An iodine aerosol sampler for nuclear medicine workplace

Abstract

The present invention discloses an iodine aerosol sampler for nuclear medicine workplace, which belongs to the field of gas sampling technology, and comprises a sampler body, a negative pressure suction device is arranged on one side of the sampler body, a sampling port is opened on the top of the sampler body, a sampling cone for controlling the sampling area is connected in the sampling port through a disrupting connection ring, the sampling cone is connected to an impregnated activated carbon filter layer through a detachable quick connector, a filter mounting cover is arranged outside the sampling cone, and a filter body is connected to the outer wall of the filter mounting cover through an installation limit ring. The present invention fixes the impregnated activated carbon filter layer on the sampling cone, and changes the position of the adjustment sealing ring located in the filter mounting cover through an adjustable control part, and the adjustment sealing ring closes the air intake channel in the sampling cone at the bottom thereof, thereby changing its air intake area, changing the sampling area, and achieving the effect of quantitative sampling.

Description

Technical Field

[0001] The invention relates to the technical field of gas sampling, in particular to an iodine aerosol sampler in a nuclear medicine workplace. Background Art

[0002] The application of radioisotopes in medicine is gradually increasing. According to different diagnostic or treatment requirements, most of them use radionuclides that emit β and γ rays. I-131 is one of the most commonly used radionuclides in daily life. When using I-131 for medical diagnosis and treatment, it involves the operation of non-sealed radioactive materials. The air may be contaminated by radioactive materials, forming radioactive gases or aerosols in the air. When workers inhale, some of the radionuclides will be retained in the body, causing internal radiation hazards. Therefore, it is very necessary to monitor air pollution in the workplace. For the detection of aerosols in the air, samplers are often used. When sampling aerosols, filter paper, activated carbon filter paper and activated carbon layer impregnated with TEDA (triethylenediamine) are placed in the filter. The radioactive gas or aerosol after sampling cannot be easily removed, and the current sampler cannot reasonably, quickly and effectively extract samples of any area according to the actual amount. For this reason, a combined full iodine sampler for nuclear medicine aerosol detection is proposed. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the radioactive gas or aerosol after sampling cannot be easily removed, and the current sampler cannot reasonably, quickly and effectively extract samples of any area according to the actual usage, and to propose an iodine aerosol sampler for nuclear medicine workplace.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An iodine aerosol sampler for a nuclear medicine workplace comprises a sampler body, one side of the sampler body is provided with a negative pressure suction device, the top of the sampler body is provided with a sampling port, the sampling port is connected with a sampling cone for controlling a sampling area via a disrupting connection ring, the sampling cone is connected with an impregnated activated carbon filter layer via a detachable quick connector, a filter mounting cover is provided on the outside of the sampling cone, the outer side wall of the filter mounting cover is connected with a filter body via an installation limiting ring, the filter mounting cover is threadedly connected with a mounting cover, an extrusion connector for limiting and fastening the filter body is provided on the mounting cover, a built-in block is fixedly connected with the inner wall of the filter mounting cover, the built-in block is connected with an adjusting sealing ring via an adjustable control component, a fitting ring body is provided at the bottom of the adjusting sealing ring, and an airbag ring body is provided on the inner wall of the adjusting sealing ring.

[0006] Preferably, the detachable quick connector includes a fastening cover body threadedly arranged on the sampling cone barrel, the outer side wall of the fastening cover body is rotatably connected to an outer ring body, and the bottom of the outer ring body is evenly fixedly connected to a plurality of inclined pressure edges, and the plurality of inclined pressure edges limit and fix the impregnated activated carbon filter layer on the sampling cone barrel.

[0007] Preferably, the filter body is composed of an outer filter paper filter layer and an inner activated carbon filter paper, and the installation limit ring is annular, with one end being open to facilitate removal of the filter body.

[0008] Preferably, the extruded connector comprises a sliding frame arranged on the mounting cover, the inner wall of the sliding frame is connected with a sliding block via a fastening stud, and the sliding block is provided with a limiting vertical column adapted to the mounting limiting ring.

[0009] Preferably, the adjustable control member comprises a plurality of rotating adjustment studs rotatably arranged on the built-in block, the rotating adjustment studs are connected to the adjustment sealing ring via a screw nut, and an internal adjustment gear is fixedly connected to the top of the rotating adjustment studs.

[0010] Preferably, a transmission gear ring body is rotatably provided at the bottom of the installation cover, a control shaft is provided on the installation cover, and a control gear meshingly connected to the transmission gear ring body is fixedly connected to the bottom of the control shaft.

[0011] Preferably, a disrupting impeller blade is arranged inside the disrupting connection ring, and the air suction port of the negative pressure suction device is arranged directly below the sampling port;

[0012] Preferably, the negative pressure suction device is connected to the negative pressure suction device through a suction pipe, and the suction pipe is provided with a flow control valve for detecting the gas absorption capacity.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention fixes the impregnated activated carbon filter layer on the sampling cone, and changes the position of the adjustment sealing ring located in the filter mounting cover through an adjustable control component. The adjustment sealing ring closes the air inlet channel in the sampling cone at the bottom thereof, thereby changing its air inlet area, changing the sampling area, and achieving the effect of quantitative sampling.

[0015] 2. When the present invention is used, a filter body composed of an external filter paper filter layer and an internal activated carbon filter paper is installed on a filter mounting cover, fixed by an extrusion connector, and the impregnated activated carbon filter layer is installed on a sampling cone through a detachable quick connector, thereby achieving the effect of quickly and effectively installing and collecting aerosol detection filter materials before and after sampling, significantly reducing external interference and improving sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of an iodine aerosol sampler for nuclear medicine workplace proposed by the present invention;

[0017] Figure 2 This is a schematic diagram of the assembly of a sampling port structure in an iodine aerosol sampler for a nuclear medicine workplace proposed by the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of an adjustable control component in an iodine aerosol sampler for a nuclear medicine workplace proposed by the present invention;

[0019] Figure 4 The present invention is a schematic diagram of the cross-sectional structure of a sampling cone in an iodine aerosol sampler in a nuclear medicine workplace.

[0020] In the figure: 1. Sampler body; 2. Negative pressure suction device; 3. Disturbance connecting ring; 4. Sampling cone; 5. Impregnated activated carbon filter layer; 6. Filter installation cover; 7. Installation limit ring; 8. Filter body; 9. Installation cover; 10. Built-in block; 11. Adjustment sealing ring; 12. Air bag ring body; 13. Fastening cover body; 14. Outer ring body; 15. Inclined pressure edge; 16. Sliding frame; 17. Sliding block; 18. Limiting vertical column; 19. Rotating adjustment stud; 20. Internal adjustment gear; 21. Transmission gear ring body; 22. Control shaft; 23. Disturbance impeller blades; 24. Fitting ring body; 25. Flow control valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] Example, see Figure 1-4 , an iodine aerosol sampler for nuclear medicine workplace, comprising a sampler body 1, a negative pressure suction device 2 is arranged on one side of the sampler body 1,

[0023] The negative pressure suction device 2 is connected to the negative pressure suction device 2 through a suction pipe, and a flow control valve 25 for detecting the gas absorption capacity is provided on the suction pipe, which can control the capacity of the inhaled gas to achieve the effect of collecting a quantitative volume of gas;

[0024] A sampling port is provided at the top of the sampler body 1, and a sampling cone 4 for controlling the sampling area is connected to the sampling port through a disturbance connection ring 3. Furthermore, a disturbance impeller blade 23 is provided inside the disturbance connection ring 3, and the suction port of the negative pressure suction device 2 is provided directly below the sampling port.

[0025] It is worth noting that the suction generated by the negative pressure suction device 2 on the sampling port acts directly upward. The shape of the sampling cone 4 is such that its suction cannot act directly on the sampling cone 4. The negative pressure airflow is combed by setting the disrupting impeller blades 23 so that it can act evenly on the sampling cone 4, thereby ensuring a uniform effect during sampling. The disrupted airflow can achieve a uniform effect on the sampling filter material.

[0026] The sampling cone 4 is connected to the impregnated activated carbon filter layer 5 through a detachable quick connector; further, the detachable quick connector includes a fastening cover 13 threadedly arranged on the sampling cone 4, the outer side wall of the fastening cover 13 is rotatably connected to an outer ring body 14, and the bottom of the outer ring body 14 is evenly fixedly connected to a plurality of inclined pressing edges 15, and the plurality of inclined pressing edges 15 limit and fix the impregnated activated carbon filter layer 5 on the sampling cone 4;

[0027] A further advantage of adopting the above method is that the impregnated activated carbon filter layer 5 needs to be replaced and taken out after each use and sampling. In the present solution, the impregnated activated carbon filter layer 5 can be fixed on the sampling cone 4 by tilting the pressing edge 15, so as to fix it. When replacing, it is only necessary to rotate the fastening cover 13 to achieve the effect of disassembly and replacement.

[0028] A filter mounting cover 6 is arranged on the outside of the sampling cone 4, and the outer wall of the filter mounting cover 6 is connected to a filter body 8 through an installation limit ring 7. Furthermore, the filter body 8 is composed of an external filter paper filter layer and an internal activated carbon filter paper. The installation limit ring 7 is ring-shaped, and one end is opened to facilitate the removal of the filter body 8.

[0029] The setting of the installation limit ring 7 can ensure that the filter body 8 is guided and fixed on the outside of the filter installation cover 6, and by setting an extrusion connector, the installation cover 9 can be tightened after it is installed.

[0030] The filter mounting cover 6 is threadedly connected to the mounting cover 9, and the mounting cover 9 is provided with an extrusion connection piece for limiting and fastening the filter body 8. Furthermore, the extrusion connection piece includes a sliding frame 16 arranged on the mounting cover 9, and the inner wall of the sliding frame 16 is connected to a slider 17 through a fastening stud, and the slider 17 is provided with a limiting vertical column 18 adapted to the mounting limiting ring 7.

[0031] The limiting vertical column 18 is matched with the open end of the installation limiting ring 7. When the limiting vertical column 18 moves horizontally, the filter body 8 on the installation limiting ring 7 can be squeezed and fixed.

[0032] The inner wall of the filter mounting cover 6 is fixedly connected with a built-in block 10, which is connected with an adjustable sealing ring 11 through an adjustable control member, and a fitting ring body 24 is provided at the bottom of the adjustable sealing ring 11, which is in close contact with the filter mounting cover 6, and can achieve the effect of sealing the area below the adjustable sealing ring 11, and an airbag ring body 12 is provided on the inner wall of the adjustable sealing ring 11. The airbag ring body 12 is made of rubber, and the inside thereof can be injected with gas, which can meet the requirements of any position of the truncated cone sampling cone 4 to ensure the sealing effect between the two.

[0033] Furthermore, the adjustable control component includes a plurality of rotating adjustment studs 19 rotatably arranged on the built-in block 10, the rotating adjustment studs 19 are connected to the adjusting sealing ring 11 through a screw nut, an internal adjusting gear 20 is fixedly connected to the top of the rotating adjustment stud 19, a transmission gear ring body 21 is rotatably arranged at the bottom of the mounting cover 9, a control shaft 22 is arranged on the mounting cover 9, and a control gear meshingly connected to the transmission gear ring body 21 is fixedly connected to the bottom of the control shaft 22.

[0034] When the mounting cover 9 is installed, the transmission gear ring body 21 will be meshed and connected with the internal adjusting gear 20. When the control shaft 22 is rotated, the control gear connected to the control shaft 22 will drive the transmission gear ring body 21 to rotate. During the rotation of the transmission gear ring body 21, the internal adjusting gear 22 meshed with it will drive the rotating adjusting stud 19 to rotate, thereby moving the adjusting sealing ring 11 therein, thereby realizing the selection of sampling filter paper of any area.

[0035] When the present invention is in use, the filter body 8 composed of the outer filter paper filter layer and the inner activated carbon filter paper is installed on the installation limit ring 7, and the impregnated activated carbon filter layer 5 is installed on the sampling cone 4. The impregnated activated carbon filter layer 5 can be fitted and fixed on the sampling cone 4 by the inclined pressing edge 15, and the filter material is fixed by the installation of the installation cover 9, so that the sampling filter material can be replaced and installed conveniently, which greatly ensures the uniformity and accuracy of sampling.

[0036] During use, when the sampling area is adjusted according to the required area, the control shaft 22 can be rotated to realize that the control gear connected to the control shaft 22 drives the transmission gear ring body 21 to rotate. During the rotation of the transmission gear ring body 21, the internal adjustment gear 22 meshing with it drives the rotation adjustment stud 19 to rotate, driving the movement of the adjustment sealing ring 11 arranged outside the sampling cone 4, thereby changing the sampling area above (the area of ​​the sampling material flowing through during the air intake process) to realize the movement of the adjustment sealing ring 11 inside it, so that the adjustment sealing ring 11 can close the air intake channel in the sampling cone 4 at its bottom, thereby changing its air intake area and achieving the effect of changing the sampling area;

[0037] During the sampling process, the negative pressure suction device generates negative pressure on the sampling port. Under the action of negative pressure suction, the gas will first pass through the outermost filter body 8 composed of the external filter paper filter layer and the internal activated carbon filter paper to perform preliminary gas filtration, and then pass through the impregnated activated carbon filter layer 5 (impregnated TEDA (triethylenediamine) activated carbon layer) to filter again, absorbed into the sampling port, and discharged through the negative pressure suction device. The radioactive position is sampled and collected through the filter body 8 and the impregnated activated carbon filter layer 5 for subsequent detection.

[0038] 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. An iodine aerosol sampler for a nuclear medicine workplace, comprising a sampler body (1), characterized in that: A negative pressure suction device (2) is provided on one side of the sampler body (1); a sampling port is provided on the top of the sampler body (1); a sampling cone (4) for controlling the sampling area is connected to the sampling port via a disrupting connection ring (3); the sampling cone (4) is connected to an impregnated activated carbon filter layer (5) via a detachable quick-connect piece; a filter mounting cover (6) is provided outside the sampling cone (4); and the outer wall of the filter mounting cover (6) is connected to a filter via a mounting limit ring (7). The filter mounting cover (6) is threadedly connected to a mounting cover (9), the mounting cover (9) is provided with an extrusion connector for limiting and fastening the filter body (8), the inner wall of the filter mounting cover (6) is fixedly connected to a built-in block (10), the built-in block (10) is connected to an adjustable sealing ring (11) via an adjustable control member, a fitting ring body (24) is provided at the bottom of the adjustable sealing ring (11), and an airbag ring body (12) is provided on the inner wall of the adjustable sealing ring (11); The adjustable control member comprises a plurality of rotating adjustment studs (19) rotatably arranged on the built-in block (10), the rotating adjustment studs (19) being connected to the adjustment sealing ring (11) via a screw nut, and the top of the rotating adjustment studs (19) being fixedly connected to an internal adjustment gear (20); A transmission gear ring body (21) is rotatably arranged at the bottom of the installation cover (9), a control shaft (22) is arranged on the installation cover (9), and a control gear meshingly connected to the transmission gear ring body (21) is fixedly connected to the bottom of the control shaft (22).

2. A nuclear medicine workplace iodine aerosol sampler according to claim 1, characterized in that: The detachable quick-connector comprises a fastening cover body (13) threadedly arranged on the sampling cone (4); the outer side wall of the fastening cover body (13) is rotatably connected to an outer ring body (14); the bottom of the outer ring body (14) is evenly and fixedly connected to a plurality of inclined pressure edges (15); the plurality of inclined pressure edges (15) limit and fix the impregnated activated carbon filter layer (5) on the sampling cone (4).

3. A nuclear medicine workplace iodine aerosol sampler according to claim 1, characterized in that: The filter body (8) is composed of an outer filter paper filter layer and an inner activated carbon filter paper. The installation limit ring (7) is annular and has one end that is open, so that the filter body (8) can be easily removed.

4. The iodine aerosol sampler for nuclear medicine workplace according to claim 1, characterized in that: The extruded connection part comprises a sliding frame (16) arranged on the mounting cover (9), the inner wall of the sliding frame (16) being connected to a sliding block (17) via a fastening stud, and the sliding block (17) being provided with a limiting vertical column (18) adapted to the mounting limiting ring (7).

5. The iodine aerosol sampler for nuclear medicine workplace according to claim 1, characterized in that: Disturbing impeller blades (23) are arranged inside the disturbance connection ring (3), and the air suction port of the negative pressure suction device (2) is arranged directly below the sampling port.

6. The iodine aerosol sampler for nuclear medicine workplace according to claim 1, characterized in that: The negative pressure suction device (2) is connected to the negative pressure suction device (2) via a suction pipe, and the suction pipe is provided with a flow control valve (25) for detecting the gas absorption capacity.

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