Mining dangerous area approaching alarm device

Abstract

The application discloses a mining dangerous area approaching alarm device, and relates to the technical field of mining alarm devices, the mining dangerous area approaching alarm device comprises a mining intrinsic safety type optical fiber camera, a line interface is fixed on the mining intrinsic safety type optical fiber camera, and the line interface is in coupling connection with a transmission line; the device further comprises a protection assembly. The protection assembly comprises an air source device, a ventilation pipe and a sealing bin. The sealing bin is a hollow rectangular body and is fixed on the mining intrinsic safety type optical fiber camera, and the line interface is located in the sealing bin; a through hole is formed in the position, away from the mining intrinsic safety type optical fiber camera, of the sealing bin, one end of the transmission line penetrates through the through hole and extends out of the sealing bin, and the transmission line is connected with the through hole in a sealed mode. An infrared thermometer is fixed on the inner side of the sealing bin; sparks can be inhibited in advance before the sparks occur, high-concentration nitrogen is injected into the sealing bin, heat generated at the joint is absorbed, and the use safety of equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mine alarm devices, in particular to a mine danger zone alarm device. Background Art

[0002] The mine-use danger zone alarm device is mainly used in key danger areas such as underground coal mine excavation working faces, coal bunkers, closed walls, and belt conveyors. The mine-use danger zone alarm device mainly consists of a host, a mine-use intrinsically safe fiber optic camera, a power-off controller, an audible and visual touch sensor, and an audible and visual alarm. The mine-use intrinsically safe fiber optic camera monitors the working environment in real time. When someone breaks in, the host controls the audible and visual touch sensor to issue a safety warning or stop the equipment from operating, thus avoiding safety accidents.

[0003] In addition, the line connectors of intrinsically safe fiber optic cameras for mining are usually exposed to the working environment of the mine. The contact area at the connectors is usually small, resulting in large contact resistance, which can easily cause local heating and burning. The environment in the mine is humid, dusty, and high in temperature, which reduces the insulation performance of the line connectors and increases the risk of short circuits. Sparks will appear during a short circuit, and the sparks generated can easily cause a fire when they come into contact with the coal dust in the mine. The environment underground in the mine is complex, and if the fire cannot be controlled in time, it may cause a gas explosion or harmful gas poisoning, seriously affecting the safety of equipment use. Summary of the Invention

[0004] The embodiments of the present application provide a mine-use danger zone alarm device, thereby solving the problem in the prior art of high risk of short circuit at line joints, sparks occurring during short circuits, and fires that are very likely to occur.

[0005] The embodiment of the present application provides a mine-use danger zone alarm device, comprising a mine-use intrinsically safe optical fiber camera, the mine-use intrinsically safe optical fiber camera being fixed with a line interface, the line interface being coupled to a transmission line;

[0006] Also includes protection components;

[0007] The protective assembly includes an air source device, a vent pipe and a sealing chamber;

[0008] The sealed chamber is a hollow rectangular body and is fixed on the intrinsically safe optical fiber camera for mining, and the line interface is located inside the sealed chamber;

[0009] A through hole is opened on the sealed chamber away from the mine intrinsically safe optical fiber camera, one end of the transmission line passes through the through hole and extends out of the sealed chamber, and the transmission line and the through hole are sealed and connected;

[0010] An infrared thermometer is fixed inside the sealed chamber, and the infrared thermometer is used to monitor the temperature of the transmission line and the line interface joint;

[0011] The ventilation pipe is fixed on the sealed chamber, one end of the ventilation pipe extends into the sealed chamber, and the other end of the ventilation pipe is connected to the air source device;

[0012] An air pump is fixed on the vent pipe, and the gas in the air source device is sent into the vent pipe through the air pump. The air source device is a nitrogen bottle and is used to provide nitrogen to the sealed chamber.

[0013] Furthermore, the protection assembly further includes a telescopic portion and a supporting portion;

[0014] The line interface is a cylindrical joint, the telescopic portion is an annular rubber bag and is fixed in the sealed compartment near the line interface, and the telescopic portion is located outside the line interface, and the axis of the telescopic portion coincides with the axis of the line interface;

[0015] An air supply pipe is fixed on the vent pipe, the free end of the air supply pipe passes through the sealing chamber and extends into the telescopic part, and an opening and closing valve is fixed on the air supply pipe;

[0016] The support part is connected to the transmission line, and air is introduced into the telescopic part through the air supply pipe, so that the telescopic part expands and pushes the support part to move, so that the transmission line is separated from the line interface.

[0017] Furthermore, the support portion includes a bracket;

[0018] There are two brackets, the two brackets are parallel, and one end of the two brackets close to the line interface is connected to the telescopic part, and a positioning plate is fixed between the two brackets at one end away from the line interface;

[0019] A through slot is provided in the middle of the positioning plate, and the transmission line passes through the through slot and is fixed to the positioning plate;

[0020] A glass fiber cloth is fixed to the outside of the telescopic part, and the glass fiber cloth can expand and contract along with the expansion and contraction of the telescopic part.

[0021] Furthermore, a second annular retaining plate is fixed on the two brackets near the bottom of the telescopic portion;

[0022] A ring-shaped retaining plate 1 is fixed on the telescopic portion near the bracket, and the retaining plate 1 is fixedly connected to the retaining plate 2;

[0023] The positioning plate is fixed with two positioning blocks away from the retaining plate, and a positioning seat is fixed in the sealing chamber near the positioning blocks;

[0024] The cross section of the positioning seat is concave, and the positioning block extends into the positioning seat;

[0025] When the bracket moves, the positioning block can be embedded in the positioning seat.

[0026] Furthermore, the bracket is a hollow box body and contains a flame retardant inside, which is used to suppress the burning of sparks;

[0027] A plurality of nozzles are fixed on one side of the bracket close to the transmission line, and the nozzles are used to spray flame retardant to the transmission line;

[0028] The two brackets are connected via a branch pipe, and the free end of the branch pipe is connected to the air pump via a pipeline.

[0029] Furthermore, an air guide tube is fixed on the ventilation tube, the free end of the air guide tube extends into the sealed chamber, and the free end of the branch tube is connected to the extending end of the air guide tube;

[0030] A one-way valve is fixed on the airway tube, and the one-way valve is used to prevent the flame retardant from flowing back. The flame retardant in the bracket is perfluoroacetone flame retardant.

[0031] Furthermore, a liquid storage box is fixed outside the sealed chamber, the liquid storage box contains flame retardant, the liquid storage box is connected to a liquid injection pipe, a liquid pump is fixed on the liquid injection pipe, and a plurality of diversion pipes are fixed on the water outlet end of the liquid injection pipe;

[0032] The free end of one of the shunt tubes passes through the sealing chamber and extends into the bracket, and the shunt tube and the bracket are sealed and connected.

[0033] Furthermore, an annular outer tube is sleeved on the outer side of the transmission line, the axis of the outer tube coincides with the axis of the transmission line, and a gap is left between the outer tube and the transmission line;

[0034] A plurality of micropores are evenly spaced apart on the side surface of the outer cylinder outside the sealing chamber.

[0035] Furthermore, it also includes a host, a start / stop sensor, a power supply and an acoustic and optical touch sensor. The mine intrinsically safe optical fiber camera is electrically connected to the host through a circuit. The acoustic and optical touch sensor is used to sense people and other heat sources approaching the dangerous area.

[0036] The acoustic and optical touch sensor is electrically connected to a host computer through a circuit. The host computer collects monitoring information of the mine intrinsically safe optical fiber camera and the acoustic and optical touch sensor and analyzes the information.

[0037] Furthermore, it also includes an audible and visual alarm, a power-off controller and a personnel identification card;

[0038] The sound and light alarm is electrically connected to the host through a circuit, and the sound and light alarm is used to send out an alarm signal and perform voice broadcasting. The power-off controller is electrically connected to the host through a circuit, and the power-off controller is used to cut off the power supply to the device;

[0039] The personnel identification card is electrically connected to the host through a circuit, and the personnel identification card is used to identify the identity of a person.

[0040] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0041] By setting up a protective component and filling the sealed chamber with nitrogen, the occurrence of sparks can be suppressed in advance before they occur. By injecting high-concentration nitrogen into the sealed chamber, the oxygen content in the sealed chamber is reduced, the heat generated at the joint is absorbed, and the sparks are extinguished more quickly when they occur, effectively suffocating the flames and improving the safety of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a side perspective structural diagram of the mine danger zone alarm device of the present invention;

[0043] Figure 2 This is a rear perspective structural diagram of the mine danger zone alarm device of the present invention;

[0044] Figure 3 This is a structural diagram of the connection relationship between the line interface and the transmission line of the mine adjacent danger zone alarm device of the present invention;

[0045] Figure 4 This is a schematic diagram of the cross-sectional three-dimensional structure of the sealed chamber of the mine danger zone alarm device of the present invention;

[0046] Figure 5 This is a structural diagram of the positional relationship between the infrared thermometer and the sealed chamber of the mine danger zone alarm device of the present invention;

[0047] Figure 6 This is a structural diagram of the connection relationship between the air guide pipe and the branch pipe of the mine danger zone alarm device of the present invention;

[0048] Figure 7 This is a structural diagram of the positional relationship between the positioning seat and the positioning block of the mine danger zone alarm device of the present invention;

[0049] Figure 8 This is a schematic diagram of the structure of the mine danger zone alarm device of the present invention, in which the telescopic part drives the bracket to move;

[0050] Figure 9 This is a structural diagram of the connection relationship between the injection pipe and the shunt pipe of the mine danger zone alarm device of the present invention;

[0051] Figure 10 The invention is a mine-use danger zone alarm device Figure 9 A schematic diagram of the partially enlarged structure at center A;

[0052] Figure 11 This is a schematic diagram of the structure of the mine danger zone alarm device in which the line interface and the transmission line are separated;

[0053] Figure 12This is a schematic diagram of the cross-sectional structure of the transmission line of the mine danger zone alarm device of the present invention;

[0054] Figure 13 This is a schematic diagram of the system connection structure of the mine adjacent danger zone alarm device of the present invention.

[0055] In the figure: 100, mine-use intrinsically safe fiber optic camera; 110, line interface; 120, transmission line; 121, outer tube;

[0056] 200, protective assembly; 210, air source device; 220, ventilation pipe; 221, air supply pipe; 222, air guide pipe; 2221, branch pipe; 230, sealing chamber; 231, infrared thermometer; 232, positioning seat;

[0057] 240, telescopic portion; 241, retaining plate 1;

[0058] 250, support portion; 251, bracket; 2511, nozzle; 2512, retaining plate 2; 252, positioning plate; 2521, positioning block;

[0059] 260. Liquid injection tube; 261. Diversion tube; 270. Liquid storage box. DETAILED DESCRIPTION

[0060] To facilitate understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0061] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are for illustrative purposes only and do not represent the only implementation method.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0063] like Figures 1 to 5As shown, the present application proposes a mine-use danger zone alarm device, including a mine-use intrinsically safe fiber optic camera 100, which is installed in a mine. The mine-use intrinsically safe fiber optic camera 100 is used to monitor the dangerous area in the mine in real time and promptly warn people entering the dangerous area. The mine-use intrinsically safe fiber optic camera 100 is fixed with a line interface 110, which is coupled to a transmission line 120, and the transmission line 120 is detachably connected to the line interface 110;

[0064] Also included is a protection assembly 200;

[0065] The protection assembly 200 includes an air source device 210, a vent pipe 220 and a sealing chamber 230;

[0066] The sealed chamber 230 is a rectangular body with a hollow interior and is fixed to the intrinsically safe optical fiber camera 100 for mining. The line interface 110 is located in the sealed chamber 230. The sealed chamber 230 is used to isolate impurities such as coal powder and dust in the mine, reduce oxides at the joint between the line interface 110 and the transmission line 120, and thus reduce damage to the joint between the line interface 110 and the transmission line 120 caused by these impurities.

[0067] A through hole is formed on the sealed chamber 230 away from the intrinsically safe optical fiber camera 100. One end of the transmission line 120 extends out of the sealed chamber 230 through the through hole. The transmission line 120 is sealedly connected to the through hole. In other words, impurities such as coal powder and dust are not easy to enter the sealed chamber 230.

[0068] An infrared thermometer 231 is fixed inside the sealed chamber 230, and the infrared thermometer 231 is used to monitor the temperature at the joint of the transmission line 120 and the line interface 110;

[0069] The vent pipe 220 is fixed on the sealed chamber 230, one end of the vent pipe 220 extends into the sealed chamber 230, and the other end of the vent pipe 220 is connected to the air source device 210;

[0070] An air pump is fixed on the ventilation pipe 220, and the gas in the gas source device 210 is sent into the ventilation pipe 220 through the air pump. The gas source device 210 is a nitrogen cylinder and is used to provide nitrogen to the sealed chamber 230. The nitrogen concentration is not less than 97%. A placement cabinet is installed under the mine, and the gas source device 210 is fixed in the placement cabinet, which does not affect the gas supply to the sealed chamber 230.

[0071] It should be noted that the end of the transmission line 120 close to the line interface 110 is the line joint. When the temperature at the joint reaches above 70°C, a short circuit is very likely to occur and cause sparks. The joint is monitored by an infrared thermometer 231. When the temperature approaches 70°C, nitrogen is pre-filled into the sealed chamber 230 to suppress the occurrence of sparks before they occur.

[0072] Specifically, if Figures 3 to 5 As shown, the protection assembly 200 further includes a telescopic portion 240 and a supporting portion 250;

[0073] The line interface 110 is a cylindrical joint, and the telescopic portion 240 is an annular rubber bladder fixed in the sealed chamber 230 near the line interface 110. The telescopic portion 240 is located outside the line interface 110, and the axis of the telescopic portion 240 coincides with the axis of the line interface 110. The telescopic portion 240 and the line interface 110 are not connected to each other.

[0074] An air supply pipe 221 is fixed to the vent pipe 220. The free end of the air supply pipe 221 passes through the sealed chamber 230 and extends into the telescopic portion 240. The air supply pipe 221 and the sealed chamber 230 are sealed and connected. The connection between the air supply pipe 221 and the telescopic portion 240 is airtight and fixed. The air supply pipe 221 is a hose and can adapt to the expansion and contraction of the telescopic portion 240. An opening and closing valve is fixed to the air supply pipe 221. The opening and closing valve is used to control the air intake in the air supply pipe 221.

[0075] The support portion 250 is connected to the transmission line 120 , and air is introduced into the telescopic portion 240 through the air supply pipe 221 , so that the telescopic portion 240 expands and pushes the support portion 250 to move, so that the transmission line 120 is separated from the line interface 110 .

[0076] It is worth noting that when the temperature at the joint is too high and sparks occur, timely cutting off the connection between the transmission line 120 and the line interface 110 can reduce the fire. The telescopic part 240 is quickly inflated, causing the telescopic part 240 to expand rapidly along its axial direction, thereby pulling the transmission line 120 out of the line interface 110 and reducing losses.

[0077] Specifically, if Figures 3 to 5 As shown, the support portion 250 includes a bracket 251;

[0078] There are two brackets 251, the two brackets 251 are parallel, and one end of the two brackets 251 close to the line interface 110 is connected to the telescopic part 240, and a positioning plate 252 is fixed between the two brackets 251 at one end away from the line interface 110;

[0079] The positioning plate 252 has a through slot in the middle, and the transmission line 120 passes through the through slot and is fixed to the positioning plate 252. That is, when the bracket 251 moves, it can drive the transmission line 120 to separate from the line interface 110.

[0080] A glass fiber cloth is fixed to the outside of the telescopic portion 240 , and the glass fiber cloth can expand and contract along with the expansion and contraction of the telescopic portion 240 .

[0081] It should be noted that the glass fiber cloth can withstand temperatures up to 550° C. without burning. At the same time, the glass fiber cloth has high tensile strength and can expand and contract along with the expansion and contraction of the telescopic portion 240 .

[0082] Specifically, if Figures 3 to 6 As shown, a second annular retaining plate 2512 is fixed on the two brackets 251 near the bottom of the telescopic portion 240;

[0083] A ring-shaped retaining plate 1 241 is fixed to the telescopic portion 240 near the bracket 251. The retaining plate 1 241 is fixedly connected to the retaining plate 2 2512 to increase the contact force and better separate the transmission line 120 from the line interface 110.

[0084] A positioning block 2521 is fixed on the positioning plate 252 away from the second retaining plate 2512 , and a positioning seat 232 is fixed in the sealing chamber 230 near the positioning block 2521 ;

[0085] The cross section of the positioning seat 232 is concave, and the positioning block 2521 extends into the positioning seat 232;

[0086] When the bracket 251 moves, the positioning block 2521 can be locked in the positioning seat 232 .

[0087] It is easy to understand that when the transmission line 120 is separated from the line interface 110, as the positioning plate 252 moves, the positioning block 2521 is embedded in the positioning seat 232 by friction, providing support for the detached transmission line 120 and preventing it from falling. When no spark occurs after the transmission line 120 is separated, and the temperature of the transmission line 120 is reduced after the sealing chamber 230 is filled with nitrogen, the transmission line 120 is not damaged at this time. After the nitrogen filling is completed, the air pump is used to evacuate the air in the ventilation pipe 220, and the air supply pipe 221 is used to evacuate the air in the telescopic part 240, so that the telescopic part 240 contracts and pulls the bracket 251 to move, so that the positioning block 2521 is separated from the positioning seat 232, and the transmission line 120 is re-inserted into the line interface 110 for quick maintenance of the line.

[0088] In the above embodiment, the joint is monitored by the infrared thermometer 231. When the temperature at the joint is detected to be close to 70°C, the nitrogen in the air source device 210 is delivered to the vent pipe 220 by the air pump to pre-fill the sealed chamber 230 with nitrogen. This can suppress the occurrence of sparks before they occur. By injecting high-concentration nitrogen into the sealed chamber 230, the oxygen content in the sealed chamber 230 is reduced, thereby absorbing the heat generated at the joint.

[0089] When sparks appear near the joint of the transmission line 120, the on-off valve on the air supply pipe 221 is opened to allow gas to enter the telescopic part 240. As the gas continues to enter, the telescopic part 240 expands and drives the bracket 251 to move outward quickly, separating the transmission line 120 and the line interface 110, and the positioning block 2521 is embedded in the positioning seat 232 to fix the bracket 251 in place. Then, the on-off valve on the air supply pipe 221 is closed to stop the air intake. This can achieve the rapid separation of the transmission line 120 and the line interface 110 when sparks occur, avoiding a larger fire, reducing the damage to the equipment, making it easier to extinguish the flames, prevent re-ignition, and improve the safety of the equipment.

[0090] In some embodiments of the present application, Figures 3 to 8 As shown, the bracket 251 is a hollow box body and contains a flame retardant therein, which is used to suppress the burning of sparks;

[0091] A plurality of nozzles 2511 are fixed on one side of the bracket 251 close to the transmission line 120 , and the nozzles 2511 are used to spray flame retardant to the transmission line 120 ;

[0092] The two brackets 251 are connected by a branch pipe 2221. The branch pipe 2221 is a hose and can adapt to the movement of the bracket 251. The free end of the branch pipe 2221 is connected to the air pump through a pipeline. The air pump is fixed outside the sealed chamber 230. The air pump is added to the bracket 251 through the branch pipe 2221 to spray the flame retardant from the nozzle 2511.

[0093] It should be noted that when a flame appears at the transmission line 120, nitrogen is filled into the sealed chamber 230 while flame retardant is sprayed out through the nozzle 2511 to extinguish the flame, which can suppress the flame more quickly and efficiently, achieving a flame retardant effect while extinguishing the fire.

[0094] Specifically, if Figures 3 to 8 As shown, an air guide tube 222 is fixed to the vent tube 220, and the free end of the air guide tube 222 extends into the sealed chamber 230. The air guide tube 222 and the sealed chamber 230 are sealed and connected. The free end of the branch tube 2221 is connected to the inserted end of the air guide tube 222, that is, the branch tube 2221 and the air guide tube 222 are connected.

[0095] A one-way valve is fixed on the air guide pipe 222, which is used to prevent the flame retardant from flowing back. When the telescopic part 240 is evacuated, the flame retardant in the bracket 251 does not flow. The flame retardant in the bracket 251 is perfluoroacetone flame retardant, which can be used in combination with nitrogen to achieve better fire extinguishing effect.

[0096] It is worth noting that when the air pump delivers air into the vent pipe 220, the telescopic portion 240 expands and drives the transmission line 120 to separate from the line interface 110. At the same time, nitrogen enters the bracket 251, causing the nozzle 2511 to spray out a perfluoroacetone flame retardant containing nitrogen. The perfluoroacetone flame retardant and nitrogen can be used together to better suppress flames and cover the surface of the transmission line 120 with a flame retardant protective layer to isolate the air from the fire source. At the same time, the sprayed flame retardant can cool the line interface (110) and retard it after falling, further preventing the spread of fire.

[0097] Specifically, if Figures 8 to 10 As shown, a liquid storage box 270 is fixed to the outside of the sealed chamber 230, and a flame retardant is stored in the liquid storage box 270. The liquid storage box 270 is connected to a liquid injection pipe 260, and a liquid pump is fixed on the liquid injection pipe 260. The liquid pump is used to send the flame retardant in the liquid storage box 270 into the diversion pipe 261. A plurality of diversion pipes 261 are fixed on the water outlet end of the liquid injection pipe 260. The diversion pipes 261 are hoses and can adapt to the movement of the bracket 251.

[0098] The free end of one of the shunt tubes 261 passes through the sealing chamber 230 and extends into the bracket 251 , and the shunt tube 261 and the bracket 251 are sealed and connected.

[0099] It is easy to understand that the liquid storage box 270 can replenish the flame retardant in the bracket 251 in time, and the flame retardant in the liquid storage box 270 is sent into the diversion pipe 261 through the liquid pump, and the flame retardant in the bracket 251 is replenished in time through the diversion pipe 261 to improve the fire extinguishing effect.

[0100] On the basis of the above embodiment, when a flame appears at the joint, the one-way valve on the air guide pipe 222 is opened. As the air is ventilated in the air guide pipe 220, nitrogen can enter the branch pipe 2221 from the air guide pipe 222, and enter the bracket 251 through the branch pipe 2221, thereby pressurizing the flame retardant in the bracket 251, and causing the nozzle 2511 to spray a mist flame retardant containing nitrogen onto the surface of the transmission line 120. The flame retardant containing nitrogen can be continuously sprayed during the separation process of the transmission line 120 and the line interface 110, thereby extinguishing the flame at the transmission line 120. This not only inhibits the contact between oxygen and the surface of the transmission line 120, but also slows down the burning speed of the flame. A flame retardant layer is wrapped around the surface of the transmission line 120 to prevent the extinguished flame from covering it again, thereby preventing the flame from further eroding the transmission line 120, reducing the spread of the fire, and ensuring the safety of the equipment.

[0101] In some embodiments of the present application, Figure 11 and Figure 12 As shown, the outer side of the transmission line 120 is sleeved with an annular outer tube 121, the axis of the outer tube 121 coincides with the axis of the transmission line 120, and a gap is left between the outer tube 121 and the transmission line 120;

[0102] There are multiple micropores evenly spaced on the side of the outer tube 121 located outside the sealed chamber 230, and the diameter of the micropores is between 0.3nm and 0.5nm. There are no micropores on the side of the outer tube 121 located inside the sealed chamber 230. That is to say, before the transmission line 120 and the line interface 110 are separated, it is not easy for nitrogen to enter the gap between the outer tube 121 and the transmission line 120, and the amount of nitrogen entering the gap is small, which does not affect the effect of the nitrogen injected into the sealed chamber 230. The nitrogen in the sealed chamber 230 can achieve the effect of extinguishing the fire.

[0103] In the above embodiment, after the transmission line 120 and the line interface 110 are separated, the nitrogen in the sealed chamber 230 can enter the gap between the outer tube 121 and the transmission line 120. When the amount of nitrogen in the gap is large, the nitrogen can overflow from the micropores and form a protective layer around the transmission line 120, which not only has a cooling effect but also reduces the spread of fire.

[0104] In some embodiments of the present application, Figure 13 As shown, it also includes a host, a start / stop sensor, a power supply, and an acoustic and optical touch sensor. The mine intrinsically safe optical fiber camera 100 is electrically connected to the host through a circuit. The mine intrinsically safe optical fiber camera 100 performs person recognition, and the acoustic and optical touch sensor is used to sense people and other heat sources approaching the dangerous area.

[0105] The start / stop sensor is used to detect the operating status of equipment in the mine, and the power supply is used to power the electronic equipment of the mine proximity danger zone alarm device;

[0106] The acoustic and optical touch sensor is electrically connected to the host through a circuit. The host collects monitoring information of the mine intrinsically safe optical fiber camera 100 and the acoustic and optical touch sensor and analyzes the information.

[0107] It should be noted that all adjustments to the host are completed by the infrared remote control, and the sound and light touch sensor uses pyroelectric infrared human body sensing technology to monitor human bodies or other heat sources approaching the dangerous area.

[0108] Specifically, if Figure 13 As shown, it also includes an audible and visual alarm, a power-off controller and a personnel identification card;

[0109] The sound and light alarm is electrically connected to the host through a circuit, and the sound and light alarm is used to send out an alarm signal and perform voice broadcasting. The power-off controller is electrically connected to the host through a circuit, and the power-off controller is used to cut off the power supply to the device;

[0110] The personnel identification card is electrically connected to the host through a circuit, and the personnel identification card reads relevant information through a card reader electrically connected to the host. The personnel identification card is used to specify the identity of the personnel and allow personnel who have entered the system to enter the dangerous area. When personnel who have not entered the system approach the dangerous area, an alarm will be sounded through an audible and visual alarm or the equipment will be powered off to prevent accidental injury.

[0111] It is worth noting that the warnings given to people approaching dangerous areas are divided into two levels. The first level warning is an audible and visual safety alarm, which is broadcasted by voice through the audible and visual alarm. The second level warning is a power-off control, which directly cuts off the power supply to the equipment through the power-off controller.

[0112] In the above embodiment, the mine intrinsically safe optical fiber camera 100 is used to monitor the images of the dangerous area in the mine in real time. The mine intrinsically safe optical fiber camera 100 is used in conjunction with the acoustic and optical touch sensor. When the acoustic and optical touch sensor senses that a person is approaching within 5 meters of the dangerous area, the monitoring information is transmitted to the host computer, and the host computer analyzes and judges the monitoring information.

[0113] When the host analyzes and determines that a level one warning is required for approaching personnel, the host drives the sound and light alarm to issue a safety warning and announces "Danger area, please leave as soon as possible" by voice. If the personnel continue to approach the equipment after hearing the warning, the host drives the sound and light alarm to sound an alarm and drives the power-off controller at the same time, which cuts off the power supply to the equipment to avoid safety accidents.

[0114] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. The mine-used alarm device for approaching dangerous areas is characterized by: The invention comprises a mine-used intrinsically safe optical fiber camera (100), a line interface (110) being fixed on the mine-used intrinsically safe optical fiber camera (100), and a line interface (110) and a transmission line (120) being coupled and connected; Also included is a protection assembly (200); The protection assembly (200) includes an air source device (210), a vent pipe (220) and a sealing chamber (230); The sealed chamber (230) is a rectangular body with a hollow interior and is fixed on the intrinsically safe optical fiber camera (100) for mining, and the line interface (110) is located in the sealed chamber (230); A through hole is formed on the sealed chamber (230) away from the intrinsically safe optical fiber camera (100) for mining, one end of the transmission line (120) passes through the through hole and extends out of the sealed chamber (230), and the transmission line (120) is sealed and connected to the through hole; An infrared thermometer (231) is fixed inside the sealed chamber (230), and the infrared thermometer (231) is used to monitor the temperature at the joint of the transmission line (120) and the line interface (110); The vent pipe (220) is fixed on the sealed chamber (230), one end of the vent pipe (220) extends into the sealed chamber (230), and the other end of the vent pipe (220) is connected to the air source device (210); An air pump is fixed on the vent pipe (220), and the gas in the gas source device (210) is sent into the vent pipe (220) through the air pump. The gas source device (210) is a nitrogen bottle and is used to provide nitrogen to the sealed chamber (230).

2. The mine danger zone alarm device according to claim 1, characterized in that: The protection assembly (200) further includes a telescopic portion (240) and a supporting portion (250); The line interface (110) is a cylindrical joint, the telescopic portion (240) is an annular rubber bag and is fixed in the sealing chamber (230) near the line interface (110), and the telescopic portion (240) is located outside the line interface (110), and the axis of the telescopic portion (240) coincides with the axis of the line interface (110); An air supply pipe (221) is fixed on the vent pipe (220), the free end of the air supply pipe (221) passes through the sealing chamber (230) and extends into the telescopic portion (240), and an opening and closing valve is fixed on the air supply pipe (221); The support portion (250) is connected to the transmission line (120), and air is introduced into the telescopic portion (240) through the air supply pipe (221), so that the telescopic portion (240) expands and pushes the support portion (250) to move, thereby separating the transmission line (120) from the line interface (110).

3. The mine danger zone alarm device according to claim 2, characterized in that: The support portion (250) includes a bracket (251); There are two brackets (251), the two brackets (251) are parallel, and one end of the two brackets (251) close to the line interface (110) is connected to the telescopic part (240), and a positioning plate (252) is fixed between the two brackets (251) at one end away from the line interface (110); A through slot is formed in the middle of the positioning plate (252), and the transmission line (120) passes through the through slot and is fixed to the positioning plate (252); A glass fiber cloth is fixed to the outside of the telescopic part (240), and the glass fiber cloth can expand and contract along with the expansion and contraction of the telescopic part (240).

4. The mine danger zone alarm device according to claim 3, characterized in that: A second annular retaining plate (2512) is fixed on the two brackets (251) near the bottom of the telescopic portion (240); A ring-shaped retaining plate 1 (241) is fixed on the telescopic portion (240) near the bracket (251), and the retaining plate 1 (241) and the retaining plate 2 (2512) are fixedly connected; A positioning block (2521) is fixed on the positioning plate (252) away from the second retaining plate (2512), and a positioning seat (232) is fixed in the sealing chamber (230) near the positioning block (2521); The cross section of the positioning seat (232) is concave, and the positioning block (2521) extends into the positioning seat (232); When the bracket (251) moves, the positioning block (2521) can be embedded in the positioning seat (232).

5. The mine danger zone alarm device according to claim 3, characterized in that: The bracket (251) is a hollow box body and contains a flame retardant therein, the flame retardant being used to suppress the burning of sparks; A plurality of nozzles (2511) are fixed on one side of the bracket (251) close to the transmission line (120), and the nozzles (2511) are used to spray flame retardant to the transmission line (120); The two supports (251) are connected via a branch pipe (2221), and the free end of the branch pipe (2221) is connected to an air pump via a pipeline.

6. The mine danger zone alarm device according to claim 1, characterized in that: An air guide tube (222) is fixed to the vent tube (220), the free end of the air guide tube (222) extends into the sealed chamber (230), and the free end of the branch tube (2221) is connected to the extending end of the air guide tube (222); A one-way valve is fixed on the air guide tube (222), and the one-way valve is used to prevent the flame retardant from flowing back. The flame retardant in the bracket (251) is perfluoroacetone flame retardant.

7. The mine danger zone alarm device according to claim 1, characterized in that: A liquid storage box (270) is fixed outside the sealed chamber (230), the liquid storage box (270) contains a flame retardant, a liquid injection pipe (260) is connected to the liquid storage box (270), a liquid pump is fixed to the liquid injection pipe (260), and a plurality of diversion pipes (261) are fixed to the water outlet end of the liquid injection pipe (260); The free end of one of the diverter tubes (261) passes through the sealing chamber (230) and extends into the bracket (251), and the diverter tube (261) and the bracket (251) are sealed and connected.

8. The mine danger zone alarm device according to claim 1, characterized in that: An annular outer tube (121) is sleeved on the outer side of the transmission line (120), the axis of the outer tube (121) coincides with the axis of the transmission line (120), and a gap is left between the outer tube (121) and the transmission line (120); A plurality of micropores are evenly spaced apart on the side surface of the outer cylinder (121) located outside the sealing chamber (230).

9. The mine danger zone alarm device according to claim 1, characterized in that: It also includes a host, a start / stop sensor, a power supply, and an acoustic and optical touch sensor. The mine-used intrinsically safe optical fiber camera (100) is electrically connected to the host through a circuit. The acoustic and optical touch sensor is used to sense personnel and other heat sources approaching the dangerous area. The acoustic and optical touch sensor is electrically connected to a host computer via a circuit; the host computer collects monitoring information from the intrinsically safe optical fiber camera (100) for mining and the acoustic and optical touch sensor, and analyzes the information.

10. The mine danger zone alarm device according to claim 1, characterized in that: It also includes sound and light alarms, power-off controllers, and personnel identification cards; The sound and light alarm is electrically connected to the host through a circuit, and the sound and light alarm is used to send an alarm signal and perform voice broadcasting. The power-off controller is electrically connected to the host through a circuit, and the power-off controller is used to cut off the power supply to the device; The personnel identification card is electrically connected to the host through a circuit, and the personnel identification card is used to identify the identity of a person.

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