Radiation disinfection device

Abstract

The invention relates to the technical field of disinfection equipment, in particular to a radiation disinfection device which can generate a dynamic scanning effect by utilizing a speed difference, has a bottom radiation reflection enhancing function and can effectively solve the problem of penetration of thick and large objects, the radiation disinfection device comprises an isolation space defined by a concrete wall, and an opening communicated with the isolation space is formed in the concrete wall; an opening is formed in the isolation space, a partition wall is arranged at the opening and divides the opening into an inlet and an outlet, island walls are arranged in the isolation space, a conveying channel is formed in the isolation space through the island walls, an irradiation mechanism is arranged in the conveying channel, and conveying mechanisms for conveying articles are arranged at the inlet, the conveying channel and the outlet; the conveying mechanism comprises a plurality of conveying units which are sequentially connected in the longitudinal direction to form closed conveying. Each conveying unit comprises a conveying frame, a first driving motor, a second driving motor, a main driving roller, an auxiliary driving roller, a main driven roller, an auxiliary driven roller, a plurality of supporting rollers, a first conveying belt and two second conveying belts.

Description

Technical Field

[0001] This invention relates to the field of disinfection equipment technology, and in particular to a radiation disinfection device. Background Technology

[0002] Irradiation sterilization utilizes high-energy rays generated by ionizing radiation to destroy the DNA structure of microorganisms, and is widely used in the sterilization of medical devices, food, and pharmaceuticals. Radiations used for sterilization include electron beams, X-rays, and gamma rays. These can all control microbial growth or kill microorganisms through specific methods. Food or other items requiring sterilization can be conveyed through a transport mechanism into an isolated space containing a radiation source for irradiation sterilization.

[0003] Traditional conveyor belts are mostly made of solid rubber or plastic. When the radiation source shines from above, the bottom surface of the item is in close contact with the conveyor belt, causing the radiation to be blocked or absorbed, making it difficult to penetrate to the bottom of the item. At the same time, for special items with high density or thickness, radiation from top to bottom often cannot penetrate the entire object, resulting in insufficient sterilization dose inside the item or on the bottom surface, creating a disinfection blind spot, which makes disinfection incomplete and reduces the disinfection effect. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention provides a radiation disinfection device that can generate a dynamic scanning effect by utilizing speed difference, has bottom radiation reflection enhancement function, and can effectively solve the problem of penetration of thick and large items.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A radiation disinfection device includes an isolation space enclosed by a concrete wall. The concrete wall has an opening communicating with the isolation space. A partition wall is provided at the opening to divide the opening into an inlet and an outlet. At least two openable lead plate doors are provided at both the inlet and the outlet. An island wall is provided inside the isolation space to form a conveying channel. An irradiation mechanism is provided in the conveying channel. Conveying mechanisms for conveying items are provided at the inlet, the conveying channel, and the outlet. The direction of the conveying mechanism is defined as the longitudinal direction, and the direction of the conveying mechanism is defined as the transverse direction. The conveying mechanism includes multiple conveying units connected sequentially along the longitudinal direction to form a closed conveying system. Each conveying unit includes a conveying frame, a first drive motor, a second drive motor, a main drive roller, an auxiliary drive roller, a main driven roller, an auxiliary driven roller, multiple support rollers, a first conveyor belt, and two second conveyor belts. The main drive roller and the main driven roller are rotatably mounted at both ends of the longitudinal direction of the conveying frame. Each main drive roller and the main driven roller has a first transmission area located at the center of the axial direction and a second transmission area located on both sides of the axial direction. The first drive motor is connected to the main drive roller. The auxiliary drive roller and the auxiliary driven roller are rotatably mounted on the conveying frame and located between the main drive roller and the main driven roller. The second drive motor is connected to the auxiliary drive roller. Gears are fitted on the circumferential surfaces of each auxiliary drive roller and the auxiliary driven roller. Each support roller is rotatably mounted on the conveying frame and located... Between the auxiliary drive roller and the auxiliary driven roller, the first conveyor belt is wound around the first transmission area of ​​the main drive roller and the main driven roller, and the inner surface of the first conveyor belt is provided with a flexible rack that meshes with a gear. The first conveyor belt includes a flexible support net distributed on the upper side, a rigid support layer distributed on the lower side, and a connecting part connecting the flexible support net and the rigid support layer. The connecting part is distributed in the transverse middle of the flexible support net, so that belt channels are formed on both transverse sides between the flexible support net and the rigid support layer. The flexible support net has mesh holes. The two second conveyor belts are respectively wound around the two second transmission areas of the main drive roller and the main driven roller, and the transverse inner ends of the two second conveyor belts are respectively embedded in the belt channels. The surface of the second conveyor belt has a radial reflective layer. The ratio of the conveying speed of the first conveyor belt to the conveying speed of the second conveyor belt is 1:1.05 to 1.12. The main drive roller and the main driven roller each include a first intermediate shaft, a first bearing, a first roller body, and two second roller bodies. The first roller body is sleeved on the axial middle part of the first intermediate shaft through the first bearing, and forms a first transmission zone through the first roller body. The two second roller bodies are fixedly sleeved on both ends of the first intermediate shaft, and form a second transmission zone through the second roller bodies. The outer diameter of the second roller body is larger than the outer diameter of the first roller body.

[0006] Furthermore, the rigid support layer includes a plurality of support plates arranged side by side along the longitudinal direction, with adjacent support plates hinged by a pin. The outer surface of the support plate is covered with a plastic slider. The flexible rack is disposed on the inner surface of the support plate. Each support plate has a longitudinally distributed limiting protrusion on its inner surface and on both sides of the flexible rack. The first roller body is recessed with an annular groove that matches the limiting protrusion.

[0007] Furthermore, a cooling air duct is provided through the limiting protrusion, and each of the limiting protrusions has a notch at both ends in the longitudinal direction to facilitate the entry of cooling air. A fan is provided on the inner side of the first conveyor belt to blow air toward the inner surface of the support plate.

[0008] Furthermore, the outer surface of the second conveyor belt is recessed with grooves for increasing the angle of radiation reflection.

[0009] Furthermore, the mesh has an asymmetrical prismatic structure, the long axis of the mesh is arranged along the longitudinal direction, and the transverse radiation transmittance of the mesh is not less than 85%.

[0010] Furthermore, the isolation space is equipped with a lead plate, which divides the isolation space into a first disinfection space and a second disinfection space. The opening includes a first opening and a second opening, which are respectively connected to the first disinfection space and the second disinfection space. The island wall includes a first island wall and a second island wall. The first island wall is located in the first disinfection space, forming a first conveying channel within the first disinfection space. The second island wall is located in the second disinfection space, forming a second conveying channel within the second disinfection space. The irradiation mechanism includes a first irradiation mechanism and a second irradiation mechanism. The first irradiation mechanism is located in the first conveying channel, and the second irradiation mechanism is located in the second conveying channel. The partition wall includes a first partition wall and a second partition wall. The first partition wall divides the first opening into a first inlet and a first outlet, and the second partition wall divides the second opening into a second inlet and a second outlet. The conveying mechanism includes a first conveying mechanism and a second conveying mechanism. The first conveying mechanism is located at the first inlet, the first conveying channel, and the first outlet, and the second conveying mechanism is located at the second inlet, the second conveying channel, and the second outlet.

[0011] Furthermore, the lead plate is detachably connected to the concrete wall.

[0012] Furthermore, the lead plate door includes a round pin, a sleeve rotatably fitted on the round pin, and a door panel connected to the sleeve. The door panel is provided with a clearance groove for the passage of the first conveying mechanism or the second conveying mechanism.

[0013] Furthermore, a control room is located outside the concrete wall and between the first and second openings.

[0014] By adopting the aforementioned technical solution, the beneficial effects of this invention are as follows: In use, the radiation disinfection device places items on a conveying mechanism and sequentially transports them into an isolation space. Then, the irradiation mechanism is activated, and the items on the conveying mechanism are irradiated and sterilized by the radiation generated by the irradiation mechanism. Furthermore, the conveying mechanism utilizes speed differences to generate a dynamic scanning effect, possesses bottom radiation reflection enhancement functionality, and effectively solves the problem of penetrating thick items. Specifically, a first conveyor belt is used to carry the items, and a second drive motor drives an auxiliary drive roller to rotate. The gears on the auxiliary drive roller mesh with a flexible rack on the inner surface of the first conveyor belt, and simultaneously, the main drive roller and the driven roller move the first conveyor belt... The tensioning effect enables the first conveyor belt to transport items, while the first drive motor drives the main drive roller to rotate, thereby driving two second conveyor belts with radiation reflective layers. The flexible support mesh of the first conveyor belt is perforated, and belt channels are formed on both sides of the flexible support mesh and the rigid support layer, thus forming a hollow structure in the middle. This allows the radiation rays passing through the items and the mesh of the first conveyor belt from above to reach the second conveyor belt below. The radiation reflective layers reflect these radiation rays upwards, allowing them to pass through the items from the bottom to the top. This bidirectional radiation mode of "top-down reflection" effectively solves the problem that special thick items are difficult to be penetrated by radiation rays, significantly improving the disinfection effect of the bottom and inside of the items. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a top view of the first conveying mechanism in Embodiment 1 of the present invention; Figure 3 This is a partial cross-sectional view of the main drive roller, the first conveyor belt, and the second conveyor belt in Embodiment 1 of the present invention; Figure 4 yes Figure 2 A magnified view of a section at point A in the middle; Figure 5 This is a front view schematic diagram of the first conveying mechanism in Embodiment 1 of the present invention; Figure 6 yes Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is a schematic diagram of the main drive roller in Embodiment 1 of the present invention; Figure 8 This is a cross-sectional view of the main drive roller in Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the lead plate door in Embodiment 1 of the present invention; Figure 10 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 11 This is a front view schematic diagram of the position adjustment mechanism in Embodiment 2 of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Concrete wall; 2. Isolation space; 3. Lead plate; 4. First island wall; 5. First conveying channel; 6. First irradiation mechanism; 7. First partition wall; 8. First conveying mechanism; 9. Second island wall; 10. Second conveying channel; 11. Second irradiation mechanism; 12. Second partition wall; 13. Second conveying mechanism; 14. Support plate; 15. Plastic slider; 16. Limiting protrusion; 17. Annular groove; 18. Cooling air duct; 19. Notch; 20. Fan; 21. First disinfection space; 22. Second disinfection space; 23. First opening; 24. Second opening; 30. Lead plate door; 31. Round pin; 32. Sleeve; 33. Door panel; 34. Leaving groove; 35. Control room; 300. Conveying unit; 302. Main drive roller; 303. Auxiliary drive roller; 304. Main driven roller; 305. Auxiliary driven roller; 306. Support roller; 307. First conveyor belt; 308. Second conveyor belt; 309. Gear; 310. Flexible rack; 317. Flexible support net; 318. Groove; 327. Rigid support layer; 337. Connecting part; 347. Belt channel; 357. Mesh; 401, First intermediate shaft; 402, First bearing; 403, First roller body; 404, Second roller body; 500, Position adjustment mechanism; 501, Driving roller; 502, Driven roller; 503, Flexible conveyor belt; 504, Idler roller; 505, Limiting guard plate; 506, Arc-shaped protrusion. Detailed Implementation

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0018] The embodiments of the present invention are as follows: Example 1:

[0019] refer to Figures 1 to 9 As shown, a radiation disinfection device includes an isolation space 2 enclosed by a concrete wall 1. The concrete wall 1 has an opening communicating with the isolation space 2. A partition wall is provided at the opening to divide the opening into an inlet and an outlet. Three openable lead plate doors 30 are provided at both the inlet and the outlet. An island wall is provided inside the isolation space to form a conveying channel. An irradiation mechanism is provided in the conveying channel. Conveying mechanisms for conveying items are provided at the inlet, the conveying channel, and the outlet. Specifically, the isolation space 2 is equipped with a lead plate 3, which divides the isolation space 2 into a first disinfection space 21 and a second disinfection space 22. The openings include a first opening 23 and a second opening 24, which are respectively connected to the first disinfection space 21 and the second disinfection space 22. The island walls include a first island wall 4 and a second island wall 9. The first island wall 4 is located within the first disinfection space 21, forming a first conveying channel 5 within the first disinfection space 21. The second island wall 9 is located within the second disinfection space 22, forming a second conveying channel 10 within the second disinfection space 22. The irradiation mechanism includes a first irradiation mechanism 6 and a second irradiation mechanism 11. The first irradiation mechanism 6 is located within the first conveying channel 5, and the second irradiation mechanism 11 is located within the second conveying channel 10. The partition wall includes a first partition wall 7 and a second partition wall 12. The first partition wall 7 divides the first opening 23 into a first inlet 231 and a first outlet 232, and the second partition wall 12 divides the second opening 24 into a second inlet 241 and a second outlet 242. The conveying mechanism includes a first conveying mechanism 8 and a second conveying mechanism 13. The first conveying mechanism 8 is located at the first inlet 231, the first conveying channel 5, and the first outlet 232, and the second conveying mechanism 13 is located at the second inlet 241, the second conveying channel 10, and the second outlet 242.

[0020] The longitudinal direction is defined as the direction along which the conveying mechanism extends, and the transverse direction is defined as the direction along which the width of the conveying mechanism extends. The conveying mechanism includes multiple conveying units 300 connected sequentially along the longitudinal direction to form a closed conveying system. Each conveying unit 300 includes a conveying frame, a first drive motor, a second drive motor, a main drive roller 302, an auxiliary drive roller 303, a main driven roller 304, an auxiliary driven roller 305, multiple support rollers 306, a first conveyor belt 307, and two second conveyor belts 308. The main drive roller 302 and the main driven roller 304 are rotatably mounted at both ends of the longitudinal direction of the conveying frame. Both the main drive roller 302 and the main driven roller 304 have a shaft located at the shaft. The first drive motor is connected to the main drive roller 302 in the first transmission zone in the middle and the second transmission zones located on both sides of the axial direction. The auxiliary drive roller 303 and the auxiliary driven roller 305 are rotatably mounted on the conveyor frame and located between the main drive roller 302 and the main driven roller 304. The second drive motor is connected to the auxiliary drive roller 303. Gears 309 are sleeved on the circumferential surfaces of the auxiliary drive roller 303 and the auxiliary driven roller 305. Each of the support rollers 306 is rotatably mounted on the conveyor frame and located between the auxiliary drive roller 303 and the auxiliary driven roller 305. Between 305, the first conveyor belt 307 is wound around the first transmission area of ​​the main drive roller 302 and the main driven roller 304, and the inner surface of the first conveyor belt 307 is provided with a flexible rack 310 that meshes with the gear 309. The first conveyor belt 307 includes a flexible support net 317 distributed on the upper side, a rigid support layer 327 distributed on the lower side, and a connecting part 337 connecting the flexible support net 317 and the rigid support layer 327. The connecting part 337 is distributed in the transverse middle of the flexible support net 317, so that the flexible support net 317 and the rigid support layer 327 are connected. Belt channels 347 are formed on both sides of the transverse direction between 7. The flexible support net 317 has mesh holes 357. The two second conveyor belts 308 are respectively wound around the two second transmission areas of the main drive roller 302 and the main driven roller 304. The transverse inner ends of the two second conveyor belts 308 are respectively embedded in the belt channels 347. The surface of the second conveyor belts 308 has a radiation reflective layer. The ratio of the conveying speed of the first conveyor belt 307 to the conveying speed of the second conveyor belt 308 is 1:1.05 to 1.12, preferably 1:1.08.

[0021] In use, this radiation sterilization device involves placing items on a conveyor mechanism and sequentially transporting them into the isolation space 2. The irradiation mechanism is then activated, irradiating the items on the conveyor mechanism with radiation to sterilize them. The conveyor mechanism utilizes speed differences to create a dynamic scanning effect, enhances bottom radiation reflection, and effectively solves the problem of thick items penetrating. Specifically, a first conveyor belt 307 carries the items, and a second drive motor drives an auxiliary drive roller 303 to rotate. The gear 309 on the auxiliary drive roller 303 meshes with a flexible rack 310 on the inner surface of the first conveyor belt 307. Simultaneously, the main drive roller 302 and the driven roller 304 tension the first conveyor belt 307, thus enabling the first conveyor belt 307 to transport the items. The first drive motor also drives the main drive roller 302 to rotate, thereby driving two second conveyor belts 308 with radiation reflective layers. The flexible support net 317 of the first conveyor belt 307 has mesh openings 357, and the flexible support net 317 and the rigid support layer 327 are positioned laterally... Both sides form belt channels 347, resulting in a hollow structure in the middle. This allows radiation rays passing through the items and the mesh 357 of the first conveyor belt 307 from above to reach the second conveyor belt 308 below. The radiation reflector layer reflects these rays upwards, allowing them to pass through the items from the bottom. This bidirectional irradiation mode of "top-down reflection" effectively solves the problem of radiation rays being difficult to penetrate particularly thick and large items, significantly improving the disinfection effect on the bottom and inside of the items. Furthermore, the speed difference between the first conveyor belt 307 and the second conveyor belt 308 creates a continuous relative displacement between the mesh 357 on the first conveyor belt 307 and the reflective surface of the second conveyor belt 308 below. This relative movement causes the light spot pattern irradiated on the bottom of the items to change continuously, avoiding static shadow areas caused by fixed meshes. This achieves dynamic scanning disinfection of the bottom surface of the items, greatly improving the uniformity of dose distribution. At the same time, the use of concrete walls 1, lead plate doors 30, and island walls forms a maze-like conveyor channel, ensuring continuous entry and exit of items while effectively preventing radiation leakage and ensuring a safe operating environment.

[0022] Specifically, both the main drive roller 302 and the main driven roller 304 include a first intermediate shaft 401, a first bearing 402, a first roller body 403, and two second roller bodies 404. The first roller body 403 is sleeved on the axial middle part of the first intermediate shaft 401 through the first bearing 402, forming a first transmission zone. The two second roller bodies 404 are fixedly sleeved on both axial ends of the first intermediate shaft 401, forming a second transmission zone. The outer diameter of the second roller body 404 is larger than the outer diameter of the first roller body 403. The first roller body 403 is rotatably mounted on the first intermediate shaft 401 through the first bearing 402. On shaft 401, the first roller 403 and the first intermediate shaft 401 rotate relative to each other, so that the first conveyor belt 307 wound on the first roller 403 only achieves tensioning function and does not affect the driving interference of the auxiliary drive roller 303 on the first conveyor belt 307. At the same time, the second roller 404 is fixedly sleeved on the first intermediate shaft 401. When the first intermediate shaft 401 rotates, it drives the second roller 404 to rotate synchronously, thereby driving the second conveyor belt 308 wound on the second roller 404 to move. This segmented roller design allows the three-layer conveying structure to be compactly integrated into the same drive end, saving valuable layout space in the isolation space.

[0023] Furthermore, the rigid support layer 327 includes a plurality of support plates 14 arranged side by side along the longitudinal direction. Adjacent support plates 14 are hinged together by a pin. The outer surface of the support plate 14 is covered with a plastic slider 15. The flexible rack 310 is disposed on the inner surface of the support plate 14. Each support plate 14 has a longitudinally distributed limiting protrusion 16 on its inner surface and on both sides of the flexible rack 310. The first roller body 403 is recessed with an annular groove 17 that matches the limiting protrusion 16. The use of hinged support plates 14 instead of integral rollers or solid belts not only retains the tensile strength and load-bearing capacity of chains, but also adapts to the bending radius of the drive roller, preventing rigid breakage. The plastic slider on the surface reduces friction noise and wear. Moreover, the limiting protrusion 16 on the inner side of the support plate 14 and the annular groove 17 on the drive roller are precisely matched to form a reliable axial limiting mechanism. This not only prevents the first conveyor belt 307 from lateral deviation when running at high speed or under uneven load, but also ensures that the "belt channel" in the middle of the first conveyor belt is always accurately aligned with the second conveyor belts on both sides, thus guaranteeing the accuracy of the reflection and radiation path.

[0024] Meanwhile, a cooling air duct 18 is provided through the limiting protrusion 16, and each of the limiting protrusions 16 has a notch 19 at both ends in the longitudinal direction to facilitate the entry of cooling air. The inner side of the first conveyor belt 307 is provided with a blower 20 that blows air toward the inner surface of the support plate 14. During the radiation disinfection process, high-energy rays will cause the conveyor belt material to heat up and accelerate aging. In addition, the relative sliding caused by the speed difference between the first conveyor belt 307 and the second conveyor belt 308 will generate temperature. The hollow cooling air duct 18 inside the limiting protrusion 16 is used as a heat dissipation channel. The blower 20 directly blows cold air into the support plate 14. The airflow forms convection through the notches at both ends, directly carrying away the heat generated by the rigid support layer 327 and the flexible rack 310. The blowing airflow can also blow away the dust and debris accumulated in the hinge gaps and rack, preventing debris from getting stuck and affecting the transmission accuracy. It plays an auxiliary cleaning role and is particularly suitable for medical disinfection scenarios with high cleanliness requirements.

[0025] Furthermore, the outer surface of the second conveyor belt 308 is recessed with a groove 318 for increasing the reflection angle of radiation rays. Traditional planar reflection may cause radiation rays to glide at a small angle to the bottom of the object, resulting in limited penetration depth. By setting the groove 318, the normal direction of the reflecting surface is changed, so that the incident radiation rays can be reflected and directed upwards to the bottom of the object at a more vertical angle. The groove 318 can also produce a certain diffuse reflection effect, causing the radiation rays to be refracted multiple times in the gaps at the bottom of the object, further increasing the probability of interaction between the radiation rays and the object, and increasing the absorbed dose in the hard-to-penetrate area.

[0026] Furthermore, the mesh 357 has an asymmetrical rhomboid structure, with its long axis arranged along the longitudinal direction. The transverse radiation transmittance of the mesh 357 is not less than 85%. The asymmetrical rhomboid design with the long axis arranged along the longitudinal direction means that the proportion of solid material in the transverse direction is minimized. This geometry minimizes the obstruction of radiation rays in the transverse direction, ensuring that the transverse radiation transmittance is not less than 85%. This allows most of the radiation rays to pass smoothly through the first conveyor belt 307 to reach the reflective layer below, providing a physical basis for "bidirectional penetration disinfection". The longitudinal long axis design maintains the tensile strength and structural continuity of the conveyor belt in the direction of travel, preventing items from getting stuck or the belt from tearing due to excessively large mesh openings, achieving a perfect balance between high transmittance and high mechanical strength.

[0027] In this embodiment, by setting lead plates 3 in the isolation space 2 enclosed by concrete walls 1, the entire space is divided into two independent first disinfection spaces 21 and second disinfection spaces 22, and each is equipped with its own conveying channel, irradiation mechanism and inlet / outlet structure. This realizes the integration of two sterilization production lines within an overall isolation structure. Compared with the traditional method of building two independent single kiln mechanisms, this significantly reduces the overall footprint of the equipment and the amount of civil engineering and shielding materials used, thereby effectively saving construction costs. At the same time, the parallel operation of the two kilns can improve sterilization efficiency and meet high production capacity requirements.

[0028] Furthermore, the lead plate 3 is detachably connected to the concrete wall 1. Specifically, the lead plate 3 and the concrete wall 1 are locked together by bolts, which facilitates the maintenance, replacement or upgrading of the internal irradiation mechanism or shielding structure in the later stage, improving the maintainability and flexibility of the equipment. Moreover, by disassembling the lead plate, the first conveying mechanism 8 and the second conveying mechanism 13 can be merged to form a long-stroke sterilization process. At the same time, when it is necessary to adjust the spatial layout or expand the functions, there is no need to damage the main concrete structure, further reducing the operation and maintenance costs and construction difficulty.

[0029] Meanwhile, the lead plate door 30 includes a round pin 31, a sleeve 32 rotatably fitted on the round pin 31, and a door plate 33 connected to the sleeve 32. The door plate 33 is provided with a clearance groove 34 for the passage of the first conveying mechanism 8 or the second conveying mechanism 13. This ensures that the lead plate door 30 has good radiation shielding performance when closed, and also allows the conveying mechanism to pass continuously through the clearance groove 34 without interference. The door plate 33 is opened and closed by rotating the sleeve 32 around the round pin 31. The structure is simple and the operation is reliable. The multiple doors form a "maze-like" passage, which effectively prevents radiation leakage from the inlet and outlet and improves operational safety.

[0030] Furthermore, a control room 35 is provided on the outside of the concrete wall 1 and between the first opening 23 and the second opening 24, so that operators can centrally monitor and control the operation status of the two sterilization lines in a safe area, reducing the frequency of personnel entering high-risk areas; at the same time, this location facilitates the layout of control lines and observation windows, optimizes the human-machine interaction layout, and improves the ease of operation and system integration. Example 2:

[0031] refer to Figure 10 and Figure 11As shown, in this embodiment, a position adjustment mechanism 500 is provided between two adjacent conveying units 300 and on the periphery of the irradiation mechanism. The position adjustment mechanism 500 includes a frame, a drive roller 501 and a driven roller 502 rotatably mounted on the frame, a flexible conveyor belt 503 wound around the drive roller 501 and the driven roller 502, a drive motor connected to the drive roller 501, multiple idler rollers 504 arranged sequentially along the conveying direction, and a limiting guard plate 505. The idler rollers 504 are located on the lower side of the conveying surface of the flexible conveyor belt 503, so that the flexible conveyor belt 503 forms an arc-shaped protrusion 506. The axial height of each idler roller 504 is distributed in a sinusoidal curve along the conveying direction. The arc-shaped protrusion 506 causes the flexible conveyor belt 503 supported on it to form an undulating waveform trajectory during travel. The amplitude of the 6-distribution is 10mm-50mm, preferably 20mm, and the wavelength corresponds to the spacing of 3-6 idlers 504, preferably 5. When the material passes through the arc-shaped protrusion 506 with the flexible conveyor belt 503, the shear force generated by the change of gravity component and curvature is sufficient to cause relative displacement and micro-rolling inside the material layer. The lower edge contour of the limiting guard plate 505 is parallel to the undulating waveform trajectory of the flexible conveyor belt 503 and maintains a preset gap to limit the lateral escape of the material during the rolling process, while allowing the material to move laterally in the lateral direction. The surface of the idler 504 is covered with a high friction coefficient elastic layer, and the distance between two adjacent idlers 504 is less than the chord length corresponding to the minimum curvature radius of the sine wave curve, so as to ensure that the flexible conveyor belt 503 does not detach from the roller during the undulation process.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A radiation sterilization device, characterized in that: The system includes an isolation space enclosed by a concrete wall, the concrete wall having an opening communicating with the isolation space, a partition wall at the opening dividing the opening into an inlet and an outlet, and at least two openable lead plate doors at both the inlet and outlet. An island wall is provided within the isolation space, forming a conveying channel within the isolation space. An irradiation mechanism is provided within the conveying channel. Conveying mechanisms for conveying items are provided at the inlet, conveying channel, and outlet. The direction of the conveying mechanism's conveying direction is defined as the longitudinal direction, and the direction of the conveying mechanism's width is defined as the transverse direction. The conveying mechanism includes multiple conveying units connected sequentially along the longitudinal direction to form a closed conveying system. Each conveying unit includes a conveying frame, a first drive motor, a second drive motor, a main drive roller, an auxiliary drive roller, a main driven roller, an auxiliary driven roller, multiple support rollers, a first conveyor belt, and two second conveyor belts. The main drive roller and the main driven roller are rotatably mounted at both ends of the longitudinal direction of the conveying frame. Each main drive roller and the main driven roller has a first transmission area located at the center of the axial direction and a second transmission area located on both sides of the axial direction. The first drive motor is connected to the main drive roller. The auxiliary drive roller and the auxiliary driven roller are rotatably mounted on the conveying frame and located between the main drive roller and the main driven roller. The second drive motor is connected to the auxiliary drive roller. Gears are fitted on the circumferential surfaces of each auxiliary drive roller and the auxiliary driven roller. Each support roller is rotatably mounted on the conveying frame and located... Between the auxiliary drive roller and the auxiliary driven roller, the first conveyor belt is wound around the first transmission area of ​​the main drive roller and the main driven roller, and the inner surface of the first conveyor belt is provided with a flexible rack that meshes with a gear. The first conveyor belt includes a flexible support net distributed on the upper side, a rigid support layer distributed on the lower side, and a connecting part connecting the flexible support net and the rigid support layer. The connecting part is distributed in the transverse middle of the flexible support net, so that belt channels are formed on both transverse sides between the flexible support net and the rigid support layer. The flexible support net has mesh holes. The two second conveyor belts are respectively wound around the two second transmission areas of the main drive roller and the main driven roller, and the transverse inner ends of the two second conveyor belts are respectively embedded in the belt channels. The surface of the second conveyor belt has a radial reflective layer. The ratio of the conveying speed of the first conveyor belt to the conveying speed of the second conveyor belt is 1:1.05 to 1.

12. The main drive roller and the main driven roller each include a first intermediate shaft, a first bearing, a first roller body, and two second roller bodies. The first roller body is sleeved on the axial middle part of the first intermediate shaft through the first bearing, and forms a first transmission zone through the first roller body. The two second roller bodies are fixedly sleeved on both ends of the first intermediate shaft, and form a second transmission zone through the second roller bodies. The outer diameter of the second roller body is larger than the outer diameter of the first roller body.

2. The radiation sterilization device according to claim 1, characterized in that: The rigid support layer includes multiple support plates arranged side by side along the longitudinal direction. Adjacent support plates are hinged together by a pin. The outer surface of the support plate is covered with a plastic slider. The flexible rack is disposed on the inner surface of the support plate. Each support plate has a longitudinally distributed limiting protrusion on its inner surface and on both sides of the flexible rack. The first roller body is recessed with an annular groove that matches the limiting protrusion.

3. The radiation sterilization device according to claim 2, characterized in that: The limiting protrusion is provided with a cooling air duct, and each of the limiting protrusions has a notch at both ends in the longitudinal direction to facilitate the entry of cooling air. The inner side of the first conveyor belt is provided with a fan that blows air toward the inner surface of the support plate.

4. The radiation sterilization device according to claim 3, characterized in that: The outer surface of the second conveyor belt is recessed with grooves to increase the angle of radiation reflection.

5. The radiation sterilization device according to claim 4, characterized in that: The mesh has an asymmetrical prismatic structure, with the long axis of the mesh arranged along the longitudinal direction, and the transverse radiation transmittance of the mesh is not less than 85%.

6. The radiation sterilization device according to any one of claims 1 to 5, characterized in that: The isolation space is equipped with a lead plate, which divides the isolation space into a first disinfection space and a second disinfection space. The opening includes a first opening and a second opening, which are respectively connected to the first disinfection space and the second disinfection space. The island wall includes a first island wall and a second island wall. The first island wall is located in the first disinfection space, forming a first conveying channel within the first disinfection space. The second island wall is located in the second disinfection space, forming a second conveying channel within the second disinfection space. The irradiation mechanism includes a first irradiation mechanism and a second irradiation mechanism. The first irradiation mechanism is located in the first conveying channel, and the second irradiation mechanism is located in the second conveying channel. The partition wall includes a first partition wall and a second partition wall. The first partition wall divides the first opening into a first inlet and a first outlet, and the second partition wall divides the second opening into a second inlet and a second outlet. The conveying mechanism includes a first conveying mechanism and a second conveying mechanism. The first conveying mechanism is located at the first inlet, the first conveying channel, and the first outlet, and the second conveying mechanism is located at the second inlet, the second conveying channel, and the second outlet.

7. The radiation sterilization device according to claim 6, characterized in that: The lead plate is detachably connected to the concrete wall.

8. The radiation sterilization device according to claim 7, characterized in that: The lead plate door includes a round pin, a sleeve rotatably fitted on the round pin, and a door panel connected to the sleeve. The door panel is provided with a clearance groove for the passage of a first conveying mechanism or a second conveying mechanism.

9. The radiation sterilization device according to claim 8, characterized in that: A control room is located outside the concrete wall, between the first and second openings.

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