An automatic alarm fire extinguishing device for underground coal mines

Abstract

The application discloses a coal mine underground automatic alarm fire extinguishing device, and relates to the technical field of fire extinguishing devices. The device comprises a fixed guide rail, which is laid on the top of a coal mine shaft; a walking mechanism, which is movably arranged on the fixed guide rail; an alarm fire extinguishing assembly, which is arranged below the walking mechanism; and a supply tank, which is fixedly arranged on the upper end of the walking mechanism, is arranged in parallel and is used for supplying fire extinguishing agents into the alarm fire extinguishing assembly.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing device technology, specifically an automatic alarm and fire extinguishing device for underground coal mines. Background Technology

[0002] Fire is a common accident in coal mines. Therefore, automatic alarm and fire extinguishing devices in coal mines are a very important technology in coal mine safety production. They can effectively prevent and suppress mine fires and protect the lives of underground workers. Existing fire extinguishing methods in coal mines often use water-based fire extinguishing and inert gas fire extinguishing. However, these methods cannot effectively conduct real-time patrols and inspections, and their fire extinguishing is limited to a single point (first extinguishing the fire at that point and then moving to other fire points), resulting in poor fire extinguishing effects.

[0003] Therefore, it is necessary to provide an automatic alarm and fire extinguishing device for underground coal mines to solve the problems mentioned in the background art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic alarm and fire extinguishing device for underground coal mines, comprising:

[0005] Fixed guide rails are laid on the top of the coal mine shaft;

[0006] The walking mechanism is movably mounted on the fixed guide rail;

[0007] An alarm and fire extinguishing assembly is located below the walking mechanism; and

[0008] The supply tanks, which are fixedly installed on the upper end of the traveling mechanism, are arranged in a row of multiple tanks and are used to supply extinguishing agents to the alarm and extinguishing components.

[0009] Furthermore, preferably, the alarm and fire extinguishing components are provided corresponding to the supply outlets of the storage tank, and their numbers are matched.

[0010] Furthermore, preferably, the alarm and fire extinguishing assembly includes:

[0011] The mounting housing is movably mounted on the fixed guide rail, and the mounting housing is equipped with a visual inspection mechanism and a thermal imaging mechanism.

[0012] Fire extinguishing nozzle assembly, which is disposed within the mounting housing.

[0013] Furthermore, as a preferred embodiment, the walking mechanism is also equipped with a control system, which controls the walking mechanism to walk and patrol on the fixed guide rail at regular intervals, and can move to the fire location and adjust the movement state of the fire extinguishing nozzles based on data feedback from the visual detection mechanism and the thermal imaging mechanism.

[0014] Furthermore, as a preferred embodiment, the fire extinguishing nozzle includes:

[0015] A supply pipe connected to the supply outlet of the storage tank;

[0016] A side support fixed to the mounting housing, wherein four electric push rods are circumferentially fixed on the side support;

[0017] There are four extension plates arranged circumferentially, which are rotatably set at the lower end of the supply pipe and are respectively hinged to the four electric push rods. Each extension plate has a through hole.

[0018] The miniature cylinder body consists of four circumferentially arranged cylinders, which are fixed inside the mounting shell. A telescopic shaft is slidably arranged inside the cylinder body, and the telescopic shaft is vertically slidably arranged in the through hole.

[0019] The guide plug is disposed between the four extension plates, and its upper end is fixed to the four telescopic shafts respectively.

[0020] Furthermore, as a preferred embodiment, each of the four extension plates is provided with a telescopic guide plate at its corner, and the four extension plates are all of the same length.

[0021] Furthermore, as a preferred embodiment, the guide plug is a frustum-shaped structure with square ends at both the top and bottom, and the length of its upper end is equal to the opening diameter of the lower end of the supply pipe.

[0022] Compared with the prior art, the present invention provides an automatic alarm and fire extinguishing device for underground coal mines, which has the following beneficial effects:

[0023] In this invention, the walking mechanism is guided on a fixed guide rail, accurately identifies and moves to the fire location using a visual detection mechanism and a thermal imaging mechanism, and moves back and forth as needed during the fire extinguishing process. The control system controls the extension and retraction of the electric push rod and the micro cylinder to ensure that the extinguishing agent is projected on the ground as a square ring that gradually retracts inward. On the one hand, the extinguishing agent forms a cone-shaped fire extinguishing zone in the air to isolate the external air. On the other hand, it can extinguish the internal fire points one by one. When extinguishing the fire at the center fire point, the extinguishing agent is irregularly discharged and extinguishes the fire at the center fire point by reducing the pressure of the pressure valve or extending the guide plug. After the fire is extinguished, the control system controls the walking mechanism to move to a fixed path and then execute the fire extinguishing action again to fully implement the fire extinguishing and improve the fire extinguishing effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an automatic alarm and fire extinguishing device for underground coal mines.

[0025] Figure 2 This is a schematic diagram of the alarm and fire extinguishing components in an automatic alarm and fire extinguishing device for underground coal mines.

[0026] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0027] Figure 4 A schematic diagram of the extinguishing path for a single fire extinguishing nozzle;

[0028] Figure 5 This is a schematic diagram of the fire extinguishing path for the entire set of fire extinguishing nozzles;

[0029] Figure 6 This is a schematic diagram showing the adjustment status of a fire extinguishing nozzle.

[0030] Figure 7 A schematic diagram showing the positional relationship between the guide plug and the fire extinguishing nozzle;

[0031] In the diagram: 1. Fixed guide rail; 2. Traveling mechanism; 3. Supply tank; 4. Alarm and fire extinguishing assembly; 41. Mounting housing; 42. Visual inspection mechanism; 43. Thermal imaging mechanism; 44. Fire extinguishing nozzle; 441. Supply pipe; 442. Side support; 443. Electric push rod; 444. Extension plate; 445. Guide plug; 446. Miniature cylinder; 447. Telescopic shaft. Detailed Implementation

[0032] Please see Figures 1-7 In this embodiment of the invention, an automatic alarm and fire extinguishing device for underground coal mines includes:

[0033] Fixed guide rail 1, which is laid on the top of the coal mine shaft;

[0034] The walking mechanism 2 is movably mounted on the fixed guide rail 1;

[0035] The alarm and fire extinguishing assembly 4 is located below the walking mechanism 2; and

[0036] The supply tanks 3, which are fixedly installed on the upper end of the walking mechanism 2, are multiple tanks arranged side by side, and are used to supply extinguishing agent into the alarm and extinguishing assembly 4.

[0037] In other words, in this embodiment, the walking mechanism 2 patrols and monitors the fixed guide rail 1 at regular intervals. When the alarm and fire extinguishing component 4 detects a fire, the walking mechanism 2 moves to above the edge of the fire source. The alarm and fire extinguishing component 4 then reports the range of the fire source and adjusts to cover or exceed that range. Afterward, the storage tank 3 is activated to supply extinguishing agent to the alarm and fire extinguishing component 4, causing the extinguishing agent to gradually retract in a hollow, cone-shaped manner to extinguish the fire. Figure 4 As shown, after the horizontal fire is extinguished, the control system controls the walking mechanism 2 to move a fixed distance and then performs fire extinguishing operations on the next point, as follows. Figure 5 As shown.

[0038] In a preferred embodiment, the alarm and fire extinguishing components 4 are provided correspondingly to the supply outlets of the supply tanks 3, and their numbers are matched. It should be noted that each supply tank 3 is provided with a pressure valve at the connection point with the alarm and fire extinguishing components 4, which can adjust the pressure of the fire extinguishing agent in the supply tank 3.

[0039] Please see Figure 2 In this embodiment, the alarm and fire extinguishing component 4 includes:

[0040] Mounting housing 41 is movably mounted on the fixed guide rail 1, and a visual inspection mechanism 42 and a thermal imaging mechanism 43 are mounted on the mounting housing 41.

[0041] Fire extinguishing nozzle 44 is disposed within the mounting housing 41;

[0042] It should be explained that the fire extinguishing nozzle 44 is a telescopic structure, which is controlled by the corresponding cylinder.

[0043] In a preferred embodiment, the walking mechanism 2 is also equipped with a control system, which controls the walking mechanism 2 to walk and patrol on the fixed guide rail 1 at regular intervals, and can move to the fire location and adjust the movement state of the fire extinguishing nozzle 44 based on the data feedback from the visual detection mechanism 42 and the thermal imaging mechanism 43.

[0044] Please see Figure 2 , Figure 3 In this embodiment, the fire extinguishing nozzle 44 includes:

[0045] A supply pipe 441 connected to the supply outlet of the storage tank 3;

[0046] A side support 442 is fixed to the mounting housing 41, and four electric push rods 443 are circumferentially fixed on the side support 442;

[0047] There are four extension plates 444 arranged circumferentially. They are rotatably set at the lower end of the supply pipe 441 and are respectively hinged to the four electric push rods 443. Each extension plate 444 has a through hole. The electric push rod 443 can adjust the outward tilt angle of the hollow truncated cone-shaped extinguishing agent.

[0048] There are four miniature cylinders 446 arranged circumferentially, which are fixed inside the mounting shell 41. A telescopic shaft 447 is slidably arranged inside the cylinder, and the telescopic shaft 447 is vertically slidably arranged in the through hole.

[0049] The guide plug 445 is disposed between the four extension plates 444, and its upper end is fixed to the four telescopic shafts 447 respectively. When the pressure of the pressure valve is fixed, the control system can adjust the extension and retraction of the micro cylinder 446 to control the lifting and lowering of the guide plug 445 to indirectly control the pressure of the extinguishing agent.

[0050] It should be noted that the initial movement state is when the cylinder of the fire extinguishing nozzle 44 extends to the point that the extinguishing agent can laterally cover or exceed the fire area in the mine, and the extension plate 444 is parallel to the guide plug 445.

[0051] In a preferred embodiment, telescopic guide plates are provided at the corners of the four extension plates 444, and the lengths of the four extension plates 444 are all the same.

[0052] In actual use, the extension plate 444 and the guide plug 445 work together to allow the extinguishing agent to be sprayed out in a hollow, frustum-shaped manner, forming a cone-shaped fire extinguishing zone to isolate the outside air. As the extinguishing nozzle 44 moves upward, the extinguishing agent gradually retracts to extinguish the fire. Figure 4 As shown in the diagram, taking the diagram as an example, from the outer layer to the center point are 5 recessed layers and an independent center point. Then, from the outside to the inside are layers 1 to 6. During the upward movement of the fire extinguishing nozzle 44, the range of the fire extinguishing agent sprayed is from layers 1 to 5. When extinguishing the fire at the center (i.e., layer 6), by reducing the pressure of the pressure valve or by lowering the guide plug 445 in conjunction with the extension plate 444 deflecting inward, the fire extinguishing agent is discharged in a solid cone shape at the lower end of the guide plug 445 and extinguishes the fire at the center.

[0053] In a preferred embodiment, the guide plug 445 is a frustum-shaped structure with square ends at both the top and bottom, and the length of its upper end is equal to the opening diameter of the lower end of the supply pipe 441.

[0054] It needs to be explained that when the extinguishing agent flows out of the supply pipe 441, it first impacts the guide plug 445. After the miniature cylinder 446 extends and retracts, the inward tilt angle of the extinguishing agent's cone-shaped spray remains unchanged.

[0055] Specifically, taking the four sets of fire extinguishing nozzles 44 as an example, such as Figure 6 , Figure 7 As shown, after the cylinder of the fire extinguishing nozzle 44 extends to the point where the extinguishing agent can laterally cover the continuous fire area in the mine or exceed the fire area, and then the coverage area needs to be adjusted again, the distance difference ΔS between the rear spray projections of the adjusted fire extinguishing nozzle 44 should satisfy the following:

[0056] S1 = 2(H1tanθ + l1tanθ)

[0057] S² = 2(H²tanθ + l²tanθ)

[0058] ΔS=S2-S1

[0059] ΔH=H2-H1

[0060] Δl=l2-l1

[0061] ΔS = 2tanθ(ΔH + Δl)

[0062] H1—Initially, the vertical distance between the supply pipe 441 inside the fire extinguishing nozzle 44 and the ground;

[0063] H2—The vertical distance between the supply pipe 441 inside the fire extinguishing nozzle 44 and the ground after adjusting the fire extinguishing nozzle 44;

[0064] S1—Initially, the distance of the extinguishing agent projected onto the ground by the fire extinguishing nozzle 44;

[0065] S2——The distance of the fire extinguishing agent projected on the ground after adjusting the fire extinguishing nozzle 44;

[0066] θ — the angle at which the extinguishing agent is sprayed;

[0067] ΔH—The amount of extension and retraction of the upper cylinder of the fire extinguishing nozzle component 44;

[0068] Δl — The extension / retraction of the miniature cylinder 446 (the difference in the movement distance of the guide piston 445)

[0069] ΔS——Difference in distance between the projected spray patterns of the adjusted fire extinguishing nozzle 44;

[0070] Among them, the extension and retraction amount ΔH of the upper cylinder of the fire extinguishing nozzle 44 and the extension and retraction amount Δl of the miniature cylinder 446 are real-time monitoring values ​​and are determinable values. After adjustment, it is necessary to keep the distance difference ΔS between the rear spray projections of the fire extinguishing nozzle 44 always 0. Then the control system can control the extension and retraction of the upper cylinder and the miniature cylinder 446 of the fire extinguishing nozzle 44.

[0071] When the extension plate 444 and the guide plug 445 are parallel, after the control system controls the fire extinguishing nozzle 44 to determine the range, if the fire spreads beyond the edge, the electric push rod 443 extends, causing the extension plate 444 to expand, and the area of ​​the fire extinguishing agent on the ground to increase, which can extinguish the fire at the spread point.

[0072] In other words, when the extension plate 444 is expanded and established as the initial state, the distance difference ΔS between the spray projections of the adjusted fire extinguishing nozzle 44 is calculated based on the inner length of the square ring, which is the initial distance S1 of the fire extinguishing nozzle 44 spraying the extinguishing agent onto the ground. At this time, the outer width of the square ring is relatively large, and the overlapping area can be quickly extinguished, followed by retractable extinguishing. When the extension plate 444 and the guide plug 445 are parallel to each other and established as the initial state, the calculation is based on the outer length of the square ring, which is the initial distance S1 of the fire extinguishing nozzle 44 spraying the extinguishing agent onto the ground.

[0073] In addition, taking four sets of fire extinguishing nozzles 44 as an example, when only one side of the fire is extinguished, the control system can control one set of fire extinguishing nozzles 44 on one side, or two adjacent sets of fire extinguishing nozzles 44, or three consecutive sets of fire extinguishing nozzles 44 to be activated according to the fire range.

[0074] In practice, the walking mechanism 2 patrols and monitors the fixed guide rail 1 at regular intervals. When the visual detection mechanism 42 or the thermal imaging mechanism 43 detects a fire, the control system controls the walking mechanism 2 to move above the edge of the fire source. Based on the range of the fire source reported by the visual detection mechanism 42, the control system autonomously adjusts the extension and retraction of the electric push rod 443 and the miniature cylinder 446 to cover the fire extinguishing range in the lateral direction. It also starts the supply tank 3 to supply extinguishing agent to the fire extinguishing nozzle 44, so that the extinguishing agent gradually retracts in a cone shape to extinguish the fire. After the lateral fire is extinguished, the control system controls the walking mechanism 2 to move a fixed distance and then performs the fire extinguishing operation at the next point.

[0075] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic alarm and fire extinguishing device for underground coal mines, characterized in that: It includes: Fixed guide rail (1), which is laid on the top of the coal mine shaft; The walking mechanism (2) is movably mounted on the fixed guide rail (1); An alarm and fire extinguishing assembly (4) is located below the walking mechanism (2); The supply tanks (3) fixedly installed at the upper end of the walking mechanism (2) are multiple in a row, which are used to supply extinguishing agent to the alarm extinguishing assembly (4); The alarm and fire suppression component (4) includes: Mounting housing (41), which is movably mounted on the fixed guide rail (1); Fire extinguishing nozzle (44), which is disposed within the mounting housing (41); The fire extinguishing nozzle (44) includes: A supply pipe (441) is connected to the supply outlet of the supply tank (3). A side support (442) is fixed to the mounting housing (41), and four electric push rods (443) are fixed circumferentially on the side support (442). The extension plates (444) are four in a circumferential arrangement. They are rotatably arranged at the lower end of the supply pipe (441) and are respectively hinged to the four electric push rods (443). Each extension plate (444) has a through hole. The electric push rod (443) can adjust the outward tilt angle of the hollow cone-shaped fire extinguishing agent. The miniature cylinder (446) consists of four circumferentially arranged cylinders, which are fixed inside the mounting shell (41). A telescopic shaft (447) is slidably arranged inside the cylinder, and the telescopic shaft (447) is vertically slidably arranged in the through hole. A guide plug (445) is disposed between the four extension plates (444), and its upper end is fixed to the four telescopic shafts (447) respectively; When the cylinder of the fire extinguishing nozzle (44) is extended to the point where the extinguishing agent can laterally cover the continuous fire area in the mine or be larger than the fire area, and the coverage area needs to be adjusted again, the distance difference between the spray projections of the adjusted fire extinguishing nozzle (44) is... It should meet the following requirements: ； —Initially, the vertical distance between the supply pipe (441) inside the fire extinguishing nozzle (44) and the ground; —The vertical distance between the supply pipe (441) inside the fire extinguishing nozzle (44) and the ground after adjusting the fire extinguishing nozzle (44); —Initially, the distance of the extinguishing agent projected onto the ground by the fire extinguishing nozzle (44); —After adjusting the fire extinguishing nozzle (44), the distance of the fire extinguishing agent projected on the ground by the fire extinguishing nozzle (44); —The angle at which the extinguishing agent is sprayed; —The extension and retraction of the upper cylinder of the fire extinguishing nozzle component (44); — Difference between the extension / retraction of the miniature cylinder block (446) and the travel distance of the guide plug (445); — The distance difference between the spray projections after adjusting the fire extinguishing nozzle (44).

2. The automatic alarm and fire extinguishing device for underground coal mines according to claim 1, characterized in that: The alarm and fire extinguishing components (4) are provided in a manner corresponding to the supply outlets of the storage tank (3), and their numbers are matched.

3. The automatic alarm and fire extinguishing device for underground coal mines according to claim 1, characterized in that: The mounting housing (41) is equipped with a visual inspection mechanism (42) and a thermal imaging mechanism (43).

4. The automatic alarm and fire extinguishing device for underground coal mines according to claim 3, characterized in that: The walking mechanism (2) is also equipped with a control system, which controls the walking mechanism (2) to walk and patrol on the fixed guide rail (1) at regular intervals, and can move to the fire location and adjust the movement state of the fire extinguishing nozzle (44) based on the data feedback from the visual detection mechanism (42) and the thermal imaging mechanism (43).

5. The automatic alarm and fire extinguishing device for underground coal mines according to claim 1, characterized in that: Telescopic guide plates are provided at the corners of the four extension plates (444), and the lengths of the four extension plates (444) are all the same.

6. The automatic alarm and fire extinguishing device for underground coal mines according to claim 1, characterized in that: The guide plug (445) is a frustum-shaped structure with square top and bottom ends, and the length of its upper end is equal to the opening diameter of the lower end of the supply pipe (441).

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