A steel strip surface degreasing device and control method thereof

Abstract

The present application belongs to the technical field of steel strip processing, and discloses a steel strip surface oil removal device and a control method thereof. A distance measuring mechanism is arranged in front of an oil scraping mechanism to measure the heights of the upper and lower surfaces of the steel strip at multiple positions in the left-right direction, and a plurality of scrapers that can independently move up and down are used to replace the integral scraper, so that the height of each scraper can be adjusted according to the measurement result of the distance measuring mechanism, so that each scraper can better fit the steel strip surface, and even if the steel strip surface is uneven, a good oil scraping effect can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of steel strip processing, and in particular to a steel strip surface oil removal device and a control method thereof. Background Art

[0002] During the rolling process of the steel strip, rolling oil is added, resulting in oil stains on the surface of the steel strip after rolling. If the oil stains are not cleaned, the steel strip will slip between layers when it is rolled, making it difficult to roll evenly, and the surface of the steel strip will be easily scratched during transportation, affecting the surface quality. Therefore, it is necessary to clean the oil stains on the surface of the steel strip before rolling.

[0003] At present, the steel strip surface degreasing device and the cleaning device are generally used together to clean the oil stains on the steel strip surface. After the steel strip surface degreasing device is used to remove the oil stains initially, the cleaning device is used to further remove the residual oil stains. Among them, the scraper type degreasing device is a commonly used steel strip surface degreasing device. Its working principle is to use the upper and lower scrapers to contact the upper and lower surfaces of the steel strip and drive the steel strip to move along the length direction, so that the scrapers can scrape off the oil stains on both sides of the steel strip.

[0004] The scraper in a general scraper-type oil removal device is a straight blade with a fixed shape. Since the surface of the steel belt is not absolutely flat, it often has unevenness in some local positions, resulting in poor fit between the straight blade and the surface of the steel belt, resulting in poor oil scraping effect, resulting in more residual oil, and requiring frequent replacement of the cleaning fluid during subsequent cleaning.

[0005] Therefore, the prior art needs to be improved and enhanced. Summary of the invention

[0006] The purpose of the present application is to provide a steel strip surface oil removal device and a control method thereof, which can improve the fit between the scraper and the steel strip surface, thereby improving the oil scraping effect.

[0007] In a first aspect, the present application provides a steel strip surface degreasing device, comprising a control system, a machine platform, and a plurality of transmission roller groups and an oil scraping mechanism arranged on the top of the machine platform, and also comprising a speed sensor and a distance measuring mechanism arranged in front of the oil scraping mechanism; the speed sensor is used to measure the moving speed of the steel strip; the distance measuring mechanism is used to measure the height of the upper and lower surfaces of the steel strip at multiple positions in the left and right directions;

[0008] The oil scraping mechanism comprises an upper base plate and a lower base plate which are spaced apart from each other, and at least one oil scraping assembly is arranged on each of the upper base plate and the lower base plate, and the oil scraping assembly comprises an oil scraping knife composed of a plurality of scraping blades arranged in the left-right direction, each of the scraping blades can move up and down independently, and any two adjacent scraping blades are mutually offset in the front-to-back direction and partially abut against each other front-to-back, and the oil scraping assembly also comprises a driving device for driving each of the scraping blades to move up and down independently; the oil scraping knife on the upper base plate is used to scrape oil from the upper surface of the steel strip, and the oil scraping knife on the lower base plate is used to scrape oil from the lower surface of the steel strip;

[0009] The control system is electrically connected to the speed sensor, the distance measuring mechanism and the driving device, and is used to control the driving device to adjust the height of each scraper blade according to the measurement results of the speed sensor and the distance measuring mechanism, so that each scraper blade fits the surface of the steel belt.

[0010] A distance measuring mechanism is arranged in front of the scraping mechanism to measure the heights of the upper and lower surfaces of the steel belt at multiple positions in the left and right directions, and a plurality of scraping blades that can move up and down independently are used to replace the integral scraper, so that the height of each scraping blade can be adjusted according to the measurement result of the distance measuring mechanism, so that each scraping blade can better fit the surface of the steel belt, and even if the surface of the steel belt is uneven, a good oil scraping effect can be guaranteed.

[0011] Preferably, the scraper blade includes a blade body and a telescopic shaft, the driving device includes a first shell, a plurality of motors arranged on the first shell, and a plurality of cam transmission mechanisms arranged in the first shell, the telescopic shaft is slidably connected to the first shell and can slide axially relative to the first shell, and each of the motors is drivingly connected to each of the telescopic shafts through each of the cam transmission mechanisms.

[0012] Preferably, the cam transmission mechanism includes a cam, a sliding member and a first spring; the cam is connected to one of the motors and is driven to rotate by the corresponding motor; one of the upper and lower sides of the sliding member is against the circumferential surface of the cam, and the other side is fixedly connected to one of the telescopic shafts; the first spring is sleeved on the corresponding telescopic shaft, and its two ends are respectively against the sliding member and the first shell, and the first spring is used to press the sliding member against the cam.

[0013] The height of the scraper blade can be quickly adjusted through the motor and the cam transmission mechanism to better adapt to the change of the surface shape of the steel belt and improve the oil scraping effect.

[0014] Preferably, the sliding member includes an abutment portion extending in the up-down direction and an extension portion extending in the front-to-back direction, one end of the abutment portion away from the extension portion abuts against the circumferential surface of the corresponding cam, and the extension portion is fixedly connected to the corresponding telescopic shaft; in the same driving device, the abutment portions of any two adjacent sliding members are staggered in the front-to-back direction, and the corresponding two cams are correspondingly staggered in the front-to-back direction.

[0015] Thus, the distance between adjacent telescopic axes can be smaller, and the size of the blade in the left and right directions can also be smaller, so that it can better adapt to the small-size shape changes of the steel belt surface in the width direction, further improve the fit between the scraper blade and the steel belt surface, and further improve the oil scraping effect.

[0016] Preferably, in the same driving device, the motors corresponding to any two adjacent cams are respectively arranged on the front and rear sides of the first shell.

[0017] Preferably, in the scraper blade, the blade body is pivotally connected to the telescopic shaft, and the blade body can swing around an axis extending forward and backward.

[0018] Preferably, one oil scraping assembly is provided on both the front and rear sides of the upper base plate and the lower base plate.

[0019] Preferably, the oil scraping mechanism also includes a fixed frame, at least two guide columns extending up and down, at least two second springs, a slide and a first adjustment structure; the two ends of the guide column are respectively fixedly connected to the fixed frame and the lower base plate; the slide and the upper base plate are both slidably mounted on the guide column, and the slide is located between the upper base plate and the fixed frame; each of the second springs is respectively mounted on a different guide column and connected between the slide and the upper base plate, and the second spring is used to provide a downward pressure force to the upper base plate; the first adjustment structure is arranged on the fixed frame and is used to adjust the height of the slide.

[0020] In a second aspect, the present application provides a control method for the steel strip surface degreasing device as described above, which is applied to the control system of the steel strip surface degreasing device, comprising the steps of:

[0021] A1. Obtain the measurement results of the distance measuring mechanism and the moving speed of the steel strip measured by the speed sensor; the measurement results of the distance measuring mechanism include the heights of the upper and lower surfaces of the steel strip at multiple positions in the left and right directions;

[0022] A2. Calculate the delay time of each of the scrapers corresponding to the measurement result of the ranging mechanism according to the moving speed of the steel strip;

[0023] A3. Calculating the target height of each of the scrapers corresponding to the measurement results of the ranging mechanism according to the measurement results of the ranging mechanism;

[0024] A4. Control the driving device to delay adjusting each scraper to the corresponding target height according to the delay time.

[0025] Preferably, step A3 comprises:

[0026] A301. According to the height of the upper surface of the steel strip at multiple positions in the left-right direction, the lateral extension curve of the upper surface of the steel strip is fitted, and according to the height of the lower surface of the steel strip at multiple positions in the left-right direction, the lateral extension curve of the lower surface of the steel strip is fitted;

[0027] A302. According to the position of each of the scrapers of the lower substrate in the left-right direction, the corresponding lower surface height value is extracted from the lateral extension curve of the lower surface to calculate the target height of each of the scrapers of the lower substrate;

[0028] A303. According to the position of each scraper of the upper substrate in the left-right direction, the corresponding upper surface height value is extracted from the lateral extension curve of the upper surface to calculate the target height of each scraper of the upper substrate.

[0029] Beneficial effect: The steel belt surface oil removal device and control method provided by the present application are provided with a distance measuring mechanism in front of the scraping mechanism to measure the heights of the upper and lower surfaces of the steel belt at multiple positions in the left and right directions, and a plurality of scraping blades that can move up and down independently are used to replace the integral scraper, so that the height of each scraper blade can be adjusted according to the measurement result of the distance measuring mechanism, so that each scraper blade can better fit the steel belt surface, and even if the steel belt surface is uneven, it can ensure a good oil scraping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a steel strip surface oil removal device provided in an embodiment of the present application.

[0031] Figure 2 It is a structural schematic diagram of the oil scraping mechanism.

[0032] Figure 3 The figure is a schematic diagram of the structure of an oil scraper assembly.

[0033] Figure 4 for Figure 3 Diagram of the transmission connection structure between the scraper blade and the motor in the oil scraper assembly.

[0034] Figure 5 It is a schematic diagram of the structure of another oil scraper assembly.

[0035] Figure 6 It is a structural diagram of the distance measuring mechanism.

[0036] Figure 7 A flow chart of a control method provided in an embodiment of the present application.

[0037] Explanation of reference numerals: 1. machine platform; 2. transmission roller group; 201. active roller; 202. driven pressure roller; 3. scraper mechanism; 4. speed sensor; 5. distance measuring mechanism; 501. sensor mounting seat; 502. distance measuring sensor; 6. upper substrate; 7. lower substrate; 8. scraper assembly; 801. scraper blade; 8011. blade body; 8012. telescopic shaft; 802. driving device; 8021. second shell; 8022. telescopic airbag; 8023. return spring; 8024. first shell; 8025. motor; 8026. cam; 8027. sliding member; 8027a. abutment portion; 8027b. extension portion; 8028. first spring; 8029. protective cover; 9. fixing frame; 10. guide column; 11. second spring; 12. slide; 13. first adjustment structure. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] For the convenience of explanation, in this application, the width direction of the steel strip during operation is set as the left-right direction (i.e. Figure 1 The Y-axis direction in the figure), the moving direction of the steel belt during operation is set to the backward direction (i.e. Figure 1 The positive X-axis direction in the image), the forward direction is opposite to the backward direction (i.e. the forward direction is Figure 1 The negative X-axis direction in the middle), and the normal direction of the steel belt during operation is set to the up-down direction (i.e. Figure 1 in the Z-axis direction).

[0041] Please refer to Figure 1-Figure 6, is a steel strip surface degreasing device in some embodiments of the present application, comprising a control system, a machine platform 1, and a plurality of transmission roller groups 2 and an oil scraping mechanism 3 arranged on the top of the machine platform 1, and also comprising a speed sensor 4 and a distance measuring mechanism 5 arranged in front of the oil scraping mechanism 3; the speed sensor 4 is used to measure the moving speed of the steel strip; the distance measuring mechanism 5 is used to measure the height of the upper and lower surfaces of the steel strip at multiple positions in the left and right directions;

[0042] The oil scraping mechanism 3 includes an upper base plate 6 and a lower base plate 7 spaced apart from each other, and at least one oil scraping component 8 (such as Figure 2 As shown in the figure, the oil scraping assembly 8 includes an oil scraper blade composed of a plurality of scraping blades 801 arranged in the left-right direction, each scraping blade 801 can move up and down independently, and any two adjacent scraping blades 801 are mutually offset in the front-to-back direction and partially abut against each other (that is, the rear side surface of one of the two scraping blades 801 partially abuts against the front side surface of the other), and the oil scraping assembly 8 also includes a driving device 802 (as shown in the figure) for driving each scraping blade 801 to move up and down independently. Figure 3 The oil scraper on the upper substrate 6 (i.e., the oil scraper of the oil scraper assembly 8 disposed on the upper substrate 6) is used to scrape oil from the upper surface of the steel strip, and the oil scraper on the lower substrate 7 (i.e., the oil scraper of the oil scraper assembly 8 disposed on the lower substrate 7) is used to scrape oil from the lower surface of the steel strip;

[0043] The control system is electrically connected to the speed sensor 4, the distance measuring mechanism 5 and the driving device 802, and is used to control the driving device 802 to adjust the height of each scraper 801 according to the measurement results of the speed sensor 4 and the distance measuring mechanism 5, so that each scraper 801 fits the surface of the steel belt (for the specific control process, refer to the control method below).

[0044] A distance measuring mechanism 5 is arranged in front of the oil scraping mechanism 3 to measure the heights of the upper and lower surfaces of the steel belt at multiple positions in the left-right direction, and a plurality of scraping blades 801 that can move up and down independently are used to replace the integral scraper, so that the height of each scraper blade 801 can be adjusted according to the measurement result of the distance measuring mechanism 5, so that each scraper blade 801 can better fit the surface of the steel belt, and even if the surface of the steel belt is uneven, a good oil scraping effect can be guaranteed.

[0045] When working, the oil scraped by the scraper 801 will flow to the left and right sides. By partially offsetting the adjacent scraper blades 801 front and back, the gaps between the adjacent scraper blades 801 are eliminated without hindering the independent up and down movement of each scraper blade 801, so that the oil cannot flow out from the gaps between the adjacent scraper blades 801 and remain on the steel belt. Finally, the scraped oil will flow along the left and right directions to the two ends of the scraper knife and leave the steel belt.

[0046] Specifically, see Figure 3-Figure 5The scraper blade 801 includes a blade body 8011 and a telescopic shaft 8012 .

[0047] In some embodiments, see Figure 5 The driving device 802 is a pneumatic device, which includes a second shell 8021, a plurality of telescopic airbags 8022 arranged in the second shell 8021, and a plurality of return springs 8023 arranged in the second shell 8021. The telescopic shaft 8012 of each scraper 801 is slidably connected to the second shell 8021 and is respectively fixedly connected to the first end of each telescopic airbag 8022. The telescopic shaft 8012 can slide axially relative to the second shell 8021. The second end of each telescopic airbag 8022 is fixedly connected to the second shell 8021 and is connected to the external air supply system through an electromagnetic three-way valve (the electromagnetic three-way valve is electrically connected to the control system, and the three connecting ports of the electromagnetic three-way valve are respectively connected to the telescopic airbag 8022, the external air supply system and the atmosphere). A return spring 8023 is sleeved on the telescopic shaft 8012 of each scraper 801, and the two ends of the return spring 8023 are respectively against the second shell 8021 and the first end of the telescopic airbag 8022. The return spring 8023 is a compression spring.

[0048] During operation, when the scraper 801 needs to be extended, the control system controls the electromagnetic three-way valve to connect the external air supply system and the corresponding telescopic airbag 8022, thereby supplying air to the corresponding telescopic airbag 8022 to extend the corresponding telescopic airbag 8022; when the scraper 801 needs to be retracted, the control system controls the electromagnetic three-way valve to connect the atmosphere and the corresponding telescopic airbag 8022, thereby exhausting and shortening the telescopic airbag 8022 under the action of the return spring 8023. The pneumatic device is used as the driving device 802, which has a simple and compact structure, is not afraid of oil pollution (even if the oil enters the second shell 8021 and falls into the telescopic airbag 8022, it will not affect the operation of the telescopic airbag 8022), and has strong environmental adaptability.

[0049] In other embodiments, see Figure 3 , Figure 4 The driving device 802 includes a first shell 8024, a plurality of motors 8025 arranged on the first shell 8024, and a plurality of cam transmission mechanisms arranged in the first shell 8024. The telescopic shaft 8012 is slidably connected to the first shell 8024 and can slide axially relative to the first shell 8024. Each motor 8025 is driven and connected to each telescopic shaft 8012 through each cam transmission mechanism.

[0050] Specifically, see Figure 4The cam transmission mechanism includes a cam 8026, a sliding member 8027 and a first spring 8028; the cam 8026 is connected to a motor 8025 and is driven to rotate by the corresponding motor 8025; one of the upper and lower sides of the sliding member 8027 is against the circumferential surface of the cam 8026, and the other side is fixedly connected to a telescopic shaft 8012; the first spring 8028 is sleeved on the corresponding telescopic shaft 8012, and its two ends are respectively against the sliding member 8027 and the first shell 8024, and the first spring 8028 is used to press the sliding member 8027 against the cam 8026.

[0051] During operation, the rotation angle of the cam 8026 is controlled by the motor 8025, so that the telescopic shaft 8012 is pushed to a corresponding height by the cam 8026. The height of the scraper 801 can be quickly adjusted by the motor 8025 and the cam transmission mechanism, so that when the steel belt moves at a high speed, the height of the scraper 801 can be adjusted in time to better adapt to the change of the steel belt surface shape and improve the oil scraping effect.

[0052] Preferably, see Figure 4 The sliding member 8027 includes a contact portion 8027a extending in the up-down direction and an extension portion 8027b extending in the front-to-back direction. One end of the contact portion 8027a away from the extension portion 8027b contacts the circumferential surface of the corresponding cam 8026, and the extension portion 8027b is fixedly connected to the corresponding telescopic shaft 8012. In the same driving device 802, the contact portions 8027a of any two adjacent sliding members 8027 are misaligned in the front-to-back direction, and the corresponding two cams 8026 are correspondingly misaligned in the front-to-back direction.

[0053] Thus, the distance between adjacent telescopic shafts 8012 can be smaller, and the size of the sheet 8011 in the left-right direction can also be smaller, so as to better adapt to the small-size shape changes of the steel strip surface in the width direction (the smaller the size of the sheet 8011 in the left-right direction, the closer the curve formed by the blades of each sheet 8011 is to the lateral curve of the steel strip surface, and thus the closer the scraper knife fits to the steel strip surface), further improving the fit between the scraper blade 801 and the steel strip surface, and further improving the oil scraping effect.

[0054] Further, see Figure 3 , Figure 4 In the same driving device 802, the motors 8025 corresponding to any two adjacent cams 8026 are respectively arranged on the front and rear sides of the first housing 8024. Therefore, the distance between adjacent telescopic shafts 8012 is less restricted by the size of the motor 8025, and the distance between adjacent telescopic shafts 8012 can be further reduced, thereby further reducing the size of the blade 8011 in the left and right direction, and further improving the fit between the scraper 801 and the surface of the steel belt.

[0055] Further, see Figure 4 In order to prevent oil from flowing into the motor 8025 and affecting the normal operation of the motor 8025, protective covers 8029 can be provided on the front and rear sides of the first housing 8024. The motors 8025 on the front and rear sides of the first housing 8024 are respectively located in the corresponding protective covers 8029. The protective covers 8029 are used to prevent oil from flowing into the motor 8025. Preferably, the side of the protective cover 8029 facing away from the steel belt can be an open structure, which does not affect the blocking effect of oil on the one hand, and facilitates the heat dissipation of the motor 8025 on the other hand.

[0056] In the scraper 801, the blade body 8011 and the telescopic shaft 8012 can be fixedly connected; but more preferably, Figure 4 , Figure 5 In the scraper 801, the sheet 8011 is pivotally connected to the telescopic shaft 8012, and the sheet 8011 can swing around an axis extending forward and backward. Therefore, the sheet 8011 can automatically swing to a corresponding angle according to the slope of the steel belt surface in the left and right directions, so that the sheet 8011 can better fit the steel belt surface and further improve the oil scraping effect.

[0057] The number of oil scraping assemblies 8 and their locations on the upper base plate 6 and the lower base plate 7 can be set according to actual needs. Figure 2 In the embodiment, an oil scraping assembly 8 is provided on both the front and rear sides of the upper base plate 6 and the lower base plate 7.

[0058] Among them, for the use of Figure 3 In the case of the oil scraper assembly 8 shown, avoidance grooves a are provided on both the front and rear sides of the upper base plate 6 and the lower base plate 7, and the avoidance grooves a are used to provide a holding space for the motor 8025 (and the protective cover 8029).

[0059] The two ends of the second shell 8021 or the first shell 8024 can be connected to the upper base plate 6 or the lower base plate 7 by screws to facilitate assembly, disassembly and maintenance.

[0060] Among them, the upper substrate 6 and the lower substrate 7 can be fixed; but more preferably, the distance between the upper substrate 6 and the lower substrate 7 is adjustable, so that the distance between the upper substrate 6 and the lower substrate 7 can be adjusted according to the actual thickness of the steel strip to improve applicability.

[0061] In some embodiments, see Figure 2The oil scraping mechanism 3 also includes a fixed frame 9, at least two guide columns 10 extending up and down, at least two second springs 11, a slide 12 and a first adjustment structure 13; the two ends of the guide column 10 are respectively fixedly connected to the fixed frame 9 and the lower base plate 7; the slide 12 and the upper base plate 6 are both slidably mounted on the guide column 10, and the slide 12 is located between the upper base plate 6 and the fixed frame 9; each second spring 11 is respectively mounted on a different guide column 10 and connected between the slide 12 and the upper base plate 6, and the second spring 11 is used to provide a downward pressure force to the upper base plate 6; the first adjustment structure 13 is arranged on the fixed frame 9 and is used to adjust the height of the slide 12.

[0062] By adjusting the height of the slide 12, the distance between the upper base plate 6 and the lower base plate 7 can be adjusted. During operation, under the action of the second spring 11, each scraper 801 can be reliably pressed onto the surface of the steel belt, and can float up and down with the thickness of the steel belt under the elastic force of the second spring 11. On the one hand, the scraper 801 can be in reliable contact with the surface of the steel belt to ensure the oil scraping effect, and on the other hand, it can avoid excessive scraping force between the scraper 801 and the surface of the steel belt and damage the steel belt.

[0063] The first adjustment structure 13 includes an adjustment screw, the lower end of which is rotatably connected to the slide 12 , and the screw is threadedly connected to the fixing frame 9 .

[0064] Specifically, see Figure 6 The distance measuring mechanism 5 includes two sensor mounting seats 501 spaced apart from each other, a space for the steel belt to pass through is formed between the two sensor mounting seats 501, and a plurality of distance measuring sensors 502 spaced apart from each other along the left-right direction are arranged on the two sensor mounting seats 501. The distance measuring sensor 502 of the upper sensor mounting seat 501 is used to measure the height of the upper surface of the steel belt, and the distance measuring sensor 502 of the lower sensor mounting seat 501 is used to measure the height of the lower surface of the steel belt.

[0065] Each transmission roller group 2 includes an active roller 201 driven by a driving motor and a driven pressure roller 202 arranged above the active roller 201. Preferably, the upper and lower positions of the driven pressure roller 202 are adjustable to be suitable for steel strips of different thicknesses.

[0066] The number of the transmission roller groups 2 can be set according to actual needs. Preferably, at least one transmission roller group 2 is respectively arranged at the front and rear of the oil scraping mechanism 3 .

[0067] In some preferred embodiments, two transmission roller groups 2 are arranged in front of the oil scraping mechanism 3, and the distance measuring mechanism 5 is arranged between the two transmission roller groups 2 in front of the oil scraping mechanism 3. Due to the clamping effect of the two transmission roller groups 2, the steel belt between the two transmission roller groups 2 shakes less, which can improve the accuracy of the measurement result of the distance measuring mechanism 5.

[0068] The speed sensor 4 may be a rotary encoder, which is connected to the active roller 201 of one of the transmission roller groups 2. Figure 1 shown.

[0069] refer to Figure 7 The present application provides a control method for a steel strip surface degreasing device as described above, which is applied to a control system of the steel strip surface degreasing device, and comprises the following steps:

[0070] A1. Obtain the measurement results of the distance measuring mechanism 5 and the moving speed of the steel strip measured by the speed sensor 4; the measurement results of the distance measuring mechanism 5 include the height of the upper and lower surfaces of the steel strip at multiple positions in the left and right directions;

[0071] A2. Calculate the delay time of each scraper 801 corresponding to the measurement result of the ranging mechanism 5 according to the moving speed of the steel strip;

[0072] A3. Calculate the target height of each scraper 801 corresponding to the measurement result of the ranging mechanism 5 according to the measurement result of the ranging mechanism 5;

[0073] A4. Control the driving device 802 to adjust each scraper 801 to the corresponding target height according to the delay time.

[0074] Among them, since the position measured by the distance measuring mechanism 5 needs a certain amount of time to move to the position of the scraper 801, it is necessary to delay the adjustment of the scraper 801 to the corresponding target height. According to the different distances between the distance measuring mechanism 5 and each scraper 801 in the front and rear directions, the delay time corresponding to each scraper 801 will be different.

[0075] The distance L between each scraper 801 and the distance measuring mechanism 5 in the front-to-back direction can be pre-calibrated, and the delay time corresponding to each scraper 801 can be obtained by dividing the distance L corresponding to each scraper 801 by the moving speed of the steel belt.

[0076] Wherein, step A3 comprises:

[0077] A301. According to the height of the upper surface of the steel strip at multiple positions in the left-right direction, the lateral extension curve of the upper surface of the steel strip is fitted, and according to the height of the lower surface of the steel strip at multiple positions in the left-right direction, the lateral extension curve of the lower surface of the steel strip is fitted;

[0078] A302. According to the position of each scraper blade 801 of the lower substrate 7 in the left and right direction, the corresponding lower surface height value is extracted from the lower surface lateral extension curve to calculate the target height of each scraper blade 801 of the lower substrate 7;

[0079] A303. According to the position of each scraper 801 of the upper substrate 6 in the left-right direction, the corresponding upper surface height value is extracted from the upper surface lateral extension curve to calculate the target height of each scraper 801 of the upper substrate 6.

[0080] In step A301, the positions of each measuring point on the upper surface and the lower surface of the steel strip in the left-right direction (i.e., the Y coordinate) are known (can be calibrated in advance). According to the heights of the upper surface of the steel strip at multiple positions in the left-right direction and the positions of each measuring point on the upper surface of the steel strip in the left-right direction, a curve of the change of the upper surface height with respect to the position in the left-right direction (i.e., the curve of the change of the Z coordinate with respect to the Y coordinate), i.e., the lateral extension curve of the upper surface, can be fitted. Similarly, the lateral extension curve of the lower surface can be obtained.

[0081] In step A302, the lower surface height value is the height value (i.e., the Z coordinate) corresponding to the point on the lower surface transverse extension curve. The height value of the point corresponding to the position (pre-calibrated) of the midpoint of the blade portion (i.e., the edge in contact with the steel strip) of the scraper 801 of the lower substrate 7 in the left-right direction can be extracted from the lower surface transverse extension curve as the lower surface height value corresponding to the scraper 801 (for example, the position of the midpoint of the blade portion of one of the scrapers 801 of the lower substrate 7 in the left-right direction is Y1, then the height value corresponding to the point with the horizontal coordinate Y1 is extracted from the lower surface transverse extension curve. , as the lower surface height value corresponding to the scraper 801); the average height value of each point corresponding to the extension range (pre-calibrated) of the scraper 801 of the lower substrate 7 in the left-right direction can also be extracted on the lower surface lateral extension curve as the lower surface height value corresponding to the scraper 801 (for example, the left and right sides of one of the scrapers 801 of the lower substrate 7 are located at Y2 and Y3 in the left-right direction respectively, then the average value of the height values ​​of the points with horizontal coordinates from Y2 to Y3 on the lower surface lateral extension curve is extracted as the lower surface height value corresponding to the scraper 801).

[0082] In this embodiment, since the lower substrate 7 is fixed, in order to ensure that the scraper blade 801 of the lower substrate 7 can reliably fit with the lower surface of the steel belt, it is necessary to ensure that when the measured position moves to the position corresponding to the scraper blade 801, the height of the blade 801 is equal to the corresponding lower surface height value. Therefore, the target height of the scraper blade 801 of the lower substrate 7 refers to the absolute height that the blade 801 of the lower substrate 7 needs to reach; therefore, in step A302, the target height of each scraper blade 801 of the lower substrate 7 is equal to the lower surface height value corresponding to each scraper blade 801 of the lower substrate 7.

[0083] In step A303, the upper surface height value, that is, the height value corresponding to the point on the upper surface lateral extension curve (that is, the Z coordinate), can be extracted from the upper surface lateral extension curve to obtain the height value of the point corresponding to the position of the midpoint of the blade portion of the scraper 801 of the upper substrate 6 in the left-right direction as the upper surface height value corresponding to the scraper 801 (for example, the position of the midpoint of the blade portion of one of the scrapers 801 of the upper substrate 6 in the left-right direction is Y4, then the height value corresponding to the point with the horizontal coordinate Y4 is extracted from the upper surface lateral extension curve as the upper surface height value corresponding to the scraper 801); the average height value of each point corresponding to the extension range of the scraper 801 of the upper substrate 6 in the left-right direction can also be extracted from the upper surface lateral extension curve to obtain the upper surface height value corresponding to the scraper 801 (for example, the positions of the left and right sides of one of the scrapers 801 of the upper substrate 6 in the left-right direction are Y5 and Y6 respectively, then the average height value of the points with horizontal coordinates from Y5 to Y6 is extracted from the upper surface lateral extension curve as the upper surface height value corresponding to the scraper 801).

[0084] If the upper substrate 6 is fixed, in order to ensure that the scraper blade 801 of the upper substrate 6 can reliably fit with the upper surface of the steel strip, it is necessary to ensure that when the measured position moves to the position corresponding to the scraper blade 801, the height of the blade 801 is equal to the corresponding upper surface height value. At this time, the target height of the scraper blade 801 of the upper substrate 6 refers to the absolute height that the blade 801 of the upper substrate 6 needs to reach; therefore, in step A303, the target height of each scraper blade 801 of the upper substrate 6 is equal to the upper surface height value corresponding to each scraper blade 801 of the upper substrate 6.

[0085] If the upper substrate 6 can float up and down under the action of the second spring 11, the elastic force of the second spring 11 can drive the scraper 801 of the upper substrate 6 to press against the upper surface of the steel strip. In order to ensure that the scrapers 801 of the upper substrate 6 can reliably fit the upper surface of the steel strip, it is only necessary to make the relative heights between the scrapers 801 of the upper substrate 6 consistent with the relative heights between the corresponding position points on the lateral extension curve of the upper surface. At this time, the target height of the scraper 801 of the upper substrate 6 refers to the relative height that the blade of the scraper 801 of the upper substrate 6 needs to reach. One of the scrapers 801 of each scraper on the upper substrate 6 can be pre-designated as the reference scraper 801 of the corresponding scraper. The relative height refers to the height of the blade of the scraper 801 of the upper substrate 6 relative to the blade of the corresponding reference scraper 801. Therefore, in step A303, the upper surface height value of each scraper 801 of the upper substrate 6 is subtracted from the upper surface height value of the blade of the corresponding reference scraper 801 to obtain the target height of each scraper 801 of the upper substrate 6.

[0086] Specifically, in step A4, for each scraper 801 of the lower substrate 7, after a corresponding delay time from the moment when the measurement result of the distance measuring mechanism 5 is obtained, the absolute height of the corresponding scraper 801 is adjusted to the corresponding target height.

[0087] If the upper substrate 6 is fixed, in step A4, for each scraper 801 of the upper substrate 6, after a corresponding delay time from the moment when the measurement result of the distance measuring mechanism 5 is obtained, the absolute height of the corresponding scraper 801 is adjusted to the corresponding target height.

[0088] If the upper substrate 6 can float up and down under the action of the second spring 11, in step A4, for each scraper 801 of the upper substrate 6, from the moment when the measurement result of the distance measuring mechanism 5 is obtained, after a corresponding delay time, the height of the reference scraper 801 is kept unchanged, and the heights of other scrapers 801 are adjusted so that the relative heights of other scrapers 801 relative to the corresponding reference scraper 801 are the corresponding target heights.

[0089] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0090] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel strip surface degreasing device, comprising a control system, a machine platform (1), and a plurality of transmission roller groups (2) and an oil scraping mechanism (3) arranged on the top of the machine platform (1), characterized in that: It also includes a speed sensor (4) and a distance measuring mechanism (5) arranged in front of the oil scraping mechanism (3); the speed sensor (4) is used to measure the moving speed of the steel strip; the distance measuring mechanism (5) is used to measure the height of the upper and lower surfaces of the steel strip at multiple positions in the left and right directions; The oil scraping mechanism (3) comprises an upper base plate (6) and a lower base plate (7) which are arranged in an upper and lower spaced relationship. At least one oil scraping assembly (8) is arranged on each of the upper base plate (6) and the lower base plate (7). The oil scraping assembly (8) comprises an oil scraping knife composed of a plurality of scraping blades (801) arranged in the left-right direction. Each of the scraping blades (801) can independently move up and down. Any two adjacent scraping blades (801) are mutually offset in the front-to-back direction and partially abut against each other in the front-to-back direction. The oil scraping assembly (8) further comprises a driving device (802) for driving each of the scraping blades (801) to independently move up and down. The oil scraping knife on the upper base plate (6) is used to scrape oil from the upper surface of the steel strip, and the oil scraping knife on the lower base plate (7) is used to scrape oil from the lower surface of the steel strip. The control system is electrically connected to the speed sensor (4), the distance measuring mechanism (5) and the driving device (802), and is used to control the driving device (802) to adjust the height of each scraper (801) according to the measurement results of the speed sensor (4) and the distance measuring mechanism (5), so that each scraper (801) is in contact with the surface of the steel strip; The scraper blade (801) comprises a blade body (8011) and a telescopic shaft (8012); the driving device (802) comprises a first housing (8024), a plurality of motors (8025) arranged on the first housing (8024), and a plurality of cam transmission mechanisms arranged in the first housing (8024); the telescopic shaft (8012) is slidably connected to the first housing (8024) and is capable of sliding axially relative to the first housing (8024); and each of the motors (8025) is drivingly connected to each of the telescopic shafts (8012) via each of the cam transmission mechanisms; The cam transmission mechanism comprises a cam (8026), a sliding member (8027) and a first spring (8028); the cam (8026) is connected to one of the motors (8025) and driven to rotate by the corresponding motor (8025); one of the upper and lower sides of the sliding member (8027) is against the circumferential surface of the cam (8026), and the other side is fixedly connected to one of the telescopic shafts (8012); the first spring (8028) is sleeved on the corresponding telescopic shaft (8012), and the two ends thereof are respectively against the sliding member (8027) and the first housing (8024); the first spring (8028) is used to press the sliding member (8027) against the cam (8026).

2. The steel strip surface degreasing device according to claim 1, characterized in that: The sliding member (8027) comprises an abutment portion (8027a) extending in the up-down direction and an extension portion (8027b) extending in the front-to-back direction, wherein one end of the abutment portion (8027a) away from the extension portion (8027b) abuts against the circumferential surface of the corresponding cam (8026), and the extension portion (8027b) is fixedly connected to the corresponding telescopic shaft (8012); in the same driving device (802), the abutment portions (8027a) of any two adjacent sliding members (8027) are offset in the front-to-back direction, and the corresponding two cams (8026) are correspondingly offset in the front-to-back direction.

3. The steel strip surface degreasing device according to claim 2, characterized in that: In the same driving device (802), the motors (8025) corresponding to any two adjacent cams (8026) are respectively arranged on the front and rear sides of the first housing (8024).

4. The steel strip surface degreasing device according to claim 1, characterized in that: In the scraper blade (801), the blade body (8011) and the telescopic shaft (8012) are pivotally connected, and the blade body (8011) is capable of swinging around an axis extending forward and backward.

5. The steel strip surface degreasing device according to claim 1, characterized in that: An oil scraping assembly (8) is provided on both the front and rear sides of the upper base plate (6) and the lower base plate (7).

6. The steel strip surface degreasing device according to any one of claims 1 to 5, characterized in that: The oil scraping mechanism (3) further comprises a fixed frame (9), at least two guide columns (10) extending up and down, at least two second springs (11), a slide frame (12) and a first adjustment structure (13); the two ends of the guide column (10) are respectively fixedly connected to the fixed frame (9) and the lower base plate (7); the slide frame (12) and the upper base plate (6) are both slidably mounted on the guide column (10), and the slide frame (12) is located between the upper base plate (6) and the fixed frame (9); each of the second springs (11) is respectively mounted on a different guide column (10) and connected between the slide frame (12) and the upper base plate (6), and the second spring (11) is used to provide a downward pressure elastic force to the upper base plate (6); the first adjustment structure (13) is arranged on the fixed frame (9) and is used to adjust the height of the slide frame (12).

7. A control method for a steel strip surface degreasing device according to any one of claims 1 to 6, applied to the control system of the steel strip surface degreasing device, characterized in that: Includes steps: A1. Obtaining the measurement result of the distance measuring mechanism (5) and the moving speed of the steel strip measured by the speed measuring sensor (4); the measurement result of the distance measuring mechanism (5) includes the heights of the upper and lower surfaces of the steel strip at multiple positions in the left and right directions; A2. Calculating the delay time of each scraper (801) corresponding to the measurement result of the distance measuring mechanism (5) according to the moving speed of the steel strip; A3. Calculating the target height of each scraper (801) corresponding to the measurement result of the distance measuring mechanism (5) according to the measurement result of the distance measuring mechanism (5); A4. According to the delay time, the driving device (802) is controlled to delay adjusting each scraper (801) to the corresponding target height.

8. The control method according to claim 7, characterized in that: Step A3 includes: A301. According to the height of the upper surface of the steel strip at multiple positions in the left-right direction, the lateral extension curve of the upper surface of the steel strip is fitted, and according to the height of the lower surface of the steel strip at multiple positions in the left-right direction, the lateral extension curve of the lower surface of the steel strip is fitted; A302. According to the position of each scraper (801) of the lower substrate (7) in the left-right direction, extract the corresponding lower surface height value from the lateral extension curve of the lower surface to calculate the target height of each scraper (801) of the lower substrate (7); A303. According to the position of each scraper (801) of the upper substrate (6) in the left-right direction, the corresponding upper surface height value is extracted from the lateral extension curve of the upper surface to calculate the target height of each scraper (801) of the upper substrate (6).

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