A cooling device for tin-coated copper strip

Abstract

The utility model relates to a tin copper strip production equipment technical field, specifically disclose a kind of tin copper strip cooling device, including rack, sealing cooling box is equipped on the rack, sealing cooling box is provided with the conveying roller group for the horizontal traction copper strip movement, cooling mechanism and temperature control mechanism in it;The cooling mechanism includes spiral distribution's water cooling pipeline, and the water inlet and water outlet of water cooling pipeline are connected with external cooling medium source respectively, and the outer wall of water cooling pipeline is spirally provided with the heat sink of metal material;The upper and lower sides of conveying roller group towards sealing cooling box entrance are evenly distributed with gas distribution pipe in parallel, and the gas distribution pipe is equipped with the blast hole that nitrogen is sprayed to the upper and lower surfaces of copper strip, and nitrogen supply system is equipped on sealing cooling box;Through the composite cooling of spiral water cooling and nitrogen injection, closed-loop temperature control and self-adapting tension adjustment, the cooling efficiency, product quality are significantly improved, and energy consumption and maintenance cost are reduced simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of tin-coated copper strip production equipment, and specifically discloses a tin-coated copper strip cooling device. Background Technology

[0002] Tinned copper strip is a key material in photovoltaic soldering, electronic component connectors, and other fields. The uniformity and oxidation resistance of the tin plating layer on its surface directly affect conductivity and soldering reliability. In continuous tinning processes for copper strip, rapid cooling after high-temperature coating is one of the core steps, requiring efficient cooling while preventing plating oxidation. Currently, the cooling technologies commonly used in the industry suffer from the following problems:

[0003] Traditional water cooling devices often use straight-out or parallel pipe layouts, which have limited heat exchange area. Uneven heat dissipation in local areas of the copper strip can easily lead to coarsening of the plating crystals (grain size deviation ≥20%), and may even cause the copper strip to warp and deform.

[0004] In an open cooling environment, the high-temperature surface of the copper strip (>200℃) is directly exposed to the air, and the proportion of SnO2 generated by the oxidation of the tin plating layer can reach 3%-5%, which significantly increases the risk of oxidation and requires an additional polishing process, resulting in an increase in production costs of more than 15%.

[0005] Existing equipment relies heavily on manual adjustment of cooling water flow, which cannot respond to changes in copper strip temperature in real time (temperature fluctuation ±10℃). Overcooling can easily lead to embrittlement of the plating layer, while insufficient cooling will result in the copper strip not meeting the hardness standard (HV hardness deviation ≥15%).

[0006] In summary, there is an urgent need for a tinned copper strip cooling device that integrates efficient cooling, precise temperature control, anti-oxidation protection, and modular maintenance to solve the core problems of low cooling efficiency, poor product qualification rate, and high operating costs in existing technologies. Utility Model Content

[0007] This utility model proposes a tin-coated copper strip cooling device. The tin-coated copper strip cooling device achieves precise cooling through a cooling and temperature control mechanism, improving cooling efficiency and quality. A nitrogen protection system prevents copper strip oxidation and improves quality. Tension adjustment of the conveyor roller group ensures the copper strip is flat and avoids deformation. Each component is easy to maintain and replace. The exhaust port and drain port maintain a good working environment for the box and extend the service life of the equipment, thereby improving the production quality and efficiency of tin-coated copper strip.

[0008] This utility model is implemented as follows: a tin-coated copper strip cooling device includes a frame, a sealed cooling box on the frame, and a conveying roller group for horizontally traction of the copper strip, a cooling mechanism and a temperature control mechanism inside the sealed cooling box.

[0009] The cooling mechanism includes spirally distributed water cooling pipes, the inlet and outlet of which are respectively connected to an external cooling medium source, and a metal heat dissipation plate is spirally arranged on the outer wall of the water cooling pipes.

[0010] Gas distribution pipes are distributed parallel to each other on the upper and lower sides of the conveyor roller group facing the inlet of the sealed cooling box. The gas distribution pipes are provided with nozzles for spraying nitrogen gas onto the upper and lower surfaces of the copper strip. The sealed cooling box is provided with a nitrogen supply system. The gas distribution pipes are connected to the nitrogen supply system through pipes.

[0011] The temperature control mechanism includes a temperature sensor, a controller, and a regulating valve. The temperature sensor is located inside the sealed cooling box near the copper strip outlet. The controller is electrically connected to both the temperature sensor and the regulating valve. The regulating valve is installed on the inlet pipe of the cooling medium.

[0012] As a preferred embodiment of the tinned copper strip cooling device of this utility model, the heat sink is provided with a plurality of guide holes arranged in a matrix, the diameter of the guide holes is 3-8mm, and the center distance between adjacent guide holes is 10-15mm.

[0013] As a preferred embodiment of the tinned copper strip cooling device of this utility model, the nitrogen supply system includes a liquid nitrogen storage tank, an adsorption dryer, and a mass flow controller. The liquid nitrogen storage tank is connected to a pressure reducing valve via a high-pressure metal hose. The outlet of the pressure reducing valve is connected in series with the adsorption dryer and the mass flow controller via a stainless steel rigid pipe. The outlet of the mass flow controller is connected to the upper and lower gas distribution pipes via corrugated pipes, and the corrugated pipes and the distribution pipes are connected by a clamp-type quick-release connector.

[0014] As a preferred embodiment of the tinned copper strip cooling device of this utility model, the top of the sealed cooling box is provided with an exhaust port, a filter screen is installed at the exhaust port, and the bottom of the sealed cooling box is provided with a drain port, a valve is installed at the drain port.

[0015] As a preferred embodiment of the tin-coated copper strip cooling device of this utility model, the conveying roller group includes an inlet guide roller, an outlet guide roller, and a tension adjusting roller. The inlet guide roller and the outlet guide roller are rotatably connected to the inlet and outlet of the inner wall of the sealed cooling box through bearings. The tension adjusting roller is located between the inlet guide roller and the outlet guide roller, and cylinders that are fixed to the inner wall of the sealed cooling box are vertically symmetrically arranged below both ends of the tension adjusting roller. The piston rods of the two cylinders are rigidly connected to both ends of the tension adjusting roller. A drive motor is provided on one side of the sealed cooling box, and the output shaft of the drive motor is coaxially connected to the rotating shaft of the inlet guide roller through a coupling.

[0016] In a preferred embodiment of the tinned copper strip cooling device of this utility model, a pressure sensor is provided at the connection between the piston rod of the cylinder and the tension adjusting roller, and the pressure sensor is connected to the controller signal.

[0017] As a preferred embodiment of the tin-coated copper strip cooling device of this utility model, the surfaces of the inlet guide roller and the outlet guide roller are covered with a polytetrafluoroethylene layer with a thickness of 1-3mm; the surface of the tension adjusting roller is covered with a high-temperature resistant silicone layer.

[0018] The beneficial effects of this utility model are:

[0019] 1. The cooling mechanism is combined with the temperature control mechanism to achieve precise cooling of the tinned copper strip, improve cooling efficiency and quality, and effectively prevent copper strip oxidation through the nitrogen protection system, thereby improving the quality of the copper strip.

[0020] 2. The tension adjustment function of the conveyor roller group ensures that the copper strip remains flat during the cooling process and avoids deformation; the design of each component facilitates maintenance and replacement, such as the quick-release connector of the nitrogen supply system, which improves the convenience and reliability of the equipment; the design of exhaust ports and drainage ports maintains a good working environment inside the housing and extends the service life of the equipment. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 for Figure 1 A schematic diagram of the AA-direction structure.

[0024] Figure 3 This is a schematic diagram of the structure of the water cooling pipe and heat dissipation plate of this utility model.

[0025] Figure 4 This is a schematic diagram of the gas distribution pipe and nozzle of this utility model.

[0026] Figure 5 This is a schematic diagram of the structure of the cylinder and pressure sensor of this utility model.

[0027] Figure 6 This is a schematic diagram of the structure of the inlet guide roller and the polytetrafluoroethylene layer of this utility model.

[0028] The markings in the diagram are: 1. Frame; 2. Sealed cooling box; 3. Water cooling pipe; 4. Heat sink; 5. Gas distribution pipe; 6. Nozzle; 7. Temperature sensor; 8. Controller; 9. Regulating valve; 10. Flow guide hole; 11. Liquid nitrogen storage tank; 12. Adsorption dryer; 13. Mass flow controller; 14. Pressure reducing valve; 15. Exhaust port; 16. Filter screen; 17. Drain outlet; 18. Valve; 19. Inlet guide roller; 20. Outlet guide roller; 21. Tension regulating roller; 22. Cylinder; 23. Drive motor; 24. Pressure sensor; 25. Polytetrafluoroethylene layer; 26. High-temperature resistant silicone layer. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0030] Please see Figure 1-6 A tinned copper strip cooling device includes a frame 1, a sealed cooling box 2 on the frame 1, and a conveying roller group for horizontally traction of the copper strip, a cooling mechanism and a temperature control mechanism inside the sealed cooling box 2.

[0031] The cooling mechanism includes spirally distributed water cooling pipes 3, the inlet and outlet of which are connected to an external cooling medium source, and a metal heat dissipation plate 4 is spirally arranged on the outer wall of the water cooling pipes 3.

[0032] Gas distribution pipes 5 are distributed parallel to each other on the upper and lower sides of the conveyor roller group facing the inlet of the sealed cooling box 2. The gas distribution pipes 5 are provided with nozzles 6 for spraying nitrogen gas onto the upper and lower surfaces of the copper strip. The sealed cooling box 2 is provided with a nitrogen supply system. The gas distribution pipes 5 are connected to the nitrogen supply system through pipes.

[0033] The temperature control mechanism includes a temperature sensor 7, a controller 8, and a regulating valve 9. The temperature sensor 7 is located inside the sealed cooling box 2 near the copper strip outlet. The controller 8 is electrically connected to both the temperature sensor 7 and the regulating valve 9. The regulating valve 9 is installed on the inlet pipe of the cooling medium.

[0034] In this embodiment: the tinned copper strip, driven by the drive motor 23, enters the sealed cooling box 2 via the inlet guide roller 19, and is pulled horizontally by the conveyor roller group; the cooling medium circulates in the water cooling pipe 3 of the cooling mechanism, and carries away the heat of the copper strip through the heat sink 4 to achieve cooling; the gas distribution pipe 5, under the action of the nitrogen supply system, sprays nitrogen gas onto the upper and lower surfaces of the copper strip to form a protective gas film to prevent oxidation; the temperature sensor 7 monitors the temperature of the copper strip near the outlet in real time and transmits the data to the controller 8. The controller 8 controls the regulating valve 9 to adjust the flow rate of the cooling medium according to the difference between the set temperature and the actual temperature, and accurately controls the cooling temperature; the tension regulating roller 21, under the coordinated action of the cylinder 22 and the pressure sensor 24, dynamically adjusts the tension of the copper strip to ensure that the copper strip is flat; the cooled copper strip is sent out of the box via the outlet guide roller 20, and the gas and condensate generated in the process are discharged through the exhaust port 15 and the drain port 17, respectively, realizing stable cooling and anti-oxidation of the tinned copper strip.

[0035] As a technical optimization of this utility model, the heat sink 4 is provided with a number of flow guide holes 10 arranged in a matrix. The diameter of the flow guide holes 10 is 3-8mm and the center distance between adjacent flow guide holes 10 is 10-15mm.

[0036] In this embodiment, the heat sink 4 has flow guide holes 10 with specific aperture and center distance, which increases the contact area between the air and the heat sink 4 and the airflow, accelerates the dissipation of heat on the surface of the heat sink 4, further improves the cooling efficiency, and makes the cooling effect more uniform.

[0037] As a technical optimization of this utility model, the nitrogen supply system includes a liquid nitrogen storage tank 11, an adsorption dryer 12, and a mass flow controller 13. The liquid nitrogen storage tank 11 is connected to a pressure reducing valve 14 through a high-pressure metal hose. The outlet of the pressure reducing valve 14 is connected in series with the adsorption dryer 12 and the mass flow controller 13 via a stainless steel rigid pipe. The outlet of the mass flow controller 13 is connected to the upper and lower gas distribution pipes 5 through corrugated pipes, and the corrugated pipes and the distribution pipes are connected by a clamp-type quick-release connector.

[0038] In this embodiment, the mass flow controller 13 precisely controls the nitrogen flow rate and is connected to the gas distribution pipe 5 through a corrugated pipe and a clamp-type quick-release connector to ensure a stable and precise supply of nitrogen, ensure the anti-oxidation effect of the copper strip, and facilitate maintenance and replacement of components.

[0039] As a technical optimization of this utility model, the top of the sealed cooling box 2 is provided with an exhaust port 15, a filter screen 16 is installed at the exhaust port 15, and the bottom of the sealed cooling box 2 is provided with a drain port 17, a valve 18 is installed at the drain port 17.

[0040] In this embodiment: the exhaust port 15 and filter screen 16 at the top of the sealed cooling box 2 can discharge excess gas and impurities inside the box, keeping the gas inside the box clean; the drain port 17 and valve 18 at the bottom are used to discharge condensate or excess cooling water generated during the cooling process, keeping the inside of the box dry and ensuring the normal operation of the equipment.

[0041] As a technical optimization of this utility model, the conveyor roller group includes an inlet guide roller 19, an outlet guide roller 20, and a tension adjusting roller 21. The inlet guide roller 19 and the outlet guide roller 20 are rotatably connected to the inlet and outlet of the inner wall of the sealed cooling box 2 via bearings. The tension adjusting roller 21 is located between the inlet guide roller 19 and the outlet guide roller 20, and cylinders 22 are vertically and symmetrically arranged below both ends of the tension adjusting roller 21 and are fixed to the inner wall of the sealed cooling box 2. The piston rods of the two cylinders 22 are rigidly connected to both ends of the tension adjusting roller 21. A drive motor 23 is provided on one side of the sealed cooling box 2, and the output shaft of the drive motor 23 is coaxially connected to the rotating shaft of the inlet guide roller 19 via a coupling.

[0042] In this embodiment: In the conveyor roller group, the inlet guide roller 19 and the outlet guide roller 20 guide the copper strip to smoothly enter and exit the box. The tension adjustment roller 21 adjusts its height through the cylinder 22, and the tension can be adjusted according to the needs of the copper strip to ensure that the copper strip remains flat during the cooling process. The drive motor 23 provides power for the copper strip conveying.

[0043] As a technical optimization of this utility model, a pressure sensor 24 is provided at the connection between the piston rod of the cylinder 22 and the tension adjusting roller 21, and the pressure sensor 24 is connected to the controller 8.

[0044] In this embodiment, the pressure sensor 24 at the connection between the piston rod of cylinder 22 and tension adjusting roller 21 monitors the copper strip tension in real time and feeds the signal back to controller 8, so that controller 8 can control the action of cylinder 22 according to the tension, realize precise automatic adjustment of copper strip tension, and ensure the cooling quality of copper strip.

[0045] As a technical optimization of this utility model, the surfaces of the inlet guide roller 19 and the outlet guide roller 20 are covered with a polytetrafluoroethylene layer 25 with a thickness of 1-3mm; the surface of the tension adjusting roller 21 is covered with a high-temperature resistant silicone layer 26.

[0046] In this embodiment: the polytetrafluoroethylene layer 25 on the surface of the inlet guide roller 19 and the outlet guide roller 20 has low friction and wear-resistant properties, reducing wear on the copper strip surface; the high-temperature resistant silicone layer 26 on the surface of the tension adjusting roller 21 increases friction, prevents the copper strip from slipping, and adapts to high-temperature environments to ensure stable copper strip conveying.

[0047] Working principle and usage process of this utility model:

[0048] The equipment is started, and the drive motor 23 rotates, causing the inlet guide roller 19 to rotate. The tinned copper strip enters the sealed cooling box 2 under the guidance of the inlet guide roller 19, and the conveyor roller group begins to pull the copper strip to move. The cooling medium circulates in the water cooling pipe 3 and cools the copper strip through the heat sink 4. The nitrogen supply system works, and the gas distribution pipe 5 sprays nitrogen onto the surface of the copper strip. The temperature sensor 7 monitors the temperature of the copper strip in real time, and the data is transmitted to the controller 8. The controller 8 controls the regulating valve 9 to adjust the flow rate of the cooling medium. The pressure sensor 24 monitors the tension of the copper strip, and the controller 8 controls the cylinder 22 to act according to the feedback signal, adjusting the height of the tension regulating roller 21. The cooled copper strip is sent out of the sealed cooling box 2 through the outlet guide roller 20, and the gas and condensate in the box are discharged through the exhaust port 15 and the drain port 17, respectively.

[0049] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A tin-coated copper strip cooling device, comprising a frame (1), characterized in that: The frame (1) is provided with a sealed cooling box (2), and the sealed cooling box (2) is provided with a conveyor roller group for horizontal traction of copper strip movement, a cooling mechanism and a temperature control mechanism. The cooling mechanism includes a spirally distributed water cooling pipe (3), the inlet and outlet of the water cooling pipe (3) are respectively connected to an external cooling medium source, and a metal heat dissipation plate (4) is spirally arranged on the outer wall of the water cooling pipe (3). Gas distribution pipes (5) are distributed parallel to each other on the upper and lower sides of the conveyor roller group facing the inlet of the sealed cooling box (2). The gas distribution pipes (5) are provided with nozzles (6) for spraying nitrogen gas onto the upper and lower surfaces of the copper strip. The sealed cooling box (2) is provided with a nitrogen supply system. The gas distribution pipes (5) are connected to the nitrogen supply system through pipes. The temperature control mechanism includes a temperature sensor (7), a controller (8), and a regulating valve (9). The temperature sensor (7) is located inside the sealed cooling box (2) near the copper strip outlet. The controller (8) is electrically connected to the temperature sensor (7) and the regulating valve (9) respectively. The regulating valve (9) is installed on the water inlet pipe of the cooling medium.

2. The tin-coated copper strip cooling device according to claim 1, characterized in that: The heat sink (4) has a number of flow guide holes (10) arranged in a matrix. The diameter of the flow guide holes (10) is 3-8mm and the center distance between adjacent flow guide holes (10) is 10-15mm.

3. The tin-coated copper strip cooling device according to claim 1, characterized in that: The nitrogen supply system includes a liquid nitrogen storage tank (11), an adsorption dryer (12), and a mass flow controller (13). The liquid nitrogen storage tank (11) is connected to a pressure reducing valve (14) via a high-pressure metal hose. The outlet of the pressure reducing valve (14) is connected in series with the adsorption dryer (12) and the mass flow controller (13) via a stainless steel hard pipe. The outlet of the mass flow controller (13) is connected to the upper and lower gas distribution pipes (5) via corrugated pipes. The corrugated pipes and the distribution pipes are connected by a clamp-type quick-release connector.

4. The tin-coated copper strip cooling device according to claim 1, characterized in that: The top of the sealed cooling box (2) is provided with an exhaust port (15), a filter screen (16) is installed at the exhaust port (15), and the bottom of the sealed cooling box (2) is provided with a drain port (17), a valve (18) is installed at the drain port (17).

5. The tin-coated copper strip cooling device according to claim 1, characterized in that: The conveying roller group includes an inlet guide roller (19), an outlet guide roller (20), and a tension adjusting roller (21). The inlet guide roller (19) and the outlet guide roller (20) are rotatably connected to the inlet and outlet of the inner wall of the sealed cooling box (2) by bearings. The tension adjusting roller (21) is located between the inlet guide roller (19) and the outlet guide roller (20). Cylinders (22) are vertically and symmetrically arranged below both ends of the tension adjusting roller (21) and are fixed to the inner wall of the sealed cooling box (2). The piston rods of the two cylinders (22) are rigidly connected to both ends of the tension adjusting roller (21). A drive motor (23) is provided on one side of the sealed cooling box (2). The output shaft of the drive motor (23) is coaxially connected to the rotating shaft of the inlet guide roller (19) through a coupling.

6. The tin-coated copper strip cooling device according to claim 5, characterized in that: A pressure sensor (24) is provided at the connection between the piston rod of the cylinder (22) and the tension adjusting roller (21), and the pressure sensor (24) is connected to the controller (8) via signal.

7. The tin-coated copper strip cooling device according to claim 5, characterized in that: The surfaces of the inlet guide roller (19) and the outlet guide roller (20) are covered with a polytetrafluoroethylene layer (25) with a thickness of 1-3 mm; the surface of the tension adjusting roller (21) is covered with a high-temperature resistant silicone layer (26).

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