CN2133868Y

CN2133868Y - Automatic electronic controller for liquid level

Info

Publication number: CN2133868Y
Application number: CN 92211749
Authority: CN
Inventors: 夏方华; 夏超
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-04
Filing date: 1992-05-04
Publication date: 1993-05-19
Anticipated expiration: 2002-05-04

Abstract

The utility model relates to an automatic electronic controller for liquid level, mainly comprising a liquid level switch part, an automatic control part and a motor starting part. The utility model has the advantages of high level of automatization, simple structure, small size, stable operation, low manufacture cost, convenient operation, ideal practicality, etc.

Description

Automatic electronic controller for liquid level

The utility model relates to a kind of fluid level control device, and particularly a kind of electronic level automaton is adapted to the automatic control of water and other liquid level.

At present, be used in the society that the control device of liquid level is had many kinds, as the float-type liquid level control device, head tank fluid level control device etc.The float-type liquid level control device has complex structure, big, the job insecurity of volume, easy break-down, the shortcoming that manufacturing cost is high.The head tank fluid level control device does not exist only in above-mentioned shortcoming and also has certain limitation of use and the big shortcoming of maintenance difficulty.In a word, do not find also socially that at present a kind of desirable promptly simple stable again practical automatic control of liquid device is arranged.

Task of the present utility model be to provide a kind of automaticity height, simple in structure, volume is little, working stability, low cost of manufacture, easy to use, be convenient to keep in repair, desirable, practical novel electron automatic control of liquid device.

Task of the present utility model realizes with following scheme: accompanying drawing has provided electrical schematic diagram of the present utility model.N is that water tank, A ' are last liquid level line electrode in the accompanying drawings, and B ' is that liquid level line electrode, C ' are end liquid level line electrode down, and A ' B ' C ' three liquid level line electrodes adopt copper conductor or aluminum conductor to process.R is the resistor of 2K Ω, R ₁Resistor for 10K Ω.W ₁Potentiometer, W for 100K Ω ₂Resistor for 47K Ω.It is the voltage stabilizing diode of 0.3-0.6 volt that WD adopts the voltage stabilizing value.BG ₁The employing model is 3DG ₆Transistor, BG ₂The employing model is 3DK ₄Or 3DG ₁₂Transistor.C ₁Adopting electric capacity is 100 μ f, withstand voltage 10 volts electrolytic condenser, C ₂Adopting electric capacity is 470 μ f, withstand voltage 16 volts electrolytic condenser.It is that 1N4004, commutated current are 1 ampere that D adopts model, withstand voltage commutation diode greater than 20 volts.It is the relay of JRX or JQX that J adopts model, and JA is the normally closed contact of relay J, and JB is the normally opened contact of relay J.B is a power transformer, and 1,2 ends are the winding with 6 volts of voltage output functions, and 3,4 ends are the winding with 12 volts of voltage output functions, and 5,6 ends are the input winding.CJ is A.C. contactor, CJ _bBe the normally closed contact of A.C. contactor CJ, CJ _a, CJ- ₁, CJ- ₂, CJ- ₃Normally opened contact for A.C. contactor CJ.XD ₁, XD ₂Be pilot lamp.D ₁, D ₂, D ₃, D ₄, D ₅Be fuse.K is a knife switch.K ₀Switch for electrothermal relay.D ₆Be motor.

The utility model mainly contains three parts and forms with reference to the accompanying drawings: three liquid level line electrode A that water tank N arranged and place water tank ', the level switch part that constitutes of the liquid of B ', C ' and water tank, mainly by transistor BG ₁, BG ₂With the automatic control section of relay J formation, mainly by motor D ₆A.C. contactor CJ and electrothermal relay constitute the motor start-up part.

Below with reference to accompanying drawing concrete structure of the present utility model is described as follows:

Three liquid level line electrode A ', B ', C ' vertically place water tank N, and the end of end liquid level line electrode C ' place water tank bottom, down the liquid level line electrode B ' an end place the pre-determined liquid level line position (as accompanying drawing b position) down of water tank, go up the liquid level line electrode A ' an end place the pre-determined liquid level line position (as accompanying drawing a position) of going up of water tank.The other end of end liquid level line electrode C ' is connected with the positive terminal of power supply.Following liquid level line electrode B ' the other end and the normally closed contact J of relay J _AMovable end be connected.Last liquid level line electrode A ' the other end and the normally closed contact J of relay J _AStiff end be connected and after resistor R with potentiometer W ₁Movable end be connected.Potentiometer W ₁Two stiff ends meet transistor BG with the negative pole of its stabilivolt after stabilivolt WD is in parallel ₁Base stage, anodal termination common port.Transistor BG ₁And BG ₂Emitter be connected with common port respectively.BG ₁Collector and BG ₂Base stage be connected and pass through resistor R ₁With potentiometer W ₂The back is connected with power supply.BG ₂Collector by being parallel with capacitor C ₁The actuating coil of relay J after be connected with power supply.The 12V of transformer B exports winding power supply as level switch and automatic control section after diode D rectification.The normally opened contact CJa of A.C. contactor CJ and normally closed contact CJ _bBe connected in series pilot lamp XD respectively ₁And XD ₂After be connected on the output winding of 6V of transformer B.The A of three-phase supply, B, C are through knife switch K, fusing D ₃, D ₄, D ₅After respectively with three groups of normally closed contacts of electrothermal relay and three groups of normally opened contact CJ-of A.C. contactor ₁, CJ- ₂, CJ- ₃Meet motor D6 after the serial connection.Exchange the K switch of an end of the actuating coil that contacts CJ by electrothermal relay ₀With fuse D ₂The back with B mutually power lead be connected, the other end by the normally opened contact JB of relay J after with C mutually power lead be connected.The power input line circle of transformer B and mutually electric former being connected of A.

Below with reference to accompanying drawing principle of work of the present utility model is described as follows:

With reference to the accompanying drawings, the electronic level automaton will be in and treat duty after connecting three-phase supply, and the liquid levels of at this moment establishing in the water tank is lower than the b position line, because electrode A ' and B ' all do not touch liquid, therefore, electrode A ' and B ' all be in the zero potential state, transistor BG ₁No base stage bias current and end BG ₁The current collection collection be in high level, make BG ₂Conducting, relay J adhesive, the normally opened contact JB closure of relay, A.C. contactor CJ work, its CJ- ₁, CJ- ₂, CJ- ₃Closure is connected three-phase supply, makes motor D ₆Work drives pump working and draws water, simultaneously the normally opened contact CJ of relay _aClosed pilot lamp XD ₁Lighting the demonstration water pump works; The normally closed contact CJ of relay _bOpen, pilot lamp is not lighted.When the liquid level in the water tank is elevated to the b position line, electrode B ' touch liquid, at this moment electrode A ' the do not touch normally closed contact J of liquid and relay J _ASo be the transistor BG that disconnects ₁Still be in cut-off state, water pump continues to draw water.When the liquid level in the water tank is elevated to a position line, electrode A ' touch liquid, at this moment power supply by electrode C ' → liquid → electrode A ' → resistor R → potentiometer W ₁Be added in transistor G behind the → stabilivolt WD ₁Base stage and emitter between, make BG ₁Conducting, BG ₁Collector become low level, make BG ₂Be in cut-off state, the actuating coil dead electricity of relay J, its normally opened contact disconnects, the normally closed contact closure, the actuating coil dead electricity of A.C. contactor CJ, motor quit work, and water pump stops pumping.While pilot lamp XD ₁Extinguish, XD ₂Light, show that the liquid of tank port is full.Along with the constantly outside supply fluid of water tank, liquid level constantly descends, and repeats the above-mentioned course of work when liquid level drops to the b position line again.But the said process Automatic Cycle is carried out, thereby has realized that the utility model controls the purpose of liquid level automatically.

The utility model takes that the actuating coil with A.C. contactor CJ is connected in the wherein two-phase in the three-phase supply, another power supply transformation B power supply as power transformer B that joins of three-phase supply; three-phase supply is as long as lack a phase like this; motor is not just worked, and has realized the purpose to motor phase failure protection.Simultaneously for realizing that overcurrent protection has been connected in series electrothermal relay in three-phase power line.

Claims

A kind of mainly contain water tank N and place three liquid level line electrode A of water tank ', the level switch part that constitutes of the liquid of B ', C ' and water tank, by transistor BG ₁, BG ₂The electronic level automaton that the automatic control part branch that constitutes with relay J etc. is formed is characterized in that:

Three liquid level line electrode A ', B ', C ' vertically place water tank N, and the end of end liquid level line electrode C ' place water tank bottom, down the liquid level line electrode B ' an end place the pre-determined liquid level line position down of water tank, go up the liquid level line electrode A ' an end place the pre-determined liquid level line position of going up of water tank, the other end of end liquid level line electrode C ' is connected with the positive terminal of power supply, following liquid level line electrode B ' the other end and the normally closed contact J of relay J _AMovable end be connected, last liquid level line electrode A ' the other end and the normally closed contact J of relay J _AStiff end be connected and after resistor R with potentiometer W ₁Movable end be connected potentiometer W ₁Two stiff ends meet transistor BG with the negative pole of its stabilivolt after stabilivolt WD is in parallel ₁Base stage, anodal termination common port, transistor BG ₁And BG ₂Emitter be connected BG respectively with common port ₁Collector and BG ₂Base stage be connected and pass through resistor R ₁With potentiometer W ₂The back is connected BG with power supply ₂Collector by being parallel with capacitor C ₁The actuating coil of relay J after be connected with power supply, as the level switch and the power supply of control section automatically, the A of three-phase supply, B, C are through knife switch K, fusing D after diode D rectification for the 12V output winding of transformer B ₃, D ₄, D ₅After meet motor D6 respectively with after three groups of normally opened contact CJ-1, CJ-2, CJ-3 of three groups of normally closed contacts of electrothermal relay and A.C. contactor are connected in series, exchange the K switch of an end by electrothermal relay of the actuating coil of contact CJ _oWith fuse D ₂The back with B mutually power lead be connected, the other end by the normally opened contact JB of relay J after with C mutually power lead be connected the power input line circle of transformer B and mutually electric former being connected of A.