CN109297644A - A kind of close property detection method for 90 ° of fillet welds at LNG ship CM node - Google Patents
A kind of close property detection method for 90 ° of fillet welds at LNG ship CM node Download PDFInfo
- Publication number
- CN109297644A CN109297644A CN201811286670.9A CN201811286670A CN109297644A CN 109297644 A CN109297644 A CN 109297644A CN 201811286670 A CN201811286670 A CN 201811286670A CN 109297644 A CN109297644 A CN 109297644A
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- sealing plate
- plate
- close property
- lng ship
- detection method
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- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 100
- 230000001413 cellular effect Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000013461 design Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 230000002950 deficient Effects 0.000 claims abstract description 3
- 238000005286 illumination Methods 0.000 claims abstract description 3
- 239000000344 soap Substances 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims abstract description 3
- 239000003292 glue Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 7
- 230000013011 mating Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 4
- 241000628997 Flos Species 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 241001484259 Lacuna Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/145—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for welds
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to a kind of close property detection methods for 90 ° of fillet welds at LNG ship CM node, this method carries out close property detection by special detection device, it include panel, sealing plate, coaming plate, cellular rubber and connector on the vacuum apparatus designs, this method comprises: when close property is examined, after vacuum plant is ready to, to CM node at 45° angle weld seam spray liquid soap, vacuum plant is covered into weld seam, pass through fine position itself and compress cellular rubber, forms sealing space；Breather valve is adjusted, when pressure gauge reaches defined pressure value, by torch for illumination, directly detecting weld seam has bubble-free to emerge, and reaches tightness of welding lines testing goal；Breather valve is closed after detection；If it is defective to detect weld seam, above three step is repeated after to be repaired, if weld seam is intact, detection terminates.Method and vacuum plant of the invention can overcome the undetectable difficulty of conventional vacuum cover herein during tightness test, improve LNG ship cargo tank efficiency of construction.
Description
Technical field
The present invention relates to shipbuildings, especially relate to a kind of for 90 ° of fillet weld sealings at CM node in LNG ship construction
Property detection method and dedicated vacuum checking device.
Background technique
In LNG ship oceangoing ship building course, there is CM node identical compared with multi-angle in liquid freight house, after the completion of sectional construction, need
Close property detection is carried out to fillet weld at node, since structure type is more special at CM node, platform board is formed with longitudinal wall plate
Fillet weld be 90 °, and formed fillet weld platform board end only have 30mm, due to liquid freight house installation maintenance system time-consuming compared with
It is long, therefore tightness of welding lines testing requirements are completed in segmentation, block stage, and be suitble to detect the method for this tightness of welding lines in this stage
Only vacuumize test.
According to experimental rig is vacuumized commonly used by current technology, it can only generally meet two for being formed by fillet weld
Structural plane threshold value weld seam has the detection of the weld seam of biggish distance, at LNG ship herein CM node, due to weld pitch
Too close from platform end, Ordinary vacuum cover can not detect 90 ° of tightness of welding lines at this.
Summary of the invention
It is an object of the invention to overcome above-mentioned the shortcomings of the prior art, a kind of new characterization processes and special are provided
The ship tightness of welding lines detection device of structure type.The present invention is for 90 ° of fillet weld sealing properties detections at CM node in LNG ship construction
Method and vacuum plant, can overcome the undetectable difficulty of conventional vacuum cover herein during tightness test, improve LNG ship
Cargo tank efficiency of construction.
In order to achieve the above object of the invention, technical solution provided by the invention is as follows:
A kind of close property detection method for 90 ° of fillet welds at LNG ship CM node, 90 ° of angles are platform board and longitudinal wall at CM node
Angle between plate, 90 ° of fillet welds are apart from platform board end edge 30mm, which is characterized in that wrap on the vacuum apparatus designs
Panel, sealing plate, coaming plate, cellular rubber and connector are included, the panel is rectangular flanging panel, the flanging panel
One long side has right angle flange, the first sealing plate is fixed at the right angle flange, it is close to be fixed with second in another long edge position
Sealing plate is respectively fixed with a coaming plate on two short sides of the flanging panel, is equipped with the 4th sealing at the edge of the coaming plate
Plate is equipped with third sealing plate in the flanging face plate edge at the second sealing plate, and the both ends of the third sealing plate connect respectively
It is connected to the coaming plate, is fixed with rubber on first sealing plate, the second sealing plate, third sealing plate and the 4th sealing plate
Gelatin sponge, the cellular rubber on first sealing plate, the second sealing plate, third sealing plate and the 4th sealing plate surround one
Cavity is set on the flanging panel there are two connector and handle.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, one of the flanging panel
Flanging is equipped with the first stiffening plate, first stiffening plate be tightly attached to the flanging of the flanging panel and with the first sealing plate phase
Even, the second stiffening plate is provided on the outside of coaming plate, which is connected with the 4th sealing plate.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, the coaming plate is organic glass
The plate being made into, the coaming plate are connect in such a way that glue bonds with flanging panel, third sealing plate and the 4th sealing plate.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, third sealing plate and the 4th close
The angle formed at the link position of sealing plate is 90 °.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, first sealing plate,
Second sealing plate and third sealing plate are the material of rectangular channel that organic glass is made into, and the 4th sealing plate is length of the one end with bending
Square plate passes through between the first sealing plate, the second sealing plate, third sealing plate and the 4th sealing plate and corresponding cellular rubber
The mode of glue bonding connects.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, at second sealing plate
Cellular rubber cross section has a square notch, and the side length of the notch is 30mm.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, at second sealing plate
Cellular rubber is oblong-shaped, long side 30mm, and the cellular rubber at short side 25mm, with the 4th sealing plate is viscous by glue
It connects.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, first is connect described in two
Pressure gauge is connected, another connection snorkel, two connectors are connected to the upper and lower surfaces of flanging panel.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, the connector is opened for centre
The screwed round copper billet in hole and upper end, connector are equipped with rubber washer and four fixed screws, the intermediate aperture on connector
The mating through-hole excavated with flanging panel is aligned, and is connected and sealed by rubber washer and fixed screw.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, on flanging panel in
Portion is disposed with two handles, and connector described in two is distributed in the two sides of handle.
Based on the above-mentioned technical proposal, the method and Special vacuum for fillet weld sealing property detection in shipbuilding of the invention
Device passes through practical application, and achieve following technical effect: method and Special vacuum detection device of the invention is directed to platform
The platform board end that plate and longitudinal wall plate are formed by 90 ° of fillet welds, and form fillet weld only has the current demand of 30mm, specially
Structure design has been carried out, the close property detection of 90 ° of fillet welds at CM node is met, and has realized the requirement at the edge 30mm.This
Outside, the device of the invention patent also has the characteristics that structure is simple, convenient and practical, can not depend on large-scale special equipment
Close property detection is carried out, to substantially increase the shipbuilding efficiency of LNG ship.
Detailed description of the invention
Fig. 1 is the present invention for vacuum plant in the close property detection method of 90 ° of fillet welds at CM node in LNG ship construction
Overlooking structure diagram.
Fig. 2 is the present invention for vacuum plant side in the close property detection method of 90 ° of fillet welds at CM node in LNG ship construction
Depending on structural schematic diagram.
Fig. 3 is the present invention for vacuum plant in the close property detection method of 90 ° of fillet welds at CM node in LNG ship construction
Partial sectional view, i.e. A-A direction view in Fig. 1.
Fig. 4 is the present invention for vacuum plant in the close property detection method of 90 ° of fillet welds at CM node in LNG ship construction
Use schematic diagram.
Specific embodiment
90 ° of fillet weld sealing properties at CM node in coming to build LNG ship of the present invention with specific embodiment with reference to the accompanying drawing
The vacuum plant of detection further describes in detail, in the hope of providing a clearer understanding of its structure type and usage mode,
But it is not intended to limit the protection scope of the present invention.
The present invention is a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node, and this method is based on one kind
Special equipment exploitation is completed.Angle of 90 ° of angles between platform board and longitudinal wall plate at the CM node of LNG ship, longitudinal wall plate are vertical
In being welded to connect on platform board, weld seam is formd in angular position, 90 ° of fillet welds are apart from platform board end edge
30mm, this structure type determines that the close property detection device of existing large size can not be applied in the region, and these weld seams
It must be detected again, just highlight the importance of above-mentioned special equipment.
Fig. 1 is the present invention for vacuum plant in the close property detection method of 90 ° of fillet welds at CM node in LNG ship construction
Overlooking structure diagram, Fig. 2 be the present invention for LNG ship build at CM node in the close property detection method of 90 ° of fillet welds
Vacuum plant side structure schematic view, Fig. 3 are close property detection of the present invention for 90 ° of fillet welds at CM node in LNG ship construction
The partial sectional view of vacuum plant in method, i.e. A-A direction view in Fig. 1.As shown, on vacuum apparatus designs of the invention
It include panel, sealing plate, coaming plate, cellular rubber and connector, the panel is rectangular flanging panel 1, the flanging face
One long side of plate 1 has right angle flange, and the first sealing plate 2 is fixed at the right angle flange, is fixed in another long edge position
Second sealing plate 3 is respectively fixed with a coaming plate 4 on two short sides of the flanging panel 1, sets at the edge of the coaming plate 4
There is the 4th sealing plate 6, is equipped with third sealing plate 5, third sealing at the second sealing plate 3 at 1 edge of flanging panel
The both ends of plate 5 be connected separately with two pieces described in coaming plate 4, shape is angled 90 ° between third sealing plate 5 and the 4th sealing plate 6.
Cellular rubber 10 is respectively and fixedly provided on first sealing plate 2, the second sealing plate 3, third sealing plate 5 and the 4th sealing plate 6.
By on the flanging panel 1 and the first sealing plate 2, the second sealing plate 3, third sealing plate 5 and the 4th sealing plate 6
Cellular rubber be encircled into a cavity.Since the vacuum plant belongs to a seal closure design, need in the lower surface of panel 1
A cavity is formed, cavity here is by flanging panel 1 and coaming plate 4 and four pieces of sealing plates and its rubber pasted sea
Silk floss realizes that specifically tiltedly other plate face is bonded with Ship Structure for the lower edge of cellular rubber 101,102, due to platform board end away from
There was only 30mm from weld seam, the circular arc that turns of cellular rubber 101 is bonded with 90 ° of commissure legs by compression, to guarantee vacuum
Closed cavity is formed between device and structure.
If sealing device of the invention will realize vacuumizing, need to connect air pump, thus needs above-mentioned formed
Cavity and the connector that contact of the external world and check the device that space pressure changes in the vacuum lacuna, here just needs in flanging
Two connectors 9 are designed on panel 1, one of connector connects pressure gauge, another connection snorkel, the snorkel connects gas
Pump, two connectors 9 are connected to the upper and lower surfaces of panel 1, to carry out vacuum pumping and Pressure monitoring.
In specific design, the connector 9 is the screwed round copper billet of intermediate aperture and upper end.For the ease of
It connect, is set on connector 9 there are four fixed screw, and devise rubber washer in connecting portion, on connector 9 with panel 1
Intermediate aperture is corresponding, the mating through-hole excavated on flanging panel 1, the intermediate aperture by being aligned on connector 9 and flanging panel
On mating through-hole, and the two is connected and sealed by fixed screw and rubber washer.
In order to which retractable operation is convenient when constructor holds sealing device work in practicing, in the upper surface of flanging panel 1
On be additionally provided with two handles 8, which is specifically to be located at the top of flanging panel 1 to be arranged symmetrically along its length.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, the flanging panel 1 it is straight
It is equipped with the first stiffening plate 11 being connected with the first sealing plate 2 at the flanging of angle, the outside of the coaming plate 4 is provided with the second stiffening plate
7。
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, the coaming plate 4 is organic glass
The side that the plate that glass is made into, the coaming plate 4 and flanging panel 1, third sealing plate 4 and the 4th sealing plate 6 are bonded by glue
Formula connection.First sealing plate 2, the second sealing plate 3, third sealing plate 5 and the 4th sealing plate 6 is what organic glass was made into
Material of rectangular channel connects in such a way that glue bonds between each sealing plate and corresponding cellular rubber 9, guarantees at interconnection
Watertight requirement.
In close property detection method of the present invention for 90 ° of fillet welds at LNG ship CM node, at second sealing plate 3
101 cross section of cellular rubber on have square notch, the side length of notch is 30mm.At second sealing plate 3
Cellular rubber 101 is oblong-shaped, long side 30mm, and the cellular rubber 102 at short side 25mm, with the 4th sealing plate 6 passes through
Glue is bonded, and guarantees watertight requirement at interconnection.
In the construction of LNG ship oceangoing ship, as shown in figure 4, the present invention is for 90 ° of fillet weld sealing properties at CM node in LNG ship construction
The vacuum plant use process of detection including the following steps:
The first step, when close property is examined, after vacuum plant is ready to, to CM node at 90 ° of fillet welds spray liquid soaps, by vacuum
Device covers weld seam, passes through fine position itself and compresses cellular rubber, forms sealing space.
Second step adjusts breather valve, when pressure gauge reaches defined pressure value, passes through torch for illumination, directly detection weldering
It is sewed with bubble-free to emerge, reaches tightness of welding lines testing goal.
Third step closes intake valve after detection.
4th step repeats above three step after to be repaired if detection weld seam is defective, if weld seam is intact,
Detection terminates.
The present invention can effectively detect 90 ° of fillet welds of CM node, fundamentally solve general in LNG ship oceangoing ship building course
The logical insurmountable problem of vacuum (-tight) housing, effectively raises the construction progress of ship.
Claims (10)
1. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node, which is characterized in that use one in this method
Special detection device is planted, includes panel, sealing plate, coaming plate, cellular rubber and connector, the face on the vacuum apparatus designs
Plate is rectangular flanging panel (1), and a long side of the flanging panel (1) has right angle flange, consolidates at the right angle flange
Fixed first sealing plate (2), are fixed with the second sealing plate (3) in another long edge position, in two short sides of the flanging panel (1)
On be respectively fixed with a coaming plate (4), the edge of the coaming plate (4) be equipped with the 4th sealing plate (6), in the flanging panel (1)
Edge is equipped with third sealing plate (5) at the second sealing plate (3), and the both ends of the third sealing plate (5) are connected separately with described
Coaming plate (4), on first sealing plate (2), the second sealing plate (3), third sealing plate (5) and the 4th sealing plate (6)
It is fixed with cellular rubber (10), first sealing plate (2), the second sealing plate (3), third sealing plate (5) and the 4th sealing
Cellular rubber (10) on plate (6) surrounds a cavity, is set on the flanging panel (1) there are two connector (9) and handle
(8), this method comprises the following steps that
The first step, close property examine when, after vacuum plant is ready to, to CM node at 45° angle weld seam spray liquid soap, by vacuum
Device covers weld seam, passes through fine position itself and compresses cellular rubber, forms sealing space；
Second step adjusts breather valve, and when pressure gauge reaches defined pressure value, by torch for illumination, directly detecting weld seam has
Bubble-free is emerged, and tightness of welding lines testing goal is reached；
Third step closes breather valve after detection；
4th step repeats above three step after to be repaired and detects if weld seam is intact if detection weld seam is defective
Terminate.
2. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, the first stiffening plate (11) being connected with the first sealing plate (2) is equipped at the right angle flange of the flanging panel (1), in institute
It states and is provided with the second stiffening plate (7) on the outside of coaming plate (4).
3. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, the coaming plate (4) is the plate that organic glass is made into, the coaming plate (4) and flanging panel (1), third sealing plate (5)
It is connected in such a way that glue bonds with the 4th sealing plate (6).
4. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, shape is angled 90 ° between third sealing plate (5) and the 4th sealing plate (6).
5. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, first sealing plate (2), the second sealing plate (3), third sealing plate (5) and the 4th sealing plate (6) are organic glass
The material of rectangular channel being made into connects in such a way that glue bonds between each sealing plate and cellular rubber (9).
6. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, cellular rubber (101) cross section at second sealing plate (3) is square to have nick shaped, and the side length of notch is
30mm。
7. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, the cellular rubber (101) at second sealing plate (3) is oblong-shaped, long side 30mm, short side 25mm, with the
Cellular rubber (102) at four sealing plates (6) is bonded by glue.
8. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, (10) connection pressure gauges of connector described in two, another connection snorkel, two connectors (10) are connected to flanging
The upper and lower surfaces of panel (1).
9. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 8, feature
It is, the connector (10) is the screwed round copper billet of intermediate aperture and upper end, and connector (10) is equipped with rubber washer
With four fixed screws, the intermediate aperture on connector (10) is aligned with the mating through-hole that flanging panel (1) excavates, and passes through rubber
Washer and fixed screw are connected and sealed.
10. a kind of close property detection method for 90 ° of fillet welds at LNG ship CM node according to claim 1, feature
It is, is disposed with two handles (11) close to middle part on flanging panel (1), connector (10) described in two is distributed in handle
(11) two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286670.9A CN109297644A (en) | 2018-10-31 | 2018-10-31 | A kind of close property detection method for 90 ° of fillet welds at LNG ship CM node |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286670.9A CN109297644A (en) | 2018-10-31 | 2018-10-31 | A kind of close property detection method for 90 ° of fillet welds at LNG ship CM node |
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| CN109297644A true CN109297644A (en) | 2019-02-01 |
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Cited By (6)
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| CN109883618A (en) * | 2019-04-16 | 2019-06-14 | 中国五冶集团有限公司 | Structure and test method of vacuum box for tightness test of tank floor |
| CN113670525A (en) * | 2021-06-30 | 2021-11-19 | 沪东中华造船(集团)有限公司 | Cable stuffing box sealing device |
| CN114414160A (en) * | 2021-11-29 | 2022-04-29 | 上海江南长兴造船有限责任公司 | Method for detecting pre-tightness of dead space of ship |
| CN115031910A (en) * | 2022-05-17 | 2022-09-09 | 海洋石油工程股份有限公司 | Vacuum detection box applied to fillet weld between wall plate and TCP cover plate |
| CN115046693A (en) * | 2022-08-15 | 2022-09-13 | 中海油能源发展股份有限公司采油服务分公司 | Thin film type LNG transport ship liquid cargo tank inspection method |
| CN116202707A (en) * | 2023-03-31 | 2023-06-02 | 江南造船(集团)有限责任公司 | Air tightness detection system and detection method for liquid cargo tank shielding layer |
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| CN114414160A (en) * | 2021-11-29 | 2022-04-29 | 上海江南长兴造船有限责任公司 | Method for detecting pre-tightness of dead space of ship |
| CN115031910A (en) * | 2022-05-17 | 2022-09-09 | 海洋石油工程股份有限公司 | Vacuum detection box applied to fillet weld between wall plate and TCP cover plate |
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Application publication date: 20190201 |