Sample bearing frame of low-background liquid scintillation spectrometer

Abstract

The utility model provides a sample bearing frame of a low background liquid scintillation spectrometer, the sample bearing frame is installed in a sample placing area in the low background liquid scintillation spectrometer, the sample bearing frame at least comprises a sample tray, the sample tray is formed by assembling a plurality of transverse trays along the longitudinal direction or the transverse direction, and each transverse tray is provided with a row of sample grooves for placing sample bottles. Samples can be automatically loaded and withdrawn, and sample loading is convenient; when the sample trays with different specifications need to be replaced, only the transverse trays need to be dismounted and mounted, and the sample trays do not need to be integrally taken out and replaced, so that the compatible design of the sample bottles with different sizes is realized, and any number of sample bottles with different sizes can be placed on the same sample tray; and a client can conveniently load more different types of samples to be detected at one time.

Description

Technical Field

[0001] The utility model relates to the technical field of low-background liquid scintillation spectrometers, in particular to a sample carrier rack of a low-background liquid scintillation spectrometer. Background Art

[0002] Low background liquid scintillation spectrometer is a liquid scintillation counter used for measuring ultra-low level α and β radioactivity. It is mainly used for low level radioactivity in various environmental samples such as water, soil, organisms, aerosols, etc. 3 H. 14 The measurement of nuclides such as C plays an important role in nuclear waste disposal, environmental protection, archaeological dating, medical analysis, food safety, and scientific research. Low-background liquid scintillation spectrometers use liquid scintillators to receive radiation from the substance being measured and convert it into fluorescent photons. Photoelectric devices then amplify and multiply the light to form pulses. Electronic circuits and software then process the light to produce a series of waveforms, completing the measurement of the substance.

[0003] Patent CN118011455A discloses a fully automatic liquid scintillation spectrometer, wherein a sample carrier includes a pull-out device and a guide rail slidably connected to the pull-out device. The pull-out device is provided with a tray for accommodating sample bottles on its end surface facing the sampling device. In this patent, sample bottles are loaded and sampled by manual pulling. However, the sample carrier has the following problems: (1) The sample tray is arranged in two 10*20 layouts, and the tray size is at least 0.65m*1.3m. It needs to be pulled out manually by the handle, which is inconvenient (it needs to be pulled and backed up at the same time). According to ergonomic principles, it is difficult to load sample bottles at a distance of more than 0.5m from the body, resulting in a poor operating experience; (2) To replace sample bottles of different sizes, the entire sample tray must be replaced, which is inconvenient to use. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a sample carrier for a low-background liquid scintillation spectrometer, which can realize automatic loading and unloading of samples, making sample loading convenient. Moreover, when it is necessary to replace sample trays of different specifications, it is only necessary to remove and install the horizontal tray, without having to take out the entire sample tray for replacement, thus achieving a compatible design for sample bottles of different sizes and allowing any number of sample bottles of different sizes to be placed on the same sample tray, making it convenient for customers to load more different types of samples to be tested at one time.

[0005] The technical solutions adopted to achieve the above-mentioned purpose of the utility model are:

[0006] A sample carrier for a low-background liquid scintillation spectrometer is installed in a sample placement area within the low-background liquid scintillation spectrometer. The sample carrier comprises at least a sample tray, which is composed of a plurality of transverse trays assembled longitudinally or transversely. Each transverse tray is provided with a row of sample slots for placing sample bottles.

[0007] The size of the sample slots on the horizontal tray matches the size of the sample bottles, and the external shapes and sizes of the horizontal trays with different sample slot sizes are consistent.

[0008] The sample tray also includes a bottom support plate, and the horizontal tray is assembled and placed on the bottom support plate.

[0009] The two side surfaces of the transverse pallet are corrugated, and guide positioning columns are fixedly provided on the bottom support plate. The transverse pallet is placed on the bottom support plate and clamped between the guide positioning columns.

[0010] RFID tag positions are provided on both end surfaces of the horizontal tray for placing RFID tags; an RFID electronic tag identification module is correspondingly provided on the sample tray for identifying the label content of the RFID tag position.

[0011] A pull-out opening is provided on the side of the sample placement area, and the sample carrier also includes a fixed support plate, a linear slide rail and a driving mechanism. The fixed support plate is horizontally fixed to the bottom of the sample placement area of ​​the low-background liquid scintillation spectrometer; the linear slide rail is fixed to the upper surface of the fixed support plate along the pulling direction; the sample tray is slidably connected to the linear slide rail and faces the pull-out opening; the driving mechanism is connected between the fixed support plate and the sample tray, driving the sample tray to move along the linear slide rail, so that the sample tray automatically enters and exits the sample placement area through the pull-out opening.

[0012] The sample trays are arranged in two groups in parallel, and two groups of linear slide rails are also provided accordingly; the sides of the two groups of sample trays close to the drawer opening are connected with side sealing plates, the driving mechanism is connected to one group of sample trays and drives the sample trays to move, and the other group of sample trays moves synchronously driven by the side sealing plates, and the side sealing plates seal the drawer opening from the outside.

[0013] Each set of linear slides includes two parallel linear slides, and the two linear slides in each set are respectively located at the bottom of both sides of each set of sample trays.

[0014] The driving mechanism includes a driving motor, a driving gear, a driven gear, a synchronous gear belt and a driving block, wherein the driving motor and the driven gear are respectively fixed on the fixed support plate at both ends of the linear slide rail, the driving gear is connected to the rotating shaft of the driving motor, the synchronous gear belt is horizontally sleeved on the driving gear and the driven gear and meshes with the driving gear and the driven gear, the driving block is fixedly connected to the synchronous gear belt, the driving motor drives the synchronous gear belt to rotate, thereby driving the driving block to move; the driving block is fixedly connected to the sample tray.

[0015] The cross section of the linear slide is in the shape of an I. The bottom of the sample tray is connected to a cross section of The slide bar is mounted on the linear slide rail, so that the sample tray is slidably connected to the linear slide rail.

[0016] Compared with the existing technology, the technical solution provided by the present invention has the following advantages: (1) The sample carrier of the low-background liquid scintillation spectrometer provided in the present invention can realize the loading of more than 400 sample positions, and at the same time, the sample tray is driven automatically in and out by the sample driving mechanism, realizing automatic loading and exiting of samples, and convenient sample loading.

[0017] (2) The sample tray in the present invention is assembled from multiple horizontal trays. When a sample tray of a different specification needs to be replaced, only the horizontal tray needs to be removed and installed. There is no need to take out the entire sample tray for replacement, thereby achieving a compatible design for sample bottles of different sizes. In addition, any number of sample bottles of different sizes can be placed on the same sample tray, making it convenient for customers to load more different types of samples to be tested at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a sample carrier for a low-background liquid scintillation spectrometer provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the installation of the sample carrier in the present invention on a low-background liquid scintillation spectrometer;

[0020] Figure 3 This is a schematic structural diagram of the sample tray in the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of a horizontal tray with a sample slot size of 20 mm in the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of a horizontal tray with a sample slot size of 4-7 mm in the present invention;

[0023] Figure 6 This is a schematic diagram of the connection between the bottom support plate and the guide positioning column of the utility model;

[0024] Figure 7 This is a schematic diagram of the connection between the sample tray and the drive mechanism in the present invention;

[0025] In the figure: 1-fixed support plate, 2-linear slide rail, 3-sample tray, 31-bottom support plate, 32-horizontal tray, 33-guide positioning column, 4-driving mechanism, 41-driving motor, 42-driving gear, 43-driven gear, 44-synchronous gear belt, 45-driving block, 5-sample bottle, 6-side sealing plate, 7-low background liquid scintillation spectrometer, 8-RFID tag position. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The structure of the sample carrier of the low-background liquid scintillation spectrometer 7 provided by the present invention is as follows: Figure 1 As shown, the sample carrier is installed in the sample placement area in the low background liquid scintillation spectrometer, as shown in FIG. Figure 2 As shown, in this embodiment, a drawer port is provided on the side of the sample placement area.

[0028] The sample carrier for a low-background liquid scintillation spectrometer provided in this embodiment includes a fixed support plate 1, a linear slide 2, a sample tray 3, and a drive mechanism 4. The fixed support plate is horizontally fixed to the bottom of the sample storage area of ​​the low-background liquid scintillation spectrometer. The linear slide is fixed to the upper surface of the fixed support plate along the pull-out direction. The sample tray is slidably connected to the linear slide and faces the pull-out opening. The drive mechanism is connected between the fixed support plate and the sample tray, driving the sample tray to move along the linear slide, so that the sample tray automatically enters and exits the sample storage area through the pull-out opening. Sample slots for accommodating sample bottles 5 are evenly arranged on the sample tray.

[0029] In this embodiment, two sets of sample trays are arranged side by side, and two corresponding sets of linear slides are provided. The two sets of sample trays are slidably mounted on the two sets of linear slides and move along the two sets of linear slides. Specifically, each set of linear slides includes two parallel linear slides, and the two linear slides in each set are located at the bottom of each set of sample trays on either side, ensuring smooth movement of the sample trays. Side sealing plates 6 are connected to the sides of the two sets of sample trays near the drawer opening. A drive mechanism is connected to one set of sample trays to drive the sample tray's movement, while the other set of sample trays moves synchronously driven by the side sealing plates, which also seal the drawer opening from the outside.

[0030] In this embodiment, the sample tray includes a bottom support plate 31 and a plurality of horizontal trays 32. Figure 3-Figure 5As shown, the horizontal trays are assembled longitudinally or transversely and placed on the bottom support plate. Each horizontal tray is provided with a row of sample slots. Multiple horizontal trays form a matrix array of sample slots for placing samples to be tested. Furthermore, the sides of the horizontal trays are corrugated. Guide locating posts 33 are fixedly mounted on the bottom support plate. The horizontal trays are placed on the bottom support plate and clamped between the guide locating posts, facilitating the positioning and assembly of the horizontal trays. Preferably, the guide locating posts are located at both ends and in the middle of the horizontal trays.

[0031] The sample tray is assembled by horizontal trays. The size of the sample slot on the horizontal tray matches the size of the sample bottle. In actual testing, the common sample bottle sizes are 20mm or 4-7mm or other sizes. Correspondingly, the size of the sample slot on the horizontal tray is 20mm or 4-7mm or other sizes. When it is necessary to test a 20mm sample bottle, a horizontal tray with a sample slot size of 20mm (see Figure 3 ) assembled into a 20mm sample tray, see Figure 1 When the 4-7mm sample bottle needs to be tested, the horizontal tray with a sample slot size of 4-7mm (see Figure 4 ) are assembled to form a sample tray with a specification of 4-7mm. It is also possible to assemble a horizontal tray with a sample slot size of 20mm and a horizontal tray with a sample slot size of 4-7mm, so that any number of sample bottles of different sizes can be placed on the same sample tray, which is convenient for customers to load more different types of samples to be tested at one time. In this embodiment, the external shape and size of the horizontal trays of sample slots of different sizes are consistent, that is, the external shape and size of the horizontal tray of the 20mm sample slot are consistent with the external shape and size of the horizontal tray of the 4-7mm or other size sample slots, see Figure 3 and Figure 4 When you need to replace a sample tray of a different specification, you only need to remove and install the horizontal tray. There is no need to take out the entire sample tray for replacement, thus achieving a compatible design for sample bottles of different sizes.

[0032] In this embodiment, RFID tag positions 8 are provided on both ends of the horizontal tray for placing RFID tags. After a sample bottle is placed in the sample slot on the horizontal tray, the sample bottle information is recorded using the RFID tag, and then the RFID tag is placed in the RFID tag position to avoid errors in sample bottle information caused by the horizontal tray being installed upside down. A corresponding RFID electronic tag recognition module (not shown) is provided on the sample tray to identify the content of the RFID tag position and the size of the sample bottle.

[0033] In this embodiment, the driving mechanism includes a driving motor 41, a driving gear 42, a driven gear 43, a synchronous gear belt 44 and a driving block 45. Figure 7As shown, the driving motor and the driven gear are respectively fixed on the fixed support plate at both ends of the linear slide rail, the driving gear is connected to the rotating shaft of the driving motor, the synchronous gear belt is horizontally sleeved on the driving gear and the driven gear and meshes with the driving gear and the driven gear, the driving block is fixedly connected to the synchronous gear belt, the driving motor drives the synchronous gear belt to rotate, thereby driving the driving block to move; the driving block is fixedly connected to the sample tray.

[0034] In this embodiment, the cross section of the linear guide rail is in the shape of an I, and the bottom of the sample tray is connected to a cross section of The slide bar sits on the linear slide rail, allowing the sample tray to be slidably connected to the linear slide rail to ensure the stability of the sample tray when it is automatically pulled out.

Claims

1. A sample carrier for a low-background liquid scintillation spectrometer, wherein the sample carrier is installed in a sample placement area within the low-background liquid scintillation spectrometer, characterized in that: The sample carrier rack at least comprises a sample tray, which is composed of a plurality of transverse trays assembled longitudinally or transversely, and each transverse tray is provided with a row of sample slots for placing sample bottles.

2. The sample carrier for low-background liquid scintillation spectrometer according to claim 1, characterized in that: The size of the sample slots on the horizontal tray matches the size of the sample bottles, and the external shapes and sizes of the horizontal trays with different sample slot sizes are consistent.

3. The sample carrier for low-background liquid scintillation spectrometer according to claim 1, characterized in that: The sample tray also includes a bottom support plate, and the horizontal tray is assembled and placed on the bottom support plate.

4. The sample carrier for low-background liquid scintillation spectrometer according to claim 3, characterized in that: The two side surfaces of the transverse pallet are corrugated, and guide positioning columns are fixedly provided on the bottom support plate. The transverse pallet is placed on the bottom support plate and clamped between the guide positioning columns.

5. The sample carrier for low-background liquid scintillation spectrometer according to claim 1, characterized in that: Both end surfaces of the horizontal tray are provided with RFID tag positions for placing RFID tags; the sample tray is correspondingly provided with an RFID electronic tag identification module for identifying the label content of the RFID tag position.

6. The sample carrier for low-background liquid scintillation spectrometer according to claim 1, characterized in that: A pull-out opening is provided on the side of the sample placement area, and the sample carrier also includes a fixed support plate, a linear slide rail and a driving mechanism. The fixed support plate is horizontally fixed to the bottom of the sample placement area of ​​the low-background liquid scintillation spectrometer; the linear slide rail is fixed to the upper surface of the fixed support plate along the pulling direction; the sample tray is slidably connected to the linear slide rail and faces the pull-out opening; the driving mechanism is connected between the fixed support plate and the sample tray, driving the sample tray to move along the linear slide rail, so that the sample tray automatically enters and exits the sample placement area through the pull-out opening.

7. The sample carrier for low-background liquid scintillation spectrometer according to claim 6, characterized in that: The sample trays are arranged in two groups in parallel, and two groups of linear slide rails are also provided accordingly; the sides of the two groups of sample trays close to the drawer opening are connected with side sealing plates, the driving mechanism is connected to one group of sample trays and drives the sample trays to move, and the other group of sample trays moves synchronously driven by the side sealing plates, and the side sealing plates seal the drawer opening from the outside.

8. The sample carrier for low-background liquid scintillation spectrometer according to claim 7, characterized in that: Each set of linear slides includes two parallel linear slides, and the two linear slides in each set are respectively located at the bottom of both sides of each set of sample trays.

9. The sample carrier for low-background liquid scintillation spectrometer according to claim 6, characterized in that: The driving mechanism includes a driving motor, a driving gear, a driven gear, a synchronous gear belt and a driving block, wherein the driving motor and the driven gear are respectively fixed on the fixed support plate at both ends of the linear slide rail, the driving gear is connected to the rotating shaft of the driving motor, the synchronous gear belt is horizontally sleeved on the driving gear and the driven gear and meshes with the driving gear and the driven gear, the driving block is fixedly connected to the synchronous gear belt, the driving motor drives the synchronous gear belt to rotate, thereby driving the driving block to move; the driving block is fixedly connected to the sample tray.

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