Air cushion type steady suspension conveying device for aluminum alloy coiled material continuous annealing furnace

Abstract

This invention relates to the field of aluminum alloy coil processing technology and discloses an air-cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils, which solves the problem of aluminum strip easily deviating to the left or right. The device includes a furnace body, on which an air-cushion suspension mechanism is provided. The air-cushion suspension mechanism is equipped with an adjustment mechanism and a filtering mechanism. The air-cushion suspension mechanism includes two horizontal pipes symmetrically located within the furnace body. A narrow slit is provided on the side of each horizontal pipe that is close to the other. A circulating fan and a heat exchanger are fixedly installed on the outside of the furnace body. A connecting pipe is fixedly connected between the circulating fan and the heat exchanger. A side pipe is fixedly connected to the circulating fan, and an air suction pipe is fixedly connected between the side pipe and the furnace body. This invention facilitates the suspension of the aluminum strip and allows hot air to enter the two horizontal pipes and exit from the two narrow slits, facilitating the continuous spraying of transverse hot air towards the edge of the aluminum strip, thereby effectively preventing the aluminum strip from deviating to the left or right.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy coil processing technology, specifically an air cushion type stable suspension conveying device for continuous annealing furnace of aluminum alloy coil. Background Technology

[0002] Aluminum alloy coils are continuous strips of aluminum or aluminum alloy ingots that have been hot-rolled or cold-rolled. They are the basic raw materials for products such as automotive aluminum sheets, electronic aluminum foil, and decorative aluminum strips. After cold rolling, aluminum strips have a large amount of residual stress, high hardness, and poor ductility. They need to be sent to a continuous annealing furnace for constant temperature heat treatment. By raising and holding the temperature, internal stress is eliminated and the substrate is softened to ensure the performance of subsequent stamping and bending processes. Traditional continuous annealing furnaces use metal roller conveyors to lift and transport aluminum strips. At high temperatures, aluminum shavings easily adhere to the rollers and scratch the surface of the sheet. Ultra-thin aluminum foil is also prone to breakage due to the pulling of the roller surface. The existing air cushion conveying solution abandons the solid roller lifting structure. It uses a matching circulating fan to output high-temperature and high-pressure hot air. The airflow is directionally sprayed through the upper and lower spray box array nozzles in the furnace to form a uniform gas buffer cushion on the upper and lower surfaces of the aluminum strip. The aluminum strip is suspended in the air by the buoyancy of the airflow, achieving continuous conveying without solid contact throughout the process. This not only eliminates the defects of sheet surface scratches, but also allows for uniform convection heating and annealing by relying on hot air.

[0003] While conventional air cushion conveying devices can achieve aluminum strip suspension and feeding using hot air, the aluminum strip is prone to lateral deviation during operation. After a slight deviation, the aluminum strip cannot automatically reset and continues to shift to one side of the furnace. This can result in minor issues such as the aluminum strip edge scraping against the spray box and producing a batch of surface defects, or even serious issues such as the aluminum strip jamming, edge bending, or even strip breakage and shutdown. At the same time, deviation will increase the transverse temperature difference of the aluminum strip, resulting in uneven grain structure during sheet annealing and significantly reducing the processing performance of the finished product. Relying solely on the mechanical centering roller at the furnace inlet cannot maintain the aluminum strip in a centered state throughout the entire process, making it difficult to meet the requirements of continuous and stable annealing production of high-precision aluminum alloy coils. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides an air cushion type stable suspension conveying device for continuous annealing furnace of aluminum alloy coil, which effectively solves the problem that aluminum strip is prone to lateral deviation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils, comprising a furnace body, wherein an air cushion type suspension mechanism is provided on the furnace body, and an adjustment mechanism and a filtering mechanism are provided on the air cushion type suspension mechanism;

[0006] The air cushion suspension mechanism includes two horizontal tubes symmetrically located inside the furnace body. Each of the two horizontal tubes has a narrow slit on the side closest to each other. A circulating fan and a heating heat exchanger are fixedly installed on the outside of the furnace body. A connecting pipe is fixedly connected between the circulating fan and the heating heat exchanger. A side pipe is fixedly connected to the circulating fan. An air suction pipe is fixedly connected between the side pipe and the furnace body. An air outlet pipe is fixedly connected to the heating heat exchanger. A rigid pipe is fixedly connected to the air outlet pipe. The end of the rigid pipe away from the air outlet pipe is fixed to the inner side wall of the furnace body. Flexible hoses are fixedly connected between the two horizontal tubes and the rigid pipe.

[0007] Preferably, the furnace body is symmetrically and fixedly connected with an upper air box and a lower air box. The top of the upper air box is symmetrically and fixedly connected with two upper support columns between it and the inner top wall of the furnace body. The bottom of the lower air box is symmetrically and fixedly connected with two lower support columns between it and the inner bottom wall of the furnace body. Multiple spray pipes are provided at equal distances on the side of the upper and lower air boxes that are close to each other. Multiple nozzles are provided at equal distances on the outer side of each spray pipe. A rigid pipe is fixedly connected to both the upper and lower air boxes and the air outlet pipe.

[0008] Preferably, the adjustment mechanism includes a lifting plate movably sleeved between two upper supports, with brackets fixedly connected to both sides of the lifting plate, and the two brackets respectively fixedly sleeved on the outside of the two horizontal tubes.

[0009] Preferably, a support is fixedly installed on the outer side of the furnace body, a drive motor is fixedly connected to the support, a drive shaft is fixedly connected to the drive motor, the end of the drive shaft away from the drive motor extends into the furnace body and is fixedly connected to a side plate, the side plate is located above the lifting plate, a movable rod is rotatably connected to the outer side of the side plate, and the bottom end of the movable rod is rotatably connected to the outer side of the lifting plate.

[0010] Preferably, the filtration mechanism includes a top ring located at the top of the side tube, a sealing ring fixedly connected to the top of the side tube, the top ring fitting against the top of the sealing ring, and a filter cylinder inside the side tube.

[0011] Preferably, a U-shaped handle is fixedly connected to the top of the filter cartridge, and two locking blocks are symmetrically fixedly sleeved on the outer side of the U-shaped handle. The top of each locking block is provided with an annular groove, and a limiting ring is fixedly connected to the bottom of the top ring. The limiting ring is inserted into the two annular grooves.

[0012] Preferably, the top end of the side tube is symmetrically fixedly connected to two slots, and two locking blocks are respectively inserted into the two slots.

[0013] Preferably, a sleeve plate is fixedly sleeved on the outer side of the side tube, and columns are fixedly connected to both sides of the top of the sleeve plate. Slider blocks are movably sleeved on the outer side of the two columns. A connecting shaft is rotatably connected between the two sliders. A rotating plate is fixedly sleeved on the outer side of the connecting shaft. The rotating plate is fixed to the outer side of the top ring.

[0014] Preferably, positioning frames are fixedly connected to both sides of the rotating plate, and positioning blocks are fixedly connected to the top of the two columns. The two positioning frames are movably sleeved on the outside of the two positioning blocks, and bolts are installed between the positioning frames and the positioning blocks.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention can draw hot air from the furnace body by starting the circulating fan, so that the hot air can enter the upper and lower air boxes after being heated by the heating heat exchanger. This allows the hot air to be sprayed out from the nozzles on the upper and lower sides, which facilitates the suspension of the aluminum strip. At the same time, it allows the hot air to enter the two horizontal pipes and be sprayed out from the two narrow slits, which facilitates the continuous spraying of transverse hot air to the edge of the aluminum strip, thereby effectively preventing the aluminum strip from deviating to the left or right.

[0017] 2. This invention enables the lifting plate to slide along the two upper supports by starting the drive motor, thereby facilitating the adjustment of the height of the two horizontal tubes as needed.

[0018] 3. This invention facilitates the insertion of the filter cartridge into the side pipe by inserting two locking blocks into two locking slots respectively. By rotating and moving the rotating plate, the top ring can be made to fit against the top of the sealing ring, which facilitates the insertion of the limiting ring into the two annular grooves. The position of the top ring can be fixed by tightening two bolts, thereby facilitating the fixing of the filter cartridge in the side pipe for filtering the circulating hot air. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the air cushion type stable suspension conveying device for continuous annealing furnace of aluminum alloy coils according to the present invention.

[0022] Figure 2 This is a schematic cross-sectional view of the furnace body of the present invention;

[0023] Figure 3 This is a schematic diagram of the air cushion suspension mechanism of the present invention;

[0024] Figure 4 This is a schematic diagram of the adjustment mechanism structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the filter mechanism structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the disassembled structure of the top ring and side tube of the present invention;

[0027] Figure 7 This is a schematic diagram of the disassembled structure of the U-shaped handle and side tube of the present invention.

[0028] In the diagram: 1. Furnace body; 2. Air cushion suspension mechanism; 201. Horizontal pipe; 202. Narrow slit; 203. Nozzle; 204. Spray pipe; 205. Lower support column; 206. Lower air box; 207. Connecting pipe; 208. Heating heat exchanger; 209. Air outlet pipe; 2010. Rigid pipe one; 2011. Flexible pipe; 2012. Upper support column; 2013. Rigid pipe two; 2014. Side pipe; 2015. Suction pipe; 2016. Circulating fan; 2017. Upper air box; 3. Adjustment mechanism; 301. Lifting plate; 302 303. Movable rod; 304. Side plate; 305. Drive shaft; 306. Drive motor; 307. Support; 408. Bracket; 409. Filter mechanism; 4001. Top ring; 401. Positioning block; 402. Positioning frame; 403. Sleeve plate; 404. Connecting shaft; 405. Slider; 406. Column; 407. Bolt; 408. Rotating plate; 4010. Sealing ring; 4011. U-shaped handle; 4012. Locking block; 4013. Limiting ring; 4014. Annular groove; 4015. Filter cartridge; 4016. Slot. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Example 1, by Figures 1-7 The present invention relates to an air cushion type stable suspension conveying device for a continuous annealing furnace for aluminum alloy coils, comprising a furnace body 1, an air cushion type suspension mechanism 2 provided on the furnace body 1, and an adjustment mechanism 3 and a filtering mechanism 4 provided on the air cushion type suspension mechanism 2.

[0031] In Example 2, based on Example 1, the air cushion suspension mechanism 2 includes two horizontal pipes 201 symmetrically located within the furnace body 1. Each horizontal pipe 201 has a narrow slit 202 on its side closest to the other. A circulating fan 2016 and a heat exchanger 208 are fixedly installed on the outside of the furnace body 1. A connecting pipe 207 is fixedly connected between the circulating fan 2016 and the heat exchanger 208. A side pipe 2014 is fixedly connected to the circulating fan 2016. An air intake pipe 2015 is fixedly connected between the side pipe 2014 and the furnace body 1. An air outlet pipe 209 is fixedly connected to the heat exchanger 208. A rigid pipe 2010 is fixedly connected to the air outlet pipe 209. The end of the rigid pipe 2010 furthest from the air outlet pipe 209 is fixed to... On the inner wall of the furnace body 1, flexible hoses 2011 are fixedly connected between two horizontal pipes 201 and rigid pipe 2010. The upper air box 2017 and the lower air box 206 are symmetrically fixedly connected inside the furnace body 1. Two upper support columns 2012 are symmetrically fixedly connected between the top of the upper air box 2017 and the inner top wall of the furnace body 1. Two lower support columns 205 are symmetrically fixedly connected between the bottom of the lower air box 206 and the inner bottom wall of the furnace body 1. Multiple spray pipes 204 are provided at equal distances on the side of the upper air box 2017 and the lower air box 206 that are close to each other. Multiple nozzles 203 are provided at equal distances on the outer side of each spray pipe 204. Rigid pipe 2013 is fixedly connected between the upper air box 2017 and the lower air box 206 and the air outlet pipe 209.

[0032] First, the circulating fan 2016 is started, drawing in hot air from the furnace body 1 that has already participated in heat exchange through the suction pipe 2015 and side pipe 2014. The hot air enters the heating heat exchanger 208 through the connecting pipe 207 and is heated to the process temperature required for annealing. Then, the hot air is split through the outlet pipe 209. A portion of the hot air enters the upper air box 2017 and the lower air box 206 through two rigid pipes 2013 respectively and is ejected from various nozzles 203. The lower air box 206 sprays high-pressure air vertically upwards. Hot air lifts the aluminum strip upwards, counteracting its own weight and providing the main buoyancy. Meanwhile, the upper air box 2017 sprays hot air downwards, creating a downward airflow that counteracts the upward tendency of the aluminum strip and stabilizes its suspension height. At the same time, another part of the hot air enters the two horizontal pipes 201 through the rigid pipe 2010 and the two flexible pipes 2011 and is sprayed out from the two narrow slits 202, continuously spraying horizontal hot air towards the edge of the aluminum strip, forming two invisible airflow barriers. Finally, the aluminum strip is suspended, preventing it from deviating.

[0033] In Example 3, based on Example 1, the adjustment mechanism 3 includes a lifting plate 301 movably sleeved between two upper support columns 2012. Supports 307 are fixedly connected to both sides of the lifting plate 301. The two supports 307 are respectively fixedly sleeved to the outer sides of two horizontal tubes 201. A support 306 is fixedly installed on the outer side of the furnace body 1. A drive motor 305 is fixedly connected to the support 306. A drive shaft 304 is fixedly connected to the drive motor 305. One end of the drive shaft 304, away from the drive motor 305, extends into the furnace body 1 and is fixedly connected to a side plate 303. The side plate 303 is located above the lifting plate 301. A movable rod 302 is rotatably connected to the outer side of the side plate 303. The bottom end of the movable rod 302 is rotatably connected to the outer side of the lifting plate 301.

[0034] First, start the drive motor 305, which drives the drive shaft 304 to rotate and the side plate 303 to rotate. The movable rod 302 drives the lifting plate 301 to slide along the two upper support columns 2012. Then, the two brackets 307 drive the two horizontal tubes 201 to rise and fall respectively. Finally, the height of the two horizontal tubes 201 can be adjusted according to the requirements.

[0035] In Example 4, based on Example 1, the filter mechanism 4 includes a top ring 401 located at the top of the side pipe 2014. A sealing ring 4010 is fixedly connected to the top of the side pipe 2014, and the top ring 401 fits against the top of the sealing ring 4010. A filter cartridge 4015 is provided inside the side pipe 2014. The filter cartridge 4015 is located below the connection between the suction pipe 2015 and the side pipe 2014, so that the hot gas entering the side pipe 2014 from the suction pipe 2015 can be completely filtered by the filter cartridge 4015. A U-shaped handle 4011 is fixedly connected to the top of the filter cartridge 4015. Two locking blocks 4012 are symmetrically fixedly sleeved on the outside of the U-shaped handle 4011. The top of each locking block 4012 is provided with an annular groove 4014. A limiting ring 4013 is fixedly connected to the bottom of the top ring 401. The limiting ring 4013 is inserted into the two... Inside an annular groove 4014, two slots 4016 are symmetrically fixedly connected to the top of the side tube 2014. Two blocks 4012 are inserted into the two slots 4016 respectively. A sleeve plate 404 is fixedly sleeved on the outside of the side tube 2014. Columns 407 are fixedly connected to both sides of the top of the sleeve plate 404. Slider 406 is movably sleeved on the outside of the two columns 407. A connecting shaft 405 is rotatably connected between the two sliders 406. A rotating plate 409 is fixedly sleeved on the outside of the connecting shaft 405. The rotating plate 409 is fixed to the outside of the top ring 401. Positioning frames 403 are fixedly connected to both sides of the rotating plate 409. Positioning blocks 402 are fixedly connected to the top of the two columns 407. The two positioning frames 403 are movably sleeved on the outside of the two positioning blocks 402 respectively. Bolts 408 are installed between the positioning frames 403 and the positioning blocks 402.

[0036] First, place the filter cartridge 4015 inside the side tube 2014, so that the two locking blocks 4012 are inserted into the two locking slots 4016 respectively. Then, rotate the rotating plate 409 and pull it upward, driving the top ring 401 to move until the top ring 401 is directly above the sealing ring 4010. Then push the top ring 401 downward, driving the rotating plate 409 down, so that the two positioning frames 403 are respectively fitted onto the outside of the two positioning blocks 402, until the top ring 401 is in contact with the top of the sealing ring 4010. At this time, the limiting ring 4013 is inserted into the two annular grooves 4014. Then tighten the two bolts 408 to fix the two positioning frames 403 to the two positioning blocks 402 respectively, thereby limiting the top ring 401. Finally, quickly install the filter cartridge 4015 inside the side tube 2014 to achieve the filtration treatment of circulating hot air.

Claims

1. An air-cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils, comprising a furnace body (1), characterized in that: The furnace body (1) is provided with an air cushion suspension mechanism (2), and the air cushion suspension mechanism (2) is provided with an adjustment mechanism (3) and a filter mechanism (4). The air cushion suspension mechanism (2) includes two horizontal pipes (201) symmetrically located inside the furnace body (1). A narrow slit (202) is provided on the side of each horizontal pipe (201) that is close to the other. A circulating fan (2016) and a heating heat exchanger (208) are fixedly installed on the outside of the furnace body (1). A connecting pipe (207) is fixedly connected between the circulating fan (2016) and the heating heat exchanger (208). A side pipe (201) is fixedly connected to the circulating fan (2016). 4) A suction pipe (2015) is fixedly connected between the side pipe (2014) and the furnace body (1). An air outlet pipe (209) is fixedly connected to the heating heat exchanger (208). A rigid pipe (2010) is fixedly connected to the air outlet pipe (209). One end of the rigid pipe (2010) away from the air outlet pipe (209) is fixed to the inner wall of the furnace body (1). Flexible hoses (2011) are fixedly connected between the two horizontal pipes (201) and the rigid pipe (2010).

2. The air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 1, characterized in that: The furnace body (1) is symmetrically and fixedly connected to an upper air box (2017) and a lower air box (206). The top of the upper air box (2017) is symmetrically and fixedly connected to the inner top wall of the furnace body (1). The bottom of the lower air box (206) is symmetrically and fixedly connected to the inner bottom wall of the furnace body (1). Multiple nozzles (204) are provided at equal distances on the side of the upper air box (2017) and the lower air box (206) that are close to each other. Multiple nozzles (203) are provided at equal distances on the outer side of each nozzle (204). A rigid pipe (2013) is fixedly connected between the upper air box (2017) and the lower air box (206) and the air outlet pipe (209).

3. The air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 1, characterized in that: The adjustment mechanism (3) includes a lifting plate (301) that is movably sleeved between two upper support columns (2012). Both sides of the lifting plate (301) are fixedly connected with brackets (307), and the two brackets (307) are respectively fixedly sleeved on the outside of the two horizontal tubes (201).

4. The air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 1, characterized in that: A support (306) is fixedly installed on the outside of the furnace body (1). A drive motor (305) is fixedly connected to the support (306). A drive shaft (304) is fixedly connected to the drive motor (305). One end of the drive shaft (304) away from the drive motor (305) extends into the furnace body (1) and is fixedly connected to a side plate (303). The side plate (303) is located above the lifting plate (301). A movable rod (302) is rotatably connected to the outside of the side plate (303). The bottom end of the movable rod (302) is rotatably connected to the outside of the lifting plate (301).

5. The air-cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 1, characterized in that: The filtration mechanism (4) includes a top ring (401) located at the top of the side tube (2014), a sealing ring (4010) is fixedly connected to the top of the side tube (2014), the top ring (401) is attached to the top of the sealing ring (4010), and a filter cartridge (4015) is provided inside the side tube (2014).

6. The air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 5, characterized in that: The top of the filter cartridge (4015) is fixedly connected to a U-shaped handle (4011). Two locking blocks (4012) are symmetrically fixedly sleeved on the outside of the U-shaped handle (4011). The top of the two locking blocks (4012) is provided with an annular groove (4014). The bottom of the top ring (401) is fixedly connected to a limiting ring (4013), which is inserted into the two annular grooves (4014).

7. The air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 1, characterized in that: The top of the side tube (2014) is symmetrically fixedly connected to two slots (4016), and two blocks (4012) are inserted into the two slots (4016) respectively.

8. The air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 1, characterized in that: A sleeve plate (404) is fixedly sleeved on the outer side of the side tube (2014). A column (407) is fixedly connected to both sides of the top of the sleeve plate (404). A slider (406) is movably sleeved on the outer side of the two columns (407). A connecting shaft (405) is rotatably connected between the two sliders (406). A rotating plate (409) is fixedly sleeved on the outer side of the connecting shaft (405). The rotating plate (409) is fixed to the outer side of the top ring (401).

9. The air cushion type stable suspension conveying device for a continuous annealing furnace of aluminum alloy coils according to claim 8, characterized in that: The rotating plate (409) is fixedly connected to both sides with positioning frames (403), and the top of the two columns (407) is fixedly connected to positioning blocks (402). The two positioning frames (403) are respectively movably sleeved on the outside of the two positioning blocks (402), and bolts (408) are installed between the positioning frames (403) and the positioning blocks (402).

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