CN106444875B - It is a kind of for controlling the device of condenser hotwell liquid level - Google Patents
It is a kind of for controlling the device of condenser hotwell liquid level Download PDFInfo
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- CN106444875B CN106444875B CN201610964820.1A CN201610964820A CN106444875B CN 106444875 B CN106444875 B CN 106444875B CN 201610964820 A CN201610964820 A CN 201610964820A CN 106444875 B CN106444875 B CN 106444875B
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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Abstract
A kind of for controlling the device of condenser hotwell liquid level, including being located at the hot well below condenser, the bottom of hot well passes through water pipe and is connected to two condensate pumps, and two condensate pumps are realized by electric control system to automatically switch；Display system on the spot for showing its inside liquid level is provided on the barrel of hot well and by the remote transmitting system in level value teletransmission to display screen.The present invention thoroughly solves the problems, such as condenser hotwell water level, one condensate pump stops transport in operation or burns phenomenon under undervoltage condition, avoid when liquid level up to a certain degree when, part copper pipe is submerged, reduce the heat exchange area of condenser, the problems such as unit vacuum will receive influence；When liquid level is excessively high or too low, draining and moisturizing timely can be carried out to hot well by cyclic control system, so that the water level in hot well maintains in predetermined range；The features such as automatic switching control system and cyclic control system structure are simple, be quick on the draw, precise control, high safety coefficient.
Description
Technical field
The invention belongs to plant condenser fields, and in particular to for controlling the device of condenser hotwell liquid level.
Background technique
Turbine discharge is condensed into a kind of heat exchanger of water, also known as steam condenser.Condenser is mainly used for turbine power
In device, it is divided into water-cooled condenser and two kinds of air cooling tubes condenser.Condenser, which is removed, is condensed into water boiler of feeding weight for the steam discharge of steam turbine
Newly using outer, moreover it is possible to establish vacuum at turbine discharge and maintain vacuum.
Condenser hotwell is the sump of condenser collective low condensed water.It is mounted on steam turbine surface condenser bottom
A kind of upright cylinder-like part.To collect the main condensate for continuously being condensed by a large amount of steam exhaust and being generated.
The effect of condensate pump mainly cooperates air ejector to generate vacuum, and recirculated water and steam are formed a vacuum.Just
In conveying water, many function can be thus saved, because oxygen-eliminating device is generally all aloft, if will be very without condensate pump vacuum
Arduously, water is crossing water circulating pump and circulating water pool, is finally returning to oxygen-eliminating device, is recycling back and forth in this way.In actual power operation,
If condensate pump is stopped transport, it will keep the liquid level of condenser hotwell high, it is larger to the vacuum influence of unit, when liquid level is up to certain
When degree, part copper pipe is submerged, and reduces the heat exchange area of condenser, and unit vacuum will receive influence.If stopped for a long time
Fortune, liquid level is excessively high, and water can enter steam turbine, and it is badly damaged to may cause equipment.Water slug will cause damage, the sound portion of blade
Divide to touch mill, Cracks In Cylinder or generate and be permanently deformed, damage of thrust pad.Condensate pump works long hours under undervoltage condition, electricity
The torque for overcoming load to need is forced down with regard to big, electric current can also become larger, and connect each other for threephase asynchronous one or two times, voltage
Low, the torque that will lead to generation is small, in order to reach the torque for overcoming load, it is necessary to which high current is easy to burn phase asynchronous
Motor.When water level of thermal well is as low as to a certain degree, condensate pump meeting cavitation, pump does not show water, and deaerator level can not guarantee, just
It will cause shutdown.
Summary of the invention
It is insufficient according to prior art, a kind of for controlling the device of condenser hotwell liquid level, apparatus structure letter is provided
It is single, it is novel in design, thoroughly solve the problems, such as condenser hotwell water level.
It is a kind of for controlling the device of condenser hotwell liquid level, including be located at condenser below hot well, the hot well
Bottom passes through water pipe and is connected to two condensate pumps, and two condensate pumps pass through electric control system and realize automatic switchover；It is described
The display system on the spot for showing its inside liquid level is provided on the barrel of hot well and will be in level value teletransmission to display screen
Remote transmitting system.
Preferably, the remote transmitting system includes being provided with linker on the barrel of hot well, is set in the linker
It is equipped with a magnetic floating ball, the inner wall of linker is uniformly equipped with multiple tongue tubes from bottom to up, each tongue tube concatenates respectively
One resistance, multiple groups tongue tube and resistance connect together, and are shown level value teletransmission into display screen by detection system.
Preferably, the detection system includes resistance value detector, is provided with voltmeter in the resistance value detector
And signal is passed to controller by converter by ammeter, the ratio measured by voltmeter and ammeter, controller is again
Numerical signal is shown in display screen by D/A converter.
Preferably, the display system on the spot includes the magnetic flap being located on linker barrel, the magnetism
Turnover panel is sequentially arranged by multiple cylindrical magnetic sheets and is formed, each cylindrical magnetic sheet is by two different magnetic semicolumn magnetic sheet groups
At passing through the overturning that magnetic floating ball and semicolumn magnetic sheet magnetic coupling realize cylindrical magnetic sheet.
Preferably, two semicolumn magnetic sheets in the cylindrical magnetic sheet are the semicolumn magnetic sheet of two different colours.
Preferably, the electric control system includes under-voltage replay KA1, undercurrent relay KA2, multiple times
Relay, multiple intermediate relays and three-phase alternating current；The intermediate relay includes relay KA3, relay KA4 and relay
Device KA5；The time relay includes energization delay relay KT1 and power-off delay relay KT2；The under-voltage replay
The coil of KA1 is simultaneously connected in the two-phase of three-phase alternating current, and the coil tandem of the undercurrent relay KA2 is in three-phase alternating current
In any phase, normally opened contact on the under-voltage replay KA1 and undercurrent relay KA2 respectively with energization delay relay
The coil of KT1 is connected, and the normally opened contact of the energization delay relay KT1 is connected with the coil of relay KA3, the relay
Three normally-closed contacts of KA3 are concatenated on three-phase alternating current, for controlling the start and stop of condensate pump M1, one of relay KA3
Normally-closed contact is connected with the coil of power-off delay relay KT2, the normally opened contact and relay KA4 of power-off delay relay KT2
Coil be connected, the input terminal of the normally opened contact of relay KA4 is connected with a normally opened contact of relay KA3, relay KA4
The output end of normally opened contact be connected with the coil of relay KA5, three normally opened contacts of relay KA5 are concatenated into three-phase alternating current
On electricity, for controlling the start and stop of condensate pump M2.
Preferably, another normally opened contact of the relay KA4 is connected to Signal Terminal, the prison for host computer
Control.
It preferably, further include cyclic control system, the cyclic control system includes one and is located at hot well barrel top
High resistance electric contact and its internal electric shock S1, a low resistance electric contact for being located at hot well barrel lower part and its internal touching
Electric S2；The cyclic control system further includes three-phase alternating current, threephase asynchronous machine M3 for draining to hot well, gives condenser
The threephase asynchronous machine M4 of moisturizing, A.C. contactor KM1, A.C. contactor KM2, energization delay relay KT1, on-delay after
Electric appliance KT2；Any one of the three-phase alternating current exchanges the control circuit for being electrically connected with two phases and connecing, wherein control circuit I
It is described including electric shock S1, the normally-closed contact of energization delay relay KT1 and the coil of A.C. contactor KM1 successively mutually concatenated
The normally opened contact of A.C. contactor KM1 S1 phase and connects with electric shock, the coil and on-delay of the energization delay relay KT1 after
The normally-closed contact of electric appliance KT1 and the coil phase of A.C. contactor KM1 simultaneously connect；Control circuit II includes the electric shock successively mutually concatenated
The coil of S2, the normally-closed contact of energization delay relay KT2 and A.C. contactor KM2, the normally opened touching of the A.C. contactor KM2
Point S2 phase and connects with electric shock, the coil of the energization delay relay KT2 and the normally-closed contact of energization delay relay KT2 and friendship
It flows the coil phase of contactor KM2 and connects；The three-phase alternating current is different with three by three normally opened contacts of A.C. contactor KM1
Step motor M3 phase concatenates, three normally opened contacts and threephase asynchronous machine M4 that the three-phase alternating current passes through A.C. contactor KM2
Mutually concatenate.
It preferably, further include electrothermal relay KS1 and electrothermal relay KS2, the coil of the electrothermal relay KS1 is different with three
Step motor M3 phase concatenates, and the normally-closed contact of electrothermal relay KS1 is concatenated with I phase of control circuit；The coil of the electrothermal relay KS2 with
Threephase asynchronous machine M4 phase concatenates, and the normally-closed contact of electrothermal relay KS2 is concatenated with II phase of control circuit.
The invention has the advantages that:
The present invention thoroughly solves the problems, such as that condenser hotwell water level, a condensate pump are stopped transport in operation or owed
Phenomenon is burnt in the case of pressure, avoid when liquid level up to a certain degree when, part copper pipe is submerged, and reduces the heat exchange of condenser
The problems such as area, unit vacuum will receive influence；
When liquid level is excessively high or too low, draining and moisturizing timely can be carried out to hot well by cyclic control system,
So that the water level in hot well maintains in predetermined range；
The automatic switching control system and cyclic control system structure are simple, are quick on the draw, precise control, safety coefficient
The features such as height, strong antijamming capability；
Be provided with display system on the spot, can accurately observe the liquid level of condensed water in hot well, by the height of liquid level come
Corresponding measure is implemented to condenser；
It is provided with remote transmitting system, can be observed in real time by the liquid level teletransmission of condensed water in hot well into host computer
The liquid level of condensed water in hot well.
Detailed description of the invention
Fig. 1 is overall structure of the present invention；
Fig. 2 is hot well structural schematic diagram；
Fig. 3 is that the tongue tube in the present invention connect circuit diagram with resistance；
Fig. 4 is remote transmitting system electric control principle block diagram of the present invention；
Fig. 5 is two condensate pump auto-changeover control schematic diagrams；
Fig. 6 is cyclic control system circuit diagram；
1-linker, 2-magnetic floating balls, 3-tongue tubes, 4-resistance, 5-display screens, 6-resistance value detectors, 7-AD
Converter, 8-controllers, 9-D/A converters, 10-magnetic flaps, 21-high resistance electric contacts, 22-low resistance electric contacts,
100-condensers, 200-hot wells.
Specific embodiment
Below in conjunction with shown in attached drawing 1 to attached drawing 6, by specific embodiment, the present invention is further illustrated.
Embodiment one:
It is a kind of for controlling the device of condenser hotwell liquid level, the hot well 200 including being located at the lower section of condenser 100, hot well
200 bottom passes through water pipe and is connected to two condensate pumps, and two condensate pumps pass through electric control system and realize automatic switchover.
Electric control system includes under-voltage replay KA1, undercurrent relay KA2, multiple time relays, Duo Gezhong
Between relay and three-phase alternating current；Intermediate relay includes relay KA3, relay KA4 and relay KA5；The time relay
Including energization delay relay KT1 and power-off delay relay KT2；The coil of under-voltage replay KA1 is simultaneously connected to three-phase alternating current
Electricity appoint two-phase on, the coil tandem of undercurrent relay KA2 in any phase of three-phase alternating current, under-voltage replay KA1 and
Normally opened contact on undercurrent relay KA2 is connected with the coil of energization delay relay KT1 respectively, energization delay relay
The normally opened contact of KT1 is connected with the coil of relay KA3, and three normally-closed contacts of relay KA3 are concatenated on three-phase alternating current,
For controlling the start and stop of condensate pump M1, the coil phase of a normally-closed contact and power-off delay relay KT2 of relay KA3
Even, the normally opened contact of power-off delay relay KT2 is connected with the coil of relay KA4, the input of the normally opened contact of relay KA4
End is connected with a normally opened contact of relay KA3, the output end of the normally opened contact of relay KA4 and the coil of relay KA5
It is connected, three normally opened contacts of relay KA5 are concatenated on three-phase alternating current, for controlling the start and stop of condensate pump M2.Relay
Another normally opened contact of device KA4 is connected to Signal Terminal, the monitoring for host computer.
Embodiment two:
On the basis of example 1, the display on the spot for showing its inside liquid level is provided on the barrel of hot well 200
System and by the remote transmitting system in level value teletransmission to display screen.
Remote transmitting system includes being provided with linker 1 on the barrel of hot well 200, and it is floating that a magnetic is provided in linker 1
Ball 2, the inner wall of linker 1 are uniformly equipped with multiple tongue tubes 3 from bottom to up, each tongue tube concatenates a resistance 4 respectively,
Multiple groups tongue tube and resistance connect together, and are shown level value teletransmission into display screen 5 by detection system.Detection system packet
Resistance value detector 6 is included, is provided with voltmeter and ammeter in resistance value detector 6, is measured by voltmeter and ammeter
Signal is passed to controller 8 by converter 7 by ratio, and controller 8 is further through D/A converter 9 by numerical signal in display screen
It is shown in 5.Wherein, controller 8 uses AT89S51 type single-chip microcontroller, this series monolithic is low-power consumption, has the online class of 4KB
Program the single-chip microcontroller of flash storage, the instruction system and pin compatibility of it and general 80C51 series monolithic.In piece
Flash allows to reprogram online, it is possible to use programming non-volatile memory, it is by universal cpu and online programmable
Flash is integrated on a single die, forms powerful, using flexible and the microcontroller with superior performance cost performance.
Converter 7 uses ADC0809 type converter.D/A converter 9 uses DAC0832 type converter.Display screen 5 uses 12864 liquid
Crystalline substance screen, the screen display advantage of lower cost of the dot matrix are suitable for each quasi-instrument, the display field of small device.
Display system includes the magnetic flap 10 being located on 1 barrel of linker on the spot, and magnetic flap 10 is by multiple circles
Cylindricality magnetic sheet is sequentially arranged composition, each cylindrical magnetic sheet is made of two different magnetic semicolumn magnetic sheets, floating by magnetic
Ball 2 and semicolumn magnetic sheet magnetic coupling realize the overturning of cylindrical magnetic sheet.Two semicolumn magnetic sheets in cylindrical magnetic sheet are two
The semicolumn magnetic sheet of different colours, half are red, and half is white, white and the reality that red intersection is in hot well 200
Border liquid level.
Embodiment three:
It further include cyclic control system on the basis of embodiment one or embodiment two, cyclic control system includes one
It is located at 200 barrel lower part of hot well positioned at the high resistance electric contact 21 on 200 barrel top of hot well electric shock S1 internal with it, one
Low resistance electric contact 22 and its internal electric shock S2；Cyclic control system further includes three-phase alternating current, for draining to hot well 200
Threephase asynchronous machine M3, the threephase asynchronous machine M4 to 100 moisturizing of condenser, A.C. contactor KM1, A.C. contactor KM2,
Energization delay relay KT1, energization delay relay KT2；Any one exchange of three-phase alternating current is electrically connected with two phases and connects
Control circuit, wherein control circuit I include successively mutually concatenate electric shock S1, energization delay relay KT1 normally-closed contact and
The coil of A.C. contactor KM1, the normally opened contact of A.C. contactor KM1 and electric shock S1 phase simultaneously connect, energization delay relay KT1's
Coil and the normally-closed contact of energization delay relay KT1 and the coil phase of A.C. contactor KM1 simultaneously connect；Control circuit II include according to
Electric shock S2, the normally-closed contact of energization delay relay KT2 and the coil of A.C. contactor KM2 of secondary phase concatenation, A.C. contactor
The normally opened contact of KM2 S2 phase and connects with electric shock, and the coil of energization delay relay KT2 is normally closed with energization delay relay KT2's
The coil phase of contact and A.C. contactor KM2 simultaneously connect；Three-phase alternating current passes through three normally opened contacts and three of A.C. contactor KM1
Phase Induction Machines M3 phase concatenates, three normally opened contacts and threephase asynchronous machine M4 that three-phase alternating current passes through A.C. contactor KM2
Mutually concatenate.
Example IV:
Further include electrothermal relay KS1 and electrothermal relay KS2 on the basis of embodiment three, the coil of electrothermal relay KS1 with
Threephase asynchronous machine M3 phase concatenates, and the normally-closed contact of electrothermal relay KS1 is concatenated with I phase of control circuit；The coil of electrothermal relay KS2
It is concatenated with threephase asynchronous machine M4 phase, the normally-closed contact of electrothermal relay KS2 is concatenated with II phase of control circuit.It is provided with hot relay
Device, protection motor will not be burnt because of long term overloading.
The course of work:
Under-voltage replay KA1 or low current relay when condensate pump M1 stoppage in transit is perhaps run under undervoltage condition
The normally opened contact of device KA2 is closed, and energization delay relay KT1 is delayed after preset time, and normally opened contact closure causes relay
The coil of KA3 obtains electric, and three normally-closed contacts of relay KA3 are opened to stop condensate pump M1, the normally opened touching of relay KA3
Point closure, normally-closed contact are opened, and power-off delay relay KT2 is delayed after preset time, relay KA4 after normally opened contact closure
Coil obtain electric, the coil of relay KA5 obtains electric after a normally opened contact of relay KA4 closure, thus the three of relay KA5
After the normally opened contact closure of a starting of normally opened contact closure condensate pump M2, relay KA4, connection signal terminal is used for
The monitoring of host computer.
When being run condensate pump M1 is in normal voltage, under-voltage replay KA1 or undercurrent relay KA2
Normally-closed contact open, at this time after the coil losing electricity of energization delay relay KT1, relay KA3 after normally-closed contact is opened
Coil losing electricity, three normally opened contacts closure of relay KA3 open condensate pump M1, after the normally opened contact of relay KA3 is closed
The coil of power-off delay relay KT2 obtains electric, and normally-closed contact is transformed into normally opened contact and keeps, at this point, the line of relay KA4
Power loss is enclosed, the coil losing electricity of relay KA5 after a normally-closed contact of relay KA4 is opened, so that three of them normally-closed contact is beaten
It opens, stops condensate pump M2, after another normally-closed contact of relay KA4 is opened, cut-off signal terminal, the prison for host computer
Control.
When water level reaches high resistance electric contact 21, resistance becomes smaller, at this time its internal electric shock S1 closure, on-delay after
Normally-closed contact closure electric, the normally opened contact of A.C. contactor KA1 that causes the coil of A.C. contactor KA1 to obtain of electric appliance KT1
After closure completion is self-locking, the threephase asynchronous machine M3 for starting draining after remaining three normally opened contacts closure carries out hot well 200
Draining, when water level is lower than high resistance electric contact 21, resistance becomes larger, its internal electric shock S1 is opened at this time, due to ac contactor
The coil of the self-locking function of device KA1, A.C. contactor KA1 still has electricity, after energization delay relay KT1 delay time arrives,
Its normally-closed contact opens the coil losing electricity for causing A.C. contactor KA1, so that three normally-closed contacts of A.C. contactor KA1 are beaten
It opens, the threephase asynchronous machine M3 of draining is caused to shut down.
When water level is lower than low resistance electric contact 2, resistance becomes larger, at this time its internal electric shock S2 closure, on-delay after
Normally-closed contact closure electric, the normally opened contact of A.C. contactor KA2 that causes the coil of A.C. contactor KA2 to obtain of electric appliance KT2
After closure completion is self-locking, the threephase asynchronous machine M4 for starting moisturizing after remaining three normally opened contacts closure carries out hot well 200
Moisturizing, when water level is higher than low resistance electric contact 22, resistance becomes smaller, its internal electric shock S2 is opened at this time, due to ac contactor
The coil of the self-locking function of device KA2, A.C. contactor KA2 still has electricity, after energization delay relay KT2 delay time arrives,
Its normally-closed contact opens the coil losing electricity for causing A.C. contactor KA2, so that three normally-closed contacts of A.C. contactor KA2 are beaten
It opens, the threephase asynchronous machine M4 of moisturizing is caused to shut down.
Although the present invention has shown and described referring particularly to its preferred embodiment, those skilled in the art can be with
Understand, various changes in form and details can be made without departing from model of the invention described in the appended claims
It encloses.It is described in detail above in conjunction with specific embodiments of the present invention, but is not limitation of the present invention.It is all according to this hair
Any simple modification made to the above embodiment of bright technical spirit, still falls within the range of technical solution of the present invention.
Claims (8)
1. it is a kind of for controlling the device of condenser hotwell liquid level, including being located at the hot well (200) below condenser (100),
Be characterized in that: the bottom of the hot well (200) passes through water pipe and is connected to two condensate pumps, and two condensate pumps pass through the control of electricity system
System processed, which is realized, to automatically switch；
Display system on the spot for showing its inside liquid level is provided on the barrel of the hot well (200) and by level value teletransmission
Remote transmitting system on to display screen；
It further include cyclic control system, the cyclic control system includes the high resistance for being located at hot well (200) barrel top
Electric contact (21) and its internal electric shock S1, one be located in the low resistance electric contact (22) and its of hot well (200) barrel lower part
The electric shock S2 in portion；
The cyclic control system further includes three-phase alternating current, threephase asynchronous machine M3 for drain to hot well (200), to coagulating
The threephase asynchronous machine M4 of vapour device (100) moisturizing, A.C. contactor KM1, A.C. contactor KM2, energization delay relay KT1,
Energization delay relay KT2；
Any one of the three-phase alternating current exchanges the control circuit for being electrically connected with two phases and connecing, and wherein control circuit I includes
Electric shock S1, the normally-closed contact of energization delay relay KT1 and the coil of A.C. contactor KM1 successively mutually concatenated, the exchange
The normally opened contact of contactor KM1 S1 phase and connects, the coil and energization delay relay of the energization delay relay KT1 with electric shock
The normally-closed contact of KT1 and the coil phase of A.C. contactor KM1 simultaneously connect；
Control circuit II includes the electric shock S2 successively mutually concatenated, the normally-closed contact and A.C. contactor of energization delay relay KT2
The coil of KM2, the normally opened contact of the A.C. contactor KM2 and electric shock S2 phase simultaneously connect, the line of the energization delay relay KT2
Circle with the normally-closed contact of energization delay relay KT2 and the coil phase of A.C. contactor KM2 and connect；
The three-phase alternating current is concatenated by three normally opened contacts of A.C. contactor KM1 with threephase asynchronous machine M3 phase, described
Three-phase alternating current is concatenated by three normally opened contacts of A.C. contactor KM2 with threephase asynchronous machine M4 phase.
2. according to claim 1 a kind of for controlling the device of condenser hotwell liquid level, it is characterised in that: the teletransmission
System includes being provided with linker (1) on the barrel of hot well (200), is provided with a magnetic floating ball in the linker (1)
(2), the inner wall of linker (1) is uniformly equipped with multiple tongue tubes (3) from bottom to up, each tongue tube concatenates an electricity respectively
It hinders (4), multiple groups tongue tube and resistance connect together, and will be shown in level value teletransmission to display screen (5) by detection system.
3. according to claim 2 a kind of for controlling the device of condenser hotwell liquid level, it is characterised in that: the detection
System includes resistance value detector (6), is provided with voltmeter and ammeter in the resistance value detector (6), passes through voltmeter
The ratio measured with ammeter passes to signal controller (8) by converter (7), and controller (8) is converted further through DA
Device (9) display in display screen (5) by numerical signal.
4. according to claim 2 a kind of for controlling the device of condenser hotwell liquid level, it is characterised in that: it is described on the spot
Display system includes the magnetic flap (10) being located on linker (1) barrel, and the magnetic flap (10) is by multiple cylinders
Shape magnetic sheet is sequentially arranged composition, each cylindrical magnetic sheet is made of two different magnetic semicolumn magnetic sheets, passes through magnetic floating ball
(2) overturning of cylindrical magnetic sheet is realized with semicolumn magnetic sheet magnetic coupling.
5. according to claim 4 a kind of for controlling the device of condenser hotwell liquid level, it is characterised in that: the cylinder
Two semicolumn magnetic sheets in shape magnetic sheet are the semicolumn magnetic sheet of two different colours.
6. according to claim 1 a kind of for controlling the device of condenser hotwell liquid level, it is characterised in that: the electricity system
Control system includes under-voltage replay KA1, undercurrent relay KA2, multiple time relays, multiple intermediate relays and three
Phase alternating current；The intermediate relay includes relay KA3, relay KA4 and relay KA5；The time relay includes
Energization delay relay KT1 and power-off delay relay KT2；
The coil of the under-voltage replay KA1 is simultaneously connected in the two-phase of three-phase alternating current, the undercurrent relay KA2's
Normally opened contact of the coil tandem in any phase of three-phase alternating current, on the under-voltage replay KA1 and undercurrent relay KA2
It is connected respectively with the coil of energization delay relay KT1, the normally opened contact and relay KA3 of the energization delay relay KT1
Coil be connected, three normally-closed contacts of the relay KA3 are concatenated on three-phase alternating current, for controlling condensate pump M1's
One normally-closed contact of start and stop, relay KA3 is connected with the coil of power-off delay relay KT2, power-off delay relay KT2's
Normally opened contact is connected with the coil of relay KA4, and one of the input terminal of the normally opened contact of relay KA4 and relay KA3 is often
It opens contact to be connected, the output end of the normally opened contact of relay KA4 is connected with the coil of relay KA5, and three of relay KA5 are often
It opens contact to be concatenated on three-phase alternating current, for controlling the start and stop of condensate pump M2.
7. according to claim 5 a kind of for controlling the device of condenser hotwell liquid level, it is characterised in that: the relay
Another normally opened contact of device KA4 is connected to Signal Terminal, the monitoring for host computer.
8. according to claim 1 a kind of for controlling the device of condenser hotwell liquid level, it is characterised in that: further include heat
The coil of relay KS1 and electrothermal relay KS2, the electrothermal relay KS1 are concatenated with threephase asynchronous machine M3 phase, electrothermal relay
The normally-closed contact of KS1 is concatenated with I phase of control circuit；The coil of the electrothermal relay KS2 is concatenated with threephase asynchronous machine M4 phase, heat
The normally-closed contact of relay KS2 is concatenated with II phase of control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610964820.1A CN106444875B (en) | 2016-10-28 | 2016-10-28 | It is a kind of for controlling the device of condenser hotwell liquid level |
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|---|---|---|---|
| CN201610964820.1A CN106444875B (en) | 2016-10-28 | 2016-10-28 | It is a kind of for controlling the device of condenser hotwell liquid level |
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| CN106444875B true CN106444875B (en) | 2019-11-08 |
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| CN206111457U (en) * | 2016-10-28 | 2017-04-19 | 中国矿业大学 | Two condensate pump automatic switch -over electric control system |
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| JP4586095B2 (en) * | 2008-02-27 | 2010-11-24 | 株式会社アイエス工業所 | Liquid level control system |
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