TBM shield

Abstract

The utility model discloses a TBM shield which comprises a shield body, a plurality of guide wheels are evenly distributed in the shield body, the guide wheels are connected with a bogie in a sliding mode, the bogie is connected with an escape cutter assembly, the escape cutter assembly is used for cutting surrounding rock around the shield body, the escape cutter assembly comprises a fixing plate, a cavity is formed in the fixing plate, and the fixing plate is fixedly installed on the bogie. An oil cylinder is arranged in a cavity in the fixing plate, and the telescopic end of the oil cylinder is connected with the tool bit and used for adjusting the position of the tool bit. According to the utility model, the tool bit is ejected out of the shield body through the oil cylinder, and the steering frame rotates to drive the tool bit to rotate, so that surrounding rock walls are cut, broken stones or deformed rock walls clamping the shield body are crushed, TBM escape is realized, and the escape tool assembly can go deep into a tunnel along with the tunneling work of the TBM. And when the machine is stuck, de-trapping treatment can be immediately carried out, so that the treatment time is saved, and the potential safety hazard occurring in the equipment allocation and transportation process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction equipment technology, specifically to a TBM shield. Background Technology

[0002] In China, full-face tunnel boring machines used in rock formations are simply called TBMs (hard rock TBMs), while those used in soft soil formations are called shield tunneling machines. When a TBM passes through unfavorable rock formations, due to complex geological conditions and unstable surrounding rock leading to excessive deformation or large-volume collapses, the TBM is prone to getting stuck. Because the TBM shield is relatively long, dealing with a stuck machine is time-consuming and labor-intensive. If the handling method is improper or the stuck machine is stuck for too long, the shield shell will deform, ultimately rendering the shield machine unusable and causing large-scale collapses. If a stuck TBM is not dealt with and freed in time, it can easily lead to a more serious accident.

[0003] Currently, the main methods for dealing with TBM jamming include pilot tunnel excavation and chemical grouting, both of which involve using external equipment to treat the collapsed area. The process requires transporting equipment from outside to the tunnel excavation site, which not only consumes a significant amount of time and makes it difficult to quickly resolve the TBM jamming, but also cannot guarantee that the tunnel wall will not collapse again within the treatment time, leading to even greater losses. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned above in the background technology and to propose a TBM shield.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A TBM shield includes: a shield body, with multiple guide wheels evenly distributed within the shield body, the guide wheels being slidably connected to a bogie, the bogie being connected to an escape cutter assembly, the escape cutter assembly being used to cut the surrounding rock around the shield body, the escape cutter assembly including a fixing plate with an internal cavity, the fixing plate being fixedly installed on the bogie, a hydraulic cylinder being disposed in the cavity within the fixing plate, the telescopic end of the hydraulic cylinder being connected to a cutter head for adjusting the position of the cutter head.

[0007] As a further embodiment of this utility model: the escape knife assembly also includes an oil nozzle, which is embedded in the knife head, and the nozzle nozzle's spray port faces the shield body.

[0008] As a further embodiment of this utility model: the fuel injector is connected to the outside of the shield body through a pipeline, and at the end of the pipeline, it is connected to an external fuel supply pump station through an adapter and valve group.

[0009] As a further embodiment of this utility model: a drive motor is fixedly installed on the shield body, and a gear is fixedly installed on the output end of the drive motor.

[0010] As a further embodiment of this utility model: the inner ring of the bogie is fixedly mounted with a gear ring by bolts, and the gear ring meshes with the gear for transmission.

[0011] As a further embodiment of this utility model: multiple sets of the escape blade assembly are provided, and the multiple sets of the escape blade assembly are evenly distributed on the front end face of the shield body.

[0012] As a further embodiment of this utility model: the shield body is connected to the cutter head assembly, the cutter head assembly includes a cutter head, and the cutter head is connected to the main drive housing by bolts.

[0013] As a further embodiment of this utility model: the main drive housing is connected to a motor.

[0014] As a further embodiment of this utility model: the main drive housing is fixedly installed on the shield body.

[0015] As a further embodiment of this utility model: the cutter head assembly further includes a cutter head side guard plate, which is fixedly connected to the fixing plate.

[0016] The beneficial effects of this utility model are:

[0017] In this invention, the cutter head is pushed out of the shield body by a hydraulic cylinder, and the bogie rotates to drive the cutter head to rotate, thereby cutting the surrounding rock wall and breaking up the rubble or deformed rock wall that is stuck in the shield body, thus enabling the TBM to get out of trouble. The freeing cutter assembly can follow the TBM's tunneling work into the tunnel. When a jamming situation occurs, it can immediately perform freeing treatment, saving processing time and reducing safety hazards during equipment transportation. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a front view of the TBM shield of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the TBM shield of this utility model;

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure of the escape blade assembly;

[0022] Figure 4 yes Figure 2 A schematic diagram of the assembly of the bogie and guide wheels inside the central shield body.

[0023] In the picture:

[0024] 1. Shield body; 2. Bogie; 3. Drive motor; 4. Guide wheel; 5. Escape blade assembly; 501. Blade head; 502. Fuel injector; 503. Hydraulic cylinder; 504. Fixing plate; 6. Blade disc assembly; 601. Side guard plate; 602. Main drive housing. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model relates to a TBM shield, a key structural component of a TBM, primarily used to protect the cutterhead and other important parts, ensuring stable operation of the TBM during underground tunneling. The shield not only provides support and protection but also participates in the propulsion process, helping the TBM to tunnel smoothly under various geological conditions.

[0027] Please see Figures 1-2 As shown, the TBM shield includes: a shield body 1, with multiple guide wheels 4 evenly distributed inside the shield body 1, and the guide wheels 4 are evenly distributed and fixed to the front end of the shield body 1.

[0028] The guide wheel 4 is slidably connected to the bogie 2, and the bogie 2 is connected to the escape cutter assembly 5, which is used to cut the surrounding rock around the shield body 1. Multiple sets of escape cutter assemblies 5 are provided, and the multiple sets of escape cutter assemblies 5 are evenly distributed on the front end face of the shield body 1.

[0029] For details, please refer to Figures 2-3 As shown, the escape tool assembly 5 includes a fixing plate 504 with an internal cavity. The fixing plate 504 is fixedly mounted on the bogie 2. A hydraulic cylinder 503 is disposed in the cavity of the fixing plate 504. The telescopic end of the hydraulic cylinder 503 is connected to the cutter head 501 for adjusting the position of the cutter head 501. The hydraulic cylinder 503 is connected to the base and can rotate on the base. The cutter head 501 is made of alloy material, including but not limited to cemented carbide (WC-Co alloy) and ceramic alloy.

[0030] Furthermore, the escape tool assembly 5 also includes an oil injector 502, which is embedded in the cutter head 501, with the nozzle of the oil injector 502 facing the shield body 1. The oil injector 502 is connected to the outside of the shield body 1 via a pipeline, and at the end of the pipeline, it is connected to an external oil supply pump station via an adapter and valve assembly. The oil injector 502 can spray oil around the outside of the shield body 1 when the cutter head 501 extends to cut the rock wall, lubricating the rock wall and the shield body 1, reducing friction at stuck locations, and making it easier for the TBM shield to escape.

[0031] Please see Figure 2 , Figure 4 As shown, a drive motor 3 is fixedly mounted on the shield body 1, and a gear is fixedly mounted on the output end of the drive motor 3. A gear ring is fixedly mounted on the inner ring of the bogie 2 by bolts, and the gear ring meshes with the gear for transmission. The drive motor 3 drives the gear to rotate, and the gear drives the bogie 2 to rotate.

[0032] The shield body 1 is also connected to the cutterhead assembly 6, which includes a cutterhead. The cutterhead is bolted to the main drive housing 602, which is fixedly installed on the shield body 1. A motor is fixedly installed in the main drive housing 602, and the motor output is connected to the blades in the cutterhead, allowing the motor to drive the blades to rotate. The cutterhead assembly 6 also includes a cutterhead side guard plate 601, which is fixedly connected to the fixing plate 504.

[0033] In this embodiment, during use, the cutterhead rotates forward to excavate the tunnel. When the TBM cutterhead jams and cannot operate, and the shield body 1 is stuck on the tunnel edge rock wall and cannot retreat, the position of the cutter head 501 is adjusted by the hydraulic cylinder 504 so that the cutter head 501 is pressed against the tunnel rock wall. Then, the drive motor 3 is started to drive the bogie 2 to rotate, which in turn drives the escape cutter assembly 5 to rotate. When the cutter head 501 rotates, it cuts the surrounding rock, widening the rock wall around the shield body 1, so that there is enough space inside the tunnel to facilitate the shield body 1 to retreat and escape. The oil nozzle 502 can spray oil around the outside of the shield body 1 when the cutter head 501 extends to cut the rock wall, lubricating the rock wall and the shield body 1, reducing friction at the jammed position, and making it easier for the TBM shield to escape. After the escape is completed, the hydraulic cylinder 503 is adjusted to retract the cutter head 501 for the next use.

[0034] Understandably, the escape tool assembly 5 can follow the TBM's excavation work deep into the tunnel. When a jam occurs, it can immediately perform escape processing, saving processing time and reducing safety hazards during equipment transportation, effectively reducing losses.

[0035] In addition, if the geological conditions are suitable, the hydraulic cylinder 503 can drive the cutter head 501 to extend to the outer periphery of the shield body 1, with an extension distance exceeding the over-digging size of the edge roller cutter in the cutter head assembly 6, thereby achieving over-digging with a larger diameter.

[0036] The working principle of this utility model is as follows: The cutterhead rotates forward to excavate the tunnel. When the TBM cutterhead gets stuck and cannot operate, and the shield body 1 is stuck on the rock wall at the edge of the tunnel and cannot retreat, the escape cutter assembly 5 is set up. With the cooperation of the bogie 2, the drive motor 3 and the guide wheel 4, the escape cutter assembly 5 can rotate. At the same time, the hydraulic cylinder 503 in the escape cutter assembly 5 can push the cutter head 501 outward. Then, driven by the drive motor 3, it rotates and cuts the surrounding rock wall, breaking the debris or deformed rock wall that is stuck on the shield body 1, thus freeing the TBM. The oil nozzle 502 can spray oil around the outside of the shield body 1 when the cutter head 501 extends out to cut the rock wall, lubricating the rock wall and the shield body 1, reducing friction at the stuck position, and making it easier for the TBM shield to get out of trouble.

[0037] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A TBM shield, characterized in that, include: The shield body (1) has multiple guide wheels (4) evenly distributed inside it; The guide wheel (4) is slidably connected to the bogie (2), the bogie (2) is connected to the escape knife assembly (5), and the escape knife assembly (5) is used to cut the surrounding rock around the shield body (1); The escape tool assembly (5) includes a fixing plate (504) with an internal cavity. The fixing plate (504) is fixedly installed on the bogie (2). A hydraulic cylinder (503) is installed in the cavity of the fixing plate (504). The telescopic end of the hydraulic cylinder (503) is connected to the cutter head (501) for adjusting the position of the cutter head (501).

2. A TBM shield according to claim 1, characterized in that, The escape knife assembly (5) also includes an oil nozzle (502), which is embedded in the knife head (501) and the nozzle (502) faces the shield body (1).

3. A TBM shield according to claim 2, characterized in that, The fuel injector (502) is connected to the outside of the shield body (1) through a pipeline, and at the end of the pipeline, it is connected to an external fuel supply pump station through an adapter and valve group.

4. A TBM shield according to claim 1, characterized in that, The shield body (1) is fixedly equipped with a drive motor (3), and a gear is fixedly installed at the output end of the drive motor (3).

5. A TBM shield according to claim 4, characterized in that, The inner ring of the bogie (2) is fixedly mounted with a gear ring by bolts, and the gear ring meshes with the gear for transmission.

6. A TBM shield according to claim 1, characterized in that, Multiple sets of the escape knife assembly (5) are provided, and the multiple sets of the escape knife assembly (5) are evenly distributed on the front end face of the shield body (1).

7. A TBM shield according to claim 1, characterized in that, The shield body (1) is connected to the cutter head assembly (6), the cutter head assembly (6) includes a cutter head, and the cutter head is connected to the main drive housing (602) by bolts.

8. A TBM shield according to claim 7, characterized in that, The main drive housing (602) is connected to the motor.

9. A TBM shield according to claim 7, characterized in that, The main drive housing (602) is fixedly installed on the shield body (1).

10. A TBM shield according to claim 7, characterized in that, The cutter head assembly (6) also includes a cutter head side guard plate (601), which is fixedly connected to the fixing plate (504).

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