CN114799800A - Target piece rapid dismounting device and method based on accelerator production isotope Ac-225 - Google Patents
Target piece rapid dismounting device and method based on accelerator production isotope Ac-225 Download PDFInfo
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- CN114799800A CN114799800A CN202210552184.7A CN202210552184A CN114799800A CN 114799800 A CN114799800 A CN 114799800A CN 202210552184 A CN202210552184 A CN 202210552184A CN 114799800 A CN114799800 A CN 114799800A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
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Abstract
The invention relates to a target piece quick dismounting device and a method for producing isotope Ac-225 based on an accelerator, wherein the target piece quick dismounting device comprises a rack, a shielding cover assembly body, a capsule target assembly, a shielding barreled body and an electric claw assembly body, the shielding cover assembly body, the capsule target assembly body, the shielding barreled body and the electric claw assembly body are arranged on the rack, the capsule target assembly body is taken out from the shielding cover assembly body and placed at the shielding barreled body by the electric claw assembly body based on remote control, and the capsule target assembly dismounting and the shielding transfer of a target piece can be realized by remotely controlling the electric claw assembly body by utilizing the matching between the capsule target assembly body and the shielding barreled body structure. The method of target transport includes transport of the capsule target assembly, disassembly, and sealed transport of the target. The invention does not need operators to operate on site and can realize high-energy proton spalling 232 Medical isotope for preparing Th target 225 Target irradiation, rapid disassembly, and transport of Ac.
Description
Technical Field
The invention relates to the technical field of isotope production, in particular to a target piece quick disassembling device and method for producing isotope Ac-225 based on an accelerator.
Background
With the development of nuclear medicine, α -targeted therapeutic drugs are increasingly gaining attention in the treatment of tumors. Compared with the beta nuclide commonly used for the radiotherapy in tumors at present, the alpha nuclide has the characteristics of high radiant energy, short range, strong radiobiological effect and cytotoxicity effect and the like, and has good application prospect for the radiotherapy in dispersive tumors and micrometastasis tumors. Among the alpha nuclides useful in radiotherapy, Ac-225 (C-C:) 225 Ac) are profound in tumor-targeted therapy studies, mainly because: 1) the half-life is 10.0d, and is suitable for targeted drug therapy; 2) the decay daughter is mostly alpha nuclide with short service life, the average energy is 5.8-8.4 MeV, and the linear energy transfer density in the tissue is very high; 3) the range in the tissue is 47-85 mu m, and the nano-particles can effectively kill cancer cells and have almost no side effect on surrounding normal tissues.
At present, the number of the current day, 225 the Ac is mainly derived from several pathways: 1) from 223 U-shaped body 229 Th preparation generator extraction: 229 Th→ 225 Ra→ 225 ac; 2) preparation of 226 Irradiation of the Ra target: 226 Ra(n，2n) 225 Ac、 226 Ra(p，2n) 225 Ac、 226 Ra(γ，n) 225 Ra→ 225 ac; 3) high energy proton spallation 232 A Th target: 232 Th(p，x) 225 ac, is used. Wherein the content of the first and second substances, 223 u is a fissile nuclear material, in very limited quantities worldwide, and is not readily available with strict controls on its use. 226 Ra has strong radioactivity, the manufacturing process of the target is difficult, and the target is expensive and not easy to obtain. While irradiating with high-energy proton beam (> 50MeV) 232 Preparation of Th 225 Ac is the most feasible.
Research in the prior art finds that the thorium target generally adopts Th simple substance and ThO 2 The powder is used as a target material, and the target piece is composed of a target material, a target seat, a target head and the like. The target seat is made of niobium or aluminum, and the target head gland is fixed by a titanium film or an aluminum film. After the irradiation experiment is finished, the dosage is required to be reduced to a certain level, and after personal protection is well done by workers, the workers can manually and quickly disassembleAnd (4) unloading the target, and transferring the target into a shielding barrel. However, this mode of operation causes the following problems: 1) the staff is exposed to a certain radiation dose during the target detachment process. If the irradiated target cannot be disassembled within the first time, the personal dose limit value possibly exceeds the standard, and potential harm is brought to the personal safety of operators; 2) waiting for cooling after irradiation results in a decrease in the yield of the target species 225 Ac.
Accordingly, there is an urgent need to develop a device and a method for rapidly disassembling a target so as to reduce the irradiation dose of workers during an irradiation experiment, protect the safety of operators, and improve the yield of target nuclides.
Disclosure of Invention
The invention aims to provide a target piece quick dismounting device and method for producing an isotope Ac-225 based on an accelerator, which aim to solve the problem that in the prior art, the target piece is difficult to dismount after an irradiation experiment due to the fact that a certain radiation dose is generated in the irradiation experiment process.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a target piece quick dismounting device and method for producing isotope Ac-225 based on an accelerator, which comprises the following steps:
a frame;
the shielding cover assembly is arranged on the frame, an openable shielding space is formed in the shielding cover assembly, and the shielding space is used for being in sealed butt joint with the accelerator terminal;
the capsule target assembly is arranged in the shielding space of the shielding cover assembly body and comprises a target piece pressing cylinder, a target piece fixing seat and a target piece, the target piece is placed on the target piece fixing seat, and the target piece pressing cylinder is sleeved on the target piece fixing seat and is connected with the target piece fixing seat in a screwing mode;
the shielding barreled body is arranged on the frame outside the shielding cover assembly body and comprises a capsule target fixing groove and a shielding barrel, and the capsule target fixing groove is matched with the target piece fixing seat;
the electric claw assembly body, the electric claw assembly body in the external mounting of shielding lid assembly body is in the frame, just the electric claw assembly body is used for receiving the electric control drive back, removes capsule target subassembly split on capsule target fixed slot to sealed target spare is to shielding in the bucket.
Further, the shield cover assembly body includes shield box, last shield cover and servo electric jar down, the shield box is the open box structure in top down, makes the inside of shield box down constitute the shielding space, the bottom of shield box is fixed in the frame through the underframe frame down, just the butt joint side of shield cover assembly body does the front side of shield box down, go up shield cover sliding connection under on the uncovered of shield box, just the slip direction of going up the shield cover does the fore-and-aft direction of shield box down, servo electric jar in the rear side of shield box is fixed in the frame down, and the output of servo electric jar is connected through driving the piece with last shield cover, wherein, on the outer wall of the upper shield cover left and right sides respectively the rigid coupling have the bearing gyro wheel of a plurality of contact in the frame.
Furthermore, the tank wall of the front side of the lower shielding box is provided with a hole communicated with the shielding space, the hole is connected with a front window assembly body used for butting the shielding space and the accelerator terminal through a supporting sleeve in a sealing manner, a target adjusting plate installed on the front tank wall of the lower shielding box is arranged at the hole in the shielding space, and a positioning hole for placing the capsule target assembly is formed in the position, corresponding to the hole, of the target adjusting plate.
Furthermore, the cross section of the lower shielding box is of a convex structure, so that a first step part is formed on the side box wall of the lower shielding box, a plurality of lifting ring plugs are installed on the horizontal table surface of the first step part, the box walls of the lower shielding box are all formed by metal plates through a sheet metal process, and lead layers are poured into the box walls of the lower shielding box.
Further, install in the shield cover assembly body and remove capsule target assembly body, it includes the base, removes seat and target spare cooling jacket to remove capsule target assembly body, the base is the level setting, it includes horizontal bedplate and the vertical bedplate of integrative "L" type to remove the seat, horizontal bedplate slidable mounting is on the base, vertical bedplate orientation the butt joint side in shielding space the fixed orifices has been seted up at the middle part of vertical bedplate, target spare cooling jacket nestification is in the fixed orifices, just capsule target subassembly in shielding space's butt joint side plug-in mounting is in the target spare cooling jacket the inside of target spare fixing base is formed with the cooling chamber, just the bottom surface of target spare fixing base has the accent that communicates the cooling chamber, the target spare cooling jacket is kept away from the one end of shielding space butt joint side is closed setting, just be equipped with respectively on the closed end of target spare cooling jacket and be used for external coolant liquid circulation system to communicate into the cooling chamber advance into The target piece cooling device comprises a gas pipe joint and a gas outlet pipe joint, wherein a shielding block is fixedly connected to the closed end of the target piece cooling sleeve.
Further, the both sides of base rigid coupling respectively have the guide rail, the bottom rigid coupling of horizontal bedplate has the slider of sliding connection on the guide rail, and the moving direction orientation that removes the seat the butt joint side in shielding space, two the middle part of slider is equipped with the gear, and the below of shielding lid assembly body is equipped with the assembly body that runs through, the assembly body that runs through includes driving motor, driving motor's output passes the base with the gear is connected, just the slider has towards the lateral wall rigid coupling of gear to be the rack that the meshing set up with the gear, wherein, on the base respectively in remove the gliding front end position of seat and the rear end position department rigid coupling of seat and have position sensor.
Furthermore, the target pressing cylinder is of a cylindrical structure with an open bottom, the target fixing seat is of a convex structure, a second step part is formed on the outer side wall of the target fixing seat, the target pressing cylinder is buckled on the second step part of the target fixing seat, a gap for clamping the target is formed between the top inner wall of the target pressing cylinder and the top end of the target fixing seat, a beam flow port for an accelerator to beam and strike the target is formed in the top wall of the target pressing cylinder, a C-shaped slotted hole with an opening facing the opening of the bottom of the target pressing cylinder is formed in the position, close to the bottom, of the wall of the target pressing cylinder, one end of the C-shaped slotted hole extends to the outer edge of the open bottom of the target pressing cylinder and forms a notch, and a first pin for sliding along the C-shaped slotted hole is fixed on the outer side wall of the target fixing seat above the second step part, and an O-shaped sealing ring sleeved on the target fixing seat at a second step part is arranged between the target pressing cylinder and the target fixing seat.
Furthermore, the shielding barreled body also comprises a disassembling bottom plate, a shielding barrel cover, a sealing tank, a portable barrel cover and a target sheet auxiliary mechanism, the disassembling bottom plate is horizontally fixed on the frame, the disassembling bottom plate is respectively provided with a slot position for placing the shielding barrel, the shielding barrel cover and the sealing tank, the capsule target fixing slot is arranged on the disassembling bottom plate, a second pin is fixedly connected in the capsule target fixing slot, the target piece fixing seat is provided with a pin hole for the second pin to be inserted in a matching way, the target sheet auxiliary mechanism is arranged on one side of the sealing tank and comprises a positioning plate, a fixing plate, a sliding rod and a funnel, the fixing plate is vertically fixed on the side edge of the disassembling bottom plate, the sliding rod is arranged above the disassembling bottom plate in parallel and is connected on the fixing plate in a sliding way, the positioning plate is horizontally arranged above the disassembling bottom plate, the positioning plate is fixedly connected with one end of the sliding rod, a placing hole is formed in the positioning plate, the funnel is fixed to the positioning plate along the placing hole, and the funnel is located right above the sealing tank.
Furthermore, a trolley support for driving the transfer trolley into is fixed on one side of the rack, and the electric claw assembly body comprises six mechanical arms arranged on the rack and electric clamping claws arranged at the tail ends of the six mechanical arms.
Based on the target piece rapid dismounting device for producing the isotope Ac-225 based on the accelerator, the invention also provides a target piece transferring method, which comprises the following steps:
manually arranging a shielding barrel assembly, wherein the shielding barrel, the shielding barrel cover, the sealing tank, the portable barrel and the portable barrel cover are respectively placed in corresponding groove positions on the dismounting bottom plate;
based on remote control, the upper shielding cover is controlled to move and the lower shielding box is opened, then the electric claw assembly body is controlled to take out the capsule target assembly from the lower shielding box and place the capsule target assembly into the capsule target fixing groove, at the moment, the electric clamping jaw of the electric claw assembly body is vertical to the capsule target assembly, then the electric claw assembly body is controlled to enable the electric clamping jaw to be consistent with the capsule target assembly in direction, the target piece pressing cylinder is rotated and opened, and the capsule target assembly is disassembled;
after the capsule target assembly is disassembled, controlling the electric claw assembly body to open the sealing tank, shifting the target sheet auxiliary mechanism to enable the funnel to move right above the sealing tank, then controlling the electric claw assembly body to grab the target piece fixing seat to slowly move to the upper side of the funnel, rotating the target piece fixing seat until the irradiated target piece is guided into the sealing tank through the funnel, and covering the sealing tank to finish the sealing of the target piece;
after the target is sealed, controlling an electric claw assembly body to grab a sealing tank and place the sealing tank into a shielding cylinder, grabbing a shielding barrel cover to seal the shielding cylinder, grabbing the shielding cylinder and place the shielding cylinder into a portable barrel, grabbing a portable barrel cover to seal the portable barrel, grabbing the portable barrel and placing the portable barrel on a transfer trolley on one side of a rack to complete shielding transfer of the target;
after the target is transferred to the transfer trolley, the worker pushes the transfer trolley to the heating chamber to perform dissolution and separation of the target after irradiation.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the target quick dismounting device designed by the invention can realize high-energy proton spallation 232 Medical isotope for preparing Th target 225 Irradiation, rapid disassembly and transportation of Ac target pieces;
2. the target quick dismounting device does not need to be operated by an operator on site, can reduce the irradiation dose of the operator in the irradiation experiment process, and protects the safety of the operator;
3. the target quick dismounting device designed by the invention can finish dismounting the target in a very short time (less than 30min) after irradiation is finished, separation is carried out after the radiation dose of the target is reduced without cooling for several days, and the target nuclide can be improved 225 Yield of Ac.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic overall structure diagram of a target quick detaching device provided in an embodiment of the present invention;
FIG. 2 is a schematic view of the assembly structure of the moving capsule target assembly and the penetration assembly of the target quick-detaching device provided by the embodiment of the invention;
FIG. 3 is a schematic structural view of a shield cap assembly of a target quick release apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a lower shielding box of a target quick detaching device according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a lower shielding box of a target quick detaching device according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a movable capsule target assembly of the target quick detaching device according to the embodiment of the present invention;
FIG. 7 is a schematic view of the internal structure of a capsule target assembly of a target quick-detaching device according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the overall structure of a capsule target assembly of a target quick-detaching device provided by the embodiment of the invention;
fig. 9 is a schematic structural diagram of a shielding barrel assembly of a target quick detaching device according to an embodiment of the present invention.
The reference symbols in the drawings denote the following:
1. a frame; 2. a shield cover assembly; 21. a lower shielding box; 211. a bottom frame; 22. an upper shield cover; 221. a load-bearing roller; 23. a servo electric cylinder; 231. driving the block; 24. a support sleeve; 25. a front window assembly; 26. a target adjusting plate; 27. plugging by a hoisting ring; 3. a capsule target assembly; 31. pressing the target piece into a cylinder; 311. a beam port; 312. a "C" shaped slot; 32. a target fixing seat; 321. a first pin; 322. a cooling chamber; 33. a target; 34. an O-shaped sealing ring; 4. shielding the barreled ligand; 41. a shielding barrel; 42. disassembling the bottom plate; 43. a shielding barrel cover; 44. sealing the tank; 45. carrying the barrel by hand; 46. carrying out barrel cover lifting; 47. a target sheet assisting mechanism; 471. positioning a plate; 472. a fixing plate; 473. a slide bar; 474. a funnel; 5. an electrical jaw assembly; 6. moving the capsule target assembly; 61. a base; 62. a movable seat; 621. a horizontal seat plate; 622. a vertical seat plate; 63. a target cooling jacket; 631. a shielding block; 64. a guide rail; 65. a slider; 66. a gear; 67. a rack; 68. a position sensor; 69. an air inlet pipe joint; 7. a through-module assembly; 8. a trolley bracket.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Because certain radiation dose can be produced in the irradiation experiment process in the prior art, the situation that the target is difficult to manually disassemble after the irradiation experiment is easily caused. Therefore, the invention provides a target piece quick dismounting device and method for producing isotope Ac-225 based on an accelerator 225 Ac's target piece quick dismounting device and method, through set up shield cover assembly body, capsule target subassembly, shield barreled body and electric claw assembly body in the frame, based on remote control, take out and place the capsule target subassembly in shield cover assembly body and shield barreled body department by electric claw assembly body, utilize cooperation between capsule target subassembly and the shield barreled body structure, make dismantling of capsule target subassembly and shielding transportation of target piece all can realize the operation through the electric claw assembly body of remote control, need not operating personnel at the on-the-spot operation, and can realize high-energy proton spallation 232 Medical isotope for preparing Th target 225 Ac target irradiation and rapid disassemblyUnloading and transferring.
The embodiment of the present invention will be described in detail by examples.
Examples
As shown in fig. 1 and fig. 2, the present invention provides a target member quick disassembling apparatus based on accelerator isotope Ac-225 production, which includes a frame 1, a shielding cover assembly 2, a capsule target assembly 3, a shielding barrel assembly 4, and an electric claw assembly 5, and is specifically configured as follows:
the frame 1 provides support for all functional parts of the whole target quick disassembling device. The shielding cover assembly 2 is disposed on the frame 1, and a shielding space which can be opened and closed is provided in the shielding cover assembly 2, so that the shielding space is used for being in sealed butt joint with the accelerator terminal. As shown in fig. 3, specifically, the shield cover assembly 2 includes a lower shield case 21, an upper shield cover 22, and a servo cylinder 23. The lower shielding box 21 has a box structure with an open top, so that the interior of the lower shielding box 21 forms a shielding space. The bottom of the lower shield box 21 is fixed to the frame 1 by the bottom frame 211, and the abutting side of the shield cover assembly 2 is the front side of the lower shield box 21. The upper shield cover 22 is slidably connected to the opening of the lower shield box 21, and the sliding direction of the upper shield cover 22 is the front-rear direction of the lower shield box 21. The servo electric cylinder 23 is fixed on the frame 1 at the rear side of the lower shielding box 21, and the output end of the servo electric cylinder 23 is connected with the upper shielding cover 22 through the driving block 231. Through the setting of this structure, the operation of servo electric cylinder 23 of accessible remote control drives the front and back slip of upper shield cover 22 to the closure of shielding case 21 is opened under the control, in order to realize the shield switch. The walls of the lower shielding box 21 are all made of metal plates and formed by a sheet metal process, and lead layers are filled in the walls of the lower shielding box 21, so that the shielding cover assembly 2 can play a certain shielding and protecting effect on generated radioactive elements in the irradiation process by utilizing the characteristics of lead.
Furthermore, a plurality of bearing rollers 221 contacting the frame 1 are respectively fixed on the outer walls of the left and right sides of the upper shielding cover 22. With this arrangement, the upper shield cover 22 can be moved smoothly.
Further, as shown in fig. 4 and 5, an opening communicating with the shielding space is provided in the wall on the front side of the lower shielding box 21, and a front window assembly 25 for abutting the shielding space and the accelerator terminal is sealingly connected to the opening through a support sleeve 24. A target adjusting plate 26 arranged on the front box wall of the lower shielding box 21 is also arranged at the position of the opening in the shielding space, and a positioning hole for placing the capsule target assembly 3 is formed in the position, corresponding to the opening, of the target adjusting plate 26. When the capsule target assembly 3 moves towards the accelerator end in the shielded space, the positioning hole on the target-through adjusting plate 26 ensures that the capsule target assembly 3 is in concentric butt joint with the front window assembly 25. Preferably, the cross section of the lower shielding box 21 is in a convex structure, so that a first step part is formed on the side box wall of the lower shielding box 21, a plurality of lifting ports are formed on the horizontal table surface of the first step part, the lifting ports are provided with lifting ring plugs 27, and the lifting ring plugs 27 mainly fill the compensation shielding effect after the lifting ports are lifted.
As described above, with reference to fig. 1 and 6, the movable capsule target assembly 6 is mounted in the shield cover assembly 2, and the movable capsule target assembly 6 includes the base 61, the movable seat 62, and the target cooling jacket 63. The base 61 is disposed horizontally, and the movable seat 62 includes a horizontal seat plate 621 and a vertical seat plate 622 that are integrated into an "L" shape. The horizontal seat plate 621 is slidably mounted on the base 61 with the vertical seat plate 622 facing the docking side of the shielded space. A fixing hole is formed in the middle of the vertical seat plate 622, the target cooling sleeve 63 is nested in the fixing hole, and the capsule target assembly 3 is inserted in the target cooling sleeve 63 at the butt joint side of the shielding space. Guide rails 64 are fixed to both sides of the base 61, a slider 65 slidably coupled to the guide rails 64 is fixed to the bottom of the horizontal seat plate 621, and the moving direction of the moving seat 62 faces the abutting side of the shielding space. A gear 66 is arranged in the middle of the two sliding blocks 65, a penetrating component assembly 7 (see fig. 2) is arranged below the shielding cover assembly 2, the penetrating component assembly 7 comprises a driving motor, the output end of the driving motor penetrates through the base 61 to be connected with the gear 66, and a rack 67 meshed with the gear 66 is fixedly connected to the side wall of the sliding block 65 facing the gear 66. Through the setting of this structure, the usable driving motor who runs through subassembly assembly body 7 drives, through the cooperation of gear 66 and rack 67, drives and removes seat 62 and remove along guide rail 64 to drive capsule target subassembly 3 to accelerator terminal motion. Wherein, there are position sensors 68 respectively fixed on the base 61 at the sliding front stop position and the rear stop position of the moving seat 62, and by the arrangement of the two position sensors 68, the capsule target assembly 3 is ensured to be stably butted with the front window assembly 25 after moving, and the capsule target assembly 3 is prevented from moving excessively.
Preferably, a shielding box spacer with a 180 ° bend angle is further provided in the lower shielding box 21 for routing the moving capsule target assembly 6.
As shown in fig. 7 and 8, the capsule target assembly 3 is installed in the shielding space of the shielding cover assembly 2, and includes a target pressing cylinder 31, a target fixing seat 32 and a target 33, the target 33 is placed on the target fixing seat 32, and the target pressing cylinder 31 is sleeved on the target fixing seat 32 and connected with the target fixing seat 32 in a screwing manner. Specifically, the target pressing cylinder 31 is a cylindrical structure with an open bottom, and the target fixing seat 32 is in a structure like a Chinese character 'tu', so that a second step part is formed on the outer side wall of the target fixing seat 32. The target pressing cylinder 31 is buckled on the second step part of the target fixing seat 32, a gap for clamping the target 33 is formed between the top inner wall of the target pressing cylinder 31 and the top end of the target fixing seat 32, and a beam flow port 311 for hitting an accelerator beam on the target 33 is formed in the top wall of the target pressing cylinder 31. Through the setting of this structure, utilize the cooperation of target pressure cylinder 31 and target fixing base 32, make target pressure cylinder 31 can compress tightly target 33 on target fixing base 32. Wherein, the wall of the target pressing cylinder 31 near the bottom thereof is provided with a "C" shaped slot 312 with an opening facing the bottom opening of the target pressing cylinder 31, and one end of the "C" shaped slot 312 extends to the outer edge of the bottom opening of the target pressing cylinder 31 and forms a notch. A first pin 321 for sliding along the C-shaped slot 312 is fixed on the outer side wall of the target holder 32 above the second step, and an O-ring 34 sleeved on the target holder 32 at the second step is arranged between the target pressing cylinder 31 and the target holder 32. Through the setting of this structure, put into target fixing base 32 with target 33 earlier, press a section of thick bamboo 31 lock and push down on target fixing base 32 through pressing the target, make target 33 compressed tightly, and make first pin 321 slide in "C" type slot hole 312 along the breach, continue to keep pressing target pressure section of thick bamboo 31 down, and rotatory pressure target pressure section of thick bamboo 31, make first pin 321 slide to the other end that the breach was kept away from to "C" type slot hole 312 along "C" type slot hole 312, because "O" type sealing washer 34 has certain elasticity, the power is interact, loosen target pressure section of thick bamboo 31 this moment, "O" type sealing washer 34 will provide certain pretightning force for target pressure section of thick bamboo 31, prevent that target pressure section of thick bamboo 31 can the reverse slip lead to coming off. Preferably, a graphite block with the diameter of 10cm and the height of 10cm is arranged right behind the capsule target assembly 3 and perpendicular to the beam line direction of the accelerator, and is used for shielding high-energy protons.
Further, as shown in fig. 6 and 7, a cooling chamber 322 is formed inside the target holder 32, and a bottom surface of the target holder 32 has a port communicating with the cooling chamber 322. Wherein, the one end that shielding space butt joint side was kept away from to target cooling jacket 63 is the closed setting, and is equipped with respectively on the closed end of target cooling jacket 63 and is used for the air inlet pipe joint 69 and the coupling of giving vent to anger that external coolant liquid circulation system feeds into the cooling chamber. Through the arrangement of the structure, in the irradiation experiment process, the external cooling circulating water machine can be opened, and the cooling circulating water flows into the cooling cavity 322 of the target fixing seat 32 through the pipeline, so that the capsule target assembly 3 in the irradiation process is cooled, the target quick dismounting device designed by the invention can finish dismounting the target in a very short time (less than 30min) after irradiation is finished, separation is not needed after the radiation dose of the target is reduced after cooling for several days, and the target nuclide is effectively improved 225 Yield of Ac. Preferably, the closed end of the target cooling jacket 63 is fixedly connected with a shielding block 631, and the shielding block 631 is made of lead, so that radioactive elements generated in the irradiation process can play a certain shielding and protecting role. In addition, when the capsule target assembly 3 is installed in place, the cooling water can be prevented from flowing outwards through the close fit between the target cooling sleeve 63 and the circumferential surface of the target fixing seat 32.
Referring to fig. 1 and 9, the shield barrel assembly 4 is mounted on the frame 1 outside the shield cover assembly 2, and includes a capsule target fixing groove and a shield barrel 41, and the capsule target fixing groove is matched with the target fixing seat 32. Specifically, the shielding barrel assembly 4 further comprises a dismounting bottom plate 42, a shielding barrel cover 43, a sealing can 44, a portable barrel 45, a portable barrel cover 46 and a target sheet auxiliary mechanism 47. Dismantle bottom plate 42 level and fix in frame 1, and dismantle and offer respectively on the bottom plate 42 and supply shielding bucket 41, the trench that shielding bucket lid 43 and seal pot 44 placed, capsule target fixed slot also sets up on dismantling bottom plate 42, and the rigid coupling has the second pin in the capsule target fixed slot, and offer on target fixing base 32 and supply second pin cooperation male pinhole, so that place capsule target subassembly 3 in capsule target fixed slot back, through the cooperation of capsule target fixed slot and target fixing base 32, fix capsule target subassembly 3. The target assisting mechanism 47 is disposed on one side of the airtight tank 44 and includes a positioning plate 471, a fixing plate 472, a slide bar 473, and a funnel 474. The fixing plate 472 is vertically fixed on the side of the detaching base plate 42, and the slide bar 473 is disposed in parallel above the detaching base plate 42 and slidably connected to the fixing plate 472. The positioning plate 471 is horizontally disposed above the detachable bottom plate 42, and the positioning plate 471 is fixedly connected to one end of the sliding rod 473. A positioning hole is formed in the positioning plate 471, and the funnel 474 is fixed to the positioning plate 471 along the positioning hole, and the funnel 474 is located directly above the airtight tank 44. Through the setting of this structure, only need place capsule target fixed slot with capsule target subassembly 3, rotate the certain angle of target piece pressure section of thick bamboo 31 and disassemble capsule target subassembly 3, stir target piece complementary unit 47, be located seal pot 44 directly over funnel 474, with target piece 33 on the target piece fixing base 32 along the leading-in seal pot 44 of funnel 474, put into shielding bucket 41 with seal pot 44 again, put into hand bucket 45 with shielding bucket 41 afterwards in, put into the transportation dolly with hand bucket 45 again, in order to realize the irradiation test back, the sealed and the shielding of target piece are transported.
The sealed tank 44 is made of polytetrafluoroethylene, and has two structures of a tank body and a sealed cover, the sealing performance of the sealed tank is ensured by a sealing ring between the sealed cover and the tank body, and the outer layer of the sealed tank 44 is made of metal lead and can shield rays released by the target after irradiation.
As described above, referring back to fig. 1, a trolley support 8 into which the transfer trolley is driven is fixed to one side of the frame 1. The electric claw assembly 5 is mounted on the frame 1 outside the shield cover assembly 2, and comprises six mechanical arms mounted on the frame 1 and electric clamping jaws mounted at the tail ends of the six mechanical arms. After the capsule target assembly is driven by an electric controller, the capsule target assembly 3 is moved to be detached from the capsule target fixing groove, and the target piece is sealed in the shielding barrel 41. The transportation and disassembly of the capsule target assembly 3 and the sealed transportation process of the target piece 33 are realized by remotely controlling the electric claw assembly 5. It should be noted that the six-axis mechanical arm is an existing conventional six-degree-of-freedom mechanical arm, which is fixed on the frame 1, and the existing conventional electric clamping jaw is configured at the tail end of the six-axis mechanical arm, so that the electric clamping jaw assembly 5 clamps the capsule target assembly 3 to transfer between different stations.
Preferably, the circumferential surface of the bottom of the target holder 32 has two flat surfaces, so that the capsule target assembly 3 can be held by the electric jaws of the electric jaw assembly 5. The target piece quick dismounting device comprises a shielding cover assembly body 2, a capsule target assembly body 3, an electric claw assembly body 5 and the like, is arranged on a frame 1 in an embedding mode, the capsule target assembly body 3 and related parts thereof are arranged in the shielding cover assembly body 2, and driving components such as the electric claw assembly body 5 and the like are arranged outside the shielding cover assembly body 2, so that the harm of radiation to automation equipment and operators is effectively reduced.
Based on the target piece quick dismounting device for producing the isotope Ac-225 based on the accelerator, the invention also provides a target piece transferring method, which comprises the following steps:
manually arranging a shielding barrel assembly 4, including placing a shielding barrel 41, a shielding barrel cover 43, a sealing can 44, a portable barrel 45 and a portable barrel cover 46 in corresponding slot positions on a disassembly bottom plate 42 respectively;
based on remote control, the upper shielding cover 22 is controlled to move and the lower shielding box 21 is opened, then the electric claw assembly 5 is controlled to take out the capsule target assembly 3 from the lower shielding box 21 and place the capsule target assembly 3 into a capsule target fixing groove, at the moment, the electric clamping jaw of the electric claw assembly 5 is vertical to the capsule target assembly 3, then the electric claw assembly 5 is controlled to enable the electric clamping jaw to be consistent with the capsule target assembly 3 in direction, the target piece pressing barrel 31 is rotated and opened, and the capsule target assembly 3 is disassembled;
after the capsule target assembly 3 is disassembled, controlling the electric claw assembly 5 to open the sealing tank 44, shifting the target sheet auxiliary mechanism 47 to enable the funnel 474 to move to the position right above the sealing tank 44, then controlling the electric claw assembly 5 to pick up the target piece fixing seat 32 and slowly move to the position above the funnel 474, rotating the target piece fixing seat 32 until the irradiated target piece 33 is guided into the sealing tank 44 through the funnel 474, and covering the sealing tank 44 to finish the sealing of the target piece 33;
after the target member 33 is sealed, the electric claw assembly body 5 is controlled to grab a sealing tank 44 and put into a shielding cylinder 41, grab a shielding cylinder cover 43 and seal the shielding cylinder 41, grab the shielding cylinder 41 and put into a portable barrel 45, grab a portable barrel cover 46 and seal the portable barrel 45, grab the portable barrel 45 and put on a transfer trolley on one side of the rack 1, and finish the shielding transfer of the target member 33;
after the target 33 is transferred to the transfer trolley, the worker pushes the transfer trolley to the heating chamber to perform the dissolution and separation of the target after irradiation.
The invention relates to a target piece rapid dismounting device and method based on an accelerator for producing isotope Ac-225 225 Ac's target piece quick dismounting device and method, through set up shielding lid assembly body 2, capsule target subassembly 3, shielding barreled ligand 4 and electric claw assembly body 5 on frame 1, based on remote control, take out capsule target subassembly 3 from shielding lid assembly body 2 and place in shielding barreled ligand 4 department by electric claw assembly body 5, utilize cooperation between capsule target subassembly 3 and the shielding barreled ligand 4 structure, make the dismantling of capsule target subassembly 3 and the shielding transportation of target piece 33 all can realize the operation through remote control electric claw assembly body 5, need not operating personnel at the on-the-spot operation, and can realize high-energy proton spallation 232 Medical isotope for preparing Th target 225 Target irradiation, rapid disassembly, and transport of Ac.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A target quick disassembling device for producing isotope Ac-225 based on an accelerator is characterized by comprising:
a frame;
the shielding cover assembly is arranged on the frame, an openable shielding space is formed in the shielding cover assembly, and the shielding space is used for being in sealed butt joint with the accelerator terminal;
the capsule target assembly is arranged in the shielding space of the shielding cover assembly body and comprises a target piece pressing cylinder, a target piece fixing seat and a target piece, the target piece is placed on the target piece fixing seat, and the target piece pressing cylinder is sleeved on the target piece fixing seat and is connected with the target piece fixing seat in a screwing mode;
the shielding barreled body is arranged on the frame outside the shielding cover assembly body and comprises a capsule target fixing groove and a shielding barrel, and the capsule target fixing groove is matched with the target piece fixing seat;
the electric claw assembly body, the electric claw assembly body in the external mounting of shielding lid assembly body is in the frame, just the electric claw assembly body is used for receiving the electric control drive back, removes capsule target subassembly split on capsule target fixed slot to sealed target spare is to shielding in the bucket.
2. The device for rapidly disassembling the target object based on the accelerator production isotope Ac-225 of claim 1, wherein: the utility model discloses a shield cover assembly, including lower shield box, last shield cover and servo electric jar, the shield box is the open box structure in top down, makes the inside constitution shielding space of shield box down, the bottom of shield box is passed through the underframe and is fixed in the frame down, just the butt joint side of shield cover assembly body does the front side of shield box down, go up shield cover sliding connection under on the uncovered of shield box, just the slip direction of going up the shield cover does the fore-and-aft direction of shield box down, servo electric jar in the rear side of shield box is fixed in the frame down, and the output of servo electric jar is connected through driving the piece with last shield cover, wherein, on the outer wall of the upper shield cover left and right sides respectively the rigid coupling have the bearing gyro wheel of a plurality of contact in the frame.
3. The device for rapidly disassembling the target object based on the accelerator production isotope Ac-225 of claim 2, wherein: be equipped with the trompil that communicates shielding space on the tank wall of shield box front side down, and trompil department has the front window assembly body that is used for butt joint shielding space and accelerator terminal through supporting sleeve sealing connection the shielding space is interior to be equipped with the target adjusting plate of installation on shield box front tank wall down in trompil department, the confession has been seted up to the position that corresponds the trompil on the target adjusting plate the locating hole that capsule target subassembly was put into.
4. The device for rapidly disassembling the target based on the accelerator production isotope Ac-225 of claim 2 or 3, wherein: the cross section of the lower shielding box is of a convex structure, a first step part is formed on the side box wall of the lower shielding box, a plurality of lifting ring plugs are installed on the horizontal table surface of the first step part, the box wall of the lower shielding box is formed by metal plates through a sheet metal process, and a lead layer is poured into the box wall of the lower shielding box.
5. The device for rapidly disassembling the target object based on the accelerator production isotope Ac-225 of claim 1, wherein: install in the shield cover assembly body and remove capsule target assembly body, it includes base, removal seat and target piece cooling jacket to remove capsule target assembly body, the base is the level setting, it includes horizontal bedplate and the vertical bedplate of integrative "L" type to remove the seat, horizontal bedplate slidable mounting is on the base, vertical bedplate orientation the butt joint side in shielding space the fixed orifices has been seted up at the middle part of vertical bedplate, target piece cooling jacket nestification is in the fixed orifices, just capsule target subassembly in shielding space's butt joint side is in the target piece cooling jacket the inside of target piece fixing base is formed with the cooling chamber, just the bottom surface of target piece fixing base has the accent that communicates the cooling chamber, the target piece cooling jacket is kept away from the one end of shielding space butt joint side is closed setting, just be equipped with respectively on the closed end of target piece cooling jacket and be used for coolant liquid circulation system to communicate into the admission line connector and the target piece cooling chamber And the closed end of the target cooling sleeve is fixedly connected with a shielding block.
6. The device of claim 5, wherein the device for rapidly disassembling the target for producing the isotope Ac-225 by using the accelerator comprises: the both sides of base rigid coupling respectively have the guide rail, the bottom rigid coupling of horizontal bedplate has the slider of sliding connection on the guide rail, and the moving direction orientation that removes the seat the butt joint side in shielding space, two the middle part of slider is equipped with the gear, and the below of shielding lid assembly body is equipped with the assembly body that runs through, the assembly body that runs through includes driving motor, driving motor's output passes the base with the gear is connected, just the slider towards the lateral wall rigid coupling of gear have with the gear be the rack that the meshing set up, wherein, on the base respectively in it has position sensor to remove the gliding front end position of seat and the rigid coupling of back end position department.
7. The device for rapidly disassembling the target object based on the accelerator for producing the isotope Ac-225 of claim 1, 3 or 5, wherein: the target pressing cylinder is of a cylindrical structure with an open bottom, the target fixing seat is of a convex structure, a second step part is formed on the outer side wall of the target fixing seat, the target pressing cylinder is buckled on the second step part of the target fixing seat, a gap for clamping a target is formed between the top inner wall of the target pressing cylinder and the top end of the target fixing seat, a beam flow port for an accelerator to beam and strike the target is formed in the top wall of the target pressing cylinder, a C-shaped slotted hole with an opening facing the opening of the bottom of the target pressing cylinder is formed in the position, close to the bottom, of the wall of the target pressing cylinder, one end of the C-shaped slotted hole extends to the outer edge of the open bottom of the target pressing cylinder and forms a notch, and a first pin for sliding along the C-shaped slotted hole is fixed on the outer side wall of the target fixing seat above the second step part, and an O-shaped sealing ring sleeved on the target fixing seat at a second step part is arranged between the target pressing cylinder and the target fixing seat.
8. The device for rapidly disassembling the target object based on the accelerator production isotope Ac-225 of claim 1, wherein: the shielding barrel assembly further comprises a disassembling bottom plate, a shielding barrel cover, a sealing tank, a portable barrel cover and a target sheet auxiliary mechanism, wherein the disassembling bottom plate is horizontally fixed on the frame, groove positions for placing the shielding barrel, the shielding barrel cover and the sealing tank are respectively arranged on the disassembling bottom plate, a capsule target fixing groove is arranged on the disassembling bottom plate, a second pin is fixedly connected in the capsule target fixing groove, a pin hole for the second pin to be inserted in a matched mode is formed in the target piece fixing seat, the target sheet auxiliary mechanism is arranged on one side of the sealing tank and comprises a positioning plate, a fixed plate, a sliding rod and a funnel, the fixed plate is vertically fixed on the side edge of the disassembling bottom plate, the sliding rod is arranged above the disassembling bottom plate in parallel and is connected to the fixed plate in a sliding mode, and the positioning plate is horizontally arranged above the disassembling bottom plate, the positioning plate is fixedly connected with one end of the sliding rod, a placing hole is formed in the positioning plate, the funnel is fixed to the positioning plate along the placing hole, and the funnel is located right above the sealing tank.
9. The device for rapidly disassembling the target object based on the accelerator production isotope Ac-225 of claim 1, wherein: one side of the rack is provided with a trolley support fixed with a transfer trolley, and the electric claw assembly body comprises six mechanical arms arranged on the rack and electric clamping jaws arranged at the tail ends of the six mechanical arms.
10. A method for transporting a target, which uses the accelerator-based device for rapidly disassembling a target for producing isotope Ac-225 according to claims 1-9, the method comprising:
manually arranging a shielding barrel assembly, wherein the shielding barrel, the shielding barrel cover, the sealing tank, the portable barrel and the portable barrel cover are respectively placed in corresponding groove positions on the dismounting bottom plate;
based on remote control, the upper shielding cover is controlled to move and the lower shielding box is opened, then the electric claw assembly body is controlled to take out the capsule target assembly from the lower shielding box and place the capsule target assembly into the capsule target fixing groove, at the moment, the electric clamping jaw of the electric claw assembly body is perpendicular to the capsule target assembly, then the electric claw assembly body is controlled to enable the direction of the electric clamping jaw to be consistent with that of the capsule target assembly, the target member pressing cylinder is rotated and opened, and the capsule target assembly is disassembled;
after the capsule target assembly is disassembled, controlling the electric claw assembly body to open the sealing tank, shifting the target sheet auxiliary mechanism to enable the funnel to move right above the sealing tank, then controlling the electric claw assembly body to grab the target piece fixing seat to slowly move to the upper side of the funnel, rotating the target piece fixing seat until the irradiated target piece is guided into the sealing tank through the funnel, and covering the sealing tank to finish the sealing of the target piece;
after the target is sealed, controlling an electric claw assembly body to grab a sealing tank and place the sealing tank into a shielding cylinder, grabbing a shielding barrel cover to seal the shielding cylinder, grabbing the shielding cylinder and place the shielding cylinder into a portable barrel, grabbing a portable barrel cover to seal the portable barrel, grabbing the portable barrel and placing the portable barrel on a transfer trolley on one side of a rack to complete shielding transfer of the target;
after the target is transferred to the transfer trolley, the worker pushes the transfer trolley to the heating chamber to perform dissolution and separation of the target after irradiation.
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| CN202210552184.7A CN114799800B (en) | 2022-05-20 | 2022-05-20 | Target rapid disassembly device and method for producing isotope Ac-225 based on accelerator |
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| CN202210552184.7A CN114799800B (en) | 2022-05-20 | 2022-05-20 | Target rapid disassembly device and method for producing isotope Ac-225 based on accelerator |
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| CN117718761A (en) * | 2023-12-28 | 2024-03-19 | 中乌先楚核能科技有限公司 | Nuclear medicine target disassembling equipment |
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