CN207459699U - Mine power resource connecting detection device - Google Patents

Abstract

The utility model discloses a kind of mine power resource connecting detection devices, including AC power P1, AC transformer T1, rectifier bridge D1, relay S1, current/voltage type mutual inductor H1, operational amplifier U1 and comparator U2, the output terminal of the AC power P1 is electrically connected with the input terminal of relay S, the output terminal of the input terminating resistor R1 and relay S of relay S simultaneously connects, the output termination load resistance of relay S；The output terminal of the input termination AC transformer T1 and AC power P1 of the AC power P1 simultaneously connects.When this mine power resource connecting detection device detects that size of current is normal, triode Q2 is closed, the base stage of triode Q1; become low level, therefore triode Q1 is also turned off, the coil blackout of relay S; relay S outputs disconnect, and power supply output is cut off, and realizes the function of open-circuit-protection；Overall structure principle is simple and practical, of low cost, practicality easy to spread.

Description

Mine power resource connecting detection device

Technical field

The utility model is related to colliery power supply unit technical fields, are specially a kind of mine power resource connecting detection device.

Background technology

It is easy to set off an explosion in the combustible and explosive areas such as colliery, open fire, electric spark etc., gives the country and people's lives and properties Safety causes irremediable loss, in view of the necessity of safety in production, there is strict demand in China to colliery downhole equipment, prevents The generation of electric spark, to ensure that downhole safety production provides guarantee.If but have underground cable fracture, cause open wires, Personnel will be once life danger will be present with by touching, if the electric wire of fracture is connected to form short circuit etc. with the earth, it will generate electric spark Jeopardize colliery and the security of the lives and property of personnel, therefore need a kind of mine power resource connecting detection device.

Utility model content

The purpose of this utility model is to provide a kind of mine power resource connecting detection devices, have and power line open circuit can be achieved In the state of, it is fully powered-off；It can heavy-current discharge phenomenon short-circuit to avoid power line, and generating；Structural principle is simple and practical, It is of low cost, it is easy to spread practical the advantages of, solve circuit aging short circuit in manganese ore exploitation in the prior art and generate electric spark The problem of so as to cause coal mining accident.

To achieve the above object, the utility model provides following technical solution：A kind of mine power resource connecting detection device, bag Include AC power P1, AC transformer T1, rectifier bridge D1, relay S1, current/voltage type mutual inductor H1, operational amplifier U1 and Comparator U2, the output terminal of the AC power P1 are electrically connected with the input terminal of relay S, the input terminating resistor of relay S The output terminal of R1 and relay S simultaneously connects, the output termination load resistance of relay S；The input termination of the AC power P1 is handed over The output terminal of convertor transformer T1 and AC power P1 simultaneously connects, and the input terminal of AC power P1 is electrically connected with the input terminal of relay S, The input terminal and connecting resistance R2 of AC power P1 is electrically connected with the output terminal of relay S；The input terminal of the AC transformer T1 The pin 2 of rectifier bridge D1, the pin 4 of the output termination rectifier bridge D1 of AC transformer T1 are connect, the pin 1 of rectifier bridge D1 is grounded, The pin 3 of rectifier bridge D1 connects 12V power supplys；The output terminal series resistor R3 of the operational amplifier U1 is electrically connected with triode Q2 base stages It connects, the collector of triode Q2 connects 12V power supplys, and triode Q2 ends emitter serial capacitance C1 ground connection, the input terminal of capacitance C1 is simultaneously Connecting resistance R11 is grounded, and triode Q2 ends emitter series resistor R4 is electrically connected with the base stage of triode Q1, the transmitting of triode Q1 Pole is grounded, the input terminal of the collector connecting relay S of triode Q1；The collection of the output terminal electrical connection triode Q3 of the resistance R4 Electrode, the emitter ground connection of triode Q3, the base stage series resistor R5 of triode Q3 are electrically connected with the output terminal of comparator U2, than Cathode series resistor R8 ground connection compared with device U2, the input terminal and connecting resistance R9 of resistance R8 connect 12V power ends, the anode of comparator U2 It is electrically connected with the anode of operational amplifier U1, the output termination current/voltage type mutual inductor H1 and operation amplifier of operational amplifier U1 The cathode connection of device U1, anode and connecting resistance the R10 ground connection of operational amplifier U1.

Preferably, the triode Q1, triode Q2 and triode Q3 are 2N3904 using model.

Preferably, the no-load voltage ratio of the AC transformer T1 is 22:14.

Preferably, the model LM393 of the model AD620 of the operational amplifier U1, comparator U2.

Compared with prior art, the beneficial effects of the utility model are as follows：

At work, current/voltage type mutual inductor H1 measurements exchange the electric current of outlet side to this mine power resource connecting detection device Size, when size of current is normal, triode Q2 is closed, and the base stage of triode Q1 becomes low level, therefore triode Q1 is also closed It closes, the coil blackout of relay S, relay S outputs disconnect, and power supply output is cut off, and realizes the function of open-circuit-protection, simultaneously The state that resistance R1 and resistance R2 is always maintained at lightly conducting can monitor the situation of load end always, when the normal connection of load, Operational amplifier U1, triode Q2 can export high level, and relay S relays are attracted, power up output, after realizing power-off The function of recovery；When normal power supply is loaded, when such as running into short circuit or load overload, it is assumed that the electric current of load is more than 10A, then current/voltage type mutual inductor H1 outputs are more than 10V, and the negative reference voltage of comparator U2 is 12V* (R8/ (R8+R9))； It substitutes into numerical value and obtains 12V* (10K Ω/(10K Ω+2K Ω))=10V, therefore when load current is more than 10A, comparator U2 outputs For high level, triode Q3 is opened, and the base stage pressure of triode Q1 pulls into low level, and triode Q1 is closed, relay S lines Circle forces power-off, and relay S disconnects output, it is achieved thereby that load end is because of overload or the defencive function of short circuit；It can be achieved dynamic It is fully powered-off in the state of line of force open circuit；It can heavy-current discharge phenomenon short-circuit to avoid power line, and generating；Structural principle It is simple and practical, of low cost, practicality easy to spread.

Description of the drawings

Fig. 1 is the circuit diagram of the utility model.

Specific embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained shall fall within the protection scope of the present invention.

Referring to Fig. 1, a kind of mine power resource connecting detection device, including AC power P1, AC transformer T1, rectifier bridge D1, relay S1, current/voltage type mutual inductor H1, operational amplifier U1 and comparator U2, triode Q1, triode Q2 and three poles Pipe Q3 is 2N3904 using model；The output terminal of AC power P1 is electrically connected with the input terminal of relay S, and relay S's is defeated Enter the output terminal of terminating resistor R1 and relay S and connect, the output termination load resistance of relay S；The input of AC power P1 It terminates the output terminal of AC transformer T1 and AC power P1 and connects, the input terminal of AC power P1 and the input terminal of relay S Electrical connection, the input terminal and connecting resistance R2 of AC power P1 are electrically connected with the output terminal of relay S；The input of AC transformer T1 The pin 2 of rectifier bridge D1, the pin 4 of the output termination rectifier bridge D1 of AC transformer T1 are terminated, the pin 1 of rectifier bridge D1 connects Ground, the pin 3 of rectifier bridge D1 connect 12V power supplys；The output terminal series resistor R3 of operational amplifier U1 is electrically connected with triode Q2 base stages It connects, the collector of triode Q2 connects 12V power supplys, and triode Q2 ends emitter serial capacitance C1 ground connection, the input terminal of capacitance C1 is simultaneously Connecting resistance R11 is grounded, and triode Q2 ends emitter series resistor R4 is electrically connected with the base stage of triode Q1, the transmitting of triode Q1 Pole is grounded, the input terminal of the collector connecting relay S of triode Q1；The current collection of the output terminal electrical connection triode Q3 of resistance R4 Pole, the emitter ground connection of triode Q3, the base stage series resistor R5 of triode Q3 are electrically connected with the output terminal of comparator U2, compare The cathode series resistor R8 ground connection of device U2, the input terminal of resistance R8 and connecting resistance R9 connect 12V power ends, the anode of comparator U2 with The anode electrical connection of operational amplifier U1, the output termination current/voltage type mutual inductor H1 and operational amplifier of operational amplifier U1 The cathode connection of U1, anode and connecting resistance the R10 ground connection of operational amplifier U1；The P1 of the mine power resource connecting detection device is 220V AC powers, the no-load voltage ratio of AC transformer T1 is 220 to 14, and the no-load voltage ratio of current/voltage type mutual inductor H1 is 1 to 1, computing The model LM393 of the model AD620 of amplifier U1, comparator U2；Current/voltage type mutual inductor H1 measurement exchange outlet sides Size of current, the gain formula of operational amplifier U1 is G=49.4K Ω/RG+1；G=49.4K Ω/R10 can be obtained by bringing formula into It+1=138.2 times,, can because the no-load voltage ratio of current/voltage type mutual inductor H1 is 1 to 1 when the output current of load end is less than 5mA It is 5mV to obtain current/voltage type mutual inductor H1 outputs, and knows the gain size G of operational amplifier U1 for 138.2 times, therefore operation amplifier The output of device U1 is 5mV*150.7=0.691V, and triode Q2 is closed, and the base stage of triode Q1 becomes low level, therefore triode Q1 is also turned off, the coil blackout of relay S, and relay S outputs disconnect, and power supply output is cut off, and realizes open-circuit-protection Function, while resistance R1 and resistance R2 are always maintained at the state of lightly conducting can monitor the situation of load end always, when load just Often during connection, operational amplifier U1, triode Q2 can export high level, and relay S relays are attracted, and power up output is real The function of recovery after power cut is showed；When normal power supply is loaded, when such as running into short circuit or load overload, it is assumed that load Electric current is more than 10A, then current/voltage type mutual inductor H1 outputs are more than 10V, and the negative reference voltage of comparator U2 is 12V* (R8/ (R8+R9))；It substitutes into numerical value and obtains 12V* (10K Ω/(10K Ω+2K Ω))=10V, therefore when load current is more than 10A, compare Device U2 outputs are high level, and triode Q3 is opened, and the base stage pressure of triode Q1 pulls into low level, and triode Q1 is closed, Relay S coils force power-off, and relay S disconnects output, it is achieved thereby that load end is because of overload or the defencive function of short circuit.

In summary：At work, current/voltage type mutual inductor H1 measurement exchanges are defeated for this mine power resource connecting detection device Go out the size of current of side, when size of current is normal, triode Q2 is closed, and the base stage of triode Q1 becomes low level, therefore three poles Pipe Q1 is also turned off, the coil blackout of relay S, and relay S outputs disconnect, and power supply output is cut off, and realizes open-circuit-protection Function, while resistance R1 and resistance R2 are always maintained at the state of lightly conducting can monitor the situation of load end always, work as load During normal connection, operational amplifier U1, triode Q2 can export high level, and relay S relays are attracted, power up output, Realize the function of recovery after power cut；When normal power supply is loaded, when such as running into short circuit or load overload, it is assumed that load Electric current be more than 10A, then current/voltage type mutual inductor H1 outputs are more than 10V, and the negative reference voltage of comparator U2 is 12V* (R8/(R8+R9))；It substitutes into numerical value and obtains 12V* (10K Ω/(10K Ω+2K Ω))=10V, therefore when load current is more than 10A, Comparator U2 outputs are high level, and triode Q3 is opened, and the base stage pressure of triode Q1 pulls into low level, and triode Q1 is closed It closes, relay S coils force power-off, and relay S disconnects output, it is achieved thereby that load end is because of overload or the protection work(of short circuit Energy；It is fully powered-off in the state of whole achievable power line open circuit；Can be to avoid power line short circuit, and the high current generated is put Electrical phenomena；Structural principle is simple and practical, of low cost, practicality easy to spread.

While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art, It is appreciated that in the case where not departing from the principle of the utility model and spirit can these embodiments be carried out with a variety of variations, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims (4)

1. a kind of mine power resource connecting detection device, including AC power P1, AC transformer T1, rectifier bridge D1, relay S1, Current/voltage type mutual inductor H1, operational amplifier U1 and comparator U2, it is characterised in that：The output terminal of the AC power P1 with The input terminal electrical connection of relay S, the output terminal of the input terminating resistor R1 and relay S of relay S simultaneously connect, relay S's Output termination load resistance；The output terminal of the input termination AC transformer T1 and AC power P1 of the AC power P1 is simultaneously Connect, the input terminal of AC power P1 is electrically connected with the input terminal of relay S, the input terminal of AC power P1 and connecting resistance R2 with after The output terminal electrical connection of electric appliance S；The pin 2 of the input termination rectifier bridge D1 of the AC transformer T1, AC transformer T1's The pin 4 of output termination rectifier bridge D1, the pin 1 of rectifier bridge D1 are grounded, and the pin 3 of rectifier bridge D1 connects 12V power supplys；The computing The output terminal series resistor R3 of amplifier U1 is electrically connected with triode Q2 base stages, and the collector of triode Q2 connects 12V power supplys, three poles Pipe Q2 ends emitter serial capacitance C1 is grounded, input terminal and connecting resistance the R11 ground connection of capacitance C1, triode Q2 ends emitter concatenation Resistance R4 is electrically connected with the base stage of triode Q1, the emitter ground connection of triode Q1, the collector connecting relay S's of triode Q1 Input terminal；The collector of the output terminal electrical connection triode Q3 of the resistance R4, the emitter ground connection of triode Q3, triode Q3 Base stage series resistor R5 be electrically connected with the output terminal of comparator U2, the cathode series resistor R8 of comparator U2 ground connection, resistance R8 Input terminal and connecting resistance R9 connect 12V power ends, the anode of comparator U2 is electrically connected with the anode of operational amplifier U1, and computing is put The output termination current/voltage type mutual inductor H1 of big device U1 is connected with the cathode of operational amplifier U1, the anode of operational amplifier U1 And connecting resistance R10 is grounded.

2. a kind of mine power resource connecting detection device according to claim 1, it is characterised in that：The triode Q1, three Pole pipe Q2 and triode Q3 is 2N3904 using model.

3. a kind of mine power resource connecting detection device according to claim 1, it is characterised in that：The AC transformer T1 No-load voltage ratio be 22:14.

4. a kind of mine power resource connecting detection device according to claim 1, it is characterised in that：The operational amplifier U1 Model AD620, the model LM393 of comparator U2.