CN104569004B - A kind of method of detection of water screen tube - Google Patents
A kind of method of detection of water screen tube Download PDFInfo
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- CN104569004B CN104569004B CN201510007208.0A CN201510007208A CN104569004B CN 104569004 B CN104569004 B CN 104569004B CN 201510007208 A CN201510007208 A CN 201510007208A CN 104569004 B CN104569004 B CN 104569004B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 230000005251 gamma ray Effects 0.000 claims abstract description 19
- 238000007689 inspection Methods 0.000 claims abstract description 18
- 235000004443 Ricinus communis Nutrition 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 2
- 210000002414 leg Anatomy 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000009659 non-destructive testing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of method of detection of water screen tube, this method includes：Entrance (9) is cut on the fin (8) of the neighbouring weld seam (7) of the interface of water screen tube (6) to be detected；The exposure tube (1) of gamma ray inspection device is directed at the weld seam (7), the fixed exposure tube (1) by the photohead that the entrance (9) inserts burner hearth and adjusts the exposure tube (1)；At the weld seam (7) place to be detected, film (10) is set；Open gamma ray inspection device, the gamma-rays for launching exposure tube (1) is beaten on the weld seam (7) and is transmitted on the film (10), closes gamma ray inspection device after the film (10) fully exposure and removes the exposure tube (1) and the film (10).This method can not have to set operating platform and fixed support inside burner hearth, enter burner hearth inside processing without staff, not only increase operating efficiency, and improve security.
Description
Technical field
The present invention relates to nondestructive inspection field, in particular it relates to a kind of method of detection of water screen tube.
Background technology
At present, gamma-rays has a wide range of applications in Non-destructive Testing on Metal, and gamma-rays does not damage in Non-destructive Testing on Metal
Hinder object to be detected, and have the advantages that it is light, flexible, do not limited by narrow space, do not need power supply, be widely used in pot
The weld seam Non-Destructive Testing of stove " four pipes " and pipeline.
The principle of gamma ray inspection is：The thickness or density of testee each several part are different because of the presence of defect,
When gamma-rays is penetrating checking matter, the absorbed degree of gamma-rays is also correspondingly different.If by what is absorbed in various degree
Gamma-rays is incident upon on gamma-rays film, can obtain showing the photo of object thickness change and internal flaw situation after developed
(gamma-rays egative film).This method is referred to as gamma radiography.
Generally, gamma ray projector and film are separately positioned on the both sides of object to be detected.In the membrane type to forming boiler furnace
When the weld seams such as panelized-tube-wall section, steam tube panel carry out ray detection, it is necessary into fixing gamma ray projector exposure in burner hearth
Head, and film is arranged outside burner hearth.This needs to set up operating platform respectively boiler furnace is inside and outside, and by staff
Radiographic source and film are set in the both sides of water screen tube using operating platform, cumbersome, particularly aloft operation is dangerous is
Number is high.
A kind of accordingly, it is desirable to provide gamma ray inspection method that operating platform need not be set inside burner hearth.
The content of the invention
It is an object of the invention to provide a kind of method of detection of the water screen tube for boiler, the method for detection need not be
Operating platform is set inside burner hearth and outside burner hearth.
To achieve these goals, the present invention provides a kind of method of detection of water screen tube, wherein, water screen tube to be detected
The outer operating platform being provided with for installing or overhauling water screen tube of screen, this method include：S1, in water screen tube to be detected
Entrance is cut on the fin of the neighbouring weld seam of interface；S2, the exposure tube of gamma ray inspection device inserted by the entrance
Burner hearth simultaneously adjusts the exposure tube so that the photohead of the exposure tube is directed at the weld seam, then fixes the exposure tube；
S3, in the commissure to be detected film is set；S4, gamma ray inspection device is opened, penetrate the γ of the exposure tube transmitting
Line transillumination is on the weld seam and is transmitted on the film, and gamma ray inspection device is closed simultaneously after the film fully exposes
Remove the exposure tube and the film.
Preferably, the exposure tube is provided with the end back-flexing of the photohead, to cause the exposure tube by institute
It can launch gamma-rays towards burner hearth outside after stating entrance insertion burner hearth inside.
Preferably, in step s 2, the exposure tube is fixed in such a way that the photohead of the exposure tube apart from the water
The inner surface 550-650 millimeters of cold wall tube panel；And the gamma-rays of the exposure tube transmitting is in the incident angle of the commissure
For 10-20 °.
Preferably, the width of the entrance horizontal direction be 2-3 centimetres, and the entrance from the commissure respectively to
Go up and extend downwardly 10-12 centimetres.
Preferably, the step S3 includes arranging stereotype on the film after fixation.
Preferably, in the step S2, the exposure tube is fixed using support, the support includes supporting leg, the supporting leg
Foot is provided with the magnet that can be adsorbed on the panelized-tube-wall section.
Preferably, the magnet is formed to the castor walked on the panelized-tube-wall section, and the castor is rotatable
Installation is on the bracket.
Preferably, the supporting leg is two groups of laterally opposed setting, and the support includes the branch of supporting leg described in two groups of connection
Beam is supportted, the support beam includes the first supporting part and is arranged on second supporting part at the first supporting part both ends, described in every group
Supporting leg is vertically arranged and connected by second supporting part.
Preferably, the support also includes being arranged on the support base for being used to fix the exposure tube in the support beam,
The support base includes being used to fix the support slot of the exposure tube and for the support slot to be fixed on into the support beam
Universal steering base.
Preferably, in the side wall of the support slot formed with screwed hole, the exposure tube by with the screwed hole screw thread
The bolt of connection is compressed and fixed.
Pass through above-mentioned technical proposal, by using installing or the platform set up of maintenance panelized-tube-wall section, and by gamma-rays
The exposure tube of failure detector from the fin between water screen tube entrance insertion burner hearth inside, so as to inside burner hearth to
Gamma-rays is launched in outside, therefore film can be set outside panelized-tube-wall section and is imaged by the gamma-rays of transmission, this method
It can not have to set inside burner hearth outside operating platform and burner hearth and set up fixed support, enter without staff in burner hearth
Portion's operation, operating efficiency is not only increased, and improve security.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the solid that panelized-tube-wall section outer surface is arranged on according to a kind of support of embodiment of the present invention
Figure.
Fig. 2 is view of the structure from the sidepiece of panelized-tube-wall section in Fig. 1.
Fig. 3 is the three-dimensional structure diagram according to a kind of support of embodiment of the present invention.
Fig. 4 is the enlarged drawing of a-quadrant in Fig. 3.
Fig. 5 is the structural representation for the support slot for being fixed with exposure tube.
Description of reference numerals
The support of 1 exposure tube 2
The support beam of 3 supporting leg 4
The water screen tube of 5 support base 6
The fin of 7 weld seam 8
The film of 9 entrance 10
The supporting part of 41 first supporting part 42 second
51 support slot, 52 universal steering base
52 bolts
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
According to an aspect of the present invention, there is provided a kind of method of detection of water screen tube, wherein, panelized-tube-wall section to be detected
The outer operating platform being provided with for installing or overhauling water screen tube, this method include：S1, in water screen tube 6 to be detected
Entrance 9 is cut on the fin 8 of the neighbouring weld seam 7 of interface；S2, the exposure tube 1 of gamma ray inspection device passed through into the entrance 9
Insertion burner hearth simultaneously adjusts the exposure tube 1 so that the photohead alignment weld seam 7 of exposure tube 1, then fixes exposure tube 1；S3,
Film 10 is set at weld seam 7 to be detected；S4, gamma ray inspection device is opened, the gamma-rays that exposure tube 1 is launched is beaten described
On weld seam 7 and it is transmitted on film 10, closes gamma ray inspection device after film 10 fully exposure and remove exposure tube 1 and glue
Piece 10.
Staff is when installing or overhauling water screen tube, it is necessary to build operating platform in the outside of panelized-tube-wall section, originally
The method of detection of invention can utilize the operating platform to implement；Especially, during panelized-tube-wall section is installed, in constructor
After member is mounted with a part of water screen tube, maintainer can detect mounted water in stoppage phase by means of the operating platform
The weld seam of cold wall pipe junction.In this method of detection, the entrance 9 cut on fin 8 can allow staff to expose
Pipe 1 is inserted into inside burner hearth outside panelized-tube-wall section, exposure tube 1 can inside burner hearth to burner hearth external emission gamma-rays,
And set film that transmission imaging can be achieved outside panelized-tube-wall section.Therefore, this method of detection need not visit gamma-rays
Hinder device to be arranged inside the burner hearth of boiler and build operating platform for gamma ray inspection device, staff is also without entrance
Implement corresponding operation inside burner hearth, this not only simplifies operation, improves operating efficiency, and improve security.
Specifically, as shown in Fig. 1 and Fig. 2 and Fig. 5, exposure tube 1 is provided with the end back-flexing of the photohead, with
So that exposure tube 1 can launch gamma-rays after inserting burner hearth inside by entrance 9 towards burner hearth outside.The knee of exposure tube 1 is bent
Rate should not be excessive, can be conveyed glibly with being advantageous to radiographic source.
In addition, in step s 2, exposure tube 1 is fixed in such a way that the transmitting terminal of exposure tube 1 apart from the panelized-tube-wall section
Inner surface 550-650 millimeters (L as shown in Figure 21)；And incidence of the gamma-rays that the exposure tube 1 is launched at weld seam 7
Angle (the θ angles in Fig. 2) is 10-20 °.By above distance and angle design, film can be caused to obtain preferably imaging effect
Fruit.However, the distance between emission source and part to be detected a flaw and incident angle can be according to emission source intensity and part to be detected a flaw
Structure be adjusted, carried out parameter optimization only for the weld seam than more conventional water screen tube herein, but the spy of the present invention
Hinder method to be not limited thereto.
According to a kind of embodiment of the present invention, the width of the horizontal direction of entrance 9 is 2-3 centimetres, and entrance 9 from
Extend 10-12 centimetres at weld seam 7 up and down respectively.Entrance 9 can cut to be formed by gas welding, and the shape of entrance 9 can be with
For the various shapes for being adapted for insertion into exposure tube 1, such as can be rectangle, to ensure that the photohead of the back-flexing of exposure tube 1 can
To be inserted into by entrance 9 inside burner hearth.The size design of entrance 9 should meet that exposure tube 1 can freely adjust gamma-rays
Incident angle at weld seam 7；The position of entrance 9 should also be as making exposure tube 1 through simply adjusting can be used.
In addition, the step S3 includes arranging stereotype on film 10 after fixation.After the stereotype can prevent transmission
The gamma-rays beaten on film 10 continues outwards transmission, to protect operating personnel.The stereotype and film 10 can pass through magnetic
Paster folder is fixed on the outer surface of the panelized-tube-wall section.
According to a kind of embodiment of the present invention, as shown in figure 3, in the step S2, fixed and exposed using support 2
Light pipe 1, wherein, support 2 can use various appropriate formats.According to another aspect of the present invention, there is provided a kind of support 2, the branch
Frame 2 includes supporting leg 3, and the foot of the supporting leg 3 is provided with the magnet that can be adsorbed on the panelized-tube-wall section.
The support 2 of the present invention can be fixed on the outer surface of panelized-tube-wall section by staff by the suction of magnet,
Then the exposure tube 3 of gamma ray inspection device (can will be connected into adjacent water by the space between adjacent water screen tube
The fin of cold wall pipe cuts open to form entrance) it is inserted into the inside of burner hearth and is fixed on support 2.By means of the present invention support 2,
Gamma ray inspection device may not necessarily be fixed inside burner hearth, it is not necessary to which staff enters burner hearth inside processing, it is not required that
Shelf is set up, not only increases operating efficiency, also improves security.
Preferably, the magnet is formed as the castor 31 that can be walked on the panelized-tube-wall section, and the castor 31 can revolve
What is turned is arranged on support 2.Support 2 after panelized-tube-wall section, overcomes absorption affinity that support 2 is removed into institute by the magnet absorption
The power needed is very big, and this make it that position of the change support 2 on panelized-tube-wall section is relatively difficult.However, magnet is formed as into pin
After the form of wheel, after completing to detect in certain, support 2 can be promoted to be moved to next place panelized-tube-wall section to be detected
Place, can make operation more convenient and easy.
In addition, supporting leg 3 is two groups of laterally opposed setting, the support 2 includes the support beam 4 of two groups of supporting legs 3 of connection, branch
Support beam 4 includes the first supporting part 41 and is arranged on second supporting part 42 at the both ends of the first supporting part 41, and every group of supporting leg 3 is along perpendicular
Nogata is connected to arrangement and by the second supporting part 42.Support 2 can have diversified forms, such as can have 3,5 or more
Supporting leg and connected by support beam, be fixed on the surface of panelized-tube-wall section as long as can stablize and exposure tube 1 can be fixed
, other a variety of simple deformations are all readily apparent that no further details to be given herein.
Especially, in the supporting leg 3, the spacing of two neighboring supporting leg 3 vertically is more than 20 centimetres.Support 2 is arranged
In the interface of water screen tube, film can be attached to interface, and film is shaped as the larger strip of cross-directional length
Shape, it is therefore desirable to ensure that the supporting leg 3 of support 2 does not produce interference with film, i.e. supporting leg 3 is more than 20 lis in spacing vertically
Rice.
In addition, for ease of fixed exposure tube 1, support 2 can also include being arranged in support beam 4 be used for fix exposure tube
1 support base 5.
Specifically, as shown in figure 4, support base 5 includes being used for the support slot 51 for fixing exposure tube 1 and for by support slot 51
The universal steering base 52 being fixed in support beam 4.Exposure tube 1 can be contained in the channel space of support slot 51 and fix (such as
Shown in Fig. 5), it is further described below.Universal steering base 52 can change the angle of support slot 51, so as to change fixation
The direction of exposure tube 1 in support slot 51, therefore can adjust exposure tube 1 allows its ray launched to obtain and suitably take
To.
In addition, formed with screwed hole in the side wall of support slot 51, exposure tube 1 passes through the spiral shell that is threadedly coupled with the screwed hole
Bolt 53 is compressed and fixed.After exposure tube 1 is placed in support slot 51, with swivel bolt 53 bolt 53 can be made to be pressed on exposure tube 1
On to fix exposure tube 1, when need remove exposure tube 1 when, the bolt can be unscrewed.
According to a kind of embodiment of the present invention, support slot 51 can be revolved in the horizontal plane by universal steering base 52
Three-sixth turn and can in perpendicular with respect to the horizontal plane rotate -45~45 degree, and universal steering base 52 have rotate
Damping force.The size of damping due to rotation power should handle suitable scope, and one side operating personnel can relatively easily adjust branch
The angle of groove 51 is supportted, another aspect support slot 51 can not freely overcome the damping force and rotate, for example, due to exposure tube 1
Action of Gravity Field causes support slot 51 to rotate.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (5)
1. a kind of method of detection of water screen tube, wherein, it is provided with outside panelized-tube-wall section to be detected for installing or overhauling water cooling
The operating platform of wall pipe, this method include：
S1, entrance (9) is cut on the fin (8) of the neighbouring weld seam (7) of the interface of water screen tube (6) to be detected；
S2, in the step S2, including：
S2-1, the exposure tube (1) of gamma ray inspection device is inserted into burner hearth by the entrance (9),
S2-2, using the fixed exposure tube of support (2), the exposure tube (1) is fixed in such a way that the exposure of the exposure tube (1)
Inner surface 550-650 millimeter of the shaven head apart from the panelized-tube-wall section；And the gamma-rays of exposure tube (1) transmitting is described
The incident angle at weld seam (7) place is 10-20 °,
The support (2) includes supporting leg (3), and the supporting leg (3) is two groups of laterally opposed setting, and the support (2) includes connection
The support beam (4) of supporting leg (3) described in two groups, the support beam (4) include the first supporting part (41) and are arranged on described first
Second supporting part (42) at support part (41) both ends, supporting leg (3) described in every group are vertically arranged and supported by described second
Portion (42) connects, and the support (2) also includes being arranged on the branch for being used to fix the exposure tube (1) in the support beam (4)
Support seat (5), the support base (5) includes being used for the support slot (51) for fixing the exposure tube (1) and for by the support slot
(51) the universal steering base (52) being fixed in the support beam (4),
S2-3, the foot of the supporting leg (3) are provided with the magnet that can be adsorbed on the panelized-tube-wall section, and the magnet is formed as
The castor (31) that can be walked on the panelized-tube-wall section, the castor (31) are rotatably mounted on the support (2), phase
The spacing of adjacent two supporting legs (3) vertically is more than 20 centimetres；
S3, at the weld seam (7) place to be detected film (10) is set；
S4, gamma ray inspection device is opened, the gamma-rays transillumination for launching the exposure tube (1) is on the weld seam (7) and saturating
It is mapped on the film (10), closes gamma ray inspection device after the film (10) fully exposure and remove the exposure tube
And the film (10) (1).
2. method of detection according to claim 1, wherein, the end that the exposure tube (1) is provided with the photohead is anti-
To bending, to cause the exposure tube (1) to be penetrated after inserting burner hearth inside by the entrance (9) towards transmitting γ on the outside of burner hearth
Line.
3. method of detection according to claim 1, wherein, the width of entrance (9) horizontal direction is 2-3 centimetres, and
And the entrance (9) extends 10-12 centimetres up and down respectively from the weld seam (7).
4. method of detection according to claim 1, wherein, the step S3 is included on the film (10) after fixation
Arrange stereotype.
5. method of detection according to claim 1, wherein, formed with screwed hole, institute in the side wall of the support slot (51)
Exposure tube (1) is stated to compress to fix by the bolt (53) being threadedly coupled with the screwed hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007208.0A CN104569004B (en) | 2015-01-07 | 2015-01-07 | A kind of method of detection of water screen tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007208.0A CN104569004B (en) | 2015-01-07 | 2015-01-07 | A kind of method of detection of water screen tube |
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| Publication Number | Publication Date |
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| CN104569004A CN104569004A (en) | 2015-04-29 |
| CN104569004B true CN104569004B (en) | 2018-02-23 |
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| CN201510007208.0A Active CN104569004B (en) | 2015-01-07 | 2015-01-07 | A kind of method of detection of water screen tube |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110297004B (en) * | 2019-07-31 | 2023-12-22 | 中国电建集团福建工程有限公司 | Patch special fixture for water-cooled wall welded junction ray detection and use method |
| CN112304980B (en) * | 2020-10-28 | 2023-05-16 | 西安热工研究院有限公司 | A directional X-ray flaw detector support device for non-destructive testing of boiler tube panel welded joints and its application method |
| CN113176283B (en) * | 2021-04-27 | 2023-03-21 | 盛安建设集团有限公司 | Automatic device for detecting welding seam of boiler tube bank |
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|---|---|---|---|---|
| CN101769881A (en) * | 2010-01-19 | 2010-07-07 | 华南理工大学 | Gamma-ray source-based ray nondestructive testing device for foreign body inside small-diameter metal tube |
| CN102279198A (en) * | 2011-04-25 | 2011-12-14 | 中国十九冶集团有限公司 | SMT method and structure for radiographic detection of pipe welds |
| CN102495083A (en) * | 2011-12-09 | 2012-06-13 | 福建省第一电力建设公司 | Gamma ray inspection device |
| CN102608139A (en) * | 2012-03-04 | 2012-07-25 | 茂名重力石化机械制造有限公司 | Radiographic detection method for welding joint of outer tube sleeved with inner tube |
| CN203299149U (en) * | 2013-05-31 | 2013-11-20 | 陕西西宇无损检测有限公司 | Boiler closely-spaced tube flaw detection bracket using r-ray detection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281333A (en) * | 1995-04-11 | 1996-10-29 | Sumitomo Metal Ind Ltd | How to detect flaws on the inner surface of metal pipes |
-
2015
- 2015-01-07 CN CN201510007208.0A patent/CN104569004B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769881A (en) * | 2010-01-19 | 2010-07-07 | 华南理工大学 | Gamma-ray source-based ray nondestructive testing device for foreign body inside small-diameter metal tube |
| CN102279198A (en) * | 2011-04-25 | 2011-12-14 | 中国十九冶集团有限公司 | SMT method and structure for radiographic detection of pipe welds |
| CN102495083A (en) * | 2011-12-09 | 2012-06-13 | 福建省第一电力建设公司 | Gamma ray inspection device |
| CN102608139A (en) * | 2012-03-04 | 2012-07-25 | 茂名重力石化机械制造有限公司 | Radiographic detection method for welding joint of outer tube sleeved with inner tube |
| CN203299149U (en) * | 2013-05-31 | 2013-11-20 | 陕西西宇无损检测有限公司 | Boiler closely-spaced tube flaw detection bracket using r-ray detection |
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