CN2398659Y

CN2398659Y - Double A. C. electrode water-level controller

Info

Publication number: CN2398659Y
Application number: CN 99238400
Authority: CN
Inventors: 陈先鄂
Original assignee: CHEN XIAN'E
Current assignee: CHEN XIAN'E
Priority date: 1999-08-31
Filing date: 1999-08-31
Publication date: 2000-09-27
Anticipated expiration: 2009-08-31

Abstract

The utility model relates to a double A. C. electrode water-level controller, which comprises a power supply transformer and a water tower (pool) control circuit which is composed of a water tower (pool) detection circuit and a time-base circuit. The utility model is characterized in that the second order of the power supply transformer is provided with four windings which respectively provide with the power supply of the detection circuit and the control circuit of the water tower (pool). The control circuit of the water tower and the water pool adopts optical coupling element isolation, and the time-base circuit of the water tower uses a reset circuit to assist work. The utility model overcomes the error generated because of the detection adopting the ground resistance, and realizes the real A. C. detection. The direct current polarization problem can not exist, and the anti-interference capability is strong.

Description

Two-wire ac electrode water level controller

The utility model belongs to the automatic control of liquid device, specifically a kind of two-wire ac electrode water level controller.

Water level controller is more, as application number is the patent of 91227572.3 " single line ac electrode water level autocontrol devices ", improvement forms on the basis of " the ac electrode water level controller " of the patent No. 89213772.X " electronic liquid level controller " and the patent No. 90209391.6 for it, though it has solved the shortcoming that above-mentioned two patents exist, but also there are several defectives this patent in self: 1, use earth resistance to detect a lead in loop as water resistance, because the region soil regime varies, it also is inequality making its earth resistance, so there is certain error in its testing result; 2, exchange detection and still have DC component, because water tower (or pond) is prescribed a time limit in high water stage limit and low-water level, its water resistance is different, the impossible simultaneous adaptation both of these case of value that is used for potentiometer W1, the W2 of balance positive-negative half-cycle electric current so, like this must be asymmetric by the positive-negative half-cycle current potential of water electrode, still exist the direct current polarization problem; 3, in practice, must tank water and water tower water be connected with galvanized iron conduit, water resistance makes electrode and the electrode in the pond in the water tower have an equivalent resistance in iron pipe itself and the pipe like this, two testing circuits that add water tower and pond in this circuit altogether, certainly will the phase mutual interference, be difficult to steady operation.

The purpose of this utility model provides a kind of adaptation with various water quality and soil, is directly just exchanging detection, and pond and water tower do not have the two-wire ac electrode water level controller that disturbs commonly, to overcome above-mentioned defective.

In order to achieve the above object, the utility model comprises power transformer T, water tower (pond) control circuit that the timely basic circuit A1 of water tower (pond) testing circuit (A2) forms constitutes, the inferior utmost point that is characterized in power transformer T has four windings, water tower (pond) testing circuit power supply T2 (T4) and control circuit power supply T1 (T3) are provided respectively, wherein the end of testing circuit power supply T2 (T4) links to each other with water tower (pond) end point e (f), the other end links to each other with an end of resistor R 3 (R4) and the input end of bridge rectifier Q2 (Q4), another input end of resistor R 3 (R4) other end and bridge rectifier Q2 (Q4) and resistor R 1 (R2) are joined, and be connected with water tower (pond) the high site b (d) that surveys, the other end of resistor R 1 (R2) links to each other with water tower (pond) the low points a that surveys (c), the output of bridge rectifier Q2 (Q4) is by resistor R 5 (R6) and resistor R 7 (R8), capacitor C1 (C2) its anodal V1 (V2) of back in parallel inserts the input end 2 of time base circuit A1 (A2), 6, its negative pole be connected through the power supply VCC1 of bridge rectifier Q1 (Q3) (VCC2) negative pole by winding T1 (T3); The control end 4 of time base circuit A1 links to each other with the output terminal of light lotus root element A3, and the output terminal 3 of time base circuit A2 is connected with the negative pole of power supply VCC2 by the input utmost point and the resistor R 9 of light lotus root element A3; Also have a reset circuit to constitute by resistor R 10, R11, capacitor C3 and triode G, wherein the collector of triode G links to each other with the

input end

2,6 of time base circuit A1, the negative pole of emitter and power supply VCC1 joins, the end of base stage termination resistor R10 also is connected with the control end 4 of time base circuit A1 and an end of resistor R 11 by capacitor C3, and the other end of resistor R 11, R10 is connected with the both positive and negative polarity of power supply VCC1 respectively.

The utility model is independent separately to the testing circuit in water tower and pond, does not adopt the lead of earth resistance as water resistance detection loop, can not produce the error that is caused by region soil difference; Adopt independent separately AC power directly to insert the high low level of required detection water tower and pond two ends, can not have the direct current polarization problem, realize that real interchange detects; Adopt power supply separately and light lotus root element that water tower circuit and pond circuit are isolated, wall has exempted to produce the possibility of disturbing.The utility model mature and reliable, cost are very low, can make the usefulness of the confession of family's living water and small enterprise, draining.

Accompanying drawing is the utility model circuit structure schematic diagram.

Below in conjunction with accompanying drawing the utility model is further specified.

One group of the utility model independently AC power T2 by the water resistance in the water tower (when low-water level also by resistor R 1), constitute complete ac circuit by resistor R 3 again, the DC voltage V1 that the dividing potential drop of its alternating current on R3 obtains by the Q2 full-wave rectification differentiates by 2,6 pin that R5 delivers to time base circuit A1 again.

When water tower level is lower than a point V1＜1/3VCC1, the 3 pin output high level of A1, the relay J adhesive start water pump from the pond to water tower water-feeding, when water level is higher than a point but still is lower than the b point, V1 ≈ 1/2VCC1,3 pin of A1 are still exported high level, have only when the firm b of the reaching point of water level, during V1＞2/3VCC1, the 3 pin output of A1 becomes low level, relay J discharges, and water pump stops pumping.When water tower level because water is lower than the b point, V1 ≈ 1/2VCC1,3 pin of A1 still are output as low level, have only when water tower level to be lower than a point once more, during V1＜1/3VCC, 3 pin of A1 are exported high level once more, so circulation has realized automatic water-supply.

Place in insufficient water sources, might occur at work, water level in water pool drops to below the suction line of pump, cause the fault state of the empty water of pump, can be arranged on the C point on the suction line of water pump in advance this moment, in case water level is lower than the C point, 3 pin according to the principle A2 identical with foregoing circuit will be exported high level, make the light-receiving triode conducting of light lotus root element A3, make the 4 pin ground connection of A1, the A1 suction pump that resets is quit work.Have only 3 pin of A2 after water level in water pool returns to the d point of permission gradually just to recover low level; make the light-receiving triode of A3 end; 4 pin of A1 recover noble potential; A1 and water tower circuit recover operate as normal; if this protection process occurs in water pump also in pump process; so after water level in water pool recovers; the 3 pin output of A1 can not automatically restore to the original state that draws water; the way that solves is to set up by R10; R11; the reset circuit that C5 and triode G form becomes low level moment to 2 of A1 at the 3 pin level of A2 by high level; 6 pin provide a low level pulse; make 3 pin of A1 recover high level, water pump continues the original ongoing work of drawing water.

Claims

1, a kind of two-wire ac electrode water level controller, it comprises that water tower and pond control circuit that the timely basic circuit A1 of power transformer T, water tower and pond testing circuit and A2 form constitute, and is characterized in that: power transformer T secondary has four windings:

Water tower testing circuit power supply T2 and control circuit power supply T1 are provided, wherein the end of testing circuit power supply T2 links to each other with some e at the bottom of the water tower, the other end links to each other with an end of resistor R 3 and the input end of bridge rectifier Q2, another input end and the resistor R 1 of the other end of resistor R 3 and bridge rectifier Q2 are joined, and survey high site b with water tower and be connected, the other end of resistor R 1 is surveyed low points a with water tower and is linked to each other, the output of bridge rectifier Q2 is by resistor R 5 and resistor R 7, its anodal V1 inserts the input end 2 of time base circuit A1 after the capacitor C1 parallel connection, 6, its negative pole be connected through the power supply VCC1 of bridge rectifier Q1 negative pole by winding T1;

Pond testing circuit power supply T4 and control circuit power supply T3 are provided, wherein the end of testing circuit power supply T4 links to each other with some f at the bottom of the pond, the other end links to each other with an end of resistor R 4 and the input end of bridge rectifier Q4, another input end and the resistor R 2 of the other end of resistor R 4 and bridge rectifier Q4 are joined, and survey high site d with the pond and be connected, the other end of resistor R 2 is surveyed low points c with the pond and is linked to each other, the output of bridge rectifier Q4 is by resistor R 6 and resistor R 8, its anodal V2 inserts the input end 2 of time base circuit A2 after the capacitor C2 parallel connection, 6, its negative pole be connected through the power supply VCC2 of bridge rectifier Q3 negative pole by winding T3.

2, according to the described two-wire ac electrode of claim 1 water level controller, it is characterized in that: the control end 4 of time base circuit A1 links to each other with the output terminal of light lotus root element A3, and the output terminal 3 of time base circuit A2 is connected with the negative pole of power supply VCC2 by the input utmost point and the resistor R 9 of light lotus root element A3.

3, according to claim 1 or 2 described two-wire ac electrode water level controllers, it is characterized in that: also have a reset circuit to constitute by resistor R 10, R11, capacitor C3 and triode G, wherein the collector of triode G links to each other with the input end 2,6 of time base circuit A1, the negative pole of emitter and power supply VCC1 joins, the end of base stage termination resistor R10 also is connected with the control end 4 of time base circuit A1 and an end of resistor R 11 by capacitor C3, and the other end of resistor R 11 and resistor R 10 is connected with the both positive and negative polarity of power supply VCC1 respectively.