Temporary supporting device for girder falling of large steel structure bridge

Abstract

The utility model discloses a temporary supporting device for girder falling of a large steel structure bridge, which relates to the technical field of steel structure bridges and comprises a trapezoidal upper support and a trapezoidal lower support, the trapezoidal upper support is positioned above the trapezoidal lower support, and trapezoidal side supports are arranged on the left and right sides of the trapezoidal upper support and the trapezoidal lower support. A synchronous driving mechanism is arranged between the opposite faces of the upper trapezoid support and the lower trapezoid support, a lifting limiting mechanism is arranged on the front side of the upper trapezoid support and the front side of the lower trapezoid support, and the synchronous driving mechanism comprises a hanging ring. According to the temporary supporting device for the bridge support unloading block, the trapezoid upper support, the trapezoid lower support, the trapezoid side supports, the hanging ring, the hanging plate, the right-hand and left-hand threaded rod, the limiting nut, the telescopic rod and the rotating handle are matched with one another, so that the height of the whole temporary supporting device for the bridge support unloading block can be controlled to be rapidly and freely adjusted without rotating the nuts on the two sides one by one by means of tools; and the adjusting efficiency and the dismounting efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of steel structure bridge technology, specifically to a temporary support device for lowering beams of large steel structure bridges. Background Technology

[0002] Temporary support devices are essential components during the lowering of steel bridge beams. Currently, commonly used temporary support methods include wooden temporary supports, concrete temporary supports, and steel structure temporary supports. Steel structure temporary supports include bridge bearing sling blocks. The existing technologies have the following problems:

[0003] Because the existing temporary support device for bridge bearing unloading blocks requires rotating the pentagonal nuts on both sides of the threaded rod when adjusting the height or disassembling it to lower the height, the trapezoidal steel structure on both sides moves in opposite directions and the trapezoidal steel structure at the top also lowers. However, in actual operation, since the pentagonal nuts are distributed on both sides, rotating a single nut cannot lower the height. Both nuts must be rotated one by one, making the height adjustment process quite laborious. Utility Model Content

[0004] This utility model provides a temporary support device for lowering beams of large steel structure bridges to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A temporary support device for lowering beams of a large steel bridge includes a trapezoidal upper support and a trapezoidal lower support. The trapezoidal upper support is located above the trapezoidal lower support. Trapezoidal side supports are provided on both the left and right sides of the trapezoidal upper and lower supports. A synchronous drive mechanism is provided between the opposite surfaces of the trapezoidal upper and lower supports. A lifting and limiting mechanism is provided on the front side of the trapezoidal upper and lower supports. The synchronous drive mechanism includes a lifting ring. A lifting plate is fixedly installed on the top of the lifting ring. The lifting plate is fixedly installed at the bottom of the trapezoidal upper support. A positive and negative threaded rod is movably installed on the inner ring of the lifting plate. The outer walls of the positive and negative threaded rods are respectively provided with opposite threaded walls on the left and right sides. Limit nuts are threaded on the outer walls of the two threaded walls respectively. A rotating handle is provided at the left end of the positive and negative threaded rods. Telescopic rods are fixedly installed at the bottom of the two limit nuts.

[0007] A further improvement of this utility model is that: both trapezoidal side supports are provided with through holes that extend from left to right, and the left and right ends of the positive and negative threaded rods respectively pass through the two through holes to the opposite sides of the two trapezoidal side supports.

[0008] A further improvement of the present invention is that the lifting and limiting mechanism includes a threaded ring and a sliding ring, the sliding ring being located above the threaded ring, the threaded ring being fixedly installed on the front side of the lower trapezoidal support, and the sliding ring being fixedly installed on the front side of the upper trapezoidal support.

[0009] A further improvement of this utility model is that: a hexagonal bolt is threaded on the inner ring of the threaded ring, a sliding rod is fixedly installed on the top of the hexagonal bolt, the sliding ring is slidably connected to the sliding rod, and an anti-loosening nut is threaded on the upper part of the outer wall of the sliding ring.

[0010] A further improvement of this utility model is that: a hexagonal slot is provided at the left end of the positive and negative threaded rod, and a hexagonal card is fixedly installed at the center of the right side of the rotating handle, and the hexagonal card engages with the hexagonal slot.

[0011] A further improvement of this utility model is that threaded holes are provided on the lower left and right sides of the trapezoidal lower support, and limit slide rods are threadedly installed on the inner rings of the two threaded holes. Limiting discs are fixedly installed on the ends of the two limit slide rods away from the trapezoidal lower support, and the two telescopic rods are slidably connected to the two limit slide rods respectively.

[0012] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0013] 1. This utility model provides a temporary support device for the lowering of beams in large steel structure bridges. Through the cooperation of trapezoidal upper support, trapezoidal lower support, trapezoidal side support, lifting ring, lifting plate, positive and negative threaded rod, limit nut, telescopic rod, and rotating handle, the height of the temporary support device for the unloading block of the overall bridge support can be quickly and arbitrarily adjusted without the need to rotate the nuts on both sides one by one with tools, thereby improving the adjustment efficiency and disassembly efficiency.

[0014] 2. This utility model provides a temporary support device for lowering beams of large steel structure bridges. Through the cooperation between the disassembled and detachable lifting and limiting mechanism, hexagonal slot, hexagonal plate, threaded hole, and limiting slide rod, the height can be quickly adjusted without affecting the disassembly and assembly of the overall temporary support device, which is convenient for transportation and rapid on-site assembly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the synchronous drive mechanism of the present invention.

[0017] Figure 3 This is a schematic diagram of the lifting and limiting mechanism of the present invention.

[0018] Figure 4 This is a schematic diagram showing the separation of the rotary handle and the positive and negative threaded rod in the structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the limiting slide bar of the present invention.

[0020] In the diagram: 1. Trapezoidal upper support; 2. Trapezoidal lower support; 21. Threaded hole; 22. Limiting slide rod; 23. Limiting plate; 3. Trapezoidal side support; 4. Synchronous drive mechanism; 41. Lifting ring; 42. Lifting plate; 43. Positive and negative threaded rod; 431. Hexagonal slot; 44. Limiting nut; 45. Telescopic rod; 46. Rotating handle; 461. Hexagonal clamping plate; 5. Lifting and limiting mechanism; 51. Threaded ring; 52. Sliding ring; 53. Hexagonal bolt; 54. Slide rod; 55. Anti-loosening nut. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 , Figure 2 As shown, this utility model provides a temporary support device for lowering beams of a large steel structure bridge, including a trapezoidal upper support 1 and a trapezoidal lower support 2. The trapezoidal upper support 1 is located above the trapezoidal lower support 2. Trapezoidal side supports 3 are provided on both the left and right sides of the trapezoidal upper support 1 and the trapezoidal lower support 2. A synchronous drive mechanism 4 is provided between the opposite surfaces of the trapezoidal upper support 1 and the trapezoidal lower support 2. A lifting and limiting mechanism 5 is provided on the front side of the trapezoidal upper support 1 and the trapezoidal lower support 2. The synchronous drive mechanism 4 includes a lifting ring 41, and a hanging plate 42 is fixedly installed on the top of the lifting ring 41. Fixedly installed at the bottom of the trapezoidal upper support 1, the inner ring of the hanging plate 42 is movably installed with a positive and negative threaded rod 43. The outer walls of the positive and negative threaded rod 43 are respectively provided with threaded walls with opposite threads on the left and right sides, and the outer walls of the two threaded walls are respectively threaded with limit nuts 44. The left end of the positive and negative threaded rod 43 is provided with a rotating handle 46. The bottom of the two limit nuts 44 is fixedly installed with a telescopic rod 45. The two trapezoidal side supports 3 are respectively provided with through holes that pass through the left and right sides, and the left and right ends of the positive and negative threaded rod 43 pass through the two through holes to the opposite sides of the two trapezoidal side supports 3.

[0023] When it is necessary to raise the trapezoidal upper support 1, rotating the rotating handle 46 will drive the entire positive and negative threaded rod 43 to rotate through the movable connection of the inner ring of the lifting ring 41 fixed to the bottom of the hanging plate 42. This rotation, combined with the threaded connection between the opposite threads on the left and right sides of the outer wall of the positive and negative threaded rod 43 and the threads of the two limit nuts 44, will drive the two limit nuts 44 to move closer together, compressing the trapezoidal side support 3. This utilizes the inclined surfaces of the two trapezoidal side support 3 on the outer wall of the positive and negative threaded rod 43 and the inclined surfaces on the left and right sides of the trapezoidal lower support 2. The contact causes the height of the trapezoidal side support 3 to rise, and at the same time, the height of the trapezoidal upper support 1 rises with the rise of the trapezoidal side support 3. When the positive and negative threaded rod 43 is raised, the telescopic rod 45 will also extend and retract. Similarly, rotating the handle 46 in reverse will reverse the positive and negative threaded rod 43, thereby separating the two limit nuts 44 from each other. This allows the trapezoidal side support 3 to slide to both sides on the outer wall of the positive and negative threaded rod 43, and at the same time lowers the height of the trapezoidal upper support 1, making it convenient to remove the entire temporary support device after the auxiliary support is completed.

[0024] like Figure 3 As shown, the lifting limit mechanism 5 includes a threaded ring 51 and a sliding ring 52. The sliding ring 52 is located above the threaded ring 51. The threaded ring 51 is fixedly installed on the front side of the trapezoidal lower support 2, and the sliding ring 52 is fixedly installed on the front side of the trapezoidal upper support 1. A hexagonal bolt 53 is threaded on the inner ring of the threaded ring 51. A slide rod 54 is fixedly installed on the top of the hexagonal bolt 53. The sliding ring 52 is slidably connected to the slide rod 54. An anti-loosening nut 55 is threaded on the upper outer wall of the sliding ring 52.

[0025] When the trapezoidal upper support 1 is raised or lowered, the sliding connection between the sliding ring 52 on its front side and the slide rod 54 is used to maintain the stability of the raising and lowering. At the same time, when disassembling, the slide rod 54 can be separated from the inner ring of the threaded ring 51 by rotating the hex bolt 53, and then the anti-loosening nut 55 can be rotated off the outer wall of the slide rod 54 to pull the entire slide rod 54 downward to complete the disassembly.

[0026] like Figure 4 , Figure 5 As shown, a hexagonal slot 431 is provided at the left end of the positive and negative threaded rod 43, and a hexagonal plate 461 is fixedly installed at the center of the right side of the rotating handle 46. The hexagonal plate 461 is engaged with the hexagonal slot 431. Threaded holes 21 are provided on the lower left and right sides of the trapezoidal lower support 2. Limiting slide rods 22 are threadedly installed on the inner ring of the two threaded holes 21. Limiting discs 23 are fixedly installed at the ends of the two limiting slide rods 22 away from the trapezoidal lower support 2. The two telescopic rods 45 are slidably connected to the two limiting slide rods 22 respectively.

[0027] When the threaded rod 43 moves the overall limiting nut 44, the sliding connection between the telescopic rod 45 and the limiting slide rod 22 is used to limit the movement, ensuring the stability of the left and right movement of the limiting nut 44. By pulling the rotating handle 46 outward, the hexagonal plate 461 is separated from the hexagonal slot 431 opened at the left end of the threaded rod 43, so that both ends of the threaded rod 43 are unobstructed. Then, the two limiting slide rods 22 are rotated using the limiting plate 23 that limits the telescopic rod 45, and can be rotated and removed from the threaded hole 21. Thus, the two limiting nuts 44 and the telescopic rod 45 can be rotated and removed from the left and right sides of the outer wall of the threaded rod 43. Then, the two trapezoidal side supports 3 can be directly pulled out from the left and right sides of the outer wall of the threaded rod 43, so that the trapezoidal upper support 1, together with the threaded rod 43, can be separated from the trapezoidal upper support 1, realizing the disassembly of the overall temporary support device, which is convenient for transportation and on-site assembly.

[0028] The working principle of the temporary support device for lowering the beams of this large steel structure bridge will be explained in detail below.

[0029] like Figure 1-5As shown, when it is necessary to raise the trapezoidal upper support 1, rotating the rotating handle 46 will drive the entire positive and negative threaded rod 43 to rotate through the movable connection of the inner ring of the lifting ring 41 fixed to the bottom of the hanging plate 42. This rotation, combined with the threaded connection between the opposite threads on the left and right sides of the outer wall of the positive and negative threaded rod 43 and the threads of the two limit nuts 44, will drive the two limit nuts 44 to move closer together, compressing the trapezoidal side support 3. The contact between the inclined surfaces of the two trapezoidal side support 3 on the outer wall of the positive and negative threaded rod 43 and the inclined surfaces on the left and right sides of the trapezoidal lower support 2 will cause the trapezoidal side support 3 to... As the height increases, the height of the trapezoidal upper support 1 also increases along with the height of the trapezoidal side support 3. Simultaneously, when the positive and negative threaded rod 43 moves the overall limiting nut 44, the sliding connection between the telescopic rod 45 and the limiting slide rod 22 provides a limit, ensuring stability for left and right movement. Furthermore, when the positive and negative threaded rod 43 is raised, the telescopic rod 45 also extends and contracts. Similarly, rotating the handle 46 in reverse reverses the positive and negative threaded rod 43, causing the two limiting nuts 44 to separate. This allows the trapezoidal side support 3 to slide to both sides on the outer wall of the positive and negative threaded rod 43, while simultaneously allowing the trapezoidal upper support... The height of support 1 decreases, making it easier to remove the entire temporary support device after the auxiliary support is completed. When the trapezoidal upper support 1 is raised or lowered, the sliding connection between the sliding ring 52 on its front side and the slide rod 54 maintains the stability of the raising and lowering. At the same time, during disassembly, the slide rod 54 can be separated from the inner ring of the threaded ring 51 by rotating the hexagonal bolt 53, and then the anti-loosening nut 55 can be rotated to remove it from the outer wall of the slide rod 54. The entire slide rod 54 can then be pulled downwards. At the same time, the rotating handle 46 can be pulled outwards to separate the hexagonal locking plate 461 from the hexagonal locking groove 431 opened at the left end of the positive and negative threaded rod 43, so that... With both ends of the threaded rod 43 unobstructed, the two limiting slide rods 22 can be rotated out of the threaded hole 21 by the limiting plate 23 that limits the telescopic rod 45. This allows the two limiting nuts 44 and the telescopic rod 45 to be rotated and removed from the left and right sides of the outer wall of the threaded rod 43. Then, the two trapezoidal side supports 3 can be pulled out from the left and right sides of the outer wall of the threaded rod 43. This allows the trapezoidal upper support 1, along with the threaded rod 43, to be separated from the trapezoidal upper support 1, thus disassembling the entire temporary support device for easy transportation and on-site assembly.

[0030] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A temporary support device for lowering beams of a large steel structure bridge, comprising a trapezoidal upper support (1) and a trapezoidal lower support (2), characterized in that: The trapezoidal upper support (1) is located above the trapezoidal lower support (2). Trapezoidal side supports (3) are provided on both the left and right sides of the trapezoidal upper support (1) and the trapezoidal lower support (2). A synchronous drive mechanism (4) is provided between the opposite surfaces of the trapezoidal upper support (1) and the trapezoidal lower support (2). A lifting limit mechanism (5) is provided on the front side of the trapezoidal upper support (1) and the trapezoidal lower support (2). The synchronous drive mechanism (4) includes a lifting ring (41). A top of the lifting ring (41) is fixedly installed with... A hanging plate (42) is fixedly installed at the bottom of a trapezoidal upper support (1). A positive and negative threaded rod (43) is movably installed on the inner ring of the hanging plate (42). The outer walls of the positive and negative threaded rod (43) are respectively provided with threaded walls with opposite threads on the left and right sides. Limiting nuts (44) are threaded on the outer walls of the two threaded walls respectively. A rotating handle (46) is provided at the left end of the positive and negative threaded rod (43). Telescopic rods (45) are fixedly installed at the bottom of the two limiting nuts (44).

2. The temporary support device for lowering beams of a large steel structure bridge according to claim 1, characterized in that: Both trapezoidal side supports (3) are provided with through holes that extend from left to right, and the left and right ends of the positive and negative threaded rods (43) respectively pass through the two through holes to the opposite sides of the two trapezoidal side supports (3).

3. A temporary support device for lowering beams of a large steel structure bridge according to claim 1, characterized in that: The lifting and limiting mechanism (5) includes a threaded ring (51) and a sliding ring (52). The sliding ring (52) is located above the threaded ring (51). The threaded ring (51) is fixedly installed on the front side of the trapezoidal lower support (2), and the sliding ring (52) is fixedly installed on the front side of the trapezoidal upper support (1).

4. A temporary support device for lowering beams of a large steel structure bridge according to claim 3, characterized in that: The inner ring of the threaded ring (51) is threaded with a hexagonal bolt (53), and a sliding rod (54) is fixedly installed on the top of the hexagonal bolt (53). The sliding ring (52) is slidably connected to the sliding rod (54), and an anti-loosening nut (55) is threaded on the upper part of the outer wall of the sliding ring (52).

5. A temporary support device for lowering beams of a large steel structure bridge according to claim 1, characterized in that: The left end of the positive and negative threaded rod (43) is provided with a hexagonal slot (431), and a hexagonal plate (461) is fixedly installed at the center of the right side of the rotating handle (46), and the hexagonal plate (461) is engaged with the hexagonal slot (431).

6. A temporary support device for lowering beams of a large steel structure bridge according to claim 1, characterized in that: The trapezoidal lower support (2) has threaded holes (21) on both sides below. The inner rings of the two threaded holes (21) are threaded with limit slide rods (22). The ends of the two limit slide rods (22) away from the trapezoidal lower support (2) are fixedly installed with limit plates (23). The two telescopic rods (45) are slidably connected to the two limit slide rods (22).

Images