A self-shielded lead house and a radiation safety monitoring method for a self-shielded lead house

Abstract

The present application relates to the technical field of radiation protection, and provides a self-shielded lead room and a radiation safety monitoring method for the self-shielded lead room. The self-shielded lead room comprises a lead plate shielding shell, a detection system and a radiation monitoring system. The detection system is arranged in a shielding cavity of the lead plate shielding shell, and the radiation monitoring system comprises a first radiation detection module, a second radiation detection module and an access control interlocking module. The first radiation detection module is used for detecting whether the radiation intensity inside the lead room exceeds the standard range during normal operation of the detection system. The second radiation detection module is used for detecting whether the radiation intensity at a detection point outside the lead room exceeds the background level. The access control interlocking module is used for feeding back whether the protective lead door is tightly closed. The present application sets the radiation monitoring system, integrates the intelligent monitoring system with the X-ray intensity detection, the closedness monitoring and the automatic alarm function, realizes the real-time monitoring and early warning of the operation state of the lead room, and greatly improves the safety and the intelligent level of the self-shielded lead room.

Description

Technical Field

[0001] This invention relates to the technical field of radiation protection, and more specifically, to a self-shielded lead room and a radiation safety monitoring method for the self-shielded lead room. Background Technology

[0002] Industrial Computed Tomography (ICT) technology, with its non-contact, high-precision, and three-dimensional visualization capabilities, has become an indispensable quality control tool in high-end manufacturing fields such as aerospace, automotive manufacturing, nuclear power equipment, and electronic information. This technology can accurately acquire the geometric dimensions, density distribution, and defect information of the internal structure of a workpiece without damaging it, providing crucial data support for product design verification, process optimization, and quality assessment. However, industrial CT equipment generates ionizing radiation such as X-rays and gamma rays during operation. If not properly protected, these rays can cause irreversible damage to the health of operators and may also cause radioactive pollution to the surrounding environment, severely restricting the widespread application and promotion of this technology. Furthermore, existing lead-lined rooms lack intelligent monitoring and early warning mechanisms, making it difficult to respond promptly to protective failures and creating potential safety hazards. Summary of the Invention

[0003] The purpose of this invention is to provide a self-shielded lead room and a radiation safety monitoring method for the self-shielded lead room, so as to solve the technical problem that lead rooms in the prior art lack intelligent monitoring and early warning mechanisms.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: On one hand, the present invention provides a self-shielded lead room, comprising: A lead plate shielding housing, wherein the lead plate shielding housing has a shielding cavity; The detection system is disposed within the shielded cavity; A radiation monitoring system, comprising: Control processing module; The first radiation detection module is used to detect whether the radiation intensity inside the lead room exceeds the standard range when the detection system is operating normally. The second radiation detection module is used to detect whether the radiation intensity at the detection point outside the lead room exceeds the background level. Access control interlocking module, which is used to provide feedback on whether the protective lead door is closed tightly; The first radiation detection module, the second radiation detection module, and the access control interlock module are all electrically connected to the control processing module. The control processing module receives signals from the first radiation detection module, the second radiation detection module, and the access control interlock module to perform logical judgments and output control commands. The control processing module is connected to the alarm communication module, which is used to issue a warning signal when an abnormality occurs and push the alarm information to the remote monitoring terminal.

[0005] According to the self-shielded lead room described above, the lead plate shielding shell includes a supporting frame structure, the supporting frame structure comprising: Multiple square tubes are used to construct a framework; Multiple lead plates are provided, which are wrapped around the outside of the frame and connected to the frame. Adjacent lead plates are spliced ​​at the square tube. A shielding lead plate is provided in the cavity of the square tube to cover the gaps at the splicing of adjacent lead plates.

[0006] According to the self-shielded lead room described above, the supporting frame structure also includes multiple reinforcing plates, which are installed on the frame and fixedly connected to the frame.

[0007] According to the self-shielded lead room described above, the lead plate shielding shell includes a protective lead door, and the protective lead door includes: The first lead door has a first lead plate tongue protruding from its closing end; The second lead door has a second lead plate tongue protruding from its closing end; When the first lead door and the second lead door are closed, the first lead plate tongue and the second lead plate tongue overlap to cover the splicing gap at the point where the first lead door and the second lead door meet.

[0008] According to the self-shielded lead room described above, the lead plate shielding shell is provided with ventilation openings and cable ports, and both the ventilation openings and cable ports are equipped with protective lead covers, the protective lead covers comprising: The protective lead cover body has a protective lead cover cavity, an inlet and an outlet. The inlet and the outlet are both connected to the protective lead cover cavity. The inlet is connected to the shielding cavity, and the outlet corresponds to the ventilation port or the cable port. A lead baffle assembly is disposed within the cavity of the protective lead cover and near the entrance. The lead baffle assembly includes multiple lead baffles arranged in a staggered manner to form a labyrinth structure to prevent radioactive rays from leaking directly from the ventilation opening or the cable opening.

[0009] According to the self-shielded lead room described above, the detection system includes: A radiation source, which generates high-energy X-rays that penetrate the workpiece to be inspected; A detector for receiving X-rays that have attenuated after penetrating a workpiece and converting them into electrical signals; A mechanical scanning mechanism is used to precisely control the relative movement between the workpiece and the X-ray source and detector during the scanning process.

[0010] According to the self-shielded lead room described above, the thickness of the lead plate shielding shell is based on the exponential law of radiation attenuation, and its exponential attenuation law is as follows:

[0011] Or its variations are:

[0012] in: ： Radiation intensity without shielding; The residual radiation intensity after passing through the lead plate; The thickness of the lead plate; : The linear attenuation coefficient of lead for specific energy rays.

[0013] According to the self-shielded lead room described above, the relationship between X-ray intensity and distance follows the inverse square law, meaning the intensity decreases inversely with the square of the distance:

[0014] : indicates a distance of X-ray intensity at that location; : indicates a distance of X-ray intensity at that location; : Indicates the distance from measurement point 1 to the X-ray source; : Indicates the distance from measurement point 2 to the X-ray source.

[0015] On the other hand, the present invention also provides a radiation safety monitoring method for a self-shielded lead room, applied to the radiation monitoring system described above, comprising the following steps: Real-time acquisition of radiation data and closure status signals, wherein the radiation data includes the internal radiation intensity and external radiation intensity of the lead room, and the closure status signal is the closed status signal of the protective lead door of the lead room; An alarm is triggered based on the radiation data and the closed status signal; The conditions for triggering the alarm are as follows: When the radiation intensity inside the lead room exceeds the standard range for normal operation of the detection system, it indicates that there is abnormal exposure of the radiation source, and an alarm is triggered. And / or, if the radiation intensity at the external detection point of the lead room exceeds the background level, it indicates that the shielding effectiveness of the lead room has decreased or there is a leakage point, and an alarm will be triggered; And / or, if the protective lead door of the lead room is not closed, indicating a leak in the lead room, an alarm will be triggered.

[0016] The beneficial effects of the self-shielded lead room and the radiation safety monitoring method for the self-shielded lead room provided by the present invention are at least as follows: The self-shielded lead room and the radiation safety monitoring method for the self-shielded lead room provided by this invention are equipped with a radiation monitoring system. The system is an intelligent monitoring system that integrates X-ray intensity detection, airtightness monitoring and automatic alarm functions, which realizes real-time monitoring and early warning of the operating status of the lead room, and greatly improves the safety and intelligence level of the self-shielded lead room. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of the self-shielded lead room provided by the present invention; Figure 2 A schematic diagram of the three-dimensional explosion structure of the self-shielded lead room provided by the present invention. Figure 1 ; Figure 3 A schematic diagram of the three-dimensional explosion structure of the self-shielded lead room provided by the present invention. Figure 2 ; Figure 4 A three-dimensional structural diagram of the supporting frame structure of the self-shielded lead room provided by the present invention. Figure 1 ; Figure 5 A three-dimensional structural diagram of the supporting frame structure of the self-shielded lead room provided by the present invention. Figure 2 ; Figure 6 Schematic diagram of the lead plate splicing structure provided by the present invention Figure 1 ; Figure 7 Schematic diagram of the lead plate splicing structure provided by the present invention Figure 2 ; Figure 8 A three-dimensional structural diagram of the supporting frame structure of the self-shielded lead room provided by the present invention. Figure 3 ; Figure 9 A schematic diagram of the structure of the protective lead door provided by the present invention; Figure 10 A top view of the protective lead door provided by the present invention; Figure 11 Schematic diagram of the three-dimensional structure of the lead plate shielding shell provided by the present invention Figure 1 ; Figure 12 Schematic diagram of the three-dimensional structure of the lead plate shielding shell provided by the present invention Figure 2 ; Figure 13 A schematic diagram of the structure of the radiation shield provided by the present invention; Figure 14 A cross-sectional structural diagram of the radiation shield provided by the present invention; Figure 15 This is a schematic diagram of the radiation monitoring system provided by the present invention; Figure 16 The process of the radiation safety monitoring method provided by the present invention Figure 1 ; Figure 17 The process of the radiation safety monitoring method provided by the present invention Figure 2 ; Figure 18 This is a reference diagram of the radiation dose rate of the 225kV open-tube X-ray source of the present invention.

[0019] The following are the labeling elements in the figure: 1000 Self-shielded lead room; 100 Outer shell; 200 Lead plate shielded shell; 201 Shielding cavity; 210 Supporting frame structure; 211 Square tube; 2111 First square tube; 2112 First shielding lead plate; 2113 Second square tube; 2114 Second shielding lead plate; 212 Lead plate; 2121 First lead plate; 2122 Second lead plate; 2123 Third lead plate; 2124 Fourth lead plate; 213 Reinforcing plate; 2131 Load-bearing reinforcing plate; 21311 First reinforcing plate; 21312 Second reinforcing plate; 21313 Third reinforcing plate; 2132 Tensile reinforcing plate; 21321, Mounting hole; 21322, Lifting ring; 2133, Support reinforcing plate; 220, Protective lead door; 221, First lead door; 2211, First lead plate tongue; 2212, First abutment part; 2213, First groove; 2214, First gap; 222, Second lead door; 2221, Second lead plate tongue; 2222, Second abutment part; 2223, Second groove; 2224, Second gap; 223, Second sliding mechanism; 2231, Second slide rail; 2232, Third slider; 2233, Fourth slider; 2234, Third connector; 2235, Fourth connector; 224, Drive mechanism Structure; 2241, Drive motor; 2242, Drive wheel; 2243, Driven wheel; 2244, Transmission belt; 2245, First clamping block; 2246, Second clamping block; 225, First sliding mechanism; 2251, First slide rail; 2252, First slider; 2253, Second slider; 2254, First connecting piece; 2255, Second connecting piece; 230, Ventilation opening; 240, Cable outlet; 250, Protective lead cover; 251, Protective lead cover body; 2511, Cavity; 2512, Inlet; 2513, Outlet; 2514, First side plate; 2515, Second side plate; 2516, Third side plate; 2 517. Sealing base plate; 2518. First connecting part; 2518a. First flange; 2518b. First threaded hole; 2519. Second connecting part; 2519a. Second flange; 2519b. Second threaded hole; 252. Lead baffle assembly; 2521. First lead baffle; 2522. Second lead baffle; 2523. First gap; 2524. Second gap; 300. Detection system; 310. Radiation source; 320. Detector; 330. Mechanical scanning mechanism; 400. Radiation monitoring system; 410. First radiation detection module; 420. Second radiation detection module; 430. Access control interlock module; 440. Alarm communication module; 450. Control processing module. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0022] Please see Figures 1 to 3 This embodiment provides a self-shielded lead room 1000, including an outer shell 100. The self-shielded lead room 1000 also includes a lead plate shielding shell 200, a detection system 300, and a radiation monitoring system 400 disposed within the outer shell 100. The lead plate shielding shell 200 has a shielding cavity 201, the detection system 300 is disposed within the shielding cavity 201, and the radiation monitoring system 400 is used to perform real-time, comprehensive monitoring and early warning of the radiation safety status of the self-shielded lead room 1000.

[0023] Please see Figure 15 The radiation monitoring system 400 includes a first radiation detection module 410, a second radiation detection module 420, and an access control interlock module 430.

[0024] The first radiation detection module 410 is used to detect whether the radiation intensity inside the lead room exceeds the standard range when the detection system is operating normally. The second radiation detection module 420 is used to detect whether the radiation intensity at the detection point outside the lead room exceeds the background level. Both the first radiation detection module 410 and the second radiation detection module 420 are X-ray intensity detectors. X-ray intensity detectors are installed inside and outside the lead room. That is, high-sensitivity X-ray intensity detectors are installed near the radiation source inside the lead room and in the area outside the lead room where operators frequently move to detect the absolute value and relative change of radiation intensity inside and outside the lead room in real time.

[0025] The access control interlock module 430 is used to provide feedback on whether the protective lead door is closed tightly. The access control interlock module 430 is used to detect the closed state of the protective lead door 220. The access control interlock module 430 is a position sensor. A position sensor is installed on the protective lead door 220 to determine whether the lead room is not properly sealed.

[0026] The radiation monitoring system 400 also includes a control processing module 450 and an alarm communication module 440.

[0027] The first radiation detection module, the second radiation detection module, and the access control interlock module are all electrically connected to the control processing module. The control processing module receives signals from the first radiation detection module, the second radiation detection module, and the access control interlock module to perform logical judgments and output control commands. The control processing module is connected to the alarm communication module, which is used to issue warning signals when an anomaly occurs and push alarm information to the remote monitoring terminal.

[0028] The self-shielded lead room 1000 provided in this embodiment is equipped with a radiation monitoring system 400, which is an intelligent monitoring system that integrates X-ray intensity detection, airtightness monitoring and automatic alarm functions. This system enables real-time monitoring and early warning of the lead room's operating status, greatly improving the safety and intelligence level of the self-shielded lead room 1000.

[0029] In one embodiment, see Figures 4 to 5 The lead plate shielding housing 200 includes a supporting frame structure 210, which includes multiple square tubes 211 and multiple lead plates 212. The multiple square tubes 211 are assembled into a frame; the multiple lead plates 212 are wrapped around the outside of the frame and connected to the frame, and adjacent lead plates 212 are spliced ​​at the square tubes 211. The square tube cavity of the square tube 211 is provided with a shielding lead plate 212, which is used to cover the gap h at the splice of adjacent lead plates 212.

[0030] Since microscopic or macroscopic gaps h inevitably form at the joints between adjacent lead plates 212, shielding lead plates are installed inside the square tube 211 at the joints to prevent radiation from leaking directly out of the lead room through the gaps h, thus avoiding the impact on the environment and the health of the operators, and also preventing radiation pollution to the surrounding environment.

[0031] In one embodiment, the lead plate includes a pressure-bearing layer (not shown in the figure, the same below), a shielding lead layer (not shown in the figure, the same below), and a support layer (not shown in the figure, the same below) arranged sequentially. The pressure-bearing layer, the shielding lead layer, and the support layer constitute a sandwich structure. The pressure-bearing layer is used to withstand external mechanical loads and protect the inner lead layer from damage. The shielding lead layer can effectively absorb and scatter ionizing radiation. The support layer prevents the lead from sagging and deforming due to creep (slow flow under long-term gravity), ensuring the long-term stability of the structure.

[0032] In one embodiment, see Figure 6 Each corner of the frame is provided with a whole first square tube 2111. The first lead plate 2121 and the second lead plate 2122 at the corner are vertically spliced ​​at the first square tube 2111. The first square tube 2111 is provided with a first shielding lead plate 2112. The first shielding lead plate 2112 is inclinedly set in the first square tube 2111 to block the gap h at the splice of the first lead plate 2121 and the second lead plate 2122. The above arrangement prevents the radiation from leaking directly from the gap at the corner of the frame.

[0033] In one embodiment, the first shielding lead plate 2112 is disposed on the diagonal of the square tube 211 and covers the entire diagonal, with the first shielding lead plate 2112 forming a 45° angle with any side panel of the square tube 211. Installing the first shielding lead plate 2112 on the diagonal within the square tube cavity makes installation of the first shielding lead plate 2112 more convenient and maximizes its area, thereby improving the effect of preventing radioactive radiation leakage.

[0034] In one embodiment, the joint between the first lead plate 2121 and the second lead plate 2122 corresponds to the middle position of the first shielding lead plate 2112, thereby improving the radiation protection effect.

[0035] In one embodiment, the first lead plate 2121, the second lead plate 2122, the first shielding lead plate 2112 are welded to the first square tube 2111, so that the connection structure is stable.

[0036] In one embodiment, see Figure 7 Each joint of the lead plates on the wall of the frame is provided with a continuous second square tube 2113. The third lead plate 2123 and the fourth lead plate 2124 on the wall are joined at the second square tube 2113. A second shielding lead plate 2114 is provided inside the second square tube 2113. The second shielding lead plate 2114 is arranged parallel to the gap existing at the joint of the third lead plate 2123 and the fourth lead plate 2124 inside the second square tube 2113, so as to cover the gap h existing at the joint of the third lead plate 2123 and the fourth lead plate 2124. The above arrangement prevents the radiation from directly leaking from the gap at the joint of the plane.

[0037] In one embodiment, the width of the second shielding lead plate 2114 is equal to the width of the inner wall of the second square tube 2113.

[0038] Optionally, the second shielding lead plate 2114 is welded to the side wall of the second square tube 2113 at the splice, and the third lead plate 2123 and the fourth lead plate 2124 are welded to the outer wall of the second square tube 2113.

[0039] In one embodiment, the joint between the third lead plate 2123 and the fourth lead plate 2124 is located in the middle of the side wall of the second square tube 2113, which makes the joint structure of the third lead plate 2123 and the fourth lead plate 2124 stable, and makes the side wall of the second square tube 2113 more effective in preventing the leakage of radioactive rays.

[0040] In one embodiment, see Figure 8 The supporting frame structure 210 includes multiple reinforcing plates 213, which are mounted on the frame and fixedly connected to it. Installing reinforcing plates 213 on the frame increases the overall strength of the supporting frame structure 210. Furthermore, the reinforcing plates 213 can serve as mounting bases for equipment, supporting heavy loads and providing a stable and reliable mounting base for the motor. This makes the overall supporting frame structure 210 more stable, reliable, and less prone to deformation, thus preventing gaps in the lead plates 212 mounted on the frame and ensuring effective radiation shielding.

[0041] In one embodiment, see Figure 8 The supporting frame structure 210 includes a load-bearing reinforcing plate 2131, which is located above the protective lead door 220 of the lead room and connected to the frame. The load-bearing reinforcing plate 2131 is used to install the motor, the drive wheel 2242, and the driven wheel 2243. The load-bearing reinforcing plate 2131 provides a stable and reliable mounting base for the motor, the drive wheel 2242, and the driven wheel 2243.

[0042] Optionally, at least one side of the load-bearing reinforcing plate 2131 is provided with at least one reinforcing rib (not shown in the figure, the same below) to enhance the load-bearing strength of the load-bearing reinforcing plate 2131.

[0043] In one embodiment, see Figure 8The load-bearing reinforcing plate 2131 includes a first reinforcing plate 21311, a second reinforcing plate 21312, and a third reinforcing plate 21313. The first reinforcing plate 21311 and the third reinforcing plate 21313 are respectively disposed at both ends of the protective lead door 220 and respectively connected to the frame. The second reinforcing plate 21312 is disposed between the first reinforcing plate 21311 and the third reinforcing plate 21313. The motor and the drive wheel 2242 are mounted on the first reinforcing plate 21311. The first reinforcing plate 21311 can bear the load generated by the continuous vibration of the motor. The driven wheel 2243 is mounted on the third reinforcing plate 21313.

[0044] During the opening and closing of the protective lead door 220, the motor drives the drive wheel 2242 to rotate. The drive wheel 2242 and the driven wheel 2243 are connected by the transmission belt 2244. Therefore, when the drive wheel 2242 is driven to rotate, the drive wheel 2242 drives the transmission belt 2244 and the driven wheel 2243 to move synchronously. The protective lead door 220 includes two doors, the first lead door 221 and the second lead door 222, which are connected to both sides of the transmission belt 2244 respectively, thereby realizing the opening and closing of the protective lead door 220.

[0045] In one embodiment, see Figure 8 The supporting frame structure 210 includes multiple tensile reinforcing plates 2132, which are located at the top of the frame and fixedly connected to it. The tensile reinforcing plates 2132 are also located at the corners of the frame. Optionally, tensile reinforcing plates 2132 are installed at all four corners of the frame. The placement of the tensile reinforcing plates 2132 at the corners enhances the stability and robustness of the entire frame. When moving the entire lead room, the tensile reinforcing plates 2132 can assist in lifting the lead room, making the moving process stable, reliable, and convenient. The tensile reinforcing plates 2132 are triangular in shape to further increase the stability of the frame.

[0046] In one embodiment, see Figure 8 The tensile reinforcing plate 2132 is provided with mounting holes 21321, and a lifting ring 21322 is installed in the mounting holes 21321. The lifting ring 21322 is convenient for assisting in the lifting of the lead room, making the transportation process stable and reliable.

[0047] In one embodiment, see Figure 8 The supporting frame structure 210 includes a plurality of supporting reinforcing plates 2133, which are located at the bottom of the frame and fixedly connected to the frame. This arrangement can enhance the supporting strength of the bottom of the frame.

[0048] In one embodiment, see Figure 9 and Figure 10 The lead plate shielding housing 200 includes a protective lead door 220, which includes a first lead door 221 and a second lead door 222. The closing end of the first lead door 221 is provided with a first lead plate tongue 2211; the closing end of the second lead door 222 is provided with a second lead plate tongue 2221. When the first lead door 221 and the second lead door 222 are closed, the first lead plate tongue 2211 and the second lead plate tongue 2221 overlap to cover the splicing gap at the contact point between the first lead door 221 and the second lead door 222.

[0049] A first lead plate tongue 2211 protrudes from the closing end of the first lead door 221, and a second lead plate tongue 2221 protrudes from the closing end of the second lead door 222. When the first lead door 221 and the second lead door 222 are opened and closed, the first lead plate tongue 2211 and the second lead plate tongue 2221 overlap to block the gap that exists when the first lead door 221 and the second lead door 222 are in contact, thus preventing rays from passing directly out of the gap and achieving excellent protection. Furthermore, the protective lead door 220 provided in this embodiment has a simple structure.

[0050] Optionally, the lead room has a doorway, where the height of the first lead door 221 and the second lead door 222 is greater than the height of the doorway, and the sum of the widths of the first lead door 221 and the second lead door 222 is greater than the width of the doorway. This arrangement improves the protective effect of the protective lead door 220, preventing direct radiation penetration.

[0051] In one embodiment, see Figure 9 and Figure 10 The first lead door 221 has a first abutting portion 2212 at its closing end, and a first groove 2213 on the first abutting portion 2212. The first lead plate tongue 2211 is disposed in the first groove 2213 and abuts against the bottom of the first groove 2213. One side of the first lead plate tongue 2211 is tightly fitted and fixedly connected to the first inner sidewall of the first groove 2213, and the other side of the first lead plate tongue 2211 has a first gap 2214 with the second inner sidewall of the first groove 2213.

[0052] The closing end of the second lead door 222 is provided with a second abutment portion 2222, and the second abutment portion 2222 is provided with a second groove 2223. The second lead plate tongue 2221 is disposed in the second groove 2223 and abuts against the bottom of the second groove 2223. One side of the second lead plate tongue 2221 is tightly fitted and fixedly connected to the first inner sidewall of the second groove 2223, and the other side of the second lead plate tongue 2221 has a second gap 2224 with the second inner sidewall of the second groove 2223.

[0053] When the first lead door 221 and the second lead door 222 are closed by contact, the first lead plate tongue 2211 is inserted into the second gap 2224, and the second lead plate tongue 2221 is inserted into the first gap 2214, so as to achieve the overlap of the first lead plate tongue 2211 and the second lead plate tongue 2221.

[0054] By setting the first groove 2213 and the second groove 2223, the overlapping area of ​​the first lead plate tongue 2211 and the second lead plate tongue 2221 is increased, thereby improving the protective effect of the gap at the joint of the first lead door 221 and the second lead door 222.

[0055] In one embodiment, see Figure 9 and Figure 10 The length of the first lead plate tongue 2211 protruding from the first groove 2213 is 5cm to 30cm, and the length of the second lead plate tongue 2221 protruding from the second groove 2223 is 5cm to 30cm.

[0056] Optionally, the length of the first lead plate tongue 2211 protruding from the first groove 2213 is 25cm, and the length of the second lead plate tongue 2221 protruding from the second groove 2223 is 25cm.

[0057] In one embodiment, see Figure 9 and Figure 10 The protective lead door 220 further includes a first sliding mechanism 225, a second sliding mechanism 223, and a driving mechanism 224. The upper ends of the first lead door 221 and the second lead door 222 are both connected to the first sliding mechanism 225; the lower ends of the first lead door 221 and the second lead door 222 are both connected to the second sliding mechanism 223; the driving mechanism 224 is connected to both the first lead door 221 and the second lead door 222 and drives the first lead door 221 to slide with the first sliding mechanism 225 and the second lead door 222 to slide with the second sliding mechanism 223.

[0058] The drive mechanism 224 is activated, which causes the first lead door 221 to slide on the first sliding mechanism 225 and the second lead door 222 to slide on the second sliding mechanism 223, thereby realizing the opening and closing of the first lead door 221 and the second lead door 222.

[0059] In one embodiment, see Figure 9 and Figure 10The first sliding mechanism 225 includes a first slide rail 2251, a first slider 2252, and a second slider 2253. The first slide rail 2251 is installed on the lead room and is located above the first lead door 221 and the second lead door 222. The first slider 2252 is installed on the first lead door 221 via a first connector 2254. The second slider 2253 is installed on the second lead door 222 via a second connector 2255.

[0060] Optionally, there are two first sliders 2252 and two second sliders 2253. It should be understood that the number of first sliders 2252 and second sliders 2253 can also be other values, which will not be elaborated here.

[0061] The first slider 2252 can be slidably connected to the first slide rail 2251. The first connecting member 2254 is L-shaped. One end of the first slider 2252 is connected to the first connecting member 2254, and the other end of the first connecting member 2254 is connected to the first lead door 221, thereby allowing the first lead door 221 to slide relative to the first slide rail 2251. The second slider 2253 can be slidably connected to the first slide rail 2251. The second connecting member 2255 is L-shaped. One end of the second slider 2253 is connected to the second connecting member 2255, and the other end of the second connecting member 2255 is connected to the second lead door 222, thereby allowing the second lead door 222 to slide relative to the first slide rail 2251, thus realizing the opening and closing of the second lead door 222 and the first lead door 221. The first sliding mechanism 225 described above has a simple structure and stable sliding motion.

[0062] In one embodiment, see Figure 9 and Figure 10 The second sliding mechanism 223 includes a second slide rail 2231, a third slider 2232, and a fourth slider 2233. The second slide rail 2231 is installed on the lead room and is located below the first lead door 221 and the second lead door 222. The third slider 2232 is installed on the first lead door 221 via a third connector 2234. The fourth slider 2233 is installed on the second lead door 222 via a fourth connector 2235.

[0063] Optionally, there can be two third sliders 2232 and two fourth sliders 2233. It should be understood that the number of third sliders 2232 and fourth sliders 2233 can also be other values, which are not limited here.

[0064] The third slider 2232 can be slidably connected to the second slide rail 2231. The third connecting member 2234 is I-shaped. The third slider 2232 is connected to one side of the third connecting member 2234, and the other side of the third connecting member 2234 is connected to the first lead door 221, thereby allowing the first lead door 221 to slide relative to the second slide rail 2231. The fourth slider 2233 can be slidably connected to the second slide rail 2231. The fourth connecting member 2235 is I-shaped. The fourth slider 2233 is connected to one side of the fourth connecting member 2235, and the other side of the fourth connecting member 2235 is connected to the second lead door 222, thereby allowing the second lead door 222 to slide relative to the second slide rail 2231, thus realizing the opening and closing of the second lead door 222 and the first lead door 221. The second sliding mechanism 223 described above has a simple structure and stable sliding motion.

[0065] In one embodiment, the length of the first slide rail 2251 is not less than twice the sum of the widths of the first lead door 221 and the second lead door 222; and / or, the length of the second slide rail 2231 is not less than twice the sum of the widths of the first lead door 221 and the second lead door 222. This facilitates the full opening and closing of the first lead door 221 and the second lead door 222.

[0066] In one embodiment, see Figure 9 and Figure 10 The drive mechanism 224 includes a drive motor 2241, a drive wheel 2242, a driven wheel 2243, a transmission belt 2244, a first clamping block 2245, and a second clamping block 2246. The drive motor 2241 is mounted on the lead room; the drive wheel 2242 is mounted on the lead room, and the drive motor 2241 is connected to the drive wheel 2242; the driven wheel 2243 is mounted on the lead room; the transmission belt 2244 is wound around the drive wheel 2242 and the driven wheel 2243; the first clamping block 2245 clamps one side of the transmission belt 2244, and the first clamping block 2245 is connected to the first lead door 221 via a first connector 2254; the second clamping block 2246 clamps the other side of the transmission belt 2244, and the second clamping block 2246 is connected to the second lead door 222 via a second connector 2255.

[0067] Since the drive belt 2244 connects the driving wheel 2242 and the driven wheel 2243, when the drive motor 2241 is started, the drive motor 2241 drives the driving wheel 2242 to rotate, and the drive belt 2244 and the driven wheel 2243 also rotate. At the same time, the first clamping block 2245 and the second clamping block 2246 clamped on the drive belt 2244 will also rotate synchronously. Since the first clamping block and the second clamping block are respectively installed on the upper and lower sides of the drive belt 2244, the first lead door 221 and the second lead door 222 are closed when the drive motor 2241 drives the driving wheel 2242 to rotate in one direction, and the first lead door 221 and the second lead door 222 are opened when the drive motor 2241 drives the driving wheel 2242 to rotate in the other direction.

[0068] In one embodiment, see Figure 11 and Figure 12 The lead plate shielding housing 200 is provided with a ventilation opening 230 and a cable opening 240. Both the ventilation opening 230 and the cable opening 240 are equipped with protective lead covers 250. The protective lead cover 250 includes a protective lead cover body 251 and a lead baffle assembly 252.

[0069] The protective lead cover body 251 has a protective lead cover 250 cavity 2511, an inlet 2512 and an outlet 2513. The inlet 2512 and the outlet 2513 are both connected to the protective lead cover 250 cavity 2511. The inlet 2512 is connected to the shielding cavity 201. The outlet 2513 corresponds to the ventilation port 230 or the cable port 240. The lead baffle assembly 252 is disposed inside the cavity 2511 of the protective lead cover 250 and near the entrance 2512. The lead baffle assembly 252 includes multiple lead baffles that are staggered in sequence to form a labyrinth structure to prevent radioactive rays from leaking directly from the ventilation port 230 or the cable port 240.

[0070] The radiation shield is installed at the ventilation opening 230 or cable outlet 240 within the cavity of the lead room. A lead baffle assembly 252 is installed within the cavity 2511 of the lead shield body 251. This assembly, consisting of multiple lead baffles forming a labyrinth structure, allows heat and harmful gases generated within the lead room to enter through the inlet 2512 of the lead shield body 251, flow through the labyrinth structure, and exit through the outlet 2513 and ventilation opening 230. This achieves heat exchange and harmful gas removal while effectively preventing radioactive leakage. Similarly, when used at the cable outlet 240, cables passing through the labyrinth structure between the inlet 2512 and outlet 2513 pass through the cable outlet 240, ensuring proper cable passage, heat exchange, and harmful gas removal, while also effectively preventing radioactive leakage and significantly improving the overall radiation shielding performance of the lead room.

[0071] In one embodiment, see Figure 13 and Figure 14 The lead baffle assembly 252 includes a first lead baffle 2521 and a second lead baffle 2522. The first lead baffle 2521 is disposed within the cavity 2511 and is positioned closer to the entrance 2512. A first gap 2523 is reserved between the edge of the first lead baffle 2521 and the inner wall of the protective lead cover body 251. The second lead baffle 2522 is disposed within the cavity 2511 and is positioned on the side of the first lead baffle 2521 away from the entrance 2512. The first lead baffle 2521 and the second lead baffle 2522 are spaced apart. A second gap 2524 is reserved between the edge of the second lead baffle 2522 and the wall of the lead room. The first gap 2523 and the second gap 2524 are staggered, as are the first lead baffle 2521 and the second lead baffle 2522.

[0072] The misalignment of the first gap 2523 and the second gap 2524 results in the misalignment of the first lead baffle 2521 and the second lead baffle 2522, thus forming a maze structure. The maze structure is simple and can effectively prevent the leakage of radioactive rays.

[0073] In one embodiment, see Figure 13 and Figure 14The first lead baffle 2521 and the second lead baffle 2522 are disposed along the width direction of the protective lead cover body 251. One end of the length of the first lead baffle 2521 abuts against and is fixedly connected to one side of the width of the protective lead cover body 251, and one end of the length of the second lead baffle 2522 abuts against and is fixedly connected to the other side of the width of the protective lead cover body 251. The width of both the first lead baffle 2521 and the second lead baffle 2522 is 2 / 3 to 3 / 4 of the thickness of the protective lead cover body 251. The maze structure thus formed is offset along the thickness direction of the protective lead cover body 251.

[0074] In other embodiments, please refer to Figure 13 and Figure 14 The first lead baffle 2521 and the second lead baffle 2522 are disposed along the width of the protective lead cover body 251. One end of the width of the first lead baffle 2521 abuts against and is fixedly connected to one side of the thickness of the protective lead cover body 251, and one end of the width of the second lead baffle 2522 abuts against and is fixedly connected to the other side of the thickness of the protective lead cover body 251. The lengths of the first lead baffle 2521 and the second lead baffle 2522 are both 2 / 3 to 3 / 4 of the width of the protective lead cover body 251. The maze structure thus formed is offset along the width of the protective lead cover body 251.

[0075] In one embodiment, see Figure 13 and Figure 14 The protective lead cover body 251 includes a first side plate 2514, a second side plate 2515, and a third side plate 2516. The first side plate 2514 and the third side plate 2516 are respectively disposed on both sides of the second side plate 2515 and fixedly connected to the second side plate 2515. The first side plate 2514 and the second side plate 2515 are perpendicular to each other, and the third side plate 2516 is perpendicular to the second side plate 2515. The first side plate 2514, the second side plate 2515, and the third side plate 2516 form a U-shape. The protective lead cover body 251 configured in this way can cover the ventilation opening 230 and the cable opening 240, and has a simple structure.

[0076] In one embodiment, see Figure 13 and Figure 14 One end of the first side plate 2514, one end of the second side plate 2515, and one end of the third side plate 2516 are connected by a sealing base plate 2517, and the outlet 2513 is located near one end of the sealing base plate 2517. The sealing base plate 2517 facilitates the smooth discharge of hot air and harmful gases from the outlet 2513.

[0077] In one embodiment, see Figure 13 and Figure 14 The first side plate 2514 is provided with a first connecting part 2518, which is used to connect the radiation shield to the lead room wall; the third side plate 2516 is provided with a second connecting part 2519, which is used to connect the radiation shield to the lead room wall. The arrangement of the first connecting part 2518 and the second connecting part 2519 allows the radiation shield to be stably connected to the lead room wall.

[0078] In one embodiment, see Figure 13 and Figure 14 The first connecting part 2518 is a first flange 2518a, and the first flange 2518a is provided with a first threaded hole 2518b. The second connecting part 2519 is a second flange 2519a, and the second flange 2519a is provided with a second threaded hole 2519b. By engaging screws with the first threaded hole 2518b and the second threaded hole 2519b, the radiation shield is stably connected to the lead room wall and is easy to assemble and disassemble.

[0079] In one embodiment, see Figure 2 and Figure 3 The detection system 300 includes a radiation source 310, a detector 320, a mechanical scanning mechanism 330, a data acquisition and computer system, and an auxiliary system. The radiation source 310 generates high-energy X-rays that penetrate the workpiece to be inspected. The detector 320 receives the attenuated X-rays after penetrating the workpiece and converts them into electrical signals. The mechanical scanning mechanism 330 precisely controls the relative movement between the workpiece and the radiation source 310 and detector 320 during the scanning process. The data acquisition and computer system controls the scanning process, processes the massive amounts of data acquired, performs image reconstruction, provides a human-machine interface, and offers data analysis functions. The auxiliary system ensures stable system operation and safety, including but not limited to an electrical control system, a cooling system, a voltage regulator, and safety interlocking devices. It should be understood that the radiation source 310, detector 320, mechanical scanning mechanism 330, data acquisition and computer system, and auxiliary system are all existing technologies and will not be described in detail here.

[0080] Through the coordinated operation of the X-ray source 310, detector 320, and mechanical scanning mechanism 330, X-ray projection data of the workpiece at different angles are collected. The computer system reconstructs the three-dimensional structural image of the workpiece's interior based on the exponential decay law. The auxiliary system provides electrical, thermal control, and safety assurance for the entire imaging process.

[0081] This embodiment optimizes the design of lead plate thickness. Based on the radiation intensity and protection requirements of industrial CT equipment, the optimal thickness of lead plate in different parts is determined through calculation and actual radiation testing. While ensuring protective performance, the weight and cost of the lead room are reduced as much as possible.

[0082] In one embodiment, the lead plate shielding shell 200 includes a lead plate whose thickness is calculated based on the exponential law of radiation attenuation, taking into account the type and energy of the radiation and the required attenuation factor. The exponential attenuation law is as follows:

[0083] Or its variations are:

[0084] in: ： Unshielded radiation intensity (e.g., dose rate), in units of μSv / h and mSv / h; The residual radiation intensity after passing through the lead plate, in μSv / h and mSv / h. The thickness of the lead plate, in cm; The linear attenuation coefficient of lead for specific energy rays, expressed in cm. -1 The higher the X-ray energy, the smaller the attenuation coefficient and the stronger the penetrating power.

[0085] For X-rays of common energies, the linear attenuation coefficient μ of lead can be obtained from Table 1:

[0086] Table 1 For uncommon energy X-rays (40~450 KeV), the linear attenuation coefficient of lead is... The value cannot be directly found using Table 1; it needs to be calculated using the lead attenuation coefficient calculation formula.

[0087] in: It is the energy of X-rays, measured in KeV; It is the linear attenuation coefficient, with units of: ; It is the mass decay coefficient, with units of cm² / g; This is the density of lead, taken as 11.35 g / cm³.

[0088] In actual lead room design, a 20% to 50% margin is usually added to the theoretically calculated thickness of the lead plate as a safety margin.

[0089] In one embodiment, the relationship between X-ray intensity and distance follows an inverse square law, where the intensity decreases inversely with the square of the distance:

[0090] : indicates a distance of X-ray intensity at that location; : indicates a distance of X-ray intensity at that location; : Indicates the distance from measurement point 1 to the X-ray source; : Indicates the distance from measurement point 2 to the X-ray source.

[0091] In one embodiment, the X-ray intensity is proportional to the tube current and approximately proportional to the square of the tube voltage.

[0092] Please see Figure 16 and Figure 17 This embodiment also provides a radiation safety monitoring method for a self-shielded lead room, applied to the radiation monitoring system 400 described above, including the following steps: Step S100: Real-time acquisition of radiation data and closure status signal, wherein the radiation data includes the internal radiation intensity and external radiation intensity of the lead room, and the closure status signal is the closed status signal of the protective lead door of the lead room. Step S200: Trigger an alarm based on the radiation data and the closed status signal; The conditions for triggering the alarm are as follows: When the radiation intensity inside the lead room exceeds the standard range for normal operation of the detection system, it indicates that there is abnormal exposure of the radiation source, and an alarm is triggered. And / or, if the radiation intensity at the external detection point of the lead room exceeds the background level, it indicates that the shielding effectiveness of the lead room has decreased or there is a leakage point, and an alarm will be triggered; And / or, if the protective lead door of the lead room is not closed, indicating a leak in the lead room, an alarm will be triggered.

[0093] Step S300, Information Transmission: Once any abnormal condition in step S200 is met, the radiation monitoring system 400 will trigger an on-site audible and visual alarm and remotely transmit the alarm information to the central monitoring room.

[0094] In one specific embodiment, the radiation safety monitoring method for a self-shielded lead room includes: Step S100: Real-time acquisition of radiation data and closed status signals, that is, the first radiation detection module 410 and the second radiation detection module 420 respectively acquire the radiation dose rate inside and outside the lead room at a frequency of several times per second, while the access control interlock module 430 continuously feeds back the closed status signal. Step S200, triggering an alarm based on radiation data and closure status signal, including: Step S210: Determine whether the radiation intensity inside the lead room exceeds the standard range when the detection system is operating normally. If so, it indicates that there is abnormal exposure of the radiation source, and proceed to step S300; otherwise, proceed to step S220. Step S220: Determine whether the radiation intensity at the external detection point of the lead room exceeds the background level. If so, it indicates that the shielding effectiveness of the lead room has decreased or there is a leakage point. Proceed to step S300; otherwise, proceed to step S230. Step S230: Determine whether the protective lead door is closed tightly according to the feedback from the access control interlock module. If it is not closed tightly, it indicates that there is a leak in the lead room, and then proceed to step S300.

[0095] Step S300, Information Transmission: Once any abnormal condition in step S200 is met, the system will trigger an on-site audible and visual alarm and remotely transmit the alarm information to the central monitoring room. The triggered alarm will be indicated by a bright light and a high-decibel sound from the on-site audible and visual alarm.

[0096] Experimental verification: To verify the protective performance and practical application effect of the self-shielded lead room 1000, an industrial self-shielded lead room 1000 experimental platform was built for this embodiment. Comprehensive tests were conducted on the radiation shielding performance, structural stability, and flexibility of the lead room. Experimental results show that the self-shielded lead room 1000 can effectively shield the radiation generated by industrial CT equipment, and the radiation dose outside the lead room is far below the national safety limits. The modular structural design allows the lead room to quickly adapt to the testing needs of workpieces of different sizes, greatly improving its flexibility and operability. The intelligent monitoring system can accurately monitor the operating status of the lead room in real time and promptly issue alarm signals in abnormal situations, ensuring the safety of operators.

[0097] A 225kV open-tube X-ray source manufactured by COMET of Switzerland and a portable radiation measuring instrument manufactured by THERMO FISHER of the United States were used to conduct X-ray shielding experiments on the main radiation surface of the lead room.

[0098] Given conditions: test tube voltage 200kV, test tube current 0.5mA, the distance between the lead plate of the refractive surface and the focal point of the radiation source is 155cm. According to national standards, the average dose rate of the public outside the lead room should be I≤2.5μSv / h. (Based on the radiation dose rate reference chart provided by the radiation source manufacturer...) Figure 18As shown), with a tube voltage of 200 kV and a radiation power of 10 W (the tube current can be easily calculated to be 0.05 mA), the reference value for the radiation dose rate at a distance of 0.15 m from the focal point is 1.15 mGy / s, which can be easily calculated.

[0099] Based on the above known conditions and the proportional relationships between X-ray intensity, tube current, tube voltage, and distance, the radiation dose rate at a location with a tube voltage of 200 kV, a tube current of 0.5 mA, and a focal distance of 125 cm from the lead plate of the primary radiation surface can be easily calculated as follows:

[0100] Unit conversion: =107.7 (μSv / s)

[0101] 107.7 (μSv / s) = 387720 (μSv / h)

[0102] From Table 1, we can find that the linear attenuation index μ of lead for 200 KeV X-rays is 11.33. , , Substituting the values ​​into the formula yields the theoretical design thickness of the lead plate: (cm)

[0103] With a 30% safety margin, 1.05 * (1 + 30%) = 1.365, rounded to 1.4cm. Thus, the lead plate thickness of the main radiation surface of the lead room in this embodiment is 1.4cm. The lead plate thickness of other non-main radiation surfaces of the lead room can also be calculated using this method, according to the formula:

[0104] The residual radiation dose rate after shielding with a 1.4cm thick lead plate can be calculated as follows: ( μSv / h ); The radiation source parameters were set to a tube voltage of 200 kV and a tube current of 0.5 mA. The door to the lead room was secured, and after all installation measures were completed, the radiation source was turned on. The radiation dose rate at a distance of 0.1 m from the main radiation surface on the outer side of the lead room was measured using a portable radiation meter. The results are shown in Table 2 below.

[0105] Table 2 The experimental data in Table 2 show that the lead room in this embodiment fully complies with national standards.

[0106] The self-shielded lead room provided in this embodiment can be manufactured modularly, solving the problem that traditional lead rooms are difficult to adapt to the inspection of large-sized workpieces. By combining the main lead room with modular shielding channels, the length and space of the lead room can be flexibly adjusted according to the workpiece size, improving the equipment's versatility and space utilization. Through optimized design of the lead room structure and precise calculation of lead plate thickness, the weight and cost of the lead room are reduced while ensuring radiation protection performance. Simultaneously, a special protective treatment process effectively avoids radiation leakage at the joints and openings of the lead room, improving the reliability of protection. An intelligent monitoring system integrating X-ray intensity detection, sealing monitoring, and automatic alarm functions enables real-time monitoring and early warning of the lead room's operating status, greatly improving the equipment's safety and intelligence level. Furthermore, experiments have verified that this radiation monitoring system 400 has excellent radiation protection performance, flexibility, and safety, effectively solving radiation protection problems during the operation of industrial CT equipment and adapting to the inspection needs of workpieces of different sizes.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-shielded lead room, characterized in that, include: A lead plate shielding housing, wherein the lead plate shielding housing has a shielding cavity; The detection system is disposed within the shielded cavity; A radiation monitoring system, comprising: Control processing module; The first radiation detection module is used to detect whether the radiation intensity inside the lead room exceeds the standard range when the detection system is operating normally. The second radiation detection module is used to detect whether the radiation intensity at the detection point outside the lead room exceeds the background level. Access control interlocking module, which is used to provide feedback on whether the protective lead door is closed tightly; The first radiation detection module, the second radiation detection module, and the access control interlock module are all electrically connected to the control processing module. The control processing module receives signals from the first radiation detection module, the second radiation detection module, and the access control interlock module to perform logical judgments and output control commands. The control processing module is connected to the alarm communication module, which is used to issue a warning signal when an abnormality occurs and push the alarm information to the remote monitoring terminal.

2. The self-shielded lead room according to claim 1, characterized in that, The lead plate shielding housing includes a support frame structure, the support frame structure comprising: Multiple square tubes are used to construct a framework; Multiple lead plates are provided, which are wrapped around the outside of the frame and connected to the frame. Adjacent lead plates are spliced ​​at the square tube. A shielding lead plate is provided in the cavity of the square tube to cover the gaps at the splicing of adjacent lead plates.

3. The self-shielded lead room according to claim 2, characterized in that, The supporting frame structure also includes multiple reinforcing plates, which are installed on the frame and fixedly connected to the frame.

4. The self-shielded lead room according to claim 1, characterized in that, The lead plate shielding housing includes a protective lead door, which comprises: The first lead door has a first lead plate tongue protruding from its closing end; The second lead door has a second lead plate tongue protruding from its closing end; When the first lead door and the second lead door are closed, the first lead plate tongue and the second lead plate tongue overlap to cover the splicing gap at the point where the first lead door and the second lead door meet.

5. The self-shielded lead room according to claim 1, characterized in that, The lead plate shielding housing is provided with ventilation openings and cable ports, and both the ventilation openings and cable ports are equipped with protective lead covers. The protective lead covers include: The protective lead cover body has a protective lead cover cavity, an inlet and an outlet. The inlet and the outlet are both connected to the protective lead cover cavity. The inlet is connected to the shielding cavity, and the outlet corresponds to the ventilation port or the cable port. A lead baffle assembly is disposed within the cavity of the protective lead cover and near the entrance. The lead baffle assembly includes multiple lead baffles arranged in a staggered manner to form a labyrinth structure to prevent radioactive rays from leaking directly from the ventilation opening or the cable opening.

6. The self-shielded lead room according to claim 1, characterized in that, The detection system includes: A radiation source, which generates high-energy X-rays that penetrate the workpiece to be inspected; A detector for receiving X-rays that have attenuated after penetrating a workpiece and converting them into electrical signals; A mechanical scanning mechanism is used to precisely control the relative movement between the workpiece and the X-ray source and detector during the scanning process.

7. The self-shielded lead room according to claim 1, characterized in that, The lead plate shielding shell includes a lead plate whose thickness is based on the exponential law of radiation attenuation, the exponential attenuation law of which is: Or its variations are: in: ： Radiation intensity without shielding; The residual radiation intensity after passing through the lead plate; The thickness of the lead plate; : The linear attenuation coefficient of lead for specific energy rays.

8. The self-shielded lead room according to claim 1, characterized in that, The relationship between X-ray intensity and distance follows the inverse square law: the intensity decreases inversely with the square of the distance. : indicates a distance of X-ray intensity at that location; : indicates a distance of X-ray intensity at that location; : Indicates the distance from measurement point 1 to the X-ray source; : Indicates the distance from measurement point 2 to the X-ray source.

9. A radiation safety monitoring method for self-shielded lead rooms, characterized in that, The radiation monitoring system according to any one of claims 1 to 8 comprises the following steps: Real-time acquisition of radiation data and closure status signals, wherein the radiation data includes the internal radiation intensity and external radiation intensity of the lead room, and the closure status signal is the closed status signal of the protective lead door of the lead room; An alarm is triggered based on the radiation data and the closed status signal; The conditions for triggering the alarm are as follows: When the radiation intensity inside the lead room exceeds the standard range for normal operation of the detection system, it indicates that there is abnormal exposure of the radiation source, and an alarm is triggered. And / or, if the radiation intensity at the external detection point of the lead room exceeds the background level, it indicates that the shielding effectiveness of the lead room has decreased or there is a leakage point, and an alarm will be triggered; And / or, if the protective lead door of the lead room is not closed, indicating a leak in the lead room, an alarm will be triggered.

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