A lifting spreader for long-span multi-point lifting

Abstract

The utility model discloses a kind of lifting spreader for large-span multi-hanging point, including upper box girder, lower box girder, several anchor boxes, steel cable, several hanging point structures, lifting point structure;The anchor box is set on the upper end of upper box girder, lower box girder two sides, and is connected through steel cable between same side anchor box.The hanging point structure is set in lower box girder lower part.The lifting spreader for large-span multi-hanging point proposed in the utility model is connected by steel cable structure to form combined spreader with double-layer beam, can significantly improve the carrying capacity of spreader, by setting cable structure connecting node between two side beam bodies, the super-large span of original single beam is decomposed into multiple small-span stress units, the bending moment value is greatly reduced, the load transfer demand of large-interval hanging point can be effectively coped with, the structural safety and construction stability in the overall lifting process of steel truss are guaranteed.In connecting structure, the present application is suitable for the connection of single lifting point and multiple hanging points, and can be flexibly used in hoisting operation.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, specifically a lifting equipment for large spans and multiple lifting points. Background Technology

[0002] In the overall lifting construction of steel trusses, lifting points need to be set on the truss structure to achieve lifting operations. To distribute the force on each lifting point and ensure the safety of the steel truss structure, the actual number of lifting points on the truss will be much greater than the number of points on the overall lifting equipment (such as a crane). To achieve an effective connection between the lifting points and the hoisting points, specialized lifting equipment is required. Currently, the commonly used lifting equipment is the single-beam lifting equipment. When the spacing between the steel truss lifting points is large, the span of the single-beam lifting equipment becomes too large under the load of multiple lifting points, causing excessive bending moment effects. This can easily exceed the strength design requirements of the lifting equipment beam, seriously affecting the structural safety during the lifting process. To improve safety, the cross-sectional area of ​​the lifting equipment beam needs to be increased, resulting in a significant increase in the weight of the lifting equipment and poor economic efficiency. Summary of the Invention

[0003] The purpose of this utility model is to provide a lifting device for large spans and multiple lifting points, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a lifting device for large-span, multi-point lifting, comprising an upper box girder, a lower box girder, several anchor boxes, steel cables, several lifting point structures, and a lifting point structure. The anchor boxes are located on both sides of the upper and lower box girder, and are connected to each other by steel cables. The lifting point structure is located at the lower part of the lower box girder.

[0005] Furthermore, there are four anchor boxes, including an upper anchor box and a lower anchor box; the upper anchor box and the lower anchor box include two parallel side plates and a load-bearing plate. The side plates are triangular or irregular plates, and the load-bearing plate is welded between the side plates. They are arranged obliquely to the top surface of the upper and lower box beams and are parallel to the load-bearing plates of the upper and lower anchor boxes on the same side; steel cable through holes are provided on the load-bearing plates, and the steel cables pass through the steel cable through holes and are anchored at both ends by anchor plates.

[0006] Furthermore, the upper anchor box side plate of the upper anchor box is a triangular plate, and the lower anchor box side plate of the lower anchor box is an irregular quadrilateral plate. The anchor box also includes reinforcing plates. There are two upper anchor box reinforcing plates in the upper anchor box, which are set between the upper anchor box side plates. Their shapes are consistent with the upper anchor box side plates. The bottom is welded to the top surface of the upper anchor box, and the other end is welded to the load-bearing plate. The two upper anchor box reinforcing plates are arranged in parallel. The load-bearing plate of the lower anchor box is set at a preset distance from the end face of the lower anchor box side plate away from the lower box beam. There are two lower anchor box reinforcing plates in the lower anchor box, which are set in the area between the load-bearing plate of the lower anchor box and the end face of the lower anchor box side plate away from the lower box beam. The two lower anchor box reinforcing plates are arranged in parallel.

[0007] Furthermore, the lifting point structure includes a cable passage hole, a pressure plate, an anchor plate, and a lifting steel cable disposed on the upper box girder; the pressure plate is fixedly disposed below the upper box girder by welding, and a through hole is provided in the center of the plate, which is coaxial with the cable passage hole. The lifting steel cable passes through the cable passage hole and the pressure plate, and is fixed at the bottom by the anchor plate.

[0008] Furthermore, each suspension point structure includes two parallel and oppositely arranged ear plates, with suspension holes at the bottom of the ear plates.

[0009] Furthermore, the lifting device also includes a detachable lifting point for use with it. The detachable lifting point includes a top cover, two side boxes, a fixing sleeve, and several fastening bolts. A lifting ring is provided in the center of the upper part of the top cover. The side boxes are arranged opposite each other and include a C-shaped clamping part and a fastening part. Several through holes are provided in the fastening part, and the fastening bolts pass through the through holes. The upper part of the fixing sleeve is provided with a groove with the same outer diameter as the steel pipe at the lifting point of the steel truss.

[0010] Furthermore, the top cover of the detachable lifting point is provided with limiting protrusions on both sides, and the C-shaped clamp of the side box is provided with downward side box limiting protrusions on the inner side of the top surface.

[0011] This utility model proposes a lifting device for large spans with multiple lifting points. It connects double-layer beams using a steel cable structure to form a combined lifting device, significantly improving its load-bearing capacity. By setting cable structure connection nodes between the two beams, the original large span of a single beam is decomposed into multiple small-span load-bearing units, greatly reducing the bending moment value. This effectively addresses the load transfer requirements of large-spacing lifting points, ensuring structural safety and construction stability during the overall lifting of the steel truss. Regarding the connection structure, this application is applicable to connecting a single lifting point with multiple lifting points, allowing for flexible application in lifting operations. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0013] Figure 2 This is a front view of the second embodiment of this utility model.

[0014] Figure 3 This is a partial enlarged view of the upper box girder in the second embodiment of this utility model.

[0015] Figure 4 This is a partial enlarged view of the upper anchor box area in the second embodiment of this utility model.

[0016] Figure 5 This is a schematic diagram of the first embodiment of the detachable lifting point of this utility model.

[0017] Figure 6 This is a schematic diagram of the second embodiment of the detachable lifting point of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] As attached Figure 1-4 As shown, the lifting device involved in this utility model includes an upper box beam 1, a lower box beam 2, several anchor boxes 3, steel cables 4, several lifting point structures 5, and lifting point structures 6.

[0020] The upper box girder 1 and the lower box girder 2 are welded from steel plates. In one embodiment of the applicant's work, 25mm steel plates are used for welding.

[0021] As attached Figure 1 As shown in Figure 2, there are four anchor boxes 3, which are respectively set on both sides of the upper end of the upper box beam 1 and the lower box beam 2, and the anchor boxes 3 are connected by steel cables 4. Specifically, the anchor boxes 3 include an upper anchor box 31 and a lower anchor box 32.

[0022] As attached Figure 1 , 2 As shown in Figure 3, the upper anchor box 31 and the lower anchor box 32 include side plates and load-bearing plates. The side plates are triangular or irregular plates, wherein the upper anchor box side plate 311 of the upper anchor box 31 is a triangular plate, as shown in the attached figure. Figure 4 As shown, the lower anchor box side plate 321 of the lower anchor box 32 is an irregular quadrilateral plate. The upper anchor box side plate 311 and the lower anchor box side plate 321 are two pieces, arranged in parallel, and welded to the top of the upper box beam 1 or the lower box beam 2 at the bottom. The load-bearing plate a is welded between the side plates, arranged obliquely to the top surface of the upper box beam 1 and the lower box beam 2, and arranged parallel to the load-bearing plate a of the upper anchor box 31 and the lower anchor box 32 on the same side.

[0023] To improve the strength of the upper anchor box 31 and the lower anchor box 32, reinforcing plates are also included. The upper anchor box 31 has two reinforcing plates 312, which are set between the upper anchor box side plates 311. The shape is consistent with the upper anchor box side plates 311. The bottom is welded to the top surface of the upper anchor box 31, and the other end is welded to the stress plate a. The two upper anchor box reinforcing plates 312 are arranged in parallel.

[0024] The stress plate a of the lower anchor box is set at a preset distance from the end face of the lower anchor box side plate 321 away from the lower box beam 2. There are two lower anchor box reinforcing plates 322, which are set in the area between the stress plate a of the lower anchor box and the end face of the lower anchor box side plate away from the lower box beam 2. The two lower anchor box reinforcing plates 322 are arranged in parallel.

[0025] A cable through-hole a1 is provided on the load-bearing plate a. The cable 4 passes through the cable through-hole a1 and is anchored at both ends by anchor plates m. The anchor plates include anti-detachment devices. First, the cable 4 is passed through the cable through-hole a1 of the load-bearing plate a, which is to be connected to the upper anchor box 31 and the lower anchor box 32. Then, anchor plates m1 are installed at both ends. Specifically, the anchor plates m1 are set on one side of the load-bearing plate a. Each strand of the cable 4 is passed through the hole in the anchor plate and fixed. After that, the anti-detachment device is installed.

[0026] As attached Figure 1 , 3 The lifting point structure 6 shown includes a cable passage 61, a pressure plate 62, an anchor plate m, and a lifting steel cable 63, all provided in the upper box girder 1.

[0027] The pressure plate 62 is fixedly installed below the upper box girder 1 by welding. It has a through hole in the center, which is coaxial with the cable passage hole 61. In use, the lifting steel cable 63 is first passed through the cable passage hole 61, and the lower part is fixed by the anchor plate. The upper part of the lifting steel cable 63 is connected to the lifting device, such as a crane.

[0028] The specific structure of the anchor plate and the anti-detachment device m2, as well as the connection method with the steel cable, are standard knowledge in the field of steel cable connection.

[0029] In one embodiment by the applicant, the lifting cable 63 includes 19 strands of steel wire, and the cable 4 includes 12 strands of steel wire, with the specific specifications adapted to the lifting weight of the lifting device.

[0030] As attached Figure 1 As shown, the lifting point structure 5 is located at the lower part of the lower box girder 2. As shown in the figure, each lifting point structure 5 includes two parallel and oppositely arranged ear plates 51. The lower part of the ear plate 51 is provided with a lifting hole 52. When in use, the lifting point of the steel truss h is inserted between the ear plates 51, and then the pin is passed through the lifting hole 52 and the through hole on the lifting point to realize the connection between the lifting device and the steel truss.

[0031] The lifting points of the steel truss are generally welded directly to the steel truss. To further improve the utilization rate of the lifting points and facilitate the adjustment of the lifting point positions according to the balance point of the steel truss, as shown in the attached document... Figure 5 As shown in Figure 6, this application also provides a detachable lifting point for use with the above-mentioned lifting device.

[0032] As attached Figure 5 As shown, the detachable lifting point 7 includes a top cover 71, two side boxes 72, a fixing sleeve 73, and several fastening bolts 74.

[0033] A lifting ring 711 is provided in the center of the upper part of the top cover 71, and limit protrusions 712 are provided on both sides (in the width direction) of the top cover. The side boxes 72 are arranged opposite to each other and include a C-shaped clamping part 721 and a fastening part 722. Several through holes are provided in the fastening part, and fastening bolts 74 pass through the through holes to fix the oppositely arranged side boxes 72.

[0034] The C-shaped clamping part 721 of the side box 72 has a downward side box limiting protrusion 723 on the inner side of its top surface, and a slot is provided in the center of the top surface to facilitate the extension of the lifting ring 711.

[0035] To prevent the steel truss from moving at the lifting points, a fixing sleeve 73 is also provided. The upper part of the fixing sleeve has a groove with the same outer diameter as the steel pipe at the lifting point of the steel truss.

[0036] In use, the fixing sleeve 73 is put on the outside of the steel truss, then the top cover 71 is placed on the upper part of the steel truss, and then the side box 72 is placed on the outside of the top cover 71. The C-shaped clamp 721 covers the top cover 71, the fixing sleeve 73, and the steel truss. Then the fastening bolts 74 are tightened to fix the lifting point.

[0037] Different sizes of steel pipes can be adapted by selecting different sizes of fixing sleeves 73 and side boxes 72.

[0038] Furthermore, as shown in the attached document. Figure 6 As shown, an upper fastening part 724 can also be provided on the upper part of the C-shaped clamping part 721 of the side box 72. The upper fastening part 724 is provided with through holes and fastening bolts 74, which can further improve the firmness of the lifting point.

[0039] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A lifting device for large spans with multiple lifting points, characterized in that, It includes an upper box girder, a lower box girder, several anchor boxes, steel cables, several lifting point structures, and a hoisting point structure; the anchor boxes are located on both sides of the upper and lower box girder, and the anchor boxes on the same side are connected by steel cables. The lifting point structures are located at the lower part of the lower box girder.

2. The lifting device according to claim 1, characterized in that, There are four anchor boxes, including an upper anchor box and a lower anchor box. Each upper and lower anchor box includes two parallel side plates and a load-bearing plate. The side plates are triangular or irregular plates. The load-bearing plate is welded between the side plates and is arranged obliquely to the top surface of the upper and lower box beams. The load-bearing plates of the upper and lower anchor boxes on the same side are arranged parallel to each other. There are steel cable through holes on the load-bearing plates. The steel cables pass through the steel cable through holes and are anchored at both ends by anchor plates.

3. The lifting device according to claim 2, characterized in that, The upper anchor box has a triangular side plate, and the lower anchor box has an irregular quadrilateral side plate. The anchor box also includes reinforcing plates. There are two upper anchor box reinforcing plates, which are placed between the upper anchor box side plates and have the same shape as the upper anchor box side plates. The bottom of the reinforcing plates is welded to the top surface of the upper anchor box, and the other end is welded to the load-bearing plate. The two upper anchor box reinforcing plates are arranged in parallel. The load-bearing plate of the lower anchor box is set at a preset distance from the end face of the lower anchor box side plate away from the lower box beam. There are two lower anchor box reinforcing plates, which are placed in the area between the load-bearing plate of the lower anchor box and the end face of the lower anchor box side plate away from the lower box beam. The two lower anchor box reinforcing plates are arranged in parallel.

4. The lifting device according to claim 1, characterized in that, The lifting point structure includes a cable passage hole set in the upper box girder, a pressure plate, an anchor plate, and a lifting steel cable; the pressure plate is fixedly set below the upper box girder by welding, and a through hole is set in the center of the plate, which is coaxial with the cable passage hole. The lifting steel cable passes through the cable passage hole and the pressure plate, and is fixed at the bottom by the anchor plate.

5. The lifting device according to claim 1, characterized in that, Each suspension point structure includes two parallel and oppositely arranged ear plates, with suspension holes at the bottom of the ear plates.

6. The lifting device according to claim 1, characterized in that, The lifting device also includes a detachable lifting point for use. The detachable lifting point includes a top cover, two side boxes, a fixing sleeve, and several fastening bolts. A lifting ring is provided in the center of the upper part of the top cover. The side boxes are arranged opposite each other and include a C-shaped clamping part and a fastening part. Several through holes are provided in the fastening part, and the fastening bolts pass through the through holes. The upper part of the fixing sleeve is provided with a slot with the same outer diameter as the steel pipe at the lifting point of the steel truss.

7. The lifting device according to claim 6, characterized in that, The top cover of the detachable lifting point is provided with limiting protrusions on both sides, and the C-shaped clamping part 721 of the side box is provided with a downward side box limiting protrusion on the inner side of the top surface.

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