A cooling device for oxygen-free copper plate strip hot rolling

Abstract

The utility model relates to a kind of cooling device for oxygen-free copper plate strip hot rolling, the utility model effectively solves the problem that the existing cooling device can easily cause oxygen-free copper plate strip warping and deformation, inconvenient for oxygen-free copper plate strip to be cooled fully.The cooling device for oxygen-free copper plate strip hot rolling can form air curtain barrier at the both ends of sealing cover by the inert air curtain pipe of both sides, effectively block air intrusion, fundamentally prevent oxygen-free copper plate strip high-temperature oxidation, improve surface quality;Heat exchange roller mechanism can be directly contacted with oxygen-free copper plate strip and conductive cooling, improve heat exchange efficiency, while micro-fog cooling mechanism can carry out micro-fog spray evaporation heat absorption to copper plate strip, which can further improve cooling efficiency, and avoid temperature sudden change caused by traditional water cooling, effectively prevent copper plate strip warping or deformation;Micro-fog cooling mechanism can adjust spray angle, facilitate to expand the coverage of micro-fog, avoid the generation of cooling blind area, more convenient for oxygen-free copper plate strip cooling.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal rolling cooling devices, specifically relating to a cooling device for hot rolling of oxygen-free copper strip. Background Technology

[0002] Oxygen-free copper products are mainly used in the electronics industry. Due to their high conductivity and low oxygen content, oxygen-free copper sheets and strips are widely used in high-end electronic components, superconducting substrates and other fields.

[0003] Hot rolling is a key production process, with rolling temperatures typically reaching 500-600℃. Traditional cooling methods have the following drawbacks: During open spray cooling, the high-temperature copper strip is exposed to the air, resulting in the formation of an oxide layer on the surface, which increases the cost of subsequent pickling by 15-20%, and the residual oxides reduce the bonding strength of the weld wire; Existing ordinary water-cooled rollers have low thermal conductivity and structural limitations, resulting in large temperature differences in different parts of the strip, which can easily cause warping and deformation of the oxygen-free copper strip, and it is not convenient to fully cool the oxygen-free copper strip, resulting in poor cooling effect and making it unsuitable for cooling oxygen-free copper strips. Utility Model Content

[0004] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides a cooling device for hot rolling of oxygen-free copper strip. This device effectively blocks air intrusion, fundamentally preventing high-temperature oxidation of the oxygen-free copper strip and improving surface quality. The heat exchange roller mechanism can directly contact the oxygen-free copper strip for conduction cooling, while the micro-mist cooling mechanism can spray micro-mist onto the copper strip for evaporation and heat absorption, improving cooling efficiency and avoiding sudden temperature changes caused by traditional water cooling. This ensures minimal temperature variation across different parts of the copper strip, effectively preventing warping or deformation. Furthermore, the micro-mist cooling mechanism can adjust the spray angle to expand the coverage area of ​​the micro-mist, facilitating the cooling of oxygen-free copper strips of different lengths, avoiding cooling blind spots, and making it more convenient to use when cooling oxygen-free copper strips.

[0005] A cooling device for hot rolling oxygen-free copper strip includes a sealing cover and a water tank. Support rollers for supporting the oxygen-free copper strip are rotatably connected to both sides of the bottom of the sealing cover, and a heat exchange roller mechanism for cooling the oxygen-free copper strip is rotatably connected to the center. Inert gas curtain pipes for ensuring a low-oxygen environment are fixedly installed at both ends inside the sealing cover. A micro-mist cooling mechanism for auxiliary cooling of the oxygen-free copper strip is provided at the top of the sealing cover. The water tank is fixedly connected to the upper surface of the sealing cover. A water supply mechanism for supplying water to the heat exchange roller mechanism and the micro-mist cooling mechanism is provided inside the water tank, with the outlet end of the water supply mechanism connected to the inlet end of both the heat exchange roller mechanism and the micro-mist cooling mechanism. A drain pipe is connected to the outlet end of the heat exchange roller mechanism.

[0006] Preferably, the heat exchange roller mechanism includes a heat exchange roller with an internal spiral water channel, a rotary joint connecting both ends of the heat exchange roller, and several infrared temperature sensors equidistantly embedded outside the heat exchange roller. The spiral water channel is supplied with cooling water through the rotary joint at the water inlet end, and all the infrared temperature sensors are arranged in a straight line along the axial direction of the heat exchange roller. There are two heat exchange roller mechanisms, and both heat exchange roller mechanisms are horizontally arranged in the middle of the bottom end of the sealing cover. The top end of the heat exchange roller is on the same horizontal plane as the top end of the support roller.

[0007] Preferably, the micro-mist cooling mechanism includes a horizontally rotatably connected nozzle, multiple micro-mist nozzles located at the bottom of the nozzle, a worm gear fixed to the nozzle, a worm meshing with the worm gear, and a drive motor driving the worm. The number of nozzles is four, and all four nozzles are horizontally rotatably connected to the top of the sealed cover. A worm gear is fixedly connected to the same end of each nozzle. The worm is connected to the output end of the drive motor via a spline and is connected to the four worm gears for transmission.

[0008] Preferably, the water supply mechanism includes a water pump, a first diversion pipe and a second diversion pipe connected to the outlet end of the water pump, and a solenoid valve for controlling the flow of each nozzle. The water pump is fixedly connected to the upper surface of the sealing cover. The diversion end of the first diversion pipe is connected to multiple nozzles respectively, and the diversion end of the second diversion pipe is connected to the rotary joint at the inlet end of the heat exchange roller.

[0009] Preferably, the inert gas curtain pipes are symmetrically arranged on the inner walls of the inlet and outlet sides of the sealing cover, and the two inert gas curtain pipes are connected by a vent pipe and connected to an external inert gas pipeline through the vent pipe.

[0010] Preferably, a protective cover is fixedly connected to the top of the sealing cover near the worm gear, and the protective cover covers the outside of the worm gear and worm. The drive motor is fixedly installed on the side of the protective cover, and the worm is horizontally inserted inside the protective cover.

[0011] The beneficial effects of the above technical solution are as follows: This cooling device for hot rolling oxygen-free copper strip utilizes a heat exchange roller mechanism, inert gas curtain pipes, a micro-mist cooling mechanism, and a water supply mechanism. The inert gas curtain pipes on both sides form an air curtain barrier at both ends of the sealing cover, effectively blocking air intrusion and fundamentally preventing high-temperature oxidation of the oxygen-free copper strip, thus improving surface quality. The heat exchange roller mechanism directly contacts the oxygen-free copper strip for conduction cooling, and it rolls along with the moving strip, improving heat exchange efficiency. The micro-mist cooling mechanism sprays a fine mist onto the copper strip for evaporative heat absorption, further improving cooling efficiency and avoiding the sudden temperature changes caused by traditional water cooling. This ensures minimal temperature variation across different parts of the copper strip, effectively preventing warping or deformation. Furthermore, the micro-mist cooling mechanism allows for adjustment of the spray angle, facilitating wider coverage of the micro-mist and enabling cooling of oxygen-free copper strips of different lengths without creating cooling blind spots, making it more convenient for cooling oxygen-free copper strips. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the heat exchange roller mechanism and inert gas curtain tube of this utility model in their disassembled state. Figure 3 This is a schematic diagram of the micro-mist cooling mechanism and water supply mechanism of this utility model; Figure 4 This is a schematic diagram of the drainage pipe of this utility model; Figure 5 This is a schematic diagram of the cross-sectional state of the heat exchange roller of this utility model.

[0013] In the diagram: 1. Sealing cover; 2. Water tank; 3. Support roller; 4. Heat exchange roller mechanism; 401. Heat exchange roller; 402. Spiral water channel; 403. Rotary joint; 404. Infrared temperature sensor; 5. Inertial air curtain pipe; 6. Ventilation pipe; 7. Micro-mist cooling mechanism; 701. Nozzle; 702. Micro-mist nozzle; 703. Worm gear; 704. Worm; 705. Drive motor; 8. Protective cover; 9. Water supply mechanism; 901. Water pump; 902. First diversion pipe; 903. Solenoid valve; 904. Second diversion pipe; 10. Drain pipe. Detailed Implementation

[0014] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 5 The embodiments are described in detail below.

[0015] This embodiment provides a cooling device for hot rolling of oxygen-free copper strip, as shown in the attached figure. Figure 1-5As shown, the device includes a sealing cover 1 and a water storage tank 2. Support rollers 3, capable of supporting oxygen-free copper strips, are rotatably connected to both sides of the bottom of the sealing cover 1. A heat exchange roller mechanism 4, capable of cooling the oxygen-free copper strip, is located in the middle of the bottom of the sealing cover 1. The oxygen-free copper strip is horizontally placed on the support rollers 3 and the heat exchange roller mechanism 4. The heat exchange roller mechanism 4 includes a heat exchange roller 401, a spiral water channel 402, a rotary joint 403, and an infrared temperature sensor 404. The heat exchange roller 401 is horizontally rotatably connected to the middle of the bottom of the sealing cover 1. The top of the heat exchange roller 401 is at the same level as the top of the support roller 3. A spiral water channel 402 is axially formed inside the heat exchange roller 401. Rotary joints 403 are connected to both ends of the heat exchange roller 401, and the spiral water channel 402 communicates with both rotary joints 403. The rotary joints 403 at both ends ensure heat exchange. While the roller 401 rotates, it can still inject cooling water into the spiral channel 402 through the rotary joint 403, and ensure that the high-temperature water that has undergone heat exchange in the spiral channel 402 flows out from the outlet end without affecting the operation. There are several infrared temperature sensors 404, and all of them are equidistantly embedded in the outside of the heat exchange roller 401. The infrared temperature sensors 404 are in a straight line, and the temperature of different parts in the width direction of the oxygen-free copper strip can be detected by the infrared temperature sensors 404. The two ends of the heat exchange roller 401 are the inlet and outlet of the cooling water, respectively, which can be introduced into the spiral channel 402. The heat exchange roller 401 directly contacts the copper strip for heat transfer, and the continuously flowing cooling water can transfer the heat on the copper strip, so that the heat exchange roller 401 can fully cool the oxygen-free copper strip.

[0016] Both ends of the sealed cover 1 are fixedly installed with inert gas curtain pipes 5, which can provide inert gas protection to both ends of the sealed cover 1. The two inert gas curtain pipes 5 are respectively fixedly installed on the inner side wall of the sealed cover 1 near the inlet and outlet. The air outlets of the two inert gas curtain pipes 5 are vertically downward. Both ends of the two inert gas curtain pipes 5 are connected to vent pipes 6, which can introduce inert gas into them. The two vent pipes 6 are interconnected and connected to external inert gas pipelines. Inert gas can be introduced into the two inert gas curtain pipes 5 through external inert gas pipelines, thereby forming an inert gas air curtain at both ends of the sealed cover 1, blocking air intrusion, maintaining a low oxygen environment inside the sealed cover 1, and ensuring that the oxygen-free copper strip will not produce strong oxidation.

[0017] The top of the sealed cover 1 is equipped with a micro-mist cooling mechanism 7 for auxiliary cooling of oxygen-free copper strip. The micro-mist cooling mechanism 7 includes a nozzle 701, a micro-mist nozzle 702, a worm gear 703, a worm 704, and a drive motor 705. There can be four nozzles 701, and each of the four nozzles 701 has a worm gear 703 fixedly connected to the same side. All four nozzles 701 are horizontally rotatably connected to the top of the sealed cover 1, and multiple micro-mist nozzles 702 are equidistantly fixed at the bottom of each nozzle 701. The outlets of the multiple micro-mist nozzles 702 are all vertically downwards. The bottoms of the four worm gears 703 are all... The transmission is connected by worm gears 704, and all four worm gears 704 are fixedly installed at the output end of the drive motor 705. The drive motor 705 drives the worm gears 704 to rotate, which drives the four worm wheels 703 to rotate synchronously, thereby adjusting the tilt angle of multiple micro-mist nozzles 702 below the nozzle 701, so that the sprayed micro-particle range is larger. A protective cover 8 is fixedly connected to the top of the sealing cover 1 near the worm wheel 703, and the protective cover 8 covers the outside of the worm wheel 703 and worm gears 704. The drive motor 705 is fixedly installed on the side of the protective cover 8, which can support the drive motor 705 and worm gears 704.

[0018] The water storage tank 2 is fixedly connected to the upper surface of the sealing cover 1, and its interior is equipped with a water supply mechanism 9 that supplies water to the micro-mist cooling mechanism 7 and the heat exchange roller mechanism 4. The water supply mechanism 9 includes a water pump 901, a first diversion pipe 902, a solenoid valve 903, and a second diversion pipe 904. The water pump 901 is located inside the water storage tank 2, and its outlet end is connected to the first diversion pipe 902 and the second diversion pipe 904 respectively. The diversion end of the first diversion pipe 902 is connected to the end of each of the four nozzles 701 away from the worm gear 703, and a solenoid valve 903 is fixedly installed at each of the parts where the diversion end of the first diversion pipe 902 connects to the four nozzles 701. The flow of the four nozzles 701 can be controlled by the solenoid valve 903. This facilitates spray cooling of different parts of the oxygen-free copper strip. Furthermore, the infrared temperature sensor 404 detects the temperature difference along the copper strip's movement direction, thereby controlling the micro-mist nozzles 702 below the corresponding spray pipe 701 to spray and cool the higher-temperature areas. This allows for dynamic adjustment of the overall temperature change of the copper strip, minimizing the temperature difference range and preventing warping or deformation due to large temperature variations. The second diversion pipe 904's diversion end is connected to the water inlet of the two heat exchange rollers 401. Water from the water tank 2 is pumped by the water pump 901 to the second diversion pipe 904 and then into the spiral water channels 402 inside the two heat exchange rollers 401, thus enabling the heat exchange rollers 401 to cool the oxygen-free copper strip.

[0019] The rotary joints 403 at the water outlet ends of the two heat exchange rollers 401 are connected to drain pipes 10. The end of the drain pipe 10 away from the heat exchange rollers 401 can be connected to external heat exchange equipment. The heat in the high-temperature water that has absorbed the heat from the oxygen-free copper plate can be recovered and reused through the external heat exchange equipment. The cooled water can be reinjected into the water storage tank 2, thus forming a water cycle and ensuring the rational use of resources.

[0020] In summary, the operating steps of this cooling device for hot rolling of oxygen-free copper strip are as follows: 1. First, fill the water storage tank 2 with cooling water to the rated level, and connect the external inert gas source to the vent pipe 6. Connect the drain pipe 10 to the external plate heat exchanger or waste heat boiler. 2. Open the inert gas supply valve to allow the gas to be sprayed downward through the inert gas curtain pipe 5, forming a continuous gas curtain at the inlet and outlet of the sealing cover 1. Proceed to the next step when the oxygen content inside the sealing cover 1 is at a low level. 3. The hot-rolled oxygen-free copper strip is horizontally fed into the sealing cover 1. The strip is synchronously supported and transported by the support roller 3 and the heat exchange roller 401. The water pump 901 is started, and cooling water is injected into the spiral water channel 402 of the heat exchange roller 401 through the second diversion pipe 904 to transfer heat and cool the part of the strip in contact with the heat exchange roller 401. The infrared temperature sensor 404 on the two heat exchange rollers 401 can monitor the temperature difference of each part of the strip in real time. The drive motor 705 drives the worm 704 to drive the worm wheel 703 to rotate, so that the micro-mist nozzle 702 at the bottom of the spray pipe 701 tilts, thereby expanding the spray coverage area. 4. The high-temperature water discharged from the heat exchange roller 401 enters the external heat exchange equipment through the drain pipe 10, and the cooled water can be returned to the water storage tank 2 to form a cycle.

[0021] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

Claims

1. A cooling device for hot rolling of oxygen-free copper strip, comprising a sealing cover (1) and a water tank (2), characterized in that: The sealing cover (1) has two rotatably connected support rollers (3) for supporting oxygen-free copper strips on both sides of the bottom inside, and a heat exchange roller mechanism (4) for cooling oxygen-free copper strips is rotatably connected in the middle; inert gas curtain pipes (5) for ensuring that the sealing cover (1) is in a low-oxygen environment are fixedly installed at both ends inside the sealing cover (1); a micro-mist cooling mechanism (7) for auxiliary cooling of oxygen-free copper strips is provided at the top inside the sealing cover (1); the water tank (2) is fixedly connected to the upper surface of the sealing cover (1); a water supply mechanism (9) for supplying water to the heat exchange roller mechanism (4) and the micro-mist cooling mechanism (7) is provided in the water tank (2); the water outlet of the water supply mechanism (9) is connected to the water inlet of the heat exchange roller mechanism (4) and the micro-mist cooling mechanism (7); and a drain pipe (10) is connected to the outlet of the heat exchange roller mechanism (4).

2. The cooling device for hot rolling of oxygen-free copper strip according to claim 1, characterized in that: The heat exchange roller mechanism (4) includes a heat exchange roller (401) with a spiral water channel (402) inside, a rotary joint (403) connected to both ends of the heat exchange roller (401), and several infrared temperature sensors (404) equidistantly embedded outside the heat exchange roller (401). The spiral water channel (402) is connected to cooling water through the rotary joint (403) at the water inlet end, and all the infrared temperature sensors (404) are arranged in a straight line along the axial direction of the heat exchange roller (401). There are two heat exchange roller mechanisms (4), and both heat exchange roller mechanisms (4) are horizontally arranged in the middle of the bottom end of the sealing cover (1). The top end of the heat exchange roller (401) is on the same horizontal plane as the top end of the support roller (3).

3. The cooling device for hot rolling of oxygen-free copper strip according to claim 2, characterized in that: The micro-mist cooling mechanism (7) includes a horizontally rotatably connected nozzle (701), multiple micro-mist nozzles (702) located at the bottom of the nozzle (701), a worm wheel (703) fixed to the nozzle (701), a worm (704) meshing with the worm wheel (703), and a drive motor (705) driving the worm (704). There are four nozzles, and all four nozzles (701) are horizontally rotatably connected to the top of the inside of the sealing cover (1). A worm wheel (703) is fixedly connected to the same end of each nozzle (701). The worm (704) is connected to the output end of the drive motor (705) through a spline and is connected to the four worm wheels (703) in a transmission connection.

4. A cooling device for hot rolling of oxygen-free copper strip according to claim 3, characterized in that: The water supply mechanism (9) includes a water pump (901), a first diversion pipe (902) and a second diversion pipe (904) connected to the outlet of the water pump (901), and a solenoid valve (903) controlling the flow of each nozzle (701). The water pump (901) is located inside the water storage tank (2). The diversion end of the first diversion pipe (902) is connected to multiple nozzles (701) respectively. The diversion end of the second diversion pipe (904) is connected to the rotary joint (403) at the inlet end of the heat exchange roller (401).

5. A cooling device for hot rolling of oxygen-free copper strip according to claim 1, characterized in that: The inert gas curtain pipes (5) are symmetrically arranged on the inner walls of the inlet and outlet sides of the sealing cover (1), and the two inert gas curtain pipes (5) are connected by a vent pipe (6) and are connected to the external inert gas pipeline through the vent pipe (6).

6. A cooling device for hot rolling of oxygen-free copper strip according to claim 3, characterized in that: The top of the sealing cover (1) near the worm gear (703) is fixedly connected to a protective cover (8), and the protective cover (8) covers the outside of the worm gear (703) and the worm (704). The drive motor (705) is fixedly installed on the side of the protective cover (8), and the worm (704) is horizontally inserted inside the protective cover (8).

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