Chlorine forged steel stop valve

Abstract

The invention discloses a chlorine forged steel stop valve. The chlorine forged steel stop valve comprises a forged steel valve body. An inlet channel and an outlet channel are formed in the lower endof the forged steel valve body. A forged steel valve deck is arranged at the upper end of the forged steel valve body. A valve rod is arranged inside the valve body. The upper end of the valve rod isconnected with a hand wheel assembly, and the lower end of the valve rod is connected with a valve clack assembly. Sealing filler and a pressing plate are arranged between the valve rod and the forged steel valve deck. The hand wheel assembly comprises a dustproof 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 dustproof cap is arranged above the hand wheel and further connected with the valve rod nut through a thread. The support flange and the valve rod nut are in axial rotating fit. The support flange is connected with the forged steel valve deck through a stand column. The valve clack assembly comprises a small valve clack and a large valve clack, and the diameter of the small valve clackis smaller than that of the large valve clack. A limiting slip cavity is formed in the large valve clack.

Description

Technical field [0001] The invention relates to a valve, in particular to a chlorine forged steel stop valve. Background technique [0002] Chlorine stop valve is a common valve used in the chemical industry to control and regulate strong corrosive flowing media such as chlorine. The existing chlorine cutoff mainly includes: a valve body, an inlet channel and an outlet channel are provided at the lower end of the valve body, a valve cover is provided at the upper end of the valve body, and a valve stem is provided in the valve body. The upper end of the valve stem is connected to the handwheel assembly, and the lower end of the valve stem is connected to the disc assembly. A packing and pressure plate are arranged between the valve stem and the cast steel bonnet. A bellows is sleeved on the outer side of the lower section of the valve stem. One end of the bellows is welded to the cast steel valve cover, and the other end of the bellows is welded to the valve stem. The existing ...

AI Technical Summary

Problems solved by technology

The existing chlorine gas stop valve mainly has the following disadvantages: 1. The valve stem and the valve cover are only sealed by sealing packing and a bellows, and the sealing effect is poor; Chlorine gas leaks, and there are potential safety hazards; 3. The existing chlorine gas shut-off valve can only cut off the inlet passage and outlet passage once, and the cut-off effect is poor. Once the valve disc or valve seat is damaged, it will not be able to cut off the delivery of chlorine gas in time; When the valve is closed, the valve disc and the valve seat are in hard contact, the wear rate is high, and the service life is short

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