Cutter changing tool for cutter head normal-pressure cutter changing of shield tunneling machine

Abstract

The utility model discloses a tool changing tool for normal-pressure tool changing of a shield tunneling machine cutterhead. The technical problem that in the replacement process of an existing cutter, cutter sealing is prone to abrasion and failure is mainly solved. The tool changing device comprises a tool changing oil cylinder and a positioning piece which is fixed relative to the tool changing oil cylinder and used for supporting the tool cylinder in the direction perpendicular to the installation axial direction of the tool cylinder. The positioning piece can effectively support and position the cutter cylinder, so that the position of the positioning block is correspondingly adjusted through rotation of the screw rod, the purpose of adjusting the angle of the cutter cylinder is achieved, and it is ensured that the moving axial direction of the cutter cylinder is always the same as the axial direction of the outer cylinder body. Therefore, the problem that in the process that the cutter cylinder enters the outer cylinder body, friction or interference between the seal at the outer edge and the outer cylinder body affects the seal of the cutter cylinder or causes seal failure is avoided.

Description

Technical Field

[0001] This application relates to the field of tunnel boring machine (TBM) equipment technology, specifically to a tooling for changing cutterheads under normal pressure in a TBM. Background Technology

[0002] During the tunneling process, the cutters of a tunnel boring machine (TBM) will continuously wear down. When the wear reaches a certain level, they must be replaced to ensure tunneling efficiency and safety. Atmospheric pressure cutter replacement refers to the operation where, under conditions where the ground has been reinforced or has already undergone ground reinforcement treatment, and the stability of the excavation face is guaranteed, workers can enter the slurry or soil chamber without pressure to inspect and replace the cutters.

[0003] When performing a tool change, refer to Figure 1 First, flushing is performed through the flushing ball valve 12 at the outer cylinder 11 to prevent rock debris from being carried out during cutterhead replacement. After cleaning and closing the flushing ball valve, the cutterhead replacement cylinder 13 is lifted using a cutterhead replacement crane, and its fixed end is aligned and fixedly connected with the cylinder fixing seat at the cutterhead of the tunnel boring machine. Then, the movable end of the cutterhead replacement cylinder 13 is extended and pressed against the cutterhead cylinder. Then, the fixing bolts of the cutterhead cylinder 1 are loosened, and the cutterhead replacement cylinder 13 is gradually retracted. After the cutterhead cylinder 1 is partially withdrawn from the outer cylinder, the gate valve 14 at the cutterhead is closed to prevent rock and water from entering the chamber. After the worn cutterhead is replaced, the fixed end of the cutterhead replacement cylinder 13 is inserted into the cavity of the cutterhead cylinder 1 and connected to the flange between the cutterhead cylinders, thereby providing force support for the cutterhead cylinder. Then, the cylinder is retracted until the cutterhead cylinder is completely inside the cylinder of the cutterhead replacement cylinder. Following the reverse steps above, the replaced cutterhead cylinder 1 is inserted into the outer cylinder through the corresponding cutterhead replacement cylinder 13 to complete the installation of the cutterhead cylinder.

[0004] However, in the process of implementing the technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems: When installing the tool, as the tool barrel is gradually inserted into the outer cylinder 11 as the tool changing cylinder extends, the tool barrel has a certain weight, and its weight is entirely supported by the piston rod of the tool changing cylinder. This causes the tool barrel to deviate from the axis as the extension distance increases, resulting in friction or interference between the outer wall of the tool barrel and the inner wall of the outer cylinder. This causes the tool seal at the outer edge of the outer cylinder to be worn, which seriously affects the tool sealing effect.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] In view of at least one of the above-mentioned technical problems, this disclosure provides a tooling for atmospheric pressure tool changing of tunnel boring machine cutterheads. It mainly solves the technical problem of easy wear and failure of tool seals during existing tool changing processes.

[0007] According to one aspect of the present disclosure, a cutter changing tool for normal pressure cutter changing of a cutter head of a tunneling machine is provided, which comprises a cutter changing oil cylinder and a positioning member fixed opposite to the cutter changing oil cylinder and used for supporting the cutter drum in a direction perpendicular to the axial direction of the cutter drum.

[0008] In some embodiments of the present disclosure, the positioning member comprises a positioning block used for abutting against the cutter drum, a screw rod threadedly connected to the corresponding end of the positioning block and penetrating the cylinder barrel of the cutter changing oil cylinder, and clamping nuts threadedly connected to the screw rod and arranged on both sides of the cylinder barrel of the cutter changing oil cylinder.

[0009] In some embodiments of the present disclosure, a window is arranged at the cylinder barrel of the cutter changing oil cylinder and used for mounting or dismounting the positioning block.

[0010] In some embodiments of the present disclosure, the positioning block comprises a positioning surface with a curvature matching that of the cutter drum.

[0011] In some embodiments of the present disclosure, the positioning surface is made of nylon or rubber.

[0012] In some embodiments of the present disclosure, a roller set is symmetrically arranged at the positioning block and rotates in the movement direction of the cutter drum and correspondingly contacts the cutter drum at the positioning surface.

[0013] In some embodiments of the present disclosure, the positioning member further comprises a fixing block penetrating the screw rod and fixed by the clamping nuts and corresponding to the outer edge of the cylinder barrel of the cutter changing oil cylinder.

[0014] In some embodiments of the present disclosure, the fixing block comprises a fixing surface with a contour corresponding to that of the outer edge of the cylinder barrel of the cutter changing oil cylinder.

[0015] In some embodiments of the present disclosure, the positioning member is symmetrically arranged on both sides of the cutter drum.

[0016] The one or more technical solutions provided in the embodiments of the present disclosure have at least the following technical effects or advantages:

[0017] 1. The positioning member can effectively support and position the cutter drum, so that the position of the positioning block is correspondingly adjusted by rotating the screw rod, thereby achieving the purpose of adjusting the angle of the cutter drum and ensuring that the movement axial direction of the cutter drum is always the same as the axial direction of the outer drum body, thereby avoiding the problem that the seal at the outer edge of the cutter drum is affected or fails due to friction or interference between the seal and the outer drum body during the process of the cutter drum entering the outer drum body.

[0018] 2. The roller set at the positioning block can effectively reduce the friction between the positioning block and the cutter drum, thereby further reducing the problem of cutter drum wear caused by the support of the positioning member.

[0019] 3. The positioning block, the fixed block, the screw rod and the clamping nut are detachably connected, so that after the cutter barrel end enters the outer barrel body, the positioning member can be removed as needed, having high use flexibility and convenience. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The process state diagram of atmospheric pressure tool changing in the background art of the present application.

[0021] Figure 2 The main structure diagram of the tool changing tool in an embodiment of the present application.

[0022] Figure 3 The partial structure diagram of the positioning member in an embodiment of the present application.

[0023] In the above figures, 1 is a cutter barrel, 11 is an outer barrel body, 12 is a flushing ball valve, 13 is a tool changing oil cylinder, 14 is a gate valve, 2 is a tool changing oil cylinder, 21 is a flange plate, 3 is a positioning member, 31 is a positioning block, 311 is a positioning surface, 312 is a roller set, 32 is a screw rod, 33 is a clamping nut, and 34 is a fixed block. DETAILED DESCRIPTION

[0024] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In order to better understand the technical solutions of the present application, the above technical solutions will be described in detail below in combination with the drawings and specific embodiments of the specification.

[0026] To solve the problem that the existing tool changing tool is easy to cause tool seal wear and failure due to offset of the movement axis when the cutter barrel is ejected, the present example discloses a tool changing tool for atmospheric pressure tool changing of a cutter head of a shield tunneling machine. Referring to Figure 2 The tool changing tool includes a tool changing oil cylinder 2 and a positioning member 3 fixed opposite to the tool changing oil cylinder 2.

[0027] Specifically, referring to Figure 2In this example, one end of the tool changing oil cylinder 2 is provided with a flange plate 21. When the tool is changed or installed, the tool changing oil cylinder 2 is lifted by the tool changing crane to the same height as the tool barrel to be changed. In order to be able to pull out or push in the tool barrel from the outer barrel by the tool changing oil cylinder 2, the flange plate 21 is arranged at one end of the tool changing oil cylinder 2 to fixedly connect the tool changing oil cylinder 2 with the outer barrel flange of the corresponding tool of the cutter head of the shield tunneling machine, thereby realizing the fixation and force support of the tool changing oil cylinder 2.

[0028] During the tool changing process, the fixed end of the movable end of the tool changing oil cylinder 2 is fixedly connected with the tool barrel, and the tool barrel is pushed in or pulled out by the action of the oil cylinder. However, during the tool changing and installation process, the tool barrel provided with the end head has a certain weight, and the weight is all concentrated at the movable end of the tool changing oil cylinder 2, and there is a certain gap between the tool barrel and the cylinder barrel of the tool changing oil cylinder 2, so that after the tool changing oil cylinder 2 is fixedly connected with the outer barrel stable flange, the tool barrel deviates from its movement axis under the action of gravity when the movable end of the tool changing oil cylinder extends, thereby causing friction between the outer edge of the tool barrel and the end of the outer barrel, and since the outer edge of the tool barrel is provided with a tool barrel seal, the seal is worn, which seriously affects the sealing effect of the tool barrel and even causes the seal to fail.

[0029] Therefore, referring to Figure 2 , a positioning member is fixedly arranged at the cylinder barrel of the tool changing oil cylinder 2, which realizes the support along the direction perpendicular to the movement axis of the tool barrel, thereby ensuring that the movement direction of the tool barrel 1 is always the same as the designed movement direction during the process that the movable end of the tool changing oil cylinder extends into the outer barrel, thereby avoiding the wear of the tool barrel seal. In this embodiment, two positioning members are fixedly arranged on both sides of the tool changing oil cylinder 2 in a symmetrical manner, and effective support force is provided on both sides of the tool barrel 1, thereby ensuring that the movement direction of the tool barrel does not deviate.

[0030] Specifically, referring to Figure 3 , in this embodiment, the positioning member includes a positioning block 31, which is arranged in the gap range between the tool barrel and the cylinder barrel of the tool changing oil cylinder, and realizes the support of the tool barrel by contacting the outer edge of the tool barrel. However, in order to realize the relative fixation of the position of the positioning block 31 and realize the support effect of the tool barrel, in this embodiment, one end of the positioning block 31 is provided with a bolt blind hole for threadedly connecting a screw rod 32, and the corresponding position of the cylinder barrel of the tool changing oil cylinder 2 is provided with a screw rod through hole for penetrating the screw rod 32, in addition, the screw rod 32 is threadedly connected with two clamping nuts 33 (not shown in the figure), which are respectively clamped on both sides of the cylinder barrel of the tool changing oil cylinder 2, thereby realizing the relative stability of the screw rod 32, and further realizing the relative stability of the position of the positioning block 31. In addition, by rotating the screw rod 32, the screw rod 32 can be screwed in or out relative to the cylinder barrel of the tool changing oil cylinder, thereby realizing the relative adjustment of the position of the positioning block 31 to adapt to tool barrels of different diameters, and achieving the positioning and support effect. Figure 3 ​

[0031] In some other embodiments, since the cylinder of the tool changing cylinder has a certain thickness, the screw through hole for the screw rod is set as a threaded hole, thereby eliminating the need for a clamping nut. The screw rod is directly threadedly connected to the cylinder of the tool changing cylinder, and the position of the positioning block can be adjusted.

[0032] In addition, in this embodiment, the positioning block 31 includes a positioning surface 311 whose curvature matches that of the cutter barrel 1. In some other embodiments, the support and positioning effect is achieved through the contact between the positioning surface 311 and the outer edge of the cutter barrel 1. In this example, to reduce the friction between the cutter barrel 1 and the positioning block 31 during its movement, the positioning block is made of nylon or rubber. In this embodiment, to further reduce the friction between the cutter barrel 1 and the positioning block 31, see [link to relevant documentation]. Figure 3 A roller assembly 312 is provided at the positioning block 31. Specifically, in this example, the roller assembly 312 is symmetrically arranged on both sides of the positioning surface 311. The positioning block has a window hole for mounting the roller assembly 312 at the corresponding position. The rotation direction of the roller assembly 312 is consistent with the movement direction of the cutter cylinder 1. Thus, the roller protruding from the positioning surface 311 achieves line contact with the cutter cylinder 1, thereby reducing the friction between the positioning component and the cutter cylinder when supporting the cutter cylinder, and effectively reducing the wear of the cutter cylinder seal.

[0033] To facilitate the installation and removal of the positioning block 31, in this embodiment, the cylinder of the tool changing cylinder 2 is provided with a corresponding operation window, so that the positioning component can be installed and removed through the window before and after use.

[0034] Furthermore, in this embodiment, considering that the outer edge of the tool changing cylinder is arc-shaped, the clamping force provided by the clamping nut is limited. To further improve the structural and installation stability of the positioning component during use, in this embodiment, see... Figure 3 The positioning component also includes a fixing block 34, which passes through the screw 32 and includes a fixing surface whose contour corresponds to the outer edge contour of the tool changing cylinder. This fixing surface ensures a close contact between the fixing block 34 and the tool changing cylinder. Furthermore, a clamping nut 33 is clamped between the inner side of the tool changing cylinder and the outer side of the fixing block 34, thereby achieving a stable fit between the fixing block 34 and the tool changing cylinder and improving the stability of the positioning component.

[0035] Although some preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0036] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A tool changing tooling for normal pressure tool changing of a cutter head of a tunnel boring machine, comprising a tool changing oil cylinder, characterized in that, The positioning member includes a positioning block for abutting against the tool cylinder, a screw rod threadedly connected with the positioning block and penetrating the cylinder barrel of the tool changing oil cylinder, and clamping nuts threadedly connected with the screw rod and arranged on both sides of the cylinder barrel of the tool changing oil cylinder.

2. The tool changer of claim 1, wherein, The cylinder barrel of the tool changing oil cylinder is provided with a window for mounting or dismounting the positioning block.

3. The tool changer of claim 1, wherein, The positioning block includes a positioning surface with an arc matched with that of the tool cylinder.

4. The tool changer of claim 3, wherein The positioning surface is made of nylon or rubber.

5. The tool changer of claim 3, wherein, The positioning block is symmetrically provided with roller sets rotating along the movement direction of the tool cylinder and in corresponding contact with the tool cylinder at the positioning surface.

6. The tool changer of any of claims 1-5, wherein, The positioning member further includes a fixing block penetrating the screw rod and fixedly abutting against the outer edge of the cylinder barrel of the tool changing oil cylinder through the clamping nuts.

7. The tool changer of claim 6, wherein, The fixing block includes a fixing surface with a contour matched with that of the outer edge of the cylinder barrel of the tool changing oil cylinder.

8. The tool changer of claim 1, wherein, The positioning member is symmetrically arranged on both sides of the tool cylinder.

Images