Self-adaptive TBM stabilizer

Abstract

The utility model discloses a self-adaptive TBM stabilizer, and belongs to the field of tunnel boring machines. The device comprises a stabilizing part and a driving assembly. In the working process of the TBM equipment, the driving assembly drives the stabilizing part to extend out of the shield and abut against the tunnel wall. When the cutterhead continuously rotates to cut a tunnel face, the torque of the cutterhead is transmitted to the TBM shield, the TBM tunneling tunnel wall is tightly supported through the stabilizing part, the TBM shield can be prevented from twisting, and vibration generated by uneven stress of the TBM shield is restrained. Due to the fact that the top face of the stabilizing part is of the flat cambered surface structure, the stabilizing part is matched with the tunneled arc-shaped tunnel wall and cannot be embedded into the tunnel wall, the large contact face can guarantee the stability of contact with the tunnel wall, rock mass at the contact position can be prevented from being crushed, and meanwhile the supporting mode of not invading the rock mass can prevent the TBM shield from twisting and cannot cause propelling resistance at the same time. And meanwhile, a guide surface is arranged at the front end in the advancing direction, so that the resistance borne by the TBM in the tunneling moving direction is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel boring machine field, especially a kind of self-adapting TBM stabilizer. BACKGROUND

[0002] TBM, full name Tunnel Boring Machine, Chinese is full-face hard rock tunnel boring machine, is a kind of tunneling machine, mainly used for tunneling work.TBM includes shield body, shield body is cylindrical, and its front end is provided with cutterhead for extruding broken rock.TBM works, cutterhead will interact with rock body, under the action of rock body's reaction force, shield body can be twisted.

[0003] During the cutterhead tunneling construction process, cutterhead rotates to cut rock body by main drive system, and the torque is large during rotation, which can easily cause shield to twist and vibrate.In order to solve this problem, a stabilizer is usually provided on TBM to prevent shield from twisting.The existing solution is to insert the stabilizer into the rock layer to prevent the shield from twisting.However, during the construction process, as the cutterhead continuously rotates and continuously advances forward, the stabilizer inserted into the rock layer will increase the forward resistance of the entire equipment, causing the working load of the propulsion system to increase, affecting the tunneling efficiency of TBM, and at the same time, the long-term high-load operation of the equipment can also reduce the service life of the propulsion system.

[0004] For example, a Chinese invention patent application with publication number CN109505616A discloses a TBM anti-twist stabilizer and tunneling machine, which includes a mounting seat and a telescopic drive device for driving the mounting seat to move linearly; the mounting seat is provided with a roller for embedding into rock layer, and the roller is rotatably connected with the mounting seat, wherein the rotational axis of the roller is perpendicular to the linear motion direction of the mounting seat, and the rolling direction of the roller is consistent with the tunneling direction of TBM; the outer ring of the roller is provided with a cutting edge.

[0005] In the above patent application, the problem of large resistance during propulsion is solved by increasing the roller with cutting edge outer ring at the contact position between the stabilizer and the rock; although this structure reduces the forward resistance by rotating the roller, the cutting edge of the roller inserted into the rock layer can easily cause rock to break, which can cause the rock layer above the shield to collapse, thereby causing the machine to be stuck; and the contact area between the roller and the hole wall is small, so when the shield is deflected by the cutterhead torque, the stress area is too small to effectively support, so the TBM cutterhead rotating torque cannot be balanced, therefore, it is urgent to design a TBM stabilizer that can prevent TBM shield from twisting without increasing the propulsion resistance to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of self-adapting TBM stabilizer, can solve the problem of how to effectively prevent TBM shield torsion and not increase equipment propulsion resistance in tunnel boring machine in prior art.

[0007] The utility model discloses a kind of self-adapting TBM stabilizer, can solve the problem of how to effectively prevent TBM shield torsion and not increase equipment propulsion resistance in tunnel boring machine in prior art.

[0008] A kind of self-adapting TBM stabilizer, comprising:

[0009] Stabilizing portion, the top surface of the stabilizing portion is provided as arc, and the profile of the arc is perpendicular to the direction of the stabilizing portion moving with tunnel boring machine, the top of the stabilizing portion is provided with a guide surface, and the guide surface is located at the front end when the stabilizing portion moves;

[0010] Drive assembly, the drive assembly is fixedly arranged inside the shield, and is used to drive the stabilizing portion to move linearly.

[0011] In a scheme of the utility model: the top surface of the stabilizing portion is provided with anti-skid lines.

[0012] In a scheme of the utility model: the top of the stabilizing portion is provided with a wear-resistant layer.

[0013] In a scheme of the utility model: the shield is provided with a reserved hole for accommodating the stabilizing portion, and the stabilizing portion is gap-fitted with the reserved hole.

[0014] In a scheme of the utility model: the drive assembly is fixedly provided with a connecting plate, and the connecting plate is fixedly connected with the shield by bolts.

[0015] In a scheme of the utility model: the drive assembly is a hydraulic drive structure.

[0016] In a scheme of the utility model: the stabilizing portion is connected with the drive assembly through a connecting assembly.

[0017] In a scheme of the utility model: the connecting assembly comprises a first connecting piece and a second connecting piece, a connecting cavity is formed in the first connecting piece, the second connecting piece is movably arranged in the connecting cavity, and the first connecting piece and the second connecting piece are curved surface contact-fitted, the first connecting piece is fixedly connected to the movable end of the stabilizing portion or the drive assembly, and the second connecting piece is fixedly connected to the movable end of the drive assembly or the stabilizing portion.

[0018] In a scheme of the utility model: the first connecting piece is fixedly connected to the stabilizing portion by bolts, and the second connecting piece is fixedly connected to the movable end of the drive assembly by bolts.

[0019] In one scheme of the utility model, one end of the second connecting piece in the connecting cavity is provided with a stable groove, a balance block is further arranged in the connecting cavity, one end of the balance block is in contact with the stable groove, and the other end of the balance block abuts against the bottom surface of the stable part.

[0020] According to the self-adaptive TBM stabilizer, at least one of the following technical effects is achieved:

[0021] In the working process of the TBM device, the stable part is driven by the driving assembly to extend outward to the outside of the shield and abut against the tunnel wall. When the cutter head continuously rotates and cuts the tunnel face, the torque is transmitted to the TBM shield, the TBM tunnel wall is braced by the stable part, the TBM shield is prevented from being twisted, and the vibration of the TBM shield caused by uneven force is inhibited. Since the top surface of the stable part is a flat arc surface structure, it is adapted to the curved tunnel wall during excavation and will not be embedded in the inside of the tunnel wall. The large contact surface can ensure the stability of the contact with the tunnel wall and prevent the rock at the contact position from being crushed. At the same time, the support mode without invading the rock can prevent the TBM shield from being twisted and can also prevent the advancing resistance. At the same time, a guide surface is arranged at the front end in the advancing direction, which further reduces the resistance in the advancing direction of the TBM.

[0022] The stable part cooperates with the gap of the reserved hole, a certain gap is reserved between the stable part and the TBM shield as a deflection space, and a spherical hinge structure is formed between the stable part and the driving assembly, so that the stable part can be articulated and deflected within a certain range. The stable part has a certain self-adaptive adjustment activity in each direction, can inhibit the vibration of the TBM shield caused by uneven force, and can prevent the sealing assembly in the driving assembly of the stabilizer from being damaged due to radial load. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments with reference to the following drawings, in which:

[0024] Figure 1 A structure schematic view of a self-adaptive TBM stabilizer provided by the utility model is installed on a shield;

[0025] Figure 2 A structure schematic view of a self-adaptive TBM stabilizer provided by the utility model is installed on a shield;

[0026] Figure 3 A self-adaptive TBM stabilizer provided by the utility model Figure 2 structure schematic view of the right view;

[0027] Figure 4 The utility model provides a kind of self-adapting TBM stabilizer Figure 3 The structure diagram of middle section of profile;

[0028] Figure 5 The utility model provides a kind of self-adapting TBM stabilizer stretches out shield front section of profile structure diagram;

[0029] Figure 6 The utility model provides a kind of self-adapting TBM stabilizer stretches out shield rear section of profile structure diagram.

[0030] Mark explanation:

[0031] 1, shield;

[0032] 2, drive assembly;201, connecting plate;

[0033] 3, connecting assembly;301, first connecting piece;302, second connecting piece;303, balance block;

[0034] 4, stabilizing portion. Specific implementation

[0035] To make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in conjunction with the drawings in the utility model embodiment, apparently, the described embodiment is only a part of the utility model, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0036] As Figures 1-6 Indicated, the utility model embodiment provides a kind of self-adapting TBM stabilizer, including stabilizing portion 4 and drive assembly 2. The stabilizing portion 4 is used to abut TBM tunneling wall when using, is used to provide supporting and stabilizing effect, prevent shield 1 twist. The drive assembly 2 is used to drive the movement between stabilizing portion 4, so that stabilizing portion 4 stretches out and abuts wall or back off and separates wall.

[0037] Please refer to Figures 1-6In one of the embodiments of the utility model, the driving assembly 2 is fixedly arranged inside the shield 1, the driving assembly 2 can select specific driving structure according to actual use, as an example, the driving assembly 2 can be hydraulic drive structure. The driving assembly 2 can be directly fixedly connected with the shield 1, or can be fixedly connected through other structures. As an example, the connecting plate 201 is fixedly arranged on the driving assembly 2, and the connecting plate 201 is fixedly connected with the shield 1 through bolts. Specifically, the connecting plate 201 can be located at the front side of the driving assembly 2 along the moving direction of TBM tunneling, so as to ensure stable connection.

[0038] Please refer to Figures 1-6 In one of the embodiments of the utility model, the stabilizing part 4 can be provided as a block structure. The stabilizing part 4 has a top surface and a front end, the top surface is the end surface of the end away from the shield 1, used for contacting with the hole wall, and the front end is the end located at the front side along the moving direction of TBM tunneling (in Figure 5 , the advancing direction of TBM tunneling is from right to left). The top surface of the stabilizing part 4 is provided as an arc shape, and the profile of the arc shape is perpendicular to the moving direction of the stabilizing part 4 along the TBM. Since the hole wall excavated by the tunneling machine is an arc structure, by providing the top surface of the stabilizing part 4 as a flat arc surface structure, the stabilizing part 4 can be effectively contacted with the hole wall, and insertion into the hole wall is avoided, so that the resistance caused by the movement of the TBM is not increased, and the rock body at the contact position can be prevented from being crushed, so that the rock breaking and falling condition is not caused. Further, the top of the stabilizing part 4 is provided with a guide surface, and the guide surface is located at the front end when the stabilizing part 4 moves; by providing the guide surface, the resistance received by the moving direction of the TBM tunneling is further reduced. The guide surface can be a chamfer structure or a round corner structure provided on the edge of the front end of the top surface of the stabilizing part 4, that is, the guide surface can be an inclined plane or an arc surface structure.

[0039] Please refer to Figures 1-6 In one of the embodiments of the utility model, the top surface of the stabilizing part 4 can be provided with anti-skid lines to improve the resistance that can be provided after contacting with the hole wall, and to ensure the stabilizing effect of the shield 1. The anti-skid lines can be provided as a plurality of strip lines, and the plurality of strip lines are sequentially arranged along the moving direction of the stabilizing part 4. The top of the stabilizing part 4 can be provided with a wear-resistant layer. The wear-resistant layer can be obtained by carburizing, nitriding, hard anodic oxidation, chrome plating, surface quenching and metal infiltration and the like. By providing the wear-resistant layer, the service life of the stabilizing part 4 is effectively improved.

[0040] Please refer to Figures 1-6In one of the embodiments of the utility model, the shield 1 is provided with a reserved hole for accommodating the stabilizer 4, and the stabilizer 4 is in clearance fit with the reserved hole. When the stabilizer 4 is extended to the outside of the shield 1 without load, there is a certain width gap between each edge of the stabilizer 4 and the edge position of the reserved hole. By setting the gap as a reserved deflection space, the sealing assembly inside the stabilizer driving assembly 2 can be prevented from being damaged by the radial load.

[0041] Please refer to Figures 1-6 In one of the embodiments of the utility model, the stabilizer 4 and the movable end of the driving assembly 2 can be connected through the connecting assembly 3. The connecting assembly 3 can be composed of a connecting plate 201, a connecting block and a locking bolt. As an example, the connecting assembly 3 includes a first connecting piece 301 and a second connecting piece 302, the first connecting piece 301 is provided with a connecting cavity, the second connecting piece 302 is movably arranged in the connecting cavity, and the first connecting piece 301 and the second connecting piece 302 are in curved surface contact fit, the first connecting piece 301 is fixedly connected to the stabilizer 4 or the movable end of the driving assembly 2, and the second connecting piece 302 is fixedly connected to the movable end of the driving assembly 2 or the stabilizer 4.

[0042] Please refer to Figures 1-6 In one of the embodiments of the utility model, as an example, the first connecting piece 301 is fixedly connected to the stabilizer 4 through a bolt, and the second connecting piece 302 is fixedly connected to the movable end of the driving assembly 2 through a bolt. The first connecting piece 301 is provided with a connecting cavity with a curved surface periphery, and the end of the connecting cavity away from the stabilizer 4 is communicated with the outside to form a connecting port. The second connecting piece 302 is provided with a curved surface, and the second connecting piece 302 is located in the connecting cavity, the edge of the second connecting piece 302 is in curved surface contact fit with the inner side of the first connecting piece 301, and one end of the second connecting piece 302 is extended from the connecting port and fixedly connected to the driving assembly 2. In this way, a spherical hinge structure is formed between the stabilizer 4 and the driving assembly 2, so that the stabilizer 4 has a certain self-adaptive adjustment activity in each direction, the vibration of the TBM shield 1 caused by uneven stress can be inhibited, and the sealing assembly inside the stabilizer driving assembly 2 can be further prevented from being damaged by the radial load.

[0043] Please refer to Figures 1-6In one of the embodiments of the utility model, one end of second connecting piece 302 is provided with a stable groove in the connecting cavity, the connecting cavity is further provided with a balance block 303, one end of balance block 303 is in contact with the stable groove, and the other end of balance block 303 abuts against the bottom surface of stable part 4. The other end of balance block 303 can also be fixedly connected with stable part 4, or a containing groove can be formed in the bottom end of stable part 4, and the other end of balance block 303 is located in the containing groove. The stability between stable part 4 and connecting assembly 3 of the ball hinge structure is ensured by the balance block 303.

[0044] The working principle of the utility model is as follows:

[0045] In the working process of the TBM device, stable part 4 is driven by driving assembly 2 to extend outward to the outside of shield 1 and abut against the tunnel wall. When the cutter head continuously rotates and cuts the rock surface, the torque is transmitted to TBM shield 1, and stable part 4 is tightened, so that the TBM shield 1 is prevented from being twisted, and the vibration of the TBM shield 1 caused by uneven stress is inhibited. The top surface of stable part 4 is a flat arc surface structure, which is matched with the curved tunnel wall during excavation, and will not be embedded in the tunnel wall. The large contact surface can ensure the stability of the contact with the tunnel wall, and can prevent the rock at the contact position from being crushed. At the same time, the support mode without invading the rock mass can prevent the TBM shield 1 from being twisted without causing the advancing resistance. At the same time, a guide surface is arranged at the front end in the advancing direction, which further reduces the resistance in the advancing direction of the TBM.

[0046] Stable part 4 cooperates with the gap between the reserved hole, a certain gap is reserved between stable part 4 and TBM shield 1 as a deflection space, and a ball hinge structure is formed between stable part 4 and driving assembly 2, so that stable part 4 can be articulated and deflected within a certain range, so that stable part 4 has a certain self-adaptive adjustment activity in each direction, and can inhibit the vibration of TBM shield 1 caused by uneven stress, and can prevent the sealing assembly in the stable part driving assembly 2 from being damaged due to the radial load.

[0047] The above embodiment of the utility model is described in detail, but the content is only the preferred embodiment of the utility model, and cannot be considered as limiting the scope of the utility model. Any equivalent changes and improvements within the scope of the utility model application shall still belong to the scope of the claims of the utility model.

[0048] In the description of the utility model, it is necessary to explain, the term "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relation is based on the orientation or positional relation shown in the drawing, or it is the orientation or positional relation of the utility model product when using usually placed, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the restriction of the utility model. In addition, the term "first", "second", "third" and so on are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0049] In the description of the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0050] In the description of the utility model, it is also necessary to explain that, unless otherwise specified and limited, the terms "set", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. An adaptive TBM stabilizer, characterized by, Include: The top surface of the stabilizing part is arranged as an arc shape, and the contour of the arc shape is perpendicular to the direction of the stabilizing part moving with the tunneling machine, and the top of the stabilizing part is provided with a guide surface, which is located at the front end when the stabilizing part moves; The driving assembly is fixedly arranged in the inside of the shield and is used for driving the straight movement of the stabilizing part.

2. The self-adapting TBM stabilizer of claim 1, wherein, The top surface of the stabilizing part is provided with anti-skid lines.

3. An adaptive TBM stabilizer according to claim 2, wherein, The top of the stabilizing part is provided with a wear-resistant layer.

4. The self-adapting TBM stabilizer of claim 1, wherein, A reserved hole for accommodating the stabilizing part is arranged on the shield, and the stabilizing part is gap-fitted with the reserved hole.

5. The self-adapting TBM stabilizer of claim 1, wherein, The driving assembly is fixedly provided with a connecting plate, and the connecting plate is fixedly connected with the shield through bolts.

6. An adaptive TBM stabilizer according to claim 5, wherein, The driving assembly is a hydraulic driving structure.

7. The self-adapting TBM stabilizer of claim 1, wherein, The stabilizing part is connected with the driving assembly through a connecting assembly.

8. An adaptive TBM stabilizer according to claim 7, wherein, The connecting assembly includes a first connecting piece and a second connecting piece, a connecting cavity is arranged in the first connecting piece, the second connecting piece is movably arranged in the connecting cavity, and the first connecting piece and the second connecting piece are in curved surface contact fit, the first connecting piece is fixedly connected with the movable end of the stabilizing part or the driving assembly, and the second connecting piece is fixedly connected with the movable end of the driving assembly or the stabilizing part.

9. An adaptive TBM stabilizer according to claim 8, wherein, The first connecting piece is fixedly connected with the stabilizing part through bolts, and the second connecting piece is fixedly connected with the movable end of the driving assembly through bolts.

10. The adaptive TBM stabilizer of claim 9, wherein, One end of the second connecting piece in the connecting cavity is provided with a stabilizing groove, and a balance block is further arranged in the connecting cavity, one end of the balance block is in curved surface contact fit with the stabilizing groove, and the other end of the balance block abuts against the bottom surface of the stabilizing part.

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