CN2452046Y

CN2452046Y - Liquid level automatic controller

Info

Publication number: CN2452046Y
Application number: CN 00225320
Authority: CN
Inventors: 李孝忠; 吕建宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-07-28
Filing date: 2000-07-28
Publication date: 2001-10-03
Anticipated expiration: 2010-07-28

Abstract

The automatic liquid level controller features its automatic control circuit comprising universal relay, power transformer, change-over switch and resistor. The automatic control device has the advantages of simple structure, low cost, no need of debugging once being installed, stable and reliable work, low failure rate and capability of selecting two working modes of manual and automatic control. Is economical and practical.

Description

The liquid level automatic controller

The utility model provides a kind of liquid level automatic controller that the liquid in container height is controlled.

At present, can be divided into two classes to automatic control of liquid level device in the container, a class is to adopt the mechanical drive water level controller of traditional float connection weight, poor reliability.Another kind of is electronic circuit controller, complex structure, failure rate height, maintenance difficult.

The purpose of this utility model is in order to overcome above-mentioned weak point, adopts general electrical equipment to constitute and provide a kind of, and simple in structure, cost is low, and working stability is reliable, the liquid level automatic controller that failure rate is low.

The purpose of this utility model is achieved in that the liquid level automatic controller comprises mounting box, it is characterized in that its automatic control circuit is made up of general relay, power transformer, switch, resistance.

Fig. 1 is the utility model structural representation;

Fig. 2 is the control circuit circuit diagram.

Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.

As shown in Figure 2, manual, the automatic change over K of the elementary serial connection of power transformer T _-1The back is an ac power input end, and secondary two ends connect low position electrode S respectively ₃, relay J transfer contact J _-2Movable end, relay J coil, resistance R ₁One end, motor stop, open indication light emitting diode D ₁, D ₂Anodal parallel connected end, the relay J coil other end connects high potential electrode S ₁, J transfer contact J _-1Movable end, R ₁The other end connects J _-1Normal-closed end, J _-1Chang Kaiduan connect in potential electrode S ₂, D ₁, D ₂Negative pole is series resistor R respectively ₂, R ₃After connect J more respectively _-2Normally closed, Chang Kaiduan, J normally closed contact J _-3Be serially connected in control circuit of motor, with K _-1The K of interlock _-2Be attempted by the two ends of starting switch in control circuit of motor.Each element is installed in the mounting box, on the panel, S ₁, S ₂, S ₃Triangularity is inserted in the container of carrying liquid, and every adjacent two back gauges guarantee that less than 150mm electrode does not touch mutually.When selecting the manual work mode, be serially connected in the normally closed contact J in the control circuit No. one time _-3Do not influence normal work.When selecting automatic working method, when in the container during no liquid, the relay J outage discharges normally closed contact J _-3Closure, motor rotation, liquid level rise and soaked middle potential electrode S ₂The time, J is akinesia still, and liquid level continues to rise to rigidly connect and touches high potential electrode S ₁The time, S ₁With S ₃Between resistance very big, J coil and R ₁The parallel branch voltage drop very low, deficiency is so that J action, when liquid level continues to rise to J coil two ends and reaches operation voltage, J action, its transfer contact J _-1Conversion disconnects R ₁, moment makes the steep rising of J coil both end voltage, guarantees the reliable adhesive of J, J _-1After the conversion, make the J self-locking, prevent perseveration, simultaneously J _-3Disconnect, cause motor to be shut down, liquid level descends, and when the J both end voltage was reduced to operation voltage gradually, J discharged, the J-1 conversion, and J loses self-locking, guarantees that J reliably cuts off the power supply, and makes a control circuit even running.

The utility model is owing to adopt above design, and control circuit adopts general electrical equipment to constitute, and simple in structure, cost is low, once installation, need not debugging, and working stability is reliable, and failure rate is low, and is economical and practical.

Claims

1, a kind of liquid level automatic controller comprises mounting box, it is characterized in that its automatic control circuit is made up of general relay, power transformer, switch, resistance, and wherein, the elementary serial connection of power transformer T is manual, automatic change over K _-1The back is an ac power input end, and secondary two ends connect low position electrode S respectively ₃, relay J transfer contact J _-2Movable end, relay J coil, resistance R ₁One end, motor stop, open indication light emitting diode D ₁, D ₂Anodal parallel connected end, the relay J level circle other end connects high potential electrode S ₁, J transfer contact J _-1Movable end, R ₁The other end connects J _-1Normal-closed end, J _-1Chang Kaiduan connect in potential electrode S ₂, D ₁, D ₂Negative pole is series resistor R respectively ₂, R ₃After connect J more respectively _-2Normally closed, Chang Kaiduan, J normally closed contact J _-3Be serially connected in control circuit of motor, with K _-1The K of interlock _-2Be attempted by the two ends of starting switch in control circuit of motor, each element is installed in the mounting box, on the panel, S ₁, S ₂, S ₃Insert in the container of carrying liquid.