CN109639213A - A kind of blower variable frequency device fault secure circuit, method and its Distributed Control System - Google Patents
A kind of blower variable frequency device fault secure circuit, method and its Distributed Control System Download PDFInfo
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- CN109639213A CN109639213A CN201811447731.5A CN201811447731A CN109639213A CN 109639213 A CN109639213 A CN 109639213A CN 201811447731 A CN201811447731 A CN 201811447731A CN 109639213 A CN109639213 A CN 109639213A
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- air blower
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Classifications
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- 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
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Multiple Motors (AREA)
Abstract
The present invention relates to coke-stove gas processing technology fields; more particularly to a kind of blower variable frequency device fault secure circuit and its Distributed Control System; the protection circuit includes the first driving circuit, the second driving circuit, the first protection circuit and the second protection circuit, and first driving circuit includes the power supply being sequentially connected in series, the first frequency converter, first switch module and the first air blower；Second driving circuit includes the power supply being sequentially connected in series, the second frequency converter, second switch module and the second air blower；First protection circuit include successively with the concatenated third switch module of first air blower and protection power source；Second protection circuit include successively with concatenated 4th switch module of the second air blower and the protection power source；In frequency converter failure, the conducting first or second protects branch, continues as air blower and provides the working frequency of corresponding power supply and standard, prevents from leading to safety accident in frequency converter failure.
Description
Technical field
The present invention relates to coke-stove gas processing technology fields, and in particular to a kind of blower variable frequency device fault secure circuit,
Method and its Distributed Control System.
Background technique
During coke-stove gas is coking, obtained fuel gas while output coke and tar product is
Make important byproduct in process of coking.The important equipment of coke-stove gas processing first is that air blower, drum cooling system is by two drums
Air-cooler and the independent frequency conversion system composition that complements one another.Under normal production scenarios, the raw coke oven gas amount that coke oven generates is
60000NM3The raw coke oven gas of/h or so, generation are sucked out by air blower.
Every year because frequency converter failure, power supply system voltage dip cause frequency converter caused by low-voltage to shut down, about 5 times
Left and right.Running air blower because have a power failure or frequency conversion failure it is out of service after, collecting main pressure moment increases at the top of coke oven, causes
Leaking of Raw Gas From Coke-oven seriously affects the progress normally produced so that production large area be caused to stop production.It is big that standby fan is enabled every time
30 minutes or so are about needed, in the process, about 30000NM3Left and right coke-stove gas is discharged into air, causes serious ring
Border pollution and economic loss.
The patent of Publication No. CN2735411Y provides a kind of frequency converter shunting device of boiler fan, specifically discloses
The shunting device includes frequency converter, entry switch, by-pass switch, high-tension motor, blower plate washer and plate washer actuator；In frequency conversion
Gate out switch is equipped between device and blower motor, the end of incoming cables of gate out switch is connected with frequency converter, leading-out terminal and high-voltage electricity
Motivation is connected；Frequency converter failure signal is exported to program control device input terminal, program control device control signal end respectively with enter
Mouth switch, gate out switch, by-pass switch are connected with the signal terminal of blower plate washer actuator；Blower plate washer actuator passes through machine
Tool connection drives blower plate washer.Its advantage is that blower plate washer quick acting can be made when frequency converter breaks down, reduce suction/air-supply
Amount fluctuation prevents boiler extinguishment to reduce the influence to boiler combustion.
Inventor is in practice, it has been found that the above-mentioned prior art has the following deficiencies:
The technical issues of above-mentioned patent is able to solve is can to control rapidly baffle movement when frequency converter breaks down, reduce
Suction air volume fluctuation, so that the influence to boiler combustion is reduced, but just because of the reduction of suction air volume will lead to gas collection at the top of coke oven
Pipe pressure moment increases, and causes Leaking of Raw Gas From Coke-oven, not only influences normal production, but also Heavy environmental pollution.
Summary of the invention
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of blower variable frequency device error protection electricity
Road, method and its Distributed Control System, technical solution used by the protection circuit are as follows:
A kind of blower variable frequency device fault secure circuit, the protection circuit include:
First driving circuit is used for including power supply, the first frequency converter, first switch module and the first air blower being sequentially connected in series
It is run by first the first air blower of transducer drive；
Second driving circuit, including the power supply, the second frequency converter, second switch module and the second air blower being sequentially connected in series,
For being run by second the second air blower of transducer drive；
First protection circuit, including be successively used for the concatenated third switch module of first air blower and protection power source
When first frequency converter failure, by third switch module conducting the first protection circuit, phase is driven by protection power source
The air blower answered operates normally；With
Second protection circuit, including successively used with concatenated 4th switch module of the second air blower and the protection power source
In in second frequency converter failure, by the 4th switch module conducting the second protection circuit, driven by protection power source
Corresponding air blower is moved to operate normally；
Wherein, the first interlock switch of the first switch module and second switch module composition, for the first driving branch to be connected
Or second driving branch；The third switch module and the 4th switch module constitute the second interlock switch, drive described first
Dynamic branch perhaps second drives when branch trouble for corresponding first protection branch or the second protection branch to be connected.
Further, second interlock switch includes third interlocking branch and the 4th interlocking branch；
Third interlocking branch is connected by the normally-closed contact of the 5th A.C. contactor, the coil of the 6th A.C. contactor and controller
Composition, the normally opened contact access of the 5th A.C. contactor the first protection circuit；
4th interlocking branch is connected by the normally-closed contact of the 6th A.C. contactor, the coil of the 5th A.C. contactor and controller
Composition, the normally opened contact access of the 6th A.C. contactor the second protection circuit.
Further, the first switch module in first interlock switch includes the first driving branch and the first protection detection
Branch, second switch module include the second driving branch and the second protection detection branch；
The first driving branch is the normally-closed contact and controller of coil by the first A.C. contactor, the second A.C. contactor
It is composed in series；
The first protection detection branch is by the coil of the second A.C. contactor, the normally-closed contact of the first A.C. contactor, the
The normally-closed contact and controller of four A.C. contactors are composed in series；
The second driving branch is the normally-closed contact and controller of coil by third A.C. contactor, the 4th A.C. contactor
It is composed in series；
The second protection detection branch is by the coil of the 4th A.C. contactor, the normally-closed contact of third A.C. contactor, the
The normally-closed contact and controller of two A.C. contactors are composed in series；
Wherein, the normally opened contact of first A.C. contactor accesses first driving circuit；The third A.C. contactor
Normally opened contact access the second driving circuit.
Further, second interlock switch further includes third protection instruction branch and the 4th protection instruction branch；
Third protection instruction branch be by the coil of the first relay, the second relay normally closed contact of the second relay and
It is formed after controller series connection；The normally opened contact of first relay accesses the third and interlocks branch, and normally-closed contact accesses institute
The 4th interlocking branch is stated, the third interlocking instruction branch and the third interlock branch circuit parallel connection；
The 4th protection instruction branch is the normally-closed contact and controller of coil by second relay, the first relay
It is formed after series connection；The normally opened contact access of second relay the 4th interlocking branch, normally-closed contact access the third
Interlock branch, the 4th interlocking instruction branch and the 4th interlocking branch circuit parallel connection；
Wherein, when the third interlocks instruction branch or the 4th interlocking instruction branch conducting, the controller control is corresponding
Indicator light it is bright.
Further, the first switch module includes the first driving instruction being made of third relay and the 4th relay
Branch；The second switch module includes the second driving instruction branch being made of the 5th relay and the 6th relay；
The first driving instruction branch is the coils from parallel connection of coils of coil and the first A.C. contactor by third relay, described the
The normally-closed contact access of three relays the first protection detection branch, the coil and the second ac contactor of the 4th relay
The coils from parallel connection of coils of device, the normally-closed contact access of the 4th relay the first driving branch；
The second driving instruction branch is the coils from parallel connection of coils of coil by the 5th relay and third A.C. contactor, described the
The normally-closed contact access of five relays the second protection detection branch, the coil and the 4th ac contactor of the 6th relay
The coils from parallel connection of coils of device, the normally-closed contact access of the 6th relay the second driving branch；
Wherein, in the first driving instruction branch or the second driving instruction branch conducting, the controller control is corresponding
Indicator light it is bright.
It is another object of the present invention to provide a kind of collecting and distributing control method, technical solution used by this method is such as
Under:
A kind of collecting and distributing control method, method includes the following steps:
The operation of first the first air blower of transducer drive is controlled by switch module or switch module controls the second frequency converter and drives
Dynamic second air blower operation；
In the first frequency converter failure, by third switch module conducting the first protection circuit, protection power source drives the first air blast
Machine operates normally, and under the action of the second interlock switch, disconnects the second protection circuit；
In the second frequency converter failure, pass through the 4th switch module conducting the second protection circuit, the protection power source driving second
Air blower operates normally, and under the action of the second interlock switch, disconnects the first protection circuit.
Further, this method is further comprising the steps of:
Switch module disconnects protection by the connection between the first interlock switch conducting the first frequency converter of driving and the first air blower
Connection between power supply and the first air blower；Or
Protection power source is connected and drives the operation of the first air blower, disconnects the connection between the first frequency converter and the first air blower.
Further, this method is further comprising the steps of:
Switch module disconnects protection by the connection between the first interlock switch conducting the second frequency converter of driving and the second air blower
Connection between power supply and the second air blower；Or
Protection power source driving driving the second air blower operation is connected, disconnects the connection between the second frequency converter and the second air blower.
It is another object of the present invention to provide a kind of Distributed Control System, technical solution used by the system is such as
Under:
A kind of Distributed Control System, the control system use above-mentioned blower variable frequency device fault secure circuit.
The invention has the following beneficial effects:
The embodiment of the present invention is controlled by two independent air blowers of setting by two independent driving branches, passes through first
Interlock switch realizes that a preparation and a use prevents the purpose of coal gas diffusion, and protection electricity is respectively set on the driving branch road of air blower
Road is connected corresponding protection circuit by switch module, continues as air blast when driving the frequency converter failure in branch accordingly
Machine provides the working frequency of corresponding power supply and standard, can prevent the caused safety accident in frequency converter failure, setting
Two protection circuits guarantee that after being switched to protection circuit, first protects circuit or the second guarantor by the second interlock switch
Single channel conducting is protected, guarantees coal gas without release.
The drum air-cooler chaser number due to caused by frequency conversion is about 5 to drum air-cooler every year before using the protection circuit
Secondary, each coal gas diffusion is about 30000NM3.After using the protection circuit, the annual coal gas diffusion amount that reduces is about
150000NM3In/year, reduce environmental pollution, social enviroment protection contribution is huge.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of blower variable frequency device fault secure circuit provided by the embodiment of the present invention；
Fig. 2 is the structural schematic diagram that branch and the 4th interlocking branch are interlocked about the third in the second interlock switch；
Fig. 3 is the structural schematic diagram about driving branch and protection detection branch in the first interlock switch；
Fig. 4 is the structural schematic diagram about the protection instruction branch in the second interlock switch；
Fig. 5 is the structural schematic diagram about the driving instruction branch in the first interlock switch；
Fig. 6 is a kind of structural schematic diagram for blower variable frequency device fault secure circuit that another embodiment of the present invention provides.
Specific embodiment
Below by specific embodiment combination attached drawing, the present invention will be described in detail, it should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention be can be combined with each other, and the scope of protection of the present invention is not limited thereto.
It should be noted that term " first " involved in the embodiment of the present invention, " second " are used for description purposes only,
It is not understood to indicate or imply relative importance or implicitly indicates the quantity of indicated technical characteristic.Term " phase
Even ", the terms such as " connection " shall be understood in a broad sense, for example, it may be electrical connection, can be directly connected, can also pass through centre
Medium is indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
Controller employed in the present embodiment is controlled using the micro process of PLC either DCS system as controller
System.
In normal work, in order to achieve the purpose that continuous production, it is reliable and stable, reach safety in production, also for preventing
Air blower itself breaks down, and therefore, the independent blower variable frequency operation of setting two, one of air blower is as spare drum
Blower prevents the generation of safety accident.But in order to exclude the failure due to frequency converter, lead to the generation of industrial accident,
It needs further to improve safety protective circuit.
Referring to Fig. 1, it illustrates a kind of blower variable frequency device fault secure circuits provided by the embodiment of the present invention
Structural block diagram, the protection circuit include the first driving branch, the second driving branch, the first protection circuit and the second protection circuit.
First driving circuit be by power supply 100, the first frequency converter 200, first switch module 30 and the first air blower 400 according to
It is secondary to be composed in series.In normal work, which passes through first in the case where first switch module 30 is connected
Frequency converter 200 drives the first air blower 400 to operate normally.
Second driving circuit is by the power supply 100, the second frequency converter 500, second switch module 31 and the second air blower
600 are sequentially connected in series.It is identical as the first driving circuit, in normal work, second driving circuit, in second switch module
In the case where 31 conductings, the operation of the second air blower 600 is driven by the second frequency converter 500.
First protection circuit include successively with the concatenated third switch module 80 of first air blower 400 and protection power source
700.When the first frequency converter failure in first driving circuit, electricity is provided from the first protection circuit to the first air blower
Source, frequency provided by the power supply are normal working frequency, prevent from causing due to the first frequency converter failure the first air blower without
Method work, leads to the generation of safety accident.In the first 200 failure of frequency converter, protected by conducting switch module 80 conducting first
Protection circuit drives corresponding air blower to operate normally by protection power source 700.
Second protection circuit include successively with concatenated 4th switch module 81 of second air blower 600 and the protection
Power supply 700.The second protection circuit is identical as the first protection circuit structure of circuit, shares the same protection power source, should
Frequency provided by protection power source is normal working frequency.In the second 500 failure of frequency converter, by the way that switch module 81 is connected
Conducting the second protection circuit, drives corresponding air blower to operate normally by protection power source 700.
In order to achieve the purpose that prevent coal gas diffusion and air blower from making a preparation and a use, the first air blower and the second air blower are not
It works at the same time, therefore, first protects circuit and second that circuit is protected also not work at the same time.First switch module 30 and second switch
Module 31 constitutes the first interlock switch 300, and when first switch module 30 is connected, second switch module 31 is disconnected, and guarantees the
When one drive circuit is connected, the second driving circuit is the state disconnected；When second switch module 31 is connected, first switch module
30 disconnect, and guarantee that, when the second driving circuit is connected, the first driving circuit is the state disconnected.Likewise, third switch module
80 and the 4th switch module 81 constitute the second interlock switch 800, in first driving circuit or the second driving circuit failure
When, for corresponding first protection branch or the second protection branch to be connected.In the first driving circuit failure, third is opened
When closing the conducting of module 80, the disconnection of the 4th switch module 81 guarantees that the second protection branch is disconnection in the first protection branch conducting
State.In the second driving circuit failure, the 4th switch module 81 conducting, third switch module 80 disconnects, guarantees
When the second protection branch conducting, the first protection branch is the state disconnected.
In conclusion the embodiment of the present invention by setting two independent air blowers, and by two independent driving branches
Control, the purpose of a preparation and a use is realized by the first interlock switch, and protection electricity is respectively set on the driving branch road of air blower
Road is connected corresponding protection circuit by switch module, continues as air blast when driving the frequency converter failure in branch accordingly
Machine provides the working frequency of corresponding power supply and standard, can prevent the caused safety accident in frequency converter failure, setting
Two protection circuits are guaranteed by the second interlock switch, after being switched to protection circuit, the first protection circuit or second
Single channel conducting is protected, achievees the purpose that air blower a preparation and a use, guarantees coal gas without release.
Referring to Fig. 2, it illustrates the thirds provided in an embodiment of the present invention about in the second interlock switch to interlock branch
With the structural schematic diagram of the 4th interlocking branch, wherein the second interlock switch includes third interlocking branch 201 and the 4th interlocking branch
202, third interlocking branch 201 is the coil of normally-closed contact by the 5th A.C. contactor 4KM1, the 6th A.C. contactor 4KM2
It is composed in series with controller, the normally opened contact access of the 5th A.C. contactor 4KM1 the first protection circuit；4th mutually
Lock branch 202 is the coil and controller string of normally-closed contact by the 6th A.C. contactor 4KM2, the 5th A.C. contactor 4KM1
Connection composition, the normally opened contact access of the 6th A.C. contactor the second protection circuit.It is connected in third interlocking branch 201
When, the coil conducting of the 6th A.C. contactor 4KM2, the normally-closed contact of the 6th A.C. contactor 4KM2 disconnects, the 4th interlocking branch
202 disconnect, and reach interlocking purpose.Similarly, when the 4th interlocking branch 202 is connected, the coil of the 5th A.C. contactor 4KM1
The normally-closed contact of conducting, the 5th A.C. contactor 4KM1 disconnects, and third interlocks branch 201 and disconnects, and reaches interlocking purpose.Cause
This, third interlocking branch and the 4th interlocking branch can reach interlocking purpose.
It should be noted that L11 the and N11 connecting terminal in figure is connected with the corresponding port of controller, in the following drawings
The connecting terminal is identical as the connection type of connecting terminal herein, is connected with the corresponding port of controller, no longer superfluous below
It states.
Referring to Fig. 3, it illustrates the driving branch provided in an embodiment of the present invention about in the first interlock switch and guarantors
Protect the structural schematic diagram of detection branch, wherein the first interlock switch includes first switch module and second switch module.Wherein,
First switch module includes the first driving branch 301 and the first protection detection branch 302, and second switch module includes the second driving
Branch 303 and the second protection detection branch 304.
First driving branch 301 be by the coil of the first A.C. contactor 1KM1, the second A.C. contactor 1KM2 it is normally closed
Contact and controller are composed in series.First protection detection branch 302 be by the second A.C. contactor 1KM2 coil, first exchange
The normally-closed contact of contactor 1KM1, the normally-closed contact of the 4th A.C. contactor 2KM2 and controller are composed in series.Second driving branch
Road 303 is by the coil of third A.C. contactor 2KM1, the normally-closed contact of the 4th A.C. contactor 2KM2 and controller series connection group
At.Second protection detection branch 304 is by the normally closed touching of the coil, third A.C. contactor 2KM1 of the 4th A.C. contactor 2KM2
Point, the normally-closed contact of the second A.C. contactor 1KM2 and controller are composed in series.Wherein, the first of the first switch module is handed over
The normally opened contact for flowing contactor 1KM1 accesses first driving circuit；The third A.C. contactor of the second switch module
The normally opened contact of 2KM1 accesses the second driving circuit.
When the first driving branch 301 is connected, the coil of the first A.C. contactor 1KM1 is connected, at this time the first ac contactor
The normally-closed contact of device 1KM1 disconnects, therefore the first protection detection branch 302 disconnects, the normally opened contact of the first A.C. contactor 1KM1
Conducting, the conducting of the first driving circuit, the first air blower operate normally.In frequency converter failure, the first protection detection branch 302 is led
Logical, the coil conducting of the second A.C. contactor 1KM2, the normally-closed contact of the second A.C. contactor 1KM2 disconnects at this time, therefore first
Branch 301 is driven to disconnect, the second protection detection branch 304 disconnects, and supplies from the first protection detection branch 302 to the first air blower
Electricity guarantees that the first air blower operates normally.
When the second driving branch 303 is connected, the coil of third A.C. contactor 2KM1 is connected, at this time third ac contactor
The normally-closed contact of device 2KM1 disconnects, therefore the second protection detection branch 304 disconnects, the normally opened contact of third A.C. contactor 2KM1
Conducting, the conducting of the second driving circuit, the second air blower operate normally.In frequency converter failure, the second protection detection branch 304 is led
Logical, the coil conducting of the 4th A.C. contactor 2KM2, the normally-closed contact of the 4th A.C. contactor 2KM2 disconnects at this time, therefore second
It drives branch 303 and the first protection detection branch 302 to disconnect, powers, protect from the second protection detection branch 304 to the second air blower
Demonstrate,prove the second air blower normal operation.
Referring to Fig. 4, it illustrates the protections provided in an embodiment of the present invention about in the second interlock switch to indicate branch
Structural schematic diagram, the second interlock switch further include third protection instruction branch 401 and the 4th protection instruction branch 402.
Third protection instruction branch 401 is the second relay of coil by the first relay 4KA1, the second relay 4KA2
It is formed after device normally-closed contact and controller series connection, the normally opened contact access third interlocking branch 202 of the first relay 4KA1, first
Two normally-closed contacts of relay 4KA1 are respectively connected to the 4th protection instruction branch 402 and the 4th interlocking branch 201, third protection
Indicate that branch 401 is in parallel with third interlocking branch 202.In the first frequency converter failure, first turn on the first relay 4KA1's
Coil, the normally opened contact conducting of the first relay 4KA1, corresponding normally-closed contact disconnect at this time, guarantee to interlock branch in third
In the case where 202 conductings, the 4th interlocking branch 201 and the 4th protection instruction branch 402 are disconnected, the corresponding instruction of controller control
Lamp is bright.
4th protection instruction branch 402 is the normally-closed contact of coil by the second relay 4KA2, the first relay 4KA1
It is formed with after controller series connection, the normally opened contact access of the second relay 4KA2 the 4th interlocking branch 201, the second relay
Two normally-closed contacts be respectively connected to third protection instruction branch 401 and third interlocking branch 201, the 4th protection instruction branch
402 is in parallel with the 4th interlocking branch 201.In the second frequency converter failure, the coil of relay 4KA2 is first turned on, at this time
The normally opened contact of second relay 4KA2 is connected, and corresponding normally-closed contact disconnects, and guarantees the feelings be connected in the 4th interlocking branch 201
Under condition, third protection instruction branch 401 and third interlocking branch 201 are disconnected, and it is bright that controller controls corresponding indicator light.
Referring to Fig. 5, it illustrates the drivings provided in an embodiment of the present invention about in the first interlock switch to indicate branch
Structural schematic diagram, first switch module include be made of third relay 1KA1 and the 4th relay 1KA2 first driving refer to
Show branch；Second switch module includes the second driving instruction branch being made of the 5th relay 2KA1 and the 6th relay 2KA2
Road.The coils from parallel connection of coils of the coil of third relay 1KA1 and the first A.C. contactor 1KM1, the normally closed touching of third relay 1KA1
Point access the first protection detection branch 302.The coil of the coil of 4th relay 1KA2 and the second A.C. contactor 1KM2
Parallel connection, the normally-closed contact access of the 4th relay 1KA2 the first driving branch 301.First protection detection branch 302 or
When person first drives branch 301 to be connected, it is ensured that another branch disconnects, and it is bright that controller controls corresponding indicator light.
The coil of 5th relay 2KA1 and the coils from parallel connection of coils of third A.C. contactor 2KM1, the 5th relay 2KA1's is normal
Closed contact access the second protection detection branch 304.The coil of 6th relay 2KA2 and the 4th A.C. contactor 2KM2's
Coils from parallel connection of coils, the normally-closed contact access of the 6th relay 2KA2 the second driving branch 303.Detection branch is protected second
304 or the second driving branch 303 when being connected, it is ensured that another branch disconnects, and it is bright that controller controls corresponding indicator light.
Referring to Fig. 6, it illustrates a kind of blower variable frequency device error protection electricity that another embodiment of the present invention provides
The structural schematic diagram on road, the protection circuit include the first driving circuit, the second driving circuit, the first protection circuit and the second protection
Circuit, first driving circuit and the second driving power share power supply VCC, pass through the first frequency converter UF1 and the by power supply VCC
The normally opened contact of one A.C. contactor 1KM1 and the motor M1 of the first air blower form the first driving circuit, are passed through by power supply VCC
Motor M2 composition the second driving electricity of the normally opened contact and the second air blower of second frequency converter UF2 and third A.C. contactor 2KM1
Road.First protection circuit and the second protection circuit share backup power source VCC1, pass through the 5th ac contactor by backup power source VCC1
The motor M1 of the normally opened contact of device 4KM1 and the first air blower composition the first protection circuit.It is handed over by backup power source VCC1 by the 6th
Flow the normally opened contact of contactor 4KM2 and motor M2 composition the second protection circuit of the second air blower.
Preferably, power supply VCC pass through respectively circuit breaker Q F01 and QF02 accordingly with the first frequency converter UF1, second
Frequency converter UF2 is connected.The backup power source VCC1 passes through the normally opened touching of circuit breaker Q F03 and the 5th A.C. contactor 4KM1
Point is connected with the normally opened contact of the 6th A.C. contactor 4KM2.
In the first frequency converter UF1 failure, controller control the first protection circuit conducting, by the first protection circuit output phase
The working frequency answered provides working power for air blower, guarantees that air blower works normally.Similarly, the and frequency converter UF2 therefore
When barrier, controller control the and protect circuit to be connected, provided by the second protection corresponding working frequency of circuit output for air blower
Working power guarantees that air blower works normally, safety accident caused by preventing because of blower fault.
It is another object of the present invention to provide a kind of collecting and distributing control method, technical solution used by this method is such as
Under:
A kind of collecting and distributing control method, method includes the following steps:
The operation of first the first air blower of transducer drive is controlled by switch module or switch module controls the second frequency converter and drives
Dynamic second air blower operation；In the first frequency converter failure, pass through third switch module conducting the first protection circuit, protection power source
It drives the first air blower to operate normally, under the action of the second interlock switch, disconnects the second protection circuit；In the event of the second frequency converter
When barrier, by the 4th switch module conducting the second protection circuit, the protection power source drives the second air blower to operate normally, the
Under the action of two interlock switch, the first protection circuit is disconnected.
Preferably, switch module passes through the company between the first interlock switch conducting the first frequency converter of driving and the first air blower
It connects, disconnects the connection between protection power source and the first air blower；Or conducting protection power source drives the operation of the first air blower, disconnects
Connection between first frequency converter and the first air blower.
Preferably, switch module passes through the company between the first interlock switch conducting the second frequency converter of driving and the second air blower
It connects, disconnects the connection between protection power source and the second air blower；Or conducting protection power source driving driving the second air blower operation,
Disconnect the connection between the second frequency converter and the second air blower.
The embodiment of the invention also provides a kind of Distributed Control System, which is mentioned using any of the above-described embodiment
The blower variable frequency device fault secure circuit of confession.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of blower variable frequency device fault secure circuit, which is characterized in that the protection circuit includes:
First driving circuit is used for including power supply, the first frequency converter, first switch module and the first air blower being sequentially connected in series
It is run by first the first air blower of transducer drive；
Second driving circuit, including the power supply, the second frequency converter, second switch module and the second air blower being sequentially connected in series,
For being run by second the second air blower of transducer drive；
First protection circuit, including be successively used for the concatenated third switch module of first air blower and protection power source
When first frequency converter failure, by third switch module conducting the first protection circuit, phase is driven by protection power source
The air blower answered operates normally；With
Second protection circuit, including successively used with concatenated 4th switch module of the second air blower and the protection power source
In in second frequency converter failure, by the 4th switch module conducting the second protection circuit, driven by protection power source
Corresponding air blower is moved to operate normally；
Wherein, the first interlock switch of the first switch module and second switch module composition, for the first driving branch to be connected
Or second driving branch；The third switch module and the 4th switch module constitute the second interlock switch, drive described first
Dynamic branch perhaps second drives when branch trouble for corresponding first protection branch or the second protection branch to be connected.
2. a kind of blower variable frequency device fault secure circuit according to claim 1, which is characterized in that the second interlock switch
Branch and the 4th interlocking branch are interlocked including third；
Third interlocking branch is connected by the normally-closed contact of the 5th A.C. contactor, the coil of the 6th A.C. contactor and controller
Composition, the normally opened contact access of the 5th A.C. contactor the first protection circuit；
4th interlocking branch is connected by the normally-closed contact of the 6th A.C. contactor, the coil of the 5th A.C. contactor and controller
Composition, the normally opened contact access of the 6th A.C. contactor the second protection circuit.
3. a kind of blower variable frequency device fault secure circuit according to claim 1 or 2, which is characterized in that described first
First switch module in interlock switch includes the first driving branch and the first protection detection branch, and second switch module includes the
Two driving branches and the second protection detection branch；
The first driving branch is the normally-closed contact and controller of coil by the first A.C. contactor, the second A.C. contactor
It is composed in series；
The first protection detection branch is by the coil of the second A.C. contactor, the normally-closed contact of the first A.C. contactor, the
The normally-closed contact and controller of four A.C. contactors are composed in series；
The second driving branch is the normally-closed contact and controller of coil by third A.C. contactor, the 4th A.C. contactor
It is composed in series；
The second protection detection branch is by the coil of the 4th A.C. contactor, the normally-closed contact of third A.C. contactor, the
The normally-closed contact and controller of two A.C. contactors are composed in series；
Wherein, the normally opened contact of first A.C. contactor accesses first driving circuit；The third A.C. contactor
Normally opened contact access the second driving circuit.
4. a kind of blower variable frequency device fault secure circuit according to claim 2, which is characterized in that second interlocking
Switch further includes third protection instruction branch and the 4th protection instruction branch；
Third protection instruction branch be by the coil of the first relay, the second relay normally closed contact of the second relay and
It is formed after controller series connection；The normally opened contact of first relay accesses the third and interlocks branch, and normally-closed contact accesses institute
The 4th interlocking branch is stated, the third interlocking instruction branch and the third interlock branch circuit parallel connection；
The 4th protection instruction branch is the normally-closed contact and controller of coil by second relay, the first relay
It is formed after series connection；The normally opened contact access of second relay the 4th interlocking branch, normally-closed contact access the third
Interlock branch, the 4th interlocking instruction branch and the 4th interlocking branch circuit parallel connection；
Wherein, when the third interlocks instruction branch or the 4th interlocking instruction branch conducting, the controller control is corresponding
Indicator light it is bright.
5. a kind of blower variable frequency device fault secure circuit according to claim 3, which is characterized in that the first switch
Module includes the first driving instruction branch being made of third relay and the 4th relay；The second switch module include by
Second driving instruction branch of the 5th relay and the 6th relay composition；
The first driving instruction branch is the coils from parallel connection of coils of coil and the first A.C. contactor by third relay, described the
The normally-closed contact access of three relays the first protection detection branch, the coil and the second ac contactor of the 4th relay
The coils from parallel connection of coils of device, the normally-closed contact access of the 4th relay the first driving branch；
The second driving instruction branch is the coils from parallel connection of coils of coil by the 5th relay and third A.C. contactor, described the
The normally-closed contact access of five relays the second protection detection branch, the coil and the 4th ac contactor of the 6th relay
The coils from parallel connection of coils of device, the normally-closed contact access of the 6th relay the second driving branch；
Wherein, in the first driving instruction branch or the second driving instruction branch conducting, the controller control is corresponding
Indicator light it is bright.
6. a kind of collecting and distributing control method, method includes the following steps:
The operation of first the first air blower of transducer drive is controlled by switch module or switch module controls the second frequency converter and drives
Dynamic second air blower operation；
In the first frequency converter failure, by third switch module conducting the first protection circuit, protection power source drives the first air blast
Machine operates normally, and under the action of the second interlock switch, disconnects the second protection circuit；
In the second frequency converter failure, pass through the 4th switch module conducting the second protection circuit, the protection power source driving second
Air blower operates normally, and under the action of the second interlock switch, disconnects the first protection circuit.
7. a kind of collecting and distributing control method according to claim 6, this method are further comprising the steps of:
Switch module disconnects protection by the connection between the first interlock switch conducting the first frequency converter of driving and the first air blower
Connection between power supply and the first air blower；Or
Protection power source is connected and drives the operation of the first air blower, disconnects the connection between the first frequency converter and the first air blower.
8. a kind of collecting and distributing control method according to claim 6, this method are further comprising the steps of:
Switch module disconnects protection by the connection between the first interlock switch conducting the second frequency converter of driving and the second air blower
Connection between power supply and the second air blower；Or
Protection power source driving driving the second air blower operation is connected, disconnects the connection between the second frequency converter and the second air blower.
9. a kind of Distributed Control System, which is characterized in that the control system includes one kind described in claim 1 ~ 5 any one
Blower variable frequency device fault secure circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447731.5A CN109639213A (en) | 2018-11-29 | 2018-11-29 | A kind of blower variable frequency device fault secure circuit, method and its Distributed Control System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447731.5A CN109639213A (en) | 2018-11-29 | 2018-11-29 | A kind of blower variable frequency device fault secure circuit, method and its Distributed Control System |
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| CN109639213A true CN109639213A (en) | 2019-04-16 |
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| CN201811447731.5A Pending CN109639213A (en) | 2018-11-29 | 2018-11-29 | A kind of blower variable frequency device fault secure circuit, method and its Distributed Control System |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456960A (en) * | 2020-05-29 | 2020-07-28 | 成都富强电子电器科技有限公司 | Fire-fighting double-speed fan controller |
| CN111648993A (en) * | 2020-06-10 | 2020-09-11 | 广东萨米特陶瓷有限公司 | Control system and method for intelligent standby system of kiln fan |
| CN112713761A (en) * | 2021-01-05 | 2021-04-27 | 邯郸钢铁集团有限责任公司 | Method and device for rapidly switching power unit of large-scale synchronizer |
-
2018
- 2018-11-29 CN CN201811447731.5A patent/CN109639213A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456960A (en) * | 2020-05-29 | 2020-07-28 | 成都富强电子电器科技有限公司 | Fire-fighting double-speed fan controller |
| CN111648993A (en) * | 2020-06-10 | 2020-09-11 | 广东萨米特陶瓷有限公司 | Control system and method for intelligent standby system of kiln fan |
| CN111648993B (en) * | 2020-06-10 | 2022-04-19 | 广东萨米特陶瓷有限公司 | Control system and method for intelligent standby system of kiln fan |
| CN112713761A (en) * | 2021-01-05 | 2021-04-27 | 邯郸钢铁集团有限责任公司 | Method and device for rapidly switching power unit of large-scale synchronizer |
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