A fully automatic low-background gamma spectrometer for building materials

Abstract

The invention discloses a full-automatic low-background gamma spectrometer for building materials, which belongs to the technical field of spectrometers and comprises: a working frame and a spectrometer, a closed door assembly is arranged on the top of the spectrometer, a driving assembly is arranged inside the closed door assembly, a moving assembly 2 is installed on the top of a storage plate, a moving assembly 3 is arranged on the top of the moving assembly 2, and a moving assembly 1 is arranged on the outer end of the moving assembly 3, when the gear drives the rack to drive the movable frame to move, the movable door will move along the fixed frame, when it moves to just below the sealing ring, the pulley 2 will slide to the corner of the slide groove, and then the pulley 2 will slide upward to drive the movable door to close with the sealing ring, when the movable frame moves in the opposite direction, the movable door can be opened, and the cooperation of the closed door assembly and the driving assembly can distinguish it from the fixed door of the traditional spectrometer, and it does not need to be opened and closed manually, thereby improving the convenience of use.

Description

Technical Field

[0001] The invention relates to the technical field of energy spectrometers, and more particularly to a full-automatic low-background gamma energy spectrometer for building materials. Background Art

[0002] Low-background gamma spectrometer is a precision instrument used to measure the energy and intensity of gamma rays emitted by radionuclides. It measures the radioactivity of samples through a low-background lead chamber and a low-potassium NaI (Tl) probe. It has high stability and accuracy and is widely used in gamma spectrum measurement and analysis of building materials, soil, biological, geological samples, etc. to improve the identification of radionuclides in samples. In the field of radioactivity measurement, low background usually refers to the low background radiation level generated by the measuring instrument or equipment itself, without interference radiation from external radioactive sources, ensuring that the measured radiation signal comes from the radioactive sample or source of concern, which can improve the accuracy and sensitivity of the measurement.

[0003] The Chinese patent announcement number CN213658984U discloses a fully automatic low-background multi-channel gamma spectrometer. The setting of the limit assembly can limit the opening angle of the first top cover or the second top cover, which is beneficial to prevent the first top cover or the second top cover from opening at an angle greater than 40 degrees, thereby helping to protect the gamma spectrometer. The coordinated setting of the sealing layer and the sealing groove can improve the sealing of the first top cover and the second top cover, thereby helping to reduce the impact of the humid environment on the inside of the shielding barrel.

[0004] In order to reduce the interference from the external environment, the inner wall of the tank of the low-background spectrometer is filled with thicker lead, so it is heavy. It is difficult to open and close the spectrometer door every time. At the same time, when multiple samples need to be tested one by one, they need to be taken out manually after each test. Manually placing samples one by one consumes a lot of time and human resources, reducing the detection efficiency, especially when a large number of samples need to be processed, which is not conducive to improving the detection efficiency.

[0005] Therefore, it is necessary to provide a fully automatic low-background gamma spectrometer for building materials to solve the above problems. Summary of the invention

[0006] The present invention provides a fully automatic low-background gamma spectrometer for building materials, which can improve the problem in the related art that samples need to be placed manually one by one, which consumes a lot of time and human resources and reduces the detection efficiency, especially when a large number of samples need to be processed, which is not conducive to improving the detection efficiency.

[0007] The embodiment of the present application provides a fully automatic low-background gamma spectrometer for building materials, including: a working frame and a spectrometer, the working frame includes an upper group frame and a lower group frame, the upper group frame and the lower group frame are connected by a storage plate, a closed door component is arranged at the top of the spectrometer, a driving component is arranged inside the closed door component, a moving component 2 is installed at the top of the storage plate, a moving component 3 is arranged at the top of the moving component 2, a moving component 1 is arranged at the outer end of the moving component 3, the closed door component includes a shell, a movable frame, a sealing ring and a movable door, and the inner side wall of the shell is fixedly mounted Two symmetrically distributed fixed frames are equipped, and two connecting plates are fixedly installed at the bottom end of the movable door. The outer sides of the two connecting plates are rotatably connected with pulley 2, and the connecting plate is rotatably connected with a connecting rod on the side away from pulley 2. One end of the connecting rod is rotatably connected to the outer end of the movable frame, and a slide groove is provided at the outer end of the fixed frame. The pulley 2 is slidably connected to the slide groove. The slide groove path is L-shaped. After the movable frame is driven by the driving component, it drives the movable door to move. When the pulley 2 slides to the end along the slide groove path, the movable door is pushed upward by the connecting rod to match the sealing ring to form a seal.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] (1) When the gear drives the rack to drive the movable frame to move, the movable door will move along the fixed frame. When it moves to the bottom of the sealing ring, pulley 2 will slide to the corner of the slide groove, and then pulley 2 will slide upward, driving the movable door and the sealing ring to close. When the movable frame moves in the opposite direction, the movable door can be opened. The cooperation of the closed door assembly and the drive assembly can make it different from the fixed door of the traditional energy spectrometer. It does not need to be opened and closed manually, which improves the convenience of use.

[0010] (2) A moving component 2 is arranged on the top of the storage plate, a moving component 3 is arranged on the top of the moving component 2, and a moving component 1 is arranged on the outer end of the moving component 3. The moving component 2 is mainly used for movement in the Y-axis direction, the moving component 3 is used for movement in the X-axis direction, and the moving component 1 can be used for movement in the Z-axis direction. Through their coordination, the vacuum suction cup can suck up the sample box on the storage rack, and the closed door component can automatically open and close the door, so that the sample box can be automatically placed in the spectrometer for inspection. Automatic placement of samples can improve detection efficiency. There is no need to manually place samples one by one, which can save a lot of time and reduce labor costs.

[0011] (3) Multiple layers of wound lead layers are arranged inside the outer protective layer to enhance its ability to protect against external radiation. At the same time, a coating is applied between each layer of lead layer. The coating has high density and chemical stability, which can effectively block the penetration of radiation. It can cooperate with the lead layer to further enhance the resistance to interference from external environmental radiation, thereby improving the accuracy of detection.

[0012] In some embodiments, a glass window is provided on the outer periphery of the upper group frame, a plurality of universal wheels are installed on the bottom end of the lower group frame, a storage rack is fixedly installed on the top end of the storage board, a plurality of sample boxes are arranged on the top end of the storage rack, two side baffles are fixedly installed on the top end of the storage board, and a notch adapted to the shell is arranged on the outer end of the storage board.

[0013] In some embodiments, the sealing ring is fixedly installed on the top of the shell, and two symmetrically distributed fixing frames are fixedly installed on the inner wall of the shell. Through holes are opened at the top and bottom of the shell, and the shell is fixedly installed on the top of the spectrometer through the bottom through hole. The movable door is adapted to the top through hole, and pulley 1 is rotatably connected on both sides of the movable frame. The pulley 1 is slidably connected to the slide groove to improve the stability of the movable frame when moving. Limiting inclined surfaces are arranged on both sides of the edge of the slide groove, and a limiting groove adapted to the limiting inclined surface is arranged near the middle of the outer end of the pulley 2, and the pulley 2 is clamped on the inner side of the slide groove through the limiting groove.

[0014] In some embodiments, the driving assembly includes servo motor 2, a rotating shaft and a fixed plate 1, wherein the servo motor 2 and the fixed plate 1 are fixedly mounted at the bottom end of the shell, the rotating shaft passes through the fixed plate 1, and both ends of the rotating shaft are rotatably connected to the inner side walls of the shell, the output end of the servo motor 2 passes through the fixed plate 1, and the output end of the servo motor 2 is key-connected to the driving pulley 2, the outer end of the rotating shaft is fixedly connected to the passive pulley 2, and the driving pulley 2 and the passive pulley 2 are connected through a belt transmission.

[0015] In some embodiments, the driving assembly also includes a second fixed plate and a rack, a gear is fixedly installed on the outer end of the rotating shaft, the rack is meshed with the gear, and the rack is fixedly installed on the bottom end of the movable frame, the second fixed plate is fixedly installed on the bottom end of the shell, the outer end of the second fixed plate is fixedly connected to a clamping frame, and two limit blocks are fixedly installed on the bottom end of the clamping frame, and movable grooves matching the limit blocks are opened on both sides of the rack, the movable grooves are slidably connected to the limit blocks, and the rotating shaft passes through the second fixed plate.

[0016] In some embodiments, the movable component 2 includes a mounting plate 2, which is fixedly mounted on the outer end of one of the side baffles by bolts, a cylinder 2 is fixedly mounted on the bottom end of the mounting plate 2, a piston rod 2 is mounted inside the cylinder 2, a reverse thrust plate is fixedly mounted on the output end of the piston rod 2, and a drive plate is fixedly mounted on the outer end of the reverse thrust plate.

[0017] In some embodiments, the moving component three includes a servo motor 1, a passive pulley 1, a movable plate and a mounting plate 1, the servo motor 1 is fixedly mounted on the top of the movable plate, the output end of the servo motor 1 is keyed to a driving pulley 1, the passive pulley 1 is rotatably mounted on the top of the movable plate, the driving pulley 1 and the passive pulley 1 are connected by a belt transmission, a splint is fixedly mounted on the outer end of the belt 1, the splint is fixedly connected to the mounting plate 1, the mounting plate 1 and the moving path of the movable plate are vertically arranged, the driving plate is connected to the movable plate by bolts, and the movable plate is moved by pushing the driving plate by a piston rod 2.

[0018] In some embodiments, the moving component three also includes a slide rail two and a slide rail one, and the bottom end of the movable plate is fixedly installed with a slider two and a slider one respectively, the slide rail two is fixedly installed on the top of the mounting plate two, and the slide rail one is fixedly installed on the top of the storage plate, the slider two is slidably connected to the slide rail two, and the slider one is slidably connected to the slide rail one, the top of the movable plate is fixedly installed with a slide rail three, the bottom end of the mounting plate one is fixedly installed with a slide rail three, and the slide rail three is slidably connected to the slide rail three, and the moving component one includes a cylinder one, the cylinder one is fixedly installed on the outer end of the mounting plate one, a piston rod one is installed inside the cylinder one, and a vacuum suction cup is fixedly installed on the output end of the piston rod one, and the vacuum suction cup sucks up the sample box and moves it through an external cylinder device.

[0019] In some embodiments, the spectrometer includes a support frame, an inner sleeve is fixedly mounted on the top of the support frame, a plurality of lead chambers are arranged outside the inner sleeve, a detector is mounted on the bottom of the support frame, and the detector probe extends into the inner sleeve.

[0020] In some embodiments, the lead chamber includes an outer protective layer), the outer protective layer is made of stainless steel, the interior of the outer protective layer is annular and hollow, multiple lead layers are installed inside the outer protective layer, and coatings are arranged between the multiple lead layers. The coatings are made of barium sulfate. Multiple slots are opened at the outer end of the outer protective layer, and rods are detachably installed inside the slots. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A first overall structural diagram provided for an embodiment of the present application;

[0023] Figure 2 A second overall structural diagram provided for an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the working frame structure provided for an embodiment of the present application;

[0025] Figure 4 A schematic diagram of a first partial enlarged structure provided in an embodiment of the present application;

[0026] Figure 5 A second partial enlarged structural schematic diagram provided in an embodiment of the present application;

[0027] Figure 6 A schematic diagram of the structure of a second mobile component provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of the structure of a mobile component provided in an embodiment of the present application;

[0029] Figure 8 A schematic cross-sectional view of a closed door assembly provided in an embodiment of the present application;

[0030] Fig. 9 A schematic diagram of the structure of a closed door assembly provided in an embodiment of the present application;

[0031] Fig.10 A schematic diagram of a partial structure of a closed door assembly provided in an embodiment of the present application;

[0032] Fig.11 A schematic diagram of the structure of the pulley 2 provided in the embodiment of the present application;

[0033] Fig.12 A schematic diagram of a rack structure provided in an embodiment of the present application;

[0034] Fig.13 A schematic diagram of the structure of a drive assembly provided in an embodiment of the present application;

[0035] Fig.14 A schematic diagram of the structure of an energy spectrometer provided in an embodiment of the present application;

[0036] Fig.15 A schematic diagram of the lead chamber structure provided in an embodiment of the present application.

[0037] Description of the numbers in the figure:

[0038] 1. Working frame; 11. Upper assembly frame; 12. Side baffle; 13. Lower assembly frame; 14. Storage board; 15. Universal wheel;

[0039] 2. Energy spectrometer; 21. Lifting frame; 22. Detector; 23. Lead chamber; 24. Inner sleeve; 231. Outer protective layer; 232. Lead layer; 233. Coating; 234. Slot; 235. Insertion rod;

[0040] 3. Moving assembly three; 31. Servo motor one; 32. Belt one; 33. Driving pulley one; 34. Passive pulley one; 35. Movable plate; 36. Slider one; 37. Slide rail one; 38. Slider two; 39. Slide rail two; 310. Clamp; 311. Mounting plate one; 312. Slide rail three; 313. Slider three;

[0041] 4. Object moving component 1; 41. Cylinder 1; 42. Piston rod 1; 43. Vacuum suction cup;

[0042] 5. Sample box;

[0043] 6. Closed door assembly; 61. Shell; 62. Movable door; 63. Sealing ring; 64. Fixed frame; 65. Movable frame; 66. Pulley 1; 67. Pulley 2; 68. Connecting rod; 69. Connecting plate; 610. Slide; 611. Limiting inclined plane; 612. Limiting groove;

[0044] 7. Storage rack;

[0045] 8. Moving assembly 2; 81. Mounting plate 2; 82. Driving plate; 83. Reverse thrust plate; 84. Cylinder 2; 85. Piston rod 2;

[0046] 9. Driving assembly; 91. Servo motor 2; 92. Rotating shaft; 93. Fixed plate 1; 94. Gear; 95. Rack; 96. Fixed plate 2; 97. Clamping frame; 98. Limit block; 99. Movable slot; 910. Active pulley 2; 911. Belt 2; 912. Passive pulley 2. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] Based on this, the problem in the related technology that samples need to be placed manually one by one consumes a lot of time and human resources, reduces detection efficiency, and is not conducive to improving detection efficiency, especially when a large number of samples need to be processed.

[0049] See also Figure 1-Figure 15A fully automatic low-background gamma spectrometer for building materials, comprising: a working frame 1 and a spectrometer 2, the working frame 1 comprising an upper group frame 11 and a lower group frame 13, the upper group frame 11 and the lower group frame 13 are connected by a storage plate 14, a closed door assembly 6 is arranged at the top of the spectrometer 2, a driving assembly 9 is arranged inside the closed door assembly 6, a moving assembly 2 8 is installed at the top of the storage plate 14, a moving assembly 3 3 is arranged at the top of the moving assembly 2 8, a moving assembly 1 4 is arranged at the outer end of the moving assembly 3 3, the closed door assembly 6 comprises a shell 61, a movable frame 65, a sealing ring 63 and a movable door 62, two symmetrically distributed The fixed frame 64 and the bottom end of the movable door 62 are fixedly installed with two connecting plates 69, and the outer sides of the two connecting plates 69 are rotatably connected to the second pulley 67. The connecting plate 69 is rotatably connected to the side of the second pulley 67, and the connecting rod 68 is rotatably connected. One end of the connecting rod 68 is rotatably connected to the outer end of the movable frame 65. A slide groove 610 is provided at the outer end of the fixed frame 64, and the second pulley 67 is slidably connected to the slide groove 610. The path of the slide groove 610 is L-shaped. After the movable frame 65 is driven by the driving component 9, it drives the movable door 62 to move. When the second pulley 67 slides to the end along the path of the slide groove 610, the movable door 62 is pushed upward by the connecting rod 68 to match the sealing ring 63 to form a seal.

[0050] The device in this scheme is mainly an instrument used to measure the energy and intensity of gamma rays emitted by radionuclides in building materials. The main purpose of detecting gamma rays in building materials is to evaluate their radioactivity level and ensure that their impact on human health is within a safe range, such as stone, tile or cement.

[0051] A moving component 2 8 is arranged near the upper part of the working frame 1, a moving component 3 3 is arranged on the moving component 2 8, and a moving component 1 4 is arranged at the outer end of the moving component 3 3, wherein the moving component 2 8 is mainly used to carry the moving component 3 3 and the moving component 1 4 for movement, and the moving component 3 3 is mainly used to drag the moving component 1 4 for movement, and the moving directions of the moving components 3 3 and the moving components 2 8 are arranged vertically, so that the moving component 1 4 can be moved on a plane, and the moving component 1 4 itself can move the vacuum suction cup 43 up and down, and a spectrometer 2 is arranged at the lower part of the working frame 1, and the spectrometer 2 is mainly used to inspect building material samples, and the closed door component 6 arranged on the top of the spectrometer 2 is driven by the internal driving component 9 to automatically open and close the movable door 62.

[0052] When the gear 94 drives the rack 95 to drive the movable frame 65 to move, the movable door 62 will move along the fixed frame 64. When it moves to the bottom of the sealing ring 63, the pulley 67 will slide to the corner of the slide groove 610, and then the pulley 67 will slide upward, driving the movable door 62 and the sealing ring 63 to close. When the movable frame 65 moves in the opposite direction, the movable door 62 can be opened. The cooperation of the closed door assembly 6 and the driving assembly 9 can distinguish it from the fixed door of the traditional energy spectrometer, and it does not need to be opened and closed manually, thereby improving the convenience of use.

[0053] Optionally, in some embodiments, see Figure 1-Figure 3 The upper assembly frame 11 is surrounded by a glass window, a plurality of universal wheels 15 are installed at the bottom of the lower assembly frame 13, a storage rack 7 is fixedly installed on the top of the storage plate 14, a plurality of sample boxes 5 are arranged on the top of the storage rack 7, two side baffles 12 are fixedly installed on the top of the storage plate 14, and a notch adapted to the shell 61 is arranged at the outer end of the storage plate 14.

[0054] The working frame 1 in the present scheme is mainly composed of an upper group frame 11 and a lower group frame 13. The upper group frame 11 is located above the lower group frame 13. A storage plate 14 is fixed between the upper group frame 11 and the lower group frame 13. In addition to being used to connect the upper group frame 11 and the lower group frame 13, the storage plate 14 is mainly used to place a storage rack 7. A plurality of sample boxes 5 are placed on the storage rack 7, wherein the sample box 5 is mainly used to place samples. When testing building materials, the building materials need to be ground into powder. At this time, they need to be placed in the sample box 5 and then put into the spectrometer 2 for testing to prevent the sample from dirtying the inside of the spectrometer 2. It is worth mentioning that a camera needs to be set above the storage rack 7, and then cooperated with the machine vision system so that the object moving component 4 can accurately suck up the sample box 5.

[0055] A transparent glass window is arranged on the outside of the upper group frame 11 to facilitate users to observe the internal working conditions. A baffle is arranged on the outside of the lower group frame 13, which is mainly used to protect the spectrometer 2. A plurality of universal wheels 15 are installed at the bottom of the lower group frame 13, which can be used to place the device and adjust the position to improve the convenience of movement.

[0056] Optionally, in some embodiments, see Figure 8-Figure 11, a sealing ring 63 is fixedly mounted on the top of the shell 61, and two symmetrically distributed fixing frames 64 are fixedly mounted on the inner wall of the shell 61. Through holes are provided at the top and bottom of the shell 61, and the shell 61 is fixedly mounted on the top of the spectrometer 2 through the bottom through hole. The movable door 62 is adapted to the top through hole. Pulley 1 66 is rotatably connected to both sides of the movable frame 65. Pulley 1 66 is slidably connected to the slide groove 610 to improve the stability of the movable frame 65 when moving. Limiting inclined surfaces 611 are provided on both sides of the edge of the slide groove 610. A limiting groove 612 adapted to the limiting inclined surface 611 is provided at the outer end of the pulley 2 67 near the middle, and the pulley 2 67 is clamped on the inner side of the slide groove 610 through the limiting groove 612.

[0057] The closed door assembly 6 in this solution is arranged above the spectrometer 2 to replace the traditional fixed door, so that it can be opened and closed automatically, reducing the manual operation, and can also cooperate with the object moving assembly 4 to form an automated operation. Through holes are opened at the top and bottom of the shell 61. The through hole at the top is mainly used to cooperate with the movable door 62 to form a seal, while the through hole at the bottom is matched with 53. The lead chamber 23 is surrounded by the through hole and fixed to its outer enclosure to form a fixed and sealed state. The two fixing frames 64 are the main guiding components, and the two fixing frames 64 are the main guiding components. The frame 64 is symmetrically fixed on the inner side wall of the shell 61, and each fixed frame 64 is provided with a slide groove 610. The slide groove 610 and the fixed frame 64 are both L-shaped, so that the pulley 67 can slide in an L-shaped path when sliding along the path of the slide groove 610. The sealing ring 63 is fixed to the top of the shell 61. A rubber sealing ring is provided on the top of the sealing ring 63. At the same time, the sealing ring 63 is located around the through hole at the top of the shell 61. When the movable door 62 is located in the through hole at the top of the shell 61, it will abut against the sealing ring 63 to form a seal.

[0058] Two connecting plates 69 are fixed at the bottom end of the movable door 62, and pulley 2 67 is rotatably connected to the outer side of the connecting plate 69, and the connecting plate 69 is slidably connected to the slide groove 610 on the fixed frame 64. At the other side of the connecting plate 69, a connecting rod 68 is rotatably connected, and the other end of the connecting rod 68 is rotatably connected to the outer side of the movable frame 65. That is, the movable door 62 and the movable frame 65 are connected together through the connecting rod 68, and a pulley 1 66 is rotatably connected to the outer side of the movable frame 65. The structure of pulley 1 66 is the same as that of pulley 2 67. Pulley 1 66 is also slidably connected to the slide groove 610 on the fixed frame 64. A driving component 9 is arranged at the bottom end of the movable frame 65, and the driving component 9 is mainly used to push the movable frame 65 to move.

[0059] When it is necessary to close the door, the movable frame 65 is pushed forward by the driving assembly 9, and the movable frame 65 will slide in the slide groove 610 on the fixed frame 64 through the pulley 1 66, and at the same time drive the movable door 62 to move forward through the connecting rod 68, and the movable door 62 can also slide in the slide groove 610 on the fixed frame 64 through the pulley 2 67. When the pulley 2 67 slides to the upward corner of the slide groove 610, the pulley 2 67 will continue to move upward. Since both ends of the connecting rod 68 are rotatably connected, the connecting rod 68 will rotate at this time, so that the movable door 62 can move upward, so that the movable door 62 abuts against the sealing ring 63, and the automatic door closing is completed. When the door is opened, it can return to the original path, so that it can complete the automatic opening and closing of the door.

[0060] It is worth mentioning that limiting slopes 611 are arranged on both sides of the slide groove 610, that is, on the fixing frame 64 surrounding the slide groove 610, so that the edge of the slide groove 610 is arranged in a triangular shape, and a limiting groove 612 is arranged near the middle of the outer surrounding of the pulley 2 67. The limiting groove 612 is concave and just matches the limiting slope 611, so that the pulley 2 67 can be stuck on the inner side of the slide groove 610 through the limiting groove 612 to prevent it from escaping from the slide groove 610, and its stability can be increased when the pulley 2 67 slides upward.

[0061] Optionally, in some embodiments, see Figure 8-Figure 13 The driving assembly 9 includes a servo motor 91, a rotating shaft 92 and a fixed plate 93. The servo motor 91 and the fixed plate 93 are both fixedly mounted on the bottom end of the shell 61. The rotating shaft 92 passes through the fixed plate 93, and both ends of the rotating shaft 92 are rotatably connected to the inner side walls of the shell 61. The output end of the servo motor 91 passes through the fixed plate 93, and the output end of the servo motor 91 is key-connected with a driving pulley 910. The outer end of the rotating shaft 92 is fixedly connected with a passive pulley 912. The driving pulley 910 and the passive pulley 912 are connected through a belt 911.

[0062] The driving assembly 9 also includes a fixed plate 96 and a rack 95. A gear 94 is fixedly installed on the outer end of the rotating shaft 92. The rack 95 is meshed with the gear 94 and fixedly installed on the bottom end of the movable frame 65. The fixed plate 96 is fixedly installed on the bottom end of the shell 61. The outer end of the fixed plate 96 is fixedly connected to a clamping frame 97. Two limit blocks 98 are fixedly installed on the bottom end of the clamping frame 97. Movable grooves 99 that are compatible with the limit blocks 98 are opened on both sides of the rack 95. The movable grooves 99 are slidably connected to the limit blocks 98, and the rotating shaft 92 passes through the fixed plate 96.

[0063] The driving assembly 9 in this scheme is mainly used to drive the closed door assembly 6. The servo motor 91 is a power source. The servo motor 91 is fixedly installed inside the shell 61. The fixing plate 93 is also fixed inside the shell 61. The output end of the servo motor 91 passes through the fixing plate 93, and the output end is keyed to the driving pulley 910, and the rotating shaft 92 also passes through the fixing plate 93. At the same time, both ends of the rotating shaft 92 are horizontally arranged inside the shell 61 and are rotatably connected to the two side walls of the servo motor 91. A passive pulley 912 is fixedly installed on the outer end of the rotating shaft 92. The passive pulley 912 and the driving pulley 910 are connected together through a belt 911 installed on the outer end. When the servo motor 91 drives the driving pulley 910 to rotate, the belt 911 can drive the passive pulley 912 to rotate, and the rotating shaft 92 will be driven to rotate by the passive pulley 912.

[0064] A gear 94 is fixed to the outer end of the rotating shaft 92, and a fixed plate 96 is fixed to the inner bottom end of the servo motor 91, and a clamping frame 97 is fixed to the outer end of the fixed plate 96. Two limit blocks 98 are fixed to the bottom of the clamping frame 97. The rack 95 is fixed to the bottom of the movable frame 65 and can be fixed by welding. The rack 95 matches the gear 94 and is meshed together. Movable grooves 99 are provided on both sides of the rack 95. The limit blocks 98 are slidably connected to the movable grooves 99. The rack 95 can slide at the bottom of the clamping frame 97 through the movable grooves 99. Therefore, when the rotating shaft 92 rotates, the rack 95 meshed with the gear 94 will be driven, and the driven rack 95 will slide at the bottom of the clamping frame 97, thereby driving the movable frame 65 to move back and forth, so that the movable door 62 can be automatically opened and closed.

[0065] Optionally, in some embodiments, see Figure 1-Figure 7 The moving component 8 includes a mounting plate 81, which is fixedly mounted on the outer end of one of the side baffles 12 by bolts, a cylinder 84 is fixedly mounted on the bottom end of the mounting plate 81, a piston rod 85 is installed inside the cylinder 84, a reverse thrust plate 83 is fixedly mounted on the output end of the piston rod 85, and a driving plate 82 is fixedly mounted on the outer end of the reverse thrust plate 83.

[0066] The movable component 3 3 includes a servo motor 31, a passive pulley 34, a movable plate 35 and a mounting plate 311. The servo motor 31 is fixedly mounted on the top of the movable plate 35. The output end of the servo motor 31 is keyed to a driving pulley 33. The passive pulley 34 is rotatably mounted on the top of the movable plate 35. The driving pulley 33 and the passive pulley 34 are connected by a belt 32. A clamping plate 310 is fixedly mounted on the outer end of the belt 32. The clamping plate 310 is fixedly connected to the mounting plate 311. The moving paths of the mounting plate 311 and the movable plate 35 are vertically arranged. The driving plate 82 is connected to the movable plate 35 by bolts. The movable plate 35 moves by pushing the driving plate 82 through the piston rod 85.

[0067] The moving component three 3 also includes a slide rail two 39 and a slide rail one 37. The bottom end of the movable plate 35 is fixedly installed with a slider two 38 and a slider one 36 respectively. The slide rail two 39 is fixedly installed on the top of the mounting plate two 81, and the slide rail one 37 is fixedly installed on the top of the storage plate 14. The slider two 38 is slidably connected with the slide rail two 39, and the slider one 36 is slidably connected with the slide rail one 37. The top of the movable plate 35 is fixedly installed with a slide rail three 312, and the bottom end of the mounting plate one 311 is fixedly installed with a slider three 313, and the slider three 313 is slidably connected with the slide rail three 312. The moving component one 4 includes a cylinder one 41, and the cylinder one 41 is fixedly installed on the outer end of the mounting plate one 311. A piston rod one 42 is installed inside the cylinder one 41, and a vacuum suction cup 43 is fixedly installed on the output end of the piston rod one 42. The vacuum suction cup 43 sucks up the sample box 5 and moves it through an external cylinder device.

[0068] The moving component 2 8, the moving component 3 3 and the object moving component 1 4 in this scheme cooperate with each other, and are mainly used to drive the vacuum suction cup 43 to perform three-axis displacement. The mounting plate 2 81 is fixed on one of the side baffles 12 and can be fixed by bolts. The mounting plate 2 81 is immovable and is mainly used to carry the moving component 3 3 and the object moving component 1 4. A cylinder 2 84 is fixedly installed at the bottom of the mounting plate 2 81 by a clamp. The cylinder 2 84 needs to be driven by an external cylinder. The piston rod 2 85 installed inside the cylinder 2 84 moves back and forth by the pressure provided by the external cylinder to drive the moving component 3 3. A reverse thrust plate 83 is fixed at the output end of the piston rod 2 85, that is, the end away from the cylinder 2 84. The outer end of the reverse thrust plate 83 is fixed to the driving plate 82. The reverse thrust plate 83 and the driving plate 82 are vertically arranged, and the driving plate 82 is parallel to the mounting plate 2 81. The piston rod 2 85 is driven by the external cylinder of the cylinder 2 84, so that the driving plate 82 moves.

[0069] The movable plate 35 is connected to the driving plate 82 by bolts, so that it is driven by the driving plate 82. A servo motor 31 is fixedly installed on the top of the movable plate 35. The output end of the servo motor 31 is keyed to the driving pulley 33. The passive pulley 34 is rotatably installed on the top of the movable plate 35 through a bearing. The passive pulley 34 and the driving pulley 33 are connected through a belt 32 transmission. Through the cooperation of the driving pulley 33 and the passive pulley 34, the belt 32 can be rotated around the driving pulley 33 and the passive pulley 34. The outer end of the belt 32 is fixed with a clamping plate 310 by bolts. When the belt 32 rotates, the clamping plate 310 will move with it, and the outer end of the clamping plate 310 is fixed with a mounting plate 311, so that the mounting plate 311 moves with the clamping plate 310.

[0070] At the bottom end of the movable plate 35, a slider 1 36 and a slider 2 38 are fixedly installed respectively, wherein the slider 1 36 is installed by an extension bracket so that the height of the slider 1 36 is lower than that of the slider 2 38, and the slide rail 2 39 is fixed on the mounting plate 2 81, and the slide rail 1 37 matched with the slider 1 36 is fixed on the storage plate 14. Through the sliding connection between the slider 2 38 and the slide rail 2 39, and the sliding connection between the slide rail 1 37 and the slider 1 36, when the movable plate 35 is driven by the moving component 2 8, it can slide stably and also play a supporting role, and the slider 3 313 is fixed on the bottom of the mounting plate 1 311, and the slide rail 3 312 matched with the slider 313 is fixed on the movable plate 35, thereby playing a role in assisting the movement of the mounting plate 1 311, and through the cooperation between the moving component 3 3 and the moving component 2 8, the moving component 1 4 can move on two axes.

[0071] The cylinder 41 is fixed to the outer end of the mounting plate 311 through a connecting ring. The cylinder 41 is the same as the cylinder 84, and both require an external cylinder to provide a power source. A piston rod 42 is also installed inside the cylinder 41, and is used for movement like the piston rod 85. The cylinder 41 is installed vertically, so the piston rod 42 can drive the vacuum suction cup 43 installed at its end to move up and down. The vacuum suction cup 43 also requires an external cylinder. The vacuum suction cup 43 is a device for adsorbing and fixing objects, which uses negative pressure, i.e. vacuum, to generate suction. By fitting the suction cup to the surface of the object, the suction cup And generate vacuum, so that the suction cup can be firmly fixed on the surface of the object, the moving component 2 8 is mainly used for movement in the Y-axis direction, the moving component 3 is used for movement in the X-axis direction, and the cylinder 1 41 can be used for movement in the Z-axis direction. Through their cooperation, the vacuum suction cup 43 can suck up the sample box 5 on the rack 7, and then the closed door component 6 automatically opens and closes the door, so that the sample box 5 can be automatically placed in the spectrometer 2 for inspection. Automatic placement of samples can improve detection efficiency, and there is no need to manually place samples one by one, which can save a lot of time and reduce labor costs.

[0072] Optionally, in some embodiments, see Fig.14 and Fig.15 The energy spectrometer 2 includes a support frame 21, an inner sleeve 24 is fixedly mounted on the top of the support frame 21, a plurality of lead chambers 23 are arranged around the outer shell of the inner sleeve 24, a detector 22 is mounted on the bottom of the support frame 21, and the probe of the detector 22 extends into the inner sleeve 24.

[0073] The lead chamber 23 includes an outer protective layer 231, which is made of stainless steel. The interior of the outer protective layer 231 is annularly hollow. Multiple lead layers 232 are installed inside the outer protective layer 231. Coatings 233 are arranged between the multiple lead layers 232. The coating 233 is made of barium sulfate. A plurality of slots 234 are opened at the outer end of the outer protective layer 231, and a plug rod 235 is detachably installed inside the slot 234.

[0074] The energy spectrometer 2 in this scheme is a detection device based on the interaction between gamma rays and detector materials. When gamma rays pass through the detector, electron-hole pairs or photoelectrons are generated in the detector, and the number of these electron-hole pairs or photoelectrons is proportional to the energy of the gamma rays. Through the preamplifier and multi-channel analyzer, these signals are converted into digital form and classified according to energy channels to finally form an energy spectrum.

[0075] The moving component 3, the moving component 1, and the moving component 2 are all for the purpose of automatically placing and picking up the test object. An inner sleeve 24 is fixed at the top of the lifting frame 21, and the interior of the inner sleeve 24 is hollow. A detector 22 is installed at the bottom of the lifting frame 21. The probe part of the detector 22 extends to the interior of the inner sleeve 24. The probe of the detector 22 is a NaI (Tl) probe detector. When the gamma ray passes through the NaI (Tl) crystal, it will be converted into a fluorescent signal. The fluorescent signal is collected by a photomultiplier tube and converted into an electric pulse signal. The peak value of the electric pulse is proportional to the energy of the incident gamma photon. After the electric pulse signal is amplified and formed, it is collected and processed by an external computer to form an energy spectrum. The existence and activity of different radioactive nuclides can be determined through the energy spectrum, thereby completing the detection. In the outer enclosure of the inner sleeve 24, a plurality of lead chambers 23 are set. The lead chambers 23 are mainly used to isolate the inner sleeve 24 from the outside world, prevent the radiation in the external environment from affecting it, and improve the detection accuracy.

[0076] The lead chamber 23 is mainly made of an outer protective layer 231, which is made of stainless steel. The interior of the outer protective layer 231 is in a hollow annular shape. A multi-layer wound lead layer 232 is arranged inside the outer protective layer 231. Lead has a high density and is a commonly used radiation protection material, which can improve its ability to protect against external radiation. At the same time, a coating 233 is applied between each layer of the lead layer 232. The coating 233 has a high density and chemical stability, so that it can effectively block the penetration of rays. It can cooperate with the lead layer 232 and the multi-layer surrounding structure formed by the lead layer 232 to further enhance the resistance to interference from external environmental radiation, thereby improving the accuracy of detection.

[0077] Four slots 234 are provided on the outside of the outer protective layer 231, and an insertion rod 235 is inserted into each slot 234. Since the lead chamber 23 is movably mounted on the outer enclosure of the inner sleeve 24, the number of lead chambers 23 can be selected according to needs to achieve different heights. The lead chamber 23 can be lifted by holding the insertion rod 235, which is convenient for disassembly and installation.

[0078] Working principle: When the device is used for inspection, the driving assembly 9 is first required to drive the closed door assembly 6 to open the movable door 62. When the rotating shaft 92 rotates, the rack 95 meshing with the gear 94 will be driven, and the driven rack 95 will slide at the bottom of the clamping frame 97, thereby driving the movable frame 65 to move forward and backward. When the movable frame 65 moves backward, the movable frame 65 will slide in the slide groove 610 on the fixed frame 64 through the pulley 1 66, and at the same time drive the movable door 62 to move downward through the connecting rod 68. When the pulley 2 67 slides to the upward corner of the slide groove 610, since both ends of the connecting rod 68 are rotatably connected, the connecting rod 68 will rotate at this time, so that the movable door 62 can move backward, completing the automatic door opening;

[0079] At this time, the moving component 2 8 moves in the Y-axis direction, the moving component 3 is used to move in the X-axis direction, and the cylinder 1 41 can be used to move in the Z-axis direction. Through their cooperation, the vacuum suction cup 43 can suck up the sample box 5 on the rack 7, and then the closed door component 6 automatically opens and closes the door, so that the sample box 5 can be automatically placed in the spectrometer 2 for inspection. Automatic placement of samples can improve detection efficiency, and there is no need to place samples manually one by one.

Claims

1. A fully automatic low-background gamma spectrometer for building materials, characterized by: include: A working frame (1), the working frame (1) comprising an upper group frame (11) and a lower group frame (13), the upper group frame (11) and the lower group frame (13) being connected via a storage plate (14); An energy spectrometer (2), wherein a closed door assembly (6) is arranged at the top of the energy spectrometer (2), and a driving assembly (9) is arranged inside the closed door assembly (6); A second moving component (8) is installed at the top of the storage plate (14), a third moving component (3) is arranged at the top of the second moving component (8), and a first moving component (4) is arranged at the outer end of the third moving component (3); The closed door assembly (6) comprises a shell (61), a movable frame (65), a sealing ring (63) and a movable door (62); two symmetrically distributed fixed frames (64) are fixedly mounted on the inner side wall of the shell (61); two connecting plates (69) are fixedly mounted on the bottom end of the movable door (62); the outer sides of the two connecting plates (69) are both rotatably connected to a second pulley (67); the connecting plate (69) is rotatably connected to a connecting rod (68) on a side away from the second pulley (67); one end of the connecting rod (68) is rotatably connected to the outer end of the movable frame (65); a sliding groove (610) is provided at the outer end of the fixed frame (64); the second pulley (67) is slidably connected to the sliding groove (610); and the path of the sliding groove (610) is arranged in an L shape; The movable frame (65) is driven by the driving assembly (9) to move the movable door (62), and when the second pulley (67) slides along the path of the slide groove (610) to the end, the movable door (62) is pushed upward by the connecting rod (68) to fit with the sealing ring (63) to form a seal.

2. A fully automatic building material low background gamma spectrometer according to claim 1, characterized in that: The upper assembly frame (11) is surrounded by a glass window, a plurality of universal wheels (15) are installed at the bottom of the lower assembly frame (13), a storage rack (7) is fixedly installed at the top of the storage plate (14), a plurality of sample boxes (5) are arranged at the top of the storage rack (7), two side baffles (12) are fixedly installed at the top of the storage plate (14), and a notch that matches the shell (61) is arranged at the outer end of the storage plate (14).

3. A fully automatic building material low background gamma spectrometer according to claim 1, characterized in that: The sealing ring (63) is fixedly mounted on the top of the shell (61); the top and bottom of the shell (61) are provided with through holes, and the shell (61) is fixedly mounted on the top of the spectrometer (2) through the bottom through hole; the movable door (62) is matched with the top through hole; both sides of the movable frame (65) are rotatably connected with pulley 1 (66); the pulley 1 (66) is slidably connected with the slide groove (610) to improve the stability of the movable frame (65) when moving; both sides of the edge of the slide groove (610) are provided with limiting inclined surfaces (611); the outer end of the pulley 2 (67) is provided with a limiting groove (612) matched with the limiting inclined surface (611) near the middle; the pulley 2 (67) is clamped on the inner side of the slide groove (610) through the limiting groove (612).

4. The fully automatic low-background gamma spectrometer for building materials according to claim 1, characterized in that: The driving assembly (9) comprises a second servo motor (91), a rotating shaft (92) and a first fixed plate (93); the second servo motor (91) and the first fixed plate (93) are both fixedly mounted at the bottom end of the housing (61); the rotating shaft (92) passes through the first fixed plate (93); and both ends of the rotating shaft (92) are rotatably connected to the inner side walls of the housing (61); the output end of the second servo motor (91) passes through the first fixed plate (93); and the output end of the second servo motor (91) is key-connected to a second driving pulley (910); the outer end of the rotating shaft (92) is fixedly connected to a second passive pulley (912); and the second driving pulley (910) and the second passive pulley (912) are connected via a second belt (911) for transmission.

5. A fully automatic low-background gamma spectrometer for building materials according to claim 4, characterized in that: The driving assembly (9) further comprises a second fixing plate (96) and a rack (95); a gear (94) is fixedly mounted on the outer end of the rotating shaft (92); the rack (95) is meshingly connected with the gear (94), and the rack (95) is fixedly mounted on the bottom end of the movable frame (65); the second fixing plate (96) is fixedly mounted on the bottom end of the housing (61); a clamping frame (97) is fixedly connected to the outer end of the second fixing plate (96); two limit blocks (98) are fixedly mounted on the bottom end of the clamping frame (97); movable grooves (99) adapted to the limit blocks (98) are formed on both sides of the rack (95); the movable grooves (99) are slidably connected to the limit blocks (98); and the rotating shaft (92) passes through the second fixing plate (96).

6. The fully automatic low-background gamma spectrometer for building materials according to claim 1, characterized in that: The second moving assembly (8) comprises a second mounting plate (81), the second mounting plate (81) being fixedly mounted on the outer end of one of the side baffles (12) by means of bolts, a second cylinder (84) being fixedly mounted on the bottom end of the second mounting plate (81), a second piston rod (85) being mounted inside the second cylinder (84), a reverse thrust plate (83) being fixedly mounted on the output end of the second piston rod (85), and a driving plate (82) being fixedly mounted on the outer end of the reverse thrust plate (83).

7. The fully automatic low-background gamma spectrometer for building materials according to claim 6, characterized in that: The moving assembly three (3) comprises a servo motor one (31), a passive pulley one (34), a movable plate (35) and a mounting plate one (311); the servo motor one (31) is fixedly mounted on the top of the movable plate (35); the output end of the servo motor one (31) is key-connected with a driving pulley one (33); the passive pulley one (34) is rotatably mounted on the top of the movable plate (35); the driving pulley one (33) and the passive pulley one (34) are connected by a belt one (32); a clamping plate (310) is fixedly mounted on the outer end of the belt one (32); the clamping plate (310) is fixedly connected to the mounting plate one (311); the moving paths of the mounting plate one (311) and the movable plate (35) are arranged vertically; the driving plate (82) is connected to the movable plate (35) by bolts; the movable plate (35) moves by pushing the driving plate (82) by a piston rod two (85).

8. The fully automatic low-background gamma spectrometer for building materials according to claim 7, characterized in that: The movable assembly three (3) further comprises a second slide rail (39) and a first slide rail (37); the bottom end of the movable plate (35) is respectively fixedly mounted with a second slide rail (38) and a first slide rail (36); the second slide rail (39) is fixedly mounted on the top end of the mounting plate two (81); the first slide rail (37) is fixedly mounted on the top end of the storage plate (14); the second slide rail (38) is slidably connected to the second slide rail (39); the first slide rail (36) is slidably connected to the first slide rail (37); the top end of the movable plate (35) is fixedly mounted with a third slide rail (31 2), a slider three (313) is fixedly mounted on the bottom end of the mounting plate one (311), and the slider three (313) is slidably connected to the slide rail three (312), and the object moving component one (4) includes a cylinder one (41), and the cylinder one (41) is fixedly mounted on the outer end of the mounting plate one (311), and a piston rod one (42) is installed inside the cylinder one (41), and a vacuum suction cup (43) is fixedly mounted on the output end of the piston rod one (42), and the vacuum suction cup (43) sucks up the sample box (5) and moves it through an external cylinder device.

9. The fully automatic low-background gamma spectrometer for building materials according to claim 1, characterized in that: The energy spectrometer (2) comprises a support frame (21), an inner sleeve (24) is fixedly mounted on the top of the support frame (21), a plurality of lead chambers (23) are arranged in an outer shell of the inner sleeve (24), and a detector (22) is mounted on the bottom of the support frame (21), a probe of the detector (22) extends into the interior of the inner sleeve (24).

10. The fully automatic low-background gamma spectrometer for building materials according to claim 9, characterized in that: The lead chamber (23) comprises an outer protective layer (231), the outer protective layer (231) is made of stainless steel, the interior of the outer protective layer (231) is annularly hollow, multiple lead layers (232) are installed inside the outer protective layer (231), coatings (233) are arranged between the multiple lead layers (232), the coatings (233) are made of barium sulfate, and multiple slots (234) are opened at the outer end of the outer protective layer (231), and plug rods (235) are detachably installed inside the slots (234).

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