CN205786408U - Band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block - Google Patents
Band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block Download PDFInfo
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- CN205786408U CN205786408U CN201620738800.8U CN201620738800U CN205786408U CN 205786408 U CN205786408 U CN 205786408U CN 201620738800 U CN201620738800 U CN 201620738800U CN 205786408 U CN205786408 U CN 205786408U
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- reference block
- main body
- block main
- liquefied ammonia
- containment vessel
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Abstract
The utility model discloses a kind of band Cold-keeping Layer liquefied ammonia pressure pipeline DR and detect reference block, including cylindrical containment vessel be located at the reference block main body within containment vessel, reference block main body is cone, the top of reference block main body is fixed with the first connecting portion, bottom surface is fixed with the second connecting portion, the inner radial of containment vessel be fixed with successively first be connected with the first connecting portion fix axle and be connected with the second connecting portion second fix axle, the axis of reference block main body coincides with the axis of containment vessel, it is filled with polyurethane material between containment vessel and reference block main body.The beneficial effects of the utility model: this utility model can remove liquefied ammonia gray scale, tested piping jacket and the Cold-keeping Layer impact on liquefied ammonia pipe detection gray scale, accuracy of detection is high.
Description
Technical field
This utility model relates to special equipment pressure pipeline technical field of nondestructive testing, it particularly relates to a kind of band is protected
Cooling layer liquefied ammonia pressure pipeline DR detects reference block.
Background technology
The most many special equipment testing agencies are all at the application DR detection technique ammonia refrigeration to non-stop-machine band Cold-keeping Layer
Inspection work implemented by pressure pipeline, and the Chinese patent of Patent No. ZL201110391098.4 discloses band Cold-keeping Layer liquid ammonia tube
The weld defect in road carries out the method detecting, evaluating, including using the gray level method corruption to band Cold-keeping Layer liquefied ammonia pressure pipeline
Erosion, the lack of penetration degree of depth, undercut, slag inclusion, the defect such as oneself height of incomplete fusion measure.
But for liquefied ammonia pressure pipeline, owing to liquefied ammonia makes compared with blank pipe, such as Fig. 1 institute for the absorption of ray
Show, during transillumination band liquid pipe wall thickness gray scale than during same blank pipe transillumination everywhere wall thickness gray scale increase, directly according to this gray scale
Measuring depth of defect with common test block, the depth of defect obtained can differ relatively big with the actual defects degree of depth, thus causes detection
The erroneous judgement of conclusion.
Utility model content
The purpose of this utility model is that proposing a kind of band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block, it is possible to disappear
Except liquefied ammonia and the Cold-keeping Layer gray scale shadow to detection when the ammonia refrigeration pressure pipeline of non-stop-machine band Cold-keeping Layer being carried out DR detection
Ring.
For realizing above-mentioned technical purpose, the technical solution of the utility model is achieved in that
A kind of band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block, including cylindrical containment vessel be located at described guarantor
Reference block main body within protective case, described reference block main body is cone, and the cross section of its top and bottom surface is disc, institute
The top stating reference block main body is fixed with the first connecting portion, and bottom surface is fixed with the second connecting portion, described containment vessel interior
Portion is radially fixed with first successively and fixes axle and second and fix axle, and described first connecting portion is fixed axle with described first and fixed phase
Even, described second connecting portion is fixed axle with described second and is fixedly linked, the axis of described reference block main body and containment vessel
Axis coincides, and is filled with polyurethane material between described containment vessel and reference block main body.
Further, described first connecting portion runs through and is fixed at described first and fixes axle, and described second connecting portion runs through
It is fixed at described second and fixes axle.
Further, the lateral surface of described reference block main body is along the circumferential direction provided with location line.
Further, a diameter of 5mm of the top disc of described reference block main body, a diameter of 29mm of bottom surface, a height of
48mm, the thickness of described containment vessel is 0.5mm, and internal diameter is 39mm.
Further, described location line is the groove along reference block main body outer circumference direction, the width of described groove
It is 0.2mm with the degree of depth near reference block body floor one side.
Further, described first fix axle and second to fix the material of axle be lucite, described reference block main body
Material be No. 20 steel, the material of described containment vessel is aluminum.
The beneficial effects of the utility model: this utility model is right by liquefied ammonia defect inspection position wall thickness is projected to
Measure up than test block main body, eliminate the impact on detection of the liquefied ammonia gray scale；By reference block main body is fixed at a guarantor
In protective case, and between containment vessel and reference block main body, fill polyurethane material, thus eliminate tested piping jacket
With the Cold-keeping Layer some effects to gray scale.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
The accompanying drawing used required in is briefly described, it should be apparent that, the accompanying drawing in describing below is the most of the present utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other accompanying drawing.
Fig. 1 is that band liquid pipe wall thickness gray scale described in the prior art compares schematic diagram with blank pipe wall thickness gray scale；
Fig. 2 is the cross-sectional view of the reference block described in this utility model embodiment；
Fig. 3 is that the described reference block that uses described in this utility model embodiment carries out the schematic diagram of pipe detection.
Shown in figure:
1-containment vessel；2-reference block main body；3-the first connecting portion；4-the second connecting portion；5-first fixes axle；6-second
Fixing axle；7-positions line.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole realities
Execute example.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained, broadly fall into
The scope of this utility model protection.
As in figure 2 it is shown, detect according to a kind of band Cold-keeping Layer liquefied ammonia pressure pipeline DR described in embodiment of the present utility model
Reference block, including cylindrical containment vessel 1 be located at the reference block main body 2 within described containment vessel 1, described reference block
Main body 2 is in cone, and the cross section of its top and bottom surface is disc, and the top of described reference block main body 2 is fixed with first
Connecting portion 3, bottom surface is fixed with the second connecting portion 4, and the inner radial of described containment vessel 1 is fixed with first successively and fixes axle 5
Fixing axle 6 with second, described first connecting portion 3 is fixed axle 5 with described first and is fixedly linked, and described second connecting portion 4 is with described
Second fixes axle 6 is fixedly linked, and the axis of described reference block main body 2 coincides with the axis of containment vessel 1, described protection
It is filled with polyurethane material between shell 1 and reference block main body 2.
For pipe diameter at the liquefied ammonia pipeline of 20mm～159mm, in the present embodiment, described reference block main body 2
A diameter of 5mm of top disc, a diameter of 29mm of bottom surface, a height of 48mm, the thickness of described containment vessel 1 is 0.5mm, and internal diameter is
39mm。
In the present embodiment, described first connecting portion 3 and the second connecting portion 4 are a cylinder component, and described first even
Meeting portion 3 to run through and be fixed at described first and fix axle 5, described second connecting portion 4 runs through and is fixed at described second and fixes axle 6.
Further, in the present embodiment, the lateral surface of described reference block main body 2 is along the circumferential direction provided with location line 7,
Described location line 7 is along the equally distributed groove in reference block main body 2 outer circumference direction, the width of described groove and right edge
The degree of depth be 0.2mm.It can be seen that the lateral surface of reference block main body 2 is provided with two location lines 7, two location
Line 7 adds the connection of the first connecting portion 3 and the connecting line of reference block main body 2 and the second connecting portion 4 and reference block main body 2
A total of 4 restraining lines of line, this 4 restraining lines distance the most between any two is 16mm, wall thickness be changed to 8mm, by black
Degree comparing calculation wall thickness change, it is also possible to changed by distance measurement calculated wall thickness, reference block main body 2 is decorated with centralized positioning
Labelling, can conveniently determine the relative position of defect.
In the present embodiment, described first fix axle 5 and second to fix the material of axle 6 be lucite, described organic glass
The thickness of glass is 3mm, and the material of described reference block main body 2 is No. 20 steel, and the material of described containment vessel 1 is aluminum.
Operation principle of the present utility model:
For liquefied ammonia pressure pipeline, owing to liquefied ammonia makes compared with blank pipe for the absorption of ray, band liquid during transillumination
Pipe wall thickness gray scale with as blank pipe transillumination time everywhere wall thickness gray scale increase, directly employing band liquid time gray scale and reference block
Gray scale be compared to measure depth of defect, the depth of defect obtained be less than the actual defects degree of depth, cause the mistake of test result
Sentence.
In order to get rid of the impact on pipeline gray scale of the liquefied ammonia gray scale, liquefied ammonia in pipeline is equivalent to carbon steel to the absorption of ray
Thickness change into the solid iron rod of a path, ignore minor variations and the pipeline manufacture of hollow pipe transillumination direction wall thickness
The little deviation of wall thickness, be simplified to a pipeline waiting wall thickness, then diameter is more than the 50mm liquefied ammonia pipeline less than 159mm
Wall thickness change and liquefied ammonia are equivalent to the thickness of carbon steel to the absorption of ray can project to a cone contrast calculated
In test block.Owing to the shape of cone reference block is equivalent to the consecutive variations of pipeline wall thickness, thus liquefied ammonia thickness pair can be removed
The impact of pipeline gray scale, thus draw the residual thickness of defective locations.
Owing to liquid medium can produce certain attenuation to ray, the aqueous medium introduced in the universal standard is relative to carbon
The attenuation factor of steel is than about 9:1, NH3And H2The mass attenuation system of O is roughly the same, and its line attenuation coefficient is relevant with density,
NH3Compare H2The density of O is little, and density with temperature's change is about about 0.7, thus can calculate that 10-13mm liquefied ammonia thickness is equivalent to
1mm steel plate thickness (estimated value), the liquid thickness in utilizing No. 20 steel to replace pipe, make cone reference block.
Impact pipeline test specimen gray scale measured in view of liquefied ammonia piping jacket and anti-cooling layer, cone reference block master
Circular lucite first thick for two ends 3mm before and after body 2 fixes axle 5, lucite second is fixed axle 6 and entangled, cone
Reference block main body 2 is fixed in the aluminum containment vessel 1 that 0.5mm is thick, fills between taper test block main body 2 and aluminum containment vessel 1
Polyurethane material, is used for simulating the cold insulation situation of liquefied ammonia pipeline, offsets the part gray scale of liquefied ammonia pipeline Cold-keeping Layer.
Understand technique scheme of the present utility model for convenience, below by way of new to this practicality in specifically used mode
The technique scheme of type is described in detail.
When specifically used, as Figure 2-3, test obtains the DR figure of cone reference block and tested pipe fitting in experiment
Picture, follow-up various measurements and calculating, all it is by mean of related software and carries out on the DR image obtained.DR at tested pipe fitting
On image, by tested etch pit gray scale maximum point C, at the axis of parallel pipe fitting, draw a line B1, in cone reference block
Axially one line B of pull-up obtains cone reference block centerline grey scale change curve, can find and not corrode pipe on B line
The gray value of road C1 point, can find and C point on tested pipe fitting and C1 point gray scale same position C' point and C1' point on B line, logical
Crossing the calibration function that computer software carries, with 5mm and 29mm in reference block, measured point being carried out wall thickness correction can distinguish
Measuring C' point and the wall thickness of C1', both differences are exactly the corrosion pit depth of C point.
In sum, by means of technique scheme of the present utility model, this utility model is by liquefied ammonia defect of pipeline
Detection position wall thickness projects to reference block main body and measures up, eliminates the impact on detection of the liquefied ammonia gray scale；By contrasting
Test block main body is fixed in a containment vessel, and fills polyurethane material between containment vessel and reference block main body, thus
Eliminate tested piping jacket and the Cold-keeping Layer some effects to gray scale.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in this utility model
Protection domain within.
Claims (6)
1. a band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block, it is characterised in that include the containment vessel (1) of cylinder
The reference block main body (2) internal with being located at described containment vessel (1), described reference block main body (2) is in cone, and its top
Being disc with the cross section of bottom surface, the top of described reference block main body (2) is fixed with the first connecting portion (3), and bottom surface is fixing to be set
Have the second connecting portion (4), the inner radial of described containment vessel (1) to be fixed with first successively to fix axle (5) and second and fix axle
(6), described first connecting portion (3) is fixed axle (5) with described first and is fixedly linked, described second connecting portion (4) and described second
Fixing axle (6) is fixedly linked, and the axis of described reference block main body (2) coincides with the axis of containment vessel (1), described guarantor
It is filled with polyurethane material between protective case (1) and reference block main body (2).
Band Cold-keeping Layer liquefied ammonia pressure pipeline DR the most according to claim 1 detects reference block, it is characterised in that described
A junction (3) runs through and is fixed at described first and fixes axle (5), and described second connecting portion (4) is run through and is fixed at described
Two fix axle (6).
Band Cold-keeping Layer liquefied ammonia pressure pipeline DR the most according to claim 2 detects reference block, it is characterised in that described right
Location line (7) along the circumferential direction it is provided with than the lateral surface of test block main body (2).
Band Cold-keeping Layer liquefied ammonia pressure pipeline DR the most according to claim 3 detects reference block, it is characterised in that described right
Ratio a diameter of 5mm of the top disc of test block main body (2), a diameter of 29mm of bottom surface, a height of 48mm, described containment vessel (1)
Thickness is 0.5mm, and internal diameter is 39mm.
Band Cold-keeping Layer liquefied ammonia pressure pipeline DR the most according to claim 4 detects reference block, it is characterised in that described fixed
Bit line (7) is the groove along reference block main body (2) outer circumference direction, the width of described groove and close reference block main body
(2) the bottom surface degree of depth on one side is 0.2mm.
Band Cold-keeping Layer liquefied ammonia pressure pipeline DR the most according to claim 1 detects reference block, it is characterised in that described
One fix axle (5) and second to fix the material of axle (6) be lucite, and the material of described reference block main body (2) is No. 20 steel,
The material of described containment vessel (1) is aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620738800.8U CN205786408U (en) | 2016-07-13 | 2016-07-13 | Band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620738800.8U CN205786408U (en) | 2016-07-13 | 2016-07-13 | Band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block |
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| Publication Number | Publication Date |
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| CN205786408U true CN205786408U (en) | 2016-12-07 |
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| CN201620738800.8U Active CN205786408U (en) | 2016-07-13 | 2016-07-13 | Band Cold-keeping Layer liquefied ammonia pressure pipeline DR detects reference block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646506A (en) * | 2019-09-21 | 2020-01-03 | 北京嘉盛智检科技有限公司 | Blade boss defect in-situ detection method |
-
2016
- 2016-07-13 CN CN201620738800.8U patent/CN205786408U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646506A (en) * | 2019-09-21 | 2020-01-03 | 北京嘉盛智检科技有限公司 | Blade boss defect in-situ detection method |
| CN110646506B (en) * | 2019-09-21 | 2023-04-07 | 北京嘉盛智检科技有限公司 | Blade boss defect in-situ detection method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |