Weight lifting arm for assembling subway tunnel shield segments

Abstract

The utility model relates to the technical field of segment assembly, and discloses a weightlifting arm for subway tunnel shield segment assembly, a segment is provided with a slotted hole, the weightlifting arm is inserted into the slotted hole of the segment, the upper side of the weightlifting arm and one side perpendicular to the upper side are exposed out of the segment, a gap is formed between the slotted hole and the inserted weightlifting arm, and the weightlifting arm is inserted into the slotted hole. The lifting arm is fixedly connected to the duct piece by injecting stone mortar into the gap, and the lifting arm comprises a lifting assembly, a lifting assembly and a lifting assembly, and the lifting assembly is arranged in the duct piece to form an assembled connecting port; the circular shaft is arranged on the weight lifting assembly; the connecting shafts are arranged in at least one group, one group comprises two connecting shafts, and the two connecting shafts in one group are symmetrically arranged on the two sides of the circular shaft; the arc-shaped shaft is arranged at the connecting middle part of the two symmetrical connecting shafts; and the supporting pipe is hollow and is inserted into the arc-shaped shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe segment assembly, in particular to a lifting arm for assembling shield pipe segments of a subway tunnel. Background Art

[0002] The lifting arm for assembling shield segments in iron tunnels is a mechanical device specially designed to assist in assembling segments during shield tunnel construction. With the acceleration of urbanization, the demand for the construction of underground rail transit systems such as subways is increasing, and the shield method, as an efficient and safe tunneling technology, is widely used in the construction of subway tunnels. In this process, the assembly and installation of segments is a key step to ensure the stability and safety of the tunnel structure.

[0003] However, although the existing lifting arm can play the role of assembling the pipe segments, it cannot achieve the pipe laying work at the same time. Therefore, it is relatively troublesome to lay pipes in the future.

[0004] In view of the above, the present application proposes a lifting arm for assembling shield segments of a subway tunnel, which can realize the need of laying pipes simultaneously when assembling the segments. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a lifting arm for assembling shield segments of a subway tunnel, which solves the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A lifting arm for assembling shield segments of a subway tunnel, wherein the segment has a slot, the lifting arm is inserted into the slot of the segment, the upper side of the lifting arm and a side perpendicular to the upper side are exposed outside the segment, and a gap is formed between the slot and the inserted lifting arm, and the gap is injected with stone mortar to enable the lifting arm to be fixedly connected to the segment, comprising:

[0008] A weight lifting assembly is provided in the pipe segment to form a connection port for assembly;

[0009] A circular shaft, provided on the weight lifting assembly;

[0010] There is at least one group of connecting shafts, one group has two connecting shafts, and the two connecting shafts in one group are symmetrically arranged on both sides of the circular shaft;

[0011] An arc-shaped axis is arranged at the middle of the connection of two symmetrical connecting axes;

[0012] The support tube is hollow inside and inserted into the arc shaft.

[0013] Optionally, the weightlifting assembly includes a front axle and a long axle;

[0014] The front axle is exposed outside the tube segment;

[0015] The long shaft is coaxially connected with the front shaft.

[0016] Optionally, the surface of the long axis is provided with convex strips, and the convex strips are arranged in a plurality of groups in an annular distribution on the long axis.

[0017] Optionally, a mounting plate is provided on the surface of the arc-shaped shaft, and the mounting plate is exposed outside the segment and fixed to the segment surface by bolts.

[0018] Optionally, the support tube includes a central axis and an extension axis;

[0019] There are two extension shafts, which are respectively arranged at the two ends of the central shaft; the outer diameter of the extension shaft is smaller than the outer diameter of the central shaft.

[0020] The utility model provides a lifting arm for assembling shield segments of a subway tunnel, which has the following beneficial effects:

[0021] 1. Through the coordination of the lifting assembly, the round shaft, the connecting shaft, the arc shaft and the supporting tube, the assembly of the components is relatively convenient. After the connection, it can not only assist in the connection between multiple segments, but also realize the pipe laying operation during the segment assembly operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the slot structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the weightlifting assembly of the utility model;

[0025] Figure 4 This is a schematic diagram of the circular shaft structure of the utility model;

[0026] Figure 5 This is a schematic diagram of the support pipe structure of the utility model.

[0027] In the figure: 1, weight-lifting assembly; 11, front axle; 12, long axis; 121, convex strip; 2, round axis; 3, connecting axis; 4, arc axis; 41, mounting plate; 5, support tube; 51, middle axis; 52, extension axis; 6, pipe segment; 7, slot hole. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0029] In the description of the present invention, it should be understood that the terms "lateral", "longitudinal", "end", "edge", "sidewall", "up", "down", "upper part", "lower part", "directly above", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "end", "head" and "tail" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solution of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] The present application proposes a lifting arm for assembling shield segments of a subway tunnel, which is specifically as follows:

[0031] See reference Figure 1 The present application is mainly used for the splicing and assembly between pipe segments 6. The main structure includes a weight-lifting component 1, a round shaft 2 arranged on the weight-lifting component 1, a connecting shaft 3 installed and connected to the round shaft 2, an arc-shaped shaft 4 arranged on the connecting shaft 3, and a support tube 5 inserted into the arc-shaped shaft 4. The structure constitutes an integral weight-lifting wall structure, which is used as a connecting part to connect one pipe segment with another when the pipe segments are assembled, ensuring that they can be accurately docked and positioned during the installation process, and withstand certain stresses and loads, helping to disperse and transmit the pressure on the pipe segments, and ensuring the stability of the entire tunnel structure.

[0032] For reference Figure 2 , the lifting arm as a whole is directly plugged into the slot 7 opened in the pipe segment 6 during use. Because the slot 7 is needed to meet the needs of plugging the lifting arm in the early stage, the slot 7 needs to be opened according to the widest and highest position of the lifting arm. When the lifting arm is plugged into the slot 7, a gap will be generated between the position where the width and height of the lifting arm are smaller and the slot 7. In order to better fix the lifting arm in the slot 7, sand and gravel slurry is selected and injected into the slot 7 along the gap to fill the gap. When the sand and gravel slurry solidifies, the lifting arm is stably connected to the pipe segment 6.

[0033] For reference Figure 3 The weight-lifting assembly 1 is arranged in the pipe segment 6, and the weight-lifting assembly 1 is used to connect the pipe segment 6 with the other pipe segments to form a connection position, thereby ensuring the connection correspondence between the two pipe segments.

[0034] Among them, the weight-lifting assembly 1 includes a front axle 11 and a long axis 12, and the long axis 12 is coaxially fixed with the front axle 11; during installation, the long axis 12 is inserted into the slot 7, and the front axle 11 is exposed on the outside of the pipe segment 6; the front axle 11 is exposed to the outside to form a connection position, and when the next pipe segment is installed, the front axle 11 position can be used for connection and installation.

[0035] In order to further consider whether the long shaft 12 may rotate during installation, a convex strip 121 is provided on the surface of the long shaft 12. There are a plurality of convex strips 121, at least four of which are distributed in a ring on the long shaft 12 to increase the contact piece and friction surface of the long shaft 12 and reduce the possibility of rotation of the long shaft 12.

[0036] In the prior art, due to some special circumstances, it may be necessary to set steel pipes or wiring pipes, water pipes, etc. near the pipe segments 6, which will make it difficult to implement after the pipe segments are assembled. In order to solve this structural problem, the weight lifting assembly 1 is improved, and an arc shaft 4 and a support pipe 5 are set to realize the pipe laying work directly during the assembly operation when the pipe segments 6 are assembled.

[0037] For reference Figure 1 and Figure 4 First, a round shaft 2 is provided on the surface of the weight lifting component 1 as a base for the arc shaft 4 and the support tube 5. The inner wall of the round shaft 2 is adapted to a plurality of convex strips 121, which can also relatively reduce the possibility of the convex strips 121 rotating.

[0038] A connecting shaft 3 is arranged on the circular shaft 2, so that the arc shaft 4 and the support tube 5 can be stably supported on the connecting shaft 3; wherein the connecting shaft 3 is arranged and installed in a group on one circular shaft 2, and a group consists of two connecting shafts 3, which are symmetrically arranged on the circular shaft 2; the two connecting shafts 3 in a group are welded to the circular shaft 2, and the whole is L-shaped, with one side close to the surface of the circular shaft 2 and the other side close to the side of the circular shaft 2, and a clamping connection is formed between the connection between the connecting shaft 3 and the side of the circular shaft 2 and the convex strip 121, thereby increasing the stability of the connection.

[0039] It should be noted that, in one embodiment, according to the position setting of the pipe segment 6 and the required direction of the pipe laying, a group of connecting shafts 3 are installed in the most suitable position for use; but in another group of embodiments, when pipe laying is required at both ends of the pipe segment 6, two groups of connecting shafts 3 are installed according to the requirements of the two positions.

[0040] After the circular shaft 2 and the connecting shaft 3 are installed and fixed, the arc shaft 4 is connected to the connecting shaft 3 by bolts or welding, and the two ends of the arc shaft 4 correspond to the two connecting shafts 3 symmetrically arranged.

[0041] For reference Figure 1 There is an opening on the upper side of the slot 7 that is adapted to the width of the arc shaft 4. When the long axis 12 is inserted into the slot 7, the arc shaft 4 is exposed outside the opening and moves into the slot 7 along the opening, and is used to fix the arc shaft 4 after it moves. A mounting plate 41 is provided on the surface of the arc shaft 4. When the long axis 12 enters the opening, the mounting plate 41 is exposed outside the opening, and after the position is determined, the mounting plate 41 is stably connected to the pipe segment 6 by bolts or welding.

[0042] For reference Figure 1 and Figure 5 The arc-shaped shaft 4 plays the role of stabilizing the support tube 5. The support tube 5 is inserted into the arc-shaped shaft 4 and includes a central shaft 51 and an extension shaft 52. There are two extension shafts 52, which are respectively arranged at both ends of the central shaft 51. The outer diameter of the extension shaft 52 is smaller than the outer diameter of the central shaft 51. When extension is required, the required extension tube can be connected to the extension shaft 52 for extension. The outer diameter of the extended tube can adapt to the diameter of the central shaft 51, so that the surface after connection is smooth and has no bumps.

[0043] In the utility model, the working steps of the device are as follows:

[0044] 1. First, insert the long shaft 12 into the slot 7, and ensure that the front shaft 11, the arc shaft 4 and the support tube 5 are exposed outside;

[0045] 2. Secondly, the arc shaft 4 is fixed to the surface of the tube segment 6 by bolts or welding;

[0046] 3. Then, insert one end of the long axis 12 into the slot 7 to seal it, inject sand and gravel slurry from the upper opening, and remove the obstruction at the sealing point after solidification;

[0047] 4. Finally, assemble multiple pipe segments 6 in sequence, and connect two adjacent extension shafts 52 through external extension pipes until the terminal position. If multiple pipe layouts are not required, it is only necessary to set a lifting arm in one pipe segment 6, and the rest can be installed in the lifting assembly 1.

[0048] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A lifting arm for assembling shield segments of a subway tunnel, wherein the segment (6) has a slot (7), the lifting arm is inserted into the slot (7) of the segment (6), the upper side of the lifting arm and a side perpendicular to the upper side are exposed to the outside of the segment (6), and a gap is formed between the slot (7) and the inserted lifting arm, and the gap is injected with stone mortar to enable the lifting arm to be fixedly connected to the segment (6), characterized in that: include, A weight lifting assembly (1) is arranged in the pipe segment (6) to form an assembled connection port; A circular shaft (2) is disposed on the weight-lifting assembly (1); The connecting shafts (3) are provided in at least one group, each group having two connecting shafts, and the two connecting shafts (3) in one group are symmetrically arranged on both sides of the circular shaft (2); An arc-shaped shaft (4) is arranged at the middle of the connection between the two symmetrical connection shafts (3); The support tube (5) is hollow inside and is inserted into the arc-shaped shaft (4).

2. The lifting arm for assembling shield segments of a subway tunnel according to claim 1 is characterized in that: The weight lifting assembly (1) comprises a front axle (11) and a long axle (12); The front shaft (11) is exposed outside the tube segment (6); The long shaft (12) is coaxially connected to the front shaft (11).

3. The lifting arm for assembling shield segments of a subway tunnel according to claim 2 is characterized in that: The surface of the long axis (12) is provided with convex strips (121), and the convex strips (121) have multiple groups and are distributed in an annular manner on the long axis (12).

4. The lifting arm for assembling shield segments of a subway tunnel according to claim 1, characterized in that: A mounting plate (41) is provided on the surface of the arc-shaped shaft (4); the mounting plate (41) is exposed outside the pipe segment (6) and is fixed to the surface of the pipe segment (6) by bolts.

5. The lifting arm for assembling shield segments of a subway tunnel according to claim 1, characterized in that: The support tube (5) comprises a central axis (51) and an extension axis (52); There are two extension shafts (52), which are respectively arranged at the two ends of the central shaft (51); the outer diameter of the extension shaft (52) is smaller than the outer diameter of the central shaft (51).

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