Multi-roller type strip steel cold rolling leveling machine

Abstract

The utility model discloses a multi-roller type strip steel cold rolling leveling machine which comprises a support, a power wheel, a fast roller and a low-speed roller. A horizontal fast roller and a horizontal low-speed roller are directly or indirectly matched with the support in a rotating mode, the opposite faces of two sets of support bodies of the support are each fixedly provided with a fixing block of a blocky structure, two sets of extrusion rollers are matched between the two sets of fixing blocks in a rotating mode through bearings, in the two sets of extrusion rollers, the roller close to the fast roller is a fast driven roller, and the roller close to the low-speed roller is a low-speed driven roller. The support is rotationally matched with a power wheel through a bearing and a shaft rod, a driving chain wheel is coaxially fixed to the power wheel, a fast chain wheel is fixed to the same side, close to the driving chain wheel, of the fast roller, and the driving chain wheel and the fast chain wheel are meshed in a chain transmission mode. One end, far away from the quick chain wheel, of the quick roller provides rotating power for the low-speed roller through the low-speed transmission mechanism in a torque increasing and rotating speed reducing manner; the leveling device has the beneficial effect that high-ductility strip steel and low-ductility strip steel can be leveled at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of strip steel leveling, and particularly relates to a multi-roller type strip steel cold rolling leveling machine. Background Art

[0002] Cold-rolled steel strip is one type of steel strip. Cold-rolled steel strip is made of hot-rolled coil and is rolled below the recrystallization temperature at room temperature. The rolled cold-rolled steel strip needs to be leveled. The existing leveling is usually completed by a leveling machine. After the cold-rolled steel strip is leveled by the leveling machine, the flatness of the cold-rolled steel strip can be improved.

[0003] Existing leveling machines (such as the patent document with publication number CN217432650U) are usually equipped with only two sets of corresponding leveling rollers (or conveyor belts), one set of leveling rollers is located on the upper side of the steel strip, and the other set of leveling rollers is located on the lower side of the steel strip. The two sets of leveling rollers cooperate with each other to squeeze the steel strip, so that the steel strip can achieve a flat effect. The speed and torque of the rollers of the above-mentioned leveling machines are usually not adjustable. The high-speed and low-torque rollers are not very effective in leveling low-ductility strip steel (steel with poor ductility). When flattening high-elongation steel strip (strip steel with good ductility), the low-speed and high-torque rollers are leveling high-elongation steel strip (strip steel with good ductility). The high-elongation steel strip does not have high requirements for leveling force and torque. Because the roller speed is too low, it takes too long to level the high-elongation steel strip, reducing the leveling efficiency. Therefore, the existing technology requires a cold rolling leveling machine that can level both low-elongation steel strip and high-elongation steel strip at the same time. Utility Model Content

[0004] The utility model aims to provide a multi-roller type cold-rolling and leveling machine for strip steel, so as to solve the technical problem in the above-mentioned background technology that low-elongation strip steel and high-elongation strip steel cannot be leveled at the same time.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A multi-roller cold-rolling leveler for strip steel comprises a support, a power wheel, a fast roller and a low-speed roller; the main body of the support comprises two groups of vertical hollow frames, and the two groups of frames of the support are directly or indirectly rotatably matched with horizontal fast rollers and low-speed rollers, and the two groups of frames of the support are respectively fixed with a fixed block of a block-shaped structure on opposite surfaces of the two groups of frames of the support, and two groups of extrusion rollers are rotatably matched with bearings between the two groups of fixed blocks, and the two groups of extrusion rollers close to the fast roller are fast driven rollers, and the two groups of extrusion rollers close to the low-speed roller are low-speed driven rollers; the support is rotatably matched with a power wheel by bearings and shaft rods, and a driving sprocket is coaxially fixed on the power wheel, and a fast sprocket is fixed on the same side of the fast roller close to the driving sprocket, and the driving sprocket and the fast sprocket are meshed by chain drive, and the end of the fast roller away from the fast sprocket provides rotational power to the low-speed roller through a low-speed transmission mechanism by increasing torque and reducing rotation speed.

[0007] Further: the low-speed transmission mechanism includes: a first transmission wheel, a second transmission wheel, a transmission transverse axis, a third transmission wheel, and a low-speed driven wheel; the first transmission wheel, the second transmission wheel, the third transmission wheel, and the low-speed driven wheel are all sprockets, wherein the first transmission wheel is coaxially fixed to the end of the fast roller away from the fast sprocket, the transmission transverse axis is an axle rod, which is rotatably fitted between two groups of fixed blocks using a bearing, the second transmission wheel is coaxially fixed to one end of the transmission transverse axis close to the first transmission wheel, and the third transmission wheel is coaxially fixed to the other end; the low-speed roller is coaxially fixed to the same end of the third transmission wheel, and the first transmission wheel and the second transmission wheel, as well as the third transmission wheel and the low-speed driven wheel are all meshed through chain transmission; wherein the number of teeth of the first transmission wheel is greater than the number of teeth of the second transmission wheel, and the number of teeth of the third transmission wheel is greater than the number of teeth of the low-speed driven wheel.

[0008] Furthermore: in order to prevent the transmission transverse axis from interfering with the rotation of the fast driven roller and the low-speed driven roller, the transmission transverse axis is arranged in parallel between the fast driven roller and the low-speed driven roller without contact.

[0009] Furthermore: in order to be able to adaptively adjust the spacing between the fast roller and the fast driven roller and the spacing between the low-speed roller and the low-speed driven roller according to the thickness of the strip to be leveled, the bracket rotates to match the fast roller and the low-speed roller through a spacing adjustment mechanism; the spacing adjustment mechanism includes: a slide rod, a first slider, a second slider, a spring, and a screw; the two ends of the fast roller are respectively rotationally matched with the first slider of a block structure, and the two ends of the low-speed roller are respectively rotationally matched with the second slider of a block structure; at least one group of vertical slide rods are fixed on the two groups of fixed blocks, the first slider and the second slider are slidingly matched on the slide rod on the same side thereof, and the first slider and the second slider are both threadedly matched with a screw, and the screw is rotationally matched on the bracket through a bearing.

[0010] Furthermore, in order to facilitate the rotation of the screw, a handle with a rod-like structure or a wheel-like structure is fixed to the outer end of the screw that is threadedly matched on the first slider and the second slider.

[0011] Further: in order to ensure that after the spacing adjustment mechanism is adjusted, each group of sprockets in the low-speed transmission mechanism maintains transmission engagement, a tensioner is used to tighten the chain between the driving sprocket, the fast sprocket, the first transmission wheel, the second transmission wheel, the third transmission wheel, and the low-speed driven wheel, and the tensioner includes: a rotating shaft, a deflection rod, a tensioning sprocket, and a torsion spring; the rotating shaft is horizontally fixed on the bracket, and a deflection rod of a rod-shaped structure is rotatably matched on the rotating shaft, and a tensioning sprocket is rotatably matched at the end of the deflection rod away from the rotating shaft, and a torsion spring is embedded on the rotating shaft, one end of the torsion spring is fixedly connected to the rotating shaft, and the other end of the torsion spring is fixedly connected to the deflection rod; the meshed chains between the driving sprocket, the fast sprocket, the first transmission wheel, the second transmission wheel, the third transmission wheel, and the low-speed driven wheel are meshed on the tensioning sprocket of the tensioner adjacent to them.

[0012] Furthermore: in order to prevent stains from adhering and affecting the flatness of the surfaces of the fast roller and the low-speed roller, resulting in poor strip leveling, the bracket is fixed with a scraper on each side of the fast roller and the low-speed roller, and the blade surface of the scraper is tangent to the roller surface of the fast roller and the low-speed roller.

[0013] Further: In order to prevent the spacing between the fast roller and the fast driven roller and the spacing between the low-speed roller and the low-speed driven roller from being adjusted too small, causing the machine to be forced to level and be damaged, a spring is provided between the first slider, the second slider and the fixed block. When the spring is compressed to the shortest state, the spacing between the fast roller and the fast driven roller and the spacing between the low-speed roller and the low-speed driven roller are the minimum spacing.

[0014] In summary, the utility model has the following beneficial effects:

[0015] ① It can level high-strength strip steel and low-strength strip steel at the same time: through the establishment of fast rollers, low-speed rollers, and low-speed transmission mechanisms, the power wheel drives the fast sprocket to rotate at a faster speed through the driving sprocket and chain, and then the fast roller follows the fast sprocket to rotate at a faster speed, and then the high-strength strip steel between the fast roller and the fast driven roller is leveled and rolled; because the high-strength strip steel has good ductility, it can be rolled relatively quickly. When the fast roller rotates, the low-speed driven wheel is driven to rotate by the first transmission wheel, the second transmission wheel, the transmission cross shaft, the third transmission wheel and the chain in turn. The low-speed driven wheel will drive the low-speed roller to rotate in the form of low speed and high torque, and then the low-strength strip steel that is difficult to level is leveled more slowly, and the high-torque low-speed roller will also increase the feeding force of the low-strength strip steel, further ensuring the leveling strength of the low-strength strip steel. The leveling operations of high-strength strip steel and low-strength strip steel can be carried out at the same time.

[0016] 2. The leveling spacing can be adjusted according to the thickness of the leveled strip when necessary: ​​by setting up a spacing adjustment mechanism, the handle on the side of the fast roller or the low-speed roller to be adjusted is rotated, and the handle drives the matching screw to rotate. Because the screw is rotatably matched on the bracket through the bearing and is threadedly connected to the first slider or the second slider, the height of the first slider or the second slider can be adjusted, and then the height of the fast roller or the low-speed roller matched on the first slider or the second slider can be adjusted, and then the spacing between the fast roller and the fast driven roller and the spacing between the low-speed roller and the low-speed driven roller can be adjusted.

[0017] 3. The surface of the fast roller and the low-speed roller can be cleaned and purified to ensure its flatness: through the setting of the scraper, because its blade surface is tangent to the roller surface of the fast roller and the low-speed roller, the scraper can remove the stains accidentally contaminated on the surface of the fast roller and the low-speed roller, so as to avoid the stains from affecting the flatness of the surface of the fast roller and the low-speed roller, so as to achieve poor leveling effect of the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the low-speed transmission mechanism of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the center distance adjustment mechanism of the utility model;

[0021] Figure 4 yes Figure 1 A magnified view of the structure in the middle;

[0022] Figure 5 This is a schematic diagram of the principle structure of the tensioner in the utility model;

[0023] Figure 6 The utility model is a schematic diagram of the use structure of the utility model for performing leveling operations of two steel belts at the same time.

[0024] In the figure, 1, bracket; 2, power wheel; 3, fast roller; 4, low-speed roller; 5, fixed block; 6, fast driven roller; 7, low-speed driven roller; 8, low-speed transmission mechanism; 9, spacing adjustment mechanism; 10, tensioner; 11, high-extension strip steel; 12, low-extension strip steel; 13, scraper; 21, driving sprocket; 31, fast sprocket; 81, first transmission wheel; 82, second transmission wheel; 83, transmission cross shaft; 84, third transmission wheel; 85, low-speed driven wheel; 91, slide rod; 92, first slider; 93, second slider; 94, spring; 95, screw rod; 96, handle; 101, shaft; 102, deflection rod; 103, tension sprocket; 104, torsion spring. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Example:

[0027] See also Figure 1-Figure 6 , the utility model provides a technical solution:

[0028] A multi-roller cold-rolling leveler for strip steel comprises a support 1, a power wheel 2, a fast roller 3 and a low-speed roller 4; the main body of the support 1 is two groups of vertical hollow frames, and the two groups of frames of the support 1 are directly or indirectly rotatably matched with horizontal fast rollers 3 and low-speed rollers 4, and the two groups of frames of the support 1 are respectively fixed with a fixed block 5 of a block-shaped structure on opposite surfaces, and two groups of extrusion rollers are rotatably matched between the two groups of fixed blocks 5 by bearings, and the two groups of extrusion rollers close to the fast roller 3 are fast driven rollers 6, and the ones close to the low-speed roller 4 are low-speed driven rollers 7; the support 1 is rotatably matched with a power wheel 2 by bearings and shafts, and a driving sprocket 21 is coaxially fixed on the power wheel 2, and a fast sprocket 31 is fixed on the same side of the fast roller 3 close to the driving sprocket 21, and the driving sprocket 21 and the fast sprocket 31 are meshed by chain drive, and the end of the fast roller 3 away from the fast sprocket 31 provides rotational power for the low-speed roller 4 through a low-speed transmission mechanism 8 by increasing torque and reducing rotation speed.

[0029] The low-speed transmission mechanism 8 includes: a first transmission wheel 81, a second transmission wheel 82, a transmission transverse shaft 83, a third transmission wheel 84, and a low-speed driven wheel 85; the first transmission wheel 81, the second transmission wheel 82, the third transmission wheel 84, and the low-speed driven wheel 85 are all sprockets, wherein the first transmission wheel 81 is coaxially fixed to the end of the fast roller 3 away from the fast sprocket 31, the transmission transverse shaft 83 is a shaft rod, which adopts a bearing to rotate between the two sets of fixed blocks 5, and the transmission transverse shaft 83 is close to the first transmission wheel 81. A second transmission wheel 82 is coaxially fixed to one end of a transmission wheel 81, and a third transmission wheel 84 is coaxially fixed to the other end; a low-speed driven wheel 85 is coaxially fixed to the same end of the low-speed roller 4 close to the third transmission wheel 84, and the first transmission wheel 81 and the second transmission wheel 82, and the third transmission wheel 84 and the low-speed driven wheel 85 are all meshed through chain transmission; the number of teeth of the first transmission wheel 81 is greater than the number of teeth of the second transmission wheel 82, and the number of teeth of the third transmission wheel 84 is greater than the number of teeth of the low-speed driven wheel 85.

[0030] In order to prevent the transmission transverse shaft 83 from interfering with the rotation of the fast driven roller 6 and the low-speed driven roller 7 , the transmission transverse shaft 83 is arranged in parallel between the fast driven roller 6 and the low-speed driven roller 7 without contacting them.

[0031] In order to be able to adaptively adjust the spacing between the fast roller 3 and the fast driven roller 6 and the spacing between the low-speed roller 4 and the low-speed driven roller 7 according to the required thickness of the flattened strip, the bracket 1 is rotated to cooperate with the fast roller 3 and the low-speed roller 4 through a spacing adjustment mechanism 9; the spacing adjustment mechanism 9 includes: a slide bar 91, a first slider 92, a second slider 93, a spring 94, and a screw 95; the two ends of the fast roller 3 are respectively rotationally cooperated with the first slider 92 of a block structure, and the two ends of the low-speed roller 4 are respectively rotationally cooperated with the second slider 93 of a block structure; at least one group of vertical slide bars 91 is fixed on the two groups of fixed blocks 5, the first slider 92 and the second slider 93 are slidingly cooperated on the slide bar 91 on the same side thereof, and the first slider 92 and the second slider 93 are both threadedly cooperated with a screw 95, and the screw 95 is rotationally cooperated on the bracket 1 through a bearing.

[0032] In order to facilitate the rotation of the screw rod 95 , a rod-shaped or wheel-shaped rotating handle 96 is fixed to the outer end of the screw rod 95 which is threadedly matched on the first slider 92 and the second slider 93 .

[0033] In order to ensure that after the spacing adjustment mechanism 9 is adjusted, each group of sprockets in the low-speed transmission mechanism 8 maintains transmission meshing, the chains between the driving sprocket 21, the fast sprocket 31, the first transmission wheel 81, the second transmission wheel 82, the third transmission wheel 84, and the low-speed driven wheel 85 are tightened by a tensioner 10, and the tensioner 10 includes: a rotating shaft 101, a deflection rod 102, a tensioning sprocket 103, and a torsion spring 104; the rotating shaft 101 is horizontally fixed on the bracket, and a rod-shaped knot is rotatably matched on the rotating shaft 101. The deflection rod 102 of the structure has a deflection rod 102, and the end of the deflection rod 102 away from the rotating shaft 101 is rotatably matched with a tensioning sprocket 103. A torsion spring 104 is embedded on the rotating shaft 101. One end of the torsion spring 104 is fixedly connected to the rotating shaft 101, and the other end of the torsion spring 104 is fixedly connected to the deflection rod 102; the chains meshed between the driving sprocket 21, the fast sprocket 31, the first transmission wheel 81, the second transmission wheel 82, the third transmission wheel 84, and the low-speed driven wheel 85 are meshed on the tensioning sprocket 103 of the tensioner 10 adjacent to them.

[0034] In order to prevent stains from adhering and affecting the surface flatness of the fast roller 3 and the low-speed roller 4, resulting in poor strip leveling effect, the bracket 1 is fixed with a scraper 13 on the side of the fast roller 3 and the low-speed roller 4, and the blade surface of the scraper 13 is tangent to the roller surface of the fast roller 3 and the low-speed roller 4.

[0035] In order to prevent the spacing between the fast roller 3 and the fast driven roller 6 and the spacing between the low-speed roller 4 and the low-speed driven roller 7 from being too small during adjustment, resulting in damage to the machine due to forced leveling, a spring 94 is provided between the first slider 92, the second slider 93 and the fixed block 5. When the spring 94 is compressed to the shortest state, the spacing between the fast roller 3 and the fast driven roller 6 and the spacing between the low-speed roller 4 and the low-speed driven roller 7 are the minimum spacing.

[0036] Brief description of the usage process:

[0037] When using, Figure 6 As shown, the high-elongation steel strip 11 (the high-elongation steel strip 11 is a steel strip with good ductility) is placed in the gap between the fast roller 3 and the fast driven roller 6, and the low-elongation steel strip 12 (the low-elongation steel strip 12 is a steel strip with poor ductility) is placed in the gap between the low-speed roller 4 and the low-speed driven roller 7, and the power wheel 2 is connected to a motor or other rotating power, and the power wheel 2 is driven by the rotating power to rotate, and the fast sprocket 31 is driven by the driving sprocket 21 and the chain to rotate at a faster speed, and then the fast roller 3 follows the fast sprocket 31 to rotate at a faster speed, and then the high-elongation steel strip 11 between the fast roller 3 and the fast driven roller 6 is flattened and rolled; because the high-elongation steel strip 11 has good ductility, it can be rolled at a faster speed.

[0038] When the fast roller 3 rotates, the low-speed driven wheel 85 is driven to rotate through the first transmission wheel 81, the second transmission wheel 82, the transmission cross shaft 83, the third transmission wheel 84 and the chain in sequence. Because the number of teeth of the first transmission wheel 81 is greater than the number of teeth of the second transmission wheel 82, and the number of teeth of the third transmission wheel 84 is greater than the number of teeth of the low-speed driven wheel 85, the low-speed driven wheel 85 will drive the low-speed roller 4 to rotate in the form of low speed and high torque, thereby performing a slower leveling operation on the low-elongation strip steel 12 that is more difficult to level, and the high-torque low-speed roller 4 will also increase the feeding force of the low-elongation strip steel 12, further ensuring the leveling strength of the low-elongation strip steel 12, and the leveling operations of the high-elongation strip steel 11 and the low-elongation strip steel 12 can be carried out simultaneously.

[0039] When it is necessary to adaptively adjust the spacing between the fast roller 3 and the fast driven roller 6 and the spacing between the low-speed roller 4 and the low-speed driven roller 7 according to the thickness of the leveled strip, rotate the handle 96 on the side of the fast roller 3 or the low-speed roller 4 to be adjusted, and the handle 96 drives the matching screw 95 to rotate. Because the screw 95 is rotatably matched on the bracket 1 through the bearing and is threadedly connected to the first slider 92 or the second slider 93, the height of the first slider 92 or the second slider 93 can be adjusted, and then the height of the fast roller 3 or the low-speed roller 4 matched on the first slider 92 or the second slider 93 can be adjusted, and then the spacing between the fast roller 3 and the fast driven roller 6 and the spacing between the low-speed roller 4 and the low-speed driven roller 7 can be adjusted.

[0040] When the spacing between the fast roller 3 and the fast driven roller 6 and the spacing between the low-speed roller 4 and the low-speed driven roller 7 are adjusted, the spacing between the corresponding driving sprocket 21, the fast sprocket 31, the first transmission wheel 81, the second transmission wheel 82, the third transmission wheel 84, and the low-speed driven wheel 85 will also change accordingly. At this time, the tensioner 10 plays its function. The tensioning sprocket 103 in the tensioner 10 squeezes and contracts the meshed chain under the elastic force of the torsion spring 104, so that when the spacing between the two groups of sprockets meshing the chain is adjusted, there is still adjustment space, and the chain is tightened to ensure its meshing transmission.

[0041] Because the blade surface of the scraper is tangent to the roller surfaces of the fast roller 3 and the low-speed roller 4, the stains accidentally contaminated on the surfaces of the fast roller 3 and the low-speed roller 4 can be scraped off to prevent the stains from affecting the flatness of the surfaces of the fast roller 3 and the low-speed roller 4, resulting in a poor leveling effect of the strip.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A multi-roller steel strip cold rolling and leveling machine, comprising a support (1), a power wheel (2), a fast roller (3), and a low-speed roller (4); characterized in that: The main body of the support (1) is two groups of vertical hollow frames, and a horizontal fast roller (3) and a low-speed roller (4) are directly or indirectly rotatably matched between the two groups of frames of the support (1). A fixed block (5) of a block structure is fixed on each of the opposite surfaces of the two groups of frames of the support (1). Two groups of squeezing rollers are rotatably matched between the two groups of fixed blocks (5) using bearings. Among the two groups of squeezing rollers, the one close to the fast roller (3) is a fast driven roller (6), and the one close to the low-speed roller (4) is a low-speed driven roller (7); The frame (1) is provided with a power wheel (2) which is rotatably matched with a bearing and a shaft rod. A driving sprocket (21) is coaxially fixed on the power wheel (2). A fast sprocket (31) is fixed on the same side of the fast roller (3) as the driving sprocket (21). The driving sprocket (21) and the fast sprocket (31) are meshed by chain transmission. The end of the fast roller (3) which is away from the fast sprocket (31) provides rotational power to the low-speed roller (4) through a low-speed transmission mechanism (8) by increasing torque and reducing rotational speed.

2. The multi-roller type cold rolling and leveling machine for steel strip according to claim 1, characterized in that: The low-speed transmission mechanism (8) comprises: a first transmission wheel (81), a second transmission wheel (82), a transmission transverse shaft (83), a third transmission wheel (84), and a low-speed driven wheel (85); the first transmission wheel (81), the second transmission wheel (82), the third transmission wheel (84), and the low-speed driven wheel (85) are all sprockets, wherein the first transmission wheel (81) is coaxially fixed to an end of the fast roller (3) away from the fast sprocket (31), the transmission transverse shaft (83) is a shaft rod, which is rotatably matched between the two sets of fixed blocks (5) by a bearing, and the transmission transverse shaft (83) is close to the fast roller (3). A second transmission wheel (82) is coaxially fixed to one end near the first transmission wheel (81), and a third transmission wheel (84) is coaxially fixed to the other end; a low-speed driven wheel (85) is coaxially fixed to the same end of the low-speed roller (4) near the third transmission wheel (84), and the first transmission wheel (81) and the second transmission wheel (82), and the third transmission wheel (84) and the low-speed driven wheel (85) are meshed through chain transmission; the number of teeth of the first transmission wheel (81) is greater than the number of teeth of the second transmission wheel (82), and the number of teeth of the third transmission wheel (84) is greater than the number of teeth of the low-speed driven wheel (85).

3. The multi-roller type cold rolling and leveling machine for steel strip according to claim 2, characterized in that: The transmission transverse shaft (83) is arranged in parallel and without contact between the fast driven roller (6) and the low-speed driven roller (7).

4. The multi-roller type cold rolling and leveling machine for steel strip according to claim 1, characterized in that: The bracket (1) is rotatably matched with the fast roller (3) and the low-speed roller (4) through a spacing adjustment mechanism (9); the spacing adjustment mechanism (9) comprises: a slide bar (91), a first slider (92), a second slider (93), a spring (94), and a screw (95); the two ends of the fast roller (3) are respectively rotatably matched with the first slider (92) of a block structure, and the two ends of the low-speed roller (4) are respectively rotatably matched with the second slider (93) of a block structure; at least one set of vertical slide bars (91) is fixed on the two sets of fixed blocks (5), the first slider (92) and the second slider (93) are slidably matched on the slide bar (91) on the same side thereof, and a screw (95) is threadedly matched on the first slider (92) and the second slider (93), and the screw (95) is rotatably matched on the bracket (1) through a bearing.

5. The multi-roller type cold rolling and leveling machine for steel strip according to claim 4, characterized in that: The outer ends of the screw rods (95) threadedly matched on the first slider (92) and the second slider (93) are both fixed with a rotating handle (96) of a rod-shaped structure or a wheel-shaped structure.

6. The multi-roller type cold rolling and leveling machine for steel strip according to claim 2, characterized in that: The chains between the driving sprocket (21), the fast sprocket (31), the first transmission wheel (81), the second transmission wheel (82), the third transmission wheel (84), and the low-speed driven wheel (85) are all tightened by a tensioner (10), the tensioner (10) comprising: a rotating shaft (101), a deflection rod (102), a tensioning sprocket (103), and a torsion spring (104); the rotating shaft (101) is horizontally fixed on a bracket, a deflection rod (102) of a rod-shaped structure is rotatably matched on the rotating shaft (101), and the deflection rod (102) is away from the rotating shaft. The end of one side of the rotating shaft (101) is rotatably matched with a tensioning sprocket (103), a torsion spring (104) is externally embedded on the rotating shaft (101), one end of the torsion spring (104) is fixedly connected to the rotating shaft (101), and the other end of the torsion spring (104) is fixedly connected to the deflection rod (102); the chains meshed between the driving sprocket (21), the fast sprocket (31), the first transmission wheel (81), the second transmission wheel (82), the third transmission wheel (84), and the low-speed driven wheel (85) are meshed on the tensioning sprocket (103) of the tensioner (10) adjacent thereto.

7. The multi-roller type cold rolling and leveling machine for steel strip according to claim 1, characterized in that: The support (1) is provided with a scraper (13) fixed on the side of each of the fast roller (3) and the slow roller (4); the blade surface of the scraper (13) is tangent to the roller surface of the fast roller (3) and the slow roller (4).

8. The multi-roller type cold rolling and leveling machine for steel strip according to claim 4, characterized in that: A spring (94) is provided between the first slider (92), the second slider (93) and the fixed block (5); when the spring (94) is compressed to the shortest state, the distance between the fast roller (3) and the fast driven roller (6), and the distance between the low-speed roller (4) and the low-speed driven roller (7) are the minimum distances.

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