Gripper device and shield machine

Abstract

The present application provides a gripper shoe device and a shield machine, which relate to the technical field of shield machines, and aim to solve the problem of poor adaptability of double-shield TBMs in small-section tunnel projects in related technologies. The gripper shoe device includes a rotating support, which is used to connect to the top wall of the support shield; the gripper shoe device also includes a gripper shoe drive group, a rotation group, and a gripper shoe group symmetrically arranged along the radial direction of the shield machine; the gripper shoe drive group is used to connect to the side wall of the shield machine, and the rotation group is connected between the gripper shoe drive group and the rotating support; the gripper shoe group is connected to the side of the rotation group away from the rotation support. When the gripper shoe drive group is extended, the gripper shoe drive group drives the rotation group to rotate around the rotating support, and the rotation group drives the gripper shoe group to rotate. The gripper shoe group penetrates the side wall of the shield machine and holds the tunnel wall. The present application can increase the space for personnel operations, material transportation, etc., which is beneficial to avoid occupying a large space in the middle of the support shield section, and improve the adaptability of the double-shield TBM in small-section tunnel projects.

Description

Technical Field

[0001] The present application relates to the technical field of shield machines, and in particular to a support shoe device and a shield machine. Background Art

[0002] A TBM (Tunnel Boring Machine) is a type of machine used for full-face tunnel construction and is widely used in mountain tunnel excavation. The Double Shield TBM is a type of shield TBM that achieves rapid excavation by assembling segments simultaneously during excavation.

[0003] In recent years, the vast majority of my country's pumped-storage power station drainage corridors, gravity drainage tunnels, and urban water supply tunnels have been small-section tunnels. To accommodate these tunnels, the conventional double-shield TBM gripper system typically employs two horizontally arranged sets of gripper actuators. These gripper actuators simultaneously extend, causing the left and right grippers of the shield to simultaneously hold the tunnel wall in place, providing reaction force for tunneling.

[0004] However, the above-mentioned layout is subject to significant limitations in terms of personnel access, electrical and hydraulic piping and wiring, and main machine conveyor layout. The space for personnel operations and material transportation is relatively small, and the double-shield TBM has poor adaptability in small-section tunnel projects. Summary of the Invention

[0005] The embodiments of the present application provide a support shoe device and a shield machine, which can increase the space for personnel operations, material transportation, etc., which is beneficial to avoid occupying a larger space in the middle of the support shield section and improve the adaptability of the double shield TBM in small-section tunnel projects.

[0006] In order to achieve the above-mentioned purpose, the first aspect of an embodiment of the present application provides a shoe device, which is located in a shield machine and is used to tighten the tunnel wall; the shoe device includes a rotating support, and the rotating support is used to connect to the top wall of the tightening shield; the shoe device also includes a shoe drive group, a rotation group and a shoe group symmetrically arranged along the radial direction of the shield machine; the shoe drive group is used to connect to the side wall of the shield machine, and the rotation group is connected between the shoe drive group and the rotating support; the shoe group is connected to the side of the rotation group away from the rotating support, and when the shoe drive group is extended, the shoe drive group drives the rotation group to rotate around the rotating support, and the rotation group drives the shoe group to rotate, and the shoe group passes through the side wall of the shield machine and tightens the tunnel wall.

[0007] In a possible implementation, along the driving direction of the gripper drive group, an extension direction of the length of the gripper drive group forms an angle with respect to a horizontal axis, the rotation group drives the gripper group to rotate, and the gripper group holds the hole wall in an inclined direction.

[0008] In one possible implementation, along the radial direction of the gripper shoe device; when the diameter of the hole wall section is a first distance, the angle between the extension direction of the length of the gripper shoe drive group and the horizontal axis is less than 90°, and the cross-section of the gripper shoe device is a trapezoidal cross-section; or, when the diameter of the hole wall section is a second distance, the angle between the extension direction of the length of the gripper shoe drive group and the horizontal axis is equal to 90°, and the cross-section of the gripper shoe device is a rectangular cross-section; or, when the diameter of the hole wall section is a third distance, the angle between the extension direction of the length of the gripper shoe drive group and the horizontal axis is greater than 90°, and the cross-section of the gripper shoe device is an inverted triangular cross-section; the first distance is greater than the second distance, and the second distance is greater than the third distance.

[0009] In a possible implementation, the gripper shoe drive group includes a first gripper shoe drive member and a second gripper shoe drive member, the rotation group includes a first rotation member and a second rotation member, and the gripper shoe group includes a first gripper shoe and a second gripper shoe; along the radial direction of the shield machine, the first gripper shoe drive member and the second gripper shoe drive member are symmetrically connected to the side wall of the shield machine, the first rotation member is connected between the first gripper shoe drive member and the rotation support, and the second rotation member is connected between the second gripper shoe drive member and the rotation support; the first gripper shoe is connected to the first rotation member, and the second gripper shoe is connected to the second rotation member, and the first gripper shoe and the second gripper shoe are used to tighten the opposite sides of the tunnel wall in opposite directions.

[0010] In a possible implementation, the gripper drive assembly further includes a cylinder fixing seat; the cylinder fixing seat is used to be connected to the side wall of the shield machine, and the gripper drive member is connected to the cylinder fixing seat.

[0011] In a possible implementation, along the axial direction of the shield machine, the number of the rotating supports includes at least two, and at least two of the rotating supports are connected at intervals on the front and rear sides of the top wall of the tightening shield; the number of the gripper drive groups, the rotating groups and the gripper shoe groups includes at least two groups respectively, and at least two groups of the gripper shoe drive groups are connected at intervals on the front and rear sides of the side wall of the shield machine, at least two groups of the rotating groups are connected one-to-one between at least two groups of the gripper shoe drive groups and at least two rotating supports, and at least two groups of the gripper shoe groups are connected one-to-one to at least two groups of the gripper shoe drive groups.

[0012] In a possible implementation, the rotating support is rigidly fixed to the top wall of the tightening shield; and / or the gripper drive group and the rotating group are hinged via a pin; and / or the rotating group and the rotating support are hinged via a pin; and / or the gripper group and the rotating group are hinged via a pin.

[0013] In a possible implementation, the first gripper driving member and the second gripper driving member are gripper cylinders; and / or the first rotating member and the second rotating member are rotating arms.

[0014] A second aspect of the embodiments of the present application further provides a shield machine, comprising a shield body and a gripper shoe device, wherein the shield body comprises a tightening shield, and the gripper shoe device is located in the tightening shield.

[0015] In one possible implementation, guide grooves are respectively provided on two opposite side walls of the support shield along the radial direction of the shield machine, and the guide grooves pass through the side walls of the support shield. The first support shoe and the second support shoe of the support shoe device move in the two guide grooves in a one-to-one correspondence, and pass through the guide grooves to obliquely support the tunnel wall.

[0016] The embodiments of the present application provide a shoe device and a shield machine, wherein the shoe device includes a rotating support, a shoe drive group, a rotating group, and a shoe group. In this way, when the cross-section of the tunnel wall is large, the arrangement of the present application helps to avoid occupying the middle space inside the shield machine, while the space between the shoe drive groups can also be used for personnel operations, material transportation, component installation, etc.; when the cross-section of the tunnel wall becomes smaller, the space between the shoe drive groups is compressed, but a relatively large space can still be retained in the middle of the shield cross-section. Therefore, the present application can increase the space for personnel operations, material transportation, etc., which is beneficial to avoid occupying a larger space in the middle of the shield cross-section and improve the adaptability of the double-shield TBM in small-section tunnel projects.

[0017] The structure of the present application and its other application objectives and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A front cross-sectional view of a shield machine provided in an embodiment of the present application;

[0020] Figure 2 A side cross-sectional view of a shield machine provided in an embodiment of the present application;

[0021] Figure 3 The cross-sectional view of the shoe device provided in the embodiment of the present application when the diameter of the hole wall section is the first distance Figure 1 ;

[0022] Figure 4 The cross-sectional view of the shoe device provided in the embodiment of the present application when the diameter of the hole wall section is the second distance Figure 2 ;

[0023] Figure 5 The cross-sectional view of the shoe device provided in the embodiment of the present application when the diameter of the hole wall section is the third distance Figure 3 .

[0024] Description of reference numerals:

[0025] 100-shoe device;

[0026] 110-rotating support; 120-gripper drive assembly;

[0027] 121-first gripper driving member; 122-first oil cylinder fixing seat;

[0028] 123 - second gripper driving member; 124 - second oil cylinder fixing seat;

[0029] 130-rotation group; 131-first rotating member;

[0030] 132 - second rotating member; 140 - gripper assembly;

[0031] 141 - first gripper; 142 - second gripper;

[0032] 200-Tightening shield; 210-Guide groove;

[0033] 220-telescopic cylinder; 230-cavity wall. DETAILED DESCRIPTION

[0034] With the development of the national economy and the acceleration of tunnel construction, the shield method has become widely used due to its cost-effectiveness. The shield method is a fully mechanized construction method. It involves pushing a shield machine underground, using the shield casing and segments to support the surrounding rock to prevent collapse into the tunnel. Simultaneously, a cutting device excavates soil in front of the excavation face. The soil is then transported out of the tunnel by excavation machinery, where it is pressurized and pushed forward by jacks at the rear. Precast concrete segments are then assembled to form the tunnel structure.

[0035] Tunnel boring machines (TBMs) are categorized into three types based on their support structure: open, double-shield, and single-shield. Open TBMs are commonly used for hard rock construction, while single-shield TBMs are typically used for soft rock and unstable strata with high groundwater levels. Double-shield TBMs, also known as telescopic shield TBMs, have two tunneling modes, allowing them to be used in both hard and soft rock, and are often used in mixed strata.

[0036] In double-shield tunneling mode, when tunneling in relatively stable strata, the grippers on the rear shield tightly support the boom, providing counterforce for the cutterhead. The main thrust cylinder propels the TBM forward. The TBM's operating cycle is: tunneling and segment installation - gripper retraction and step change - re-support - and then tunneling and segment installation again.

[0037] In the prior art, double-shield TBM grippers typically feature two sets of gripper actuators arranged horizontally, one above the other. Specifically, the left and right gripper actuators simultaneously extend, causing the left and right grippers of the holding shield to simultaneously grip the tunnel wall, providing a counterforce for the equipment. However, this arrangement, with the two horizontal gripper cylinders occupying a significant amount of cross-sectional space, significantly restricts the use of double-shield TBMs in small-section tunnel projects in terms of personnel access, electrical and hydraulic piping and wiring, and mainframe conveyor layout. This creates limited space for personnel operations and material transportation, making double-shield TBMs less adaptable in small-section tunnel projects.

[0038] Based on the above-mentioned technical problems, the embodiments of the present application provide a shoe device and a shield machine, wherein the shoe device includes a rotating support, a shoe drive group, a rotating group and a shoe group. In this way, when the cross-section of the tunnel wall is large, the arrangement of the present application helps to avoid occupying the middle space inside the shield machine, while the space between the shoe drive groups can also be used for personnel operations, material transportation, component installation, etc.; when the cross-section of the tunnel wall becomes smaller, the space between the shoe drive groups is compressed, but the middle space of the support shield section can still retain a relatively large space. Therefore, the present application can increase the space for personnel operations, material transportation, etc., which is beneficial to avoid occupying a larger space in the middle of the support shield section and improve the adaptability of the double-shield TBM in small-section tunnel projects.

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] An embodiment of the present application provides a shield machine, which is used in a tunnel to excavate the tunnel strata.

[0041] The shield machine includes at least a cutterhead and a shield body, where at least including means that in addition to the cutterhead and the shield body, the shield machine may also include other structures such as a slag discharge device, a screw conveyor, and a rear trailer. This embodiment of the present application will not elaborate on this.

[0042] The shield body consists of a front shield, a support shield 200, and a tail shield, which are connected in sequence. The front shield is located on the side of the shield machine closest to the cutterhead, and the tail shield is located on the side away from the cutterhead. The support shield 200 is located between the front and tail shields. The cutterhead is connected to the front shield and is used to excavate the tunnel strata.

[0043] The tightening shield 200 is provided with a gripper device 100, wherein the working process of the gripper device 100 is as follows: when the entire machine is excavating, the left and right sets of gripper cylinders are extended at the same time, so that the left and right grippers are tightened on both sides of the tunnel wall at the same time. The shield body relies on this tightening force to provide support reaction force for the cutter head to advance and rotate to break rock, so as to ensure the normal excavation of the shield machine.

[0044] In the present application, refer to Figure 1 As shown, along the radial direction of the shield machine, guide grooves 210 can be respectively opened on the two opposite side walls of the support shield 200, and the guide grooves 210 pass through the side walls of the support shield 200. The first support shoe 141 and the second support shoe 142 of the support shoe device 100 move in the two guide grooves 210 in a one-to-one correspondence, and penetrate the guide grooves 210 to obliquely support the tunnel wall.

[0045] It should be noted that this embodiment does not limit the shape, number, or location of the guide grooves 210. For example, the guide grooves 210 may be rectangular, circular, or the like, and this embodiment does not limit this. For example, the shape of the guide grooves 210 may be compatible with the shapes of the first gripper shoe 141 and the second gripper shoe 142. This facilitates movement of the first gripper shoe 141 and the second gripper shoe 142 within the guide grooves 210, thereby improving the tightening force of the first gripper shoe 141 and the second gripper shoe 142.

[0046] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application provides a gripper device 100 , which may include a rotating support 110 , which is connected to the top wall of the shield machine. Specifically, the rotating support 110 is connected to the top wall of the tightening shield 200 .

[0047] In the embodiments of the present application, the connection method of the rotating support 110 is not limited. For example, the rotating support 110 can be rigidly connected to the top wall of the support shield 200, for example, by being fixed to the top wall of the support shield 200 via a flange, bolts, or other fasteners. Alternatively, the rotating support 110 can be directly welded to the support shield 200. This is not limited in the embodiments.

[0048] This is beneficial to increasing the connection stability and connection strength of the rotating support 110, and is beneficial to avoiding the risk of the rotating support 110 falling during the rotation process. At the same time, it can withstand the large rotational force of the rotating group 130, ensure the rotation effect of the rotating group 130, and further ensure that the support shoe group 140 holds the hole wall tightly.

[0049] Reference Figure 1 As shown, the gripper device 100 may include a gripper drive group 120, a rotation group 130, and a gripper group 140 symmetrically arranged along the radial direction of the shield machine; the gripper drive group 120 is connected to the side wall of the shield machine, and the rotation group 130 is rotationally connected between the gripper drive group 120 and the rotating support 110. The gripper group 140 is connected to the side of the rotation group 130 facing away from the rotating support 110.

[0050] It should be noted that a shield machine has an axial direction and a radial direction. The axial direction of the shield machine refers to the direction along the centerline of the tunnel, and the direction of movement of the cutterhead or boring drill bit is the axial direction. The radial direction of the shield machine, also called the diameter direction, is the direction perpendicular to the axial direction, such as the direction of tunnel segment construction.

[0051] For example, the radial direction of the shield machine can refer to Figure 1 and Figure 2 As shown by the arrow A in the middle, the axial direction of the shield machine can be referred to Figure 1 and Figure 2 Indicated by the direction of arrow B.

[0052] In the embodiment of the present application, the symmetrical arrangement along the radial direction of the shield machine means:

[0053] Exemplarily, the number of the gripper shoe drive group 120 may include two, for example, the gripper shoe drive group 120 may include a first gripper shoe drive 121 and a second gripper shoe drive 123, the first gripper shoe drive 121 and the second gripper shoe drive 123 are symmetrically arranged along the radial direction of the shield machine, and symmetrically connected to the side wall of the shield machine.

[0054] Exemplarily, the number of the rotating groups 130 may include two, for example, the rotating group 130 may include a first rotating member 131 and a second rotating member 132, the first rotating member 131 is rotatably connected between the first support shoe driving member 121 and the rotating support 110, and the second rotating member 132 is rotatably connected between the second support shoe driving member 123 and the rotating support 110.

[0055] Exemplarily, the number of the support shoe groups 140 may include two, for example, the support shoe group 140 may include a first support shoe 141 and a second support shoe 142, the first support shoe 141 is connected to the first rotating member 131, and the second support shoe 142 is connected to the second rotating member 132, and the first support shoe 141 and the second support shoe 142 are used to tighten the opposite sides of the hole wall in opposite directions.

[0056] Illustratively, in this embodiment, the first gripper driving member 121 may be a gripper cylinder, and the second gripper driving member 123 may be a gripper cylinder; the first rotating member 131 may be a rotating arm, and the second rotating member 132 may be a rotating arm.

[0057] The detailed working process of the gripper device 100 provided in the present application is as follows: when the shield machine is excavating, the first gripper shoe driving member 121 and the second gripper shoe driving member 123 extend, the first gripper shoe driving member 121 drives the first rotating member 131 to rotate around the rotating support 110, and the second gripper shoe driving member 123 drives the second rotating member 132 to rotate around the rotating support 110. The first gripper shoe 141 moves in the guide groove 210 of the tightening shield 200 as the first rotating member 131 rotates, and the second gripper shoe 142 moves in the guide groove 210 of the tightening shield 200 as the second rotating member 132 rotates. The first gripper shoe 141 and the second gripper shoe 142 obliquely tighten the tunnel wall to provide reaction force for the shield machine. When the shield machine changes steps, the first gripper drive 121 and the second gripper drive 123 retract, and the first gripper 141 and the second gripper 142 are retracted accordingly. The telescopic cylinder 220 retracts and drives the tightening shield 200 forward one stroke, waiting for the next stroke excavation.

[0058] In a possible implementation, along the driving direction of the gripper drive assembly 120 , an extension direction of the length of the gripper drive assembly 120 forms an angle with respect to the horizontal axis. The rotation assembly 130 drives the gripper assembly 140 to rotate, and the gripper assembly 140 holds the hole wall in an inclined direction.

[0059] It should be noted that the extension direction of the length of the gripper drive group 120 has an angle with respect to the horizontal axis, which helps to ensure that the two gripper cylinders are arranged obliquely. Compared with the two gripper cylinders arranged horizontally in the related art, the present application helps to avoid occupying a larger space in the middle of the cross-section of the tightening shield 200. Therefore, the double-shield TBM in small-section tunnel projects can help avoid restrictions in personnel passages, electrical and hydraulic piping and wiring, and main machine belt conveyor layout. There is more space for personnel operations and material transportation, which improves the adaptability of the double-shield TBM in small-section tunnel projects.

[0060] It should be noted that there is no limitation on the angle between the extension direction of the length of the gripper drive assembly 120 and the horizontal axis.

[0061] In one possible implementation, referring to Figure 3 As shown, along the radial direction of the gripper shoe device 100, when the diameter of the hole wall section is the first distance D1, the angle between the extension direction of the length of the gripper shoe drive group 120 and the horizontal axis is less than 90°, and the cross section of the gripper shoe device 100 is a trapezoidal cross section.

[0062] It should be noted that when the diameter of the tunnel wall section is the first distance, the cross-section of the tunnel is relatively large, and the cross-section of the support shoe device 100 is a trapezoidal cross-section. The oblique arrangement of the two support shoe cylinders is beneficial to avoid occupying the middle space of the cross-section. At the same time, the space between the two support shoe cylinders can also be used for personnel operations, material transportation or component installation.

[0063] Reference Figure 4 As shown, along the radial direction of the gripper shoe device 100, when the diameter of the hole wall section is the second distance D2, the angle between the extension direction of the length of the gripper shoe drive group 120 and the horizontal axis is equal to 90°, and the cross section of the gripper shoe device 100 is a rectangular cross section.

[0064] It should be noted that when the diameter of the hole wall section is the second distance, the section of the gripper device 100 is a trapezoidal section. The horizontal arrangement of the two gripper cylinders is beneficial to avoid occupying the middle space of the section. At the same time, the space between the two gripper cylinders can also be used for personnel operations, material transportation or component installation.

[0065] Reference Figure 5 As shown, along the radial direction of the gripper shoe device 100, when the diameter of the hole wall section is the third distance D3, the angle between the extension direction of the length of the gripper shoe drive group 120 and the horizontal axis is greater than 90°, and the cross section of the gripper shoe device 100 is an inverted triangle.

[0066] It should be noted that when the diameter of the tunnel wall section is the third distance, the tunnel section is relatively small, the cross-section of the gripper shoe device 100 is an inverted triangular cross-section, and the space between the gripper shoe cylinders is compressed, but the middle space of the gripper shield 200 section can still retain a relatively large space for personnel operations, material transportation or component installation, etc.

[0067] In the present application, refer to Figures 3 to 5 As shown, the first distance D1 is greater than the second distance D2, and the second distance D2 is greater than the third distance D3. Wherein, D1, D2, and D3 are the cross-sectional diameters of the tunnel wall respectively. Wherein, the tunnel wall 230 can refer to Figures 3 to 5 shown.

[0068] In one possible implementation, referring to Figure 1 As shown, the gripper drive assembly 120 may further include a cylinder mount; the cylinder mount is connected to the sidewall of the shield machine, and the gripper drive assembly 120 is connected to the cylinder mount. This provides installation support for the gripper drive assembly 120, which is beneficial for improving the fixation of the gripper drive assembly 120 and ensuring its normal operation.

[0069] Specifically, taking the first oil cylinder fixing seat 122 and the second oil cylinder fixing seat 124 as an example, the first gripper shoe driving member 121 is installed on the first oil cylinder fixing seat 122 , and the second gripper shoe driving member 123 is fixed on the second oil cylinder fixing seat 124 .

[0070] In one possible implementation, referring to Figure 2 As shown, along the axial direction of the shield machine, the number of the rotating supports 110 may include at least two, and the at least two rotating supports 110 are spaced apart and connected to the front and rear sides of the top wall of the shield machine.

[0071] For example, the number of the rotating supports 110 may include two, three, or more. In this embodiment, two rotating supports 110 are mainly used as an example for description.

[0072] Reference Figure 2 As shown, along the axial direction of the shield machine, the number of the gripper drive group 120, the rotation group 130 and the gripper group 140 can include at least two groups respectively. For example, the number of the gripper drive group 120, the rotation group 130 and the gripper group 140 can include two groups, three groups or more groups respectively.

[0073] In this embodiment, two gripper driving groups 120 , two rotation groups 130 and two gripper groups 140 are mainly used as an example for description.

[0074] At least two groups of gripper shoe drive groups 120 are connected at intervals on the front and rear sides of the side wall of the shield machine, at least two groups of rotation groups 130 are connected one-to-one between the at least two groups of gripper shoe drive groups 120 and at least two rotation supports 110, and at least two groups of gripper shoe groups 140 are connected one-to-one to the at least two gripper shoe drive groups 120.

[0075] In this way, when the entire machine is excavating, multiple groups of gripper drive groups 120 are extended, so that multiple groups of gripper groups 140 are simultaneously tightened on both sides of the tunnel wall. The shield body relies on this tightening force to provide support and reaction force for the cutter head to advance and rotate to break rock, so as to ensure the normal excavation of the shield machine.

[0076] In one possible implementation, the rotating support 110 can be rigidly connected to the top wall of the shield machine. For example, the rotating support 110 can be connected to the top wall of the shield machine via a flange connection, a clamp connection, a welded connection, or a threaded connection. This helps to enhance the connection strength of the rotating support 110, helps prevent the risk of the rotating support 110 falling, and thus ensures the normal operation of the first gripper shoe 141 and the second gripper shoe 142.

[0077] The gripper drive assembly 120 can be rigidly connected to the sidewall of the shield machine. For example, the gripper drive assembly 120 can be connected to the sidewall of the shield machine via a flange connection, a clamp connection, a weld connection, or a threaded connection. This helps to enhance the connection strength of the gripper drive assembly 120.

[0078] The gripper drive assembly 120 and the rotation assembly 130 can be hinged via a pin. This hinged connection allows the gripper drive assembly 120 and the rotation assembly 130 to withstand a large shear force, thereby ensuring the connection stability between the gripper drive assembly 120 and the rotation assembly 130.

[0079] The rotating assembly 130 and the rotating support 110 can be hingedly connected via a pin, and the gripper assembly 140 and the rotating assembly 130 can also be hingedly connected via a pin. This allows for greater shear forces to be applied between the rotating assembly 130 and the rotating support 110, and between the gripper assembly 140 and the rotating assembly 130, thereby ensuring the stability of the connections between the rotating assembly 130 and the rotating support 110, and between the gripper assembly 140 and the rotating assembly 130.

[0080] Therefore, the embodiment of the present application provides a shoe device and a shield machine, wherein the shoe device includes a rotating support, a shoe drive group, a rotating group, and a shoe group. In this way, when the cross-section of the tunnel wall is large, the arrangement of the present application helps to avoid occupying the middle space inside the shield machine, while the space between the shoe drive groups can also be used for personnel operations, material transportation, component installation, etc.; when the cross-section of the tunnel wall becomes smaller, the space between the shoe drive groups is compressed, but a relatively large space can still be retained in the middle of the shield cross-section. Therefore, the present application can increase the space for personnel operations, material transportation, etc., which is beneficial to avoid occupying a larger space in the middle of the shield cross-section and improve the adaptability of the double-shield TBM in small-section tunnel projects.

[0081] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0082] In the description of this application, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0083] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration. They can be directly connected or indirectly connected through an intermediate medium. They can also refer to internal connections between two elements or interactions between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gripper device, located in the support shield of a shield machine, used to support the tunnel wall, characterized in that: The gripper device includes a rotating support, and the rotating support is used to be connected to the top wall of the tightening shield; The gripper device further comprises a gripper drive group, a rotation group and a gripper group symmetrically arranged along the radial direction of the shield machine; the gripper drive group is used to be connected to the side wall of the shield machine, and the rotation group is rotatably connected between the gripper drive group and the rotation support; The gripper assembly is connected to a side of the rotating assembly away from the rotating support. When the gripper drive assembly is extended, the gripper drive assembly drives the rotating assembly to rotate around the rotating support, and the rotating assembly drives the gripper assembly to rotate. The gripper assembly penetrates the side wall of the shield machine and holds the tunnel wall tightly. Along the driving direction of the gripper drive group, the extension direction of the length of the gripper drive group forms an angle with respect to the horizontal axis, the rotation group drives the gripper group to rotate, and the gripper group holds the hole wall in an inclined direction; The gripper drive group includes a first gripper drive member and a second gripper drive member, the rotation group includes a first rotation member and a second rotation member, and the gripper group includes a first gripper and a second gripper; Along the radial direction of the shield machine, the first gripper driving member and the second gripper driving member are symmetrically connected to the side wall of the shield machine, the first rotating member is rotatably connected between the first gripper driving member and the rotating support, and the second rotating member is rotatably connected between the second gripper driving member and the rotating support; The first gripper shoe is connected to the first rotating member, and the second gripper shoe is connected to the second rotating member. The first gripper shoe and the second gripper shoe are used to tighten two opposite sides of the hole wall in opposite directions.

2. The gripper device according to claim 1, characterized in that Along the radial direction of the gripper device; When the diameter of the hole wall section is a first distance, the angle between the extension direction of the length of the gripper drive group and the horizontal axis is less than 90°, and the cross section of the gripper device is a trapezoidal cross section; Alternatively, when the diameter of the cross section of the cave wall is the second distance, the angle between the extension direction of the length of the gripper drive assembly and the horizontal axis is equal to 90°, and the cross section of the gripper device is a rectangular cross section; or, when the diameter of the cross section of the hole wall is a third distance, the angle between the extension direction of the length of the gripper drive assembly and the horizontal axis is greater than 90°, and the cross section of the gripper device is an inverted triangular cross section; The first distance is greater than the second distance, and the second distance is greater than the third distance.

3. The gripper device according to claim 1 or 2, characterized in that It also includes a cylinder fixing seat; the cylinder fixing seat is used to be connected to the side wall of the shield machine, and the support shoe driving group is connected to the cylinder fixing seat.

4. The gripper device according to claim 1 or 2, characterized in that Along the axial direction of the shield machine; The number of the rotating supports includes at least two, and the at least two rotating supports are connected to the front and rear sides of the top wall of the support shield at intervals; The number of the gripper shoe drive groups, rotation groups and gripper shoe groups includes at least two groups respectively, at least two groups of the gripper shoe drive groups are connected at intervals on the front and rear sides of the side wall of the shield machine, at least two groups of the rotation groups are connected one-to-one between at least two groups of the gripper shoe drive groups and at least two of the rotation supports, and at least two groups of the gripper shoe groups are connected one-to-one to at least two of the gripper shoe drive groups.

5. The gripper device according to claim 1 or 2, characterized in that: The rotating support is rigidly connected to the top wall of the tightening shield; and / or the gripper drive group is rigidly connected to the side wall of the shield machine; and / or the gripper drive group and the rotating group are hinged via a pin; and / or the rotating group and the rotating support are hinged via a pin; and / or the gripper group and the rotating group are hinged via a pin.

6. The gripper device according to claim 1 or 2, characterized in that: The first gripper driving member and the second gripper driving member are gripper cylinders respectively; and / or the first rotating member and the second rotating member are rotating arms respectively.

7. A shield machine, characterized in that: The invention comprises a shield body and the gripper device according to any one of claims 1 to 6, wherein the shield body comprises a tightening shield, and the gripper device is located in the tightening shield.

8. The shield machine according to claim 7, characterized in that: Along the radial direction of the shield machine, guide grooves are respectively provided on the two opposite side walls of the tightening shield, and the guide grooves pass through the side walls of the tightening shield. The first and second gripper shoes of the gripper device move in the two guide grooves in a one-to-one correspondence, and penetrate the guide grooves to obliquely tighten the tunnel wall.

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