Target device for isotope production

Abstract

The invention relates to the technical field of isotope production equipment, in particular to a target device for isotope production, which comprises a target chamber and a target assembly, the target chamber is provided with an inner cavity, and a plurality of beam holes arranged in an array are formed in the face, facing beam current, of the target chamber. The beam holes are covered with target windows. The target assembly is inserted into the target chamber and comprises a target frame and a target capsule; the target frames and the target windows are arranged in a one-to-one correspondence manner, and at least one mounting position for mounting the target capsule is arranged in each target frame in the axial direction of the beam hole; openings are formed in the two sides of each target frame, the side openings of the multiple target frames correspond to one another and define an independent cooling liquid flow channel with the inner wall of the target chamber, and gaps are formed in the two sides, in the axial direction of the beam hole, of each target capsule and used for allowing cooling liquid to flow through. A detachable cover plate assembly is arranged at the top of the target chamber, and the target assembly is integrally sealed in the target chamber in an assembling state. The scheme is used for solving the defects that the target assembly is inconvenient to disassemble and assemble, the safety is low and the cooling water sealing is difficult to guarantee in a high-radiation dose environment.

Description

Technical Field

[0001] The invention relates to the technical field of isotope production equipment, and in particular to a target device for isotope production. Background Art

[0002] With the development of modern medicine and nuclear medicine technology, medical radioisotopes play an increasingly important role in disease diagnosis and clinical treatment. There are three main ways to produce these isotopes: reactors, accelerators, and isotope generators. Irradiating targets with high-energy proton accelerators is an efficient way to achieve large-scale isotope production, which can not only greatly improve production efficiency, but also significantly reduce overall costs.

[0003] The Institute of Modern Physics of the Chinese Academy of Sciences has made a breakthrough of 10 mA in superconducting linear accelerator technology, laying a solid foundation for large-scale isotope production based on accelerators. Increasing the beam intensity to above the milliampere level can significantly increase the total isotope production. However, under high energy and high current conditions, the beam will produce extremely high online and offline radiation doses after hitting the target. Even when the beam is stopped and the target vehicle is moved from the irradiation room to the hot room for target assembly disassembly, the radiation dose around the target device can still reach about 10 8 μSv / h, which is a relatively high radiation level. Since all operations in the hot chamber need to be completed by remote control with the help of master-slave manipulators, power manipulators, robots or other electric tools, how to quickly, conveniently, safely and reliably realize the removal and installation of target assemblies and target pieces, as well as the replacement of target chambers in a high radiation environment, and ensure the safety of cooling water sealing, has become an urgent problem to be solved. Summary of the invention

[0004] The present invention provides a target device for isotope production, which is used to solve the defects of the prior art in that the target assembly is inconvenient to disassemble and install in a high radiation dose environment, the safety is low, and the cooling water seal is difficult to ensure, so as to achieve fast, convenient, safe and reliable disassembly and installation of the target assembly and target piece and replacement of the target chamber, and ensure the safety of the cooling water seal.

[0005] The present invention provides a target device for isotope production, comprising: a target chamber and a target assembly; the target chamber has an inner cavity and a side thereof facing a beam is provided with a plurality of beam holes arranged in an array, and the beam holes are covered with target windows; the target assembly is inserted into the target chamber, and the target assembly comprises a target frame and a target capsule; the target frame and the target window are arranged in a one-to-one correspondence, and in the axial direction of the beam hole, at least one mounting position for mounting a target capsule is provided in the target frame; openings are provided on both sides of the target frame, and the side openings of the plurality of target frames correspond to each other and enclose an independent coolant flow channel with the inner wall of the target chamber, and each target capsule has gaps on both sides along the axial direction of the beam hole for coolant to flow through; a detachable cover plate assembly is provided on the top of the target chamber, and in an assembled state, the cover plate assembly seals the target assembly as a whole in the target chamber.

[0006] According to one embodiment of the present invention, the target assembly includes a positioning platform arranged on the top of the target frame; a six-sided column is provided on the upper end surface of the positioning platform, which is used to clamp the six-sided column by a robot to achieve installation or disassembly of the target assembly; a blocking plate is provided on the top of the six-sided column, and the blocking plate is used to prevent the robot from slipping during the clamping process.

[0007] According to one embodiment of the present invention, the cover plate assembly comprises a target cover plate, a sealing groove is provided on the bottom surface of the target cover plate, and a reusable flexible graphite gasket is installed in the sealing groove.

[0008] According to one embodiment of the present invention, a plurality of rotary locking clamps are provided on the edge of the target cover plate, the locking handle of the rotary locking clamp is located above the target cover plate, and the locking plate of the rotary locking clamp is located below the target cover plate; a semicircular fixing ear is provided on the outer side of the flexible graphite gasket, and the semicircular fixing ear is clamped on the bottom of the target cover plate through the locking plate; when the flexible graphite gasket needs to be replaced, the locking handle is rotated to an unlocking angle by a robot, and the flexible graphite gasket automatically falls off.

[0009] According to one embodiment of the present invention, the target cover plate is provided with a plurality of first locking studs, and the target chamber is provided with threaded holes corresponding thereto.

[0010] According to one embodiment of the present invention, a first positioning column is provided on the target cover plate, and is used for positioning and matching with the positioning hole of the target chamber through the first positioning column when installing the target cover plate.

[0011] According to one embodiment of the present invention, a mushroom head lifting lug is provided on the upper surface of the target cover plate, so as to realize the positioning, remote disassembly and installation of the target cover plate through a lifting device.

[0012] According to one embodiment of the present invention, a water inlet diversion pipe and a water outlet diversion pipe are respectively provided on both sides of the target chamber; a water inlet box and a water outlet box are respectively provided on the outer sides of the water inlet diversion pipe and the water outlet diversion pipe; the top cross-sectional area of ​​the water inlet box and the water outlet box is half of the bottom cross-sectional area, and the outer side surfaces of the water inlet box and the water outlet box are both inclined surfaces; a first lifting ear is provided on the water inlet box, and a second lifting ear is provided on the water outlet box, and by lifting the first lifting ear and the second lifting ear, the overall lifting of the target device can be achieved.

[0013] According to one embodiment of the present invention, the lower ends of the water inlet box and the water outlet box are respectively provided with a water inlet pipe and a water outlet pipe of the coolant flow channel, and the target device is connected to the target vehicle through the water inlet pipe and the water outlet pipe; the water inlet pipe and the water outlet pipe on the target device are respectively welded with a water inlet upper flange and a water outlet upper flange at the lower ends, and the water inlet channel and the water outlet channel of the target vehicle are respectively welded with a water inlet lower flange and a water outlet lower flange at the upper ends; sealing rings are respectively arranged between the water inlet upper flange and the water outlet upper flange and the water inlet lower flange and the water outlet lower flange.

[0014] According to one embodiment of the present invention, the water inlet pipe and the water outlet pipe are also provided with the following structure: connecting plates are hung on the water outlet lower flange and the water inlet lower flange respectively, and locking nuts are provided on the connecting plates, and the locking nuts can be replaced as a whole along with the connecting plates; second positioning columns and second locking studs are provided on the water inlet upper flange and the water outlet upper flange, and the second positioning columns are used for guiding and positioning between the water inlet upper flange and the water inlet lower flange and between the water outlet upper flange and the water outlet lower flange; the water inlet pipe and the water outlet pipe are both configured as bent pipes, and the flange structures are respectively located on the outside of the target chamber to make room for disassembly and tightening of the bolts.

[0015] The target device for isotope production provided by the present invention has a target chamber with an inner cavity, and a plurality of beam holes in an array are orderly arranged on the side facing the beam, and each beam hole is covered with a target window. The target assembly can be easily inserted into the target chamber, and the assembly includes a target frame corresponding to the target window one by one, and a target capsule installed inside the target frame. In the axial direction of the beam hole, at least one mounting position for accommodating the target capsule is provided in the target frame. Openings are provided on both sides of the target frame, and the side openings of the plurality of target frames correspond to each other, and are enclosed with the inner wall of the target chamber to form an independent coolant flow channel, ensuring that each target capsule has a gap reserved on both sides along the axial direction of the beam hole for the coolant to flow through, thereby achieving an efficient cooling effect and effectively ensuring the safety of the cooling water seal.

[0016] The top of the target chamber is equipped with a detachable cover assembly. After assembly, the cover assembly and the target chamber fit tightly together to seal the target assembly as a whole in the target chamber. This design simplifies the multiple sets of seals between the traditional target assembly and the target chamber into an overall seal between the cover assembly and the target chamber. The target assembly only needs to be directly inserted into the target chamber without the need for additional sealing operations, which greatly reduces the difficulty of operating the power manipulator in the hot chamber and effectively shortens the operation time. Based on the above design, the manipulator can quickly, conveniently, safely and reliably complete the disassembly and installation of the target assembly and target sheet, as well as the replacement of the target chamber in a high radiation dose environment, significantly improving operational efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a target device for isotope production provided by the present invention.

[0019] Figure 2 It is a cross-sectional view of the overall structure of the target device for isotope production provided by the present invention.

[0020] Figure 3 It is a schematic diagram of the overall structure of the target chamber of the target device for isotope production provided by the present invention.

[0021] Figure 4 It is a schematic diagram of the overall structure of the cover plate assembly of the target device for isotope production provided by the present invention.

[0022] Figure 5 The present invention is a bottom view of a target cover plate of a target device for isotope production provided by the present invention.

[0023] Figure 6 It is a schematic diagram of the overall structure of the target assembly of the target device for isotope production provided by the present invention.

[0024] Figure 7 It is a side view of the overall structure of the target assembly of the target device for isotope production provided by the present invention.

[0025] Figure 8 for Figure 1 A partial enlarged view of point A in the middle.

[0026] Reference numerals: 1. Target chamber; 2. Target assembly; 21. Positioning platform; 211. Six-sided column; 212. Blocking plate; 22. Target frame; 23. Target capsule; 3. Cover assembly; 31. Target cover; 32. Rotary locking fixture; 33. Flexible graphite gasket; 34. First locking stud; 35. First positioning column; 4. Inlet water diversion pipe; 5. Inlet box; 51. First lifting ear; 6. Inlet pipe; 7. Inlet upper flange; 8. Outlet water diversion pipe; 9. Outlet box; 91. Second lifting ear; 10. Outlet pipe; 11. Outlet upper flange; 111. Second positioning column; 112. Second locking stud; 113. Sealing ring; 12. Outlet lower flange; 121. Connecting plate; 122. Locking nut; 13. Target vehicle; 131. Inlet channel; 132. Outlet channel; 14. Inlet lower flange. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] The present invention provides a target device for isotope production, and specifically relates to a sealing and remote operation disassembly scheme for the target device for isotope production based on a high-current particle accelerator, which aims to solve the problem in the prior art that it is difficult to quickly disassemble and replace due to the complex sealing and connection methods. This complexity requires a manipulator to operate for a long time in a high radiation dose environment, increasing the risk of equipment damage. Through the design of the present invention, the time required for the manipulator to disassemble the target assembly, target plate and target chamber and replace the new target plate and target chamber can be significantly reduced. Not only is the efficiency of isotope production at beam intensities above the milliampere level improved, but the safety and reliability of the operation are also enhanced, thereby providing a more efficient, safe and reliable solution suitable for target device maintenance and replacement operations in the field of isotope production.

[0030] Combine the following Figure 1-Figure 8 Specific embodiments of the target device for isotope production of the present invention are described.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the present invention provides a target device for isotope production, comprising: a target chamber 1 and a target assembly 2; the target chamber 1 has an inner cavity and a side thereof facing the beam is provided with a plurality of beam holes arranged in an array, and the beam holes are covered with target windows; the target assembly 2 is inserted into the target chamber 1, and the target assembly 2 comprises a target frame 22 and a target capsule 23; the target frame 22 is arranged one-to-one with the target window, and at least one mounting position for mounting the target capsule 23 is provided in the target frame 22 in the axial direction of the beam hole; openings are provided on both sides of the target frame 22, and the side openings of the plurality of target frames 22 correspond to each other and enclose an independent coolant flow channel with the inner wall of the target chamber 1, and each target capsule 23 has gaps on both sides along the axial direction of the beam hole for coolant to flow through; a detachable cover assembly 3 is provided on the top of the target chamber 1, and the cover assembly 3 seals the target assembly 2 as a whole in the target chamber 1 in the assembled state.

[0032] Specifically, by designing the target assembly 2 as a modular structure, the target assembly 2 can be quickly disassembled and replaced. The openings on both sides of the target frame 22 and the design of the coolant flow channel ensure that even a large amount of heat generated under the action of a high-energy beam can be effectively dissipated, thereby maintaining the operating temperature of the target assembly 2 within a safe range and extending its service life. In addition, the sealing design between the cover assembly 3 and the target chamber 1 simplifies the multiple sets of seals between the traditional target assembly and the target chamber into an overall seal between the cover assembly 3 and the target chamber 1. The target assembly 2 only needs to be directly inserted into the target chamber 1, without the need for additional sealing operations, which reduces the difficulty of operating the power manipulator in the hot chamber.

[0033] Among them, the target window of the above-mentioned target device refers to a thin sheet covering the beam hole, which needs to have good transmission performance to allow the proton beam to pass through, and must have sufficient strength to withstand the impact of the beam; the target frame 22 is a frame structure that carries the target capsule 23, and its design takes into account the needs of easy and rapid replacement and effective cooling; the coolant flow channel refers to a channel formed by the side opening of the target frame 22 and the inner wall of the target chamber 1, which is used to circulate coolant to remove heat.

[0034] In use, the target device firstly inserts the target assembly 2 precisely into the designated position in the target chamber 1 by means of a manipulator or automated equipment. When the high-energy proton beam irradiates the target capsule 23 through the target window, the isotope production process begins. During the whole process, the cooling system works continuously, and the heat generated by the target assembly 2 is continuously removed through the coolant flow channel to ensure the safe operation of the device. Once the production cycle is over, the target assembly 2 can also be quickly and safely removed from the target chamber 1 by means of a remotely controlled manipulator for subsequent processing or replacement, which greatly improves the work efficiency and ensures the safety of the operator.

[0035] Furthermore, if Figure 6 and Figure 7 As shown, according to a target device for isotope production of the present invention, the target assembly 2 includes a positioning platform 21 arranged on the top of a target frame 22; a six-sided column 211 is provided on the upper end surface of the positioning platform 21, which is used to clamp the six-sided column 211 by a manipulator to achieve installation or removal of the target assembly 2; a blocking sheet 212 is provided on the top of the six-sided column 211, and the blocking sheet 212 is used to prevent the manipulator from slipping during the clamping process. Specifically, the six-sided column 211 configured on the positioning platform 21 provides a docking interface for the manipulator, ensuring high accuracy and stability when performing installation or removal operations. The design of the six-sided column 211 is based on its geometric characteristics, which can effectively enhance the stability of the manipulator when clamping, and avoid positional deviation caused by vibration or other interference factors in the operating environment. In addition, the blocking sheet 212 equipped on the top of the six-sided column 211 plays a key role in preventing the manipulator from slipping, thereby improving the safety factor of the operation process and reducing the risk of operation failure that may be caused by accidental slipping. The above overall architecture not only achieves fast and accurate replacement of the target assembly 2 by optimizing the structural details of the target assembly 2, but also significantly improves the safety and reliability of operation in a high radiation environment.

[0036] Furthermore, if Figure 4 and Figure 5As shown, according to a target device for isotope production of the present invention, the cover plate assembly 3 includes a target cover plate 31, and a sealing groove is provided on the bottom surface of the target cover plate 31, and a reusable flexible graphite gasket 33 is installed in the sealing groove. Specifically, the sealing groove configured at the bottom of the target cover plate 31 and the flexible graphite gasket 33 installed therein are designed to provide excellent sealing performance to ensure that the air tightness and liquid tightness of the system can be maintained in a high radiation environment. Due to its material properties, the flexible graphite gasket 33 has excellent temperature resistance, corrosion resistance and a certain degree of elasticity, and can adapt to the temperature changes and pressure fluctuations that may be experienced inside the target chamber 1, thereby ensuring a long-term and stable sealing effect. In addition, the reusability of the gasket not only reduces operating costs, but also simplifies the maintenance process and reduces the downtime required for replacing seals.

[0037] Further, according to a target device for isotope production of the present invention, a plurality of rotary locking clamps 32 are provided on the edge of the target cover plate 31, the locking handle of the rotary locking clamp 32 is located above the target cover plate 31, and the locking plate of the rotary locking clamp 32 is located below the target cover plate 31; a semicircular fixing ear is provided on the outer side of the flexible graphite gasket 33, and the semicircular fixing ear is clamped at the bottom of the target cover plate 31 through the locking plate; when the flexible graphite gasket 33 needs to be replaced, the locking handle is rotated to the unlocking angle by the manipulator, and the flexible graphite gasket 33 automatically falls off. Specifically, the rotary locking clamp 32 is used to realize a quick locking and releasing mechanism for the flexible graphite gasket 33. The locking handle and locking plate structure of the rotary locking clamp 32 ensure that uniform pressure can be effectively applied to the flexible graphite gasket 33 during the installation process of the target cover plate 31, thereby ensuring the sealing effect. At the same time, the design of the semicircular fixing ear provides a simple and stable fixing method for the flexible graphite gasket 33, so that it can maintain a stable position without displacement during the operation of the equipment.

[0038] When the flexible graphite gasket 33 needs to be replaced, the manipulator only needs to rotate the lock handle of each rotary locking fixture 32 to a specific unlocking angle. At this time, the lock piece no longer applies pressure to the semicircular fixing ear, and the flexible graphite gasket 33 can automatically fall off from the target cover plate 31 due to gravity, without the need for additional disassembly tools or complicated manual operation steps. This design not only simplifies the replacement process of the flexible graphite gasket 33 and reduces maintenance time, but also improves the safety of operation, especially in a high-radiation environment, minimizing the risk of radiation exposure to personnel and manipulators.

[0039] Further, according to a target device for isotope production of the present invention, a target cover plate 31 is provided with a plurality of first locking studs 34, and a target chamber 1 is provided with corresponding threaded holes. Specifically, a stable connection between the target cover plate 31 and the target chamber 1 is achieved through the first locking studs 34 and the threaded holes. The first locking studs 34 are evenly distributed on the edge of the target cover plate 31, ensuring that a balanced pressure can be applied to the target cover plate 31 during the installation process. Each first locking stud 34 corresponds to a threaded hole on the target chamber 1 one by one, which not only ensures accurate positioning during assembly, but also enhances the stability and durability of the entire structure.

[0040] In actual operation, by tightening or loosening these first locking studs 34, the target cover plate 31 can be tightly connected or quickly separated from the target chamber 1, which is convenient for maintenance and replacement of internal components such as the flexible graphite gasket 33. This connection method can provide reliable operating performance in a high-radiation environment and reduce the risk of material aging or performance degradation due to long-term exposure to radiation.

[0041] Further, according to a target device for isotope production of the present invention, a first positioning column 35 is provided on the target cover plate 31, which is used to position and cooperate with the positioning hole of the target chamber 1 through the first positioning column 35 when installing the target cover plate 31. Specifically, the precise matching between the first positioning column 35 and the positioning hole on the target chamber 1 ensures that the target cover plate 31 can be accurately installed in the predetermined position. The design of the first positioning column 35 not only improves the alignment accuracy during the installation process, avoids poor sealing or other potential problems caused by position deviation, but also simplifies the installation process. In actual applications, when installing the target cover plate 31, first align the first positioning column 35 with the corresponding positioning hole on the target chamber 1, and then push the target cover plate 31 along the direction of these positioning columns until it is fully in place. This positioning mechanism reduces the need for manual adjustment, thereby reducing the difficulty of operation and time cost.

[0042] Furthermore, according to a target device for isotope production of the present invention, a mushroom head lifting ear is provided on the upper surface of the target cover plate 31, which is used to realize the positioning and remote disassembly and installation of the target cover plate 31 through a sling. Specifically, the mushroom head lifting ear is used to provide a special lifting and positioning point for the target cover plate 31, so that when installing or disassembling the target cover plate 31, precise operation can be easily achieved through a special sling. In actual applications, when the target cover plate 31 needs to be replaced or maintained, a manipulator or automated lifting equipment equipped with a corresponding interface can be used to connect to the mushroom head lifting ear. In this way, the remote disassembly and installation of the target cover plate 31 can be completed safely and effectively even in a high radiation environment.

[0043] According to the target device for isotope production of the above-mentioned embodiment, the traditional multiple sets of seals between the target assembly 2 and the target chamber 1 are improved to an integrated sealing design between the target cover plate 31 and the target chamber 1, and only a reusable large flexible graphite gasket 33 is used to replace multiple small rings. The gasket is fixed on the target cover plate 31 through a special structural design, and supports automatic replacement by a power manipulator. The target assembly 2 only needs to be simply inserted into the target chamber 1 without additional sealing measures. When the target capsule 23 needs to be replaced, the operation process is simplified to unscrewing the first locking stud 34 by a power manipulator, lifting the target cover plate 31 with a mushroom head ear, and then taking out the target assembly 2 in turn and placing it in a pre-prepared container so as to be transported to the disassembly station for subsequent processing. This solution greatly reduces the difficulty of using a power manipulator in a hot chamber, significantly shortens the operation time of the manipulator, and reduces the radiation dose it bears. It not only improves the overall work efficiency, but also enhances the safety of operation and the reliability of the equipment.

[0044] Furthermore, if Figure 2 and Figure 3 As shown, according to a target device for isotope production of the present invention, a water inlet diversion pipe 4 and a water outlet diversion pipe 8 are respectively arranged on both sides of a target chamber 1; a water inlet box 5 and a water outlet box 9 are respectively arranged on the outer sides of the water inlet diversion pipe 4 and the water outlet diversion pipe 8; the top cross-sectional area of ​​the water inlet box 5 and the water outlet box 9 is half of the bottom cross-sectional area, and the outer side surfaces of the water inlet box 5 and the water outlet box 9 are both inclined surfaces; a first lifting ear 51 is provided on the water inlet box 5, and a second lifting ear 91 is provided on the water outlet box 9, and the overall lifting of the target device can be achieved by lifting the first lifting ear 51 and the second lifting ear 91.

[0045] Specifically, the top cross-sectional area of ​​the water inlet box 5 and the water outlet box 9 is half of the bottom cross-sectional area and the outer side surface adopts a bevel design, which not only helps to optimize the flow path of the coolant, but also effectively reduces fluid resistance, ensuring that the coolant can be evenly distributed to each row of coolant flow channels when entering and leaving the target chamber 1, thereby ensuring the consistency of the coolant flow rate and improving the cooling efficiency. The bevel design also helps to prevent the accumulation of sediments and facilitates long-term maintenance and cleaning of the equipment.

[0046] In addition, the first lifting lug 51 and the second lifting lug 91 on the water inlet box 5 and the water outlet box 9 provide a stable and reliable lifting point for the entire target device, so that the target device can be easily lifted, transported and installed as a whole through a special lifting device. This not only improves the flexibility and safety of the operation, but is also suitable for remote control in a high-radiation environment, reduces the need for manual intervention, further ensures the safety of the operator and improves work efficiency.

[0047] Furthermore, if Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, according to a target device for isotope production of the present invention, the lower ends of the water inlet box 5 and the water outlet box 9 are respectively provided with a water inlet pipe 6 and a water outlet pipe 10 of a coolant flow channel, and the target device is connected to the target vehicle 13 through the water inlet pipe 6 and the water outlet pipe 10; the water inlet pipe 6 and the water outlet pipe 10 on the target device are respectively welded with a water inlet upper flange 7 and a water outlet upper flange 11 at the lower ends, and the water inlet channel 131 and the water outlet channel 132 of the target vehicle 13 are respectively welded with a water inlet lower flange 14 and a water outlet lower flange 12 at the upper ends; the water inlet upper flange 7 and the water outlet upper flange 11 are respectively provided with a sealing ring 113 between the water inlet lower flange 14 and the water outlet lower flange 12. Specifically, the cooling water sealing and connection between the target chamber 1 and the target vehicle 13 are achieved by the water inlet upper flange 7 and the water outlet upper flange 11 located at the lower ends of the water inlet pipe 6 and the water outlet pipe 10 of the target chamber 1, and the water inlet lower flange 14 and the water outlet lower flange 12 located above the target vehicle 13 to achieve a sealing connection. A sealing ring 113 is provided between the flanges. The sealing ring 113 can be made of a nuclear-grade flexible graphite flat gasket or a metal C-type or O-type sealing ring 113. These materials are all resistant to high-dose radiation and ensure long-term reliability. The sealing ring 113 is fixed in the sealing groove of the upper flange by small bolts to ensure that it is firmly positioned and not easily displaced.

[0048] When the target chamber 1 needs to be disassembled and replaced, the sealing ring 113 can be remotely and quickly disassembled and replaced together with the target chamber 1 through a power manipulator. This design not only simplifies the maintenance process and reduces the need for manual intervention, but also effectively protects the safety of operators in a high-radiation environment. In addition, by optimizing the design of the flange and the sealing ring 113, the sealing and stability of the cooling system are improved, thereby ensuring the consistency of cooling efficiency and the reliability of equipment operation during the isotope production process.

[0049] Further, according to a target device for isotope production of the present invention, the water inlet pipe 6 and the water outlet pipe 10 are also provided with the following structure: a connecting plate 121 is hung on the water outlet lower flange 12 and the water inlet lower flange 14 respectively, and a locking nut 122 is provided on the connecting plate 121, and the locking nut 122 can be replaced as a whole along with the connecting plate 121; a second positioning column 111 and a second locking stud 112 are provided on the water inlet upper flange 7 and the water outlet upper flange 11, and the second positioning column 111 is used for guiding and positioning between the water inlet upper flange 7 and the water inlet lower flange 14 and between the water outlet upper flange 11 and the water outlet lower flange 12; the water inlet pipe 6 and the water outlet pipe 10 are both configured as bent pipes, and the flange structures are respectively located on the outside of the target chamber 1 to make room for disassembly and tightening of the bolts.

[0050] Specifically, the connection plate 121 is hung on the outlet submerged flange 12 and the inlet submerged flange 14, and the locking nut 122 is configured on the connection plate 121, so that the entire assembly can be easily replaced when necessary, which not only simplifies the maintenance process, but also ensures that the sealing effect after each replacement is consistent and reliable. The locking nut 122 can be replaced together with the connection plate 121, ensuring the tightness of the connection part and reducing the risk of leakage.

[0051] Secondly, the second positioning column 111 and the second locking stud 112 added to the water inlet upper flange 7 and the water outlet upper flange 11 provide a more accurate guiding and positioning function. The second positioning column 111 is used to guide the flanges to accurately dock during installation, thereby avoiding poor sealing problems caused by position deviation. The second locking stud 112 ensures the stability of the connection between the flanges, prevents loosening or displacement during operation, and enhances the durability and safety of the entire system.

[0052] Finally, the water inlet pipe 6 and the water outlet pipe 10 are designed as curved pipes, and the flange structure is placed outside the target chamber 1. This design cleverly leaves enough operating space for the use of tools to disassemble and tighten the bolts. Such a layout takes into account the actual maintenance needs, so that related operations can be completed efficiently even in a limited space, greatly facilitating the operation of the power manipulator, while also reducing the risks caused by inconvenient operation.

[0053] Based on the target device for isotope production according to the preferred embodiment of the present invention, the device produces isotopes based on a high-current particle accelerator, and the sealing and remote operation and replacement scheme of the target device are as follows.

[0054] The target device includes a target chamber 1 and a target assembly 2; the target chamber 1 has an inner cavity and a side thereof facing the beam is provided with a plurality of beam holes arranged in an array, each beam hole being covered with a target window; the target assembly 2 includes a target frame 22 corresponding to the target window one by one, and in the axial direction of the beam hole, at least one mounting position for mounting a target capsule 23 is provided in the target frame 22. The target frame 22 is designed to be U-shaped, with the opening facing the target window, and the back plate prevents the beam from penetrating. The inner wall of the target frame 22 is provided with a plurality of embedded groove groups, forming a plurality of mounting positions arranged at intervals along the axial direction of the beam hole.

[0055] The target frame 22 is provided with openings on both sides, and these openings and the inner wall of the target chamber 1 form independent cooling liquid flow channels to ensure that the cooling liquid can flow through both sides of each target capsule 23. The target chamber 1 is provided with a water inlet pipe 4 and a water outlet pipe 8 on both sides, corresponding to the multiple cooling liquid flow channels. The multiple cooling liquid flow channels are arranged along the first direction (such as Figure 2 The lateral direction shown) and extends along a second direction (such as Figure 2The target chamber 1 is arranged in the vertical direction as shown, and the first direction is perpendicular to the second direction. The target chamber 1 is provided with a plurality of mounting holes in the second direction, which are arranged along the first direction. Each target assembly 2 includes a plurality of target frames 22 connected in sequence along the second direction, which are inserted and connected with the mounting holes. A central raised target cover plate 31 is provided on the top of the target chamber 1, and a rotating locking clamp 32 and a sealing groove are provided on the edge. A reusable nuclear-grade flexible graphite gasket 33 is installed in the sealing groove for easy and quick replacement.

[0056] The edge of the target cover plate 31 is provided with a plurality of locking studs, which cooperate with the threaded holes on the target chamber 1. The bolts are tightened by the manipulator to achieve the fixation of the target assembly 2 and the overall water sealing. The target cover plate 31 is provided with a positioning column for the power manipulator to quickly and accurately position. At the same time, the upper end of the cover plate is provided with a mushroom head lifting ear, which is convenient for remote disassembly and installation. The cross-sectional shape of the internal channel of the water inlet water diversion pipe 4 and the water outlet water diversion pipe 8 is adapted to the coolant flow channel to ensure uniform flow of the coolant. The water inlet box 5 and the water outlet box 9 are connected to the corresponding water pipes, the cross-sectional area of ​​the top surface is half of the bottom surface and the outer side surface is an inclined surface to ensure uniform flow rate of the coolant.

[0057] In addition, the upper end surfaces of the water inlet box 5 and the water outlet box 9 are provided with lifting ears, which facilitate the lifting, transportation and replacement of the entire target chamber 1 in the hot chamber with the assistance of a power manipulator or a master-slave manipulator through a special lifting tool. The water inlet pipe 6 and the water outlet pipe 10 are also provided with the following structure: a connecting plate 121 is hung on the water outlet lower flange 12 and the water inlet lower flange 14 respectively, and a locking nut 122 is provided on the connecting plate 121, and the locking nut 122 can be replaced as a whole with the connecting plate 121.

[0058] The water inlet upper flange 7 and the water outlet upper flange 11 are provided with a second positioning column 111 and a second locking stud 112. The second positioning column 111 is used for guiding and positioning between the water inlet upper flange 7 and the water inlet lower flange 14 and between the water outlet upper flange 11 and the water outlet lower flange 12. The water inlet pipe 6 and the water outlet pipe 10 are both configured as curved pipes. At the same time, the above-mentioned flange structures are respectively located outside the target chamber 1 to make room for the removal and tightening of the bolts, thereby improving the convenience and safety of maintenance.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A target device for isotope production, characterized in that: include: A target chamber (1) and a target assembly (2); The target chamber (1) has an inner cavity and a surface thereof facing the beam is provided with a plurality of beam holes arranged in an array, wherein the beam holes are covered with a target window; The target assembly (2) is inserted into the target chamber (1), the target assembly (2) comprising a target frame (22) and a target capsule (23); the target frame (22) is arranged in one-to-one correspondence with the target window, and in the axial direction of the beam hole, at least one mounting position for mounting the target capsule (23) is provided in the target frame (22); Openings are provided on both sides of the target frame (22), and the side openings of the plurality of target frames (22) correspond to each other and enclose an independent coolant flow channel with the inner wall of the target chamber (1), and each target capsule (23) has gaps on both sides along the axial direction of the beam hole for coolant to flow through; A detachable cover plate assembly (3) is provided on the top of the target chamber (1); in an assembled state, the cover plate assembly (3) seals the target assembly (2) as a whole in the target chamber (1).

2. The target device for isotope production according to claim 1, characterized in that: The target assembly (2) comprises a positioning platform (21) arranged on the top of the target frame (22); The upper end surface of the positioning platform (21) is provided with a six-sided column (211) for clamping the six-sided column (211) by a manipulator to achieve installation or removal of the target assembly (2); A blocking sheet (212) is provided on the top of the six-sided column (211), and the blocking sheet (212) is used to prevent the robot arm from slipping during the clamping process.

3. The target device for isotope production according to claim 1, characterized in that: The cover plate assembly (3) comprises a target cover plate (31), wherein a sealing groove is provided on the bottom surface of the target cover plate (31), and a reusable flexible graphite gasket (33) is installed in the sealing groove.

4. The target device for isotope production according to claim 3, characterized in that: A plurality of rotary locking clamps (32) are provided on the edge of the target cover plate (31), wherein the locking handles of the rotary locking clamps (32) are located above the target cover plate (31), and the locking sheets of the rotary locking clamps (32) are located below the target cover plate (31); A semicircular fixing ear is provided on the outer side of the flexible graphite gasket (33), and the semicircular fixing ear is clamped on the bottom of the target cover plate (31) through the locking piece; When the flexible graphite gasket (33) needs to be replaced, the lock handle is rotated to an unlocking angle by a mechanical arm, and the flexible graphite gasket (33) automatically falls off.

5. The target device for isotope production according to claim 3, characterized in that: The target cover plate (31) is provided with a plurality of first locking studs (34), and the target chamber (1) is provided with threaded holes corresponding thereto.

6. The target device for isotope production according to claim 3, characterized in that: The target cover plate (31) is provided with a first positioning column (35) for positioning and matching with a positioning hole of the target chamber (1) through the first positioning column (35) when the target cover plate (31) is installed.

7. The target device for isotope production according to claim 3, characterized in that: The upper surface of the target cover plate (31) is provided with a mushroom-head lifting lug, which is used to achieve positioning, remote disassembly and installation of the target cover plate (31) through a lifting device.

8. The target device for isotope production according to any one of claims 1 to 7, characterized in that: A water inlet pipe (4) and a water outlet pipe (8) are respectively arranged on both sides of the target chamber (1); A water inlet box (5) and a water outlet box (9) are respectively provided on the outer sides of the water inlet water diversion pipe (4) and the water outlet water diversion pipe (8); The cross-sectional area of ​​the top surface of the water inlet box (5) and the water outlet box (9) is half of the cross-sectional area of ​​the bottom surface, and the outer side surfaces of the water inlet box (5) and the water outlet box (9) are both inclined surfaces; The water inlet box (5) is provided with a first lifting lug (51), and the water outlet box (9) is provided with a second lifting lug (91). By lifting the first lifting lug (51) and the second lifting lug (91), the target device can be hoisted as a whole.

9. The target device for isotope production according to claim 8, characterized in that: A water inlet pipe (6) and a water outlet pipe (10) of the coolant flow channel are respectively provided at the lower ends of the water inlet box (5) and the water outlet box (9); the target device is connected to the target vehicle (13) via the water inlet pipe (6) and the water outlet pipe (10); The water inlet pipe (6) and the water outlet pipe (10) on the target device are respectively welded with a water inlet upper flange (7) and a water outlet upper flange (11) at the lower end, and the water inlet channel (131) and the water outlet channel (132) of the target vehicle (13) are respectively welded with a water inlet lower flange (14) and a water outlet lower flange (12) at the upper end; Sealing rings (113) are provided between the water inlet upper flange (7) and the water outlet upper flange (11) and the water inlet lower flange (14) and the water outlet lower flange (12), respectively.

10. The target device for isotope production according to claim 9, characterized in that: The water inlet pipe (6) and the water outlet pipe (10) are also provided with the following structure: The outlet submerged flange (12) and the inlet submerged flange (14) are respectively hung with connecting plates (121), and the connecting plates (121) are provided with locking nuts (122), and the locking nuts (122) can be replaced as a whole along with the connecting plates (121); The water inlet upper flange (7) and the water outlet upper flange (11) are provided with a second positioning column (111) and a second locking stud (112), wherein the second positioning column (111) is used for guiding and positioning between the water inlet upper flange (7) and the water inlet lower flange (14) and between the water outlet upper flange (11) and the water outlet lower flange (12); The water inlet pipe (6) and the water outlet pipe (10) are both configured as bent pipes, and the flange structures are respectively located outside the target chamber (1) to allow space for disassembly and tightening of the bolts.

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