Self-operated ship side valve with power-off protection function and use method thereof

Abstract

The invention relates to a self-operated ship side valve with a power-off protection function and a using method thereof. The self-operated ship side valve comprises a lower valve seat provided with a first circulation opening and a second circulation opening, a main valve rod is installed in an upper valve seat and penetrates downwards to the lower valve seat, the main valve rod right faces the first circulation opening, and a valve deck is assembled at an opening in the upper portion of the upper valve seat; the self-operated ship side valve further comprises a pilot valve, wherein the pilot valve comprises an on-off valve I and an on-off valve II which are oppositely arranged at an interval up and down, the on-off states of the on-off valve I and the on-off valve II are opposite, a push rod is mounted between the on-off valve I and the on-off valve II, and the push rod pushes the on-off valve I upwards or pushes the on-off valve II downwards to realize switching of the on-off states of the on-off valve I and the on-off valve II; and when power is cut off, the push rod moves downwards to push the the on-off valve II to be opened, high-pressure seawater at the first circulation opening flows to the position between the top of the main valve rod of the ship side valve and the valve deck through a second drainage pipe, the on-off valve II and a first drainage pipe, the main valve rod is pushed to move downwards till the first circulation opening is closed by the main valve rod from top to bottom, the ship side valve is switched to be in the closed state, and therefore, the power-off self-protection of the ship side valve is realized through the arrangement of the pilot valve.

Description

technical field [0001] The invention relates to the technical field of side valves for underwater platforms, in particular to a self-operated side valve with a power-off protection function and a method for using the same. Background technique [0002] The underwater platform can carry out tasks such as marine scientific research, marine resource exploration and exploitation, marine observation network construction, operation and maintenance underwater for a long period of time and all-weather, and will become an important equipment for deep sea exploration and development. [0003] In order to ensure that the many heating devices on the underwater platform are in good working condition, it is necessary to cool multiple types of equipment such as power systems, air-conditioning cabinets, and comprehensive purification devices for harmful gases. In order to meet the cooling water demand of the cooling system, it is necessary to introduce seawater from the outboard into the ca...

AI Technical Summary

Problems solved by technology

[0006] 1) The existing side valves are generally driven by manual, hydraulic or electric operation. Due to the high pressure of seawater, if purely manual operation is used, the requirements for operators are high, and in the event of damage to the seawater pipeline in the cabin, the valve The surrounding may be in a state of water and fog, the environment is harsh, and the operation is difficult;

[0007] 2) The side valve adopts hydraulic or electric. In order to overcome the high pressure of seawater on the actuator, it is necessary to ensure the stability and reliability of the power source. It is necessary to install hydraulic pipelines, cables and other equipment, and the volume of the hydraulic or electric actuator is relatively large. Occupy the space in the cabin and increase the complexity of the system;

[0008] 3) In the event of a water ingress accident in the cabin, additional accidents such as power loss such as electricity and hydraulic pressure may often occur. Once the power source is lost, the hydraulic or electric side valve will not be able to close, resulting in serious accidents

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