An inlet and outlet shielding structure suitable for electron beam irradiation of coiled material

Abstract

The present invention discloses an inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials, comprising a first shielding shell and a second shielding shell, wherein a shielding cover is arranged at the lower end of the first shielding shell, and a shielding guide roller is arranged at the upper end of the second shielding shell, wherein the extending direction of the shielding cover is parallel to the axial direction of the shielding guide roller and the cross section of the shielding cover is arc-shaped, and the peripheral surface of the shielding guide roller comprises a guide part and a sealing part; the lower end of the first shielding shell is fixed on the outer side surface of the shielding cover, and a guide channel for the coiled materials to pass through is formed between the inner side surface of the shielding cover and the guide part; a sealing shielding assembly for closing the gap between the sealing part and the second shielding shell is arranged between the sealing part and the second shielding shell. The present invention can reduce the gas interference caused by the movement of the coiled materials and maintain an irradiation environment with a low oxygen content.

Description

Technical Field

[0001] The invention relates to the technical field of electron beam irradiation, in particular to an inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials. Background Art

[0002] Electron beam irradiation has a wide range of applications in curing, disinfection, sterilization and irradiation modification. Its high energy and fast production speed are one of the reasons why it is sought after by the market. When the coil is irradiated with electron beams, the harmful rays and oxygen inhibition problems must be solved. The usual design is to use a maze to shield harmful rays, and to use measures such as lengthening the channel, increasing the amount of protective gas, and reducing the feed port to ensure that the oxygen content in the irradiation environment is low enough. However, these measures to maintain the gas environment have limitations. For example, if the feed gate is reduced, at least 3mm of height must be retained due to the vibration of the coil itself during high-speed transportation. When the coil moves at a high speed (such as more than 200m / min), a large amount of air will be brought into the curing environment along with the coil. Therefore, it is necessary to increase the amount of protective gas and lengthen the channel to block the entry of air, and these measures will increase costs. Summary of the invention

[0003] The invention provides an inlet and outlet shielding structure suitable for coil electron beam irradiation, which can reduce gas interference caused by coil movement and maintain an irradiation environment with low oxygen content.

[0004] An embodiment of the present invention provides an inlet and outlet shielding structure suitable for electron beam irradiation of a coiled material, comprising a first shielding shell and a second shielding shell, wherein a shielding cover is arranged at the lower end of the first shielding shell, and a shielding guide roller is arranged at the upper end of the second shielding shell, wherein the extension direction of the shielding cover is parallel to the axial direction of the shielding guide roller and the cross-section of the shielding cover is arc-shaped, and the circumferential surface of the shielding guide roller comprises a guiding portion and a sealing portion; the lower end of the first shielding shell is fixed on the outer side surface of the shielding cover, and a guiding channel for the coiled material to pass through is formed between the inner side surface of the shielding cover and the guide portion; a sealing shielding assembly for closing the gap between the sealing portion and the second shielding shell is arranged between the sealing portion and the second shielding shell.

[0005] Preferably, the sealing and shielding assembly includes a shielding seat and a sealing member arranged on the shielding seat, the upper surface of the shielding seat is provided with a groove, the sealing portion is wholly or partially arranged in the groove and does not contact the inner wall of the groove; the sealing member is used to seal the gap between the shielding guide roller and the shielding seat.

[0006] Preferably, the sealing member is an elastic pressing sheet, and the upper end of the elastic pressing sheet abuts against the circumferential surface of the shielding guide roller.

[0007] Preferably, the shielding cover is fixedly connected to an inert gas pipe, the inert gas pipe is provided with an outlet, the outlet is close to the coil and the airflow direction of the inert gas blown out from the outlet is opposite to the moving direction of the coil.

[0008] Preferably, two inert gas pipes are provided, and the two inert gas pipes are respectively located at two ends of the shielding cover in the moving direction of the coil.

[0009] Preferably, the first shielding shell and the second shielding shell are an integrally connected shielding plate, an opening is provided on the shielding plate, and the shielding cover, the shielding guide roller and the sealing shielding assembly are all located in the opening.

[0010] Preferably, the opening is rectangular, the axial direction of the shielding guide roller is parallel to the extension direction of the long side of the opening, the sealing shielding assembly and the shielding cover are respectively located on the inner side surfaces where the two long sides of the opening are located, the two ends of the shielding cover in the axial direction of the shielding guide roller are respectively abutted against or fixed on the inner side surfaces where the two short sides of the opening are located, and the two ends of the shielding guide roller are respectively rotatably connected to the inner side surfaces where the two short sides of the opening are located.

[0011] Preferably, the entrance and exit shielding structure suitable for electron beam irradiation of coiled materials also includes a third shielding shell, which is slidably connected to the first shielding shell, and the first shielding shell is connected to a driver, which is used to drive the first shielding shell to approach or move away from the shielding guide roller along the radial direction of the shielding guide roller.

[0012] Preferably, the inert gas pipe extends along the axial direction of the shielding guide roller, and the gas outlets are evenly distributed on the surface of the inert gas pipe along the axial direction of the shielding guide roller.

[0013] Preferably, the shielding cover, shielding guide roller and sealing shielding assembly all include an inner layer and an outer layer, the inner layer is made of shielding material, and the outer layer is a stainless steel layer, and the stainless steel layer is coated on the surface of the shielding material.

[0014] In the present invention, the inlet of the shielding structure is arranged at the guide roller, and the coil is attached to the guide roller and moves under the action of tension, so that the space of the inlet and outlet can be minimized to the greatest extent, and the air brought in by the coil can be reduced. The lower part of the shielding guide roller is sealed by a sealing shielding assembly to prevent gas leakage and radiation leakage between the shielding guide roller and the shielding shell. The outlet of the inert gas pipe blows out inert gas in the opposite direction of the air flow, which can further prevent the entry of air, thereby effectively reducing the gas interference caused by the movement of the coil, maintaining an irradiation environment with a low oxygen content, thereby greatly reducing the amount of inert gas used and simplifying the design of the shielding structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A schematic cross-sectional view of an inlet and outlet shielding structure suitable for electron beam irradiation of a web according to an embodiment of the present invention;

[0016] Figure 2 A partial cross-sectional schematic diagram of an inlet and outlet shielding structure suitable for electron beam irradiation of a web according to an embodiment of the present invention;

[0017] Figure 3 It is a front schematic diagram of an inlet and outlet shielding structure suitable for electron beam irradiation of a web according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] It should be noted that the directional expressions used in the present invention do not represent absolute directions, but refer to the relative positional relationship between objects. For example, the "upper end" and "lower end" used in the embodiments below are described based on the positional relationship presented in the drawings of the specification. When a person skilled in the art actually uses the above-mentioned entrance and exit shielding structure suitable for electron beam irradiation of a coil, it can be oriented in any direction, and the positional relationship of the "upper end" and "lower end" will change accordingly. The present invention will be further described in detail below through specific implementation methods combined with the drawings.

[0019] The embodiment of the present invention provides an inlet and outlet shielding structure suitable for electron beam irradiation of a coiled material, such as Figure 1-3 As shown, it includes a first shielding shell 11 and a second shielding shell 12. The first shielding shell 11 and the second shielding shell 12 can both be plate-shaped, and the two can be arranged in parallel, and a certain distance is spaced between the ends close to each other. A shielding cover 2 is arranged at the lower end of the first shielding shell 11, and a shielding guide roller 3 is arranged at the upper end of the second shielding shell 12. The extending direction of the shielding cover 2 is parallel to the axial direction of the shielding guide roller 3, and the shielding cover 2 is configured to be an arc shape close to the shielding guide roller 3. Since the shielding cover 2 has a certain thickness, the side relatively close to the center of the circle is the inner side surface, and the side relatively far from the center of the circle is the outer side surface. The lower end of the second shielding shell 12 is fixed on the outer side surface of the shielding cover 2, and the inner side surface of the shielding cover 2 is close to the shielding guide roller 3.

[0020] The shielding guide roller 3 can rotate relative to the second shielding shell 12. The circumference of the shielding guide roller 3 includes a guide portion 31 and a sealing portion 32. The guide portion 31 and the sealing portion 32 here do not refer to the portions with fixed positions on the circumference of the shielding guide roller 3. If the positions of the guide portion 31 and the sealing portion 32 on the circumference of the shielding guide roller 3 are fixed, they will rotate together with the shielding guide roller 3. Therefore, the positions of the guide portion 31 and the sealing portion 32 relative to the shielding cover 2 and the second shielding shell 12, respectively, do not change with the rotation of the shielding guide roller 3. Specifically, the guide portion 31 refers to the portion of the circumference of the shielding guide roller 3 that is always close to the shielding cover 2, and the sealing portion 32 refers to the portion of the circumference of the shielding guide roller 3 that is always close to the second shielding shell 12.

[0021] The shielding cover 2 and the guide part 31 are close to each other but not in contact. A guide channel 200 is formed between the inner side of the shielding cover 2 and the guide part 31 for the coil 100 to pass through. The coil 100 contacts the guide part 31. As the shielding guide roller 3 rotates, the guide part 31 will drive the coil 100 to move, so that the coil 100 passes through the guide channel 200. Due to the guidance of the guide part 31, the coil 100 is not easy to jump in the guide channel 200, so that the space of the guide channel 200 can be reduced to a certain extent. As shown in the figure, the shielding guide roller 3 can be configured to push the coil 100 upward, so as to tighten the coil 100 and make the coil 100 close to the guide part 31, which can further reduce the jumping of the coil 100 and further reduce the space of the guide channel 200. Since the guide channel 200 is compressed to a very small size, the air brought into the shielding structure with the coil 100 is also greatly reduced. At the same time, harmful rays must be reflected multiple times between the shielding cover 2 and the shielding guide roller 3 before they can be emitted from the guide channel 200. Therefore, the above-mentioned shielding structure can effectively maintain the gas protection environment and can play a good shielding role.

[0022] A sealing shielding assembly 4 for closing the gap between the sealing portion 32 and the second shielding shell 12 is arranged between the sealing portion 32 and the second shielding shell 12. Since the shielding guide roller 3 needs to rotate, a certain space needs to be reserved between the shielding guide roller 3 and the second shielding shell 12. In order to prevent gas leakage from the space and to prevent radiation leakage from the space, a sealing shielding assembly 4 is arranged in the space.

[0023] In one embodiment, a specific structure of the sealing shielding component 4 is provided, such as Figure 1 As shown, the sealing shielding assembly 4 includes a shielding seat, and a groove 40 is provided on the upper surface of the shielding seat. The cross-sectional shape of the groove 40 can be rectangular. The sealing portion 32 is arranged in whole or in part in the groove 40, but does not contact the inner wall of the groove 40, thereby forming a labyrinth-like shielding structure. The rays entering the groove 40 need to be reflected multiple times before they can be emitted outward, and the radiation intensity has been greatly attenuated, which has a good shielding effect. The sealing portion 32 can be arranged close to the inner wall of the groove 40, and the distance between the sealing portion 32 and the inner wall of the groove 40 can be reduced, which can further enhance the shielding effect.

[0024] Furthermore, on the basis of the sealing shielding assembly 4, it is necessary to further consider the sealing problem in order to maintain the irradiation environment. In one embodiment, a sealing block, such as a slider made of graphite, may be provided in the groove 40. The sealing block contacts the surface of the sealing portion 32 to play a sealing role while allowing the shielding guide roller 3 to rotate freely. In another embodiment, an elastic pressing sheet 41 is also fixed on the shielding seat, the lower end of which is fixed on the shielding seat, and the upper end is against the circumferential surface of the shielding guide roller 3, which plays a role in blocking the flow of gas. The elastic pressing sheet 41 may be made of brass or other elastic materials. During the rotation of the shielding guide roller 3, the elastic pressing sheet 41, under the action of its own elastic reset force, is tightly attached to the surface of the shielding guide roller 3, which can further enhance the sealing performance.

[0025] like Figure 1 As shown, the coil 100 moves from the left side to the right side in the figure. When the shielding structure is set at the entrance position, Figure 1 The left side of the center is the outside world. Figure 1 The right side of the middle is the inside of the shielding structure. Since the guide channel 200 is extremely narrow, the gas brought into the coil 100 is very small, and the shielding structure can maintain a low oxygen content irradiation environment. When this shielding structure is set at the outlet, Figure 1 The left side of the center shows the interior of the shielding structure. Figure 1 The right side in the middle is the outside world. Since the coil 100 moves from the shielding structure to the external atmospheric environment, it will carry the internal low-oxygen gas to the external environment. The airflow generated thereby can prevent external air from entering the interior.

[0026] In the above embodiment, although the guide channel 200 is extremely narrow and can reduce the amount of air brought into the shielding structure by the coil 100, a small amount of air will still be brought in. Therefore, based on the above embodiment, this embodiment also provides an improved inlet shielding structure, which is mainly suitable for the situation where the coil 100 moves at a high speed, such as Figure 1 As shown, the shielding cover 2 is fixedly connected with an inert gas pipe 21, which can be located at the end of the shielding cover 2 or at the inner side of the shielding cover 2 close to the shielding guide roller 3. The inert gas pipe 21 is arranged close to the coil 100, but cannot contact the coil 100. The inert gas pipe 21 is filled with an inert gas such as nitrogen, and the inert gas pipe 21 is provided with an outlet 20, from which the inert gas will be blown out. The outlet 20 is arranged close to the coil 100, and the airflow direction of the inert gas blown out from the outlet 20 is opposite to the moving direction of the coil 100. Since the coil 100 will drive the surrounding air to flow along its moving direction during the high-speed movement, setting the airflow direction of the inert gas opposite to the moving direction of the coil 100 can prevent the flow of air, so as to maintain the irradiation environment with low oxygen content inside the shielding structure.

[0027] like Figure 1 As shown, the coil 100 moves from the left side to the right side in the figure. When the shielding structure is set at the entrance position, Figure 1 The left side of the center is the outside world. Figure 1 The middle right side is the interior of the shielding structure. The interior of the shielding structure needs to maintain an irradiation environment with a low oxygen content. The airflow caused by the movement of the coil 100 will be blocked by the inert gas blown out of the outlet 20.

[0028] Further, such as Figure 1 As shown, two inert gas pipes 21 can be provided, and the two inert gas pipes 21 are respectively located at the two ends of the shielding cover 2 in the moving direction of the coil 100. The two inert gas pipes 21 can block the airflow twice, further reduce the gas interference caused by the movement of the coil 100, and maintain the irradiation environment with low oxygen content. In the figure, an inert gas pipe 21 located on the left side can blow air above the coil 100 to destroy the wall-adhering flow formed by the movement of the coil 100, and an inert gas pipe 21 located on the right side can blow air into the guide channel 200 to ensure that the air pressure in the guide channel 200 is greater than the external environment, further preventing air from entering. The inert gas pipe 21 located on the right side can be set to protrude from the inner side of the shielding cover 2, and its air outlet 20 is located at the protruding part, so that the airflow direction of the gas blown out of the air outlet 20 is parallel and opposite to the moving direction of the coil 100.

[0029] In one embodiment, if Figure 3 As shown, the first shielding shell 11 and the second shielding shell 12 are an integrated shielding plate 1, forming a whole plate, and the whole shielding plate 1 covers the position where the entrance and exit are located. An opening is set on the shielding plate 1, and the shielding cover 2, the shielding guide roller 3 and the sealing shielding assembly 4 are all located in the opening, and the shielding cover 2 and the sealing shielding assembly 4 are respectively fixed on the inner wall of the opening. This structural setting can enhance the overall structural strength of the shielding structure and facilitate the assembly of the shielding shell.

[0030] Further, such as Figure 1 and Figure 3As shown, the opening may be rectangular, with two long sides 101 and two short sides 102. The axial direction of the shielding guide roller 3 is parallel to the extension direction of the long side 101 of the opening, and the two ends of the shielding guide roller 3 are respectively rotatably connected to the inner side surface where the two short sides 102 of the opening are located. Specifically, a rotating shaft 30 is provided at the center of the shielding guide roller 3, and the rotating shaft 30 can be rotatably connected to the inner side surface where the two short sides 102 are located. For example, a rotating hole is provided on the inner side surface where the short sides 102 are located, and the rotating shafts 30 at both ends are respectively inserted into the two rotating holes and can rotate in the rotating holes. The length of the shielding guide roller 3 is set to be slightly smaller than the length of the opening to ensure that the shielding guide roller 3 can rotate smoothly in the opening. Of course, in order to prevent leakage from the gap between the two ends of the shielding guide roller 3 and the side surface where the short sides 102 of the opening are located, a sealing layer can be provided between the two ends of the shielding guide roller 3 and the short sides 102 of the opening.

[0031] The sealing shielding component 4 and the shielding cover 2 are respectively fixed to the inner side surface where the two long sides 101 of the opening are located, and the lengths of the sealing shielding component 4 and the shielding cover 2 can be configured to be equal to the length of the opening or slightly less than the length of the opening. The two ends of the shielding cover 2 in the axial direction of the shielding guide roller 3 are respectively against or fixed to the inner side surface where the two short sides 102 of the opening are located, and the two ends of the sealing shielding component 4 in the axial direction of the shielding guide roller 3 are also respectively against or fixed to the inner side surface where the two short sides 102 of the opening are located. In this way, the sealing and shielding effects of the two end portions in the length direction of the opening can be guaranteed.

[0032] In one embodiment, the inlet and outlet shielding structure suitable for coil electron beam irradiation of the above embodiment further includes a third shielding shell 13, the third shielding shell 13 is slidably connected to the first shielding shell 11, and specifically, a guide groove can be opened on the third shielding shell 13, and a slider is fixed on the first shielding shell 11, and the slider is arranged in the guide groove and can move along the guide groove, and the guide groove is arranged to extend along the radial direction of the shielding guide roller 3. The first shielding shell 11 is connected to a driver 14, and the driver 14 can be a cylinder, and the cylinder is provided with a corresponding push rod, and the push rod is connected to the first shielding shell 11, and the cylinder is fixed on the third shielding shell 13. The driver 14 can drive the first shielding shell 11 to approach or move away from the shielding guide roller 3 along the radial direction of the shielding guide roller 3, and accordingly, the shielding cover 2 also approaches or moves away from the shielding guide roller 3 along the radial direction of the shielding guide roller 3, so that the height of the guide channel 200 can be adjusted to adapt to coils 100 of different thicknesses. At the same time, the film penetration operation can be facilitated by increasing the height of the guide channel 200.

[0033] When the above-mentioned adjustable structure is adopted, the third shielding shell 13 can be integrated with the second shielding shell 12 to form a shielding plate 1 to form a whole plate. An opening is provided on the shielding plate 1, and the shielding cover 2, the shielding guide roller 3 and the sealing shielding assembly 4 are all located in the opening. The shielding cover 2 and the sealing shielding assembly 4 are respectively fixed on the inner wall of the opening.

[0034] In one embodiment, the inert gas pipe 21 extends along the axial direction of the shielding guide roller 3. When the opening is rectangular, the length of the inert gas pipe 21 matches the length of the opening and is equal to or slightly less than the length of the opening. A plurality of gas outlets 20 are provided and are evenly distributed on the surface of the inert gas pipe 21 along the axial direction of the shielding guide roller 3, so that the force distribution of gas blocking is more uniform, and the gas at various locations along the length direction of the opening can be blocked, further effectively maintaining the irradiation environment with low oxygen content. Of course, the gas outlet 20 can also be set as a slender strip, the length of which matches the length of the inert gas pipe 21, thereby forming a continuous wind curtain, which can further reduce the gas interference caused by the movement of the coil 100.

[0035] In the above embodiment, the shielding cover 2 and the shielding guide roller 3 can be arranged concentrically, and the height of the guide channel 200 remains fixed. This structure requires that the coil 100 in the guide channel 200 is tightly attached to the circumference of the shielding guide roller 3, otherwise it will contact the shielding cover 2.

[0036] To this end, this embodiment provides a more optimized structure, such as Figure 1 As shown in , the curvature radius of the shielding cover 2 is greater than the radius of the shielding guide roller 3, and the center of the shielding cover 2 is not on the axis of the shielding guide roller 3, so the height of the guide channel 200 gradually decreases along the moving direction of the coil 100, and then gradually increases, with a middle position with the minimum height. The coil 100 is not easy to contact the shielding cover 2, and the tightness requirement for the coil 100 in the guide channel 200 is no longer strict.

[0037] In one embodiment, the shielding cover 2, the shielding guide roller 3 and the sealing shielding assembly 4 can all include an inner layer and an outer layer, the inner layer is made of a shielding material such as lead, and the outer layer can be a stainless steel layer, and the stainless steel layer can be coated on the surface of the lead layer. The shielding material of the inner layer should be thick enough to ensure that the internal radiation cannot directly penetrate the shielding guide roller 3.

[0038] After testing, the nitrogen consumption of the 200kv electron beam coil equipment with an original operating speed of 200m / min was 200m / h, and the internal shielding structure needed to reflect the X-rays internally three times. After using this inlet and outlet design, the nitrogen consumption was reduced to 100m / h, and the internal shielding structure only needed to reflect the X-rays once, which greatly reduced the operating cost and design difficulty, and had significant economic benefits.

[0039] 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. An inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials, characterized in that: It comprises a first shielding shell and a second shielding shell, wherein a shielding cover is arranged at the lower end of the first shielding shell, and a shielding guide roller is arranged at the upper end of the second shielding shell, wherein the extending direction of the shielding cover is parallel to the axial direction of the shielding guide roller and the cross section of the shielding cover is arc-shaped, and the circumferential surface of the shielding guide roller comprises a guiding part and a sealing part; the lower end of the first shielding shell is fixed on the outer side surface of the shielding cover, and a guiding channel for the coil to pass through is formed between the inner side surface of the shielding cover and the guiding part; a sealing shielding assembly for closing the gap between the sealing part and the second shielding shell is arranged between the sealing part and the second shielding shell.

2. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to claim 1, characterized in that: The sealing and shielding assembly includes a shielding seat and a sealing member arranged on the shielding seat. The upper surface of the shielding seat is provided with a groove. The sealing portion is fully or partially arranged in the groove and does not contact the inner wall of the groove. The sealing member is used to seal the gap between the shielding guide roller and the shielding seat.

3. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to claim 2, characterized in that: The sealing member is an elastic pressing sheet, and the upper end of the elastic pressing sheet abuts against the peripheral surface of the shielding guide roller.

4. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to claim 1, characterized in that: The shielding cover is fixedly connected with an inert gas pipe, and the inert gas pipe is provided with an outlet. The outlet is close to the coil and the airflow direction of the inert gas blown out from the outlet is opposite to the moving direction of the coil.

5. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to claim 4, characterized in that: There are two inert gas pipes, which are respectively located at two ends of the shielding cover in the moving direction of the coil.

6. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to any one of claims 1 to 5, characterized in that: The first shielding shell and the second shielding shell are an integrally connected shielding plate, an opening is provided on the shielding plate, and the shielding cover, the shielding guide roller and the sealing shielding assembly are all located in the opening.

7. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to claim 6, characterized in that: The opening is rectangular, the axial direction of the shielding guide roller is parallel to the extension direction of the long side of the opening, the sealing shielding assembly and the shielding cover are respectively located on the inner side surfaces where the two long sides of the opening are located, the two ends of the shielding cover in the axial direction of the shielding guide roller are respectively abutted or fixed on the inner side surfaces where the two short sides of the opening are located, and the two ends of the shielding guide roller are respectively rotatably connected to the inner side surfaces where the two short sides of the opening are located.

8. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to any one of claims 1 to 5, characterized in that: The entrance and exit shielding structure suitable for electron beam irradiation of coiled materials also includes a third shielding shell, which is slidably connected to the first shielding shell. The first shielding shell is connected to a driver, which is used to drive the first shielding shell to move closer to or away from the shielding guide roller along the radial direction of the shielding guide roller.

9. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to claim 4 or 5, characterized in that: The inert gas pipe extends along the axial direction of the shielding guide roller, and the gas outlets are evenly distributed on the surface of the inert gas pipe along the axial direction of the shielding guide roller.

10. The inlet and outlet shielding structure suitable for electron beam irradiation of coiled materials according to any one of claims 1 to 5, characterized in that: The shielding cover, shielding guide roller and sealing shielding assembly all include an inner layer and an outer layer, the inner layer is made of shielding material, and the outer layer is a stainless steel layer, and the stainless steel layer is coated on the surface of the shielding material.

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