CN218383318U

CN218383318U - Sample positioning bracket for high-purity germanium gamma energy spectrometer

Info

Publication number: CN218383318U
Application number: CN202221799125.1U
Authority: CN
Inventors: 李奎; 杨云福; 周景华; 罗行行; 王咸居; 吴梦云; 谭秀洪
Original assignee: CHONGQING CENTER FOR DISEASE CONTROL AND PREVENTION
Current assignee: CHONGQING CENTER FOR DISEASE CONTROL AND PREVENTION
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2023-01-24
Anticipated expiration: 2032-07-13

Abstract

The utility model provides a sample positioning bracket for a high-purity germanium gamma energy spectrometer, which comprises a barrel body sleeved on a probe, wherein a blocking part is arranged in the barrel body and is vertical to the axis of the barrel body; the inside region that just is located the probe top of barrel is used for holding waiting to examine the sample, waits to examine sample and barrel inner wall and is the close clearance fit, waits to examine the sample lower extreme and supports to lean on the fender portion upper wall. The utility model discloses guaranteed as far as possible that the sample is unanimous/coaxial with the geometry of probe, only need very simple, light operating procedure can accomplish the sample smoothly and place, conveniently place the sample on the probe fast, accurately, saved the process of adjusting the sample position tediously, only need the time of less than ten seconds just can place the sample, can also prevent that the sample from landing, has the advantage of conveniently getting the put locator simultaneously.

Description

Sample positioning bracket for high-purity germanium gamma energy spectrometer

Technical Field

The utility model relates to a high-purity germanium gamma energy spectrometer especially relates to a sample positioning support for high-purity germanium gamma energy spectrometer.

Background

The high-purity germanium gamma spectrometer is suitable for measuring activity of radioactive nuclide which emits gamma ray in decay, and can be used in solid and liquid substances with different geometric shapes ⁴⁰ K、 ⁶⁰ Co、 ¹³⁷ The method comprises the steps of identifying and quantitatively analyzing Cs and other nuclides, emitting gamma rays with different energies in the decay process of different nuclides, detecting the gamma rays by a high-purity germanium gamma energy spectrometer, screening the energy, displaying the gamma rays in the form of an energy spectrogram, and analyzing the energy spectrogram to obtain corresponding nuclide information. In the application process, a columnar sample box with the diameter close to that of the detector is generally selected when high-density substances (such as soil, cement, coal cinder and the like) are measured, and an inverted concave type Ma Linbei with the concave diameter close to that of the detector is selected as low-density substances (such as water, vegetables, grains and the like).

On the basis of qualitative analysis, when a sample to be detected (a cylindrical box or Ma Linbei with a detected object in the box) is quantitatively analyzed, the geometric shape condition of the sample to be detected is consistent, the distance between the sample and the top end of a probe (the cylindrical probe) is also consistent, and the error caused by manually placing the sample to be detected under the condition of no support fixation is large. In an ideal state, a sample is placed at the top end of the probe and is coaxial with the columnar detector, so that the distance between the sample and the columnar detector is shortest, the maximum detection efficiency is obtained, and the measurement efficiency and the result accuracy are improved.

Because the probe of the high-purity germanium gamma energy spectrometer is a smooth cylindrical structure, at present, inspectors are troublesome when placing and adjusting the position of a sample to be detected, the sample to be detected slides off easily and even slides off, the sample to be detected and the probe cannot be coaxial, the coaxiality of the sample to be detected and the probe needs to be adjusted for a long time, and the short time is half a minute, and the long time is several minutes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sample positioning support for high-purity germanium gamma energy spectrometer can prevent the sample landing that awaits measuring at least, guarantees the sample that awaits measuring and the coaxial placing of probe, avoids the sample that awaits measuring to put partially.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

A sample positioning support for a high-purity germanium gamma energy spectrometer is characterized in that: the probe comprises a barrel body sleeved on a probe, wherein a blocking part is arranged in the barrel body and is vertical to the axis of the barrel body; the inside region that just is located the probe top of barrel is used for holding waiting to examine the sample, waits to examine sample and barrel inner wall and is the close clearance fit, waits to examine the sample lower extreme and supports to lean on the fender portion upper wall. The small gap of the utility model means that the gap is not more than 1mm.

Preferably, a thin plate integrally formed with the cylinder is used as the stopper, so that the liquid sample can be prevented from leaking and the probe can be protected from contamination.

As another preferred scheme, adopt with barrel integrated into one piece's annular boss is as the fender portion, and the annular boss internal diameter is less than the external diameter of examining examination sample and probe, and structure like this makes gamma ray more act on examining the sample more easily, more is favorable to detecting.

Furthermore, a plurality of axially arranged wing blades are arranged on the outer wall of the cylinder body, the outer edges of all the wing blades are positioned on the circumference of the same cone frustum, and the wing blades can be just clamped into the groove of Ma Linbei, so that the structure is suitable for Marlin cup detection.

Preferably, the cylinder can be arranged in a Marlin cup, and the outer edge of the wing blade is in small clearance fit with the inner wall of Ma Linbei.

Preferably, the upper part and the lower part of the outer wall of the cylinder body are respectively provided with wing blades in opposite directions, and the outer edges of all the upper wing blades and the outer edges of all the lower wing blades form a waist-shaped structure together.

Treat sample and locating support for more convenient getting is put on the barrel and be located and be provided with annular bellying between the wing leaf on upper portion and the wing leaf of lower part.

For more convenient use, the barrel is formed by mutually inserting or bonding an upper barrel section and a lower barrel section, and the lower end of the upper barrel section and the upper end of the lower barrel section are both perpendicular to the axis of the barrel. By adopting the structure, the upper section of the cylinder body and the lower section of the cylinder body after being disassembled can be respectively used as the positioning support of the Marlin cup, and the universality is better.

Has the advantages that: the utility model, through inserting the sample and the probe in the cylinder of the positioning bracket, ensures the geometric shape of the sample and the probe to be consistent/coaxial as much as possible, can smoothly complete the sample placement only by very simple and easy operation steps, is convenient to rapidly and accurately place the sample on the probe, saves the complicated process of adjusting the position of the sample, can place the sample in less than ten seconds, can also prevent the sample from slipping off, and has the advantage of conveniently taking and placing the positioning bracket; the utility model discloses simple structure, low in manufacturing cost.

Drawings

FIG. 1 is a perspective view of a sample positioning support for a high-purity germanium gamma spectrometer in example 1;

FIG. 2 is a perspective view of a sample positioning holder for a high-purity germanium gamma spectrometer in example 1;

FIG. 3 is a cross-sectional view of the sample positioning holder for high-purity Ge gamma spectrometer in example 1;

fig. 4 is an exploded view of the sample positioning bracket for the high-purity ge gamma spectrometer in the embodiment 1 in use;

FIG. 5 is a cross-sectional view of the sample positioning holder for high purity Ge gamma spectrometer in example 2;

FIG. 6 is a cross-sectional view of the sample positioning holder for high purity Ge gamma spectrometer in example 3;

FIG. 7 is a perspective view of a sample positioning holder for a high-purity Ge gamma spectrometer in example 6;

fig. 8 is a cross-sectional view of the sample positioning support for high-purity ge gamma spectrometer in example 6.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 to 4, a sample positioning bracket for a high-purity germanium gamma energy spectrometer comprises a cylinder body 1 sleeved on a probe 2, wherein the probe 2 is cylindrical, a blocking part 8 is specifically arranged in the cylinder body 1, the blocking part 8 is vertical to the axis of the cylinder body 1, the inner wall of the cylinder body 1 sleeved on the probe 2 is in small clearance fit with the probe 2 (the clearance amount is not more than 1 mm), and the top wall of the probe 2 abuts against the lower wall of the blocking part 8; the inside region that just is located 2 tops of probe of barrel 1 is used for holding waiting to examine sample 3, waits to examine

sample

3 and 1 inner walls of barrel and is little clearance fit (the clearance volume is not more than 1 mm), waits to examine 3 lower extremes of sample and supports to lean on 8 upper walls of fender portion.

In this embodiment: an annular boss which is integrally formed with the cylinder body 1 is used as the blocking part 8, the inner diameter of the annular boss is smaller than the outer diameters of the sample 3 to be detected and the probe 2, and the blocking part 8 is a baffle plate with a through hole 7.

In this embodiment: the upper part and the lower part of the outer wall of the barrel body 1 are respectively provided with three wing blades 4 in opposite directions, the outer edges of all the upper wing blades 4 and the outer edges of all the lower wing blades 4 jointly form a kidney-shaped structure, and the outer edges of all the upper wing blades 4 are positioned on the circumference of the same cone frustum.

In this embodiment: an annular convex part 6 is arranged on the barrel 1 and between the upper wing blade 4 and the lower wing blade 4.

Example 2

A sample positioning bracket for a high-purity germanium gamma energy spectrometer is disclosed in reference to example 1, and the main difference from the example 1 is as follows: as shown in fig. 5, a baffle (wall thickness of 1 mm) formed integrally with the cylindrical body 1 is used as the stopper 8, and the inner cavity of the cylindrical body 1 is divided into two parts by the baffle. The inner chamber of 8 tops in the barrel 1 is used for holding waiting to examine sample 3, and the inner chamber of 8 below in the barrel 1 is used for the cover to establish probe 2.

Example 3

A sample positioning bracket for a high-purity germanium gamma energy spectrometer is disclosed in reference to example 1, and the main difference from the example 1 is as follows: as shown in fig. 6, the cylinder 1 is formed by bonding an upper cylinder section and a lower cylinder section together, and the lower end of the upper cylinder section and the upper end of the lower cylinder section are both perpendicular to the axis of the cylinder 1, and the cylinder 1 in example 1 is substantially transversely split into two sections, the cross section is located on the blocking part 8, the total wall thickness of the blocking part 8 is 6mm, and the wall thickness of the blocking part 8 after being split is 3mm each.

Example 4

A sample positioning support for a high-purity germanium gamma energy spectrometer, which is different from example 3 mainly in that: adopt threaded connection mode, annular bulge 6 adopts the internal thread sleeve, and the upper portion of barrel upper segment has the external screw thread, and the upper portion of barrel hypomere also has the external screw thread, and barrel upper segment, barrel hypomere all are screw-thread fit with the internal thread sleeve.

Example 5

A sample positioning support for a high-purity germanium gamma energy spectrometer, which is different from example 3 mainly in that: the upper section of the barrel body and the lower section of the barrel body are mutually spliced together, specifically, the lower end of the upper section of the barrel body can be provided with an insertion hole, the upper end of the lower section of the barrel body is provided with a bolt, and the lower section of the barrel body are connected together in a splicing connection mode.

Example 6

A sample positioning support for a high-purity germanium gamma energy spectrometer, which is different from the sample positioning support in embodiment 3 mainly in the following points, with reference to any one of embodiments 2 to 4: the upper section or the lower section of the cylinder can be arranged in the marlin cup 5, the outer edge of the wing blade 4 is in small clearance fit with the inner wall of the marlin cup 5 (the clearance is less than 1 mm), the structure of the lower section of the cylinder after being assembled with the probe 2 and the marlin cup 5 is schematically shown in figures 7 and 8, the lower section of the cylinder is actually buckled on the probe 2, and Ma Linbei is buckled on the lower section of the cylinder.

The sample and the probe are inserted into the barrel of the positioning bracket, so that the geometric shapes of the sample and the probe are consistent/coaxial as far as possible, the sample can be smoothly placed only by simple and easy operation steps, the operation of loading and sampling takes less than ten seconds, the sample can be conveniently and quickly and accurately placed on the probe, the complicated process of adjusting the position of the sample is omitted, the sample can be placed in less than ten seconds, the sample can be prevented from sliding off, and meanwhile, the positioning bracket has the advantage of being convenient to take and place; in addition, the positioning bracket has simple structure and low manufacturing cost.

It should be noted that, the high-purity germanium gamma energy spectrometer and the probe thereof belong to the prior art, and are not described in detail in this application.

Claims

1. A sample positioning support for a high-purity germanium gamma energy spectrometer is characterized in that: the probe comprises a barrel body (1) sleeved on a probe (2), wherein a blocking part (8) is arranged in the barrel body (1), the blocking part (8) is vertical to the axis of the barrel body (1), the inner wall of the barrel body (1) sleeved on the probe (2) is in small clearance fit with the probe (2), and the top wall of the probe (2) is abutted against the lower wall of the blocking part (8); barrel (1) is inside and be located the region of probe (2) top and be used for holding waiting to examine sample (3), waits to examine sample (3) and barrel (1) inner wall and is little clearance fit, waits to examine sample (3) lower extreme and supports to lean on fender portion (8) upper wall.

2. The sample positioning rack of claim 1, wherein: a thin plate integrally formed with the cylinder (1) is used as the stopper (8).

3. The sample positioning rack of claim 1, wherein: adopt with barrel (1) integrated into one piece's annular boss does keep off portion (8), and annular boss internal diameter is less than the external diameter of waiting to examine sample (3) and probe (2).

4. A sample positioning support according to any of claims 1 to 3, in which: the outer wall of the cylinder body (1) is provided with a plurality of axially arranged wing blades (4), and the outer edges of all the wing blades (4) are positioned on the circumference of the same cone frustum.

5. The sample positioning rack of claim 4, wherein: the cylinder body (1) can be arranged in the tourmaline cup sample (5), and the outer edges of the wing leaves (4) are in small clearance fit with the inner wall of the tourmaline cup sample (5).

6. The sample positioning rack of claim 4, wherein: the upper part and the lower part of the outer wall of the barrel body (1) are respectively provided with wing blades (4) in opposite directions, and the outer edges of all the upper wing blades (4) and the outer edges of all the lower wing blades (4) are communicated to form a waist-shaped structure.

7. The sample positioning rack of claim 6, wherein: an annular bulge (6) is arranged on the cylinder (1) and between the upper wing blade (4) and the lower wing blade (4).

8. The sample positioning rack of claim 6, wherein: the barrel (1) is formed by mutually inserting or bonding an upper barrel section and a lower barrel section, and the lower end of the upper barrel section and the upper end of the lower barrel section are both vertical to the axis of the barrel (1).

9. The sample positioning rack of claim 7, wherein: the annular bulge (6) is a threaded sleeve.