Composite formation TBM multi-mode rock breaking toolholder system

Abstract

The present invention provides a multi-mode rock-breaking tool holder system for a composite formation TBM. The rock-breaking tool holder includes a tool holder body, which is installed inside a cutterhead through a first placement slot. The rear surface of the cutterhead is provided with a motor compartment, and a drive motor is provided inside the motor compartment. The output end of the drive motor is fixedly connected to a threaded rod, and the outer surface of the threaded rod is threadedly connected to an extrusion plate, and the front end of the extrusion plate is fixedly connected to the extrusion rod. The front surface of the cutterhead is provided with a second placement slot, and a connector is installed inside the second placement slot. The multi-mode rock-breaking tool holder system for a composite formation TBM has a detachable split tool holder design, which can quickly disassemble the tool holder body support part. First, a new roller cutter module and the tool holder body support part are assembled, and then the installation is completed by high-strength springs and high-strength pins. This greatly shortens the downtime caused by tool replacement and improves the operating efficiency of the TBM.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction equipment, and in particular to a TBM multi-mode rock breaking tool holder system for composite strata. Background Art

[0002] In tunnel construction, traditional rock breaking toolholder systems face many challenges, especially when faced with complex formations. Composite formations contain rock layers with different geological characteristics, such as soft rock, hard rock, and interlayers of alternating soft and hard layers. This requires rock breaking equipment to be highly flexible and adaptable.

[0003] Early TBM toolholder systems were mostly fixed structures with a single tool combination, making them difficult to adjust according to changes in the strata. In soft rock formations, the tools equipped with fixed-structure toolholders could not fully utilize the easily breakable nature of soft rock, resulting in low rock breaking efficiency and prone to excessive tool wear. In hard rock formations, the strength and wear resistance of the tools were insufficient, and tool damage occurred frequently, seriously affecting the construction progress. At the same time, when encountering interlayer formations, the fixed toolholder was unable to effectively cope with the alternating changes in rock strata of different hardness. During construction, it was often necessary to shut down the machine for complex modification or replacement of the toolholder, which was not only time-consuming and labor-intensive, but also significantly increased construction costs.

[0004] With the continuous expansion of the scale of tunnel construction projects, the requirements for TBM construction efficiency and adaptability are becoming more urgent. To solve the above problems, the development of a multi-mode rock-breaking toolholder system that can quickly adapt to different stratum conditions has become an important issue in the industry. Against this background, the composite stratum TBM multi-mode rock-breaking toolholder system came into being, dedicated to breaking the limitations of traditional toolholders and improving the construction efficiency of TBMs in composite strata. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a multi-mode rock breaking tool holder system for composite formation TBM, which solves the problems of poor formation adaptability, low rock breaking efficiency and difficulty in tool replacement.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-mode rock-breaking tool holder system for a composite formation TBM, comprising: a tool holder body, the tool holder body is installed inside the cutter disc through a first placement slot, the rear surface of the cutter disc is provided with a motor compartment, a drive motor is provided inside the motor compartment, the output end of the drive motor is fixedly connected to a threaded rod, the outer surface of the threaded rod is threadedly connected to an extrusion plate, the front end of the extrusion plate is fixedly connected to the extrusion rod, the front surface of the cutter disc is provided with a second placement slot, a connecting piece is installed inside the second placement slot, and the rear surface of the connecting piece is fixedly connected to the tool holder body.

[0007] Preferably, a squeeze chamber is provided on the rear surface of the cutter disc, and an inner wall of the squeeze chamber is slidably connected to the squeeze plate.

[0008] Preferably, a pressing hole is provided on the rear surface of the cutter disc, and a pressing block is slidably connected to the inner wall of the pressing hole.

[0009] Preferably, a second sliding groove is provided inside the connecting member, and a high-strength spring is fixedly connected to the bottom inner wall of the second sliding groove.

[0010] Preferably, a high-strength latch is provided inside the high-strength spring, a rear end of the high-strength latch is fixedly connected to a limiting ring, and an outer surface of the limiting ring is slidably connected to the tool holder body through a first sliding groove.

[0011] Preferably, the outer surface of the high-strength pin is slidably connected to the tool holder body through a limiting hole, and the front surface of the high-strength pin is in contact with the extrusion rod.

[0012] Preferably, a third placement groove is provided on the side inner wall of the tool holder body, and a limiting sleeve is fixedly connected to the inner wall of the third placement groove.

[0013] Preferably, the inner wall of the limiting sleeve is rotatably connected to a rotating shaft, and the outer surface of the rotating shaft is rotatably connected to a hob.

[0014] The present invention provides a multi-mode rock breaking toolholder system for TBMs in composite formations. It has the following beneficial effects:

[0015] 1. High adaptability to formations. The detachable split cutterhead design enables flexible replacement of cutter modules. For soft rock, a combination of small-diameter, thin-bladed cutters with a large number of blades achieves efficient crushing at high speeds and dense cutting points. For hard rock, large-diameter, thick-bladed, high-strength cutters are used, with strong extrusion pressure and wear resistance. For interbedded formations, the cutter arrangement can be adjusted or special cutters, such as sawtooth cutters, can be selected to adapt to alternating rock formations, significantly improving the rock breaking efficiency and effectiveness of the TBM in various composite formations.

[0016] 2. Quick replacement and efficient operation. When the tool holder body needs to be replaced to adapt to different formation tool combinations, the drive motor drives the threaded rod, so that the extrusion plate pushes the extrusion rod and ejects the high-strength pin. The operator uses the pressing block to press the connector through the pressing hole to quickly disassemble the tool holder body support part and then quickly replace the hob cutter module. The installation process is clear. First, assemble the new hob cutter module and the tool holder body support part, and then complete the installation with high-strength springs and high-strength pins. The whole process is easy to operate, which greatly shortens the downtime caused by tool replacement and improves the operating efficiency of the TBM. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2It is a schematic diagram of the main structure of the tool holder of the present invention.

[0019] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0020] Figure 4 It is a rear view of the present invention.

[0021] Figure 5 It is a structural diagram of the extrusion mechanism of the present invention.

[0022] Figure 6 It is a schematic diagram of the hob structure of the present invention.

[0023] Among them, 1. Tool holder body; 2. First placement slot; 3. Second placement slot; 4. Hob; 5. Limiting hole; 6. Connector; 7. First slide slot; 8. Limiting ring; 9. High-strength spring; 10. High-strength latch; 11. Cutting disc; 12. Drive motor; 13. Threaded rod; 14. Motor compartment; 15. Extrusion plate; 16. Extrusion rod; 17. Pressing hole; 18. Pressing block; 19. Extrusion compartment; 20. Second slide slot; 21. Third placement slot; 22. Limiting sleeve; 23. Rotating shaft. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1-6 As shown, an embodiment of the present invention provides a multi-mode rock breaking tool holder system for a composite formation TBM, including a tool holder body 1, which is installed inside a cutter head 11 through a first placement groove 2, a motor compartment 14 is provided on the rear surface of the cutter head 11, a drive motor 12 is provided inside the motor compartment 14, an output end of the drive motor 12 is fixedly connected to a threaded rod 13, an outer surface of the threaded rod 13 is threadedly connected to an extrusion plate 15, an extrusion compartment 19 is provided on the rear surface of the cutter head 11, an inner wall of the extrusion compartment 19 is slidably connected to the extrusion plate 15, the extrusion compartment 19 plans a precise sliding path for the extrusion plate 15, and an extrusion rod 16 is fixedly connected to the front end of the extrusion plate 15, a second placement groove 3 is provided on the front surface of the cutter head 11, a connecting member 6 is installed inside the second placement groove 3, and a rear surface of the connecting member 6 is fixedly connected to the tool holder body 1.

[0026] The rear surface of the cutter disc 11 is provided with a pressing hole 17, and the inner wall of the pressing hole 17 is slidably connected with a pressing block 18. The pressing hole 17 and the pressing block 18 provide a manual operation path for the operator. When the tool holder body 1 is replaced, the operator can use the pressing block 18 to assist in squeezing out the tool holder body 1, thereby improving the flexibility and controllability of the replacement operation. A second slide groove 20 is provided inside the connecting piece 6, and a high-strength spring 9 is fixedly connected to the bottom inner wall of the second slide groove 20. A high-strength latch 10 is provided inside the high-strength spring 9, and the extrusion plate 15 moves stably thereby, prompting the extrusion rod 16 to accurately push out the high-strength latch 10, effectively ensuring that the replacement process of the tool holder body 1 is stable and smooth, ensuring the reliability of the replacement process. The second slide groove 20 reserves space for the high-strength spring 9 and the high-strength latch 10 and plans a track. The high-strength spring 9 is crucial in the installation and fixing of the tool holder body 1 to ensure that the relevant functions can be accurately realized, and the high-strength latch 10 undertakes the task of fixing and unlocking the tool holder body 1.

[0027] The rear end of the high-strength latch 10 is fixedly connected to the limiting ring 8, and the outer surface of the limiting ring 8 is slidably connected to the tool holder body 1 through the first slide groove 7. The limiting ring 8 works together with the first slide groove 7 to limit the movement range of the high-strength latch 10, strengthen the reliability of the fixing and unlocking mechanism, and make it run stably. The outer surface of the high-strength latch 10 is slidably connected to the tool holder body 1 through the limiting hole 5. The front surface of the high-strength latch 10 contacts the extrusion rod 16, and the limiting hole 5 guides the high-strength latch 10 to move accurately, thereby realizing the unlocking and locking of the tool holder body 1. The high-strength latch 10 and the extrusion rod 16 contact each other, transmit power, complete the preparation work before unlocking, and the tool holder A third placement groove 21 is provided on the inner wall of the side of the main body 1, and a limiting sleeve 22 is fixedly connected to the inner wall of the third placement groove 21. The third placement groove 21 and the limiting sleeve 22 are arranged to support the installation and rotation of the roller cutter 4, which can not only ensure the smooth rotation of the roller cutter 4, but also facilitate its installation and disassembly, and is beneficial to the daily maintenance work of the roller cutter 4. The inner wall of the limiting sleeve 22 is rotatably connected to the rotating shaft 23, and the outer surface of the rotating shaft 23 is rotatably connected to the roller cutter 4, constructing a rotating structure of the roller cutter 4. The limiting sleeve 22, the rotating shaft 23 and the roller cutter 4 are rotatably connected to each other, allowing the roller cutter 4 to operate efficiently when breaking rocks, thereby improving the rock breaking performance and extending the service life of the roller cutter 4.

[0028] Working principle: The tool holder adopts a detachable split design, and the cutter module 4 is combined with the support part of the tool holder body 1 through a specific connection structure. During TBM operation, the cutter head 11 rotates at high speed, driving the support part of the tool holder body 1 installed in the first placement slot 2 inside it to rotate synchronously, and then driving the cutter module 4 connected to it to rotate. The cutter 4 contacts the rock and relies on its own rotational force to cut and squeeze the rock to achieve rock breaking. In soft rock formations, a combination of smaller diameter, thinner blades and more cutters 4 can be selected. The higher rotation speed and dense cutting points can be used to efficiently crush soft rock. In hard rock formations, large diameter, thick blade and high strength cutters 4 are replaced. With strong extrusion force and wear resistance, hard rock can be coped with. When encountering interlayer formations, the arrangement of the cutter combination 4 can be flexibly adjusted according to the characteristics of the interlayer or specially designed cutters 4 can be selected, such as those with serrated structures to adapt to the alternation of rock formations of different hardness. The support part of the tool holder body 1 provides stable support and transmission for the cutter module 4, ensuring that the cutter 4 can work efficiently and stably.

[0029] When the tool holder body 1 needs to be replaced to adapt to the cutting tool combination of different formations, the drive motor 12 installed in the motor compartment 14 on the rear surface of the cutter head 11 is first started. The output end of the drive motor 12 drives the threaded rod 13 to rotate. Since the threaded rod 13 is threadedly connected to the extrusion plate 15, and the extrusion plate 15 is slidable in the inner wall of the extrusion compartment 19, the rotation of the threaded rod 13 causes the extrusion plate 15 to move forward along the inner wall of the extrusion compartment 19, and the extrusion rod 16 fixedly connected to the front end of the extrusion plate 15 also moves forward, ejecting the high-strength latch 10 from the limit hole 5. At this time, the high-strength latch 10 no longer The supporting part of the tool holder body 1 plays a fixing role. Then, the operator uses the pressing block 18 to press the connecting piece 6 through the pressing hole 17 on the rear surface of the cutter disc 11. Since the rear surface of the connecting piece 6 is fixedly connected to the supporting part of the tool holder body 1, pressing the connecting piece 6 will cause the supporting part of the tool holder body 1 to be squeezed out from the first placement groove 2 and the second placement groove 3, thereby completing the disassembly of the supporting part of the tool holder body 1. Afterwards, the original hob 4 module is removed from the connecting structure on the supporting part of the tool holder body 1, and ready to be replaced with a new cutting tool combination suitable for different formations.

[0030] When installing a new tool holder body 1, first install the cutting tool combination adapted to the specific formation, that is, the new roller cutter 4 module, on the supporting part of the tool holder body 1, ensuring that the two are firmly connected and meet the rock breaking requirements. Then, the high-strength pin 10 is squeezed inward by external force against the high-strength spring 9, so that the high-strength pin 10 is retracted into the inside of the connecting piece 6. Subsequently, the supporting part of the tool holder body 1 with the assembled roller cutter 4 module is aligned with the first placement groove 2 on the cutter disc 11, and the connecting piece 6 is aligned with the second placement groove 3, and the supporting part of the tool holder body 1 and the connecting piece 6 are pushed forward. When the supporting part of the tool holder body 1 and the connecting piece 6 move to the appropriate position, the high-strength spring 9 will release the elastic potential energy and push the high-strength pin 10 back into the limit hole 5, thereby achieving a firm installation of the tool holder body 1. After the installation is completed, the tool holder body 1 and the roller cutter 4 can work normally again in the TBM rock breaking operation. With the flexibly replaceable cutting tool combination under the split design, it can adapt to the complex and changeable rock breaking requirements of composite formations.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The multi-mode rock breaking toolholder system for TBM in composite formations is characterized by: include: A tool holder body (1), wherein the tool holder body (1) is installed inside a tool disc (11) through a first placement groove (2); a motor compartment (14) is provided on the rear surface of the tool disc (11); a drive motor (12) is provided inside the motor compartment (14); an output end of the drive motor (12) is fixedly connected to a threaded rod (13); an outer surface of the threaded rod (13) is threadedly connected to an extrusion plate (15); a front end of the extrusion plate (15) is fixedly connected to an extrusion rod (16); a second placement groove (3) is provided on the front surface of the tool disc (11); a connecting member (6) is installed inside the second placement groove (3); and a rear surface of the connecting member (6) is fixedly connected to the tool holder body (1); The rear surface of the cutter disc (11) is provided with an extrusion bin (19), the inner wall of the extrusion bin (19) is slidably connected to the extrusion plate (15), the rear surface of the cutter disc (11) is provided with a pressing hole (17), the inner wall of the pressing hole (17) is slidably connected to the pressing block (18), the interior of the connecting member (6) is provided with a second slide groove (20), the bottom inner wall of the second slide groove (20) is fixedly connected to a high-strength spring (9), the interior of the high-strength spring (9) is provided with a high-strength latch (10), the rear end of the high-strength latch (10) is fixedly connected to a limiting ring (8), the outer surface of the limiting ring (8) is slidably connected to the tool holder body (1) through the first slide groove (7), the outer surface of the high-strength latch (10) is slidably connected to the tool holder body (1) through the limiting hole (5), and the front surface of the high-strength latch (10) is in contact with the extrusion rod (16).

2. The multi-mode rock breaking toolholder system for composite formation TBM according to claim 1 is characterized by: A third placement groove (21) is provided on the side inner wall of the tool holder body (1), and a limiting sleeve (22) is fixedly connected to the inner wall of the third placement groove (21).

3. The multi-mode rock breaking toolholder system for a composite formation TBM according to claim 2 is characterized by: The inner wall of the limiting sleeve (22) is rotatably connected to a rotating shaft (23), and the outer surface of the rotating shaft (23) is rotatably connected to a hob (4).

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