Station switching device

Abstract

The station switching device comprises a mounting seat, a first rotating plate rotationally connected with the mounting seat, a second rotating plate rotationally connected with the first rotating plate, and a driving mechanism. The free end of the first rotating plate is provided with a spray pipe hole used for installing an anchoring agent spray pipe, and the axis of the spray pipe hole is parallel to the rotating center axis of the first rotating plate. The free end of the second rotating plate is provided with a drill rod hole used for conducting radial positioning on a rock drill rod, and the axis of the drill rod hole is parallel to the rotating center axis of the second rotating plate. The driving mechanism is used for driving the first rotating plate to rotate relative to the mounting base and driving the second rotating plate to rotate relative to the first rotating plate, so that the working positions of the spray pipe hole and the drill rod hole are switched. The device has the advantages that automatic hole alignment of the drill rod and the spray pipe can be achieved, the structure is simple, the control method is simple, the control precision is high, drilling, anchor rod installation and grouting states are freely switched, and drilling operation and grouting operation cannot interfere with each other.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel anchor rod support technical field, concretely relates to a station switching device. BACKGROUND

[0002] In the surrounding rock support engineering, the anchor rod reinforcement technology as a core link plays a vital role for ensuring the stability and safety of the surrounding rock. This technology not only needs to strictly follow the hole layout positioning requirements on the construction drawing, but also relies on a series of precise construction steps and efficient professional equipment.

[0003] Specifically, the anchor rod reinforcement operation first needs to mark the position of the preset hole on the surrounding rock according to the design drawing. Then, the construction personnel will use the drilling equipment to accurately drill the anchor rod hole on the surrounding rock that meets the design requirements. After the drilling operation is completed, the anchor rod installation device needs to be used to inject the anchoring agent into the drilled operation hole. The anchoring agent as the bonding material between the anchor rod and the surrounding rock directly affects the reinforcement effect of the anchor rod in quality and injection mode. Finally, the anchor rod is placed into the operation hole that has been injected with the anchoring agent.

[0004] However, in the traditional construction process, since multiple equipment needs to be staged into the operation site, including the drilling equipment, the anchor rod installation equipment and the grouting equipment, the construction process is relatively complicated. Especially in the process of aligning the preset hole of the surrounding rock, the construction personnel need to use the drilling equipment and the anchor rod installation equipment to repeatedly align and adjust the same preset hole, which not only increases the difficulty and complexity of the construction, but also easily leads to the decrease of the construction precision and the reduction of the construction efficiency. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a station switching device installed on the drilling anchor equipment pushing beam, which can realize automatic hole alignment of the grouting device nozzle, has simple structure, simple control method, high control precision, free switching of drilling, anchor rod installation and grouting states, and the drilling operation and the grouting operation will not interfere with each other.

[0006] In order to solve the above technical problems, the technical scheme provided by the utility model is a station switching device, which at least comprises a mounting seat, a first rotating plate rotatably connected with the mounting seat, a second rotating plate rotatably connected with the first rotating plate, and a driving mechanism.

[0007] The free end of the first rotating plate is provided with a nozzle hole for installing the anchoring agent nozzle, and the nozzle hole axis is arranged in parallel with the first rotating plate rotation center shaft.

[0008] The free end of the second rotating plate is provided with a drill rod hole for radially positioning the rock drill drill rod, and the drill rod hole axis is arranged in parallel with the second rotating plate rotation center shaft.

[0009] The driving mechanism is used to drive the first rotating plate to rotate relative to the mounting base, and the second rotating plate to rotate relative to the first rotating plate, so as to switch the working positions of the nozzle hole and the drill rod hole.

[0010] In a preferred embodiment, the station switching device has:

[0011] The drill rod hole is coaxial with the pre-set hole of the surrounding rock, and the nozzle hole is misaligned with the pre-set hole of the surrounding rock in the drilling state;

[0012] The drill rod hole is misaligned with the pre-set hole of the surrounding rock, and the nozzle hole is coaxial with the pre-set hole of the surrounding rock in the grouting state;

[0013] The drill rod hole is misaligned with the pre-set hole of the surrounding rock, and the nozzle hole is misaligned with the pre-set hole of the surrounding rock in the anchor rod installation state;

[0014] The driving mechanism is used to drive the station switching device to switch among the drilling state, the grouting state, and the anchor rod installation state.

[0015] In a preferred embodiment, the driving mechanism includes a first driving element mounted on the mounting base and having an output end connected to the first rotating plate, and a second driving element mounted on the first rotating plate and having an output end connected to the second rotating plate.

[0016] In a preferred embodiment, the first rotating plate is provided with a propelling mechanism matched with the nozzle hole, and an output end of the propelling mechanism is fixedly connected to the anchor agent nozzle.

[0017] When the station switching device is in the grouting state, the propelling mechanism is used to push the anchor agent nozzle to move axially along the nozzle hole and extend into the pre-set hole of the surrounding rock for grouting.

[0018] In a preferred embodiment, the center axis of rotation of the first rotating plate is on the same axis as the center axis of rotation of the second rotating plate.

[0019] In a preferred embodiment, the distance between the axis of the drill rod hole and the center axis of rotation of the first rotating plate is the same as the distance between the axis of the nozzle hole and the center axis of rotation of the second rotating plate.

[0020] In a preferred embodiment, the first rotating plate is provided with a first rotating shaft at the connection position of the output end of the first driving element and the first rotating plate, and the output end of the first driving element is rotatably connected to the first rotating plate through the first rotating shaft.

[0021] The first rotating shaft and the nozzle hole are located on two sides of the rotating center of the first rotating plate respectively, and the distance between the first rotating shaft and the rotating center of the first rotating plate is smaller than the distance between the nozzle hole and the rotating center of the first rotating plate.

[0022] In a preferred embodiment, the second rotating plate is connected with the output end of the second driving element through a second rotating shaft.

[0023] The drill rod hole and the rotating center of the second rotating plate are located on two sides of the second rotating shaft respectively, and the distance between the drill rod hole and the second rotating shaft is smaller than the distance between the rotating center of the second rotating plate and the second rotating shaft.

[0024] In a preferred embodiment, the first rotating plate comprises a rotating plate one and a rotating plate two arranged in parallel, and a clearance slot adapted to the second rotating plate is formed between the rotating plate one and the rotating plate two.

[0025] In a preferred embodiment, the mounting seat comprises a first mounting plate and a second mounting plate arranged in parallel, an installation cavity is formed between the first mounting plate and the second mounting plate, the first driving element is installed in the installation cavity, and the second mounting plate is provided with a plurality of outwardly extending conical teeth.

[0026] Compared with the prior art, the work station switching device has the following beneficial effects:

[0027] (1) The work station switching device comprises a mounting seat, a first rotating plate rotatably connected with the mounting seat, a second rotating plate rotatably connected with the first rotating plate, and a driving mechanism. The mounting seat is used for fixedly connecting with a push beam of a drilling and anchoring equipment. The work station switching device is installed on the drilling and anchoring equipment through the mounting seat, so that the switching of the work station is realized. The fixed connection of the mounting seat and the push beam of the drilling and anchoring equipment ensures the stability and reliability of the work station switching device in the working process. The work station switching device is provided with a nozzle hole for installing an anchor agent nozzle. On the one hand, the design of the nozzle hole enables the anchor agent nozzle to be firmly installed on the device, ensuring the accurate injection of the anchor agent. On the other hand, in the grouting state, the nozzle hole is coaxial with a surrounding rock pre-set hole, ensuring that the anchor agent can be uniformly and accurately filled into the anchor rod hole, improving the reinforcement effect of the anchor rod. The work station switching device is also provided with a drill rod hole for radially positioning a drill rod of a rock drill. On the one hand, the design of the drill rod hole enables the drill rod of the rock drill to be accurately positioned at the position of the surrounding rock pre-set hole, ensuring the accuracy and precision of the drilling. On the other hand, in the drilling state, the drill rod hole is coaxial with the surrounding rock pre-set hole, ensuring the smooth drilling and the control of the drilling quality.

[0028] (2)The work station switching device has a drilling state, a grouting state and an anchor rod installation state. The drill rod hole is coaxial with the surrounding rock pre-set hole, and the spray pipe hole is misaligned with the surrounding rock pre-set hole in the drilling state, which ensures the smooth progress of the drilling operation, avoids the interference of the anchor agent spray pipe on the drilling operation, and improves the efficiency and accuracy of the drilling operation. The drill rod hole is misaligned with the surrounding rock pre-set hole, and the spray pipe hole is coaxial with the surrounding rock pre-set hole in the grouting state. Such a structure design enables rapid switching to the grouting state after drilling is completed, injection of the anchor agent is carried out, the grouting operation speed is accelerated, accurate injection of the anchor agent is ensured, and the reinforcement effect of the anchor rod is improved. The drill rod hole is misaligned with the surrounding rock pre-set hole, and the spray pipe hole is misaligned with the surrounding rock pre-set hole in the anchor rod installation state. Such a structure design enables rapid switching to the anchor rod installation state after grouting is completed, the anchor rod is placed, the anchor rod installation process is simplified, the construction efficiency is improved, the accurate placement and reinforcement effect of the anchor rod are ensured. The driving mechanism is used to drive the work station switching device to switch among the drilling state, the grouting state and the anchor rod installation state. The functions of drilling, grouting and anchor rod installation are integrated, the driving mechanism is switched among different states, a single device can complete multiple operations, the construction process is greatly simplified, the problem that the construction personnel need to use the drilling device and the anchor rod installation device to repeatedly align and adjust the same pre-set hole in the traditional construction, which easily leads to a decrease in construction accuracy, is solved, and the construction efficiency is significantly improved. A single device can complete multiple operations, the time for equipment switching and debugging is reduced, the construction progress is accelerated, the integrated structure design is adopted, the handover and movement between devices are reduced, the safety hidden danger in the construction process is reduced, and the stability and safety of the construction process are ensured.

[0029] (3)The work station switching device of the utility model, the first rotary plate rotation center axis and the second rotary plate rotation center axis are on the same axis, the distance between the spray pipe hole axis and the first rotary plate rotation center axis is the same as the distance between the drill rod hole axis and the second rotary plate rotation center axis. On the one hand, the switching of the work station switching device among the drilling state, the grouting state and the anchor rod installation state is smoother, this design reduces the adjustment time and steps during state switching, improves the construction efficiency; on the other hand, since the two distances are the same, the control logic can be simplified. The control system only needs to switch the rotary plate position according to the operation state, without considering the additional adjustment caused by the distance difference, which reduces the complexity and cost of the control system, improves the reliability and usability of the device.

[0030] (4) In the workstation switching device of this utility model, the first rotating shaft and the nozzle hole are located on both sides of the rotation center of the first rotating plate, which balances the force on the first rotating plate during rotation. This structural design can reduce the deformation or damage of the first rotating plate caused by uneven force, and extend the service life of the equipment. The distance between the first rotating shaft and the rotation center of the first rotating plate is smaller than the distance between the nozzle hole and the rotation center of the first rotating plate. On the one hand, because the first rotating shaft is closer to the rotation center of the first rotating plate, and the torque generated by the nozzle (or other components connected to the nozzle hole) during operation is relatively small, this helps to reduce the driving torque required by the first driving element, making the driving system more efficient and reducing energy consumption and equipment wear. On the other hand, the nozzle hole is farther from the rotation center, which means that under the same rotation angle, the nozzle can cover a larger working range. This structural design improves the rotational flexibility of the first rotating plate, enabling the equipment to adapt to more diverse working scenarios and needs.

[0031] A second rotating shaft is located at the connection point between the second rotating plate and the output end of the second driving element. The output end of the second driving element is rotatably connected to the second rotating plate via the second rotating shaft. The drill rod hole and the rotation center of the second rotating plate are located on opposite sides of the second rotating shaft, and the distance between the drill rod hole and the second rotating shaft is less than the distance between the rotation center of the second rotating plate and the second rotating shaft. The drill rod hole provides radial positioning for the drill rod of the rock drill during drilling. Since the rock drill experiences significant reaction force during operation, the design of having the drill rod hole close to the second rotating shaft reduces the torque generated by the drill rod, thus improving system stability. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the workstation switching device of this utility model;

[0033] Figure 2 This is a schematic diagram of the installation structure of the workstation switching device and the push beam, according to an embodiment of the workstation switching device of this utility model.

[0034] Figure 3 This is a schematic diagram of the workstation switching device in the drilling state, according to an embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the workstation switching device in the grouting state, according to an embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of the workstation switching device in the anchor bolt installation state, which is an embodiment of the workstation switching device of this utility model.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Mounting base; 11-First mounting plate; 12-Second mounting plate; 13-Mounting cavity; 14-Conical tooth; 2-Drive mechanism; 21-First driving element; 22-Second driving element; 3-First rotating plate; 31-Nozzle hole; 32-Propulsion mechanism; 33-First rotating shaft; 34-Rotating plate one; 35-Rotating plate two; 36-Relief groove; 4-Second rotating plate; 41-Drill rod hole; 42-Second rotating shaft;

[0039] 5- Drilling and anchoring equipment propulsion beam;

[0040] 6- Rock drill rod;

[0041] 7-Anchoring agent nozzle. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0043] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., 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.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] One example of this embodiment is a workstation switching device, such as... Figure 1 and Figure 2 As shown, it includes at least a mounting base 1 fixedly connected to the drilling and anchoring equipment's propulsion beam, and a drive mechanism 2. In this embodiment, the workstation switching device is mounted on the drilling and anchoring equipment via the mounting base, thereby enabling workstation switching. The fixed connection between the mounting base and the drilling and anchoring equipment's propulsion beam ensures the stability and reliability of the workstation switching device during operation.

[0046] The workstation switching device in this embodiment is provided with a nozzle hole 31 for installing the anchoring agent nozzle 7. On the one hand, the design of the nozzle hole allows the anchoring agent nozzle to be firmly installed on the device, ensuring accurate injection of the anchoring agent; on the other hand, in the grouting state, the nozzle hole is coaxial with the pre-set hole of the surrounding rock, ensuring that the anchoring agent can be filled into the anchor bolt hole evenly and accurately, improving the reinforcement effect of the anchor bolt.

[0047] The workstation switching device in this embodiment is also provided with a drill rod hole 41 for radial positioning of the rock drill rod 6. On the one hand, the design of the drill rod hole enables the rock drill rod to be accurately positioned at the location of the preset hole in the surrounding rock, ensuring the accuracy and precision of drilling; on the other hand, in the drilling state, the drill rod hole is coaxial with the preset hole in the surrounding rock, ensuring smooth drilling and control of drilling quality.

[0048] like Figure 3 , Figure 4 and Figure 5 As shown, the workstation switching device has:

[0049] The drilling state in which the drill rod hole 41 is coaxial with the pre-set hole in the surrounding rock and the nozzle hole 31 is misaligned with the pre-set hole in the surrounding rock ensures the smooth progress of drilling operations, while avoiding interference from the anchoring agent nozzle on drilling operations, thus improving the efficiency and accuracy of drilling operations.

[0050] The drill rod hole 41 is misaligned with the pre-drilled hole in the surrounding rock, while the nozzle hole 31 is coaxial with the pre-drilled hole in the surrounding rock. This structural design allows for a rapid switch to grouting mode after drilling is completed, enabling the injection of anchoring agent. This speeds up the grouting operation, ensures accurate injection of anchoring agent, and improves the reinforcement effect of the anchor rod.

[0051] The anchor installation state with the drill rod hole 41 misaligned with the pre-drilled hole in the surrounding rock and the nozzle hole 31 misaligned with the pre-drilled hole in the surrounding rock, adopts such a structural design, which allows for a quick switch to the anchor installation state after grouting is completed, and the anchor is inserted, which simplifies the anchor installation process, improves construction efficiency, and ensures accurate insertion and reinforcement effect of the anchor.

[0052] The drive mechanism 2 is used to switch the workstation switching device between drilling, grouting, and anchor bolt installation states. Integrating drilling, grouting, and anchor bolt installation functions, the drive mechanism allows a single device to complete multiple tasks by switching between different states, greatly simplifying the construction process. It also solves the problem in traditional construction where workers need to repeatedly align and adjust the same pre-set hole using drilling and anchor bolt installation equipment, which can easily lead to a decrease in construction accuracy, significantly improving construction efficiency. A single device can complete multiple tasks, reducing equipment switching and debugging time, accelerating the construction progress. Furthermore, this integrated structural design reduces the handover and movement between devices, lowering safety hazards during construction and ensuring the stability and safety of the construction process.

[0053] The workstation switching device also includes a first rotating plate 3 rotatably connected to the mounting base 1. The nozzle hole 31 is located at the free end of the first rotating plate, and the axis of the nozzle hole is parallel to the rotation center axis of the first rotating plate. The drive mechanism 2 includes a first drive element 21 mounted on the mounting base 1 and connected to the first rotating plate at its output end. The first drive element is used to drive the first rotating plate to rotate relative to the mounting base.

[0054] The workstation switching device also includes a second rotating plate 4 rotatably connected to the first rotating plate. The drill rod hole 41 is located at the free end of the second rotating plate, and the axis of the drill rod hole is parallel to the rotation center axis of the second rotating plate. The drive mechanism 2 also includes a second drive element 22 mounted on the first rotating plate and connected to the second rotating plate at its output end. The second drive element is used to drive the second rotating plate to rotate relative to the first rotating plate.

[0055] Preferably, the first rotating plate 3 is equipped with a propulsion mechanism 32 that matches the nozzle hole 31, and the output end of the propulsion mechanism is fixedly connected to the anchoring agent nozzle. When the work position switching device is in the grouting state, the propulsion mechanism 32 is used to push the anchoring agent nozzle to move axially along the nozzle hole 31 and extend into the pre-drilled hole in the surrounding rock for grouting.

[0056] Preferably, the rotation center axis of the first rotating plate and the rotation center axis of the second rotating plate are on the same axis. The distance between the nozzle hole axis and the rotation center axis of the first rotating plate is the same as the distance between the drill rod hole axis and the rotation center axis of the second rotating plate. On the one hand, the switching between drilling, grouting and anchor bolt installation states is smoother, reducing adjustment time and steps during state switching and improving construction efficiency. On the other hand, since the two distances are the same, the control logic can be simplified. The control system only needs to switch the corresponding rotating plate position according to the working state, without considering the additional adjustments caused by distance differences, reducing the complexity and cost of the control system and improving the reliability and ease of use of the device.

[0057] In this embodiment, asFigure 4 As shown, a first rotating shaft 33 is provided at the connection position between the first rotating plate 3 and the output end 21 of the first driving element. The output end of the first driving element is rotatably connected to the first rotating plate through the first rotating shaft 33. The first rotating shaft 33 and the nozzle hole 31 are located on both sides of the rotation center of the first rotating plate, balancing the force on the first rotating plate during rotation. This structural design can reduce deformation or damage to the first rotating plate caused by uneven force, extending the service life of the equipment. The distance between the first rotating shaft and the rotation center of the first rotating plate is smaller than the distance between the nozzle hole and the rotation center of the first rotating plate. On the one hand, because the first rotating shaft is closer to the rotation center of the first rotating plate, and the torque generated by the nozzle (or other components connected to the nozzle hole) during operation is relatively small, this helps to reduce the driving torque required by the first driving element, making the drive system more efficient and reducing energy consumption and equipment wear. On the other hand, the nozzle hole is farther from the rotation center, meaning that at the same rotation angle, the nozzle can cover a larger working range. This structural design improves the rotational flexibility of the first rotating plate, enabling the equipment to adapt to more diverse working scenarios and needs.

[0058] In this embodiment, as Figure 3 As shown, a second rotating shaft 42 is provided at the connection position between the second rotating plate 4 and the output end 22 of the second driving element. The output end of the second driving element is rotatably connected to the second rotating plate through the second rotating shaft 42. The drill rod hole 41 and the rotation center of the second rotating plate are located on opposite sides of the second rotating shaft, and the distance between the drill rod hole and the second rotating shaft is less than the distance between the rotation center of the second rotating plate and the second rotating shaft. The drill rod hole provides radial positioning for the drill rod of the rock drill during drilling. The rock drill has a large reaction force during operation. By adopting a structural design where the drill rod hole is close to the second rotating shaft, the torque generated by the drill rod of the rock drill is reduced, and the stability of the system is improved.

[0059] Preferably, the first rotating plate 3 includes a first rotating plate 34 and a second rotating plate 35 arranged in parallel. A clearance groove 36 adapted to the second rotating plate is formed between the first rotating plate and the second rotating plate. With this structural design, the second rotating plate can rotate relative to the first rotating plate and enter the clearance groove. On the one hand, it effectively avoids the movement interference between the first rotating plate and the second rotating plate; on the other hand, the structure is simple and compact.

[0060] Preferably, the mounting base 1 includes a first mounting plate 11 and a second mounting plate 12 arranged in parallel, with a mounting cavity 13 formed between the first mounting plate and the second mounting plate. The first driving element is installed in the mounting cavity, and the second mounting plate is provided with a plurality of outwardly extending conical teeth 14.

[0061] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A station change device, characterized by: At least comprising a mounting base (1), a first rotating plate (3) rotatably connected with the mounting base (1), a second rotating plate (4) rotatably connected with the first rotating plate, and a driving mechanism (2); A free end of the first rotating plate (3) is provided with a nozzle hole (31) for mounting an anchor agent nozzle, and an axis of the nozzle hole (31) is arranged in parallel with a rotating center axis of the first rotating plate; A free end of the second rotating plate is provided with a drill rod hole (41) for radially positioning a drill rod of a rock drill, and an axis of the drill rod hole is arranged in parallel with a rotating center axis of the second rotating plate; The driving mechanism (2) is used for driving the first rotating plate (3) to rotate relative to the mounting base (1), and driving the second rotating plate (4) to rotate relative to the first rotating plate (3), so as to switch working positions of the nozzle hole (31) and the drill rod hole (41).

2. A station switching device according to claim 1, characterised in that: The station switching device has: The drill rod hole (41) is coaxial with a preset hole of surrounding rock, and the nozzle hole (31) is in a drilling state of being dislocated with the preset hole of surrounding rock; The drill rod hole (41) is dislocated with a drilling hole of the preset hole of surrounding rock, and the nozzle hole (31) is in a grouting state of being coaxial with the drilling hole of the preset hole of surrounding rock; The drill rod hole (41) is dislocated with the drilling hole of the preset hole of surrounding rock, and the nozzle hole (31) is in an anchor rod installation state of being dislocated with the drilling hole of the preset hole of surrounding rock; The driving mechanism (2) is used for driving the station switching device to switch among the drilling state, the grouting state and the anchor rod installation state.

3. A station switching device according to claim 2, characterised in that: The driving mechanism (2) comprises a first driving element (21) mounted on the mounting base (1) and having an output end connected with the first rotating plate, and a second driving element (22) mounted on the first rotating plate and having an output end connected with the second rotating plate.

4. A station switching device according to claim 3, characterised in that: The first rotating plate (3) is provided with a propelling mechanism (32) matched with the nozzle hole (31), and an output end of the propelling mechanism is fixedly connected with the anchor agent nozzle; When the station switching device is in the grouting state, the propelling mechanism (32) is used for propelling the anchor agent nozzle to move along the nozzle hole (31) in an axial direction and extend into the drilling hole of the preset hole of surrounding rock to grout.

5. A station changeover device according to claim 3 or 4, characterised in that: The rotating center axis of the first rotating plate and the rotating center axis of the second rotating plate are on the same axis.

6. A station switching device according to claim 5, characterised in that: A distance between the nozzle hole axis and the rotating center axis of the first rotating plate is the same as a distance between the drill rod hole axis and the rotating center axis of the second rotating plate.

7. A station change apparatus according to claim 4 or 6, characterized in that: A connecting position of the first rotating plate (3) with an output end of the first driving element (21) is provided with a first rotating shaft (33), and the output end of the first driving element is rotatably connected with the first rotating plate through the first rotating shaft (33); The first rotating shaft (33) and the nozzle hole (31) are located on two sides of the rotating center of the first rotating plate respectively, and a distance between the first rotating shaft and the rotating center of the first rotating plate is smaller than a distance between the nozzle hole and the rotating center of the first rotating plate.

8. A station switching device according to claim 7, characterised in that: The connecting position of the second rotating plate (4) and the output end of the second driving element (22) is provided with a second rotating shaft (42), and the output end of the second driving element is rotatably connected with the second rotating plate through the second rotating shaft (42); The drill rod hole (41) and the rotation center of the second rotating plate are respectively located on the two sides of the second rotating shaft, and the distance between the drill rod hole and the second rotating shaft is less than the distance between the rotation center of the second rotating plate and the second rotating shaft.

9. A station changeover device according to claim 8, characterised in that: The first rotating plate (3) comprises rotating plate one (34) and rotating plate two (35) arranged in parallel, and a gap (36) adapted to the second rotating plate is formed between the rotating plate one and the rotating plate two.

10. A station switching device according to any one of claims 1 to 4, 6 or 8, characterised in that: The mounting seat (1) comprises first mounting plate (11) and second mounting plate (12) arranged in parallel, and a mounting cavity (13) is formed between the first mounting plate and the second mounting plate, the first driving element is mounted in the mounting cavity, and the second mounting plate is provided with a plurality of outwardly extending conical teeth (14).

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