A device for detecting radioactivity in building materials and a method of using the same

Abstract

This invention provides a radioactive detection device for building materials and its usage method, relating to the field of building material detection technology. The device includes a rotating drum with several suction heads and a heating mechanism for heating the air drawn in. A driving mechanism is mounted on the heating mechanism, comprising a driving housing connected to the heating mechanism. An air supply pipe is mounted on the driving housing, with its other end connected to a compression mechanism. A detection mechanism is mounted on the compression mechanism. This invention, through the rotating drum and its suction heads, can cyclically extract air from different locations within a room, not just within a single plane, but from multiple angles and directions. The detection mechanism then performs radioactive material detection on the environment surrounding the building materials to be tested, resulting in better detection effects and higher accuracy of the measured values.

Description

Technical Field

[0001] This invention relates to the field of building material testing technology, specifically to a radioactivity testing device for building materials and its usage method. Background Technology

[0002] As people's awareness of environmental quality continues to improve, the issue of radioactivity in building materials has attracted the attention and concern of radiation medicine experts and environmental protection experts worldwide. Building materials contain certain natural radioactive nuclides such as Ra, Th, and K. When radioactive substances exceed certain limits, serious consequences can occur, causing significant impact and harm to human health.

[0003] Currently, commonly used building materials on the market inherently contain certain radioactive elements. Moreover, the devices currently available for detecting the radioactivity of building materials typically only test the building materials themselves and do not detect radioactive substances in the air. Furthermore, the radioactivity of building materials is relatively weak, and the radioactive elements they emit are even weaker. Therefore, general equipment cannot detect radioactive substances in the air.

[0004] Furthermore, CN 114397689 A discloses "a radioactive detection device for building materials and its method of use, including a driving device, a gas collecting device, a compression device, a radioactive detection device, an energy storage device, and a base. The energy storage device includes a compressed air tank, a pull rope, an air-inflating piston, an air-inflating piston sleeve, and a door. The air-inflating piston is slidably disposed inside the air-inflating piston sleeve, which is disposed on the base. The air-inflating piston sleeve is provided with a piston air inlet and a piston air outlet. The compressed air tank is connected to the piston air outlet through an air pipe. The door is connected to the air-inflating piston through a pull rope. When the door is opened, the air-inflating piston can be pulled to slide, allowing air from inside the air-inflating piston sleeve to enter the compressed air tank."

[0005] However, the aforementioned device draws in air through air intake devices at different locations during use. However, as... Figure 1 As shown, in this patent, the air intake device is set on a vertical plane, that is, it collects air from different positions on the vertical plane. Its collection range is relatively small, which leads to relatively poor detection accuracy.

[0006] Furthermore, the aforementioned device is used to detect the content of radioactive particles in the air at the current time. Although the decay of radioactive elements does not change with temperature, the movement speed of radioactive particles does change with temperature. Therefore, the aforementioned device can only detect the content of radioactive particles at the current temperature, and the detection results are relatively one-sided. At lower temperatures, the movement speed of radioactive particles may be slower, resulting in uneven distribution of particles left on the filter paper, which may lead to larger errors in the detection results. Summary of the Invention

[0007] The present invention provides a radioactivity detection device for building materials and a method for using the same, in order to solve at least one of the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the present invention discloses a radioactive detection device for building materials, including a rotating drum with a plurality of suction heads and a heating mechanism installed on the drum. The heating mechanism is used to heat the air sucked into the rotating drum. A driving mechanism is installed on the heating mechanism, which includes a driving housing that is connected to the heating mechanism. An air supply pipe is installed on the driving housing, and the other end of the air supply pipe is connected to a squeezing mechanism. A detection mechanism is installed on the squeezing mechanism.

[0009] Preferably, two stabilizing rings are provided on the circumference of the rotating drum, one on the left and one on the right. The rotating drum is rotatably connected to the stabilizing rings, and a stabilizing base is fixedly provided at the lower end of the stabilizing rings.

[0010] Preferably, a stabilizing column is fixedly installed on the stabilizing ring on the right side. The driving mechanism includes a power source, which is fixedly installed on the stabilizing column. A rotating part is fixedly connected to the left output end of the power source. The rotating part rotates through the stabilizing column and the driving housing. A driving pulley is installed on the rotating part. A driven pulley is installed around the drum. A synchronous belt is installed on the driving pulley and the driven pulley. A blade is installed inside the driving housing.

[0011] Preferably, the heating mechanism includes a tank, a metal rod, an annular cavity, and a heating wire. The metal rod is vertically arranged inside the tank, and a connecting rod is fixedly arranged on the metal rod. The connecting rod is fixedly connected to the inner wall of the tank. The annular cavity is also provided on the tank, and the heating wire is wound inside the annular cavity. The heating wire extends into the tank through the annular cavity and is wound on the metal rod. An electrical connector is also provided on the heating wire.

[0012] Preferably, the extrusion mechanism includes an extrusion chamber, an exhaust chamber, and an annular exhaust pipe, with the exhaust chamber being connected to the annular exhaust pipe.

[0013] Preferably, a second stabilizing column is fixedly installed on the left stabilizing ring, and a connecting column is fixedly connected to the left side of the second stabilizing column. The other end of the connecting column is fixedly connected to the air outlet box; the other end of the air supply pipe is connected through the air outlet box.

[0014] Preferably, the detection mechanism includes a gamma scintillation radiation detector and a detection plate, and the detection plate is also provided with detection filter paper.

[0015] Preferably, a vertical rod is provided on the front side of the extrusion chamber, which is used to push the test plate to move.

[0016] Preferably, an L-shaped connecting block is provided on the stable base, and the L-shaped connecting block is used to connect the detection mechanism.

[0017] Preferably, a method for using a building material radioactivity detection device, comprising the following steps:

[0018] S1: Start the drive mechanism, which causes the drum to rotate while drawing in air;

[0019] S2: The air is heated by the heating mechanism, and then the heated air is fed into the extrusion mechanism through the air supply pipe;

[0020] S3: The extrusion mechanism forces heated air onto the detection mechanism, which then performs radioactivity detection on the air.

[0021] Compared with existing technologies, this invention provides a radioactive detection device for building materials and its usage method. This invention uses a rotating drum and several suction heads on the drum to cyclically extract air from different locations indoors, not just within a single plane, but from multiple angles and directions. Then, through a detection mechanism, it detects radioactive substances in the environment of the building materials to be tested, resulting in better detection effects and higher accuracy. Furthermore, a heating mechanism is included to heat the air drawn in by the rotating drum, simulating the temperature of summer or heating seasons. The increased temperature accelerates the movement of radioactive particles, leading to more comprehensive and accurate detection results. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the existing technology;

[0024] Figure 2 This is a schematic diagram of the structure of the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of the rotating drum of the present invention;

[0026] Figure 4 This is a schematic diagram of the heating mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the extrusion mechanism and the detection mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the detection plate of the present invention.

[0029] In the diagram: 1. Stabilizing base; 2. Stabilizing ring; 3. Heating mechanism; 4. Stabilizing column one; 5. Power source; 6. Rotating part; 7. Drive pulley; 8. Blade; 9. Drive housing; 10. Stabilizing column two; 11. Connecting column; 12. Extrusion housing; 13. Gas delivery pipe; 14. Gas outlet housing; 15. Annular gas outlet pipe; 16. Detection block; 17. L-shaped mounting plate; 18. L-shaped connecting block; 19. Suction head; 20. Rotary drum; 21. Annular cavity 21. Box; 22. Driven pulley; 23. Synchronous belt; 24. Air hole; 25. Electrical connector; 26. Heating wire; 27. Annular cavity; 28. Metal rod; 29. ​​Cam; 30. Extrusion section one; 31. Extrusion section two; 32. Spring; 33. Gamma scintillation radiation detector; 34. Trapezoidal block; 35. Round hole; 36. Detection plate; 37. Vertical rod; 38. Limiting rod; 39. Extrusion rod; 40. Square hole; 41. Tank body; 42. Push rod. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example 1

[0034] Embodiments of the present invention provide a radioactivity detection device for building materials, such as... Figure 1-5 As shown, the device includes a rotating drum 20, which is provided with several suction heads 19. A heating mechanism 3 is also installed on the rotating drum 20. The heating mechanism 3 is used to heat the air sucked into the rotating drum 20. A driving mechanism is installed on the heating mechanism 3. The driving mechanism includes a driving housing 9, which is connected to the heating mechanism 3. An air supply pipe 13 is installed on the driving housing 9. The other end of the air supply pipe 13 is connected to a compression mechanism. A detection mechanism is provided on the compression mechanism.

[0035] The working principle and beneficial effects of the above technical solution are as follows: The drive mechanism is activated, causing the rotating drum 20 to rotate while simultaneously drawing in air through several suction heads 19. The air is heated by the heating mechanism 3 and then enters the extrusion mechanism through the air supply pipe 13. The extrusion mechanism forces the air onto the detection mechanism, which then detects radioactive substances in the environment surrounding the building materials to be tested. This invention, through the rotating drum 20 and the several suction heads 19 on it, can cyclically extract air from different locations indoors, not just limited to a single plane, but extracting from multiple angles and directions. The detection mechanism then detects radioactive substances in the air, resulting in better detection effects and higher accuracy. Furthermore, the heating mechanism 3 heats the air drawn in by the rotating drum, simulating the temperature during summer or heating season. The increased temperature accelerates the movement of particles carrying radioactive substances, leading to more comprehensive and accurate detection results. (For specific detection principles, please refer to CN 114397689A, CN 116067721A, etc.)

[0036] Example 2

[0037] Based on the above embodiment 1, as follows Figure 1-2 As shown, two stabilizing rings 2 are arranged on the left and right sides of the rotating cylinder 20. The rotating cylinder 20 is rotatably connected to the stabilizing rings 2, and a stabilizing base 1 is fixedly installed at the lower end of the stabilizing rings 2.

[0038] Preferably, a stabilizing column 4 is fixedly installed on the stabilizing ring 2 on the right side. The driving mechanism includes a power source 5, which is fixedly installed on the stabilizing column 4. A rotating part 6 is fixedly connected to the left output end of the power source 5. The rotating part 6 rotates through the stabilizing column 4 and the driving housing 9. A driving pulley 7 is provided on the rotating part 6. A driven pulley 22 is provided on the circumference of the rotating drum 20. A synchronous belt 23 is provided on the driving pulley 7 and the driven pulley 22. A blade 8 is provided inside the driving housing 9.

[0039] The working principle and beneficial effects of the above technical solution are as follows: Power source 5 is activated, driving the rotating part 6 to rotate. The rotating part 6 drives the drive pulley 7 to rotate, which in turn drives the driven pulley 22 to rotate via the synchronous belt 23. The driven pulley 22 then drives the rotating drum 20 to rotate. While the rotating part 6 is rotating, it drives the blades 8 to rotate. The rotation of the blades 8 causes air to enter the extrusion mechanism through the rotating drum 20, the drive housing 9, and the air supply pipe 13. The blades 8 allow air to flow, and the drive pulley 7, synchronous belt 23, and driven pulley 22 allow the rotating part 6 to rotate while simultaneously driving the rotating drum 20 to rotate. In other words, by using a single power source 5, both air intake and rotation of the rotating drum 20 can be achieved, resulting in enhanced functionality and better practicality.

[0040] Example 3

[0041] Based on the above embodiments 1-2, such as Figure 3 As shown, the heating mechanism 3 includes a tank 41, a metal rod 28, an annular cavity 27, and a heating wire 26. The metal rod 28 is vertically arranged inside the tank 41, and a connecting rod is fixedly arranged on the metal rod 28. The connecting rod is fixedly connected to the inner wall of the tank 41. The annular cavity 27 is also provided on the tank 41. The heating wire 26 is wound inside the annular cavity 27. The heating wire 26 extends into the tank 41 through the annular cavity 27. The heating wire 26 is wound on the metal rod 28, and an electrical connector 25 is also provided on the heating wire 26.

[0042] Among them, an annular empty box 21 is connected through the lower side of the tank body 41. An arc-shaped ventilation groove is provided at the end of the annular empty box 21 away from the tank body 41. Several air holes 24 are provided around the rotating cylinder 20, and the air holes 24 correspond to the arc-shaped ventilation groove.

[0043] The working principle and beneficial effects of the above technical solution are as follows: While the power source 5 is working, the electrical connector 25 is connected to the circuit in the workshop / room. At this time, the heating wire 26 starts to heat up, and the heating wire 26 will cause the metal rod 28 to heat up. Since the metal rod 28 is metal, the heating temperature of the metal rod 28 will be higher. When air enters the tank 41 through several air holes 24 and the annular empty box 21, the heating speed will be faster. By setting the heating wire 26 and the metal rod 28, the air can be heated. The increase in temperature will make the movement of particles carrying radioactive materials faster and the dispersion rate of particles in the air faster, thereby making the detection results more comprehensive and the detection accuracy higher.

[0044] Example 4

[0045] Based on the above embodiments 1-3, such as Figure 1 , 4 As shown, the extrusion mechanism includes an extrusion box 12, an exhaust box 14, an annular exhaust pipe 15, an extrusion section 30, an extrusion rod 39, an extrusion section 31, and a spring 32. A rotating part 6 extends rotatably into the extrusion box 12. A cam 29 is fixedly connected to the left end of the rotating part 6. An extrusion section 30 is slidably disposed inside the extrusion box 12 and abuts against the cam 29. An exhaust box 14 is fixedly installed on the lower side of the extrusion box 12. An extrusion rod 39 is fixedly connected to the lower side of the extrusion section 30 and slides downward into the exhaust box 14. An exhaust section 31 is fixedly connected to the lower side of the extrusion rod 39 and slides slidably with the exhaust box 14. A spring 32 is disposed on the lower side of the exhaust section 31 and is fixedly connected to the lower side wall of the exhaust box 14. An annular exhaust pipe 15 is connected through the lower side of the exhaust box 14.

[0046] Preferably, a second stabilizing column 10 is fixedly installed on the left stabilizing ring 2, and a connecting column 11 is fixedly connected to the left side of the second stabilizing column 10. The other end of the connecting column 11 is fixedly connected to the air outlet box 14; the other end of the air supply pipe 13 is connected through to the air outlet box 14.

[0047] The working principle and beneficial effects of the above technical solution are as follows: When the power source 5 starts to rotate, the power source 5 will drive the rotating part 6 to rotate, the rotating part 6 will drive the cam 29 to rotate, the cam 29 will drive the extrusion part 30 to move downward, the extrusion part 30 will drive the extrusion rod 39 to move downward together, the extrusion rod 39 will drive the extrusion part 31 to move downward, the extrusion part 31 will push the gas input into the air outlet box 14 from the air supply pipe 13 out through the annular air outlet pipe 15, and when the extrusion part 31 is pressed down to the limit position, the spring 32 will reset, so that the extrusion part 31 moves up and down continuously. As the extrusion part 31 moves up and down continuously, the annular air outlet pipe 15 will intermittently squeeze out the air; by setting the cam 29 and the spring 32, the extrusion part 31 can move up and down continuously, so that the air is intermittently squeezed out onto the detection mechanism. The structure is simple, easy to use, and the air extrusion operation can be completed simply by starting the power source 5, which is highly practical.

[0048] Example 5

[0049] Based on the above embodiment 4, such as Figure 1 , 4 As shown in Figure -5, the detection mechanism includes a detection block 16, an L-shaped mounting plate 17, a trapezoidal block 34, a gamma scintillation radiation detector 33, and a detection plate 36. The L-shaped mounting plate 17 is provided on the front side of the detection block 16, and the trapezoidal block 34 is provided inside the L-shaped mounting plate 17. The trapezoidal block 34 is fixedly connected to the detection block 16. The gamma scintillation radiation detector 33 is also provided inside the L-shaped mounting plate 17. The detection plate 36 is installed on the detection block 16 and the L-shaped mounting plate 17. The detection plate 36 is provided with a number of square holes 40 and a number of round holes 35. The square holes 40 and round holes 35 are arranged alternately, and the round holes 35 are also provided with detection filter paper.

[0050] Preferably, a push rod 42 is fixedly provided on the front side of the extrusion section 30, and a through groove is provided on the front side of the extrusion box 12. The push rod 42 extends out of the extrusion box 12 from the through groove and is slidably connected to the through groove. A vertical rod 37 is rotatably provided on the push rod 42, and a torsion spring is provided at the rotatable position of the push rod 42 and the vertical rod 37. A limit rod 38 is also provided on the front side wall of the air outlet box 14, and the vertical rod 37 cooperates with the square hole 40.

[0051] Preferably, an L-shaped connecting block 18 is provided on the stable base 1, and the other end of the L-shaped connecting block 18 is connected to the detection block 16.

[0052] The working principle and beneficial effects of the above technical solution are as follows: When the extrusion part 30 moves downward under the action of the cam 29, the extrusion part 30 will drive the push rod 42 to move downward together. In the initial position, the limit rod 38 abuts against the vertical rod 37. When the push rod 42 descends, the push rod 42 will drive the vertical rod 37 to descend together. The vertical rod 37 will be inserted into one of the square holes 40. Then the vertical rod 37 will contact the trapezoidal block 34. Under the action of the trapezoidal block 34, the vertical rod 37 will become vertical, that is, the vertical rod 37 will push one of the square holes 40 to move forward, thereby driving the detection plate 36 to move forward as a whole. When the extrusion part 30 resets, the vertical rod 37 will also move away from the limit rod 38. The matching position of the square hole 40, that is, the detection plate 36 moves forward intermittently. When the detection plate 36 moves once, the round hole 35 on the detection plate 36 will be exactly above the gamma scintillation radiation detector 33. Then the gamma scintillation radiation detector 33 will detect the detection filter paper in the round hole 35 to obtain the content of radioactive substances in the air. That is, the particles carrying radioactive substances in the air are concentrated on the detection filter paper, making the detection results more accurate. Moreover, the structure is simple and easy to use. The entire device only needs to start the power source 5 to realize the effects of rotating the drum 20, sucking in air, supplying air, exhausting air, and driving the detection plate 36 to move. The fit between the various structures is high and the accuracy is strong.

[0053] Example 6

[0054] This embodiment provides a method for using a radioactivity detection device for building materials, comprising the following steps:

[0055] S1: Start the drive mechanism, which causes the rotating drum 20 to draw in air while rotating;

[0056] S2: The air is heated by the heating mechanism 3, and then the heated air is input into the extrusion mechanism through the air supply pipe 13;

[0057] S3: The extrusion mechanism forces heated air onto the detection mechanism, which then performs radioactivity detection on the air.

[0058] The working principle and beneficial effects of the above technical solution are as follows: First, the drive mechanism is started, which causes the rotating drum 20 to draw in air while rotating. Then, the air is heated by the heating mechanism 3. The heated air is then input into the extrusion mechanism through the air supply pipe 13. Finally, the extrusion mechanism squeezes the heated air onto the detection mechanism, which performs radioactivity detection on the air. The drive mechanism allows the rotating drum 20 to draw in air while rotating, resulting in a higher degree of coordination. Heating the air by the heating mechanism 3 allows the particles carrying radioactive elements to move faster, resulting in a more uniform distribution of the particles carrying radioactive elements. This effectively improves the detection accuracy of the device and enhances its functionality.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for detecting radioactivity in building materials, characterized in that, It includes a rotating drum (20), which is provided with several suction heads (19). A heating mechanism (3) is also installed on the rotating drum (20). The heating mechanism (3) is used to heat the air sucked into the rotating drum (20). A driving mechanism is installed on the heating mechanism (3). The driving mechanism includes a driving housing (9). The driving housing (9) is connected to the heating mechanism (3). An air supply pipe (13) is installed on the driving housing (9). The other end of the air supply pipe (13) is connected to a squeezing mechanism. A detection mechanism is provided on the squeezing mechanism.

2. The radioactivity detection device for building materials according to claim 1, characterized in that, Two stabilizing rings (2) are provided on the circumference of the rotating cylinder (20), and the rotating cylinder (20) is rotatably connected to the stabilizing rings (2). A stabilizing base (1) is fixedly provided at the lower end of the stabilizing rings (2).

3. The radioactivity detection device for building materials according to claim 1, characterized in that, A stabilizing column (4) is fixedly installed on the stabilizing ring (2) on the right side. The driving mechanism includes a power source (5). The power source (5) is fixedly installed on the stabilizing column (4). A rotating part (6) is fixedly connected to the left output end of the power source (5). The rotating part (6) rotates through the stabilizing column (4) and the drive housing (9). A driving pulley (7) is installed on the rotating part (6). A driven pulley (22) is installed around the drum (20). A synchronous belt (23) is installed on the driving pulley (7) and the driven pulley (22). A blade (8) is installed inside the drive housing (9).

4. The radioactivity detection device for building materials according to claim 3, characterized in that, The heating mechanism (3) includes a tank (41), a metal rod (28), an annular cavity (27), and a heating wire (26). The metal rod (28) is vertically arranged inside the tank (41). A connecting rod is fixedly arranged on the metal rod (28). The connecting rod is fixedly connected to the inner wall of the tank (41). The annular cavity (27) is also provided on the tank (41). The heating wire (26) is wound inside the annular cavity (27). The heating wire (26) passes through the annular cavity (27) and extends into the tank (41). The heating wire (26) is wound on the metal rod (28). An electrical connector (25) is also provided on the heating wire (26).

5. A radioactivity detection device for building materials according to claim 3, characterized in that, The extrusion mechanism includes an extrusion box (12), an exhaust box (14), and an annular exhaust pipe (15), with the exhaust box (14) being connected to the annular exhaust pipe (15).

6. The radioactivity detection device for building materials according to claim 5, characterized in that, A second stabilizing column (10) is fixedly installed on the left stabilizing ring (2). A connecting column (11) is fixedly connected to the left side of the second stabilizing column (10). The other end of the connecting column (11) is fixedly connected to the air outlet box (14). The other end of the air supply pipe (13) is connected through to the air outlet box (14).

7. A radioactivity detection device for building materials according to claim 5, characterized in that, The detection mechanism includes a gamma scintillation radiation detector (33) and a detection plate (36), on which a detection filter paper is also provided.

8. A radioactivity detection device for building materials according to claim 7, characterized in that, A vertical rod (37) is provided on the front side of the extrusion box (12), which is used to push the detection plate (36) to move.

9. A radioactivity detection device for building materials according to claim 8, characterized in that, An L-shaped connecting block (18) is provided on the stable base (1), and the L-shaped connecting block (18) is used to connect the detection mechanism.

10. A method of using a radioactivity detection device for building materials, for using the radioactivity detection device for building materials as described in any one of claims 1-9, characterized in that, Includes the following steps, S1: Start the drive mechanism, which causes the drum (20) to draw in air while rotating; S2: The air is heated by the heating mechanism (3), and then the heated air is fed into the extrusion mechanism through the air supply pipe (13); S3: The extrusion mechanism forces heated air onto the detection mechanism, which then performs radioactivity detection on the air.

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