Low-temperature valve and production line thereof

Abstract

The invention discloses a low-temperature valve which comprises a valve body, an opening and closing piece, a valve seat, a valve rod, a long-neck valve cover and a filler pressing sleeve. The valve seat is installed in the valve body, the opening and closing piece is installed in the valve seat and is in transmission connection with the lower end of the valve rod, and the valve rod is integrally and rotatably inserted in the long-neck valve cover; the valve body is provided with a valve rod mounting seat which is integrally of an upward-convex cylindrical structure, and the lower end of the long-neck valve cover is coaxially and fixedly mounted at the valve rod mounting seat; the top of the long-neck valve cover is fixedly provided with a packing pressing sleeve, the packing pressing sleeve is sleeved outside the upper section of the valve rod, and the inner lower end of the packing pressing sleeve abuts against the packing and the step surface on the valve rod and limits the upper section of the valve rod; the cold insulation valve is characterized in that the length section, located in the long-neck valve cover, of the valve rod is a cold insulation section, the outer side face of the cold insulation section is provided with a cold insulation layer, and the cold insulation layer is carbon aerogel felt. The invention further discloses a low-temperature valve production line. The low-temperature valve and the production line thereof have the advantages of being safe, environmentally friendly and higher in assembly production efficiency.

Description

technical field [0001] The invention belongs to the field of cryogenic valves, in particular to a cryogenic valve and a production line thereof. Background technique [0002] Low temperature industry (such as helium development, hydrogen energy development and storage and transportation, aerospace), large-scale low-temperature refrigeration equipment, low-temperature test benches, low-temperature superconductivity fields, as well as ethylene, liquid oxygen, liquid hydrogen, liquefied natural gas, hydraulic oil products, nuclear power plants. The low temperature medium used is inseparable from the low temperature valve. Because the temperature range of the medium conveyed inside the cryogenic valve is -29 °C to -196 °C, higher requirements are put forward for the durability and reliability of the material of the cryogenic valve and the good sealing performance of the structure. [0003] The technical solution of the publication number CN208900756U in the prior art discloses ...

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Problems solved by technology

[0004] However, the above-mentioned "a low-temperature sleeve regulating valve that is easy to maintain" still has the disadvantage that a cold box is installed outside the valve body and the valve cover, which will not only cause the product to be bulky, but also use pearlite as heat insulation. materials, pearlite is likely to cause certain harm to the human body during use

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