Duct piece rotating tray device for shield launching in narrow cavern

Abstract

A duct piece rotating tray device for shield launching in a narrow cavern comprises a base and a tray, rolling wheels are arranged at the bottom of the base, a plane thrust bearing and a bull eye bearing are arranged at the top of the base, and a clamping pin matched with the plane thrust bearing is arranged at the bottom of the tray. The clamping pin is connected to the plane thrust bearing in an inserted mode so that the tray can be arranged on the base in a rotating mode, and the bull eye bearing is supported at the bottom of the tray. The device can be used in a shield launching stage, can meet the requirements of transporting and rotating the duct pieces in a narrow construction environment when the height is limited, and does not need to rotate the duct pieces through a large mechanical hoisting device, so that the space for installing the duct pieces is reduced, the difficulty of installing the duct pieces in a narrow space range is reduced, and the splicing efficiency of the duct pieces is improved; and through the arrangement of the bull eye bearing and the plane thrust bearing, friction force can be greatly reduced in the rotating process of the duct piece, and the beneficial effects of saving labor and being efficient are achieved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine (TBM) construction machinery, and in particular to a segment rotating pallet device for TBM launching in narrow tunnels. Background Technology

[0002] With the continuous progress of my country's transportation infrastructure construction, tunnel boring machine (TBM) technology has become increasingly mature and is gradually becoming the preferred construction method for urban subway construction and water resource allocation projects. Segment splicing, as one of the key processes in TBM tunneling, makes segment transportation particularly important during the segment assembly stage.

[0003] During the segmented launching process of the tunnel boring machine in a narrow tunnel, the limited launching space and compact layout make it difficult to install the trolley and restrict the height of the tunnel segments. This makes the transportation of the tunnel segments difficult. In addition, after the tunnel segments are transported to the predetermined position, it is difficult to rotate the tunnel segments manually or by machine, which carries the risk of scratching and makes it difficult to achieve the rotation and positioning installation of the tunnel segments, thus seriously affecting the efficiency of tunnel segment splicing. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a segment rotation tray device for shield tunneling in narrow tunnels. This device can meet the transportation and rotation operations of segments in the narrow space of shield tunneling, thereby improving the segment splicing efficiency.

[0005] To achieve the above objectives, the present invention provides a segment rotation tray device for shield tunneling in narrow tunnels. The segment rotation tray device includes a base and a tray. The bottom of the base is provided with rollers, and the top of the base is provided with a planar thrust bearing and a bullseye bearing. The bottom of the tray is provided with a locking pin adapted to the planar thrust bearing. The tray is rotatably mounted on the base by inserting the locking pin into the planar thrust bearing, and the bullseye bearing is supported on the bottom of the tray.

[0006] As a further improvement of this utility model, multiple bullseye bearings are provided, and the multiple bullseye bearings are arranged in a circumferential and equally spaced manner with the planar thrust bearing as the center.

[0007] As a further improvement of this utility model, the bullseye bearing is provided with 8 bearings, and the circumferential arrangement radius of the 8 bullseye bearings is 60cm.

[0008] As a further improvement of this utility model, a gap of 2mm is left between the bullseye bearing and the tray.

[0009] As a further improvement of this utility model, an anti-disengagement ring is also provided between the locking pin and the planar thrust bearing.

[0010] As a further improvement of this utility model, the base is provided with lifting lugs.

[0011] As a further improvement of this utility model, the top of the tray is provided with segment support feet on opposite sides, and a segment support surface adapted to the outer wall of the segment is formed between the two segment support feet on both sides.

[0012] As a further improvement of this utility model, the segment support is made of rubber, the segment support has a wedge-shaped structure, and the inclination angle of the segment support is 10°.

[0013] As a further improvement of this utility model, it also includes bolts, the segment support leg is provided with a strip groove, the tray is provided with a screw hole, and the bolt is adjustablely inserted through the strip groove and connected to the screw hole, so that the segment support leg is adjustablely positioned on the tray.

[0014] As a further improvement of this utility model, the overall height of the segment rotating tray device is no higher than 30cm.

[0015] The beneficial effects of this utility model are as follows: The device described in this utility model can be used in the shield tunneling initial stage, ensuring that the needs of segment transportation and rotation are met in narrow construction environments and when height is limited, even when the shield machine's own segment trolley cannot be installed. It eliminates the need for large mechanical hoisting devices to rotate the segments, reducing the space required for segment installation operations, lowering the difficulty of segment installation in confined spaces, and improving segment splicing efficiency. In addition, the device, through the setting of bullseye bearings and planar thrust bearings, can significantly reduce friction during segment rotation, exhibiting the characteristics of labor saving and high efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional exploded view of the segment rotating tray device;

[0017] Figure 2 This is a side view of the segment rotating tray device after disassembly.

[0018] Figure 3 This is a side view of the segment rotating tray device;

[0019] Marking description: Base 1, Roller 11, Lifting lug 12, Surface thrust bearing 13, Bullseye bearing 14, Tray 2, Locking pin 21, Anti-detachment ring 22, Segment support leg 23, Segment support surface 24, Strip groove 25, Bolt 26. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0021] like Figure 1-3As shown, a segment rotation pallet device for shield tunneling starting in a narrow tunnel includes a base 1 and a pallet 2.

[0022] The base 1 is a rectangular steel plate with a length of 3m, a width of 1.5m, and a thickness of 2cm. Rollers 11 are installed at the four corners of the bottom of the base 1. The rollers 11 are in contact with the plane of the shield tunneling starting plate, and the horizontal movement of the segment rotating pallet device is realized through the rollers 11.

[0023] Lifting lugs 12 are provided on the front and rear sides of the base 1. The lifting lugs 12 are used to connect the wire rope traction device of the shield tunneling machine so as to move the base 1 by traction of the wire rope.

[0024] The tray 2 is made of a square steel plate with a length of 1.5m, a width of 1.5m, and a thickness of 2cm. The tray 2 is rotatably mounted on the base 1 via a flat thrust bearing 13 and a bullseye bearing 14. The tray 2 is used to place and fix the pipe segments so as to drive the pipe segments to move and rotate.

[0025] The tray 2 and the base 1 are connected by the following structure: A planar thrust bearing 13 is installed at the center of the top of the base 1. The outer diameter of the planar thrust bearing 13 is 215mm and the inner diameter is 170mm. A locking pin 21 adapted to the planar thrust bearing 13 is installed at the bottom of the tray 2. The locking pin 21 is cylindrical, with a diameter of 168mm and a height of 35mm. The tray 2 is rotatably mounted on the base 1 by inserting the locking pin 21 into the inner ring of the planar thrust bearing 13. In addition, eight bullseye bearings 14 are installed on the top of the base 1. The eight bullseye bearings 14 are arranged in a circumferential arrangement with equal spacing around the planar thrust bearing 13. The circumferential arrangement radius of the eight bullseye bearings 14 is 60cm. The diameter of the bullseye bearings 14 is 67mm, and the balls of the bullseye bearings 14 are facing upwards, so that the bullseye bearings 14 support the bottom of the tray 2. A 2mm gap is left between the bullseye bearings 14 and the tray 2 to ensure the automatic rotation of the tray 2. The planar thrust bearing 13 and the bullseye bearing 14 work together to significantly reduce the friction when the tray 2 rotates, thereby enabling the segment to be rotated manually with low resistance.

[0026] In addition, a nylon anti-detachment ring 22 is provided between the locking pin 21 and the inner ring of the planar thrust bearing 13. The friction of the anti-detachment ring 22 can prevent the tray 2 from detaching from the base 1.

[0027] The top of the tray 2 has two opposing tube segment supports 23. These supports are made of rubber for slip resistance and have a wedge-shaped structure with a 10° inclination angle. The two supports form a tube segment support surface 24 that adapts to the outer wall of the tube segment, allowing for placement and fixation of the tube segment. The tube segment supports 23 are adjustable to fit the tray 2, accommodating different outer wall arc lengths of the tube segments. Specifically, the tube segment supports 23 have a groove 25, and the tray 2 has a screw hole (not shown in the figure). A bolt 26 is adjustablely inserted through the groove 25 and connected to the screw hole, allowing the tube segment supports 23 to be adjusted within a range of 0.3m on the tray 2.

[0028] The above structure ensures that the overall height of the segment rotating pallet device is no more than 30cm, thus solving the technical problem of difficult transportation and rotation of segments in confined spaces.

[0029] The working process of the above-mentioned segment rotating pallet device is as follows:

[0030] 1. Transportation Stage: The tunnel segments are hoisted onto the segment supports 23 of the pallet 2, and the spacing of the segment supports 23 is fixed with bolts 26 to ensure the segments are securely clamped and prevent slippage. The tunnel boring machine is connected to the lifting lugs 12 of the base 1 by steel wire ropes, and the entire device is pulled horizontally along the track to the assembly area.

[0031] II. Rotation and Positioning Stage: After the segment reaches the target position, the operator gently pushes the edge of the segment, and the tray 2 rotates 360° through the linkage of the planar thrust bearing 13 and the bullseye bearing 14. When the segment angle is aligned with the gripping position of the assembly machine, the assembly machine's lifting device attracts and lifts the segment. After the segment is lifted, it is released from the segment rotation tray device, and then the segment assembly begins.

[0032] III. Reset Stage: After the segments are detached from the segment rotating pallet device, the reverse traction base 1 returns to the starting point, and the segment hoisting, transportation and rotation are repeated for reuse.

[0033] The above-described embodiments are merely illustrative of this utility model. Any equivalent embodiments made by those skilled in the art without departing from the technical features disclosed in this utility model, and without departing from the technical features of this utility model, shall still fall within the scope of the technical features of this utility model.

Claims

1. A segment rotation jacking system for launching a shield machine in a narrow cavern, characterized by: The pipe piece rotating tray device comprises a base and a tray, the bottom of the base is provided with a roller, the top of the base is provided with a plane thrust bearing and a bull's eye bearing, the bottom of the tray is provided with a bayonet fitting matched with the plane thrust bearing, the tray is rotatably arranged on the base by inserting the bayonet fitting on the plane thrust bearing, and the bull's eye bearing is supported on the bottom of the tray.

2. A segment rotation skid for launching of a shield tunneling machine in a narrow cavern according to claim 1, characterized in that: The bull's eye bearings are arranged in multiple, and the multiple bull's eye bearings are arranged at equal intervals in a ring around the plane thrust bearing.

3. A segment rotation skid for launching of a shield tunneling machine in a narrow cavern according to claim 2, characterized in that: The bull's eye bearings are arranged in 8, and the radius of the ring arrangement of the 8 bull's eye bearings is 60 cm.

4. A segment rotation skid for launching of a shield tunneling machine in a narrow cavern according to claim 1, characterized in that: A gap of 2 mm is left between the bull's eye bearings and the tray.

5. A segment rotation skid for launching of a shield tunneling machine in a narrow cavern according to claim 1, characterized in that: A anti-loosing ring is further arranged between the bayonet fitting and the plane thrust bearing.

6. A segment rotation skid for launching of a shield tunneling machine in a narrow cavern according to claim 1, characterized in that: A lifting lug is arranged on the base.

7. A segment rotation skid for launching of a shield tunneling machine in a narrow cavern according to claim 1, characterized in that: Opposite sides of the top of the tray are respectively provided with pipe piece supporting legs, and the two pipe piece supporting legs on the two sides form a pipe piece supporting surface matched with the outer side wall of the pipe piece.

8. A segment rotation table apparatus for launching a shield tunnel in a narrow cavern according to claim 7, characterized in that: The pipe piece supporting leg is made of rubber material, the pipe piece supporting leg is in a wedge-shaped structure, and the inclination angle of the pipe piece supporting leg is 10°.

9. A segment rotation table apparatus for launching a shield tunnel in a narrow cavern according to claim 7, characterized in that: A bolt is further included, a strip-shaped groove is arranged on the pipe piece supporting leg, a screw hole is arranged on the tray, the bolt is adjustably arranged on the strip-shaped groove and connected with the screw hole, so that the pipe piece supporting leg is adjustably arranged on the tray.

10. A segment rotation skid for launching of a shield tunneling machine in a narrow cavern according to any one of claims 1-9, characterized in that: The overall height of the pipe piece rotating tray device is not higher than 30 cm.

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