Disassembling method for center block of ultra-large-diameter normal-pressure cutterhead

Abstract

The invention discloses a method for disassembling a center block of a super-large-diameter normal-pressure cutterhead. The method comprises the following steps that S1, the cutterhead is fixed to a tunnel; s2, a detachable cutter on the cutter head is detached, and a side block above a center block of the cutter head is detached; s3, a supporting frame is fixedly installed in the tunnel; s4, the cutterhead center block is separated from the remaining side blocks, and the gravity load of the cutterhead center block is transmitted to the first translation guide rail through the bearing device; s5, horizontally moving the cutterhead center block to an overturning position; s6, the cutterhead center block is overturned to be in a horizontal state; and S7, the cutterhead center block is horizontally moved to a designated position. The method comprises the steps that S1, the cutter head is fixed to a tunnel, a stable foundation is provided for follow-up operation, and potential safety hazards caused by shaking of the cutter head in the disassembling process are avoided; under the condition of not expanding an excavated cavity, a stable supporting and moving track can be provided for the center block, and the existing tunnel space is fully utilized for disassembling operation.

Description

Technical Field

[0001] The invention relates to the technical field of super-large diameter shield machines, and in particular to a method for disassembling a central block of a super-large diameter normal pressure cutter head. Background Art

[0002] Ultra-large diameter atmospheric pressure shields are increasingly used in urban tunnel projects such as crossing rivers and seas. In some projects, after completing the tunnel excavation task, the equipment needs to be disassembled in situ. As a key component of shield excavation of rock and soil, the atmospheric pressure cutterhead is located at the front end of the equipment. It is a large steel structure with a large weight and volume. In addition, since the cutterhead is close to the tunnel contour and the space is very limited, it is difficult to disassemble and transfer the cutterhead without expanding the cavern. Expanding the cavern not only affects the tunnel contour size, but also greatly reduces the construction efficiency and increases the construction cost. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for disassembling a center block of an ultra-large diameter atmospheric pressure cutter disc.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A method for disassembling a center block of an ultra-large diameter normal pressure cutter disc comprises the following steps: S1, fixing the cutter disc to a tunnel; S2, removing a detachable cutter on the cutter disc and removing a side block above the center block of the cutter disc; S3, fixing a support frame in the tunnel; installing a receiving device at a supporting point of the center block of the cutter disc, wherein the support frame is provided with a first translation guide rail below the receiving device; S4, separating the center block of the cutter disc from the remaining side blocks, releasing the fixation of the cutter disc to the tunnel, and transmitting the gravity load of the center block of the cutter disc to the first translation guide rail through the receiving device; S5, horizontally moving the center block of the cutter disc to a flipping position; S6, flipping the center block of the cutter disc to a horizontal state; S7, horizontally moving the center block of the cutter disc to a designated position.

[0006] Further, step S5 specifically includes: S51, installing a first hydraulic cylinder on the top of the cutter head center block, the cylinder body of the first hydraulic cylinder is connected to the end wall of the tunnel, and the telescopic push rod of the first hydraulic cylinder is connected to the cutter head center block; installing a second hydraulic cylinder at the bottom of the cutter head center block; the second hydraulic cylinder is horizontally arranged and one end is connected to the bottom of the cutter head center block, and the other end is connected to the support frame; the initial state of the first hydraulic cylinder is a retracted state, the initial state of the second hydraulic cylinder is an extended state, and the telescopic activity stroke of the first hydraulic cylinder is smaller than the telescopic activity stroke of the second hydraulic cylinder; S52, the first hydraulic cylinder The first hydraulic cylinder changes to an extended state, and the second hydraulic cylinder changes to a retracted state to drive the center block of the cutter disc to move; and when the first hydraulic cylinder switches to the extended state, the second hydraulic cylinder stops retracting; S53, determines whether the center block of the cutter disc has reached the flipping position: if so, proceeds to step S6; if not, proceeds to step S54; S54, disconnects the cylinder body of the first hydraulic cylinder from the end wall of the tunnel, switches the first hydraulic cylinder to a retracted state, and installs a support rod between the cylinder body of the first hydraulic cylinder and the end wall of the tunnel; S55, returns to step S52 until the center block of the cutter disc moves horizontally to the flipping position.

[0007] Furthermore, step S6 specifically includes: S61, the hinged ear on the center block of the cutter disc in the flipped position is aligned with the hinged seat of the support frame, and the hinge shaft is installed; S62, the second hydraulic cylinder is disconnected from the bottom of the center block of the cutter disc, and the second hydraulic cylinder is hinged to the top of the center block of the cutter disc; S63, the first hydraulic cylinder is removed, the second hydraulic cylinder is contracted to a contracted state and drives the center block of the cutter disc to rotate to an inclined state along the hinged seat; S64, the third hydraulic cylinder is installed, one end of the third hydraulic cylinder is hinged to the support frame, and the other end is hinged to the center block of the cutter disc; and the hinged position of the third hydraulic cylinder and the support frame is lower than the first translation guide rail and the connection position of the second hydraulic cylinder and the support frame; S65, a slidable sliding receiving seat is placed on the first translation guide rail or a sliding receiving seat is installed on the side of the center block of the cutter disc facing the first translation guide rail, and the second hydraulic cylinder is removed; S66, the third hydraulic cylinder contracts to drive the center block of the cutter disc to rotate to a horizontal state, and the gravity load of the center block of the cutter disc is transmitted to the first translation guide rail through the sliding receiving seat.

[0008] Further, step S7 specifically includes: releasing the hinge between the hinge ear and the hinge seat, pulling the sliding receiving seat or the center block of the cutter disc, so that the sliding receiving seat moves along the first translation guide rail, thereby driving the center block of the cutter disc to move to a specified position.

[0009] Furthermore, a roller is provided at the bottom of the sliding receiving seat for rolling along the first translation guide rail.

[0010] Furthermore, the third hydraulic cylinders are provided in two groups and are symmetrically arranged on both sides of the second hydraulic cylinder.

[0011] Furthermore, step S1 specifically includes: inserting a pad at the bottom of the cutter head to transfer the gravity load of the cutter head to the bottom wall of the tunnel, and piercing the cutter head with an anchor rod, which is inserted into the end wall of the tunnel.

[0012] Furthermore, the fixed installation of the support frame in the tunnel specifically includes: the support legs of the support frame are fixed to the bottom wall of the tunnel, and one end of the first translation guide rail of the support frame is embedded in the end wall of the tunnel.

[0013] Furthermore, a diagonal bracing reinforcement rod is provided between adjacent supporting legs or between the first translation guide rail and the supporting leg.

[0014] Furthermore, the receiving device is provided with a roller capable of moving along the first translation guide rail.

[0015] The present invention has the following beneficial effects:

[0016] Step S1 fixes the cutter disc to the tunnel to provide a stable foundation for subsequent operations and avoid safety hazards caused by the shaking of the cutter disc during the disassembly process; Step S2 removes the detachable cutter on the cutter disc and the side blocks above the center block of the cutter disc, reducing the weight and occupied space of the overall structure of the cutter disc, creating conditions for the separation of the center block of the cutter disc without expanding the cavern. Step S3 fixes the support frame in the tunnel and installs a receiving device at the support point of the center block of the cutter disc, and sets a first translation guide rail at the bottom, so that without expanding the cavern, it can provide a stable support and moving track for the center block, and make full use of the existing tunnel space for disassembly operations; Step S4 separates the center block of the cutter disc from the remaining side blocks and transmits its gravity load to the first translation guide rail through the receiving device, thereby releasing the fixation of the cutter disc and the tunnel.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0020] Figure 2 is a specific flow chart of step S5 of the present invention;

[0021] Figure 3 is a specific flow chart of step S6 of the present invention;

[0022] Figure 4It is a schematic diagram of the position of the cutterhead and the tunnel of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the cutter disc;

[0024] Figure 6 It is a schematic diagram of one state during the construction of the present invention;

[0025] Figure 7 It is a schematic diagram of one state during the construction of the present invention;

[0026] Figure 8 It is a schematic diagram of one state during the construction of the present invention;

[0027] Fig. 9 It is a schematic diagram of one state during the construction of the present invention;

[0028] Fig.10 It is a schematic diagram of one state during the construction of the present invention.

[0029] Legend:

[0030] Cutter disc 100, end wall 101, cutter disc center block 110, receiving device 111, hinged ear 112, side block 120;

[0031] Support frame 200, first translation guide rail 210, hinge seat 220, support leg 230, sliding support seat 240, first hydraulic diagonal support reinforcement rod 250, second translation guide rail 260;

[0032] A first hydraulic cylinder 300, a second hydraulic cylinder 310, and a support rod 320;

[0033] The third hydraulic cylinder 400 . DETAILED DESCRIPTION

[0034] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0035] 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.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] Please refer to Figure 1 A method for disassembling a center block of an ultra-large diameter normal pressure cutter disc in a preferred embodiment of the present invention comprises steps S1, S2, S3, S4, S5, S6 and S7.

[0039] S1, fix the cutter head 100 to the tunnel; the fixing operation of step S1 ensures the safety of the subsequent steps and prevents the cutter head from accidentally moving during the disassembly process and causing danger.

[0040] S2, remove the detachable tool on the cutter disc 100, and remove the side block 120 above the cutter disc center block 110; the removal of the tool and side block in step S2 clears the obstacles for the subsequent processing of the center block, and improves the convenience and efficiency of the operation.

[0041] S3, a support frame 200 is fixedly installed in the tunnel; a receiving device 111 is installed at the supporting point of the cutter head center block 110, and a first translation guide rail 210 is arranged below the receiving device 111 of the support frame 200; the arrangement of the support frame 200, the receiving device 111 and the first translation guide rail 210 in step S3 provides a reliable guarantee for the movement of the center block, ensuring that the center block will not accidentally fall or be damaged during the movement. Figure 3 As shown, the bottom of the support frame 200 is fixed to the bottom wall of the tunnel, and the first translation guide rail 210 has a certain distance from the bottom wall of the tunnel. The installation of the support frame 200 does not require the expansion of the tunnel, and the existing tunnel is completely utilized for layout.

[0042] S4, separate the cutter disc center block 110 from the remaining side blocks 120, release the fixation of the cutter disc 100 and the tunnel, and transfer the gravity load of the cutter disc center block 110 to the first translation guide rail 210 through the receiving device 111. The separation and gravity load transfer operation of step S4 enables the cutter disc center block 110 to be smoothly separated from the cutter disc as a whole, and prepare for subsequent movement through a reasonable gravity transfer method. The gravity at the lower end of the cutter disc center block 110 cannot be transferred to the tunnel bottom wall through the side blocks 120, and the bottom of the cutter disc center block 110 can be considered to be in a suspended state relative to the tunnel bottom wall. The separation of the cutter disc center block 110 from the side blocks 120 also prevents the side blocks 120 from interfering with the movement of the cutter disc center block 110, and the remaining side blocks 120 can be removed at the end.

[0043] S5, move the cutter disc center block 110 horizontally to the flipping position; move the cutter disc center block 110 horizontally to the flipping position, and use the first translation guide rail 210 to achieve precise position adjustment to create conditions for the flipping operation.

[0044] S6, flip the cutter head center block 110 to a horizontal state; further change the posture of the center block to make it more convenient for subsequent processing and transportation.

[0045] S7, move the cutter disc center block 110 horizontally to the specified position. The specified position may be the end position of the first translation guide rail 210, or the starting position of the subsequent receiving and conveying mechanism. The specified position may be determined by setting the translation distance after the cutter disc center block 110 is flipped to a horizontal state. For example, the cutter disc center block 110 may reach the specified position by a preset translation distance after being flipped to a horizontal state. The preset distance may be set according to actual conditions.

[0046] like Figure 4 and Figure 5As shown, since the cutter disc 100 is close to the tunnel contour and the space is very limited, it is difficult to directly transfer the cutter disc 100 as a whole without expanding the cavern. Expanding the cavern not only affects the tunnel contour size, but also greatly reduces the construction efficiency and increases the construction cost. A method for disassembling the center block of an ultra-large diameter normal pressure cutter disc in a preferred embodiment of the present invention, step S1 fixes the cutter disc 100 to the tunnel to provide a stable foundation for subsequent operations and avoid safety hazards caused by the shaking of the cutter disc during the disassembly process; step S2 removes the detachable cutter on the cutter disc and the side block 120 above the cutter disc center block 110, reducing the weight and occupied space of the overall structure of the cutter disc, creating conditions for the separation of the cutter disc center block 110 without expanding the cavern. Step S3: fix the support frame 200 in the tunnel and install the receiving device 111 at the supporting point of the cutter disc center block 110, and set the first translation guide rail 210 at the bottom, so that without expanding the cavern, it can provide stable support and moving track for the center block, and make full use of the existing tunnel space for disassembly operation; Step S4: separate the cutter disc center block 110 from the remaining side blocks 120 and transfer its gravity load to the first translation guide rail 210 through the receiving device 111. The disassembly and transfer of the cutter disc center block can be completed in a limited space, and the disassembly task can be completed without relying on the expansion of the cavern, which greatly reduces the construction time and cost. Each step takes into account the feasibility and convenience of actual operation, improves the flexibility of construction, makes the construction process more efficient and safe, and also reduces the construction cost and improves the overall benefit of the project.

[0047] Reference Figure 2 In some embodiments of the present invention, step S5 specifically includes S51, S52, S53, S54 and S55.

[0048] S51, such as Figure 6As shown, a first hydraulic cylinder 300 is installed on the top of the cutter disc center block 110, the cylinder body of the first hydraulic cylinder 300 is connected to the end wall 101 of the tunnel, and the telescopic push rod of the first hydraulic cylinder 300 is connected to the cutter disc center block 110; specifically, the cylinder body of the first hydraulic cylinder 300 is hinged to a base, the base is fixed to the end wall 101 of the tunnel, and the telescopic push rod is also hinged to the cutter disc center block 110, so that the structures have active adaptive capabilities to avoid damage during the activity due to rigid connection. It can be understood that in order to facilitate the connection of the hydraulic cylinder body, the cutter disc center block 110 can be temporarily fixed with a connecting seat for the telescopic push rod of the first hydraulic cylinder 300 to connect. The first hydraulic cylinder 300 is arranged horizontally as a whole, so as to push the cutter disc center block 110 horizontally. A second hydraulic cylinder 310 is installed at the bottom of the cutter disc center block 110. Specifically, a hinge seat is provided at the bottom of the cutter disc center block 110 for hinged one end of the second hydraulic cylinder 310, and the hinge seat can be disassembled after completing the corresponding function. The second hydraulic cylinder 310 also includes a cylinder body and a telescopic push rod. The cylinder body can drive the telescopic push rod to telescope. The cylinder body is hinged on the support frame 200, and the telescopic push rod is hinged on the cutter disc center block 110. Since there is originally a side block 120 at the bottom of the cutter disc center block 110, the second hydraulic cylinder 310 has a certain height from the bottom wall of the tunnel, and the height of the second hydraulic cylinder 310 corresponds to the height of the bottom of the cutter disc center block 110. The second hydraulic cylinder 310 is horizontally arranged and one end is connected to the bottom of the cutter disc center block 110, and the other end is connected to the support frame 200; the initial state of the first hydraulic cylinder 300 is a retracted state, and the initial state of the second hydraulic cylinder 310 is an extended state, and the telescopic activity stroke of the first hydraulic cylinder 300 is smaller than the telescopic activity stroke of the second hydraulic cylinder 310, such as Figure 6 As shown, in the initial disassembly state, the first hydraulic cylinder 300 is located between the cutter head center block 110 and the end wall 101 of the tunnel, and the space is narrow, so a hydraulic cylinder with a large length or a long telescopic travel cannot be placed. The second hydraulic cylinder 310 is not subject to this limitation, so a longer travel can be set to adapt to a larger moving distance of the cutter head center block 110.

[0049] S52, the first hydraulic cylinder 300 changes to the extended state, and the second hydraulic cylinder 310 changes to the retracted state, so as to drive the cutter head center block 110 to move, so that the cutter head center block 110 is away from the end wall 101 of the tunnel; and when the first hydraulic cylinder 300 is switched to the extended state, the second hydraulic cylinder 310 stops retracting, that is, the telescopic push rod of the first hydraulic cylinder 300 has reached the maximum extension stroke. Usually, in order to facilitate the control of the cutter head center block 110 from the initial position to the flip position, at least one extension stroke of the first hydraulic cylinder 300 needs to be moved. That is, the distance from the initial position to the flip position of the cutter head center block 110 will be greater than or equal to the extension stroke of the first hydraulic cylinder 300, which can be determined according to whether there is enough space to arrange the first hydraulic cylinder 300.

[0050] S53, determine whether the cutter disc center block 110 has reached the flipping position: if so, proceed to step S6, indicating that it has reached the flipping position and subsequent flipping operations can be performed; if not, proceed to step S54.

[0051] S54, the cylinder body of the first hydraulic cylinder 300 is disconnected from the end wall 101 of the tunnel, that is, the cylinder body is separated from the end wall 101 of the tunnel. When a support rod 320 is connected between the cylinder body and the end wall 101 of the tunnel, the connection between the support rod 320 and the end wall 101 of the tunnel can be disconnected, or the connection between the support rod 320 and the cylinder body can be disconnected, thereby disconnecting the cylinder body from the end wall 101 of the tunnel. Subsequently, the first hydraulic cylinder 300 is switched to a retracted state, and a support rod 320 is added between the cylinder body of the first hydraulic cylinder 300 and the end wall 101 of the tunnel. When a support rod 320 already exists, the added support rod 320 is connected in series with the existing support rod 320. One end of the support rod 320 is fixedly connected to the end wall 101 of the tunnel, and the other end is connected to the cylinder body. Of course, the connection between the support rod 320 and the end wall 101 of the tunnel can be a direct connection or an indirect connection through other support rods 320. Similarly, the connection between the support rod 320 and the cylinder body can be a direct connection or an indirect connection through other support rods 320. The first hydraulic cylinder 300 is padded by the support rod 320 so that it can extend to continue to push the cutter head center block 110 to move.

[0052] S55, return to step S52, and re-drive the first hydraulic cylinder 300 and the second hydraulic cylinder 310 to push the cutter head center block 110 to move horizontally until the cutter head center block 110 moves horizontally to the flip position, reaching Figure 7 Status shown.

[0053] Reference Figure 3 In some embodiments of the present invention, step S6 specifically includes steps S61, S62, S63, S64, S65 and S66.

[0054] S61, the hinge ear 112 on the center block 110 of the cutter disc in the flipped position is aligned with the hinge seat 220 on the support frame 200, and the hinge shaft is installed to achieve hinge connection, so that the center block 110 of the cutter disc can rotate around the hinge shaft.

[0055] S62, disconnect the second hydraulic cylinder 310 from the bottom of the cutter disc center block 110, and hinge the second hydraulic cylinder 310 to the top of the cutter disc center block 110. A hinge seat for hinge one end of the second hydraulic cylinder 310 is installed on the top of the cutter disc center block 110, and the hinge seat can be disassembled after completing the corresponding function.

[0056] S63, remove the first hydraulic cylinder 300, and after the second hydraulic cylinder 310 is reconnected with the cutter head center block 110, remove the first hydraulic cylinder 300, so as to avoid the cutter head center block 110 from being unstable and overturning during the process of the second hydraulic cylinder 310 being reconnected with the cutter head center block 110, thereby preventing the cutter head center block 110 from being unstable and overturning, thereby preventing the cutter head center block 110 from being dangerous. The second hydraulic cylinder 310 is retracted to a retracted state and drives the cutter head center block 110 to rotate along the articulated seat 220 to an inclined state, so as to achieve the following Figure 8 The state shown; since the second hydraulic cylinder 310 needs to pull the bottom of the cutter disc center block 110 to translate in step S5, the height of the connection position between the second hydraulic cylinder 310 and the support frame 200 is at the same height as the bottom of the cutter disc center block 110, and the cylinder body of the second hydraulic cylinder 310 itself has a certain length, it is impossible for the second hydraulic cylinder 310 to directly flip the cutter disc center block 110 to a horizontal state.

[0057] S64, install the third hydraulic cylinder 400, one end of the third hydraulic cylinder 400 is hinged to the support frame 200, and the other end is hinged to the cutter head center block 110. Fig. 9 As shown, the hinge position of the third hydraulic cylinder 400 and the support frame 200 is lower than the connection position of the first translation guide rail 210 and the second hydraulic cylinder 310 and the support frame 200, so that the cutter disc center block 110 can be flipped to a horizontal state and located on the first translation guide rail 210.

[0058] S65, place a slidable sliding socket 240 on the first translation guide rail 210 or install the sliding socket 240 on the side of the cutter disc center block 110 facing the first translation guide rail 210, and then remove the second hydraulic cylinder 310. After installing the third hydraulic cylinder 400 and the sliding socket 240, remove the second hydraulic cylinder 310, so as to achieve stable support for the inclined cutter disc center block 110 and improve construction safety.

[0059] S66, the third hydraulic cylinder 400 contracts and drives the cutter head center block 110 to rotate to a horizontal state, and the gravity load of the cutter head center block 110 is transmitted to the first translation guide rail 210 through the sliding receiving seat 240, reaching Fig.10 Status shown.

[0060] In some implementations of the present invention, step S7 specifically includes:

[0061] The hinge between the hinge ear 112 and the hinge seat 220 is released, and the hinge shaft is removed, and then the third hydraulic cylinder 400 is removed, and the sliding receiving seat 240 or the cutter head center block 110 is pulled, so that the sliding receiving seat 240 moves along the first translation guide rail 210, thereby driving the cutter head center block 110 to move to a specified position. Specifically, the sliding receiving seat 240 or the cutter head center block 110 can be pulled by a winch.

[0062] Reference Fig.10 In some embodiments of the present invention, a roller is provided at the bottom of the sliding receiving seat 240 to roll along the first translation guide rail 210, thereby reducing translation resistance.

[0063] Reference Fig. 9 In some embodiments of the present invention, two groups of third hydraulic cylinders 400 are provided and symmetrically arranged on both sides of the second hydraulic cylinder 310, so as to achieve stable support and force balance.

[0064] In some embodiments of the present invention, step S1 specifically includes: inserting a pad at the bottom of the cutter head 100 so that the gravity load of the cutter head 100 is transferred to the bottom wall of the tunnel, and an anchor rod is pierced through the cutter head 100, and the anchor rod is inserted into the end wall 101 of the tunnel. When the cutter head center block 110 needs to be moved, the anchor rod can be removed, thereby ensuring the initial fixation of the cutter head 100 and ensuring the stability of subsequent construction.

[0065] In some embodiments of the present invention, a support frame 200 is fixedly installed in a tunnel, specifically including: a support leg 230 of the support frame 200 is fixed to the bottom wall of the tunnel, one end of a first translation guide rail 210 of the support frame 200 is embedded in an end wall 101 of the tunnel and can be reinforced with concrete, thereby achieving stable support of the support frame 200 and installation stability of the first translation guide rail 210, providing a stable foundation for the subsequent movement of the cutter head center block 110.

[0066] In some embodiments of the present invention, diagonal reinforcement rods 250 are provided between adjacent support legs 230 or between the first translation guide rail 210 and the support legs 230 , thereby enhancing the overall structural stability of the support frame 200 .

[0067] In some embodiments of the present invention, a roller that can move along the first translation guide rail 210 is provided at the bottom of the receiving device 111, thereby reducing the resistance to the movement of the cutter head center block 110. In addition, it can be understood that since the cutter head center block 110 is upright during the initial movement, in order to improve the movement stability, a second translation guide rail 260 can be provided, and the cutter head center block 110 is also provided with a receiving device 111 corresponding to the second translation guide rail 260, thereby realizing multi-position support.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for disassembling the center block of an ultra-large diameter atmospheric pressure cutter disc, characterized in that: The steps include: S1, fixing the cutterhead (100) in the tunnel; S2, removing the detachable cutter on the cutter disc (100), and removing the side block (120) above the cutter disc center block (110); S3, a support frame (200) is fixedly installed in the tunnel; a receiving device (111) is installed at the supporting point of the cutter head center block (110), and the support frame (200) is provided with a first translation guide rail (210) below the receiving device (111); S4, separating the cutter head center block (110) from the remaining side blocks (120), releasing the fixation between the cutter head (100) and the tunnel, and transferring the gravity load of the cutter head center block (110) to the first translation guide rail (210) through the receiving device (111); S5, moving the cutter head center block (110) horizontally to a flipping position; S6, turning the cutter head center block (110) to a horizontal state; S7, moving the cutter head center block (110) horizontally to a designated position.

2. The method for disassembling the center block of the super-large diameter atmospheric pressure cutter disc according to claim 1 is characterized in that: Step S5 specifically includes: S51, a first hydraulic cylinder (300) is installed on the top of the cutter disc center block (110), the cylinder body of the first hydraulic cylinder (300) is connected to the end wall (101) of the tunnel, and the telescopic push rod of the first hydraulic cylinder (300) is connected to the cutter disc center block (110); a second hydraulic cylinder (310) is installed at the bottom of the cutter disc center block (110); the second hydraulic cylinder (310) is arranged horizontally, one end of the second hydraulic cylinder (310) is connected to the bottom of the cutter disc center block (110), and the other end is connected to the support frame (200); the initial state of the first hydraulic cylinder (300) is a retracted state, the initial state of the second hydraulic cylinder (310) is an extended state, and the telescopic activity stroke of the first hydraulic cylinder (300) is smaller than the telescopic activity stroke of the second hydraulic cylinder (310); S52, the first hydraulic cylinder (300) changes to an extended state, and the second hydraulic cylinder (310) changes to a retracted state, so as to drive the cutter head center block (110) to move; and when the first hydraulic cylinder (300) switches to the extended state, the second hydraulic cylinder (310) stops retracting; S53, judging whether the cutter disc center block (110) has reached the flipping position: If yes, go to step S6; if no, go to step S54; S54, disconnecting the cylinder body of the first hydraulic cylinder (300) from the end wall of the tunnel, switching the first hydraulic cylinder (300) to a retracted state, and installing a support rod (320) between the cylinder body of the first hydraulic cylinder (300) and the end wall (101) of the tunnel; S55, return to step S52, until the cutter head center block (110) moves horizontally to the flip position.

3. The method for disassembling the center block of the super-large diameter atmospheric pressure cutter disc according to claim 2 is characterized in that: Step S6 specifically includes: S61, aligning the hinge ear (112) on the center block (110) of the cutter head in the flipped position with the hinge seat (220) of the support frame (200), and inserting the hinge shaft; S62, disconnecting the second hydraulic cylinder (310) from the bottom of the cutter head center block (110), and hinge-connecting the second hydraulic cylinder (310) to the top of the cutter head center block (110); S63, the first hydraulic cylinder (300) is removed, and the second hydraulic cylinder (310) is retracted to a retracted state and drives the cutter head center block (110) to rotate along the hinge seat (220) to an inclined state; S64, installing a third hydraulic cylinder (400), wherein one end of the third hydraulic cylinder (400) is hinged to the support frame (200), and the other end is hinged to the cutter disc center block (110); and the hinge position of the third hydraulic cylinder (400) and the support frame (200) is lower than the connection position of the first translation guide rail (210) and the second hydraulic cylinder (310) and the support frame (200); S65, placing a slidable sliding receiving seat (240) on the first translation guide rail (210) or installing the sliding receiving seat (240) on the side of the cutter head center block (110) facing the first translation guide rail (210), and removing the second hydraulic cylinder (310); S66, the third hydraulic cylinder (400) contracts to drive the cutter disc center block (110) to rotate to a horizontal state, and the gravity load of the cutter disc center block (110) is transmitted to the first translation guide rail (210) through the sliding receiving seat (240).

4. The method for disassembling the center block of the super-large diameter atmospheric pressure cutter disc according to claim 3 is characterized in that: Step S7 specifically includes: The hinge between the hinge ear (112) and the hinge seat (220) is released, and the sliding receiving seat (240) or the cutter disc center block (110) is pulled, so that the sliding receiving seat (240) moves along the first translation guide rail (210), thereby driving the cutter disc center block (110) to move to a specified position.

5. The method for disassembling the center block of the super-large diameter atmospheric pressure cutter disc according to claim 4 is characterized in that: The bottom of the sliding receiving seat (240) is provided with a roller for rolling along the first translation guide rail (210).

6. The method for disassembling the center block of the super-large diameter atmospheric pressure cutter disc according to claim 3 is characterized in that: The third hydraulic cylinders (400) are provided in two groups and are symmetrically arranged on both sides of the second hydraulic cylinder (310).

7. The method for disassembling the center block of an ultra-large diameter atmospheric pressure cutter disc according to claim 1, characterized in that: Step S1 specifically includes: A cushion block is inserted at the bottom of the cutter disc (100) so that the gravity load of the cutter disc (100) is transferred to the bottom wall of the tunnel. An anchor rod is provided on the cutter disc (100) and is inserted into the end wall (101) of the tunnel.

8. The method for disassembling the center block of an ultra-large diameter atmospheric pressure cutter disc according to claim 1, characterized in that: The method of fixing and installing the support frame (200) in the tunnel specifically comprises: the support leg (230) of the support frame (200) is fixed to the bottom wall of the tunnel, and one end of the first translation guide rail (210) of the support frame (200) is embedded in the end wall (101) of the tunnel.

9. The method for disassembling the center block of the super-large diameter atmospheric pressure cutter disc according to claim 8, characterized in that: A diagonal support reinforcing rod (250) is provided between adjacent support legs (230) or between the first translation guide rail (210) and the support leg (230).

10. The method for disassembling the center block of an ultra-large diameter atmospheric pressure cutter disc according to claim 1, characterized in that: The receiving device (111) is provided with a roller capable of moving along the first translation guide rail (210).

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