阅读说明：本技术 一种适用于高剂量电子束辐照屏蔽装置 (Be applicable to high dose electron beam irradiation shield assembly ) 是由 孔超 陈立 任杰 李林 于 2019-10-17 设计创作，主要内容包括：一种适用于高剂量电子束辐照屏蔽装置,包括密闭的屏蔽壳,屏蔽壳内设有空腔,屏蔽壳内壁设有由屏蔽材料制成的中央隔板和分隔板,中央隔板将空腔分隔为辐照腔和过料腔,分隔板将过料腔分隔为入料腔和出料腔；屏蔽壳的外表面设有与入料腔连通的入料通道以及与出料腔连通的出料通道,中央隔板上设有第一过料通道和第二过料通道,入料腔和出料腔内均设有第一导向辊；辐照腔设有电子束加速器、位于电子加速器左侧的束流吸收板、位于束流吸收板左侧的束下屏蔽板以及两个第二导向辊,两个第二导向辊之间的卷材从电子加速器和束流吸收板之间穿过,第一过料通道和第二过料通道均位于束下屏蔽板左侧。本发明可以维持电子束辐照时所需的气体环境并保障屏蔽效果。(A shielding device suitable for high-dose electron beam irradiation comprises a closed shielding shell, wherein a cavity is arranged in the shielding shell, a central partition plate and a partition plate which are made of shielding materials are arranged on the inner wall of the shielding shell, the cavity is divided into an irradiation cavity and a material passing cavity by the central partition plate, and the material passing cavity is divided into a material inlet cavity and a material outlet cavity by the partition plate; a feeding channel communicated with the feeding cavity and a discharging channel communicated with the discharging cavity are arranged on the outer surface of the shielding shell, a first material passing channel and a second material passing channel are arranged on the central partition plate, and first guide rollers are arranged in the feeding cavity and the discharging cavity; the irradiation cavity is provided with an electron beam accelerator, a beam absorption plate positioned on the left side of the electron accelerator, a lower beam shielding plate positioned on the left side of the beam absorption plate and two second guide rollers, a coiled material between the two second guide rollers penetrates through the space between the electron accelerator and the beam absorption plate, and the first material passing channel and the second material passing channel are both positioned on the left side of the lower beam shielding plate. The invention can maintain the gas environment required by electron beam irradiation and ensure the shielding effect.)

1. A shielding device for high-dose electron beam irradiation, comprising:

the shielding device comprises a closed shielding shell, wherein a cavity is arranged in the shielding shell, a central partition plate and a partition plate which are made of shielding materials are arranged on the inner wall of the shielding shell, the cavity is divided into an irradiation cavity and a material passing cavity by the central partition plate, the material passing cavity is positioned on the left side of the irradiation cavity, and the material passing cavity is divided into a feeding cavity and a discharging cavity by the partition plate; the outer surface of the shielding shell is provided with a feeding channel communicated with the feeding cavity and a discharging channel communicated with the discharging cavity, the central partition plate is provided with a first material passing channel communicated with the irradiation cavity and the feeding cavity respectively and a second material passing channel communicated with the irradiation cavity and the discharging cavity respectively, and the feeding cavity and the discharging cavity are both provided with first guide rollers; the irradiation cavity is provided with an electron beam accelerator, a beam absorption plate positioned on the left side of the electron accelerator, a beam lower shielding plate positioned on the left side of the beam absorption plate and two second guide rollers for tensioning coiled materials, the coiled materials between the two second guide rollers pass through the space between the electron accelerator and the beam absorption plate, the first material passing channel and the second material passing channel are both positioned on the left side of the beam lower shielding plate, and openings of the first material passing channel and the second material passing channel in the irradiation cavity are positioned in the projection range of the beam lower shielding plate along the irradiation direction; the first material passing channel and the second material passing channel are obliquely arranged relative to the central partition plate, a material feeding shielding plate for blocking rays emitted from the first material passing channel from emitting to the material feeding channel is arranged in the material feeding cavity, and a material discharging shielding plate for blocking rays emitted from the second material passing channel from emitting to the material discharging channel is arranged in the material discharging cavity; and inert gas inflation pipes are arranged in the feeding cavity, the irradiation cavity and the discharging cavity.

2. The shielding apparatus for high-dose electron beam irradiation according to claim 1, wherein:

the shielding shell comprises a right shielding sleeve, a left shielding sleeve and a middle shielding sleeve positioned between the right shielding sleeve and the left shielding sleeve, the right shielding sleeve and the left shielding sleeve are detachably connected with the middle shielding sleeve, the central partition board is fixed on the inner wall of the middle shielding sleeve, and the feeding channel and the discharging channel are both arranged on the left shielding sleeve.

3. The shielding apparatus for high-dose electron beam irradiation according to claim 2, wherein:

the terminal surface that right side shielding sleeve is close to well shielding sleeve is equipped with left slot, the terminal surface that left side shielding sleeve is close to well shielding sleeve is equipped with right slot, well shielding sleeve's both ends are inserted respectively in left slot and the right slot.

4. The shielding apparatus for high-dose electron beam irradiation according to claim 3, wherein:

the shielding shell's below still is equipped with the guide rail, right side shielding sleeve and left shielding sleeve's bottom still are equipped with and follow the gyro wheel that the guide rail removed, well shielding sleeve's bottom is equipped with the fixed block of fixing on the guide rail.

5. The shielding apparatus for high-dose electron beam irradiation according to claim 3, wherein:

the partition plate is fixed on the left shielding sleeve, a convex plate is arranged on the surface of one side, close to the left shielding sleeve, of the central partition plate, a clamping groove is formed in the convex plate, and the partition plate is detachably inserted into the clamping groove.

6. The shielding apparatus for high-dose electron beam irradiation according to claim 5, wherein:

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 clamping grooves of the convex plates.

7. The shielding device for high-dose electron beam irradiation according to any one of claims 1 to 6, wherein:

pan feeding shield plate and ejection of compact shield plate all are located the inner wall of shielding shell, the pan feeding shield plate is located between pan feeding passageway and the division board, and ejection of compact shield plate is located between discharging channel and the division board, forms the pan feeding shielding groove between pan feeding shield plate, shielding shell and the division board, forms ejection of compact shielding groove between ejection of compact shield plate, shielding shell and the division board, first material passageway orientation of crossing the pan feeding shielding groove, the second material passageway orientation of crossing the ejection of compact shielding groove.

8. The shielding device for high-dose electron beam irradiation according to any one of claims 1 to 6, wherein:

pan feeding shield plate and ejection of compact shield plate all set up on the division board, and the pan feeding passageway is located pan feeding shield plate along the projection scope of irradiation direction at the opening of shield shell, and discharge channel is located ejection of compact shield plate along the projection scope of irradiation direction at the opening of shield shell, and first punishment in advance passageway orientation division board on pan feeding shield plate or pan feeding shield plate right side, the passageway orientation is punishment in advance to the second division board on ejection of compact shield plate or ejection of compact shield plate right side.

9. The shielding apparatus for high-dose electron beam irradiation according to claim 8, wherein:

the feeding channel and the discharging channel are obliquely arranged relative to the partition plate, and are configured to be gradually close to the partition plate along the electron beam irradiation direction.

Technical Field

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

In the process of electron beam irradiation processing, when an electron beam hits an irradiated object or hits the inner wall of a channel, x rays harmful to human bodies are generated in an irradiation area, the x rays belong to ionizing radiation, are different from visible light and ultraviolet light (UV) of non-ionizing radiation, have complex interaction with substances, and have the rules of reflection, transmission and the like at an interface. In a continuous production line, how to shield the x-rays generated by the irradiation area to a safe level is a primary safety problem in the design of the production line.

Electron beam irradiation apparatuses such as those described in CN1809496A and CN107971191A achieve radiation levels meeting national requirements by making x-rays generated from an irradiation surface to be emitted from an incoming and outgoing material through two reflections. However, for high-speed electron beam irradiation applications, higher beam intensity and irradiation dose are usually required, and radiation with certain intensity still exists in the input material and the output material after twice reflection. Meanwhile, the narrow channel is not beneficial to maintaining low oxygen concentration during electron beam irradiation under high-speed operation, and the length of the channel or the dosage of protective gas must be increased, so that the cost is increased.

Disclosure of Invention

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

The embodiment of the invention provides a shielding device suitable for high-dose electron beam irradiation, which comprises a closed shielding shell, wherein a cavity is arranged in the shielding shell, a central partition plate and a partition plate which are made of shielding materials are arranged on the inner wall of the shielding shell, the cavity is divided into an irradiation cavity and a material passing cavity by the central partition plate, the material passing cavity is positioned on the left side of the irradiation cavity, and the material passing cavity is divided into a material inlet cavity and a material outlet cavity by the partition plate; the outer surface of the shielding shell is provided with a feeding channel communicated with the feeding cavity and a discharging channel communicated with the discharging cavity, the central partition plate is provided with a first material passing channel communicated with the irradiation cavity and the feeding cavity respectively and a second material passing channel communicated with the irradiation cavity and the discharging cavity respectively, and the feeding cavity and the discharging cavity are both provided with first guide rollers; the irradiation cavity is provided with an electron beam accelerator, a beam absorption plate positioned on the left side of the electron accelerator, a beam lower shielding plate positioned on the left side of the beam absorption plate and two second guide rollers for tensioning coiled materials, the coiled materials between the two second guide rollers pass through the space between the electron accelerator and the beam absorption plate, the first material passing channel and the second material passing channel are both positioned on the left side of the beam lower shielding plate, and openings of the first material passing channel and the second material passing channel in the irradiation cavity are positioned in the projection range of the beam lower shielding plate along the irradiation direction; the first material passing channel and the second material passing channel are obliquely arranged relative to the central partition plate, a material feeding shielding plate for blocking rays emitted from the first material passing channel from emitting to the material feeding channel is arranged in the material feeding cavity, and a material discharging shielding plate for blocking rays emitted from the second material passing channel from emitting to the material discharging channel is arranged in the material discharging cavity; and inert gas inflation pipes are arranged in the feeding cavity, the irradiation cavity and the discharging cavity.

Preferably, the shielding shell includes right shielding sleeve, left shielding sleeve and is located the well shielding sleeve between right shielding sleeve and the left shielding sleeve, right shielding sleeve and left shielding sleeve all are connected with well shielding sleeve is detachable, the central authorities baffle is fixed on well shielding sleeve's the inner wall, pan feeding passageway and discharging channel all set up on left shielding sleeve.

Preferably, the terminal surface that right side shielding sleeve is close to well shielding sleeve is equipped with left slot, the terminal surface that left side shielding sleeve is close to well shielding sleeve is equipped with right slot, well shielding sleeve's both ends are inserted respectively in left slot and the right slot.

Preferably, the shielding shell is further provided with a guide rail below, the bottoms of the right shielding sleeve and the left shielding sleeve are further provided with rollers capable of moving along the guide rail, and the bottom of the middle shielding sleeve is provided with a fixing block fixed on the guide rail.

Preferably, the partition plate is fixed on the left shielding sleeve, a convex plate is arranged on the surface of one side, close to the left shielding sleeve, of the central partition plate, a clamping groove is formed in the convex plate, and the partition plate is detachably inserted into the clamping groove.

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 clamping grooves of the convex plates.

Preferably, pan feeding shield plate and ejection of compact shield plate all are located the inner wall of shielding shell, the pan feeding shield plate is located between pan feeding passageway and the division board, and ejection of compact shield plate is located between discharging channel and the division board, forms the pan feeding shielding groove between pan feeding shield plate, shielding shell and the division board, forms ejection of compact shielding groove between ejection of compact shield plate, shielding shell and the division board, first material passageway orientation of crossing the pan feeding shielding groove, the second material passageway orientation of crossing the ejection of compact shielding groove.

Preferably, pan feeding shield plate and ejection of compact shield plate all set up on the division board, and the pan feeding passageway is located the projection scope of pan feeding shield plate along the irradiation direction at the opening of shield shell, and the discharge channel is located ejection of compact shield plate along the projection scope of irradiation direction at the opening of shield shell, and first material passageway orientation of crossing the division board on pan feeding shield plate or pan feeding shield plate right side, the material passageway orientation is crossed to the second division board on ejection of compact shield plate or ejection of compact shield plate right side.

Preferably, the feeding channel and the discharging channel are both obliquely arranged relative to the partition plate, and the feeding channel and the discharging channel are configured to be gradually close to the partition plate along the electron beam irradiation direction.

The invention has the beneficial effects that: this application separates the irradiation space in the shield shell for a plurality of relatively independent cavitys, only communicates through corresponding passageway. After x-ray that produces in the irradiation zone is through the reflection several times, only can get into outlying income material chamber and ejection of compact chamber with the ray that the punishment in advance passageway keeps the same angle, consequently the ray intensity in income material chamber and ejection of compact chamber has been weakened, rethread income material shield plate and ejection of compact shield plate carry out secondary protection to income material passageway and discharge channel, make the ray need be through the multiple reflection once more just can follow the income material passageway and ejection of compact passageway and jet out, overall structure's shielding ability strengthens greatly. Meanwhile, the plurality of divided areas can form area gradients, so that the protective atmosphere of inert gas can be effectively maintained, and the gas interference caused by the coiled material running at high speed is reduced.

Drawings

FIG. 1 is a cross-sectional view of a high-dose electron beam radiation shielding apparatus according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of another embodiment of the high-dose electron beam irradiation shielding device according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

The embodiment of the invention provides a shielding device suitable for high-dose electron beam irradiation, which comprises a closed shielding shell 1, wherein the shielding shell 1 is made of shielding materials such as lead and the like, the shielding shell 1 can be integrally in a box structure, and a cavity for accommodating objects is arranged in the shielding shell 1. The inner wall of the shielding shell 1 is provided with a central partition plate 3 and a partition plate 4 which are made of lead and other shielding materials, the central partition plate 3 divides the cavity into two relatively independent irradiation cavities 120 and a material passing cavity, the material passing cavity is positioned on the left side of the irradiation cavities 120, the partition plate 4 divides the material passing cavity into a relatively independent feeding cavity 110 and a relatively independent discharging cavity 130, and the feeding cavity 110 and the discharging cavity 130 are both positioned on the left side of the irradiation cavities 120.

The outer surface of the shielding shell 1 is provided with a feeding channel 41 communicated with the feeding cavity 110 and a discharging channel 42 communicated with the discharging cavity 130, and the coiled material 100 enters the feeding cavity 110 from the feeding channel 41 and is finally output from the discharging channel 42. The central partition 3 is provided with a first material passing channel 31 respectively communicated with the irradiation cavity 120 and the feeding cavity 110 and a second material passing channel 32 respectively communicated with the irradiation cavity 120 and the discharging cavity 130, and the feeding cavity 110 and the discharging cavity 130 are both internally provided with first guide rollers 34 for the coiled material 100 to pass through the channel, but the coiled material 100 is not contacted with the inner wall of the channel.

An electron beam accelerator 21, a beam absorption plate 22 positioned on the left side of the electron accelerator 21, a lower beam shielding plate 23 positioned on the left side of the beam absorption plate 22, and two second guide rollers 24 are arranged in the irradiation cavity 120, the electron beam accelerator 21, the beam absorption plate 22, the lower beam shielding plate 23, and the two second guide rollers 24 can all 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 for generating an electron beam so as to irradiate the web 100 with the electron beam, the irradiation direction of which is also leftward. Two second guide rollers 24 may be respectively located at both ends of the beam absorbing plate 22, and the web 100 between the two second guide rollers 24 is located between the beam absorbing plate 22 and the electron beam accelerator 21. As shown in the figure, the web 100 enters from the feeding channel 41, passes through the first guide roller 34, enters the irradiation cavity 120 from the first material passing channel 31, passes through the two second guide rollers 24, enters the discharging cavity 130 from the second material passing channel 32, passes through the first guide roller 34, and finally is output from the discharging channel 42. The straightened web 100 may be perpendicular to the irradiation direction of the electron beam to enhance the electron beam irradiation effect on the surface of the web 100.

The under-beam shielding plate 23 is used for protecting openings of the first material passing channel 31 and the second material passing channel 32, and the openings of the first material passing channel 31 and the second material passing channel 32 in the irradiation cavity are located in a projection of the under-beam shielding plate 23 on the central partition plate 3, that is, the under-beam shielding plate 23 completely covers the first material passing channel 31 and the second material passing channel 32. The electron beam generated by the electron accelerator 21 is mainly irradiated on the coiled material 100 and the beam current absorption plate 22, and generates the strongest X-ray on the irradiated surface, and the existence of the lower beam shielding plate 23 prevents the part of the X-ray from directly entering the first material passing channel 31 and the second material passing channel 32. The first material passing channel 31 and the second material passing channel 32 are both disposed in an inclined manner with respect to the central partition plate 3, that is, the extending direction of the first material passing channel 31 and the extending direction of the second material passing channel 32 both form an acute angle with the central partition plate 3, as shown in the figure, the first material passing channel 31 and the second material passing channel 32 both extend toward the partition plate 4. Therefore, the ray in the irradiation cavity 120 needs to keep the same angle with the two material passing channels to enter the peripheral material inlet cavity 110 and the peripheral material outlet cavity 130, and the intensity of the ray reaching the material inlet cavity 110 and the material outlet cavity 130 is weakened. Meanwhile, a feeding shielding plate 51 used for blocking the rays emitted from the first material passing channel 31 from directly emitting to the feeding channel 41 is arranged in the feeding cavity 110, a discharging shielding plate 52 used for blocking the rays emitted from the second material passing channel 32 from directly emitting to the discharging channel 42 is arranged in the discharging cavity 120, the feeding shielding plate 51 and the discharging shielding plate 52 respectively play a role in secondary protection on the feeding channel 41 and the discharging channel 42, so that the rays can be emitted from the feeding channel 41 and the discharging channel 42 only after being reflected for multiple times, and the shielding capability of the whole structure is greatly enhanced. Inert gas inflation pipes are arranged in the feeding cavity 110, the irradiation cavity 120 and the discharging cavity 130, and respectively inflate inert gases such as nitrogen and the like into the three cavities to maintain a low-oxygen environment required by electron beam curing, wherein the feeding cavity 110 and the discharging cavity 130 can be filled with pure nitrogen with the purity of 99.99%, and the irradiation cavity 120 can be filled with high-purity nitrogen with the purity of 99.999%. The air volume charged into the irradiation cavity 120 is larger than that charged into the feeding cavity 110, and the air volume charged into the feeding cavity 110 is much larger than that charged into the discharging cavity 130. Due to the adoption of the channel type opening structure, less air is brought in from the material inlet channel 41, the material inlet cavity 110 and the material outlet cavity 130 play a role of transitional buffering, the air brought into the material inlet cavity 110 is diluted by the charged pure nitrogen, and less oxygen enters the irradiation cavity 120, so that the interference caused by the coiled material 100 running at high speed can be effectively responded, and the protective atmosphere of inert gas is maintained. Meanwhile, the length of the channel can be properly prolonged according to the running speed so as to achieve a better gas protection effect.

The term "orientation expression" used in the present invention does not mean an absolute orientation, but means a relative positional relationship between objects. As the "left side" of the above-mentioned embodiment does not indicate an absolute left side, those skilled in the art can put the shielding device at a plurality of angles as needed when using the shielding device suitable for high-dose electron beam irradiation described above, so that the electron beam irradiation direction has different orientations in the lateral direction.

In an embodiment, the structure of the shielding shell 1 will be described in detail, as shown in fig. 1, 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, which are shown in a cross-sectional view, the right shielding sleeve 11, the middle shielding sleeve 12, and the left shielding sleeve 13 may be square or circular sleeves, a right end of the right shielding sleeve 11 is closed, a left end of the left shielding sleeve has an opening, a left end of the left shielding sleeve 13 is closed, a right end of the right shielding sleeve has an opening, and both left and right ends of the middle shielding sleeve 12 may have openings to be respectively butted with 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 feeding channel 41 and the discharging channel 42 can be both arranged on the left side wall of the left shielding sleeve 13, the electron beam accelerator 21 can be positioned in the right shielding sleeve 11, and the beam absorption plate 22, the beam lower shielding plate 23 and the two second guide rollers 24 can be all fixed on the central partition 3 in the middle shielding sleeve 12 through supports. The right shielding sleeve 11 and the left shielding sleeve 13 are connected with the middle shielding sleeve 12 in a detachable connection mode, the right shielding sleeve 11, the middle shielding sleeve 12 and the left shielding sleeve 13 can be detached, the coiled material 100 can be conveniently fed, and a worker can pull the coiled material 100 to sequentially pass through each channel and each roller to complete feeding assembly. After the disassembly, the right shielding sleeve 11, the middle shielding sleeve 12 and the left shielding sleeve 13 can be quickly assembled into the complete shielding shell 1.

In an embodiment, a guide rail 101 is further disposed below the shielding shell 1, the guide rail 101 extends along the irradiation direction, rollers 102 capable of moving along the guide rail 101 are further disposed at bottoms of the right shielding sleeve 11 and the left shielding sleeve 13, a fixing block 103 fixed on the guide rail 101 is disposed at a bottom of the middle shielding sleeve 12, so that the middle shielding sleeve 12 can not move relative to the guide rail 101, the right shielding sleeve 11 and the left shielding sleeve 13 at two sides are convenient 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 rapidly separated from each other or combined into the complete shielding shell 1.

In an embodiment, a specific detachable connection manner is provided, as shown in fig. 1, a left end face of the right shielding sleeve 11 is provided with a slot 111, a right end face of the left shielding sleeve 12 is also provided with a slot 111, the left end and the right end 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, a plug-in detachable connection is adopted, and meanwhile, a radiation-resistant sealing strip is arranged in the slot 111 to ensure air tightness in the shielding shell 1.

For the detachable structure, the partition plate 4 is fixed on the inner wall of the left shielding sleeve 13, the surface of the central partition plate 3 is provided with a convex plate 33, the convex plate 33 is provided with a clamping groove, and the partition plate 4 is detachably inserted into the clamping groove. Because well shielding sleeve 12 and left shielding sleeve 13 are detachable to be connected, the division board 4 that corresponds also is detachable to be connected with central baffle 3, and the draw-in groove on the convex plate 33 plays sealed effect, also can set up resistant radiation sealing strip in the draw-in groove to the circulation of gas between isolated material chamber 110 and ejection of compact chamber 130.

On the basis of the above embodiment, an implementation manner of the feeding shielding plate 51 and the discharging shielding plate 52 is provided, as shown in fig. 1, the feeding shielding plate 51 and the discharging shielding plate 52 are both located on the inner wall of the shielding shell 1 and fixed on the inner wall of the bottom of the left shielding sleeve 13, and both the two shielding plates are parallel to the partition plate 4, and the feeding channel 41 and the discharging channel 42 are both located on the inner wall of the left side of the left shielding sleeve 13. Pan feeding shield plate 51 is located between pan feeding passageway 41 and division board 4, ejection of compact shield plate 52 is located between 4 between discharging channel 42 and the division board, interval certain distance between pan feeding shield plate 51 and the division board 4, thereby form pan feeding shielding groove between the two, interval certain distance between ejection of compact shield plate 52 and the division board 4, thereby form ejection of compact shielding groove between the two, the extending direction of first material passageway 31 of crossing is towards pan feeding shielding groove, the extending direction of second material passageway 32 is towards ejection of compact shielding groove. Therefore, the rays emitted from the first material passing channel 31 and the second material passing channel 32 are injected into the shielding groove, and can be reflected from the shielding groove through multiple reflections of the shielding groove, so that the intensity of the rays is reduced.

In this structure, pan feeding passageway 41 and discharging channel 42 also all set up for division board 4 slope, and the extension line on pan feeding passageway 41 and discharging channel 42 right side will be close to corresponding shield plate, and the ray through the reflection is difficult more to be jetted out from pan feeding passageway 41 and discharging channel 42, has further strengthened shielding effect.

On the basis of the above embodiment, another embodiment of the feeding shielding plate 51 and the discharging shielding plate 52 is provided, as shown in fig. 2, the feeding shielding plate 51 and the discharging shielding plate 52 are both disposed on the partition plate 4, the opening of the feeding channel 41 in the shielding shell 1 is located in the projection of the feeding shielding plate 51 on the shielding shell 1, the opening of the discharging channel 42 in the shielding shell 1 is located in the projection of the discharging shielding plate 52 on the shielding shell 1, and the first material passing channel 31 and the second material passing channel 32 are both configured to gradually approach the partition plate 4 along the electron beam irradiation direction. The first material passing channel 31 faces the material feeding shielding plate 51 or the partition plate 4 on the right side of the material feeding shielding plate 51, the second material passing channel 32 faces the material discharging shielding plate 52 or the partition plate 4 on the right side of the material discharging shielding plate 52, and rays emitted from the first material passing channel 31 and the second material passing channel 32 are blocked by the shielding plates which are vertically arranged.

As shown in FIG. 2, two first guide rollers 34 are provided in the inlet chamber 110 and two first guide rollers 34 are provided in the outlet chamber 130. In the material inlet cavity 110, one first guide roller 34 is positioned at the right side of the material inlet shielding plate 51, the other first guide roller 34 is positioned at the end part of the material inlet shielding plate 51, and in the material outlet cavity 130, one first guide roller 34 is positioned at the right side of the material outlet shielding plate 52, and the other first guide roller 34 is positioned at the end part of the material outlet shielding plate 52. The feeding channel 41 and the discharging channel 42 are both obliquely arranged relative to the partition plate 4, and the feeding channel 41 and the discharging channel 42 are both configured to gradually approach the partition plate 4 along the electron beam irradiation direction. The two first guide rollers 34 change the transfer direction of the web 100 twice to bypass the in-feed shield 51 and the out-feed shield 52.

The feeding channel 41, the discharging channel 42, the first material passing channel 31 and the second material passing channel 32 of the above embodiments have height-adjustable structures, and are used for adjusting the height of the channels when the roll 100 is loaded so as to perform a film-passing operation. After the membrane penetrating is finished, the height of the channel is adjusted to be minimum on the premise that the system normally runs without scraping the membrane, and the structure is mature in design and is not described any more.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.