Neutron source fixed moderation collimation automatic switching device

Abstract

The utility model discloses a neutron source fixed moderation collimation automatic switching device, which relates to the technical field of neutron photography, and comprises a track switching mechanism, a moderation collimation shielding mechanism, a shielding chamber and a terminal detection mechanism, and the shielding chamber and the terminal detection mechanism are oppositely arranged at two ends of the track switching mechanism. The moderated collimation shielding mechanism is mounted on the outer side of the track switching mechanism; the moderated collimation shielding mechanism comprises an imaging collimation shielding wall and a component analysis shielding wall. When the device is used for neutron photography, the imaging collimation shielding wall is embedded with the shielding chamber through the track switching mechanism; when the device is used for neutron component analysis, the component analysis shielding wall is embedded with the shielding chamber through the track switching mechanism. The utility model solves the technical problem that in the prior art, neutron photographing and neutron analysis can only be used respectively, and provides the moderation and collimation automatic switching device capable of realizing switching between the neutron photographing function and the neutron component analysis.

Description

Technical Field

[0001] The utility model relates to the technical field of neutron photography, in particular to a neutron source fixed moderation and collimation automatic switching device. Background Art

[0002] In the field of neutron applications, neutron photography and neutron composition analysis both have extensive market applications; however, the neutron beam requirements for neutron photography and neutron composition analysis are different.

[0003] For neutron radiography, the thermal neutron flux density, thermal neutron ratio, and thermal neutron parallelism at the imaging surface are required to be as high as possible. This requires that the slowing-down and collimating path of the neutron radiography collimator be as long as possible. While ensuring a certain thermal neutron flux density, there must be sufficient parallelism to achieve high resolution of neutron radiography.

[0004] For neutron composition analysis, the thermal neutron flux density at the sample to be tested is required to be as high as possible, and the neutron shielding of the gamma detector is appropriately taken into account, while there is no requirement for the parallelism of the beam. This requires that the slowing-down path of the moderation collimator for neutron composition analysis be as short as possible, while taking into account the debugging of the neutron shielding of the gamma detector and increasing the thermal neutron flux density as much as possible.

[0005] In summary, the two detection technologies have different requirements for neutron beam currents, necessitating the design of separate moderation and collimation systems for different detection terminals to achieve optimal detection accuracy. However, existing technologies typically utilize two separate devices for neutron radiography and neutron analysis, each with a fixed neutron beam current and no adjustments. Furthermore, each device is extremely expensive and performs a single function. Utility Model Content

[0006] The purpose of the present invention is to solve the technical problems in the prior art that the neutron beam cannot be adjusted, neutron photography and neutron analysis can only be used in separate offices, but the production and construction costs are high, and the following technical solutions are provided:

[0007] A neutron source fixed moderation and collimation automatic switching device comprises a track switching mechanism, a moderation and collimation shielding mechanism, a shielding room and a terminal detection mechanism. The shielding room and the terminal detection mechanism are arranged at two ends of the track switching mechanism relative to each other, and the moderation and collimation shielding mechanism is installed on the outside of the track switching mechanism; the moderation and collimation shielding mechanism comprises an imaging collimation shielding wall and a component analysis shielding wall.

[0008] When the device is used for neutron radiography, the imaging collimation shielding wall is engaged with the shielding room through a track switching mechanism;

[0009] When the device is used for neutron component analysis, the component analysis shielding wall is engaged with the shielding room through a track switching mechanism.

[0010] The track switching system includes a supporting base, on which a first slide and a sliding assembly are provided. The sliding assembly slides on the first slide. The shielding room and the terminal detection mechanism are relatively arranged at both ends of the first slide and are slidably connected to the first slide. The sliding assembly is arranged between the shielding room and the terminal detection mechanism.

[0011] The sliding assembly includes a sliding seat, a first sliding portion is provided at the bottom of the sliding seat, a second slide is provided at the top, and the first sliding portion is slidably connected to the first slide.

[0012] The slowing down and collimating shielding mechanism also includes a fixed base, and a third slide and a fourth slide are provided at both ends of the fixed base; a second sliding part is provided at the bottom of the imaging collimating shielding wall, and the second sliding part is slidably connected to the third slide; a third sliding part is provided at the bottom of the component analysis shielding wall, and the third sliding part is slidably matched with the fourth slide.

[0013] The second sliding portion and the third sliding portion are both adapted to the second slideway.

[0014] The third slideway and the fourth slideway are arranged parallel to each other.

[0015] The terminal detection mechanism includes a component analysis terminal and an imaging terminal, both of which are fixedly mounted on a support frame, and the support frame is slidably connected to the first slideway.

[0016] Preferably, the first slide is a slide rail, the first sliding part is a slider, and the slide rail and the slider are in sliding cooperation; or, the first slide is a slide groove, the first sliding part is a pulley, and the slide groove and the pulley are in sliding cooperation.

[0017] Preferably, the second slide is a slide rail, the second sliding part and the third sliding part are sliders, and the slide rail is in sliding cooperation with the slider; or, the second slide is a slide groove, the second sliding part and the third sliding part are pulleys, and the slide groove is in sliding cooperation with the pulley.

[0018] Beneficial effects:

[0019] This invention provides a device that can automatically replace different moderator collimation systems according to usage requirements. The position of the neutron source of the device remains unchanged, and the automatic replacement of different moderator collimation systems is achieved only by controlling the position of the mobile moderator collimation system to achieve switching between neutron photography and neutron composition analysis functions, reducing the time for switching between the two experiments and thus improving experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is the enlarged view of point A;

[0022] Figure 3 This is a schematic diagram of the structure of the utility model when used for neutron photography;

[0023] Figure 4 This is a schematic structural diagram of the utility model when used for neutron analysis. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0027] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] See Figures 1 to 4A neutron source fixed moderation and collimation automatic switching device includes a track switching mechanism 1, a moderation and collimation shielding mechanism 2, a shielding room 3, and a terminal detection mechanism 4. The shielding room 3 and the terminal detection mechanism 4 are relatively arranged at the two ends of the track switching mechanism 1, and the moderation and collimation shielding mechanism 2 is installed on the outside of the track switching mechanism 1; the moderation and collimation shielding mechanism 2 includes an imaging collimation moderation shielding wall and a component analysis moderation and collimation shielding wall. The track switching mechanism 1 is used to achieve switching between the imaging collimation shielding wall 21 and the component analysis shielding wall 22; the moderation and collimation shielding mechanism 2 can provide moderation and collimation paths of different lengths according to different usage requirements, because different moderation and collimation channels are installed on the imaging collimation shielding wall 21 and the component analysis shielding wall 22, wherein the function of the shielding wall is to shield neutrons, and the function of the moderation and collimation channel is to slow down and collimate the neutrons into parallel beams. After the shielding room 3 is combined with the imaging collimation shielding wall 21, or after the shielding room 3 is combined with the component analysis shielding wall 22, the shielding room 3 and the shielding wall are used to shield neutrons, so that neutrons can only pass through the slowing down collimation hole to exit the shielding room 3; the terminal detection mechanism 4 is used for imaging and component detection. The imaging collimation shielding wall 21 has a long path, ensuring a certain thermal neutron flux density while having sufficient parallelism for neutron photography; the component analysis shielding wall 22 has a short path, making the thermal neutron flux density at the sample to be tested as high as possible, which is used to provide neutron analysis.

[0029] When the device is used for neutron radiography, the imaging collimation shielding wall 21 is engaged with the shielding room 3 through the track switching mechanism 1 .

[0030] When the device is used for neutron component analysis, the component analysis shielding wall 22 is engaged with the shielding room 3 through the track switching mechanism 1 .

[0031] The track switching system includes a support base 11, on which a first slide 12 and a sliding assembly 13 are provided. The sliding assembly 13 is slidably connected to the first slide 12 and slides on the first slide 12. The shielding room 3 and the terminal detection mechanism 4 are relatively arranged at both ends of the first slide 12 and are slidably connected to the first slide 12. The sliding assembly 13 is arranged between the shielding room 3 and the terminal detection mechanism 4. The shielding room 3 is slidably connected to the first slide 12, and the shielding room 3 can be subsequently slidably adjusted according to usage requirements. Similarly, the terminal detection mechanism 4 is slidably connected to the first slide 12, and the terminal detection mechanism 4 can be subsequently slidably adjusted according to specific usage requirements.

[0032] The sliding assembly 13 includes a slide 131. The bottom of the slide 131 is provided with a first sliding portion, and the top is provided with a second slide 132. The first sliding portion is slidably connected to the first slide 12. The first sliding portion slides on the first slide 12, so that the two move relative to each other.

[0033] The moderation and collimation shielding mechanism 2 also includes a fixed base 25, with a third slide 24 and a fourth slide 23 provided at both ends of the fixed base 25. The third slide 24 and the fourth slide 23 are both aligned with the second slide 132. The bottom of the imaging collimation shielding wall 21 is provided with a second sliding portion, which is slidably connected to the third slide 24. The bottom of the component analysis shielding wall 22 is provided with a third sliding portion, which is slidably engaged with the fourth slide 23. The second and third sliding portions are both slidably engaged with the second slide 132.

[0034] The second sliding portion and the third sliding portion are both adapted to the second slideway 132, and both can slide on the second slideway 132. The third slideway 24 and the fourth slideway 23 are identical to the second slideway 132, so that the imaging collimation shielding wall 21 or the component analysis shielding wall 22 can slide onto the slide 131, and both the third sliding portion and the second sliding portion can slide on the second slideway 132.

[0035] The third slideway 24 and the fourth slideway 23 are arranged parallel to each other.

[0036] The terminal detection mechanism 4 includes a component analysis terminal 41 and an imaging terminal 42 . The component analysis terminal 41 and the imaging terminal 42 are both fixedly mounted on a support frame 43 , and the support frame 43 is slidably connected to the first slideway 12 .

[0037] The shielding room 3 is reserved with an opening for accommodating the imaging collimation shielding wall 21 or the component analysis shielding wall 22 to be embedded. After the imaging collimation shielding wall 21 or the component analysis shielding wall 22 is embedded in the opening of the shielding room 3, the shielding room 3 forms a closed space.

[0038] The first slideway 12 is a slide rail, the first sliding portion is a slider, and the slide rail and the slider are in sliding cooperation;

[0039] Alternatively, the first slideway 12 is a slide groove, the first sliding part is a pulley, and the slide groove and the pulley are in sliding cooperation.

[0040] The second slideway 132 is a slide rail, the second sliding portion and the third sliding portion are sliders, and the slide rail and the slider are slidably engaged;

[0041] Alternatively, the second slideway 132 is a slide groove, the second sliding portion and the third sliding portion are pulleys, and the slide groove is in sliding engagement with the pulleys.

[0042] The working principle of this utility model is:

[0043] When the device needs to be used for neutron radiography, since the first sliding part can slide on the first slide 12, the sliding assembly 13 can be slid from the first slide 12 first, and wait for it to slide to be aligned with the third slide 24. Since the second sliding part can slide on the second slide 132, the staff controls the imaging collimation shielding wall 21 to pass through the second sliding part, and slide from the third slide 24 to the second slide 132. Then, the sliding assembly 13 carrying the imaging collimation shielding wall 21 is slid on the first slide 12, so that the imaging collimation shielding wall 21 is embedded in the open opening reserved in the shielding room 3, the shielding room 3 is closed, and then the equipment is started to perform neutron radiographic analysis.

[0044] When the device needs to be used for neutron composition analysis, since the first sliding part can slide on the first slide 12, the sliding assembly 13 can be slid from the first slide 12 first, and wait for it to slide to be aligned with the fourth slide 23. Since the third sliding part can slide on the second slide 132, the staff controls the imaging collimation shielding wall 21 to pass through the second sliding part and slide from the fourth slide 23 to the second slide 132. Then, the sliding assembly 13 carrying the component analysis shielding wall 22 is slid on the first slide 12, so that the component analysis shielding wall 22 is embedded in the open opening reserved in the shielding room 3, the shielding room 3 is closed, and then the equipment is started to perform neutron composition analysis.

[0045] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A neutron source fixed moderation and collimation automatic switching device, characterized in that: The invention comprises a track switching mechanism (1), a slowing down collimating shielding mechanism (2), a shielding room (3) and a terminal detection mechanism (4); the shielding room (3) and the terminal detection mechanism (4) are relatively arranged at two ends of the track switching mechanism (1); the slowing down collimating shielding mechanism (2) is installed outside the track switching mechanism (1); the slowing down collimating shielding mechanism (2) comprises an imaging collimating shielding wall (21) and a component analysis shielding wall (22); When the device is used for neutron radiography, the imaging collimation shielding wall (21) is engaged with the shielding room (3) via a track switching mechanism (1); When the device is used for neutron component analysis, the component analysis shielding wall (22) is engaged with the shielding room (3) through a track switching mechanism (1).

2. The neutron source fixed moderation and collimation automatic switching device according to claim 1, characterized in that: The track switching mechanism (1) comprises a support base (11), a first slideway (12) and a sliding assembly (13) are provided on the support base (11), the sliding assembly (13) slides on the first slideway (12), the shielding room (3) and the terminal detection mechanism (4) are relatively arranged at two ends of the first slideway (12) and are slidably connected to the first slideway (12), and the sliding assembly (13) is arranged between the shielding room (3) and the terminal detection mechanism (4).

3. The neutron source fixed moderation and collimation automatic switching device according to claim 2, characterized in that: The sliding assembly (13) comprises a sliding seat (131), a first sliding portion is provided at the bottom of the sliding seat (131), and a second slideway (132) is provided at the top, wherein the first sliding portion is slidably connected to the first slideway (12).

4. The neutron source fixed moderation and collimation automatic switching device according to claim 3, characterized in that: The slowing down collimation shielding mechanism (2) further comprises a fixed base (25), and a third slide (24) and a fourth slide (23) are provided at both ends of the fixed base (25); a second sliding portion is provided at the bottom of the imaging collimation shielding wall (21), and the second sliding portion is slidably linked to the third slide (24); a third sliding portion is provided at the bottom of the component analysis shielding wall (22), and the third sliding portion is slidably matched with the fourth slide (23).

5. The neutron source fixed moderation and collimation automatic switching device according to claim 4, characterized in that: The second sliding portion and the third sliding portion are both adapted to the second slideway (132).

6. The neutron source fixed moderation and collimation automatic switching device according to claim 4, characterized in that: The third slideway (24) and the fourth slideway (23) are arranged parallel to each other.

7. The neutron source fixed moderation and collimation automatic switching device according to claim 2, characterized in that: The terminal detection mechanism (4) comprises a component analysis terminal (41) and an imaging terminal (42), wherein the component analysis terminal (41) and the imaging terminal (42) are both fixedly mounted on a support frame (43), and the support frame (43) is slidably connected to the first slideway (12).

8. The neutron source fixed moderation and collimation automatic switching device according to claim 4, characterized in that: The first slideway (12) is a slide rail, the first sliding part is a slider, and the slide rail and the slider are in sliding cooperation; Alternatively, the first slideway (12) is a slide groove, the first sliding part is a pulley, and the slide groove and the pulley are in sliding cooperation.

9. The neutron source fixed moderation and collimation automatic switching device according to claim 4, characterized in that: The second slideway (132) is a slide rail, the second sliding portion and the third sliding portion are sliders, and the slide rail and the slider are in sliding cooperation; Alternatively, the second slideway (132) is a slide groove, the second sliding part and the third sliding part are pulleys, and the slide groove is in sliding cooperation with the pulleys.

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