Intelligent monitoring fire prevention and extinguishing device for underground coal mine chamber

Abstract

The utility model discloses a kind of coal mine underground chamber intelligent monitoring fire prevention fire extinguishing device, including the isolation box of being installed in the external power equipment, one side upper end of the isolation box is equipped with a first air inlet, the other side inner wall of the isolation box is equipped with air outlet, and the air outlet is equipped with exhaust fan;Compared with prior art, the beneficial effects of the utility model are as follows: the utility model one kind of coal mine underground chamber intelligent monitoring fire prevention fire extinguishing device places power equipment in isolation box, exhaust fan is ventilated and cooled through first grade, secondary air inlet during normal operation, and air inlet is accurately aligned with the main heat source of daughter-mother plug connector, effectively dissipates heat;Temperature, flame sensor is simultaneously used to monitor fire in real time, once there is flame, PLC controller drives isolation plate to move down, rapidly blocks secondary air inlet and disconnects cable connector, cuts off fire spreading path and prevents harmful gas diffusion.

Description

Technical Field

[0001] This utility model relates to the field of fire prevention technology, specifically to an intelligent monitoring and fire extinguishing device for underground coal mine chambers. Background Technology

[0002] Safety is paramount during underground coal mine operations. Existing underground refuge chambers, such as the improved mine refuge chamber described in Chinese utility model patent CN205422809 (authorization announcement number CN205422809), include a chamber body, isolation panels, emergency lights, a siphon pipe, an air purification device, an isolation door, a sealed door, an exhaust fan, a power supply, communication equipment, a pulse transmitter, an oxygen generator, a seat, oxygen cylinders, a bed, shelves, cabinets, and a medicine box. Four emergency lights are symmetrically installed on the outer side of the chamber body, and each emergency light contains a wireless receiving module.

[0003] However, when people seeking refuge are in a confined space with electrical equipment, if an electrical fire occurs, such as a cable short circuit or frequency converter overload, dense smoke and toxic gases will instantly fill the chamber, leaving coal miners with nowhere to hide. Furthermore, the highly toxic gases such as HCl and SO2 released by the burning electrical equipment mix with the existing gas and coal dust underground, forming a complex asphyxiating environment that can cause unconsciousness within 10 minutes.

[0004] Therefore, it is necessary to conduct fire prevention monitoring on the electrical equipment in underground coal mine chambers and to be able to respond quickly in the event of a fire. Utility Model Content

[0005] The purpose of this utility model is to propose an intelligent monitoring and fire prevention and extinguishing device for underground coal mine chambers. It can quickly cut off the contact between the fire source of electrical equipment and the air through an intelligent isolation box, and link multiple fire extinguishing methods to prevent the spread of toxic gas and the expansion of fire, and ensure the air safety of underground refuge chambers.

[0006] This utility model provides the following technical solution: an intelligent monitoring and fire prevention and extinguishing device for underground coal mine chambers, including an isolation box installed outside the power equipment, a primary air inlet penetrating through the upper end of one side of the isolation box, an air outlet penetrating through the inner wall of the other side of the isolation box, and an exhaust fan installed at the air outlet;

[0007] An isolation plate is vertically and movably installed at the upper part of the inner side of the isolation box via a driving mechanism. A secondary air inlet is provided through one end of the isolation plate. The secondary air inlet is fixed with detachable female and male connectors a and b via a fixing block. Female and male connector a is electrically connected to one end of an external cable. The external cable is fixed to the upper part of the isolation box. Female and male connector b is electrically connected to an internal cable inside the isolation box. An air inlet baffle is fixed on the inner wall of the isolation box below the secondary air inlet.

[0008] Wherein, an air outlet baffle is fixed at the end of the isolation plate away from the secondary air inlet. When the driving mechanism drives the isolation plate to move downward, the male and female connectors a and b separate, and the air inlet baffle and the air outlet baffle respectively block the secondary air inlet and the air outlet.

[0009] Preferably, the driving mechanism is a telescopic cylinder.

[0010] Preferably, the isolation chamber is equipped with a PLC controller, a temperature sensor, and a flame sensor. The signal output terminals of the temperature sensor and the flame sensor are connected to the signal input terminals of the PLC controller, and the signal output terminals of the PLC controller are connected to the signal input terminals of the telescopic cylinder and the exhaust fan.

[0011] Preferably, the lower end of the isolation box is equipped with casters.

[0012] Preferably, a side plate is fixed to one end of the isolation plate near the secondary air inlet, and a sand storage space for storing fire extinguishing sand is formed on the surface of the isolation plate;

[0013] The isolation plate is provided with a sand discharge hole, and the sand storage space is fixed with a plug by a fixing frame. The plug is movably installed in the sand discharge hole.

[0014] Preferably, a fire extinguisher is installed inside the isolation box, and the fire extinguisher is equipped with a solenoid valve, which is connected to the PLC controller.

[0015] Preferably, the primary air inlet is equipped with an adsorbent.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an intelligent monitoring and fire prevention and extinguishing device for underground coal mine chambers. The electrical equipment is placed in an isolated enclosure. During normal operation, the exhaust fan ventilates and cools the equipment through primary and secondary air inlets, with the inlets precisely aligned with the main heat source—the female connector—for effective heat dissipation. Simultaneously, temperature and flame sensors monitor the fire situation in real time. Once a flame appears, the PLC controller drives the isolation plate to move downwards, quickly blocking the secondary air inlet and disconnecting the cable connector, cutting off the path of fire spread and preventing the diffusion of harmful gases. Furthermore, the device is equipped with fire extinguishing sand. When the isolation plate moves downwards via the drive mechanism, the plug of the sand discharge hole opens, allowing the fire extinguishing sand to be automatically discharged and extinguish the flames. This multi-pronged approach comprehensively ensures the safety of underground coal mine chambers in the event of a fire involving electrical equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Figure 4 This is a schematic diagram of another internal structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the connection structure of the control module of this utility model.

[0022] In the diagram: 1. External cable; 2. Adsorbent; 3. Primary air inlet; 4. Air inlet baffle; 5. Internal cable; 6. Casters; 7. Side plate; 8. Isolation plate; 9. Sand storage space; 10. Sand discharge hole; 11. Plug; 12. Drive mechanism; 13. Air outlet; 14. Air outlet baffle; 15. Exhaust fan; 16. Temperature sensor; 17. PLC controller; 18. Mounting frame; 19. Flame sensor; 20. Electrical equipment; 21. Isolation box; 22a, 22b. Plugs; 23. Secondary air inlet; 24. Fire extinguisher. Detailed Implementation

[0023] 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 protection scope of the present utility model.

[0024] Please see Figure 1-5 .

[0025] Example 1

[0026] A smart monitoring and fire prevention and extinguishing device for underground coal mine chambers includes an isolation box 21 installed outside an electrical equipment 20. A primary air inlet 3 is provided through the upper end of one side of the isolation box 21, and an air outlet 13 is provided through the inner wall of the other side of the isolation box 21. An exhaust fan 15 is installed at the air outlet 13. By placing the electrical equipment 20 inside the isolation box 21, when a fire occurs in the electrical equipment 20, the isolation box 21 can quickly isolate the electrical equipment 20, suppress the spread of the fire to other parts of the chamber, and prevent the diffusion of harmful gases. Under normal circumstances, the electrical equipment 20 is properly ventilated by the primary air inlet 3, the air outlet 13, and the exhaust fan 15, ensuring the normal operation of the electrical equipment 20.

[0027] An isolation plate 8 is vertically and movably mounted on the upper part of the inner side of the isolation box 21 via a drive mechanism 12. A secondary air inlet 23 is provided through one end of the isolation plate 8. The secondary air inlet 23 is fixed with detachable female and male connectors 22a and 22b by a fixing block. The female and male connectors 22a and 22b are plug-in cable connectors that can be connected together by plugging. Specifically, the female and male connector 22a is electrically connected to one end of the external cable 1, which is fixed to the upper end of the isolation box 21. The female and male connector 22b is electrically connected to the internal cable 5 inside the isolation box 21. An air inlet baffle 4 is fixed on the inner wall of the isolation box 21 below the secondary air inlet 23. An air outlet baffle 14 is fixed on the end of the isolation plate 8 away from the secondary air inlet 23. When the drive mechanism 12 drives the isolation plate 8 to move downward, the female and male connectors 22a and 22b separate, and the air inlet baffle 4 and the air outlet baffle 14 block the secondary air inlet 23 and the air outlet 13, respectively.

[0028] With the above-described structure, when the power equipment 20 is working normally, the exhaust fan 15 operates, and external air enters the isolation box 21 through the primary air inlet 3, and then enters the lower part of the isolation box 21, where the power equipment 20 is located, through the secondary air inlet 23, thus achieving the function of cooling and heat dissipation. It is worth mentioning that when the air enters through the secondary air inlet 23, it will accurately pass through the main heat source, the female and male connectors 22a and 22b, for effective cooling. In the event of a fire, the drive mechanism 12 drives the isolation plate 8 to move downward, separating the female and male connectors 22a and 22b, preventing the fire inside the isolation box 21 from spreading outward through the cables. In addition, when the isolation plate 8 moves downward, the air inlet baffle 4 blocks the opening of the secondary air inlet 23, and the air outlet baffle 14 blocks the air outlet 13, thereby isolating the power equipment 20 from the outside air and achieving a fire extinguishing effect by reducing the amount of air entering.

[0029] The drive mechanism 12 is a telescopic cylinder.

[0030] Furthermore, the isolation chamber 21 is equipped with a PLC controller 17, a temperature sensor 16, and a flame sensor 19. The signal output terminals of the temperature sensor 16 and the flame sensor 19 are connected to the signal input terminals of the PLC controller 17. The signal output terminal of the PLC controller 17 is connected to the signal input terminals of the telescopic cylinder and the exhaust fan 15. The temperature sensor 16 is used to monitor the temperature inside the isolation chamber 21, the flame sensor 19 is used to monitor whether a fire has occurred, and the PLC controller 17 is used to control the start and stop of the exhaust fan 15 and the telescopic cylinder.

[0031] The fire extinguisher 24 is installed inside the isolation box 21. The fire extinguisher 24 is equipped with a solenoid valve, which is connected to the PLC controller 17. The solenoid valve is opened by the PLC controller 17, so that the fire extinguisher 24 can work. This is the prior art. The principle can be referred to the Chinese utility model patent for intelligent fire extinguisher head with authorization announcement number CN212880690U. It will not be elaborated here.

[0032] The primary air inlet 3 is equipped with an adsorbent 2, which can be a CO adsorbent or a comprehensive adsorbent. The comprehensive adsorbent is used to remove other harmful gases, while the CO adsorbent and the comprehensive adsorbent are used to purify the air in the mine chamber. This is existing technology. For reference, please refer to the Chinese utility model patent with authorization announcement number CN 205422809 U, which describes an improved mine refuge chamber.

[0033] To facilitate the movement of the isolation box 21, the lower end of the isolation box 21 is equipped with casters 6.

[0034] Example 2

[0035] Example 2 is roughly the same as Example 1 in structure, except that: a side plate 7 is fixed to one end of the isolation plate 8 near the secondary air inlet 23, and a sand storage space 9 for storing fire extinguishing sand is formed on the surface of the isolation plate 8. A sand discharge hole 10 is provided through the isolation plate 8, and a plug 11 is fixed to the sand storage space 9 by a fixing frame 18. The plug 11 is movably set in the sand discharge hole 10. When the driving mechanism 12 drives the isolation plate 8 to move downward, the sand discharge hole 10 opens, and the fire extinguishing sand in the sand storage space 9 is discharged through the sand discharge hole 10 to extinguish the flame.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart monitoring and fire prevention / extinguishing device for underground coal mine chambers, characterized in that: It includes an isolation box (21) installed outside the power equipment (20), with a primary air inlet (3) penetrating through the upper end of one side of the isolation box (21), and an air outlet (13) penetrating through the inner wall of the other side of the isolation box (21), and an exhaust fan (15) installed in the air outlet (13). An isolation plate (8) is vertically and movably installed on the upper part of the inner side of the isolation box (21) via a drive mechanism (12). A secondary air inlet (23) is provided through one end of the isolation plate (8). A detachable female and male connector (22a, 22b) is fixed to the secondary air inlet (23) via a fixing block. The female and male connector (22a) is electrically connected to one end of an external cable (1). The external cable (1) is fixed to the upper end of the isolation box (21). The female and male connector (22b) is electrically connected to an internal cable (5) inside the isolation box (21). An air inlet baffle (4) is fixed on the inner wall of the isolation box (21) below the secondary air inlet (23). Wherein, the end of the isolation plate (8) away from the secondary air inlet (23) is fixed with an air outlet baffle (14). When the driving mechanism (12) drives the isolation plate (8) to move downward, the female and male connectors (22a) and (22b) separate, and the air inlet baffle (4) and the air outlet baffle (14) block the secondary air inlet (23) and the air outlet (13) respectively.

2. The intelligent monitoring fire-preventing and extinguishing device for underground coal mine chamber according to claim 1, characterized in that: The drive mechanism (12) is a telescopic cylinder.

3. The intelligent monitoring fire-preventing and extinguishing device for underground coal mine chamber according to claim 2, characterized in that: The isolation box (21) is equipped with a PLC controller (17), a temperature sensor (16) and a flame sensor (19). The signal output terminals of the temperature sensor (16) and the flame sensor (19) are connected to the signal input terminals of the PLC controller (17). The signal output terminals of the PLC controller (17) are connected to the signal input terminals of the telescopic cylinder and the exhaust fan (15).

4. The intelligent monitoring fire-preventing and extinguishing device for underground coal mine chamber according to claim 1, characterized in that: The lower end of the isolation box (21) is equipped with casters (6).

5. The intelligent monitoring fire-preventing and extinguishing device for underground coal mine chamber according to claim 1, characterized in that: The isolation plate (8) has a side plate (7) fixed on one end of its surface near the secondary air inlet (23), and the surface of the isolation plate (8) has a sand storage space (9) for storing fire extinguishing sand. The isolation plate (8) is provided with a sand discharge hole (10) through it, and the sand storage space (9) is fixed with a plug (11) by a fixing frame (18). The plug (11) is movably disposed in the sand discharge hole (10).

6. The intelligent monitoring fire-preventing and extinguishing device for underground coal mine chamber according to claim 3, characterized in that: The isolation box (21) is equipped with a fire extinguisher (24), which is equipped with a solenoid valve and is connected to the PLC controller (17).

7. The intelligent monitoring fire-preventing and extinguishing device for underground coal mine chamber according to claim 1, characterized in that: The primary air inlet (3) is equipped with an adsorbent (2).

Images