Auxiliary system for welding and assembling shield tail blocks of large-diameter shield tunneling machine

Abstract

The utility model discloses a large-diameter shield tunneling machine shield tail block welding assembly auxiliary system which comprises a plurality of block assembly tools and a shield tail shell, and each block assembly tool comprises a first block connecting plate, a second block connecting plate, a block connecting flange, a bolt, a nut and a gasket. The blocking connecting plate I and the blocking connecting plate II are respectively welded and fixed on two shield tail shells needing to be assembled, the blocking connecting plate I and the blocking connecting plate II are fixed and connected into a whole through the blocking connecting flange by using bolts, nuts and gaskets, and then the shield tail shells are welded. The welding and assembling auxiliary system is used for fixing shield tail blocks of a large-diameter shield tunneling machine when the shield tail blocks are welded and assembled, welding and assembling on a construction site are facilitated, it is guaranteed that the whole shield tail does not deform and is round, and the gap of the shield tail is guaranteed.

Description

Technical Field

[0001] The utility model relates to a shield tail block welding assembly auxiliary system for a large-diameter shield machine, belonging to the technical field of shield machines. Background Art

[0002] The shield machine is a tunnel boring machine that uses the shield method. With the vigorous development and popularization of rail transit projects, the shield machine has gradually moved from miniaturization to large-scale. Due to the limitations of production and transportation capacity, large-diameter shield machines cannot be fully assembled in the workshop and then transported. Therefore, for large-diameter shield machines, it is more convenient and effective to produce the shield body of the shield machine in blocks, and assemble and weld it at the construction site after production. The shield body of a large-diameter shield machine will be divided into two, four or more pieces according to the diameter and weight. The traditional large-diameter shield tail adopts the form of spot welding first and then full welding during assembly. Compared with the front shield and middle shield structures, the shield tail structure does not have components such as rib plates and ring plates inside, and cannot form a good support; at the same time, due to the multiple welds in the longitudinal and circumferential directions of the shield tail, the welding deformation is large, and the roundness of the shield tail cannot be effectively maintained, thereby affecting the shield tail gap; on the other hand, the shell is relatively thin, and the shield tail is easy to deform during welding and transportation; therefore, it is a huge problem faced in the production process of large-diameter shield machines to ensure the accuracy of position fixation when welding components such as the shield body between each block. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a large-diameter shield tail block welding assembly auxiliary system for the defects of the prior art, so as to solve the problem that the multiple shield tail shells of the large-diameter shield machine are difficult to assemble and easy to deform.

[0004] To solve this technical problem, the utility model provides a large-diameter shield tail block welding assembly auxiliary system, including multiple block assembly tools and a shield tail shell. The block assembly tool includes a block connecting plate 1, a block connecting plate 2, a block connecting flange, and bolts, nuts and washers. The block connecting plate 1 and the block connecting plate 2 are respectively welded and fixed on two shield tail shells to be assembled. The block connecting plate 1 and the block connecting plate 2 are fixed through the block connecting flange using bolts, nuts and washers to form a whole, and then the shield tail shell is welded.

[0005] The block connecting plate 1 is formed by welding a connecting plate 1 and a supporting plate 1 in a vertical state while being aligned at the center line; two bolt holes are arranged on the connecting plate 1 for connection with the block connecting plate 2.

[0006] The block connecting plate 2 is formed by aligning the connecting plate 2 and the supporting plate 2 at the center line and welding them in a vertical state; two bolt holes are provided on the connecting plate 2 for connecting with the block connecting plate 1; the block connecting plate 2 is slightly higher than the block connecting plate 1 and is adapted to the circular curvature of the shield tail shell.

[0007] The block connection flange is provided with two through holes, and the block connection plate 1 and the block connection plate 2 are connected by bolts, nuts and washers to fix the position of the tail shell blocks of the large-diameter shield machine.

[0008] Beneficial effects: The utility model adopts a welding assembly auxiliary system to fix the shield tail blocks of a large diameter shield machine during welding and assembly, which is beneficial to the welding and assembly at the construction site, solves the problem of difficult assembly of the shield tail shell of a large diameter shield machine, ensures that the shield tail is not deformed as a whole and has a round shape, and ensures the shield tail gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 It is a schematic cross-sectional view of the structure of the utility model;

[0011] Figure 3 This is a schematic diagram of the installation of the shield tail blocks of the utility model;

[0012] Figure 4 It is an overall schematic diagram of the utility model;

[0013] Figure 5 This is a schematic diagram of the installation of the utility model shield tail block joint;

[0014] Figure 6 This is a schematic diagram of the explosion installation of the utility model shield tail block joint;

[0015] Figure 7 This is a schematic diagram of the outer side of the segmented shield tail shell of the utility model;

[0016] Figure 8 This is a schematic diagram of the inner side of the segmented shield tail shell of the utility model;

[0017] Fig. 9 This is a structural schematic diagram of a block connection plate 1 of the utility model;

[0018] Fig.10 It is a structural schematic diagram of the second block connecting plate of the utility model.

[0019] In the figure: 1. Block connecting plate 1; 2. Block connecting plate 2; 3. Block connecting flange; 4. Bolts; 5. Nuts; 6. Washers; 8. Block assembly tooling; 9. Shield tail shell; 11. Connecting plate 1; 12. Support plate 1; 21. Connecting plate 2; 22. Support plate 2. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1-Figure 10 As shown, the utility model provides a large-diameter shield tail block welding assembly auxiliary system, including multiple block assembly tools 8 and a shield tail shell 9, the block assembly tool 8 includes a block connecting plate 1, a block connecting plate 2, a block connecting flange 3 and bolts 4, nuts 5 and washers 6, the block assembly tool 8 is directly connected to the two shield tail shells 9 that need to be connected, and is unevenly distributed on the inside and outside of the shield tail shell 9. Multiple block assembly tools 8 work together on the inside and outside of the shell to form an auxiliary system, which is connected and installed at the joints of the block shield tail shells 9. The block connecting flange 3 has a connecting effect and fixes the block shells 9 to be connected to ensure that the block shield tail shells 9 are completely fixed; during assembly: the block connecting plate 1 and the block connecting plate 2 2 are respectively welded on the two shield tail shells 9 that need to be welded, the block connecting plate 1 and the block connecting plate 2 2 are used as a bridge through the block connecting flange 3, and are fixed with bolts 4, nuts 5 and washers 6 to form a whole, and then the shield tail shell is welded.

[0022] The block connecting plate 1 and the block connecting plate 2 are respectively fixed on the block shield tail shell 9 to be assembled by welding. The block connecting plate 1 and the block connecting plate 2 need to be welded correspondingly. The block connecting plate 1 is welded on the outside of one shield tail shell, and the block connecting plate 2 2 is welded on the outside of the other shield tail shell to be assembled. Finally, the block connecting plate 1 and the block connecting plate 2 are connected and fixed through the block connecting flange 3 using bolts 4, nuts 5 and washers 6, and vice versa; the block connecting plate 1 and the block connecting plate 2 need to be partially reshaped during the welding process with the shield tail shell 9 to ensure smooth docking, and the welding slag, weld nodules, burrs and splashes are removed after welding.

[0023] The block connecting plate 1 is welded by a connecting plate 11 and a supporting plate 12, and the connecting plate 11 and the supporting plate 12 are aligned at the center line; two bolt holes are provided on the connecting plate 11 for connection with the block connecting plate 2.

[0024] The block connecting plate 2 2 is welded by a connecting plate 2 21 and a supporting plate 22, and the connecting plate 21 and the supporting plate 22 are aligned at the center line and are in a vertical state; two bolt holes are provided on the connecting plate 21 for connection with the block connecting plate 1; the block connecting plate 2 2 is slightly higher than the block connecting plate 1, and is adapted to the circular curvature of the shield tail shell 9.

[0025] The block connecting flange 3 is provided with two through holes, and the block connecting plate 1 and the block connecting plate 2 2 are connected by bolts 4, nuts 5 and washers 6 to fix the position of the block of the tail shell of the large-diameter shield machine.

[0026] The utility model provides a method for welding and assembling the shield tail blocks of a large-diameter shield machine as follows: a block connecting plate 1 and a block connecting plate 2 are respectively welded on two shield tail shells 9 that need to be welded, the block connecting plate 1 and the block connecting plate 2 are bridged by a block connecting flange 3, and are fixed with bolts 4, nuts 5 and washers 6 to form a whole, and then the shield tail shell welding operation is started. After the welding of the shield tail shell of the large-diameter shield machine is completed, the block assembly auxiliary system is removed. Figure 4 It is shown that the tail shell 9 of a large-diameter shield machine divided into four blocks is connected and fixed by a large-diameter shield machine tail shell block assembly auxiliary system. Both the inner and outer sides of the tail shell 9 of the large-diameter shield machine need to be fixed using the large-diameter shield machine block assembly auxiliary system, and then the tail shells 9 can be welded and assembled.

[0027] The utility model solves the problem that the tail shell of a large-diameter shield machine is difficult to assemble and easy to deform. When assembling the tail shell, a large-diameter shield machine tail block assembly auxiliary system is used to fix it, which is beneficial to the welding assembly at the construction site, ensures that the overall tail shell is not deformed and has a round shape, and ensures the gap between the tail shells.

[0028] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A large-diameter shield machine tail block welding assembly auxiliary system, characterized by: The invention comprises a plurality of block assembly tools (8) and a shield tail shell (9). The block assembly tool (8) comprises a block connection plate 1 (1), a block connection plate 2 (2), a block connection flange (3), and bolts (4), nuts (5) and washers (6). The block connection plate 1 (1) and the block connection plate 2 (2) are respectively welded and fixed on two shield tail shells (9) to be assembled. The block connection plate 1 (1) and the block connection plate 2 (2) are fixed by bolts (4), nuts (5) and washers (6) through the block connection flange (3) to form a whole. Then, the shield tail shell (9) is welded.

2. The large-diameter shield tail block welding assembly auxiliary system according to claim 1 is characterized in that: The block connecting plate 1 (1) is formed by welding a connecting plate 1 (11) and a supporting plate 1 (12) aligned at the center line in a vertical state; the connecting plate 1 (11) is provided with two bolt holes for connecting with the block connecting plate 2 (2).

3. The large-diameter shield machine tail block welding assembly auxiliary system according to claim 1 is characterized by: The segmented connecting plate 2 (2) is formed by welding the segmented connecting plate 2 (21) and the support plate 2 (22) in a vertical state aligned at the center line; the segmented connecting plate 2 (21) is provided with two bolt holes for connection with the segmented connecting plate 1 (1); the segmented connecting plate 2 (2) is slightly higher than the segmented connecting plate 1 (1) and is adapted to the circular arc of the shield tail shell (9).

4. The large-diameter shield tail block welding assembly auxiliary system according to any one of claims 1 to 3, characterized in that: The block connection flange (3) is provided with two through holes, and the block connection plate 1 (1) and the block connection plate 2 (2) are connected by bolts (4), nuts (5) and washers (6) to achieve the position fixation of the blocks of the shield tail shell (9) of the large-diameter shield machine.

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