A shielding device suitable for high-dose electron beam irradiation

Abstract

A shielding device suitable for high-dose electron beam irradiation comprises a closed shielding shell, a cavity is arranged in the shielding shell, a central partition and a partition plate made of shielding material are arranged on the inner wall of the shielding shell, the central partition plate divides the cavity into an irradiation chamber and a feeding chamber, and the partition plate divides the feeding chamber into an inlet chamber and an outlet chamber; an inlet channel connected to the inlet chamber and an outlet chamber are arranged on the outer surface of the shielding shell, a first inlet channel and a second inlet channel are arranged on the central partition plate, and a first guide roller is arranged in the inlet chamber and the outlet chamber; an electron beam accelerator, a beam absorption plate located on the left side of the electron accelerator, a beam shielding plate located on the left side of the beam absorption plate, and two second guide rollers are arranged in the irradiation chamber, a coil between the two second guide rollers passes between the electron accelerator and the beam absorption plate, and the first inlet channel and the second inlet channel are both located on the left side of the beam shielding plate. The present invention can maintain the gas environment required for electron beam irradiation and ensure the shielding effect.

Description

Technical Field

[0001] The invention relates to the technical field of electron beam irradiation, in particular to a shielding device suitable for high-dose electron beam irradiation. Background Art

[0002] During the electron beam irradiation process, when the electron beam hits the irradiated object or the inner wall of the channel, x-rays that are harmful to the human body will be generated in the irradiation area. X-rays are ionizing radiation. Unlike non-ionizing radiation such as visible light and ultraviolet light (UV), they interact with matter in a complex manner and have the laws of reflection and transmission at the interface. On a production line that can produce continuously, how to shield the x-rays generated in the irradiation area to a safe level is the primary safety issue in production line design.

[0003] For example, the electron beam irradiation device described in CN1809496A and CN107971191A achieves the radiation level that meets the national requirements by making the x-rays generated by the irradiation surface reflect twice before being emitted from the input and output materials. However, for high-speed electron beam irradiation applications, higher beam intensity and irradiation dose are usually required. After two reflections, there will still be a certain intensity of radiation in the input and output materials. At the same time, the narrow channel is not conducive to maintaining a low oxygen concentration during electron beam irradiation at high speed. It is necessary to increase the channel length or increase the amount of protective gas, resulting in an increase in cost. Summary of the invention

[0004] The present invention provides a shielding device suitable for high-dose electron beam irradiation, which can maintain the gas environment required for electron beam irradiation and ensure the shielding effect for a coiled material running at a high speed.

[0005] An embodiment of the present invention provides a shielding device suitable for high-dose electron beam irradiation, comprising a closed shielding shell, wherein a cavity is provided in the shielding shell, and an inner wall of the shielding shell is provided with a central partition and a partition plate made of shielding material, wherein the central partition divides the cavity into an irradiation chamber and a feed chamber, wherein the feed chamber is located on the left side of the irradiation chamber, and the partition plate divides the feed chamber into an inlet chamber and an outlet chamber; an inlet channel connected to the inlet chamber and an outlet chamber are provided on the outer surface of the shielding shell, a first inlet chamber connected to the irradiation chamber and the inlet chamber respectively, and a second inlet chamber connected to the irradiation chamber and the outlet chamber respectively, and a first guide roller is provided in both the inlet chamber and the outlet chamber; the irradiation chamber is provided with an electron beam accelerator, a guide roller located on the left side of the electron accelerator, and a guide roller disposed on the inner wall of the shielding shell. The invention relates to a beam absorbing plate on the side, a beam shielding plate located on the left side of the beam absorbing plate, and two second guide rollers for tightening the coil, the coil between the two second guide rollers passes through between the electron accelerator and the beam absorbing plate, the first feed channel and the second feed channel are both located on the left side of the beam shielding plate, and the openings of the first feed channel and the second feed channel in the irradiation chamber are located within the projection range of the beam shielding plate along the irradiation direction; the first feed channel and the second feed channel are both inclined relative to the central partition plate, the feed shielding plate for blocking the rays emitted from the first feed channel from being emitted to the feed channel is provided in the feed chamber, and the discharge shielding plate for blocking the rays emitted from the second feed channel from being emitted to the discharge channel is provided in the discharge chamber; the feed chamber, the irradiation chamber and the discharge chamber are all provided with inert gas filling pipes.

[0006] Preferably, the shielding shell includes a right shielding sleeve, a left shielding sleeve and a middle shielding sleeve located between the right shielding sleeve and the left shielding sleeve, the right shielding sleeve and the left shielding sleeve are both detachably connected to the middle shielding sleeve, the central partition is fixed on the inner wall of the middle shielding sleeve, and the feed channel and the discharge channel are both arranged on the left shielding sleeve.

[0007] Preferably, the end surface of the right shielding sleeve close to the middle shielding sleeve is provided with a left slot, the end surface of the left shielding sleeve close to the middle shielding sleeve is provided with a right slot, and both ends of the middle shielding sleeve are respectively inserted into the left slot and the right slot.

[0008] Preferably, a guide rail is further provided below the shielding shell, rollers movable along the guide rail are further provided at the bottom of the right shielding sleeve and the left shielding sleeve, and a fixing block fixed on the guide rail is provided at the bottom of the middle shielding sleeve.

[0009] Preferably, the partition plate is fixed on the left shielding sleeve, and a convex plate is provided on the surface of the central partition plate close to the left shielding sleeve, and a slot is provided on the convex plate, and the partition plate is detachably inserted in the slot.

[0010] Preferably, radiation-resistant sealing strips are attached to the left slot of the right shielding sleeve, the right slot of the left shielding sleeve, and the slot of the convex plate.

[0011] Preferably, the feed shielding plate and the discharge shielding plate are both located on the inner wall of the shielding shell, the feed shielding plate is located between the feed channel and the partition plate, the discharge shielding plate is located between the discharge channel and the partition plate, a feed shielding slot is formed between the feed shielding plate, the shielding shell and the partition plate, a discharge shielding slot is formed between the discharge shielding plate, the shielding shell and the partition plate, the first feed channel faces the feed shielding slot, and the second feed channel faces the discharge shielding slot.

[0012] Preferably, the feed shielding plate and the discharge shielding plate are both arranged on the partition plate, the opening of the feed channel in the shielding shell is located within the projection range of the feed shielding plate along the irradiation direction, the opening of the discharge channel in the shielding shell is located within the projection range of the discharge shielding plate along the irradiation direction, the first feed channel faces the feed shielding plate or the partition plate on the right side of the feed shielding plate, and the second feed channel faces the discharge shielding plate or the partition plate on the right side of the discharge shielding plate.

[0013] Preferably, the feed channel and the discharge channel are both arranged obliquely relative to the partition plate, and the feed channel and the discharge channel are configured to gradually approach the partition plate along the electron beam irradiation direction.

[0014] The beneficial effect of the present invention is that the present application divides the irradiation space in the shielding shell into a plurality of relatively independent cavities, which are connected only through corresponding channels. After the x-rays generated in the irradiation area are reflected several times, only the rays that maintain the same angle with the feeding channel can enter the peripheral feeding cavity and the discharging cavity, so the ray intensity of the feeding cavity and the discharging cavity has been weakened, and the feeding channel and the discharging channel are protected for the second time by the feeding shielding plate and the discharging shielding plate, so that the rays need to be reflected several times again before they can be emitted from the feeding channel and the discharging channel, and the shielding ability of the overall structure is greatly enhanced. At the same time, the multiple separated areas can form a regional gradient, which can effectively maintain the protective atmosphere of the inert gas and reduce the gas interference caused by the high-speed running coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A cross-sectional view of a shielding device suitable for high-dose electron beam irradiation according to an embodiment of the present invention;

[0016] Figure 2 The present invention is a cross-sectional view of a shielding device suitable for high-dose electron beam irradiation according to another embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0018] The embodiment of the present invention provides a shielding device suitable for high-dose electron beam irradiation, such as Figure 1 As shown, it includes a sealed shielding shell 1, which is made of shielding materials such as lead. The shielding shell 1 as a whole can be a box structure, and a cavity for accommodating objects is provided in the shielding shell 1. A central partition 3 and a partition plate 4 made of shielding materials such as lead are provided on the inner wall of the shielding shell 1. The central partition 3 divides the cavity into two relatively independent irradiation chambers 120 and a material transfer chamber, and the material transfer chamber is located on the left side of the irradiation chamber 120. The partition plate 4 divides the material transfer chamber into relatively independent feed chambers 110 and discharge chambers 130, and both the feed chambers 110 and the discharge chambers 130 are located on the left side of the irradiation chamber 120.

[0019] The outer surface of the shielding shell 1 is provided with a feed channel 41 communicating with the feed chamber 110 and a discharge channel 42 communicating with the discharge chamber 130. The coil 100 enters the feed chamber 110 from the feed channel 41 and is finally discharged from the discharge channel 42. The central partition plate 3 is provided with a first material transfer channel 31 communicating with the irradiation chamber 120 and the feed chamber 110 respectively and a second material transfer channel 32 communicating with the irradiation chamber 120 and the discharge chamber 130 respectively. The feed chamber 110 and the discharge chamber 130 are both provided with a first guide roller 34 to allow the coil 100 to pass through the channel without contacting the inner wall of the channel.

[0020] An electron beam accelerator 21, a beam absorption plate 22 located on the left side of the electron accelerator 21, a beam shielding plate 23 located on the left side of the beam absorption plate 22, and two second guide rollers 24 are provided in the irradiation chamber 120. The electron beam accelerator 21, the beam absorption plate 22, the beam shielding plate 23, and the two second guide rollers 24 can be fixed on the inner wall of the shielding shell 1, and the second guide rollers 24 can rotate relative to the shielding shell 1. The electron beam accelerator 21 is used to generate an electron beam, so as to irradiate the coil 100 with an electron beam, and the irradiation direction of the electron beam is also to the left. The two second guide rollers 24 can be located at both ends of the beam absorption plate 22, respectively, and the coil 100 between the two second guide rollers 24 is located between the beam absorption plate 22 and the electron beam accelerator 21. As shown in the figure, the coil 100 enters from the feeding channel 41, passes through the first guide roller 34, enters the irradiation chamber 120 from the first feeding channel 31, passes through two second guide rollers 24, enters the discharging chamber 130 from the second feeding channel 32, passes through the first guide roller 34, and finally is discharged from the discharging channel 42. The straightened coil 100 can be perpendicular to the irradiation direction of the electron beam to enhance the electron beam irradiation effect on the surface of the coil 100.

[0021] The beam shielding plate 23 is used to protect the openings of the first material transfer channel 31 and the second material transfer channel 32. The openings of the first material transfer channel 31 and the second material transfer channel 32 in the irradiation chamber are located within the projection of the beam shielding plate 23 on the central partition 3, that is, the beam shielding plate 23 completely covers the first material transfer channel 31 and the second material transfer channel 32. The electron beam generated by the electron accelerator 21 is mainly irradiated on the coil 100 and the beam absorption plate 22, and the strongest X-rays are generated on the irradiated surface. The existence of the beam shielding plate 23 prevents this part of the X-rays from directly entering the first material transfer channel 31 and the second material transfer channel 32. The first material transfer channel 31 and the second material transfer channel 32 are both inclined relative to the central partition 3, that is, the extension direction of the first material transfer channel 31 and the extension direction of the second material transfer channel 32 are both at an acute angle with the central partition 3. As shown in the figure, the first material transfer channel 31 and the second material transfer channel 32 can both extend toward the partition 4. Therefore, the radiation in the irradiation chamber 120 needs to maintain the same angle with the two material passages before it can enter the peripheral feed chamber 110 and the discharge chamber 130, and the radiation intensity reaching the feed chamber 110 and the discharge chamber 130 has been weakened. At the same time, a feed shielding plate 51 is provided in the feed chamber 110 to block the radiation emitted from the first material passage 31 from directly emitting to the feed passage 41, and a discharge shielding plate 52 is provided in the discharge chamber 120 to block the radiation emitted from the second material passage 32 from directly emitting to the discharge passage 42. The feed shielding plate 51 and the discharge shielding plate 52 respectively play a secondary protection role for the feed passage 41 and the discharge passage 42, so that the radiation needs to be reflected multiple times again before it can be emitted from the feed passage 41 and the discharge passage 42, and the shielding ability of the overall structure is greatly enhanced. Inert gas filling pipes are provided in the feed chamber 110, the irradiation chamber 120 and the discharge chamber 130. The inert gas filling pipes respectively fill the three chambers with inert gases such as nitrogen to maintain the low oxygen environment required for electron beam curing. The feed chamber 110 and the discharge chamber 130 can be filled with 99.99% pure nitrogen, and the irradiation chamber 120 can be filled with 99.999% high-purity nitrogen. The amount of gas filled in the irradiation chamber 120 is greater than that in the feed chamber 110, and the amount of gas filled in the feed chamber 110 is much greater than that in the discharge chamber 130. Due to the channel-type opening structure, less air is brought in from the feed channel 41, the feed chamber 110 and the discharge chamber 130 play a transition buffer role, the air brought into the feed chamber 110 is diluted by the pure nitrogen filled, and less oxygen enters the irradiation chamber 120, which can effectively deal with the interference caused by the high-speed running coil 100 and maintain the protective atmosphere of inert gas. At the same time, the length of the channel can be appropriately extended according to the running speed to achieve a better gas protection effect.

[0022] It should be noted that the azimuth expressions used in the present invention do not represent absolute azimuths, but refer to the relative positional relationship between objects. For example, the "left side" in the above embodiment does not represent the absolute left side. When using the above shielding device for high-dose electron beam irradiation, those skilled in the art can place the shielding device at multiple angles as needed, so that the electron beam irradiation direction has different directions in the horizontal direction.

[0023] In one embodiment, the structure of the shielding shell 1 will be described in detail. Figure 1 As shown, the shielding shell 1 includes a right shielding sleeve 11, a left shielding sleeve 13 and a middle shielding sleeve 12 located between the right shielding sleeve 11 and the left shielding sleeve 13. The figure shows a cross-sectional view. The right shielding sleeve 11, the middle shielding sleeve 12 and the left shielding sleeve 13 can be square or round sleeves. The right side end of the right shielding sleeve 11 is closed and the left side end has an opening. The left side end of the left shielding sleeve 13 is closed and the right side end has an opening. The left and right ends of the middle shielding sleeve 12 can have openings, which are respectively connected to the right shielding sleeve 11 and the left shielding sleeve 13. The central partition 3 is fixed on the inner wall of the middle shielding sleeve 12 and can be perpendicular to the axial direction of the middle shielding sleeve 12. The feed channel 41 and the discharge channel 42 can be set on the left side wall of the left shielding sleeve 13. The electron beam accelerator 21 can be located in the right shielding sleeve 11. The beam absorption plate 22, the beam shielding plate 23 and the two second guide rollers 24 can be fixed on the central partition 3 in the middle shielding sleeve 12 through the bracket. The right shielding sleeve 11 and the left shielding sleeve 13 are connected to the middle shielding sleeve 12 in a detachable connection manner. The right shielding sleeve 11, the middle shielding sleeve 12 and the left shielding sleeve 13 can be disassembled to facilitate the loading of the coil 100. The staff can pull the coil 100 through each channel and roller in turn to complete the loading assembly. After being disassembled, the right shielding sleeve 11, the middle shielding sleeve 12 and the left shielding sleeve 13 can be quickly combined into a complete shielding shell 1.

[0024] In one embodiment, a guide rail 101 is further provided at the bottom of the shielding shell 1, and the guide rail 101 extends along the irradiation direction. The bottom of the right shielding sleeve 11 and the left shielding sleeve 13 are also provided with rollers 102 that can move along the guide rail 101. The bottom of the middle shielding sleeve 12 is provided with a fixed block 103 fixed on the guide rail 101, so that the position of the middle shielding sleeve 12 can remain unchanged relative to the guide rail 101. The right shielding sleeve 11 and the left shielding sleeve 13 on both sides are easy to move on the guide rail 101 due to the presence of the rollers 102, and the right shielding sleeve 11, the middle shielding sleeve 12 and the left shielding sleeve 13 can be quickly disassembled or combined into a complete shielding shell 1.

[0025] In one embodiment, a specific detachable connection method will be provided, such as Figure 1As shown, a slot 111 is provided on the left end face of the right shielding sleeve 11, and a slot 111 is also provided on the right end face of the left shielding sleeve 12. The left and right ends of the middle shielding sleeve 12 are respectively inserted into the slots 111 of the right shielding sleeve 11 and the left shielding sleeve 13, adopting a plug-in detachable connection. At the same time, a radiation-resistant sealing strip is provided in the slot 111 to ensure the airtightness inside the shielding shell 1.

[0026] For this detachable structure, the partition plate 4 is fixed on the inner wall of the left shielding sleeve 13, and the surface of the central partition plate 3 is provided with a convex plate 33, and the convex plate 33 is provided with a card slot, and the partition plate 4 is detachably plugged into the card slot. Since the middle shielding sleeve 12 and the left shielding sleeve 13 are detachably connected, the corresponding partition plate 4 is also detachably connected to the central partition plate 3, and the card slot on the convex plate 33 plays a sealing role. A radiation-resistant sealing strip can also be provided in the card slot to isolate the gas flow between the material chamber 110 and the discharge chamber 130.

[0027] Based on the above embodiment, an implementation of the inlet shielding plate 51 and the outlet shielding plate 52 will be provided. Figure 1 As described, both the feed shielding plate 51 and the discharge shielding plate 52 are located on the inner wall of the shielding shell 1, fixed on the bottom inner wall of the left shielding sleeve 13, and both shielding plates are arranged parallel to the partition plate 4, and both the feed channel 41 and the discharge channel 42 are located on the left inner wall of the left shielding sleeve 13. The feed shielding plate 51 is located between the feed channel 41 and the partition plate 4, and the discharge shielding plate 52 is located between the discharge channel 42 and the partition plate 4. There is a certain distance between the feed shielding plate 51 and the partition plate 4, so that a feed shielding groove is formed between the two, and there is a certain distance between the discharge shielding plate 52 and the partition plate 4, so that a discharge shielding groove is formed between the two. The extension direction of the first feed channel 31 is toward the feed shielding groove, and the extension direction of the second feed channel 32 is toward the discharge shielding groove. Therefore, the rays emitted from the first feed channel 31 and the second feed channel 32 will be injected into the shielding groove, and can only be reflected from the shielding groove through multiple reflections of the shielding groove, thereby weakening the intensity of the rays.

[0028] In this structure, the feed channel 41 and the discharge channel 42 are also inclined relative to the partition plate 4, and the extension lines on the right side of the feed channel 41 and the discharge channel 42 will be close to the corresponding shielding plates, making it more difficult for the reflected rays to be emitted from the feed channel 41 and the discharge channel 42, further enhancing the shielding effect.

[0029] Based on the above embodiment, another implementation of the inlet shielding plate 51 and the outlet shielding plate 52 is provided. Figure 2As described, both the feed shielding plate 51 and the discharge shielding plate 52 are arranged on the partition plate 4, the opening of the feed channel 41 in the shielding shell 1 is located within the projection of the feed shielding plate 51 on the shielding shell 1, and the opening of the discharge channel 42 in the shielding shell 1 is located within the projection of the discharge shielding plate 52 on the shielding shell 1, and the first feed channel 31 and the second feed channel 32 are configured to gradually approach the partition plate 4 along the electron beam irradiation direction. The first feed channel 31 faces the feed shielding plate 51 or the partition plate 4 on the right side of the feed shielding plate 51, and the second feed channel 32 faces the discharge shielding plate 52 or the partition plate 4 on the right side of the discharge shielding plate 52, and the rays emitted from the first feed channel 31 and the second feed channel 32 will be blocked by the vertically arranged shielding plates.

[0030] like Figure 2 As shown in , two first guide rollers 34 are provided in the feed chamber 110 and the discharge chamber 130. In the feed chamber 110, one first guide roller 34 is located on the right side of the feed shielding plate 51, and the other first guide roller 34 is located at the end of the feed shielding plate 51. In the discharge chamber 130, one first guide roller 34 is located on the right side of the discharge shielding plate 52, and the other first guide roller 34 is located at the end of the discharge shielding plate 52. The feed channel 41 and the discharge channel 42 are both inclined relative to the partition plate 4, and the feed channel 41 and the discharge channel 42 are configured to gradually approach the partition plate 4 along the electron beam irradiation direction. The two first guide rollers 34 change the transmission direction of the coil 100 twice to bypass the feed shielding plate 51 and the discharge shielding plate 52.

[0031] The feed channel 41, the discharge channel 42, the first feed channel 31 and the second feed channel 32 of the above embodiment all have a height-adjustable structure, which is used to increase the channel height when the coil 100 is loaded, so as to facilitate the film-penetrating operation. After the film-penetrating is completed, the channel height is adjusted to the minimum under the premise that the system operates normally without scraping the film. This structure is a mature design, so it will not be described in detail.

[0032] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

1. A shielding device suitable for high-dose electron beam irradiation, characterized in that: The invention comprises a closed shielding shell, wherein a cavity is arranged in the shielding shell, and an inner wall of the shielding shell is provided with a central partition and a partition plate made of shielding material, wherein the central partition divides the cavity into an irradiation chamber and a feeding chamber, wherein the feeding chamber is located on the left side of the irradiation chamber, and the partition plate divides the feeding chamber into an inlet chamber and an outlet chamber; an inlet channel connected to the inlet chamber and an outlet chamber are arranged on the outer surface of the shielding shell, a first inlet channel connected to the irradiation chamber and the inlet chamber respectively and a second inlet channel connected to the irradiation chamber and the outlet chamber respectively are arranged on the central partition, and a first guide roller is arranged in each of the inlet chamber and the outlet chamber; the irradiation chamber is provided with an electron beam accelerator, a beam absorption plate located on the left side of the electron accelerator, and a beam absorption plate located on the left side of the electron accelerator. The under-beam shielding plate on the left side of the receiving plate and the two second guide rollers for tightening the coil, the coil between the two second guide rollers passes through the electron accelerator and the beam absorption plate, the first material transfer channel and the second material transfer channel are both located on the left side of the under-beam shielding plate, and the openings of the first material transfer channel and the second material transfer channel in the irradiation chamber are located within the projection range of the under-beam shielding plate along the irradiation direction; the first material transfer channel and the second material transfer channel are both inclined relative to the central partition plate, the feeding chamber is provided with a feeding shielding plate for blocking the rays emitted from the first feeding channel from entering the feeding channel, and the discharging chamber is provided with a discharging shielding plate for blocking the rays emitted from the second feeding channel from entering the discharging channel; the feeding chamber, the irradiation chamber and the discharging chamber are all provided with inert gas inflation tubes.

2. The shielding device for high-dose electron beam irradiation according to claim 1, characterized in that: The shielding shell includes a right shielding sleeve, a left shielding sleeve and a middle shielding sleeve located between the right shielding sleeve and the left shielding sleeve. The right shielding sleeve and the left shielding sleeve are both detachably connected to the middle shielding sleeve. The central partition is fixed on the inner wall of the middle shielding sleeve. The feed channel and the discharge channel are both arranged on the left shielding sleeve.

3. The shielding device for high-dose electron beam irradiation according to claim 2, characterized in that: The end surface of the right shielding sleeve close to the middle shielding sleeve is provided with a left slot, and the end surface of the left shielding sleeve close to the middle shielding sleeve is provided with a right slot, and the two ends of the middle shielding sleeve are respectively inserted into the left slot and the right slot.

4. The shielding device for high-dose electron beam irradiation according to claim 3 is characterized in that: A guide rail is also provided below the shielding shell, rollers movable along the guide rail are provided at the bottom of the right shielding sleeve and the left shielding sleeve, and a fixing block fixed on the guide rail is provided at the bottom of the middle shielding sleeve.

5. The shielding device suitable for high-dose electron beam irradiation according to claim 3, characterized in that: The partition plate is fixed on the left shielding sleeve, and a convex plate is provided on the surface of the central partition plate close to the left shielding sleeve. A slot is provided on the convex plate, and the partition plate is detachably plugged into the slot.

6. The shielding device suitable for high-dose electron beam irradiation according to claim 5, characterized in that: Radiation-resistant sealing strips are attached to the left slot of the right shielding sleeve, the right slot of the left shielding sleeve, and the card slot of the convex plate.

7. The shielding device suitable for high-dose electron beam irradiation according to any one of claims 1 to 6, characterized in that: The feed shielding plate and the discharge shielding plate are both located on the inner wall of the shielding shell, the feed shielding plate is located between the feed channel and the partition plate, the discharge shielding plate is located between the discharge channel and the partition plate, an feed shielding slot is formed between the feed shielding plate, the shielding shell and the partition plate, and an discharge shielding slot is formed between the discharge shielding plate, the shielding shell and the partition plate, the first feed channel faces the feed shielding slot, and the second feed channel faces the discharge shielding slot.

8. The shielding device suitable for high-dose electron beam irradiation according to any one of claims 1 to 6, characterized in that: The feed shielding plate and the discharge shielding plate are both arranged on the partition plate, the opening of the feed channel in the shielding shell is located within the projection range of the feed shielding plate along the irradiation direction, the opening of the discharge channel in the shielding shell is located within the projection range of the discharge shielding plate along the irradiation direction, the first feed channel faces the feed shielding plate or the partition plate on the right side of the feed shielding plate, and the second feed channel faces the discharge shielding plate or the partition plate on the right side of the discharge shielding plate.

9. The shielding device for high-dose electron beam irradiation according to claim 8, characterized in that: The feed channel and the discharge channel are both arranged obliquely relative to the partition plate, and the feed channel and the discharge channel are configured to gradually approach the partition plate along the electron beam irradiation direction.

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