Cooling device for aluminum alloy medium plate
By designing a cooling box with a window, the problem of thick plates in aluminum alloy with the cooling time of the furnace is too long, realize the rapid cooling of aluminum alloy plates and improvement of mechanical properties, while improving the efficiency of the annealing treatment.
Patent Information
- Application Number
- CN202421096138.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In the prior art, the furnace cooling time of aluminum alloy medium and thick plates is too long, occupying annealing furnace resources, resulting in low processing efficiency.
Design a cooling box with a window, which can be installed in aluminum alloy plates, and connects the environment in the annealing furnace through the thermal circulating window. After the annealing, the cooling box is removed out of the ignition furnace to settle down to avoid occupying an extent.
The rapid cooling of aluminum alloy plates has been achieved, the cooling time is extended, the mechanical performance of the plate is improved, and the occupation of the low -end furnace is avoided, and the processing efficiency of processing is improved.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of annealing furnaces, in particular to a cooling device for medium and thick aluminum alloy plates. Background Art
[0002] Annealing refers to a metal heat treatment process in which the metal is slowly heated to a certain temperature, maintained for a sufficient time, and then cooled at an appropriate speed. For the annealing of aluminum alloy medium and thick plates, our unit uses a gas-fired trolley furnace as the annealing furnace. The aluminum alloy medium and thick plates are first neatly stacked in the furnace, and then the basic heating, nitrogen purging, primary and secondary furnace temperature setting are carried out in sequence, and finally the temperature is cooled. Different cooling methods are used according to the different process requirements of the product, including cooling in the furnace, natural cooling after leaving the furnace, and air cooling after leaving the furnace.
[0003] For aluminum alloy plate products that require furnace cooling in the furnace, in order to prevent the aluminum alloy plates from being exposed to the air and causing "air quenching", a slower cooling method is used to ensure that the tensile strength of the aluminum alloy plates' mechanical properties is reduced to the minimum, and the elongation and plasticity are optimized. This can only be achieved by stopping the annealing furnace, closing the furnace door, and slowly cooling the aluminum alloy plates in the furnace over time.
[0004] The above-mentioned cooling method with furnace cooling has the following conditions: the time for the furnace to cool to room temperature is ≥48h. The longer the time for the furnace to cool to room temperature, the higher the thermal insulation capacity. The entire cooling time is long, and for medium and thick aluminum alloy plates, a longer cooling time is required to ensure that the mechanical properties, elongation and plasticity of the medium and thick aluminum alloy plates are optimal. However, since the annealing furnace will be occupied during the cooling process, the annealing furnace cannot currently perform other annealing operations, resulting in low processing efficiency of aluminum alloy plates and low industrial production efficiency. Summary of the invention
[0005] In order to solve the problem that conventional aluminum alloy plates have a long cooling time with the furnace and occupy the annealing furnace, resulting in low plate processing efficiency, the utility model provides a cooling device for aluminum alloy medium and thick plates, which is provided with a cooling box with a window that can be loaded with the aluminum alloy plates, and the cooling box can be moved in and out of the annealing furnace. When cooling, the cooling box is moved out of the annealing furnace, and the cooling box together with the aluminum alloy plates therein are hoisted to the room temperature area and left to cool statically, without occupying the annealing furnace, and the performance of the plates can be improved by leaving them to cool statically for a long time.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A cooling device for aluminum alloy medium and thick plates, comprising a cooling box capable of loading the aluminum alloy medium and thick plates, the cooling box comprising a box bottom plate, a heat insulation pad, a box top cover and a window, and a heat circulation window;
[0008] The upper surface of the box bottom plate is evenly paved with the insulation pad, and the box top cover is also arranged above the box bottom plate. The insulation pad is pressed by the edges around the bottom of the box top cover to prevent the heat loss in the cooling box. The cross section of the box top cover is smaller than the cross section of the box bottom plate. A lifting hook is also arranged on the box bottom plate to facilitate lifting the entire cooling box.
[0009] A plurality of windows are evenly arranged on both sides of the box top cover, so that the heat in the annealing furnace can easily enter the cooling box. A plurality of thermal circulation windows for opening and closing the windows are evenly hinged on both sides of the box top cover. The thermal circulation windows correspond to the windows one by one, so that it is convenient to control the opening and closing of the windows individually. A support rod is hinged on the thermal circulation window, and the support rod is pressed against the box top cover to open the thermal circulation window. The support rod can ensure the opening state of the thermal circulation window.
[0010] Furthermore, the box bottom plate includes a steel bracket and a steel plate. The steel bracket is a frame structure formed by welding multiple steel sections, which improves the structural strength of the entire box bottom plate. The steel plate is arranged above the steel bracket, and the steel plate covers the entire upper surface of the steel bracket, ensuring the flatness of the box bottom plate.
[0011] Furthermore, the thermal insulation pad is laid on the upper surface of the steel plate, and the lifting hooks are arranged on both sides of the steel bracket, with at least two lifting hooks on each side, so as to facilitate stable lifting of the box bottom plate and lift the aluminum alloy plate and box top cover on the box bottom plate together.
[0012] Furthermore, the box top cover comprises a frame plate, a box cover body and a reinforcement frame, the frame plate has a U-shaped cross section, the frame plate presses the insulation pad, thereby increasing the contact area between the box top cover and the insulation pad, and the box cover body is arranged above the frame plate;
[0013] The box cover body is a rectangular cover structure with an opening at the lower end. The reinforcing frame is arranged on the box cover body. The reinforcing frame covers the top of the box cover body and the surrounding side walls. The reinforcing frame is connected and fixed downward to the frame plate, so as to facilitate the protection of the box cover body and improve the pressure resistance of the box cover body.
[0014] Furthermore, the box cover body comprises an outer box body, an inner box body and an interlayer of thermal insulation cotton, and the interlayer of thermal insulation cotton is arranged between the outer box body and the inner box body, thereby improving the thermal insulation performance of the box cover body;
[0015] The windows are arranged on both sides of the box cover body, the cross section of the windows is rectangular, a rectangular sealing frame is arranged on the box cover body around the windows, the cross section of the sealing frame is larger than the window, and the inner wall of the sealing frame is provided with heat insulation cotton;
[0016] The heat circulation windows are hinged on both sides of the box cover body, the heat circulation windows are matched with the sealing frame, and the heat circulation windows press the heat insulation cotton in the sealing frame to avoid heat loss.
[0017] Furthermore, the support rods are hinged on both sides of the heat circulation window, and the support rods are telescopic rods, which are convenient for adjusting the opening angle of the heat circulation window. One end of the support rod is tightly against the joint between the frame plate and the box cover body to open the heat circulation window.
[0018] Through the above technical solution, the beneficial effects of the utility model are:
[0019] The utility model has a reasonable structural design. During annealing, the aluminum alloy sheet is loaded into the cooling box, and the cooling box is opened by opening the heat circulation window to ensure the open state of the cooling box. In this state, the cooling box and the aluminum alloy sheet are sent into the annealing furnace together for annealing. During the cooling process after annealing, the cooling box and the aluminum alloy sheet are moved out of the annealing furnace together. At this time, the heat circulation window is closed to ensure the closed state of the cooling box. In this state, the cooling box is hoisted by a crane, and then hoisted together with the aluminum alloy sheet to the room temperature area for static cooling.
[0020] The entire cooling operation performed by the cooling box of the utility model can be consistent with the original annealing system execution basis, thereby ensuring the consistency of the entire batch annealing. In addition, the cooling time can be extended, effectively ensuring that the tensile strength of the mechanical properties of the aluminum alloy medium and thick plates will be minimized, and the elongation and plasticity will be optimized. At the same time, because it is lifted to the room temperature area for cooling, it will not occupy the annealing furnace space, ensuring that the annealing furnace can perform subsequent annealing operations, which can improve the annealing process efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 The utility model is a front view of a cooling device for medium and thick aluminum alloy plates.
[0022] Figure 2 The utility model is a schematic diagram of a cooling box disassembly of a cooling device for a medium-thick aluminum alloy plate.
[0023] Figure 3 The utility model is a top view of a box bottom plate of a cooling device for medium and thick aluminum alloy plates.
[0024] Figure 4 The utility model is a schematic diagram of a box cover body of a cooling device for medium and thick aluminum alloy plates.
[0025] Figure 5 The utility model is a cross-sectional view of a box cover body of a cooling device for medium-thick aluminum alloy plates.
[0026] The numbers in the attached drawings are: 1 box bottom plate, 101 steel bracket, 102 steel plate, 2 insulation cotton pad, 3 box top cover, 31 frame plate, 32 box cover body, 33 reinforcement frame, 4 window, 5 heat circulation window, 6 outer box body, 7 inner box body, 8 interlayer insulation cotton, 9 lifting ear, 10 sealing frame, 11 handle, 12 support rod, 13 lifting hook. DETAILED DESCRIPTION
[0027] The following is a detailed description of the specific implementation manners of the present utility model in conjunction with the accompanying drawings:
[0028] As Figure 1~Figure 5 shown, a cooling device for medium-thick aluminum alloy plates includes a cooling box that can hold medium-thick aluminum alloy plates. The number of cooling boxes is at least one, and here the number of cooling boxes is two. The two cooling boxes are stacked vertically, which can reduce the floor area, as Figure 1 shown. The two cooling boxes enter and exit the annealing furnace together, and the annealing operation of a large number of medium-thick aluminum alloy plates can be realized at one time.
[0029] The cooling box includes a box bottom plate 1, a heat insulation cotton pad 2, a box top cover 3, a window 4, and a heat circulation window 5, as Figure 2 shown. The box bottom plate 1 is a component at the bottom of the cooling box. The medium-thick aluminum alloy plates to be stacked are placed on the box bottom plate 1, so the box bottom plate 1 should have sufficient structural strength.
[0030] In this embodiment, the box bottom plate 1 includes a steel bracket 101 and a steel plate 102. The steel bracket 101 is a frame structure formed by welding multiple sections of steel, with high structural strength. A steel plate 102 is arranged above the steel bracket 101. The steel plate 102 covers the entire upper surface of the steel bracket 101, ensuring the flatness of the steel bracket 101 and avoiding the hollowing of the steel bracket 101. Through the load-bearing of the steel plate 102, the stability of the placement of the medium-thick aluminum alloy plates can be ensured, as Figure 3 shown.
[0031] A heat insulation cotton pad 2 is evenly laid on the upper surface of the box bottom plate 1. Here, the heat insulation cotton pad 2 is laid on the upper surface of the steel plate 102. The heat insulation cotton pad 2 is made of silica cotton pad, which has good high-temperature resistance and complies with the standard provisions of GB / T 3003-2017 Refractory Fibers and Products.
[0032] A box top cover 3 is also arranged above the box bottom plate 1. The cross-section of the box top cover 3 is smaller than that of the box bottom plate 1. After the box top cover 3 and the box bottom plate 1 are enclosed, a closed space is formed to store the medium-thick aluminum alloy plates. The box top cover 3 includes a frame plate 31, a box cover body 32, and a strengthening frame 33. The cross-section of the frame plate 31 is in the shape of a "return" character. The box cover body 32 is arranged above the frame plate 31. The box cover body 32 is a rectangular cover body structure with an open bottom end, as Figure 4 shown.
[0033] In order to increase the connection strength between the frame plate 31 and the box cover 32, a reinforcing frame 33 is provided on the box cover 32, and the reinforcing frame 33 is welded with square pipes. The reinforcing frame 33 covers the top of the box cover 32 and the surrounding side walls, and the reinforcing frame 33 is connected and fixed to the frame plate 31 downward, so that the reinforcing frame 33 can protect the box cover 32 and improve its anti-deformation ability, and also increase the structural strength of the entire box top cover 3, meeting the requirements of stacking the cooling box up and down.
[0034] After the box cover body 32 is placed on the steel bracket 101, it is equivalent to the box cover body 32 covering the thermal insulation pad 2, and the thermal insulation pad 2 is pressed on the edges around the bottom of the box top cover 3, that is, the frame plate 31 presses the thermal insulation pad 2 to ensure the sealing of the joint between the frame plate 31 and the steel bracket 101, and at the same time, the aluminum alloy medium and thick plate in the cooling box is also located on the thermal insulation pad 2.
[0035] The box top cover 3, as the main body of the entire cooling box, needs to have good thermal insulation performance. Here, the box cover body 32 includes an outer box body 6, an inner box body 7 and an interlayer insulation cotton 8. Figure 5 An interlayer of thermal insulation cotton 8 is arranged between the outer box body 6 and the inner box body 7. The interlayer of thermal insulation cotton 8 is also made of silicate cotton, which is the layer structure of the box cover body 32 and can improve the thermal insulation performance of the cooling box.
[0036] Multiple windows 4 are evenly arranged on both sides of the top cover 3 for communicating with the environment in the annealing furnace. Specifically, windows 4 are arranged on both sides of the cover body 32, and the cross section of the window 4 is rectangular. Multiple thermal cycle windows 5 for opening and closing the windows 4 are evenly hinged on both sides of the top cover 3, that is, the thermal cycle windows 5 are hinged on both sides of the cover body 32, and the thermal cycle windows 5 correspond to the windows 4 one by one, and each window 4 can be opened and closed separately.
[0037] In order to ensure that the window 4 can be reliably sealed when the heat circulation window 5 is closed, a rectangular sealing frame 10 is provided on the box cover 32 around the window 4, and the cross section of the sealing frame 10 is larger than the window 4. The inner wall of the sealing frame 10 is provided with thermal insulation cotton, which is also made of silicate cotton, and the thermal insulation cotton is not shown in the figure.
[0038] After the heat circulation window 5 is closed, the heat circulation window 5 and the sealing frame 10 are matched, and the heat circulation window 5 presses the heat insulation cotton in the sealing frame 10 to ensure reliable sealing and prevent heat loss. The layer structure of the heat circulation window 5 is the same as the layer structure of the box cover body 32, and has a certain heat preservation performance.
[0039] A handle 11 is provided outside the heat circulation window 5, and the heat circulation window 5 can be turned over by the handle 11, so as to facilitate manual opening and closing of the heat circulation window 5. When the heat circulation window 5 is opened, in order to ensure the opening state of the heat circulation window 5, a support rod 12 is hinged on the heat circulation window 5, and the support rod 12 is hinged on both sides of the heat circulation window 5, and the support rod 12 is tightly pressed against the box top cover 3 to open the heat circulation window 5. Specifically, after the support rod 12 is turned over, one end of the support rod 12 is tightly pressed against the joint of the frame plate 31 and the box cover body 32, so that the heat circulation window 5 can be opened.
[0040] In order to change the opening angle of the thermal circulation window 5, the support rod 12 is a telescopic rod, and the support rod 12 can adopt a structure combining a threaded rod and a threaded sleeve, and its length can be adjusted by twisting the support rod 12. By changing the length of the support rod 12, the flip angle of the thermal circulation window 5 is changed, and then the opening size of the window 4 is adjusted.
[0041] In order to facilitate the lifting and movement of the entire cooling box, a lifting hook 13 is also provided on the box bottom plate 1. Specifically, lifting hooks 13 are evenly arranged on both sides of the steel bracket 101. There are at least two lifting hooks 13 on each side, and the shape of the lifting hook 13 is similar to a trumpet. At the same time, a lifting lug 9 is provided on the box top cover 3. The lifting lug 9 is connected by a lifting device, so that the box top cover 3 can be opened, and then the cooling box can be opened, and the aluminum alloy plate can be taken in and out. The height of the lifting lug 9 does not exceed the reinforcing frame 33, ensuring that the lifting lug 9 does not interfere with the stacking of the cooling box.
[0042] The principle of the utility model is as follows: firstly, the box bottom plate 1 is hoisted onto the trolley of the annealing furnace, and then the insulation pad 2 is laid flat on the box bottom plate 1, and then the aluminum alloy medium and thick plates are neatly stacked on the insulation pad 2, and finally the box top cover 3 is hoisted onto the box bottom plate 1, the box top cover 3 covers the aluminum alloy medium and thick plates, and the edge of the box top cover 3 can be completely attached to the insulation pad 2. The heat circulation window 5 is opened manually in turn, and the support rod 12 is turned over to press against the box top cover 3, so that the heat circulation window 5 is always in the open state.
[0043] According to the above method, a cooling box containing aluminum alloy medium and thick plates is stacked on top of the cooling box to achieve the stacking of two cooling boxes. The trolley of the annealing furnace enters the annealing furnace, and the annealing furnace performs basic heating, nitrogen purge, primary temperature setting and secondary temperature setting in sequence. After the annealing is completed, the furnace door is opened, and the trolley of the annealing furnace drives the cooling box out of the furnace. The support rods 12 on both sides of the cooling box are manually removed one by one, and the furnace out operation stops. At this time, the thermal circulation window 5 is also closed.
[0044] By connecting the lifting hook 13 with the crane hook, the entire cooling box and the aluminum alloy medium and thick plates therein can be lifted to the room temperature area, and then the cooling is started. The entire cooling time to room temperature is ≥168h. The cooling time is extended, which can effectively ensure that the tensile strength of the aluminum alloy plate mechanical properties is reduced to the minimum, and the elongation and plasticity are optimized. In addition, the temperature is not cooled in the annealing furnace, so as to avoid occupying the annealing furnace and not affecting the normal annealing of other aluminum alloy plates, thereby ensuring the processing efficiency of the aluminum alloy plates.
[0045] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.
Claims
1. A cooling device for medium and thick aluminum alloy plates, characterized in that: The invention comprises a cooling box capable of housing medium and thick aluminum alloy plates, the cooling box comprising a box bottom plate (1), a thermal insulation pad (2), a box top cover (3), a window (4) and a thermal circulation window (5); The upper surface of the box bottom plate (1) is evenly paved with the insulation pad (2), the box top cover (3) is also arranged above the box bottom plate (1), the insulation pad (2) is pressed on the edges around the bottom of the box top cover (3), the cross section of the box top cover (3) is smaller than the cross section of the box bottom plate (1), and a lifting hook (13) is also arranged on the box bottom plate (1); A plurality of windows (4) are evenly provided on both sides of the box top cover (3), and a plurality of heat circulation windows (5) for opening and closing the windows (4) are evenly hingedly provided on both sides of the box top cover (3), the heat circulation windows (5) and the windows (4) corresponding to each other one by one, and a support rod (12) is hingedly provided on the heat circulation window (5), and the support rod (12) is tightly pressed against the box top cover (3) to open the heat circulation window (5).
2. The cooling device for medium and thick aluminum alloy plates according to claim 1, characterized in that: The box bottom plate (1) comprises a steel bracket (101) and a steel plate (102); the steel bracket (101) is a frame structure formed by welding a plurality of steel sections; the steel plate (102) is arranged above the steel bracket (101); the steel plate (102) covers the entire upper surface of the steel bracket (101).
3. The cooling device for medium and thick aluminum alloy plates according to claim 2, characterized in that: The thermal insulation pad (2) is laid on the upper surface of the steel plate (102), and the lifting hooks (13) are arranged on both sides of the steel bracket (101), with the number of the lifting hooks (13) on each side being at least two.
4. The cooling device for medium and thick aluminum alloy plates according to claim 1, characterized in that: The box top cover (3) comprises a frame plate (31), a box cover body (32) and a reinforcement frame (33); the frame plate (31) has a "U"-shaped cross section; the frame plate (31) presses the thermal insulation pad (2); and the box cover body (32) is arranged above the frame plate (31); The box cover body (32) is a rectangular cover body structure with an opening at the lower end. The reinforcing frame (33) is arranged on the box cover body (32). The reinforcing frame (33) covers the upper part of the box cover body (32) and the surrounding side walls. The reinforcing frame (33) is downwardly connected and fixed to the frame plate (31).
5. The cooling device for medium and thick aluminum alloy plates according to claim 4, characterized in that: The box cover body (32) comprises an outer box body (6), an inner box body (7) and an interlayer thermal insulation cotton (8), wherein the interlayer thermal insulation cotton (8) is arranged between the outer box body (6) and the inner box body (7); The windows (4) are arranged on both sides of the box cover body (32), the cross section of the window (4) is rectangular, a rectangular sealing frame (10) is arranged on the box cover body (32) around the window (4), the cross section of the sealing frame (10) is larger than the window (4), and the inner wall of the sealing frame (10) is provided with heat insulation cotton; The heat circulation window (5) is hingedly connected to both sides of the box cover (32); the heat circulation window (5) and the sealing frame (10) are matched with each other; the heat circulation window (5) presses the heat insulation cotton in the sealing frame (10).
6. The cooling device for medium and thick aluminum alloy plates according to claim 4, characterized in that: The support rod (12) is hingedly connected to both sides of the heat circulation window (5); the support rod (12) is a telescopic rod; one end of the support rod (12) is tightly pressed against the joint between the frame plate (31) and the box cover body (32) to open the heat circulation window (5).