Fire preventing and extinguishing system for coal mine goaf
By setting up multiple sets of foam generating devices and corresponding media supply pipe groups and controllers in the goaf of the coal mine, the problems of low foam spraying efficiency and timeliness were solved, and uniform spraying and efficient fire extinguishing were achieved in the goaf.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CCRI (BEIJING) NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-01-08
- Publication Date
- 2026-04-21
AI Technical Summary
In existing technologies, foam spraying in coal mine goaf areas is inefficient and untimely, resulting in poor fire extinguishing and prevention effects.
Design a fire prevention and extinguishing system for coal mine goaf areas. The system uses multiple foam generating devices that are set up in relation to multiple zones in the goaf area. Combined with a media supply pipeline and controller, it can achieve uniform foam spraying and timely fire extinguishing.
It achieves uniform spraying of foam in the goaf, improves fire extinguishing efficiency, reduces time consumption and saves media consumption.
Smart Images
Figure CN224149623U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mining, specifically to a fire prevention and extinguishing system for coal mine goaf areas. Background Technology
[0002] During the mining process, coal seams may spontaneously combust. In related technologies, foam is sprayed into the goaf to extinguish and prevent fires. However, these technologies use mobile foam generating devices to spray foam into the goaf, which results in low foam spraying efficiency and untimely foam spraying. Utility Model Content
[0003] This utility model aims to at least partially solve one of the technical problems in the related art.
[0004] Therefore, embodiments of this utility model propose a fire prevention and extinguishing system for coal mine goaf areas.
[0005] The coal mine goaf fire prevention and extinguishing system of this utility model embodiment includes:
[0006] Multiple sets of foam generating devices, media supply pipe assemblies, and media supply devices are provided. The multiple sets of foam generating devices are set up one-to-one with multiple zones in the goaf. The media supply devices are connected to the media supply pipe assemblies to supply media to the media supply pipe assemblies. Each foam generating device is connected to the media supply pipe assemblies to obtain the media and generate foam and spray it out. The media supply pipe assemblies are equipped with a main valve corresponding to each set of foam generating devices. The main valve controls the on / off connection between the corresponding set of foam generating devices and the media supply pipe assemblies.
[0007] In some embodiments, each group of foam generating devices includes multiple foam generating devices, and the medium supply pipe group is also provided with a secondary valve. Along the medium flow direction in the medium supply pipe group, each main valve is provided with multiple secondary valves that correspond one-to-one with the multiple foam generating devices. The secondary valves control the connection and disconnection between the corresponding foam generating device and the medium supply pipe group.
[0008] In some embodiments, the coal mine goaf fire prevention and extinguishing system further includes a controller, the controller having a first switch and / or a second switch, the first switch being configured and electrically connected to the main valve in a one-to-one correspondence, the first switch controlling the opening and closing of the corresponding main valve to control the start and stop of the medium supply to the corresponding set of foam generating devices, the second switch being configured and electrically connected to the auxiliary valve in a one-to-one correspondence, the second switch controlling the opening and closing of the corresponding auxiliary valve to control the start and stop of the medium supply to the corresponding foam generating device.
[0009] In some embodiments, the media supply pipe assembly includes a main pipe, a main pipe, and auxiliary pipes. The inlet end of the main pipe is connected to the media supply device, and the outlet end of the main pipe is connected in parallel to the inlet ends of multiple main pipes. Each main pipe is provided with a corresponding main valve, and the outlet end of the main pipe is connected in parallel to the inlet ends of multiple auxiliary pipes. Each auxiliary pipe is provided with a corresponding auxiliary valve, and the outlet end of each auxiliary pipe is connected to a corresponding foam generating device.
[0010] In some embodiments, the media supply assembly includes a liquid supply assembly and a gas supply assembly, both of which are connected to each of the foam generating devices. The foam generating devices receive liquid media supplied by the liquid supply assembly and gaseous media supplied by the gas supply assembly to generate foam and spray it out.
[0011] In some embodiments, the medium supply device includes a liquid mixing tank and a pump station. The liquid mixing tank is connected to the pump station to supply the liquid medium to the pump station. The pump station is connected to the liquid supply pipe group and the gas supply pipe group to supply the liquid medium to the liquid supply pipe group and the gas supply pipe group.
[0012] In some embodiments, the foam generating device includes a housing, a nozzle, and a foaming net. The inlet end of the housing is provided with a first interface and a second interface. The first interface is connected to the liquid supply pipe assembly, and the second interface is connected to the air supply pipe assembly. The outlet end of the housing is provided with the nozzle, and the foaming net is provided inside the housing.
[0013] In some embodiments, the nozzle is a flat nozzle.
[0014] In some embodiments, the foam generating device is mounted on a hydraulic support at the coal face and is positioned toward the goaf.
[0015] In some embodiments, both the media supply pipe assembly and the media supply device are located within the tunnel.
[0016] This embodiment of the coal mine goaf fire prevention and extinguishing system features multiple sets of foam generating devices corresponding to multiple zones within the goaf. Each set of foam generating devices sprays foam onto its corresponding zone, ensuring uniform foam distribution and achieving a superior fire extinguishing and prevention effect. Furthermore, because the foam generating devices are corresponding to the goaf, they can immediately spray foam into the goaf during operation for timely fire extinguishing and prevention. Simultaneously, each set of foam generating devices sprays foam onto multiple zones, reducing the time required for foam spraying and achieving higher efficiency, while also saving on the amount of foam-generating medium used. Attached Figure Description
[0017] Figure 1This is a schematic diagram of a coal mine goaf fire prevention and extinguishing system according to an embodiment of the present invention;
[0018] Figure 2 This is a partial schematic diagram of a coal mine goaf fire prevention and extinguishing system according to an embodiment of the present invention;
[0019] Figure 3 This is a schematic diagram of the foam generating device of the coal mine goaf fire prevention and extinguishing system according to an embodiment of this utility model.
[0020] Figure label:
[0021] 1. Foam generating device; 11. Housing; 12. Nozzle; 13. First port; 14. Second port;
[0022] 2. Medium supply piping assembly; 21. Main valve; 21A. First main valve; 21B. Second main valve; 22. Main pipe; 22A. First main pipe; 22B. Second main pipe; 23. Main pipe; 23A. First main pipe; 23B. Second main pipe; 24. Auxiliary pipe; 24A. First auxiliary pipe; 24B. Second auxiliary pipe; 25. Liquid supply piping assembly; 26. Gas supply piping assembly;
[0023] 3. Media supply device;
[0024] 4. Alleyway. Detailed Implementation
[0025] The embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0026] like Figures 1-3 As shown, the coal mine goaf fire prevention and extinguishing system of this utility model embodiment includes multiple foam generating devices 1, media supply pipe group 2 and media supply device 3.
[0027] Multiple sets of foam generating devices 1 are installed one-to-one with multiple zones in the goaf. For example, as Figure 1 As shown, the goaf extends in the left and right direction, and multiple sets of foam generating devices 1 are arranged in sequence in the left and right direction. Each section of the goaf is equipped with a corresponding set of foam generating devices 1.
[0028] The media supply device 3 is connected to the media supply pipe assembly 2 to supply media to the media supply pipe assembly 2. Each foam generating device 1 is connected to the media supply pipe assembly 2 to obtain media, thereby generating foam and spraying it out to the corresponding zone.
[0029] The media supply pipe assembly 2 is equipped with a main valve 21 corresponding to each group of foam generating devices 1. In other words, the media supply pipe assembly 2 is equipped with multiple main valves 21, and the multiple main valves 21 are configured one-to-one with multiple groups of foam generating devices 1. The main valve 21 controls the on / off connection between the corresponding group of foam generating devices 1 and the media supply pipe assembly 2, thereby controlling the start and stop of the media supply to the foam generating devices 1.
[0030] When using the fire prevention and extinguishing system in the goaf of a coal mine, the main valve 21 corresponding to the zone that needs to be sprayed with foam is opened, and the medium supply device 3 supplies the medium to the foam generating device 1 through the medium supply pipe group 2. The medium generates foam in the foam generating device 1 and sprays it out to the corresponding zone through the foam generating device 1, thereby extinguishing and preventing fire in the goaf.
[0031] It should be noted that when spraying foam, depending on the fire extinguishing and fire prevention needs of the goaf area, all or some of the main valves 21 can be opened.
[0032] This embodiment of the coal mine goaf fire prevention and extinguishing system features multiple sets of foam generating devices corresponding to multiple zones within the goaf. Each set of foam generating devices sprays foam onto its corresponding zone, ensuring uniform foam distribution and achieving a superior fire extinguishing and prevention effect. Furthermore, because the foam generating devices are corresponding to the goaf, they can immediately spray foam into the goaf during operation for timely fire extinguishing and prevention. Simultaneously, each set of foam generating devices sprays foam onto multiple zones, reducing the time required for foam spraying and achieving higher efficiency, while also saving on the amount of foam-generating medium used.
[0033] In some embodiments, each group of foam generating devices 1 includes multiple foam generating devices 1, and the medium supply pipe group 2 is also provided with a secondary valve (not shown in the figure). Along the medium flow direction in the medium supply pipe group 2, each main valve 21 has multiple secondary valves downstream that correspond one-to-one with multiple foam generating devices 1. The secondary valves control the on / off state of the corresponding foam generating device 1 and the medium supply pipe group 2.
[0034] like Figure 1 As shown, each group of foam generating devices 1 includes multiple foam generating devices 1, which are preferably, but not limited to, arranged in the left-right direction.
[0035] The medium supply pipe group 2 is also equipped with multiple sets of auxiliary valves, which are arranged one-to-one with multiple main valves 21 and are located downstream of the corresponding main valves 21 along the flow direction of the medium in the medium supply pipe group 2. Each set of auxiliary valves includes multiple auxiliary valves. Downstream of each main valve 21, multiple auxiliary valves are arranged one-to-one with multiple foam generating devices 1, and the auxiliary valves are located between the main valves 21 and the corresponding foam generating devices 1.
[0036] Each group of foam generating devices 1 includes multiple foam generating devices 1 to ensure that the foam is fully covered within the zone. During use, the main valve 21 can control the synchronous start and stop of the medium supply of multiple foam generating devices 1 in the corresponding group to quickly control whether foam is sprayed in the zone. When the main valve 21 is open, the auxiliary valve can control the start and stop of the medium supply of the corresponding foam generating device 1. Thus, by controlling the number and position of the foam generating devices 1 in the same group, the uniform spraying of foam in the zone is further ensured. At the same time, each foam generating device 1 is equipped with a corresponding auxiliary valve, which can also facilitate the closing of the foam generating device 1 for disassembly and maintenance.
[0037] In some embodiments, the coal mine goaf fire prevention and extinguishing system of this utility model further includes a controller (not shown in the figure). The controller has a first switch and / or a second switch. The first switch is configured and electrically connected to the main valve 21 in a one-to-one correspondence. The first switch controls the opening and closing of the corresponding main valve 21 to control the start and stop of the medium supply of the corresponding set of foam generating devices 1. The second switch is configured and electrically connected to the auxiliary valve in a one-to-one correspondence. The second switch controls the opening and closing of the corresponding auxiliary valve to control the start and stop of the medium supply of the corresponding foam generating device 1.
[0038] Specifically, the controller has a first switch that corresponds to each of the main valves 21. The first switch is, for example, a push switch or a gate switch. The first switch is electrically connected to the corresponding main valve 21, which can be wired or wireless. The first switch is triggered by pushing or pressing to control the opening and closing of the corresponding main valve 21, thereby quickly controlling the start and stop of the medium supply of the corresponding set of foam generating devices 1.
[0039] The controller also has a second switch that corresponds to each of the auxiliary valves. The second switch is, for example, a push switch or a gate switch. The second switch is electrically connected to the corresponding auxiliary valve, which can be wired or wireless. The second switch is triggered by pushing or pressing to control the opening and closing of the corresponding auxiliary valve, so that when the corresponding main valve 21 is opened, the start and stop of the medium supply of the corresponding foam generator 1 can be quickly controlled.
[0040] The controller can be a wireless controller or a wired controller. When the controller is a wired controller, it is preferred, but not limited to, being arranged side by side with the media supply device 3.
[0041] Understandably, the controller may also have only a first switch and a second switch for manual control, or it may have only a second switch and a first switch for manual control.
[0042] In some embodiments, the media supply pipe assembly 2 includes a main pipe 22, a main pipe 23, and a secondary pipe 24. The inlet end of the main pipe 22 is connected to the media supply device 3. The outlet end of the main pipe 22 is connected in parallel to the inlet ends of multiple main pipes 23. Each main pipe 23 is provided with a corresponding main valve 21. The outlet end of the main pipe 23 is connected in parallel to the inlet ends of multiple secondary pipes 24. Each secondary pipe 24 is provided with a corresponding secondary valve. The outlet end of each secondary pipe 24 is connected to a corresponding foam generating device 1.
[0043] like Figure 1 and Figure 2 As shown, the medium supply device 3 is connected to the inlet end of the main pipe 22. The outlet end of the main pipe 22 is connected in parallel to the inlet ends of multiple main pipes 23. The outlet end of each main pipe 23 is connected in parallel to the inlet ends of multiple secondary pipes 24. The outlet end of each secondary pipe 24 is connected to the corresponding foam generating device 1. The medium supplied by the medium supply device 3 enters the corresponding foam generating device 1 through the main pipe 22, main pipes 23 and secondary pipes 24.
[0044] Each main pipe 23 is equipped with a corresponding main valve 21. The main valve 21 controls the opening and closing of multiple downstream secondary pipes 24 and the main pipe 22, thereby controlling the synchronous start and stop of the medium supply of multiple foam generating devices 1 in a corresponding group.
[0045] Each secondary pipe 24 is equipped with a corresponding secondary valve, which controls the opening and closing of the foam generating device 1 and the main pipe 23 connected to it, thereby controlling the start and stop of the medium supply to the corresponding foam generating device 1.
[0046] In some embodiments, the medium supply pipe assembly 2 includes a liquid supply pipe assembly 25 and a gas supply pipe assembly 26, both of which are connected to each foam generating device 1. The foam generating device 1 receives the liquid medium supplied by the liquid supply pipe assembly 25 and the gaseous medium supplied by the gas supply pipe assembly 26 to generate foam and spray it out.
[0047] like Figure 1 and Figure 2 As shown, the medium supply pipe assembly 2 includes a liquid supply pipe assembly 25 and a gas supply pipe assembly 26. The liquid supply pipe assembly 25 is connected between the medium supply device 3 and the foam generating device 1 to supply the liquid medium supplied by the medium supply device 3 into the foam generating device 1. The gas supply pipe assembly 26 is connected between the medium supply device 3 and the foam generating device 1 to supply the gaseous medium supplied by the medium supply device 3 into the foam generating device 1. The foam generating device 1 receives the liquid medium and the gaseous medium to generate foam and spray it out.
[0048] Both the liquid supply pipe assembly 25 and the gas supply pipe assembly 26 include a main pipe 22, a main pipe 23, a secondary pipe 24, a main valve 21, and a secondary valve. The main pipe 22, main pipe 23, secondary pipe 24, main valve 21, and secondary valve of the liquid supply pipe assembly 25 are referred to as the first main pipe 22A, the first main pipe 23A, the first secondary pipe 24A, the first main valve 21A, and the first secondary valve A. The main pipe 22, main pipe 23, secondary pipe 24, main valve 21, and secondary valve of the gas supply pipe assembly 26 are referred to as the second main pipe 22B, the second main pipe 23B, the second secondary pipe 24B, the second main valve 21B, and the second secondary valve B.
[0049] The medium supply device 3 is connected to the inlet end of the first main pipe 22A and the inlet end of the second main pipe 22B.
[0050] The outlet end of the first main pipe 22A is connected in parallel to the inlet end of multiple first main pipes 23A. The outlet end of each first main pipe 23A is connected in parallel to the inlet end of multiple first secondary pipes 24A. The outlet end of each first secondary pipe 24A is connected to the corresponding foam generating device 1. The liquid medium supplied by the medium supply device 3 enters the corresponding foam generating device 1 through the first main pipe 22A, the first main pipe 23A and the first secondary pipe 24A.
[0051] Each first main pipe 23A is equipped with a corresponding first main valve 21A. The first main valve 21A controls the opening and closing of multiple first secondary pipes 24A downstream of it and the first main pipe 22A, thereby controlling the synchronous start and stop of the liquid medium supply of multiple foam generating devices 1 in a corresponding group.
[0052] Each first auxiliary pipe 24A is equipped with a corresponding first auxiliary valve. The first auxiliary valve controls the opening and closing of the foam generating device 1 and the first main pipe 23A connected to it, thereby controlling the start and stop of the liquid medium supply to the corresponding foam generating device 1.
[0053] The outlet of the second main pipe 22B is connected in parallel to the inlet of multiple second main pipes 23B. The outlet of each second main pipe 23B is connected in parallel to the inlet of multiple second auxiliary pipes 24B. The outlet of each second auxiliary pipe 24B is connected to a corresponding foam generating device 1. The gaseous medium supplied by the medium supply device 3 enters the corresponding foam generating device 1 through the second main pipe 22B, the second main pipes 23B, and the second auxiliary pipes 24B. Each second main pipe 23B is equipped with a corresponding second main valve 21B, and each second auxiliary pipe 24B is equipped with a corresponding second auxiliary valve.
[0054] Each second main pipe 23B is equipped with a corresponding second main valve 21B. The second main valve 21B controls the opening and closing of multiple second auxiliary pipes 24B downstream of it and the second main pipe 22B, thereby controlling the synchronous start and stop of the gaseous medium supply of multiple foam generating devices 1 in a corresponding group.
[0055] Each secondary pipe 24B is equipped with a corresponding secondary valve, which controls the on / off state of the foam generating device 1 and the secondary main pipe 23B connected to it, thereby controlling the start and stop of the gaseous medium supply to the corresponding foam generating device 1.
[0056] The first switch is electrically connected to the first main valve 21A and the second main valve 21B corresponding to the same group of foam generating devices 1, so as to simultaneously control the opening and closing of the first main valve 21A and the second main valve 21B. The second switch is electrically connected to the first auxiliary valve A and the second auxiliary valve B corresponding to the same group of foam generating devices 1, so as to simultaneously control the opening and closing of the first auxiliary valve A and the second auxiliary valve B. When the first main valve 21A, the second main valve 21B, the first auxiliary valve A and the second auxiliary valve B upstream of the foam generating device 1 are all open, the foam generating device 1 is activated and sprays foam. When any one of the first main valve 21A, the second main valve 21B, the first auxiliary valve A and the second auxiliary valve B upstream of the foam generating device 1 is closed, the foam generating device 1 does not generate or spray foam.
[0057] The liquid medium is preferably a liquid inhibitor, and the gaseous medium is preferably compressed air.
[0058] The system is equipped with liquid supply pipes and gas supply pipes to supply liquid and gaseous media to the foam generator, respectively. Both liquid and gaseous media have high quality when they enter the foam generator, enabling the foam generator to produce and spray high-quality foam, ensuring the uniformity of foam in the goaf area, and giving the coal mine goaf fire prevention and extinguishing system excellent fire extinguishing and fire prevention effects.
[0059] It is understood that the media supply pipe assembly is not limited to including liquid supply pipe assembly and gas supply pipe assembly. In other embodiments, liquid media and gaseous media are supplied into the same media supply pipe assembly and supplied to the foam generating device. Then, the liquid media and gaseous media generate foam in the foam generating device and spray it out. When both the main valve and the auxiliary valve upstream of the foam generating device are open, the foam generating device is turned on and sprays foam. When the main valve or the auxiliary valve upstream of the foam generating device is closed, the foam generating device does not generate and spray foam.
[0060] In some embodiments, the media supply device 3 includes a liquid mixing tank (not shown) and a pump station (not shown). The liquid mixing tank is connected to the pump station to supply liquid media to the pump station. The pump station is connected to a liquid supply pipe group 25 and a gas supply pipe group 26 to supply liquid media to the liquid supply pipe group 25 and gas supply pipe group 26.
[0061] Specifically, the medium supply device 3 includes a liquid preparation tank and a pump station. The liquid preparation tank is used to prepare liquid media. Preferably, the liquid preparation tank has a stirrer to stir and prepare the liquid media. The pump station has a liquid media inlet and a gaseous media inlet. The liquid media inlet is connected to the liquid preparation tank, and the gaseous media inlet is connected to the atmospheric environment. The pump station also has a liquid media outlet and a gaseous media outlet. The liquid media outlet is connected to the inlet end of the first main pipe 22A to pump the liquid media into the first main pipe 22A. The gaseous media outlet is connected to the inlet end of the second main pipe 22B to pump the gaseous media formed by the pump station to the second main pipe 22B.
[0062] In such Figure 1 In the specific example shown, both the medium supply pipe group 2 and the medium supply device 3 are located in the roadway 4, and the medium supply device 3 is preferably located in the air intake roadway.
[0063] In some embodiments, the foam generating device 1 includes a housing 11, a nozzle 12 and a foaming net (not shown in the figure). The inlet end of the housing 11 is provided with a first interface 13 and a second interface 14. The first interface 13 is connected to a liquid supply pipe group 25, and the second interface 14 is connected to an air supply pipe group 26. The outlet end of the housing 11 is provided with a nozzle 12, and a foaming net is provided inside the housing 11.
[0064] like Figure 3 As shown, the foam generating device 1 includes a housing 11. The left end of the housing 11 serves as the inlet end and is provided with a first interface 13 and a second interface 14. The first interface 13 is connected to the outlet end of the first secondary pipe 24A, and the second interface 14 is connected to the outlet end of the second secondary pipe 24B. The right end of the housing 11 serves as the outlet end and is provided with a nozzle 12. A foaming net is provided inside the housing 11, and the foaming net is located between the first interface 13 and the second interface 14 and the nozzle 12.
[0065] In use, the liquid medium enters the foam generating device 1 through the first interface 13, and the gaseous medium enters the foam generating device 1 through the second interface 14. Both the liquid and gaseous media move toward the nozzle 12. During the movement, the liquid and gaseous media pass through the foaming net and mix to produce foam. The foam moves toward the nozzle 12 and is sprayed out by the nozzle 12.
[0066] In such Figure 3 In the specific example shown, nozzle 12 is a flat nozzle 12, which has a larger spray area and sprays foam evenly into the goaf.
[0067] In some embodiments, the foam generating device 1 is installed on the hydraulic support of the coal mining face and faces the goaf. This facilitates the installation of the foam generating device 1 and reduces the installation difficulty and structural complexity of the coal mine goaf fire prevention and extinguishing system, while ensuring that the foam generating device 1 can spray foam into the goaf in a timely manner.
[0068] In the description of this utility model, it should be understood that the terms "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0069] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0071] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0072] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0073] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A coal mine goaf fire prevention and extinguishing system, characterized in that, include: Multiple sets of foam generating devices (1), media supply pipe groups (2) and media supply devices (3) are provided. The multiple sets of foam generating devices (1) are set one-to-one with multiple zones of the goaf. The media supply devices (3) are connected to the media supply pipe groups (2) to supply media to the media supply pipe groups (2). Each foam generating device (1) is connected to the media supply pipe group (2) to obtain the media and generate foam and spray it out from the flat nozzle (12). The media supply pipe group (2) is provided with a main valve (21) corresponding to each set of foam generating devices (1). The main valve (21) controls the opening and closing of the corresponding set of foam generating devices (1) and the media supply pipe group (2). The media supply pipe assembly (2) includes a main pipe (22), a main pipe (23), a secondary pipe (24), a liquid supply pipe assembly (25), and a gas supply pipe assembly (26). The inlet end of the main pipe (22) is connected to the media supply device (3). The outlet end of the main pipe (22) is connected in parallel to the inlet ends of multiple main pipes (23). Each main pipe (23) is provided with a corresponding main valve (21). The outlet end of the main pipe (23) is connected in parallel to the inlet ends of multiple secondary pipes (24). Each secondary pipe (24) is provided with a corresponding secondary valve. The outlet end of each secondary pipe (24) is connected to a corresponding foam generating device (1). The liquid supply pipe assembly (25) and the gas supply pipe assembly (26) are both connected to each foam generating device (1). The foam generating device (1) obtains the liquid medium supplied by the liquid supply pipe assembly (25) and the gas medium supplied by the gas supply pipe assembly (26) to generate foam and spray it out. The foam generating device (1) is installed on the hydraulic support of the coal mining face and faces the goaf. The medium supply pipe assembly (2) and the medium supply device (3) are both located in the roadway (4), and the medium supply device (3) is located in the air intake roadway.
2. The coal mine goaf fire prevention and extinguishing system according to claim 1, characterized in that, Each set of foam generating devices (1) includes multiple foam generating devices (1). The medium supply pipe group (2) is also provided with auxiliary valves. Along the medium flow direction in the medium supply pipe group (2), each main valve (21) has multiple auxiliary valves downstream that correspond one-to-one with multiple foam generating devices (1). The auxiliary valves control the on / off state of the corresponding foam generating device (1) and the medium supply pipe group (2).
3. The coal mine goaf fire prevention and extinguishing system according to claim 2, characterized in that, It also includes a controller having a first switch and / or a second switch. The first switch is configured and electrically connected to the main valve (21) in a one-to-one correspondence. The first switch controls the opening and closing of the corresponding main valve (21) to control the start and stop of the medium supply to the corresponding set of foam generating devices (1). The second switch is configured and electrically connected to the auxiliary valve in a one-to-one correspondence. The second switch controls the opening and closing of the corresponding auxiliary valve to control the start and stop of the medium supply to the corresponding foam generating device (1).
4. The coal mine gob area fire prevention and extinguishing system according to any one of claims 1-3, characterized in that, The medium supply device (3) includes a liquid mixing tank and a pump station. The liquid mixing tank is connected to the pump station to supply the liquid medium to the pump station. The pump station is connected to the liquid supply pipe group (25) and the gas supply pipe group (26) to supply the liquid medium to the liquid supply pipe group (25) and the gas supply pipe group (26).
5. The coal mine gob area fire prevention and extinguishing system according to any one of claims 1-3, characterized in that, The foam generating device (1) includes a housing (11) and a foaming net. The inlet end of the housing (11) is provided with a first interface (13) and a second interface (14). The first interface (13) is connected to the liquid supply pipe group (25), and the second interface (14) is connected to the air supply pipe group (26). The outlet end of the housing (11) is provided with the flat nozzle (12), and the foaming net is provided inside the housing (11).