Fire-fighting water sprinkling, collecting and distributing device for underground coal mine working face

Abstract

The utility model discloses a coal mine underground working face fire-fighting water sprinkling, collecting and distributing device which comprises a water collecting and distributing device, the water collecting and distributing device is connected with two water collecting pipes and three water distributing pipes, and the water distributing pipes are connected with the water collecting pipes and the water distributing pipes. By arranging the water collecting and distributing device, pipelines are respectively led from the main transportation roadway and the auxiliary transportation roadway to supply water, and two water sources are supplied to the working face; meanwhile, branch pipes are led out of the crossheads of the working face to supply water, and independent control valves are arranged, so that overall and local maintenance is not affected when a single branch pipe breaks down, water use of other parts is not affected, water supply needed by fire fighting and water sprinkling of the crossheads of the working face according to pressure can be achieved, and single pipeline can be detached and recycled when the coal face retracts; normal work of other pipelines is not affected, it can be guaranteed that the air flow purification water curtain in the air return crossheading is always kept in the optimal working state, and flying dust in underground air is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine production, in particular to a fire-fighting sprinkler water collection and distribution device for the working face in the coal mine Background Technique

[0002] Underground fire-fighting and sprinkler projects are an indispensable part of the construction of modern coal mines. Underground fire-fighting and sprinkler systems play an irreplaceable role in the dust prevention work of the working face and roadway; underground fire-fighting and sprinkler systems are currently the best technical choice to reduce coal dust interference and protect the health of workers. At the same time, it is also a requirement for implementing the "Regulations on the Prevention and Control of Occupational Hazards in Coal Mine Workplaces" (Order No. 73 of the State Administration of Work Safety Supervision and Management). From the perspective of engineering economy, using sprinkler dust removal and fire prevention and extinguishing is the most economical

[0003] The working face is the largest dust-producing point and the most prone to fire in the coal mine underground. The main measures to suppress coal dust during the excavation process of the working face are to pre-inject water into the coal body of the longwall face; at the same time, an air flow purification water curtain is installed in the return airway of the working face to capture fine flying dust in the air. In order to extinguish the fire on the working face in a timely manner, fire hydrants are set every 50m in the main transportation gateway and auxiliary transportation gateway of the working face; fire hydrants are set every 100m in the return airway of the working face

[0004] In order to reduce the water supply accident rate and delay rate of the coal mining face in modern coal mines, the existing common design method should be changed, and the water supply sources for each gateway of the coal mining face should be more than two; and it is necessary to ensure that the distribution water pipes of each gateway do not interfere with each other. For this reason, a fire-fighting sprinkler water collection and distribution device for the working face in the coal mine is proposed Content of the Utility Model

[0005] The purpose of the utility model is to provide a fire-fighting sprinkler water collection and distribution device for the working face in the coal mine to solve the problems raised in the above background technique

[0006] In order to solve the above technical problems, the utility model provides the following technical solution: a fire-fighting sprinkler water collection and distribution device for the working face in the coal mine, including a water collection and distribution device, the water collection and distribution device is connected with a water collection pipe and a distribution water pipe, wherein, the number of water collection pipes is two, and the number of distribution water pipes is three

[0007] According to the above technical solution, the water collection and distribution device is fixed by a channel steel support, and a mine-used resin bolt is arranged at the bottom of the channel steel support

[0008] According to the above technical solution, the water collection pipe and the distribution water pipe are respectively connected with the water collection and distribution device through a transition three-way joint

[0009] According to the above technical solution, gate valves are respectively arranged on the pipelines connected with the water collection and distribution device

[0010] According to the above technical solution, a proportional pressure reducing valve and a filter are provided on the pipeline connected to the water collecting pipe.

[0011] According to the above technical solution, an adjustable pressure reducing valve is provided on the water distribution pipe.

[0012] According to the above technical solution, a safety valve is connected to the water collecting and distributing device, and pressure gauges are respectively connected to the water collecting and distributing device and the water distribution pipe.

[0013] According to the above technical solution, the transition tee includes loose flanges, and is respectively connected to the water collecting pipe, the water distribution pipe and the water collecting and distributing device through the loose flanges.

[0014] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: (1) The water supply guarantee rate is increased. At the current stage, each crossheading in the working face takes water from the underground fire fighting and sprinkler pipelines in the roadway nearby. In fact, it is a dendritic pipe network with a low guarantee rate. The water collecting and distributing device is set to realize water supply by respectively leading pipelines from the main haulage roadway and the auxiliary haulage roadway, so that there are two water sources for water supply to the working face. At the same time, branch pipes are respectively led out from each crossheading in the working face for water supply and independent control valves are set, so that the failure of a single branch pipe does not affect the overall situation and local maintenance does not affect the water use of other parts.

[0015] (2) Based on the actual working conditions, it is summarized that the working pressure of the underground fire fighting and sprinkler pipelines in the main haulage crossheading of the working face is relatively moderate at 1.0 MPa; the working pressure of the underground fire fighting and sprinkler pipelines in the auxiliary haulage crossheading of the working face is relatively moderate at 0.6 MPa; the working pressure of the underground fire fighting and sprinkler pipelines in the return air crossheading of the working face is relatively moderate at 1.2 MPa. Through the water collecting and distributing device, overall pressure reduction is first carried out and then secondary pressure regulation is carried out; it can realize the supply of fire fighting and sprinkler water to each crossheading in the working face according to the pressure requirements.

[0016] (3) It matches the production system of intermittent advancement of the working face. During the actual production process of the coal mine, the working face is constantly mining and withdrawing (advancing inward). Therefore, every three days or so, the fire fighting and sprinkler pipelines in each crossheading need to be withdrawn (dismantled and recycled) along with the working face. The present utility model can realize the disassembly and recycling of single pipelines when the coal mining working face is withdrawn, without affecting the normal operation of other pipelines, and can ensure that the air flow purification water curtain in the return air crossheading always maintains the optimal working state, reducing the flying dust in the underground air.

[0017] It can be seen that through the water collecting and distributing device and the functional equipment arranged on the water collecting and distributing pipes, the present utility model realizes the centralized supply of fire fighting and sprinkler water to the working face, and at the same time, secondary pressure regulation can be carried out on the water distribution pipe according to different water supply pressure requirements. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0019] Figure 1 is the front view structural schematic diagram of the present utility model;

[0020] Figure 2 is the left view structural schematic diagram of the present utility model;

[0021] In the figure: 1 - water collection and distribution device, 2 - safety valve, 3 - pressure gauge, 4 - transition tee, 41 - loose flange, 5 - proportional reducing valve, 6 - gate valve, 7 - filter, 8 - adjustable reducing valve, 9 - channel steel support, 10 - mine resin bolt. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1-2 , the present utility model provides a technical solution: a water collection and distribution device for fire sprinkling in a coal mine underground working face, including a water collection and distribution device 1, which is assembled and welded by a seamless steel pipe straight cylinder, a customized head, a water collection and distribution short pipe, and a pipe flange according to the figure. After welding, all outlet flanges are blocked with blind flanges for a pressure test, and the test pressure is 1.5 times its working pressure. The water collection and distribution device 1 is connected with a water collection pipe and a water distribution pipe. Among them, the number of water collection pipes is two, and the number of water distribution pipes is three;

[0024] Specifically, the water collection and distribution device 1 is fixed by a channel steel support 9. The bottom of the channel steel support 9 is provided with a mine resin bolt 10. The channel steel support 9 is made of channel steel, and bolt holes are opened on the base channel steel for fixing the channel steel support 9 to the floor. The base channel steel is buried in the groove opened in the roadway floor. Since the roadway light is insufficient, this treatment is to avoid tripping workers. The channel steel support 9 and the water collection and distribution device 1 are fixed together with a "U" - shaped pipe clamp to support the water collection and distribution device 1. The channel steel support 9 is a consumable material and should be remade according to actual conditions in the next working face.

[0025] The mine resin bolt 10 is a national standard product and can be purchased in the market. There are medicine bags of two components A and B at the top of the mine resin bolt. After calibrating the bolt vertically, rotate the bolt to break and mix the medicine bags of components A and B. The medicine will react quickly to form an expanded solid resin, firmly fixing the bolt on the floor bolt hole;

[0026] Specifically, the water collecting pipe and the water distribution pipe are respectively connected to the water collecting and distributing device 1 through a transition tee 4. The transition tee 4 sets the elevation according to the actual situation of the niches already constructed in the roadway, for two water collecting pipes and three water distribution pipes, as well as the dimensions of the functional equipment on the fabricated water collecting and distributing device, water collecting pipe and water distribution pipe. The dimensions of the transition tees for each pipe are determined through measurement. The transition tee 4 is assembled and welded by seamless steel pipes;

[0027] Specifically, gate valves 6 are respectively installed on the pipelines connected to the water collecting and distributing device 1. The gate valves 6 are national standard products and can be purchased in the market. The nominal pressure of the gate valves 6 is determined according to the working pressure of the pipeline where they are located;

[0028] Specifically, a proportional pressure reducing valve 5 and a filter 7 are installed on the pipeline connected to the water collecting pipe. The filter 7 is a national standard product and can be purchased in the market. It is required that both the shell and the filter screen of the filter 7 are made of stainless steel products, and the precision of the filter screen is 50 meshes. The proportional pressure reducing valve 5 is a national standard product and can be purchased in the market. The proportional pressure reducing valve 5 can only be installed vertically and reduces pressure proportionally. (The selection range of the pressure reduction ratio is 2:1, 3:1, 4:1, suitable for primary centralized pressure reduction) The pressure reduction ratio of the proportional pressure reducing valve 5 is determined according to the pressure required by the air flow purification water curtain at the return air heading of the working face, and it is necessary to ensure that the pressure after being reduced by the proportional pressure reducing valve 5 is greater than the calculated required pressure, leaving the excess pressure for secondary pressure reduction treatment;

[0029] Specifically, an adjustable pressure reducing valve 8 is installed on the water distribution pipe. The adjustable pressure reducing valve 8 is a national standard product and can be purchased in the market. The reason for selecting the adjustable pressure reducing valve 8 here is precisely because it can be installed horizontally, and the pressure after the pressure reducing valve can be adjusted by rotating its adjusting screw, and the adjusting screw is rotated accordingly according to the reading of the pressure gauge behind the valve.

[0030] Specifically, a safety valve 2 is connected to the water collecting and distributing device 1, and pressure gauges 3 are respectively connected to the water collecting and distributing device 1 and the water distribution pipe. The safety valve 2 is a national standard product and can be purchased in the market. The operating pressure of the safety valve 2 is selected according to the pressure of the water collecting pipe (or determined by back-calculating based on the pressure at the water distribution point). The inlet end of the safety valve 2 is welded to a blind flange with a central hole, and then tightly connected to the flange on the short pipe of the safety valve connection reserved on the water collecting and distributing device 1.

[0031] The pressure gauge 3 is a national standard product and can be purchased in the market. The range of the pressure gauge 3 is selected according to the pressure in the water collecting and distributing device and each water distribution pipe. The inlet end of the pressure gauge 3 is welded to a blind flange with a central hole, and then tightly connected to the flange on the connection reserved on the water collecting and distributing device 1 and each water distribution pipe.

[0032] Specifically, the transition tee 4 includes a loose flange 41. The loose flange 41 is connected to the water collecting pipe, the water distribution pipe, and the water collecting and distributing device 1 respectively. The reason for using the loose flange is that welding is not allowed underground in coal mines (especially high-gas coal mines). When the flange on the functional equipment installed on the water collecting and distributing pipe is secondarily butted with the transition tee 4, the flange of the loose flange can rotate and accurately align with the position of the flange holes on the functional equipment, and the installation angle deviation can be adjusted by fixing with bolts, thus solving the problem of flexible compensation. It is designed in the form of a tee instead of using a 90° elbow in order to set two fixed brackets to achieve a straight line between two points and use the fixed brackets to offset the pressure load.

[0033] When installing the utility model: 1. 30 days before the working face has production conditions, according to the actual situation of the niches already constructed beside the roadway, set the elevation with red calibration lines according to the two water collecting pipes and three water distribution pipes. Determine the dimensions of the transition tees of each pipe through measurement based on the dimensions of the water collecting and distributing device, the water collecting pipes, and the functional equipment purchased on the water distribution pipes. Fabricate the transition tees 4 of each pipe in the ground machine repair shop. Use a mine car to transport the transition tees 4 of the pipes, the water collecting and distributing device 1, and the functional equipment purchased on the water collecting pipes and water distribution pipes to the niches.

[0034] 2. Groove according to the channel steel bracket 9 in the niche, fix points according to the positions of the bolt holes on the base channel steel of the channel steel bracket 9 and use an anchor drill (vertically downward) to drill anchor holes; install four mine-used resin bolts 10 in place as shown in the figure, insert shims under the base channel steel of the channel steel bracket 9 for leveling, and start anchoring after the level is qualified by using a spirit level; the mine-used resin bolt agent will react quickly to form an expanded solid resin, firmly fixing the channel steel bracket 9 on the floor (since it is a consumable material, the recovery of the channel steel bracket 9 is not considered).

[0035] 3. Place the water collecting and distributing device 1 on the channel steel bracket 9 and then fix it with a "U" - shaped pipe clamp. Place a protective rubber plate between the water collecting and distributing device, the bracket, and the "U" - shaped pipe clamp (the protective rubber plate can prevent sparks generated by direct metal collision). The protective rubber plate surrounds the cylinder of the water collecting and distributing device for one week, and the buckle seam of the protective rubber plate is left on the outside. Because the buckle seam of the protective rubber plate is left on the outside, it is convenient to observe whether the protective rubber plate is distorted when the "U" - shaped pipe clamp is tightened.

[0036] 4. Assemble the proportional pressure reducing valves 5, gate valves 6, and filters 7 on the two water collecting pipes as shown in the figure, and then use the loose flange on the transition tee to adjust the installation angle deviation; at the same time, assemble the bottom drain and sewage valves of the water collecting and distributing device 1 in place. After assembly, open the bottom drain and sewage valves of the water collecting and distributing device 1 and the inlet valves of the two water collecting pipes respectively to flush the water collecting and distributing device 1 and the installed pipes and equipment. Then close the gate valves on the two water collecting pipes.

[0037] 5. Assemble the safety valve 2 and pressure gauge 3 as shown in the figure; assemble the three water distribution pipes as shown in the figure (still use the loose flange on the transition tee to adjust the installation angle deviation).

[0038] 6. Open the gate valves on the two water collection pipes and the gate valves on the three water distribution pipes. Rotate the adjusting screw on the adjustable pressure reducing valve 8 to adjust the pressure after the pressure reducing valve. Gradually rotate its adjusting screw according to the reading of the pressure gauge behind the valve until it meets the set value perfectly; since the working face is continuously mined and withdrawn, the pressure value behind the adjustable pressure reducing valve 8 can be adjusted every 15 days, so that the operating pressure of the fire fighting and sprinkler pipes in each crossheading is within the optimal value range.

[0039] So far, the installation of the fire fighting and sprinkler water collection and distribution device in the underground working face is completed.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fire sprinkler water collection and distribution device for an underground coal mine working face, comprising a water collection and distribution device (1), characterized in that: The water collecting and distributing device (1) is connected with a water collecting pipe and a water distributing pipe, wherein the number of the water collecting pipes is two and the number of the water distributing pipes is three. The water collecting pipe and the water distributing pipe are respectively connected with the water collecting and distributing device (1) via a transition tee (4). A proportional pressure reducing valve (5) and a filter (7) are provided on the pipeline connected with the water collecting pipe, and an adjustable pressure reducing valve (8) is provided on the water distributing pipe.

2. A fire sprinkler water collection and distribution device for underground working face in a coal mine according to claim 1, characterized in that: The water collecting and distributing device (1) is fixed by a channel steel bracket (9), and a mining resin anchor rod (10) is provided at the bottom of the channel steel bracket (9).

3. A fire sprinkler water collection and distribution device for underground working face in a coal mine according to claim 1, characterized in that: Gate valves (6) are respectively provided on the pipelines connected to the water collecting and distributing device (1).

4. A fire sprinkler water collection and distribution device for underground working face in a coal mine according to claim 1, characterized in that: The water collecting and distributing device (1) is connected to a safety valve (2), and the water collecting and distributing device (1) and the water distribution pipe are respectively connected to a pressure gauge (3).

5. A fire sprinkler water collection and distribution device for underground working face in a coal mine according to claim 1, characterized in that: The transition tee (4) comprises a loose flange (41), and the loose flange (41) is respectively connected to the water collecting pipe, the water distribution pipe and the water collecting and distributing device (1).

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