Sulfur hexafluoride gas sampling device

Abstract

The invention discloses a sulfur hexafluoride gas sampling device, comprising a base and a shell which is provided with an external equipment interface and is arranged on the base. A gas washing bottle, a sampling bottle and a multi-way valve with at least four connection openings are arranged in the shell; a hydrogen fluoride gas colorimetric mechanism is arranged outside the shell; the four connection openings of the multi-way valve are respectively connected with the connection opening of the external equipment of the shell, the gas washing bottle, the sampling bottle and the hydrogen fluoride gas colorimetric mechanism through a gas guide pipe; and an operation handle for opening and closing each connection opening of the multi-way valve is externally arranged on the shell. The hydrogen fluoride gas colorimetric mechanism disclosed by the invention has the advantages of compact and reasonable structure, beautiful and elegant appearance, simple and clear operation process, convenience for maintenance, flexibility in use and relatively individual functions, and has functions of carrying out hydrogen fluoride gas colorimetric detection, displaying pressure of a sampled gas on a pressure meter during sampling, assisting in heating in a process of vacuumizing the sampling device and the like. Therefore, the vacuumization is accelerated and residual matters in a container of the sampling device are released completely, so as to achieve a real numerical value which is the same of the numerical value of an original gas when the sampling is carried out.

Description

technical field [0001] The invention relates to a gas sampling and detection device, in particular to a sulfur hexafluoride gas sampler. Background technique [0002] Sulfur hexafluoride (SF6) gas has stable chemical properties, good insulation and arc extinguishing properties, and is widely used in high-voltage electrical equipment. Parameters such as the purity, dew point, moisture content, and types and contents of decomposition products of sulfur hexafluoride gas have a direct impact on the safe and reliable operation of high-voltage electrical equipment. Therefore, the relevant standards of the national power industry such as GB8905-1996 Sulfur hexafluoride gas management and detection guidelines in electrical equipment ", DL / T639-1997 "Sulfur hexafluoride electrical equipment operation, test and maintenance personnel safety protection rules" all stipulate that sulfur hexafluoride gas in high-voltage electrical equipment should be regularly checked Carry out sampling a...

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Problems solved by technology

[0003] At present, sampling steel cylinders are generally used for sampling electrical equipment, gas storage tanks, and gas storage cylinders that use sulfur hexafluoride gas. This kind of sampling steel cylinder is likely to be mixed with air during the sampling process, and there are gas impurities on the inner wall of the steel cylinder. It will cause decomposition and secondary pollution to the sulfur hexafluoride gas sample. After sampling, the data taken to the laboratory for analysis is naturally inaccurate, and there are large errors

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