Hinged ring supporting device of shield tunneling machine and large-diameter passive hinged type shield tunneling machine

Abstract

The utility model discloses a shield tunneling machine hinged ring supporting device and a large-diameter passive hinged type shield tunneling machine, and solves the problems that when the large-diameter passive hinged type shield tunneling machine conducts tunneling in a large-burial-depth, high-water-pressure and long-distance stratum, due to stratum convergence and high water pressure, a shield tail hinged ring deforms under stress, and then sealing fails. The hinged ring supporting device of the shield tunneling machine comprises a hinged ring which is arranged on the front portion of a tail shield and matched with the tail portion of a middle shield, a supporting plate structure is fixed to the inner ring face of the hinged ring, and a circumferential anti-twisting block structure connected with the supporting plate structure is arranged between the tail shield and the middle shield. According to the supporting device for the hinged ring of the shield tunneling machine, the supporting plate structure is arranged at the hinged ring, so that the problems of deformation and sealing failure of the hinged ring of the shield tunneling machine caused by formation convergence and high water pressure when a passive hinged type shield tunneling machine is used for tunneling in a large-burial-depth, high-water-pressure and long-distance formation are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, in particular to an articulated ring supporting device for a shield machine and a large-diameter passive articulated shield machine. Background Art

[0002] With the development of science and technology and the continuous improvement of urbanization, tunnel construction is gradually moving towards greater depth and larger diameter. As the preferred equipment for urban tunnel projects, large-diameter shield machines will usher in a period of rapid development and be widely used because they can meet the construction needs of various complex strata, high water pressure, long distances, large depths, and large diameter tunnel projects.

[0003] As the diameter of the shield machine increases, the technical difficulty and cost of the shield equipment will also increase, and the price will be more expensive. Under the premise of meeting the turning radius of the tunnel, compared with the active articulation, the use of a passive articulated large-diameter shield can effectively reduce costs and have more advantages in market competition.

[0004] When the shield machine is constructed in a high water pressure and deep buried stratum, the shield tail hinge ring of the passive hinged shield machine is often the weakest part due to the lack of effective support structure inside the tail shield and hinge ring. And the larger the excavation diameter of the shield machine, the greater the deformation of the tail shield hinge ring. The stress deformation of the tail shield hinge ring will lead to a decrease in the compression of the seal, which will in turn affect the service life of the seal and cause a seal failure accident. In addition, the deformation of the hinge ring makes the tail shield float larger, resulting in uneven stress on the pipe segment, which is easy to damage the pipe segment.

[0005] In the current tunnel construction process, large-diameter passive articulated shield machines often solve sealing failure accidents by increasing the thickness of the articulated ring or by using high-cost active articulated shield machines to ensure the sealing quality of the articulated ring, such as an active articulated shield machine with independent extension and swing over-digging capabilities of the cutter head with publication number CN 110985020 A. Due to the high cost, the above two solutions are not good. The problem of poor sealing effect caused by deformation of the tail shield articulated ring is the main reason that restricts the use of passive articulation in large-diameter shield machines above 10 meters.

[0006] Therefore, there is an urgent need to provide a support device that has a simple occupancy structure, sufficient strength and stiffness, is safe and economical, is suitable for deep burial, long distance, and high water pressure strata pressure excavation construction, and ensures the stiffness and strength of the articulated ring of a large-diameter passive articulated shield machine. Utility Model Content

[0007] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a shield machine articulated ring support device and a large-diameter passive articulated shield machine, which solves the problem that when a large-diameter passive articulated shield machine is excavating in a deep buried, high water pressure and long distance stratum, the shield tail articulated ring is deformed due to the convergence of the stratum and the high water pressure, which leads to sealing failure.

[0008] The technical solution of the utility model is implemented as follows: a shield machine hinge ring support device includes a hinge ring arranged at the front of the tail shield and matched with the tail of the middle shield, a support plate structure is fixed on the inner ring surface of the hinge ring, and a circumferential anti-twist block structure connected to the support plate structure is provided between the tail shield and the middle shield.

[0009] Further preferably, the support plate structure comprises at least one support ring plate, an outer arc end of the support ring plate is fixedly connected to the hinge ring, and an inner arc end of the support ring plate is provided with a circular ring support plate.

[0010] Further preferably, the support plate structure includes two support ring plates, the two support ring plates are respectively a front support plate and a rear support plate, a plurality of reinforcing rib plates are circumferentially connected between the front support plate and the rear support plate, and the inner arc end of the front support plate and the inner arc end of the rear support plate are connected via a circular ring support plate.

[0011] Further preferably, the front support plate and the rear support plate are provided with a first through hole for the propulsion cylinder to pass through, a second through hole for the articulation cylinder to pass through, and a channel cooperating with the circumferential anti-twist block structure.

[0012] Further preferably, the circumferential anti-twist block structure includes a middle shield anti-twist block connected to the inner side of the middle shield tail portion and a tail shield anti-twist block arranged on the inner side of the tail shield front portion, and the middle shield anti-twist block is plug-fitted with the tail shield anti-twist block.

[0013] Specifically, the tail shield anti-twist block is a hollow cylindrical structure, the middle shield anti-twist block is a columnar structure, the tail shield anti-twist block is inserted into the support plate structure, and the middle shield anti-twist block is inserted into the tail shield anti-twist block and can slide relative to the tail shield anti-twist block. Preferably, a sealing airbag is provided between the hinge ring and the middle shield.

[0014] A large-diameter passive articulated shield machine comprises a shield body and a shield machine articulated ring supporting device arranged in the shield body.

[0015] The large-diameter passive articulated shield machine also includes a thrust cylinder, and the shield body includes a front shield, a middle shield and a rear shield; a M-beam is provided in the middle shield, and the thrust cylinder passes through the M-beam and the support plate structure in sequence; the fixed end of the thrust cylinder is connected to the rear partition of the front shield through a first base, the middle part of the thrust cylinder is connected to the middle shield through a floating support, and a boot plate is provided at the telescopic end of the thrust cylinder.

[0016] The large-diameter passive articulated shield machine also includes an articulated cylinder, which passes through the support plate structure, one end of the articulated cylinder is fixed to the M-beam through a second base, and the other end of the articulated cylinder is fixed to the tail shield through a support.

[0017] The beneficial effects of the utility model are as follows: the utility model solves the problem of deformation of the shield machine hinge ring and sealing failure caused by the convergence of the stratum and high water pressure when the passive articulated shield machine is excavated in a stratum with a large burial depth, high water pressure and long distance by providing a shield machine hinge ring support device formed by a support plate structure at the hinge ring. In addition, the shield machine hinge ring support device of this embodiment has a clever design structure, small space occupation, and high support strength. It can be well applied to the pressure excavation construction in strata with a large burial depth, high water pressure and long distance, effectively improving the reliability and efficiency of the shield machine construction, ensuring the sealing quality of the hinge ring, reducing product costs, and improving the economic benefits and market competitiveness of the enterprise.

[0018] The utility model provides a passive articulated shield machine using the above-mentioned articulated ring support device, which effectively improves the reliability and efficiency of the shield machine construction, optimizes the structure of the shield machine's articulated ring, ensures the sealing quality of the articulated ring, ensures the safe and efficient construction of the shield machine, greatly reduces equipment costs, effectively improves market competitiveness, and improves the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the arrangement of the hinged ring support device of the shield machine of the utility model in the shield machine.

[0021] Figure 2 This is the A-direction view of the hinged ring support device of the shield machine of the present invention.

[0022] Figure 3 It is a partial schematic diagram of the hinged ring support device of the shield machine of the utility model in Example 2.

[0023] Figure 4 for Figure 2 Middle BB view.

[0024] Figure 5 for Figure 4 Schematic diagram of the center C direction.

[0025] In the figure: 1-front shield, 101-rear partition, 2-middle shield, 3-tail shield, 4-M-beam, 5-hinge ring, 501-sealing airbag, 6-support plate structure, 601-front support plate, 602-rear support plate, 603-reinforcement rib plate, 604-circular support plate, 605-small rib plate, 608-first through hole, 606-second through hole, 607-channel, 7-passive articulated cylinder, 701-second base, 702-support, 8-thrust cylinder, 801-first base, 802-boot plate, 9-floating support, 10-circumferential anti-twist block structure, 1001-middle shield anti-twist block, 1002-tail shield anti-twist block, 11-pipe segment, 12-shield tail brush. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 2 As shown, in embodiment 1, a shield machine hinge ring support device includes a hinge ring 5 arranged at the front of the tail shield 3 and sleeved with the tail of the middle shield 2, and a sealing airbag 501 is arranged between the hinge ring 5 and the middle shield 2; the sealing airbag 501 can be arranged in one, two or more ways. In this embodiment, two sealing airbags are arranged as an example, and the hinge ring 5 is sealed by controlling the size of the airbag by high-pressure gas to prevent external slag and pressurized gas from entering the shield machine. A support plate structure 6 is fixed on the inner ring surface of the hinge ring 5, and the support plate structure 6 increases the stability and roundness of the hinge ring 5. A plurality of circumferential anti-twist block structures 10 connected to the support plate structure 6 are arranged between the tail shield 3 and the middle shield 2 along the circumferential direction; the setting of the circumferential anti-twist block structure 10 effectively plays the role of anti-twist of the tail shield. When the shield machine is in normal excavation, the support plate structure 6 ensures the roundness of the hinge ring of the shield machine, preventing the deformation of the hinge ring and the failure of the hinge seal. When the shield machine is excavating under pressure, the rigidity of the support plate structure 6 is large enough to effectively suppress the deformation of the hinge ring, ensure sufficient sealing compression of the sealing airbag 501, ensure the sealing quality of the hinge ring, and effectively extend the service life of the seal. At the same time, the existence of the support plate structure 6 improves the rigidity and stability of the tail shield 3, can significantly suppress the floating of the tail shield 3, ensure the gap between the pipe segment 11 and the shield tail brush 12, and more effectively protect the pipe segment 11, providing safety protection for excavation construction.

[0028] The support plate structure 6 in this embodiment includes at least one support ring plate, and the number of support ring plates can be 1, 2 or more as required to improve the support performance of the hinge ring. The outer arc end of the support ring plate is fixedly connected to the hinge ring 5, and the inner arc end of the support ring plate is provided with a circular support plate 604. The provision of the circular support plate 604 further improves the rigidity of the support plate structure 6.

[0029] like Figure 3 As shown, embodiment 2 is a shield machine hinge ring support device. Based on embodiment 1, this embodiment is further optimized. The support plate structure 6 in this embodiment includes two support ring plates with the same structure. The two support ring plates are respectively a front support plate 601 and a rear support plate 602. The front support plate 601 and the rear support plate 602 are welded at the front and rear positions of the hinge ring. A plurality of reinforcing ribs 603 are connected between the front support plate 601 and the rear support plate 602 along the circumferential direction; the reinforcing ribs 603 can be small ribs 605 and large ribs, and different positions are welded and fixed to improve the rigidity and strength of the support plate structure. The inner arc end of the front support plate 601 and the inner arc end of the rear support plate 602 are connected by a circular support plate 604; the circular support plate 604 is respectively welded and fixed to the front support plate 601, the rear support plate 602, the large ribs 603, and the small ribs 605; so as to improve the stability of the front support plate 601 and the rear support plate 602. The angle range of the support ring is not limited to 360°, and can be adjusted according to the ground conditions and the length of the shield hinge ring. At the same time, the change in the implementation structure caused by the change in the angle range due to the increase in the number of hinge ring support plates should be covered within the protection scope of the utility model.

[0030] In this embodiment, the front support plate 601 and the rear support plate 602 are provided with a first through hole 608 for the propulsion cylinder 8 to pass through, a second through hole 606 for the articulation cylinder 7 to pass through, and a channel 607 that matches the circumferential anti-twist block structure 10. The front support plate 601 and the rear support plate 602 provide certain support for the propulsion cylinder 8, the articulation cylinder 7 and the circumferential anti-twist block structure 10, and provide reinforcement support for the articulation ring to reduce the deformation of the articulation ring, so as to reduce the possibility of failure of the shield machine seal due to pressure excavation.

[0031] like Figure 4 , 5As shown, the circumferential anti-twist block structure 10 in this embodiment includes a middle shield anti-twist block 1001 connected to the inner side of the tail of the middle shield 2 and a tail shield anti-twist block 1002 arranged on the inner side of the front of the tail shield 3, and the middle shield anti-twist block 1001 is plugged and matched with the tail shield anti-twist block 1002. Specifically, the tail shield anti-twist block 1002 is a hollow cylindrical structure, the middle shield anti-twist block 1001 is a columnar structure, the tail shield anti-twist block 1002 is penetrated by the support plate structure 6, and the middle shield anti-twist block 1001 is plugged into the tail shield anti-twist block 1002 and can slide relative to the tail shield anti-twist block 1002. The tail shield anti-twist block 1002 passes through the channel 607 and cooperates with the middle shield anti-twist block 1001. The support plate structure 6 provides support for the tail shield anti-twist block 1002, and the tail shield anti-twist block 1002 uses the front support plate 601 and the rear support plate 602 as a load-bearing structure, which can reduce the influence of the tail shield anti-twist block 1002 on the deformation of the hinge ring 5, improve the rigidity and stability of the tail shield 3, and can significantly suppress the floating of the tail shield 3.

[0032] The above-mentioned shield machine articulated ring support device has an ingenious design structure, occupies a small space and has a high support strength. It can be well applied to pressurized tunneling construction in deep burial, high water pressure and long-distance strata, effectively improving the reliability and efficiency of shield machine construction, ensuring the sealing quality of the articulated ring, reducing product costs and improving the economic benefits and market competitiveness of the enterprise.

[0033] like Figure 1 As shown, in Example 3, a large-diameter passive articulated shield machine comprises a shield body and a shield machine articulated ring support device as described in Example 1 or 2 arranged in the shield body. The large-diameter passive articulated shield machine also comprises a propulsion cylinder 8, and the shield body comprises a front shield 1, a middle shield 2 and a rear shield 3; a crossbeam 4 is arranged in the middle shield 2, and the propulsion cylinder 8 passes through the crossbeam 4 and the support plate structure 6 in sequence; the fixed end of the propulsion cylinder 8 is connected to the rear partition 101 of the front shield 1 through a first base 801, and the middle part of the propulsion cylinder 8 is connected to the middle shield 2 through a floating support 9, and a boot plate 802 is arranged at the telescopic end of the propulsion cylinder 8. During normal excavation of the shield machine, the rear end of the thrust cylinder 8 is welded and fixed to the rear partition 101 of the front shield 1 through the first base 801, and is connected to the M-beam 4 by the floating support 9. The front end of the thrust cylinder 8 passes through the hinged ring support device 6, and a boot plate 802 is installed on the head. The thrust cylinder boot plate 802 is pressed on the pipe segment 11, and the extension of the thrust cylinder 8 realizes the propulsion of the shield machine.

[0034] As an implementation mode, the large-diameter passive articulated shield machine in this embodiment further includes an articulated oil cylinder 7, which passes through the support plate structure 6, one end of which is fixed to the M-shaped beam 4 through the second base 701, and the other end of which is fixed to the tail shield 3 through the support 702. The rear end of the articulated oil cylinder 7 is welded and fixed to the M-shaped beam 4 through the second base 701, and the articulated oil cylinder 7 passes through the articulated ring support plate structure 6, and the front end is connected to the tail shield 3 through the support 702, and the turning of the shield machine is realized.

[0035] The passive articulated shield machine using the above-mentioned articulated ring support device can achieve the reinforcement of the articulated ring, reduce the deformation of the articulated ring, effectively improve the reliability and efficiency of the shield machine construction, optimize the structure of the articulated ring of the shield machine, ensure the sealing quality of the articulated ring, reduce product costs, and improve the economic benefits and market competitiveness of the enterprise. During the production, transportation, and assembly of the shield machine, the support device can effectively improve the rigidity of the tail shield body and reduce the impact of the deformation of the tail shield itself on the integrity of the equipment. According to actual construction needs, a large-diameter shield can adopt a passive articulated solution with an articulated ring support device to solve the problem of articulated ring sealing failure, ensure the safe and efficient construction of the shield machine, significantly reduce equipment costs, effectively improve market competitiveness, and improve the economic benefits of the enterprise.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shield machine hinge ring support device, comprising a hinge ring (5) arranged at the front of a tail shield (3) and cooperating with the tail of a middle shield (2), characterized in that: A support plate structure (6) is fixed on the inner ring surface of the hinge ring (5), and a circumferential anti-twist block structure (10) connected to the support plate structure (6) is provided between the tail shield (3) and the middle shield (2).

2. The shield machine hinge ring support device according to claim 1, characterized in that: The support plate structure (6) comprises at least one support ring plate, the outer arc end of the support ring plate is fixedly connected to the hinge ring (5), and the inner arc end of the support ring plate is provided with a circular ring support plate (604).

3. The shield machine hinge ring support device according to claim 1 or 2, characterized in that: The support plate structure (6) comprises two support ring plates, the two support ring plates being respectively a front support plate (601) and a rear support plate (602); a plurality of reinforcing rib plates (603) are connected circumferentially between the front support plate (601) and the rear support plate (602); the inner arc end of the front support plate (601) and the inner arc end of the rear support plate (602) are connected via a circular ring support plate (604).

4. The shield machine hinge ring support device according to claim 3, characterized in that: The front support plate (601) and the rear support plate (602) are provided with a first through hole (608) for the propulsion cylinder (8) to pass through, a second through hole (606) for the articulation cylinder (7) to pass through, and a channel (607) that cooperates with the circumferential anti-twist block structure (10).

5. The shield machine hinge ring support device according to claim 1 or 4, characterized in that: The circumferential anti-twist block structure (10) comprises a middle shield anti-twist block (1001) connected to the inner side of the rear portion of the middle shield (2) and a tail shield anti-twist block (1002) arranged on the inner side of the front portion of the tail shield (3); the middle shield anti-twist block (1001) and the tail shield anti-twist block (1002) are plug-fitted.

6. The shield machine hinge ring support device according to claim 5, characterized in that: The tail shield anti-twist block (1002) is a hollow cylindrical structure, the middle shield anti-twist block (1001) is a columnar structure, the tail shield anti-twist block (1002) is inserted into the support plate structure (6), and the middle shield anti-twist block (1001) is inserted into the tail shield anti-twist block (1002) and can slide relative to the tail shield anti-twist block (1002).

7. The shield machine hinge ring support device according to claim 1, characterized in that: A sealing air bag (501) is provided between the hinge ring (5) and the middle shield (2).

8. A large diameter passive articulated shield machine, characterized in that: It comprises a shield body and a shield machine hinge ring support device as claimed in any one of claims 1 to 7 arranged in the shield body.

9. The large-diameter passive articulated shield machine according to claim 8, characterized in that: It also includes a propulsion cylinder (8), and the shield body includes a front shield (1), a middle shield (2) and a rear shield (3); a M-shaped beam (4) is provided in the middle shield (2), and the propulsion cylinder (8) passes through the M-shaped beam (4) and the support plate structure (6) in sequence; the fixed end of the propulsion cylinder (8) is connected to the rear partition (101) of the front shield (1) through a first base (801), the middle part of the propulsion cylinder (8) is connected to the middle shield (2) through a floating support (9), and a boot plate (802) is provided at the telescopic end of the propulsion cylinder (8).

10. The large-diameter passive articulated shield machine according to claim 9, characterized in that: It also includes an articulated oil cylinder (7), which passes through the support plate structure (6), one end of the articulated oil cylinder (7) is fixed to the M-shaped beam (4) through a second base (701), and the other end of the articulated oil cylinder (7) is fixed to the tail shield (3) through a support (702).

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