CN2248351Y

CN2248351Y - Full-automatic water level controller

Info

Publication number: CN2248351Y
Application number: CN 95208520
Authority: CN
Inventors: 翁旭明
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-10
Filing date: 1995-04-10
Publication date: 1997-02-26
Anticipated expiration: 2005-04-10

Abstract

The utility model provides a full-automatic water level controller, which is composed of an electrical leakage circuit, an overload short-circuit, a phase-lose protection circuit, an on-off outside line phase-lose over current protection circuit of a main circuit, a phase-lose monitoring circuit of a main circuit, a liquid level control circuit of an upper water storage tank and a liquid level control circuit of a lower water storage pool. The liquid level control circuit of an upper water storage tank and the liquid level control circuit of a lower water storage pool respectively carry out the monitoring to the water level of the upper water storage tank and the lower water storage pool at the same time. So the phenomenon of frequent free running of seasonal water pumps is overcome effectively. The utility model also uses the electrical leakage circuit, the overload short-circuit and the phase-lose protection circuit to achieve the action of duplicate protection to an outside line power supply and an inner main circuit phase failure. So a three-phase motor is effectively protected from destruction.

Description

The full-automatic water level controller

The utility model relates to a kind of electromechanical controller, particularly a kind of full-automatic water level controller.

In recent years, quickening along with the modernization construction paces, high building in all parts of the country stands in great numbers, fire-fighting, the water level controller of potable water is indispensable auxiliary facility, water level controller is to go up reserve tank and the unattended automaton of following cistern, and present, common water level controller has three kinds: i.e. pressure type, float-ball type, electric pole type, all there are two big defectives in these devices: 1, no device for automatically controlling, have only semi-automatic controller, promptly only last reserve tank is controlled, no matter whether cistern has water down, as long as the decline of water table that goes up reserve tank is to the pressure of adjusting or the water level limit, with regard to energized, start water pump, cause water pump to be in idling conditions easily like this, burn motor, particularly the dry season in midsummer, pipe network water is forced down, and liquid measure is little, water pump often is in idling conditions, has quickened the wearing and tearing of body and the waste of electric power.2, no open phase protection; the breaking-up of threephase motor winding; have more the phase failure in three-phase supply; and water plant polyphyly unmanned; make that to burn winding be common thing because of exterior line power supply or the caused threephase motor of the interior main circuit phase failure are owed to move mutually, cause great loss for the country and people's property.

In order to overcome above-mentioned deficiency, the purpose of this utility model provides a kind of full-automatic water level controller with device for automatically controlling and open-phase protection.

The purpose of this utility model is realized by following technical proposals.

The utility model is by electric leakage; the overload short circuit; the phase failure protection circuit; main circuit opens and closes outside line and owes the phase circuit overcurrent protection; main circuit is owed the phase monitoring circuit; the cistern liquid level control circuit was formed under last reserve tank liquid level control circuit reached; electric leakage; the overload short circuit; the input end of phase failure protection circuit is connected with three-phase supply; the signal of its output terminal output is input to main circuit keying outside line respectively and owes the phase circuit overcurrent protection; in last reserve tank liquid level control circuit and the following cistern liquid level control circuit; the signal of last reserve tank liquid level control circuit and cistern liquid level control circuit output down all is input to main circuit keying outside line and owes the phase circuit overcurrent protection; main circuit opens and closes outside line and owes the signal of phase circuit overcurrent protection output and owe phase monitoring circuit one tunnel through main circuit and feed back to electric leakage; the overload short circuit; the phase failure protection circuit, motor is exported on another road.

Since of the present utility model go up the reserve tank liquid level control circuit and down the cistern liquid level control circuit respectively the water level of last reserve tank and following cistern is monitored simultaneously, when the water level of last reserve tank rise to adjust the limit or down the decline of water table of cistern to adjusting the limit, water pump is out of service immediately, allow reserve tank keep certain water level always, enough hydraulic pressure is arranged for fire-fighting and life usefulness with assurance, thereby effectively overcome the phenomenon that seasonal water pump often dallies; The utility model has utilized electric leakage, overload short circuit, phase failure protection circuit simultaneously, has reached the double protection of the exterior line power supply and the interior main circuit phase failure, thereby has effectively protected threephase motor not destroyed.The utility model circuit is simple, and is similar with the commercially available prod cost, but multiple functional, and the relay protection link is tight, uses through for many years, proves safe and reliablely, is unattended desirable-auto opertaing device.

Below will be described in further detail the utility model by specific embodiment.

Fig. 1 is the utility model circuit block diagram.

Fig. 2 is the utility model circuit theory diagrams.

Fig. 3 is water-level control circuit figure.

As Fig. 1, Fig. 2, shown in Figure 3, the utility model is by the short circuit of electric leakage overload, the phase failure protection circuit, main circuit opens and closes outside line and owes the phase circuit overcurrent protection, main circuit is owed the phase monitoring circuit, the cistern liquid level control circuit was formed under last reserve tank liquid level control circuit reached, the short circuit of electric leakage overload, the phase failure protection circuit is the zero sequence current mutual inductor that electric current action type electromagnetic type mine rapid electric leakage protection device DZU is mainly made by high permeability material, leakage tripping device is formed with the isolating switch that has overload and short-circuit protection, when if overload or short circuit take place in the motor in the main circuit, the electromagnetic release action of isolating switch is cut off the electricity supply; When if interior main circuit is owed to move mutually, owe phase signals as long as owe one of phase surveillance input, zero-sequence transformer is owing to the effect of zero-sequence current, and the leakage tripping device action makes circuit breaker trip.When protected circuit had the electric leakage or the person to get an electric shock, its electric leakage or shock current reached the action current value, and the zero sequence current mutual inductor Secondary Winding is just exported a signal, cuts off the electricity supply by leakage tripping device, the protective effect that reaches electric leakage and get an electric shock.It is by A.C. contactor C, electrothermal relay JR, double-throw switch HY, button switch QA, TA, single-throw switch JJ that the phase circuit overcurrent protection is owed in main circuit keying outside line _k, time relay JS ₁Form, when circuit double-throw switch HY places automated location, when the electrode handle SEA LEVEL VARIATION signal separately among last reserve tank A and the following cistern B passes to liquid level control circuit, relay J J ₁, JJ ₂Send start-up command to native system immediately, through time relay JS ₁After the time-delay, A.C. contactor C work, electric motor starting; Go up thresold when the water level of last reserve tank rises to contact, the decline of water table of following cistern in leaving during the control utmost point, liquid level relay JJ ₁, JJ ₂Signal according to each self-electrode transmits sends halt instruction to this circuit simultaneously, and A.C. contactor C is dead electricity therefore, discharges main contact, the motor stall.It is by relay SJ that main circuit is owed the phase monitoring circuit ₁, SJ ₂, time relay sj ₂Form contact 2X in main circuit ₁, 2X ₂, 2X ₃Below when arbitrarily phase line disconnects, relay SJ ₂Dead electricity immediately, it often makes war 27,1X ₁Recover normally closed, when residual current circuit breaker DZU obtained phase failure signal, the tripping of three-phase contact was cut off the electricity supply, and makes the motor stall.Last reserve tank liquid level control circuit reaches down, and the cistern liquid level control circuit is by liquid level relay JJ ₂, JJ ₁And two groups of signal electrodes form, and every group of signal electrode is made up of last thresold, the middle control utmost point and following thresold, and two groups of signal electrodes place respectively in reserve tank and the following cistern, and respectively with liquid level relay JJ ₂, JJ ₁Three corresponding contacts connect, respectively last reserve tank and following cistern are monitored.

Pump work: when not having water or decline of water table in leaving, to control the utmost point in the last reserve tank, following thresold and upper limit interpolar water resistance infinity, triode BG ₁Base potential reduces, BG ₁End BG ₂Because of base potential improves conducting, relay J J ₂Must be electric,

contact

17,21 closures are carried out to start and are prepared; Instantly the water level of cistern rises when touching thresold, and the water resistance of following thresold and upper limit interpolar is very little, BG ₃Conducting, BG ₄Because of descending, base potential ends JJ ₁Contact 1,3 keeps first closure state, starting mode of pump.

Pump stops: 1, when thresold was gone up in the water level rising contact of last reserve tank, the water resistance of following thresold and upper limit interpolar was very little, triode BG ₁Base potential improves, BG ₁Conducting, BG ₂Because of descending, base potential ends JJ ₂Contact 17,21 disconnects, and is out of service.When 2, the decline of water table of cistern is controlled the utmost point in leaving instantly, the water resistance infinity of following thresold and upper limit interpolar, BG ₂Base potential reduces, BG ₃End BG ₄Because of base potential improves conducting, JJ ₄Must be electric,

contact

1,3 disconnects, and water pump is out of service.

Its Control work principle is: 1, water level control.HY places automated location with double-throw switch, and the water level of cistern rises to and touches thresold instantly, liquid level relay JJ ₁When receiving the thresold signal,

contact

1,3 closures, time relay JS ₁Must be electric,

contact

7,9 time closings are for upwards reserve tank water supply is ready; When the decline of water table of last reserve tank is controlled the utmost point, liquid level relay JJ in leaving ₂When controlling utmost point signal in receiving, contact 17,21 closures, at this moment

control loop contact

1X ₁, 7,9,11,23,21,17,1X ₃Closed completely, the motor rotation water pump reserve tank that makes progress supplies water, and along with water level rises gradually, touches thresold, liquid level relay JJ when water level rises ₂When receiving the thresold signal, contact 17,21 disconnects, ac contactor coil C dead electricity, and main contact C cuts off three-phase supply, and electricity quits work mutually; If the decline of water table of following cistern is controlled the utmost point, liquid level circuit breaker JJ in leaving ₁When controlling utmost point signal in receiving, contact 1,3 disconnects, no matter whether last reserve tank has water, water pump all will quit work, thereby has prevented the generation of dry season water pump idle running phenomenon.Because the electrode in last reserve tank and the following cistern is constantly to liquid level relay JJ ₂, JJ ₁The information of SEA LEVEL VARIATION separately is provided, makes liquid level relay JJ ₂, JJ ₁The contact break-make, only guaranteed on the cistern water level rises contact down thresold, on when the decline of water table of reserve tank controls the utmost point in leaving, water pump is devoted oneself to work automatically, the contact of rising of the decline of water table of following cistern the control utmost point or water level of going up reserve tank in leave is gone up under the situation of thresold, water pump just shuts down, like this, guaranteed that well the water level of last reserve tank is between the thresold and the middle control utmost point always, to guarantee enough hydraulic pressure being arranged for fire-fighting and domestic water.For preventing that liquid level relay, the time relay from can not normally carry out because of damage causes the work of automatic link, the spy is provided with hand gear, and last storage tank such as need draw water, and earlier double-throw switch HY is pushed manual position, and single-throw switch JJ closes _K, by starting button OA, A.C. contactor C gets electric, and the self-locking machine operation is taken out fullly when the water of last reserve tank, by stopping button TA, makes A.C. contactor C dead electricity, and motor quits work.2, owe to move mutually duplicate protection.(1) external power is owed phase: foreign minister's power supply means residual current circuit breaker DEU contact X ₁, X ₂, X ₃Circuit in addition, liquid level relay JJ in this control loop ₁, JJ ₂With time relay JS ₁, two ends be connected on residual current circuit breaker DZU contact 1X respectively ₁, 1X ₂On, and A.C. contactor C coil one terminate at 1X on the residual current circuit breaker DZU contact ₁On, the other end then is connected on residual current circuit breaker DZU contact 1X ₃On, therefore, motor is in operation, and external power any a disconnection suddenly mutually all can make A.C. contactor C coil dead electricity immediately, and main contact C disconnects, and the motor stall reaches the purpose of external power phase failure protection.This situation has also disconnected normal C battle (13,15) simultaneously when ac contactor coil C dead electricity, make time relay JS2 dead electricity, contact X ₁, 27 disconnect, so residual current circuit breaker can not trip, in case external power recovers normally, motor can put into operation again automatically.(2) interior main circuit is owed phase: interior main circuit refers to the ablation of A.C. contactor C main contact individual contacts, A.C. contactor C main contact 2X ₁, 2X ₂, 2X ₃Be connected feeder line with thermal cutout JR and get loose, the thermal element of thermal cutout JR comes off, and the continue thermal element of device JR of heat comes off, and electrothermal relay JR is to motor D ₁, D ₂, D ₃The upper end connects feeder line and gets loose etc.At this, when disconnecting mutually arbitrarily in the main circuit, exchange and touch C work as usual, its 13,15 closures of often making war, time relay JS ₂The duty that still becomes, delayed contact JS ₂(X ₁, 27) keep adhesive because relay SJ ₁, SJ ₂The coil two ends all are connected on respectively on three phase lines of main circuit, so, relay SJ ₂After receiving phase failure signal simultaneously, because of dead electricity makes its normally closed some SJ ₂(27,1X ₃) recover normally closed, this moment residual current circuit breaker X ₁, 27,1X ₃The loop is closed completely, because the effect of zero-sequence current, residual current circuit breaker trips immediately, cuts off three-phase supply, and motor shuts down.

Claims

1; a kind of full-automatic water level controller; it is by electric leakage; the overload short circuit; the phase failure protection circuit; main circuit opens and closes outside line and owes the phase circuit overcurrent protection; main circuit is owed the phase monitoring circuit; the cistern liquid level control circuit was formed under last reserve tank liquid level control circuit reached; it is characterized in that the short circuit of electric leakage overload; the input end of phase failure protection circuit is connected with three-phase supply; the signal of its output terminal output is input to main circuit keying outside line respectively and owes the phase circuit overcurrent protection; last reserve tank liquid level control circuit reaches cistern liquid level control circuit down; the signal of last reserve tank liquid level control circuit and cistern liquid level control circuit output down all is input to main circuit keying outside line and owes the phase circuit overcurrent protection; main circuit opens and closes outside line and owes the signal of phase circuit overcurrent protection output and owe phase monitoring circuit one tunnel through main circuit and feed back to electric leakage; the overload short circuit; the phase failure protection circuit, motor is exported on another road.

2, full-automatic water level controller according to claim 1 is characterized in that electric leakage overload short circuit phase failure protection circuit is electric current action type electromagnetic type mine rapid electric leakage protection device DZU.

3, full-automatic water level controller according to claim 1 is characterized in that it is by A.C. contactor C, electrothermal relay JR, double-throw switch HY, button switch QA, TA, single-throw switch JJ that the phase circuit overcurrent protection is owed in main circuit keying outside line _kAnd time relay J S ₁Form.

4, full-automatic water level controller according to claim 1 is characterized in that it is by relay SJ that main circuit is owed the phase monitoring circuit ₁, SJ ₂And time relay J S ₂Form.

5, full-automatic water level controller according to claim 1, the cistern liquid level control circuit is by liquid level relay JJ to it is characterized in that reaching down by the reserve tank liquid level control circuit ₂, JJ ₁And two groups of signal electrodes form, and every group of signal electrode is made up of last thresold, the middle control utmost point and following thresold, and two groups of signal electrodes place respectively in reserve tank and the following cistern, and respectively with liquid level relay JJ ₂, JJ ₁Three contacts connect.