CN110259675A - Water circulating pump band cooling blower frequency conversion one drag two control circuit and system - Google Patents
Water circulating pump band cooling blower frequency conversion one drag two control circuit and system Download PDFInfo
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- CN110259675A CN110259675A CN201910542747.2A CN201910542747A CN110259675A CN 110259675 A CN110259675 A CN 110259675A CN 201910542747 A CN201910542747 A CN 201910542747A CN 110259675 A CN110259675 A CN 110259675A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 149
- 238000001816 cooling Methods 0.000 title claims abstract description 128
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000001012 protector Effects 0.000 claims description 67
- 230000008859 change Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000008450 motivation Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 101000604592 Homo sapiens Keratin-like protein KRT222 Proteins 0.000 description 6
- 102100038184 Keratin-like protein KRT222 Human genes 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Multiple Motors (AREA)
Abstract
A kind of water circulating pump band cooling blower frequency conversion one drag two control circuit and system, by the way that switching control circuit and major loop is added, realizing major loop can power on according to the switching signal in switching control circuit to the first circulation water pump and first cooling blower, and to the second circulation water pump and second cooling blower power between switch, it realizes while can be by switching control loop switch water circulating pump, also achieve in handoff procedure water circulating pump with its corresponding to cooling blower can link, water circulating pump is avoided in handoff procedure as that can not link with the cooling blower corresponding to it, to cause cooling velocity slow, cooling effect is unobvious and the higher problem of energy consumption, it is low to solve in traditional technical solution that there are switching efficiencies, water circulating pump can not with the cooling blower corresponding to it link with And the problem that energy consumption is high.
Description
Technical field
The invention belongs to technical field of electric control more particularly to a kind of band cooling blower frequency conversion one drag two controls of water circulating pump
Circuit processed and system.
Background technique
Currently, traditional water circulating pump the using and the reserved control system needs to start by turns using two frequency converters, it is general logical
The switchover operation that hand push button artificially realizes two water pumps is crossed, and this mode water circulating pump the using and the reserved control system needs are adopted
Started by turns with two frequency converters, the general switchover operation by manual operation two water pumps of realization, and water circulating pump can not be with
Cooling blower linkage corresponding to it, to cause that cooling velocity is slow, cooling effect is unobvious and energy consumption is higher.
Therefore, there are switching efficiencies in traditional technical solution, and low, water circulating pump can not be with the cooling blower corresponding to it
Linkage and the high problem of energy consumption.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of water circulating pump band cooling blower frequency conversion one drag two control circuit and
System, it is intended to solve switching efficiency present in traditional technical solution is low, water circulating pump can not be with the cooling wind corresponding to it
The problem that machine links and energy consumption is high.
The first aspect of the embodiment of the present invention provides a kind of water circulating pump band cooling blower frequency conversion one drag two control circuit,
Include:
Switching control circuit, the switching control circuit are used to generate switching signal according to operational order；With
The power input of major loop, the major loop is connect with AC power source, each power supply output of the major loop
End is connect with first circulation water pump, second circulation water pump, the first cooling blower and the second cooling blower respectively, the major loop
For powering on according to the switching signal to the first circulation water pump and first cooling blower, and give described second
Water circulating pump and second cooling blower switch between powering on.
The second aspect of the embodiment of the present invention provides a kind of water circulating pump band cooling blower frequency conversion one drag two control system,
It include: first circulation water pump；Second circulation water pump；First cooling blower；Second cooling blower；DCS cabinet；And as the present invention is real
Apply the band cooling blower frequency conversion one drag two control circuit of water circulating pump described in the first aspect of example.
Above-mentioned water circulating pump band cooling blower frequency conversion one drag two control circuit and system, by the way that switching control circuit is added
And major loop, realizing major loop can be according to the switching signal in switching control circuit to the first circulation water pump and described
First cooling blower powers on, and to the second circulation water pump and second cooling blower power between switch, that is, realize
While can by switching control loop switch water circulating pump, it is right to also achieve water circulating pump and its institute in handoff procedure
The cooling blower answered can link, and avoid in handoff procedure water circulating pump as that can not join with the cooling blower corresponding to it
It is dynamic, to cause that cooling velocity is slow, cooling effect is unobvious and the higher problem of energy consumption, solve in traditional technical solution
There is a problem of that switching efficiency is low, water circulating pump can not link with the cooling blower corresponding to it and energy consumption is high.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is that the water circulating pump that one embodiment of the invention provides shows with the circuit of cooling blower frequency conversion one drag two control circuit
It is intended to；
Fig. 2 is electricity of the water circulating pump shown in FIG. 1 with switching control circuit in cooling blower frequency conversion one drag two control circuit
Road schematic diagram；
Fig. 3 is circuit theory of the water circulating pump with Frequency Converter Control circuit in cooling blower frequency conversion one drag two control circuit
Figure；
Fig. 4 is circuit of the water circulating pump with motor protector control loop in cooling blower frequency conversion one drag two control circuit
Schematic diagram；
Fig. 5 is circuit diagram of the water circulating pump with signal feedback loop in cooling blower frequency conversion one drag two control circuit.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, electricity of the water circulating pump provided in an embodiment of the present invention with cooling blower frequency conversion one drag two control circuit
Road schematic diagram, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
A kind of water circulating pump band cooling blower frequency conversion one drag two control circuit, comprising: switching control circuit 400 and major loop
100, switching control circuit 400 is used to generate switching signal according to operational order；The power input and alternating current of major loop 100
Source connection, each power output end of major loop 100 are cold with first circulation water pump 210, second circulation water pump 220, first respectively
But blower 310 and the connection of the second cooling blower 320, major loop 100 are used for according to switching signal to first circulation water pump 210
Powered on the first cooling blower 310, and to second circulation water pump 220 and the second cooling blower 320 power between switch.
It should be understood that the first cooling blower 310 is cooling blower corresponding with first circulation water pump 210, the second cooling blower
320 be cooling blower corresponding with second circulation water pump 220, and in the present embodiment, major loop 100 according to switching signal for existing
It is powered on to first circulation water pump 210 and the first cooling blower 310, and gives second circulation water pump 220 and the second cooling blower 320
Switch between powering on, i.e., first circulation water pump 210 and the first cooling blower 310 are linkage, second circulation water pump 220 and second
Cooling blower 320 is linkage.
Water circulating pump band cooling blower frequency conversion one drag two control circuit in the present embodiment, by the way that switching control circuit is added
400 and major loop 100, realizing major loop 100 can be according to the switching signal in switching control circuit 400 to first circulation water
Pump 210 and first cooling blower 310 power on, and to second circulation water pump 220 and the second cooling blower 320 power between cut
Change, that is, realize can by switching control circuit 400 switch water circulating pump while, also achieve and recycled in handoff procedure
Water pump with its corresponding to cooling blower can link, avoid in handoff procedure water circulating pump as can not with its corresponding to
Cooling blower linkage solves traditional to cause that cooling velocity is slow, cooling effect is unobvious and the higher problem of energy consumption
There are switching efficiencies in technical solution low, water circulating pump can not link with the cooling blower corresponding to it and energy consumption is high asks
Topic.
Referring to Fig. 1, in one embodiment, the first bus 00, the second bus 01, main circuit breaker QF, current transformer
MAT, frequency converter VF, motor protector BH, the first circuit breaker Q F1, the second circuit breaker Q F2, third circuit breaker Q F3, the 4th are broken
Road device QF4, first contactor, second contactor, third contactor and the 4th contactor；
First bus 00 is connect as the power input of major loop 100 with AC power source, the input terminal of main circuit breaker QF
It is connect with the first bus 00, input of the output end of main circuit breaker QF as control power supply L11 and the second bus 01, frequency converter VF
End connection, the output end of frequency converter VF are connect with the first circuit breaker Q F1 and the second circuit breaker Q F2, current transformer MAT and second
Bus 01 couples, and the output end of current transformer MAT connect with motor protector BH, the input terminal of third circuit breaker Q F3 with
The input terminal of 4th circuit breaker Q F4 is connect with the second bus 01, the output end of the first circuit breaker Q F1 and the main touching of first contactor
The first end of point KM10 connects, and the first end of the main contacts KM20 of the output end and second contactor of the second circuit breaker Q F2 connects,
The first end of the main contacts KM30 of the output end and third contactor of third circuit breaker Q F3 connects, the output of the 4th circuit breaker Q F4
End is connected with the first end of the main contacts KM40 of the 4th contactor, and the second end of the main contacts KM10 of first contactor, which is used as, to be led back
First power output end and first circulation water pump 210 on road 100 connect, the second end conduct of the main contacts KM20 of second contactor
The second source output end and second circulation water pump 220 of major loop 100 connect, the second end of the main contacts KM30 of third contactor
It is connected as the third power output end of major loop 100 and the first cooling blower 310, the of the main contacts KM40 of the 4th contactor
Two ends are connected as the 4th power output end of major loop 100 and the second cooling blower 320.
It should be understood that current transformer MAT can select precision transformer；Under normal condition, main circuit breaker QF is always maintained at
"on" position, and water circulating pump band cooling blower frequency conversion one drag two control circuit is at work, it is necessary to first close the first breaker
QF1, the second circuit breaker Q F2, third circuit breaker Q F3 and the 4th circuit breaker Q F4；Frequency converter VF in the present embodiment is used
The frequency converter VF of FC302 series, motor protector BH use the motor protector BH of PMC-550M series, in other implementations
It, can also be using the frequency converter VF and/or motor protector BH of other series in example.
Major loop 100 in the present embodiment controls first circulation water pump 210 or the by the way that a frequency converter VF is only added
220 work of two-cycle pump, avoids and needs to control major cycle water pump respectively using two frequency converter VF in conventional solution
The problem of with spare water circulating pump to cause cost of investment excessively high and the idleness of equipment.
Referring to Fig. 2, in one embodiment, switching control circuit 400 includes: anti-overflow unit 410, indicator unit
420, frequency converter frequency switch method of remote signal unit 430, first switch unit 440, second switch unit 450, the first start and stop control
Unit 460 processed and the second start-up and shut-down control unit 470；The firewire that anti-overflow unit 410 passes through the second bus 01 and AC power source
L1 connection, indicator unit 420 are connect with the zero curve N of the output end of anti-overflow unit 410 and AC power source, frequency converter frequency letter
Number switch control unit 430 is connect with the zero curve N of the output end of anti-overflow unit 410 and AC power source, second switch unit 450
Connect with output end and DCS (Distributed Control System, the dcs) cabinet of anti-overflow unit 410
It connects, the first start-up and shut-down control unit 460 connects with first switch unit 440, second switch unit 450 and motor protector BH
It connects, the second start-up and shut-down control unit 470 connects with first switch unit 440, second switch unit 450 and motor protector BH
It connects；Anti-overflow unit 410 is used to then cut off alternating current when the electric current that the firewire L1 of AC power source is provided is greater than maximum preset value
The input channel of the firewire L1 in source；Indicator unit 420 is used to indicate first circulation water pump 210 and the first cooling blower 310, with
And the operating status of second circulation water pump 220 and the second cooling blower 320；Frequency converter frequency switch method of remote signal unit 430 is used
In the control signal for the frequency signal switching for generating frequency converter VF；The output end of first switch unit 440 and anti-overflow unit 410
Connection, first switch unit 440 are used to instruct conducting or shutdown according to local operation；Second switch unit 450 is according to DCS cabinet
DCS operational order conducting or shutdown；First start-up and shut-down control unit 460 is used for according to first switch unit 440 or second
The on-off of switch unit 450 comes start and stop first circulation water pump 210 and the first cooling blower 310；Second start-up and shut-down control unit 470 is used
In cooling come start and stop second circulation water pump 220 and second according to the on-off of first switch unit 440 or second switch unit 450
Blower 320.
It should be understood that anti-overflow unit 410 can be automatically cut off the device of access when current is excessive and constituted by having, such as
Fuse；Letting off stream unit can also be made of switching tube, such as high-voltage three-pole pipe；In the present embodiment, maximum preset value is answered
The maximum current bearing value of each composition component lower than in actual circuit；Indicator unit 420 can be by multiple luminescent devices
It constitutes, each luminescent device is used to indicate the operating status of corresponding water circulating pump and cooling blower, and operating status includes work
State and halted state；Frequency converter frequency switch method of remote signal unit 430 can be by for the given of switching control frequency converter VF
The device of frequency signal input is constituted, such as relay etc.；First switch unit 440 can be set to local operation case by multiple
Mechanical switch composition, such as normally opened mechanical switch and its button and normally closed mechanical switch and its button；Second switch unit 450
It can be made of multiple passive contacts for being set to DCS cabinet；First start-up and shut-down control unit 460 and the second start-up and shut-down control unit 470
It can be formed and constituted by the device of control first contactor, second contactor, the on-off of third contactor and the 4th contactor.
Switching control circuit 400 in the present embodiment, by be added first switch unit 440, second switch unit 450,
First start-up and shut-down control unit 460 and the second start-up and shut-down control unit 470, realizing can be by local operation control and/or DCS
Operation controls to control first circulation water pump 210 and the first cooling blower 310 and second circulation water pump 220 and the second cooling
Switch operating between blower 320 realizes and various ways control mode can be used to switch first circulation water pump 210 and its right
Answer cooling blower and second circulation water pump 220 and its corresponding cooling blower；Show that first follows by the way that indicator unit 420 is added
The working condition of ring water pump 210, the first cooling blower 310, second circulation water pump 220 and the second cooling blower 320, convenient for using
Intuitively know in running order water circulating pump and cooling blower in family.
Referring to Fig. 2, in one embodiment, in switching control circuit 400:
Anti-overflow unit 410 includes first fuse FU1, the first end of first fuse FU1 and the firewire of AC power source
L1 connection, output end of the second end of first fuse FU1 as anti-overflow unit 410；
Indicator unit 420 includes the first indicator light HL1, the second indicator light HL2, third indicator light HL3, the 4th indicator light
HL4, the 5th indicator light HL5 and the 6th indicator light HL6, the first auxiliary contact KM11 of first contactor, first contactor
Second auxiliary contact KM12, the first auxiliary contact KM21 of second contactor and the second auxiliary contact of second contactor
The first of the first end of KM22, the second auxiliary contact KM12 of first contactor, the first auxiliary contact KM11 of first contactor
The first end of first auxiliary contact KM21 of end and second contactor is connected to the output end with anti-overflow unit 410 altogether, and first
The first end of second auxiliary contact KM22 of the second end and second contactor of the second auxiliary contact KM12 of contactor connects, the
The of the second end of second auxiliary contact KM22 of two contactors and the first end of the first indicator light HL1 and the 4th indicator light HL4
One end connection, the second end of the first auxiliary contact KM11 of first contactor and the first end and the five fingers of the second indicator light HL2
Show the first end connection of lamp HL5, the first of the second end of the first auxiliary contact KM21 of second contactor and third indicator light HL3
End is connected with the first end of the 6th indicator light HL6, the second end of the first indicator light HL1, the second end of the second indicator light HL2, the
Second end, the second end of the 4th indicator light HL4, the second end and the 6th indicator light of the 5th indicator light HL5 of three indicator light HL3
The second end of HL6 is connected to the zero curve N of AC power source altogether；
It should be understood that in this embodiment, the first auxiliary contact KM11 of first contactor is normally opened contact, first contactor
Second auxiliary contact KM12 is normally-closed contact, and the first auxiliary contact KM21 of second contactor is normally opened contact, second contactor
The second auxiliary contact KM22 be normally-closed contact, the first indicator light HL1, the second indicator light HL2 and third indicator light HL3 can be set
It is placed in power distribution cabinet or switchboard, in the present embodiment, in addition to particularly pointing out, the general default setting of remaining device is in power distribution cabinet
Or in switchboard；4th indicator light HL4, the 5th indicator light HL5 and the 6th indicator light HL6 may be disposed in control box,
In, the first indicator light HL1 and the 4th indicator light HL4 are off indicator light；Second indicator light HL2 and the 5th indicator light HL5 are
It is the run indicator of first circulation water pump 210 and the first cooling blower 310, i.e., when first circulation water pump 210 and the first cooling
When blower 310 is in running order, the second indicator light HL2 and the 5th indicator light HL5 bright light；Third indicator light HL3 and the 6th refers to
Showing lamp HL6 all is the run indicator of second circulation water pump 220 and the second cooling blower 320, i.e., when 220 He of second circulation water pump
When second cooling blower 320 is in running order, third indicator light HL3 and the 6th indicator light HL6 bright light.
Frequency converter frequency switch method of remote signal unit 430 includes the coil K of knob S and main intermediate relay, and knob S's is defeated
Enter end to connect with the output end of anti-overflow unit 410, the first end of the coil K of the output end of knob S and main intermediate relay connects
It connects, the zero curve N connection of the second end and AC power source of the coil K of main intermediate relay；It should be understood that knob S can open for rotation
It closes.
First switch unit 440 includes stop button SS1, the first start button SF1 and the second start button SF2, is stopped
Only the first end of button SS1 is connect by second switch unit 450 with the output end of anti-overflow unit 410, stop button SS1's
Second end is connect with the first end of the first end of the first start button SF1 and the second start button SF2；It should be understood that stop button
SS1, the first start button SF1 and the second start button SF2 can be the button switch for being set to control box, wherein stopping pressing
Button SS1 is normally closed push button switch, and the first start button SF1 and the second start button SF2 are normally open push button switch.
Second switch unit 450 includes the first passive contact D1, the second passive contact D2 and third passive contact D3, the
The first end of one passive contact D1 is connect with the output end of anti-overflow unit 410, the second end and stopping of the first passive contact D1
The first end of button SS1 connects, the first end and third passive contact of the second end of stop button SS1 and the second passive contact D2
The first end of D3 connects；It should be understood that the first passive contact D1, the second passive contact D2 and third passive contact D3 can be to set
It is placed in the passive contact of DCS cabinet, the first passive contact D1, the second passive contact D2 and third passive contact D3 are by DCS cabinet
Program instruction control, wherein the first passive contact D1 is normally closed passive contact, the second passive contact D2 and third passive contact D3
For normally opened passive contact.
The of first auxiliary contact K1 of the first start-up and shut-down control unit 460 including main intermediate relay, main intermediate relay
Three auxiliary contact K3, the first auxiliary contact KA11 of the first intermediate relay, the second intermediate relay the second auxiliary contact
KA22, the third auxiliary contact KM23 of second contactor, the coil KA1 of the first intermediate relay, first contactor coil KM1
And the first end and the second passive contact D2 of the coil KM3 of third contactor, the first auxiliary contact K1 of main intermediate relay
Second end connection, the second end of the first auxiliary contact K1 of main intermediate relay and the third auxiliary contact of main intermediate relay
The second end of K3 is connect with the first end of the second auxiliary contact KA22 of the second intermediate relay, and the second of the second intermediate relay
The coil KM3's of the first end and third contactor of the coil KA1 of the second end of auxiliary contact KA22 and the first intermediate relay
First end connection, the first end of the third auxiliary contact K3 of main intermediate relay are connected with the second end of the first start button SF1,
The first end of first auxiliary contact KA11 of the first intermediate relay is connect with the second end of stop button SS1, among first after
The first end of the third auxiliary contact KM23 of the second end and second contactor of first auxiliary contact KA11 of electric appliance connects, and second
The first end of the coil KM1 of the second end and first contactor of the third auxiliary contact KM23 of contactor connects, among first after
The of the coil KM3 of the second end of the coil KA1 of electric appliance, the second end of the coil KM1 of first contactor and third contactor
Two ends are connected to the first end D011 of the normally closed point of failure of motor protector BH altogether, the normally closed point of the failure of motor protector BH
The zero curve N connection of second end D012 and AC power source, the installation's power source endpoint of motor protector BH are connected to anti-overflow unit 410
Output end and AC power source zero curve N between；
Wherein, in the present embodiment, the first auxiliary contact K1 of main intermediate relay is normally opened contact, main intermediate relay
Third auxiliary contact K3 be normally-closed contact, the first auxiliary contact KA11 of the first intermediate relay is normally opened contact, in second
Between the second auxiliary contact KA22 of relay be normally-closed contact, the third auxiliary contact KM23 of second contactor is normally-closed contact.
The of second auxiliary contact K2 of the second start-up and shut-down control unit 470 including main intermediate relay, main intermediate relay
Four auxiliary contact K4, the first auxiliary contact KA21 of the second intermediate relay, the first intermediate relay the second auxiliary contact
KA12, the third auxiliary contact KM13 of first contactor, the coil KA2 of the second intermediate relay, second contactor coil KM2
And the 4th contactor coil KM4, the first end and third passive contact D3 of the second auxiliary contact K2 of main intermediate relay
Second end connection, the second end of the second auxiliary contact K2 of main intermediate relay and the 4th auxiliary contact of main intermediate relay
The second end of K4 is connect with the first end of the second auxiliary contact KA12 of the first intermediate relay, and the second of the first intermediate relay
The coil KM4's of the first end and the 4th contactor of the coil KA2 of the second end of auxiliary contact KA12 and the second intermediate relay
First end connection, the first end of the 4th auxiliary contact K4 of main intermediate relay are connected with the second end of the second start button SF2,
The first end of first auxiliary contact KA21 of the second intermediate relay is connect with the second end of stop button SS1, among second after
The first end of the third auxiliary contact KM13 of the second end and first contactor of first auxiliary contact KA21 of electric appliance connects, and first
The first end of the coil KM2 of the second end and second contactor of the third auxiliary contact KM13 of contactor connects, among second after
The of the coil KM4 of the second end of the coil KA2 of electric appliance, the second end of the coil KM2 of second contactor and the 4th contactor
Two ends are connected to the first end D011 of the normally closed point of failure of motor protector BH altogether, the normally closed point of the failure of motor protector BH
The zero curve N connection of second end D012 and AC power source, the installation's power source endpoint of motor protector BH are connected to anti-overflow unit 410
Output end and AC power source zero curve N between；
Wherein, the second auxiliary contact K2 of main intermediate relay is normally opened contact, the 4th auxiliary touching of main intermediate relay
Point K4 is normally-closed contact, and the first auxiliary contact KA21 of the second intermediate relay is normally opened contact, the of the first intermediate relay
Two auxiliary contact KA12 are normally-closed contact, and the third auxiliary contact KM13 of first contactor is normally-closed contact.
Switching control circuit 400 in the present embodiment can pass through first switch unit of the operation setting on control box
440 control the switching of first circulation water pump 210 and second circulation water pump 220 on the spot, can also be by operation setting in DCS cabinet
Second switch unit 450 automatically control the switching of first circulation water pump 210 and second circulation water pump 220.For the ease of reason
Solution, in conjunction with Fig. 2 and Fig. 3, the course of work for two ways of illustrating respectively is as follows:
One, when select local operation instruction be primary operational control instruction when, i.e., by control first switch unit 440
When:
Electric current passes sequentially through AC power source L1, first fuse FU1, the second auxiliary contact KM12 of first contactor,
Second auxiliary contact KM22 of two contactors lights the first indicator light HL1 and the 4th indicator light HL4, while motor protector BH
Installation's power source endpoint the end L obtain it is electric, motor protector BH start to work.Knob S is not closed at this time, main intermediate relay
Coil K can not obtain electric, and the 5th auxiliary contact K5 of main intermediate relay is disconnected, and the coil KA4 of the 4th intermediate relay can not be obtained
Electricity, the first auxiliary contact KA41 of the 4th intermediate relay are disconnected, and 12 feet of frequency converter VF and 29 feet disconnect, frequency converter default by
Potentiometer R given frequency signal.
When pressing the first start button SF1, electric current pass sequentially through first fuse FU1, the first passive contact D1, stop by
The second auxiliary touching of button SS1, the first start button SF1, the third auxiliary contact K3 of main intermediate relay, the second intermediate relay
Point KA22, motor protector BH the normally closed end point D011, D012 of failure make the coil KA1 and third of the first intermediate relay
The coil KM3 of contactor obtains electric actuation, while the coil KM1 of first contactor passes through the third auxiliary contact of second contactor
KM23 obtains electric actuation, the main contact KM10 of first contactor and the main contact KM30 closure of third contactor.Due to the first contact
4th auxiliary contact KM14 of device is closed, and frequency converter VF runs 18 foot of input terminal and 12 feet are connected, and frequency converter VF starting, first follows
Ring water pump 210 and the first cooling blower 310 corresponding to it start simultaneously.Due to the coil KA1 of the first intermediate relay obtain it is electric
After actuation, the first auxiliary contact of the first intermediate relay are closed to form holding circuit, even if unclamping the first start button SF1,
The coil of the coil KA1 and third contactor KM3 of first intermediate relay still keep being attracted, the main contact of first contactor
The main contact KM30 of KM10 and third contactor is remained closed, first circulation water pump 210 and the first cooling blower corresponding to it
310 continuous services.
When pressing the second start button SF2, electric current pass sequentially through first fuse FU1, the first passive contact D1, stop by
The second auxiliary touching of button SS1, the second start button SF2, the 4th auxiliary contact K4 of main intermediate relay, the first intermediate relay
Point KA12, motor protector BH the normally closed end point D011, D012 of failure make the coil KA2 and the 4th of the second intermediate relay
The coil KM4 of contactor obtains electric actuation, while the normally closed auxiliary touching of third that the coil KM2 of second contactor passes through first contactor
Point KM13 obtains electric actuation, the main contact KM20 of second contactor and the main contact KM40 closure of the 4th contactor.It connects due to second
4th auxiliary contact KM24 of tentaculum is closed, and frequency converter VF runs 18 foot of input terminal and 12 feet are connected, frequency converter VF starting, and second
Water circulating pump 220 and the second cooling blower 320 corresponding to it start simultaneously.Since the coil KA2 of the second intermediate relay is obtained
After electricity is attracted, the first auxiliary contact KA21 of the second intermediate relay is closed to form holding circuit, presses even if unclamping the second starting
Button SF2, the coil KM2 of second contactor and the coil KM4 of the 4th contactor still keep being attracted, the main contact of second contactor
The main contact KM40 of KM20 and the 4th contactor is remained closed, second circulation water pump 220 and the second cooling blower corresponding to it
320 continuous services.
It should be understood that in above-mentioned control process, due to the coil KA1 of the first intermediate relay and the coil of third contactor
Connected the second auxiliary contact KA22 of the second intermediate relay for the front end of KM3, and the front end of the coil KM1 of first contactor is gone here and there
The third auxiliary contact KM23 of second contactor, the coil KA2 of the second intermediate relay and the front end coil KM4 of the 4th contactor
The second auxiliary contact KA12 of the first intermediate relay is gone here and there, first contactor has been gone here and there in the front end coil KM2 of second contactor
Normally-closed contact KM13, so when the coil KM1 of the coil KA1 of the first intermediate relay and first contactor obtain electric actuation, the
The coil of the coil KA2 and the 4th contactor KM4 of two intermediate relays can not obtain electric actuation, when the coil of first contactor KM1
When obtaining electric actuation, the coil of second contactor KM2 can not obtain electric actuation, when the coil KA2 of the second intermediate relay and the 4th connects
When the coil of tentaculum KM4 obtains electric actuation, the coil KA1 of the first intermediate relay and the coil KM3 of third contactor can not obtain electric
It is attracted, when the coil KM2 of second contactor obtains electric actuation, the coil KM1 of first contactor can not obtain electric actuation, to realize
Electrical interlocks.In this control process, the first auxiliary contact K1 and the second auxiliary contact K2 of main intermediate relay are remained open,
Even if the second passive contact D2 or the passive D3 of third of DCS cabinet are preferentially closed, contactor coil can not be made to obtain electric, it can not be automatic
Start water circulating pump and cooling blower.
When pressing stop button SS1, the first intermediate relay of cutting, the second intermediate relay, first contactor, second are connect
The coil power of tentaculum, third contactor and the 4th contactor, at this point, whether first circulation water pump 210 and its corresponding to
The first cooling blower 310 work or second circulation water pump 220 and its corresponding to the second cooling blower 320 work, due to
Above-mentioned contactor main contacts disconnects, and water circulating pump and cooling blower can all stop running immediately.
Two, when selecting DCS operational order for primary operational control instruction, i.e., by control second switch unit 450 when:
Electric current passes sequentially through AC power source, first fuse FU1, the second auxiliary contact KM12 of first contactor, second
Second auxiliary contact KM22 of contactor lights the first indicator light HL1 and the 4th indicator light HL4, while motor protector BH
The end L obtains electric, motor protector BH start-up operation.Be closed knob S at this time, the coil K of main intermediate relay obtains electric actuation, it is main in
Between the first auxiliary contact K1 of relay, the second auxiliary contact K2 of main intermediate relay and main intermediate relay it is the 5th auxiliary
Contact K5 is helped to be closed, the third auxiliary contact K3 of main intermediate relay and the 4th auxiliary contact K4 of main intermediate relay are disconnected,
The coil KA4 of 4th intermediate relay obtains electric actuation, the first auxiliary contact KA41 closure of the 4th intermediate relay, frequency converter VF
12 feet and 29 feet connect, the 4-20mA frequency signal that frequency converter VF default choice is provided by DCS cabinet.
When the second passive contact D2 is closed, start first circulation water pump 210, electric current passes sequentially through first fuse FU1, the
One passive contact D1, stop button SS1, the second passive contact D2, the first auxiliary contact K1 of main intermediate relay, among second
Second auxiliary contact KA22 of relay, the normally closed end point D011, DO11 of failure of motor protector BH make among first after
The coil KA1 of the electric appliance and coil KM3 of third contactor obtains electric actuation, while the coil KM1 of first contactor connects by second
The third auxiliary contact KM23 of tentaculum obtains electric actuation, the main contact KM10 of first contactor and the main contact KM30 of third contactor
Closure.Since the 4th auxiliary contact KM14 of first contactor is closed, frequency converter VF runs 18 foot of input terminal and 12 feet are connected, and becomes
Frequency device VF starting, first circulation water pump 210 and the first cooling blower 310 corresponding to it start simultaneously.Due among first after
After the coil KA1 of electric appliance obtains electric actuation, the first auxiliary contact KA11 of the first intermediate relay is closed to form holding circuit, even if
Second passive contact D2 is disconnected, and the coil of the first intermediate relay KA1 and third contactor KM3 still keep being attracted, and first connects
The main contact KM10 of tentaculum and the main contact KM30 of third contactor are remained closed, first circulation water pump 210 and its corresponding to
First cooling blower, 310 continuous service.
When third passive contact D3 is closed, start second circulation water pump 220, electric current passes sequentially through first fuse FU1, the
One passive contact D1, stop button SS1, third passive contact D3, the second auxiliary contact K2 of main intermediate relay, among first
Second auxiliary contact KA12 of relay, the normally closed end point D011, DO11 of failure of motor protector BH make among second after
The coil KA2 of the electric appliance and coil KM4 of the 4th contactor obtains electric actuation, while the coil KM2 of second contactor connects by first
The third auxiliary contact KM13 of tentaculum obtains electric actuation, the main contact KM20 of second contactor and the main contact KM40 of the 4th contactor
Closure.Since the 4th auxiliary contact KM24 of second contactor is closed, frequency converter VF runs 18 foot of input terminal and 12 feet are connected, and becomes
Frequency device VF starting, second circulation water pump 220 and the second cooling blower 320 corresponding to it start simultaneously.Due among second after
After the coil KA2 of electric appliance obtains electric actuation, the first auxiliary contact KA21 of the second intermediate relay is closed to form holding circuit, even if
Third passive contact D3 is disconnected, and the coil KA2 of the second intermediate relay and the coil KM4 of the 4th contactor still keep being attracted,
The main contact KM20 of second contactor and the main contact KM40 of the 4th contactor are remained closed, second circulation water pump 220 and its institute
Corresponding second cooling blower, 320 continuous service.
It should be understood that in above-mentioned control process, due to the coil KA1 and third contactor KM3 of the first intermediate relay
Gone here and there the second auxiliary contact KA22 of the second intermediate relay for the front end of coil, and the coil front end of first contactor KM1 has gone here and there
Before the third auxiliary contact KM23 of two contactor KM2, the coil KA2 of the second intermediate relay and the coil KM4 of the 4th contactor
Gone here and there the second auxiliary contact KA12 of the first intermediate relay at end, and first contactor has been gone here and there in the front end coil KM2 of second contactor
The third auxiliary contact KM13 of KM1, thus when the first intermediate relay coil KA1 and first contactor coil KM1 obtain it is electric
When actuation, the coil KA2 of the second intermediate relay and the coil KM4 of the 4th contactor can not obtain electric actuation, work as first contactor
Coil KM1 when obtaining electric actuation, the coil KM2 of second contactor can not obtain electric actuation, as the coil KA2 of the second intermediate relay
When obtaining electric actuation with the coil KM4 of the 4th contactor, the coil KA1 of the first intermediate relay and the coil KM3 of third contactor
Electric actuation can not be obtained, when the coil KM2 of second contactor obtains electric actuation, the coil KM1 of first contactor can not obtain electric actuation,
To realize electrical interlocks.In this automatic control process, the third auxiliary contact K3 of main intermediate relay and main centre after
4th auxiliary contact K4 of electric appliance is remained open, even if the first start button SF1 or the second start button SF2 are preferentially closed,
Contactor coil cannot be made to obtain electric, water circulating pump and cooling blower can not be manually booted.
When the first passive contact D1 is disconnected, the first intermediate relay of cutting, the second intermediate relay, first contactor, the
The coil power of two contactors, third contactor and the 4th contactor, at this point, whether first circulation water pump 210 and its institute
The corresponding work of first cooling blower 310 or second circulation water pump 220 and the second cooling blower 320 work corresponding to it,
Since above-mentioned contactor main contacts disconnects, water circulating pump and cooling blower can all be stopped running immediately.
In both above mode, when the coil KM1 of first contactor obtains electric, the first auxiliary contact of first contactor
KM11 closure, first circulation water pump 210 are run, and the second indicator light HL2 and the 5th HL5 are lighted, otherwise are extinguished.Work as second contactor
Coil KM2 when obtaining electric, the first auxiliary contact KM21 closure of second contactor, second circulation water pump 220 is run, and third refers to
Show that lamp HL3 and the 6th indicator light HL6 are lighted, otherwise extinguishes.
In one embodiment, further includes: Frequency Converter Control circuit 500, motor protector BH control loop 600 and
Signal feedback loop 700, Frequency Converter Control circuit 500 are connect with frequency converter VF and DCS cabinet, motor protector BH control loop
It is connect with motor protector BH, DCS cabinet, signal feedback loop 700 is connect with DCS cabinet, and frequency control circuit becomes for start and stop
Frequency device VF, switching are input to the given frequency of frequency conversion, feed back the current signal of frequency converter VF to DCS cabinet and to frequency converter VF
Indicating fault；Motor protector BH control loop is for acquiring remote control signal, the fault-signal of main circuit breaker QF, main open circuit
The enabling signal of the switching signal of device QF, the enabling signal of first circulation water pump 210 and second circulation water pump 220；Signal is anti-
Road 700 is fed back to for feeding back the enabling signal, the enabling signal of second circulation water pump 220, the first cooling of first circulation water pump 210
The enabling signal of blower 310, the fault-signal of motor protector BH, far controls signal at the enabling signal of second cooling blower 320
And the fault-signal of frequency converter VF gives DCS cabinet.
Referring to Fig. 3, in one embodiment, Frequency Converter Control circuit 500 includes: that start and stop unit 510, given frequency are cut
Change unit 520, current signal feedback unit 530 and fault warning unit 540, the first of start and stop unit 510 and frequency converter VF
Operation input anode (12 foot), frequency converter VF first operation input negative terminal (18 foot) connection, start and stop unit 510 for start or
Person stops frequency converter VF；Each analog input port of given frequency switch unit 520 and frequency converter VF, DCS cabinet, control electricity
The zero curve N connection of source L11 and AC power source, given frequency switch unit 520 is for switching the given frequency for being input to frequency conversion；
Current signal unit is connect with each analog output end of frequency converter VF and DSC cabinet, and current signal unit is used for frequency converter
The current signal of VF is fed back to DCS cabinet；Fault warning unit 540 is connect with the zero curve N of control power supply L11 and AC power source,
Fault warning unit 540 is used to issue instruction when frequency converter VF failure.
It should be understood that start and stop unit 510 can be by device associated with 210 start and stop of first circulation water pump, and with second
The associated device of 220 start and stop of water circulating pump is constituted, such as the auxiliary contact of first contactor and the auxiliary of second contactor are touched
Point；Given frequency switch unit 520 is related to the frequency converter frequency switch method of remote signal unit 430 in switching control circuit 400
Connection, the given frequency for being input to frequency conversion can be the given fixed frequency of live hardware or the frequency by software set in DCS cabinet
Rate；The current signal of current signal unit feedback inverter VF is to DCS cabinet, and DCS cabinet is according to current signal conversion frequency converter VF's
Output frequency, and then adjust the given frequency input control to frequency converter VF；Fault warning unit 540 can be by frequency converter VF's
Fault contact, relay and luminescent device composition.
It realizes by the way that start and stop unit 510 is added and works as first circulation water pump in Frequency Converter Control circuit 500 in the present embodiment
210 or second circulation water pump 220 start when simultaneously start frequency converter VF, avoid first circulation water pump 210 and second circulation
Water pump 220 does not work down, error starting frequency converter VF, to cause unnecessary energy consumption；It is single by the way that given frequency switching is added
Member 520 so as to adjust the given frequency for being input to frequency conversion and then realizes the output frequency of adjustment frequency converter VF, to reach change the
The purpose of the revolving speed of one water circulating pump 210 and second circulation water pump 220；It is anti-in time by the way that current signal feedback unit 530 is added
The current signal of frequency converter VF is presented to adjust the control to frequency converter VF in real time；By the way that fault warning unit 540 is added, work as change
Instruction is issued when frequency device VF failure, and user is reminded to repair to frequency converter VF and avoid the error starting by force to frequency converter VF.
Referring to Fig. 3, in one embodiment, in Frequency Converter Control circuit 500:
Start and stop unit 510 includes the 4th auxiliary contact KM14 of first contactor and the 4th auxiliary contact of second contactor
The first of 4th auxiliary contact KM24 of the first end and second contactor of KM24, the 4th auxiliary contact KM14 of first contactor
The first operation input negative terminal (18 foot) with frequency converter VF is held to connect, the second end of the 4th auxiliary contact KM14 of first contactor
It is connect with the second end of the 4th auxiliary contact KM24 of second contactor with the first operation input anode (12 foot) of frequency converter VF；
Wherein, the 4th auxiliary contact KM14 of first contactor is normally opened contact, the 4th auxiliary contact of second contactor
KM24 is normally opened contact.
Given frequency switch unit 520 includes the first auxiliary contact KA41, the main intermediate relay of the 4th intermediate relay
The 5th auxiliary contact K5, the 4th intermediate relay coil KA4 and potentiometer R, the 4th intermediate relay first auxiliary
The first end of contact KA41 is connect with the On-off signal end (29 foot) of frequency converter VF, the first auxiliary touching of the 4th intermediate relay
The second end of point KA41 is connect with the first operation input anode (12 foot) of frequency converter VF, the first end and frequency converter of potentiometer R
The analog quantity power end (+10V) of VF connects, the control terminal of potentiometer R and the first analog input anode AI1+ of frequency converter VF
Connection, the second end of potentiometer R are connect with the first analog input negative terminal AI1- of frequency converter VF, the second simulation of frequency converter VF
The second analog input negative terminal AI2- of amount input anode AI2+ and frequency converter VF is connect with DCS cabinet, and the of main intermediate relay
The first end of five auxiliary contact K5 with control power supply L11 connect, the second end of the 5th auxiliary contact K5 of main intermediate relay and
The first end of the coil KA4 of 4th intermediate relay connects, and the second end and zero curve N of the coil KA4 of the 4th intermediate relay connects
It connects；Wherein, the first auxiliary contact KA41 of the 4th intermediate relay is normally opened contact, the 5th auxiliary contact of main intermediate relay
K5 is normally opened contact.
Current signal feedback unit 530 includes revolution counter P, and revolution counter P is connected to the first analog output of frequency converter VF
Between positive and negative terminals A01+, A01- at end, positive and negative terminals A02+, A02- and the DCS at the second analog output end of frequency converter VF
Cabinet connection；
The failure normally opened contact VFB of fault warning unit 540 including frequency converter VF, third intermediate relay coil KA3,
The failure normally opened contact VFB's of first auxiliary contact KA31 of third intermediate relay and the 7th indicator light HL7, frequency converter VF
The first end of first auxiliary contact KA31 of first end and third intermediate relay is connect with control power supply L11, frequency converter VF's
The first end of the coil KA3 of the second end and third intermediate relay of failure normally opened contact VFB is connect, third intermediate relay
The second end of first auxiliary contact KA31 is connect with the first end of the 7th indicator light HL7, the coil KA3's of third intermediate relay
The zero curve N connection of the second end and AC power source of second end and the 7th indicator light HL7；Wherein, the first of third intermediate relay
Auxiliary contact KA31 is normally opened contact.
It should be understood that in order to avoid damaging device due to overcurrent in circuit, it can be in control power supply L11 and Frequency Converter Control
It connects between circuit 500 fuse, second fuse FU2 as illustrated in the drawing.
When frequency converter VF detects internal fault, fault contact VFB closure, electric current passes sequentially through second fuse
FU2, frequency converter VF fault contact VFB make the coil KA3 of third intermediate relay obtain electric actuation, third intermediate relay
The first auxiliary contact KA31 closure, the 7th indicator light HL7 is lighted, after Failure elimination, the 7th indicator light HL7 extinguish.Frequency converter
First analog output end AO1+, AO1- of VF gives revolution counter P, the second mould of frequency converter VF for exporting 4-20mA current signal
Analog quantity output terminals A O2+, AO2- gives frequency feedback to DCS cabinet for exporting 4-20mA current signal.
Referring to Fig. 4, in one embodiment, motor protector BH control loop includes:
The failure normally opened contact QFB of main circuit breaker QF, the normally opened auxiliary contact QFF of main circuit breaker QF, first contactor
5th auxiliary contact KM15, the 5th auxiliary contact KM25 of second contactor and the 6th auxiliary contact of main intermediate relay
The first end of K6, the 6th auxiliary contact K6 of main intermediate relay, the first end of the failure normally opened contact QFB of main circuit breaker QF,
The first end of the normally opened auxiliary contact QFF of main circuit breaker QF, the first end of the 5th auxiliary contact KM15 of first contactor and
The first end of 5th auxiliary contact KM25 of second contactor is connected to the common end DIC of motor protector BH altogether, main centre after
The second end of 6th auxiliary contact K6 of electric appliance is connected to the first switch amount input terminal DI1 of motor protector BH, main circuit breaker
The second end of the failure normally opened contact QFB of QF is connected to second switch amount input terminal DI2, the main circuit breaker QF of motor protector BH
The second end of normally opened auxiliary contact QFF be connected to the third On-off signal end DI3 of motor protector BH, first contactor
The second end of 5th auxiliary contact KM25 of the second end and second contactor of the 5th auxiliary contact KM15 is connected to motor guarantor altogether
Protect the 4th On-off signal end DI4 of device BH, analog output end A0+, A0- and DCS cabinet connection of motor protector BH, electricity
Communication signal output end D+, D- and SH of motivation protector BH is connect with host computer.
Wherein, the 5th auxiliary contact KM15 of first contactor, second contactor the 5th auxiliary contact KM25 and master
6th auxiliary contact K6 of intermediate relay is all normally opened contact；Communication signal output end D+, D- of motor protector BH with
And SH can be communicated to connect by RS485 interface and host computer.
The first switch amount input terminal DI1 of motor protector BH, second switch amount input terminal DI2, third switching value are defeated
Enter to hold DI3 and the 4th On-off signal end end DI4 to be respectively connected to the remote of the 6th auxiliary contact K6 offer of main intermediate relay
Control signal, alarm signal, the normally opened auxiliary of main incoming breaker QF that the failure normally opened contact QFB of main incoming breaker QF is provided
Switching signal, the 5th auxiliary contact KM15 of first contactor and the 5th auxiliary contact of second contactor that contact QFF is provided
KM25 provide starting run signal, motor protector BH will above-mentioned collected signal pass through analog output end AO+,
AO- is conveyed to DCS cabinet, is conveyed to host computer by communication signal output end D+, D-, SH.
Referring to Fig. 5, in one embodiment, signal feedback loop 700 includes:
The 6th auxiliary contact KM26, the third contactor of 6th auxiliary contact KM16 of first contactor, second contactor
The first auxiliary contact KM31, the first auxiliary contact KM41 of the 4th contactor, main intermediate relay the 7th auxiliary contact K7,
First auxiliary contact KA31 of third intermediate relay and the failure normally opened contact of motor protector BH, first contactor
The first end of 6th auxiliary contact KM16, the first end of the 6th auxiliary contact KM26 of second contactor, third contactor
The first end of one auxiliary contact KM31, the first end of the first auxiliary contact KM41 of the 4th contactor, main intermediate relay
First end, the first end and motor protector of the first auxiliary contact KA31 of third intermediate relay of seven auxiliary contact K7
The first end D021 of the failure normally opened contact of BH with respectively with the DI of DCS cabinet (Digital Input, digital quantity input) module
The connection of each input terminal, the 6th auxiliary contact of the second end of the 6th auxiliary contact KM16 of first contactor, second contactor
The second end of KM26, the second end of the first auxiliary contact KM31 of third contactor, the 4th contactor the first auxiliary contact
First auxiliary touching of the second end of KM41, the second end of the 7th auxiliary contact K7 of main intermediate relay, third intermediate relay
The DI module of the second end D022 and DCS cabinet of the failure normally opened contact of the second end and motor protector BH of point KA31 is public
End connection.
Wherein, the 6th auxiliary contact KM16, the 6th auxiliary contact KM26 of second contactor of first contactor, third connect
First auxiliary contact KM31 of tentaculum, the first auxiliary contact KM41 of the 4th contactor, main intermediate relay seven auxiliary contact
First auxiliary contact KA31 of K7 and third intermediate relay is all normally opened contact.
It should be understood that the 7th auxiliary contact K7 of main intermediate relay is used for feedback control client information, it is in conjunction with Fig. 2 it is found that main
The coil K and knob S of intermediate relay are arranged in series, and when knob S is disconnected, the coil K of main intermediate relay must not be electric, thus
7th auxiliary contact K7 of main intermediate relay is disconnected, and is defaulted as scene at this time and is controlled on the spot by control box, i.e., control terminal is
Control box；When knob S closure, the coil K of main intermediate relay obtains electric, thus the 7th auxiliary contact K7 of main intermediate relay
Closure, at this time remotely to be controlled by DCS cabinet, i.e., control terminal is DCS cabinet.
In the present embodiment, by the way that the 6th auxiliary contact KM16 of first contactor, the 6th auxiliary of second contactor is added
Contact KM26, the first auxiliary contact KM31 of third contactor, the first auxiliary contact KM41 of the 4th contactor, main intermediate relay
The failure of 7th auxiliary contact K7 of device, the first auxiliary contact KA31 of third intermediate relay and motor protector BH are normal
Open contact, realize by first circulation water pump 210, second circulation water pump 220, the first cooling blower 310, the second cooling blower 320,
The malfunction Real-time Feedback of the malfunction of motor protector BH, control client information and frequency converter VF is into DCS cabinet.
The second aspect of the embodiment of the present invention provides a kind of water circulating pump band cooling blower frequency conversion one drag two control system,
Include: first circulation water pump 210, second circulation water pump 220, the first cooling blower 310, the second cooling blower 320, DCS cabinet with
And the water circulating pump band cooling blower frequency conversion one drag two control circuit of the first aspect such as the embodiment of the present invention.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of water circulating pump band cooling blower frequency conversion one drag two control circuit characterized by comprising
Switching control circuit, the switching control circuit are used to generate switching signal according to operational order；With
The power input of major loop, the major loop is connect with AC power source, each power output end point of the major loop
It is not connect with first circulation water pump, second circulation water pump, the first cooling blower and the second cooling blower, the major loop is used for
It is powered on according to the switching signal to the first circulation water pump and first cooling blower, and gives the second circulation
Water pump and second cooling blower switch between powering on.
2. water circulating pump band cooling blower frequency conversion one drag two control circuit as described in claim 1, which is characterized in that the master
Circuit includes:
First bus, the second bus, main circuit breaker, current transformer, frequency converter, motor protector, the first breaker, second
Breaker, third breaker, the 4th breaker, first contactor, second contactor, third contactor and the 4th contactor；
First bus is connect with the AC power source, and the input terminal of the main circuit breaker is connect with first bus, institute
The output end for stating main circuit breaker is connect as control power supply with the input terminal of second bus, the frequency converter, the frequency conversion
The output end of device is connect with first breaker and second breaker, the current transformer and the second bus coupling
It connects, the output end of the current transformer is connected with the motor protector, the input terminal and the 4th of the third breaker
The input terminal of breaker is connect with second bus, the output end of first breaker and the main touching of the first contactor
The first end connection of point, the output end of second breaker are connected with the first end of the main contacts of the second contactor, institute
The output end for stating third breaker is connected with the first end of the main contacts of the third contactor, the output of the 4th breaker
End is connected with the first end of the main contacts of the 4th contactor, the second end of the main contacts of the first contactor and described the
The connection of one water circulating pump, the second end of the main contacts of the second contactor are connected with the second circulation water pump, the third
The second end of the main contacts of contactor is connected with first cooling blower, the second end of the main contacts of the 4th contactor and
The second cooling blower connection.
3. water circulating pump band cooling blower frequency conversion one drag two control circuit as claimed in claim 2, which is characterized in that described to cut
Changing control loop includes:
Anti-overflow unit, the anti-overflow unit are connect by second bus with the firewire of the AC power source, described anti-
Overcurrent unit is used to then cut off the input of the control power supply when the electric current that the control power supply provides is greater than maximum preset value
Access；
Indicator unit, the indicator unit are connect with the zero curve of the output end of anti-overflow unit and the AC power source, institute
State indicator unit be used to indicate the first circulation water pump and first cooling blower and the second circulation water pump and
The operating status of second cooling blower；
Frequency converter frequency switch method of remote signal unit, the frequency converter frequency switch method of remote signal unit and the anti-overflow unit
Output end connected with the zero curve of the AC power source, the frequency converter frequency switch method of remote signal unit is for generating the change
The control signal of the frequency signal switching of frequency device；
First switch unit, the first switch unit are connect with the output end of the anti-overflow unit, the first switch list
Member is for instructing conducting or shutdown according to local operation；
Second switch unit, the second switch unit are connect with the output end of the anti-overflow unit and DCS cabinet, and described second
Switch unit is connected or turns off according to the DCS operational order of the DCS cabinet；
First start-up and shut-down control unit, the first start-up and shut-down control unit and the first switch unit, the second switch unit
And motor protector connection, the first start-up and shut-down control unit are used for according to the first switch unit or described
The on-off of second switch unit comes first circulation water pump described in start and stop and first cooling blower；And
Second start-up and shut-down control unit, the second start-up and shut-down control unit and the first switch unit, the second switch unit
And motor protector connection, the second start-up and shut-down control unit are used for according to the first switch unit or described
The on-off of second switch unit comes second circulation water pump described in start and stop and second cooling blower.
4. water circulating pump band cooling blower frequency conversion one drag two control circuit as claimed in claim 2, which is characterized in that also wrap
It includes:
Frequency Converter Control circuit, the Frequency Converter Control circuit are connect with the frequency converter and the DCS cabinet, the frequency control
Circuit is input to the given frequency, current signal of the frequency converter is anti-of the frequency conversion for frequency converter described in start and stop, switching
It is fed to the DCS cabinet and the indicating fault to the frequency converter；
Motor protector control loop, the motor protector control loop and the motor protector, the DCS cabinet
Connection, the motor protector control loop are used to acquire the conjunction of remote control signal, the fault-signal of main circuit breaker, main circuit breaker
The enabling signal of lock signal, the enabling signal of first circulation water pump and second circulation water pump；And
Signal feedback loop, the signal feedback loop are connect with the DCS cabinet, and the signal feedback loop is described for feeding back
The enabling signal of first circulation water pump, the enabling signal of the second circulation water pump, the enabling signal of first cooling blower,
The enabling signal of second cooling blower, the fault-signal of the motor protector, the remote control signal and the change
The fault-signal of frequency device gives the DCS cabinet.
5. water circulating pump band cooling blower frequency conversion one drag two control circuit as claimed in claim 3, which is characterized in that described
In switching control circuit:
The anti-overflow unit includes first fuse, and the firewire of the first end of the first fuse and the AC power source connects
It connects, output end of the second end of the first fuse as anti-overflow unit；
The indicator unit includes the first indicator light, the second indicator light, third indicator light, the 4th indicator light, the 5th indicator light
And the second auxiliary contact, described of the 6th indicator light, the first auxiliary contact of the first contactor, the first contactor
First auxiliary contact of second contactor and the second auxiliary contact of the second contactor, the second of the first contactor
The first of the first ends of first auxiliary contact of the first end of auxiliary contact, the first contactor and the second contactor
The first end of auxiliary contact is connected to the output end with the anti-overflow unit altogether, the second auxiliary contact of the first contactor
Second end is connect with the first end of the second auxiliary contact of the second contactor, the second auxiliary contact of the second contactor
Second end connect with the first end of the first end of first indicator light and the 4th indicator light, the first contactor
The second end of first auxiliary contact is connected with the first end of second indicator light with the first end of the 5th indicator light, described
The of the first end and the 6th indicator light of the second end of first auxiliary contact of second contactor and the third indicator light
One end connection, the second end of first indicator light, the second end of second indicator light, the third indicator light second
The second end at end, the second end of the 4th indicator light, the second end of the 5th indicator light and the 6th indicator light is total
It is connected to the zero curve of the AC power source；
The frequency converter frequency switch method of remote signal unit includes the coil of knob and main intermediate relay, the input of the knob
End is connect with the output end of the anti-overflow unit, and the first of the coil of the output end of the knob and the main intermediate relay
End connection, the second end of the coil of the main intermediate relay are connect with the zero curve of the AC power source；
The first switch unit includes stop button, the first start button and the second start button, the stop button
First end is connect by the second switch unit with the output end of the anti-overflow unit, the second end of the stop button and
The first end of first start button is connected with the first end of second start button；
The second switch unit includes the first passive contact, the second passive contact and third passive contact, first nothing
The first end of source contact is connect with the output end of the anti-overflow unit, the second end and the stopping of first passive contact
The first end of button connects, and the second end of the stop button and the first end of second passive contact and the third are passive
The first end of contact connects；
The first start-up and shut-down control unit includes the first auxiliary contact of the main intermediate relay, the main intermediate relay
Third auxiliary contact, the first auxiliary contact of the first intermediate relay, the second auxiliary contact of the second intermediate relay, described
The third auxiliary contact of two contactors, the coil of first intermediate relay, the coil of the first contactor and described
The of the coil of third contactor, the first end of the first auxiliary contact of the main intermediate relay and second passive contact
The third of the connection of two ends, the second end of the first auxiliary contact of the main intermediate relay and the main intermediate relay assists touching
The second end of point is connect with the first end of the second auxiliary contact of second intermediate relay, second intermediate relay
The first end of the coil of the second end of second auxiliary contact and first intermediate relay and the coil of the third contactor
First end connection, the second end of the first end of the third auxiliary contact of the main intermediate relay and first start button
Connection, the first end of the first auxiliary contact of first intermediate relay is connect with the second end of the stop button, described
The first end of the third auxiliary contact of the second end and second contactor of first auxiliary contact of the first intermediate relay connects
It connects, the second end of the third auxiliary contact of the second contactor is connect with the first end of the coil of the first contactor, institute
State the second end of the coil of the first intermediate relay, the second end of the coil of the first contactor and the third contactor
Coil second end be connected to altogether the motor protector the normally closed point of failure first end, the event of the motor protector
The second end for hindering normally closed point is connect with the zero curve of the AC power source, and the installation's power source endpoint of the motor protector is connected to institute
It states between the output end of anti-overflow unit and the zero curve of the AC power source；
The second start-up and shut-down control unit includes the second auxiliary contact of the main intermediate relay, the main intermediate relay
Second auxiliary touching of the 4th auxiliary contact, the first auxiliary contact of second intermediate relay, first intermediate relay
Point, the third auxiliary contact of the first contactor, the coil of second intermediate relay, the second contactor coil
And the coil of the 4th contactor, the first end and the third of the second auxiliary contact of the main intermediate relay are passive
The second end of contact connects, and the of the second end of the second auxiliary contact of the main intermediate relay and the main intermediate relay
The second end of four auxiliary contact is connect with the first end of the second auxiliary contact of first intermediate relay, among described first
The second end of second auxiliary contact of relay is contacted with the first end of the coil of second intermediate relay and the described 4th
The first end of the coil of device connects, the first end and second start button of the 4th auxiliary contact of the main intermediate relay
Second end connection, the second end of the first ends of the first auxiliary contact of second intermediate relay and the stop button connects
It connects, the of the third auxiliary contact of the second end and first contactor of the first auxiliary contact of second intermediate relay
The first end of one end connection, the coil of the second end and second contactor of the third auxiliary contact of the first contactor connects
It connects, second end, the second end of the coil of the second contactor and the described 4th of the coil of second intermediate relay
The second end of the coil of contactor is connected to the first end of the normally closed point of failure of the motor protector, the motor protection altogether
The second end of the normally closed point of the failure of device is connect with the zero curve of the AC power source, the installation's power source endpoint of the motor protector
It is connected between the output end of the anti-overflow unit and the zero curve of the AC power source.
6. water circulating pump band cooling blower frequency conversion one drag two control circuit as claimed in claim 4, which is characterized in that the change
Frequency device control loop includes:
First operation of the first operation input anode, the frequency converter of start and stop unit, the start and stop unit and the frequency converter
Input negative terminal connection, the start and stop unit is for starting or stopping the frequency converter；
Each analog input port of given frequency switch unit, the given frequency switch unit and the frequency converter, institute
The zero curve connection of DCS cabinet, the control power supply and the AC power source is stated, the given frequency switch unit is defeated for switching
Enter the given frequency to the frequency conversion；
Each analog output end of current signal feedback unit, the current signal unit and the frequency converter and the DSC
Cabinet connection, the current signal unit are used for the current signal feedback of the frequency converter to the DCS cabinet；And
Fault warning unit, the fault warning unit are connect with the zero curve of the control power supply and the AC power source, institute
Fault warning unit is stated for issuing instruction when the frequency converter failure.
7. water circulating pump band cooling blower frequency conversion one drag two control circuit as claimed in claim 6, which is characterized in that the change
In frequency device control loop:
The start and stop unit includes the 4th auxiliary contact of the first contactor and the 4th auxiliary touching of the second contactor
Point, the first end of the 4th auxiliary contact of the first end and second contactor of the 4th auxiliary contact of the first contactor
It is connect with the first of the frequency converter the operation input negative terminal, the second end of the 4th auxiliary contact of the first contactor and described
The second end of 4th auxiliary contact of second contactor is connect with the first operation input anode of the frequency converter；
The given frequency switch unit include the first auxiliary contact of the 4th intermediate relay, the main intermediate relay
The coil and potentiometer of five auxiliary contact, the 4th intermediate relay, the first auxiliary touching of the 4th intermediate relay
The first end of point is connect with the On-off signal end of the frequency converter, and the of the first auxiliary contact of the 4th intermediate relay
Two ends are connect with the first operation input anode of the frequency converter, the analog quantity of the first end of the potentiometer and the frequency converter
Power end connection, the control terminal of the potentiometer are connect with the first analog input anode of the frequency converter, the potentiometer
Second end connect with the first analog input negative terminal of the frequency converter, the second analog input anode of the frequency converter and
Second analog input negative terminal of frequency converter is connect with the DCS cabinet, and the of the 5th auxiliary contact of the main intermediate relay
One end is connect with the control power supply, among the second end and the described 4th of the 5th auxiliary contact of the main intermediate relay after
The first end of the coil of electric appliance connects, and the second end of the coil of the 4th intermediate relay is connect with the zero curve；
The current signal feedback unit includes revolution counter, and the revolution counter is connected to the first analog output of the frequency converter
Between the positive and negative terminals at end, the positive and negative terminals at the second analog output end of the frequency converter are connect with the DCS cabinet；
The fault warning unit includes the failure normally opened contact of the frequency converter, the coil of third intermediate relay, described
The first auxiliary contact and the 7th indicator light of three intermediate relays, the first end of the failure normally opened contact of the frequency converter and institute
The first end for stating the first auxiliary contact of third intermediate relay is connect with the control power supply, and the failure of the frequency converter is normally opened
The second end of contact is connect with the first end of the coil of the third intermediate relay, and the first of the third intermediate relay is auxiliary
Help the second end of contact and the first end of the 7th indicator light to connect, the second end of the coil of the third intermediate relay and
The second end of 7th indicator light is connect with the zero curve of the AC power source.
8. water circulating pump band cooling blower frequency conversion one drag two control circuit as claimed in claim 4, which is characterized in that the electricity
Motivation protector control loop includes:
The failure normally opened contact of the main circuit breaker, the normally opened auxiliary contact of the main circuit breaker, the first contactor
6th auxiliary contact of five auxiliary contact, the 5th auxiliary contact of the second contactor and the main intermediate relay, institute
State the first end of the 6th auxiliary contact of the main intermediate relay, first end of the failure normally opened contact of the main circuit breaker, described
First end, the first end of the 5th auxiliary contact of the first contactor and described of the normally opened auxiliary contact of main circuit breaker
The first end of 5th auxiliary contact of two contactors is connected to the common end of the motor protector, the main intermediate relay altogether
The second end of the 6th auxiliary contact be connected to the first switch amount input terminal of the motor protector, the event of the main circuit breaker
Barrier normally opened contact the second end be connected to the second switch amount input terminal of the motor protector, the main circuit breaker it is normally opened auxiliary
The second end of contact is helped to be connected to the 5th auxiliary at the third On-off signal end of the motor protector, the first contactor
The second end of 5th auxiliary contact of the second end of contact and the second contactor is connected to the of the motor protector altogether
Four On-off signal ends, the analog output end of the motor protector are connect with the DCS cabinet, the motor protector
Communication signal output end connect with host computer.
9. water circulating pump band cooling blower frequency conversion one drag two control circuit as claimed in claim 4, which is characterized in that the letter
Number feedback loop includes:
6th auxiliary contact of the first contactor, the 6th auxiliary contact of the second contactor, the third contactor
The first auxiliary contact, the 4th contactor the first auxiliary contact, the 7th auxiliary contact of the main intermediate relay, institute
State the first auxiliary contact of third intermediate relay and the failure normally opened contact of the motor protector, first contact
First end, the first end of the 6th auxiliary contact of the second contactor, the third contactor of 6th auxiliary contact of device
The first ends of the first auxiliary contact, the first end of the first auxiliary contact of the 4th contactor, the main intermediate relay
The first ends of the 7th auxiliary contact, the third intermediate relay the first auxiliary contact first end and the motor
The first end of the failure normally opened contact of protector is connect with each input terminal of the DI module of the DCS cabinet respectively, and described first
Second end, second end, the third of the 6th auxiliary contact of the second contactor of 6th auxiliary contact of contactor connect
The second end of first auxiliary contact of tentaculum, the second end of the first auxiliary contact of the 4th contactor, the main centre after
Second end, the second end of the first auxiliary contact of the third intermediate relay and the electricity of 7th auxiliary contact of electric appliance
The second end of the failure normally opened contact of motivation protector is connect with the DI module common end of the DCS cabinet.
10. a kind of water circulating pump band cooling blower frequency conversion one drag two control system characterized by comprising
First circulation water pump；
Second circulation water pump；
First cooling blower；
Second cooling blower；
DCS cabinet；And
Water circulating pump band cooling blower frequency conversion one drag two control circuit as described in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910542747.2A CN110259675B (en) | 2019-06-21 | 2019-06-21 | Variable-frequency one-to-two control circuit and system for circulating water pump with cooling fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910542747.2A CN110259675B (en) | 2019-06-21 | 2019-06-21 | Variable-frequency one-to-two control circuit and system for circulating water pump with cooling fan |
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| CN110259675B CN110259675B (en) | 2024-06-11 |
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| CN201910542747.2A Active CN110259675B (en) | 2019-06-21 | 2019-06-21 | Variable-frequency one-to-two control circuit and system for circulating water pump with cooling fan |
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| CN110541838A (en) * | 2019-10-10 | 2019-12-06 | 淮北矿业股份有限公司 | intelligent fan control device |
| CN112332710A (en) * | 2020-10-29 | 2021-02-05 | 中石化四机石油机械有限公司 | Variable frequency motor linkage control circuit of sand conveying device |
| CN118434109A (en) * | 2024-07-05 | 2024-08-02 | 中船赛思亿(无锡)电气科技有限公司 | Frequency converter cooling system for ship shaft belt power generation |
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| CN110259675B (en) | 2024-06-11 |
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