In-furnace track of aluminum rolling annealing furnace

Abstract

The utility model relates to an in-furnace track of an aluminum rolling annealing furnace, which comprises a frame beam, the frame beams are of an I-shaped steel structure, the multiple sets of frame beams are of a transverse parallel arrangement structure, reinforcing plates are placed at the bottoms of the frame beams, a first track plate and a second track plate are arranged at the tops of the frame beams in a cushioned mode, and the top of the second track plate is in guiding contact with a conveying trolley. A plurality of flat iron plate assemblies are evenly distributed on openings in the front side and the rear side of the frame beam. Through the frame beam structure, the reinforcing plates are added on the two wings and welded to the stand column, the rib plate supporting effect on the stand column is achieved, and the effect of the stand column is enhanced. A plurality of sections are fixed on the furnace bottom beam, expansion joints are reserved, distortion caused by thermal expansion and cold contraction is avoided, the stand columns are welded on the added bottom plate, so that the area acting on the ground beam is increased, the furnace bottom beam is protected, and the installation levelness is high. Repeated maintenance of the in-furnace rail is reduced, labor amount of workers is reduced, service life and utilization rate of the in-furnace rail of the annealing furnace are improved, and labor cost and material cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field, and in particular relates to a furnace track of an aluminum rolling annealing furnace. Background Art

[0002] During the rolling process of aluminum sheets and strips, some aluminum coils need to be annealed and heat treated according to the needs of the process to achieve a certain alloy state and final product performance. To this end, a certain number of aluminum coils need to be placed on the annealing furnace rack, and then the rack is pushed into the annealing furnace through the pusher trolley on the track in the furnace for annealing and heat treatment. Due to the long-term high temperature under the gravity of the aluminum coils and the friction of the guide wheel of the pusher trolley, the track in the annealing furnace can easily cause abnormal conditions such as wavy collapse, deformation, deviation, and even inability to enter and exit the furnace, requiring the furnace to be stopped for cooling and maintenance. After the track is repaired, it is put back into use, and the cycle of use, deformation, and maintenance is repeated. It increases the labor intensity of maintenance staff and reduces the start-up time and work efficiency of the annealing furnace, which urgently needs to be improved.

[0003] The track inside the annealing furnace is designed according to the production requirements of the equipment. The pusher trolley can transport the aluminum coils on the material rack to the support columns in the furnace to complete the annealing heat treatment operation. However, due to the force problem of the support points of the aluminum coils and the large wheels of the pusher trolley, the track inside the furnace collapses in a wavy shape, deforms, runs off track and other abnormal conditions. In severe cases, the support columns of the material rack, the inner wall of the furnace and the furnace door frame are damaged. The motor of the pusher trolley trips, the reducer is damaged, the gear shaft is broken, the trolley derails and cannot enter or exit the furnace normally, and the furnace needs to be stopped for cooling and maintenance.

[0004] Cause analysis: After inspection inside the furnace, it was found that the two tracks inside the furnace for the trolley to enter and exit collapsed in a wave shape and tilted horizontally to one side. After removing the tracks, it was found that the second beam channel steel had plastic deformation, and the square column part tilted inward. The collapsed part was located between the two columns. The deformation was serious within a distance of 5 meters from the furnace door to the furnace, and the inner beams of the furnace were not deformed. According to the on-site inspection and analysis, the main reason for the deviation of the push car was that the second beam structure could not meet the use requirements in a long-term high temperature environment, resulting in a wave-like collapse; thermal expansion and contraction caused twisting and deformation, causing the horizontal tilt to one side.

[0005] In order to solve the problem that the rails in the annealing furnace are subjected to the gravity of the aluminum coils and the friction of the guide wheels of the pusher trolley under high temperature for a long time, resulting in abnormal conditions such as wave-shaped collapse, deformation, deviation, etc., in severe cases, damage is caused to the supporting columns of the material rack in the furnace, the inner wall of the furnace, and the furnace door frame, the motor of the pusher trolley trips, the reducer is damaged, the gear shaft is broken, the trolley derails and cannot enter or exit the furnace normally, and the furnace needs to be stopped for cooling and maintenance. The labor intensity of employees is increased, the startup time and work efficiency of the annealing furnace are reduced, and other problems. The utility model reduces the repetitive maintenance of the rails in the furnace through technical improvements, reduces the workload of employees, improves the service life and utilization rate of the rails in the annealing furnace, and reduces labor costs and material costs. Summary of the invention

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A furnace track of an aluminum rolling annealing furnace includes a frame beam; the frame beam is an I-beam structure, and multiple groups of frame beams are in a transverse parallel arrangement structure. A reinforcing plate is placed at the bottom of the frame beam, and a first track plate and a second track plate are padded on the top of the frame beam. A transport trolley is in guide contact with the top of the second track plate, and a plurality of groups of flat iron plate assemblies are evenly distributed on the front and rear sides of the frame beam.

[0008] Furthermore, the flat iron plate assembly includes longitudinal flat iron plates and transverse flat iron plates. Multiple groups of longitudinal flat iron plates are evenly welded to the front and rear openings of the frame beam, and transverse flat iron plates are welded between two adjacent longitudinal flat iron plates.

[0009] Furthermore, a limit clamp is vertically welded at the center of the top of the longitudinal flat iron plate, and the top of the limit clamp is a horizontal bending structure, which is welded to the top plane of the second track plate;

[0010] A connecting strip is welded between two adjacent limiting clamps, and the connecting strip is in guide contact with the traveling wheel of the transport trolley.

[0011] Furthermore, the ends of the first track plate and the second track plate extending along the left and right sides of the frame beam are both steeply sloped, and the angle between the plane of the steep slope and the vertical line is 75 degrees;

[0012] The bottom end surface of the first track plate is padded with a special-shaped pad, and the inner end surface of the special-shaped pad is fixedly connected to the frame beam.

[0013] Furthermore, the reinforcing plate is provided with a through hole in the longitudinal direction, and a vertical welding column is inserted into the through hole.

[0014] Furthermore, expansion gaps are left between two adjacent frame beams.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the prior art, the utility model designs the two-beam structure of the annealing furnace bottom from the aspects of actual use, approved load weight, furnace temperature, and convenient maintenance. It adopts a segmented frame beam structure, with reinforcement plates added to the two wings. The bottom plate adopts a 20mm steel plate, which is connected to the column as a whole. A flat iron plate assembly is added between the two columns, which is connected to the reinforcement plates added to the two wings and fixed on the furnace bottom beam in several sections to reserve expansion joints. The material of the rails in the annealing furnace is changed, and 304 stainless steel is selected.

[0017] 1. The frame beam structure has reinforcement plates on both wings and bottom steel plates, which are welded together with the columns to increase the bearing capacity and prevent wave-shaped collapse;

[0018] 2. The two wings are added with reinforcing plates welded to the columns, which also play the role of stiffeners supporting the columns, thus enhancing the function of the columns;

[0019] 3. Add a flat iron plate assembly between the two columns and connect it to the two wings with reinforcement plates to prevent tilting to one side;

[0020] 4. Fixed on the furnace bottom beam in several sections to reserve expansion joints to avoid distortion and deformation caused by thermal expansion and contraction. Prefabrication can be achieved first, and partial replacement is convenient for maintenance and rapid resumption of production;

[0021] 5. The columns are welded on the added bottom plate to increase the area acting on the ground beam, which protects the furnace bottom beam and has a high installation level.

[0022] 6. All the steel used to make the rails in the furnace will be replaced with 304 stainless steel or 16Mn manganese steel to increase the strength and toughness of the material, and fundamentally solve the problems of deformation and deviation of the rails in the annealing furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a schematic diagram of the structure of the furnace track of an aluminum rolling annealing furnace.

[0024] Figure 2 The utility model is a front view of a track frame beam in an aluminum rolling annealing furnace.

[0025] Figure 3 The utility model is a schematic diagram of the partial structure of the track in the furnace of an aluminum rolling annealing furnace.

[0026] List of Figure Symbols:

[0027] 1 is a frame beam, 2 is a longitudinal flat iron plate, 4 is a connecting strip, 5 is a transverse flat iron plate, 6 is a limit clamp, 7 is a first track plate, 8 is a special-shaped pad, 9 is a second track plate, 10 is a reinforcing plate, and 11 is a vertical welding column. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, a furnace track of an aluminum rolling annealing furnace includes a frame beam; the frame beam 1 is an I-beam structure, and multiple groups of frame beams 1 are in a transverse parallel arrangement structure. A reinforcing plate 10 is placed at the bottom of the frame beam 1, and the top of the frame beam 1 is padded with a first track plate 7 and a second track plate 9. The top of the second track plate 9 is in guide contact with a transport trolley, and the front and rear sides of the frame beam 1 are open and evenly distributed with a number of groups of flat iron plate assemblies. Among them, the frame beam 1 serves as the main structure of the track, and a number of groups of frame beams 1 are horizontally spliced ​​to form a track prototype, and then the reinforcing plate 10 is used to fix the frame beam 1 and improve its own horizontal stability; at the same time, the first track plate 7 and the second track plate 9 of the double-plate structure are used as the direct extrusion contact end faces of the transport trolley, which can effectively protect the upper surface structure of the frame beam 1 and improve the service life of the frame beam 1.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the flat iron plate assembly includes a longitudinal flat iron plate 2 and a transverse flat iron plate 5. Multiple groups of longitudinal flat iron plates 2 are evenly welded at the front and rear openings of the frame beam 1, and transverse flat iron plates 5 are welded between two adjacent longitudinal flat iron plates 2. The longitudinal and transverse side fixing supplementary structures of the longitudinal flat iron plates 2 and the transverse flat iron plates 5 can further strengthen the connection stability of the side of the frame beam 1.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, a limit clamp 6 is vertically welded at the top center of the longitudinal flat iron plate 2, and the top of the limit clamp 6 is a horizontal bending structure, which is welded to the top plane of the second track plate 9; a connecting strip 4 is welded between two adjacent limit clamps 6, and the connecting strip 4 is in guiding contact with the running wheel of the transport trolley. Among them, the limit clamp 6 further limits the connection structure of the flat iron plate assembly and multiple groups of frame beams 1. The limit clamp 6 cooperates with the connecting strip 4 to complete the guided connection process, and the limit clamp 6 provides a connection plane for the horizontal and vertical end faces, which improves the overall stability of the track.

[0032] like Figure 1 , Figure 2 and Figure 3As shown, the ends of the first track plate 7 and the second track plate 9 extending left and right along the frame beam 1 are both steeply sloped, and the angle between the plane of the steep slope and the vertical is seventy-five degrees; wherein, the ends of the first track plate 7 and the second track plate 9 extending left and right along the frame beam 1 are both steeply sloped, which can further limit the horizontal displacement of the first track plate 7 and the second track plate 9. Due to the mass of the transport trolley itself and the mass of the cargo carried, there will be huge inertia during the emergency stop, so the friction force exerted by the trolley wheel body on the first track plate 7 and the second track plate 9 will also be very large. The first track plate 7 and the second track plate 9 affected by the friction force will be displaced in the direction of the force, while the first track plate 7 and the second track plate 9 that have been pre-limited will not be affected by the displacement.

[0033] The bottom end surface of the first track plate 7 is padded with a special-shaped pad 8, and the inner end surface of the special-shaped pad 8 is fixedly connected to the frame beam 1. The function of the special-shaped pad 8 is to further limit the displacement of the first track plate 7 and the second track plate 9.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, the reinforcing plate 10 is longitudinally provided with a through hole, in which a vertical welding column 11 is inserted. An expansion gap is left between two adjacent frame beams 1. The retention of the expansion gap can prevent the volume change between the frame beams 1 due to the temperature difference, thereby not affecting the bulge of the top transport plane of the frame beam 1.

[0035] It should be noted that the above content only illustrates the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims

1. A furnace track of an aluminum rolling annealing furnace, comprising a frame beam; wherein: The frame beam (1) is an I-beam structure, and a plurality of groups of frame beams (1) are arranged in a transverse parallel structure. A reinforcing plate (10) is placed at the bottom of the frame beam (1), and a first track plate (7) and a second track plate (9) are installed on the top of the frame beam (1). The top of the second track plate (9) is in guide contact with a transport trolley, and a plurality of groups of flat iron plate assemblies are evenly distributed on the front and rear sides of the frame beam (1).

2. The furnace track of an aluminum rolling annealing furnace according to claim 1, characterized in that: The flat iron plate assembly comprises longitudinal flat iron plates (2) and transverse flat iron plates (5), a plurality of groups of longitudinal flat iron plates (2) are uniformly welded to the front and rear openings of the frame beam (1), and transverse flat iron plates (5) are welded between two adjacent longitudinal flat iron plates (2).

3. The furnace track of an aluminum rolling annealing furnace according to claim 2, characterized in that: A limit clamp (6) is vertically welded to the center of the top of the longitudinal flat iron plate (2); the top of the limit clamp (6) is a horizontally bent structure, and the horizontally bent structure is welded to the top plane of the second track plate (9); A connecting strip (4) is welded between two adjacent limit clamps (6), and the connecting strip (4) is in guide contact with the travel wheel of the transport trolley.

4. The furnace track of an aluminum rolling annealing furnace according to claim 1, characterized in that: The ends of the first track plate (7) and the second track plate (9) extending along the left and right sides of the frame beam (1) are both steeply sloped, and the angle between the plane of the steep slope and the vertical is seventy-five degrees; The bottom end surface of the first track plate (7) is padded with a special-shaped pad (8), and the inner end surface of the special-shaped pad (8) is fixedly connected to the frame beam (1).

5. The furnace track of an aluminum rolling annealing furnace according to claim 1, characterized in that: The reinforcing plate (10) is provided with a through hole in the longitudinal direction, and a vertical welding column (11) is inserted into the through hole.

6. The furnace track of an aluminum rolling annealing furnace according to claim 1, characterized in that: Two adjacent frame beams (1) have expansion gaps.

Images