Vertical shifting device suitable for tunnel boring machine, tunnel boring machine and vertical shifting method thereof

Abstract

The present invention discloses a vertically shiftable shaft boring machine, comprising a support seat provided at the front end of the boring machine support arm and a fixed seat for docking and fixing a pipe segment, wherein the fixed seat can reciprocate up and down along the support seat; a self-locking wedge is provided on the boring machine support arm; a plurality of wedge semi-enclosed grooves are provided on the fixed seat along the direction of movement of the fixed seat; the wedge semi-enclosed grooves include a stop lock matching the tip of the self-locking wedge, a directional recess provided below the stop lock, and a side baffle connecting the stop lock and the directional recess; the self-locking wedge can enter or leave the wedge semi-enclosed groove under the action of a wedge drive mechanism. By matching the self-locking wedge with the wedge semi-enclosed groove, the support seat and the fixed seat are self-locked, preventing the support seat and the boring machine support arm from overtraveling when the oil cylinder provided in the support seat drives the fixed seat. The excavation and expansion effect of the shaft boring machine is greatly improved, thereby improving the construction efficiency of the vertical shaft construction using the boring machine for excavation.

Description

Technical Field

[0001] The present invention belongs to the field of underground large-diameter ultra-deep vertical shaft installation, and particularly relates to a vertical shifting device suitable for a tunnel boring machine, a tunnel boring machine and a vertical shifting method thereof. Background Art

[0002] At present, modern excavation equipment such as shield machines and pipe jacking machines are widely used in the construction of horizontal tunnels for urban subways and underground pipelines. However, the construction of corresponding vertical shafts such as subway starting and receiving shafts, civil air defense ventilation, and underground multi-story parking garages mostly adopts open excavation or traditional excavator construction methods, which have long construction periods, high site requirements and relatively high construction costs.

[0003] In contrast, the shaft boring machine working method has the characteristics of high mechanization, high shaft construction precision, small footprint, and low overall cost. In shaft construction, shaft boring machines have a broad market demand.

[0004] Existing shaft boring machines have multiple sets of support arms. The contact between the support arms and the pipe wall ensures that the milling head of the shaft boring machine can perform excavation operations on the ground below. Therefore, it is particularly important to ensure the synchronous lifting and lowering of the multiple sets of support arms. If there is a problem of insufficient support force in the support cylinder, the main machine will deviate downward.

[0005] When the construction depth of the tunnel boring machine is fixed, it is necessary to gradually expand the excavation on the circular working surface at the same depth. The main equipment must be fixed in depth to ensure the smooth progress of the construction work. Therefore, in the actual excavation process of the shaft tunnel boring machine, in order to achieve different excavation effects such as stepping the excavation depth of the same pipe wall end face or coordinating the stepping of the pipe wall, it is necessary to adjust the vertical height of the main machine of the tunnel boring equipment. In particular, during the construction process, the relative position of the support arm is easily changed when it is subjected to the reverse thrust of the milling head, causing the vertical accuracy of the excavation to decrease. Frequent calibration through monitoring and auxiliary mechanisms is required, which makes the construction difficult. In addition, once the vertical deviation of the excavation occurs, it will cause the well excavation operation to tilt or even damage the milling head, which will bring serious quality problems and safety hazards to the entire construction.

[0006] Therefore, there is a need for a vertical shift device that is suitable for use with the main engine and can automatically and smoothly switch gears while meeting the requirements of having a sufficiently high gear change. The tensioning structure in the working state should be simple and effective and easy to maintain. Summary of the Invention

[0007] The technical problem to be solved by the present invention is as follows: The purpose of the present invention is to solve the deficiencies in the prior art and to provide a vertically shiftable shaft boring machine with smooth shifting, simple and effective structure, and easy maintenance.

[0008] The technical solution of the present invention is as follows: The vertical shifting device for a shaft boring machine according to the present invention comprises a support seat provided at the front end of a supporting arm of the boring machine and a fixing seat for docking and fixing a pipe segment, wherein the fixing seat can reciprocate up and down along the support seat;

[0009] The tunnel boring machine support arm is provided with a self-locking wedge; the fixed seat is provided with a plurality of wedge semi-closed grooves along the movement direction of the fixed seat;

[0010] The wedge block semi-enclosed groove includes a stop lock matched with the tip of the self-locking wedge block, a directional recessed platform arranged below the stop lock, and a side baffle connecting the stop lock and the directional recessed platform;

[0011] The self-locking wedge can enter or leave the wedge semi-enclosed groove under the action of the wedge driving mechanism.

[0012] Furthermore, the fixing seat is provided with a guide plate unit, and the guide plate unit includes a plurality of parallel guide plates; the guide plates are provided with wedge block semi-closed grooves, and a guide groove is provided between two adjacent guide plates;

[0013] The self-locking wedge is provided with a guide block that matches the guide groove and can move along the guide groove.

[0014] Furthermore, a wedge block slide is provided at the lower end of the support seat, and the wedge block slide includes a wedge block push-pull guide block, and the front end of the wedge block push-pull guide block is arranged in the guide groove;

[0015] When the fixing seat reciprocates up and down along the supporting seat, the wedge block pushes and pulls the guide block to move relative to the guide groove.

[0016] Furthermore, the wedge block slide also includes a wedge block push rod limit plate; the wedge block push rod limit plate is provided with a drive rod groove for the drive rod of the wedge block drive mechanism to pass through, the drive rod groove is a square groove, and the length direction of the drive rod groove is parallel to the length direction of the guide groove.

[0017] Furthermore, a transverse reinforcement base plate is provided at the lower end of the fixing seat, and a wedge groove is provided at the lower end of the wedge semi-closed groove, and the wedge groove and the transverse reinforcement base plate constitute an end wedge semi-closed groove.

[0018] The present invention also discloses a shaft boring machine provided with a vertical shifting device, comprising a boring machine rotary body and a boring machine support arm for supporting the boring machine rotary body, wherein a milling head is provided at the lower end of the boring machine rotary body;

[0019] The tunnel boring machine support arms are uniformly distributed on the tunnel boring machine rotating body in the circumferential direction; the tunnel boring machine support arms are provided with a vertical shifting device as claimed in any one of the claims.

[0020] The present invention also discloses a vertical shifting method suitable for a shaft boring machine, comprising providing a fixing seat that can be fixed to the pipe segment, and setting the fixing seat on the support seat at the front end of the boring machine support arm through a lifting drive mechanism; the driving device can apply force to the fixing seat to push the support seat and the boring machine support arm upward or downward relative to the fixing seat;

[0021] A wedge block semi-enclosed groove is provided on the fixing seat, and a self-locking wedge block is provided at the front end of the tunnel boring machine support arm; the self-locking wedge block can enter or leave the wedge block semi-enclosed groove under the action of the wedge block driving mechanism;

[0022] When the self-locking wedge enters the semi-enclosed groove of the wedge, the lifting drive mechanism is self-locked;

[0023] When the self-locking wedge leaves the wedge semi-enclosed groove, the tunnel boring machine support arm can be driven to move upward or downward relative to the fixed seat through the lifting drive mechanism.

[0024] The beneficial effects of the present invention compared with the prior art are as follows:

[0025] 1. A semi-enclosed slot for the wedge blocks is used. The self-locking wedge blocks mate with the slots to achieve self-locking between the support and fixed bases, preventing the support and TBM support arms from overtravelling when the hydraulic cylinder within the support base drives the fixed base. The overall self-locking structure is simple and reliable, significantly improving the tunneling and excavation performance of the shaft TBM, thereby increasing the efficiency of shaft tunneling using TBMs.

[0026] 2. A directional concave platform is provided. When the wedge cylinder fails to retract the wedge toward the main machine, and if the supporting cylinder has insufficient support force, causing the main machine to move downward, the directional concave platform can quickly support the main machine and prevent it from tilting due to the lifting force of other cylinders. On the other hand, if the system controlling the supporting cylinder fails and all supporting cylinders cannot work normally, the directional concave platform can support the entire main machine equipment.

[0027] 3. With the help of the cooperation of the fixed seat and the wedge block, the support arm of the tunnel boring machine forms a self-locking function, which can realize the precise positioning of the tunnel boring machine body and the tight cooperation between the tunnel boring machine and the pipe segment. The pipe wall provides the basic guarantee of the verticality of the tunnel boring machine construction, and the vertical tunneling of the tunnel boring machine equipment provides guarantee for the installation of the pipe wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the specific structure of the vertical shifting device in the present invention;

[0029] Figure 2 This is a schematic diagram of the movement state of the fixing seat 5 along the supporting seat 3 in the present invention;

[0030] Figure 3 Schematic diagram of the specific structure of the self-locking wedge 4 in the present invention;

[0031] Figure 4 Schematic diagram of the self-locking state of the vertical shifting device in the present invention.

[0032] Figure 5 Schematic diagram of the state in which the self-locking wedge is separated from the wedge semi-enclosed groove in the present invention;

[0033] Figure 6 Schematic diagram of the specific structure of the fixing seat in the present invention;

[0034] Figure 7 This is a schematic diagram of the working state of the shaft boring machine in the present invention. DETAILED DESCRIPTION

[0035] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0036] like Figure 1-6 As shown, the present invention includes a support base 3 provided at the front end of the tunnel boring machine support arm 1 and a fixing base 5 for docking and fixing the pipe segment 90. The fixing base 5 can reciprocate up and down along the support base 3. A lifting drive mechanism 6 is provided in the support base 3.

[0037] A self-locking wedge 4 is provided on the support arm 1 of the tunnel boring machine; a plurality of wedge semi-enclosed grooves 50 are provided on the fixing seat 5 along the movement direction of the fixing seat 5;

[0038] The wedge block semi-enclosed groove 50 includes a stop lock buckle 5-8 matching the tip of the self-locking wedge block 4, a directional recessed platform 5-9 provided below the stop lock buckle 5-8, and a side baffle 5-89 connecting the stop lock buckle 5-8 and the directional recessed platform 5-9;

[0039] The self-locking wedge 4 can enter or leave the wedge semi-enclosed groove 50 under the action of the wedge driving mechanism.

[0040] The self-locking wedge 4 has the same outer structure as the stop lock 5-8 at the top, but is slightly shorter in the vertical direction. This length difference allows the wedge to be unlocked when the support seat at the current position moves slightly downward, allowing it to freely extend into and out of the wedge semi-enclosed slot 50.

[0041] Among them, the purpose of the support seat moving downward slightly is to unlock the designated lock. When the main equipment is on the same working surface for construction, a wedge block is required to lock the equipment. After completing the construction of this working surface and stepping to the next depth, it is necessary to unlock it first, and then move down or up under the action of the lifting drive mechanism.

[0042] When the support seat moves slightly upward, the wedge and the fixed seat are locked together by the stop lock 5-8. At this point, after the stop lock is unlocked, the roadheader slewing body 9 moves to the next designated position, that is, a new working surface, and needs to be locked again. At this time, the wedge drive mechanism 2 pushes the wedge into the wedge semi-enclosed groove 50, and then controls the lifting drive mechanism 6 to move upward and lock it. The roadheader slewing body 9 completes one step and enters the new working surface, and the cycle continues.

[0043] A guide plate unit is provided on the fixing seat 5, and the guide plate unit includes two parallel guide plates 5-6; a wedge semi-closed groove 50 is provided on the guide plate 5-6, and a guide groove 5-60 is provided between two adjacent guide plates 5-6; the self-locking wedge 4 is provided with a matching guide groove 5-60 and a guide block 41 that can move along the guide groove 5-60.

[0044] The locking catch is a notch cut into the guide plates 5-6. It expands vertically from the outside to the inside and then decreases to form a hook-shaped structure. This locks the vertical depth movement of the self-locking wedge 4, which fits snugly within it. By locking the self-locking wedge 4 in the vertical direction, it is prevented from moving in the tunneling depth direction. Because the wedges are distributed circumferentially around the main machine, they ultimately stabilize the main machine and lock the slewing body 9 of the tunneling machine.

[0045] When the construction depth of the tunnel boring machine's rotating body 9 is certain, it is necessary to gradually carry out excavation on the circular working surface at the same depth. The main equipment of the tunnel boring machine's rotating body 9 must be fixed at a depth to ensure the smooth progress of the construction work. Therefore, it is necessary to limit the vertical movement of the tunnel boring machine's rotating body 9, and the depth position of the main equipment in the same plane supported by the pipe segment is limited by setting a fixed seat with a stop lock and fastening it to the pipe segment.

[0046] The upper two of the three locking catches are also equipped with two directional recesses 5-9, which together with the locking catches form a semi-enclosed wedge slot 50, ensuring that a wedge entering this area is fully locked in the vertical direction. The bottom of the fixing base 5 also has a transverse reinforcement base plate 5-7 for the guide plates, which increases the lateral force between the two guide plates and also serves as the mounting base for the vertical cylinder 6.

[0047] The function of the wedge semi-enclosed slot 50 is to quickly support the mainframe if the wedge drive mechanism fails to retract the wedge toward the mainframe, or if the lift drive mechanism experiences insufficient support force, causing the mainframe to move downward. This prevents the mainframe from tilting due to the lifting force of other cylinders. Furthermore, if the system controlling the lift drive mechanism fails and all lift drive mechanisms are unable to operate normally, the directional recessed platform can provide support for the entire mainframe.

[0048] The reason for setting up the end wedge semi-closed groove is that there is a transverse reinforcement base plate 5-7 at the bottom of the fixed seat 5, which serves as a support guarantee at the bottom and can support the wedge slide 3-1 extending into the interior of the fixed seat. This has the same function as the directional recess, so there is no need to design a directional recess for the bottom wedge groove 500.

[0049] The wedge block slide 3 - 1 and the guide plate 7 extend between the guide plates 5 - 6 to form a groove guide, which limits the up and down movement of the support base 3 during gear shifting.

[0050] The lower end of the support base 3 is provided with a wedge slide 31 and a wedge push rod stop plate 311. The wedge push rod stop plate 311 is provided with a drive rod slot 312 for the wedge drive mechanism's drive rod to pass through. The drive rod slot 312 is a square slot, and its length is parallel to the length of the guide slot 5-60. The wedge slide 31 includes a wedge push-pull guide block 310, the front end of which is positioned within the guide slot 5-60. As the fixed base 5 reciprocates up and down along the support base 3, the wedge push-pull guide block 310 can move relative to the guide slot 5-60.

[0051] A transverse reinforcement base plate 5-7 is provided at the lower end of the fixing seat 5, and a wedge groove 500 is provided at the lower end of the wedge semi-closed groove 50. The wedge groove 500 and the transverse reinforcement base plate 5-6 constitute an end wedge semi-closed groove.

[0052] like Figure 6 As shown, the fixing base 5 adopts a horizontally centered symmetrical design, and the upper limit baffle 5-1 is a bell-mouth structure. The limit baffle 5-1 is connected to the back plate 5-3, the reinforcement plate 5-4, the connecting plate 5-5 and the guide plate 5-6 through the flange plate 5-2. This part is entirely welded from steel plate parts.

[0053] The wedge drive mechanism 2 and the lifting drive mechanism 6 preferably use oil cylinders, but may also use air cylinders or electric cylinders.

[0054] like Figure 7 As shown, a shaft boring machine provided with a vertical shifting device in the present invention comprises a boring machine rotary body 9 and a boring machine support arm 1 for supporting the boring machine rotary body 9, and a milling head 8 is provided at the lower end of the boring machine rotary body 9;

[0055] The tunnel boring machine support arms 1 are evenly distributed on the tunnel boring machine rotating body 9 in the circumferential direction; a vertical shifting device is provided on the tunnel boring machine support arms 1.

[0056] The present invention provides a vertical shifting method for a shaft boring machine, comprising providing a fixing seat 5 that can be fixed on a pipe segment 90, and setting the fixing seat 5 on a supporting seat 3 at the front end of a supporting arm 1 of the boring machine through a lifting drive device;

[0057] The driving device can push the support base 3 and the tunnel boring machine support arm 1 upward or downward relative to the fixed base 5 by applying force to the fixed base 5;

[0058] A wedge semi-enclosed groove 50 is provided on the fixing seat 5, and a self-locking wedge 4 is provided at the front end of the tunnel boring machine support arm 1; the self-locking wedge 4 can enter or leave the wedge semi-enclosed groove 50 under the action of the wedge drive mechanism;

[0059] When the self-locking wedge 4 enters the wedge semi-enclosed groove 50, the lifting drive device is self-locked;

[0060] When the self-locking wedge 4 leaves the wedge semi-enclosed groove 50, the tunnel boring machine support arm 1 can be driven to move up or down relative to the fixed seat 5 through the lifting drive device.

[0061] like Figure 1 As shown, the roadheader is in the highest vertical gear position, which is normal operation. Three support arms 1 are evenly distributed around the circumference of the roadheader. The other side of each support arm 1 is flange-connected to a support base 3. A wedge drive mechanism 2 is connected to the underside of each support arm 1. The drive rod of the wedge drive mechanism 2 is connected to a self-locking wedge 4. The self-locking wedge 4 is bolted to a guide block 41 from above.

[0062] The support base 3 is internally connected to the upper portion of the lifting drive mechanism 6, and the bottom of the lifting drive mechanism 6 directly acts on the bottom plate of the fixing frame 5. The fixing base 5 is completely fixed to the inner wall of the pipe segment 90 of the shaft.

[0063] At this time, the lifting drive mechanism 6 applies a vertical upward thrust to the support seat 3, and through its bottom plate, the self-locking wedge block 4 is tightly attached to the wedge-shaped opening of the fixing block 5, so that the support arm 1 and the fixing seat 5 are relatively fixed.

[0064] like Figure 5 As shown, when the shaft boring machine needs to change gears, the lifting drive mechanism 6 is controlled to lower to an appropriate height and then stop, so that the self-locking wedge 4 is separated from the wedge-shaped mouth of the fixed block 5, and then the wedge drive mechanism 2 is controlled to retract to the stroke, so that the self-locking wedge 4 is pulled from the side of the fixed seat 5 to the direction close to the support arm 1. At this time, the height of the lifting drive mechanism 6 can be lowered to the specified gear. After it is in place, the wedge drive mechanism 2 is controlled to push the self-locking wedge 4 to the maximum position toward the side of the fixed seat 5, and finally the lifting drive mechanism 6 is controlled to push upward until the self-locking wedge 4 is driven upward and fixed tightly with the wedge-shaped mouth of the fixed block 5. In this way, a complete vertical shift from gear 3 to gear 2 is completed.

[0065] The support arm 1 is connected to the support base 3 by a lifting drive mechanism 6 and a self-locking wedge 4 inside the support base 3, achieving a vertically tightened locking effect. The lifting drive mechanism 6 acts downward on the inner bottom plate of the fixed base 5, causing the self-locking wedge 4 to engage the wedge-shaped opening of the fixed base 5. Because the single set of self-locking wedges 4 and the fixed base 5 are in close contact horizontally, horizontal balance is ensured. This shifting device secures the entire support arm 6 to the pipe segment 90.

[0066] The present invention features smooth shifting, a simple and effective structure, and ease of maintenance. Due to the provision of the semi-enclosed wedge slot 50, the self-locking wedge 4 matches the semi-enclosed wedge slot 50, achieving self-locking between the support base 3 and the fixed base 5. This prevents the support base 3 and the tunnel boring machine support arm 1 from overtravelling when the oil cylinder within the support base 3 drives the fixed base 5. The overall self-locking structure is simple and reliable, which greatly improves the excavation and expansion effect of the shaft tunneling machine, thereby improving the construction efficiency of the shaft construction using the tunneling machine; secondly, a directional concave 5-9 is provided. When the wedge cylinder fails to drive the wedge to retract toward the main machine, if the supporting cylinder has insufficient supporting force and causes the main machine to move downward, the directional concave 5-9 can achieve a rapid supporting effect to prevent the main machine from tilting under the action of the lifting force of other cylinders; on the other hand, if the system controlling the supporting cylinder fails and all the supporting cylinders cannot work normally, the directional concave can support the entire main machine equipment; finally, with the help of the cooperation of the fixed seat and the wedge, the tunneling machine support arm 1 is self-locked, which can realize the precise positioning of the tunneling machine body and the tight cooperation of the tunneling machine and the pipe segment. The pipe wall provides the tunneling machine with a basic guarantee for the verticality of construction excavation, and the vertical excavation of the tunneling machine equipment provides a guarantee for the installation of the pipe wall.

[0067] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely intended to further illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vertical shifting device suitable for a shaft boring machine, characterized in that: It comprises a support seat (3) arranged at the front end of a tunnel boring machine support arm (1) and a fixing seat (5) for docking and fixing a pipe segment (90), wherein the fixing seat (5) can reciprocate up and down along the support seat (3); The tunnel boring machine support arm (1) is provided with a self-locking wedge (4); the fixing seat (5) is provided with a plurality of wedge semi-enclosed grooves (50) along the movement direction of the fixing seat (5); The wedge block semi-enclosed groove (50) comprises a stop lock buckle (5-8) matching the tip of the self-locking wedge block (4), a directional concave platform (5-9) arranged below the stop lock buckle (5-8), and a side baffle (5-89) connecting the stop lock buckle (5-8) and the directional concave platform (5-9); the stop lock buckle (5-8) is a notch structure cut on the guide plate (5-6), and is a hook-shaped structure that first increases and then decreases from the outside to the inside in the vertical direction, and plays a locking role in the vertical depth direction movement of the self-locking wedge block (4) just embedded therein; The fixing seat (5) is provided with a guide plate unit, and the guide plate unit includes a plurality of guide plates (5-6) arranged in parallel; the guide plates (5-6) are provided with a wedge block semi-enclosed groove (50), and a guide groove (5-60) is provided between two adjacent guide plates (5-6); The self-locking wedge (4) is provided with a guide block (41) that matches the guide groove (5-60) and can move along the guide groove (5-60); The outer structure of the self-locking wedge (4) is the same as that of the stop lock (5-8) at the top, but the vertical length is slightly smaller. This length difference allows the wedge to be in an unlocked state when the support seat at the current position moves slightly downward. The self-locking wedge (4) can enter or leave the wedge semi-enclosed groove (50) under the action of the wedge drive mechanism.

2. The vertical shifting device for a shaft boring machine according to claim 1, characterized in that: A wedge block slide (31) is provided at the lower end of the support seat (3), and the wedge block slide (31) includes a wedge block push-pull guide block (310), and the front end of the wedge block push-pull guide block (310) is arranged in the guide groove (5-60); When the fixed seat (5) reciprocates up and down along the support seat (3), the wedge block push-pull guide block (310) can move relative to the guide groove (5-60).

3. The vertical shifting device for a shaft boring machine according to claim 2, characterized in that: The wedge block slide (31) further includes a wedge block push rod limiting plate (311); a driving rod groove (312) for allowing a driving rod of the wedge block driving mechanism to pass through is provided on the wedge block push rod limiting plate (311); the driving rod groove (312) is a square groove, and the length direction of the driving rod groove (312) is parallel to the length direction of the guide groove (5-60).

4. The vertical shifting device for a shaft boring machine according to claim 1, characterized in that: The lower end of the fixing seat (5) is provided with a transverse reinforcement base plate (5-7), and the lower end of the wedge block semi-closed groove (50) is provided with a wedge block groove (500), and the wedge block groove (500) and the transverse reinforcement base plate (5-7) constitute a terminal wedge block semi-closed groove.

5. A shaft boring machine equipped with a vertical gear shifting device, characterized in that: It comprises a tunnel boring machine rotating body (9) and a tunnel boring machine support arm (1) for supporting the tunnel boring machine rotating body (9), wherein a milling head (8) is provided at the lower end of the tunnel boring machine rotating body (9); The tunnel boring machine support arm (1) is evenly distributed on the tunnel boring machine rotary body (9) in the circumferential direction; and the tunnel boring machine support arm (1) is provided with a vertical shifting device as described in any one of claims 1 to 4.

6. A vertical shifting method suitable for a shaft boring machine, characterized in that: A shaft boring machine provided with a vertical shifting device according to claim 5, wherein a fixing seat (5) fixable on the pipe segment (90) is provided, and the fixing seat (5) is set on the supporting seat (3) at the front end of the boring machine support arm (1) through a lifting drive mechanism; The lifting drive mechanism applies force to the fixed seat (5) to push the support seat (3) and the tunnel boring machine support arm (1) upward or downward relative to the fixed seat (5); A wedge block semi-enclosed groove (50) is provided on the fixing seat (5), and a self-locking wedge block (4) is provided at the front end of the tunnel boring machine support arm (1); the self-locking wedge block (4) can enter or leave the wedge block semi-enclosed groove (50) under the action of a wedge block driving mechanism; When the self-locking wedge (4) enters the wedge semi-enclosed groove (50), the lifting drive mechanism is self-locked; When the self-locking wedge (4) leaves the wedge semi-enclosed groove (50), the tunnel boring machine support arm (1) can be driven to move upward or downward relative to the fixed seat (5) by the lifting drive mechanism.

Images