A tunneling machine cutting unit spray device

Abstract

This utility model discloses a spraying device for the cutting section of a tunneling machine, relating to the technical field of auxiliary systems for industrial mining tunneling equipment. It includes a rectangular end plate fixed to the tunneling machine's rotary table, with a detachable protective cylinder at its front end. An axially movable annular block is fitted over the protective cylinder, and the front end of the annular block is rotatably connected to an annular outer shell with an annular water pipe. Eight fan-shaped nozzles arranged in a ring are located at the front end of the annular outer shell. The annular water pipe is connected to an inlet pipe on the end plate via an external connecting pipe and a flexible hose. The inlet pipe is connected in series with a pump body to an external water source. An electric telescopic rod is located at the rear end of the end plate, with its output end connected to the annular block via a guide rod to adjust the spray distance. A reciprocating pneumatic motor is also included, which, through a rotating shaft and a long-shaft cylindrical gear, meshes with the outer gear ring of the annular outer shell, driving the outer shell to rotate 180 degrees in a cyclic reciprocating motion. This device provides comprehensive spray coverage without blind spots, excellent dust suppression and cooling effects, resistance to harsh underground environments, and convenient installation and maintenance. It is suitable for tunneling machine cutting operations in underground mines such as coal mines and metal mines.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary systems for industrial mining tunneling equipment, specifically a spray device for the cutting section of a tunneling machine. Background Technology

[0002] In underground mine tunneling operations, the cantilever roadheader is the core equipment. Its cutting section cuts through rock or coal seams using high-speed rotating cutting teeth, generating a large amount of respirable dust during the process. Simultaneously, the friction between the cutting teeth and the rock causes a rapid increase in the temperature of the cutting head and teeth. In high-gas mines, the cutting operation may also disturb the coal seam gas, posing a risk of combustion and explosion. Therefore, the spraying device, as a key auxiliary equipment of the roadheader's cutting section, directly determines the safety, health, and equipment stability of underground operations.

[0003] Existing spray devices for the cutting section of tunneling machines suffer from the following technical drawbacks: poor spray coverage and adaptability; traditional devices often spray from a fixed position with non-adjustable nozzle angle and height; when the cutting head extends, retracts, or adjusts the cutting angle, spray blind spots easily appear, resulting in low dust suppression efficiency; and the spray distance cannot be flexibly adjusted according to cutting conditions (such as soft / hard rock, shallow / deep holes), affecting dust suppression and cooling effects. Based on these problems, there is an urgent need for a new type of spray device with a simple and reliable structure and excellent spraying effect.

[0004] Therefore, those skilled in the art have provided a spraying device for the cutting section of a tunneling machine to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a spraying device for the cutting section of a tunneling machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A spraying device for the cutting section of a tunneling machine includes an overall rectangular end plate with a circular through hole at its center. Around the through hole are eight evenly distributed connecting holes machined according to the bolt holes of the front flange of the tunneling machine's rotary table. The end plate is rigidly fixed to the rotary table via high-strength bolts passing through the connecting holes. A protective cylinder is detachably mounted on the front end face of the end plate via bolts. Rectangular sliding strips are fixedly connected to both sides of the outer wall of the protective cylinder. An annular block is fitted around the outer side of the protective cylinder. An annular outer shell is rotatably connected to the front end face of the annular block. An annular water pipe is located inside the annular outer shell. Eight fan-shaped nozzles arranged in a ring are located on the front end face of the annular outer shell, and each fan-shaped nozzle is connected to the annular water pipe via a branch pipe.

[0008] As a further embodiment of this utility model: an electric telescopic rod is fixedly installed below the rear end face of the end plate, the output end of the electric telescopic rod extends through the end plate to its front end face and is fixedly connected to a guide rod, and the end of the guide rod is fixedly connected to an annular block.

[0009] As a further embodiment of this utility model: a reciprocating pneumatic motor is fixedly installed above the rear end face of the end plate, the output shaft of the reciprocating pneumatic motor extends through the end plate to its front end face and is fixedly connected to a rotating shaft, and a long-shaft cylindrical gear is fixedly connected to the end of the rotating shaft.

[0010] As a further embodiment of this utility model: an external gear ring is fixedly connected to the circumferential wall of the annular shell, and the long-axis cylindrical gear meshes with the external gear ring to drive the annular shell to perform cyclic reciprocating rotation.

[0011] As a further embodiment of this utility model: a rectangular groove adapted to the rectangular slide bar is provided on the inner side of the annular block, and the annular block moves back and forth along the axial direction of the protective cylinder through the sliding cooperation between the rectangular slide bar and the rectangular slide groove.

[0012] As a further embodiment of this utility model: the front end face of the annular block is provided with an annular groove, and an annular slider is embedded in the annular groove. The annular slider is fixedly connected to the rear end face of the annular shell, so that the annular shell and the annular block are rotatably connected.

[0013] As a further improvement of this utility model: an external connecting pipe is fixedly connected to the annular water pipe, the external connecting pipe extends through to the outside of the annular shell, and an inlet pipe is fixed on the end plate at the position corresponding to the external connecting pipe.

[0014] As a further embodiment of this utility model: one end of the water inlet pipe is connected to an external water source, and the other end is connected to a flexible hose via a quick connector. The other end of the flexible hose is fixedly connected to an external connecting pipe via a quick connector, and a redundancy is reserved to accommodate the movement stroke of the annular block. A pump body is connected in series between the water inlet pipe and the external water source.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The spray device for the cutting section of the tunneling machine provided by this utility model offers several advantages in terms of spraying function and operational efficiency. Eight fan-shaped nozzles arranged in a ring on the front face of the annular outer shell, combined with a spray angle of 120°-150° and a design tilted towards the center, achieve comprehensive coverage within a 1.5m range in front of the cutting head. A reciprocating pneumatic motor drives the annular outer shell to rotate 180 degrees, forming a dynamic annular water curtain that effectively suppresses dust diffusion. Simultaneously, the atomized slurry evenly cools the surface of the cutting head, preventing damage to the cutting components due to overheating and ensuring continuous and stable tunneling operations. Furthermore, an electric telescopic rod moves the annular block axially along the protective cylinder, allowing for flexible adjustment of the distance between the nozzles and the cutting head to adapt to different cutting conditions and further optimize the spraying effect. Regarding ease of operation and maintenance, the protective cylinder and end plate are connected by detachable bolts, and the external connecting pipe and water inlet pipe are connected to a flexible hose via a quick-connect coupling. The components are easy to install and disassemble, and daily inspection and maintenance are simple, requiring no complex disassembly. This effectively shortens equipment downtime for maintenance and improves tunneling efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a spray device for the cutting section of a tunneling machine.

[0018] Figure 2 This is a schematic diagram of the structure of the back of the end plate of the spray device in the cutting section of a tunneling machine.

[0019] Figure 3 This is a side view of a spray device for the cutting section of a tunneling machine.

[0020] Figure 4 This is a schematic diagram of the structure of the annular outer shell in the spray device of the cutting section of a tunneling machine.

[0021] Figure 5 This is a schematic diagram of the structure of an annular block in the spray device of the cutting section of a tunneling machine.

[0022] Figure 6 This is a schematic diagram of the hose structure in the spray device of the cutting section of a tunneling machine.

[0023] In the diagram: 1. End plate; 2. Protective cylinder; 3. Rectangular slide bar; 4. Annular block; 5. Rectangular slide groove; 6. Annular slide groove; 7. Annular outer shell; 8. External gear ring; 9. Annular water pipe; 10. Annular slider; 11. Fan-shaped nozzle; 12. External connecting pipe; 13. Water inlet pipe; 14. Flexible hose; 15. Circular through hole; 16. Connecting hole; 17. Electric telescopic rod; 18. Guide rod; 19. Rotating shaft; 20. Long shaft cylindrical gear; 21. Reciprocating pneumatic motor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Reference Figures 1-6 This embodiment provides a spray device for the cutting section of a tunneling machine, including an overall rectangular end plate 1. The end plate 1 is made of Q345B steel plate with rounded corners. The surface is treated with sandblasting for rust removal, epoxy primer, and polyurethane topcoat to suit the humid and dusty underground environment. A circular through hole 15 is opened in the center of the end plate 1. The diameter of the through hole is adapted to the outer diameter of the inner cylinder of the tunneling machine's telescopic section to ensure that the inner cylinder can pass through smoothly. Around the through hole, eight evenly distributed connecting holes 16 are machined according to the bolt hole positions of the flange at the front end of the tunneling machine's rotary table. The end plate 1 is rigidly fixed to the rotary table by high-strength bolts passing through the connecting holes 16. A spring anti-loosening washer is placed between the bolt head and the end plate 1 to prevent the bolts from loosening due to underground vibration.

[0027] A protective cylinder 2 is detachably mounted on the front end face of the end plate 1 via bolts. Rectangular slide bars 3 are fixedly connected to opposite sides of the outer wall of the protective cylinder 2. The rectangular slide bars 3 and the protective cylinder 2 are integrally formed, and their length is consistent with the axial length of the protective cylinder 2. An annular block 4 is fitted on the outer side of the protective cylinder 2. A rectangular groove 5 adapted to the rectangular slide bar 3 is opened on the inner side of the annular block 4. The annular block 4 can move smoothly back and forth along the axial direction of the protective cylinder 2 through the sliding engagement between the rectangular slide bar 3 and the rectangular groove 5.

[0028] The annular block 4 has an annular groove 6 on its front end face. The annular groove 6 has a T-shaped cross-section, and an annular slider 10 is embedded in the groove. The cross-section of the annular slider 10 is adapted to the annular groove 6. The annular slider 10 is fixedly connected to the rear end face of the annular shell 7 by welding, so that the annular shell 7 can rotate flexibly around the annular block 4. An annular water pipe 9 is welded and fixed inside the annular shell 7. The annular water pipe 9 is coaxially arranged with the annular shell 7.

[0029] The annular outer shell 7 has eight fan-shaped nozzles 11 arranged in a ring on its front end. The nozzle axes are inclined at 5°-10° towards the central axis of the protective cylinder 2, ensuring that the spray covers an area within 1.5m in front of the cutting head without any blind spots. Each fan-shaped nozzle 11 is connected to the annular water pipe 9 via a branch pipe. An external connecting pipe 12 is also fixedly connected to the annular water pipe 9 via a flange. The external connecting pipe 12 extends through the annular outer shell 7 and has a quick-connect female connector at its end.

[0030] On the end plate 1, at the position corresponding to the external connecting pipe 12, a water inlet pipe 13 is fixed by a pipe clamp. One end of the water inlet pipe 13 is connected to a flexible hose 14 via a quick-connect male connector, and the other end is connected to an external water source. A pump body is connected in series between the water inlet pipe 13 and the external water source. The length of the flexible hose 14 is reserved with a redundancy of 1.2 times the maximum travel of the annular block 4 to prevent the flexible hose 14 from being pulled and broken when the annular block 4 moves.

[0031] An electric telescopic rod 17 is fixedly installed below the rear end face of the end plate 1 by bolts. The output end of the electric telescopic rod 17 extends through the end plate 1 to its front end face and is fixedly connected to a guide rod 18 by a flange. The end of the guide rod 18 is fixedly connected to the annular block 4 by welding.

[0032] A reciprocating pneumatic motor 21 is fixedly mounted on the upper rear end face of the end plate 1 via a motor mount. The output shaft of the reciprocating pneumatic motor 21 extends through the end plate 1 to its front end face and is fixedly connected to a rotating shaft 19 via a coupling. A long-shaft cylindrical gear 20 is fixedly connected to the end of the rotating shaft 19 via a key connection. An external gear ring 8 is fixedly welded to the circumferential wall of the annular housing 7. The module, number of teeth, and tooth width of the external gear ring 8 are all adapted to the long-shaft cylindrical gear 20. The two mesh and drive the annular housing 7 to perform 180-degree cyclic reciprocating rotation.

[0033] Before use, first fix the entire device to the front end of the tunneling machine's rotary table with high-strength bolts through the connection hole 16 of the end plate 1, ensuring that the end plate 1 fits tightly with the rotary table without any looseness; then connect the water inlet pipe 13 to the external water source and pump body.

[0034] When the tunneling machine starts the cutting operation, the pump body is started simultaneously. After the external water source is pressurized by the pump body, it enters the annular water pipe 9 through the water inlet pipe 13, hose 14, and external connecting pipe 12. Then it is distributed to eight fan-shaped nozzles 11 through each branch pipe. The slurry is atomized and sprayed to the area in front of the cutting head to achieve dust suppression and cooling of the cutting components.

[0035] If the spray distance needs to be adjusted, a control signal is sent to the electric telescopic rod 17 through the tunneling machine control panel. The piston rod of the electric telescopic rod 17 extends or retracts, driving the guide rod 18 and the annular block 4 to move back and forth along the rectangular slide bar 3 of the protective cylinder 2. The annular block 4 synchronously drives the annular outer shell 7 and the nozzle to move until the optimal spray distance is adjusted.

[0036] To achieve dynamic spraying, start the reciprocating pneumatic motor 21. The motor output shaft drives the rotating shaft 19 and the long shaft cylindrical gear 20 to rotate. The long shaft cylindrical gear 20, through meshing with the external gear ring 8, drives the annular shell 7 to rotate 180 degrees around the annular block 4. The nozzle rotates synchronously with the shell, forming a dynamic annular water curtain, which can uniformly cool the surface of the cutting head.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spraying device for the cutting section of a tunneling machine, comprising an end plate (1) that is generally rectangular, characterized in that, The end plate (1) has a circular through hole (15) in the center. Around the through hole (15), there are eight evenly distributed connecting holes (16) machined according to the bolt holes of the front flange of the tunneling machine rotary table. The end plate (1) is rigidly fixed to the rotary table by passing through the connecting holes (16) with high-strength bolts. The front end face of the end plate (1) is detachably installed with a protective cylinder (2) by bolts. Rectangular sliding strips (3) are fixedly connected to both sides of the outer wall of the protective cylinder (2). An annular block (4) is sleeved on the outside of the protective cylinder (2). The front end face of the annular block (4) is rotatably connected with an annular shell (7). An annular water pipe (9) is provided inside the annular shell (7). The front end face of the annular shell (7) is provided with eight fan-shaped nozzles (11) arranged in a ring. Each fan-shaped nozzle (11) is connected to the annular water pipe (9) through a branch pipe.

2. The spraying device for the cutting section of a tunneling machine according to claim 1, characterized in that, An electric telescopic rod (17) is fixedly installed below the rear end face of the end plate (1). The output end of the electric telescopic rod (17) extends through the end plate (1) to its front end face and is fixedly connected to a guide rod (18). The end of the guide rod (18) is fixedly connected to the annular block (4).

3. The spraying device for the cutting section of a tunneling machine according to claim 1, characterized in that, A reciprocating pneumatic motor (21) is fixedly installed above the rear end face of the end plate (1). The output shaft of the reciprocating pneumatic motor (21) extends through the end plate (1) to its front end face and is fixedly connected to a rotating shaft (19). A long-shaft cylindrical gear (20) is fixedly connected to the end of the rotating shaft (19).

4. The spraying device for the cutting section of a tunneling machine according to claim 3, characterized in that, An external gear ring (8) is fixedly connected to the circumferential wall of the annular shell (7). The long-axis cylindrical gear (20) meshes with the external gear ring (8) to drive the annular shell (7) to rotate 180 degrees in a reciprocating cycle.

5. A spraying device for the cutting section of a tunneling machine according to claim 1, characterized in that, The inner side of the annular block (4) is provided with a rectangular groove (5) that is adapted to the rectangular slide bar (3). The annular block (4) moves back and forth along the axis of the protective cylinder (2) through the sliding cooperation between the rectangular slide bar (3) and the rectangular groove (5).

6. A spraying device for the cutting section of a tunneling machine according to claim 1, characterized in that, The annular block (4) has an annular groove (6) on its front end face. An annular slider (10) is embedded in the annular groove (6). The annular slider (10) is fixedly connected to the rear end face of the annular shell (7), so that the annular shell (7) and the annular block (4) are rotatably connected.

7. A spraying device for the cutting section of a tunneling machine according to claim 1, characterized in that, An external connecting pipe (12) is fixedly connected to the annular water pipe (9). The external connecting pipe (12) extends through to the outside of the annular shell (7). An inlet pipe (13) is fixed on the end plate (1) at the position corresponding to the external connecting pipe (12).

8. A spraying device for the cutting section of a tunneling machine according to claim 7, characterized in that, One end of the water inlet pipe (13) is connected to an external water source, and the other end is connected to a hose (14) via a quick connector. The other end of the hose (14) is fixedly connected to an external connecting pipe (12) via a quick connector and a redundancy is reserved for the movement of the adaptable annular block (4). A pump body is connected in series between the water inlet pipe (13) and the external water source.

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