Sealing cap for assisting SF6 gas sampling
A gas sampling and sealing cap technology, applied in sampling, sampling device, measuring device, etc., can solve the problems of complicated operation, reduced sampling efficiency, gas leakage, etc. Effect
Pending Publication Date: 2022-03-08
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
The operation of the whole process is extremely cumbersome, and the joints and sealing caps are constantly assembled and disassembled, which greatly reduces the efficiency of sampling, and the whole process is also prone to gas leakage
Method used
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "top", "bottom", "inner", "outer" etc. are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orie...
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The invention relates to a sealing cap for assisting SF6 gas sampling, which comprises a cap body and a gas connecting pipe, a mounting hole is formed in the cap body in a penetrating manner, a first boss is arranged on the hole wall of the mounting hole, an internal thread is arranged on the hole wall of the mounting hole, a gas valve of GIS equipment is screwed into the mounting hole, and the gas connecting pipe is provided with a first end and a second end which are oppositely arranged. The first end is located in the mounting hole, the second end is located outside the cap body, a circle of second boss is annularly arranged on the outer side wall of the gas connecting pipe, the second boss abuts against the first boss, a vent hole is formed in the gas connecting pipe in a penetrating mode, and an ejector pin used for ejecting the gas valve open is movably arranged in the vent hole and comprises a plugging part and an operation part which are connected. The blocking part has a first position for blocking the vent hole and a second position for opening the blocking part, the blocking part is connected with the elastic piece, the elastic piece always drives the blocking part to move towards the first position, and the operation part is located on the side face, close to the first end, of the blocking part. The sealing cap for assisting SF6 gas sampling can be used for sampling without being disassembled.
Description
technical field [0001] The invention relates to the technical field of GIS equipment sampling, in particular to a sealing cap for assisting SF6 gas sampling. Background technique [0002] SF6 is a strong electronegative gas, its molecules are very easy to absorb free electrons to form large negative ions, which weakens the impact ionization process in the gas, so its electrical insulation strength is very high, about 2.5 times the insulation strength of air in a uniform electric field . Moreover, when the AC arc current crosses zero, SF6 gas has a much stronger cooling effect on the arc than air, and its arc extinguishing ability is about 100 times that of air. In addition, because SF6 gas has excellent arc extinguishing performance, insulation performance and good chemical stability, it has been used as an arc extinguishing medium for high-voltage circuit breakers since the late 1950s. In EHV and UHV circuit breakers, SF6 has replaced oil as an arc extinguishing medium, a...
Claims
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IPC IPC(8): G01N1/22
CPCG01N1/2226
Inventor 刘伟朱炽荣黄伟忠赖俊驹潘映璐刘威冼锋
Owner GUANGDONG POWER GRID CO LTD