Free silicon dioxide sample pretreatment equipment

Abstract

The utility model provides free silicon dioxide sample pretreatment equipment which comprises a base, two symmetrically arranged first vertical brackets are arranged on the base, and a heating and stirring device, a filtering device, a cooling device and a thermostat are arranged between the first vertical brackets; the inner sides of the two first vertical supports are fixedly connected with a liquid adding and pumping moving module and a filtering moving module respectively, the liquid adding and pumping moving module is provided with a liquid adding pipe, a liquid pumping pipe and a first temperature sensor through a first fixing frame, and the middle of the rear side of the first vertical support corresponding to the liquid adding and pumping moving module is connected with a second vertical support through a longitudinal support; a vertical moving module is fixedly connected to the inner side of the second vertical support, a longitudinal moving module is installed on the vertical moving module, the longitudinal moving module is fixedly connected with a tray, and a sample cup is installed in the tray; the liquid adding pipe is connected with the liquid injection peristaltic pump, the liquid injection peristaltic pump is connected with the two-position three-way valve, and the liquid pumping pipe is connected with the liquid pumping peristaltic pump; and the filtering moving module is provided with a filtering pipe through a second fixing frame.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of free silicon dioxide sample pretreatment equipment, and it is related to free silicon dioxide detection technical field. BACKGROUND

[0002] Multiple standards define the determination method and health standard of free silicon dioxide, for assessing the influence of dust in working environment on employee health, define the maximum allowable concentration of 50%~80% free silicon dioxide dust in workshop air, it is applicable to newly-built, reconstructed, expanded industrial enterprises, and the occasion of pollution hazard in existing industrial enterprises, emphasize the importance of taking effective measures to gradually achieve the specified health standard.

[0003] Prior art uses pyrophosphoric acid weight method to detect free silicon dioxide in air, but there are some operation problems, such as preparing pyrophosphoric acid needs to control temperature accurately for one and a half hours or even longer time, digestion process temperature reaches 250℃ high temperature and toxic gas is generated, there are scalding and poisoning hazards, and repeated cleaning and filtering steps are also needed, ashing and weighing, etc., the experimental process is lengthy, and the accuracy cannot be guaranteed, which is a great challenge to the skill level and physical and mental consumption of operators. The automation scheme is the only way to solve these problems, which is the fundamental reason for the market demand of automation equipment and the urgent need to meet.

[0004] The technical route of automatic control products on the market at present is to completely simulate the manual method operation, heating, stirring, temperature control, cooling, cleaning, filtering, etc. are completed according to the requirements of manual method in space dispersion and independent module, each module needs to completely simulate manual operation, which needs to solve the complex mechanical movement and control problem. There are the following technical problems: 1, many modules and space dispersion, resulting in many components, the overall equipment is large and heavy; 2, there are many mechanical parts, the safety factor is low, it is not easy to troubleshoot and repair, such as, heating container and filtering container are different, cup needs to be turned over and container needs to be changed during operation process; the container needs to be cleaned before cup is turned over, and the cleaning liquid needs to be transferred to new container; mechanical stirring module and temperature detection module are independent, and need to be cleaned independently after contacting solution, which consumes time; heating and filtering are in different space positions, and the moving mechanical structure of each position is complex; different position containers and fittings need complex cleaning system to realize structure complexity. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the purpose of the utility model is to provide a kind of free silicon dioxide sample pretreatment equipment, and the specific technical scheme is:

[0006] The application discloses a free silicon dioxide sample pretreatment device, which comprises a base, wherein two first vertical supports are symmetrically arranged on the base, a horizontal support is fixedly connected to the top of the first vertical supports, a heating stirring device and a filtering device are arranged between the two first vertical supports and are mounted on the base, a cooling device is arranged at the rear side of the heating stirring device, a thermostat is arranged at the rear side of the cooling device, a liquid adding and pumping moving module and a filtering moving module are respectively fixedly connected to the inner sides of the two first vertical supports, a liquid adding pipe, a pumping pipe and a first temperature sensor are mounted on the liquid adding and pumping moving module through a first fixing frame, the liquid adding pipe is arranged close to the first temperature sensor, a second vertical support is connected to the middle part of the rear side of the corresponding first vertical support of the liquid adding and pumping moving module through a longitudinal support, a vertical moving module is fixedly connected to the inner side of the second vertical support, a longitudinal moving module is mounted on the vertical moving module, a tray is fixedly connected to the longitudinal moving module, and a sample cup is mounted in the tray; the liquid adding pipe is connected with a liquid injection peristaltic pump, the liquid injection peristaltic pump is connected with a two-position three-way valve, three channels of the two-position three-way valve are respectively connected with a pyrophosphoric acid reagent container, a dilute hydrochloric acid reagent container and a pure water container, a thermostat is arranged on the pipeline connected with the pure water container of the two-position three-way valve, and the pumping pipe is connected with a pumping peristaltic pump; a filtering pipe is mounted on the filtering moving module through a second fixing frame, and the filtering pipe is connected with the other end of the pumping peristaltic pump.

[0007] Preferably, the heating stirring device comprises a heating support, a heating rod and a second temperature sensor, a heat insulation plate is mounted in the notch at the top of the heating support, a graphite heating groove is mounted in the inner groove of the heat insulation plate, and a placing groove corresponding to the sample cup is arranged in the middle part of the graphite heating groove; the heating rod and the second temperature sensor are arranged in the graphite heating groove by penetrating through the heat insulation plate; a stirring fixed support is arranged at the bottom of the heating support, a stirring motor is fixedly connected to the bottom of the stirring fixed support, a magnetic stirring head is fixedly connected to the output shaft of the stirring motor by penetrating through the stirring fixed support, and a magnetic rotor is arranged in the sample cup; the heating rod, the second temperature sensor and the stirring motor are connected with a PLC controller.

[0008] Further, the heating rod is arranged on both sides of the second temperature sensor.

[0009] Preferably, the cooling device comprises a cooling fixed support, a cooling opening is arranged in the middle part of the cooling fixed support, heat dissipation fins are mounted at the bottom of the cooling opening, the heat dissipation fins are wrapped with heat dissipation fans, and the heat dissipation fans are connected with the PLC controller.

[0010] Further, the heat dissipation fins extend into the cooling opening at the top and form a four-corner star-shaped opening.

[0011] Preferably, the filtering device comprises a filtering fixing support, a fixed seat is arranged on the bottom side of the middle part of the filtering fixing support, a bearing is arranged in the middle part of the fixed seat, the inner ring of the bearing is fixedly connected with a driven wheel, the driven wheel is connected with a driving wheel through a belt, the driving wheel is fixedly connected with the output shaft of a rotary motor arranged on the bottom of the filtering fixing support, a hopper is arranged in the driven wheel, the end of the hopper extends to the inner side of the filtering fixing support through the bearing, and a waste liquid cup is arranged below the hopper.

[0012] Further, electrode rods are arranged on the two sides of the filtering pipe, the electrode rods are located higher than the end of the filtering pipe, the electrode rods and the rotary motor are connected with a PLC controller, and the filtering pipe is arranged above the hopper.

[0013] Preferably, the thermostat comprises a heater, water inlets and outlets are arranged at the two ends of the heater respectively, a relay is arranged on the heater, the relay is used to be connected with a power supply and supply power for the heater, and a third temperature sensor is arranged close to the water outlet.

[0014] Further, the heater is in a cylindrical shape, a heating wire connected with the relay is arranged in the heater, and the relay and the third temperature sensor are connected with a PLC controller.

[0015] Preferably, the liquid adding and pumping moving module, the filtering moving module, the first temperature sensor, the longitudinal moving module, the liquid injection peristaltic pump, the two-position three-way valve and the liquid pumping peristaltic pump are connected with the PLC controller.

[0016] The utility model has the advantages of the following beneficial effects:

[0017] 1. High degree of integration: the heating and stirring modules are integrated together to realize multifunction of heating and stirring; the temperature detection, liquid adding pipe and liquid pumping pipe are integrated together to realize temperature control and liquid transfer sharing one mechanical arm, and the mechanical structure is simplified; the liquid injection peristaltic pump and the two-position three-way valve cooperate to realize addition of various solutions and emptying of solutions in the pipeline, and the pipeline design is simplified.

[0018] 2. Simplified cleaning system: magnetic stirring is adopted, the magnetic rotor is always in the sample cup and experiences all cleaning processes with the sample, and separate cleaning is not needed; the liquid adding pipe is close to the sidewall of the first temperature sensor, and the liquid injection realizes cleaning of the first temperature sensor, and no additional cleaning device is needed; the whole process of reaction, cleaning and filtering is completed in one cup, and there is no cup pouring operation, and no cup washing is needed; one liquid adding pipe and one liquid pumping pipe complete the contact reaction and accessory cleaning in the sample cup in the process of repeated liquid injection and pumping.

[0019] 3. Flexible and scalable operation: the heating and stirring device can be operated independently to facilitate the preparation of pyrophosphoric acid; multiple pretreatment devices can be arranged side by side according to the needs of the user, and each pretreatment device is operated independently according to the different conditions of the sample and is not affected by other sample processing processes, so that the same control can be expanded. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structure diagram of the free silicon dioxide sample pretreatment equipment of the utility model Figure 1 .

[0021] Figure 2 is a structure diagram of the free silicon dioxide sample pretreatment equipment of the utility model Figure 2 .

[0022] Figure 3 is a structure diagram of the liquid adding and extracting mobile module of the utility model.

[0023] Figure 4 is a structure diagram of the filtering mobile module of the utility model.

[0024] Figure 5 is a structure diagram of the heating and stirring device of the utility model.

[0025] Figure 6 is a structure diagram of the cooling device of the utility model Figure 1 .

[0026] Figure 7 is a structure diagram of the cooling device of the utility model Figure 2 .

[0027] Figure 8 is a structure diagram of the filtering device of the utility model.

[0028] Figure 9 is a structure diagram of the filtering device of the utility model.

[0029] Figure 10 is a structure diagram of the thermostat of the utility model.

[0030] In the figure: 1, base; 2, first vertical support; 3, horizontal support; 4, heating and stirring device; 401, heating support; 402, heating rod; 403, second temperature sensor; 404, heat insulation plate; 405, graphite heating groove; 406, placing groove; 407, stirring fixed support; 408, stirring motor; 409, magnetic stirring head; 5, filtering device; 501, filtering fixed support; 502, fixed seat; 503, bearing; 504, driven wheel; 505, belt; 506, driving wheel; 507, rotary motor; 508, hopper; 509, waste liquid cup; 6, cooling device; 601, cooling fixed support; 602, cooling opening; 603, heat sink; 604, cooling fan; 7, thermostat; 701, heater; 702, water inlet; 703, water outlet; 704, relay; 705, third temperature sensor; 8, liquid adding and pumping moving module; 9, filtering moving module; 10, first fixed frame; 11, liquid adding pipe; 12, liquid pumping pipe; 13, first temperature sensor; 14, longitudinal support; 15, second vertical support; 16, vertical moving module; 17, longitudinal moving module; 18, tray; 19, sample cup; 20, second fixed frame; 21, filtering pipe; 22, electrode rod. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] As Figures 1-10As shown, a free silicon dioxide sample pretreatment device includes a base 1, the base 1 is provided with two symmetrical first vertical supports 2, the top of the first vertical support 2 is fixedly connected with a horizontal support 3, a heating and stirring device 4 and a filtering device 5 are arranged between the two first vertical supports 2 and are mounted on the base 1, a cooling device 6 is arranged at the rear side of the heating and stirring device 4, and a thermostat 7 is arranged at the rear side of the cooling device 6; the heating and stirring device 4 is used to heat and stir the sample in the sample cup 19, the filtering device 5 is used to filter the sample in the sample cup 19, the cooling device 6 is used to cool the sample in the sample cup 19, and the thermostat 7 is used to ensure that the distilled water added into the sample cup 19 is in a constant temperature state. The inner sides of the two first vertical supports 2 are respectively fixedly connected with a liquid adding and pumping moving module 8 and a filtering moving module 9, the liquid adding and pumping moving module 8 is provided with a liquid adding pipe 11, a liquid pumping pipe 12 and a first temperature sensor 13 through a first fixing frame 10, the liquid adding pipe 11 is arranged close to the first temperature sensor 13, the first temperature sensor 13 is used to monitor the temperature of the solution in the sample cup 19, the rear side of the corresponding first vertical support 2 of the liquid adding and pumping moving module 8 is connected with a second vertical support 15 through a longitudinal support 14 in the middle, the inner side of the second vertical support 15 is fixedly connected with a vertical moving module 16, a longitudinal moving module 17 is mounted on the vertical moving module 16, the longitudinal moving module 17 is fixedly connected with a tray 18, the tray 18 is provided with a sample cup 19, the sample cup 19 is a straight wall glass cup with a cup opening flange and a flat bottom, the tray 18 is provided with a circular hole with the same diameter as the outer diameter of the sample cup 19, the flange of the sample cup 19 can slide up and down on the hole of the tray 19, the flange can be clamped in the circular hole to prevent the sample cup 19 from falling off and play a fixing role; the liquid adding pipe 11 is connected with a liquid injection peristaltic pump, the liquid injection peristaltic pump is connected with a two-position three-way valve, the three channels of the two-position three-way valve are respectively connected with a pyrophosphoric acid reagent container, a dilute hydrochloric acid reagent container and a pure water container arranged in a mounting table, a thermostat 7 is arranged on the pipeline connected with the pure water container of the two-position three-way valve, the thermostat 7 is a instant heater, the pure water flowing through the thermostat 7 changes from normal temperature to hot water with a temperature of 50-80℃, and the liquid pumping pipe 12 is connected with a liquid pumping peristaltic pump; the filtering moving module 9 is provided with a filtering pipe 21 through a second fixing frame 20, and the filtering pipe 21 is connected with the other end of the liquid pumping peristaltic pump. The liquid injection peristaltic pump is used to inject pyrophosphoric acid reagent, dilute hydrochloric acid reagent or pure water into the sample cup 19. The liquid pumping peristaltic pump pumps out the solution in the sample cup 19 from the liquid pumping pipe 12, and the solution is discharged into a funnel 508 provided with filter paper through the filtering pipe 21 for filtration. The liquid injection peristaltic pump and the two-position three-way valve cooperate to realize the addition of various solutions and the emptying of the solution in the pipeline, and simplify the pipeline design.

[0033] The liquid adding and pumping moving module 8, the filtering moving module 9, the first temperature sensor 13, the longitudinal moving module 17, the liquid injection peristaltic pump, the two-position three-way valve and the pumping peristaltic pump are connected with the PLC controller. The PLC controller is connected with the upper computer, the operation of each module is controlled through the upper computer, and the data state is displayed. The equipment is arranged in a separate semi-closed chamber, the chamber wall is provided with an exhaust hole connected with the outside, an exhaust fan is arranged in the hole, and the exhaust fan is connected with the PLC controller. The temperature detection, the liquid adding pipe 11 and the pumping pipe 12 are integrated together, the temperature control and the liquid transfer share one mechanical arm, and the mechanical structure is simplified.

[0034] Specifically, the vertical moving module 16 drives the longitudinal moving module 17 to move in the vertical direction, the longitudinal moving module 17 drives the tray 18 to move in the horizontal direction, the vertical moving module 16 and the longitudinal moving module 17 form a mechanical arm, and the position of the sample cup 19 is conveniently transferred. The liquid adding and pumping moving module 8 drives the first fixing frame 10 to move in the vertical direction, and then drives the liquid adding pipe 11, the first temperature sensor 13 and the pumping pipe 12 to extend into the sample cup 19. The filtering moving module 9 drives the second fixing frame 20 to move in the vertical direction, and then drives the filtering pipe 21 to adjust the position up and down, so that the filtering pipe 21 can extend into the funnel 508, and the filtering process is conveniently performed.

[0035] As shown in Figure 5 The heating and stirring device 4 includes a heating support 401, a heating rod 402 and a second temperature sensor 403, a heat insulation plate 404 is arranged in the top notch of the heating support 401, a graphite heating groove 405 is arranged in the inner recess of the heat insulation plate 404, and a placing groove 406 corresponding to the sample cup 19 is arranged in the middle of the graphite heating groove 405; the heating rod 402 and the second temperature sensor 403 extend into the graphite heating groove 405 through the heat insulation plate 404, and the heating rod 402 is arranged on both sides of the second temperature sensor 403; a stirring fixing support 407 is arranged at the bottom of the heating support 401, a stirring motor 408 is fixedly connected to the bottom of the stirring fixing support 407, a magnetic stirring head 409 is fixedly connected to the output shaft of the stirring motor 408 through the stirring fixing support 407, and a magnetic rotor is arranged in the sample cup 19; the heating rod 402, the second temperature sensor 403 and the stirring motor 408 are connected with the PLC controller. The heat insulation plate 404 isolates the graphite heating groove 405 from the magnetic stirring head 409 below, prevents the high temperature of the graphite heating groove 405 above from damaging the magnetic stirring head 409 and affecting the magnetic field. The stirring motor 408 generates a stable vortex magnetic field after being electrified, drives the magnetic rotor in the sample cup 19 to rotate, realizes the stirring effect, and is connected with the power supply and the speed regulating module and controlled through the PLC controller. The magnetic rotor is coated with glass material to avoid corrosion and affect the service life. The heating and stirring modules are integrated together to realize the multifunction of heating and stirring.

[0036] As shown in Figure 6 and 7 cooling device 6 includes a cooling fixed bracket 601, the cooling fixed bracket 601 is provided with a cooling opening 602 in the middle, the cooling opening 602 is provided with a cooling fin 603 at the bottom, the cooling fin 603 is wrapped with a cooling fan 604, and the cooling fan 604 is connected with the PLC controller. The top of the cooling fin 603 extends into the cooling opening 602 and forms a four-corner star-shaped opening. After the sample cup 19 is heated and stirred, the sample cup 19 can be moved into the cooling opening 602 of the cooling device 6 by cooperating the longitudinal moving module 17 and the vertical moving module 16, and the cooling fan 604 is started to cool the solution in the sample cup 19 to the required temperature for a certain period of time.

[0037] As shown in Figure 8 and 9 filtering device 5 includes a filtering fixed bracket 501, a fixed seat 502 is mounted on the bottom side of the middle of the filtering fixed bracket 501, a bearing 503 is mounted in the middle of the fixed seat 502, the inner ring of the bearing 503 is fixedly connected with a driven wheel 504, the driven wheel 504 is connected with a driving wheel 506 through a belt 505, the driving wheel 506 is fixedly connected with the output shaft of a rotary motor 507 mounted on the bottom of the filtering fixed bracket 501, a hopper 508 is mounted in the driven wheel 504, the end of the hopper 508 extends to the inside of the filtering fixed bracket 501 through the bearing 503, and a waste liquid cup 509 is placed below the hopper 508. The rotary motor 507 drives the hopper 508 to rotate at a fixed speed, and the filtering effect is better when the filter paper is placed in the hopper 508 for filtering.

[0038] The filtering pipe 21 is provided with electrode rods 22 on both sides, the electrode rods 22 are located higher than the end of the filtering pipe 21, the electrode rods 22 and the rotary motor 507 are connected with the PLC controller, and the filtering pipe 21 is arranged above the hopper 508. The electrode rods 22 are capacitive electrode rods, which are used to monitor the liquid level in the hopper 508.

[0039] As shown in Figure 10 The thermostat 7 includes a heater 701, the heater 701 is provided with a water inlet 702 and a water outlet 703 at both ends respectively, a relay 704 is arranged on the heater 701, the relay 704 is used to be connected with the power supply and supply power to the heater 701, and a third temperature sensor 705 is arranged near the water outlet 703. The heater 701 is in a cylindrical shape, a heating wire connected with the relay 704 is arranged in the heater 701, and the relay 704 and the third temperature sensor 705 are connected with the PLC controller. The third temperature sensor 705 is used to feedback the water outlet temperature of the thermostat 7, and the PLC controller controls the heater 701 to control the temperature.

[0040] The working process of the utility model is:

[0041] 1. Place sample: move tray 18 to sample site through vertical moving module 16 and longitudinal moving module 17, place sample cup 19 with built-in magnetic rotor in tray 18, and pour dust sample into sample cup 19; the dust sample is obtained from filter paper in the sampler and is treated by sulfur removal, carbon removal and the like;

[0042] 2. Add pyrophosphoric acid: move sample cup 19 to placing groove 406 of graphite heating groove 405 of heating and stirring device 4 through vertical moving module 16 and longitudinal moving module 17, drive first fixed frame 10 to move downward by liquid adding and pumping moving module 8, control two-position three-way valve to conduct pyrophosphoric acid adding channel, start liquid injection peristaltic pump to rotate forward, add quantitative pyrophosphoric acid solution into sample cup 19, then control liquid injection peristaltic pump to rotate reversely, and empty pyrophosphoric acid solution in the pipeline;

[0043] 3. Digestion reaction: start heating and stirring device 4, so that the solution in sample cup 19 reacts for a certain time at a set temperature, complete digestion, and at the same time, start exhaust fan to exhaust harmful gas;

[0044] 4. Cool sample: move first fixed frame 10 upward, move sample cup 19 to cooling opening 602 of cooling device 6 through vertical moving module 16 and longitudinal moving module 17, start cooling fan 604, so that the solution in sample cup 19 reaches the required temperature;

[0045] 5. Add heated distilled water: move sample cup 19 to placing groove 406 of stirring and heating device 4 again through vertical moving module 16 and longitudinal moving module 17, move first fixed frame 10 downward through liquid adding and pumping moving module 8, control two-position three-way valve to conduct pure water adding channel, start thermostat 7 and liquid injection peristaltic pump, control liquid injection peristaltic pump to rotate forward, and at the same time, start stirring motor 408, add quantitative pure water into sample cup 19, then control liquid injection peristaltic pump to rotate reversely, and empty pure water in the pipeline;

[0046] 6. Heat and boil: start heating and stirring device 4, heat graphite heating groove 405, so that the solution in sample cup 19 reacts for a certain time at a set temperature, complete boiling, and at the same time, exhaust fan continuously exhausts harmful gas;

[0047] 7. Filtering: Put filter paper in the funnel 508, start the rotary motor 507 and the suction peristaltic pump, the solution in the sample cup 19 is guided into the funnel 508 through the suction peristaltic pump from the suction tube 12 through the filter tube 21, the liquid level in the funnel 508 is monitored through the electrode rod 22, and the operation rhythm of the suction peristaltic pump is feedback controlled to improve the filtering efficiency, the liquid level is fed back to the host computer through the electrode rod 22, and the host computer can issue a filtering end reminder until the solution in the sample cup 19 is completely filtered out;

[0048] 8. Washing and filtering: control the two-position three-way valve to guide the dilute hydrochloric acid adding channel, start the liquid injection peristaltic pump to rotate, add a certain amount of dilute hydrochloric acid into the sample cup 19, and then run step 7; control the two-position three-way valve to guide the pure water adding channel, control the liquid injection peristaltic pump to rotate, and start the stirring motor 408 at the same time, add a certain amount of pure water into the sample cup 19, flush the first temperature sensor 13 during the adding process, then run step 7 until the liquid in the sample cup 19 is completely filtered out;

[0049] 9. Resetting: the liquid adding and suction moving module 8 drives the first fixed frame 10 to move upwards, the vertical moving module 16 and the longitudinal moving module 17 drive the tray 18 to move to the sample position, the filtering moving module 9 drives the second fixed frame 20 to move upwards, and the filter paper with filter residue in the funnel 508 is taken out.

[0050] The filter paper with filter residue is placed in a muffle furnace for ashing treatment to form silicon dioxide solids, and the weight of the sample added into the sample cup 19 is compared to obtain the silicon dioxide content in the sample. The utility model can also be used to prepare pyrophosphoric acid alone, the sample cup 19 is moved to the placing groove 406 of the stirring and heating device 4 through the vertical moving module 16 and the longitudinal moving module 17, the phosphoric acid stock solution is injected into the sample cup 19, the heating and stirring device 4 is started, and pyrophosphoric acid can be prepared after a certain time of heating and stirring, and the preparation process is simple and reliable; after the preparation of pyrophosphoric acid is completed, the pyrophosphoric acid can be used to configure a pyrophosphoric acid solution and stored in a pyrophosphoric acid reagent container. Users can set multiple pretreatment devices according to needs, each pretreatment device is independently operated according to different conditions of samples, is not affected by other sample treatment processes, and expansion of the same control is realized.

[0051] The utility model discloses use few mechanical parts, abandon a large number of mechanical construction, reduce failure rate, the degree of integration is high, save space, through the system log record of host computer running process and running state, abnormal state alarm and quick positioning fault. Adopt magnetic force stirring, and magnetic force rotor is always in sample cup, with sample experiences all washing process, need not separate washing, liquid adding pipe 11 is close to first temperature sensor 13 side wall, and the washing of first temperature sensor 13 is realized to liquid injection simultaneously, need not add washing device additionally, always complete reaction, washing, filter all process in a cup, there is no cup operation, do not involve washing cup, a liquid adding pipe 11 and a liquid pumping pipe 12, in the process of liquid injection and liquid pumping repeated operation, complete contact reaction and accessory washing in sample cup 19.

[0052] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A free silica sample pre-treatment apparatus, characterized by, The base is provided with two symmetrical first vertical supports, the top of the first vertical support is fixedly connected with a transverse support, a heating and stirring device and a filtering device are arranged between the two first vertical supports, a cooling device is arranged at the rear side of the heating and stirring device, and a thermostat is arranged at the rear side of the cooling device; a liquid adding and pumping moving module and a filtering moving module are respectively fixedly connected to the inner sides of the two first vertical supports, the liquid adding and pumping moving module is provided with a liquid adding pipe, a liquid pumping pipe and a first temperature sensor through a first fixing frame, the liquid adding pipe is arranged close to the first temperature sensor, a second vertical support is connected to the middle of the rear side of the corresponding first vertical support of the liquid adding and pumping moving module through a longitudinal support, a vertical moving module is fixedly connected to the inner side of the second vertical support, a longitudinal moving module is arranged on the vertical moving module, a tray is fixedly connected to the longitudinal moving module, and a sample cup is arranged in the tray; the liquid adding pipe is connected with a liquid injection peristaltic pump, the liquid injection peristaltic pump is connected with a two-position three-way valve, the three channels of the two-position three-way valve are respectively connected with a pyrophosphoric acid reagent container, a dilute hydrochloric acid reagent container and a pure water container, a thermostat is arranged on the pipeline connected with the pure water container of the two-position three-way valve, and the liquid pumping pipe is connected with a liquid pumping peristaltic pump; the filtering moving module is provided with a filtering pipe through a second fixing frame, and the filtering pipe is connected with the other end of the liquid pumping peristaltic pump.

2. A free silica sample pre-treatment apparatus according to claim 1, characterised in that, The heating and stirring device comprises a heating support, a heating rod and a second temperature sensor, a heat insulation plate is arranged in the top notch of the heating support, a graphite heating groove is arranged in the inner recess of the heat insulation plate, and a placing groove corresponding to the sample cup is arranged in the middle of the graphite heating groove; the heating rod and the second temperature sensor are arranged in the graphite heating groove through the heat insulation plate; the bottom of the heating support is provided with a stirring fixed support, a stirring motor is fixedly connected to the bottom of the stirring fixed support, a magnetic stirring head is fixedly connected to the output shaft of the stirring motor through the stirring fixed support, and a magnetic rotor is arranged in the sample cup; the heating rod, the second temperature sensor and the stirring motor are connected with a PLC controller.

3. A free silica sample pre-treatment apparatus according to claim 2, characterised in that, The heating rod is arranged on both sides of the second temperature sensor.

4. A free silica sample pre-treatment apparatus according to claim 1, wherein The cooling device comprises a cooling fixed support, a cooling opening is arranged in the middle of the cooling fixed support, heat dissipation fins are arranged at the bottom of the cooling opening, the heat dissipation fins are wrapped with a heat dissipation fan, and the heat dissipation fan is connected with the PLC controller.

5. A free silica sample pre-treatment apparatus according to claim 4, characterised in that, The heat dissipation fins extend to the inside of the cooling opening and form a four-star-shaped opening.

6. A free silica sample pre-treatment apparatus according to claim 1, wherein The filtering device comprises a filtering fixed support, a fixed seat is arranged at the bottom side of the middle of the filtering fixed support, a bearing is arranged in the middle of the fixed seat, the inner ring of the bearing is fixedly connected with a driven wheel, the driven wheel is connected with a driving wheel through a belt, the driving wheel is fixedly connected with the output shaft of a rotating motor arranged at the bottom of the filtering fixed support, a funnel is arranged in the driven wheel, the funnel extends to the inner side of the filtering fixed support through the bearing, and a waste liquid cup is arranged below the funnel.

7. A free silica sample pre-treatment apparatus according to claim 6, characterised in that, Electrode rods are arranged on both sides of the filtering pipe, the electrode rods are arranged higher than the end of the filtering pipe, the electrode rods and the rotating motor are connected with the PLC controller, and the filtering pipe is arranged above the funnel.

8. A free silica sample pre-treatment apparatus according to claim 1, wherein The thermostat comprises a heater, water inlets and outlets are arranged at two ends of the heater respectively, a relay is arranged on the heater, the relay is connected with a power supply and supplies power for the heater, and a third temperature sensor is arranged near the water outlet.

9. A free silica sample pre-treatment device according to claim 8, characterised in that, The heater is in a cylindrical shape, a heating wire connected with the relay is arranged in the heater, and the relay and the third temperature sensor are connected with a PLC controller.

10. A free silica sample pre-treatment apparatus according to claim 1, wherein The liquid adding and pumping moving module, the filtering moving module, the first temperature sensor, the longitudinal moving module, the liquid injection peristaltic pump, the two-position three-way valve and the liquid pumping peristaltic pump are connected with the PLC controller.

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