Adjustable multi-section temperature control annealing furnace for continuous annealing of copper strip

Abstract

The utility model relates to the technical field of copper strip processing equipment, and discloses an adjustable multi-section temperature control annealing furnace for continuous annealing of a copper strip, which comprises a workbench. According to the cooling device, the buffer cavities are arranged between every two of the preheating cavity, the heating cavity, the slow cooling cavity and the rapid cooling cavity, the negative pressure fans are installed at the tops of the buffer cavities, the negative pressure fans are used for forcibly pumping and discharging air flow in the buffer cavities, heat transfer between the adjacent cavities is effectively blocked, the air flow is discharged through the negative pressure fans, heat diffusion between the cavities is reduced, and the cooling efficiency is improved. The slow cooling cavity and the rapid cooling cavity are prevented from being interfered by waste heat of the heating cavity, so that the temperature of each cavity is closer to a set value, the temperature control precision and stability in the copper strip annealing process are improved, the energy consumption is reduced, the product annealing quality consistency is ensured, heat radiation is further effectively blocked by a heat insulation curtain, and heat transferred between adjacent cavities in a radiation mode is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of copper strip processing equipment, and in particular to an adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strip. Background Technology

[0002] In the continuous annealing process of copper strip, the multi-stage temperature-controlled annealing furnace achieves precise temperature control of the copper strip by dividing it into different functional areas such as preheating chamber, heating chamber, and slow cooling zone.

[0003] Significant temperature gradients exist between different temperature zones (e.g., the heating chamber temperature can reach 600-800℃, while the preheating chamber temperature is only 200-300℃). Heat is transferred between adjacent temperature zones through heat conduction, heat convection, and heat radiation, resulting in decreased temperature control accuracy, poor stability of the copper strip annealing process, and low yield. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides an adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strips.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an adjustable multi-segment temperature-controlled annealing furnace for continuous annealing of copper strip, including a workbench, an annealing box welded to the upper surface of the workbench, and a conveyor belt conveying mechanism inside the annealing box. The annealing box has a preheating chamber, a heating chamber, a slow cooling chamber, a buffer chamber, and a fast cooling chamber. Insulation curtains are provided on both sides of the preheating chamber, the heating chamber, the slow cooling chamber, and the fast cooling chamber. A heating chamber is provided on one side of the preheating chamber, a slow cooling chamber is provided on one side of the heating chamber, and a fast cooling chamber is provided on one side of the slow cooling chamber. Buffer chambers are provided between each pair of the preheating chamber, the heating chamber, the slow cooling chamber, and the fast cooling chamber. A negative pressure fan is embedded through the upper surface of the buffer chamber.

[0006] By adopting the above technical solution, buffer chambers are set between each pair of the preheating chamber, heating chamber, slow cooling chamber, and fast cooling chamber. A negative pressure fan is installed on the top of the buffer chamber. The negative pressure fan forces the airflow in the buffer chamber, effectively blocking the heat transfer between adjacent chambers. The airflow is discharged through the negative pressure fan, reducing the heat diffusion between the chambers and preventing the slow cooling chamber and fast cooling chamber from being interfered with by the residual heat of the heating chamber. This makes the temperature of each chamber closer to the set value, improving the accuracy and stability of temperature control during copper strip annealing, reducing energy consumption, and ensuring the consistency of product annealing quality. The heat insulation curtain further effectively blocks heat radiation, reducing the heat transferred between adjacent chambers through radiation.

[0007] Furthermore, maintenance chambers are welded to the upper surface of the annealing chamber, respectively above the preheating chamber, heating chamber, slow cooling chamber, and rapid cooling chamber. Maintenance drawers are slidably connected to the front of each maintenance chamber. A high-temperature fan is bolted into the maintenance drawer in the preheating chamber, and an electric heating element is installed below the high-temperature fan. An electromagnetic induction coil is bolted into the maintenance drawer in the heating chamber. A first cooling fan is bolted into the maintenance drawer in the slow cooling chamber, and a filter is installed at the air inlet of the first cooling fan. The upper surface of the maintenance compartment has a through hole for use with the first cooling fan. A second cooling fan is installed in the maintenance drawer of the rapid cooling cavity, and a filter screen is installed at the air inlet end of the second cooling fan. The upper surface of the maintenance compartment has a through hole for use with the second cooling fan. A water spray pipe is provided on one side of the second cooling fan, and an atomizing nozzle is installed on the lower surface of the water spray pipe. The water spray pipe is fixed to the inner side of the maintenance drawer by a mounting bracket. The end of the water spray pipe is connected to an external hose through a flange, and the external hose is sealed to the maintenance compartment.

[0008] By adopting the above technical solution, maintenance compartments and maintenance drawers are set up on each cavity of the annealing box, and components such as high-temperature resistant fans, electric heating tubes, electromagnetic induction coils, and cooling fans are installed in the maintenance drawers. This design makes it easy for staff to quickly disassemble the maintenance drawers to maintain, replace or debug the internal components, reducing equipment downtime for maintenance. At the same time, the functional components are arranged in separate areas, making the equipment structure clearer, reducing maintenance difficulty and extending the service life of the equipment.

[0009] Furthermore, the heat insulation curtain is made of high-temperature resistant silicon fiber.

[0010] By adopting the above technical solution, it has good high temperature resistance and heat insulation effect, which can effectively block heat radiation and reduce the heat transferred between adjacent cavities through radiation.

[0011] Furthermore, a supplementary heating lamp is provided in the buffer cavity between the preheating cavity and the heating cavity.

[0012] By adopting the above technical solution, when the negative pressure fan causes the copper strip to lose heat and its temperature to drop, the heating lamp can promptly heat the copper strip to compensate for the temperature drop, ensuring that the temperature of the copper strip meets the process requirements when it enters the heating chamber.

[0013] Furthermore, the lower surface of the workbench is fixed with legs by bolts, and the lower surface of the legs is adhered with anti-slip pads.

[0014] By adopting the above technical solutions, the support legs can raise the workbench and annealing chamber, which facilitates ventilation and heat dissipation at the bottom of the equipment and the layout of pipelines. At the same time, it enhances the overall stability of the equipment and prevents the annealing furnace from shifting due to vibration during operation. The anti-slip pads increase the friction between the equipment and the ground, further improving the stability of the equipment placement, ensuring the safe operation of the equipment, and reducing the interference of equipment shaking on the copper strip transmission and annealing process.

[0015] Furthermore, an integrated controller is bolted to the outer side of the annealing chamber.

[0016] By adopting the above technical solution, the integrated controller can centrally control and adjust the parameters of various components of the annealing furnace (such as negative pressure fans, high-temperature resistant fans, electric heating tubes, cooling fans, water spray pipes, etc.). Operators can set parameters such as temperature, time, and wind speed for preheating, heating, slow cooling, and rapid cooling stages through the integrated controller to achieve automated operation.

[0017] In summary, this utility model has the following beneficial effects:

[0018] 1. In this application, buffer chambers are set between each pair of the preheating chamber, heating chamber, slow cooling chamber, and fast cooling chamber, and negative pressure fans are installed on the top of the buffer chambers. The negative pressure fans forcefully exhaust the airflow in the buffer chambers, effectively blocking the heat transfer between adjacent chambers. The airflow is discharged through the negative pressure fans, reducing the diffusion of heat between each chamber and preventing the slow cooling chamber and fast cooling chamber from being interfered with by the residual heat of the heating chamber. This makes the temperature of each chamber closer to the set value, improving the accuracy and stability of temperature control during the copper strip annealing process, reducing energy consumption, and ensuring the consistency of product annealing quality. The heat insulation curtain further effectively blocks heat radiation, reducing the heat transferred between adjacent chambers by radiation.

[0019] 2. In this application, maintenance compartments and maintenance drawers are set on each cavity of the annealing box, and components such as high-temperature resistant fans, electric heating tubes, electromagnetic induction coils, and cooling fans are installed in the maintenance drawers. This design makes it easy for staff to quickly disassemble the maintenance drawers to maintain, replace or debug the internal components, reduce equipment downtime for maintenance, and at the same time, the functional components are arranged in separate areas, making the equipment structure clearer, reducing maintenance difficulty and extending the service life of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the annealing box and its connection structure according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of a high-temperature resistant fan and its connection structure according to an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the electromagnetic induction coil and its connection structure according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the first cooling fan and its connection structure according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the second cooling fan and its connection structure according to an embodiment of the present invention.

[0026] In the diagram: 1. Workbench; 2. Support leg; 3. Annealing chamber; 4. Preheating chamber; 5. Heating chamber; 6. Slow cooling chamber; 7. Rapid cooling chamber; 8. Buffer chamber; 9. Heat insulation curtain; 10. Negative pressure fan; 11. Heat lamp; 12. Inspection chamber; 13. Inspection drawer; 14. High temperature resistant fan; 15. Electric heating element; 16. Electromagnetic induction coil; 17. First cooling fan; 18. Second cooling fan; 19. Water spray pipe; 20. Atomizing nozzle; 21. Integrated controller; 22. Conveyor belt conveyor mechanism. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] like Figure 1-6 As shown in the embodiment of this application, an adjustable multi-segment temperature-controlled annealing furnace for continuous annealing of copper strip is disclosed. It includes a workbench 1, an annealing box 3 welded to the upper surface of the workbench 1, and a conveyor belt conveying mechanism 22 is provided inside the annealing box 3. The annealing box 3 has a preheating chamber 4, a heating chamber 5, a slow cooling chamber 6, a buffer chamber 8 and a fast cooling chamber 7. Heat insulation curtains 9 are provided on both sides of the preheating chamber 4, the heating chamber 5, the slow cooling chamber 6 and the fast cooling chamber 7. A heating chamber 5 is provided on one side of the preheating chamber 4, a slow cooling chamber 6 is provided on one side of the heating chamber 5, and a fast cooling chamber 7 is provided on one side of the slow cooling chamber 6. A buffer chamber 8 is provided between each pair of the preheating chamber 4, the heating chamber 5, the slow cooling chamber 6 and the fast cooling chamber 7. A negative pressure fan 10 is embedded through the upper surface of the buffer chamber 8. The heat insulation curtain 9 is made of high-temperature resistant silicon fiber curtain.

[0029] Workbench 1 and Annealing Chamber 3: The upper surface of workbench 1 is fixed to annealing chamber 3 by welding. The welded connection is characterized by high strength and stability, capable of withstanding the high temperature inside annealing chamber 3, vibrations generated by complex equipment operation, and tension during copper strip conveying. As the basic load-bearing component, workbench 1 provides stable support for annealing chamber 3, ensuring that all cavities and equipment inside annealing chamber 3 remain horizontal, guaranteeing smooth copper strip conveying during annealing, and preventing problems such as strip deviation and uneven heating caused by equipment shaking. During installation, workbench 1 is assembled and leveled first, then annealing chamber 3 is precisely positioned and welded, ensuring that the center lines of both coincide for a stable connection.

[0030] The annealing chamber 3 contains an internal cavity and a heat insulation curtain 9. The annealing chamber 3 has a preheating cavity 4, a heating cavity 5, a slow cooling cavity 6, a buffer cavity 8, and a rapid cooling cavity 7. These cavities are separated by the buffer cavity 8. Heat insulation curtains 9 are installed on both sides of the preheating cavity 4, heating cavity 5, slow cooling cavity 6, and rapid cooling cavity 7. The heat insulation curtains 9 are made of high-temperature resistant silicon fiber and are fixed to the cavity edges using high-temperature adhesive or special clamps, forming a flexible heat insulation barrier. The heat insulation curtains 9 effectively block heat radiation transfer between adjacent cavities, reducing heat diffusion from the high-temperature cavity to the low-temperature cavity via radiation. Simultaneously, their flexible material tightly fits the cavity, preventing hot air leakage through gaps. Combined with the buffer cavity 8 and the negative pressure fan 10, this forms a multi-layered heat insulation structure, further improving the independence and stability of the temperature in each cavity and ensuring precise temperature control of the copper strip at different process stages.

[0031] Buffer chamber 8 and negative pressure fan 10: Buffer chamber 8 is located between each pair of preheating chamber 4, heating chamber 5, slow cooling chamber 6, and fast cooling chamber 7. Negative pressure fan 10 is embedded in the upper surface of buffer chamber 8. The negative pressure fan 10 is connected to the pre-drilled mounting holes on the upper surface of buffer chamber 8 via flanges, and the gaps are filled with high-temperature resistant sealant to ensure a tight seal and prevent leakage of hot airflow within buffer chamber 8. During operation, the negative pressure fan 10 creates a negative pressure environment within buffer chamber 8, forcibly extracting the hot airflow and effectively blocking the heat convection transfer path between adjacent chambers, reducing the rate of heat diffusion from high-temperature chambers to low-temperature chambers. For example, in buffer chamber 8 between heating chamber 5 and preheating chamber 4, the negative pressure fan 10 promptly extracts the hot airflow diffused from heating chamber 5, preventing excessive heat transfer in preheating chamber 4 and ensuring that the temperatures of preheating chamber 4 and heating chamber 5 meet their respective process requirements, thus improving the accuracy and stability of copper strip annealing temperature control.

[0032] An inspection chamber 12 is welded to the upper surface of the annealing chamber 3, above the preheating chamber 4, heating chamber 5, slow cooling chamber 6, and fast cooling chamber 7 respectively. An inspection drawer 13 is slidably connected to the front of the inspection chamber 12. A high-temperature fan 14 is bolted to the inspection drawer 13 in the preheating chamber 4, and an electric heating tube 15 is installed below the high-temperature fan 14. An electromagnetic induction coil 16 is bolted to the inspection drawer 13 in the heating chamber 5. A first cooling fan 17 is bolted to the inspection drawer 13 in the slow cooling chamber 6, and a filter is installed at the air inlet of the first cooling fan 17. The upper surface of the compartment 12 has a through hole for use with the first cooling fan 17. The maintenance drawer 13 at the fast cooling cavity 7 is equipped with a second cooling fan 18, and the air inlet end of the second cooling fan 18 is equipped with a filter screen. The upper surface of the maintenance compartment 12 has a through hole for use with the second cooling fan 18. A water spray pipe 19 is provided on one side of the second cooling fan 18, and an atomizing nozzle 20 is installed on the lower surface of the water spray pipe 19. The water spray pipe 19 is fixed to the inner side of the maintenance drawer 13 by a mounting bracket. The end of the water spray pipe 19 is connected to an external hose through a flange, and the external hose is sealed to the maintenance compartment 12.

[0033] Maintenance compartments 12 and maintenance drawers 13: Maintenance compartments 12 are welded to the upper surface of the annealing chamber 3 above the preheating chamber 4, heating chamber 5, slow cooling chamber 6, and rapid cooling chamber 7. Slide rails are provided on the front of the maintenance compartments 12, and maintenance drawers 13 are slidably connected to the maintenance compartments 12 via these rails. Magnetic locks are provided between the maintenance drawers 13 and the maintenance compartments 12 to ensure a tight seal. This connection method allows workers to quickly pull out or push in the maintenance drawers 13, enabling maintenance, replacement, and debugging of the equipment inside. The maintenance compartments 12 provide protection for the internal equipment, preventing dust and debris from entering and affecting normal equipment operation. The maintenance drawers 13 serve as the equipment mounting carrier, allowing functional components such as the high-temperature fan 14, electric heating element 15, and electromagnetic induction coil 16 to be installed in separate sections, making the equipment structure clearer, reducing maintenance difficulty, minimizing downtime for maintenance, and improving equipment operating efficiency and service life. During installation, first weld and fix the maintenance compartment 12 to the corresponding position of the annealing box 3, then install the slide rail, and finally precisely align and adjust the maintenance drawer 13 with the slide rail to ensure smooth sliding.

[0034] Internal equipment and maintenance drawer 13 of each cavity: Inside the maintenance drawer 13 in the preheating cavity 4, a high-temperature fan 14 is fixed to a pre-set mounting hole at the bottom of the drawer using bolts. An electric heating element 15 is mounted below the high-temperature fan 14 via a bracket, which is bolted to the maintenance drawer 13 to ensure the stable position of the electric heating element 15. When the high-temperature fan 14 is running, it blows the heat generated by the electric heating element 15 evenly onto the copper strip via forced convection, thus achieving the heating function of the copper strip in the preheating cavity 4. Inside the maintenance drawer 13 in the heating cavity 5, an electromagnetic induction coil 16 is bolted to a specific bracket inside the drawer. The bracket is designed according to the shape and size of the electromagnetic induction coil 16 to ensure precise coil positioning and generate a uniform alternating magnetic field, enabling the copper strip to achieve rapid and efficient heating using the principle of electromagnetic induction when passing through the heating cavity 5. Inside the maintenance drawer 13 in the slow cooling cavity 6, a first cooling fan 17 is bolted to the inner side of the drawer. A filter is installed at the air inlet, and the filter is connected to the first cooling fan 17 via clips for easy disassembly and cleaning. When the first cooling fan 17 is running, it draws in cool outside air, filters out impurities through a filter screen, and then blows it onto the copper strip, achieving slow cooling of the copper strip. The filter screen prevents dust, copper shavings, etc., from entering the fan and affecting its normal operation. Inside the maintenance drawer 13 at the rapid cooling chamber 7, the second cooling fan 18 is installed in a similar manner to the first cooling fan 17. The water spray pipe 19 is fixed to the inner side of the maintenance drawer 13 by a mounting bracket, which is bolted to the maintenance drawer 13. An atomizing nozzle 20 is installed on the lower surface of the water spray pipe 19, and the end of the water spray pipe 19 is connected to an external hose through a flange. The external hose passes through the maintenance compartment 12 and is sealed to the maintenance compartment 12 with a sealing joint to prevent water leakage. The second cooling fan 18, in conjunction with the water spray pipe 19 and the atomizing nozzle 20, achieves rapid cooling of the copper strip by spraying atomized water and forced air cooling. The installation and connection method of the internal equipment of each cavity and the maintenance drawer 13 makes the equipment layout compact, the installation firm, and easy to maintain and replace. The equipment works together to ensure that the copper strip receives accurate temperature treatment at different annealing stages.

[0035] A supplementary heating lamp 11 is installed in the buffer cavity 8 between the preheating cavity 4 and the heating cavity 5.

[0036] The supplementary heating lamp 11 is installed in the buffer zone between the preheating zone and the heating zone via a bracket. The bracket is fixed to the inner wall of the buffer chamber 8 with bolts to ensure the stable position of the supplementary heating lamp 11. The supplementary heating lamp 11 is connected to the integrated controller 21 via wires. The integrated controller 21 monitors the copper strip temperature in real time. When the negative pressure fan 10 draws air, causing heat loss and a drop in temperature in the copper strip, the integrated controller 21 controls the supplementary heating lamp 11 to turn on, providing heating compensation to the copper strip and ensuring that the temperature of the copper strip meets the process requirements when it enters the heating zone. By adjusting the power of the supplementary heating lamp 11, precise temperature control can be achieved, avoiding the impact of copper strip temperature fluctuations on the annealing quality and ensuring the continuity and stability of the annealing process.

[0037] The lower surface of the workbench 1 is fixed with support legs 2 by bolts, and the lower surface of the support legs 2 is covered with anti-slip pads.

[0038] Workbench 1 and Support Leg 2: The lower surface of workbench 1 is bolted to support leg 2 in pre-set mounting holes. This connection method facilitates disassembly and installation, and makes equipment transportation and debugging convenient. Anti-slip pads are adhered to the lower surface of support leg 2, and these pads are tightly bonded to the lower surface of support leg 2 with strong adhesive, increasing the friction between the equipment and the ground and preventing displacement of the annealing furnace due to vibration during operation, thus ensuring safe operation. Support leg 2 raises workbench 1 and annealing chamber 3, facilitating ventilation and heat dissipation at the bottom of the equipment and piping layout, while also enhancing the overall stability of the equipment and reducing interference from equipment shaking on copper strip transmission and the annealing process.

[0039] An integrated controller 21 is bolted to the outer side of the annealing chamber 3.

[0040] Integrated Controller 21: The integrated controller 21 is bolted to the outer side of the annealing chamber 3, with a convenient installation location for operator observation and operation. The integrated controller 21 is connected via wires to internal components of the annealing chamber 3, including the negative pressure fan 10, high-temperature fan 14, electric heating element 15, electromagnetic induction coil 16, first cooling fan 17, second cooling fan 18, and water spray pipe 19, enabling centralized control and parameter adjustment of these devices. Operators can set parameters such as temperature, time, and airflow for preheating, heating, slow cooling, and rapid cooling stages using the integrated controller 21. The integrated controller 21 controls the coordinated operation of each device according to the preset parameters, achieving automated operation. Simultaneously, the integrated controller 21 monitors real-time data such as the temperature of each chamber and the operating status of the equipment, promptly alarming and adjusting operating parameters when abnormalities occur, improving the ease of operation, intelligence, and production efficiency of the equipment, while reducing manual operation costs and error rates.

[0041] The operating principle of the adjustable multi-segment temperature-controlled annealing furnace for continuous annealing of copper strip in this embodiment is as follows: The copper strip is fed into the annealing chamber 3 via a conveying mechanism, and passes sequentially through the preheating chamber 4, heating chamber 5, slow cooling chamber 6, and fast cooling chamber 7. The temperature control of each chamber works in coordination with the equipment. The integrated controller 21 coordinates the overall process to ensure the stable progress of the annealing process. The high-temperature fan 14 in the preheating chamber 4 forces the heat generated by the electric heating tube 15 to the copper strip through convection. The integrated controller 21 adjusts the power of the electric heating tube 15 according to the real-time temperature of the copper strip to precisely control the preheating temperature, so that the copper strip slowly heats up to a suitable range for deep annealing in the heating chamber 5. The electromagnetic induction coil 16 in the heating chamber 5 generates an alternating magnetic field, which enables the copper strip to be heated quickly and efficiently to reach the high temperature required for annealing, change the internal structure, and eliminate stress. The first cooling fan 17 in the slow cooling chamber 6 draws in cold air filtered by a filter and blows it onto the copper strip, so that the copper strip cools down slowly. The integrated controller 21 adjusts the fan speed according to the preset slow cooling rate to control the cooling speed and prevent internal stress or structural defects in the copper strip due to rapid cooling, ensuring stable performance after annealing. The second cooling fan 18 in the rapid cooling chamber 7 works with the water spray pipe 19 and atomizing nozzle 20. The atomized water rapidly vaporizes and absorbs heat upon contact with the high-temperature copper strip, and the fan accelerates airflow to enhance heat dissipation, achieving rapid cooling. The integrated controller 21 precisely controls the water spray flow, fan speed, and cooling time according to the copper strip material and process requirements to meet the rapid cooling needs of different annealing processes and ensure that the final performance of the copper strip meets the standards. In addition, the heat insulation curtain 9 is tightly attached to the edge of the chamber, and with its high-temperature resistant silicon fiber material, it effectively blocks heat radiation between the preheating chamber 4 and adjacent chambers. Simultaneously, the buffer chamber 8 and the negative pressure fan 10 work together. The negative pressure fan 10 draws out the hot airflow from the buffer chamber 8, blocking heat convection and preventing heat from the preheating chamber 4 from diffusing into the heating chamber 5, thus maintaining a stable preheating temperature. This allows the copper strip to heat up gradually according to the preset heating curve, preparing it for deep annealing. Meanwhile, the supplementary heating lamp 11, under the command of the integrated controller 21, monitors the copper strip temperature in real time. When the negative pressure suction causes the copper strip to cool down, it compensates for the heat in time, ensuring that the copper strip reaches the required temperature when entering the heating chamber 5, maintaining the continuity of the annealing process. During equipment operation, if internal components malfunction, the design advantages of the maintenance chamber 12 and maintenance drawer 13 become apparent. Workers can easily pull out the maintenance drawer 13 above the corresponding chamber via the slide rails to quickly locate and replace faulty equipment, such as the high-temperature fan 14 or electric heating tube 15 in the preheating chamber 4, or the electromagnetic induction coil 16 in the heating chamber 5. This shortens downtime for maintenance and reduces production interruption losses. At the same time, the protective function of the maintenance chamber 12 prevents dust and debris from affecting equipment performance, ensuring the long-term stable operation of the annealing furnace.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strips, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is welded with an annealing chamber (3), and the interior of the annealing chamber (3) is equipped with a conveyor belt conveyor (22). The interior of the annealing chamber (3) is provided with a preheating chamber (4), a heating chamber (5), a slow cooling chamber (6), a buffer chamber (8), and a fast cooling chamber (7). Heat insulation curtains (9) are provided on both sides of the preheating chamber (4), the heating chamber (5), the slow cooling chamber (6), and the fast cooling chamber (7). A heating chamber (5) is provided on one side of the preheating chamber (4), a slow cooling chamber (6) is provided on one side of the heating chamber (5), and a fast cooling chamber (7) is provided on one side of the slow cooling chamber (6). A buffer chamber (8) is provided between each pair of the preheating chamber (4), the heating chamber (5), the slow cooling chamber (6), and the fast cooling chamber (7). A negative pressure fan (10) is embedded through the upper surface of the buffer chamber (8).

2. The adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strip according to claim 1, characterized in that: On the upper surface of the annealing chamber (3), above the preheating chamber (4), heating chamber (5), slow cooling chamber (6), and fast cooling chamber (7), maintenance chambers (12) are welded. Maintenance drawers (13) are slidably connected to the front of the maintenance chambers (12). A high-temperature fan (14) is fixed in the maintenance drawer (13) of the preheating chamber (4) by bolts. An electric heating tube (15) is provided below the high-temperature fan (14). An electromagnetic induction coil (16) is installed in the maintenance drawer (13) of the heating chamber (5) by bolts. A first cooling fan (17) is installed in the maintenance drawer (13) of the slow cooling chamber (6) by bolts. A filter screen is installed at the air inlet end of the first cooling fan (17). The upper surface of the maintenance compartment (12) is provided with a through hole for use with the first cooling fan (17). The maintenance drawer (13) at the fast cooling cavity (7) is equipped with a second cooling fan (18), and the air inlet end of the second cooling fan (18) is equipped with a filter screen. The upper surface of the maintenance compartment (12) is provided with a through hole for use with the second cooling fan (18). A water spray pipe (19) is provided on one side of the second cooling fan (18), and an atomizing nozzle (20) is installed on the lower surface of the water spray pipe (19). The water spray pipe (19) is fixed to the inner side of the maintenance drawer (13) by a mounting bracket. The end of the water spray pipe (19) is connected to an external hose through a flange, and the external hose is sealed to the maintenance compartment (12).

3. The adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strip according to claim 2, characterized in that: The heat insulation curtain (9) is made of high-temperature resistant silicon fiber.

4. The adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strip according to claim 3, characterized in that: A supplementary heating lamp (11) is provided in the buffer cavity (8) between the preheating cavity (4) and the heating cavity (5).

5. The adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strip according to claim 4, characterized in that: The lower surface of the workbench (1) is fixed with a support leg (2) by bolts, and the lower surface of the support leg (2) is covered with an anti-slip pad.

6. The adjustable multi-stage temperature-controlled annealing furnace for continuous annealing of copper strip according to claim 5, characterized in that: An integrated controller (21) is bolted to the outer side of the annealing box (3).

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