Compensated cutter head sleeve

Abstract

This utility model relates to the technical field of tunnel boring machine components, specifically a compensating cutterhead sleeve, comprising an inner cylinder and an outer cylinder coaxially and rotatably connected. The inner cylinder is connected to an external rotary joint flange, and the outer cylinder is connected to an external cutterhead L-beam flange. The outer wall of the inner cylinder has several limiting holes, and the inner wall of the outer cylinder has limiting protrusions that correspond one-to-one with the limiting holes, with a clearance fit between the limiting holes and the limiting protrusions. This utility model, by setting coaxial and rotatably connected inner and outer cylinders, and then setting mutually clearance-fitting limiting holes and limiting protrusions on the outer wall of the inner cylinder and the inner wall of the outer cylinder respectively, allows torque to be transmitted through the cooperation of the limiting holes and limiting protrusions during use, enabling the inner and outer cylinders to rotate synchronously. The clearance allows the inner and outer cylinders to swing within the clearance range, thereby achieving angle compensation between plane one and plane two, ensuring smooth installation of the cutterhead sleeve.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel boring machine components, specifically a compensating cutterhead sleeve. Background Technology

[0002] The cutterhead of a tunnel boring machine (TBM) is equipped with multiple foam nozzles, water-air channels, and hydraulic channels. The water-air channels primarily add foam and water to the excavation face and soil chamber, while the hydraulic channels generally provide power for cutterhead detection and over-digging. All these channels and functions require subsequent piping to connect to the cutterhead. Since the cutterhead rotates continuously during TBM excavation, a rotary joint is typically used to prevent the piping from tangling. The rotary joint is a piping integrator containing channels of various sizes and functions. All piping from the downstream assembly to the front end converges at the rotary joint, and all piping on the cutterhead converges on the L-beam. Finally, the pipe joints on the L-beam are matched one-to-one with those on the rotary joint to achieve the relevant functions of the cutterhead piping. The connecting pipe (hose) passes through the TBM's soil chamber, where the working conditions are harsh and complex, necessitating protection for the intermediate connecting pipes. Secondly, the rotary joint must rotate with the cutterhead to prevent the piping from tangling. The above two functions are generally achieved using a cutter head sleeve. The cutter head sleeve consists of two identical parts (each part is 180°, similar to a cylindrical tube divided into two semicircles). In use, the two parts are fastened onto the cutter head L-beam flange and the swivel joint flange, and bolted together to protect the pipeline. At the same time, the torque of the cutter head rotation can be transmitted to the swivel joint through the cutter head sleeve, causing the swivel joint to rotate together.

[0003] The original design of the cutter head sleeve required plane one and plane two (such as...) Figure 1 and Figure 2 As shown, the planes are relatively parallel. After the tunnel boring machine has been in use for a period of time, due to the complex conditions of the cutterhead soil chamber and the possible presence of hard rock in some strata, the L-beam of the cutterhead may deform. After the cutterhead beam deforms, plane one and plane two are no longer parallel, but have a certain angle between them, which will make it impossible to install the cutterhead sleeve.

[0004] Therefore, this utility model proposes a compensating cutter head sleeve, aiming to solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide a compensating cutter head sleeve to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A compensating cutter head sleeve includes an inner cylinder and an outer cylinder that are coaxially and rotatably connected. The inner cylinder is connected to an external rotary joint flange, and the outer cylinder is connected to an external cutter head L-beam flange. The outer wall of the inner cylinder has a plurality of limiting holes, and the inner wall of the outer cylinder has limiting protrusions that correspond to the limiting holes one by one, with a clearance fit between the limiting holes and the limiting protrusions.

[0008] Preferably, the inner cylinder includes two mutually cooperating semi-circular inner cylinders, and the opposite ends of the semi-circular inner cylinders are respectively provided with mutually cooperating first grooves and first protrusions;

[0009] The outer cylinder comprises two mutually cooperating semi-circular outer cylinders, which are fixedly connected by bolts.

[0010] Preferably, the outer wall of the inner cylinder and the inner wall of the outer cylinder are mutually fitting spherical surfaces.

[0011] Preferably, the outer wall of the inner cylinder has two sealing grooves, and a first sealing ring is provided in the sealing groove, and the two sealing grooves are located on both sides of the limiting hole.

[0012] Preferably, the inner wall of the inner cylinder is provided with a first arc-shaped protrusion, the limiting hole is opened on the surface of the first arc-shaped protrusion, and a second groove is opened on one side of the first arc-shaped protrusion to connect with the flange of the rotary joint.

[0013] Preferably, the outer wall of the rotary joint flange is provided with a second sealing ring.

[0014] Preferably, the inner wall of the outer cylinder is provided with a second arc-shaped protrusion, and the second arc-shaped protrusion is staggered from the limiting protrusion. The width of the inner cylinder is smaller than the width of the outer cylinder. A third groove is provided on one side of the second arc-shaped protrusion to connect with the flange of the cutter head L-beam.

[0015] Preferably, a third sealing ring is provided on the outer wall of the cutter head L-beam flange.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention features a coaxial inner and outer cylinder that rotate relative to each other. Limiting holes and protrusions with mutual clearance fit are provided on the outer wall of the inner cylinder and the inner wall of the outer cylinder, respectively. During use, torque is transmitted through the cooperation of the limiting holes and protrusions, allowing the inner and outer cylinders to rotate synchronously. The clearance allows the inner and outer cylinders to oscillate within the clearance range, thereby achieving angle compensation between plane one and plane two and ensuring smooth installation of the cutter head sleeve. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the original design of the existing technology;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure after removing the original cutter head sleeve;

[0021] Figure 3 This is a schematic diagram of the structure of the compensating cutter head sleeve of this utility model;

[0022] Figure 4 This is a cross-sectional view of the compensating cutter head sleeve of this utility model.

[0023] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0024] Figure 6 This is an exploded structural diagram of the compensating cutter head sleeve of this utility model;

[0025] Figure 7 This is an exploded structural diagram of the inner and outer cylinders in the compensating cutter head sleeve of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Inner cylinder; 11. Semi-circular inner cylinder; 12. First groove; 13. First boss; 14. Sealing groove; 15. First arc-shaped protrusion; 16. Second groove; 2. Outer cylinder; 21. Semi-circular outer cylinder; 22. Second arc-shaped protrusion; 23. Third groove; 3. Limiting hole; 4. Limiting protrusion; 5. Rotary joint flange; 51. Second sealing ring; 6. Cutter head L-beam flange; 61. With third sealing ring; 7. First sealing ring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-7One embodiment of this utility model is as follows:

[0030] A compensating cutter head sleeve includes an inner cylinder 1 and an outer cylinder 2 that are coaxially and rotatably connected. The inner cylinder 1 is connected to an external rotary joint flange 5, and the outer cylinder 2 is connected to an external cutter head L-beam flange 6. The outer wall of the inner cylinder 1 has a plurality of limiting holes 3, and the limiting holes 3 are located on the same circumference. The inner wall of the outer cylinder 2 is provided with limiting protrusions 4 that correspond one-to-one with the limiting holes 3, and there is a clearance fit between the limiting holes 3 and the limiting protrusions 4.

[0031] As can be seen from the above description, this utility model sets up an inner cylinder and an outer cylinder that are coaxial and rotate relative to each other. Then, it sets a limiting hole and a limiting protrusion with mutual clearance fit on the outer wall of the inner cylinder and the inner wall of the outer cylinder, respectively. In use, the torque can be transmitted through the cooperation of the limiting hole and the limiting protrusion, so that the inner cylinder and the outer cylinder can rotate synchronously. The setting of the clearance allows the inner cylinder and the outer cylinder to swing within the clearance range, thereby realizing the angle compensation between plane one and plane two, and ensuring the smooth installation of the cutter head sleeve.

[0032] Specifically, the inner cylinder 1 includes two mutually cooperating semi-circular inner cylinders 11, and the opposite ends of the semi-circular inner cylinders 11 are respectively provided with mutually cooperating first grooves 12 and first protrusions 13;

[0033] The outer cylinder 2 includes two semi-circular outer cylinders 21 that cooperate with each other, and the two semi-circular outer cylinders 21 are fixedly connected by bolts.

[0034] As can be seen from the above description, both the inner and outer cylinders are designed in a semi-locking shape for ease of installation, allowing the two parts to be directly snapped together in a limited space, with external bolts for connection. Furthermore, the cooperation between the first groove and the first protrusion ensures the installation accuracy of the inner cylinder.

[0035] Specifically, the outer wall of the inner cylinder and the inner wall of the outer cylinder are mutually fitting spherical surfaces.

[0036] As can be seen from the above description, using mutually cooperating spherical surfaces can reduce the friction between the inner and outer cylinders, ensuring the relative rotation of the inner and outer cylinders.

[0037] Specifically, two sealing grooves 14 are provided on the outer wall of the inner cylinder 1, and a first sealing ring 7 is provided in the sealing groove 14. The two sealing grooves 14 are located on both sides of the limiting hole 3.

[0038] As can be seen from the above description, two sealing grooves are provided on the inner cylinder for installing two first sealing rings. This not only protects the mating curved surfaces of the inner and outer cylinders, but also protects the limiting hole and the limiting protrusion, and prevents the slag and water in the soil chamber from entering the cutter head sleeve.

[0039] Specifically, the inner wall of the inner cylinder 1 is provided with a first arc-shaped protrusion 15, the limiting hole 3 is opened on the surface of the first arc-shaped protrusion 15, a second groove 16 is opened on one side of the first arc-shaped protrusion 15 to connect with the rotary joint flange 5, and a second sealing ring 51 is provided on the outer wall of the rotary joint flange 5.

[0040] As can be seen from the above description: by aligning the protrusion at the end of the rotary joint flange with the second groove and inserting it, torque transmission between the rotary joint flange and the inner cylinder is achieved, thereby enabling synchronous rotation between the inner cylinder and the rotary joint flange. The second sealing ring can prevent soil and water from the soil chamber from entering the cutter head sleeve.

[0041] Specifically, the inner wall of the outer cylinder 2 is provided with a second arc-shaped protrusion 22, and the second arc-shaped protrusion 22 is staggered from the limiting protrusion 4. The width of the inner cylinder 1 is smaller than the width of the outer cylinder 2. A third groove 23 is provided on one side of the second arc-shaped protrusion 22 to connect with the cutter head L-beam flange 6. A third sealing ring 61 is provided on the outer wall of the cutter head L-beam flange 6.

[0042] As can be seen from the above description: by aligning the protrusion at the end of the cutter head L-beam flange with the third groove and inserting it, the torque transmission between the cutter head L-beam flange and the outer cylinder is realized, so that the cutter head L-beam flange and the outer cylinder can rotate synchronously. The setting of the third sealing ring can prevent the slag and water in the soil chamber from entering the inside of the cutter head sleeve.

[0043] The installation process of the above-mentioned compensating cutter head sleeve is as follows:

[0044] First, install the second sealing ring 51 and the third sealing ring 61 on the cutter head L-beam flange 5 and the rotary joint flange 6 respectively. Then, align the first groove 12 and the first boss 13 of the two semi-circular inner cylinders 1 and insert them to complete the installation of the inner cylinder 1. The first groove 12 and the first boss 13 are respectively set at both ends of the first arc-shaped protrusion 15. Then, insert the two first sealing rings 7 into the sealing groove 14.

[0045] Then align and install the two semi-circular outer cylinders 21, and lock them in place with bolts. When installing the semi-circular outer cylinder 21, make sure that the limiting protrusion 4 on the inner wall of the semi-circular outer cylinder 21 is aligned with the limiting hole 3 on the outer wall of the semi-circular inner cylinder 11 and inserted to complete the installation of the outer cylinder 2.

[0046] Finally, align the protrusion on the L-beam flange 5 of the cutter head with the second groove 16 of the inner cylinder 1 and snap it in to fix it. Then align the protrusion on the rotary joint flange 6 with the third groove 23 of the outer cylinder 2 and snap it in to fix it (this part of the structure is existing technology, and its specific installation process will not be described in detail here), and the final installation is completed.

[0047] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screwing", etc., should be interpreted broadly. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compensating cutter head sleeve, characterized in that: The device includes an inner cylinder (1) and an outer cylinder (2) that are coaxial and rotatably connected. The inner cylinder (1) is connected to an external rotary joint flange (5), and the outer cylinder (2) is connected to an external cutter head L-beam flange (6). The outer wall of the inner cylinder (1) is provided with several limiting holes (3), and the inner wall of the outer cylinder (2) is provided with limiting protrusions (4) that correspond to the limiting holes (3) one by one. The limiting holes (3) and the limiting protrusions (4) are in clearance fit.

2. The compensating cutter head sleeve according to claim 1, characterized in that: The inner cylinder (1) includes two mutually cooperating semi-circular inner cylinders (11), and the opposite ends of the semi-circular inner cylinders (11) are respectively provided with mutually cooperating first grooves (12) and first protrusions (13); the outer cylinder (2) includes two mutually cooperating semi-circular outer cylinders (21), and the two semi-circular outer cylinders (21) are fixedly connected by bolts.

3. A compensating cutter head sleeve according to claim 1 or 2, characterized in that: The outer wall of the inner cylinder (1) has two sealing grooves (14), and a first sealing ring (7) is provided in the sealing groove (14), and the two sealing grooves (14) are located on both sides of the limiting hole (3).

4. A compensating cutter head sleeve according to claim 1 or 2, characterized in that: The outer wall of the inner cylinder (1) and the inner wall of the outer cylinder (2) are spherical surfaces that fit together.

5. A compensating cutter head sleeve according to claim 1, characterized in that: The inner wall of the inner cylinder (1) is provided with a first arc-shaped protrusion (15), and the limiting hole (3) is opened on the surface of the first arc-shaped protrusion (15). A second groove (16) connected to the rotary joint flange (5) is opened on one side of the first arc-shaped protrusion (15).

6. A compensating cutter head sleeve according to claim 5, characterized in that: The outer wall of the rotary joint flange (5) is provided with a second sealing ring (51).

7. A compensating cutter head sleeve according to claim 1, characterized in that: The inner wall of the outer cylinder (2) is provided with a second arc-shaped protrusion (22), and the second arc-shaped protrusion (22) is staggered from the limiting protrusion (4). The width of the inner cylinder (1) is smaller than the width of the outer cylinder (2). A third groove (23) is provided on one side of the second arc-shaped protrusion (22) to connect with the blade L-beam flange (6).

8. A compensating cutter head sleeve according to claim 7, characterized in that: The outer wall of the cutter head L-beam flange (6) is provided with a third sealing ring (61).

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