An automatic smoke alarm device for mines

Abstract

This utility model relates to the field of smoke alarm devices, specifically an automatic smoke alarm device for mines, including a housing, a trough, an electromagnet, a first spring, a gas cylinder, an inner tube, an outer tube, a cone, a smoke temperature sensor, and an audible and visual alarm. When the smoke temperature sensor detects in real time that the temperature or smoke concentration inside the switchgear exceeds a set fire threshold, the audible and visual alarm emits flashing warning lights and a warning sound. Simultaneously, the electromagnet is de-energized, the first spring resets, causing the gas cylinder to descend. The cone penetrates the gas cylinder's outlet, allowing the high-pressure carbon dioxide gas inside the cylinder to be released into the switchgear, extinguishing any fire inside. This timely extinguishing of fires inside the switchgear provides time for inspection personnel to arrive and address the issue, thereby reducing the risk of further fire spread and improving equipment safety.

Description

Technical Field

[0001] This utility model relates to the field of smoke alarm devices, specifically an automatic smoke alarm device for mines. Background Technology

[0002] Mining switchgear is a high-voltage power distribution equipment designed specifically for the special environment of underground coal mines. It is mainly used in places such as the bottom of the mine, the main intake airway, and the electromechanical room. It has the functions of power distribution, control and protection, and must meet the stringent requirements of explosion-proof, moisture-proof and impact-resistant in the special underground environment. In order to ensure the normal operation of mining switchgear, staff need to inspect and maintain it in real time.

[0003] A search revealed a patent application with application number 202022086836.1 that discloses a low-voltage switchgear with automatic high-temperature alarm. The switchgear includes a low-voltage switchgear and a heat dissipation box. A control box is fixedly installed on the top of the switchgear, and an alarm is fixedly installed on the top of the control box. An installation plate is fixedly installed inside the switchgear. A main switch, a connector, and a branch switch are fixedly installed on the front of the installation plate. A first temperature detection device and a second temperature detection device are also fixedly installed on the front of the installation plate. The temperature detection devices monitor the temperature of the equipment inside the low-voltage switchgear and transmit the monitoring information to the control box. When the temperature of any equipment is detected to be too high, the control box activates the alarm, notifying nearby inspection personnel to check and promptly cool the switchgear or cut off the power supply to prevent accidents.

[0004] In the aforementioned existing technology, the switch cabinet can only trigger an alarm after high temperature is generated, which can be checked by inspection personnel. However, once a fire occurs in the switch cabinet, it spreads extremely quickly, and it takes a certain amount of time for inspection personnel to reach the switch cabinet. This can easily cause the fire hazard inside the switch cabinet to expand, thereby damaging the equipment.

[0005] Therefore, an automatic smoke alarm device for mines is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A mine smoke automatic alarm device of this utility model includes a box body bolted to the side of a switch cabinet; a liftable slot box is slidably installed in the middle of the inner cavity of the box body; an electromagnet is bolted to the top of the inner cavity of the box body; multiple No. 1 springs are arranged on the outer side of the slot box; a carbon dioxide gas cylinder is installed in the middle of the inner cavity of the slot box, and the outlet end of the gas cylinder penetrates the bottom wall of the slot box; an inner tube sleeved on the outer ring of the gas cylinder is bolted to the bottom surface of the slot box; an outer tube sleeved on the outer ring of the inner tube is bolted to the bottom surface of the inner cavity of the box body; a conical spike capable of penetrating the outlet end of the gas cylinder is provided inside the outer tube; the bottom end of the outer tube is connected to the interior of the switch cabinet through a gas pipe; a smoke temperature sensor is fixedly connected to the inner side wall of the switch cabinet; and an audible and visual alarm is bolted to the top surface of the box body.

[0008] Preferably, a powder box is fixedly connected to the bottom of the inner cavity side wall of the switch cabinet; the powder box contains dry powder extinguishing agent; the bottom of the powder box is connected to the bottom end of the outer pipe through an air pipe; and multiple powder outlet slots are opened on the top side of the powder box near the switch cabinet.

[0009] Preferably, the bottom of the powder box is bolted with a hopper for holding dry powder extinguishing agent; air holes are provided on both sides of the bottom of the hopper.

[0010] Preferably, a sealing baffle is fixedly connected inside the powder outlet channel; the top and both sides of the sealing baffle are provided with deep cuts; and the bottom of the sealing baffle is provided with shallow cuts.

[0011] Preferably, a plurality of clips are evenly bolted inside the slot; the plurality of clips hold and fix the gas cylinder.

[0012] Preferably, a pressure cap is provided at the top of the inner cavity of the slot box; the bottom surface of the pressure cap matches the top of the gas tank; a second spring is fixed between the top of the pressure cap and the top surface of the inner cavity of the slot box.

[0013] Preferably, the top outer ring of the cone-shaped spike is provided with multiple air guide grooves.

[0014] Preferably, a sealed sliding plate is slidably installed on the side of the enclosure away from the switch cabinet.

[0015] The advantages of this utility model are:

[0016] 1. The automatic smoke alarm device for mines described in this utility model includes a housing, a trough, an electromagnet, a No. 1 spring, a gas cylinder, an inner tube, an outer tube, a cone, a smoke temperature sensor, and an audible and visual alarm. The smoke temperature sensor detects the temperature and smoke concentration inside the switch cabinet in real time, and the controller controls the power-on status of the electromagnet and the audible and visual alarm.

[0017] When the temperature or smoke concentration inside the switch cabinet rises, but not to the level that would cause a fire, the electromagnet is energized, causing it to attract the slot box. At the same time, the controller activates the audible and visual alarm, causing it to emit flashing warning lights and a warning sound to alert and notify inspection personnel to come and perform maintenance in a timely manner to prevent a fire.

[0018] When the temperature or smoke concentration inside the switchgear exceeds the set fire threshold, the controller activates the audible and visual alarm, causing it to emit flashing warning lights and a warning sound. Simultaneously, the electromagnet is de-energized, the first spring resets, and the gas cylinder descends. The cone pierces the outlet of the gas cylinder, releasing the high-pressure carbon dioxide gas inside into the switchgear, filling it with carbon dioxide gas to extinguish any fire inside. This timely action extinguishes the fire inside the switchgear and provides time for inspection personnel to arrive and address the situation, thus reducing the risk of further fire spread and improving equipment safety.

[0019] 2. The automatic smoke alarm device for mines described in this utility model comprises a powder box, a dry powder extinguishing agent, and a powder outlet channel. When the temperature or smoke concentration inside the switchgear exceeds a set fire threshold, high-pressure carbon dioxide gas from the gas cylinder is discharged into the bottom of the powder box inside the switchgear along the inner pipe, outer pipe, and gas pipe. The carbon dioxide gas then lifts the dry powder extinguishing agent inside the powder box, and the carbon dioxide gas carries the dry powder extinguishing agent out through the powder outlet channel on the powder box. This not only fills the inside of the switchgear with carbon dioxide gas, but also covers the inside of the switchgear with the dry powder extinguishing agent, thereby improving the fire extinguishing effect inside the switchgear. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the present utility model;

[0022] Figure 2 This is a schematic diagram of the internal side structure of the switch cabinet in this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the box in this utility model;

[0024] Figure 4This is an exploded structural diagram of the box body in this utility model;

[0025] Figure 5 This is a cross-sectional view of the box body in this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the No. 1 spring and the base plate in this utility model;

[0027] Figure 7 This is a schematic diagram of the inner and outer tubes in this utility model;

[0028] Figure 8 This is a schematic diagram of the exploded structure of the inner and outer tubes in this utility model;

[0029] Figure 9 This is a cross-sectional view of the inner and outer tubes in this utility model.

[0030] Figure 10 This is a schematic diagram of the cone spike and mounting bracket in this utility model;

[0031] Figure 11 This is a cross-sectional view of the powder box in this utility model;

[0032] Figure 12 This is a partial structural diagram of the powder outlet channel in this utility model;

[0033] Figure 13 This is a schematic diagram of the structure of the clip, the pressure cap, and the second spring in this utility model.

[0034] In the diagram: 1. Switch cabinet; 2. Cabinet; 3. Slot box; 4. Electromagnet; 5. Spring No. 1; 6. Gas tank; 7. Inner tube; 8. Outer tube; 9. Conical spike; 10. Smoke temperature sensor; 11. Audible and visual alarm; 12. Guide rail; 13. Top plate; 14. Bottom plate; 15. Mounting bracket; 16. Powder box; 17. Powder outlet chute; 18. Hopper; 19. Air hole; 20. Sealing baffle; 21. Clamping plate; 22. Pressure cap; 23. Spring No. 2; 24. Air guide channel; 25. Sealing slide plate. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] like Figures 1 to 10As shown, an automatic smoke alarm device for mines includes a housing 2 bolted to the side of a switch cabinet 1; a liftable slot box 3 is slidably installed in the middle of the inner cavity of the housing 2; an electromagnet 4 is bolted to the top of the inner cavity of the housing 2; multiple No. 1 springs 5 ​​are arranged on the outer side of the slot box 3; a carbon dioxide gas cylinder 6 is installed in the middle of the inner cavity of the slot box 3, and the outlet end of the gas cylinder 6 penetrates the bottom wall of the slot box 3; an inner tube 7 is bolted to the bottom surface of the slot box 3 and sleeved on the outer ring of the gas cylinder 6; an outer tube 8 is bolted to the bottom surface of the inner cavity of the housing 2 and sleeved on the outer ring of the inner tube 7; a conical spike 9 is provided inside the outer tube 8 that can penetrate the outlet end of the gas cylinder 6; the bottom end of the outer tube 8 is connected to the interior of the switch cabinet 1 through a gas pipe; a smoke temperature sensor 10 is fixed to the inner side wall of the switch cabinet 1; and an audible and visual alarm 11 is bolted to the top surface of the housing 2.

[0037] Specifically, the enclosure 2 is bolted to the side wall of the switch cabinet 1; multiple guide rails 12 are fixed to both sides of the inner wall of the enclosure 2, and a U-shaped top plate 13 is bolted to the top of the multiple guide rails 12, and the slot box 3 can pass through the inner side of the top plate 13; a U-shaped bottom plate 14 is bolted to the outer side of the bottom surface of the slot box 3, and the bottom plate 14 slides with the guide rails 12; a first spring 5 is set between the top plate 13 and the bottom plate 14, and the top of the first spring 5 is fixed to the bottom surface of the top plate 13, and the bottom of the first spring 5 is fixed to the top surface of the bottom plate 14.

[0038] The electromagnet 4 includes an outer shell bolted to the inner wall of the housing 2, an iron core inside the outer shell, and a coil around the outer ring of the iron core; a power supply and a controller are located on the top of the outer shell of the electromagnet 4; the controller controls the power supply to provide power to the electromagnet 4.

[0039] The slot box 3 has an opening on the side away from the switch cabinet 1. The bottom wall of the slot box 3 has a through hole, which allows the outlet of the gas tank 6 to pass through the through hole and enter the interior of the inner tube 7. A convex ring that matches the outer wall of the gas tank 6 is fixed to the bottom surface of the inner cavity of the slot box 3, and the convex ring is set on the outer ring of the through hole.

[0040] The bottom of the outer tube 8 penetrates the bottom wall of the box 2; the outer tube 8 is divided into a top tube and a bottom tube, and the boundary between the top tube and the bottom tube is located at the bottom surface of the inner cavity of the box 2; the inner diameter of the top tube of the outer tube 8 is the same as the inner diameter of the inner tube 7; the outer diameter of the bottom tube of the outer tube 8 is the same as the outer diameter of the inner tube 7, and the inner diameter of the bottom tube of the outer tube 8 is the same as the inner diameter of the inner tube 7; because the diameters of the top tube and the bottom tube of the outer tube 8 are different, a step is formed in the middle of the inner circle of the outer tube 8, that is, the top of the bottom tube; thus limiting the downward sliding distance of the inner tube 7;

[0041] Multiple annular grooves are provided on the top inner ring of the outer tube 8 and the bottom inner ring of the inner tube 7, and sealing rings are provided inside the annular grooves.

[0042] Multiple slots are provided around the top surface of the inner ring step of the outer tube 8. A mounting bracket 15 is provided in the middle of the inner ring of the outer tube 8. The middle part of the mounting bracket 15 is an internal threaded cylinder. Multiple crossbars are fixed around the bottom outer ring of the internal threaded cylinder. The end of the crossbar away from the internal threaded cylinder is locked inside the slot. A screw hole is provided at the end of the crossbar corresponding to the slot. A screw is installed in the internal thread of the screw hole.

[0043] The top of the cone-shaped spike 9 is a cone-shaped column, and the bottom of the cone-shaped spike 9 is a threaded column; a convex ring is fixed to the outer ring at the junction of the cone-shaped column and the threaded column of the cone-shaped spike 9, and an anti-slip groove is opened on the outer ring of the convex ring; the threaded column of the cone-shaped spike 9 is threaded into the inner threaded cylinder of the mounting bracket 15.

[0044] The smoke temperature sensor 10 is fixedly installed on the inner cavity side wall of the switch cabinet 1 by screws. The smoke temperature sensor 10 can detect the temperature and smoke concentration inside the switch cabinet 1 in real time. The audible and visual alarm 11 can emit flashing warning lights and warning sounds. Both the smoke temperature sensor 10 and the audible and visual alarm 11 are electrically connected to the controller on the top of the electromagnet 4.

[0045] When switch cabinet 1 is in normal use, the temperature and smoke concentration inside switch cabinet 1 are both lower than the set warning value. The smoke temperature sensor 10 detects the temperature and smoke concentration inside switch cabinet 1 in real time and transmits the detected temperature and smoke concentration values ​​to the controller. The controller controls the audible and visual alarm 11 to be in the power-off state. At the same time, the controller controls the electromagnet 4 to be in the energized state. The energized electromagnet 4 generates magnetic force, attracting the slot box 3 to slide upward along the guide rail 12, driving the bottom plate 14 to slide upward, and cooperating with the top plate 13 to compress and store the first spring 5.

[0046] When the temperature or smoke concentration inside switchgear 1 rises but does not reach the level that could cause a fire, the temperature or smoke concentration inside switchgear 1 is higher than the set warning value but lower than the set fire value. The smoke and temperature sensor 10 detects the temperature and smoke concentration inside switchgear 1 in real time and transmits the detected temperature and smoke concentration values ​​to the controller. The controller controls the electromagnet 4 to be energized, so that the electromagnet 4 attracts the slot box 3. At the same time, the controller controls the audible and visual alarm 11 to be energized, so that the audible and visual alarm 11 emits flashing warning lights and warning sounds to warn and notify the inspection personnel to come and perform maintenance in time to avoid the occurrence of a fire.

[0047] When the temperature or smoke concentration inside switchgear 1 exceeds the set fire threshold, a fire is detected inside switchgear 1. The smoke and temperature sensor 10 monitors the temperature and smoke concentration inside switchgear 1 in real time and transmits the detected values ​​to the controller. The controller then powers on the audible and visual alarm 11, causing it to emit flashing warning lights and a warning sound. Simultaneously, the controller de-energizes the electromagnet 4, demagnetizing it and resetting the first spring 5. The first spring 5 pushes the base plate 14 downwards along the guide rail 12, causing the slot box 3 and gas cylinder 6 to descend. As the height decreases, the inner tube 7 of the slot box 3 slides into the outer tube 8, causing the cone 9 to penetrate the outlet of the gas tank 6. This allows the high-pressure carbon dioxide gas inside the gas tank 6 to be ejected from the outlet of the gas tank 6. The high-pressure carbon dioxide gas is discharged into the interior of the switch cabinet 1 along the inner tube 7, the outer tube 8, and the gas pipe, filling the interior of the switch cabinet 1 with carbon dioxide gas. This extinguishes any fire inside the switch cabinet 1, thus promptly extinguishing the fire and providing time for inspection personnel to arrive and handle the situation. This reduces the risk of the fire spreading further inside the switch cabinet 1 and improves the safety of the equipment.

[0048] In some embodiments, such as Figure 1 , Figure 2 and Figure 11 As shown, a powder box 16 is fixedly connected to the bottom of the inner cavity side wall of the switch cabinet 1; the powder box 16 is filled with dry powder extinguishing agent; the bottom of the powder box 16 is connected to the bottom end of the outer pipe 8 through a gas pipe; multiple powder outlet slots 17 are opened on the top side of the powder box 16 near the switch cabinet 1.

[0049] Specifically, an air nozzle is provided on the bottom of the toner box 16 near the side of the cabinet 2, and the air nozzle penetrates the side wall of the switch cabinet 1. The air nozzle of the toner box 16 is connected to the bottom end of the outer tube 8 through an air pipe. An opening is provided on the top of the toner box 16, and a sealing cover is fixedly installed by screws.

[0050] When the temperature or smoke concentration inside switchgear 1 exceeds the set fire threshold, the high-pressure carbon dioxide gas inside the gas cylinder 6 is discharged into the bottom of the powder box 16 inside switchgear 1 along the inner pipe 7, outer pipe 8 and gas pipe. The carbon dioxide gas lifts the dry powder extinguishing agent inside the powder box 16, and the carbon dioxide gas carries the dry powder extinguishing agent out of the powder outlet channel 17 on the powder box 16. This not only fills the inside of switchgear 1 with carbon dioxide gas, but also covers the inside of switchgear 1 with dry powder extinguishing agent, thereby improving the fire extinguishing effect inside switchgear 1.

[0051] In some embodiments, such as Figure 11 As shown, a hopper 18 for holding dry powder extinguishing agent is bolted to the bottom of the powder box 16; air holes 19 are provided on both sides of the bottom of the hopper 18.

[0052] Specifically, both sides of the bottom of the hopper 18 are provided with inclined surfaces that slope inward, and the bottom of the inclined surfaces is a vertical plane; the air holes 19 are opened on the vertical planes on both sides of the bottom of the hopper 18; the inclined surfaces on both sides of the hopper 18 block the air holes 19, thereby effectively reducing the leakage of dry powder extinguishing agent from the air holes 19.

[0053] The multiple air holes 19 on both sides allow carbon dioxide gas to enter the bottom of the hopper 18 evenly, thereby allowing the carbon dioxide gas to carry and lift the dry powder extinguishing agent evenly.

[0054] The dry powder extinguishing agent is stored in the hopper 18, which facilitates the replacement and addition of the dry powder extinguishing agent.

[0055] Furthermore, such as Figures 11 to 12 As shown, a sealing baffle 20 is fixedly connected inside the powder outlet channel 17; deep cuts are provided on the top and both sides of the sealing baffle 20; and shallow cuts are provided on the bottom of the sealing baffle 20.

[0056] Specifically, the top and sides of the sealing baffle 20 are provided with deep cuts, and the bottom is provided with shallow cuts. When the sealing baffle 20 is impacted, the deep cuts on the top and sides of the sealing baffle 20 will break, while the shallow cuts on the bottom will bend, causing the sealing baffle 20 to bend and expose the powder outlet groove 17.

[0057] When switchgear 1 is working normally, the sealing baffle 20 seals the powder outlet channel 17, sealing and isolating the dry powder extinguishing agent, thereby effectively ensuring the effectiveness of the dry powder extinguishing agent.

[0058] When the temperature or smoke concentration inside switchgear 1 exceeds the set fire threshold, the No. 2 carbide gas lifts the dry powder extinguishing agent inside powder box 16, increasing the pressure inside powder box 16. This causes the deep cuts on the top and sides of the sealing baffle 20 to break, while the shallow cuts on the bottom to bend, exposing the powder outlet channel 17. Simultaneously, the sealing baffle 20 will tilt upwards at the powder outlet channel 17. When the No. 2 carbide gas carrying the dry powder extinguishing agent is ejected from the powder outlet channel 17 on powder box 16, it is blocked and guided by the tilted sealing baffle 20, causing the No. 2 carbide gas carrying the dry powder extinguishing agent to spray upwards into the interior of switchgear 1, thereby effectively increasing the coverage area of ​​the dry powder extinguishing agent inside switchgear 1.

[0059] Furthermore, such as Figure 3 , Figure 4 , Figure 5 and Figure 13 As shown, multiple clips 21 are evenly bolted inside the slot box 3; the multiple clips 21 clamp and fix the gas tank 6.

[0060] Specifically, the clamp 21 has a U-shaped structure; multiple straight slots are provided on the side of the clamp 21 near the inner wall of the slot box 3, and it is fixed by screws; the two sides of the clamp 21 are symmetrical arc-shaped spring pieces, which can clamp the outer wall of the gas tank 6.

[0061] By setting multiple clamps 21 to hold and fix the gas tank 6, not only is the stability of the gas tank 6 fixed, but the gas tank 6 is also easy to replace.

[0062] Furthermore, such as Figure 3 , Figure 4 , Figure 5 and Figure 13 As shown, a pressure cap 22 is provided at the top of the inner cavity of the slot box 3; the bottom surface of the pressure cap 22 matches the top of the gas tank 6; a second spring 23 is fixed between the top of the pressure cap 22 and the top surface of the inner cavity of the slot box 3.

[0063] Specifically, the bottom of the pressure cap 22 is provided with a hemispherical groove that matches the top of the gas tank 6; the pressure cap 22 is pushed downward by the second spring 23, and the pressure cap 22 presses down on the gas tank 6; this not only improves the installation firmness of the gas tank 6, but also improves the effect of the gas tank 6 being punctured by the cone 9.

[0064] Furthermore, such as Figures 9 to 10 As shown, the top outer ring of the cone 9 is provided with multiple air guide grooves 24;

[0065] Specifically, by opening the air guide groove 24 on the outer ring of the cone 9, when the cone 9 passes through the air outlet of the gas tank 6, the high-pressure carbon dioxide gas inside the gas tank 6 can be quickly discharged along the air guide groove 24, thereby improving the fire extinguishing speed inside the switch cabinet 1.

[0066] Furthermore, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a sealing slide plate 25 is slidably installed on the side of the enclosure 2 away from the switch cabinet 1;

[0067] Specifically, the side of the enclosure 2 away from the switch cabinet 1 has an opening, and the top of the enclosure 2, at the opening, has a slot. The sealing slide plate 25 is inserted into the slot to block and seal the opening of the enclosure 2.

[0068] The sealing slide plate 25 not only seals and shields the inside of the box 2, improving the safety of the inside of the box 2, but also facilitates the replacement of the gas tank 6 inside the box 2.

[0069] Working principle: When switch cabinet 1 is in normal use, the temperature and smoke concentration inside switch cabinet 1 are both lower than the set warning value. The smoke temperature sensor 10 detects the temperature and smoke concentration inside switch cabinet 1 in real time and transmits the detected temperature and smoke concentration values ​​to the controller. The controller controls the audible and visual alarm 11 to be in the power-off state. At the same time, the controller controls the electromagnet 4 to be in the energized state. The energized electromagnet 4 generates magnetic force, which attracts the slot box 3 to slide upward along the guide rail 12, driving the base plate 14 to slide upward. In conjunction with the top plate 13, the first spring 5 is compressed and stores force.

[0070] When the temperature or smoke concentration inside switchgear 1 rises but does not reach the level that could cause a fire, the temperature or smoke concentration inside switchgear 1 is higher than the set warning value but lower than the set fire value. The smoke and temperature sensor 10 detects the temperature and smoke concentration inside switchgear 1 in real time and transmits the detected temperature and smoke concentration values ​​to the controller. The controller controls the electromagnet 4 to be energized, so that the electromagnet 4 attracts the slot box 3. At the same time, the controller controls the audible and visual alarm 11 to be energized, so that the audible and visual alarm 11 emits flashing warning lights and warning sounds to warn and notify the inspection personnel to come and perform maintenance in time to avoid the occurrence of a fire.

[0071] When the temperature or smoke concentration inside switch cabinet 1 exceeds the set fire value, that is, when a fire occurs inside switch cabinet 1; the smoke temperature sensor 10 monitors the temperature and smoke concentration inside switch cabinet 1 in real time and transmits the detected temperature and smoke concentration values ​​to the controller. The controller controls the audible and visual alarm 11 to be powered on, so that the audible and visual alarm 11 emits flashing warning lights and warning sounds.

[0072] Simultaneously, the controller de-energizes electromagnet 4, causing it to lose its magnetism. Spring 5 resets, pushing base plate 14 downwards along guide rail 12, lowering the height of tank 3 and gas tank 6. Tank 3 causes inner tube 7 to slide into outer tube 8, allowing cone 9 to penetrate the outlet of gas tank 6. This causes high-pressure carbon dioxide gas inside gas tank 6 to be ejected from the outlet of gas tank 6. The high-pressure carbon dioxide gas flows along inner tube 7, outer tube 8, and gas pipe into the bottom of powder box 16 inside switch cabinet 1. The carbon dioxide gas passes through air hole 19 and enters the bottom of hopper 18. The carbon dioxide gas evenly carries and lifts the dry powder extinguishing agent, while increasing the pressure inside the powder box 16. This causes the deep cuts on the top and sides of the sealing baffle 20 to break, while the shallow cuts on the bottom to bend, exposing the powder outlet channel 17. At the same time, the sealing baffle 20 will tilt upwards at the powder outlet channel 17. When the second carbon dioxide gas carrying the dry powder extinguishing agent is sprayed out from the powder outlet channel 17 on the powder box 16, it is blocked and guided by the tilted sealing baffle 20, causing the second carbon dioxide gas carrying the dry powder extinguishing agent to spray upwards into the interior of the switch cabinet 1.

[0073] Carbon dioxide gas fills the interior of switchgear 1, and dry powder extinguishing agent covers the interior of switchgear 1, thereby extinguishing the fire inside switchgear 1 in a timely manner. At the same time, it provides time for inspection personnel to arrive and handle the situation, thus reducing the risk of the fire inside switchgear 1 spreading further and improving the safety of the equipment.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An automatic smoke alarm device for mines, characterized in that: The system includes a housing bolted to the side of a switch cabinet; a liftable slot box slidably installed in the center of the housing's inner cavity; an electromagnet bolted to the top of the housing's inner cavity; multiple No. 1 springs installed on the outside of the slot box; a carbon dioxide gas cylinder installed in the center of the slot box's inner cavity, with the cylinder's outlet penetrating the bottom wall of the slot box; an inner tube fitted around the outer ring of the gas cylinder bolted to the bottom of the slot box; an outer tube fitted around the outer ring of the inner tube bolted to the bottom of the housing's inner cavity; a conical spike inside the outer tube capable of penetrating the gas cylinder's outlet; the bottom end of the outer tube connecting to the interior of the switch cabinet via a gas pipe; a smoke temperature sensor fixed to the inner side wall of the switch cabinet; and an audible and visual alarm bolted to the top of the housing.

2. A mine smoke automatic alarm device according to claim 1, characterized in that: A powder box is fixed to the bottom of the inner cavity side wall of the switch cabinet; the powder box is filled with dry powder extinguishing agent; the bottom of the powder box is connected to the bottom end of the outer pipe through a gas pipe; multiple powder outlet slots are opened on the top side of the powder box near the switch cabinet.

3. The automatic smoke alarm device for mines according to claim 2, characterized in that: The bottom of the powder box is bolted with a hopper for holding dry powder extinguishing agent; air holes are provided on both sides of the bottom of the hopper.

4. The automatic smoke alarm device for mines according to claim 2, characterized in that: A sealing baffle is fixedly connected inside the powder outlet channel; deep cuts are made on the top and both sides of the sealing baffle; and shallow cuts are made on the bottom of the sealing baffle.

5. The automatic smoke alarm device for mines according to claim 1, characterized in that: The inside of the slot is evenly bolted with multiple clips; the multiple clips hold and fix the gas cylinder.

6. The automatic smoke alarm device for mines according to claim 5, characterized in that: A pressure cap is provided at the top of the inner cavity of the slot box; the bottom surface of the pressure cap matches the top of the gas tank; a second spring is fixed between the top of the pressure cap and the top surface of the inner cavity of the slot box.

7. The automatic smoke alarm device for mines according to claim 1, characterized in that: The top outer ring of the cone has multiple air guide grooves.

8. The automatic smoke alarm device for mines according to claim 7, characterized in that: A sealed sliding plate is slidably installed on the side of the enclosure away from the switch cabinet.

Images