Power failure alarm device for underground coal mine

Abstract

The utility model discloses a power-off alarm device for an underground coal mine. The power-off alarm device comprises a power acquisition and conversion module, a dual-power automatic switching module, a voltage stabilization module, a power management module, a host sound-light alarm module, an auxiliary sound-light alarm module and a lithium battery module, the power supply acquisition and conversion module is used for acquiring secondary side voltages of transformers in a fan switch host and an auxiliary machine in real time; the dual-power-supply automatic switching module is connected with the two power supplies and is used for automatically switching between the two power supplies; the voltage stabilizing module is used for converting input voltage into stable 12V voltage and outputting the stable 12V voltage; the power management module is connected with the lithium battery module and the voltage stabilizing module; the power supply acquisition and conversion module adopted in the scheme has two paths of independent input, can accurately acquire secondary side voltage of transformers in a fan switch host and an auxiliary machine, and guarantees normal operation of underground equipment and personnel safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine safety, especially to a power failure alarm device for coal mine underground. BACKGROUND

[0002] The working environment of coal mine underground is complex and dangerous, and power supply is crucial for safety production. The early monitoring means of power supply state in coal mine underground is relatively simple, which cannot realize real-time monitoring, has low efficiency and has great safety hidden danger. Once power failure occurs during the inspection interval, it is difficult to discover and handle in time, which may lead to serious consequences such as gas accumulation and poor ventilation.

[0003] At present, when monitoring voltage, the traditional power failure alarm device for coal mine underground cannot accurately distinguish the slight voltage change or instantaneous power failure. Because voltage fluctuation is common in coal mine underground, it is easy to lead to misjudgment or omission, and cannot discover the real power failure in time and accurately. In addition, during long-term operation, the internal components of the traditional alarm device may age, damage and other problems. However, due to the lack of self-checking function, the device cannot discover its own failure in time. Therefore, when real alarm is needed, the device may not work normally, which cannot provide effective protection for underground safety. Therefore, the power failure alarm device for coal mine underground is proposed. UTILITY MODEL CONTENT

[0004] In order to overcome the above-mentioned defects of the prior art, in order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A power failure alarm device for coal mine underground comprises:

[0006] A power supply acquisition and conversion module, a dual power automatic switching module, a voltage stabilizing module, a power management module, a host sound and light alarm module, an auxiliary sound and light alarm module and a lithium battery module.

[0007] Preferably, the power supply acquisition and conversion module is used for real-time acquisition of the voltage of the transformer secondary side in the host and auxiliary machine switch fan.

[0008] Preferably, the dual power automatic switching module is connected with two power supplies respectively, and is used for automatic switching between the two power supplies.

[0009] Preferably, the voltage stabilizing module is used for converting the input voltage into stable 12V voltage output.

[0010] Preferably, the power management module is connected with the lithium battery module and the voltage stabilizing module.

[0011] Preferably, the host sound and light alarm module and the auxiliary sound and light alarm module respectively comprise a loudspeaker, a red light, a green light and a voice alarm control loop.

[0012] Preferably, the host sound and light alarm module and the auxiliary sound and light alarm module are connected with the power supply acquisition conversion module, 12V relay and power supply.

[0013] Preferably, when the power supply acquisition conversion module monitors that the input voltage of the fan switch host or auxiliary machine is disconnected, the corresponding host sound and light alarm module or auxiliary sound and light alarm module performs sound and light alarm.

[0014] Preferably, when the power supply acquisition conversion module is connected with 36V voltage, the green light is normally displayed, when any 36V is disconnected, the red light is lit and the voice alarm is sent when no 36V input is monitored.

[0015] Preferably, when the first input of the host sound and light alarm module is disconnected, the alarm voice is "host power failure, please repair".

[0016] Preferably, when the second input of the auxiliary sound and light alarm module is disconnected, the alarm voice is "auxiliary machine power failure, please repair".

[0017] Preferably, the lithium battery module is a 12V lithium battery, which is used for supplying power for the alarm device when the external power supply is disconnected. Beneficial effects

[0018] 1. The power supply acquisition conversion module adopted in the scheme has two independent inputs, can accurately acquire the voltage of the transformer secondary side in the fan switch host and auxiliary machine, can accurately judge whether the 36V or 127V voltage is normal, can quickly send an alarm signal once the voltage is abnormal, reduces the misjudgment and omission, improves the accuracy and timeliness of detection, and guarantees the normal operation of the underground equipment and the safety of personnel.

[0019] 2. Through the self-checking mechanism, each component of the alarm device can be detected regularly, including the power supply acquisition conversion module, the alarm control loop, the loudspeaker and the like. Once the component is found to be aged or damaged, a fault prompt can be sent in time, so that the staff can timely repair or replace, ensure that the alarm device can normally work at the critical moment, and improve the overall safety. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A system block diagram of the power failure alarm device for the coal mine underground is proposed for the utility model. DETAILED DESCRIPTION

[0021] Clearly, the described embodiments are merely a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by the person skilled in the art without making creative labor are within the protection scope of the present utility model.

[0022] As shown in Figure 1 The utility model provides a kind of power-off alarm device for underground coal mine, it include: power acquisition conversion module, dual power automatic switching module, voltage stabilizing module, power management module, host sound-light alarm module, auxiliary sound-light alarm module and lithium battery module;

[0023] Power acquisition conversion module is used to collect transformer secondary side voltage in fan switch host computer and auxiliary machine in real time;

[0024] Dual power automatic switching module is connected with two power supplies respectively, for automatic switching between two power supplies;

[0025] Voltage stabilizing module is used to convert input voltage into stable 12V voltage output;

[0026] Power management module is connected with lithium battery module and voltage stabilizing module;

[0027] Host sound-light alarm module and auxiliary sound-light alarm module include loudspeaker, red light, green light and voice alarm control loop respectively;

[0028] Host sound-light alarm module and auxiliary sound-light alarm module are connected with power acquisition conversion module, 12V relay and power supply;

[0029] When power acquisition conversion module monitors that the input voltage of fan switch host computer or auxiliary machine is disconnected, corresponding host sound-light alarm module or auxiliary sound-light alarm module carries out sound-light alarm;

[0030] The two independent inputs of the power supply acquisition and conversion module are connected to the fan switch main machine and the auxiliary machine transformer secondary side respectively in the coal mine, the dual power automatic switching module is correctly connected with the two power supplies, the state of the two power supplies is monitored in real time, when one power supply fails, it is switched to another power supply quickly to ensure continuous power supply of the equipment, the voltage after acquisition and conversion is input into the voltage stabilizing module, the stable 12V voltage is output to provide stable power for each module of the alarm device, the power management module is connected with the lithium battery module and the voltage stabilizing module, the battery charging process is managed in normal power supply, and the battery supplies power for the alarm device when the external power supply is powered off. The main machine and auxiliary machine sound and light alarm modules are connected with the power supply acquisition and conversion module, 12V relay and power supply respectively, once the power supply acquisition and conversion module detects that the input voltage of the fan switch main machine or auxiliary machine is disconnected, the corresponding alarm module drives the loudspeaker to emit sound through the voice alarm control loop, and the red light is lit to sound and light alarm;

[0031] When the power supply acquisition and conversion module is connected with 36V voltage, the green light is normally displayed, when any 36V is disconnected, the red light is lit and the voice alarm is emitted when no 36V input is monitored;

[0032] When the power supply acquisition and conversion module is connected with 36V voltage, a voltage monitoring circuit is arranged in the alarm device. When the monitoring circuit detects that the input voltage is normal, the output signal controls the green light to be lit, indicating that the equipment is in a normal working state. When any 36V input is disconnected, the monitoring circuit detects that there is no 36V input, changes the output signal, drives the red light to be lit on one side, and triggers the voice alarm control loop on the other side to make the loudspeaker emit an alarm sound;

[0033] When the first input of the main machine sound and light alarm module is disconnected, the alarm voice is "main machine power failure, please repair";

[0034] In the voice alarm control loop of the main machine sound and light alarm module and the auxiliary machine sound and light alarm module, specific voice files are respectively stored. When the first input (connected with the fan main machine 36V) is disconnected, the voice alarm control loop of the main machine sound and light alarm module receives the signal from the power supply acquisition and conversion module, calls the stored "main machine power failure, please repair" voice file, and plays it through the loudspeaker. When the second input (connected with the fan auxiliary machine 36V) is disconnected, the voice alarm control loop of the auxiliary machine sound and light alarm module calls the "auxiliary machine power failure, please repair" voice file to play;

[0035] When the second input of the auxiliary machine sound and light alarm module is disconnected, the alarm voice is "auxiliary machine power failure, please repair"

[0036] Among them, the 12V lithium battery with appropriate capacity is selected, such as the battery capacity meeting about 2 hours of alarm duration calculated according to the power consumption of the alarm device, when the external power supply is normally powered, the battery is in the charging standby state, when the external power supply is powered off, the power management module detects the disappearance of the main power supply and immediately switches to the battery power supply mode, the battery power is output to each module of the alarm device, maintains the normal operation of the alarm device and ensures about 2 hours of alarm duration;

[0037] The lithium battery module is a 12V lithium battery, which is used for supplying power for the alarm device when the external power supply is powered off;

[0038] Among them, a rectifier charging circuit is arranged in the alarm device, when 36V has input, the circuit rectifies 36V alternating current into 12V direct current, the rectified 12V direct current is connected to the power management module, the power management module is internally provided with a charging control chip and a detection circuit, the charging control chip controls the charging current according to the voltage state of the battery, when the detection circuit detects that the battery is fully charged, the charging control chip cuts off the charging loop, and the function of automatically disconnecting the charging is realized.

[0039] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A power failure alarm device for use in a coal mine, characterised in that, The utility model relates to a kind of wind turbine generator system power supply monitoring device, including: Power acquisition conversion module, dual power automatic switching module, voltage stabilizing module, power management module, main machine sound and light alarm module, auxiliary machine sound and light alarm module and lithium battery module; The power acquisition conversion module is used to collect the voltage of transformer secondary side in fan switch main machine and auxiliary machine in real time; The dual power automatic switching module is connected with two power sources respectively, and is used to automatically switch between two power sources; The voltage stabilizing module is used to convert input voltage into stable 12V voltage output; The power management module is connected with lithium battery module and voltage stabilizing module; The main machine sound and light alarm module and auxiliary machine sound and light alarm module include loudspeaker, red light, green light and voice alarm control loop respectively; The main machine sound and light alarm module and auxiliary machine sound and light alarm module are connected with power acquisition conversion module, 12V relay and power supply.

2. The power failure alarm device for use in a coal mine according to claim 1, wherein When the power acquisition conversion module monitors that the input voltage of fan switch main machine or auxiliary machine is disconnected, the corresponding main machine sound and light alarm module or auxiliary machine sound and light alarm module carries out sound and light alarm.

3. The power failure alarm device for use in a coal mine according to claim 1, wherein When the power acquisition conversion module is connected with 36V voltage, green light is displayed under normal circumstances, and when any 36V is disconnected, red light is lit and voice alarm is emitted when no 36V input is monitored.

4. The power failure alarm device for use in a coal mine according to claim 1, wherein When the first input is disconnected, the alarm voice of the main machine sound and light alarm module is "main machine power failure, please repair".

5. The power failure alarm device for use in a coal mine according to claim 1, wherein When the second input is disconnected, the alarm voice of the auxiliary machine sound and light alarm module is "auxiliary machine power failure, please repair".

6. The power failure alarm device for use in a coal mine according to claim 1, wherein The lithium battery module is 12V lithium battery, which is used to supply power for alarm device when external power supply is disconnected.

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