Intelligent radiation shielding mechanism of electron irradiation accelerator

Abstract

The invention discloses an intelligent radiation shielding mechanism of an electron irradiation accelerator, which aims at the operation principle of the electron irradiation accelerator, takes a space area formed by matching a supporting seat with a transmission platform as an irradiation area, and is matched with a freely moving inner rotating wheel to play a role in isolating and shielding the irradiation area. The invention aims to prevent X-ray radiation capacity in an irradiation area from leaking into an external working environment to influence the safety of workers, and on this basis, the purpose of reducing radiation energy in the irradiation area is achieved by key cooperation with an airflow replacement mode, and essentially, the radiation energy in the irradiation area is reduced through the airflow replacement mode. The air flow in the supporting seat continuously passes through the structure of the lead grid plate, the purpose of reducing the radiation energy is achieved by utilizing the material characteristic of the lead material, assembly control is carried out based on the radiation energy in the supporting seat by taking the control module as a main body in the whole structure, and the abnormal influence caused by too high / low radiation energy is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of radiation shielding, and in particular to an intelligent radiation shielding mechanism for an electron irradiation accelerator. Background Art

[0002] The working principle of the electron irradiation accelerator is to use voltage to accelerate particles. It irradiates objects by generating high-energy electron beams or X-rays. The accelerator shield is designed to ensure the safety of personnel during the irradiation process. Its essence is to reduce the damage of X-rays to the human body. Please refer to the relevant content mentioned in the publication number CN115424758A.

[0003] The radiation intensity of X-rays naturally decreases with the passage of time. Similarly, for the irradiation area during the irradiation operation, the radiation intensity of X-rays therein also increases with the passage of time. This is manifested in an increase in X-ray dose, which leads to excessive radiation effect on the irradiated objects, and even some X-ray radiation "leaks" into the external working area, thus affecting the safety of external workers. However, the forced reduction of X-ray dose in the irradiation area will also affect the treatment effect of the irradiated objects, which is manifested in abnormal conditions such as reduced irradiation sterilization effect of objects.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent radiation shielding mechanism for an electron irradiation accelerator. For the irradiation area of ​​the electron irradiation accelerator, the radiation intensity of the X-rays inside it continues to increase with the passage of operating time, which on the one hand affects the radiation effect of the objects, and also affects external personnel due to partial "leakage" of the X-rays. How to maintain the X-ray radiation dose inside the irradiation area is a problem that needs to be solved.

[0006] The object of the present invention can be achieved by the following technical solutions: An intelligent radiation shielding mechanism for an electron irradiation accelerator, applied to the electron irradiation accelerator, comprises a transmission platform and a support seat, wherein the transmission platform passes through the central area of ​​the support seat along its length direction, a reversing groove is opened in the inner position of the support seat, and an inner rotating wheel is arranged in the reversing groove; The upper end of the support seat is provided with an installation window, the inner rotating wheel is provided with an opening corresponding to the installation window, and the outer wall position of the inner rotating wheel corresponding to the support seat is provided with a spiral flow groove, and the support seat and the inner wall position of the support seat corresponding to the transmission platform are provided with air leakage ports corresponding to the spiral flow groove; A fan assembly is arranged at an external position of the support seat, and a connecting air outlet corresponding to the fan assembly is installed at an outer wall position of the support seat, and a radiation detector assembly is installed at an inner wall position of the support seat corresponding to the transmission platform.

[0007] It is further configured as follows: left and right gates are provided on both sides of the support seat along the transmission direction of the corresponding transmission platform.

[0008] It is further configured as follows: a driven gear is installed at one end of the inner rotating wheel, and a driving motor assembly corresponding to the driven gear is installed at the lower side of the support seat.

[0009] It is further configured as follows: the installation window is used to install the electron radiation accelerator, and the installation window is located directly above the support seat.

[0010] It is further configured that: radiation protection coatings are provided on the inner wall and the outer wall of the inner rotating wheel.

[0011] It is further configured as follows: the fan assembly consists of a bellows, an air pump and a control assembly, the input end of the air pump is connected to one of the connecting air ports, the output end of the air pump is connected to the inside of the bellows, and the inside of the bellows is connected to another connecting air port.

[0012] It is further configured as follows: the control assembly in the fan assembly establishes a control module associated with the radiation detector assembly and the air pump, the control module is composed of a single data integration unit, a data analysis unit and an action coordination unit, and the single data integration unit is used to record the detection value of the radiation detector assembly in real time, and is represented by Qet; The data analysis unit is based on the single data integration unit and sets Qeo based on the detection value of the radiation detector assembly. Qeo includes Qeo max and Qeo min Two values, Qet and Qeo collected in real time max , Qeo min The two values ​​are compared and analyzed to obtain the operating status of the radiation environment inside the support base; The action coordination unit inputs an action instruction to the air pump in the fan assembly according to the operating status of the internal radiation environment of the support base obtained by the data analysis unit.

[0013] It is further configured as follows: in the comparative analysis in the data analysis unit, the following status is obtained: A: When Qeo max When <Qet, it indicates an abnormal state of excessive energy; B: When Qeo min >Qet indicates an abnormal state of too low energy; C: When Qeo max >Qet>Qeo min , it indicates normal operation; According to C state with Qeo max , Qeo minThe radiation energy level coefficient M inside the support is obtained by two numerical calculations, and according to (Qeo max +Qeo min ) / 2 re-optimizes the calculation method of the radiation energy level coefficient M, and inputs the optimized calculation method into the action coordination unit.

[0014] The present invention has the following beneficial effects: 1. In view of the operation mode of the electron irradiation accelerator, a support seat is further added to "wrap" the local position of the transmission platform to form a relatively closed irradiation area, and cooperate with the freely movable inner rotating wheel to isolate and shield the irradiation area. The purpose is to prevent the X-ray radiation capacity inside the irradiation area from leaking into the external working environment and affecting the safety of the staff. The inner rotating wheel mainly performs intermittent / pulse irradiation by rotating at a fixed angle, and the overall structure specifically reduces the radiation energy in the irradiation area by airflow displacement. Its essence is to use airflow displacement to make the airflow inside the support seat continuously pass through the lead grid structure, thereby utilizing the material properties of the lead material to reduce the radiation energy; 2. Based on the above content, the present invention establishes a control module associated with the radiation detector assembly and the air pump based on the control assembly in the fan assembly. Its purpose is to obtain the radiation energy level coefficient as a basis through comparative analysis of the radiation energy detected by the radiation detector assembly inside the support base, and use this value to issue an action instruction to the air pump. By starting or not starting the air pump, the airflow replacement method is controlled to avoid abnormal effects caused by excessively high / low radiation energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is an assembly position diagram of an intelligent radiation shielding mechanism for an electron irradiation accelerator proposed by the present invention; Figure 2 A schematic diagram of the structure of an intelligent radiation shielding mechanism for an electron irradiation accelerator proposed by the present invention; Figure 3 A transverse cross-sectional view of a support seat in an intelligent radiation shielding mechanism of an electron irradiation accelerator proposed by the present invention; Figure 4A longitudinal cross-sectional view of a support seat in an intelligent radiation shielding mechanism of an electron irradiation accelerator proposed by the present invention; Figure 5 This is a schematic diagram of the structure of an inner rotating wheel in an intelligent radiation shielding mechanism of an electron irradiation accelerator proposed by the present invention; Figure 6 The invention provides an intelligent radiation shielding mechanism for an electron irradiation accelerator. Figure 2 sectional view of .

[0017] In the figure: 1. Transmission platform; 2. Support base; 3. Fan assembly; 4. Driven gear; 5. Installation window; 6. Left and right gates; 7. Connection air outlet; 8. Drive motor assembly; 9. Radiation detector assembly; 10. Opening; 11. Spiral flow groove; 12. Inner rotor; 13. Reversing groove; 14. Air leakage outlet. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: For the irradiation area of ​​the electron irradiation accelerator, the radiation intensity of the X-ray inside it continues to increase with the running time, which affects the radiation effect of the object on the one hand, and also affects the external staff due to the "leakage" of some X-rays. How to maintain the X-ray radiation dose inside the irradiation area is a problem that needs to be solved, and the following technical solutions are proposed: Reference Figures 1 to 6 In this embodiment, an intelligent radiation shielding mechanism of an electron irradiation accelerator is applied to the electron irradiation accelerator, and includes a transmission platform 1 and a support seat 2. The transmission platform 1 passes through the central area of ​​the support seat 2 along its length direction. A reversing groove 13 is opened in the inner position of the support seat 2, and an inner rotating wheel 12 is arranged in the reversing groove 13. The upper end of the support seat 2 is provided with an installation window 5, the inner rotating wheel 12 is provided with an opening 10 corresponding to the installation window 5, and the inner rotating wheel 12 is provided with a spiral flow groove 11 at a position of the outer wall corresponding to the support seat 2, and the support seat 2 and the inner wall position of the support seat 2 corresponding to the transmission platform 1 are provided with an air leakage port 14 corresponding to the spiral flow groove 11; A fan assembly 3 is arranged at an external position of the support seat 2, and a connecting air outlet 7 corresponding to the fan assembly 3 is installed on the outer wall position of the support seat 2, a radiation detector assembly 9 is installed on the inner wall position of the support seat 2 corresponding to the transmission platform 1, left and right gates 6 are arranged on both sides of the support seat 2 along the transmission direction of the corresponding transmission platform 1, a driven gear 4 is installed at one end of the inner rotating wheel 12, a driving motor assembly 8 corresponding to the driven gear 4 is installed on the lower side of the support seat 2, an installation window 5 is used to install an electron radiation accelerator, and the installation window 5 is located directly above the support seat 2, and an anti-radiation coating is arranged on the inner and outer walls of the inner rotating wheel 12. The fan assembly 3 consists of a bellows, an air pump and a control assembly, the input end of the air pump is connected to one of the connecting air outlets 7, the output end of the air pump is connected to the inside of the bellows, and the inside of the bellows is connected to the other connecting air outlet 7.

[0020] Working principle: The protective structure proposed by the present invention is aimed at the operation process of the electron irradiation accelerator. Figure 1 For example, the transmission platform 1 is used to continuously transmit the product to be irradiated, and the electron irradiation accelerator is directly installed on the support base 2 by installing the shooting window 5, and the high-energy X-rays generated by the electron irradiation accelerator are used to irradiate the product to achieve the effect of radiation sterilization, and the essential function of the support base 2 is to limit the irradiation area to prevent the radiation energy from leaking into the external working area; It should also be noted that although concentrating the radiation energy in a small area can improve the utilization rate of the radiation energy, when the radiation capacity in the irradiated area continues to increase, resulting in the radiation energy in the irradiated area exceeding the standard, this process does not utilize the above-mentioned radiation sterilization process. The following is an explanation of the overall operation process: S1: The left and right gates 6 of the transmission platform 1 are periodically started according to the movement process of the product to be irradiated, the purpose of which is to ensure that when the electron irradiation accelerator emits X-rays, the interior of the integral support base 2 is in a temporarily closed state, and the left and right gates 6 can be driven by electric, hydraulic or pneumatic means; S2; When the electron irradiation accelerator emits X-rays, the driving motor assembly 8 drives the integral inner rotating wheel 12 to rotate at a fixed angle, the purpose of which is to ensure that the opening 10 in the inner rotating wheel 12 is exactly aligned with the installation window 5. On the contrary, when the electron irradiation accelerator is in temporary operation, it is necessary to rotate the inner rotating wheel 12 again to ensure that the opening 10 therein is exactly misaligned with the installation window 5. This part also ensures that the interior of the integral support seat 2 is in a relatively closed state, and the essence of the driving motor assembly 5 is a driving motor and a driving gear; S3: It needs to be further explained that: a number of radiation detector assemblies 9 are installed inside the support base 2, and their essence is to detect the radiation energy inside the support base 2 in real time, and perform simple control according to the radiation energy requirements of the product to be irradiated. When the radiation energy inside the support base 2 is too low, it is necessary to increase the output power of the electron irradiation accelerator. Conversely, when the radiation energy inside the support base 2 is too high, it is necessary to reduce the radiation energy inside it in time. According to the processing method of X-ray radiation energy, in the present invention, the radiation energy inside the support base 2 is mainly reduced by accelerating the flow of airflow inside the support base 2.

[0021] Embodiment 2: This embodiment is to explain the radiation environment inside the support base: The support seat 2 must first ensure that the X-ray radiation energy generated by the electron irradiation accelerator will not be emitted to the external space. For this purpose, the integral inner rotating wheel 12 is used as a basic structure for shielding radiation. Its essence is that the inner wall and the outer wall of the inner rotating wheel 12 are coated with a radiation-proof coating. The radiation-proof coating can be based on lead material, so that when the X-ray passes through the inner rotating wheel 12, the radiation energy is greatly reduced by the radiation-proof coating; As for the explanation of the fan assembly 3 in the present invention, the key lies in the bellows therein. The essence of the air pump is to blow external air into the interior of the support seat 2. Similarly, the air inside the support seat 2 will be sucked in and merged into the bellows. The bellows is filled with structures such as lead grids, and specifically limits the flow of gas in the bellows. Its essence lies in: the gas sucked out from the interior of the support seat 2 directly enters the bellows. On the one hand, it is used to reduce the "density" of the radiation capacity inside the support seat 2. On the other hand, it is mainly to introduce the airflow doped with X-ray radiation energy into the bellows, so that the original gas inside the support seat 2 is in full contact with the lead grid, so as to use the characteristics of the lead material to "absorb and reduce" the radiation energy. The gas treated by the lead grid can also flow back to the interior of the support seat 2 again. Its purpose is to reduce the radiation energy inside the support seat 2 by controllable means.

[0022] Embodiment 3: This embodiment is combined with Embodiment 1 and Embodiment 2 to supplement the operation process of the overall invention: The control assembly in the fan assembly 3 establishes a control module associated with the radiation detector assembly 9 and the air pump. The control module consists of a single data integration unit, a data analysis unit and an action coordination unit. The single data integration unit is used to record the detection value of the radiation detector assembly 9 in real time and is represented by Qet; The data analysis unit is based on the single data integration unit and sets Qeo based on the detection value of the radiation detector assembly 9. Qeo includes Qeo max and Qeo min Two values, Qeo max and Qeo minThey represent the maximum radiation energy and the minimum radiation energy of the irradiated product when it receives radiation, so that the Qet and Qeo collected in real time can be used in the data analysis unit. max , Qeo min The two values ​​are compared and analyzed, which is specifically shown as follows: A: When Qeo max When <Qet, it indicates an abnormal state of excessive energy; B: When Qeo min >Qet indicates an abnormal state of too low energy; C: When Qeo max >Qet>Qeo min , it indicates normal operation; However, in combination with the above content, it is also necessary to explain that: for the above C state, it is necessary to explain again that during the operation of the electron irradiation accelerator, the radiation capacity inside the support base 2 is in an up and down fluctuation state. In order to maintain the stability of the radiation environment inside the support base 2, it is necessary to control the assembly through the action coordination unit, specifically, the real-time collected Qet cooperates with Qeo max , Qeo min The radiation energy level coefficient M inside the support base 2 is obtained by two numerical calculations, which is specifically expressed as: M= (Qet-Qeo) / (Qeo max ·Qeo min ), and in the calculation process, it is also necessary to actively cooperate with the above three states C; C1: When Qeo max >Qet>(Qeo max +Qeo min ) / 2, the calculation method is optimized to M=(Qet-(Qeo max +Qeo min ) / 2) / Qeo min ; C2: When Qeo min <Qet<(Qeo max +Qeo min ) / 2, the calculation method is optimized to M=(Qet-(Qeo max +Qeo min ) / 2) / Qeo max ; The above-mentioned C1 and C2 states specifically represent that the radiation energy inside the support base 2 is close to the A state and the B state. In the calculation method of the radiation energy level coefficient M in the C1 and C2 states, the radiation energy level coefficients in the two states are marked as M respectively. C1 and M C2 , and for M C1 and M C2Set the intermediate coefficients X1 and X2 again. Both X1 and X2 are constants. According to the four states of C1, C2, A and B, the following action instructions are input to the fan assembly 3 through the action coordination unit: Action instruction 1: In state A, directly start the air pump to continuously replace the airflow inside the support seat 2 until the state A is restored to state C; Action instruction 2: In state B, the air pump is not started, and the operation state of the electron irradiation accelerator is maintained, or the output power of the electron irradiation accelerator is increased to restore state B to state C: Action command three: In the C1 state, when M C1 > X1, directly start the air pump, intermittently replace the air flow inside support 2, by M C1 >X1 restored to M C1 <X1; Action instruction 4: In the C2 state, when M C2 <X2, intermittently increase the output power of the electron irradiation accelerator, by M C2 <X2 returns to M C2 >X2.

[0023] To sum up: according to the operating principle of the electron irradiation accelerator, the space area formed by the support base and the transmission platform is used as the irradiation area, and the freely movable inner rotating wheel is used to isolate and shield the irradiation area. Its purpose is to prevent the X-ray radiation capacity inside the irradiation area from leaking into the external working environment and affecting the safety of the staff. On this basis, the key is to cooperate with the airflow replacement method to reduce the radiation energy in the irradiation area. Its essence is to use the airflow replacement method to make the airflow inside the support base continuously pass through the lead grid structure, thereby utilizing the material properties of the lead material to reduce the radiation energy. The overall structure is based on the control module, which is based on the radiation energy inside the support base for assembly control to avoid abnormal effects caused by excessively high / low radiation energy.

[0024] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent radiation shielding mechanism for an electron irradiation accelerator, applied to the electron irradiation accelerator, comprising a transmission platform (1) and a support seat (2), characterized in that: The transmission platform (1) passes through the central area of ​​the support seat (2) along its length direction, a reversing groove (13) is provided in the inner position of the support seat (2), and an inner rotating wheel (12) is provided in the reversing groove (13); The support seat (2) is provided with a shooting window (5) at the upper end thereof, the inner rotating wheel (12) is provided with an opening (10) corresponding to the shooting window (5), and the inner rotating wheel (12) is provided with a spiral flow groove (11) at a position on the outer wall of the support seat (2), and the support seat (2) and the inner wall of the support seat (2) corresponding to the transmission platform (1) are provided with an air leakage port (14) corresponding to the spiral flow groove (11); A fan assembly (3) is arranged at an external position of the support base (2), and a connecting air outlet (7) corresponding to the fan assembly (3) is installed at an outer wall position of the support base (2), and a radiation detector assembly (9) is installed at an inner wall position of the support base (2) corresponding to the transmission platform (1).

2. The intelligent radiation shielding mechanism of an electron irradiation accelerator according to claim 1, characterized in that: The support seat (2) is provided with left and right gates (6) at positions on both sides along the transmission direction of the corresponding transmission platform (1).

3. The intelligent radiation shielding mechanism of an electron irradiation accelerator according to claim 1, characterized in that: A driven gear (4) is mounted on one end of the inner rotating wheel (12), and a drive motor assembly (8) corresponding to the driven gear (4) is mounted on the lower side of the support seat (2).

4. The intelligent radiation shielding mechanism of an electron irradiation accelerator according to claim 1, characterized in that: The installation window (5) is used for installing an electron radiation accelerator, and the installation window (5) is located directly above the support seat (2).

5. The intelligent radiation shielding mechanism of an electron irradiation accelerator according to claim 1, characterized in that: Radiation protection coatings are provided on the inner wall and the outer wall of the inner rotating wheel (12).

6. The intelligent radiation shielding mechanism of an electron irradiation accelerator according to claim 1, characterized in that: The fan assembly (3) is composed of a bellows, an air pump and a control assembly, wherein the input end of the air pump is connected to one of the connecting air ports (7), the output end of the air pump is connected to the interior of the bellows, and the interior of the bellows is connected to another connecting air port (7).

7. The intelligent radiation shielding mechanism of an electron irradiation accelerator according to claim 6, characterized in that: The control assembly in the fan assembly (3) establishes a control module associated with the radiation detector assembly (9) and the air pump, the control module is composed of a single data integration unit, a data analysis unit and an action coordination unit, the single data integration unit is used to record the detection value of the radiation detector assembly (9) in real time, and is represented by Qet; The data analysis unit is based on the single data integration unit and sets Qeo based on the detection value of the radiation detector assembly (9). Qeo includes Qeo max and Qeo min Two values, Qet and Qeo collected in real time max , Qeo min The two values ​​are compared and analyzed to obtain the operating state of the internal radiation environment of the support seat (2); The action coordination unit inputs an action instruction to the air pump in the fan assembly (3) according to the operating state of the internal radiation environment of the support seat (2) obtained by the data analysis unit.

8. The intelligent radiation shielding mechanism of an electron irradiation accelerator according to claim 7, characterized in that: In the comparative analysis in the data analysis unit, the following status is obtained: A: When Qeo max When <Qet, it indicates an abnormal state of excessive energy; B: When Qeo min >Qet indicates an abnormal state of too low energy; C: When Qeo max >Qet>Qeo min , it indicates normal operation; According to C state with Qeo max , Qeo min The radiation energy level coefficient M inside the support (2) is obtained by two numerical calculations and is calculated according to (Qeo max +Qeo min ) / 2 re-optimizes the calculation method of the radiation energy level coefficient M, and inputs the optimized calculation method into the action coordination unit.

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