Cantilevered roadheader

Abstract

The utility model discloses a kind of tunneling machines of cantilever, including tunneling machine main body and machine arm being set on tunneling machine main body, the machine arm is fixedly connected with support, support is fixedly installed with spray disc, spray disc one end is fixedly connected with the spherical shell with hollow structure, the spray disc is opened with circumferentially distributed large-diameter spray hole and small-diameter spray hole, the number of small-diameter spray hole and large-diameter spray hole is same and cross distribution, large-diameter spray hole and small-diameter spray hole are communicated with spherical shell arrangement, the spherical shell inside is provided with the sealing assembly for intermittently plugging all large-diameter spray holes or all small-diameter spray holes. In the utility model, liquid is input into spherical shell by infusion assembly, then is sprayed out with different pressure through all large-diameter spray holes or all small-diameter spray holes, all large-diameter spray holes or all small-diameter spray holes are intermittently plugged by rotatable sealing plate, so that different spraying modes are used in different environments.

Description

Technical Field

[0001] This utility model relates to the field of tunneling machine technology, specifically a cantilever tunneling machine. Background Technology

[0002] A cantilever tunneling machine is a type of roadway excavation equipment with a swingable cantilever cutting mechanism at its core. It is widely used in coal mines, metal mines, tunnel engineering, and other fields, and is especially suitable for excavating medium and small cross-section (usually 2㎡-20㎡) rock tunnels and semi-coal-rock tunnels. It has a compact structure, high mobility, and can adapt to complex geological conditions (such as soft rock and fractured zones).

[0003] During operation, the high-speed collision between the cutting head and the rock and coal seam of the cantilever tunneling machine generates a large amount of dust (especially in dry operation, the dust concentration can reach more than 1000mg / m³), which not only endangers the health of the operators, but may also cause explosion risks. However, the nozzle diameter of the traditional spray dust suppression structure is single, which cannot adapt to changes in the working conditions on site and has poor flexibility. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a cantilever tunneling machine that solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cantilever tunneling machine, comprising a tunneling machine body and a boom mounted on the tunneling machine body, a support fixedly connected to the boom, a spray disc fixedly mounted on the support, a spherical shell with a hollow structure fixedly connected to one end of the spray disc, large-diameter spray holes and small-diameter spray holes circumferentially distributed on the spray disc, the number of small-diameter spray holes and large-diameter spray holes being the same and intersecting, both large-diameter spray holes and small-diameter spray holes communicating with the spherical shell, and a sealing component provided inside the spherical shell for intermittently sealing all large-diameter spray holes or all small-diameter spray holes.

[0006] Preferably, the sealing assembly includes a sealing plate and a rotating shaft fixed at the center of the sealing plate. The sealing plate abuts against the end sidewall of the spray disc. The sealing plate can intermittently block all large-diameter spray holes or all small-diameter spray holes. The end of the rotating shaft away from the sealing plate extends through to the outside of the spherical shell and is fixedly connected to a rotating wheel. The rotating shaft is rotatably mounted on the spherical shell through a bearing.

[0007] Preferably, two screw holes are provided on the circumferential sidewall of the rotor, and the two screw holes correspond to the positions of the large-diameter spray hole and the small-diameter spray hole, respectively. A horizontally arranged support block is fixedly connected to the spherical shell, and a through hole is provided on the support block. A bolt is provided in the through hole, and the threaded end of the bolt can be threaded into one of the screw holes.

[0008] Preferably, the arm is also provided with an infusion assembly for delivering liquid into the spherical shell.

[0009] Preferably, the infusion assembly includes a water tank fixedly installed on the machine arm, a water pump fixedly installed at the bottom of the water tank, a hose fixedly connected to the outlet end of the water pump, and the other end of the hose communicating with the ball shell.

[0010] Preferably, the water tank has a liquid inlet on the top, and a sealing cap may be provided at the liquid inlet.

[0011] This utility model provides a cantilever tunneling machine, which has the following advantages:

[0012] In this invention, liquid is introduced into the spherical shell through a liquid delivery assembly, and then sprayed out at different pressures through all large-diameter orifices or all small-diameter orifices. A rotatable sealing plate can intermittently seal all large-diameter orifices or all small-diameter orifices, thus allowing for different spraying methods in different environments. For example, in low-dust scenarios (such as near personnel work areas), the orifice diameter can be reduced to achieve efficient dust suppression with fine mist while minimizing excessive water spraying (avoiding impact on equipment operation or personnel movement). In cases of sudden changes in dust concentration (such as a surge in dust when a tunneling machine cuts hard rock), the orifice diameter can be increased (increasing the spray flow rate) or a combination of adjustments can be made (enlarging some orifices while keeping others small) to quickly increase the mist coverage and suppress dust diffusion. Attached Figure Description

[0013] Figure 1 This is a front-view three-dimensional structural diagram of a cantilever tunneling machine proposed in this utility model;

[0014] Figure 2 This is a partial structural diagram of a cantilever tunneling machine proposed in this utility model;

[0015] Figure 3 for Figure 2 Rear view structural diagram;

[0016] Figure 4 for Figure 2 Cross-sectional structural diagram;

[0017] Figure 5 for Figure 3 Enlarged structural diagram at point A;

[0018] Figure 6 This is a structural diagram of a sealing plate for a cantilever tunneling machine proposed in this utility model.

[0019] In the diagram: 1. Water tank; 101. Liquid inlet; 2. Spray disc; 201. Large diameter spray hole; 202. Small diameter spray hole; 3. Spherical shell; 4. Hose; 5. Water pump; 6. Support; 7. Sealing plate; 8. Shaft; 9. Rotary wheel; 901. Screw hole; 10. Support block; 1001. Through hole; 11. Bolt; 12. Tunneling machine body; 1201. Arm. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1 to 6 This utility model provides a technical solution: a cantilever tunneling machine, including a tunneling machine body 12 and a boom 1201 mounted on the tunneling machine body 12, which is a structure integrated into the tunneling machine; a bracket 6 is fixedly connected to the boom 1201, and a spray plate 2 is fixedly installed on the bracket 6. A spherical shell 3 with a hollow structure is fixedly connected to one end of the spray plate 2. The spray plate 2 has circumferentially distributed large-diameter spray holes 201 and small-diameter spray holes 202. The number of small-diameter spray holes 202 and large-diameter spray holes 201 are the same and they are distributed in a cross pattern. Both large-diameter spray holes 201 and small-diameter spray holes 202 are connected to the spherical shell 3. A sealing component is provided inside the spherical shell 3 for intermittently sealing all large-diameter spray holes 201 or all small-diameter spray holes 202.

[0022] The sealing assembly can intermittently seal all large-diameter nozzles 201 or all small-diameter nozzles 202. That is, when the large-diameter nozzles 201 are open, the small-diameter nozzles 202 are closed; when the large-diameter nozzles 201 are closed, the small-diameter nozzles 202 are open. This allows for different spraying methods to be used in different environments. For example, in low-dust scenarios (such as near personnel work areas), the nozzle diameter can be reduced to achieve efficient dust suppression with fine mist while reducing the dampness caused by excessive water spraying (avoiding impact on equipment operation or personnel movement). In cases of sudden changes in dust concentration (such as a surge in dust when a tunneling machine is cutting hard rock), the nozzle diameter can be increased (increasing the spray flow rate) or a combination of adjustments can be made (enlarging some nozzles and keeping others small) to quickly increase the mist coverage and suppress dust diffusion.

[0023] Specifically, the sealing assembly includes a sealing plate 7 and a rotating shaft 8 fixed at the center of the sealing plate 7. The sealing plate 7 abuts against the end side wall of the spray disc 2. The sealing plate 7 can intermittently block all large-diameter spray holes 201 or all small-diameter spray holes 202. The end of the rotating shaft 8 away from the sealing plate 7 extends through to the outside of the spherical shell 3 and is fixedly connected to a rotating wheel 9. The rotating shaft 8 is rotatably mounted on the spherical shell 3 through a bearing.

[0024] By driving the rotating wheel 9 to rotate, the rotating wheel 9 drives the sealing plate 7 to rotate via the rotating shaft 8. The sealing plate 7 can intermittently block all large-diameter nozzles 201 or all small-diameter nozzles 202; see reference. Figure 4 and Figure 6 The sealing plate 7 has multiple circumferentially distributed extended shielding portions, the number of which is the same as the number of large-diameter nozzles 201.

[0025] At the point where the shaft 8 passes through the ball housing 3 (i.e., where the bearing is installed), a special sealing structure is required, such as an O-ring (made of fluororubber, which is wear-resistant and aging-resistant), to prevent fluids inside the ball housing 3 (such as high-pressure water or dust-laden gas-liquid mixtures) from leaking through the gap between the shaft 8 and the ball housing 3, while also preventing external impurities (such as dust and mud) from entering the bearing and affecting its rotational accuracy.

[0026] In addition, in order to lock the angle of the rotor 9, two screw holes 901 are opened on the circumferential side wall of the rotor 9. The two screw holes 901 correspond to the positions of the large-diameter nozzle 201 and the small-diameter nozzle 202, respectively. A horizontally arranged support block 10 is fixedly connected to the spherical shell 3. A through hole 1001 is opened on the support block 10. A bolt 11 is installed in the through hole 1001. The threaded end of the bolt 11 can be threaded into one of the screw holes 901.

[0027] When the threaded end of the bolt 11 is inserted into one of the threaded holes 901, the angle of the roller 9 is locked, that is, the angle of the sealing plate 7 is locked and will not shift. All large-diameter nozzles 201 or all small-diameter nozzles 202 completely block the medium flow path.

[0028] The arm 1201 is also equipped with an infusion assembly, which is used to deliver liquid into the spherical shell 3.

[0029] The infusion assembly includes a water tank 1 fixedly installed on the arm 1201. A water pump 5 is fixedly installed at the bottom of the water tank 1. A hose 4 is fixedly connected to the outlet end of the water pump 5. The other end of the hose 4 is connected to the ball shell 3.

[0030] By starting the water pump 5, the liquid inside the water tank 1 is drawn into the hose 4, then into the spherical shell 3, and finally sprayed out through all the large-diameter nozzles 201 or all the small-diameter nozzles 202 on the spray plate 2.

[0031] The top of the water tank 1 is provided with a liquid inlet 101, and a sealing cap may be installed at the liquid inlet 101.

[0032] The diameter of the liquid inlet 101 is usually 50-100mm (for easy and quick filling of clean water). The sealing cap is installed by thread and a rubber sealing ring is set at the bottom of the sealing cap. This can prevent liquid from splashing out (especially when the equipment is moved) and also prevent external dust from falling into the water tank 1 and contaminating the liquid (to avoid clogging the subsequent hose 4 or spray hole).

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cantilever tunneling machine, characterized in that: The machine includes a tunneling machine body (12) and a boom (1201) mounted on the tunneling machine body (12). A bracket (6) is fixedly connected to the boom (1201). A spray disc (2) is fixedly installed on the bracket (6). A spherical shell (3) with a hollow structure is fixedly connected to one end of the spray disc (2). The spray disc (2) has circumferentially distributed large-diameter spray holes (201) and small-diameter spray holes (202). The number of small-diameter spray holes (202) and large-diameter spray holes (201) are the same and they are intersected. The large-diameter spray holes (201) and small-diameter spray holes (202) are all connected to the spherical shell (3). The spherical shell (3) is provided with a sealing component for intermittently sealing all large-diameter spray holes (201) or all small-diameter spray holes (202).

2. The cantilever tunneling machine according to claim 1, characterized in that: The sealing assembly includes a sealing plate (7) and a rotating shaft (8) fixed at the center of the sealing plate (7). The sealing plate (7) abuts against the end sidewall of the spray disc (2). The sealing plate (7) can intermittently block all large-diameter spray holes (201) or all small-diameter spray holes (202). The end of the rotating shaft (8) away from the sealing plate (7) extends through to the outside of the spherical shell (3) and is fixedly connected to a rotating wheel (9). The rotating shaft (8) is rotatably mounted on the spherical shell (3) through a bearing.

3. A cantilever tunneling machine according to claim 2, characterized in that: Two screw holes (901) are provided on the circumferential side wall of the wheel (9). The two screw holes (901) correspond to the positions of the large-diameter spray hole (201) and the small-diameter spray hole (202) respectively. A horizontally arranged support block (10) is fixedly connected to the spherical shell (3). A through hole (1001) is provided on the support block (10). A bolt (11) is provided in the through hole (1001). The threaded end of the bolt (11) can be threaded into one of the screw holes (901).

4. A cantilever tunneling machine according to claim 1, characterized in that: The arm (1201) is also equipped with an infusion assembly, which is used to deliver liquid into the spherical shell (3).

5. A cantilever tunneling machine according to claim 4, characterized in that: The infusion assembly includes a water tank (1) fixedly installed on the arm (1201), a water pump (5) fixedly installed at the bottom of the water tank (1), a hose (4) fixedly connected to the outlet end of the water pump (5), and the other end of the hose (4) connected to the ball shell (3).

6. A cantilever tunneling machine according to claim 5, characterized in that: The water tank (1) has an inlet (101) on the top, and a sealing cap can be installed at the inlet (101).

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