Power supply control device for water taking station in mining area

Abstract

A mining area water taking station power supply control device belongs to the technical field of power supply equipment and comprises an internal combustion engine generator, a switching circuit, a detection circuit, a control circuit and an alarm circuit. The power grid, the mining area power station and a power source output by the generator are electrically connected with the three control power source input ends of the switching circuit respectively, the power source output end of the switching circuit is electrically connected with the power source input end of the water pump, and the power source output end of the control circuit is electrically connected with the power source input end of a starting motor of the generator. The power grid power supply preferably supplies power to the water pump at ordinary times, the mining area power station can automatically supply power to the water pump after the power grid is powered off, and the standby generator can be automatically started to supply power to the water pump and the like when the power grid and the mining area power station fail to supply power to the water pump and the like normally, so that the water pump can work normally, and accumulated water in the mining area can be discharged stably; and when the water pump fails to pump water during working, a worker can be prompted to overhaul in time, so that the safe drainage work of the mining area is effectively ensured to be smoothly carried out.

Description

Technical Field

[0001] This utility model relates to the field of power supply equipment technology, and in particular to a water supply control device for a mining area water intake station. Background Technology

[0002] In mining operations, water pumps are crucial equipment, primarily used for supplying water to relevant facilities and pumping water out of the mine pit. To ensure a safe and reliable power supply, existing mine water pumps (also known as water intake stations) generally employ a dual-circuit power supply. Specifically, the two power supplies are from the mine's power station and the power grid. The pumps operate using the grid power, and in the event of a power outage, staff switch the power switch to supply power to the pumps via the power station. Once the grid power is restored, staff manually switch the power switch back to the grid power supply. This manual operation method is inconvenient for staff and increases management costs.

[0003] Furthermore, while the power supply from the mine's power plant and the grid provides a certain level of power to the water pumps, in extreme cases, when the grid fails and the power plant stops outputting power for various reasons (such as power plant malfunction, or the power lines connecting the power plant and the water pumps being disconnected due to severe weather or geological disasters), a stable and reliable power supply to the water pumps cannot be guaranteed, posing certain safety hazards (for example, if accumulated water in the mine is not drained in time, it could enter the mine shaft and cause a serious accident). Finally, the existing mine water pumps lack fault indication functions. This means that when they malfunction and stop pumping water, staff cannot be informed of the situation in a timely manner to take appropriate action, hindering the smooth progress of drainage work. In conclusion, it is essential to provide a device that can effectively guarantee the power supply to water pumps and promptly alert staff to perform maintenance when the pumps malfunction. Utility Model Content

[0004] In order to overcome the shortcomings of existing power supply methods for mine water pumps, which are limited by technology and have the drawbacks described in the background, this utility model provides a water supply control device for mine water intake stations that not only supplies power to water pumps through the power grid and mine power station, but also automatically starts a backup generator to supply power to water pumps when either fails to supply power normally. Furthermore, it can promptly alert staff to carry out maintenance when a water pump fails to pump water, thus effectively ensuring the safe drainage of the mine area.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A water supply control device for a mining area water intake station includes an internal combustion engine generator, and further comprises a switching circuit, a detection circuit, a control circuit, and an alarm circuit. The switching circuit, detection circuit, control circuit, and alarm circuit are installed in an electrical control box. The power grid, the mining area power station, the generator output power, and the three control power input terminals of the switching circuit are electrically connected respectively. The power output terminal of the switching circuit is electrically connected to the power input terminal of the water pump. The signal output terminal of the control circuit is electrically connected to the signal input terminal of the switching circuit. The power input terminal of the detection circuit is electrically connected to the power output terminal of the switching circuit. The power output terminal of the detection circuit is electrically connected to the power input terminals of the control circuit and the alarm circuit. The power output terminal of the control circuit is electrically connected to the power input terminal of the generator's starter motor.

[0007] Furthermore, the switching circuit includes two electrically connected relays. The two power input terminals of the first relay and two normally open contacts of the first relay are respectively connected. The four control power input terminals of the first relay and the four normally closed contacts of the second relay are respectively connected. The relays can also be replaced by AC electromagnetic contactors.

[0008] Furthermore, the detection circuit includes a power conversion module, a resistor, and an optocoupler that are electrically connected. The positive power output terminal of the power conversion module is connected to one end of the first resistor and one end of the second resistor. The other end of the first resistor is connected to one end of the third resistor and the positive terminal of the light-emitting diode (LED) embedded in the optocoupler. The other end of the second resistor is connected to the collector of the phototransistor embedded in the optocoupler. The emitter of the phototransistor embedded in the optocoupler is connected to one end of the fourth resistor. The other end of the fourth resistor is connected to one end of the fifth resistor. The other end of the fifth resistor is connected to the other end of the third resistor, the negative terminal of the LED embedded in the optocoupler, and the emitter of the phototransistor.

[0009] Furthermore, the control circuit includes an electrically connected transistor, diode, relay, battery, power switch, time switch, resistor, and capacitor. The positive power input terminal of the first relay is connected to the positive terminal of the diode. The negative terminal of the diode is connected to one end of the power switch and the positive terminal of the battery. The control power input terminals of the first and second relays are connected to the anode of the thyristor. The normally closed contact of the first relay is connected to one end of the resistor. The other end of the resistor is connected to the control electrode of the thyristor and the positive terminal of the capacitor. The cathode of the thyristor is connected to the positive power input terminal of the second relay. The normally open contact of the second relay is connected to the positive power input terminal of the time switch. The collector of the transistor is connected to the negative power input terminal of the first relay. The emitter of the transistor is connected to the negative power input terminal of the second relay, the negative power input terminal of the time switch, and the negative terminal of the capacitor.

[0010] Furthermore, the alarm circuit includes an electrically connected resistor, a transistor, a relay, an alarm, and a pressure sensor. The air inlet of the pressure sensor is installed on the opening of the water pump outlet pipe. The positive power input terminal of the pressure sensor is connected to the positive power input terminal of the relay and the control power input terminal. The signal output terminal of the pressure sensor is connected to one end of the resistor, and the other end of the resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay. The normally closed contact of the relay is connected to the positive power input terminal of the alarm. The negative power input terminal of the alarm is connected to the emitter of the transistor and the negative power input terminal of the pressure sensor.

[0011] Compared with the prior art, the advantages of this utility model are: (1) In normal times, the power grid is preferred to power the water pump. After the power grid fails, the mine power station can automatically power the water pump. When both fail to power the water pump normally, the backup generator can automatically start to power the water pump, ensuring that the water pump can work normally and the water in the mine can be discharged stably; (2) Under the action of the alarm circuit, when the water pump fails to pump water, it can promptly remind the staff to carry out maintenance, effectively ensuring the smooth progress of the mine's safe drainage work. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is the circuit diagram of this utility model. Detailed Implementation

[0015] Figure 1 , 2 As shown, a water supply control device for a mining area water intake station includes a small internal combustion engine generator FD, and also has a switching circuit 1, a detection circuit 2, a control circuit 3, and an alarm circuit 4; the switching circuit 1, the detection circuit 2, the control circuit 3, and the alarm circuit 4 are installed on a circuit board inside the electrical control box 5.

[0016] Figure 1 , 2As shown, the switching circuit includes two electrically connected relays J and J3. The two power input terminals of the first relay J and two normally open contacts of the first relay J are respectively connected. The four control power input terminals of the first relay J and the four normally closed contacts of the second relay J3 are respectively connected. The relays can also be replaced by AC electromagnetic contactors. The detection circuit includes a power conversion module W1 connected via circuit board wiring, resistors R1, R2, R3, R4, and R5, and an optocoupler W2. The positive power output terminal 3 of the power conversion module W1 is connected to one end of the first resistor R1 and one end of the second resistor R3. The other end of the first resistor R1 is connected to one end of the third resistor R2 and the positive terminal of the LED built into the optocoupler W2. The other end of the second resistor R3 is connected to the collector of the phototransistor built into the optocoupler W2. The emitter of the phototransistor built into the optocoupler W2 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to one end of the fifth resistor R5. The other end of the fifth resistor R5 is connected to the other end of the third resistor R2 and the negative terminal of the LED built into the optocoupler W2. The control circuit includes transistor T1, diode VD, relays J1 and J2, battery G1, power switch S (handle located outside the opening at the front of the control box), time switch W3, resistor R6, and capacitor C1, all connected via circuit board wiring. The positive power input terminal of the first relay J1 is connected to the positive terminal of diode VD, and the negative terminal of diode VD is connected to one end of power switch S and the positive terminal of battery G1. The first relay J1 controls the power input terminal, the second relay J2 controls the power input terminal, and the anode of the thyristor VS is connected. The normally closed contact of J1 is connected to one end of resistor R6. The other end of resistor R6 is connected to the control electrode of the thyristor VS and the positive terminal of capacitor C1. The cathode of the thyristor VS is connected to the positive power input terminal of the second relay J2. The normally open contact of the second relay J2 is connected to pin 1 of the positive power input terminal of the time switch W3. The collector of transistor T1 is connected to the negative power input terminal of the first relay J1. The emitter of transistor T1 is connected to the negative power input terminal of the second relay J2, pin 2 of the negative power input terminal of the time switch W3, and the negative terminal of capacitor C1. The alarm circuit includes a resistor R7, a transistor T2, a relay J4, an alarm B, and a pressure sensor W4, all connected via circuit board wiring. The air inlet of the pressure sensor W4 is sealed and installed on the opening of the water outlet pipe of the water pump M, and is connected to the inside of the water outlet pipe. The positive power input pin 1 of the pressure sensor W4 is connected to the positive power input pin and the control power input pin of the relay J4. The signal output pin 3 of the pressure sensor W4 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the base of the transistor T2. The collector of the transistor T2 is connected to the negative power input pin of the relay J4. The normally closed contact of the relay J4 is connected to the positive power input pin of the alarm B. The negative power input pin of the alarm B is connected to the emitter of the transistor T2 and the negative power input pin 2 of the pressure sensor W4.

[0017] Figure 1 , 2 As shown, the three-phase four-wire power supply K1 (power supply from the power department), the three-phase four-wire power supply terminal of the mining power station K2, and the four normally open and four normally closed contacts of relay J in the switching circuit are connected by wires. The four control power input terminals of relay J and the four normally closed contacts of relay J3 are connected by wires. The four normally open contacts of relay J3 and the four power output terminals of generator FD are connected by wires. The four control power input terminals of relay J3 and the power input terminals of water pump M are connected by wires. Two of the control power input terminals of relay J (one phase line and one neutral line) are connected to the power input terminals 1 and 2 of power module W1 by wires. One end of resistor R5 is connected to the base of transistor T1. The positive power output terminal 3 of power module W1 (pin 4 is connected to the negative terminal of capacitor C1) is connected to one end of power switch S via diode VD in series. The normally open contact and negative power input terminal of relay J2 are connected to the two power input terminals of relay J3 by wires. The two terminals of battery G1, the positive power input terminal of relay J4, and the emitter of transistor T2 are connected by wires. Pins 3 and 4 of time switch W3 and the power input terminals of generator starter motor Q are connected by wires. In this invention, the water pump M is not limited to using a 380V three-phase four-wire power supply; it can also use a 380V three-phase power supply or a 220V single-phase AC power supply. Relay J is a DC 220V AC relay; relays J1, J2, J3, and J4 are DC 12V relays; the SCR VS is a molded unidirectional SCR, model MCR100-1; the battery G1 is a 12V / 10Ah lithium battery; the power conversion module W1 is a finished AC 220V to DC 12V power module; the resistance values ​​of resistors R1, R2, R3, R4, R5, R6, and R7 are 12KΩ, 3KΩ, 100Ω, 10KΩ, 3KΩ, 10KΩ, 10KΩ, and 47KΩ respectively; transistors T1 and T2 are model 9013 (NPN); capacitor C1 is model 10... μF / 25V; Optocoupler W2 is model PC817; Time switch W3 is model KG316T, which has two power input terminals, two power output terminals, and seven setting buttons. Adjusting the seven setting buttons can set the output time of the two power output terminals; Diode VD is model 1N4007; Pressure sensor W4 is model BP8G-AxA, which has two power input terminals and one power output terminal. The higher the detected voltage, the higher the output voltage signal, and vice versa; Alarm B is model XF12V active continuous audible alarm.

[0018] Figure 1 , 2As shown, when the power grid K1 is not interrupted, one phase wire and the neutral wire of the power grid enter the power input terminal of relay J. Relay J is energized and its control power input terminal and normally open contact terminal close. In this way, the power grid power supplies the water pump M (submersible pump) through the control power input terminal and normally open contact terminal of relay J, and then through the control power input terminal and normally closed contact terminal of relay J3 (which is currently de-energized). When the power grid K1 is de-energized, one phase wire and the neutral wire of the power grid no longer enter the power input terminal of relay J. Relay J is de-energized and its control power input terminal and normally closed contact terminal no longer close. In this way, the power output K2 from the mine power station supplies the water pump (submersible pump) through the control power input terminal and normally closed contact terminal of relay J, and then through the control power input terminal and normally closed contact terminal of relay J3 (which is currently de-energized). In this new type of system, whether the power grid or the power station is supplying power to the water pump, when the relay J controls the power input terminal to be energized, the power module W1 will also be energized and operate. Its pins 3 and 4 output a stable 12V DC power supply, which is unidirectionally conducted through diode VD to charge the battery G1 (after a subsequent power outage, the thyristor and time control switch will also continue to be energized and operate), and to supply power to the control circuit and alarm circuit (provided that the power switch S is open). When the power grid or power station is not interrupted, the 12V power supply is divided by resistors R1 and R2 to supply power to the optocoupler W2. The LED inside the optocoupler W2 is energized and emits light. The phototransistor inside the optocoupler W2 conducts, and its emitter outputs a high level (voltage reduction and current limiting by resistor R3). This high level is divided by resistors R4 and R5 and enters the base of transistor T1. Transistor T1 conducts, and its collector outputs a low level, which enters the negative power input terminal of relay J1. Relay J1 is energized and its control power input terminal and normally closed contact terminal are open. In this way, the thyristor VS will not be triggered and conduct. If relay J2 is not energized and engages, then relay J3 and time switch W3 will also not be energized, and the power output from the power grid or power station will continue to supply power to water pump M.

[0019] Figure 1 , 2As shown, when the power grid or power plant experiences a power outage, no power is supplied to optocoupler W2 (diode VD has unidirectional conduction, and battery power will not enter the optocoupler). The LED inside optocoupler W2 loses power, and the phototransistor inside W2 cuts off, its emitter no longer outputs a high level to the base of transistor T1. Transistor T1 cuts off, its collector no longer outputs a low level to the negative power input terminal of relay J1. Relay J1 loses power and no longer engages, closing its control power input terminal and normally closed contact. Thus, the 12V power supply will enter the control terminal of the thyristor VS through the control power input terminal and normally closed contact of relay J1. Specifically, the resistor... R6 acts as a voltage reducer and current limiter. Capacitor C1 charges with a 3-second delay (this 3-second delay is because when the power grid or power station switches power, there is a certain time difference between the energization or de-energization of relay J and the connection of its normally open and normally closed contacts; therefore, the delay effectively prevents the thyristor VS from being mistakenly triggered and the generator FD from starting during the energization or de-energization of relay J). Only then will the voltage entering the control electrode of thyristor VS exceed 0.7V, thus triggering thyristor VS to conduct, energizing relay J2 and closing its control power input and normally open contacts, energizing the time switch W3 and relay J3. After relay J3 is energized and closed, its control power input and normally open contacts close, and its control power input and normally closed contacts open. In this way, the power output from generator FD enters the power input of water pump M, and generator FD supplies power to water pump M. After the timer switch W3 is energized, its pins 3 and 4 will output power for 10 seconds (the time is adjustable) to the power input terminal of the generator's starter motor Q. This energizes starter motor Q, which in turn starts the internal combustion engine of generator FD. The internal combustion engine drives the generator (3KW) to supply power to water pump M, ensuring that water pump M (2KW) can continue to operate even after a power outage in the grid or power station, allowing for the stable drainage of accumulated water in the mining area. After the power grid or power station restores power, the operator can turn off the power switch S (and shut off the generator's internal combustion engine fuel circuit, restoring power to the water pump). In this way, the thyristor VS will no longer conduct, preparing for the next power outage in the grid or power station and the automatic restart of the generator to supply power to the water pump. In this new type of device, when the water pump M is working normally and its outlet is pumping water normally, the voltage signal output by pin 3 of the pressure sensor W4 is relatively high. This voltage signal is reduced and current limited by resistor R7 and enters the base of transistor T2, which is higher than 0.7V. Transistor T2 conducts and the collector outputs a low level, which enters the negative power input terminal of relay J4. Relay J4 is energized and its control power input terminal and normally closed contact terminal are opened. In this way, the alarm B will not be energized and will sound, indicating that the water pump M is in normal working condition.When water pump M malfunctions and its outlet fails to pump water properly, the voltage signal output from pin 3 of pressure sensor W3 becomes relatively low. This voltage signal is reduced and current-limited by resistor R7, and enters the base of transistor T2, where it drops below 0.7V. Transistor T2 is then cut off, and its collector no longer outputs a low level to the negative power input terminal of relay J4. Relay J4 is de-energized and no longer engages, closing its control power input terminal and normally closed contact. As a result, alarm B is energized and sounds, indicating that water pump M is in an abnormal operating state. Upon hearing the alarm, staff can promptly perform maintenance, effectively ensuring the smooth operation of safe drainage in the mining area.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0021] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power supply control device for a water intake station in a mining area, comprising an internal combustion engine generator, characterized in that, It also includes a switching circuit, a detection circuit, a control circuit, and an alarm circuit. The switching circuit, detection circuit, control circuit, and alarm circuit are installed in the electrical control box. The power output from the power grid, the mining power station, and the generator is electrically connected to the three control power input terminals of the switching circuit. The power output terminal of the switching circuit is electrically connected to the power input terminal of the water pump. The signal output terminal of the control circuit is electrically connected to the signal input terminal of the switching circuit. The power input terminal of the detection circuit is electrically connected to the power output terminal of the switching circuit. The power output terminal of the detection circuit is electrically connected to the power input terminals of the control circuit and the alarm circuit. The power output terminal of the control circuit is electrically connected to the power input terminal of the generator's starter motor.

2. The power supply control device for a mining area water intake station according to claim 1, characterized in that, The switching circuit includes two electrically connected relays. The two power input terminals of the first relay and two normally open contacts of the first relay are connected respectively. The four control power input terminals of the first relay and the four normally closed contacts of the second relay are connected respectively. The relays can also be replaced by AC electromagnetic contactors.

3. The power supply control device for a mining area water intake station according to claim 1, characterized in that, The detection circuit includes a power conversion module, resistors, and an optocoupler that are electrically connected. The positive power output terminal of the power conversion module is connected to one end of the first resistor and one end of the second resistor. The other end of the first resistor is connected to one end of the third resistor and the positive terminal of the LED built into the optocoupler. The other end of the second resistor is connected to the collector of the phototransistor built into the optocoupler. The emitter of the phototransistor built into the optocoupler is connected to one end of the fourth resistor. The other end of the fourth resistor is connected to one end of the fifth resistor. The other end of the fifth resistor is connected to the other end of the third resistor, the negative terminal of the LED built into the optocoupler, and the emitter of the phototransistor.

4. The power supply control device for a mining area water intake station according to claim 1, characterized in that, The control circuit includes an electrically connected transistor, diode, relay, battery, power switch, time switch, resistor, and capacitor. The positive power input terminal of the first relay is connected to the positive terminal of the diode. The negative terminal of the diode is connected to one end of the power switch and the positive terminal of the battery. The control power input terminals of the first and second relays are connected to the anode of the thyristor. The normally closed contact of the first relay is connected to one end of the resistor. The other end of the resistor is connected to the control electrode of the thyristor and the positive terminal of the capacitor. The cathode of the thyristor is connected to the positive power input terminal of the second relay. The normally open contact of the second relay is connected to the positive power input terminal of the time switch. The collector of the transistor is connected to the negative power input terminal of the first relay. The emitter of the transistor is connected to the negative power input terminal of the second relay, the negative power input terminal of the time switch, and the negative terminal of the capacitor.

5. The power supply control device for a mining area water intake station according to claim 1, characterized in that, The alarm circuit includes an electrically connected resistor, a transistor, a relay, an alarm, and a pressure sensor. The air inlet of the pressure sensor is installed in the opening of the water pump outlet pipe. The positive power input terminal of the pressure sensor is connected to the positive power input terminal of the relay and the control power input terminal. The signal output terminal of the pressure sensor is connected to one end of the resistor, and the other end of the resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay. The normally closed contact of the relay is connected to the positive power input terminal of the alarm. The negative power input terminal of the alarm is connected to the emitter of the transistor and the negative power input terminal of the pressure sensor.

Images