Continuous tunneling shield machine sliding cylinder sealing and wear-resistant system

Abstract

This utility model discloses a sealing and wear-resistant system for the sliding cylinder of a continuous tunneling shield machine, comprising a sealing system and a wear-resistant system disposed between an inner and an outer sliding cylinder. The sealing system includes finger-shaped sealing rings and an airbag disposed between the inner and outer sliding cylinders. Two circumferential finger-shaped sealing rings ensure the sealing performance of the inner and outer sliding cylinders. The airbag inflates in emergencies as a secondary protection, ensuring the sealing performance of the mating surfaces of the inner and outer sliding cylinders and the safety of construction. Multiple types and multi-layered combined sealing forms are specifically designed, and the adjustable airbag seal solves the problem of mud leakage between the inner and outer sliding cylinders. The wear-resistant system includes wear-resistant ring plates and wear-resistant strips. By setting wear-resistant ring plates and wear-resistant strips, the service life of the structure is effectively guaranteed. A combined wear-resistant plate is installed at the rear of the inner sliding cylinder to avoid rigid friction of the inner and outer sliding cylinders during sliding, ensuring the safety and reliability of long-distance tunneling.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a continuous tunneling shield machine slide cylinder sealing and wear-resistant system. Background Technology

[0002] As the core equipment in modern urban subway tunnel construction, the efficiency and safety of tunnel boring machines (TBMs) are of paramount importance. Traditional TBMs operate intermittently, with the cutterhead excavation and segment assembly occurring simultaneously. Each TBM is equipped with a hydraulic jacking system. During excavation, the jacking system provides the forward propulsion for the cutterhead to cut the soil. During this time, segment assembly cannot be performed. After one jacking stroke, the machine stops advancing, and a segment assembly machine, in conjunction with the jacking system, assembles the segments. Once the entire ring of segments is assembled, the next cycle of jacking and assembly begins. Therefore, TBMs cannot achieve continuous excavation, significantly reducing construction efficiency.

[0003] To address the aforementioned issues, a continuous-push-and-assemble shield tunneling machine (TBM) was designed. This machine adds a shield structure and a propulsion system to the traditional TBM. The entire system comprises two propulsion systems: one provides power for the TBM's jacking operation, and the other works in conjunction with an assembly machine to assemble the tunnel segments, enabling continuous operation of the TBM. The newly added shield structure of the continuous-push-and-assemble TBM features an inner and outer sliding cylinder nested together. During operation, these two cylinders slide relative to each other, making the seal between them crucial. The sealing system prevents mud from entering the shield, as mud entry accelerates seal failure. Furthermore, during continuous long-distance tunneling, the relative sliding of the inner and outer sliding cylinders necessitates the design of a wear-resistant system between them to ensure safety throughout the construction process. Utility Model Content

[0004] The purpose of this utility model is to solve the above problems and provide a continuous tunneling shield machine slide cylinder sealing and wear-resistant system. It is designed with multiple sealing forms combined and installed to prevent seal detachment and failure. The rear of the outer slide cylinder is equipped with a combined wear-resistant plate to avoid rigid friction when the inner and outer slide cylinders slide, thus ensuring the safety and reliability of long-distance tunneling.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A sealing and wear-resistant system for the sliding cylinder of a continuous tunneling shield machine includes a sealing system and a wear-resistant system disposed between an inner sliding cylinder and an outer sliding cylinder. The sealing system includes a finger-shaped sealing ring and an air bladder disposed between the inner and outer sliding cylinders. The wear-resistant system includes a wear-resistant ring plate and a wear-resistant strip.

[0007] Furthermore, two finger-shaped sealing rings are arranged side by side.

[0008] Furthermore, pressure blocks for pressing down on the finger-shaped sealing rings are provided between the finger-shaped sealing rings and on the outside of the finger-shaped sealing rings.

[0009] Furthermore, the inner slide tube is provided with a mounting bracket at its end, and the airbag is mounted on the mounting bracket.

[0010] Furthermore, the mounting bracket has a stop block at the front end, a baffle plate at the rear of the stop block, and an adjusting screw on the stop block for adjusting the position of the baffle plate to press the airbag.

[0011] Furthermore, a sealing strip is installed between the front end face of the inner slide cylinder and the mating surface of the mounting bracket.

[0012] Furthermore, both the wear-resistant ring plate and the wear-resistant strip are mounted on the inner slide cylinder by screws.

[0013] Furthermore, the outer sliding cylinder is connected to the front shield via a flange, the inner sliding cylinder is connected to the middle shield via a flange, the inner sliding cylinder is embedded inside the outer sliding cylinder, and the inner and outer sliding cylinders are connected by a push jack.

[0014] Furthermore, the sealing system is installed at the front of the inner slide cylinder, and the wear-resistant system is installed at the rear of the inner slide cylinder.

[0015] The beneficial effects of this utility model are:

[0016] 1. The sealing system of this utility model includes finger-shaped sealing rings and airbags disposed between the inner and outer sliding cylinders. The two circumferential finger-shaped sealing rings ensure the sealing performance of the inner and outer sliding cylinders. The airbags are inflated in emergencies as secondary protection, ensuring the sealing performance of the mating surfaces of the inner and outer sliding cylinders and the safety of construction. Multiple types and multi-layered combined sealing forms are designed for specific purposes. The adjustable airbag seal solves the problem of mud leakage between the inner and outer sliding cylinders. The wear-resistant system includes wear-resistant ring plates and wear-resistant strips. By setting wear-resistant ring plates and wear-resistant strips, the service life of the structure is effectively guaranteed. A combined wear-resistant plate is installed at the rear of the inner sliding cylinder to avoid rigid friction of the diameter when the inner and outer sliding cylinders slide, ensuring the safety and reliability of long-distance tunneling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the present invention;

[0019] Figure 2This is a schematic diagram of the sealing system of this utility model;

[0020] Figure 3 This is a schematic diagram of the wear-resistant system of this utility model.

[0021] In the diagram: Inner slide 1, outer slide 2, finger seal ring 3, air bladder 4, wear-resistant ring plate 5, wear-resistant strip 6, pressure block 7, mounting bracket 8, stop block 9, baffle 10, adjusting screw 11, sealing strip 12, and push jack 13. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0023] like Figures 1 to 3 As shown, a continuous tunneling shield machine sliding cylinder sealing and wear-resistant system includes a sealing system and a wear-resistant system disposed between an inner sliding cylinder 1 and an outer sliding cylinder 2. The sealing system includes finger-shaped sealing rings 3 and airbags 4 disposed between the inner sliding cylinder 1 and the outer sliding cylinder 2. The two circumferential finger-shaped sealing rings 3 ensure the sealing performance of the inner and outer sliding cylinders. The airbags 4 are inflated in emergencies as secondary protection to ensure the sealing performance of the mating surfaces of the inner and outer sliding cylinders and the safety of construction. Multiple types and multi-layered combined sealing forms are specifically designed, and the adjustable airbag seal solves the problem of mud leakage between the inner and outer sliding cylinders. The wear-resistant system includes wear-resistant ring plates 5 and wear-resistant strips 6. By setting the wear-resistant ring plates 5 and wear-resistant strips 6, the service life of the structure is effectively guaranteed. A combined wear-resistant plate is installed at the rear of the inner sliding cylinder to avoid rigid friction of the inner and outer sliding cylinders during sliding, ensuring the safety and reliability of long-distance tunneling.

[0024] like Figure 2 As shown, two finger-shaped sealing rings 3 are arranged side by side.

[0025] like Figure 2 As shown, pressure blocks 7 are provided between the finger-shaped sealing rings 3 and on the outside of the finger-shaped sealing rings 3 to press the finger-shaped sealing rings 3. The pressure blocks 7 are installed on the inner slide cylinder 1 by screws. The pressure blocks 7 press the two ends of the finger-shaped sealing rings 3 respectively, and the pressure blocks are tightened to prevent the seal from falling off.

[0026] like Figure 2 As shown, the inner slide cylinder 1 is provided with a mounting bracket 8 at its end. The mounting bracket 8 is fixed to the front end face of the inner slide cylinder 1 by screws, and the airbag 4 is disposed on the mounting bracket 8.

[0027] like Figure 2 As shown, the mounting bracket 8 has a stop block 9 at the front end and a baffle 10 at the rear side of the stop block 9. The stop block 9 is fixed to the front end of the mounting bracket 8 by screws. The stop block 9 is provided with an adjusting screw 11 for adjusting the position of the baffle 10. The adjusting screw 11 is used to adjust the position of the baffle 10 to press the airbag 4. The adjusting screw 11 passes through the stop block 9 and is threadedly connected to the stop block 9.

[0028] like Figure 2 As shown, a sealing strip 12 is installed between the front end face of the inner slide cylinder 1 and the mating surface of the mounting bracket 8 to ensure the sealing of the end face of the inner slide cylinder.

[0029] like Figure 3 As shown, the wear-resistant ring plate 5 and the wear-resistant strip 6 are both installed on the inner sliding cylinder 1 by screws. The wear-resistant ring plate is installed circumferentially on the middle section of the outer wall of the inner sliding cylinder 1 by screws, and the wear-resistant strip is installed circumferentially on the rear section of the outer wall of the inner sliding cylinder 1 by screws. The wear-resistant ring plate 5 and the wear-resistant strip 6 effectively protect the wear of the structural components and improve the service life of the tunnel boring machine.

[0030] like Figure 1 As shown, the outer sliding cylinder 2 of the tunnel boring machine is connected to the front shield via a flange, and the inner sliding cylinder 1 is connected to the middle shield via a flange. The inner sliding cylinder 1 is embedded inside the outer sliding cylinder 2, and the inner sliding cylinder 1 and the outer sliding cylinder 2 are connected by a propulsion jack 13. During operation, the inner sliding cylinder 1 and the outer sliding cylinder 2 achieve an extension and retraction function through the propulsion jack 13. When the propulsion jack extends, the inner sliding cylinder extends out from the outer sliding cylinder accordingly; when the propulsion jack retracts, the inner sliding cylinder retracts into the outer sliding cylinder accordingly, satisfying the construction condition of the continuous tunneling tunnel boring machine where the front advances while the rear remains relatively stationary.

[0031] like Figure 1 As shown, the sealing system is installed at the front of the inner slide cylinder 1, and the wear-resistant system is installed at the rear of the inner slide cylinder 1.

[0032] In the description of this utility model, it should be noted that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A sealing and wear-resistant system for a sliding cylinder of a continuous tunneling shield machine, comprising a sealing system and a wear-resistant system disposed between an inner sliding cylinder (1) and an outer sliding cylinder (2), characterized in that, The sealing system includes a finger-shaped sealing ring (3) and an air bladder (4) disposed between the inner slide (1) and the outer slide (2), and the wear-resistant system includes a wear-resistant ring plate (5) and a wear-resistant strip (6).

2. The continuous tunneling shield machine slide sealing and wear-resistant system as described in claim 1, characterized in that, The finger-shaped sealing rings (3) are provided in two parallel rows.

3. The continuous tunneling shield machine slide cylinder sealing and wear-resistant system as described in claim 2, characterized in that, Pressure blocks (7) for pressing down the finger seals (3) are provided between the finger seals (3) and on the outside of the finger seals (3).

4. The continuous tunneling shield machine slide cylinder sealing and wear-resistant system as described in claim 1, characterized in that, The inner slide (1) is provided with a mounting bracket (8) at its end, and the airbag (4) is mounted on the mounting bracket (8).

5. The continuous tunneling shield machine slide sealing and wear-resistant system as described in claim 4, characterized in that, The mounting bracket (8) has a stop block (9) at the front end and a baffle (10) at the rear side of the stop block (9). The stop block (9) has an adjusting screw (11) for adjusting the position of the baffle (10). The adjusting screw (11) is used to adjust the position of the baffle (10) to press the airbag (4).

6. The continuous tunneling shield machine slide sealing and wear-resistant system as described in claim 5, characterized in that, A sealing strip (12) is installed between the front end face of the inner slide cylinder (1) and the mating surface of the mounting bracket (8).

7. The continuous tunneling shield machine slide sealing and wear-resistant system as described in claim 1, characterized in that, The wear-resistant ring plate (5) and the wear-resistant strip (6) are both installed on the inner slide cylinder (1) by screws.

8. The continuous tunneling shield machine slide sealing and wear-resistant system as described in claim 1, characterized in that, The outer sliding cylinder (2) is connected to the front shield via a flange, and the inner sliding cylinder (1) is connected to the middle shield via a flange. The inner sliding cylinder (1) is embedded inside the outer sliding cylinder (2), and the inner sliding cylinder (1) and the outer sliding cylinder (2) are connected by a push jack (13).

9. The continuous tunneling shield machine slide sealing and wear-resistant system as described in claim 1, characterized in that, The sealing system is installed at the front of the inner slide (1), and the wear-resistant system is installed at the rear of the inner slide (1).

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