CN215598642U

CN215598642U - Device for measuring influence of aperture on micro-leakage sound wave signal of gas transmission pipeline

Info

Publication number: CN215598642U
Application number: CN202121535476.7U
Authority: CN
Inventors: 洪雪; 徐佳
Original assignee: Southwest Branch Of China Petroleum Engineering & Construction Corp
Current assignee: Southwest Branch Of China Petroleum Engineering & Construction Corp
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-01-21
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses a device for measuring the influence of an aperture on a micro-leakage sound wave signal of a gas transmission pipeline. The outlet forms a circulation loop with the second ball valve, the booster pump, the third ball valve and the inlet in sequence; the methane storage tank is sequentially connected with the second gas flowmeter and the fifth ball valve, and the nitrogen storage tank is sequentially connected with the first gas flowmeter and the fourth ball valve; the sound wave sensor, the pressure sensor and the constant temperature heater are connected with the monitoring control system. The utility model has convenient operation and easy flow, and can accurately measure the change condition of the sound wave signal under the micro-leakage apertures of different gas transmission pipelines.

Description

Device for measuring influence of aperture on micro-leakage sound wave signal of gas transmission pipeline

Technical Field

The utility model relates to a measuring device, in particular to a device for measuring the influence of an aperture on a micro-leakage sound wave signal of a gas transmission pipeline.

Background

In the process of natural gas pipeline transportation, pipeline leakage accidents inevitably occur due to natural factors and human factors, and great threat is caused to the society and the environment. The leakage of the gas pipeline mainly has the following aspects, such as the quality of the gas pipeline is not over-qualified, the pipeline installation and construction problems, the planning and construction are not reasonable enough, the pipeline corrosion problems and the like. However, when the gas transmission pipeline begins to leak, the gas transmission pipeline often has tiny leakage, and due to the large volume of the pipeline and the compressibility of gas, the change of pressure in the pipeline is relatively small when the tiny leakage occurs; it is not easy to be perceived, causing the potential safety hazard to be more serious. When the gas has small leakage, the leakage hole can excite continuous sound wave signal, which is superposed with background noise and can be measured by sound wave sensor. At present, the research on detecting the micro leakage hole of the gas transmission pipeline by using the sound wave signal is less, and the research on the sound wave signal condition around the leakage hole after the micro leakage of the gas transmission pipeline can be carried out, so that the method has important engineering significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a device for measuring the influence of apertures on a micro-leakage sound wave signal of a gas transmission pipeline, which is used for measuring the influence of different aperture sizes on the micro-leakage sound wave signal of the gas transmission pipeline.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a measure device of aperture to gas transmission pipeline microleakage sound wave signal influence, measuring device is by monitoring control system, base, export, first ball valve, second ball valve, gas-supply pipe, force (forcing) pump, sound wave sensor, let out leakage hole, constant temperature heater, pressure sensor, import, third ball valve, first gas flowmeter, nitrogen gas storage tank, fourth ball valve, methane storage tank, second gas flowmeter, fifth ball valve. The outlet forms a circulation loop with the second ball valve, the booster pump, the third ball valve and the inlet in sequence; the methane storage tank is sequentially connected with the second gas flowmeter and the fifth ball valve, and the nitrogen storage tank is sequentially connected with the first gas flowmeter and the fourth ball valve; the sound wave sensor, the pressure sensor and the constant temperature heater are connected with the monitoring control system.

Furthermore, the leakage hole is positioned at the middle upper part of the gas conveying pipe and used for simulating the leakage hole during leakage under the actual working condition.

Furthermore, the aperture size of the leakage hole is changed according to 1mm, 2mm, 3mm, 4mm and 5mm in the whole measuring process, and the test measurement is carried out in sequence.

Furthermore, leak the hole about both sides be equipped with a sound wave sensor respectively, and be the symmetry setting, its purpose is used for measuring the sound wave signal that leaks the hole and send, belongs to prior art, no longer gives details here.

Furthermore, a pressure sensor is arranged at the left part of the gas transmission pipe and used for measuring the pressure change condition in the pipe after the gas transmission pipe generates micro leakage.

Furthermore, the inlet and the outlet are the same in size, so that the pressure of the left end and the pressure of the right end of the natural gas in the pipeline are the same in the circulation process.

Furthermore, the gas transmission pipe is wrapped by the constant temperature heater, and the heating temperature of the constant temperature heater is controlled by the monitoring control system.

Furthermore, the nitrogen storage tank is used for ventilating before the measurement test is started, so that the safety is ensured.

Further, the first ball valve is used for emptying.

Further, the first ball valve, the second ball valve, the third ball valve, the fourth ball valve and the fifth ball valve are the same ball valve.

Further, the function of the booster pump is to pressurize the natural gas in the natural gas circulation process, which belongs to the prior art and is not described herein again.

Compared with the prior art, the utility model has the advantages that: (1) the sound wave sensors are respectively arranged on the left side and the right side of the leakage hole to measure sound wave signals sent out by the leakage hole, so that the measurement accuracy is improved; (2) the left part of the gas transmission pipe is provided with the pressure sensor, so that after the gas transmission pipe generates micro leakage, the pressure in the pipe is monitored, and the pressure change condition is observed; (3) the sizes of the inlet and the outlet are the same, so that the pressures at two ends of the gas pipe are the same, and the measurement process is not influenced; (4) the utility model has the advantages of convenient operation, easy understanding of principle and easy flow, and can accurately measure the change condition of the sound wave signals under the micro-leakage apertures of different gas transmission pipelines.

Drawings

Fig. 1 is a schematic structural diagram of an apparatus for measuring the influence of an aperture on a micro-leakage sonic signal of a gas transmission pipeline according to the present invention.

In the figure: 1. the monitoring control system comprises a monitoring control system, 2, a base, 3, an outlet, 4, a first ball valve, 5, a second ball valve, 6, a gas pipe, 7, a booster pump, 8, a sound wave sensor, 9, a leakage hole, 10, a constant temperature heater, 11, a pressure sensor, 12, an inlet, 13, a third ball valve, 14, a first gas flowmeter, 15, a nitrogen storage tank, 16, a fourth ball valve, 17, a methane storage tank, 18, a second gas flowmeter and 19, a fifth ball valve.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1, the device for measuring the influence of the aperture on the micro-leakage sound wave signal of the gas transmission pipeline comprises a monitoring control system 1, a base 2, an outlet 3, a first ball valve 4, a second ball valve 5, a gas transmission pipe 6, a pressure pump 7, a sound wave sensor 8, a leakage hole 9, a constant temperature heater 10, a pressure sensor 11, an inlet 12, a third ball valve 13, a first gas flowmeter 14, a nitrogen storage tank 15, a fourth ball valve 16, a methane storage tank 17, a second gas flowmeter 18 and a fifth ball valve 19; the outlet 3, the second ball valve 5, the booster pump 7, the third ball valve 13 and the inlet 12 form a circulation loop in sequence; the methane storage tank 17 is sequentially connected with a second gas flowmeter 18 and a fifth ball valve 19, and the nitrogen storage tank 15 is sequentially connected with a first gas flowmeter 14 and a fourth ball valve 16; the sound wave sensor 8, the pressure sensor 11 and the constant temperature heater 10 are connected with the monitoring control system 1.

As shown in fig. 1, which is a schematic structural diagram of a device for measuring the influence of an aperture on a micro-leakage sound wave signal of a gas transmission pipeline according to the present invention, when the change of the sound wave signal under different micro-leakage apertures of the gas transmission pipeline is measured, all ball valves are closed, then a nitrogen storage tank 15, a fourth ball valve 16, a third ball valve 13 and a first ball valve 4 are opened in sequence, so that nitrogen flows out from the nitrogen storage tank 15, a first gas flow meter 14 measures the nitrogen and then enters the gas transmission pipeline 6 from an inlet 12, the nitrogen discharges air in the gas transmission pipeline 6 from left to right through an outlet 3, and finally discharges the air from the first ball valve 4. After the gas in the gas transmission pipe 6 is nitrogen gas, the nitrogen gas storage tank 15 is closed, the fourth ball valve 16 is closed, the methane storage tank 17 is opened, the fifth ball valve 19 is opened, so that the methane gas flows out of the methane storage tank 17 and enters the gas transmission pipe 6 from the inlet 12 after being metered by the second gas flowmeter 18, the methane gas discharges the air in the gas transmission pipe 6 from left to right through the outlet 3, and finally is discharged from the first ball valve 4 in an emptying manner, the first ball valve 4 starts timing for 10 seconds after flowing out of the methane gas, then the second ball valve 5 is rapidly opened, the pressure pump 7 is rapidly opened, the first ball valve 4 is closed, and the methane gas circulates along the outlet 3, the second ball valve 5, the pressure pump 7, the third ball valve 13 and the inlet 12 to form a circulation loop. After 30 seconds of circulation, the methane storage tank 17 and the fifth ball valve 19 are closed quickly, then the methane gas is circulated on the circulation loop all the time under the action of the booster pump 7, then the constant temperature heater 10 is opened, and the temperature of the constant temperature heater 10 is controlled to be 25 ℃ by the monitoring and control system 1 so that the methane gas is circulated on the circulation loop at constant temperature.

And (4) circulating for 10 minutes, after various data areas displayed on the monitoring control system 1 are stabilized, opening the leakage hole 9 with the aperture of 1mm at the upper part in the gas transmission pipe 6, and simulating the working condition that the gas transmission pipe generates micro leakage under the actual working condition. And measuring the sound wave signal condition around the leakage hole 9 through the sound wave sensor 8, feeding the measured result back to the monitoring control system 1, displaying the sound wave signal change condition on the monitoring control system 1, and finishing the measurement of the leakage sound wave signal of the leakage hole 9 with the thickness of 1 mm. And then changing the aperture of the upper leakage hole 9 in the gas pipe 6 to be 2mm, 3mm, 4mm and 5mm in sequence, repeating the steps for measurement, and recording the sound wave signal result of the leakage hole 9 with the corresponding aperture. According to the measurement result, a relation curve between the aperture of the different leakage holes 9 and the sound wave signal and the pressure in the gas transmission pipe is drawn, and the result has important guiding significance for the site.

The utility model has convenient operation and easily understood principle, and can accurately measure the change condition of the sound wave signal under the micro-leakage apertures of different gas transmission pipelines.

Claims

1. The utility model provides a device of measurement aperture to gas transmission pipeline microleakage sound wave signal influence which characterized in that: the measuring device comprises a monitoring control system (1), a base (2), an outlet (3), a first ball valve (4), a second ball valve (5), a gas conveying pipe (6), a pressure pump (7), a sound wave sensor (8), a leakage hole (9), a constant temperature heater (10), a pressure sensor (11), an inlet (12), a third ball valve (13), a first gas flowmeter (14), a nitrogen storage tank (15), a fourth ball valve (16), a methane storage tank (17), a second gas flowmeter (18) and a fifth ball valve (19);

the outlet (3) sequentially forms a circulating loop with the second ball valve (5), the booster pump (7), the third ball valve (13) and the inlet (12); the methane storage tank (17) is sequentially connected with the second gas flowmeter (18) and the fifth ball valve (19), and the nitrogen storage tank (15) is sequentially connected with the first gas flowmeter (14) and the fourth ball valve (16); the sound wave sensor (8), the pressure sensor (11) and the constant temperature heater (10) are connected with the monitoring control system (1).

2. The apparatus of claim 1, wherein the apparatus is configured to measure the effect of the aperture on the leaky sonic signal of the gas transmission line, and further comprising: the leakage hole (9) is positioned at the middle upper part of the gas transmission pipe (6).

3. The apparatus of claim 2, wherein the means for measuring the effect of the aperture on the leaky sound wave signal comprises: the left side and the right side of the leakage hole (9) are respectively provided with a sound wave sensor (8) which are symmetrically arranged.

4. The apparatus of claim 1, wherein the apparatus is configured to measure the effect of the aperture on the leaky sonic signal of the gas transmission line, and further comprising: the left part of the gas transmission pipe (6) is provided with a pressure sensor (11).

5. The apparatus of claim 1, wherein the apparatus is configured to measure the effect of the aperture on the leaky sonic signal of the gas transmission line, and further comprising: the inlet (12) and the outlet (3) are the same in size.

6. The apparatus of claim 1, wherein the apparatus is configured to measure the effect of the aperture on the leaky sonic signal of the gas transmission line, and further comprising: the constant temperature heater (10) wraps the gas transmission pipe (6), and the heating temperature of the constant temperature heater is controlled by the monitoring control system (1).