Method and device of tightness test for filler weld

A fillet weld and tightness technology, which is applied in the direction of using liquid/vacuum to measure the liquid tightness and detecting the appearance of fluid at the leakage point, etc., can solve the problems of inability to guarantee safe production, slow speed of tightness test, and poor quality and other issues to achieve the effect of shortening the production cycle, ensuring integrity and quality assurance

Inactive Publication Date: 2008-01-09
GUANGZHOU SHIPYARD INTERNATIONAL LTD
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  • Abstract
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Problems solved by technology

This is the time when work on the berth or dock is the most stressful, and all workshops are busy with construction, and there are a lot of three-dimensional operations. At this time, the tightness test is slow, the quality is poor, the cycle is long, and the safety of production cannot be guaranteed.

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  • Method and device of tightness test for filler weld
  • Method and device of tightness test for filler weld
  • Method and device of tightness test for filler weld

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Embodiment Construction

[0036] The present invention is described in detail as follows in conjunction with accompanying drawing:

[0037] The fillet weld airtightness test method and equipment described in the present invention are used for the airtightness inspection of plane sections in modern shipbuilding docks. The oil and water tanks of a part of the hull structure must be tested for tightness after the construction is completed, so as to check the tightness or strength of the welding or structure of this part. According to the construction policy, the segmental closed mouth fillet welds are welded when loading in the dock, and the cabin pressure test is done. The fillet weld tightness test is carried out on segments and segments. When the segments and segments are assembled and welded, the fillet weld tightness test can be carried out after the weld shape inspection is qualified. The fillet weld tightness test involves the hull bottom, side, deck, girder and other sections, accounting for 2 / 3 ...

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Abstract

In 2-3 days after welding, under condition of preparatory work of welding inspection in prophase, the method implements following operations: placing complementary plate; connecting air pipe and wind meter to connection plate; gas filling, when wind meter reaches to 0.2kg / cm2, gas pressure system keeps 20-30 minutes, and when wind meter steps down to 0.15kg / cm2, gas pressure system is closed; painting soapy water on two sides of welding line to carry out inspection, making mark on defect discovered by using chalk; repairing defect and redoing airtight test; welding the hole on the connection plate. Through threaded joint, air pipe with ball valve is fixed on a connection plate; and through threaded joint, the wind meter is installed on the other connection plate. Two pieces of plate are installed on two ends of welding line respectively, and checking hole is opened on external end of the connection plate.

Description

[technical field] [0001] The invention relates to a method and equipment for air tightness testing after welding, more specifically, a method for testing the tightness of fillet welds and an air pressure control testing device specially designed for implementing the method. [technical background] [0002] Post-weld inspection is a comprehensive evaluation of welding quality, especially for products with special performance requirements, it is the key to determine their quality and whether they can be put into use. Weld tightness inspection is one of the important links. Advanced shipbuilding countries such as Japan and South Korea have already applied the air tightness test to the weld tightness test of the post-weld inspection, and achieved beneficial results. In our country, it is still in its infancy and needs to be promoted and studied in depth. [0003] At present, most shipbuilding enterprises in my country, according to the ship design requirements, the hull tightne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/14
Inventor 董大栓翟毅许融明李代进杨宝文
Owner GUANGZHOU SHIPYARD INTERNATIONAL LTD
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