CN113470860A

CN113470860A - Irradiation sterilization system

Info

Publication number: CN113470860A
Application number: CN202110786850.9A
Authority: CN
Inventors: 吕约澎; 崔爱军; 朱志斌; 张立锋; 窦玉玲; 杨誉
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-10-01

Abstract

The embodiment of the invention discloses an irradiation sterilization system, which comprises: the shielding device (100) is internally provided with a channel (101), and the channel (101) is in a shape of a Chinese character 'ji'; -a transmission device (200) arranged inside said shielding device (100) along said passage (101); an accelerator disposed on the channel (101) for generating an electron beam for irradiation sterilization; wherein the shielding device (100) is used for shielding the electron beam. By adopting the shielding device in the embodiment of the invention, the electron beam generated by the accelerator can be effectively shielded, and the radiation protection safety of operators can be effectively protected while the requirements of the cold-chain cargo irradiation sterilization process are ensured.

Description

Irradiation sterilization system

Technical Field

The embodiment of the invention relates to the technical field of irradiation treatment, in particular to an irradiation sterilization system.

Background

With the economic globalization, the cross-border spread of harmful organisms is a problem to be solved by the goods in and out.

At present, most of sterilization modes of imported cold chain goods adopt chemical methods, the chemical sterilization methods have certain limitations, only viruses remained on the outer surface of a goods packaging box can be effectively killed, but the viruses on the surfaces of the goods and the inner surface of the packaging box are difficult to kill.

Disclosure of Invention

There is provided, in accordance with an embodiment of the present invention, an irradiation sterilization system including: the shielding device is internally provided with a channel which is in a shape of Chinese character 'ji'; a transmission device arranged in the shielding device along the channel; the accelerator is arranged on the channel and used for generating electron beams for irradiation sterilization; wherein the shielding device is used for shielding the electron beam.

In some embodiments, the shielding apparatus comprises: a first shield assembly and a second shield assembly that combine to form the hex-shaped channel of a predetermined width.

In some embodiments, the first shielding assembly is in the shape of an inverted U; the second shielding assembly is U-shaped; one U-shaped side of the first shielding assembly is partially inserted into the U-shaped opening of the second shielding assembly and one U-shaped side of the second shielding assembly is partially inserted into the U-shaped opening of the first shielding assembly.

In some embodiments, the other U-shaped side of the first shielding assembly is vertically provided with a first shielding body, and the first shielding body is located inside the U-shaped first shielding assembly.

In some embodiments, the one U-shaped side of the second shielding assembly is vertically provided with a fifth shielding body and a sixth shielding body, and the fifth shielding body and the sixth shielding body are respectively located at two sides of the first shielding body.

In some embodiments, the other U-shaped side of the second shielding assembly is vertically provided with a fourth shielding body, and the fourth shielding body is positioned inside the U-shaped second shielding assembly.

In some embodiments, the one U-shaped side of the first shielding assembly is vertically provided with a second shielding body and a third shielding body, and the second shielding body and the third shielding body are respectively located at two sides of the fourth shielding body.

In some embodiments, the accelerator comprises: and the first accelerator is arranged on a channel between the bottom edge of the U shape of the first shielding assembly and the fifth shielding body and is used for generating electron beams from top to bottom.

In some embodiments, the accelerator further comprises: and the second accelerator is arranged at the central position in the shielding device and is used for generating the electron beam from bottom to top.

In some embodiments, the second accelerator is disposed in the channel between the one U-shaped side of the first shield assembly and the one U-shaped side of the second shield assembly.

In some embodiments, the thickness of the first shield assembly decreases as the distance between the first shield assembly and the accelerator increases; and/or the thickness of the second shielding assembly decreases as the distance between the second shielding assembly and the accelerator increases.

In some embodiments, the shielding device is quadrilateral, and the shielding device further has an inlet and an outlet, which are respectively disposed at two opposite corners of the shielding device.

In some embodiments, further comprising: a power source disposed within the shielding device for generating microwave power and providing it to the accelerator.

In some embodiments, further comprising: and the control device is arranged in the shielding device and used for controlling at least one of the transmission device, the accelerator and the power source.

In some embodiments, the power source and/or the control device is embedded in a shield of the shielding device.

Drawings

Other objects and advantages of the present invention will become apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, and may help to provide a full understanding of the present invention.

FIG. 1 is a schematic diagram of a radiation sterilization system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a shielding device according to one embodiment of the present invention;

fig. 3 is a schematic structural view of a shielding apparatus according to another embodiment of the present invention.

It is noted that the drawings are not necessarily to scale and are merely illustrative in nature and not intended to obscure the reader.

Description of reference numerals:

100. a shielding device; 101. a channel; 102. an inlet; 103. an outlet;

110. a first shielding assembly; 111. a U-shaped side; 112. a U-shaped side;

130. a first shield; 140. a second shield; 150. a third shield;

120. a second composite shield; 121. a U-shaped side; 122. a U-shaped side;

160. a fourth shield; 170. a fifth shield; 180. a sixth shield;

200. a transmission device; 310. a first accelerator; 320. a second accelerator; 400. an irradiated object; 500. a power source; 600. a control device; 700. a non-irradiated object storage area; 800. an irradiated material storage area.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined. If the description "first", "second", etc. is referred to throughout, the description of "first", "second", etc. is used only for distinguishing similar objects, and is not to be construed as indicating or implying a relative importance, order or number of technical features indicated, it being understood that the data described in "first", "second", etc. may be interchanged where appropriate. If "and/or" is presented throughout, it is meant to include three juxtapositions, exemplified by "A and/or B" and including either scheme A, or scheme B, or schemes in which both A and B are satisfied. Furthermore, spatially relative terms, such as "above," "below," "top," "bottom," and the like, may be used herein for ease of description to describe one element or feature's spatial relationship to another element or feature as illustrated in the figures, and should be understood to encompass different orientations in use or operation in addition to the orientation depicted in the figures.

In order to block the way that the virus is transmitted along with the cold chain way, the irradiation sterilization system can be used for carrying out irradiation sterilization on the cold chain packing box, the electron beam irradiation sterilization has the characteristics of strong penetrability, uniform and thorough sterilization and high treatment speed, can treat hermetically packed articles, and has the advantages of simple and convenient operation, no residual poison, safety and sanitation. Based on the advantage and the characteristic of electronic irradiation sterilization, the irradiation sterilization treatment of imported cold chain goods can effectively prevent the propagation of viruses and ensure the safety of domestic circulation of the cold chain goods. The radiation sterilization system and the shielding device 100 for the radiation sterilization system of the present invention will be described with reference to specific embodiments. The irradiated object 400 may be a cold chain packing box, or may be other objects requiring irradiation.

Fig. 1 shows a schematic structural diagram of a radiation sterilization system according to an embodiment of the present invention. As shown in fig. 1, the radiation sterilization system of the present embodiment includes a shielding apparatus 100, a transport apparatus 200, and an accelerator. Wherein, a channel 101 is formed in the shielding device 100, and the channel 101 is in a shape of a Chinese character 'ji'.

In particular, the shielding device 100 may be a quadrilateral, and the shielding device further has an inlet 102 and an outlet 103, wherein the inlet 102 and the outlet 103 are respectively disposed at two opposite corners of the shielding device 100. For example, the inlet 102 and the outlet 103 may be disposed at two opposite corners along a diagonal of the shielding device 100.

A transmission device 200 disposed within the shielding device 100 along the passageway 101. The transfer device 200 can transfer the irradiation object 400 in one direction from the inlet 102 to the outlet 103. The irradiation object 400 enters the shielding device 100 through the inlet 102 and is output to the outside of the shielding device 100 from the outlet 103.

As shown in fig. 1, the exterior of the inlet 102 may be an unirradiated deposit area 700 and the exterior of the outlet 103 may be an irradiated deposit area 800. In the embodiment, the inlet 102 and the outlet 103 are arranged at different orientations of the shielding device 100, so that the unirradiated objects and the irradiated objects are respectively arranged at different orientations of the shielding device 100, confusion of the unirradiated objects and the irradiated objects can be prevented, and guarantee is provided for preventing secondary pollution of cold chain goods.

The accelerator is arranged on the channel 101 and used for generating an electron beam for irradiation sterilization, wherein the shielding device 100 can shield the electron beam, reduce the radiation dose of the electron beam outside the shielding device 100, and ensure the radiation safety of operators. Specifically, the accelerators include a first accelerator 310 and a second accelerator 320, which are located at different positions in the shielding device 100 and are used for irradiating different surfaces of the irradiation object 400 from different directions, so as to achieve irradiation sterilization of different surfaces after the irradiation object 400 passes through the channel 101 once. For example, the first accelerator 310 may generate a top-down electron beam irradiating the irradiation object 400, and the second accelerator 320 may generate a bottom-up electron beam irradiating the irradiation object 400.

In some embodiments, the first accelerator 310 and the second accelerator 320 may irradiate three surfaces of the irradiation object 400. For example, the electron beam generated by the first accelerator 310 irradiates the top surface and two opposite side surfaces of the object 400, wherein the two opposite side surfaces are substantially parallel to the extending direction of the channel 101, and optionally, the two opposite side surfaces may be substantially perpendicular to the extending direction of the channel 101. The electron beam generated by the second accelerator 320 irradiates the bottom surface and the other two opposite side surfaces of the irradiation object 400.

With the accelerator of this embodiment, three surfaces of the irradiation object 400 can be irradiated and sterilized. The first accelerator and the second accelerator respectively irradiate three different surfaces of the irradiated object 400 from different directions, so that the irradiated object 400 can realize irradiation sterilization of all six surfaces through the channel 101 at one time, and the irradiation sterilization treatment of cold chain cargos can be efficiently realized.

Fig. 2 shows a schematic structural diagram of a shielding device for a radiation sterilization system according to an embodiment of the present invention.

As shown in fig. 2, the shielding apparatus 100 of the present embodiment includes a first shielding assembly 110 and a second shielding assembly 120, and the first shielding assembly 110 and the second shielding assembly 120 are combined to form the "hex" shaped channel 101 with a predetermined width. The predetermined width may be determined according to the width of the transmission device 200. For example, the predetermined width may be slightly larger than the width of the transporting device 200 so that the transporting device 200 can smoothly run in the passage 101.

In some embodiments, the first shielding assembly 110 has an inverted U-shape, and the second shielding assembly 120 has a U-shape. One U-shaped side 111 of the first shielding assembly 110 is partially inserted into the U-shaped opening of the second shielding assembly 120, and one U-shaped side 121 of the second shielding assembly 120 is partially inserted into the U-shaped opening of the first shielding assembly 110, thereby forming a channel 101 shaped like a Chinese character 'ji'.

In some embodiments, the other U-shaped side 112 of the first shielding assembly 110 is vertically disposed with the first shielding body 130, i.e., the first shielding body 130 is perpendicular to the U-shaped side 112. And the first shield 130 is located inside the U-shaped first shield assembly 110. As shown in fig. 2, the first shielding body 130 is disposed opposite to the entrance 102, which can reduce the radiation dose of the electron beam generated by the accelerator at the entrance 102, and ensure the radiation safety of the operator.

Further, the one U-shaped side 121 of the second shielding assembly 120 is vertically provided with a fifth shielding body 170 and a sixth shielding body 180, that is, the fifth shielding body 170 and the sixth shielding body 180 are perpendicular to the U-shaped side 121. And the fifth shield 170 and the sixth shield 180 are respectively positioned at both sides of the first shield 130. For example, the fifth shield 170 may be disposed on one side of the first shield 130 near the inlet 102, and the sixth shield may be disposed on the other side of the first shield 130.

By providing the first shield 130, the fifth shield 170, and the sixth shield 180, the passageway 101 can be made to have a serpentine path near the entrance 102, allowing the electron beam produced by the accelerator to be attenuated by multiple passes through these shields, further reducing the radiation dose at the entrance 102.

Similarly, as shown in fig. 2, the other U-shaped side 122 of the second shielding assembly 120 may also be vertically provided with a fourth shielding body 160, that is, the fourth shielding body 160 is perpendicular to the U-shaped side 122. And the fourth shield 160 is located inside the U-shaped second shield assembly 120.

Further, the one U-shaped side 111 of the first shielding assembly 110 is vertically provided with a second shielding body 140 and a third shielding body 150, that is, the second shielding body 140 and the third shielding body 150 are perpendicular to the U-shaped side 111. And, the second shield 140 and the third shield 150 are respectively located at both sides of the fourth shield 160. For example, the second shield 140 may be disposed on one side of the fourth shield 160 near the outlet 103, and the third shield 150 may be disposed on the other side of the fourth shield 160.

By providing the second shield 140, the third shield 150 and the fourth shield 160, the passageway 101 may also have a serpentine path near the exit 103, allowing the electron beam produced by the accelerator to be attenuated by multiple passes through the shields, further reducing the radiation dose at the exit 103.

In some embodiments, the first accelerator 310 may be disposed on a channel between the bottom side of the U-shape of the first shielding assembly 110 and the fifth shielding body 170, for generating an electron beam from top to bottom to sterilize three surfaces of the irradiation object 400. As shown in fig. 2, with the above arrangement, the shielding body on one side of the first accelerator 310 is in a U-shaped structure, which can increase the reflection times of the electron beams generated by the shielding body, ensure that the electron beams can reach the outside of the shielding device 100 after being attenuated by multiple reflections, and reduce the radiation dose at the entrance and exit positions of the shielding device.

As shown in fig. 2, the second accelerator 320 may be disposed at a central position within the shielding apparatus 100 for generating a bottom-up electron beam to perform radiation sterilization on the remaining three surfaces of the irradiation object 400. Specifically, as shown in fig. 2, the second accelerator 320 may be disposed in a channel between the one U-shaped side 111 of the first shielding assembly 110 and the one U-shaped side 211 of the second shielding assembly 120, so that the shielding bodies on both sides of the second accelerator 320 are both U-shaped structures, which may increase the reflection times of the electron beams generated by the shielding bodies, ensure that the electron beams at different positions reach the outside of the shielding device 100 after being attenuated by at least four reflections, and reduce the radiation dose at the entrance and exit positions of the shielding device.

In some embodiments, the thickness of the first shielding assembly 110 decreases as the distance between the first shielding assembly 110 and the accelerator increases, and/or the thickness of the second shielding assembly 120 decreases as the distance between the second shielding assembly 120 and the accelerator increases. On the premise of ensuring the effective protection of the shielding device, the occupied area of the shielding device and the construction cost of the shielding device can be effectively reduced.

Optionally, the height of the shielding device 100 is set to accommodate an operator, so that the operator can enter the passage 101 of the shielding device 100, and thus, the operator can perform operations such as maintenance, replacement, etc. on each device or component, etc. arranged in the shielding device 100.

As shown in fig. 1, the radiation sterilization system in this embodiment may further include a power source 500, where the power source 500 is disposed in the shielding device 100, and is used for generating microwave power and providing the microwave power to the accelerator.

Furthermore, the radiation sterilization system may further comprise a control device 600, disposed in the shielding device 100, for controlling at least one of the transmission device 200, the accelerator, and the power source 500.

In some embodiments, the power source 500 and/or the control device 600 may be embedded in a shield of the shielding device 100, so as to reduce the influence of the radiation of the electron beam on the power source 500 and/or the control device 600, and enable the power source 500 and/or the control device 600 to operate normally.

Fig. 3 illustrates a schematic view of a shielding device according to another embodiment of the present invention. As shown in fig. 3, in the present embodiment, each of the first shielding assembly 110 and the second shielding assembly 120 includes 8 shielding bodies with different thicknesses.

Specifically, the first shielding assembly 110 may include: shield 11, shield 12, shield 13 … … shield 18. The shielding body 14 is U-shaped, the shielding body 13 and the shielding body 11 are sequentially connected to one end of the shielding body 14 along the opening direction of the shielding body 14, and the shielding body 11 is located at the inlet 102. The shield 12 is vertically connected to one end of the shield 13 close to the shield 11, and the shield 15 and the shield 18 are respectively connected to the other end of the shield 14 and are perpendicular to the shield 11. The shielding body 16 is 7-shaped, and forms a rectangular accommodating space with the shielding body 15, which can be used for accommodating the control device 600. The shield 17 is connected at right angles to the shield 16 and parallel to the shield 15, the shield 17 being located at the outlet 103.

The second shielding assembly 120 may include: shield 21, shield 22 … … shield 28. Wherein the shield 21 is located at the outlet 103 and parallel to the shield 17. The shielding body 23 is connected to the shielding body 21 along the length direction, the shielding body 22 is vertically connected to one end of the shielding body 23 close to the shielding body 21, and the shielding body 24 is vertically connected to the other end of the shielding body 23. The shielding body 25 is 7-shaped, and one end of the shielding body 25 is perpendicularly connected to the end of the shielding body 24 away from the shielding body 23 and the shielding body 26. The shield 27 is perpendicularly connected to the other end of the shield 25, the shield 28 is perpendicularly connected to the shield 27, and the shield 25, the shield 27 and the shield 28 may enclose a rectangular accommodating space for accommodating the power source 500.

In some embodiments, the first accelerator 310 may be located between the shield 14 and the shield 25, which may generate a top-down electron beam for irradiating three sides of the irradiation object 400. The second accelerator 320 may be located between the shield 14 and the shield 25, and may generate a bottom-up electron beam for irradiating the other three sides of the irradiation object 400. In this embodiment, the shields disposed on both sides of the second accelerator 320 are U-shaped, the U-shaped shield on one side is composed of the

shields

22, 23, and 24, and the U-shaped shield on the other side is composed of the

shields

12, 13, and 14. The U-shaped shielding body structure can increase the reflection times of electron beams, and ensure that electron beam lines at different positions can reach the outside of the shielding device after being reflected and attenuated for at least four times, so that the radiation dose at the inlet and outlet positions of the shielding device is reduced, and the radiation safety of operators is ensured.

By adopting the shielding device in the embodiment of the invention, the electron beams generated by the two accelerators can be effectively shielded, and the radiation protection safety of operators can be effectively protected while the requirements of the cold-chain cargo irradiation sterilization process are ensured.

It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.

Claims

1. An irradiation sterilization system, comprising:

the shielding device (100) is internally provided with a channel (101), and the channel (101) is in a shape of a Chinese character 'ji';

-a transmission device (200) arranged inside said shielding device (100) along said passage (101);

an accelerator disposed on the channel (101) for generating an electron beam for irradiation sterilization; wherein the shielding device (100) is used for shielding the electron beam.

2. The system according to claim 1, characterized in that said shielding means (100) comprise:

a first shielding combination (110) and a second shielding combination (120), the first shielding combination (110) and the second shielding combination (120) combining to form the hex-shaped channel (101) of a predetermined width.

3. The system of claim 2,

the first shielding combination body (110) is in an inverted U shape;

the second shielding assembly (120) is U-shaped;

one U-shaped side of the first shielding assembly (110) is partially inserted into the U-shaped opening of the second shielding assembly (120), and one U-shaped side of the second shielding assembly (120) is partially inserted into the U-shaped opening of the first shielding assembly (110).

4. A system according to claim 3, characterized in that the other U-shaped side of the first shielding assembly (110) is vertically provided with a first shielding (111), the first shielding (130) being located inside the U-shaped first shielding assembly (110).

5. The system of claim 4, wherein said one U-shaped side of said second shielding assembly (120) is vertically provided with a fifth shield (170) and a sixth shield (180), said fifth shield (170) and sixth shield (180) being located on either side of said first shield (130).

6. The system of claim 3, wherein the other U-shaped side of the second shielding assembly (120) is vertically provided with a fourth shielding body (160), and the fourth shielding body (160) is located inside the U-shaped second shielding assembly (120).

7. The system of claim 6, wherein the one U-shaped side of the first shielding assembly (110) is vertically provided with a second shielding body (140) and a third shielding body (150), and the second shielding body (140) and the third shielding body (150) are respectively located at two sides of the fourth shielding body (160).

8. The system of claim 1, wherein the accelerator comprises:

and the first accelerator (310) is arranged on a channel between the bottom edge of the U-shape of the first shielding assembly (110) and the fifth shielding body (170) and is used for generating an electron beam from top to bottom.

9. The system of claim 8, wherein the accelerator further comprises:

and a second accelerator (320) disposed at a central position within the shielding device (100) for generating a bottom-up electron beam.

10. The system of claim 9, wherein the second accelerator (320) is disposed in a channel between the one U-shaped side of the first shielding assembly (110) and the one U-shaped side of the second shielding assembly (120).

11. The system of any of claims 2-9, wherein a thickness of the first shielding assembly (110) decreases as a distance between the first shielding assembly (110) and the accelerator increases;

and/or the thickness of the second shielding assembly (120) decreases with increasing distance between the second shielding assembly (120) and the accelerator.

12. The system according to claim 1, characterized in that said shielding means (100) are quadrangular,

the shielding device (100) further comprises an inlet (102) and an outlet (103), wherein the inlet (102) and the outlet (103) are respectively arranged at two opposite corners of the shielding device (100).

13. The system of claim 1, further comprising:

a power source (500), said power source (500) being disposed within said shielding device (100) for generating microwave power and providing it to said accelerator.

14. The system of claim 1, further comprising:

a control device (600) disposed within the shielding device (100) for controlling at least one of the transmission device (200), the accelerator, and the power source (500).

15. The system of claim 13 or 14,

the power source (500) and/or the control device (600) are embedded in a shield of the shielding device (100).