Liquid crown block portal hook heat insulation device
By installing a heat insulation device with a sandwich structure and zirconia ceramic bolts on the gantry hook of the liquid crane, the problem of beam deformation caused by flame scorching was solved, the service life was extended, production continuity was ensured, and maintenance costs were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG IRON & STEEL GRP YONGFENG LINGANG CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-05-29
AI Technical Summary
The crossbeam of the gantry hook of the liquid crane deforms and bends due to the heat of the flame when lifting high-temperature molten metal, resulting in a short service life and safety hazards. In addition, the main hook cannot lift and lower normally when it malfunctions, affecting production.
A heat insulation device for a liquid crane gantry hook was designed, which uses a sandwich structure of first and second heat insulation plates connected by zirconia ceramic bolts. The heat insulation plates form a gap with the crossbeam for heat insulation and provide a temporary lifting point in case of main hook failure.
It extends the service life of the crossbeam, reduces maintenance costs, and ensures uninterrupted production in the event of a main hook failure by using a secondary hook for temporary lifting, thus avoiding excessive temperature drop.
Smart Images
Figure CN224298700U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of metallurgical equipment technology, and in particular relates to a heat insulation device for a liquid overhead crane gantry hook. Background Technology
[0002] Steel plants use liquid trolleys to lift ladles and tundishes containing molten steel, iron, and other high-temperature molten metals. During lifting, the molten metal inside the ladle generates flames that scorch the crossbeams of the liquid trolley. After prolonged use, the crossbeams of the gantry hooks of the liquid trolleys will deform and bend, thus typically reducing their service life to only one year. Moreover, deformed and bent gantry hooks can lead to problems such as weld breakage and hook misalignment, causing serious safety accidents. In addition, the main hook of the gantry hook sometimes malfunctions, preventing normal lifting and lowering. Troubleshooting requires assistance from other lifting equipment, which is time-consuming. If molten iron or steel is being lifted, this can cause excessive temperature drop, affecting production. Summary of the Invention
[0003] The purpose of this invention is to provide a liquid overhead crane gantry hook heat insulation device to solve the problems existing in the prior art.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A liquid overhead crane gantry hook heat insulation device includes a crossbeam and a support plate. The support plate is placed on the crossbeam. Several first ear plates are welded on the crossbeam, and several second ear plates are welded on the support plate. The crossbeam and the support plate are bolted together by a first bolt pair that passes through the first ear plates and the second ear plates. A lifting lug is welded in the middle of the support plate. First heat insulation plates are bolted to the bottom of both ends of the support plate. A second heat insulation plate is bolted between the bottom ends of two first heat insulation plates. The second heat insulation plate is located below the crossbeam.
[0006] Furthermore, there are four second ear plates, which are coaxial and symmetrical in pairs. There are also four first ear plates, which are positioned corresponding to the four second ear plates. After passing through the support plate, the four first ear plates are located inside the corresponding four second ear plates and are coaxial. There are two first bolt pairs, which pass through the coaxial first and second ear plates respectively.
[0007] Furthermore, both the first and second heat insulation boards are sandwich structures. The sandwich structure of the first and second heat insulation boards consists of heat insulation material, two heat insulation steel plates, and several second bolt pairs. The two heat insulation steel plates sandwich the heat insulation material and are then bolted together by the second bolt pairs that penetrate the heat insulation steel plates and the heat insulation material.
[0008] Furthermore, the upper ends of the two heat-insulating steel plates of the first heat insulation plate have reverse bends, and the reverse bends at the top of the first heat insulation plate are close to the bottom of the support plate and are bolted to the support plate by a second bolt pair that passes through the support plate and the heat insulation plate.
[0009] Furthermore, the bottom ends of the two heat-insulating steel plates of the first heat-insulating plate have bends in the same direction. The bends in the same direction at the bottom ends of the two first heat-insulating plates respectively clamp the two ends of the second heat-insulating plate, and the second heat-insulating plate is bolted to the first heat-insulating plate and the second heat-insulating plate by the second bolt pair.
[0010] Furthermore, the second bolt pair is a zirconia ceramic bolt.
[0011] Furthermore, several stiffening plates are welded to the side of the first insulation board near the crossbeam.
[0012] This utility model has the following beneficial effects:
[0013] 1. This utility model replaces the crossbeam with a first heat insulation plate and a second heat insulation plate to receive the flame heat, thereby playing a heat insulation role, extending the service life of the crossbeam and reducing the maintenance cost of the liquid crane.
[0014] 2. This utility model is easy to assemble and disassemble, and the deformed first heat insulation plate and second heat insulation plate can be replaced at any time.
[0015] 3. This utility model provides temporary lifting points through the lifting lugs. When the main hook fails, the auxiliary hook is attached to the lifting lug to replace the main hook for lifting, thus not delaying production. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a utility model Figure 1 Enlarged structural diagram at point A in the middle.
[0018] Figure 3 This is a utility model Figure 1 Enlarged structural diagram at point B.
[0019] Figure 4 This is a schematic diagram of the support plate structure of this utility model.
[0020] Figure 5 This is a schematic diagram of the first heat insulation plate structure of this utility model.
[0021] Figure 6 This is a schematic diagram of the structure of the second heat insulation plate of this utility model.
[0022] Among them: 1. crossbeam; 2. support plate; 3. first ear plate; 4. second ear plate; 5. first bolt pair; 6. lifting lug; 7. first heat insulation plate; 8. second heat insulation plate; 9. heat insulation material; 10. heat insulation steel plate; 11. second bolt pair; 12. stiffening plate. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.
[0024] like Figures 1-6 As shown, a liquid overhead crane gantry hook heat insulation device includes a crossbeam 1 and a support plate 2. The support plate 2 is placed on the crossbeam 1. Several first ear plates 3 are welded on the crossbeam 1, and several second ear plates 4 are welded on the support plate 2. The crossbeam 1 and the support plate 2 are bolted together by a first bolt pair 5 that passes through the first ear plates 3 and the second ear plates 4. A lifting lug 6 is welded to the middle position of the support plate 2. First heat insulation plates 7 are bolted to the bottom of both ends of the support plate 2. A second heat insulation plate 8 is bolted between the bottom ends of two first heat insulation plates 7. The second heat insulation plate 8 is located below the crossbeam 1.
[0025] There are four second ear plates 4, which are coaxial and symmetrical in pairs. There are also four first ear plates 3, which are positioned corresponding to the four second ear plates 4. The four first ear plates 3 pass through the support plate 2 and are located inside the corresponding four second ear plates 4, coaxially. There are two first bolt pairs 5, which pass through the coaxial first ear plates 3 and second ear plates 4 respectively. To further ensure the fastening effect, a double-nut fastening method can be used, that is, the first bolt pairs 5 are fastened with double nuts.
[0026] Both the first heat insulation plate 7 and the second heat insulation plate 8 are sandwich structures. Each sandwich structure consists of heat insulation material 9, two heat insulation steel plates 10, and several second bolt pairs 11. The two heat insulation steel plates 10 clamp the heat insulation material 9 and are then bolted together by the second bolt pairs 11 that penetrate the heat insulation steel plates 10 and the heat insulation material 9. The heat insulation steel plates 10 provide support, and the heat insulation material 9 can be made of aluminum silicate or other materials capable of withstanding high temperatures.
[0027] The two heat-insulating steel plates 10 of the first heat-insulating plate 7 have reverse bends at their upper ends. The reverse bends at the top of the first heat-insulating plate 7 are close to the bottom of the support plate 2 and are bolted to the support plate 2 by the second bolt pair 11 that passes through the support plate 2 and the heat-insulating plate.
[0028] The two heat-insulating steel plates 10 of the first heat-insulating plate 7 have bends in the same direction at their bottom ends. The bends in the same direction at the bottom ends of the two first heat-insulating plates 7 respectively clamp the two ends of the second heat-insulating plate 8, and the second heat-insulating plate 8 is bolted to the heat-insulating steel plates 10 that pass through the first heat-insulating plate 7 and the second bolt pair 11 of the second heat-insulating plate 8.
[0029] The second bolt set 11 is a zirconia ceramic bolt. Zirconia ceramic bolts have high strength and excellent high-temperature resistance. They remain stable even when exposed to flame, and unlike ordinary steel bolts, they will not burn through when exposed to flame.
[0030] Several stiffening plates 12 are welded to one side of the first heat insulation plate 7 near the crossbeam 1. One end of the stiffening plate 12 is attached to the crossbeam 1, which serves as a support and also strengthens the heat insulation steel plate 10. The heat insulation steel plate 10 of the first heat insulation plate 7 is not close to the crossbeam 1. There are gaps between the first heat insulation plate 7, the second heat insulation plate 8 and the crossbeam 1, which serve as air insulation.
[0031] The working principle of this utility model is as follows:
[0032] During installation, the support plate 2 is passed through the first ear plate 3, the first bolt pair 5 is passed through the first ear plate 3 and the second ear plate 4, the second heat insulation plate 8 is inserted into the bend at the bottom of the first heat insulation plate 7 and bolted on, and the first heat insulation plate 7 is bolted to the bottom of both ends of the support plate 2, thus completing the installation. During operation, the second heat insulation plate 8 withstands the intense heat from the flames erupting from the ladle, thus protecting the bottom of the crossbeam 1. The first heat insulation plate 7 withstands the intense heat from the flames on both sides of the crossbeam 1, thus protecting both sides of the crossbeam 1. There are gaps between the first heat insulation plate 7, the second heat insulation plate 8 and the crossbeam 1, which serve as air insulation. If the first heat insulation plate 7 or the second heat insulation plate 8 deforms or bends due to intense heat, they should be replaced promptly. When the main hook of the gantry hook malfunctions and cannot be raised or lowered normally, the auxiliary hook of the liquid crane is attached to the lifting lug 6. After removing the main hook, the auxiliary hook is used for raising and lowering, thus preventing excessive temperature drop in molten steel or iron due to maintenance.
[0033] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention.
[0034] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.
Claims
1. A liquid overhead crane gantry hook heat insulation device, characterized in that, The device includes a crossbeam and a support plate. The support plate is placed on the crossbeam. Several first ear plates are welded to the crossbeam, and several second ear plates are welded to the support plate. The crossbeam and the support plate are bolted together by first bolt pairs that pass through the first ear plates and the second ear plates. A lifting lug is welded to the middle of the support plate. First heat insulation plates are bolted to the bottom of both ends of the support plate. A second heat insulation plate is bolted between the bottom ends of two first heat insulation plates. The second heat insulation plate is located below the crossbeam.
2. The liquid overhead crane gantry hook heat insulation device according to claim 1, characterized in that, There are four second ear plates, which are coaxial and symmetrical in pairs. There are four first ear plates, which are positioned corresponding to the four second ear plates. The four first ear plates pass through the support plate and are located inside the corresponding four second ear plates and are coaxial. There are two first bolt pairs, which pass through the coaxial first ear plates and second ear plates respectively.
3. The liquid overhead crane gantry hook heat insulation device according to claim 1, characterized in that, Both the first heat insulation board and the second heat insulation board are sandwich structures. The sandwich structure of the first heat insulation board and the second heat insulation board consists of heat insulation material, two heat insulation steel plates, and several second bolt pairs. The two heat insulation steel plates sandwich the heat insulation material and are bolted together by the second bolt pairs that penetrate the heat insulation steel plates and the heat insulation material.
4. The liquid overhead crane gantry hook heat insulation device according to claim 3, characterized in that, The upper ends of the two heat-insulating steel plates of the first heat insulation plate have reverse bends. The reverse bend at the top of the first heat insulation plate is close to the bottom of the support plate and is bolted to the support plate by a second bolt pair that passes through the support plate and the heat insulation plate.
5. The liquid overhead crane gantry hook heat insulation device according to claim 4, characterized in that, The bottom ends of the two heat-insulating steel plates of the first heat insulation plate have bends in the same direction. The bends in the same direction at the bottom ends of the two first heat insulation plates respectively clamp the two ends of the second heat insulation plate, and the second heat insulation plate is bolted to the first heat insulation plate and the second heat insulation plate by the second bolt pair through the heat-insulating steel plate penetrating the first heat insulation plate.
6. The liquid crane gantry hook heat insulation device according to claim 5, characterized in that, The second bolt pair is a zirconia ceramic bolt.
7. The liquid overhead crane gantry hook heat insulation device according to claim 5, characterized in that, Several stiffening plates are welded to the side of the first heat insulation plate near the crossbeam.