High-pressure connecting rod type bellows globe valve

Abstract

A high-pressure connecting rod type bellows globe valve comprises a valve body, a valve base, a valve deck and a hand wheel. A bellows assembly is arranged inside the valve body and comprises a valve element, a bellows, a bellows welding sleeve, a welding bush and a valve rod. One end of the bellows is connected with the valve rod, and the other end of the bellows is connected with the bellows welding sleeve. A red copper sealing gasket is arranged between the valve body and the bellows welding sleeve. A sealing gasket is arranged between the valve base and the bellows welding sleeve. A filler pressing pad and a filler are sequentially arranged between the valve deck and the valve base. A jacking rod is arranged inside the valve deck. One end of the jacking rod is connected with the valve rod, and the other end of the jacking rod is provided with the hand wheel. The valve rod and the jacking rod are adopted for forming a connecting rod type pull-up device, and meanwhile the valve rod and the jacking rod are protected against corrosion through quadruple sealing of the red copper sealing gasket, the bellows, the sealing gasket and the filler; and assembly and replacement are more convenient, and sealing performance, high temperature resistance, high pressure resistance and corrosion resistance are better.

Description

technical field [0001] The invention relates to the technical field of stop valves, in particular to a high-pressure connecting rod bellows stop valve. Background technique [0002] The bellows globe valve adopts a bellows structure inside, and the stainless steel bellows is welded at the lower end of the valve stem to prevent the process fluid from eroding the valve stem, and the other end of the valve stem is placed between the valve body and the bonnet to form a static seal. [0003] The current bellows globe valve is basically the bellows assembly and the valve body are sealed by pressing the sealing gasket on the top end of the valve body, and the current bellows globe valve in my country has a single structure, which can only be used in low pressure, low temperature and safe medium. Under working conditions, and the service life is short, it is not suitable for pipelines and places with high temperature, high pressure and danger or that may cause harm to the environmen...

AI Technical Summary

Problems solved by technology

[0003] The current bellows globe valve is basically the bellows assembly and the valve body are sealed by pressing the sealing gasket on the top end of the valve body, and the current bellows globe valve in my country has a single structure, which can only be used in low pressure, low temperature and safe medium. Under working conditions, and the service life is short, it is not suitable for high temperature, high pressure and dangerous pipelines and places that may cause harm to the environment and human life

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