Detachable chlor-alkali special valve having leakage preventing device

Abstract

The invention discloses a detachable chlor-alkali special valve having a leakage preventing device. The special valve is characterized by comprising a special valve body, the leakage preventing device and a control device, wherein the special valve body comprises a valve part, a valve base and a valve body; the valve body is fixedly connected with the leakage preventing device; the control device comprises a valve rod; the leakage preventing device comprises a gland, an upper valve cover, a lower valve cover and a corrugated pipe inserted through by the valve rod in sequence; the upper and lower valve covers are fixedly connected; the gland is positioned at the upper end of the upper valve cover; a sealing filler is arranged in a filler cavity defined by the gland, the upper valve cover and the valve rod; the upper end of the corrugated pipe is pressed and fixed by the upper and lower valve covers; and the lower end of the corrugated pipe is fixedly connected with a flange fixedly connected to the valve rod. As the valve rod is welded with the flange, the reshaping is convenient; the lower end of the corrugated pipe is welded on the flange, so that the valve rod is not liable to deform; and the upper end of the corrugated pipe is pressed and fixed through the upper and lower valve covers, so that a traditional welding structure is broken through, the disassembly among parts is easy, and the cleaning, the checking and the maintenance are convenient.

Description

technical field [0001] The invention relates to the technical field of regulating valves and cut-off valves, in particular to a detachable special valve for chlor-alkali with an anti-leakage device. Background technique [0002] At present, chlor-alkali special valves are indispensable components for controlling the flow of toxic, harmful and strongly corrosive media in chemical equipment and pipelines of chlor-alkali chemical enterprises in the chemical industry. In recent years, the chlor-alkali chemical industry has developed rapidly, and the existing chlor-alkali valves can no longer meet the needs of the rapid update of the chemical industry. In the prior art, the bonnet of the chlor-alkali special valve is generally welded as a whole, which cannot be disassembled and cleaned, and it is not convenient to replace individual parts if they are broken; the upper end of the bellows in the anti-leakage device is generally welded on the lower bonnet, and the The lower end is ...

AI Technical Summary

Problems solved by technology

In recent years, the chlor-alkali chemical industry has developed rapidly, and the existing chlor-alkali valves can no longer meet the needs of the rapid update of the chemical industry.

In the prior art, the bonnet of the chlor-alkali special valve is generally welded as a whole, which cannot be disassembled and cleaned, and it is inconvenient to replace individual parts if they are broken; the upper end of the bellows in the anti-leakage device is generally welded on the lower bonnet, and The lower end is directly welded on the valve stem, which can easily lead to deformation of the valve stem, resulting in leakage of toxic and harmful substances

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