Shielding device and electron irradiation sterilization system

Abstract

The invention discloses a shielding device and an electron irradiation sterilization system. The shielding device is used for the accelerator and comprises a first shielding body, one side face of the first shielding body faces an irradiation area, and the irradiation area is an area irradiated by the accelerator; the air duct system comprises a gas collection port and a gas exhaust port, an opening of the gas collection port is arranged towards the irradiation area, and gas generated by irradiation of the accelerator enters through the gas collection port and is exhausted out of the shielding device through the gas exhaust port; and the gas detection device is located at the position far away from the gas collection opening and used for detecting gas in the air duct system. The gas detection device is located at the position far away from the gas collection opening, the opening of the gas collection opening faces the irradiation area, and the gas detection device is far away from the gas collection opening, namely the irradiation area, so that irradiation of an accelerator and signal interference of electron beams can be avoided, and an accurate detection result can be obtained.

Description

Technical Field

[0001] The present application relates to the field of electron radiation sterilization, and in particular to a shielding device and an electron radiation sterilization system. Background Art

[0002] At present, electron irradiation accelerators have been widely used in irradiation sterilization, food preservation, material modification and other processing fields. They have outstanding irradiation sterilization effects and high processing efficiency. In recent years, irradiation accelerators have entered the market as high-end scientific and technological products. With the market popularization of industrial electron irradiation accelerators, intelligent monitoring and control of the accelerator working environment are particularly important. In particular, online detection of the gas under the electron irradiation accelerator beam is of great significance to the safe operation of the accelerator. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides a shielding device that can avoid signal interference of electron irradiation and electron beam and thus detect gas in the environment, and an electron irradiation sterilization system having the shielding device.

[0004] This application is implemented through the following technical solutions.

[0005] The first aspect of the present application provides a shielding device for shielding the electron beam of an accelerator, comprising: a first shielding body, one side of which faces an irradiation area, and the irradiation area is the area where the accelerator performs irradiation; an air duct system, comprising a gas collecting port and a gas exhaust port, the opening of the gas collecting port is arranged toward the irradiation area, and the gas generated by the irradiation of the accelerator enters through the gas collecting port and is discharged outside the shielding device through the gas exhaust port; and a gas detection device, located at a position away from the gas collecting port, and the gas detection device is used to detect the gas in the air duct system.

[0006] In the present application, the gas generated by the accelerator during irradiation can be discharged outside the shielding device through the setting of the air duct system. However, there are still some gases in the irradiation area and the air duct system, and these gases are the ambient gases inside the shielding device. The gas detection device is located away from the gas collection port, and the opening of the gas collection port is set toward the irradiation area. The gas detection device is away from the gas collection port, that is, away from the irradiation area, which can avoid the irradiation of the accelerator and the signal interference of the electron beam, so that accurate detection results can be obtained.

[0007] In some embodiments of the present application, the gas collection port includes a first gas collection port and a second gas collection port; the air duct system includes a first air duct and a second air duct, the first air duct is used to discharge gas, and the second air duct is used to detect gas, the first gas collection port and the gas exhaust port are respectively located at two ends of the first air duct, the second gas collection port is located at one end of the second air duct, and the other end of the second air duct is connected to the first air duct, wherein the gas detection device is used to detect the gas in the second air duct.

[0008] Two air ducts and two gas collecting ports are arranged, and the two gas collecting ports are distributed at different positions. Both air ducts can be used to collect and discharge gas.

[0009] The gas detection device can be used to detect the ambient gas in the first air duct.

[0010] The gas detection device can be used to detect the ambient gas in the second air duct.

[0011] There can be multiple gas detection devices, and the multiple gas detection devices can be used to detect the ambient gas in the two air ducts respectively.

[0012] When multiple gas detection devices detect the ambient gas in the first air duct and the second air duct respectively, numerical calibration can be performed based on comparative analysis of the ambient gas conditions in the two air ducts detected, or the gas conditions in the two air ducts detected can be integrated based on comparative analysis to obtain more accurate gas conditions.

[0013] In some embodiments of the present application, along the irradiation direction of the accelerator, at least a portion of the first shielding body is located between the accelerator and the gas detection device.

[0014] Therefore, the gas detection device can perform gas detection while avoiding electron irradiation and signal interference of the electron beam, so as to obtain more accurate environmental gas conditions.

[0015] In some embodiments of the present application, the first side of the first shielding body faces the irradiation area, the first end of the first side has a protrusion, the second air duct bypasses the protrusion and extends in a direction away from the protrusion, and the gas detection device is used to detect gas in the second air duct at a position away from the protrusion in the gas flow direction.

[0016] The first end of the first side has a protrusion, and the setting of the protrusion can shield the radiation of the accelerator from the area outside the first side of the first shielding body. Therefore, the part of the second air duct that bypasses the protrusion can avoid electron irradiation and signal interference of the electron beam, and the gas detection device is arranged at a position of the second air duct away from the protrusion in the gas flow direction, so that the detection of the gas detection device can avoid electron irradiation and signal interference of the electron beam.

[0017] In some embodiments of the present application, the first shielding body includes a second side opposite to the first side, and a third side located between the first side and the second side; the second air duct includes a first part and a second part connected to each other, the second gas collection port is located in the first part, the first part extends along the first side, and the second part extends along the third side.

[0018] The third side and the first side are located in different planes, and the third side, the irradiation area and the accelerator are located in different spaces. The gas detection device is arranged in the second part located on the third side, so that the detection of the gas detection device can avoid signal interference from electron irradiation and electron beam.

[0019] In some embodiments of the present application, the shielding device includes a gas detection device, which is used to detect the gas in the second part of the second air duct; or, the shielding device includes the gas detection device, the second air duct also includes a third part connected to the second part, the third part extends along the second side, and the gas detection device is used to detect the gas in the third part of the second air duct.

[0020] In some embodiments of the present application, the shielding device includes a fan, which is disposed in the second air duct, and is used to make the gas flow along the second air duct to the first air duct.

[0021] The fan can be used to absorb gas into the second air duct so that the gas detection device can detect the gas. The fan is arranged in the second part of the second air duct and can absorb gas into the second part so that the gas in the second air duct flows to the first air duct and then flows out through the first air duct.

[0022] The fan is arranged in the third part of the second air duct and can absorb the gas into the third part, so as to facilitate the gas detection by the gas detection device arranged in the third part.

[0023] In some embodiments of the present application, the gas detection device includes an ozone detection device and a smoke detection device.

[0024] An ozone detection device can detect ozone, and a smoke detection device can detect smoke.

[0025] A second aspect of the present application provides an electron irradiation sterilization system, comprising: an accelerator for irradiating an object to be irradiated; and a shielding device as in the first aspect, wherein the accelerator is disposed close to the first side.

[0026] The electron irradiation sterilization system includes an accelerator and a shielding device as in the first aspect. The gas generated by the irradiation of the accelerator can be discharged outside the shielding device through the setting of the air duct system. However, there are still some gases in the irradiation area and the air duct system, and these gases are the environmental gases inside the shielding device. The gas detection device is located inside the air duct system and away from the gas collection port. The opening of the gas collection port is set toward the irradiation area. The gas detection device is away from the gas collection port, that is, away from the irradiation area, which can avoid the irradiation of the accelerator and the signal interference of the electron beam, so that accurate detection results can be obtained.

[0027] In some embodiments of the present application, the electron irradiation sterilization system further includes a control module, which is respectively connected to the gas detection device and the accelerator signal, and the control module adjusts the operation of the accelerator according to the detection information of the gas detection device.

[0028] Therefore, the present application can realize interlocking control between the gas detection device and the accelerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0030] Figure 1 A schematic diagram of the structure of a shielding device provided in some embodiments of the present application;

[0031] Figure 2 A schematic diagram of the structure of the air duct system provided in some embodiments of the present application;

[0032] Figure 3 A schematic diagram of the structure of a shielding device provided in some other embodiments of the present application.

[0033] Description of Reference Numerals

[0034] 1. Shielding device; 10. Shielding body; 100. Transmission channel; 101. Inlet; 102. Outlet; 110. First shielding body; 120. Second shielding body; 111. First side; 1110. Protrusion; 1111. First component; 1112. Second component; 1113. Third component; 112. Second side; 113. Third side; 20. Air duct system; 201. First gas collecting port; 202. First air duct; 203. Gas exhaust port; 204. Second gas collecting port; 205. Second air duct; 251. First part; 2511. Parallel part; 2522. Bend part; 252. Second part; 253. Third part; 206. Fan; 207. Ozone detection device; 208. Smoke detection device; 209. Fourth part. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0036] At present, electron irradiation accelerators have been widely used in irradiation sterilization, food preservation, material modification and other processing fields. They have outstanding irradiation sterilization effects and high processing efficiency. In recent years, irradiation accelerators have entered the market as high-end scientific and technological products. With the market popularization of industrial electron irradiation accelerators, intelligent monitoring and control of the accelerator working environment are particularly important. In particular, online detection of the gas under the electron irradiation accelerator beam is of great significance to the safe operation of the accelerator.

[0037] Due to electron beam irradiation and interference of electron beam on control signal, it is difficult to monitor ozone and smoke concentration in electron beam irradiation area. In view of this technical difficulty, this patent proposes a method for monitoring the environment under electron irradiation accelerator beam, which can effectively solve this problem.

[0038] In order to solve the above technical problems, the present application provides a shielding device that can avoid signal interference of electron irradiation and electron beam and thus detect gas in the environment, and an electron irradiation sterilization system having the shielding device.

[0039] A shielding device provided in the present application is used for an accelerator, comprising: a first shielding body, one side of which faces an irradiation area, and the irradiation area is the area where the accelerator performs irradiation; an air duct system, comprising a gas collecting port and a gas exhaust port, the opening of the gas collecting port is arranged toward the irradiation area, and the gas generated by the irradiation of the accelerator enters through the gas collecting port and is discharged outside the shielding device through the gas exhaust port; and a gas detection device, located at a position away from the gas collection port, and the gas detection device is used to detect the gas in the air duct system.

[0040] In the present application, the gas generated by the accelerator during irradiation can be discharged outside the shielding device through the setting of the air duct system. However, there are still some gases in the irradiation area and the air duct system, and these gases are the ambient gases inside the shielding device. The gas detection device is located away from the gas collection port, and the opening of the gas collection port is set toward the irradiation area. The gas detection device is away from the gas collection port, that is, away from the irradiation area, which can avoid the irradiation of the accelerator and the signal interference of the electron beam, so that accurate detection results can be obtained.

[0041] It should be pointed out that the gases described in this application are not limited to gases in a narrow sense, such as oxygen, hydrogen, carbon dioxide, ozone, etc., but can also be gases including a certain mixture. For example, the gases in this application can include a visible gas mixture composed of suspended particles and pollutants, such as smoke.

[0042] Figure 1 A schematic diagram of the structure of a shielding device provided in some embodiments of the present application, Figure 2 A schematic diagram of the structure of the air duct system provided in some embodiments of the present application.

[0043] like Figure 1 and Figure 2 As shown, in the present application, the shielding device 1 may include a shielding body 10 and an air duct system 20. The shielding body 10 may be used to shield the electron beam of an accelerator, and the accelerator may irradiate and sterilize the object to be irradiated by the electron beam. The accelerator is arranged inside the shielding body 10, and the radiation dose of the electron beam radiated to the outside of the shielding device 1 may be reduced due to the shielding effect of the shielding body, thereby ensuring the radiation safety of the operator.

[0044] like Figure 1 As shown, a transmission channel 100 is formed in the shielding device 1 , and the shielding device 1 may be a quadrilateral. For example, the shielding device further has an inlet 101 and an outlet 102 , and the inlet 101 and the outlet 102 may be respectively arranged at two corners of the same side of the shielding device 1 .

[0045] However, the present disclosure does not limit the positions of the inlet 101 and the outlet 102 . In some embodiments, for example, the inlet 101 and the outlet 102 may be disposed at two opposite corners along a diagonal line of the shielding device 1 .

[0046] In the present application, a transmission device may also be provided in the shielding device 1, and is provided in the shielding device 1 along the transmission channel 100. The transmission device may unidirectionally transmit the object to be irradiated in the direction from the inlet 101 to the outlet 102. The object to be irradiated enters the shielding device 1 through the inlet 101, and is output to the outside of the shielding device 1 from the outlet 102.

[0047] like Figure 1As shown, the outside of the inlet 101 may be a storage area for non-irradiated objects, and the outside of the outlet 102 may be a storage area for irradiated objects.

[0048] In the present application, the accelerator may be disposed on the transmission channel 100 to generate an electron beam for irradiation sterilization, and the range covered by the electron beam may be the irradiation area.

[0049] In the present application, the shielding body 10 may include a plurality of shielding bodies, some of which may be connected to each other, and some of which may be independently provided without being connected to other shielding bodies, as long as the effect of shielding the electron beam can be achieved.

[0050] In the present application, the shielding body 10 may include a first shielding body 110 and a second shielding body 120. The first shielding body 110 and the second shielding body 120 may be spaced apart from each other to form a transmission channel 100 and constitute an inlet 101 and an outlet 102. In some embodiments, the second shielding body 120 may be one shielding body or may be composed of a plurality of shielding bodies.

[0051] In some embodiments, the first shielding body 110 may be a single shielding body or may be composed of a plurality of shielding bodies. Figure 1 As shown, the first shielding body 110 may include a first component 1111, a second component 1112, and a third component 1113. In a top view, the first component 1111, the second component 1112, and the third component 1113 may be in an I-shape. The first component 1111 and the second shielding body 120 form an inlet 101 and an outlet 102. The second component 1112 is connected between the first component 1111 and the third component 1113. Compared with the first component 1111, the third component 1113 is located inside the shielding device 1.

[0052] like Figure 1 As shown, the first shield 110 may have a first side 111 facing the radiation area, and the first side 111 may be located at the third component 1113. In the present application, the accelerator may be disposed adjacent to or close to the first side 111, or the accelerator may be disposed on the first side 111.

[0053] In some embodiments of the present application, the gas collection port may be located directly below the electron beam of the accelerator. This arrangement will not affect the irradiation of the accelerator and is conducive to collecting the gas in the irradiated area for detection and discharge.

[0054] In some embodiments of the present application, Figure 2As shown, the gas collection port may include a first gas collection port 201 and a second gas collection port 204. The air duct system 20 may include a first air duct 202 and a second air duct 205, the first gas collection port 201 and the gas discharge port 203 may be located at both ends of the first air duct 202, the second gas collection port 204 may be located at one end of the second air duct 205, and the other end of the second air duct 205 may be connected to the first air duct 202.

[0055] Two air ducts and two gas collection ports are provided, and the two gas collection ports are distributed at different positions. Both air ducts can be used to collect and discharge gas. In the present application, the residual gas after detection is sent back to the first air duct by the second air duct to form a closed-loop gas transport, thereby reducing the pollution of harmful gases to the irradiation space environment.

[0056] In the present application, the first air duct 202 may be a channel for exhausting gas, and the second air duct 205 may be a channel for detecting gas. For example, the gas generated by irradiation in the shielding device 1 may be exhausted through the first air duct 202. In addition to the exhausted gas, the gas generated by irradiation in the shielding device 1 may enter the second air duct 205 to be detected, and after the detection, it may be discharged into the first air duct 202 through the second air duct 205, and the gas in the second air duct 205 may be exhausted through the first air duct 202.

[0057] In the present application, the gas detection device may be located in the second air duct, for example, the gas detection device may be arranged in the second air duct, or the detection unit of the gas detection device may be arranged in the second air duct. In some embodiments, the gas detection device may be arranged in the first shielding body 110, and the detection unit of the gas detection device may be located in the second air duct for detecting the gas in the second air duct.

[0058] In some embodiments of the present application, the gas detection device may include an ozone detection device 207 and a smoke detection device 208, and the ozone detection device 207 and the smoke detection device 208 are arranged in sequence along the flow direction of the gas. The so-called flow direction of the gas may be the direction from the gas collection port to the gas discharge port.

[0059] In the present application, the ozone detection device 207 can detect ozone, and the smoke detection device 208 can detect smoke.

[0060] In the present application, a fan may be provided in the air duct system 20, and the fan may absorb the gas generated by electron beam irradiation in the shielding device 1 into the air duct system 20 so as to facilitate the gas detection device to detect the ambient gas.

[0061] In the present application, for example, ozone and smoke generated by electron beam irradiation can be discharged to the outside of the shielding device 1 through the air duct system 20 without the need for a fan to collect the gas. At this stage, the fan can be turned off, or the fan can be turned on but the power is relatively small. After a period of discharge, there is still a certain amount of ozone and smoke inside the shielding device 1, and these ozone and smoke are considered to be environmental gases that need to be detected. Subsequently, the fan can be turned on to collect these environmental gases into the air duct system 20 for detection by the gas detection device, and after the detection is completed, the air duct system 20 is discharged to the outside of the shielding device 1.

[0062] It should be noted that the present disclosure is not limited to such a setting, and multiple fans may be set, some of which are turned on in the gas exhaust stage to collect gas, and some of which may be turned on in the detection stage to collect gas. The power of the fan turned on in the gas exhaust stage may be smaller than the fan turned on in the detection stage. Alternatively, in some embodiments, the same or the same fan may be turned on at different powers in different stages to achieve different suction forces.

[0063] In the present application, the gas detection device can be used to detect the ambient gas in the first air duct 202. For example, ozone and smoke generated by electron beam irradiation can be discharged through the first air duct 202 and the second air duct 205. After the discharge stage, the detection stage begins, and the gas detection device in the first air duct 202 can detect the gas absorbed by the fan.

[0064] In the present application, the gas detection device can be used to detect the ambient gas in the second air duct 205. For example, ozone and smoke generated by electron beam irradiation can be discharged through the first air duct 202 and the second air duct 205. After the discharge stage, the detection stage begins, and the gas detection device in the second air duct 205 can detect the gas absorbed by the fan 206.

[0065] In the present application, a plurality of gas detection devices may be provided, and the plurality of gas detection devices may be used to detect the ambient gas in the two air ducts respectively.

[0066] When multiple gas detection devices are used to detect the ambient gas in two air ducts respectively, numerical calibration can be performed based on comparative analysis of the ambient gas conditions in the two air ducts detected, or the gas conditions in the two air ducts detected can be integrated based on comparative analysis to obtain more accurate gas conditions.

[0067] In some embodiments of the present application, the second air duct 205 may be located between the first air duct 202 and the first side 111 .

[0068] According to such a configuration, most of the gas generated by the electron beam in the shielding device 1 can be discharged through the first air duct 202, and the ambient gas can be collected through the second air duct 205 for gas detection by the gas detection device. Such a configuration is conducive to the second air duct 205 to conveniently collect ambient gas.

[0069] In the present application, along the irradiation direction of the accelerator, at least a portion of the first shielding body 110 is located between the accelerator and the gas detection device. Since at least a portion of the first shielding body 110 is located between the accelerator and the gas detection device, the gas detection device can be prevented from being affected by the accelerator radiation, thereby obtaining a more accurate detection result.

[0070] In the present application, the shape and location of the first shielding body 110 are not limited to Figure 1 The first shielding body 110 has the shape and the setting position shown in the figure, as long as it can block the radiation of the accelerator from affecting the gas detection device.

[0071] In some embodiments of the present application, Figure 2 As shown, part of the second air duct 205 may extend along the first side 111 , and the gas detection device may be used to detect the gas in the second air duct 205 .

[0072] The portion of the second air duct extends along the first side. For example, the portion of the second air duct may extend from the first side in a direction away from the irradiation area, so that the portion of the second air duct may be away from the irradiation area on the extended path. The gas detection device is located in such a second air duct, and gas detection may be performed while avoiding signal interference of electron irradiation and electron beam, so as to obtain a more accurate ambient gas condition.

[0073] In some embodiments of the present application, Figure 1 As shown, the first end of the first side 111 has a protrusion 1110, and the second air duct bypasses the protrusion and extends in a direction away from the protrusion 1110. The gas detection device can be used to detect gas at a position of the second air duct away from the protrusion in the gas flow direction.

[0074] The first end of the first side 111 may have a protrusion 1110, and the setting of the protrusion 1110 can shield the radiation of the accelerator from the area outside the first side 111 of the first shielding body 110. Therefore, the portion of the second air duct 205 extending around the protrusion 1110 can avoid electron irradiation and signal interference of the electron beam, and the gas detection device is arranged at a position of the second air duct away from the protrusion in the gas flow direction, so that the detection of the gas detection device can avoid electron irradiation and signal interference of the electron beam.

[0075] like Figure 1 As shown, the protrusion 1110 protrudes toward the irradiation area. Figure 1 As shown, both ends of the first side 111 can be provided with protrusions 1110, and the second air duct 205 can bypass the protrusion 1110 at one end of the first side 111 according to the setting requirements, or can extend toward the protrusions 1110 at both ends to bypass the protrusions 1110 at both ends.

[0076] In some embodiments of the present application, Figure 2 As shown, the first shielding body 110 may include a second side 112 opposite to the first side 111, and a third side 113 located between the first side 111 and the second side 112; the second air duct 205 may include a first portion 251 and a second portion 252 connected to each other, the second gas collecting port 204 may be located in the first portion 251, the first portion 251 extends along the first side 111 in the first direction, and the second portion 252 may extend along the third side 113 in the first direction.

[0077] In the present application, the gas detection device may be located in the second portion 252, for example, the gas detection device may be disposed in the second portion 252, or the detection unit of the gas detection device may be located in the second portion 252 for detecting the gas in the second portion 252. In some embodiments, the gas detection device may be disposed on the third side 113, and the detection unit of the gas detection device may be located in the second portion 252 for detecting the gas in the second portion 252.

[0078] In the present application, the third side 113 and the first side 111 are located in different planes, that is, the third side 113 and the irradiation area and the accelerator are located in a different space. The gas detection device is arranged in the second part 252 located on the third side 113, so that the detection of the gas detection device can avoid signal interference from electron irradiation and electron beam.

[0079] like Figure 2 As shown, the fan 206, the ozone detection device 207 and the smoke detection device 208 can be disposed in the second portion 252, and along the flow direction of the gas, the fan 206, the ozone detection device 207 and the smoke detection device 208 can be arranged in sequence.

[0080] For example, the fan 206 may be disposed in the second portion 252. The ozone detection device 207 and the smoke detection device 208 may be located in the second portion 252, for example, the ozone detection device 207 and the smoke detection device 208 may be disposed in the second portion 252, or the detection units of the ozone detection device 207 and the smoke detection device 208 may be located in the second portion 252 for detecting the gas in the second portion 252. In some embodiments, the ozone detection device 207 and the smoke detection device 208 may be disposed in the first shielding body 110, and the detection units of the ozone detection device 207 and the smoke detection device 208 may be located in the second portion 252 for detecting the gas in the second portion 252.

[0081] In the present application, the fan can be used to absorb the gas into the second air duct so that the gas detection device can detect the gas. The fan is arranged in the second part of the second air duct and can absorb the gas into the second part so that the gas detection device arranged in the second part can detect the gas. However, the present disclosure is not limited to this. In some embodiments, the fan can be arranged in the first part for gas collection, and the gas detection device can be arranged in the second part for gas detection.

[0082] like Figure 1 and Figure 2 As shown, the first portion 251 extends along the first side 111, and the first portion 251 may have a parallel portion 2511 and a bent portion 2522 that are connected to each other, and the bent portion 2522 may extend along the protruding portion 1110. The present disclosure does not limit the specific shapes of the parallel portion 2511 and the bent portion 2522, as long as they are extended and arranged at relative positions along the first side 111.

[0083] like Figure 2 As shown, the second air duct 205 may further include a fourth portion 209, which may be connected to the second portion 252 and the first air duct 202. The gas in the second air duct 205 flows to the first air duct 202 after detection and is discharged from the gas outlet 203. The fourth portion 209 may have one or more bends and extend along the shielding body.

[0084] Figure 3 The schematic diagram of the structure of the shielding device provided in some other embodiments of the present application is as follows: Figure 3 As shown, in some embodiments of the present application, the second air duct 205 may further include a third portion 253 connected to the second portion 252, the third portion 253 extends along the second side 112, and the gas detection device may be disposed in the third portion 253 of the second air duct 205. For example, the third portion 253 may extend along the second side 112 in a direction away from the first side 111.

[0085] In some embodiments of the present application, the fan and the gas detection device may be arranged in sequence in the flow direction of the gas, such as Figure 3 As shown, the fan 206, the ozone detection device 207 and the smoke detection device 208 can be disposed in the third part 253 to detect the gas in the third part 253. Along the flow direction of the gas, the fan 206, the ozone detection device 207 and the smoke detection device 208 are arranged in sequence.

[0086] In the present application, the gas detection device may be located in the third portion 253, for example, the gas detection device may be disposed in the third portion 253, or the detection unit of the gas detection device may be located in the third portion 253 to detect the gas in the third portion 253. In some embodiments, the gas detection device may be disposed on the second side 112, and the detection unit of the gas detection device may be located in the third portion 253 to detect the gas in the third portion 253.

[0087] In the present application, the fan is arranged in the third part of the second air duct to absorb the gas to the third part, so that the gas detection device can detect the gas. However, the present disclosure is not limited to this. In some embodiments, the fan can be arranged in the first part or the second part to collect the gas, and the gas detection device can be arranged in the third part to detect the gas.

[0088] In the present application, the first air duct 202 may include a shielding body inner channel and a shielding body outer channel, the first gas collection port 201 may be located in the shielding body inner channel, and the gas exhaust port 203 may be located in the shielding body outer channel.

[0089] In the present application, the shielding device 1 may also include an ozone decomposition device, which is connected to the shielding body passage to collect ozone. After being decomposed by the ozone decomposition device and then discharged, the impact of ozone on the environment can be avoided.

[0090] Based on the same or similar concept, the present application also provides an electron irradiation sterilization system, comprising: an accelerator for irradiating an object to be irradiated; and a shielding device as in the first aspect, wherein the accelerator is arranged close to the first side.

[0091] The electron irradiation sterilization system includes an accelerator and a shielding device as in the first aspect. The gas generated by the irradiation of the accelerator can be discharged outside the shielding device through the setting of the air duct system. However, there are still some gases in the irradiation area and the air duct system, and these gases are the environmental gases inside the shielding device. The gas detection device is located inside the air duct system and away from the gas collection port. The opening of the gas collection port is set toward the irradiation area. The gas detection device is away from the gas collection port, that is, away from the irradiation area, which can avoid the irradiation of the accelerator and the signal interference of the electron beam, so that accurate detection results can be obtained.

[0092] In this application, the ozone generated by electron beam irradiation is discharged through the ozone collection port, and most of the ozone is discharged through the air duct system in the shielding body, and the residual ozone gas concentration in the irradiated space environment needs to be strictly detected in accordance with the relevant standards of industrial electron irradiation accelerators. In order to ensure the stable operation of the gas monitoring detector (gas detection device), the gas monitoring detector must be away from the high-dose irradiation environment under the beam. At the same time, in order to ensure that the gas monitoring detector can effectively detect the gas concentration and smoke state of the space environment under the beam, this application is based on the combination of the shielding body design structure and the gas drainage method to realize real-time monitoring of the gas in the electron beam irradiated space environment.

[0093] In the present application, a fan, an ozone detector (ozone detection device) and an ozone sensor (ozone detection device) are installed on the outer wall surface of the electron beam shielding body, effectively reducing direct irradiation and electronic interference of electron beams and X-rays.

[0094] In the present application, a fan is used to guide the gas in the space environment under the beam irradiation through the air duct system to the ozone detector and the smoke detector. The ozone detector and the smoke detector detect the gas state and feed it back to the accelerator master control system for interlocking control.

[0095] In the present application, the electronic irradiation sterilization system may include a control module, which may be connected to the gas detection device and the accelerator signal, for example, it may be an electrical connection, a WiFi connection, a Bluetooth connection, etc. The control module may receive the detection information of the gas detection device, and control the operation of the accelerator in a targeted manner according to the detection information. For example, based on the detection information, the control module may control the accelerator to stop, the accelerator to adjust the irradiation parameters, etc. Thus, the present application may realize the interlocking control of the gas detection device and the accelerator.

[0096] It should be noted that in the present application, the interlocking control of the gas detection device and the accelerator is not limited to being performed by the control module. In some embodiments, the electron irradiation sterilization system may include a receiving module for receiving the detection information of the gas detection device, and the operator may manually operate the accelerator to adjust it according to the detection information. In some embodiments, the electron irradiation sterilization system may include a judgment module, and the judgment module may judge whether to adjust the accelerator and how to adjust the accelerator according to the detection information obtained by the gas detection device.

[0097] In the present application, the gas detected by the ozone detector and the smoke detector passes through the air duct system to the ozone exhaust duct inside the shielding body, and is discharged outside the shielding body along the air duct.

[0098] In this application, based on the structural characteristics of the shielding body, the ozone exhaust system and the under-beam environment detection system are integrated to form an interlocking control system, which effectively solves the difficulty of under-beam gas environment detection.

[0099] In this application, fans, ozone detectors and smoke detectors are installed on the outer wall surface of the shielding body, which effectively reduces the direct exposure of the detectors to electron beams and X-rays and signal interference, extends their service life, and enhances the operating stability of the irradiation accelerator.

[0100] In the present application, an air duct is used to control the flow of gas below the positive beam of the electron beam, thereby achieving real-time monitoring of the environment below the beam.

[0101] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0102] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0103] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0104] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0105] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0106] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0107] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0108] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A shielding device, characterized in that: Used to shield the electron beam of the accelerator, including: a first shielding body, one side of which faces an irradiation area, wherein the irradiation area is an area where the accelerator irradiates; an air duct system, comprising a gas collecting port and a gas exhaust port, wherein the opening of the gas collecting port is arranged toward the irradiation area, and the gas generated by the accelerator during irradiation enters through the gas collecting port and is exhausted outside the shielding device through the gas exhaust port; and A gas detection device is located away from the gas collection port, and is used to detect the gas in the air duct system.

2. The shielding device according to claim 1, characterized in that The gas collecting port comprises a first gas collecting port and a second gas collecting port; The air duct system includes a first air duct and a second air duct, the first air duct is used to exhaust gas, the second air duct is used to detect gas, the first gas collection port and the gas exhaust port are respectively located at two ends of the first air duct, the second gas collection port is located at one end of the second air duct, and the other end of the second air duct is connected to the first air duct, Wherein, the gas detection device is used to detect the gas in the second air duct.

3. The shielding device according to claim 2, characterized in that: Along the irradiation direction of the accelerator, at least a portion of the first shielding body is located between the accelerator and the gas detection device.

4. The shielding device according to claim 2, characterized in that: The first side of the first shielding body faces the irradiation area, the first end of the first side has a protrusion, the second air duct bypasses the protrusion and extends in a direction away from the protrusion, and the gas detection device is used to detect gas at a position of the second air duct away from the protrusion in the gas flow direction.

5. The shielding device according to any one of claims 2 to 4, characterized in that: The first shield includes a second side opposite to the first side, and a third side between the first side and the second side; The second air duct includes a first portion and a second portion connected to each other, the second gas collecting port is located in the first portion, the first portion extends along the first side, and the second portion extends along the third side.

6. The shielding device according to claim 5, characterized in that The gas detection device is used to detect the gas in the second part; or, The second air duct further includes a third portion connected to the second portion, the third portion extends along the second side, and the gas detection device is used to detect gas in the third portion.

7. The shielding device according to claim 5, characterized in that: The shielding device comprises a fan, The fan is disposed in the second air duct, and is used to make the gas flow along the second air duct to the first air duct.

8. The shielding device according to claim 1, characterized in that: The gas detection device includes an ozone detection device and a smoke detection device.

9. An electron irradiation sterilization system, characterized in that: include: An accelerator, used for irradiating the object to be irradiated; as well as The shielding device according to any one of claims 1 to 8, wherein the accelerator is disposed close to the first side.

10. The electron irradiation sterilization system according to claim 9, characterized in that: The electron irradiation sterilization system further comprises a control module, which is respectively connected to the gas detection device and the accelerator by signal, and which adjusts the operation of the accelerator according to the detection information of the gas detection device.

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