Strip steel coiling process

Abstract

The present invention discloses a strip steel coiling process, comprising: coiling the strip steel obtained by rolling by means of a coiling device with a cooling component, and when the strip steel is coiled to a set distance from the tail, controlling the cooling component to stop cooling; and obtaining a steel coil after the coiling is completed. The steel coil is unloaded, and after the steel coil is transported out of the coiling device, the cooling component is controlled to be reopened. By appropriately adjusting the opening and closing time of the cooling component, the coiling device is prevented from contacting with cooling water, and the technical problem of continuous generation of a large amount of fog in the coiler due to continuous flow of cooling water to the high-temperature strip steel surface in the coiler during the unloading process is prevented, thereby achieving the effect of reducing the fog around the steel coil during the coiling process, improving the effective monitoring of the strip steel, reducing the influence of fog on the tail positioning of the strip steel, and ensuring the continuity of the rolling line production and the stability of the coiling production.

Description

Technical Field

[0001] The invention relates to the technical field of hot-rolled strip steel production, and in particular to a strip steel coiling process. Background Art

[0002] During the coiling and unloading process of the strip, the tail of the strip needs to be positioned. In winter or low temperature environments, the strip and equipment are in a foggy environment, the on-site working conditions are poor, the visibility is limited during coiling and unloading, and there are technical problems such as difficulty in positioning the tail of the strip, which may even lead to the failure to unload the steel coil in time, or poor tail positioning, resulting in abnormal unloading such as the tail scraping the equipment, coiling off, and tail folding, which prolongs the production rhythm of the rolling line and seriously affects the continuity of the production rhythm and the stability of coiling production. Summary of the invention

[0003] In order to solve the above technical problems, a strip coiling process is provided to ensure the tail positioning of coiling and unloading, avoiding a series of technical problems caused by poor tail positioning.

[0004] The technical solution for achieving the technical purpose of the present invention is a strip steel coiling process, comprising:

[0005] The rolled steel strip is coiled by a coiling device with a cooling assembly, and when the steel strip is coiled to a set distance from the tail, the cooling assembly is controlled to stop cooling; the coiling is completed to obtain a steel coil;

[0006] The steel coil is unloaded, and after the steel coil is transported out of the coiling device, the cooling component is controlled to be reopened.

[0007] Further, the coiling equipment comprises a roller table, a pressure roller, a pinch roller and a coiler arranged in sequence along the conveying direction of the strip steel, and the coiler comprises an auxiliary coiling roller and a reel; the cooling assembly is used to cool the roller table, the pressure roller, the pinch roller, the auxiliary coiling roller and the reel;

[0008] The coiling of the rolled steel strip by means of a coiling device with a cooling component specifically includes, before the head of the steel strip enters the coiler, controlling the cooling component to cool the roller table, the pressure roller, the pinch roller, the auxiliary coiling roller and the reel.

[0009] Furthermore, the coiling of the rolled steel strip by means of a coiling device with a cooling component specifically includes, when the head of the steel strip enters the coiler, controlling the cooling component to stop cooling the roller table, the reel and the auxiliary coiling roller.

[0010] Further, the coiling of the strip to a set distance from the tail portion is specifically, the tail end of the strip is moved to a position at a distance D from the pinch roller.

[0011] Furthermore, the distance D is ≤ 100 m.

[0012] Furthermore, the distance D is 0m≤D≤15m.

[0013] Furthermore, the unloading of the steel coil specifically includes:

[0014] Control the unloading trolley to rise until it contacts the steel coil, open the support arm of the reel, and control the reel to rotate so that the tail end of the strip is positioned at a set position;

[0015] The rollers of the coil unloading trolley are controlled to be locked, the reel is controlled to be retracted and reversed, and the coil unloading trolley is controlled to move laterally, so as to unload the steel coil from the coiler.

[0016] Further, the reel is controlled to rotate so that the tail end of the steel strip is positioned at a set position, specifically, the reel is controlled to rotate until the tail end of the steel strip is located at the four o'clock direction to the six o'clock direction.

[0017] Furthermore, during the process of coiling the strip steel and / or during the process of uncoiling the steel coil, the strip steel coiling process further includes: auxiliary cooling and mist dispersion of the coiler by a fan.

[0018] Further, controlling the cooling component to stop cooling specifically includes: controlling the solenoid valve of the cooling component to close.

[0019] It can be seen from the above technical scheme that the strip steel coiling process provided by the present invention is to coil the strip steel obtained by rolling through a coiling device with a cooling component, and when the strip steel is coiled to a set distance from the tail, the cooling component is controlled to stop cooling; the coiling is completed to obtain a steel coil. By shutting off the cooling water used to cool the component device in the coiling device in advance before the tail of the strip steel enters the coiler, the effect of preventing the coiling device from contacting with the cooling water and continuing to produce a large amount of mist, reducing the mist around the steel coil during the coiling process and the unloading process, improving the effective monitoring of the strip steel, reducing the influence of the mist on the tail positioning of the strip steel, and ensuring the continuity of the rolling line production and the stability of the coiling production is achieved.

[0020] The steel coil is unloaded, and after the steel coil is transported out of the coiling equipment, the cooling component is controlled to be turned on again. After the steel coil is transported out of the coiler, it is no longer affected by the fog on site, and the on-site monitoring environment is greatly improved; at the same time, the equipment cooling water is turned on in time to reduce the high temperature impact of the steel coil on the coiling equipment during coiling and unloading, and prepare for the next coiling.

[0021] The strip coiling process provided by the present invention effectively avoids the conditions for fog formation by properly adjusting the opening and closing time of the cooling component, solves the technical problem in the existing technology that the equipment in the winter or at low temperature is foggy and it is difficult to unload the coil after coiling, and can be promoted and applied to the water volume control of the rolling mill cooling water during the slow steel tapping standby in winter, and the intermittent opening of the laminar roller cooling water to reduce the generation of winter fog. On the basis of the existing technology, the production rhythm of the rolling line is improved to ensure smooth production and the continuity of the rolling line production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A flow chart of a strip steel coiling process provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0024] The present invention provides a strip steel coiling process, which effectively avoids fog formation conditions by properly adjusting the opening and closing time of the cooling component, improves the production rhythm of the rolling line, and ensures smooth production and continuity of rolling line production. The present invention is described in detail below through an embodiment and an application example:

[0025] Example

[0026] In winter or in low temperature environments, a large amount of fog will be generated in the equipment and the environment in a short period of time, and it is not easy to dissipate, resulting in poor working conditions on site. After the strip is coiled, the steel coil is surrounded by fog in the coiler, and the tail of the strip cannot be monitored, resulting in the steel coil being unable to be unloaded normally, or the tail is poorly positioned, causing the tail to scrape the equipment, fall off, fold the tail, and other abnormal unloading conditions. Unloading in a foggy environment is difficult.

[0027] In order to solve the problem that visibility is reduced due to a large amount of fog and the monitoring and positioning of the tail of the strip is seriously affected, an embodiment of the present invention provides a strip coiling process, including:

[0028] The rolled steel strip is coiled by a coiling device with a cooling component. When the steel strip is coiled to a set distance from the tail, the cooling component is controlled to stop cooling; the coiling is completed to obtain a steel coil. By shutting off the cooling water used to cool the components in the coiling device in advance before the tail of the steel strip enters the coiler, the coiling device is prevented from continuously generating a large amount of mist in contact with the cooling water, and the mist around the steel coil during the coiling process is reduced, thereby improving the effective monitoring of the steel strip, reducing the influence of the mist on the tail positioning of the steel strip, and ensuring the continuity of the rolling line production and the stability of the coiling production.

[0029] The steel coil is unloaded, and after the steel coil is transported out of the coiling equipment, the cooling component is controlled to be turned on again. After the steel coil is transported out of the coiler, it is no longer affected by the fog on site, and the on-site monitoring environment is greatly improved; at the same time, the equipment cooling water is turned on in time to reduce the high temperature impact of the steel coil on the coiling equipment during coiling and unloading, and prepare for the next coiling. It can minimize the impact of the fog in the coil on the unloading of the coil, which is conducive to the smooth off-line of the steel coil, prevent the possibility of coil jamming and coil drop, and prevent the impact of the tail folding on the pallet coil transportation.

[0030] The strip coiling process provided by the present invention effectively avoids the conditions for fog formation by properly adjusting the opening and closing time of the cooling component, solves the technical problem in the existing technology that the equipment is foggy in winter or at low temperatures, and it is difficult to unload the coil after coiling. It can be promoted and applied to the control of the amount of cooling water of the rolling mill when it is in standby mode in winter, and the intermittent opening of the laminar roller cooling water to reduce the generation of fog in winter. On the basis of the existing technology, the production rhythm of the rolling line is improved to ensure smooth production and the continuity of the rolling line production.

[0031] The strip steel coiling process provided in this embodiment is particularly suitable for winter when the temperature outside the factory is below 10°C, especially below -5°C. At this time, when the coiling equipment is cooled, a large amount of fog is formed in a short time and is not easy to dissipate. In order to take into account both the rolling line production and the protection of the coiling equipment, in this embodiment, in the strip steel production process, if the visibility range of the cross section of the steel coil is less than half of the outer diameter of the steel coil during the process of coiling the steel strip and / or during the process of uncoiling the steel coil, the strip steel coiling process is enabled to reduce the medium source of the fog generation and facilitate the positioning of the tail of the strip steel during the coiling and uncoiling process.

[0032] In order to convey the steel strip and coil it, in this embodiment, the coiling equipment includes a roller table, a pressure roller, a pinch roller and a coiler arranged in sequence along the conveying direction of the steel strip, and the coiler includes a coiling roller and a reel to thread the steel strip and tension it on the reel for coiling. Since the temperature of the steel strip obtained by rolling is high, the temperature of all coiling equipment in contact with the steel strip will rise. In order to protect all equipment, in this embodiment, the cooling assembly is used to cool the roller table, the pressure roller, the pinch roller, and the coiling roller and reel of the coiler.

[0033] In order to achieve one-to-one cooling control of the equipment, in this embodiment, the cooling water is closed or conducted by the corresponding electromagnetic valve. Controlling the cooling component to stop cooling specifically includes: controlling the electromagnetic valve of the cooling component to close.

[0034] In order to achieve the best cooling effect and simplify the control process, in this embodiment, the rolled strip is coiled by a coiling device with a cooling component. Specifically, before the head of the strip enters the coiler, the cooling component is controlled to cool the roller, the pressure roller, the pinch roller, the auxiliary coiling roller and the reel, so as to cool all the equipment in contact with the strip at the same time.

[0035] Since the tail positioning of the strip mostly occurs in the coiler, the coiling equipment with cooling components is used to coil the rolled strip. Specifically, when the head of the strip enters the coiler, the cooling components are controlled to stop cooling the roller table, the reel and the auxiliary coiling roller, so as to prevent the continuous generation of a large amount of fog in the coiler, which makes it impossible to unload the coiled steel coil normally, and reduce the difficulty of tail positioning monitoring. Normal rolling rhythm,

[0036] Since the surface temperature of the hot-rolled strip is high, the equipment in direct contact with the strip will cause the temperature to rise rapidly, and water cooling is essential. The present invention does not specifically limit the node for controlling the cooling component to shut down the cooling. In production, the distance to shut down the equipment cooling water from the tail of the strip can be set in advance based on the relationship between the type of coiled steel, temperature, on-site air temperature, amount of equipment cooling water, etc., and the relationship between the size of fog in the coiler and the preset distance in actual production, while protecting the equipment. In this embodiment, when the strip is coiled to the set distance from the tail, specifically, when the tail end of the strip moves to the position of the distance D from the pinch roller.

[0037] In order to control the production rhythm and protect the equipment and extend the life of the equipment, the spacing D should be combined with the actual production on site. In some implementations, the spacing D≤100m is also within the acceptable range.

[0038] Generally, the spacing D is ≤ 20 m. Preferably, in this embodiment, the spacing D is 0 m ≤ D ≤ 15 m, such as 2 m, 5 m, 8 m, 10 m, 12 m, etc.

[0039] In the prior art, the unloading process is to first control the rotation of the reel and locate the tail of the strip, and then open the support arm of the reel to unload the coil. However, in this embodiment, due to the large structure of the support arm itself and the large shielding range, under the premise of more fog in the reel machine, it is more difficult for the operator to determine the tail location, which prolongs the judgment time to a certain extent, resulting in a longer unloading rhythm. In order to maintain the normal production rhythm or even improve the production rhythm, in this embodiment, the steel coil is unloaded, specifically including:

[0040] The unloading trolley is controlled to rise to contact with the steel coil, the support arm of the reel is opened, and the reel is controlled to rotate so that the tail end of the strip is positioned at the set position; the roller of the unloading trolley is controlled to lock, the reel is controlled to shrink and reverse, and the unloading trolley is controlled to move horizontally to unload the steel coil from the coiler. By changing the traditional process sequence and opening the support arm before positioning the tail of the steel coil, the support arm can reduce the obstruction of the steel coil and increase the observation window, thereby ensuring that the tail positioning before unloading is completed in time after the strip is coiled.

[0041] In order to avoid the influence of the tail folding caused by the uncoiling of the steel coil on the pallet coil transportation, in this embodiment, the rotation of the reel is controlled to position the tail end of the steel coil to the set position. Specifically, the reel is controlled to rotate until the tail end of the strip is located at the four o'clock direction to the six o'clock direction, so as to ensure the opening angle of the tail end of the steel coil as much as possible under the natural drooping state of the steel coil or the restriction of the unloading trolley.

[0042] In order to assist cooling and improve visibility, in this embodiment, during the process of coiling the strip and / or during the process of uncoiling the steel coil, the strip coiling process also includes: assisting cooling and dispersing mist on the coiler by a fan.

[0043] Application Examples

[0044] Taking a hot rolling mill production line as an example, the equipment parameters of the coiling area of ​​the production line are as follows: 3 sets of down coilers, coiling temperature: 300℃~750℃, maximum weight of steel coil: 28 tons, strip thickness: 1.2m~12.7m, strip width: 700mm~1450mm, inner diameter of steel coil: 727mm~762mm, outer diameter of steel coil: 1050mm~2100mm. The coiling equipment includes: roller table, pressure roller, pinch roller, auxiliary coiling roller and reel. The cooling water is controlled by solenoid valve, and the distance D from the tail to close the cooling water of the equipment is set to 10m.

[0045] During winter production, taking the coiling of steel by the 1# coiler as an example, the coiling steel type is SPHC, the finished product width is 3.0*1250mm, and the coiling temperature is 580℃.

[0046] In controlling the equipment in the coiling area, the specific control method is as follows: before the strip enters the coiler, the cooling water of the roller table, the pressure roller, the pinch roller, the auxiliary winding roller and the reel is turned on; when the strip enters the coiler and is coiled, the cooling water of the reel and the auxiliary winding roller and the cooling water of the previous group of roller tables of the coiler are controlled to be closed, and the cooling water of the pressure roller and the pinch roller is turned on, that is, the cooling of some equipment is stopped. It should be noted that, generally, other roller tables are normally open during the process without affecting the coiling temperature. When the strip is coiled to a position where the tail end is 10m away from the pinch roller, the cooling water of the pressure roller and the pinch roller is turned off, and the cooling water of the roller table, the reel, and the auxiliary roll is kept in the closed state; after the strip is coiled, the unloading trolley rises to contact the steel coil and lifts the steel coil. After the positioning is completed, the support arm opens, and the tail of the steel coil is positioned to the unloading position from 4 o'clock to 6 o'clock. The unloading trolley roller is locked, the reel shrinks and reverses, and the unloading trolley moves horizontally to unload the steel coil from the coiler. When the steel coil is transported out of the coiler, the cooling water of the control roller table, the pressure roller, the pinch roller, the auxiliary roll and the reel are reopened.

[0047] The strip coiling process provided by the embodiment of the present invention can prevent the continuous generation of a large amount of fog in the coiler and increase the monitoring window in the coiler by changing the traditional coiling cooling water control method and the support arm opening timing when unloading the coil, thereby ensuring that the tail positioning before unloading is completed in time after the strip coiling is completed, preventing the deterioration of the on-site working environment, reducing the difficulty of tail positioning, and improving the continuity of rolling line production and the stability of coiling production. Technical effect.

[0048] Through the above embodiments, the present invention has the following beneficial effects or advantages:

[0049] 1) The strip coiling process provided by the present invention is used to solve the problem that a large amount of fog is generated in the coiling area of ​​the coiler in winter and is not easy to dissipate, so that the strip cannot be unloaded normally after coiling. The conventional response method is to increase the insulation of the factory building by adding fans, but the effect is not ideal. A large amount of fog is continuously generated in the coiler and is not easy to dissipate, so that the steel coil cannot be unloaded in time, resulting in the inability to improve the production rhythm of the rolling line, affecting the machine hourly output. By properly adjusting the opening and closing time of the cooling component, the coiling equipment is prevented from contacting with the cooling water, and the technical problem of the continuous flow of cooling water to the high-temperature strip surface in the coiler during the unloading process is prevented, which causes the continuous generation of a large amount of fog in the coiler. The effect of reducing the fog around the steel coil during the coiling process is achieved, the effective monitoring of the strip is improved, the influence of fog on the tail positioning of the strip is reduced, and the continuity of the rolling line production and the stability of the coiling production are ensured.

[0050] 2) By opening the support arm before unloading the coil to increase the observation window in the coiler, and appropriately adjusting the switching timing of the cooling water, the fog formation conditions are effectively avoided. This control method can minimize the impact of the fog in the coiler on the unloading of the coil, which is conducive to the smooth unloading of the steel coil, preventing the occurrence of coil jamming, coil falling, and preventing the folding of the tail of the steel coil from affecting the pallet coil transportation. At the same time, the strip coiling process can reduce the slab in the furnace time and fuel consumption and slab oxidation and burning loss, so as to achieve the technical effect of improving the production rhythm and promoting the stability and continuity of rolling line production.

[0051] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A strip steel coiling process, characterized in that: include: The rolled steel strip is coiled by a coiling device with a cooling assembly, and when the steel strip is coiled to a set distance from the tail, the cooling assembly is controlled to stop cooling; the coiling is completed to obtain a steel coil; Unloading the steel coil, and after the steel coil is transported out of the coiling device, controlling the cooling component to be reopened; The coiling equipment comprises a roller table, a pressure roller, a pinch roller and a coiler arranged in sequence along the conveying direction of the strip steel, and the coiler comprises an auxiliary coiling roller and a reel; the cooling assembly is used to cool the roller table, the pressure roller, the pinch roller, the auxiliary coiling roller and the reel; The coiling device with a cooling assembly is used to coil the rolled steel strip, which specifically includes, before the head of the steel strip enters the coiler, controlling the cooling assembly to cool the roller, the pressing roller, the pinch roller, the auxiliary coiling roller and the reel; The coiling device with a cooling assembly is used to coil the rolled steel strip, and specifically includes, when the head of the steel strip enters the coiler, controlling the cooling assembly to stop cooling the roller table, the reel and the auxiliary coiling roller; Controlling the cooling water of the pressing roller and the pinch roller to start; During the process of coiling the steel strip and / or during the process of uncoiling the steel coil, the steel strip coiling process further includes: auxiliary cooling and mist dispersion of the coiler by a fan.

2. The strip coiling process according to claim 1, characterized in that: The coiling of the strip to a set distance from the tail portion specifically refers to moving the tail end of the strip to a position at a distance D from the pinch roller.

3. The strip coiling process according to claim 2, characterized in that: The distance D is ≤ 100 m.

4. The strip coiling process according to claim 3, characterized in that: The distance D is 0m≤D≤15m.

5. The strip coiling process according to claim 1, characterized in that: The unloading of the steel coil specifically comprises: Control the unloading trolley to rise until it contacts the steel coil, open the support arm of the reel, and control the reel to rotate so that the tail end of the strip is positioned at a set position; The rollers of the coil unloading trolley are controlled to be locked, the reel is controlled to be retracted and reversed, and the coil unloading trolley is controlled to move laterally, so as to unload the steel coil from the coiler.

6. The strip coiling process according to claim 5, characterized in that: The controlling the reel to rotate so that the tail end of the steel strip is positioned at a set position is specifically controlling the reel to rotate until the tail end of the steel strip is located at the four o'clock direction to the six o'clock direction.

7. The strip coiling process according to any one of claims 1 to 6, characterized in that: The controlling the cooling component to stop cooling specifically includes: controlling the solenoid valve of the cooling component to close.

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