A hoisting point reinforcing plate structure for integral lifting of a steel truss

Abstract

The present application relates to the technical field of lifting point reinforcing plate, in particular to a lifting point reinforcing plate structure for overall lifting of steel truss, comprising a metal sleeve, two metal sleeves are arranged on the steel truss I-beam, a plurality of clamping blocks are inserted on the two parallel side plates of the metal sleeve, and a limiting frame is fixed on the two parallel side plates of the metal sleeve, a plug-in block is inserted in the limiting frame, and the plug-in block pushes the clamping block to tightly clamp the steel truss I-beam; the beneficial effect is that the symmetrical I-shaped metal sleeve clamps the steel truss I-beam, and the cooperation of the clamping block, rubber sheet, plug-in block and limiting frame realizes multi-point uniform elastic clamping and fixing, the traditional single-point welding receiving mode is abandoned, the lifting load can be effectively dispersed, the local stress concentration problem is eliminated, the overall bearing strength and anti-deformation capacity of the lifting point are greatly improved, and the safety hazard of lifting point fracture failure is fundamentally avoided.

Description

Technical Field

[0001] This invention relates to the field of lifting point reinforcement plate technology, specifically a lifting point reinforcement plate structure for the overall lifting of steel trusses. Background Technology

[0002] In the overall lifting construction process of steel trusses, the lifting point structure is the core load-bearing component that ensures the safety of truss hoisting, relocation, and positioning operations, directly determining the stability and safety of the overall construction. Currently, for the overall lifting of steel truss I-beams on construction sites, the common method is to directly weld lifting lugs onto the surface of the I-beam as the lifting point load-bearing structure. This traditional construction method is simple and inexpensive, but it has many inherent defects in practical application. First, the welding of the lugs to the I-beam is a single-point local welding fixation, and the hoisting load is concentrated on the weld and the local plate position, which can easily cause stress concentration in the weld. Under the conditions of lifting heavy-tonnage trusses, hoisting swaying, and vibration, problems such as weld cracking, lug bending, or even overall fracture can easily occur, posing a great construction safety hazard. Secondly, traditional welded ear plates are fixed structures, and the hoisting ropes are in direct, hard contact with the metal of the ear plate rope holes. During the hoisting process, the ropes repeatedly rub against the rope holes, which not only wears down the hoisting ropes quickly, reducing their service life and increasing the risk of breakage, but also causes wear and deformation of the ear plate rope holes, resulting in decreased hoisting point accuracy and poor stress stability.

[0003] Meanwhile, welded ear plates are one-time fixed structures, and once worn or damaged, they cannot be replaced locally. Repairs can only be made by cutting and re-welding, a cumbersome process with low construction efficiency. Furthermore, repeated welding damages the I-beam base material, reducing the overall structural strength of the steel truss. In addition, traditional ear plates rely solely on their own sheet metal for load-bearing capacity, lacking auxiliary reinforcement, buffering, and anti-slip structures. During hoisting, slight slippage or displacement of the lifting points can easily occur, leading to uneven stress on the steel truss. This can easily cause the truss to tilt and sway, affecting the stability of the overall lifting operation and making it difficult to meet the high-precision, high-safety requirements of lifting large-span, heavy-tonnage steel trusses. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting point reinforcement plate structure for the overall lifting of steel trusses, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lifting point reinforcement plate structure for integral lifting of a steel truss, comprising two metal sleeves, both of which are fitted onto the steel truss I-beam. Multiple clamping blocks are inserted into the two parallel side plates of each metal sleeve, and a limit frame is fixed to each of the two parallel side plates. Inserts are inserted into the interior of the limit frames, and the inserts push the clamping blocks to tightly clamp the steel truss I-beam. A lifting frame is fitted and fixed to the outer side of the metal sleeve, and a protruding shank is integrally formed on the top of the lifting frame, with a wear-resistant sleeve inserted into the surface of the protruding shank.

[0006] Preferably, the metal sleeve is an "I"-shaped frame, and each of the two parallel side plates of the metal sleeve has a reserved opening, with each reserved opening corresponding to a clamping block. Each of the two parallel side walls of the metal sleeve has a rubber sheet fixed on it, which covers multiple reserved openings. The width of the clamping block is greater than the depth of the reserved openings. One end of the clamping block is fixed to the surface of the rubber sheet, and the other end of the clamping block has a bevel.

[0007] Preferably, the surface of the limiting frame has two through holes, and a rubber pad is fixed to the inner wall of the limiting frame. The rubber pad is located between the two through holes. Two screws are fixed to one end of the insert block that extends into the limiting frame. After the screws pass through the through holes, washers and nuts are fitted on them. After the insert block is inserted into the limiting frame, it pushes the clamping block to retract into the reserved opening and squeezes the rubber sheet to undergo elastic deformation.

[0008] Preferably, after the nut and screw are screwed together and locked, the rubber pad is held between the insert block and the limiting frame and undergoes elastic deformation.

[0009] Preferably, the lifting frame is a square ring plate, and reinforcing connecting plates are integrally formed on the two parallel side plates of the lifting frame, and the reinforcing connecting plates are fixed to the outer wall of the metal sleeve.

[0010] Preferably, the surface of the protruding handle has a rope opening, the wear-resistant sleeve is inserted into the rope opening, and reinforcing ribs are fixed on both sides of the protruding handle, with the bottom surface of the reinforcing ribs fixed to the top surface of the metal sleeve.

[0011] Preferably, the length of the wear-resistant sleeve is greater than the depth of the hole at the rope opening. Both ends of the wear-resistant sleeve have annular side grooves on their outer walls. A baffle is fitted above the side grooves, and a "U"-shaped groove is formed at the bottom of the baffle. The two sides of the baffle are slidably connected to the notches formed on the surfaces of the two reinforcing ribs.

[0012] Preferably, the bottom end of the baffle is screwed with an anti-loosening screw, which passes through the baffle and is screwed into a screw groove opened on the surface of the convex shank.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The steel truss overall lifting point reinforcement plate structure proposed in this invention uses symmetrically arranged I-shaped metal sleeves to cover and clamp the steel truss I-beams. Combined with clamping blocks, rubber sheets, inserts, and limiting frames, it achieves multi-point uniform elastic clamping and fixation, abandoning the traditional single-point welding stress mode. This effectively disperses the lifting load, eliminates local stress concentration problems, and significantly improves the overall load-bearing strength and deformation resistance of the lifting points, fundamentally avoiding the safety hazards of lifting point fracture failure. Simultaneously, the elastic cooperation of the rubber sheets and rubber pads compensates for assembly gaps, increases clamping friction, prevents slippage and loosening of the metal sleeves during lifting, and also provides a buffering and shock-absorbing effect, reducing the damage to the structure from lifting vibrations and significantly improving the stability and safety of lifting operations. This invention further strengthens the load-bearing performance of the lifting points through the integrated load-bearing structure of the metal sleeves and external lifting frame, forming multiple layers with reinforcing connecting plates and reinforcing ribs. The reinforced structure effectively improves the structural stability of the lifting point, preventing deformation and damage under lifting stress. A detachable wear-resistant sleeve is installed inside the rope opening to completely isolate the rope from direct friction with the metal rope hole, effectively protecting the lifting point structure and lifting ropes, significantly reducing equipment wear and construction risks. Furthermore, the wear-resistant sleeve can be quickly and individually removed and replaced after wear, without disassembling the entire lifting point structure, making maintenance convenient and cost-effective. In addition, the invention adopts a prefabricated clamping and fixing structure, eliminating the need for welding operations and preventing damage to the steel truss I-beam base material. The structure can be repeatedly disassembled and reused, adapting to lifting operations of steel truss I-beams of different specifications. Its versatility, practicality, and construction adaptability are significantly improved, effectively solving the industry pain points of cumbersome modification of traditional welded lifting points, high material consumption, and poor safety. This greatly optimizes the construction process of overall steel truss lifting, improving construction efficiency and safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 This is a schematic diagram of the connection structure between the metal sleeve and the lifting frame of the present invention; Figure 5 for Figure 4 Cross-sectional view of the structure at point CC; Figure 6 for Figure 4 Sectional view of the structure at point DD; Figure 7 This is a schematic diagram of the insert structure of the present invention; Figure 8 This is a schematic diagram of the lifting frame structure of the present invention; Figure 9This is a schematic diagram of the baffle structure of the present invention; Figure 10 This is a schematic diagram of the reinforcing rib structure of the present invention; Figure 11 This is a schematic diagram of the wear-resistant sleeve structure of the present invention.

[0015] In the diagram: 1. Metal sleeve, 101. Reserved opening, 102. Rubber sheet, 103. Clamping block, 2. Limiting frame, 201. Perforation, 202. Rubber pad, 3. Insert block, 301. Screw, 302. Nut, 4. Lifting frame, 401. Protruding handle, 402. Rope opening, 403. Reinforcing connecting plate, 404. Reinforcing rib, 405. Groove, 5. Wear-resistant sleeve, 501. Side groove, 6. Baffle, 601. Anti-loosening screw, 7. Steel truss I-beam. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1 to 11 This invention provides a technical solution: a lifting point reinforcement plate structure for the overall lifting of a steel truss, mainly used for the reinforcement and protection of lifting points during the overall lifting operation of the steel truss I-beam 7. It effectively solves the technical problems of easy breakage, poor safety, and high wear and tear associated with traditional welded ear plate lifting methods. The overall structure is easy to assemble, firmly fixed, and allows for partial replacement of components, significantly improving lifting stability and safety. This structure mainly includes two symmetrically arranged metal sleeves 1, which are respectively fitted onto the outer ends of the steel truss I-beam 7, serving as the core clamping and bearing base for the overall lifting, providing a stable support foundation for subsequent lifting forces.

[0018] Specifically, the metal sleeve 1 is designed as an I-shaped frame structure, adapted to the shape of the steel truss I-beam 7, and can tightly fit and cover the outside of the I-beam to ensure uniform stress distribution. Multiple pre-drilled openings 101 are evenly distributed on the two parallel side plates of the metal sleeve 1. Each pre-drilled opening 101 has a corresponding clamping block 103 inserted into it, achieving the alignment and assembly of the clamping components. Simultaneously, rubber sheets 102 are fixedly attached to the outer walls of the two parallel side plates of the metal sleeve 1. These rubber sheets 102 completely cover all the pre-drilled openings 101 on the corresponding side plates, sealing and protecting the gaps in the pre-drilled openings 101 to prevent dust and impurities from entering the structural gaps during construction and affecting assembly accuracy and clamping stability. One end of the clamping block 103 is fixedly connected to the inner surface of the rubber sheet 102, and the overall width of the clamping block 103 is greater than the depth of the reserved opening 101, which can ensure that the clamping block 103 can stably expand and contract inside the reserved opening 101 without falling off or shifting. The other end of the clamping block 103 is set as an inclined surface structure, which can form an inclined surface extrusion fit with the subsequent insert block 3, greatly reducing the resistance of the insert extrusion and realizing the smooth pushing and shrinking of the clamping block 103.

[0019] A limiting frame 2 is fixedly installed on the outer side of the metal sleeve 1 corresponding to the reserved opening 101. The limiting frame 2 is a hollow frame structure, and its internal cavity is aligned with the inclined end of the clamping block 103, allowing the insertion block 3 to be vertically inserted and assembled. Two through holes 201 are symmetrically opened on the surface of the limiting frame 2. The two through holes 201 are vertically aligned. At the same time, a rubber pad 202 is fixedly attached to the middle of the inner wall of the limiting frame 2, so that the rubber pad 202 is exactly in the area between the two through holes 201. Correspondingly, two symmetrically arranged screws 301 are fixedly connected to one end of the insertion block 3 that extends into the limiting frame 2. The distance between the two screws 301 matches the distance between the two through holes 201, allowing precise penetration through the through holes 201 to complete the alignment and assembly.

[0020] During the actual assembly and clamping operation, the metal sleeve 1 is first placed on the preset hoisting position of the steel truss I-beam 7. At this time, the end of the clamping block 103 with the bevel will naturally extend out of the reserved opening 101 and partially extend into the internal cavity of the limiting frame 2, reserving a stroke for subsequent compression clamping. Then, the insert block 3 is vertically inserted from the opening of the limiting frame 2. During the downward movement of the insert block 3, its side wall will gradually squeeze the beveled ends of multiple clamping blocks 103, continuously pushing all clamping blocks 103 to retract synchronously into the corresponding reserved opening 101. During this process, the clamping block 103 will squeeze the rubber sheet 102 in the opposite direction, causing the rubber sheet 102 to undergo elastic deformation, thereby allowing the inner end face of the clamping block 103 to tightly fit and press against the outer wall surface of the steel truss I-beam 7, achieving multi-point uniform clamping and fixing. By utilizing the elastic deformation properties of the rubber sheet 102, not only can the assembly gap be compensated, but the friction between the clamping block 103 and the steel truss I-beam 7 can also be greatly increased, preventing the metal sleeve 1 from slipping or loosening during hoisting and ensuring the stability of the clamping and fixing.

[0021] After the insert block 3 is fully pushed into the limiting frame 2 and the clamping block 103 completes the locking and clamping, the two screws 301 at the end of the insert block 3 will simultaneously pass through the corresponding through holes 201 on the limiting frame 2. At this time, washers and nuts 302 are sequentially fitted at the protruding ends of the screws 301, and the screw connection is locked and fixed by tightening the nuts 302. After locking, the rubber pad 202 inside the limiting frame 2 will be tightly clamped between the insert block 3 and the inner wall of the limiting frame 2 and undergo elastic deformation. On the one hand, it can fill the assembly gap between the insert block 3 and the limiting frame 2, limit the vertical and lateral displacement of the insert block 3, and prevent the insert block 3 from loosening or shifting due to hoisting vibration. On the other hand, it can play a buffering and shock absorption role, weaken the impact of vibration during hoisting on the overall clamping structure, further improve the overall tightness and stability of the structure, and completely eliminate the risk of the insert block 3 falling off and failing.

[0022] To achieve the lifting load-bearing function, a lifting frame 4 is fixedly fitted onto the outer side of the metal sleeve 1. The lifting frame 4 is a square ring plate structure that tightly covers and fixes itself to the outside of the metal sleeve 1, forming an integrated load-bearing structure with the metal sleeve 1 to jointly bear the lifting load, disperse the pressure of single points, and avoid structural damage caused by local stress concentration. Reinforcing connecting plates 403 are integrally formed on the two parallel side plates of the lifting frame 4. The reinforcing connecting plates 403 are fixed to the outer wall of the metal sleeve 1 by welding or bolting, which can significantly improve the connection strength between the lifting frame 4 and the metal sleeve 1, preventing separation or cracking during lifting. Simultaneously, a protruding shank 401 is integrally formed at the center of the top of the lifting frame 4, serving as the core load-bearing part for the lifting ropes. A through-hole rope opening 402 is provided in the middle of the plate of the protruding shank 401 for threading the lifting ropes.

[0023] To enhance the load-bearing capacity of the shank 401, reinforcing ribs 404 are symmetrically arranged on both sides of the shank 401. The top of the reinforcing rib 404 is integrally formed with the side wall of the shank 401, and the bottom surface is fixedly connected to the top surface of the metal sleeve 1. The triangular reinforcement structure further enhances the structural strength and deformation resistance of the shank 401, effectively preventing the shank 401 from bending or breaking during hoisting. At the same time, notches 405 are provided on the opposite surfaces of the reinforcing ribs 404 on both sides to match the sliding assembly of the subsequent baffle 6, thereby achieving the limited installation of the baffle 6.

[0024] A wear-resistant sleeve 5 is inserted into the rope opening 402. The overall length of the wear-resistant sleeve 5 is greater than the depth of the hole in the rope opening 402, allowing both ends of the wear-resistant sleeve 5 to protrude from the end faces of the rope opening 402, completely isolating the lifting rope from direct contact with the rope opening 402. During lifting operations, the lifting rope passes through the inside of the wear-resistant sleeve 5. Through the isolation and protection provided by the wear-resistant sleeve 5, direct friction and wear on the metal structure of the rope opening 402 by the rope are avoided, effectively protecting the lifting stress-bearing parts of the lifting frame 4, significantly extending the service life of the overall lifting point structure, and reducing the safety hazard of rope wear and breakage.

[0025] To prevent the wear-resistant sleeve 5 from slipping out of the rope opening 402 during hoisting, annular grooves 501 are provided on the outer walls of both ends of the wear-resistant sleeve 5, and baffles 6 are installed above the grooves 501. The bottom of the baffle 6 has a U-shaped groove that fits snugly into the groove 501 of the wear-resistant sleeve 5. Simultaneously, the two ends of the baffle 6 are slidably connected to the notches 405 of the reinforcing ribs 404 on both sides, achieving vertical positioning of the baffle 6 and ensuring its stable position without displacement. An anti-loosening screw 601 is threaded through the bottom of the baffle 6. The threaded bottom of the anti-loosening screw 601 is screwed into a pre-set threaded groove on the surface of the shank 401, and the baffle 6 is fixedly positioned by threaded locking. The baffle 6 can precisely lock into the groove 501 of the wear-resistant sleeve 5, restricting the axial movement and detachment of the wear-resistant sleeve 5 and ensuring the assembly stability of the wear-resistant sleeve 5. Meanwhile, the assembly structure is easy to disassemble and assemble. When the wear-resistant sleeve 5 is severely worn or its protection fails after long-term use, the wear-resistant sleeve 5 can be quickly replaced simply by unscrewing the anti-loosening screw 601 and removing the baffle 6. There is no need to disassemble the entire hoisting structure, making maintenance and replacement convenient and reducing usage costs.

[0026] During actual construction and assembly, the aforementioned metal sleeves 1 and matching hoisting components need to be symmetrically installed at both ends of the steel truss I-beam 7. The hoisting points at both ends are simultaneously stressed, ensuring balanced force and stable lifting during the overall lifting of the steel truss. During hoisting operations, the hoisting ropes pass sequentially through the wear-resistant sleeves 5 inside the protruding shanks 401 at both ends. The load is jointly borne and transferred by the hoisting frame 4 and the metal sleeves 1. Compared to the traditional steel truss hoisting method that relies solely on the welded ear plates on the surface of the I-beam for stress, this structure abandons the weak mode of single-point welding stress. Through an integrated clamping and bearing structure design with multi-point uniform stress, it completely solves the problems of easy fatigue fracture of welded ear plates and poor hoisting safety, significantly improving the safety, stability, and reliability of the overall steel truss lifting operation. At the same time, the structure can be repeatedly disassembled and reused, adapting to the hoisting operations of steel truss I-beams of different specifications, making it more versatile and practical.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting point reinforcement plate structure for integral lifting of a steel truss, comprising two metal sleeves (1), both metal sleeves (1) being fitted onto the steel truss I-beam (7), characterized in that: Multiple clamping blocks (103) are inserted into the two parallel side plates of the metal sleeve (1), and a limit frame (2) is fixed on the two parallel side plates of the metal sleeve (1). A plug (3) is inserted into the inside of the limit frame (2). The plug (3) pushes the clamping block (103) to tightly clamp the steel truss I-beam (7). A lifting frame (4) is fixed on the outside of the metal sleeve (1). A convex handle (401) is integrally formed on the top of the lifting frame (4). A wear-resistant sleeve (5) is inserted into the surface of the convex handle (401).

2. The lifting point reinforcement plate structure for integral lifting of a steel truss according to claim 1, characterized in that: The metal sleeve (1) is an "I" shaped frame. The two parallel side plates of the metal sleeve (1) are provided with reserved openings (101). The reserved openings (101) and the clamping blocks (103) correspond one-to-one. Rubber sheets (102) are fixed on the two parallel side walls of the metal sleeve (1). The rubber sheets (102) cover multiple reserved openings (101). The width of the clamping block (103) is greater than the depth of the reserved openings (101). One end of the clamping block (103) is fixed to the surface of the rubber sheet (102). The other end of the clamping block (103) is provided with a slope.

3. The lifting point reinforcement plate structure for integral lifting of a steel truss according to claim 2, characterized in that: The surface of the limiting frame (2) has two through holes (201). A rubber pad (202) is fixed on the inner wall of the limiting frame (2). The rubber pad (202) is located between the two through holes (201). Two screws (301) are fixed at one end of the insert (3) that extends into the limiting frame (2). After the screws (301) pass through the through holes (201), washers and nuts (302) are fitted on them. After the insert (3) is inserted into the limiting frame (2), it pushes the clamping block (103) into the reserved opening (101) and squeezes the rubber sheet (102) to undergo elastic deformation.

4. The lifting point reinforcement plate structure for integral lifting of a steel truss according to claim 3, characterized in that: After the nut (302) and screw (301) are screwed and locked, the rubber pad (202) is held between the insert block (3) and the limiting frame (2) and undergoes elastic deformation.

5. The lifting point reinforcement plate structure for integral lifting of a steel truss according to claim 1, characterized in that: The lifting frame (4) is a square ring plate. The two parallel side plates of the lifting frame (4) are integrally formed with reinforcing connecting plates (403), which are fixed to the outer wall of the metal sleeve (1).

6. The lifting point reinforcement plate structure for integral lifting of a steel truss according to claim 1, characterized in that: The surface of the convex handle (401) is provided with a rope opening (402), and the wear-resistant sleeve (5) is inserted into the rope opening (402). Both sides of the convex handle (401) are fixed with reinforcing ribs (404), and the bottom surface of the reinforcing ribs (404) is fixed to the top surface of the metal sleeve (1).

7. The lifting point reinforcement plate structure for integral lifting of a steel truss according to claim 6, characterized in that: The length of the wear-resistant sleeve (5) is greater than the depth of the hole of the rope opening (402). Both ends of the wear-resistant sleeve (5) have annular side grooves (501) on their outer walls. A baffle (6) is fitted above the side grooves (501). A "U" shaped groove is opened at the bottom of the baffle (6). The two sides of the baffle (6) are slidably connected to the notches (405) opened on the surface of the two reinforcing ribs (404).

8. The lifting point reinforcement plate structure for integral lifting of a steel truss according to claim 7, characterized in that: The bottom end of the baffle (6) is screwed with an anti-loosening screw (601), which passes through the baffle (6) and is screwed into the screw groove opened on the surface of the shank (401).

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