A beta source activity detection instrument

Abstract

The application relates to the technical field of particulate matter monitoring, and discloses a beta radioactive source radioactivity detection instrument, which comprises an L-shaped shell, an opening is formed in the top of the shell, a U-shaped protective cover is hinged to the opening, a touchable display panel for displaying radioactivity information is fixedly installed at the top of the shell, and two detection tables are arranged in the shell. The beta radioactive source radioactivity detection instrument is convenient for workers to replace the beta radioactive source on the other detection table when the equipment is used to detect the beta radioactive source installed on one of the detection tables, solves the problem that the equipment needs to wait for the workers to replace the beta radioactive source after one round of beta radioactive source detection is completed before the next round of detection work is carried out, causes time waste, reduces work efficiency, has the function of synchronous feeding and discharging, and further improves the functionality and practicability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of particulate matter monitoring technology, specifically to a beta-radioactive source radioactivity detection instrument. Background Technology

[0002] Chinese invention patent CN114609660A discloses a beta-radioactive source emissivity detection instrument. By using a rotating motor to drive rotation and a photoelectric switch for positioning, the emitting surface of a beta-radioactive source can be opened or partially blocked. This allows beta-ray detectors to detect both the complete emitting surface of a beta-radioactive source and the equally divided emitting surface of a single beta-radioactive source. Multiple beta-ray detectors receive beta rays and output standard TTL signals to a microcontroller on the main control board. The signal processing circuit calculates the emissivity of the beta-radioactive source surface and displays the data on a screen. This invention can automatically measure the emissivity and uniformity of the beta-radioactive source surface.

[0003] In related technologies, existing radioactivity detection instruments typically require manual placement of the β-radioactive source to be tested on a retractable storage rack when testing β-radioactive sources. The testing can then be performed by pushing the rack into the equipment. However, in actual operation, it has been found that after testing a batch of β-radioactive sources, the equipment needs to replace the β-radioactive sources promptly to improve work efficiency. This process is too rushed, and the equipment needs to stop working when replacing β-radioactive sources, lacking a synchronous loading and unloading function. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a β-radioactive source emissivity detection instrument. By setting up two detection stations, it is convenient for the equipment to perform β-radioactive source testing on one detection station while the operator replaces the β-radioactive source on the other detection station. This avoids the problem of wasting time and reducing work efficiency by waiting for the operator to replace the β-radioactive source after one round of β-radioactive source testing before proceeding to the next round of testing.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a β-radioactive source emissivity detection instrument, comprising an L-shaped housing, an opening at the top of the housing, and a U-shaped protective cover hinged to the opening; a touch-sensitive display panel for displaying emissivity information is fixedly installed on the top of the housing; two detection stages are arranged inside the housing, and several positioning seats are fixedly connected to the top of each of the two detection stages, with a β-radioactive source disposed inside each of the two sets of positioning seats; a drive assembly for reciprocating drive of the two detection stages is arranged inside the housing, and the two drive ends of the drive assembly are respectively connected to the two detection stages; a guide for position switching of the two detection stages is arranged inside the housing; a lifting plate is slidably connected to the housing, and the lifting plate is located above the guide; a detection assembly for detecting the emissivity of the β-radioactive source is arranged on the lifting plate; and an adjustment assembly for adjusting the height of the lifting plate is arranged inside the housing.

[0008] Preferably, the driving assembly includes two sliding blocks slidably connected to the bottom of the inner wall of the housing, each of the two sliding blocks having an L-shaped frame slidably connected to its top, and each of the two L-shaped frames having a guide rod fixedly connected to its top, with the top ends of the two guide rods respectively fixedly connected to the bottom of the two detection stages. The housing is provided with a driving component for reciprocating driving of the two sliding blocks.

[0009] Preferably, the driving component includes two threaded rods rotatably connected inside the housing, and the two threaded rods are symmetrically arranged. The two threaded rods are respectively connected to the internal threads of two sliding blocks. A pulley is fixedly connected to the outer surface of one end of each of the two threaded rods. The two pulleys are connected by belt drive. A first motor is fixedly connected to the back of the housing, and the output shaft of the first motor is fixedly connected to one end of one of the threaded rods.

[0010] Preferably, the guide member includes a guide plate fixed inside the housing, and the guide plate has a guide groove inside. A circular plate is fixedly connected to the bottom of the inner wall of the housing by a bracket, and the circular plate is located inside the guide groove. Both guide rods are slidably connected inside the guide groove.

[0011] Preferably, the detection component includes several through holes opened inside the lifting plate and several beta-ray detectors fixed to the top of the lifting plate by brackets. The receiving surfaces of the beta-ray detectors face downward and are concentric with the corresponding through holes.

[0012] Preferably, the lifting plate has a movable groove inside, and each movable groove is connected to several through holes. A circular adjusting plate is rotatably connected inside the movable groove. A rotating component for adjusting the rotation of the adjusting plate is provided on the top of the lifting plate. Several auxiliary holes are provided inside the adjusting plate, and several dispersion holes are provided on one side of the several auxiliary holes.

[0013] Preferably, the rotating component includes a rotating shaft rotatably connected inside the movable groove. The outer surface of the rotating shaft is fixedly connected to the interior of the adjusting plate. The top end of the rotating shaft extends to the top of the lifting plate. A second motor is fixedly connected to the top of the lifting plate via a bracket. The output shaft of the second motor is fixedly connected to the top end of the rotating shaft.

[0014] Preferably, the adjusting assembly includes a bidirectional lead screw rotatably connected inside the housing, both ends of the bidirectional lead screw extending to the outside of the housing, and threaded blocks threadedly connected to the outer surfaces of both ends of the bidirectional lead screw. The tops of the two threaded blocks are slidably connected to the top of the inner wall of the housing, and drive frames are hinged to the bottoms of the two threaded blocks. The bottoms of the two drive frames are hinged to the top of the lifting plate.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides a β-radiation source emissivity detection instrument, which has the following beneficial effects:

[0017] 1. This invention, by setting up two testing stations, facilitates the replacement of the β-radiation source on the other testing station while the equipment is testing the β-radiation source installed on one testing station. This avoids the waste of time and reduced work efficiency caused by waiting for the operator to replace the β-radiation source after one round of β-radiation source testing is completed. The drive component allows the two testing stations to be guided along the trajectory of the guide, which facilitates the switching of the two testing station positions and improves the convenience of loading and unloading. It also has the function of synchronous loading and unloading, further improving the functionality and practicality of the equipment.

[0018] 2. This invention uses irregularly shaped holes for the dispersion holes to facilitate the collection of beta rays from irregular surfaces and different emission surfaces of the beta radiation source by the beta ray detector, thereby improving the detection effect. The rotating component can drive the adjustment plate to rotate and adjust, and can drive the auxiliary holes and irregular dispersion holes to change positions, thus enabling the conversion of different detection methods.

[0019] 3. The present invention extends both ends of the bidirectional lead screw to the outside of the housing, so that the operator can control the rotation of the bidirectional lead screw by hand. The rotation of the bidirectional lead screw can drive the two threaded blocks to move relative to or away from each other, which in turn can drive the two drive frames to move in a fan shape, and then drive the lifting plate to move up and down, so as to realize the height adjustment of the detection component, meet the detection work at different heights, and further improve the detection effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the unfolded state of the present invention;

[0022] Figure 3 For the present invention Figure 1 Schematic diagram of the middle shell structure;

[0023] Figure 4 For the present invention Figure 3 A cross-sectional side view of the inner shell;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of the structure of the lifting plate;

[0025] Figure 6 For the present invention Figure 5 Structural bottom view of the middle lifting platform;

[0026] Figure 7 For the present invention Figure 4 A cross-sectional schematic diagram of the lifting plate;

[0027] Figure 8 For the present invention Figure 7 Top view of the structure of the middle adjustment plate;

[0028] Figure 9 For the present invention Figure 3 A schematic diagram of the combination of the guide component and the drive assembly;

[0029] Figure 10 For the present invention Figure 9 Structural bottom view;

[0030] Figure 11 For the present invention Figure 9 A schematic diagram of the structure of the drive component;

[0031] Figure 12 For the present invention Figure 9 Bottom view of the structure of the guide component.

[0032] In the diagram: 1. Housing; 2. U-shaped protective cover; 3. Touchscreen display panel; 4. Detection table; 5. Positioning seat; 6. β-radiation source; 7. Drive assembly; 71. Sliding block; 72. L-shaped frame; 73. Guide rod; 74. Threaded rod; 75. Pulley; 76. First motor; 8. Lifting plate; 9. Detection assembly; 91. Through hole; 92. β-ray detector; 93. Movable groove; 94. Adjusting plate; 95. Auxiliary hole; 96. Dispersion hole; 97. Rotating shaft; 98. Second motor; 10. Adjusting assembly; 101. Bidirectional lead screw; 102. Threaded block; 103. Drive frame; 11. Guide plate; 12. Guide groove; 13. Circular plate; 14. Baffle; 15. Conical gravity block; 16. Actuating frame. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] See attached document Figure 1-12 A beta radiation source emissivity detection instrument includes an L-shaped housing 1 with an opening at the top and a U-shaped protective cover 2 hinged to the opening. A touch-sensitive display panel 3 for displaying emissivity information is fixedly installed on the top of the housing 1. Two detection platforms 4 are arranged inside the housing 1. Several positioning seats 5 are fixedly connected to the top of each of the two detection platforms 4, and a beta radiation source 6 is arranged inside each of the two sets of positioning seats 5. A drive assembly 7 for reciprocating drive of the two detection platforms 4 is arranged inside the housing 1, and the two drive ends of the drive assembly 7 are respectively connected to the two detection platforms 4. A guide for position switching of the two detection platforms 4 is arranged inside the housing 1. A lifting plate 8 is slidably connected to the housing 1 and is located above the guide. A detection assembly 9 for detecting the emissivity of the beta radiation source 6 is arranged on the lifting plate 8. An adjustment assembly 10 for adjusting the height of the lifting plate 8 is arranged inside the housing 1.

[0036] By setting up two testing stations 4, it is convenient for the equipment to perform testing on the β-radiation source 6 installed on one testing station 4 while the staff replaces the β-radiation source 6 on the other testing station 4. This avoids the equipment having to wait for the staff to replace the β-radiation source 6 after one round of testing before it can start the next round of testing, which would waste time and reduce work efficiency.

[0037] By setting the drive component 7, the two inspection tables 4 can be driven to follow the trajectory of the guide to facilitate the switching of the positions of the two inspection tables 4, improve the convenience of loading and unloading, and have the function of synchronous loading and unloading, further improving the functionality and practicality of the equipment. Synchronous control of loading and unloading can be formed through a single drive source, reducing the cost of the equipment and having the function of energy saving and environmental protection.

[0038] See attached document Figure 3-4 , Figure 9 and Figure 11 A baffle 14 is slidably connected to the top of one side of the housing 1, and a conical gravity block 15 is fixedly connected to the bottom of the baffle 14. A toggle frame 16 is fixedly connected to both sides of the top of the two detection platforms 4.

[0039] The cone-shaped gravity block 15, by its own weight, can drive the baffle 14 to move downward, thereby blocking the feeding port of the housing 1. The tops of the two detection platforms 4 are equipped with actuating frames 16, and the bottom of the cone-shaped gravity block 15 is provided with a cone shape. This allows the detection platform 4 to drive the actuating frames 16 to move, which can squeeze the inclined surface of the cone-shaped gravity block 15, thereby causing the cone-shaped gravity block 15 to move upward. Ultimately, this achieves the automatic opening of the baffle 14, which has the function of automatic closing and opening, and does not require an additional drive source for control, thus improving the feeding effect.

[0040] See attached document Figure 10-11 The drive assembly 7 includes two sliding blocks 71 slidably connected to the bottom of the inner wall of the housing 1. The top of each of the two sliding blocks 71 is slidably connected to an L-shaped frame 72, and the top of each of the two L-shaped frames 72 is fixedly connected to a guide rod 73. The top of each of the two guide rods 73 is fixedly connected to the bottom of the two detection tables 4 respectively. The housing 1 is provided with a drive component for reciprocating drive of the two sliding blocks 71.

[0041] The relative movement of the two sliding blocks 71 can drive the two L-shaped frames 72 to move in the corresponding direction, and then the two guide rods 73 can drive the two detection tables 4 to perform position switching. Moreover, the setting of the guide members improves the smoothness of the position switching of the two detection tables 4 and avoids the problem of mutual obstruction between the two detection tables 4 during position switching.

[0042] By having two L-shaped frames 72 slidably connected to the top of the sliding block 71, it is not only convenient for the two sliding blocks 71 to drive the L-shaped frames 72 to move laterally, but also to move longitudinally, thereby facilitating the movement of the two guide rods 73 according to the trajectory of the guide.

[0043] See attached document Figure 10-11The driving component includes two threaded rods 74 rotatably connected inside the housing 1, and the two threaded rods 74 are symmetrically arranged. The two threaded rods 74 are respectively connected to the internal threads of two sliding blocks 71. A pulley 75 is fixedly connected to the outer surface of one end of each of the two threaded rods 74. The two pulleys 75 are connected by belt drive. A first motor 76 is fixedly connected to the back of the housing 1. The output shaft of the first motor 76 is fixedly connected to one end of one of the threaded rods 74.

[0044] The first motor 76 is connected to an external power source and control switch. It is a forward and reverse reversible motor and is set up using existing connection and coding methods. It is used to drive one of the threaded rods 74 to rotate. Since the two threaded rods 74 are connected by a pulley 75 and a belt drive, when the threaded rod 74 rotates, it can synchronously drive the other threaded rod 74 to rotate, thus forming synchronous rotation operation.

[0045] The two threaded rods 74 are symmetrically arranged so that when they rotate, they can drive the two sliding blocks 71 to move in opposite or opposite directions, which facilitates the position switching of the two detection tables 4 in conjunction with the guide.

[0046] See attached document Figure 2 , Figure 4 , Figure 9-10 and Figure 12 The guide includes a guide plate 11 fixed inside the housing 1, and a guide groove 12 is provided inside the guide plate 11. A circular plate 13 is fixedly connected to the bottom of the inner wall of the housing 1 by a bracket, and the circular plate 13 is located inside the guide groove 12. Both guide rods 73 are slidably connected inside the guide groove 12.

[0047] The circular plate 13 is located inside the guide groove 12, making the guide groove 12 a circular groove, with extended grooves on both sides of the circular groove. The specific shape can be found in the reference. Figure 12 As shown;

[0048] The circular grooves facilitate the symmetrical sliding of the two guide rods 73 in the drive assembly 7, enabling the switching of the positions of the two detection stages. Furthermore, the two extended grooves facilitate the movement of the two detection stages to the detection position and the material change position by the two guide rods 73, further improving their working efficiency.

[0049] See attached document Figure 5-8 The detection component 9 includes several through holes 91 opened inside the lifting plate 8 and several beta-ray detectors 92 fixed to the top of the lifting plate 8 by brackets. The receiving surfaces of the beta-ray detectors 92 face downward and are concentric with the corresponding through holes 91.

[0050] The beta ray detector 92 is an instrument used in the prior art to detect the emissivity of the beta radiation source 6. The beta radiation source 6 located inside the positioning seat 5 can be collected and processed by the beta ray detector 92 through the through hole 91, and converted into a TTL signal and sent to the main control board set in the housing 1. After the collection is completed, its surface emissivity is calculated and the measurement result is displayed on the touch display panel 3.

[0051] The working principle of the β-radiation source emissivity detection instrument of the present invention is as follows:

[0052] S1. The β-radiation source 6 to be detected is placed in the positioning seat 5 on the detection stage 4. By starting the first motor 76 in the drive assembly 7, one of the threaded rods 74 can be driven to rotate. Since the two threaded rods 74 are connected by a pulley 75 and a belt drive, when the threaded rod 74 rotates, it can drive the other threaded rod 74 to rotate synchronously, forming synchronous rotation work. Moreover, since the two threaded rods 74 are symmetrically arranged, when the two threaded rods 74 rotate, they can drive the two sliding blocks 71 to move in opposite or opposite directions.

[0053] S2. Driven by the relative or disjoint directions of the two sliding blocks 71, the two L-shaped frames 72 can drive the two guide rods 73 to move along the trajectory of the guide groove 12 in the guide member. Ultimately, the positions of the detection table 4 located outside the equipment and the detection table 4 inside the equipment can be switched, so that the detection table 4 with the β radiation source 6 is moved to the inside of the equipment, and the detection table 4 without the β radiation source 6 or the detection table 4 after the β radiation source 6 detection is completed is moved to the outside. At this time, the equipment can form a new round of β radiation source 6 detection work, and at the same time, the staff can replace the β radiation source 6 on another detection table 4.

[0054] S3. During testing, the adjustment component 10 is driven by hand to control the height of the lifting plate 8, thereby adjusting the height of the detection component 9. Finally, several β-ray detectors 92 in the detection component 9 can collect and process the β-radiation source 6 located inside the positioning seat 5 through the through hole 91, and convert it into a TTL signal and send it to the main control board located in the housing 1. After the collection is completed, its surface emissivity is calculated and the measurement results are displayed on the touch display panel 3. After the test is completed, S1-S3 are installed in sequence to form a cyclical test.

[0055] Example 2: The difference from Example 1 is that;

[0056] See attached document Figure 5-8The lifting plate 8 has a movable groove 93 inside, and the movable groove 93 is connected to several through holes 91. A circular adjusting plate 94 is rotatably connected inside the movable groove 93. The top of the lifting plate 8 is provided with a rotating component for adjusting the rotation of the adjusting plate 94. Several auxiliary holes 95 are opened inside the adjusting plate 94, and several dispersing holes 96 are opened on one side of the several auxiliary holes 95.

[0057] The aperture of the auxiliary hole 95 is the same as that of the through hole 91, so that the beta radiation source 6 on the positioning seat 5 can be detected by the beta ray detector 92 through the overlapping auxiliary hole 95 and through hole 91.

[0058] The dispersion hole 96 is an irregularly shaped hole to facilitate the collection of beta rays from the irregular surface and different positions of the beta radiation source 6 by the beta ray detector 92, thereby improving the detection effect. The rotating part can drive the adjustment plate 94 to rotate and adjust, and can drive the auxiliary hole 95 and the irregular dispersion hole 96 to change positions, thus forming a switch between different detection methods.

[0059] The rotating component includes a rotating shaft 97 rotatably connected inside the movable slot 93. The outer surface of the rotating shaft 97 is fixedly connected to the inside of the adjusting plate 94. The top end of the rotating shaft 97 extends to the top of the lifting plate 8. The top of the lifting plate 8 is fixedly connected to a second motor 98 via a bracket. The output shaft of the second motor 98 is fixedly connected to the top end of the rotating shaft 97.

[0060] The second motor 98 is connected to an external power supply and control switch to drive the rotating shaft 97 to rotate. The rotation of the rotating shaft 97 drives the adjusting plate 94 to rotate. The rotation of the adjusting plate 94 not only drives several auxiliary holes 95 to revolve, but also drives several sets of dispersion holes 96 to revolve. This allows the β-ray detector 92 to collect β-rays from different β-radiation sources 6 through dispersion holes 96 at different positions, thus achieving uniform detection of the β-radiation source 6.

[0061] Example 3: The difference from Example 1 is that;

[0062] See attached document Figure 7 The adjustment assembly 10 includes a bidirectional lead screw 101 rotatably connected inside the housing 1. Both ends of the bidirectional lead screw 101 extend to the outside of the housing 1. Threaded blocks 102 are threadedly connected to the outer surfaces of both ends of the bidirectional lead screw 101. The tops of the two threaded blocks 102 are slidably connected to the top of the inner wall of the housing 1. Drive frames 103 are hinged to the bottoms of the two threaded blocks 102. The bottoms of the two drive frames 103 are hinged to the top of the lifting plate 8.

[0063] Both ends of the bidirectional lead screw 101 extend to the outside of the housing 1, so that the operator can control the rotation of the bidirectional lead screw 101 by hand. The rotation of the bidirectional lead screw 101 can drive the two threaded blocks 102 to drive relative to or away from each other, which in turn can drive the two drive frames 103 to move in a fan shape, which in turn can drive the lifting plate 8 to move up and down, so as to realize the height adjustment of the detection component 9, meet the detection work at different heights, and further improve the detection effect.

[0064] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A beta radioactive source activity detection instrument, comprising an L-shaped shell (1), an opening is formed in the top of the shell (1), and a U-shaped protective cover (2) is hingedly connected at the opening, a touchable display panel (3) for displaying activity information is fixedly installed on the top of the shell (1), characterized in that: The housing (1) is provided with two detection platforms (4) inside. The top of each of the two detection platforms (4) is fixedly connected with several positioning seats (5), and the two sets of positioning seats (5) are provided with β-radiation sources (6). The housing (1) is provided with a drive assembly (7) for reciprocating drive of the two detection platforms (4), and the two drive ends of the drive assembly (7) are respectively connected to the two detection platforms (4). The housing (1) is provided with a guide for position conversion of the two detection platforms (4). The housing (1) is slidably connected with a lifting plate (8), and the lifting plate (8) is located above the guide. The lifting plate (8) is provided with a detection assembly (9) for detecting the emissivity of the β-radiation source (6). The housing (1) is provided with an adjustment assembly (10) for adjusting the height of the lifting plate (8). The drive assembly (7) includes two sliding blocks (71) slidably connected to the bottom of the inner wall of the housing (1). The top of each of the two sliding blocks (71) is slidably connected to an L-shaped frame (72), and the top of each of the two L-shaped frames (72) is fixedly connected to a guide rod (73). The top of each of the two guide rods (73) is fixedly connected to the bottom of the two detection tables (4). The housing (1) is provided with a drive component for reciprocating drive of the two sliding blocks (71). The driving component includes two threaded rods (74) rotatably connected inside the housing (1), and the two threaded rods (74) are symmetrically arranged. The two threaded rods (74) are respectively connected to the internal threads of two sliding blocks (71). A pulley (75) is fixedly connected to the outer surface of one end of each of the two threaded rods (74). The two pulleys (75) are connected by belt drive. A first motor (76) is fixedly connected to the back of the housing (1). The output shaft of the first motor (76) is fixedly connected to one end of one of the threaded rods (74). The guide includes a guide plate (11) fixed inside the housing (1), and a guide groove (12) is provided inside the guide plate (11). A circular plate (13) is fixedly connected to the bottom of the inner wall of the housing (1) by a bracket, and the circular plate (13) is located inside the guide groove (12). Both guide rods (73) are slidably connected inside the guide groove (12).

2. The β-radiation source emissivity detection instrument according to claim 1, characterized in that: The detection component (9) includes several through holes (91) opened inside the lifting plate (8) and several beta-ray detectors (92) fixed to the top of the lifting plate (8) by brackets. The receiving surfaces of the beta-ray detectors (92) face downward and are concentric with the corresponding through holes (91).

3. The β-radiation source emissivity detection instrument according to claim 2, characterized in that: The lifting plate (8) has an internal movable groove (93), and the movable groove (93) is connected to several through holes (91). A circular adjusting plate (94) is rotatably connected inside the movable groove (93). The top of the lifting plate (8) is provided with a rotating component for adjusting the rotation of the adjusting plate (94). The adjusting plate (94) has several auxiliary holes (95) inside, and several dispersing holes (96) are provided on one side of the several auxiliary holes (95).

4. The β-radiation source emissivity detection instrument according to claim 3, characterized in that: The rotating component includes a rotating shaft (97) rotatably connected inside the movable groove (93). The outer surface of the rotating shaft (97) is fixedly connected to the inside of the adjusting plate (94). The top end of the rotating shaft (97) extends to the top of the lifting plate (8). The top of the lifting plate (8) is fixedly connected to a second motor (98) via a bracket. The output shaft of the second motor (98) is fixedly connected to the top end of the rotating shaft (97).

5. The β-radioactive source emissivity detection instrument according to claim 1, characterized in that: The adjustment assembly (10) includes a bidirectional lead screw (101) rotatably connected inside the housing (1). Both ends of the bidirectional lead screw (101) extend to the outside of the housing (1). The outer surfaces of both ends of the bidirectional lead screw (101) are threaded with threaded blocks (102). The tops of the two threaded blocks (102) are slidably connected to the top of the inner wall of the housing (1). The bottoms of the two threaded blocks (102) are hinged with drive frames (103). The bottoms of the two drive frames (103) are hinged to the top of the lifting plate (8).

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