Device for testing toxicity of sulfur hexafluoride gas

Abstract

The invention discloses a device for testing toxicity of sulfur hexafluoride gas. The device comprises a first ventilation pipe, a second ventilation pipe, a gas mixer and a toxicity infecting cylinder, wherein the first ventilation pipe is communicated with the sulfur hexafluoride gas; a first mass flow controller is arranged on the first ventilation pipe; the second ventilation pipe is communicated with an oxygen source; a second mass flow controller is arranged on the second ventilation pipe; a cavity is formed in the gas mixer; the first ventilation pipe and the second ventilation pipe are respectively communicated with the cavity of the gas mixer; the toxicity infecting cylinder is communicated with the cavity through a mixed gas transmission pipe; an exhaust pipe is arranged on the toxicity infecting cylinder and communicated with gas. In the device for testing toxicity of the sulfur hexafluoride gas, the first mass flow controller is capable of accurately controlling flow of the sulfur hexafluoride; the second mass flow controller is capable of accurately controlling flow of oxygen; the sulfur hexafluoride gas and the oxygen are mixed and then can flow in the mixed gas transmission pipe at stable speed, thus facilitating the achievement of accurate results of toxicity test.

Description

technical field [0001] The invention relates to the technical field of machinery industry, and more specifically, relates to a toxicity test device for sulfur hexafluoride gas. Background technique [0002] Sulfur hexafluoride gas has superior electrical properties and is widely used in power systems. Sulfur hexafluoride gas will have some toxic substances remaining during the manufacturing process, and the products produced by the arc action of sulfur hexafluoride gas with toxic substances in the application process are also toxic, so in order to protect the personal safety of users , Sulfur hexafluoride gas needs to be tested with a toxicity test device and in accordance with the "DL / T921-2005 Biological Test Method Standard for Toxicity of Sulfur Hexafluoride Gas" before application to detect whether there are toxic substances remaining in it. [0003] The current toxicity test device for sulfur hexafluoride gas includes a gas mixer, a first ventilation pipe for communic...

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Problems solved by technology

[0004] However, in the above-mentioned toxicity test devices, the structures of each device are not uniform, and the gas flow control is unstable, so it is difficult to ensure that the gas flow into the poisoning tank during the whole test process meets the "DL / T921-2005 Sulfur Hexafluoride Gas Toxicity Biological Test". "method standard" requirements, resulting in poor accuracy of test results

[0005] In addition, when using the above-mentioned toxicity test device, the user needs to observe the activities of the mice 24 hours a day, which is labor-intensive.

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