Automatic equipment for detection pretreatment of banned azo dye and working process of automatic equipment

Abstract

The invention relates to the technical field of banned azo dye detection facilities, and provides banned azo dye detection pretreatment automation equipment and a working process thereof. Comprising a workbench, a feeding mechanism, a clamping and positioning mechanism, a screwing and clamping mechanism, a gantry shifting mechanism, a tray grabbing mechanism, a liquid feeding mechanism, a solid feeding mechanism, a cooling mechanism, a heating mechanism, a tray moving assembly, a shaking mechanism and an electric control system. According to the full-automatic multi-station screwing machine, multiple procedures of feeding, clamping and positioning, screwing, charging, heating, cooling, shaking up and the like are integrated, automatic linkage control is achieved through an electric control system, operation of all links does not need to be manually intervened, and manual operation errors are avoided; the feeding mechanism is small in frictional resistance and stable in conveying through the design of a transmission belt and a guide groove, and quick starting and stopping and accurate positioning of a carrying disc are achieved in cooperation with a plurality of photoelectric sensors; all the mechanisms are arranged in a partitioned mode according to the operation process, boundaries are clear, the operation path is shortened, and meanwhile observation and maintenance of operators are facilitated.

Description

Technical Field

[0001] This invention relates to the technical field of facilities for detecting prohibited azo dyes, and in particular to an automated pretreatment device for detecting prohibited azo dyes and its workflow. Background Technology

[0002] Azo dyes, due to their characteristic azo groups (-N=N-), possess excellent coloring properties, stability, and chemical activity, and are widely used in the dye industry (such as textile dyeing), plastics processing (such as polymer colorants), and agricultural chemicals (such as certain herbicides and fungicides), making them key basic chemicals in modern industrial systems. However, extensive research and practice have shown that some azo dyes (especially aromatic azo compounds) are prone to decomposition under specific conditions (such as high temperature, acidic environments, or biological metabolic processes) to produce aromatic amines. More than 20 aromatic amines are explicitly listed as restricted hazardous substances. These substances may not only cause acute health problems such as skin allergies and respiratory irritation, but long-term exposure can also significantly increase the risk of malignant tumors such as bladder cancer and liver cancer. Furthermore, their residues may cause persistent pollution to the ecological environment through water and soil infiltration.

[0003] The experimental procedure for pretreatment before detecting banned azo dyes involves taking a certain mass of textiles, adding a certain volume of buffer solution, and incubating in a 70°C water bath for 30 minutes. Then, the reactor is opened, a certain volume of reducing solution is added, and after shaking, the mixture is reduced in a 70°C water bath for 30 minutes. After removal, it is cooled to room temperature for 2 minutes. Then, a certain mass of extraction reagent (powder and liquid) is added, and the textiles are then filtered. The supernatant is then used for testing. However, currently available azo pretreatment equipment generally only performs certain functions, and many operations still require manual assistance. It cannot achieve full automation of the entire pretreatment process for detecting banned azo dyes, thus significantly reducing work efficiency.

[0004] Therefore, there is an urgent need to design an automated equipment for the pretreatment process of prohibited azo dyes that can automatically complete the entire process, thereby improving work efficiency. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides an automated pretreatment device for detecting banned azo dyes, comprising a workbench, a feeding mechanism, a clamping and positioning mechanism, a twisting and clamping mechanism, a gantry shifting mechanism, a tray grabbing mechanism, a liquid feeding mechanism, a solid feeding mechanism, a cooling mechanism, a heating mechanism, a tray moving assembly, a shaking mechanism, and an electrical control system. Wherein: feeding mechanism, which is fixedly installed on the workbench, is used to transport the tray along a preset path to the target position corresponding to each process; A clamping and positioning mechanism is provided on the workbench to stably clamp the test tube and move the test tube to the corresponding functional mechanism for operation. A screw-on clamping mechanism is mounted on a gantry shifting mechanism. It is used to clamp and transfer test tubes on a carrier tray into a clamping and positioning mechanism, and simultaneously unscrew the caps of the test tubes; or to tighten the caps of the test tubes on the clamping and positioning mechanism and transfer the processed test tubes back onto the carrier tray. A tray gripping mechanism is mounted on the gantry shifting mechanism and is arranged on different sides of the gantry shifting mechanism, respectively, along with a screwing and clamping mechanism; it is used to grip the tray and move it between the feeding mechanism, cooling mechanism, and heating mechanism. A liquid feeding mechanism is provided, which is mounted on the gantry shifting mechanism and is located on the same side of the gantry shifting mechanism as the screwing and clamping mechanism; it is used to add the required liquid reagent to the test tube placed on the clamping and positioning mechanism. A solid feeding mechanism is provided, which is mounted on the gantry shifting mechanism and is located on the same side of the gantry shifting mechanism as the screwing and clamping mechanism; it is used to add the required solid reagents to the test tubes placed on the clamping and positioning mechanism. A cooling mechanism, which is set on the workbench, is used to perform low-temperature cooling on test tubes placed on a carrier tray; A heating mechanism is provided on the workbench for constant-temperature heating of test tubes placed on a carrier plate. A tray moving assembly is disposed on a worktable and is used to receive and move the tray into the shaking mechanism; A shaking mechanism, which is set on a workbench, is used to thoroughly shake the mixture in the test tube placed in the carrier tray; The electrical control system integrates a PLC controller, a touch screen, and an emergency stop button, and is mounted on a column on one side of the workbench. The feeding mechanism, clamping and positioning mechanism, twisting and clamping mechanism, gantry shifting mechanism, pallet grabbing mechanism, liquid feeding mechanism, solid feeding mechanism, cooling mechanism, heating mechanism, pallet moving assembly, and shaking mechanism are all electrically connected to the electrical control system via wiring, and are uniformly controlled by the electrical control system.

[0006] Furthermore, the feeding mechanism is provided in two sets, and the two sets of feeding mechanisms are arranged in a straight line front and back. The feeding mechanism includes a first linear guide rail, a transmission belt, a drive wheel, a driven wheel, and a first drive motor. The first linear guide rail has an L-shaped cross-section. The first drive motor is located at one end of the first linear guide rail. The drive shaft of the first drive motor is connected to the drive wheel. The other end of the first linear guide rail is provided with a driven wheel. The transmission belt is tensioned between the drive wheel and the driven wheel. The transmission belt is configured to convey material between the upper and lower sides of the L-shaped transverse side of the first linear guide rail. The first linear guide rail is equipped with a first photoelectric sensor and a second photoelectric sensor. The first photoelectric sensor is configured to send a signal to the controller when it senses the carrier disk, and the controller adjusts the opening of the first drive motor. The second photoelectric sensor is configured to send a signal to the controller when it senses the carrier disk, and the controller adjusts the closing of the first drive motor.

[0007] Furthermore, the clamping and positioning mechanism includes a first conveying assembly, a clamping assembly, and a rotating assembly. The clamping assembly includes a second motor mounting base, at least one second drive motor, and at least one fixed gripper. The second drive motor is mounted on the second motor mounting base, and its drive shaft is coaxially fixed with the drive shaft of the fixed gripper. The second drive motor is used to drive the fixed gripper to open and close. One of the grippers in the fixed gripper is provided with an L-shaped placement plate for placing the test tube held by the fixed gripper. A third photoelectric sensor is provided at each second drive motor, and the third photoelectric sensor is configured to sense whether the carrier plate is in position. The first conveying assembly includes a base, a third drive motor, a third motor mounting base, a first slide rail, a first slider, and a first lead screw placed inside the first slide rail. The first slide rail is fixed on the base. The third drive motor is fixed to one end of the first slide rail via the third motor mounting base. The two ends of the first lead screw are supported by the first bearing seats at the corresponding mounting positions at both ends of the first slide rail. The third drive motor is connected to the first lead screw via a first coupling. The first lead screw and the first slider are threadedly engaged by the first lead screw nut. The first slider is slidably connected to the first slide rail. The second motor mounting base is disposed on the first slider. The first lead screw nut drives the first slider and the second motor mounting base disposed on the first slider to move linearly along the first slide rail. The rotating assembly includes a rotary motor, the drive shaft of which is connected to the first slider, and the rotary motor is configured to drive the clamping assembly to rotate via the first slider.

[0008] Furthermore, the screwing and clamping mechanism includes at least one second conveying component and at least one screwing and clamping component. The second conveying component includes a mounting base, a fourth drive motor, a fourth motor mounting seat, a second slide rail, a second slider, and a second lead screw placed inside the second slide rail. The second slide rail is fixed on the mounting base. The fourth drive motor is fixed to one end of the second slide rail via the fourth motor mounting seat. The two ends of the second lead screw are supported by second bearing seats at corresponding mounting positions at both ends of the second slide rail. The fourth drive motor is connected to the second lead screw via a second coupling. The second lead screw and the second slider are threadedly engaged by a second lead screw nut. The second slider is slidably connected to the second slide rail. The screwing and clamping component is disposed on the second slider. The second lead screw nut drives the second slider and the screwing and clamping component disposed on the second slider to move linearly along the second slide rail. The screw-on clamping assembly includes a first cylinder and a second jaw. The piston rod of the first cylinder and the second jaw are fixedly connected. The inner wall of the second jaw is provided with internal threads. The piston rod of the first cylinder is configured to drive the second jaw to perform a clamping action. The second jaw can rotate around its own axis to cooperate with the inner wall threads to complete the screw-on action.

[0009] Furthermore, the gantry shifting mechanism includes a column, a crossbeam assembly, and two longitudinal beam assemblies. The two ends of the longitudinal beam assembly are fixedly connected to the column, and the crossbeam assembly is slidably connected to the longitudinal beam assembly. The crossbeam assembly includes a crossbeam, a fifth motor mounting base, and a fifth drive motor. One side of the crossbeam is provided with a third slide rail and a third slider, which are slidably connected. The fifth drive motor is fixed to one end of the crossbeam via the fifth motor mounting base. The third slider is also fixedly connected to a pallet-grabbing mechanism. The other side of the crossbeam is provided with a fourth slide rail and a fourth slider, which are slidably connected. The fourth slider is also fixedly connected to a mounting base of a screw-clamping mechanism and a liquid feeding mechanism. A third lead screw is provided inside the crossbeam. The two ends of the third lead screw are supported at corresponding mounting positions at both ends of the crossbeam via third bearing seats. The third lead screw is threadedly engaged with the third slider and the fourth slider via a third lead screw nut. The fifth drive motor is connected to the third lead screw via a third coupling. The third lead screw nut drives the third slider and the pallet-grabbing mechanism to move linearly along the third slide rail, while simultaneously the fourth slider, the screw-clamping mechanism, and the liquid feeding mechanism move linearly along the fourth slide rail. The longitudinal beam assembly includes a first longitudinal beam, a sixth drive motor, a sixth motor mounting base, a fifth slide rail, a fifth slider, and a fourth lead screw placed within the fifth slide rail. The fifth slide rail is mounted on the first longitudinal beam. The sixth drive motor is fixed to one end of the fifth slide rail via the sixth motor mounting base. The two ends of the fourth lead screw are supported by fourth bearing seats at corresponding mounting positions on both ends of the fifth slide rail. The sixth drive motor is connected to the fourth lead screw via a fourth coupling. The fourth lead screw and the fifth slider are threadedly engaged by a fourth lead screw nut. The fifth slider is slidably connected to the fifth slide rail. One end of the crossbeam is fixedly connected to the fifth slider. The fourth lead screw nut drives the fifth slider and the crossbeam assembly to move linearly along the fifth slide rail.

[0010] Furthermore, the pallet gripping mechanism includes a second cylinder, guide blocks, guide posts, a mounting plate, a connecting plate, and a gripper assembly. The gripper assembly is mounted on the mounting plate, and guide posts are provided at both ends of the mounting plate. The connecting plate is connected to the two guide blocks, and guide holes are provided in the guide blocks. The guide posts are placed in the guide holes. The piston rod of the second cylinder is connected to the mounting plate. Under the action of the second cylinder, the piston rod drives the gripper assembly to move along the direction of the guide posts. The connecting plate is also fixedly connected to a third slider. The gripper assembly includes a double-rod cylinder and two third grippers. The two piston rods of the double-rod cylinder are fixedly connected to the two third grippers respectively, and the ends of the third grippers have flat gripping contact surfaces.

[0011] Furthermore, the cooling mechanism includes a first water tank, and a first temperature control element is provided in the first water tank; The heating mechanism includes a second water tank, in which a heating element and a second temperature control element are disposed. A cover assembly is provided on the second water tank, the cover assembly including a third cylinder, a bellows cover, a mounting frame, a sixth slide rail, and a sixth slider. The mounting frame is located at the edge of the opening of the second water tank, the sixth slide rail is located on one side of the mounting frame, one end of the bellows cover is fixedly connected to the sixth slider, and the other end of the bellows cover is connected to the mounting frame; the sixth slider is slidably connected to the sixth slide rail, and the sixth slider is also connected to the piston rod of the third cylinder. Under the action of the third cylinder, the sixth slider drives one end of the bellows cover to move along the direction of the sixth slide rail. One end of the accordion cover is also provided with an L-shaped baffle to limit the height of the accordion cover after compression.

[0012] Furthermore, the pallet moving assembly includes a pallet horizontal drive assembly, a pallet longitudinal drive assembly, and a fourth gripper. The horizontal drive assembly for the carrier plate includes a second longitudinal beam, a seventh drive motor, a seventh slide rail, a seventh slider, and a fifth lead screw placed inside the seventh slide rail. The seventh slide rail is mounted on the second longitudinal beam. The seventh drive motor is fixed to one end of the seventh slide rail via a seventh motor mounting seat. The two ends of the fifth lead screw are supported by fifth bearing seats at corresponding mounting positions at both ends of the seventh slide rail. The seventh drive motor is connected to the fifth lead screw via a fifth coupling. The fifth lead screw and the seventh slider are threadedly engaged by a fifth lead screw nut. The seventh slider is slidably connected to the seventh slide rail. The longitudinal drive assembly is fixedly connected to the seventh slider. The fifth lead screw nut drives the seventh slider to move linearly along the seventh slide rail. The longitudinal drive assembly of the carrier includes a cylinder mounting base, a fourth cylinder and a gripper mounting base. The cylinder mounting base is fixedly connected to the seventh slider, the fourth cylinder is fixedly connected to the cylinder mounting base, the drive shaft of the fourth cylinder is fixedly connected to the gripper mounting base, and the fourth gripper is fixed on the gripper mounting base. The fourth gripper includes a gripper connecting plate and two support frames, which are arranged in parallel on the gripper connecting plate.

[0013] Furthermore, the shaking mechanism includes a side-opening placement rack, a flipping assembly, an oscillation assembly, and a damping assembly. The flipping assembly is configured to rotate the placement rack by 90 degrees, and the oscillation assembly is configured to reciprocate the flipped placement rack. The placement rack is equipped with a clamping assembly configured to clamp the test tubes placed inside the placement rack; the clamping assembly includes a fifth cylinder and a pressure plate, the pressure plate is disposed inside the placement rack, the placement rack has a through hole, and the piston rod of the fifth cylinder passes through the through hole and is connected to the pressure plate; the bottom of the placement rack is provided with a drainage hole; The flipping assembly includes a rotary cylinder and a connector. The piston rod of the rotary cylinder is connected to one end of the connector, and the side of the connector is welded to the placement frame. The oscillation assembly includes a base plate, an eighth drive motor, an eccentric wheel, a connecting rod, a second linear guide rail, an eighth slider, and a sliding plate. The eccentric wheel and the second linear guide rail are mounted on the base plate. The output shaft of the eighth drive motor is interference-fitted with the center hole of the eccentric wheel. The eccentric wheel is connected to the connecting rod, the connecting rod is connected to the sliding plate, the eighth slider and the sliding plate are fixedly connected, and the second linear guide rail is embedded in the eighth slider and slidably connected to the second linear guide rail. The sliding plate reciprocates along the direction set by the second linear guide rail under the drive of the eighth drive motor and the eccentric wheel. The damping assembly includes a reference plate, a first damper, and a second damper. The reference plate is located below the base plate, the first damper is located between the reference plate and the base plate, one end of the second damper is fixedly connected to the base plate through a connecting frame, and the other end of the second damper is fixedly connected to the worktable.

[0014] Furthermore, the solid feeding mechanism includes a mounting bracket, a storage bin, a bin cover, a discharge port, a metering screw, a feeding chamber, a discharge nozzle, a feeding drive motor, a gearbox, and a sixth coupling. The storage bin is fixed above the mounting bracket, and the bin cover is sealed to the top of the storage bin with a threaded seal. The discharge port at the bottom of the storage bin is sealed to the feeding chamber. The metering screw is rotatably mounted in the feeding chamber, with one end extending below the discharge port. The feeding drive motor is bolted to the corresponding mounting position on the mounting bracket, and its output shaft is connected to the input end of the gearbox via the sixth coupling. The output end of the gearbox is drively connected to the exposed end of the metering screw. The discharge nozzle is fixed at the bottom discharge port of the feeding chamber. A cleaning component is also provided at the discharge nozzle. The cleaning component includes a fifth cylinder and a receiving plate. The piston rod of the fifth cylinder is connected to the receiving plate, and the fifth cylinder is electrically connected to the electronic control system. The extension and retraction of the fifth cylinder is controlled by the control system.

[0015] Furthermore, the worktable is equipped with reagent bottles, a liquid dispensing box, and a pipette tip rack in the area near the liquid dispensing mechanism. The liquid dispensing box and reagent bottles are pre-filled with the target reagents required for the pretreatment of banned azo dyes. The pipette tip rack is used to place the pipette tips required by the liquid dispensing mechanism. The pipette tip rack has a multi-layer structure and has multiple placement areas. The number of placement positions in each placement area is the same as the number of placement positions on the carrier tray.

[0016] Furthermore, the liquid feeding mechanism includes a liquid dispenser, a liquid dispensing needle, and a needle holder, wherein the liquid dispensing needle is mounted on the needle holder; the needle holder is fixed on the gantry shifting mechanism, and the reagent bottle, the liquid dispenser, and the liquid dispensing needle are connected by a delivery pipeline.

[0017] Another aspect of the present invention provides a workflow for an automated pretreatment device for disabling azo dye detection, the workflow comprising: Sample fabric preparation and test tube placement: Cut the sample fabric and put the resulting scraps into test tubes; place the test tubes containing the scraps into the first placement hole of the carrier tray one by one; place the carrier tray containing the test tubes at the inlet of the feeding mechanism. Carrier tray transfer and positioning: Start the feeding mechanism, which drives the carrier tray to be conveyed along the first linear guide rail. When the carrier tray moves to the position corresponding to the clamping and positioning mechanism, it is triggered by the first photoelectric sensor, and the feeding mechanism stops running. At the same time, the blocking component rises. Test tube loading and unloading: The screwing clamping mechanism moves to the top of the tray under the drive of the gantry shifting mechanism. Its second jaw clamps the test tube and moves the test tube to the fixed jaw of the clamping and positioning mechanism for positioning. Then, the second jaw of the screwing clamping mechanism unscrews the test tube cap by rotating and engaging the inner wall thread. First liquid addition: The liquid addition mechanism moves above the test tube under the drive of the gantry shifting mechanism, draws the citrate-sodium hydroxide solution from the reagent bottle, and precisely adds 8ml into the test tube; after the addition is completed, the screw clamping mechanism moves again to screw the test tube cap back onto the test tube; repeat the above actions of taking and placing the test tube, opening the cap, adding the solution, and screwing the cap on until the liquid addition operation of all test tubes in the entire tray is completed; First heating and heat preservation: The tray gripping mechanism, driven by the gantry shifting mechanism, grips the entire tray and moves it to the second water tank of the heating mechanism; the heating and heat preservation program is started to keep the sample in the test tube warm for 30 minutes; after the heat preservation is completed, the tray gripping mechanism takes out the tray and moves it to the first linear guide rail corresponding to the clamping and positioning mechanism. Second liquid addition: The screw-on clamping mechanism moves above the carrier tray, clamps the test tube, and moves it to the clamping and positioning mechanism for positioning. The test tube cap is then unscrewed. The liquid addition mechanism moves above the test tube and adds 2 ml of sodium dithionite solution into the test tube. After addition, the screw-on clamping mechanism screws the test tube cap back on and simultaneously tilts the test tube using the rotating component. The test tube is shaken by the reciprocating motion of the first conveying component to initially mix the solution. The test tube is then placed back into the corresponding placement hole on the carrier tray. The above actions are repeated to complete the addition and shaking operation for all test tubes in the entire carrier tray. Second heating and heat preservation: The tray grabbing mechanism grabs the entire tray again and transfers it to the second water tank of the heating mechanism for continued heat preservation for 30 minutes. Cooling treatment: After the heat preservation is completed, the tray-grabbing mechanism removes the tray from the second water tank and transfers it to the first water tank of the cooling mechanism; the test tube is then cooled for 2 minutes. Third feeding: After cooling, the tray-grabbing mechanism moves the tray to the first linear guide rail corresponding to the clamping and positioning mechanism; the clamping mechanism clamps the test tube and moves it to the clamping and positioning mechanism for positioning, and the test tube cap is unscrewed; first, 7g of sodium chloride granules are added to the test tube through the solid feeding mechanism, and then 0.5ml of sodium hydroxide solution and 3ml of internal standard solution are added sequentially through the liquid feeding mechanism; after feeding, the clamping mechanism is screwed back on, and the test tube is placed back into the corresponding placement hole of the tray; the above actions are repeated to complete the feeding operation of all test tubes in the entire tray; Shaking and mixing: The feeding mechanism is started, and the tray is moved to the corresponding position of the shaking mechanism; the tray moving component moves, and the tray is moved to the placement rack of the shaking mechanism, and the pressing component presses the test tube; the shaking mechanism is started, so that the test tube reciprocates in the horizontal direction for 15 minutes to ensure that the material in the test tube is fully mixed and uniform. Carrier removal: After oscillation is completed, the carrier moving component moves to move the carrier from the shaking mechanism back to the feeding mechanism. The feeding mechanism is then started to transport the test tubes and carriers that have completed the pretreatment of the banned azo dyes to the next target position.

[0018] The present invention has the following beneficial effects: (1) This invention integrates multiple processes such as feeding, clamping and positioning, twisting, adding, heating, cooling and shaking, and realizes automated linkage control through an electronic control system, eliminating the need for manual intervention in each step of the operation and avoiding human error. (2) The feeding mechanism in this invention has low frictional resistance and smooth conveying through the design of transmission belt and guide groove, and with the help of multiple photoelectric sensors, it can realize rapid start and stop and precise positioning of the tray; (3) The gantry shifting mechanism in this invention adopts a bidirectional drive design, and multiple execution components can work synchronously without interference, which greatly shortens the process switching time; (4) The shaking mechanism in this invention achieves an oscillation frequency of 300 times / minute through the cooperation of the flipping component, the oscillation component and the damping component; (5) The various mechanisms in this invention are arranged in zones according to the work process, with clear boundaries, which shortens the work path and facilitates observation and maintenance by operators. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure inside the casing of the present invention.

[0021] Figure 3 This is a schematic diagram of the cooling mechanism inside the casing in this invention.

[0022] Figure 4This is a schematic diagram of the suction head placement rack in this invention.

[0023] Figure 5 This is a schematic diagram of the carrier disk in this invention.

[0024] Figure 6 This is a schematic diagram of the feeding mechanism in this invention.

[0025] Figure 7 This is a schematic diagram of the clamping and positioning mechanism (excluding the rotating component) in this invention.

[0026] Figure 8 This is a schematic diagram of the screwing and clamping mechanism in this invention.

[0027] Figure 9 This is a schematic diagram showing the positions of the screwing clamping mechanism, the liquid feeding mechanism, and the solid feeding mechanism in this invention.

[0028] Figure 10 This is a schematic diagram of the disk-grabbing mechanism in this invention.

[0029] Figure 11 This is a schematic diagram of the heating mechanism in this invention.

[0030] Figure 12 This is a schematic diagram of the carrier disk moving component in this invention.

[0031] Figure 13 This is a schematic diagram of the longitudinal drive assembly of the carrier disk in this invention.

[0032] Figure 14 This is a schematic diagram showing the position of the shaking mechanism in this invention.

[0033] Figure 15 This is a schematic diagram showing the position of the clamping component in this invention.

[0034] Figure 16 This is a schematic diagram of the solid feeding mechanism in this invention.

[0035] Figure 17 This is a schematic diagram showing the location of the cleaning component in this invention. Detailed Implementation

[0036] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. However, these embodiments are not intended to limit the present invention. Any similar structures and similar variations of the present invention should be included in the protection scope of the present invention. The commas in the present invention all indicate the relationship between and. The English letters in the present invention are case-sensitive.

[0037] Example 1 like Figure 1-3As shown, this embodiment provides an automated pretreatment device for detecting prohibited azo dyes, including a workbench 1, a feeding mechanism 2, a clamping and positioning mechanism 3, a twisting clamping mechanism 4, a gantry shifting mechanism 5, a tray gripping mechanism 6, a liquid feeding mechanism 7, a solid feeding mechanism 8, a cooling mechanism 9, a heating mechanism 10, a tray moving assembly 11, a shaking mechanism 12, and an electrical control system; the workbench is surrounded by a machine cover 101, which covers all the mechanisms inside the machine cover.

[0038] Wherein: feeding mechanism 2, the feeding mechanism 2 is fixedly installed on the workbench 1, and is used to transport the tray along the preset path to the target position corresponding to each process; Clamping and positioning mechanism 3 is set on the workbench 1 to stably clamp the test tube and drive the test tube to move to each functional mechanism to perform corresponding operations. The screwing clamping mechanism 4 is assembled on the gantry shifting mechanism 5 and is used to clamp and transfer the test tubes on the carrier plate 100 into the clamping and positioning mechanism 3, and simultaneously unscrew the test tube caps of the test tubes; or tighten the test tube caps of the test tubes on the clamping and positioning mechanism 3 and transfer the processed test tubes back to the carrier plate 100. A tray gripping mechanism 6 is mounted on the gantry shifting mechanism 5 and is arranged on different sides of the gantry shifting mechanism 5, respectively, along with the screwing and clamping mechanism 4; it is used to grip the tray 100 and move it between the feeding mechanism 2, the cooling mechanism 9, and the heating mechanism 10. Liquid feeding mechanism 7 is mounted on gantry shifting mechanism 5 and is mounted on the same side of gantry shifting mechanism 5 as screwing and clamping mechanism 4; it is used to add the required liquid reagent to the test tube placed on clamping and positioning mechanism 3. Solid feeding mechanism 8 is mounted on gantry shifting mechanism 5 and is mounted on the same side of gantry shifting mechanism 5 as screwing clamping mechanism 4; it is used to add the required solid reagents to the test tube placed on clamping and positioning mechanism 3. Cooling mechanism 9, which is set on workbench 1, is used to perform low-temperature cooling treatment on test tubes placed on carrier tray 100; Heating mechanism 10, which is set on workbench 1, is used to perform constant temperature heating on test tubes placed on carrier plate 100; A tray moving assembly 11 is disposed on the worktable 1 and is used to receive and move the tray 100 into the shaking mechanism 12. A shaking mechanism 12 is provided on the workbench 1 and is used to thoroughly shake the mixture in the test tube placed in the carrier tray 100. The electrical control system integrates a PLC controller, a touch screen, and an emergency stop button, and is mounted on a column on one side of the workbench. The feeding mechanism 2, clamping and positioning mechanism 3, twisting and clamping mechanism 4, gantry shifting mechanism 5, pallet grabbing mechanism 6, liquid feeding mechanism 7, solid feeding mechanism 8, cooling mechanism 9, heating mechanism 10, pallet moving assembly 11, and shaking mechanism 12 are all electrically connected to the electrical control system via wiring and are uniformly controlled by the electrical control system.

[0039] The feeding mechanism 2 is located in the middle of the workbench 1. The cooling mechanism 9, heating mechanism 10, and shaking mechanism 12 are located on one side of the feeding mechanism, and the clamping and positioning mechanism 3 and the tray moving assembly 11 are located on the other side of the feeding mechanism 2. A reagent bottle 13, a liquid dispensing box 14, and a pipette tip holder 15 are located on the workbench 1 near the liquid dispensing mechanism 7. Both the liquid dispensing box 14 and the reagent bottle 13 are pre-filled with the target reagents required for the pretreatment of banned azo dyes. The liquid dispensing mechanism 7 includes a dispensing machine 71 or a peristaltic pump 72. The specific steps for dispensing the reagent in the reagent bottle 13 via the dispensing machine or peristaltic pump are as follows: the reagent bottle, dispensing machine, or peristaltic pump is connected to the dispensing needle via a delivery pipeline. The dispensing needle 16 is mounted on a needle holder 17. The needle holder 17 is fixed to the gantry shifting mechanism 5. The reagent bottle has a built-in liquid extraction tube, and the outlet of the peristaltic pump is connected to multiple branch pipelines via branch pipeline connectors. Connect the branch lines (the number of branch lines matches the number of pump channels). Each branch line corresponds to a dispensing needle. The reagent bottle is equipped with a level sensor (float type or photoelectric type), which is electrically connected to the electronic control system to monitor the remaining reagent level in real time. When the level falls below a preset threshold, the electronic control system issues an audible and visual warning and pauses the dispensing operation to prevent damage to the peristaltic pump from dry running. According to a preset program (or operator instructions), the electronic control system starts the peristaltic pump in the corresponding channel and simultaneously controls the clamping and positioning mechanism to move the test tube below the dispensing needle. The peristaltic pump uses rollers to squeeze the delivery line, creating negative pressure to draw the reagent from the reagent bottle into the line, then pushes it through positive pressure to the dispensing needle, and finally injects it into the test tube. Figure 4 As shown, the pipette tip holder 15 is used to hold the pipette tips 151 required by the liquid dispensing mechanism. The pipette tip holder 15 has a multi-layer structure and multiple placement areas 152. The number of placement positions 153 in each placement area 152 is the same as the number of placement positions on the carrier tray, and the inner wall of the placement position 153 is provided with elastic anti-slip pads to prevent the pipette tips from falling or shaking. The workbench 1 is also equipped with a reagent insulated box 18 and a magnetic stirrer 19. The reagent insulated box 18, pipette tip holder 15, liquid dispensing box 14, and magnetic stirrer 19 are placed sequentially along the edge of the workbench. The temperature control range of the reagent insulated box 18 is 4-25℃, and it is used to store volatile or temperature-sensitive reagents. The stirring rate of the magnetic stirrer 19 can be adjusted by an electronic control system.

[0040] like Figure 5 As shown, the carrier plate 100 includes a first placement plate 1001, a second placement plate 1002, and a third placement plate 1003. The first placement plate 1001, the second placement plate 1002, and the third placement plate 1003 are connected vertically at intervals by a connecting plate 1004. The first placement plate 1001 is provided with first placement holes 10011 evenly distributed, and the second placement plate 1002 is provided with second placement holes 10021 evenly distributed. The first placement holes and the second placement holes are arranged correspondingly. The first placement plate, the second placement plate, and the third placement plate are all provided with drainage holes 1000 to facilitate the drainage of water after being treated by the cooling mechanism 9 and the heating mechanism 10. A gasket is provided in the first placement hole. The gasket is made of rubber or silicone. Through its own elasticity and cushioning, it fixes the test tube while effectively preventing the test tube from colliding with the test tube carrier plate, thereby protecting the test tube and the sample that may be contained inside.

[0041] like Figure 6 As shown, the feeding mechanism 2 is used to transport the carrier tray 100. The feeding mechanism 2 includes a first linear guide rail 21, a transmission belt 22, a drive pulley 23, a driven pulley 24, and a first drive motor 25. The first linear guide rail 21 has an L-shaped cross-section. The first drive motor 25 is located at one end of the first linear guide rail 21, and the transmission shaft of the first drive motor 25 is connected to the drive pulley 23. The other end of the first linear guide rail 21 is provided with a driven pulley 24. The transmission belt 22 is tensioned between the drive pulley 23 and the driven pulley 24. The transmission belt 22 is configured to transport materials between the upper and lower sides of the L-shaped horizontal side of the first linear guide rail 21. The first linear guide rail 21 is bolted to the worktable 1, providing a stable guiding reference for the transport of the pallet. The upper surface of the L-shaped horizontal side of the first linear guide rail 21 is precision ground to ensure the flatness of the contact surface between the bottom of the pallet and the guide rail, reducing frictional resistance during transport. The upper and lower sides of the short L-shaped side of the first linear guide rail are respectively provided with belt guide grooves to limit the transmission trajectory of the transmission belt and prevent belt deviation or detachment. The vertical L-shaped side of the first linear guide rail is used to limit the transmission direction of the pallet.

[0042] The first linear guide 21 is provided with a first photoelectric sensor 211 and a second photoelectric sensor 212. The first photoelectric sensor 211 is configured to send a signal to the controller when it senses the carrier disk 100, and the controller adjusts the opening of the first drive motor. The second photoelectric sensor 212 is configured to send a signal to the controller when it senses the carrier disk, and the controller adjusts the closing of the first drive motor. When the first photoelectric sensor 211 detects the carrier tray, it immediately sends a positioning signal to the controller. Upon receiving the signal, the controller outputs an start command according to a preset program, controlling the first drive motor to start rotating and driving the transmission belt to move the carrier tray. When the second photoelectric sensor detects the carrier tray, it immediately sends a positioning signal to the controller. Upon receiving the signal, the controller outputs a stop command according to a preset program, controlling the first drive motor to stop rotating. To prevent the carrier tray from continuing to move forward due to inertia, a blocking component 26 is provided at this position. The blocking component 26 is positioned between the first linear guide rails and includes a blocking cylinder and a stop block. The drive shaft of the blocking cylinder is connected to the stop block, and the surface of the stop block is provided with a buffer pad to avoid hard collisions with the carrier tray and ensure timely braking. Upon receiving a downward movement signal from the controller, the controller outputs a downward movement command according to a preset program, controlling the drive shaft of the blocking cylinder to move downward and simultaneously controlling the start of the first drive motor to drive the conveyor belt for transport.

[0043] One of the first linear guide rails has a second photoelectric sensor 212 installed at the initial position of the clamping and positioning mechanism 3. When the second photoelectric sensor 212 senses the tray, it stops on the first linear guide rail 21, allowing the screwing clamping mechanism 4 to move the test tube placed on the tray 100 to the clamping and positioning mechanism. The other first linear guide rail has a second photoelectric sensor installed at the corresponding position of the shaking mechanism 12, so that the tray faces the side opening of the placement rack, making it convenient for the tray moving assembly to move the tray into the placement rack.

[0044] like Figure 7As shown, the clamping and positioning mechanism 3 includes a first conveying component 31, a clamping component 32, and a rotating component. The clamping component 32 includes a second motor mounting base 321, at least one second drive motor 322, and at least one fixed gripper 323. The second drive motor 322 is mounted on the second motor mounting base 321, and its drive shaft is coaxially fixed with the drive shaft of the fixed gripper 323. The second drive motor 322 is used to drive the fixed gripper 323 to open and close, and the opening and closing stroke can be steplessly adjusted by an electronic control system. One of the grippers in the fixed gripper 323 is provided with an L-shaped placement plate 3231, which is used to place the test tube clamped by the fixed gripper. Each second drive motor 322 is provided with a third photoelectric sensor 324, which is configured to sense whether the carrier tray is in place. If the carrier tray is sensed, the rotating clamping mechanism 4 is triggered to move and clamp the test tube in the carrier tray into the clamping component 32.

[0045] The first conveying assembly 31 includes a base 311, a third drive motor 312, a third motor mounting base 313, a first slide rail 314, a first slider 315, and a first lead screw placed inside the first slide rail 314. The first slide rail 314 is fixed on the base 311. The third drive motor 312 is fixed to one end of the first slide rail 314 through the third motor mounting base 313. The two ends of the first lead screw are supported by the first bearing seats at the corresponding mounting positions at both ends of the first slide rail 314. The third drive motor 312 is connected to the first lead screw through a first coupling. The first lead screw and the first slider are threadedly engaged by the first lead screw nut. The first slider is slidably connected to the first slide rail. The second motor mounting base is disposed on the first slider. The first slider and the second motor mounting base disposed on the first slider are driven to move linearly along the first slide rail by the first lead screw nut. The rotating assembly includes a rotary motor, the drive shaft of which is connected to the first slider, and the rotary motor is configured to drive the clamping assembly to rotate via the first slider.

[0046] like Figure 8 As shown, the screwing and clamping mechanism 4 includes at least one second conveying component 41 and at least one screwing and clamping component 42. The second conveying component 41 includes a mounting base 411, a fourth drive motor, a fourth motor mounting seat 413, a second slide rail 414, a second slider 415, and a second lead screw 416 placed inside the second slide rail. The second slide rail 414 is fixed on the mounting base 411. The fourth drive motor 412 is fixed to one end of the second slide rail 414 through the fourth motor mounting seat 413. The two ends of the second lead screw are supported by the second bearing seats at the corresponding mounting positions at both ends of the second slide rail 414. The fourth drive motor is connected to the second lead screw through the second coupling. The second lead screw and the second slider are threaded together by the second lead screw nut. The second slider 415 is slidably connected to the second slide rail 414. The screw clamping assembly 42 is disposed on the second slider 415. The second lead screw nut drives the second slider 415 and the screw clamping assembly 42 disposed on the second slider to move linearly along the second slide rail 414. The screwing clamping assembly 42 includes a first cylinder 421 and a second jaw 422. The piston rod of the first cylinder 421 and the second jaw 422 are fixedly connected. The inner wall of the second jaw 422 is provided with an internal thread. The piston rod of the first cylinder 421 is configured to drive the second jaw 422 to perform a clamping action. The second jaw 422 can rotate around its own axis to cooperate with the inner wall thread to complete the screwing action.

[0047] like Figure 3 As shown, the gantry shifting mechanism 5 includes a column 51, a crossbeam assembly 52, and two longitudinal beam assemblies 53. The two ends of the longitudinal beam assembly 53 are fixedly connected to the column 51, and the crossbeam assembly 52 is slidably connected to the longitudinal beam assembly 53. like Figure 9 As shown, the crossbeam assembly 52 includes a crossbeam and a fifth drive motor. One side of the crossbeam is provided with a third slide rail and a third slider, which are slidably connected. The fifth drive motor is fixed to one end of the crossbeam via a fifth motor mounting seat. The third slider is also fixedly connected to a pallet gripping mechanism. The other side of the crossbeam is provided with a fourth slide rail and a fourth slider, which are slidably connected. The fourth slider is also fixedly connected to a mounting base of a screw-clamping mechanism and a liquid feeding mechanism. A third lead screw is provided inside the crossbeam. The two ends of the third lead screw are supported at corresponding mounting positions at both ends of the crossbeam via third bearing seats. The third lead screw is threadedly engaged with the third slider and the fourth slider via a third lead screw nut. The fifth drive motor is connected to the third lead screw via a third coupling. The third lead screw nut drives the third slider and the pallet gripping mechanism to move linearly along the third slide rail. At the same time, the fourth slider, the screw-clamping mechanism 4, and the liquid feeding mechanism 7 move linearly along the fourth slide rail. The longitudinal beam assembly 53 includes a first longitudinal beam, a sixth drive motor, a fifth slide rail, a fifth slider, and a fourth lead screw placed inside the fifth slide rail. The fifth slide rail is mounted on the first longitudinal beam. The sixth drive motor is fixed to one end of the fifth slide rail via a sixth motor mounting seat. The two ends of the fourth lead screw are supported by fourth bearing seats at corresponding mounting positions at both ends of the fifth slide rail. The sixth drive motor is connected to the fourth lead screw via a fourth coupling. The fourth lead screw and the fifth slider are threadedly engaged via a fourth lead screw nut. The fifth slider is slidably connected to the fifth slide rail. One end of the crossbeam is fixedly connected to the fifth slider. The fourth lead screw nut drives the fifth slider and the crossbeam assembly to move linearly along the fifth slide rail.

[0048] like Figure 10 As shown, the pallet-grabbing mechanism 6 includes a second cylinder 61, guide blocks 62, guide posts 63, a mounting plate 64, a connecting plate 65, and a gripper assembly 66. The gripper assembly 66 is mounted on the mounting plate 64. Guide posts 63 are also provided at both ends of the mounting plate 64. The connecting plate 65 is connected to the two guide blocks 62. Guide holes are provided in the guide blocks 62, and the guide posts 63 are clearance-fitted with the guide holes to ensure smooth and stable movement without shaking. The guide posts 63 are placed in the guide holes. The piston rod of the second cylinder 61 is connected to the mounting plate 64. Under the action of the second cylinder 61, the piston rod drives the gripper assembly 66 to move along the direction of the guide posts 63. The connecting plate 65 is also fixedly connected to a third slider. The gripper assembly 66 includes a double-rod cylinder 661 and two third grippers 662. The two piston rods of the double-rod cylinder 661 are fixedly connected to the two third grippers respectively. The third grippers are in a compact L-shaped bend. The ends of the third grippers have flat gripping contact surfaces 6621. The gripping contact surfaces are provided with anti-slip textures and buffer pads to avoid damaging the carrier and ensure a firm grip.

[0049] like Figure 3 As shown, the cooling mechanism 9 includes a first water tank 91, and a first temperature control element 911 is provided in the first water tank 91. The first temperature control element 911 is a semiconductor cooling chip, which has a fast cooling speed, a temperature control range of 0-25℃, and a temperature control accuracy of ±0.5℃. A liquid level sensor is provided in the water tank, which automatically alarms when the liquid level is low. like Figure 11 As shown, the heating mechanism 10 includes a second water tank 102, in which a heating element 1021 and a second temperature control element 1022 are provided. The heating element 1021 is a stainless steel electric heating tube. It is also equipped with an anti-dry burning protection device that automatically cuts off the power when there is no water.

[0050] The second water tank 102 is provided with a cover assembly 103, which includes a third cylinder 1031, a bellows cover 1032, a mounting frame 1033, a sixth slide rail 1034, and a sixth slider 1035. The bellows cover is made of a high-temperature and corrosion-resistant material, has good sealing performance, and reduces heat loss. The mounting frame 1033 is located at the edge of the opening of the second water tank, and the sixth slide rail 1034 is located on one side of the mounting frame 1033. One end of the bellows cover 1032 is fixedly connected to the sixth slider 1035, and the other end of the bellows cover 1032 is connected to the mounting frame 1033. The sixth slider 1035 is slidably connected to the sixth slide rail 1034, and the sixth slider 1035 is also connected to the piston rod of the third cylinder 1031. Under the action of the third cylinder 1031, the sixth slider 1035 drives one end of the bellows cover to move along the direction of the sixth slide rail. One end of the accordion cover 1032 is also provided with an L-shaped baffle 1036, which is used to limit the height of the accordion cover after compression. A buffer pad is provided at the contact point between the baffle and the mounting frame to reduce collision noise.

[0051] like Figure 12 As shown, the pallet moving assembly 11 includes a pallet horizontal drive assembly 111, a pallet longitudinal drive assembly 112, and a fourth gripper 113; The horizontal drive assembly 111 includes a second longitudinal beam 1111, a seventh drive motor 1112, a seventh slide rail 1113, a seventh slider 1114, and a fifth lead screw placed within the seventh slide rail 1113. The seventh slide rail 1113 is mounted on the second longitudinal beam 1111. The seventh drive motor 1112 is fixed to one end of the seventh slide rail via a seventh motor mounting bracket. The two ends of the fifth lead screw are supported by fifth bearing seats at corresponding mounting positions on both ends of the seventh slide rail 1113. The seventh drive motor is connected to the fifth lead screw via a fifth coupling. The fifth lead screw and the seventh slider are threadedly engaged via a fifth lead screw nut. The slider 1114 is slidably connected to the seventh slide rail 1113, and the longitudinal drive assembly 112 is fixedly connected to the seventh slider 1114. The fifth lead screw nut drives the seventh slider 1114 to move linearly along the seventh slide rail 1113. The seventh slider 1114 is provided with a first sensing plate 11141. The seventh slide rail is provided with a third sensor 1121 and a fourth sensor 1122 (preferably photoelectric sensors or proximity switches) at the preset stopping position of the longitudinal drive assembly 112. The third sensor 1121 and the fourth sensor 1122 correspond to the first target position / second target position of the longitudinal drive assembly 112, respectively. The third sensor 1121 and the fourth sensor 1122 are electrically connected to the controller, and the seventh drive motor 1112 is electrically connected to the controller. The third sensor / fourth sensor is configured to immediately send a position signal to the controller when it senses the first sensing element 11141. The controller outputs a control command based on the signal to adjust the start / stop or forward / reverse rotation of the second drive motor.

[0052] like Figure 13 As shown, the longitudinal drive assembly 112 of the carrier tray includes a cylinder mounting base 1121, a fourth cylinder 1122, and a gripper mounting base 1123. The cylinder mounting base 1121 is fixedly connected to the seventh slider 1114, the fourth cylinder 1122 is fixedly connected to the cylinder mounting base 1121, the drive shaft of the fourth cylinder 1122 is fixedly connected to the gripper mounting base 1123, and the fourth gripper 113 is fixed on the gripper mounting base 1123. The fourth gripper 113 includes a gripper connecting plate 1131 and two support frames 1132. The two support frames 1132 are arranged parallel to each other on the gripper connecting plate 1131. The inner side of the support frame 1132 is provided with an elastic anti-slip pad to adapt to the edge structure of the carrier tray.

[0053] like Figure 14-15 As shown, the shaking mechanism 12 includes a side-opening placement rack 121, a flipping assembly 122, an oscillation assembly 123, and a damping assembly 124. The flipping assembly 122 is configured to rotate the placement rack 121 by 90 degrees, so that the test tube changes from a vertical state to a horizontal state, thereby improving the shaking effect. The oscillation assembly 123 is configured to make the flipped placement rack 121 reciprocate. The placement rack 121 is equipped with a clamping assembly 125, which is configured to clamp the test tubes placed in the placement rack to prevent the test tubes from shaking or colliding during the shaking process. The clamping assembly 125 includes a fifth cylinder 1251 and a pressure plate 1252. The pressure plate 1252 is disposed inside the placement rack 121 and has a flexible buffer layer on its surface. The placement rack has a through hole, and the piston rod of the fifth cylinder 1251 passes through the through hole and connects to the pressure plate 1252. The bottom of the placement rack 121 is provided with a drainage hole 1211 to facilitate the drainage of residual liquid on the surface of the test tubes and keep the placement rack dry and clean. The oscillation assembly 123 includes a base plate 1231, an eighth drive motor 1232, an eccentric wheel 1233, a connecting rod, a second linear guide rail 1234, an eighth slider 1235, and a sliding plate 1236. The eccentric wheel 1233 and the second linear guide rail 1234 are mounted on the base plate 1231. The output shaft of the eighth drive motor 1232 is interference-fitted with the center hole of the eccentric wheel 1233. The eccentric wheel 1233 is connected to the connecting rod, and the connecting rod is connected to the sliding plate 1236. The eighth slider 1235 and the sliding plate 1236 are fixedly connected. The second linear guide rail 1234 is embedded in the eighth slider 1235, and the eighth slider 1235 is connected to the second linear guide rail. The slide plate 1236 is slidably connected to the second linear guide rail 1234. Driven by the eighth drive motor 1232 and the eccentric wheel 1233, the slide plate 1236 moves back and forth along the direction set by the second linear guide rail 1234. When the controller issues a reciprocating command, the eighth drive motor 1232 rotates forward or reverse according to the command, and transmits power to the eccentric wheel through the transmission shaft of the eighth drive motor. The eccentric wheel 1233 drives the slide plate to perform horizontal reciprocating motion 300 times per minute through the connecting rod. Since the eighth slide plate and the second linear guide rail 1234 form a rigid sliding constraint, the slide plate 1236 can only move back and forth along the length of the guide rail and cannot be laterally offset or twisted, ensuring that the test tube tray always moves smoothly along the preset path.

[0054] The damping assembly 124 includes a reference plate 1241, a first damper 1242, and a second damper 1243. The reference plate 1241 is disposed below the base plate 1231. The first damper 1242 is disposed between the reference plate 1241 and the base plate 1231. One end of the second damper 1243 is fixedly connected to the base plate 1231 through a connecting bracket, and the other end of the second damper 1243 is fixedly connected to the worktable 1.

[0055] The flipping assembly 122 includes a rotary cylinder 1221 and a connector 1222. The piston rod of the rotary cylinder 1221 is connected to one end of the connector 1222, and the side of the connector 1222 is welded to the placement frame 121. The rotary cylinder 1221 is fixed on the slide plate by a cylinder mounting seat, and the slide plate is also provided with a buckle for fixing the connector.

[0056] The liquid feeding mechanism uses a pipette, which includes a pipetting body and a motor drive module. The motor drive module controls the movement of the piston inside the pipetting body, thereby achieving liquid aspiration and dispensing through air pressure difference. This mechanism uses an existing structure, which will not be described in detail here.

[0057] like Figure 16-17As shown, the solid feeding mechanism 8 includes a mounting bracket, a storage bin 81, a bin cover 82, a discharge port, a metering screw, a feeding chamber 83, a discharge nozzle 84, a feeding drive motor 85, a reduction gearbox 86, and a coupling 87. The storage bin 81 is fixed above the mounting bracket. The bin cover 82 is threadedly sealed to the top of the storage bin 81. The discharge port at the bottom of the storage bin is sealed to the feeding chamber. The metering screw is rotatably mounted in the feeding chamber, with one end extending below the discharge port. The feeding drive motor is bolted to the corresponding mounting position on the mounting bracket, and its output shaft is connected to the input end of the reduction gearbox via the coupling. The output end of the box is connected to the exposed end of the quantitative screw, and the discharge nozzle is fixed at the bottom discharge port of the feeding chamber. The discharge nozzle 84 is also equipped with a cleaning component 85, which includes a fifth cylinder 851 and a receiving plate 852. The fifth cylinder 851 is fixed on the gantry shifting mechanism 5 through a fifth cylinder mounting seat 853. The piston rod of the fifth cylinder 851 is connected to the receiving plate 852. The fifth cylinder 851 is electrically connected to the electrical control system. By controlling the extension and retraction of the fifth cylinder 851 through the control system, the receiving plate 852 can be driven to reciprocate, thereby completing the functions of leakage collection and station cleaning.

[0058] Example 2 This embodiment provides a workflow for disabling automated pretreatment equipment for azo dye detection, the workflow including: Sample fabric preparation and test tube placement: Cut the sample fabric and put the resulting scraps into test tubes; place the test tubes containing the scraps into the first placement hole 10111 of the carrier tray 100 one by one; place the carrier tray containing the test tubes at the entrance of the feeding mechanism 2. Carrier transfer and positioning: Start the feeding mechanism 2, which drives the carrier 100 to be conveyed along the first linear guide rail 21. When the carrier 100 moves to the position corresponding to the clamping and positioning mechanism 3, it is triggered by the first photoelectric sensor 211, and the feeding mechanism stops running. At the same time, the blocking component rises. Test tube loading and unloading: The screwing clamping mechanism 4 moves to above the carrier plate 100 under the drive of the gantry shifting mechanism 5, and its second jaw 422 clamps the test tube, moving the test tube to the fixed jaw 323 of the clamping and positioning mechanism 3 and positioning it; then the second jaw 422 of the screwing clamping mechanism 4 unscrews the test tube cap by rotating and engaging the inner wall thread. First liquid addition: The liquid addition mechanism 7 moves above the test tube under the drive of the gantry shifting mechanism 5, draws the citrate-sodium hydroxide solution from the reagent bottle, and precisely adds 8ml into the test tube; after the addition is completed, the screw clamping mechanism 4 moves again to screw the test tube cap back onto the test tube; repeat the above actions of taking and placing the test tube, opening the cap, adding the liquid, and screwing the cap on until the liquid addition operation of all test tubes in the entire tray is completed; First heating and heat preservation: The tray gripping mechanism 6, driven by the gantry shifting mechanism 5, grips the entire tray 100 and moves the tray 100 into the second water tank 102 of the heating mechanism 10; the heating and heat preservation program is started to keep the sample in the test tube warm for 30 minutes; after the heat preservation is completed, the tray gripping mechanism 6 takes out the tray and moves it to the first linear guide rail 21 corresponding to the clamping and positioning mechanism 3; Second liquid addition: The screw clamping mechanism 4 moves above the carrier plate 100, clamps the test tube and moves it to the clamping and positioning mechanism 3 for positioning, and unscrews the test tube cap; the liquid addition mechanism 7 moves above the test tube and adds 2 ml of sodium dithionite solution into the test tube; after the addition is completed, the screw clamping mechanism 4 screws the test tube cap back on, and at the same time tilts the test tube through the rotating component, and shakes the test tube under the reciprocating motion of the first conveying component 31 to make the solution initially mixed, and then puts the test tube back into the corresponding placement hole (first placement hole) of the carrier plate 100; repeat the above actions to complete the addition and shaking operation of all test tubes in the entire carrier plate 100; Second heating and heat preservation: The tray gripping mechanism 6 grips the entire tray 100 again and transfers it into the second water tank 102 of the heating mechanism 10, and continues to keep it warm for 30 minutes. Cooling treatment: After the heat preservation is completed, the tray-grabbing mechanism 6 removes the tray from the second water tank 102 and transfers it to the first water tank 91 of the cooling mechanism; the test tube is then cooled for 2 minutes. Third feeding: After cooling, the tray-grabbing mechanism 6 moves the tray to the first linear guide rail 21 corresponding to the clamping and positioning mechanism 3; the clamping mechanism 4 clamps the test tube and moves it to the clamping and positioning mechanism 3 for positioning, and the test tube cap is unscrewed; first, 7g of sodium chloride granules are added to the test tube through the solid feeding mechanism 8, and then 0.5ml of sodium hydroxide solution and 3ml of internal standard solution are added sequentially through the liquid feeding mechanism 9; after feeding, the clamping mechanism 4 is screwed back on the test tube cap, and the test tube is placed back into the corresponding placement hole (first placement hole) of the tray 100; the above actions are repeated to complete the feeding operation of all test tubes in the entire tray; Shaking and mixing: The feeding mechanism 2 is started, and the tray 100 is moved to the corresponding position of the shaking mechanism 12; the tray moving component 11 is activated, and the tray 100 is moved into the placement rack 121 of the shaking mechanism 12, and the pressing component 125 presses the test tube; the shaking mechanism 12 is started, so that the test tube reciprocates in the horizontal direction for 15 minutes to ensure that the material in the test tube is fully mixed and uniform. Carrier removal: After oscillation is completed, the carrier moving component 11 moves to transfer the carrier from the shaking mechanism 12 back to the feeding mechanism 2. The feeding mechanism 2 is started to transport the test tube and carrier that have completed the pretreatment of the banned azo dye to the next target position.

[0059] This invention integrates multiple processes such as feeding, clamping and positioning, twisting, adding, heating, cooling, and shaking. It achieves automated linkage control through an electronic control system, eliminating the need for manual intervention in each stage of the operation and avoiding human error. Each mechanism is arranged in a zone according to the work process, with clear boundaries, shortening the work path and facilitating observation and maintenance by operators.

[0060] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

Claims

1. An automated pretreatment device for detecting prohibited azo dyes, characterized in that, It includes a worktable, a feeding mechanism, a clamping and positioning mechanism, a screwing and clamping mechanism, a gantry shifting mechanism, a pallet grabbing mechanism, a liquid feeding mechanism, a solid feeding mechanism, a cooling mechanism, a heating mechanism, a pallet moving assembly, a shaking mechanism, and an electrical control system; Wherein: feeding mechanism, which is fixedly installed on the workbench, is used to transport the tray along a preset path to the target position corresponding to each process; A clamping and positioning mechanism is provided on the workbench to stably clamp the test tube and move the test tube to the corresponding functional mechanism for operation. A screw-on clamping mechanism is mounted on a gantry shifting mechanism. It is used to clamp and transfer test tubes on a carrier tray into a clamping and positioning mechanism, and simultaneously unscrew the caps of the test tubes; or to tighten the caps of the test tubes on the clamping and positioning mechanism and transfer the processed test tubes back onto the carrier tray. A tray gripping mechanism is mounted on the gantry shifting mechanism and is arranged on different sides of the gantry shifting mechanism, respectively, along with a screwing and clamping mechanism; it is used to grip the tray and move it between the feeding mechanism, cooling mechanism, and heating mechanism. A liquid feeding mechanism is provided, which is mounted on the gantry shifting mechanism and is located on the same side of the gantry shifting mechanism as the screwing and clamping mechanism; it is used to add the required liquid reagent to the test tube placed on the clamping and positioning mechanism. A solid feeding mechanism is provided, which is mounted on the gantry shifting mechanism and is located on the same side of the gantry shifting mechanism as the screwing and clamping mechanism; it is used to add the required solid reagents to the test tubes placed on the clamping and positioning mechanism. A cooling mechanism, which is set on the workbench, is used to perform low-temperature cooling on test tubes placed on a carrier tray; A heating mechanism is provided on the workbench for constant-temperature heating of test tubes placed on a carrier plate. A tray moving assembly is disposed on a worktable and is used to receive and move the tray into the shaking mechanism; A shaking mechanism, which is set on a workbench, is used to thoroughly shake the mixture in the test tube placed in the carrier tray; The electrical control system integrates a PLC controller, a touch screen, and an emergency stop button, and is mounted on a column on one side of the workbench. The feeding mechanism, clamping and positioning mechanism, twisting and clamping mechanism, gantry shifting mechanism, pallet grabbing mechanism, liquid feeding mechanism, solid feeding mechanism, cooling mechanism, heating mechanism, pallet moving assembly, and shaking mechanism are all electrically connected to the electrical control system via wiring, and are uniformly controlled by the electrical control system.

2. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The feeding mechanism is provided in two sets, and the two sets of feeding mechanisms are arranged in a straight line back and forth. The feeding mechanism includes a first linear guide rail, a transmission belt, a drive wheel, a driven wheel, and a first drive motor. The first linear guide rail has an L-shaped cross-section. The first drive motor is located at one end of the first linear guide rail. The drive shaft of the first drive motor is connected to the drive wheel. The other end of the first linear guide rail is provided with a driven wheel. The transmission belt is tensioned between the drive wheel and the driven wheel. The transmission belt is configured to convey material between the upper and lower sides of the L-shaped transverse side of the first linear guide rail. The first linear guide rail is equipped with a first photoelectric sensor and a second photoelectric sensor. The first photoelectric sensor is configured to send a signal to the controller when it senses the carrier disk, and the controller adjusts the start of the first drive motor. The second photoelectric sensor is configured to send a signal to the controller when it senses the carrier disk, and the controller adjusts the shutdown of the first drive motor.

3. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The clamping and positioning mechanism includes a first conveying component, a clamping component, and a rotating component. The clamping component includes a second motor mounting base, at least one second drive motor, and at least one fixed gripper. The second drive motor is mounted on the second motor mounting base, and the drive shaft of the second drive motor is coaxially fixed with the drive shaft of the fixed gripper. The second drive motor is used to drive the fixed gripper to open and close. One of the fixed grippers is equipped with an L-shaped placement plate for holding the test tube held by the fixed gripper; each of the second drive motors is equipped with a third photoelectric sensor, which is configured to sense whether the carrier plate is in place; The first conveying assembly includes a base, a third drive motor, a third motor mounting base, a first slide rail, a first slider, and a first lead screw placed inside the first slide rail. The first slide rail is fixed on the base. The third drive motor is fixed to one end of the first slide rail via the third motor mounting base. The two ends of the first lead screw are supported by the first bearing seats at the corresponding mounting positions at both ends of the first slide rail. The third drive motor is connected to the first lead screw via a first coupling. The first lead screw and the first slider are threadedly engaged by the first lead screw nut. The first slider is slidably connected to the first slide rail. The second motor mounting base is disposed on the first slider. The first lead screw nut drives the first slider and the second motor mounting base disposed on the first slider to move linearly along the first slide rail. The rotating assembly includes a rotary motor, the drive shaft of which is connected to the first slider, and the rotary motor is configured to drive the clamping assembly to rotate via the first slider.

4. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The screwing and clamping mechanism includes at least one second conveying component and at least one screwing and clamping component. The second conveying component includes a mounting base, a fourth drive motor, a fourth motor mounting base, a second slide rail, a second slider, and a second lead screw placed inside the second slide rail. The second slide rail is fixed on the mounting base. The fourth drive motor is fixed to one end of the second slide rail via the fourth motor mounting base. The two ends of the second lead screw are supported by second bearing seats at corresponding mounting positions at both ends of the second slide rail. The fourth drive motor is connected to the second lead screw via a second coupling. The second lead screw and the second slider are threadedly engaged by a second lead screw nut. The second slider is slidably connected to the second slide rail. The screwing and clamping component is disposed on the second slider. The second lead screw nut drives the second slider and the screwing and clamping component disposed on the second slider to move linearly along the second slide rail. The screw-on clamping assembly includes a first cylinder and a second jaw. The piston rod of the first cylinder and the second jaw are fixedly connected. The inner wall of the second jaw is provided with internal threads. The piston rod of the first cylinder is configured to drive the second jaw to perform a clamping action. The second jaw can rotate around its own axis to cooperate with the inner wall threads to complete the screw-on action.

5. The automated pretreatment equipment for detecting banned azo dyes according to claim 4, characterized in that, The gantry shifting mechanism includes a column, a crossbeam assembly, and two longitudinal beam assemblies. The two ends of the longitudinal beam assembly are fixedly connected to the column, and the crossbeam assembly is slidably connected to the longitudinal beam assembly. The crossbeam assembly includes a crossbeam, a fifth motor mounting base, and a fifth drive motor. One side of the crossbeam is provided with a third slide rail and a third slider, which are slidably connected. The fifth drive motor is fixed to one end of the crossbeam via the fifth motor mounting base. The third slider is also fixedly connected to a pallet-grabbing mechanism. The other side of the crossbeam is provided with a fourth slide rail and a fourth slider, which are slidably connected. The fourth slider is also fixedly connected to a mounting base of a screw-clamping mechanism and a liquid feeding mechanism. A third lead screw is provided inside the crossbeam. The two ends of the third lead screw are supported at corresponding mounting positions at both ends of the crossbeam via third bearing seats. The third lead screw is threadedly engaged with the third slider and the fourth slider via a third lead screw nut. The fifth drive motor is connected to the third lead screw via a third coupling. The third lead screw nut drives the third slider and the pallet-grabbing mechanism to move linearly along the third slide rail, while simultaneously the fourth slider, the screw-clamping mechanism, and the liquid feeding mechanism move linearly along the fourth slide rail. The longitudinal beam assembly includes a first longitudinal beam, a sixth drive motor, a sixth motor mounting base, a fifth slide rail, a fifth slider, and a fourth lead screw placed within the fifth slide rail. The fifth slide rail is mounted on the first longitudinal beam. The sixth drive motor is fixed to one end of the fifth slide rail via the sixth motor mounting base. The two ends of the fourth lead screw are supported by fourth bearing seats at corresponding mounting positions on both ends of the fifth slide rail. The sixth drive motor is connected to the fourth lead screw via a fourth coupling. The fourth lead screw and the fifth slider are threadedly engaged by a fourth lead screw nut. The fifth slider is slidably connected to the fifth slide rail. One end of the crossbeam is fixedly connected to the fifth slider. The fourth lead screw nut drives the fifth slider and the crossbeam assembly to move linearly along the fifth slide rail.

6. The automated pretreatment equipment for detecting banned azo dyes according to claim 5, characterized in that, The pallet gripping mechanism includes a second cylinder, guide blocks, guide posts, a mounting plate, a connecting plate, and a gripper assembly. The gripper assembly is mounted on the mounting plate, and guide posts are provided at both ends of the mounting plate. The connecting plate is connected to the two guide blocks, and guide holes are provided in the guide blocks. The guide posts are placed in the guide holes. The piston rod of the second cylinder is connected to the mounting plate. Under the action of the second cylinder, the piston rod drives the gripper assembly to move along the direction of the guide posts. The connecting plate is also fixedly connected to a third slider. The gripper assembly includes a double-rod cylinder and two third grippers. The two piston rods of the double-rod cylinder are fixedly connected to the two third grippers respectively, and the ends of the third grippers have flat gripping contact surfaces.

7. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The cooling mechanism includes a first water tank, and a first temperature control element is provided in the first water tank; The heating mechanism includes a second water tank, in which a heating element and a second temperature control element are disposed. A cover assembly is provided on the second water tank, the cover assembly including a third cylinder, a bellows cover, a mounting frame, a sixth slide rail, and a sixth slider. The mounting frame is located at the edge of the opening of the second water tank, the sixth slide rail is located on one side of the mounting frame, one end of the bellows cover is fixedly connected to the sixth slider, and the other end of the bellows cover is connected to the mounting frame; the sixth slider is slidably connected to the sixth slide rail, and the sixth slider is also connected to the piston rod of the third cylinder. Under the action of the third cylinder, the sixth slider drives one end of the bellows cover to move along the direction of the sixth slide rail. One end of the accordion cover is also provided with an L-shaped baffle to limit the height of the accordion cover after compression.

8. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The pallet moving assembly includes a pallet horizontal drive assembly, a pallet longitudinal drive assembly, and a fourth gripper. The horizontal drive assembly for the carrier plate includes a second longitudinal beam, a seventh drive motor, a seventh slide rail, a seventh slider, and a fifth lead screw placed inside the seventh slide rail. The seventh slide rail is mounted on the second longitudinal beam. The seventh drive motor is fixed to one end of the seventh slide rail via a seventh motor mounting seat. The two ends of the fifth lead screw are supported by fifth bearing seats at corresponding mounting positions at both ends of the seventh slide rail. The seventh drive motor is connected to the fifth lead screw via a fifth coupling. The fifth lead screw and the seventh slider are threadedly engaged by a fifth lead screw nut. The seventh slider is slidably connected to the seventh slide rail. The longitudinal drive assembly is fixedly connected to the seventh slider. The fifth lead screw nut drives the seventh slider to move linearly along the seventh slide rail. The longitudinal drive assembly of the carrier includes a cylinder mounting base, a fourth cylinder and a gripper mounting base. The cylinder mounting base is fixedly connected to the seventh slider, the fourth cylinder is fixedly connected to the cylinder mounting base, the drive shaft of the fourth cylinder is fixedly connected to the gripper mounting base, and the fourth gripper is fixed on the gripper mounting base. The fourth gripper includes a gripper connecting plate and two support frames, which are arranged in parallel on the gripper connecting plate.

9. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The shaking mechanism includes a side-opening placement frame, a flipping assembly, an oscillation assembly, and a damping assembly. The flipping assembly is configured to rotate the placement frame by 90 degrees, and the oscillation assembly is configured to make the flipped placement frame reciprocate. The placement rack is equipped with a clamping assembly configured to clamp the test tubes placed inside the placement rack; the clamping assembly includes a fifth cylinder and a pressure plate, the pressure plate is disposed inside the placement rack, the placement rack has a through hole, and the piston rod of the fifth cylinder passes through the through hole and is connected to the pressure plate; the bottom of the placement rack is provided with a drainage hole; The flipping assembly includes a rotary cylinder and a connector. The piston rod of the rotary cylinder is connected to one end of the connector, and the side of the connector is welded to the placement frame. The oscillation assembly includes a base plate, an eighth drive motor, an eccentric wheel, a connecting rod, a second linear guide rail, an eighth slider, and a sliding plate. The eccentric wheel and the second linear guide rail are mounted on the base plate. The output shaft of the eighth drive motor is interference-fitted with the center hole of the eccentric wheel. The eccentric wheel is connected to the connecting rod, the connecting rod is connected to the sliding plate, the eighth slider and the sliding plate are fixedly connected, and the second linear guide rail is embedded in the eighth slider and slidably connected to the second linear guide rail. The sliding plate reciprocates along the direction set by the second linear guide rail under the drive of the eighth drive motor and the eccentric wheel. The damping assembly includes a reference plate, a first damper, and a second damper. The reference plate is located below the base plate, the first damper is located between the reference plate and the base plate, one end of the second damper is fixedly connected to the base plate through a connecting frame, and the other end of the second damper is fixedly connected to the worktable.

10. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The solid feeding mechanism includes a mounting bracket, a storage bin, a bin cover, a discharge port, a metering screw, a feeding chamber, a discharge nozzle, a feeding drive motor, a gearbox, and a sixth coupling. The storage bin is fixed above the mounting bracket. The bin cover is threaded and sealed to the top of the storage bin. The discharge port at the bottom of the storage bin is sealed to the feeding chamber. The metering screw is rotatably mounted in the feeding chamber, with one end extending below the discharge port. The feeding drive motor is bolted to the corresponding mounting position on the mounting bracket. Its output shaft is connected to the input end of the gearbox via the sixth coupling. The output end of the gearbox is driven by the exposed end of the metering screw. The discharge nozzle is fixed at the bottom discharge port of the feeding chamber. A cleaning component is also provided at the discharge nozzle. The cleaning component includes a fifth cylinder and a receiving plate. The piston rod of the fifth cylinder is connected to the receiving plate. The fifth cylinder is electrically connected to the electrical control system, and the extension and retraction of the fifth cylinder is controlled by the control system.

11. The automated pretreatment equipment for detecting banned azo dyes according to claim 1, characterized in that, The workbench is equipped with reagent bottles, a liquid dispensing box, and a pipette tip rack in the area near the liquid dispensing mechanism. The liquid dispensing box and reagent bottles are pre-filled with the target reagents required for the pretreatment of banned azo dyes. The pipette tip rack is used to place the pipette tips required by the liquid dispensing mechanism. The pipette tip rack has a multi-layer structure and has multiple placement areas. The number of placement positions in each placement area is the same as the number of placement positions on the carrier tray.

12. The automated pretreatment equipment for detecting banned azo dyes according to claim 11, characterized in that, The liquid feeding mechanism includes a liquid dispenser, a liquid dispensing needle, and a needle holder. The liquid dispensing needle is mounted on the needle holder. The needle holder is fixed on the gantry shifting mechanism. The reagent bottle, the liquid dispenser, and the liquid dispensing needle are connected by a delivery pipeline.

13. A workflow for an automated pretreatment device for disabling azo dye detection, characterized in that, The workflow described herein applies to an automated pretreatment device for detecting banned azo dyes as described in any one of claims 1-12, and the workflow includes: Sample fabric preparation and test tube placement: Cut the sample fabric and put the resulting scraps into test tubes; place the test tubes containing the scraps into the first placement hole of the carrier tray one by one; place the carrier tray containing the test tubes at the inlet of the feeding mechanism. Carrier tray transfer and positioning: Start the feeding mechanism, which drives the carrier tray to be conveyed along the first linear guide rail. When the carrier tray moves to the position corresponding to the clamping and positioning mechanism, it is triggered by the first photoelectric sensor, and the feeding mechanism stops running. At the same time, the blocking component rises. Test tube loading and unloading: The screwing clamping mechanism moves to the top of the tray under the drive of the gantry shifting mechanism. Its second jaw clamps the test tube and moves the test tube to the fixed jaw of the clamping and positioning mechanism for positioning. Then, the second jaw of the screwing clamping mechanism unscrews the test tube cap by rotating and engaging the inner wall thread. First liquid addition: The liquid addition mechanism moves above the test tube under the drive of the gantry shifting mechanism, draws the citrate-sodium hydroxide solution from the reagent bottle, and precisely adds 8ml into the test tube; after the addition is completed, the screw clamping mechanism moves again to screw the test tube cap back onto the test tube; repeat the above actions of taking and placing the test tube, opening the cap, adding the solution, and screwing the cap on until the liquid addition operation of all test tubes in the entire tray is completed; First heating and heat preservation: The tray gripping mechanism, driven by the gantry shifting mechanism, grips the entire tray and moves it to the second water tank of the heating mechanism; the heating and heat preservation program is started to keep the sample in the test tube warm for 30 minutes; after the heat preservation is completed, the tray gripping mechanism takes out the tray and moves it to the first linear guide rail corresponding to the clamping and positioning mechanism. Second liquid addition: The screw-on clamping mechanism moves above the carrier tray, clamps the test tube, and moves it to the clamping and positioning mechanism for positioning. The test tube cap is then unscrewed. The liquid addition mechanism moves above the test tube and adds 2 ml of sodium dithionite solution into the test tube. After addition, the screw-on clamping mechanism screws the test tube cap back on and simultaneously tilts the test tube using the rotating component. The test tube is shaken by the reciprocating motion of the first conveying component to initially mix the solution. The test tube is then placed back into the corresponding placement hole on the carrier tray. The above actions are repeated to complete the addition and shaking operation for all test tubes in the entire carrier tray. Second heating and heat preservation: The tray grabbing mechanism grabs the entire tray again and transfers it to the second water tank of the heating mechanism for continued heat preservation for 30 minutes. Cooling treatment: After the heat preservation is completed, the tray-grabbing mechanism removes the tray from the second water tank and transfers it to the first water tank of the cooling mechanism; the test tube is then cooled for 2 minutes. Third feeding: After cooling, the tray-grabbing mechanism moves the tray to the first linear guide rail corresponding to the clamping and positioning mechanism; the clamping mechanism clamps the test tube and moves it to the clamping and positioning mechanism for positioning, and the test tube cap is unscrewed; first, 7g of sodium chloride granules are added to the test tube through the solid feeding mechanism, and then 0.5ml of sodium hydroxide solution and 3ml of internal standard solution are added sequentially through the liquid feeding mechanism; after feeding, the clamping mechanism is screwed back on, and the test tube is placed back into the corresponding placement hole of the tray; the above actions are repeated to complete the feeding operation of all test tubes in the entire tray; Shaking and mixing: The feeding mechanism is started, and the tray is moved to the corresponding position of the shaking mechanism; the tray moving component moves, and the tray is moved to the placement rack of the shaking mechanism, and the pressing component presses the test tube; the shaking mechanism is started, so that the test tube reciprocates in the horizontal direction for 15 minutes to ensure that the material in the test tube is fully mixed and uniform. Carrier removal: After oscillation is completed, the carrier moving component moves to move the carrier from the shaking mechanism back to the feeding mechanism. The feeding mechanism is then started to transport the test tubes and carriers that have completed the pretreatment of the banned azo dyes to the next target position.

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