Profile steel hoisting device and profile steel hoisting method

Abstract

The invention relates to the technical field of steel hoisting, and particularly discloses a profile steel hoisting device and a profile steel hoisting method. The lifting device comprises a lifting cross beam, the lifting cross beam is provided with an upper clamping plate and an L-shaped beam, and the L-shaped beam is hinged to a first hydraulic oil cylinder; the free end of the L-shaped beam is hinged to a supporting rod, and a lower clamping plate is arranged at one end of the supporting rod. The upper clamping plate and the lower clamping plate are arranged, the lower clamping plate and the upper clamping plate are driven by the first hydraulic oil cylinder, the L-shaped beam, the second hydraulic oil cylinder and the supporting rod to clamp profile steel in the hoisting process, a steel wire rope is replaced in the hoisting process, and the steel wire rope only plays a certain role at the beginning and the end of the hoisting process; according to the hoisting method through the device, the friction loss of the steel wire rope caused by profile steel edges and corners is avoided, the risk caused by steel wire rope breakage is completely eradicated, and the safety coefficient is improved.

Description

Technical Field

[0001] This invention relates to the field of steel hoisting technology, and particularly to a steel section hoisting device and a steel section hoisting method. Background Technology

[0002] Section steel is a type of steel, and there are many types and specifications of section steel, such as channel steel, angle steel, I-beams, and H-beams. In the hoisting process of section steel, steel wire ropes are usually hung at both ends of the cross section for hoisting. Since section steel has sharp edges, the steel wire ropes will be worn during hoisting. Damaged steel wire ropes will have uneven stress and are prone to breakage, thus posing a serious safety hazard. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this invention provides a steel section hoisting device with a high safety factor, and also provides a steel section hoisting method.

[0004] This invention is achieved through the following technical solution: A steel section hoisting device includes a lifting beam with a lifting ring in the middle and lifting hooks at both ends. The device is characterized by two upper clamping plates perpendicular to the beam on its lower surface, and an L-shaped beam hinged to each end of the upper surface. Each L-shaped beam is hinged to the output end of a first hydraulic cylinder, which is also hinged to the upper surface of the beam. A second hydraulic cylinder is hinged to each L-shaped beam, and a support rod is hinged to the free end of the L-shaped beam. One end of the support rod has a lower clamping plate perpendicular to the beam, and the other end of the support rod is hinged to the output end of the second hydraulic cylinder.

[0005] The upper clamping plate and the lower clamping plate are located in different facades. The upper clamping plate has upper auxiliary plates at both ends pointing downwards, and the two upper auxiliary plates are arranged in a V-shape. The lower clamping plate has lower auxiliary plates at both ends pointing upwards, and the two lower auxiliary plates are arranged in a V-shape.

[0006] The lower clamping plate is hinged to the support rod.

[0007] The support rod has a slot, and an arc-shaped plate is fixed on the back of the lower clamping plate. The arc-shaped plate passes through the slot and is provided with a limiting rod.

[0008] The lifting beam has grooves at both ends facing the middle, and the L-shaped beam can enter the grooves. Long strip-shaped through slots are opened on both sides of the grooves. The L-shaped beam is equipped with a hinge shaft, which forms a cross shape with the L-shaped beam. The hinge shaft is located in the long strip-shaped through slot.

[0009] On both sides of the groove on the lifting beam, there are also 7-shaped plates. A sliding plate is provided in the 7-shaped plate. One end of the sliding plate is hinged to the connecting rod, and the other end of the connecting rod is hinged to the L-shaped beam. When the L-shaped beam is laid down, the outer end of the sliding plate is located above the end of the L-shaped beam.

[0010] A method for hoisting structural steel sections, characterized by the following steps: First, the structural steel section is tied together with two steel wire ropes. Then, the steel wire ropes are attached to the lifting hook, and the crane hook is attached to the lifting ring. The section is then lifted. After the structural steel section leaves the ground, the first hydraulic cylinder is activated, causing the L-shaped beam to rotate into the groove. The second hydraulic cylinder is then activated, causing the support rod to rotate. The lower clamping plate automatically adjusts its position after contacting the structural steel section, pressing against it and clamping the section together with the upper clamping plate. At this point, the section can be lifted. To remove the structural steel section, the second hydraulic cylinder is activated first, causing the support rod to flip back to its original position. Then, the first hydraulic cylinder is activated, causing the L-shaped beam to return to its original position. The crane is then started, and the structural steel section is slowly lowered. The steel wire ropes are then removed.

[0011] The beneficial effects of this invention are: This invention features an upper clamping plate and a lower clamping plate. The lower clamping plate, driven by a first hydraulic cylinder, an L-shaped beam, a second hydraulic cylinder, and a support rod, clamps the steel section during hoisting, replacing the steel wire rope. The steel wire rope only plays a minor role at the beginning and end of the hoisting process. This hoisting method avoids frictional wear on the steel wire rope from the sharp edges of the steel section, eliminates the risk of steel wire rope breakage, and improves the safety factor.

[0012] The present invention incorporates a sliding plate that moves with the L-shaped beam. During the lifting process, the sliding plate exerts a pressing effect on the L-shaped beam, thereby improving the safety factor of the lifting operation. Attached Figure Description

[0013] The invention will now be further described with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main view structure used in this invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 for Figure 3 A schematic diagram of the local structure along the C-axis; Figure 5 for Figure 2 A schematic diagram of the local structure along the B-axis; Figure 6 for Figure 2 A structural schematic diagram of the L-shaped beam along the D-direction; Figure 7 for Figure 2Structural diagram of the lifting beam in direction D; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure in the FF direction; Figure 9 for Figure 2 Schematic diagram showing the positional relationship between the L-shaped beam and the sliding plate; Figure 10 for Figure 2 A schematic diagram of a partial cross-sectional structure along the EE direction.

[0014] In the diagram, 1 is the lifting beam, 2 is the lifting ring, 3 is the lifting hook, 4 is the upper clamping plate, 5 is the upper auxiliary plate, 6 is the first hydraulic cylinder, 7 is the groove, 8 is the long strip through groove, 9 is the L-shaped beam, 10 is the hinge shaft, 11 is the 7-shaped plate, 12 is the sliding plate, 13 is the connecting rod, 14 is the support rod, 15 is the second hydraulic cylinder, 16 is the lower clamping plate, 17 is the arc plate, 18 is the limit rod, 19 is the lower auxiliary plate, 20 is the spring, 21 is the slot, and 22 is the recessed part. Detailed Implementation

[0015] The attached figures illustrate specific embodiments of the present invention.

[0016] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0018] like Figures 1 to 10 As shown, this type of steel hoisting device includes a lifting beam 1, a lifting ring 2 for connecting with a crane installed in the middle of the lifting beam 1, two lifting hooks 3 installed on the lower surface of the lifting beam 1, and two upper clamping plates 4 fixedly installed on the lower surface of the lifting beam 1. The two upper clamping plates 4 are parallel and perpendicular to the lifting beam 1 respectively. Upper auxiliary plates 5 extend downward from both ends of the upper clamping plates 4. The included angle between the two upper auxiliary plates 5 and the upper clamping plates 4 is greater than 90°, that is, the two upper auxiliary plates 5 are in a figure-eight shape.

[0019] Two first hydraulic cylinders 6 are hinged to the upper surface of the lifting beam 1. The two first hydraulic cylinders 6 are in opposite directions, and their output ends are both facing the end of the lifting beam 1.

[0020] A groove 7 is cut inward at both ends of the lifting beam 1. The groove 7 is long and narrow. A long through groove 8 is cut on each of the two side walls of the groove 7. An L-shaped beam 9 can be placed in the groove 7. The inner end of the L-shaped beam 9 has a hinge shaft 10. The hinge shaft 10 and the L-shaped beam 9 are in a cross shape. The two ends of the hinge shaft 10 pass through the long through groove 8. The output end of the first hydraulic cylinder 6 is hinged to the L-shaped beam 9.

[0021] like Figure 8 As shown, the bottom of the groove 7 has a downwardly recessed portion 22 so that the lower end of the L-shaped beam 9 can rotate easily during rotation.

[0022] When the L-shaped beam 9 is laid down, it can be flush with or lower than the upper surface of the lifting beam 1.

[0023] On both sides of the groove 7, a 7-shaped plate 11 is installed. The two 7-shaped plates 11 form a T-shaped groove. Inside the T-shaped groove formed by the two 7-shaped plates 11, there is a sliding plate 12. The two ends of a connecting rod 13 are respectively hinged to the L-shaped beam 9 and the sliding plate 12.

[0024] When L-beam 9 is laid down, as Figure 2 and Figure 9 As shown, the outer end of the sliding plate 12 is located on the end of the L-shaped beam 9, thus pressing down on the L-shaped beam 9.

[0025] If, when the L-beam 9 is lowered, the upper surface of the L-beam 9 is lower than the upper surface of the lifting beam 1, then the sliding plate 12 can be made as follows: Figure 10 The arrangement is such that the sliding plate 12 can always be in contact with the L-shaped beam 9.

[0026] A support rod 14 is hinged to the free end of the L-shaped beam 9, and the support rod 14 is hinged to the output end of the second hydraulic cylinder 15, which is hinged to the L-shaped beam 9.

[0027] The free end of the support rod 14 is hinged to the lower clamping plate 16. During use, the lower clamping plate 16 is parallel to the upper clamping plate 4, but not in the same vertical plane. The hinge between the lower clamping plate 16 and the support rod 14 is relatively tight and requires external force to rotate; it is not the kind that can rotate freely.

[0028] To prevent the lower clamping plate 16 and the support rod 14 from rotating freely, the following design can also be used: A slot 21 is made in the support rod 14, and an arc-shaped plate 17 is installed on the back of the lower clamping plate 16. After the arc-shaped plate 17 passes through the slot 21, a limiting rod 18 is set to prevent the arc-shaped plate 17 from coming out of the slot 21.

[0029] Lower auxiliary plates 19 extend from both ends of the lower clamping plate 16. The angle between the lower auxiliary plates 19 and the lower clamping plate 16 is greater than 90°, that is, the two lower auxiliary plates 19 are in a figure-eight shape.

[0030] like Figure 4 As shown, the upper auxiliary plate 5 and the upper clamping plate 4, and the lower auxiliary plate 19 and the lower clamping plate 16 can also be made into a telescopic type by means of spring 20. Specifically, the two ends of the upper clamping plate 4 and the lower clamping plate 16 are made into a cylindrical structure, the spring 20 is located inside the cylindrical structure, and the upper auxiliary plate 5 and the lower auxiliary plate 19 are fixedly connected to the spring 20 respectively.

[0031] A method for hoisting structural steel sections includes the following steps: First, the structural steel section is tied together with two steel wire ropes. Then, the steel wire ropes are hung on the lifting hook 3, and the crane hook is hooked onto the lifting ring 2. The section is then lifted. After the structural steel section leaves the ground, the first hydraulic cylinder 6 is activated. The first hydraulic cylinder 6 drives the L-shaped beam 9 to rotate into the groove 7. The second hydraulic cylinder 15 is activated, which drives the support rod 14 to rotate. After the lower clamping plate 16 contacts the structural steel section, it automatically adjusts its position so that it presses against the structural steel section and clamps the structural steel section together with the upper clamping plate 4. At this point, the section can be lifted. When unloading the structural steel section, the second hydraulic cylinder 15 is activated first to make the support rod 14 flip back to its original position. Then, the first hydraulic cylinder 6 is activated to make the L-shaped beam 9 return to its original position. The crane is then started, and the structural steel section is slowly lowered. The steel wire ropes are then removed.

[0032] During hoisting, if the steel section is long, the L-beam 9 may get stuck on the steel section and unable to rotate. In this case, continue to activate the first hydraulic cylinder 6 to gradually flatten the L-beam 9 until it is completely flat (referring to the part that enters the groove 7). At this point, the L-beam 9 may extend beyond the end of the steel section. In this case, the output end of the first hydraulic cylinder 6 can be retracted so that it pushes against the end of the steel section. Alternatively, it can remain in place. In this case, the vertical part of the L-beam 9 will be some distance from the end of the steel section, but this will not affect the hoisting of the steel section.

[0033] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0037] Except for the technical features described in the specification, all other technical features are known to those skilled in the art.

Claims

1. A steel section hoisting device, comprising a lifting beam (1), wherein a lifting ring (2) is provided in the middle of the lifting beam (1), and lifting hooks (3) are respectively provided at both ends of the lifting beam (1), characterized in that, The lower surface of the lifting beam (1) is provided with two upper clamping plates (4) perpendicular to the lifting beam (1). An L-shaped beam (9) is hinged to each end of the upper surface of the lifting beam (1). Each L-shaped beam (9) is hinged to the output end of a first hydraulic cylinder (6). The first hydraulic cylinder (6) is hinged to the upper surface of the lifting beam (1). The L-shaped beam (9) is hinged to a second hydraulic cylinder (15). The free end of the L-shaped beam (9) is hinged to a support rod (14). One end of the support rod (14) is provided with a lower clamping plate (16). The lower clamping plate (16) is perpendicular to the lifting beam (1). The other end of the support rod (14) is hinged to the output end of the second hydraulic cylinder (15).

2. The steel hoisting device according to claim 1, characterized in that, The upper clamping plate (4) and the lower clamping plate (16) are located in different facades. The upper clamping plate (4) has upper auxiliary plates (5) at both ends downward, and the two upper auxiliary plates (5) are in a figure-eight shape. The lower clamping plate (16) has lower auxiliary plates (19) at both ends upward, and the two lower auxiliary plates (19) are in a figure-eight shape.

3. The steel section hoisting device according to claim 2, characterized in that, The lower clamping plate (16) is hinged to the support rod (14).

4. The steel section hoisting device according to claim 3, characterized in that, The support rod (14) has a slot (21), and an arc plate (17) is fixed on the back of the lower clamping plate (16). The arc plate (17) is provided with a limiting rod (18) after passing through the slot (21).

5. The steel section hoisting device according to any one of claims 1 to 4, characterized in that, The lifting beam (1) has grooves (7) at both ends towards the middle. The L-shaped beam (9) can enter the groove (7). The groove (7) has long through slots (8) on both sides. The L-shaped beam (9) has a hinge shaft (10). The hinge shaft (10) and the L-shaped beam (9) are in a cross shape. The hinge shaft (10) is located in the long through slot (8).

6. The steel section hoisting device according to claim 5, characterized in that, in The groove (7) on the lifting beam (1) is provided with a 7-type plate (11) on both sides. The 7-type plate (11) is provided with a sliding plate (12). The sliding plate (12) is hinged to one end of the connecting rod (13). The other end of the connecting rod (13) is hinged to the L-shaped beam (9). When the L-shaped beam (9) is laid down, the outer end of the sliding plate (12) is located above the end of the L-shaped beam (9).

7. A method for hoisting structural steel, characterized by: First, tie the steel section together with two steel wire ropes, then hang the steel wire ropes on the lifting hook (3), hook the crane hook onto the lifting ring (2), and lift. After the steel section leaves the ground, start the first hydraulic cylinder (6). The first hydraulic cylinder (6) drives the L-shaped beam (9) to rotate into the groove (7). Start the second hydraulic cylinder (15) to drive the support rod (14) to rotate. After the lower clamping plate (16) contacts the steel section, it automatically adjusts its position so that it presses against the steel section and clamps the steel section together with the upper clamping plate (4). At this time, it can be lifted. When unloading the steel section, first start the second hydraulic cylinder (15) to make the support rod (14) flip back to its original position, then start the first hydraulic cylinder (6) to make the L-shaped beam (9) return to its original position, start the crane, and slowly lower the steel section. Then remove the steel wire rope.

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