CN2933830Y - Electric-liquid ratio valve constant-current control device of full-automatic blowing plastic hollow molding machine - Google Patents
Electric-liquid ratio valve constant-current control device of full-automatic blowing plastic hollow molding machine Download PDFInfo
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- CN2933830Y CN2933830Y CN 200620098216 CN200620098216U CN2933830Y CN 2933830 Y CN2933830 Y CN 2933830Y CN 200620098216 CN200620098216 CN 200620098216 CN 200620098216 U CN200620098216 U CN 200620098216U CN 2933830 Y CN2933830 Y CN 2933830Y
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Abstract
A constant electric current control device of electro-hydraulic proportion valve of automatic plastic blow and injection molding machine relates to a control device which consists of a PIC single-chip machine --- PLC --- high speed single-chip control device. The device consists of a PLC high speed single-chip machine system, a PIC single chip machine, a control device driving system and a control panel. The PLC, high speed single chip machine, electrical level transfer circuit and current direction control circuit constitute the PLC --- high speed single-chip machine system. The high speed single-chip machine connects to an interconnected electrical level transfer circuit and current direction control circuit, and the electrical level transfer circuit and current direction control circuit connect with the PLC. The PIC single-chip machine connects with the PLC, and control device driving system connects to the PIC single-chip machine and PIC; system control panel and hydraulic constant current control parameter control panel constitute the control panel. The device is of accurate constant current control effect, stable equipment operation, high speed operation, high system performance / price ratio and friendly human-machine interface.
Description
Technical field
The utility model relates to a kind of automaton, the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device that particularly a kind of PIC single-chip microcomputer-Programmable Logic Controller (hereinafter to be referred as PLC)-high-speed microprocessor is formed.
Background technology
One of important process condition of injecting blowing plastic hollow molding is the hydraulic pressure of each technical process of requirement and stability of flow and meets the requirement of technology to hydraulic pressure and flow.Electro-hydraulic proportional valve is a kind of output quantity and the proportional hydraulic valve of input signal, it can control pressure, flow and the direction of liquid stream continuously pari passu by given input electrical signal, injecting blowing plastic hollow molding hydraulic system is applied in locked mode, injection, colloidal sol, pressurize, cooling, die sinking, looses core in the bottle producing process process, lock pin, get to know and rise and following degradation several stages, it is different that each stage needs pressure and flow, injecting blowing plastic hollow molding hydraulic system drives electro-hydraulic proportional valve in each constant current in stage, makes pressure, flow-control more stable.Full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve control device mainly contains two types: the one, and the analog control device of electro-hydraulic proportional valve, its analog circuit complexity and adjusting of parameter of control can not be adjusted respectively according to each stage of technology; The 2nd, digital control device, adjusting of the control parameter of this control device can be adjusted respectively according to each stage of technology, but man-machine interface can not be according to the characteristics design of full-automatic injecting blowing plastic blow moulding machine, can only independent self-organizing system, cause the system architecture complexity, on the other hand because a dust cycle of injecting blowing plastic hollow molding only about 6 seconds, the requirement information transfer rate is fast, with parallel interface is good, also need to increase the hardware spending of system control device like this with the interface of the system control device of injecting blowing plastic hollow molding, cause cost to rise.
The utility model content
The purpose of this utility model is to provide a kind of can obtain high-accuracy and constant current control effect, stable equipment operation, its system architecture is simple relatively, easy to operate, man-machine interface is friendly full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device, with the analog control device that overcomes existing electro-hydraulic proportional valve to adjusting of control parameter can not be adjusted respectively according to each stage of technology, the digital control device man-machine interface can not be according to the characteristics design of full-automatic injecting blowing plastic blow moulding machine, system architecture complexity, problem that cost performance is not high.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device, by the PLC-high speed mcu system, the PIC single-chip microcomputer, control device drive system and control panel are formed, the PLC-high speed mcu system is by PLC, high-speed microprocessor, level shifting circuit and sense of current control circuit are formed, high-speed microprocessor is connected with 4 bit address buses with 8 bit data bus of PLC by binding post, to obtain operation duty and the electro-hydraulic proportional valve hydraulic flow value of setting of full-automatic injecting blowing plastic blow moulding machine, high-speed microprocessor also is connected with sense of current control circuit with interconnective level shifting circuit respectively, above-mentioned level shifting circuit is connected with PLC by binding post with sense of current control circuit, the PIC single-chip microcomputer is connected with 4 bit address buses with 8 bit data bus of PLC by binding post, respectively move duty and the electro-hydraulic proportional valve hydraulic flow value of setting with what obtain the full-automatic injecting blowing plastic blow moulding machine, this value of setting is as the set-point of electro-hydraulic proportional valve hydraulic flow constant current PID control;
The control device drive system is by the electro-hydraulic proportional valve current detection circuit, electro-hydraulic proportional valve hydraulic flow constant-current drive circuit, the hydraulic valve drive circuit, electro-hydraulic proportional valve and single-direction and dual-direction control hydraulic valve are formed, one end of electro-hydraulic proportional valve current detection circuit is connected with the A/D converter of PIC single-chip microcomputer inside, the other end is connected with electro-hydraulic proportional valve hydraulic flow constant-current drive circuit, one end of above-mentioned electro-hydraulic proportional valve hydraulic flow constant-current drive circuit is connected with the PIC single-chip microcomputer, the other end is connected with electro-hydraulic proportional valve by binding post, one end of hydraulic valve drive circuit is connected with single-direction and dual-direction control hydraulic valve, and the other end is connected with PLC by binding post; Control panel is made up of system control panel and hydraulic flow constant current control parameter control panel, and system control panel is connected with the PLC-high speed mcu system by binding post, and hydraulic flow constant current control parameter control panel is connected with the PIC single-chip microcomputer.
System control panel is by matrix keyboard, dot matrix lcd module, touch-screen, the liquid crystal display mode block controller, the touch screen interface circuit, button, system and temperature control power switch, light emitting diode and matrix keyboard and keyboard pcb are formed, matrix keyboard is connected with PLC by binding post, dot matrix lcd module is connected with the liquid crystal display mode block controller, touch-screen is connected with the touch screen interface circuit, the liquid crystal display mode block controller is connected high-speed microprocessor with the touch screen interface circuit by binding post, keyboard directly is connected with high-speed microprocessor with light emitting diode, touch-screen covers above the display screen of dot matrix lcd module, matrix keyboard, button and light emitting diode are installed on matrix keyboard and the keyboard pcb, high speed mcu system and system control panel circuit board are installed in below matrix keyboard and the keyboard pcb, and system and temperature control power switch are installed in the left side on the system control panel.
Hydraulic flow constant current control parameter control panel is by button, light emitting diode, the serial liquid crystal indicator, proportioning valve electric current constant-current control device power switch and hydraulic flow constant current control parameter control panel circuit board are formed, described button, light emitting diode, the serial liquid crystal indicator is connected with the PIC single-chip microcomputer respectively, proportioning valve electric current constant-current control device power switch is positioned at described button below, hydraulic flow constant current control parameter control panel circuit board is installed in button, the below of light emitting diode and serial liquid crystal indicator, hydraulic flow constant current control parameter control panel is positioned at the right of system control panel.
Electro-hydraulic proportional valve hydraulic flow constant-current drive circuit is made up of the latch that is linked in sequence, 8 D/A converters and current-amplifying driving circuit, one end of current-amplifying driving circuit is connected with the electro-hydraulic proportional valve current detection circuit, and the other end is connected with electro-hydraulic proportional valve.
Because adopt above structure, the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model has following beneficial effect:
One, can obtain high-accuracy and constant current control effect:
In the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model, PIC single-chip microcomputer and high-speed microprocessor are by 8 bit data bus of programmable controller and the various work state informations of 4 bit address buses acquisition full-automatic injecting blowing plastic blow moulding machine, the electro-hydraulic proportional valve current detection circuit obtains the current information of pressure flow, the PIC single-chip microcomputer then can be chosen pid control parameter and electric current rising automatically according to the duty of full-automatic injecting blowing plastic blow moulding machine, the rate of descent parameter, and calculate the control parameter value by pid algorithm, through latch, D/A converter drives signal to drive electro-hydraulic proportional valve work to the current-amplifying driving circuit output current by the PIC single-chip microcomputer.Because the setting of hydraulic pressure and flow constant current control parameter is to be provided with down according to full-automatic injecting blowing plastic blow moulding machine different operating state, and PID constant current algorithm can select pid control parameter for the running status of the full-automatic injecting blowing plastic blow moulding machine of PIC single-chip microcomputer according to 8 bit data bus and the 4 bit address bus transfer of PLC automatically, electric current overshoot can not surpass electric current value of setting 5%, reaches the effect of high accuracy control.
Two, the equipment operation is more stable, and the equipment speed of service improves
The full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model can be provided with electric current according to the job step of full-automatic injecting blowing plastic blow moulding machine and rise, the rate of descent parameter, in servicely choose electric current automatically according to job step and rise, the rate of descent parameter, when driving electro-hydraulic proportional valve electric current changes greatly between adjacent job step, less current is set to rise, the rate of descent parameter reduces current changing rate, make it can not produce mechanical shock to equipment components, the equipment operation is more stable, between adjacent job step, drive the electro-hydraulic proportional valve electric current and change hour, bigger electric current rising is set, rate of descent improves the equipment speed of service.
Three, systemic price ratio height:
The full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model with the PIC single-chip microcomputer as control core, form as a whole system with PLC-high speed mcu system, control device drive system and control panel, system architecture is simpler, the hardware spending that does not need additionally to increase system control device can be realized the effect of high-speed transfer information, the cost performance height of system.
Four, automaticity and reliability height, man-machine interface close friend, simple to operate, easy to use:
When using this control device, the operator is the keyboard of need on system control panel or the hydraulic flow constant current parameter setting values of each working stage of touch-screen input full-automatic injecting blowing plastic blow moulding machine only, control parameter by the button on the hydraulic flow constant current control parameter control panel according to the hydraulic flow constant current parameter setting values input that dot matrix lcd module shows again, the PIC single-chip microcomputer can be chosen pid control parameter and electric current rising automatically according to the duty of full-automatic injecting blowing plastic blow moulding machine, the rate of descent parameter, the value of setting of each duty pressure flow and the real-time current information of pressure flow are relatively obtained difference in the back, through the PID constant current control algorithm, the PIC single-chip microcomputer is through latch, D/A converter drives signal to the current-amplifying driving circuit output current, and current-amplifying driving circuit output drives electro-hydraulic proportional valve work.Above-mentioned control procedure all is full automatic, and therefore, it is very easy to operate, and has good man computer interface.
Below, the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device to the utility model is further described in conjunction with the accompanying drawings and embodiments.
Description of drawings
Fig. 1: the structure principle chart of the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model;
Fig. 2: the systematic schematic diagram of the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model;
Fig. 3: the guidance panel figure of the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model;
Among the figure:
The I-PLC-high speed mcu system, II-control device drive system,
The IIIA-system control panel, IIIB-hydraulic flow constant current control parameter control panel;
1-PLC, the 2-high-speed microprocessor, the 3-PIC single-chip microcomputer, 4-battle array keyboard,
The 5-dot matrix lcd module, the 6-touch-screen, 7-liquid crystal display mode block controller,
8-touch screen interface circuit, the 9-level shifting circuit, 10-sense of current control circuit, the 11-button,
The 12-light emitting diode, 13,14,15,16, the 17-binding post, the 18-8 bit data bus,
19-4 bit address bus, 20-electro-hydraulic proportional valve current detection circuit,
21-electro-hydraulic proportional valve hydraulic flow constant-current drive circuit, the 22-electro-hydraulic proportional valve,
23-hydraulic valve drive circuit, 24-single-direction and dual-direction control hydraulic valve, the 25-button, the 26-light emitting diode,
27-serial liquid crystal indicator, the 28-latch, the 29-D/A converter,
The 30-current-amplifying driving circuit, 31-system and temperature control power switch,
32-electro-hydraulic proportional valve electric current constant-current control device power switch, 33-matrix keyboard and keyboard pcb,
34-PLC-high speed mcu system and system control panel circuit board,
35-hydraulic flow constant current control parameter control panel circuit board.
The specific embodiment
A kind of full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device is made up of PLC-high speed mcu system I, PIC single-chip microcomputer 3, control device drive system II and control panel III; PLC-high speed mcu system I is by PLC1, high-speed microprocessor 2, level shifting circuit 9 and sense of current control circuit 10 are formed, high-speed microprocessor 2 is by binding post 14,17 are connected with 4 bit address buses 19 with 8 bit data bus 18 of PLC1, to obtain operation duty and the electro-hydraulic proportional valve hydraulic flow value of setting of full-automatic injecting blowing plastic blow moulding machine, high-speed microprocessor 2 also is connected with sense of current control circuit 10 with interconnective level shifting circuit 9 respectively, above-mentioned level shifting circuit 9 and sense of current control circuit 10 are connected with PLC1 by binding post 14,17; PIC single-chip microcomputer 3 is by binding post 16,17 are connected with 4 bit address buses 19 with 8 bit data bus 18 of PLC1, respectively move duty and the electro-hydraulic proportional valve hydraulic flow value of setting with what obtain the full-automatic injecting blowing plastic blow moulding machine, this value of setting is as the set-point of electro-hydraulic proportional valve hydraulic flow constant current PID control;
Control device drive system II is by electro-hydraulic proportional valve current detection circuit 20, electro-hydraulic proportional valve hydraulic flow constant-current drive circuit 21, electro-hydraulic proportional valve 22, hydraulic valve drive circuit 23 and single-direction and dual-direction control hydraulic valve 24 are formed, one end of electro-hydraulic proportional valve current detection circuit 20 is connected with the A/D converter of PIC single-chip microcomputer 3 inside, the other end is connected with electro-hydraulic proportional valve hydraulic flow constant-current drive circuit 21, one end of electro-hydraulic proportional valve hydraulic flow constant-current drive circuit 21 is connected with PIC single-chip microcomputer 3, the other end is connected with electro-hydraulic proportional valve 22 by binding post 15, one end of hydraulic valve drive circuit 23 is connected with single-direction and dual-direction control hydraulic valve 24, and the other end is connected with PLC1 by binding post 15; Control panel III is made up of system control panel IIIA and hydraulic flow constant current control parameter control panel IIIB, system control panel IIIA is connected with PLC-high speed mcu system I by binding post 13,14,17, and hydraulic flow constant current control parameter control panel IIIB is connected (referring to Fig. 1, Fig. 2) with PIC single-chip microcomputer 3.
System control panel IIIA is by matrix keyboard 4, dot matrix lcd module 5, touch-screen 6, liquid crystal display mode block controller 7, touch screen interface circuit 8, button 11, system and temperature control power switch 31, light emitting diode 12 and matrix keyboard and keyboard pcb 33 are formed, matrix keyboard 4 is by binding post 13,17 are connected with PLC1, dot matrix lcd module 5 is connected with liquid crystal display mode block controller 7, described touch-screen 6 is connected with touch screen interface circuit 8, liquid crystal display mode block controller 7 and touch screen interface circuit 8 are by binding post 13,14 connect high-speed microprocessor 2, keyboard 11 directly is connected with high-speed microprocessor 2 with light emitting diode 12, touch-screen 6 covers above the display screen of dot matrix lcd module 5, matrix keyboard 4, button 11 and light emitting diode 12 are installed on matrix keyboard and the keyboard pcb 33, PLC-high speed mcu system and system control panel circuit board 34 are installed in below matrix keyboard and the keyboard pcb 33, and system and temperature control power switch 31 are installed in the left side on the system control panel IIIA;
Hydraulic flow constant current control parameter control panel IIIB is by button 25, light emitting diode 26, serial liquid crystal indicator 27, electro-hydraulic proportional valve electric current constant-current control device power switch 32 and hydraulic flow constant current control parameter control panel circuit board 35 are formed, button 25, light emitting diode 26, serial liquid crystal indicator 27 is connected with PIC single-chip microcomputer 3 respectively, electro-hydraulic proportional valve electric current constant-current control device power switch 32 is positioned at described button 25 belows, and hydraulic flow constant current control parameter control panel circuit board 35 is installed in button 25, the below of light emitting diode 26 and serial liquid crystal indicator 27; Hydraulic flow constant current control parameter control panel IIIB is positioned at the right of system control panel IIIA, referring to Fig. 3.
Described electro-hydraulic proportional valve hydraulic flow constant-current drive circuit 21 is by latch 28,8 D/A converters 29, current-amplifying driving circuit 30 is formed, latch 28 1 ends are connected with the I/O port of PIC single-chip microcomputer 3, latch 28 other ends are connected with 8 D/A converters 29,8 D/A converters 29 are connected with current-amplifying driving circuit 30, current-amplifying driving circuit 30 is connected with electro-hydraulic proportional valve current detection circuit 20, electro-hydraulic proportional valve current detection circuit 20 is connected with the A/D converter of PIC single-chip microcomputer 3 inside, forms electro-hydraulic proportional valve hydraulic flow constant current closed-loop control system.Current-amplifying driving circuit 30 is connected with electro-hydraulic proportional valve 22, drives electro-hydraulic proportional valve 22 work, referring to Fig. 2.
Below, the course of work of the full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device of the utility model is described in conjunction with Fig. 1, Fig. 2, Fig. 3:
Closed-system and temperature control power switch 31 and PIC electro-hydraulic proportional valve hydraulic flow Constant Current Control System power switch 32, PIC single-chip microcomputer 3, PLC-high speed mcu system I, control device drive system II and control panel III energising, at first respectively move the setting of the hydraulic flow constant current control parameter under the duty:
Press matrix keyboard 4 buttons or touch-screen 6, system enters the hydraulic flow parameter state is set, and the hydraulic flow parameter is provided with available following dual mode:
(1) from matrix keyboard 4 inputs: matrix keyboard 4 is by binding post 13,17 are connected with PLC1,8 bit data bus 18 of PLC1 are connected with high-speed microprocessor 2 with 4 bit address buses 19, thereby make high-speed microprocessor 2 obtain hydraulic flow parameter setting values and corresponding with it technical process, high-speed microprocessor 2 is by binding post 14,13 are connected with liquid crystal display mode block controller 7, liquid crystal display mode block controller 7 is connected with dot matrix lcd module 5, the operator can import the hydraulic flow constant current parameter setting values of each working stage of full-automatic injecting blowing plastic blow moulding machine by matrix keyboard, and dot matrix lcd module 7 shows hydraulic flow parameter setting values and corresponding with it technical process.
(2) from touch-screen 6 inputs: touch-screen 6 is connected with touch screen interface circuit 8, touch screen interface circuit 8 is by splicing ear 13,14 are connected with high-speed microprocessor 2, make high-speed microprocessor 2 obtain the touch-screen parameter setting information, high-speed microprocessor 2 is connected with sense of current control circuit 10 with level shifting circuit 9, level shifting circuit 9 and sense of current control circuit 10 are by binding post 14,17 connect PLC1,8 bit data bus 18 of PLC1 are connected with high-speed microprocessor 2 with 4 bit address buses 19, thereby make high-speed microprocessor 2 obtain hydraulic flow parameter setting values and corresponding with it technical process, high-speed microprocessor 2 is by binding post 14,13 are connected with liquid crystal display mode block controller 7, liquid crystal display mode block controller 7 is connected with dot matrix lcd module 5, the operator can be by the hydraulic flow constant current parameter setting values of touch-screen 6 each working stage of input full-automatic injecting blowing plastic blow moulding machine, and dot matrix lcd module 7 shows hydraulic flow parameter setting values and corresponding with it technical process.
PIC single-chip microcomputer 3 is connected with 4 bit address buses 19 with 8 bit data bus 18 of PLC1 with binding post 17 by binding post 16, with hydraulic flow parameter setting values and the corresponding with it technical process that obtains the full-automatic injecting blowing plastic blow moulding machine.
The setting of electro-hydraulic proportional valve hydraulic flow control parameter: the setting of electro-hydraulic proportional valve hydraulic flow control parameter matches with the electro-hydraulic proportional valve hydraulic flow parameter setting values of full-automatic injecting blowing plastic blow moulding machine and corresponding with it technical process.
Button 25 has 5, and wherein 1 button is the function shift key, and 1 for confirming the parameter enter key.25 function shift key pushes button, enter the hydraulic flow constant current control parameter value state that is provided with, this moment is by pushing button 25 function shift key one by one, realize that each parameter is provided with the switching of function: pushing button 25 is transformed into electro-hydraulic proportional valve hydraulic pressure Current Control pid parameter state of value is set, and pushes button 25 electro-hydraulic proportional valve hydraulic pressure current value is set changes climbing speed from low to high; Push button and 25 electro-hydraulic proportional valve hydraulic pressure current value is set changes fall off rate from high to low; Push button 25, be transformed into electro-hydraulic proportional valve flow Current Control pid parameter state of value is set, pushing button 25 is provided with electro-hydraulic proportional valve hydraulic pressure current value and changes climbing speed from low to high; Push button and 25 electro-hydraulic proportional valve hydraulic pressure current value is set changes fall off rate from high to low; 25 the affirmation parameter enter key of pushing button is kept at the parameter that is provided with in the PIC single-chip microcomputer 3; 25 the function shift key of pushing button at last makes PIC single-chip microcomputer 3 enter electro-hydraulic proportional valve hydraulic flow constant current control running status.When carrying out being provided with of hydraulic flow current control parameter value, can not influence the normal constant current control work of electro-hydraulic proportional valve hydraulic flow Constant Current Control System.
PIC single-chip microcomputer 3 connects serial liquid crystal indicator 27, and when electro-hydraulic proportional valve hydraulic flow constant current control running status, serial liquid crystal indicator 27 shows the real-time current value of electro-hydraulic proportional valve hydraulic flow.
The control procedure of electro-hydraulic proportional valve hydraulic flow constant current:
This process is full-automatic, the full-automatic injecting blowing plastic blow moulding machine in normal operation, PIC single-chip microcomputer 3 is by being connected with 4 bit address buses 19 with 8 bit data bus 18 of PLC1, the operation duty of value of setting of the electro-hydraulic proportional valve hydraulic flow of acquisition full-automatic injecting blowing plastic blow moulding machine and corresponding with it technical process, the inside A/D converter of PIC single-chip microcomputer 3 is connected with electro-hydraulic proportional valve current detection circuit 20, the electric current instantaneous value of electro-hydraulic proportional valve hydraulic flow is converted to data signal, this data signal and the electro-hydraulic proportional valve hydraulic flow value of setting relatively obtain difference, pass through pid algorithm again, controlled driving output valve, control drives output valve and connects D/A converter 29 by latch 28, control drives output and is converted to analog drive signal, current-amplifying driving circuit 30 output constant currents drive signal, drive electro-hydraulic proportional valve 22 work.The utility model is a closed loop PID hydraulic flow constant-current control device, dot matrix lcd module 6 on the system control panel IIIA shows the operation duty of full-automatic injecting blowing plastic blow moulding machines and value of setting of corresponding electro-hydraulic proportional valve hydraulic flow with it, the electric current instantaneous value of the serial liquid crystal indicator 27 demonstration electro-hydraulic proportional valve hydraulic flows on the hydraulic flow constant current control parameter control panel IIIB in real time.
The control principle of this control device is:
Pid algorithm is adopted in full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant current control.Hydraulic flow constant current parameter setting values by the matrix keyboard on the system control panel IIIA 4 or touch-screen 6 each working stage of input full-automatic injecting blowing plastic blow moulding machine, its value is stored among the PLC1,8 bit data bus 18 that high-speed microprocessor 2 is formed from the I/O port of PLC1 and 4 bit address buses 19 obtain the electro-hydraulic proportional valve hydraulic flow parameter setting values of full-automatic injecting blowing plastic blow moulding machines and the status information of corresponding technical process with it, and high-speed microprocessor 2 is by dot matrix lcd module 5 demonstration electro-hydraulic proportional valve hydraulic flow electric current constant current parameter setting values.8 bit data bus 18 that PIC single-chip microcomputer 3 is formed from the I/O port of PLC1 and 4 bit address buses 19 obtain the electro-hydraulic proportional valve hydraulic flow parameter setting values of full-automatic injecting blowing plastic blow moulding machines and the status information of the technical process of correspondence with it, the electro-hydraulic proportional valve hydraulic flow parameter setting values that shows according to dot matrix lcd module 5 by the button 25 of hydraulic flow constant current control parameter control panel IIIB and the status information of the technical process of correspondence with it, pid control parameter and current-rising-rate and electric current rate of descent parameter are set, the current information of electro-hydraulic proportional valve pressure flow obtains after the A/D converter conversion of PIC single-chip microcomputer 3 inside from the electro-hydraulic proportional valve current detection circuit, PIC single-chip microcomputer 3 chooses pid control parameter automatically according to the duty of full-automatic injecting blowing plastic blow moulding machine and electric current rises, the rate of descent parameter, the value of setting of each duty pressure flow compares with the real-time current information of pressure flow, obtain difference, through the PID constant current control algorithm, PIC single-chip microcomputer 3 is through latch 28, D/A converter 29 drives signal to current-amplifying driving circuit 30 output currents, and current-amplifying driving circuit 30 outputs drive electro-hydraulic proportional valve work.In addition, PIC single-chip microcomputer 3 application software designs triangular wave vibrating signal generator drives triangular wave vibrating signal PIC single-chip microcomputer 3 output currents that are added on the signal, reduces the response to the electric-hydraulic proportion valve performance of magnetic hysteresis and frictional force.Because the setting of hydraulic pressure and flow constant current control parameter is to be provided with down according to full-automatic injecting blowing plastic blow moulding machine different operating state, when between adjacent job step, driving proportioning valve current value generation great changes, can not produce mechanical shock to equipment components, when between adjacent job step, driving the proportioning valve current value and producing less variation, can not influence the speed of service of equipment.
Claims (3)
1, a kind of full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device, it is characterized in that: this electro-hydraulic proportional valve electric current constant-current control device is made up of PLC-high speed mcu system (I), PIC single-chip microcomputer (3), control device drive system (II) and control panel (III);
Described PLC-high speed mcu system (I) is by PLC (1), high-speed microprocessor (2), level shifting circuit (9) and sense of current control circuit (10) are formed, high-speed microprocessor (2) is by binding post (14,17) be connected with 4 bit address buses (19) with 8 bit data bus (18) of PLC (1), to obtain operation duty and the electro-hydraulic proportional valve hydraulic flow value of setting of full-automatic injecting blowing plastic blow moulding machine, high-speed microprocessor (2) also is connected with sense of current control circuit (10) with interconnective level shifting circuit (9) respectively, above-mentioned level shifting circuit (9) and sense of current control circuit (10) are connected with PLC (1) by binding post (14,17);
Described PIC single-chip microcomputer (3) is by binding post (16,17) be connected with 4 bit address buses (19) with 8 bit data bus (18) of PLC (1), respectively move duty and the electro-hydraulic proportional valve hydraulic flow value of setting with what obtain the full-automatic injecting blowing plastic blow moulding machine, this value of setting is as the set-point of electro-hydraulic proportional valve hydraulic flow constant current PID control;
Described control device drive system (II) is by electro-hydraulic proportional valve current detection circuit (20), electro-hydraulic proportional valve hydraulic flow constant-current drive circuit (21), hydraulic valve drive circuit (23), electro-hydraulic proportional valve (22) and single-direction and dual-direction control hydraulic valve (24) are formed, one end of described electro-hydraulic proportional valve current detection circuit (20) is connected with the A/D converter of PIC single-chip microcomputer (3) inside, the other end is connected with electro-hydraulic proportional valve hydraulic flow constant-current drive circuit (21), one end of above-mentioned electro-hydraulic proportional valve hydraulic flow constant-current drive circuit (21) is connected with PIC single-chip microcomputer (3), the other end is connected with electro-hydraulic proportional valve (22) by binding post (15), one end of described hydraulic valve drive circuit (23) is connected with single-direction and dual-direction control hydraulic valve (24), and the other end is connected with PLC (1) by binding post (15);
Described control panel (III) is made up of system control panel (IIIA) and hydraulic flow constant current control parameter control panel (IIIB), system control panel (IIIA) is by binding post (13,14,17) be connected with PLC-high speed mcu system (I), hydraulic flow constant current control parameter control panel (IIIB) is connected with PIC single-chip microcomputer (3).
2, full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device as claimed in claim 1, it is characterized in that: described system control panel (IIIA) is by matrix keyboard (4), dot matrix lcd module (5), touch-screen (6), liquid crystal display mode block controller (7), touch screen interface circuit (8), button (11), system and temperature control power switch (31), light emitting diode (12) and matrix keyboard and keyboard pcb (33) are formed, described matrix keyboard (4) is by binding post (13,17) be connected with PLC (1), described dot matrix lcd module (5) is connected with liquid crystal display mode block controller (7), described touch-screen (6) is connected with touch screen interface circuit (8), liquid crystal display mode block controller (7) and touch screen interface circuit (8) are by binding post (13,14) connect high-speed microprocessor (2), keyboard (11) directly is connected with high-speed microprocessor (2) with light emitting diode (12), touch-screen (6) covers above the display screen of dot matrix lcd module (5), matrix keyboard (4), button (11) and light emitting diode (12) are installed on matrix keyboard and the keyboard pcb (33), PLC-high speed mcu system and system control panel circuit board (34) are installed in below matrix keyboard and the keyboard pcb (33), and system and temperature control power switch (31) are installed in the left side on the system control panel (IIIA);
Described hydraulic flow constant current control parameter control panel (IIIB) is by button (25), light emitting diode (26), serial liquid crystal indicator (27), electro-hydraulic proportional valve electric current constant-current control device power switch (32) and hydraulic flow constant current control parameter control panel circuit board (35) are formed, described button (25), light emitting diode (26), serial liquid crystal indicator (27) is connected with PIC single-chip microcomputer (3) respectively, electro-hydraulic proportional valve electric current constant-current control device power switch (32) is positioned at button (25) below, and hydraulic flow constant current control parameter control panel circuit board (35) is installed in button (25), the below of light emitting diode (26) and serial liquid crystal indicator (27); This hydraulic flow constant current control parameter control panel (IIIB) is positioned at the right of system control panel (IIIA).
3, full-automatic injecting blowing plastic blow moulding machine electro-hydraulic proportional valve electric current constant-current control device as claimed in claim 1 or 2, it is characterized in that: described electro-hydraulic proportional valve hydraulic flow constant-current drive circuit (21) is made up of the latch that is linked in sequence (28), 8 D/A converters (29), current-amplifying driving circuit (30), one end of described current-amplifying driving circuit (30) is connected with electro-hydraulic proportional valve current detection circuit (20), and the other end is connected with electro-hydraulic proportional valve (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620098216 CN2933830Y (en) | 2006-07-31 | 2006-07-31 | Electric-liquid ratio valve constant-current control device of full-automatic blowing plastic hollow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620098216 CN2933830Y (en) | 2006-07-31 | 2006-07-31 | Electric-liquid ratio valve constant-current control device of full-automatic blowing plastic hollow molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2933830Y true CN2933830Y (en) | 2007-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620098216 Expired - Fee Related CN2933830Y (en) | 2006-07-31 | 2006-07-31 | Electric-liquid ratio valve constant-current control device of full-automatic blowing plastic hollow molding machine |
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| Country | Link |
|---|---|
| CN (1) | CN2933830Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101554775B (en) * | 2009-05-11 | 2013-07-10 | 张家港市普天机械制造有限公司 | Hydraulic driving device in hollow blow molding machine |
-
2006
- 2006-07-31 CN CN 200620098216 patent/CN2933830Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101554775B (en) * | 2009-05-11 | 2013-07-10 | 张家港市普天机械制造有限公司 | Hydraulic driving device in hollow blow molding machine |
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Granted publication date: 20070815 Termination date: 20110731 |