significantly improving the efficiency of the buried gas pipeline leakage characteristic simulation experiment. Summary of the invention

[0003] The utility model provides a buried gas pipeline leakage characteristic simulation device, which can obtain the acoustic wave characteristics of the buried gas pipeline leakage, improve the visibility of the buried gas pipeline leakage on the erosion process of the covering structure, and shorten the preparation time for the buried gas pipeline leakage characteristic experiment.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a buried gas pipeline leakage characteristic simulation device, including an air compressor, a buffer tank, a mass flow meter A, a box, a leakage point, a mass flow meter B, an acoustic sensor, a PC processing host, a vent, a digital camera, a box A, a tapered hole fixing plate A, a leaking pipeline, a pipeline bracket A, a box B, a base, a drawer plate A, a tapered hole, a bracket knob, a connecting notch, a convenient lifting hole, a slide, a hose, a pipeline bracket B, a tapered hole fixing plate B, and a drawer plate B.

[0005] The box body is composed of box body A and box body B through the connecting groove of the base, so that the box body can be quickly split into two identical parts. Rectangular holes are provided at the bottom of the side of box body A and box body B, respectively equipped with conical hole fixing plates A and conical hole fixing plates B, so that the setting of the leakage pipeline is more convenient. Slides are provided at the bottom of box body A and box body B, respectively equipped with drawer plates A and drawer plates B, so that the box body can be quickly replaced with covered soil.

[0006] The leakage pipe is arranged at the bottom of the box, and its two ends pass through the tapered hole fixing plate A and the tapered hole fixing plate B respectively, and are equipped with pipe brackets A and pipe brackets B to support and control the horizontal and inclination angles of the leakage pipe.

[0007] Mass flowmeter A and mass flowmeter B have knob switches. An acoustic sensor is set on the soil surface in the box. The acoustic sensor is connected to a PC processing host. The PC processing host analyzes and processes the acoustic signal. A digital camera is set next to the box to collect image data of the macroscopic change process of the soil covering structure.

[0008] The air compressor, buffer tank, mass flow meter A, leakage pipe and mass flow meter B are connected through a hose.

[0009] Utilize the buried gas pipeline leakage characteristic simulation device described above to analyze and extract images and acoustic wave information of the buried gas pipeline leakage gas eroding the covering soil, and obtain the influence of the buried gas pipeline leakage conditions such as different pipe diameters, leakage apertures, and leakage locations on the covering soil structure. Start the air compressor, slowly open the buffer tank, check the air tightness of the device, and let the gas be discharged through the leakage point and vented. Set the support height of the pipe support A and pipe support B through the support knob, adjust the inclination angle of the leaking pipe, add covering soil to the box according to the required covering soil thickness, and compact the covering soil at intervals of a certain covering soil thickness. Set the acoustic wave sensor at a certain distance on the surface of the covering soil, connect the acoustic wave sensor and the PC processing host, focus the digital camera on the covering soil at the leakage point of the leaking pipe in the box, ensure the normal operation of the acoustic wave sensor, PC processing host, and digital camera, start the air compressor, control the gas pressure through the buffer tank, and when the covering soil surface The air compressor is turned off, the remaining gas in the buffer tank is vented, the hoses at both ends of the leaking pipeline are removed, box A and box B are separated, and the holes formed by gas erosion in the covering soil in box A and box B are recorded with a digital camera. Pull out the extraction plate A and the extraction plate B respectively, quickly pour out the covering soil, take out and clean the leaking pipeline, clean box A and box B respectively, ensure the independence of each experiment, save the acoustic wave data, covering soil erosion image, and mass flow recorded in the experiment on the PC processing host, analyze and process the experimental data, and obtain the leakage characteristics of the buried gas pipeline simulated in this experiment and the influence of the covering soil structure on the erosion of the buried gas pipeline.

[0010] The utility model adopts the above technical solution and has the following advantages:

[0011] 1. The device for simulating leakage characteristics of buried gas pipelines uses a box made of highly transparent PVC board with excellent light transmittance, which makes the gas erosion and covering process visible. The box width is close to the outer diameter of the leaking pipeline, so that the holes formed by gas erosion and covering can quickly reach the box wall. Rectangular holes are set at the bottom of both sides of the box to facilitate the rapid setting of the leaking pipeline. The box is equipped with a tapered hole fixing plate to keep the soil in the box intact. A drawer is set at the bottom of the box to quickly replace the covering soil. The box is composed of two identical parts combined by a base. The device can shorten the preparation time between groups of buried gas pipeline leakage simulation experiments and reduce the time consumption of experimenters.

[0012] 2. The buried gas pipeline leakage characteristic simulation device, the leakage pipeline is connected to the mass flow meter, buffer tank, and air compressor through a hose, so that the device has higher flexibility. Pipe supports are set at both ends of the leakage pipeline. The height of the support can be adjusted by the knob on the pipe support, and the inclination angle of the leakage pipeline is set by the height difference of the support.

[0013] 3. The buried gas pipeline leakage characteristic simulation device is equipped with an acoustic sensor and a digital camera. The acoustic sensor enables the device to collect the acoustic wave frequency generated by gas erosion of the covering soil when the buried gas pipeline leaks. The device records the process of gas erosion of the covering soil through a digital camera, providing more intuitive image information on the leakage characteristics of the buried gas pipeline and the structural changes of the covering soil affected by the leakage of the buried gas pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a leakage simulation flow chart of a buried gas pipeline of the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the box body of the utility model;

[0016] Figure 3 It is a cross-sectional view of the box body of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the tapered hole fixing plate of the utility model;

[0018] Figure 5 This is a schematic diagram of the pipeline support structure of the utility model;

[0019] Figure 6 This is a schematic diagram of the base structure of the utility model;

[0020] Figure 7 It is a schematic diagram of the drawer structure of the utility model.

[0021] in:

[0022] (1) air compressor; (2) buffer tank; (3) mass flow meter A; (4) housing; (5) leakage point; (6) mass flow meter B; (7) acoustic sensor; (8) PC processing host; (9) venting; (10) digital camera; (11) housing A; (12) tapered hole fixing plate A; (13) leakage pipe; (14) pipe bracket A; (15) housing B; (16) base; (17) drawer plate A; (18) tapered hole; (19) bracket knob; (20) connection slot; (21) convenient lifting hole; (22) slideway; (23) hose; (24) pipe bracket B; (25) tapered hole fixing plate B; (26) drawer plate B. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] The utility model relates to a device for simulating leakage characteristics of buried gas pipelines. The device comprises an air compressor, a buffer tank, a mass flow meter A, a box, a leakage point, a mass flow meter B, an acoustic sensor, a PC processing host, a vent, a digital camera, a box A, a tapered hole fixing plate A, a leakage pipeline, a pipeline bracket A, a box B, a base, a draw plate A, a tapered hole, a bracket knob, a connection notch, a convenient lifting hole, a slide, a hose, a pipeline bracket B, a tapered hole fixing plate B, and a draw plate B. As shown in Figures (1) to (7), the box (4) is composed of a box A (11) and a box B (15) through a connection notch (20) of a base (16). A rectangular hole is provided at the bottom of the side of the box A (11), and a tapered hole fixing plate A (12) having a tapered hole (18) is provided. The box B (15) is completely the same as the box A (11) and is provided with a tapered hole fixing plate B (25). A slideway (22) is provided at the bottom of the box body A (11) and the box body B (15), and a draw plate A (17) and a draw plate B (26) are provided respectively. The leakage pipe (13) is provided at the bottom of the box body (4), and the two ends thereof pass through the conical hole fixing plate A (12) and the conical hole fixing plate B (25) respectively. A pipe support A (14) and a pipe support B (24) are provided to support and control the horizontal and inclination angles of the leakage pipe (13). The mass flow meter A (3) and the mass flow meter B (6) have a knob switch. An acoustic wave sensor (7) is provided on the soil covering surface in the box body (4), and the acoustic wave sensor (7) is connected to a PC processing host (8), and the acoustic wave signal is analyzed and processed by the PC processing host (8). A digital camera (10) is provided beside the box body (4) to collect image data of the macroscopic change process of the soil covering structure. The air compressor (1), the buffer tank (2), the mass flow meter A (3), the leakage pipe (13), and the mass flow meter B (6) are connected through a hose (23).

[0025] When in use, firstly, according to the simulated conditions of the leakage characteristics of the buried gas pipeline, a suitable leakage pipe (13) is selected at the leakage point (5), the box body A (11) and the box body B (15) are connected by the base (16) through the connecting groove (20) to form a box body (4), the draw plate A (17) and the draw plate B (26) are installed on the box body A (11) and the box body B (15) through the slideway (22), the leakage pipe (13) is placed at the bottom of the box body (4), the two ends of the leakage pipe (13) are respectively passed through the tapered hole fixing plate A (12) and the tapered hole fixing plate B (25), and the tapered hole fixing plate A (12) and the tapered hole fixing plate B (25) are respectively installed in the box body A (11) and the box body B (15), and the hose (2 3) Connect the air compressor (1), buffer tank (2), mass flow meter A (3), leakage pipe (13), and mass flow meter B (6) in sequence, start the air compressor (1), slowly open the buffer tank (2), check the air tightness of the device, and discharge the gas through the leakage point (5) and the vent (9). Install the pipe support A (14) and the pipe support B (24) at both ends of the leakage pipe (13) respectively. According to the simulation conditions, set the support height of the pipe support A (14) and the pipe support B (24) through the support knob (19), adjust the inclination angle of the leakage pipe (13), add soil to the box (4) according to the required soil cover thickness, and compact the soil at a certain soil cover thickness. Press the acoustic wave sensor (7) The apparatus is arranged at a certain distance on the soil surface, connected with an acoustic wave sensor (7) and a PC processing host (8), and a digital camera (10) is focused on the soil on the leakage point (5) of the leakage pipe (13) in the box (4), and the operation of the acoustic wave sensor (7), the PC processing host (8), and the digital camera (10) is ensured to be normal. The air compressor (1) is turned on, and the gas pressure is controlled through the buffer tank (2). When the soil surface is broken by the gas, the air compressor (1) is turned off, and the remaining gas in the buffer tank (2) is vented (9), and the hoses (23) at both ends of the leakage pipe (13) are removed, and the box A (11) and the box B (15) are separated, and the soil in the box A (11) and the box B (15) are formed by gas erosion. Holes are recorded using a digital camera (10), draw out the drawer plate A (17) and the drawer plate B (26) respectively, quickly pour out the covering soil, take out and clean the leaking pipeline (13), clean the box A (11) and the box B (15) respectively, ensure the independence of each experiment, and finally save the acoustic wave data, the erosion image of the covering soil, and the mass flow recorded in the experiment on the PC processing host (8), and analyze and process the experimental data to obtain the leakage characteristics of the buried gas pipeline simulated in this experiment and the influence of the covering soil structure on the erosion of the buried gas pipeline. Repeat the above steps to quickly complete the simulation experiment of the leakage characteristics of the buried gas pipeline under different pipe diameters, leakage apertures, leakage locations, pipeline burial depths, covering soil types, gas flow rates, and gas pressures.

Claims

1. A buried gas pipeline leakage characteristic simulation device, comprising an air compressor, a buffer tank, a mass flow meter A, a box, a leakage point, a mass flow meter B, an acoustic sensor, a PC processing host, a vent, a digital camera, a box A, a tapered hole fixing plate A, a leaking pipeline, a pipeline support A, a box B, a base, a draw plate A, a tapered hole, a support knob, a connection notch, a convenient lifting hole, a slide, a hose, a pipeline support B, a tapered hole fixing plate B, and a draw plate B, characterized in that: The hose connects the air compressor, buffer tank, mass flowmeter A, leakage pipe and mass flowmeter B in sequence. The leakage pipe is located at the bottom of the box body. A leakage hole is provided in the middle of the leakage pipe. Gas flows in from the lower end of the mass flowmeter and flows out from the upper end. The air compressor is connected to the buffer tank through a hose. The buffer tank ensures the stability of the gas pressure and the stability of the gas pressure in the leakage pipe. The acoustic wave sensor is connected to the soil covering surface and the PC processing host to collect the acoustic wave signal of the gas eroding the soil covering through the leakage pipe, and the PC processing host analyzes and processes the signal.

2. The buried gas pipeline leakage characteristic simulation device according to claim 1, characterized in that: The box is made of highly transparent PVC board. The box is long and narrow and its width is close to the outer diameter of the pipe. The box is composed of two identical boxes spliced ​​through a base. There are rectangular holes on the bottom of both sides of the box, and it is equipped with a conical hole fixing plate and a drawer plate at the bottom. The conical hole fixing plate has a truncated cone-shaped conical hole.

3. The buried gas pipeline leakage characteristic simulation device according to claim 1, characterized in that: There are two pipe supports, which are respectively arranged at both ends of the pipe. The connection of the pipe supports is adjusted by a knob, and the height of the support can be adjusted by the knob. The two ends of the leakage pipe pass through the tapered hole fixing plates of the box respectively, and the inclination angle of the pipe is adjusted by the pipe support. The buried depth of the leakage pipe is controlled by the thickness of the covering soil in the box.

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