CN209157101U - Vacuum pressure casting machine casting temperature control device - Google Patents
Vacuum pressure casting machine casting temperature control device Download PDFInfo
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- CN209157101U CN209157101U CN201821770310.1U CN201821770310U CN209157101U CN 209157101 U CN209157101 U CN 209157101U CN 201821770310 U CN201821770310 U CN 201821770310U CN 209157101 U CN209157101 U CN 209157101U
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- resistance
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- operational amplifier
- circuit
- temperature
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Abstract
The vacuum pressure casting machine casting temperature control device of the utility model, processes temperature signal circuit connection trigger switch circuit, trigger switch circuit connection electromagnetic heating adjust circuit；Efficiently solve using PID temperature control system control casting pot in temperature, dynamic response is slow, cause temperature adjust not in time the problem of.Whether temperature is abnormal when the utility model judges vacuum pressure casting machine founding by window comparator circuit, high level is exported when abnormal, make triode Q4 saturation conduction, photoelectrical coupler U1 conducting, temperature signal after operational amplifier AR3 is the hysteresis comparator pressure stabilizing of core is added to the three-level turning circuit step by step of triode Q1, Q2, Q3 composition, by being shunted with electromagnetic heating coil L1 parallel resistance, to adjust the heating power of electromagnetic heating coil L1, circuit structure is simple, response is fast, solves the problems, such as that temperature is adjusted not in time.
Description
Technical field
The utility model relates to casting machine technical fields, especially vacuum pressure casting machine casting temperature control device.
Background technique
Prior art discloses application No. is 201721878112.2 vacuum pressure casting machines, using electromagnetic heating line
Ring when making Metal Melting more evenly, and is equipped with PID temperature control system around agitating and heating, the temperature being precisely controlled in casting pot,
Guarantee the consistency of product, but temperature of the vacuum pressure casting machine in founding since raw material is constantly absorbing heat, in casting pot
Constantly converting, though PID temperature control system improves temperature controlled precision, and it is slow at dynamic response, it will cause temperature and adjust not
Timely problem.
Therefore the utility model provides a kind of new scheme to solve the problems, such as this.
Utility model content
In view of the deficienciess of the prior art, the utility model aim is to provide the control of vacuum pressure casting machine casting temperature
Device efficiently solves the temperature controlled in casting pot using PID temperature control system, and dynamic response is slow, and temperature is caused to adjust not
Timely problem.
Its technical solution solved is, including processes temperature signal circuit, trigger switch circuit, electromagnetic heating adjust electricity
Road, which is characterized in that processes temperature signal circuit connection trigger switch circuit, trigger switch circuit connection electromagnetic heating adjust electricity
Road；
The trigger switch circuit includes resistance R4, resistance R8, and one end of resistance R4 connects temperature with one end of resistance R8
The output signal end of signal processing circuit, the other end of resistance R4 are separately connected the base stage of one end of resistance R12, triode Q4,
The other end of resistance R12 connects ground with the emitter of triode Q4, and the collector connection photoelectrical coupler U1's of triode Q4 draws
Foot 2, the pin 1 of photoelectrical coupler U1 connect power supply+5V, the anti-phase input of the other end connection operational amplifier AR3 of resistance R8
End, the non-inverting input terminal of operational amplifier AR3 are separately connected the left end and adjustable end of one end of resistance R9, potentiometer RP1, resistance
The other end of R9 connects power supply+5V, and the right end of potentiometer RP1 is separately connected the cathode of one end of resistance R11, diode D1, electricity
The other end of resistance R11 is separately connected the anode of diode D1, the output end of operational amplifier AR3, one end of resistance R10, photoelectricity
The pin 4 of coupler U1, the other end of resistance R10 connect power supply+15V, operational amplifier with the end VCC of operational amplifier AR3
The end GND of AR3 connects ground, and the pin 3 of photoelectrical coupler U1 is the output signal of trigger switch circuit.
Whether temperature is abnormal when the utility model judges vacuum pressure casting machine founding by window comparator circuit, when abnormal
High level is exported, triode Q4 saturation conduction, photoelectrical coupler U1 conducting are made, is the sluggish ratio of core through operational amplifier AR3
Compared with the three-level turning circuit step by step that the temperature signal after device pressure stabilizing is added to triode Q1, Q2, Q3 composition, by with electromagnetic heating line
It encloses L1 parallel resistance to shunt, to adjust the heating power of electromagnetic heating coil L1, circuit structure is simple, response is fast, solves temperature
The problem of degree is adjusted not in time.
Detailed description of the invention
Fig. 1 is the circuit connection module map of the utility model.
Fig. 2 is the circuit connection schematic diagram of the utility model.
Specific embodiment
For aforementioned and other technology contents, feature and effect in relation to the utility model, following cooperation with reference to figures 1 through
Fig. 2 can be clearly presented in the detailed description of embodiment.The structure content being previously mentioned in following embodiment is to say
Bright book attached drawing is reference.
Each exemplary embodiment of the utility model is described below with reference to accompanying drawings.
Embodiment one, vacuum pressure casting machine casting temperature control device, processes temperature signal circuit pass through operation amplifier
Device AR1, operational amplifier AR2 are the window comparator circuit of core judges whether temperature is abnormal when vacuum pressure casting machine founding,
High level is exported when abnormal, high level drives triode Q4 saturation conduction in trigger switch circuit, photoelectrical coupler U1 conducting, temperature
Degree signal is exported after operational amplifier AR3 is the hysteresis comparator pressure stabilizing of core by the pin 3 of photoelectrical coupler U1, it is laggard
Enter the three-level turning circuit step by step that electromagnetic heating adjusts triode Q1, Q2, Q3 composition in circuit, by with electromagnetic heating coil L1
Parallel resistance shunts, and to adjust the heating power of electromagnetic heating coil L1, circuit structure is simple, response is fast, solves temperature tune
The problem of saving not in time；The trigger switch circuit is used for when processes temperature signal circuit output high level, and triode Q4 is full
And conducting, triode Q4 collector ground potential are connected to the pin 2 of photoelectrical coupler U1, since the pin 1 of photoelectrical coupler U1 connects
Power supply+5V is met, photoelectrical coupler U1 conducting, (operational amplifier AR3 is the sluggishness of core to 4 voltage of pin of photoelectrical coupler U1
Comparator eliminates voltage after minor fluctuations voltage, that is, pressure stabilizing, improves the precision of adjustment signal) pin 3 through photoelectrical coupler U1 is defeated
Out, including resistance R4, resistance R8, one end of resistance R4 connect the output signal of processes temperature signal circuit with one end of resistance R8
End, the other end of resistance R4 are separately connected the base stage of one end of resistance R12, triode Q4, the other end and triode of resistance R12
The emitter of Q4 connects ground, the pin 2 of the collector connection photoelectrical coupler U1 of triode Q4, the pin 1 of photoelectrical coupler U1
Power supply+5V is connected, the inverting input terminal of the other end connection operational amplifier AR3 of resistance R8, operational amplifier AR3's is same mutually defeated
Enter end and be separately connected one end of resistance R9, the left end of potentiometer RP1 and adjustable end, the other end of resistance R9 connects power supply+5V, electricity
The right end of position device RP1 is separately connected the cathode of one end of resistance R11, diode D1, and the other end of resistance R11 is separately connected two poles
The anode of pipe D1, the output end of operational amplifier AR3, one end of resistance R10, photoelectrical coupler U1 pin 4, resistance R10's
The other end connects power supply+15V with the end VCC of operational amplifier AR3, and the end GND of operational amplifier AR3 connects ground, photoelectric coupling
The pin 3 of device U1 is the output signal of trigger switch circuit.
Embodiment two, on the basis of example 1, the processes temperature signal circuit is for judging vacuum pressure casting
Whether temperature is abnormal when machine founding, and high level is exported when abnormal, is specifically by operational amplifier AR1, operational amplifier AR2
The window comparator circuit of core by received temperature signal and upper limit threshold voltage and lower threshold voltage (specifically: upper limit threshold
The bleeder circuit of threshold voltage and right resistance R1, R2, R3 composition of lower threshold voltage provides, such as mild steel upper limit threshold voltage 4.3V
1450 degree of ceiling temperature when corresponding mild steel founding, lower limit temperature 1420 when lower threshold voltage answers mild steel founding to 3.8V
Degree) be compared, when being higher than ceiling temperature or being lower than lower limit temperature, window comparator circuit exports high level, through voltage-stabiliser tube Z1 or
It is exported after Z2 pressure stabilizing, including operational amplifier AR1, operational amplifier AR2, the inverting input terminal and operation of operational amplifier AR1
Amplifier AR2 non-inverting input terminal is all connected with the temperature signal that vacuum casting machine casting temperature measuring device transmits, and operation is put
The inverting input terminal of big device AR2 is separately connected one end of one end of resistance R1, resistance R2, operational amplifier AR1 non-inverting input terminal
It is separately connected the other end of resistance R2, one end of resistance R3, the other end of resistance R1 connects power supply+15V, the other end of resistance R3
Connection ground, the cathode of the output end connection voltage-stabiliser tube Z1 of operational amplifier AR1, the output end of operational amplifier AR2 connect pressure stabilizing
The cathode of pipe Z2, the anode of voltage-stabiliser tube Z1 and the just extremely output signal end of processes temperature signal circuit of voltage-stabiliser tube Z2；It is described
Electromagnetic heating adjusts pin 3 of the amplitude limiter circuit to photoelectrical coupler U1 that circuit passes through diode D2 and diode D3 composition first
Output signal clipping enters the three-level turning circuit step by step of triode Q1, Q2, Q3 composition in 0-+5V later, and voltage is high after clipping
When 4.5V, triode Q1 conducting, relay K1 coil obtain electric, normally opened contact closure, and resistance R5 and electromagnetic heating coil L1 are simultaneously
Join, when voltage is higher than 4.75V after clipping, triode Q1, Q2 conducting, relay K1, K2 coil obtain electric, normally opened contact closure, electricity
Hinder R5 and resistance R6 it is in parallel with electromagnetic heating coil L1, after clipping voltage be higher than 4.9V when, triode Q1, Q2, Q3 be connected, after
Electric appliance K1, K2, K3 coil obtains electric, normally opened contact closure, resistance R5 and resistance R6 and resistance R7 with electromagnetic heating coil L1 simultaneously
Connection further decreases the heating power of electromagnetic heating coil L1 by shunting with electromagnetic heating coil L1 parallel resistance, conversely, limit
When voltage is lower than 3.8V after width, electromagnetic heating coil L1 carries out total power heating power, including triode Q1, diode D2, two
Pole pipe D3, the base stage of triode Q1, the cathode of diode D2, diode D3 cathode be all connected with the pin 3 of photoelectrical coupler U1,
The anode connection ground of anode the connection power supply+5V, diode D3 of diode D2, the emitter of triode Q1 are separately connected relay
One end of K1 coil, triode Q2 base stage, the emitter of triode Q2 is separately connected one end of relay K2 coil, triode
The base stage of Q3, one end of the emitter connection relay K3 coil of triode Q3, the collector of triode Q1, Q2, Q3 are all connected with
Power supply+12V, the other end of relay K1, K2, K3 coil are all connected with ground, and the common end of relay K1, K2, K3 are all connected with electromagnetism
One end of heating coil L1, the normally opened contact of relay K1, K2, K3 are separately connected one end of resistance R5, resistance R6, resistance R7,
The other end of the other end electromagnetic heating coil L1 of resistance R6, resistance R7, resistance R8.
The utility model carry out using when, by operational amplifier AR1, operational amplifier AR2 be core window
Mouthful comparison circuit by received temperature signal and upper limit threshold voltage and lower threshold voltage (specifically: upper limit threshold voltage and
The bleeder circuit of right resistance R1, R2, R3 composition of lower threshold voltage provides, as mild steel upper limit threshold voltage 4.3V corresponds to low-carbon
1450 degree of ceiling temperature when steel founding, 1420 degree of lower limit temperature when lower threshold voltage answers mild steel founding to 3.8V) compare
It is relatively whether abnormal come temperature when judging vacuum pressure casting machine founding, when being higher than ceiling temperature or being lower than lower limit temperature, window ratio
Compared with circuit output high level, triode Q4 base stage is output to after voltage-stabiliser tube Z1 or Z2 pressure stabilizing, at this time triode Q4 saturation conduction,
Photoelectrical coupler U1 conducting, (operational amplifier AR3 is that the hysteresis comparator of core is eliminated to 4 voltage of pin of photoelectrical coupler U1
Voltage after minor fluctuations voltage, that is, pressure stabilizing, improves the precision of adjustment signal) pin 3 through photoelectrical coupler U1 is output to diode
The amplitude limiter circuit clipping of D2 and diode D3 composition in 0-+5V, lead step by step by the three-level for entering triode Q1, Q2, Q3 composition later
Circuit passband, when voltage is higher than 4.5V after clipping, triode Q1 conducting, relay K1 coil obtain electric, normally opened contact closure, resistance R5
In parallel with electromagnetic heating coil L1, when voltage is higher than 4.75V after clipping, triode Q1, Q2 conducting, relay K1, K2 coil are obtained
Electricity, normally opened contact closure, resistance R5 and resistance R6 are in parallel with electromagnetic heating coil L1, when voltage is higher than 4.9V after clipping, three
Pole pipe Q1, Q2, Q3 conducting, relay K1, K2, K3 coil obtain electric, normally opened contact closure, and resistance R5 and resistance R6 and resistance R7 are equal
It is in parallel with electromagnetic heating coil L1, by further decreasing electromagnetic heating coil L1 with the shunting of electromagnetic heating coil L1 parallel resistance
Heating power, conversely, after clipping voltage be lower than 3.8V when, electromagnetic heating coil L1 carry out total power heating power.
Claims (2)
1. vacuum pressure casting machine casting temperature control device, including processes temperature signal circuit, trigger switch circuit, electromagnetism add
Thermal conditioning circuit, which is characterized in that processes temperature signal circuit connection trigger switch circuit, trigger switch circuit connection electromagnetism add
Thermal conditioning circuit；
The trigger switch circuit includes resistance R4, resistance R8, and one end of resistance R4 connects temperature signal with one end of resistance R8
The output signal end of processing circuit, the other end of resistance R4 are separately connected the base stage of one end of resistance R12, triode Q4, resistance
The other end of R12 connects ground with the emitter of triode Q4, and the collector of triode Q4 connects the pin 2 of photoelectrical coupler U1,
The pin 1 of photoelectrical coupler U1 connects power supply+5V, the inverting input terminal of the other end connection operational amplifier AR3 of resistance R8, fortune
The non-inverting input terminal for calculating amplifier AR3 is separately connected the left end and adjustable end of one end of resistance R9, potentiometer RP1, resistance R9's
The other end connects power supply+5V, and the right end of potentiometer RP1 is separately connected the cathode of one end of resistance R11, diode D1, resistance R11
The other end be separately connected the anode of diode D1, the output end of operational amplifier AR3, one end of resistance R10, photoelectrical coupler
The pin 4 of U1, the other end of resistance R10 connect power supply+15V with the end VCC of operational amplifier AR3, operational amplifier AR3's
The end GND connection ground, the pin 3 of photoelectrical coupler U1 are the output signal of trigger switch circuit.
2. vacuum pressure casting machine casting temperature control device as described in claim 1, which is characterized in that the temperature signal
Processing circuit includes operational amplifier AR1, operational amplifier AR2, the inverting input terminal and operational amplifier of operational amplifier AR1
AR2 non-inverting input terminal is all connected with the temperature signal that vacuum casting machine casting temperature measuring device transmits, operational amplifier AR2
Inverting input terminal be separately connected one end of one end of resistance R1, resistance R2, operational amplifier AR1 non-inverting input terminal is separately connected
One end of the other end of resistance R2, resistance R3, the other end of resistance R1 connect power supply+15V, and the other end of resistance R3 connects ground,
The cathode of the output end connection voltage-stabiliser tube Z1 of operational amplifier AR1, the output end connection voltage-stabiliser tube Z2's of operational amplifier AR2 is negative
Pole, the anode of voltage-stabiliser tube Z1 and the just extremely output signal end of processes temperature signal circuit of voltage-stabiliser tube Z2；
It includes triode Q1, diode D2, diode D3, the base stage of triode Q1, diode that the electromagnetic heating, which adjusts circuit,
The cathode of D2, the cathode of diode D3 are all connected with the pin 3 of photoelectrical coupler U1, the anode connection power supply+5V of diode D2, and two
The anode connection ground of pole pipe D3, the emitter of triode Q1 are separately connected the base stage of one end of relay K1 coil, triode Q2,
The emitter of triode Q2 is separately connected the base stage of one end of relay K2 coil, triode Q3, and the emitter of triode Q3 connects
One end of contact relay K3 coil, the collector of triode Q1, Q2, Q3 are all connected with power supply+12V, relay K1, K2, K3 coil
The other end be all connected with ground, the common end of relay K1, K2, K3 are all connected with one end of electromagnetic heating coil L1, relay K1,
The normally opened contact of K2, K3 are separately connected one end of resistance R5, resistance R6, resistance R7, resistance R6, resistance R7, resistance R8 it is another
Hold the other end of electromagnetic heating coil L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821770310.1U CN209157101U (en) | 2018-10-30 | 2018-10-30 | Vacuum pressure casting machine casting temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821770310.1U CN209157101U (en) | 2018-10-30 | 2018-10-30 | Vacuum pressure casting machine casting temperature control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209157101U true CN209157101U (en) | 2019-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821770310.1U Expired - Fee Related CN209157101U (en) | 2018-10-30 | 2018-10-30 | Vacuum pressure casting machine casting temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209157101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653347A (en) * | 2019-10-31 | 2020-01-07 | 广东工业大学 | Plugging device |
-
2018
- 2018-10-30 CN CN201821770310.1U patent/CN209157101U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653347A (en) * | 2019-10-31 | 2020-01-07 | 广东工业大学 | Plugging device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190726 Termination date: 20211030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |