An operating method for an assembled bearing structure of a shield machine propulsion hydraulic cylinder

Abstract

The present invention discloses an operating method of an assembled bearing structure of a shield machine propulsion hydraulic cylinder, wherein the assembled bearing structure comprises a middle shield shell, a rear shield shell, a bearing structure 1 and a bearing structure 2, wherein the bearing structure 1 is arranged on the middle shield shell, the bearing structure 2 is arranged on the rear shield shell, the bearing structure 1 and the bearing structure 2 are arranged correspondingly front and back, and the propulsion hydraulic cylinder is arranged on the bearing structure 1 and the bearing structure 2, and is detachably connected to the bearing structure 1 and the bearing structure 2. The present invention adopts an assembled bearing structure to carry the propulsion hydraulic cylinder, thereby ensuring stable and safe bearing of the propulsion hydraulic cylinder. During disassembly and assembly, the propulsion hydraulic cylinder is directly lifted and lowered and translated, and there is no need to first axially move the propulsion hydraulic cylinder and then perform the lifting and lowering operation, which not only reduces the difficulty of disassembly and assembly of the propulsion hydraulic cylinder, but also greatly improves the disassembly and assembly efficiency of the propulsion hydraulic cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine construction, and in particular to an operating method of an assembled bearing structure of a shield machine propulsion hydraulic cylinder. Background Art

[0002] The shield method refers to a method of constructing underground space by using the cutterhead and tools at the front end of the shield machine to excavate rock and soil, assembling prefabricated segments under the protection of the shield shell and providing reaction force for the propulsion hydraulic cylinder, and advancing in a serpentine manner in the stratum.

[0003] With the vigorous development of rail transit projects in my country, shield construction has become more and more perfect, and the frequency of tunnels crossing rivers, seas and lakes is increasing. Under large spans, short construction periods and complex geological conditions, the "in-tunnel shell disintegration" technology has become a new development trend.

[0004] When the shield machine adopts the "in-hole shell dismantling" technology, the shield machine propulsion hydraulic cylinder needs to be removed from the shield shell for reuse. In the prior art, CN105108468B discloses a dismantling device and a corresponding dismantling method for dismantling the propulsion hydraulic cylinder, and CN111775099B also discloses a method for dismantling the shield machine propulsion cylinder in a tunnel. The above two dismantling methods are applied to fixedly installed shield machine propulsion cylinders. The specific operation method is to first use the dismantling equipment to connect with the shield machine propulsion cylinder, and then drive the shield machine propulsion cylinder to translate along the axis. After the shield machine propulsion cylinder is completely translated and dragged out, the shield machine propulsion cylinder is re-fixed and lifted, and then the shield machine propulsion cylinder is lowered and transferred. When the fixed-installed shield machine propulsion cylinder adopts the above-mentioned dismantling method, there are problems such as cumbersome operation and low efficiency. In addition, the space of the shield tunnel is relatively small, which further aggravates the difficulty of dismantling the shield machine propulsion cylinder. In addition, since the shield machine propulsion cylinder requires a large space for translation and dragging, a large working space is required for operation, which makes the dismantling process of the shield machine propulsion cylinder relatively fixed and cannot be changed according to construction requirements, making the entire dismantling period long and the flexibility poor. The present invention provides an operating method of an assembled bearing structure of a shield machine propulsion hydraulic cylinder to solve the above problems. Summary of the invention

[0005] The present invention provides an operating method for an assembled bearing structure of a shield machine propulsion hydraulic cylinder. The assembled bearing structure is used to bear the propulsion hydraulic cylinder of the shield machine. On the basis of ensuring stable bearing of the propulsion hydraulic cylinder, the disassembly operation efficiency of the propulsion hydraulic cylinder is greatly improved.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A prefabricated bearing structure for a thrust hydraulic cylinder of a shield machine, used for bearing the thrust hydraulic cylinder of the shield machine, wherein the thrust hydraulic cylinder is arranged at intervals on a middle shield of the shield machine, and comprises a middle shield shell, a tail shield shell, a bearing structure 1 and a bearing structure 2, wherein the bearing structure 1 is arranged on the middle shield shell, the bearing structure 2 is arranged on the tail shield shell, the bearing structure 1 and the bearing structure 2 are arranged correspondingly front and back, and the thrust hydraulic cylinder is arranged on the bearing structure 1 and the bearing structure 2, and is detachably connected to the bearing structure 1 and the bearing structure 2.

[0008] Furthermore, the bearing structure one and the bearing structure two both include a fixed bearing plate and a movable bearing plate, the fixed bearing plate of the bearing structure one is fixedly connected to the middle shield shell, the fixed bearing plate of the bearing structure two is fixedly connected to the tail shield shell, and the movable bearing plate is detachably connected to the fixed bearing plate.

[0009] Furthermore, the fixed bearing plate includes a mounting plate and a fixing groove, the mounting plate is fixedly connected to the middle shield shell and the tail shield shell, the fixing groove is fixedly connected to the mounting plate, the fixing groove opening is arranged inwardly, and the movable bearing plate is located in the fixing groove.

[0010] Furthermore, both the fixed bearing plate and the movable bearing plate are provided with a slot, and the slot on the fixed bearing plate and the slot on the movable bearing plate are arranged relative to each other to form a circular bayonet, and the propulsion hydraulic cylinder is located in the circular bayonet.

[0011] Furthermore, the movable bearing plate is detachably connected to the fixed bearing plate via connecting bolts.

[0012] An operating method of an assembled bearing structure of a shield machine propulsion hydraulic cylinder comprises the following steps:

[0013] S1, component prefabrication: make fixed bearing plates and movable bearing plates according to the drawings, and pre-install the fixed bearing plates on the shield shell of the shield machine;

[0014] S2, lifting of the propulsion hydraulic cylinder: after the shield machine is ready for lowering into the well, the propulsion hydraulic cylinder to be installed is moved to the shield shell by the installation vehicle, and then the installation vehicle is raised to lift the propulsion hydraulic cylinder upward to the installation height and keep the lifting state, and the propulsion hydraulic cylinder is connected to the middle shield, and the propulsion hydraulic cylinder is located in the slot of the fixed bearing plate;

[0015] S3, fix the propulsion hydraulic cylinder: keep the propulsion hydraulic cylinder in the lifted state, dock the movable bearing plate with the fixed bearing plate, and connect and lock them with the connecting bolts. After the movable bearing plate is locked, drop the installation vehicle, release the lifting of the propulsion hydraulic cylinder by the installation vehicle, and support and fix the propulsion hydraulic cylinder with the bearing structure 1 and the bearing structure 2;

[0016] S4, shield machine construction: assembly, commissioning and excavation of the shield machine;

[0017] S5, dismantling of the shield machine: dismantling the shield machine shell, and after the shield machine is ready to dismantle the hydraulic cylinder, the installation vehicle is hoisted underground;

[0018] S6, lifting by the propulsion hydraulic cylinder: the installation vehicle is lifted until it contacts the cylinder body of the propulsion hydraulic cylinder, and then the lifting height of the installation vehicle is adjusted until the weight of the propulsion hydraulic cylinder is completely borne by the installation vehicle, the installation vehicle is kept lifted, and then the movable bearing plate is removed from the fixed bearing plate, so that the propulsion hydraulic cylinder falls completely on the installation vehicle;

[0019] S7, disassembly of the propulsion hydraulic cylinder: control the installation vehicle to descend, and when the installation vehicle descends, the propulsion hydraulic cylinder is driven to descend together until the propulsion hydraulic cylinder is lowered into place, and then the propulsion hydraulic cylinder is transferred and lifted out of the ground.

[0020] The beneficial effects of the present invention are as follows:

[0021] The propulsion hydraulic cylinder is supported by an assembled bearing structure, which ensures stable and safe support of the propulsion hydraulic cylinder. When disassembling and assembling, the propulsion hydraulic cylinder can be directly lifted and lowered. There is no need to first move the propulsion hydraulic cylinder axially and then lift and lower it. This reduces the difficulty of disassembling and assembling the propulsion hydraulic cylinder and greatly improves the efficiency of disassembling and assembling the propulsion hydraulic cylinder.

[0022] When the propulsion hydraulic cylinder is moved axially, the center of gravity of the propulsion hydraulic cylinder will be unstable, which is very likely to cause safety accidents during operation and has poor safety. However, opening the bearing structure and directly lifting and sliding the propulsion hydraulic cylinder avoids the above problems and effectively improves the safety of the operation.

[0023] A larger space is needed to meet the needs of the propulsion hydraulic cylinder for axial movement, but the space of the shield tunnel is small, and the disassembly and assembly work space is even narrower. Therefore, a larger space is required for disassembly and assembly operations, and the operation process is relatively fixed. The assembled bearing structure can be lifted and lowered after the propulsion hydraulic cylinder is released, which does not require a larger working space and can be synchronized with the previous operation, improving the working efficiency and being more flexible.

[0024] The propulsion hydraulic cylinder requires different equipment for axial movement, lifting, translation and transportation, and needs to be transferred back and forth between the equipment during the operation. This not only easily causes damage to the propulsion hydraulic cylinder, but also increases the difficulty and duration of the operation. After adopting the assembled load-bearing structure, only a lifting installation vehicle is needed to realize the disassembly, assembly and transfer of the propulsion hydraulic cylinder, which has the advantages of higher efficiency, better protection and reduced workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the load-bearing state of a pair of propulsion hydraulic cylinders of the load-bearing structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the load-bearing state of two pairs of propulsion hydraulic cylinders of the load-bearing structure of the present invention;

[0028] Figure 4 It is a schematic side view of the overall structure of the bearing structure of the present invention;

[0029] Figure 5 It is a schematic diagram of the fixed bearing plate structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the movable bearing plate of the present invention.

[0031] Figure numerals: 1, middle shield shell; 2, tail shield shell; 3, load-bearing structure one; 31, fixed load-bearing plate; 311, mounting plate; 312, fixed groove; 32, movable load-bearing plate; 4, load-bearing structure two; 5, propulsion hydraulic cylinder. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. 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 making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] like Figure 1As shown, embodiment 1 of the present invention is an assembled bearing structure of a shield machine propulsion hydraulic cylinder, which is used to bear the propulsion hydraulic cylinder 5 of the shield machine. The propulsion hydraulic cylinder 5 is arranged at intervals on the middle shield of the shield machine, and each propulsion hydraulic cylinder 5 is carried by a bearing structure 1 3 and a bearing structure 2 4. The assembled bearing structure includes a middle shield shell 1, a tail shield shell 2, a bearing structure 1 3 and a bearing structure 2 4. The bearing structure 1 3 is arranged on the middle shield shell 1, and the bearing structure 2 4 is arranged on the tail shield shell 2. The bearing structure 1 3 and the bearing structure 2 4 are arranged in front and back correspondence, and correspond to the propulsion hydraulic cylinder 5, and are respectively located in the middle and tail of the propulsion hydraulic cylinder 5, so as to realize stable bearing of the propulsion hydraulic cylinder 5. The propulsion hydraulic cylinder 5 is arranged on the bearing structure 1 3 and the bearing structure 2 4, and is detachably connected to the bearing structure 1 3 and the bearing structure 2 4.

[0035] like Figure 1 , 2 As shown in Figures 3 and 4, further, the bearing structure 1 3 and the bearing structure 2 4 both include a fixed bearing plate 31 and a movable bearing plate 32, the fixed bearing plate 31 of the bearing structure 1 3 is fixedly connected to the middle shield shell 1, the fixed bearing plate 31 of the bearing structure 2 4 is fixedly connected to the tail shield shell 2, and the movable bearing plate 32 is detachably connected to the fixed bearing plate 31 and is located below the fixed bearing plate 31.

[0036] The specific application of the first embodiment is to fix the fixed bearing plate 31 to the middle shield shell 1 and the tail shield shell 2, and fix the movable bearing plate 32 to the fixed bearing plate 31 by bolt connection to form an assembled structure. When disassembling the propulsion hydraulic cylinder 5, the bolts are opened to separate the movable bearing plate 32 from the fixed bearing plate 31. At this time, there is no obstruction below the propulsion hydraulic cylinder 5. After untying the connection between the propulsion hydraulic cylinder 5 and the middle shield, the propulsion hydraulic cylinder 5 can be dropped downward to achieve disassembly. It is no longer necessary to completely push the propulsion hydraulic cylinder 5 outward along its axis and then perform the falling operation, which saves the process and makes the operation more convenient. The fixed bearing plate 31 fixed on the middle shield shell 1 and the tail shield shell 2 is discarded together with the shield shell, and then the movable bearing plate 32 and the propulsion hydraulic cylinder 5 are transferred to the next working section for installation. During installation, after the propulsion hydraulic cylinder 5 is lifted into place, the movable bearing plate 32 is inserted into the pre-installed fixed bearing plate 31, and after being locked with bolts, the stable bearing of the propulsion hydraulic cylinder 5 can be achieved.

[0037] Furthermore, the thrust hydraulic cylinders 5 are arranged at intervals along the circumference of the shield machine, the bearing structure 1 3 and the bearing structure 2 4 are arranged in a one-to-one correspondence with the thrust hydraulic cylinders 5, the bearing structure 1 3 is arranged at intervals along the axial direction on the middle shield shell 1, and the bearing structure 2 4 is arranged at intervals along the axial direction on the tail shield shell 2.

[0038] like Figure 4 , 5As shown in Figure 6, further, the fixed bearing plate 31 includes a mounting plate 311 and a fixing groove 312. The mounting plate 311 of the bearing structure 1 3 is fixedly connected to the middle shield shell 1, the mounting plate 311 of the bearing structure 2 4 is fixedly connected to the tail shield shell 2, and the fixing groove 312 is fixedly connected to the mounting plate 311. The opening of the fixing groove 312 is set in the direction of the axis of the shield machine, and the movable bearing plate 32 is located in the fixing groove 312.

[0039] Furthermore, the fixing groove 312 is a U-shaped groove, and the movable bearing plate 32 is a straight plate.

[0040] Furthermore, the slotting direction of the fixing slot 312 is arranged along the circumference of the shield machine. The slot structure can achieve stable fixation of the movable bearing plate 32, ensure the connection stability and safety of the structure, and the slot is arranged downward to facilitate the installation of the movable bearing plate 32.

[0041] Furthermore, the mounting plate 311 and the fixing slot 312 are an integrated structure.

[0042] like Figure 5 , 6 As shown, further, both the fixed bearing plate 31 and the movable bearing plate 32 are provided with a card slot, and the card slot is opened on the plate surface of the fixed bearing plate 31 and the movable bearing plate 32, and the axis of the card slot is colinear with the axis of the propulsion hydraulic cylinder 5. The card slot on the fixed bearing plate 31 and the card slot on the movable bearing plate 32 are relatively arranged. After the movable bearing plate 32 is installed on the fixed bearing plate 31, the two opposite card slots are combined to form a circular bayonet. After the movable bearing plate 32 is installed, the propulsion hydraulic cylinder 5 is fixed in the circular bayonet to maintain stability.

[0043] Furthermore, the movable bearing plate 32 is detachably connected to the fixed bearing plate 31 via connecting bolts, and two bolts are used to connect the fixed bearing plate 31 and the movable bearing plate 32 , and the two bolts are respectively located on both sides of the slot.

[0044] Furthermore, the fixed bearing plate 31 is welded to the middle shield shell 1 and the tail shield shell 2 .

[0045] An operating method of an assembled bearing structure of a shield machine propulsion hydraulic cylinder comprises the following steps:

[0046] S1, component prefabrication: according to the drawings, a fixed bearing plate 31 and a movable bearing plate 32 are manufactured, and the fixed bearing plate 31 is pre-welded to the shield shell of the shield machine. During welding, the fixed bearing plate 31 of the bearing structure 1 3 and the fixed bearing plate 31 of the bearing structure 2 4 are ensured to correspond front to back;

[0047] S2, lifting the propulsion hydraulic cylinder: after the shield machine is ready for going down into the well, the propulsion hydraulic cylinder 5 to be installed is moved to the shield shell by the installation vehicle, and the position is adjusted so that the propulsion hydraulic cylinder 5 reaches the installation position. Then the installation vehicle is raised to lift the propulsion hydraulic cylinder 5 upward, so that the propulsion hydraulic cylinder 5 is located in the slot of the fixed bearing plate 31, and the lifting state is maintained. Then, the front end of the propulsion hydraulic cylinder 5 is connected to the middle shield.

[0048] S3, fix the propulsion hydraulic cylinder: keep the propulsion hydraulic cylinder 5 in the lifting state, insert the movable bearing plate 32 of the bearing structure 1 3 and the movable bearing plate 32 of the bearing structure 2 4 into the corresponding fixed bearing plate 31 in turn, and connect and lock them with connecting bolts. After the movable bearing plate 32 is locked and the connection is checked to be stable, drop the installation vehicle and disconnect the lifting of the propulsion hydraulic cylinder 5 by the installation vehicle. At this time, the propulsion hydraulic cylinder 5 is supported and fixed by the bearing structure 1 3 and the bearing structure 2 4;

[0049] S4, shield machine construction: assembly, commissioning and excavation of the shield machine;

[0050] S5, dismantling of the shield machine: dismantling the shield machine shell, and after the shield machine is ready to dismantle the hydraulic cylinder, the installation vehicle is hoisted underground;

[0051] S6, lifting by the propulsion hydraulic cylinder: the installation vehicle moves to the shield, adjusts its position so that it reaches directly below the propulsion hydraulic cylinder 5, lifts the installation vehicle until it contacts the cylinder body of the propulsion hydraulic cylinder 5, and then adjusts the lifting height of the installation vehicle until the weight of the propulsion hydraulic cylinder 5 is completely borne by the installation vehicle, keeps the installation vehicle in the lifted state, and then removes the movable bearing plate 32 from the fixed bearing plate 31, and there is no obstacle below the propulsion hydraulic cylinder 5, so that the propulsion hydraulic cylinder 5 falls completely on the installation vehicle;

[0052] S7, disassembly of the propulsion hydraulic cylinder: control the installation vehicle to descend, and when the installation vehicle descends, drive the propulsion hydraulic cylinder 5 to descend together, until the propulsion hydraulic cylinder 5 descends into place, and then transfer the propulsion hydraulic cylinder 5 and lift it out of the ground.

[0053] When disassembling and assembling the propulsion hydraulic cylinder 5, there is no need for the segment assembly machine to perform axial translation of the segment, and there is no need for the segment assembly machine to cooperate with the cylinder bracket. Similarly, there is no need to transfer the propulsion hydraulic cylinder 5 between different equipment. Only an installation vehicle consisting of a lifting vehicle and a lifting manipulator is needed to achieve disassembly and assembly of the propulsion hydraulic cylinder 5. The defects of the existing construction plan, such as complicated operations, great safety hazards, fixed procedures, and high requirements for the working environment, are avoided. It is easier to operate and implement, which greatly improves the working efficiency.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

Claims

1. An operating method of an assembled bearing structure of a thrust hydraulic cylinder of a shield machine, the assembled bearing structure being used to bear the thrust hydraulic cylinder (5) of the shield machine, the thrust hydraulic cylinder (5) being arranged at intervals on the middle shield of the shield machine, the assembled bearing structure comprising a middle shield shell (1), a rear shield shell (2), a bearing structure 1 (3) and a bearing structure 2 (4), the bearing structure 1 (3) being arranged on the middle shield shell (1), the bearing structure 2 (4) being arranged on the rear shield shell (2), the bearing structure 1 (3) and the bearing structure 2 (4) being arranged in a front-to-back correspondence, the thrust hydraulic cylinder (5) being arranged on the bearing structure 1 (3) and the bearing structure 2 (4), and being detachably connected to the bearing structure 1 (3) and the bearing structure 2 (4); The bearing structure one (3) and the bearing structure two (4) both comprise a fixed bearing plate (31) and a movable bearing plate (32); the fixed bearing plate (31) of the bearing structure one (3) is fixedly connected to the middle shield shell (1); the fixed bearing plate (31) of the bearing structure two (4) is fixedly connected to the tail shield shell (2); and the movable bearing plate (32) is detachably connected to the fixed bearing plate (31); The fixed bearing plate (31) comprises a mounting plate (311) and a fixing groove (312); the mounting plate (311) is fixedly connected to the middle shield shell (1) and the tail shield shell (2); the fixing groove (312) is fixedly connected to the mounting plate (311); the fixing groove (312) is opened inwardly; and the movable bearing plate (32) is located in the fixing groove (312); The fixed bearing plate (31) and the movable bearing plate (32) are both provided with a slot, the slot on the fixed bearing plate (31) and the slot on the movable bearing plate (32) are arranged relative to each other to form a circular bayonet, and the propulsion hydraulic cylinder (5) is located in the circular bayonet; The movable bearing plate (32) is detachably connected to the fixed bearing plate (31) via connecting bolts; Its characteristics are: The operation method includes the following steps: S1, component prefabrication: manufacturing a fixed bearing plate (31) and a movable bearing plate (32) according to the drawings, and pre-installing the fixed bearing plate (31) on the shield shell of the shield machine; S2, lifting the propulsion hydraulic cylinder: after the shield machine is ready for lowering into the well, the propulsion hydraulic cylinder (5) to be installed is moved to the shield shell by an installation vehicle, and then the installation vehicle is raised to lift the propulsion hydraulic cylinder (5) upward to the installation height and keep the lifting state, and the propulsion hydraulic cylinder (5) is connected to the middle shield, and the propulsion hydraulic cylinder (5) is located in the slot of the fixed bearing plate (31); S3, fixing the propulsion hydraulic cylinder: maintaining the lifting state of the propulsion hydraulic cylinder (5), docking the movable bearing plate (32) with the fixed bearing plate (31), and connecting and locking them by connecting bolts, and after the movable bearing plate (32) is locked, lowering the installation vehicle, disengaging the lifting of the propulsion hydraulic cylinder (5) by the installation vehicle, and supporting and fixing the propulsion hydraulic cylinder (5) by the bearing structure 1 (3) and the bearing structure 2 (4); S4, shield machine construction: assembly, commissioning and excavation of the shield machine; S5, dismantling of the shield machine: dismantling the shield machine shell, and after the shield machine is ready to dismantle the hydraulic cylinder, the installation vehicle is hoisted underground; S6, lifting with the propulsion hydraulic cylinder: the installation vehicle is raised until it contacts the cylinder body of the propulsion hydraulic cylinder (5), and then the height of the installation vehicle is adjusted until the weight of the propulsion hydraulic cylinder (5) is completely borne by the installation vehicle, the installation vehicle is kept in the lifted state, and then the movable bearing plate (32) is removed from the fixed bearing plate (31), so that the propulsion hydraulic cylinder (5) completely falls on the installation vehicle; S7, disassembly of the propulsion hydraulic cylinder: control the installation vehicle to descend, and when the installation vehicle descends, drive the propulsion hydraulic cylinder (5) to descend together, until the propulsion hydraulic cylinder (5) descends into place, and then transfer the propulsion hydraulic cylinder (5) and lift it out of the ground.

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