Leakproofness detection method for drain plug of ship bottom in ship construction

A technology for draining plugs and ship bottoms, applied in directions such as detecting the presence of fluid at the leak point, using liquid/vacuum for liquid tightness measurement, etc., can solve difficulties, poor structural integrity of the cabin, and pressure that cannot meet the requirements of the draining plug Actual pressure and other issues, to achieve the effect of reducing construction costs, saving construction time, and testing results are true and reliable

Inactive Publication Date: 2015-10-21
HUDONG ZHONGHUA SHIPBUILDINGGROUP
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Problems solved by technology

There are two problems with this method: First, the structural integrity of the cabin in the dock stage is poor, and it is difficult to inflate the cabin. Usually, the cabin inflation is completed at the dock stage
Second, the pressure value required by the classification society for cabin inflation is 0.015Mpa~0.02Mpa. Usually, the draft of such sh

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  • Leakproofness detection method for drain plug of ship bottom in ship construction
  • Leakproofness detection method for drain plug of ship bottom in ship construction
  • Leakproofness detection method for drain plug of ship bottom in ship construction

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Embodiment Construction

[0032] A method for detecting the tightness of ship bilge discharge in shipbuilding according to the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention cannot be limited by this.

[0033] The invention is a method for detecting the tightness of the ship's bottom drain plug in shipbuilding. The method adopts a new idea and operation process to detect the tightness of the ship's bottom drain plug, which has a safe and efficient detection effect, and The operation is simple and does not damage the hull.

[0034] We first take three typical states of ballast water in the ship's ballast tank to analyze the pressure on the bottom drain plug, and take the maximum pressure under these three states as the test pressure.

[0035] figure 1 is an analysis diagram of the pressure on the discharge plug at the bottom of the ship when the ballast tank is fully lo...

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Abstract

The invention relates to a leakproofness detection method for a drain plug of a ship bottom in the ship construction. The method comprises steps of firstly determining test pressure for leakproofness detection of the drain plug; covering the drain plug of the ship bottom with a special detection device by means of a lifting-up device; injecting compressed air in the special detection device so as to reach the abovementioned test pressure; and spraying a soap liquid at one side of the internal of a drain plug ship body. According to the invention, under a precondition that the paint of a ship body is not destroyed, the leakproofness condition of the drain plug of the ship bottom can be rapidly detected, secondary docking of the ship is prevented, and the ship construction period is ensured.

Description

technical field [0001] The invention relates to ship construction, in particular to a method for detecting the tightness of ship bottom discharge, and can be applied to other places where tightness detection is required. Background technique [0002] Normally, the tightness of the hull drain plug itself has been tested after production, and has been approved by relevant agencies. During the ship construction process, it only needs to be welded with the hull structure, and then the weld between it and the outer plate is tested. That's it. The welding seam between the drain plug and the shell plate is vacuumized, and the test pressure is -0.02MPa~-0.026MPa. However, the tightness of the purchased drain plug cannot be guaranteed. If the ship finds that the drain plug leaks during the trial voyage, it needs to be docked again for replacement, and the replacement drain plug should be tested for tightness. The second docking of the ship not only affects the ship construction cyc...

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Application Information

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IPC IPC(8): G01M3/12
Inventor 万莉丁岩瞿雪刚
Owner HUDONG ZHONGHUA SHIPBUILDINGGROUP
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