Full-automatic free silicon dioxide measurement pretreatment device

Abstract

The utility model discloses a full-automatic free silicon dioxide measurement pretreatment device which comprises a grabbing unit for grabbing or placing a reaction container and a filtering device, the sample placing unit is used for placing the reaction container and the filtering device; the stirring digestion unit comprises a constant-temperature heating module and a stirring module, the constant-temperature heating module is used for carrying out heat transfer on the reaction container, and the stirring module is used for stirring reactants in the reaction container; the pouring and diluting unit is used for diluting, washing and pouring reactants in the reaction container; the filtering unit comprises a filtering temperature control module, and the filtering temperature control module ensures that reactants are filtered at a constant temperature; the liquid conveying unit comprises a liquid conveying pipe and a conveying pump, and the liquid conveying pipe is connected with the reagent bottle and the output pump and conveys the reagent to any one of the units. By means of the structural design, the problems that in the prior art, manual detection is adopted, the operation process is tedious, and the requirements for the technology and the meticulous degree of personnel are high in the detection process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust detection, in particular to a full-automatic free silicon dioxide determination pre-processing device. Background Art

[0002] Currently, the pyrophosphate method specified in GBZ / T192.4-2007 Determination of Dust in Workplace Air Part 4: Free Silica Content is used to detect the free silica content in dust. The pyrophosphate method has low requirements for instruments and experimental conditions and has the advantage of low experimental cost. Under the premise of no interference from insoluble substances, it is considered to be a reliable, accurate and practical method. It is the preferred method of various third-party testing agencies and laboratories. However, in the pyrophosphate method, the temperature when the dust sample is dissolved must be strictly controlled between 245℃ and 250℃. If the temperature is too high, it is easy to form gel, and if the temperature is too low, there is a risk of incomplete reaction. Therefore, continuous stirring is required during the dissolution process to ensure that the dust is evenly dispersed in the pyrophosphate with uniform temperature.

[0003] Currently, this method mainly uses manual detection, which has a cumbersome and time-consuming operation process and requires high reaction conditions. In addition, during the detection process, it places high demands on the experimenter's skills and meticulousness.

[0004] Therefore, it is urgent to design and develop a fully automatic free silica determination pretreatment device to overcome the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a fully automatic free silica determination pretreatment device, which solves the problems of needing to adopt manual detection, complicated operation process, long time consumption, high requirements on reaction conditions, and high requirements on the technology and meticulousness of the experimenter during the detection process.

[0006] In order to solve the above technical problems, the utility model provides a fully automatic free silica determination pretreatment device, comprising a grabbing unit, the grabbing unit comprising a clamping mechanism, the clamping mechanism being used to grab or place a reaction container and a filtering device;

[0007] a sample placement unit, located on one side of the grabbing unit and used for placing a reaction container and a filtering device;

[0008] A stirring and digestion unit is located on one side of the sample placement unit. The reaction vessel on the sample placement unit is moved into the stirring and digestion unit based on the clamping mechanism. The stirring and digestion unit includes a constant temperature heating module and a stirring module. The constant temperature heating module is located at the bottom of the stirring and digestion unit and performs heat transfer with the reaction vessel. The stirring module stirs the reactants in the reaction vessel.

[0009] A pouring and diluting unit, located on one side of the grabbing unit, is used to dilute and rinse the reactants in the reaction container and pour the diluted reactants;

[0010] A filtration unit, located on one side of the pouring and dilution unit, filters the reactants poured by the pouring and dilution unit, wherein the filtration unit includes a filtration temperature control module, and the filtration temperature control module is used to ensure that the reactants are filtered at a constant temperature;

[0011] A liquid delivery unit is located on one side of the stirring and digestion unit. The liquid delivery unit includes a liquid delivery pipe and a delivery pump. The liquid delivery pipe is connected to the reagent bottle, and based on the delivery pump, the reagent in the reagent bottle is delivered to any one of the stirring and digestion unit, the pouring and dilution unit, and the filtration unit.

[0012] As an improvement of the present invention, the liquid delivery unit also includes a stop valve and a liquid heating device. The stop valve is used to control the opening and closing of the pipeline. The liquid heating device is used to heat or keep the liquid warm. The liquid transmission pipe includes a phosphoric acid pipe, a hydrochloric acid pipe, and a distilled water pipe.

[0013] As an improvement of the present invention, the gripping unit further includes an X-axis linear motor, a Y-axis linear motor, and a Z-axis linear motor, and the robotic arm moves laterally based on the X-axis linear motor, moves vertically based on the Y-axis linear motor, and moves longitudinally based on the Z-axis linear motor;

[0014] And / or the clamping mechanism includes a clamping claw and a mechanical arm connected to the clamping claw, which is used to grab or place the reaction container and the filtering device.

[0015] As an improvement of the present invention, the sample placement unit includes a reaction vessel placement rack, a filter device placement rack and a rotating motor, the reaction vessel placement rack and the filter device placement rack are coaxially arranged, the reaction vessel placement rack is located above the filter device placement rack, and the rotating motor drives the reaction vessel placement rack and the filter device placement rack to rotate;

[0016] And / or the reaction container placement rack and the filter device placement rack are both configured as circular turntable structures.

[0017] As an improvement of the present invention, the stirring module includes a graphite pressure plate, a graphite grinding plate, a stirring rod and a stirring motor. The graphite pressure plate is connected to the lifting module, the graphite grinding plate is installed in the graphite pressure plate, and the stirring motor is installed above the graphite pressure plate. One end of the stirring rod is connected to the stirring motor, and the other end extends downward through the graphite pressure plate to stir the reactants in the reaction vessel.

[0018] As an improvement of the present invention, the stirring and digestion unit further includes a lifting module, which is used to control the stirring module to move up and down along the axial direction of the stirring and digestion unit to stir the reactants in the reaction container.

[0019] As an improvement of the present invention, the pouring and dilution unit includes a reaction container fixing mechanism, a pouring mechanism and a dilution and flushing mechanism. The reaction container fixing mechanism is connected to the pouring mechanism, and the bottom of the reaction container fixing mechanism is suspended in the air. The pouring mechanism controls the rotation and pouring of the reaction container in the reaction container fixing mechanism, and the dilution and flushing mechanism is used to flush the reaction container in the reaction container fixing mechanism.

[0020] As an improvement of the present invention, the reaction vessel fixing mechanism includes a fixing bracket, a reaction vessel bracket, a cover, a linear motor, and an elastic member. One side of the reaction vessel bracket is rotatably connected to the fixing bracket. The reaction vessel is fixed to the reaction vessel bracket. The reaction vessel rotates along with the reaction vessel bracket based on the control of the dumping mechanism. The cover is connected to the linear motor to slide along the axial direction of the fixing bracket. The top of the cover is provided with an elastic member.

[0021] The cover body is configured as a semicircular structure.

[0022] As an improvement of the present invention, the filter unit further comprises a guide plate, and the guide plate is connected to the liquid transport unit;

[0023] And / or the filtering temperature control module is configured as a constant temperature filtering tank.

[0024] As an improvement of the present invention, it also includes a cleaning unit, which is installed on the sample placement unit. The cleaning unit includes a nozzle and a cleaning motor. The nozzle is connected to the liquid transport unit and is connected to the cleaning motor. The nozzle is driven by the cleaning motor to rotate and spray to clean the filter device until the filter paper in the filter device is cleaned to no acid reaction. Free silica will eventually remain on the filter paper. After the preliminary treatment of this design, the filter paper is used as a sample for subsequent processing and testing.

[0025] After adopting such a design, the utility model has at least the following advantages:

[0026] The technical solution of the present invention is to set up an automated pre-treatment device, so that the process of obtaining reaction reagents, performing digestion reactions and dilution and filtration no longer requires manual operation by the experimenter, which reduces the difficulty of the experiment and improves the controllability and detection accuracy of the experimental process. In addition, the fully automatic free silica determination pre-treatment device proposed by the present invention adopts artificial operation, has small residue, and improves the controllability and detection accuracy of the experimental process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Figure 1 This is a schematic diagram of the overall structure of a fully automatic free silicon dioxide determination pre-treatment device of the utility model;

[0029] Figure 2 It is a structural diagram of the grabbing unit in the utility model;

[0030] Figure 3 It is a structural schematic diagram of the sample placement unit in the utility model;

[0031] Figure 4 It is a structural diagram of the stirring and digestion unit in the utility model;

[0032] Figure 5 It is a structural diagram of the pouring and dilution unit in the utility model;

[0033] Figure 6 yes Figure 5 A schematic structural diagram of the middle dumping dilution unit from another perspective;

[0034] Figure 7 It is a structural diagram of the filter unit in the utility model;

[0035] Figure 8 It is a structural diagram of the cleaning unit in the utility model;

[0036] Figure 9 It is a structural diagram of the liquid delivery unit in the utility model.

[0037] Description of reference numerals:

[0038] 1. Grasping unit; 110. Gripping mechanism; 101. Gripping claw; 102. Robotic arm; 103. X-axis linear motor; 104. Y-axis linear motor; 105. Z-axis linear motor;

[0039] 2. Sample placement unit; 201. Reaction vessel placement rack; 202. Filter device placement rack;

[0040] 3. Stirring and digestion unit; 310. Constant temperature heating module; 320. Stirring module; 321. Graphite pressure plate; 322. Graphite grinding disc; 323. Stirring rod; 324. Stirring motor; 330. Lifting module;

[0041] 4. Liquid delivery unit; 401. Liquid delivery pipe; 402. Delivery pump; 403. Liquid heating device;

[0042] 5. Dumping and dilution unit; 510. Dumping mechanism; 520. Reaction vessel fixing mechanism; 521. Fixing bracket; 522. Reaction vessel bracket; 523. Cover; 524. Linear motor; 525. Elastic member; 530. Dilution and flushing mechanism;

[0043] 6. Filter unit; 601. Guide plate; 602. Constant temperature filter tank; 603. Filter device;

[0044] 7. Cleaning unit; 701. Cleaning motor; 702. Nozzle. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0046] The utility model discloses a fully automatic free silica determination pretreatment device. Currently, silica determination is mainly carried out by the pyrophosphate method. When the dust sample is dissolved in the pyrophosphate method, the temperature must be strictly controlled between 245°C and 250°C. If the temperature is too high, it is easy to form gel, and if the temperature is too low, there is a risk of incomplete reaction. Therefore, continuous stirring is required during the dissolution process to ensure that the dust is evenly dispersed in the pyrophosphate with uniform temperature. In addition, during the above steps, manual detection is usually used. The operation process is cumbersome, time-consuming, and has high requirements for reaction conditions. In addition, during the detection process, high requirements are placed on the experimental personnel's skills and meticulousness. The fully automatic free silica determination pretreatment device mainly solves the above problems.

[0047] Next, combine Figures 1 to 8 The utility model describes a fully automatic free silicon dioxide determination pre-treatment device.

[0048] The fully automatic free silica determination pretreatment device is provided with a support frame, which is used to support and fix each unit. The grabbing unit 1 is vertically fixed on the support frame through the support frame. The reaction containers and filtering devices located on other units are taken and placed by moving the clamping mechanism 110 within the grabbing unit 1. The sample placement unit 2, stirring and digestion unit 3, pouring and dilution unit 5, filtering unit 6, liquid delivery unit 4 and cleaning unit 7 are all fixed by the support frame and are automatically processed according to the experimental steps of determining the free silica content by the pyrophosphate method.

[0049] like Figure 1As shown, a fully automatic free silica determination pretreatment device includes a grabbing unit 1, the grabbing unit 1 includes a clamping mechanism 110, the clamping mechanism 110 is used to grab or place a reaction container and a filtering device, the sample placement unit 2 is located on one side of the grabbing unit 1, and is used to place the reaction container and the filtering device, the stirring and digestion unit 3 is located on one side of the sample placement unit 2, and the reaction container located on the sample placement unit 2 is moved into the stirring and digestion unit 3 based on the clamping mechanism 110, the stirring and digestion unit 3 includes a constant temperature heating module 310 and a stirring module 320, the constant temperature heating module 310 is located at the bottom of the stirring and digestion unit 3 to transfer heat with the reaction container, and the stirring module 320 stirs the reactants in the reaction container and tilts the sample. The pouring dilution unit 5 is located on one side of the grabbing unit 1, and is used to dilute and rinse the reactants in the reaction container, and pour the diluted reactants onto the filtering device of the filtering unit 6. The filtering unit 6 is located on one side of the pouring dilution unit 5, and filters the reactants poured by the pouring dilution unit 5. The filtering unit 6 includes a filtration temperature control module, which is used to ensure that the reactants are filtered at a constant temperature. The liquid delivery unit 4 is located on one side of the stirring and digestion unit 3. The liquid delivery unit 4 includes a liquid transmission pipe 401 and a delivery pump 402. The liquid transmission pipe 401 is connected to the reagent bottle, and based on the delivery pump 402, the reagent in the reagent bottle is delivered to any one of the stirring and digestion unit 3, the pouring dilution unit 5, and the filtration unit 6.

[0050] Specifically, the reaction vessels containing the samples are placed in the reaction vessel placement rack 201 in sequence according to the serial number, and the filter devices containing the filter paper are placed in the filter device placement rack 202 in sequence according to the serial number. The clamping mechanism 110 on the grabbing unit 1 is used to grab or place the reaction vessel and the filter device. The reaction vessel on the reaction vessel placement rack 201 is moved to the stirring and digestion unit 3 through the clamping mechanism 110. The constant temperature heating module 310 in the stirring and digestion unit 3 is quickly heated to 240°C to 250°C. At the same time, the lifting module 330 drives the stirring module 320 to descend and press the reaction vessel. The stirring module 3 20 stirs the reactants in the reaction vessel. At this time, the clamping mechanism 110 moves the filter device corresponding to the reaction vessel serial number from the filter device placement rack 202 to the filter temperature control module. After the reaction of the reactants in the reaction vessel in the stirring and digestion unit 3 is completed, the clamping mechanism 110 moves the reaction vessel to the pouring and dilution unit 5. The pouring and dilution unit 5 drives the reaction vessel to perform a pouring action, and pours the reactants in the reaction vessel into the filter device 603 on the filter temperature control module. After the liquid level in the filter device 603 drops, the clamping mechanism 110 moves the filter device 603 and the reaction vessel back to the sample placement unit 2.

[0051] Specifically, the liquid delivery unit 4 also includes a liquid heating device 403. The liquid delivery unit 4 is used to deliver liquid to each unit or collect waste liquid. The liquid delivery unit 4 has multiple reagent bottles. The liquid transmission tube 401 is connected to the reagent bottle. The reagent in the reagent bottle is pumped to each unit through the delivery pump 402. The liquid heating device 403 is used to deliver liquid that needs to be heated or kept warm.

[0052] It can be understood that the liquid transmission tube 401 includes a phosphoric acid tube, a hydrochloric acid tube, a distilled water tube, etc. One end of the liquid transmission tube 401 is connected to the reagent bottle, and the other end delivers the reagent to the reaction vessel through the delivery pump 402. It should be noted that the reaction vessel includes a beaker, a conical flask, etc., and the delivery pump 402 includes but is not limited to a diaphragm pump, a peristaltic pump, etc. When the clamping mechanism 110 moves the reaction vessel to the stirring and digestion unit 3, the liquid transmission unit 4 delivers the phosphoric acid reagent in the reagent bottle to the reaction vessel through the phosphoric acid tube in the liquid transmission tube 401. The stirring and digestion unit 3 completes the digestion reaction of the sample, and the pouring and dilution unit 5 dilutes the digestion solution and pours it into the filtration unit 6 to complete the filtration reaction of the sample. Through this fully automatic free silica determination pretreatment device, the process of detecting the free silica content in the dust no longer requires manual operation by the experimenter, and the reaction reagents, stirring and digestion reactions, and dilution and filtration operations can be obtained. Manual operation of the experimenter is no longer required, which reduces the difficulty of the experiment and improves the controllability and detection accuracy of the experimental process.

[0053] like Figure 1 and Figure 2 As shown, the clamping mechanism 110 includes a clamping jaw 101, an X-axis linear motor 103, a Y-axis linear motor 104, a Z-axis linear motor 105, and a robotic arm 102 connected to the clamping jaw 101, which is used to grasp or place the reaction container and the filtering device 603. The robotic arm 102 moves laterally based on the X-axis linear motor 103, moves vertically based on the Y-axis linear motor 104, and moves longitudinally based on the Z-axis linear motor 105.

[0054] Preferably, the grasping unit 1 also includes an electric actuator, a sensor, etc. to improve the operating accuracy and controllability of the clamping mechanism 110. The robotic arm 102 includes but is not limited to a three-axis robotic arm 102, a six-axis robotic arm 102, etc. In this embodiment, the robotic arm 102 uses a three-axis robotic arm 102 to drive the gripper 101 to grasp or place the reaction container and the filter device.

[0055] like Figure 3As shown, the sample placement unit 2 includes a reaction vessel placement rack 201, a filter device placement rack 202 and a rotating motor. The reaction vessel placement rack 201 and the filter device placement rack 202 are coaxially arranged. The reaction vessel placement rack 201 is located above the filter device placement rack 202. The rotating motor drives the reaction vessel placement rack 201 and the filter device placement rack 202 to rotate. The reaction vessel placement rack 201 and the filter device placement rack 202 are both configured as circular turntable structures.

[0056] It can be understood that the reaction vessel placement rack 201 is provided with a cup mouth positioning device, which can fix the cup mouth of the reaction vessel in a specified direction. The reaction vessels containing samples are placed in the reaction vessel placement rack 201 in sequence according to the serial number, and the filter devices containing filter paper are placed in the filter device placement rack 202 in sequence according to the serial number and wait for the clamping mechanism 110 to grab or place them.

[0057] like Figure 4 As shown, the stirring and digestion unit 3 also includes a lifting module 330, which is used to control the stirring module 320 to move up and down along the axial direction of the stirring and digestion unit 3 to stir the reactants in the reaction vessel. The stirring module 320 includes a graphite pressure plate 321, a graphite grinding plate 322, a stirring rod 323 and a stirring motor 324. The graphite pressure plate 321 is fixedly connected to the lifting module 330, and the graphite pressure plate 321 is driven up and down by the lifting module 330. The graphite grinding plate 322 is installed in the graphite pressure plate 321, and the stirring motor 324 is installed above the graphite pressure plate 321. One end of the stirring rod 323 is connected to the stirring motor 324, and the other end extends downward through the graphite pressure plate 321. The graphite pressure plate 321 moves downward so that the other end of the stirring rod 323 extends into the reaction vessel to stir and digest the reactants in the reaction vessel.

[0058] like Figure 5 and Figure 6As shown, the pouring and dilution unit 5 includes a reaction vessel fixing mechanism 520, a pouring mechanism 510 and a dilution and flushing mechanism 530. The reaction vessel fixing mechanism 520 is connected and fixed to the pouring mechanism 510. The bottom of the reaction vessel fixing mechanism 520 is suspended and rotates with the pouring mechanism 510. The dilution and flushing mechanism 530 is used to flush the reaction vessel in the reaction vessel fixing mechanism 520. The reaction vessel fixing mechanism 520 includes a fixing bracket 521, a reaction vessel bracket 522, a cover 523, a linear motor 524 and an elastic member 525. One side of the reaction vessel bracket 522 is connected and fixed to the fixing bracket 521. The cover 523 is connected to the linear motor 524 to slide along the axial direction of the fixing bracket 521. An elastic member 525 is provided on the top of the cover 523. The cover 523 is set to a semicircular structure. The reaction liquid in the reaction vessel can be discharged from the cover The liquid flows out through the gap 523, the fixed bracket 521 is connected and fixed to the support frame, and the reaction vessel bracket 522 is rotatably installed on the fixed bracket 521. The reaction vessel bracket 522 is swung about 90 degrees by the dumping mechanism 510 to dump the liquid. Specifically, the dumping mechanism 510 drives the synchronous pulley to rotate through the motor, thereby driving the reaction vessel bracket 522 fixed on the pulley shaft to rotate the angle to dump the liquid. The cover body 523 is driven by the linear motor 524 to slide on the reaction vessel to press the cover body 523 on the mouth of the reaction vessel. Preferably, the elastic member 525 is set as a spring, and the elastic deformation of the spring generates a force on the cover body 523 to press the cover body 523 on the reaction vessel, so that the reaction vessel is better fixed on the reaction vessel bracket 522, and the cover body 523 is in elastic contact with the reaction vessel to prevent damage to the reaction vessel.

[0059] like Figure 7 As shown, the filtration unit 6 also includes a guide plate 601, which is connected to the liquid transport unit, and the filtration temperature control module is set to a constant temperature filter tank 602. The dumping mechanism 510 drives the reaction container to perform a dumping action to pour the reactants in the reaction container into the filter device 603 (funnel) in the constant temperature filter tank 602. The dilution and flushing mechanism 530 sprays water to flush the beaker, and the filtered liquid flows into the guide plate 601. At the same time, the liquid transport unit 4 transports the liquid in the guide plate 601 to the waste liquid bucket (not shown in the figure). When the liquid level in the filter device 603 drops, the clamping mechanism 110 in the grabbing unit 1 moves the reaction container and the filter device 603 back to the sample placement unit 2.

[0060] like Figure 1 and Figure 6As shown, the fully automatic free silica determination pretreatment device also includes a cleaning unit 7, which is installed on the sample placement unit 2. The cleaning unit 7 includes a nozzle 702 and a cleaning motor 701. The nozzle 702 is connected to the liquid transport unit. The nozzle 702 extends to the bottom of the reaction container placement rack 201 and above the filter device placement rack 202. The nozzle 702 is connected to the cleaning motor 701. The nozzle 702 is driven by the cleaning motor 701 to perform a circular motion to achieve 360-degree rotational spraying, thereby evenly flushing the reactants in the filter device.

[0061] Working principle:

[0062] The fully automatic free silica determination pretreatment device comprises a grabbing unit 1, a sample placement unit 2, a stirring and digestion unit 3, a liquid transport unit 4, a pouring and dilution unit 5, a filtering unit 6 and a cleaning unit 7. The sample placement unit 2 comprises a reaction vessel placement rack 201 and a filtering device placement rack 202. The reaction vessels containing the samples are placed in the reaction vessel placement rack 201 in sequence according to the serial number, and the filtering devices (funnels) containing the filter paper are placed in the filtering device placement rack 202 in sequence according to the serial number. The grabbing unit 1 moves the beaker to the stirring and digestion unit 3. The stirring and digestion unit 3 comprises a constant temperature heating module 310, a stirring module 320 and a lifting module 330. The liquid transport unit transports the phosphoric acid in the reagent bottle into the reaction vessel. The constant temperature heating module 310 is quickly heated to 245° C. to 250° C. At the same time, the lifting module 330 drives the stirring module 320 to descend and press the reaction vessel. The stirring module 320 The reactants in the reaction vessel are stirred. At this time, the grabbing unit 1 moves the filter device corresponding to the beaker number from the filter device placement rack 202 to the constant temperature filter tank 602. After the reaction in the stirring and digestion unit 3 is completed, the grabbing unit 1 moves the reaction vessel to the pouring and dilution unit 5. The pouring and dilution unit 5 includes a pouring mechanism 510, a reaction vessel fixing mechanism 520, and a dilution and flushing mechanism 530. The reaction vessel fixing mechanism 520 fixes the reaction vessel, and the pouring mechanism 510 drives the reaction vessel to perform a pouring action to pour the reactants in the reaction vessel into the filter device 603 in the constant temperature filter tank 602. The dilution and flushing mechanism 530 sprays water to flush the reaction vessel, and the filtered liquid flows into the guide plate 601. At the same time, the liquid transporting unit 4 transports the liquid in the guide plate 601 to the waste liquid bucket. After the liquid level in the filter device 603 drops, the grabbing unit 1 moves the reaction vessel and the filter device 603 back to the sample placement unit 2. The cleaning unit 7 is arranged above the filter device placement rack 202, and includes a cleaning motor 701 and a nozzle 702. The cleaning motor 701 drives the nozzle 702 to perform circular motion to evenly flush the reactants in the funnel until the filter paper in the filter device is cleaned to no acid reaction. The filter paper will eventually leave free silica. After the preliminary treatment of this design, the filter paper is used as a sample for subsequent processing and testing. The automated processing of the device makes it possible for the process of detecting the free silica content in the dust no longer requires manual operation by the experimenter, which reduces the difficulty of the experiment and improves the controllability and detection accuracy of the experimental process.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art can make some simple modifications, equivalent changes or modifications based on the technical content disclosed above, which fall within the scope of protection of the present invention.

Claims

1. A fully automatic free silicon dioxide determination pretreatment device, characterized in that: include A gripping unit, comprising a gripping mechanism for gripping or placing the reaction container and the filtration device; a sample placement unit, located on one side of the grabbing unit and used for placing a reaction container and a filtering device; A stirring and digestion unit is located on one side of the sample placement unit. The reaction vessel on the sample placement unit is moved into the stirring and digestion unit based on the clamping mechanism. The stirring and digestion unit includes a constant temperature heating module and a stirring module. The constant temperature heating module is located at the bottom of the stirring and digestion unit and performs heat transfer with the reaction vessel. The stirring module stirs the reactants in the reaction vessel. A pouring and diluting unit, located on one side of the grabbing unit, is used to dilute and rinse the reactants in the reaction container and pour the diluted reactants; A filtration unit, located on one side of the pouring and dilution unit, filters the reactants poured by the pouring and dilution unit, wherein the filtration unit includes a filtration temperature control module, and the filtration temperature control module is used to ensure that the reactants are filtered at a constant temperature; A liquid delivery unit, located on one side of the stirring and digestion unit, comprising a liquid delivery tube and a delivery pump, wherein the liquid delivery tube is connected to a reagent bottle and delivers the reagent in the reagent bottle to any one of the stirring and digestion unit, the pouring and dilution unit, and the filtration unit based on the delivery pump; The liquid delivery unit further includes a liquid heating device, which is used to heat or keep the liquid warm. The liquid transmission pipe includes a phosphoric acid pipe, a hydrochloric acid pipe, and a distilled water pipe.

2. The fully automatic free silica determination pretreatment device according to claim 1, characterized in that: The gripping mechanism includes a gripper, an X-axis linear motor, a Y-axis linear motor, a Z-axis linear motor, and a robotic arm connected to the gripper, and is used to grasp or place the reaction container and the filtration device; The robot arm moves laterally based on the X-axis linear motor, moves vertically based on the Y-axis linear motor, and moves longitudinally based on the Z-axis linear motor.

3. The fully automatic free silica determination pretreatment device according to claim 1, characterized in that: The sample placement unit includes a reaction vessel placement rack, a filter device placement rack, and a rotating motor. The reaction vessel placement rack and the filter device placement rack are coaxially arranged. The reaction vessel placement rack is located above the filter device placement rack. The rotating motor drives the reaction vessel placement rack and the filter device placement rack to rotate. The reaction container placement rack and the filter device placement rack are both configured as circular turntable structures.

4. The fully automatic free silica determination pretreatment device according to claim 1, characterized in that: The stirring and digestion unit further includes a lifting module, which is used to control the stirring module to move up and down along the axial direction of the stirring and digestion unit to stir the reactants in the reaction container.

5. The fully automatic free silica determination pretreatment device according to claim 4, characterized in that: The stirring module includes a graphite platen, a graphite grinding sheet, a stirring rod and a stirring motor. The graphite platen is connected to the lifting module, the graphite grinding sheet is installed in the graphite platen, and the stirring motor is installed above the graphite platen. One end of the stirring rod is connected to the stirring motor, and the other end extends downward through the graphite platen to stir the reactants in the reaction vessel.

6. The fully automatic free silica determination pretreatment device according to claim 1, characterized in that: The pouring and dilution unit includes a reaction container fixing mechanism, a pouring mechanism and a dilution and flushing mechanism. The reaction container fixing mechanism is connected to the pouring mechanism, and the bottom of the reaction container fixing mechanism is suspended in the air. The pouring mechanism controls the rotation and pouring of the reaction container in the reaction container fixing mechanism. The dilution and flushing mechanism is used to flush the reaction container in the reaction container fixing mechanism.

7. The fully automatic free silica determination pretreatment device according to claim 6, characterized in that: The reaction vessel fixing mechanism includes a fixing bracket, a reaction vessel holder, a cover, a linear motor, and an elastic member. One side of the reaction vessel holder is rotatably connected to the fixing bracket. The reaction vessel is fixed to the reaction vessel holder. The reaction vessel rotates along with the reaction vessel holder based on the control of the dumping mechanism. The cover is connected to the linear motor to slide along the axial direction of the fixing bracket. The top of the cover is provided with an elastic member. The cover body is configured as a semicircular structure.

8. The fully automatic free silica determination pretreatment device according to claim 1, characterized in that: The filtration unit further includes a guide plate, which is connected to the liquid transport unit; And / or the filtering temperature control module is configured as a constant temperature filtering tank.

9. The fully automatic free silica determination pretreatment device according to any one of claims 1 to 8, characterized in that: It also includes a cleaning unit, which is installed on the sample placement unit. The cleaning unit includes a nozzle and a cleaning motor. The nozzle is connected to the liquid transport unit and connected to the cleaning motor. The nozzle cleans the filter device by rotating and spraying driven by the cleaning motor.

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