Vertical material rack and bell-type furnace having the same

Abstract

The present invention discloses a vertical material rack for placing aluminum coils for heat treatment, the vertical material rack comprises at least one horizontally arranged support plate, each of the support plates is arranged in a vertical direction, a support rack is arranged between adjacent support plates, the support plate is provided with a receiving hole for accommodating the sleeve end of the aluminum coil, and the upper side of the support plate is provided with a plurality of flow slots. The vertical material rack solves the problem of vertical placement and support of aluminum coils for annealing in a bell-type furnace, and realizes annealing of aluminum coils in a bell-type furnace; the gas flow channel between the end face of the aluminum coil and the support plate makes the end face of the aluminum coil heated more evenly, which is conducive to the axial and radial transfer of heat; the bell-type furnace is only equipped with one circulation fan on the furnace table, unlike the box-type furnace which requires one circulation fan for each partition, so the power consumption per unit aluminum coil is lower than that of annealing in a box-type furnace; the more compact and sealed furnace space realizes less consumption of protective atmosphere.

Description

Technical Field

[0001] The invention relates to a vertical material rack and a bell-type furnace having the same. Background Art

[0002] Annealing of cold rolled aluminum coils is usually carried out in a box furnace. The coils are placed horizontally on the racks in the furnace, and the atmosphere in the furnace is forced to flow with the help of a high-temperature circulating fan, and the aluminum coils are annealed by convection heat transfer. The structural characteristics of the box furnace are that an aluminum coil is placed in each zone, and each zone is equipped with a separate circulating fan, which consumes a lot of energy.

[0003] The bell-type furnace is widely used in the annealing of cold-rolled strip steel due to its good sealing performance and relatively short annealing cycle. In the bell-type furnace, the steel coils are stacked vertically for annealing, that is, the axis of the steel coils is placed along the vertical direction. At present, there are also applications for annealing aluminum foil coils in bell-type furnaces. Since the volume of aluminum foil coils is small, they are usually stacked horizontally, that is, the axis of the aluminum foil coils is placed along the horizontal direction. However, there is no application for annealing large aluminum coils in bell-type furnaces. Compared with aluminum foil coils, the volume of aluminum coils is larger. If they are placed horizontally, it will affect the circulation of gas in the bell-type furnace, which is not conducive to convection heat exchange, resulting in uneven heating of the coils and a long annealing cycle. Stacking cold-rolled aluminum coils vertically in a bell-type furnace for annealing can give full play to the advantages of the bell-type furnace. However, if they are directly stacked vertically, the aluminum coils located below will be deformed due to the low hardness of the aluminum coils. Therefore, how to place aluminum coils in the bell-type furnace is a technical problem to be solved. Summary of the invention

[0004] The object of the present invention is to provide a vertical material rack which can be arranged in a hood of a bell-type furnace, and on which an aluminum coil can be vertically arranged for heat treatment.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a vertical material rack for placing aluminum coils for heat treatment, the aluminum coils including a sleeve and an aluminum strip wound on the sleeve, the vertical material rack including at least one horizontally arranged support plate, each of the support plates being arranged in a vertical direction, a support frame being arranged between adjacent support plates, the support plate being provided with a receiving hole for accommodating the end of the sleeve, and a plurality of flow grooves being provided on the upper side of the support plate.

[0006] Preferably, the flow grooves extend radially outward from the accommodating hole, and all the flow grooves are radially distributed around the accommodating hole.

[0007] Preferably, a plurality of support plates are provided on the upper side of the support disk, and the interval spaces between the support plates constitute the flow slots.

[0008] Preferably, the support frame includes a plurality of support columns extending in a vertical direction, and the support columns are arranged on the outer periphery of the support plate.

[0009] Further preferably, the support column is detachably connected to the support plate.

[0010] Preferably, the support plate comprises a top plate and a bottom plate both of which are arranged horizontally, and a plurality of vertically arranged support ribs are arranged between the top plate and the bottom plate.

[0011] Further preferably, the supporting ribs are distributed radially around the accommodating hole.

[0012] Preferably, the accommodating hole is a through hole.

[0013] Preferably, the distance between adjacent support plates is greater than the axial length of the aluminum coil.

[0014] Another object of the present invention is to provide a bell-type furnace, which can realize annealing of aluminum coils in vertical stacks placed in the bell-type furnace.

[0015] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a bell-type furnace, in which the vertical material rack as described above is arranged.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: (1) It solves the problem of vertical placement and support of aluminum coils during annealing in a bell-type furnace, thereby realizing annealing of aluminum coils in a bell-type furnace; (2) The gas flow channel between the end face of the aluminum coil and the support plate makes the end face of the aluminum coil heated more evenly, which is beneficial to the axial transfer of heat. There is gas flow convection heat exchange on the outer surface of the aluminum coil and inside the sleeve, which enhances the radial transfer of heat in the aluminum coil; (3) The bell-type furnace is only equipped with one circulation fan on the furnace table, unlike the box-type furnace which requires one circulation fan for each partition, so the power consumption per unit aluminum coil is lower than that of annealing in a box-type furnace; (4) The more compact and sealed furnace space achieves less consumption of protective atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 is an axonometric diagram of the support plate;

[0018] Attached Figure 2 is a top view schematic diagram of the support plate;

[0019] Attached Figure 3 It is a cross-sectional schematic diagram of a vertical material rack with aluminum coils installed;

[0020] Among them: 1. support plate; 11. receiving hole; 12. circulation slot; 13. top plate; 14. bottom plate; 15. support rib plate; 2. aluminum coil; 21. sleeve; 22. aluminum strip; 3. support plate; 4. support frame; 41. support column. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0022] Figures 1 to 3 The vertical material rack is shown, which can be arranged in the furnace hood of the bell-type furnace. The vertical material rack includes at least one horizontally arranged support plate 1, each support plate 1 is arranged in the vertical direction, and a support frame 4 is arranged between adjacent support plates 1. The support plate 1 is provided with a receiving hole 11 for accommodating the sleeve end of the aluminum coil 2, and the upper side of the support plate 1 is provided with a plurality of flow slots 12. The aluminum coil 2 includes a sleeve 21 and an aluminum strip 22 wound on the sleeve 21, and the sleeve 21 protrudes at both axial ends of the aluminum coil 2. The distance between two adjacent support plates 1 is greater than the axial length of the aluminum strip 22.

[0023] An aluminum coil 2 can be placed vertically on each support plate 1, so the vertical material rack can stack multiple aluminum coils 2, which can make more full use of the space in the bell-type furnace and save the consumption of protective atmosphere. In this embodiment, the aluminum coils 2 are stacked into two layers. In other embodiments, the number of aluminum coils 2 can be increased or decreased according to the actual size of the bell-type furnace. Each aluminum coil 2 only bears its own weight, and the weight of the aluminum coil 2 located above will not be transferred to the aluminum coil 2 below, so the aluminum coil 2 will not be deformed. The end of the sleeve 21 can be inserted into the accommodating hole 11, so that the stacking of the aluminum coils 2 in the vertical direction is more compact, so that the bell-type furnace can accommodate more aluminum coils 2, and at the same time ensure that the axial end of the aluminum strip 22 stands on the support plate 1, so that the aluminum coil 2 can be firmly placed on the vertical material rack, and the accommodating hole 11 can also limit the sleeve 21.

[0024] In the prior art, when a box-type furnace is used to anneal aluminum coils, each aluminum coil needs to be equipped with a circulation fan. However, when a bell-type furnace with the vertical material rack is used to anneal aluminum coils, multiple aluminum coils only need to be equipped with one circulation fan, which has lower energy consumption.

[0025] Since the upper side of the support plate 1 is provided with a flow slot 12, the heat of the atmosphere in the bell-type furnace can be transferred to the end of the aluminum strip 22 through the flow slot 12, and the aluminum coil 2 is heated more evenly. The flow slot 12 extends radially outward from the receiving hole 11, and all the flow slots 12 are radially distributed around the receiving hole 11, so the stress and heat at the end of the aluminum coil 2 are more even.

[0026] A plurality of support plates 3 are arranged on the upper side of the support plate 1. The spaces between the support plates 3 form the flow slots 12. The support plates 3 are radially distributed. The support plates 3 can be fixed on the support plates 3 by welding, and the manufacturing difficulty is relatively low. Figure 2 As shown, the support plate 1 is a cylindrical axially symmetrical structure.

[0027] The support frame 4 includes a plurality of support columns 41 extending in the vertical direction, and these support columns 41 are evenly arranged at the outer periphery of the support plate 1, and the aluminum coil 2 can be arranged in the space surrounded by these support columns 41. Specifically, the support columns 41 are detachably connected to the support plate 1, and when the vertical material rack is used to place the aluminum coil 2, each time an aluminum coil 2 is placed, a support plate 1 is continuously built upwards.

[0028] The support plate 1 includes a top plate 13 and a bottom plate 14 both of which are arranged horizontally, and a plurality of vertically arranged support ribs 15 are arranged between the top plate 13 and the bottom plate 14, and these support ribs 15 are used to bear the weight of the aluminum coil 2. The support ribs 15 are radially distributed around the receiving hole 11, so that the force is relatively uniform and can support the relatively heavy aluminum coil 2. The support plate 1 is hollow in shape, light in weight, and thick in thickness, which can meet the situation where the sleeve 21 protrudes longer.

[0029] In this embodiment, the receiving hole 11 is a through hole, so both the upper and lower ends of the sleeve 21 can be inserted into the receiving hole 11, and the vertical size of the vertical rack is relatively compact.

[0030] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical material rack for placing aluminum coils for heat treatment, wherein the aluminum coils include a sleeve and an aluminum strip wound on the sleeve, characterized in that: The vertical material rack comprises at least one horizontally arranged support plate, each of the support plates is arranged in a vertical direction, a support frame is arranged between adjacent support plates, the spacing between adjacent support plates is greater than the axial length of the aluminum coil, the support plate is provided with a receiving hole for accommodating the end of the sleeve, the receiving hole is a through hole, the outer diameter of the sleeve is smaller than the diameter of the receiving hole, so that there is a gap between the outer wall of the end of the sleeve accommodated in the receiving hole and the inner wall of the support plate; there is a gap between one end of a sleeve accommodated in the same receiving hole and another adjacent end of the sleeve; the support plate comprises a top plate and a bottom plate both of which are horizontally arranged, a plurality of vertically arranged support ribs are arranged between the top plate and the bottom plate, and the support ribs are radially distributed around the receiving hole; A plurality of flow slots are provided on the upper side of the support plate, and the heat of the atmosphere in the bell-type furnace can be transferred to the end position of the aluminum strip through the flow slots; the flow slots extend radially outward from the receiving hole, and all the flow slots are radially distributed around the receiving hole; a plurality of support plates are provided on the upper side of the support plate, and the interval space between each of the support plates constitutes the flow slot; The support frame includes a plurality of support columns extending in a vertical direction, and the support columns are arranged on the outer periphery of the support plate; A gas flow channel is provided between the end surface of the aluminum coil and the support plate, and gas flow convection heat exchange is provided on the outer surface of the aluminum coil and the interior of the sleeve.

2. The vertical material rack according to claim 1, characterized in that: The support column is detachably connected to the support plate.

3. A bell-type furnace, characterized in that: The bell-type furnace is provided with a vertical material rack as described in any one of claims 1-2.

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