An open type TBM auxiliary shoe device

Abstract

The present invention discloses an open-type TBM auxiliary support shoe device, which solves the problems of limited support shoe area and single support shoe method of the open-type TBM support shoe mechanism in the prior art. The present invention comprises a main beam and a main support shoe arranged on the main beam, one side of the main support shoe is connected to the main beam through a propulsion cylinder, and the other side is provided with an auxiliary support shoe, which is connected through a connecting piece, and the connecting piece is provided with an auxiliary support corresponding to the main beam. The present invention adopts auxiliary support shoes to be used in conjunction with main support shoes, and can also be retracted and extended separately. When the surrounding rock is good, the auxiliary support shoes are recovered, and the main support shoes are used to tighten the cave wall to provide the propulsion reaction force and counter torque required for TBM propulsion; in the case of weak surrounding rock and broken surrounding rock, the surrounding rock can withstand less pressure, and the main support shoes and auxiliary support shoes are used to tighten the cave wall at the same time, which increases the contact area between the support shoes and the surrounding rock and reduces the contact pressure between the support shoes and the surrounding rock.

Description

Technical Field

[0001] The invention relates to the technical field of open TBM, and in particular to an auxiliary support shoe device of an open TBM. Background Art

[0002] TBM is the abbreviation of full-face hard rock tunnel boring machine. It is a special equipment for tunnel excavation and plays an important role in the construction of mountain tunnels and urban subways. According to the working principle and structural form of TBM, TBM includes shield TBM and open TBM. Open TBM can be divided into Kai type TBM and main beam TBM according to the support form. The main beam TBM is mainly composed of cutterhead, shield, drive assembly, propulsion system, rear support, belt conveyor and other auxiliary systems. As a key part of the open TBM, the propulsion system mainly transmits the torque generated by the rotation of the cutterhead to excavate the rock wall and the thrust of the whole machine. The support form of the main beam TBM is horizontal floating support, and the number of support shoes is usually two, one on each side. In the case of soft and broken surrounding rock, the rock can bear less pressure, which requires the support shoe area to be large enough to reduce the ground pressure of the support shoe (the contact pressure between the support shoe and the surrounding rock). There are two main types of support shoe structures currently in use. The first type is a slot reserved in the middle of the support shoe, and the support shoe spans a ring of steel arch frame. The support shoe and the steel arch frame are easy to match. This structure is widely used, but it is affected by the thrust stroke and the steel arch frame, and the support shoe area of ​​this structure is usually limited; the second type is two slots reserved on the support shoe, the slots match the steel arch frame, and the support shoe spans two rings of arch frames. The support shoe area is larger, but because the support shoe needs to span two rings of arch frames, in actual use, the support shoe slots need to match the two rings of steel arch frames at the same time, which is difficult to match and easily squeezes the steel arch frames. Currently, this structure of support shoes is rarely used. Summary of the invention

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes an open TBM auxiliary gripper device, which solves the problems of limited gripper area and single gripper method of the open TBM gripper mechanism in the prior art.

[0004] The technical solution of the present invention is implemented as follows: an open-type TBM auxiliary support shoe device includes a main beam and a main support shoe arranged on the main beam, one side of the main support shoe is connected to the main beam through a thrust cylinder, and the other side is provided with an auxiliary support shoe, and the auxiliary support shoe is connected through a connecting piece, and the connecting piece is provided with an auxiliary support corresponding to the main beam.

[0005] The auxiliary support shoes are symmetrically arranged on both sides of the main beam, and the auxiliary support shoes include auxiliary shoe plates and auxiliary support shoe cylinders. One end of the auxiliary support shoe cylinder is connected to the axial surface of the auxiliary shoe plate, and the other end is connected through a connecting piece; the radial surface of the auxiliary shoe plate is connected to the main support shoe through a connecting rod and an adjusting cylinder.

[0006] One end of the connecting rod is hinged to the main support shoe through a first pin shaft, and the other end is hinged to the auxiliary shoe plate through a second pin shaft; one end of the adjusting oil cylinder is hinged to the auxiliary shoe plate, and the other end is hinged to the main support shoe; and the adjusting oil cylinder is located below the connecting rod.

[0007] The connecting member includes an upper connecting beam and a lower connecting beam, and two groups of auxiliary shoe support cylinders are arranged in parallel up and down on the auxiliary shoe plate. The upper group of auxiliary shoe support cylinders are connected through the upper connecting beam, and the lower group of auxiliary shoe support cylinders are connected through the lower connecting beam; at least one auxiliary support is provided on the upper connecting beam.

[0008] The auxiliary support includes a guide seat, which cooperates with the guide groove on the connecting piece. A base plate is fixed inside the guide seat, a screw is vertically provided on the base plate, a cover plate is provided on the upper end of the screw, the cover plate is fixedly connected to the connecting piece, and a spring is provided between the cover plate and the base plate; a walking wheel is provided at the bottom of the guide seat.

[0009] A saddle frame is slidably arranged on the main beam, and a main support shoe oil cylinder is arranged on the saddle frame. One end of the main support shoe oil cylinder is connected with the saddle frame, and the other end is connected with the main support shoe.

[0010] The present invention is mainly implemented for the main beam TBM, and adopts auxiliary support shoes to be used in conjunction with the main support shoes, and can also be extended and retracted separately. When the surrounding rock is good, the auxiliary support shoes are recovered, and the main support shoes are used to tighten the tunnel wall to provide the propulsion reaction force and counter-torque required for TBM propulsion; in the case of weak surrounding rock and broken surrounding rock, the surrounding rock can withstand less pressure, and the main support shoes and auxiliary support shoes are used to tighten the tunnel wall at the same time, which increases the contact area between the support shoes and the surrounding rock and reduces the contact pressure between the support shoes and the surrounding rock. The support shoe method can be adjusted according to the working conditions, with better applicability and improved work efficiency. In addition, compared with the double-slot support shoes used to increase the support shoe area, the present invention can adjust the auxiliary support shoes by adjusting the extension and retraction of the oil cylinder, so that the auxiliary support shoes can better adapt to the steel arch frame, avoid the support shoes squeezing the arch frame, improve the coordination between the construction equipment, and be more flexible in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0012] Figure 1 It is a top view schematically showing the auxiliary support shoe of the present invention in an extended state.

[0013] Figure 2 It is a schematic diagram of the overall front view of the present invention.

[0014] Figure 3This is a cross-sectional view of the auxiliary support shoe structure of the present invention.

[0015] Figure 4 This is a diagram of the auxiliary support structure of the present invention.

[0016] Figure 5 It is a top view schematically showing the auxiliary support shoe of the present invention in a retracted state. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 creative work are within the scope of protection of the present invention.

[0018] like Figure 1-2 As shown, in Example 1, an open-type TBM auxiliary support shoe device includes a main beam 9 and a main support shoe 10 arranged on the main beam 9. The main support shoe 10 can adopt an existing support shoe mechanism. The main support shoe is a single-slot support shoe, which can make good use of the steel arch frame, and the auxiliary support shoe structure does not affect the use of the main support shoe. A saddle frame 12 is slidably provided on the main beam 9, and the saddle frame can move along the main beam under the action of the thrust cylinder. A main support shoe cylinder 11 is provided on the saddle frame 12, one end of the main support shoe cylinder 11 is connected to the saddle frame 12, and the other end is connected to the main support shoe 10. Under the action of the main support shoe cylinder, the main support shoe moves radially to tighten the hole wall. One side of the main support shoe 10 is connected to the main beam 9 through the thrust cylinder 13, and the other side is provided with an auxiliary support shoe. The thrust cylinder 13 is inclined with the main beam, and under the action of the thrust cylinder, the main support shoe can move axially along the main beam. The auxiliary support shoes are connected by the connector 3, that is, the auxiliary support shoes are arranged on both sides of the main beam, and the auxiliary support shoes on both sides are connected by the connector. The connector 3 is provided with an auxiliary support 8 corresponding to the main beam 9, and the lower part of the auxiliary support is in contact with the main beam to support the weight of the auxiliary support shoes. The auxiliary support shoes are connected to the main support shoes and can be retracted separately. When the surrounding rock is good, the auxiliary support shoes are retracted, and the main support shoes are used to tighten the tunnel wall to provide the thrust reaction force and counter torque required for TBM advancement. In the case of weak surrounding rock and broken surrounding rock, the surrounding rock can withstand less pressure. At the same time, the main support shoes and auxiliary support shoes are used to tighten the tunnel wall, which increases the contact area between the support shoes and the surrounding rock and reduces the contact pressure between the support shoes and the surrounding rock.

[0019] Furthermore, the auxiliary shoe is symmetrically arranged on both sides of the main beam 9, and the auxiliary shoe includes an auxiliary shoe plate 1 and an auxiliary shoe cylinder 2. One end of the auxiliary shoe cylinder 2 is connected to the axial surface of the auxiliary shoe plate 1, and the other end is connected through a connecting piece 3, that is, the auxiliary shoe cylinder and the connecting piece span the upper and lower parts of the main beam. Under the action of the auxiliary shoe cylinder 2, the auxiliary shoe plate 1 moves radially to tighten the hole wall. The radial surface of the auxiliary shoe plate 1 is connected to the main shoe 10 through a connecting rod 4 and an adjusting cylinder 7. The connecting rod 4 is connected to the auxiliary shoe plate 1 through a joint bearing. Under the action of the adjusting cylinder, the auxiliary shoe plate can swing back and forth to better adapt to the steel arch frame. One end of the connecting rod 4 is hinged to the main shoe 10 through a first pin 5, and the other end is hinged to the auxiliary shoe plate 1 through a second pin 6; under the action of the adjusting cylinder, the auxiliary shoe plate can swing around the second pin to adjust its angle. One end of the adjusting oil cylinder 7 is hinged to the auxiliary shoe plate 1, and the other end is hinged to the main support shoe 10; and the adjusting oil cylinder 7 is located below the connecting rod 4, so that the adjusting oil cylinder can be extended and retracted to realize the swing of the auxiliary shoe plate.

[0020] like Figure 3-5 As shown, embodiment 2 is an open type TBM auxiliary shoe device, the connecting member 3 includes an upper connecting beam 3-1 and a lower connecting beam 3-2 arranged in parallel, and two groups of auxiliary shoe cylinders 2 arranged in parallel are arranged on the auxiliary shoe plate 1, the upper group of auxiliary shoe cylinders 2 are connected through the upper connecting beam 3-1, and the lower group of auxiliary shoe cylinders 2 are connected through the lower connecting beam 3-2; at least one auxiliary support 8 is arranged on the upper connecting beam 3-1, and the auxiliary support can float up and down on the upper connecting beam. Two auxiliary supports can be symmetrically arranged as needed; used to support the weight of the auxiliary shoe.

[0021] Further, the auxiliary support 8 includes a guide seat 806, which cooperates with the guide groove 3-3 on the connecting member 3, that is, the guide seat is located in the guide groove and can slide up and down in the guide groove. A bottom plate 804 is fixed inside the guide seat 806, and a screw 802 is vertically arranged on the bottom plate 804. The upper end of the screw 802 extends upward from the connecting member and a cover plate 801 is arranged on the upper end. The screw 802 is connected to the cover plate 801 through a nut, and the cover plate 801 is fixedly connected to the connecting member 3 through bolts. The screw 802 is fixed to the connecting member under the action of the cover plate. A spring 803 is sleeved on the outside of the screw 802, and the spring 803 is located between the cover plate 801 and the bottom plate 804; the extension amount of the screw 802 is adjusted by the nut to achieve the adjustment of the spring preload force, and a walking wheel 805 is arranged at the bottom of the guide seat 806. The walking wheel 805 can move forward and backward on the main beam 9 together with the auxiliary support shoe 1. The pre-compression of the spring 803 can be adjusted by the screw 802 to support the auxiliary support shoe 1. When the TBM is adjusted vertically, the upper and lower distances between the main beam 9 and the auxiliary support shoe 1 will change, the spring 804 can be extended or compressed, and the guide seat 806 and the walking wheel 805 slide in the connecting member 3 to adapt to the adjustment of the TBM.

[0022] When the surrounding rock is good, the auxiliary support shoe 1 is retracted, and the main support shoe 10 holds the tunnel wall tightly, providing the reverse thrust and reverse torque during TBM excavation. In the case of weak surrounding rock or broken surrounding rock, the auxiliary support shoe 1 is extended, and together with the main support shoe 10, the auxiliary support shoe 1 and the main support shoe 10 are kept relatively fixed through the connecting rod 4 and the adjusting cylinder 7, and jointly bear the reverse thrust and reverse torque during TBM excavation.

[0023] The other structures are the same as those in Example 1.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An open type TBM auxiliary gripper device, comprising a main beam and a main gripper arranged on the main beam, characterized in that: One side of the main support shoe is connected to the main beam through a propulsion oil cylinder, and the other side is provided with an auxiliary support shoe, which is connected through a connecting piece, and the connecting piece is provided with an auxiliary support corresponding to the main beam; the propulsion oil cylinder is arranged obliquely with the main beam, and under the action of the propulsion oil cylinder, the main support shoe can move axially along the main beam; The auxiliary support shoes are symmetrically arranged on both sides of the main beam, and the auxiliary support shoes include auxiliary shoe plates and auxiliary support shoe cylinders. One end of the auxiliary support shoe cylinder is connected to the axial surface of the auxiliary shoe plate, and the other end is connected through a connecting piece; the radial surface of the auxiliary shoe plate is connected to the main support shoe through a connecting rod and an adjusting cylinder; the connecting rod is connected to the auxiliary shoe plate through a joint bearing, and under the action of the adjusting cylinder, the auxiliary shoe plate can swing back and forth to better adapt to the steel arch frame; One end of the connecting rod is hinged to the main support shoe through a first pin shaft, and the other end is hinged to the auxiliary shoe plate through a second pin shaft; under the action of the adjustment cylinder, the auxiliary shoe plate can swing around the second pin shaft to achieve the adjustment of its angle; The auxiliary support includes a guide seat, which cooperates with the guide groove on the connecting piece. A base plate is fixed inside the guide seat, a screw is vertically provided on the base plate, a cover plate is provided on the upper end of the screw, the cover plate is fixedly connected to the connecting piece, and a spring is provided between the cover plate and the base plate; a walking wheel is provided at the bottom of the guide seat.

2. The open type TBM auxiliary gripper device according to claim 1, characterized in that: One end of the adjusting oil cylinder is hinged to the auxiliary shoe plate, and the other end is hinged to the main support shoe; and the adjusting oil cylinder is located below the connecting rod.

3. The open type TBM auxiliary gripper device according to claim 1, characterized in that: The connecting member includes an upper connecting beam and a lower connecting beam, and two groups of auxiliary shoe support cylinders are arranged in parallel up and down on the auxiliary shoe plate. The upper group of auxiliary shoe support cylinders are connected through the upper connecting beam, and the lower group of auxiliary shoe support cylinders are connected through the lower connecting beam; at least one auxiliary support is provided on the upper connecting beam.

4. The open type TBM auxiliary gripper device according to claim 1, characterized in that: A saddle frame is slidably arranged on the main beam, and a main support shoe oil cylinder is arranged on the saddle frame. One end of the main support shoe oil cylinder is connected with the saddle frame, and the other end is connected with the main support shoe.

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