CN220491617U - Low-background sodium iodide gamma energy spectrometer shielding lead chamber - Google Patents
Low-background sodium iodide gamma energy spectrometer shielding lead chamber Download PDFInfo
- Publication number
- CN220491617U CN220491617U CN202322053986.6U CN202322053986U CN220491617U CN 220491617 U CN220491617 U CN 220491617U CN 202322053986 U CN202322053986 U CN 202322053986U CN 220491617 U CN220491617 U CN 220491617U
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- lead
- chamber
- lead chamber
- shielding
- sodium iodide
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- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 title claims abstract description 96
- 235000009518 sodium iodide Nutrition 0.000 title claims abstract description 32
- 239000011133 lead Substances 0.000 claims abstract description 148
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- -1 polyethylene Polymers 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000002285 radioactive effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005251 gamma ray Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052704 radon Inorganic materials 0.000 description 1
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a low-background sodium iodide gamma energy spectrometer shielding lead chamber, which comprises a tripod, wherein the tripod is connected with an upper shielding lead chamber and a lower shielding lead chamber through a platform, the upper shielding lead chamber is formed by overlapping four lead block layers, the upper end of the upper shielding lead chamber is provided with a top cover which is opened and closed from the middle, and the lower shielding lead chamber is provided with a cavity and a cable inlet and outlet. The shielding lead chamber of the low-background sodium iodide gamma energy spectrometer is reasonably designed, the shielding lead chamber is divided into an upper part and a lower part, the upper shielding lead chamber and the lower shielding lead chamber are connected through the round steel disc, the round steel disc is adopted for connection, the use amount of lead is reduced, the manufacturing cost is reduced, the weight is lightened under the requirement of measuring the radioactive background of the sodium iodide gamma energy spectrometer, a lead block layer is made of materials such as lead, steel, copper, polyethylene and the like, the radiation background of the lead chamber is reduced, and the shielding requirement of environment radioactive detection and building material radionuclide detection can be met.
Description
Technical Field
The utility model relates to the field of measurement and application of a radioactive sodium iodide low-background gamma-ray spectrometer, in particular to a shielding lead chamber of the low-background sodium iodide gamma-ray spectrometer.
Background
In the process of environment radioactive detection and building material radionuclide detection, the sodium iodide gamma spectrometer is the most commonly used and most efficient detection equipment, a whole set of sodium iodide gamma spectrometer detection instrument mainly comprises a sodium iodide probe, a shielding lead chamber, computer processing software and other parts, and the main function of the shielding lead chamber is to shield interference such as low-energy cosmic rays, radon and daughter gamma rays from the surrounding environment, so that the radioactive background of the instrument is reduced, the measurement precision of the sample radionuclide is improved, and therefore, the lead shielding chamber is an important component of the sodium iodide gamma spectrometer, but the common lead shielding chamber has the following problems: the whole shielding lead chamber is formed by overlapping lead blocks with the same height, the detector is arranged in the inner cavity of the lead chamber, so that the lead chamber is higher in height, the lead consumption is larger, the manufacturing cost is improved, meanwhile, the quality of the lead is also very high, the difficulty in carrying and installing the lead chamber is improved, the detector is directly arranged in the cylindrical inner cavity of the lead chamber, the diameter of the inner cavity is 1-2 times larger than that of the detector, the detector is difficult to be in a stable state, the detector is easy to collide with to cause displacement when a sample is taken in the sample measuring process, the detector structure is easy to damage, the service life of the detector is shortened, the whole shielding lead chamber is lead and steel, low-energy X rays cannot be effectively shielded, and the background counting rate in an energy region 59 keV-3000V is 3-8 s < -1 > (cps) for a sodium iodide gamma spectrometer.
In order to solve the problems, we propose a low-background sodium iodide gamma spectrometer shielding lead chamber, which is improved against the defects of the prior art.
Disclosure of Invention
Aiming at the technical problems that the existing lead shielding chamber is single in design structure and large in lead consumption, the utility model provides a lead shielding chamber which is more reasonable in structural arrangement and small in lead consumption, so that a detector can be more stable and is used for shielding a low-background sodium iodide gamma spectrometer, the materials of the lead shielding chamber are various materials such as lead, steel, copper and polyethylene, and low-energy X rays can be effectively shielded, thereby reducing the radiation background of the lead chamber, enabling the background counting rate of the sodium iodide gamma spectrometer to be not more than 3s < -1 > (cps) in an energy region of 30 keV-3 MeV, and the utility model provides the following technical scheme:
the utility model discloses a low-background sodium iodide gamma energy spectrometer shielding lead chamber, which comprises a tripod, wherein the tripod is connected with an upper shielding lead chamber and a lower shielding lead chamber through a platform, the upper shielding lead chamber is formed by overlapping four lead block layers, the upper end of the upper shielding lead chamber is provided with a top cover which is opened and closed from the middle, and the lower shielding lead chamber is provided with a cavity and a cable inlet and outlet.
Preferably, the tripod comprises three supports, a round steel disc and a round iron coil, wherein the three supports are connected below the round steel disc, the three supports are connected through the round iron coil, and the upper shielding lead chamber and the lower shielding lead chamber are connected through the round steel disc.
Preferably, the inside cylindrical cavity that is of upper portion shielding plumbous room, plumbous layer periphery is the steel mould, and inside pouring plumbous, plumbous layer is steel, plumbous, copper, polyethylene material from outside to inside respectively constitute, steel thickness is 10mm, plumbous thickness is 100mm, copper thickness is 1mm, polyethylene thickness is 5mm.
Preferably, the upper layer the lead block layer sets up to the convex surface, and the lower floor the lead block layer sets up to the concave surface, and both agree with each other and form unsmooth dish tang, just still set up the mounting hole on the lead block layer.
Preferably, the top cover is formed by wrapping two lead blocks with semicircular steel plates, concave-convex plates are formed by mutually matching the two lead blocks, the two lead blocks are connected with the upper shielding lead chamber through a pressing rod type hinge, and a limiting valve for controlling the opening and closing angles is further arranged on the pressing rod type hinge.
Preferably, the lower shielding lead chamber is hollow cylindrical, the material comprises lead, steel and copper, a round steel disc is arranged on the upper portion of the lower shielding lead chamber, a cable inlet and a cable outlet are formed in the bottom of the lower shielding lead chamber, and an inner cavity of the lower shielding lead chamber is communicated with an inner cavity of the upper shielding lead chamber to form a closed lead chamber inner cavity for storing the probe.
Compared with the prior art, the utility model has the following beneficial effects:
1. the shielding lead chamber structure is reasonably designed, the shielding lead chamber is divided into an upper part and a lower part, the upper shielding lead chamber and the lower shielding lead chamber are connected through the round steel disc, the round steel disc is adopted for connection, the dosage of lead is reduced, the manufacturing cost is reduced, and the weight is lightened under the condition that the requirement of measuring the radioactivity background of the sodium iodide gamma spectrometer is met.
2. The lead block layer is made of materials such as lead, steel, copper, polyethylene and the like, so that the radiation background of a lead chamber is reduced, the background counting rate of a sodium iodide gamma spectrometer in an energy region of 30 keV-3 MeV is not more than 3s < -1 > (cps), and the shielding requirements of environment radioactivity detection and building material radionuclide detection can be met.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of a shielded lead chamber for a low background sodium iodide gamma spectrometer of the present utility model;
FIG. 2 is a schematic diagram of the connection of upper and lower shielded lead chambers for a low background sodium iodide gamma spectrometer shielded lead chamber of the present utility model;
FIG. 3 is a schematic diagram of the structure of a lower shielded lead chamber for a low background sodium iodide gamma spectrometer shielded lead chamber of the present utility model;
fig. 4 is a schematic diagram of the lower shielded lead chamber cut-away configuration for a low background sodium iodide gamma spectrometer shielded lead chamber of the present utility model.
In the figure: 1. a top cover; 2. a lead block layer; 3. a platform; 4. a circular iron coil; 5. a tripod; 6. a compression bar hinge; 7. a limit valve; 8. a mounting hole; 9. a round steel disc; 10. a cable inlet and a cable outlet; 11. an upper shielded lead compartment; 12. the lower part shields the lead chamber.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
Examples
As shown in fig. 1-4, a low-background sodium iodide gamma energy spectrometer shielding lead chamber comprises a tripod bracket 5, wherein the tripod bracket 5 is connected with an upper shielding lead chamber 11 and a lower shielding lead chamber 12 through a platform 3, the upper shielding lead chamber 11 is formed by superposing four lead block layers 2, the upper end of the upper shielding lead chamber 11 is provided with a top cover 1 which is opened and closed from the middle, the lower shielding lead chamber 12 is a shielding lead chamber with a cavity and a cable inlet and outlet 10, and the circular steel disc 9 is used for connection, so that the consumption of lead is reduced, the manufacturing cost is reduced, and the weight is lightened under the condition that the requirement of measuring the radioactivity background of the sodium iodide gamma energy spectrometer is met.
In this embodiment, tripod 5 includes three support, circular steel disk 9 and ring iron coil 4, circular steel disk 9 below is connected with three support, connect through ring iron coil 4 between the three support, three support becomes equilateral triangle and distributes, whole support is steel component, upper portion shielding plumbous room 11 and lower part shielding plumbous room 12 are connected through circular steel disk 9, circular steel disk 9 external diameter is 552mm, the inside round hole that opens the aperture and is 70mm, steel disk thickness is 10mm, open the through screw hole that the aperture is 14mm in 440mm diameter department of circular steel disk, the iron wire diameter of ring iron coil 4 is 10mm, ring iron coil 4 aperture is 400mm, play the fixed action to three support.
In this embodiment, the inside of the upper shielding lead chamber 11 is a cylindrical hollow chamber, the aperture of the chamber is 200mm, the height is 300mm, the periphery of the lead block layer 2 is a steel die, lead is poured inside, the height is 100mm, the lead block layer 2 is composed of steel, lead, copper and polyethylene materials from outside to inside, the thickness of the steel is 10mm, the thickness of the lead is 100mm, the thickness of the copper is 1mm, and the thickness of the polyethylene is 5mm.
In this embodiment, the upper lead block layer 2 is set to be convex, the lower lead block layer 2 is set to be concave, the two lead block layers are mutually matched to form a concave-convex plate spigot, and the lead block layer 2 is also provided with a mounting hole 8.
In this embodiment, the top cap 1 is formed by two lead blocks of semicircular steel plate parcel, and the height is 120mm, and the periphery is the steel mould of thickness 5mm, and the inside pours plumbous, and the concave-convex dish of formation is mutually agreed in the middle of two lead blocks, and two lead blocks are connected with upper portion shielding plumbous room 11 through pressing rod formula hinge 6, still install the stop valve 7 of control angle that opens and shuts on the pressing rod formula hinge 6.
In this embodiment, the lower shielding lead chamber 12 is a hollow cylindrical inner cavity, the aperture of the inner cavity is 70mm, the height is 120mm, the material is composed of lead, steel and copper, the lower shielding lead chamber 12 is composed of steel with the thickness of 5mm, lead with the thickness of 50mm and copper with the thickness of 1mm from outside to inside, the periphery is a steel mould, lead is poured inside, a round steel disc 9 is installed on the upper portion of the lower shielding lead chamber 12, a cable inlet and outlet 10 is formed in the bottom of the lower shielding lead chamber 12, the aperture is 36mm, the inner cavity of the lower shielding lead chamber 12 is communicated with the inner cavity of the upper shielding lead chamber 11 to form a closed lead chamber inner cavity for storing a probe, the height of the inner cavity is 500mm, when the probe is installed in the inner cavity, the lower head of the probe is clamped in the inner cavity of the lower shielding lead chamber 12 to play a role of stabilizing the probe, and a measured sample is placed in the middle of the end face of the probe.
The principle and the advantages of the utility model are that: the lead block layer 2 is composed of steel, lead, copper and polyethylene materials from outside to inside, the steel thickness is 10mm, the lead thickness is 100mm, the copper thickness is 1mm, the polyethylene thickness is 5mm, the lead consumption is small, the detector can be more stably used for shielding a lead chamber of a low-background sodium iodide gamma spectrometer, low-energy X rays can be effectively shielded, the radiation background of the lead chamber is reduced, the sodium iodide gamma spectrometer has a background counting rate of not more than 3s < -1 > (cps) in an energy region of 30 keV-3 MeV, the top cover 1 adopts an eccentric wheel press rod type to control the opening and closing angle according to the gravity principle and the lever principle, the opening and closing force is reduced, the sample in the shielding chamber is conveniently taken, the upper shielding lead chamber 11 adopts a structure of overlapping and connecting the upper lead block layer and the lower lead block layer, the shielding lead chamber can be freely increased and decreased according to the volume and the shape of different sample boxes to be tested, the use performance of the shielding lead chamber is more flexible, and the radioactivity of the lead chamber is effectively reduced.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The utility model provides a low background sodium iodide gamma energy spectrometer shielding lead room, includes tripod (5), its characterized in that: the three-legged support (5) is connected with an upper shielding lead chamber (11) and a lower shielding lead chamber (12) through the platform (3), the upper shielding lead chamber (11) is formed by superposing four lead block layers (2), a top cover (1) which is opened and closed from the middle is arranged at the upper end of the upper shielding lead chamber (11), and the lower shielding lead chamber (12) is a shielding lead chamber with a cavity and a cable inlet and outlet (10).
2. The low background sodium iodide gamma spectrometer shielded lead chamber of claim 1, wherein: the three-legged support (5) comprises three supports, a round steel disc (9) and a round iron coil (4), wherein the three supports are connected below the round steel disc (9), the three supports are connected through the round iron coil (4), and the upper shielding lead chamber (11) and the lower shielding lead chamber (12) are connected through the round steel disc (9).
3. The low background sodium iodide gamma spectrometer shielded lead chamber of claim 1, wherein: the upper shielding lead chamber (11) is internally provided with a cylindrical hollow chamber, the periphery of the lead block layer (2) is provided with a steel mould, lead is poured inside, the lead block layer (2) is respectively formed by steel, lead, copper and polyethylene materials from outside to inside, the thickness of the steel is 10mm, the thickness of the lead is 100mm, the thickness of the copper is 1mm, and the thickness of the polyethylene is 5mm.
4. The low background sodium iodide gamma spectrometer shield lead chamber of claim 3, wherein: the upper layer the lead block layer (2) is arranged to be convex, the lower layer the lead block layer (2) is arranged to be concave, the lead block layer and the lead block layer are mutually matched to form a concave-convex plate spigot, and the lead block layer (2) is also provided with a mounting hole (8).
5. The low background sodium iodide gamma spectrometer shielded lead chamber of claim 1, wherein: the top cover (1) is formed by wrapping two lead blocks with semicircular steel plates, concave-convex plates are formed by mutually matching the two lead blocks, the two lead blocks are connected with an upper shielding lead chamber (11) through a pressing rod type hinge (6), and a limiting valve (7) for controlling an opening and closing angle is further arranged on the pressing rod type hinge (6).
6. The low background sodium iodide gamma spectrometer shielded lead chamber of claim 2, wherein: the lower shielding lead chamber (12) is hollow cylindrical, the material comprises lead, steel and copper, a round steel disc (9) is installed on the upper portion of the lower shielding lead chamber (12), a cable inlet and outlet (10) is formed in the bottom of the lower shielding lead chamber (12), and the inner cavity of the lower shielding lead chamber (12) is communicated with the inner cavity of the upper shielding lead chamber (11) to form a closed lead chamber inner cavity for storing the probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322053986.6U CN220491617U (en) | 2023-08-02 | 2023-08-02 | Low-background sodium iodide gamma energy spectrometer shielding lead chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322053986.6U CN220491617U (en) | 2023-08-02 | 2023-08-02 | Low-background sodium iodide gamma energy spectrometer shielding lead chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220491617U true CN220491617U (en) | 2024-02-13 |
Family
ID=89825990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322053986.6U Active CN220491617U (en) | 2023-08-02 | 2023-08-02 | Low-background sodium iodide gamma energy spectrometer shielding lead chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220491617U (en) |
-
2023
- 2023-08-02 CN CN202322053986.6U patent/CN220491617U/en active Active
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