A kind of radioactive source fixed support for large-scale tubular weldment radiographic inspection
Technical field
What the present invention relates to is the technology of tubular weldment radiographic inspection, particularly a kind of radioactive source fixed support for large-scale tubular weldment radiographic inspection.
Background technology
When at present large-scale tubular weldment being carried out radiographic inspection, generally adopt pressure vessel to use conduit to send source flaw detection mode.Concrete mode is by conduit radioactive source to be sent to the probe position to carry out exposure operation, need guarantee during the single wall transillumination that the radioactive source probe is positioned at the weldment shaft core position.
But when adopting this mode that large-scale tubular weldment is carried out radiographic inspection now, position for fixing radioactive source probe, usually only use aids such as waddy, rope to carry out simple fixation, do not have regular specialized apparatus that the correct position that radioactive source is popped one's head in is set, be difficult to ensure the accuracy and reliability of flaw detection operation.
Summary of the invention
The present invention for large-scale tubular weldment radiographic inspection provides the radioactive source fixed support that a kind of science is reliable, be simple and easy to usefulness, is convenient to find simply fast the position in weldment axle center for overcoming above-mentioned technical matters when source conduit probe positions is set; Simultaneously, a kind of radioactive source fixed support of specification is applicable to the different weldments of big caliber scope.
For achieving the above object, the technical scheme of employing is as follows:
A kind of fixing support of radioactive source probe during for large-scale tubular weldment radiographic inspection, it is characterized in that: comprise two carrier units that structure is identical, each carrier unit comprises trailing arm and transverse arm, one end of trailing arm is fixedlyed connected perpendicular to the midline position of transverse arm and with transverse arm, be that trailing arm and transverse arm are the inverted T shape arm, two ends of the other end of trailing arm and transverse arm are provided with homoaxial sleeve, and sleeve is all vertical with transverse arm with trailing arm; Two carrier units by transverse arm one end sleeve and the same pipe fitting of sleeve socket of the other end of another transverse arm form cradle head, make to form angle between the trailing arm, then the same pipe fitting of the sleeve socket of two trailing arms is formed support; Pipe fitting in the described trailing arm sleeve is used for placing the source conduit of radioactive source probe, thereby fixedly radioactive source is popped one's head in.
The sleeve of the transverse arm of described support all is positioned on the inwall of tubular weldment, and the pipe fitting of the sleeve socket of trailing arm is the shaft core position of weldment, and namely the radioactive source probe is arranged in the shaft core position of tubular weldment.
Described trailing arm is telescopic structure, can regulate the length of trailing arm according to different weldment internal diameters.
The bottom of described sleeve is provided with roller, can make the light translation of support; Roller is provided with arrestment mechanism, and pair roller was braked to guarantee can not occur unexpected mobile after support moved to correct position.
The barrel dliameter of the sleeve of described transverse arm is all identical, and the barrel dliameter of the sleeve of trailing arm is all identical.In order to simplify the production technology of this support, the barrel dliameter of sleeve all can be arranged to identical barrel dliameter.
When forming support by two identical carrier units of structure, be provided with cradle head between two carrier units, by cradle head carrier unit relatively rotated around same axis.
This structure Design principle is: its intersection point of the perpendicular bisector of any two uneven strings must be the center of circle on the circle.According to this principle, extend two trailing arms find weldment when the axial projection of weldment is intersected axle center, according to the simple plane geometrical principle, just can easily the radioactive source probe be arranged in the shaft core position of tubular weldment.Fix after backing positions, trailing arm elongation configure, then can use the pipe fitting of suitable external diameter that the relevant sleeve unification is passed, guarantee integrally-built stable.
The present invention forms supports by the identical carrier units of two structures, two carrier units in the transverse arm end wherein a pair of sleeve position be provided with cradle head and can relatively rotate, the angle that forms between Unit two is variable to adapt to the inwall of different inner diameters weldment.
Beneficial effect of the present invention is as follows:
The present invention is convenient to find the position in cartridge type weldment axle center quickly and easily when source conduit probe positions is set; Simultaneously, be applicable to the different weldments of big caliber scope.
Description of drawings
Fig. 1 is structural representation of the present invention
Arrangement synoptic diagram when Fig. 2 uses for the present invention
Plan structure synoptic diagram when Fig. 3 is of the present invention for using according to Fig. 2
Wherein, Reference numeral is: 1-6 is sleeve, and 7 is weldment, and 8 is pipe fitting, and 9 is the source conduit, and 10 is pipe fitting, and 11-12 is support, and A, C are transverse arm, and B, D are trailing arm.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
Structure of the present invention when large-scale relatively tubular weldment radiographic inspection, is fixed in the radioactive source probe with the present invention as shown in Figure 1.Structure of the present invention is as follows: this support comprises two carrier units that structure is identical, each carrier unit comprises trailing arm B or D and transverse arm A or C, the end of trailing arm B is fixedlyed connected perpendicular to the midline position of transverse arm A and with transverse arm A, perhaps the end of trailing arm D is fixedlyed connected perpendicular to the midline position of transverse arm C and with transverse arm C, be that trailing arm B and transverse arm A are the inverted T shape arm, or trailing arm D and transverse arm C are the inverted T shape arm; Two ends of the other end of trailing arm B and the A of transverse arm are provided with homoaxial sleeve 1,2,3, sleeve 1,2,3 is all vertical with transverse arm A with trailing arm B, in like manner, two ends of the other end of trailing arm D and the C of transverse arm are provided with homoaxial sleeve 4,5,6, and sleeve 4,5,6 is all vertical with transverse arm C with trailing arm D.
Two carrier units by transverse arm A sleeve 2 and the same pipe fitting 10 of sleeve 4 sockets of the other end of another transverse arm C form cradle heads, make to form angle between trailing arm B and the D that sleeve 3 and the same pipe fitting 8 of 6 sockets with two trailing arm B and D forms support then; Pipe fitting 8 in the described trailing arm sleeve 3 and 6 is used for placing the source conduit 9 of radioactive source probe, thereby fixedly radioactive source is popped one's head in.
The sleeve 1,2,4,5 of transverse arm A, the C of described support all is positioned on the inwall of tubular weldment 7, and the sleeve 3 of trailing arm B, D, the pipe fitting of 6 sockets 8 are the shaft core position of weldment 7, and namely the radioactive source probe is arranged in the shaft core position of tubular weldment 7.This supporting structure is simple and reliable, and is convenient to use, and extensively is suitable for for the different large-scale tubular weldment of internal diameter.
Described trailing arm B, D are telescopic structure, can regulate the length of trailing arm B, D according to different weldment 7 internal diameters.
Described sleeve 1,2,4,5 bottom are provided with roller, can make the light translation of support; Roller is provided with arrestment mechanism, and pair roller was braked to guarantee can not occur unexpected mobile after support moved to correct position.
The sleeve 1,2,4 of described transverse arm A, C, 5 barrel dliameter are all identical, and the sleeve 3 of trailing arm B, D, 6 barrel dliameter are all identical.In order to simplify the production technology of this support, the barrel dliameter of sleeve all can be arranged to identical barrel dliameter.
When forming support by two identical carrier units of structure, the transverse arm end wherein is provided with cradle head in a pair of sleeve position between two carrier units, by cradle head carrier unit is relatively rotated, the angle that forms between the two stands unit is variable to adapt to the inwall of different inner diameters weldment.Therefore, in the time of installation, the pipe fitting of transverse arm sleeve can be installed earlier, and then the pipe fitting of trailing arm sleeve is installed, form cradle head.
This structure Design principle is: its intersection point of the perpendicular bisector of any two uneven strings must be the center of circle on the circle.According to this principle, extend two trailing arm B, D find weldment 7 when weldment 7 axial projections are intersected axle center, according to the simple plane geometrical principle, just can easily the radioactive source probe be arranged in the shaft core position of tubular weldment 7.Fix after backing positions, trailing arm B, D elongation configure, then can use the pipe fitting 8 of suitable external diameter that the relevant sleeve unification is passed, guarantee integrally-built stable.
Arrangement when the present invention uses is shown in Fig. 2-3.During work, earlier support 11 is arranged in by direction as shown near the weld seam of large-scale weldment 7, all rollers all contact with weldment 7 inwalls, and namely support relies on angle self-adaptation weldment 7 internal diameters that form between the two stands unit.Regulate the length of support two trailing arm B and D simultaneously, until the elongation of two trailing arm B and D top sleeve 3 and 6 locking trailing arm B and D when the axial projection of weldment 7 is overlapping, and make these sleeves 3 and 6 coaxial with weldment 7.For guaranteeing positioning stablity, arrange another support 12 by same order near above-mentioned support 11, and pass the sleeve at carrier unit cradle head place, each sleeve that pipe fitting 8 passes the trailing arm top with pipe fitting 10, to strengthen integrally-built stability (can increase and decrease the quantity of support pair according to actual conditions).This moment source conduit 9 being stretched into pipe fitting 8 stretches out from front end until probe.Because support is furnished with roller, promote holder combination and can adjust integral position, also the overhang of the relative pipe fitting of fine-tuning probe (8) guarantees that finally probe unobstructedly is positioned on the weldment section of weld joint, and the locking roller is to prevent unexpected generation of moving.So far radioactive source probe location finishes, and can carry out radiographic inspection work.