Sulfur hexafluoride sampler for power equipment

Abstract

The present invention discloses a sulfur hexafluoride sampler for electric power equipment, comprising a base provided with a thick slideway and a thin slideway which are coaxially connected therein, wherein a slide block is slidingly inserted in the thick slideway, the outer end of the thick slideway is in screw connection with a screw tube, the tail end of the screw tube is in seal connection with an air bag, the outer end of the slide block is provided with a sealing plug in a clamping way, the base is also provided with a byway therein, on end of the byway is communicated with the middle part of the thin slideway, the other end of the byway is communicated with the thick slideway, the base is also provided with a vacuum cavity therein, a piston is arranged in the vacuum cavity, the piston is provided with a pull rod, the inner end of the vacuum cavity is communicated with the inner section of the thin slideway through a secondary way, the outer section of the thin slideway is provided with a connecting piece, the inner end of the slide block is fixedly provided with a sliding plug, a spring is arranged between the slide block and the thick slideway, the slide block is provided with a magnetic block, the thick slideway is provided with an electromagnet, and the base is provided with a principal button and an auxiliary button. The sulfur hexafluoride sampler for electric power equipment provided by the present invention has the advantages of quick sampling, simple operation, high sampling purity, convenient carrying, labor saving, less waste of sulfur hexafluoride, and low environment pollution.

Description

technical field [0001] The invention relates to a sulfur hexafluoride sampler for electric equipment. Background technique [0002] Sulfur hexafluoride (SF6) gas has a history of one hundred years. It is an artificial inert gas synthesized by two French chemists, Moissan and Lebeau, in 1900. Around 1940, the US military used it for the Manhattan Project (nuclear military). Commercially available in 1947. Currently SF6 gas is mainly used in the power industry. [0003] Sulfur hexafluoride has good electrical insulation performance and excellent arc extinguishing performance. Its electric strength is 2.5 times that of nitrogen under the same pressure, its breakdown voltage is 2.5 times that of air, and its arc extinguishing ability is 100 times that of air. It is a new generation of ultra-high voltage insulating dielectric material superior to that between air and oil. Sulfur hexafluoride is used in circuit breakers, high-voltage transformers, gas-enclosed combined capacito...

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Problems solved by technology

[0005] Since there is no national standard for sampling equipment, the current sampling of sulfur hexafluoride is done through the manufacturer's own sulfur hexafluoride filling equipment, which brings many problems: 1. The manufacturer's own sulfur hexafluoride Sulfur filling equipment is made for filling sulfur hexafluoride, all of which are equipped with special inflation equipment such as sulfur hexafluoride compression tanks and vacuum pumps. Although some equipment can also be used for sampling sulfur hexafluoride, the equipment uses 2. The sulfur hexafluoride filling equipment provided by the manufacturer is only suitable for the supporting power equipment produced by the factory, and is not suitable for other manufacturers. The same kind of power equipment, so the versatility is poor, so it is very troublesome to carry different sulfur hexafluoride filling equipment from different manufacturers during the inspection; The distance is relatively high, and operation must be carried out at heights; currently, there are generally two sampling methods when using heavy sulfur hexafluoride filling equipment for sampling. The first is to lift the sulfur hexafluoride filling equipment to the power equipment sampling place. It requires more manpower or the assistance of hoisting equipment; the second method is to place the sulfur hexafluoride filling equipment on the ground, and sample sulfur hexafluoride by laying sampling pipelines; although the second method does not require more Manpower or hoisting equipment is assisted, but the extended pipeline will store a large amount of sulfur hexafluoride after sampling, and the sulfur hexafluoride in the pipeline must be discharged when sampling the next power equipment to avoid causing damage to the next sampling. Therefore, the disadvantage of the second method is that it not only causes a lot of waste of sulfur hexafluoride (sulfur hexafluoride is expensive), but also causes environmental pollution (sulfur hexafluoride is extremely harmful to the human body)

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