CN219589890U - Leakage detection circuit - Google Patents

Abstract

A leakage detection circuit belongs to the technical field of detection circuits. The utility model comprises a detection module, an indicator light module and an output module, wherein the detection module is respectively and electrically connected with the indicator light module and the output module, the detection module is used for amplifying an electric signal generated by a signal input contact and respectively outputting the electric signal to the indicator light module and the output module in two paths, the output module is used for comparing and judging one path of output signal output by the detection module with a set voltage and outputting a standard voltage signal, and the indicator light module is used for receiving the other path of output signal output by the detection module and indicating whether a conductive medium exists on the signal input contact and whether a circuit normally operates or not through the indicator light. The utility model detects the leakage of water or lubricating oil through the on-off of the signal input contact, amplifies the electric signal generated by the signal input contact through the detection module, and outputs the electric signal to the indicator lamp module and the output module respectively in two paths, and can give an alarm in time when the leakage exists to remind workers to repair or replace.

Description

Leakage detection circuit

Technical Field

The utility model belongs to the technical field of detection circuits, and particularly relates to a leakage detection circuit.

Background

The current water lifting equipment system is in a structure that an internal combustion engine or an electric motor drives a water lifting device through a converter, as shown in fig. 1 and 2, a piston column 4 of the water lifting device moves back and forth to be in contact with a sealing filler 8 and abrades the sealing filler 8, because the running environment of the sealing filler 8 in each system is different, the service life of the sealing filler 8 is different from that measured under normal working conditions, and impurities in water also damage the sealing filler 8, so that the damage time of the sealing filler 8 cannot be controlled. If the packing 8 is damaged, water is sprayed from the gap between the piston rod 4 and the seal 5, and if water is sprayed for a long time, the water enters the oil tank 7 of the converter from the gap of the seal gland 6, and lubricating oil in the oil tank 7 is likely to leak out through the seal gland 6. Therefore, timely detection is required to reduce the hazard of leakage.

Disclosure of Invention

The utility model mainly solves the technical problems existing in the prior art and provides a leakage detection circuit.

The technical problems of the utility model are mainly solved by the following technical proposal: the utility model provides a leak detection circuit, includes detection module, pilot lamp module and output module, detection module is connected with pilot lamp module and output module electricity respectively, detection module is used for the signal input contact produces the signal of telecommunication to enlarge and divide two way output to pilot lamp module and output module respectively, output module is used for judging the output signal of detection module output and setting for voltage comparison to output a standard voltage signal, the pilot lamp module is used for receiving the another way output signal of detection module output, whether has conductive medium on the pilot lamp pilot signal input contact and whether the circuit normal operating.

Preferably, the detection module includes a signal input contact NET1, a signal input contact NET2, a triode Q1, a resistor R2, a resistor R3, and a resistor R4, where the signal input contact NET1 is electrically connected to a collector of the triode Q1 through the resistor R1, the signal input contact NET2 is electrically connected to a base of the triode Q1, an emitter of the triode Q1 is respectively connected to one ends of the indicator module and the resistor R2, another ends of the resistor R2 are respectively connected to one ends of the output module and the resistor R3, another ends of the resistor R3 are connected to one end of the resistor R4, and another ends of the resistor R4 are grounded.

Preferably, the indicator module includes a triode Q2, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R11, an indicator LED1, and an indicator LED2, one end of the resistor R11 is connected to the detection module, the other end of the resistor R11 is connected to the base of the triode Q2, the collector of the triode Q2 is connected to one end of the resistor R7, the emitter of the triode Q2 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the anode of the indicator LED1, the cathode of the indicator LED1 is connected to one end of the resistor R6, the other end of the resistor R7 is connected to the anode of the indicator LED2, the cathode of the indicator LED2 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to the other end of the resistor R6, and the common connection end is grounded.

Preferably, the output module includes a voltage comparator, a variable resistor R9, a resistor R10, a signal output contact NET3, and a signal output contact NET4, where a first pin of the voltage comparator is connected to one end of the resistor R10 and the signal output contact NET3, another end of the resistor R10 is connected to a fixed end of the variable resistor R9 and an eighth pin of the voltage comparator, a second pin of the voltage comparator is connected to a variable end of the variable resistor R9, a third pin of the voltage comparator is connected to the detection module, and a fourth pin of the voltage comparator is connected to another fixed end of the variable resistor R9 and the signal output contact NET4, and a common connection is grounded.

The utility model has the beneficial effects that: the utility model detects the leakage of water or lubricating oil through the on-off of the signal input contact, amplifies the electric signal generated by the signal input contact through the detection module, and outputs the electric signal to the indicator lamp module and the output module respectively in two paths, and can give an alarm in time when the leakage exists to remind workers to repair or replace.

Drawings

FIG. 1 is a schematic diagram of a connection structure of a transducer and a lift pump in a current lift system;

FIG. 2 is a schematic illustration of one connection configuration of a piston post and seal in the current water lifting apparatus system;

FIG. 3 is a circuit diagram of the present utility model;

FIG. 4 is a circuit diagram of a detection module of the present utility model;

FIG. 5 is a circuit diagram of an indicator light module of the present utility model;

FIG. 6 is a circuit diagram of an output module of the present utility model;

fig. 7 is a pin diagram of the voltage comparator LM393 of the present utility model.

In the figure: 1. a detection module; 2. an indicator light module; 3. an output module; 4. a piston column; 5. a seal; 6. a sealing gland; 7. an oil tank; 8. and sealing the filler.

Detailed Description

The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.

Examples: the leakage detection circuit comprises a detection module 1, an indicator light module 2 and an output module 3, wherein the detection module 1 is respectively and electrically connected with the indicator light module 2 and the output module 3, the detection module 1 is used for amplifying an electric signal generated by a signal input contact and outputting the electric signal into two paths of signals, the signals are respectively output to the indicator light module 2 and the output module 3, the output module 3 is used for receiving one path of output signal output by the detection module 1, comparing and judging the output signal with a set voltage of a sensor and outputting a standard voltage signal, and the indicator light module 2 is used for receiving the other path of output signal output by the detection module 1 and indicating whether a conductive medium exists on a signal input contact and whether the circuit operates normally or not through the indicator light.

Specifically, the detection module 1 includes a signal input contact NET1, a signal input contact NET2, a triode Q1, a resistor R2, a resistor R3, and a resistor R4, where the signal input contact NET1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the collector of the triode Q1, the collector of the triode Q2, one end of the resistor R7, a fixed end of the variable resistor R9, the other end of the resistor R10, and an eighth pin of the voltage comparator LM393, and the common connection terminal is connected to +5v voltage, the signal input contact NET2 is electrically connected to the base of the triode Q1, the emitter of the triode Q1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the resistor R4, and the other end of the resistor R4 is grounded. The other end of the resistor R2 is an output end of one path of output signal of the detection module 1 and is electrically connected with a third pin of the voltage comparator LM393 in the output module 3; the emitter of the triode Q1 is the output end of the other path of output signal of the detection module 1 and is electrically connected with one end of a resistor R11 in the indicator lamp module 2.

The utility model provides an indicator lamp module 2 includes triode Q2, resistance R5, resistance R6, resistance R7, resistance R8, resistance R11, pilot lamp LED1 and pilot lamp LED2, triode Q1's projecting pole in the detection module 1 is connected to resistance R11's one end, triode Q2's the other end of resistance R11 connects the other end and the one end of resistance R7 in the detection module 1 respectively, triode Q2's projecting pole connects resistance R5's one end, the positive pole of pilot lamp LED1 is connected to resistance R5's the other end, the one end of resistance R6 is connected to pilot lamp LED 1's negative pole, the positive pole of pilot lamp LED2 is connected to resistance R7's the other end, the one end of resistance R8 is connected to pilot lamp LED 2's negative pole, the other end of resistance R8's the other end of termination resistance R6, and its public connection ground. The indicator light LED1 and the indicator light LED2 are light-emitting diodes, the indicator light LED1 is used for indicating whether a conductive medium exists on a signal input contact or not, an alarm function is achieved, and the indicator light LED2 is used for indicating whether the whole circuit normally operates or not, so that whether the sensor normally operates or not is indicated.

The output module 3 comprises a voltage comparator, a variable resistor R9, a resistor R10, a signal output contact NET3 and a signal output contact NET4, wherein the voltage comparator is LM393 in type and is provided with eight pins in total, a first pin of the voltage comparator is respectively connected with one end of the resistor R10 and the signal output contact NET3, the other end of the resistor R10 is respectively connected with one fixed end of the variable resistor R9, an eighth pin of the voltage comparator and the other end of the resistor R1 in the detection module 1, a second pin of the voltage comparator is connected with the variable end of the variable resistor R9, a third pin of the voltage comparator is connected with the other end of the resistor R2 in the detection module 1, a fourth pin of the voltage comparator is respectively connected with the other fixed end of the variable resistor R9 and the signal output contact NET4, and the common connection end of the voltage comparator is grounded.

When the device is used, the signal input contact NET1 and the signal input contact NET2 are arranged on the sealing gland 6, and the installation mode can be adhesive insulation paste or screw thread installation; the signal output contact NET3 and the signal output contact NET4 are electrically connected with a signal acquisition module or a PLC. When water sprayed from a gap between the plunger 4 and the sealing member 5 splashes onto the signal input contact NET1 and the signal input contact NET2, or lubricating oil leaked from the interior of the converter oil tank 7 contacts the signal input contact NET1 and the signal input contact NET2, the signal input contact NET1 and the signal input contact NET2 are communicated to form a loop, the signal input contact NET1 and the signal input contact NET2 generate micro-current, the micro-signal is amplified into an electric signal with a larger amplitude value by the triode Q1, and the electric signal is divided into two paths of signal outputs, one path of output signal is output to the output module 3, and the other path of output signal is output to the indicator lamp module 2. The resistor R1 is used to control the current of the collector loop, thereby protecting the transistor Q1 and the transistor Q2.

The pilot lamp module 2 makes things convenient for inspection personnel to look over whether the sensor normally operates through pilot lamp LED1 and pilot lamp LED 2's operating condition, and its principle is that use triode Q2 to be sensing element, and the base of triode Q2 is inserted to another way output signal of detection module 1 output, and the projecting pole of triode Q2 inserts the pilot lamp.

The output module 3 is used for receiving one output signal output by the detection module 1, and comparing the output signal with the set voltage of the sensor in a discrimination way so as to judge and output a standard voltage signal. The requirements on the sensitivity of the sensor are different in consideration of different requirements of the use places, so that a variable resistor R9 and a voltage comparator are added; the voltage comparator adopts the LM393, and the function of the voltage comparator is to identify and compare the input signals, so that the influence of condensation, water vapor and the like on the input signals is avoided. The variable resistor R9 is used for adjusting the set voltage of the sensor, so that the effect of adjusting the sensitivity of the sensor is achieved. The resistor R10 is a pull-up resistor for outputting a standard voltage signal.

Finally, it should be noted that the above embodiments are merely representative examples of the present utility model. Obviously, the utility model is not limited to the above-described embodiments, but many variations are possible. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model should be considered to be within the scope of the present utility model.

Claims (4)

1. The utility model provides a leak detection circuit, includes detection module (1), pilot lamp module (2) and output module (3), its characterized in that, detection module (1) are connected with pilot lamp module (2) and output module (3) electricity respectively, detection module (1) are used for the signal input contact to produce the signal amplification and divide two way output to pilot lamp module (2) and output module (3) respectively, output module (3) are used for judging the output signal of detection module (1) output and the comparison of settlement voltage to output a standard voltage signal, pilot lamp module (2) are used for receiving another way output signal of detection module (1) output, whether have conductive medium on the pilot lamp pilot signal input contact and whether the circuit normal operating.

2. The leakage detection circuit according to claim 1, wherein the detection module (1) comprises a signal input contact NET1, a signal input contact NET2, a triode Q1, a resistor R2, a resistor R3 and a resistor R4, the signal input contact NET1 is electrically connected with a collector of the triode Q1 through the resistor R1, the signal input contact NET2 is electrically connected with a base of the triode Q1, an emitter of the triode Q1 is respectively connected with one ends of the indicator module (2) and the resistor R2, the other end of the resistor R2 is respectively connected with one ends of the output module (3) and the resistor R3, the other end of the resistor R3 is connected with one end of the resistor R4, and the other end of the resistor R4 is grounded.

3. The leakage detection circuit according to claim 1, wherein the indicator module (2) comprises a triode Q2, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R11, an indicator LED1, and an indicator LED2, one end of the resistor R11 is connected to the detection module (1), the other end of the resistor R11 is connected to the base of the triode Q2, the collector of the triode Q2 is connected to one end of the resistor R7, the emitter of the triode Q2 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the positive electrode of the indicator LED1, the negative electrode of the indicator LED1 is connected to one end of the resistor R6, the other end of the resistor R7 is connected to the positive electrode of the indicator LED2, the negative electrode of the indicator LED2 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to the other end of the resistor R6, and the common connection is grounded.

4. A leak detection circuit according to claim 1, wherein the output module (3) comprises a voltage comparator, a variable resistor R9, a resistor R10, a signal output contact NET3, and a signal output contact NET4, a first pin of the voltage comparator is connected to one end of the resistor R10 and the signal output contact NET3, another end of the resistor R10 is connected to a fixed end of the variable resistor R9 and an eighth pin of the voltage comparator, a second pin of the voltage comparator is connected to a variable end of the variable resistor R9, a third pin of the voltage comparator is connected to the detection module (1), a fourth pin of the voltage comparator is connected to another fixed end of the variable resistor R9 and the signal output contact NET4, respectively, and a common connection is grounded.