Thin-walled square tube lining type hoisting device

Abstract

This utility model relates to the field of hoisting device technology, and provides a thin-walled square tube inner-lined hoisting device, including a central connecting bracket, a central shaft, and a sliding bracket. A welding assembly is fixed at the middle position of the top of the sliding bracket, the central connecting bracket is arranged directly below the sliding bracket, and support plate connecting brackets are arranged on both sides of the bottom of the sliding bracket. This utility model supports the square tube by tightly adhering to the inner wall of the square tube through the support plate connecting brackets. Based on the principle of uniformly distributed load in mechanics, the traditional local high pressure and strong concentrated stress is dispersed into uniform stress of the entire tube wall, eliminating local stress concentration points. The isolation pad installed on the side wall of the support plate connecting bracket directly contacts the inner wall of the square tube, which can effectively avoid scratches, indentations, and dents caused by rigid contact, and comprehensively protect the outer wall coating and structural precision of the tube, thus preventing the problem of easy damage to thin-walled tubes during hoisting to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of hoisting device technology, and in particular to a thin-walled square tube liner hoisting device. Background Technology

[0002] Thin-walled square tubes are widely used in steel structures, building curtain walls, and prefabricated buildings due to their light weight, regular cross-section, and excellent mechanical properties. However, because of their thin walls, weak structural rigidity, and poor resistance to compression and deformation, conventional hoisting equipment cannot be used during factory transport, on-site hoisting, and installation. Specialized tooling is required to assist in these operations.

[0003] Currently, the mainstream methods for hoisting thin-walled square tubes in the industry include wire rope binding hoisting, external clamp hoisting, and fixed internal support hoisting. These three methods transfer the hoisting load through external binding, external clamping, and internal support constraints, respectively, and are suitable for foundation hoisting scenarios. However, some problems still exist:

[0004] While wire rope binding and hoisting offers versatility and a simple structure, the wire rope's line contact with the outer wall of the square tube results in a small stress area and high local pressure, making it highly susceptible to indentations, dents, and deformation damage to the tube's outer wall. Furthermore, the lack of a positioning and locking structure makes the tube prone to shifting and swaying during hoisting, leading to poor stability and potential safety hazards such as wire rope slippage and tube falling.

[0005] External clamping clamps rely on mechanical clamping force to fix pipes, but their hard clamping claws are prone to scratching and damaging the outer wall and anti-corrosion coating of the pipes, affecting the service life of the components. In addition, the clamping stroke is fixed, which cannot be adapted to various specifications of square tubes, resulting in poor versatility; due to the lack of a synchronous centering structure, the lifting is prone to eccentric force, which leads to lateral bending deformation of the square tubes, making it difficult to meet the requirements of high-precision construction.

[0006] Traditional fixed internal support fixtures are integral rigid structures that can only fit square tubes with a single inner diameter, resulting in low reusability and high procurement costs. These fixtures lack an adaptive expansion and adjustment structure, have poor fit with the inner wall of the tube, and are prone to loosening and shifting during hoisting. Furthermore, they lack a mechanical self-locking anti-loosening structure, have weak resistance to load fluctuations, and are prone to support failure under heavy load conditions, posing significant safety hazards.

[0007] In summary, existing hoisting technologies generally suffer from problems such as easy damage to pipes, poor stability, insufficient versatility, high cost, and prominent safety hazards, making them unsuitable for the diverse, high-precision, and high-safety construction needs of current building projects. Utility Model Content

[0008] The purpose of this invention is to provide a thin-walled square tube liner hoisting device, which solves the above-mentioned problems when used in operation.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a thin-walled square tube liner hoisting device, including a central connecting bracket, a central shaft, and a sliding bracket. The central connecting bracket is arranged directly below the sliding bracket. Support plate connecting brackets are arranged on both sides of the bottom of the sliding bracket. The central connecting bracket and the support plate connecting brackets on both sides are connected by a hinge support one. The sliding bracket and the support plate connecting brackets on both sides of the bottom are connected by a hinge support two. The central shaft is threadedly connected to the middle position inside the sliding bracket. The bottom of the central shaft is connected to the central connecting bracket. A welding assembly is threadedly connected to the outside of the central shaft, and the welding assembly is located at the top of the sliding bracket.

[0010] Preferably, one end of the hinge support is hinged to the support plate connecting bracket, and the other end of the hinge support is hinged to the middle connecting bracket.

[0011] Preferably, one end of the second hinge support is hinged to the support plate connecting bracket, and the other end of the second hinge support is hinged to the bottom of the sliding bracket.

[0012] Preferably, the rotation of the central shaft can drive the sliding bracket to move up and down axially on its exterior. The bottom of the central shaft passes through the top of the central connecting bracket and protrudes from the bottom of the central connecting bracket. The rotation of the central shaft can be achieved within the central connecting bracket.

[0013] Preferably, a connecting screw sleeve is fixed to the top of the central shaft, a first lifting ring is fixed to the top of the connecting screw sleeve, and two second lifting rings are fixed to both sides of the top of the sliding bracket.

[0014] Preferably, isolation pads are installed on the outer side wall of the support plate connecting bracket, and two isolation pads are provided on the outer side wall of each support plate connecting bracket.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model provides a thin-walled square tube inner lining hoisting device, which supports the square tube by connecting the support plate to the bracket and closely adhering to the inner wall of the square tube. Based on the principle of uniform load distribution in mechanics, it disperses the traditional local high pressure and high concentrated stress into uniform stress throughout the tube wall, eliminating local stress concentration points. The isolation pad installed on the side wall of the support plate connecting the bracket directly contacts the inner wall of the square tube, which can effectively avoid scratches, indentations and dents caused by rigid contact, and protect the outer wall coating and structural precision of the tube in all aspects, thus preventing the problem of easy damage to thin-walled tubes during hoisting to a certain extent.

[0017] Based on the continuous transmission of the central shaft and the swing-and-expansion mechanical principle of hinge support one and hinge support two, the expansion outer diameter of the support plate connecting bracket is infinitely adjustable, which can be adapted to the hoisting operation of thin-walled square tubes with various cross-sectional specifications. It breaks through the limitation of traditional fixed internal support tooling and fixed stroke lifting clamps that can only be adapted to a single specification of pipe. A single set of equipment can replace multiple sets of traditional special tooling, significantly reducing the cost of tooling procurement, storage and operation and maintenance, and adapting to the diverse construction needs of the construction site;

[0018] It adopts a double anti-loosening protection structure of trapezoidal thread self-locking and mechanical locking. The trapezoidal thread has excellent reverse load self-locking characteristics, which can effectively resist the reverse rotation torque generated by the hoisting load. Combined with the external welded component mechanical locking structure, it forms a double safety protection system, eliminating major safety hazards such as mechanism retraction, loosening, support failure and pipe slippage and falling under hoisting conditions. It is especially suitable for heavy-duty hoisting operation scenarios.

[0019] Hinge support one and hinge support two can achieve synchronous symmetrical telescopic movement. During the operation, the center of the device can always be aligned with the center of the thin-walled square tube, and there is no eccentric force throughout the process. This effectively avoids problems such as pipe tilting, swaying, and side bending that are easy to occur in traditional hoisting methods, greatly improving the stability of the hoisting process and the positioning accuracy of the pipe, and meeting the requirements of high-precision prefabricated building and steel structure construction.

[0020] The device has a compact overall structure and simple operation logic. It does not require complex auxiliary equipment. A single person can independently complete the entire process of tooling expansion, locking, shrinking and disassembly, which greatly shortens the time spent on pre-hoisting preparation and disassembly, simplifies construction procedures, reduces the difficulty of manual operation, and significantly improves the overall construction efficiency of thin-walled square tube transportation, hoisting and positioning. Attached Figure Description

[0021] Figure 1 This is a front view structural diagram of the present utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention;

[0024] Figure 4 This is a front structural sectional view of the present invention;

[0025] Figure 5 This is a top view of the structure of this utility model.

[0026] The following are the annotations in the figure: 1. Welding assembly; 2. Middle connecting bracket; 3. Central shaft; 4. Sliding bracket; 5. Support plate connecting bracket; 6. Hinge support one; 7. Hinge support two; 8. Isolation pad; 9. Connecting screw sleeve; 10. Lifting eye one; 11. Lifting eye two. Detailed Implementation

[0027] 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.

[0028] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0029] Combination Figures 1 to 5 As shown, a thin-walled square tube liner hoisting device of this utility model includes a central connecting bracket 2, a central shaft 3, and a sliding bracket 4. The central connecting bracket 2 is located directly below the sliding bracket 4. Support plate connecting brackets 5 are located on both sides of the bottom of the sliding bracket 4. The central connecting bracket 2 and the support plate connecting brackets 5 on both sides are connected by a hinge support 6. The sliding bracket 4 and the support plate connecting brackets 5 on both sides of the bottom are connected by a hinge support 7. The central shaft 3 is threadedly connected to the middle position inside the sliding bracket 4. The bottom of the central shaft 3 is connected to the central connecting bracket 2. A welding assembly 1 is threadedly connected to the outside of the central shaft 3, and the welding assembly 1 is located at the top of the sliding bracket 4.

[0030] One end of the hinge support 6 is hinged to the support plate connecting bracket 5, and the other end of the hinge support 6 is hinged to the middle connecting bracket 2.

[0031] One end of hinge support 2 7 is hinged to support plate connecting bracket 5, and the other end of hinge support 2 7 is hinged to the bottom of sliding bracket 4.

[0032] Specifically, the outer side of the central shaft 3 is provided with a trapezoidal external thread, and the inner side of the welding assembly 1 and the sliding bracket 4 is provided with a thread groove that matches the trapezoidal thread on the outer side of the central shaft 3. It should be noted that when the sliding bracket 4 moves to the desired position under the action of the central shaft 3, the bottom of the welding assembly 1 is pressed against the top of the sliding bracket 4 by rotating it to lock the position of the sliding bracket 4, so as to prevent the sliding bracket 4 from moving upward and causing the support plate connecting bracket 5 to shrink inward under the action of the sliding bracket 4, thus affecting the contact effect with the square tube.

[0033] The axial displacement of the sliding bracket 4 is driven by the rotating central shaft 3, which in turn causes the hinge support 6 and hinge support 7 to swing, thereby pushing the support plate connecting bracket 5 to expand outward and contract inward synchronously. After the device expands inside the square tube, the reverse self-locking characteristic of the trapezoidal thread, combined with the mechanical locking of the welding component 1, is used to permanently lock the expanded state, so that the support plate connecting bracket 5 is evenly attached to the inner wall of the thin-walled square tube. The surface contact uniformly distributed load replaces the traditional point and line contact load, achieving non-destructive, stable and safe hoisting.

[0034] like Figures 1 to 4 As shown, the rotation of the central shaft 3 can drive the sliding bracket 4 to move up and down along the axial direction on its outside. The bottom of the central shaft 3 is penetrated by the top of the middle connecting bracket 2 and protrudes from the bottom of the middle connecting bracket 2. The rotation of the central shaft 3 can rotate inside the middle connecting bracket 2.

[0035] A connecting screw sleeve 9 is fixed to the top of the central shaft 3, and a lifting ring 10 is fixed to the top of the connecting screw sleeve 9. Lifting rings 21 are fixed to both sides of the top of the sliding bracket 4.

[0036] An isolation pad 8 is installed on the outer wall of the support plate connecting bracket 5, and two isolation pads 8 are provided on the outer wall of each support plate connecting bracket 5. The isolation pads 8 are detachable.

[0037] Specifically,

[0038] Loosening and shrinking operation: Before operation, rotate the central shaft 3 in the opposite direction to drive the sliding support 4 to move upward, drive the hinge support 1 6 and hinge support 2 7 to retract, so that the support plate connecting support 5 is in the minimum outer diameter shrinking state, which makes it easy to extend into the thin-walled square tube.

[0039] Positioning and insertion: Insert the retracted device into the thin-walled square tube through the opening and adjust the position of the device so that the support plate connecting bracket 5 corresponds to the stress area in the middle of the tube, ensuring that the hoisting force is centered. Figure 5 The part shown at point a is a square tube;

[0040] Adaptive expansion locking: Rotate the central shaft 3 in the forward direction, and slide the bracket 4 downward along the central shaft 3, which drives the hinge support 1 6 and hinge support 2 7 to open synchronously, pushing the isolation pad 8 on the outside of the support plate connecting bracket 5 to fit tightly against the inner wall of the square tube. After fitting in place, stop rotating; rely on the self-locking characteristics of the trapezoidal thread to initially lock, and then lock the welding component 1 to achieve double anti-loosening locking;

[0041] Lifting operation: The lifting equipment hook is attached to lifting ring 10 and lifting ring 21 to lift, transport and position the pipe smoothly; the four walls are evenly stressed throughout the lifting process, with no stress concentration and no pipe deformation;

[0042] Disassembly and Recycling: After the pipe is placed in place and stabilized, unlock the welding component 1, rotate the central shaft 3 in the opposite direction to shrink the support structure, and the entire device can be directly pulled out from the inside of the square tube to complete a single hoisting operation.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thin-walled square tube liner-type hoisting device, comprising a central connecting bracket (2), a central shaft (3), and a sliding bracket (4), characterized in that: A central connecting bracket (2) is provided directly below the sliding bracket (4). Support plate connecting brackets (5) are provided on both sides of the bottom of the sliding bracket (4). The central connecting bracket (2) and the support plate connecting brackets (5) on both sides are connected by hinge support one (6). The sliding bracket (4) and the support plate connecting brackets (5) on both sides of the bottom are connected by hinge support two (7). A central shaft (3) is threadedly connected to the middle position inside the sliding bracket (4). The bottom of the central shaft (3) is connected to the central connecting bracket (2). A welding assembly (1) is threadedly connected to the outside of the central shaft (3), and the welding assembly (1) is located at the top of the sliding bracket (4).

2. The thin-walled square tube liner hoisting device according to claim 1, characterized in that: One end of the hinge support (6) is hinged to the support plate connecting bracket (5), and the other end of the hinge support (6) is hinged to the middle connecting bracket (2).

3. The thin-walled square tube liner hoisting device according to claim 1, characterized in that: One end of the hinge support 2 (7) is hinged to the support plate connecting bracket (5), and the other end of the hinge support 2 (7) is hinged to the bottom of the sliding bracket (4).

4. The thin-walled square tube liner hoisting device according to claim 1, characterized in that: The rotation of the central shaft (3) can drive the sliding bracket (4) to move up and down along the axial direction outside it. The bottom of the central shaft (3) is penetrated by the top of the middle connecting bracket (2) and protrudes from the bottom of the middle connecting bracket (2). The rotation of the central shaft (3) can rotate inside the middle connecting bracket (2).

5. The thin-walled square tube liner hoisting device according to claim 1, characterized in that: The top of the central shaft (3) is fixed with a connecting screw sleeve (9), the top of the connecting screw sleeve (9) is fixed with a lifting ring one (10), and the two sides of the top of the sliding bracket (4) are fixed with lifting ring two (11).

6. The thin-walled square tube liner hoisting device according to claim 1, characterized in that: An isolation pad (8) is installed on the outer wall of the support plate connecting bracket (5), and two isolation pads (8) are provided on the outer wall of each support plate connecting bracket (5).

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