A steel ring installation device for a shield tunnel

Abstract

This utility model discloses a steel ring installation device for shield tunnels, including an annular guide frame with an annular path, a traveling mechanism disposed on the annular guide frame for driving the annular guide frame to move within the tunnel, and a movable support frame movably disposed on the annular guide frame. This steel ring installation device for shield tunnels, through a novel design combining an annular guide frame and a movable support frame, achieves automated and precise installation of steel rings in shield tunnels. The entire device uses the annular guide frame as its base platform, and the traveling mechanism allows for flexible movement and positioning within the tunnel, providing a stable working foundation for steel ring installation. The movable support frame, disposed on the annular guide frame, can perform 360-degree circular motion along a preset annular path, and the drive component controls this circular motion, enabling the device to accurately reach any installation position on the tunnel cross-section.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a steel ring installation device for shield tunnels. Background Technology

[0002] A shield tunnel is a tunnel structure constructed using the shield tunneling method, a type of cut-and-cover method. It is a fully mechanized operation widely used in the construction of tunnels for urban subways, highways, and railways. During construction, the shield machine continuously advances through the ground, simultaneously completing tasks such as soil excavation, spoil removal, and segment assembly, thus achieving steady tunnel progress.

[0003] In shield tunnels, in order to enhance the stability, waterproofing and durability of the tunnel structure, steel ring structures are usually installed at the joints, such as segment connection steel rings and water-stop steel rings. These steel rings are usually made of multiple arc-shaped steel plates welded or spliced ​​together, which puts high demands on the positioning accuracy and installation efficiency of the arc-shaped steel plates.

[0004] Currently, the installation of curved steel plates mostly relies on manual labor in conjunction with simple hoisting equipment. Due to the limited working space inside tunnels and the fact that the ground is mostly curved or sloping, existing hoisting devices have insufficient load-bearing capacity and poor stability. This causes the curved steel plates to easily sway, shift, or even fall during installation. As a result, operators often need to perform frequent manual alignment and fine-tuning, which increases operational risks and significantly prolongs installation time, seriously affecting construction progress and efficiency. In addition, traditional steel plate installation devices are mostly fixed structures, lacking flexible movement mechanisms, making it difficult to adapt to complex construction environments and the needs of multi-position operations, further limiting their practicality.

[0005] Therefore, there is an urgent need for a shield tunnel steel ring installation device that is structurally stable, easy to move, and capable of rapid and precise installation of curved steel plates, in order to improve installation efficiency, reduce construction risks, and meet the needs of modern tunnel engineering. Summary of the Invention

[0006] The purpose of this invention is to provide a steel ring installation device for shield tunnels, which can stably install steel rings.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a ring-shaped guide frame having a ring-shaped path;

[0008] A traveling mechanism, mounted on the annular guide frame, is used to drive the annular guide frame to move within the tunnel;

[0009] The movable support frame is movably mounted on the annular guide frame and is capable of circular motion along the annular path;

[0010] A drive assembly is disposed between the annular guide frame and the movable support frame, for driving the movable support frame to move along the annular path;

[0011] An adjustment component is provided on the movable support frame;

[0012] A connecting frame is connected to the movable support frame via the adjusting component, the adjusting component being used to adjust the position of the connecting frame relative to the movable support frame;

[0013] A locking mechanism is provided on the connecting frame and is used to lock and fix the arc-shaped steel plate.

[0014] Preferably, the annular guide frame includes a first annular mounting frame and a second annular mounting frame, the first annular mounting frame and the second annular mounting frame are arranged in parallel and fixedly connected by a connecting structure, and the annular path is formed by the annular space formed by the inner sides of the first annular mounting frame and the second annular mounting frame.

[0015] Preferably, the inner sides of the first and second annular mounting brackets are provided with guide grooves, and the four corners of the movable support frame are provided with mounting shafts, each mounting shaft having a roller rotatably mounted on it, the roller sliding within the guide groove.

[0016] Preferably, the adjustment assembly includes multiple worm gear lifting mechanisms, which are distributed and installed on the movable support frame, and the connecting frame is fixed to the telescopic end of the worm gear lifting mechanism.

[0017] Preferably, the connecting locking mechanism includes connecting plates disposed at both ends of the connecting frame and connecting bolts threadedly mounted on the connecting plates. The arc-shaped steel plate is provided with threaded holes that mate with the connecting bolts. One end of the connecting bolt is threadedly engaged with the threaded holes, and the other end of the connecting bolt is provided with a locking nut.

[0018] Preferably, the drive assembly includes a drive motor mounted on the movable support frame;

[0019] Multiple U-shaped frames are evenly distributed along the annular path on the annular guide frame;

[0020] A chain, which is fitted onto the U-shaped frame;

[0021] A rack is fixed on each of the U-shaped frames and engages with the chain. A second sprocket is installed at the output end of the drive motor. The lower end of the second sprocket meshes with the inner side of the chain. The drive motor drives the chain through the second sprocket, causing the movable support frame to move along a circular path.

[0022] U-shaped limiting plates, which are fixed on each of the U-shaped frames, are used to limit the displacement of the chain.

[0023] Preferably, a first mounting frame is fixedly installed on one side of the movable support frame, and a second mounting frame is fixedly installed on the other side of the movable support frame. A first sprocket is rotatably installed inside the first mounting frame, and a third sprocket is rotatably installed inside the second mounting frame. The second sprocket is located between the first sprocket and the third sprocket. The chain passes around the first sprocket, the second sprocket, and the third sprocket in sequence. The first sprocket and the third sprocket engage with the outer side of the chain, and the second sprocket engages with the inner side of the chain.

[0024] Preferably, the traveling mechanism includes a first support frame installed at both ends of the annular guide frame, with a drive wheel mechanism on one side of the first support frame and a moving wheel on the other side of the first support frame.

[0025] Compared with existing technologies, the advantages of this invention are as follows: This steel ring installation device adopts a novel design combining a ring-shaped guide frame and a movable support frame, realizing automated and precise installation of steel rings in shield tunnels. The entire device uses the ring-shaped guide frame as its base platform, and can flexibly move and position itself within the tunnel via a traveling mechanism, providing a stable working foundation for steel ring installation. The movable support frame is mounted on the ring-shaped guide frame and can perform 360-degree circular motion along a preset ring path. The drive component controls this circular motion process, enabling the device to accurately reach any installation position on the tunnel cross-section.

[0026] During actual installation, the curved steel plate is pre-fixed to the connecting frame via a locking mechanism, forming a complete installation unit. Once the moving support frame reaches the designated installation position, the crucial installation action is performed by the adjusting component. This component drives the connecting frame, along with the fixed curved steel plate, to push it outwards, moving the curved steel plate to its final installation position on the tunnel wall. This ensures both the accuracy of the installation position and a tight fit between the steel plate and the tunnel wall. The entire device, through a combination of ring-shaped motion positioning, radial push-out installation, and reliable locking, significantly improves the automation and construction efficiency of shield tunnel steel ring installation, providing crucial technical support for the standardization and intelligentization of shield tunneling. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a steel ring installation device for shield tunnels;

[0028] Figure 2 This is a rear-view three-dimensional structural diagram of a steel ring installation device for shield tunnels;

[0029] Figure 3This is an exploded three-dimensional structural diagram of a steel ring installation device for shield tunnels;

[0030] Figure 4 This is a cross-sectional three-dimensional structural diagram of a steel ring installation device for shield tunnels;

[0031] Figure 5 This is a cross-sectional three-dimensional structural diagram of a steel ring installation device for shield tunnels;

[0032] Figure 6 for Figure 1 Enlarged view of point A in the middle;

[0033] Figure 7 for Figure 2 Enlarged view of point B in the middle.

[0034] In the diagram: 1. Circular guide frame; 2. First circular mounting frame; 3. Second circular mounting frame; 4. Traveling mechanism; 41. First support frame; 42. Drive wheel mechanism; 43. Moving wheel; 5. Guide groove; 6. Moving support frame; 7. Mounting shaft; 8. Roller; 9. Adjustment assembly; 91. Worm gear lifting mechanism; 92. Connecting frame; 93. Connecting plate; 94. Connecting bolt; 95. Arc-shaped steel plate; 10. Drive assembly; 101. U-shaped frame; 102. Chain; 103. Rack; 104. U-shaped limit plate; 105. Drive motor; 106. First mounting frame; 107. Second mounting frame; 108. First sprocket; 109. Second sprocket; 110. Third sprocket. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0036] like Figure 1-3 As shown, a steel ring installation device for shield tunnels includes an annular guide frame 1, which has an annular path. The annular guide frame 1 includes a first annular mounting frame 2 and a second annular mounting frame 3, which are arranged in parallel and fixedly connected by a connecting structure. The annular path is formed by an annular space formed by the inner sides of the first annular mounting frame 2 and the second annular mounting frame 3.

[0037] The first annular mounting frame 2 and the second annular mounting frame 3 not only provide a solid support foundation for the entire device, but their annular structure can also be adapted to the curved inner wall of the tunnel, reducing the risk of the device colliding with the tunnel during operation. At the same time, they effectively disperse the load generated during hoisting and movement, enhancing the stability of the device when operating inside the tunnel.

[0038] like Figure 1-3As shown, a traveling mechanism 4 is provided on the first annular mounting frame 2 and the second annular mounting frame 3. The traveling mechanism 4 includes a first support frame 41 fixedly installed on both sides of the lower end of the first annular mounting frame 2 and the second annular mounting frame 3. The two first support frames 41 are made of high-strength alloy steel. A set of drive wheel mechanism 42 is installed on one side of the lower end of each first support frame 41, and a corresponding moving wheel 43 is installed on the other side of the first support frame 41, forming a symmetrical moving support structure. This symmetrical design can make the device evenly stressed when moving and avoid tilting. When the motor on the drive wheel mechanism 42 starts, it will drive the drive wheel to rotate, and then drive the entire device to move smoothly in the tunnel through friction. Since the drive wheel mechanism 42 is a mature existing technology, it will not be described in detail here.

[0039] like Figure 3-4 As shown, the movable support frame 6 is movably mounted on the annular guide frame 1 and can move in a circular path. The movable support frame 6 is also made of high-strength steel and is assembled by welding, resulting in a sturdy and durable overall structure. Guide grooves 5 are provided on the inner sides of the first annular mounting frame 2 and the second annular mounting frame 3. The cross-section of the guide grooves 5 is U-shaped, and the edges are ground to ensure a smooth, burr-free surface.

[0040] Meanwhile, mounting shafts 7 are fixedly installed at the four corners of the outer wall of the movable support frame 6. The mounting shafts 7 are welded to the movable support frame 6, ensuring a firm connection. Each mounting shaft 7 is rotatably mounted with a roller 8. The rollers 8 are made of wear-resistant cast iron and have undergone surface quenching treatment, resulting in high hardness and good wear resistance. These rollers 8 are slidably installed in the guide grooves 5, allowing the movable support frame 6 to move smoothly in a ring along the guide grooves 5 on the first annular mounting frame 2 and the second annular mounting frame 3, facilitating the docking and installation of various parts of the steel ring.

[0041] like Figure 4-5 As shown, the adjustment component 9 is disposed on the movable support frame 6. The adjustment component 9 includes a connecting frame 92, which is connected to the movable support frame 6. The adjustment component 9 is used to adjust the position of the connecting frame 92 relative to the movable support frame 6. Multiple worm gear lifting mechanisms 91 are fixedly installed on the movable support frame 6. The multiple worm gear lifting mechanisms 91 are distributed and installed at the four corners of the support frame. The connecting frame 92 is fixed to the telescopic end of the worm gear lifting mechanism 91.

[0042] The worm gear lifting mechanism 91 has a self-locking function, which can be firmly locked after being adjusted to the designated position to prevent the curved steel plate 95 from falling accidentally, thus improving the safety of the lifting operation. The connecting frame 92 is made of steel plate bent into shape and is fixedly connected to the lifting worm gear with bolts, which facilitates later maintenance and replacement.

[0043] A connecting locking mechanism, mounted on the connecting frame 92, is used to lock and fix the arc-shaped steel plate 95. The connecting locking mechanism includes connecting plates 93 located at both ends of the connecting frame 92. The connecting plates 93 are welded to the connecting frame 92 to ensure connection strength. Connecting bolts 94 are threaded onto the connecting plates 93. The connecting bolts 94 are high-strength bolts with good tensile strength and toughness.

[0044] At the lower end of the mobile support frame 6, an arc-shaped steel plate 95 is provided to form a steel ring. The arc-shaped steel plate 95 is customized according to the diameter of the tunnel, and its curvature matches the curvature of the tunnel's inner wall. Threaded holes matching the connecting bolts 94 are pre-set on the arc-shaped steel plate 95. Through the threaded connection between the connecting bolts 94 and the threaded holes, the arc-shaped steel plate 95 can be firmly fixed, thereby achieving stable hoisting of the arc-shaped steel plate 95. Multiple arc-shaped steel plates 95 can be welded together to form a complete steel ring. The worm gear lifting mechanism 91 can drive the arc-shaped steel plate 95 to perform smooth telescopic operations. The telescopic speed can be adjusted by controlling the motor speed to meet the needs of different installation heights. Since the worm gear lifting mechanism 91 is a mature existing technology, it will not be described in detail here.

[0045] like Figure 6-7 As shown, the drive assembly 10 provides powerful propulsion for the circular movement of the movable support frame 6. It mainly consists of a drive motor 105 and a chain 102. The drive motor 105 is a servo motor, which has advantages such as high control precision, stable operation, and fast response speed. It can control the moving speed and position of the movable support frame 6. The drive motor 105 is firmly mounted on the movable support frame 6, and a shock-absorbing pad is provided between the drive motor 105 and the movable support frame 6 to effectively reduce the vibration generated during motor operation and minimize the impact on other components of the device.

[0046] Between the first annular mounting frame 2 and the second annular mounting frame 3, multiple U-shaped frames 101 are fixedly installed. The U-shaped frames 101 are made of stamped steel plates and are evenly distributed between the annular mounting frames to support the chain 102. The chain 102 is fitted into the middle of these U-shaped frames 101, and a rack 103 is fixedly installed on each U-shaped frame 101. The rack 103 is welded and fixedly connected to the U-shaped frame 101. The rack 103 matches the tooth shape of the chain 102, and the chain 102 and the rack 103 are engaged. The rack 103 is fixedly installed at an angle to limit and fix the chain 102. U-shaped limiting plates 104 are fixedly installed on both sides of the rack 103 on the U-shaped frame 101 to prevent the chain 102 from shifting or falling off during movement, ensuring the stability of the transmission.

[0047] A first mounting frame 106 is fixedly installed on one side of the movable support frame 6, and a second mounting frame 107 is fixedly installed on the other side. Both the first mounting frame 106 and the second mounting frame 107 are welded from steel, resulting in a robust structure. A first sprocket 108 is rotatably mounted inside the first mounting frame 106, and a second sprocket 109 is fixedly mounted at the output end of the drive motor 105. A third sprocket 110 is rotatably mounted inside the second mounting frame 107. All sprockets are made of 45# steel and have undergone heat treatment, giving them high strength and wear resistance.

[0048] Furthermore, the second sprocket 109 is located at the lower end of the middle of the first sprocket 108 and the third sprocket 110. During transmission, one side of the first sprocket 108 is engaged with the outer side of the chain 102, the lower end of the second sprocket 109 is engaged with the inner side of the chain 102, and the side of the third sprocket 110 that is close to the second sprocket 109 is engaged with the outer side of the chain 102. This multi-sprocket engagement method can increase the contact area between the chain 102 and the sprockets, improve transmission efficiency, and at the same time make the chain 102 more evenly stressed, thus extending the service life of the chain 102.

[0049] When the drive motor 105 starts and drives the second sprocket 109 to rotate counterclockwise, the meshing transmission between the sprocket and the chain 102, and the engagement of the chain 102 with the obliquely mounted rack 103 through the gap, can provide a reverse pulling force on the chain 102, thereby limiting the chain 102 and preventing it from sliding on the U-shaped frame 101. When the second sprocket 109 rotates, it can drive the movable support frame 6 to move in a circle along the first annular mounting frame 2 and the second annular mounting frame 3. When the movable support frame 6 moves to any corresponding U-shaped frame 101, due to the second sprocket 109 There is a certain gap between the mobile support frame 6 and the U-shaped frame 101, so the chain 102 that is engaged with the rack 103 on the corresponding U-shaped frame will be lifted, so that the rack 103 releases the restriction on the chain 102. The moved mobile support frame 6 will cause the chain 102 on the U-shaped frame 101 to move closer to the rack 103, so that the chain 102 is engaged with the rack 103, and then the chain 102 is restricted again. This cycle repeats, thereby driving the mobile support frame 6 to move in a circle along the first annular mounting frame 2 and the second annular mounting frame 3, completing the hoisting and docking of the arc-shaped steel plate 95, which facilitates the welding and installation of the entire steel ring.

[0050] The operator fixes the customized curved steel plate 95 (the curvature matches the inner wall of the tunnel) to the connecting plate 93 of the connecting locking mechanism with connecting bolts 94. The pre-set threaded hole of the curved steel plate 95 is threadedly connected to the high-strength connecting bolts 94 on the connecting plate 93, so that the curved steel plate 95 is firmly fixed under the connecting frame 92, completing the fixation before hoisting.

[0051] The drive wheel mechanism 42 of the traveling mechanism 4 is activated, and the motor drives the drive wheel to rotate. Under the action of friction, the device moves stably in the tunnel through the support legs until it reaches the steel ring installation position.

[0052] According to the installation height requirements, the worm gear lifting mechanism 91 at the four corners of the mobile support frame 6 is controlled to operate. The lifting worm drives the connecting frame 92 and the arc-shaped steel plate 95 to extend and retract smoothly. After reaching the position, the self-locking function is used to lock it to prevent accidental falling.

[0053] The servo motor of the drive assembly 10 is started, which drives the second sprocket 109 to rotate. Through the engagement of the chain 102 with the rack 103 on the U-shaped frame 101 (the U-shaped limiting plate 104 prevents the chain 102 from deviating), the moving support frame 6 is driven to move in a circle along the guide grooves 5 of the first annular mounting frame 2 and the second annular mounting frame 3 (the roller 8 slides in the guide groove 5 to assist in guidance). During the movement, after the chain 102 disengages from the rack 103 of the current U-shaped frame 101, it will re-engage with the rack 103 of the next U-shaped frame 101 at a new position to achieve stable circular motion.

[0054] The mobile support frame 6 moves the arc-shaped steel plate 95 to the designated splicing position. The height is finely adjusted via the worm gear lifting mechanism 91 to precisely align the arc-shaped steel plate 95 with the already installed one, and then it is fixed by welding. After installation, the locking nut is loosened and the connecting bolt 94 is rotated in the reverse direction, causing the connecting bolt 94 to exit from the threaded hole of the arc-shaped steel plate 95 and separate from the steel plate. The device can then be removed for the next round of installation. It is particularly noteworthy that the pre-drilled threaded holes on the arc-shaped steel plate 95 can be used for subsequent grouting processes after the device is disassembled, facilitating the sealing and reinforcement of the tunnel. This process is repeated, with multiple arc-shaped steel plates 95 being hoisted and welded sequentially, ultimately splicing together to form a complete steel ring.

[0055] The basic principles, main features, and advantages of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steel ring installation device for shield tunnels, characterized in that, include The annular guide frame (1) has an annular path; The traveling mechanism (4) is mounted on the annular guide frame (1) and is used to drive the annular guide frame (1) to move within the tunnel; The movable support frame (6) is movably mounted on the annular guide frame (1) and can move in a circle along the annular path; A drive assembly (10) is disposed between the annular guide frame (1) and the movable support frame (6) for driving the movable support frame (6) to move along the annular path; Adjustment component (9) is disposed on the movable support frame (6); The connecting frame (92) is connected to the movable support frame (6) via the adjusting component (9), and the adjusting component (9) is used to adjust the position of the connecting frame (92) relative to the movable support frame (6); A connecting locking mechanism is provided on the connecting frame (92) for locking and fixing the arc-shaped steel plate (95).

2. The steel ring installation device for shield tunnels according to claim 1, characterized in that: The annular guide frame (1) includes a first annular mounting frame (2) and a second annular mounting frame (3). The first annular mounting frame (2) and the second annular mounting frame (3) are arranged in parallel and fixedly connected by a connecting structure. The annular path is formed by the annular space formed by the inner sides of the first annular mounting frame (2) and the second annular mounting frame (3).

3. A steel ring installation device for shield tunnels according to claim 2, characterized in that: The first annular mounting bracket (2) and the second annular mounting bracket (3) are provided with guide grooves (5) on their inner sides. The four corners of the movable support bracket (6) are provided with mounting shafts (7). Each mounting shaft (7) is rotatably mounted with a roller (8), which slides in the guide groove (5).

4. A steel ring installation device for shield tunnels according to claim 1, characterized in that: The adjustment assembly (9) includes multiple worm gear lifting mechanisms (91), which are distributed and installed on the movable support frame (6). The connecting frame (92) is fixed to the telescopic end of the worm gear lifting mechanism (91).

5. A steel ring installation device for shield tunnels according to claim 4, characterized in that: The connecting locking mechanism includes connecting plates (93) at both ends of the connecting frame (92) and connecting bolts (94) threaded on the connecting plates (93). The arc-shaped steel plate (95) is provided with threaded holes that cooperate with the connecting bolts (94). One end of the connecting bolts (94) is threadedly engaged with the threaded holes, and the other end of the connecting bolts (94) is provided with locking nuts.

6. A steel ring installation device for shield tunnels according to claim 1, characterized in that: The drive assembly (10) includes a drive motor (105) mounted on the movable support frame (6); Multiple U-shaped frames (101) are evenly distributed along the annular path on the annular guide frame (1); A chain (102) is fitted onto the U-shaped frame (101); A rack (103) is fixed on each of the U-shaped frames (101) and engages with the chain (102). A second sprocket (109) is installed at the output end of the drive motor (105). The lower end of the second sprocket (109) is meshed with the inner side of the chain (102). The drive motor (105) drives the chain (102) through the second sprocket (109), thereby causing the movable support frame (6) to move along a circular path. U-shaped limiting plates (104) are fixed on each of the U-shaped frames (101) to limit the displacement of the chain (102).

7. A steel ring installation device for shield tunnels according to claim 6, characterized in that: A first mounting frame (106) is fixedly installed on one side of the movable support frame (6), and a second mounting frame (107) is fixedly installed on the other side of the movable support frame (6). A first sprocket (108) is rotatably installed inside the first mounting frame (106), and a third sprocket (110) is rotatably installed inside the second mounting frame (107). The second sprocket (109) is located between the first sprocket (108) and the third sprocket (110). The chain (102) passes around the first sprocket (108), the second sprocket (109) and the third sprocket (110) in sequence. The first sprocket (108) and the third sprocket (110) mesh with the outer side of the chain (102), and the second sprocket (109) meshes with the inner side of the chain (102).

8. A steel ring installation device for shield tunnels according to claim 1, characterized in that: The traveling mechanism (4) includes a first support frame (41) installed at both ends of the annular guide frame (1), a drive wheel mechanism (42) is provided on one side of the first support frame (41), and a moving wheel (43) is provided on the other side of the first support frame (41).

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