Remote self-adaptive closed air bag for catastrophe roadway

Abstract

A catastrophe roadway remote self-adaptive closed air bag comprises an intrinsic safety type air bag storage box, a gas generation module and an expansion blocking module. The intrinsic safety type airbag storage box is used for storing the gas generation module and the expansion blocking module; the gas generation module is used for storing and releasing inert gas and located above the expansion blocking module, so that the inert gas rapidly enters the high-strength flexible airbag through the pressurization effect; the expansion blocking module is used for blocking poisonous and harmful gas generated by explosion, connected with the gas generation module and located below the gas generation module. According to the utility model, the mine multi-parameter fire hazard detector is combined with human perception, an underground fire source and a gas over-limit source are sensed in advance, identified dangerous factors are transmitted to the intrinsic safety type control motor and the alarm through electric signals, the gas generation module is triggered, and early warning of underground safety accidents is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire rescue sealing airbags, in particular to a remote adaptive sealing airbag for a disaster tunnel. Background Art

[0002] As the depth of coal mining gradually increases, the difficulty of underground tunnel excavation increases, and the complex geological conditions cause various coal mine safety accidents, among which mine fires and gas explosions occur frequently, which are easy to damage the support structure of underground tunnels, causing casualties of workers, seriously affecting the evacuation and rescue work of personnel, and increasing the risk of the spread of accidents. At present, mines in my country mainly use explosion-proof and explosion-suppression devices to reduce the hazards of fire and explosion accidents. From the execution principle, it is mainly divided into passive explosion-proof technology and automatic explosion-proof technology. Passive explosion-proof technology uses the driving force of the explosion shock wave to make the device operate, such as water bags, rock powder troughs, water bags unhooking and scattering flame extinguishers, etc., to form an explosion-suppression belt, extinguish the flames generated by the explosion, and prevent the spread of the explosion. However, passive explosion-proof technology is mostly a one-time device, in which the water inside the explosion-proof water bag is easy to evaporate and easily mixed with coal dust or other impurities; rock powder is very easy to get damp, which greatly reduces the explosion-proof fire extinguishing ability. Although the automatic explosion-proof technology solves the shortcomings of passive explosion-proof through active spraying, such as MK-2 explosion suppressor, YBW-I type power-free explosion suppression device, etc., it still has some shortcomings. Since most of the inhibitors currently used are inert dry powder, water mist, etc., and the release power of the inhibitors is insufficient, the coverage area is limited and the duration is short. Therefore, a technology suitable for underground fire rescue, temporary blocking of local gas accumulation or over-limit and other emergency evacuation scenarios is needed, which can achieve rapid blocking of local high-temperature fire points. Utility Model Content

[0003] In order to overcome the above technical problems, the purpose of the utility model is to provide a remote adaptive sealing airbag for disaster tunnels. The gas generating module and the valve assembly control the automatic release of the high-strength flexible airbag, so that the explosion-proof airbag can expand rapidly during the operation of the device and the dangerous fire area can be closed in time. During the expansion of the high-strength flexible airbag, the pressure monitoring device monitors and controls the pressure difference between the inside and outside of the airbag and the multi-point pressure state of the airbag door frame. The magnetic patch attached to the outer surface of the airbag and the fixed patch pre-installed on the tunnel wall are adsorbed to each other to ensure the airtightness of the high-strength flexible airbag and the tunnel wall.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A remote adaptive closed airbag for a disaster tunnel, comprising an intrinsically safe airbag storage box 1, a gas generating module 2, and an expansion barrier module 3;

[0006] The intrinsically safe airbag storage box 1 is used to store the gas generation module 2 and the expansion barrier module 3 to prevent damage to the internal devices in the event of an accident, thereby preventing a secondary accident.

[0007] The gas generation module 2 is used to store and release the inert gas and is located above the expansion barrier module 3, so that the inert gas can quickly enter the high-strength flexible airbag 3-1 through the pressurization effect.

[0008] The expansion barrier module 3 is used to block the toxic and harmful gases generated by the explosion, is connected to the gas generation module 2, and is located below the gas generation module 2.

[0009] Furthermore, the intrinsically safe airbag storage box 1 includes a multi-parameter fire detector for mining 1-1, an intrinsically safe control motor 1-2, an alarm 1-3, a remote control module 1-4, an intrinsically safe DC power supply 1-5, and an automatic opener and closeer 1-6;

[0010] A multi-parameter fire detector 1-1 for mining is installed inside the intrinsically safe airbag storage box 1. The multi-parameter fire detector 1-1 for mining is connected to the intrinsically safe control motor 1-2 and the alarm 1-3 respectively through thermoplastic insulated wires, and is located above the intrinsically safe control motor 1-2 and the alarm 1-3; the detector 1-1 can convert characteristic physical quantities of fire, such as temperature, smoke, gas and radiation light intensity, into electrical signals and import them into the intrinsically safe control motor 1-2, and send an alarm signal to the alarm 1-3. The intrinsically safe control motor 1-2 uses the electrical signal to control the gas generating module 2.

[0011] A remote control module 1-4 is arranged inside the intrinsically safe airbag storage box 1. Through artificial perception of danger, the remote control module 1-4 is used to transmit a start signal to the intrinsically safe control motor 1-2. The remote control module 1-4 is connected to the intrinsically safe control motor 1-2 and the alarm 1-3 through thermoplastic insulated wires and is located below the two. The intrinsically safe airbag storage box 1 is equipped with an intrinsically safe DC power supply 1-5, which is located below the remote control module 1-4 and provides regulated current for various devices through a series circuit.

[0012] The side of the intrinsically safe airbag storage box 1 is provided with a baffle, and the outer side of the baffle is an automatic opener and closeer 1-6, which is used to release the high-strength flexible airbag 3-1

[0013] The size of the intrinsically safe airbag storage box 1 is 100 cm long, 30 cm wide and 150 cm high. The box body is made of aluminum alloy and the explosion-proof mark is ExibI, which can effectively protect the equipment in the box during daily production in the tunnel.

[0014] Furthermore, the mining multi-parameter fire detector 1-1 is composed of three independent fire sensors, equipped with multi-level fire characterization signal judgment sensitivity, the shell material is intrinsically safe explosion-proof metal, the working environment temperature is 20℃~100℃, the working environment humidity is 5%~95%, and the working voltage is 24VDC.

[0015] The multi-parameter fire detector 1-1 for mining includes a temperature sensor 1-1-1 for mining, a smoke sensor 1-1-2 for mining, and a methane sensor 1-1-3. The temperature sensor 1-1-1 for mining, the smoke sensor 1-1-2 for mining, and the methane sensor 1-1-3 are located at the same level above the intrinsically safe control motor 1-2 and are connected via parallel circuit wiring.

[0016] The mining temperature sensor 1-1-1 is a GWP200-C temperature sensor, which adopts an intrinsically safe explosion-proof alloy housing, the explosion-proof mark is ExibI, and passive contact temperature measurement. The temperature sensing element is a PT100 platinum thermal resistor, the temperature measurement range is 0-200℃, the allowable error is ±1℃, and it is suitable for mixed places with explosive gases underground.

[0017] The mining smoke sensor 1-1-2 is a GQQ-0.1 mining smoke sensor, which uses a gas-sensitive probe element. When the smoke concentration in the underground tunnel is ≥ 0.1 mg / m 3 When the alarm is on, a low-frequency electrical signal is output to the intrinsically safe control motor 1-2 and the alarm 1-3.

[0018] The mining methane sensor 1-1-3 is an APEG-D type methane sensor, which uses a gas-sensitive probe element, has a measurement accuracy of ≤±1%FS, and a working voltage of 24VDC. When the underground gas concentration exceeds the limit, a low-frequency electrical signal is output to the intrinsically safe control motor 1-2 and the alarm 1-3.

[0019] The intrinsically safe control motor 1-2 is an execution and connection device for the dangerous characteristic signal recognition and gas generation module 2, and is used to transmit the electrical signal of the mining multi-parameter fire detector 1-1. The casing is made of intrinsically safe explosion-proof alloy, and the motor power is less than 750W.

[0020] The alarm 1-3 is a YS-01H mining sound and light alarm with an alarm decibel of 120dB, an explosion-proof mark of ExibI, a working power of 25W, and transmits an alarm signal to the mining multi-parameter fire detector 1-1.

[0021] The remote control module 1-4 is an industrial-grade remote acquisition and control module, which provides switch input acquisition, relay output, high-frequency counting and other functions of passive nodes; it adopts full digital encrypted wireless transmission, has dual Ethernet ports for connection, is controlled by remote commands, and realizes remote control with the ground PLC wireless communication terminal. 10-30VDC wide voltage input, operating temperature is -30-60℃, wireless transmission power is 500mW, and transmission distance is 1-3km.

[0022] The intrinsically safe DC power supply 1-5 is a KDW127 / 24B mining DC regulated power supply, which uses a high-performance integrated circuit to output a stable high-current DC voltage. The power output has overcurrent and short-circuit protection, providing a continuous and stable power supply for the mining multi-parameter fire detector 1-1, the intrinsically safe control motor 1-2, the alarm 1-3 and the remote control module 1-4. The backup battery is a rechargeable battery, which can continue to output voltage for more than 8 hours after disconnection.

[0023] The automatic opening and closing device 1-6 is an automatic opening and closing device of the intrinsically safe airbag storage box 1, which adopts an aluminum alloy hinge, has a size of 12cm×17cm, is located on the right side of the intrinsically safe airbag storage box 1, and is connected to the intrinsically safe control motor 1-2 through a thermoplastic insulated wire. When the intrinsically safe control motor 1-2 is operating, the automatic opening and closing device 1-6 controls the opening and closing of the right side baffle of the intrinsically safe airbag storage box 1 through the hinge.

[0024] Further, the gas generation module 2 includes a gas generator 2-1, an inert gas carbon steel bottle 2-2, and a valve assembly 2-3;

[0025] A negative pressure exhaust hole is provided on the left side of the gas generator 2-1, which is connected to the inert gas carbon steel bottle 2-2 through a hose. The bottom of the gas generator 2-1 is connected to the valve assembly 2-3 through a guide channel, which serves as a supply and pressurizing device for explosion-proof inert gas. The explosion-proof inert gas in the inert gas carbon steel bottle 2-2 is introduced into the guide channel through the negative pressure to ventilate the high-strength flexible airbag 3-1.

[0026] The inert gas carbon steel cylinder 2-2 is a 40L inert gas carbon steel cylinder with a size of 22×140cm, a weight of 56kg, and a filling volume of 13.5MPa / 5.4Nm 3 / 6kg. Provide sufficient and stable inert gas for the gas generator 2-1 and the high-strength flexible airbag 3-1.

[0027] The valve assembly 2-3 is a fluid flow control valve with a complete fluid control mechanism and an explosion-proof metal housing. The working temperature is -40-300°C, the working pressure is 1.6Mpa-10Mpa, and the nominal diameter is DN10-50mm. The valve assembly 2-3 is connected to the gas generator 2-1 and can flexibly control the release and closing of the inert gas.

[0028] Furthermore, the expansion barrier module 3 includes a high-strength flexible airbag 3-1, an intrinsically safe pressure sensor 3-2, a pressure monitoring device 3-3, a magnetic patch 3-4 and a high-pressure flexible hose 3-5;

[0029] The inner layer of the high-strength flexible airbag 3-1 is made of high-strength PVC controlled material, and the outer layer is made of wear-resistant and flame-retardant polymer rubber material. It is a semi-arch expansion structure, weighs 4.5kg, and is 80cm thick after expansion. The operating pressure is 7kPa-10kPa. The high-strength flexible airbag 3-1 is connected to the valve assembly 2-3 through a high-pressure flexible hose 3-5 and is located at the bottom of the box. The diameter and arc length of the high-strength flexible airbag 3-1 can be modified according to the actual range of width and height of the upper corner of the mining surface, and the expansion size is adapted to the size of the applied tunnel.

[0030] The intrinsically safe pressure sensor 3-2 is respectively adsorbed on both sides of the leeward surface of the high-strength flexible airbag 3-1, and is located in the middle of the high-strength flexible airbag 3-1; it is used to record the internal and external pressure difference of the closed airbag in the underground tunnel environment in real time. The GDP35 intrinsically safe pressure sensor is used, which is 12.8cm long and 2.6cm wide, and has the characteristics of high precision and high load resistance. The sensitive element adopts a special process to form a resistor and is connected to a Wheatstone bridge. When a DC power supply is added, a DC voltage signal output will be generated. After the secondary conversion circuit, a two-wire 4-20mA output is realized. The pressure value inside and outside the airbag can be displayed in real time.

[0031] The pressure monitoring device 3-3 is a YHY-60 type intrinsically safe pressure monitor for mining, which stores and monitors the data collected by the intrinsically safe pressure sensor 3-2. The pressure monitoring device 3-3 is provided with a dual Ethernet port connection, which can wirelessly receive the data of the intrinsically safe pressure sensor 3-2, with a measuring range of 0-60MPa and an error of ≤±2.0MPa. The pressure monitoring device 3-3 monitors the pressure difference between the inside and outside of the airbag and the multi-point pressure state of the airbag door frame in real time. When the internal pressure of the high-strength flexible airbag 3-1 reaches the critical value, the pressure monitoring device 3-3 transmits the electrical signal to the gas generator 2-1 through the series circuit, and closes the gas generator 2-1 and the valve assembly 2-3.

[0032] The magnetic patch 3-4 is a double-layer nickel-plated combined with zinc-plated material, with a diameter of 30 mm and a thickness of 5 mm. There are 24 magnetic patches 3-4 in total, 12 of which are symmetrically distributed on the left and right sides of the high-strength flexible airbag 3. Except for the densification at the vertex, the spacing between the magnetic patches 3-4 in the rest of the parts is 40 cm. During the expansion process of the high-strength flexible airbag 3-1, the magnetic patches 3-4 are mutually adsorbed with the fixed patches pre-installed on the tunnel wall to ensure the airtightness of the high-strength flexible airbag 3-1 and the tunnel wall.

[0033] The high-pressure flexible hose 3-5 is made of wear-resistant and flame-retardant polymer rubber material, which is not easy to corrode and is resistant to high temperatures. The maximum ambient temperature is 80°C, the total length is 200cm, and the pipe diameter working pressure is 20MPa. The high-pressure flexible hose 3-5 is folded and compressed between the valve assembly 2-3 and the high-strength flexible airbag 3-1. The upper end is connected to the valve assembly 2-3, and the lower end is connected to the high-strength flexible airbag 3-1. The interface is sealed with a sealing ring. When the intrinsically safe control motor 1-2 is in operation, the explosion-proof inert gas is passed into the high-pressure flexible hose 3-5 through the valve assembly 2-3. After the hose is extended, the high-strength flexible airbag 3-1 expands in the tunnel.

[0034] The beneficial effects of the utility model.

[0035] 1. The utility model takes a remote adaptive closed airbag for disaster tunnels as the core, and uses a mine multi-parameter fire detector with embedded temperature sensor, smoke sensor and methane sensor to pre-sense underground fire sources and gas over-limit sources; at the same time, the identified dangerous factors can be transmitted by the detector through electrical signals to the intrinsically safe control motor and alarm, triggering the gas generation module to achieve early warning of underground safety accidents.

[0036] 2. The utility model can continuously provide explosion-proof inert gas through an inert gas carbon steel cylinder, which is then pressurized by a gas generator, and uses a gas generation module and a valve assembly to control the high-strength flexible airbag to automatically release in a short time. The high-strength flexible airbag is made of wear-resistant and flame-retardant polymer rubber material and can be stored in underground tunnels for a long time. In addition, when a fire or explosion occurs underground, the explosion-proof airbag can be quickly expanded during the operation of the device to close the dangerous fire area in time.

[0037] 3. The utility model monitors and controls the pressure difference between the inside and outside of the airbag and the multi-point pressure state of the airbag door frame through the pressure monitoring device, and dynamically adjusts the expansion degree of the airbag. The magnetic patch attached to its outer surface and the fixed patch pre-installed on the tunnel wall are mutually adsorbed to ensure the airtightness of the high-strength flexible airbag and the tunnel wall.

[0038] In summary, its design is novel, simple and reasonable, and highly practical. It uses multi-parameter fire detectors for mines, combined with human perception, to pre-perceive underground fire sources and gas over-limit sources. Through intrinsically safe control motors, gas generation modules, valve components and other equipment, the automatic and rapid expansion of high-strength flexible airbags is achieved. During the expansion of the high-strength flexible airbag, the pressure monitoring device is used to record and control the pressure difference inside and outside the airbag in real time, while monitoring the multi-point pressure state of the airbag door frame, and dynamically adjusting the degree of expansion of the airbag. The magnetic patch can ensure the airtightness of the high-strength flexible airbag, realize the rapid and safe closure of the underground dangerous fire area, and facilitate promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1The utility model is a schematic diagram of the internal structure of the intrinsically safe airbag storage box.

[0040] Figure 2 It is a schematic diagram of the high-strength flexible airbag of the utility model in the expanded state.

[0041] Figure 3 It is a schematic diagram of the high-strength flexible airbag of the utility model in a contracted state.

[0042] Figure 4 The utility model is a schematic diagram of the structure of a multi-parameter fire detector for mining.

[0043] Figure 5 This is a schematic diagram of the use environment of the utility model.

[0044] Figure 6 It is an operation flow chart of the utility model. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] like Figures 1 to 6 As shown, the utility model is a remote adaptive closed airbag for a disaster tunnel, comprising an intrinsically safe airbag storage box 1, a gas generating module 2, and an expansion barrier module 3;

[0047] The intrinsically safe airbag storage box 1 is used to store the gas generation module 2 and the expansion barrier module 3 to prevent damage to the internal devices in the event of an accident, thereby preventing a secondary accident. The gas generation module 2 is used to store and release inert gas, and is located above the expansion barrier module 3, so that the inert gas can quickly enter the high-strength flexible airbag 3-1 through the pressurization effect. The expansion barrier module 3 is used to block the toxic and harmful gases generated by the explosion, and is connected to the gas generation module 2 and is located below the gas generation module 2.

[0048] The intrinsically safe airbag storage box 1 is internally installed with a multi-parameter fire detector for mining 1-1, which is connected to the intrinsically safe control motor 1-2 and the alarm 1-3 respectively through thermoplastic insulated wires, and is located above the intrinsically safe control motor 1-2 and the alarm 1-3. The detector 1-1 can convert the characteristic physical quantities of the fire, such as temperature, smoke, gas and radiation light intensity, into electrical signals and import them into the intrinsically safe control motor 1-2, and send an alarm signal to the alarm 1-3. The intrinsically safe control motor 1-2 controls the gas generating module 2 using electrical signals. In addition, the remote control module 1-4 provided in the intrinsically safe airbag storage box 1 can be used to sense the danger by humans, and the start signal can be transmitted to the intrinsically safe control motor 1-2. The remote control module 1-4 is connected to the intrinsically safe control motor 1-2 and the alarm 1-3 through thermoplastic insulated wires, and is located below the two. The intrinsically safe airbag storage box 1 is equipped with an intrinsically safe DC power supply 1-5, which is located below the remote control module 1-4 and provides a regulated current to various devices through a series circuit.

[0049] The intrinsically safe airbag storage box 1 includes a multi-parameter fire detector for mining 1-1, an intrinsically safe control motor 1-2, an alarm 1-3, a remote control module 1-4, an intrinsically safe DC power supply 1-5, and an automatic opener and closer 1-6.

[0050] The intrinsically safe airbag storage box 1 has a size of 100 cm in length, 30 cm in width and 150 cm in height. The box body is made of aluminum alloy and has an explosion-proof mark of ExibI, which can effectively protect the equipment in the box during daily production in the lane. The right baffle of the box body can be opened by an automatic opener 1-6, thereby releasing the high-strength flexible airbag 3-1.

[0051] The multi-parameter fire detector 1-1 for mining consists of three independent fire sensors, equipped with multi-level fire characterization signal judgment sensitivity. The shell material is intrinsically safe explosion-proof metal, the working environment temperature is 20℃~100℃, the working environment humidity is 5%~95%, and the working voltage is 24VDC. It includes a mining temperature sensor 1-1-1, a mining smoke sensor 1-1-2, and a methane sensor 1-1-3. The three sensors are located at the same level above the intrinsically safe control motor 1-2 and are connected through parallel circuit wiring.

[0052] The mining temperature sensor 1-1-1 is a GWP200-C temperature sensor, which adopts an intrinsically safe explosion-proof alloy housing, the explosion-proof mark is ExibI, and passive contact temperature measurement. The temperature sensing element is a PT100 platinum thermal resistor, the temperature measurement range is 0-200℃, the allowable error is ±1℃, and it is suitable for mixed places with explosive gases underground.

[0053] The mining smoke sensor 1-1-2 is a GQQ-0.1 mining smoke sensor, which uses a gas-sensitive probe element. When the smoke concentration in the underground tunnel is ≥ 0.1 mg / m 3 When the alarm is on, a low-frequency electrical signal is output to the intrinsically safe control motor 1-2 and the alarm 1-3.

[0054] The mining methane sensor 1-1-3 is an APEG-D type methane sensor, which uses a gas-sensitive probe element, has a measurement accuracy of ≤±1%FS, and a working voltage of 24VDC. When the underground gas concentration exceeds the limit, a low-frequency electrical signal is output to the intrinsically safe control motor 1-2 and the alarm 1-3.

[0055] The intrinsically safe control motor 1-2 is an execution and connection device for the dangerous characteristic signal recognition and gas generation module 2, and is used to transmit the electrical signal of the mining multi-parameter fire detector 1-1. The casing is made of intrinsically safe explosion-proof alloy, and the motor power is less than 750W.

[0056] The alarm 1-3 is a YS-01H mining sound and light alarm, with an alarm decibel of 120 dB, an explosion-proof mark of ExibI, and a working power of 25 W. It transmits an alarm signal to the mining multi-parameter fire detector 1-1.

[0057] The remote control module 1-4 is an industrial-grade remote acquisition and control module, which provides switch input acquisition, relay output, high-frequency counting and other functions of passive nodes; it adopts full digital encrypted wireless transmission, has dual Ethernet ports for connection, is controlled by remote commands, and realizes remote control with the ground PLC wireless communication terminal. 10-30VDC wide voltage input, operating temperature is -30-60℃, wireless transmission power is 500mW, and transmission distance is 1-3km.

[0058] The intrinsically safe DC power supply 1-5 is a KDW127 / 24B mining DC regulated power supply, which uses a high-performance integrated circuit to output a stable high-current DC voltage. The power output has overcurrent and short-circuit protection, providing a continuous and stable power supply for the mining multi-parameter fire detector 1-1, the intrinsically safe control motor 1-2, the alarm 1-3 and the remote control module 1-4. The backup battery is a rechargeable battery, which can continue to output voltage for more than 8 hours after disconnection.

[0059] The automatic opening and closing device 1-6 is an automatic opening and closing device of the intrinsically safe airbag storage box 1, which adopts an aluminum alloy hinge, has a size of 12cm×17cm, is located on the right side of the intrinsically safe airbag storage box 1, and is connected to the intrinsically safe control motor 1-2 through a thermoplastic insulated wire. When the intrinsically safe control motor 1-2 is operating, the automatic opening and closing device 1-6 controls the opening and closing of the right side baffle of the intrinsically safe airbag storage box 1 through the hinge.

[0060] Furthermore, the gas generation module 2 includes a gas generator 2-1, an inert gas carbon steel bottle 2-2, and a valve assembly 2-3.

[0061] The gas generator 2-1 is provided with a negative pressure exhaust hole on the left side, which is connected to the inert gas carbon steel bottle 2-2 through a hose, and the bottom of the gas generator 2-1 is connected to the valve assembly 2-3 through a guide channel. As a supply and pressurization device for explosion-proof inert gas, the explosion-proof inert gas in the inert gas carbon steel bottle 2-2 is introduced into the guide channel through the negative pressure to ventilate the high-strength flexible airbag 3-1.

[0062] The inert gas carbon steel cylinder 2-2 is a 40L inert gas carbon steel cylinder with a size of 22×140cm, a weight of 56kg, and a filling volume of 13.5MPa / 5.4Nm 3 / 6kg. Provide sufficient and stable inert gas for the gas generator 2-1 and the high-strength flexible airbag 3-1.

[0063] The valve assembly 2-3 is a fluid flow control valve with a complete fluid control mechanism and an explosion-proof metal housing. The working temperature is -40-300°C, the working pressure is 1.6Mpa-10Mpa, and the nominal diameter is DN10-50mm. The valve assembly 2-3 is connected to the gas generator 2-1 and can flexibly control the release and closing of the inert gas.

[0064] Furthermore, the expansion barrier module 3 includes a high-strength flexible airbag 3-1, an intrinsically safe pressure sensor 3-2, a pressure monitoring device 3-3, a magnetic patch 3-4 and a high-pressure flexible hose 3-5.

[0065] The inner layer of the high-strength flexible airbag 3-1 is made of high-strength PVC controlled material, and the outer layer is made of wear-resistant and flame-retardant polymer rubber material. It is a semi-arch expansion structure, weighs 4.5kg, has a thickness of 80cm after expansion, and has an operating pressure of 7kPa-10kPa. The high-strength flexible airbag 3-1 is connected to the valve assembly 2-3 through a high-pressure flexible hose 3-5, which is located at the bottom of the box. The diameter and arc length of the airbag can be modified according to the actual range of width and height of the upper corner of the mining surface, and the expansion size is adapted to the size of the applied tunnel.

[0066] The intrinsically safe pressure sensor 3-2 is respectively adsorbed on both sides of the leeward surface of the high-strength flexible airbag 3-1, and is located in the middle of the high-strength flexible airbag 3-1. It is used to record the internal and external pressure difference of the closed airbag in the underground tunnel environment in real time. The GDP35 intrinsically safe pressure sensor is used, which is 12.8cm long and 2.6cm wide, and has the characteristics of high precision and high load resistance. The sensitive element adopts a special process to form a resistor and is connected to form a Wheatstone bridge. When a DC power supply is added, a DC voltage signal output will be generated. After the secondary conversion circuit, a two-wire 4-20mA output is realized. The pressure value inside and outside the airbag can be displayed in real time.

[0067] The pressure monitoring device 3-3 is a YHY-60 type intrinsically safe pressure monitor for mining, which stores and monitors the data collected by the intrinsically safe pressure sensor 3-2. The pressure monitoring device 3-3 is equipped with a dual Ethernet port connection, which can wirelessly receive data from the intrinsically safe pressure sensor 3-2, with a range of 0-60MPa and an error of ≤±2.0MPa. The pressure monitoring device 3-3 monitors the pressure difference between the inside and outside of the airbag and the multi-point pressure state of the airbag door frame in real time. When the internal pressure of the high-strength flexible airbag 3-1 reaches the critical value, the pressure monitoring device 3-3 transmits the electrical signal to the gas generator 2-1 through a series circuit, and closes the gas generator 2-1 and the valve assembly 2-3.

[0068] The magnetic patch 3-4 is a double-layer nickel-plated combined with zinc-plated material, with a diameter of 30 mm and a thickness of 5 mm. There are 24 magnetic patches 3-4 in total, 12 of which are symmetrically distributed on the left and right sides of the high-strength flexible airbag 3. Except for the densification at the vertex, the spacing between the magnetic patches 3-4 in the rest of the parts is 40 cm. During the expansion process of the high-strength flexible airbag 3-1, the magnetic patches 3-4 are mutually adsorbed with the fixed patches pre-installed on the tunnel wall to ensure the airtightness of the high-strength flexible airbag 3-1 and the tunnel wall.

[0069] The high-pressure flexible hose 3-5 is made of wear-resistant and flame-retardant polymer rubber material, which is not easy to corrode and is resistant to high temperatures. The maximum ambient temperature is 80°C, the total length is 200cm, and the pipe diameter working pressure is 20MPa. The high-pressure flexible hose 3-5 is folded and compressed between the valve assembly 2-3 and the high-strength flexible airbag 3-1. The upper end is connected to the valve assembly 2-3, and the lower end is connected to the high-strength flexible airbag 3-1. The interface is sealed with a sealing ring. When the intrinsically safe control motor 1-2 is in operation, the explosion-proof inert gas is passed into the high-pressure flexible hose 3-5 through the valve assembly 2-3. After the hose is extended, the high-strength flexible airbag 3-1 expands in the tunnel.

[0070] In this example, the intrinsically safe airbag storage box 1 is made of aluminum alloy and has an explosion-proof mark of ExibI, which can effectively protect the equipment in the box during daily production in the tunnel.

[0071] In this example, the mining temperature sensor 1-1-1 is a GWP200-C temperature sensor, which adopts an intrinsically safe explosion-proof alloy housing and has an explosion-proof mark of Exib I. The temperature sensing element is a PT100 platinum thermal resistor, with a temperature measurement range of 0-200°C and an allowable error of ±1°C, and is suitable for mixed places with explosive gases underground.

[0072] In this example, the mining smoke sensor 1-1-2 is a GQQ-0.1 mining smoke sensor, which uses a gas-sensitive probe element.

[0073] In this example, the mining methane sensor 1-1-3 is an APEG-D type methane sensor, which uses a gas-sensitive probe element, has a measurement accuracy of ≤±1% FS, and an operating voltage of 24VDC.

[0074] In this example, the alarm 1-3 is a YS-01H mining sound and light alarm with an alarm decibel of 120dB, an explosion-proof mark of ExibI, and a working power of 25W.

[0075] In this example, the intrinsically safe DC power supply 1-5 is a KDW127 / 24B mining DC regulated power supply, which uses a high-performance integrated circuit to output a stable high-current DC voltage.

[0076] In this example, the intrinsically safe pressure sensor 3-2 adopts the GDP35 intrinsically safe pressure sensor, which has the characteristics of high precision and high load resistance.

[0077] In this example, the pressure monitoring device 3-3 is a YHY-60 type intrinsically safe pressure monitor for mining, with a measuring range of 0-60MPa and an error of ≤±2.0MPa.

[0078] In this example, the high-pressure flexible hose 3-5 is made of wear-resistant and flame-retardant polymer rubber material, which is not easy to corrode and is resistant to high temperatures. The maximum ambient temperature is 80°C and the working pressure is 20MPa.

[0079] When the utility model is used, it mainly includes the following steps:

[0080] Step 1: Early identification of underground fire sources or excessive gas sources through the embedded temperature sensor 1-1-1, smoke sensor 1-1-2 and methane sensor 1-1-3 of the mine multi-parameter fire detector 1-1.

[0081] Step 2: The mine multi-parameter fire detector 1-1 transmits the identified dangerous factors to the intrinsically safe control motor 1-2 and the alarm 1-3 through electrical signals, and uses the intrinsically safe control motor 1-2 to start the gas generator 2-1; the dangerous factors can also be sensed early by humans, and the gas generator 2-1 can be started using the remote control module 1-4.

[0082] Step 3: The gas generator 2-1 pressurizes the explosion-proof inert gas in the inert gas carbon steel cylinder 2-2, introduces the explosion-proof inert gas in the inert gas carbon steel cylinder 2-2 into the diversion channel, and uses the valve assembly 2-3 to control the release and closing of the explosion-proof inert gas.

[0083] Step 4: The high-strength flexible airbag 3-1 is controlled by the gas generator 2-1 and the valve assembly 2-3. After the valve assembly 2-3 is opened, the high-strength flexible airbag 3-1 begins to inflate through the high-pressure flexible hose 3-5. The inert gas inside the airbag is always stable during the expansion process. The intrinsically safe pressure sensor 3-2 is installed inside and outside the airbag to measure the pressure difference inside and outside the airbag during the expansion process. The pressure monitoring device 3-3 monitors the multi-point pressure state of the airbag door frame in real time. When the internal pressure is less than the critical pressure, the pressure monitoring device 3-3 transmits the signal to the gas generator 2-1 and the valve assembly 2-3, keeps it open, and continuously supplies gas to the high-strength flexible airbag 3-1. When the internal pressure of the airbag reaches the critical pressure, the pressure monitoring device 3-3 transmits an electrical signal to the gas generator 2-1, closes the gas generator 2-1 and the valve assembly 2-3, and stops the gas supply.

[0084] Step 5: During the expansion process of the high-strength flexible airbag 3-1, the magnetic patch 3-4 attached to its outer surface and the fixed patch pre-installed on the tunnel wall are mutually adsorbed to ensure the airtightness between the high-strength flexible airbag 3-1 and the tunnel wall.

[0085] Furthermore, the step 1 is implemented by the following specific steps:

[0086] Clarify the critical temperature, smoke concentration and gas concentration of underground tunnel fire, and preset the temperature sensor warning value range to be 40-60℃; the smoke concentration is 5%OBS / M-15%OBS / M; and the gas concentration is 5%~16%.

[0087] Furthermore, the step 4 is implemented by the following specific steps:

[0088] The critical pressure value of the high-strength flexible airbag 3-1 is clarified, and the critical pressure value of the intrinsically safe pressure sensor 3-2 is preset to 1.961kPa-2.492kPa.

Claims

1. A remote adaptive airbag for disaster tunnel, characterized in that: It comprises an intrinsically safe airbag storage box (1), a gas generating module (2), and an expansion barrier module (3); The intrinsically safe airbag storage box (1) is used to store the gas generation module (2) and the expansion barrier module (3); The gas generation module (2) is used to store and release the inert gas and is located above the expansion barrier module (3), so that the inert gas can quickly enter the high-strength flexible airbag (3-1) through the pressurization effect; The expansion barrier module (3) is used to block toxic and harmful gases generated by the explosion, is connected to the gas generation module (2), and is located below the gas generation module (2).

2. The disaster tunnel remote adaptive sealing airbag according to claim 1, characterized in that: The intrinsically safe airbag storage box (1) comprises a multi-parameter fire detector for mining (1-1), an intrinsically safe control motor (1-2), an alarm (1-3), a remote control module (1-4), an intrinsically safe direct current power supply (1-5), and an automatic opener and closeer (1-6); A multi-parameter fire detector for mining (1-1) is installed inside the intrinsically safe airbag storage box (1). The multi-parameter fire detector for mining (1-1) is connected to an intrinsically safe control motor 1-2 and an alarm (1-3) respectively through thermoplastic insulated wires and is located above the intrinsically safe control motor (1-2) and the alarm (1-3). The detector (1-1) can convert characteristic physical quantities of fire into electrical signals and introduce them into the intrinsically safe control motor (1-2), and send an alarm signal to the alarm (1-3). The intrinsically safe control motor (1-2) uses the electrical signals to control the gas generation module (2).

3. The disaster tunnel remote adaptive sealing airbag according to claim 2, characterized in that: A remote control module (1-4) is arranged inside the intrinsically safe airbag storage box (1). Through artificial perception of danger, the remote control module (1-4) is used to transmit a start signal to the intrinsically safe control motor (1-2). The remote control module (1-4) is connected to the intrinsically safe control motor (1-2) and the alarm (1-3) through a thermoplastic insulated wire and is located below the two. The intrinsically safe airbag storage box (1) is equipped with an intrinsically safe DC power supply (1-5), which is located below the remote control module (1-4) and provides a regulated current for various devices through a series circuit.

4. The remote adaptive airbag for disaster tunnel according to claim 2 is characterized in that: A baffle is arranged on the side of the intrinsically safe airbag storage box (1), and an automatic opener and closer (1-6) is arranged outside the baffle. The automatic opener and closer (1-6) is used to release the high-strength flexible airbag (3-1).

5. The remote adaptive sealing airbag for disaster tunnel according to claim 2, characterized in that: The multi-parameter fire detector (1-1) for mining is composed of three independent fire sensors; The multi-parameter fire detector for mining (1-1) comprises a mining temperature sensor (1-1-1), a mining smoke sensor (1-1-2), and a methane sensor (1-1-3). The mining temperature sensor (1-1-1), the mining smoke sensor (1-1-2), and the methane sensor (1-1-3) are located at the same level above the intrinsically safe control motor (1-2) and are connected via parallel circuit wiring.

6. The remote adaptive airbag for disaster tunnel according to claim 2 is characterized in that: The automatic opener and closer (1-6) is an automatic opening and closing device for the intrinsically safe airbag storage box (1). The automatic opener and closer (1-6) controls the opening and closing of the right baffle of the intrinsically safe airbag storage box (1) through a hinge.

7. The remote adaptive sealing airbag for disaster tunnel according to claim 1, characterized in that: The gas generation module (2) comprises a gas generator (2-1), an inert gas carbon steel bottle (2-2), and a valve assembly (2-3); The gas generator (2-1) is provided with a negative pressure exhaust hole on the left side, which is connected to the inert gas carbon steel bottle (2-2) through a rubber hose. The bottom of the gas generator (2-1) is connected to the valve assembly (2-3) through a guide channel, which serves as a supply and pressurizing device for explosion-proof inert gas. The explosion-proof inert gas in the inert gas carbon steel bottle (2-2) is introduced into the guide channel through the negative pressure effect, and ventilates the high-strength flexible airbag (3-1).

8. The disaster tunnel remote adaptive sealing airbag according to claim 1, characterized in that: The expansion barrier module (3) comprises a high-strength flexible airbag (3-1), an intrinsically safe pressure sensor (3-2), a pressure monitoring device (3-3), a magnetic patch (3-4) and a high-pressure flexible hose (3-5); The inner layer of the high-strength flexible airbag (3-1) is made of high-strength PVC controlled material, has a semi-arch expansion structure, weighs 4.5 kg, and has a thickness of 80 cm after expansion. The high-strength flexible airbag (3-1) is connected to the valve assembly (2-3) through a high-pressure flexible hose (3-5) and is located at the bottom of the box; The intrinsically safe pressure sensor (3-2) is respectively adsorbed on the inner and outer sides of the leeward surface of the high-strength flexible airbag (3-1), and is located in the middle of the high-strength flexible airbag (3-1); The magnetic patch (3-4) is a double-layer nickel-plated combined with zinc-plated material. There are 24 magnetic patches (3-4) in total, 12 of which are symmetrically distributed on the left and right sides of the high-strength flexible airbag (3-1). During the expansion process of the high-strength flexible airbag (3-1), the magnetic patches (3-4) are mutually adsorbed with the fixed patches pre-installed on the tunnel wall, thereby ensuring the airtightness between the high-strength flexible airbag (3-1) and the tunnel wall. The high-pressure flexible rubber hose (3-5) is folded and compressed between the valve assembly (2-3) and the high-strength flexible airbag (3-1), with the upper end connected to the valve assembly (2-3) and the lower end connected to the high-strength flexible airbag (3-1), and the interface is sealed with a sealing ring.

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