Detachable sealed water-cooling solid-state lithium target based on accelerator

Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to an accelerator-based detachable sealed water-cooling solid-state lithium target which comprises a lithium target body, the lithium target body comprises a target seat assembly and a target disc assembly, the target seat assembly comprises a target seat body, the target seat body is of a cylindrical structure, a cooling plate is arranged at the bottom end of the target seat body, and a cooling water channel groove is formed in the upper surface of the cooling plate; the side wall of the cooling plate is provided with a water inlet joint and a water outlet joint which are respectively connected with two ends of the cooling water channel groove; the target disc assembly comprises a target disc body, the target disc body is clamped in the target seat body, the target disc body is of a cylindrical structure, a copper substrate is horizontally and fixedly arranged in the target disc body, a lithium layer is arranged on the upper surface of the copper substrate, an annular connecting plate is arranged on the outer side wall of the top end of the target disc body, and the connecting plate is detachably and fixedly connected with the top end of the target seat body. The target seat assembly and the target disc assembly are of a split structure and are connected through the connecting plate, the target disc assembly can be detached from the target seat assembly during replacement, the workload of replacement operation is reduced, the working efficiency is improved, and meanwhile the replacement cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a detachable sealed water-cooled solid lithium target based on an accelerator. Background Art

[0002] In boron neutron capture therapy (BNCT), a neutron source that produces high-intensity, low-energy (thermal / slow) neutrons is a key component of the treatment system. While effective, traditional nuclear reactor neutron sources are limited in clinical application by their bulk and complex radiation protection. Consequently, accelerator-based neutron sources have become a research hotspot in recent years, with lithium targets being one of the most promising neutron production targets. The structure and heat dissipation design of lithium targets are crucial components of BNCT equipment. Currently used lithium targets have an integrated target base and target disc, with coolant channels machined into the target base. Regular target replacement requires disassembly of both the target base and target disc, resulting in inefficient and costly replacement. Furthermore, the cooling channels within the target base of currently used lithium targets are difficult to machine due to their internal location. Furthermore, the simple structure of the cooling channels results in low coolant utilization, resulting in high coolant usage and increased costs.

[0003] In response to the above problems, the present invention document proposes a detachable sealed water-cooled solid lithium target based on an accelerator. Summary of the Invention

[0004] The present invention provides a detachable sealed water-cooled solid lithium target based on an accelerator, which improves the efficiency of disassembly and assembly of the lithium target, reduces replacement cost, increases the utilization rate of the coolant, and reduces use cost.

[0005] The present invention provides the following technical solutions:

[0006] A detachable sealed water-cooled solid lithium target based on an accelerator comprises a lithium target body, the lithium target body comprises a target base assembly and a target disk assembly, the target base assembly comprises a target base body, the target base body is a cylindrical structure, a cooling plate is fixedly provided at its bottom end, the diameter of the cooling plate is larger than the diameter of the target base body, a cooling water channel groove is provided on the upper surface of the cooling plate corresponding to the position inside the target base body, and the side wall of the cooling plate is provided with a water inlet joint and a water outlet joint respectively connected to the two ends of the cooling water channel groove; the target disk assembly comprises a target disk body, the target disk body is clamped in the target base body, the outer side wall of the target disk body abuts against the inner side wall of the target base body, the target disk body is a cylindrical structure, a copper base plate is horizontally fixedly provided therein, the upper surface of the copper base plate is provided with a lithium layer, and the outer side wall of the top end of the target disk body is provided with an annular connecting plate, and the connecting plate is detachably fixed to the top end of the target base body.

[0007] Furthermore, the cooling plate is evenly provided with first countersunk mounting holes near the edge, the connecting plate is evenly provided with second countersunk mounting holes, and the top end surface of the target base body is provided with threaded mounting holes that match the second countersunk mounting holes.

[0008] Furthermore, an annular groove is provided on the outer side wall of the target plate body, and a sealing ring is provided in the annular groove.

[0009] Furthermore, the cooling water channel grooves are distributed in a coil-shaped structure in the installation groove.

[0010] Furthermore, the copper substrate has a thickness of 1-3 mm.

[0011] Furthermore, the side wall of the cooling plate is provided with an inlet and an outlet respectively connected to the two ends of the cooling water channel groove. The inlet is located at one end of the outer wall of the target base assembly and is provided with an inlet joint, and the other end is connected to the cooling water channel groove. The outlet is located at one end of the outer wall of the target base assembly and is provided with a water outlet joint, and the other end is connected to the cooling water channel groove.

[0012] Furthermore, the copper substrate is flush with the bottom end surface of the target plate body, and the copper substrate is in contact with the upper surface of the cooling plate.

[0013] In the present invention, the target base assembly and the target plate assembly are arranged as a split structure and are connected by a connecting plate. When replacing, it is only necessary to remove the target plate assembly from the target base assembly, which reduces the workload of the replacement operation, improves the work efficiency, and reduces the replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the three-dimensional structure of a detachable sealed water-cooled solid lithium target based on an accelerator provided by an embodiment of the present invention;

[0015] Figure 2 A schematic side view of the structure of a detachable sealed water-cooled solid lithium target based on an accelerator provided by an embodiment of the present invention;

[0016] Figure 3 for Figure 2 AA cross-sectional view;

[0017] Figure 4 A schematic top view of a detachable sealed water-cooled solid lithium target based on an accelerator provided by an embodiment of the present invention;

[0018] Figure 5 for Figure 4 BB cross-sectional view;

[0019] Figure 6 for Figure 4CC cross-sectional view;

[0020] Figure 7 A schematic diagram of the three-dimensional structure of a target disk assembly in a detachable sealed water-cooled solid lithium target based on an accelerator provided by an embodiment of the present invention;

[0021] Figure 8 This is a schematic diagram of the three-dimensional structure of a target base assembly in a detachable sealed water-cooled solid lithium target based on an accelerator provided by an embodiment of the present invention.

[0022] Reference numerals:

[0023] 1. Target base assembly; 101. Target base body; 102. Cooling plate; 103. Cooling water channel; 104. First countersunk mounting hole; 105. Water inlet connector; 106. Water inlet; 107. Water outlet connector; 108. Water outlet; 109. Threaded mounting hole; 2. Target disc assembly; 201. Target disc body; 202. Connecting plate; 203. Second countersunk mounting hole; 204. Annular slot; 205. Sealing ring; 206. Copper substrate; 207. Lithium layer. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0026] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0027] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0028] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0029] Example:

[0030] Reference Figures 1 to 8 As shown, a detachable sealed water-cooled solid lithium target based on an accelerator includes a lithium target body, which includes a target base assembly 1 and a target disk assembly 2. The target base assembly 1 includes a target base body 101. The target base body 101 is a cylindrical structure, and a cooling plate 102 is fixed at its bottom end. The diameter of the cooling plate 102 is larger than the diameter of the target base body 101. A cooling water channel 103 is opened on the upper surface of the cooling plate 102 at a position corresponding to the interior of the target base body 101. The side wall of the cooling plate 102 is provided with two ends of the cooling water channel 103. Connect the water inlet joint 105 and the water outlet joint 107; the target plate assembly 2 includes a target plate body 201, which is clamped in the target base body 101, and the outer wall of the target plate body 201 is against the inner wall of the target base body 101. The target plate body 201 is a cylindrical structure, and a copper base plate 206 is fixedly arranged horizontally inside it. The upper surface of the copper base plate 206 is provided with a lithium layer 207. The outer wall of the top of the target plate body 201 is provided with an annular connecting plate 202, and the connecting plate 202 is detachably fixed to the top of the target base body 101.

[0031] The target base assembly 1 and the target disc assembly 2 have a split structure, and the target disc body 201 is clamped inside the target base body 101, and is connected to the target base body 101 through a connecting plate 202 on the outer wall of the target disc body 201, so that the target disc body 201 and the target base body 101 are connected together. The cooling plate 102 installs the target base assembly 1 on the accelerator, and then the lithium target body is installed in the use position. When replacing, it is only necessary to separate the connecting plate 202 from the target base body 101, remove the target disc body 201 from the target base body 101 through the interface, and replace the target disc body 201. The removal body does not need to be disassembled, which reduces the workload of replacing the lithium target and improves the replacement efficiency. At the same time, the target base body 101 does not need to be replaced, saving replacement costs.

[0032] The cooling water channel groove 103 is directly machined on the upper surface of the cooling plate 102 , which reduces the machining difficulty and further reduces the machining cost of the lithium target.

[0033] The cooling plate 102 is evenly provided with first countersunk mounting holes 104 near the edge, the connecting plate 202 is provided with second countersunk mounting holes 203, and the top end surface of the target base body 101 is provided with threaded mounting holes 109 that match the second countersunk mounting holes 203.

[0034] The first countersunk mounting hole 104 facilitates fixing the cooling plate 102 in the use position, thereby fixing the lithium target body, and the second countersunk mounting hole 203 and the threaded mounting hole 109 cooperate with bolts to fix the connecting plate 202 and the target base assembly 1 together, thereby facilitating the installation and positioning of the target plate assembly 2. The use of the countersunk mounting hole prevents the bolts from interfering with the operation of the lithium target using equipment.

[0035] An annular groove 204 is provided on the outer side wall of the target plate body 201 , and a sealing ring 205 is provided in the annular groove 204 .

[0036] The annular groove 204 facilitates positioning of the sealing ring 205 , and the sealing ring 205 improves the sealing between the outer wall of the target disc body 201 and the inner wall of the target base body 101 , thereby preventing the coolant in the cooling water channel groove 103 from leaking from the connection between the target disc body 201 and the target base body 101 and affecting the operation of the accelerator, thereby improving the safety of the lithium target.

[0037] The cooling water channel groove 103 is distributed in a coil-shaped structure in the installation groove.

[0038] The cooling water channel groove 103 is located on the upper surface of the cooling plate 102 and can be directly machined by a milling cutter, which reduces the difficulty of machining the cooling water channel groove 103. At the same time, the coolant in the cooling water channel groove 103 is in direct contact with the copper substrate 206, which can quickly take away the heat generated by the protons hitting the lithium target, thereby avoiding the lithium target body from being overheated and causing damage to the lithium target.

[0039] The structure of the cooling water channel 103 is conducive to sufficient heat exchange between the coolant and the copper substrate 206 when the coolant flows in the cooling water channel 103 , thereby improving the utilization rate of the coolant and reducing the use cost of the lithium target.

[0040] The thickness of the copper substrate 206 is 1-3 mm.

[0041] The thinner the copper substrate 206 is, the more conducive it is to cooling the lithium layer 207 . However, the structural strength of the lithium layer 207 during use also needs to be ensured.

[0042] The side wall of the cooling plate 102 is provided with an inlet channel 106 and an outlet channel 108 respectively connected to the two ends of the cooling water channel groove 103. The inlet channel 106 is located at one end of the outer wall of the target base assembly 1 and is provided with a water inlet connector 105, and the other end is connected to the cooling water channel groove 103. The outlet channel 108 is located at one end of the outer wall of the target base assembly 1 and is provided with a water outlet connector 107, and the other end is connected to the cooling water channel groove 103.

[0043] The water inlet 106 and the water outlet 108 facilitate the installation of the water inlet joint 105 and the water outlet joint 107, and then facilitate the connection of the cooling water channel groove 103 with the external liquid supply pipeline, so that the coolant can flow from the water inlet joint 105, flow through the cooling water channel groove 103, and then flow out through the water outlet joint 107.

[0044] The copper substrate 206 is flush with the bottom end surface of the target plate body 201 , and the copper substrate 206 is in contact with the upper surface of the cooling plate 102 .

[0045] The top of the cooling water channel groove 103 is sealed by the copper substrate 206, so that the coolant can flow along the cooling water channel groove 103 and take the heat out of the lithium target body without mixing the coolant that has just entered from the water inlet 106 with the coolant that has already undergone heat exchange, resulting in a very low coolant utilization rate and increased usage costs.

[0046] In actual use, a cooling water channel groove 103 with a coil-shaped structure is processed on the upper surface of the cooling plate 102, and an inlet channel 106 and an outlet channel 108 are processed on the side of the cooling plate 102, which are respectively connected to the two open ends of the cooling water channel groove 103. A water inlet joint 105 and a water outlet joint 107 are respectively provided at the positions corresponding to the inlet channel 106 and the outlet channel 108 on the outer wall of the cooling plate 102. The target plate body 201 is placed in the target base body 101, and the connection is sealed by the sealing ring 205. The copper base plate 206 is in contact with the upper surface of the cooling plate 102, and the connecting plate 202 is in contact with the upper end surface of the target base body 101. The second countersunk mounting hole 203 and the threaded mounting hole 109 are matched with bolts. , so that the connecting plate 202 is fixedly connected to the target base body 101, and then the target plate body 201 is fixedly connected to the target base body 101, and the lithium target body is installed on the accelerator for use through the first countersunk mounting hole 104 on the cooling plate 102 with bolts. It is connected to the external coolant supply pipe through the water inlet joint 105 and is connected to the external coolant recovery pipe through the water outlet joint 107. The coolant enters from the water inlet joint 105, passes through the water inlet channel 106, and enters the cooling water channel groove 103. After heat exchange with the copper base plate 206, it enters the water outlet channel 108 and flows out from the water outlet joint 107. The coolant can fully exchange heat with the copper base plate 206, thereby improving the utilization rate of the coolant and reducing the use cost. When the lithium target needs to be replaced after a certain period of use, it is only necessary to separate the connecting plate 202 from the target base body 101, and then the target plate body 201 can be removed from the target base body 101, and the target plate body 201 can be replaced, which reduces the replacement cost and the workload of replacing the target plate body 201 and improves the replacement efficiency.

[0047] In actual use, the cooling plate 102 is formed together with the target base body 101 to improve the sealing and structural strength of the target base assembly 1, while the connecting plate 202, the target plate body 201 and the copper base plate 206 are integrally formed to improve the sealing and structural strength of the target plate assembly 2.

[0048] The sealing ring 205 adopts a high-temperature resistant fluororubber O-type sealing ring to prevent the sealing ring 205 from aging due to a high-temperature environment and causing coolant leakage.

[0049] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. The embodiments of the present invention and the features therein can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A detachable sealed water-cooled solid lithium target based on an accelerator, characterized in that: The lithium target body comprises a target base assembly and a target disk assembly, wherein the target base assembly comprises a target base body, the target base body is a cylindrical structure, a cooling plate is fixedly provided at the bottom end thereof, the diameter of the cooling plate is larger than the diameter of the target base body, a cooling water channel groove is provided on the upper surface of the cooling plate corresponding to the position inside the target base body, and the side wall of the cooling plate is provided with a water inlet joint and a water outlet joint respectively connected to the two ends of the cooling water channel groove; the target disk assembly comprises a target disk body, the target disk body is clamped in the target base body, the outer side wall of the target disk body is abutted against the inner side wall of the target base body, the target disk body is a cylindrical structure, a copper base plate is fixedly provided therein horizontally, a lithium layer is provided on the upper surface of the copper base plate, an annular connecting plate is provided on the outer side wall of the top end of the target disk body, and the connecting plate is detachably connected to the top end of the target base body.

2. The accelerator-based detachable sealed water-cooled solid lithium target according to claim 1, characterized in that: The cooling plate is evenly provided with first countersunk mounting holes near the edge, the connecting plate is evenly provided with second countersunk mounting holes, and the top end surface of the target base body is provided with threaded mounting holes that match the second countersunk mounting holes.

3. The detachable sealed water-cooled solid lithium target based on an accelerator according to claim 1, characterized in that: An annular groove is provided on the outer side wall of the target plate body, and a sealing ring is provided in the annular groove.

4. The detachable sealed water-cooled solid lithium target based on an accelerator according to claim 1, characterized in that: The cooling water channel grooves are distributed in a coil-shaped structure in the installation groove.

5. The detachable sealed water-cooled solid lithium target based on an accelerator according to claim 1, characterized in that: The thickness of the copper substrate is 1-3 mm.

6. The accelerator-based detachable sealed water-cooled solid lithium target according to claim 1, characterized in that: The side wall of the cooling plate is provided with an inlet and an outlet respectively connected to the two ends of the cooling water channel groove. The inlet is located at one end of the outer wall of the target base assembly and is provided with a water inlet joint, and the other end is connected to the cooling water channel groove. The outlet is located at one end of the outer wall of the target base assembly and is provided with a water outlet joint, and the other end is connected to the cooling water channel groove.

7. The accelerator-based detachable sealed water-cooled solid lithium target according to claim 1, characterized in that: The copper substrate is flush with the bottom end surface of the target plate body, and the copper substrate abuts against the upper surface of the cooling plate.

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