Open type TBM support shoe buffer and straightening device

Abstract

The open type TBM support shoe buffer return device belongs to the field of tunnel engineering construction equipment. It is mainly designed to solve the problems of existing open type TBM tunneling process, such as support shoe around the hinge point to dump forward, etc. It is composed of two buffer return monomers. The fixed frame of the buffer return monomer includes a bottom plate and an ear plate. The bottom plate is provided with a leaf spring clamping groove and a leaf spring mounting groove. A fixed baffle is connected to the end of the bottom plate. The lower end of the leaf spring is located in the leaf spring mounting groove. There is a wedge between the leaf spring and the fixed baffle. A pressing plate is connected to the top of the fixed baffle. The front end of the pressing plate is provided with a jackscrew. The adjusting stud passes through the hole on the adjusting stud of the fixed baffle, the leaf spring and the leaf spring clamping groove, and then extends into the leaf spring clamping groove. The two ear plates of the fixed frame of the two buffer return monomers are respectively hinged with the cylinder ear seat and the hinge seat of the two push oil cylinders. The upper end of the leaf spring of one buffer return monomer extends into the leaf spring clamping groove of the other buffer return monomer. The advantage is that the support shoe will not dump forward around the hinge point.

Description

TECHNICAL FIELD

[0002] The application belongs to the field of tunnel engineering construction equipment, and particularly relates to an open TBM support shoe back-to-normal device. BACKGROUND

[0004] TBM is the abbreviation of full-face hard rock tunnel boring machine, and 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 structure form of TBM, the TBM includes a shield TBM and an open TBM. In recent years, the TBM is widely used in underground tunnel construction due to its safety and high efficiency. The open TBM mainly comprises a cutter head, a shield, a driving assembly, a support and propulsion system, a belt conveyor and other auxiliary systems. The support and propulsion system is a key part of the open TBM, and its main function is to transmit the torque generated by the cutter head rotating to excavate the rock wall and the thrust of the whole machine advancing, and the whole transmission process is achieved by repeatedly supporting the rock wall by the support shoe. During the tunneling step changing process, the support shoe needs to be detached from the rock wall and moved forward by one tunneling cycle and then support the wall. The support shoe and the support shoe oil cylinder are connected by multi-degree-of-freedom hinges, and the front part of the support shoe is connected by the propulsion oil cylinder. During the step changing process, the support shoe tilts forward around the hinge point due to the weight of the front end, causing the support shoe to be unable to fit the rock wall, the support shoe ring groove to be unable to align with the steel arch, the support shoe to slip during the tunneling process, and the tunneling efficiency to be reduced, which affects the construction safety and other serious problems. SUMMARY

[0006] The technical problem to be solved by the application is to provide an open TBM support shoe buffer back-to-normal device which can effectively solve the problems of the support shoe detaching from the wall during step changing, the support shoe tilting forward around the hinge point due to the weight of the front end, and improve the step changing efficiency.

[0007] The above object is achieved in that it is composed of two buffer return monomers of the same structure, each buffer return monomer comprises a fixing frame, the fixing frame comprises a bottom plate and two downwardly extending ear plates connected to the left and right ends of the bottom plate, a leaf spring clamping groove is fixed on the upper surface of the bottom plate of the fixing frame, a fixed baffle is connected to the end of the bottom plate of the fixing frame behind the leaf spring clamping groove through a bolt, the space between the rear side wall of the leaf spring clamping groove and the fixed baffle is a leaf spring mounting groove, the lower end of the leaf spring is located in the leaf spring mounting groove, the surface of the fixed baffle facing the leaf spring is gradually inclined to the leaf spring from top to bottom, a wedge is placed between the leaf spring and the fixed baffle, the inclined surface of the wedge is adapted to the inclined surface of the fixed baffle; the rear end of the pressing plate is connected to the top of the fixed baffle through a bolt, the front end of the pressing plate is located above the wedge, a jackscrew is installed at the front end of the pressing plate, the jackscrew is on the wedge, the leaf spring is positioned by the pressing plate and the wedge, an adjusting screw passing hole is arranged on the rear side wall of the leaf spring clamping groove, an adjusting screw passing hole is also arranged on the fixed baffle, the two adjusting screw passing holes are on the same straight line, an adjusting screw passing hole is also arranged on the leaf spring, the front end of the adjusting screw passes through the adjusting screw passing holes on the fixed baffle, the leaf spring and the rear side wall of the leaf spring clamping groove and then extends into the leaf spring clamping groove, and a nut is screwed on the adjusting screw exposed outside the fixed baffle.

[0008] The two ear plates of the fixing frame (the bottom plate of the fixing frame faces upward, and the ear plates face downward) of one of the buffer return monomers are arranged outside the ear plates of the cylinder ear seat and the hinged seat of the propulsion oil cylinder of the full-face hard rock tunneling machine located below and are hinged through a pin shaft; the two ear plates of the fixing frame of the other buffer return monomer are arranged outside the ear plates of the cylinder ear seat and the hinged seat of the propulsion oil cylinder of the full-face hard rock tunneling machine located above after the other buffer return monomer is rotated by 180° (i.e., the bottom plate of the fixing frame faces downward, and the ear plates face upward), and the two ear plates are hinged through a pin shaft; the two hinged seats are connected to the support shoes through pin shafts.

[0009] The upper end of the leaf spring of the buffer return monomer located below extends into the leaf spring clamping groove of the buffer return monomer located above, and the lower end of the leaf spring of the buffer return monomer located above extends into the leaf spring clamping groove of the buffer return monomer located below.

[0010] The advantages of the present application are that the device can effectively solve the problem that the support shoe is separated from the tunnel wall during step changing, the support shoe is inclined forward around the hinged point due to the weight of the front end, and the step changing efficiency is improved, and the leaf spring is fixed in a detachable structure, and the leaf spring can be quickly replaced after repeated use and failure. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a structural diagram of the buffer return monomer in the present application;

[0013] Fig. 2 is a schematic diagram of the connection state of the present application, the propulsion oil cylinder and the support shoe;

[0014] Fig. 3 is the process state diagram of the application. DETAILED DESCRIPTION

[0016] The application will be further described below Figs. 1-3 The application will be further described below

[0017] It is composed of two buffer return monomers with the same structure, each buffer return monomer includes a fixed frame, the fixed frame includes a bottom plate 1 and two downwardly extending ear plates 2 connected to the left and right ends of the bottom plate, a leaf spring clamping groove 3 is fixed on the upper surface of the bottom plate of the fixed frame, a fixed baffle 4 is connected to the end of the bottom plate of the fixed frame behind the leaf spring clamping groove through a bolt, the space between the rear side wall 6 of the leaf spring clamping groove and the fixed baffle is a leaf spring mounting groove 5, the lower end of the leaf spring 7 is located in the leaf spring mounting groove, the side of the fixed baffle facing the leaf spring gradually inclines from top to bottom towards the leaf spring, a wedge block 8 is placed between the leaf spring and the fixed baffle, the inclined surface of the wedge block is adapted to the inclined surface of the fixed baffle, the rear end of a pressing plate 9 is connected to the top of the fixed baffle through a bolt, the front end of the pressing plate is located above the wedge block, a jackscrew 10 is installed on the front end of the pressing plate, the jackscrew is on the wedge block, the leaf spring is positioned by the pressing plate and the wedge block, an adjusting screw passing hole is provided on the rear side wall of the leaf spring clamping groove, an adjusting screw passing hole is also provided on the fixed baffle, the two adjusting screw passing holes are on the same straight line, an adjusting screw passing hole is also provided on the leaf spring, the front end of the adjusting screw 12 extends into the leaf spring clamping groove through the adjusting screw passing holes on the fixed baffle, the leaf spring and the rear side wall of the leaf spring clamping groove, and a nut is screwed on the adjusting screw exposed outside the fixed baffle.

[0018] The two ear plates of the fixed frame of one of the buffer return monomers (the bottom plate of the fixed frame faces up, and the ear plates face down) are arranged outside the ear plates of the hinge seat 14 of the oil cylinder ear seat of the propulsion oil cylinder 11 of the full-face hard rock tunneling machine located below, and they are hinged through a pin shaft 13; the fixed frame of the other buffer return monomer is rotated by 180° (i.e., the bottom plate of the fixed frame faces down, and the ear plates face up), and the two ear plates of the fixed frame are arranged outside the ear plates of the hinge seat of the oil cylinder ear seat of the propulsion oil cylinder of the full-face hard rock tunneling machine located above, and they are hinged through a pin shaft; the two hinge seats are connected to the support shoes 15 through pin shafts.

[0019] The upper end of the leaf spring of the buffer return monomer located below extends into the leaf spring clamping groove of the buffer return monomer located above, and the lower end of the leaf spring of the buffer return monomer located above extends into the leaf spring clamping groove of the buffer return monomer located below.

[0020] Adjusting the pre-tightening amount of the two sets of buffer return monomer adjusting studs makes the leaf spring produce a clockwise torque around the hinged point 16 of the supporting shoe, thereby offsetting the counterclockwise torque around the hinged point generated by the front part of the supporting shoe, and the clockwise torque generated by the pre-tightening leaf spring is smaller than the counterclockwise torque of the supporting shoe itself, preventing the supporting shoe from falling backward. During the step-changing process, the supporting shoe is separated from the rock wall for a moment, and the supporting shoe tilts forward around the hinged point, at which time the two sets of supporting shoe buffer return devices produce opposite displacements, the two sets of supporting shoe buffer return devices interact with each other, and the clockwise torque generated thereby prevents the supporting shoe from tilting forward, and at the same time, the clockwise torque functions as a flexible buffer.

[0021] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An open TBM shoe buffer and straightening device, characterized by: The two buffer return monomers are same in structure, each buffer return monomer comprises a fixing frame, the fixing frame comprises a bottom plate (1) and two downwardly extending ear plates (2) connected to the left and right ends of the bottom plate, a leaf spring clamping groove (3) is fixed on the upper surface of the bottom plate of the fixing frame, a fixed baffle (4) is connected to the end of the bottom plate of the fixing frame behind the leaf spring clamping groove through a bolt, the space between the rear side wall (6) of the leaf spring clamping groove and the fixed baffle is a leaf spring mounting groove (5), the lower end of a leaf spring (7) is located in the leaf spring mounting groove, the surface of the fixed baffle facing the leaf spring gradually inclines to the leaf spring from top to bottom, a wedge block (8) is placed between the leaf spring and the fixed baffle, the inclined surface of the wedge block is adapted to the inclined surface of the fixed baffle, the rear end of a pressing plate (9) is connected to the top of the fixed baffle through a bolt, the front end of the pressing plate is located above the wedge block, a jackscrew (10) is installed on the front end of the pressing plate and is jacked on the wedge block, the leaf spring is positioned by the pressing plate and the wedge block, the rear side wall of the leaf spring clamping groove is provided with an adjusting screw passing hole, the fixed baffle is also provided with an adjusting screw passing hole, the two adjusting screw passing holes are on the same straight line, the leaf spring is also provided with an adjusting screw passing hole, the front end of an adjusting screw (12) is inserted into the leaf spring clamping groove through the adjusting screw passing holes on the fixed baffle, the leaf spring and the rear side wall of the leaf spring clamping groove, and a nut is screwed on the adjusting screw exposed outside the fixed baffle; The two ear plates of the fixing frame of one buffer return monomer are arranged outside the ear plate of the oil cylinder ear seat and the hinged seat (14) of the propulsion oil cylinder (11) of the full-face hard rock tunneling machine located below, and they are hinged through a pin shaft (13); the two ear plates of the fixing frame of the other buffer return monomer are arranged outside the ear plate of the oil cylinder ear seat and the hinged seat of the propulsion oil cylinder of the full-face hard rock tunneling machine located above after the other buffer return monomer is rotated by 180°, and they are hinged through a pin shaft; the two hinged seats are connected with the support shoe (15) through a pin shaft respectively; The upper end of the leaf spring of the buffer return monomer located below is inserted into the leaf spring clamping groove of the buffer return monomer located above, and the lower end of the leaf spring of the buffer return monomer located above is inserted into the leaf spring clamping groove of the buffer return monomer located below.

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