Irradiation system

Abstract

An embodiment of the present invention discloses an irradiation system. The irradiation system comprises: an irradiation device for forming an irradiation zone for irradiating an object to be irradiated; a beam transfer system for transporting the object to be irradiated to the irradiation zone; wherein the irradiation device comprises a first accelerator and a second accelerator symmetrically arranged on both sides of the beam transfer system. The irradiation system is used to sterilize the object to be irradiated, thereby solving the problem of chemical agent residues existing in sterilization using chemical agents.

Description

Technical Field

[0001] The invention relates to the field of radiation treatment, and in particular to an radiation system. Background Art

[0002] With the globalization of economic trade, a large number of international activities have made the cross-border spread of pests a global problem that is becoming increasingly serious.

[0003] When it comes to the disinfection and sterilization of cold chain food, it is necessary to ensure that the viruses that may be carried by the inner and outer packaging of the food are thoroughly and effectively sterilized. Therefore, three aspects need to be controlled: first, the sterilization is complete and thorough, especially in a low temperature environment, which can effectively kill the virus; second, the sterilization method is simple to operate; third, safety and hygiene. The safety of cold chain food is of vital importance. At present, in order to solve the problem of virus sterilization that may exist on cold chain packaging boxes or frozen products, the existing technology often uses chemical agents for sterilization.

[0004] However, the use of chemical agents for sterilization may result in the problem of chemical residues, which in turn may contaminate food. Summary of the invention

[0005] An embodiment of the present invention provides an irradiation system.

[0006] An irradiation system according to an embodiment of the present invention comprises: an irradiation device for forming an irradiation zone for irradiating an object to be irradiated; and a beam transfer system for transporting the object to be irradiated to the irradiation zone; wherein the irradiation device comprises a first accelerator and a second accelerator symmetrically arranged on both sides of the beam transfer section.

[0007] Additional aspects and advantages of the embodiments of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0009] Figure 1 It is a structural schematic diagram of an irradiation system according to an embodiment of the present invention.

[0010] Figure 2 It is a structural schematic diagram of the pre-beam transport section of the irradiation system according to an embodiment of the present invention.

[0011] Figure 3 It is a structural schematic diagram of the post-beam transport section of the irradiation system according to an embodiment of the present invention.

[0012] Figure 4It is a schematic structural diagram of the under-beam transport section of the irradiation system according to an embodiment of the present invention.

[0013] Figure 5 It is a schematic structural diagram of an irradiation system according to another embodiment of the present invention.

[0014] Description of main component symbols:

[0015] 10. Irradiation system;

[0016] 100, irradiation device; 110, first accelerator; 120, second accelerator;

[0017] 200, under-beam transmission system; 210, loading section; 220, discharging section;

[0018] 230, pre-beam transport section; 231, first pre-beam transport section; 232, second pre-beam transport section; 233, third pre-beam transport section;

[0019] 240, transport section under the bundle; 241, transport section under the first bundle; 242, transport section under the second bundle; 243, transport section under the third bundle; 244, transport section under the fourth bundle;

[0020] 250, first steering structure; 260, second steering structure; 270, third steering structure; 280, fourth steering structure;

[0021] 290, transport section after the first bundle; 291, transport section after the first bundle; 292, transport section after the second bundle; 293, transport section after the third bundle;

[0022] 300, pre-processing device; 400, flipping device

[0023] 20. Irradiated objects. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In order to block the virus from spreading along the cold chain, the irradiation system of the present invention can be used to irradiate and sterilize the cold chain packaging box. The irradiation system 10 uses the characteristics of strong penetration of electron beam sterilization, uniform and thorough sterilization, and fast processing speed to irradiate and sterilize the irradiated object 20. In addition, no chemical agents will remain when the irradiation system 10 processes sealed packaged items. The following embodiments illustrate the irradiation system 10 of the present invention using the irradiated object 20 as a cold chain packaging box as an example, but the protection scope of the present invention is not limited. The irradiated object 20 can be an object of any shape. For example, three-dimensional shapes such as spheres, hexahedrons, and tetrahedrons.

[0026] See also Figures 1 to 5 The irradiation system 10 includes an irradiation device 100 and a beam transmission system 200 .

[0027] The irradiation device 100 is used to form an irradiation zone for irradiating the object 20. The irradiation device 100 can emit electron beams to sterilize the object 20 by irradiation.

[0028] The under-beam transport system 200 is used to transport the irradiated object 20 to the irradiation area. For example, the under-beam transport system 200 may use transport rollers or transport belts to transport the irradiated object 20.

[0029] Figure 5 1 is a schematic diagram of the structure of an irradiation system 10 according to another embodiment of the present invention. The irradiation device 100 includes a first accelerator 110 and a second accelerator 120 symmetrically arranged on both sides of a beam transmission system 200. The first accelerator 110 and the second accelerator 120 are arranged above the irradiated object 20 so that the electron beams emitted by the two accelerators just irradiate the three sides of the irradiated object 20, which can be achieved by installing magnets outside the scanning boxes of the first accelerator 110 and the second accelerator 120 and supplying electricity to the magnets.

[0030] Figure 1 is a schematic structural diagram of an irradiation system 10 according to an embodiment of the present invention. Figure 1 The beam transmission system 200 includes a loading section 210 and a discharging section 220 .

[0031] See also Figure 1 The loading section 210 is provided with a pretreatment device 300 to pretreatment the irradiated object 20 and transport the irradiated object 20 to the irradiation area. The pretreatment device 300 is used to pretreatment the irradiated object 20 that is about to enter the irradiation area, thereby preventing the virus that may remain on the irradiated object 20 from cross infection in the irradiation system 10.

[0032] See also Figure 1The discharge section 220 is located downstream of the loading section 210 to transport the irradiated object 20 away from the irradiation area. The discharge section 220 transports the irradiated object 20 away from the irradiation area to separate it from the irradiated object 20 that has not been irradiated, so as to avoid re-infection caused by mixing the irradiated and unirradiated objects together.

[0033] See also Figure 2 The under-beam transmission system 200 includes a pre-beam transport section 230. The input end of the pre-beam transport section 230 is connected to the output end of the loading section 210.

[0034] Figure 2 2 is a schematic structural diagram of the pre-beam transport section 230 of the irradiation system 10 according to an embodiment of the present invention. Figure 1 and Figure 2 The pre-beam transport section 230 includes a first pre-beam transport section 231 , a second pre-beam transport section 232 and a third pre-beam transport section 233 .

[0035] See also Figure 1 , the input end of the first pre-beam transport section 231 is connected to the output end of the loading section 210. The input end of the second pre-beam transport section 232 is connected to the output end of the first pre-beam transport section 231. The input end of the third pre-beam transport section 233 is connected to the output end of the second pre-beam transport section 232. That is, along the transport route of the irradiated object 20, the loading section 210, the first pre-beam transport section 231, the second pre-beam transport section 232 and the third pre-beam transport section 233 are connected in sequence, and the irradiated object 20 is transported in the loading section 210, the first pre-beam transport section 231, the second pre-beam transport section 232 and the third pre-beam transport section 233 in sequence.

[0036] See also Figure 2 The transport direction of the first pre-bundle transport section 231 is perpendicular to the transport direction of the loading section 210. The transport direction of the second pre-bundle transport section 232 is perpendicular to the transport direction of the first pre-bundle transport section 231. The transport direction of the third pre-bundle transport section 233 is perpendicular to the transport direction of the second pre-bundle transport section 232, and the transport direction of the third pre-bundle transport section 233 is opposite to the transport direction of the first pre-bundle transport section 231.

[0037] In some embodiments, there are turning structures between the first pre-beam transport section 231 and the second pre-beam transport section 232 and between the second pre-beam transport section 232 and the third pre-beam transport section 233 to transport the irradiated object 20 from the upstream transport section to the downstream transport section.

[0038] See also Figure 2 The front transport section 230 is a U-shaped structure.

[0039] See also Figure 1The under-beam transmission system 200 includes an under-beam transport section 240. The input end of the under-beam transport section 240 is connected to the output end of the pre-beam transport section 230.

[0040] See also Figure 4 The lower transport section 240 of the bundle is a U-shaped structure.

[0041] Figure 4 2 is a schematic structural diagram of the under-beam transport section 240 of the irradiation system 10 according to an embodiment of the present invention. Figure 1 and Figure 4 The lower bundle transport section 240 includes a first lower bundle transport section 241 , a second lower bundle transport section 242 , a third lower bundle transport section 243 and a fourth lower bundle transport section 244 .

[0042] See also Figure 1 , the input end of the first beam lower transport section 241 is connected to the output end of the third beam lower transport section 233. The input end of the second beam lower transport section 242 is connected to the output end of the first beam lower transport section 241. The input end of the third beam lower transport section 243 is connected to the output end of the second beam lower transport section 242. The input end of the fourth beam lower transport section 244 is connected to the output end of the third beam lower transport section 243. The output end of the fourth beam lower transport section 244 is connected to the output end of the third beam lower transport section 233 and the input end of the first beam lower transport section 241. In other words, the third beam lower transport section 233, the first beam lower transport section 241, the second beam lower transport section 242, the third beam lower transport section 243 and the fourth beam lower transport section 244 are connected in sequence. The first beam lower transport section 241, the second beam lower transport section 242, the third beam lower transport section 243 and the fourth beam lower transport section 244 are connected end to end.

[0043] See also Figure 1 The irradiation system 10 further includes a flipping device 400. The flipping device 400 is disposed on the fourth lower beam transport section 244 and is used to flip the irradiated object 20 by 180°.

[0044] See also Figure 5 The first accelerator 110 and the second accelerator 120 are symmetrically arranged on both sides of the second beam lower transport section 242 relative to a preset symmetry plane, and the preset symmetry plane is parallel to the transport direction of the second beam lower transport section 242.

[0045] See also Figure 1, the transport direction of the first bundle lower transport section 241 is perpendicular to the transport direction of the third bundle front transport section 233. The transport direction of the second bundle lower transport section 242 is perpendicular to the transport direction of the first bundle lower transport section 241. The transport direction of the third bundle lower transport section 243 is perpendicular to the transport direction of the second bundle lower transport section 242, and the transport direction of the third bundle lower transport section 243 is opposite to the transport direction of the first bundle lower transport section 241. The transport direction of the fourth bundle lower transport section 244 is perpendicular to the transport direction of the third bundle lower transport section 243, and the transport direction of the fourth bundle lower transport section 244 is opposite to the transport direction of the second bundle lower transport section 242.

[0046] See also Figure 1 The beam transmission system 200 also includes a first steering structure 250 .

[0047] The first steering structure 250 is docked with the output end of the third pre-beam transport section 233, the input end of the first under-beam transport section 241, and the output end of the fourth under-beam transport section 244, respectively, so as to transport the irradiated object 20 from the third pre-beam transport section 233 and the fourth under-beam transport section 244 to the first under-beam transport section 241. In other words, the irradiated object 20 is transported from the third pre-beam transport section 233 to the first steering structure 250 and then to the first under-beam transport section 241.

[0048] See also Figure 1 The beam transmission system 200 also includes a second steering structure 260.

[0049] The second steering structure 260 is docked with the output end of the first lower beam transport section 241 and the input end of the second lower beam transport section 242, respectively, so as to transport the irradiated object 20 from the first lower beam transport section 241 to the second lower beam transport section 242. In other words, the irradiated object 20 is transported from the first lower beam transport section 241 to the second steering structure 260 and then to the second lower beam transport section 242.

[0050] See also Figure 1 The beam transmission system 200 also includes a third steering structure 270.

[0051] The third steering structure 270 is docked with the output end of the second lower beam transport section 242 and the input end of the fourth lower beam transport section 244, respectively, so as to transport the irradiated object 20 from the second lower beam transport section 242 to the third lower beam transport section 243. In other words, the irradiated object 20 is transported from the second lower beam transport section 242 to the third steering structure 270 and then to the third lower beam transport section 243.

[0052] See also Figure 1 The beam transmission system 200 also includes a fourth steering structure 280.

[0053] The fourth steering structure 280 is docked with the output end of the third lower beam transport section 243 and the input end of the fourth lower beam transport section 244, respectively, so as to transport the irradiated object 20 from the third lower beam transport section 243 to the fourth lower beam transport section 244. In other words, the irradiated object 20 is transported from the third lower beam transport section 243 to the fourth steering structure 280 and then to the fourth lower beam transport section 244. Subsequently, the irradiated object 20 can be transported from the fourth lower beam transport section 244 to the first steering structure 250 and then to the first lower beam transport section 241.

[0054] In some embodiments, the irradiation system 10 further includes a judgment device. The judgment device is disposed downstream of the irradiation device 100 and upstream of the fourth steering structure 280 to judge the number of times the irradiated object 20 passes through the irradiation zone. Since the irradiated object 20 can be irradiated on three sides by passing through the irradiation zone on one side, in order to ensure that the six sides of the irradiated object 20 are irradiated, it is necessary to pass through the irradiation zone at least twice. Therefore, the judgment device can be used to judge the number of times the irradiated object 20 passes through the irradiation zone to judge whether the irradiated object 20 is transported from the third beam lower transport section 243 to the fourth beam lower transport section 244. In other words, when the number of times the irradiated object 20 passes through the irradiation zone is less than or equal to, the irradiated object 20 at this time only passes through the irradiation zone once, so three sides of the irradiated object 20 are irradiated and sterilized, and the other three irradiated surfaces need to be processed again. Since the accelerator in the sterilization system can irradiate three sides of the irradiated object 20 at the same time, if it is determined that the number of times the irradiated object 20 passes through the irradiation zone is less than or equal to 1, the irradiated object 20 may have only three sides irradiated through the irradiation zone or no side has been irradiated.

[0055] In some embodiments, when the number of times the irradiated object 20 passes through the irradiation zone is less than or equal to 1, the irradiated object 20 is first transported to the fourth lower beam transport section 244 via the fourth steering structure 280. After the irradiated object 20 is flipped 180° by the flipping device 400 of the fourth lower beam transport section 244, the irradiated object 20 is transported to the irradiation zone again via the first lower beam transport section 241.

[0056] When the object 20 to be irradiated reaches the turning device 400 , the unirradiated surface of the object 20 to be irradiated is parallel to the running direction of the object 20 .

[0057] In some embodiments, the irradiation system 10 further includes a coding device and an identification device.

[0058] The coding device is arranged downstream of the irradiation zone to mark the number of times the irradiated object 20 passes through the irradiation zone. The identification device is arranged downstream of the coding device and upstream of the judgment device to identify the number of times the irradiated object 20 passes through the irradiation zone. The coding device and the identification device can be used to obtain the number of times the irradiated object 20 passes through the irradiation zone so that the judgment device can make a judgment.

[0059] See also Figure 1 The under-beam transport system 200 includes a post-beam transport section 290. The input end of the post-beam transport section 290 is connected to the output end of the under-beam transport section 240.

[0060] Figure 3 2 is a schematic structural diagram of the post-beam transport section 290 of the irradiation system 10 according to an embodiment of the present invention. Figure 1 and Figure 3 The post-bundle transport section 290 includes a first post-bundle transport section 291 , a second post-bundle transport section 292 and a third post-bundle transport section 293 .

[0061] See also Figure 1 , the input end of the first bundle rear transport section 291 is connected to the output end of the third bundle lower transport section 243 and the input end of the fourth bundle lower transport section 244. The input end of the second bundle rear transport section 292 is connected to the output end of the first bundle rear transport section 291. The input end of the third bundle rear transport section 293 is connected to the output end of the second bundle rear transport section 292, and the output end of the third bundle rear transport section 293 is connected to the input end of the discharging section 220. In other words, the third bundle lower transport section 243, the first bundle rear transport section 291, the second bundle rear transport section 292, the third bundle rear transport section 293 and the discharging section 220 are connected in sequence.

[0062] See also Figure 1 The transport direction of the first bundle rear transport section 291 is opposite to the transport direction of the fourth bundle lower transport section 244. The transport direction of the second bundle rear transport section 292 is perpendicular to the transport direction of the first bundle rear transport section 291. The transport direction of the third bundle rear transport section 293 is perpendicular to the transport direction of the second bundle rear transport section 292, and the transport direction of the third bundle rear transport section 293 is opposite to the transport direction of the first bundle rear transport section 291.

[0063] See also Figure 4 The rear transport section 290 is a U-shaped structure.

[0064] In some embodiments, the irradiation system 10 also includes an inspection channel. During inspection, the inspection ladder is used to enter the inspection channel to complete the initial inspection of the equipment.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0068] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An irradiation system, characterized in that: include: An irradiation device (100) is used to form an irradiation zone for irradiating an object to be irradiated; A beam transport system (200) for transporting the irradiated object to the irradiation area; Wherein, the irradiation device (100) comprises a first accelerator (110) and a second accelerator (120) symmetrically arranged on both sides of the under-beam transmission system (200); The first accelerator (110) and the second accelerator (120) are arranged above the object to be irradiated, so that the electron beams emitted by the two accelerators just irradiate three surfaces of the object to be irradiated; The object to be irradiated is arranged to pass through the irradiation zone at least twice, so as to irradiate six sides of the object to be irradiated; The beam transmission system (200) comprises: A pre-bundle transport section (230), wherein the input end of the pre-bundle transport section (230) is connected to the output end of the loading section (210); a lower-beam transport section (240), wherein an input end of the lower-beam transport section (240) is connected to an output end of the pre-beam transport section (230); The pre-beam transport section (230) comprises: a first pre-beam transport section (231), wherein the input end of the first pre-beam transport section (231) is connected to the output end of the loading section (210); a second pre-beam transport section (232), wherein the input end of the second pre-beam transport section (232) is connected to the output end of the first pre-beam transport section (231); and a third pre-beam transport section (233), wherein the input end of the third pre-beam transport section (233) is connected to the output end of the second pre-beam transport section (232); The under-beam transport section (240) comprises: a first lower-beam transport section (241), wherein the input end of the first lower-beam transport section (241) is connected to the output end of the third front-beam transport section (233); a second lower-beam transport section (242), wherein the input end of the second lower-beam transport section (242) is connected to the output end of the first lower-beam transport section (241); a third lower-beam transport section (243), wherein the input end of the third lower-beam transport section (243) is connected to the output end of the second lower-beam transport section (242); a fourth lower-beam transport section (244), wherein the input end of the fourth lower-beam transport section (244) is connected to the output end of the third front-beam transport section (233) and the input end of the first lower-beam transport section (241); a first steering structure (250), the first steering structure (250) being docked with an output end of the third pre-beam transport section (233), an input end of the first under-beam transport section (241), and an output end of the fourth under-beam transport section (244), so as to transport the irradiated object from the third pre-beam transport section (233) and the fourth under-beam transport section (244) to the first under-beam transport section (241); a second steering structure (260), the second steering structure (260) being docked with the output end of the first lower beam transport section (241) and the input end of the second lower beam transport section (242) respectively, so as to transport the irradiated object from the first lower beam transport section (241) to the second lower beam transport section (242); a third steering structure (270), the third steering structure (270) being docked with the output end of the second lower beam transport section (242) and the input end of the fourth lower beam transport section (244) respectively, so as to transport the irradiated object from the second lower beam transport section (242) to the third lower beam transport section (243); a fourth steering structure (280), the fourth steering structure (280) being docked with the output end of the third lower beam transport section (243) and the input end of the fourth lower beam transport section (244) respectively, so as to transport the irradiated object from the third lower beam transport section (243) to the fourth lower beam transport section (244); The irradiation system further comprises: a turning device (400), the turning device (400) being arranged on the fourth beam lower transport section (244) and being used for turning the irradiated object by 180 degrees; a judging device, the judging device being arranged downstream of the irradiation device (100) and upstream of the fourth turning structure (280) to judge the number of times the irradiated object passes through the irradiation zone; When it is determined that the number of times the irradiated object passes through the irradiation zone is less than 1, each side of the irradiated object is not irradiated; when it is determined that the number of times the irradiated object passes through the irradiation zone is equal to 1, only three sides pass through the irradiation zone for irradiation.

2. The irradiation system according to claim 1, characterized in that: The beam transmission system (200) comprises: A loading section (210) is provided with a pre-treatment device (300) for pre-treating the irradiated object and transporting the irradiated object to the irradiation area; The material discharging section (220) is located downstream of the material loading section (210) to transport the irradiated object away from the irradiation area.

3. The irradiation system according to claim 1, characterized in that: The transport direction of the first front-bundle transport section (231) is perpendicular to the transport direction of the loading section (210); The transport direction of the second pre-bundle transport section (232) is perpendicular to the transport direction of the first pre-bundle transport section (231); The transport direction of the third pre-beam transport section (233) is perpendicular to the transport direction of the second pre-beam transport section (232), and the transport direction of the third pre-beam transport section (233) is opposite to the transport direction of the first pre-beam transport section (231).

4. The irradiation system according to claim 1, characterized in that: The front-beam transport section (230) is a U-shaped structure.

5. The irradiation system according to claim 1, characterized in that: The lower bundle transport section (240) is a U-shaped structure.

6. The irradiation system according to claim 1, characterized in that: The first accelerator (110) and the second accelerator (120) are symmetrically arranged on both sides of the second beam lower transport section (242) relative to a preset symmetry plane; The preset symmetry plane is parallel to the transport direction of the second bundle lower transport section (242).

7. The irradiation system according to claim 1, characterized in that: The transport direction of the first bundle lower transport section (241) is perpendicular to the transport direction of the third bundle front transport section (233); The transport direction of the second bundle lower transport section (242) is perpendicular to the transport direction of the first bundle lower transport section (241); The transport direction of the third lower bundle transport section (243) is perpendicular to the transport direction of the second lower bundle transport section (242), and the transport direction of the third lower bundle transport section (243) is opposite to the transport direction of the first lower bundle transport section (241); The transport direction of the fourth lower beam transport section (244) is perpendicular to the transport direction of the third lower beam transport section (243), and the transport direction of the fourth lower beam transport section (244) is opposite to the transport direction of the second lower beam transport section (242).

8. The irradiation system according to claim 1, characterized in that: The irradiation system further comprises: A coding device, disposed downstream of the irradiation zone, for marking the number of times the irradiated object passes through the irradiation zone; The identification device is arranged downstream of the coding device and upstream of the judging device to identify the number of times the irradiated object passes through the irradiation area.

9. The irradiation system according to claim 1, characterized in that: The beam transmission system (200) comprises: A post-bundle transport section (290), wherein the input end of the post-bundle transport section (290) is connected to the output end of the under-bundle transport section (240).

10. The irradiation system according to claim 9, characterized in that: The post-bundle transport section (290) comprises: A first post-bundle transport section (291), wherein an input end of the first post-bundle transport section (291) is connected to an output end of the third lower-bundle transport section (243) and an input end of the fourth lower-bundle transport section (244); A second post-bundle transport section (292), wherein an input end of the second post-bundle transport section (292) is connected to an output end of the first post-bundle transport section (291); A third post-bundle transport section (293), wherein the input end of the third post-bundle transport section (293) is connected to the output end of the second post-bundle transport section (292), and the output end of the third post-bundle transport section (293) is connected to the input end of the discharge section (220).

11. The irradiation system according to claim 10, characterized in that: The transport direction of the first bundle rear transport section (291) is opposite to the transport direction of the fourth bundle lower transport section (244); The transport direction of the second post-bundle transport section (292) is perpendicular to the transport direction of the first post-bundle transport section (291); The transport direction of the third post-bundle transport section (293) is perpendicular to the transport direction of the second post-bundle transport section (292), and the transport direction of the third post-bundle transport section (293) is opposite to the transport direction of the first post-bundle transport section (291).

12. The irradiation system according to claim 9, characterized in that The post-bundle transport section (290) is a U-shaped structure.

Images