A fully automatic sample addition system for high-throughput laser particle size analyzer
By designing a fully automatic sample loading system of high-throughput laser particle size meter in a particle size meter, and using rotary encoder and test tube lifting components to achieve automatic sample identification and sample loading, the waste of resources and inefficiency caused by manual intervention in the prior art is solved. The problem of this has improved the testing efficiency and the degree of automation of the system.
Patent Information
- Application Number
- CN202010779278.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-08-05
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2040-08-05
AI Technical Summary
The existing particle size instruments still require manual intervention during the automatic sample loading process, resulting in waste of resources and inefficiency.
A high-throughput laser particle size meter fully automatic sampling system is designed, including a base, a turntable, a sampling arm, a sampling needle unit and a code scanner. The automatic identification and sampling of samples are achieved through rotary encoder and test tube lifting components. Reduce human resources usage.
It realizes high-precision automatic identification and sample addition of samples, improves testing efficiency, meets users' aesthetic requirements, and saves human resources.
Smart Images
Figure CN111856056B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a measuring instrument, in particular to a full-automatic sample adding system for a high-throughput laser particle size analyzer. Background Art
[0002] The particle size analyzer is an instrument that tests the size and distribution of solid particles by physical methods. It is used to detect the particle size of powders and slurries and provide accurate control signals. It is widely used in cement, ceramics, medicines, emulsions, coatings, dyes, pigments, fillers, chemical products, catalysts, drilling mud, abrasives, lubricants, coal powder, mud, sand, dust, cells, bacteria, food, additives, pesticides, explosives, graphite, photosensitive materials, fuels, ink, metal and non-metal powders, calcium carbonate, kaolin, water-coal slurry and other powdered materials.
[0003] At present, there is still a blank in the field of automatic sampler in the domestic particle size analyzer industry. When conducting particle size tests, professional testers are still required to follow the instrument. Even if there is an automatic test function, manual sample addition is still required. This not only takes up human resources, but also causes a lot of unnecessary waste of time resources, thereby reducing work efficiency. Summary of the invention
[0004] In view of the shortcomings of the laser particle size analyzer in the prior art that still uses manual sample addition, resulting in low work efficiency, occupation of human resources, and prone to errors, the problem to be solved by the present invention is to provide a high-throughput laser particle size analyzer fully automatic sample addition system that can reduce the occupation rate of human resources and improve test efficiency.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0006] The present invention provides a high-throughput laser particle size analyzer fully automatic sampling system, comprising a base, a turntable, a sampling arm, a sampling needle unit and a code scanner, wherein the sampling arm is rotatably mounted on the base through a sampling arm support, and the turntable is rotatably mounted on the base on the side of the sampling arm support; the code scanner is arranged on the inner wall of the sampling arm support, facing the sampling needle of the sampling needle unit, and the sampling needle is mounted below the front end of the sampling arm.
[0007] The base has two steps, the turntable is installed on the first step, and the bottom of the turntable is connected to the turntable rotation drive device; the sampling arm is horizontally installed on the upper end of the sampling arm support, the sampling arm support is installed on the second step, and the bottom is connected to the sampling arm lifting drive device, and the sampling arm lifting drive device is installed on the sampling arm rotation drive device.
[0008] The turntable is provided with an outer circle sample disk, a middle circle sample disk and an inner circle sample disk, each circle sample disk has N holes for placing test tubes, and each hole has a unique position coordinate and serial number; the holes of the three circles of sample disks correspond to form N groups, three in each group, and the centers of the holes in each group are distributed on the same arc. When rotating to the sampling position, the center of the circle is the center of the sampling arm support, and the radius is the distance between the center of the sampling needle and the center of the sampling arm support.
[0009] N is an integer from 10 to 25.
[0010] There is also a test tube lifting unit under the turntable and in the base, including a lifting base, three telescopic rod assemblies and a stepper motor. The lifting base is in the shape of a door, and the three telescopic rod assemblies are vertically installed on the inner side of the door shape. The upper ends extend from the top of the door shape and are installed with their own support rings, and the bottom ends are respectively connected to the output ends of their own stepper motors; the three telescopic rod assemblies are respectively arranged at the three sampling stations of the sampling needle.
[0011] The telescopic rod assembly includes a sliding screw, a sliding sleeve and a supporting ring, wherein the bottom end of the sliding screw is installed on the pin coupling at the output end of the stepper motor through a connecting plate, the supporting ring is installed on the top end of the sliding screw, and the sliding sleeve is installed on the connecting plate by screws, so that the sliding screw is enclosed in the sliding sleeve and slides freely along the sliding groove of the sliding sleeve.
[0012] The supporting ring has a concave surface which is wedged with the shape of the bottom end of the test tube, and the surface of the concave surface is a friction surface or a wave surface.
[0013] The sampling arm is provided with 5 working positions, namely the inner circle sampling position, the middle circle sampling position, the outer circle sampling position, the cleaning position and the sample adding position, and the 5 working positions are in a circle with the center being the center of the sampling arm support; the arc formed by the 5 working positions is the rotation trajectory of the sampling needle; the cleaning position is provided with an ultrasonic cleaning tank which is arranged on the base; the sample adding position is provided with a sample adding cylinder.
[0014] The sampling needle unit includes a sampling needle, a diaphragm pump, a plunger pump, a water storage container and a three-way valve, wherein the water inlet of the diaphragm pump is connected to the water storage container through a pipeline, the water outlet of the diaphragm pump is connected to the COM port of the three-way valve through a pipeline, the NO port of the three-way valve is connected to the outer wall of the sampling needle through a connecting pipe, the NC port of the three-way valve is connected to the inner wall of the sampling needle through a connecting pipe, and the plunger pump is connected to the inner wall of the sampling needle through a pipeline through a connecting pipe.
[0015] The upper part of the sampling needle is inserted into the sampling needle seat, and the sampling needle seat is provided with a buffer zone and an annular rectification zone, wherein the buffer zone is arranged around the root of the sampling needle and is connected with the outer wall connecting tube of the sampling needle; the annular rectification zone is arranged around the root of the sampling needle and below the buffer zone, and a sealing ring is arranged between the root of the sampling needle above the buffer zone and the inner wall of the sampling needle seat.
[0016] The present invention has the following beneficial effects and advantages:
[0017] 1. In the fully automatic sample loading system of the high-throughput laser particle size analyzer of the present invention, the high-precision rotary encoder enables the rotating disk to be accurately positioned; the test tube (spiral) lifting ensures that the sample identity information (two-dimensional code) pasted on the test tube in any direction can be automatically recognized by the coding recognition component, and the sample coding information includes the basic source information of the sample and the test parameter information required for the test, and can complete the automatic testing of different types of samples; the overall appearance of the instrument is small and neat, and the fully automatic sample loading process not only meets the aesthetic requirements of users, but also saves human resources, and more effectively improves the work efficiency of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the structure of the fully automatic sample addition system of the high-throughput laser particle size analyzer of the present invention;
[0019] Figure 2 for Figure 1 A top view of
[0020] Figure 3 It is the scanning or sampling state of the fully automatic sampling system of the high-throughput laser particle size analyzer of the present invention;
[0021] Figure 4 It is a schematic diagram of the test tube lifting assembly;
[0022] Figure 5 It is a cross-sectional view of the test tube lifting assembly;
[0023] Figure 6 This is a partial diagram of the test tube lifting assembly;
[0024] Figure 7 It is an exploded view of the telescopic rod assembly;
[0025] Fig. 8A Schematic diagram of friction type support ring and test tube (I);
[0026] Figure 8B It is a schematic diagram of the corrugated ring support ring and the test tube (II);
[0027] Fig. 9 is a schematic cross-sectional view of the sampling needle unit structure in the present invention;
[0028] Fig.10 This is a schematic diagram of the structure of the sampling needle seat in the present invention;
[0029] Fig.11 This is a schematic diagram of the sampling state of the fully automatic sample adding system of the high-throughput laser particle size analyzer of the present invention;
[0030] Fig.12 This is a schematic diagram of the cleaning state of the fully automatic sample addition system of the high-throughput laser particle size analyzer of the present invention.
[0031] 1 is the base, 2 is the turntable, 3 is the test tube, 305 is the one-dimensional code / two-dimensional code, 4 is the ultrasonic cleaning tank, 5 is the sampling arm support, 6 is the barcode scanner, 7 is the sampling arm, 8 is the sampling needle unit, 801 is the diaphragm pump, 802 is the plunger pump, 803 is the three-way valve, 804 is the sampling needle seat, 805 is the water storage container, 806 is the sampling needle, 807 is the sealing ring, 808 is the buffer zone, 809 is the annular rectification zone, 9 is the circulation pump, 10 is the outer ring sample tray, 11 is the middle ring sample tray, 12 is the inner ring sample tray Sample tray, 13 is the inner circle sampling position, 14 is the middle circle sampling position, 15 is the outer circle sampling position, 16 is the cleaning position, 17 is the sample adding position, 18 is the sample adding cylinder, 19 is the test tube lifting unit, 1909 is the lifting base, 1910 is the stepping motor, 1911 is the motor seat, 1912 is the pin coupling, 1913 is the telescopic rod assembly, 1914 is the nut, 1915 is the proximity switch, 1916 is the support ring, 1917 is the sliding sleeve, 1918 is the sliding screw, 1919 is the connecting plate, and 1920 is the screw. DETAILED DESCRIPTION
[0032] The present invention will be further described below in conjunction with the accompanying drawings.
[0033] like Figure 1 As shown, the present invention provides a fully automatic sampling system for a high-throughput laser particle size analyzer, comprising a base 1, a turntable 2, a sampling arm 7 and a barcode scanner 6, wherein the sampling arm 7 is rotatably mounted on the base 1 through a sampling arm support 5, and the turntable 2 is rotatably mounted on the base 1 and on the side of the sampling arm support 5; the barcode scanner 6 is arranged on the inner wall of the sampling arm support 5 (towards the sampling needle 806), and the sampling needle 806 is installed below the front end of the sampling arm 7.
[0034] like Figure 1 and 2 As shown, the base 1 has two steps, the turntable 2 is installed on the first step, and the bottom of the turntable 2 is connected to the turntable rotation drive device; the sampling arm 7 is horizontally installed on the upper end of the sampling arm support 5, the sampling arm support 5 is installed on the second step, and the bottom is connected to the sampling arm lifting drive device, and the sampling arm lifting drive device is installed on the sampling arm rotation drive device. The sampling arm rotation drive device is installed on the base 1.
[0035] The turntable 2 is provided with an outer sample disk 10, a middle sample disk 11 and an inner sample disk 12. Each sample disk has N holes for placing the test tubes 3, and each hole has a unique position coordinate and serial number. The holes of the three sample disks form N groups, each with three holes. The centers of the holes in each group are distributed on the same arc. When rotating to the sampling position, the center of the circle is the center of the sampling arm support, and the radius is the distance between the center of the sampling needle and the center of the sampling arm support. Figure 2 N is an integer ranging from 10 to 25.
[0036] The sampling arm is provided with 5 working positions, namely the inner circle sampling position 13, the middle circle sampling position 14, the outer circle sampling position 15, the cleaning position 16 and the sample adding position 17, and the 5 working positions are in a circle with the center being the center of the sampling arm support; the arc formed by the 5 working positions is the rotation trajectory of the sampling needle 8.
[0037] The cleaning position 16 is an ultrasonic cleaning tank 4 arranged on the base 1 ; a sample adding cylinder 18 is arranged at the sample adding position 17 ; the sample adding cylinder 18 is a sample circulation component of the circulation pump 9 .
[0038] In this embodiment, N=20, that is, there are 20 holes on each circle of the sample disk, for a total of 60 holes. The sampling arm 7 is linked with the sampling arm support 5, can be lifted and rotated, and a stepper motor and a pulley are selected to drive the rotation, a stepper motor and a ball screw are selected to drive the lifting, and a photoelectric switch is selected for positioning. The turntable 2 is used to store the configured samples and the test tubes 3 with sample information storage coding labels (one-dimensional code or two-dimensional code) are affixed, and can store up to 60 samples. The holes on the turntable 2 are divided into 3 circles, each circle has 20 through holes, and each circle has a hole position, a total of 3 holes as a group, and the centers of the three holes in each group are in the same circle. The turntable 2 rotates with a stepper motor to drive the synchronous pulley to rotate, which can be forward and reverse. A high-precision absolute value rotary encoder is selected for positioning to ensure smooth rotation and accurate positioning. The barcode scanner 6 can be triggered by software commands and can parse one-dimensional and two-dimensional codes.
[0039] like Figures 3 to 5 As shown, there is also a test tube lifting unit 19 under the turntable 2 and in the base 1, including a lifting base 1909, three telescopic rod assemblies 1913 and a stepping motor 1910, wherein the lifting base 1909 is in the shape of a door, and the three telescopic rod assemblies 1913 are vertically installed on the inner side of the door shape, with the upper ends extending from the top of the door shape and installed with respective support rings 1916, and the bottom ends are respectively connected to the output ends of respective stepping motors 1910; the centers of the three telescopic rod assemblies 1913 are respectively set at the three sampling stations.
[0040] like Figures 6-7 As shown, the telescopic rod assembly 1913 includes a sliding screw 1918, a sleeve 1917 and a support ring 1916, wherein the bottom end of the sliding screw 1918 is installed on the pin coupling 1912 at the output end of the stepper motor 1910 through a connecting plate 1919, the support ring 1916 is installed on the top of the sliding screw 1918, and the sleeve 1917 is installed on the connecting plate 1919 through a screw 1920, so that the sliding screw 1918 is enclosed in the sleeve 1917 and slides freely along the slide groove of the sleeve 1917.
[0041] The support ring 19 has a concave surface that is wedged with the shape of the bottom end of the test tube, and the concave surface is a friction surface (such as Fig. 8A as shown) or a corrugated surface (as Figure 8B shown).
[0042] The sampling arm is provided with 5 working positions, namely the inner circle sampling position 13, the middle circle sampling position 14, the outer circle sampling position 15, the cleaning position 16 and the sample adding position 17, and the 5 working positions are in a circle with the center being the center of the sampling arm support; the arc formed by the 5 working positions is the movement trajectory of the sampling needle 8011.
[0043] like Fig. 9 As shown, the sampling needle unit includes a sampling needle 806, a diaphragm pump 801, a plunger pump 802, a water storage container 805 and a three-way valve 803, wherein the water inlet of the diaphragm pump 801 is connected to the water storage container 805 through a pipeline, the water outlet of the diaphragm pump 801 is connected to the COM port of the three-way valve 803 through a pipeline, the NO port of the three-way valve 803 is connected to the outer wall of the sampling needle 806 through a connecting pipe, the NC port of the three-way valve 803 is connected to the inner wall of the sampling needle 806 through a connecting pipe, and the plunger pump 802 is connected to the inner wall of the sampling needle 806 through a pipeline through a connecting pipe.
[0044] In this embodiment, the diaphragm pump 801, the three-way valve 803 and the sampling needle seat 804 are sealed and connected in the same pipeline through a connecting pipe. The diaphragm pump 801 is connected to the water storage container 805 through the pipeline; the plunger pump 802 is connected to the inner wall of the sampling needle 806 through the pipeline; and the sampling needle 806 is fixed on the sampling needle seat 804.
[0045] The sampling needle 806 is a long tapered needle, which is fixed on the robotic arm via the sampling needle seat 804; the sampling needle 806 has an inner wall and an outer wall, the inner wall is connected to the NC end of the three-way valve 803 and the plunger pump 802, and the outer wall is connected to the NO end of the three-way valve 803.
[0046] like Fig.10 As shown, the upper part of the sampling needle 806 is inserted into the sampling needle seat 804, and the sampling needle seat 804 has a buffer zone 808 and an annular rectifying zone 809 inside, wherein the buffer zone 808 is arranged around the root of the sampling needle 806 and is connected with the outer wall connecting tube of the sampling needle 806; the annular rectifying zone 809 is arranged around the root of the sampling needle 806 and below the buffer zone 808, and a sealing ring 807 is provided between the root of the sampling needle 806 above the buffer zone 808 and the inner wall of the sampling needle seat 804.
[0047] In this embodiment, the cross-sectional area of the buffer zone 808 is much larger than the diameter of the pipeline; the annular rectifying zone 809 is arranged around the periphery of the root of the sampling needle 806 and below the buffer zone 808, and a uniform annular, narrow channel is formed between the annular rectifying zone 809 and the sampling needle 806. A sealing ring 807 is provided between the periphery of the root of the sampling needle 806 and the inner wall of the sampling needle seat 804 above the buffer zone 808 and the inner wall of the sampling needle 806 connecting the pipe opening below.
[0048] The barcode scanner 6 is used to identify the two-dimensional code / barcode 305 attached to each test tube 3 and read the sample information. Its characteristics are mainly reflected in the software technology. First, a sample information library needs to be manually established, and a serial number is generated by extracting each / each sample information combination in the information library, and then a two-dimensional code / barcode 305 is generated, that is, each serial number (one-dimensional code / two-dimensional code 305) corresponds to one / a type of sample. The barcode scanner 6 identifies the one-dimensional code / two-dimensional code 305, reads the serial number it represents, and then calls the basic information and test condition information of the sample in the established sample information library. If all conditions of the tested samples are the same, the same serial number can be selected for batch printing.
[0049] The working process of the present invention is as follows:
[0050] like Figure 2 As shown, this embodiment takes the inner circle sampling position 13 as the test tube with the No. 03 hole position as an example, and any hole position of the inner circle sampling position 13 is defined as the No. 03 position, and the empty positions corresponding to the middle circle sampling position 14 and the outer circle sampling position 15 in the same circle are defined as the No. 02 position and the No. 01 position, respectively, and are arranged clockwise in this order to the No. 60 position. After completing the editing of the sample information and test conditions of the sample to be tested, establishing the coding library, printing the one-dimensional code / two-dimensional code 305 and setting the corresponding SOP work, first place the test tube 3 with the one-dimensional code / two-dimensional code 305 (barcode) attached and containing the sample into the hole position of the inner circle sample tray 12.
[0051] Power-on reset: The sampling arm support 5 moves upward under the driving of the sampling arm lifting drive device, and stops after the upper limit photoelectric switch detects that it is in place; under the driving of the test tube lifting unit 19 drive device, the three sets of telescopic rod assemblies 1913 move downward, and stop after the corresponding proximity switch detects that it is in place;
[0052] The sampling arm support 5 is driven by the sampling arm rotation drive device to rotate horizontally, and the photoelectric switch associated with the inner ring sample disk 12 is triggered to stop. At this time, the sampling needle 8011 is directly above the hole position 03 (such as Fig.11 The sampling arm support 5 moves downward under the drive of the sampling arm lifting drive device, and stops after the lower limit photoelectric switch detects that it is in place;
[0053] The barcode scanner 6 is turned on for continuous scanning (the detailed process of the barcode scanner 6 identification code is shown below), and at the same time, the test tube 3 at the No. 03 hole position is spirally lifted up. During the lifting process, when the QR code rotates to face the barcode scanner, the QR code information is read by the system; after the system reads the QR code content, the test tube 3 is spirally lowered until the proximity switch 1915 detects that it is in place, and then the test tube 3 is spirally lifted up and stops after completing the set fixed number of steps; suction and discharge stirring is performed through the sampling needle 806, and the number of stirring times is obtained through the QR code information. After the stirring is completed, the sample is quantitatively sucked into the sampling needle; the sample arm support 5 moves upward, and stops after the upper limit photoelectric switch detects that it is in place, and at the same time, the telescopic rod assembly 1913 at the inner circle sampling position 13 descends to the proximity switch 1915 detects that it is in place and stops; the sampling arm support 5 rotates horizontally, and stops after the photoelectric switch associated with the sample addition position 17 is triggered. At this time, the sampling needle 8 is directly above the sample addition position (such as Figure 1 The sample in the sampling needle 806 is injected into the sample tube 18, and the diaphragm pump sucks water to flush and inject the remaining sample in the sampling needle 806 again, and disperses it in the circulation pump 9;
[0054] like Fig.12 As shown, when cleaning the sampling needle 806, the sampling arm support 5 rotates horizontally and stops after the photoelectric switch associated with the cleaning position 16 is triggered; the sampling arm support 5 moves downward and stops after the lower limit photoelectric switch detects that it is in place, and high-speed water flows are sprayed along the needle wall inside and outside the sampling needle respectively. When the ultrasonic cleaning tank 4 is full of liquid, the ultrasonic wave is turned on, and the plunger pump performs suction and discharge operations to clean the inner and outer walls of the sampling needle. After the ultrasonic wave ends, the cleaning waste liquid is discharged from the ultrasonic cleaning tank 4, and then the high-speed water flow is sprayed along the needle wall inside and outside the sampling needle to complete a complete work process.
[0055] The scanning process of the barcode scanner 6 is as follows (taking sampling position No. 03 as an example): after turning on the barcode scanner 6 for continuous scanning, the stepper motor 1910 of the inner circle sample tray 12 corresponding to the test tube lifting unit 19 starts to operate, driving the telescopic rod assembly 1913 to rotate, and the sliding screw 1918 in the telescopic rod assembly 1913 also rotates while moving upward. The support ring 1916 on the sliding screw 1918 drives the corresponding test tube to perform an upward spiral upward motion. When the one-dimensional code / two-dimensional code 305 attached to the test tube enters the scanning area of the barcode scanner 6, the barcode scanner 6 can scan and identify the one-dimensional code / two-dimensional code 305 information, and upload it to the information processing system for decoding.
[0056] The sampling process of the sampling needle unit: the sampling needle 806 is positioned at the sampling position, and the three-way valve 803 is in a naturally closed state. At this time, the inner wall of the sampling needle 806 is connected to the plunger pump 802 through a pipeline, and the plunger pump 802 performs a suction and drainage action, and the sampling needle 806 realizes the suction and drainage action of the sample. The suction and drainage are repeated several times to achieve a stirring effect. After the stirring is completed, the plunger pump 802 sucks water and the sampling needle 806 sucks the sample.
[0057] Sampling process: the sampling needle 806 is positioned at the sampling position, and the three-way valve 803 is in a naturally closed state. At this time, the inner wall of the sampling needle 806 is connected to the plunger pump 802 through a pipeline. The plunger pump 802 performs a drainage action, and the sampling needle 806 discharges the sample and adds it to the sampling cylinder 18 of the circulation pump 9.
[0058] Cleaning action: the sampling needle 806 is positioned at the cleaning position, and the three-way valve 803 is in a naturally closed state. At this time, the diaphragm pump 801 is activated, and water first enters the buffer zone 808 through the pipeline, and then passes through the annular rectification zone 809. The water forms a uniform, high-speed wrapped water flow on the outer surface of the sampling needle to wash the outer wall. The water is injected into the ultrasonic cleaning tank 4 through the outer wall of the sampling needle 806. When the water fills the ultrasonic cleaning tank 4, the diaphragm pump 801 stops injecting water. At this time, the ultrasonic wave is turned on, and the plunger pump 802 performs suction and drainage actions. The plunger pump 802 stops after completing the specified number of suction and drainage actions, and the ultrasonic cleaning tank 4 discharges the water. The diaphragm pump 801 is turned on to flush the inner and outer walls of the sampling needle 806 again to complete the cleaning process.
Claims
1. A high-throughput laser particle size analyzer fully automatic sample addition system, characterized in that: It includes a base, a turntable, a sampling arm, a sampling needle unit and a code scanner, wherein the sampling arm is rotatably mounted on the base through a sampling arm support, and the turntable is rotatably mounted on the base on the side of the sampling arm support; the code scanner is arranged on the inner wall of the sampling arm support, facing the sampling needle of the sampling needle unit, and the sampling needle is installed below the front end of the sampling arm; There is also a test tube lifting unit under the turntable and in the base, including a lifting base, three telescopic rod assemblies and a stepper motor, wherein the lifting base is in the shape of a door, and the three telescopic rod assemblies are vertically installed on the inner side of the door shape, with the upper ends extending from the top of the door shape and installed with respective support rings, and the bottom ends are respectively connected to the output ends of respective stepper motors; the three telescopic rod assemblies are respectively arranged at the three sampling stations of the sampling needle; The telescopic rod assembly includes a sliding screw, a sliding sleeve and a supporting ring, wherein the bottom end of the sliding screw is mounted on the pin coupling at the output end of the stepper motor through a connecting plate, the top end of the sliding screw is mounted with a supporting ring, and the sliding sleeve is mounted on the connecting plate through screws, and the sliding screw is enclosed in the sliding sleeve and slides freely along the sliding groove of the sliding sleeve; The sampling needle unit includes a sampling needle, a diaphragm pump, a plunger pump, a water storage container and a three-way valve, wherein the water inlet of the diaphragm pump is connected to the water storage container through a pipeline, the water outlet of the diaphragm pump is connected to the COM port of the three-way valve through a pipeline, the NO port of the three-way valve is connected to the outer wall of the sampling needle through a connecting pipe, the NC port of the three-way valve is connected to the inner wall of the sampling needle through a connecting pipe, and the plunger pump is connected to the inner wall of the sampling needle through a pipeline through a connecting pipe.
2. The high-throughput laser particle size analyzer fully automatic sample loading system according to claim 1, characterized in that: The base has two steps, the turntable is installed on the first step, and the bottom of the turntable is connected to the turntable rotation drive device; the sampling arm is horizontally installed on the upper end of the sampling arm support, the sampling arm support is installed on the second step, and the bottom is connected to the sampling arm lifting drive device, and the sampling arm lifting drive device is installed on the sampling arm rotation drive device.
3. The high-throughput laser particle size analyzer fully automatic sample loading system according to claim 1 or 2, characterized in that: The turntable is provided with an outer circle sample disk, a middle circle sample disk and an inner circle sample disk, each circle sample disk has N holes for placing test tubes, and each hole has a unique position coordinate and serial number; the holes of the three circles of sample disks correspond to form N groups, three in each group, and the centers of the holes in each group are distributed on the same arc. When rotating to the sampling position, the center of the circle is the center of the sampling arm support, and the radius is the distance between the center of the sampling needle and the center of the sampling arm support.
4. The high-throughput laser particle size analyzer fully automatic sample loading system according to claim 3, characterized in that: N is an integer ranging from 10 to 25.
5. The high-throughput laser particle size analyzer fully automatic sample loading system according to claim 1, characterized in that: The supporting ring has a concave surface which is wedged with the shape of the bottom end of the test tube, and the surface of the concave surface is a friction surface or a wave surface.
6. The high-throughput laser particle size analyzer fully automatic sample loading system according to claim 1 or 2, characterized in that: The sampling arm is provided with 5 stations, namely the inner circle sampling station, the middle circle sampling station, the outer circle sampling station, the cleaning station and the sample adding station, and the 5 stations are in a circle, the center of which is the center of the sampling arm support; the arc formed by the 5 stations is the rotation trajectory of the sampling needle; An ultrasonic cleaning tank is arranged at the cleaning position and is arranged on the base; and a sample adding cylinder is arranged at the sample adding position.
7. The high-throughput laser particle size analyzer fully automatic sample loading system according to claim 1, characterized in that: The upper part of the sampling needle is inserted into the sampling needle seat, and the sampling needle seat is provided with a buffer zone and an annular rectification zone, wherein the buffer zone is arranged around the root of the sampling needle and is connected with the outer wall connecting tube of the sampling needle; the annular rectification zone is arranged around the root of the sampling needle and below the buffer zone, and a sealing ring is arranged between the root of the sampling needle above the buffer zone and the inner wall of the sampling needle seat.