Chlorine cast steel stop valve

Abstract

The invention discloses a chlorine cast steel stop valve. The chlorine cast steel stop valve comprises a cast steel valve body, an inlet channel and an outlet channel are formed in the lower end of the cast steel valve body, a cast steel valve cover is arranged at the upper end of the cast steel valve body, a valve rod is arranged in the valve body, the upper end of the valve rod is connected witha hand wheel assembly, the lower end of the valve rod is connected with a valve clack assembly, wherein a sealing filling and a pressing plate are arranged between the valve rod and the cast steel valve cover; the hand wheel assembly comprises a dust cap, a hand wheel, a valve rod nut, a support flange and a flat key, the hand wheel is connected with the valve rod nut through the flat key, the dust cap is arranged above the hand wheel and is connected with the valve rod nut through threads, the support flange is in axial rotation fit with the valve rod nut, and the support flange is connectedwith the cast steel valve cover through stand columns; the valve clack assembly comprises a small valve clack and a large valve clack, the diameter of the small valve clack is smaller than that of the large valve clack, and a limiting sliding cavity is formed in the large valve clack.

Description

technical field [0001] The invention relates to a valve, in particular to a chlorine gas cast steel stop valve. Background technique [0002] Chlorine gas stop valve is a commonly used valve in the chemical industry to control and regulate strong corrosive flow media such as chlorine gas. The existing chlorine cut-off mainly includes: a valve body, an inlet channel and an outlet channel are arranged at the lower end of the valve body, a valve cover is arranged at the upper end of the valve body, a valve stem is arranged in the valve body, and the The upper end of the valve stem is connected to the handwheel assembly, the lower end of the valve stem is connected to the disc assembly, a sealing packing and a pressure plate are arranged between the valve stem and the cast steel bonnet, and a bellows is set on the outside of the lower section of the valve stem. One end of the bellows is welded on the cast steel valve cover, and the other end of the bellows is welded on the valv...

AI Technical Summary

Problems solved by technology

The existing chlorine shut-off valve can only be cut off once, and the cut-off effect is poor. Once the valve disc or the valve seat is damaged, it will not be able to cut off the delivery of chlorine gas in time, which has potential safety hazards. At the same time, when the existing valve is closed, the gap between the valve disc and the valve seat Hard contacts between them, high wear rate and short service life

Images