A multi-parameter rapid detection device for gemstone radioactivity

Abstract

This invention belongs to the field of jewelry testing technology and provides a rapid multi-parameter radioactivity detection device for jewelry and jade, including a housing, a multi-functional detection area, a tray, and a sample loading container. The multi-functional detection area is fixedly installed on the top of the housing and is used to detect radioactivity. The tray is placed inside the housing, and the sample loading container is placed on the tray to hold the sample to be tested. This invention establishes a closed and stable detection environment, adopts a sealed structure, and is set in an independent space with minimal external interference. This design can effectively isolate natural radioactive interference such as radon gas in the environment, while significantly reducing the influence of external gamma-ray background on the measurement results, providing a basic guarantee for accurate measurement, and realizing rapid and non-destructive measurement of gamma radiation dose rate and α / β surface contamination level on the surface of jewelry and jade.

Description

Technical Field

[0001] This invention belongs to the field of jewelry testing technology, specifically relating to a rapid multi-parameter detection device for radioactivity in jewelry and jade. Background Technology

[0002] The radioactivity of gemstones mainly comes from two sources: naturally occurring radioactive substances within the gemstones themselves, and artificial irradiation treatments used to alter their color. Currently, the radioactivity of gemstones is primarily measured using a gamma radiation dose rate meter for initial screening. If the reading exceeds a set threshold, further radionuclide analysis is conducted. This method has significant limitations, leading to unreliable results, mainly in four aspects: first, the measurement results are easily affected by environmental radioactivity (especially radon and its decay products); second, the measurement process relies on manual operation, making it difficult to standardize the distance between the probe and the sample; third, there is a lack of standards for measurement time and frequency, and data processing is not standardized; and fourth, α / β surface contamination is not detected.

[0003] To address the aforementioned issues, this invention presents a rapid multi-parameter detection device for radioactivity in jewelry and jade. This device enables rapid, non-destructive measurement of the gamma radiation dose rate and α / β surface contamination levels on the surface of jewelry and jade. The preliminary screening results have clear diagnostic value, effectively indicating to testing personnel whether further radionuclide content analysis is necessary, thereby significantly reducing unnecessary subsequent testing procedures and improving overall work efficiency. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a rapid multi-parameter detection device for radioactivity in jewelry and jade, thereby resolving the issues in the prior art. The technical solution adopted by this invention is as follows:

[0005] A rapid multi-parameter radioactivity detection device for jewelry and jade includes a housing, a multi-functional detection area, a tray, and a sample loading container;

[0006] The multi-functional detection area is fixedly installed at the top of the box, and the multi-functional detection area is used to detect radioactivity.

[0007] The tray is installed inside the box, and the tray is used to place the sample to be tested.

[0008] Furthermore, the multifunctional detection area is equipped with: α, β, and γ detectors and matching photomultiplier tubes for synchronously capturing various radiation signals; and a temperature and humidity sensor for detecting the temperature and humidity inside the chamber.

[0009] Furthermore, the enclosure is equipped with a switch door, which has lead glass and a handle; the top of the enclosure is equipped with an operation panel.

[0010] Furthermore, a lifting device is fixedly connected to the bottom of the tray, a moving block is fixedly connected to the bottom of the lifting device, the moving block is connected to a lead screw, and a motor is fixedly connected to the end of the lead screw.

[0011] Furthermore, the wall of the enclosure comprises a three-layer structure, consisting of a stainless steel layer, a lead plate layer, and a copper plate layer from the outside to the inside.

[0012] Furthermore, the side of the enclosure is provided with an air inlet and an air outlet.

[0013] Furthermore, the exhaust vent is connected to an exhaust pipe.

[0014] Furthermore, the air inlet is connected to an air intake pipe, and the air intake pipe is connected to a purification mechanism that contains activated carbon.

[0015] Furthermore, the purification mechanism includes an outer cylinder, an inner cylinder, a cover plate, a first grid, and a second grid;

[0016] The outer cylinder is fixedly installed on the box body, and the inner cylinder is rotatably arranged inside the outer cylinder. The inner cylinder has multiple independent chambers, and each independent chamber is filled with activated carbon. A connecting shaft is fixedly connected inside the inner cylinder, and the multiple independent chambers are distributed around the connecting shaft. A gas source inlet pipe is fixedly connected to the outer side of the outer cylinder.

[0017] Each of the independent chambers is provided with the first grid mesh at its inner end, and each of the independent chambers is provided with the second grid mesh on its side. One end of the outer cylinder is fixedly connected to the air inlet pipe. The air inlet pipe connects to one of the independent chambers, and the independent chamber is connected to the air source inlet pipe. The air input by the air source inlet pipe passes through the second grid mesh, the activated carbon in the independent chamber, and the first grid mesh before entering the air inlet pipe.

[0018] The end of the inner cylinder away from the air inlet pipe is detachably connected to the cover plate, and the cover plate is rotatably connected to the outer cylinder. By rotating the cover plate, air can pass through the activated carbon in different independent chambers.

[0019] This invention offers the following advantages: It establishes a closed and stable detection environment, employing a sealed structure and situated within an independent space with minimal external interference. This design effectively isolates natural radioactive interference such as radon gas from the environment, while significantly reducing the impact of external gamma-ray background on measurement results. This provides a fundamental guarantee for accurate measurement, enabling rapid and non-destructive measurement of gamma radiation dose rate and α / β surface contamination levels on the surface of jewelry and jade. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram;

[0021] Figure 2 This is a schematic diagram of a three-layer structure;

[0022] Figure 3 Schematic diagram of a scintillator detector;

[0023] Figure 4 This is a cross-sectional schematic diagram;

[0024] Figure 5 This is a schematic diagram of a purification system;

[0025] Figure 6 This is a schematic diagram of each independent chamber. Detailed Implementation

[0026] The following will be based on embodiments of the present invention. Figures 1-6 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0027] like Figure 1 , Figure 4 A rapid multi-parameter radioactive detection device for jewelry and jade includes a housing 1, a multi-functional detection area 2, a tray 3, and a sample loading container;

[0028] The multi-functional detection area 2 is fixedly installed at the top of the box 1, and the multi-functional detection area 2 is used to detect radioactivity.

[0029] The tray 3 is installed inside the box 1, and the tray 3 is used to place the sample to be tested.

[0030] Before testing, place the jewelry and jade sample to be tested on tray 3; after closing the door of the box 1, start the testing system, and the multi-functional detection area 2 will start to conduct radioactivity testing on the sample. After the test is completed, the sample can be taken out directly, realizing a rapid testing operation.

[0031] The enclosure 1 provides a closed space for testing, preventing external environmental interference with the test results; the multi-functional detection area 2, as the core detection component, captures radioactive rays that may be released by the jewelry and jade samples through built-in detection elements; the tray 3 provides stable support for the sample, ensuring that the sample is within the effective detection range of the detection area.

[0032] This invention solves the problems of complex setup and cumbersome sample placement required for radioactivity detection of jewelry and jade in the prior art. The overall structure is simple, the operation steps are few, and the convenience of detection is greatly improved.

[0033] This invention establishes a closed and stable detection environment, employing a sealed structure and located in an independent space with minimal external interference. This design effectively isolates natural radioactive interference such as radon gas from the environment, while significantly reducing the impact of external gamma-ray background on the measurement results, providing a fundamental guarantee for accurate measurements.

[0034] Furthermore, the multifunctional detection zone 2 is equipped with α, β, and γ detectors and corresponding photomultiplier tubes for synchronously capturing various radiation signals.

[0035] like Figure 1 A photomultiplier tube is installed in the photomultiplier region 17, which is located between the α / β detector 12 and the γ detector 13.

[0036] In its specific implementation, this invention first uses a rapid and non-destructive preliminary screening to identify suspicious samples, and then performs targeted and precise analysis on the screened samples. In actual measurements, a portable design integrating a scintillator detector is employed, the structure of which is as follows: Figure 3 The principle is:

[0037] 1. Interaction between radiation and scintillator:

[0038] When a photon enters the scintillator, it interacts with crystal atoms through the photoelectric effect, Compton effect, or electron-pair effect (ionization and excitation), generating secondary electrons. These secondary electrons carry part of the energy of the gamma photon and move within the scintillator.

[0039] When beta particles (high-speed electron streams) enter the scintillator, they transfer energy to the atoms or molecules in the scintillator through ionization and excitation.

[0040] When high-energy alpha particles collide with a scintillator (such as zinc sulfide ZnS(Ag)), due to their large mass and high charge, they undergo strong ionization and excitation interactions with the atoms in the scintillator material, depositing most of their energy into the scintillator over a very short distance. This energy causes electrons in the scintillator to transition from the ground state to an excited state.

[0041] 2. Scintillator luminescence: Secondary electrons transfer energy to atoms or molecules in the scintillator through ionization and excitation. When excited atoms de-excite, they emit fluorescent photons with wavelengths in the visible or near-visible light range.

[0042] 3. Photon Collection and Transmission: Fluorescent photons are transmitted to the photocathode of the photomultiplier tube in the scintillator via reflection, refraction, or optical guides (such as optical fibers or silicone oil coupling layers). The design of the optical guide can optimize photon collection efficiency and reduce transmission losses.

[0043] 4. Photoelectric Conversion and Multiplication: When photons strike the photocathode, photoelectrons are generated through the photoelectric effect. The number of photoelectrons is directly proportional to the number of incident photons. Within the photomultiplier tube, the photoelectrons are accelerated by an electric field, striking the first dinter electrode and generating multiple secondary electrons. This process repeats sequentially between multiple dinter electrodes, resulting in an exponential increase in the number of electrons.

[0044] 5. Anode output: The multiplied electron flow is collected by the anode, forming a negative voltage pulse that is proportional to the energy of the incident γ photon.

[0045] 6. Signal Processing and Analysis: The weak pulses output from the anode are processed by a preamplifier and a main amplifier (with optimized pulse shape), and the pulse amplitude distribution is recorded by a multichannel pulse amplitude analyzer (MCA). By analyzing the energy spectrum, the energy and intensity information of the gamma rays can be determined.

[0046] Furthermore, the housing 1 is provided with a switch door, which is equipped with lead glass 16 and a handle 14; the top of the housing 1 is provided with an operation panel 15.

[0047] Furthermore, a lifting device 10 is fixedly connected to the bottom of the tray 3, a moving block 9 is fixedly connected to the bottom of the lifting device 10, the moving block 9 is connected to a lead screw 8, and a motor 7 is fixedly connected to the end of the lead screw 8.

[0048] This invention employs a transmission structure consisting of a motor 7, a lead screw 8, and a moving block 9. The rotational motion of the motor 7 is converted into linear motion of the moving block 9, which is then transmitted to the tray 3 via a lifting device 10. The high precision of the lead screw transmission ensures smooth and accurate movement of the tray 3. The forward and reverse rotation of the motor 7 allows for forward / backward and left / right movement of the tray 3, meeting the requirements of different detection positions. The bottom of the moving block 9 is limited by a slide rail to prevent rotation. The lifting device 10 serves to adjust the height and can be a motor, a hydraulic lifting column, or an electric push rod, among other structures.

[0049] like Figure 2 The wall of the box 1 has a three-layer structure, consisting of a stainless steel layer, a lead plate layer, and a copper plate layer from the outside to the inside.

[0050] Furthermore, the side of the housing 1 is provided with an air inlet 4 and an air outlet 5.

[0051] Furthermore, the exhaust vent 5 is connected to a waste gas emission pipe 19. The waste gas emission pipe 19 can be connected to corresponding waste gas treatment equipment.

[0052] Furthermore, the air inlet 4 is connected to an air intake pipe 18, and the air intake pipe 18 is connected to a purification mechanism that contains activated carbon 28.

[0053] Furthermore, the purification mechanism includes an outer cylinder 23, an inner cylinder 22, a cover plate 26, a first grid 21, and a second grid 20;

[0054] The outer cylinder 23 is fixedly installed on the housing 1. The inner cylinder 22 is rotatably arranged inside the outer cylinder 23. The inner cylinder 22 has multiple independent chambers, and each independent chamber is provided with activated carbon 28. A connecting shaft 24 is fixedly connected inside the inner cylinder 22, and the multiple independent chambers are distributed around the connecting shaft 24. A gas source inlet pipe 27 is fixedly connected to the outer side of the outer cylinder 23.

[0055] Each of the independent chambers is provided with a first grid mesh 21 at its inner end, and a second grid mesh 20 is provided on the side of each of the independent chambers. One end of the outer cylinder 23 is fixedly connected to the air inlet pipe 18, which connects to one of the independent chambers. This independent chamber is connected to the air source inlet pipe 27. The air input through the air source inlet pipe 27 passes through the second grid mesh 20, the activated carbon 28 in the independent chamber, and the first grid mesh 21 before entering the air inlet pipe 18. The air source inlet pipe 27 can be connected to a blower, which can be installed on the back of the housing 1.

[0056] The inner cylinder 22 is detachably connected to the cover plate 26 at the end away from the air inlet pipe 18. The cover plate 26 is rotatably connected to the outer cylinder 23. By rotating the cover plate 26, air can pass through the activated carbon 28 in different independent chambers.

[0057] During testing, external air enters the currently connected independent chamber through the air source inlet pipe 27, passes sequentially through the second grid mesh 20, activated carbon 28, and the first grid mesh 21, and enters the housing 1 through the air inlet pipe 18 and the air inlet 4. When the activated carbon 28 in the current independent chamber is saturated, the cover plate 26 is rotated, causing the inner cylinder 22 to rotate within the outer cylinder 23, connecting another independent chamber containing new activated carbon 28 to the air source inlet pipe 27 and the air inlet pipe 18, thus continuing air purification. When it is necessary to replace the activated carbon 28, the cover plate 26 is removed, and the saturated activated carbon 28 is replaced.

[0058] The outer cylinder 23 provides an enclosure for the inner cylinder 22, which serves as both a mounting and protective shell. Multiple independent chambers within the inner cylinder 22 can be individually filled with activated carbon 28, enabling the standby and rotation of activated carbon. The first grid 21 and the second grid 20 support the activated carbon 28, preventing activated carbon particles from entering the chamber 1 with the airflow, while not obstructing airflow. The cover 26 not only seals the inner cylinder 22 but also allows for rapid switching of the activated carbon 28 by rotating the inner cylinder 22 to switch between independent chambers. This solves the problem of existing purification mechanisms requiring shutdown and cumbersome operation for activated carbon replacement. Through the multi-chamber design and the rotating switch of the cover 26, the rotation of activated carbon 28 can be achieved without interrupting detection.

[0059] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, substitutions, or variations made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for rapid multi-parameter detection of radioactive gemstones, characterized in that, It includes a housing (1), a multi-functional detection area (2), a tray (3), and a sample loading container; The multifunctional detection area (2) is fixedly installed at the top of the box (1), and the multifunctional detection area (2) is used to detect radioactivity; The tray (3) is installed inside the box (1), and the sample to be tested is placed on the tray (3); The side of the box (1) is provided with an air inlet (4) and an air outlet (5); The air inlet (4) is connected to an air inlet pipe (18), and the air inlet pipe (18) is connected to a purification mechanism that contains activated carbon (28). The purification mechanism includes an outer cylinder (23), an inner cylinder (22), a cover plate (26), a first grid (21), and a second grid (20). The outer cylinder (23) is fixedly installed on the box (1). The inner cylinder (22) is rotatably arranged inside the outer cylinder (23). The inner cylinder (22) has multiple independent chambers, and each independent chamber is provided with activated carbon (28). A connecting shaft (24) is fixedly connected inside the inner cylinder (22), and the multiple independent chambers are distributed around the connecting shaft (24). A gas source inlet pipe (27) is fixedly connected to the outer side of the outer cylinder (23). Each of the independent chambers is provided with the first grid mesh (21) at its inner end and with the second grid mesh (20) on its side. One end of the outer cylinder (23) is fixedly connected to the air inlet pipe (18). The air inlet pipe (18) connects to one of the independent chambers, which is connected to the air source inlet pipe (27). The air input from the air source inlet pipe (27) passes through the second grid mesh (20), the activated carbon (28) in the independent chamber, and the first grid mesh (21) before entering the air inlet pipe (18). The inner cylinder (22) is detachably connected to the cover plate (26) at the end away from the air inlet pipe (18). The cover plate (26) is rotatably connected to the outer cylinder (23). By rotating the cover plate (26), air can pass through the activated carbon (28) in different independent chambers.

2. The device for rapid detection of radioactive multi-parameters of gemstones according to claim 1, characterized in that, The multifunctional detection area (2) is equipped with: α, β, γ detectors and matching photomultiplier tubes (17) for synchronously capturing various radiation signals; and a temperature and humidity sensor (11) for detecting the temperature and humidity inside the box (1).

3. The device for rapid multi-parameter detection of radioactivity of a gemstone according to claim 1, characterized in that, The box (1) is equipped with a switch door, which is fitted with lead glass (16) and a handle (14); the top of the box (1) is equipped with an operation panel (15).

4. The device for rapid multi-parameter detection of radioactivity of a gemstone according to claim 1, characterized in that, The bottom of the tray (3) is fixedly connected to a lifting device (10), the bottom of the lifting device (10) is fixedly connected to a moving block (9), the moving block (9) is connected to a lead screw (8), and the end of the lead screw (8) is fixedly connected to a motor (7).

5. The device for rapid detection of radioactive multi-parameters of gemstones according to claim 1, characterized in that, The wall of the box (1) includes a three-layer structure, which consists of a stainless steel layer, a lead plate layer, and a copper plate layer from the outside to the inside.

6. The device for rapid multi-parameter detection of radioactivity of a gemstone according to claim 1, characterized in that, The exhaust port (5) is connected to the exhaust pipe (19).

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