A high purity germanium gamma spectrometer rack

Abstract

This utility model discloses a holder for a high-purity germanium gamma spectrometer, comprising an inner cylinder, an outer cylinder, a liftable inner cylinder, and a receiving cylinder. The inner cylinder has openings at both its upper and lower ends, and a partition is located in the middle of its inner side. An elastic structure is provided in the lower opening of the inner cylinder, which can be fitted onto the probe. A retaining ring is provided on the outer side of the middle portion of the inner cylinder. The outer cylinder is rotatably fitted onto the retaining ring on the outer side of the middle portion of the inner cylinder through a retaining groove on its lower inner side. An external thread is provided on the outer side of the upper opening of the inner cylinder. The inner cylinder is fitted onto the outer side of the upper opening of the inner cylinder through an internal thread that matches the external thread on its inner side. Limiting grooves are provided on the left and right sides of the upper inner side of the outer cylinder. The function of this utility model is that the device can be quickly and stably installed on the probe, and the elastic pad on its inner side protects the probe from friction by hard materials. Furthermore, the receiving cylinder of this device has a larger adjustable vertical distance and higher adjustment precision.

Description

Technical Field

[0001] This utility model patent belongs to the field of radioactive laboratory equipment technology, specifically relating to a shelf for a high-purity germanium gamma spectrometer. Background Technology

[0002] The high-purity germanium gamma spectrometer (HPGe gamma spectrometer), also known as a high-purity germanium (HPGe) gamma spectrometer, is suitable for measuring the activity of radioactive nuclides that emit gamma rays during decay. It can be used for the identification and quantitative analysis of nuclides such as K, Co, and Cs in solid and liquid substances of different geometries. Different nuclides emit gamma rays of different energies during decay, which are detected and energy-discriminated by the high-purity germanium gamma spectrometer, displayed as an energy spectrum. By analyzing the energy spectrum, the corresponding nuclide information can be obtained. In application, for high-density materials (such as soil, cement, and cinders), a cylindrical sample container with a diameter close to that of the detector is generally selected; for low-density materials (such as water, vegetables, and grains), an inverted concave Marin cup with a concave diameter close to that of the detector is used.

[0003] Based on qualitative analysis, quantitative analysis of the sample to be tested (a cylindrical container or marinating cup containing the analyte) requires not only that its geometry be consistent with the standard source sample, but also that the sample's position relative to the top of the probe (cylindrical probe) be consistent. Manually placing the sample without a support frame introduces significant errors. Ideally, the sample should be placed at the top of the probe, coaxial with the cylindrical detector to minimize the distance, thereby maximizing detection efficiency and improving measurement efficiency and result accuracy.

[0004] Because the probe of the high-purity germanium gamma spectrometer is a smooth cylindrical structure, it is currently quite troublesome for inspectors to place and adjust the position of the sample to be tested. It is particularly easy to place it off-center or even cause the sample to slip off, resulting in the sample and the probe not being coaxial. It also takes a long time to adjust the coaxiality of the two, ranging from half a minute to several minutes.

[0005] As described in the prior art Chinese patent (CN218383318U) regarding a sample positioning bracket for a high-purity germanium gamma spectrometer, it includes a cylinder for mounting on a probe. Inside the cylinder is a baffle perpendicular to the cylinder's axis. The inner wall of the cylinder, mounted on the probe, has a small clearance fit with the probe, and the top wall of the probe abuts against the lower wall of the baffle. The area inside the cylinder and above the probe is used to accommodate the sample to be tested, which has a small clearance fit with the inner wall of the cylinder, and its lower end abuts against the upper wall of the baffle. Although it can be quickly mounted on the probe, the inventors discovered the following drawbacks after further research: 1. Although it can perform basic detection and analysis on samples and play an auxiliary role, its positioning bracket is fixed and the vertical distance between the radiation point source and the probe cannot be adjusted. During the accuracy verification, the probe cannot be adjusted according to the vertical distance required by different radiation point sources, which causes inconvenience and affects the detection accuracy of the probe. 2. While the sample holder for a high-purity germanium spectrometer disclosed in the existing Chinese patent (CN219590524U) can change the vertical distance between the radiation point source and the probe, its adjustment range is too small and the adjustment accuracy is insufficient. 3. The above-mentioned existing technologies also have a common problem: the lower part of the positioning bracket and the probe sleeve are rigidly sleeved. This will cause repeated friction on the probe after multiple uses, which will damage the probe.

[0006] To address the aforementioned problems, this invention proposes a storage rack for a high-purity germanium gamma spectrometer. Utility Model Content

[0007] To address the aforementioned issues, this invention provides a storage rack for a high-purity germanium gamma spectrometer. This device allows for quick and stable mounting on the probe, and its inner elastic pad protects the probe from friction by hard materials. Furthermore, the device's housing has a larger adjustable vertical distance and higher adjustment precision.

[0008] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution: a storage rack for a high-purity germanium gamma spectrometer, comprising an inner cylinder, an outer cylinder, a liftable inner cylinder, and a receiving cylinder. The inner cylinder has openings at both its upper and lower ends and a partition is provided in the middle of its inner side. An elastic structure is provided in the lower opening of the inner cylinder, which can be fitted onto the probe. A retaining ring is provided on the outer side of the middle part of the inner cylinder. The outer cylinder is rotatably fitted onto the retaining ring on the outer side of the middle part of the inner cylinder through a retaining groove on its lower inner side. An external thread is provided on the outer side of the upper opening of the inner cylinder. The inner cylinder is fitted onto the outer side of the upper opening of the inner cylinder through an internal thread that matches the external thread on its inner side. Limiting grooves are provided on the left and right sides of the upper inner side of the outer cylinder. Limiting clips corresponding to the limiting grooves are provided on the left and right sides of the outer side of the inner cylinder, and the limiting clips slide and engage in the limiting grooves. The receiving cylinder is positioned and installed on the top of the inner cylinder through a positioning groove, and a positioning clip is provided on the bottom of the outer edge of the receiving cylinder.

[0009] Preferably, the limiting card is provided with a scale.

[0010] Preferably, the elastic structure includes a spiral-shaped limiting pad and limiting strips evenly arranged in a ring around the probe axis.

[0011] Preferably, the outer side of the lower opening of the inner cylinder is provided with anti-slip texture.

[0012] The beneficial effects of this utility model are: In use, the outer cylinder is first held while the inner cylinder is rotated. Driven by the threads of the inner cylinder, and limited by the inner limiting groove of the outer cylinder, the inner cylinder is raised or lowered through the gap between the inner and outer cylinders according to the required vertical distance between the radiation point source and the probe. The height of raising or lowering can be adjusted by referring to the scale on the limiting card. After adjustment, the device is then fitted onto the probe through the lower opening of the inner cylinder. Finally, the receiving cylinder is installed, and the substance to be tested can be placed inside. As can be seen from the above, compared with the prior art, this device can be quickly and stably installed on the probe, and the elastic rubber pad on its inner side protects the probe from friction by hard materials. Furthermore, the vertical distance adjustable by the receiving cylinder is greater, and the adjustment precision is higher. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. Figure 1 This is a structural diagram of the present invention with anti-slip texture; Figure 2 This is a top view of the present invention; Figure 3 This utility model Figure 2 A cross-sectional view of section A; Figure 4 This is a structural diagram of the present invention without anti-slip texture; Figure 5 This is a top view of the present invention; Figure 6 This utility model Figure 5 A cross-sectional view of section B; The attached diagram lists the components represented by each number as follows: 1. Inner cylinder; 2. Outer cylinder; 3. Inner tube; 4. Receiving cylinder; 5. Partition; 6. Lower opening of inner cylinder; 7. Snap ring; 8. Snap groove; 9. Upper opening of inner cylinder; 10. Limiting clip; 11. Limiting groove; 12. Positioning groove; 13. Positioning clip; 14. Scale; 15. Limiting rubber pad; 16. Limiting rubber strip; 17. Anti-slip texture; 18. Probe. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example 1

[0015] like Figures 1 to 6 As shown, the prior art in this embodiment has the following problems: After research, the inventors found that the prior art also has the following defects: Although it can perform basic detection and analysis on the sample and play an auxiliary role, its positioning bracket is fixed and the vertical distance between its radiation point source and the probe 18 cannot be adjusted. Even if it is adjustable, its adjustment range is too small and the adjustment accuracy is insufficient. The lower part of the positioning bracket and the probe 18 are rigidly connected. After repeated use, the probe 18 will be rubbed repeatedly, which will damage the probe 18.

[0016] Therefore, the inventor provides a storage rack for a high-purity germanium gamma spectrometer, including an inner cylinder 1, an outer cylinder 2, a liftable inner cylinder 3, and a receiving cylinder 4. The inner cylinder 1 has openings at both the top and bottom, and a partition 5 is provided in the middle of the inner side of the inner cylinder 1. The lower opening 6 of the inner cylinder, which can be fitted onto the probe 18, has an elastic structure. A retaining ring 7 is provided on the outer side of the middle part of the inner cylinder 1. The outer cylinder 2 is rotatably fitted onto the retaining ring 7 on the outer side of the middle part of the inner cylinder 1 through a retaining groove 8 on its lower inner side. An external thread is provided on the outer side of the upper opening 9 of the inner cylinder. The inner cylinder 3 is fitted onto the outer side of the upper opening 9 of the inner cylinder through an internal thread that matches the external thread on its inner side. Limiting grooves 11 are provided on the left and right sides of the upper inner side of the outer cylinder 2. Limiting clips 10 corresponding to the limiting grooves 11 are provided on the left and right sides of the outer side of the inner cylinder 3, and the limiting clips 10 slide and engage in the limiting grooves 11. The receiving cylinder 4 is positioned and installed on the top of the inner cylinder 3 through a positioning groove 12, and a positioning clip 13 is provided on the bottom of the outer edge of the receiving cylinder 4.

[0017] The effect is as follows: In use, the outer cylinder 2 can be held first and the inner cylinder 1 rotated. Driven by the thread of the inner cylinder 1, and limited by the inner limiting groove 11 on the inner side of the outer cylinder 2, the inner cylinder 3 can be raised or lowered from the gap between the inner cylinder 1 and the outer cylinder 2 according to the required vertical distance between the radiation point source and the probe 18. At the same time, the height of raising or lowering can be adjusted with reference to the scale 14 on the limiting card 10. After adjustment, the device is then fitted onto the probe 18 through the lower opening 6 of the inner cylinder. Finally, the receiving cylinder 4 is installed, and the substance to be tested can be placed inside. As can be seen from the above, compared with the existing technology, this device can be quickly and stably installed on the probe 18, and the elastic rubber pad on its inner side protects the probe 18 from friction by hard materials. At the same time, the vertical distance that the receiving cylinder 4 of this device can adjust is greater, and the adjustment accuracy is higher.

[0018] Furthermore, the limit card 10 is equipped with a scale 14, which makes it easier for users to observe the height of the inner cylinder 3 as it rises and falls, thereby improving the accuracy of height adjustment.

[0019] Furthermore, the elastic structure includes a spiral-shaped limiting rubber pad 15 and a limiting rubber strip 16 evenly arranged in a ring around the axis of the probe 18. When the elastic structure is set as a spiral-shaped limiting rubber pad 15, the user can rotate it to quickly install the lower opening 6 of the inner cylinder onto the probe 18 during installation and use, until it hits the partition 5. When the elastic structure is set as a limiting rubber strip 16, the user can vertically install the lower opening 6 of the inner cylinder onto the probe 18 during installation and use, until it hits the partition 5. Both structures can prevent the lower opening 6 of the inner cylinder from rubbing against the edge of the probe 18 and causing damage due to the non-perpendicular direction of force during installation. The rotating limiting rubber pad 15 has a better performance.

[0020] Furthermore, anti-slip texture 17 is provided on the outer side of the lower opening 6 of the inner cylinder to prevent slippage when the outer cylinder 2 is held and the inner cylinder 1 is rotated.

[0021] The working principle of this utility model: In use, first hold the outer cylinder 2 and rotate the inner cylinder 1. Driven by the thread of the inner cylinder 1, the inner cylinder 3 is raised or lowered from the gap between the inner cylinder 1 and the outer cylinder 2 according to the required vertical distance between the radiation point source and the probe 18. The height of raising or lowering can be adjusted by referring to the scale 14 on the limit card 10. After adjustment, the device is then fitted onto the probe 18 through the lower opening 6 of the inner cylinder. Finally, the receiving cylinder 4 is installed, and the substance to be tested can be placed inside.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shelf for a high-purity germanium gamma spectrometer, comprising an inner cylinder (1), an outer cylinder (2), a height-adjustable inner cylinder (3), and a receiving cylinder (4), characterized in that: The inner cylinder (1) has openings at both the top and bottom, and a partition (5) is provided in the middle of the inner side of the inner cylinder (1). The lower opening (6) of the inner cylinder that can be fitted onto the probe (18) has an elastic structure. A retaining ring (7) is provided on the outer side of the middle part of the inner cylinder (1). The outer cylinder (2) is rotated and fitted onto the retaining ring (7) on the outer side of the middle part of the inner cylinder (1) through the retaining groove (8) on its lower inner side. An external thread is provided on the outer side of the upper opening (9) of the inner cylinder. The inner cylinder (3) is connected by... An inner thread matching the outer thread is fitted on the outside of the upper opening (9) of the inner cylinder. The upper left and right sides of the inner cylinder (2) are provided with limiting grooves (11). The left and right sides of the outer cylinder (3) are provided with limiting cards (10) corresponding to the limiting grooves (11) and the limiting cards (10) slide and connect in the limiting grooves (11). The top of the inner cylinder (3) is positioned and installed with a receiving cylinder (4) through a positioning groove (12) and a positioning card (13) is provided at the bottom of the outer edge of the receiving cylinder (4).

2. The shelf for a high-purity germanium gamma spectrometer according to claim 1, characterized in that: The limiting card (10) is provided with a scale (14).

3. The shelf for a high-purity germanium gamma spectrometer according to claim 1, characterized in that: The elastic structure includes a spiral-shaped limiting pad (15) and a limiting strip (16) arranged uniformly in a ring around the axis of the probe (18).

4. The shelf for a high-purity germanium gamma spectrometer according to claim 1, characterized in that: The outer side of the lower opening (6) of the inner cylinder is provided with anti-slip texture (17).

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