A new master drive seal runway remote adjustment device

Abstract

The utility model discloses a novel main drive sealing runway remote adjusting device relates to shield machine technical field, including drive box, sealing runway, lip seal, hydraulic oil cylinder, bolt no.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, and in particular to a novel remote adjustment device for a main drive sealed runway. Background Technology

[0002] Currently, the main drive sealing runway (ring component) of tunnel boring machines (TBMs) is an integral structure. During tunnel excavation, the runway and the seal are in rotational friction contact, which can easily lead to wear at the contact point of the runway ring seal after long-term operation. Conventional TBM main drives are designed with a certain degree of adjustability in the sealing runway. When the sealing runway is worn beyond the specified value, the sealing runway can be adjusted to ensure that the seal does not leak.

[0003] The existing adjustment method requires the entire main drive to be disassembled and reassembled. There are two main maintenance methods: one is to adjust the bolts to make the runway wear surface and the seal misaligned. This method requires the tunnel to be opened and construction personnel to enter the soil chamber to adjust the runway ring installation bolts, which poses a great safety risk and cannot achieve automatic adjustment; the other is to repair the wear surface by welding and grinding. This method requires the tunnel boring machine to be moved outside the tunnel, which takes too long and greatly affects the construction progress.

[0004] Existing main drive sealed runway adjustment methods are complex, time-consuming, labor-intensive, and risky due to the high risk of adjustment inside the tunnel. To address this, this invention provides a novel remote adjustment device for main drive sealed runways. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a novel remote adjustment device for a main drive sealed runway, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a novel main drive sealed runway remote adjustment device, comprising a drive box, a sealed runway, a lip seal, a hydraulic cylinder, a bolt, a pipe joint, and a hydraulic oil pipe;

[0007] Both the drive box and the sealed runway are ring structures, installed inside the main drive of the tunnel boring machine and rotating synchronously, while the lip seal is a fixed ring structure.

[0008] The hydraulic cylinder is connected to the drive box by a bolt, and a magnet is provided on the hydraulic cylinder. The sealed runway is attracted to the drive box by the magnet.

[0009] The hydraulic cylinder is connected to the hydraulic oil pipe through a pipe joint, and the hydraulic oil pipe is led out to the outside of the tunnel boring machine.

[0010] As a further technical solution of this utility model, the hydraulic cylinder includes a guide sleeve, a rod cylinder, a piston, a connecting block, a large cavity channel, and a small cavity channel;

[0011] The guide sleeve and the rod are connected by a pin, the rod is connected to the connecting block by two bolts, and the magnet is fixed to the connecting block by glue and its own magnetic attraction.

[0012] As a further technical solution of this utility model, multiple hydraulic cylinders are provided and evenly distributed at the end of the drive box, and a pressure reducing valve and a speed regulating valve are provided on the hydraulic oil pipe.

[0013] As a further technical solution of this utility model, the stroke of the hydraulic cylinder is greater than the width of the initial contact area between the lip seal and the sealing runway.

[0014] As a further technical solution of this utility model, a groove is provided on the side of the drive box to facilitate the operation of bolt one.

[0015] This utility model provides a novel remote adjustment device for a main drive sealed runway, which has the following advantages compared with the prior art:

[0016] 1. This design presents a novel remote adjustment device for a main drive sealed runway. It adopts a remote control method, eliminating the need for construction personnel to enter the soil chamber for operation. This completely avoids the high risks associated with underground chamber adjustments and ensures the personal safety of construction personnel. Furthermore, by using a combination of hydraulic cylinders and magnets, it replaces the traditional bolt connection and bolt adjustment methods. This eliminates the need for complete disassembly and reassembly of the main drive, greatly simplifying the operation process and significantly reducing labor input and construction time.

[0017] 2. This design features a novel remote adjustment device for the main drive sealing track. Multiple hydraulic cylinders are evenly distributed and synchronously supplied with oil through valve blocks. This provides high thrust and ensures smooth adjustment of the sealing track with high precision. It can completely separate the lip seal from the wear area, ensuring a good sealing effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the adjusted structure of a novel main drive sealed runway remote adjustment device.

[0019] Figure 2 This is a schematic diagram of the structure of a novel main drive sealed runway remote adjustment device before adjustment.

[0020] Figure 3 This is a schematic diagram of the hydraulic cylinder in a novel main drive sealed runway remote adjustment device.

[0021] In the diagram: 1. Bolt 1; 2. Hydraulic cylinder; 21. Guide sleeve; 22. Outer shell; 23. Rod cylinder; 24. Piston; 25. Connecting block; 26. Bolt 2; 27. Magnet; 28. Large cavity channel; 29. ​​Small cavity channel; 3. Drive box; 4. Hydraulic oil pipe; 5. Pipe joint; 6. Sealing track; 7. Lip seal. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 This utility model provides a novel main drive sealed runway remote adjustment device technical solution: A novel main drive sealed runway remote adjustment device includes a drive box 3, a sealed runway 6, a lip seal 7, a hydraulic cylinder 2, a bolt 1, a pipe joint 5, and a hydraulic oil pipe 4. Multiple hydraulic cylinders 2 are provided and are evenly distributed at the end of the drive box 3. The hydraulic oil pipe 4 is equipped with a pressure reducing valve and a speed regulating valve, which are used to control the oil pressure and the cylinder extension and retraction speed, respectively, to achieve synchronous and uniform action of multiple hydraulic cylinders. The pressure reducing valve can control the oil pressure entering the hydraulic cylinder 2 to avoid damage to the device due to excessive pressure or failure to push the sealed runway 6 due to insufficient pressure. The speed regulating valve can adjust the hydraulic oil flow to ensure that multiple hydraulic cylinders 2 move synchronously, evenly, and slowly, ensuring that the sealed runway 6 is adjusted smoothly and avoiding tilting. The drive box 3 has a groove on the side for easy operation of the bolt 1, making it convenient for operators to operate the bolt.

[0024] Both the drive box 3 and the sealed runway 6 are ring structures, installed inside the main drive of the tunnel boring machine and rotating synchronously. The lip seal 7 is a fixed ring structure and does not rotate with the main drive. The stroke of the hydraulic cylinder 2 is greater than the width of the initial contact area between the lip seal 7 and the sealed runway 6.

[0025] Hydraulic cylinder 2 is connected to drive box 3 by bolt 1. Magnet 27 is provided on hydraulic cylinder 2. Magnet 27 is fixed to connecting block 25 by glue and its own magnetic attraction. At the same time, it attracts the sealed runway 6, realizing a flexible connection between hydraulic cylinder 2 and sealed runway 6. This ensures connection strength and facilitates force transmission during adjustment. The sealed runway 6 is connected to drive box 3 by magnet 27. Hydraulic cylinder 2 is connected to hydraulic oil pipe 4 by pipe joint 5. Hydraulic oil pipe 4 is led out to the outside of the tunnel boring machine for accessing hydraulic oil. Hydraulic cylinder 2 includes guide sleeve 21, rod cylinder 23, piston 24, connecting block 25, large cavity channel 28 and small cavity channel 29. Guide sleeve 21 and rod cylinder 23 are connected by pin. Rod cylinder 23 and connecting block 25 are connected by bolt 26. Magnet 27 is fixed to connecting block 25 by glue and its own magnetic attraction. The large cavity channel 28 and small cavity channel 29 are used to access hydraulic oil and control the extension and retraction of hydraulic cylinder 2.

[0026] The working principle of this utility model is as follows: the drive box 3 and the sealed runway 6 are both installed inside the main drive of the tunnel boring machine. Both are annular parts and are coaxially arranged. Multiple hydraulic cylinders 2 are evenly arranged at the end of the drive box 3. The hydraulic cylinders 2 are fixed to the drive box 3 by bolts 1. The groove on the side of the drive box 3 makes it easy for the operator to tighten the bolts 1. The sealed runway 6 is attracted and fixed to the drive box 3 by the magnets 27 on the hydraulic cylinders 2, ensuring that the connection between the two is stable. The large cavity channel 28 and the small cavity channel 29 of the hydraulic cylinder 2 are connected to the hydraulic oil pipe 4 through the pipe joint 5. The hydraulic oil pipe is led out to the outside of the tunnel boring machine, and a pressure reducing valve and a speed regulating valve are installed in sequence.

[0027] When the wear of the sealing runway 6 exceeds the specified depth, the remote control system is activated to supply oil to the hydraulic oil pipe 4 through the external hydraulic station. After the oil pressure is adjusted to the specified oil pressure by the pressure reducing valve, the flow rate is controlled by the speed regulating valve and enters the large cavity channel 28 of the hydraulic cylinder 2. The hydraulic oil pushes the rod cylinder 23 to extend. The rod cylinder 23 drives the connecting block 25 and the magnet 27 to move synchronously, thereby driving the sealing runway 6 to rise smoothly. Because multiple hydraulic cylinders 2 move synchronously, the sealing runway 6 maintains a horizontal rise. Its stroke is set to exceed the width of the initial contact area between the lip seal 7 and the sealing runway 6, ensuring that the contact area between the lip seal 7 and the sealing runway 6 completely avoids the wear position after adjustment.

[0028] When reverse adjustment is required, hydraulic oil is controlled to enter the small cavity channel 29 of hydraulic cylinder 2. The hydraulic oil pushes the guide sleeve 21 to retract, thereby driving the rod cylinder 23, connecting block 25 and magnet 27 to move in the opposite direction. The sealed runway 6 falls back to the target position synchronously with magnet 27.

[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A novel remote adjustment device for a main drive sealed runway, characterized in that, Includes drive box (3), sealed runway (6), lip seal (7), hydraulic cylinder (2), bolt (1), pipe joint (5) and hydraulic oil pipe (4); The drive box (3) and the sealed runway (6) are both ring structures, installed inside the main drive of the tunnel boring machine and rotate synchronously, and the lip seal (7) is a fixed ring structure; The hydraulic cylinder (2) is connected to the drive box (3) by bolt (1), and the hydraulic cylinder (2) is provided with a magnet (27). The sealed runway (6) is connected to the drive box (3) by magnet (27). The hydraulic cylinder (2) is connected to the hydraulic oil pipe (4) through the pipe joint (5), and the hydraulic oil pipe (4) is led out to the outside of the tunnel boring machine.

2. The novel main drive sealed runway remote adjustment device according to claim 1, characterized in that, The hydraulic cylinder (2) includes a guide sleeve (21), a rod cylinder (23), a piston (24), a connecting block (25), a large cavity channel (28), and a small cavity channel (29); The guide sleeve (21) and the rod cylinder (23) are connected by a pin, the rod cylinder (23) and the connecting block (25) are connected by bolts (26), and the magnet (27) is fixed to the connecting block (25) by glue and its own magnetic attraction.

3. The novel main drive sealed runway remote adjustment device according to claim 1, characterized in that, Multiple hydraulic cylinders (2) are provided and are evenly distributed at the end of the drive box (3). A pressure reducing valve and a speed regulating valve are provided on the hydraulic oil pipe (4).

4. The novel main drive sealed runway remote adjustment device according to claim 1, characterized in that, The stroke of the hydraulic cylinder (2) is greater than the width of the initial contact area between the lip seal (7) and the sealing runway (6).

5. A novel remote adjustment device for a main drive sealed runway according to claim 1, characterized in that, The drive box (3) has a groove on its side for easy operation of bolt 1 (1).

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