CN2514044Y - Automatic controller for pumping water in water tower - Google Patents

Abstract

The utility model relates to an automatic controller for pumping water in a water tower, which comprises a water level detecting device composed of a plurality of detecting electrodes, a control unit, a drive circuit and a pumping electric motor, wherein the water level detecting device is arranged in the water tower. The control unit is formed by the connection of a first trigger, a second trigger and a third trigger, the first trigger is provided with a display circuit, and the second and the third triggers are respectively provided with a delay control circuit. A trigger signal input end of the second trigger is connected with the signal input end of the first trigger through a transistor switch circuit. Compared with the prior art, the utility model has the functions of automatically switching off and displaying water level of the water tower. The device has simplicity, practicality and convenient connection, and the utility model is convenient for being popularized and used under various environments.

Description

The water tower automatic controller that draws water

Technical field

The utility model relates to a kind of controller that water tower draws water that is used for.

Background technology

In existing water tower pumping controller, the float-ball type controller damages easily, reveals owing to adopted mechanical components such as float valve, lever, and poor reliability is eliminated at present gradually; And level sensing formula controller, not only circuit structure complexity, and Installation and Debugging is loaded down with trivial details, and environment for use is had relatively high expectations.What actual at present use was more is the electrode probe type controller, as " the practical circuits principle is rapid-result with design " (Fujian science tech publishing house, the 206-207 page or leaf) disclosed a kind of water tower pumping control circuit (shown in Figure 1), it comprises by hanging on sheet metal a, the b in the water tower, the level detecting device that c forms, the control module of being made up of time-base integrated circuit NE555 and peripheral cell is by transistor circuit T ₀And relay J ₀The drive circuit of forming, and pumping motor W ₀When the water level in the tower when sheet metal b is following, motor W ₀Startup is drawn water, and water level rises, and shuts down when meeting sheet metal c; When drawdown, in the time of must dropping to sheet metal b and break away from the water surface, motor just can start once more and draws water.This pumping controller weak point is: 1. level detecting device connects with many leads and need distinguish polarity.2. can't show the height of water level in the tower, be difficult to monitoring.3. when the water source lack of water or the system failure, disable motor makes motor dally, cause energy waste for a long time, even burns, the generation accident automatically.Now, in the water plug that has, employing is provided with the method for probe respectively at water tower and place, water source, prevent motor idle running, and this device is installed numerous and diverse, poor practicability.

Summary of the invention

The purpose of this utility model is that design a kind ofly has the water level Presentation Function, can effectively prevent motor idle running, the easy-to-install water tower automatic controller that draws water.

For this purpose, the utility model adopts following design scheme: the water tower automatic controller that draws water, comprise the level detecting device of forming by a plurality of exploring electrodes of being located in the water tower, control module, drive circuit, and pumping motor, level detecting device is imported triggering signal to control module, and control module is by drive circuit control pumping motor duty.Control module among the design is made of first trigger that is provided with water level display circuit and second, third trigger of being provided with delay control circuit, the signal input part of first trigger is connected with level detecting device, the power end of second trigger is connected with the signal output part of first trigger, its signal output part is connected with the power end of the 3rd trigger, and the signal output part of the 3rd trigger is connected with drive circuit; The signal input part of second trigger is connected by the signal input part of transistor switching circuit with first trigger.

First, second, third trigger is that core constitutes with first, second, third timer respectively, the threshold value end of first timer links to each other with trigger end and forms the signal input part of first trigger, and the threshold value end of second, third timer links to each other with its charging end and forms the signal input part of second, third trigger; The exploring electrode of level detecting device is two groups, is connected by the signal input part of amplifying circuit with first trigger; Water level display circuit is serially connected with between the signal input part and its earth terminal of first trigger, comprise mu balanced circuit and display.The delay control circuit of second, third trigger comprises signal input part and the charging resistor between its power end, the signal input part that is connected in second, third trigger and the charging capacitor between the earth terminal that is connected in second, third trigger, and transistor switching circuit comprises the triode that base stage is connected with the signal input part of first trigger, colelctor electrode is connected with the signal input part of second trigger.

This controller compared with prior art has following characteristics: 1. level detecting device is connected with control module only needs two leads, and need not to distinguish polarity, connects easy, quick.The height of water level that 2. can show water tower is convenient to monitoring.3. have the function of automatically shutting down, both can prevent the pumping motor idle running damage, but energy conservation again.4. this device is simple and practical, is convenient to apply at various environment.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the schematic diagram of existing water tower pumping controller.

Fig. 2 is the draw water circuit theory diagrams of automatic controller of the water tower of the utility model design.

The specific embodiment

As shown in Figure 2, the design's the water tower automatic controller that draws water is the improvement to existing water tower pumping controller among Fig. 1.This water tower draws water automatic controller by level detecting device, control module, and drive circuit, compositions such as pumping motor W and aqueduct, water pump, wherein drive circuit comprises triode T ₃, relay J and peripheral cell, close, open the running of control pumping motor W or stop by relay J.

The level detecting device 6 that is installed in the water tower is made up of two groups of exploring electrodes of A, B, and wherein B group exploring electrode comprises the electrode L of a plurality of different lengths ₁, L ₂, L ₃, L ₄, L ₅, and be serially connected with the resistance R of different resistances between these electrodes ₁, R ₂, R ₃, R ₄All electrodes are telescopic adjustment, as telescopic antenna formula structure, with the water tower that satisfies differing heights and the requirement of different pump-outs.

Control module comprises first trigger 1, second trigger 2, the 3rd trigger 3, and wherein first trigger 1 is with timer IC ₁Be the Schmidt trigger of core composition, i.e. timer IC ₁Threshold value end R be connected with trigger end S; Second trigger 2, the 3rd trigger 3 all are with timer IC ₂, IC ₃Be the monostable flipflop of core composition, i.e. timer IC ₂, IC ₃Threshold value end R link to each other with charging end Q '.Timer IC ₁, IC ₂, IC ₃Adopt integrated circuit NE555.Timer IC ₁Signal output part Q and timer IC ₂Power end E _C, timer IC ₂Signal output part Q and timer IC ₃Power end E _C, timer IC ₃Signal output part Q and triode T ₃Base stage connect according to this, constitute the transmission channel of control signal with this.

In the present embodiment, level detecting device 6 is by triode T by one ₁The amplifying circuit that constitutes is connected with control module, i.e. A group exploring electrode and triode T ₁Base stage connect, B group exploring electrode and triode T ₁Colelctor electrode and timer IC ₁Power end E _CConnect triode T ₁Emitter stage and timer IC ₁Threshold value end R, trigger end S connect.Water level display circuit 4 is serially connected with timer IC ₁Between threshold value end R, trigger end S and the common ground end, it is made up of mu balanced circuit and display, and mu balanced circuit is by a plurality of diode D in this example ₂, D ₃Serial connection utilizes the forward voltage drop characteristic of diode to play dividing potential drop, pressure stabilization function; Display adopts voltmeter to convert.

In second trigger, timer IC ₂Trigger end S pass through resistance R ₅, capacitor C ₅Be connected with its power end, earth terminal respectively, its delay control circuit comprises resistance R ₆And capacitor C ₆In the 3rd trigger, timer IC ₃Trigger end S pass through resistance R ₁₀, capacitor C ₁₀Be connected with its power end respectively, earth terminal, its delay control circuit comprises resistance R ₇And capacitor C ₇Transistor switching circuit 5 comprises triode T ₂And peripheral cell, triode T ₂Base stage and timer IC ₁Threshold value end R, trigger end S connect colelctor electrode and timer IC ₂Threshold value end R, charging end Q ' connection, triode T ₂Grounded emitter.

The draw water operating principle of automatic controller of this water tower is as follows: the water level of (one) water tower is at the electrode L of A electrode and B group ₁Below, triode T ₁Base stage no current, emitter stage no-output, timer IC ₁Threshold value end R and trigger end S no signal input, be low level, timer IC ₁Signal output part Q be high level, timer IC ₂Get electric moment, threshold value end R and trigger end S and be low level, then timer IC ₂Signal output part Q be high level, as a same reason, timer IC ₃Signal output part Q also be high level output, by triode T ₃, relay J makes pumping motor W running, begin to draw water.At this moment, if the water source does not have water or because other reasons is not taken out water, pumping motor W dallies, timer IC ₁Threshold value end R and trigger end S still be low level, timer IC ₁Signal output part Q keep high level, timer IC ₂Trigger end S passes through resistance R ₅And capacitor C ₅Charging, potential rise are to being higher than 1/3E _C, but since this moment transistor switching circuit 5 in triode T ₂The base stage no current, be in cut-off state, timer IC ₂Threshold value end R passes through resistance R ₆And capacitor C ₆Charging is through t=1.1R ₆C ₆After time, its potential rise is to being higher than 2/3E _C, timer IC ₂Signal output part Q become low level output, timer IC ₃Dead electricity, output low level, pumping motor W shuts down, thereby prevents from not take out under the situation of water, the long-time idle running of pumping motor W and damaging.(2) after pumping motor W normally drew water, water level raise gradually, had flooded the electrode L of A electrode and B group ₁, A electrode and B group are communicated with triode T by water ₁Base stage electric current I=E is arranged _C/ (R ₀+ R ₁+ R ₂+ R ₃+ R ₄), triode T ₁Unsaturated conducting, emitter stage have signal output, timer IC ₁The level V of threshold value end R and trigger end S ₁Raise, but 1/3E _C≤ V ₁≤ 2/3E _C, timer IC ₁Signal output part Q still keep high level.Since this moment transistor switching circuit 5 in triode T ₂Base stage electric current is arranged and conducting, capacitor C ₆By triode T ₂Collector and emitter discharge, make timer IC ₂The current potential of threshold value end R can't rise, timer IC ₂Signal output part Q keep high level output, timer IC ₃Also export high level, pumping motor W remains in operation.(3) in the water tower level elevation process, the water surface floods the electrode L of B group according to this ₂, L ₃, L ₄, timer IC ₁The current potential V of threshold value end R ₁Still be lower than 2/3E _C, pumping motor W continuous running.But this moment, the access resistance of level detecting device diminished triode T gradually ₁Base current I become big, its output signal and also become greatly, the voltage that is added on the display circuit 4 becomes big, owing to the voltage V at mu balanced circuit two ends _DBe a steady state value, the voltage V of display list then _X=V ₁-V _DChange, thus, the indicating value of display list has realized the water level Presentation Function promptly corresponding to the height of water level of water tower thereupon.(4) in as above (two), (three) described pump process, water level is in electrode L ₁More than, electrode L ₅Below, if because of the system failure such as pressure is not enough, voltage is on the low side etc., make water can't serve water tower, this moment timer IC ₁, timer IC ₂, timer IC ₃Be high level output, timer IC ₃Threshold value end R passes through resistance R ₇And capacitor C ₇Charging (K switch ₇Closed), through certain hour t ₂=1.1R ₇C ₇After time, its potential rise is to being higher than 2/3E _C, timer IC ₃Signal output part Q become low level, pumping motor W is shut down, thereby prevents the long-time non-productive work of pumping motor W, energy conservation.Select resistance R ₇, capacitor C ₇Value, make t ₂Be slightly larger than the cycle t that normally draws water ₁, to guarantee to finish the pump-out of setting.In this circuit, by many groups electric capacity and switch: capacitor C ₇And K switch ₇, capacitor C ₈And K switch ₈, capacitor C ₉And K switch ₉, be combined into multiple selection of time, to satisfy the requirement of different pump-outs.(5) when being increased to, water level floods the electrode L that B organizes ₅, when promptly reaching setting height, timer IC ₁The level V of threshold value end R ₁Equal 2/3E _C, timer IC ₁Signal output part Q become low level, same, timer IC ₂, timer IC ₃Because of dead electricity, output low level, pumping motor W shuts down, and finishes the cycle t that draws water ₁(6) when water tower during because of the water drawdown, the electrode L of A electrode and B group ₅, L ₄, L ₃, L ₂Disconnect according to this, at this moment timer IC ₁The level V of threshold value end R and trigger end S ₁Reduce, but still satisfy 2/3E _C〉=V ₁〉=1/3E _C, timer IC ₁Signal output part Q keep low level, pumping motor W does not turn round.Have only as the electrode L of drawdown to A electrode and B group ₁Disconnect, at this moment V ₁≤ 1/3E _C, timer IC ₁Signal output part Q become high level, pumping motor W entry into service, draw water.Work so repeatedly, realize control function automatically.

Hand switch K ₁, be used under special circumstances by manually starting controller.

Claims (5)

1, the water tower automatic controller that draws water, comprise the level detecting device of forming by a plurality of exploring electrodes of being located in the water tower, control module, drive circuit, and pumping motor, level detecting device is imported triggering signal to control module, control module is by drive circuit control pumping motor duty, it is characterized in that: control module is by first trigger that is provided with water level display circuit and be provided with second of delay control circuit, the 3rd trigger constitutes, the signal input part of first trigger is connected with level detecting device, the power end of second trigger is connected with the signal output part of first trigger, its signal output part is connected with the power end of the 3rd trigger, and the signal output part of the 3rd trigger is connected with drive circuit; The signal input part of second trigger is connected by the signal input part of transistor switching circuit with first trigger.

2, the water tower according to claim 1 automatic controller that draws water, it is characterized in that: described first, second, third trigger is that core constitutes with first, second, third timer respectively, the threshold value end of first timer links to each other with trigger end and forms the signal input part of first trigger, and the threshold value end of second, third timer links to each other with the charging end and forms the signal input part of second, third trigger; The exploring electrode of described level detecting device is two groups, is connected by the signal input part of amplifying circuit with first trigger; Described water level display circuit is serially connected with between the signal input part and its earth terminal of first trigger, comprise mu balanced circuit and display.The delay control circuit of described second, third trigger comprises signal input part and the charging resistor between its power end, the signal input part that is connected in second, third trigger and the charging capacitor between the earth terminal that is connected in second, third trigger, and described transistor switching circuit comprises the triode T that base stage is connected with the signal input part of first trigger, colelctor electrode is connected with the signal input part of second trigger ₂

3, the water tower according to claim 2 automatic controller that draws water, it is characterized in that: described exploring electrode is two groups, is Collapsible structure, wherein is serially connected with the resistance of different resistances between one group of electrode that comprises a plurality of different lengths and the electrode; Described amplifying circuit is by triode T ₁Constitute one group of described exploring electrode and triode T ₁Base stage connect, another group and triode T ₁Colelctor electrode connect triode T ₁Emitter stage and first trigger signal input part be connected.

4, the water tower according to claim 2 automatic controller that draws water, it is characterized in that: mu balanced circuit comprises the diode of serial connection.

5, the water tower according to claim 2 automatic controller that draws water is characterized in that: the charging capacitor of the delay control circuit of described the 3rd trigger is many groups, all is serially connected with selector switch between every group of charging capacitor and the earth terminal.

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