High-strength steel scale breaker

Abstract

The utility model relates to a high-strength steel scale breaker, which is characterized in that at least one group of bending roll system and at least one group of multi-roll straightening roll system are sequentially arranged on a rack along the running direction of strip steel, and the bending roll system comprises an upper bending roll arranged above a strip steel running channel and a lower bending roll arranged below the strip steel running channel; the upper bending roller is provided with a first rolling reduction adjusting mechanism; the multi-roll straightening roll system comprises an upper multi-roll straightening roll arranged above the strip steel operation channel and a lower multi-roll straightening roll arranged below the strip steel operation channel, and the upper multi-roll straightening roll is provided with a second rolling reduction adjusting mechanism. According to the utility model, a scale breaking scheme of a bending roll system-multi-roll straightening roll system is adopted, and the scale breaking effect of strip steel can be improved through multi-pass multi-roll straightening rolls; the rolling reduction of the multi-roll straightening roll system is smaller than that of a bending roll system, surface cracks are not easy to generate, the rolling reduction of each pass can be reasonably distributed, the scale breaking effect of the strip steel is improved, and meanwhile, the surface cracks of the strip steel are effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, and specifically relates to a high-strength steel scale breaking machine. Background Art

[0002] In the post-processing line of cold-rolled strips in the metallurgical industry, since the previous hot rolling process will produce iron oxide scale on the surface of the strip, a descaling machine is generally used to remove the iron oxide scale on the surface of the strip to avoid a large amount of iron oxide belt entering the pickling tank to increase acid consumption. At present, the market demand for high-strength steel is increasing. Due to the material characteristics of high-strength steel, its average elongation at break is smaller than that of ordinary steel grades. When the bending roll of the traditional descaling machine is pressed too much, the surface elongation of the strip may exceed the average elongation at break of the material, thereby generating cracks. Utility Model Content

[0003] The utility model relates to a high-strength steel scale breaking machine, which can at least solve some defects of the prior art.

[0004] The utility model relates to a high-strength steel scale breaking machine, comprising a frame, on which at least one set of bending rollers and at least one set of multi-roller straightening rollers are arranged in sequence along the running direction of the strip steel.

[0005] The bending roller system includes an upper bending roller arranged above the strip running channel and a lower bending roller arranged below the strip running channel, and the upper bending roller is provided with a first pressing amount adjustment mechanism;

[0006] The multi-roller straightening roller system comprises an upper multi-roller straightening roller arranged above the strip steel running channel and a lower multi-roller straightening roller arranged below the strip steel running channel, and the upper multi-roller straightening roller is provided with a second pressing amount adjustment mechanism.

[0007] As one of the embodiments, the high-strength steel scale breaker also includes at least one group of transverse bending and straightening roller systems arranged between the final-stage bending roller system and the first-stage multi-roller straightening roller system, and the transverse bending and straightening roller system includes transverse bending and straightening rollers arranged above the strip running channel, and the transverse bending and straightening rollers are equipped with a third pressure adjustment mechanism.

[0008] As one of the embodiments, the third depression amount adjustment mechanism includes a plurality of transverse straightening depression cylinders arranged in sequence along the axial direction of the transverse straightening roller, the transverse straightening depression cylinders are connected to the roller seats of the corresponding transverse straightening rollers, and at least one of the transverse straightening depression cylinders is provided with a depression amount detection unit.

[0009] As one of the implementation modes, an intermediate steering roller is arranged at the outlet of the transverse bending straightening roller system.

[0010] As one of the embodiments, the first depression amount adjustment mechanism includes a plurality of bending depression cylinders arranged in sequence along the axial direction of the upper bending roller, the bending depression cylinders are connected to the roller seats of the corresponding upper bending rollers, and at least one of the bending depression cylinders is provided with a depression amount detection unit.

[0011] As one of the embodiments, the second down-pressure adjustment mechanism includes a plurality of groups of multi-roller straightening adjustment units arranged in sequence along the axial direction of the upper multi-roller straightening roller, the multi-roller straightening adjustment units include a multi-roller straightening down-pressure cylinder or include a plurality of multi-roller straightening down-pressure cylinders arranged in sequence along the running direction of the strip, and the multi-roller straightening down-pressure cylinder is connected to the roller frame corresponding to the upper multi-roller straightening roller.

[0012] As one of the implementation modes, the multi-roller straightening pressing cylinder is a servo hydraulic cylinder.

[0013] As one of the embodiments, at least one of the upper bending roll, the lower bending roll, the upper multi-roll straightening roll and the lower multi-roll straightening roll is a double-roll structure, and the double-roll structure includes matching working rolls and support rolls.

[0014] The utility model has at least the following beneficial effects: in the utility model, a descaling scheme of a bending roller system-a multi-roller straightening roller system is adopted, and the descaling effect of the strip steel can be improved by using multiple passes of multi-roller straightening rollers; the reduction amount of the multi-roller straightening roller system is smaller than that of the bending roller system, and it is not easy to produce surface cracks. The utility model can reasonably distribute the reduction amount of each pass, improve the descaling effect of the strip steel, and effectively reduce the generation of surface cracks of the strip steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a high-strength steel scale breaker provided in an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the support roller segment;

[0018] Figure 3 It is a schematic diagram of the structure of the support roller segment. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 The utility model provides a high-strength steel descaling machine, comprising a frame, on which at least one set of bending rollers and at least one set of multi-roller straightening rollers are arranged in sequence along the running direction of the strip steel.

[0021] The bending roller system includes an upper bending roller 11 arranged above the strip running channel and a lower bending roller 12 arranged below the strip running channel, and the upper bending roller 11 is equipped with a first pressing amount adjustment mechanism 13;

[0022] The multi-roller straightening roller system includes an upper multi-roller straightening roller 31 arranged above the strip running channel and a lower multi-roller straightening roller 32 arranged below the strip running channel. The upper multi-roller straightening roller 31 is equipped with a second pressing amount adjustment mechanism 33.

[0023] Among them, preferably, Figure 1 An inlet turning roller 41 is arranged at the inlet side of the frame to guide and support the strip steel to ensure the effect of the bending roller system. The inlet turning roller 41 is preferably fixed, and its top surface elevation is preferably 5 to 20 mm lower than the steel wire.

[0024] In one embodiment, the lower bending roller 12 is a fixed structure, and preferably, its top surface elevation is 30 to 60 mm lower than the steel wire. When the upper bending roller 11 is put into operation, the bottom surface elevation of the upper bending roller 11 is lower than the steel wire, and the upper bending roller 11 cooperates with the lower bending roller 12 to achieve bending and descaling of the strip.

[0025] Under the action of the first depression amount adjustment mechanism 13, the upper bending roller 11 can be quickly depressed and opened, and the depression amount of the upper bending roller 11 can be accurately controlled. In one embodiment, the first depression amount adjustment mechanism 13 includes a plurality of bending depression cylinders arranged in sequence along the axial direction of the upper bending roller 11, and the bending depression cylinders are connected to the roller seat of the corresponding upper bending roller 11, and at least one of the bending depression cylinders is equipped with a depression amount detection unit. In this embodiment, a group of first depression amount adjustment mechanisms 13 is equipped with two bending depression cylinders, and the two bending depression cylinders are respectively connected to the bearing seats at both ends of the upper bending roller 11. The above-mentioned depression amount detection unit includes but is not limited to the use of a linear position sensor.

[0026] Preferably, there are multiple bending rollers, and the multiple sets of bending rollers are arranged in sequence along the running direction of the strip. Figure 1In the illustrated solution, two sets of bending roller systems are provided.

[0027] In one embodiment, the lower multi-roller straightening roller 32 is a fixed structure.

[0028] Under the action of the second pressing amount adjustment mechanism 33, the upper multi-roller straightening roller 31 can be quickly pressed down and opened, and the pressing amount of the upper multi-roller straightening roller 31 can be accurately controlled. In one embodiment, the second pressing amount adjustment mechanism 33 includes a plurality of multi-roller straightening adjustment units arranged in sequence along the axial direction of the upper multi-roller straightening roller 31, and the multi-roller straightening adjustment unit includes a multi-roller straightening pressing cylinder or includes a plurality of multi-roller straightening pressing cylinders arranged in sequence along the running direction of the strip, and the multi-roller straightening pressing cylinder is connected to the roller frame corresponding to the upper multi-roller straightening roller 31. Preferably, as Figure 1 The multi-roller straightening adjustment unit includes two multi-roller straightening down cylinders arranged in sequence along the running direction of the strip; preferably, the multi-roller straightening adjustment unit has two groups, which can be arranged close to the operating side end and the transmission side end of the above-mentioned roll frame respectively; in the combination scheme of the above two methods, the four multi-roller straightening down cylinders are correspondingly distributed in a 2*2 matrix, and the four multi-roller straightening down cylinders are preferably respectively connected to the four corners of the above-mentioned roll frame.

[0029] Among them, the above-mentioned multi-roller straightening pressure cylinder is preferably a servo hydraulic cylinder, which can accurately control the pressure reduction amount and improve the flexibility and accuracy of the pressure reduction amount distribution of the overall process of the scale breaker.

[0030] Furthermore, if Figure 1 The upper multi-roller straightening roller 31 is also provided with an upper multi-roller straightening balancing mechanism 34, which can improve the straightening and scaling effect of the multi-roller straightening roller system. The upper multi-roller straightening balancing mechanism 34 preferably includes a plurality of balancing hydraulic cylinders arranged in sequence along the axial direction of the upper multi-roller straightening roller 31.

[0031] In this embodiment, a set of multi-roller straightening roller system is provided.

[0032] In this embodiment, a descaling scheme of a bending roller system-multi-roller straightening roller system is adopted. The descaling effect of the strip steel can be improved by using multiple passes of multi-roller straightening rollers. The reduction amount of the multi-roller straightening roller system is smaller than that of the bending roller system, and surface cracks are not easily generated. In this embodiment, the reduction amount of each pass can be reasonably distributed to improve the descaling effect of the strip steel, while effectively reducing the generation of strip steel surface cracks.

[0033] Preferably, if Figure 1 An outlet steering roller 43 is arranged at the outlet side of the frame to guide and support the strip steel and ensure the effect of the multi-roller straightening roller system. The outlet steering roller 43 is preferably fixed, and its top surface elevation is preferably 5 to 20 mm lower than the steel wire.

[0034] In one embodiment, if Figure 1 The high-strength steel scale breaker also includes at least one group of transverse bending and straightening roller systems arranged between the final bending roller system and the first-stage multi-roller straightening roller system, and the transverse bending and straightening roller system includes a transverse bending and straightening roller 21 arranged above the strip running channel, and the transverse bending and straightening roller 21 is equipped with a third pressure adjustment mechanism 22.

[0035] Under the action of the third depression amount adjustment mechanism 22, the transverse bending straightening roller 21 can be quickly depressed and opened, and the depression amount of the transverse bending straightening roller 21 can be accurately controlled. In one embodiment, the third depression amount adjustment mechanism 22 includes a plurality of transverse bending straightening depression cylinders arranged in sequence along the axial direction of the transverse bending straightening roller 21, and the transverse bending straightening depression cylinders are connected to the roller seats of the corresponding transverse bending straightening rollers 21, and at least one of the transverse bending straightening depression cylinders is equipped with a depression amount detection unit. In this embodiment, a group of third depression amount adjustment mechanisms 22 is equipped with two transverse bending straightening depression cylinders, and the two transverse bending straightening depression cylinders are respectively connected to the bearing seats at both ends of the transverse bending straightening roller 21. The above-mentioned depression amount detection unit includes but is not limited to the use of a linear position sensor.

[0036] The descaling scheme of bending roller system - transverse bending straightening roller system - multi-roller straightening roller system can further reasonably and smoothly distribute the reduction amount of each pass, improve the strip descaling effect, and effectively reduce the occurrence of cracks on the strip surface.

[0037] In this embodiment, a set of transverse bending straightening rollers is provided.

[0038] More preferably, if Figure 1 The outlet of the horizontal bending straightening roller system is provided with an intermediate steering roller 42, which can guide and support the strip steel to ensure the descaling effect. The intermediate steering roller 42 is preferably fixed, and its top surface elevation is preferably 5 to 20 mm lower than the steel wire.

[0039] In the above design, after the upper bending roll 11, the transverse bending straightening roll 21 and the upper multi-roller straightening roll 31 are quickly opened, the strip passing line does not contact any roller system of the scale breaker.

[0040] In one embodiment, at least one of the upper bending roller 11, the lower bending roller 12, the transverse bending straightening roller 21, the upper multi-roller straightening roller 31 and the lower multi-roller straightening roller 32 is an integral roller box structure, which can be pulled out as a whole along the roller body axis, which is convenient for installation and maintenance. Preferably, the upper bending roller 11, the lower bending roller 12, the transverse bending straightening roller 21, the upper multi-roller straightening roller 31 and the lower multi-roller straightening roller 32 are all integral roller box structures.

[0041] In one embodiment, at least one of the upper bending roller 11, the lower bending roller 12, the upper multi-roller straightening roller 31 and the lower multi-roller straightening roller 32 is a double-roller structure, and the double-roller structure includes a matching working roller and a support roller. Preferably, the upper bending roller 11, the lower bending roller 12, the upper multi-roller straightening roller 31 and the lower multi-roller straightening roller 32 are all double-roller structures; the above-mentioned transverse bending straightening roller 21 is also preferably a double-roller structure.

[0042] The working roll is used to contact the strip steel, and the supporting roll is located on the side of the working roll away from the strip steel running channel and is in contact with the working roll to support the working roll.

[0043] Preferably, one working roll is equipped with two support rolls.

[0044] In one embodiment, if Figure 2 The support roller includes a plurality of support roller segments 100, each of which is coaxially connected in series, wherein each support roller segment 100 includes a segment roller shaft 1002 and a segment roller body 1001, each segment roller shaft 1002 is coaxially connected in series to form a support roller shaft 101, and there is a certain distance between adjacent segment roller bodies 1001. In this structure, the length of the support roller can be adjusted according to actual conditions (such as design width, etc.), and the support roller is easy to repair and maintain, and the support roller segments 100 that are prone to wear / failure can be replaced in a targeted manner.

[0045] Furthermore, if Figure 2 In the two support rollers of the same group, the support roller segments 100 of the two support rollers are arranged in a staggered manner. More specifically, there is an inter-roller spacing area between each coaxially adjacent two segmented roller bodies 1001, and the inter-roller spacing areas are sequentially spaced along the support roller axis 101. In other words, the plane where the end faces of the two segmented roller bodies 1001 adjacent to the inter-roller spacing area are located will intersect with the same segmented roller body 1001 of the other support roller. The above structure can eliminate the support blind area that may occur due to the segmented design of the support roller, and ensure the support effect on the working roller.

[0046] In one embodiment, if Figure 2 Each support roller includes a first support roller segment with a longer length and a second support roller segment with a shorter length. The number and ratio of the first support roller segment and the second support roller segment can be designed according to actual conditions. Figure 2 In the illustrated embodiment, a first support roller segment and a plurality of second support roller segments (the ratio of the two includes but is not limited to 1:6) are included, and the first support roller segment is located at one end of the support roller.

[0047] Preferably, if Figure 2 and Figure 3At least part of the support roller segments 100 are blowing rollers, at least one end of the blowing roller is provided with an air blowing mechanism, a compressed air supply channel 102 is provided in the support roller shaft 101 and one end of the support roller shaft 101 is connected to a compressed air source, the compressed air supply channel 102 extends to the segment roller shaft 1002 of each blowing roller and is connected to each of the air blowing mechanisms.

[0048] Based on the above structure, the support roller has a purging function, which can purge the iron oxide scale produced by the strip steel descaling, thereby improving the descaling and dephosphorization effect. Since the support roller is closer to the strip steel, a better purging effect can be obtained; and the support roller moves with the working roller, which can avoid the problem of scratching the strip steel easily by setting up a separate purging device.

[0049] It is preferred that each support roller segment 100 is a blowing roller; and it is preferred that air blowing mechanisms are provided at both ends of the blowing roller.

[0050] Preferably, the air blowing mechanism comprises a plurality of air blowing units 1003 arranged at intervals along the circumference of the blowing roller, which can ensure the blowing effect, especially ensure that there is always an air blowing unit 1003 close to the working area of ​​the working roller.

[0051] The above-mentioned air blowing unit 1003 can be a compressed air nozzle opened at the end of the blowing roller, or it can be a compressed air nozzle arranged at the end of the blowing roller. The axis / blowing direction of the compressed air nozzle / nozzle is parallel to the axis of the blowing roller, or is inclined toward the outside of the roller relative to the axis of the blowing roller.

[0052] The support roller 101 may be provided with an axial through hole to form the compressed air supply channel 102, and one end of the support roller 101 may be connected to a compressed air pipe via a rotary joint. Each segment roller 1002 is provided with an axial through hole, and the axial through holes of each segment roller 1002 are connected in series to form the compressed air supply channel 102.

[0053] The connection between the segmented rollers 1002 includes but is not limited to detachable connection forms such as flange connection. A sealing ring may be provided at the joint of two adjacent segmented rollers 1002, and / or a sealing sleeve may be provided at the joint of two adjacent segmented rollers 1002 to ensure the sealing of the connection between the segmented rollers 1002 and the smooth flow of the compressed air supply channel 102. For the setting of the sealing sleeve, optionally, a mounting groove is provided at the end of the segmented roller 1002, and the two ends of the sealing sleeve are respectively embedded in the mounting grooves at the ends of the two adjacent segmented rollers 1002; wherein, the axial through hole in the segmented roller 1002 preferably adopts a stepped through hole with a small aperture in the middle and a large aperture at both ends, and the large aperture sections at both ends of the axial through hole correspondingly constitute two mounting grooves, the outer diameter of the sealing sleeve is adapted to the large aperture of the axial through hole, and the inner diameter of the sealing sleeve is adapted to the small aperture of the axial through hole (larger than the small aperture, equal to the small aperture, or slightly smaller than the small aperture is feasible).

[0054] like Figure 3 A transition channel 1004 may be provided in the segmented roller body 1001 and the segmented roller shaft 1002 of the purge roller to connect the compressed air supply channel 102 and the air purge unit 1003 .

[0055] The compressed air sprayed between the segmented roller bodies 1001 can form an air curtain around the working roller, which can reduce the scattering of scale-breaking dust, thereby reducing dust pollution, extending the service life of components such as support rollers, reducing the maintenance frequency of scale breakers, and improving the on-site working environment; the compressed air acting on the surface of the strip can also loosen and blow away the oxidized iron scale.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength steel scale breaker, comprising a frame, characterized in that: At least one set of bending rollers and at least one set of multi-roller straightening rollers are arranged in sequence on the frame along the running direction of the strip steel. The bending roller system includes an upper bending roller arranged above the strip running channel and a lower bending roller arranged below the strip running channel, and the upper bending roller is provided with a first pressing amount adjustment mechanism; The multi-roller straightening roller system comprises an upper multi-roller straightening roller arranged above the strip steel running channel and a lower multi-roller straightening roller arranged below the strip steel running channel, and the upper multi-roller straightening roller is provided with a second pressing amount adjustment mechanism.

2. The high-strength steel scale breaker according to claim 1, characterized in that: It also includes at least one group of transverse straightening roller systems arranged between the final bending roller system and the first-stage multi-roller straightening roller system, wherein the transverse straightening roller system includes transverse straightening rollers arranged above the strip running channel, and the transverse straightening rollers are equipped with a third pressure adjustment mechanism.

3. The high-strength steel scale breaker according to claim 2, characterized in that: The third depression amount adjustment mechanism includes a plurality of transverse straightening depression cylinders arranged in sequence along the axial direction of the transverse straightening roller, the transverse straightening depression cylinders are connected to the roller seats of the corresponding transverse straightening rollers, and at least one of the transverse straightening depression cylinders is provided with a depression amount detection unit.

4. The high-strength steel scale breaker according to claim 2, characterized in that: An intermediate steering roller is arranged at the outlet of the transverse bending straightening roller system.

5. The high-strength steel scale breaker according to claim 1, characterized in that: The first pressing amount adjustment mechanism comprises a plurality of bending pressing cylinders sequentially arranged along the axial direction of the upper bending roller, the bending pressing cylinders are connected to the roller seats of the corresponding upper bending rollers, and at least one of the bending pressing cylinders is provided with a pressing amount detection unit.

6. The high-strength steel scale breaker according to claim 1, characterized in that: The second down-pressure adjustment mechanism includes a plurality of groups of multi-roller straightening adjustment units arranged in sequence along the axial direction of the upper multi-roller straightening roller, the multi-roller straightening adjustment units include a multi-roller straightening down-pressure cylinder or include a plurality of multi-roller straightening down-pressure cylinders arranged in sequence along the running direction of the strip, and the multi-roller straightening down-pressure cylinder is connected to the roller frame corresponding to the upper multi-roller straightening roller.

7. The high-strength steel scale breaker according to claim 6, characterized in that: The multi-roller straightening pressing cylinder is a servo hydraulic cylinder.

8. The high-strength steel scale breaker according to claim 1, characterized in that: At least one of the upper bending roller, the lower bending roller, the upper multi-roller straightening roller and the lower multi-roller straightening roller is a double-roller structure, and the double-roller structure includes a matching working roller and a supporting roller.

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