Reciprocating dynamic solid target device

Abstract

The invention relates to the technical field of accelerator target structures, in particular to a reciprocating dynamic solid target device. According to the technical scheme, the accelerator comprises an accelerator cavity, and first quick connectors are fixed to the two sides of the accelerator cavity; a target body which moves horizontally is installed in the accelerator cavity in a sliding mode, the two ends of the target body are connected with metal corrugated pipes, and two first quick connectors are detachably connected with the two metal corrugated pipes respectively. The accelerator cavity is provided with a reciprocating motion device used for driving the target body to move in a reciprocating mode. According to the invention, the target body can be stably driven to reciprocate on the track, so that the ion beam bombards different positions of the target surface, the target surface is heated more uniformly, and the service life of the target is prolonged; the cooling water channel is formed in the target body, and deionized water is introduced for cooling, so that the thermal load on the target body can be effectively removed, and the maximum thermal load which can be borne by the target body is increased.

Description

Technical Field

[0001] The invention relates to the technical field of accelerator target structures, in particular to a reciprocating dynamic solid target device. Background Art

[0002] Ion beam bombardment of targets is widely used in accelerator neutron source systems. Taking the compact deuterium-deuterium neutron generator as an example, the electrons in the ion source collide with deuterium gas to produce deuterium ions. These ions are accelerated and bombarded onto the target, where they collide with deuterium particles in the target to produce nuclear fusion reactions and neutrons. In this process, the target body is bombarded by the ion beam and also brings a large amount of high heat load. If the ion beam bombards the same point on the target surface for a long time, not only will the target body be damaged to a certain extent due to uneven heating, but it will also consume the titanium film that adsorbs deuterium particles at the bombardment point on the target surface, resulting in a decrease in neutron yield. The traditional rotating target uses a motor to drive the target body to rotate. Although it increases the uniformity of the target surface heating, the target body cannot rotate smoothly due to the vibration characteristics of the motor. At the same time, the vibration also has a certain degree of influence on other components of the accelerator.

[0003] Therefore, how to ensure that the target body can be heated evenly while making the target move smoothly is a problem to be solved. The present application proposes a reciprocating dynamic solid target device. Summary of the invention

[0004] The purpose of the present invention is to provide a reciprocating dynamic solid target device to solve the problem in the background technology of how to ensure that the target body can be heated uniformly while making the target move smoothly.

[0005] The technical solution of the present invention is a reciprocating dynamic solid target device, comprising:

[0006] An accelerator cavity, wherein two sides of the accelerator cavity are fixed with quick connectors;

[0007] A target body is slidably mounted in the accelerator cavity for horizontal movement, with metal bellows connected to both ends of the target body, and two quick connectors are detachably connected to the two metal bellows respectively;

[0008] The accelerator cavity is provided with a reciprocating motion device for driving the target body to move back and forth.

[0009] Optionally, metal threaded tubes are fixed on both sides of the accelerator cavity, the first quick connector is fixed in the metal threaded tube, the end of the metal bellows away from the target body is fixed with a second quick connector, the second quick connector is threadedly connected to the metal threaded tube, and the first quick connector is abutted against the second quick connector.

[0010] Optionally, a moving block is fixed to the bottom of the target body by bolts, a sliding track is slidably provided on the moving block, grooves are provided on the inner walls of both sides of the accelerator cavity, and both ends of the sliding track are slidably connected to the inner walls of the two grooves respectively.

[0011] Optionally, springs are fixed at both ends of the sliding track, and the springs are located in the grooves.

[0012] Optionally, the reciprocating motion device includes a vacuum servo motor fixed to one side of the accelerator cavity, a KF connecting port is fixed to one side of the accelerator cavity, a KF adapter is fixedly installed on the KF connecting port, the vacuum servo motor is welded to the KF adapter, a rotating shaft threadedly connected to the moving block is rotatably installed in the accelerator cavity, and the output shaft of the vacuum servo motor is transmission-connected to the rotating shaft.

[0013] Optionally, a bearing is fixed to a side of the accelerator cavity away from the KF connection port, and one end of the rotating shaft is welded to an inner ring of the bearing.

[0014] Optionally, screw nuts are fixed on both sides of the moving block by bolts, and the screw nuts are threadedly connected to the rotating shaft. A mounting hole is opened on the moving block, and the rotating shaft passes through the mounting hole and the inner diameter of the mounting hole is larger than the vertical section diameter of the rotating shaft.

[0015] Optionally, a protrusion is provided at one end of the rotating shaft away from the bearing, and a circular hole is provided at one end of the rotating shaft, a groove matching the protrusion is provided on the output shaft of the vacuum servo motor, and a circular hole is provided on the output shaft of the vacuum servo motor, and a pin is inserted between the circular hole and the circular hole.

[0016] Optionally, the target body is made of titanium, the cross-sectional diameter of the target body is 80-120 mm, the thickness of the target body is 6-16 mm, and the target body is connected to the moving block by eight M8 bolts.

[0017] Compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0018] The present invention adopts a roller screw as a moving platform of the target body and a vacuum servo motor as a power device, which can steadily drive the target body to reciprocate on the track, allowing the ion beam to bombard different positions of the target surface, so that the target surface is heated more evenly and the service life of the target is extended;

[0019] A cooling water channel is opened inside the target body and deionized water is introduced for cooling, which can effectively remove the heat load on the target body and increase the maximum heat load that the target body can withstand;

[0020] A retractable bellows is used as a cooling water pipeline. When the target moves, the bellows provides sufficient tension to prevent the cooling water pipeline from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A general schematic diagram of a reciprocating dynamic solid target device structure of the present invention is given;

[0022] Figure 2 is a schematic diagram of the structure of the target;

[0023] Figure 3 is a schematic diagram of the structure of the accelerator cavity;

[0024] Figure 4 It is a structural schematic diagram of a reciprocating motion device.

[0025] Figure numerals: 1, accelerator cavity; 2, reciprocating dynamic solid target device; 101, quick connection one; 102, metal threaded pipe; 103, groove; 104, bearing; 105, KF connection port; 201, bellows; 202, quick connection two; 203, sliding track; 204, rotating shaft; 205, screw nut; 206, moving block; 207, target body; 208, KF adapter; 209, latch; 210, vacuum servo motor. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 limiting 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.

[0030] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example

[0033] like Figure 1 As shown, a reciprocating dynamic solid target device proposed by the present invention includes an accelerator cavity 1, and quick connectors 101 are fixed on both sides of the accelerator cavity 1; one of the quick connectors 101 is connected to the output end of the chiller, and the other quick connector 101 is connected to the chiller. The chiller belongs to the prior art and will not be described in detail here.

[0034] like Figure 1 - Figure 4 As shown, in this embodiment, a target 207 for horizontal movement is slidably installed in the accelerator cavity 1. The target 207 is made of titanium, with a cross-sectional diameter of 100 mm and a thickness of 10 mm. The target 207 is connected to the moving block 206 by eight M8 bolts; a moving block 206 is fixed to the bottom of the target 207 by bolts, and the moving block 206 is made of 316 stainless steel, with a length and width of 120 mm and a height of 150 mm. A sliding track 203 is slidably provided on the moving block 206, and grooves 103 are provided on the inner walls of both sides of the accelerator cavity 1. The two ends of the sliding track 203 are slidably connected to the inner walls of the two grooves 103 respectively, and the sliding track 203 provides support and sliding guidance for the moving block 206.

[0035] The two ends of the sliding track 203 are fixed with springs, which are located in the groove 103. When installed, the sliding track 203 is convenient for extending into the accelerator cavity 1. The sliding track 203 is made of 316 stainless steel, with a diameter of φ20-23mm and a length of 400mm. The surface of the sliding track 203 is smooth, which is convenient for the movement of the moving block 206.

[0036] like Figure 1 , Figure 3 and Figure 4 As shown, the two ends of the target 207 are connected with metal bellows 102, the bellows 201 is made of SUS346 stainless steel, with a diameter of φ15-18mm and a length of 180mm, and two quick connectors 101 are detachably connected to the two metal bellows 102, and the two sides of the accelerator cavity 1 are fixed with metal threaded pipes 102, and the quick connector 101 is fixed in the metal threaded pipe 102, and the end of the metal bellows 102 away from the target 207 is fixed with a quick connector 202, and the quick connector 202 is threadedly connected with the metal threaded pipe 102, and the quick connector 101 is abutted with the quick connector 202, so as to realize the connection between the metal bellows 102 and the quick connector 101. The quick connector 101 and the quick connector 202 are both made of 316 stainless steel, and the model is a four-port quick connector.

[0037] The cold water enters the metal bellows 102 on the left through one of the quick connections 101, then enters the target 207 for cooling, and then is discharged from the metal bellows 102 on the right and enters the quick connection 101 on the right to return to the chiller to form a cycle. The resistivity of the cold water is not less than 16.25MΩ·cm 3 .

[0038] In this embodiment, a reciprocating motion device for driving the target body 207 to move back and forth is installed on the accelerator chamber 1. The reciprocating motion device includes a vacuum servo motor 210 fixed to one side of the accelerator chamber 1. The rated power of the vacuum servo motor 210 is 400W. The interior is completely in a vacuum state. The period of the pulse signal connected to the outside can be set according to the simulation results of the size of the accelerator beam angle to ensure that the ion beam can bombard the target surface of the target body 207 while the target body 207 reciprocates.

[0039] A KF connector 105 is fixed on one side of the accelerator chamber 1, a KF adapter 208 is fixedly mounted on the KF connector 105, a vacuum servo motor 210 is welded on the KF adapter 208, a rotating shaft 204 threadedly connected to the moving block 206 is rotatably mounted in the accelerator chamber 1, and an output shaft of the vacuum servo motor 210 is drivingly connected to the rotating shaft 204. Both the connector 105 and the adapter 208 are standard KF interface forms (standard reference GB / T 6071-2003), which facilitates the sealed connection between the vacuum servo motor 210 and the accelerator chamber 1.

[0040] A bearing 104 is fixed to the side of the accelerator cavity 1 away from the KF connection port 105 , and one end of the rotating shaft 204 is welded to the inner ring of the bearing 104 , so as to realize the rotating connection between the rotating shaft 204 and the accelerator cavity 1 .

[0041] In addition, screw nuts 205 are fixed on both sides of the moving block 206 by bolts, and the screw nuts 205 are threadedly connected to the rotating shaft 204. A mounting hole is opened on the moving block 206, and the rotating shaft 204 passes through the mounting hole and the inner diameter of the mounting hole is larger than the vertical cross-sectional diameter of the rotating shaft 204. There is a gap between the rotating shaft 204 and the inner wall of the mounting hole, and a thread matching the screw nut 205 is provided on the rotating shaft 204, thereby realizing the threaded connection between the moving block 206 and the rotating shaft 204.

[0042] It is worth mentioning that a protrusion is provided at one end of the rotating shaft 204 away from the bearing 104, and a circular hole is provided at one end of the rotating shaft 204, a groove matching the protrusion is provided on the output shaft of the vacuum servo motor 210, and a circular hole is provided on the output shaft of the vacuum servo motor 210, and a latch 209 is inserted between the circular hole and the circular hole, and the latch 209 and the protrusion are inserted into the groove to realize the transmission connection between the output shaft of the vacuum servo motor 210 and the rotating shaft 204.

[0043] The working principle of this embodiment is as follows: cold water enters quick connection 202 from quick connection 101, then enters metal bellows 102 and target 207 in sequence, and returns to the chiller from the right metal bellows 102 and quick connection 101 to form a cycle. At the same time, the vacuum servo motor 210 is started to drive the rotating shaft 204 to rotate, drive the screw nut 205 to move, and drive the target 207 to move. The vacuum servo motor 210 is connected to an external pulse signal to rotate forward in one cycle and reverse in another cycle, driving the target 207 to reciprocate, so that the ion beam bombards different positions on the target surface, so that the target surface is heated more evenly, and the service life of the target is extended.

[0044] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A reciprocating dynamic solid target device, characterized in that: include: An accelerator cavity (1), wherein two sides of the accelerator cavity (1) are fixed with quick connectors (101); A target body (207) is slidably mounted in the accelerator cavity (1) for horizontal movement, wherein two ends of the target body (207) are connected to metal bellows (102), and two quick connectors (101) are detachably connected to the two metal bellows (102); The accelerator cavity (1) is provided with a reciprocating motion device for driving the target body (207) to move back and forth.

2. A reciprocating dynamic solid target device according to claim 1, characterized in that: Metal threaded tubes (102) are fixed on both sides of the accelerator cavity (1), the first quick connection (101) is fixed in the metal threaded tube (102), a second quick connection (202) is fixed at one end of the metal bellows (102) away from the target (207), the second quick connection (202) is threadedly connected to the metal threaded tube (102), and the first quick connection (101) is in abutment with the second quick connection (202).

3. A reciprocating dynamic solid target device according to claim 1, characterized in that: A moving block (206) is fixed to the bottom of the target body (207) by bolts, and a sliding track (203) is slidably provided on the moving block (206). Grooves (103) are provided on the inner walls of both sides of the accelerator cavity (1), and the two ends of the sliding track (203) are respectively slidably connected to the inner walls of the two grooves (103).

4. A reciprocating dynamic solid target device according to claim 3, characterized in that: Springs are fixed at both ends of the sliding track (203), and the springs are located in the groove (103).

5. A reciprocating dynamic solid target device according to claim 4, characterized in that: The reciprocating motion device comprises a vacuum servo motor (210) fixed to one side of the accelerator chamber (1); a KF connection port (105) is fixed to one side of the accelerator chamber (1); a KF adapter (208) is fixedly mounted on the KF connection port (105); the vacuum servo motor (210) is welded to the KF adapter (208); a rotating shaft (204) threadedly connected to a moving block (206) is rotatably mounted in the accelerator chamber (1); and an output shaft of the vacuum servo motor (210) is drivingly connected to the rotating shaft (204).

6. A reciprocating dynamic solid target device according to claim 5, characterized in that: A bearing (104) is fixed to a side of the accelerator chamber (1) away from the KF connection port (105), and one end of the rotating shaft (204) is welded to the inner ring of the bearing (104).

7. The reciprocating dynamic solid target device according to claim 5, characterized in that: Screw nuts (205) are fixed on both sides of the moving block (206) by bolts, and the screw nuts (205) are threadedly connected to the rotating shaft (204). A mounting hole is provided on the moving block (206), and the rotating shaft (204) passes through the mounting hole, and the inner diameter of the mounting hole is larger than the vertical cross-sectional diameter of the rotating shaft (204).

8. The reciprocating dynamic solid target device according to claim 5, characterized in that: A protrusion is provided at one end of the rotating shaft (204) away from the bearing (104), and a circular hole is provided at one end of the rotating shaft (204); a groove matching the protrusion is provided on the output shaft of the vacuum servo motor (210), and a circular hole is provided on the output shaft of the vacuum servo motor (210); a latch (209) is inserted between the circular hole and the circular hole.

9. The reciprocating dynamic solid target device according to claim 3, characterized in that: The target body (207) is made of titanium material, the cross-sectional diameter of the target body (207) is 80-120 mm, the thickness of the target body (207) is 6-16 mm, and the target body (207) is connected to the moving block (206) via M8 bolts.

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