CN204130194U - A kind of electron beam diffusion cross section trimming device - Google Patents
A kind of electron beam diffusion cross section trimming device Download PDFInfo
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- CN204130194U CN204130194U CN201420528269.2U CN201420528269U CN204130194U CN 204130194 U CN204130194 U CN 204130194U CN 201420528269 U CN201420528269 U CN 201420528269U CN 204130194 U CN204130194 U CN 204130194U
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Abstract
The utility model provides a kind of electron beam diffusion cross section trimming device, is specially: comprise two groups of permanent magnets, and electron beam is diffused as approximate ellipsoidal by the magnetic field of first group of permanent magnet formation; The magnetic field of second group of permanent magnet formation is carried out finishing to electron beam group edge and is formed approximate rectangular; To transpose bindiny mechanism by operating four longitudinal directions, the upper and lower yoke of first group of permanent magnet is moved towards the central synchronous between them, the electron beam of pairing approximation ellipse carries out longitudinal compression first, and the upper and lower yoke of second group of permanent magnet is moved towards the central synchronous between them, the electron beam longitudinal compression again of pairing approximation rectangle, until electron beam group longitudinal size is approached to 80mm by compression.The utility model rationally compresses the electron beam group longitudinal size after diffusion, has both ensured irradiation evenness and irradiation efficiency optimum, has maintained again in the existing limited range retouching box titanium window.
Description
Technical field
The utility model is applied to electron beam irradiation processing technique field, is specifically related to a kind of electron beam diffusion cross section trimming device.
Background technology
Utilize nuclear radiation and matter interaction, illuminated material produces ionization or excites, discharge orbital electron, form free radical, its physical property or chemical composition are changed, become desired novel substance, or make biosome (microorganism etc.) be subject to expendable loss or destruction, reach the object of irradiation sterilization.Based on method of radiating, product is processed, improve properties of product, be called RADIATION PROCESSING.RADIATION PROCESSING is different from traditional machining or hot-working, and high energy electron or gamma-rays have very strong penetration capacity, can be deep into material inside, the aspect of molecule is carried out " processing ", is actually nanofabrication technique.Processor is the intermediate of the high activity of high-energy ray and its initiation, is not the thermal motion of molecule, does not substantially produce thermal effect.Therefore, RADIATION PROCESSING energy consumption is low, noresidue, less problem of environmental pollution, and RADIATION PROCESSING is more and more applied in industry, agricultural, medical science, biology, environmental protection.
Radiation source at present for RADIATION PROCESSING has two classes, a class be radioactive isotope as cobalt source, another kind of is that charged particle accelerator is as electron accelerator.The advantage of electron accelerator is energy-controllable; Electron beam basic role is in illuminated product, and utilization ratio is high; There is no the process problem of Spent Radioactive Sources; Not power consumption during shutdown; In whole production run except a small amount of ozone of generation, contaminated environment hardly.Therefore electron accelerator has the trend that more users adopt in RADIATION PROCESSING.
After accelerating from electron accelerator, Electron Beam spot diameter is usually at about 1cm, electronic beam current power is substantially between 10-50 kilowatt, also the electronic beam current more than 100 kilowatts is had, beam energy concentrates on this little areal extent, RADIATION PROCESSING product can not be directly used in, concentrated energy easily cause damaged products or exposure dose uneven.Therefore, after electron beam leaves accelerator, before being radiated object, an electron beam de-registration apparatus must be installed.All adopt sweeping magnet method at present, magnet is by a sawtooth wave Power supply, the line scanning be similar in televisor is laterally being swept out electron beam, bundle lower device drives irradiated object longitudinally at the uniform velocity passing through electron beam, frame scan effect in suitable televisor, make as far as possible to be received uniform dosage by irradiated object, substantially solve above-mentioned contradiction.Fig. 1 (a) is 0.5MeV energy, 50mA flows strong accelerator sweeping magnet structural drawing, and Fig. 1 (b) is scanning theory schematic diagram.
But electron beam scanning pattern exists following shortcoming: it not only will consume electric energy, be also difficult to make large scale irregular part product be subject to Uniform Irradiation.In addition, scanning process unavoidably produces flyback, adds transmission speed and sweep frequency mismate, likely causes the uneven of illuminated object acceptable dose.
The Chinese patent " a kind of electron beam disperser for RADIATION PROCESSING " applied for before applicant, grant number: ZL 201010532758.1, propose theoretically and solve the in-problem technical scheme of electron beam scanning pattern, it is paid close attention to does not need to use driven by power, electron beam is evenly scattered and is irradiated on radiation exposed product, first group of permanent magnet effect is specifically utilized to be evenly scattered by electron beam, second group of permanent magnet is that the periphery of the electron beam scattered is carried out shaping to realize, but the program is applied to and also there is following two problems actual time:
(1) applicant finds that the electron beam group that above-mentioned patent is formed is evenly distributed in the scope of 1000mm (length) * 400mm (wide).But in current practical application, all electron beams all adopt scan mode, electron beam longitudinal size after scanning is general all at about 10mm, in order to make electron beam broadening, improve irradiation quality, addition of longitudinal scanning, but also can only reach 30mm, the longitudinal size of the scan box titanium window therefore used at present is generally within 100mm, but the longitudinal width of the scan box of above-mentioned patent " a kind of electron beam disperser for RADIATION PROCESSING " correspondence is greater than 400mm, if adopt the program, bundle lower device must carry out large scrap build, hinder it to apply in existing RADIATION PROCESSING is produced.
(2) electron beam group requirement be uniformly distributed, with avoid concentration of energy easily cause damaged products or exposure dose uneven.The magnetic field that the electron beam group of above-mentioned patent is consisted of magnetic pole laterally defocuses longitudinal focusing thus scatters, only the homogeneity of guaranteed magnetic field's regularity guarantee electron beam group, but described in how ensureing that magnetic field's regularity do not have in above-mentioned patent.
Utility model content
In order to overcome the defect of the existing electron beam disperser for RADIATION PROCESSING, the utility model provides a kind of electron beam diffusion cross section trimming device, its object is to, the longitudinal size of the electron beam group after diffusion is rationally compressed, its longitudinal size is made to approach 80mm, both ensured irradiation evenness and irradiation efficiency optimum, maintained again in the existing limited range retouching box titanium window.
A kind of electron beam diffusion cross section trimming device, comprise and comprise two groups of permanent magnets, first group of permanent magnet comprises four magnetic poles, these four magnetic poles are fixed in upper and lower yoke in pairs, relatively and adjacent pole polarity contrary, electron beam in longitudinal stretching, horizontal compression, makes electron beam be diffused as approximate ellipsoidal by the magnetic field that these four magnetic poles are formed; Second group of permanent magnet includes eight magnetic poles, and eight magnetic poles are fixed in the yoke of upper and lower, left and right in pairs, relatively and adjacent pole polarity contrary, it is approximate rectangular that finishing formation is carried out to the electron beam group edge scattered in the magnetic field that these eight magnetic poles are formed;
Also comprise four longitudinal directions to transpose bindiny mechanism, first group of permanent magnet upper, lower yoke two ends are installed on a left side respectively by the bindiny mechanism that longitudinally transposes, in right yoke, second group of permanent magnet upper, lower yoke two ends are installed on a left side respectively by the bindiny mechanism that longitudinally transposes, in right yoke, to transpose bindiny mechanism by operating four longitudinal directions, make the upper of first group of permanent magnet, lower yoke moves towards the central synchronous between them, the electron beam of pairing approximation ellipse carries out longitudinal compression first, and make the upper of second group of permanent magnet, lower yoke moves towards the central synchronous between them, the electron beam longitudinal compression again of pairing approximation rectangle, longitudinal compression operation is first until electron beam group longitudinal size is approached to 80mm by compression repeatedly.
Further, also comprising the lip block be placed between homonymy yoke adjacent pole, for preventing two adjacent poles from attracting each other on the contrary due to polarity, causing magnetic pole to middle deviation angle.
Further, also comprise:
Four screw rods that four angle points be connected to form for four yokes of four angle points four yokes of first group of permanent magnet being connected to form and second group of permanent magnet connect one to one, wherein one group of relative screw rod of permanent magnet is fixed, another group permanent magnet can move up and down along screw rod, adjusts spacing between one group of permanent magnet and second group of permanent magnet with this; And for fixing the double nut latch mechanism of spacing between first group of permanent magnet and second group of permanent magnet.
Further, described yoke surfaces is processed with the mounting groove with magnetic pole face size interference fit, for placing magnetic pole, tentatively fixing to it to the suction of yoke by magnetic pole itself, and by the mode of aluminium alloy fixed mount, it is fastening further.
Further, the pad be positioned between mounting groove and magnetic pole is also comprised.
Further, the implementation of described longitudinally positioning bindiny mechanism is: in left or right yoke, offer upper and lower strip through hole, for placing the end of upper and lower yoke, fix yoke in through hole by screw, through-hole wall is marked with scale to determine upper and lower yoke position by vernier caliper.
Technique effect of the present utility model is embodied in:
The utility model adopts that two groups of permanent magnets evenly scatter to electron beam, shaping longitudinal compression, electron beam longitudinal size is made to approach 80mm, ensure irradiation evenness and irradiation efficiency optimum on the one hand, maintain in the existing limited range retouching box titanium window on the other hand, when not changing existing irradiation accelerator bundle lower device structure, the existing general electron beam scanning equipment of direct replacement, makes electron beam process equip upgrading.Whole device does not have power consumption, and structure is simple, cost is low, easy for installation, and practicality is good.
The non-active electron beam diffusion facilities of application the utility model substitutes the electronic beam-steering device extensively adopted at present, not only complete in scanning power supply, saves energy, and eliminate the fringe cost and low operational efficiency that power-supply device fault brings, improve the probability that titanium film is impaired simultaneously, fundamentally eliminate beam return, ensure that the quality of electron beam process product.
Accompanying drawing explanation
Fig. 1 is sweeping magnet schematic diagram, and Fig. 1 (a) is sweeping magnet structural drawing, and Fig. 1 (b) is sweeping magnet principle schematic.
Fig. 2 is the utility model one-piece construction figure, Fig. 2 (a) is front elevation, and Fig. 2 (b) is side view.
Fig. 3 is the utility model Split type structure figure, Fig. 3 (a) is first group of permanent magnet front elevation, Fig. 3 (b) is first group of permanent magnet side view, and Fig. 3 (c) is second group of permanent magnet front elevation, and Fig. 3 (d) is second group of permanent magnet side view.
Fig. 4 is the utility model magnetic pole yoke assembly structure schematic diagram.
Fig. 5 is the utility model longitudinally positioning syndeton schematic diagram.
Fig. 6 is the utility model two groups of magnet spacing adjustment schematic diagram.
Fig. 7 is the utility model accelerator actual installation structural representation, and Fig. 7 (a) is front view, and Fig. 7 (b) is side view.
Fig. 8 is the utility model when being applied to 0.5MeV accelerator, after electronics is spread by permanent magnet, and the distribution schematic diagram on radiating object.
Fig. 9 is the utility model when being applied to 0.3MeV accelerator, after electronics is spread by permanent magnet, and the distribution schematic diagram on radiating object.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each embodiment of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
The utility model has carried out improving to realize the utility model technical purpose at the existing electron beam disperser for RADIATION PROCESSING.The existing electron beam disperser for RADIATION PROCESSING comprises and comprises two groups of permanent magnets, first group of permanent magnet I includes four magnetic poles 15,16,17,18, these four magnetic poles are fixed on upper and lower yoke 12 in pairs, on 14, relatively and adjacent pole polarity contrary, the effect of this group magnet is at longitudinal stretching by electron beam, horizontal compression, makes electron beam be diffused as approximate ellipsoidal; Second group of permanent magnet II includes eight magnetic poles 25 ~ 32, eight magnetic poles are fixed in the yoke of upper and lower, left and right in pairs, relatively and adjacent pole polarity contrary, the magnetic field that these eight magnetic poles are formed is repaired the electron beam group edge scattered, and is formed approximate rectangular.
As described in the utility model instructions background technology part, the longitudinal width of scan box corresponding to electron beam that above-mentioned existing electron beam disperser obtains group is greater than 400mm, can not adapt to longitudinal size within the 100mm of the scan box titanium window used at present.Therefore, need to compress the longitudinal size of electron beam group.But then, longitudinal size, owing to limiting by scanning power supply, maximumly can only be swept to 35mm by the sweeping magnet used at present, larger words will have a huge impact scanning uniformity, so in a particular application, should promote final irradiation width as far as possible.Consider existing scan box size and titanium film structural factor, the longitudinal size locked electron beam is rolled into a ball is compressed to 80mm, maximizedly can utilize titanium window ara like this, and not need to change existing accelerator facility, simultaneously irradiation evenness and irradiation efficiency optimum.
In order to realize compressing the longitudinal size of electron beam group, the utility model utilizes first group of permanent magnet evenly to be scattered by electron beam, and carries out the primary longitudinal compression of bundle group; Utilize second group of permanent magnet that the periphery of the electron beam scattered is carried out shaping, and further second time longitudinal compression bundle group is approached to 80mm.Refer to Fig. 2 ~ 3, specific implementation is as follows:
Upper and lower yoke 12,14 two ends of first group of permanent magnet I are installed on left and right yoke 11 respectively by the bindiny mechanism that longitudinally transposes, and on 13, upper and lower, left and right yoke 11 ~ 14 surrounds a rectangle.First first group of permanent magnet is utilized evenly to be scattered by electron beam, then operate this bindiny mechanism, make upper and lower yoke close to rectangular centre with step-length, reduce the spacing between lower magnetic pole, longitudinally reduce magnetic field size, thus realize halved tie group first time longitudinal compression.
Upper and lower yoke 22,24 two ends of second group of permanent magnet II are installed on left and right yoke 21 respectively by the bindiny mechanism that longitudinally transposes, and on 23, upper and lower, left and right yoke 21 ~ 24 surrounds a rectangle.First the edge of magnetic field to ellipse utilizing second group of this group of permanent magnet magnet to be formed is repaired, and is formed approximate rectangular.Then operate this bindiny mechanism, make upper and lower yoke close to rectangular centre with step-length, reduce the spacing between lower magnetic pole, realize halved tie group second time longitudinal compression.
In the utility model, first group of permanent magnet coordinates with second group of permanent magnet, repeatedly regulates, and cooperation is until approach bundle group longitudinal compression to 80mm.The utility model is auxiliary based on first group of permanent magnet, second group of permanent magnet, cooperated longitudinal compression, this is because when electron beam group is by first group of permanent magnet, can longitudinally compressed, similar with convex lens principle, when electron beam group is diffused into second group of permanent magnet, its direction of motion and speed make it affect less by second group of permanent magnet.
Upper and lower yoke needs to move with step-length when rectangular centre is close, to ensure that electron beam group's moment is in compression set center, ensures that the bundle group of final diffusion reaches the effect of evenly diffusion.
The magnetic pole of the utility model device is installed and is regulated as shown in Figure 4, owing to there is magnetic pole processing, magnetize error, comprise yoke processing technology and alignment error, two magnetic poles of the same side lean on paracentral end face not in same level, the magnetic field causing permanent magnet to produce is heart skewness wherein, thus causing the diffusion of electron beam group uneven, final diffusion cross section does not reach the bad result of designing requirement.The utility model is processed and the mounting groove of magnetic pole face size interference fit in yoke, magnetic pole is placed in mounting groove, to the suction of yoke, it is tentatively fixing by magnetic pole itself, and by the mode of aluminium alloy fixed mount 35, it is fastening further, aluminium alloy fixed mount 35 is fixed in yoke by trip bolt 37.
The utility model also places the lip block 36 of irony between the adjacent pole of same yoke side, prevents two adjacent poles from attracting each other on the contrary due to polarity, causes magnetic pole to the problem of middle deviation angle, plays the technique effect ensureing the consistent centering in magnetic field.Because the magnetic force between magnet is very large, in the middle of the aluminium alloy fixed mount in magnetic pole outside, place the lip block 36 of irony, ensure magnetic pole can not because of suction deflection angle.
In order to the energy position of regulating magnet on vertical yoke direction, in square groove, add the soft iron pad 38 of the different-thickness such as 1mm, 2mm, 5mm, its material is identical with yoke.Because magnet and the suction of yoke own are also very large, the conveniently taking-up of magnet, needs machining screw through hole bottom square groove.
Figure 5 shows that the implementation of the longitudinal direction positioning bindiny mechanism of two groups of permanent magnets is: upper and lower yoke is as adjustment yoke, and left and right yoke is as fixing yoke.The through hole of the side's of processing strip in fixing yoke, is regulated the both sides of yoke can put into wherein, can be fixed the relative position of two yokes, unclamp screw during adjustment by screw, and the mobile yoke that regulates is to assigned address.By vernier caliper determination relative position, the precision of this regulative mode can reach 0.1mm, and both sides range of adjustment has 30mm.
As shown in Figure 6, four angle points of the utility model first group of magnet are connected by slide bar 39 one_to_one corresponding with four angle points of second group of magnet, specific implementation is: 41 is holder, it is fixed on second group of magnet, and be connected with first group of magnet by slide bar 39, bearing 40 play first group of magnet move after positioning action.
During use, ends of the earth iron platform is in stationary state, four pole iron platforms realize movement in parallel by four straight line slide bars 39, four slide bars 39 are fixed on the iron of the ends of the earth by four holders 41, four bearings 40 are installed at four angles of second group of permanent magnet, bearing holder (housing, cover) is connected on slide bar and also can freely up and down moves, there are two threaded rods 42 iron platform both sides, the ends of the earth, first group of permanent magnet is connected with second group of permanent magnet, threaded rod is fixed by double nut latch mechanism 43, to lock the distance between two groups of magnet.The precision of this regulative mode can reach 0.1mm, and range of adjustment has 50mm.There is extraordinary degree of regulation, reach and make electron beam roll into a ball the uniform technique effect of diffusion.
Fig. 7 is that the utility model is liking nation irradiation accelerator mounting structure figure, and the position, scanning room that the utility model directly can be positioned over accelerator is replaced sweeping magnet.The utility model is also positioned by a pack support 44 below longitudinal compression device.Support bottom is connected with the screw fastening of scan box 45, and upper surface is connected with magnet fastening equally, with the effect of the center superposition at the center and scan box of playing magnet, has the technique effect that degree of regulation is good, degree of stability is good.
With the effect of the utility model on 0.3MeV, 0.5MeV irradiation accelerator for example, illustrate effect of the present utility model.The bundle group diameter that 0.5MeV accelerator electron beam is rolled into a ball through the utility model is 15mm, electron beam is by after traditional sweeping magnet, comprise horizontal and vertical scanning, be of a size of after the scanning of titanium film place electron beam group: 650mm (length) * 35mm (wide).And this electron beam is by after the electron beam disperser with non-active cross section longitudinal compression function, the size being diffused in titanium window place of electron beam can reach 780mm (length) * 80mm (wide), compared to original scan mode, substantially increase width and the length of irradiation.
Fig. 8 Fig. 9 be respectively for the utility model be applied to 0.5MeV, 0.3MeV accelerator time, after electronics is spread by permanent magnet, distribution schematic diagram on radiating object, can find out, the utility model is by fine setting, the accelerator of different-energy can well be adapted to, electron beam group is diffused in 800mm (length) * 80mm (wide) scope.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. an electron beam diffusion cross section trimming device, comprise and comprise two groups of permanent magnets, first group of permanent magnet comprises four magnetic poles, these four magnetic poles are fixed in upper and lower yoke in pairs, relatively and adjacent pole polarity contrary, electron beam in longitudinal stretching, horizontal compression, makes electron beam be diffused as approximate ellipsoidal by the magnetic field that these four magnetic poles are formed; Second group of permanent magnet includes eight magnetic poles, and eight magnetic poles are fixed in the yoke of upper and lower, left and right in pairs, relatively and adjacent pole polarity contrary, it is approximate rectangular that finishing formation is carried out to the electron beam group edge scattered in the magnetic field that these eight magnetic poles are formed;
It is characterized in that, also comprise four longitudinal directions to transpose bindiny mechanism, first group of permanent magnet upper, lower yoke two ends are installed on a left side respectively by the bindiny mechanism that longitudinally transposes, in right yoke, second group of permanent magnet upper, lower yoke two ends are installed on a left side respectively by the bindiny mechanism that longitudinally transposes, in right yoke, to transpose bindiny mechanism by operating four longitudinal directions, make the upper of first group of permanent magnet, lower yoke moves towards the central synchronous between them, the electron beam of pairing approximation ellipse carries out longitudinal compression first, and make the upper of second group of permanent magnet, lower yoke moves towards the central synchronous between them, the electron beam longitudinal compression again of pairing approximation rectangle, longitudinal compression operation is until electron beam group longitudinal size is approached to 80mm by compression repeatedly.
2. a kind of electron beam diffusion cross section trimming device according to claim 1, it is characterized in that, also comprising the lip block be placed between homonymy yoke adjacent pole, for preventing two adjacent poles from attracting each other on the contrary due to polarity, causing magnetic pole to middle deviation angle.
3. a kind of electron beam diffusion cross section trimming device according to claim 1, is characterized in that, also comprise:
Four slide bars that four angle points be connected to form for four yokes of four angle points four yokes of first group of permanent magnet being connected to form and second group of permanent magnet connect one to one, wherein one group of relative slide bar of permanent magnet is fixed, another group permanent magnet can move up and down along slide bar, adjusts spacing between one group of permanent magnet and second group of permanent magnet with this; And
For fixing the double nut screw locking mechanism of spacing between first group of permanent magnet and second group of permanent magnet.
4. a kind of electron beam diffusion cross section trimming device according to claim 1 or 2 or 3, it is characterized in that, described yoke surfaces is processed with the mounting groove with magnetic pole face size interference fit, for placing magnetic pole, tentatively fixing to it to the suction of yoke by magnetic pole itself, and by the mode of aluminium alloy fixed mount, it is fastening further.
5. a kind of electron beam diffusion cross section trimming device according to claim 4, is characterized in that, also comprise the pad be positioned between mounting groove and magnetic pole.
6. a kind of electron beam diffusion cross section trimming device according to claim 1 or 2 or 3, it is characterized in that, the implementation of described longitudinally positioning bindiny mechanism is: in left or right yoke, offer upper and lower strip through hole, for placing the end of upper and lower yoke, fix yoke in through hole by screw, through-hole wall is marked with scale to determine upper and lower yoke position by vernier caliper.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420528269.2U CN204130194U (en) | 2014-09-15 | 2014-09-15 | A kind of electron beam diffusion cross section trimming device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420528269.2U CN204130194U (en) | 2014-09-15 | 2014-09-15 | A kind of electron beam diffusion cross section trimming device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637692A (en) * | 2019-01-23 | 2019-04-16 | 深圳铭杰医疗科技有限公司 | Track rectifier suitable for charged particle beam |
| CN114832124A (en) * | 2021-02-02 | 2022-08-02 | 湖州超群电子科技有限公司 | Electronic irradiation sterilization and disinfection system for open container and use method thereof |
-
2014
- 2014-09-15 CN CN201420528269.2U patent/CN204130194U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637692A (en) * | 2019-01-23 | 2019-04-16 | 深圳铭杰医疗科技有限公司 | Track rectifier suitable for charged particle beam |
| CN109637692B (en) * | 2019-01-23 | 2023-12-19 | 深圳铭杰医疗科技有限公司 | Trajectory corrector suitable for charged particle beam |
| CN114832124A (en) * | 2021-02-02 | 2022-08-02 | 湖州超群电子科技有限公司 | Electronic irradiation sterilization and disinfection system for open container and use method thereof |
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Granted publication date: 20150128 Termination date: 20150915 |
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| EXPY | Termination of patent right or utility model |