Spraying device for underground coal mine

Abstract

The utility model relates to the technical field of coal mine equipment, and discloses a spraying device for an underground coal mine, which comprises a fixing piece, a connecting piece, a plastic water hose and a self-rotating nozzle, the connecting piece is rotationally connected to the lower end of the fixing piece, and a water storage cavity is formed in the connecting piece; the plastic water hose is provided with a first end and a second end which are opposite, the first end is connected to the connecting piece and communicated with the water storage cavity, and the plastic water hose is wound on the outer wall face of the connecting piece around the first central axis. The self-rotating spray head is rotationally connected to the lower end of the connecting piece and is communicated with the water storage cavity; according to the spraying device for the underground coal mine, the connecting piece is rotationally connected to the lower end of the fixing piece, and the self-rotating spraying head is rotationally connected to the lower end of the connecting piece, so that electric sparks and local high temperature can be avoided, potential safety hazards are reduced, and the use safety of the spraying device in the underground coal mine is improved; and rapid winding or rapid unfolding of the plastic water hose on the connecting piece can be realized.

Description

A spraying device for underground coal mines Technical Field

[0001] This utility model relates to the field of coal mine equipment technology, and in particular to a spraying device for underground coal mines. Background Technology

[0002] Coal mines are areas where humans extract coal resources in coal-rich areas. They are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, tunnels are usually dug underground to mine the coal; this is called an underground coal mine.

[0003] A search of relevant patent literature revealed several technical solutions for coal mine dust suppression equipment. For example, Chinese utility model patent (publication number: CN192697928U) discloses a coal mine dust suppression spray nozzle device, whose structure includes a design for the cooperation of a rotating column and a transmission component. This device uses the meshing transmission of a bevel gear set to drive the rotating shaft to rotate via the output of a motor, thereby driving the rotating column to rotate synchronously. Due to the presence of bearing A, the rotating column can rotate stably inside the side box, driving the nozzle to rotate synchronously. Water is introduced into the bottom of the rotating column through a water guide pipe and then sprayed out as the nozzle rotates. Under the action of centrifugal force, the spraying range is expanded, thereby improving the dust suppression effect. However, this patented device relies on motor drive. In the underground environment of a coal mine, the air often contains high concentrations of flammable gases such as methane. Using electric drive is prone to generating electric sparks or localized high temperatures, posing a safety hazard of explosion. Therefore, it is not suitable for use in underground coal mines. Summary of the Invention

[0004] With the aim of at least solving one of the technical problems existing in the prior art, this utility model aims to provide a spraying device for underground coal mines, which can avoid generating electric sparks and local high temperatures, and reduce safety hazards.

[0005] To achieve the above objectives, this utility model provides a sprinkler device for underground coal mines, including a fixing component, a connecting component, a plastic soft water pipe, and a self-rotating nozzle; the connecting component has a first central axis, the connecting component is rotatably connected to the lower end of the fixing component and can rotate around the first central axis, and the connecting component has a water storage cavity inside; the plastic soft water pipe has a first end and a second end opposite to each other, the first end is connected to the connecting component and communicates with the water storage cavity, and the plastic soft water pipe is wound around the outer wall of the connecting component around the first central axis; the self-rotating nozzle is rotatably connected to the lower end of the connecting component and communicates with the water storage cavity.

[0006] In some embodiments, a rotating plate is also included, which is rotatably connected to the lower end of the connector, and the self-rotating nozzle is inserted through the rotating plate from bottom to top.

[0007] In some embodiments, a support frame is also included, which is fixedly connected to the bottom of the rotating plate. The support frame has a receiving space and a water outlet communicating with the receiving space. At least a portion of the self-rotating nozzle is located within the receiving space.

[0008] In some embodiments, the support frame includes a connecting ring and a plurality of connecting rods. The connecting ring is located below the rotating plate. The upper end of each connecting rod is connected to the rotating plate, and the lower end is connected to the connecting ring. The plurality of connecting rods are arranged around the self-rotating nozzle and define the receiving space. The water outlet is formed between two adjacent connecting rods.

[0009] In some embodiments, a clamping tube assembly is also included, comprising a fixed plate, a rotating shaft, a rotating plate, a connecting plate, a connecting screw, and a limiting member. The fixed plate is connected to the outer wall of the fixed member. The upper end of the rotating plate is rotatably connected to the fixed plate via the rotating shaft. The rotating plate is located on the side of the plastic soft water pipe away from the connecting member. The rotating plate has a through hole. The connecting plate is connected to the outer wall of the rotating plate. The connecting screw passes through the through hole, and one end of the connecting screw is connected to the connecting plate. The limiting member is located on the side of the rotating plate away from the plastic soft water pipe. The limiting member is threadedly connected to the connecting screw and is used to restrict the rotation of the rotating plate around the rotating shaft.

[0010] In some embodiments, the clamping tube assembly further includes a first limiting block and a second limiting block, the first limiting block being connected to the side of the rotating plate facing the connector and located above the plastic soft water pipe, and the second limiting block being connected to the side of the rotating plate facing the connector and located below the plastic soft water pipe.

[0011] In some embodiments, the fixing member includes a fixing nail, a suspension plate, a mounting screw, and a mounting plate. The fixing nail is connected to the top of the suspension plate, the suspension plate is located above the mounting plate, the mounting screw is threadedly connected to the suspension plate, the mounting plate is connected to the lower end of the mounting screw, and the connecting member is rotatably connected to the lower end of the mounting plate.

[0012] In some embodiments, the connector also includes a plurality of balls, the top of which has an annular groove, the upper part of which is fitted into the bottom of the mounting plate and the lower part of which is fitted into the annular groove, and the plurality of balls are arranged around the first central axis.

[0013] In some embodiments, a hose connector for detachable connection to the second end is also included, the hose connector being connected to the connector and communicating with the water storage chamber.

[0014] In some embodiments, a rubber plug is also included, which is detachably connected to the second end.

[0015] Compared with the prior art, the beneficial effects of the spraying device for underground coal mines according to this utility model embodiment are as follows:

[0016] (1) By rotating the self-rotating nozzle to the lower end of the connector, when water flows into the water storage chamber through the plastic soft water pipe and into the self-rotating nozzle through the water storage chamber, the kinetic energy of the water flow itself drives the self-rotating nozzle to rotate and spray. No electric drive is required, and no electrical components are needed. This avoids the generation of electric sparks and local high temperatures, reduces safety hazards, and improves the safety of the spraying device in underground coal mines.

[0017] (2) By connecting the first end of the plastic soft water pipe to the connector and winding the plastic soft hose around the first axis on the outer wall of the connector, the plastic soft water pipe can be unfolded in an orderly manner from the outer wall of the connector according to the actual working depth in the underground coal mine, so as to flexibly extend the unwinding length of the plastic soft water pipe (unwinding length refers to the length of the plastic soft water pipe not wound on the connector, and winding length refers to the length of the plastic soft water pipe wound on the connector); or the plastic soft water pipe can be wound in an orderly manner around the first axis on the outer wall of the connector for recycling, so as to flexibly shorten the unwinding length of the plastic soft water pipe.

[0018] (3) By rotating the connector to the lower end of the fixing part and rotating the self-rotating nozzle to the lower end of the connector, the fixing part and the self-rotating nozzle can remain stationary when the connector rotates around the first axis. When it is necessary to store the plastic soft water pipe, the connector can be rotated separately to quickly and neatly wind the plastic soft water pipe around the outer wall of the connector, thereby improving storage efficiency. When it is necessary to unfold the plastic soft water pipe, the connector can also be rotated separately to easily and quickly unfold the plastic soft water pipe layer by layer from the connector, making the unfolding operation more labor-saving and smooth. Attached Figure Description

[0019] Figure 1 is a structural schematic diagram of a spraying device for underground coal mines provided in an embodiment of this utility model;

[0020] Figure 2 is a partial structural schematic diagram of a spraying device for underground coal mines provided in an embodiment of this utility model;

[0021] Figure 3 is a cross-sectional view of the connector provided in an embodiment of the present invention;

[0022] Figure 4 is a front view of the plastic soft water pipe provided in the embodiment of this utility model when it is unfolded;

[0023] Figure 5 is a schematic diagram of the clamping tube assembly provided in an embodiment of this utility model.

[0024] In the diagram, 1 is a fastener; 11 is a fixing screw; 12 is a suspension plate; 13 is a mounting screw; and 14 is a mounting plate.

[0025] 2. Connecting parts; 21. Annular groove; 210. Water storage cavity 210;

[0026] 3. Plastic flexible water pipe; 31. First end; 32. Second end;

[0027] 4. Self-rotating nozzle;

[0028] 5. Rotating plate;

[0029] 6. Support frame; 61. Connecting ring; 62. Connecting rod; 610. Accommodation space; 620. Water outlet;

[0030] 7. Clamping tube assembly; 71. Fixing plate; 72. Rotating shaft; 73. Rotating plate; 74. Connecting plate; 75. Connecting screw; 76. Limiting component; 77. First limiting block; 78. Second limiting block; 731. Through hole;

[0031] 8. Ball bearings;

[0032] 9. Hose connector;

[0033] 10. Rubber stopper;

[0034] 100. First central axis. Detailed Implementation

[0035] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0038] 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0041] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0042] As shown in Figures 1-5, a preferred embodiment of the present invention is a spraying device for underground coal mines, comprising a fixing component 1, a connecting component 2, a plastic soft water pipe 3, and a self-rotating nozzle 4.

[0043] The connector 2 has a first central axis 100. The connector 2 is rotatably connected to the lower end of the fixing member 1 and can rotate around the first central axis 100. The connector 2 has a water storage cavity 210 inside. The plastic soft water pipe 3 has a first end 31 and a second end 32. The first end 31 is connected to the connector 2 and communicates with the water storage cavity 210. The second end 32 can be used to connect to an external water source. The plastic soft water pipe 3 is wrapped around the outer wall of the connector 2 around the first central axis 100. The self-rotating nozzle 4 is rotatably connected to the lower end of the connector 2 and communicates with the water storage cavity 210.

[0044] Based on this technical solution, by rotatably connecting the self-rotating nozzle 4 to the lower end of the connector 2, when water flows into the water storage chamber 210 through the plastic soft water pipe 3 and into the self-rotating nozzle 4 through the water storage chamber 210, the kinetic energy of the water flow itself drives the self-rotating nozzle 4 to rotate and spray. No electric drive is required, and no electrical components are needed, thereby avoiding the generation of electric sparks and local high temperatures, reducing safety hazards, and improving the safety of the spraying device in underground coal mines.

[0045] By connecting the first end 31 of the plastic soft water pipe 3 to the connector 2 and winding the plastic soft water pipe 3 around the first central axis 100 on the outer wall of the connector 2, the plastic soft water pipe 3 can be unfolded in an orderly manner from the outer wall of the connector 2 according to the actual working depth in the underground coal mine, so as to flexibly extend the unwinding length of the plastic soft water pipe 3 (unwinding length refers to the length of the plastic soft water pipe 3 not wound on the connector 2, and winding length refers to the length of the plastic soft water pipe 3 wound on the connector 2); or the plastic soft water pipe 3 can be wound in an orderly manner around the first central axis 100 on the outer wall of the connector 2 for recycling, so as to flexibly shorten the unwinding length of the plastic soft water pipe 3.

[0046] By rotatably connecting the lower end of the fixing member 1 to the connector 2 and rotatably connecting the self-rotating nozzle 4 to the lower end of the connector 2, the fixing member 1 and the self-rotating nozzle 4 can remain stationary when the connector 2 rotates around the first central axis 100. When it is necessary to store the plastic soft water tube 3, the plastic soft water tube 3 can be quickly and neatly wound around the outer wall of the connector 2 by rotating the connector 2 alone, thereby improving storage efficiency. When it is necessary to unfold the plastic soft water tube 3, the plastic soft water tube 3 can also be easily and quickly unfolded layer by layer from the connector 2 by rotating the connector 2 alone, making the unfolding operation more effortless and smooth.

[0047] The self-rotating sprinkler head 4 is a spraying component that uses the centrifugal force and reaction force of water flow to make the sprinkler head rotate while spraying water, thereby achieving automatic and uniform spraying. The self-rotating sprinkler head 4 does not require an external power source (such as an electric motor), but relies on the water flow to generate rotational motion through the internally designed mechanical structure, thereby evenly distributing water to a large area.

[0048] The self-rotating nozzle 4 of this utility model is a self-rotating nozzle 4 of the prior art, such as a turbine-driven rotating nozzle, a reaction force-driven rotating nozzle, and an oscillating rotating nozzle.

[0049] Rotary connection between connector 2 and fixed part 1 can be achieved through existing rotary connection methods such as bearing connection and shaft hole fit.

[0050] Specifically, in this embodiment, the plastic soft water pipe 3 is a PVC plastic soft water pipe 3.

[0051] In this embodiment, the connector 2 is a cylindrical structure.

[0052] Referring to Figures 1-2, the spraying device also includes a rotating plate 5, which is rotatably connected to the lower end of the connector 2, and the rotating nozzle 4 is inserted through the rotating plate 5 from bottom to top.

[0053] In this embodiment, specifically, the self-rotating nozzle 4 is inserted from bottom to top into the middle area of ​​the rotating plate 5.

[0054] The rotational connection between the connector 2 and the rotating plate 5 can be achieved through existing rotational connection methods such as bearing connection and shaft hole fit, which will not be elaborated here.

[0055] The spraying device also includes a support frame 6, which is fixedly connected to the bottom of the rotating plate 5. The support frame 6 has a receiving space 610 and a water outlet 620 communicating with the receiving space 610. The self-rotating nozzle 4 is at least partially located within the receiving space 610.

[0056] By placing at least part of the rotating nozzle 4 within the receiving space 610, the support frame 6 can provide some protection for the rotating nozzle 4. The water sprayed by the rotating nozzle 4 can exit from inside the receiving space 610 to the outside of the receiving space 610 through the water outlet 620.

[0057] The support frame 6 includes a connecting ring 61 and multiple connecting rods 62. The connecting ring 61 is located below the rotating plate 5. The upper end of the connecting rod 62 is connected to the rotating plate 5, and the lower end is connected to the connecting ring 61. The multiple connecting rods 62 are arranged around the self-rotating nozzle 4 and define the receiving space 610. A water outlet 620 is formed between two adjacent connecting rods 62.

[0058] Multiple connecting rods 62 are arranged around the self-rotating nozzle 4. This not only blocks external debris from entering the receiving space 610 to protect the self-rotating nozzle 4, but also naturally forms water outlet holes 620 between adjacent connecting rods 62, so that the water flow sprayed from the self-rotating nozzle 4 can be guided in an orderly manner to the outside of the receiving space 610 for spraying.

[0059] Referring to Figures 1 and 2, the fastener 1 includes a fixing nail 11, a suspension plate 12, a mounting screw 13, and a mounting plate 14. The fixing nail 11 is connected to the top of the suspension plate 12, the suspension plate 12 is located above the mounting plate 14, the mounting screw 13 is threadedly connected to the suspension plate 12, the mounting plate 14 is connected to the lower end of the mounting screw 13, and the connector 2 is rotatably connected to the lower end of the mounting plate 14.

[0060] By using the fixing nail 11 and the suspension plate 12 together, the spraying device can be firmly fixed to the top of the underground coal mine roadway or other supporting structures, ensuring the stability of the equipment in complex environments and preventing loosening or falling off due to vibration or water flow impact.

[0061] By setting the mounting screw 13 and the suspension plate 12 to a threaded connection, the mounting screw 13, mounting plate 14, connector 2, self-rotating nozzle 4, rotating plate 5, support frame 6 and clamping pipe assembly 7 can be assembled into a spray assembly first, and then the spray assembly can be threaded onto the suspension plate 12 through the mounting screw 13, so as to realize the installation of the spray device in the underground coal mine roadway, making the installation process simpler and faster.

[0062] The spray device also includes multiple balls 8. The top of the connector 2 is provided with an annular groove 21. The upper part of the balls 8 is embedded in the bottom of the mounting plate 14, and the lower part is embedded in the annular groove 21. The multiple balls 8 are arranged around the first central axis 100. The arrangement of multiple balls 8 evenly distributed around the first central axis 100 and cooperating with the annular groove 21 makes the rotation of the connector 2 more flexible and reliable, which helps the plastic soft water pipe 3 to be quickly wound and unwound on the outer wall of the connector 2.

[0063] Existing sprinkler systems suffer from limitations in water supply pipeline layout during practical applications. When sprinkler systems extend deep into coal mines, the limited length of the hoses makes it difficult to connect and coordinate multiple sprinkler systems, resulting in limited coverage of the entire sprinkler system and affecting the overall dust suppression effect.

[0064] Referring to Figures 1 and 2, the spraying device also includes a hose connector 9 for detachable connection to the second end 32. The hose connector 9 is connected to the connector 2 and communicates with the water storage chamber 210. The hose connector 9 provides a standardized connection interface for the second end 32 of the plastic flexible water pipe 3, allowing multiple spraying devices to be flexibly connected through the plastic flexible water pipe 3. When continuous dust suppression is required in long tunnels or deep areas, the second end 32 of the hose of one spraying device can be connected to the hose connector 9 of another spraying device to form a series water supply path, thereby realizing the connection and coordinated operation between multiple spraying devices to achieve multi-point synchronous spraying, expand the coverage of the entire spraying system, and improve the dust suppression effect.

[0065] Understandably, the hose connector 9 has two states: open and closed. When the hose connector 9 is in the open state, water in the water storage chamber 210 can flow out through the hose connector 9. When the hose is in the closed state, water in the water storage chamber 210 cannot flow out through the hose connector 9. Switching between the open and closed states of the hose connector 9 can be achieved in a conventional way, such as by installing a rubber stopper 10, a sealing cap, or a plug onto the hose connector 9 to achieve the closed state, and by removing the rubber stopper 10, sealing cap, or plug from the hose connector 9 to achieve the open state. In the two spray devices, when the hose connector 9 of the second spray device is in the open state, the second end 32 of the plastic flexible water pipe 3 of the first spray device is moved and connected to the hose connector 9 of the second spray device to connect the two spray devices.

[0066] Referring to Figures 2 and 4, the spray device also includes a rubber plug 10, which is detachably connected to the second end 32. When multiple spray devices are operating in concert or when the plastic flexible water pipe 3 is idle, residual water may leak from the second end 32 of the plastic flexible water pipe 3 due to gravity or water pressure. By using the rubber plug 10 to seal the second end 32 of the plastic flexible water pipe 3, water leakage can be prevented, the internal pressure of the system can be kept stable, and the overall water supply efficiency can be improved.

[0067] Referring to Figures 1, 2, and 5, the spraying device also includes a clamping tube assembly 7. The clamping tube assembly 7 includes a fixing plate 71, a rotating shaft 72, a rotating plate 73, a connecting plate 74, a connecting screw 75, and a limiting member 76. The fixing plate 71 is connected to the outer wall of the fixing member 1. The upper end of the rotating plate 73 is rotatably connected to the fixing plate 71 via the rotating shaft 72. The rotating plate 73 is located on the side of the plastic soft water pipe 3 away from the connecting member 2. The rotating plate 73 has a through hole 731. The connecting plate 74 is connected to the outer wall of the rotating plate 5. The connecting screw 75 passes through the through hole 731. One end of the connecting screw 75 is connected to the connecting plate 74. The limiting member 76 is located on the side of the rotating plate 73 away from the plastic soft water pipe 3. The limiting member 76 is threadedly connected to the connecting screw 75 and is used to limit the rotation of the rotating plate 73 around the rotating shaft 72.

[0068] The cooperation between the rotating plate 73 and the limiting member 76 can stably clamp the plastic soft water pipe 3 in a suitable position, preventing the plastic soft water pipe 3, which is wrapped around the outer wall of the connector 2, from sliding, falling off, or swinging disorderly under the movement of the self-rotating nozzle 4 or the impact of water flow, thereby ensuring the continuity and stability of the water supply process. At the same time, since the plastic soft water pipe 3 is located between the rotating plate 73 and the limiting member 76, the rotating plate 73 and the limiting member 76 can act as a guide and limiting device during the winding and unwinding process of the plastic soft water pipe 3, which helps to guide the plastic soft water pipe 3 to unfold or wind along the set path, avoiding knots, twisting, or local stress concentration caused by the plastic soft water pipe 3 bending randomly, thus improving the smoothness of use and ease of operation of the plastic soft water pipe 3.

[0069] Since the upper end of the rotating plate 73 is rotatably connected to the fixed plate 71 via the rotating shaft 72, and the limiting member 76 is fixed to the connecting screw 75 by a threaded connection and located on the side of the rotating plate 73 away from the plastic soft water pipe 3, the length of the connecting screw 75 entering the threaded hole of the limiting member 76 can be adjusted by rotating the limiting member 76, thereby adjusting the position of the limiting member 76 on the connecting screw 75, so that the limiting member 76 can push the lower end of the rotating plate 73 to move, thereby adjusting the gap between the rotating plate 73 and the connecting member 2, and thus adjusting the clamping force of the rotating plate 73 and the connecting member 2 on the plastic soft water pipe 3.

[0070] In this embodiment, there are two fixed plates 71. The two ends of the rotating shaft 72 are respectively connected to the two fixed plates 71. The rotating plate 73 is located between the two fixed plates 71. The rotating plate 73 has a through hole for the rotating shaft 72 to pass through. The rotating plate 73 is connected to the rotating shaft 72 through the through hole.

[0071] For example, the limiting member 76 can be a nut or a component with a threaded hole.

[0072] The clamping tube assembly 7 also includes a first limiting block 77 and a second limiting block 78. The first limiting block 77 is connected to the side of the rotating plate 73 facing the connector 2 and is located above the plastic soft water pipe 3. The second limiting block 78 is connected to the side of the rotating plate 73 facing the connector 2 and is located below the plastic soft water pipe 3.

[0073] With the cooperation of the first limiting block 77 and the second limiting block 78, the plastic soft water pipe 3 can be constrained in the vertical direction. This ensures that the plastic soft water pipe 3 is not only subjected to the lateral clamping force (the clamping force of the rotating plate 73 and the connector 2 on the plastic soft water pipe 3), but also to the vertical limiting protection. This prevents the plastic soft water pipe 3 from coming out, getting stuck, or being locally deformed due to external forces, thus improving the safety of the spray device. It is especially suitable for operation scenarios with frequent vibrations and complex environments in underground coal mines.

[0074] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A spraying device for underground coal mines, characterized in that, include: A fixing member (1); a connecting member (2) having a first central axis (100), the connecting member (2) being rotatably connected to the lower end of the fixing member (1) and capable of rotating around the first central axis (100), the connecting member (2) having a water storage cavity (210) inside; a plastic soft water pipe (3) having a first end (31) and a second end (32) opposite to each other, the first end (31) being connected to the connecting member (2) and communicating with the water storage cavity (210), the plastic soft water pipe (3) being wound around the outer wall of the connecting member (2) around the first central axis (100); a self-rotating nozzle (4) being rotatably connected to the lower end of the connecting member (2) and communicating with the water storage cavity (210).

2. The spraying device for underground coal mines according to claim 1, characterized in that, It also includes a rotating plate (5), which is rotatably connected to the lower end of the connector (2), and the self-rotating nozzle (4) is inserted through the rotating plate (5) from bottom to top.

3. The spraying device for underground coal mines according to claim 2, characterized in that, It also includes a support frame (6), which is fixedly connected to the bottom of the rotating plate (5). The support frame (6) has a receiving space (610) and a water outlet (620) communicating with the receiving space (610). At least a portion of the self-rotating nozzle (4) is located within the receiving space (610).

4. The spraying device for underground coal mines according to claim 3, characterized in that, The support frame (6) includes a connecting ring (61) and multiple connecting rods (62). The connecting ring (61) is located below the rotating plate (5). The upper end of the connecting rod (62) is connected to the rotating plate (5), and the lower end is connected to the connecting ring (61). The multiple connecting rods (62) are arranged around the self-rotating nozzle (4) and define the receiving space (610). The water outlet (620) is formed between two adjacent connecting rods (62).

5. The spraying device for underground coal mines according to claim 2, characterized in that, It also includes a clamping tube assembly (7), which includes a fixing plate (71), a rotating shaft (72), a rotating plate (73), a connecting plate (74), a connecting screw (75), and a limiting member (76). The fixing plate (71) is connected to the outer wall of the fixing member (1). The upper end of the rotating plate (73) is rotatably connected to the fixing plate (71) through the rotating shaft (72). The rotating plate (73) is located on the side of the plastic soft water pipe (3) away from the connecting member (2). 3) A through hole (731) is provided. The connecting plate (74) is connected to the outer side wall of the rotating plate (5). The connecting screw (75) passes through the through hole (731). One end of the connecting screw (75) is connected to the connecting plate (74). The limiting member (76) is located on the side of the rotating plate (73) away from the plastic soft water pipe (3). The limiting member (76) is threaded to the connecting screw (75) and is used to limit the rotation of the rotating plate (73) around the rotating shaft (72).

6. The spraying device for underground coal mines according to claim 5, characterized in that, The clamping tube assembly (7) further includes a first limiting block (77) and a second limiting block (78). The first limiting block (77) is connected to the side of the rotating plate (73) facing the connector (2) and located above the plastic soft water pipe (3). The second limiting block (78) is connected to the side of the rotating plate (73) facing the connector (2) and located below the plastic soft water pipe (3).

7. The spraying device for underground coal mines according to claim 1, characterized in that, The fixing component (1) includes a fixing nail (11), a suspension plate (12), a mounting screw (13), and a mounting plate (14). The fixing nail (11) is connected to the top of the suspension plate (12), the suspension plate (12) is located above the mounting plate (14), the mounting screw (13) is threadedly connected to the suspension plate (12), the mounting plate (14) is connected to the lower end of the mounting screw (13), and the connecting component (2) is rotatably connected to the lower end of the mounting plate (14).

8. The spraying device for underground coal mines according to claim 7, characterized in that, It also includes multiple balls (8), the top of the connector (2) is provided with an annular groove (21), the upper part of the balls (8) is embedded in the bottom of the mounting plate (14) and the lower part is embedded in the annular groove (21), and the multiple balls (8) are arranged around the first central axis (100).

9. The spraying device for underground coal mines according to claim 1, characterized in that, It also includes a hose connector (9) for detachable connection to the second end (32), the hose connector (9) being connected to the connector (2) and communicating with the water storage chamber (210).

10. The spraying device for underground coal mines according to claim 1, characterized in that, It also includes a rubber plug (10), which is detachably connected to the second end (32).

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