A push-pull and continuous dual-purpose strip steel surface cleaning production line and cleaning method thereof

Abstract

The present invention provides a push-pull and continuous dual-purpose strip steel surface cleaning production line and a cleaning method thereof. Along the working direction of the push-pull and continuous dual-purpose strip steel surface cleaning production line, the push-pull and continuous dual-purpose strip steel surface cleaning production line comprises a welding machine (5), a first strip steel storage device, a cutting shear (13) and a strip steel surface cleaning device arranged in sequence. The push-pull and continuous dual-purpose strip steel surface cleaning production line can realize flexible switching between push-pull and continuous production modes, meet the production of strip steel thickness between 0.8mm-12.7mm, continuous production between 0.8mm-6mm, and push-pull production between 6mm-12.7mm, and has the advantages of wide coverage of the thickness of the produced plate and strip, flexible switching of production methods, simple equipment and civil engineering, and low investment.

Description

Technical Field

[0001] The invention relates to the field of steel rolling equipment, in particular to a push-pull and continuous dual-purpose strip steel surface cleaning production line, and also to a push-pull and continuous dual-purpose strip steel surface cleaning method. Background Art

[0002] During the hot rolling production mode, a layer of iron oxide scale will be formed on the surface of the steel strip. In the subsequent production and use of the steel strip, the iron oxide scale must be removed, that is, the scale of the steel strip must be removed. At present, the technology that can remove the scale of steel strip on a large scale is mainly to use hydrochloric acid to clean the steel strip. There are two production modes for this method. One is to use a strip for each steel coil, that is, a push-pull pickling unit; the other is to weld the head and tail of the front and rear steel coils together, that is, continuous production.

[0003] The characteristics of the push-pull pickling production unit are small investment, flexible and convenient production, and the strip thickness that can be produced is 2.2mm-12.7mm. However, for strips with a thickness of 2.2mm-6mm, when large-scale and high-yield production is required, the push-pull pickling unit has the disadvantages of slow rhythm and low output. At the same time, since each steel coil needs to be threaded, it will be very difficult to thread strips below 2.2mm, so it is not suitable for push-pull production.

[0004] The characteristic of the continuous pickling production unit is that the head and tail of the front and rear steel coils are welded together, and large horizontal loops are set before and after the acid tank of the continuous unit to store the strip steel, so as to ensure that the strip steel in the acid tank does not stop when the unit's entry and exit process is shut down, so as to ensure the pickling quality and the unit can achieve uninterrupted production. The most suitable strip steel thickness for the continuous pickling unit is 0.8mm-6mm. Since the unit is equipped with loopers, S-type tension rollers and other equipment, the strip steel needs to be bent repeatedly when passing through these equipment. For thicker strip steel, such as 8mm-12.7mm in thickness, it is very difficult to bend and then restore it to straightness, so it can only be produced in a horizontal state. The continuous pickling unit is not suitable for the production of thicker strip steel.

[0005] In summary, there is no pickling unit in the prior art that can be used for both push-pull production and continuous production to adapt to the surface cleaning production of strip steel with a plate thickness of 0.8mm-12.7mm.

[0006] Glossary:

[0007] Push-pull production: Each steel coil is produced separately without welding, each coil needs to be threaded, and production is intermittent;

[0008] Continuous production: The front and rear steel coils are welded together by a welding machine for continuous and uninterrupted production. Summary of the invention

[0009] In order to have push-pull production and continuous production functions, the purpose of the present invention is to provide a push-pull and continuous dual-purpose strip surface cleaning production line and a cleaning method thereof. The push-pull and continuous dual-purpose strip surface cleaning production line can realize flexible switching between push-pull and continuous production modes, and meet the production of strip thickness between 0.8mm-12.7mm, continuous production between 0.8mm-6mm, and push-pull production between 6mm-12.7mm. It has the advantages of wide coverage of production strip thickness, flexible switching of production methods, simple equipment and civil engineering, and low investment.

[0010] The technical solution adopted by the present invention to solve its technical problem is:

[0011] A push-pull and continuous dual-purpose strip steel surface cleaning production line, along the working direction of the push-pull and continuous dual-purpose strip steel surface cleaning production line, the push-pull and continuous dual-purpose strip steel surface cleaning production line includes a welding machine, a first steering pinch roller, a first strip steel storage device, a second steering pinch roller, a cutting shear and a strip steel surface cleaning device arranged in sequence; the first strip steel storage device contains a first tension roller, a first single deviation correction roller, a first looper device, a second single deviation correction roller and a second tension roller arranged in sequence.

[0012] A coiling trolley, an uncoiler, a straightening machine and a hydraulic shear are arranged upstream of the welding machine, and along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, the coiling trolley, the uncoiler, the straightening machine and the hydraulic shear are arranged in sequence.

[0013] The hydraulic shear is a double-layer hydraulic shear, which comprises an upper shear blade and a lower shear blade which are spaced apart from each other. The coiling trolley comprises a first coiling trolley and a second coiling trolley, the uncoiler comprises a first uncoiler and a second uncoiler, and the straightener comprises a first straightener and a second straightener. The first coiling trolley, the first uncoiler and the first straightener are sequentially located upstream of the upper shear blade, and the second coiling trolley, the second uncoiler and the second straightener are sequentially located upstream of the lower shear blade.

[0014] Along the working direction of the push-pull and continuous dual-purpose strip steel surface cleaning production line, a first pinch roller is arranged between the lower shear blade and the welder, and a third steering pinch roller is arranged between the upper shear blade and the first pinch roller.

[0015] The first looper device is a horizontal looper device.

[0016] Along the working direction of the push-pull and continuous dual-purpose strip steel surface cleaning production line, the strip steel surface cleaning equipment includes a pickling tank, a rinsing tank and a drying machine arranged in sequence; or the strip steel surface cleaning equipment includes a shot blasting and descaling machine.

[0017] Along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, a corner cutting shear and a head warping device are arranged in sequence between the cutting shear and the strip surface cleaning equipment, and a second pinch roller, a second looper device, a deviation correction pinch roller, a disc shear and a waste edge processing device, a three-roller tension roller, a tail cutting shear and a double pinch roller are arranged in sequence downstream of the strip surface cleaning equipment.

[0018] A coiler and a coil unloading trolley are arranged in sequence downstream of the double clamping rollers. The coiler includes a first coiler and a second coiler, and the coil unloading trolley includes a first coil unloading trolley and a second coil unloading trolley. The first coiler is arranged correspondingly to the first coil unloading trolley, and the second coiler is arranged correspondingly to the second coil unloading trolley.

[0019] A push-pull and continuous dual-purpose strip steel surface cleaning method, the push-pull and continuous dual-purpose strip steel surface cleaning method adopts the push-pull and continuous dual-purpose strip steel surface cleaning production line, the push-pull and continuous dual-purpose strip steel surface cleaning method comprises the following steps:

[0020] In the continuous production mode, the strip steel of the first specification passes through the welding machine, the first turning pinch roller, the first strip steel storage device, the second turning pinch roller, the cutting shear and the strip steel surface cleaning device in sequence, and the welding machine welds the two adjacent strip steels of the first specification end to end into one;

[0021] In the push-pull production mode, the strip steel of the second specification passes through the welding machine, the first steering pinch roller, the second steering pinch roller, the cutting shear and the strip steel surface cleaning equipment in sequence, and the strip steel of the second specification does not enter the first strip steel storage equipment.

[0022] In the process of switching from the continuous production mode to the push-pull production mode, the strip steel of the first specification is cut by shearing, and a section of the strip steel of the first specification is stored in the first strip steel storage device;

[0023] During the process of switching from the push-pull production mode to the continuous production mode, the welder welds the strip steel of the first specification outside the first strip steel storage device and a section of strip steel of the first specification stored in the first strip steel storage device into one.

[0024] The beneficial effects of the present invention are:

[0025] 1. The thickness of the produced strip steel is 0.8mm-12.7mm, covering a wide range of product thickness.

[0026] 2. Compared with the fully continuous pickling production line, the investment in equipment and civil engineering buildings is less. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0028] Figure 1 It is a schematic diagram of the push-pull and continuous dual-purpose strip steel surface cleaning production line of the present invention.

[0029] Figure 2 It is a schematic diagram of the upper winding trolley part.

[0030] Figure 3 It is a schematic diagram of the coil unloading trolley.

[0031] 1. Coil loading trolley; 2. Uncoiler; 3. Straightening machine; 4. Hydraulic shear; 5. Welding machine; 6. First steering pinch roller; 7. First tension roller; 8. First deviation correction single roller; 9. Second deviation correction single roller; 10. First looper; 11. Second tension roller; 12. Second steering pinch roller; 13. Cutting shear; 14. Angle cutting shear; 15. Head lifting device; 16. Pickling tank; 17. Rinsing tank; 18. Dryer; 19. Second pinch roller; 20. Second looper; 21. Deviation correction pinch roller; 22. Disc shear and waste edge processing device; 23. Three-roller tension roller; 24. Tail cutting shear; 25. Double pinch roller; 26. Coiler; 27. Unloading trolley; 28. First pinch roller; 29. ​​Third steering pinch roller;

[0032] 101. first winding trolley; 102. second winding trolley;

[0033] 201, first uncoiler; 202, second uncoiler;

[0034] 301, first straightening machine; 302, second straightening machine;

[0035] 401, upper shear blade; 402, lower shear blade;

[0036] 2601, first coiler; 2602, second coiler;

[0037] 2701, the first coil unloading trolley; 2702, the second coil unloading trolley. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] A push-pull and continuous dual-purpose strip steel surface cleaning production line, along the working direction A of the push-pull and continuous dual-purpose strip steel surface cleaning production line (i.e. the direction in which the strip steel is moving during operation), the push-pull and continuous dual-purpose strip steel surface cleaning production line comprises a welding machine 5, a first steering pinch roller 6, a first strip steel storage device, a second steering pinch roller 12, a cutting shear 13 and a strip steel surface cleaning device which are arranged in sequence; along the direction in which the strip steel is moving during operation, the first strip steel storage device comprises a first tension roller 7, a first deviation correction single roller 8, a first looper device 10, a second deviation correction single roller 9 and a second tension roller 11 which are arranged in sequence, such as Figure 1 shown.

[0040] The push-pull and continuous dual-purpose strip surface cleaning production line can realize flexible switching between push-pull and continuous production modes, meet the production of strip thickness between 0.8mm-12.7mm, continuous production between 0.8mm-6mm, push-pull production between 6mm-12.7mm, and has the advantages of wide coverage of production strip thickness, flexible switching of production methods, simple equipment and civil engineering, and low investment.

[0041] In this embodiment, a coiling trolley 1, an uncoiler 2, a straightening machine 3 and a hydraulic shear 4 are arranged upstream of the welding machine 5. Along the working direction A (which can be roughly understood as the direction from back to front) of the push-pull and continuous dual-purpose strip surface cleaning production line, the coiling trolley 1, the uncoiler 2, the straightening machine 3 and the hydraulic shear 4 are arranged in sequence. The coiling trolley 1, the uncoiler 2, the straightening machine 3 and the hydraulic shear 4 can all be existing technology products.

[0042] In this embodiment, the hydraulic shear 4 is a double-layer hydraulic shear, and the hydraulic shear 4 includes an upper shear blade 401 and a lower shear blade 402 arranged at an interval from top to bottom. The coiling trolley 1 includes a first coiling trolley 101 and a second coiling trolley 102, the uncoiler 2 includes a first uncoiler 201 and a second uncoiler 202, and the straightener 3 includes a first straightener 301 and a second straightener 302. The first coiling trolley 101, the first uncoiler 201 and the first straightener 301 are sequentially located upstream of the upper shear blade 401, and the second coiling trolley 102, the second uncoiler 202 and the second straightener 302 are sequentially located upstream of the lower shear blade 402. Figure 2 shown.

[0043] The first straightener 301 and the second straightener 302 are arranged vertically, the first decoiler 201 and the second decoiler 202 are arranged vertically, and the first coiling trolley 101 and the second coiling trolley 102 are arranged vertically.

[0044] In this embodiment, along the working direction of the push-pull and continuous dual-purpose strip steel surface cleaning production line, a first pinch roller 28 is provided between the lower shear blade 402 and the welder 5, and a third steering pinch roller 29 is provided between the upper shear blade 401 and the first pinch roller 28. The first pinch roller 28 and the third steering pinch roller 29 can both be products of the prior art. The function of the welder 5 is to weld two adjacent strip steels end to end into one strip steel in the continuous production mode.

[0045] In this embodiment, the first strip steel storage device can be located below or above the first steering pinch roller 6 and the second steering pinch roller 12. The first steering pinch roller 6, the second steering pinch roller 12, the first tension roller 7, the first deviation correction roller 8, the first looper 10, the second deviation correction roller 9 and the second tension roller 11 can all be existing products.

[0046] The first looper device 10 is used to store a certain length of steel strip to ensure the continuous production of the push-pull and continuous dual-purpose strip surface cleaning production line. The first looper device 10 can be a horizontal looper device or a vertical looper device. Preferably, the first looper device 10 can be a horizontal looper device, such as a two-layer horizontal looper device, a four-layer horizontal looper device, or a six-layer horizontal looper device.

[0047] In this embodiment, the strip surface cleaning can be carried out by hydrochloric acid chemical descaling, that is, along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, the strip surface cleaning equipment includes a pickling tank 16, a rinsing tank 17 and a dryer 18 arranged in sequence. Alternatively, the strip surface cleaning can also be carried out in a physical manner, for example, the strip surface cleaning equipment includes a shot blasting descaling machine, such as a wet shot blasting unit descaling machine or a dry shot blasting descaling machine. The pickling tank 16, the rinsing tank 17, the dryer 18 and the shot blasting descaling machine can all be existing technology products.

[0048] In this embodiment, along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, a cutting shear 14 and a head-lifting device 15 are sequentially arranged between the cutting shear 13 and the strip surface cleaning device, and a second pinch roller 19, a second looper device 20, a deviation-correcting pinch roller 21, a disk shear and a waste edge processing device 22, a three-roller tension roller 23, a tail-cutting shear 24 and a double pinch roller 25 are sequentially arranged downstream of the strip surface cleaning device. The second pinch roller 19, the second looper device 20, the deviation-correcting pinch roller 21, the disk shear and the waste edge processing device 22, the three-roller tension roller 23, the tail-cutting shear 24 and the double pinch roller 25 can all be existing technology products.

[0049] In this embodiment, the second looper 20 is used to store a certain length of steel strip to ensure continuous production of the push-pull and continuous dual-purpose strip surface cleaning production line. The second looper 20 can be a horizontal looper, a vertical looper or a pit looper.

[0050] In this embodiment, along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, a coiler 26 and a coil unloading trolley 27 are sequentially arranged downstream of the double pinch roller 25, the coiler 26 includes a first coiler 2601 and a second coiler 2602, the coil unloading trolley 27 includes a first coil unloading trolley 2701 and a second coil unloading trolley 2702, the first coiler 2601 is arranged correspondingly to the first coil unloading trolley 2701, and the second coiler 2602 is arranged correspondingly to the second coil unloading trolley 2702, as shown in FIG. Figure 3 The coiler 26 and the coil unloading trolley 27 can both be products of the prior art.

[0051] The second coiler 2602 and the first coiler 2601 are arranged front and back, and the second coil unloading trolley 2702 and the first coil unloading trolley 2701 are arranged front and back.

[0052] The following is a push-pull and continuous dual-purpose strip steel surface cleaning method, which adopts the push-pull and continuous dual-purpose strip steel surface cleaning production line mentioned above, and the push-pull and continuous dual-purpose strip steel surface cleaning method comprises the following steps:

[0053] In the continuous production mode, the strip steel of the first specification passes through the welding machine 5, the first steering pinch roller 6, the first strip steel storage device, the second steering pinch roller 12, the cutting shear 13 and the strip steel surface cleaning device in sequence, the welding machine 5 welds the two adjacent strip steels of the first specification end to end into one body, the strip steel of the first specification enters the first strip steel storage device, and the strip steel surface cleaning device processes the surface of the strip steel of the first specification;

[0054] In the push-pull production mode, the strip steel of the second specification passes through the welding machine 5, the first steering pinch roller 6, the second steering pinch roller 12, the cutting shear 13 and the strip steel surface cleaning equipment in sequence. The welding machine 5 does not process the strip steel of the second specification, the strip steel of the second specification does not enter the first strip steel storage equipment, and the strip steel surface cleaning equipment processes the surface of the strip steel of the second specification.

[0055] Below Figure 1 Taking the push-pull and continuous dual-purpose strip surface cleaning production line shown as an example, its working process is introduced in detail.

[0056] In the continuous production mode, the strip steel of the first specification on the first coiling trolley 101 passes through the first decoiler 201, the first straightening machine 301, the upper shear blade 401 of the hydraulic shear 4, the third steering pinch roller 29, the first pinch roller 28, the welding machine 5, the first steering pinch roller 6, the first tension roller 7, the first deviation correction single roller 8, the second deviation correction single roller 9, the first looper 10, the second tension roller 11, the second steering pinch roller 12, the cutting shear 13, the angle cutting shear 14, the warping device 15, the pickling tank 16, the rinsing tank 17, the drying machine 18, the second pinch roller 19, the second looper 20, the deviation correction pinch roller 21, the disc shear and the waste edge processing device 22, the three-roller tension roller 23, the tail cutting shear 24, the double pinch roller 25 and the first coiler 2601, and then is rolled into a steel coil on the first unloading trolley 2701.

[0057] In the continuous production mode, the welder 5 welds two adjacent strips of the first specification into one piece, and the strips of the first specification enter the first strip storage equipment (i.e., the first tension roller 7, the first single deviation correction roller 8, the second single deviation correction roller 9, the first looper 10, and the second tension roller 11), and the strip surface cleaning equipment (i.e., the pickling tank 16, the rinsing tank 17, and the dryer 18) processes the surface of the strip of the first specification. The first looper 10 (horizontal looper) can store enough strips, and when the inlet welder 5 is welding, the inlet section stops, which can ensure that the pickling tank 16 produces at the process section speed.

[0058] In the push-pull production mode, the strip steel of the second specification on the second coiling trolley 102 passes through the first decoiler 201, the first straightening machine 301, the upper shear blade 401 of the hydraulic shear 4, the first pinch roller 28, the welding machine 5, the first steering pinch roller 6, the second steering pinch roller 12, the cutting shear 13, the angle cutting shear 14, the head-warping device 15, the pickling tank 16, the rinsing tank 17, the dryer 18, the second pinch roller 19, the second looper device 20, the deviation correction pinch roller 21, the disc shear and the waste edge processing device 22, the three-roller tension roller 23, the tail cutting shear 24, the double pinch roller 25 and the second coiler 2602, and then is rolled into a steel coil on the second unloading trolley 2702.

[0059] In the push-pull production mode, the welding machine 5 does not process the second specification of the strip steel, the second specification of the strip steel does not enter the first strip steel storage device, the strip steel passes through the first steering pinch roller 6 and the second steering pinch roller 12 in a horizontal state, and the strip steel surface cleaning device processes the surface of the second specification of the strip steel.

[0060] During the process of switching from the continuous production mode to the push-pull production mode, the cutting shear 13 cuts the strip steel of the first specification, and a section of the strip steel of the first specification is stored in the first strip steel storage device; during the process of switching from the push-pull production mode to the continuous production mode, the welding machine 5 welds the strip steel of the first specification outside the first strip steel storage device (i.e., the new or next one) and a section (about 50m) of the strip steel of the first specification stored in the first strip steel storage device into one piece.

[0061] The strip steel, whether in the continuous production mode or the push-pull production mode, enters the second looper device 20 (pit looper) after exiting the pickling tank 16, the rinsing tank 17 and the drying machine 18. The function of the pit looper is to ensure that the process section does not stop when the strip steel is stopped at the exit for coiling and cutting, thereby ensuring the pickling quality of the strip steel. After passing through the pit looper, the strip steel enters the disc shear and waste edge processing device 22, the three-roller tension roller 23, the tail shear 24, and the double pinch roller 25 in sequence, and finally the coiler 26 completes the coiling of the strip steel, and the unloading car 27 completes the unloading.

[0062] The push-pull and continuous dual-purpose strip steel surface cleaning production line and cleaning method of the present invention are characterized in that:

[0063] 1. The welded strip steel enters the first looper device 10 (horizontal looper) through the lower channel for continuous production; the unwelded strip steel passes through the upper channel, and the strip steel is kept in a horizontal state for push-pull production.

[0064] 2. A cutting shear 13 is arranged outside the outlet of the first strip steel storage device. When it is necessary to switch from the continuous mode to the push-pull mode, the cutting shear 13 cuts the strip steel, leaving a section of the strip steel of about 50m in length in the first looper device 10 as a traction belt. When the strip steel is subsequently switched from the push-pull mode to the continuous mode, this section of the traction belt retreats to the welding machine and is welded together with the next section of the steel coil, eliminating the trouble of threading the strip steel in the first looper device 10 when switching the production mode.

[0065] 3. The entrance is equipped with double uncoilers (the first uncoiler 201 and the second uncoiler 202) to reduce the entrance downtime during welding.

[0066] 4. The outlet is equipped with double pinch rollers 25 to provide a certain amount of back tension to ensure the coiling effect of thick strip steel.

[0067] 5. The export is equipped with double coilers (the first coiler 2601 and the second coiler 2602) to reduce the export unloading operation time and improve production efficiency.

[0068] Behind the welding machine 5, a first turning pinch roll 6, a second turning pinch roll 12, the first strip steel storage device and a cutting shear 13 are provided, which can realize the flexible switching between the push-pull type and the continuous mill production modes. A strip steel with a length of about 50 m is reserved in the first loop device 10 (horizontal loop), which solves the problem of difficult threading of the strip steel in the horizontal loop during the switching of production modes.

[0069] In the present invention, the decoiler 2 at the entrance can be one or two; the coiler 26 in the exit area can be one or two. The strip steels of the first specification and the second specification can be distinguished by thickness. For example, the thickness of the strip steel of the first specification is 0.8 mm - 6 mm, that is, greater than or equal to 0.8 mm and less than or equal to 6 mm; the thickness of the strip steel of the second specification is 6 mm - 12.7 mm, that is, greater than 6 mm and less than or equal to 12.7 mm.

[0070] The specific production mode selection is not limited to this strip steel thickness, and other thickness selections are also possible; at the same time, the production mode can also be selected according to the variety of strip steel materials. For example, the material of the strip steel of the first specification is ordinary steel, and continuous production is selected; the material of the strip steel of the second specification is special quality steel or silicon steel, etc., and push-pull production is selected. That is, the strip steels of the first specification and the second specification can also be distinguished by composition or mechanical properties. For example, the bending strength of the strip steel of the first specification is less than that of the strip steel of the second specification. The strip steel of the first specification can be a strip steel suitable for the existing continuous production mode, and the strip steel of the second specification can be a strip steel suitable for the existing push-pull production mode.

[0071] For the convenience of understanding and description, absolute positional relationships are used in the present invention for expression. Without special instructions, the orientation word "upper" represents Figure 1 the upper side direction in Figure 1 the lower side direction in Figure 1 the right side direction in Figure 1 the left side direction in

[0072] As mentioned above, only the specific embodiments of the present invention are provided, and the scope of the invention implementation cannot be limited by them. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the present invention patent, should still fall within the scope covered by this patent. In addition, the technical features in the present invention, between technical features, between technical features and technical solutions, and between technical solutions can be freely combined and used.

Claims

1. A push-pull and continuous dual-purpose strip steel surface cleaning production line, characterized in that: Along the working direction of the push-pull and continuous dual-purpose strip steel surface cleaning production line, the push-pull and continuous dual-purpose strip steel surface cleaning production line comprises a welding machine (5), a first steering pinch roller (6), a first strip steel storage device, a second steering pinch roller (12), a cutting shear (13) and a strip steel surface cleaning device which are arranged in sequence; the first strip steel storage device comprises a first tension roller (7), a first deviation-correcting single roller (8), a first looping device (10), a second deviation-correcting single roller (9) and a second tension roller (11) which are arranged in sequence; The hydraulic shear (4) is a double-layer hydraulic shear. The hydraulic shear (4) comprises an upper shear blade (401) and a lower shear blade (402) which are arranged at an interval from top to bottom. The coiling trolley (1) comprises a first coiling trolley (101) and a second coiling trolley (102). The uncoiler (2) comprises a first uncoiler (201) and a second uncoiler (202). The straightening machine (3) comprises a first straightening machine (301) and a second straightening machine (302). The first coiling trolley (101), the first uncoiler (201) and the first straightening machine (301) are sequentially located upstream of the upper shear blade (401). The second coiling trolley (102), the second uncoiler (202) and the second straightening machine (302) are sequentially located upstream of the lower shear blade (402).

2. The push-pull and continuous dual-purpose strip steel surface cleaning production line according to claim 1 is characterized in that: A coiling trolley (1), an uncoiler (2), a straightening machine (3) and a hydraulic shear (4) are arranged upstream of the welding machine (5). Along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, the coiling trolley (1), the uncoiler (2), the straightening machine (3) and the hydraulic shear (4) are arranged in sequence.

3. The push-pull and continuous dual-purpose strip steel surface cleaning production line according to claim 1 is characterized in that: Along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, a first pinch roller (28) is provided between the lower shear blade (402) and the welder (5), and a third steering pinch roller (29) is provided between the upper shear blade (401) and the first pinch roller (28).

4. The push-pull and continuous dual-purpose strip steel surface cleaning production line according to claim 1 is characterized in that: The first looper device (10) is a horizontal looper device.

5. The push-pull and continuous dual-purpose strip steel surface cleaning production line according to claim 1 is characterized in that: Along the working direction of the push-pull and continuous dual-purpose strip steel surface cleaning production line, the strip steel surface cleaning equipment comprises a pickling tank (16), a rinsing tank (17) and a drying machine (18) which are arranged in sequence; Alternatively, the strip steel surface cleaning equipment comprises a shot blasting and descaling machine.

6. The push-pull and continuous dual-purpose strip steel surface cleaning production line according to claim 1 is characterized in that: Along the working direction of the push-pull and continuous dual-purpose strip surface cleaning production line, a cutting shear (14) and a head-lifting device (15) are arranged in sequence between the cutting shear (13) and the strip surface cleaning equipment, and a second pinch roller (19), a second looper device (20), a deviation correction pinch roller (21), a disc shear and a waste edge processing device (22), a three-roller tension roller (23), a tail cutting shear (24) and a double pinch roller (25) are arranged in sequence downstream of the strip surface cleaning equipment.

7. The push-pull and continuous dual-purpose strip steel surface cleaning production line according to claim 6 is characterized in that: A coiler (26) and a coil unloading trolley (27) are arranged in sequence downstream of the double clamping roller (25); the coiler (26) comprises a first coiler (2601) and a second coiler (2602); the coil unloading trolley (27) comprises a first coil unloading trolley (2701) and a second coil unloading trolley (2702); the first coiler (2601) and the first coil unloading trolley (2701) are arranged correspondingly, and the second coiler (2602) and the second coil unloading trolley (2702) are arranged correspondingly.

8. A push-pull and continuous dual-purpose strip steel surface cleaning method, characterized in that: The push-pull and continuous dual-purpose strip steel surface cleaning method adopts the push-pull and continuous dual-purpose strip steel surface cleaning production line according to claim 1, and the push-pull and continuous dual-purpose strip steel surface cleaning method comprises the following steps: In the continuous production mode, the strip steel of the first specification passes through the welding machine (5), the first turning pinch roller (6), the first strip steel storage device, the second turning pinch roller (12), the cutting shear (13) and the strip steel surface cleaning device in sequence, and the welding machine (5) welds the two adjacent strip steels of the first specification end to end into one piece; In the push-pull production mode, the strip steel of the second specification passes through the welding machine (5), the first steering pinch roller (6), the second steering pinch roller (12), the cutting shear (13) and the strip steel surface cleaning equipment in sequence, and the strip steel of the second specification does not enter the first strip steel storage equipment.

9. The push-pull and continuous dual-purpose strip steel surface cleaning method according to claim 8, characterized in that: In the process of switching from the continuous production mode to the push-pull production mode, the cutting shear (13) cuts the strip steel of the first specification, and the first strip steel storage device stores a section of the strip steel of the first specification; During the process of switching from the push-pull production mode to the continuous production mode, the welder (5) welds the strip steel of the first specification outside the first strip steel storage device and a section of strip steel of the first specification stored in the first strip steel storage device into one piece.

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