A deep-sea high-pressure valve stem two-way sealing structure and sealing wear reduction test method

Abstract

The invention relates to a two-way valve rod sealing structure of a deep-sea high pressure valve and a sealing anti-attrition test method. The two-way sealing structure comprises an underwater executing mechanism arranged at one end of the valve; each sealing structure comprises a valve body, an upper valve cover, a valve rod and a valve rod sealing part; the upper valve covers are respectively connected with the valve bodies and the underwater executing mechanism; the valve rod sealing parts are respectively arranged between the upper valve covers and the valve rods; a detection threaded hole is formed in one side of each upper valve cover. According to the structure, the balance pressure in the underwater executing mechanism and the medium pressure in the valve at the two ends of a valve rod sealing device respectively act on two multi-combination sealing pieces arranged along the two opposite directions of the valve rods, and the sealing force is increased along with the increment of pressure, so that two-way pressure sealing for the valve rods can be realized. Lubricating grease is injected into the valve rods through the detection threaded holes formed in the upper valve covers, so that the service lives of the sealing pieces are prolonged, and the flexibility of the action of the valve rods can be improved. The two-way valve rod sealing structure is widely applied to the field of the deep-sea control valve.

Description

technical field [0001] The invention relates to a valve stem sealing structure and a sealing test method, in particular to a deep-sea high-pressure valve stem bidirectional sealing structure and a sealing wear-reducing test method applied in the field of deep-sea control valves. Background technique [0002] With the strategic transfer of my country's oil exploration and development to the ocean, the demand for offshore oil equipment is further increased, and the dependence on foreign technology and equipment is greater. Therefore, whether it is from the perspective of national energy security or the future development of the equipment manufacturing industry Therefore, it is imminent to develop drilling and production equipment suitable for my country's oil and gas exploration and development. [0003] Underwater valve devices and equipment have been monopolized by foreign companies for a long time, and domestic investment and research in this area are lacking. In recent year...

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Problems solved by technology

[0003] Underwater valve devices and equipment have been monopolized by foreign companies for a long time, and domestic investment and research in this area are lacking. In recent years, some enterprises in my country have carried out research on special technologies and products for offshore oil underwater equipment, and have made great progress; However, there are few domestic enterprises or institutions that conduct systematic and comprehensive research on underwater valve devices.

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