WO2023050976A1 - Dispositif cible de conversion de rayons x de puissance élevée de type oscillant - Google Patents

Dispositif cible de conversion de rayons x de puissance élevée de type oscillant Download PDF

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Publication number
WO2023050976A1
WO2023050976A1 PCT/CN2022/105728 CN2022105728W WO2023050976A1 WO 2023050976 A1 WO2023050976 A1 WO 2023050976A1 CN 2022105728 W CN2022105728 W CN 2022105728W WO 2023050976 A1 WO2023050976 A1 WO 2023050976A1
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WO
WIPO (PCT)
Prior art keywords
conversion target
plate
cooling liquid
pipe
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/105728
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English (en)
Chinese (zh)
Inventor
陆洁平
倪晓敏
査军
肖珺
陈海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CGN Dasheng Electron Accelerator Technology Co Ltd
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CGN Dasheng Electron Accelerator Technology Co Ltd
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Publication date
Application filed by CGN Dasheng Electron Accelerator Technology Co Ltd filed Critical CGN Dasheng Electron Accelerator Technology Co Ltd
Publication of WO2023050976A1 publication Critical patent/WO2023050976A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/101—Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/105—Cooling of rotating anodes, e.g. heat emitting layers or structures
    • H01J35/106—Active cooling, e.g. fluid flow, heat pipes

Definitions

  • the invention belongs to the technical field of radiation processing, and in particular relates to a swinging high-power X-ray conversion target device.
  • the X-ray power converted by electron beams needs to reach a certain level.
  • Existing X-ray conversion target products are restricted by the X-ray conversion rate of electron beam conversion.
  • the ideal X-ray conversion target is obtained by selecting a heavy metal plate with an optimal thickness and high atomic number as the conversion target, and increasing the energy and beam current of the electron beam. Ray power output.
  • the high power of the electron beam generated by the high energy and large beam current will directly act on the heavy metal plate layer on the surface of the X-ray conversion target to achieve the output of X-rays less than 10% of the total power, and the rest of the energy will be released through heat energy. Therefore, the conversion target needs to have good overall heat dissipation performance and needs to have external cooling.
  • the conversion target needs cooling liquid to cool the target material layer of the conversion target.
  • X-ray conversion target structures for high-power electrons.
  • One is to design a cooling liquid layer between the heavy metal plate material layer and the light metal material layer, and then fasten the sealing ring with bolts to realize the sealing of the cooling liquid layer and the cooling effect of the target.
  • the liquid flow in the cooling liquid layer is very wide and long, which easily leads to uneven liquid flow velocity, and easily produces air bubbles that affect the cooling effect of the cooling liquid on the conversion target.
  • the direct contact between the cooling liquid and the target will also affect the target. There is a certain corrosion effect, and the long-term electron beam acts on the same area of the target, etc., which greatly affect the service life of the target.
  • the other is to directly weld the heavy metal material layer and the light metal material layer together, and then weld the heat conduction coolant pipe under the light metal material layer.
  • the disadvantage of this method is that the heat-conducting coolant pipeline has a certain absorption effect on X-rays, thereby affecting the uniformity of X-ray output.
  • the present invention provides a swinging high-power X-ray conversion target device.
  • the support assembly of the conversion target can drive the conversion target to reciprocate linear motion and reciprocating swinging motion, so that the electron beam will not fall on the target.
  • the conversion target is realized by combining heavy and light metal composite plates and coolant pipes
  • the generation of X-rays and the filtration of low-energy rays after bombardment by high-energy electron beams not only have high conversion efficiency, but also can avoid direct contact between the coolant and the heavy metal plate while ensuring a good cooling effect, without target corrosion hidden dangers and sealing
  • the problem of ring replacement is simple, the reliability is high, and the service life is long.
  • a swinging high-power X-ray conversion target device including a conversion target and a support assembly for supporting the conversion target, and the conversion target and support assembly are arranged under the scanning window
  • the support assembly includes a support frame and a motor drive mechanism
  • the support frame includes a frame body and guide rails arranged on both sides of the frame body, the guide rails on both sides are provided with a motor drive mechanism
  • the motor drives includes a drive motor, a pulley and a connecting plate, the pulley is arranged on the guide rail, the driving motor drives the pulley to move, and drives the connecting plate to move with the pulley, and the connecting plate is hinged to the conversion target .
  • a limit travel switch is provided at the end of the guide rail.
  • the guide rails include a first guide rail and a second guide rail arranged in parallel, and the pulley is clamped between the first guide rail and the second guide rail.
  • the conversion target includes a metal composite plate, a number of cooling liquid pipes arranged under the metal composite plate, side fixing frames arranged on both sides of the short side of the metal composite
  • the cooling liquid pipes communicate with each other
  • the metal composite plate includes a heavy metal plate and a light metal plate arranged under the heavy metal plate, a number of arc-shaped grooves are arranged at the bottom of the light metal plate, and the cooling liquid pipe is arranged in the arc-shaped groove superior.
  • cooling liquid pipe is arranged along a direction parallel to the short side of the conversion target.
  • the hinge structure between the connecting plate and the conversion target is that a connection hole is opened on the side fixing frame of the conversion target, and the connection plate is connected with the connection hole through a bolt, and the connection hole is Waist-shaped hole, the longer axis of the connection hole is perpendicular to the short side direction of the conversion target.
  • the depth of the arc-shaped groove of the light metal plate is 50-65% of the thickness of the metal composite plate.
  • the material of the heavy metal plate in the metal composite plate is one of tantalum, tungsten, and gold.
  • the material of the light metal plate in the metal composite plate is one of copper and aluminum.
  • the cooling liquid pipe is a copper pipe
  • the cooling liquid pipe is an aluminum pipe
  • the motor drive mechanism is set on the support assembly of the conversion target, which can drive the conversion target to reciprocate linear motion and swing motion, so that the electron beam will not bombard the same position of the target for a long time, and avoid the target deformation or advance due to local overheating of the conversion target Damage, prolong the service life of the target, and effectively improve the uniformity of X-ray output;
  • the lower end of the metal composite plate of the conversion target is provided with a number of coolant pipes, so that the coolant will not directly contact the metal composite plate, avoiding the risk of the metal composite plate being corroded by the coolant, and improving the overall service life of the target.
  • the drawbacks in the prior art that the coolant needs to be isolated and sealed by sealing materials such as sealing rings, and the sealing rings need to be replaced regularly are eliminated;
  • the cooling liquid pipe is arranged parallel to the short side of the conversion target, which shortens the distance of the cooling liquid flowing from the cooling liquid input pipe to the cooling liquid output pipe, improves the heat exchange rate, and makes the flow rate of the cooling liquid more uniform, thereby Better cool down the metal composite board and improve the overall heat dissipation performance of the conversion target;
  • Figure 1 is a schematic diagram of the structure of the swing type high-power X-ray conversion target device of the present invention
  • Fig. 2 is the structural schematic diagram II of the oscillating high-power X-ray conversion target device of the present invention
  • Fig. 3 is the front view of the X-ray conversion target of the present invention.
  • Fig. 4 is a sectional view of the X-ray conversion target of the present invention.
  • Fig. 5 is a partially enlarged view of the X-ray conversion target of the present invention.
  • Fig. 6 is a schematic diagram of the reciprocating linear motion of the conversion target on the support assembly of the present invention.
  • Fig. 7 is a schematic diagram of the reciprocating swinging movement of the conversion target on the support assembly according to the present invention.
  • conversion target 110, metal composite plate; 111, heavy metal plate; 112, light metal plate; 1121, arc-shaped groove; 120, cooling liquid pipe; 130, side fixing frame; Coolant input pipe; 150, coolant output pipe; 20, support assembly; 210, support frame; 211, frame body; 212, guide rail; 2121, first guide rail; 2122, second guide rail; 220, motor drive mechanism; , drive motor; 222, pulley; 223, connecting plate; 2231, bolt; 230, limit travel switch.
  • a swinging high-power X-ray conversion target device includes a conversion target 10 and a support assembly 20 for supporting the conversion target 10 , and the conversion target 10 and support assembly 20 are arranged below the scanning window.
  • the conversion target 10 includes a metal composite plate 110, a plurality of cooling liquid pipes 120 arranged under the metal composite plate 110, and side fixing frames 130 arranged on both short sides of the metal composite plate 110. And the cooling liquid input pipe 140 and the cooling liquid output pipe 150 respectively disposed on both sides of the long side of the metal composite plate 110 , the cooling liquid pipe 120 is disposed between the cooling liquid input pipe 140 and the cooling liquid output pipe 150 .
  • the coolant inlet pipe 140 and the coolant outlet pipe 150 are oppositely provided with several holes, the inner diameter of the holes is consistent with the inner diameter of the coolant pipe 120, and the coolant pipe 120 is welded at the corresponding holes so that it is connected with the coolant input.
  • the pipe 140 communicates with the coolant output pipe 150 .
  • the cooling liquid enters from the cooling liquid input pipe 140 , flows through all the cooling liquid pipes 120 and finally flows out from the cooling liquid output pipe 150 to cool down the metal composite plate 110 .
  • the cooling liquid will not directly contact the metal composite plate 110, avoiding the risk of the metal composite plate 110 being corroded by the cooling liquid, improving the service life of the target as a whole, and abandoning the prior art that needs sealing materials such as sealing rings to isolate, The downside of sealing the coolant and requiring periodic replacement of the seals.
  • the metal clad plate 110 includes a heavy metal plate 111 and a light metal plate 112 disposed below the heavy metal plate 111 , and the heavy metal plate 111 and the light metal plate 112 are combined through an explosive composite process.
  • the heavy metal plate 111 is used to receive high-energy and high-power electron beam bombardment. When the high-energy electron beam bombards the heavy metal plate 111, bremsstrahlung occurs in the heavy metal plate 111 to generate X-rays. Since the conversion efficiency of X-rays is related to the atomic number, the higher the atomic number is, the higher the corresponding conversion efficiency is.
  • the material of the heavy metal plate 111 is a metal material with a high atomic number, such as tantalum, tungsten, and gold in this embodiment. one of them.
  • the light metal plate 112 is made of copper or aluminum with high thermal conductivity and low atomic number.
  • the light metal plate 112 under the heavy metal plate 111 is used to block the electron beam passing through the heavy metal plate 111, so as to ensure that the irradiated product can only receive X-ray irradiation but not electron beam irradiation, and at the same time obtain a suitable electron conversion X
  • the energy of the ray can effectively filter the remaining electrons of the ray and the low-energy part of the X-ray to realize the hardening of the X-ray.
  • the light metal plate 112 is in direct contact with the heavy metal plate 111, which can better dissipate heat for the heavy metal plate 111.
  • a plurality of arc-shaped grooves 1121 are provided at the bottom of the light metal plate 112 , and the cooling liquid pipe 120 is attached to the arc-shaped grooves 1121 and fixed on the arc-shaped grooves 1121 by welding.
  • the cooling liquid pipe 120 is a copper or aluminum pipe with high thermal conductivity and low atomic number, and in order to facilitate welding, when the light metal plate 112 is a copper plate, the cooling liquid pipe 120 is a copper pipe; when the light metal plate 112 is an aluminum plate ,
  • the coolant pipe 120 is an aluminum pipe.
  • the depth of the arc-shaped groove 1121 is 50-65% of the thickness of the metal composite plate 110, to ensure that the light metal coolant pipe 120 is not in direct contact with the heavy metal plate 111, and the coolant pipe 120 and the metal composite plate 110 should be as large as possible. contact area, so that the metal composite plate 110 can be cooled better.
  • cooling liquid pipes 120 are evenly arranged along the short side direction parallel to the conversion target 10, which effectively shortens the flow of the cooling liquid from the cooling liquid input pipe compared to the arrangement along the long side direction parallel to the conversion target 10.
  • the distance from 140 to the cooling liquid output pipe 150 increases the heat exchange rate and makes the cooling liquid flow rate more uniform, thereby better cooling the metal composite plate 110 and improving the overall heat dissipation performance of the conversion target 10 .
  • the support assembly 20 includes a support frame 210 and a motor drive mechanism 220, the support frame 210 includes a frame body 211 and guide rails 212 arranged on both sides of the frame body 211, and the guide rails 212 on both sides are provided with a motor drive mechanism 220, the motor driving mechanism 220 includes a driving motor 221, a pulley 222 and a connecting plate 223, the pulley 222 is arranged on the guide rail 212, the driving motor 221 drives the moving of the pulley 222, and drives the connecting plate 223 moves with the pulley 222, and the connecting plate 223 is hinged to the conversion target 10.
  • the support assembly 20 has a simple structure, avoids the electron beam bombarding the same position of the target for a long time, and improves the service life and reliability of the conversion target 10 .
  • the guide rail 212 includes a first guide rail 2121 and a second guide rail 2122 arranged in parallel, and the pulley 222 is clamped between the first guide rail 2121 and the second guide rail 2122 .
  • One end of the pulley 222 is connected to the driving motor 221 , and the other end is connected to the connecting plate 223 , so that the driving motor 221 can drive the connecting plate 223 to move through the pulley 222 .
  • the support assembly 20 also includes a travel limit switch 230 for controlling the motion state of the drive motor 221 , the travel limit switch 230 is disposed on the frame body 211 and located at the end of the guide rail 212 .
  • connection hole 131 is provided on the side fixing frame 130 of the conversion target 10.
  • the edge direction is vertical, and the connecting plate 223 is hinged with the conversion target 10 through the cooperation of the bolt 2231 and the connecting hole 131 .
  • the connection hole 131 is a waist-shaped hole, the conversion target 10 disposed on the support assembly 20 can move left and right for a certain distance in the horizontal direction, so that the conversion target 10 can swing on the support assembly 20 .
  • the linear movement of the conversion target 10 can be realized.
  • the specific movement process is: the drive motors 221 on both sides of the guide rail 212 drive the pulleys 222 on the guide rails 212 on both sides to slide in the same direction, and drive the connecting plate 223 to move with the pulley 222, and the conversion target 10 moves in parallel with the connecting plates 223 on both sides.
  • the driving motor 221 is triggered to reverse, and the connecting plate 223 is driven to switch from the original running direction to the opposite direction with the pulley 222, and the conversion target 10 also follows the pulley 222.
  • the connecting plates 223 on both sides move in parallel in opposite directions to realize the reciprocating linear motion of the conversion target 10 within a certain distance.
  • the swing motion of the conversion target 10 can be realized.
  • the specific movement process is: the driving motors 221 on both sides of the guide rail 212 drive the pulleys 222 on the guide rails 212 on both sides to slide towards the opposite direction, and drive the connecting plates 223 on both sides to move towards each other, and the short sides of the conversion target 10 are hinged to the connecting plates 223 , so that both sides of the short side of the conversion target 10 move toward each other with the connecting plates 223 on both sides.
  • the driving motor 221 is triggered to reverse and drive the connecting plate 223 moves in the opposite direction as the pulley 222 switches from the original running direction, and the short sides of the corresponding conversion target 10 move in opposite directions, thereby realizing the reciprocating swing motion of the conversion target 10 on the support assembly 20 .
  • the reciprocating swinging motion of the conversion target 10 on the support assembly 20 makes the area irradiated by the electron beam on the conversion target 10 change continuously at a certain angle, thereby improving the absorption of X-rays by the cooling liquid pipe 120 under the metal composite plate 110, Effectively improve the overall output uniformity of X-rays.
  • the present invention provides a swing-type high-power X-ray conversion target device.
  • the support assembly 20 of the conversion target 10 can drive the conversion target 10 to reciprocate linear motion and reciprocating swing motion, so that the electron beam will not stay at the same position of the target for a long time.
  • Time bombardment avoids target deformation or premature damage caused by local overheating of the conversion target 10, and has a simple structure, high reliability, and effectively improves the uniformity of X-ray output; moreover, the conversion target 10 adopts a metal composite plate 110 and a cooling liquid tube 120 to achieve the generation of X-rays after bombardment by high-energy electron beams and the filtration of low-energy rays, which not only has a high conversion efficiency, but also can avoid direct contact between the cooling liquid and the heavy metal target while ensuring a good cooling effect.
  • the cooling liquid pipe 120 is arranged along the short side direction parallel to the conversion target 10, shortening the distance for the cooling liquid to flow from the cooling liquid input pipe 140 to the cooling liquid output pipe 150, The heat exchange rate is improved, and the flow rate of the coolant is more uniform, so as to better cool down the metal composite plate 110 and improve the overall heat dissipation performance of the conversion target 10; in addition, the bottom of the metal composite plate 110 has several arc-shaped grooves 1121, the cooling liquid pipe 120 is arranged on the arc-shaped groove 1121, which effectively increases the contact area between the cooling liquid pipe 120 and the metal composite plate 110, enhances the heat exchange capacity of the cooling liquid pipe 120, and further improves the heat exchange rate of the conversion target 10. cooling effect.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • X-Ray Techniques (AREA)

Abstract

La présente invention concerne un dispositif cible de conversion de rayons X de puissance élevée de type oscillant, comprenant une cible de conversion et un ensemble de support configuré pour supporter la cible de conversion, la cible de conversion et l'ensemble de support étant agencés au-dessous d'une fenêtre de balayage ; l'ensemble de support comprend un cadre de support et un mécanisme d'entraînement de moteur électrique ; le cadre de support comprend un corps de cadre et des rails de guidage disposés sur deux côtés du corps de cadre ; les rails de guidage sur les deux côtés sont chacun pourvus du mécanisme d'entraînement de moteur électrique ; le mécanisme d'entraînement de moteur électrique comprend un moteur électrique d'entraînement, une poulie et une plaque de liaison ; la poulie est disposée sur le rail de guidage ; le moteur électrique d'entraînement amène la poulie à se déplacer et amène la plaque de liaison à se déplacer le long de la poulie ; et la plaque de liaison est articulée sur la cible de conversion. L'ensemble de support amène la cible de conversion à effectuer un mouvement linéaire alternatif et un mouvement oscillant de va-et-vient, de telle sorte qu'un bombardement à long terme par un faisceau d'électrons sur la même position d'une cible est évité, la durée de vie de la cible est prolongée, et l'uniformité de la sortie des rayons X est améliorée ; et un tuyau de liquide de refroidissement est disposé au niveau de l'extrémité inférieure d'une plaque composite métallique de la cible de conversion, de sorte qu'un bon effet de refroidissement soit garanti, et les problèmes de contact direct entre un liquide de refroidissement et une plaque de métal lourd, des risques de corrosion cachés ne sont pas cibles, et le remplacement d'un anneau d'étanchéité sont également résolus.
PCT/CN2022/105728 2021-09-30 2022-07-14 Dispositif cible de conversion de rayons x de puissance élevée de type oscillant Ceased WO2023050976A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111164529.3A CN113782406A (zh) 2021-09-30 2021-09-30 一种摆动式大功率x射线转换靶装置
CN202111164529.3 2021-09-30

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CN109362169A (zh) * 2018-12-24 2019-02-19 中广核达胜加速器技术有限公司 一种电子加速器x射线转换靶的支承转换装置

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CN113782406A (zh) * 2021-09-30 2021-12-10 中广核达胜加速器技术有限公司 一种摆动式大功率x射线转换靶装置
CN115359945B (zh) * 2022-08-01 2024-12-13 中国原子能科学研究院 一种x射线转换靶移动装置

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CN109362169B (zh) * 2018-12-24 2024-08-09 中广核达胜加速器技术有限公司 一种电子加速器x射线转换靶的支承转换装置

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US20100284518A1 (en) * 2007-12-31 2010-11-11 Anupam Singh Ahlawat Pivoting high flux x-ray target and assembly
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109362169A (zh) * 2018-12-24 2019-02-19 中广核达胜加速器技术有限公司 一种电子加速器x射线转换靶的支承转换装置
CN109362169B (zh) * 2018-12-24 2024-08-09 中广核达胜加速器技术有限公司 一种电子加速器x射线转换靶的支承转换装置

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