A high-throughput water quality analyzer

Abstract

This invention relates to the field of water quality analyzer technology and discloses a high-throughput water quality analyzer, including a frame. The lower layer of the frame is a feeding and sampling area, and the upper layer of the frame is a liquid addition and detection area. Within the liquid addition and detection area, a sample mixing device, a test tube capping device, a sample digestion device, a cap removal device, a colorimetric extraction device, and a spectrophotometric detection device are sequentially arranged along the conveying direction. A buffer zone is provided between the test tube capping device and the sample digestion device. A first equidistant conveying mechanism is provided on the buffer zone. A second equidistant conveying mechanism and a third equidistant conveying mechanism are respectively provided in front of the sample mixing device and the colorimetric extraction device. Each of the first, second, and third equidistant conveying mechanisms includes a drive motor and a screw conveyor connected to the output end of the drive motor. The axis of the screw conveyor is parallel to the conveying direction, and the surface of the screw conveyor is spirally arranged along the axis with several grooves adapted to the width of the test tubes.

Description

Technical Field

[0001] This invention relates to the field of water quality analysis technology, and in particular to a high-throughput water quality analyzer. Background Technology

[0002] With socio-economic development, scientific progress, and the improvement of people's living standards, the requirements for water quality, whether for domestic or industrial use, are constantly increasing, and different water quality standards are also constantly developing and improving accordingly. When testing and analyzing different water qualities, different reagents are usually added, and the samples are analyzed after the reagents and samples have been thoroughly mixed and reacted.

[0003] Traditional water quality analysis typically involves manual operation. The entire process includes multiple steps such as water sampling, adding digestion reagents, mixing the sample, digesting the sample, adding colorimetric reagents, spectrophotometric determination, and data analysis. Each of these steps basically requires manual operation, especially when opening and closing the test tubes during the addition of various reagents and spectrophotometric determination stages. These operations are cumbersome and inefficient. Furthermore, due to differences in operator skills and other operational issues, water quality measurements may not meet standard digestion methods, resulting in inaccurate water quality measurements.

[0004] In response to the significant demand for improved quality and efficiency in the water quality testing industry, and the fact that water quality indicators (i.e., ammonia nitrogen, total phosphorus, total nitrogen, hexavalent chromium, nitrate, and nitrite nitrogen) are frequently tested in actual business operations and lack corresponding automated testing equipment on the market, researchers in this field have developed a high-throughput automated water quality analyzer for scenarios involving the analysis of large volumes of water samples. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a high-throughput water quality analyzer that ensures that the equipment can automatically sample and analyze water quality when faced with a large number of samples and a high frequency of samples, thereby reducing labor costs and improving detection efficiency.

[0006] The technical solution of this invention is as follows: A high-throughput water quality analyzer includes a frame, the lower layer of which is a feeding and sampling area, and the upper layer of which is a liquid addition and detection area. The feeding and sampling area is equipped with a sample library, a feeding and sampling device, and a sample bottle gripping robot positioned between the feeding and sampling device and the sample library. The liquid addition and detection area is equipped with, sequentially along the conveying direction, a sample mixing device, a test tube capping device, a sample digestion device, a cap removal device, a colorimetric extraction device, and a spectrophotometric detection device. A connection is provided between the discharge end of the sample digestion device and the cap removal device. The device is equipped with a buffer belt, on which a first equidistant conveying mechanism is provided. A second equidistant conveying mechanism and a third equidistant conveying mechanism are respectively provided on the front side of the sample mixing device and the colorimetric extraction device. The first, second, and third equidistant conveying mechanisms each include a drive motor and a screw conveyor connected to the output end of the drive motor. The axis of the screw conveyor is parallel to the conveying direction, and the surface of the screw conveyor is spirally provided with several grooves along the axis. The width of the grooves is adapted to the width of the test tube.

[0007] As described above, in the feeding and sampling area, a sample bottle gripping robot picks up sample bottles from the sample library and places them into the feeding and sampling device, thereby sampling the solution inside the sample bottles. In the liquid addition and detection area, the sample mixing device, test tube capping device, sample digestion device, capping device, colorimetric extraction device, and spectrophotometric detection device sequentially perform sample mixing, test tube capping, sample digestion, test tube capping, colorimetric extraction, and spectrophotometric detection operations. The buffer belt is used to buffer the discharge from the sample digestion device, and the first equidistant conveying mechanism is used to adjust the digested test tubes after the sample digestion device discharges. The discharge rhythm ensures that the discharge rhythm of the digested test tubes is consistent with the discharge rhythm of the test tube capping, and also serves to balance the time, allowing for cooling time after digestion. The second equidistant conveying mechanism is used to adjust the spacing between test tubes through the spirally arranged grooves on the screw conveyor. The grooves are in contact with and adapted to the outer surface of the test tubes. When the screw conveyor rotates one revolution, the grooves simultaneously drive the test tubes forward one grid, thereby adjusting the spacing and rhythm of the test tube conveying, thus achieving equidistant conveying of the test tubes. This invention enables automatic sampling, liquid addition, and testing when dealing with large batches and high-frequency samples, reducing labor costs and improving testing efficiency.

[0008] The feeding and sampling device includes a turntable, which is sequentially equipped with a feeding and capping station, a sampling station, a capping station, and a discharging station along the rotation direction. A placement block is provided in the center of the turntable. A sampling component is correspondingly provided at each sampling station. The sampling component includes a sampling lifting module, a sampling translation module connected to the output end of the sampling lifting module, and a sampling pipette connected to the output end of the sampling translation module. The sampling pipette is connected to a sampling pump. A sampling cleaning cylinder is provided at the rear of each sampling station. The feeding and capping station and the capping station are respectively equipped with a capping component and a capping component. Both the capping component and the capping component include a translation module, a first lifting module, a second lifting module, a bottle clamping cylinder connected to the output end of the first lifting module, and a rotating finger cylinder connected to the output end of the second lifting module. The first lifting module and the second lifting module are arranged side by side on the output end of the translation module via a mounting frame. As can be seen, the turntable is driven to rotate by a corresponding motor. The feeding and capping station, sampling station, capping station, and discharging station respectively perform the feeding, capping, sampling, capping, and discharging processes. The sampling component is used by the sampling lifting module to drive the sampling pipette down into the sample bottle to aspirate the sample solution. The placement block is used to place the unscrewed bottle cap. The capping component is used to move above the feeding and capping station to unscrew the bottle cap on the sample bottle. The capping component is used to move above the capping station to tighten the bottle cap onto the sample bottle. The first lifting module is used to drive the bottle body clamping component to clamp the sample bottle body. The second lifting component is used to drive the rotating finger cylinder to rotate, thereby unscrewing or tightening the bottle cap on the sample bottle.

[0009] The sample storage unit includes a rack, several feeding conveyor belts mounted on the rack, and several limiting cylinders mounted on the feeding conveyor belts. Each limiting cylinder has a receiving cavity adapted to the sample bottle. An outlet belt and a return belt are respectively provided between the sample storage unit and the sample bottle gripping robot. A barcode scanner is mounted on a vertical frame at the inlet end of the outlet belt. Therefore, the rack carries a large number of sample bottles via the feeding conveyor belts. The sampling robot grips the corresponding sample bottle, scans it using the barcode scanner, and places the correctly matched sample bottle at the appropriate position in the sampling mechanism. The barcode scanner is used for accurate scanning.

[0010] The sample addition and mixing device includes a sample addition mechanism and a first liquid addition and mixing mechanism arranged in parallel. The sample addition mechanism includes a sample addition lifting module, a sample addition translation module disposed on the output end of the sample addition lifting module, and a sample addition tube. The sample addition tube is connected to the sampling pipette, and a sample addition cleaning tube is disposed on the side of the sample addition lifting module. Therefore, the sample addition mechanism is used to add the sample solution extracted by the feeding sampling device into the test tube; the first liquid addition and mixing mechanism is used to add and mix the first reagent; the sample addition lifting module is used to move the sample addition tube up and down to achieve sample addition in the test tube; and the sample addition translation module is used to move the sample addition tube to above the sample addition cleaning tube, so that it can be lowered into the sample addition cleaning tube by the sample addition lifting module to clean the sample addition tube.

[0011] The colorimetric liquid extraction device includes a second liquid addition and mixing mechanism and a liquid extraction mechanism arranged in parallel. The second liquid addition and mixing mechanism and the liquid extraction mechanism are located at both ends on the same side of the third equidistant conveying mechanism. The first liquid addition and mixing mechanism, the second liquid addition and mixing mechanism, and the liquid extraction mechanism each include a mixing and lifting module, a mixing and translating module disposed on the output end of the mixing and lifting module, a stirring motor disposed on the output end of the mixing and translating module, a stirring paddle connected to the output end of the stirring motor, and a liquid delivery pipe. The liquid delivery pipe is arranged parallel to the stirring paddle, and a mixing and cleaning pipe is disposed on the side of the mixing and lifting module. Therefore, the second liquid addition and mixing mechanism and the liquid extraction mechanism integrate liquid extraction and mixing. The second liquid addition and mixing mechanism and the liquid extraction mechanism are located at both ends on the same side of the third equidistant conveying mechanism to reserve time for colorimetric reaction. The second liquid addition and mixing mechanism is used to add and mix the second reagent at the same time through the infusion tube and the stirring paddle. The liquid extraction mechanism is used to extract the liquid after mixing for colorimetric comparison. The liquid extraction mechanism extracts the liquid in the test tube through the infusion tube. The stirring motor is used to drive the stirring paddle to stir and mix in the test tube. The mixing translation module is used to drive the stirring paddle to move to the corresponding position above the mixing and cleaning tube, and then descend into the mixing and cleaning tube through the mixing lifting module for cleaning.

[0012] The test tube capping device includes a vibrating feeding plate and a capping mechanism disposed on the output end of the vibrating feeding plate. Both the capping mechanism and the cap removal device include a cap removal lifting module, a cap removal traversing module connected to the output end of the cap removal lifting module, a cap removal gripper cylinder connected to the output end of the cap removal traversing module, and a test tube clamping cylinder. The test tube clamping cylinder is disposed below the cap removal gripper cylinder. Therefore, the capping mechanism is used for automatic capping, the cap removal device is used to unscrew the test tube cap, the vibrating feeding plate is used for vibrating feeding of the test tube cap, the cap removal gripper cylinder is used to clamp the cap and then rotate it to unscrew or tighten it, the test tube clamping cylinder is used to hold the test tube, and the cap removal traversing module is used to pick up the cap from the vibrating feeding plate and move it above the corresponding test tube.

[0013] A cap collection box is connected to the side of the cap-retrieving device via a cap-retrieving slide. Therefore, the cap collection box is used for bottle cap recycling.

[0014] The sample digestion device includes a digestion stand, several digestion reaction vessels connected to the digestion stand, and a three-axis material handling robot. Several limiting grooves adapted to the test tubes are provided inside the digestion reaction vessels. Therefore, the three-axis material handling robot is used to grip the test tubes and then load and unload them into the digestion reaction vessels.

[0015] A feed buffer area is provided in front of the sample mixing device, and a feed buffer area is provided in front of the colorimetric extraction device. Both the feed buffer area and the discharge buffer area include several conveyor belts. The sample mixing device and the colorimetric extraction device are arranged back-to-back between the feed buffer areas. Therefore, the feed buffer area is used to buffer a large number of test tubes to be added for testing, and the discharge buffer area is used to buffer a large number of test tubes to be discharged. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a partial top view of the present invention;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the feed sampling area;

[0020] Figure 5 This is a schematic diagram of the feeding and sampling device;

[0021] Figure 6 This is a schematic diagram of the sample mixing device;

[0022] Figure 7 This is a schematic diagram of the colorimetric extraction device;

[0023] Figure 8 This is a structural diagram of a conveyor belt module;

[0024] Figure 9 This is a schematic diagram of the capping mechanism. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] like Figures 1 to 9 As shown, this invention is a high-throughput water quality analyzer, including a frame 1. The lower layer of the frame 1 is a feeding and sampling area, and the upper layer of the frame 1 is a liquid addition and detection area. The feeding and sampling area is equipped with a sample library 11, a feeding and sampling device 2, and a sample bottle gripping robot 3 positioned between the feeding and sampling device 2 and the sample library 11. The liquid addition and detection area is equipped with, sequentially along the conveying direction, a sample mixing device 5, a test tube capping device 6, a sample digestion device 7, a cap removal device 15, a colorimetric extraction device 8, and a spectrophotometer 10. A buffer band 41 is provided between the discharge end of the sample digestion device 7 and the cap removal device 15. The buffer band 41 is provided with a first equidistant conveying mechanism 20. The front sides of the sample mixing device 5 and the colorimetric extraction device 8 are respectively provided with a second equidistant conveying mechanism 9 and a third equidistant conveying mechanism 80. The first equidistant conveying mechanism 20, the second equidistant conveying mechanism 9 and the third equidistant conveying mechanism 80 all include a drive motor 91 and a screw conveying component 92 connected to the output end of the drive motor 91. The axis of the screw conveying component 92 is parallel to the conveying direction. The surface of the screw conveying component 92 is provided with a plurality of grooves 921 spirally along the axis. The width of the grooves 921 is adapted to the width of the test tube.

[0027] In this embodiment, the frame 1 has a double-layer frame structure. The lower layer of the frame 1 is the feeding and sampling area, and the upper layer of the frame 1 is the liquid addition and detection area. By adjusting the rotation speed of the drive motor 91, the rotation speed of the screw conveyor can be adjusted, thereby realizing the adjustment of the test tube conveying spacing and rhythm. The colorimetric liquid extraction device 8 is connected to the spectrophotometric detection device 10.

[0028] The feeding and sampling device 2 includes a turntable 21, which has a feeding and capping station, a sampling station, a capping station, and a discharging station arranged sequentially along the rotation direction. A placement block 211 is provided in the middle of the turntable 21. A sampling component 22 is provided at each sampling station. The sampling component 22 includes a sampling lifting module 221, a sampling translation module 222 connected to the output end of the sampling lifting module 221, and a sampling pipette 223 connected to the output end of the sampling translation module 222. The sampling pipette 223 is connected to a sampling pump. A sampling cleaning cylinder 2 is provided at the rear of the sampling station. 24. The feeding and capping station and the cap fastening station are respectively provided with capping assembly 24 and cap fastening assembly 25. Both the capping assembly 24 and the cap fastening assembly 25 include a transverse module 240, a first lifting module 241, a second lifting module 242, a bottle clamping cylinder 243 connected to the output end of the first lifting module 241, and a rotating finger cylinder 244 connected to the output end of the second lifting module 242. The first lifting module 241 and the second lifting module 242 are arranged side by side on the output end of the transverse module 240 through a mounting bracket. In this embodiment, a rotary motor 210 is provided at the bottom of the turntable 21, and the turntable 21 is connected to the output end of the rotary motor 210. The inner side of the clamping block of the rotary finger cylinder 244 is provided with an arc surface adapted to the bottle cap, and an anti-slip groove is provided in the arc surface. Two sets of transverse modules are arranged in parallel on the transverse frame 23, which are used to drive the cap screwing assembly 24 and the cap fastening assembly 25 to move laterally respectively. After sampling, the sampling and cleaning cylinder 224 is used to achieve one sampling and one cleaning.

[0029] The sample storage 11 includes a rack 111, several feeding conveyor belts 112 mounted on the rack 111, and several limiting cylinders 113 mounted on the feeding conveyor belts 112. Each limiting cylinder 113 has a receiving cavity adapted to the sample bottle. An outlet belt 12 and a return belt 13 are respectively provided between the sample storage 11 and the sample bottle gripping robot 3. A barcode scanner 14 is mounted on the inlet end of the outlet belt 12 via a vertical frame. In this embodiment, the sample bottle gripping robot 3 includes a transverse frame 32, a gripping lifting module 33 mounted on the transverse frame 32, and a rotating gripper 34 mounted on the output end of the gripping lifting module 33. Parallel slide rails 31 are arranged on both outer sides of the rack 111. The transverse frame 32 slides on the slide rails 31. The rotating gripper 34 is a rotary finger cylinder integrating a gripper and rotation function, using a single gripper to grip and flip the sample bottle.

[0030] The sample addition and mixing device 5 includes a sample addition mechanism 51 and a first liquid addition and mixing mechanism 52 arranged in parallel. The sample addition mechanism 51 includes a sample addition lifting module 511, a sample addition translation module 512 disposed on the output end of the sample addition lifting module 511, and a sample addition tube 513. The sample addition tube 513 is connected to the sampling pipette 223, and a sample addition cleaning tube 514 is disposed on the side of the sample addition lifting module 511. In this embodiment, the sample addition tube 513 is connected to the sampling pipette 223 through a flexible tube. After the sample is added, the sample addition translation module 512 moves the sample addition tube 513 to the corresponding position above the sample addition cleaning tube 514, and the sample addition lifting module 511 drives the sample addition tube 513 to extend into the sample addition cleaning tube 514 for aspiration and cleaning.

[0031] The colorimetric liquid extraction device 8 includes a second liquid addition and mixing mechanism 81 and a liquid extraction mechanism 82 arranged in parallel. The second liquid addition and mixing mechanism 81 and the liquid extraction mechanism 82 are located at both ends on the same side of the third equidistant conveying mechanism 80. The first liquid addition and mixing mechanism 52, the second liquid addition and mixing mechanism 81 and the liquid extraction mechanism 82 each include a mixing and lifting module 55, a mixing and translation module 56 arranged on the output end of the mixing and lifting module 55, a stirring motor 57 arranged on the output end of the mixing and translation module 56, a stirring paddle 58 connected to the output end of the stirring motor 57 and a liquid delivery pipe 59. The liquid delivery pipe 59 is arranged parallel to the stirring paddle 58 and is connected to a liquid delivery pump. A mixing and cleaning pipe 551 is arranged on the side of the mixing and lifting module 55. In this embodiment, when the third equidistant conveying mechanism 80 drives the screw conveyor 92 to rotate, the screw conveyor 92 rotates (moving one grid every 150 seconds). The conveying time between the test tube cups conveyed at the head end and the test tube cups conveyed at the tail end of the screw conveyor 92 is fifteen minutes. This allows the second liquid addition and mixing mechanism 81 to add and mix the liquid, and then allow it to stand for fifteen minutes to develop color before the liquid is drawn by the liquid extraction mechanism 82. During the liquid extraction, four infusion pipes 59 are arranged around the outside of the stirring paddle 58.

[0032] The test tube capping device 6 includes a vibrating feeding plate 61 and a capping mechanism 63 disposed on the output end of the vibrating feeding plate 61. Both the capping mechanism 63 and the cap removal device 15 include a cap removal lifting module 631, a cap removal lateral movement module 632 connected to the output end of the cap removal lifting module 631, a cap removal gripper cylinder 633 connected to the output end of the cap removal lateral movement module 632, and a test tube clamping cylinder 62. The test tube clamping cylinder 62 is disposed below the cap removal gripper cylinder 633. In this embodiment, the cap removal gripper cylinder 633 is a rotary finger cylinder integrating a gripper and rotation function, and its output end is connected to a clamping block 634 adapted to the shape of the test tube cap.

[0033] The cap retrieval device 15 is connected to a cap recycling box 17 on its side via a cap retrieval slide 16. In this embodiment, the cap retrieval slide 16 is inclined.

[0034] The sample digestion device 7 includes a digestion stand 71, several digestion reaction vessels 72 connected to the digestion stand 71, and a three-axis material handling robot 73. Each digestion reaction vessel 72 has several limiting grooves adapted to the test tubes. In this embodiment, a mounting frame 74 is provided above the digestion stand 71. Each digestion reaction vessel 72 has several limiting grooves adapted to the test tubes. The three-axis material handling robot includes a three-axis moving module and a gripper cylinder connected to the output end of the three-axis moving module. Three digestion reaction vessels 72 are provided on the digestion stand 71. Each digestion reaction vessel 72 contains 20 test tubes, and a single batch can digest 60 test tubes.

[0035] The sample mixing device 5 has an infeed buffer zone 42 at its front side, and the colorimetric extraction device 8 has an outlet buffer zone 43 at its front side. The infeed buffer zone 42 and the outlet buffer zone 43 include several conveyor belts. The sample mixing device 5 and the colorimetric extraction device 8 are positioned back-to-back between the infeed buffer zone 42 and the outlet buffer zone 43. In this embodiment, the buffer belt 41, the infeed buffer zone 42, and the outlet buffer zone 43 form a conveyor belt module 4. The conveying directions of two adjacent conveyor belts within the buffer belt 41, the infeed buffer zone 42, and the outlet buffer zone 43 are opposite. Arc-shaped guide plates are provided at the tail end of the preceding conveyor belt and the head end of the following conveyor belt along the conveying direction, thereby achieving unidirectional S-shaped conveying, saving space, and enabling large-volume conveying and buffering.

[0036] The workflow of this invention is as follows: A sample bottle gripping robot 3 grips a sample bottle on the sample storage 11. After gripping the bottle neck, the robot 3 moves to the barcode scanner 14 and rotates one full turn. The barcode scanner 14 scans the barcode on the sample bottle to confirm if it is a correct sample. If it is a correct sample, it is transported to the discharge belt 12. The discharge belt 12 moves the sample bottle to the capping station. The capping assembly 24 grips the bottle using the bottle-holding cylinder 243, and the finger cylinder 244 is rotated to open the cap. The robotic arm 3 places the cap onto the placement block 211. The turntable 21 is driven to rotate 90 degrees by the rotary motor 210, rotating the sample bottle to the sampling station. The sampling component 22 then extracts the liquid and takes a sample. The turntable 21 continues to rotate 90 degrees to the capping station. The capping component 25 clamps the cap and rotates in the opposite direction to perform the capping operation on the sample bottle. The sample bottle continues to rotate to the discharge station, where the return belt 13, combined with the sample bottle gripping robotic arm 3, puts the sampled bottle back to its original position. Thus, the sampling in the feeding and sampling area of ​​the lower layer of the frame 1 is completed.

[0037] The sample mixing device 5 dispenses the extracted sample liquid into a test tube cup conveyed from the feed buffer zone 42. The second equidistant conveying mechanism 9 drives the screw conveyor 92 to rotate via the drive motor 91. The screw conveyor 92 rotates once every sixty seconds, and the test tube cup moves forward one space with each rotation. After the first liquid mixing mechanism 52 adds and mixes the liquid, the test tube cup is conveyed out. The vibrating feeding tray 61 outputs the cup lid, the test tube clamping cylinder 62 holds the test tube, and the cap removal claw cylinder 633 closes the cap and outputs it. The three-axis material handling robot 73 places the test tube bottle into the reaction vessel for digestion. After digestion, the three-axis material handling robot 73 transfers the test tube to the buffer belt 41, which is used for time balancing. Each test tube cup is conveyed for 60 seconds and discharged for 90 seconds. The first equidistant conveying mechanism 20 adjusts the discharge rhythm and provides cooling time to allow the tubes to cool to room temperature. The test tubes continue to be conveyed, and the cap removal device 15 unscrews the caps. The removed caps slide through the cap removal slide 16 into the cap collection box 17 for collection. The opened test tube cups are conveyed to the front of the color development and extraction device 8. The third equidistant conveying mechanism 80 conveys the tubes through the screw conveyor 92. After the second liquid addition and mixing mechanism 81 adds and mixes the liquid, the tubes are allowed to stand for 15 minutes for color development. Then, the extraction mechanism 82 extracts the liquid for spectrophotometric detection. After the detection is completed, the bottles are batch-output along the conveyor belt of the discharge buffer area 43.

[0038] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-throughput water quality analyzer, comprising a frame (1), characterized in that: The lower layer of the frame (1) is the feeding and sampling area, and the upper layer of the frame (1) is the liquid addition and detection area. The feeding and sampling area is equipped with a sample library (11), a feeding and sampling device (2), and a sample bottle gripping robot (3) located between the feeding and sampling device (2) and the sample library (11). The liquid addition and detection area is equipped with a sample mixing device (5), a test tube capping device (6), a sample digestion device (7), a capping device (15), a colorimetric liquid extraction device (8), and a spectrophotometer (10) arranged sequentially along the conveying direction. A buffer band (41) is provided between the discharge end of the sample digestion device (7) and the capping device (15). The buffer band (41) is equipped with... A first equidistant conveying mechanism (20) is provided. The front sides of the sample mixing device (5) and the colorimetric extraction device (8) are respectively provided with a second equidistant conveying mechanism (9) and a third equidistant conveying mechanism (80). The first equidistant conveying mechanism (20), the second equidistant conveying mechanism (9) and the third equidistant conveying mechanism (80) all include a drive motor (91) and a screw conveyor (92) connected to the output end of the drive motor (91). The axis of the screw conveyor (92) is parallel to the conveying direction. The surface of the screw conveyor (92) is spirally provided with a number of grooves (921) along the axis. The width of the grooves (921) is adapted to the width of the test tube. The feeding and sampling device (2) includes a turntable (21). The turntable (21) is provided with a feeding and capping station, a sampling station, a capping station and a discharging station in sequence along the rotation direction. A placement block (211) is provided in the middle of the turntable (21). A sampling component (22) is provided at the sampling station. The sampling component (22) includes a sampling lifting module (221), a sampling translation module (222) connected to the output end of the sampling lifting module (221), and a sampling pipette (223) connected to the output end of the sampling translation module (222). The sampling pipette (223) is connected to the sampling pump. A sampling cleaning cylinder (224) is provided at the rear of the sampling station. The feeding and capping station and the cap fastening station are respectively provided with capping assembly (24) and cap fastening assembly (25). The capping assembly (24) and the cap fastening assembly (25) each include a transverse module (240), a first lifting module (241), a second lifting module (242), a bottle clamping cylinder (243) connected to the output end of the first lifting module (241), and a rotating finger cylinder (244) connected to the output end of the second lifting module (242). The first lifting module (241) and the second lifting module (242) are arranged side by side on the output end of the transverse module (240) through the mounting frame. The sample addition and mixing device (5) includes a sample addition mechanism (51) and a first liquid addition and mixing mechanism (52) arranged in parallel. The sample addition mechanism (51) includes a sample addition lifting module (511), a sample addition translation module (512) arranged on the output end of the sample addition lifting module (511), and a sample addition tube (513). The sample addition tube (513) is connected to the sampling pipette (223). A sample addition cleaning tube (514) is arranged on the side of the sample addition lifting module (511). The colorimetric liquid extraction device (8) includes a second liquid addition and mixing mechanism (81) and a liquid extraction mechanism (82) arranged in parallel. The second liquid addition and mixing mechanism (81) and the liquid extraction mechanism (82) are located at both ends on the same side of the third equidistant conveying mechanism (80). The first liquid addition and mixing mechanism (52), the second liquid addition and mixing mechanism (81) and the liquid extraction mechanism (82) each include a mixing and lifting module (55), a mixing and translation module (56) arranged on the output end of the mixing and lifting module (55), a stirring motor (57) arranged on the output end of the mixing and translation module (56), a stirring paddle (58) connected to the output end of the stirring motor (57) and a liquid delivery pipe (59). The liquid delivery pipe (59) is arranged parallel to the stirring paddle (58). A mixing and cleaning pipe (551) is arranged on the side of the mixing and lifting module (55).

2. The high-throughput water quality analyzer according to claim 1, characterized in that: The sample storage (11) includes a material rack (111), several feeding conveyor belts (112) set on the material rack (111), and several limiting cylinders (113) set on the feeding conveyor belts (112). The limiting cylinders (113) are provided with a receiving cavity adapted to the sample bottles. The sample storage (11) and the sample bottle gripping robot (3) are respectively provided with a discharge belt (12) and a return belt (13). The inlet end of the discharge belt (12) is provided with a barcode scanner (14) through a stand.

3. The high-throughput water quality analyzer according to claim 1, characterized in that: The test tube capping device (6) includes a vibrating feeding plate (61) and a capping mechanism (63) disposed on the output end of the vibrating feeding plate (61). The capping mechanism (63) and the cap removal device (15) both include a cap removal lifting module (631), a cap removal horizontal movement module (632) connected to the output end of the cap removal lifting module (631), a cap removal gripper cylinder (633) connected to the output end of the cap removal horizontal movement module (632), and a test tube clamping cylinder (62). The test tube clamping cylinder (62) is disposed below the cap removal gripper cylinder (633).

4. A high-throughput water quality analyzer according to claim 1, characterized in that: The cap retrieval device (15) is connected to a cap recycling box (17) on the side via a cap retrieval slide (16).

5. A high-throughput water quality analyzer according to claim 1, characterized in that: The sample digestion device (7) includes a digestion seat (71), several digestion reaction vessels (72) connected to the digestion seat (71), and a three-axis material handling robot (73). Several limiting grooves adapted to test tubes are provided inside the digestion reaction vessels (72).

6. A high-throughput water quality analyzer according to claim 1, characterized in that: The sample mixing device (5) is provided with a feed buffer zone (42) on its front side, and the colorimetric extraction device (8) is provided with a discharge buffer zone (43) on its front side. Both the feed buffer zone (42) and the discharge buffer zone (43) include several conveyor belts. The sample mixing device (5) and the colorimetric extraction device (8) are arranged back to back between the feed buffer zone (42) and the discharge buffer zone (43).

Images