A deep-sea valve actuator with a bidirectional pressure dynamic balance compensation device

Abstract

The invention relates to a deep sea valve executing mechanism with a bidirectional pressure dynamic balance compensation device. The deep sea valve executing mechanism comprises an executing mechanism, a piston type pressure balance compensator and a valve connecting component, wherein the piston type pressure balance compensator is positioned at the outer side of the executing mechanism and is connected with the executing mechanism; the executing mechanism is connected with an underwater valve through the valve connecting component; the executing mechanism comprises an executing mechanism shell, a hydraulic cylinder end cover, a piston rod, a transmission shaft sleeve, a spring seat and a plurality of springs; the piston type pressure balance compensator comprises a pressure balancer shell; one side of the pressure balancer shell is provided with a filter end cover; the other side of the pressure balancer shell is connected with the executing mechanism through a connecting shaft; a piston is arranged in the pressure balancer shell; the pressure balancer shell is divided into a dynamic balance cavity and a seawater compensation cavity by the piston. According to the deep sea valve executing mechanism disclosed by the invention, inner and outer pressure and working volume of the executing mechanism of the underwater valve can be effectively balanced and compensated, the structure is simple, the cost is low, and the deep sea valve executing mechanism can be widely applied to the field of deep sea valve control.

Description

technical field [0001] The invention relates to a deep-sea valve actuator, in particular to a deep-sea valve actuator with a bidirectional pressure dynamic balance compensation device. Background technique [0002] my country's offshore oil and gas exploration and development started late, lacking key technologies and equipment for offshore oil underwater equipment with independent intellectual property rights, and basically relying on imports. 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] The underwater valve device technolo...

AI Technical Summary

Problems solved by technology

[0006] For valve actuators used in deep sea, the pressure control chamber is not only subjected to the operating hydraulic pressure, but also the shell of the actuator is also subjected to external water depth pressure; if the non-pressure control chamber inside the actuator does not adopt pressure balance compensation, Then, when the non-controlling chamber inside the actuator acts with the working pressure, it will generate a certain reactionary back pressure due to the sealing of the inner chamber, preventing the actuator from moving; at the same time, the shell will bear the unilateral pressure from the external water depth , resulting in inconsistent internal and external pressure, which tends to crush the shell. In order to ensure the safety of the shell, it is necessary to increase the wall thickness of the shell, resulting in an increase in overall size and weight, and increasing manufacturing costs.

[0007] In order to achieve pressure balance compensation, the deep-sea valve actuator is simply like the actuator on land, and the internal chamber is connected with the external seawater with a diversion (pressure) hole, and the seawater is directly introduced into the internal chamber of the actuator. Achieve internal and external pressure balance and compensation, but seawater will cause corrosion to internal parts, seriously affecting product performance and life; in order to achieve internal and external pressure balance and effective volume compensation of the actuator, improve product performance and life, reduce overall size and weight , it is necessary to conduct necessary research on this functional structure

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