Cold rolling mill capable of automatically cleaning steel belt

Abstract

The invention relates to the field of steel strip cold rolling, in particular to a cold rolling mill capable of automatically cleaning a steel strip. According to an existing cold rolling device, dirt on the surface of a rolled steel strip is inconvenient to clean in the rolling process, dirt is easily mixed in the steel strip rolling process, the surface of the steel strip is inconvenient to level, and scraped oil dirt is easily accumulated when the conveying speed of the steel strip is changed. A cold rolling mill capable of automatically cleaning a steel belt comprises a bottom plate and the like. Roller frames are fixedly connected to the two sides of the bottom plate correspondingly, a winding auxiliary assembly is arranged on one side of one roller frame, and four straight rods are fixedly connected to the bottom plate. An operator firstly places a steel strip coil needing cold rolling on one of the roller frames close to the first straight plate, then pulls the steel strip to the position between the first driving roller and the first driven roller, the motor is started to drive the first driving roller and the second driving roller to conduct cold rolling on the steel strip, and the surface of the cold-rolled steel strip is cleaned through the wiping strip; and dirt is not easy to remain on the surface of the steel belt.

Description

Technical Field

[0001] This invention relates to the field of cold rolling of steel strip, and more particularly to a cold rolling mill for automatically cleaning steel strip. Background Technology

[0002] Steel strip is a type of steel with huge output, wide application and many varieties. In order to make the steel strip more compact and improve its mechanical properties, cold rolling process is usually used to process the steel strip, so as to make the steel strip surface smoother and the strength performance higher.

[0003] However, existing cold rolling equipment is not convenient for cleaning the surface of the rolled steel strip during the rolling process, which easily causes dirt to be mixed in when the steel strip is wound up. It is also not convenient to level the surface of the steel strip, and when the steel strip conveying speed changes, the scraped oil stains are easy to accumulate. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic steel strip cleaning cold rolling mill that facilitates cleaning and leveling of the steel strip surface, making it less prone to dirt getting trapped during steel strip winding, and can clean oil stains on the roll surface and change the oil discharge speed according to the steel strip conveying speed, thereby improving the cold rolling efficiency of the roll.

[0005] An automatic cleaning cold rolling mill for steel strip includes a base plate, with roller frames fixedly connected to both sides of the base plate. A winding auxiliary component is provided on one side of one of the roller frames. Four straight rods are fixedly connected to the base plate, with two straight rods forming a group. A guide roller is rotatably connected between the two straight rods in each group. A cold rolling mechanism is provided in the middle of the base plate for cold rolling the steel strip. A cleaning mechanism is provided on the base plate for cleaning the surface of the cold-rolled steel strip.

[0006] To further explain, the winding auxiliary assembly includes a bent rod, a swing frame, an electric wheel, and a torsion spring. The bent rod is fixedly connected to one of the roller frames, and the swing frame is rotatably connected to the bent rod. A torsion spring connects the swing frame and the bent rod, and the electric wheel is rotatably connected to the side of the bent rod away from the swing frame.

[0007] To further explain, the cold rolling mechanism includes two straight plates, which are fixedly connected to the base plate. Two straight plates are fixedly connected to the base plate. An active roller is rotatably connected between the two straight plates, and a passive roller is rotatably connected between the two straight plates. An active roller is rotatably connected between the two straight plates, and a passive roller is rotatably connected between the two straight plates. A motor is fixedly connected to one side of each of the straight plates, and one end of each of the active rollers is connected to the output shaft of the two motors.

[0008] To further explain, the cleaning mechanism includes a support rod, which is fixedly connected to the base plate. Two slide rails are fixedly connected to one side of the support rod, and wiping strips are slidably connected to both slide rails. A magnet is fixedly connected to the side of each wiping strip near the support rod, and the magnet is in contact with the support rod.

[0009] Further explanation: It also includes two support rods, which are fixedly connected to the side of the base plate near the straight plate. A guide frame is slidably connected between the two support rods. Several serrated shovels are fixedly connected to the side of the guide frame away from the straight plate. A slanted groove ring is fixedly connected to the central shaft of the active roller. One end of the guide frame is located in the curved groove on the slanted groove ring. Several leveling rollers are rotatably connected to the side of the guide frame away from the straight plate.

[0010] Further explanation: The system also includes a scraping assembly, which is disposed on the first and second straight plates. The scraping assembly is used to scrape off oil stains from the first and second active rollers. The scraping assembly includes two inclined scraper frames, which are respectively fixedly connected between the first and second straight plates. The two inclined scraper frames are in contact with the first and second active rollers, respectively. A sludge storage box is fixedly connected to the lower part of each inclined scraper frame, and a guide tube is fixedly connected to one side of each sludge storage box. Two sludge collection tanks are placed on the side of the base plate near the guide tube, and filter screens are fixedly connected to both sludge storage boxes.

[0011] To further explain, it also includes two filters, each of which is fixedly connected to one of the two sludge storage boxes.

[0012] Further explanation: It also includes an anti-clogging mechanism, which is disposed on the first straight plate and the second straight plate. The anti-clogging mechanism is used to move the filter residue on the filter screen. The anti-clogging mechanism includes two support frames, which are respectively fixedly connected to the upper part of the first straight plate and the second straight plate. A sliding frame is slidably connected between the two support frames. A connecting rod is fixedly connected to the side of the sliding frame near the guide frame. Two inclined groove frames are fixedly connected to the sliding frame. A sweeping frame is slidably connected to each inclined scraper frame. A brush plate is connected to the lower part of each sweeping frame through a hinge. The upper end of each sweeping frame passes through the inclined groove on the inclined groove frame.

[0013] Further explanation: It also includes two spiral plates, which are rotatably connected to the two conduits respectively. One of the support rods is fixedly connected to the side of the straight plate one near the motor, and the other support rod is fixedly connected to the side of the straight plate two near the motor. Contact wheels are rotatably connected to both support rods, and both contact wheels are in contact with the output shaft of the motor. A transmission assembly is connected between the contact wheels and the spiral plates.

[0014] To further explain, the transmission assembly includes a first pulley, a second pulley, and a transmission belt. The first pulley is fixedly connected to the contact wheel, the second pulley is fixedly connected to the spiral plate, and the first pulley is larger than the second pulley. A transmission belt is wound between the first pulley and the second pulley.

[0015] The beneficial effects of this invention are as follows: 1. The operator first places the steel strip coil to be cold-rolled on one of the roller stands near the straight plate one, then pulls the steel strip between the active roller one and the passive roller one, and makes the steel strip located on the upper surface of the guide roller. Then the operator starts the motor and the winding auxiliary component. The motor drives the active roller one and the active roller two to rotate. The rotation of the active roller one will cold-roll the steel strip and transfer the steel strip between the active roller two and the passive roller two. Then the rotation of the active roller two will further cold-roll the steel strip and transfer the steel strip. Under the external guidance of the operator, the transferred steel strip passes between two wiping strips, then passes on the upper surface of one of the guide rollers near the straight plate two, and finally the transferred steel strip is wound on one of the roller stands near the straight plate two. The winding of the steel strip is completed under the action of the winding auxiliary component. When the steel strip passes between the two wiping strips, the two wiping strips can clean the surface of the steel strip, which can reduce the dirt after cold rolling, making it less likely for the steel strip to be mixed with dirt during winding.

[0016] 2. During steel strip transport, the operator guides the strip through the middle of the guide frame, ensuring the serrated blade contacts the upper and lower surfaces of the strip. Then, the rotation of the drive roller drives the slant ring to rotate. This rotation, via the curved groove, causes the guide frame to move horizontally back and forth along the direction perpendicular to the strip transport. This horizontal back and forth movement of the guide frame causes the serrated blade to move horizontally back and forth on the strip surface along the same direction. This allows the serrated blade to remove any hard contaminants that may be attached to the strip surface. Furthermore, the horizontal back and forth movement of the guide frame causes the leveling roller to move horizontally back and forth, rolling and leveling the strip surface. This prevents surface unevenness from affecting the quality of cold rolling.

[0017] 3. The rotation of the motor's output shaft will drive the contact wheel to rotate. The rotation of the contact wheel will drive the spiral plate to rotate rapidly through the transmission component. The rotation of the spiral plate will quickly discharge the oil in the sludge collection box. The faster the motor's output shaft rotates, the faster the steel belt conveys, and the faster the spiral plate rotates. This allows the oil discharge speed in the sludge collection box to change with the steel belt conveying speed, making it less likely for oil to accumulate in the sludge collection box due to the increased steel belt conveying speed. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the cold rolling mechanism and the cleaning mechanism of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the cleaning mechanism of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the serrated shovel and cold rolling mechanism of the present invention.

[0022] Figure 5 For the present invention Figure 4 A magnified three-dimensional structural diagram at point A in the middle.

[0023] Figure 6 This is a three-dimensional structural diagram of the cleaning component of the present invention.

[0024] Figure 7 For the present invention Figure 6 A magnified three-dimensional structural diagram at point B.

[0025] Figure 8 This is a cross-sectional three-dimensional structural diagram of the conduit and spiral plate of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram showing the disassembled components of the inclined scraper frame, sludge storage box, and filter screen of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the anti-blocking mechanism of the present invention.

[0028] Figure 11 For the present invention Figure 10 A magnified three-dimensional structural diagram at point C.

[0029] Figure 12 This is a three-dimensional structural diagram of the sweeping frame and brush plate of the present invention.

[0030] In the attached diagrams: 1: Base plate, 2: Roller frame, 3: Rewinding auxiliary assembly, 41: Straight rod, 42: Guide roller, 51: Straight plate one, 52: Straight plate two, 53: Active roller one, 54: Passive roller one, 55: Active roller two, 56: Passive roller two, 57: Motor, 61: Support rod, 62: Slide rail, 63: Wiping strip, 64: Magnet block, 71: Support rod, 72: Guide frame, 7 3: Serrated scraper plate; 74: Inclined groove ring; 75: Leveling roller; 81: Inclined scraper frame; 82: Sludge storage box; 83: Guide tube; 84: Sludge collection tank; 9: Filter screen; 101: Support frame; 102: Sliding frame; 103: Connecting rod; 104: Inclined groove frame; 105: Sweeping frame; 106: Brush plate; 110: Spiral plate; 111: Support rod; 112: Contact wheel; 113: Transmission assembly. Detailed Implementation

[0031] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0032] Example 1: A cold rolling mill for automatically cleaning steel strip, such as Figures 1-12 As shown, the device includes a base plate 1, with roller frames 2 fixedly connected to both sides of the base plate 1. The roller frames 2 are used to hold steel strip coils. One side of one of the roller frames 2 is provided with a winding auxiliary component 3, which is used to assist in winding the rolled steel strip. Four straight rods 41 are fixedly connected to the base plate 1. Two straight rods 41 form a group, and a guide roller 42 is rotatably connected between the two straight rods 41 in each group. A cold rolling mechanism is provided in the middle of the base plate 1, which is used to cold roll the steel strip. A cleaning mechanism is provided on the base plate 1, which is used to clean the surface of the cold-rolled steel strip.

[0033] The winding auxiliary component 3 includes a bent rod, a swing frame, an electric wheel, and a torsion spring. The bent rod is fixedly connected to one of the roller frames 2. The swing frame is rotatably connected to the bent rod. A torsion spring is connected between the swing frame and the bent rod. An electric wheel is rotatably connected to the side of the bent rod away from the swing frame.

[0034] The cold rolling mechanism includes two straight plates 51, which are fixedly connected to the base plate 1. Two straight plates 52 are fixedly connected to the base plate 1. An active roller 53 is rotatably connected between the two straight plates 51, a passive roller 54 is rotatably connected between the two straight plates 51, an active roller 55 is rotatably connected between the two straight plates 52, and a passive roller 56 is rotatably connected between the two straight plates 52. A motor 57 is fixedly connected to one side of each of the straight plates 51 and 52. One end of each of the active rollers 53 and 55 is connected to the output shaft of the two motors 57.

[0035] The cleaning mechanism includes a support rod 61, which is fixedly connected to the base plate 1. Two slide rails 62 are fixedly connected to one side of the support rod 61, and wiping strips 63 are slidably connected to both slide rails 62. The slide rails 62 facilitate the replacement of the wiping strips 63. A magnet 64 is fixedly connected to the side of each wiping strip 63 near the support rod 61. The magnet 64 contacts the support rod 61 and is used to attract one side of the support rod 61 to enhance the stability of the wiping strip 63.

[0036] In the actual cold rolling process of steel strip, the operator first places the steel strip coil to be cold rolled on one of the roll stands 2 near the straight plate 51, then pulls the steel strip between the active roll 53 and the passive roll 54, so that the steel strip is located on the upper surface of the guide roll 42. Then the operator starts the motor 57 and the winding auxiliary assembly 3. The motor 57 drives the active roll 53 and the active roll 55 to rotate. The rotation of the active roll 53 will cold roll the steel strip and transfer the steel strip between the active roll 55 and the passive roll 56. Then the rotation of the active roll 55 will further cold roll the steel strip and transfer the steel strip. Under the external guidance of the operator, the transferred steel strip passes between two wiping strips 63, then passes over the upper surface of one of the guide rolls 42 near the straight plate 52, and finally the transferred steel strip is wound around one of the guide rolls near the straight plate. On the roller 2 of the second 52, the steel strip is wound up under the action of the winding auxiliary component 3. When the steel strip passes between the two wiping strips 63, the two wiping strips 63 can clean the surface of the steel strip. This makes it easier to clean the dirt after cold rolling of the steel strip, so that the steel strip is less likely to be mixed with dirt after cold rolling. Initially, because the magnet 64 is magnetic, the magnet 64 will attract the iron support rod 61, so that the wiping strip 63 remains stable. When the wiping strip 63 needs to be cleaned or replaced, the operator holds the end of the wiping strip 63 away from the support rod 61, so that the magnet 64 no longer attracts the support rod 61, and pulls the wiping strip 63 out of the slide rail 62. Then, the clean wiping strip 63 is pushed in along the slide rail 62 towards the support rod 61, so that the magnet 64 attracts the iron support rod 61 again, and the replacement of the wiping strip 63 is completed.

[0037] Example 2: Based on Example 1, such as Figure 1 , Figure 4 and Figure 5 As shown, it also includes two support rods 71, which are fixedly connected to the side of the base plate 1 near the straight plate 51. A guide frame 72 is slidably connected between the two support rods 71. Several serrated scrapers 73 are fixedly connected to the side of the guide frame 72 away from the straight plate 51. The serrated scrapers 73 are used to scrape off hard dirt adhering to the surface of the steel strip by moving horizontally reciprocating in the direction perpendicular to the steel strip transmission. A slanted groove ring 74 is fixedly connected to the central shaft of the active roller 53. One end of the guide frame 72 is located in the curved groove on the slanted groove ring 74. Several leveling rollers 75 are rotatably connected to the side of the guide frame 72 away from the straight plate 51.

[0038] During the steel strip transport, the operator guides the steel strip through the middle of the guide frame 72, causing the serrated shovel plate 73 to contact the upper and lower surfaces of the steel strip. Then, the rotation of the drive roller 53 drives the inclined groove ring 74 to rotate. The rotation of the inclined groove ring 74 drives the guide frame 72 to move horizontally back and forth along the direction perpendicular to the steel strip transport through the curved groove. The horizontal back and forth movement of the guide frame 72 drives the serrated shovel plate 73 to move horizontally back and forth on the surface of the steel strip along the direction perpendicular to the steel strip transport. In this way, the serrated shovel plate 73 can remove any hard dirt that may be attached to the surface of the steel strip. The horizontal back and forth movement of the guide frame 72 also drives the leveling roller 75 to move horizontally back and forth. The horizontal back and forth movement of the leveling roller 75 rolls and levels the surface of the steel strip, making it less likely for the surface unevenness of the steel strip to affect the quality of cold rolling.

[0039] Example 3: Based on Example 2, such as Figures 6-9 As shown, it also includes a scraping assembly, which is disposed on the first straight plate 51 and the second straight plate 52. The scraping assembly is used to scrape off the oil stains on the first active roller 53 and the second active roller 55. The scraping assembly includes two inclined scraper frames 81, which are used to scrape off the oil stains on the surface of the first active roller 53 and the second active roller 55. The two inclined scraper frames 81 are respectively fixedly connected between the two first straight plates 51 and between the two second straight plates 52. The two inclined scraper frames 81 are respectively in contact with the first active roller 53 and the second active roller 55. A sludge storage box 82 is fixedly connected to the lower part of each inclined scraper frame 81. A conduit 83 is fixedly connected to one side of each sludge storage box 82. Two sludge collection tanks 84 are placed on the side of the bottom plate 1 near the conduit 83. A filter screen 85 is fixedly connected to each of the two sludge storage boxes 82.

[0040] Two inclined scraper frames 81 contact the surfaces of active roll 1 53 and active roll 2 55 respectively. When active roll 1 53 and active roll 2 55 rotate, the two inclined scraper frames 81 can scrape off the oil stains on the surfaces of active roll 1 53 and active roll 2 55 respectively. The scraped oil stains will then flow into the sludge storage box 82 below the inclined scraper frames 81. The filter screen 85 on the sludge storage box 82 can filter the oil stains flowing into the sludge storage box 82. When the oil stains in the sludge storage box 82 accumulate to a certain amount, the oil stains will flow into the sludge collection tank 84 through the conduit 83. Then, the operator can remove the sludge collection tank 84, pour out the oil stains, and put the sludge collection tank 84 back in its original position to achieve reuse. Scraping off the oil stains on active roll 1 53 and active roll 2 55 can prevent active roll 1 53 and active roll 2 55 from slipping and spinning idly due to the presence of oil stains on their surfaces, thereby reducing the cold rolling efficiency of the steel strip.

[0041] Example 4: Based on Example 3, such as Figures 10-12As shown, it also includes an anti-clogging mechanism, which is disposed on the first straight plate 51 and the second straight plate 52. The anti-clogging mechanism is used to move the filter residue on the filter screen 85. The anti-clogging mechanism includes two support frames 101, which are respectively fixedly connected to the upper part of the first straight plate 51 and the second straight plate 52. A sliding frame 102 is slidably connected between the two support frames 101. A connecting rod 103 is fixedly connected to the side of the sliding frame 102 near the guide frame 72. Two inclined groove frames 104 are fixedly connected to the sliding frame 102. A sweeping frame 105 is slidably connected to each inclined scraper frame 81. A brush plate 106 is connected to the lower part of each sweeping frame 105 through a hinge. The brush plate 106 can only swing away from the first straight plate 51. The upper end of the sweeping frame 105 passes through the inclined groove on the inclined groove frame 104.

[0042] The horizontal reciprocating movement of the guide frame 72 along the vertical steel belt transmission direction will cause the connecting rod 103 to move together. The horizontal reciprocating movement of the connecting rod 103 along the vertical steel belt transmission direction will cause the sliding frame 102 and the inclined chute frame 104 to move together. The horizontal reciprocating movement of the inclined chute frame 104 along the vertical steel belt transmission direction will cause the sweeping frame 105 and the brush plate 106 to move horizontally reciprocating along the parallel steel belt transmission direction. Since the sweeping frame 105 and the brush plate 106 are connected by a hinge, when the sweeping frame 105 and the brush plate 106 move together away from the active roller 53, the brush plate 106 can brush the filter residue on the filter screen 85 to the edge. Then, when the sweeping frame 105 and the brush plate 106 move together towards the active roller 53, the brush plate 106 will swing due to resistance, so that the filter residue on the filter screen 85 will not be brushed. This makes it less likely for the filter screen 85 to be affected by the accumulation of filter residue, thus ensuring the filtration effect.

[0043] Example 5: Based on Example 4, such as Figures 6-8 As shown, it also includes two spiral plates 110, which are rotatably connected to the two conduits 83 respectively. One of the support rods 111 is fixedly connected to the side of the straight plate 51 near the motor 57, and the other support rod 111 is fixedly connected to the side of the straight plate 52 near the motor 57. Contact wheels 112 are rotatably connected to both support rods 111. Both contact wheels 112 are in contact with the output shaft of the motor 57. A transmission assembly 113 is connected between the contact wheels 112 and the spiral plates 110.

[0044] The transmission assembly 113 includes a first pulley, a second pulley, and a transmission belt. The first pulley is fixedly connected to the contact wheel 112, the second pulley is fixedly connected to the spiral plate 110, and the first pulley is larger than the second pulley. A transmission belt is wound between the first pulley and the second pulley.

[0045] The rotation of the output shaft of motor 57 drives the contact wheel 112 to rotate. The rotation of the contact wheel 112 drives the spiral plate 110 to rotate rapidly through the transmission assembly 113. The rotation of the spiral plate 110 will quickly discharge the oil in the sludge storage box 82. The faster the output shaft of motor 57 rotates, the faster the steel belt conveys, and the faster the spiral plate 110 rotates. This allows the oil discharge speed in the sludge storage box 82 to change with the conveying speed of the steel belt, so that the oil in the sludge storage box 82 is not prone to accumulation due to the increased conveying speed of the steel belt.

[0046] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A cold rolling mill for automatically cleaning steel strip, characterized in that: The system includes a base plate (1), on which roller frames (2) are fixedly connected to both sides. One of the roller frames (2) is provided with a winding auxiliary component (3) on one side. Four straight rods (41) are fixedly connected to the base plate (1). Two straight rods (41) form a group. A guide roller (42) is rotatably connected between the two straight rods (41) in each group. A cold rolling mechanism is provided in the middle of the base plate (1) for cold rolling the steel strip. A cleaning mechanism is provided on the base plate (1) for cleaning the surface of the cold-rolled steel strip.

2. The automatic cleaning cold rolling mill for steel strip according to claim 1, characterized in that: The winding auxiliary component (3) includes a bent rod, a swing frame, an electric wheel and a torsion spring. The bent rod is fixedly connected to one of the roller frames (2). The swing frame is rotatably connected to the bent rod. A torsion spring is connected between the swing frame and the bent rod. An electric wheel is rotatably connected to the side of the bent rod away from the swing frame.

3. A cold rolling mill for automatically cleaning steel strip according to claim 1, characterized in that: The cold rolling mechanism includes two straight plates (51), which are fixedly connected to the base plate (1). Two straight plates (52) are fixedly connected to the base plate (1). An active roller (53) is rotatably connected between the two straight plates (51). A passive roller (54) is rotatably connected between the two straight plates (51). An active roller (55) is rotatably connected between the two straight plates (52). A passive roller (56) is rotatably connected between the two straight plates (52). A motor (57) is fixedly connected to one side of each of the straight plates (51) and the two straight plates (52). One end of each of the active rollers (53) and the active roller (55) is connected to the output shaft of the two motors (57).

4. A cold rolling mill for automatically cleaning steel strip according to claim 3, characterized in that: The cleaning mechanism includes a support rod (61), which is fixedly connected to the base plate (1). Two slide rails (62) are fixedly connected to one side of the support rod (61). Wiping strips (63) are slidably connected to both slide rails (62). A magnet (64) is fixedly connected to the side of each wiping strip (63) near the support rod (61). The magnet (64) is in contact with the support rod (61).

5. A cold rolling mill for automatically cleaning steel strip according to claim 4, characterized in that: It also includes two support rods (71), which are fixedly connected to the side of the base plate (1) near the straight plate (51). A guide frame (72) is slidably connected between the two support rods (71). Several serrated shovels (73) are fixedly connected to the side of the guide frame (72) away from the straight plate (51). A slanted groove ring (74) is fixedly connected to the central axis of the active roller (53). One end of the guide frame (72) is located in the curved groove on the slanted groove ring (74). Several leveling rollers (75) are rotatably connected to the side of the guide frame (72) away from the straight plate (51).

6. A cold rolling mill for automatically cleaning steel strip according to claim 5, characterized in that: It also includes a scraping assembly, which is disposed on the first straight plate (51) and the second straight plate (52). The scraping assembly is used to scrape off the oil stains on the first active roller (53) and the second active roller (55). The scraping assembly includes two inclined scraper frames (81). The two inclined scraper frames (81) are fixedly connected between the two first straight plates (51) and between the two second straight plates (52). The two inclined scraper frames (81) are in contact with the first active roller (53) and the second active roller (55) respectively. A sludge storage box (82) is fixedly connected to the lower part of each inclined scraper frame (81). A conduit (83) is fixedly connected to one side of each sludge storage box (82). Two sludge collection tanks (84) are placed on the side of the bottom plate (1) near the conduit (83). A filter screen (85) is fixedly connected to each of the two sludge storage boxes (82).

7. A cold rolling mill for automatically cleaning steel strip according to claim 6, characterized in that: It also includes an anti-clogging mechanism, which is disposed on the first straight plate (51) and the second straight plate (52). The anti-clogging mechanism is used to move the filter residue on the filter screen (85). The anti-clogging mechanism includes two support frames (101), which are respectively fixedly connected to the upper part of the first straight plate (51) and the second straight plate (52). A sliding frame (102) is slidably connected between the two support frames (101). A connecting rod (103) is fixedly connected to the side of the sliding frame (102) near the guide frame (72). Two inclined slot frames (104) are fixedly connected to the sliding frame (102). A sweeping frame (105) is slidably connected to each of the inclined scraper frames (81). A brush plate (106) is connected to the lower part of each sweeping frame (105) via a hinge. The upper end of each sweeping frame (105) passes through the inclined slot on the inclined slot frame (104).

8. A cold rolling mill for automatically cleaning steel strip according to claim 6, characterized in that: It also includes two spiral plates (110), which are rotatably connected to the two conduits (83). One of the support rods (111) is fixedly connected to the side of the straight plate (51) near the motor (57), and the other support rod (111) is fixedly connected to the side of the straight plate (52) near the motor (57). Contact wheels (112) are rotatably connected to both support rods (111). Both contact wheels (112) are in contact with the output shaft of the motor (57). A transmission assembly (113) is connected between the contact wheel (112) and the spiral plate (110).

9. A cold rolling mill for automatically cleaning steel strip according to claim 8, characterized in that: The transmission assembly (113) includes a first pulley, a second pulley, and a transmission belt. The first pulley is fixedly connected to the contact wheel (112), the second pulley is fixedly connected to the spiral plate (110), and the first pulley is larger than the second pulley. A transmission belt is wound between the first pulley and the second pulley.

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