Hard rock tunnel boring machine

Abstract

The utility model relates to the technical field of heading machine parts, and discloses a hard rock tunnel boring machine which comprises a cutter head, a mounting shell, a mounting frame, an impact cutter bar, an impact block, a first reset piece and an impact mechanism. With the adoption of the structure, the impact block can be repeatedly impacted through the impact mechanism, so that the impact cutter bar is driven to slide on the mounting frame and continuously perform point impact on the integral surface of the rock, and the integral damage of the rock in a point-to-surface manner is realized; meanwhile, when the impact cutter bar is ejected out by the impact mechanism and is not reset, the impact cutter bar can slide on the rock from a damage point under the driving of rotation of the cutter head, and the integrity of the rock is further damaged; and the rock crushing efficiency is guaranteed by matching with the cutters on the cutterhead, the rock crushing difficulty of the cutters is reduced, and thus the cutter loss speed is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of roadheader components, specifically to a hard rock tunnel boring machine. Background Technique

[0002] At present, the construction of large-diameter tunnels at home and abroad often adopts the drill and blast method and the full-face hard rock tunnel boring machine (TBM). The drill and blast method has disadvantages such as high labor intensity, long construction period, and high danger. Using a full-face hard rock tunnel boring machine has the characteristics of fast, safe, and efficient construction, and is widely used in tunnels such as railways, water conservancy, and national defense in China.

[0003] However, during the tunneling construction process, when the roadheader encounters hard rocks, there are still problems such as low rock fragmentation efficiency and fast tool damage. Content of the Utility Model

[0004] The utility model mainly provides a hard rock tunnel boring machine to solve the problems of low rock fragmentation efficiency and fast tool damage when the roadheader encounters hard rocks.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] Hard rock tunnel boring machine, including a cutter head, on which a plurality of mounting shells are distributed. The end of the mounting shell is detachably connected with a mounting frame. A percussion cutter bar is slidably connected to the mounting frame. An impact block is arranged at the inner end of the percussion cutter bar. A first reset member is arranged between the impact block and the mounting frame. An impact mechanism is arranged in the mounting shell corresponding to the position behind the percussion cutter bar. The impact mechanism is used to impact the impact block outward. Among them, the mounting frame is detachably connected to the inside of the mounting shell, so that it can be replaced separately, and any existing detachable connection method can be adopted. During use, the impact mechanism can repeatedly impact the impact block, thereby driving the percussion cutter bar to impact outward to break the rock. When the percussion cutter bar is ejected by the impact mechanism and not reset, the percussion cutter bar can slide on the rock from the damage point driven by the rotation of the cutter head, further destroying the integrity of the rock. Then, after the impact mechanism is reset, the percussion cutter bar can be driven by the first reset member to reset inward. With the structure of the present application, the impact mechanism can repeatedly impact the impact block, thereby driving the percussion cutter bar to slide on the mounting frame and continuously impact the overall surface of the rock at points, realizing the overall damage of the rock from point to surface. At the same time, when the percussion cutter bar is ejected by the impact mechanism and not reset, it can slide on the rock from the damage point driven by the rotation of the cutter head, further destroying the integrity of the rock. And it cooperates with the cutters on the cutter head to ensure the efficiency of rock breaking, reduce the difficulty of the cutters breaking the rock, thereby reducing the speed of cutter loss. And the percussion cutter bar and the impact mechanism adopt a split design, which can reduce the impact on the impact mechanism when the percussion cutter bar is driven by the cutter head to slide on the rock, and can be replaced separately after the percussion cutter bar is damaged, reducing costs.

[0007] Further, the impact mechanism includes an electromagnet assembly arranged in the mounting shell. A fixed frame is arranged in the mounting shell corresponding to the position behind the electromagnet assembly. A striker is slidably connected between the fixed frame and the electromagnet assembly. A mating block is arranged on the striker at the position behind the fixed frame. A second reset member is arranged between the mating block and the fixed frame. A permanent magnet cooperating with the electromagnet is arranged on the striker. Among them, the electromagnet assembly can adopt any one of the existing technologies and can adsorb and push the permanent magnet after being energized. The striker is coaxially arranged with the percussion cutter bar. With this structure, under the action of the electromagnet assembly, the permanent magnet can be made to approach or move away from the electromagnet assembly, thereby driving the striker to slide on the electromagnet assembly and the fixed frame, so as to impact the impact block on the percussion cutter bar. The impact force can be realized by controlling the current magnitude of the electromagnet assembly. At the same time, the setting of the second reset member can accelerate and ensure the reset effect of the striker.

[0008] Further, a guide rod is provided between the electromagnet assembly and the fixed frame, and the permanent magnet is slidably connected to the guide rod. With this structure, the permanent magnet can be guided, thereby enhancing the stability of the overall structure.

[0009] Further, a plurality of connecting frames are circumferentially distributed on the cutter head, and mounting grooves are formed in the connecting frames. The mounting shell is detachably connected to the mounting grooves. Herein, "a plurality" refers to two or more. With this structure, the impact cutter bars can be distributed on the cutter head, thereby better damaging the rock; meanwhile, the arrangement of the mounting grooves can reduce the difficulty of aligning and installing the mounting shell.

[0010] Further, the connecting frame is detachably connected to the mounting shell by bolts. The bolts penetrate from the side of the connecting frame to the side of the mounting shell. The method of connecting the mounting shell and the connecting frame by bolts has a simple structure, stable connection, and is convenient for disassembly and assembly.

[0011] Beneficial effects: With the structure of the present application, the impact mechanism can repeatedly impact the impact block, thereby driving the impact cutter bar to slide on the mounting frame and continuously impact the overall surface of the rock at points, realizing the holistic destruction of the rock from point to surface. At the same time, when the impact cutter bar is ejected by the impact mechanism and not reset, it can slide on the rock from the damage point driven by the rotation of the cutter head, further destroying the integrity of the rock. And the cooperation with the cutters on the cutter head ensures the efficiency of rock crushing, reduces the difficulty of the cutters in crushing the rock, thereby realizing the reduction of the speed of cutter loss. In addition, the impact cutter bar and the impact mechanism adopt a split design, which can reduce the impact on the impact mechanism when the impact cutter bar is driven by the cutter head to slide on the rock, and can be replaced separately after the impact cutter bar is damaged, reducing costs. Description of the Drawings

[0012] Figure 1 It is a front view schematic diagram of the cutter head of this embodiment;

[0013] Figure 2 It is a side sectional schematic diagram of the connecting frame of this embodiment.

[0014] Reference numerals: cutter head 1, mounting shell 2, mounting frame 3, impact cutter bar 4, impact block 5, first reset member 6, electromagnet assembly 7, fixed frame 8, impact rod 9, mating block 10, second reset member 11, permanent magnet 12, guide rod 13, connecting frame 14. Detailed Embodiment

[0015] Hereinafter, the technical solution of the hard rock tunnel boring machine related to the present invention will be further described in detail with reference to the embodiments.

[0016] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0017] Such as Figure 1 、 Figure 2As shown in the figure, the hard rock tunnel boring machine of this embodiment includes a cutter head 1, on which a plurality of mounting shells 2 are distributed. The end of the mounting shell 2 is detachably connected to a mounting frame 3. A percussion cutter bar 4 is slidably connected to the mounting frame 3. An impact block 5 is arranged at the inner end of the percussion cutter bar 4. A first reset member 6 is arranged between the impact block 5 and the mounting frame 3. An impact mechanism is arranged in the mounting shell 2 at a position corresponding to the rear of the percussion cutter bar 4, and the impact mechanism is used to impact the impact block 5 outward. The impact mechanism includes an electromagnet assembly 7 arranged in the mounting shell 2. A fixed frame 8 is arranged in the mounting shell 2 at a position corresponding to the rear of the electromagnet assembly 7. A striker rod 9 is slidably connected to the fixed frame 8 and the electromagnet assembly 7. A mating block 10 is arranged on the striker rod 9 at a position behind the fixed frame 8. A second reset member 11 is arranged between the mating block 10 and the fixed frame 8. A permanent magnet 12 cooperating with the electromagnet is arranged on the striker rod 9. A guide rod 13 is arranged between the electromagnet assembly 7 and the fixed frame 8, and the permanent magnet 12 is slidably connected to the guide rod 13. A plurality of connecting frames 14 are circumferentially distributed on the cutter head 1. Mounting grooves are formed in the connecting frames 14, and the mounting shells 2 are detachably connected to the mounting grooves. The connecting frames 14 are detachably connected to the mounting shells 2 by bolts. During use, the impact mechanism can repeatedly impact the impact block 5, thereby driving the percussion cutter bar 4 to impact outward to break the rock. When the percussion cutter bar 4 is ejected by the impact mechanism and not reset, the percussion cutter bar 4 can slide on the rock from the damage point driven by the rotation of the cutter head 1, further damaging the integrity of the rock. Then, after the impact mechanism is reset, the percussion cutter bar 4 can be driven by the first reset member 6 to reset inward. With the structure of this application, the impact mechanism can repeatedly impact the impact block 5, thereby driving the percussion cutter bar 4 to slide on the mounting frame 3 and continuously impact the overall surface of the rock point by point, realizing the overall damage of the rock from point to surface. At the same time, when the percussion cutter bar 4 is ejected by the impact mechanism and not reset, it can slide on the rock from the damage point driven by the rotation of the cutter head 1, further damaging the integrity of the rock. And the cooperation with the cutters on the cutter head 1 ensures the efficiency of rock breaking, reduces the difficulty of the cutters breaking the rock, thereby realizing the reduction of the speed of cutter loss. In addition, the percussion cutter bar 4 and the impact mechanism adopt a split design, which can reduce the influence on the impact mechanism when the percussion cutter bar 4 is driven by the cutter head 1 to slide on the rock, and can be replaced separately after the percussion cutter bar 4 is damaged, reducing costs.

[0018] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hard rock tunnel boring machine, including a cutterhead, characterized in that: A plurality of mounting shells are distributed on the cutter disc, and a mounting frame is detachably connected to the end of the mounting shell, and an impact knife rod is slidably connected to the mounting frame, and an impact block is provided at the inner end of the impact knife rod, and a first reset member is provided between the impact block and the mounting frame; an impact mechanism is provided in the mounting shell corresponding to the rear position of the impact knife rod, and the impact mechanism is used to impact the impact block outward.

2. The hard rock tunnel boring machine according to claim 1, characterized in that: The impact mechanism includes an electromagnet assembly arranged in the mounting shell, a fixing frame is arranged in the mounting shell corresponding to the rear position of the electromagnet assembly, a striker is slidably connected between the fixing frame and the electromagnet assembly, a matching block is arranged on the striker located at the rear position of the fixing frame, a second reset member is arranged between the matching block and the fixing frame, and a permanent magnet matching the electromagnet is arranged on the striker.

3. The hard rock tunnel boring machine according to claim 2, characterized in that: A guide rod is arranged between the electromagnet assembly and the fixing frame, and the permanent magnet is slidably connected to the guide rod.

4. The hard rock tunnel boring machine according to claim 1, characterized in that: A plurality of connecting frames are circumferentially distributed on the cutter disc, and mounting grooves are formed on the connecting frames. The mounting shells are detachably connected to the mounting grooves.

5. The hard rock tunnel boring machine according to claim 4, characterized in that: The connecting frame is detachably connected to the mounting shell via bolts.

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