CN209462006U - Peanut cake pulverizer overload protection arrangement - Google Patents
Peanut cake pulverizer overload protection arrangement Download PDFInfo
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- CN209462006U CN209462006U CN201920454606.0U CN201920454606U CN209462006U CN 209462006 U CN209462006 U CN 209462006U CN 201920454606 U CN201920454606 U CN 201920454606U CN 209462006 U CN209462006 U CN 209462006U
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Abstract
The peanut cake pulverizer overload protection arrangement of the utility model, overload detection circuit are separately connected overload and adjust circuit, power-off protection trigger circuit；This practical 0-10mA current signal by current transformer output is converted to faint voltage signal, it is compared into comparator with overload voltage, when overload, export low level, voltage signal is transmitted to three-phase ac voltage regulation circuit through subtracter output difference signal and motor feeds driving circuit, with this by adjusting three-phase alternating current, the amount for changing feeding makes motor nonoverload, avoid unnecessary overload protection, relay K2 coil obtains electric simultaneously, voltage signal enters integrator and calculates voltage change ratio, voltage change ratio is timing, exclude three characteristics of the middle term exchange, the overload of machine caused by feeding capacity, voltage-stabiliser tube Z1 breakdown, triode Q2 conducting, overload relay K1 normally-closed contact disconnects, cutting three-phase alternating-current supply is for establishing by cable immediately, carry out overload protection, avoiding overload causes peanut cake to crush electromechanical machine burning apparatus Impaired problem.
Description
Technical field
The utility model relates to peanut cake pulverizer technical fields, especially peanut cake pulverizer overload protection arrangement.
Background technique
When peanut cake pulverizer feeding capacity is excessive or three phase supply abnormity of power supply (higher or relatively low, asymmetrical voltage, lack
Phase, low frequency) and when mechanical reason (motor damage, bearing oil starvation etc.), peanut cake pulverizer can be made to overload, if long-term cross carrying
It is big that route calorific value occurs in guild, and the bored machine of equipment, abnormal sound, to reduce line insulation horizontal, the feelings such as cause motor burning apparatus impaired
The generation of condition.
Therefore, peanut cake pulverizer overload phenomenon how is excluded, reducing failure problems is peanut cake pulverizer factory
Family needs deep thinking and urgent 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 based on peanut cake pulverizer overload protection
Device, effective solution cause peanut cake to crush the impaired problem of electromechanical machine burning apparatus due to overloading.
Its technical solution solved is, including overload detection circuit, overload adjust circuit, power-off protection trigger circuit,
It is characterized in that, overload detection circuit is separately connected overload and adjusts circuit, power-off protection trigger circuit；
The power-off protection trigger circuit includes relay K2 normally opened contact K2-1, and the one of relay K2 normally opened contact K2-1
The other end of end connection resistance R4, one end of the other end connection resistance R12 of relay K2 normally opened contact K2-1, resistance R12's
The other end is separately connected one end of the inverting input terminal of operational amplifier AR3, capacitor C3, the homophase input of operational amplifier AR3
End by resistance R7 connection, the output end of operational amplifier AR3 be separately connected the other end of capacitor C3, voltage-stabiliser tube Z1 bear
Pole, the anode of voltage-stabiliser tube Z1 be separately connected the base stage of triode Q2, one end of ground capacity C2, resistance R11 one end, resistance
The other end of R11 connects power supply+12V, and the emitter of triode Q2 connects ground, and the collector of triode Q2 is separately connected diode
The anode of D5, one end of overload relay K1 coil, red indicating light LED1 cathode, red indicating light LED1 anode connection
One end of resistance R10, the other end of resistance R10, the cathode of diode D1, overload relay K1 coil the other end be all connected with electricity
Source+12V, overload relay K1 normally-closed contact string is in three-phase alternating-current supply power supply open pipe.
Preferably, the overload detection circuit includes resistance R1, and one end of resistance R1 is separately connected the two of current transformer
Secondary side one end, one end of capacitor C1, resistance R3 one end, the secondary side other end, the electricity of the other end of resistance R1, current transformer
The other end for holding C1 connects ground, and the other end of resistance R3 is separately connected the non-inverting input terminal of operational amplifier AR1, potentiometer RW1
Left end and adjustable end, the inverting input terminal of operational amplifier AR1 by resistance R2 connection, the output of operational amplifier AR1
End be separately connected the right end of potentiometer RW1, the cathode of diode D1, the anode of diode D2, operational amplifier AR2 it is same mutually defeated
Enter end, the anode connection ground of diode D1, the cathode of diode D2 connects power supply+5V, the inverting input terminal of operational amplifier AR2
It is separately connected the output end of operational amplifier AR2, one end of resistance R4, the end VCC of operational amplifier AR2 connects power supply+12V,
The end GND of operational amplifier AR2 connects ground, the inverting input terminal of the other end connection operational amplifier AR4 of resistance R4, and operation is put
The non-inverting input terminal of big device AR4 is separately connected one end of one end of ground resistance R6, resistance R5, and the other end of resistance R5 connects electricity
Source+5V；
It includes resistance R8, the output end of one end connection operational amplifier AR4 of resistance R8, resistance that the overload, which adjusts circuit,
The other end of R8 is separately connected the base stage of triode Q1, the other end of the emitter connection resistance R4 of triode Q1, triode Q1
Collector be separately connected the non-inverting input terminal of operational amplifier AR5, one end of relay K2 coil, diode D6 cathode,
The anode connection of the other end, diode D6 of relay K2 coil, the inverting input terminal of operational amplifier AR5 connects potentiometer
The adjustable end of RP1, the lower end of potentiometer RP1 connect ground, and one end of the upper end connection resistance R9 of potentiometer RP1, resistance R9's is another
One end connects power supply+12V, and the output end of operational amplifier AR5 is connected to three-phase ac voltage regulation circuit and motor charging driving electricity
Road.
The utility model structure is simple, response is fast, the 0-10mA current signal for being exported current transformer by resistance R1
Faint voltage signal is converted to, enters comparator after 0-5V, buffering through filtering, amplification, clipping and is compared with overload voltage
When compared with, overload, low level is exported, triode Q1 conducting, voltage signal, which enters, transports row subtraction, output difference signal transmission
Driving circuit is fed to three-phase ac voltage regulation circuit and motor, motor is made by adjusting the amount of three-phase alternating current, change feeding with this
Nonoverload, avoids unnecessary overload protection, while relay K2 coil obtains electric, and voltage signal enters integrator and calculates electricity
Buckling rate, voltage change ratio are timing, exclude machine caused by three characteristics of the middle term exchange, feeding capacity and overload, voltage-stabiliser tube Z1 breakdown, three poles
Pipe Q2 conducting, red indicating light is bright while overload relay K1 normally-closed contact disconnects, and cuts off three-phase alternating-current supply immediately and supplies to establish by cable,
Overload protection is carried out, overload is avoided and peanut cake is caused to crush the impaired problem of electromechanical machine burning apparatus.
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, peanut cake pulverizer overload protection arrangement, overload detection circuit pass through resistance R1 for current transformer
The 0-10mA current signal of output is converted to faint voltage signal, through filtering, amplification, clipping after 0-5V, most afterwards through operation
Amplifier AR1 buffering is output to the inverting input terminal and non-inverting input terminal for being added to operational amplifier AR1 after improving carrying load ability
The corresponding voltage of overload voltage is compared, and when overload, is exported low level, is added to the base that overload adjusts triode Q1 in circuit
Pole, triode Q1 conducting, 0-5V voltage signal enter all the way operational amplifier AR5 non-inverting input terminal and inverting input terminal it is specified
The corresponding voltage of electric current carries out subtraction, and operational amplifier AR5 is subtracter, and output difference signal is transmitted to three-phase alternating current tune
Volt circuit and motor charging driving circuit carry out the amount for three phase ac voltage regulation, changing feeding, and the three characteristics of the middle term is avoided to exchange unstable (mistake
It is high or too low), overload fault can make motor nonoverload but carry out overload protection by adjusting caused by the amount of feeding, avoid not
Necessary overload protection, another way trigger relay K2 coil obtain electric, and 0-5V voltage signal enters in power-off protection trigger circuit
Integrator, to the corresponding voltage change ratio of curent change for adjusting certain time (10S) through overload, voltage change when calculating overload
Rate be positive (namely electric current increase) when, exclude three characteristics of the middle term exchange, machine caused by feeding capacity overloads, voltage-stabiliser tube Z1 breakdown, three poles
Pipe Q2 conducting, red indicating light is bright while overload relay K1 normally-closed contact disconnects, and cuts off three-phase alternating-current supply immediately and supplies to establish by cable,
Overload protection is carried out, overload is avoided and peanut cake is caused to crush the impaired problem of electromechanical machine burning apparatus；The power-off protection touching
Power Generation Road is for when overloading, relay K2 coil to obtain electric, normally opened contact K2-1 closure, the normally opened contact that 0-5V is disconnected through delay
K2-1 enters when integrator calculates overload to the corresponding voltage change of curent change for adjusting certain time (10S) through overload
Rate, voltage change ratio be positive (namely electric current increase) when, exclude three characteristics of the middle term exchange, machine caused by feeding capacity overloads, voltage-stabiliser tube Z1
Breakdown, triode Q2 conducting, red indicating light is bright while overload relay K1 normally-closed contact disconnects, and cuts off three-phase alternating current immediately
Source carries out overload protection for establishing by cable.
Embodiment two, on the basis of example 1, the 0-10mA that the overload detection circuit exports current transformer
(as model LZZB9-10 can be selected, 100/5 current transformer string is detected current signal in phase line, is existing skill
Art, this will not be detailed here) it flows through resistance R1 and generates faint voltage signal, enter operational amplifier AR1, electricity after capacitor C1 filtering
The amplifying circuit that resistance R2, resistance R3, potentiometer RW1 are formed amplifies faint voltage signal, adjusts resistance R3 or current potential
Amplification factor is adjusted in the resistance value of device RW1, that is, adjusts the size of amplifying circuit output voltage, after through diode D1, diode
D2 connects clipping in 0-5V, is most added to operational amplifier AR1's after operational amplifier AR1 buffering, raising carrying load ability afterwards
Inverting input terminal voltage corresponding with non-inverting input terminal overload voltage (the peanut cake pulverizer of specific such as model RQKL-50,
Rated current 4A, rated power 1.5KW, voltage rating 380V/50Hz, when the electric current of detection is 1.2 times of rated current, as
The corresponding voltage 3.5V of 4.8A) it is compared, when overload, low level is exported, high level is otherwise exported；
The overload adjusts the low and high level that circuit receives overload detection circuit output, and low level is added to the base of triode Q1
When pole, triode Q1 conducting, 0-5V voltage signal enters the non-inverting input terminal and inverting input terminal volume of operational amplifier AR5 all the way
The corresponding voltage of constant current (bleeder circuit of resistance R9 and potentiometer RP1 composition provides) carries out subtraction, operational amplifier
AR5 is subtracter, and it (can be thyristor or other power switch component groups that output difference signal, which is transmitted to three-phase ac voltage regulation circuit,
At two-way switch be connected between three-phase alternating-current supply and peanut cake pulverizer, by control two-way switch turn-on and turn-off when
Between the ratio between control output voltage, this is the prior art, and this will not be detailed here) and motor charging driving circuit (can be pulsewidth modulation
Chip is adjusted the speed according to the pwm signal that the size of difference signal is converted into certain pulse duty cycle, this is the prior art, herein
No longer it is described in detail) amount that carries out to three phase ac voltage regulation, change feeding, avoid the three characteristics of the middle term from exchanging unstable (too high or too low), feeding
Amount caused by overload fault motor nonoverload can be made but to carry out overload protection by adjusting, avoid unnecessary overload guarantor
Shield.
The utility model carry out using when, the 0-10mA current signal that is exported current transformer by resistance R1
Faint voltage signal is converted to, enters comparator after 0-5V, buffering through filtering, amplification, clipping and is compared with overload voltage
When compared with, overload, low level is exported, triode Q1 conducting, voltage signal, which enters, transports row subtraction, output difference signal transmission
The amount for three phase ac voltage regulation, changing feeding is carried out to three-phase ac voltage regulation circuit and motor charging driving circuit, is avoided because of three
Mutually exchanging overload fault caused by the amount of unstable (too high or too low), feeding can be such that motor nonoverload is but overloaded by adjusting
Protection, avoids unnecessary overload protection, while relay K2 coil obtains electric, and voltage signal enters integrator and calculates voltage
Change rate, voltage change ratio are timing, exclude machine caused by three characteristics of the middle term exchange, feeding capacity and overload, voltage-stabiliser tube Z1 breakdown, triode
Q2 conducting, red indicating light is bright while overload relay K1 normally-closed contact disconnects, and cuts off three-phase alternating-current supply immediately and supplies to establish by cable, into
Row overload protection avoids overload and peanut cake is caused to crush the impaired problem of electromechanical machine burning apparatus.
Claims (3)
1. peanut cake pulverizer overload protection arrangement, including overload detection circuit, overload adjust circuit, power-off protection triggering electricity
Road, which is characterized in that overload detection circuit is separately connected overload and adjusts circuit, power-off protection trigger circuit；
The power-off protection trigger circuit includes relay K2 normally opened contact K2-1, and one end of relay K2 normally opened contact K2-1 connects
The other end of connecting resistance R4, one end of the other end connection resistance R12 of relay K2 normally opened contact K2-1, resistance R12's is another
End is separately connected one end of the inverting input terminal of operational amplifier AR3, capacitor C3, and the non-inverting input terminal of operational amplifier AR3 is logical
Resistance R7 connection ground is crossed, the output end of operational amplifier AR3 is separately connected the cathode of the other end of capacitor C3, voltage-stabiliser tube Z1, surely
The anode of pressure pipe Z1 be separately connected the base stage of triode Q2, one end of ground capacity C2, resistance R11 one end, resistance R11's is another
One end connects power supply+12V, and the emitter of triode Q2 connects ground, and the collector of triode Q2 is being separately connected diode D5 just
Pole, one end of overload relay K1 coil, red indicating light LED1 cathode, red indicating light LED1 anode connection resistance
One end of R10, the other end of resistance R10, the cathode of diode D1, overload relay K1 coil the other end be all connected with power supply+
12V, overload relay K1 normally-closed contact string is in three-phase alternating-current supply power supply open pipe.
2. peanut cake pulverizer overload protection arrangement according to claim 1, which is characterized in that the overload detection circuit
Including resistance R1, one end of resistance R1 be separately connected secondary side one end of current transformer, one end of capacitor C1, resistance R3 one
End, the other end of resistance R1, the secondary side other end of current transformer, capacitor C1 the other end connect ground, resistance R3's is another
End is separately connected the non-inverting input terminal of operational amplifier AR1, the left end of potentiometer RW1 and adjustable end, and operational amplifier AR1's is anti-
By resistance R2 connection, the output end of operational amplifier AR1 is separately connected the right end of potentiometer RW1, diode to phase input terminal
The non-inverting input terminal of the cathode of D1, the anode of diode D2, operational amplifier AR2, the anode connection ground of diode D1, diode
The cathode of D2 connects power supply+5V, and the inverting input terminal of operational amplifier AR2 is separately connected the output end of operational amplifier AR2, electricity
One end of R4 is hindered, the end VCC of operational amplifier AR2 connects power supply+12V, and the end GND of operational amplifier AR2 connects ground, resistance R4
The other end connection operational amplifier AR4 inverting input terminal, the non-inverting input terminal of operational amplifier AR4 be separately connected ground connection electricity
One end of R6, one end of resistance R5 are hindered, the other end of resistance R5 connects power supply+5V；
It includes resistance R8 that the overload, which adjusts circuit, and one end of resistance R8 connects the output end of operational amplifier AR4, resistance R8's
The other end is separately connected the base stage of triode Q1, the other end of the emitter connection resistance R4 of triode Q1, the collection of triode Q1
Electrode be separately connected the non-inverting input terminal of operational amplifier AR5, one end of relay K2 coil, diode D6 cathode, relay
The anode connection of the other end, diode D6 of device K2 coil, the inverting input terminal of operational amplifier AR5 connects potentiometer RP1
Adjustable end, the lower end of potentiometer RP1 connects ground, one end of the upper end connection resistance R9 of potentiometer RP1, the other end of resistance R9
Power supply+12V is connected, the output end of operational amplifier AR5 is connected to three-phase ac voltage regulation circuit and motor charging driving circuit.
3. peanut cake pulverizer overload protection arrangement according to claim 2, which is characterized in that the relay K2 is to prolong
When the relay that disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454606.0U CN209462006U (en) | 2019-04-04 | 2019-04-04 | Peanut cake pulverizer overload protection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454606.0U CN209462006U (en) | 2019-04-04 | 2019-04-04 | Peanut cake pulverizer overload protection arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN209462006U true CN209462006U (en) | 2019-10-01 |
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ID=68047685
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920454606.0U Expired - Fee Related CN209462006U (en) | 2019-04-04 | 2019-04-04 | Peanut cake pulverizer overload protection arrangement |
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| Country | Link |
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| CN (1) | CN209462006U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829355A (en) * | 2019-11-29 | 2020-02-21 | 郑州工程技术学院 | Mechanical equipment overload protection device |
| CN112366992A (en) * | 2020-10-22 | 2021-02-12 | 上海卫星工程研究所 | Satellite double-super-platform magnetic levitation electric driving circuit |
-
2019
- 2019-04-04 CN CN201920454606.0U patent/CN209462006U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829355A (en) * | 2019-11-29 | 2020-02-21 | 郑州工程技术学院 | Mechanical equipment overload protection device |
| CN110829355B (en) * | 2019-11-29 | 2021-06-22 | 郑州工程技术学院 | Mechanical equipment overload protection device |
| CN112366992A (en) * | 2020-10-22 | 2021-02-12 | 上海卫星工程研究所 | Satellite double-super-platform magnetic levitation electric driving circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191001 |
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| CF01 | Termination of patent right due to non-payment of annual fee |