Underwater hydraulic driven type flat plate gate valve

Abstract

The invention discloses an underwater hydraulic driven type flat plate gate valve, wherein a flow passage is arranged in a valve body; the middle part of the flow passage is provided with a valve seat; a valve plate is arranged in the middle of the valve seat and is provided with a valve plate passage; the valve body is connected with one end of a valve cover; the other end of the valve cover is coaxially connected with a spring cavity shell, a hydraulic cylinder shell and a casing in sequence; a valve rod is arranged in an inner cavity of the spring cavity shell and penetrates through the valve cover to be connected with the valve plate; a limiting cylinder and a spring pressing plate are fixedly sleeved on the valve rod; the bottom end of the spring cavity shell at one end of a sealing pressing cap is provided with a limiting plate; a spring is arranged between the limiting plate and the spring pressing plate; one end of a piston in the inner cavity of the hydraulic cylinder shell is butted against the spring pressing plate, and the other end of the piston is fixedly connected with a super control rod; a pressure relief port is formed on an axis hole of the valve cover; the spring cavity shell is provided with a pressure compensation port; and the hydraulic cylinder shell is provided with a hydraulic inlet and outlet. The device has the advantages of simple structure, good sealing property, high reliability, automatic closing in case of failure and ROV (Remote Operated Vehicle) standby control function.

Description

technical field [0001] The invention belongs to the technical field of oil and gas drilling equipment, and relates to an underwater hydraulically driven flat gate valve. Background technique [0002] Slab gate valve is a commonly used cut-off valve, which has small flow resistance, reliable sealing and long service life, and is widely used in gas and liquid medium pipeline systems, especially in offshore oil and gas exploration and development, underwater slab gate valves are widely used in underwater In the oil and gas production system, such as: underwater oil Christmas trees, underwater gathering and transportation manifolds, ocean pipelines, etc.; in deep water oil and gas production, because the production equipment cannot be directly operated, only the underwater production control system or ROV (underwater Therefore, the flat gate valve with underwater remote control function is an important part of the underwater oil and gas production system. [0003] The existing ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an underwater hydraulically driven slab gate valve, which solves the problems in the prior art that the structural design and manufacture of the underwater slab gate valve are relatively complicated and the control reliability is not high enough

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