Unattended active explosion isolation and suppression composite device

Abstract

The invention provides an unattended active explosion isolation and suppression composite device which comprises a plurality of shock wave pressure sensors in different directions, the shock wave pressure sensors are used for collecting shock wave signals of an underground coal mine, the shock wave pressure sensors are connected with controllers in a one-to-one correspondence mode, the controllers are connected with active explosion isolation and suppression devices in a one-to-one correspondence mode, and the controllers are connected with one another. And when the shock wave signal acquired by any shock wave pressure sensor is greater than a set value, each controller sends out an electric signal, so that the corresponding active explosion suppression and isolation device is started. Explosion shock wave pressure signals in different directions are collected, active explosion suppression devices in different directions or in the same direction are triggered at the same time, different dangerous areas with combustion explosion tendency of an underground coal mine roadway are monitored, and fire spreading is effectively restrained.

Description

Technical Field

[0001] The invention relates to the technical field of explosion suppression equipment, in particular to an unattended active explosion isolation and suppression composite device. Background Art

[0002] In the process of coal mining, gas combustion and explosion can easily cause huge economic losses and serious casualties. In order to improve the safety level of coal mines, explosion suppression devices are installed in tunnels with gas and coal dust explosion hazards. They can respond quickly when an explosion occurs, form a mist explosion-proof area by spraying fire extinguishing media, and the fire extinguishing media is suspended for a long enough time to wait for the flame to arrive and extinguish it, extinguish the fire and suppress the explosion, and isolate the spread of the explosion flame. Hidden dangers are promptly handled and eliminated to avoid accidents. They are used to defend against fire and explosion accidents in coal mine tunnels, thereby minimizing the harm caused by the explosion.

[0003] Existing explosion isolation and suppression devices are prone to the following problems: the explosion suppressor is connected to the monitoring sensor, which can usually only trigger one explosion suppressor, resulting in limited explosion suppression effect; most of them are single-trigger working modes, which makes it inconvenient to trigger the explosion suppressor in time to suppress the explosion when a dangerous situation occurs; the power supply of the controller is not easy to adjust according to needs, and its flexibility and stability are poor. Summary of the invention

[0004] The present invention proposes an unmanned active explosion isolation and suppression composite device, which collects explosion shock wave pressure signals in different directions and simultaneously triggers active explosion isolation and suppression devices in different directions or the same direction, so as to monitor different dangerous areas in underground coal mine tunnels with combustion and explosion tendencies and effectively suppress the spread of fire.

[0005] The technical solution of the present invention is implemented as follows: an unattended active explosion isolation and suppression composite device includes a plurality of shock wave pressure sensors in different directions, which are used to collect shock wave signals in coal mines. The shock wave pressure sensors are connected to controllers in a one-to-one correspondence, and the controllers are connected to active explosion isolation and suppression in a one-to-one correspondence. The controllers are connected to each other. When any shock wave pressure sensor collects a shock wave signal greater than a set value, each controller sends an electrical signal to start the corresponding active explosion isolation and suppression device.

[0006] Furthermore, the controllers are connected to the emergency buttons one by one. When any emergency button is pressed, each controller sends an electrical signal to activate the corresponding active explosion suppression.

[0007] Furthermore, the controller is connected to the terminal via a wireless module; the controller is connected to the underground ring network of the coal mine via a communication cable.

[0008] Furthermore, the active explosion-suppressing device includes a high-pressure air chamber, a diverter plate, a fire-extinguishing agent tank and a nozzle connected in sequence. An explosion-venting plate and an excitation tube are arranged between the diverter plate and the high-pressure air chamber. The explosion-venting plate is used to close the outlet of the high-pressure air chamber. The excitation tube is connected to the corresponding controller. After the excitation tube receives the electrical signal from the controller, the excitation tube breaks the explosion-venting plate, and the high-pressure gas in the high-pressure air chamber enters the fire-extinguishing agent tank through the diverter plate, and drives the fire-extinguishing agent to be sprayed out through the nozzle.

[0009] Furthermore, a mechanical pressure switch is provided on the high-pressure gas cavity, and the mechanical pressure switch is used to monitor the gas pressure state in the high-pressure cavity in real time, and the mechanical pressure switch is connected to a corresponding controller.

[0010] Furthermore, the controller includes a CPU, which is connected to a power module. The power module includes an explosion-proof lithium-ion battery, a mining DC power supply, and an automatic switching module, an anti-reverse connection module, a dual overvoltage protection module, a dual overcurrent protection module, and a voltage stabilizing module connected in sequence. The voltage stabilizing module is connected to the CPU, and the CPU and the dual overcurrent protection module are both connected to a signal control output module, and the signal control output module is connected to an active explosion isolation and suppression device.

[0011] Furthermore, the controller also includes a clock module, a reset module, a wireless module, a lithium battery voltage AD sampling module, a control button and a warning module connected to the CPU.

[0012] Furthermore, a high-pressure ball valve is provided on the high-pressure gas chamber, one end of the high-pressure ball valve is connected to the inflation nozzle, and the other end is connected to the high-pressure gas chamber.

[0013] Furthermore, the shock wave pressure sensor includes two shock wave pressure sensors, which are arranged in opposite directions.

[0014] Furthermore, the active explosion-isolating and suppressing devices include two active explosion-isolating and suppressing devices, which are arranged in opposite directions or in the same direction.

[0015] Beneficial effects of the present invention:

[0016] The present invention can collect explosion shock wave pressure signals in different directions, and simultaneously trigger active explosion isolation and suppression devices in different or the same directions, so as to monitor different dangerous areas in underground coal mine tunnels with combustion and explosion tendencies and effectively suppress the spread of fire.

[0017] The present invention combines the two functions of explosion isolation and explosion suppression: when there is a tendency of combustion and explosion, by pressing the emergency button, the active explosion isolation and suppression device sprays the fire extinguishing medium toward the dangerous area to achieve explosion suppression; when the combustion is fierce and a strong explosion shock wave is generated, the shock wave pressure sensor receives the explosion shock wave signal, and the active explosion isolation and suppression device sprays the fire extinguishing medium to form an effective explosion isolation fog surface to achieve explosion isolation.

[0018] The controller of the present invention can collect the working status and environmental explosion information of each device in the device, and send the data to the terminal through the wireless LoRa module. The real-time collection, analysis and early warning of the data can realize unmanned duty in the on-site environment; it has three working modes of manual, automatic and remote triggering, and has a wide range of application scenarios.

[0019] Compared with the transmission mechanical explosion-proof device, this device has many advantages such as fast response time, simple installation, reliable triggering, high fire extinguishing efficiency, convenient maintenance, wide application scenarios and easy mobility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the controller;

[0023] Figure 3 This is a schematic diagram of the structure of an active explosion suppressor. 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] like Figure 1As shown, an unattended active explosion isolation and suppression composite device includes several shock wave pressure sensors in different directions, which are used to collect shock wave pressure signals in coal mines. The shock wave pressure sensors are connected to the controller in a one-to-one correspondence. For example, two shock wave pressure sensors are installed and fixed on the roof of the underground tunnel of the coal mine in reverse order, which is convenient for bidirectional collection of shock wave signals. Two active explosion isolation and suppression devices are fixed on the roof of the underground tunnel of the coal mine in reverse or in the same direction. The controller is connected to the active explosion isolation and suppression in a one-to-one correspondence. The shock wave pressure sensor collects the shock wave signal and sends it to the controller. For example, if the threshold value of the shock wave signal is 4kPa or 5kPa, when the threshold value of the shock wave signal is greater than 5KPa, the controller sends an electrical signal to drive the active explosion isolation and suppression device to spray the fire extinguishing medium; when the threshold value of the shock wave signal is less than 4KPa, the controller does not output an electrical signal.

[0027] Each controller is connected to each other. When any shock wave pressure sensor collects a shock wave signal greater than the set value, each controller sends an electrical signal to start the corresponding active explosion isolation and suppression device. The controllers are connected to the emergency buttons one by one. When any emergency button is pressed, each controller sends an electrical signal to start the corresponding active explosion isolation and suppression device. If the electrical signal is a current signal, the output current is greater than 300mA. The above-mentioned structure is set to facilitate the simultaneous triggering of multiple active explosion isolation and suppression devices, thereby improving the explosion suppression and explosion prevention effect.

[0028] The emergency button is used when on-site inspection personnel promptly discover that the underground environment of the coal mine has a tendency to burn or explode, and the explosion shock wave has not yet formed. The inspection personnel can press the emergency button to drive the active explosion suppression device to suppress the occurrence of combustion and explosion.

[0029] When the combustion is intense and produces a strong explosion shock wave, the shock wave pressure sensor receives the explosion shock wave signal, and the active explosion suppression device sprays the fire extinguishing medium to form an effective explosion-proof fog surface, thereby extinguishing the flame in the process of explosion propagation and isolating the further propagation of the explosion shock wave and the combustion flame.

[0030] The controller is connected to the terminal through a wireless module. The terminal can be a computer, mobile phone, etc. The wireless module is a wireless LoRa module. The controller sends data to the terminal through the wireless module, which is convenient for real-time data collection, analysis and early warning, and can realize unmanned duty in the on-site environment. The controller is connected to the underground ring network of the coal mine through a communication cable (RS485 communication) to upload the data to the monitoring substation.

[0031] Example 2

[0032] This embodiment is basically the same as embodiment 1, except that: Figure 3As shown, the active explosion-isolating and suppressing device includes a high-pressure gas chamber 1, a diverter plate 2, a fire extinguishing agent tank 3 and a nozzle 4 which are connected in sequence. An explosion-relief plate 5 and an excitation tube 6 are fixed between the diverter plate 2 and the high-pressure gas chamber 1. The explosion-relief plate 5 is used to close the outlet of the high-pressure gas chamber 1. The excitation tube 6 is located in the diverter plate 2 and is directly opposite to the center of the explosion-relief plate 5. The excitation tube 6 can be a blasting tube, an instantaneous detonator, etc.

[0033] A mechanical pressure switch (not shown) is installed at the tail of the high-pressure gas chamber 1. The mechanical pressure switch can be purchased on the market. The model is PS20-QD. It is a passive dry node signal. The pressure threshold can be set. The mechanical pressure switch is used to monitor the air pressure status in the high-pressure gas chamber 1 in real time. The high-pressure gas chamber 1 is a high-pressure nitrogen chamber.

[0034] like Figure 1 As shown, the excitation tube 6 and the mechanical pressure switch are connected to the intrinsically safe junction box through a communication cable, and the corresponding controller is connected to the intrinsically safe junction box through a communication cable. After the excitation tube 6 receives the electrical signal from the controller, the excitation tube 6 breaks the explosion relief plate 5, and the high-pressure gas in the high-pressure gas cavity 1 enters the fire extinguishing agent bin 3 through the diverter plate 2, and drives the fire extinguishing agent to be sprayed out through the nozzle 4. Through the cooperation of the excitation tube 6 and the explosion relief plate 5, the active explosion isolation and suppression device can spray the fire extinguishing medium at a speed of less than 15ms, forming an effective flame suppression and explosion suppression mist surface, thereby preventing the flame generated by the explosion combustion from further spreading.

[0035] When the pressure in the high-pressure air chamber 1 is less than the set value or greater than the set value, the corresponding switch signal is output to the controller, and the controller transmits it to the terminal through the wireless module. Figure 3 As shown, a high-pressure ball valve 7 is provided on the high-pressure air chamber 1, one end of the high-pressure ball valve 7 is connected to the inflation nozzle 8, and the other end is connected to the high-pressure air chamber 1. When the high-pressure air chamber 1 needs to be inflated, the high-pressure ball valve 7 is opened, and the high-pressure air chamber 1 is inflated through the inflation nozzle 8.

[0036] Example 3

[0037] This embodiment is basically the same as embodiment 1 or 2, except that: Figure 2 As shown, the controller includes a CPU, which is connected to a power module. The power module includes an explosion-proof lithium-ion battery, a mining DC power supply, and an automatic switching module, an anti-reverse connection module, a double overvoltage protection module, a double overcurrent protection module and a voltage stabilizing module which are connected in sequence. The voltage stabilizing module is connected to the CPU, and the CPU and the double overcurrent protection module are both connected to a signal control output module, which is connected to an exciter of an active explosion isolation and suppression device.

[0038] The mine DC power supply is used for installation in underground tunnels of coal mines at one time and the installation position is not frequently changed. It can realize long-term operation of the device and avoid maintenance. The explosion-proof lithium-ion battery is used for temporary installation in underground tunnels of coal mines. It is easy to install and flexible to move. The battery has an audible and visual alarm function for undervoltage and is quick and convenient to replace. Through the setting of the above power module, the controller has two power supply modes. One is powered by a mine DC power supply, which is connected through the DC power supply terminal to provide a stable and reliable working power supply to the controller; the other is powered by a built-in explosion-proof lithium-ion battery, which is characterized by quick disassembly and charging. When there is an external power supply, the circuit can automatically switch to the external mine DC power supply for power supply. The power supply has anti-reverse connection, double overvoltage, and double overcurrent protection circuits, and finally outputs a 3.3V DC power supply to the CPU through a voltage stabilizing circuit.

[0039] The controller also includes a clock module, a reset module, a lithium battery voltage AD sampling module, a control button and a warning module connected to the CPU. The clock module and the reset module are set to ensure the normal operation of the CPU; the lithium battery voltage AD sampling module collects and monitors the working status signal of the lithium battery itself, and the single-chip AD sampling is used to determine whether the lithium battery is over-voltage, under-voltage or normal.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An unattended active explosion isolation and suppression composite device, characterized in that: It includes several shock wave pressure sensors in different directions, which are used to collect shock wave signals in coal mines. The shock wave pressure sensors are connected to the controllers one by one, and the controllers are connected to the active explosion isolation and suppression devices one by one. The controllers are connected to each other. When any shock wave pressure sensor collects a shock wave signal greater than a set value, each controller sends an electrical signal to start the corresponding active explosion isolation and suppression device.

2. The unattended active explosion isolation and suppression composite device according to claim 1 is characterized in that: The controllers are connected to the emergency buttons one by one. When any emergency button is pressed, each controller sends an electrical signal to activate the corresponding active explosion suppression.

3. The unattended active explosion isolation and suppression composite device according to claim 1 is characterized in that: The controller is connected to the terminal through a wireless module; the controller is connected to the underground ring network of the coal mine through a communication cable.

4. The unattended active explosion isolation and suppression composite device according to claim 1 is characterized in that: The active explosion-suppressor includes a high-pressure gas chamber, a diverter plate, a fire-extinguishing agent tank and a nozzle which are connected in sequence. An explosion-venting plate and an excitation tube are arranged between the diverter plate and the high-pressure gas chamber. The explosion-venting plate is used to close the outlet of the high-pressure gas chamber. The excitation tube is connected to the corresponding controller. After the excitation tube receives the electrical signal from the controller, the excitation tube breaks the explosion-venting plate, and the high-pressure gas in the high-pressure gas chamber enters the fire-extinguishing agent tank through the diverter plate, and drives the fire-extinguishing agent to be sprayed out through the nozzle.

5. The unattended active explosion isolation and suppression composite device according to claim 4 is characterized in that: A mechanical pressure switch is provided on the high-pressure gas cavity. The mechanical pressure switch is used to monitor the gas pressure state in the high-pressure cavity in real time. The mechanical pressure switch is connected to a corresponding controller.

6. An unattended active explosion isolation and suppression composite device according to claim 1, 2 or 3, characterized in that: The controller includes a CPU, which is connected to a power module. The power module includes an explosion-proof lithium-ion battery, a mining DC power supply, and an automatic switching module, an anti-reverse connection module, a double overvoltage protection module, a double overcurrent protection module and a voltage stabilizing module which are connected in sequence. The voltage stabilizing module is connected to the CPU, and the CPU and the double overcurrent protection module are both connected to a signal control output module, and the signal control output module is connected to an active explosion isolation and suppression device.

7. The unattended active explosion isolation and suppression composite device according to claim 6 is characterized in that: The controller also includes a clock module, a reset module, a wireless module, a lithium battery voltage AD sampling module, a control button and a warning module connected to the CPU.

8. The unattended active explosion isolation and suppression composite device according to claim 5 is characterized in that: A high-pressure ball valve is arranged on the high-pressure gas cavity, one end of the high-pressure ball valve is connected to the inflation nozzle, and the other end is connected to the high-pressure gas cavity.

9. The unattended active explosion isolation and suppression composite device according to claim 1, characterized in that: The shock wave pressure sensors include two shock wave pressure sensors, which are arranged in opposite directions.

10. The unattended active explosion isolation and suppression composite device according to claim 9, characterized in that: The active explosion-isolating and suppressing devices include two active explosion-isolating and suppressing devices, which are arranged in opposite directions or in the same direction.

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