Intelligent automatic emulsion purging device and method for cold continuous rolling mill

Abstract

The invention provides an automatic emulsion blowing device and method for an intelligent cold continuous rolling mill, and relates to the technical field of cold-rolled strip rolling, the device comprises an upper surface air blowing air beam assembly, a lower surface air blowing air beam assembly and a plurality of air supply hoses, the two ends of each air blowing air beam assembly are connected with a rotating shaft, the rotating shaft on one side is rotationally connected to a rolling mill rack, and the air supply hoses on the other side are rotationally connected to the rolling mill rack; the rotating shaft on the other side is connected with a servo motor; each blowing air beam assembly comprises multiple sections of blowing air beams, every two adjacent sections of blowing air beams are connected through a partition plate, each section of blowing air beam is connected with an air supply hose, and the multiple air supply hoses are connected with external air supply equipment; a plurality of air blowing nozzles are arranged on each section of air blowing beam, the air blowing nozzles are communicated with the corresponding air supply hoses through the air blowing beams, and electromagnetic valves are connected to the air blowing nozzles. According to the device, the consumption cost of compressed air can be reduced to the greatest extent while the emulsified liquid purging efficiency is improved, meanwhile, the residual unqualified product rate of the emulsified liquid is reduced, and the quality is improved.

Description

Technical Field

[0001] This invention relates to the field of cold-rolled strip rolling technology, and more particularly to an intelligent automatic emulsion blowing device and method for cold continuous rolling mills. Background Technology

[0002] In cold rolling mills, emulsions must be used as cooling and lubricating media during the rolling process. The emulsion is sprayed between the stands of the mill via a spray system, evenly distributing it between the strip and the rolls to form a thin film. At the mill exit, an emulsion purging system must be installed to blow compressed air across the upper and lower surfaces of the strip before it leaves the mill, removing excess emulsion and preventing defects such as post-rolling corrosion caused by emulsion residue.

[0003] Due to the limited location of the rolling mill stand exit, current common emulsion purging systems are typically arranged in single-unit configurations on both the upper and lower surfaces. This involves placing a compressed air pipe covering the entire strip width on each surface, with nozzles spaced at fixed intervals in the opposite direction of strip movement. During rolling, compressed air is introduced into the pipes, and the nozzles blow the emulsion away from the strip surface. While this arrangement is simple and easy to implement, the fixed nozzle angles, inability to control the nozzles in sections, and inability to dynamically adjust the airflow with the rolling speed make it difficult to adapt to the complex and varied specifications and speed changes of the rolling mill. This results in poor emulsion purging performance and a persistently high rate of defective products with residual emulsion.

[0004] Patent document CN112692081B discloses a special blowing structure for rolling mills, including a bottom plate, a fixed plate, and a top plate. The outer walls of the bottom plate and the top plate on opposite sides are connected by the fixed plate, and a support plate is fixed to one side of the outer wall of the top plate by bolts. A motor is fixed to the bottom outer wall of the support plate by bolts. The output end of the motor is connected to a swing blowing mechanism by threads. A screw is fixed to the outer wall of the bottom plate near the motor by a bearing. Pulleys are respectively sleeved on the screw and the output end of the motor, and the same transmission belt is sleeved on the outer circumference of the two pulleys. Guide rods are respectively connected to the outer walls of the bottom plate near the screw by threaded fixing rings, and the ends of the two guide rods and the screw are respectively sleeved on the same limiting plate. This patent only describes the components and functions related to improving the purging effect of emulsion residue, but it does not include content on how to adaptively and dynamically adjust the function according to different emulsion residue conditions under different width specifications and rolling speed conditions, nor does it provide a solution for the automatic adjustment of the blowing system during the conversion of rolling specifications and rolling speed. Therefore, it cannot solve the problem of emulsion residue on the surface of cold-rolled strip steel in the transition adjustment section.

[0005] Patent document CN221231298U discloses a cold rolling mill cleaning device, including a fixed frame, a servo motor fixedly installed on the right end of the fixed frame, and a rolled piece disposed below the fixed frame. The mounting brackets are located on the left and right sides below the fixed frame, and are offset below the fixed frame. The mounting brackets form a telescopic structure at the lower end of the fixed frame via a movable plate, movable rod, and movable column. An adjustment mechanism is located in the middle of the mounting bracket, and the adjustment mechanism drives the air delivery pipe and air nozzle to form a flipping structure inside the mounting bracket via a connecting column. This cold rolling mill cleaning device can achieve double-sided cleaning of the rolled piece. The sliding between the movable plate and the fixed frame causes the mounting bracket to extend and retract on the outside of the rolled piece, allowing the air nozzle to move and thoroughly clean the outer surface of the rolled piece, resulting in a relatively ideal overall cleaning effect. This patent only describes the structure and function of the purging device, but does not include any content on how to dynamically and automatically adjust the key parameters of the purging system according to the actual material width and speed produced by the rolling mill. It also does not provide a solution for the problem of emulsion residue on the surface of products rolled at different specifications and speeds. Therefore, it cannot solve the problem of automatically and efficiently eliminating emulsion residue in cold continuous rolling mills.

[0006] Therefore, it is necessary to provide a new type of automatic emulsion purging device to overcome the shortcomings of the existing technology. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides an intelligent automatic emulsion purging device and method for cold continuous rolling mills. Based on the existing equipment and processes at the exit section of cold continuous rolling mills, this invention comprehensively analyzes the surrounding equipment space and environment at the exit section. It calculates the required emulsion purging airflow intensity for rolling processes of different specifications and speeds, and utilizes fluid mechanics concepts to calculate the blowing angle. Combined with research on segmented blowing control schemes during plate width variations, the invention achieves real-time dynamic automatic adjustment of the most critical process parameters of the blowing device, such as airflow, angle, and number of nozzles, based on information such as strip width and rolling speed in the main line's secondary system. This improves emulsion purging efficiency while minimizing compressed air consumption costs and reducing the rate of residual defective products in the emulsion, thus improving overall quality.

[0008] The technical means employed in this invention are as follows: An intelligent automatic emulsion blowing device for a cold continuous rolling mill includes: an upper surface blowing beam assembly, a lower surface blowing beam assembly, and multiple air supply hoses. The upper and lower surface blowing beam assemblies are arranged vertically between the roll exit and tension roll in the mill exit section, respectively, and are used to blow the upper and lower surfaces of the strip. Each blowing beam assembly has two ends connected to a rotating shaft. One side of the rotating shaft is rotatably connected to the mill stand, and the other side of the rotating shaft is rotatably connected to the mill stand and connected to a servo motor. The servo motor is mounted on the mill stand. The upper and lower surface air-blowing beam assemblies have the same structure, each including multiple air-blowing beams. Adjacent air-blowing beams are fixedly connected by partitions. Each air-blowing beam is connected to a corresponding air supply hose. All air supply hoses are connected to external air supply equipment for supplying compressed air into the air-blowing beams. Each air-blowing beam is equipped with multiple air nozzles, which are connected to the corresponding air supply hoses through the air-blowing beams. Solenoid valves are connected to the air nozzles.

[0009] Furthermore, each blower beam assembly has three sections: a first blower beam located in the middle, and a second and a third blower beam located on either side of the first blower beam.

[0010] Furthermore, the first air blowing beam is provided with 5 to 8 air blowing nozzles, and the second and third air blowing beams are each provided with 4 to 5 air blowing nozzles, wherein the air blowing nozzles are flat-mouthed nozzles.

[0011] Furthermore, the multiple air nozzles on each air blower beam assembly are arranged on the same plane.

[0012] Furthermore, the rotating shaft rotates within ±90°.

[0013] The present invention also provides an intelligent automatic emulsion purging method for cold continuous rolling mills, which uses the above-mentioned intelligent automatic emulsion purging device for cold continuous rolling mills and includes the following steps: S1. Measure the height and width of the space between the roll exit and the tension roll in the mill exit section, and determine the dimensions of each component of the purging device based on the spatial location of the surrounding equipment and facilities in this area. S2. Each blower beam assembly is divided into segments and isolated. The number of blower nozzles on each segment of the blower beam is arranged, and the opening and closing of the blower nozzles is controlled by a solenoid valve. S3. Fix both ends of each blower beam assembly to a rotating shaft driven by a servo motor. The rotating shaft drives the blower beam assembly to rotate, thereby changing the angle between the blower nozzle and the strip steel. S4. During the rolling process, the blowing volume, blowing angle, and number of open blowing nozzles of the blowing device are automatically adjusted in real time according to the strip width and strip rolling speed to achieve the purging of the emulsion: S41. The angle of the blowing beam assembly is correlated with the strip rolling speed to adjust the blowing angle according to different real-time strip rolling speeds during the rolling process. S42. Link the number of blower nozzles to the strip width specification for control. Based on the width range of the online steel coil, control the opening and closing of the solenoid valves on the blower nozzles at different sections and positions. S43. The flow rate of compressed air in the blower beam is linked to the strip rolling speed for control. The flow rate of compressed air is controlled according to the online rolling speed of the steel coil.

[0014] Furthermore, in S41, when the strip rolling speed is 200≤v<500m / min, the blowing angle of the upper surface blowing beam assembly is -50~-40°, and the blowing angle of the lower surface blowing beam assembly is 40°~50°. When the strip rolling speed is 500≤v<800m / min, the blowing angle of the upper surface blowing beam assembly is -40°~-30°, and the blowing angle of the lower surface blowing beam assembly is 35°~45°. When the strip rolling speed is 800≤v<1100m / min, the blowing angle of the upper surface blowing beam assembly is -34°~-26°, and the blowing angle of the lower surface blowing beam assembly is 31°~39°. When the strip rolling speed is 1100≤v<1500m / min, the blowing angle of the upper surface blowing beam assembly is -24°~-16°, and the blowing angle of the lower surface blowing beam assembly is 21°~29°.

[0015] Furthermore, in S42, when the strip width is 800≤w<1000mm, 5 to 8 air nozzles are opened on the first air beam of the upper surface air beam assembly and the lower surface air beam assembly, and 0 to 1 air nozzle is opened on the second and third air beams of the upper surface air beam assembly and the lower surface air beam assembly. When the strip width is 1000≤w<1200mm, 5~8 air nozzles are opened on the first air beam of the upper surface air beam assembly and the lower surface air beam assembly, 1~2 air nozzles are opened on the second air beam of the upper surface air beam assembly and the lower surface air beam assembly, and 1~2 air nozzles are opened on the third air beam of the upper surface air beam assembly and the lower surface air beam assembly. When the strip width is 1200≤w<1350mm, 5~8 air nozzles are opened on the first air beam of the upper surface air beam assembly and the lower surface air beam assembly, 2~3 air nozzles are opened on the second air beam of the upper surface air beam assembly and the lower surface air beam assembly, and 2~3 air nozzles are opened on the third air beam of the upper surface air beam assembly and the lower surface air beam assembly. When the strip width is 1350≤w<1500mm, 5~8 air nozzles are opened on the first air beam of the upper surface air beam assembly and the lower surface air beam assembly, 3~4 air nozzles are opened on the second air beam of the upper surface air beam assembly and the lower surface air beam assembly, and 3~4 air nozzles are opened on the third air beam of the upper surface air beam assembly and the lower surface air beam assembly. When the strip width is 1500≤w<1700mm, 5~8 air nozzles are opened on the first air beam of the upper surface air beam assembly and the lower surface air beam assembly, 4~5 air nozzles are opened on the second air beam of the upper surface air beam assembly and the lower surface air beam assembly, and 4~5 air nozzles are opened on the third air beam of the upper surface air beam assembly and the lower surface air beam assembly.

[0016] Furthermore, in S43, when the strip rolling speed is 200≤v<500m / min, the compressed air flow rate in the first blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 10m³ / min. 3 / h~14m 3 / h, the compressed air flow rate in the second blowing beam of the upper and lower surface blowing beam assemblies is 4m³ / h. 3 / h~8m 3 / h, the compressed air flow rate in the third blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 4m³ / h. 3 / h~8m 3 / h; When the strip rolling speed is 500≤v<800m / min, the compressed air flow rate in the first blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 13m³ / min. 3 / h~17m 3 / h, the compressed air flow rate in the second blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 6m³ / h. 3 / h~10m 3 / h, the compressed air flow rate in the third blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 6m³ / h. 3 / h~10m 3 / h; When the strip rolling speed is 800≤v<1100m / min, the compressed air flow rate in the first blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 16m³ / min. 3 / h~24m 3 / h, the compressed air flow rate in the second blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 6m³ / h. 3 / h~14m 3 / h, the compressed air flow rate in the third blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 6m³ / h. 3 / h~14m 3 / h; When the strip rolling speed is 1100≤v<1500m / min, the compressed air flow rate in the first blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 16m³ / min. 3 / h~28m 3 / h, the compressed air flow rate in the second blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 9m³ / h. 3 / h~17m 3 / h, the compressed air flow rate in the third blowing beam of the upper surface blowing beam assembly and the lower surface blowing beam assembly is 9m³ / h. 3 / h~17m 3 / h.

[0017] Compared with the prior art, the present invention has the following advantages: 1. The intelligent automatic emulsion purging device and method for cold continuous rolling mills provided by this invention, based on the existing equipment and processes of the exit section of cold continuous rolling mills, comprehensively analyzes the space and environment of the equipment around the exit section, calculates the required emulsion purging airflow intensity for rolling processes of different specifications and speeds, and uses relevant concepts of fluid mechanics to calculate the blowing angle. Combined with the research on the segmented control scheme of blowing during plate width changes, the most critical process parameters of the blowing device, such as air volume, angle, and number of nozzles, are dynamically and automatically adjusted in real time according to the relevant information such as strip width and rolling speed in the secondary control system of the main rolling mill. This improves the emulsion purging efficiency while minimizing compressed air consumption costs and reducing the rate of unqualified products with residual emulsion, thereby improving quality.

[0018] 2. The intelligent automatic emulsion blowing device and method for cold continuous rolling mills provided by this invention can improve the efficiency of emulsion blowing at the exit of the last stand during the rolling process of cold continuous rolling mills, while reducing the space occupied by equipment at the mill exit and reducing the consumption of compressed air. It can intelligently and automatically adjust the angle, air volume and blowing effect of the blowing system according to the rolling specifications and speed, so as to achieve the greatest improvement in emulsion blowing efficiency with the minimum equipment investment, and optimize the emulsion blowing system at the exit of cold continuous rolling mills.

[0019] Based on the above reasons, this invention can be widely applied in fields such as emulsion blowing during rolling. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the cold rolling mill.

[0022] Figure 2 This is a schematic diagram of the automatic purging device of the present invention.

[0023] In the diagram: 1. Upper surface air blower beam assembly; 2. Lower surface air blower beam assembly; 3. Air supply hose; 4. Rotating shaft; 5. Servo motor; 6. Air blower nozzle; 7. Solenoid valve; 8. First air blower beam; 9. Second air blower beam; 10. Third air blower beam. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0028] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0029] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0030] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0031] Example 1 This invention provides an intelligent automatic emulsion blowing device for a cold continuous rolling mill, comprising: an upper surface blowing beam assembly 1, a lower surface blowing beam assembly 2, and multiple air supply hoses 3. The upper surface blowing beam assembly 1 and the lower surface blowing beam assembly 2 are arranged vertically between the roll exit and tension roll in the mill exit section, respectively, for blowing the upper and lower surfaces of the strip. Each blowing beam assembly has two ends connected to a rotating shaft 4. One side of the rotating shaft 4 is rotatably connected to the mill stand, and the other side of the rotating shaft 4 is rotatably connected to the mill stand and connected to a servo motor 5. Machine 5 is installed on the rolling mill stand; the upper surface blowing beam assembly 1 and the lower surface blowing beam assembly 2 have the same structure, both including multiple blowing beams. Adjacent blowing beams in each assembly are fixedly connected by partitions. Each blowing beam segment is connected to a corresponding air supply hose 3. Multiple air supply hoses 3 are connected to external air supply equipment to deliver compressed air into the blowing beams. Each blowing beam segment is equipped with multiple blowing nozzles 6, which are connected to the corresponding air supply hoses 3 via the blowing beams. Solenoid valves 7 are connected to the blowing nozzles 6. This invention achieves an innovative upgrade to an intelligent and automated blowing system, improving operational efficiency while reducing the defect rate.

[0032] Preferably, each blower beam assembly has three sections: a first blower beam 8 located in the middle, and second and third blower beams 9 and 10 located on either side of the first blower beam 8. The first blower beam 8 has 5-8 blower nozzles 6, while the second and third blower beams 9 and 10 each have 4-5 blower nozzles 6. The blower nozzles 6 are flat-mouthed. All the blower nozzles 6 on each blower beam assembly are arranged on the same plane. The rotating shaft 4 connected to each servo motor 5 rotates within ±90°.

[0033] Example 2 like Figures 1 to 2 As shown, the present invention provides an intelligent automatic emulsion blowing device for a cold continuous rolling mill, comprising an upper surface blowing beam assembly 1, a lower surface blowing beam assembly 2, six air supply hoses 3, a rotating shaft 4, a servo motor 5, etc. The upper surface blowing beam assembly 1 and the lower surface blowing beam assembly 2 have the same structure, and each blowing beam assembly consists of three blowing beams.

[0034] The present invention provides an intelligent automatic emulsion purging method for cold continuous rolling mills, specifically comprising: 1. Measure the height and width of the space between the roll exit and the tension roll in the original rolling mill exit section, and determine the dimensions of each component of the purging device of the present invention by combining the spatial location of the surrounding equipment and facilities in this area.

[0035] 2. The number of nozzles on the blower device is rearranged, and each blower beam assembly is segmented and isolated. The 2000mm long blower beam is divided into three sections, with adjacent sections completely separated by partitions. Each section is equipped with an independent air supply hose 3. The middle section (first blower beam 8) is 1000mm long, and the two side sections (second blower beam 9 and third blower beam 10) are each 500mm long. Five flat-mouth nozzles (model 6513) controlled by a solenoid valve 7 are installed every 200mm in the middle section; four flat-mouth nozzles (model 5015) are installed every 125mm on each of the two side sections.

[0036] 3. Both ends of each blowing beam assembly are fixed on a rotating shaft 4 driven by a servo motor 5. The rotating shaft 4 drives the blowing beam assembly to rotate. The rotating shaft 4 can rotate arbitrarily within ±90° according to the angle command sent by the secondary control system of the main rolling mill (existing system), thereby changing the angle between the blowing nozzle 6 and the strip.

[0037] 4. In the secondary control system of the rolling mill main line, set up a program (existing program) for the control of process parameters of the purging system. The specific control scheme is as follows: (1) The angles of the upper surface blowing beam assembly 1 and the lower surface blowing beam assembly 2 are correlated with the strip rolling speed, so as to adjust the blowing angle of the upper surface blowing beam assembly 1 and the lower surface blowing beam assembly 2 according to different real-time strip rolling speeds, thereby achieving the most efficient blowing effect. The specific correspondence between the strip rolling speed and the blowing beam assembly angle is shown in Table 1.

[0038] Table 1. Correspondence between strip rolling speed and blowing beam angle

[0039] (2) The number of air nozzles 6 is linked to the strip width specification for control. That is, based on the width range of the online steel coil, the opening and closing of the air nozzle solenoid valves 7 at different sections and positions are automatically controlled. The specific relationship between the strip width and the number and position of the air nozzles in each section is shown in Table 2.

[0040] Table 2. Correspondence between the number of blower nozzles and the width of the strip steel.

[0041] (3) The flow rate of compressed air in the blower beam is linked to the strip rolling speed for control. That is, the flow rate of compressed air is automatically controlled according to the rolling speed of the online steel coil. The specific correspondence between the flow rate of compressed air and the rolling speed is shown in Table 3.

[0042] Table 3. Correspondence between compressed air flow rate and strip rolling speed

[0043] Before using the device of the present invention, the residual defect rate of emulsion in the rolling mill process was about 0.78%. After using the device of the present invention, the residual defect rate of emulsion in the rolling mill process was reduced to about 0.33%.

[0044] Examples 1-5 below show different blowing device parameter schemes for strip steel of different specifications at different rolling speeds. It can be seen that the blowing device parameters can be flexibly changed according to the strip steel specifications and speed. After implementing this scheme, the residual emulsion of unqualified products is effectively eliminated.

[0045]

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent automatic emulsion blowing device for a cold continuous rolling mill, characterized in that, include: The upper surface blowing beam assembly (1), the lower surface blowing beam assembly (2), and multiple air supply hoses (3) are arranged vertically between the roll outlet and the tension roll in the mill exit section, respectively, to blow the upper and lower surfaces of the strip steel. Each blowing beam assembly is connected to a rotating shaft (4) at both ends. One side of the rotating shaft (4) is rotatably connected to the mill stand, and the other side of the rotating shaft (4) is rotatably connected to the mill stand and connected to a servo motor (5). The servo motor (5) is installed on the mill stand. The upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) have the same structure, both including multiple blowing beams. Adjacent blowing beams are fixedly connected by partitions. Each blowing beam is connected to a corresponding air supply hose (3). The multiple air supply hoses (3) are all connected to external air supply equipment for supplying compressed air into the blowing beam. Each blowing beam is provided with multiple blowing nozzles (6). The blowing nozzles (6) are connected to the corresponding air supply hoses (3) through the blowing beam. The blowing nozzles (6) are connected to a solenoid valve (7).

2. The intelligent automatic emulsion blowing device for cold continuous rolling mills according to claim 1, characterized in that, Each blower beam assembly has three sections: a first blower beam (8) located in the middle, and a second blower beam (9) and a third blower beam (10) located on both sides of the first blower beam (8).

3. The intelligent automatic emulsion blowing device for cold continuous rolling mills according to claim 2, characterized in that, The first blower beam (8) is provided with 5 to 8 blower nozzles (6), and the second blower beam (9) and the third blower beam (10) are each provided with 4 to 5 blower nozzles (6). The blower nozzles (6) are flat-mouth nozzles.

4. The intelligent automatic emulsion blowing device for cold continuous rolling mills according to claim 1, characterized in that, Multiple blower nozzles (6) on each blower beam assembly are arranged on the same plane.

5. The intelligent automatic emulsion blowing device for cold continuous rolling mills according to claim 1, characterized in that, The shaft (4) rotates within ±90°.

6. An intelligent automatic emulsion purging method for cold continuous rolling mills, characterized in that, The intelligent automatic emulsion blowing device for cold continuous rolling mills as described in any one of claims 1-5 includes the following steps: S1. Measure the height and width of the space between the roll exit and the tension roll in the mill exit section, and determine the dimensions of each component of the purging device based on the spatial location of the surrounding equipment and facilities in this area. S2. Each blower beam assembly is divided into sections and isolated. The number of blower nozzles (6) on each blower beam section is arranged and the opening and closing of the blower nozzles (6) is controlled by a solenoid valve (7). S3. Fix both ends of each blower beam assembly to the rotating shaft (4) driven by the servo motor (5), and drive the blower beam assembly to rotate through the rotating shaft (4) to change the angle between the blower nozzle (6) and the strip steel. S4. During the rolling process, the blowing volume, blowing angle, and number of blower nozzles (6) of the blowing device are automatically adjusted in real time according to the strip width and strip rolling speed to achieve the blowing of the emulsion: S41. The angles of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) are correlated with the strip rolling speed, so as to adjust the blowing angles of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) according to different real-time strip rolling speeds during the rolling process. S42. The number of blower nozzles (6) is linked to the strip width specification for control. Based on the width range of the online steel coil, the opening and closing of the solenoid valves (7) on the blower nozzles (6) at different sections and positions is controlled. S43. The flow rate of compressed air in the blower beam is linked to the strip rolling speed for control. The flow rate of compressed air is controlled according to the online rolling speed of the steel coil.

7. The intelligent automatic emulsion purging method for cold continuous rolling mills according to claim 6, characterized in that, In S41, when the strip rolling speed is 200≤v<500m / min, the blowing angle of the upper surface blowing beam assembly (1) is -50~-40°, and the blowing angle of the lower surface blowing beam assembly (2) is 40°~50°. When the strip rolling speed is 500≤v<800m / min, the blowing angle of the upper surface blowing beam assembly (1) is -40°~-30°, and the blowing angle of the lower surface blowing beam assembly (2) is 35°~45°. When the strip rolling speed is 800≤v<1100m / min, the blowing angle of the upper surface blowing beam assembly (1) is -34°~-26°, and the blowing angle of the lower surface blowing beam assembly (2) is 31°~39°. When the strip rolling speed is 1100≤v<1500m / min, the blowing angle of the upper surface blowing beam assembly (1) is -24°~-16°, and the blowing angle of the lower surface blowing beam assembly (2) is 21°~29°.

8. The intelligent automatic emulsion purging method for cold continuous rolling mills according to claim 6, characterized in that, In S42, when the strip width is 800≤w<1000mm, 5~8 air nozzles (6) are opened on the first air beam (8) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2), and 0~1 air nozzles (6) are opened on the second air beam (9) and the third air beam (10) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2). When the strip width is 1000≤w<1200mm, 5~8 air nozzles (6) are opened on the first air beam (8) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2), and 1~2 air nozzles (6) are opened on the second air beam (9) and the third air beam (10) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2). When the strip width is 1200≤w<1350mm, 5~8 air nozzles (6) are opened on the first air beam (8) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2), and 2~3 air nozzles (6) are opened on the second air beam (9) and the third air beam (10) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2). When the strip width is 1350≤w<1500mm, 5~8 air nozzles (6) are opened on the first air beam (8) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2), and 3~4 air nozzles (6) are opened on the second air beam (9) and the third air beam (10) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2). When the strip width is 1500≤w<1700mm, 5~8 air nozzles (6) are opened on the first air beam (8) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2), and 4~5 air nozzles (6) are opened on the second air beam (9) and the third air beam (10) of the upper surface air beam assembly (1) and the lower surface air beam assembly (2).

9. The intelligent automatic emulsion purging method for cold continuous rolling mills according to claim 6, characterized in that, In S43, when the strip rolling speed is 200≤v<500m / min, the compressed air flow rate in the first blowing beam (8) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 10m³ / min. 3 / h~14m 3 / h, the compressed air flow rate in the second blowing beam (9) and the third blowing beam (10) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 4m³ / h. 3 / h~8m 3 / h; When the strip rolling speed is 500≤v<800m / min, the compressed air flow rate in the first blowing beam (8) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 13m³ / min. 3 / h~17m 3 / h, the compressed air flow rate in the second blowing beam (9) and the third blowing beam (10) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 6m³ / h. 3 / h~10m 3 / h; When the strip rolling speed is 800≤v<1100m / min, the compressed air flow rate in the first blowing beam (8) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 16m³ / min. 3 / h~24m 3 / h, the compressed air flow rate in the second blowing beam (9) and the third blowing beam (10) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 6m³ / h. 3 / h~14m 3 / h; When the strip rolling speed is 1100≤v<1500m / min, the compressed air flow rate in the first blowing beam (8) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 16m³ / min. 3 / h~28m 3 / h, the compressed air flow rate in the second blowing beam (9) and the third blowing beam (10) of the upper surface blowing beam assembly (1) and the lower surface blowing beam assembly (2) is 9m³ / h. 3 / h~17m 3 / h.

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