Seawater main pipe plugging device and plugging method thereof

Abstract

The invention discloses a seawater main pipe plugging device and a plugging method thereof. Through the cooperation of an expansion device, a pressure rod assembly and a sealing assembly, a seawater main pipe orifice connected on the side wall of a seawater tank is plugged, so that all water in a pipeline and a valve is completely discharged, the problems that the valve is damaged due to the factthat the water is not completely discharged and ices and expands are effectively avoided, the potential safety hazard is greatly reduced, the ship upper discharge maintenance is reduced, and the shipmaintenance cost is reduced.

Description

technical field [0001] The invention relates to a sealing device for a seawater main pipe on a ship and a sealing method thereof. Background technique [0002] In high latitude areas, the temperature in winter is low, up to -40°C, and the ice layer on the water surface is more than 0.5m thick. Ships sailing in this area need to drain the oil and water in the cabins and pipelines to prevent ice expansion from causing damage. Compartments, pipelines and accessories were damaged. [0003] In view of the above problems, the damage can be reduced by closing the gate valve on the seawater main pipe and releasing the pipeline water, but the water from the valve core of the gate valve to the cavity 101 on the side of the seawater tank cannot be discharged, such as figure 1 As shown, when encountering a low temperature environment, the water there will expand during the freezing process, resulting in deformation of the valve core or rupture of the valve body. The gate valve needs t...

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Problems solved by technology

[0003] In view of the above problems, the damage can be reduced by closing the gate valve on the seawater main pipe and releasing the pipeline water, but the water from the valve core of the gate valve to the cavity 101 on the side of the seawater tank cannot be discharged, such as figure 1 As shown, when encountering a low temperature environment, the water there will expand during the freezing process, resulting in deformation of the valve core or rupture of the valve body

The gate valve needs to be replaced if the valve core is deformed; after the valve body breaks, water will enter the engine room, which will eventually cause the ship to be re-uplifted for maintenance, posing a major safety hazard; at this stage, in order to reduce damage, it is usually better to use cast steel and other materials in the industry The gate valve is used as a sea valve, but it cannot avoid damage

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