CN104128217B - The quantitative quick filling machine of titrating solution - Google Patents
The quantitative quick filling machine of titrating solution Download PDFInfo
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- CN104128217B CN104128217B CN201410334978.1A CN201410334978A CN104128217B CN 104128217 B CN104128217 B CN 104128217B CN 201410334978 A CN201410334978 A CN 201410334978A CN 104128217 B CN104128217 B CN 104128217B
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Abstract
The quantitative quick filling machine of a kind of titrating solution, comprise electrical equipment, programme-control and container, it is characterized in that reagent bottle is by tubes connection test solution suction mouth, the lower non-return valve arranged in pipeline is connected with three-way pipe lower end, the middle port of three-way pipe is connected with constant volume device entrance end, upper end is connected with the test solution port of export by upper non-return valve, and the turning cylinder of DC servo motor and piston are mechanically connected by axle connected device; At the photoinduction switch that the test solution port of export is installed, single-chip microcomputer, led charactron, input rotary switch, acousto-optical prompting device are connected with the power line of DC servo motor and the holding wire of encoder; Program discharges the diameter of test solution numerical value, constant volume device piston according to each extraction of setting and equivalent, calculates the rotating cycle of DC servo motor; After test solution flows out and makes photoinduction switch triggering, with the piston reciprocates of seasonal electric machine rotation, constant volume device; Present device adds power and discharges, and overcomes the shortcoming that flow rate of liquid is slow, saves time, and improves conventional efficient, reduces test solution waste and reduce environmental pollution.
Description
Technical field
The invention belongs to teaching aid, relate to chemical experiment teaching facility, the quantitative quick filling machine of a kind of titrating solution, by the separatory machinery of titrimetry perfusion in buret.
Background technology
Facility in traditional chemical analysis titration experiments: test solution and standard liquid, with reagent bottle or tubualted bottle storage, the test solution be stored in reagent bottle relies on liquid level difference to inject buret by catheter; The test solution be stored in tubualted bottle is also rely on liquid level difference naturally to inject buret, and therefore, reagent bottle all must be arranged on eminence by conventional facilities, there is gesture potential difference with liquid outlet.Getting in liquid process because of reasons such as catheter bad sealing or misoperations, often occurring spattering outside test solution on ground or operating desk, causing corrosivity to pollute.Due to the set-up mode of above two kinds of upper and lower mouths of reagent bottle, standard liquid is all rely on liquid level difference to flow in buret, get the time of liquid process with regard to necessary at substantial, particularly in large-scale teaching and examination, in the same time period, experiment number is many, and the people that the later stage gets standard liquid wants the time of large losses for waiting for, has tied up experimental period, artificial achievement difference must be caused, have a strong impact on quality of instruction judge and the fair inspection to student.The reagent bottle of stock standard solution or tubualted bottle must be positioned over eminence in addition, carrying and get liquid process in certainly exist certain danger.
Summary of the invention
The object of this invention is to provide the quantitative quick filling machine of a kind of titrating solution, precisely, test solution is exported fast, experimental implementation efficiency can be improved, solve the subject matter of puzzlement quality of instruction, solve again the safety problem of facility, and reduce standard liquid waste and reduce environmental pollution.
The quantitative quick filling machine of titrating solution of the present invention, comprise electrical control part, program controls portions and electrical appliance kit and container facility, it is characterized in that reagent bottle is on ground, by tubes connection test solution suction mouth, test solution suction mouth is connected with three-way pipe lower end by the lower non-return valve arranged in pipeline, the middle port of three-way pipe is connected with constant volume device entrance end, upper end is connected with the test solution port of export by upper non-return valve, and with middle port at same vertical plane, the turning cylinder of DC servo motor and piston are mechanically connected by axle connected device; Electrical appliance part: the photoinduction switch installed at the test solution port of export, single-chip microcomputer, led charactron, input rotary switch, acousto-optical prompting device is had in electrical appliance kit, integral installation on a printed-wiring board, and is connected by the holding wire of wire with the power line of DC servo motor and the encoder of afterbody; Program controls portions: rotate the input value 1-55mL that the input knob on electrical appliance kit sets to single-chip microcomputer, and this numerical value is presented on led charactron, job control program in single-chip microcomputer obtain start DC servo motor drive signal, make servomotor promote constant volume device, DC servo motor rotates forward the suction amount driving piston to complete test solution, the test solution of reagent bottle is pumped in constant volume device by conduit, and simultaneously encoder condition feedback that DC servo motor is driven is to single-chip microcomputer control program; When the DC servo motor rotating cycle calculated is equal with the numerical value of DC servo motor rotary encoder, DC servo motor stops rotation forward or backwards, rotate in the opposite direction afterwards, the test solution equivalent extracted is discharged, and make the photoinduction switch of the test solution port of export send signal, often move back and forth once, namely DC servo motor stops, and completes and once gets test solution process; When again producing the signal of acousto-optical prompting device and photoinduction switch, being namely the instruction starting again DC servo motor, carrying out reciprocating motion next time.
Advantage of the present invention: this equipment is by the distribution apparatus of standard liquid when many people test simultaneously, there is separatory speed fast, point liquid measure is consistent, the feature of ne-leakage, start servomotor by test solution outlet inductive switch and standard liquid is injected buret, improve conventional efficient, reduce test solution waste and reduce environmental pollution, the many person-times of skill examination requirements with amount experimental implementation can be met.Rely in liquid level official post test solution inflow buret to overcome conventional method, the reagent bottle of storage test solution or tubualted bottle need place the high-order deficiency existed, and this machine increases power and is extracted into by standard liquid in the double temporary container of constant volume device.Like this, the reagent bottle of storage test solution can be positioned over the position of ground or any distance, is connected with bottler placer by connecting tube, relies on the reciprocating motion of constant volume device piston to be flow in buret by test solution.Handle encoder for servo motor by control program simultaneously, the specification of experimentally vessel can determine the standard liquid amount at every turn injecting buret, and by the switch activated motor of photoinduction of perfusion outlet, the induced signal produced after each perfusion completes is the electric motor starting order of again pouring into discharge, compare with conventional method to decrease and need close apolipsis liquid valve, avoid test solution excessive, save time, and add power to discharge, overcome the shortcoming that flow rate of liquid is slow, thus improve conventional efficient, the waste of minimizing test solution and reduce environmental pollution.
It is 1-55mL that this equipment arranges selectable range, because the capacity of the buret that laboratory is commonly used is 25mL and 50mL two kinds, should more than this capability value when taking titrand, namely 30mL or 55mL is got, manually adjust the cock of buret by operator again or the intraluminal fluid scale of construction is accurate to 25mL or 50mL by extruding glass marble, then carry out titration operation.Other range value is in order to the machine can be used for the purposes that inaccuracy gets liquid.
Accompanying drawing explanation
Fig. 1 is titrating solution quantitative quick filling machine structural representation;
Fig. 2 a is the electric control box housing front view of Fig. 1 bottler placer;
Fig. 2 b is the electric control box housing rearview of Fig. 1 bottler placer;
Fig. 3 is the electrical equipment theory diagram of described bottler placer;
Fig. 4 is electrical part connection diagram;
Fig. 5 is the single-chip microcomputer control program schematic diagram of described bottler placer.
Detailed description of the invention
The quantitative quick filling machine of titrating solution, comprise electrical appliance part, control program part and electrical appliance kit and container facility, see Fig. 1, it is characterized in that being communicated with test solution suction mouth 1 in the test solution bottles of ground or low level by conduit, test solution suction mouth 1 is connected with three-way pipe 3 lower end by the lower non-return valve 2 arranged in pipeline, the middle port of three-way pipe 3 is connected with constant volume device 9 entrance end, upper end exports 4 through upper non-return valve 2` with test solution and is connected, and with the middle port of three-way pipe 3 at same vertical plane, turning cylinder and the piston 8 of DC servo motor 7 are mechanically connected by axle connected device.The electrical part of described electrical control part is shown in Fig. 2 a, 2b, and there are rotation input switch, power switch, 2 LED charactrons in electrical appliance kit front.Servomotor output socket, servo motor encoder input port, power input jack is had after electrical appliance kit.Have wiring board in electrical appliance kit, very little single-chip microcomputer and led charactron, rotate input switch, acousto-optical prompting device 5 integral installation on a printed-wiring board, each electrical part is connected with the holding wire of the power line of DC servo motor 7 and the encoder 6 of afterbody.Acousto-optical prompting device 5 exposition is arranged on test solution and exports 4 places.
Control program is had in single-chip microcomputer, see Fig. 3, power supply connects all electrical parts, and rotate input switch and send into control program to the signal of the control program of single-chip microcomputer internal memory input numerical value, liquid outlet photoinduction switch, the state of a control of single-chip microcomputer is shown by LED charactron, acousto-optical prompting device, job control program in single-chip microcomputer discharges test solution numerical value according to each extraction of setting and equivalent, in conjunction with the diameter of constant volume device piston, calculates the rotating cycle of DC servo motor, after job instruction makes the action of photoinduction switch triggering, rotate with seasonal DC servo motor, drive the piston reciprocates of constant volume device, the number of turns that DC servo motor has rotated feeds back to single-chip microcomputer by the hair braider of DC servo-motor, when the DC servo motor rotating cycle calculated is equal with the numerical value of DC servo motor rotary encoder, DC servo motor stops rotation forward or backwards, DC servo motor rotates forward the suction amount driving piston to complete test solution, the test solution of reagent bottle is pumped in constant volume device by conduit, rotate in the opposite direction afterwards, the test solution equivalent extracted is discharged, test solution makes the photoinduction switch of the test solution port of export send signal when discharging, often move back and forth once, namely DC servo motor stops, complete and once get test solution process, when again producing the signal of acousto-optical prompting device and photoinduction switch, being namely the instruction starting again DC servo motor, carrying out reciprocating motion next time.
Electrical appliance part, see Fig. 4: power supply selects finished product Switching Power Supply, specification is 5V/1A, 12V/3A.Rotation input switch S1 in parallel between 5V positive source, earthing pole, by the pin 12 of wire access single-chip microcomputer U1, counts for input quantity.Counting pull-up resistor R1 and single-chip microcomputer U1 pin 12 with rotate input switch S1 and be connected.The liquid outlet photoinduction switch S 2 being arranged on liquid outlet 2 place is connected to the pin 13 of single-chip microcomputer U1 by wire, for starting the quantitative quick filling machine of titrating solution.Fluid pull-up resistor R2 is connected by cable with liquid outlet photoinduction switch S 2 with the pin 13 of single-chip microcomputer U1.Replacement resistance R3 in parallel between 5V positive source, earthing pole is connected with the pin 9 of single-chip microcomputer U1 with replacement electric capacity C3, has carried out the reset of single-chip microcomputer U1.The B1--B8 end that the abcdefg section of 2 common anode LED charactrons DPY1, DPY2 is connected to respectively and drives integrated package U3, drive integrated package U2; The A1--A8 of integrated package U3, U2 end is driven to be connected to the P00---P07 end of single-chip microcomputer U1 by bus; The pin 1 of integrated package U2 is driven to be connected to the pin 24 of single-chip microcomputer U1; 1 pin of integrated package U3 is driven to be connected to 25 pin of single-chip microcomputer U1; The pin 3,8 of 2 common anode LED charactrons DPY1, DPY2 accesses one end of respective current-limiting resistance R7, R8 respectively, the other end access 5V positive source of current-limiting resistance R7, resistance R8; The pin 23 of single-chip microcomputer U1 is by current-limiting resistance R4 connecting triode Q1; Triode Q1 colelctor electrode drives buzzer LS1 and LED D1 to complete the function of acousto-optical prompting device 6; Buzzer one end of acousto-optical prompting device 6 is connected with one end of prompting resistance R5 and accesses 5V positive source in the lump, the colelctor electrode of another termination triode Q1, the anode of another termination LED D1 of prompting resistance R5, the negative electrode of LED D1 connects the colelctor electrode of triode Q1, the grounded emitter of triode Q1; DC servo motor drives the pin 5,6 of integrated package U4 to be connected to the pin 21,22 of single-chip microcomputer U1 respectively, controls rotating and reverse of DC servo motor respectively; One end that DC servo motor drives pin 1 ground connection of integrated package U4, pin 2 connects DC servo motor, another termination motor of DC servo motor drives the pin 10 of integrated package U4; Motor drives the pin 3 of integrated package U4 to connect one end of shunt capacitance C4, the other end ground connection of feed-through capacitor C4; Motor drives the pin 9 of integrated package U4 to connect one end of shunt capacitance C5, the other end ground connection of feed-through capacitor C5; The negative electrode of Zener diode D2 connects the pin 4 that motor drives integrated package U4, plus earth; Motor drives the pin 7 of integrated package U4 to be connected to 12V positive source; One end of motor current-limiting resistance R6 is connected to 12V positive source, and the other end of motor current-limiting resistance R6 is connected to the pin 8 that motor drives integrated package U4; The signal stitch 1--8 of DC servo motor 7 afterbody encoder is connected to the P10--P17 terminal of single-chip microcomputer U1 by cable, complete the detection of rotating cycle to DC servo motor and direction of rotation.Two pin of crystal oscillator X1 are connected to pin 18 and the pin 19 of single-chip microcomputer U1 respectively, and a pin of starting of oscillation electric capacity C1 and starting of oscillation electric capacity C2 connects a pin of crystal oscillator X1, another pin power-respectively.
Described constant volume device 9 is made up of liquid storage cylinder, piston and liquid in-out connecting tube, and material is polytetrafluoroethylplastic plastic.Storage cylinder bore is " piston diameter " in input control program, and storage cylinder, piston space reach no liquid seepage precision.
Job control program is see Fig. 5: the control program of single-chip microcomputer internal memory is according to the umber of pulse rotating input switch input numerical value, determine each draw standard solution numerical value, the minimum supply of standard liquid is 1mL, maximum 55mL, and this input numerical value is presented on led charactron, correctly then press acknowledgement key.If now liquid outlet inductive switch is triggered, job control program in single-chip microcomputer gets liquid measure numerical value, diameter in conjunction with constant volume device 9 piston according to input, calculate the rotating cycle of DC servo motor 7, conveying instruction is to the encoder 6 of DC servo-motor 7, DC servo-motor 7 drives the piston reciprocates of constant volume device, then through the encoder feedback of DC servo-motor afterbody to single-chip microcomputer; DC servo motor 7 rotates forward and drives piston 8 to make the standard liquid of input quantity one-way flow in surely molten device 9, when the piston 8 that DC servo motor 7 rotates forward drive constant volume device 9 extracts the standard liquid in test solution bottles, the lower non-return valve 4 be connected with test solution entrance 1 is opened because of suction function, exports the 4 upper non-return valves 3 be connected because of own wt and suction function to close with test solution simultaneously; Reversely rotate when being pumped into DC servo motor 7 when the standard liquid in constant volume device reaches set amount, the test solution outlet 4 of the standard liquid equivalent extracted to upper end is discharged.Reversely rotate with to rotate forward the number of turns identical, the lower non-return valve 2 be simultaneously connected with test solution entrance 1 is closed because of own wt and solution pressure effect, the upper non-return valve 2` that test solution outlet 4 is connected open because of the thrust of solution, piston 8 makes standard liquid flow to test solution outlet 4 injection buret, completes and once gets liquid process.Often move back and forth once, namely DC servo motor 7 stops.When test solution exports the acousto-optical prompting device 5 at 4 places and inductive switch is again triggered, job control program order-driven DC servo motor 7, repeat action last time.
Claims (2)
1. the quantitative quick filling machine of titrating solution, comprise electrical control part, program controls portions and electrical appliance kit and container facility, it is characterized in that reagent bottle is on ground, by tubes connection test solution suction mouth, test solution suction mouth is connected with three-way pipe lower end by the lower non-return valve arranged in pipeline, the middle port of three-way pipe is connected with constant volume device entrance end, upper end is connected with the test solution port of export by upper non-return valve, and with middle port at same vertical plane, the turning cylinder of DC servo motor and piston are mechanically connected by axle connected device; Electrical appliance part: the photoinduction switch installed at the test solution port of export, single-chip microcomputer, led charactron, input rotary switch, acousto-optical prompting device is had in electrical appliance kit, integral installation on a printed-wiring board, and is connected by the holding wire of wire with the power line of DC servo motor and the encoder of afterbody; Program controls portions: rotate the input value 1-55mL that the input knob on electrical appliance kit sets to single-chip microcomputer, and this numerical value is presented on led charactron, job control program in single-chip microcomputer obtain start DC servo motor drive signal, make servomotor promote constant volume device, DC servo motor rotates forward the suction amount driving piston to complete test solution, the test solution of reagent bottle is pumped in constant volume device by conduit, and simultaneously encoder condition feedback that DC servo motor is driven is to single-chip microcomputer control program; When the DC servo motor rotating cycle calculated is equal with the numerical value of DC servo motor rotary encoder, DC servo motor stops rotation forward or backwards, rotate in the opposite direction afterwards, the test solution equivalent extracted is discharged, and make the photoinduction switch of the test solution port of export send signal, often move back and forth once, namely DC servo motor stops, and completes and once gets test solution process; When again producing the signal of acousto-optical prompting device and photoinduction switch, being namely the instruction starting again DC servo motor, carrying out reciprocating motion next time.
2. the quantitative quick filling machine of titrating solution according to claim 1, it is characterized in that circuit connects: power supply selects finished product Switching Power Supply, specification is 5V/1A, 12V/3A; Rotation input switch S1 in parallel between 5V positive source, earthing pole, by the pin 12 of wire access single-chip microcomputer U1, counts for input quantity; Counting pull-up resistor R1 and single-chip microcomputer U1 pin 12 with rotate input switch S1 and be connected; The liquid outlet photoinduction switch S 2 being arranged on liquid outlet 2 place is connected to the pin 13 of single-chip microcomputer U1 by wire, for starting the quantitative quick filling machine of titrating solution; Fluid pull-up resistor R2 is connected by cable with liquid outlet photoinduction switch S 2 with the pin 13 of single-chip microcomputer U1; Replacement resistance R3 in parallel between 5V positive source, earthing pole is connected with the pin 9 of single-chip microcomputer U1 with replacement electric capacity C3, has carried out the reset of single-chip microcomputer U1; The B1--B8 end that a, b, c, d, e, f, g section of 2 common anode LED charactron DPY1, LED charactron DPY2 is connected to respectively and drives integrated package U3, drive integrated package U2; Drive integrated package U3, drive the A1--A8 of integrated package U2 end to be connected to the P00---P07 end of single-chip microcomputer U1 by bus; The pin 1 of integrated package U2 is driven to be connected to the pin 24 of single-chip microcomputer U1; The pin 1 of integrated package U3 is driven to be connected to the pin 25 of single-chip microcomputer U1; 2 common anode LED charactron DPY1, drive the pin 3 of integrated package DPY2, one end that pin 8 accesses respective current-limiting resistance R7, current-limiting resistance R8 respectively, the other end access 5V positive source of current-limiting resistance R7, current-limiting resistance R8; The pin 23 of single-chip microcomputer U1 is by current-limiting resistance R4 connecting triode Q1; Triode Q1 colelctor electrode drives buzzer LS1 and LED D1 to complete the function of acousto-optical prompting device 6; Buzzer one end of acousto-optical prompting device 6 is connected with one end of prompting resistance R5 and accesses 5V positive source in the lump, the colelctor electrode of another termination triode Q1, the anode of another termination LED D1 of prompting resistance R5, the negative electrode of LED D1 connects the colelctor electrode of triode Q1, the grounded emitter of triode Q1; DC servo motor drives the pin 5 of integrated package U4, pin 6 is connected to single-chip microcomputer U1 respectively pin 21, pin 22, control rotating and reverse of DC servo motor respectively; One end that DC servo motor drives pin 1 ground connection of integrated package U4, pin 2 connects DC servo motor, another termination motor of DC servo motor drives the pin 10 of integrated package U4; Motor drives the pin 3 of integrated package U4 to connect one end of shunt capacitance C4, the other end ground connection of feed-through capacitor C4; Motor drives the pin 9 of integrated package U4 to connect one end of shunt capacitance C5, the other end ground connection of feed-through capacitor C5; The negative electrode of Zener diode D2 connects the pin 4 that motor drives integrated package U4, plus earth; Motor drives the pin 7 of integrated package U4 to be connected to 12V positive source; One end of motor current-limiting resistance R6 is connected to 12V positive source, and the other end of motor current-limiting resistance R6 is connected to the pin 8 that motor drives integrated package U4; The signal stitch 1-pin 8 of DC servo motor 7 afterbody encoder is connected to the terminals P 10--P17 of single-chip microcomputer U1 by cable, complete the detection of rotating cycle to DC servo motor and direction of rotation; Two pin of crystal oscillator X1 are connected to pin 18, the pin 19 of single-chip microcomputer U1 respectively, and a pin of starting of oscillation electric capacity C1 and starting of oscillation electric capacity C2 connects a pin of crystal oscillator X1, another pin power cathode respectively.
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| CN201410334978.1A CN104128217B (en) | 2014-07-15 | 2014-07-15 | The quantitative quick filling machine of titrating solution |
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| CN104128217B true CN104128217B (en) | 2015-12-02 |
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| CN202346737U (en) * | 2011-11-18 | 2012-07-25 | 武汉天为科技发展有限责任公司 | Fluid quantitative filling control device |
| CN202687925U (en) * | 2012-06-22 | 2013-01-23 | 金坛市金旺包装科技有限公司 | Precise liquid material filling mechanism for liquid filling machine |
| CN103456522A (en) * | 2013-08-23 | 2013-12-18 | 宁国市柯美自动化设备制造有限公司 | Epoxy quantitative filling device |
| CN203653208U (en) * | 2013-12-24 | 2014-06-18 | 丽江坤源食品有限公司 | Filling machine |
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2014
- 2014-07-15 CN CN201410334978.1A patent/CN104128217B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1386164A (en) * | 1971-05-27 | 1975-03-05 | Hubers E | Method of filling containers enclosing solid matter with an accurate amount of liquid |
| CN2199974Y (en) * | 1994-03-17 | 1995-06-07 | 苏强 | Fast quantitative liquid filling device |
| CN201592980U (en) * | 2010-01-15 | 2010-09-29 | 周数理 | Screw pump filling device driven by servo motor |
| WO2011108358A2 (en) * | 2010-03-03 | 2011-09-09 | Dow Corning Toray Co., Ltd. | Dispenser for highly viscous fluid |
| CN202346737U (en) * | 2011-11-18 | 2012-07-25 | 武汉天为科技发展有限责任公司 | Fluid quantitative filling control device |
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| CN103456522A (en) * | 2013-08-23 | 2013-12-18 | 宁国市柯美自动化设备制造有限公司 | Epoxy quantitative filling device |
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