CN202119416U - Alignment mechanism used for convexity instrument - Google Patents
Alignment mechanism used for convexity instrument Download PDFInfo
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- CN202119416U CN202119416U CN2011201559715U CN201120155971U CN202119416U CN 202119416 U CN202119416 U CN 202119416U CN 2011201559715 U CN2011201559715 U CN 2011201559715U CN 201120155971 U CN201120155971 U CN 201120155971U CN 202119416 U CN202119416 U CN 202119416U
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Abstract
The utility model relates to an alignment mechanism used for a convexity instrument, belonging to the application field of nuclear technology. The alignment mechanism comprises two sets of alignment devices having the same structure, wherein each alignment device comprises three levels of alignment devices, the first level alignment device to the third level alignment device are successively arranged along a radial direction of a gamma ray source, the first level alignment device comprises a first tungsten plate, the second alignment device comprises a second tungsten plate, a third tungsten plate, a fourth tungsten plate, a fifth tungsten plate, two installing plates, a base plate, a flat and a fixed block, the two installing plates are arranged on the flat, the two installing plates are respectively connected with the second tungsten plate, the third tungsten plate, the fourth tungsten plate and the fifth tungsten plate, the two installing plates are connected with the flat, the two installing plates are connected, the flat is connected with the base plate, a spring is arranged between the flat and the fixed block, the third level alignment device comprises a sixth tungsten plate, and the sixth tungsten plate is fixed via a jack screw. Via the three level alignments, a bundle of rays emitted by the gamma ray source becomes alignment bundle of rays, thereby solving the problem that the convexity instrument can not align the bundle of rays emitted by the gamma ray source and improving precision in product detection.
Description
Technical field
The utility model belongs to the Application of Nuclear Technology field, particularly detects the profile gauge of steel mill's steel rolling production-line steel band and uses collimation mechanism.
Background technology
Profile gauge is the key equipment that steel mill's strip material is produced and controlled, and the tranverse sectional thickness that can instantaneously measure steel band continuously distributes.The structure of profile gauge, as shown in Figure 1, agent structure is a C shape frame 11, and tested steel band 12 passes between the underarm from the C shape frame, and it is inner that radiographic source 13 is positioned at C shape frame upper arm, and radiographic source is two X-ray machines, and two X-ray machines are identical, and the segment distance of being separated by is placed; It is inner that ray detector 14 is positioned at C shape frame underarm, comprises two row's detector arrays, and every row's detector array distributes along straight line, comprises the individual independently ray detector unit of hundreds of.Respectively corresponding two X-ray machines of two row's detector arrays.
Two X-ray machines are launched X ray simultaneously downwards, pass tested steel band 12 from two radiogenic X ray from two different angles, utilize two row's detectors to measure the attenuation degree of two beam X-rays respectively.
This profile gauge is selected COMET MXR-225/02/FB type X-ray machine for use, and the beam that this X-ray machine sends is an oval cone-beam, and the solid angle of its major axis is 90 °, and the solid angle of minor axis is 30 °.And the solid angle of the relative X-ray machine of detector is merely 45 ° * 0.34 °, and therefore the beam angle much smaller than X-ray machine sends need collimate to the beam that X-ray machine sends through collimating apparatus.Collimating apparatus be not only for radiation safety the unnecessary alpha ray shield that sends by radiographic source, the more important thing is that unnecessary ray can produce a large amount of scattered rays, these scattered rays get into detectors, increase the noise of detector, reduce the measuring accuracy of equipment.Beam is collimated, and is the link that a lot of radionetric survey equipment all must be considered.
The parts that send ray in the X-ray machine are target spot, and target spot is not that the diameter in the ideal is a bit of 0, but the disk with certain diameter, the target spot diameter of this X-ray machine is 5.5mm.The problem that the imperfect point source of target spot brings is, the beam that is sent by circular target spot in the collimating apparatus back, can form three zones, shadow zone, penumbra region and complete shadow through behind the collimation.The shadow zone refers to zone that can't see target spot fully, and this no radiation exposure in zone is positioned at the outermost both sides; The penumbra region refers to the zone that can see the part target spot, and there is radiation exposure in this zone, but intensity is lower, and skewness, and this zone is between shadow zone and complete shadow; The complete shadow refers to the zone that can see whole target spots, and this zonal ray intensity is the strongest, and this zone that is evenly distributed is positioned at centre position.Therefore, the ray of complete shadow is beneficial to measurement most.As shown in Figure 2, ray 23 is tangent with the left side of target spot 21, joins with upper edge, the left side a point of the collimating slit of collimating apparatus 22; Ray 24 is tangent with the right side of target spot 21, joins with lower edge, the left side b point of collimating slit, and opposite side is symmetrical fully; Ray is behind collimation; C point left side and f point right side are the shadow zone, and cd zone and ef zone are the penumbra region, and the de zone is the complete shadow.
This profile gauge requirement, two row's detector arrays lay respectively in the complete shadow of its pairing X-ray machine.
Simultaneously; Because this profile gauge adopts two cover X-ray machine-combinations of detectors, and two X-ray machines shine (mode that some similar devices adopts staggered irradiation) simultaneously, so; Also require any row's detector array only by its pairing X-ray machine irradiation, and can not be by two outer X-ray machine irradiations.Because the solid angle of the relative X-ray machine of spacing between two row's detectors is merely 0.46 °, so collimation has proposed very high requirement.
To sum up, the requirement of this profile gauge collimation is: shield unnecessary X ray; Detector is covered by the complete shadow of the beam of its corresponding X-ray machine; Distinguish the ray that sends from two X-ray machines, make it only shine its pairing a certain row's detector array, and can not shine other row's detector array.
The utility model content
To be for a change existing profile gauge equipment lack the problem of the function that collimates to beam to the purpose of the utility model, designs a kind of profile gauge and use collimation mechanism, improved the precision that product detects.
The profile gauge that the utility model proposes is used collimation mechanism; It is characterized in that; This collimation mechanism comprises the collimator apparatus of two cover same structures, and every cover collimation device includes 3 grades of collimating apparatuss, arranges successively from the first order to third level collimating apparatus along a radiogenic directions of rays.
This first order collimating apparatus can comprise that the middle part has the first tungsten plate of rectangular opening, and vertical axis of symmetry of this rectangular opening overlaps with the major axis of the beam of radiographic source emission.
This second level collimating apparatus can comprise second, third, the 4th, the 5th block of tungsten plate; First installing plate, centre have second installing plate of half slot, have the base plate of guide rail and central rectangular aperture; Be installed in the flat board that has central rectangular aperture on the base plate; This dull and stereotyped central rectangular aperture is corresponding with the central rectangular aperture position of base plate, is installed in the fixed block on the base plate, is provided with spring between this flat board and the fixed block; This first, second installing plate symmetry is erect and is placed dull and stereotyped central rectangular aperture both sides; This second tungsten plate, the 3rd tungsten plate level respectively place on the end face of first, second installing plate, and the 4th tungsten plate, the 5th tungsten plate are erect respectively on the medial surface that places first, second installing plate.
This third level collimating apparatus can comprise that the upper and lower end face of the 6th tungsten plate, the 6th tungsten plate both sides fixed by jackscrew respectively.
Through behind these three grades of collimations, by beam effectively shielding of quilt on long axis direction of radiographic source emission.On the short-axis direction; Be collimated into and be the collimation beam of irradiation detector array of along straight line arranging corresponding only with it; And this beam all is positioned at the complete shadow of radiographic source target spot, and can not shine the detector array that another arranges parallel placement, and the radiogenic relatively solid angle of spacing between two row's detector arrays is merely 0.46 °; The problem that the beam that profile gauge equipment is launched radiographic source lacks the function that collimates is able to solve, and has improved the precision that product detects.
Description of drawings
Fig. 1 is the profile gauge structural representation.
Fig. 2 is ray collimator complete shadow, penumbra region synoptic diagram.
Fig. 3 is the collimation mechanism principle schematic of the utility model.
Fig. 4 is the first order collimator structure synoptic diagram of the utility model embodiment.
Fig. 5 a, 5b, 5c are the second level collimator structure synoptic diagram of the utility model embodiment;
Fig. 6 is the third level collimator structure synoptic diagram of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further explanation.
Embodiment
The profile gauge that the utility model is directed against adopts the combination of two cover radiographic source-detector arrays, and is as shown in Figure 1, is directions X with the direction perpendicular to C shape frame upper arm end face 16, is the Y direction with the direction perpendicular to C shape frame side 17.As shown in Figure 3 at directions X, among the figure, the placement of on the same rectilinear direction of directions X, being separated by of two X-ray machines, detector array is arranged along directions X, and two row's detector arrays 35,36 are parallel.
The X-ray beam that X-ray machine sends is an oval cone-beam, and major axis is along directions X, and minor axis is along the Y direction, and angle is 90 ° * 30 °.On X, Y direction, the solid angle of the relative X-ray machine of detector array is 45 ° * 0.34 °, and is as shown in Figure 3 equally, and on the Y direction, the angle of two row's detector arrays 35, the relative X-ray machine of distance between 36 is 0.46 °.The beam that the requirement X-ray machine sends only is radiated at its corresponding detector array and lists behind collimation, lists and can not be radiated at other row's detector array.And because the target spot of X-ray machine has certain diameter (5.5mm), ray can form complete shadow and penumbra region behind collimation, also requires corresponding detector array all to be positioned at the complete shadow.
As shown in Figure 3, X-ray machine 31, detector array 36 are combination 1, and combination 2 and its are with face 38 symmetric arrangement (not marking among the figure).Corresponding with it, collimation mechanism also has two identical covers, with face 38 symmetric arrangement.The 1st grade of collimating apparatus 32 shown in Fig. 3, the 2nd grade of collimating apparatus 33,3rd level collimating apparatus 34 are and combination 1 a corresponding cover collimation mechanism.
This profile gauge is made up of the collimation mechanism of two cover same structures with collimation mechanism, and every suit collimation mechanism includes 3 grades of collimating apparatuss, from the first order to the third level, arranges successively along a radiogenic directions of rays.
The structure of said first order collimating apparatus, as shown in Figure 4, be that a thickness is the first tungsten plate of 10mm, this thickness is enough to stop the ray that X-ray machine sends fully.The rectangular opening that vertically has 15 * 60mm 41 of the first tungsten plate, during installation, vertical axis of symmetry of this rectangular opening 41 overlaps with the major axis of X-ray machine beam.From then on beam passes through in the hole, and all the other rays are stopped fully.Behind this grade collimation, 90 ° * 30 ° beam is reduced to 50 ° * 10 °.And the required angle of directions X is 45 °, no longer beam is made further collimation on directions X.It is fixing that the relative position of this grade collimation and X-ray machine keeps.
The structure of said second level collimating apparatus, shown in Fig. 5 a, 5b, 5c, comprise thickness be 10mm second, third, the 4th, the 5th block of tungsten plate 51,52,53,54; Vertically there is first installing plate 55 of through hole at the middle part of both sides; Second installing plate 56 that threaded hole is arranged on the position of the through hole on corresponding first installing plate has the base plate 513 of guide rail and central rectangular aperture, has the flat board 57 of central rectangular aperture; The central rectangular aperture of this flat board 57 is corresponding with the position of the central rectangular aperture of base plate 513; Be installed in the fixed block 518 on base plate 513 right sides, shown in Fig. 5 b, be installed in the left side of base plate 513 and withstand first jackscrew 519 of dull and stereotyped side; Be installed in dull and stereotyped 57 left sides and withstand second jackscrew 520 of the first installing plate side, shown in Fig. 5 a; In these base plate 513 central rectangular aperture side longitudinally, also have slotted hole 516, also have slotted hole 59 in the vertical both sides of the central rectangular aperture of this flat board 57, shown in Fig. 5 c; These first, second installing plate 55,56 symmetries are erect and are placed dull and stereotyped 57 central rectangular aperture both sides longitudinally; Between this first, second installing plate 55,56 and dull and stereotyped 57; Connect through the bolt 58 that passes slotted hole 59 respectively; This first, second installing plate 55, between 56; Bolt 510 through passing through hole and the bolt hole on second installing plate 56 on first installing plate 55 connects, and is installed with compression spring 511 on this bolt 510, and the two ends of this compression spring 511 withstand on respectively on the medial surface of first, second installing plate 55,56; This flat board 57 places on the base plate 513, and can between this flat board 57 and the base plate 513, connect through the bolt 515 that passes slotted hole 516 in base plate 513 upper edge guide rail translations; This second tungsten plate 51, the 3rd tungsten plate 52 level respectively place on the end face of first, second installing plate 55,56; This second tungsten plate 51, the 3rd tungsten plate 52 are used for stopping the ray that short-axis direction is unnecessary; The 4th tungsten plate 53, the 5th tungsten plate 54 are erect on the medial surface that places first, second installing plate 55,56 respectively; Form among Fig. 3 33 between the 4th tungsten plate 53, the 5th tungsten plate 54, the collimating slit of the adjustable width between 37, this collimating slit is along directions X; Four springs 517 are arranged between this flat board 57 and the fixed block 518, the two ends of these four springs 517 withstand on respectively dull and stereotyped 57 with the medial surface of fixed block 518 on, with so that flat board can move horizontally left at base plate upper edge guide rail, shown in Fig. 5 b; Be equipped with straight pin 512 on dull and stereotyped 57, second installing plate 56 that longitudinal middle part has half slot can rotate around this straight pin.
Position, width and the angle of the collimating slit between the 4th tungsten plate 53, the 5th tungsten plate 54 can be regulated accurately.After guaranteeing to be installed on the equipment to whole second level collimation, still can easily regulate, all regulatory functions are all carried out in front shown in Fig. 5 a and bottom surface.Behind this grade of beam process collimation, its complete shadow covers detector array 36 just, and is as shown in Figure 3.
Realize by rotation first jackscrew 519 position of collimating slit.Dextrorotation first jackscrew 519 makes dull and stereotyped 57 to drive collimating slit to 514 translations of forward position guide rail; Left-handed 519, dull and stereotyped 57 drive collimating slit steps back under the pressure of spring 517.Jackscrew pitch is 1mm, and the jackscrew corresponding dull and stereotyped 57 translation 1mm that rotate a circle therefore can be through the anglec of rotation of control jackscrew, accurately control dull and stereotyped 57 position of collimating slit just.Following adjusting all similarly.
The width of collimating slit leans on two bolts 510 to regulate.Two bolts adjusted in concert.Dextrorotation two bolts, first installing plate 55, second installing plate 56 are furthered the reduced width of collimating slit by bolt; Left-handed two bolts, first installing plate 55, second installing plate 56 open under the pressure of two springs 511, and the width of collimating slit increases.
The angle of collimating slit leans on two jackscrews 520 to regulate.This second jackscrew 520 by about two jackscrews form, this two jackscrew phases counter regulation, dextrorotation one of them, then left-handed another one, the anglec of rotation is identical.It is as a whole around straight pin 512 rotations that the installing plate 55 of winning, second installing plate 56 are done, and the angle of collimating slit also changes thereupon.
The position of collimating slit, width and angular adjustment under base plate 513, are tightened two bolts 515 after accomplishing, and make flat board 57 fixing with base plate 513; Tighten four bolts 58, make first installing plate 55, second installing plate 56 fixing with dull and stereotyped 57.
Described third level collimating apparatus, as shown in Figure 6, comprise that thickness is the identical support component of the 6th tungsten plate 61 and tungsten plate 61 two ends of 10mm, the both sides of the 6th tungsten plate 61 are fixing by jackscrew 62,63 respectively.Can accurately regulate respectively with fixing the position at the 6th tungsten plate 61 two ends through regulating jackscrew, and then can regulate accurately the position of the 6th tungsten plate 61 and angle in the horizontal direction.The effect of third level collimating apparatus, as shown in Figure 3, stop by 31 send, behind 33 collimations, the penumbra region of directive detector array 35.
Through behind these three grades of collimations, the beam that is sent by X-ray machine is effectively shielded on long axis direction.On the short-axis direction; Be collimated into and be the collimation beam of irradiation detector array of along straight line arranging corresponding only with it; And this beam all is positioned at the complete shadow of X-ray machine target spot, and this collimation beam can not shine the only detector array of 0.46 ° parallel placement at interval of another row.
Claims (4)
1. a profile gauge is used collimation mechanism, it is characterized in that, this collimation mechanism comprises the collimator apparatus of two cover same structures, and every cover collimation device includes 3 grades of collimating apparatuss, arranges successively from the first order to third level collimating apparatus along a radiogenic directions of rays.
2. profile gauge as claimed in claim 1 is used collimation mechanism, it is characterized in that, this first order collimating apparatus comprises that the middle part has the first tungsten plate of rectangular opening, and vertical axis of symmetry of this rectangular opening overlaps with the major axis of the beam of radiographic source emission.
3. profile gauge as claimed in claim 1 is used collimation mechanism, it is characterized in that, this second level collimating apparatus comprise second, third, the 4th, the 5th block of tungsten plate; First installing plate, centre have second installing plate of half slot, have the base plate of guide rail and central rectangular aperture; Be installed in the flat board that has central rectangular aperture on the base plate; This dull and stereotyped central rectangular aperture is corresponding with the central rectangular aperture position of base plate, is installed in the fixed block on the base plate, is provided with spring between this flat board and the fixed block; This first, second installing plate symmetry is erect the both sides that place dull and stereotyped central rectangular aperture; This second tungsten plate, the 3rd tungsten plate level respectively place on the end face of first, second installing plate, and the 4th tungsten plate, the 5th tungsten plate are erect respectively on the medial surface that places first, second installing plate.
4. profile gauge as claimed in claim 1 is used collimation mechanism, it is characterized in that, this third level collimating apparatus comprises that the upper and lower end face of the 6th tungsten plate, the 6th tungsten plate both sides fixed by jackscrew respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201559715U CN202119416U (en) | 2011-05-16 | 2011-05-16 | Alignment mechanism used for convexity instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201559715U CN202119416U (en) | 2011-05-16 | 2011-05-16 | Alignment mechanism used for convexity instrument |
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| Publication Number | Publication Date |
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| CN202119416U true CN202119416U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201559715U Expired - Lifetime CN202119416U (en) | 2011-05-16 | 2011-05-16 | Alignment mechanism used for convexity instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284513A (en) * | 2011-05-16 | 2011-12-21 | 清华大学 | Collimating mechanism for convexity instrument |
| CN104936366A (en) * | 2015-06-03 | 2015-09-23 | 合肥泰禾光电科技股份有限公司 | Optical path restriction slit structure for preventing X ray leakage and improving imaging quality |
-
2011
- 2011-05-16 CN CN2011201559715U patent/CN202119416U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284513A (en) * | 2011-05-16 | 2011-12-21 | 清华大学 | Collimating mechanism for convexity instrument |
| CN104936366A (en) * | 2015-06-03 | 2015-09-23 | 合肥泰禾光电科技股份有限公司 | Optical path restriction slit structure for preventing X ray leakage and improving imaging quality |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |