A I-131 long-term continuous monitoring device and monitoring method thereof

Abstract

The present invention belongs to the field of element monitoring, and in particular to an I‑131 long-term continuous monitoring device. Aiming at the problem that the existing monitoring device cannot perform long-term continuous monitoring of the air and the filter paper tube is difficult to remove during use, the following scheme is proposed, which comprises a shell, and two fixed tubes are movably connected to the inner wall of one side of the shell. The present invention also proposes a monitoring method for the I‑131 long-term continuous monitoring device, comprising the following steps: S1: firstly, the filter paper tube is sleeved on the fixed tube close to the side of the intake pipe. The present invention can not only make the filter paper tube quickly and easily dismantle and install when pushing the sliding sleeve, thereby improving the convenience of product use and the efficiency of air detection, but also continuously calculate the concentration of I‑131 in the air through a gamma spectrum detector and an I‑131 concentration algorithm, thereby improving the continuity of measurement, and can also guide the filter paper to keep the filter paper horizontal, thereby improving the filtering effect of I‑131.

Description

Technical Field

[0001] The present invention relates to the technical field of element monitoring, and in particular to an I-131 long-term continuous monitoring device and a monitoring method thereof. Background Art

[0002] Iodine-131 is a radioactive isotope of elemental iodine. It is an artificial radionuclide (nuclear fission product) with the symbol I-131 and a half-life of 8.02 days. Under normal circumstances, it does not exist in nature. In addition to being used directly in the form of NaI solution for thyroid function tests and treatment of thyroid diseases, iodine-131 can also be used to label many compounds for in vivo or in vitro diagnosis of diseases.

[0003] When the content of iodine-131 in the air is high, it will cause harm to the human body. Therefore, it is necessary to place a monitoring device in a place where iodine-131 may exist to monitor the content of iodine-131 to prevent danger to the human body. However, the monitoring devices used on the market cannot perform long-term continuous monitoring of the air, and the filter paper tube is difficult to remove during use, which reduces the efficiency of air monitoring. Therefore, an I-131 long-term continuous monitoring device and a monitoring method thereof are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing technology that the monitoring devices used in the market cannot perform long-term continuous monitoring of the air, and the filter paper tube is difficult to remove during use, which reduces the efficiency of air monitoring, and to propose an I-131 long-term continuous monitoring device and a monitoring method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An I-131 long-term continuous monitoring device and a monitoring method thereof, comprising a shell, an inner wall of one side of the shell being movably connected to two fixed cylinders, an inner wall of one side of the shell being fixedly connected to an air collecting box and a flow controller, and the top of the air collecting box of the flow controller is connected, an air inlet end of the air collecting box is fixedly connected to an air inlet pipe, an air suction pump is fixedly connected to the bottom inner wall of the shell, and the air inlet end of the air suction pump is connected to the bottom of the air collecting box, an air outlet end of the air suction pump is fixedly connected to an air outlet pipe, and the air outlet pipe and the air inlet pipe both pass through the shell, an inner wall of one side of the air collecting box is fixedly connected to a gamma spectrum detector, the fixed cylinder comprising a rotating shaft, the rotating shaft is rotatably connected to an inner wall of one side of the shell, a first sliding frame and a second sliding frame are movably connected to the circumferential outer wall of the rotating shaft, and a spring is fixedly connected between the first sliding frame and the second sliding frame, The circumferential outer walls of the first sliding frame and the second sliding frame are respectively movably connected with a plurality of first push rods and a second push rod, and the first push rod and the second push rod are symmetrically installed, one end of the first push rod is movably connected to the top plate, and the second push rod is rotatably connected to the top plate, one end of the rotating shaft is movably connected with a sliding sleeve, one side of the sliding sleeve is fixedly connected with a plurality of connecting rods and a push rod, and the connecting rod is fixed to the second sliding frame. The circumferential outer wall of the rotating shaft is fixedly connected with a plurality of fixed frames, one end of the fixed frame is movably connected to a swing rod, one end of the swing rod is provided with a first sliding groove, the circumferential outer wall of the first sliding frame is provided with a plurality of second sliding grooves, the second sliding groove is movably connected with a limiting column, and the first sliding groove is slidably connected to the limiting column, one side outer wall of the shell is fixedly connected to a motor, and one end of the motor output shaft passes through the shell and is fixed to one of the rotating shafts.

[0007] As a further solution of the present invention, one side of the shell is movably connected to a door body, and one side of the door body is provided with a door lock.

[0008] As a further solution of the present invention, a mounting opening is provided on one side of the door body, and a viewing window is provided in the mounting opening.

[0009] As a further solution of the present invention, a control panel is fixedly connected to an outer wall of one side of the shell.

[0010] As a further solution of the present invention, two guide posts are movably connected to an inner wall of one side of the shell.

[0011] As a further solution of the present invention, a bracket is fixedly connected to an inner wall of one side of the shell, and the bracket passes through the air collecting box.

[0012] The present invention also provides a monitoring method of an I-131 long-term continuous monitoring device, comprising the following steps:

[0013] S1: First, put the filter paper cylinder on the fixed cylinder near the side of the air inlet pipe. When putting it on, press the sliding sleeve, and the sliding sleeve pushes the second sliding frame to slide through the connecting rod. The second sliding frame pulls the top plate to move toward the center point through the second push rod. When the sliding sleeve moves, the bottom of the swing rod is pushed to move through the push rod, so that the other end of the swing rod pushes the second sliding seat to move through the limit column, and the second sliding seat pulls the other end of the top plate to move toward the center point through the first push rod, so that the diameter of the fixed cylinder is reduced, which is convenient for the installation of the filter paper cylinder;

[0014] S2: After the filter paper cylinder is placed, the sliding sleeve is released, and the first sliding frame and the second sliding frame are reset under the action of the spring, thereby fixing the filter paper cylinder. Similarly, the paper collecting cylinder is installed on another fixed cylinder;

[0015] S3: Pass the filter paper on the filter paper cylinder through the bottom of the first guide column, then through the air collecting box, and then through the bottom of another guide column, and then fix one end of the filter paper on the paper collecting cylinder;

[0016] S4: Start the motor, flow controller and gamma spectrum detector through the control panel, and then start the suction pump. The motor drives the fixed cylinder on the side away from the flow controller to rotate to collect the used filter paper. At the same time, the suction pump draws the air controlled by the flow controller into the air collecting box through the air inlet pipe. At the same time, the air is filtered by the filter paper and discharged through the air outlet pipe. At the same time, I-131 is filtered out by the filter paper, and then the gamma spectrum detector is used to measure the radiation spectrum. Subsequently, the I-131 concentration algorithm is used to extract the I-131 full energy peak information obtained by sampling from the radiation spectrum, and the concentration of I-131 in the air is calculated in combination with the sampling and measurement time.

[0017] As a further solution of the present invention, the I-131 concentration algorithm is as follows:

[0018] Where 1.004×10 12 21.0022×10 5 , 1.1781, 1.1785×10 5 The error in actual computer use is within 5%.

[0019] As a further aspect of the present invention, the t d Time is less than 15min, t s Less than 15 minutes.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention can change the diameter of the fixed cylinder, so that the filter paper cylinder can be quickly and easily removed and installed when the sliding sleeve is pushed, thereby improving the convenience of product use and the efficiency of air detection.

[0022] 2. The present invention is configured such that the fixed cylinder can constantly drive the filter paper to move, so that the I-131 in the air can be retained on the filter paper under the action of the suction pump, thereby continuously calculating the concentration of I-131 in the air through the gamma spectrum detector and the I-131 concentration algorithm, thereby improving the continuity of the measurement.

[0023] 3. The present invention installs a bracket in the air collecting box so that the filter paper can be held up by the bracket when passing through the air collecting box, thereby preventing the filter paper from being damaged by the suction pump and improving the use effect of the device.

[0024] 4. The present invention installs guide columns on both sides of the air collecting box so that the filter paper can be kept at the same horizontal position when being conveyed through the air collecting box, thereby improving the filtering effect of I-131.

[0025] In the present invention, the filter paper cylinder can be quickly and easily removed and installed when the sliding sleeve is pushed, thereby improving the convenience of product use and the efficiency of air detection. At the same time, the concentration of I-131 in the air is continuously calculated through a gamma spectrum detector and an I-131 concentration algorithm to improve the continuity of measurement. The filter paper can also be guided to keep the filter paper horizontal, thereby improving the filtering effect of I-131. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main structure of an I-131 long-term continuous monitoring device proposed by the present invention;

[0027] Figure 2 This is a rear view structural schematic diagram of an I-131 long-term continuous monitoring device proposed by the present invention;

[0028] Figure 3 This is a schematic cross-sectional view of an I-131 long-term continuous monitoring device proposed by the present invention;

[0029] Figure 4 This is a schematic cross-sectional view of the fixed tube structure of an I-131 long-term continuous monitoring device proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the A-point enlarged structure of an I-131 long-term continuous monitoring device proposed by the present invention;

[0031] Figure 6 This is a schematic diagram of the cross-sectional structure of the gas collecting box of an I-131 long-term continuous monitoring device proposed by the present invention.

[0032] In the figure: 1. shell; 2. door; 3. air inlet pipe; 4. air outlet pipe; 5. window; 6. motor; 7. suction pump; 8. bracket; 9. air collecting box; 10. flow controller; 11. guide column; 12. fixed cylinder; 13. sliding sleeve; 14. connecting rod; 15. push rod; 16. swing rod; 17. fixed frame; 18. rotating shaft; 19. first push rod; 20. first sliding frame; 21. second sliding frame; 22. second push rod; 23. top plate; 24. spring; 25. first slide groove; 26. limit column; 27. second slide groove; 28. gamma energy spectrum detector; 29. ​​control panel. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Embodiment 1

[0035] Reference Figure 1-Figure 6, an I-131 long-term continuous monitoring device, including a shell 1, one side of the inner wall of the shell 1 is rotatably connected to two fixed cylinders 12, the diameter of the fixed cylinder 12 can be changed, so as to facilitate the installation of the filter paper cylinder, one side of the inner wall of the shell 1 is fixed with an air collecting box 9 and a flow controller 10 by bolts, and the top of the air collecting box 9 of the flow controller 10 is connected, the flow controller 10 can control the flow rate of gas entering, and the gas enters the air collecting box 9 after being controlled by the flow controller 10, the air inlet end of the air collecting box 9 is fixed with an air inlet pipe 3 by bolts, and the bottom inner wall of the shell 1 is fixed with an air suction pump 7 by bolts, and The air inlet end of the air suction pump 7 is connected to the bottom of the air collecting box 9, and the air outlet end of the air suction pump 7 is fixed with an air outlet pipe 4 by bolts, and the air outlet pipe 4 and the air inlet pipe 3 both penetrate the shell 1, and the air suction pump 7 sucks the air controlled by the flow controller 10 into the air collecting box 9 through the air inlet pipe 3, and the air is filtered by the filter paper and then discharged through the air outlet pipe 4. A gamma spectrum detector 28 is fixed to the inner wall of one side of the air collecting box 9 by bolts, and the fixed cylinder 12 includes a rotating shaft 18, and the rotating shaft 18 is rotatably connected to the inner wall of one side of the shell 1, and the circumferential outer wall of the rotating shaft 18 is slidably connected to the first sliding frame 20 and the second sliding frame 21, and the first sliding frame A spring 24 is fixed between the first sliding frame 20 and the second sliding frame 21 by bolts, and the circumferential outer walls of the first sliding frame 20 and the second sliding frame 21 are respectively rotatably connected with a plurality of first push rods 19 and a second push rod 22, and the first push rod 19 and the second push rod 22 are symmetrically installed, one end of the first push rod 19 is rotatably connected with a top plate 23, and the second push rod 22 is rotatably connected to the top plate 23, and one end of the rotating shaft 18 is slidably connected with a sliding sleeve 13, one side of the sliding sleeve 13 is fixed with a plurality of connecting rods 14 and a push rod 15 by bolts, and the connecting rod 14 is fixed to the second sliding frame 21, and the circumferential outer wall of the rotating shaft 18 is fixed with a plurality of fixed rods 14 and a push rod 15 by bolts. The fixed frame 17 and one end of the fixed frame 17 are both rotatably connected to the swing rod 16, and the push rod 15 maintains contact with the swing rod 16, so that the push rod 15 can push the swing rod 16 to swing when it moves. A first slide groove 25 is opened at one end of the swing rod 16, and a plurality of second slide grooves 27 are opened on the circumferential outer wall of the first sliding frame 20. The second slide groove 27 is rotatably connected to the limit column 26, and the first slide groove 25 is slidably connected to the limit column 26. A motor 6 is fixed to the outer wall of one side of the shell 1 by bolts, and one end of the output shaft of the motor 6 passes through the shell 1 and is fixed to one of the rotating shafts 18. The motor 6 provides power for the rotation of the fixed cylinder 12.

[0036] Embodiment 2

[0037] Reference Figure 1-Figure 6The present invention provides a new technical solution: an I-131 long-term continuous monitoring device, comprising a shell 1, a control panel 29 is fixed to the outer wall of one side of the shell 1 by bolts, two fixed cylinders 12 are rotatably connected to the inner wall of one side of the shell 1, and the diameter of the fixed cylinder 12 can be changed, so as to facilitate the installation of the filter paper cylinder, a door body 2 is rotatably connected to one side of the shell 1, a door lock is arranged on one side of the door body 2, and opening the door body 2 can facilitate the installation and replacement of the filter paper cylinder, a mounting port is opened on one side of the door body 2, and a window 5 is arranged in the mounting port, and the staff can observe the inside of the device conveniently through the window 5, an air collecting box 9 and a flow controller 10 are fixed to the inner wall of one side of the shell 1 by bolts, and the top of the air collecting box 9 of the flow controller 10 is connected, and the flow controller 10 can The flow rate of gas entering can be controlled. At the same time, the gas enters the air collecting box 9 after being controlled by the flow controller 10. The air inlet end of the air collecting box 9 is fixed with an air inlet pipe 3 by bolts. The bottom inner wall of the shell 1 is fixed with an air suction pump 7 by bolts, and the air inlet end of the air suction pump 7 is connected with the bottom of the air collecting box 9. The air outlet end of the air suction pump 7 is fixed with an air outlet pipe 4 by bolts, and the air outlet pipe 4 and the air inlet pipe 3 both pass through the shell 1. Two guide columns 11 are rotatably connected to the inner wall of one side of the shell 1. The guide columns 11 can keep the filter paper in the same horizontal position when it is transmitted through the air collecting box 9. The air suction pump 7 sucks the air controlled by the flow controller 10 into the air collecting box 9 through the air inlet pipe 3. At the same time, the air is discharged through the air outlet pipe 4 after being filtered by the filter paper. A gamma spectrum detector 28 is fixed to an inner wall of one side of the box 9 by bolts, and the fixed cylinder 12 includes a rotating shaft 18, which is rotatably connected to an inner wall of one side of the shell 1, and a first sliding frame 20 and a second sliding frame 21 are slidably connected to the circumferential outer wall of the rotating shaft 18, and a spring 24 is fixed between the first sliding frame 20 and the second sliding frame 21 by bolts, and a plurality of first push rods 19 and a second push rod 22 are rotatably connected to the circumferential outer walls of the first sliding frame 20 and the second sliding frame 21, respectively, and the first push rods 19 and the second push rods 22 are symmetrically installed, one end of the first push rod 19 is rotatably connected to a top plate 23, and the second push rod 22 is rotatably connected to the top plate 23, and one end of the rotating shaft 18 is slidably connected to a sliding sleeve 13, and a plurality of connecting rods are fixed to one side of the sliding sleeve 13 by bolts 14 and a push rod 15, and the connecting rod 14 is fixed to the second sliding frame 21, a plurality of fixing frames 17 are fixed to the circumferential outer wall of the rotating shaft 18 by bolts, one end of the fixing frames 17 is rotatably connected to the swing rod 16, the push rod 15 keeps in contact with the swing rod 16, so that the swing rod 16 can be pushed to swing when the push rod 15 moves, a first slide groove 25 is provided at one end of the swing rod 16, a plurality of second slide grooves 27 are provided on the circumferential outer wall of the first sliding frame 20, the second slide groove 27 is rotatably connected to the limiting column 26, and the first slide groove 25 is slidably connected to the limiting column 26, a motor 6 is fixed to the outer wall of one side of the shell 1 by bolts, and one end of the output shaft of the motor 6 passes through the shell 1 and is fixed to one of the rotating shafts 18, and the motor 6 provides power for the rotation of the fixed cylinder 12,A bracket 8 is fixed to the inner wall of one side of the housing 1 by bolts, and the bracket 8 passes through the air collecting box 9, and the bracket 8 can support the filter paper.

[0038] The present invention also provides a monitoring method of an I-131 long-term continuous monitoring device, comprising the following steps:

[0039] S1: First, put the filter paper cylinder on the fixed cylinder 12 near the side of the air inlet pipe 3. When putting it on, press the sliding sleeve 13, and the sliding sleeve 13 pushes the second sliding frame 21 to slide through the connecting rod 14. The second sliding frame 21 pulls the top plate 23 to move toward the center point through the second push rod 22. When the sliding sleeve 13 moves, the bottom of the swing rod 16 is pushed to move through the push rod 15, so that the other end of the swing rod 16 pushes the second sliding seat 20 to move through the limit column 26, and the second sliding seat 20 pulls the other end of the top plate 23 to move toward the center point through the first push rod 19, so that the diameter of the fixed cylinder 12 is reduced, which is convenient for the installation of the filter paper cylinder;

[0040] S2: After the filter paper cylinder is placed, the sliding sleeve 13 is released, and the first sliding frame 20 and the second sliding frame 21 are reset under the action of the spring 24, so that the filter paper cylinder is fixed. Similarly, the paper collecting cylinder is installed on the other fixed cylinder 12;

[0041] S3: Pass the filter paper on the filter paper cylinder through the bottom of the first guide column 11, then through the air collecting box 9, and then through the bottom of another guide column 11, and then fix one end of the filter paper on the paper collecting cylinder;

[0042] S4: Start the motor 6, the flow controller 10 and the gamma spectrum detector 28 through the control panel 29, and then start the air pump 7. The motor 6 drives the fixed cylinder 12 on the side away from the flow controller 10 to rotate to collect the used filter paper. At the same time, the air pump 7 sucks the air controlled by the flow controller 10 into the air collecting box 9 through the air inlet pipe 3. At the same time, the air is filtered by the filter paper and discharged through the air outlet pipe 4. At the same time, I-131 is filtered out by the filter paper, and then the gamma spectrum detector 28 is used to measure the radiation spectrum. Subsequently, the I-131 concentration algorithm is used to extract the I-131 full energy peak information obtained by sampling from the radiation spectrum, and the concentration of I-131 in the air is calculated in combination with the sampling and measurement time.

[0043] The I-131 concentration algorithm is as follows:

[0044]

[0045] Where 1.004×10 12 21.0022×10 5 , 1.1781, 1.1785×10 5 The actual computer error is within 5%. dTime is less than 15min, t s Less than 15 minutes.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A monitoring method for an I-131 long-term continuous monitoring device, characterized in that: The following steps are involved: S1: First, the filter paper cylinder is sleeved on the fixed cylinder (12) on the side close to the air inlet pipe (3). When sleeved, the sliding sleeve (13) is pressed, and the sliding sleeve (13) pushes the second sliding frame (21) to slide through the connecting rod (14). The second sliding frame (21) pulls the top plate (23) to move toward the center point through the second push rod (22). When the sliding sleeve (13) moves, the bottom of the swing rod (16) is pushed to move through the push rod (15), so that the other end of the swing rod (16) pushes the first sliding frame (20) to move through the limit column (26), and the first sliding frame (20) pulls the other end of the top plate (23) to move toward the center point through the first push rod (19), so that the diameter of the fixed cylinder (12) is reduced, which facilitates the installation of the filter paper cylinder; S2: After the filter paper cylinder is placed, the sliding sleeve (13) is released, and the first sliding frame (20) and the second sliding frame (21) are reset under the action of the spring (24), thereby fixing the filter paper cylinder. Similarly, the paper collection cylinder is installed on another fixed cylinder (12); S3: Pass the filter paper on the filter paper cylinder through the bottom of the first guide column (11), then through the air collecting box (9), and then through the bottom of another guide column (11), and then fix one end of the filter paper on the paper collecting cylinder; S4: Start the motor (6), the flow controller (10) and the gamma spectrum detector (28) through the control panel (29), then start the air pump (7), the motor (6) drives the fixed cylinder (12) on the side away from the flow controller (10) to rotate, and collect the used filter paper. At the same time, the air pump (7) sucks the air controlled by the flow controller (10) into the air collecting box (9) through the air inlet pipe (3), and the air is filtered by the filter paper and discharged through the air outlet pipe (4). At the same time, I-131 is filtered out by the filter paper, and then the gamma spectrum detector (28) is used to measure the radiation spectrum. Then, the I-131 concentration algorithm is used to extract the I-131 full energy peak information obtained by sampling from the radiation spectrum, and the concentration of I-131 in the air is calculated in combination with the sampling and measurement time; The I-131 long-term continuous monitoring device comprises a housing (1), one side inner wall of the housing (1) is movably connected to two fixed cylinders (12), one side inner wall of the housing (1) is fixedly connected to an air collecting box (9) and a flow controller (10), and the flow controller (10) is connected to the top of the air collecting box (9), the air inlet end of the air collecting box (9) is fixedly connected to an air inlet pipe (3), the bottom inner wall of the housing (1) is fixedly connected to an air suction pump (7), the air inlet end of the air suction pump (7) is connected to the bottom of the air collecting box (9), and the air outlet end of the air suction pump (7) is fixedly connected to the bottom of the air collecting box (9). The housing (1) is fixedly connected to an air outlet pipe (4), and the air outlet pipe (4) and the air inlet pipe (3) both penetrate the housing (1); a gamma spectrum detector (28) is fixedly connected to an inner wall of one side of the air collecting box (9); the fixed cylinder (12) comprises a rotating shaft (18), the rotating shaft (18) is rotatably connected to an inner wall of one side of the housing (1); a first sliding frame (20) and a second sliding frame (21) are movably connected to an outer circumferential wall of the rotating shaft (18); a spring (24) is fixedly connected between the first sliding frame (20) and the second sliding frame (21); ) are movably connected to a plurality of first push rods (19) and a plurality of second push rods (22), and the first push rods (19) and the second push rods (22) are symmetrically installed, one end of each of the first push rods (19) is movably connected to a top plate (23), and the second push rods (22) are rotatably connected to the top plate (23), one end of the rotating shaft (18) is movably connected to a sliding sleeve (13), one side of the sliding sleeve (13) is fixedly connected to a plurality of connecting rods (14) and a plurality of push rods (15), and the connecting rods (14) are fixed to the second sliding frame (21), and the circumference of the rotating shaft (18) is The outer wall is fixedly connected to a plurality of fixing frames (17), one end of each fixing frame (17) is movably connected to a swing rod (16), one end of the swing rod (16) is provided with a first slide groove (25), the circumferential outer wall of the first sliding frame (20) is provided with a plurality of second slide grooves (27), the second slide grooves (27) are movably connected to a limiting column (26), and the first slide grooves (25) are slidably connected to the limiting column (26), and the outer wall of one side of the housing (1) is fixedly connected to a motor (6), and one end of an output shaft of the motor (6) passes through the housing (1) and is fixed to one of the rotating shafts (18).

2. The monitoring method of the I-131 long-term continuous monitoring device according to claim 1, characterized in that: One side of the housing (1) is movably connected to a door body (2), and one side of the door body (2) is provided with a door lock.

3. The monitoring method of the I-131 long-term continuous monitoring device according to claim 2, characterized in that: A mounting opening is provided on one side of the door body (2), and a viewing window (5) is provided in the mounting opening.

4. The monitoring method of the I-131 long-term continuous monitoring device according to claim 1, characterized in that: A control panel (29) is fixedly connected to an outer wall of one side of the housing (1).

5. The monitoring method of the I-131 long-term continuous monitoring device according to claim 1, characterized in that: Two guide posts (11) are movably connected to an inner wall of one side of the housing (1).

6. The monitoring method of the I-131 long-term continuous monitoring device according to claim 1, characterized in that: A bracket (8) is fixedly connected to an inner wall of one side of the shell (1), and the bracket (8) passes through the air collecting box (9).

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