CN204883401U

CN204883401U - Automatic control device of power plant's water tank

Info

Publication number: CN204883401U
Application number: CN201520695812.2U
Authority: CN
Inventors: 李婉璐
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-09-09
Filing date: 2015-09-09
Publication date: 2015-12-16
Anticipated expiration: 2025-09-09

Abstract

Automatic control device of power plant's water tank belongs to motor control field, the utility model discloses an it can not be effectively controlled to solve present power plant water tank water level, and the water level height is unable to be estimated for work efficiency greatly reduced's problem. The utility model discloses a circuit breaker QS1-QS3, electrothermal relay FR1, FR2, ac contactor KM1, KM2, auxiliary relay KA1-KA5, ULN2429A liquid level relay, transformer T and single phase bridge type rectifier circu UR, ULN2429A liquid level relay detects the water level and when low, start M1 and drive the operation of first platform water pump, when the water level is high, stops M1, starting M2 and driving the operation of second platform water pump when detecting the water level once more when low, trunning into to, when the water level is high, stop M2, two water pumps are worked in turn.

Description

The automaton of power plant's water tank

Technical field

The utility model relates to a kind of control device of two water pump alternations, belongs to Motor Control Field.

Background technology

The most unit of live and work water liquid level of power plant's skyscraper utilizes floating-type mechanical water level controller or electrode mode level controller to control electric water pump, water is extracted into building (tower) from ground reservoir and pushes up cistern, thus solve water supply problem.But floating-type mechanical water level controller volume is large, mechanical fault is many, poor reliability, electrode mode level controller, can be often out of control because of corrosion because electrode long period of soaking is in water.Cistern water level controls to be effectively controlled, and water level height cannot be estimated, work efficiency is reduced greatly, and troublesome poeration, easily makes mistakes.Namely present power plant cistern water level can not be effectively controlled, and water level height cannot be estimated, work efficiency is reduced greatly.

Summary of the invention

The utility model object can not be effectively controlled to solve present power plant cistern water level, and water level height cannot be estimated, makes the problem that work efficiency reduces greatly, provides the automaton of a kind of power plant water tank.

The automaton of power plant described in the utility model water tank, it comprises three-phase breaker QS1, three-phase breaker QS2, single-phase circuit breaker QS3, electrothermal relay FR1, electrothermal relay FR2, A.C. contactor KM1, A.C. contactor KM2, auxiliary reclay KA1, auxiliary reclay KA2, auxiliary reclay KA3, auxiliary reclay KA4, auxiliary reclay KA5, ULN2429A liquid level relay, transformer T and single phase bridge type rectifier circu UR; First water pump driving motor M1 and the second water pump driving motor M2 provides power for cistern water supply;

First water pump driving motor M1 often opens main contacts KM1-1 by electrothermal relay FR1, A.C. contactor KM1 and is connected 380V AC power with three-phase breaker QS1;

Second water pump driving motor M2 often opens main contacts KM2-1 by electrothermal relay FR2, A.C. contactor KM2 and is connected 380V AC power with three-phase breaker QS2;

Live wire L1 connects one end of one end of auxiliary reclay KA5 normally closed contact KA5-1, one end of auxiliary reclay KA4 normally opened contact, one end of auxiliary reclay KA2 normally closed contact KA2-3 and auxiliary reclay KA5 normally closed contact KA5-2 by a normal open switch of single-phase circuit breaker QS3 simultaneously;

The other end of auxiliary reclay KA5 normally closed contact KA5-1 connects one end that one end of auxiliary reclay KA1 normally opened contact KA1-1 and A.C. contactor KM1 often leave auxiliary contact KM1-2 simultaneously; The other end that the other end and the A.C. contactor KM1 of auxiliary reclay KA1 normally opened contact KA1-1 often open auxiliary contact KM1-2 is connected one end of A.C. contactor KM1 coil simultaneously, and the other end of A.C. contactor KM1 coil connects one end that electrothermal relay FR1 assists normally closed contact FR1-1;

The other end of auxiliary reclay KA4 normally opened contact connects one end of one end of auxiliary reclay KA3 normally closed contact KA3-1, one end of auxiliary reclay KA1 normally opened contact KA1-2, one end of auxiliary reclay KA3 normally opened contact KA3-2 and auxiliary reclay KA2 normally opened contact KA2-2 simultaneously; The other end and the other end of auxiliary reclay KA1 normally opened contact KA1-2 of auxiliary reclay KA3 normally closed contact KA3-1 are connected one end of auxiliary reclay KA2 normally closed contact KA2-1 simultaneously, and the other end of auxiliary reclay KA2 normally closed contact KA2-1 connects one end of auxiliary reclay KA1 coil; The other end and the other end of auxiliary reclay KA2 normally opened contact KA2-2 of auxiliary reclay KA3 normally opened contact KA3-2 are connected one end of auxiliary reclay KA1 normally closed contact KA1-3 simultaneously, and the other end of auxiliary reclay KA1 normally closed contact KA1-3 connects one end of auxiliary reclay KA2 coil;

The other end of auxiliary reclay KA2 normally closed contact KA2-3 connects one end of auxiliary reclay KA1 normally opened contact KA1-4 and one end of auxiliary reclay KA3 normally opened contact KA3-3 simultaneously, and the other end and the other end of auxiliary reclay KA3 normally opened contact KA3-3 of auxiliary reclay KA1 normally opened contact KA1-4 are connected one end of auxiliary reclay KA3 coil simultaneously;

The other end of auxiliary reclay KA5 normally closed contact KA5-2 connects one end that one end of auxiliary reclay KA2 normally opened contact KA2-4 and A.C. contactor KM2 often leave auxiliary contact KM2-2 simultaneously, the other end that the other end and the A.C. contactor KM2 of auxiliary reclay KA2 normally opened contact KA2-4 often open auxiliary contact KM2-2 is connected one end of A.C. contactor KM2 coil simultaneously, and the other end of A.C. contactor KM2 coil connects one end that electrothermal relay FR2 assists normally closed contact FR2-1;

Live wire L3 connects electrothermal relay FR1 by another normal open switch of single-phase circuit breaker QS3 simultaneously and assists the other end of the other end of the other end of normally closed contact FR1-1, auxiliary reclay KA1 coil, auxiliary reclay KA2 coil, the other end of auxiliary reclay KA3 coil and electrothermal relay FR2 to assist the other end of normally closed contact FR2-1;

The two ends of transformer T primary coil connect live wire L1 and live wire L3 respectively, the two ends of transformer T secondary coil connect two ac input ends of single phase bridge type rectifier circu UR respectively, and the cathode power supply output terminal of single phase bridge type rectifier circu UR connects one end of auxiliary reclay KA4 coil and 13 pin of ULN2429A liquid level relay simultaneously;

Shunt capacitance C1 between 5 pin of ULN2429A liquid level relay and 7 pin, shunt capacitance C2 between 10 pin of ULN2429A liquid level relay and 11 pin, shunt capacitance C4 between 8 pin of ULN2429A liquid level relay and 9 pin, 9 pin of ULN2429A liquid level relay connect level electrode, and 12 pin of ULN2429A liquid level relay connect the positive pole of electrochemical capacitor C3;

1 pin of ULN2429A liquid level relay connects 14 pin, the other end of auxiliary reclay KA4 coil, one end of auxiliary reclay KA5 coil simultaneously, the other end of auxiliary reclay KA5 coil, 3 pin of ULN2429A liquid level relay, 4 pin of ULN2429A liquid level relay and the negative pole of electrochemical capacitor C3 are connected the negative power supply output terminal of single phase bridge type rectifier circu UR simultaneously, and ground connection.

Advantage of the present utility model: the automaton structure of power plant described in the utility model water tank is simple, adopt simple discrete component, purchase cost is cheap, and does not have program controls portions, makes the stability of this device extremely strong, the frequency of later maintenance can be very low, maintenance cost has also fallen, most important employing two water pump alternations, accurate controlling water level, and decrease failure rate, be convenient for people to use.This apparatus system is easy to operate, functional, compares the needs meeting power plant's water of productive use Systematical control.

Accompanying drawing explanation

Fig. 1 is the control principle drawing of the automaton of power plant described in the utility model water tank.

Embodiment

Embodiment one: present embodiment is described below in conjunction with Fig. 1, the automaton of power plant's water tank described in present embodiment, it comprises three-phase breaker QS1, three-phase breaker QS2, single-phase circuit breaker QS3, electrothermal relay FR1, electrothermal relay FR2, A.C. contactor KM1, A.C. contactor KM2, auxiliary reclay KA1, auxiliary reclay KA2, auxiliary reclay KA3, auxiliary reclay KA4, auxiliary reclay KA5, ULN2429A liquid level relay, transformer T and single phase bridge type rectifier circu UR; First water pump driving motor M1 and the second water pump driving motor M2 provides power for cistern water supply;

Single phase bridge type rectifier circu UR is made up of four diodes.

Principle of work: for starting work, QS1, QS2 and QS3 are closed a floodgate, by the duty of ULN2429A liquid level relay control circuit, when the height of water level of water tank is lower than level electrode, through internal delay time circuit function, after time delay a period of time, 1,14 pin output low levels of ULN2429A liquid level relay, now KA4 coil obtains electric, and the KA4 normally opened contact on Article 2 circuit closes, connected this circuit, then KA1 coil obtains electric; Then its normally opened contact KA1-2 closes self-locking; Meanwhile, KA1-4 closes, and KA3 coil is obtained electric, KA3-3 closes self-locking, for KA2 work is next time prepared; KA3 coil obtains electric, and its normally closed contact KA3-1 disconnects, and makes KA1 coil in upper once prohibited acts; KA3-2 closes, and for next KA2 coil obtains electric preparing, because KA2 action, KM2 coil can be made to obtain electric adhesive, and the main contacts of KM2 closes, and allows M2 start running.

Meanwhile, because KA1 coil obtains electric, then KA1-1 closes, and KM1 coil obtains electric adhesive, and KM1-2 closes self-locking, and meanwhile, because KM1 coil obtains electric, its main contacts KM1-1 closes, and motor M 1 works, and driving First pump working, is cistern water supply.

When the water level of water tank rises to higher than level electrode, 1 pin of ULN2429A liquid level relay and 14 pin export high level, KA4 coil losing electricity, and KA5 coil obtains electric, its contact KA5-1 disconnects, and has cut off KM1 coil power, and KM1 coil blackout discharges, its main contacts KM1-1 disconnects, and motor M 1 shuts down.

When the water level of water tank is down to below level electrode again, KA4 coil is electric adhesive again, and its normally opened contact closes again, connected KA2 coil power, and KA2-2 closes self-locking; KA2-3 disconnects simultaneously, has cut off the power supply of KA3 coil, and KA3 coil blackout discharges, its all contact reinstatement state, for KA1 work is next time prepared, because KA1 coil obtains electric adhesive, KA1-1 closes, KM1 coil can be made to obtain electric adhesive, and KM1-1 closes, and M1 drives First pump working; Meanwhile, because KA2 coil obtains electric, KA2-4 closes, and KM2 coil obtains electric, and its main contacts KM2-1 closes, and allows M2 work, drives second pump operation.

When the water level of water tank rises to above level electrode again, KA5 coil obtains electric, and its contact KA5-2 disconnects, and has cut off KM2 coil power, and KM2 coil blackout discharges, and its main contacts KM2-1 disconnects, and motor M 2 shuts down.

Now, the whole power-off release of KA1, KA2, KA3 coil, recovers virgin state, prepares for connecting KM1 coil next time, namely prepares for starting M1 next time, thus achieves the course of work of two water pump alternate runs.Due to two water pump alternate turns work, significantly reduce failure rate.Due to the height that controlling water level is being applicable to, ensure that the activity at water source, sanitary condition is good.

Claims

1. the automaton of power plant's water tank, it is characterized in that, it comprises three-phase breaker QS1, three-phase breaker QS2, single-phase circuit breaker QS3, electrothermal relay FR1, electrothermal relay FR2, A.C. contactor KM1, A.C. contactor KM2, auxiliary reclay KA1, auxiliary reclay KA2, auxiliary reclay KA3, auxiliary reclay KA4, auxiliary reclay KA5, ULN2429A liquid level relay, transformer T and single phase bridge type rectifier circu UR; First water pump driving motor M1 and the second water pump driving motor M2 provides power for cistern water supply;

2. the automaton of power plant according to claim 1 water tank, is characterized in that, single phase bridge type rectifier circu UR is made up of four diodes.