Stepping device and heading machine using same

Abstract

The utility model discloses a stepping device and a heading machine using the stepping device, which comprise a front lifting frame and a rear lifting frame which are mutually independent, and further comprise a front stepping bottom plate and a rear stepping bottom plate which are hinged through a driving device, the connecting oil cylinder has the left-right deflection freedom degree and the up-down deflection freedom degree relative to the front stepping bottom plate and / or the rear stepping bottom plate, and the rear stepping bottom plate is connected with a counter-force base. According to the technical scheme, the front lifting frame and the rear lifting frame are mutually independent and can independently ascend and descend, the front stepping bottom plate and the rear stepping bottom plate are mutually independent and can adjust the relative angle, and then the small-curve downhill turning and the small-curve horizontal turning are adapted.

Description

Technical Field

[0001] This utility model relates to the field of tunneling machine stepping technology, and in particular to a stepping device and a tunneling machine using the stepping device. Background Technology

[0002] In the field of tunnel engineering, tunnel boring machines (including TBMs, shield tunneling machines, and pipe jacking machines) have been widely used in pumped storage, water diversion, mining, and highway and railway tunnel construction projects due to their advantages of high efficiency, high quality, and safety. In pumped storage, mining, and highway and railway projects, some tunnel projects require stepping motion with small curve turning radii, which places higher demands on the turning adaptability of the stepping device.

[0003] Currently, commonly used stepping devices include conventional stepping mechanisms, arc-shaped guide platforms, and rail clamp stepping mechanisms. However, in practical engineering applications, it has been found that existing stepping devices have significant limitations when facing small curves, downhill turns, and horizontal turns. Because the tunnel space imposes stronger constraints on the stepping mechanism's motion in small curve turns, existing stepping devices struggle to accurately adapt to the curve trajectory, easily leading to stepping deviations and mechanism jamming. This results in reduced construction efficiency and even affects the safety and quality of tunnel construction, failing to meet the high-efficiency and stable stepping requirements for small curve turns and hindering the further promotion and application of tunnel boring machines in complex curved tunnel projects.

[0004] For example, the technical solutions disclosed in the applicant's prior patents: Chinese Utility Model Patent No. CN216305919U, with an authorization announcement date of April 15, 2022, discloses a TBM stepping device, which is a stepping device in the form of a rail clamp; Chinese Invention Patent No. CN107130972B, with an authorization announcement date of May 26, 2023, discloses a TBM stepping device adapted to turning, used to adjust the left and right yaw attitude of the TBM host to adjust the host direction, but because it includes a slide base and a slide plate on the slide base, as well as a lifting mechanism arranged on both sides of the front of the slide base and connected to the TBM shield, a rear support for supporting the weight of the rear of the TBM, and a tie rod connecting the slide base and the rear support, it is not suitable for small curve turning conditions. In particular, its rear support includes a saddle sliding support and a slide seat set at the bottom of the saddle sliding support, and a power mechanism for driving the saddle sliding support to move laterally is set on the slide seat, so it is also not suitable for small curve turning downhill conditions.

[0005] Therefore, developing a stepping device that can adapt to small curves, downhill turns, and horizontal turns has become a key issue that needs to be addressed to improve the adaptability and engineering efficiency of tunneling machines.

[0006] It should be noted that the above technical information is intended only to enhance the understanding of the overall background technology of this utility model, and should not be regarded as an admission or in any form implying that the above technical information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] To address the shortcomings in the aforementioned background technology, this utility model proposes a stepping device and a tunneling machine using the stepping device. The technical problem to be solved is: how to adapt to small curves downhill turns and small curves horizontal turns.

[0008] The technical solution of this utility model is as follows:

[0009] A stepping device includes a front lifting frame and a rear lifting frame that are independent of each other, and a front stepping base plate and a rear stepping base plate that are hinged together by a drive device. A connecting cylinder has a degree of freedom to deflect left and right and a degree of freedom to deflect up and down relative to the front stepping base plate and / or the rear stepping base plate. The rear stepping base plate is connected to a reaction base. In this technical solution, the front and rear lifting frames support the tunnel boring machine (TBM) shield, enabling the TBM to rise and fall. When the front and rear lifting frames retract, the TBM shield slides and moves forward on the front and rear stepping plates. When the front and rear lifting frames rise, the TBM shield detaches from the front and rear stepping plates, allowing the front and rear stepping plates to move forward. The core of this technical solution lies in the fact that both the lifting frame and the stepping plate consist of at least two independent parts: the front lifting frame, the rear lifting frame, the front stepping plate, and the rear stepping plate. The front and rear lifting frames are independent and can rise and fall independently, while the front and rear stepping plates are independent and can adjust their relative angles, thus adapting to small curve downhill turns and small curve horizontal turns.

[0010] It should be noted that the above technical solution provides the core inventive concept of this utility model. Under the guidance of this core inventive concept, the number of lifting frames and stepping base plates is not limited. For example, in order to adapt to the stepping requirements of different models of tunneling machine shields or other equipment, more lifting frames and stepping base plates can be set. Under the guidance of the above core inventive concept, it can be clearly stated that adjacent stepping base plates are connected by connecting cylinders, and the connecting cylinders have the freedom of left and right deflection and the freedom of up and down deflection.

[0011] Based on the above technical solutions, as a preferred technical solution for the stepping device, the driving device is a connecting hydraulic cylinder or an electric cylinder, and at least two connecting hydraulic cylinders or electric cylinders are provided. This technical solution uses at least two connecting hydraulic cylinders, that is, the number of connecting hydraulic cylinders can be two, three, or more. It should be noted that, due to factors such as assembly space, drive control, and economy, the number of connecting hydraulic cylinders is not necessarily better the more there are. It is preferred to use two connecting hydraulic cylinders, which are symmetrically arranged on the left and right sides of the stepping base plate. The front end of the two cylinders is hinged to the rear part of the front stepping base plate, and the rear end is hinged to the front part of the rear stepping base plate.

[0012] Based on the above technical solutions, as a preferred technical solution for the stepping device, an even number of connecting cylinders are provided, and they are arranged symmetrically about the front or rear stepping base plate. This technical solution provides a preferred selection rule for the number of connecting cylinders and their layout, namely, using an even number of connecting cylinders such as two, four, or six, and symmetrically arranging them. That is, when one connecting cylinder is arranged on the left side of the stepping base plate, one connecting cylinder is also arranged on the right side of the stepping base plate; when two connecting cylinders are arranged on the left side of the stepping base plate, two connecting cylinders are also arranged on the right side of the stepping base plate. It should be noted that when multiple connecting cylinders are arranged on both sides of the stepping base plate, the multiple connecting cylinders on the same side are arranged side by side, that is, vertically arranged in multiple rows, avoiding the arrangement of connecting cylinders between the rear end face of the front stepping base plate and the front end face of the rear stepping base plate.

[0013] Based on the above technical solutions, as a preferred technical solution for the stepping device, the reaction base is connected to an anti-slippage cylinder for connecting the tunneling machine shield. This technical solution adds an anti-slippage cylinder, which not only makes the stepping process of turning downhill on small curves safer and more reliable, but also makes the stepping process of turning uphill on small curves safer and more reliable.

[0014] Based on the above technical solutions, as a preferred technical solution for the stepping device, the front stepping base plate and / or the rear stepping base plate are provided with a guide structure for adapting to the guide groove at the bottom of the tunnel. This technical solution adds a guide structure, which not only allows the front and rear stepping base plates to step more accurately along the tunnel, but also prevents lateral deviation of the front and rear stepping base plates when the tunnel boring machine shield slides along them, ensuring that the entire stepping process is performed with high precision along a preset small curve.

[0015] Based on the above technical solutions, as a preferred technical solution for the stepping device, both the front stepping base plate and the rear stepping base plate are provided with two guide structures at intervals. This technical solution provides a preferred selection of the number and spatial layout of the guide structures, that is, both the front and rear stepping base plates are connected to two guide structures, and the two guide structures on each stepping base plate are arranged at intervals. Preferably, the guide structures are located at the centerline position of the corresponding stepping base plate, and preferably at the bottom of the corresponding stepping base plate, and preferably adopt a rigid metal structure.

[0016] A tunneling machine using a stepping device, wherein the stepping device is the stepping device described in any of the above-mentioned technical solutions. That is, the main body of this technical solution is a tunneling machine. During non-tunneling transport processes such as the tunneling machine's stepping over stations, the stepping device described in the above-mentioned technical solution can adapt to working conditions such as small-curve horizontal turns, small-curve downhill turns, and small-curve uphill turns. It should be noted that the stepping device in the above-mentioned technical solution is not only applicable to the stepping over stations of the tunneling machine, but also applicable to the stepping of the tunneling machine in other scenarios; furthermore, the stepping device in the above-mentioned technical solution is not only applicable to the stepping of the tunneling machine, but also applicable to the stepping needs of other equipment.

[0017] Based on the above technical solutions, as a preferred technical solution for a tunneling machine using a stepping device, the tunneling machine is a double-shield tunneling machine, which can use its own auxiliary thrust cylinder to achieve its own sliding stepping. That is, the auxiliary thrust cylinder is supported on the reaction base, which can push its own tunneling machine shield to slide along the front stepping base plate and the rear stepping base plate.

[0018] Based on the above technical solutions, as a preferred technical solution for a tunneling machine using a stepping device, the cutterhead and front shield of the double-shield tunneling machine are connected to the front lifting frame, the support shield is connected to the rear lifting frame, the auxiliary thrust cylinder inside the shield body is adapted to the reaction base, and the main thrust cylinder between the outer telescopic shield and the inner telescopic shield is in a follow-up state.

[0019] Based on the above technical solutions, as a preferred technical solution for tunneling machines using a stepping device, the anti-slippage cylinder is connected between the support shield and the reaction base. This technical solution provides a preferred connection method for the anti-slippage cylinder, which can prevent the tunneling machine shield from slipping downhill when turning on a small curve downhill, and can work together with the auxiliary thrust cylinder when turning on a small curve uphill.

[0020] Compared with existing technologies, the stepping device proposed in this invention can adapt to small-curve horizontal turns, small-curve downhill turns, and small-curve uphill turns, and is particularly suitable for the stepping requirements of dual-shield tunneling machines in non-tunneling states. It should be noted that the stepping device is not only applicable to the stepping of tunneling machines during station crossings, but also to the stepping of tunneling machines in other scenarios; furthermore, the stepping device in the above technical solution is not only applicable to the stepping of tunneling machines, but also to the stepping requirements of other equipment. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 The side view of the stepper device in its application state does not show the lifting frame;

[0023] Figure 2 A cross-sectional view showing the application state of the stepper device;

[0024] Figure 3 The anti-slip cylinder is not shown in the top view of the stepping device;

[0025] Figure 4 A schematic diagram illustrating the right turn of the effective curve of the stepper device;

[0026] Figure 5 This is a schematic diagram of a stepper device turning down a small curve.

[0027] Explanation of icon numbers:

[0028] Front stepping base plate 1, connecting cylinder 3, rear stepping base plate 2, reaction base 4, anti-slip cylinder 5, stepping anti-slip cylinder lug 6, guide column 7, front lifting frame 8, rear lifting frame 9;

[0029] Cutterhead 101, front shield 102, outer telescopic shield 103, inner telescopic shield 104, support shield 105, main beam 106, shield tail 107. Detailed Implementation

[0030] 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 core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0032] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0034] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0035] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0036] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0037] One objective of this invention is to provide a safe, efficient, and cost-effective method for shaft excavation under suspended conditions in the receiving section of a shaft. To achieve this objective, this invention mainly employs three technical means: dynamically adjusting excavation parameters, a coordinated muck removal mechanism, and synchronous support during excavation. Specific embodiments are as follows.

[0038] A stepping device, such as Figures 1 to 5 As shown, the device includes an independent front lifting frame 8 and a rear lifting frame 9. The structures of the front and rear lifting frames 8 are the same as in existing technology; they are devices used to lift the tunnel boring machine shield and other equipment requiring movement. Their upper surfaces are in contact with the equipment to be lifted, while their lower surfaces are supported on the ground. Lifting is achieved through hydraulic cylinders. It should be noted that the lifting frames for the tunnel boring machine shield are arranged in pairs; that is, both the front lifting frame 8 and the rear lifting frame 9 include two lifting frames, one on the left and one on the right.

[0039] The stepping device also includes a front stepping base plate 1 and a rear stepping base plate 2 hinged together by a drive device. The front stepping base plate 1 and the rear stepping base plate 2 can have the same structure as the one-piece stepping base plate in the prior art. The unique feature is that this embodiment uses the front stepping base plate 1 and the rear stepping base plate 2 to form the entire stepping base plate, and the two are hinged together by a drive device. That is, the front stepping base plate 1 and the rear stepping base plate 2 can be displaced and deflected by the drive device.

[0040] Preferably, the driving device is a hydraulic cylinder 3 or an electric cylinder, and at least two hydraulic cylinders 3 or electric cylinders are provided.

[0041] Specifically, the connecting cylinder 3 has a degree of freedom of left-right rotation and a degree of freedom of up-down rotation relative to the front stepping base plate 1 and / or the rear stepping base plate 2. That is, in addition to its basic function of extension and retraction, the connecting cylinder 3 also has two degrees of freedom of relative left-right rotation and up-down rotation. It should be noted that the connecting cylinder 3 can be connected to the front stepping base plate 1 via a ball joint structure, or to the rear stepping base plate 2 via a ball joint structure, or both ends can be connected to the front stepping base plate 1 and the rear stepping base plate 2 via ball joint structures respectively.

[0042] The rear stepping base plate 2 is connected to a reaction base 4, which supports the equipment to be stepped. For example, the tail of the equipment to be stepped is supported on the reaction base 4 by a telescopic device such as a hydraulic cylinder, lead screw, or electric cylinder, so that the equipment to be stepped slides along the front stepping base plate 1 and the rear stepping base plate 2. After the equipment to be stepped slides along the front stepping base plate 1 and the rear stepping base plate 2 for one stroke, the telescopic device such as the hydraulic cylinder, lead screw, or electric cylinder retracts, and the equipment to be stepped is lifted off the front stepping base plate 1 and the rear stepping base plate 2 by the front lifting frame 8 and the rear lifting frame 9. Then the front stepping base plate 1 and the rear stepping base plate 2 are moved forward one stroke, and then the front lifting frame 8 and the rear lifting frame 9 lower the equipment to be stepped, and the next stepping cycle begins.

[0043] In this embodiment, the front lifting frame 8 and the rear lifting frame 9 are used to support the tunneling machine shield body to realize the lifting and lowering of the tunneling machine host. When the front lifting frame 8 and the rear lifting frame 9 are retracted, the tunneling machine shield body slides and steps on the front stepping base plate 1 and the rear base plate 2. When the front lifting frame 8 and the rear lifting frame 9 are raised, the tunneling machine shield body disengages from the front stepping base plate 1 and the rear stepping base plate 2, causing the front stepping base plate 1 and the rear stepping base plate 2 to step forward.

[0044] The core of this embodiment is that both the lift and the stepping plate include at least two independent parts, namely the front lift frame 8, the rear lift frame 9, the front stepping plate 1, and the rear stepping plate 2. The front lift frame 8 and the rear lift frame 9 are independent of each other and can be raised and lowered independently. The front stepping plate 1 and the rear stepping plate 2 are independent of each other and can adjust their relative angles, thereby adapting to small curve downhill turns and small curve horizontal turns.

[0045] It should be noted that in this embodiment, both the front stepping base plate 1 and the rear stepping base plate 2 are made of rigid metal; preferably, the reaction base 4 is also made of rigid metal.

[0046] This embodiment presents the core inventive concept of this utility model. Under the guidance of this core inventive concept, the number of lifting frames and stepping base plates is not limited. For example, in order to adapt to the stepping requirements of different models of tunneling machine shields or other equipment, more lifting frames and stepping base plates can be set. Under the guidance of the above core inventive concept, it can be clearly stated that adjacent stepping base plates are connected by connecting cylinders 3, and the connecting cylinders 3 have the freedom of left and right deflection and the freedom of up and down deflection.

[0047] Based on the above embodiments, in a preferred embodiment of the stepping device, at least two connecting cylinders 3 are provided. This embodiment uses at least two connecting cylinders 3, that is, the number of connecting cylinders 3 can be two, three, or more. Preferably, both ends of each connecting cylinder 3 are connected to the front stepping base plate 1 and the rear stepping base plate 2 through a ball joint structure.

[0048] It should be noted that, due to factors such as assembly space, drive control, and economy, the number of connecting cylinders 3 is not necessarily better the more there are. It is preferable to use two connecting cylinders 3, which are symmetrically arranged on the left and right sides of the stepper base plate. The front end is hinged to the rear part of the front stepper base plate 1, and the rear end is hinged to the front part of the rear stepper base plate 2.

[0049] Based on the above embodiments, as a preferred embodiment of the stepping device, the connecting cylinders 3 are provided in an even number and are arranged symmetrically about the front stepping base plate 1 or the rear stepping base plate 2.

[0050] This embodiment provides the preferred selection rules for the number of connecting cylinders 3 and their layout. That is, the number of connecting cylinders 3 can be an even number, such as two, four, or six. The layout is symmetrical. That is, when one connecting cylinder is arranged on the left side of the stepper base plate, one connecting cylinder 3 is also arranged on the right side of the stepper base plate. When two connecting cylinders are arranged on the left side of the stepper base plate, two connecting cylinders 3 are also arranged on the right side of the stepper base plate.

[0051] It should be noted that when multiple connecting cylinders 3 are arranged on both sides of the stepper base plate, the multiple connecting cylinders 3 on the same side are arranged in parallel, that is, arranged vertically in multiple rows, to avoid arranging connecting cylinders 3 between the rear end face of the front stepper base plate 1 and the front end face of the rear stepper base plate 2.

[0052] Based on the above embodiments, as a preferred embodiment of the stepping device, the reaction base 4 is connected to an anti-slippage cylinder 5 for connecting the tunnel boring machine shield. This embodiment adds the anti-slippage cylinder 5, which not only makes the stepping process of turning downhill on small curves safer and more reliable, but also makes the stepping process of turning uphill on small curves safer and more reliable.

[0053] Based on the above embodiments, as a preferred embodiment of the stepping device, the front stepping base plate 1 and / or the rear stepping base plate 2 are provided with a guide structure for adapting to the guide groove at the bottom of the tunnel.

[0054] This embodiment adds a guide structure, which not only allows the front stepping base plate 1 and the rear stepping base plate 2 to step along the tunnel more accurately, but also prevents the front stepping base plate 1 and the rear stepping base plate 2 from deviating laterally when the tunneling machine shield slides along the front stepping base plate 1 and the rear stepping base plate 2, so that the entire stepping process can be carried out with high precision along the preset small curve.

[0055] Preferably, the guide structure adopts a guide post 7, a guide block, or the like.

[0056] Based on the above embodiments, as a preferred embodiment of the stepping device, the front stepping base plate 1 and the rear stepping base plate 2 are each provided with two guide structures at intervals.

[0057] This embodiment provides a preferred number of guide structures and spatial layout, namely, the front stepping base plate 1 and the rear stepping base plate 2 are each connected to two guide structures, and the two guide structures on each stepping base plate are arranged at intervals.

[0058] Preferably, the guide structure is located at the centerline of the corresponding stepper base plate, and preferably at the bottom of the corresponding stepper base plate, and preferably adopts a rigid metal structure.

[0059] Preferably, the two guide structures on the same stepper base plate are located at the front and the other at the rear.

[0060] As a preferred embodiment of the stepping device, a TBM stepping device with a small curve turning radius is proposed to meet the stepping requirements for small curve downhill turns and horizontal turns, such as... Figures 1 to 5 As shown, it can meet the step requirements of the dual-shield TBM when turning downhill on small curves and making horizontal turns.

[0061] The core invention points include:

[0062] 1. The stepping base plate adopts a segmented form. The front shield and cutterhead slide on the front base plate, while the support shield and shield tail slide on the rear base plate, satisfying one stroke of stepping.

[0063] 2. At present, the stepper mechanism is not suitable for small curve turns. The base plate of the stepper mechanism can be segmented and connected by a mechanism to adapt to small curve horizontal turns.

[0064] 3. The lifting frame adopts a segmented design, with the front and rear lifting cylinders controlled separately to adapt to the needs of small curves and turns.

[0065] To achieve the above objectives, this embodiment includes a front stepping base plate 1, a rear stepping base plate 2, a connecting cylinder 3, a reaction base 4, an anti-slip cylinder 5, a stepping anti-slip cylinder lug 6, a guide column 7, a front lifting frame 8, and a rear lifting frame 9. The front stepping base plate 1 and the rear stepping base plate 2 are hinged together by the connecting cylinder 3.

[0066] like Figure 1As shown, it includes a cutterhead 101, a front shield 102, an outer telescopic shield 103, an inner telescopic shield 104, a support shield 105, a shield tail 107, and a main beam 106. The auxiliary thrust cylinder inside the shield body is used as a stepping thrust cylinder, which directly acts on the reaction base 4. The tail of the support shield 105 is connected to the anti-slip cylinder 5. The shield body moves forward on the front stepping base plate 1 and the rear stepping base plate 2. The anti-slip cylinder 5 is connected to the anti-slip cylinder lug 6 to prevent slippage. After the shield body is lifted by the front lifting frame 8 and the rear lifting frame 9, the anti-slip cylinder 5 is retracted, which has the function of moving the front stepping base plate 1 and the rear stepping base plate 2 forward.

[0067] Key core technologies: ① The stepping base plate is designed in sections, consisting of a front stepping base plate 1 and a rear stepping base plate 2, connected by a connecting cylinder 3 in the middle, which can realize horizontal small curve turning stepping; ② The lifting frame is designed in sections, consisting of a front lifting frame 8 and a rear lifting frame 9, which are controlled separately, and can realize vertical small curve turning stepping.

[0068] Therefore, according to this utility model, the purpose of small-curve turning and stepping of the dual-shield TBM can be achieved.

[0069] Further explanation of this embodiment:

[0070] The step design for turning on a small curve in a horizontal section is as follows:

[0071] The stepping base plate is designed in segments and connected by hydraulic cylinders. The cutter head 101, front shield 102, and outer telescopic shield 103 mainly slide on the upper surface of the front stepping base plate 1, while the support shield 105 and shield tail 107 mainly slide on the upper surface of the rear stepping base plate 2. During small curves in the horizontal section, such as... Figure 4 As shown, the front stepping base plate 1 enters the turning section first, followed by the rear stepping base plate 2. The connecting cylinder 3 on the right extends to achieve the turning of the stepping base plate. The double-shield TBM shield body can be passively extended through the turning main thrust cylinder.

[0072] The vertical segment small curve turning step design is as follows:

[0073] The stepping base plate features a segmented design, and the connecting hydraulic cylinder 3 can also accommodate small vertical curve changes; the lifting frame also features a segmented design, with the cutter head 101, front shield 102, and front lifting frame 8 welded and fixed, while the support shield 105 is welded and fixed to the rear lifting frame 9. Figure 5 As shown, the front stepping base plate 1 first enters the turning section of the shaft, and the main thrust cylinder inside the shield can be passively extended to achieve the shield turning. If it is not designed in sections, the stepping base plate and the lifting frame will be in a seesaw pattern, and the weight of the shield will be entirely on the top, causing damage to the stepping mechanism, and in severe cases, it will be unable to step.

[0074] A tunneling machine using a stepping device, wherein the stepping device is the stepping device described in any of the above embodiments. That is, the main body of this embodiment is a tunneling machine. During non-tunneling transport processes such as the tunneling machine's stepping over stations, the stepping device described in the above embodiments can adapt to working conditions such as small-curve horizontal turns, small-curve downhill turns, and small-curve uphill turns. It should be noted that the stepping device in the above embodiments is not only applicable to the stepping of the tunneling machine during station passes, but also applicable to the stepping of the tunneling machine in other scenarios; furthermore, the stepping device in the above embodiments is not only applicable to the stepping of the tunneling machine, but also applicable to the stepping needs of other equipment.

[0075] Based on the above embodiments, as a preferred embodiment of a tunneling machine using a stepping device, such as... Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the tunneling machine is a double-shield tunneling machine. It can use the auxiliary thrust cylinders of the double-shield tunneling machine to achieve its own sliding stepping. That is, the auxiliary thrust cylinders are supported on the reaction base 4, which can push the tunneling machine shield body to slide along the front stepping base plate 1 and the rear stepping base plate 2.

[0076] Based on the above embodiments, as a preferred embodiment of a tunneling machine using a stepping device, the cutterhead 101 and front shield 102 of the double-shield tunneling machine are connected to the front lifting frame 8, the support shield 105 is connected to the rear lifting frame 9, the auxiliary thrust cylinder inside the shield body is adapted to the reaction base 4, and the main thrust cylinder between the outer telescopic shield 103 and the inner telescopic shield 104 is in a follow-up state.

[0077] Based on the above embodiments, in a preferred embodiment of a tunneling machine using a stepping device, the anti-slip cylinder 5 is connected between the support shield 105 and the reaction base 4. This embodiment provides a preferred connection method for the anti-slip cylinder 5, which can prevent the tunneling machine shield from slipping downhill when turning on a small curve downhill, and can work together with the auxiliary thrust cylinder when turning on a small curve uphill. In addition, when the front lifting frame 8 and the rear lifting frame 9 lift the tunneling machine shield, the anti-slip cylinder 5 can also pull the reaction base 4 forward when it retracts, thereby driving the front stepping base 1 and the rear stepping base 2 to step forward.

[0078] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0079] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stepping device, characterized in that: It includes a front lifting frame (8) and a rear lifting frame (9) that are independent of each other, and also includes a front stepping base plate (1) and a rear stepping base plate (2) that are hinged by a drive device. The connecting cylinder (3) has a degree of freedom to deflect left and right and a degree of freedom to deflect up and down relative to the front stepping base plate (1) and / or the rear stepping base plate (2). The rear stepping base plate (2) is connected to a reaction base (4).

2. The stepping device according to claim 1, characterized in that: The driving device is a hydraulic cylinder (3) or an electric cylinder, and at least two hydraulic cylinders (3) or electric cylinders are provided.

3. The stepping device according to claim 2, characterized in that: The connecting cylinders (3) are provided in an even number and are arranged symmetrically about the front stepping base plate (1) or the rear stepping base plate (2).

4. The stepping device according to any one of claims 1-3, characterized in that: The reaction base (4) is connected to an anti-slip oil cylinder (5) for connecting the tunneling machine shield.

5. The stepping device according to claim 4, characterized in that: The front stepping base plate (1) and / or the rear stepping base plate (2) are provided with guide structures for adapting to the guide groove at the bottom of the tunnel.

6. The stepping device according to claim 5, characterized in that: The front stepping base plate (1) and the rear stepping base plate (2) are each provided with two guide structures at intervals.

7. A tunneling machine using a stepping device, characterized in that: The stepping device is the stepping device according to any one of claims 1-6.

8. The tunneling machine using a stepping device according to claim 7, characterized in that: The tunneling machine is a double-shield tunneling machine.

9. The tunneling machine using a stepping device according to claim 8, characterized in that: The cutterhead (101) and front shield (102) of the dual-shield tunneling machine are connected to the front lifting frame (8), the support shield (105) is connected to the rear lifting frame (9), the auxiliary thrust cylinder inside the shield body is adapted to the reaction base (4), and the main thrust cylinder between the outer telescopic shield (103) and the inner telescopic shield (104) is in a follow-up state.

10. The tunneling machine using a stepping device according to claim 8 or 9, characterized in that: The anti-slip cylinder (5) is connected between the support shield (105) and the reaction base (4).

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