Radiation environment monitoring aerosol sampling device

Abstract

The utility model discloses a kind of radiation environment monitoring aerosol sampling devices, including air inlet pipe, lifting mechanism, shunt pipe, fixing frame, sampling mechanism, air outlet pipe, box;Air inlet pipe is set to device whole just above, air inlet pipe is simultaneously connected with lifting mechanism, air inlet pipe lower part is equipped with shunt pipe, shunt pipe lower part connects sampling mechanism, sampling mechanism lower part connects air outlet pipe, first, device whole is erected around nuclear power plant or nuclear facility, by air inlet pipe, external gas enters device, according to the data of wind direction sensor, adjust air inlet pipe swing angle, by lifting mechanism control air inlet pipe height, increase air inlet efficiency, by sampling mechanism, gas condition is monitored in real time and carries out aerosol sampling, cooperate with the comprehensive data of wind speed sensor, realize the monitoring of aerosol in radiation environment gas, by the access hole of box outer wall, realize to replace maintenance to the damaged component inside device, and the replacement maintenance of sampling tube and aerosol filter membrane.

Description

Technical Field

[0001] This utility model belongs to the field of gas monitoring technology, and specifically relates to a radiation environment monitoring aerosol sampling device. Background Technology

[0002] Nuclear power generation and nuclear technology are increasingly widely used in medical, industrial, and scientific research fields. During normal operation, nuclear facilities may release trace amounts of radioactive materials in the air. Many of these radionuclides exist in the form of aerosols and can be transported over long distances with atmospheric circulation. Radioactive aerosols cannot be detected by human senses, but their inhalation and internal radiation pose a potentially significant risk to human health. Therefore, continuous and sensitive monitoring of radioactive aerosols in the environment has become a rigid requirement for radiation protection and public safety. However, the fixed sampling used by traditional monitoring devices has limitations: small sampling volume, low detection sensitivity, reliance on manual operation, inability to achieve continuous monitoring, and severely delayed measurement results.

[0003] A search revealed a gas-collecting jet aerosol sampling device with the prior art authorization publication number CN117147239A, which includes a support bracket, a high-pressure sealed container on the top of the support bracket, and two gas sealing valves communicating with the inside of the high-pressure sealed container on the side wall. This device uses shock waves to carry aerosols into the sampler and collects them by high-pressure water flow carrying aerosol particles. However, collecting aerosol particles by high-pressure water flow will affect the final detection results.

[0004] A search revealed a radioactive aerosol concentration detection device with prior art authorization publication number CN117538224A, comprising a monitoring chamber, an adsorption mechanism, and a detection mechanism. This device enables the calculation of radioactive aerosol content data in the same area of ​​the aerosol filter membrane by measuring the airflow and sample volume. External air can enter the inner side of the monitoring chamber through the air inlet, but the air inlet has a fixed and single opening direction, which limits the sampling gas and makes it difficult to guarantee the air intake, thus causing deviations in the monitoring data. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a radiation environment monitoring aerosol sampling device. First, the entire device is erected around a nuclear power plant or nuclear facility. External gas enters the device through an air inlet pipe. The swing angle of the air inlet pipe is adjusted based on data from a wind direction sensor. The height of the air inlet pipe is controlled by a lifting mechanism to increase air intake efficiency. The sampling mechanism monitors the gas conditions in real time and samples aerosols. Combined with comprehensive data from a wind speed sensor, the device monitors aerosols in the radiation environment. An inspection port on the outer wall of the enclosure allows for the replacement and repair of damaged internal components, as well as the replacement and maintenance of the sampling tube and aerosol filter membrane.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A radiation environment monitoring aerosol sampling device includes an inlet pipe, a lifting mechanism, a diverter pipe, a mounting frame, a sampling mechanism, an outlet pipe, a housing, a wind direction sensor, a wind speed sensor, a display screen, an inspection port, and a support. The inlet pipe is located at the top of the entire device and is connected to the lifting mechanism. A diverter pipe is located at the bottom of the inlet pipe, and the lower part of the diverter pipe is connected to the sampling mechanism. The sampling mechanism is mounted on the mounting frame, which is fixed inside the housing. The lower part of the sampling mechanism is connected to the outlet pipe. The wind direction sensor and wind speed sensor are both located on the upper part of the housing. A display screen is located at the front of the housing, and multiple sensors are located on the housing. The device features an inspection port and a fixed support at the bottom of the enclosure. The entire unit is initially erected around a nuclear power plant or facility. External gas enters the unit through an intake pipe. The intake pipe's swing angle is adjusted based on data from a wind direction sensor, and its height is controlled by a lifting mechanism to increase intake efficiency. A sampling mechanism monitors the gas conditions in real time and samples aerosols. Combined with comprehensive data from a wind speed sensor, the device monitors aerosols in the radiant environment. The inspection port on the outer wall of the enclosure allows for the replacement and repair of damaged internal components, as well as the replacement and maintenance of the sampling pipe and aerosol filter membrane.

[0008] The air intake pipe includes a filter plate, a gas collection hood, a rubber hose, a telescopic tube, a protective cover, an electric actuator, rack I, gear I, gear II, a swing rod, a clamping ring, and a slide groove I. The filter plate is located on the upper part of the gas collection hood, and a rubber hose is located on the lower part of the gas collection hood. A telescopic tube is located on the lower part of the rubber hose. The electric actuator is fixed to the outer wall of the telescopic tube. A rack I is located at the top end of the electric actuator. The rack I is also located in the slide groove I, which is fixed to the front end of the telescopic tube. The rack I meshes with gear I, gear I meshes with gear II, and gear II is fixed to the swing rod. The device is connected to a swing rod with a clamping ring at the front end. The clamping ring clamps the gas collection hood, which is fixed to the telescopic pipe. The protective hood has a telescopic cover plate. All transmission mechanisms on the air inlet pipe are located inside the protective hood. The electric push rod pushes rack I, rack I meshes with gear I, gear I meshes with gear II, gear II drives the swing rod to rotate, the swing rod drives the clamping ring to rotate, and the clamping ring drives the gas collection hood to rotate. The orientation of the gas collection hood changes according to the wind direction. Large particulate impurities in the air are filtered through the filter plate, and the gas enters the device through the air inlet pipe.

[0009] The lifting mechanism includes a support platform, a positioning plate I, a motor I, a gear III, a gear IV, a threaded sleeve, a lead screw, a positioning plate II, and a telescopic protective cover. The support platform is fixed inside the housing, and the positioning plate I is mounted on the support platform. The motor I is located inside the support platform, and the output end of the motor I has a gear III that meshes with gear IV. A threaded sleeve is located in the middle of gear IV and is fixedly connected to gear IV. The threaded sleeve is rotatably connected to the positioning plate I, and the inner ring of the threaded sleeve has a thread that engages with the lead screw. The upper part of the lead screw passes through the positioning plate I and connects to the positioning plate II. The positioning plate II is fixed to the upper part of the telescopic tube, and the lower part of the lead screw is located in a circular hole on the support platform without contacting the support platform. A telescopic protective cover is located outside the lead screw and is positioned between the positioning plate II and the positioning plate I. The motor I controls the rotation of gear III, which meshes with gear IV. Gear IV drives the threaded sleeve to rotate, and the rotation of the threaded sleeve causes the lead screw to extend or retract. The lead screw then drives the telescopic tube to rise or fall through the positioning plate II, adjusting the height of the air intake pipe and improving the air intake efficiency.

[0010] The sampling mechanism includes an angle stepper motor, a drive shaft, a rotating plate, sampling tubes, and a real-time monitoring detector. The angle stepper motor is mounted on a fixed frame, and the output end of the angle stepper motor is equipped with a drive shaft. Two sets of rotating plates are symmetrically fixed to the upper and lower ends of the drive shaft. Each rotating plate has four sets of circular holes, and four sets of sampling tubes are positioned between the two sets of rotating plates. One set of sampling tubes has its upper end attached to the diverter pipe and its lower end attached to the outlet pipe. The real-time monitoring detector is located at the lower end of the diverter pipe and uses a BC-type sensor. A plastic scintillator detector is used to measure beta activity or gamma rays, enabling preliminary nuclide identification, followed by conversion into an electrical signal by a photodiode. The sampling tube includes a tube body and an aerosol filter membrane. The tube body is composed of two parts joined together, with the aerosol filter membrane located inside the tube body. An angle stepper motor drives a drive shaft to rotate, which in turn drives a rotating plate to rotate, which in turn drives the sampling tube to rotate. This allows for switching between sampling tubes after sampling. A real-time monitoring detector located in the shunt tube monitors the passing gas in real time. By monitoring the gas conditions in real time and sampling aerosols, combined with comprehensive data from a wind speed sensor, the monitoring of aerosols in the radiation environment gas is achieved. The advantages of this invention compared to existing technologies are as follows:

[0011] 1) Adjust the swing angle of the air intake pipe based on the data from the wind direction sensor and the wind speed sensor, and control the height of the air intake pipe through the lifting mechanism to actively match the gas diffusion conditions, overcome the limitations of traditional fixed sampling, maximize the air intake per unit time, and thus improve sampling efficiency.

[0012] 2) The sampling mechanism monitors the passing gas in real time, collects radioactive aerosols through an aerosol filter membrane, and performs comprehensive analysis based on the data obtained from the real-time monitoring detector, combined with the comprehensive data from the wind speed sensor, to achieve the monitoring of aerosols in the radiation environment gas. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the structure of an aerosol sampling device for radiation environment monitoring according to this utility model. Figure 1 ;

[0014] Appendix Figure 2 This is a schematic diagram of the structure of a radiation environment monitoring aerosol sampling device according to the present invention. Figure 2 ;

[0015] Appendix Figure 3 This is a schematic diagram of the structure of an aerosol sampling device for radiation environment monitoring according to this utility model. Figure 3 ;

[0016] Appendix Figure 4 It is attached Figure 3 Schematic diagram of the central intake manifold;

[0017] Appendix Figure 5 It is attached Figure 3 Schematic diagram of the lifting mechanism;

[0018] Appendix Figure 6 It is attached Figure 3 Schematic diagram of the sampling mechanism Figure 1 ;

[0019] Appendix Figure 7 It is attached Figure 3 Schematic diagram of the sampling mechanism Figure 2 ;

[0020] Appendix Figure 8 It is attached Figure 7 Schematic diagram of the sampling tube structure;

[0021] In the diagram: 11. Inlet pipe; 12. Lifting mechanism; 13. Diverter pipe; 14. Fixing frame; 15. Sampling mechanism; 18. Outlet pipe; 19. Housing; 20. Wind direction sensor; 21. Wind speed sensor; 22. Display screen; 23. Inspection port; 24. Bracket;

[0022] 101. Filter plate; 102. Gas collection hood; 103. Rubber hose; 104. Telescopic tube; 105. Protective cover; 106. Electric actuator; 107. Rack I; 108. Gear I; 109. Gear II; 110. Swing rod; 111. Clamping ring; 112. Slide groove I;

[0023] 201. Support platform; 202. Positioning plate I; 203. Motor I; 204. Gear III; 205. Gear IV; 206. Screw sleeve; 207. Lead screw; 208. Positioning plate II; 209. Telescopic protective cover;

[0024] 301. Angle stepper motor; 302. Drive shaft; 303. Rotating plate; 304. Sampling tube; 305. Real-time monitoring detector;

[0025] 3041, tube body; 3042, aerosol filter membrane. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-8 The technical solution of this utility model will be further described in detail below.

[0027] A radiation environment monitoring aerosol sampling device includes an inlet pipe 11, a lifting mechanism 12, a diverter pipe 13, a fixing frame 14, a sampling mechanism 15, an outlet pipe 18, a housing 19, a wind direction sensor 20, a wind speed sensor 21, a display screen 22, an inspection port 23, and a bracket 24. The inlet pipe 11 is located directly above the entire device and is connected to the lifting mechanism 12. A diverter pipe 13 is located at the lower part of the inlet pipe 11, and the lower part of the diverter pipe 13 is connected to the sampling mechanism 15. The sampling mechanism 15 is mounted on the fixing frame 14, which is fixed inside the housing 19. The lower part of the sampling mechanism 15 is connected to the outlet pipe 18. The wind direction sensor 20 and the wind speed sensor 21 are both located on the upper part of the housing 19, and the front end of the housing 19 has a... The display screen 22 and the housing 19 are equipped with multiple inspection ports 23. A bracket 24 is fixed to the lower part of the housing 19. First, the entire device is erected around a nuclear power plant or nuclear facility. External gas is introduced into the device through the air intake pipe 11. The swing angle of the air intake pipe 11 is adjusted according to the data of the wind direction sensor 20. The height of the air intake pipe 11 is controlled by the lifting mechanism 12 to increase the air intake efficiency. The gas condition is monitored in real time and aerosol samples are taken through the sampling mechanism 15. With the comprehensive data of the wind speed sensor 21, the monitoring of aerosols in the radiation environment gas is realized. The inspection ports 23 set on the outer wall of the housing 19 are used to replace and repair damaged parts inside the device, as well as replace and maintain the sampling tube 304 and the aerosol filter membrane 3042.

[0028] The air intake pipe 11 includes a filter plate 101, a gas collection hood 102, a rubber hose 103, a telescopic pipe 104, a protective cover 105, an electric actuator 106, a rack I 107, a gear I 108, a gear II 109, a swing rod 110, a clamping ring 111, and a sliding groove I 112. The filter plate 101 is located on the upper part of the gas collection hood 102. The lower part of the gas collection hood 102 is provided with a rubber hose 103, and the lower part of the rubber hose 103 is provided with a telescopic pipe 104. The electric actuator 106 is fixed on the outer wall of the telescopic pipe 104. The protruding end of the electric actuator 106 is provided with a rack I 107, which is also located in the sliding groove I 112. The sliding groove I 112 is fixed to the front end of the telescopic pipe 104. The rack I 107 meshes with the gear I 108, and the gear I 108 meshes with the gear II 109. Wheel II 109 is fixedly connected to swing rod 110. Swing rod 110 has a clamping ring 111 at its front end. The clamping ring 111 clamps the gas collection hood 102. Protective cover 105 is fixed on telescopic pipe 104. Protective cover 105 has a telescopic cover plate. All transmission mechanisms on air inlet pipe 11 are located inside protective cover 105. Electric push rod 106 pushes rack I 107. Rack I 107 meshes with gear I 108. Gear I 108 meshes with gear II 109. Gear II 109 drives swing rod 110 to rotate. Swing rod 110 drives clamping ring 111 to rotate. Clamping ring 111 drives gas collection hood 102 to rotate. The orientation of gas collection hood 102 changes according to wind direction. Large particulate impurities in the air are filtered through filter plate 101. Gas enters the device through air inlet pipe 11.

[0029] The lifting mechanism 12 includes a support platform 201, a positioning plate I 202, a motor I 203, a gear III 204, a gear IV 205, a threaded sleeve 206, a lead screw 207, a positioning plate II 208, and a telescopic protective cover 209. The support platform 201 is fixed inside the housing 19. The positioning plate I 202 is provided on the support platform 201. The motor I 203 is located inside the support platform 201. The output end of the motor I 203 is provided with a gear III 204, which meshes with gear IV 205. A threaded sleeve 206 is provided in the middle of gear IV 205. The threaded sleeve 206 is fixedly connected to gear IV 205 and rotatably connected to the positioning plate I 202. The inner ring of the threaded sleeve 206 is threaded and connected to the lead screw 207. The upper part of the screw 207 passes through the positioning plate I 202 and connects to the positioning plate II 208. The positioning plate II 208 is fixed to the upper part of the telescopic tube 104. The lower part of the screw 207 is set in the round hole on the support platform 201 and does not contact the support platform 201. The screw 207 is provided with a telescopic protective cover 209. The telescopic protective cover 209 is also set between the positioning plate II 208 and the positioning plate I 202. The motor I 203 controls the gear III 204 to rotate. The gear III 204 meshes with the gear IV 205. The gear IV 205 drives the threaded sleeve 206 to rotate. The rotation of the threaded sleeve 206 drives the screw 207 to push out or retract. The screw 207 then drives the telescopic tube 104 to rise or fall through the positioning plate II 208, adjusting the height of the air intake pipe 11 and improving the air intake efficiency.

[0030] The sampling mechanism 15 includes an angle stepper motor 301, a drive shaft 302, a rotating plate 303, sampling tubes 304, and a real-time monitoring detector 305. The angle stepper motor 301 is mounted on a fixed frame 14, and the output end of the angle stepper motor 301 is provided with the drive shaft 302. Two sets of rotating plates 303 are symmetrically fixed at the upper and lower ends of the drive shaft 302. The rotating plates 303 have four sets of circular holes, and four sets of sampling tubes 304 are provided between the two sets of rotating plates 303. The upper end of one set of sampling tubes 304 is attached to the diversion pipe 13, and the lower end is attached to the exhaust pipe 18. The real-time monitoring detector 305 is located at the lower end of the diversion pipe 13 and is made of BC-404 stainless steel. A plastic scintillator detector is used to measure beta activity or gamma rays, and can perform preliminary nuclide identification. The signal is then converted into an electrical signal by a photodiode. The sampling tube 304 includes a tube body 3041 and an aerosol filter membrane 3042. The tube body 3041 is assembled in two parts, and the aerosol filter membrane 3042 is disposed inside the tube body 3041. An angle stepper motor 301 drives the drive shaft 302 to rotate, the drive shaft 302 drives the rotating plate 303 to rotate, and the rotating plate 303 drives the sampling tube 304 to rotate. The sampling tube 304 is switched after sampling. A real-time monitoring detector 305 disposed in the diversion tube 13 monitors the passing gas in real time. By monitoring the gas conditions in real time and sampling aerosols, combined with the comprehensive data from the wind speed sensor 21, the monitoring of aerosols in the radiation environment gas is realized.

[0031] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0032] In the description of this invention, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting; movable connection methods include, but are not limited to, sliding connection, rotating connection and threaded connection. The connection method to achieve the desired effect should be selected according to the application of the solution.

[0033] In summary, the power systems, including but not limited to motors, electric actuators, and their respective transmission systems, are equipped with protective covers according to their actual installation locations to prevent wear or damage to the power and transmission systems caused by the external environment, thereby ensuring the normal operation of the power and transmission systems.

[0034] In summary, the electronic or electrical components, including but not limited to motors and electric actuators, are existing components that are custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art and are not within the scope of protection of this invention.

[0035] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A radiation environment monitoring aerosol sampling device, comprising an inlet pipe, a lifting mechanism, a diversion pipe, a fixing frame, a sampling mechanism, an outlet pipe, and a housing; characterized in that... The air inlet pipe is located directly above the entire device and is connected to the lifting mechanism. A diversion pipe is provided at the bottom of the air inlet pipe, and a sampling mechanism is connected to the bottom of the diversion pipe. The sampling mechanism is set on a fixed frame, which is fixed inside the box. The air outlet pipe is connected to the bottom of the sampling mechanism. The sampling mechanism includes an angle stepper motor, a drive shaft, a rotating plate, a sampling tube, and a real-time monitoring detector. The angle stepper motor is mounted on a fixed frame, and the output end of the angle stepper motor is provided with a drive shaft. The rotating plate has two sets and is symmetrically fixed at the upper and lower ends of the drive shaft. The rotating plate has four sets of circular holes, and four sets of sampling tubes are provided between the two sets of rotating plates. The upper end of one set of sampling tubes is in contact with the diversion pipe, and the lower end is in contact with the gas outlet pipe. The real-time monitoring detector is set at the lower end of the diversion pipe.

2. The aerosol sampling device for radiation environment monitoring according to claim 1, characterized in that... The air intake pipe includes a filter plate, an air collection hood, a rubber hose, a telescopic pipe, a protective cover, an electric actuator, rack I, gear I, gear II, a swing rod, a clamping ring, and a slide groove I. The filter plate is located on the upper part of the air collection hood, and a rubber hose is located on the lower part of the air collection hood. A telescopic pipe is located on the lower part of the rubber hose. The electric actuator is fixed to the outer wall of the telescopic pipe. A rack I is located at the top end of the electric actuator. The rack I is also located in the slide groove I, which is fixed to the front end of the telescopic pipe. The rack I meshes with gear I, gear I meshes with gear II, and gear II is fixedly connected to the swing rod. A clamping ring is located at the front end of the swing rod, which clamps the air collection hood. The protective cover is fixed to the telescopic pipe and has a telescopic cover plate. All transmission mechanisms on the air intake pipe are located inside the protective cover.

3. The aerosol sampling device for radiation environment monitoring according to claim 1, characterized in that... The lifting mechanism includes a support platform, a positioning plate I, a motor I, a gear III, a gear IV, a threaded sleeve, a lead screw, a positioning plate II, and a telescopic protective cover. The support platform is fixed inside the housing, and the positioning plate I is provided on the support platform. The motor I is located inside the support platform, and the output end of the motor I is provided with a gear III, which meshes with gear IV. A threaded sleeve is provided in the middle of gear IV, and the threaded sleeve is fixedly connected to gear IV. The threaded sleeve is rotatably connected to the positioning plate I. The inner ring of the threaded sleeve has a thread that engages with the lead screw. The upper part of the lead screw passes through the positioning plate I and connects to the positioning plate II. The positioning plate II is fixed to the upper part of the telescopic tube. The lower part of the lead screw is located in a round hole on the support platform and does not contact the support platform. A telescopic protective cover is provided outside the lead screw, and the telescopic protective cover is also provided between the positioning plate II and the positioning plate I.

4. The aerosol sampling device for radiation environment monitoring according to claim 1, characterized in that... The upper part of the enclosure is equipped with a wind direction sensor and a wind speed sensor, the front of the enclosure is equipped with a display screen, the enclosure has multiple maintenance ports, and the lower part of the enclosure is fixed with a bracket.

5. The aerosol sampling device for radiation environment monitoring according to claim 1, characterized in that... The sampling tube includes a tube body and an aerosol filter membrane. The tube body is composed of two parts, upper and lower, which are spliced ​​together. The aerosol filter membrane is placed inside the tube body.

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