A rear support platform for a shaft tunneling machine with walking and stability functions

Abstract

The present invention discloses a rear supporting platform of a shaft tunneling machine with walking and stabilizing functions, which relates to the technical field of shaft tunneling machines. It includes at least one rear supporting platform, which is arranged above the main machine platform and fixedly sleeved outside the central support of the tunneling machine. A number of retractable first walking mechanisms are provided on the upper surface of each rear supporting platform, and first rollers are arranged at the ends of the first walking mechanisms. When the shaft tunneling machine walks, the first walking mechanisms extend, so that the first rollers are abutted against the surface of the tunnel wall and roll; a number of retractable second walking mechanisms are provided under each rear supporting platform, and second rollers are arranged at the ends of the second walking mechanisms. When the shaft tunneling machine walks, the second walking mechanisms extend, so that the second rollers are abutted against the surface of the tunnel wall and roll. The rear supporting platform disclosed by the present invention has good stability, and the walking mechanisms on the rear supporting platform can cross obstacles on the tunnel wall, ensuring the continuity and high efficiency of shaft construction.

Description

Technical Field

[0001] The invention belongs to the technical field of shaft boring machines, and more specifically, relates to a rear supporting platform of a shaft boring machine with walking and stabilizing functions. Background Art

[0002] Vertical shafts are commonly found in underground projects such as subways, coal mines, water conservancy projects, roads, and railways. As professional equipment for vertical shaft construction, vertical shaft boring machines are increasingly showing their importance and necessity in vertical shaft projects. During vertical shaft construction, the main machine of the vertical shaft boring machine meets the requirements of forward movement (changing steps) and stability through the support device. During the vertical movement, the rear supporting equipment moves downward with the main machine.

[0003] The shaft boring machine is different from the traditional tunnel boring machine. The rear accessories of the traditional tunnel boring machine are located on the ground track to meet its walking requirements. During the construction process, the rear accessories of the shaft boring machine cannot be close to the tunnel wall and face stability problems such as tilting and shaking. Shaft construction is different from ordinary tunnel construction. The laying of shaft construction tracks is extremely difficult, and the tracks cannot provide support for the shaft boring machine to meet the walking requirements. During the construction of the shaft boring machine, steel arches and shotcrete will be erected on the tunnel wall in the poor geological sections, and temporary equipment will sometimes be arranged on the tunnel wall. How the rear accessories can cross obstacles such as steel arches, concrete, and temporary equipment while ensuring walking and stability needs to be solved urgently. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a rear supporting platform for a shaft boring machine with walking and stabilizing functions, which has good stability and ensures the safety of equipment and personnel on the platform. The walking mechanism on the rear supporting platform can cross obstacles on the tunnel wall to ensure the continuity and efficiency of the shaft construction.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A rear supporting platform of a shaft boring machine with walking and stabilizing functions comprises at least one rear supporting platform, which is arranged above a main platform and fixedly sleeved on the outside of a central support of the boring machine; a plurality of retractable first walking mechanisms are evenly arranged along the circumference on the upper surface of each of the rear supporting platforms, and a first roller is arranged at the end of each of the first walking mechanisms. When the shaft boring machine walks, the first walking mechanism is extended so that the first roller presses against the surface of the tunnel wall and rolls along the surface of the tunnel wall; a plurality of retractable second walking mechanisms are evenly arranged along the circumference on the lower surface of each of the rear supporting platforms, and a second roller is arranged at the end of each of the second walking mechanisms. When the shaft boring machine walks, the second walking mechanism is extended so that the second roller presses against the surface of the tunnel wall and rolls along the surface of the tunnel wall.

[0007] Preferably, there are at least two first traveling mechanisms and at least two second traveling mechanisms, and the first traveling mechanisms and the second traveling mechanisms are distributed at intervals along the circumference.

[0008] Preferably, the first traveling mechanism includes at least one first hydraulic cylinder. One end of each first hydraulic cylinder is fixedly connected to the rear support platform, and the other end is rotatably connected to at least one first roller; the second traveling mechanism includes at least one second hydraulic cylinder. One end of each second hydraulic cylinder is fixedly connected to the rear support platform, and the other end is rotatably connected to at least one second roller.

[0009] Preferably, the distance that the first hydraulic cylinder and the second hydraulic cylinder extend out of the excavation contour of the tunnel wall is less than 20 cm.

[0010] Preferably, the net distance between the first traveling mechanism and the second traveling mechanism is greater than the thickness of the steel arch.

[0011] Preferably, limit switches are provided on both the first traveling mechanism and the second traveling mechanism.

[0012] Preferably, there are two rear support platforms, and the two rear support platforms are fixedly sleeved outside the central support in sequence from top to bottom.

[0013] The beneficial effects of adopting the above technical solutions are as follows:

[0014] 1. When the first hydraulic cylinder and the second hydraulic cylinder are in the extended state, the first roller and the second roller are pushed against the tunnel wall, and the first roller and the second roller roll along the tunnel wall, meeting the basic functional requirements for the rear support to travel during shaft construction and meeting the construction needs.

[0015] 2. The first traveling mechanism and the second traveling mechanism can cross obstacles on the surface of the tunnel wall, such as steel arches, during the construction of the tunneling machine, ensuring the continuity and high efficiency of shaft construction. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a shaft tunneling machine.

[0017] In the figure: 1. Central support; 2. First roller; 3. First hydraulic cylinder; 4. Second roller; 5. Second hydraulic cylinder; 6. Rear support platform; 7. Main machine platform; 8. Bracket; 9. Cutter head. Detailed Embodiments

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0019] As Figure 1 shown, the rear support platform of the shaft tunneling machine with walking and stabilizing functions includes two rear support platforms 6, which are sequentially arranged above the main machine platform 7 from top to bottom and are fixedly sleeved outside the central support 1 of the tunneling machine. The central support 1 can be configured as a cylinder or a circular shaft. Below the main machine platform 7 are successively a support 8 and a cutter head 9.

[0020] On the upper surface of each rear support platform 6, three retractable first walking mechanisms are evenly arranged along the circumference. The first walking mechanism includes a first hydraulic cylinder 3. One end of each first hydraulic cylinder 3 is fixedly connected to the rear support platform 6, and the other end is rotatably connected to a first roller 2. When the shaft tunneling machine walks, the first hydraulic cylinder 3 extends, so that the first roller 2 abuts against the surface of the tunnel wall and rolls along the surface of the tunnel wall. On the lower surface of each rear support platform 6, three retractable second walking mechanisms are evenly arranged along the circumference. The second walking mechanism includes a second hydraulic cylinder 5. One end of each second hydraulic cylinder 5 is fixedly connected to the rear support platform 6, and the other end is rotatably connected to a second roller 4. When the shaft tunneling machine walks, the second hydraulic cylinder 5 extends, so that the second roller 4 abuts against the surface of the tunnel wall and rolls along the surface of the tunnel wall. The net distance between the first walking mechanism and the second walking mechanism is greater than the thickness of the steel arch. The first walking mechanisms and the second walking mechanisms connected to each rear support platform 6 are distributed at intervals, that is, a second walking mechanism is arranged between every two first walking mechanisms. Similarly, a first walking mechanism is arranged between every two second walking mechanisms.

[0021] According to the space and force requirements, two or more hydraulic cylinders of each walking mechanism can be arranged in parallel to synchronously extend and retract. Multiple hydraulic cylinders can be connected to the same roller, or one hydraulic cylinder can be connected to multiple rollers.

[0022] During the tunneling process of the tunneling machine, when encountering protrusions on the tunnel wall (such as steel arch, too thick concrete spraying, etc.), the second hydraulic cylinder 5 first contracts. After the second roller 4 crosses the protrusion, it extends to the tunnel wall again. Then the first hydraulic cylinder 3 contracts. After the first roller 2 crosses the protrusion, it extends to the tunnel wall again. The crossing of the rear support platform 6 over the tunnel wall obstacles is completed. When there is a protrusion at a certain place on the tunnel wall, the obstacle crossing can be realized by controlling one or more walking mechanisms that interfere with the protrusion.

[0023] Limit switches are provided on both the first traveling mechanism and the second traveling mechanism. When voids (or cave-ins) appear on the tunnel wall, the traveling mechanism triggers the limit switch, and the hydraulic cylinder can be manually controlled to extend, and the roller can be pushed against the tunnel wall within the stroke protection range of the hydraulic cylinder. Among them, each traveling mechanism can be independently controlled and locked. The distance that the first hydraulic cylinder 3 and the second hydraulic cylinder 5 extend out of the excavation contour of the tunnel wall should be less than 20 cm.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A rear support platform for a shaft tunneling machine with walking and stability functions, characterized in that It includes at least one rear support platform (6), which is arranged above the main machine platform (7) and fixedly sleeved outside the central support (1) of the tunneling machine. A number of retractable first traveling mechanisms are evenly arranged along the circumference on the upper surface of each rear support platform (6). At the end of each first traveling mechanism, a first roller (2) is provided. When the shaft tunneling machine travels, the first traveling mechanism extends, so that the first roller (2) abuts against the surface of the tunnel wall and rolls along the surface of the tunnel wall; A number of retractable second traveling mechanisms are evenly arranged along the circumference on the lower surface of each rear support platform (6). At the end of each second traveling mechanism, a second roller (4) is provided. When the shaft tunneling machine travels, the second traveling mechanism extends, so that the second roller (4) abuts against the surface of the tunnel wall and rolls along the surface of the tunnel wall; The number of the first traveling mechanisms is at least 3, the number of the second traveling mechanisms is at least 3, and the first traveling mechanisms and the second traveling mechanisms are distributed at intervals along the circumference; The first traveling mechanism includes at least one first hydraulic cylinder (3). One end of each first hydraulic cylinder (3) is fixedly connected to the rear support platform (6), and the other end is rotatably connected to at least one first roller (2); The second traveling mechanism includes at least one second hydraulic cylinder (5). One end of each second hydraulic cylinder (5) is fixedly connected to the rear support platform (6), and the other end is rotatably connected to at least one second roller (4); Limit switches are provided on both the first traveling mechanism and the second traveling mechanism; Each traveling mechanism can be controlled and locked individually.

2. A rear support platform of a shaft tunneling machine with walking and stability functions according to claim 1, characterized in that, The distance that the first hydraulic cylinder (3) and the second hydraulic cylinder (5) extend out of the excavation contour of the tunnel wall is less than 20 cm.

3. The trailing support platform of a shaft tunneling machine with walking and stabilizing functions according to claim 1, characterized in that, The net distance between the first traveling mechanism and the second traveling mechanism is greater than the thickness of the steel arch.

4. The trailing support platform of a shaft tunneling machine with walking and stability functions according to claim 1, characterized in that, The number of the rear support platforms (6) is two, and the two rear support platforms (6) are fixedly sleeved outside the central support (1) in sequence from top to bottom.

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