CN101726395A

CN101726395A - Method for testing tightness of welding lines

Info

Publication number: CN101726395A
Application number: CN200910155511A
Authority: CN
Inventors: 吴小明; 祝波; 金涛
Original assignee: ZHEJIANG YANGFAN GROUP CO Ltd
Current assignee: ZHEJIANG YANGFAN GROUP CO Ltd
Priority date: 2009-12-17
Filing date: 2009-12-17
Publication date: 2010-06-09
Anticipated expiration: 2029-12-17
Also published as: CN101726395B

Abstract

The invention provides a method for testing tightness of welding lines, comprising the steps as follows: selecting a transparent vacuum box which is communicated with a vacuumizer through a pipeline and is provided with a vacuumatic pressure gauge capable of displaying the vacuum degree in the vacuum box; selecting a welding line required to be tested, cleaning the areas respectively about 20mm away from the welding line required to be tested at the right side and at the left side, coating soap solution on the areas, and covering the vacuum box on the welding line coated with the soap solution; compressing the vacuum box, opening the vacuumizer valve, observing whether bubbles belch out of the surface of the welding line or not when the vacuum degree displayed on the vacuumatic pressure gauge is in the range of 0.015-0.02MPa; if so, determining the welding line to be unqualified and rechecking after repair; and if not, determining the welding line to be qualified. The invention has the advantages of reducing workload of tightness test for docks, effectively shortening the production cycle of slipways, optimizing tight working environment, enabling high altitude sealing working to be operated on flat ground, and leading the operation to be more safe; the test method is simple and reliable, namely the test is accurate, the operation is convenient, and the tightness working efficiency is improved effectively.

Description

The method of testing of tightness of welding lines

Technical field

The present invention relates to a kind of method of testing that is used for the tightness of welding lines on the shipbuilding deck of boat.

Background technology

As everyone knows, in the shipbuilding process, for preventing mutual seepage between the various cabins, in Ship Structure, be provided with the watertight compartment wallboard, check whether seepage of these bulkhead plate, then undertaken by close property testing, traditional close property sessions is to be placed on the building berth or in the dock, carry out the close property in big cabin after equal segments is closed up again, and needs are carried out the weld seam of close property, must paste width with adhesive tape in welded joints before the segmentation application be about 100mm, after treating the end of close property, touch-up paint work is carried out in application again, and must will polish in the scope of weld seam both sides (150mm) before the touch-up paint, brushes by hand then., effort not only time-consuming with regard to this operation increased the danger of work high above the ground and closed in space's operation simultaneously, many difficulties are brought in butt welded seam quality control aspect, the most important thing is to prolong the duty cycle in building berth or the dock, thereby reduction production efficiency, so this method of testing awaits to improve.

Summary of the invention

Technical matters to be solved by this invention is that the present situation at prior art provides a kind of method of testing of testing the high tightness of welding lines of accurate, easy to operate, safety and detection efficiency.

The present invention solves the problems of the technologies described above and the technical scheme that adopts is: the method for testing of this tightness of welding lines, it is characterized in that: comprise the steps: a, choose transparent vacuum tank, this vacuum tank is connected with evacuator by pipeline, and vacuum tank is provided with the pressure vacuum gauge that can show vacuum tightness in the vacuum tank; B, choose the weld seam that need to detect, and each 200mm zone is cleaned out about the detected weld seam of needs, coats liquid soap then, vacuum tank is covered on the weld seam that scribbles liquid soap again; C, compress vacuum tank, open and vacuumize valve, whether when showing on the vacuum meter that vacuum tightness is in the 0.015-0.02Mpa scope, observing face of weld has bubble to emerge, and d, has bubble to emerge as finding, determines that weld seam is defective, reexamines after should repairing; There is bubble to emerge as not finding, determines weld is accepted.

As improvement, the weld seam sectional on parts, assembly and lamellar body is tested.

Improve, described method of testing can be applicable to the test of deep penetration welding seam, complete penetraction and fusion in welding fillet weld and the close property of fillet weld again.

Compared with prior art, the invention has the advantages that: at first, meet the characteristics of operation stage reach, reduce the close property testing workload of dock, can improve effectively and shorten building berth (dock) production cycle; Next is, optimize close property operating environment, the high-altitude closed operation can open wide on the level land and do, and make operation safer, and method of testing is simple and reliable, it is accurate, easy to operate promptly to test, improve the work efficiency of close property effectively, also had, can reduce building berth (in the depressed place) framing scaffold work, be reduced to the cost of expense that close property testing is changed, promptly saved production cost; Be once more, can guarantee that segmentation goes out the paint integrality in application workshop, can carry out sand washing paint, reduce building berth, dock touch-up paint workload the weld seam of doing the close property testing of ventilation.In sum, this method of testing has accurate, easy to operate, safety of test and detection efficiency height, is the technology that a kind of valency must be applied, significant.

Embodiment

Below in conjunction with embodiment the present invention is described in further detail.

The method of testing of the tightness of welding lines of present embodiment comprises the steps: a, chooses transparent vacuum tank, and this vacuum tank is connected with evacuator by pipeline, and vacuum tank is provided with the pressure vacuum gauge that can show vacuum tightness in the vacuum tank; B, choose the weld seam that need to detect, and each 200mm zone is cleaned out about the detected weld seam of needs, coats liquid soap then, vacuum tank is covered on the weld seam that scribbles liquid soap again; C, compress vacuum tank, open and vacuumize valve, whether when showing on the vacuum meter that vacuum tightness is in the 0.015-0.02Mpa scope, observing face of weld has bubble to emerge, and d, has bubble to emerge as finding, determines that weld seam is defective, reexamines after should repairing; There is bubble to emerge as not finding, determines weld is accepted.Weld seam sectional on parts, assembly and lamellar body is tested, and is more convenient like this, and this method of testing can be applicable to the test of deep penetration welding seam, complete penetraction and fusion in welding fillet weld and subangle tightness of welding lines, and range of application is wider.

Below the invention will be further described:

One, purpose:

1, looks into the close property of weld seam, guarantee the integrality of segmentation application.

2, low site operation difficulty is improved construction environment.

3, can not implement a kind of additional of the close property testing of fillet weld to deep penetration welding and complete penetraction and fusion in welding fillet weld.

4, reduce building berth (in the depressed place) framing scaffold work, reduce close property testing cost.

5, the card segmentation goes out the paint integrality in application workshop, can carry out sand washing paint to the weld seam of doing the ventilation density test, reduces building berth, dock touch-up paint workload.

Two. scope:

Non-automatic weldering butt-weld, fillet weld etc.

Three. test procedure

The close property testing of vacuum is to fillet weld, and spraying liquid soap in butt-weld (non-automatic weld seam) surface covers detected weld with vacuum tank simultaneously, opens ball valve (vacuum valve), range estimation welding seam leakage situation.

1. for can see the welding seam leakage situation clearly, vacuum tank must be transparent.

2. pressurized air ascending pipe joint and vacuum pressure meter connector are installed on vacuum tank.

3. vacuum test pressure is 0.015～0.02Mpa.

Be examined about weld seam each～the 200mm zone is cleaned out, and is coated liquid soap.Vacuum tank is covered on the weld seam that scribbles liquid soap.

5. compress vacuum tank and open ball valve, observe whether vacuum tightness meets the demands on the vacuum meter.Whether under the prerequisite that satisfies the vacuum tightness requirement, observing face of weld has bubble to emerge, if any: illustrate that weld seam has seepage, should repair the back rechecking; As not having; Illustrate that weld seam does not have seepage.

6. all weld seams that vacuumize inspection all will be reported the QC approval and keep a record.

Four. frock making:

This frock mainly is to be used for body section fillet weld and the test of outside plate tightness of welding lines.With reference to the fillet weld and the outside plate line style of the various angles of body section, concave, convex, flat, and the vacuum tank of the fillet weld of various angles have been made.

Claims

1. the method for testing of a tightness of welding lines, it is characterized in that: comprise the steps: a, choose transparent vacuum tank, this vacuum tank is connected with evacuator by pipeline, and vacuum tank is provided with the pressure vacuum gauge that can show vacuum tightness in the vacuum tank; B, choose the weld seam that need to detect, and each 200mm zone is cleaned out about the detected weld seam of needs, coats liquid soap then, vacuum tank is covered on the weld seam that scribbles liquid soap again; C, compress vacuum tank, open and vacuumize valve, whether when showing on the vacuum meter that vacuum tightness is in the 0.015-0.02Mpa scope, observing face of weld has bubble to emerge, and d, has bubble to emerge as finding, determines that weld seam is defective, reexamines after should repairing; There is bubble to emerge as not finding, determines weld is accepted.

2. according to the method for testing of the described tightness of welding lines of claim 1, it is characterized in that: the weld seam on parts, assembly and lamellar body is that segmentation is tested.

3. according to the method for testing of claim 1 or 2 described tightness of welding lines, it is characterized in that: described method of testing can be applicable to the test of deep penetration welding seam, complete penetraction and fusion in welding fillet weld and the close property of fillet weld.