Cross-shaped hoisting tool for heat treatment of short and thick cylindrical workpiece

Abstract

The utility model relates to a lifting appliance, in particular to a cross-shaped lifting tool for heat treatment of short and thick cylindrical workpieces, which comprises a lifting support and lifting chains, the lifting support consists of two cross beams, each end of the cross beams is connected with the lifting chains with the same length, and lifting hooks are arranged at the lower ends of the lifting chains. The lifting device is simple in structure, good in bearing capacity, safe, convenient and stable in lifting, capable of effectively improving the heat treatment efficiency and reducing the labor intensity of workers, safe and reliable.

Description

Technical Field

[0001] This utility model relates to a lifting tool, specifically a cross-shaped lifting tool for heat treatment of short, thick cylindrical workpieces. Background Technology

[0002] Heat treatment is a fundamental technology in the machinery industry. It plays a vital role in fully realizing the performance potential of metallic materials, improving the intrinsic quality of products, and extending their service life. Currently, the cross-sections and tonnage of workpieces being produced are increasing, necessitating careful consideration not only of the heat treatment process design but also of the heat treatment tooling design.

[0003] For lifting fixtures used in heat treatment, since lifting is involved throughout the entire heat treatment process, the lifting of short, thick cylindrical workpieces requires both effective and stable lifting, while avoiding excessive restraint to prevent affecting the workpiece's dimensions or properties before and after heat treatment. Therefore, a safe, convenient, and stable heat treatment condition is needed for workpieces during furnace loading and unloading, especially during quenching and cooling, including lifting, slinging, placement, and cooling. This would improve heat treatment efficiency, reduce worker labor intensity, minimize prolonged manual preparation work before high-temperature online lifting, and reduce safety risks. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide a cross-shaped lifting fixture for heat treatment of short and thick cylindrical workpieces that is simple in structure, has good load-bearing capacity, is safe, convenient and stable for lifting, effectively improves heat treatment efficiency, reduces the labor intensity of workers, and is safe and reliable.

[0005] The technical solution includes a hoisting support and a hoisting chain. The hoisting support consists of two crossbeams, each end of which is connected to a hoisting chain of equal length. The lower end of the hoisting chain is equipped with a hook.

[0006] The hoisting support has a lifting lug at its center.

[0007] The upper end of the lifting chain is equipped with a lifting ring.

[0008] The crossbeam is provided with multiple slots evenly distributed along the axial direction for attaching lifting rings.

[0009] The hook is an L-shaped hook.

[0010] Beneficial effects:

[0011] This invention employs a lifting chain and support structure, utilizing two crossbeams to form the lifting support, ensuring lifting strength. Each end of the crossbeams is connected to a lifting chain of equal length, with a hook at the lower end of each chain. The lifting chain facilitates a smoother and more convenient lifting and transfer process, minimizing contact with short, thick cylindrical workpieces and ensuring optimal heat treatment results. Multiple slots for attaching lifting rings are evenly distributed along the axial direction on the crossbeams. These slots engage with the lifting rings located at the upper end of the lifting chain. By attaching these rings at different positions, the invention can accommodate the lifting of short, thick cylindrical workpieces of various sizes, offering flexibility, convenience, and good adaptability. This invention features a simple structure, high load-bearing capacity, safe, convenient, and stable lifting, effectively improving heat treatment efficiency, reducing worker labor intensity, and ensuring safety and reliability. It is suitable for lifting various short, thick cylindrical workpieces. Attached Figure Description

[0012] Figure 1 This is a diagram showing the hoisting state of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of this utility model.

[0014] Among them, there are: crossbeam 1, crossbeam 2, lifting chain 3, lifting lug 4, lifting ring 5, slot 6, hook 7, and workpiece 8. Detailed Implementation

[0015] The present invention will be further explained below with reference to the accompanying drawings:

[0016] See Figure 2 This utility model includes a hoisting support and a hoisting chain 3. The hoisting support consists of two crossbeams 1 and 2. The hoisting support has a lifting lug 4 at its center. Each end of the crossbeam 2 is connected to a hoisting chain 3 of equal length, for a total of four chains. The upper end of the hoisting chain 3 is provided with a lifting ring 5, and the lower end is provided with a hook 7, preferably an L-shaped hook. The crossbeams 1 and 2 are provided with multiple slots 6 evenly distributed along the axial direction for hanging the lifting rings 7.

[0017] As an example, in this embodiment, the two crossbeams 1 and 2 are 3.5-4.5m long, and the lifting chain 3 is 4-4.5mm long. The size range of the workpiece 8 that can be lifted is: the diameter of large cross-section workpieces < 3.5m.

[0018] Lifting before heat treatment: Place the workpiece 8 directly under the lifting support. First, hook the lifting rings 5 ​​of the four lifting chains 6 into the corresponding slots 6 of the crossbeam. Insert the hooks 7 into the bottom surface of the workpiece 8 (short, thick, cylindrical workpiece). Hook the lifting lugs 4 through the crane hooks. Use the hooks 7 on the four lifting chains 6 to lift the workpiece 8. Start the crane and lift the workpiece into the trolley furnace for loading. Keep the crane stationary, keeping the workpiece parallel to the furnace surface. After leveling and stabilizing it, remove the hooks 7. Start the crane to remove the tooling of this utility model. Drive the trolley furnace into the furnace chamber and close the furnace door to perform heat treatment on the workpiece 8.

[0019] After the heat treatment heating is completed, open the furnace door, open the furnace platform, repeat the above-mentioned work before hoisting, and hoist the workpiece 8 into the cooling tank for cooling.

Claims

1. A cross-shaped lifting fixture for heat treatment of short, thick cylindrical workpieces, comprising lifting supports and lifting chains, characterized in that, The hoisting support consists of two crossbeams, each end of which is connected to a hoisting chain of equal length, and the lower end of the hoisting chain is provided with a hook.

2. The cross-shaped lifting fixture for heat treatment of short, thick cylindrical workpieces as described in claim 1, characterized in that, The hoisting support has a lifting lug at its center.

3. The cruciform lifting fixture for heat treatment of rough cylindrical workpieces as described in claim 1 or 2, characterized in that, The upper end of the lifting chain is equipped with a lifting ring.

4. The cruciform lifting fixture for heat treatment of coarse cylindrical workpieces as described in claim 3, characterized in that, The crossbeam is provided with multiple slots evenly distributed along the axial direction for attaching lifting rings.

5. The cruciform lifting fixture for heat treatment of coarse cylindrical workpieces as described in claim 3, characterized in that, The hook is an L-shaped hook.

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