A leak detection system and method for a liquid ammonia pipeline with a cladding layer based on pressure sensing
A technology of pipeline leakage and detection system, which is applied in the research field of liquid ammonia pipeline leakage detection to achieve the effect of improving safety, simple circuit principle and convenient maintenance work.
Active Publication Date: 2017-10-10
CHINA JILIANG UNIV
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Problems solved by technology
However, when the working environment is a liquid ammonia pipeline with a coating, the traditional pressure detection faces a more embarrassing situation
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[0059] The present invention will be further described below in conjunction with the accompanying drawings.
[0060] Such as Figure 1-4 The pressure-sensing-based liquid ammonia pipeline leakage detection system with cladding of the present invention includes a cladding device 1, a pressure sensor 2, a cable 3, a liquid ammonia pipeline 4 and a data processing system 5;
[0061] The cladding device 1 is wrapped around the liquid ammonia pipeline 4, and the cladding device 1 includes a cladding layer 1.1, an isolation member 1.2, and a support member 1.3, and the isolation member 1.2 is arranged between the cladding layer 1.1 and the liquid ammonia pipeline 4 The space between the cladding layer 1.1 and the liquid ammonia pipeline 4 is divided into mutually isolated airtight chambers, and a support member 1.3 for ensuring the free flow of gas in the airtight chamber is installed between the isolation members 1.2;
[0062] The cable 3 includes several first solenoid valves 3.1...
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The invention discloses a pressure sensing based liquid ammonia pipeline leak detection system with a cladding layer and a detection method. The pressure sensing based liquid ammonia pipeline leak detection system with the cladding layer comprises a cladding layer device, pressure sensors, cables, a liquid ammonia pipeline and a data processing system, wherein the cladding layer device wraps the liquid ammonia pipeline, an independent hermetic air chamber is formed in the cladding layer device, and the pressure sensors are mounted in the hermetic air chamber. When a specific position of the pipeline leaks, the pressure sensors transmit detection signals to the data processing system, and the data processing system computes to analyze the leaked position. The pressure sensing based liquid ammonia pipeline leak detection system is provided with a self-detecting unit for detecting line faults to guarantee normal running of the system. The pressure sensing based liquid ammonia pipeline leak detection system with the cladding layer has the advantages that the liquid ammonia pipeline leak detection system is simple in working circuit principle and is in the open-circuit state in absence of leak so as to be higher in safety; during leak, two effective data including single-stranded cable length and resistor disc resistance values of the pressure sensors can be detected, and long-distance liquid ammonia pipelines can be monitored by numbering a few sensors.
Description
technical field [0001] The invention relates to the research field of leakage detection of liquid ammonia pipelines, in particular to a leakage detection system and method for a liquid ammonia pipeline with a cladding layer under unconventional conditions based on pressure induction. Background technique [0002] In recent years, with the rapid development of my country's social economy, cold storage has been widely used in people's daily life as a tool for storing food and some special products. As a refrigerant (code R717) in the refrigeration system of cold storage, its thermodynamic properties are the best among all refrigerants, and it is currently the most widely used medium-temperature and medium-pressure refrigerant. In my country's large and medium-sized cold storage refrigeration systems, the use of ammonia as a refrigerant accounts for more than 80%. [0003] Measuring gas parameters based on pressure sensing is a safe and efficient measurement technique. It exh...
Claims
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IPC IPC(8): F17D5/02
CPCF17D5/02
Inventor 曲方胡凯李二明张亮董林翰
Owner CHINA JILIANG UNIV