A non-intrusive capacitive gas pipeline leakage infrasonic detection device
A gas pipeline, non-intrusive technology, used in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as gas pipeline leakage, leakage of acoustic signals, etc., to improve applicability, high sensitivity, and easy maintenance. Effect
Active Publication Date: 2016-03-02
北立传感器技术(武汉)有限公司
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Problems solved by technology
[0011] Existing patents rarely involve non-invasive detection, and no patents have been found on gas pipeline leak detection based on non-invasive infrasonic sensor detection of leakage acoustic wave signals transmitted by the medium inside the pipeline or infrasonic wave signals transmitted along the pipe wall
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.
[0020] Such as figure 1 As shown, a non-intrusive capacitive infrasonic detection device for gas pipeline leakage, including a magnetic base (1), a base (2), a protective shell (3), a stressed diaphragm (4), a conduit (5), and a diaphragm (6), double capacitor (7), preamplifier (8), voltage circuit (9) and signal output terminal (10). The magnetic base (1) is magnetic and can be adsorbed on the outside of the gas pipeline wall (12), and the base (2) can fix the support device; the protective shell (3) is hollow inside, and it is suitable for the stressed diaphragm (4) and conduit (5) , Diaphragm (6) and double capacitor (7) are protected, and the thread (11) is used to feed and cooperate with the base, the protective shell (3) can be screwed tightly, and the double...
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The invention discloses a non-intervention capacitive type gas pipeline leakage infrasonic wave detection device. The non-intervention capacitive type gas pipeline leakage infrasonic wave detection device comprises a magnetic substrate, a base, a protective shell, a stress separation membrane, a guide pipe, a membrane, double capacitors, a pre-amplifier, a voltage circuit and a signal output end. According to the non-intervention capacitive type gas pipeline leakage infrasonic wave detection device, the magnetic substrate is attracted and fixedly installed on the outer side of the pipe wall of a gas pipeline, and leakage is detected by sensing an infrasonic wave signal transmitted along a gas medium in the pipeline or an infrasonic wave signal transmitted along the pipe wall when the gas pipeline leaks. According to the specific process, the magnetic substrate is attracted on the pipe wall, the protective shell is tightly screwed to enable the stress separation membrane to be tightly attached to the pipe wall, the infrasonic wave signal transmitted along the gas medium or the infrasonic wave signal transmitted along the pipe wall is sensed, the guide pipe connected with the membrane enables the membrane to vibrate and move, then the double capacitors generate charges, and the signal is amplified by the pre-amplifier, converted into voltage through the voltage circuit and finally output by the signal output end.
Description
technical field [0001] The invention belongs to the technical field of gas transmission pipeline fault diagnosis and flow safety assurance, and in particular relates to a non-intervention capacitive gas pipeline leakage infrasonic detection device. Background technique [0002] With the large-scale laying of natural gas pipelines, pipeline leakage due to corrosion, cracks, fatigue damage and third-party damage occurs from time to time, which not only causes energy waste, pollutes the environment, but also endangers people's lives and health. Especially when the gas in the gas pipeline is flammable, explosive or toxic gas, it is a key issue in the gas pipeline leak detection to be able to timely and accurately find the leak and precisely locate the location of the leak. [0003] Gas pipeline leak detection methods currently include mass / volume balance method, applied statistics method, negative pressure wave method, transient model method, distributed optical fiber method and...
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IPC IPC(8): F17D5/06
Inventor 李玉星刘翠伟李雪洁孟令雅钱昊铖曹鹏飞刘光晓
Owner 北立传感器技术(武汉)有限公司