Superhigh-temperature flat gate valve

Abstract

The invention relates to a superhigh-temperature flat gate valve and belongs to the technical field of flat gate valves. The superhigh-temperature flat gate valve is simple and compact in structure, small in size, light in weight, evenly in stress on sealing faces of gate plates when the valve is closed and reliable in sealing. The technical scheme is that a valve body is arranged between an upper valve cover and a lower valve cover, the valve body is fixedly connected with the upper valve cover and the lower valve cover, and a gate plate assembly and a gate plate fixing frame are arranged in the valve body. The gate plate assembly comprises an inner gate plate and an outer gate plate, wherein the inner gate plate is movably arranged in the outer gate plate, the outer gate plate is fixedly arranged on the gate plate fixing frame, and a steel ball is arranged in the inner gate plate. The superhigh-temperature flat gate valve can be widely applied to natural gas conveying pipelines, petroleum conveying pipelines, chemical industry conveying pipelines, urban pipelines, gas pipelines, blowdown systems and gas storage devices to serve as starting and stopping equipment.

Description

technical field [0001] The ultra-high temperature flat gate valve of the invention belongs to the technical field of flat gate valves. Background technique [0002] The ultra-high temperature slab gate valve is a sliding valve whose closing part is a parallel gate. At present, it is mainly used for the transmission pipelines of natural gas, petroleum, chemical industry, urban pipelines, etc., and the device of the venting system is used as an opening and closing device. [0003] The existing gate valve has a simple structure and unreasonable design. During the closing process of the valve, the gate will produce water level translation, which will cause uneven force on the cover of the gate, and cannot ensure that the two gates are in place at the same time. The seal is not reliable and the sealing performance is poor. Not good, the ability to withstand high temperature is poor, which seriously affects the service life of the valve, and the processing is complicated, the cost...

AI Technical Summary

Problems solved by technology

[0003] The existing gate valve has a simple structure and unreasonable design. During the closing process of the valve, the gate will produce water level translation, which will cause uneven force on the cover of the gate, and cannot ensure that the two gates are in place at the same time. The seal is not reliable and the sealing performance is poor. Not good, the ability to withstand high temperature is poor, which seriously affects the service life of the valve, and the processing is complicated, the cost is high, the opening and closing time of the valve is long, and the relative friction between the sealing surfaces during opening and closing is easy to cause scratches

Images