Strong corrosion resistant special fluoroplastic full-lining diaphragm valve

Abstract

The invention discloses a strong corrosion resistant special fluoroplastic full-lining diaphragm valve, and relates to the field of manufacturing of valves. The strong corrosion resistant special fluoroplastic full-lining diaphragm valve comprises a valve body, a valve cover, a valve rod, a diaphragm pad, a diaphragm sheet, a pressing block, a transmission nut, a fluoroplastic anticorrosion layerand a hand wheel; the pressing block is connected to the inner end of the valve rod, the diaphragm pad is connected to the lower surface of the pressing block, the diaphragm sheet is connected to thelower surface of the diaphragm pad, and the valve cover, the edge of the diaphragm pad, the edge of the diaphragm sheet and the valve body are connected through bolts; the pressing block, the diaphragm pad and the diaphragm sheet are connected through a bolt with a special-shaped head, the bolt with the special-shaped head comprises a screw rod and the head, and a plurality of arc-shaped protrusions are integrally arranged on the periphery of the head of the bolt with the special-shaped head; and a counter bore is formed in the diaphragm pad, the head of the bolt with the special-shaped head is arranged in the counter bore of the diaphragm pad, a through hole is formed in the head of the bolt with the special-shaped head, and fluoroplastics are separately arranged in the counter bore of the diaphragm pad and in the through hole of the bolt with the special-head head and are integrated with the diaphragm sheet. The strong corrosion resistant special fluoroplastic full-lining diaphragm valve is safe and reliable.

Description

technical field [0001] The invention relates to the field of valve manufacturing, in particular to the technical field of manufacturing a cut-off diaphragm valve used on strong acid and strong alkali pipelines. Background technique [0002] At present, my country's chemical industry is used for chlorine gas, chlorine water, hydrogen chloride, refined brine, high-purity hydrochloric acid, sulfuric acid, phosphoric acid, hydrofluoric acid, aqua regia, lye and other highly corrosive and oxidizing medium pipelines to control medium flow valves It is an ordinary lined valve. Because it does not have special characteristics in material selection or valve structure, on the one hand, the performance of this valve is unstable and the sealing effect is not good; on the other hand, it is resistant to corrosive, toxic and harmful process conditions Poor corrosion performance, easy to leak, easy to fall off the lining layer, easy to perforate the shell base, and damage to the lining layer ...

AI Technical Summary

Problems solved by technology

[0002] At present, my country's chemical industry is used for chlorine gas, chlorine water, hydrogen chloride, refined brine, high-purity hydrochloric acid, sulfuric acid, phosphoric acid, hydrofluoric acid, aqua regia, lye and other highly corrosive and oxidizing medium pipelines to control medium flow valves It is an ordinary lined valve. Because it does not have special characteristics in material selection or valve structure, on the one hand, the performance of this valve is unstable and the sealing effect is not good; on the other hand, it is resistant to corrosive, toxic and harmful process conditions Poor corrosion performance, easy to leak, easy to fall off the lining layer, easy to perforate the shell base, and damage to the lining layer will lead to a short service life of the valve as a whole, which cannot meet the special requirements for long-term effective transmission of media. Once the toxic medium leaks, it will damage the surrounding environment and Great danger to personal safety

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