CN110849920A - Preparation method and application of image quality measuring block for pipe weld seam radiographic testing - Google Patents
Preparation method and application of image quality measuring block for pipe weld seam radiographic testing Download PDFInfo
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- CN110849920A CN110849920A CN201911191176.9A CN201911191176A CN110849920A CN 110849920 A CN110849920 A CN 110849920A CN 201911191176 A CN201911191176 A CN 201911191176A CN 110849920 A CN110849920 A CN 110849920A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
- G01N2223/1016—X-ray
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/629—Specific applications or type of materials welds, bonds, sealing compounds
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention belongs to the technical field of nondestructive testing, and particularly relates to a preparation method and application of an image quality measuring test block for radiographic testing of a conduit weld joint. The technical scheme of the invention is as follows: a preparation method of an image quality test block for pipe weld seam radiographic inspection comprises the following steps: 1) manufacturing a simulated catheter: selecting the same type of straight guide pipes according to the specification of the part to be detected, and welding the two sections of straight guide pipes to form a simulation guide pipe; 2) assembling and installing: selecting an image quality measuring wire corresponding to the material and the thickness of a part to be detected, attaching the simulation conduit and the image quality measuring wire, ensuring that the image quality measuring wire is perpendicular to the welding line and is positioned in the central area of the simulation conduit, and fixing the image quality measuring wire in a trapezoidal mold; 3) manufacturing a test block: and injecting epoxy resin into the trapezoidal mold, taking out after the epoxy resin is solidified, and polishing to be flat to form an image quality measuring test block. The invention can conveniently represent the film sensitivity of the transillumination part, improve the detection efficiency and ensure the detection quality.
Description
Technical Field
The invention belongs to the technical field of nondestructive testing, and particularly relates to a preparation method and application of an image quality measuring test block for radiographic testing of a conduit weld joint.
Background
When radiographic inspection is carried out, an image quality meter and a part are required to be transilluminated simultaneously so as to inspect and quantitatively evaluate the radiographic image quality. The image quality meter is a device for measuring the radiographic sensitivity of radiographs, as shown in attached figures 1-3, the linear image quality meter adopts a metal wire made of a material which is the same as or similar to the material of a workpiece to be transilluminated, the metal wire is packaged in a material with a low radiation absorption coefficient, the metal wire is transilluminated with parts at the same time, whether the wire diameter identifiable on a negative by the image quality meter meets the standard requirement is judged, so that the image quality of the radiograph is checked and quantitatively evaluated, and the transillumination technology, the processing condition of a film darkroom, the defect inspection capability and the like are evaluated.
When the weld joint is transilluminated, the requirements on the image quality meter are as follows: the image quality meter is placed on one side of the detected welding seam source, so that the metal wire crosses the welding seam and is perpendicular to the welding seam. The length of the smallest filament found for the weld must not be less than 10 mm. If the placement and transillumination of the image quality meter can not meet the requirements, the negative film can not be effectively used as a basis for judging the internal quality of the part, thereby causing quality hidden trouble.
When a linear image quality meter is used for transilluminating a complex conduit welding seam, the following main problems exist, as shown in figures 4 and 5:
1) due to different pipe-shaped bending, different distribution of welding seam positions and different heights of structures on two sides of the welding seam, the linear image quality meter is not attached to the welding seam, and the sensitivity can not be accurately represented.
2) Due to the fact that the placement space is narrow, the stress is unstable, the diameter of a welding line is small and the like, the placement of the linear image quality meter is difficult, and the group number and the material of the image quality meter on the negative film cannot be identified, the wire should be found to fall off and the like.
3) The linear image quality meter can cause the metal wire to deform after being repeatedly bent and worn, and cannot be used.
QJ2866 radiographic inspection method for fusion welded butt joints of pipes "mentioned: the catheter can not be placed with the image quality timing, a catheter which is consistent with the specification, the material and the welding conditions of the transmitted catheter is used for manufacturing a contrast test catheter, the image quality timing is placed on the contrast test catheter according to requirements, and the contrast test catheter is placed on the outer side of the transmitted catheter and is simultaneously transilluminated. ".
Disclosure of Invention
The invention provides a preparation method and application of an image quality measuring block for radiographic inspection of a conduit weld joint, which can conveniently represent the film sensitivity of transillumination parts, improve the inspection efficiency and ensure the inspection quality.
The technical scheme of the invention is as follows:
a preparation method of an image quality test block for pipe weld seam radiographic inspection comprises the following steps:
1) manufacturing a simulated catheter: selecting the same type of straight guide pipes according to the specification of the part to be detected, welding the two sections of straight guide pipes to form a simulation guide pipe, wherein the simulation guide pipe only reserves the welding seam part needing transillumination, and the bending structure and the redundant part of the part to be detected are removed;
2) assembling and installing: selecting an image quality measuring wire corresponding to the material and the thickness of a part to be detected, attaching the simulation conduit and the image quality measuring wire, ensuring that the image quality measuring wire is perpendicular to the welding line and is positioned in the central area of the simulation conduit, and fixing the image quality measuring wire in a trapezoidal mold; meanwhile, type marks of standard numbers, group numbers, materials and silk numbers of the image quality meter are arranged at the end position of the simulation conduit and are fixed in the trapezoidal mold;
3) manufacturing a test block: and injecting epoxy resin into the trapezoidal mold, taking out after the epoxy resin is solidified, and polishing to be flat to form an image quality measuring test block.
The application of the image quality measuring block for the pipe weld seam radiographic inspection prepared by the method comprises the following steps:
a) selecting an image quality measuring test block with the same pipe diameter, thickness and material as the to-be-detected conduit;
b) performing transillumination arrangement on the catheter to be detected according to the requirements of a process chart;
c) placing the image quality meter test block beside a welding line of the to-be-detected conduit with poor sensitivity in a transillumination area, and ensuring that the to-be-detected conduit and the image quality meter test block form images on a negative film at the same time by taking an image with upward quality meter wires;
d) and simultaneously carrying out ray detection and evaluation on the catheter to be detected and the image quality measuring block, wherein the image quality measuring sensitivity of the image quality measuring block is used for representing the sensitivity of the catheter to be detected.
The invention has the beneficial effects that: the image quality measuring test block prepared by the invention can be universally used in the radiographic inspection of catheters with various shapes and the same thickness, material and welding mode, and can be repeatedly used. The image quality meter test block and the image quality meter wire corresponding to the thickness of the guide pipe are arranged in the central area of the vertical welding pipe, the image quality meter and the simulation guide pipe are firmly combined and are not easy to be dislocated, and marks such as image quality meter materials and wire numbers can be recognized on the negative film after imaging. The trapezoidal image quality meter test block appearance can prevent that the test block from putting and reversing. The image quality meter test block prepared by the invention solves the problem of placing the image quality meter of a complex catheter, saves the time for adjusting the relative position of the image quality meter and the catheter, is convenient and quick, and can avoid the deformation caused by repeated bending of a linear image quality meter.
Drawings
FIG. 1 is a front view of a linear image quality meter;
FIG. 2 is a side view of a line image quality meter;
FIG. 3 is a picture of a linear image quality monitor object;
FIG. 4 is a schematic view showing a detection state of a catheter to be detected;
FIG. 5 is a schematic diagram showing the relationship between the linear image quality meter and the catheter to be examined; (a) top view, (b) side view;
FIG. 6 is a perspective view of an image quality block;
FIG. 7 is a front view of an image quality measurement block;
FIG. 8 is a right side view of the image quality measurement block;
FIG. 9 is a top view of the image quality measurement block;
FIG. 10 is a diagram illustrating the use state of the image quality test block;
FIG. 11 is an example of a transillumination negative of an image quality measurement block.
In the figure: the device comprises a test block 1, a simulation catheter 2, a simulation catheter welding line 3, a simulation catheter wire 4, a simulation mass spectrometer wire 5, type marks of mass spectrometer materials and wire numbers 6, type marks of mass spectrometer standard numbers and group numbers 7, a to-be-detected catheter 8, a transillumination field 9, a film 10, a plastic plate 11, a to-be-detected catheter welding line 12, a ray source 13 and a ray bundle 13.
Detailed Description
A preparation method of an image quality test block for pipe weld seam radiographic inspection comprises the following steps:
1) manufacturing a simulated catheter 2: according to the specification of the part to be detected, the same type of straight guide pipes are selected, two sections of straight guide pipes are welded to form a simulation guide pipe 2, only the welding seam 3 part needing transillumination is reserved in the simulation guide pipe 2, and the bending structure and the redundant part of the part to be detected are removed;
2) assembling and installing: selecting an image quality measuring wire 4 corresponding to the material and the thickness of a part to be detected, attaching the simulation conduit 2 to the image quality measuring wire 4, ensuring that the image quality measuring wire 4 is perpendicular to the welding line 3 and is positioned in the central area of the simulation conduit 2, and fixing the image quality measuring wire 4 in a trapezoidal mold; meanwhile, type marks 5 and 6 of standard numbers, group numbers, materials and silk numbers of the image quality meter are arranged at the end position of the simulation conduit 2 and fixed in the trapezoidal mold;
3) manufacturing a test block: and injecting epoxy resin into the trapezoidal mold, taking out after the epoxy resin is solidified, and polishing and flattening to form an image quality measuring block 1, as shown in figures 6-9.
The application of the image quality measuring block for the pipe weld seam radiographic inspection prepared by the method comprises the following steps:
a) selecting an image quality measuring test block 1 with the same pipe diameter, thickness and material as the conduit 7 to be detected;
b) transillumination arrangement is carried out on the conduit 7 to be detected according to the requirements of a process chart;
c) placing the image quality meter test block 1 beside a welding line 11 of the to-be-tested conduit with poor sensitivity in a transillumination area, and ensuring that the to-be-tested conduit 7 and the image quality meter test block 1 form images on a negative film 9 at the same time as the quality meter wire 4 faces upwards;
d) ray detection and evaluation are carried out on the catheter 7 to be detected and the image quality measuring block 1 at the same time, and the sensitivity of the image quality measuring block 1 is used for representing the sensitivity of the catheter 7 to be detected; the schematic use state of the image quality test block is shown in figure 10, and the perspective negative film of the catheter weld seam radiographic testing image quality test block is shown in figure 11.
Claims (2)
1. A preparation method of an image quality test block for pipe weld seam ray detection is characterized by comprising the following steps:
1) manufacturing a simulated catheter: selecting the same type of straight guide pipes according to the specification of the part to be detected, welding the two sections of straight guide pipes to form a simulation guide pipe, wherein the simulation guide pipe only reserves the welding seam part needing transillumination, and the bending structure and the redundant part of the part to be detected are removed;
2) assembling and installing: selecting an image quality measuring wire corresponding to the material and the thickness of a part to be detected, attaching the simulation conduit and the image quality measuring wire, ensuring that the image quality measuring wire is perpendicular to the welding line and is positioned in the central area of the simulation conduit, and fixing the image quality measuring wire in a trapezoidal mold; meanwhile, type marks of standard numbers, group numbers, materials and silk numbers of the image quality meter are arranged at the end position of the simulation conduit and are fixed in the trapezoidal mold;
3) manufacturing a test block: and injecting epoxy resin into the trapezoidal mold, taking out after the epoxy resin is solidified, and polishing to be flat to form an image quality measuring test block.
2. Use of an image quality test block for radiographic testing of a conduit weld prepared by the method of claim 1, comprising the steps of:
a) selecting an image quality measuring test block with the same pipe diameter, thickness and material as the to-be-detected conduit;
b) performing transillumination arrangement on the catheter to be detected according to the requirements of a process chart;
c) placing the image quality meter test block beside a welding line of the to-be-detected conduit with poor sensitivity in a transillumination area, and ensuring that the to-be-detected conduit and the image quality meter test block form images on a negative film at the same time by taking an image with upward quality meter wires;
d) and simultaneously carrying out ray detection and evaluation on the catheter to be detected and the image quality measuring block, wherein the image quality measuring sensitivity of the image quality measuring block is used for representing the sensitivity of the catheter to be detected.
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| CN201911191176.9A CN110849920B (en) | 2019-11-28 | 2019-11-28 | Preparation method and application of image quality measuring block for pipe weld seam radiographic testing |
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| CN201911191176.9A CN110849920B (en) | 2019-11-28 | 2019-11-28 | Preparation method and application of image quality measuring block for pipe weld seam radiographic testing |
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| CN110849920B CN110849920B (en) | 2021-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358670A (en) * | 2021-06-24 | 2021-09-07 | 华南理工大学 | Method, system, device and medium for measuring recognizable rate of two-line type image quality meter |
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