A longitudinal steel bar hoisting device for beam yards
By using the design of I-beam crossbeams and chain structures, the problem of steel bar deformation during the hoisting of the box girder's longitudinal steel bars was solved, achieving uniform stress distribution and ensuring the smooth progress of the hoisting process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY NO 5 ENG GRP NO 6 ENG CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-05-26
AI Technical Summary
In railway construction, the longitudinal steel bars of box girders are long and heavy, making them difficult to handle manually. They are also prone to bending and deformation during hoisting. Existing hoisting methods result in concentrated stress on the middle or both ends of the steel bars, affecting their use.
I-beams are used as hangers, with chains and connecting lugs. The gantry crane is used to distribute the tension evenly, and the reinforcing bars are limited by chains and stops to ensure that the reinforcing bars are evenly stressed along their length, thus avoiding deformation caused by concentrated stress.
This ensures that the longitudinal reinforcement of the box girder is evenly stressed during hoisting, avoiding bending deformation of the reinforcement and ensuring smooth subsequent use.
Smart Images
Figure CN224279488U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a steel bar hoisting device, and more particularly to a longitudinal steel bar hoisting device for beam yards. Background Technology
[0002] During railway construction, box girders are prefabricated in precast beam yards. These box girders involve a large variety and quantity of reinforcing bars. Generally, the reinforcing bars are initially processed according to requirements in a steel bar processing workshop before being hoisted to the site. The longitudinal reinforcing bars of box girders are typically 25-40m long, with large spans, making manual transport of bundled bars difficult. Hoisting equipment is usually used to hoist and transport the bars by binding the middle or both ends with wire ropes. However, the longitudinal reinforcing bars are long and heavy, especially for box girders over 30m in length. When using this method, the upward force on the reinforcing bars is concentrated in the middle or both ends during hoisting, easily causing bending under their own weight, resulting in deformation and hindering subsequent use. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a longitudinal steel bar hoisting device for beam yards.
[0004] The technical solution adopted by this utility model is a longitudinal steel bar hoisting device for beam yards, including an I-beam crossbeam, on which multiple chains are movably mounted at intervals. A stop bar is provided on one side of each chain and is located below the I-beam crossbeam. Two connecting lugs are symmetrically provided near both ends on the upper part of the I-beam crossbeam. Both connecting lugs have connecting holes. The traveling trolleys of two gantry cranes are respectively hooked to the connecting lugs through the connecting holes via hooks on wire ropes.
[0005] Preferably, an L-shaped fixing plate is provided above the above-mentioned stop bar. The two fixing plates are arranged opposite each other, and the top plate of the fixing plate extends from both sides of the I-beam crossbeam inward and is fastened to the bottom plate of the I-beam crossbeam with bolts.
[0006] Preferably, the chain head passes over the I-beam crossbeam and crosses the stop bar before being fastened to the chain itself, and a lock is provided at the end of the chain.
[0007] Preferably, connecting columns are welded to both sides of the two connecting lugs, and diagonal bracing is provided between the top of the connecting columns and the I-beam. A connecting beam is welded above the diagonal bracing between the two connecting lugs at one-third of the distance from the bottom of the diagonal bracing. Multiple connecting rods are spaced apart between the bottom of the connecting beam and the diagonal bracing and the top of the I-beam.
[0008] Preferably, it also includes spacers made of wood or plastic sheeting, which are attached to the I-beam crossbeam by ropes to separate different types of reinforcing bars.
[0009] Preferably, the length of the above-mentioned I-beam crossbeam is 33-35m, and the spacing between adjacent chains is 1.3-1.5m.
[0010] Compared with the prior art, the beneficial effect of this utility model is that by setting an I-beam as a hanger for the longitudinal reinforcement of the box girder, and setting two connecting lugs on the top of the I-beam to connect with the lifting equipment, the tension of the lifting equipment is first distributed evenly by the I-beam. Multiple chains are set at intervals on the I-beam for connecting the bundled reinforcement, further balancing the tension of the lifting equipment on the reinforcement. During lifting, the reinforcement is evenly stressed along its length, solving the problem that concentrated stress in the middle or at both ends of the prior art easily causes the reinforcement to deform. Attached Figure Description
[0011] Figure 1 This is a front view of the longitudinal steel reinforcement hoisting device in the beam yard;
[0012] Figure 2 This is a top view of the longitudinal steel reinforcement hoisting device in the beam yard;
[0013] Figure 3 This is a side view of the longitudinal steel reinforcement hoisting device in the beam yard. Detailed Implementation
[0014] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.
[0015] Example 1
[0016] like Figure 1-3 As shown, a longitudinal rebar hoisting device for beam yards includes an I-beam crossbeam 1, on which multiple chains 2 are movably mounted at intervals. The length of the I-beam crossbeam 1 is 33-35m, and the spacing between adjacent chains 2 is 1.3-1.5m. It is suitable for existing longitudinal rebar hoisting in beam yards. A stop bar 3 is provided on one side of each chain 2, located below the I-beam crossbeam 1. The stop bar 3 serves both to limit the movement of the chains 2 and to provide padding between the I-beam crossbeam 1 and the ground, facilitating the adjustment of the chain 2's position. Above the I-beam crossbeam 1, near both ends... It is said that there are two connecting lugs 4, and both connecting lugs 4 have connecting holes. The traveling trolleys of the two gantry cranes are respectively hooked to the connecting lugs 4 through the connecting holes via hooks on the wire ropes. The traveling trolleys of the gantry cranes are hooked to the I-beam crossbeam 1. The tension of the lifting equipment is evenly distributed by the I-beam crossbeam 1. Multiple chains 2 are set at intervals on the I-beam crossbeam 1 for connecting the bundled steel bars, which further balances the tension of the lifting equipment on the steel bars. During lifting, the steel bars are evenly stressed along the length direction, which solves the problem that the steel bars are easily deformed by the concentrated stress in the middle or at both ends in the existing technology.
[0017] An L-shaped fixing plate 301 is provided above the stop bar 3. The two fixing plates 301 are arranged opposite each other, and the top plate of the fixing plate 301 extends from both sides of the I-beam crossbeam 1 to the inward end and is fastened to the bottom plate of the I-beam crossbeam 1 with bolts. Loosening the bolts allows the fixing plate 301 to move along the I-beam crossbeam 1. The distance of the stop bar 3 can be adjusted according to the length of the reinforcing bar, thereby limiting the position of the chain 2.
[0018] The end of chain 2 passes around the I-beam beam 1 and crosses the stop bar 3 before being fastened to chain 2 itself. This allows the stop bar 3 to limit the chain 2 on both sides. The end of chain 2 is equipped with a lock. The end of chain 2 is first wrapped with the steel bar bundle and then fastened to chain 2 itself, which facilitates connecting or releasing the steel bar.
[0019] To enhance the structural strength of the I-beam beam 1 and ensure the uniform transmission of lifting force along the I-beam beam 1, connecting columns 5 are welded to both sides of the two connecting lugs 4. A diagonal brace 6 is provided between the top of the connecting column 5 and the I-beam beam 1. A connecting beam 7 is welded above the diagonal brace 6 between the two connecting lugs 4 at one-third of the distance from the bottom of the diagonal brace 6. Multiple connecting rods 8 are spaced apart between the bottom of the connecting beam 7 and the diagonal brace 6 and the top of the I-beam beam 1.
[0020] In addition, in order to separate different types of steel bars and facilitate disassembly and use after hoisting to the position, pads 9 are attached to the I-beam beam 1 by ropes. The pads 9 are made of wood or plastic board, which has the advantages of being lightweight and having a soft surface, thus avoiding damage to the steel bars.
[0021] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.
Claims
1. A longitudinal steel bar hoisting device for beam yards, characterized in that, Includes an I-beam crossbeam (1), on which multiple chains (2) are movably mounted at intervals. A stop bar (3) is provided on one side of the chain (2). The stop bar (3) is located below the I-beam crossbeam (1). Two connecting ear plates (4) are symmetrically provided near both ends above the I-beam crossbeam (1). Both connecting ear plates (4) have connecting holes. The traveling trolleys of the two gantry cranes are respectively hooked to the connecting ear plates (4) through the connecting holes via hooks on the wire ropes.
2. The longitudinal reinforcement hoisting device for beam yards according to claim 1, characterized in that, The stop bar (3) is provided with an L-shaped fixing plate (301) above it. The two fixing plates (301) are arranged opposite each other and the top plate of the fixing plate (301) extends from both sides of the I-beam (1) to the inner end and is fastened to the bottom plate of the I-beam (1) with bolts.
3. A longitudinal steel bar hoisting device for beam yards according to claim 1 or 2, characterized in that, The head end of the chain (2) passes around the I-beam crossbeam (1) and crosses with the stop bar (3) before being fastened to the chain (2) itself. The end of the chain (2) is provided with a lock.
4. The longitudinal reinforcement hoisting device for beam yards according to claim 1, characterized in that, Both sides of the two connecting ear plates (4) are welded with connecting columns (5). The top of the connecting column (5) is provided with a diagonal brace (6) between the top of the connecting column (5) and the I-beam (1). A connecting beam (7) is welded above the diagonal brace (6) between the two connecting ear plates (4) at one-third of the distance from the bottom of the diagonal brace (6). Multiple connecting rods (8) are provided at intervals between the bottom of the connecting beam (7) and the diagonal brace (6) and the top of the I-beam (1).
5. A longitudinal steel bar hoisting device for beam yards according to claim 1, characterized in that, It also includes spacers (9), which are made of wood or plastic and are attached to the I-beam (1) by ropes to separate different types of steel bars.
6. The longitudinal reinforcement hoisting device for beam yards according to claim 1, characterized in that, The length of the I-beam (1) is 33-35m, and the spacing between adjacent chains (2) is 1.3-1.5m.