Hood-type bright annealing furnace to improve annealing efficiency

Abstract

The present invention provides a hood-type bright annealing furnace for improving annealing efficiency, which includes a base, a furnace table, an inner cover, and an outer cover. The furnace table is fixedly installed on the base, and a through hole for the furnace table to be installed is opened on the base. The coil is placed on the top of the furnace table. The inner cover is arranged outside the coil and installed on the furnace table. The furnace table heats the outside of the inner cover. The outer cover is arranged outside the inner cover and installed on the base. A circulating fan for filling protective gas into the inner cover is arranged at the through hole on the base. The outer cover is divided into a heating cover and a cooling cover. The heating cover and the cooling cover are alternately installed on the base. A cooling fan for cooling the inside is arranged on the cooling cover, and a nozzle for cooling the inside is arranged in the cooling cover. The hood-type bright annealing furnace for improving annealing efficiency described in the present invention realizes rapid heating and cooling through the arrangement of the furnace table and the inner cover, and the alternating installation of the heating cover and the cooling cover of the outer cover, thereby improving the annealing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of annealing furnaces, and in particular to a hood-type bright annealing furnace capable of improving annealing efficiency. Background Art

[0002] With the development of industrial production, annealing furnaces are important equipment for heat treatment of metal materials. Their efficiency and performance directly affect the quality of materials and production costs. Existing annealing furnaces have problems such as low efficiency and high energy consumption when processing coils, which limits the improvement of production efficiency and material performance. Traditional hood-type bright annealing furnaces lack effective cooling and protection measures, resulting in uneven oxidation and cooling of materials during annealing, affecting product quality. In addition, the single heating hood design requires a long time to switch between heating and cooling processes, further reducing production efficiency.

[0003] At present, the typical complete set configuration includes: 1 heating cover, 1 cooling cover, 1 stainless steel inner cover, 1 furnace base, 1 valve frame, and 1 electric control. The steel strip to be processed is loaded on the furnace base from bottom to top, with the upper roll pressing the lower roll, and then 3-5 rolls are loaded on the furnace base, and then the stainless steel inner cover is buckled, and the furnace is filled with protective gas after washing. The heating cover / cooling cover is buckled on the outside of the inner cover for heat treatment. The cooling methods of the cooling cover usually include strong convection air cooling and spray cooling. In the strong convection air cooling method, after the fan on the top of the cooling cover is started, the cooling air flows in from the gap between the cooling cover and the furnace table, and is then sucked out from the top by the fan. However, air cooling and spray cooling are both carried out from the top of the cooling cover, and the airflow direction is fixed, which easily causes uneven cooling temperature of the inner cover and affects the quality of the coil.

[0004] After recrystallization bright annealing in this furnace loading method, the steel coil loaded at the bottom is heavily loaded, which is very likely to cause edge adhesion, affecting the yield rate. In addition, the larger the single furnace loading of steel strip, the fewer the circulation times of the protective gas in the furnace. The reduction in the number of cycles will lead to poor uniformity of furnace temperature, which in turn causes poor uniformity of the performance of the steel strip. In addition, the annealing cycle will also be extended, usually requiring 43 to 50 hours, especially the cooling time of more than 20 hours. At the same time, the inconvenience of the loading and unloading process also causes a waste of time, further affecting the annealing efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a hood-type bright annealing furnace with improved annealing efficiency, so as to solve the problems of low efficiency, high energy consumption and uneven cooling of the annealing furnace in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A hood-type bright annealing furnace for improving annealing efficiency comprises a base, a furnace table, an inner hood and an outer hood; the furnace table is fixedly mounted on the base, a through hole for the furnace table to be mounted on the base, and a coil is placed on the top of the furnace table; the inner hood is arranged outside the coil and mounted on the furnace table, and the furnace table heats the outside of the inner hood; the outer hood is arranged outside the inner hood and mounted on the base; a circulating fan for filling protective gas into the inner hood is arranged at the through hole on the base; the outer hood is divided into a heating hood and a cooling hood, the heating hood and the cooling hood are alternately mounted on the base, a cooling fan for cooling the interior is arranged on the cooling hood, and a nozzle for cooling the interior is arranged in the cooling hood.

[0008] By adopting the above technical solution, due to the setting of the furnace table and the inner cover, and the alternating installation of the heating cover and the cooling cover of the outer cover, rapid heating and cooling are achieved, and the annealing efficiency is improved. At the same time, the protective gas is filled into the inner cover through the circulating fan, which effectively avoids the oxidation of the material during the annealing process and ensures the product quality.

[0009] Furthermore, at least two groups of the furnace table and the inner cover are arranged on the base, and a ring seat for mounting the inner cover is arranged at each through hole, and a locking piece for locking the inner cover is rotatably arranged on the side of the ring seat.

[0010] By adopting the above technical solution, by increasing the number of groups of the furnace table and the inner cover, and by providing a ring seat and a locking member, the installation efficiency and stability of the inner cover are improved, and the annealing process is further optimized.

[0011] Furthermore, the air outlet of the cooling fan is equipped with a connecting pipe connected to the cooling hood, a spraying device for controlling water flow is arranged between the connecting pipe and the cooling hood, the spraying device is respectively connected to the cooling hood and the connecting pipe, and an adjusting device for adjusting the airflow velocity is arranged on the spraying device.

[0012] By adopting the above technical solution, through the setting of the connecting pipe and the spraying device, and the regulating function of the regulating device, accurate control of the cooling air flow and water flow is achieved, and the cooling efficiency and uniformity are improved.

[0013] Furthermore, the spraying device includes a circulation bin connected to the connecting pipe and a lifting mechanism for controlling the opening of the nozzle. The adjusting device and the nozzle are respectively installed at the bottom of the circulation bin, and the nozzle is located in the middle of the adjusting device. The airflow in the connecting pipe passes through the circulation bin and enters the adjusting device and the lifting mechanism. The mist sprayed from the nozzle follows the airflow in the adjusting device and enters the cooling bin.

[0014] By adopting the above technical solution and setting up the circulation chamber and the lifting mechanism, precise control of the mist and airflow is achieved, further improving the cooling efficiency and uniformity.

[0015] Furthermore, a plurality of inclined plates are arranged on the circumference of the bottom of the circulation bin, a mounting plate is fixedly arranged in the middle of the plurality of inclined plates, the air flow is discharged from the gap between two adjacent inclined plates, and the nozzle is fixedly arranged at the bottom of the mounting plate;

[0016] And / or, the lifting mechanism includes a water pipe connected to the nozzle, a valve needle arranged to be lifted inside the water pipe, and a cylinder body located at the top of the water pipe, a large piston fixedly arranged on the valve needle and lifted in the circulation chamber, and a small piston fixedly arranged at the bottom of the large piston and lifted in the cylinder body.

[0017] By adopting the above technical solution, through the setting of the inclined plate and the mounting plate, and the precise control of the jacking mechanism, efficient mixing and distribution of the airflow and mist is achieved, thereby improving the cooling efficiency.

[0018] Furthermore, a secondary pipe is connected between the water pipe and the cylinder body, and the water flow in the water pipe enters the cylinder body through the secondary pipe to lift the small piston.

[0019] By adopting the above technical solution and setting up the auxiliary pipe, accurate control of the water flow is achieved, and the response speed and stability of the jacking mechanism are improved.

[0020] Furthermore, a pressing mechanism is provided on the top of the circulation chamber, and the pressing mechanism drives the valve needle to seal the spray port of the nozzle when the pressure of the lifting mechanism is insufficient.

[0021] By adopting the above technical solution and setting the pressing mechanism, it is ensured that the nozzle will not spray by mistake when the pressure of the lifting mechanism is insufficient, thereby improving the safety and reliability of the system.

[0022] Furthermore, the pressing mechanism includes a buckle cover fixedly arranged on the top of the circulation chamber, a first spring supported between the buckle cover and the large piston, a push cover lifted and arranged on the buckle cover to support the valve needle, and a second spring is arranged between the push cover and the valve needle;

[0023] The buckle cover is fixedly provided with a threaded rod for the push cover to slide, the buckle cover is penetrated on the screw rod, and the threaded rod is threadedly connected with two nuts, and the two nuts fix the buckle cover at a preset position.

[0024] By adopting the above technical solution and by setting the buckle cover and the spring, the position of the valve needle is accurately controlled, thereby improving the stability and response speed of the lifting mechanism.

[0025] Furthermore, the adjustment device includes a fixed ring fixedly arranged at the bottom of the circulation bin, an adjustment plate rotatably arranged on the fixed ring, and a ring sleeve for controlling the rotation of the adjustment plate. Multiple adjustment plates are arranged along the circular axis of the fixed ring, and the multiple adjustment plates are staggered and fitted to form a polygonal circle.

[0026] By adopting the above technical solution and arranging the fixing ring and the adjusting plate, the air flow velocity and direction can be precisely adjusted, thereby improving the cooling efficiency and uniformity.

[0027] Furthermore, an arc groove is opened laterally on the side wall of the ring sleeve, a linkage ball which moves following the arc groove is arranged on the adjustment plate, the linkage ball drives the adjustment plate to rotate, a gear ring is arranged on the fixed ring, a gear meshing with the gear ring is arranged on the ring sleeve, and a motor which drives the gear is also arranged on the ring sleeve.

[0028] By adopting the above technical solution, through the arrangement of the arc groove and the linkage ball, and the drive of the motor, precise control of the adjustment plate is achieved, and the flexibility and efficiency of the adjustment device are improved.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The hood-type bright annealing furnace of the present invention realizes rapid heating and cooling and improves annealing efficiency by arranging a furnace table and an inner hood and alternately installing a heating hood and a cooling hood of an outer hood; by filling the inner hood with protective gas through a circulating fan, oxidation of the material during the annealing process is effectively avoided and product quality is guaranteed; by increasing the number of groups of the furnace table and the inner hood and arranging a ring seat and a locking member, the installation efficiency and stability of the inner hood are improved and the annealing process is further optimized.

[0031] In addition, by setting the pipe and the spraying device, and the regulating function of the regulating device, the cooling airflow and water flow are precisely controlled, and the cooling efficiency and uniformity are improved. By setting the circulation chamber and the lifting mechanism, the mist and airflow are precisely controlled, and the cooling efficiency and uniformity are further improved; by setting the inclined plate and the mounting plate, and the precise control of the lifting mechanism, the airflow and mist are efficiently mixed and distributed, and the cooling efficiency is improved; by setting the auxiliary pipe, the water flow is precisely controlled, and the response speed and stability of the lifting mechanism are improved.

[0032] In addition, the setting of the downward pressure mechanism ensures that the nozzle will not spray accidentally when the pressure of the lifting mechanism is insufficient, thereby improving the safety and reliability of the system; the setting of the buckle cover and the spring realizes precise control of the valve needle position, thereby improving the stability and response speed of the lifting mechanism; the setting of the fixing ring and the adjusting plate realizes precise adjustment of the air flow rate and direction, thereby improving the cooling efficiency and uniformity; the setting of the arc groove and the linkage ball, as well as the drive of the motor, realizes precise control of the adjusting plate, thereby improving the flexibility and efficiency of the adjusting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0034] In the attached picture:

[0035] Figure 1 This is a schematic diagram of the overall structure of a bell-type bright annealing furnace for improving annealing efficiency according to an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the internal structure of a bell-type bright annealing furnace for improving annealing efficiency according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the connecting pipe and the nozzle part according to an embodiment of the present invention;

[0038] Figure 4 A partial schematic diagram of a locking member according to an embodiment of the present invention;

[0039] Figure 5 This is an exploded schematic diagram of a spraying device according to an embodiment of the present invention;

[0040] Figure 6 A bottom view of a spraying device according to an embodiment of the present invention;

[0041] Figure 7 This is an exploded schematic diagram of the jacking mechanism according to an embodiment of the present invention;

[0042] Figure 8 It is an exploded schematic diagram of the pressing mechanism according to an embodiment of the present invention;

[0043] Fig. 9 A schematic diagram of an adjusting device according to an embodiment of the present invention;

[0044] Fig.10 The opening state diagram of the regulating device according to the embodiment of the present invention;

[0045] Fig.11 A partial schematic diagram of an adjustment plate according to an embodiment of the present invention;

[0046] Fig.12 It is a schematic diagram of the installation of multiple spraying devices according to an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1. Base; 2. Furnace; 3. Inner cover; 4. Outer cover;

[0049] 5. Spraying device; 501. Circulation chamber;

[0050] 502, lifting mechanism; 5021, water pipe; 5022, valve needle; 5023, cylinder body; 5024, large piston; 5025, small piston; 5026, auxiliary pipe;

[0051] 503, inclined plate; 504, mounting plate;

[0052] 505, pressing mechanism; 5051, buckle cover; 5052, first spring; 5053, push cover; 5054, second spring; 5055, threaded rod; 5056, nut;

[0053] 6. Adjustment device; 601. Fixing ring; 602. Adjustment plate; 603. Ring sleeve; 604. Arc groove; 605. Linking ball; 606. Gear ring; 607. Gear; 608. Motor;

[0054] 7. Nozzle; 8. Ring seat;

[0055] 9. Locking piece; 901. Bolt; 902. U-shaped groove; 903. Nut;

[0056] 10. Cooling fan; 11. Take over. DETAILED DESCRIPTION

[0057] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0058] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0059] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0060] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0061] This embodiment relates to a bell-type bright annealing furnace with improved annealing efficiency. Figure 1 , Figure 2 and Figure 3 As shown, it includes a base 1, a furnace table 2, an inner cover 3, and an outer cover 4.

[0062] Among them, the furnace table 2 is fixedly installed on the base 1, and a through hole for installing the furnace table 2 is opened on the base 1. The coil is placed on the top of the furnace table 2, the inner cover 3 is arranged on the outside of the coil and installed on the furnace table 2, the furnace table 2 heats the outside of the inner cover 3, the outer cover 4 is arranged on the outside of the inner cover 3 and installed on the base 1, and a circulating fan for filling the inner cover 3 with protective gas is arranged at the through hole on the base 1. The outer cover 4 is divided into a heating cover and a cooling cover, which are alternately installed on the base 1, and a cooling fan 10 for cooling the interior is arranged on the cooling cover, and a nozzle 7 for cooling the interior is arranged in the cooling cover.

[0063] It is worth mentioning that the furnace table 2 is installed at the through hole of the base 1, and the airflow blown by the circulating fan can enter the inner cover 3 from the furnace table 2. A plurality of coils are arranged from top to bottom. In this embodiment, two rolls are used, and the upper roll is loaded on the furnace table 2 in the form of pressing the lower roll. The reason for using two rolls is that the height of the inner cover 3 and the outer cover 4 can be reduced, thereby increasing the number of cycles of the protective gas, improving the annealing efficiency, and avoiding the edge of the coil. The inner cover 3 and the furnace table 2 are sealed and installed to separate the combustion space from the coil to prevent oxygen from entering. The protective gas is hydrogen or a hydrogen mixture. The protective gas enters the inner cover 3 from the middle of the furnace table 2 through the circulating fan. The protective gas circulates in the inner cover 3 to protect the coil from oxidation. The outer cover 4 and the base 1 are sealed and installed. There is a combustion space between the outer cover 4 and the inner cover 3. When heating the coil, the heating cover is buckled on the base 1, and when cooling, the cooling cover is buckled on the base 1. The cooling fan 10 blows air into the cooling cover, and the nozzle 7 sprays the cooling cover, thereby realizing rapid annealing.

[0064] Based on the above overall introduction, an exemplary structure of a bell-type bright annealing furnace for improving annealing efficiency in this embodiment is as follows: Figure 2 and Figure 4 As shown, at least two groups of furnace table 2 and inner cover 3 are arranged on base 1, and a ring seat 8 for mounting inner cover 3 is arranged at each through hole, and a locking member 9 for locking inner cover 3 is rotatably arranged on the side of ring seat 8.

[0065] Specifically, in the present embodiment, four furnace tables 2 and four inner covers 3 are respectively provided, and two coils are placed on each furnace table 2. As the number of inner covers 3 increases, the space of each inner cover 3 can be appropriately reduced to ensure that the temperature uniformity is improved and the annealing cycle is shortened. By loading two coils, it can also ensure that the load on the furnace table 2 is light, it is not easy to cause the edge sticking phenomenon, and it is convenient to load. The inner cover 3 is inserted in the ring seat 8, which is convenient for installation and improves the installation efficiency. The locking member 9 includes a bolt 901 rotatably connected to the ring seat 8, a U-shaped groove 902 provided on the inner cover 3 for the bolt 901 to enter, and a nut 903 screwed on the bolt 901 to tighten the inner cover 3 to the ring seat 8. The nut 903 is located at the upper part of the U-shaped groove 902. By rotating the nut 903, the inner cover 3 is pressed down to abut against the ring seat 8, thereby achieving locking.

[0066] As a preferred example, Figure 3 As shown, the outlet of the cooling fan 10 of this embodiment is equipped with a pipe 11 connected to the cooling hood, a spraying device 5 for controlling water flow is arranged between the pipe 11 and the cooling hood, the spraying device 5 is respectively connected to the cooling hood and the pipe 11, and an adjusting device 6 for adjusting the flow rate of the air flow is arranged on the spraying device 5. Specifically, the cooling fan 10 is located on the side wall of the cooling hood, and a cooling fan 10 is arranged at each inner hood 3. The spraying device 5 is externally connected to a water supply device, and the spraying device 5 controls the nozzle 7 to spray. When the airflow in the pipe 11 flows into the spraying device 5, the airflow can drive the mist to circulate in the cooling hood, thereby accelerating the cooling efficiency and cooling uniformity. The adjusting device 6 is located in the cooling hood. When the airflow passes through the adjusting device 6, the flow rate and range of the airflow can be changed, thereby improving the flexibility of the airflow. The spraying device 5 and the adjusting device 6 can be arranged in multiple groups on the cooling hood to further accelerate the efficiency of the airflow and mist circulation in the cooling hood.

[0067] As a preferred embodiment, Figure 5 As shown, the spraying device 5 in this embodiment includes a circulation bin 501 connected to the connecting pipe 11, and a lifting mechanism 502 for controlling the opening of the nozzle 7. The regulating device 6 and the nozzle 7 are respectively installed at the bottom of the circulation bin 501, and the nozzle 7 is located in the middle of the regulating device 6. The airflow in the connecting pipe 11 passes through the circulation bin 501 and then enters the regulating device 6 and the lifting mechanism 502. The mist sprayed by the nozzle 7 follows the airflow in the regulating device 6 and enters the cooling bin.

[0068] It should be noted that an opening is provided on the cooling hood for installing the circulation bin 501, and the circulation bin 501 is inserted in the opening to ensure that the airflow blown out by the cooling fan 10 can enter the cooling hood. The adjustment device 6 and the nozzle 7 are located in the circulation bin 501. When the airflow passes through, it will drive the mist into the cooling hood. The lifting mechanism 502 is installed inside the circulation bin 501. The lifting mechanism 502 can control the opening and closing of the nozzle 7. The lifting mechanism 502 is externally connected to the water supply equipment. When the water supply pressure and the airflow pressure reach a certain level, the lifting mechanism 502 controls the nozzle 7 to open the spray, ensuring that the airflow is cooled first, and then the spray cooling is performed after reaching a certain temperature.

[0069] As a preferred example, Figure 6 and Figure 7 As shown, the circulation bin 501 of this embodiment is provided with a plurality of inclined plates 503 on the bottom circumference, a mounting plate 504 is fixedly provided in the middle of the plurality of inclined plates 503, the air flow is discharged from the gap between two adjacent inclined plates 503, and the nozzle 7 is fixedly provided at the bottom of the mounting plate 504; the lifting mechanism 502 includes a water pipe 5021 connected to the nozzle 7, a valve needle 5022 which is lifted and lowered inside the water pipe 5021, and a cylinder body 5023 located at the top of the water pipe 5021, a large piston 5024 which is lifted and lowered in the circulation bin 501 is fixedly provided on the valve needle 5022, and a small piston 5025 which is lifted and lowered in the cylinder body 5023 is fixedly provided at the bottom of the large piston 5024.

[0070] Specifically, the arrangement of multiple inclined plates 503 enables the airflow to rotate when passing through the gap between the two inclined plates 503, thereby increasing the speed of the airflow and accelerating the circulation of the airflow in the cooling hood. The nozzle 7 is located at the bottom of the mounting plate 504, and the water pipe 5021 is located at the top of the mounting plate 504. The water pipe 5021 and the nozzle 7 are connected to ensure that the valve needle 5022 can rise and fall in the water pipe 5021 and the nozzle 7, so that the valve needle 5022 can block and open the nozzle 7. The water pipe 5021 is connected to a water supply device. 021 is a right-angled shape. Such a setting ensures that the cylinder body 5023 can be fixedly installed on the top of the water pipe 5021. When the airflow enters the circulation chamber 501, the airflow goes downward and is discharged from the circulation chamber 501 through the inclined plate 503, and the airflow goes upward and pushes the large piston 5024 to rise. When the large piston 5024 moves, it drives the small piston 5025 to rise in the cylinder body 5023. The large piston 5024 also drives the valve needle 5022 and the nozzle 7 to separate. After separation, the nozzle 7 and the water pipe 5021 are connected, and the water flow can be sprayed out from the nozzle 7.

[0071] As a preferred example, Figure 7As shown, in this embodiment, a secondary pipe 5026 is connected between the water pipe 5021 and the cylinder body 5023. The water flow in the water pipe 5021 enters the cylinder body 5023 through the secondary pipe 5026 to lift the small piston 5025. A downward pressing mechanism 505 is provided on the top of the circulation chamber 501. The downward pressing mechanism 505 drives the valve needle 5022. When the pressure of the lifting mechanism 502 is insufficient, the valve needle 5022 and the nozzle 7 are in a blocked state. Specifically, the airflow can lift the large piston 5024, and the water flow can lift the small piston 5025. The water flow enters the secondary pipe 5026 through the water pipe 5021, and the water flow of the secondary pipe 5026 enters the cylinder body 5023. The water flow pressure in the cylinder body 5023 increases, thereby lifting the small piston 5025. The lifting force of the two is greater than the pressure of the downward pressing mechanism 505, thereby lifting the valve needle 5022.

[0072] As a preferred embodiment, Figure 8 As shown, in this embodiment, the pressing mechanism 505 includes a buckle cover 5051 fixedly arranged on the top of the circulation chamber 501, a first spring 5052 supported between the buckle cover 5051 and the large piston 5024, and a push cover 5053 lifted and arranged on the buckle cover 5051 to support the valve needle 5022, a second spring 5054 is arranged between the push cover 5053 and the valve needle 5022, a threaded rod 5055 is fixedly arranged on the buckle cover 5051 for the push cover 5053 to slide, the buckle cover 5051 is passed through the screw rod, and two nuts 5056 are threadedly connected to the threaded rod 5055, and the two nuts 5056 fix the buckle cover 5051 at a preset position.

[0073] It should be noted that the valve needle 5022 passes through the buckle cover 5051 and slides on the buckle cover 5051. When the valve needle 5022 is lifted, it drives the large piston 5024 to move. At this time, the first spring 5052 is compressed, and the second spring 5054 is also compressed. Therefore, the lifting force of the airflow and water flow must be greater than the elastic force of the first spring 5052 and the second spring 5054. The setting of the push cover 5053 can adjust the elastic force of the second spring 5054. Since the push cover 5053 is buckled on the buckle cover 5051 and can be 055, two nuts 5056 can fix the push cover 5053 at the position after moving, the nuts 5056 can adjust the position of the push cover 5053 when moving on the threaded rod 5055, such an arrangement can flexibly adjust the downward pressure of the second spring 5054, at least two threaded rods 5055 can be relatively arranged, and the push cover 5053 is provided with a convex plate that slides on the threaded rod 5055, and the two nuts 5056 clamp the convex plate to ensure that the push cover 5053 is fixed at the adjusted position, that is, the preset position.

[0074] As a preferred embodiment, Fig. 9 and Fig.11As shown, in this embodiment, the adjustment device 6 includes a fixed ring 601 fixedly arranged at the bottom of the circulation bin 501, an adjustment plate 602 rotatably arranged on the fixed ring 601, and a ring sleeve 603 for controlling the rotation of the adjustment plate 602. A plurality of adjustment plates 602 are arranged along the circular axis of the fixed ring 601, and the plurality of adjustment plates 602 are staggered and fitted to form a polygonal circle. It should be noted that the fixed ring 601 is fixed at the bottom of the circulation bin 501 with the central axis of the circulation bin 501 as the reference. After the airflow is discharged from the inclined plate 503, it enters the circle surrounded by multiple adjustment plates 602. The middle part of the adjustment plate 602 is bent into a certain angle, which is less than 180° and greater than 90°. Such a setting can achieve staggered fitting of multiple adjustment plates 602. Since the rotation of multiple adjustment plates 602 can adjust the size of the circle diameter, when the diameter becomes smaller, the airflow is compressed and the flow rate becomes faster, and when the diameter becomes larger, the airflow is released and the flow rate becomes slower. The nozzle 7 is located in the middle of the fixed ring 601. When the airflow is discharged, it will drive the mist to flow, thereby cooling the cooling hood more flexibly.

[0075] As a preferred example, Fig. 9 and Fig.10 As shown, the side wall of the ring sleeve 603 of this embodiment is provided with an arc groove 604 in the horizontal direction, and the adjusting plate 602 is provided with a linkage ball 605 that moves following the arc groove 604, and the linkage ball 605 drives the adjusting plate 602 to rotate, and the fixing ring 601 is provided with a gear ring 606, and the ring sleeve 603 is provided with a gear 607 that meshes with the gear ring 606, and the ring sleeve 603 is also provided with a motor 608 that drives the gear 607. Specifically, the motor 608 drives the gear 607 to rotate, and the gear 607 and the gear ring 606 are meshed, that is, the gear 607 rotates around the gear ring 606, thereby driving the ring sleeve 603 to rotate. Due to the setting of the arc groove 604, when the ring sleeve 603 rotates, the linkage ball 605 moves following the trajectory of the arc groove 604, thereby driving the adjusting plate 602 to rotate, and such a setting enables the circle composed of multiple adjusting plates 602 to adjust the size.

[0076] The hood-type bright annealing furnace for improving annealing efficiency in this embodiment realizes rapid heating and cooling and improves annealing efficiency by setting the furnace table 2 and the inner cover 3, and alternately installing the heating cover and the cooling cover of the outer cover 4; the inner cover 3 is filled with protective gas by the circulating fan, which effectively avoids oxidation of the material during the annealing process and ensures product quality; by increasing the number of groups of the furnace table 2 and the inner cover 3, and setting the ring seat 8 and the locking member 9, the installation efficiency and stability of the inner cover 3 are improved, and the annealing process is further optimized.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bell-type bright annealing furnace for improving annealing efficiency, characterized in that: It comprises a base (1), a furnace table (2), an inner cover (3), and an outer cover (4); The furnace table (2) is fixedly mounted on the base (1); a through hole for mounting the furnace table (2) is provided on the base (1); and the coiled material is placed on the top of the furnace table (2); The inner cover (3) is arranged outside the coil and installed on the furnace table (2), and the furnace table (2) heats the outside of the inner cover (3); The outer cover (4) is arranged outside the inner cover (3) and is installed on the base (1); A circulating fan for filling the inner cover (3) with protective gas is arranged at the through hole on the base (1); The outer cover (4) is divided into a heating cover and a cooling cover, the heating cover and the cooling cover are alternately mounted on the base (1), the cooling cover is provided with a cooling fan (10) for cooling the interior, and the cooling cover is provided with a nozzle (7) for cooling the interior; The air outlet of the cooling fan (10) is provided with a pipe (11) connected to a cooling hood, a spray device (5) for controlling water flow is provided between the pipe (11) and the cooling hood, the spray device (5) is respectively connected to the cooling hood and the pipe (11), and a regulating device (6) for regulating the air flow velocity is provided on the spray device (5); The spraying device (5) comprises a circulation chamber (501) connected to the connecting pipe (11) and a lifting mechanism (502) for controlling the opening of the nozzle (7); the regulating device (6) and the nozzle (7) are respectively installed at the bottom of the circulation chamber (501); the nozzle (7) is located in the middle of the regulating device (6); the airflow in the connecting pipe (11) passes through the circulation chamber (501) and enters the regulating device (6) and the lifting mechanism (502); the mist sprayed by the nozzle (7) follows the airflow in the regulating device (6) and enters the cooling chamber.

2. The bell-type bright annealing furnace according to claim 1, characterized in that: The furnace table (2) and the inner cover (3) are arranged in at least two groups on the base (1), and each through hole is provided with a ring seat (8) for mounting the inner cover (3), and a locking piece (9) for locking the inner cover (3) is rotatably arranged on the side of the ring seat (8).

3. The bell-type bright annealing furnace according to claim 1, characterized in that: The circulation bin (501) is provided with a plurality of inclined plates (503) on the circumference of the bottom, a mounting plate (504) is fixedly provided in the middle of the plurality of inclined plates (503), the air flow is discharged from the gap between two adjacent inclined plates (503), and the nozzle (7) is fixedly provided at the bottom of the mounting plate (504).

4. The bell-type bright annealing furnace according to claim 1, characterized in that: The lifting mechanism (502) comprises a water pipe (5021) connected to the nozzle (7), a valve needle (5022) arranged to be lifted inside the water pipe (5021), and a cylinder body (5023) located at the top of the water pipe (5021); a large piston (5024) is fixedly arranged on the valve needle (5022) and is lifted and lowered in the circulation chamber (501); and a small piston (5025) is fixedly arranged at the bottom of the large piston (5024) and is lifted and lowered in the cylinder body (5023).

5. The bell-type bright annealing furnace according to claim 4, characterized in that: A secondary pipe (5026) is connected between the water pipe (5021) and the cylinder body (5023), and the water flow in the water pipe (5021) enters the cylinder body (5023) through the secondary pipe (5026) to lift the small piston (5025).

6. The bell-type bright annealing furnace according to claim 4, characterized in that: A pressing mechanism (505) is provided on the top of the circulation chamber (501). When the pressure of the lifting mechanism (502) is insufficient, the pressing mechanism (505) drives the valve needle (5022) to block the spray port of the nozzle (7).

7. The bell-type bright annealing furnace according to claim 6, characterized in that: The pressing mechanism (505) comprises a buckle cover (5051) fixedly arranged on the top of the circulation chamber (501), a first spring (5052) supported between the buckle cover (5051) and the large piston (5024), and a push cover (5053) lifted and arranged on the buckle cover (5051) to support the valve needle (5022), and a second spring (5054) is arranged between the push cover (5053) and the valve needle (5022); The buckle cover (5051) is fixedly provided with a threaded rod (5055) for the push cover (5053) to slide, the buckle cover (5051) is inserted into the screw rod, and the threaded rod (5055) is threadedly connected with two nuts (5056), and the two nuts (5056) fix the buckle cover (5051) at a preset position.

8. The bell-type bright annealing furnace according to any one of claims 1 to 7, characterized in that: The regulating device (6) comprises a fixed ring (601) fixedly arranged at the bottom of the circulation bin (501), an regulating plate (602) rotatably arranged on the fixed ring (601), and a ring sleeve (603) for controlling the rotation of the regulating plate (602); a plurality of regulating plates (602) are arranged along the circular axis of the fixed ring (601); and the plurality of regulating plates (602) are staggered and fitted to form a polygonal circle.

9. The bell-type bright annealing furnace according to claim 8, characterized in that: The side wall of the ring sleeve (603) is laterally provided with an arc groove (604); the adjusting plate (602) is provided with a linkage ball (605) which moves following the arc groove (604); the linkage ball (605) drives the adjusting plate (602) to rotate; the fixing ring (601) is provided with a gear ring (606); the ring sleeve (603) is provided with a gear (607) which meshes with the gear ring (606); and the ring sleeve (603) is also provided with a motor (608) which drives the gear (607).

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