A high-efficiency online copper pipe annealing equipment suitable for small-size copper pipes

Abstract

The utility model discloses a kind of high-efficiency online copper pipe annealing equipment suitable for small-specification copper pipe, including feeding equipment, heating equipment, heat preservation equipment, cooling equipment, discharging equipment, cooling water circulation system, oiling tank, electrical control cabinet, high-frequency power supply cabinet and operation platform, feeding equipment is used to send copper pipe into heating equipment;Heating equipment is equipped with induction coil, to heat copper pipe;Heat preservation equipment and cooling equipment are used to let the copper pipe after heating crystallization softening;Discharging equipment is used to send the copper pipe handled into discharging frame;High-frequency power supply cabinet is used to output the power required by the induction coil heating of heating equipment, and high-frequency power supply cabinet uses the power with rated frequency of 15000Hz.The high-efficiency online copper pipe annealing equipment suitable for small-specification copper pipe of the utility model, high-frequency power supply cabinet uses the power with rated frequency of 15000Hz, when processing copper pipe with diameter 9.52mm and below, compared with similar equipment, energy consumption can be greatly reduced, and up to 40% of energy consumption can be saved.

Description

Technical Field

[0001] This utility model belongs to the technical field of annealing equipment, specifically relating to a high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes. Background Technology

[0002] The heat exchanger is a core component of an air conditioning system, and its performance directly affects the overall energy efficiency of the unit. To significantly improve heat exchange efficiency, copper tubes with internal threads (i.e., "internal threaded copper tubes") are commonly used as heat exchange pipelines. The internal threads greatly increase the surface area of ​​the inner wall of the tube, thereby enhancing the heat exchange effect. However, due to the high hardness of copper itself, it must be softened before precision internal thread machining to reduce machining difficulty, improve thread quality, and protect machining tools. This softening process is called "annealing"—heating the copper tube to a specific temperature and holding it at that temperature, followed by controlled cooling, to eliminate internal stress, reduce hardness, and improve plasticity.

[0003] In large-scale production, "online basket-to-basket annealing systems" have become the industry mainstream for achieving efficient and continuous annealing. This system typically unwinds copper tubes coiled into a basket shape, allowing them to pass continuously through a processing line that includes heating, heat preservation, and cooling functions, before finally rewinding them back into a basket, thus achieving automation and continuity in production. Induction heating, due to its advantages of fast heating speed, high efficiency, ease of control, and non-contact operation, is widely integrated into this system. For example, patent application number CN201620962550.6 discloses a high-speed online copper tube annealing device. This system realizes the entire process from feeding to heating to annealing to unloading, achieving automated production without manual intervention. This allows the entire process to proceed continuously, eliminating the limitations of stationary processing on production capacity and significantly improving the production efficiency of copper tubes.

[0004] However, typical online copper tube annealing equipment usually features a 900kW solid-state induction power supply with a rated frequency of 6000Hz at the high-frequency power cabinet. This power supply typically operates between 4500-6000Hz and is highly efficient when heating copper tubes with a diameter of 12.7mm, while also exhibiting good energy efficiency when heating copper tubes with a diameter of 9.52mm. Therefore, given that 12.7mm copper tubes were the mainstream in the market a few years ago, followed by 9.52mm tubes, this type of power supply was widely used in online copper tube annealing systems. The maximum speed can typically reach 500 meters per minute.

[0005] With technological advancements and the need for cost control, the size of heat dissipation copper pipes is trending towards miniaturization. The most common size has shifted from 12.7mm to 9.52mm, while the demand for 7.5mm pipes is also increasing, showing a potential trend of surpassing 9.52mm. When handling small-diameter copper pipes (such as those with an outer diameter of 9.52mm and below), traditional induction heating systems often fail to achieve optimal configuration in terms of power, thermal efficiency, and control precision due to the small pipe mass and low heat capacity, resulting in considerable energy waste. For large-scale, 24 / 7 copper pipe manufacturers, this accumulated energy consumption represents a significant operational cost.

[0006] Therefore, developing a highly efficient online annealing device specifically designed for small-diameter copper tubes, capable of significantly reducing energy consumption while ensuring or even improving annealing quality, has become a pressing technical problem in this field, with significant economic and environmental value. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes. The high-frequency power supply cabinet uses a power supply with a rated frequency of 15000Hz, which is specially designed for small-diameter copper tubes. When processing copper tubes with a diameter of 9.52mm and below, energy consumption can be greatly reduced compared with similar equipment, saving up to 40% of energy consumption, thus achieving a simultaneous improvement in production efficiency and operational economy.

[0008] The technical solution to achieve the above objectives is: A high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes, comprising a feeding device, a heating device, a heat preservation device, a cooling device, a discharging device, a cooling water circulation system, an oiling tank, an electrical control cabinet, a high-frequency power supply cabinet, and an operating table, wherein: The feeding device is used to feed the copper tube into the heating device; The heating device is equipped with an induction coil for heating the copper tube; The heat preservation and cooling equipment are used to allow the heated copper tube to crystallize and soften. The discharge device is used to feed the processed copper tubes into the discharge frame; The electrical control cabinet is used to realize the electrical control of the entire equipment; The high-frequency power supply cabinet is used to output the power required for heating the induction coil of the heating equipment, and the high-frequency power supply cabinet adopts a power supply with a rated frequency of 15000Hz. The cooling water circulation system is used to cool the induction coils of the high-frequency power supply cabinet and the heating equipment. The oiling box is used to apply oil to the cooled copper pipes. The control panel is equipped with a monitoring screen, which is connected to the electrical control cabinet.

[0009] The above-mentioned high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes includes a feeding device, a heating device, a heat preservation device, a cooling device, and a discharging device arranged sequentially along the copper tube's travel direction. The cooling water circulation system is connected to the high-frequency power supply cabinet and the heating device, respectively. The oiling box is connected to the discharging device. The operating platform faces the online copper tube annealing equipment. The electrical control cabinet is connected to the high-frequency power supply cabinet, the feeding device, the heating device, the heat preservation device, the cooling device, and the discharging device, respectively.

[0010] This utility model discloses a high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes. The high-frequency power supply cabinet adopts a power supply with a rated frequency of 15000Hz, which is specially designed for small-diameter copper tubes. When processing copper tubes with a diameter of 9.52mm and below, energy consumption can be greatly reduced compared with similar equipment, saving up to 40% of energy consumption, thus achieving a simultaneous improvement in production efficiency and operational economy. Attached Figure Description

[0011] Figure 1 This is a front view of the high-efficiency online copper tube annealing equipment applicable to small-diameter copper tubes according to this utility model; Figure 2 This is a top view of the high-efficiency online copper tube annealing equipment applicable to small-diameter copper tubes according to this utility model. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solution of this utility model, its specific embodiments are described in detail below with reference to the accompanying drawings: Please see Figure 1 and Figure 2 The preferred embodiment of this utility model is a high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes, including a feeding device 1, a heating device 2, a heat preservation device 3, a cooling device 4, a discharging device 5, a cooling water circulation system 8, an oiling box 9, an electrical control cabinet 6, a high-frequency power supply cabinet 7, and an operating table 10.

[0013] This equipment is a complete online processing system. Feeding device 1, heating device 2, insulation device 3, cooling device 4, and discharging device 5 are arranged sequentially along the copper tube's travel direction. The electrical control cabinet 6, high-frequency power supply cabinet 7, and cooling water circulation system 8 are centrally located as the core power and control system. The oiling tank 9 and operating platform 10 are located on the online side as auxiliary units. The cooling water circulation system 8 is connected to the high-frequency power supply cabinet 7 and heating device 2, respectively, and the oiling tank 9 is connected to the discharging device 5. The operating platform 10 faces the online copper tube annealing equipment. The electrical control cabinet 6 is connected to the high-frequency power supply cabinet 7, feeding device 1, heating device 2, insulation device 3, cooling device 4, and discharging device 5, respectively.

[0014] Feeding device 1 is used to feed coiled copper tubes into heating device 2; heating device 2 is equipped with an induction coil to heat the copper tubes; heat preservation device 3 and cooling device 4 are used to allow the heated copper tubes sufficient time to crystallize and soften; discharging device 5 is used to send the processed copper tubes into a discharge frame; electrical control cabinet 6 is used to realize the electrical control of the entire equipment; high-frequency power supply cabinet 7 is used to output the power required for heating the induction coil of heating device 2, and the high-frequency power supply cabinet 7 uses a power supply with a rated frequency of 15000Hz; cooling water circulation system 8 is used to cool the high-frequency power supply cabinet 7 and the induction coil of heating device 2; oiling box 9 is used to apply oil to the cooled copper tubes to prevent rust and facilitate subsequent drawing or threading; the operating console 10 is equipped with a monitoring screen, which is connected to the electrical control cabinet 6. The operating console 10 is used by operators to operate the equipment and monitor the status of the entire equipment through the monitoring screen.

[0015] This utility model discloses a high-efficiency online copper tube annealing device suitable for small-diameter copper tubes. In use, after the coiled copper tube is unwound, it is stably fed into the system by the feeding device 1; it is instantly heated to the precise annealing temperature by the high-efficiency induction coil in the heating device 2; then it enters the heat preservation device 3 for temperature equalization to ensure uniform radial and axial temperature of the tube body; then it undergoes controlled-rate spray or mist cooling in the cooling device 4 to complete the transformation of the metallographic structure required by the process; finally, it is guided and wound up by the discharge device 5.

[0016] Existing online copper tube annealing equipment (hereinafter referred to as "typical equipment") typically uses a 900kW, 6000Hz solid-state induction power supply at the high-frequency power cabinet. The main innovation of this invention, a high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes (hereinafter referred to as "this equipment"), is upgrading the high-frequency power cabinet 7 to a higher-frequency induction power supply, significantly improving the efficiency of this equipment when heating small-diameter copper tubes. Specifically, replacing the existing 6000Hz power supply with a 15000Hz power supply achieves optimal efficiency when heating 7.5mm copper tubes; this frequency also provides better efficiency when heating 9.52mm copper tubes; simultaneously, this frequency can also accommodate small-batch production of 12.7mm copper tubes. Compared to existing typical equipment using a 6000Hz power supply, the specific energy-saving data of this equipment is shown in Table 1.

[0017] Table 1. Energy Saving Comparison between Typical Equipment and This Equipment: In summary, the high-efficiency online copper tube annealing equipment of this utility model, suitable for small-diameter copper tubes, uses a high-frequency power supply cabinet with a rated frequency of 15000Hz, which is specially designed for small-diameter copper tubes. When processing copper tubes with a diameter of 9.52mm and below, energy consumption can be greatly reduced compared with similar equipment, saving up to 40% of energy consumption, thus achieving a simultaneous improvement in production efficiency and operational economy.

[0018] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A high-efficiency online copper tube annealing device suitable for small-diameter copper tubes, characterized in that, This includes feeding equipment, heating equipment, insulation equipment, cooling equipment, discharging equipment, cooling water circulation system, oiling tank, electrical control cabinet, high-frequency power supply cabinet, and operating console, among which: The feeding device is used to feed the copper tube into the heating device; The heating device is equipped with an induction coil for heating the copper tube; The heat preservation and cooling equipment are used to allow the heated copper tube to crystallize and soften. The discharge device is used to feed the processed copper tubes into the discharge frame; The electrical control cabinet is used to realize the electrical control of the entire equipment; The high-frequency power supply cabinet is used to output the power required for heating the induction coil of the heating equipment, and the high-frequency power supply cabinet adopts a power supply with a rated frequency of 15000Hz. The cooling water circulation system is used to cool the induction coils of the high-frequency power supply cabinet and the heating equipment. The oiling box is used to apply oil to the cooled copper pipes. The control panel is equipped with a monitoring screen, which is connected to the electrical control cabinet.

2. The high-efficiency online copper tube annealing equipment suitable for small-diameter copper tubes according to claim 1, characterized in that, The feeding device, heating device, heat preservation device, cooling device, and discharging device are arranged sequentially along the copper tube travel direction. The cooling water circulation system is connected to the high-frequency power supply cabinet and the heating device respectively. The oiling box is connected to the discharging device. The operating platform faces the online copper tube annealing equipment. The electrical control cabinet is connected to the high-frequency power supply cabinet, the feeding device, the heating device, the heat preservation device, the cooling device, and the discharging device respectively.

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