CN203934087U - The x ray generator that a kind of collimation can be modulated - Google Patents
The x ray generator that a kind of collimation can be modulated Download PDFInfo
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- CN203934087U CN203934087U CN201420301695.2U CN201420301695U CN203934087U CN 203934087 U CN203934087 U CN 203934087U CN 201420301695 U CN201420301695 U CN 201420301695U CN 203934087 U CN203934087 U CN 203934087U
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Abstract
The utility model discloses the x ray generator that a kind of collimation can be modulated, comprising: x-ray source assembly, comprises X-ray tube and the pre-collimator with negative electrode and anode; High pressure generator, is used between the negative electrode of X-ray tube and anode and provides high direct voltage with X ray excited bundle, and wherein, high pressure generator is arranged in the extension chamber of X-ray tube housing; Collimate modulating device, can be rotatably set in the outside of pre-collimator, for fan-shaped x-ray beam being modulated into continuous form of a stroke or a combination of strokes X-ray beam; And cooling device, can be assembled to independently X-ray tube, for the anode of cooling X-ray tube; Wherein, x-ray source assembly, high pressure generator, collimation modulating device and the heat pipe cooling device structure that becomes one.The x ray generator that a kind of collimation provided by the utility model can be modulated, compact conformation, contributes to miniaturization, modularization and the high efficiency design of safe examination system equipment.
Description
Technical field
The utility model belongs to x ray generator technical field, is specifically related to that a kind of collimation can be modulated, the x ray generator of single entities structure, is applicable to the field such as safety detection and medical research based on X-radiation imaging.
Background technology
Conventional x ray generator comprises high voltage source, X-ray tube and cooling device etc. conventionally, and each parts are relatively independent, are connected with pipeline by cable, and intermediate link is many, takes up room large.It is fan-shaped that the X-ray beam sending mostly is taper, or cannot modulate, or the numerous and diverse heaviness of modulation system.Especially aspect cooling heat dissipation, conventional circulation oil-cooling or the easy seepage of the radiating mode of recirculated water cooling, apply inconvenience.
At present safety check or Medical Devices are all at the future development towards miniaturization, modularization and high efficiency, in order to realize this target, have proposed that a kind of collimation can be modulated, the x ray generator of single entities structure.
Utility model content
The purpose of this utility model is intended to overcome at least one aspect of problems of the prior art and defect.
One of the purpose of this utility model is the demand in order to realize the miniaturization of X-radiation imaging device, modularization and high efficiency, provides that a kind of collimation can be modulated, the x ray generator of single entities structure.
At least one technical scheme of the present utility model is as follows, and the x ray generator that a kind of collimation can be modulated, comprising:
X-ray source assembly, comprises X-ray tube and the pre-collimator with negative electrode and anode;
High pressure generator, is used between the negative electrode of X-ray tube and anode and provides high direct voltage with X ray excited bundle, and wherein, described high pressure generator is arranged in the extension chamber of X-ray tube housing;
Collimate modulating device, can be rotatably set in the outside of pre-collimator, for fan-shaped x-ray beam being modulated into continuous form of a stroke or a combination of strokes X-ray beam; With
Cooling device, can be assembled to X-ray tube, independently for the anode of cooling X-ray tube;
Wherein, described x-ray source assembly, described high pressure generator, described collimation modulating device and the described heat pipe cooling device structure that becomes one.
According to the utility model, x-ray source assembly comprises the distolateral anode heat dissipation base of anode that is arranged in X-ray tube; End cap and the expansion eardrum distolateral with the negative electrode that is arranged in X-ray tube, wherein end cap and expansion eardrum coordinate to play the effect of leakproof and sealing.Preferably, anode heat dissipation base is embedded with temperature sensor and temperature switch.
According to a preferred embodiment of the present utility model, the anode heat dissipation base in x-ray source assembly has heat transfer contact face, cooling for contacting to realize with cooling device.Further, cooling device comprises heat pipe and heat-radiating substrate; Wherein, heat pipe is arranged on heat-radiating substrate, and heat-radiating substrate fully contacts with the heat transfer contact face of anode heat dissipation base by heat-conducting silicone grease.Alternatively, cooling device can only include heat pipe; Wherein, the directly clamping heat transfer contact face to anode heat dissipation base of heat pipe.Further, cooling device can also comprise the radiating fin being arranged on heat pipe and the quiet fan that is arranged on radiating fin top.Preferably, heat pipe can have U-shaped or L-type shape.
According to a preferred embodiment of the present utility model, X-ray tube and extension chamber are communicated with and inside is filled with insulating oil.Further, high pressure generator comprises the circumferential high-tension circuit, high-tension transformer and the filament transformer that are arranged in extension chamber; Wherein, circumferential high-tension circuit, high-tension transformer and filament transformer lay respectively in corresponding insulating resin plate, and are all arranged to be positioned at the side away from X-ray tube of corresponding insulating resin plate.Preferably, insulating resin plate is hollow and the peripheral annular insulating resin plate with the fixed pivot of multiple projections, and wherein the hollow space of annular insulating resin plate is suitable for the circulation of insulating oil.Further, high pressure generator also comprises the cage shape grid spacer of fixed and arranged in extension chamber, and insulating resin plate is positioned in extension chamber regularly by cage shape grid spacer.
According to a preferred embodiment of the present utility model, collimation modulating device comprises modulation rotation tungsten ring, with for driving modulation to turn round to realize the rotary drive mechanism of X ray pointwise continuous sweep around pre-collimator with rotating tungsten, rotary drive mechanism comprises the motor being fixed on mechanical fastening system; Be connected to the driving pulley of motor; Be connected to the driven pulley of modulation rotation tungsten ring; And be connected to the driving belt between driving pulley and driven pulley.Further, rotary drive mechanism can also comprise the stretching unit of the elasticity for regulating driving belt.
According to a preferred embodiment of the present utility model, x ray generator can also comprise mechanical fastening system, and wherein, x-ray source assembly, high pressure generator, collimation modulating device and cooling device are supported by mechanical fastening system.
According to a preferred embodiment of the present utility model, x ray generator can also comprise radiation protection structure, is jointly formed by the radiation protection layer, pre-collimator and the rotation tungsten ring that are arranged in X-ray tube and extension chamber.Preferably, pre-collimator is heavy metallic oxide pre-collimator.
In technique scheme of the present utility model, x ray generator comprise put on X-ray tube two ends high pressure generator, contain pre-collimator and radiation proof x-ray source assembly, produce can modulation of X-ray rotating mechanism, for the heat-pipe radiator of cooling X-ray tube anode and support the mechanical device of fixing use; High pressure generator is arranged in the extension chamber of X-ray tube housing, and heat-pipe radiator can independently assemble, and aforementioned all parts can be integrated into compact single entities structure.
Like this, the x ray generator that a kind of collimation that the utility model provides can be modulated, comprises high pressure generator, x-ray source assembly, collimation modulation rotating mechanism, heat-pipe radiator and supporting machinery device, and above-mentioned parts is integrated into single entities.Its technical characterstic is, composite type single entities structure, and the heat pipe type of cooling, by the fan-shaped collimater of front end and tungsten ring rotating mechanism, is modulated to continuous modulated form of a stroke or a combination of strokes X ray by fan-shaped x-ray beam, thereby has realized the dynamic point by point scanning to detected object.
According to above-mentioned technical scheme, described high pressure generator, for providing high direct voltage between the negative electrode of X-ray tube and anode, makes the negative electrode of X-ray tube produce stream of energetic electrons and bombard plate target, launches X-ray beam.Described high pressure generator is arranged in the extension chamber of X-ray tube housing, makes it to form an entirety with x-ray source assembly, fills pure transformer insulation oil in whole tube chamber.
According to above-mentioned technical scheme, filament transformer adopts UY type ferrite magnetic core, avoids the insulation breakdown of former secondary by high voltage bearing transformer framework; High-tension transformer is selected stray flux and leakage inductance is low, magnetic permeability is high R type shape FERRITE CORE; High voltage output adopts multi-stage rectifying multiplication of voltage mode, and the profile of high-tension circuit is preferably designed to circle.Aforementioned 3 parts are all fixed on circular insulating resin plate one side, 3 fixed pivots of the peripheral projection of resin plate, and core suitably empties so that the circulation of built-in electrical insulation oil.Meanwhile, a circle positioning boss is played in the inner side of radiation protection lead layer, by cage shape grid spacer, 3 circular insulating resin plate is limited in to desired location.Back end DC High voltage output is connected with X-ray tube by inserting mode; Be electrically connected by grease proofing aviation connection-peg with control system.
According to above-mentioned technical scheme, described x-ray source assembly, comprises drum-shape X-ray tube shell, mounting boss, X-ray tube and anode heat dissipation base thereof, radiation protection layer, Merlon isolation filter cover, negative electrode end cover, vacuum impregnating oilhole, expansion eardrum etc.The end cover effect of having held concurrently of anode heat dissipation base, and the slightly heat transfer contact face of microprotrusion of one of fine finishining, anode-side sealing ring adopts oxygen-free copper material, prevents high temperature deformation; Merlon spill filtering cover can limit X-ray tube and go out the core intersection in bundle mouthful outside, and itself penetrability is fine, reduces as far as possible thus the decay to x-ray dose rate; X-ray tube housing has the fan-shaped cone-beam mouth of certain angle according to X-ray tube subtended angle characteristic, in the time that X-ray tube two ends apply high direct voltage, produce effective X-ray beam.
According to above-mentioned technical scheme, the preferred oxygen-free copper material of X-ray tube anode base, entirety is larger, and tail end extends outward, can increase thermal capacity and radiating surface, the effect of heat transfer and X-ray tube housing anode seal end cap of simultaneously having held concurrently.
According to above-mentioned technical scheme, negative electrode end cover sticks the expansion eardrum of certain dilatability, forms an air chamber between expansion eardrum and end cap; After x ray generator work, built-in electrical insulation oil meeting expanded by heating, can shrink by volume when temperature reduces to some extent, by atmospheric side or insulating oil side extrusion expansion eardrum, forms release channel by the air vent hole of negative electrode end cap, realizes pressure at both sides balance.Air vent hole is designed to internal thread mode, and band through hole in its protection bolt can screw in protection bolt if there is oil leakage fault, blocks insulating oil, prevents from revealing.Above-mentioned expansion eardrum and end cap are combined, the sealing ring effect of having held concurrently, and than conventional air bag mode, design processing is more convenient effectively with assembling application.
According to above-mentioned technical scheme, described collimation modulating device, comprises rotation tungsten ring, pre-collimator, angular contact bearing, driving pulley, driven pulley, driving belt, locking nut, servomotor.Rotation tungsten ring has the aperture of some suitable dimensions, and is fixed on driven pulley; Pre-collimator was moved anchor ear and was anchored on X-ray tube hull outside; Driven pulley inner side is embedded with angular contact bearing, and bearing is fixed on X-ray tube housing outer surface, fastening by locking nut; Servomotor, by the driving driven pulley of initiatively leading the way, through the running of angular contact bearing, drives tungsten to turn round around pre-collimator, and realization can X ray pointwise continuous sweep.Aforementioned collimation modulating device, has simplified rotating mechanism, and required driving power is little, and energy-conserving and environment-protective reduce noise, and hot spot characteristic are good, weaken penumbral effect, improve image resolution ratio.
According to above-mentioned technical scheme, pre-collimator has certain thickness, be embedded in spill Merlon filtering cover, material is heavy metallic oxide, be easy to machine-shaping, be preferably bismuth oxide, such material has High-Voltage Insulation and radiation proof feature concurrently, there is environment-friendly advantage, other also meet the demands as lead oxides simultaneously.There is rib structure tungsten ring both sides, itself there is good Radioprotective Effect, form effective labyrinth type radiation protection structure simultaneously together with the protection of X-ray tube housing internal layer, embedded pre-collimator, ensure that the X ray leakage dosage of system meets radiation safety requirement.
According to above-mentioned technical scheme, described cooling device, adopts heat pipe heat radiation mode, is made up of heat pipe, strap, heat-conducting substrate, radiating fin and quiet fan.In order to prevent that the anode of described X-ray tube is overheated and cause target spot ablation, conventional air blast cooling device, cooling-down effect is limited; Circulation oil-cooling or water cooling plant are made up of heat exchanger, fan and magnetic drive pump, and parts are many, cost is high and easy seepage.And heat pipe is a kind of heat conductor efficiently, carry out transferring heat by the evaporation and condensation of the liquid in Totally enclosed vacuum pipe, conventional have L-type or a U-shaped structure; Its evaporation ends is fixed by heat-conducting substrate, with the heat transfer contact convex surface close contact of aforementioned X-ray tube anode base; The large-area radiating fin of its condensation end welding multilayer, improves efficiently radiates heat area and heat dispersion; Quiet fan combination protective cover top induced draught fan is upwards extracted hot-air in casing out, cold air is filled into from protective cover surrounding shutter pore, according to thermal convection and pressure differential principle, realize circulation of air air channel smoothly, can more efficiently anode heat be derived fast.Comparatively speaking, heat pipe cooling device is simplified small and exquisite, and fault point is few, can not affect the sealing of system, and working stability is easy to maintenance, and power consumption is few, and noise is little, and cost is low, has good novelty and practical function.
According to above-mentioned technical scheme, heat pipe also can directly be clamped on anode heat dissipation base.
According to above-mentioned technical scheme, described mechanical device, is integrated into single entities structure by above-mentioned functions device, comprises fixed support, outer protective cover, electric machine support, jackscrew, ringfeder.Fixed support is mainly assembling X-ray tube housing and peripheral components, and additional protective cover, realizes modularization.In order to ensure to modulate hot spot characteristic and the assembling effect of rear X ray, mechanical device should require good processing technology and precision.
According to above-mentioned technical scheme, also comprise the Miniature temperature switch and the temperature sensor that are embedded in anode heat dissipation base, inverter circuit and control box, related electric control interface, approach switch etc.
Because the utility model has adopted technique scheme, therefore there is following beneficial effect: one, high pressure generator is blended in X-ray tube enclosure interior, and be combined into single entities structure with x-ray source assembly, X ray collimation modulating device and cooling system, exquisite small and exquisite, contribute to miniaturization, modularization and the high efficiency design of X ray class rays safety detection apparatus, modern design, practicality is good; Its two, X ray may be modulated as pencil beam dynamic scan, hot spot characteristic is good, penumbral effect is little, is conducive to improve image resolution ratio; Its three, heat-pipe radiating apparatus coordinates effective Duct design, entirety is succinct reliable, reduces the fault point, and can independently assemble.
Brief description of the drawings
Fig. 1 is the front view of the x ray generator that can modulate according to the collimation of a preferred embodiment of the utility model;
Fig. 2 is that A along Fig. 1 is to view;
Fig. 3 is the B-B cutaway view along Fig. 1;
Fig. 4 is the high-tension circuit layout outline drawing in the x ray generator shown in Fig. 1;
Fig. 5 is the grid spacer schematic diagram in the x ray generator shown in Fig. 1;
Fig. 6 is the labyrinth type radiation protection schematic diagram in the x ray generator shown in Fig. 1;
Fig. 7 is the heat radiation contact-making surface schematic diagram in the x ray generator shown in Fig. 1; With
Fig. 8 is the high voltage source schematic diagram in the x ray generator shown in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, to the utility model, embodiment is further described.
Referring to Fig. 1, it is the general structure of the utility model embodiment, mainly comprises x-ray source assembly 200, collimation modulating device 300, driving pulley 304, driven pulley 305, driving belt 306, servomotor 308, heat pipe cooling device 400, fixed support 501 and grease proofing airline base 107.
The core components such as x-ray source assembly 200, collimation modulating device 300 and heat pipe cooling device 400 are combined as compact single entities structure, and are integrated in X-ray tube housing 201; Servomotor 308, by driving wheel 304, utilizes feed belt 306 to drive driven pulley 305 to realize rotatablely moving of collimation modulating device 300; Fixed support 501 is used for assembling X-ray tube housing 201, servomotor 308 and miscellaneous part, and has relevant installing hole; Realize the electric and automatic control function of system by anti-oil seal airline base 107.
According to the utility model, as shown in Figures 1 to 3, the x ray generator that collimation can be modulated comprises x-ray source assembly 200, collimation modulating device 300, high pressure generator 100 and cooling device 400, wherein x-ray source assembly 200, high pressure generator 100, collimation modulating device 300 and heat pipe cooling device 400 structure that becomes one.Particularly, x-ray source assembly 200 comprises X-ray tube and the pre-collimator 302 with negative electrode and anode.High pressure generator 100 is used between the negative electrode of X-ray tube and anode provides high direct voltage with X ray excited bundle, and wherein, described high pressure generator 100 is arranged in the extension chamber of X-ray tube housing 201.Collimation modulating device 300 can be rotatably set in the outside of pre-collimator 302, for fan-shaped x-ray beam being modulated into continuous form of a stroke or a combination of strokes X-ray beam.And cooling device can be assembled to X-ray tube independently, for the anode of cooling X-ray tube.
Referring to Fig. 1 and Fig. 2, pre-collimator 302 preferential oxidation bismuth materials, have High-Voltage Insulation and radiation proof effect concurrently, and cost is low, lightweight, meet environmental protection and are convenient to processing.Described pre-collimator 302 is fixed in X-ray tube housing 201 outsides by arc anchor ear ring.
Referring to Fig. 3, x-ray source assembly also comprises the distolateral anode heat dissipation base 204 of anode that is arranged in X-ray tube; End cap 207 and the expansion eardrum 208 distolateral with the negative electrode that is arranged in X-ray tube, wherein end cap 207 and expansion eardrum 208 coordinate to play the effect of leakproof and sealing.In the time that X-ray tube 203 goes out to restraint continuously, insulating oil temperature raises, and volume has a certain amount of expansion, from inside to outside extrusion expansion eardrum 208; When otherwise temperature reduces, extrusion expansion eardrum 208 from outside to inside under atmospheric pressure effect.Expansion eardrum 208 is attached at the inner side of negative electrode end cap 207, the sealing ring effect of having held concurrently.
Preferably, anode heat dissipation base is embedded with temperature sensor 601 and temperature switch 602.Referring to Fig. 7, the embedded micro temperature sensor 601 of X-ray tube anode heat dissipation base 204 and temperature switch 602; The working temperature of temperature sensor 601 Real-Time Monitoring X-ray tubes 203, temperature switch 602 can provide in time fault-signal, protection device security in the time that temperature exceedes permission threshold value.
Referring to Fig. 1 to 3, x ray generator can also comprise cooling device 400, and cooling device 400 can be assembled to X-ray tube independently, for the anode of cooling X-ray tube.Particularly, the anode heat dissipation base 204 in x-ray source assembly has heat transfer contact face 211, for contacting to realize cooling with cooling device 400.Cooling device can comprise heat pipe 401 and heat-radiating substrate 405; Wherein, heat pipe 401 is arranged on heat-radiating substrate 405, and heat-radiating substrate 405 fully contacts with the heat transfer contact face 211 of anode heat dissipation base 204 by heat-conducting silicone grease.Alternatively, cooling device 400 can only include heat pipe 401; Wherein, the direct clamping heat transfer contact face 211 to anode heat dissipation base 204 of heat pipe 401.Further, cooling device 400 can also comprise the radiating fin 402 being arranged on heat pipe 401 and the quiet fan 403 that is arranged on radiating fin 402 tops.Preferably, heat pipe 401 can have U-shaped or L-type shape.
As shown in figures 1 and 3, cooling device 400, for taking away the plate target heat of X-ray tube 203, comprises anode heat dissipation base 204, heat pipe 401, radiating fin 402, quiet fan 403 and heat-radiating substrate 405.Heat pipe 401 every independences, itself have certain intensity, and preferably bending is U-shaped pattern, and several U-shaped heat pipes are fixing by heat-radiating substrate 405.Heat pipe 401 surroundings are welded with radiating fin 402, increase efficiently radiates heat area; Quiet fan 403 is fixed by buckle mode.Aforementioned structure entirety is passed through strap spiral-lock on X-ray tube anode radiator 204.
As shown in Figure 3 and Figure 7, radiator contact-making surface 211 of anode radiator base 204 outside fine finishining, it is clean harmless that all want on the surface of it and heat-radiating substrate 405, and evenly smear thin layer high-quality heat-conducting silicone grease, to ensure the abundant combination of heat conduction contact-making surface, being conducive to derives heat fast.Heat-radiating substrate 405 fully contacts by heat-conducting silicone grease with heat radiation contact-making surface 211.
As shown in figures 1 and 3, quiet fan 403 is placed in the top of radiating fin 402, vertically upward air draught.The thermal convection principle declining according to hot air rising cold air, forms the smooth and easy air channel shown in the direction of arrow in Fig. 1; This heat abstractor independently assembles, and reduces system failure point, and exquisite environmental protection, stablizes convenient and cost is low.
As shown in Figure 3, X-ray tube anode heat dissipation base 204, preferably oxygen-free copper material, can derive heat rapidly, plays a part again X-ray tube housing 201 anode seal end caps; Its sealing ring 209 is preferentially selected oxygen-free copper material, can prevent that General Purpose Rubber bar sealing ring is easily because excess Temperature damages; On it, also have vacuum impregnating oilhole 210, to ensure the performance of built-in electrical insulation oil.
As shown in Figure 3, anode heat dissipation base 204 entirety are larger, and its tail end extends outward, can increase thermal capacity and radiating surface, and heat pipe also can select to be directly clamped on the mode of anode heat dissipation base.
According to the utility model, referring to Fig. 1 and Fig. 3, x ray generator also comprises high pressure generator 100, is used between the negative electrode of X-ray tube and anode and provides high direct voltage with X ray excited bundle, wherein, high pressure generator 100 is arranged in the extension chamber of X-ray tube housing 201.As shown in Figure 3, high pressure generator 100 is distributed in the extension chamber of X-ray tube housing 201; X-ray tube housing 201 is fixed on support 501 by mounting boss 202.High direct voltage output is docked to X-ray tube 201 cathode filament two ends by high pressure connection-peg 106.
Particularly, X-ray tube 201 and the connection of extension chamber and inside are filled with insulating oil.As shown in Figure 3, in the cavity of X-ray tube housing 201, fill high voltage insulating oil.Pore 212 is designed to internal thread mode, and the interior band L-type of its protection bolt 213 through hole, realizes the inner and extraneous pressure balance of X-ray tube housing 201 by this through hole.If there is oil leakage fault, protection bolt 213 can be screwed in, block pore 212, prevent insulating oil leakage.
As shown in Figure 3, spill filtering cover 206 optimization polycarbonate materials, restriction X-ray tube 203 goes out the core intersection of bundle mouth, and itself is good to the penetrability of X ray, improves the effective dose of X ray output.
As shown in Figure 3 and Figure 4, high pressure generator 100 comprises the circumferential high-tension circuit 101, high-tension transformer 102 and the filament transformer 103 that are arranged in extension chamber; Wherein, circumferential high-tension circuit 101, high-tension transformer 102 and filament transformer 103 lay respectively in corresponding insulating resin plate 104, and are all arranged to be positioned at the side away from X-ray tube of corresponding insulating resin plate 104.Preferably, insulating resin plate 104 is hollow and the peripheral annular insulating resin plate with the fixed pivot of multiple projections, and wherein the hollow space of annular insulating resin plate 104 is suitable for the circulation of insulating oil.
As shown in Figure 3 and Figure 4, high-tension circuit 101 layouts are circumferential, high-tension transformer 102 adopts R type magnetic core, filament transformer 103 adopts UY type magnetic core, aforementioned 3 parts are all fixed on circular insulating resin plate 104 1 sides, 3 fixed pivots of the peripheral projection of resin plate, core suitably empties so that the circulation of built-in electrical insulation oil.
Further, high pressure generator 100 also comprises the cage shape grid spacer 105 of fixed and arranged in extension chamber, and insulating resin plate 104 is positioned in extension chamber regularly by cage shape grid spacer 105.As shown in Figure 3 and Figure 5, by cage shape grid spacer 105,3 circular insulating resin plate 104 are limited in to desired location.
At length, collimation modulating device 300 comprises modulation rotation tungsten ring 301, and for driving modulation rotation tungsten to turn round to realize the rotary drive mechanism of X ray pointwise continuous sweep around pre-collimator. rotary drive mechanism comprises the motor 308 being fixed on fixed support 501; Be connected to the driving pulley 304 of motor 308; Be connected to the driven pulley 305 of modulation rotation tungsten ring 301; And be connected to the driving belt 306 between driving pulley 304 and driven pulley 305.
Referring to Fig. 3, x-ray source assembly 200 and collimation modulating device 300, comprise X-ray tube housing 201, mounting boss 202, liner radiation protection layer 205, X-ray tube 203 and anode heat dissipation base 204 thereof, oxygen-free copper sealing ring 209, spill filtering cover 206, negative electrode end cover 207, expansion eardrum 208, rotation tungsten ring 301, driven pulley 305, locking nut 307, pre-collimator 302, angular contact bearing 303 and grease proofing aviation socket 107.
As shown in Figures 1 to 3, it is the servomotor 308 being fixed on electric machine support 503 that tungsten ring 301 rotates required drive source, and driving pulley 304 on the power transmission shaft of servomotor 308, by feed belt 306, drives driven pulley 305 to rotate by ringfeder lock ring; Driving pulley 304 and driven pulley 305 meet certain gearratio relation.
As shown in Figures 2 and 3, rotation tungsten ring 301 has several small through hole, is set in pre-collimator 302 outsides, and is fixed on driven pulley 305 by screw; Angular contact bearing 303 is set in the outer surface of X-ray tube housing 201, is close to positive stop lug boss, locks by locking nut 307; Driven pulley 305 is installed on angular contact bearing 303 outsides; Driving rotation tungsten by servomotor 308 turns round around pre-collimator 302, realizes X ray with pencil beam dynamic scan.Rotation is small and exquisite with radioprotector structure, has the low in energy consumption and little advantage of noise.
As shown in Figure 3, by the X ray pencil beam after 301 modulation of rotation tungsten ring, hot spot characteristic is good, and penumbral effect is little, is conducive to improve image resolution ratio.
Further, rotary drive mechanism can also comprise the stretching unit of the elasticity for regulating driving belt 306.As depicted in figs. 1 and 2, servomotor 308 can be by the elasticity of the institutional adjustment feed belts 306 such as jackscrew 504 and regulating wheel 505.
According to the utility model, x ray generator can also comprise mechanical fastening system 500, and wherein, x-ray source assembly 200, high pressure generator 100, collimation modulating device 300 and cooling device 400 are supported by the fixed support 501 of mechanical fastening system 501.
According to the utility model, x ray generator can also comprise radiation protection structure, is jointly formed by the radiation protection layer 205, pre-collimator 302 and the rotation tungsten ring 301 that are arranged in X-ray tube and extension chamber.
As shown in Figure 3 and Figure 5, a circle positioning boss 108 is played in the inner side of radiation protection lead layer 205, by cage shape grid spacer 105,3 circular insulating resin plate 104 is limited in to desired location.
As shown in Figure 3 and Figure 6, pre-collimator 302 is preferably heavy metallic oxide pre-collimator, needs certain thickness and subtended angle characteristic, and X-ray beam is constrained in taper fan-shaped mouth; There is rib structure the both sides of rotation tungsten ring 301, and are located on pre-collimator 302, spacing 1mm left and right in outside in the two; Except tungsten ring is opened aperture, X ray only has the release route shown in Fig. 2; The interior overcoat of X-ray tube housing 201, pre-collimator 302 have formed effective labyrinth type radiation protection structure together with rotation tungsten ring 301, stop X ray to leak outside.
Referring to Fig. 8, civil power is through rectifying and pressure-regulating module 1, then outputs to high pressure transformation 102 by full bridge inverter and carry out elementary boosting, and then is input to voltage doubling rectifier module 101 and obtains negative high voltage, finally puts on the negative electrode of X-ray tube 203; Civil power is connected to the former limit of filament transformer 103 through rectifying and pressure-regulating module 2 and half-bridge inversion circuit, secondary is connected to the two ends of X-ray tube 203 cathode filaments; Inversion is connected by airline base 107 with control module 603, produces and accelerate hot electron in the time that high pressure puts on the two ends of X-ray tube 203, and impinge anode target produces X-ray beam.
Although by reference to the accompanying drawings the utility model is illustrated, in accompanying drawing, disclosed embodiment is intended to the utility model preferred implementation to carry out exemplary illustration, and can not be interpreted as a kind of restriction of the present utility model.
Although some embodiment of this overall utility model design are shown and explanation, those skilled in the art will appreciate that, in the case of not deviating from the principle and spirit of this overall utility model design, can make a change these embodiment, scope of the present utility model limits with claim and their equivalent.
Claims (17)
1. the x ray generator that collimation can be modulated, comprising:
X-ray source assembly, comprises X-ray tube and the pre-collimator with negative electrode and anode;
High pressure generator, is used between the negative electrode of X-ray tube and anode and provides high direct voltage with X ray excited bundle, and wherein, described high pressure generator is arranged in the extension chamber of X-ray tube housing;
Collimate modulating device, can be rotatably set in the outside of pre-collimator, for fan-shaped x-ray beam being modulated into continuous form of a stroke or a combination of strokes X-ray beam; With
Cooling device, can be assembled to X-ray tube, independently for the anode of cooling X-ray tube;
Wherein, described x-ray source assembly, described high pressure generator, described collimation modulating device and the described cooling device structure that becomes one.
2. x ray generator as claimed in claim 1, wherein said x-ray source assembly also comprises:
Be arranged in the distolateral anode heat dissipation base of anode of X-ray tube; With
Be arranged in distolateral end cap and the expansion eardrum of negative electrode of X-ray tube, wherein said end cap and described expansion eardrum coordinate to play the effect of leakproof and sealing.
3. x ray generator as claimed in claim 2, wherein, described anode heat dissipation base has heat transfer contact face, for contacting to realize cooling with described cooling device.
4. x ray generator as claimed in claim 3, wherein, described cooling device comprises heat pipe and heat-radiating substrate;
Wherein, described heat pipe is arranged on heat-radiating substrate, and described heat-radiating substrate fully contacts with the heat transfer contact face of anode heat dissipation base by heat-conducting silicone grease.
5. x ray generator as claimed in claim 3, wherein, described cooling device comprises heat pipe; Wherein, the directly clamping heat transfer contact face to anode heat dissipation base of described heat pipe.
6. the x ray generator as described in claim 4 or 5, wherein, described cooling device also comprises:
Be arranged in the radiating fin on heat pipe; With
Be arranged on the quiet fan of radiating fin top.
7. the x ray generator as described in claim 4 or 5, wherein, described heat pipe preferably has U-shaped shape.
8. x ray generator as claimed in claim 2, wherein,
Described anode heat dissipation base is embedded with temperature sensor and temperature switch.
9. x ray generator as claimed in claim 1, wherein,
Described X-ray tube and extension chamber are communicated with and inside is filled with insulating oil.
10. x ray generator as claimed in claim 1, wherein, described high pressure generator comprises the circumferential high-tension circuit, high-tension transformer and the filament transformer that are arranged in extension chamber; Wherein, described circumferential high-tension circuit, high-tension transformer and filament transformer lay respectively in corresponding insulating resin plate, and are all arranged to be positioned at the side away from X-ray tube of corresponding insulating resin plate.
11. x ray generators as claimed in claim 10, wherein,
Described insulating resin plate is hollow and the peripheral annular insulating resin plate with the fixed pivot of multiple projections, and the hollow space of wherein said annular insulating resin plate is suitable for the circulation of insulating oil.
12. x ray generators as claimed in claim 10, wherein,
Described high pressure generator also comprises the cage shape grid spacer of fixed and arranged in extension chamber, and described insulating resin plate is positioned in described extension chamber regularly by described cage shape grid spacer.
13. x ray generators as claimed in claim 1, wherein said collimation modulating device comprises:
Rotation tungsten ring for modulation; With,
For driving described modulation rotation tungsten to turn round to realize the rotary drive mechanism of X ray pointwise continuous sweep around front end collimater, described rotary drive mechanism comprises:
Be fixed on the motor on mechanical fastening system;
Be connected to the driving pulley of motor;
Be connected to the driven pulley of modulation rotation tungsten ring; With
Be connected to the driving belt between driving pulley and driven pulley.
14. x ray generators as claimed in claim 13, wherein, described rotary drive mechanism also comprises the stretching unit of the elasticity for regulating driving belt.
15. x ray generators as claimed in claim 1, also comprise radiation protection structure, are jointly formed by the radiation protection layer, front end collimater and the rotation tungsten ring that are arranged in X-ray tube and extension chamber.
16. x ray generators as claimed in claim 1, wherein, described pre-collimator is heavy metallic oxide pre-collimator.
17. x ray generators as claimed in claim 1, also comprise mechanical fastening system, and wherein, described x-ray source assembly, described high pressure generator, described collimation modulating device and described cooling device are supported by described mechanical fastening system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301695.2U CN203934087U (en) | 2014-06-06 | 2014-06-06 | The x ray generator that a kind of collimation can be modulated |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301695.2U CN203934087U (en) | 2014-06-06 | 2014-06-06 | The x ray generator that a kind of collimation can be modulated |
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| Publication Number | Publication Date |
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| CN203934087U true CN203934087U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420301695.2U Withdrawn - After Issue CN203934087U (en) | 2014-06-06 | 2014-06-06 | The x ray generator that a kind of collimation can be modulated |
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| CN (1) | CN203934087U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997839A (en) * | 2014-06-06 | 2014-08-20 | 同方威视技术股份有限公司 | Collimation modulating X-ray generator |
| CN108461369A (en) * | 2018-05-10 | 2018-08-28 | 同方威视技术股份有限公司 | Two point beam scanning X-ray emitter |
-
2014
- 2014-06-06 CN CN201420301695.2U patent/CN203934087U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997839A (en) * | 2014-06-06 | 2014-08-20 | 同方威视技术股份有限公司 | Collimation modulating X-ray generator |
| WO2015185003A1 (en) * | 2014-06-06 | 2015-12-10 | 同方威视技术股份有限公司 | Collimation modulatable x-ray generator |
| US9779908B2 (en) | 2014-06-06 | 2017-10-03 | Nuctech Company Limited | X-ray generator with adjustable collimation |
| CN108461369A (en) * | 2018-05-10 | 2018-08-28 | 同方威视技术股份有限公司 | Two point beam scanning X-ray emitter |
| CN108461369B (en) * | 2018-05-10 | 2024-03-12 | 同方威视技术股份有限公司 | Dual spot beam scanning X-ray generator |
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| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ding Fuhua Inventor after: Chen Zhiqiang Inventor after: Zhao Ziran Inventor after: Wu Wanlong Inventor after: Tang Le Inventor after: Jin Yingkang Inventor after: Wen Yanjie Inventor before: Ding Fuhua Inventor before: Chen Zhiqiang Inventor before: Zhao Ziran Inventor before: Wu Wanlong Inventor before: Tang Le Inventor before: Jin Yingkang Inventor before: Wen Yanjie |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20180330 |