A coal mine fire prevention and extinguishing main control device based on power storage solution

Abstract

The present invention discloses a coal mine fire prevention and extinguishing main control device based on a power storage scheme, which belongs to the field of fire protection and comprises a data acquisition module, a fire extinguishing control module, a power management module, a visual human-computer interaction module and a collaborative linkage communication module. The input end of the power management module is connected to an intrinsically safe power supply, and the output end of the power management module supplies power to the data acquisition module, the fire extinguishing control module, the visual human-computer interaction module and the collaborative linkage communication module respectively. The fire prevention and extinguishing device host designed in the present application integrates an internal energy storage module by innovating in the power supply architecture scheme, and takes power and stores energy from an external power supply module in a small current manner, which is used to power low-frequency and high-power-consumption component units such as an electric ball valve and a battery valve in the fire extinguishing control module, so as to achieve the dual problems of difficulty in power supply equipment and high power consumption of power receiving equipment, and to enable multiple devices to work simultaneously over a long distance.

Description

Technical Field

[0001] The invention relates to the technical field of fire protection, and in particular to a main control device for preventing and extinguishing fire in coal mines based on a power storage scheme. Background Art

[0002] Coal mine power supply equipment is usually powered by a mine intrinsically safe power supply (abbreviated as "intrinsically safe power supply"). An intrinsically safe power supply is a power supply equipment used in explosive environments. The intrinsically safe power supply limits the output power to ensure that the energy received by the powered equipment is within a safe range. Therefore, the intrinsically safe power supply usually has the characteristic of weak output power. Once the power of the powered equipment is slightly larger, there will be problems such as being unable to carry load or poor working stability.

[0003] Improving the stability of long-distance load-carrying operation of powered equipment is a common problem in the industry. There are generally two common solutions to this problem. One is to study the power supply equipment. The typical solution is to innovate the circuit architecture of the intrinsically safe power supply module within the scope of the explosion-proof standard requirements to maximize the output capacity of the intrinsically safe power supply. The second is to study the powered equipment. The typical idea is to reduce the energy loss during long-distance transmission by reducing the power consumption of the equipment and the starting current of the equipment, thereby improving the working distance of the equipment during long-distance power supply.

[0004] In the automatic fire prevention and extinguishing control system for coal mines, the main engine includes an electric ball valve or solenoid valve, which is used to control the spraying of fire extinguishing media (water, dry powder, heptafluoropropane, etc.). The electric ball valve or solenoid valve does not work under normal conditions, and will only work when a fire occurs or is about to occur. Therefore, the electric ball valve or solenoid valve has the characteristics of low action frequency and large working current. Summary of the invention

[0005] The purpose of the present invention is to provide a coal mine fire prevention and extinguishing main control device based on a power storage solution to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A coal mine fire prevention and extinguishing main control device based on a power storage solution comprises a data acquisition module, a fire extinguishing control module, a power management module, a visual human-computer interaction module and a collaborative linkage communication module, wherein the input end of the power management module is connected to an intrinsically safe power supply, and the output end of the power management module supplies power to the data acquisition module, the fire extinguishing control module, the visual human-computer interaction module and the collaborative linkage communication module respectively, the data acquisition module is connected to a fiber optic temperature measurement host and a communication demodulation module of a smoke, flame or carbon monoxide sensor, the fire extinguishing control module is an electric ball valve or a solenoid valve, which is fixed on a main control device, one end of which is connected to a fire extinguishing medium, and the other end is connected to a spraying device.

[0008] As a further technical solution of the present invention: the power management module includes an external power supply module and an internal energy storage module. The external power supply module is used to power the data acquisition modules, the visual human-computer interaction module, and the collaborative linkage communication module component units of the host. The internal energy storage module is used to power the electric ball valve and the battery valve component units in the fire extinguishing control module. When the internal energy storage module does not execute the electric ball valve and the battery valve action, it draws electricity and stores energy from the external power supply module in a small current. The energy storage medium is a rechargeable battery or a supercapacitor. When the energy storage module draws electricity and stores energy from the external power supply module in a small current, it has a charging voltage limiting protection function.

[0009] As a further technical solution of the present invention: the internal energy storage module includes a charging control unit, a boost circuit unit, a protection circuit and a current limiting module, one end of the current limiting module is connected to the input voltage Ui, the other end of the current limiting module is connected to the source of the MOS tube Q1, the gate of the MOS tube Q1 is connected to the charging control unit, the drain of the MOS tube Q1 is connected to the positive electrode of the battery pack E and the source of the MOS tube Q2, the drain of the MOS tube Q2 is connected to the boost circuit, the gate of the MOS tube Q2 is connected to the protection circuit, and the other end of the boost circuit is connected to the output voltage Uo.

[0010] As a further technical solution of the present invention: the current limiting module adopts the SLM6500 chip.

[0011] As a further technical solution of the present invention: the protection circuit adopts XB8089D chip.

[0012] As a further technical solution of the present invention: the charging control unit adopts a switch control technology combining a triode and a MOS tube.

[0013] As a further technical solution of the present invention: the fire extinguishing medium is water, dry powder or heptafluoropropane.

[0014] As a further technical solution of the present invention: the fire extinguishing control module includes a control chip U1, a MOS tube Q1, a transistor Q2 and a ball valve M, pins 5 and 6 of the chip U1 are connected to one end of the ball valve M, pins 7 and 8 of the chip U1 are connected to the other end of the ball valve M, pin 1 of the chip U1 is connected to the resistor R1, pin 2 of the chip U1 is connected to the resistor R2, pin 3 of the chip U1 is grounded, pin 4 of the chip U1 is connected to the cathode of the diode D1 and the cathode of the diode D2, the anode of the diode D1 is connected to the battery terminal VBAT+, the anode of the diode D2 is connected to the drain of the MOS tube Q1, the source of the MOS tube Q1 is connected to the resistor R3, the resistor R4, the resistor R5 and the base of the transistor Q2, the collector of the transistor Q2 is connected to the other end of the resistor R5, the resistor R6 and the gate of the MOS tube Q1, and the source of the transistor Q2 is connected to the other end of the resistor R3, the other end of the resistor R4 and the external power supply terminal Vin.

[0015] As a further technical solution of the present invention: the model of the chip U1 is RZ7889.

[0016] As a further technical solution of the present invention: the visual human-computer interaction module includes emergency stop and emergency spray buttons, and the collaborative linkage communication module includes an audible and visual alarm and a power-off controller.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The fire extinguishing device host designed in this application supports the collection of parameters such as smoke, flame, CO, etc. By comparing the detected parameters with the preset parameters, automatic fire extinguishing control is immediately implemented when the preset parameters are exceeded. The electric ball valve, solenoid valve and other devices that perform fire extinguishing control are integrated into the host, and the fire extinguishing control logic is stored in the host main control chip, which can realize local control and can run offline even if the underground LAN and the ground control console are disconnected.

[0019] 2. The fire extinguishing device host designed in this application innovates in the power supply architecture solution, integrates an internal energy storage module, draws electricity and stores energy from the external power supply module in a small current, and is used to power low-frequency, high-power consumption component units such as the electric ball valve and battery valve in the fire extinguishing control module. This enables multiple devices to work simultaneously over long distances despite the dual problems of difficulty in obtaining power from the power supply equipment and high power consumption of the power receiving equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall system diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the implementation principle of the internal energy storage module of the present invention.

[0022] Figure 3 This is the circuit diagram of the fire extinguishing control module.

[0023] Figure 4 This is the circuit diagram of the internal energy storage module. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] See also Figure 1A fire prevention and extinguishing main control device for coal mines based on a power storage solution. The main unit includes a data acquisition module, a fire extinguishing control module, a power management module, a visual human-computer interaction module, and a collaborative linkage communication module.

[0027] Among them, the data acquisition module is connected to the communication demodulation module of the distributed optical fiber temperature measurement host, smoke, flame or carbon monoxide sensor and other detection equipment, which is the perception layer of the system, collecting whether the current ambient temperature exceeds the threshold, whether there is smoke, flame, carbon monoxide gas in the environment. The fire extinguishing control module is an electric ball valve or solenoid valve, which is fixed on the main control device, one end of which is connected to the fire extinguishing medium (water, dry powder, heptafluoropropane, etc.), and the other end is connected to the spraying device. When the temperature, smoke, flame or carbon monoxide detected in the environment exceeds the set threshold, the fire extinguishing spraying control of the corresponding position is executed. The visual human-computer interaction module is used to display the data of temperature, smoke, flame, CO, etc., the operation status of the equipment, and the execution status of the fire extinguishing device; the visual human-computer interaction module also has manual control buttons of "emergency stop" and "emergency spray" to solve the problem of the equipment spraying by mistake or not spraying in the case of misjudgment. The collaborative linkage communication module is equipped with a communication function, which can communicate with the alarm and the electromechanical equipment power-off device, and is used to issue disaster instructions when a disaster occurs, so that the alarm can sound and light alarm, and control the large electromechanical equipment to shut down and stop running. The power management module has external power supply and internal energy storage management functions. The external power supply is used to power the data acquisition modules and visual human-computer interaction modules of the host, the collaborative linkage communication module and other components with low power consumption. The internal energy storage module is used to power the low-frequency and high-power component units such as the electric ball valve and battery valve in the fire extinguishing control module. When the internal energy storage module does not perform the action of the electric ball valve and the battery valve, it takes power from the external power supply module in a small current to store energy, and the energy storage medium is a rechargeable battery, a super capacitor, etc. When the energy storage module takes power from the external power supply module in a small current to store energy, it has a charging voltage limiting protection function, which meets the relevant standard requirements for underground charging in coal mines. The energy storage module includes a charging circuit unit, a boost circuit unit, and an intrinsically safe power processing unit. It also has overcharge, over-discharge, overcurrent, overheating, and short circuit protection functions. Each unit adopts a casting solution to meet the relevant requirements for use in explosive environments. The energy storage module is only used to power the electric ball valve and battery valve in the fire extinguishing control module, and is not connected in parallel with an external power supply to power the host modules in parallel.

[0028] Example 2

[0029] On the basis of Example 1, Figure 2 and 3As shown, the internal energy storage module includes a charging control unit, a boost circuit unit, a protection circuit and a current limiting module. One end of the current limiting module is connected to the input voltage Ui, and the other end of the current limiting module is connected to the source of the MOS tube Q1. The gate of the MOS tube Q1 is connected to the charging control unit. The drain of the MOS tube Q1 is connected to the positive electrode of the battery pack E and the source of the MOS tube Q2. The drain of the MOS tube Q2 is connected to the boost circuit, and the gate of the MOS tube Q2 is connected to the protection circuit. The other end of the boost circuit is connected to the output voltage Uo. Among them, the current limiting module adopts the SLM6500 chip. The protection circuit adopts the XB8089D chip. The charging control unit adopts the switch control technology combining the triode and the MOS tube.

[0030] Example 3

[0031] On the basis of Example 1, Figure 4 As shown, the fire extinguishing control module includes a control chip U1, a MOS tube Q1, a transistor Q2 and a ball valve M. The 5th and 6th pins of the chip U1 are connected to one end of the ball valve M, the 7th and 8th pins of the chip U1 are connected to the other end of the ball valve M, the 1st pin of the chip U1 is connected to the resistor R1, the 2nd pin of the chip U1 is connected to the resistor R2, the 3rd pin of the chip U1 is grounded, the 4th pin of the chip U1 is connected to the cathode of the diode D1 and the cathode of the diode D2, the anode of the diode D1 is connected to the battery terminal VBAT+, the anode of the diode D2 is connected to the drain of the MOS tube Q1, the source of the MOS tube Q1 is connected to the resistor R3, the resistor R4, the resistor R5 and the base of the transistor Q2, the collector of the transistor Q2 is connected to the other end of the resistor R5, the resistor R6 and the gate of the MOS tube Q1, and the source of the transistor Q2 is connected to the other end of the resistor R3, the other end of the resistor R4 and the external power supply terminal Vin. The model of the chip U1 is RZ7889.

[0032] Among them, Q1, Q2, R3, R4, and R5 form a charging control module. When the charging control signal is at a high level, Q1 is turned on and the charging function is turned on. When the charging control signal is at a low level, Q1 is not turned on and the charging function is turned off.

[0033] SLM6500, U2, R2, and C3 form a charging current limiting circuit. The reference voltage across R2 is 100mV. The charging current can be controlled by adjusting the resistance value of R2. This design controls the current at Iout=100mV / R2.

[0034] R1, C1, and U1 form a battery overcharge and over-discharge protection circuit. When the battery voltage is charged to 4.25V, U1 disconnects the charging circuit and the battery stops charging; when the battery discharges to 2.5V, U1 disconnects the discharge circuit and the battery stops discharging.

[0035] The working principle is as follows: Take a set of coal mine underground fire prevention and extinguishing device host as an example. The host includes data acquisition module, fire extinguishing control module, power management module, visual human-computer interaction module, and collaborative linkage communication module. There are two schemes for the power management module architecture, one is pure external power supply, and the other is the power supply architecture of external power supply + energy storage module. Choose to use a 18V / 1.1A intrinsically safe power supply module to power the host (that is, the open circuit voltage of the power supply is 18V and the maximum output current is 1.1A). The total power consumption of the host is 18V / 550mA, of which the fire extinguishing control module has the largest power consumption, which is 18V / 400mA. The total power consumption of other modules is 18V / 150mA, and the minimum working voltage of the host is 9V. From the power consumption distribution, it can be seen that when a pure external power supply is used for power supply, if the fire extinguishing control module is started, the device is calculated according to the maximum power consumption of 18V / 550mA, and a 18V / 1.1A intrinsically safe power supply can only power one host. If the cable impedance is 12.8Ω / Km, the maximum load distance of the equipment is 320m.

[0036] If the power supply architecture of external power supply + energy storage module is used, the energy storage module can be charged at 18V / 50mA. In this case, the maximum power supplied by the external power supply to the host is 18V / 200mA, and the maximum load distance of the device is 878m. When the energy storage module is fully charged, the maximum power supplied by the external power supply to the host is 18V / 150mA, and the maximum load distance of the device is 1171m. When two hosts are loaded at the same time, the maximum load distance is 586 meters.

[0037] This design is aimed at the special application scenario of the fire extinguishing control system for coal mines. Based on the innovation of the power supply architecture of the powered equipment, the low-frequency and high-power consumption components in the host are separated from the original external power supply unit, and powered by an internal power supply unit alone. The internal power supply unit collects energy in the form of electricity storage. It collects energy when the power consumption of the powered equipment is low, and releases energy when the power consumption of the powered equipment is high, to ensure that the external power supply equipment always works at a lower power level. Through this design, the purpose of simultaneously powering multiple hosts over long distances can be achieved using one power supply.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A coal mine fire prevention and extinguishing main control device based on a power storage solution, comprising a data acquisition module, a fire extinguishing control module, a power management module, a visual human-computer interaction module and a collaborative linkage communication module, characterized in that: The input end of the power management module is connected to the intrinsically safe power supply, and the output end of the power management module supplies power to the data acquisition module, the fire extinguishing control module, the visual human-computer interaction module and the collaborative linkage communication module respectively. The data acquisition module is connected to the optical fiber temperature measurement host and the communication demodulation module of the smoke, flame or carbon monoxide sensor. The fire extinguishing control module is an electric ball valve or solenoid valve, which is fixed on the main control device, one end of which is connected to the fire extinguishing medium, and the other end is connected to the spraying device; The power management module includes an external power supply module and an internal energy storage module. The external power supply module is used to supply power to the data acquisition modules, the visual human-computer interaction module, and the coordinated linkage communication module component units of the host. The internal energy storage module is used to supply power to the electric ball valve and the solenoid valve component units in the fire extinguishing control module. When the electric ball valve and the solenoid valve are not operated, the internal energy storage module takes power from the external power supply module in a small current to store energy. The energy storage medium is a rechargeable battery or a super capacitor. When the energy storage module takes power from the external power supply module in a small current to store energy, it has a charging voltage limiting protection function. The internal energy storage module includes a charging control unit, a boost circuit unit, a protection circuit and a current limiting module. One end of the current limiting module is connected to the input voltage Ui, the other end of the current limiting module is connected to the source of the MOS tube Q1, the gate of the MOS tube Q1 is connected to the charging control unit, the drain of the MOS tube Q1 is connected to the positive electrode of the battery pack E and the source of the MOS tube Q2, the drain of the MOS tube Q2 is connected to the boost circuit, the gate of the MOS tube Q2 is connected to the protection circuit, and the other end of the boost circuit is connected to the output voltage Uo.

2. A coal mine fire prevention and extinguishing main control device based on a power storage solution according to claim 1, characterized in that: The current limiting module adopts the SLM6500 chip.

3. A coal mine fire prevention and extinguishing main control device based on a power storage solution according to claim 1, characterized in that: The protection circuit adopts XB8089D chip.

4. A coal mine fire prevention and extinguishing main control device based on a power storage solution according to claim 1, characterized in that: The charging control unit adopts a switch control technology combining a triode and a MOS tube.

5. A coal mine fire prevention and extinguishing main control device based on a power storage solution according to claim 1, characterized in that: The fire extinguishing medium is water, dry powder or heptafluoropropane.

6. A coal mine fire prevention and extinguishing main control device based on a power storage solution according to claim 1, characterized in that: The fire extinguishing control module includes a control chip U1, a MOS tube Q1, a transistor Q2 and a ball valve M. Pins 5 and 6 of the chip U1 are connected to one end of the ball valve M, pins 7 and 8 of the chip U1 are connected to the other end of the ball valve M, pin 1 of the chip U1 is connected to the resistor R1, pin 2 of the chip U1 is connected to the resistor R2, pin 3 of the chip U1 is grounded, pin 4 of the chip U1 is connected to the cathode of the diode D1 and the cathode of the diode D2, the anode of the diode D1 is connected to the battery terminal VBAT+, the anode of the diode D2 is connected to the drain of the MOS tube Q1, the source of the MOS tube Q1 is connected to the resistor R3, the resistor R4, the resistor R5 and the base of the transistor Q2, the collector of the transistor Q2 is connected to the other end of the resistor R5, the resistor R6 and the gate of the MOS tube Q1, and the source of the transistor Q2 is connected to the other end of the resistor R3, the other end of the resistor R4 and the external power supply terminal Vin.

7. A coal mine fire prevention and extinguishing main control device based on the power storage scheme according to claim 6, characterized in that: The model of the chip U1 is RZ7889.

8. A coal mine fire prevention and extinguishing main control device based on a power storage solution according to claim 1, characterized in that: The visual human-computer interaction module includes emergency stop and emergency spray buttons, and the collaborative linkage communication module includes an audible and visual alarm and a power-off controller.

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