Radiation protection device for camera under irradiation accelerator beam

Abstract

The application relates to the technical field of irradiation accelerators, and discloses an external radiation protection device for a camera under the beam of an irradiation accelerator, which comprises a protective shell, a lead equivalent lining, a camera support, protective glass, heat dissipation fins, a heat dissipation fan, quick-release buckles and a mounting flange, wherein the protective shell is a cylindrical main body made of aluminum alloy, the front end of the main body is provided with a boss-shaped observation window area; the lead equivalent lining is annularly attached to the inner wall of the protective shell; the protective glass is made of quartz glass and is installed on the inner side of the front end boss; the heat dissipation fins are arranged on the outer side of the rear end in a spiral manner at an angle of 45 degrees, and there are twelve heat dissipation fins in total; the heat dissipation fan is installed on the inner side of the rear end; the quick-release buckles are spring structures and are arranged on the two sides of the side face; and the mounting flange is a square flange plate at the rear end. The application can effectively protect the camera under the working environment of the irradiation accelerator, realizes efficient radiation shielding and convenient dismounting and maintenance.

Description

Technical Field

[0001] This invention relates to the field of radiation accelerator technology, specifically to an external radiation protection device for a camera under a radiation accelerator beam. Background Technology

[0002] Irradiation accelerators have wide applications in industrial non-destructive testing, medical radiotherapy, and material irradiation modification. During operation, high-intensity radiation exists in the under-beam region, posing a serious threat to various electronic devices and precision instruments. Cameras, as key devices for real-time monitoring, play a vital role in observation and recording within the irradiation accelerator's operating environment; their reliable operation is crucial for ensuring equipment safety and process control. To ensure the cameras function properly in the irradiation environment, dedicated radiation protection devices are required.

[0003] Existing radiation protection devices typically consist of basic components such as a protective shell, a shielding layer, an observation window, and a heat dissipation structure. The protective shell primarily serves as load-bearing support and provides installation interfaces; the shielding layer often uses lead-containing materials to achieve radiation attenuation; the observation window uses optical materials with good light transmittance; and the heat dissipation structure is used to dissipate the heat generated during equipment operation. There is still room for further optimization in the structural design of existing radiation protection devices. How to achieve better overall performance in terms of radiation shielding effectiveness, heat dissipation, and ease of installation and maintenance to meet the requirements of long-term stable operation under irradiation environments is a technical issue of ongoing concern in this field. Summary of the Invention

[0004] The purpose of this invention is to provide an external radiation protection device for a camera under the irradiation accelerator beam, which can effectively protect the camera in the working environment of the irradiation accelerator, achieving efficient radiation shielding, good heat dissipation performance, and convenient disassembly and maintenance.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An external radiation protection device for a camera under an irradiation accelerator beam includes a protective shell (1), a camera bracket (3), a protective glass (4), heat dissipation fins (5), a mounting flange (7), a cable protection pipe (9), an observation window sealing ring (12), and a cooling fan (13). The protective shell (1) is a cylindrical main structure made of aluminum alloy, with a length-to-diameter ratio of approximately 2:1. The front end of the protective shell (1) is provided with a protruding observation window installation area. The lead equivalent liner (2) is made of lead-containing rubber or lead plate material and is attached to the inner wall of the protective shell (1) in a ring shape. The protective glass (4) is made of quartz glass and is installed on the inside of the protrusion at the front end of the protective shell (1); The observation window sealing ring (12) is made of fluororubber and has a trapezoidal cross-section. It is installed between the protective glass (4) and the protective shell (1). The camera bracket (3) is installed at the center of the axis inside the protective housing (1); The heat dissipation fins (5) are made of aluminum alloy, and there are twelve fins in total, which are arranged in a spiral at a 45-degree angle on the outer rear end of the protective shell (1). The cooling fan (13) is an axial fan structure and is installed on the inner side of the rear end of the protective shell (1); The shielding cover (11) is installed at the far end of the rear end of the protective shell (1); The mounting flange (7) is a rear square flange structure, which is fixedly connected to the wall or equipment by the four corner fixing bolts (8); the quick-release buckle (10) is a spring buckle structure, with two in total, which are respectively installed on both sides of the protective shell (1); the positioning pin (14) is made of stainless steel, with two in total, which are installed at the mating position of the protective glass (4) and the protective shell (1); The cable protection tube (9) is a stainless steel braided flexible tube structure, which extends from the bottom of the protective shell (1).

[0006] Preferably, the protective housing (1) has an installation groove on the inner side wall of the front end boss, and the protective glass (4) is embedded in the installation groove.

[0007] Preferably, the outer edge of the protective glass (4) is provided with a chamfered structure.

[0008] Preferably, a sealing ring (6) is installed at the connection interface between the protective shell (1) and the mounting flange (7), and the sealing ring (6) is made of silicone.

[0009] Preferably, the height of the heat dissipation fins (5) is about 15 percent of the diameter of the protective shell (1), and the included angle between adjacent heat dissipation fins (5) is about 30 degrees.

[0010] Preferably, the quick-release buckle (10) includes a buckle body and a return spring. The buckle body has an L-shaped structure with a width of 30 mm and a height of 20 mm.

[0011] Preferably, the outer end of the cross arm of the buckle body is provided with anti-slip texture.

[0012] Preferably, the mounting flange (7) is a square structure with bolt holes at the four corners, and the fixing bolt (8) is an M6 socket head cap screw.

[0013] Preferably, the positioning pin (14) has a cylindrical shape and its outer diameter matches the positioning holes opened on the protective shell (1) and the protective glass (4).

[0014] Preferably, the heat dissipation fins (5) are fixedly connected to the rear outer wall of the protective shell (1) by welding.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. This external radiation shielding device for the camera under the irradiation accelerator beam absorbs radiation energy and effectively attenuates radiation intensity through the lead-equivalent inner liner, achieving a highly efficient radiation shielding effect. The combination of heat dissipation fins and a cooling fan drives airflow and increases the heat dissipation area, allowing heat to be dissipated to the external environment, effectively solving the problem of poor heat dissipation in existing technologies. The quick-release buckle design allows for one-handed unlocking, enabling disassembly without tools and significantly improving ease of installation and maintenance. The combination of quartz glass protective glass and a fluororubber observation window sealing ring ensures both light transmittance and airtightness of the observation area. The overall structure is compact, and the aluminum alloy protective shell controls overall weight while ensuring strength, meeting the requirements for long-term stable operation under irradiation conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the exploded disassembly structure according to an embodiment of this application; Figure 3 This is a schematic cross-sectional view of the overall structure according to an embodiment of this application; Figure 4 This is a partially enlarged structural schematic diagram according to an embodiment of this application; Figure 5 This is a partially enlarged structural schematic diagram according to an embodiment of this application; Figure 6 Here is a detailed drawing of the quick-release buckle structure according to an embodiment of this application; Figure 7 This is a schematic diagram of the protective housing structure according to an embodiment of this application.

[0017] The components include: 1. Protective outer shell; 2. Lead equivalent inner lining; 3. Camera bracket; 4. Protective glass; 5. Heat dissipation fins; 6. Sealing ring; 7. Mounting flange; 8. Fixing bolts; 9. Cable protection pipe; 10. Quick-release buckle; 11. Shielding cover; 12. Observation window sealing ring; 13. Cooling fan; 14. Positioning pin. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 7 This invention provides an external radiation protection device for a camera under an irradiation accelerator beam. The various components of this device work together to achieve the technical objective of effectively protecting the camera in the working environment of an irradiation accelerator.

[0020] like Figure 1 As shown, the overall external structure of this invention is cylindrical. The protective shell 1 serves as the main load-bearing structure, with a raised observation window mounting area at its front end. This raised area is used to install the protective glass 4 for observation. A square mounting flange 7 is located at the rear end of the protective shell 1, and the four corners of the flange 7 are fixedly connected to a wall or equipment using bolts 8. Two quick-release clips 10 are located on the side of the protective shell 1 for quick disassembly and one-handed operation. A cable protection pipe 9 is located at the bottom of the protective shell 1, extending from the bottom of the device towards the control room to protect the cable lines. Heat dissipation fins 5 are located on the outer rear end of the protective shell 1, arranged in a spiral pattern to increase the heat dissipation area and improve heat dissipation efficiency.

[0021] like Figure 2 and Figure 3 As shown, the internal structure of this invention adopts a layered design, with each component assembled sequentially along the device axis. From the exploded view, from right to left, the components are: cable protection pipe 9, protective glass 4, observation window sealing ring 12, sealing ring 6, protective outer shell 1, lead equivalent liner 2, camera bracket 3, cooling fan 13, heat dissipation fins 5, shielding cover plate 11, positioning pin 14, mounting flange 7, fixing bolt 8, and quick-release buckle 10. The overall sectional view shows that the lead equivalent liner 2 is annularly fitted onto the inner wall of the protective outer shell 1. The camera bracket 3 is located at the center of the device axis, with the protective glass 4 and observation window sealing ring 12 sequentially positioned at the front end, and the heat dissipation fins 5 and shielding cover plate 11 sequentially positioned at the rear end. The sealing ring 6 is located at key connection points of the main structure to ensure airtightness.

[0022] The protective housing 1 is the main load-bearing structure of this device, and is made of aluminum alloy in one piece. The protective housing 1 has a cylindrical shape, with a length-to-diameter ratio of approximately 2:1. This proportion ensures sufficient internal space to accommodate internal components such as the camera bracket 3 and the lead equivalent inner liner 2, while maintaining a compact overall structure to adapt to limited installation space. The front end of the protective housing 1 has a protruding observation window mounting area. The protrusion is recessed inward to form a mounting groove, in which the protective glass 4 is embedded. The outer edge of the protrusion has a chamfered structure to facilitate the installation and positioning of the protective glass 4, while avoiding potential safety hazards from sharp corners. The rear opening of the protective housing 1 is fixedly connected to the mounting flange 7, and a snap-fit ​​mounting groove is provided on the side for installing quick-release clips 10. The outer rear wall of the protective housing 1 has a fin welding area, where heat dissipation fins 5 are fixedly connected by welding. The bottom of the protective housing 1 has a cable penetration hole, through which the inlet end of the cable protection pipe 9 passes and is fixedly connected to the protective housing 1. The protective shell 1 is made of aluminum alloy, which is lightweight, high-strength, and corrosion-resistant. It effectively controls the overall weight while ensuring structural strength, making it easy to handle and install.

[0023] The lead equivalent liner 2 is the radiation shielding layer of this device, made of lead-containing rubber or lead plate. For example... Figure 2 and Figure 3 As shown, the lead equivalent liner 2 has an annular cylindrical structure, with its outer diameter matching the inner diameter of the protective shell 1. It is attached to and tightly fitted to the inner wall of the protective shell 1. The thickness of the lead equivalent liner 2 is determined according to the radiation shielding requirements. Its annular structure completely covers the inner wall area of ​​the protective shell 1, effectively absorbing radiation energy and attenuating radiation intensity during radiation irradiation, thereby achieving a highly efficient radiation shielding effect. The front edge of the lead equivalent liner 2 is located behind the protective glass 4, and the rear edge extends to the area adjacent to the camera bracket 3, ensuring that radiation cannot bypass the shielding layer from the side. When the lead equivalent liner 2 is made of lead-containing rubber, it has good flexibility, making it easy to bend and fit the inner wall; when made of lead plate, it has higher density and shielding efficiency, and can be selected according to the actual radiation intensity requirements.

[0024] The camera bracket 3 is used to fix and support the camera body, and is located at the center of the axis inside the protective housing 1. Figure 2 and Figure 3As shown, the axis of the camera bracket 3 coincides with the axis of the protective housing 1. After the camera body is fixedly mounted on the camera bracket 3, its optical axis is aligned with the axis of the protective housing 1, thereby ensuring that the observed image obtained by the camera through the protective glass 4 has the correct viewing angle and clarity. The structural form of the camera bracket 3 can be adapted to the actual camera model used. Its bottom is fixedly connected to the inner bottom wall of the protective housing 1 to ensure stability. The top of the camera bracket 3 is provided with a camera mounting position, which can be connected by screws, snap-fit ​​connections, or universal threaded interfaces to adapt to different specifications of camera products. The external dimensions of the camera bracket 3 match the inner diameter of the protective housing 1, and sufficient space is reserved to accommodate the lead equivalent liner 2 and internal wiring while ensuring support strength.

[0025] The protective glass 4 is made of quartz glass and is installed inside the protrusion at the front end of the protective housing 1. For example... Figure 1 , Figure 2 and Figure 4 As shown, the protective glass 4 has a circular flat plate structure, the diameter of which matches the inner diameter of the mounting groove of the boss, and is embedded in the mounting groove. The outer edge of the protective glass 4 is provided with a chamfered structure, the chamfer angle is about 45 degrees. This design facilitates the positioning operation during installation and avoids stress concentration at the glass edge. The thickness of the protective glass 4 is determined according to the requirements of radiation resistance and mechanical strength. Quartz glass material has the characteristics of high light transmittance, radiation resistance, and good chemical stability, which can operate stably for a long time under irradiation environment and ensure the clarity of observation. The front surface of the protective glass 4 is in contact with the external environment of the device, and the rear surface abuts against the observation window sealing ring 12. Figure 4 As shown in the enlarged view, after the protective glass 4 is installed inside the boss, its edge forms an effective seal with the trapezoidal cross section of the observation window sealing ring 12, preventing moisture, dust and other impurities from entering the device.

[0026] The observation window sealing ring 12 is made of fluororubber, with a trapezoidal cross-section, and is installed at the mating position between the protective glass 4 and the protective housing 1. Figure 2 , Figure 3 and Figure 4 As shown, the observation window sealing ring 12 is fitted onto the outer edge of the protective glass 4. The two beveled sides of the trapezoidal cross-section form surface contact with the rear surface of the protective glass 4 and the inner wall of the protrusion of the protective shell 1, respectively, thereby achieving an airtight seal in the front area. Fluororubber material has excellent radiation resistance, maintaining elasticity and sealing performance under irradiation conditions, and is not prone to aging, cracking, or failure. The trapezoidal cross-section design of the observation window sealing ring 12 increases the sealing contact area, improving sealing reliability. Simultaneously, the trapezoidal structure has a self-tightening sealing effect, maintaining a good sealing state even when the internal air pressure changes. The observation window sealing ring 12 is continuously arranged around the edge of the protective glass 4, forming a complete sealing structure with the protective glass 4.

[0027] Sealing ring 6 is made of silicone and is installed at key connection points of the main structure to ensure overall airtightness. For example... Figure 2 and Figure 3 As shown, the sealing ring 6 is located at the connection interface between the protective housing 1 and the mounting flange 7, fitted around the outer periphery of the connecting bolts or embedded in the connecting groove. The silicone material has good elasticity and resilience, capable of filling irregular gaps in the connection area and preventing gas or liquid leakage. The structure of the sealing ring 6 can be adapted to the geometry of the specific connection area; its cross-section can be circular, rectangular, or irregular to achieve the best sealing effect.

[0028] The heat dissipation fins 5 are made of aluminum alloy, and there are twelve fins in total, arranged in a spiral at a 45-degree angle on the outer rear end of the protective shell 1. Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, each heat dissipation fin 5 is a long strip structure, with its length direction arranged radially along the protective shell 1 and its height direction perpendicular to the outer wall of the protective shell 1. The height of the heat dissipation fin 5 is approximately 15% of the diameter of the protective shell 1. This height design increases the heat dissipation area while maintaining the compactness of the overall structure. The twelve heat dissipation fins 5 are evenly distributed circumferentially along the rear end of the protective shell 1, with an angle of approximately 30 degrees between adjacent heat dissipation fins 5. Each heat dissipation fin 5 is fixedly connected to the rear end outer wall of the protective shell 1 by welding. The welding position is located in the root area of ​​the heat dissipation fin 5, and the weld seam is continuous and evenly distributed, ensuring connection strength and thermal conductivity efficiency. The windward surface of the heat dissipation fin 5 is arranged at a 45-degree angle to the axis of the device. This inclined angle design allows airflow to form turbulence when passing over the surface of the heat dissipation fin 5, thereby increasing the contact time between the air and the fin surface and the heat transfer coefficient, effectively improving the heat dissipation efficiency. The twelve heat dissipation fins are arranged in a spiral shape, which looks like propeller blades. This structural design not only increases the heat dissipation area, but also uses the tangential force of airflow to guide heat to diffuse outward.

[0029] The cooling fan 13 is an axial fan structure, installed on the inner rear end of the protective housing 1. For example... Figure 2 and Figure 5As shown, the housing of the cooling fan 13 is fixedly installed in the rear internal region of the protective shell 1, and its rotating shaft coincides with the axis of the device. When the cooling fan 13 is working, it drives air to flow along the axial direction. The air enters the device from the rear end, flows past the heat-generating components, and is discharged from the front end, carrying the heat out of the device. The speed and airflow of the cooling fan 13 are selected according to the heat dissipation requirements to ensure that the heat generated under irradiation can be dissipated in a timely manner. The power cord and control signal line of the cooling fan 13 are connected to the cable protection pipe 9 through an internal wiring channel, and are uniformly led out to the control room for power supply and speed control. The cooling fan 13 is installed in the space between the shielding cover plate 11 and the rear opening of the protective shell 1, with its air inlet facing the shielding cover plate 11 and its air outlet facing the front end of the device. Figure 5 As shown in the enlarged view, the cooling fan 13 is fixed to the inner wall of the protective shell 1 by a bracket or mounting clip, and the installation position avoids the arrangement area of ​​the lead equivalent liner 2 and the camera bracket 3.

[0030] The shielding cover 11 is installed at the very rear end of the protective housing 1, serving as a sealing cover for the rear area. For example... Figure 2 , Figure 3 and Figure 5 As shown, the shielding cover 11 has a circular flat plate structure, and its diameter matches the inner diameter of the rear opening of the protective housing 1. The rear surface of the shielding cover 11 abuts against the front surface of the mounting flange 7, and the front surface faces the air inlet of the cooling fan 13. Mounting holes are provided in the peripheral area of ​​the shielding cover 11. Fixing bolts 8 are passed through the bolt holes of the mounting flange 7 and connected to the shielding cover 11, firmly fixing the shielding cover 11 to the rear end of the protective housing 1. The shielding cover 11 is made of aluminum alloy or stainless steel, ensuring both structural strength and providing a certain degree of radiation shielding. A sealing ring 6 is provided between the shielding cover 11 and the rear opening of the protective housing 1 to ensure airtightness. Simultaneously, the shielding cover 11 seals the rear opening, preventing radiation leakage from the rear and preventing external contaminants from entering the device.

[0031] The mounting flange 7 is a rear-end square flange structure and is a key component for fixing this device to the wall or equipment. The mounting flange 7 has a square shape, with its side length exceeding the outer diameter of the protective housing 1. A connection hole, matching the rear end of the protective housing 1, is formed in the central area of ​​the mounting flange 7. Bolt holes are located at the four corners of the mounting flange 7, and four fixing bolts 8 pass through these holes to connect to pre-drilled threaded holes on the wall or equipment, thus securing the device. The front surface of the mounting flange 7 is fixedly connected to the rear end face of the protective housing 1 by welding or bolting, with a sealing ring 6 at the connection point to ensure airtightness. The mounting flange 7 is made of aluminum alloy or carbon steel, with its thickness determined according to load-bearing requirements to ensure a stable connection during long-term operation. The square structure design of the mounting flange 7 ensures a unique installation direction, facilitating positioning and alignment during on-site installation.

[0032] The fixing bolts 8 are M6 socket head cap screws, with four bolts installed at the four corners of the mounting flange 7. Each fixing bolt 8 has a socket head cap head for easy tightening with an Allen wrench, and the bolt tail has external threads to be screwed into pre-drilled holes in the wall or equipment for a secure connection. The fixing bolts 8 are M6 × length, with the bolt length determined by the thickness of the mounting flange 7 and the depth of the pre-drilled hole to ensure sufficient connection strength. The heads of the fixing bolts 8 are recessed into the countersunk holes of the mounting flange 7 to prevent the bolt heads from protruding from the surface of the mounting flange 7 and affecting its appearance or interfering with other components.

[0033] The quick-release latches 10 are spring-loaded latches, with two installed on either side of the protective housing 1. Each quick-release latch 10 includes a latch body and a return spring. The latch body is L-shaped, approximately 30 mm wide and 20 mm high. The horizontal arm of the latch body is the pressing area, with anti-slip texture on the outer end for easy finger pressing. The vertical arm of the latch body is the locking area, with a hook structure on the inner end that engages with a slot on the side of the protective housing 1 to achieve the locking function. The return spring is installed inside the latch body, with one end fixed to the latch body's mounting base and the other end connected to a movable component. When a finger presses the horizontal arm of the latch body, the movable component moves downward and compresses the return spring, causing the hook to move inward and disengage from the slot, thus unlocking. When the finger is released, the return spring releases its elastic potential energy, pushing the movable component back to its original position, and the hook re-engages in the slot to lock. Two quick-release clips 10 are respectively installed in the clip mounting slots on the left and right sides of the protective shell 1, and their symmetrical arrangement ensures a uniform distribution of locking force. The structural design of the quick-release clips 10 enables the unlocking operation to be completed with a single hand press, allowing for quick disassembly and maintenance of the device without the use of any tools.

[0034] The cable protection conduit 9 is a stainless steel braided flexible conduit that extends from the bottom of the protective housing 1 and connects to the control room. The inlet end of the cable protection conduit 9 passes through a cable perforation at the bottom of the protective housing 1 and is fixedly connected to the housing 1, with a sealing structure at the connection point to prevent moisture ingress. The middle section of the cable protection conduit 9 is laid along the wall or equipment surface, with the routing path determined according to the actual site conditions. The outer sheath of the cable protection conduit 9 is a stainless steel braided layer, providing good flexibility, tensile strength, and electromagnetic shielding performance. The outlet end of the cable protection conduit 9 extends towards the control room and connects to the terminal box or equipment interface inside the control room. The structural design of the stainless steel braided flexible conduit effectively protects the internal cables from mechanical damage, electromagnetic interference, and radiation, while also facilitating bending and routing adjustments to adapt to complex site environments.

[0035] The positioning pins 14 are made of stainless steel and are located in two places, installed at the mating positions of the protective glass 4 and the protective housing 1. Each positioning pin 14 has a cylindrical shape, and its outer diameter matches the positioning holes on the inner wall of the boss in the protective housing 1 and the protective glass 4. During installation, the positioning pins 14 are first inserted into the positioning holes on the inner wall of the boss in the protective housing 1. After the positioning holes on the protective glass 4 are aligned with the positioning pins 14, the glass is fitted onto the positioning pins 14. Then, the position of the protective glass 4 is fixed by the observation window sealing ring 12 and the clamping structure. The positioning pins 14 ensure the assembly accuracy of the protective glass 4 during installation, ensuring that the center of the protective glass 4 is precisely aligned with the axis of the device, and ensuring that the image acquired by the camera is not skewed. The positioning pins 14 are made of stainless steel, which has good corrosion resistance and mechanical strength, and can maintain dimensional stability for a long time under irradiation.

[0036] When the radiation protection device for the camera under the irradiation accelerator beam of the present invention is operating in the working environment of the irradiation accelerator, the various components work together to achieve technical functions such as radiation shielding, heat dissipation, observation and convenient maintenance.

[0037] Radiation shielding working principle: When the irradiation accelerator generates radiation and irradiates this device, the external radiation first comes into contact with the protective outer shell 1. The aluminum alloy material of the protective outer shell 1 has a certain attenuation effect on low-energy radiation. After penetrating the protective outer shell 1, the radiation reaches the lead equivalent liner 2. The lead equivalent liner 2 is made of lead-containing rubber or lead plate material. Its high-density lead-containing material can effectively absorb and neutralize radiation energy, attenuating the radiation intensity to below a safe level. The lead equivalent liner 2 is attached to the inner wall of the protective outer shell 1 in a ring structure, achieving 360-degree radiation shielding without blind spots. Radiation cannot bypass the lead equivalent liner 2 from any direction to reach the internal camera bracket 3 and camera body. The front edge of the lead equivalent liner 2 is located behind the protective glass 4, and the rear edge extends to the area adjacent to the camera bracket 3, achieving complete lateral coverage and ensuring the integrity of radiation shielding. After the radiation energy is absorbed by the lead equivalent liner 2, it is converted into heat energy. This heat is transferred to the protective outer shell 1 through heat conduction and then dissipated to the external environment through the heat dissipation system.

[0038] Heat dissipation working principle: The heat dissipation system of this device consists of a cooling fan 13 and heat dissipation fins 5, which work together to achieve efficient heat dissipation. The cooling fan 13 is installed on the inner rear end of the protective shell 1 and acts as an active heat dissipation element to drive airflow. After the cooling fan 13 is started, air enters the device from the front end along the axial direction, flows through the lead equivalent inner liner 2, camera bracket 3, and camera body, and is heated. The hot air continues to flow to the rear and is drawn in by the cooling fan 13. The impeller of the cooling fan 13 throws the hot air outward and discharges it through the rear opening into the space between the shielding cover 11 and the protective shell 1. At the same time, the heat dissipation fins 5 act as passive heat dissipation elements to increase the heat dissipation area. Twelve heat dissipation fins 5 are spirally arranged at a 45-degree angle on the outer rear end of the protective shell 1. Each heat dissipation fin 5 is tightly welded to the outer rear end wall of the protective shell 1, and heat is transferred from the inner wall of the protective shell 1 to the heat dissipation fins 5 through the weld. The air-facing surface of the heat dissipation fins 5 is arranged at a 45-degree angle to the axial direction. When air flows over the surface of the heat dissipation fins 5, turbulence is formed, increasing the contact time between the air and the fin surface and the heat transfer coefficient. Heat is dissipated to the external environment through the surface of the heat dissipation fins 5, achieving efficient heat transfer. The coordinated design of the cooling fan 13 and the heat dissipation fins 5 ensures that heat can be continuously and stably removed from the inside of the device, ensuring the thermal balance of the device during long-term stable operation under irradiation.

[0039] Working Principle: The device features a protective glass 4 at its front end, serving as a quartz glass observation window to allow light to pass through and ensure clear observation. The protective glass 4 is embedded in the mounting groove of the boss at the front of the protective housing 1, with a chamfered edge to facilitate light entry. The quartz glass material of the protective glass 4 has high light transmittance and stable optical performance, enabling clear image display of the monitored area. The camera body is mounted on a camera bracket 3, which is positioned at the center of the device's axis, ensuring alignment between the camera's optical axis and the axis of the protective housing 1. The camera acquires visible light images of the monitored area through the protective glass 4, and the image signal is transmitted to the control room for display and recording via a signal line within the cable protection conduit 9. A sealing ring 12 for the observation window is installed between the protective glass 4 and the inner wall of the boss in the protective housing 1. The trapezoidal cross-section sealing ring, made of fluororubber, forms an effective seal with the edge of the protective glass 4, preventing moisture, dust, and impurities from entering the device and affecting observation clarity and equipment lifespan.

[0040] Airtightness Guarantee Principle: This device employs a multi-layer sealing design to ensure overall airtightness. The observation window sealing ring 12 is installed between the protective glass 4 and the inner wall of the protrusion of the protective housing 1. Made of fluororubber, it possesses excellent resilience and radiation resistance, maintaining a stable sealing effect during long-term operation. The sealing ring 6 is installed at the connection interface between the protective housing 1 and the mounting flange 7. The silicone sealing ring fills the irregular gaps at the connection point, preventing gas or liquid leakage. The inlet end of the cable protection pipe 9, where it connects to the bottom of the protective housing 1, also features a sealing structure to prevent external moisture from entering the device through the cable perforation. The shielding cover 11 is installed at the very end of the rear of the protective housing 1, forming a sealed fit with the rear opening of the protective housing 1. The synergistic effect of this multi-layer sealing design ensures that the device can effectively block the intrusion of external moisture, dust, and contaminants under irradiation conditions, protecting the normal operation of the internal camera and electronic components.

[0041] The assembly and disassembly processes of this invention are described in detail below.

[0042] Assembly Process: The assembly of this invention is performed sequentially from the inside out and from back to front. First, the lead equivalent liner 2 is fitted onto the inner wall of the protective shell 1, with the annular structure of the lead equivalent liner 2 tightly fitting against the inner wall of the protective shell 1. Then, the camera bracket 3 is installed at the center of the axis inside the protective shell 1, with the bottom of the camera bracket 3 fixedly connected to the inner bottom wall of the protective shell 1. Next, the cooling fan 13 is installed at a designated position on the inner rear end of the protective shell 1, with the housing of the cooling fan 13 fixed to the inner wall of the protective shell 1 via a bracket. Subsequently, twelve heat dissipation fins 5 are sequentially welded to the outer rear end of the protective shell 1. The heat dissipation fins 5 are arranged in a spiral at a 45-degree angle, with the welding position located at the root area of ​​each heat dissipation fin 5, and the weld seams are continuous and evenly distributed. After welding, the connection strength between the heat dissipation fins 5 and the protective shell 1 is checked. Subsequently, the mounting flange 7 is fixedly connected to the rear end of the protective housing 1. A sealing ring 6 is provided between the mounting flange 7 and the protective housing 1 to ensure airtightness. The four corners are pre-tightened with fixing bolts 8. Then, two positioning pins 14 are respectively installed in the positioning holes opened on the inner side wall of the boss of the protective housing 1, with the outer diameter of the positioning pin 14 tightly fitting the positioning hole. Next, the observation window sealing ring 12 is fitted onto the outer edge of the protective glass 4, with the trapezoidal cross-section of the observation window sealing ring 12 matching the edge shape of the protective glass 4. The protective glass 4, along with the observation window sealing ring 12, is installed into the mounting groove of the boss at the front end of the protective housing 1. The positioning hole on the protective glass 4 is aligned with the positioning pin 14, and then fitted onto the positioning pin 14, confirming that the installation position of the protective glass 4 is correct. Then, the shielding cover 11 is installed at the very end of the rear end of the protective housing 1, with the rear surface of the shielding cover 11 abutting against the front surface of the mounting flange 7. The shielding cover 11 is fixed with fixing bolts 8 passing through the bolt holes of the mounting flange 7. Finally, install the two quick-release clips 10 into the clip mounting slots on the left and right sides of the protective housing 1, respectively, and confirm that the locking function of the clips is normal. Install the inlet end of the cable protection tube 9 into the cable penetration hole at the bottom of the protective housing 1, with a sealing structure at the connection. After completing the above assembly steps, perform an overall airtightness test and functional test to confirm that all performance indicators of the device meet the requirements.

[0043] Disassembly Process: The disassembly process is the reverse of the assembly process, proceeding sequentially from the outside to the inside and from front to back. First, press the quick-release clips 10 on both sides. Under external force, the horizontal arm moves downward and compresses the internal return spring, causing the hook to move inward and disengage from the slot on the side of the protective housing 1, thus unlocking the device. After both quick-release clips 10 are unlocked, the entire device can be removed from the front end or further disassembly operations can be performed. If further disassembly is required for maintenance or replacement of internal components, the following steps can be followed: First, loosen the fixing bolts 8 and remove the shielding cover 11 from the rear end of the protective housing 1. Then, remove the cooling fan 13 from the rear end, taking care to avoid damaging the power cord and signal cable. Next, peel off the lead equivalent liner 2 from the inner wall of the protective housing 1. The lead equivalent liner 2 can be removed as a whole for inspection or replacement. Then, remove the camera body from the camera bracket 3 and remove the camera bracket 3 from inside the protective housing 1. Subsequently, remove the protective glass 4 and the observation window sealing ring 12 from the front end of the protective housing 1, and pull out the positioning pin 14 to complete the complete disassembly of the front end area. Finally, loosen the connection between the mounting flange 7 and the protective housing 1, remove the mounting flange 7, and take out the sealing ring 6. Handle each component gently during disassembly to avoid damage. After disassembly, clean, inspect, and repair each component as needed, then reassemble in reverse order.

[0044] How to use the quick-release clip 10: The quick-release clip 10 is a spring-loaded clip structure, which is simple and quick to operate. During installation, align the protective housing 1 with the installation position. The hook of the clip body will automatically engage in the corresponding slot and make a clicking sound, indicating successful locking. During disassembly, the user holds the protective housing 1 with one hand and presses the horizontal arm of one of the quick-release clips 10 with their thumb or other fingers to a depth of approximately 30% to 50% of the clip height. At this point, the return spring is compressed, and the hook moves inward and disengages from the slot. Continue to press and pull the device outward, while simultaneously pressing the other quick-release clip 10 to unlock it as well. Once both clips are unlocked, the device can be completely removed. This one-handed operation design greatly simplifies the disassembly process, allowing for quick and easy disassembly without the need for any tools, facilitating on-site maintenance and equipment replacement.

[0045] Installation and usage method: The mounting flange 7 of this invention is fixedly connected to the wall or equipment using four corner fixing bolts 8. For example... Figure 7As shown, before installation, first determine the installation location on the wall or equipment surface, and use a level to correct the horizontality of the mounting flange 7 to ensure the device is installed vertically. Align the pre-drilled threaded holes on the wall or equipment with the four bolt holes of the mounting flange 7, insert the four fixing bolts 8, and pre-tighten them one by one with an Allen wrench, then gradually tighten them to the specified torque in a diagonal sequence. After fixing, check the fit between the mounting flange 7 and the wall or equipment to ensure there are no gaps. The cable protection pipe 9 is led out from the bottom of the device and runs along the wall to the control room. The laying path of the cable protection pipe 9 should avoid high-temperature areas and areas with strong magnetic field interference. Use pipe clamps or brackets to fix its direction, and the bending radius should not be less than six times the outer diameter of the cable protection pipe 9 to prevent damage to the internal cables. After the device is installed, conduct a power-on test to confirm that the cooling fan 13 is operating normally, the camera image is clear, and the signal transmission is stable.

[0046] The external radiation protection device for cameras under irradiation accelerator beams of the present invention achieves the following technical effects through the structural design and cooperation of the above-mentioned components: In terms of radiation shielding, the lead equivalent liner 2, made of lead-containing rubber or lead plate, is annularly attached to the inner wall of the protective shell 1. During radiation irradiation, it effectively absorbs radiation energy and attenuates radiation intensity, achieving a highly efficient radiation shielding effect. The protective shell 1, made of aluminum alloy, controls the overall weight while ensuring strength, enabling it to meet the requirements of long-term stable operation under irradiation conditions.

[0047] In terms of heat dissipation performance, the cooling fan 13 is installed on the inner rear end of the protective shell 1 to drive airflow, and heat is dissipated to the external environment through the heat dissipation fins 5. The twelve heat dissipation fins 5 are arranged in a spiral at a 45-degree angle on the outer rear end of the protective shell 1. The spiral arrangement design increases the heat dissipation area and improves the heat dissipation efficiency, effectively solving the problem of poor heat dissipation in the prior art.

[0048] In terms of disassembly and maintenance, the two quick-release buckles 10 on the side are spring-loaded buckle structures, which can be unlocked by pressing with one hand. Disassembly can be completed without the assistance of tools, greatly improving the convenience of disassembly and maintenance.

[0049] In terms of observation function, the combination of the quartz glass protective glass 4 and the fluororubber observation window sealing ring 12 ensures the light transmittance and airtightness of the observation area, and the camera bracket 3 is located in the center of the device axis to ensure the correctness of the observation angle.

[0050] In terms of cable protection, the cable protection pipe 9 adopts a stainless steel braided flexible hose structure and is led out from the bottom of the device to the control room, effectively protecting the internal cables from mechanical damage and radiation.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external radiation protection device for a camera under an irradiated accelerator beam, characterized in that: It includes a protective shell (1), a camera bracket (3), a protective glass (4), heat dissipation fins (5), the mounting flange (7), a cable protection pipe (9), an observation window sealing ring (12), and a cooling fan (13). The protective shell (1) is a cylindrical main structure made of aluminum alloy, with a length-to-diameter ratio of approximately 2:

1. The front end of the protective shell (1) is provided with a protruding observation window installation area. The lead equivalent liner (2) is made of lead-containing rubber or lead plate material and is attached to the inner wall of the protective shell (1) in a ring shape. The protective glass (4) is made of quartz glass and is installed on the inside of the protrusion at the front end of the protective shell (1); The observation window sealing ring (12) is made of fluororubber and has a trapezoidal cross-section. It is installed between the protective glass (4) and the protective shell (1). The camera bracket (3) is installed at the center of the axis inside the protective housing (1); The heat dissipation fins (5) are made of aluminum alloy, and there are twelve fins in total, which are arranged in a spiral at a 45-degree angle on the outer rear end of the protective shell (1). The cooling fan (13) is an axial fan structure and is installed on the inner side of the rear end of the protective shell (1); The shielding cover (11) is installed at the far end of the rear end of the protective shell (1); The mounting flange (7) is a rear square flange structure, which is fixedly connected to the wall or equipment by the four corner fixing bolts (8); the quick-release buckle (10) is a spring buckle structure, with two in total, which are respectively installed on both sides of the protective shell (1); the positioning pin (14) is made of stainless steel, with two in total, which are installed at the mating position of the protective glass (4) and the protective shell (1); The cable protection tube (9) is a stainless steel braided flexible tube structure, which extends from the bottom of the protective shell (1).

2. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 1, characterized in that: The protective shell (1) has an installation groove on the inner side wall of the front boss, and the protective glass (4) is embedded in the installation groove.

3. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 2, characterized in that, The outer edge of the protective glass (4) is provided with a chamfered structure.

4. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 1, characterized in that, A sealing ring (6) is installed at the connection interface between the protective shell (1) and the mounting flange (7), and the sealing ring (6) is made of silicone.

5. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 1, characterized in that, The height of the heat dissipation fins (5) is approximately 15 percent of the diameter of the protective shell (1), and the included angle between adjacent heat dissipation fins (5) is approximately 30 degrees.

6. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 1, characterized in that, The quick-release buckle (10) includes a buckle body and a reset spring. The buckle body has an L-shaped structure with a width of 30 mm and a height of 20 mm.

7. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 6, characterized in that, The outer end of the cross arm of the buckle body is provided with anti-slip texture.

8. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 1, characterized in that, The mounting flange (7) is a square structure with bolt holes at the four corners. The fixing bolt (8) is an M6 hexagon socket head cap screw.

9. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 1, characterized in that, The positioning pin (14) has a cylindrical shape, and its outer diameter matches the positioning holes opened on the protective shell (1) and the protective glass (4).

10. The external radiation protection device for a camera under an irradiated accelerator beam according to claim 1, characterized in that, The heat dissipation fins (5) are fixedly connected to the rear outer wall of the protective shell (1) by welding.

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