A large flow aerosol and iodine sampler

Abstract

The utility model relates to radioactive aerosol, iodine sampling field discloses a large flow aerosol and iodine sampler, including a kind of large flow aerosol and iodine sampler, including sampling unit, control unit and data processing and display unit;The sampling unit includes gas path channel, and the gas path channel is sequentially provided with air inlet module, sampling module and suction power module along air inlet direction;The air inlet module includes air inlet and the detachable protective grating of setting in air inlet;The sampling module includes the aerosol collection module for collecting aerosol and the iodine adsorption module for adsorbing iodine.Through control unit regulation and control suction power module start, while hot type mass flowmeter monitors flow, electric regulating valve adjusts opening degree, realizes the diversification of equipment operation and the accurate control of sampling flow, avoids the sampling error caused by flow fluctuation, satisfies the demand of sampling precision and operation convenience under different scenes.

Description

Technical Field

[0001] This utility model relates to the field of radioactive aerosol and iodine sampling technology, and in particular to a high-flow-rate aerosol and iodine sampler. Background Technology

[0002] Aerosols are dispersed systems composed of solid or liquid microparticles suspended in a gaseous medium. In scenarios such as nuclear facility operation and nuclear accident emergency response, radioactive aerosols can enter the human body through the respiratory tract, causing internal radiation hazards. Iodine, especially radioactive iodine-131, is a key radioactive substance that needs to be monitored in nuclear-related environments. Its chemical reactivity makes it prone to accumulation in the human thyroid gland, posing a long-term threat to human health. Both are widely present in the atmosphere surrounding nuclear facilities and in areas where nuclear accidents have leaked, and are key indicators reflecting the degree of environmental radioactive pollution. Aerosol particles need to be intercepted by specific filtration materials, while iodine often exists in gaseous form and requires adsorbents for effective capture. The differences in their existence forms and hazard mechanisms necessitate targeted sampling methods for their monitoring.

[0003] Aerosol and iodine sampling equipment is used in routine monitoring of nuclear facilities, emergency response to nuclear accidents, and environmental radiation monitoring. Its core function is to efficiently collect aerosol and iodine samples from the atmospheric environment, providing a basis for subsequent radioactive analysis. This equipment can promptly monitor changes in the concentration of radioactive materials around nuclear facilities, ensuring the safety of the surrounding environment and personnel. In nuclear accident emergency scenarios, it can quickly obtain aerosol and iodine contamination data in contaminated areas, providing a scientific basis for emergency decision-making.

[0004] Existing aerosol and iodine sampling equipment uses filtration and adsorption modules to separately trap aerosols and adsorb iodine, avoiding the problem of the two pollutants mixing and affecting subsequent analysis. However, existing equipment uses ordinary fans as the air extraction power module, and the fan power is limited, so it can only maintain a small sampling flow rate during operation. In the emergency scenario of a nuclear accident, it is difficult to collect a sufficient amount of sample in a short time, resulting in insufficient detection sensitivity and missing the emergency response window. Aerosol filter membranes are mostly single-layer or a few layers, and large particles of impurities can easily cause membrane blockage. They are also easily damaged in high humidity, acid and alkaline environments. Iodine adsorbents are mostly ordinary activated carbon, which has low iodine adsorption capacity and poor selectivity. It also easily adsorbs other gases, and subsequent desorption is complicated, affecting the accuracy of analysis. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-flow-rate aerosol and iodine sampler, which aims to improve the problem that the existing technology can only maintain a small sampling flow rate during operation, making it difficult to collect sufficient samples in a short time in nuclear accident emergency scenarios, resulting in insufficient detection sensitivity and missing the emergency response window.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-flow-rate aerosol and iodine sampler, comprising a sampling unit, a control unit, and a data processing and display unit;

[0007] The sampling unit includes an air passage, on which an air intake module, a sampling module and a suction power module are sequentially arranged along the air intake direction.

[0008] The air intake module includes an air intake and a removable protective grille disposed at the air intake;

[0009] The sampling module includes an aerosol collection module for collecting aerosols and an iodine adsorption module for adsorbing iodine.

[0010] The control unit is electrically connected to the air extraction power module and the data processing and display unit;

[0011] The data processing and display unit is used to set parameters and display the device's operating status.

[0012] As a further description of the above technical solution:

[0013] The aerosol collection module includes a filter paper clamping mechanism, which includes a detachable clamping plate and an elbow clamp for quickly pressing the clamping plate.

[0014] As a further description of the above technical solution:

[0015] The iodine adsorption module is filled with an iodine adsorbent, which is impregnated activated carbon or TEDA activated carbon.

[0016] As a further description of the above technical solution:

[0017] The gas passage is also equipped with a flow monitoring and regulation module, which includes a thermal mass flow meter and an electric regulating valve.

[0018] As a further description of the above technical solution:

[0019] The control unit is configured to receive the flow signal from the mass flow meter and control the opening of the electric regulating valve to stabilize the sampled flow rate at a set value.

[0020] As a further description of the above technical solution:

[0021] The air extraction power module uses a three-phase horizontal centrifugal fan.

[0022] As a further description of the above technical solution:

[0023] The sampling unit also includes a pressure detection module for monitoring the pressure difference before and after the aerosol collection module.

[0024] As a further description of the above technical solution:

[0025] The control unit integrates an offline voice sensor, which can receive voice commands.

[0026] As a further description of the above technical solution:

[0027] The data processing and display unit includes a touch screen and a communication interface, which is an RS485 interface or a Wi-Fi module.

[0028] As a further description of the above technical solution:

[0029] The device is equipped with casters with brakes at the bottom and is detachably connected to a fixed base.

[0030] This utility model has the following beneficial effects:

[0031] 1. In this utility model, an offline voice sensor receives voice commands, and a touch screen receives parameter setting signals. Both transmit the signals to the control unit, which then activates the suction power module. Simultaneously, a thermal mass flow meter monitors the flow rate, and an electric regulating valve adjusts the opening, all working together to maintain a stable sampling flow rate. This achieves diversified equipment operation and precise control of the sampling flow rate. Operators do not need to be in close contact with the equipment; they can complete parameter settings and activation via voice or remote control. The stable flow environment ensures the efficiency of aerosol particle interception and iodine adsorption, avoiding sampling errors caused by flow fluctuations, and meeting the needs for sampling accuracy and ease of operation in different scenarios.

[0032] 2. In this utility model, the pressure difference before and after the aerosol collection module is monitored by the pressure detection module. The pressure difference signal is transmitted to the control unit and then fed back to the data processing and display unit. When the pressure difference is abnormal, the control unit triggers an alarm and stops the suction power module. The filter paper can be replaced by loosening the elbow clamp and removing the clamp plate. The protective grid can be removed and cleaned, realizing real-time monitoring and rapid maintenance of the filter material status. It is possible to determine whether the filter paper is blocked or damaged without disassembling the main body of the equipment. Timely alarms are set to avoid invalid sampling. The detachable structure makes filter material replacement and grid cleaning simple, reduces downtime maintenance time, reduces the labor intensity of operators, and ensures continuous and stable operation of the equipment.

[0033] 3. In this utility model, the equipment is moved by universal wheels, the brake device fixes the equipment position, and the fixed base is detachably connected to the bottom of the equipment. After installation, the stability is enhanced, and after disassembly, the movement is not affected. At the same time, the communication interface transmits the sampling data to an external terminal and receives remote commands to control the equipment. This realizes the flexible deployment and remote management of the equipment in different scenarios. It can quickly adjust the sampling position to meet temporary monitoring needs, and the fixed components can ensure long-term sampling stability. Remote data transmission and control reduce on-site duty, adapt to diverse monitoring environments, and improve the practical value and scenario coverage of the equipment. Attached Figure Description

[0034] Figure 1 A flowchart of a high-flow-rate aerosol and iodine sampler proposed in this utility model;

[0035] Figure 2 This is a partial flowchart of the sampling unit in a high-flow-rate aerosol and iodine sampler proposed in this utility model.

[0036] Figure 3 This is a structural diagram illustrating the aerosol collection module in a high-flow-rate aerosol and iodine sampler proposed in this utility model.

[0037] Figure 4 This is a structural diagram illustrating the flow monitoring and adjustment module in a high-flow-rate aerosol and iodine sampler proposed in this utility model.

[0038] Figure 5 This diagram illustrates the structure of the data processing and display unit in a high-flow-rate aerosol and iodine sampler proposed in this invention.

[0039] Legend:

[0040] 1. Sampling unit; 11. Air intake module; 111. Air inlet; 112. Protective grille; 12. Sampling module; 121. Aerosol collection module; 1211. Clamping plate; 1212. Elbow clamp; 122. Iodine adsorption module; 13. Air extraction power module; 131. Three-phase horizontal centrifugal fan; 14. Flow monitoring and regulation module; 141. Mass flow meter; 142. Electric regulating valve; 15. Pressure detection module; 2. Control unit; 21. Offline voice sensor; 3. Data processing and display unit; 31. Touch screen; 32. Communication interface; 4. Casters; 41. Braking device; 5. Fixed base. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Reference Figures 1-5 The present invention provides an embodiment of a high-flow-rate aerosol and iodine sampler, comprising a sampling unit 1, a control unit 2, and a data processing and display unit 3; the control unit 2 integrates an offline voice sensor 21, which is capable of receiving voice commands;

[0043] Sampling unit 1 includes an air passage, on which an air intake module 11, a sampling module 12 and an air extraction power module 13 are arranged sequentially along the air intake direction;

[0044] The air intake module 11 includes an air intake 111 and a removable protective grille 112 disposed on the air intake 111;

[0045] The sampling module 12 includes an aerosol collection module 121 for collecting aerosols and an iodine adsorption module 122 for adsorbing iodine. The aerosol collection module 121 includes a filter paper clamping mechanism, which includes a detachable clamping plate 1211 and an elbow clamp 1212 for quickly pressing the clamping plate 1211. The iodine adsorption module 122 is filled with an iodine adsorbent, which is impregnated activated carbon or TEDA activated carbon.

[0046] The exhaust power module 13 adopts a three-phase horizontal centrifugal fan 131;

[0047] The control unit 2 is electrically connected to the air extraction power module 13 and the data processing and display unit 3;

[0048] The data processing and display unit 3 is used to set parameters and display the device's operating status.

[0049] Specifically, after receiving a voice command, the offline voice sensor 21 integrated in the control unit 2 converts the command into an electrical signal and transmits it to the control unit 2; the data processing and display unit 3 receives the parameter setting signal input by the operator and also transmits it to the control unit 2; after processing the received signal, the control unit 2 sends a start or adjustment signal to the air extraction power module 13, and at the same time feeds back the basic status information of the equipment operation to the data processing and display unit 3, which then presents this information in a visual form.

[0050] The three-phase horizontal centrifugal fan 131 of the air extraction power module 13 starts after receiving the start signal from the control unit 2. It generates negative pressure by rotating, forming a continuous airflow in the air passage of the sampling unit 1. Under the action of negative pressure, external air enters the air passage from the air inlet 111 of the air intake module 11. The detachable protective grille 112 at the air inlet 111 initially intercepts the incoming air, preventing large impurities in the air from entering subsequent modules and avoiding air passage blockage or component damage caused by impurities. When a lot of impurities are attached to the surface of the protective grille 112, the protective grille 112 can be directly removed for cleaning or replacement. After cleaning or replacement, it is reinstalled at the air inlet 111 to ensure smooth air intake.

[0051] The air, initially filtered by the protective grille 112, continues to flow along the air passage to the sampling module 12. The aerosol collection module 121 of the sampling module 12 first comes into contact with the airflow. In the filter paper clamping mechanism of the aerosol collection module 121, the detachable clamp 1211 is used to place the sampling filter paper. The elbow clamp 1212 presses the clamp 1211 to make the sampling filter paper flat and tightly fixed in the airflow path. When the air passes through the filter paper, the aerosol particles in the air are intercepted by the filter paper, completing the aerosol collection. The pressing action of the elbow clamp 1212 ensures that the filter paper will not shift under the impact of the airflow, ensuring the stability of aerosol collection.

[0052] After passing through the filter paper, the air that has completed aerosol collection continues to flow along the gas path and enters the iodine adsorption module 122. The iodine adsorption module 122 is filled with impregnated activated carbon or TEDA activated carbon, which can effectively adsorb iodine in the air. When the air containing iodine flows through the adsorbent, iodine molecules are captured by the active sites on the surface of the adsorbent, thus achieving iodine sampling. The aerosol collection module 121 and the iodine adsorption module 122 are arranged sequentially along the gas path, so that the air first passes through aerosol collection and then undergoes iodine adsorption. This avoids aerosol particles adhering to the surface of the adsorbent and affecting the iodine adsorption efficiency. At the same time, it prevents adsorbent particles from falling off and mixing into the aerosol sample, ensuring that the two sampling processes do not interfere with each other.

[0053] During equipment operation, control unit 2 continuously receives parameter signals transmitted by data processing and display unit 3 and adjusts the operating status of suction power module 13 according to preset parameters. If it is necessary to adjust the sampling flow rate, control unit 2 sends a power adjustment signal to suction power module 13. The three-phase horizontal centrifugal fan 131 adjusts the suction force by changing the speed, thereby changing the airflow speed in the air passage and realizing the adjustment of sampling flow rate. The adjusted flow rate information is fed back to data processing and display unit 3 through control unit 2, and data processing and display unit 3 updates and displays the current flow rate in real time.

[0054] During equipment operation, the data processing and display unit 3 continuously displays the equipment's operating status, including sampling time, current sampling flow rate, and cumulative sampling volume. Operators can monitor the equipment's operation in real time by viewing the content displayed on the data processing and display unit 3. If the equipment malfunctions, such as airflow interruption or component failure, the control unit 2 transmits the abnormal signal to the data processing and display unit 3. The data processing and display unit 3 then displays the abnormality in a specific way, making it easier for operators to detect and handle the issue promptly.

[0055] When sampling needs to be stopped, the operator can send a stop command through the data processing and display unit 3 or through the offline voice sensor 21. After the command is transmitted to the control unit 2, the control unit 2 sends a stop signal to the air extraction power module 13, the three-phase horizontal centrifugal fan 131 stops running, the airflow in the air passage disappears, and the sampling process terminates. After the sampling is terminated, the data processing and display unit 3 saves the relevant data of this sampling, including the sampling duration and total sampling flow rate, for easy subsequent query and analysis.

[0056] During maintenance of sampling module 12, for aerosol collection module 121, the operator loosens elbow clamp 1212, removes clamp plate 1211, takes out the used filter paper, replaces it with new sampling filter paper, reinstalls clamp plate 1211 and tightens it with elbow clamp 1212 to complete filter paper replacement; for iodine adsorption module 122, when the adsorbent reaches saturation, the sealing structure of iodine adsorption module 122 can be opened, the old adsorbent inside can be taken out, new impregnated activated carbon or TEDA activated carbon can be filled in, and then the iodine adsorption module 122 can be sealed to complete adsorbent replacement.

[0057] The detachable protective grille 112 of the air intake module 11, the detachable clamp 1211 and elbow clamp 1212 of the aerosol collection module 121, and the replaceable adsorbent of the iodine adsorption module 122 together constitute the easy-to-maintain structure of the equipment, reducing the difficulty of maintenance operations; the signal processing capability of the control unit 2 and the information presentation function of the data processing and display unit 3 work together to realize the automated control and status monitoring of the equipment; the stable suction power provided by the suction power module 13 ensures that the airflow in the gas passage is continuous and stable, providing a foundation for the efficient sampling of aerosols and iodine; through signal transmission and functional cooperation, the various structures work together to realize the sampling, control and monitoring functions of the equipment, meeting the usage requirements of aerosol and iodine sampling.

[0058] Please see the appendix Figure 1 - Appendix Figure 4 The gas path channel is also equipped with a flow monitoring and regulation module 14, which includes a thermal mass flow meter 141 and an electric regulating valve 142; the control unit 2 is configured to receive the flow signal from the mass flow meter 141 and control the opening of the electric regulating valve 142 to stabilize the sampled flow rate at the set value.

[0059] Specifically, the thermal mass flow meter 141 of the flow monitoring and regulation module 14 is installed on the gas path channel of the sampling unit 1 to sense the flow rate changes of the airflow in the gas path channel in real time; the electric regulating valve 142 is also installed on the gas path channel to adjust the flow cross section of the gas path channel by changing its own opening, thereby changing the airflow resistance; the control unit 2 is electrically connected to the thermal mass flow meter 141 and the electric regulating valve 142 respectively, receives the signal transmitted by the thermal mass flow meter 141, and sends control commands to the electric regulating valve 142;

[0060] When the three-phase horizontal centrifugal fan 131 of the air extraction power module 13 starts and airflow is formed in the air passage, the thermal mass flow meter 141 converts the airflow into a corresponding electrical signal, i.e., a flow signal, through the thermal measurement principle. The thermal mass flow meter 141 continuously transmits the generated flow signal to the control unit 2, so that the control unit 2 can obtain the actual sampling flow in the air passage in real time.

[0061] After receiving the flow signal from the thermal mass flow meter 141, the control unit 2 compares the signal with the preset flow setting value of the data processing and display unit 3. If the actual flow rate is higher than the set value, the control unit 2 generates a control signal to reduce the opening degree and transmits it to the electric regulating valve 142. After receiving the signal, the electric regulating valve 142 reduces its own opening degree, reduces the flow cross section of the air passage, increases the airflow resistance in the passage, thereby reducing the airflow speed and making the actual flow rate closer to the set value.

[0062] If the actual flow rate is lower than the set value, the control unit 2 generates a control signal to increase the opening degree and sends it to the electric regulating valve 142. After receiving the signal, the electric regulating valve 142 expands its own opening degree, increases the flow cross section of the air passage, reduces the airflow resistance, increases the airflow speed, and makes the actual flow rate rise to the set value range.

[0063] Throughout the sampling process, the thermal mass flow meter 141 continuously monitors the flow rate and transmits signals to the control unit 2. The control unit 2 continuously compares the actual flow rate with the set value and dynamically adjusts the opening of the electric regulating valve 142 based on the comparison results. This continuous monitoring and adjustment forms a closed-loop control to ensure that the sampling flow rate in the gas passage remains stable within the set value range.

[0064] The operating status data of the flow monitoring and regulation module 14, including the real-time flow monitored by the thermal mass flow meter 141 and the current opening degree of the electric regulating valve 142, are transmitted to the data processing and display unit 3 through the control unit 2. The data processing and display unit 3 presents these data in a visual form, which makes it easy for operators to grasp the flow control status in real time.

[0065] The real-time monitoring of the thermal mass flow meter 141 provides an accurate basis for flow regulation, avoiding deviations in the sampled flow rate from the set value due to factors such as fluctuations in pumping power and changes in gas path resistance. The opening adjustment of the electric regulating valve 142 directly affects the gas path flow rate. Combined with the signal processing capability of the control unit 2, it achieves rapid response and precise control of the flow rate. The operation of this module ensures that the filter paper of the aerosol collection module 121 is always in a stable airflow environment, ensuring the aerosol particle interception efficiency. At the same time, it allows the adsorbent in the iodine adsorption module 122 to fully contact the airflow, improving the iodine adsorption effect and providing support for sampling accuracy.

[0066] Please see the appendix Figure 2 The sampling unit 1 also includes a pressure detection module 15, which is used to monitor the pressure difference before and after the aerosol collection module 121.

[0067] Specifically, the two detection ends of the pressure detection module 15 are respectively deployed on the inlet side and outlet side of the aerosol collection module 121 to collect pressure data on both sides in real time and calculate the difference to form a differential pressure signal. The differential pressure signal is transmitted to the control unit 2 through an electrical connection. After processing the differential pressure data, the control unit 2 further transmits it to the data processing and display unit 3, which then presents the real-time differential pressure value.

[0068] During the sampling process, as the filter paper of the aerosol collection module 121 traps more and more aerosol particles, the air permeability of the filter paper decreases, resulting in an increase in the pressure on the inlet side and a relative decrease in the pressure on the outlet side, and the pressure difference between the two increases accordingly. If the filter paper is damaged, the airflow resistance decreases sharply, and the pressure difference before and after the aerosol collection module 121 will quickly drop to an abnormal range.

[0069] The pressure detection module 15 continuously monitors and transmits the differential pressure signal, providing a basis for judging the status of the filter paper: when the differential pressure exceeds the upper limit of the preset normal range, it prompts that the filter paper needs to be cleaned or replaced; when the differential pressure drops abnormally, the control unit 2 triggers the fault indicator alarm of the data processing and display unit 3 and sends a stop signal to the suction power module 13 to terminate the sampling process and avoid sampling accuracy deviation caused by damaged filter paper.

[0070] The monitoring function of the pressure detection module 15 works in conjunction with the flow monitoring and regulation module 14 to provide a pressure reference for flow regulation when changes in the filter paper state cause fluctuations in air path resistance. This ensures that when the control unit 2 adjusts the opening of the electric regulating valve 142, it takes into account both flow stability and filter paper state, thus guaranteeing the continuity and reliability of the sampling process.

[0071] Please see the appendix Figure 5 The data processing and display unit 3 includes a touch screen 31 and a communication interface 32, which is an RS485 interface or a Wi-Fi module.

[0072] Specifically, the touch screen 31 serves as a human-machine interface, allowing operators to input parameters such as sampling time and flow rate setpoints. These parameters are then transmitted to the control unit 2, which in turn regulates the operation of the suction power module 13 and the flow monitoring and adjustment module 14. Simultaneously, the touch screen 31 receives equipment operation data from the control unit 2 and displays the sampling flow rate, cumulative volume, pressure difference before and after the aerosol collection module 121, and equipment status in real time, enabling operators to intuitively monitor the sampling process.

[0073] The communication interface 32 adopts an RS485 interface or a Wi-Fi module to connect to an external terminal via wired or wireless means. On the one hand, it transmits the sampling data stored in the data processing and display unit 3, such as sampling duration and flow curve, to the external terminal for subsequent analysis. On the other hand, it receives remote commands sent by the external terminal. The commands are transmitted to the control unit 2 via the data processing and display unit 3 to realize remote start / stop sampling, parameter adjustment, and other operations.

[0074] When the pressure detection module 15 detects an abnormal pressure difference in the aerosol collection module 121, or the flow monitoring and regulation module 14 reports an abnormal flow, the control unit 2 transmits the fault signal to the data processing and display unit 3. The touch screen 31 displays the fault prompt simultaneously, and the communication interface 32 can push the fault information to the external terminal to ensure that the operator is aware of and can handle it in a timely manner, thus ensuring the reliability of sampling.

[0075] Please see the appendix Figure 1 The bottom of this equipment is equipped with casters 4 with brake devices 41 and is detachably connected to a fixed base 5.

[0076] Specifically, the casters 4 are installed at the bottom of the equipment and can rotate in any direction. When the equipment is pushed, the casters 4 roll and drive the entire equipment to move, meeting the adjustment needs of different sampling positions. The brake device 41 is linked with the casters 4. When the equipment moves to the target sampling position, the brake device 41 is triggered to limit the rotation of the casters 4, so that the equipment can maintain a stable position and avoid the equipment from shifting due to airflow impact or slight collision during the sampling process.

[0077] The fixed base 5 is connected to the bottom of the equipment through a detachable structure. When the equipment needs to be sampled in a fixed position for a long time, installing the fixed base 5 can increase the contact area between the equipment and the ground, improve the overall stability of the equipment when it is placed, and prevent the equipment from tipping over. If the equipment needs to be moved again, the fixed base 5 can be removed without affecting the normal rotation of the casters 4 and the movement of the equipment, thus adapting to the different needs of temporary and long-term sampling scenarios.

[0078] Working Principle: Before starting the equipment, operators can set parameters in two ways: First, by directly operating the touchscreen 31 of the data processing and display unit 3 and inputting parameters such as sampling time and flow rate setting on the interface. The parameter signals are transmitted to the control unit 2 via the data processing and display unit 3. Second, by sending voice commands through the offline voice sensor 21 integrated in the control unit 2. The offline voice sensor 21 converts the voice signal into an electrical signal and transmits it to the control unit 2. After receiving the parameter signals, the control unit 2 synchronously feeds back to the data processing and display unit 3. The touchscreen 31 displays the set parameter information in real time for operator confirmation. If remote operation is required, it can be achieved through the communication interface 32. When using the RS485 interface, an external terminal is connected via a wired connection. The parameter commands sent by the external terminal are transmitted to the data processing and display unit 3 via the communication interface 32 and then forwarded to the control unit 2. When using the Wi-Fi module, the command transmission is completed through wireless signals, ensuring accurate setting of sampling parameters in different scenarios. After confirming that the parameters are correct, the operator can click the start button on the touchscreen 31 or send a start command through the offline voice sensor 21, and the equipment will enter the sampling process.

[0079] After receiving the start command, the control unit 2 sends a start signal to the air extraction power module 13. The three-phase horizontal centrifugal fan 131 of the air extraction power module 13 starts and generates negative pressure in the air passage of the sampling unit 1 through high-speed rotation. Under the action of negative pressure, the outside air enters the air passage from the air inlet 111 of the air intake module 11 and first comes into contact with the detachable protective grille 112 at the air inlet 111. The protective grille 112 performs preliminary filtration of the air, intercepting large impurities such as leaves and stones in the air, preventing impurities from entering subsequent modules and causing air passage blockage or damage to components. As the sampling time goes on, when there is a lot of impurities on the surface of the protective grille 112, the protective grille 112 can be directly removed for cleaning. After cleaning, it is reinstalled to the air inlet 111 to ensure smooth air intake.

[0080] The air, after initial filtration, continues to flow along the air passage and enters the aerosol collection module 121 of the sampling module 12. In the filter paper clamping mechanism of the aerosol collection module 121, a detachable clamping plate 1211 is used to support the sampling filter paper. Before sampling, the operator places the filter paper on the clamping plate 1211 and quickly presses the clamping plate 1211 with the elbow clamp 1212 to make the filter paper flat and tightly attached to the airflow path. When air passes through the filter paper, aerosol particles in the air are trapped by the filter paper, realizing aerosol collection. The clamping force of the elbow clamp 1212 ensures that the filter paper will not shift or wrinkle under the impact of airflow, ensuring the uniformity and stability of aerosol particle trapping.

[0081] After passing through the filter paper, the air that has completed aerosol collection continues to flow along the gas path and enters the iodine adsorption module 122. The iodine adsorption module 122 is filled with impregnated activated carbon or TEDA activated carbon, the surface of which has active adsorption sites for iodine molecules. When the air containing iodine flows through the adsorbent, the iodine molecules are captured by the adsorbent, thus achieving iodine sampling. Since the aerosol collection module 121 and the iodine adsorption module 122 are arranged sequentially along the gas path, the air first passes through aerosol filtration and then undergoes iodine adsorption. This avoids aerosol particles adhering to the surface of the adsorbent and clogging the active sites, and at the same time prevents adsorbent particles from falling off and mixing into the aerosol sample. This ensures that the two sampling processes do not interfere with each other and improves sampling accuracy.

[0082] During the airflow through the sampling module 12, the flow monitoring and regulation module 14 operates synchronously. The thermal mass flow meter 141 monitors the airflow in the gas path in real time, converting the flow into an electrical signal, i.e., a flow signal, through the thermal measurement principle, and continuously transmits it to the control unit 2. The control unit 2 compares the received actual flow signal with the preset flow set value of the data processing and display unit 3. If the actual flow is higher than the set value, the control unit 2 sends a control signal to the electric regulating valve 142 to reduce its opening. After receiving the signal, the electric regulating valve 142 reduces its opening, decreases the flow cross-section of the gas path, increases the airflow resistance, thereby reducing the airflow velocity and bringing the actual flow closer to the set value. If the actual flow is lower than the set value, the control unit 2 sends a signal to increase its opening. The electric regulating valve 142 expands the flow cross-section, reduces the airflow resistance, increases the airflow velocity, and brings the actual flow to the set value range. Throughout the sampling process, this closed-loop control continues to ensure that the flow in the gas path remains stable at the set value, providing stable airflow conditions for the efficient sampling of aerosols and iodine.

[0083] Meanwhile, the pressure detection module 15 of the sampling unit 1 monitors the pressure difference before and after the aerosol collection module 121. The two detection terminals of the pressure detection module 15 are respectively deployed on the inlet and outlet sides of the aerosol collection module 121, collecting pressure data from both sides in real time and calculating the difference to form a pressure difference signal. The pressure difference signal is transmitted to the control unit 2 via an electrical connection. After processing, the control unit 2 feeds the data back to the data processing and display unit 3, and the touch screen 31 displays the real-time pressure difference value. As the sampling time progresses, the filter paper section of the aerosol collection module 121... As the number of retained aerosol particles gradually increases, the air permeability of the filter paper decreases, leading to an increase in the pressure on the inlet side and a decrease in the pressure on the outlet side, resulting in a greater pressure difference between the two. When the pressure difference exceeds the upper limit of the preset normal range, the touch screen 31 displays a prompt that the filter paper needs to be replaced. If the filter paper is damaged, the airflow resistance decreases sharply, and the pressure difference will quickly drop to the abnormal range. At this time, the control unit 2 immediately sends a stop signal to the air extraction power module 13, the three-phase horizontal centrifugal fan 131 stops running, and at the same time triggers the fault indicator alarm of the data processing and display unit 3 to avoid sampling accuracy deviation caused by damaged filter paper.

[0084] The data processing and display unit 3 continuously plays a role in data interaction and status monitoring throughout the sampling process: In addition to displaying parameter setting information, real-time flow rate, and differential pressure data, the touch screen 31 also simultaneously displays the sampling time, cumulative sampling volume, and equipment operating status, such as normal operation or fault shutdown; operators can intuitively grasp the equipment operation status through the touch screen 31; the communication interface 32 transmits the sampling data stored in the data processing and display unit 3, such as flow rate change curves and sampling duration records, to the external terminal in real time for subsequent data analysis; if the external terminal needs to remotely intervene in the sampling process, it can send a command to stop sampling or adjust parameters. The command is transmitted to the data processing and display unit 3 via the communication interface 32 and then forwarded to the control unit 2 to realize remote control;

[0085] During the equipment deployment phase, the bottom movable fixing components meet the needs of different scenarios: if the sampling position needs to be adjusted, when pushing the equipment, the casters 4 can rotate in any direction, driving the entire equipment to move flexibly to adapt to different sampling points; after moving to the target position, the brake device 41 is triggered to restrict the rotation of the casters 4, keeping the equipment in a stable position and preventing the equipment from shifting due to airflow impact or slight collision during sampling; if the equipment needs to sample in a fixed position for a long time, the fixing base 5 can be connected to the bottom of the equipment through a detachable structure. The fixing base 5 increases the contact area between the equipment and the ground, improves the stability of the equipment, and prevents the equipment from tipping over; when the equipment needs to be moved again, the fixing base 5 can be removed, and the brake device 41 can be released to push the equipment, taking into account both the convenience of movement and the stability of the fixation.

[0086] When the sampling reaches the preset time or cumulative volume, the control unit 2 automatically sends a stop signal to the air extraction power module 13, the three-phase horizontal centrifugal fan 131 stops running, the airflow in the air passage disappears, and the sampling process terminates. After the sampling terminates, the data processing and display unit 3 automatically saves the complete data of this sampling, including sampling time, average flow rate, cumulative volume, pressure difference change records, etc., for easy subsequent query and analysis. If the operator needs to replace the filter material, he / she can loosen the elbow clamp 1212, remove the clamp plate 1211, take out the used filter paper and replace it with a new filter paper, and then tighten the clamp plate 1211 again. If the adsorbent of the iodine adsorption module 122 reaches saturation, its sealing structure can be opened, the old adsorbent can be taken out and new impregnated activated carbon or TEDA activated carbon can be filled. After maintenance is completed, the equipment can be started at any time to enter the next round of sampling.

[0087] The equipment as a whole forms a complete sampling control system through signal transmission and functional coordination. The control unit 2 serves as the core, receiving and processing various signals and regulating the operation of each execution module. The sampling unit 1 completes air filtration, aerosol and iodine collection. The data processing and display unit 3 realizes human-machine interaction and data transmission. The mobile and fixed components ensure the flexibility of equipment deployment. The overall structure not only meets the requirements of high-precision and automated sampling of aerosols and iodine, but also reduces the difficulty of operation and maintenance.

[0088] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-flow-rate aerosol and iodine sampler, characterized in that, The device includes a sampling unit (1), a control unit (2), and a data processing and display unit (3). The sampling unit (1) includes an air passage with an air intake module (11), a sampling module (12), and a suction power module (13) arranged sequentially along the air intake direction. The air intake module (11) includes an air inlet (111) and a detachable protective grille (112) disposed at the air inlet (111). The sampling module (12) includes an aerosol collection module (121) for collecting aerosols and an iodine adsorption module (122) for adsorbing iodine. The control unit (2) is electrically connected to the suction power module (13) and the data processing and display unit (3). The data processing and display unit (3) is used to set parameters and display the device's operating status.

2. The high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The aerosol collection module (121) includes a filter paper clamping mechanism, which includes a detachable clamping plate (1211) and an elbow clamp (1212) for quickly pressing the clamping plate (1211).

3. The high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The iodine adsorption module (122) is filled with iodine adsorbent, which is impregnated activated carbon or TEDA activated carbon.

4. A high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The gas passage is also equipped with a flow monitoring and regulation module (14), which includes a thermal mass flow meter (141) and an electric regulating valve (142).

5. A high-flow-rate aerosol and iodine sampler according to claim 4, characterized in that, The control unit (2) is configured to receive the flow signal from the mass flow meter (141) and control the opening of the electric regulating valve (142) to stabilize the sampled flow rate at a set value.

6. A high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The air extraction power module (13) adopts a three-phase horizontal centrifugal fan (131).

7. A high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The sampling unit (1) also includes a pressure detection module (15) for monitoring the pressure difference before and after the aerosol collection module (121).

8. A high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The control unit (2) integrates an offline voice sensor (21) that can receive voice commands.

9. A high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The data processing and display unit (3) includes a touch screen (31) and a communication interface (32), wherein the communication interface (32) is an RS485 interface or a Wi-Fi module.

10. A high-flow-rate aerosol and iodine sampler according to claim 1, characterized in that, The sampler is equipped with casters (4) with brakes (41) at the bottom and is detachably connected to a fixed base (5).

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