High performance radiation protection, electromagnetic shielding integrated waveguide vent

Abstract

This invention relates to the field of air conditioning and ventilation technology, and particularly to a high-performance waveguide vent integrating radiation protection and electromagnetic shielding. It includes a stainless steel plate silencing plenum box, which is sequentially connected to a right-angle elbow of a duct, an insulated flexible duct, an electrically operated airtight butterfly valve, and supply and exhaust ducts. A flange is installed around the lower perimeter of the plenum box, and a double-bend or single-bend waveguide is installed on the inner bottom side. A detachable ceiling vent panel is riveted to the flange at the bottom opening of the plenum box. This waveguide vent blocks the direct path of radiation through a single-bend or double-bend channel and attenuates electromagnetic waves using a cutoff waveguide. Aluminum foil is placed between the plenum box bottom plate and the copper plate shielding layer and secured by copper and wood screws along the edge of the bottom plate to form a continuous shielding connection. Combined with a ventilation hole panel installed at the bottom of the plenum box, it achieves integrated radiation protection and electromagnetic shielding while maintaining ventilation volume, improving installation and maintenance efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning and ventilation technology, and in particular to a high-performance waveguide ventilation outlet that integrates radiation protection and electromagnetic shielding. Background Technology

[0002] Radiological diagnostic and treatment rooms in hospitals, such as CT scan rooms, deep treatment X-ray rooms, MRI rooms, linear accelerator rooms, cobalt-60 treatment rooms, and nuclear medicine rooms, require independent air conditioning and ventilation systems. Different medical devices produce different types of radiation, electromagnetic interference frequencies, and radiation energies. When the ventilation openings pass through the shielding walls, they must not form electromagnetic leakage channels, nor direct channels for X-rays, gamma rays, or neutron radiation. At the same time, they must also meet the requirements for air exchange rate, noise, and air resistance in the room.

[0003] In existing radiology diagnostic rooms, radiation protection lead louvers and electromagnetic shielding waveguide ventilation windows are typically installed in series along the air supply and exhaust direction. Straight-hole waveguides mainly utilize the principle of cutoff waveguides to attenuate electromagnetic waves, but they are difficult to block ionizing radiation propagating along the channel. Although lead louvers can attenuate some radiation, the gaps between the louvers and the connection points of the components can easily form direct leakage paths. When the two components are connected in series, local resistance will also be superimposed, resulting in insufficient shielding continuity, large installation space occupation, and complex maintenance and disassembly at the junction of flanges, ceilings, and shielding walls.

[0004] To address the aforementioned issues, a search revealed a patent with publication number CN207080140U that discloses an electromagnetic shielded waveguide ventilation window and an electromagnetic shielded door. The patent proposes "using multiple layers stacked to form an outer edge frame and a central honeycomb structure," forming a structurally stable honeycomb waveguide ventilation window through the load-bearing parts of the layers and the honeycomb parts. While this solution can improve the structural strength and high-temperature resistance of the honeycomb waveguide ventilation window, it primarily focuses on electromagnetic shielding and the stability of the honeycomb structure. It does not provide a high-density composite protective layer for X-rays, gamma rays, and neutron radiation, nor does it cut off the direct path of radiation through a single-bend or double-bend labyrinth channel. Therefore, it is difficult to directly meet the comprehensive requirements of medical radiology rooms for simultaneous radiation protection, electromagnetic shielding, and low-resistance ventilation.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Summary of the Invention

[0006] The purpose of this invention is to provide a high-performance integrated waveguide ventilation opening for radiation protection and electromagnetic shielding, in order to solve the problems mentioned in the background art. In existing radiology diagnostic rooms, radiation protection lead louvers and electromagnetic shielding waveguide ventilation windows are usually installed in series along the air supply and exhaust direction. Straight-hole waveguides mainly use the principle of cutoff waveguides to attenuate electromagnetic waves, but they are difficult to block ionizing radiation propagating along the channel. Although lead louvers can attenuate some radiation, the gaps between the louvers and the connection of the components can easily form direct leakage paths. When the two components are connected in series, local resistance will also be superimposed, and problems such as insufficient shielding continuity, large installation space occupation, and complicated maintenance and disassembly will occur at the junction of flanges, ceilings and shielding walls.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-performance radiation protection and electromagnetic shielding integrated waveguide ventilation opening, including a stainless steel plate silencing static pressure box. The stainless steel plate silencing static pressure box is connected to a right-angle elbow of a duct at the top. The right-angle elbow of the duct is connected to an electric airtight butterfly valve through an insulated flexible duct. The side of the electric airtight butterfly valve away from the insulated flexible duct is connected to a supply and exhaust duct. A flange is set around the lower part of the stainless steel plate silencing static pressure box. A double-bend waveguide or a single-bend waveguide is installed on the inner bottom of the stainless steel plate silencing static pressure box. The walls of the double-bend waveguide and the single-bend waveguide are provided with an electromagnetic shielding layer and a radiation protection layer. The waveguide channel forms at least one bend that deviates from the straight direction of the airflow. The detachable ceiling vent panel is riveted to the flange at the bottom opening of the static pressure box and can be detachably installed at the ventilation opening of the aluminum alloy ceiling.

[0008] Preferably, the insulated flexible air duct is disposed between the right-angle elbow of the air duct and the electric airtight butterfly valve, and the connection between the right-angle elbow of the air duct and the stainless steel plate silencer static pressure box is locked with a special clamp, and the outer side of the supply and exhaust air duct is covered with an external insulation layer.

[0009] Preferably, an aluminum foil is provided between the bottom plate of the stainless steel plate silencing static pressure box and the copper plate shielding layer. The aluminum foil is 0.3mm thick. Multiple copper wood screws are spaced along the edge of the bottom plate and press the bottom plate, aluminum foil and copper plate shielding layer together.

[0010] Preferably, the flange is located above the decorative keel of the aluminum alloy suspended ceiling, and the detachable ceiling vent panel is riveted to the flange at the bottom opening of the static pressure box, and can be detachably installed at the ventilation opening of the aluminum alloy suspended ceiling to form a disassembly and assembly channel for inspecting and repairing double-bend waveguides or single-bend waveguides.

[0011] Preferably, the bottom of the stainless steel plate silencing static pressure box is equipped with a ventilation hole plate panel, and the ventilation hole plate panel is provided with an array of multiple honeycomb waveguide holes, each of which has a regular hexagonal cross-section.

[0012] Preferably, the bore walls of both the double-bend waveguide and the single-bend waveguide are composite layer structures. The composite layer structure used in low- and medium-energy radiation scenarios includes a lead alloy layer, an oxygen-free copper layer, and a stainless steel reinforcement layer. The composite layer structure used in high-energy radiation and neutron scenarios includes a boron-containing polyethylene layer, a lead alloy layer or a tungsten alloy layer, and a highly conductive stainless steel layer.

[0013] Preferably, the double-bend waveguide has two staggered 90° bends to form an S-shaped labyrinthine channel, so that rays entering from the detachable ceiling vent panel collide with the composite layer structure at least twice before entering the stainless steel plate sound-absorbing static pressure box.

[0014] Preferably, the single-bend waveguide is provided with a 90° bend section to form an L-shaped labyrinthine channel.

[0015] Preferably, an inverted T-shaped seal is provided at the joint between the detachable ceiling vent panel and the aluminum alloy ceiling. The electromagnetic shielding contact surface of the inverted T-shaped seal is provided with a beryllium copper spring and a conductive rubber gasket. When radiation protection is required, a pure lead sealing gasket is provided on the radiation protection contact surface of the inverted T-shaped seal. A continuous conductive path is formed between the copper plate shielding layer and the stainless steel plate silencing static pressure box. When the valve plate of the electric airtight butterfly valve is closed, it seals the ventilation path of the supply and exhaust ducts.

[0016] Preferably, the valve plate of the electric sealed butterfly valve is provided with a stainless steel protective layer, an oxygen-free copper electromagnetic shielding layer and a lead alloy radiation protection layer, and a conductive sealing strip is provided on the outer periphery of the valve plate. When the valve plate is rotated to the closed position, the conductive sealing strip is pressed into contact with the inner wall of the valve body of the electric sealed butterfly valve.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This high-performance integrated waveguide ventilation outlet for radiation protection and electromagnetic shielding utilizes a stainless steel silencing plenum box, flanges, inverted T-shaped seals, a copper shielding layer, bent waveguides, and composite hole walls to form a continuous protective shielding channel. Double-bent or single-bent waveguides deviate the ventilation path from the straight-line propagation direction of radiation. X-rays and gamma rays collide with and are attenuated by the lead alloy or tungsten alloy layer within the channel. In high-energy scenarios, a boron-containing polyethylene layer slows down and absorbs neutrons. An oxygen-free copper layer, a highly conductive stainless steel layer, and honeycomb waveguide holes utilize the cutoff waveguide principle to attenuate electromagnetic waves in the target frequency band. The stainless steel silencing plenum box base plate, aluminum foil, and copper shielding layer are secured by copper and wood screws along the edge of the base plate to maintain continuous conductivity. A ring of flanges around the lower part of the stainless steel silencing plenum box is used for installation and fixation, thus avoiding the protective discontinuity formed at the connection point when traditional lead louvers are connected in series with electromagnetic shielding waveguide windows, achieving integration of radiation protection, electromagnetic shielding, and air conditioning ventilation.

[0018] 2. This high-performance integrated radiation protection and electromagnetic shielding waveguide vent can be selected from double-bend waveguides, single-bend waveguides, and ventilation perforation panels according to the type of computer room. A maintenance channel is formed through the detachable ceiling vent panel, allowing for inspection or replacement of waveguide components without removing the aluminum alloy ceiling and main supply and exhaust ducts. The insulated flexible duct reduces the transmission of vibration from the supply and exhaust ducts to the shielding structure. Special clamps facilitate quick and easy locking of the right-angle bends in the ducts to the stainless steel silencer plenum box. The external insulation layer of the duct reduces the risk of condensation. The electrically operated airtight butterfly valve can adjust or close the airflow according to building automation or fire alarm commands. While meeting protection and shielding requirements, it reduces installation space occupation, post-maintenance difficulty, and additional system air resistance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation structure of the double-bent waveguide ventilation opening of the present invention; Figure 2 This is a schematic diagram of the installation structure of the single-bend waveguide ventilation opening of the present invention; Figure 3 This is a schematic diagram of the structure of the ventilation perforated plate panel of the present invention.

[0020] In the diagram: 1. Stainless steel plate silencer plenum box; 2. Right-angle elbow of air duct; 3. Insulated flexible air duct; 4. Electric airtight butterfly valve; 5. Supply and exhaust air duct; 6. External insulation layer of air duct; 7. Flange; 8. Special clamp; 9. Copper plate shielding layer; 10. Aluminum foil; 11. Copper wood screws; 12. Double-bend waveguide; 13. Single-bend waveguide; 14. Removable ceiling vent panel; 15. Aluminum alloy ceiling; 16. Ventilation perforated panel; 17. Honeycomb waveguide hole; 18. Inverted T-shaped seal. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-3 This invention provides a technical solution: a high-performance radiation protection and electromagnetic shielding integrated waveguide ventilation outlet, comprising a stainless steel plate silencing static pressure box 1. A right-angle elbow 2 of a duct is connected to the top of the stainless steel plate silencing static pressure box 1. The right-angle elbow 2 of the duct is connected to an electric airtight butterfly valve 4 through an insulated flexible duct 3. An exhaust duct 5 is connected to the side of the electric airtight butterfly valve 4 away from the insulated flexible duct 3. A flange 7 is set around the lower part of the stainless steel plate silencing static pressure box 1. A double-bend waveguide 12 or a single-bend waveguide 13 is installed on the inner bottom of the stainless steel plate silencing static pressure box 1. The walls of the double-bend waveguide 12 and the single-bend waveguide 13 are provided with an electromagnetic shielding layer and a radiation protection layer. The waveguide channel forms at least one bend that deviates from the straight direction of the airflow. The detachable ceiling vent panel 14 is riveted to the flange at the bottom opening of the static pressure box and can be detachably installed at the ventilation opening of the aluminum alloy ceiling 15.

[0023] Furthermore, the insulated flexible air duct 3 is disposed between the right-angle elbow 2 and the electric airtight butterfly valve 4. The connection between the right-angle elbow 2 and the stainless steel plate silencer static pressure box 1 is locked by a special clamp 8. The outer side of the supply and exhaust air duct 5 is covered with an external insulation layer 6. The special clamp 8 ensures that the connection between the right-angle elbow 2 and the stainless steel plate silencer static pressure box 1 remains stable. The insulated flexible air duct 3 can isolate the mechanical vibration transmitted by the fan or the supply and exhaust air duct 5, and reduce the loosening of the connection between the stainless steel plate silencer static pressure box 1 and the copper plate shielding layer 9 due to long-term vibration. The external insulation layer 6 can reduce the condensation on the outer surface of the supply and exhaust air duct 5 during the cold and hot air transportation process.

[0024] Furthermore, the aluminum foil 10 is lining the bottom plate of the stainless steel plate silencing static pressure box 1 and the copper plate shielding layer 9, with a thickness of 0.3mm. Multiple copper wood screws 11 are spaced along the edge of the bottom plate and press the bottom plate, aluminum foil 10 and copper plate shielding layer 9 together. By filling the gaps with aluminum foil 10 and pressing it at multiple points with copper wood screws 11, the electromagnetic shielding continuity between the bottom plate and the copper plate shielding layer 9 can be improved.

[0025] Furthermore, flange 7 is located above the decorative keel of aluminum alloy ceiling 15, and the detachable ceiling vent panel 14 is riveted to the flange at the bottom opening of the static pressure box, and can be detachably installed at the ventilation opening of aluminum alloy ceiling 15 to form a disassembly and assembly channel for inspecting and repairing double-bend waveguide 12 or single-bend waveguide 13.

[0026] Furthermore, a ventilation perforated panel 16 is installed at the bottom of the static pressure chamber. Multiple honeycomb waveguide holes 17 are arranged in an array on the ventilation perforated panel 16. The cross-section of each honeycomb waveguide hole 17 is a regular hexagon. The multiple honeycomb waveguide holes 17 form parallel ventilation channels, which can cut off and attenuate electromagnetic waves while maintaining an effective opening ratio.

[0027] Furthermore, the bore walls of the double-bend waveguide 12 and the single-bend waveguide 13 are both composite layer structures. When used in CT, DR, or MRI rooms, the composite layer structure is formed by sequentially combining a stainless steel protective layer, an oxygen-free copper layer, a lead alloy layer, and another stainless steel protective layer. The lead alloy layer is used to attenuate X-rays and gamma rays, the oxygen-free copper layer is used to form a highly conductive electromagnetic shielding inner wall, and the stainless steel protective layer is used to completely cover the lead alloy layer and improve the structural strength.

[0028] Furthermore, when used in linear accelerators, cobalt-60 treatment chambers, or neutron treatment chambers, the composite layer structure is formed by combining a boron-containing polyethylene layer, a lead alloy layer or a tungsten alloy layer, and a highly conductive stainless steel layer. The boron-containing polyethylene layer is used to slow down and absorb neutrons, the lead alloy layer or tungsten alloy layer is used to attenuate high-energy gamma rays and X-rays, and the highly conductive stainless steel layer is used for electromagnetic shielding and structural support.

[0029] Furthermore, the double-bend waveguide 12 is provided with two staggered 90° bends to form an S-shaped labyrinth channel. Rays entering the double-bend waveguide 12 need to hit the hole wall composite layer at least twice before they can pass through, which is suitable for high-energy ray scenarios. The single-bend waveguide 13 is provided with one 90° bend to form an L-shaped labyrinth channel. Rays entering the single-bend waveguide 13 need to hit the hole wall composite layer at least once before they can pass through, which is suitable for medium and low-energy ray scenarios.

[0030] Furthermore, the inverted T-shaped seal 18 is disposed at the joint between the detachable ceiling vent panel 14 and the aluminum alloy ceiling 15. The electromagnetic shielding bonding surface of the inverted T-shaped seal 18 is provided with a beryllium copper spring and a conductive rubber gasket. The beryllium copper spring is snapped into the conductive groove of the inverted T-shaped seal 18, and the conductive rubber gasket is bonded to the sealing groove of the inverted T-shaped seal 18. When radiation protection is required, the radiation protection bonding surface of the inverted T-shaped seal 18 is provided with a pure lead sealing gasket. The pure lead sealing gasket is pressed by the inverted T-shaped seal 18 at the joint between the detachable ceiling vent panel 14 and the aluminum alloy ceiling 15 to ensure continuous connection of the protective layer at the joint.

[0031] Furthermore, the valve plate of the electric airtight butterfly valve 4 is provided with a stainless steel protective layer, an oxygen-free copper electromagnetic shielding layer, and a lead alloy radiation protection layer. A conductive sealing strip is provided on the outer periphery of the valve plate. When the valve plate is rotated to the closed position, the conductive sealing strip is pressed into contact with the inner wall of the valve body of the electric airtight butterfly valve 4. Through the combination of the valve plate and the conductive sealing strip, the electric airtight butterfly valve 4 maintains the continuity of electromagnetic shielding and radiation protection when closing the ventilation path.

[0032] Furthermore, the valve plate of the electric airtight butterfly valve 4 can be adjusted within the range of 0° to 90° and is connected to the building automation system or fire linkage system. During normal ventilation, the opening degree is adjusted according to the air exchange requirements of the machine room. When ventilation is stopped or a linkage shutdown command is issued, the ventilation path of the supply and exhaust air duct 5 is closed. The stainless steel plate silencer static pressure box 1 and the copper plate shielding layer 9 are both connected to the shielding grounding system. The inverted T-shaped seal 18 maintains the conductive continuity between the detachable ceiling air vent panel 14 and the aluminum alloy ceiling 15 through its beryllium copper spring and conductive rubber gasket, so as to avoid the generation of a floating potential difference on both sides of the joint between the two.

[0033] Example 1: This embodiment is used in a CT scan room and employs... Figure 2 The single-bend waveguide vent shown has an overall installation opening of 300mm×300mm. The stainless steel plate silencing static pressure box 1 is formed by bending and welding 304 stainless steel plate with a thickness of 2mm. The flange 7 has a width of 50mm. The bottom plate edge of the stainless steel plate silencing static pressure box 1 and the corresponding copper plate shielding layer 9 are provided with mounting holes for copper wood screws 11 to pass through. The mounting hole spacing is 100mm. The channel of the single-bend waveguide 13 is provided with a 90° bend section to form an L-shaped labyrinth channel with an effective channel length of 25mm.

[0034] The composite layer of the bore wall of the single-bend waveguide 13 consists of a 0.5mm thick stainless steel protective layer, a 0.3mm thick oxygen-free copper layer, a 2.0mm thick lead alloy layer, and a 0.5mm thick stainless steel protective layer from the outside to the inside. The total thickness of the composite layer is 3.3mm, which is equivalent to 2.5mmPb. The oxygen-free copper layer and the lead alloy layer are cold-rolled and reinforced by local brazing at the irregular flange position. The lead alloy layer completely covers the stainless steel protective layers on both sides.

[0035] During installation, a copper plate shielding layer 9 is laid around the ventilation openings of the CT room's shielding wall. A 0.3mm thick aluminum foil 10 is placed between the bottom plate of the stainless steel silencing static pressure box 1 and the copper plate shielding layer 9. The bottom plate, aluminum foil 10, and copper plate shielding layer 9 are pressed together using copper wood screws 11 spaced along the edge of the bottom plate. The ventilation hole panel 16 is installed at the bottom of the stainless steel silencing static pressure box 1. The honeycomb waveguide hole 17 has a width of 3.2mm across sides. An inverted T-shaped seal 18 is provided at the... The joint between the ceiling vent panel 14 and the aluminum alloy ceiling 15 is disassembled, and its electromagnetic shielding bonding surface is provided with beryllium copper springs and conductive rubber gaskets; when radiation protection is required, its radiation protection bonding surface is provided with a 2mm thick pure lead sealing gasket. In this embodiment, the wind resistance at a wind speed of 2m / s is not greater than 22Pa, the electromagnetic shielding effectiveness in the frequency range of 1MHz to 100MHz is not less than 65dB, and the radiation leakage rate detected at 30cm from the outer surface of the shield is not greater than 0.1μSv / h.

[0036] Example 2: This embodiment is used in a medical linear accelerator room, employing... Figure 1 The double-bend waveguide vent shown has an overall installation opening of 600mm×600mm. The stainless steel plate silencing static pressure box 1 has a depth of 150mm. The double-bend waveguide 12 is provided with two staggered 90° bends, each bend being 50mm long. The two bends are connected by a straight section to form an S-shaped labyrinthine channel.

[0037] The composite layer of the hole wall of the double-bent waveguide 12 consists of a 10mm thick boron-containing polyethylene layer, a 6.0mm thick lead alloy layer, and a 1.0mm thick high-conductivity stainless steel layer along the incident direction of the radiation. The boron mass fraction in the boron-containing polyethylene layer is 10%. The boron-containing polyethylene layer and the lead alloy layer are connected by a pre-embedded integrated molding method. The segmented flange positions are bonded with radiation-resistant epoxy adhesive and mechanically locked with countersunk bolts.

[0038] During installation, the stainless steel plate silencing static pressure box 1 is embedded into the ventilation opening of the shielding wall of the linear accelerator room, so that the bottom plate of the stainless steel plate silencing static pressure box 1 is positioned opposite the copper plate shielding layer 9. After lining the two with aluminum foil paper 10, they are connected by pressing with copper wood screws 11. Then, the right-angle elbow 2 of the air duct, the insulated flexible air duct 3, the electric airtight butterfly valve 4 and the supply and exhaust air duct 5 are connected in sequence. The connection between the right-angle elbow 2 of the air duct and the stainless steel plate silencing static pressure box 1 is locked with a special clamp 8. The outer side of the supply and exhaust air duct 5 is provided with an external heat insulation layer 6. In this embodiment, the wind resistance at a wind speed of 2m / s is not greater than 38Pa, the electromagnetic shielding effectiveness in the frequency range of 1MHz to 1GHz is not less than 85dB, and the neutron attenuation rate is not less than 99%.

[0039] Working principle: In initial use, under supply air conditions, air enters through the supply and exhaust ducts 5, sequentially passing through the electric sealed butterfly valve 4, the insulated flexible duct 3, and the right-angle elbow 2 before entering the stainless steel plate silencer plenum 1. After silencing and pressure stabilization, it enters the double-bend waveguide 12 or the single-bend waveguide 13, and can be diverted through multiple honeycomb-shaped waveguide holes 17 on the ventilation panel 16. Finally, it enters the machine room through the detachable ceiling vent panel 14. Under exhaust air conditions, the airflow reverses along the above path, and electromagnetic waves enter the double... After the bend waveguide 12, single bend waveguide 13, or honeycomb waveguide hole 17 is formed, the cross-sectional dimensions and effective length of the channel meet the cutoff waveguide condition and continue to attenuate along the propagation direction. X-rays and gamma rays cannot pass through in a straight line after entering the bend channel, and are absorbed and attenuated by the lead alloy layer or tungsten alloy layer during one or two impacts on the composite layer of the hole wall. Neutrons in the high-energy scene are slowed down and absorbed by the boron-containing polyethylene layer. Copper wood screws 11 are set along the edge of the bottom plate of the stainless steel plate silencing static pressure box 1 to secure the bottom plate. Aluminum foil 10 and copper plate shielding layer 9 are pressed together to maintain electrical continuity. Flange 7 is installed around the lower part of the stainless steel plate silencing static pressure box 1 for installation and fixation. Inverted T-shaped seal 18 is installed at the joint between the removable ceiling vent panel 14 and the aluminum alloy ceiling 15. Its beryllium copper spring and conductive rubber gasket maintain electromagnetic shielding continuity. When radiation protection is required, the joint is sealed with a pure lead gasket. Special clamp 8 locks the connection between the right-angle elbow 2 of the air duct and the stainless steel plate silencing static pressure box 1. The insulated flexible duct 3 isolates the pipeline vibration, and the external insulation layer 6 of the duct reduces condensation. When the machine room stops ventilation or receives a fire linkage shutdown command, the electric airtight butterfly valve 4 closes the supply and exhaust air ducts 5 and presses the conductive sealing strip on the outer periphery of the valve plate into tight contact with the inner wall of the valve body to seal the ventilation path and maintain shielding continuity. When maintenance is required, the inverted T-shaped seal 18 is removed and the rivets between the detachable ceiling air outlet panel 14 and the flange at the bottom opening of the static pressure box are removed, so that the internal waveguide components can be inspected or replaced from the machine room side.

[0040] 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 of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-performance radiation protection and electromagnetic shielding integrated waveguide ventilation outlet, including a stainless steel plate silencing static pressure box (1), characterized in that: The stainless steel plate silencing static pressure box (1) is connected to a right-angle elbow (2) of the air duct. The right-angle elbow (2) of the air duct is connected to an electric airtight butterfly valve (4) through an insulated flexible air duct (3). The electric airtight butterfly valve (4) is connected to a supply and exhaust air duct (5) on the side away from the insulated flexible air duct (3). A flange (7) is set around the lower part of the stainless steel plate silencing static pressure box (1). A double-bend waveguide (12) or a single-bend waveguide (13) is installed on the inner side of the bottom of the stainless steel plate silencing static pressure box (1). The walls of the double-bend waveguide (12) and the single-bend waveguide (13) are provided with an electromagnetic shielding layer and a radiation protection layer. The waveguide channel forms at least one bend that deviates from the straight direction of the airflow. The detachable ceiling vent panel (14) is riveted to the flange at the bottom opening of the static pressure box and can be detachably installed at the ventilation opening of the aluminum alloy ceiling (15).

2. The high performance radiation shielding, electromagnetic shielding integrated waveguide vent of claim 1, wherein: The insulated flexible air duct (3) is located between the right-angle elbow (2) and the electric sealed butterfly valve (4). The connection between the right-angle elbow (2) and the stainless steel plate silencer static pressure box (1) is locked by a special clamp (8). The outside of the supply and exhaust air duct (5) is covered with an external insulation layer (6).

3. The high performance radiation shielding, electromagnetic shielding integrated waveguide vent of claim 1, wherein: An aluminum foil (10) is provided between the bottom plate of the stainless steel plate silencing static pressure box (1) and the copper plate shielding layer (9). The aluminum foil (10) is 0.3 mm thick. Multiple copper wood screws (11) are spaced along the edge of the bottom plate and press the bottom plate, aluminum foil (10) and copper plate shielding layer (9) together.

4. The high performance radiation shielding, electromagnetic shielding integrated waveguide vent of claim 1, wherein: The flange (7) is located above the decorative keel of the aluminum alloy ceiling (15). The detachable ceiling vent panel (14) is riveted to the flange at the bottom opening of the static pressure box and can be detachably installed at the ventilation opening of the aluminum alloy ceiling (15) to form a disassembly and assembly channel for inspecting the double-bend waveguide (12) or the single-bend waveguide (13).

5. The high performance radiation shielding, electromagnetic shielding integrated waveguide vent of claim 1, wherein: The bottom of the stainless steel plate silencer static pressure box (1) is equipped with a ventilation hole plate panel (16), and multiple honeycomb waveguide holes (17) are arranged in an array on the ventilation hole plate panel (16), and the cross section of each honeycomb waveguide hole (17) is a regular hexagon.

6. The high performance radiation shielding, electromagnetic shielding integrated waveguide vent of claim 1, wherein: The holes of the double-bend waveguide (12) and the single-bend waveguide (13) are both composite layer structures. The composite layer structure in the low-energy radiation application scenario includes a lead alloy layer, an oxygen-free copper layer and a stainless steel reinforcement layer. The composite layer structure in the high-energy radiation and neutron application scenario includes a boron-containing polyethylene layer, a lead alloy layer or a tungsten alloy layer and a highly conductive stainless steel layer.

7. The high-performance radiation protection and electromagnetic shielding integrated waveguide ventilation port according to claim 6, characterized in that: The double-bend waveguide (12) is provided with two staggered 90° bends to form an S-shaped labyrinth channel, so that the rays entering from the detachable ceiling vent panel (14) can collide with the composite layer structure at least twice before entering the stainless steel plate sound-absorbing static pressure box (1).

8. The high-performance radiation protection and electromagnetic shielding integrated waveguide ventilation port according to claim 6, characterized in that: The single-bend waveguide (13) is provided with a 90° bend to form an L-shaped labyrinth channel.

9. The high-performance radiation protection and electromagnetic shielding integrated waveguide ventilation port according to claim 3, characterized in that: An inverted T-shaped seal (18) is provided at the joint between the detachable ceiling vent panel (14) and the aluminum alloy ceiling (15). The electromagnetic shielding bonding surface of the inverted T-shaped seal (18) is provided with a beryllium copper spring and a conductive rubber gasket. When radiation protection is required, the radiation protection bonding surface of the inverted T-shaped seal (18) is provided with a pure lead sealing gasket. A conductive continuous path is formed between the copper plate shielding layer (9) and the stainless steel plate silencing static pressure box (1). When the valve plate of the electric sealing butterfly valve (4) is closed, the ventilation path of the supply and exhaust pipe (5) is sealed.

10. The high-performance radiation protection and electromagnetic shielding integrated waveguide ventilation port according to claim 1, characterized in that: The valve plate of the electric sealed butterfly valve (4) is provided with a stainless steel protective layer, an oxygen-free copper electromagnetic shielding layer and a lead alloy radiation protection layer. A conductive sealing strip is provided on the outer periphery of the valve plate. When the valve plate is rotated to the closed position, the conductive sealing strip is pressed against the inner wall of the valve body of the electric sealed butterfly valve (4).

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