Ultralow background solution flash spectrometer

Abstract

The utility model discloses an ultralow background liquid flash spectrometer which comprises a detector at the upper part and a control cabinet with a built-in control system at the lower part, the horizontal rotary sample injection device comprises a horizontal sample injection fixing frame fixed below a top plate of the control cabinet and a sample tray which is mounted on the horizontal sample injection fixing frame and is controlled to rotate by a motor module, a sample box for placing a sample bottle is arranged in the circumferential direction of the sample tray, and a sample injection hole communicated with a sample injection slide way at the bottom of the detector is formed in the top plate of the control cabinet; a vertical sample introduction device for vertically jacking a sample bottle into the sample introduction slide way through a sample introduction hole is arranged below the horizontal rotary sample introduction device, and a light shielding device is arranged at the sample introduction hole of the top plate of the control cabinet. By arranging the horizontal rotary sampling device and the vertical sampling device, multi-sample automatic detection is realized, and meanwhile, the light shielding device is arranged at the sampling hole, so that background reduction caused by light interference during measurement is effectively avoided, and the precision of a measurement result can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive measurement equipment, in particular to an ultra-low background liquid scintillation spectrometer. Background Art

[0002] Liquid scintillation spectrometers are widely used in industry, agriculture, biomedicine, environmental science, archaeology and geology. Liquid scintillation spectrometers can be used to measure α and β radionuclides, such as 3 H. 14 C. 32 P. 90 Sr, total alpha, total beta, etc.

[0003] The current liquid scintillation spectrometer can usually only test one sample at a time, and each time the sample needs to be manually sent and sampled. During the measurement process, the liquid scintillation spectrometer is extremely sensitive to light. The process is cumbersome and it is easy to contaminate the sample, resulting in a decrease in test accuracy.

[0004] Therefore, how to provide a liquid scintillation spectrometer device with a high degree of automation, the ability to accommodate multi-sample detection, and high measurement accuracy is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to address the deficiencies in the prior art, the utility model provides an ultra-low background liquid scintillation spectrometer, which realizes automatic detection of multiple samples by arranging a horizontal rotating sampling device and a vertical sampling device. At the same time, a light shielding device is arranged at the sampling hole to effectively avoid light interference during measurement and reduce the background, which can greatly improve the accuracy of the measurement results.

[0006] The utility model embodiment provides the following scheme:

[0007] The utility model embodiment provides an ultra-low background liquid scintillation spectrometer, comprising an upper detector and a lower control cabinet with a built-in control system, a horizontal rotating sampling device is arranged under the detector, the horizontal rotating sampling device comprises a horizontal sampling fixing frame fixed under the top plate of the control cabinet and a sample tray installed on the horizontal sampling fixing frame and controlled to rotate by a motor module, a sample box for placing sample bottles is arranged circumferentially of the sample tray, a sampling hole connected to the sampling slide at the bottom of the detector is arranged on the top plate of the control cabinet, a vertical sampling device for vertically pushing the sample bottle into the sampling slide through the sampling hole is arranged under the horizontal rotating sampling device, and a light shielding device is arranged at the sampling hole of the top plate of the control cabinet.

[0008] In an optional embodiment, the vertical injection device adopts a sliding table module.

[0009] In an alternative embodiment, the light-shielding device includes a light-shielding device fixing bracket fixed to the top plate of the control cabinet. A slide rail is provided on the light-shielding device fixing bracket, and a first gripper and a second gripper are installed on the slide rail. Semi-circular gripping portions are respectively provided at the front ends of the first gripper and the second gripper. A first silicone half-ring and a second silicone half-ring are respectively provided on the gripping portion of the first gripper and the gripping portion of the second gripper. When the first gripper and the second gripper slide and close along the slide rail, the first silicone half-ring and the second silicone half-ring close to form a closed silicone ring.

[0010] In an alternative embodiment, the first gripper and the second gripper are driven to slide along the slide rail by a rack and pinion mechanism installed on the light-shielding device fixing bracket.

[0011] In an alternative embodiment, the rack and pinion mechanism is controlled by a motor installed on the light-shielding device fixing bracket to operate.

[0012] In an alternative embodiment, the light-shielding device fixing bracket is provided with a sliding limit strip parallel to the slide rail.

[0013] In an alternative embodiment, the light-shielding device fixing bracket is provided with a photoelectric switch and a photoelectric switch baffle.

[0014] In an alternative embodiment, a constant temperature air conditioner is provided inside the control cabinet.

[0015] In an alternative embodiment, locking wheels are provided at the bottom of the control cabinet.

[0016] In an alternative embodiment, a serial label is provided on the sample bottle.

[0017] The beneficial effects of the present utility model based on its technical solution are as follows:

[0018] (1) An ultra-low background liquid scintillation spectrometer provided by the present utility model realizes automated detection of multiple samples by setting a horizontal rotary sample injection device and a vertical sample injection device;

[0019] (2) In an ultra-low background liquid scintillation spectrometer provided by the present utility model, the light-shielding device has a compact and efficient structure. When the vertical sample injection device pushes the sample bottle into the sample injection slideway, the silicone ring can effectively wrap the sample bottle, effectively avoiding light interference during measurement and reducing the background, and can greatly improve the accuracy of the measurement result;

[0020] (3) In an ultra-low background liquid scintillation spectrometer provided by the present utility model, the sliding limit strip of the light-shielding device can assist in restricting the sliding range of the first gripper and the second gripper;

[0021] (4) In an ultra-low background liquid scintillation spectrometer provided by the present utility model, the combination of the photoelectric switch and the photoelectric switch baffle of the light-shielding device can be used to identify the position state of the sample bottle. When the sample bottle is translated below the sample injection slideway and blocks the photoelectric switch baffle, the photoelectric switch can be triggered to control the motor to drive the gear rack to move, driving the first clamp and the second clamp to move towards each other to prepare for sample injection light shielding, realizing the overall automation of the device;

[0022] (5) A constant temperature air conditioner can be set in the control cabinet of an ultra-low background liquid scintillation spectrometer provided by the present utility model to ensure the sample quality;

[0023] (6) Sequence labels can be set on the sample bottles of an ultra-low background liquid scintillation spectrometer provided by the present utility model to facilitate automatic identification and data management. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of this specification. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the overall internal structure of an ultra-low background liquid scintillation spectrometer provided by the present utility model.

[0026] Figure 2 It is a schematic sectional view of an ultra-low background liquid scintillation spectrometer provided by the present utility model.

[0027] Figure 3 It is a three-dimensional schematic sectional view of an ultra-low background liquid scintillation spectrometer provided by the present utility model.

[0028] Figure 4 It is a schematic diagram of the horizontal rotary sample injection device of an ultra-low background liquid scintillation spectrometer provided by the present utility model.

[0029] Figure 5 It is a schematic diagram of the light-shielding device.

[0030] Figure 6 It is an installation schematic diagram of the light-shielding device.

[0031] Figure 7 It is a schematic diagram of the overall external appearance of an ultra-low background liquid scintillation spectrometer provided by the present utility model.

[0032] In the figure: 1 - detector, 2 - horizontal rotary sampling device, 21 - horizontal sampling fixing bracket, 22 - sample tray, 23 - sample box, 24 - sample bottle, 25 - sequence label, 26 - motor module, 3 - vertical sampling device, 4 - control cabinet, 5 - locking wheel, 6 - sampling chute, 7 - light-shielding device, 71 - light-shielding device fixing bracket, 72 - motor, 73 - sliding limit bar, 74 - rack and pinion mechanism, 75 - slide rail, 76 - second silicone semi-ring, 77 - second gripper, 78 - first gripper, 79 - first silicone semi-ring, 710 - photoelectric switch baffle, 711 - photoelectric switch. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the embodiments of the present invention.

[0034] Refer to Figures 1 to 7 , this embodiment provides an ultra-low background liquid scintillation spectrometer, including a detector 1 at the upper part and a control cabinet 4 with a control system built therein at the lower part. A constant temperature air conditioner is provided inside the control cabinet, and locking wheels 5 are provided at the bottom of the control cabinet.

[0035] A horizontal rotary sampling device 2 is provided under the detector. The horizontal rotary sampling device includes a horizontal sampling fixing bracket 21 fixed under the top plate of the control cabinet and a sample tray 22 installed on the horizontal sampling fixing bracket and controlled to rotate by a motor module 26. A sample box 23 for placing sample bottles 24 is provided circumferentially on the sample tray. A sequence label 25 can be set on the sample bottle.

[0036] The top plate of the control cabinet is provided with a sampling hole communicating with the sampling chute 6 at the bottom of the detector. A vertical sampling device 3 for vertically pushing the sample bottle into the sampling chute 6 through the sampling hole is provided under the horizontal rotary sampling device, and a light-shielding device 7 is provided at the sampling hole of the top plate of the control cabinet.

[0037] The vertical sampling device adopts a slide table module. When the horizontal rotary sampling device rotates one of the sample bottles to be directly below the sampling chute and the sampling hole of the detector, the sampling ejector rod of the slide table module can vertically push the sample bottle into the sampling chute through the sampling hole.

[0038] The described light-shielding device includes a light-shielding device fixing bracket 71 fixed to the top plate of the control cabinet. There is a slide rail 75 on the light-shielding device fixing bracket, and a first gripper 78 and a second gripper 77 are installed on the slide rail. The front ends of the first gripper and the second gripper are respectively provided with semi-circular gripping parts. The gripping part of the first gripper and the gripping part of the second gripper are respectively provided with a first silicone half-ring 79 and a second silicone half-ring 76. When the first gripper and the second gripper slide and close along the slide rail, the first silicone half-ring and the second silicone half-ring close to form a closed silicone ring.

[0039] The inner wall of the described silicone ring has a multi-layer spiral structure. When the sample bottle is pushed in, it can be effectively clamped to avoid light transmission, ensuring the detection effect and accuracy.

[0040] The first gripper and the second gripper are driven to slide along the slide rail by a rack and pinion mechanism 74 installed on the light-shielding device fixing bracket. The rack and pinion mechanism is controlled by a motor 72 installed on the light-shielding device fixing bracket. The light-shielding device has a compact and efficient structure. When the vertical sampling device pushes the sample bottle into the sampling chute, the silicone ring can effectively wrap the sample bottle, avoiding light pollution of the sample and greatly improving the accuracy of the measurement result.

[0041] The light-shielding device fixing bracket is provided with a sliding limit strip 73 parallel to the slide rail, as well as a photoelectric switch 711 and a photoelectric switch baffle 710.

[0042] The working process of the present utility model is as follows:

[0043] (1) The horizontal rotary sampling device 2 rotates the sample bottle 24 to be detected to directly below the sampling chute 6 of the detector 1.

[0044] (2) The combination of the photoelectric switch and the photoelectric switch baffle of the light-shielding device identifies the position state of the sample bottle. When the sample bottle is translated to below the sampling chute and blocks the photoelectric switch baffle, the photoelectric switch can be triggered to control the motor to drive the rack and pinion movement, driving the first gripper 78 and the second gripper 79 to move towards each other and clamp, so that the first silicone half-ring 79 and the second silicone half-ring 76 are combined into a complete silicone ring.

[0045] (4) The upper and lower edges of the silicone ring are in virtual contact with the bottom of the sampling chute and the top of the sample bottle 24 respectively.

[0046] (3) The sampling ejector rod of the vertical sampling device 3 ejects upward, sending the sample bottle 24 into the detector through the sampling chute. During the whole process, the silicone ring tightly wraps the sample bottle, effectively avoiding light pollution of the sample bottle.

[0047] An ultra-low background liquid scintillation spectrometer provided by the utility model realizes automated detection of multiple samples by setting a horizontal rotation sampling device and a vertical sampling device. At the same time, a light-shielding device is arranged at the sampling hole, effectively avoiding light interference during measurement and reducing the background, and can greatly improve the accuracy of the measurement result.

Claims

1. An ultra-low background liquid scintillation spectrometer, comprising an upper detector (1) and a lower control cabinet (4) with a built-in control system, characterized in that: A horizontal rotating sample injection device (2) is provided under the detector, and the horizontal rotating sample injection device comprises a horizontal sample injection fixing frame (21) fixed under the top plate of a control cabinet and a sample tray (22) mounted on the horizontal sample injection fixing frame and controlled to rotate by a motor module (26). A sample box (23) for placing a sample bottle (24) is provided around the sample tray. The top plate of the control cabinet is provided with a sample injection hole connected to a sample injection slideway (6) at the bottom of the detector. A vertical sample injection device (3) for vertically pushing the sample bottle into the sample injection slideway through the sample injection hole is provided under the horizontal rotating sample injection device. A light shielding device (7) is provided at the sample injection hole on the top plate of the control cabinet.

2. The ultra-low background liquid scintillation spectrometer according to claim 1, characterized in that: The vertical sample introduction device adopts a slide module.

3. The ultra-low background liquid scintillation spectrometer according to claim 1, characterized in that: The light-shielding device comprises a light-shielding device fixing frame (71) fixed to the top plate of the control cabinet, the light-shielding device fixing frame is provided with a slide rail (75), a first clamp (78) and a second clamp (77) are installed on the slide rail, the front ends of the first clamp and the second clamp are respectively provided with a semicircular gripping portion, the gripping portion of the first clamp and the gripping portion of the second clamp are respectively provided with a first silicone half circle (79) and a second silicone half circle (76), when the first clamp and the second clamp slide and close along the slide rail, the first silicone half circle and the second silicone half circle close to form a closed silicone circle.

4. The ultra-low background liquid scintillation spectrometer according to claim 3, characterized in that: The first gripper and the second gripper are driven to slide along the slide rail by a rack and pinion mechanism (74) installed on a light shielding device fixing frame.

5. The ultra-low background liquid scintillation spectrometer according to claim 4, characterized in that: The rack and pinion mechanism is controlled and operated by a motor (72) installed on a light shielding device fixing frame.

6. The ultra-low background liquid scintillation spectrometer according to claim 3, characterized in that: The light-shielding device fixing frame is provided with a sliding limit strip (73) parallel to the slide rail.

7. The ultra-low background liquid scintillation spectrometer according to claim 3, characterized in that: The light-shielding device fixing frame is provided with a photoelectric switch (711) and a photoelectric switch blocking piece (710).

8. The ultra-low background liquid scintillation spectrometer according to claim 1, characterized in that: A constant temperature air conditioner is arranged inside the control cabinet.

9. The ultra-low background liquid scintillation spectrometer according to claim 1, characterized in that: A locking wheel (5) is provided at the bottom of the control cabinet.

10. The ultra-low background liquid scintillation spectrometer according to claim 1, characterized in that: The sample bottle is provided with a sequence label (25).

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