Strip steel on-line loop cooling device for thin strip casting and rolling production line and using method thereof

Abstract

The invention relates to a strip steel online loop cooling device for a thin strip casting and rolling production line and a using method of the strip steel online loop cooling device. The cooling water tank is arranged below the strip steel on the production line, and cooling liquid for cooling the strip steel circularly flows in the cooling water tank; the double-layer loop roller structure is used for bending the strip steel at a set angle and then enabling the strip steel to enter the cooling liquid of the cooling water tank; the strip steel passes through the roller way structure and is used for conveying the head of the strip steel and assisting in threading; the strip steel passes through the rollers and the double-layer loop roller sets are arranged in a crossed mode in the running direction of the strip steel. And the control part is used for controlling the temperature of the cooling liquid in the cooling water tank and the working state of the double-layer loop roller structure. The cooling water tank, the double-layer loop roller structure and the strip steel passing roller way structure are integrally arranged, so that the automation level and the control precision of the cooling process are improved, the stability and the controllability of the cooling process are ensured, the energy consumption is effectively reduced, and powerful support is provided for improving the production efficiency and the product quality.

Description

Technical Field

[0001] The invention relates to the technical field of thin strip casting and rolling, and in particular to an online looper cooling device for strip steel in a thin strip casting and rolling production line and a use method thereof. Background Art

[0002] In the production of traditional hot-rolled ultra-thin strips, the cooling process is one of the key factors affecting the performance of the final product. However, existing mist cooling equipment often has problems such as uneven cooling effect and inaccurate zoning control, which leads to large temperature gradients and significant differences in microstructure and performance during the cooling process of the strip, thus affecting key indicators such as strip shape, strength, and toughness.

[0003] The cooling device of thin strip casting and rolling plays a key role because it cools the strip steel during ultra-thin strip rolling. It also plays a key role in the development of new steel grades, especially high-strength steel.

[0004] At present, the cooling equipment for thin strip casting and rolling adopts a mist cooling device. Multiple manifolds with mist nozzles are installed in the equipment. The manifolds are controlled separately and the cooling speed is adjusted by changing the water volume. The cooling is done by a manifold. The manifold is usually composed of multiple nozzles arranged in a certain pattern. These nozzles are responsible for spraying cooling water onto the plate surface in the form of high pressure and high speed. However, due to the specific angle and gap design between the nozzles, this layout can theoretically cover the entire plate surface, but in actual operation, the differences between the nozzles may lead to inconsistent lateral cooling intensity of the plate surface. In addition, the cooling water cannot be discharged from the plate surface in time, resulting in the retention of cooling water on the plate surface, resulting in uneven distribution of cooling water flow on the plate surface. This unevenness is not only reflected in the area where the nozzle is directly sprayed, but also due to the different angles and gaps, the cooling intensity of the overlapping area and edge area between adjacent nozzles is significantly different.

[0005] In addition, the flow and drainage of cooling water on the board surface is also an important factor affecting cooling uniformity. Ideally, the cooling water should quickly and evenly cover the entire board surface, and then be quickly discharged through gravity or a designed drainage system to avoid water accumulation on the board surface. However, in actual operation, if the board surface design is not conducive to the flow of water (such as depressions, protrusions or impurities), or the drainage system is not designed properly, the cooling water will be retained in certain areas of the board surface and cannot be discharged in time. The retention of such cooling water will not only reduce the cooling efficiency of the area, but may also cause local corrosion or deformation of the board surface due to long-term immersion, further exacerbating the problem of uneven cooling.

[0006] In summary, the differences in angles and gaps between nozzles in the header cooling system, and the flow and discharge of cooling water on the plate surface, together lead to inconsistent lateral cooling intensity of the plate surface and the retention of cooling water on the plate surface, which in turn causes uneven cooling of the plate surface, affecting the shape of the strip and resulting in poor lateral performance of the strip.

[0007] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes an online looper cooling device for strip steel in a thin strip casting and rolling production line and a method of using the same to overcome the defects of the prior art. Summary of the invention

[0008] The purpose of the present invention is to provide an online looper cooling device for strip steel in a thin strip casting and rolling production line and a method for using the same, so as to solve a series of complex problems such as the irregular flow of strip steel on the surface of the steel plate and the difficulty in accurately controlling the cooling effect during the current cooling process, which in turn has an adverse effect on the strip steel plate shape and causes a significant increase in the lateral performance difference of the strip steel. The present invention integrates a cooling water trough, a double-layer looper roller structure and a strip steel passing roller structure, which not only improves the automation level and control accuracy of the cooling process, ensures the stability and controllability of the cooling process, but also effectively reduces energy consumption, prolongs the service life of the strip steel, and provides strong support for improving production efficiency and product quality.

[0009] The object of the present invention is achieved by providing an online looper cooling device for a thin strip casting and rolling production line, comprising:

[0010] A cooling water tank is arranged below the steel strip on the production line, the top of the cooling water tank is open, and a coolant for cooling the steel strip circulates in the cooling water tank;

[0011] A double-layered looper roller structure is used to bend the steel strip at a set angle and then allow it to enter the cooling liquid in the cooling water tank; the double-layered looper roller structure comprises at least two groups of double-layered looper rollers that can be independently lifted and lowered through the opening, each of the double-layered looper rollers comprises an upper looper roller and a lower looper roller that are arranged opposite to each other and spaced apart, and a steel strip channel is formed between the upper looper roller and the lower looper roller of each double-layered looper roller group;

[0012] The strip steel passing roller structure is used for conveying the strip steel head and assisting strip threading; the strip steel passing roller structure comprises at least three strip steel passing rollers arranged above the opening, each of the strip steel passing rollers and each of the double-layer looper roller groups are arranged crosswise along the running direction of the strip steel; after each of the double-layer looper roller groups is raised, the top surface of each of the lower looper rollers and the top surface of each of the strip steel passing rollers are located at the same horizontal plane;

[0013] The control unit is used to control the temperature of the coolant in the cooling water tank and the working state of the double-layered looper roller structure.

[0014] In a preferred embodiment of the present invention, a coolant inlet and a coolant outlet are respectively arranged on opposite sides of the cooling water trough along the running direction of the strip, an inlet regulating valve is arranged at the coolant inlet, and an outlet regulating valve is arranged at the coolant outlet. A temperature sensor is arranged in the cooling water trough, and the inlet regulating valve, the outlet regulating valve and the temperature sensor are electrically connected to the control unit. The control unit adjusts the opening of the inlet regulating valve and the outlet regulating valve according to the temperature parameter transmitted by the temperature sensor to intelligently adjust the temperature of the coolant in the cooling water trough.

[0015] In a preferred embodiment of the present invention, the temperature sensor includes an inlet temperature sensor provided at the coolant inlet and an outlet temperature sensor provided at the coolant outlet.

[0016] In a preferred embodiment of the present invention, the coolant inlet is arranged on the side of the cooling water trough located in the direction of the strip incoming, the coolant outlet is arranged on the side of the cooling water trough located in the direction of the strip out, and the coolant inlet is arranged higher than the coolant outlet.

[0017] In a preferred embodiment of the present invention, the double-layered looper roller structure further includes a plurality of lifting structures corresponding to each of the double-layered looper roller groups, and the lifting structures are electrically connected to the control unit.

[0018] In a preferred embodiment of the present invention, each of the lifting structures is provided with a displacement sensor for real-time monitoring of the position of each of the double-layered looping roller groups, and each of the displacement sensors is electrically connected to the control unit.

[0019] In a preferred embodiment of the present invention, the lifting structure is a cylinder structure or a hydraulic cylinder structure.

[0020] In a preferred embodiment of the present invention, strip guide rollers are respectively arranged on the top of both sides of the cooling water trough along the running direction of the strip, and the top surface of each strip guide roller and the top surface of each strip passing roller are located at the same horizontal plane.

[0021] In a preferred embodiment of the present invention, the roller diameters of the upper looper roller, the lower looper roller and the strip passing roller are arranged to be the same.

[0022] The purpose of the present invention can also be achieved in this way. A method for using an online looper cooling device for strip steel in a thin strip casting and rolling production line comprises: in the initial state, the top surface of the lower looper roller and the top surface of each strip passing roller are located at the same horizontal plane; the strip steel is transported to the lower looper roller above the cooling water trough and above the strip passing roller to complete the strip head transportation and auxiliary strip threading; the control unit controls the descent of each double-layer looper roller group, and the strip steel is bent at a specific angle and then smoothly sent into the coolant in the cooling water trough, and the strip steel is in a continuous transportation operation state throughout the process; the control unit intelligently adjusts the temperature of the coolant in the cooling water trough according to the temperature parameters transmitted by the temperature sensor set in the cooling water trough, and the strip steel passing through the cooling water trough is cooled to the set temperature; after completing the online cooling of the strip steel, the control unit controls each double-layer looper roller group to rise and leave the cooling water trough to restore the initial state.

[0023] As described above, the online looper cooling device for strip steel of the thin strip casting and rolling production line of the present invention and the use method thereof have the following beneficial effects:

[0024] The present invention constructs an efficient, precise and flexible strip cooling system, which integrates a cooling water trough, a double-layer looper roller structure and a strip passing roller structure. The cooling water trough takes into account the dual needs of water circulation and temperature control, and has the function of intelligently adjusting the cooling temperature; each double-layer looper roller group of the double-layer looper roller structure can be independently lifted and lowered, and the strip is bent at a specific angle and then smoothly sent into the cooling water trough, thereby improving the flexibility and adaptability of the system, optimizing the path and posture of the strip during the cooling process, and ensuring the consistency and efficiency of the cooling effect; the strip passing roller structure undertakes the tasks of conveying the strip head and assisting in strip threading, ensuring that the strip can transition smoothly and smoothly before entering the cooling zone, avoiding strip damage or blockage caused by improper operation, and improving the continuous operation capacity of the production line.

[0025] The present invention not only improves the automation level and control accuracy of the cooling process, ensures the stability and controllability of the cooling process, but also effectively reduces energy consumption, prolongs the service life of the steel strip, and provides strong support for improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0027] in:

[0028] Figure 1 It is a schematic diagram of the online looper cooling device for strip steel of the thin strip casting and rolling production line when the double-layer looper roller structure of the present invention rises to a high position.

[0029] Figure 2 It is a schematic diagram of the online looper cooling device for strip steel of the thin strip casting and rolling production line when the double-layer looper roller structure of the present invention is lowered into the cooling water tank.

[0030] In the figure:

[0031] 1. Cooling water tank; 11. Open; 12. Cooling liquid inlet; 13. Cooling liquid outlet;

[0032] 2. Double-layer looper roller structure; 21. Upper looper roller; 22. Lower looper roller; 23. Lifting structure;

[0033] 3. Strip steel passes through roller structure; 31. Strip steel passes through roller;

[0034] 4. Strip steel;

[0035] 5. Coolant;

[0036] 6. Strip guide roller. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0038] The specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] The present invention relates to hot-rolled ultra-thin strip casting cooling equipment, and in particular to an online strip cooling device for a new type of thin strip casting production line (hot-rolled ultra-thin strip mill outlet). It mainly solves the problem of cooling uniformity in the strip cooling process of the aerosol cooling equipment in the prior art. The core of the present invention is to innovatively solve the cooling uniformity problem faced by the current aerosol cooling technology in the cooling process of ultra-thin strips, aiming to optimize the organizational structure of the strip by adopting a new cooling method, improve product quality, and at the same time ensure the stability and efficiency of the production process.

[0041] like Figure 1 , Figure 2 As shown, the present invention provides an online looper cooling device for a thin strip casting and rolling production line, comprising:

[0042] The cooling water tank 1 is arranged below the steel strip 4 on the production line. An opening 11 is arranged at the top of the cooling water tank 1. A coolant 5 for cooling the steel strip 4 circulates in the cooling water tank 1. The temperature of the coolant 5 in the cooling water tank 1 can be intelligently controlled.

[0043] The double-layered looper roller structure 2 is used to bend the steel strip 4 at a set angle and then enter the cooling liquid in the cooling water tank 1. Due to the characteristics of the steel strip 4 itself and the processing technology, this type of bending will not affect the quality and performance of the steel strip 4. The double-layered looper roller structure 2 includes at least two groups of double-layered looper roller groups that can be independently lifted and lowered through the opening 11. Each double-layered looper roller group includes an upper looper roller 21 and a lower looper roller 22 that are arranged opposite to each other and parallel to each other. The upper looper roller 21 and the lower looper roller 22 of each double-layered looper roller group form a steel strip channel. Each double-layered looper roller group can independently rise through the opening 11 (driving the steel strip 4) to leave the cooling water tank 1 or descend (driving the steel strip 4) to enter the cooling liquid 5 in the cooling water tank 1.

[0044] The strip passing roller structure 3 is used for conveying the strip head and assisting strip threading; the strip passing roller structure 3 includes at least three strip passing rollers 31 arranged above the opening, each strip passing roller 31 and each double-layer looping roller group are cross-arranged along the running direction of the strip, and one strip passing roller 31 is respectively arranged on both sides of the cooling water trough 1 along the running direction of the strip, and one strip passing roller 31 is arranged between the two groups of double-layer looping roller groups to meet the smooth transportation and bending requirements of the strip 4; after each double-layer looping roller group is raised, the top surface of each lower looping roller 22 and the top surface of each strip passing roller 31 are located at the same horizontal plane, so as to ensure smooth conveying and strip threading of the strip head.

[0045] The control unit is used to control the temperature of the coolant in the cooling water tank 1 and the working state of the double-layer looper roller structure.

[0046] Due to the thickness, temperature and material characteristics of cast and rolled steel strip, the steel strip is sensitive to the heat exchange of cooling water. After the first impact cooling of the coolant (cooling water) on the surface of the steel strip, the cooling water remains and a series of problems such as uneven cooling and uneven steel strip performance are generated. The present invention solves a series of complex problems such as the irregular flow of steel strip on the surface of the steel plate and the difficulty in accurately controlling the cooling effect during the current cooling process, which in turn adversely affects the shape of the steel strip and causes a significant increase in the lateral performance difference of the steel strip, thereby significantly improving the quality and performance stability of the steel strip products.

[0047] The present invention constructs an efficient, accurate and flexible strip cooling system, which integrates a cooling water trough 1, a double-layer looper roller structure 2 and a strip passing roller structure 3. The cooling water trough 1 takes into account the dual needs of water circulation and temperature control, and has the function of intelligently adjusting the cooling temperature; each double-layer looper roller group of the double-layer looper roller structure 2 can be independently lifted and lowered, and the strip is bent at a specific angle and then smoothly sent into the cooling water trough, thereby improving the flexibility and adaptability of the system, optimizing the path and posture of the strip during the cooling process, and ensuring the consistency and efficiency of the cooling effect; the strip passing roller structure 3 undertakes the tasks of conveying the strip head and assisting in strip threading, ensuring that the strip can smoothly and smoothly transition before entering the cooling zone, avoiding damage or blockage of the strip due to improper operation, and improving the continuous operation capacity of the production line.

[0048] The present invention not only improves the automation level and control accuracy of the cooling process, ensures the stability and controllability of the cooling process, but also effectively reduces energy consumption, prolongs the service life of the steel strip, and provides strong support for improving production efficiency and product quality.

[0049] Further, if Figure 1 , Figure 2 As shown, a cooling liquid inlet 12 and a cooling liquid outlet 13 are respectively provided on opposite sides of the cooling water tank 1 along the running direction of the strip, an inlet regulating valve is provided at the cooling liquid inlet 12, and an outlet regulating valve is provided at the cooling liquid outlet 13. A temperature sensor is provided in the cooling water tank 1, and the inlet regulating valve, the outlet regulating valve, and the temperature sensor are electrically connected to the control unit. The control unit adjusts the opening of the inlet regulating valve and the outlet regulating valve according to the temperature parameters transmitted by the temperature sensor to intelligently adjust the temperature of the coolant in the cooling water tank 1.

[0050] The cooling water tank 1 located directly below the steel strip is the core part of the present invention. The cooling water tank 1 is equipped with precise coolant inlet 12 and coolant outlet 13 to ensure that the coolant can flow evenly and efficiently through the surface of the steel strip and effectively take away the heat. The dynamic balance of the cooling water flow is achieved through the fine regulation of the inlet regulating valve and the outlet regulating valve of the cooling water tank 1. The inlet regulating valve and the outlet regulating valve are electrically connected to the control unit to ensure the stability of the coolant temperature and provide a consistent cooling environment for the steel strip.

[0051] Furthermore, the temperature sensor includes an inlet temperature sensor arranged at the coolant inlet and an outlet temperature sensor arranged at the coolant outlet.

[0052] In a specific embodiment of the present invention, the coolant inlet 12 is arranged on the side of the cooling water trough located in the direction of the strip incoming (behind the direction of the strip running), and the coolant outlet 13 is arranged on the side of the cooling water trough located in the direction of the strip removing (in front of the direction of the strip running), and the coolant inlet 12 is arranged higher than the coolant outlet 13.

[0053] Further, if Figure 1 , Figure 2 As shown, the double-layered looper roller structure 2 further includes a plurality of lifting structures 23 corresponding to each double-layered looper roller group, and the lifting structures 23 are electrically connected to the control unit.

[0054] Furthermore, each lifting structure 23 is provided with a displacement sensor for real-time monitoring of the position of each double-layer looping roller group, and each displacement sensor is electrically connected to the control unit.

[0055] In a specific embodiment of the present invention, the lifting structure 23 is a cylinder structure or a hydraulic cylinder structure.

[0056] The double-layer looper roller structure 2 is composed of two layers of looper rollers (upper looper roller 21 and lower looper roller 22). Each double-layer looper roller group is responsible for flexibly adjusting the height under the drive of the lifting structure 23, and smoothly feeding the strip steel 4 into the cooling water tank 1 after bending it at a specific angle. In this process, the lifting and lowering action of each double-layer looper roller group is precisely controlled by a high-precision displacement sensor. The displacement sensor not only monitors the real-time position of the double-layer looper roller group, but also closely links with the inlet temperature sensor and outlet temperature sensor of the cooling water tank 1 to form a closed-loop control system. The system can automatically adjust the immersion depth and residence time of the strip steel 4 in the cooling water tank 1 according to the current temperature of the strip steel 4 and the cooling demand, so as to realize the precise control of the temperature of the strip steel 4.

[0057] Each double-layer looper roller set is designed to be independently raised and lowered, which improves the flexibility and adaptability of the system. According to different strip specifications, materials and cooling requirements, the operator can adjust the height of each double-layer looper roller set individually, thereby optimizing the path and posture of the strip 4 during the cooling process, ensuring the consistency and efficiency of the cooling effect.

[0058] Further, if Figure 1 , Figure 2 As shown, strip guide rollers 6 are respectively arranged on the top of both sides of the cooling water trough 1 along the running direction of the strip, and the top surface of each strip guide roller 6 and the top surface of each strip passing roller 31 are located at the same horizontal plane.

[0059] Further, if Figure 1 , Figure 2As shown, the roller diameters of the upper looper roller 21, the lower looper roller 22 and the strip passing roller 31 are arranged to be the same.

[0060] When the double-layer looper roller group is in the high position, the lower looper roller 22 (the looper roller located below the strip) and the strip passing roller 31 and the strip guide roller 6 jointly undertake the task of conveying the strip head and assisting the strip threading. This design ensures that the strip can transition smoothly before entering the cooling zone, avoids strip damage or blockage caused by improper operation, and improves the continuous operation capacity of the production line.

[0061] The temperature control of the strip steel by the online looper cooling device of the thin strip casting and rolling production line of the present invention mainly includes the following aspects:

[0062] (1) The double-layer looper roller structure 2 is used to lift and lower to achieve strip temperature control:

[0063] In the steel production process, temperature control of the strip is one of the key factors affecting product quality. The present invention adopts an innovative looper roller lifting technology to achieve precise control of the strip temperature. Each double-layer looper roller group is driven up and down by a precisely designed lifting structure 23, and the strip is bent at a certain angle and gradually immersed in or lifted out of the cooling water tank 1. With the lifting and lowering of the double-layer looper roller group, the immersion time, immersion depth and contact area of ​​the strip in the cooling water tank 1 can be flexibly adjusted. Combined with advanced temperature sensors and control units, the temperature changes of the strip are monitored in real time, and the position of the double-layer looper roller group is automatically adjusted accordingly, thereby achieving precise control of the cooling rate of the strip, ensuring that the strip reaches the ideal temperature range when leaving the cooling zone, and improving the dimensional accuracy and mechanical properties of the product.

[0064] (2) Cooling the cast steel strip using cooling water tank 1:

[0065] The cooling technology of cooling water trough 1 is an efficient cooling method for high-temperature strip steel during the casting and rolling process. By setting a continuous cooling water trough 1 on the production line, the strip steel after casting and rolling is directly cooled by flowing coolant (cooling water). The design of the cooling water trough 1 fully considers the principles of water flow dynamics to ensure that the cooling water can evenly and fully cover the surface of the strip steel and effectively take away the heat. At the same time, by adjusting the parameters such as the length, width, water flow rate and water temperature of the cooling water trough 1, the cooling rate and temperature distribution of the strip steel can be flexibly controlled to meet different process requirements. The application of the cooling technology of cooling water trough 1 not only improves the automation degree and cooling efficiency of the production line, but also significantly improves the organizational structure and performance of the strip steel, providing a strong guarantee for the production of high-quality steel products.

[0066] (3) Double-layer looper roller structure 2 and double-layer logistics channel for the strip to pass through the roller structure 3:

[0067] In order to meet the needs of strip production threading and cooling, the present invention proposes a double-layer equipment design scheme of a double-layer looper roller structure 2 and a double-layer equipment design scheme of a strip passing through a roller structure 3. The upper looper roller 21 is responsible for the bending and lifting operations of the strip; the lower looper roller 22 is used to convey the head of the strip and assist in threading when the looper roller is in a high position; this double-layer design not only optimizes the spatial layout of the equipment, but also makes the path of the strip smoother and more stable during the cooling process. At the same time, the upper looper roller 21 and the lower looper roller 22 are coordinated with each other through a precise transmission and control system, realizing precise control of the strip position and ensuring the consistency and efficiency of the cooling effect.

[0068] (4) Closed-loop control of cooling water tank 1 temperature and inlet and outlet regulating valves:

[0069] In order to ensure the stability and cooling effect of the cooling water in the cooling water tank 1, the present invention adopts a closed-loop control method of the temperature of the cooling water tank 1 and the inlet regulating valve and the outlet regulating valve. This method monitors the temperature of the cooling water in real time by setting a temperature sensor in the cooling water tank 1, and transmits the temperature signal to the control unit. The control unit automatically calculates and adjusts the opening of the inlet regulating valve and the outlet regulating valve according to the preset temperature range and cooling requirements, thereby controlling the flow and temperature of the coolant. When the temperature of the cooling water tank 1 deviates from the set range, the control unit will respond quickly and adjust the opening of the inlet regulating valve and the outlet regulating valve to restore the water temperature to the normal range. This closed-loop control method ensures the stability of the cooling water temperature, improves the control accuracy and efficiency of the cooling process, and provides a reliable guarantee for the stable operation of the strip cooling process.

[0070] The use method of the strip steel online looper cooling device of the thin strip casting and rolling production line of the present invention:

[0071] like Figure 1 As shown, in the initial state, the top surface of each lower looper roller 22 and the top surface of each strip passing roller 31 are located at the same horizontal plane; the strip is transported to the lower looper roller 22 above the cooling water tank 1 and the strip passing roller 31 to complete the strip head transportation and auxiliary strip threading, and the control unit controls each double-layer looper roller group to descend, and the strip 4 is bent at a specific angle (the angle is determined by actual production) and then smoothly sent into the coolant 5 of the cooling water tank 1 (as shown in FIG. Figure 2 As shown in the figure, the steel strip 4 is in a continuous conveying operation state throughout the whole process; the control unit adjusts the opening of the inlet regulating valve and the outlet regulating valve of the cooling water tank 1 according to the temperature parameters transmitted by the temperature sensor set in the cooling water tank 1, and intelligently adjusts the temperature of the coolant in the cooling water tank 1. The steel strip 4 passing through the cooling water tank 1 is cooled to the set temperature; after the online cooling of the steel strip 4 is completed, the control unit controls each double-layer looper roller group to rise and leave the cooling water tank 1, and return to Figure 1 The initial state shown is in preparation for the next online cooling of a new strip.

[0072] As described above, the online looper cooling device for strip steel of the thin strip casting and rolling production line of the present invention and the use method thereof have the following beneficial effects:

[0073] The present invention constructs an efficient, precise and flexible strip cooling system, which integrates a cooling water trough, a double-layer looper roller structure and a strip passing roller structure. The cooling water trough takes into account the dual needs of water circulation and temperature control, and has the function of intelligently adjusting the cooling temperature; each double-layer looper roller group of the double-layer looper roller structure can be independently lifted and lowered, and the strip is bent at a specific angle and then smoothly sent into the cooling water trough, thereby improving the flexibility and adaptability of the system, optimizing the path and posture of the strip during the cooling process, and ensuring the consistency and efficiency of the cooling effect; the strip passing roller structure undertakes the tasks of conveying the strip head and assisting in strip threading, ensuring that the strip can transition smoothly and smoothly before entering the cooling zone, avoiding strip damage or blockage caused by improper operation, and improving the continuous operation capacity of the production line.

[0074] The present invention not only improves the automation level and control accuracy of the cooling process, ensures the stability and controllability of the cooling process, but also effectively reduces energy consumption, prolongs the service life of the steel strip, and provides strong support for improving production efficiency and product quality.

[0075] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An online looper cooling device for strip steel in a thin strip casting and rolling production line, characterized in that: include: A cooling water tank is arranged below the steel strip on the production line, the top of the cooling water tank is open, and a coolant for cooling the steel strip circulates in the cooling water tank; A double-layered looper roller structure is used to bend the steel strip at a set angle and then allow it to enter the cooling liquid in the cooling water tank; the double-layered looper roller structure comprises at least two groups of double-layered looper rollers that can be independently lifted and lowered through the opening, each of the double-layered looper rollers comprises an upper looper roller and a lower looper roller that are arranged opposite to each other and spaced apart, and a steel strip channel is formed between the upper looper roller and the lower looper roller of each double-layered looper roller group; The strip steel passing roller structure is used for conveying the strip steel head and assisting strip threading; the strip steel passing roller structure comprises at least three strip steel passing rollers arranged above the opening, each of the strip steel passing rollers and each of the double-layer looper roller groups are arranged crosswise along the running direction of the strip steel; after each of the double-layer looper roller groups is raised, the top surface of each of the lower looper rollers and the top surface of each of the strip steel passing rollers are located at the same horizontal plane; The control unit is used to control the temperature of the coolant in the cooling water tank and the working state of the double-layered looper roller structure.

2. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 1, characterized in that: A coolant inlet and a coolant outlet are respectively arranged on opposite sides of the cooling water trough along the running direction of the strip, an inlet regulating valve is arranged at the coolant inlet, and an outlet regulating valve is arranged at the coolant outlet. A temperature sensor is arranged in the cooling water trough, and the inlet regulating valve, the outlet regulating valve and the temperature sensor are electrically connected to the control unit. The control unit adjusts the opening of the inlet regulating valve and the outlet regulating valve according to the temperature parameter transmitted by the temperature sensor to intelligently adjust the temperature of the coolant in the cooling water trough.

3. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 2, characterized in that: The temperature sensor includes an inlet temperature sensor arranged at the coolant inlet and an outlet temperature sensor arranged at the coolant outlet.

4. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 2, characterized in that: The coolant inlet is arranged on the side of the cooling water trough located in the direction of the strip incoming, the coolant outlet is arranged on the side of the cooling water trough located in the direction of the strip out, and the coolant inlet is arranged higher than the coolant outlet.

5. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 2, characterized in that: The double-layered looper roller structure further includes a plurality of lifting structures corresponding to each of the double-layered looper roller groups, and the lifting structures are electrically connected to the control unit.

6. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 5, characterized in that: Each of the lifting structures is provided with a displacement sensor for real-time monitoring of the position of each of the double-layer looping roller groups, and each of the displacement sensors is electrically connected to the control unit.

7. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 5, characterized in that: The lifting structure is a cylinder structure or a hydraulic cylinder structure.

8. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 1, characterized in that: Strip guide rollers are respectively arranged at the top of both sides of the cooling water trough along the running direction of the strip steel, and the top surface of each of the strip guide rollers and the top surface of each of the strip steel passing rollers are located at the same horizontal plane.

9. The strip steel online looper cooling device for a thin strip casting and rolling production line according to claim 1, characterized in that: The roller diameters of the upper looper roller, the lower looper roller and the strip passing roller are arranged to be the same.

10. A method for using the strip steel online looper cooling device of a thin strip casting and rolling production line according to any one of claims 1 to 9, characterized in that: include: In the initial state, the top surface of the lower looper roller and the top surfaces of each strip passing roller are located at the same horizontal plane; the strip is transported to the lower looper roller above the cooling water trough and above the strip passing roller to complete the strip head transportation and auxiliary strip threading; the control unit controls the descent of each double-layer looper roller group, and the strip is bent at a specific angle and smoothly sent into the coolant in the cooling water trough, and the strip is in a continuous transportation operation state throughout the process; the control unit intelligently adjusts the temperature of the coolant in the cooling water trough according to the temperature parameters transmitted by the temperature sensor set in the cooling water trough, and the strip passing through the cooling water trough is cooled to the set temperature; after completing the online cooling of the strip, the control unit controls each double-layer looper roller group to rise and leave the cooling water trough to restore the initial state.

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