A non-intrusive piezoelectric gas pipeline leakage infrasonic detection device
A gas pipeline and detection device technology, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as gas pipeline leakage of acoustic signals, and achieve the effects of improving applicability, easy maintenance and simple structure
Active Publication Date: 2016-03-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
[0011] Existing patents rarely involve non-intrusive detection, and no patents have been found on gas pipeline leak detection based on non-intrusive infrasonic sensor detection of leakage acoustic wave signals propagating along the internal medium of the pipeline or 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 piezoelectric infrasonic detection device for gas pipeline leakage, including a magnetic base (1), a base (2), a protective shell (3), a stressed diaphragm (4), and an acceleration compensation block (5) , a piezoelectric crystal (6), an electrode (7), a conduction circuit (8), an integrated circuit amplifier (9), a signal output terminal (10), a sleeve (11) and a protective film (12). The magnetic base (1) has magnetism and can be adsorbed on the outside of the gas pipeline wall (14), and the base (2) can fix the supporting device; the protective shell (3) is for the acceleration compensation block (5), the piezoelectric crystal (6), The electrode (7), the conduction circuit (8), the integrated circuit amplifier (9...
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The invention discloses a non-intrusive piezoelectric gas pipeline leakage infrasonic wave detection device which comprises a magnetic pedestal, a base, a protective shell, a stress membrane, an acceleration compensation block, a piezoelectric crystal, an electrode, a conduction circuit, an integrated amplifier, a signal output end, a protective film and a sleeve. The non-intrusive piezoelectric gas pipeline leakage infrasonic wave detection device is fixedly installed on the outer side of the pipe wall of a gas pipeline under the attraction action between the magnetic pedestal and the pipe wall, and conducts leakage detection by sensing an infrasonic wave signal which is propagated along a gaseous medium in the gas pipeline or an infrasonic wave signal which is propagated along the pipe wall at the time of gas pipeline leakage. The specific process comprises the steps that the magnetic pedestal is attracted to the pipe wall, the protective shell is tightly screwed so that the stress membrane can be tightly attached to the pipe wall, the infrasonic wave signal which is propagated along the gaseous medium or the infrasonic wave signal which is propagated along the pipe wall is sensed, the acceleration compensation block connected with the infrasonic wave signal is used for acceleration compensation, the piezoelectric crystal is made to generate an electric charge, the electric charge is guided by the electrode to flow through the conduction circuit and the integrated amplifier, and the infrasonic wave signal is output through the signal output end finally.
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 piezoelectric gas pipeline leakage infrasonic detection device. Background technique [0002] Leakage of natural gas pipelines not only wastes energy, 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, timely and accurate detection of leakage is a key issue in gas pipeline leak detection. [0003] The current gas pipeline leak detection methods include mass / volume balance method, applied statistics method, negative pressure wave method, transient model method, distributed optical fiber method and acoustic wave method, etc. However, these methods, including the current acoustic wave method, mostly use perforated sensors for installation, which not only affects the fluid flow state, leads t...
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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 CHINA UNIV OF PETROLEUM (EAST CHINA)