A continuous annealing apparatus for cold-rolled steel strip

Abstract

The present application relates to the field of cold-rolled strip continuous annealing, in particular to a cold-rolled strip continuous annealing equipment, comprising a high-temperature box body; a feeding port and a discharging port are respectively arranged at two ends of the high-temperature box body; a plurality of transmission rollers are rotationally connected in the high-temperature box body; the transmission rollers are arranged in an up-and-down staggered manner; a first motor is fixedly connected to a side wall of one end of the high-temperature box body; an output end of the first motor is fixedly connected with one of the transmission rollers; a transmission assembly is arranged between adjacent two transmission rollers; the strip steel sequentially passes through the up-and-down staggered transmission rollers, so that the strip steel is arranged in a wave shape in the high-temperature box body; in the same size high-temperature box body, the wave-shaped arranged strip steel is longer than the horizontally arranged strip steel, and more strip steels can be annealed at one time; the first motor makes all the transmission rollers rotate simultaneously and in the same direction through the transmission assembly, so that the annealed strip steel moves to the discharging port, and the strip steel to be annealed enters the high-temperature box body for annealing.

Description

Technical Field

[0001] This invention relates to the field of continuous annealing technology for cold-rolled strip steel, and in particular to a continuous annealing equipment for cold-rolled strip steel. Background Technology

[0002] Annealing is a metal heat treatment process in which metal is slowly heated to a certain temperature, held for a sufficient time, and then cooled in the furnace. Annealing can improve the plasticity of metal, eliminate residual internal stress, and change the hardness of metal. Usually, when customers need strip steel with lower hardness, the strip steel will be annealed to reduce the hardness of the strip steel.

[0003] Chinese patent CN202222694146.3 discloses a continuous annealing device for strip steel. By setting a transmission roller, the strip steel passes through the heating box in a horizontal state, and an electric heater is set on the top of the heating box to make the upper and lower surfaces of the strip steel heat evenly.

[0004] However, during annealing, slow heating is required to ensure a sufficiently long heating time. In the process of strip steel production, since the strip steel is very long, heating it segment by segment in sequence would take a long time. If multiple segments of more strip steel are heated simultaneously, a larger heating box is required, which would occupy a lot of space. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention provides a continuous annealing equipment for cold-rolled strip steel, including a high-temperature chamber; the high-temperature chamber has an inlet and an outlet at its two ends respectively; a plurality of drive rollers are rotatably connected inside the high-temperature chamber; the drive rollers are arranged alternately vertically; a first motor is fixedly connected to one side wall of the high-temperature chamber; the output end of the first motor is fixedly connected to one of the drive rollers; a transmission assembly is provided between two adjacent drive rollers; the transmission assembly is used for transmission between the two drive rollers; the transmission assembly is located on both sides of the high-temperature chamber.

[0007] In one embodiment of the present invention, the transmission assembly includes a pulley and a belt, and the two transmission rollers are respectively fixedly connected to a pulley; the pulleys are driven by the belt.

[0008] In one embodiment of the present invention, a first heat insulation plate and a second heat insulation plate are fixedly connected inside the high-temperature chamber; the first heat insulation plate and the second heat insulation plate are arranged in parallel on the upper and lower sides of a plurality of transmission rollers; a heating tube is fixedly connected to the side of the first heat insulation plate and the second heat insulation plate adjacent to the transmission rollers.

[0009] In one embodiment of the present invention, adjusting components are respectively provided on both sides of the high-temperature chamber; the adjusting components are used to adjust the size of the discharge port and the inlet port; the adjusting components include material gates; material gates are slidably connected to both sides of the high-temperature chamber; racks are fixedly connected to both ends of the material gates; the racks are respectively located on both sides of the high-temperature chamber; gears are rotatably connected to both sides of the high-temperature chamber; the gears mesh with the racks; a first rotating shaft is fixedly connected between the two gears; the first rotating shaft is rotatably connected to the high-temperature chamber; a second motor is provided on one side of the high-temperature chamber, and the second motor is fixedly connected to the high-temperature chamber via a fixing plate; the output end of the second motor is fixedly connected to one end of the first rotating shaft;

[0010] In one embodiment of the present invention, a cleaning assembly is provided on the side of the high-temperature chamber near the feed inlet; the cleaning assembly is used to clean impurities on the upper and lower surfaces of the strip; the cleaning assembly includes an upper cleaning roller and a lower cleaning roller; the upper and lower cleaning rollers are located on the upper and lower sides of the strip and respectively contact the upper and lower surfaces of the strip; the upper cleaning roller is rotatably connected to the material gate via a first fixing plate; the lower cleaning roller is rotatably connected to the high-temperature chamber via a second fixing plate;

[0011] In one embodiment of the present invention, a protective gas box is fixedly connected to one side of the high-temperature chamber; two gas guiding components are provided inside the protective gas box and the high-temperature chamber; the gas guiding components are respectively located above and below one of the transmission rollers, and between the first heat insulation plate and the second heat insulation plate; the gas guiding components are used to guide gas from the protective gas box into the high-temperature chamber.

[0012] In one embodiment of the present invention, the air guiding assembly includes an air vent; one end of the air vent is connected to a protective gas box, and the other end of the air vent is connected to a high-temperature box; the air vent is located above and below one of the transmission rollers, and between the first heat insulation plate and the second heat insulation plate.

[0013] In one embodiment of the present invention, the air guiding assembly further includes a second rotating shaft; both ends of the second rotating shaft are rotatably connected to the side wall of the high-temperature chamber; the second rotating shaft is arranged parallel to the transmission roller; the second rotating shaft is located on one side of the vent pipe; and a plurality of fan blades are fixedly connected at equal intervals on the second rotating shaft.

[0014] In one embodiment of the present invention, the second rotating shaft and the vent pipe are located at one end of the high-temperature chamber; the air guiding assembly further includes a third rotating shaft; the third rotating shaft is located between the second rotating shaft and one of the material gates; a plurality of rotating plates are fixedly connected to the third rotating shaft; the third rotating shaft and the second rotating shaft are driven by a belt and a pulley; the belt and pulley are located on one side of the high-temperature chamber;

[0015] In one embodiment of the present invention, the transmission roller includes a shaft core and a bushing; the bushing is located outside the shaft core; a first fixing assembly is disposed between the bushing and the shaft core; the first fixing assembly is located at both ends of the bushing; the first fixing assembly includes a plurality of first bolts; the bushing and the shaft core are fixed by the plurality of first bolts; the first bolts are arranged in a circumferential array.

[0016] In one embodiment of the present invention, the transmission roller further includes a fixing ring; the fixing ring is fixedly connected to the side of the bushing and the shaft core respectively by a second bolt; the second bolt is arranged in a circumferential array.

[0017] The technical solution of the present invention has the following advantages over the prior art:

[0018] In order to allow more strip steel to be annealed in a high-temperature chamber of the same size, the strip steel passes sequentially around staggered drive rollers, so that the strip steel is arranged in a wavy pattern in the high-temperature chamber. In a high-temperature chamber of the same size, the strip steel arranged in a wavy pattern is longer than the strip steel arranged horizontally, thus improving the annealing efficiency. By starting the first motor, the first motor causes all the drive rollers to rotate simultaneously in the same direction through the belt and pulley, so that the strip steel that has been annealed in the high-temperature chamber moves towards the discharge port. The strip steel to be annealed enters the high-temperature chamber with the drive rollers for annealing.

[0019] In order to remove impurities from the upper and lower surfaces of the strip steel entering the high-temperature chamber, the present invention provides an upper cleaning roller and a lower cleaning roller on one side of the feed inlet. The roller surfaces of the upper and lower cleaning rollers are made of sticky rubber material, which can adhere to impurities on the surface of the strip steel, so that the surface of the strip steel is free of impurities when it enters the feed inlet. When the thickness of the strip steel to be annealed changes, the second motor drives the material gate to adjust the height, and the upper cleaning roller rises and falls with the material gate to adjust the height, so that the upper and lower cleaning rollers can be used for strip steel of various thicknesses.

[0020] In order to make the nitrogen-hydrogen protective gas flowing out through the vent pipe flow along the width direction of the strip, the nitrogen-hydrogen protective gas flowing out of the vent pipe forms an airflow that blows onto the fan blade at the end closest to the vent pipe, causing the fan blade to move. The second rotating shaft rotates with the movement of the fan blade, causing all the fan blades to rotate together. When the fan blades rotate, an airflow guide is generated around the second rotating shaft, and the nitrogen-hydrogen protective gas moves in the direction of the second rotating shaft, so that the width direction of the strip is filled with nitrogen-hydrogen protective gas. Attached Figure Description

[0021] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the main structure of one embodiment of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the main structure of one embodiment of the present invention. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of the main structure of an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the transmission roller and strip steel structure according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the transmission roller, transmission assembly, and first motor structure according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the first heat insulation plate, the second heat insulation plate, and the heating tube according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a first heat insulation plate, a second heat insulation plate, a heating tube, a transmission roller, and a strip steel structure according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the adjustment component structure according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of a partial air-guiding component structure according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of a portion of the ventilation pipe and protective gas box structure according to an embodiment of the present invention;

[0032] Figure 11 This is an exploded view of the transmission roller structure according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the instruction manual:

[0034] 1. High-temperature chamber; 2. Transmission roller; 21. Shaft core; 22. Bushing; 23. Fixing ring; 3. First motor; 4. Transmission assembly; 5. First heat insulation plate; 6. Second heat insulation plate; 7. Heating tube; 8. Adjustment assembly; 81. Material gate; 82. Rack; 83. Gear; 84. First rotating shaft; 85. Second motor; 86. Upper cleaning roller; 87. Lower cleaning roller; 9. Protective gas chamber; 101. Vent pipe; 102. Second rotating shaft; 103. Fan blade. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0036] Reference Figures 1-5 As shown, a continuous annealing equipment for cold-rolled strip steel includes a high-temperature chamber 1; the high-temperature chamber 1 has an inlet and an outlet at its two ends respectively; a plurality of drive rollers 2 are rotatably connected inside the high-temperature chamber 1; the drive rollers 2 are arranged alternately vertically; a first motor 3 is fixedly connected to one side wall of the high-temperature chamber 1; the output end of the first motor 3 is fixedly connected to one of the drive rollers 2; a transmission assembly 4 is provided between two adjacent drive rollers 2; the transmission assembly 4 is used for transmission between the two drive rollers 2; the transmission assembly 4 is located on both sides of the high-temperature chamber 1; the transmission assembly 4 includes a pulley and a belt, and the two drive rollers 2 are fixedly connected to a pulley respectively; the pulleys are driven by the belt.

[0037] To allow more strip steel to be annealed within the same size high-temperature chamber 1, the strip steel enters from the feed inlet of the high-temperature chamber 1, passes sequentially around the staggered drive rollers 2, and exits from the discharge outlet of the high-temperature chamber 1, resulting in a wavy arrangement of the strip steel within the high-temperature chamber 1. Within the same size high-temperature chamber 1, the wavy strip steel is longer than the horizontally arranged strip steel, increasing the length and area of ​​strip steel that can be annealed at the same time, thus improving annealing efficiency. By starting the first motor 3, the first motor 3 causes all the drive rollers 2 to rotate simultaneously in the same direction via a belt and pulley, causing the annealed strip steel in the high-temperature chamber 1 to move towards the discharge outlet. The strip steel to be annealed then enters the high-temperature chamber 1 with the drive rollers 2 for annealing.

[0038] Reference Figure 3 , Figure 6 , Figure 7 As shown, in one embodiment of the present invention, a first heat insulation plate 5 and a second heat insulation plate 6 are fixedly connected inside the high-temperature chamber 1; the first heat insulation plate 5 and the second heat insulation plate 6 are arranged in parallel on the surface of a plurality of transmission rollers 2; a heating tube 7 is fixedly connected to one side of the first heat insulation plate 5 and the second heat insulation plate 6 adjacent to the transmission rollers 2.

[0039] To address the issue of uniform heating of the strip steel within the high-temperature chamber 1, a first heat insulation plate 5 and a second heat insulation plate 6 are respectively installed on the upper and lower sides of the strip steel. These plates are M-shaped and arranged parallel to the strip steel, ensuring that the distances between the upper and lower surfaces of the strip steel and the first and second heat insulation plates 5 and 6 are equal. This allows the heating tubes 7 on the first and second heat insulation plates 5 and 6 to uniformly heat the upper and lower surfaces of each strip steel section, preventing uneven heating from affecting the annealing quality. The first and second heat insulation plates 5 and 6 also divide the high-temperature chamber 1 into three parts. The part above the first heat insulation plate 5 and below the second heat insulation plate 6 within the high-temperature chamber 1 serves as an insulation layer, reducing heat loss from the heating tubes 7.

[0040] Reference Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, adjustment components 8 are respectively provided on both sides of the high-temperature chamber 1; the adjustment components 8 are used to adjust the size of the discharge port and the inlet port; the adjustment components 8 include a material gate 81; the material gate 81 is slidably connected to both sides of the high-temperature chamber 1; racks 82 are fixedly connected to both ends of the material gate 81; the racks 82 are located on both sides of the high-temperature chamber 1; gears 83 are rotatably connected to both sides of the high-temperature chamber 1; the gears 83 are meshed with the racks 82; a first rotating shaft 84 is fixedly connected between the two gears 83; the first rotating shaft 84 is rotatably connected to the high-temperature chamber 1; a second motor 85 is provided on one side of the high-temperature chamber 1, and the second motor 85 is fixedly connected to the high-temperature chamber 1 via a fixing plate; the output end of the second motor 85 is fixedly connected to one end of the first rotating shaft 84;

[0041] To reduce heat loss from the discharge and inlet ports on both sides of the high-temperature chamber 1, the second motor 85 is started. The output of the second motor 85 drives the first rotating shaft 84 to rotate. The first rotating shaft 84 drives two gears 83 to rotate, and the gears 83 drive the rack 82 to move, so that the second motor 85 can adjust the height of the material gate 81. The height of the discharge and inlet ports is slightly greater than the thickness of the strip steel, so that the strip steel can pass through the inlet and discharge ports smoothly. At the same time, the gap between the inlet and discharge ports is very small, making it difficult for heat to flow out from the gap, thus reducing heat loss.

[0042] Reference Figure 1 , Figure 3 and Figure 8As shown, a cleaning assembly is provided on the side of the high-temperature chamber 1 near the feed inlet; the cleaning assembly is used to clean impurities on the upper and lower surfaces of the strip steel; the cleaning assembly includes an upper cleaning roller 86 and a lower cleaning roller 87; the upper cleaning roller 86 and the lower cleaning roller 87 are located on the upper and lower sides of the strip steel and respectively contact the upper and lower surfaces of the strip steel; the upper cleaning roller 86 is rotatably connected to the material gate 81 via a first fixed plate; the lower cleaning roller 87 is rotatably connected to the high-temperature chamber 1 via a second fixed plate;

[0043] To remove impurities from the upper and lower surfaces of the strip steel entering the high-temperature chamber 1, an upper cleaning roller 86 and a lower cleaning roller 87 are installed on one side of the feed inlet. The roller surfaces of the upper cleaning roller 86 and the lower cleaning roller 87 are made of sticky rubber material, which can adhere to impurities on the surface of the strip steel, so that the surface of the strip steel is free of impurities when it enters the feed inlet. When the thickness of the strip steel to be annealed is different, the second motor 85 drives the material gate 81 to adjust the height, and the upper cleaning roller 86 rises and falls with the material gate 81 to adjust the height. The upper cleaning roller 86 and the lower cleaning roller 87 can be used for strip steel of various thicknesses. The first fixing plate and the second fixing plate are fixedly connected to the material gate 81 and the high-temperature chamber 1, respectively.

[0044] Reference Figure 1 , Figure 2 , Figure 3 and Figure 10 As shown, a protective gas box 9 is fixedly connected to one side of the high-temperature chamber 1; two gas guiding components are arranged inside the protective gas box 9 and the high-temperature chamber 1; the gas guiding components are respectively located above and below one of the transmission rollers 2, and are located between the first heat insulation plate 5 and the second heat insulation plate 6; the gas guiding components are used to guide gas from the protective gas box 9 into the high-temperature chamber 1; the gas guiding components include a vent pipe 101; one end of the vent pipe 101 is connected to the protective gas box 9, and the other end of the vent pipe 101 is connected to the high-temperature chamber 1; the vent pipe 101 is respectively located above and below one of the transmission rollers 2, and is located between the first heat insulation plate 5 and the second heat insulation plate 6;

[0045] To prevent the strip steel inside the high-temperature chamber 1 from being oxidized by oxygen in the air at high temperatures, thus affecting the quality of the strip steel, the air inside the high-temperature chamber 1 expands due to the gradual increase in temperature, its density decreases, and the air pressure inside the high-temperature chamber 1 increases. The air inside the high-temperature chamber 1 is discharged from the gap between the feed port and the discharge port. A control valve is connected inside the vent pipe 101. When the control valve is opened, the nitrogen-hydrogen protective gas in the protective gas box 9 flows to the high-temperature chamber 1 through the vent pipe 101. The nitrogen-hydrogen protective gas in the high-temperature chamber 1 gradually fills the space between the first heat insulation plate 5 and the second heat insulation plate 6, and discharges the air from the gap between the discharge port and the feed port, preventing the air from contacting the strip steel and causing an oxidation reaction.

[0046] Reference Figure 3 and Figure 9 As shown, the air guiding assembly also includes a second rotating shaft 102; both ends of the second rotating shaft 102 are rotatably connected to the side wall of the high-temperature chamber 1; the second rotating shaft 102 is arranged parallel to the transmission roller 2; the second rotating shaft 102 is located on one side of the vent pipe 101; a plurality of fan blades 103 are fixedly connected at equal intervals on the second rotating shaft 102.

[0047] In order to make the nitrogen-hydrogen protective gas flowing out through the vent pipe 101 flow along the width direction of the strip, the nitrogen-hydrogen protective gas flowing out from the vent pipe 101 forms an airflow, which blows onto one end of the fan blade 103 closest to the vent pipe 101, causing the fan blade 103 to rotate. An airflow guide is generated around the second rotating shaft 102, and the nitrogen-hydrogen protective gas moves with the direction of the second rotating shaft 102, so that the width direction of the strip is filled with nitrogen-hydrogen protective gas.

[0048] Reference Figure 4 , Figure 5 and Figure 11 As shown, the transmission roller 2 includes a shaft core 21 and a bushing 22; the bushing 22 is located outside the shaft core 21; a first fixing assembly is provided between the bushing 22 and the shaft core 21; the first fixing assembly is located at both ends of the bushing 22; the first fixing assembly includes a plurality of first bolts; the bushing 22 and the shaft core 21 are fixed together by a plurality of first bolts; the first bolts are arranged in a circumferential array.

[0049] Reference Figure 4 , Figure 5 and Figure 11 As shown, the transmission roller 2 also includes a fixing ring 23; the fixing ring 23 is fixedly connected to the side of the bushing 22 and the shaft core 21 respectively by a second bolt; the second bolt is arranged in a circumferential array;

[0050] To prevent relative displacement between the shaft core 21 and the bushing 22 after thermal expansion, the first bolt, the second bolt, the retaining ring 23, the shaft core 21, and the bushing 22 are made of the same material, ensuring that they have the same amount of expansion as the carbon sleeve roller core under high temperature. The ends of the shaft core 21 and the bushing 22 are fixed by using multiple first bolts to increase the contact area between the bolts and the shaft core 21 and the bushing 22. Then, the retaining ring 23 and the second bolt are used to fix the bushing 22 and the shaft core 21 from the sides, so that the shaft core 21 and the bushing 22 are fixed in multiple directions and do not produce relative displacement.

[0051] Working principle:

[0052] Before operation, the second motor 85 is started, and its output drives the first rotating shaft 84 to rotate. The first rotating shaft 84 drives two gears 83 to rotate, and the gears 83 drive the rack 82 to move, allowing the second motor 85 to adjust the height of the material gate 81. This ensures that the height of the discharge port and the feed port is slightly greater than the thickness of the strip, allowing the strip to pass smoothly through the feed port and discharge port. Simultaneously, the gap between the feed port and the discharge port is very small, making it difficult for heat to escape and reducing heat loss. To remove impurities from the upper and lower surfaces of the strip steel entering the high-temperature chamber 1, an upper cleaning roller 86 and a lower cleaning roller 87 are provided on one side of the feed inlet. The roller surfaces of the upper cleaning roller 86 and the lower cleaning roller 87 are made of sticky rubber material, which can adhere to impurities on the surface of the strip steel, so that the surface of the strip steel is free of impurities when it enters the feed inlet. When the thickness of the strip steel to be annealed is different, the upper cleaning roller 86 is raised and lowered together with the material gate 81 to adjust its height, so that the upper cleaning roller 86 and the lower cleaning roller 87 can be used for strip steel of various thicknesses.

[0053] During operation, the strip steel enters through the feed inlet of the high-temperature chamber 1, passes sequentially around the staggered transmission rollers 2, and exits through the discharge outlet of the high-temperature chamber 1, resulting in a wavy arrangement of the strip steel within the high-temperature chamber 1. Within a high-temperature chamber 1 of the same size, the wavy strip steel is longer than the horizontally arranged strip steel, increasing the length and area of ​​the strip steel that can be annealed simultaneously, thus improving annealing efficiency. By installing a first heat insulation plate 5 and a second heat insulation plate 6 on the upper and lower sides of the strip steel, respectively, and with the first heat insulation plate 5 and the second heat insulation plate 6 arranged parallel to the strip steel, the upper and lower surfaces of the strip steel are respectively aligned with... The distance between the first heat insulation plate 5 and the second heat insulation plate 6 is equal, ensuring that the upper and lower surfaces of each strip steel section can be uniformly heated by the heating tubes 7 on the first and second heat insulation plates 5 and 6, preventing uneven heating from affecting the annealing quality. The first heat insulation plate 5 and the second heat insulation plate 6 isolate the high-temperature chamber 1 into three parts. The area above the first heat insulation plate 5 and below the second heat insulation plate 6 inside the high-temperature chamber 1 serves as an insulation layer, reducing heat loss from the heating tubes 7. As the temperature in the high-temperature chamber 1 gradually increases, the air in the high-temperature chamber 1 expands due to heat, its density decreases, and the air pressure in the high-temperature chamber 1 increases. The gas is discharged from the gap between the feed inlet and the discharge outlet. A control valve is connected inside the vent pipe 101. When the control valve is opened, the nitrogen-hydrogen protective gas in the protective gas box 9 flows through the vent pipe 101 to the high-temperature box 1. The nitrogen-hydrogen protective gas in the high-temperature box 1 gradually fills the space between the first heat insulation plate 5 and the second heat insulation plate 6, forcing air out from the gap between the discharge outlet and the feed inlet, preventing air from contacting the strip steel and causing an oxidation reaction. To ensure that the nitrogen-hydrogen protective gas flowing out through the vent pipe 101 flows along the width of the strip steel, the nitrogen-hydrogen protective gas flowing out of the vent pipe 101 forms an airflow that blows onto the fan blade 1 closest to the vent pipe 101. On one end of the fan blade, the fan blade moves, and the second rotating shaft 102 rotates with the movement of the fan blade, causing all the fan blades 103 to rotate together. When the fan blades 103 rotate, airflow is generated around the second rotating shaft 102. The nitrogen-hydrogen protective gas moves with the direction of the second rotating shaft 102, filling the width direction of the strip with nitrogen-hydrogen protective gas. By starting the first motor 3, the first motor 3 causes all the transmission rollers 2 to rotate simultaneously in the same direction through the belt and pulley, causing the strip that has been annealed in the high-temperature chamber 1 to move towards the discharge port. The strip to be annealed enters the high-temperature chamber 1 with the transmission rollers 2 for annealing.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A continuous annealing installation for cold-rolled strip steel, characterized in that: The system includes a high-temperature chamber (1); the high-temperature chamber (1) has an inlet and an outlet at its two ends; several transmission rollers (2) are rotatably connected inside the high-temperature chamber (1); the transmission rollers (2) are arranged alternately up and down; a first motor (3) is fixedly connected to one side wall of the high-temperature chamber (1); the output end of the first motor (3) is fixedly connected to one of the transmission rollers (2); a transmission assembly (4) is provided between two adjacent transmission rollers (2); the transmission assembly (4) is used for transmission between the two transmission rollers (2); the transmission assembly (4) is located on both sides of the high-temperature chamber (1); The transmission assembly (4) includes a pulley and a belt, and the transmission roller (2) is fixedly connected to the pulley; the pulleys are driven by the belt. The strip enters from the feed port of the high-temperature box (1), passes through the upper and lower interlaced drive rollers (2) in sequence, and exits from the discharge port of the high-temperature box (1), so that the strip is arranged in a wave-like pattern inside the high-temperature box (1); by starting the first motor (3), the first motor (3) causes all the drive rollers (2) to rotate in the same direction at the same time through the belt and pulley; The high-temperature chamber (1) is fixedly connected with a first heat insulation plate (5) and a second heat insulation plate (6); the first heat insulation plate (5) and the second heat insulation plate (6) are arranged in parallel on the upper and lower sides of the multiple transmission rollers (2); a heating tube (7) is fixedly connected to the side of the first heat insulation plate (5) and the second heat insulation plate (6) adjacent to the transmission rollers (2). The first heat insulation plate (5) and the second heat insulation plate (6) are M-shaped and arranged parallel to the strip steel, so that the upper and lower surfaces of the strip steel are equidistant from the first heat insulation plate (5) and the second heat insulation plate (6), respectively. The first heat insulation plate (5) and the second heat insulation plate (6) separate the high temperature box (1) into three parts. The high temperature box (1) is located above the first heat insulation plate (5) and below the second heat insulation plate (6) as a heat insulation layer.

2. A continuous annealing installation for cold-rolled steel strips according to claim 1, characterized in that: Adjustment components (8) are respectively provided on both sides of the high-temperature chamber (1); the adjustment components (8) are used to adjust the size of the discharge port and the inlet port; the adjustment components (8) include a material gate (81); the material gate (81) is slidably connected to both sides of the high-temperature chamber (1); the two ends of the material gate (81) are respectively fixedly connected to racks (82); the racks (82) are respectively located on both sides of the high-temperature chamber (1); gears (83) are rotatably connected to both sides of the high-temperature chamber (1); the gears (83) are meshed with the racks (82); a first rotating shaft (84) is fixedly connected between the two gears (83); the first rotating shaft (84) is rotatably connected to the high-temperature chamber (1); a second motor (85) is provided on one side of the high-temperature chamber (1), the second motor (85) is fixedly connected to the high-temperature chamber (1) via a fixing plate; the output end of the second motor (85) is fixedly connected to one end of the first rotating shaft (84).

3. The continuous annealing equipment for cold-rolled strip steel according to claim 2, characterized in that: A cleaning assembly is provided on the side of the high-temperature chamber (1) near the feed inlet; the cleaning assembly is used to clean impurities on the upper and lower surfaces of the strip steel; the cleaning assembly includes an upper cleaning roller (86) and a lower cleaning roller (87); the upper cleaning roller (86) and the lower cleaning roller (87) are located on the upper and lower sides of the strip steel and respectively contact the upper and lower surfaces of the strip steel; the upper cleaning roller (86) is rotatably connected to the material gate (81) via a first fixed plate; the lower cleaning roller (87) is rotatably connected to the high-temperature chamber (1) via a second fixed plate.

4. The continuous annealing equipment for cold-rolled strip steel according to claim 3, characterized in that: A protective gas box (9) is fixedly connected to one side of the high-temperature chamber (1); two gas guiding components are provided inside the protective gas box (9) and the high-temperature chamber (1); the gas guiding components are located above and below one of the transmission rollers (2), and between the first heat insulation plate (5) and the second heat insulation plate (6); the gas guiding components are used to guide gas from the protective gas box (9) into the high-temperature chamber (1).

5. The continuous annealing equipment for cold-rolled strip steel according to claim 4, characterized in that: The air guiding assembly includes an air vent (101); one end of the air vent (101) is connected to the protective gas box (9), and the other end of the air vent (101) is connected to the high temperature box (1); the air vent (101) is located above and below one of the transmission rollers (2), and is located between the first heat insulation plate (5) and the second heat insulation plate (6).

6. The continuous annealing equipment for cold-rolled strip steel according to claim 5, characterized in that: The air guiding assembly also includes a second rotating shaft (102); the two ends of the second rotating shaft (102) are rotatably connected to the side wall of the high temperature chamber (1); the second rotating shaft (102) is arranged parallel to the transmission roller (2); the second rotating shaft (102) is located on one side of the air pipe (101); a number of fan blades (103) are fixedly connected at equal intervals on the second rotating shaft (102).

7. The continuous annealing equipment for cold-rolled strip steel according to claim 6, characterized in that: The transmission roller (2) includes a shaft core (21) and a bushing (22); the bushing (22) is located outside the shaft core (21); a first fixing component is provided between the bushing (22) and the shaft core (21); the first fixing component is located at both ends of the bushing (22); the first fixing component includes a plurality of first bolts; the bushing (22) and the shaft core (21) are fixed by a plurality of first bolts; the first bolts are arranged in a circumferential array.

8. The continuous annealing equipment for cold-rolled strip steel according to claim 7, characterized in that: The transmission roller (2) also includes a fixing ring (23); the fixing ring (23) is fixedly connected to the side of the bushing (22) and the shaft core (21) respectively by a second bolt; the second bolt is arranged in a circumferential array.

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