A gravity self-locking lifting device for lifting finned tube assemblies

Abstract

This utility model discloses a gravity self-locking lifting device for lifting finned tube assemblies, comprising an L-shaped hook, a hook bolt, and a counterweight. The L-shaped hook includes a lifting rod and a shackle mounting hole. The shackle mounting hole is installed at the top of the lifting rod, and the bottom of the lifting rod is L-shaped. The hook bolt includes a lifting rod, a shackle mounting hole, and a plug. The shackle mounting hole is installed at the top of the lifting rod, and the plug is fixedly connected to the bottom of the lifting rod. The bottom of the lifting rod of the L-shaped hook is inserted into the plug. The counterweight is sleeved on the two lifting rods of the L-shaped hook and the hook bolt. This utility model has a simple and reasonable structure. During the lifting process, due to the weight of the tube assembly and the clamping effect of the counterweight, the L-shaped hook is firmly fixed to the hook bolt, thereby achieving a self-locking effect. The application of this device can prevent the lifting device from disengaging, improve the safety of lifting, and is suitable for lifting finned tube assemblies as well as ordinary serpentine tube assemblies.

Description

Technical Field

[0001] This utility model relates to the technical field of lifting auxiliary devices for finned tube assemblies, and in particular to a gravity self-locking lifting device for lifting finned tube assemblies. Background Technology

[0002] Finned tube assemblies are an important component of boilers, commonly used in dry-quenched coke boilers, and are suspended inside the boiler furnace. To effectively utilize furnace space and improve heat transfer, finned tubes are typically designed in a serpentine pattern. For ease of on-site installation, 10 finned tubes are usually designed as a group, with each group employing a staggered structure to save furnace space. They are assembled in the factory, packaged, and then shipped to the construction site for hoisting. According to the design structure, each finned tube is secured with a clamp to ensure flatness. After each individual fin is completed, the 10 fins are stacked in a staggered pattern. The clamp ends of the 10 fins are welded together using a comb-shaped plate to ensure overall dimensional stability. Each assembled assembly has a length of approximately 7000mm, a width of approximately 1600mm, a height of approximately 500mm, and a weight of approximately 2.5 tons.

[0003] During factory production, pipe assemblies need to be transferred and hoisted, typically using overhead cranes in the workshop. To prevent the finned tubes from bending during hoisting, they are usually suspended from pipe clamps. Due to the staggered arrangement of the tube segments and the narrow spaces between them, hooks made of round steel are typically used for worker installation. However, this poses a risk of the hooks coming loose and the tubes falling during hoisting. Therefore, preventing the lifting equipment from coming loose during hoisting is crucial. Thus, proposing a gravity self-locking device for hoisting finned tube assemblies is of significant importance. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model designs a gravity self-locking lifting device for lifting finned tube assemblies, which is applied to the lifting of finned tube assemblies.

[0005] The present invention adopts the following technical solution:

[0006] A gravity self-locking lifting device for lifting finned tube assemblies includes an L-shaped hook, a hook bolt, and a counterweight.

[0007] The L-shaped hook includes a boom and a shackle mounting hole. The shackle mounting hole is installed at the top of the boom, and the bottom of the boom is L-shaped.

[0008] The hook bolt includes a boom, a shackle mounting hole, and a plug. The shackle mounting hole is installed at the top of the boom, and the plug is fixedly connected to the bottom of the boom. The bottom of the boom of the L-shaped hook is inserted into the plug.

[0009] The counterweight is fitted onto the two booms of the L-shaped hook and the hook bolt.

[0010] Preferably, a limit block is provided at the upper end of the hook bolt located between the two booms.

[0011] Preferably, the socket bolt is welded to the bottom end of the hook bolt's rod.

[0012] Preferably, the L-shaped hook is integrally formed from a steel pipe.

[0013] The beneficial effects of this utility model are: The structure of this utility model is simple and reasonable. During the lifting process, due to the self-weight of the pipe assembly and the clamping effect of the counterweight, the L-shaped hook is firmly fixed to the hook bolt, thus achieving a self-locking effect. The application of this device can prevent the lifting equipment from disengaging, improve lifting safety, and is suitable for lifting finned pipe assemblies as well as ordinary serpentine pipe assemblies. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural diagram of the present invention when installing slings and shackles;

[0016] Figure 3 A schematic diagram illustrating the application of this utility model in the lifting of finned tube assemblies;

[0017] In the diagram: 1. L-shaped hook, 2. Hook bolt, 3. Counterweight block, 4. Shackle mounting hole, 5. Lifting rod, 6. Insert bolt, 7. Limiting block, 8. Finned tube assembly. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0019] Example: Figure 1 As shown, a gravity self-locking lifting device for lifting finned tube assemblies includes an L-shaped hook 1, a hook bolt 2, and a counterweight 3. The L-shaped hook includes a lifting rod 5 and a shackle mounting hole 4. The shackle mounting hole is installed at the top of the lifting rod, and the bottom of the lifting rod is L-shaped. The hook bolt includes a lifting rod, a shackle mounting hole, and a plug 6. The shackle mounting hole is installed at the top of the lifting rod, and the plug is fixedly welded to the bottom of the lifting rod. The bottom of the lifting rod of the L-shaped hook is inserted into the plug. The counterweight is sleeved on the two lifting rods of the L-shaped hook and the hook bolt. A limit block 7 is provided at the upper end of the hook bolt between the two lifting rods.

[0020] like Figure 2 As shown, when installing the sling and shackle in this utility model, the shackle is installed on the shackle mounting hole of the L-shaped hook and hook bolt, and the sling is installed on the shackle.

[0021] like Figure 3 As shown, when using this utility model for lifting finned tube assemblies, the bottom end of the lifting rod of the L-shaped hook passes through the bottom of the finned tube assembly 8, passes through the pipe clamp and is inserted into the insertion hole bolt. Counterweights are attached to the two lifting rods of the L-shaped hook and the hook bolt. The shackle is installed in the shackle mounting hole, and the lifting strap is installed on the shackle for lifting.

[0022] During the lifting process, the L-shaped hook is firmly fixed to the hook bolt due to the weight of the pipe assembly and the clamping effect of the counterweight, thus achieving a self-locking effect. The application of this device can prevent the lifting equipment from disengaging and improve lifting safety.

[0023] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A gravity self-locking lifting device for lifting finned tube assemblies, characterized in that, It includes an L-shaped hook, a hook bolt, and a counterweight; The L-shaped hook includes a boom and a shackle mounting hole. The shackle mounting hole is installed at the top of the boom, and the bottom of the boom is L-shaped. The hook bolt includes a boom, a shackle mounting hole, and a plug. The shackle mounting hole is installed at the top of the boom, and the plug is fixedly connected to the bottom of the boom. The bottom of the boom of the L-shaped hook is inserted into the plug. The counterweight is fitted onto the two booms of the L-shaped hook and the hook bolt.

2. The gravity self-locking lifting device for lifting finned tube assemblies according to claim 1, characterized in that, A limit block is provided at the upper end of the hook bolt, located between the two booms.

3. The gravity self-locking lifting device for lifting finned tube assemblies according to claim 1, characterized in that, The insertion bolt is welded to the bottom end of the hook bolt's rod.

4. A gravity self-locking lifting device for lifting finned tube assemblies according to claim 1, characterized in that, The L-shaped hook is integrally formed from a steel pipe.

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