A passive stop device for a radioactive waste container conveying system in a nuclear power plant
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2026-08-14
AI Technical Summary
该方案过于依赖操作员的手动操作以及驱动装置的可靠性，且由于设置在辊道的辊筒下方，检修极为不便利，费时费力，还不稳定
本申请通过摆渡辊道向平行传输辊道对接的过程中，驱动件在平行传输辊道的端部拨动止挡件进行正向转动，直到止挡件的最高点低于平行传输辊道的辊筒最高点，摆渡辊道带动驱动件与止挡件分离，没有驱动件限位的止挡件在自身重力的作用下会进行反向转动，使止挡件进行自动复位，让其最高点高于平行传输辊道的辊筒最高点，立起来的止挡件将下一个放射性废物桶阻挡在该平行传输辊道。整个止挡件运行的过程中不需要电气驱动，也不需要操作人员进行干涉，增加了用于核电厂放射性废物桶输送系统的非能动止挡装置运行过程中的可靠性，减轻了操作难度，提高了输送的效率，结构简单，便于进行制作。当平行传输辊道与摆渡辊道分离后，操作人员可以在平行传输辊道的端部轻易的查看止挡件的状态，及时的进行维护，检修起来更加简单便利，省时省力。
Smart Images
Figure CN224632458U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nuclear power waste container conveying technology, and in particular to a passive stop device for a nuclear power plant radioactive waste container conveying system. Background Technology
[0002] Nuclear power plants generate wet waste such as radioactive waste resin and concentrate during operation. A cement solidification system is needed to uniformly mix this wet waste in metal drums, forming a stable cement solid. These cement solidified metal drums require parallel conveyor rollers at different stations for processes such as feeding, mixing, capping, and hoisting. To maximize space utilization, two parallel conveyor rollers are typically installed, with a shuttle roller conveyor connecting them. When one roller is not connected to the shuttle roller conveyor, there is a risk that the radioactive waste drum may fall off the conveyor during transport due to issues with sensors and the roller conveyor motor's braking mechanism. Therefore, a stop device is generally required at the open end of the conveyor rollers.
[0003] Existing stop devices are generally electrically or pneumatically driven. When the roller conveyor is in the open position, it is not connected to the parallel conveyor, and the operator manually raises the stop device. This solution relies too heavily on manual operation and the reliability of the drive device. Furthermore, because it is located below the rollers of the roller conveyor, maintenance is extremely inconvenient, time-consuming, labor-intensive, and unstable. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a passive stop device for a radioactive waste container conveying system in a nuclear power plant.
[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A passive stop device for a radioactive waste container conveying system in a nuclear power plant is constructed, comprising: a stop member installed on a parallel conveyor roller conveyor, and at least one driving member installed on a shuttle roller conveyor. Both the stop member and the driving member cooperating with it are disposed between the parallel conveyor roller conveyor and the shuttle roller conveyor. During the process of the shuttle roller conveyor connecting to the parallel conveyor roller conveyor, the driving member pushes the stop member at the end of the parallel conveyor roller conveyor to rotate in the forward direction until the highest point of the stop member is lower than the highest point of the roller of the parallel conveyor roller conveyor. When the shuttle roller conveyor separates from the parallel conveyor roller conveyor, the shuttle roller conveyor drives the driving member to separate from the stop member, and the stop member rotates in the reverse direction under its own gravity, so that the highest point of the stop member is higher than the highest point of the roller of the parallel conveyor roller conveyor.
[0006] Furthermore, the stop member includes a limiting part, a rotating part, and a counterweight part. The stop member is rotatably connected to the end of the parallel conveyor roller table via the rotating part. The limiting part is disposed at one end of the rotating part. The counterweight part is disposed at the other end of the rotating part and is in contact with or separate from the driving member. The weight of the counterweight part is greater than the weight of the limiting part. In the free state, the highest point of the limiting part is higher than the highest point of the roller of the parallel conveyor roller table.
[0007] Furthermore, during the process of the drive component contacting or separating from the counterweight, the bottom end of the counterweight is always lower than the rotation axis of the rotating part.
[0008] Furthermore, the passive stop device for the nuclear power plant radioactive waste container conveying system also includes a counterweight installed on the stop member, the counterweight being located on the side of the counterweight part away from the drive member.
[0009] Furthermore, a buffer pad is provided on the side of the limiting part facing the parallel conveyor roller, and the weight of the buffer pad and the limiting part is less than the weight of the counterweight and the counterweight component.
[0010] Furthermore, the driving component includes a mounting base and a deflector wheel. The mounting base is detachably mounted on the ferry roller conveyor. The deflector wheel is rotatably connected to the mounting base and is in contact with or separate from the counterweight.
[0011] Furthermore, the mounting base includes a mounting portion and an abutment portion, the mounting portion and the abutment portion being L-shaped, the mounting portion being detachably mounted above the ferry roller conveyor, the abutment portion being in contact with the side of the ferry roller conveyor, and the actuating wheel being rotatably connected to the abutment portion.
[0012] Furthermore, the passive stop device of the parallel conveyor roller conveyor for radioactive waste bins in the nuclear power plant also includes a brake installed on the parallel conveyor roller conveyor to limit the swing amplitude of the stop.
[0013] Furthermore, the braking component is a torsion spring disposed between the rotating part and the parallel conveyor roller, or a magnetic component that is magnetically attracted and limited at the bottom end of the stop component.
[0014] Furthermore, the stop member is a polygonal plate structure, and the driving member is a cylinder or a polyhedron.
[0015] The following are the beneficial effects of implementing this utility model: In this application, during the docking process between the shuttle roller conveyor and the parallel conveyor roller conveyor, the driving component at the end of the parallel conveyor roller conveyor actuates the stop component to rotate forward until the highest point of the stop component is lower than the highest point of the parallel conveyor roller conveyor. The shuttle roller conveyor then causes the driving component to separate from the stop component. Without the driving component's restraint, the stop component rotates in the opposite direction under its own weight, automatically resetting itself so that its highest point is higher than the highest point of the parallel conveyor roller conveyor. The upright stop component then blocks the next radioactive waste container on the parallel conveyor roller conveyor. The entire operation of the stop component requires no electrical drive or operator intervention, increasing the reliability of the passive stop device used in the radioactive waste container conveying system of nuclear power plants, reducing operational difficulty, improving conveying efficiency, and featuring a simple structure that is easy to manufacture. After the parallel conveyor roller conveyor separates from the shuttle roller conveyor, operators can easily check the status of the stop component at the end of the parallel conveyor roller conveyor, enabling timely maintenance and making repairs simpler, more convenient, and time-saving. Attached Figure Description
[0016] 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.
[0017] In the attached image: Figure 1 This is a schematic diagram of the installation position of a passive stop device for a nuclear power plant radioactive waste bin conveying system in some embodiments of this utility model. Figure 2 This is a schematic diagram showing the installation positions of the driving component and the stop component in some embodiments of this utility model; Figure 3 This is a schematic diagram showing the operating positions of the driving component and the stop component in some embodiments of this utility model; Figure 4 This is a three-dimensional structural schematic diagram of the stop member in some embodiments of this utility model; Figure 5 This is a schematic diagram showing the installation position of the counterweight in some embodiments of this utility model; Figure 6 This is a schematic diagram of the installation position of the brake component in some embodiments of this utility model; Figure 7 This is a schematic diagram of the installation position of the driving component in some embodiments of this utility model; Figure 8 This is a three-dimensional structural schematic diagram of the driving component in some embodiments of this utility model.
[0018] Explanation of markings in the diagram Parallel conveyor roller 1, stop 2, limiting part 21, rotating part 22, counterweight part 23, transfer roller 3, drive part 4, mounting base 41, mounting part 411, abutting part 412, actuating wheel 42, counterweight part 5, buffer pad 6, brake part 7, radioactive waste bin 8. Detailed Implementation
[0019] 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.
[0020] 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.
[0021] 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.
[0022] Please see Figures 1 to 4 , Figure 7 and Figure 8 The passive stop device for a radioactive waste container conveying system in a nuclear power plant, as described in the first embodiment of this utility model, includes: a stop 2 installed on a parallel conveyor roller 1, and at least one drive 4 installed on a transfer roller 3. Both the stop 2 and the cooperating drive 4 are positioned between the parallel conveyor roller 1 and the transfer roller 3. During the docking process between the transfer roller 3 and the parallel conveyor roller 1, the drive 4 actuates the stop 2 at the end of the parallel conveyor roller 1, causing it to rotate forward until the highest point of the stop 2 is lower than the highest point of the rollers of the parallel conveyor roller 1. When the transfer roller 3 separates from the parallel conveyor roller 1, the transfer roller 3 causes the drive 4 to separate from the stop 2. The stop 2 then rotates in the opposite direction under its own weight, causing its highest point to be higher than the highest point of the rollers of the parallel conveyor roller 1.
[0023] In this application, during the docking process between the transfer roller conveyor 3 and the parallel transfer roller conveyor 1, the drive unit 4 actuates the stop 2 at the end of the parallel transfer roller conveyor 1 to rotate forward until the highest point of the stop 2 is lower than the highest point of the rollers of the parallel transfer roller conveyor 1. At this point, the transfer roller conveyor 3 is just docked with the end of the parallel transfer roller conveyor 1. Through the motors, chains, and sprockets on the parallel transfer roller conveyor 1 and the transfer roller conveyor 3, the rollers of the parallel transfer roller conveyor 1 are rotated, thus removing the radioactive waste located on the parallel transfer roller conveyor 1. Radioactive waste containers 8 are conveyed onto the transfer roller conveyor 3. After all radioactive waste containers 8 have moved onto the transfer roller conveyor 3, the transfer roller conveyor 3 separates from the parallel transport roller conveyor 1. At the same time, the transfer roller conveyor 3 drives the drive component 4 to separate from the stop component 2. Without the limit of the drive component 4, the stop component 2 will rotate in the opposite direction under its own gravity, causing the stop component 2 to automatically reset, so that its highest point is higher than the highest point of the rollers of the parallel transport roller conveyor 1. The upright stop component 2 blocks the next radioactive waste container 8 on the parallel transport roller conveyor 1. The entire operation of the stop component 2 does not require electrical drive or operator intervention, which increases the reliability of the passive stop device in the radioactive waste container conveying system of nuclear power plants, reduces the difficulty of operation, improves the conveying efficiency, and has a simple structure, making it easy to manufacture, install and maintain, saving time and labor.
[0024] By placing both the stop component 2 and its cooperating drive component 4 between the parallel conveyor roller conveyor 1 and the transfer roller conveyor 3, operators can easily inspect the status of the stop component 2 at the end of the parallel conveyor roller conveyor 1 after the two conveyors separate, allowing for timely maintenance and making repairs simpler and more convenient. Similarly, after the parallel conveyor roller conveyor 1 and the transfer roller conveyor 3 separate, operators can easily inspect the status of the drive component 4 at the end of the transfer roller conveyor 3, allowing for timely maintenance and improving the stability of the conveying system while reducing labor intensity.
[0025] Please see Figures 3 to 5 In some embodiments, the stop member 2 includes a limiting part 21, a rotating part 22, and a counterweight part 23. The stop member 2 is rotatably connected to the end of the parallel conveyor roller 1 through the rotating part 22. The limiting part 21 is disposed at one end of the rotating part 22, and the counterweight part 23 is disposed at the other end of the rotating part 22, and is in contact with or separated from the drive member 4. The weight of the counterweight part 23 is greater than the weight of the limiting part 21. In the free state, the highest point of the limiting part 21 is higher than the highest point of the roller of the parallel conveyor roller 1.
[0026] This application uses a stop 2 to be rotatably connected to the end of the parallel conveyor roller 1 via a rotating part 22. A limiting part 21 is provided at one end of the rotating part 22, and a counterweight part 23 is provided at the other end of the rotating part 22. When the transfer roller 3 docks or separates from the parallel conveyor roller 1, it drives the driving part 4 to contact or separate from the counterweight part 23. During the docking process, the transfer roller 3 will drive the counterweight part 23 to rotate forward through the driving part 4. The forward rotating counterweight part 23 will drive the limiting part 21 to rotate forward through the rotating part 22, causing the counterweight part 23 to rotate upward and rise. Meanwhile, the limiting part 21 located at the other end of the rotating part 22 will rotate downward and lower until the transfer roller 3 and the parallel conveyor roller 1 are fully docked. The highest point of the rotating part 22 is lower than the highest point of the roller of the parallel conveyor roller 1, and the radioactive waste container 8 can be transported from the parallel conveyor roller 1 to the transfer roller 3.
[0027] When the shuttle roller conveyor 3 separates from the parallel conveyor roller conveyor 1, because the weight of the counterweight 23 is greater than the weight of the limiting part 21, the center of gravity of the stop 2 is lowered. Under its own weight, during the separation process of the shuttle roller conveyor 3 and the parallel conveyor roller conveyor 1, the counterweight 23 will rotate in the opposite direction as the drive member 4 moves. After the counterweight 23 reaches the vertical position, the drive member 4 continues to move, and the counterweight 23 separates from the drive member 4. At the same time, during the reverse rotation process, the drive member 4 will drive the limiting part located at the other end of the rotating part 22. 21 rotates upward and rises until the counterweight 23 reaches the vertical position, so that the highest point of the limiting part 21 in the free state is higher than the highest point of the roller of the parallel conveyor roller 1, and the radioactive waste container 8 on the parallel conveyor roller 1 is blocked again. The whole process is responsive, simple in structure, not prone to failure, and improves stability. It is also easy to install on the existing transfer roller 3 and parallel conveyor roller 1, saving manufacturing costs. It can automatically complete the blocking and release of the radioactive waste container 8, reducing the labor intensity of the operators.
[0028] Please see Figures 3 to 5 In some embodiments, during the process of the drive member 4 contacting or separating from the counterweight 23, the bottom end of the counterweight 23 is always lower than the rotation axis of the rotating part 22.
[0029] During the contact or separation process between the driving component 4 and the counterweight 23, the bottom end of the counterweight 23 is always lower than the rotation axis of the rotating part 22. This ensures that the counterweight 23 will not rotate more than 90° while the driving component 4 is rotating it. In this way, when the transfer roller 3 separates from the parallel transmission roller 1, the counterweight 23 can always automatically rotate in the opposite direction and descend, reducing the jamming when the limiting part 21 rotates upward, making it more responsive, reducing the occurrence of failures, and improving the blocking efficiency.
[0030] Please see Figures 3 to 5 In some embodiments, the passive stop device for the nuclear power plant radioactive waste container conveying system further includes a counterweight 5 mounted on the stop 2, the counterweight 5 being located on the side of the counterweight 23 away from the drive member 4.
[0031] This application utilizes a counterweight 5 installed on the stop 2. The counterweight 5 is located on the side of the counterweight 23 away from the drive member 4. By using the counterweight 5, the center of gravity at one end of the counterweight 23 can be further increased, thereby making the stop 2 more sensitive when rotating in the reverse direction and reducing the occurrence of jamming. The application can decide whether to add a counterweight 5 to the stop 2 according to the environment of use, thereby expanding the scope of use and making it suitable for more environments. It can further lower the center of gravity at one end of the counterweight 23, increase the sensitivity of the stop 2 when rotating in the reverse direction, and improve the blocking efficiency.
[0032] Please see Figures 3 to 5 In some embodiments, a buffer pad 6 is provided on the side of the limiting part 21 facing the parallel conveyor roller 1, and the weight of the buffer pad 6 and the limiting part 21 is less than the weight of the counterweight part 23 and the counterweight 5.
[0033] This application includes a buffer pad 6 on the side of the limiting part 21 facing the parallel conveyor roller 1. The weight of the buffer pad 6 and the limiting part 21 is less than the weight of the counterweight part 23 and the counterweight 5. The buffer pad 6 can alleviate the impact force between the limiting part 21 and the radioactive waste container 8, providing a certain degree of protection for the radioactive waste container 8 and the limiting part 21, extending their service life, reducing leakage of the radioactive waste container 8 during transportation, and thus also providing a certain degree of protection for the surrounding environment, improving safety.
[0034] The buffer pad 6, which is installed on the limiting part 21, has a thickness that does not exceed the gap between the limiting part 21 and the end of the parallel conveyor roller 1. This is to prevent the buffer pad 6 from interfering with the rotation of the stop 2, thus making its rotation smoother. The weight of the buffer pad 6 and the limiting part 21 is less than the weight of the counterweight part 23 and the counterweight 5. Similarly, this is to lower the center of gravity of the stop 2, making the stop 2 more smooth and sensitive when rotating in the reverse direction, thereby improving the blocking efficiency.
[0035] Please see Figure 7 and Figure 8 In some embodiments, the drive element 4 includes a mounting base 41 and a deflector wheel 42. The mounting base 41 is detachably mounted on the ferry roller conveyor 3, and the deflector wheel 42 is rotatably connected to the mounting base 41 and is in contact with or separate from the counterweight 23.
[0036] This application allows for detachable mounting of the drive unit 4 onto the shuttle roller conveyor 3 via the mounting base 41. The actuating wheel 42 is rotatably connected to the mounting base 41 and can contact or separate from the counterweight 23. The mounting base 41 facilitates the installation of the drive unit 4 onto the shuttle roller conveyor 3. The actuating wheel 42, rotating on the mounting base 41, can rotate on its own after contacting the counterweight 23, reducing wear on the actuating wheel 42 and the counterweight 23 and extending their service life. The rotation of the actuating wheel 42 also reduces the resistance of the stop 2 to the shuttle roller conveyor 3, making the forward rotation of the stop 2 smoother and less strenuous, reducing energy consumption, and improving sensitivity.
[0037] Please see Figure 8 In some embodiments, the mounting base 41 includes a mounting portion 411 and an abutment portion 412. The mounting portion 411 and the abutment portion 412 are L-shaped. The mounting portion 411 is detachably mounted above the ferry roller conveyor 3. The abutment portion 412 is in contact with the side of the ferry roller conveyor 3. The actuating wheel 42 is rotatably connected to the abutment portion 412.
[0038] This application utilizes an L-shaped mounting portion 411 and abutment portion 412. The mounting portion 411 is detachably mounted above the shuttle roller conveyor 3, and the abutment portion 412 is fitted against the side of the shuttle roller conveyor 3. The actuating wheel 42 is rotatably connected to the abutment portion 412. The detachable mounting portion 411 above the shuttle roller conveyor 3 provides sufficient space for the operator, making operation more convenient and labor-saving. The L-shaped mounting portion 411 and abutment portion 412, with the abutment portion 412 fitting against the side of the shuttle roller conveyor 3, improves the stability and firmness between the mounting base 41 and the shuttle roller conveyor 3, reduces wear on the mounting base 41, and improves the smoothness of the rotation of the drive stop 2.
[0039] Please see Figure 4 and Figure 6 In some embodiments, the passive stop device of the parallel conveyor roller 1 for radioactive waste bins in nuclear power plants also includes a brake 7 installed on the parallel conveyor roller 1 to limit the swing amplitude of the stop 2.
[0040] This application utilizes a brake 7 installed on the parallel conveyor roller 1 to limit the swing amplitude of the stop 2. After the actuating wheel 42 separates from the counterweight 23, the brake 7 can promptly limit the stop 2, preventing it from swaying left and right around the axis of the rotating part 22. This would affect the next forward rotation of the counterweight 23 by the actuating wheel 42 and the blocking effect of the limiting part 21 on the radioactive waste container 8, thus improving the stability of each contact or separation between the actuating wheel 42 and the counterweight 23, thereby increasing the blocking efficiency and reducing the failure rate.
[0041] Please see Figure 4 and Figure 6 In some embodiments, the braking element 7 is a torsion spring disposed between the rotating part 22 and the parallel conveyor roller 1, or a magnetic element that is magnetically attracted and limited at the bottom end of the stop element 2.
[0042] This application uses a torsion spring, which is a braking element 7, located between the rotating part 22 and the parallel conveyor roller 1. The spring force of the torsion spring limits the rotating part 22. When the counterweight part 23 wants to rotate in the opposite direction at the lowest point, the spring force of the torsion spring will limit the counterweight part 23, so that the counterweight part 23 remains in a stable vertical state after separating from the actuating wheel 42. This prepares for the next time the actuating wheel 42 drives the counterweight part 23 to rotate forward and rise, avoiding jamming and improving smoothness.
[0043] Similarly, when the brake component 7 is a magnetically attracted component that magnetically limits the bottom of the stop component 2, after the counterweight 23 is separated from the actuating wheel 42, the magnetically attracted component can limit the counterweight 23 to the lowest point through magnetic force, preparing for the next actuating wheel 42 to drive the counterweight 23 to rotate forward and rise, avoiding jamming, improving smoothness, and facilitating maintenance, making installation more convenient and labor-saving.
[0044] Please see Figures 1 to 8 In some embodiments, the stop 2 is a polygonal plate structure, and the drive 4 is a cylinder or polyhedron.
[0045] This application utilizes a polygonal plate-like structure for the stop member 2 and a cylindrical or polyhedral structure for the drive member 4. The plate-like structure of the stop member 2 ensures that the side closest to the parallel conveyor roller 1 remains flat, reducing interference during the rotation of the stop member 2 and improving the smoothness of its rotation. The polygonal structure of the stop member 2 allows for an increase in the shielding area of the limiting part 21, thereby improving the blocking effect on the radioactive waste container 8, depending on the actual usage environment. The cylindrical or polyhedral drive member 4 can withstand greater resistance, is less prone to deformation, and extends its service life. The polyhedral drive member 4 is easier to manufacture, saving manufacturing costs, and is easier to install, reducing labor intensity.
[0046] 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 passive stop device for a radioactive waste cask transport system of a nuclear power plant, characterized in that, include: A stop (2) installed on the parallel conveyor roller (1) and at least one drive (4) installed on the ferry roller (3), wherein the stop (2) and the drive (4) cooperating therewith are both disposed between the parallel conveyor roller (1) and the ferry roller (3); During the process of the ferry roller conveyor (3) connecting to the parallel conveyor roller conveyor (1), the driving member (4) pushes the stop member (2) at the end of the parallel conveyor roller conveyor (1) to rotate in the forward direction until the highest point of the stop member (2) is lower than the highest point of the roller of the parallel conveyor roller conveyor (1). When the ferry roller conveyor (3) separates from the parallel conveyor roller conveyor (1), the ferry roller conveyor (3) drives the drive member (4) to separate from the stop member (2). The stop member (2) rotates in the opposite direction under its own gravity, so that the highest point of the stop member (2) is higher than the highest point of the roller of the parallel conveyor roller conveyor (1).
2. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 1, characterized in that The stop member (2) includes a limiting part (21), a rotating part (22) and a counterweight part (23). The stop member (2) is rotatably connected to the end of the parallel conveyor roller (1) through the rotating part (22). The limiting part (21) is located at one end of the rotating part (22). The counterweight part (23) is located at the other end of the rotating part (22) and is in contact with or separate from the driving member (4). The weight of the counterweight part (23) is greater than the weight of the limiting part (21). In the free state, the highest point of the limiting part (21) is higher than the highest point of the roller of the parallel conveyor roller (1).
3. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 2, characterized in that During the process of the drive member (4) contacting or separating from the counterweight (23), the bottom end of the counterweight (23) is always lower than the rotation axis of the rotating part (22).
4. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 2, characterized in that The passive stop device for the nuclear power plant radioactive waste container conveying system also includes a counterweight (5) installed on the stop (2), the counterweight (5) being located on the side of the counterweight (23) away from the drive (4).
5. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 4, characterized in that The limiting part (21) is provided with a buffer pad (6) on the side facing the parallel conveyor roller (1). The weight of the buffer pad (6) and the limiting part (21) is less than the weight of the counterweight part (23) and the counterweight (5).
6. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 2, characterized in that The drive component (4) includes a mounting base (41) and a deflector wheel (42). The mounting base (41) is detachably mounted on the ferry roller conveyor (3). The deflector wheel (42) is rotatably connected to the mounting base (41) and is in contact with or separate from the counterweight (23).
7. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 6, characterized in that The mounting base (41) includes a mounting part (411) and an abutment part (412). The mounting part (411) and the abutment part (412) are L-shaped. The mounting part (411) is detachably mounted above the ferry roller conveyor (3). The abutment part (412) is in contact with the side of the ferry roller conveyor (3). The actuating wheel (42) is rotatably connected to the abutment part (412).
8. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 2, characterized in that The passive stop device of the parallel conveyor roller (1) for radioactive waste bins in the nuclear power plant also includes a brake (7) installed on the parallel conveyor roller (1) to limit the swing amplitude of the stop (2).
9. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 8, characterized in that The braking component (7) is a torsion spring disposed between the rotating part (22) and the parallel conveyor roller (1), or a magnetic suction component that magnetically attracts and limits the bottom end of the stop component (2).
10. Passive stop device for a radioactive waste barrel transport system of a nuclear power plant according to claim 1, characterized in that The stop (2) is a polygonal plate structure, and the drive (4) is a cylinder or polyhedron.