Ultrahigh pressure flat plate gate valve

Abstract

The invention discloses an ultrahigh pressure flat plate gate valve. The ultrahigh pressure flat plate gate valve is an inside screw non-rising stem type gate valve. A hand wheel is turned to drive a valve stem bush and a thrust bearing to rotate, and then a valve stem is driven to rotate through a safety pin, so that a valve plate moves up and down to fulfill the aim of opening and closing the valve; dual seal design of metal seal and spring type lip seal is adopted between a valve seat and a valve body, so that particulate pollutants are protected from invading a valve cavity to the greatest extent, the metal seal among the valve body, the valve seat and the valve plate is prevented from being corroded by grains of sand, and drilling mud can also be prevented from corroding the valve body; and the valve body and a valve cover are forged by high-grade alloy structural steel or high-grade stainless steel and a special thermal treatment technology is also adopted, so that the valve body and the valve cover have high mechanical property, and the reliability and the safety are improved. The ultrahigh pressure flat plate gate valve has the advantages of compact structure, high valve rigidity, smooth passage, low flow resistance, corrosion resistance, wear resistance, erosion resistance, long service life, wide application range and the like, and a sealing surface is made of stainless steel and hard alloy.

Description

technical field [0001] The invention relates to an ultra-high pressure flat gate valve. Background technique [0002] For many years, the flat gate valves produced in the market are mostly limited to the pressure levels: 35MPa, 70MPa, 105MPa, but as the exploitation environment of oil and gas fields becomes more and more harsh and complex, the provision of flat gate valves suitable for "ultra-high pressure, high corrosion" conditions has been imminent. SUMMARY OF THE INVENTION [0003] The ultra-high pressure flat gate valve provided by the invention has good mechanical properties and sealing properties, is widely suitable for various pressure, temperature and corrosion conditions, and is especially suitable for ultra-high pressure and high corrosion conditions. [0004] In order to achieve the above purpose, the present invention provides an ultra-high pressure flat gate valve, comprising: [0005] valve body; [0006] The guide plate is arranged in the inner cavity of...

AI Technical Summary

Problems solved by technology

[0002] For many years, most of the slab gate valves produced on the market are limited to pressure levels of 35MPa, 70MPa, and 105MPa. However, as the mining environment of oil and gas fields becomes more and more harsh and complex, it is necessary to provide slab gate valves suitable for "ultra-high pressure and high corrosion" working conditions. imminent

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