CN217180198U - Gamma is system appearance device for spectrometer - Google Patents
Gamma is system appearance device for spectrometer Download PDFInfo
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- CN217180198U CN217180198U CN202220986969.0U CN202220986969U CN217180198U CN 217180198 U CN217180198 U CN 217180198U CN 202220986969 U CN202220986969 U CN 202220986969U CN 217180198 U CN217180198 U CN 217180198U
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- limiting
- sample box
- supporting device
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- 238000003825 pressing Methods 0.000 claims abstract description 42
- 238000002360 preparation method Methods 0.000 claims abstract description 26
- 239000000428 dust Substances 0.000 claims description 18
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000002285 radioactive effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 239000002184 metal Substances 0.000 description 5
- 238000005056 compaction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005464 sample preparation method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
A sample preparation device for a gamma energy spectrometer belongs to the field of radioactive sample detection, and comprises a base, a limiting device, a pressure rod, a pressing die, a dust-proof device, a supporting device and a sample box positioning device; the base is arranged at the lower end of the supporting device and is connected with the supporting device; the limiting device is arranged on the base and connected with the base; the pressure lever is arranged on the supporting device and is hinged with the supporting device; the device has the characteristics of good consistency of sample manufacturing, pollution avoidance, high efficiency and simple structure.
Description
Technical Field
The utility model belongs to radioactive sample detection field, in particular to detection sample preparation device that gamma energy spectrometer used.
Background
In the detection process of radioactive samples, the gamma energy spectrum relative measurement method is the detection method with the widest application range. The solid sample to be measured needs to be processed into powder, the powder is put into a plastic sample box with a specific size, a gamma energy spectrum measuring system is put in the box, and the nuclide activity of the sample is obtained by comparing the target nuclide counting rate with the nuclide counting rate of a standard substance sample. According to the method, the consistency of the state of the sample with the standard substance is kept in the sample preparation process, and the method is an important factor influencing the accuracy of the measurement method; according to the structure of a high-purity germanium gamma energy spectrometer detector, the relative detection efficiency of a system and the sample preparation efficiency are combined, and a low-background plastic cylindrical sample box with the diameter of 75mm and the height of 35mm is commonly used in domestic laboratories at present. The sample preparation process of the standard sample and the sample to be detected is kept consistent, the standard sample or the sample to be detected with certain mass is put into a low-background plastic sample, and the sample is compacted, so that the self-absorption efficiency of the sample in the measurement process is kept consistent with that of the standard substance sample as far as possible, and the influence of the counting rate of an instrument is reduced; at present, in the sample preparation process of each laboratory, a plurality of cylinders with the diameter similar to that of a sample box are mainly used, the materials are rubber or metal, and the samples are compacted by hand pressure of experimenters, so that the sample preparation method is simple and suitable for preparing a small amount of samples with similar density, but the sample preparation method has the following defects: 1. the standard sample can be used for a long time after one-time preparation is usually finished, but the hand sample pressing force of different experimenters is different, so that the compaction force of the sample to be detected cannot be the same as that of the standard sample, the counting rate of the sample is influenced, and the final result of the sample is influenced; 2. the measured sample is powdery, part of the sample can be taken out of the sample box by gas in sample pores in the compaction process, dust floating can be formed in a ventilation cabinet, and internal irradiation can be formed after a sample loader sucks dust if the sample with high radioactivity meets the sample with high radioactivity, so that the damage is large; 3. some samples are difficult to compact due to the difference of properties or structural states, or the quality of the samples after compaction is still insufficient, so that the difference of the sample loading quality of the tested sample and the standard sample is large, and the measurement result is influenced; 4. for a sample with relatively high density, the condition that the quality of the sample is the same as that of a standard sample is easily achieved, so that an experimenter cannot achieve the purpose of compaction in the sample pressing process, and the measurement result is influenced; 5. in some geological survey projects, when the sample amount is large, the sample loading method is low in efficiency, the working strength of sample preparation personnel is high, and the time limit requirement of a client cannot be met.
Disclosure of Invention
Aiming at the defects of the existing sample preparation method, the utility model provides a sample preparation device, which can improve the sample preparation quality and the sample preparation efficiency, lighten the working strength of experimenters, reduce the dust hazard in the sample preparation process through a specific device and ensure the health of the experimenters; the specific technical scheme is that a system appearance device for gamma energy spectrometer, its characterized in that: the sample preparation device comprises a base, a limiting device, a pressure rod, a pressing die, a dust-proof device, a supporting device and a sample box positioning device; the base is arranged at the lower end of the supporting device and is connected with the supporting device; the limiting device is arranged on the base and connected with the base; the pressure lever is arranged on the supporting device and is hinged with the supporting device; the pressing die is arranged in the dust avoiding device and is sleeved with the dust avoiding device, and the upper end of the pressing die penetrates through the dust avoiding device to be hinged or sleeved with the pressing rod; the dust-proof device is arranged at the periphery of the sample box, is sleeved with the sample box, is a hollow cavity body and can cover the sample box; the supporting device is arranged on the base, the lower end of the supporting device is hinged with the base and can rotate on the base, and the upper part of the supporting device is hinged with the pressure rod; the sample box positioning device is arranged on the base, is connected with the base, is matched with the sample box in size and shape, and can position the sample box on the base.
Furthermore, the base is semicircular.
Furthermore, stop device be the arc, including spacing body, scale mark box spacing groove to match with the arc of base.
Furthermore, stop device on have scale mark, scale mark set up in spacing body outside, that is the protruding one side of cambered surface.
Furthermore, the limiting device is provided with a limiting groove, and the limiting groove is arranged at the upper end of the limiting body.
Further, the sample box positioning device is a pit.
Further, the sample cartridge positioning device is a hollow cylinder.
Furthermore, the sample box positioning device is composed of a plurality of bulges, and the inner ring of each bulge is matched with the shape and the size of the sample box.
Furthermore, a plurality of sample box positioning devices are distributed on the base in an arc area with the rotating shaft center of the supporting device as the center of a circle.
Advantageous effects
The utility model has the advantages that the dust-avoiding sleeve structure is used, the scattering and flying of radioactive dust into the air are reduced, the health of workers is protected, and the pollution in the operation process is reduced; the sleeve is replaceable, and for a high-radioactivity sample, a disposable anti-contamination film can be used in the sleeve, so that surface pollution is reduced; the pressure rod is used for increasing the moment arm, so that a sample which is difficult to compact can be better prepared by using a longer moment arm, the sample preparation quality is improved, and the workload is reduced; the use of the limiting rods with different scales can control the depth of a pressed sample, can more accurately control the thickness of the sample, and reduce the measurement error; the design of the fixing groove positions of the plurality of sample boxes can meet the sample preparation requirements of different sample boxes; the design of the scale limiting rod can control the pressing force and can quickly know the thickness of a pressed sample.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is a schematic view of the top view structure of the present invention
FIG. 3 is a schematic structural view of the limiting device of the present invention
1. The device comprises a base, 2 parts of a limiting device, 3 parts of a pressure rod, 4 parts of a pressing die, 5 parts of a dust avoiding device, 6 parts of a supporting device, 7 parts of a sample box, 8 parts of a sample box positioning device, 21 parts of a limiting body, 22 parts of scale marks and 23 parts of a limiting groove.
Detailed Description
In order to better explain the technical scheme of the present invention, the specific implementation of the present invention will be further explained with reference to the accompanying drawings, as shown in fig. 1 and fig. 2, in this example, a metal plate with a thickness of 20 mm is selected, and is larger than a semi-circle, and the radius of 400 mm is used as a base 1, and the base 1 is placed in a sample preparation site; selecting round steel with the length of 250 mm as the supporting device 6, manufacturing a step at the lower end of the supporting device 6, arranging a mounting hole of the supporting device 6 at the center of the circle of the base 1, inserting the lower end of the supporting device 6 into the hole, and rotating in the hole; in this example, a hinge hole is selected at the upper end of the supporting device 6, and a shaft pin is adopted to hinge with one end of the pressure lever 3; the method comprises the following steps that a metal cylinder with the diameter matched with the inner diameter of a sample box 7 is selected, a connecting rod is arranged at the upper end of the metal cylinder to serve as a pressing die 4, a lantern ring is arranged at the upper end of the connecting rod of the pressing die 4 and is sleeved with a pressing rod 3, and for convenience in operation, the inner diameter of the lantern ring is larger than the outer diameter of the pressing rod 3, so that the pressing die 4 can move on the pressing rod 3 conveniently to adapt to pressing of the sample boxes 7 located at different positions on a base 1; in order to conveniently pass through a hole in the upper part of the dust avoiding device 5, a lantern ring at the upper end of the pressing die 4 can be selected to be in threaded connection with a connecting rod of the pressing die 4, or the connecting rod is in threaded connection with a metal cylinder; in the embodiment, a steel plate is selected as the limiting device 2, the steel plate is bent in an arc shape in the length direction and matched with the arc shape of the base 1, the height of the limiting device 2 is overlapped with the lower limit position of the pressing rod 3, namely, the pressing rod 3 touches the height of the limiting device 2 when pressing down, the pressing process is completed, different heights of the limiting device 2 are selected through tests according to different samples and sample boxes 7, and the limiting device 2 is fixedly arranged on one side of the arc shape of the base 1; in this example, a cylindrical cavity with a lower opening is selected as the dust-proof device 5, the diameter of the inner cavity of the dust-proof device 5 is matched with the outer diameter of the sample box 7, the height of the inner cavity is greater than that of the sample box 7, and for the sample box 7 with the height of 35mm, the height of the dust-proof device 5 is 40-50 mm; a through hole of the connecting rod of the pressing die 4 is formed in the upper part of the dust avoiding device 5, the hole is positioned on the axis of the dust avoiding device 5, penetrates through the thickness of the upper bottom and has a diameter larger than the outer diameter of the connecting rod of the pressing die 4; sleeving a dust-proof device 5 outside the pressing die 4 and covering the dust-proof device outside the sample box 7; in the embodiment, cylindrical depressions are arranged on the base 1 as the sample box positioning devices 8, two rows are arranged on the base 1 by taking the rotating center of the supporting device 6 as the center of a circle and are arranged in a concentric arc shape, and the distance between the two sample box positioning devices 8 is ensured to be larger than the maximum diameter of the dust avoiding device 5; the depth of the sample box positioning device 8 is 10 mm, and the diameter of the sample box positioning device 8 is 2-3 mm larger than that of the sample box 7, so that the sample box 7 can be conveniently taken out or put in the sample box positioning device 8; thus, the utility model is implemented.
When the device is used, a radioactive sample to be detected which is close to the weight of a standard sample is weighed in a sample box 7 (in the embodiment, the sample box 7 with the diameter of 75mm and the height of 35mm is taken as an example), the sample box 7 filled with the sample to be detected is placed in the sample box 7, the sample box 7 is placed in a sample box positioning device 8 on a base 1, a dust avoiding device 5 is sleeved on a pressing die 4, the position of the pressing die 4 is adjusted to correspond to the position of the sample box 7, the pressing die 4 is placed in an upper opening of an inner cavity of the sample box 7, one suspended end of a pressing rod 3 is pulled downwards, the pressing rod 3 drives the pressing die 4 to move downwards in the sample box 7, the sample to be detected in the sample box 7 is compacted, when the pressing rod 3 reaches a limiting groove 23 on the limiting device 2, the pressing is stopped, different limiting grooves 23 and corresponding scale marks 22 are selected according to different samples in different sample boxes 7, and different limiting positions are carried out on the pressing rod 3; then, the suspended end of the pressure lever 3 is lifted upwards to separate the pressing die 4 and the dust-proof device 5 from the sample box 7, and the sample box 7 is taken out from the sample box positioning device 8 on the base 1, thus completing one-time sample preparation; since the pressing stroke is the same each time, the heights of the pressed samples are consistent; in the pressing process, the dust avoiding device 5 is covered on the periphery of the sample box 7, so that dust is not dispersed, and pollution is avoided; meanwhile, in order to protect the health of operators, the dust-proof device 5 can be replaced or a disposable anti-contamination film is used, so that the operation safety is improved; when in operation, the extension bar can be used on the pressure bar 3, thus reducing the labor intensity of the operation; because the sample box 7 is positioned in the sample box positioning device 8 in the pressing process and cannot move greatly, the uniformity of the pressed sample is ensured.
Claims (9)
1. A gamma energy spectrometer is with system appearance device which characterized in that: the sample preparation device comprises a base, a limiting device, a pressure rod, a pressing die, a dust-proof device, a supporting device and a sample box positioning device; the base is arranged at the lower end of the supporting device and is connected with the supporting device; the limiting device is arranged on the base and connected with the base; the pressure lever is arranged on the supporting device and is hinged with the supporting device; the pressing die is arranged in the dust avoiding device and is sleeved with the dust avoiding device, and the upper end of the pressing die penetrates through the dust avoiding device and is hinged or sleeved with the pressing rod; the dust-proof device is arranged at the periphery of the sample box, is sleeved with the sample box, is a hollow cavity body and can cover the sample box; the supporting device is arranged on the base, the lower end of the supporting device is hinged with the base and can rotate on the base, and the upper part of the supporting device is hinged with the pressure rod; the sample box positioning device is arranged on the base, is connected with the base, is matched with the sample box in size and shape, and can position the sample box on the base.
2. The sample preparation device for a gamma energy spectrometer according to claim 1, wherein: the base is semicircular.
3. The sample preparation device for a gamma energy spectrometer according to claim 1, wherein: the limiting device is arc-shaped and comprises a limiting body and a limiting groove of a scale marking box, and the limiting groove is matched with the arc-shaped base.
4. A sample preparation device for a gamma energy spectrometer according to claim 3, wherein: the limiting device is provided with scale marks, and the scale marks are arranged outside the limiting body, namely on one side of the convex cambered surface.
5. A sample preparation device for a gamma energy spectrometer according to claim 3, wherein: the limiting device is provided with a limiting groove, and the limiting groove is arranged at the upper end of the limiting body.
6. The sample preparation device for a gamma energy spectrometer according to claim 1, wherein: the sample box positioning device is a pit.
7. The sample preparation device for a gamma energy spectrometer according to claim 1, wherein: the sample box positioning device is a hollow cylinder.
8. The sample preparation device for a gamma energy spectrometer according to claim 1, wherein: the sample box positioning device is composed of a plurality of bulges, and the inner ring of each bulge is matched with the size of the shape box of the sample box.
9. The sample preparation device for a gamma energy spectrometer according to claim 1, wherein: the sample box positioning devices are distributed on the base in an arc area with the rotating shaft center of the supporting device as the center of a circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220986969.0U CN217180198U (en) | 2022-04-27 | 2022-04-27 | Gamma is system appearance device for spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220986969.0U CN217180198U (en) | 2022-04-27 | 2022-04-27 | Gamma is system appearance device for spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217180198U true CN217180198U (en) | 2022-08-12 |
Family
ID=82710193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220986969.0U Active CN217180198U (en) | 2022-04-27 | 2022-04-27 | Gamma is system appearance device for spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217180198U (en) |
-
2022
- 2022-04-27 CN CN202220986969.0U patent/CN217180198U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.79, Kaiyuan Road, Huiji District, Zhengzhou City, Henan Province, 450000 Patentee after: Henan Nuclear Technology Application Center Address before: No.79, Kaiyuan Road, Huiji District, Zhengzhou City, Henan Province, 450000 Patentee before: Henan Nuclear Industry Geology Bureau (Henan Nuclear Industry Radionuclide Detection Center) |
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| CP03 | Change of name, title or address |