Duct piece fixing device for assembling negative ring duct pieces

Abstract

The utility model provides a duct piece fixing device for assembling negative ring duct pieces, which comprises a detachable connecting mechanism provided with a fixing seat, the fixing seat is welded and fixed on the inner circumferential wall of a shield tail shell of a shield tunneling machine, a connecting flange is detachably arranged at the bottom of the fixing seat, and a telescopic hanging rod is vertically and fixedly arranged in the middle of the bottom of the connecting flange. A main supporting rod is fixedly arranged on one side of the bottom end of the telescopic hanging rod, side supporting rods are arranged on the two sides of the main supporting rod, supporting connecting rods are symmetrically arranged on the sides, close to the main supporting rod, of the side supporting rods, the ends of the supporting connecting rods are hinged to the side face of the main supporting rod, and a side supporting rod adjusting mechanism for driving the supporting connecting rods to swing up and down is arranged below the main supporting rod. According to the utility model, the connecting flange and the fixing seat in the detachable connecting mechanism are detachably and fixedly connected, when the negative ring duct piece is installed, the connecting flange and the fixing seat are fixedly connected firstly, and the connecting flange is detached from the fixing seat after the installation is finished, so that the situation that the negative ring duct piece is collided and damaged in the subsequent construction process and is installed and used again in the next construction process is avoided.

Description

A segment fixing device for negative ring segment assembly Technical Field

[0001] This utility model belongs to the field of tunnel construction technology, specifically relating to a segment fixing device for negative ring segment assembly. Background Technology

[0002] The negative ring segment, also known as the temporary segment, is a ring-shaped segment installed between the reaction frame and the shield jacks during the initial shield tunneling launch to provide the tunnel boring machine (TBM) with the force to propel it forward. During the initial launch, in the launching shaft, the rear end of the TBM is a reaction frame (providing the backing force). The ring segment is installed between the reaction frame and the shield jacks to provide the force for the TBM to propel it forward until the shield tail enters the opening on the other side of the shaft wall and has advanced a certain distance. At this point, the friction between the ground and the positive ring segment can counteract the reaction force generated by the TBM's propulsion. Then, the temporary segment between the reaction frame and the shield tail has fulfilled its purpose and can be removed.

[0003] In the prior art, Chinese utility model patent document with authorization announcement number CN221169579U discloses a segment fixing device for negative ring segment assembly. It fixes the segments with an L-shaped fixing plate and a top rod. After fixing, the position of the segments can be slightly adjusted by the top rod to ensure that the segment assembly accuracy meets the requirements. However, the foot plate is welded to the inner circumferential wall of the shield tail shell of the tunnel boring machine, which is not convenient for quick installation and disassembly and is difficult to reuse.

[0004] Therefore, it is necessary to design a segment fixing device for negative ring segment assembly that is easy to install and disassemble quickly and is reusable to solve the current technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a negative ring segment assembly method that is convenient and quick to install and disassemble, and facilitates reuse.

[0006] The technical solution of this utility model is as follows: a segment fixing device for negative ring segment assembly, including a detachable connecting mechanism with a fixing seat. The fixing seat is welded and fixed to the inner circumferential wall of the shield tail shell of the tunnel boring machine. A connecting flange is detachably provided at the bottom of the fixing seat. A telescopic rod is vertically fixed at the center of the bottom of the connecting flange. A main support rod is fixedly provided on one side of the bottom end of the telescopic rod. Side support rods are provided on both sides of the main support rod. Support connecting rods are symmetrically provided on the side support rods near the main support rod. The end of the support connecting rod is hinged to the side of the main support rod. A side support rod adjustment mechanism for driving the support connecting rod to swing up and down is provided below the main support rod.

[0007] Furthermore, the telescopic boom has a fixed boom that is vertically fixed at the bottom of the connecting flange, a movable boom that is slidably fitted on the outer side of the lower end of the fixed boom, and a telescopic adjustment bolt that is rotatably installed inside the lower end of the movable boom. The upper end of the telescopic adjustment bolt is connected to the internal thread of the fixed boom.

[0008] Furthermore, the side support rod adjustment mechanism has a lifting seat that is slidably disposed below the main support rod in a vertical direction. The lifting seat is internally threaded with a lifting adjustment bolt. The upper end of the lifting adjustment bolt is rotatably connected to the bottom of the main support rod. Pushing connecting rods are hinged to both sides of the lifting seat. The end of the pushing connecting rod opposite to the lifting seat is hinged to the middle of the supporting connecting rod.

[0009] Furthermore, two guide rods parallel to the lifting adjustment bolt are symmetrically arranged at the bottom of the main support rod, and the lifting seat is slidably connected to the guide rods.

[0010] Furthermore, a positioning block is fixedly provided at the bottom of the fixed base, and a groove matching the positioning block is provided on the side of the connecting flange opposite to the telescopic rod.

[0011] Furthermore, the bottom of the fixing base has a circumferential array of studs that match the connecting flange, and the studs are fitted with nuts for detachably fixing the connecting flange to the fixing base.

[0012] The beneficial effects of this utility model are:

[0013] (1) In this utility model, the connecting flange and the fixed seat are detachably fixed in the detachable connection mechanism. When installing the negative ring pipe segment, the connecting flange and the fixed seat are connected and fixed first. After the installation is completed, the connecting flange is removed from the fixed seat to avoid collision damage during subsequent construction. It can be installed and used again during the next construction.

[0014] (2) By adjusting the length of the telescopic rod, the position of the main support rod can be adjusted along the axial direction of the segment so that the main support rod abuts against the inner side of the segment, providing stable support for the segment;

[0015] (3) After the main support rod supports the segment, the swing of the support connecting rod is adjusted by the side support rod adjustment mechanism so that the side support rod abuts against the inside of the segment, increasing the support range inside the segment and further improving the stability of the segment support. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of this utility model.

[0017] Figure 2 is a schematic diagram of the structure of this utility model.

[0018] Figure 3 is a cross-sectional view of section AA in Figure 2.

[0019] Figure 4 is a structural schematic diagram of the fixed value in this utility model. Detailed Implementation

[0020] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0021] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] As shown in Figures 1 to 4, the segment fixing device for assembling negative ring segments includes a detachable connecting mechanism 1, which has a fixing seat 11. The fixing seat 11 is welded and fixed to the inner circumferential wall of the shield tail shell of the tunnel boring machine. A connecting flange 12 is detachably provided at the bottom of the fixing seat 11. A telescopic rod 2 is vertically fixed at the center of the bottom of the connecting flange 12. A main support rod 3 is fixedly provided on one side of the bottom end of the telescopic rod 2. Side support rods 4 are provided on both sides of the main support rod 3. Supporting connecting rods 41 are symmetrically provided on the side of the side support rods 4 near the main support rod 3. The end of the supporting connecting rod 41 is hinged to the side of the main support rod 3. A side support rod adjustment mechanism 5 for driving the supporting connecting rods 41 to swing up and down is provided below the main support rod 3. In this embodiment, the detachable connecting mechanism... In structure 1, the connecting flange 12 and the fixed seat 11 are detachably fixed. During the installation of the negative ring segment, the connecting flange 12 and the fixed seat 11 are first connected and fixed. After the installation is completed, the connecting flange 12 is removed from the fixed seat 11 to avoid collision damage during subsequent construction. It can be reinstalled and used in the next construction. By adjusting the length of the telescopic hanger 2, the position of the main support rod 3 can be adjusted along the axial direction of the segment so that the main support rod 3 abuts against the inner side of the segment, providing stable support for the segment. After the main support rod 3 supports the segment, the support connecting rod 41 is swung by adjusting the side support rod adjustment mechanism 5 so that the side support rod 5 abuts against the inside of the segment, increasing the support range inside the segment and further improving the stability of the segment support.

[0023] In some embodiments, the telescopic boom 2 has a fixed boom 21 vertically fixed at the bottom of the connecting flange 12. A movable boom 22 is slidably fitted on the outer side of the lower end of the fixed boom 21. A telescopic adjustment bolt 23 is rotatably installed inside the lower end of the movable boom 22. The upper end of the telescopic adjustment bolt 23 is threadedly connected to the inner end of the fixed boom 21. By rotating the telescopic adjustment bolt 23, the telescopic adjustment bolt 23 extends and retracts inside the lower end of the fixed boom 21 through the threaded structure, causing the movable boom 22 to move up and down at the lower end of the fixed boom 21. The movable boom 22 causes the main support rod 3 to move up and down, adjusting the position of the main support rod 3 so that the main support rod 3 provides stable and precise support for the tunnel segment.

[0024] In some embodiments, the side support rod adjustment mechanism 5 has a lifting seat 51 that is slidably disposed below the main support rod 3 in a vertical direction. The lifting seat 51 is internally threaded with a lifting adjustment bolt 52. The upper end of the lifting adjustment bolt 52 is rotatably connected to the bottom of the main support rod 3. Both sides of the lifting seat 51 are hinged with push connecting rods 54. One end of the push connecting rod 54 away from the lifting seat 51 is hinged to the middle of the support connecting rod 41. When the lifting adjustment bolt 52 is rotated, the lifting adjustment bolt 52 cooperates with the threaded structure of the lifting seat 51 to drive the lifting seat 51 to move up and down. During the up and down movement of the lifting seat 51, the push connecting rod 54 drives the support connecting rod 41 to swing, thereby realizing the up and down movement adjustment of the side support rod 4 to match the support of tube segments with different inner diameters.

[0025] In some embodiments, two guide rods 53 parallel to the lifting adjustment bolt 52 are symmetrically arranged at the bottom of the main support rod 3. The lifting seat 51 is slidably connected to the guide rods 53, and the lifting seat 51 and the guide rods 53 are slidably connected in cooperation, which improves the stability of the movement of the lifting seat 51.

[0026] In some embodiments, as shown in FIG4, a positioning block 14 is fixedly provided at the bottom of the fixed base 11, and a groove matching the positioning block 14 is provided on the side of the connecting flange 12 away from the telescopic rod 21; the connecting flange 12 and the fixed base 11 cooperate with the positioning block 14 through the groove, which can limit the orientation between the connecting flange 12 and the fixed base 11, and improve the convenience of connection positioning.

[0027] In some embodiments, the bottom of the mounting base 11 has a circumferential array of studs 13 that match the connecting flange 12, and the studs 13 are fitted with nuts for detachably fixing the connecting flange 12 and the mounting base 11.

[0028] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0029] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A segment fixing device for assembling negative ring segments, characterized in that: The device includes a detachable connection mechanism with a fixed base welded to the inner circumferential wall of the shield tail shell of the tunnel boring machine. A connecting flange is detachably provided at the bottom of the fixed base. A telescopic boom is vertically fixed at the center of the bottom of the connecting flange. A main support rod is fixed to one side of the bottom end of the telescopic boom. Side support rods are provided on both sides of the main support rod. Support connecting rods are symmetrically provided on the side support rods near the main support rod. The ends of the support connecting rods are hinged to the side of the main support rod. A side support rod adjustment mechanism for driving the support connecting rods to swing up and down is provided below the main support rod.

2. The segment fixing device for negative ring segment assembly according to claim 1, characterized in that: The telescopic boom has a fixed boom that is vertically fixed at the bottom of the connecting flange. A movable boom is slidably fitted on the outer side of the lower end of the fixed boom. An extension adjustment bolt is rotatably installed inside the lower end of the movable boom. The upper end of the extension adjustment bolt is threadedly connected to the fixed boom.

3. The segment fixing device for segment assembly of a negative loop canal according to claim 1, characterized in that: The side support rod adjustment mechanism has a lifting seat that is slidably disposed below the main support rod in a vertical direction. The lifting seat is internally threaded with a lifting adjustment bolt. The upper end of the lifting adjustment bolt is rotatably connected to the bottom of the main support rod. Pushing connecting rods are hinged to both sides of the lifting seat. The end of the pushing connecting rod opposite to the lifting seat is hinged to the middle of the supporting connecting rod.

4. The segment fixing device for segment assembly of a negative cycle pipe according to claim 3, characterized in that: The bottom of the main support rod is symmetrically provided with two guide rods parallel to the lifting adjustment bolt, and the lifting seat is slidably connected to the guide rods.

5. The segment fixing device for segment assembly of a negative loop canal according to claim 1, characterized in that: A positioning block is fixedly installed at the bottom of the fixed base, and a groove matching the positioning block is opened on the side of the connecting flange opposite to the telescopic rod.

6. The segment fixing device for negative ring segment assembly according to claim 1, characterized in that: The bottom of the fixing base has a circumferential array of studs that match the connecting flange, and the studs are fitted with nuts for detachably fixing the connecting flange to the fixing base.

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