A neutron tube coaxiality detection device

Abstract

This utility model discloses a neutron tube coaxiality testing device, relating to the field of neutron tube technology. It includes: a placement stage for placing pre-assembled neutron tubes, the placement stage having a through hole; a red light generator disposed above the placement stage, the emitting end of the red light generator being opposite to the through hole; a plane mirror disposed below the placement stage; and a gauge disposed on one side of the plane mirror, with the reflecting surface of the plane mirror opposite to the gauge. This utility model provides a simple and efficient neutron tube coaxiality testing device. By testing the coaxiality of pre-assembled neutron tubes, defective tubes can be effectively screened out, saving production costs.

Description

Technical Field

[0001] This utility model relates to the field of neutron tube technology, specifically to a neutron tube coaxiality detection device. Background Technology

[0002] A neutron tube is a miniaturized accelerator-type neutron source that generates high-energy neutrons through deuterium-deuterium / deuterium-tritium fusion reactions. It seals the ion source, accelerating electrodes, target, and getter within a small glass or ceramic vacuum tube. Under the control of an external controller and power supply, the gas released from the getter ionizes within the ion source to produce deuterium / deuterium-tritium mixed ions. The ion beam is then accelerated and bombards the target, triggering a deuterium-deuterium / deuterium-tritium fusion reaction to produce high-energy neutrons. Neutron tubes offer advantages such as small size and portability, shut-off capability, safety and controllability, and ease of operation. They can be used in oil and gas logging, mineral exploration, industrial raw material analysis, and the detection of narcotics and explosives, showing broad development prospects.

[0003] The neutron tube generates neutrons by bombarding the target with an ion beam. Therefore, the ion beam and the target must be kept on the same axis as much as possible. This means that the outlet of the ion source in the neutron tube needs to be aligned with the inlet of the incident electrode. In actual manufacturing process, this means that the coaxiality of all parts involved in the bombardment process needs to be guaranteed.

[0004] To achieve the above alignment requirements, the common method is to use mechanical tooling to maintain coaxiality until all parts are welded and positioned. However, this method can only guarantee the coaxiality of the neutron tube if all parts are properly aligned. If a single part is poorly aligned, the coaxiality of the neutron tube will be poor after welding, and some ions will strike the accelerating electrode surface, creating interference with the electron flow. This results in a high rate of defective neutron tubes, causing waste and increasing production costs. Utility Model Content

[0005] The purpose of this invention is to solve the technical problems of poor coaxiality, high waste rate, and high production cost in the fabrication process of neutron tubes in the prior art, and to provide the following technical solution:

[0006] A neutron tube coaxiality detection device, comprising:

[0007] A placement platform is used to place pre-assembled neutron tubes, and the placement platform is provided with through holes; wherein, the pre-assembled neutron tube is a neutron tube in which only the individual components of the neutron tube are assembled but not welded and fixed, and the individual components inside the pre-assembled neutron tube can be disassembled.

[0008] A red light generator is disposed above the placement platform, with the emitting end of the red light generator positioned opposite the through hole.

[0009] A plane mirror is positioned below the placement platform.

[0010] The inspection tool is disposed on one side of the plane mirror, and the reflecting surface of the plane mirror is disposed opposite to the inspection tool.

[0011] Through the above technical solution, the red light generator emits a red light beam. The beam passes through the pre-assembled neutron tube and the through hole. After being reflected by the plane mirror, the beam is projected onto the fixture and forms a light spot on the fixture. The fixture determines whether the coaxiality of each component in the pre-assembled neutron tube is qualified by detecting the light spot.

[0012] A neutron tube coaxiality testing device further includes a support rod, which is disposed on the side opposite to the plane mirror. The inspection tool is movably connected to the support rod and can move up and down on the support rod.

[0013] The above technical solution allows the gauge to move vertically up and down on the support rod, enabling the gauge to move vertically according to the specific working conditions during use, so that the gauge can complete the light alignment, and the detection device can be flexibly adjusted according to the neutron tube and the gauge.

[0014] The fixture is provided with a large aperture and a small aperture for light focusing. The large aperture and the small aperture are coaxially arranged to form a double-layered stepped aperture. The aperture diameter of the large aperture is the same as the diameter of the light spot, and the light spot is formed by the light beam emitted by the red light generator illuminating the fixture. The aperture diameter of the small aperture is the same as the small aperture in the ion source emission outlet or the acceleration electrode inlet of the neutron tube.

[0015] In the above technical solution, the large aperture is used to calibrate the alignment of the detection optical path, facilitating quick testing of the alignment accuracy of the detection optical path by personnel. If the light spot matches the aperture of the large aperture, the detection optical path is aligned; if the light spot does not match the aperture of the large aperture, the detection optical path is not aligned. This can be corrected by adjusting the position of the fixture on the support rod to adjust the alignment of the optical path from the detection beam to the fixture. The small aperture is used to test the coaxiality of the pre-assembled neutron tube. The beam emitted from the red light generator passes through the ion source outlet and the accelerating electrode inlet inside the neutron tube, and then is reflected onto the fixture by the plane mirror. If the size of the light spot produced by the beam is exactly matched to the small aperture, the coaxiality of the pre-assembled neutron tube is good; if the match is insufficient, it indicates that the coaxiality of the pre-assembled neutron tube is poor.

[0016] Preferably, the inspection tool is made of transparent plexiglass.

[0017] A neutron tube coaxiality testing device further includes a fixing component for fixing a pre-assembled neutron tube, the fixing component being positioned above the placement platform.

[0018] The fixing component is connected to the support rod via a connecting rod, which can move up and down on the support rod.

[0019] In the above technical solution, the fixing component can be driven to move up and down in the vertical direction on the support rod according to the length of the pre-assembled neutron tube, so as to fix the pre-assembled neutron tube on the placement platform, making the testing device suitable for coaxiality testing of neutron tubes of different sizes.

[0020] Preferably, the fixing component is a three-jaw chuck. The three-jaw chuck fixes the cylindrical neutron tube more conveniently and stably.

[0021] The gauge is connected to the support rod via a connector, which moves up and down on the support rod and is detachably connected to the gauge.

[0022] In the above technical solution, the inspection tool is detachably connected to the connector, which allows for the replacement of different inspection tools according to the size parameters of the neutron tube being inspected.

[0023] The support rod is connected to the connector via a vertically mounted linear motor. The stator of the linear motor is fixedly connected to the support rod, and the mover of the linear motor is fixedly connected to the connector.

[0024] In the above technical solution, the gauge moves up and down on the support rod using a linear motor. Furthermore, the linear motor is easy to operate and has high precision.

[0025] The red light generator was replaced with a laser emitter.

[0026] The beneficial effects of this utility model are:

[0027] This invention proposes a testing device for testing the coaxiality of pre-assembled neutron tubes using a light beam. The testing method of this device is simple and rapid, and it can test the coaxiality of the assembled neutron tube before the components of the neutron tube are welded, reducing the possibility of defective tubes due to poor coaxiality and saving costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the cross-sectional structure of the inspection tool.

[0030] In the diagram: 1. Placement stage, 2. Pre-assembled neutron tube, 3. Through hole, 4. Red light generator, 5. Plane mirror, 6. Inspection tool, 7. Support rod, 8. Large aperture for light focusing, 9. Small aperture for light focusing, 10. Fixing component, 11. Connecting rod, 12. Connector. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] See Figure 1 and Figure 2A neutron tube coaxiality testing device includes: a placement stage 1 for placing a pre-assembled neutron tube 2, the placement stage 1 having a through hole 3; wherein the pre-assembled neutron tube 2 is a neutron tube in which only the individual components of the neutron tube are assembled but not welded and fixed, and the individual components within the pre-assembled neutron tube 2 can be disassembled. A red light generator 4 is disposed above the placement stage 1, the emitting end of the red light generator 4 being opposite to the through hole 3. A plane mirror 5 is disposed below the placement stage 1. A gauge 6 is disposed on one side of the plane mirror 5, and the reflecting surface of the plane mirror 5 is opposite to the gauge 6. The through hole 3 is a channel reserved for the beam emitted by the red light generator 4. Preferably, the diameter of the through hole 3 is slightly smaller than the diameter of the neutron tube, but larger than the large aperture of the ion source outlet or accelerating electrode inlet of the neutron tube, to ensure the stability of the pre-assembled neutron tube 2 when placed on the placement stage 1. Through the above technical solution, the light beam emitted by the red light generator 4 passes through the pre-assembled neutron tube 2 and the through hole 3, and after being reflected by the plane mirror 5, the light beam is projected onto the fixture 6, forming a light spot on the fixture 6. The fixture 6 determines whether the coaxiality of each component inside the pre-assembled neutron tube 2 is qualified by detecting the light spot. It should be noted that if the supporting legs of the placement stage 1 obstruct the path of the light beam emitted by the red light generator 4 after being reflected by the plane mirror 5 and illuminating the fixture 6, a channel must be made to ensure that the light beam can pass through.

[0037] A neutron tube coaxiality testing device further includes a support rod 7, which is disposed on the opposite side of the plane mirror 5. A gauge 6 is movably connected to the support rod 7, and the gauge 6 can move vertically on the support rod 7. In this design, the gauge 6 can move vertically up and down on the support rod 7, allowing it to adjust vertically according to specific working conditions during use. This enables the gauge 6 to align with the light source, and allows the testing device to be flexibly adjusted based on the neutron tube and the gauge 6.

[0038] The fixture 6 is provided with a large focusing aperture 8 and a small focusing aperture 9. The large focusing aperture 8 and the small focusing aperture 9 are coaxially arranged to form a double-layer stepped aperture. The aperture diameter of the large focusing aperture 8 is the same as the diameter of the light spot, which is formed by the light beam emitted by the red light generator 4 illuminating the fixture 6. The aperture diameter of the small focusing aperture 9 is the same as the small aperture in the ion source emission outlet or accelerating electrode inlet of the neutron tube. In the above design, the large focusing aperture 8 is used to calibrate the alignment of the detection optical path, facilitating the quick detection of the alignment accuracy of the detection optical path of the detection device by the operator. If the light spot is the same as the aperture diameter of the large focusing aperture 8, the detection optical path is aligned; if the light spot is not the same as the aperture diameter of the large focusing aperture 8, the detection optical path is not aligned. The alignment of the detection beam to the fixture 6 can be adjusted by adjusting the position of the fixture 6 on the support rod 7. The aperture 9 is used to detect the coaxiality of the pre-assembled neutron tube 2. The light beam emitted from the red light generator 4 passes through the ion source outlet and the accelerating electrode inlet inside the neutron tube, and is then reflected onto the fixture 6 by the plane mirror 5. If the size of the light spot produced by the light beam is exactly matched with the aperture 9, the coaxiality of the pre-assembled neutron tube 2 is good. If the matching is not good, it means that the ion source outlet and the accelerating electrode inlet are not coaxial, and there is light path obstruction caused by the misalignment, which indicates that the coaxiality of the pre-assembled neutron tube 2 is poor.

[0039] Preferably, the inspection tool 6 is made of transparent plexiglass.

[0040] A neutron tube coaxiality testing device further includes a fixing component 10, which is used to fix a pre-assembled neutron tube 2. The fixing component 10 is positioned above the placement platform 1. The fixing component 10 is connected to the support rod 7 via a connecting rod 11, which moves up and down on the support rod 7. In the above technical solution, the fixing component 10 can be moved vertically up and down on the support rod 7 via the connecting rod 11 according to the length of the pre-assembled neutron tube 2, thereby fixing the pre-assembled neutron tube 2 on the placement platform 1. This makes the testing device suitable for coaxiality testing of neutron tubes of different sizes.

[0041] In one embodiment, the upper end of the support rod 7 is fixedly connected to the stator of the linear motor, and the connecting rod 11 is fixedly connected to the mover of the linear motor. The stator and mover of the linear motor slide against each other, generating relative motion. The fixing assembly 10 is fixedly connected to the connecting rod 11. The movement of the mover of the linear motor drives the connecting rod 11 to move up and down in the vertical direction, and the movement of the connecting rod 11 drives the fixing assembly 10 to move up and down in the vertical direction.

[0042] The fixing component 10 is a three-jaw chuck. The three-jaw chuck fixes the cylindrical neutron tube more conveniently and stably.

[0043] The gauge 6 is connected to the support rod 7 via a connector 12. The connector 12 moves up and down on the support rod 7, and the connector 12 is detachably connected to the gauge 6. The detachable connection of the gauge 6 to the connector 12 allows for the replacement of different gauges 6 based on the dimensional parameters of the neutron tube being inspected.

[0044] The support rod 7 is connected to the connector 12 via a vertically mounted linear motor. The stator of the linear motor is fixedly connected to the support rod 7, and the mover of the linear motor is fixedly connected to the connector 12. The linear motor enables the gauge 6 to move up and down on the support rod 7, and it is convenient to operate and offers high precision.

[0045] The red light generator was replaced with a laser emitter.

[0046] The working principle of this utility model is as follows:

[0047] This device uses a beam illumination method to check the coaxiality of the pre-assembled neutron tube. Before starting the test, the red light generator is turned on to perform an alignment test on the transmission optical path. The optical path of the beam emitted by the red light generator is red light generator - plane mirror 5 - large aperture 8. If the light spots formed by the beam emitted by the red light generator match the large aperture 8 in the optical path, the optical path alignment is confirmed. If the light spots formed by the beam emitted by the red light generator do not match the large aperture 8, the linear motor is turned on to adjust the position of the fixture 6 on the support rod 7 until the light spots formed by the beam emitted by the red light generator match the large aperture 8.

[0048] After adjusting the optical path alignment, the pre-assembled neutron tube 2 is placed vertically on the placement stage 1. The position of the fixing component 10 on the support rod 7 is adjusted according to the height of the pre-assembled neutron tube 2, so that the fixing component 10 holds the pre-assembled neutron tube 2 in place, thus fixing the neutron tube on the placement stage 1. Then, the red light generator is activated. The optical path of the beam emitted by the red light generator is: red light generator - pre-assembled neutron tube 2 - plane mirror 5 - focusing aperture 9. During the optical path transmission, the degree of matching between the light spot formed by the beam emitted by the red light generator and the focusing aperture 9 is checked to confirm coaxiality. If the light spot formed by the beam emitted by the red light generator matches the light-aligning aperture 9, the coaxiality of the pre-assembled neutron tube 2 is confirmed to be qualified, and the pre-assembled neutron tube 2 can then be welded. If the light spot formed by the beam emitted by the red light generator does not match the light-aligning aperture 9, the coaxiality of the pre-assembled neutron tube 2 is unqualified. The operator can remove the components of the neutron tube in the order of accelerating electrode - insulating ceramic tube - ion source shell for inspection. The component with unqualified coaxiality can be detected. Then, the component is replaced and adjusted, and the above inspection steps are repeated until the pre-assembled neutron tube 2 is qualified, and then welding is performed.

[0049] In summary, this utility model provides a simple and efficient neutron tube coaxiality detection device. By detecting the coaxiality of pre-assembled neutron tubes, defective tubes can be effectively screened out, saving production costs.

[0050] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A neutron tube coaxiality detection device, characterized by, include: A placement platform for placing pre-assembled neutron tubes, the placement platform being provided with through holes; A red light generator is disposed above the placement platform, with the emitting end of the red light generator facing the through hole; A plane mirror is disposed below the placement platform; The inspection fixture is disposed on one side of the plane mirror, and the reflecting surface of the plane mirror is disposed opposite to the inspection fixture.

2. A neutron tube coaxiality detection device as claimed in claim 1, characterized in that It also includes a support rod, which is disposed on the side opposite to the plane mirror. The inspection tool is movably connected to the support rod and can move up and down on the support rod.

3. A neutron tube coaxiality detection device as claimed in claim 1, characterized in that The fixture is provided with a large aperture and a small aperture for light focusing. The large aperture and the small aperture are coaxially arranged to form a double-layered stepped aperture. The aperture diameter of the large aperture is the same as the diameter of the light spot, and the light spot is formed by the light beam emitted by the red light generator illuminating the fixture. The aperture diameter of the small aperture is the same as the small aperture in the ion source emission outlet or the acceleration electrode inlet of the neutron tube.

4. A neutron tube coaxiality detection device as claimed in claim 1, characterized in that The inspection tool is made of transparent acrylic glass.

5. A neutron tube coaxiality detection device as claimed in claim 2, characterized in that It also includes a fixing component for fixing the pre-assembled neutron tube, the fixing component being positioned above the placement platform.

6. A neutron tube coaxiality detection device as claimed in claim 5, characterized in that The fixing component is connected to the support rod via a connecting rod, which can move up and down on the support rod.

7. A neutron tube coaxiality detection device as claimed in claim 5, characterized in that The fixing component is a three-jaw chuck.

8. A neutron tube coaxiality detection device as claimed in claim 2, characterized in that The gauge is connected to the support rod via a connector, which moves up and down on the support rod and is detachably connected to the gauge.

9. A neutron tube coaxiality detection apparatus as claimed in claim 8, characterized in that The support rod is connected to the connector via a vertically mounted linear motor. The stator of the linear motor is fixedly connected to the support rod, and the mover of the linear motor is fixedly connected to the connector.

10. A neutron tube coaxiality detection device as claimed in claim 1, characterized in that The red light generator was replaced with a laser emitter.

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