A spray dust-settling structure of a heading machine for coal mining

Abstract

The application discloses a spraying dust-settling structure of a coal mine tunneling machine, which comprises a connecting conduit, a pressure spring movably sleeved on one side of the outer surface of the connecting conduit, and a nozzle structure movably sleeved on the one side of the outer surface of the connecting conduit and in transmission connection with the pressure spring. A spherical nozzle with a through hole is movably sleeved on the left side of the inner cavity of the nozzle structure. The spraying dust-settling structure of the coal mine tunneling machine is provided with the spherical nozzle on the nozzle structure, a linkage rotating disc and a rotating mechanism. When spraying dust-settling, the through hole on the spherical nozzle coincides with the central axis of the nozzle structure. When not spraying dust-settling, the through hole deviates from the central axis of the nozzle structure and is hidden in the nozzle structure. When the nozzle structure is not working, the coal dust outside can not adhere to or enter the nozzle structure, so that the nozzle structure is not blocked.

Description

Technical Field

[0001] This invention belongs to the technical field of atomizing nozzle structure, specifically relating to a spray dust suppression structure for a tunneling machine used in coal mining. Background Technology

[0002] In coal mining, tunneling machines (TBMs), as highly efficient excavating equipment, use their high-speed rotating cutting heads to break up and transport hard coal blocks. They are an important component in achieving fully mechanized and automated coal mining. However, the use of TBMs to mine coal generates a large amount of coal dust. When the coal dust content at the working face reaches 20%-38%, combustion and explosion are highly likely. Therefore, when using TBMs for coal mining, a water spray system must be equipped to suppress dust. However, because the water spray system operates in a dusty environment, a small amount of coal dust can adhere to or enter the nozzles of the water spray system when the TBM is stopped for maintenance. This not only affects the atomization effect of the water spray system and reduces its dust suppression effectiveness, but also, over time, can even clog the nozzle structure, preventing it from performing dust suppression operations. This significantly impacts the service life, stability, and reliability of the nozzle structure.

[0003] Therefore, there is an urgent need for a nozzle structure for use in coal mine spraying systems to address the shortcomings of existing coal mine dust suppression nozzle structures in practical applications. Summary of the Invention

[0004] This invention provides a spray dust suppression structure for a coal mine tunneling machine. It effectively ensures that the nozzle structure does not adhere to or enter coal dust in a working environment with high levels of coal dust, maintaining good atomization and dust suppression effects, and is less prone to clogging. It also boasts high stability and reliability. This invention solves the problem that when the tunneling machine is stopped for maintenance in a high-coal-dust working environment, a small amount of coal dust adheres to or enters the nozzles, affecting the atomization effect and reducing dust suppression efficiency. Furthermore, over time, this can even clog the nozzle structure, preventing it from performing spray dust suppression operations and significantly impacting the nozzle structure's lifespan, stability, and reliability.

[0005] This invention provides the following technical solution: a spray dust suppression structure for a tunneling machine used in coal mining, comprising a connecting conduit, a pressure spring movably sleeved on one side of the outer surface of the connecting conduit, and a transmission connection formed between the pressure spring and a nozzle structure movably sleeved on one side of the outer surface of the connecting conduit. A fixed sliding groove is fixedly installed on one side of the bottom end of the nozzle structure. A spherical nozzle with an internal through hole is movably sleeved on the left side of the inner cavity of the nozzle structure. A linkage turntable connected to the internal shaft of the spherical nozzle is provided on the left side of the top end of the nozzle structure, and a rotation mechanism connected to the internal shaft of the spherical nozzle is provided on the left side of the bottom end of the nozzle structure. A trigger sleeve is fixedly installed on the right side of the top end of the nozzle structure. A piston is movably sleeved inside the trigger sleeve, and a linkage rope extending to the outside of the trigger sleeve and fixedly connected to the linkage turntable is fixedly installed on the left end of the piston. A connecting slot is opened on the left side of the inner cavity of the linkage rope, communicating with the inner cavity of the nozzle structure.

[0006] Furthermore, a linkage ring groove is provided in the middle of the outer surface of the connecting conduit, and a pressure spring is movably sleeved inside it to form a transmission connection with the inner wall of the nozzle structure. A pressure relief hole is provided on one side of the outer surface of the connecting conduit, and it is connected to the pressure relief groove provided on one side of the nozzle structure.

[0007] Furthermore, the left side of the inner wall of the nozzle structure is provided as a boss structure, and in the initial state, the left end face of the connecting conduit contacts the boss structure on it and cuts off the flow loop between the connecting slot and the inner cavity of the nozzle structure.

[0008] Furthermore, the through holes on the spherical nozzle are initially offset from the central axis of the connecting conduit to block the through holes. When the water pump system applies pressure to the inner cavity of the nozzle structure, the spherical nozzle can be rotated under the action of the trigger sleeve, causing the through holes on it to coincide with the central axis of the connecting conduit.

[0009] Furthermore, the rotary mechanism may be equipped with a disc spring inside, forming a transmission connection with the front of the nozzle structure.

[0010] Furthermore, the rotary mechanism may have an elastic belt inside, which forms a transmission connection with the front of the nozzle structure.

[0011] Beneficial effects:

[0012] 1. The dust suppression spray structure of the tunneling machine used in this coal mine has a spherical nozzle and a linkage turntable and rotation mechanism. When spraying dust suppression, the through holes on the nozzle are aligned with the central axis of the nozzle structure. When not spraying dust suppression, the through holes are offset from the central axis of the nozzle structure and hidden inside. Compared with the existing atomizing nozzle structure, this structure can ensure that external coal dust will not adhere to or enter the nozzle when it is not in operation, thus preventing blockage. It has a longer service life and can always maintain good atomization and dust suppression effects, with high stability and reliability.

[0013] 2. The dust suppression spraying structure of the tunneling machine used in this coal mine has a linkage rope, connecting slot, and linkage turntable on the trigger sleeve. When pressure is applied to the inner cavity of the nozzle structure, the trigger sleeve and the inner cavity of the nozzle structure can be automatically connected, thereby triggering the spherical nozzle on the nozzle structure and forcing it to rotate. This ensures that the through hole on the nozzle is aligned with the central axis of the nozzle structure for dust suppression spraying. The operation is simple and does not require manual triggering, resulting in high operability and controllability.

[0014] 3. The spray dust suppression structure of the coal mine tunneling machine, with its pressure relief holes on the connecting pipes and pressure relief grooves on the nozzle structure, can actively discharge water from the inner cavity of the trigger sleeve when the spray dust suppression structure is not triggered, so that the ball nozzle linked with it can return to its initial position. At the same time, it ensures that the inner cavity of the nozzle structure is in a relatively sealed state, effectively preventing water leakage, and further improving the stability and reliability of the spray dust suppression structure in actual use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the nozzle structure and its upper structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the connecting conduit of the present invention;

[0018] Figure 4 This is a front view of embodiment 1 of the present invention;

[0019] Figure 5 This is a front view of embodiment 2 of the present invention.

[0020] In the diagram: 1. Connecting conduit; 2. Pressure spring; 3. Nozzle structure; 4. Spherical nozzle; 5. Linkage turntable; 6. Rotation mechanism; 7. Trigger sleeve; 8. Piston; 9. Linkage rope; 10. Connecting slot; 11. Fixed slide; 12. Pressure relief groove; 13. Linkage ring groove; 14. Pressure relief hole; 15. Disc spring; 16. Elastic band. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1 A dust suppression spray structure for a tunneling machine used in coal mining includes a connecting conduit 1 connected to a water pump system at one end. A pressure spring 2 is movably sleeved on one side of the outer surface of the connecting conduit 1, and a nozzle structure 3 movably sleeved on one side of the outer surface of the connecting conduit 1 is connected to the pressure spring 2. A fixing groove 11 is fixedly installed on one side of the bottom end of the nozzle structure 3, and the nozzle structure 3 is movably connected to the cantilever of the tunneling machine through the fixing groove 11. A spherical nozzle 4 with an internal through hole is movably sleeved on the left side of the inner cavity of the nozzle structure 3. The inner diameter of the through hole in the spherical nozzle 4 is smaller than the inner diameter of the connecting conduit 1. A linkage turntable 5 connected to the internal shaft of the spherical nozzle 4 is provided on the left side of the top end of the nozzle structure 3, and a linkage turntable 5 connected to the internal shaft of the spherical nozzle 4 is provided on the left side of the bottom end of the nozzle structure 3. The rotating mechanism 6 is connected so that when the spherical nozzle 4 is not under force, it can be forced to return to its initial position under the action of the rotating mechanism 6. A trigger sleeve 7 is fixedly installed on the right side of the top of the nozzle structure 3. The right end of the trigger sleeve 7 has a vent hole that communicates with the outside to balance the gas pressure inside. A piston 8 is movably sleeved inside the trigger sleeve 7. A linkage rope 9 is fixedly installed on the left end of the piston 8, extending to the outside of the trigger sleeve 7 and fixedly connected to the linkage turntable 5. A connecting slot 10 is opened on the left side of the inner cavity of the linkage rope 9, which communicates with the inner cavity of the nozzle structure 3. A limiting ring is provided on the left side of the inner cavity of the trigger sleeve 7 and on the right side of the connecting slot 10 to effectively limit the position of the piston 8 on it, so that it will not block the connecting slot 10 when it moves to the leftmost side.

[0023] like Figures 2-3As shown, in this technical solution, a linkage ring groove 13 is provided in the middle of the outer surface of the connecting conduit 1, and a pressure spring 2 is movably sleeved inside it to form a transmission connection with the inner wall of the nozzle structure 3. A pressure relief hole 14 is provided on one side of the outer surface of the connecting conduit 1, and it is connected to the pressure relief groove 12 opened on one side of the nozzle structure 3. Thus, after the flow circuit between the connecting groove hole 10 and the inner cavity of the nozzle structure 3 is blocked, the water in the inner cavity of the trigger sleeve 7 can be discharged through the pressure relief hole 14 and the pressure relief groove 12.

[0024] In this technical solution, the left side of the inner wall of the nozzle structure 3 is provided as a boss structure. In the initial state, the left end face of the connecting conduit 1 contacts the boss structure on it and cuts off the flow circuit between the connecting slot 10 and the inner cavity of the nozzle structure 3. Thus, when the water pump system on it is turned off, the leakage of the water stored on it can be effectively prevented.

[0025] In this technical solution, the through hole on the spherical nozzle 4 is initially offset from the central axis of the connecting conduit 1 to block the through hole and prevent external coal dust from adhering to or entering it. When the water pump system applies pressure to the inner cavity of the nozzle structure 3, the spherical nozzle 4 can be rotated under the action of the trigger sleeve 7, so that the through hole on it coincides with the central axis of the connecting conduit 1.

[0026] Example 1:

[0027] like Figure 4 As shown, in this technical solution, the rotary mechanism 6 may be equipped with a disc spring 15 inside, and form a transmission connection with the front of the nozzle structure 3, so that when the spherical nozzle 4 is not subjected to force, it can be forced to return to its initial position.

[0028] Example 2:

[0029] like Figure 5 As shown, in this technical solution, the inside of the rotary mechanism 6 may be provided with an elastic band 16, which forms a transmission connection with the front of the nozzle structure 3, so that when the spherical nozzle 4 is not subjected to force, it can be forced to return to its initial position.

[0030] The usage method and working principle of this embodiment are as follows:

[0031] First, as described above, the nozzle structure 3 is movably connected to the cantilever of the tunneling machine via the fixed slide 11, and the water pump system on it is connected. When the tunneling machine is started and a dust suppression spray operation is required, the water pump system is triggered to apply pressure to the inner cavity of the nozzle structure 3 through the connecting conduit 1, thereby forcing the nozzle structure 3 to move outward and compress the pressure spring 2, so that the connecting slot 10 is connected to the inner cavity of the nozzle structure 3, allowing water to enter the inner cavity of the trigger sleeve 7 through the connecting slot 10, and forcing the piston 8 on it to move to one side. Under the transmission action of the linkage rope 9, the linkage turntable 5 and the ball nozzle 4 on it rotate accordingly. At the same time, the slewing mechanism 6 is charged until the through hole on the ball nozzle 4 coincides with the central axis of the nozzle structure 3, and the dust suppression spray operation is carried out.

[0032] When the water pump system is shut down, the excess water in the inner cavity of the nozzle structure 3 flows out through the through hole on the ball nozzle 4 under the elastic force of the pressure spring 2, and forces the nozzle structure 3 to move inward until the connecting slot 10 and the inner cavity of the nozzle structure 3 are completely blocked. At the same time, the connecting slot 10 is connected to the linkage ring groove 13 on the connecting conduit 1, and under the elastic force of the rotary mechanism 6, it drives the ball nozzle 4 to rotate in the opposite direction, causing the through hole on it to shift, so that the inner cavity of the nozzle structure 3 is in a completely sealed state and there will be no leakage. Under the action of the linkage turntable 5, the linkage rope 9 is wound up, and the piston 8 on it moves in the opposite direction to discharge the water in the inner cavity of the trigger sleeve 7 through the connecting slot 10 and the linkage ring groove 13 until it returns to the initial position.

Claims

1. A spray dust suppression structure for a tunneling machine used in coal mining, comprising a connecting conduit (1), wherein a pressure spring (2) is movably sleeved on one side of the outer surface of the connecting conduit (1), and a transmission connection is formed between the pressure spring (2) and a nozzle structure (3) movably sleeved on one side of the outer surface of the connecting conduit (1), wherein a fixing groove (11) is fixedly installed on one side of the bottom end of the nozzle structure (3), characterized in that: A spherical nozzle (4) with an internal through hole is movably sleeved on the left side of the inner cavity of the nozzle structure (3). A linkage turntable (5) connected to the internal shaft of the spherical nozzle (4) is provided on the left side of the top of the nozzle structure (3). A rotary mechanism (6) connected to the internal shaft of the spherical nozzle (4) is provided on the left side of the bottom of the nozzle structure (3). A trigger sleeve (7) is fixedly installed on the right side of the top of the nozzle structure (3). A piston (8) is movably sleeved inside the trigger sleeve (7). A linkage rope (9) extending to the outside of the trigger sleeve (7) and fixedly connected to the linkage turntable (5) is fixedly installed on the left end of the piston (8). A connecting slot (10) communicating with the inner cavity of the nozzle structure (3) is provided on the left side of the inner cavity of the trigger sleeve (7). The connecting conduit (1) has a linkage ring groove (13) in the middle of its outer surface, and a pressure spring (2) is movably sleeved inside it to form a transmission connection with the inner wall of the nozzle structure (3). A pressure relief hole (14) is opened on one side of the outer surface of the connecting conduit (1) and is connected to the pressure relief groove (12) opened on one side of the nozzle structure (3). The left side of the inner wall of the nozzle structure (3) is provided as a boss structure. In the initial state, the left end face of the connecting conduit (1) contacts the boss structure on it and cuts off the flow circuit between the connecting slot (10) and the inner cavity of the nozzle structure (3). In the initial state, the through hole on the spherical nozzle (4) is offset from the central axis of the connecting conduit (1) to block the through hole. When the pump system applies pressure to the inner cavity of the nozzle structure (3), the spherical nozzle (4) can be rotated under the action of the trigger sleeve (7), and the through hole on it coincides with the central axis of the connecting conduit (1).

2. The spray dust suppression structure for a tunneling machine used in coal mining according to claim 1, characterized in that: The rotary mechanism (6) may be equipped with a disc spring (15) inside, and form a transmission connection with the front of the nozzle structure (3).

3. The spray dust suppression structure for a tunneling machine used in coal mining according to claim 1, characterized in that: The rotary mechanism (6) may have an elastic band (16) inside, which forms a transmission connection with the front of the nozzle structure (3).

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