阅读说明：本技术 一种γ辐射探测器可移动轨道式实验平台 (Movable rail type experiment platform for gamma radiation detector ) 是由 石睿 庹先国 张松柏 罗庚 母湘樊 于 2020-12-07 设计创作，主要内容包括：本发明提供了一种能够实现单源或者混合放射源的不同距离、不同角度、不同移动速度的测试的γ辐射探测器可移动轨道式实验平台。该γ辐射探测器可移动轨道式实验平台包括底座以及支撑座,所述底座上设置有半圆形的滑槽；所述半圆形的滑槽的圆心位置设置有固定转轴；所述固定转轴上套装有转盘；底座的一端设置有延伸支撑台；延伸支撑台上方设置有驱动转盘转动的主动齿轮；延伸支撑台下方设置有驱动主动齿轮转动的驱动装置；所述转盘上设置有第一导轨；所述第一导轨上设置有滑台；滑台上方设置有竖向伸缩装置；所述竖向伸缩装置上方设置有夹紧装置。采用该γ辐射探测器可移动轨道式实验平台能够实时的调节放射源的位置,实现多维度对放射源进行检测。(The invention provides a movable rail type experimental platform of a gamma radiation detector, which can realize the test of different distances, different angles and different moving speeds of a single-source or mixed radioactive source. The movable rail type experiment platform of the gamma radiation detector comprises a base and a supporting seat, wherein a semicircular sliding groove is formed in the base; a fixed rotating shaft is arranged at the circle center position of the semicircular sliding groove; the fixed rotating shaft is sleeved with a turntable; an extension supporting platform is arranged at one end of the base; a driving gear for driving the rotary disc to rotate is arranged above the extension supporting table; a driving device for driving the driving gear to rotate is arranged below the extension supporting platform; a first guide rail is arranged on the turntable; a sliding table is arranged on the first guide rail; a vertical telescopic device is arranged above the sliding table; and a clamping device is arranged above the vertical telescopic device. The movable rail type experiment platform of the gamma radiation detector can adjust the position of the radioactive source in real time, and multi-dimensional detection of the radioactive source is realized.)

1. A gamma radiation detector movable rail type experiment platform is characterized in that: the device comprises a base (1) and a supporting seat (14), wherein a semicircular sliding groove (16) is formed in the base (1);

a fixed rotating shaft (3) is arranged at the circle center position of the semicircular sliding groove (16); the fixed rotating shaft (3) is sleeved with a turntable (7); an extension supporting table (2) is arranged at one end of the base (1); a driving gear (4) is arranged above the extension supporting platform (2);

a driving device (5) for driving the driving gear (4) to rotate is arranged below the extension supporting platform (2); a gear ring is arranged on the outer side of the rotary table (7); the driving gear (4) is meshed with a gear ring on the outer side of the rotary disc (7);

a first guide rail (8) is arranged on the turntable (7); a sliding shaft (81) is arranged below the first guide rail (8); the sliding shaft (8) is inserted into the sliding groove (16); the sliding shaft (8) is sleeved with a roller (82); the roller (82) is matched with the sliding groove (16);

one end of the first guide rail (8) is connected with the turntable (7); the other end is arranged on a supporting seat (14); the lower end of the supporting seat (14) is provided with a second roller (15);

a sliding table (9) is arranged on the first guide rail (8); a vertical telescopic device (10) is arranged above the sliding table (9); a clamping device (11) is arranged above the vertical telescopic device (10);

the clamping device (11) comprises a base plate (111); fixing plates (112) are arranged on two sides of the bottom plate (111);

a clamping groove is formed between the two fixing plates (112); two clamping plates (113) are arranged in the clamping groove; a radioactive source (12) is arranged between the two clamping plates (113);

the clamp plate (113) is provided with a guide post (114); the guide post (114) penetrates through the fixing plate (112); a locking bolt (115) is arranged on the fixing plate (112); the locking bolt (115) penetrates through the fixing plate (112) to tightly press the clamping plate (113); and a gamma radiation detector (6) is arranged at the central position above the fixed rotating shaft (3).

2. The gamma radiation detector movable rail-mounted experimental platform of claim 1, characterized in that: one end of the first guide rail (8) is provided with a second guide rail (13); one end of the second guide rail (13) is positioned on the supporting seat (14);

one side of one end of the second guide rail (13) is hinged with one side of one end of the first guide rail (8); an inserting block (132) is arranged on the other side of one end of the second guide rail (13); and a slot (81) matched with the insertion block (132) is formed in the other side of one end of the first guide rail (8).

3. The gamma radiation detector movable rail-mounted experimental platform of claim 2, wherein: scales are arranged on one side of each of the first rail (8) and the second rail (13).

4. The gamma radiation detector movable rail-mounted experimental platform of claim 3, characterized in that: the vertical telescopic device (10) adopts an electric push rod.

5. The gamma radiation detector movable rail-mounted experimental platform of claim 4, wherein: the second roller (15) adopts a universal wheel.

6. The gamma radiation detector movable rail-mounted experimental platform of claim 5, characterized in that: a cavity is arranged below the base (1).

7. The gamma radiation detector movable rail-mounted experimental platform of claim 6, characterized in that: the driving device (5) adopts a driving motor.

Technical Field

The invention relates to a detection device of a radioactive source, in particular to a movable rail type experiment platform of a gamma radiation detector.

Background

It is well known that: nuclide identification is used as an important technical means for early qualitative discrimination and detection of radioactivity, and plays an extremely important role in the nuclear safety fields of environmental radiation measurement, nuclear retirement, nuclear emergency, prevention of illegal transportation and leakage of nuclear materials and the like.

The gamma radiation detector is the main detection device for nuclide identification, and in practical situations, the radioactive substance to be detected is in an unknown state and position, and the gamma radiation detector needs to be calibrated and tested in advance.

The existing calibration method and equipment mainly adopt fixed-point standard radioactive source testing, have no uniform form, have no known movable gamma radiation detection experimental platform and lack an automatic, multidimensional and movable calibration experimental platform.

Disclosure of Invention

The invention aims to provide a movable rail type experimental platform of a gamma radiation detector, which can realize the test of different distances, different angles and different moving speeds of a single-source or mixed radioactive source.

The technical scheme adopted by the invention for solving the technical problems is as follows: a movable rail type experiment platform for a gamma radiation detector comprises a base and a supporting seat, wherein a semicircular sliding groove is formed in the base;

a fixed rotating shaft is arranged at the circle center position of the semicircular sliding groove; the fixed rotating shaft is sleeved with a turntable; an extension supporting table is arranged at one end of the base; a driving gear is arranged above the extending support platform;

a driving device for driving the driving gear to rotate is arranged below the extension supporting platform; a gear ring is arranged on the outer side of the rotary table; the driving gear is meshed with a gear ring on the outer side of the turntable;

a first guide rail is arranged on the turntable; a sliding shaft is arranged below the first guide rail; the sliding shaft is inserted into the sliding groove; the sliding shaft is sleeved with a roller; the roller is matched with the sliding groove;

one end of the first guide rail is connected with the turntable; the other end is arranged on the supporting seat; the lower end of the supporting seat is provided with a second roller;

a sliding table is arranged on the first guide rail; a vertical telescopic device is arranged above the sliding table; a clamping device is arranged above the vertical telescopic device;

the clamping device comprises a bottom plate; fixing plates are arranged on two sides of the bottom plate; a clamping groove is formed between the two fixing plates; two clamping plates are arranged in the clamping groove; a radioactive source is arranged between the two clamping plates;

the clamp plate is provided with a guide post; the guide post penetrates through the fixing plate; the fixed plate is provided with a locking bolt; the locking bolt penetrates through the fixing plate to tightly prop against the clamping plate; and a gamma radiation detector is arranged at the central position above the fixed rotating shaft.

Furthermore, one end of the first guide rail is provided with a second guide rail; one end of the second guide rail is positioned on the supporting seat;

one side of one end of the second guide rail is hinged with one side of one end of the first guide rail; an inserting block is arranged on the other side of one end of the second guide rail; and a slot matched with the insertion block is arranged on the other side of one end of the first guide rail.

Furthermore, scales are arranged on one sides of the first track and the second track.

Preferably, the vertical telescopic device adopts an electric push rod.

Preferably, the second roller is a universal wheel.

Further, a cavity is arranged below the base.

Preferably, the driving device adopts a driving motor.

The invention has the beneficial effects that: according to the movable rail type experiment platform for the gamma radiation detector, the rail capable of rotating along with the turntable is arranged, the sliding table is arranged on the rail, the vertical telescopic device is arranged on the sliding table, and the radioactive source is arranged above the telescopic device, so that the horizontal position of the radioactive source can be adjusted in real time, and the moving speed of the radioactive source and the height of the radioactive source can be adjusted; therefore, the radioactive source can be detected in multiple dimensions. Secondly, automatic detection and automatic calibration can be realized, and movable automatic detection is realized.

Drawings

Fig. 1 is a perspective view of a movable rail-type experimental platform of a gamma radiation detector in an embodiment of the invention;

FIG. 2 is a top view of a movable rail-type experimental platform of a gamma radiation detector in an embodiment of the present invention;

FIG. 3 is a front view of a movable rail-type experimental platform of a gamma radiation detector in an embodiment of the invention;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

FIG. 5 is a schematic illustration of a second rail deployment process in an embodiment of the present invention;

FIG. 6 is a perspective view of the second rail during deployment in an embodiment of the present invention;

FIG. 7 is a front view of the second track of an embodiment of the present invention after deployment;

FIG. 8 is a perspective view of the second rail of an embodiment of the present invention after deployment;

FIG. 9 is a schematic view of an adjustment angle of a guide rail according to an embodiment of the present invention;

FIG. 10 is an enlarged view of a portion B of FIG. 1;

FIG. 11 is an enlarged view of a portion C of FIG. 4;

FIG. 12 is a schematic diagram of an experiment with different distances according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of different angle detection in an embodiment of the present invention;

FIG. 14 is an experimental schematic diagram of a mobile source according to an embodiment of the present invention;

the following are marked in the figure: the device comprises a base 1, an extension supporting table 2, a fixed rotating shaft 3, a driving gear 4, a driving device 5, a radiation detector 6-gamma, a rotary table 7, a sliding shaft 8, a sliding table 9, a vertical telescopic device 10, a clamping device 11, a radiation source 12, a second guide rail 13, a supporting seat 14 and a second roller 15.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in fig. 1 to 11, the movable rail-mounted experimental platform for a gamma radiation detector according to the present invention includes a base 1 and a supporting base 14, wherein the base 1 is provided with a semicircular sliding groove 16;

a fixed rotating shaft 3 is arranged at the circle center position of the semicircular sliding groove 16; the fixed rotating shaft 3 is sleeved with a turntable 7; an extension supporting platform 2 is arranged at one end of the base 1; a driving gear 4 is arranged above the extension supporting platform 2;

a driving device 5 for driving the driving gear 4 to rotate is arranged below the extension supporting platform 2; a gear ring is arranged on the outer side of the rotary table 7; the driving gear 4 is meshed with a gear ring on the outer side of the rotary table 7;

a first guide rail 8 is arranged on the turntable 7; a sliding shaft 81 is arranged below the first guide rail 8; the sliding shaft 8 is inserted into the sliding groove 16; the sliding shaft 8 is sleeved with a roller 82; the roller 82 is matched with the sliding chute 16;

one end of the first guide rail 8 is connected with the turntable 7; the other end is arranged on a supporting seat 14; the lower end of the supporting seat 14 is provided with a second roller 15;

a sliding table 9 is arranged on the first guide rail 8; a vertical telescopic device 10 is arranged above the sliding table 9; a clamping device 11 is arranged above the vertical telescopic device 10;

the clamping device 11 comprises a base plate 111; fixing plates 112 are arranged on two sides of the bottom plate 111;

a clamping groove is formed between the two fixing plates 112; two clamping plates 113 are arranged in the clamping grooves; a radioactive source 12 is arranged between the two clamping plates 113;

the clamp plate 113 is provided with a guide post 114; the guide posts 114 pass through the fixing plate 112; the fixing plate 112 is provided with a locking bolt 115; the locking bolt 115 penetrates through the fixing plate 112 to tightly press the clamping plate 113; and a gamma radiation detector 6 is arranged at the central position above the fixed rotating shaft 3.

In the application process, firstly, a radioactive source 12 is arranged above a vertical telescopic device 10 through a clamping device 11; then, the height of the radioactive source 12 is adjusted through the vertical telescopic device 10, so that the height of the radioactive source 12 is flush with the gamma radiation detector 6;

then, the sliding table 9 is controlled to move, so that the moving detection is realized, and the detection of each measuring point is realized by controlling the moving distance and the staying time of the sliding table 10;

secondly, can realize the rotation drive to carousel 7 through drive arrangement 5 drive driving gear 4 to realize the regulation of radiation source detection angle.

In mounting the radiation source 12 to the clamping device 11, the radiation source 12 is first placed between the two clamping plates 113, and then the clamping plates 113 clamp the radiation source 12 by tightening the locking bolts 115.

During the detection of the radioactive source 12, the detection can be performed by:

1. performing experiments on different source distances and different measurement times of a single source;

by using¹³⁷Cs、⁶⁰Co、¹³³Ba、¹⁵²Eu、¹⁵⁵Eu and other standard sources, designing experiments of different distances between a radioactive source 12 and the end face of a detector, preliminarily planning a distance from 10cm to 1m, and measuring points at intervals of 10cm, as shown in figure 12; and then carrying out experiments of different measurement time at each point position.

2. Performing experiments on different distances of the mixed source;

combining single sources into a mixed source to carry out different distance experiments, setting the radiation source 12 as a mixed source, e.g.¹³⁷Cs+⁶⁰Co、¹³⁷Cs+⁶⁰Co+¹³³Ba、¹³⁷Cs+⁶⁰Co+¹³³Ba+¹⁵²Eu、¹³⁷Cs+⁶⁰Co+¹³³Ba+¹⁵²Eu+¹⁵⁵Eu, and the like.

3. Carrying out experiments at different angles;

performing single-source and mixed-source experiments at different angles (such as 15 degrees) at different vertical distances from the surface of the gamma radiation detector 6; as shown in fig. 13.

4. A mobile source experiment;

the measurement experiment of the moving source is carried out according to different moving speeds and different moving paths, and is also divided into the single-source and mixed-source cases, and the experimental schematic diagram is shown in fig. 14.

In order to facilitate storage and placement, a second guide rail 13 is further arranged at one end of the first guide rail 8; one end of the second guide rail 13 is positioned on the supporting seat 14;

one side of one end of the second guide rail 13 is hinged with one side of one end of the first guide rail 8; the other side of one end of the second guide rail 13 is provided with an insertion block 132; the other side of one end of the first guide rail 8 is provided with a slot 81 matched with the insertion block 132.

In order to facilitate accurate verification of the position, further, scales are arranged on one sides of the first track 8 and the second track 13.

For the convenience of control, it is preferable that the vertical telescopic device 10 is an electric push rod.

In order to facilitate the movement of the supporting seat 14, it is preferable that the second roller 15 is a universal wheel.

In order to reduce the mass of the base 1, further, a cavity is arranged below the base 1.

For the convenience of control, it is preferable that the driving device 5 employs a driving motor.