Nuclear power station radioactive waste barrel collimator opening adjusting device

Abstract

The utility model discloses an opening adjusting device for a collimator of a radioactive waste barrel of a nuclear power station. The opening adjusting device comprises a base, a shell, an inner cylinder and a shielding assembly, the shell is detachably and fixedly installed on the base, the inner cylinder is rotationally connected into the shell, and the shielding assembly is installed between the inner cylinder and the shell; mutually communicated through holes are formed in the base, the inner cylinder and the shell, the shielding assembly comprises a plurality of blocking pieces and at least one driving piece, and the blocking pieces are slidably connected between the inner cylinder and the shell through the driving pieces; the multiple blocking pieces are matched with one another to define an adjusting hole, the inner cylinder is rotated, and the driving piece drives the multiple blocking pieces to move so as to adjust the size of the adjusting hole or completely seal the through hole. By changing the size of the adjusting hole, the beam limiting of large and small beam spots of the radiation source is adjusted, the adjustment is facilitated, the labor intensity is reduced, the adjustment efficiency is improved, the test cost is saved, more beam spots with different sizes can be adjusted for beam limiting, the application range is expanded, and the test efficiency and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power testing technology, and in particular to an adjustment device for the opening of a collimator in a nuclear power plant radioactive waste container. Background Technology

[0002] The radiation collimator is located between the center of the radiation source and the measurement point, serving to shield, limit, and collimate the radiation. The center of the radiation source, the radiation collimator, and the detection system form a complete testing system. The rays reaching the detector at the measurement point through the collimator should ideally originate only from radiation sources within the measurement field of view, minimizing interference from background radiation or other sources. In gamma radiation field measurements, the required aperture needs to be designed in advance based on the detection conditions.

[0003] Aperture adjustment is achieved by machining sleeves of various sizes, which does not allow for continuous and rapid adjustment. Furthermore, this adjustment method becomes cumbersome when beam limiting of the X-ray source is required, necessitating the pre-machining of a series of collimator sleeves of different sizes, which is time-consuming, labor-intensive, and increases testing costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a device for adjusting the opening of the collimator of a radioactive waste container in a nuclear power plant.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A collimator opening adjustment device for a nuclear power plant radioactive waste container is constructed, comprising: a base, an outer shell, an inner cylinder, and a shielding assembly; the outer shell is detachably and fixedly installed on the base, the inner cylinder is rotatably connected inside the outer shell, and the shielding assembly is installed between the inner cylinder and the outer shell; the base, inner cylinder, and outer shell are provided with interconnected through holes; the shielding assembly includes: multiple blocking elements and at least one driving element, the multiple blocking elements are slidably connected between the inner cylinder and the outer shell through the driving element; the multiple blocking elements cooperate to form an adjustment hole, rotating the inner cylinder causes the multiple blocking elements to move to adjust the size of the adjustment hole or completely close the through hole.

[0006] Furthermore, the driving component includes: a driving groove and a limiting groove respectively disposed on the inner cylinder and the outer shell, and a first limiting block and a second limiting block installed on both sides of the barrier; the first limiting block and the second limiting block are respectively inserted into the driving groove and the limiting groove; rotating the inner cylinder drives the driving groove to rotate, so that the driving groove and the limiting groove cooperate to drive the respective barrier away from or close to the center of the through hole.

[0007] Furthermore, the driving groove includes a first proximal position near the center of the through hole and a first distal position away from the center of the through hole, the first proximal position and the first distal position being interconnected; the limiting groove includes a second proximal position near the center of the through hole and a second distal position away from the center of the through hole, the second proximal position and the second distal position being interconnected.

[0008] Furthermore, the drive groove is a regular polygon, and the first limiting block is a rectangle inserted into the drive groove, with the first limiting block in contact with the inner wall of the drive groove.

[0009] Furthermore, the limiting groove is in the shape of multiple slots, and the multiple second limiting blocks are cylindrical and are inserted into their respective limiting grooves.

[0010] Furthermore, the barrier is triangular in shape, and when multiple barrier elements completely seal the through hole, the vertices of the multiple triangular barrier elements coincide with the center of the through hole, and the sides of adjacent barrier elements are in contact with each other.

[0011] Furthermore, the number of the barrier elements is the same as the number of sides of the drive groove.

[0012] Furthermore, the outer shell includes a protective shell and a cover. The protective shell is detachably and fixedly installed on the base. The protective shell has a cavity for storing the inner cylinder. The cover is detachably installed on the protective shell. The limiting groove is formed on the cover.

[0013] Furthermore, the collimator opening adjustment device for the nuclear power plant radioactive waste bin also includes a motor mounted on the base, and the motor is connected to the inner cylinder.

[0014] Furthermore, the collimator opening adjustment device for the nuclear power plant radioactive waste bin also includes a thickening plate that can be detachably stacked on the barrier.

[0015] The following are the beneficial effects of implementing this utility model:

[0016] This application uses multiple blocking elements surrounding the through hole of the outer shell and the through hole of the inner cylinder. The entire collimator is installed at the end of the base away from the multiple blocking elements. The test hole of the collimator is aligned with the through hole of the base. When the size of the adjustment hole is to be adjusted, it is only necessary to drive the multiple blocking elements to move closer to or away from the center of the through hole by the driving element. When the driving element drives the multiple blocking elements to close at the center position of the through hole, the multiple blocking elements will be sealed between the through hole of the outer shell and the through hole of the inner cylinder, so that the collimator cannot be tested. When the driving component moves multiple blocking components away from the center of the through hole, adjustment holes are generated between the multiple blocking components that expand outward. The through holes of the outer shell and the inner cylinder are interconnected through the adjustment holes, allowing the collimator to test the gamma radiation intensity through the adjustment holes. By changing the distance between the multiple blocking components and the axis of the through hole through the driving component, the size of the adjustment holes is changed, thereby adjusting the beam size of the X-ray source. This facilitates adjustment, reduces labor intensity, improves adjustment efficiency, saves testing costs, and enables the adjustment of beam size to be more varied, expanding the applicable range and improving testing efficiency and accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] In the attached image:

[0019] Figure 1 This is a schematic diagram of the structure of the collimator opening adjustment device for a nuclear power plant radioactive waste bin in some embodiments of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the collimator opening adjustment device for a radioactive waste bin in a nuclear power plant, according to some embodiments of this utility model.

[0021] Figure 3 This is a cross-sectional schematic diagram of the outer shell of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the driving component in some embodiments of this utility model;

[0023] Figure 5 This is a schematic diagram of the inner cylinder in this utility model;

[0024] Figure 6 This is a schematic diagram of the barrier component in this utility model;

[0025] Figure 7This is a schematic diagram of the protective cover in this utility model.

[0026] Explanation of markings in the diagram

[0027] Base 1, outer shell 2, protective shell 21, cover 22, inner cylinder 3, shielding assembly 4, barrier 41, driving component 42, driving groove 421, first proximal position 4211, first distal position 4212, limiting groove 422, second proximal position 4221, second distal position 4222, first limiting block 423, second limiting block 424, adjusting hole 43, thickening plate 44, through hole 5, motor 6. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0029] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0031] Please see Figures 1 to 4 The first embodiment of this utility model discloses a collimator opening adjustment device for a nuclear power plant radioactive waste container. This device includes: a base 1, an outer shell 2, an inner cylinder 3, and a shielding assembly 4. The outer shell 2 is detachably and fixedly installed on the base 1. The inner cylinder 3 is rotatably connected inside the outer shell 2. The shielding assembly 4 is installed between the inner cylinder 3 and the outer shell 2. The base 1, inner cylinder 3, and outer shell 2 have interconnected through holes 5. The shielding assembly 4 includes: multiple blocking elements 41 and at least one driving element 42. The multiple blocking elements 41 are slidably connected between the inner cylinder 3 and the outer shell 2 via the driving element 42. The multiple blocking elements 41 cooperate to form an adjustment hole 43. Rotating the inner cylinder 3 causes the driving element 42 to move the multiple blocking elements 41 to adjust the size of the adjustment hole 43 or completely close the through hole 5.

[0032] This application uses multiple blocking elements 41 surrounding the through hole 5 of the outer shell 2 and the through hole 5 of the inner cylinder 3. The entire collimator is installed at the end of the base 1 away from the multiple blocking elements 41. The test hole of the collimator is aligned with the through hole 5 of the base 1. When the size of the adjustment hole 43 is to be adjusted, the multiple blocking elements 41 are driven to move closer to or away from the center of the through hole 5 by the driving element 42. When the driving element 42 drives the multiple blocking elements 41 to close at the center position of the through hole 5, the multiple blocking elements will be sealed between the through hole 5 of the outer shell 2 and the through hole 5 of the inner cylinder 3, so that the collimator cannot be tested. When the driving component 42 moves the multiple blocking components 41 away from the center position of the through hole 5, an adjustment hole 43 is generated between the multiple blocking components 41 that expand outward. The through hole 5 of the outer shell 2 and the through hole 5 of the inner cylinder 3 are interconnected through the adjustment hole 43. Thus, the collimator can test the gamma radiation intensity through the adjustment hole 43. By changing the distance between the multiple blocking components 41 and the axis of the through hole 5 by the driving component 42, the size of the adjustment hole 43 is changed, thereby adjusting the beam size of the X-ray source. This facilitates adjustment, reduces labor intensity, improves adjustment efficiency, saves testing costs, and enables the adjustment of beam size to be more varied, expanding the applicable range and improving testing efficiency and accuracy.

[0033] Please refer to Figure 4In some embodiments, the drive member 42 can drive one of the blocking members 41 to move closer to or away from the axis of the through hole 5 through the interaction of a gear and rack. Then, through the action of a connecting rod, this blocking member 41 drives the other blocking members 41 to move closer to or converge towards the center. The connecting rod can be slidably connected to the housing 2 to limit the movement of the connecting rod, thereby facilitating operation and improving adjustment efficiency.

[0034] Please see Figures 1 to 7 In some embodiments, the driving member 42 includes: a driving groove 421 and a limiting groove 422 respectively disposed on the inner cylinder 3 and the outer shell 2, and a first limiting block 423 and a second limiting block 424 installed on both sides of the barrier member 41; the first limiting block 423 and the second limiting block 424 are respectively inserted into the driving groove 421 and the limiting groove 422; rotating the inner cylinder 3 drives the driving groove 421 to rotate, so that the driving groove 421 and the limiting groove 422 cooperate to drive their respective barrier members 41 away from or close to the center of the through hole 5.

[0035] This application uses a first limiting block 423 and a second limiting block 424, which are respectively inserted into the drive groove 421 and the limiting groove 422. Rotating the inner cylinder 3 causes the drive groove 421 to rotate, so that the drive groove 421 and the limiting groove 422 cooperate to move their respective blocking members 41 away from or towards the center of the through hole 5. A notch can be made in the outer shell 2 to allow personnel to touch the inner cylinder 3 from the outside. Rotating the inner cylinder 3 from the outside causes the drive groove 421 to rotate. The rotating drive groove 421 cooperates with the limiting groove 422, causing the first limiting block 423 to move along the rotating drive groove 421, while the second limiting block 424 moves and rotates within the limiting groove 422. Because the drive groove 421 is inclined relative to the axis of the through hole 5, the first limiting block 423 causes the blocking member 41 to expand outward between the through hole 5 of the outer shell 2 and the through hole 5 of the inner cylinder 3. Furthermore, the shape of the drive groove 421 causes the multiple blocking members 41 to tilt relative to each other, ensuring that the sidewalls of adjacent blocking members 41 contact each other when the size of the adjusting hole 43 is changed back and forth. This prevents gaps from forming when the multiple blocking members 41 move back and forth, resulting in more standardized and stable changes in the size of the adjusting hole 43. This facilitates testing by personnel, improves operation, and further enhances adjustment efficiency and testing accuracy.

[0036] Please see Figures 5 to 7 In some embodiments, the drive groove 421 includes a first proximal position 4211 near the center of the through hole 5 and a first distal position 4212 away from the center of the through hole 5, and the first proximal position 4211 and the first distal position 4212 are connected to each other; the limiting groove 422 includes a second proximal position 4221 near the center of the through hole 5 and a second distal position 4222 away from the center of the through hole 5, and the second proximal position 4221 and the second distal position 4222 are connected to each other.

[0037] This application includes a first proximal position 4211 near the center of the through hole 5 and a first distal position 4212 away from the center of the through hole 5 via a drive groove 421; and a second proximal position 4221 near the center of the through hole 5 and a second distal position 4222 away from the center of the through hole 5 via a limiting groove 422. When enlarging the size of the adjusting hole 43, the inner cylinder 3 is rotated, and the first limiting block 423 and the second limiting block 424 are squeezed by the drive groove 421 and the limiting groove 422 respectively, causing the first limiting block 423 to slide from the first proximal position 4211 to the first distal position 4212 within the drive groove 421. At the same time, the second limiting block 424 slides from the second proximal position 4221 to the second distal position 4222 within the limiting groove 422, causing the first limiting block 423 and the second limiting block 424 to drive the barrier member 41 connected to them away from the center of the through hole 5. The multiple barrier members 41 expand outward, enlarging the size of the adjusting hole 43. When the size of the adjusting hole 43 is reduced, the inner cylinder 3 is rotated in the opposite direction. The driving groove 421 and the limiting groove 422 respectively press against the first limiting block 423 and the second limiting block 424, causing the first limiting block 423 to slide from the first distal point 4212 to the first proximal point 4211 within the driving groove 421. Simultaneously, the second limiting block 424 slides from the second distal point 4222 to the second proximal point 4221 within the limiting groove 422. This causes the first and second limiting blocks 423 and 424 to move the connected barrier members 41 closer to the center of the through hole 5. The multiple barrier members 41 contract inward, reducing the size of the adjusting hole 43. This facilitates adjustment. The first proximal point 4211 and the first distal point 4212 can be configured as an arc-shaped groove or inclined groove, making the rotation of the inner cylinder 3 smoother and less strenuous, reducing labor intensity, and improving the stability of changing the size of the adjusting hole 43.

[0038] Please see Figure 5 and Figure 6 In some embodiments, the drive groove 421 is a regular polygon, and the first limiting block 423 is a rectangle inserted into the drive groove 421, with the first limiting block 423 in contact with the inner wall of the drive groove 421.

[0039] In this application, the drive groove 421 is a regular polygon, and the first limiting block 423 is rectangular and inserted into the drive groove 421, with the first limiting block 423 contacting the inner wall of the drive groove 421. The regular polygonal drive groove 421 can fit more tightly with the rectangular first limiting block 423. Adjustment is more sensitive, reducing the shaking of the blocking member 41 during movement and reducing noise generation.

[0040] The shape of the adjustment hole 43 formed by multiple barrier elements 41 is similar to that of the drive groove 421. Different shapes of the drive groove 421 can be set according to the on-site usage environment, thereby expanding the applicable range.

[0041] Please see Figure 6 and Figure 7 In some embodiments, the limiting groove 422 is in the shape of multiple slots, and the multiple second limiting blocks 424 are cylindrical and are inserted into their respective limiting grooves 422.

[0042] This application utilizes a plurality of slotted grooves 422 and a plurality of cylindrical second limiting blocks 424, which are inserted into their respective corresponding slots 422. The cylindrical shape of the second limiting blocks 424 allows them to slide and rotate simultaneously within the slots 422, making adjustments smoother and less strenuous. The multiple slotted shapes of the limiting grooves 422 facilitate their creation on the outer casing 2, reducing manufacturing costs and improving production efficiency.

[0043] Please see Figures 1 to 6 In some embodiments, the barrier 41 is triangular. When multiple barrier 41 completely seal the through hole 5, the vertices of the multiple triangular barrier 41 coincide with the center of the through hole 5, and the sides of adjacent barrier 41 are in contact with each other.

[0044] This application utilizes triangular-shaped barrier members 41. When multiple barrier members 41 completely seal the through hole 5, the vertices of all triangular barrier members 41 coincide with the center of the through hole 5. The triangular barrier members 41 occupy minimal space when unfolded outwards, and do not create gaps when sealing the through hole 5, preventing interference between them. Therefore, they do not require much space during use, resulting in a compact and lightweight overall structure that is easy to operate. Furthermore, the triangular barrier members 41 are less prone to deformation, extending their service life and ensuring smooth adjustment over a long period.

[0045] Please see Figures 1 to 6 In some embodiments, the number of barrier members 41 is the same as the number of sides of the drive groove 421.

[0046] In this application, the number of blocking elements 41 is the same as the number of sides of the drive groove 421. The drive groove 421 is a regular polygon, with a first limiting block 423 inserted into each side of the groove, facilitating operation between them without interference. This also facilitates statistical analysis during manufacturing, improving production efficiency.

[0047] Please see Figures 1 to 7 In some embodiments, the outer shell 2 includes a protective shell 21 and a cover 22. The protective shell 21 is detachably and fixedly installed on the base 1. The protective shell 21 is provided with a receiving cavity for the storage inner cylinder 3. The cover 22 is detachably installed on the protective shell 21. A limiting groove 422 is formed on the cover 22.

[0048] This application utilizes a protective shell 21 that is detachably and fixedly mounted on a base 1. The protective shell 21 contains a cavity for storing the inner cylinder 3. A cover 22 is detachably mounted on the protective shell 21, and a limiting groove 422 is formed on the cover 22. The cover 22 can be installed on the protective shell 21 using threaded connections, bolts, or screws. During installation, the inner cylinder 3 is first placed inside the protective shell 21. Then, the first limiting block 423 of the barrier 41 is inserted into the drive groove 421. Next, the limiting groove 422 is aligned with the second limiting block 424, allowing the cover 22 to engage with the protective shell 21, thus confining multiple barriers 41 between the cover 22 and the protective shell 21. This facilitates installation, improves installation efficiency, reduces labor intensity, and makes it easier to remove the inner cylinder 3 from the outer shell 2 during maintenance.

[0049] Please see Figures 1 to 2 In some embodiments, the collimator opening adjustment device for the radioactive waste bin of a nuclear power plant also includes a motor 6 mounted on the base 1, and the motor 6 is connected to the inner cylinder 3.

[0050] This application utilizes a motor 6 mounted on the base 1, connected to the inner cylinder 3 via a belt or gear set. Operators simply need to start the motor 6 to rotate the inner cylinder 3 in either the forward or reverse direction, further reducing labor intensity and simplifying operation. The motor 6 can also be connected to an encoder, controlling the number of rotations. Using pre-input values ​​in the encoder, the motor 6 can rotate the inner cylinder 3 to specific positions, allowing multiple obstructions 41 to expand or contract to fit within a few fixed adjustment holes 43, making operation more convenient and labor-saving, further reducing workload.

[0051] Please see Figure 6 In some embodiments, the collimator opening adjustment device for the radioactive waste bin of a nuclear power plant also includes a thickening plate 44 that can be detachably stacked on the barrier 41.

[0052] This application utilizes a thickening sheet 44 that can be detachably stacked on the barrier 41, thereby further altering the gamma ray flux and making it suitable for a wider range of testing environments. The cover 22 is detachably mounted on the protective shell 21, facilitating the stacking of the thickening sheet 44 on the barrier 41 and allowing the number of stacked thickening sheets 44 to be adjusted according to the usage environment. This further expands the applicable environments.

[0053] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A collimator opening adjustment device for a radioactive waste container in a nuclear power plant, characterized in that, include: Base (1), outer shell (2), inner cylinder (3), and shielding assembly (4); The outer shell (2) is detachably and fixedly installed on the base (1), the inner cylinder (3) is rotatably connected inside the outer shell (2), and the shielding assembly (4) is installed between the inner cylinder (3) and the outer shell (2); The base (1), inner cylinder (3) and outer shell (2) are provided with interconnected through holes (5). The shielding assembly (4) includes: multiple barrier elements (41) and at least one driving element (42). The multiple barrier elements (41) are slidably connected between the inner cylinder (3) and the outer shell (2) through the driving element (42). The multiple barrier elements (41) cooperate with each other to form an adjustment hole (43). When the inner cylinder (3) is rotated, the driving element (42) drives the multiple barrier elements (41) to move to adjust the size of the adjustment hole (43) or completely close the through hole (5).

2. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 1, characterized in that, The driving component (42) includes: a driving groove (421) and a limiting groove (422) respectively disposed on the inner cylinder (3) and the outer shell (2), and a first limiting block (423) and a second limiting block (424) installed on both sides of the barrier (41); the first limiting block (423) and the second limiting block (424) are respectively inserted into the driving groove (421) and the limiting groove (422); rotating the inner cylinder (3) drives the driving groove (421) to rotate, so that the driving groove (421) and the limiting groove (422) cooperate to drive the respective barrier (41) away from or close to the center of the through hole (5).

3. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 2, characterized in that, The driving groove (421) includes a first proximal position (4211) near the center of the through hole (5) and a first distal position (4212) away from the center of the through hole (5), and the first proximal position (4211) and the first distal position (4212) are interconnected; the limiting groove (422) includes a second proximal position (4221) near the center of the through hole (5) and a second distal position (4222) away from the center of the through hole (5), and the second proximal position (4221) and the second distal position (4222) are interconnected.

4. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 3, characterized in that, The drive groove (421) is a regular polygon, and the first limiting block (423) is a rectangle inserted into the drive groove (421). The first limiting block (423) is in contact with the inner wall of the drive groove (421).

5. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 4, characterized in that, The limiting groove (422) is in the shape of multiple slots, and the multiple second limiting blocks (424) are cylindrical and are inserted into their respective limiting grooves (422).

6. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 1, characterized in that, The barrier (41) is triangular. When multiple barriers (41) completely seal the through hole (5), the vertices of the multiple triangular barriers (41) coincide with the center of the through hole (5), and the sides of adjacent barriers (41) are in contact with each other.

7. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 4, characterized in that, The number of the barrier members (41) is the same as the number of sides of the drive groove (421).

8. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 2, characterized in that, The outer shell (2) includes a protective shell (21) and a cover (22). The protective shell (21) is detachably and fixedly installed on the base (1). The protective shell (21) is provided with a cavity for storing the inner cylinder (3). The cover (22) is detachably installed on the protective shell (21). The limiting groove (422) is formed on the cover (22).

9. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 1, characterized in that, The collimator opening adjustment device for the radioactive waste bin of the nuclear power plant also includes a motor (6) installed on the base (1), and the motor (6) is connected to the inner cylinder (3).

10. The collimator opening adjustment device for a nuclear power plant radioactive waste container according to claim 1, characterized in that, The collimator opening adjustment device for the radioactive waste bin of the nuclear power plant also includes a thickening plate (44) that can be detachably stacked on the barrier (41).

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