CN112501423A - Continuous solution heat treatment equipment and process for air cushion and roller combined type aluminum strip coiled material - Google Patents
Continuous solution heat treatment equipment and process for air cushion and roller combined type aluminum strip coiled material Download PDFInfo
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- CN112501423A CN112501423A CN202011370821.6A CN202011370821A CN112501423A CN 112501423 A CN112501423 A CN 112501423A CN 202011370821 A CN202011370821 A CN 202011370821A CN 112501423 A CN112501423 A CN 112501423A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 248
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 248
- 238000010438 heat treatment Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 178
- 239000007921 spray Substances 0.000 claims abstract description 157
- 238000001816 cooling Methods 0.000 claims abstract description 149
- 238000005507 spraying Methods 0.000 claims abstract description 115
- 239000000243 solution Substances 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 239000006104 solid solution Substances 0.000 claims abstract description 31
- 239000004411 aluminium Substances 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims abstract description 14
- 238000007605 air drying Methods 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 description 24
- 239000007924 injection Substances 0.000 description 24
- 239000000725 suspension Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 230000035882 stress Effects 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011328 necessary treatment Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
- C21D9/5737—Rolls; Drums; Roll arrangements
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to continuous solution heat treatment equipment and a continuous solution heat treatment process for an air cushion and roller combined type aluminum strip coiled material. On one hand, the invention can meet the solid solution heat treatment of the aluminum strip with the thickness of 0.2-15mm through the matching of the air cushion and the transmission roller, and simultaneously, the aluminum strip is ensured to be evenly stressed and heated in the aluminum strip transmission channel without deformation through the arrangement formed by the upper air spraying box and the lower air spraying box and the combination of the distribution of the upper air spraying hole and the lower air spraying hole and the shapes of the upper air spraying box and the lower air spraying box; another through the combination of forced air cooling and water-cooling, can ensure that water and steam can not scurry into the zone of heating of solution heat treatment stove, combines the intensive degree distribution of water spray unit, the angle of nozzle simultaneously and even to the effort that receives to the aluminium strip for the quick and smooth completion cooling of aluminium strip, in addition, through the air-drying on aluminium strip surface, ensure can not remain the water stain.
Description
Technical Field
The invention belongs to the technical field of aluminum strip heat treatment, and particularly relates to continuous solution heat treatment equipment for an air cushion and roller combined type aluminum strip coiled material, and also relates to a continuous solution heat treatment process for a composite transmission type aluminum strip.
Background
As is known, aluminum coil strip is a non-ferrous metal with extremely wide application in industrial production, and the heat treatment process is a necessary treatment procedure for aluminum coil strip, and generally comprises solution treatment, quenching treatment and aging treatment.
And so-called solution treatment: the heat treatment process is characterized in that an aluminum strip is heated to a high-temperature single-phase region and kept at a constant temperature, so that an excess phase is fully dissolved in a solid solution and then is rapidly cooled to obtain a supersaturated solid solution.
At present, aiming at the aluminum strip with the thickness of less than 5mm, in order to ensure that the aluminum strip is subjected to high-quality and continuous whole-roll heat treatment, more air flotation transmission is adopted in the solid solution heat treatment furnace, therefore, the adopted air cushion generator mainly comprises an upper air box, a lower air box and a fan, wherein hot air flow is respectively guided to the upper air box and the lower air box through the fan, then the bottom of the upper air box blows downwards and the top of the lower air box blows upwards, so that the aluminum strip is circulated in a heating zone, and the continuous heat treatment of the whole-roll aluminum strip is completed under the driving of two-end strip guiding devices.
However, in the floating gas transmission process, the law of gas box distribution, the shape of the gas box and the layout of the air outlet directly influence the acting force applied when the aluminum strip is suspended, and once the aluminum strip is uneven, the aluminum strip is arched or concave, so that the heat treatment quality of the product is influenced.
Meanwhile, in the rapid cooling process, water cooling is most commonly used, but if water cooling is used alone, the following defects exist:
1) the water cooling mainly refers to flushing water to the upper surface and the lower surface of the aluminum strip, and taking away heat through the water, however, some water or hot gas is difficult to escape into a heating zone of the solid solution heat treatment furnace in the water cooling process, so that the temperature in the heating zone cannot be kept constant, the heat treatment quality of the aluminum strip is influenced, and the service life of a hearth is also reduced;
2) in the water cooling process, the control of the water cooling area, the angle of the spray head, the distribution of the spray head and the like are very important, and the cooling deformation of the aluminum strip is caused due to uneven stress;
3) in the water cooling process, water drops are difficult to be left on the surface of the aluminum strip, so that water stains can be formed on the surface of the aluminum strip if the aluminum strip is not processed, and the quality of products is further influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide improved continuous solution heat treatment equipment for the composite type aluminum strip coiled material with the air cushion and the rollers.
Meanwhile, the invention also relates to a continuous solution heat treatment process for the composite transmission type aluminum coil strip.
In order to solve the technical problems, the invention adopts the following technical scheme:
an apparatus for continuous solution heat treatment of an air cushion and roller combined aluminum strip coil, comprising:
a solid solution heat treatment furnace;
the air cushion generator comprises a plurality of air cushion generating units which are sequentially distributed in a heating zone of the solid solution heat treatment furnace and form an aluminum strip transmission channel, wherein each air cushion generating unit comprises an upper air spraying box, a lower air spraying box, a fan and an air duct, the upper air spraying boxes are sequentially distributed in the heating zone at intervals and are positioned above the aluminum strip transmission channel, the lower air spraying boxes are sequentially distributed in the heating zone at intervals and are positioned below the aluminum strip transmission channel, and the upper air spraying boxes and the lower air spraying boxes of each air cushion generating unit are staggered at intervals and are distributed at extreme positions in sine or cosine images; the upper air spraying box is arranged in a way that a cavity formed by one end part to the other end part gradually becomes smaller, the bottom surface of the upper air spraying box is rectangular, the upper air spraying holes are positioned at the end part with larger cavity space and are communicated with the air channel, and the upper air spraying holes are distributed on the bottom surface of the upper air spraying box in an array state; the lower air spraying box is cuboid, the lower air inlet hole is positioned at one end of the cuboid and is communicated with the air channel, and the lower air spraying holes are distributed on the top surface of the lower air spraying box in an array state;
the cooling system comprises a quick cooling chamber communicated with the solid solution heat treatment furnace, a water cooling device arranged in the quick cooling chamber and an exhaust device, wherein the water cooling device comprises a plurality of water spraying units communicated with the solid solution heat treatment furnace and distributed above and below the aluminum strip at intervals, and a water supply unit, each water spraying unit comprises a water spraying pipe extending along the width direction of the aluminum strip and a plurality of nozzles distributed on each water spraying pipe at intervals, a water spraying area formed by the nozzles on each water spraying pipe covers the width direction of the aluminum strip, the nozzles are arranged to intersect with the aluminum strip, water flows formed by the nozzles can drive the aluminum strip to be transmitted to an outlet of the quick cooling chamber, the water spraying units are divided into a first group and a second group, the water spraying units of the first group are distributed at a higher density than the water spraying units of the second group, the first group is arranged close to the inlet of the quick cooling chamber, and the second group is arranged close to the first group; the cooling system also comprises an air cooling device, wherein the air cooling device comprises a first air cooling assembly which is arranged at the inlet of the quick cooling chamber and used for preventing water or gas from flowing into the solid solution heat treatment furnace, and a second air cooling assembly which is arranged at the outlet of the quick cooling chamber and used for air-drying the upper surface and the lower surface of the aluminum strip;
the conveying rollers are sequentially distributed along the length direction of the aluminum strip conveying channel, the top surfaces of the conveying rollers are flush to form a conveying surface, the conveying surface is positioned above the air outlet end surface of the lower air injection box, and the conveying surface is parallel to the air outlet end surface;
and the auxiliary tape leading system comprises a feeding tape leading device and a discharging tape leading device.
Preferably, the upper blowing holes are elongated holes and are distributed at intervals along the length direction of the rectangle and are formed with a plurality of rows in the width direction of the rectangle. Through the arrangement of the elongated hole, the air flow is conveniently and flatly concentrated to blow out, and the stable suspension of the aluminum strip is better realized.
According to a specific embodiment and preferred aspect of the present invention, the plurality of rows of upper air holes are 1.2.3 … N rows, wherein the odd rows are aligned one by one, the even rows are aligned one by one, and the odd rows and the even rows are staggered. The air output can be uniform only through the unique layout.
Preferably, the lower blowing holes are elongated holes, and are distributed at intervals along the length direction of the rectangle and are formed in a plurality of rows in the width direction of the rectangle. Through the arrangement of the elongated hole, the air flow is conveniently and flatly concentrated to blow out, and the stable suspension of the aluminum strip is better realized.
According to still another embodiment and preferred aspect of the present invention, the plurality of rows of the lower air injection holes are respectively 1.2.3 … N rows, wherein the lower air injection holes of the odd-numbered rows are aligned one by one, the lower air injection holes of the even-numbered rows are aligned one by one, and the lower air injection holes of the odd-numbered rows and the lower air injection holes of the even-numbered rows are distributed in a staggered manner. The air output can be uniform only through the unique layout.
Preferably, the cross section of the cavity is in a right trapezoid shape, the inclined edge of the cavity faces upwards, the upper air injection holes are distributed on the surface where the inclined edge corresponds to the right-angle edge, and the upper air inlet is located on the surface where the longer bottom edge is located. The upper air spraying box and the lower air spraying box are different in shape, the implementation of air suspension of the aluminum strip is facilitated, and meanwhile, the aluminum strip is further ensured to stably pass through the aluminum strip transmission channel.
According to another embodiment and preferred aspect of the present invention, the air duct includes two air inlet channels and two air outlet channels, wherein the two air outlet channels are a first air outlet channel and a second air outlet channel, the first air outlet channel is communicated with the upper air inlet hole, and the second air outlet channel is communicated with the lower air inlet hole. The gas flow is controlled by a shunting mode, so that the aluminum strip gas suspension is conveniently controlled.
Preferably, the first air outlet channel and the second air outlet channel are located on two opposite sides of the air inlet channel, and the upper air inlet hole is located above the corresponding end of the lower air inlet hole. The lower air-jet box is reasonable in layout and space utilization, and air supply of the lower air-jet box of the upper air-jet box is realized.
In addition, the air cushion generating unit also comprises an air inlet guide sleeve which is arranged above the heater and positioned in the air inlet channel, wherein the outlet of the air inlet guide sleeve is communicated with the air inlet of the fan. Under the effect of the air inlet guide sleeve, hot air is conveniently pumped into the fan in a large flow rate and then is discharged from the first air outlet channels and the second air outlet channels on the two sides.
Preferably, the inner cavity of the air inlet flow guide sleeve is gradually reduced from the air inlet to the air outlet, and an arc-shaped flow guide part is formed at the edge of the air inlet flow guide sleeve. This provides the best convergence and guidance.
Preferably, the plurality of water spray units forming the first group are divided into an upper spray group and a lower spray group, wherein the plurality of water spray pipes of the upper spray group are uniformly distributed at intervals, the distance from the center of each water spray pipe to the upper surface of the aluminum strip is equal, and the plurality of nozzles of the upper spray group are parallel to each other and aligned; the water spray unit of lower floor's spout group sets up with the water spray unit one-to-one of upper strata spout group, and wherein the nozzle of lower floor's spout group intersects with the nozzle of the upper strata spout group that corresponds and sets up, and the nozzle of a plurality of lower floor's spout groups is parallel to each other and aligns the setting, and the even interval distribution of a plurality of spray pipes of lower floor's spout group, and the center of every spray pipe equals to the distance of aluminium strip lower surface, and a plurality of nozzles of lower floor's spout group are parallel to each other and align the setting. Therefore, the heat dissipation and cooling can be rapidly carried out in the dense area, and the stable transmission of the aluminum strip can be assisted.
Furthermore, the distance from the center of the water spray pipe of the upper spraying group to the upper surface of the aluminum strip is equal to the distance from the center of the water spray pipe of the lower spraying group to the lower surface of the aluminum strip. Therefore, the aluminum strip can be rapidly cooled, the stress on the upper surface and the lower surface of the aluminum strip can be ensured to be uniform, and the aluminum strip is not easy to deform.
According to a specific implementation and preferred aspect of the invention, the water spray pipes of the upper spray group close to the inlet of the rapid cooling chamber are upper water spray pipes I, the water spray pipes of the lower spray group close to the inlet of the rapid cooling chamber are lower water spray pipes I, the water cooling device further comprises upper bent pipes which are communicated with the upper water spray pipes I and are arranged in one-to-one correspondence with the nozzles on the upper water spray pipes I, upper spray heads arranged at the water outlet end parts of the upper bent pipes, lower bent pipes which are communicated with the lower water spray pipes I and are arranged in one-to-one correspondence with the nozzles on the lower water spray pipes I, and lower spray heads arranged at the water outlet end parts of the lower bent pipes, wherein the upper spray heads and the lower spray heads are arranged close to the inlet of the rapid cooling chamber, the distance from the bottom of the upper spray heads to the upper surface of the aluminum strip is less than the distance from the bottom of the corresponding nozzles to the upper surface of the aluminum strip, and the; the distance from the top of the lower spray head to the lower surface of the aluminum strip is less than the distance from the top of the corresponding nozzle to the lower surface of the aluminum strip, and the angle formed by the lower spray head and the aluminum strip is greater than the angle formed by the corresponding nozzle and the aluminum strip. The water spraying angle formed by the upper and lower spray heads is more favorable for the surface attachment of water flow and the aluminum strip, thereby greatly reducing the possibility of cooling water backflow.
Preferably, the plurality of water spray units constituting the second group are divided into an upper spray group and a lower spray group, wherein the distance between the water spray pipes of the upper spray group and the lower spray group is 2-5 times the distance between the water spray pipes of the upper spray group and the lower spray group. Through the change of the distance and the change of the concentration, the water cooling of the surface of the aluminum strip can be optimally realized.
According to a further embodiment and preferred aspect of the present invention, the nozzles of the upper jet groups are divided into a first flight and a second flight along the direction of transport of the aluminum strip, wherein the distance of the bottom of the nozzles of the first flight from the upper surface of the aluminum strip is greater than the distance of the bottom of the nozzles of the second flight from the upper surface of the aluminum strip. Thus being convenient for the aluminum strip to be cooled and shaped under different acting forces.
Preferably, the angle formed by the nozzles of the first echelon and the aluminum strip is an obtuse angle, and the nozzles of the second echelon are arranged perpendicular to the aluminum strip. Through the change of angle, not only be convenient for implement fast cold, parallel transmission under positive pressure moreover to ensure the roughness of aluminium strip cooling design.
Preferably, the top of the nozzles of the lower spray group are equidistant from the lower surface of the aluminum strip, and the nozzles of the lower spray group form an equal angle with the aluminum strip. Therefore, the water cooling device can be matched with the upper jet flow group at an angle and strength, and further, the water cooling can be rapidly carried out.
According to a further embodiment and preferred aspect of the present invention, the water cooling device further comprises an upper spray pipe disposed above the aluminum strip and adjacent to the upper spray group, and a plurality of upper nozzles disposed side by side on the upper spray pipe, wherein the center of the upper spray pipe is located between the center of the spray pipe of the upper spray group and the center of the spray pipe of the upper spray group, and the angle formed by the upper nozzles and the aluminum strip is smaller than the angle formed by the nozzles of the first bank and larger than the angle formed by the nozzles of the second bank and the aluminum strip. Here, the main purpose of the upper nozzle is to push the aluminium strip forward.
In addition, first air cooling subassembly includes first tuyere, first pipeline and first fan, and wherein first tuyere lower extreme stretches into between the water spray unit of first group and the quick-cooling room entry, and is located the top of aluminium strip, and the crossing setting of wind that first tuyere blew off and aluminium strip to can convey the aluminium strip forward. Therefore, under the interception and blowing of the first air nozzle, on one hand, the surface of the aluminum strip entering the quick cooling chamber section is ensured not to have water, and the possibility of water backflow is further prevented; on the other hand, the hot air generated by water cooling is lifted, so that the exhaust device is convenient to exhaust the air out of the quick cooling chamber.
Preferably, the second air cooling assembly is positioned at an outlet of the rapid cooling chamber and comprises a second air nozzle, a third air nozzle, a second fan, a second pipeline and a third pipeline, wherein the second pipeline and the third pipeline are used for communicating the second fan with the second air nozzle and the third air nozzle; the third tuyere is located below the aluminum strip, and the air outlet end of the third tuyere and the air outlet end of the second tuyere are staggered front and back.
The other technical scheme of the invention is as follows: a continuous solution heat treatment process for a composite transmission type aluminum strip, which adopts the continuous solution heat treatment equipment for the composite type aluminum strip coiled material with the air cushion and the rollers, and comprises the following steps:
1) the uncoiled aluminum strip enters the solid solution heat treatment furnace under the connection and the guide of the feeding strip guide device, and the aluminum strip is suspended on the aluminum strip transmission channel or supported on the top surface of the transmission roller by hot air sprayed by the upper air spraying box and the lower air spraying box through the work of each air cushion generation unit of the air cushion generator, and meanwhile, the hot air carries out solid solution heat treatment on the aluminum strip and is transmitted out of the solid solution heat treatment furnace to the quick cooling chamber;
2) the aluminum strip entering the rapid cooling chamber sequentially passes through a first group and a second group which are formed by a plurality of water spraying units, water or gas is prevented from flowing back to the solid solution heat treatment furnace under the blowing of the first air cooling assembly, meanwhile, the gas generated by cooling is pumped out of the rapid cooling chamber by the exhaust device, at the moment, the aluminum strip is conveyed to the outlet of the rapid cooling chamber under the air cooling of the water cooling assembly and the first air cooling assembly, and simultaneously, the upper surface and the lower surface of the aluminum strip are air-dried by the second air cooling assembly at the outlet of the rapid cooling chamber and are conveyed out of the rapid cooling chamber, so that the rapid cooling of the aluminum strip is completed;
3) and under the continuous heat treatment and the rapid cooling in the step 1) and the step 2), the continuous solution heat treatment of the whole aluminum coil strip can be completed.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
on one hand, the invention can meet the solution heat treatment of aluminum strips with different thicknesses through the matching of the air cushion and the transmission roller, and simultaneously, through the arrangement formed by the upper and lower air spraying boxes, the balanced stress and the uniform heating of the aluminum strips in the aluminum strip transmission channel are ensured by combining the distribution of the upper and lower air spraying holes and the shapes of the upper and lower air spraying boxes, and the aluminum strips are not deformed; another through the combination of forced air cooling and water-cooling, can ensure that water and steam can not scurry into the zone of heating of solution heat treatment stove, combines the intensive degree distribution of water spray unit, the angle of nozzle simultaneously and even to the effort that receives to the aluminium strip for the aluminium strip is quick and smooth completion cooling design, in addition, through the air-dry on aluminium strip surface, ensures can not remain the water stain.
Drawings
The invention is described in further detail below with reference to the following figures and specific examples:
FIG. 1 is a schematic front view of a solution heat treatment apparatus of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic front view of the solution heat treatment furnace of FIG. 1;
fig. 4 is a schematic cross-sectional view (enlarged) of one of the air cushion generating units of fig. 3;
FIG. 5 is a schematic distribution view (enlarged) of the upper nozzle holes of the present invention;
FIG. 6 is a schematic distribution view (enlarged) of the lower nozzle holes of the present invention;
FIG. 7 is a schematic front view of the cooling system of FIG. 1;
FIG. 8 is a top view of FIG. 7;
wherein: firstly, a solid solution heat treatment furnace;
② an air cushion generator; q, an air cushion generating unit; q1, an upper air injection box; q10, an upper air injection hole; q2, a lower blowing box; q20, a lower air injection hole; q3, a fan; q4, an air duct; q40, an air inlet channel; q41 and an air outlet channel; q411, a first air outlet channel; q412 and a second air outlet channel; q5, an air inlet guide sleeve; q50, arc diversion part.
Thirdly, a cooling system; 1. a rapid cooling chamber; 2. a water cooling device; 20. a water spray unit; 200. a water spray pipe; 201. a nozzle; A. a first group; a1, an upper layer jet group; a2, lower layer jet group; 200a, an upper spray pipe I; 200b, a lower spray pipe I; 22. bending the pipe upwards; 23. an upper spray head; 24. a lower bent pipe; 25. a lower nozzle; B. a second group; b1, an upper jet flow group; b2, a lower jet group; 21. a water supply unit; b11, first echelon; b12, second echelon; 26. an upper spray pipe; 27. an upper nozzle; 3. an air cooling device; 31. a first air-cooled assembly; 311. a first tuyere; 312. a first conduit; 323. a first fan; 32. a second air cooling assembly; 322. a second tuyere; 323. a third tuyere; 324. a second fan; 325. a second conduit; 326. a third pipeline; 4. an air exhaust device; 40. an exhaust duct; 41. an exhaust fan;
fourthly, a transmission roller;
fifthly, assisting a belt guiding system; 5. a feeding and belt guiding device; 6. a discharging and belt guiding device;
J. a heater;
x, aluminum strip.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1 and 2, the continuous solution heat treatment equipment for the air cushion and roller combined type aluminum strip coil of the embodiment comprises a solution heat treatment furnace (i), an air cushion generator (ii), a cooling system (iii), a transmission roller (iv) and an auxiliary strip guiding system (v).
Specifically, the air cushion generator comprises a plurality of air cushion generating units Q which are sequentially distributed in a heating zone of the solid solution heat treatment furnace I and form an aluminum strip conveying channel, wherein each air cushion generating unit Q comprises an upper air injection box Q1, a lower air injection box Q2, a fan Q3 and an air channel Q4.
And the cooling system comprises a quick cooling chamber 1 communicated with the solid solution heat treatment furnace, a water cooling device 2 arranged in the quick cooling chamber 1, an air cooling device 3 and an exhaust device 4.
The conveying rollers are sequentially distributed along the length direction of the aluminum strip conveying channel, the top surfaces of the conveying rollers are flush to form a conveying surface, the conveying surface is positioned above the air outlet end face of the lower air spraying box q2, and the conveying surface is parallel to the air outlet end face. Here, the transfer roller (iv) is a backup solution, and once the aluminum strip having a thickness of 5mm or less is thick, the solution heat treatment of the aluminum strip may be performed by using the transfer roller (iv) and suspending the aluminum strip by an air cushion.
The auxiliary tape leading system comprises a feeding tape leading device 5 and a discharging tape leading device 6, wherein the feeding tape leading device 5 and the discharging tape leading device 6 are in a conventional tape receiving roller transmission mode, namely, the tape receiving roller rotates to ensure any working condition and can complete rapid tape threading and tape leading.
Referring to fig. 3, a plurality of upper blowing boxes q1 are sequentially spaced above the aluminum strip conveying path in the heating zone, and a plurality of lower blowing boxes q2 are sequentially spaced below the aluminum strip conveying path in the heating zone.
In this example, the plurality of upper air jet boxes Q1 and the plurality of lower air jet boxes Q2 of each air cushion generating unit Q are offset from each other and distributed in a sine or cosine image at an extreme position. In this way, each air cushion generating unit Q forms one cycle, and the plurality of air cushion generating units Q are distributed in the upper and lower spray boxes Q1 and Q2 in a cycle-by-cycle manner.
As shown in fig. 4 and 5, the upper air box q1 has a rectangular bottom surface, and has a cavity gradually reduced from one end to the other end.
The upper air inlet holes are positioned at the end part with larger cavity space and are communicated with the air duct q4, and the upper air inlet holes q10 are distributed on the bottom surface of the upper air spray box q1 in an array state.
The cross section of the cavity is in a right-angled trapezoid, the inclined edge of the cavity faces upwards, the upper air injection holes q10 are distributed on the surface where the inclined edge corresponds to the right-angled edge, and the upper air inlet is located on the surface where the longer bottom edge (the right side in fig. 2) is located. The upper air spraying box and the lower air spraying box are different in shape, the implementation of air suspension of the aluminum strip is facilitated, and meanwhile, the aluminum strip X can be ensured to stably pass through the aluminum strip transmission channel.
The upper air injection holes q10 are elongated holes and are distributed at intervals along the length direction of the rectangle and are formed in a plurality of rows in the width direction of the rectangle. Through the arrangement of the elongated hole, the air flow is conveniently and flatly concentrated to blow out, and the stable suspension of the aluminum strip is better realized.
In this example, three rows of upper air injection holes q10 are provided on the bottom surface of the upper air injection box q1, and are respectively a first row, a second row and a third row, wherein the upper air injection holes q10 on the first row and the third row are aligned one by one, and the upper air injection holes q10 on the first row or the third row and the upper air injection holes q10 on the second row are distributed in a staggered manner. The air output can be uniform only through the unique layout.
The lower air spraying box q2 is cuboid, the lower air inlet is positioned at one end of the cuboid and is communicated with the air duct q4, and the lower air spraying holes q20 are distributed on the top surface of the lower air spraying box q2 in an array state.
As shown in fig. 6, the lower air injection holes q20 are elongated holes, and are arranged at intervals along the longitudinal direction of the rectangle and in three rows in the width direction of the rectangle. Through the arrangement of the elongated hole, the air flow is conveniently and flatly concentrated to blow out, and the stable suspension of the aluminum strip is better realized.
In this example, the three rows of lower air injection holes q20 are respectively a first row, a second row and a third row, wherein the lower air injection holes q20 in the first row and the third row are aligned one by one, and the lower air injection holes q20 in the first row or the third row and the lower air injection holes q20 in the second row are distributed in a staggered manner. The air output can be uniform only through the unique layout.
The air duct q4 includes an air inlet channel q40 and an air outlet channel q41, wherein the air outlet channels q41 are divided into two groups, which are respectively a first air outlet channel q411 and a second air outlet channel q412, the first air outlet channel q411 is communicated with the upper air inlet hole, and the second air outlet channel q412 is communicated with the lower air inlet hole. The gas flow is controlled by a shunting mode, so that the aluminum strip gas suspension is conveniently controlled.
Specifically, the first air outlet channel q411 and the second air outlet channel q412 are located on two opposite sides of the air inlet channel q40, and the upper air inlet hole is located above the corresponding end of the lower air inlet hole. The lower air-jet box is reasonable in layout and space utilization, and air supply of the lower air-jet box of the upper air-jet box is realized.
In addition, the air cushion generating unit Q further comprises an air inlet guide sleeve Q5 which is arranged above the heater J and is positioned in the air inlet channel Q40, wherein the outlet of the air inlet guide sleeve Q5 is communicated with the air inlet of the fan Q3. Under the action of the air inlet guide sleeve q5, the fan can conveniently suck hot air into the fan at a large flow rate and then discharge the hot air from the first air outlet channel and the second air outlet channel at the two sides.
Specifically, the inner cavity of the air inlet flow guide sleeve q5 is gradually reduced from the air inlet to the air outlet. This provides the best convergence and guidance.
Meanwhile, the side edge of the cross section of the air inlet guide sleeve q5 is in arc transition from top to bottom, and an arc guide part q50 which is arched downwards is formed at the lower sleeve opening, so that the formed airflow obstruction is small, the circulation of hot airflow is convenient, and the uniformity of heat treatment is ensured.
Referring to fig. 7, the water cooling device 2 includes a plurality of water spraying units 20 and water supplying units 21, which are connected to each other and are spaced above and below the aluminum strip X.
The air cooling device 3 comprises a first air cooling assembly 31 which is arranged at the inlet of the quick cooling chamber 1 and prevents water or gas from entering the solid solution heat treatment furnace (I), and a second air cooling assembly 32 which is arranged at the outlet of the quick cooling chamber 1 and is used for air-drying the upper surface and the lower surface of the aluminum strip X.
The exhaust device 4 includes an exhaust duct 40 and an exhaust fan 41 communicating with the rapid cooling chamber 1.
Referring to fig. 8, each water spraying unit 20 includes water spraying pipes 200 extending along the width direction of the aluminum strip X, and a plurality of nozzles 201 distributed at intervals on each water spraying pipe 200, wherein the water spraying area formed by the plurality of nozzles 201 on each water spraying pipe 200 covers the width direction of the aluminum strip X, the nozzles 201 are arranged to intersect with the aluminum strip X, and the water flow formed by the plurality of nozzles 201 can drive the aluminum strip X to be transmitted to the outlet of the rapid cooling chamber 1.
The plurality of water spray units 20 are divided into a first group a and a second group B, wherein the water spray units 20 of the first group a are distributed more densely than the water spray units 20 of the second group B, and the first group a is disposed near the inlet of the rapid cooling chamber and the second group B is disposed near the first group a.
The plurality of water spray units 20 constituting the first group a are divided into an upper spray group a1 and a lower spray group a 2.
The water spray units 20 of the upper spray group A1 and the water spray units 20 of the lower spray group A2 are arranged in a one-to-one correspondence.
Specifically, a plurality of spray pipes 200 of the upper spray group a1 are uniformly distributed at intervals, and the distance from the center of each spray pipe 200 to the upper surface of the aluminum strip X is equal; the plurality of nozzles 201 of the upper spray pattern a1 are arranged in parallel and in alignment with each other.
A plurality of water spray pipes 200 of the lower spray group A2 are uniformly distributed at intervals, and the distance from the center of each water spray pipe 200 to the lower surface of the aluminum strip X is equal; the nozzles 201 of the lower spray group a2 intersect the corresponding nozzles 201 of the upper spray group a1, and the nozzles 201 of the plurality of lower spray groups a2 are arranged in parallel and in alignment with each other. Therefore, the heat dissipation and cooling can be rapidly carried out in the dense area, and the stable transmission of the aluminum strip can be assisted.
The distance from the center of the water spray pipe 200 of the upper spray group A1 to the upper surface of the aluminum strip X is equal to the distance from the center of the water spray pipe 200 of the lower spray group A2 to the lower surface of the aluminum strip X. Therefore, the aluminum strip can be rapidly cooled, the stress on the upper surface and the lower surface of the aluminum strip can be ensured to be uniform, and the aluminum strip is not easy to deform.
Meanwhile, the water spray pipe 200 of the upper layer jet flow group A1 close to the inlet of the rapid cooling chamber 1 is an upper water spray pipe I200 a, the water spray pipe 200 of the lower layer jet flow group A2 close to the inlet of the rapid cooling chamber 1 is a lower water spray pipe I200 b, the water cooling device 2 further comprises an upper bent pipe 22 communicated with the upper water spray pipe I200 a and arranged in one-to-one correspondence with the nozzles 201 on the upper water spray pipe I200 a, an upper spray head 23 arranged at the water outlet end part of each upper bent pipe 22, a lower bent pipe 24 communicated with the lower water spray pipe I200 b and arranged in one-to-one correspondence with the nozzles 201 on the lower water spray pipe I200 b, and a lower spray head 25 arranged at the water outlet end part of each lower bent pipe, wherein the upper spray head 23 and the lower spray head 25 are arranged close to the inlet of the rapid cooling chamber 1, the distance from the bottom of the upper spray head 23 to the upper surface of the aluminum strip X is less than the distance from the bottom of the corresponding spray nozzle 201 to the upper surface of the aluminum strip X, the angle formed by the upper spray head 23 and the aluminum strip X is larger than the angle formed by the corresponding spray nozzle 201 and the aluminum strip X; the distance from the top of the lower spray head 25 to the lower surface of the aluminum strip X is less than the distance from the top of the corresponding nozzle 201 to the lower surface of the aluminum strip X, and the angle formed by the lower spray head 25 and the aluminum strip X is larger than the angle formed by the corresponding nozzle 201 and the aluminum strip X. The water spraying angle formed by the upper and lower spray heads is more favorable for the surface attachment of water flow and the aluminum strip, thereby greatly reducing the possibility of cooling water backflow.
The plurality of water spray units 20 constituting the second group B are divided into an upper spray group B1 and a lower spray group B2, wherein the distance between the water spray pipes 200 of the upper spray group B1 and the lower spray group B2 is 2-5 times the distance between the water spray pipes 200 of the upper spray group A1 and the lower spray group A2. Through the change of the distance and the change of the concentration, the water cooling of the surface of the aluminum strip can be optimally realized.
The nozzles 201 of the upper jet group B1 are divided into a first flight B11 and a second flight B12 along the conveying direction of the aluminum strip, wherein the distance from the bottom of the nozzles 201 of the first flight B11 to the upper surface of the aluminum strip X is greater than the distance from the bottom of the nozzles 201 of the second flight B12 to the upper surface of the aluminum strip X. Thus, the aluminum strip X can be cooled and shaped under different acting forces.
The angle formed by the nozzles 201 of the first flight b11 and the aluminum strip X is obtuse, and the nozzles 201 of the second flight b12 are arranged perpendicular to the aluminum strip X. Through the change of angle, not only be convenient for implement fast cold, parallel transmission under positive pressure moreover to ensure the roughness of aluminium strip cooling design.
The top of the nozzle 201 of the lower jet group B2 is at the same distance from the lower surface of the aluminum strip X, and the nozzle 201 of the lower jet group B2 forms the same angle with the aluminum strip X. Therefore, the water cooling device can be matched with the upper jet flow group at an angle and strength, and further, the water cooling can be rapidly carried out.
The water cooling device 2 further comprises an upper water spray pipe 26 arranged above the aluminum strip X and close to the upper spray group B1, and a plurality of upper nozzles 27 arranged on the upper water spray pipe 26 side by side, wherein the center of the upper water spray pipe 26 is positioned between the center of the water spray pipe 200 of the upper spray group B1 and the center of the water spray pipe 200 of the upper spray group A1, and the angle formed by the upper nozzles 27 and the aluminum strip X is smaller than the angle formed by the nozzles 201 of the first echelon B11 and the aluminum strip X and larger than the angle formed by the nozzles 201 of the second echelon B12 and the aluminum strip X. Here, the main purpose of the upper nozzle is to push the aluminium strip forward.
Meanwhile, the water spraying units 20 distributed above and below the aluminum strip are divided into three areas from the inlet of the rapid cooling chamber 1 to the outlet of the rapid cooling chamber 1, the first area is a hard quenching area and corresponds to the first group, the water spraying units 20 distributed above and below the aluminum strip in the area are provided with a group of independent automatic control units, the second area is a soft quenching area and corresponds to the second group, the water spraying units distributed above and below the aluminum strip in the area are also provided with a group of independent automatic control units, the cooling water flow and pressure of the two groups of independent automatic control units are related to the material of the aluminum strip, the heat treatment temperature and the conveying speed of the strip, and the purpose of controlling the deformation amount of the aluminum thermal treatment can be achieved through a control system; the third zone is a cooling zone corresponding to the area from the upper nozzle 27 to the outlet of the rapid cooling chamber 1, and the water spraying units 20 distributed on the aluminum strip in the third zone are provided with a group of independent manual control units, namely, the surface of the aluminum strip is cooled by manually adjusting the flow and the pressure of the upper nozzle 27.
In addition, the first air cooling assembly 31 includes a first air nozzle 311, a first pipeline 312 and a first fan 313, wherein the lower end of the first air nozzle 311 extends between the water spray unit 20 of the first group a and the inlet of the rapid cooling chamber 1 and is located above the aluminum strip X, and the air blown by the first air nozzle 311 intersects with the aluminum strip X and can convey the aluminum strip X forward. Therefore, under the interception and blowing of the first air nozzle, on one hand, the surface of the aluminum strip entering the quick cooling chamber section is ensured not to have water, and the possibility of water backflow is further prevented; on the other hand, the hot air generated by water cooling is lifted, so that the exhaust device is convenient to exhaust the air out of the quick cooling chamber.
The second air cooling assembly 32 is located at the outlet of the rapid cooling chamber 1, and includes a second air nozzle 322, a third air nozzle 323, a second fan 324, and a second pipeline 325 and a third pipeline 326 which communicate the second fan 324 with the second air nozzle 322 and the third air nozzle 323, wherein the second air nozzle 322 is located above the aluminum strip X, and the lower portion of the second air nozzle 322 is bent and inclined inward; the third air nozzle 323 is positioned below the aluminum strip X, and the air outlet end of the third air nozzle 323 and the air outlet end of the second air nozzle 322 are staggered front and back.
In summary, the continuous solution heat treatment process for the composite transmission type aluminum coiled strip of the embodiment includes the following steps:
1) the uncoiled aluminum strip X enters a solid solution heat treatment furnace I under the connection of a feeding strip guiding device, meanwhile, the hot air sprayed by an upper air spraying box Q1 and a lower air spraying box Q2 suspends the aluminum strip X in an aluminum strip transmission channel by the operation of each air cushion generating unit Q of an air cushion generator II, meanwhile, the hot air carries out solid solution heat treatment on the aluminum strip X, and finally, the aluminum strip X is conveyed out of the solid solution heat treatment furnace I under the connection of a discharging strip guiding device;
2) the aluminum strip X is transmitted to the fast cooling chamber 1 from the solid solution heat treatment furnace I, at the moment, the exhaust fan 41 is started, the aluminum strip X enters between the upper layer jet flow group A1 and the lower layer jet flow group A2 of the first group A, the nozzle 201 sprays water to cool the aluminum strip X in the width direction in a covering mode, the aluminum strip X is clamped by water flow formed up and down to transmit to the upper jet flow group B1 and the lower jet flow group B2 of the second group B, the upper nozzle 23 and the lower nozzle 25 spray water closely, and the aluminum strip X entering between the upper jet flow group B1 and the lower jet flow group B2 is cooled down by the long-distance water spray formed by the first echelon B11 corresponding to the upper jet flow group B1, the nozzle 201 of the second echelon B12 and the nozzle 201 of the lower jet flow group B2 with the same angle, so as to ensure the stable cooling and shaping of the aluminum strip X, meanwhile, the aluminum strip X is conveyed to an outlet of the rapid cooling chamber 1 by pushing water sprayed by the upper nozzle 27, when the aluminum strip X moves to the outlet of the rapid cooling chamber 1, the upper surface and the lower surface of the aluminum strip X are swept by the second air nozzle 322 and the third air nozzle 323 which are arranged up and down at the moment, so that no residual water drops are left on the surface of the aluminum strip X, hot air generated by cooling is extracted from the rapid cooling chamber 1 by the exhaust fan 41, and finally the hot air is transmitted out of the rapid cooling chamber to finish rapid cooling of the aluminum strip X;
3) and under the continuous heat treatment and the rapid cooling in the step 1) and the step 2), the continuous solution heat treatment of the whole aluminum coil strip can be completed.
In summary, the present embodiment has the following advantages:
1. the continuous solution heat treatment of the coiled aluminum strips with different thicknesses of 0.2-15mm can be met by matching the air cushion with the transmission roller (adopting a graphite roller), and when the thickness of the aluminum strips is less than 5mm, the aluminum strips can be completely floated without being scratched; the aluminum strip with the thickness larger than 5mm is compositely conveyed by the air cushion and the graphite roller in the combined furnace, and the graphite roller can not scratch the surface of the aluminum strip;
2. the air-jet boxes which are specially distributed in the furnace are combined with the local air-jet holes which are specially distributed on the box body, so that an air cushion can be formed on the continuously passing aluminum strip, the air-jet effect is rapid and uniform, the aluminum strip is ensured to be evenly stressed and heated in the aluminum strip transmission channel, deformation is avoided, and the continuous solution heat treatment of the whole aluminum coil strip can be implemented;
3. the air flow of the upper and lower air spraying boxes can be set according to requirements by shunting the air outlet channel, so that different thicknesses are met, and the air-suspension device is particularly suitable for implementation of air suspension of aluminum strips with the thickness of less than 5 mm;
4. the combination of air cooling and water cooling can ensure that water and hot gas cannot flow into the heating zone of the solid solution heat treatment furnace, greatly shorten the cooling time and realize quick cooling;
5. the density distribution of the water spraying units, the angles of the nozzles and the spray heads, the distance between the nozzles and the spray heads and the surface of the aluminum strip and the uniform acting force on the aluminum strip are combined, so that the aluminum strip is conveyed and cooled and shaped at the same time, and the probability of deformation is greatly cooled;
6. through the arrangement of the second air nozzle and the third air nozzle of the quick cooling chamber, the upper surface and the lower surface of the aluminum strip can be cooled by air, the surface of the aluminum strip can be dried, water drops cannot remain, and water stains are formed;
7. the auxiliary tape leading device ensures any working condition and can finish rapid tape threading and leading.
The present invention has been described in detail in order to enable those skilled in the art to understand the invention and to practice it, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.
Claims (10)
1. An apparatus for continuous solution heat treatment of an air cushion and roller combined aluminum strip coil, comprising:
a solid solution heat treatment furnace;
the air cushion generator comprises a plurality of air cushion generating units which are sequentially distributed in a heating zone of the solid solution heat treatment furnace and form an aluminum strip transmission channel, wherein each air cushion generating unit comprises an upper air spraying box, a lower air spraying box, a fan and an air channel;
the cooling system comprises a quick cooling chamber communicated with the solid solution heat treatment furnace, a water cooling device arranged in the quick cooling chamber and an exhaust device, wherein the water cooling device comprises a plurality of water spraying units and water supply units, the water spraying units are communicated and distributed above and below the aluminum strip at intervals;
an auxiliary tape leading system comprises a feeding tape leading device and a discharging tape leading device,
the method is characterized in that:
the upper air spraying boxes are sequentially distributed above the heating area at intervals, the lower air spraying boxes are sequentially distributed below the aluminum strip transmission channel at intervals, and the upper air spraying boxes and the lower air spraying boxes of each air cushion generating unit are staggered at intervals and distributed at extreme positions in sine or cosine images; the upper air spraying box is arranged in a way that a cavity formed by one end part to the other end part gradually becomes smaller, the bottom surface of the upper air spraying box is rectangular, the upper air spraying holes are positioned at the end part with larger cavity space and are communicated with the air channel, and the upper air spraying holes are distributed on the bottom surface of the upper air spraying box in an array state; the lower air spraying box is cuboid, the lower air inlet hole is positioned at one end of the cuboid and is communicated with the air channel, and the lower air spraying holes are distributed on the top surface of the lower air spraying box in an array state;
each water spraying unit comprises a water spraying pipe extending along the width direction of the aluminum strip, and a plurality of nozzles distributed on each water spraying pipe at intervals, wherein a water spraying area formed by the nozzles on each water spraying pipe covers the width direction of the aluminum strip, the nozzles are arranged to intersect with the aluminum strip, water flow formed by the nozzles can drive the aluminum strip to be conveyed to the outlet of the rapid cooling chamber, the water spraying units are divided into a first group and a second group, the water spraying units in the first group are distributed at a higher density than the water spraying units in the second group, the first group is arranged close to the inlet of the rapid cooling chamber, and the second group is arranged close to the first group; the cooling system also comprises an air cooling device, wherein the air cooling device comprises a first air cooling assembly which is arranged at the inlet of the quick cooling chamber and used for preventing water or gas from flowing into the solid solution heat treatment furnace, and a second air cooling assembly which is arranged at the outlet of the quick cooling chamber and used for air-drying the upper surface and the lower surface of the aluminum strip;
the heat treatment equipment also comprises a plurality of transmission rollers which are sequentially distributed along the length direction of the aluminum strip transmission channel, wherein the top surfaces of the transmission rollers are flushed to form a transmission surface, and the transmission surface is positioned above the air outlet end surface of the lower air spraying box and is arranged in parallel with the air outlet end surface.
2. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 1, wherein: go up the wind blowing hole with lower wind blowing hole shape the same, the distribution is also the same, wherein go up the wind blowing hole and be the elongated hole, and just be formed with multirow, multirow along rectangle length direction interval distribution in rectangle width direction go up the wind blowing hole, and be 1.2.3 … N respectively and be listed as, wherein the odd number place go up the wind blowing hole one-to-one alignment setting, even number place go up the wind blowing hole one-to-one alignment setting, the odd number place go up the wind blowing hole with the even number place is listed as go up the staggered distribution mutually between the wind blowing hole.
3. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 1, wherein: the air duct comprises an air inlet channel and an air outlet channel, wherein the air outlet channels are divided into two groups and are respectively a first air outlet channel and a second air outlet channel, the first air outlet channel and the second air outlet channel are positioned on two opposite sides of the air inlet channel, and the upper air inlet hole is positioned above the corresponding end part of the lower air inlet hole.
4. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 3, wherein: the air cushion generating unit also comprises an air inlet guide sleeve which is arranged above the heater and positioned in the air inlet channel, wherein the outlet of the air inlet guide sleeve is communicated with the air inlet of the fan; the inner cavity of the air inlet guide sleeve is gradually reduced from the air inlet to the air outlet, and an arc-shaped guide part is formed at the edge of the air inlet guide sleeve.
5. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 1, wherein: the water spraying units forming the first group are divided into an upper layer spraying group and a lower layer spraying group, wherein the spraying pipes of the upper layer spraying group are uniformly distributed at intervals, the distance from the center of each spraying pipe to the upper surface of the aluminum strip is equal, and the spraying nozzles of the upper layer spraying group are parallel to each other and are arranged in an aligned mode; the water spray unit of lower floor's spout group with the water spray unit one-to-one of upper strata spout group sets up, wherein the nozzle of lower floor's spout group with correspond the nozzle of upper strata spout group is crossing to be set up, and a plurality of the nozzle of lower floor's spout group is parallel to each other and aligns the setting, a plurality of lower floor's spout group the even interval distribution of spray pipe, and every the center of spray pipe extremely the distance of aluminium strip lower surface equals, a plurality of lower floor's spout group the nozzle is parallel to each other and aligns the setting.
6. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 5, wherein: the distance from the center of the water spray pipe of the upper spray group to the upper surface of the aluminum strip is equal to the distance from the center of the water spray pipe of the lower spray group to the lower surface of the aluminum strip.
7. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 5, wherein: the water spray pipes of the upper layer spray group close to the inlet of the rapid cooling chamber are upper water spray pipes I, the water spray pipes of the lower layer spray group close to the inlet of the rapid cooling chamber are lower water spray pipes I, the water cooling device also comprises an upper bent pipe which is communicated with the upper spray pipe I and is arranged corresponding to the nozzles on the upper spray pipe I one by one, an upper spray head which is arranged at the water outlet end part of each upper bent pipe, a lower bent pipe which is communicated with the lower spray pipe I and is arranged corresponding to the nozzles on the lower spray pipe I one by one, and a lower spray head which is arranged at the water outlet end part of each lower bent pipe, wherein the upper spray head and the lower spray head are arranged close to the inlet of the quick cooling chamber, the distance from the bottom of the upper spray head to the upper surface of the aluminum strip is less than the distance from the bottom of the corresponding spray nozzle to the upper surface of the aluminum strip, the angle formed by the upper spray head and the aluminum strip is larger than the angle formed by the corresponding spray nozzle and the aluminum strip; the distance between the top of the lower spray head and the lower surface of the aluminum strip is less than the distance between the top of the corresponding nozzle and the lower surface of the aluminum strip, and the angle formed by the lower spray head and the aluminum strip is greater than the angle formed by the corresponding nozzle and the aluminum strip.
8. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 1, wherein: the plurality of water spraying units forming the second group are divided into an upper spraying group and a lower spraying group, wherein the distance between the water spraying pipes of the upper spraying group and the lower spraying group is 2-5 times of the distance between the water spraying pipes of the upper spraying group and the lower spraying group; the nozzles of the upper jet group are divided into a first echelon and a second echelon along the conveying direction of the aluminum strip, wherein the distance from the bottom of the nozzle of the first echelon to the upper surface of the aluminum strip is greater than the distance from the bottom of the nozzle of the second echelon to the upper surface of the aluminum strip; the angle formed by the nozzles of the first echelon and the aluminum strip is an obtuse angle, and the nozzles of the second echelon and the aluminum strip are arranged vertically.
9. The apparatus for continuous solution heat treatment of air cushion and roller composite aluminum strip coil as claimed in claim 8, wherein: the water cooling device further comprises an upper water spraying pipe arranged above the aluminum strip and close to the upper water spraying pipe arranged in the upper water spraying group, and a plurality of upper nozzles arranged on the upper water spraying pipe side by side, wherein the center of the upper water spraying pipe is positioned between the center of the water spraying pipe of the upper water spraying group and the center of the water spraying pipe of the upper water spraying group, and the angle formed by the upper nozzles and the aluminum strip is smaller than that formed by the nozzles of a first echelon and the aluminum strip and larger than that formed by the nozzles of a second echelon and the aluminum strip.
10. A continuous solution heat treatment process for a composite transmission type aluminum coiled strip is characterized by comprising the following steps: the solution heat treatment process employs a continuous solution heat treatment apparatus for an air cushion and roller combined aluminum strip coil as claimed in any one of claims 1 to 9, and comprises the steps of:
1) the uncoiled aluminum strip enters the solid solution heat treatment furnace under the connection and the guide of the feeding strip guide device, and the aluminum strip is suspended on the aluminum strip transmission channel or supported on the top surface of the transmission roller by hot air sprayed by the upper air spraying box and the lower air spraying box through the work of each air cushion generation unit of the air cushion generator, and meanwhile, the hot air carries out solid solution heat treatment on the aluminum strip and is transmitted out of the solid solution heat treatment furnace to the quick cooling chamber;
2) the aluminum strip entering the rapid cooling chamber sequentially passes through a first group and a second group which are formed by a plurality of water spraying units, water or gas is prevented from flowing back to the solid solution heat treatment furnace under the blowing of the first air cooling assembly, meanwhile, the gas generated by cooling is pumped out of the rapid cooling chamber by the exhaust device, at the moment, the aluminum strip is conveyed to the outlet of the rapid cooling chamber under the air cooling of the water cooling assembly and the first air cooling assembly, and simultaneously, the upper surface and the lower surface of the aluminum strip are air-dried by the second air cooling assembly at the outlet of the rapid cooling chamber and are conveyed out of the rapid cooling chamber, so that the rapid cooling of the aluminum strip is completed;
3) and under the continuous heat treatment and the rapid cooling in the step 1) and the step 2), the continuous solution heat treatment of the whole aluminum coil strip can be completed.
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| CN111560547A (en) * | 2020-05-08 | 2020-08-21 | 天津忠旺铝业有限公司 | Preparation method of 5182-O-state aluminum alloy plate for automobile |
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