Annealing device for cold-rolled steel coil
By designing an all-around cooling and insulation device, the problems of poor cooling effect and large temperature difference in the cold rolling annealing device were solved, achieving efficient cooling and temperature difference control, and reducing resource waste.
Patent Information
- Application Number
- CN202520278569.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing cold rolling annealing equipment has poor cooling effect, low cooling efficiency, serious waste of resources, and large temperature difference between the inside and outside of the steel coil after cooling, which easily leads to adhesion.
An apparatus was designed that includes an annealing furnace, a liquid storage tank, a cooling tank, and a heat preservation device. It achieves all-round cooling through multiple nozzles and spray heads, recovers the coolant, uses rollers to transport cold-rolled steel coils, and reduces temperature difference by combining the heat preservation device.
It achieves a comprehensive cooling effect, improves cooling efficiency, reduces resource waste, and reduces the temperature difference between the inside and outside of the steel coil through insulation, preventing sticking.
Smart Images
Figure CN223793208U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of steel coil processing technology, and more specifically, relates to an annealing device for cold-rolled steel coils. Background Technology
[0002] The steel industry, also known as the ferrous metallurgy industry, is a crucial basic industrial sector. The availability of its raw materials, fuels, and auxiliary materials significantly impacts the scale, product quality, economic benefits, and industrial layout of the steel industry. The automotive, home appliance, and other related industries have an increasingly evident demand for high-strength, cold-rolled steel with excellent surface quality. Annealing and cooling are essential components in the production of cold-rolled steel.
[0003] Existing cooling devices for cold rolling annealing have several drawbacks: First, the cooling effect is poor, the cooling quality is low, and the cooling efficiency is low, resulting in inconsistent cold-rolled quality. Second, the coolant used for cooling is essentially disposable, requiring draining after each cooling cycle, leading to resource waste. Finally, some cooling devices do not provide comprehensive cooling; during the cooling process, the external temperature of the steel coil drops below the internal temperature within 10-20 minutes, while the core temperature continues to rise due to thermal inertia, causing further expansion. This temperature range of 620°C coincides with the bonding period of the cold-rolled steel coil, and the resulting thermal stress increases the tendency for bonding. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide an annealing device for cold-rolled steel coils, which can realize the all-round cooling treatment of cold rolling and the heat preservation treatment of the outer periphery of cold rolling after annealing to reduce the temperature difference.
[0005] This utility model discloses an annealing device for cold-rolled steel coils, comprising an annealing furnace, a liquid storage tank at the upper end of the annealing furnace, a liquid storage cavity within the liquid storage tank, and a plurality of evenly arranged second nozzles at the lower end of the liquid storage cavity, the plurality of second nozzles penetrating the wall of the annealing furnace and being sealed and fixedly connected to the wall of the annealing furnace; a plurality of evenly arranged side connecting pipes at the outer ends of both sides of the liquid storage tank, the side connecting pipes penetrating the wall of the annealing furnace and being sealed and fixedly connected to the wall of the annealing furnace; a plurality of side nozzles at the inner cavity end of the plurality of side connecting pipes; and a heat preservation device at the outer side of the end of the annealing furnace near the discharge port.
[0006] As a further improvement of this utility model, a liquid receiving chamber is provided inside the liquid receiving box, and multiple liquid lowering grooves are provided through the wall surface of the upper end face of the liquid receiving box. The liquid lowering grooves are interconnected with the inner cavity of the annealing furnace. A cooling box is provided inside the liquid receiving chamber. A connecting pipe is provided at one end of the cooling box, and multiple first spray pipes are respectively connected to the other end of the connecting pipe. The multiple first spray pipes are provided through the wall of the annealing furnace and are fixedly and sealed to the wall of the annealing furnace.
[0007] As a further improvement of this utility model, a feed inlet is provided on one end of the annealing furnace, and a discharge outlet is provided on the corresponding end of the feed inlet; multiple sets of rollers are arranged opposite each other in the inner cavity of the annealing furnace, and the multiple sets of rollers are rotatably connected to the two end side walls of the annealing furnace; there is a gap between the multiple sets of rollers so that the gap forms a working transport line; the gap between the multiple sets of rollers is the same as the thickness of the transported material.
[0008] As a further improvement of this utility model, the outer shell of the cooling box is provided with a waterproof membrane; an air inlet pipe is provided on one side of the cooling box facing the outside of the liquid receiving tank, one end of the air inlet pipe is connected to the outside, and the other end of the air inlet pipe is connected to the inside of the cooling box; a drain pipe is provided on the side of the cooling box near the air inlet pipe, one end of the drain pipe is connected to the outside, and the other end of the drain pipe is connected to the cooling box.
[0009] As a further improvement of this utility model, multiple side nozzles are located in the gap between multiple oppositely arranged rollers, and the multiple side nozzles always face the work transport line; a return pipe is provided at one outer end of the liquid storage tank, one end of the return pipe is connected to the liquid storage chamber, and the other end of the return pipe is connected to the liquid receiving chamber; a return pump is also provided on the return pipe, and the return pump is used to pump the coolant in the liquid receiving chamber into the upper liquid storage chamber.
[0010] As a further improvement of this utility model, the heat preservation device is provided with heat preservation partitions at both the upper and lower ends, and the heat preservation partitions are aligned with the discharge port; the lower end of the heat preservation device is provided with multiple support members, and the support members are fixedly connected to the upper end of the heat preservation device.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] This utility model utilizes multiple side nozzles on both sides to cool the middle section of the cold-rolled roll during the annealing process, thereby reducing the overall temperature difference. Different cooling methods are employed at the top and bottom ends, and the coolant output from the top end for downward cooling can be recycled and reused. Finally, a heat preservation device installed outside the annealing furnace maintains the temperature of the outer periphery after annealing, further reducing the temperature difference between the center and outer periphery of the cold-rolled roll, thus minimizing the tendency for adhesion. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0014] Figure 2 This is a side view of the structure of this utility model;
[0015] Figure 3 This is a cross-sectional structural diagram of the annealing furnace of this utility model;
[0016] Figure 4 This is a front view cross-sectional structural diagram of the overall device of this utility model.
[0017] Explanation of the labels in the diagram:
[0018] Annealing furnace 1, feed inlet 11, roller 12, liquid receiving tank 2, liquid receiving chamber 21, liquid lowering tank 22, cooling tank 23, air inlet pipe 231, connecting pipe 232, first spray pipe 233, drain pipe 234, liquid storage tank 3, liquid storage chamber 31, second spray pipe 311, side connecting pipe 32, side nozzle 321, return pipe 33, return pump 331, heat preservation device 4, heat preservation partition 41, support component 42, cold rolling 5. Detailed Implementation
[0019] Specific Implementation Example 1: Please refer to... Figure 1-4 An annealing apparatus for cold-rolled steel coils includes an annealing furnace 1, located in the middle of an overall fixture. An inlet 11 is provided at one end of the annealing furnace 1, and an outlet is provided at the corresponding end of the inlet 11. Multiple sets of rollers 12 are arranged opposite each other within the inner cavity of the annealing furnace 1, and are rotatably connected to the side walls at both ends of the annealing furnace 1. A certain distance exists between the multiple sets of rollers 12 to form a conveying line. The distance between the multiple sets of rollers 12 is the same as the thickness of the conveyed material, allowing the conveyed material to enter the annealing furnace 1 from one end of the inlet 11 and exit from the other end of the outlet.
[0020] A liquid receiving tank 2 is provided at the lower end of the annealing furnace 1, and the liquid receiving tank 2 is fixedly connected to the annealing furnace 1. A liquid receiving cavity 21 is formed inside the liquid receiving tank 2, and multiple liquid discharge grooves 22 are formed through the upper end face of the liquid receiving tank 2, which are interconnected with the inner cavity of the annealing furnace 1. A cooling box 23 is provided on one side of the liquid receiving cavity 21. The outer shell of the cooling box 23 is covered with a waterproof membrane, and a condenser, compressor, etc., are installed inside the cooling box 23. The internal structure of the cooling box 23 is existing technology and will not be described in detail here. An air inlet pipe 231 is provided on one side of the cooling box 23 facing outward from the liquid receiving tank 2. One end of the air inlet pipe 231 is interconnected with the outside, and the other end of the air inlet pipe 231 is interconnected with the inside of the cooling box 23. A connecting pipe 232 is provided on the other side of the cooling box 23. The connecting pipe 232 is located inside the liquid receiving chamber 21. The other end of the connecting pipe 232 is connected to a plurality of first spray pipes 233. The plurality of first spray pipes 233 are disposed in the inner cavity of the annealing furnace 1 through the liquid receiving chamber 21 and are sealed and fixedly connected to the wall of the annealing furnace 1. A plurality of liquid drain tanks 22 are irregularly distributed on both sides of the plurality of first spray pipes 233. A drain pipe 234 is provided on the side of the cooling box 23 near the air inlet pipe 231. One end of the drain pipe 234 is connected to the outside, and the other end of the drain pipe 234 is connected to the cooling box 23.
[0021] A liquid storage tank 3 is provided at the upper end of the annealing furnace 1. The liquid storage tank 3 is fixedly connected to the annealing furnace 1 and is used to store coolant. A liquid storage cavity 31 is formed in the liquid storage tank 3. A plurality of evenly arranged second nozzles 311 are formed at the lower end of the liquid storage cavity 31. The plurality of second nozzles 311 pass through the liquid storage cavity 31 and are disposed in the inner cavity of the annealing furnace 1. The plurality of second nozzles 311 are fixedly and sealed to the wall of the annealing furnace 1. A plurality of evenly arranged side connecting pipes 32 are provided at the outer ends of both sides of the liquid storage tank 3. The plurality of side connecting pipes 32 all pass through the wall of the annealing furnace 1 and are fixedly and sealed to the wall of the annealing furnace 1. Multiple side connecting pipes 32 are located at the inner cavity end of the annealing furnace 1, and multiple side nozzles 321 are provided. The multiple side nozzles 321 are interconnected with the multiple side connecting pipes 32. The multiple side nozzles 321 are all located between multiple oppositely arranged rollers 12 so that the multiple side nozzles 321 can always face the work conveyor line. A return pipe 33 is provided at one outer end of the liquid storage tank 3. One end of the return pipe 33 is interconnected with the liquid storage cavity 31, and the other end of the return pipe 33 is interconnected with the liquid receiving cavity 21. A return pump 331 is also provided on the return pipe 33. The return pump 331 is used to pump the coolant in the liquid receiving cavity 21 into the upper liquid storage cavity 31.
[0022] A heat preservation device 4 is provided on the outer side of the annealing furnace 1 near the discharge port. Heat preservation baffles 41 are provided at both the upper and lower ends of the heat preservation device 4, and the baffles 41 are aligned with the discharge port to allow material exiting the discharge port to enter the heat preservation device 4. Multiple support members 42 are provided at the lower end of the heat preservation device 4, and the support members 42 are fixedly connected to the upper end of the heat preservation device 4.
[0023] The material transported between the rollers 12 is cold-rolled steel 5. When the cold-rolled steel 5 passes through the annealing furnace 1, the side nozzles 321 located near the side walls of the cold-rolled steel 5 are always directed towards the side ends of the cold-rolled steel 5 to cool it down, so that the side walls of the cold-rolled steel 5 are effectively cooled from the middle inward. When the cold-rolled steel 5 enters the heat preservation device 4, the heat preservation baffles 41 at the upper and lower ends keep the annealed cold-rolled steel 5 warm, so as to keep the temperature of the outer periphery of the cold-rolled steel 5 warm and prevent the temperature difference between the center and the outer periphery of the cold-rolled steel 5 from being too large.
[0024] Working principle:
[0025] In operation, the cold-rolled roll is first fed into the annealing furnace through the inlet and transported by rollers within the furnace. Simultaneously, during transport, the lower cooling tank cools the bottom of the cold-rolled roll through a first nozzle; coolant in the upper storage tank also cools the upper part of the roll through a second nozzle; multiple side nozzles on both sides of the annealing furnace cool the middle section of the cold-rolled roll. After annealing, the roll exits through the outlet and simultaneously enters a heat preservation device. This device controls the temperature of the outer periphery of the cold-rolled roll to prevent excessive temperature differences between the center and the outer periphery.
Claims
1. An annealing device for cold-rolled steel coils, comprising an annealing furnace (1) provided with a liquid storage tank (3) at the upper end; characterized in that: The liquid storage tank (3) is provided with a liquid storage cavity (31), and the lower end of the liquid storage cavity (31) is provided with a plurality of uniformly arranged second nozzles (311). The plurality of second nozzles (311) are arranged through the wall of the annealing furnace (1) and are sealingly and fixedly connected with the wall of the annealing furnace (1). The two side ends of the liquid storage tank (3) are provided with a plurality of uniformly arranged side connecting pipes (32). The side connecting pipes (32) are arranged through the wall of the annealing furnace (1) to the inside of the annealing furnace (1) and are sealingly and fixedly connected with the wall of the annealing furnace (1). The plurality of side connecting pipes (32) are provided with a plurality of side nozzles (321) at the inner cavity end of the annealing furnace (1). The outer side of one end of the annealing furnace (1) near the discharge port is provided with a heat preservation device (4).
2. An annealing installation for cold-rolled steel coils according to claim 1, characterized in that: The lower end of the annealing furnace (1) is provided with a liquid receiving tank (2), and the liquid receiving tank (2) is fixedly connected with the annealing furnace (1). The liquid receiving tank (2) is provided with a liquid receiving cavity (21) inside. The upper end surface of the liquid receiving tank (2) is provided with a plurality of liquid receiving grooves (22) through the wall surface. The liquid receiving grooves (22) are in communication with the inner cavity of the annealing furnace (1). The liquid receiving cavity (21) is provided with a cooling tank (23). One end of the cooling tank (23) is provided with a connecting pipe (232). The other end of the connecting pipe (232) is connected with a plurality of first spray pipes (233). The plurality of first spray pipes (233) are arranged through the wall of the annealing furnace (1) and are sealingly and fixedly connected with the wall of the annealing furnace (1).
3. An annealing installation for cold-rolled steel coils according to claim 1, characterized in that: One end side of the annealing furnace (1) is provided with a feeding port (11), and the corresponding end side of the feeding port (11) is provided with a discharge port. A plurality of groups of roller wheels (12) are arranged opposite to each other in the inner cavity of the annealing furnace (1). The plurality of groups of roller wheels (12) are rotatably connected with the two end walls of the annealing furnace (1). There is a spacing between the plurality of groups of roller wheels (12) to form a working transport line. The spacing between the plurality of groups of roller wheels (12) is the same as the thickness of the transported material.
4. The annealing installation for cold-rolled steel coils according to claim 2, characterized in that: The outer shell of the cooling tank (23) is provided with a waterproof film. One side of the cooling tank (23) is provided with an air inlet pipe (231) outside the liquid receiving tank (2). One end of the air inlet pipe (231) is in communication with the outside, and the other end of the air inlet pipe (231) is in communication with the inside of the cooling tank (23). One side end of the cooling tank (23) near the air inlet pipe (231) is provided with a drain pipe (234). One end of the drain pipe (234) is in communication with the outside, and the other end of the drain pipe (234) is in communication with the cooling tank (23).
5. The annealing installation for cold-rolled steel coils according to claim 1, characterized in that: A plurality of side nozzles (321) are located in the interval between a plurality of oppositely arranged roller wheels (12), and the plurality of side nozzles (321) are always directed towards the operation transport line; one side of the liquid storage tank (3) is provided with a reflux pipe (33), one end of the reflux pipe (33) is in communication with the liquid storage cavity (31), and the other end of the reflux pipe (33) is in communication with the liquid receiving cavity (21); the reflux pipe (33) is further provided with a reflux pump (331), and the reflux pump (331) is used to draw the coolant in the liquid receiving cavity (21) into the upper end liquid storage cavity (31).
6. An annealing installation for cold-rolled steel coils according to claim 3, characterized in that: The heat preservation device (4) is provided with heat preservation partitions (41) at the upper end and the lower end, and the heat preservation partitions (41) are aligned with the discharge port; the lower end of the heat preservation device (4) is provided with a plurality of supporting pieces (42), and the supporting pieces (42) are fixedly connected with the heat preservation device (4) at the upper end.