Leak-tightness anti-corrosion stop valve

Abstract

The invention discloses a leak-tightness anti-corrosion stop valve. The leak-tightness anti-corrosion stop valve comprises a valve body coated with an anti-corrosion material, a valve deck, a valve clack and a valve rod, wherein a 65-75-degree conical surface is machined at the end of the valve clack, and a conical surface sealing face matched with the conical surface at the end of the valve clack is arranged in an inner cavity of the valve body; a plurality of inner holes are evenly distributed on the plane of the end of the valve clack, and the opening end of each inner hole is chamfered; dovetail grooves are evenly distributed on the conical surface of the end of the valve clack, the inner cavity of the valve body and the surface of the valve rod and filled with the anti-corrosion material, so that an anti-corrosion material layer and a metal base body are integrated, and the anti-corrosion material is polytetrafluoroethylene resin. The sealing structure is reasonable, damage to the sealing face does not occur easily even under the special working condition that a medium contains particular impurities, safety and reliability are realized, and the requirement for long-term conveyance of highly corrosive media such as wet chlorine can be met. Furthermore, the leak-tightness anti-corrosion stop valve has a filtering function, and a valve element can not be damaged easily.

Description

technical field [0001] The invention relates to a valve, in particular to a non-leakage corrosion-resistant cut-off valve. Background technique [0002] At present, known ordinary valves are composed of main parts such as valve body, valve cover, valve disc, valve stem, nut, etc., and the materials of each part are generally not corrosion-resistant. Once this kind of ordinary valve is used to transport strong corrosive and toxic media such as chlor-alkali, the part in contact with the media is very easy to corrode and leak. Thereby endangering the surrounding environment and personal safety. [0003] In recent years, according to the special requirements for the transportation of toxic and easily leaking media, and in view of some defects in the use of existing valves, many technical solutions for chlorine gas special valves to prevent chlorine gas leakage have been published in the current technology. Among them, on April 30, 1998, Nantong Suzhong Chemical Valve Factory a...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect that the existing wet chlorine valve adopts a flat sealing structure and the sealing surface is easily damaged and leaks under special working conditions, the present invention provides a non-leakage corrosion-resistant stop valve, which can not only meet the requirements of strong corrosive media such as wet chlorine for a long time In addition, it is not easy to damage the sealing surface under special working conditions such as medium containing particles and impurities, and the use is safer and more reliable; at the same time, the invention also has a filtering function to protect the filter element

Images