A prestressed tensioning tooling and cantilever beam making machine

Abstract

This utility model relates to a prestressed tensioning operation fixture and a cantilever beam-building machine. The utility model includes a load-bearing support mechanism, comprising a column with a first end and a second end opposite to each other. The first end of the column is provided with a connecting structure for connecting to the cantilever beam-building machine. A steering mechanism includes a first support plate and a second support plate disposed at the second end of the column and axially opposite to each other, with a pivot shaft extending axially along the column connecting the first and second support plates. A cantilever extension beam includes a cantilever arm extending radially along the column and connected to the pivot shaft, and a diagonal brace arm connected to the cantilever arm and the pivot shaft, forming a triangular support structure between the cantilever arm, the diagonal brace arm, and the pivot shaft. A lifting mechanism includes a self-propelled electric hoist capable of moving along the cantilever arm, used for lifting the tensioning jack. This utility model can improve construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction equipment technology, and in particular to a prestressed tensioning tool and a cantilever beam-making machine. Background Technology

[0002] In modern bridge construction, the cantilever casting method, as the core construction method for long-span prestressed concrete bridges, has formed a mature technological system after half a century of technological iteration. From traditional hanging basket cantilever casting to mobile formwork construction, and now to the widespread use of modular cantilever beam-building machines, the electromechanical-hydraulic integration of construction equipment has been significantly improved, while higher requirements have been placed on expanding the functions of cantilever beam-building machines.

[0003] Prestressing is a crucial step in bridge construction, aiming to improve the overall load-bearing capacity and durability of the bridge structure. However, current construction methods often rely on large lifting equipment such as tower cranes for prestressing operations. Due to the limited working space of tower cranes in bridge projects, the prolonged occupation of tower cranes during prestressing can disrupt other construction processes, reducing overall construction efficiency and extending the construction period. Summary of the Invention

[0004] Therefore, this utility model provides a prestressed tensioning operation tool and a cantilever beam building machine for bridge prestressing tensioning operations. It has a simple structure, is easy to operate, can reduce the time occupied by tower cranes, and improve construction efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides a prestressed tensioning operation tooling, comprising:

[0006] A load-bearing support mechanism includes a column, the column having a first end and a second end disposed opposite to each other, the first end of the column being provided with a connection structure for connecting to a cantilever beam-making machine;

[0007] The steering mechanism includes a first support plate and a second support plate disposed at the second end of the column and arranged opposite to each other along the axial direction, and a pivot shaft extending along the axial direction of the column is rotatably connected between the first support plate and the second support plate.

[0008] A cantilever extension beam, the cantilever extension beam including a cantilever arm extending radially along the column and connected to the pivot axis, and a diagonal brace arm connected to the cantilever arm and connected to the pivot axis, the cantilever arm, the diagonal brace arm and the pivot axis forming a triangular support structure;

[0009] The lifting mechanism includes a self-propelled electric hoist capable of moving along the boom, the self-propelled electric hoist being used to lift tension jacks.

[0010] In one embodiment of this utility model, the connecting structure includes two connecting plates connected by bolts. One of the connecting plates is welded to the gantry beam of the cantilever beam-making machine, and the other connecting plate is welded to the first end of the column and a reinforcing plate distributed in a ring along the column is provided between the connecting plate and the column.

[0011] In one embodiment of this utility model, the first support plate is welded to the top of the column, the second support plate is welded to the side surface of the column, both the first support plate and the second support plate are provided with reserved holes, and the pivot shaft is provided with pivot pins that pass through and are rotatably connected to the two corresponding reserved holes at both axial ends.

[0012] In one embodiment of this utility model, a first stiffening plate is provided between the second support plate and the side surface of the column.

[0013] In one embodiment of this utility model, one end of the lifting arm and the diagonal support arm are welded together, and the other end of the lifting arm and the diagonal support arm are welded to the side surface of the pivot shaft. A support rod is also connected between the arm body of the lifting arm and the arm body of the diagonal support arm.

[0014] In one embodiment of this utility model, a second stiffening plate is provided between the other end of the cantilever arm and the diagonal brace arm and the side surface of the pivot axis.

[0015] In one embodiment of the present invention, the self-propelled electric hoist includes a traveling wheel, and a track for supporting the movement of the traveling wheel is provided on the side end of the boom. Limiting devices are provided on both sides of the boom located in the traveling direction of the self-propelled electric hoist. The limiting device includes a limiting seat and a rubber pad provided on the limiting seat.

[0016] This utility model also provides a cantilever beam-making machine, including the aforementioned prestressing tensioning workpiece.

[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0018] The present invention discloses a prestressed tensioning operation fixture and a cantilever beam-building machine. By integrating a dedicated prestressed tensioning operation fixture on the cantilever beam-building machine, it enables the autonomous lifting of heavy equipment such as tensioning jacks. This significantly reduces the time occupied by the tower crane on site, effectively avoids waiting for procedures due to limited tower crane resource allocation, improves the overall construction progress of the bridge, shortens the construction period, and reduces the total project cost to a certain extent. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the axial structure of the prestressed tensioning tool of this utility model.

[0021] Figure 2 This is a structural schematic diagram of the cantilever extension beam of this utility model.

[0022] Figure 3 This is a schematic diagram of the prestressed tensioning operation tool and the installation of the cantilever beam making machine of this utility model.

[0023] Explanation of reference numerals on the accompanying drawings:

[0024] 100. Prestressed tensioning equipment; 1. Load-bearing support mechanism; 11. Column; 12. Connecting structure; 121. Connecting plate; 122. Reinforcing plate;

[0025] 2. Steering mechanism; 21. First support plate; 22. Second support plate; 23. Pivot shaft; 231. Rotating pin; 24. First stiffening plate;

[0026] 3. Cantilever extension beam; 31. Cantilever arm; 32. Diagonal brace arm; 33. Second stiffening plate; 34. Support rod;

[0027] 4. Lifting mechanism; 41. Self-propelled electric hoist; 42. Traveling wheels; 43. Limiting device;

[0028] 5. Cantilever beam-making machine; 51. Gantry beam. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0030] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0031] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0032] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0033] Reference Figure 1 , Figure 2 As shown, the present invention provides a prestressed tensioning work fixture 100, comprising:

[0034] The load-bearing support mechanism 1 includes a column 11, which includes a first end and a second end that are arranged opposite to each other. The first end of the column 11 is provided with a connecting structure 12 for connecting to the cantilever beam-making machine 5.

[0035] The steering mechanism 2 includes a first support plate 21 and a second support plate 22 disposed at the second end of the column 11 and disposed opposite to each other along the axial direction. A pivot shaft 23 extending along the axial direction of the column 11 is rotatably connected between the first support plate 21 and the second support plate 22.

[0036] The cantilever extension beam 3 includes a cantilever arm 31 extending radially along the column 11 and connected to the pivot shaft 23, and a diagonal brace arm 32 connected to the cantilever arm 31 and the pivot shaft 23. The cantilever arm 31, the diagonal brace arm 32 and the pivot shaft 23 form a triangular support structure to ensure the strength and stiffness of the cantilever during tensioning operations and effectively prevent deformation and instability.

[0037] The lifting mechanism 4 includes a self-propelled electric hoist 41 that can move along the boom 31, and the self-propelled electric hoist 41 is used to lift the tension jack.

[0038] In one embodiment, the connecting structure 12 includes two connecting plates 121 connected by bolts. One connecting plate 121 is welded to the (front inverted U-shaped) gantry beam 51 of the cantilever beam-building machine 5, and the other connecting plate 121 is welded to the first end (bottom end) of the column 11, with reinforcing plates 122 arranged in a ring along the column 11 between them. The load-bearing support mechanism 1 is reliably connected to the beam of the cantilever beam-building machine 5 by bolts, which facilitates quick installation and disassembly while ensuring the load-bearing capacity and working stability of the tooling, meeting the high requirements for load-bearing capacity and safety in bridge tensioning operations.

[0039] In one embodiment, the first support plate 21 is welded to the top of the column 11, and the second support plate 22 is welded to the side surface of the column 11. Both the first support plate 21 and the second support plate 22 have pre-drilled holes. The pivot shaft 23 has pivot pins 231 at both axial ends that pass through and are rotatably connected to the corresponding two pre-drilled holes. By using the pivot shaft 23 to pass through the two support plates at the top of the column 11 and forming a rotatable connection through the pivot pins 231, it possesses good rotational flexibility and load-bearing capacity, which helps the cantilever extension beam 3 rotate within a large angle range, meeting the tensioning and positioning requirements under different working conditions.

[0040] It should be noted that the cantilever extension beam 3 in this embodiment can rotate freely within a wide range of 270 degrees along the pivot axis 23. Combined with the travel track of the lifting mechanism 4, the tensioning jack can move and lift precisely within a large range, greatly expanding the coverage area of ​​a single tensioning operation and improving equipment utilization.

[0041] In one embodiment, a first stiffening plate 24 is provided between the second support plate 22 and the side surface of the column 11.

[0042] Specifically, one end of the cantilever arm 31 and the inclined support arm 32 are welded to each other, and the other end of the cantilever arm 31 and the inclined support arm 32 are welded to the side surface of the pivot shaft 23. A support rod 34 is also connected between the arm body of the cantilever arm 31 and the arm body of the inclined support arm 32.

[0043] Specifically, a second stiffening plate 33 is provided between the other end of the cantilever arm 31 and the side surface of the pivot shaft 23.

[0044] A first stiffening plate 24 and a second stiffening plate 33 are added between the column 11 and the support plate and pivot shaft 23 to strengthen the key stress-bearing parts, ensure the structural stability and durability under long-term high-intensity operation, and meet the needs of repeated tensioning operations.

[0045] In one embodiment, the self-propelled electric hoist 41 includes a traveling wheel 42, and the side end of the boom 31 is provided with a track for supporting the movement of the traveling wheel 42. The boom 31 is provided with limit devices 43 on both sides located in the traveling direction of the self-propelled electric hoist 41. The limit device 43 includes a limit seat and a rubber pad block provided on the limit seat.

[0046] By setting up a track and limiting device 43, the tensioning jack can be automatically and smoothly moved to the designated position and lifted, reducing manual intervention and lowering operational risks. The limiting device 43 adopts a limiting seat and rubber pad design, which can effectively limit the travel range of the electric hoist, prevent equipment impact or falling due to misoperation, and improve on-site safety.

[0047] The prestressing tensioning fixture 100 can be integrated into the cantilever beam-forming machine 5, such as an upper-bearing truss type, an upper-bearing box girder type, a lower-bearing truss type, or a lower-bearing box girder type cantilever beam-forming machine. For example, an upper-bearing truss type cantilever beam-forming machine... Figure 3 As shown, the connecting plate 121 at the bottom of the column 11 of the prestressing tensioning tool 100 is bolted to the front inverted U-shaped gantry beam 51 of the upper-bearing truss type cantilever beam making machine. During operation, the tensioning jack is lifted by the self-propelled electric hoist 41 to carry out the prestressing tensioning operation.

[0048] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pre-stress tensioning operation tool, characterized in that, include: The load-bearing support mechanism (1) includes a column (11), the column (11) includes a first end and a second end arranged opposite to each other, and the first end of the column (11) is provided with a connection structure (12) for connecting to the cantilever beam-making machine (5). The steering mechanism (2) includes a first support plate (21) and a second support plate (22) disposed at the second end of the column (11) and disposed opposite to each other along the axial direction. A pivot shaft (23) extending along the axial direction of the column (11) is rotatably connected between the first support plate (21) and the second support plate (22). The cantilever extension beam (3) includes a cantilever arm (31) extending radially along the column (11) and connected to the pivot shaft (23), and a diagonal brace arm (32) connected to the cantilever arm (31) and connected to the pivot shaft (23). A triangular support structure is formed between the cantilever arm (31), the diagonal brace arm (32) and the pivot shaft (23). The lifting mechanism (4) includes a self-propelled electric hoist (41) that can move along the boom (31) and is used to lift tension jacks.

2. The pre-stress tensioning operation tool according to claim 1, characterized in that, The connecting structure (12) includes two connecting plates (121) connected by bolts. One of the connecting plates (121) is welded to the gantry beam (51) of the cantilever beam machine (5), and the other connecting plate (121) is welded to the first end of the column (11) and a reinforcing plate (122) is provided between the connecting plate (121) and the column (11) and arranged in a ring along the column (11).

3. The pre-stress tensioning operation tool according to claim 1, characterized in that, The first support plate (21) is welded to the top of the column (11), and the second support plate (22) is welded to the side surface of the column (11). Both the first support plate (21) and the second support plate (22) are provided with reserved holes. The pivot shaft (23) is provided with pivot pins (231) that pass through and rotatably connect to the corresponding two reserved holes at both axial ends.

4. The pre-stress tensioning operation tool according to claim 1, characterized in that, A first stiffening plate (24) is provided between the second support plate (22) and the side surface of the column (11).

5. The pre-stress tensioning operation tool according to claim 1, characterized in that, One end of each of the cantilever arm (31) and the inclined support arm (32) is welded to each other, and the other end of each of the cantilever arm (31) and the inclined support arm (32) is welded to the side surface of the pivot shaft (23). A support rod (34) is also connected between the arm body of the cantilever arm (31) and the arm body of the inclined support arm (32).

6. The pre-stress tensioning operation tool according to claim 1, characterized in that, The other end of each of the cantilever arm (31) and the diagonal brace arm (32) is provided with a second stiffening plate (33) between it and the side surface of the pivot shaft (23).

7. The pre-stress tensioning operation tool according to claim 1, characterized in that, The self-propelled electric hoist (41) includes a traveling wheel (42), and the side end of the boom (31) is provided with a track for supporting the movement of the traveling wheel (42). The boom (31) is provided with limit devices (43) on both sides located in the traveling direction of the self-propelled electric hoist (41). The limit device (43) includes a limit seat and a rubber pad block provided on the limit seat.

8. A cantilever beam forming machine characterized by, Includes the prestressing tensioning tooling as described in any one of claims 1-7.

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