CN106444875A - An apparatus used for controlling a liquid level of a hot well of a condenser - Google Patents
An apparatus used for controlling a liquid level of a hot well of a condenser Download PDFInfo
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- CN106444875A CN106444875A CN201610964820.1A CN201610964820A CN106444875A CN 106444875 A CN106444875 A CN 106444875A CN 201610964820 A CN201610964820 A CN 201610964820A CN 106444875 A CN106444875 A CN 106444875A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- 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
An apparatus used for controlling a liquid level of a hot well of a condenser comprises the hot well positioned below the condenser. The bottom portion of the hot well is connected to two condensate water pumps in parallel through water pipes. The two condensate pumps are automatically switched by an electrical system control system. The wall of the hot well is provided with a local display system for displaying the internal liquid level of the hot well and a remote transmit system which transmits the liquid level value to the display. The apparatus of the invention completely solves the problem of the liquid level of the hot well of the condenser and a phenomenon that a condensate water pump stops in an operation process and burns up in an under-voltage condition, thereby avoiding problems that when the liquid level rises to a certain extent, a part of copper pipes is submerged, a heat transfer area of the condenser is reduced, and unit vacuum will be affected. When the liquid level is too high or too low, drainage and replenishment of the hot well can be timely carried out through a cyclic control system, so that the liquid level of the hot well can be maintained within a predetermined range. The automatic switching control system and the cyclic control system has the advantages of a simple structure, sensitive reaction, accurate control, high safety factors, etc.
Description
Technical field
The invention belongs to plant condenser field is and in particular to be used for controlling the device of condenser hotwell liquid level.
Background technology
Turbine discharge is condensed into a kind of heat exchanger of water, also known as steam condenser.Condenser is mainly used in turbine power
In device, it is divided into water-cooled condenser and two kinds of air cooling tubes condenser.Condenser removes and for the steam discharge of steam turbine to be condensed into water boiler of feeding weight
Newly using outer moreover it is possible to setting up vacuum at turbine discharge and maintaining vacuum.
Condenser hotwell is the sump of condenser collective low condensate.It is arranged on steam turbine surface condenser bottom
A kind of upright cylinder-like part.In order to collect the main condensate being generated by the continuous condensation of a large amount of exhaust steam.
The effect of condensate pump is mainly cooperation air ejector and generates vacuum, and recirculated water and steam are formed a vacuum.Just
In conveying water, thus a lot of work(can be saved, because oxygen-eliminating device is general all aloft, 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 so circulating back and forth.In actual power is run,
If condensate pump is stopped transport, it will make the liquid level of condenser hotwell high, larger to the vacuum influence of unit, when liquid level is up to certain
During degree, part copper pipe is submerged, and decreases the heat exchange area of condenser, and unit vacuum can be affected.If stopped for a long time
Fortune, liquid level is too high, and water can enter steam turbine, is likely to result in equipment badly damaged.Water slug will result in the damage of blade, sound portion
Divide and touch mill, Cracks In Cylinder or produce permanent deformation, damage of thrust pad.Condensate pump works long hours under undervoltage condition, electricity
Force down and overcome the moment that load needs just big, electric current also can become big, and threephase asynchronous connects each other for one or two times, voltage
Low, the moment producing can be led to little, in order to reach the torque overcoming load it is necessary to high current, easily burn phase asynchronous
Motor.When water level of thermal well is low to a certain extent, condensate pump meeting cavitation, water do not shown by pump, and deaerator level can not guarantee, just
Can cause to shut down.
Content of the invention
According to the deficiencies in the prior art, provide a kind of device for controlling condenser hotwell liquid level, this apparatus structure letter
Single, novel in design, thoroughly solve the problems, such as condenser hotwell water level.
A kind of device for controlling condenser hotwell liquid level, including the hot well below condenser, described hot well
Bottom is passed through water pipe and is connected to two condensate pumps, and two condensate pumps pass through electric control system and realize automatically switching；Described
Display system on the spot for showing its inside liquid level is provided with the barrel of hot well and by level value teletransmission to display screen
Remote transmitting system.
Preferably, described remote transmitting system includes being provided with linker on the barrel of hot well, sets in described linker
It is equipped with a magnetic floating ball, the inwall of linker is uniformly provided with multiple tongue tubes from bottom to up, and each tongue tube concatenates respectively
One resistance, multigroup tongue tube and resistance connect together, and will be shown by detecting system in level value teletransmission to display screen.
Preferably, described detecting system includes resistance value detector, is provided with voltmeter in described resistance value detector
And ammeter, the ratio being recorded by voltmeter and ammeter through AD converter by signal transmission to controller, controller is again
By D/A converter, numerical signal is shown in display screen.
Preferably, described display system on the spot includes a magnetic flap being located on linker barrel, described magnetic
Turnover panel is sequentially arranged by multiple cylinder magnetic sheets and forms, and each cylindrical magnetic sheet is by the semicolumn magnetic sheet group of two different magnetic
Become, realize the upset of cylindrical magnetic sheet by magnetic floating ball and semicolumn magnetic sheet magnetic coupling.
Preferably, two semicolumn magnetic sheets in described cylinder magnetic sheet are the semicolumn magnetic sheet of two different colours.
Preferably, described electricity control system includes under-voltage replay KA1, undercurrent relay KA2, multiple time
Relay, multiple auxiliary reclay and three-phase alternating current；Described auxiliary reclay includes relay KA3, relay KA4 and relay
Device KA5；The described time relay includes energization delay relay KT1 and power-off delay relay KT2；Described under-voltage replay
The coil of KA1 is simultaneously connected in a two-phase of three-phase alternating current, and the coil tandem of described undercurrent relay KA2 is in three-phase alternating current
In arbitrary phase, normally opened contact on described 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 described energization delay relay KT1 is connected with the coil of relay KA3, described 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 of power-off delay relay KT2 and relay KA4
Coil be connected, the input 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 described relay KA4 is connected to Signal Terminal, for the prison of host computer
Control.
Preferably, also include cyclic control system, described 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 being located at hot well barrel bottom and its internal touching
Electric S2；Described cyclic control system also includes three-phase alternating current, for the threephase asynchronous machine M3 to hot well draining, to condenser
The threephase asynchronous machine M4 of moisturizing, A.C. contactor KM1, A.C. contactor KM2, energization delay relay KT1, on-delay continue
Electrical equipment KT2；Any one exchange of described three-phase alternating current is electrically connected with two phases the control circuit connecing, wherein control circuit I
Including the coil of the electric shock S1, the normally-closed contact of energization delay relay KT1 and A.C. contactor KM1 mutually concatenating successively, described
The normally opened contact of A.C. contactor KM1 with electric shock S1 phase and connects, and the coil of described energization delay relay KT1 is continued with on-delay
The coil phase of the normally-closed contact of electrical equipment KT1 and A.C. contactor KM1 simultaneously connects；Control circuit II includes the electric shock mutually concatenating successively
The coil of S2, the normally-closed contact of energization delay relay KT2 and A.C. contactor KM2, the normally opened of described A.C. contactor KM2 touches
Point with electric shock S2 phase and connect, the coil of described energization delay relay KT2 and the normally-closed contact of energization delay relay KT2 and friendship
The coil phase of stream contactor KM2 simultaneously connects；Three normally opened contacts that described three-phase alternating current passes through A.C. contactor KM1 are different with three
Step motor M3 phase concatenation, described three-phase alternating current passes through three normally opened contacts and the threephase asynchronous machine M4 of A.C. contactor KM2
Mutually concatenate.
Preferably, also include electrothermal relay KS1 and electrothermal relay KS2, the coil of described electrothermal relay KS1 is different with three
Step motor M3 phase concatenation, the normally-closed contact of electrothermal relay KS1 is mutually concatenated with control circuit I；The coil of described electrothermal relay KS2 with
Threephase asynchronous machine M4 phase concatenates, and the normally-closed contact of electrothermal relay KS2 is mutually concatenated with control circuit II.
Beneficial effect of the present invention：
The present invention thoroughly solves the problems, such as condenser hotwell water level, and a condensate pump is in operation and stops transport or in under-voltage feelings
Burn phenomenon under condition, it is to avoid when liquid level up to a certain degree when, part copper pipe is submerged, decrease the heat-transfer surface of condenser
Long-pending, the problems such as unit vacuum can be affected；
When liquid level is too high or too low, draining and moisturizing timely can be carried out to hot well by cyclic control system so that
Water level in hot well maintains in predetermined scope；
This automatic switching control system and cyclic control system structure are simple, be quick on the draw, precise control, safety coefficient are high, anti-
The features such as interference performance is strong；
It is provided with display system on the spot, can accurately observe the liquid level of condensate in hot well, by the height of liquid level come to solidifying
Corresponding measure implemented by vapour device；
It is provided with remote transmitting system, can observe hot well in real time by the liquid level teletransmission of condensate in hot well in host computer
The liquid level of interior condensate.
Brief description
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is hot well structural representation；
Fig. 3 is that the tongue tube in the present invention is connected 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 theory diagrams；
1 linker, 2 magnetic floating ball, 3 tongue tubes, 4 resistance, 5 display screens, 6 resistance value detectors, 7 AD conversion
Device, 8 controllers, 9 D/A converter, 10 magnetic flaps, 21 high resistance electric contacts, 22 low resistance electric contacts, 100
Condenser, 200 hot wells.
Specific embodiment
Below in conjunction with accompanying drawing 1 to shown in accompanying drawing 6, by specific embodiment, the present invention is further illustrated.
Embodiment one：
A kind of device for controlling condenser hotwell liquid level, including the hot well 200 positioned at condenser 100 lower section, hot well 200
Bottom is passed through water pipe and is connected to two condensate pumps, and two condensate pumps pass through electric control system and realize automatically switching.
Electric control system includes under-voltage replay KA1, undercurrent relay KA2, multiple time relay, Duo Gezhong
Between relay and three-phase alternating current；Auxiliary reclay 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 the arbitrary 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, a normally-closed contact of relay KA3 and the coil phase of power-off delay relay KT2
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 coil of the output end of the normally opened contact of relay KA4 and 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, for the monitoring of host computer.
Embodiment two：
On the basis of embodiment one, the barrel of hot well 200 is provided with the display system on the spot for showing its inside liquid level
With 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, is provided with a magnetic and floats in linker 1
Ball 2, the inwall of linker 1 is uniformly provided with multiple tongue tubes 3 from bottom to up, and each tongue tube concatenates a resistance 4 respectively,
Multigroup tongue tube and resistance connect together, and will be shown by detecting system in level value teletransmission to display screen 5.Detecting system bag
Include resistance value detector 6, in resistance value detector 6, be provided with voltmeter and ammeter, recorded by voltmeter and ammeter
Ratio through AD converter 7 by signal transmission to controller 8, controller 8 further through D/A converter 9 by numerical signal in display screen
Show in 5.Wherein, controller 8 adopts AT89S51 type single-chip microcomputer, and this series monolithic is low-power consumption, the online class that has 4KB
The single-chip microcomputer of programming flash storage, its instruction system with general 80C51 series monolithic and pin compatibility.In piece
Flash can allow to reprogram online, it is possible to use programming non-volatile memory, and it is by universal cpu and online programmable
Flash is integrated on a single die, defines powerful, using microcontroller that is flexible and having superior performance cost performance.
AD converter 7 adopts ADC0809 type converter.D/A converter 9 adopts DAC0832 type converter.Display screen 5 adopts 12864 liquid
Brilliant screen, the screen display advantage of lower cost of this dot matrix is it is adaptable to each quasi-instrument, the display field of mini-plant.
Display system includes a magnetic flap 10 being located on linker 1 barrel on the spot, and magnetic flap 10 is by multiple circles
Cylindricality magnetic sheet is sequentially arranged composition, and each cylindrical magnetic sheet is made up of the semicolumn magnetic sheet of two different magnetic, is floated by magnetic
Ball 2 and semicolumn magnetic sheet magnetic coupling realize the upset of cylindrical magnetic sheet.Two semicolumn magnetic sheets in cylindrical magnetic sheet are two
The semicolumn magnetic sheet of different colours, half is redness, and half is white, and white with red intersection is the reality in hot well 200
Border liquid level.
Embodiment three：
On the basis of embodiment one or embodiment two, also include cyclic control system, cyclic control system includes one and is located at
The high resistance electric contact 21 on hot well 200 barrel top and its internal electric shock S1, a low electricity being located at hot well 200 barrel bottom
Resistance electric contact 22 and its internal electric shock S2；Cyclic control system also includes three-phase alternating current, for the three of hot well 200 draining
Phase Induction Machines M3, the threephase asynchronous machine M4 to condenser 100 moisturizing, A.C. contactor KM1, A.C. contactor KM2, energising
Time-delay relay KT1, energization delay relay KT2；Any one exchange of three-phase alternating current is electrically connected with two phases the control connecing
Electric shock S1 that circuit processed, wherein control circuit I include mutually concatenating successively, the normally-closed contact of energization delay relay KT1 with exchange
The coil of contactor KM1, the normally opened contact of A.C. contactor KM1 with electric shock S1 phase and connects, the coil of energization delay relay KT1
With the normally-closed contact of energization delay relay KT1 and the coil phase of A.C. contactor KM1 and connect；Control circuit II includes phase successively
The coil of the electric shock S2, the normally-closed contact of energization delay relay KT2 and A.C. contactor KM2 of concatenation, A.C. contactor KM2's
Normally opened contact with electric shock S2 phase and connects, the normally-closed contact of the coil of energization delay relay KT2 and energization delay relay KT2 and
The coil phase of A.C. contactor KM2 simultaneously connects；Three-phase alternating current by three normally opened contacts of A.C. contactor KM1 with phase asynchronous
Motor M3 phase concatenates, and three-phase alternating current is concatenated with threephase asynchronous machine M4 phase by three normally opened contacts of A.C. contactor KM2.
Example IV：
On the basis of embodiment three, also include electrothermal relay KS1 and electrothermal relay KS2, the coil of electrothermal relay KS1 and three-phase
Asynchronous machine M3 phase concatenates, and the normally-closed contact of electrothermal relay KS1 is mutually concatenated with control circuit I；The coil of electrothermal relay KS2 and three
Phase Induction Machines M4 phase concatenates, and the normally-closed contact of electrothermal relay KS2 is mutually concatenated with control circuit II.It is provided with electrothermal relay, protect
Shield motor will not burn because of long term overloading.
The course of work：
When condensate pump M1 stops transport or runs under undervoltage condition, under-voltage replay KA1 or undercurrent relay KA2
Normally opened contact closure, after energization delay relay KT1 time delay Preset Time, its normally opened contact closure cause relay KA3's
Coil obtains electric, and three normally-closed contacts of relay KA3 are opened thus stopping condensate pump M1, and the normally opened contact of relay KA3 closes
Close, normally-closed contact is opened, after power-off delay relay KT2 time delay Preset Time, the line of relay KA4 after its normally opened contact closure
Enclose electric, after normally opened contact closure of relay KA4 the coil of relay KA5 obtain electric, thus the three of relay KA5 often
Open the closing of contact and start condensate pump M2, after a normally opened contact closure of relay KA4, connect Signal Terminal, for upper
The monitoring of machine.
When condensate pump M1 runs in the case of normal voltage, under-voltage replay KA1 or undercurrent relay KA2
Normally-closed contact open, now after the coil losing electricity of energization delay relay KT1, its normally-closed contact opens rear relay KA3's
Coil losing electricity, three normally opened contact closures of relay KA3, open condensate pump M1, after the normally opened contact closure of relay KA3
The coil of power-off delay relay KT2 obtains electric, and its normally-closed contact is transformed into normally opened contact and keeps, now, the line of relay KA4
Circle dead electricity, a normally-closed contact of relay KA4 opens the coil losing electricity of rear relay KA5, thus its three normally-closed contacts are beaten
Open, stop condensate pump M2, after another normally-closed contact of relay KA4 is opened, cut-off signal terminal, for the prison of host computer
Control.
When water level reaches high resistance electric contact 21, resistance diminishes, now its internal electric shock S1 closure, and on-delay continues
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 electrical equipment KT1
After closure completes self-locking, the threephase asynchronous machine M3 starting draining after remaining three normally opened contacts closure is carried out to hot well 200
Draining, when water level is less than high resistance electric contact 21, resistance becomes big, and now its internal electric shock S1 opens, due to ac contactor
The auto-lock function of device KA1, the coil of A.C. contactor KA1 still has electricity, after energization delay relay KT1 delay time arrives,
Its normally-closed contact opens the coil losing electricity causing A.C. contactor KA1, thus the three of A.C. contactor KA1 normally-closed contacts are beaten
Open, cause the threephase asynchronous machine M3 of draining to shut down.
When water level is less than low resistance electric contact 2, resistance becomes big, now its internal electric shock S2 closure, and on-delay continues
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 electrical equipment KT2
After closure completes self-locking, the threephase asynchronous machine M4 starting moisturizing after remaining three normally opened contacts closure is carried out to hot well 200
Moisturizing, when water level is higher than low resistance electric contact 22, resistance diminishes, and now its internal electric shock S2 opens, due to ac contactor
The auto-lock function of device KA2, the coil of A.C. contactor KA2 still has electricity, after energization delay relay KT2 delay time arrives,
Its normally-closed contact opens the coil losing electricity causing A.C. contactor KA2, thus the three of A.C. contactor KA2 normally-closed contacts are beaten
Open, cause the threephase asynchronous machine M4 of moisturizing to shut down.
Although to illustrate and describe the present invention referring particularly to its preferred embodiment, those skilled in the art is permissible
Understand, the model without deviating from the present invention described in appended claims for the various changes in form and details can be made
Enclose.Specific embodiment above in association with the present invention is described in detail, but is not limitation of the present invention.Every according to this
Bright technical spirit, to any simple modification made for any of the above embodiments, all still falls within the scope of technical solution of the present invention.
Claims (9)
1. a kind of device for controlling condenser hotwell liquid level, including the hot well (200) below condenser (100), its
It is characterised by：The bottom of described hot well (200) is passed through water pipe and is connected to two condensate pumps, and two condensate pumps pass through the control of electricity system
System processed is realized automatically switching；
Display system on the spot for showing its inside liquid level is provided with the barrel of described hot well (200) and by level value teletransmission
Remote transmitting system on display screen.
2. a kind of device for controlling condenser hotwell liquid level according to claim 1 it is characterised in that：Described teletransmission
System includes being provided with linker (1) on the barrel of hot well (200), is provided with a magnetic floating ball in described linker (1)
(2), the inwall of linker (1) is uniformly provided with multiple tongue tubes (3) from bottom to up, and each tongue tube concatenates an electricity respectively
Resistance (4), multigroup tongue tube and resistance connect together, and will be shown by detecting system in level value teletransmission to display screen (5).
3. a kind of device for controlling condenser hotwell liquid level according to claim 2 it is characterised in that：Described detection
System includes resistance value detector (6), is provided with voltmeter and ammeter, by voltmeter in described resistance value detector (6)
The ratio recording with ammeter through AD converter (7) by signal transmission to controller (8), controller (8) is changed further through DA
Device (9) display in display screen (5) by numerical signal.
4. a kind of device for controlling condenser hotwell liquid level according to claim 2 it is characterised in that：Described on the spot
Display system includes a magnetic flap (10) being located on linker (1) barrel, and described magnetic flap (10) is by multiple cylinders
Shape magnetic sheet is sequentially arranged composition, and each cylindrical magnetic sheet is made up of the semicolumn magnetic sheet of two different magnetic, by magnetic floating ball
(2) upset of cylindrical magnetic sheet is realized with semicolumn magnetic sheet magnetic coupling.
5. a kind of device for controlling condenser hotwell liquid level according to claim 4 it is characterised in that：Described cylinder
Two semicolumn magnetic sheets in shape magnetic sheet are the semicolumn magnetic sheet of two different colours.
6. a kind of device for controlling condenser hotwell liquid level according to claim 1 it is characterised in that：Described electricity system
Control system includes under-voltage replay KA1, undercurrent relay KA2, multiple time relay, multiple auxiliary reclay and three
Cross streams electricity；Described auxiliary reclay includes relay KA3, relay KA4 and relay KA5；The described time relay includes
Energization delay relay KT1 and power-off delay relay KT2；
The coil of described under-voltage replay KA1 is simultaneously connected in a two-phase of three-phase alternating current, described undercurrent relay KA2's
Normally opened contact in the arbitrary phase of three-phase alternating current, on described under-voltage replay KA1 and undercurrent relay KA2 for the coil tandem
It is connected with the coil of energization delay relay KT1 respectively, the normally opened contact of described energization delay relay KT1 and relay KA3
Coil be connected, three normally-closed contacts of described relay KA3 are concatenated on three-phase alternating current, for controlling condensate pump M1's
Start and stop, a normally-closed contact of 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 the input of the normally opened contact of relay KA4 is normal with one of relay KA3
Open contact to be connected, the output end of the normally opened contact of relay KA4 is connected with the coil of relay KA5, three of relay KA5 are often
Open contact to be concatenated on three-phase alternating current, for controlling the start and stop of condensate pump M2.
7. a kind of device for controlling condenser hotwell liquid level according to claim 5 it is characterised in that：Described relay
Another normally opened contact of device KA4 is connected to Signal Terminal, for the monitoring of host computer.
8. a kind of device for controlling condenser hotwell liquid level according to claim 1 it is characterised in that：Also include following
Ring control system, described cyclic control system include one be located at hot well (200) barrel top high resistance electric contact (21) and
Its internal electric shock S1, a low resistance electric contact (22) being located at hot well (200) barrel bottom and its internal electric shock S2；
Described cyclic control system also includes three-phase alternating current, for the threephase asynchronous machine M3 to hot well (200) draining, to solidifying
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 exchange of described three-phase alternating current is electrically connected with two phases and the control circuit connecing, wherein control circuit I include
The coil of the electric shock S1, the normally-closed contact of energization delay relay KT1 and A.C. contactor KM1 that mutually concatenate successively, described exchange
The normally opened contact of contactor KM1 with electric shock S1 phase and connects, the coil of described energization delay relay KT1 and energization delay relay
The coil phase of the normally-closed contact of KT1 and A.C. contactor KM1 simultaneously connects；
Control circuit II includes electric shock S2, the normally-closed contact of energization delay relay KT2 and the A.C. contactor mutually concatenating successively
The coil of KM2, the normally opened contact of described A.C. contactor KM2 with electric shock S2 phase and connects, the line of described 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 connects；
Described three-phase alternating current is concatenated with threephase asynchronous machine M3 phase by three normally opened contacts of A.C. contactor KM1, described
Three-phase alternating current is concatenated with threephase asynchronous machine M4 phase by three normally opened contacts of A.C. contactor KM2.
9. a kind of device for controlling condenser hotwell liquid level according to claim 8 it is characterised in that：Also include heat
Relay KS1 and electrothermal relay KS2, the coil of described electrothermal relay KS1 is concatenated with threephase asynchronous machine M3 phase, electrothermal relay
The normally-closed contact of KS1 is mutually concatenated with control circuit I；The coil of described electrothermal relay KS2 is concatenated with threephase asynchronous machine M4 phase, heat
The normally-closed contact of relay KS2 is mutually concatenated with control circuit II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN106444875A true CN106444875A (en) | 2017-02-22 |
| CN106444875B CN106444875B (en) | 2019-11-08 |
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