CN103115802B - Radioactive aerosol sampling device - Google Patents

Abstract

The invention discloses a radioactive aerosol sampling device. The radioactive aerosol sampling device is suitable for being fixed on an aircraft, comprising: a sampling tube having a sampling chamber inside; Aerosol in the gas of chamber; Detection component, described detection component comprises temperature and humidity sensor, air pressure sensor, flow rate sensor and GPS antenna; Processor component, described processor component is connected with described detection component to convert analog signal into and store the digital signal; and a power supply, the power supply is respectively connected with the processor component and the detection component to supply power to the processor component and the detection component. The radioactive aerosol sampling device 1 according to the embodiment of the present invention has the advantages of small size, short sampling time, wide sampling area, unlimited sampling location, large collection volume, comprehensive data collection, and can improve the safety of staff in the accident area. .

Description

Radioactive Aerosol Sampling Device

technical field

The invention relates to the field of radioactive atmospheric environment monitoring, in particular to a radioactive aerosol sampling device.

Background technique

Radioactive aerosol monitoring is an important part of atmospheric environmental protection. It is of great significance for the timely detection of abnormal radioactive leakage in nuclear industry production and the implementation of atmospheric environmental pollution control. However, the current radioactive environmental monitoring has the following problems: after an accident, the accident area is highly radioactive, and it is not suitable for staff to enter to carry out ground sampling; the distribution of radioactive aerosols is large, and the cost of personnel evacuation is high. Therefore, how to carry out high-efficiency aerosol sampling in a large area under the premise of ensuring the safety of staff has become a problem in emergency monitoring of radioactive environments.

The existing radioactive aerosol sampling device adopts ground active sampling, mainly including air pump, sampling chamber, deflector and other structures. The power is generated by pumping air through the air pump, and the aerosol particles are collected by membrane filtration in the sampling chamber. . This kind of radioactive aerosol sampling device not only has a large volume, a long sampling time, and a small sampling coverage area, but also has certain restrictions on the sampling location due to the power supply requirements of the air extractor, so that the radioactive aerosol sampling device is only suitable for specific locations. sampling.

Some air pollution observation samplers use aerial sampling, but the sampling tube is perpendicular to the airflow direction and has a corner, resulting in more aerosol loss and a small amount of aerosol collection, making it difficult to detect low activity levels.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to propose a radioactive gas radioactive gas that is small in size, short in sampling time, wide in sampling area, unrestricted in sampling locations, large in collection volume, comprehensive in data collection, and capable of improving the safety of workers in accident areas. Sol sampling device.

In order to achieve the above object, the present invention proposes a radioactive aerosol sampling device, which is suitable for being fixed on an aircraft, including: a sampling tube, which has a sampling tube that passes through the sampling tube along the front and rear directions. Cavity; sampling assembly, the sampling assembly is arranged on the sampling tube for collecting the aerosol in the gas flowing through the sampling chamber; detection assembly, the detection assembly includes the sampling assembly for detecting A temperature and humidity sensor for the temperature and humidity of the gas passing through the sampling assembly, an air pressure sensor for detecting the pressure of the gas passing through the sampling assembly, a flow rate sensor for detecting the flow rate of the gas passing through the sampling assembly, and The GPS antenna for detecting sampling time, sampling latitude and longitude and sampling height on the sampling pipe; the processor assembly, which is arranged on the sampling pipe, and the processor assembly is connected with the detection assembly so that the The processor component converts the analog signal of the detection component into a digital signal and stores the digital signal; and a power supply, the power supply is connected with the processor component and the detection component respectively to supply the Power is supplied to the processor component and the detection component.

The radioactive aerosol sampling device according to the embodiment of the present invention can passively collect aerosol particles in the air by using the aerodynamic force generated when the aircraft is in flight by being fixed on the aircraft. In this way, the safety of the staff taking samples in the accident area can be guaranteed, especially the ground places where the staff should not be close to in the initial stage of the nuclear accident. It can avoid the injury to the staff in the high radioactivity occasion in the nuclear emergency. And the use of aircraft for sampling can not only greatly improve the sampling efficiency and greatly shorten the sampling time, but also have a wider sampling range.

In addition, the radioactive aerosol sampling device not only does not need to be equipped with an air extractor, but also the processor assembly is small in size and low in power, and only the power supply is needed to complete continuous sampling and data storage in the air for not less than 20 hours , so that the existing active radioactive aerosol sampling device can get rid of the demand for high-power power supply, so that the sampling location is not limited.

In addition, the sampling cavity of the sampling tube is positioned along the front-to-back direction, so that the sampling cavity can be consistent with the flow direction of the airflow, thereby increasing the collection volume of the radioactive aerosol sampling device. Moreover, the sampling pipe is a straight pipe structure without corners, thereby reducing the loss of aerosol, thereby further increasing the collection amount of the radioactive aerosol sampling device to realize low activity level detection. The radioactive aerosol sampling device can detect the time of sampling, the latitude and longitude of sampling and the height of sampling by setting the GPS antenna, that is, the parameters of the sampling environment can be detected in real time, so that the data collection of the radioactive aerosol sampling device can It is more comprehensive, so that it can provide data support for the radioactivity analysis of subsequent samples.

Therefore, the radioactive aerosol sampling device according to the embodiment of the present invention has the advantages of small size, short sampling time, wide sampling area, unlimited sampling location, large collection amount, comprehensive data collection, and can improve the safety of workers in the accident area, etc. advantage.

In addition, the radioactive aerosol sampling device according to the present invention also has the following additional technical features:

According to an embodiment of the present invention, the sampling tube includes: a first sampling sub-tube, the first sampling sub-tube has a first sampling sub-cavity passing through the first sampling sub-tube in the front-to-back direction; and a second sampling sub-tube. A sub-tube, the second sampling sub-tube has a second sampling sub-cavity passing through the second sampling sub-tube along the front and rear direction, the front end of the second sampling sub-tube is connected to the rear end of the first sampling sub-tube And the second sampling sub-cavity communicates with the first sampling sub-cavity, wherein the sampling component is arranged between the first sampling sub-pipe and the second sampling sub-pipe. In this way, samples can be taken from the sampling component more conveniently.

According to an embodiment of the present invention, the sampling tube is made of polyvinyl chloride, and the inner surface of the sampling tube is a polished surface. In this way, not only the weight of the sampling tube can be reduced, but also the aerosol particles can be easily adhered to the sampling assembly.

According to an embodiment of the present invention, the first sampling sub-pipe and the second sampling sub-pipe are connected through a front flange and a rear flange, and the sampling assembly is located between the front flange and the rear flange between. In this way, not only the first sampling sub-tube and the second sampling sub-tube can be firmly and detachably connected, but also the sampling assembly can be more conveniently fixed on the sampling tube.

According to an embodiment of the present invention, the sampling tube is provided with a fixing frame, and the processor assembly and the power supply are arranged on the fixing frame. Therefore, the processor assembly and the power supply can be installed on the sampling tube more conveniently, and the stability of the processor assembly and the power supply on the sampling tube can be improved.

According to an embodiment of the present invention, the fixing frame includes a front bracket arranged at the front end of the second sampling sub-tube, a rear bracket arranged at the rear end of the second sampling sub-tube, and the front bracket and the The horizontal support connected to the rear support, the processor assembly and the power supply are installed on the horizontal support. Therefore, the stability of the processor assembly and the power supply on the sampling tube can be further improved, and the fixing frame has a simple structure, is easy to manufacture, and is convenient to install and disassemble.

According to an embodiment of the present invention, a protective box is arranged on the horizontal support, and the processor assembly and the power supply are arranged in the protective box. In this way, the processor assembly can be protected by the protective box to prevent the processor assembly from being damaged, and the appearance of the radioactive aerosol sampling device can be more orderly and beautiful.

According to an embodiment of the present invention, the sampling assembly includes: a bracket, the bracket is arranged between the first sampling sub-tube and the second sampling sub-tube; and a filter, the filter is arranged on the on the bracket and between the first sampling sub-tube and the second sampling sub-tube. Therefore, the filter element can be supported by the support to prevent the filter element from being damaged by the impact of the airflow.

According to an embodiment of the present invention, the support is a wire mesh, and the filter element is a filter membrane. In this way, not only can the support prevent the flow of airflow in the sampling cavity, but also the collection capacity of the radioactive aerosol sampling device can be further increased.

According to an embodiment of the present invention, the sampling assembly further includes an airflow conditioning element, and the airflow conditioning element has an airflow cavity passing through the airflow conditioning element along the front and rear directions, and the cross-sectional area of the airflow cavity is along the The flow direction of the gas in the air flow cavity decreases, the front end of the air flow conditioning member is connected to the rear surface of the bracket and the rear end extends into the second sampling sub-cavity, the temperature and humidity sensor, the air pressure sensor and The flow rate sensor is arranged on the airflow conditioning part and the flow rate sensor is located at the air outlet of the airflow cavity. In this way, not only can a stable wind velocity field be formed at the rear end of the air flow chamber, but also the accuracy of detection results of the flow velocity sensor can be improved.

According to an embodiment of the present invention, a front gasket is provided between the first sampling sub-pipe and the filter element, a middle gasket is provided between the filter element and the support, and the support and the airflow adjustment A back gasket is provided between the pieces. Therefore, not only the structure of the sampling assembly can be made more stable, the filter element can be protected from damage, but also the airtightness of the radioactive aerosol sampling device can be improved.

According to an embodiment of the present invention, the processor component includes a GPS conversion module connected to the GPS antenna, a temperature and humidity conversion module connected to the temperature and humidity sensor, an air pressure conversion module connected to the air pressure sensor, and The flow rate conversion module connected to the flow rate sensor, the storage module, and the processor respectively connected to the GPS conversion module, the temperature and humidity conversion module, the air pressure conversion module, the flow rate conversion module, and the storage module. The processor assembly has the advantages of comprehensive performance, simple structure, low power and the like.

According to an embodiment of the present invention, the processor component further includes a wireless communication module, and the wireless communication module is connected to the processor so that the processor transmits the digital signal to a computer through the wireless communication module. Therefore, the detection results of the detection components can be transmitted to the ground in real time, so as to provide timely data support for emergency decision-making.

According to an embodiment of the present invention, the radioactive aerosol sampling device further includes a mounting frame suitable for being mounted on the aircraft, and the sampling tube is arranged on the mounting frame. Costs can thus be reduced and the safety of the aircraft can be increased.

According to an embodiment of the present invention, the installation frame includes a bottom plate, a plurality of installation frames arranged on the bottom plate at intervals along the front-rear direction, top beams respectively connected to the plurality of installation frames, and a plurality of installation frames arranged on the bottom plate. The aircraft connecting piece on the top beam and suitable for connecting with the aircraft, the installation space is defined between the bottom plate, the plurality of installation frames and the top beam, the sampling pipe, the sampling assembly, the The detection component, the processor component and the power supply are installed on the bottom board and located in the installation space. Therefore, the stability of the sampling tube, the sampling assembly, the detection assembly, the processor assembly and the power supply on the installation frame can be improved, and the structure of the installation frame is stable and easy to manufacture .

According to an embodiment of the present invention, the installation frame further includes a sampling tube fixing piece, and the sampling tube is installed on the bottom plate through the sampling tube fixing piece. Therefore, the stability of the sampling tube, the sampling assembly, the detection assembly, the processor assembly and the power supply on the installation frame can be further improved.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural view of a radioactive sampling device according to an embodiment of the present invention;

2 is an exploded view of a radioactive sampling device according to an embodiment of the present invention;

3 is a schematic structural diagram of a processor component of a radioactive sampling device according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a sampling device according to another embodiment of the present invention.

Computer 2, radioactive aerosol sampling device 1, sampling tube 100, sampling chamber 110, first sampling sub-pipe 120, second sampling sub-pipe 130, sampling assembly 200, bracket 210, filter element 220, airflow conditioning element 230, front gasket 240, middle gasket 250, rear gasket 260, detection assembly 300, temperature and humidity sensor 310, air pressure sensor 320, flow rate sensor 330, GPS antenna 340, processor assembly 400, GPS conversion module 410, temperature and humidity conversion module 420, air pressure conversion module 430, flow rate conversion module 440, storage module 450, processor 460, wireless communication module 470, front flange 500, rear flange 600, fixing frame 700, front bracket 710, rear bracket 720, horizontal bracket 730, protection box 731, Bottom plate 810 , installation frame 820 , top beam 830 , aircraft connecting piece 840 , sampling tube fixing piece 850 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The following describes a radioactive aerosol sampling device 1 according to an embodiment of the present invention with reference to FIGS. 1-4 . As shown in Figures 1-4, the radioactive aerosol sampling device 1 according to the embodiment of the present invention is suitable for being fixed on an aircraft and the radioactive aerosol sampling device 1 includes a sampling tube 100, a sampling assembly 200, a detection assembly 300, and a processor assembly 400 and power supply (not shown in the figure).

The sampling tube 100 has a sampling chamber 110 passing through the sampling tube 100 along the front and rear directions (the front and rear directions are shown by arrow A in FIG. 1 , FIG. 2 and FIG. 4 ). The sampling assembly 200 is arranged on the sampling tube 100 for collecting the aerosol in the gas flowing through the sampling chamber 110 . The detection assembly 300 includes a temperature and humidity sensor 310 arranged on the sampling assembly 200 for detecting the temperature and humidity of the gas passing through the sampling assembly 200, an air pressure sensor 320 for detecting the pressure of the gas passing through the sampling assembly 200, and a pressure sensor 320 for detecting The flow rate sensor 330 of the gas flow rate of the component 200 and the GPS antenna 340 provided on the sampling pipe 100 for detecting sampling time, sampling latitude and longitude, and sampling altitude. The processor component 400 is arranged on the sampling tube 100, and the processor component 400 is connected with the detection component 300 so that the processor component 400 converts the analog signal of the detection component 300 into a digital signal and stores the digital signal. The power supply is respectively connected to the processor component 400 and the detection component 300 to supply power to the processor component 400 and the detection component 300 .

The following describes the working process of the radioactive aerosol sampling device 1 according to the embodiment of the present invention with reference to FIGS. 1-4 . After the radioactive aerosol sampling device 1 is fixed on the aircraft, the airflow flows from the front end of the sampling tube 100 into the sampling chamber 110 during the flight of the aircraft, and when the airflow passes through the sampling assembly 200, the aerosol particles in the air are collected on the sampling assembly 200 At the same time, the temperature and humidity sensor 310 of the detection assembly 300 detects the temperature and humidity of the air passing through the sampling assembly 200, the air pressure sensor 320 detects the air pressure of the air passing through the sampling assembly 200, and the flow velocity sensor 330 detects the flow rate of the air passing through the sampling assembly 200 And the GPS antenna 340 detects the sampling time, the sampling latitude and longitude, and the sampling height, and the processor component 400 converts the analog signal detected by the detection component 300 into a digital signal and stores the digital signal. After the collection is completed, the volume of the sampled air can be calculated according to the stored digital signal. Specifically, the volume of the sampled air can be calculated according to the temperature and humidity of the air passing through the sampling assembly 200, the air pressure of the air passing through the sampling assembly 200, and the flow rate of the air passing through the sampling assembly 200, and then according to the volume of the sampled air and the sampling assembly The amount of aerosol collected on the 200 calculates the radioactivity concentration in the collection area. The sampling time, sampling latitude and longitude, and sampling height detected by the GPS antenna 340 are used for further analysis of the detection result data later.

The radioactive aerosol sampling device 1 according to the embodiment of the present invention can passively collect aerosol particles in the air by using the aerodynamic force generated when the aircraft is in flight by being fixed on the aircraft. In this way, the safety of the staff taking samples in the accident area can be guaranteed, especially the ground places where the staff should not be close to in the initial stage of the nuclear accident. It can avoid the injury to the staff in the high radioactivity occasion in the nuclear emergency. And the use of aircraft for sampling can not only greatly improve the sampling efficiency and greatly shorten the sampling time, but also have a wider sampling range.

In addition, the radioactive aerosol sampling device 1 not only does not need to be equipped with an air extractor, but also the processor assembly 400 is small in size and low in power, and only the power supply is needed to complete continuous sampling and data storage in the air for not less than 20 hours. This can get rid of the high-power power supply demand of the existing active radioactive aerosol sampling device, so that the sampling location is not limited.

In addition, the sampling cavity 110 of the sampling tube 100 is positioned along the front-to-back direction, so that the sampling cavity 110 can be aligned with the flow direction of the airflow, thereby increasing the collection amount of the radioactive aerosol sampling device 1 . Moreover, the sampling tube 100 is a straight tube structure without corners, thereby reducing the loss of aerosol, thereby further increasing the collection amount of the radioactive aerosol sampling device 1 to realize low activity level detection. The radioactive aerosol sampling device 1 can detect the time of sampling, the latitude and longitude of sampling and the height of sampling by setting the GPS antenna 340, that is, the parameters of the sampling environment can be detected in real time, so that the data collection of the radioactive aerosol sampling device 1 can be made more comprehensive. In this way, data support can be provided for the radioactive analysis of subsequent samples.

Therefore, the radioactive aerosol sampling device 1 according to the embodiment of the present invention has the advantages of small size, short sampling time, wide sampling area, unlimited sampling location, large collection amount, comprehensive data collection, and can improve the safety of workers in the accident area Etc.

Fig. 1, Fig. 2 and Fig. 4 show a radioactive aerosol sampling device 1 according to a specific embodiment of the present invention. As shown in FIGS. 1-4 , the sampling tube 100 may include a first sampling sub-tube 120 and a second sampling sub-tube 130 . The first sampling sub-pipe 120 may have a first sampling sub-cavity passing through the first sampling sub-pipe 120 along the front-rear direction. The second sampling sub-pipe 130 may have a second sampling sub-cavity passing through the second sampling sub-pipe 130 along the front-to-back direction, the front end of the second sampling sub-pipe 130 may be connected to the rear end of the first sampling sub-pipe 120 and the first sampling sub-pipe 120 The second sampling sub-cavity may communicate with the first sampling sub-cavity, that is, the second sampling sub-cavity and the first sampling sub-cavity may together form a sampling chamber 110 . When the aircraft is flying, the air flow first passes through the first sampling sub-cavity, and then flows out from the second sampling sub-cavity. The sampling assembly 200 may be arranged between the first sampling sub-pipe 120 and the second sampling sub-pipe 130 . In this way, after the sampling is completed, the sampling assembly 200 can be taken out by disassembling the first sampling sub-tube 120 and the second sampling sub-tube 130 , so that sampling from the sampling assembly 200 can be performed more conveniently.

Specifically, the cross-section of the first collection sub-cavity can be circular and the diameter of the cross-section of the first collection sub-cavity can be 196 mm, which can further increase the amount of aerosol collection, thereby improving The detection limit of collected samples is used for daily atmospheric environment monitoring with low radioactivity concentration. The length of the first collection sub-cavity can be 300 mm, so that not only can a stable air flow entity be formed in the first collection sub-cavity to provide pressure for the sampling assembly 200 to sample, but also the impact of side air flow on the first collection sub-cavity can be reduced. One collects the effect of sub-cavity pressure.

The cross-section of the second collection sub-cavity may be circular, the diameter of the cross-section of the second collection sub-cavity may be 196 mm, and the length of the second collection sub-cavity may be 450 mm. This not only facilitates the installation of the processor assembly 400, makes the airflow passing through the sampling assembly 200 have a stable velocity field, but also makes the center of gravity of the radioactive aerosol sampling device 1 eccentric to improve the stability of the structure of the radioactive aerosol sampling device 1 sex.

Advantageously, the sampling tube 100 can be made of polyvinyl chloride, and the inner surface of the sampling tube 100 can be polished. That is, the first sampling sub-pipe 120 and the second sampling sub-pipe 130 can be made of polyvinyl chloride, and the walls of the first sampling sub-cavity and the second sampling sub-cavity can be polished. Therefore, not only can the weight of the sampling tube 100 be reduced while ensuring the rigidity of the sampling tube 100 is sufficient, but also the air resistance can be reduced to facilitate the aerosol particles to adhere to the sampling assembly 200 .

Optionally, as shown in Figures 1 and 2, the first sampling sub-pipe 120 and the second sampling sub-pipe 130 can be connected through the front flange 500 and the rear flange 600, and the sampling assembly 200 can be located between the front flange 500 and the rear flange 600. Between flange 600. Specifically, the front flange 500 and the rear flange 600 may be connected by four bolts. In this way, not only the first sampling sub-tube 120 and the second sampling sub-tube 130 can be firmly and detachably connected, but also the sampling assembly 200 can be fixed on the sampling tube 100 more conveniently.

Fig. 1, Fig. 2 and Fig. 4 show a radioactive aerosol sampling device 1 according to one embodiment of the present invention. As shown in FIG. 1 , FIG. 2 and FIG. 4 , the sampling tube 100 may be provided with a fixed frame 700 , and the processor assembly 400 and the power supply may be provided on the fixed frame 700 . Therefore, the processor assembly 400 and the power supply can be installed on the sampling tube 100 more conveniently, and the stability of the processor assembly 400 and the power supply on the sampling tube 100 can be improved.

Optionally, as shown in FIGS. 1 and 2 , the fixed frame 700 may include a front bracket 710 arranged at the front end of the second sampling sub-tube 130, a rear bracket 720 arranged at the rear end of the second sampling sub-tube 130, and a The horizontal support 730 connecting the front support 710 and the rear support 720 , the processor assembly 400 and the power supply can be installed on the horizontal support 730 . In other words, the front end of the horizontal support 730 can be connected with the front support 710 and the rear end of the horizontal support 730 can be connected with the rear support 720, and the front support 710, the horizontal support 730 and the rear support 720 can be connected by 4 threaded rods. Therefore, the stability of the processor assembly 400 and the power supply on the sampling tube 100 can be further improved, and the fixing frame 700 is simple in structure, easy to manufacture, and convenient to install and disassemble.

Advantageously, as shown in FIG. 1 , FIG. 2 and FIG. 4 , a protective box 731 may be provided on the horizontal support 730 , and the processor assembly 400 and the power supply may be provided in the protective box 731 . There may be multiple protective boxes 731 , and the multiple protective boxes 731 may be respectively covered on various parts of the processor assembly 400 to match the structure of the processor assembly 400 . In this way, not only the processor assembly 400 can be protected by the protective box 731 to prevent the processor assembly 400 from being damaged, but also the appearance of the radioactive aerosol sampling device 1 can be more orderly and beautiful.

Fig. 2 shows a radioactive aerosol sampling device 1 according to a specific example of the present invention. As shown in FIG. 2 , the sampling assembly 200 may include a holder 210 and a filter 220 . The bracket 210 may be arranged between the first sampling sub-pipe 120 and the second sampling sub-pipe 130 . The filter element 220 can be arranged on the bracket 210 and the filter element 220 can be located between the first sampling sub-pipe 120 and the second sampling sub-pipe 130 for collecting aerosol particles in the passing air. Specifically, the bracket 210 and the filter element 220 can be clamped between the front flange 500 and the rear flange 600, and the filter element 220 can be tightened and fixed on the first sampling sub-pipe 120 to ensure the smoothness of the filter element 220. . By providing the bracket 210 , the filter element 220 can be supported by the bracket 210 to prevent the filter element 220 from being damaged by the impact of the airflow.

Specifically, the bracket 210 may be a wire mesh, and the filter element 220 may be a filter membrane. More specifically, the bracket 210 may be a steel wire mesh, and the filter element 220 may be a circular microporous glass fiber filter membrane with a diameter of 200 mm. In this way, not only can the holder 210 prevent the flow of airflow in the sampling cavity 110 from being obstructed, but also the collection volume of the radioactive aerosol sampling device 1 can be further increased.

Optionally, as shown in FIG. 2 , the sampling assembly 200 may also include an airflow conditioning member 230, which may have an airflow cavity passing through the airflow conditioning component 230 in the front-to-back direction, and the cross-sectional area of the airflow cavity may be The flow direction of the gas in the air flow chamber decreases, that is, the cross-sectional area of the rear end of the air flow chamber may be smaller than the cross-sectional area of the front end in the air flow chamber. The front end of the airflow conditioning part 230 can be connected to the rear surface of the support 210 and the rear end of the airflow conditioning part 230 can extend into the second sampling sub-cavity, the temperature and humidity sensor 310, the air pressure sensor 320 and the flow rate sensor 330 can be located at On the airflow conditioning part 230 and the flow velocity sensor 330 may be located at the air outlet of the airflow cavity (ie the rear end of the airflow conditioning part 230 ). Since the flow velocity of the airflow passing through the filter element 220 will be significantly reduced, by setting the airflow conditioning element 230, not only can a stable wind velocity field be formed at the rear end of the airflow cavity, but also the flow velocity of the airflow passing through the filter element 220 can be increased, thereby The flow velocity of the airflow passing through the filter element 220 may be within the optimum detection range of the flow velocity sensor 330 to improve the accuracy of the detection result of the flow velocity sensor 330 .

Specifically, the length of the airflow conditioning part 230 in the front-rear direction may be 160 mm, wherein the length of the straight part of the rear part of the airflow conditioning part 230 in the front-back direction may be 100 mm. The diameter of the cross section of the front end of the air flow cavity can be 196 millimeters, the diameter of the cross section of the rear end of the air flow cavity can be 40 mm, the area of the cross section of the front end of the air flow cavity is the same as the cross section of the rear end of the air flow cavity The area ratio can be 24:1. Since the flow velocity of the airflow is inversely proportional to the cross-sectional area of the airflow chamber, the ratio of the flow velocity of the airflow at the front end of the airflow chamber to the flow velocity of the airflow at the rear end of the airflow chamber is 40 ² :196 ² , that is, 1:24 .

Advantageously, as shown in Figure 2, a front gasket 240 may be provided between the first sampling sub-pipe 120 and the filter element 220, that is, a front gasket 240 may be provided between the front flange 500 and the filter element 220, and the filter element 220 and the filter element 220 may be provided with a front gasket 240. A middle gasket 250 may be provided between the brackets 210 , and a rear gasket 260 may be provided between the bracket 210 and the airflow adjustment member 230 . The front gasket 240 can ensure that the front flange 500 presses the filter element 220 tightly, and can prevent the filter element 220 from being squeezed by the front flange 500 and being damaged. The middle gasket 250 can ensure that the bracket 210 presses the filter element 220 tightly, and can prevent the filter element 220 from being damaged due to being pressed tightly by the bracket 210 . The rear gasket 260 can make the support 210 tightly connected with the air conditioning member 230 . That is to say, by setting the front gasket 240, the middle gasket 250 and the rear gasket 260, not only the structure of the sampling assembly 200 can be made more stable, the filter element 220 can be protected from damage, but also the first sampling sub-tube 120 and the second sampling sub-tube 120 can be sealed. The gap between the sub-tubes 130 is used to improve the airtightness of the radioactive aerosol sampling device 1 .

Fig. 3 shows a radioactive aerosol sampling device 1 according to one embodiment of the present invention. As shown in Figure 3, the processor assembly 400 may include a GPS conversion module 410 connected to the GPS antenna 340, a temperature and humidity conversion module 420 connected to the temperature and humidity sensor 310, an air pressure conversion module 430 connected to the air pressure sensor 320, and a flow rate sensor 330 connected to the flow rate conversion module 440, the storage module 450, and the processor 460 connected to the GPS conversion module 410, the temperature and humidity conversion module 420, the air pressure conversion module 430, the flow rate conversion module 440, and the storage module 450 respectively. The GPS conversion module 410 can convert the analog signal of the GPS antenna 340 into a digital signal and transmit it to the processor 460. The temperature and humidity conversion module 420 can convert the analog signal of the temperature and humidity sensor 310 into a digital signal and transmit it to the processor 460. The module 430 can convert the analog signal of the air pressure sensor 320 into a digital signal and transmit it to the processor 460. The flow rate conversion module 440 can convert the analog signal of the flow rate sensor 330 into a digital signal and transmit it to the processor 460. The digital signals transmitted by the conversion module 410 , the temperature and humidity conversion module 420 , the air pressure conversion module 430 and the flow rate conversion module 440 are stored in the storage module 450 . The processor component 400 has the advantages of comprehensive performance, simple structure, and low power.

There can be two protective boxes 731 , and the two protective boxes 731 can be arranged on the horizontal support 730 at intervals along the front and rear directions, and the smaller protective box 731 located in the front can be separately set on the flow rate conversion module 440 .

Advantageously, as shown in FIG. 3 , the processor component 400 can also include a wireless communication module 470 , and the wireless communication module 470 can be connected to the processor 460 so that the processor 460 can transmit the digital signal to the computer 2 through the wireless communication module 470 . Therefore, the detection result of the detection component 300 can be transmitted to the ground in real time, so as to provide timely data support for emergency decision-making.

Fig. 4 shows a radioactive aerosol sampling device 1 according to a specific embodiment of the present invention. As shown in FIG. 4 , the radioactive aerosol sampling device 1 may further include a mounting frame suitable for being installed on the aircraft, and the sampling tube 100 may be provided on the mounting frame. By providing the installation bracket, it is more convenient to install the entire radioactive aerosol sampling device 1 on the suspension system at the bottom of the aircraft. That is to say, there is no need to make structural changes to the aircraft, thereby reducing costs and improving the safety of the aircraft.

Specifically, as shown in FIG. 4 , the mounting frame may include a bottom plate 810, a plurality of mounting frames 820 arranged on the bottom plate 810 at intervals along the front-rear direction, a top beam 830 connected to the plurality of mounting frames 820, and The aircraft connecting piece 840 that is arranged on the top beam 830 and is suitable for being connected with the aircraft, the installation space can be defined between the bottom plate 810, a plurality of installation frames 820 and the top beam 830, the sampling tube 100, the sampling assembly 200, the detection assembly 300, the processor assembly 400 and the power supply may be installed on the bottom plate 810 and may be located in the installation space. The bottom plate 810 can be welded by a plurality of bars crosswise and vertically. There can be a plurality of aircraft connectors 840 and the plurality of aircraft connectors 840 can be connected with the suspension system at the bottom of the aircraft. Therefore, the stability of the sampling tube 100, the sampling assembly 200, the detection assembly 300, the processor assembly 400 and the power supply on the installation frame can be improved, and the structure of the installation frame is stable and easy to manufacture.

Wherein the sampling tube 100, the sampling assembly 200, the detection assembly 300, the processor assembly 400, and the power supply can be in multiple groups to increase the amount of aerosol collection, and the top beam 830 can be in multiple groups to ensure the structure of the mounting frame. stability.

Advantageously, the installation frame may further include a sampling tube fixing piece 850 , and the sampling tube 100 may be installed on the bottom plate 810 through the sampling tube fixing piece 850 . Specifically, there can be four sampling tube fixing pieces 850 , the front bracket 710 can be installed on the bottom plate 810 through two sampling tube fixing pieces 850 , and the rear bracket 720 can be installed on the bottom plate 810 through two sampling tube fixing pieces 850 . Therefore, the stability of the sampling tube 100 , the sampling assembly 200 , the detection assembly 300 , the processor assembly 400 and the power supply on the installation frame can be further improved.

More advantageously, the sampling tube fixture 850 can be welded on the bottom plate 810 and the front bracket 710 and the rear bracket 720 can be connected to the sampling tube fixture 850 by bolts respectively, so that the stability and firmness of the radioactive aerosol sampling device 1 can be ensured. At the same time, the disassembly of the radioactive aerosol sampling device 1 is more convenient.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (16)

1. a radioaerosol sampling apparatus, is characterized in that, described radioaerosol sampling apparatus is suitable for fixing on board the aircraft, and described radioaerosol sampling apparatus comprises:

Sampling pipe, has the sampling cavity of through described sampling pipe along the longitudinal direction in described sampling pipe, described sampling pipe is straight tube, and one end of described sampling cavity forms air intake opening, and the area of described air intake opening is consistent with the cross-sectional area size of described sampling cavity;

Sampling component, described sampling component is located on described sampling pipe for gathering the gasoloid in the gas flowing through described sampling cavity;

Detection components, described detection components comprise be located on described sampling component for detect the temperature and humidity of the gas through described sampling component Temperature Humidity Sensor, for detect the pressure of the gas through described sampling component baroceptor, for detecting the flow sensor of the flow velocity of the gas through described sampling component and being located on described sampling pipe for detecting sampling time, sampling longitude and latitude and the gps antenna of height of sampling;

Processor module, described processor module is located on described sampling pipe, and described processor module is connected with described detection components so that the simulating signal of described detection components is converted to digital signal and described digital signal is stored by described processor module; With

Charger, described charger is connected to power to described processor module and described detection components with described processor module respectively with described detection components.

2. radioaerosol sampling apparatus according to claim 1, is characterized in that, described sampling pipe comprises:

First sampling pipe, has the first sub-chamber of sampling of the sub-pipe of through described first sampling along the longitudinal direction in the sub-pipe of described first sampling; With

Second sampling pipe, there is in the sub-pipe of described second sampling the second sub-chamber of sampling of the sub-pipe of through described second sampling along the longitudinal direction, the front end of the sub-pipe of described second sampling is connected with the described first rear end of sample sub-pipe and the described second sub-chamber of sampling, sub-chamber and described first of sample is communicated with, and wherein said sampling component is located at the described first sub pipe of sampling and samples between sub-pipe with described second.

3. radioaerosol sampling apparatus according to claim 1, is characterized in that, described sampling pipe is made up of Polyvinylchloride, and the inside surface of described sampling pipe is polished surface.

4. radioaerosol sampling apparatus according to claim 2, is characterized in that, described first sampling pipe is connected with rear flange by forward flange with the sub-pipe of described second sampling, and described sampling component is between described forward flange and described rear flange.

5. radioaerosol sampling apparatus according to claim 2, is characterized in that, described sampling pipe is provided with fixed mount, and described processor module and described charger are located on described fixed mount.

6. radioaerosol sampling apparatus according to claim 5, it is characterized in that, described fixed mount comprises the fore-stock of the front end being located at the sub-pipe of described second sampling, the after-poppet being located at the rear end of the sub-pipe of described second sampling and the horizontal stand be connected with described after-poppet with described fore-stock respectively, and described processor module and described charger are arranged on described horizontal stand.

7. radioaerosol sampling apparatus according to claim 6, is characterized in that, described horizontal stand is provided with protection box, and described processor module and described charger are located in described protection box.

8. radioaerosol sampling apparatus according to claim 2, is characterized in that, described sampling component comprises:

Support, described is erected between described first sampling pipe and the sub-pipe of described second sampling; With

Filtration members, described filtration members is established on the bracket and is sampled between sub-pipe at described first sampling pipe and described second.

9. radioaerosol sampling apparatus according to claim 8, is characterized in that, described support is silk screen, and described filtration members is filtering membrane.

10. radioaerosol sampling apparatus according to claim 9, it is characterized in that, described sampling component also comprises air-flow conditioning part, there is in described air-flow conditioning part the air flow chamber of through described air-flow conditioning part along the longitudinal direction, the area of the xsect of described air flow chamber reduces along the flow direction of the gas in described air flow chamber, the front end of described air-flow conditioning part is connected with the rear surface of described support and rear end is stretched into described second and to be sampled sub-chamber, described Temperature Humidity Sensor, described baroceptor and described flow sensor are located on described air-flow conditioning part and described flow sensor is positioned at the gas outlet place of described air flow chamber.

11. radioaerosol sampling apparatuses according to claim 10, it is characterized in that, be provided with front packing ring between described first sampling pipe and described filtration members, be provided with middle washer between described filtration members and described support, described support and described air-flow are nursed one's health between part and are provided with rear packing ring.

12. radioaerosol sampling apparatuses according to claim 1, it is characterized in that, the processor that described processor module comprises the GPS modular converter be connected with described gps antenna, the humiture modular converter be connected with described Temperature Humidity Sensor, the air pressure modular converter be connected with described baroceptor, the flow velocity modular converter be connected with described flow sensor, storage module and is connected with described storage module with described GPS modular converter, described humiture modular converter, described air pressure modular converter, described flow velocity modular converter respectively.

13. radioaerosol sampling apparatuses according to claim 12, it is characterized in that, described processor module also comprises wireless communication module, described wireless communication module be connected with described processor in case described processor by described wireless communication module by described digital data transmission to computing machine.

14. radioaerosol sampling apparatuses according to claim 1, is characterized in that, also comprise and be suitable for being arranged on described carry-on erecting frame, described sampling pipe is located on described erecting frame.

15. radioaerosol sampling apparatuses according to claim 14, it is characterized in that, described erecting frame comprises base plate, be located at the multiple installing frames on described base plate along the longitudinal direction at interval, the back timber be connected with multiple described installing frame respectively with to be located on described back timber and to be suitable for the aircraft web member that is connected with described aircraft, described base plate, installing space is limited between multiple described installing frame and described back timber, described sampling pipe, described sampling component, described detection components, described processor module and described charger to be arranged on described base plate and to be positioned at described installing space.

16. radioaerosol sampling apparatuses according to claim 15, it is characterized in that, described erecting frame also comprises sampling pipe fixture, and described sampling pipe is arranged on described base plate by described sampling pipe fixture.