Strip cooling device and method

Abstract

The application discloses a strip cooling device and a cooling method, and belongs to the technical field of strip rolling. The strip cooling device can make the surface of the strip even, improve the performance of the strip, and improve the product quality. The strip cooling device comprises at least one set of liquid spraying assemblies and at least one set of air spraying assemblies arranged along the conveying direction of the strip. The liquid spraying assemblies are used for spraying liquid on the surface of the strip. The air spraying assemblies are used for spraying air on the surface of the strip. Along the conveying direction of the strip, at least one set of air spraying assemblies is arranged behind each set of liquid spraying assemblies. The air spraying assemblies are used for spraying air on the surface of the strip to form an air flow along the width direction of the strip on the surface of the strip, and drive the liquid to spread along the width direction, wherein the width direction intersects the conveying direction.

Description

Technical Field

[0001] This application belongs to the field of strip rolling technology, and particularly relates to a strip cooling device and cooling method. Background Technology

[0002] In hot-rolled strip steel production, laminar flow cooling systems control the strip temperature by adjusting the cooling water. However, uneven distribution of cooling water on the strip surface affects the consistency of cooling along the width direction. Therefore, side-spraying technology is widely used both domestically and internationally to attempt to improve the distribution of cooling water along the strip width.

[0003] However, side spraying makes it difficult to achieve uniform distribution of cooling water. Due to the spraying method and the shape of the strip, there are still significant differences in the cooling water distribution along the width. This problem is particularly prominent when the strip has shape defects such as waviness, further exacerbating the uneven cooling and ultimately leading to uneven strip microstructure and properties, thus affecting product quality. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a cooling device and method for sheet and strip materials, which enables uniform cooling of the sheet and strip surface, thereby improving the microstructure and properties of the sheet and strip and enhancing product quality.

[0005] The first aspect of this application provides a sheet / strip cooling device, comprising: At least one set of liquid spraying assembly and at least one set of air spraying assembly are arranged along the conveying direction of the strip; The spraying assembly is used to spray liquid onto the surface of the strip; the jetting assembly is used to jet air onto the surface of the strip. Along the conveying direction of the strip material, at least one set of the jetting assembly is provided behind each set of the liquid spraying assembly; The jetting assembly is used to inject gas onto the surface of the strip to form an airflow along the width direction of the strip, driving the liquid to spread along the width direction, wherein the width direction intersects the conveying direction. In some embodiments, the jet assembly includes a bracket, a nozzle, and a position adjustment component; the nozzle is fixed to the bracket by the position adjustment component; the nozzle is provided with a plurality of nozzles spaced apart along the extension direction of the nozzle, and the jetting direction of the nozzles is toward the surface of the strip material. The position adjustment component is used to drive the nozzle to switch between a first state and a second state; When the nozzle is in the first state, the extension direction of the nozzle is not parallel to the width direction; When the nozzle is in the second state, the extension direction of the nozzle is parallel to the width direction.

[0006] In some embodiments, the position adjusting member includes a connecting tube and a rotating mechanism; The connecting pipe has a hollow structure, forming a gas channel; one end of the gas channel is used to connect to the gas supply equipment, and the other end of the gas channel is connected to the nozzle; The rotating mechanism is connected to the bracket; the connecting pipe is also used to drive the nozzle to rotate under the drive of the rotating mechanism, so that the nozzle switches between the first state and the second state.

[0007] In some embodiments, a pressure regulating valve is provided between the gas supply device and the connecting pipe, and the pressure regulating valve is used to regulate the gas supply pressure.

[0008] In some embodiments, the jet assembly further includes an angle adjustment element, through which the nozzle is connected to the position adjustment element; The angle adjustment component is used to drive the nozzle to rotate about the nozzle axis.

[0009] In some embodiments, the strip cooling device further includes a controller, and the angle adjustment member is electrically connected to the controller; The controller is used to control the angle adjustment component to adjust the angle between the nozzle's spray direction and the conveying direction based on the thickness of the strip.

[0010] In some embodiments, the angle between the spray direction of the nozzle and the conveying direction is an acute angle, which increases with the increase of the thickness of the strip.

[0011] In some embodiments, the jet assembly further includes a position limiting member disposed on the bracket and connected to the position adjusting member, for limiting the movement of the position adjusting member after the nozzle is switched to the target state, so as to keep the nozzle in the current state.

[0012] In some embodiments, the position limiting element is a lock nut, an electromagnetic lock, or a pneumatic lock.

[0013] A second aspect of this application provides a method for cooling sheet and strip, applied to the sheet and strip cooling apparatus provided in the first aspect, comprising: Along the conveying direction of the strip, liquid is sprayed onto the surface of the strip by at least one set of spraying assemblies. At the same time, behind each set of spraying assemblies, at least one set of jetting assemblies jets liquid onto the surface of the strip, so that the liquid on the surface of the strip spreads along the width direction of the strip.

[0014] This application employs a liquid spraying assembly and an air jetting assembly arranged along the conveying direction of the strip and sheet material, with at least one air jetting assembly positioned behind each liquid spraying assembly. Simultaneously, the air jetting assemblies spray gas onto the surface of the strip and sheet material, thereby creating an airflow along the width direction. This airflow actively drives the liquid applied to the strip and sheet surface by the liquid spraying assembly to spread along the width direction. On one hand, it compensates for the initial uneven liquid distribution caused by the limitations of the spraying method through forced convection. On the other hand, for strip and sheet material defects such as waviness, the airflow can dynamically adjust the liquid flow path according to the surface morphology, effectively overcoming the phenomenon of liquid accumulation or loss at defective areas due to geometric undulations. This achieves uniform liquid coverage in the width direction, significantly improving the cooling uniformity of the strip and sheet material in the width direction, ultimately ensuring the uniformity of the strip and sheet material's microstructure and properties, and improving product quality. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic side view of the strip material during the conveying process; Figure 2 This is a schematic application scenario diagram of the strip cooling device provided in one or more embodiments of this application; Figure 3 This is a schematic side view of the liquid spraying direction and air jet direction provided in one or more embodiments of this application; Figure 4 This is a schematic top view of the liquid spraying direction of the jet assembly provided in one or more embodiments of this application; Figure 5 This is another illustrative application scenario of a strip cooling device provided in one or more embodiments of this application; Figure 6 This is a schematic flowchart of a strip cooling method provided in one or more embodiments of this application. Detailed Implementation

[0016] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0017] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the requirement defined by the phrase "comprising one..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0018] Side spraying makes it difficult to achieve uniform distribution of cooling water. Due to the spraying method and the strip shape, there are still significant differences in cooling water distribution along the width direction. This problem is particularly pronounced when the strip has shape defects such as waviness, further exacerbating uneven cooling and ultimately leading to uneven strip microstructure and properties, affecting product quality. Figure 1 In the recessed strip M shown, coolant N tends to accumulate in the recessed area (Y direction is the width direction of the strip), while there is no coolant in other areas. If a side spraying device W is used for side spraying, the coolant on the surface of the strip will still be uneven, which will still lead to uneven cooling of the strip and consequently uneven microstructure properties.

[0019] In view of this, this application proposes a cooling device and cooling method for sheet and strip materials, which can make the surface of the sheet and strip material cool evenly, thereby improving the microstructure and properties of the sheet and strip material and enhancing product quality.

[0020] like Figure 2 As shown, a first aspect of this application provides a strip cooling device for cooling strips along the conveying direction ( Figure 2 The strip material M moving in the X direction is cooled. The strip material cooling device includes at least one set of liquid spraying assembly 100 and at least one set of jet spraying assembly 200 arranged along the strip material conveying direction X.

[0021] Specifically, the liquid spraying assembly 100 is used to spray a cooling liquid, such as cooling water or cooling oil, onto the surface of the strip M to achieve forced cooling of the strip M. The jetting assembly 200 is used to spray a gas, such as compressed air or inert gas, onto the surface of the strip M to regulate the distribution of the cooling liquid on the surface of the strip M.

[0022] In the conveying direction X, at least one jet assembly 200 is provided behind each set of liquid spraying assemblies 100. That is, the strip M first passes through the area of ​​the liquid spraying assembly 100 for liquid spraying and cooling, and then passes through the area of ​​the jet assembly 200 for airflow regulation. This arrangement of liquid spraying followed by jetting ensures that the cooling liquid can be regulated in time before serious segregation occurs due to factors such as gravity, strip shape, or uneven spraying.

[0023] like Figure 3 and Figure 4 As shown, the jet assembly 200 can form an airflow along the width direction of the strip M on its surface. The width direction Y intersects the conveying direction X, and the width direction Y can be a horizontal direction perpendicular to the conveying direction X. Alternatively, the width direction Y can be non-perpendicular to the conveying direction X.

[0024] The nozzle 201 sprays gas in the direction Z2 toward the surface of the strip M, and its spray direction forms a certain angle with the normal direction of the strip M surface, so that the gas sprayed from the nozzle forms an airflow along the width direction on the strip M surface. This airflow forms an air curtain or air knife on the strip M surface, generating a driving force on the cooling liquid along the width direction, thereby driving the liquid to spread along the width direction.

[0025] When the strip cooling device is operating, the strip M moves along the conveying direction X, first passing through the area of ​​the spray assembly 100, where the spray assembly 100 sprays cooling liquid onto the surface of the strip M, initiating cooling. Subsequently, the strip M enters the area of ​​the jet assembly 200, where the jet assembly 200 sprays gas onto the surface of the strip M, forming an airflow along the width direction. This airflow exerts a thrust along the width direction on the cooling liquid, redistributing the cooling liquid, which was originally unevenly distributed in the width direction due to uneven spraying or strip shape, spreading it to areas with less liquid, thereby achieving uniform coverage of the cooling liquid in the width direction.

[0026] With the above structure, this embodiment not only achieves basic cooling of the strip M through the spray component 100, but also actively intervenes in the distribution of the cooling liquid through the airflow in the width direction formed by the jet component 200. This effectively overcomes the problem of uneven cooling caused by the limitations of the side spray method and the defects in the strip shape, significantly improves the cooling uniformity in the width direction of the strip, thereby ensuring the consistency of the strip's microstructure and properties and improving product quality.

[0027] It should be noted that the spray assembly 100 can be a laminar flow manifold. The spray direction Z1 of the laminar flow manifold can be perpendicular to the surface of the strip M or not. As long as the spray landing point of the jet assembly 200 on the surface of the strip M is behind the spray landing point of the spray assembly 100 (this is because the strip is in a conveying state, so that the jet pressure of the jet assembly 200 can be applied to the coolant on the surface of the strip).

[0028] Furthermore, the strip cooling device of this application is not limited to only including one set of liquid spraying assembly 100 and one set of jet spraying assembly 200. In practical applications, depending on the thickness, width, running speed of the strip, and cooling process requirements, the cooling device may include multiple sets of liquid spraying assembly 100 and multiple sets of jet spraying assembly 200 arranged along the strip conveying direction. For example, a first liquid spraying assembly, a first jet spraying assembly, a second liquid spraying assembly, a second jet spraying assembly, and so on, can be sequentially arranged in the conveying direction to form a multi-stage cooling and control composite structure.

[0029] Furthermore, behind each group of spraying components 100, either only one group of jetting components 200 can be installed, or multiple groups of jetting components 200 can be installed simultaneously. When multiple groups of jetting components 200 are installed behind each spraying component 100, these jetting components 200 can be arranged sequentially along the conveying direction, acting together on the surface of the strip material behind the same spraying area. Multiple groups of jetting components 200 can use the same or different jetting parameters (such as air pressure, spray angle, nozzle arrangement density, etc.) to achieve graded and gradual spread control of the cooling liquid, further improving the uniformity of the liquid in the width direction.

[0030] Furthermore, the number of jetting components 200 following different spraying components 100 can be the same or different. For example, for the first set of spraying components 100 near the strip inlet, two sets of jetting components 200 can be set behind it for rapid initial spreading; for subsequent spraying components 100, one set of jetting components 200 can be set behind them to maintain uniform distribution. This flexible configuration allows the cooling device to adapt to more complex cooling process requirements, and is especially suitable for production scenarios of sheet and strip materials such as thick plates and high-strength steel, where high cooling uniformity is required.

[0031] By flexibly combining and arranging the above-mentioned multiple sets of liquid spraying components 100 and multiple sets of jet spraying components 200, the present invention can further enhance the active spreading effect of liquid along the width direction while ensuring cooling efficiency, and significantly improve the cooling uniformity of the strip in the width direction.

[0032] In some embodiments, such as Figure 2 As shown, the jet assembly 200 includes a bracket 210, a nozzle 220, and a position adjustment component 230. The nozzle 220 is fixed to the bracket 210 by the position adjustment component 230. The nozzle 220 is provided with a plurality of nozzles 2201 arranged at intervals along the extension direction of the nozzle 220. The jetting direction of the nozzles 2201 is towards the surface of the strip.

[0033] The position adjustment component 230 is used to drive the nozzle 220 to switch between a first state and a second state. Specifically, as follows: Figure 5As shown, when the nozzle 220 is in the first state, the extension direction of the nozzle 220 is not parallel to the width direction Y; as Figure 2 As shown, when the nozzle 220 is in the second state, the extension direction of the nozzle 220 is parallel to the width direction Y.

[0034] In the second state, since the extension direction of the nozzle 220 is parallel to the width direction, the multiple nozzles 2201 disposed on the nozzle 220 are arranged at intervals along the width direction Y of the strip. The gas ejected by each nozzle 2201 can form an airflow along the width direction on the surface of the strip, thereby driving the cooling liquid to spread evenly along the width direction. This state is the working state of the jet assembly and is suitable for actively controlling the liquid distribution during the normal cooling process of the strip.

[0035] In the first state, the extension direction of the nozzle 220 is not parallel to the width direction Y. For example, it can be rotated to be approximately parallel to the conveying direction X or at an angle. In this state, the nozzle 220 and the nozzle 2201 are deviated from the width direction Y, which helps to prevent the nozzle 220 assembly from interfering with the strip or operators during equipment maintenance, tape threading operations, or troubleshooting. It also helps to reduce airflow interference in non-operating states. This state is the non-operating or maintenance state.

[0036] In some embodiments, such as Figure 2 As shown, the position adjustment component 230 includes a connecting pipe 2301 and a rotating mechanism 2302.

[0037] The connecting pipe 2301 has a hollow structure, forming a gas passage. One end of the gas passage is used to connect to a gas supply device (not shown in the figure), such as a compressed air station or air pump, and the other end of the gas passage is connected to the nozzle 220. With this structure, the connecting pipe 2301 not only acts as a transmission component to drive the nozzle 220 to rotate, but also undertakes the function of gas delivery, realizing an integrated design of transmission and gas supply, thereby simplifying the device structure.

[0038] The rotating mechanism 2302 is connected to the bracket 210. The connecting pipe 2301 is also used to drive the nozzle 220 to rotate under the drive of the rotating mechanism 2302, so that the nozzle 220 switches between a first state and a second state. Specifically, the rotating mechanism 2302 may include a drive motor, a rotary cylinder, or a manual wheel, etc., and its output end is fixedly connected to the connecting pipe 2301 or driven by a coupling. Figure 2 The connecting pipe 2301 runs through the entire rotating mechanism 2302, meaning that the rotating mechanism 2302 directly drives the connecting pipe 2301 to rotate. When the rotating mechanism 2302 is activated, it drives the connecting pipe 2301 to rotate around its axis, and the connecting pipe 2301 in turn drives the nozzle 220, which is fixedly connected to it, to rotate synchronously, thereby realizing the angle switching of the extension direction of the nozzle 220 relative to the width direction Y.

[0039] In a preferred embodiment, the connecting pipe 2301 and the nozzle 220 can be detachably connected via a flange, thread, or quick-connect fitting, facilitating the installation, replacement, and maintenance of the nozzle 220. A bearing seat can be provided between the connecting pipe 2301 and the bracket 210 to support the connecting pipe and ensure its smooth rotation.

[0040] With the above structure, the position adjustment component 230 can switch the state of the nozzle 220 at the same time, and the hollow structure of the connecting pipe 2301 can also serve as a gas passage. There is no need to set up an additional independent gas supply pipeline and dynamic sealing structure between the rotating parts, thereby reducing the number of parts, reducing manufacturing costs and failure rate, and improving the integration and operational reliability of the device.

[0041] In some embodiments, a pressure regulating valve (not shown in the figure) may be provided between the gas supply device and the connecting pipe 2301. The pressure regulating valve is used to regulate the gas supply pressure.

[0042] Specifically, the pressure regulating valve can be a manual, electric, or pneumatic regulating valve, with its inlet end connected to the gas supply equipment and its outlet end connected to the gas passage of the connecting pipe 2301. By adjusting the opening of the pressure regulating valve, the gas pressure entering the nozzle can be controlled, thereby adjusting the gas flow rate and impact force ejected from the nozzle.

[0043] In practical applications, the air supply pressure can be adjusted in real time using a pressure regulating valve based on the thickness, width, conveying speed of the strip, and the type and flow rate of the cooling liquid. When the strip has a good shape and the cooling liquid distribution is relatively uniform, the air supply pressure can be appropriately reduced to save energy. When the strip has obvious defects such as waviness or the cooling liquid distribution is severely uneven, the air supply pressure can be appropriately increased to enhance the driving force of the airflow on the liquid and ensure that the liquid is fully spread along the width direction.

[0044] In addition, the pressure regulating valve can be linked with the control system to automatically adjust the air supply pressure according to the process parameters of the strip, thereby realizing intelligent control of the cooling process.

[0045] By setting a pressure regulating valve, this embodiment can flexibly adjust the output parameters of the jet assembly according to the actual working conditions, while ensuring the uniform distribution of cooling liquid, optimizing energy consumption, and improving the process adaptability and control accuracy of the device.

[0046] In some embodiments, such as Figure 2 As shown, the jet assembly 200 also includes an angle adjustment member 240, through which the nozzle 220 is connected to the position adjustment member 230. The angle adjustment member 240 is used to drive the nozzle to rotate about the nozzle axis.

[0047] Specifically, the angle adjustment component 240 may include a rotary drive mechanism, such as a micro motor, a rotary cylinder, or a manual adjustment knob, the output end of which is fixedly connected to one end of the nozzle 220. When the angle adjustment component 240 is activated, it drives the nozzle 220 to rotate around its own axis, thereby changing the angle between the spray direction of the nozzle 2201 provided on the nozzle 220 and the sheet / strip conveying direction X.

[0048] By setting the angle adjustment component 240, this embodiment can further independently adjust the nozzle's spray angle when the nozzle is in the second state (i.e., the nozzle extension direction is parallel to the width direction).

[0049] Because strip steel of different thicknesses, strengths, and processes forms water films of varying thicknesses on its surface during cooling, a jetting direction perpendicular to the strip steel surface cannot effectively break the water film to achieve water sealing. Therefore, in this embodiment, the jetting assembly 200 is arranged at an angle relative to the strip steel surface, forming an acute angle between its jetting direction and the normal to the strip steel surface. An angle adjustment component 240 and a control unit are also included. The control unit receives information on the strip steel's thickness, strength grade, process parameters, and surface temperature. Based on a preset model, it estimates the current water film thickness and calculates the optimal jetting angle to break the water film. Subsequently, the control unit drives the angle adjustment component 249 to change the actual tilt angle of the jetting assembly 200, causing the ejected airflow to impact the water film obliquely in a non-perpendicular direction. The wedging and shearing action of the airflow tears the water film, achieving reliable sealing. When production switches to strip steel of different specifications, the control unit automatically recalculates and adjusts the jetting angle without manual intervention.

[0050] This allows operators or control systems to flexibly adjust the impact direction and action mode of airflow on the surface of the strip according to the specifications, shape, and cooling process requirements of the strip, thereby optimizing the driving force distribution of the cooling liquid and enhancing the process adaptability of the device.

[0051] The strip cooling device may also include a controller, with the angle adjustment element 240 electrically connected to the controller. The controller is used to adjust the angle adjustment element 240 to adjust the angle between the spray direction of the nozzle 2201 and the conveying direction based on the thickness of the strip.

[0052] Specifically, the controller can be a programmable logic controller (PLC), a microcontroller, or an industrial computer. The controller is connected to the angle adjustment component 240 via a control circuit. Based on a preset control strategy or the real-time detected strip thickness parameters, the controller can send control commands to the angle adjustment component to drive the nozzle to rotate to the target angle.

[0053] In a preferred embodiment, the strip cooling device may further include a thickness detection device, such as a laser thickness gauge or a X-ray thickness gauge, positioned before the spraying assembly to detect the thickness of the strip in real time and transmit the thickness signal to the controller. Based on the received thickness signal, the controller automatically calculates and outputs the corresponding angle control value according to a preset mapping relationship or control algorithm, thereby achieving dynamic adjustment of the nozzle spray direction.

[0054] By introducing a controller, this embodiment achieves automated adjustment of the nozzle spray angle without manual intervention, improving the response speed and accuracy of the adjustment. At the same time, it ensures that the best liquid spreading effect can be obtained under different sheet and strip thickness specifications, further improving cooling uniformity and product quality stability.

[0055] In some embodiments, the angle between the nozzle's spray direction and the conveying direction is an acute angle, which increases with the increase of the sheet / strip thickness.

[0056] Specifically, when the thickness of the strip is small, such as less than 1 mm, the controller adjusts the angle between the nozzle 2201 and the conveying direction to a smaller angle, such as 15° to 30°. At this time, the airflow direction is closer to being perpendicular to the strip surface or along the width direction, which can generate a moderate driving force for the cooling liquid on the surface of the thinner strip, avoiding excessive liquid splashing or strip vibration due to excessive airflow.

[0057] When the sheet / strip material is thick, for example, more than 5 mm, the controller adjusts the included angle to a larger angle, such as 60° to 75°. At this time, the airflow direction is closer to the component along the conveying direction, which increases and forms a longer airflow path. This provides a stronger and more continuous driving force for the cooling liquid on the surface of the thicker sheet / strip material, ensuring that the cooling liquid is fully spread in the width direction and overcoming the problem of uneven distribution caused by the large heat capacity and easy accumulation of cooling water in thick plates.

[0058] By establishing a positive correlation between the included angle and the thickness of the strip / plate, this embodiment achieves optimized matching between the nozzle spray direction and the strip / plate specifications. This control strategy fully considers the heat transfer characteristics and liquid flow characteristics of strips / plates of different thicknesses during the cooling process. While ensuring cooling uniformity, it also takes into account energy consumption control and process stability, demonstrating the significant advantages of the device in intelligent control.

[0059] In some embodiments, such as Figure 2 As shown, the jet assembly 200 also includes a position limiter 250, which is disposed on the bracket 210 and connected to the position adjuster 230. The position limiter 250 is used to limit the movement of the position adjuster 250 after the nozzle 220 is switched to the target state, so that the nozzle 220 remains in the current state.

[0060] Specifically, the position limiting member 250 can be disposed between the bracket 210 and the position adjusting member 230, or between the moving part and the fixed part of the position adjusting member 230. When the position adjusting member 230 drives the nozzle 220 to switch to the first state or the second state, the position limiting member 250 is activated to apply a locking force or form a mechanical block on the moving part of the position adjusting member 230, preventing it from undergoing unexpected rotation or displacement due to vibration, gravity or accidental external force, thereby stably maintaining the nozzle 220 in the current state.

[0061] When the jet assembly 200200 is in the second state (the extension direction of the nozzle 220220 is parallel to the width direction Y), the position limiter 250 can ensure that the multiple nozzles 2201 maintain an accurate jet direction during long-term operation, avoid the nozzle 220 from deflecting due to equipment vibration, thereby ensuring that the airflow continuously and stably forms a driving force along the width direction on the surface of the strip, and ensuring the uniformity and consistency of the cooling liquid spread.

[0062] When the jet assembly 200 is in the first state (the extension direction of the nozzle 220 is not parallel to the width direction), the position limiter 250 can reliably lock the nozzle 220 in the maintenance or threading position, preventing the nozzle 220 from accidentally rotating and interfering with the strip or operator, thus significantly improving the safety of equipment maintenance and operation.

[0063] In a preferred embodiment, the position limiting member 250 can be electrically connected to the controller to achieve automatic locking and unlocking. When the position adjusting member 230 completes a state switch, the controller sends a locking signal to the position limiting member 250, and the position limiting member 250 automatically locks. When it is necessary to switch states again, the controller first sends an unlocking signal and then activates the position adjusting member 230. This linkage control further improves the automation level and operational reliability of the device.

[0064] By setting the position limiting component 250, this embodiment adds a state holding function on the basis of realizing the state switching of the nozzle 220, effectively avoiding the unexpected displacement of the nozzle 220 caused by vibration or external force, ensuring the stability and safety of the jet assembly 200 in working and non-working states, and further improving the operational reliability and service life of the device.

[0065] In some embodiments, the position limiting element 250 may be a lock nut, an electromagnetic lock, or a pneumatic lock.

[0066] In one specific implementation, the position limiting component 250 is a locking nut. In this structure, the rotating shaft of the position adjusting component 230 has an external thread, which the locking nut engages with. When the nozzle 220 is switched to the target state, the locking nut is tightened to press against the end face of the bracket or rotating mechanism. The self-locking characteristic of the threaded connection restricts the rotating shaft from continuing to rotate, thus achieving mechanical locking. This structure is simple, low-cost, and suitable for scenarios requiring manual adjustment or where frequent switching is not necessary.

[0067] In another specific implementation, the position limiting component 250 is an electromagnetic lock. The electromagnetic lock includes an electromagnet and a locking pin. The electromagnet is fixed to a bracket, and the locking pin is retractably disposed within the electromagnet. When the nozzle 220 switches to the target state, the controller energizes the electromagnetic lock, and the electromagnet generates magnetic force to drive the locking pin to extend and insert into the corresponding locking hole or groove on the moving part of the position adjusting component 230, achieving rapid and reliable automatic locking. This structure has a fast response speed and is suitable for applications with a high degree of automation.

[0068] In practical applications, any of the above-mentioned position limiting components 250 can be flexibly selected according to the usage frequency, load size, degree of automation and cost requirements of the device, or multiple locking methods can be combined according to actual needs to achieve the best locking effect.

[0069] Through the above structure, this embodiment provides a variety of specific implementation methods for selection, which not only meets the locking requirements under different working conditions, but also reflects the diversity and adaptability of the device structure, further expanding the application scope of the product.

[0070] A second aspect of this application provides a method for cooling sheet and strip materials, applied to the sheet and strip cooling apparatus provided in the first aspect embodiment, such as... Figure 6 As shown, the strip cooling method includes the following steps: Step S101: Along the conveying direction of the strip, liquid is continuously sprayed onto the surface of the strip by at least one set of spraying components 100.

[0071] In step S102, while the spraying assembly 100 is continuously spraying liquid, at least one jetting assembly 200 is continuously spraying liquid onto the surface of the strip behind each set of spraying assemblies 100, so that the liquid on the surface of the strip is spread along the width direction of the strip.

[0072] Specifically, the strip material moves continuously along the conveying direction. The spray assembly 100200 continuously sprays cooling liquid, such as cooling water or cooling oil, onto the surface of the strip material to force cooling. Simultaneously, the jet assembly 200, located behind the spray assembly 100, continuously sprays gas, such as compressed air, onto the surface of the strip material, forming an airflow along the width direction on the strip material surface, driving the cooling liquid to spread evenly along the width direction.

[0073] Since both liquid spraying and air spraying are continuous, during the continuous movement of the strip, any area on its surface first undergoes liquid application through the liquid spraying component 100 area, and then enters the air spraying component 200 area to receive airflow control. The entire production line always maintains parallel operation of liquid spraying and air spraying, thereby ensuring cooling efficiency while achieving dynamic and uniform distribution of liquid in the width direction.

[0074] In a preferred embodiment of this method, during normal cooling, the nozzle 220 is switched to a second state via the position adjustment component 230, where the extension direction of the nozzle 220 is parallel to the width direction. In this state, multiple nozzles 2201 on the nozzle 220 are spaced apart along the width direction, forming an airflow field covering the entire width of the strip, ensuring uniform liquid spread along the width direction. During equipment maintenance or strip threading operations, the nozzle 220 is switched to a first state via the position adjustment component 230, where the extension direction of the nozzle 220 is not parallel to the width direction, causing the nozzle 220 and nozzles 2201 to deviate from the working area for easier operation. While liquid spraying continues, the jet assembly 200 switches to the appropriate state according to the actual operating conditions and continues to operate.

[0075] Through the above method, this invention continuously sprays gas onto the surface of the strip and sheet material while the liquid spraying assembly 100 is continuously spraying. This creates an airflow along the width of the strip and sheet material, actively driving the cooling liquid to spread along the width direction. This method effectively overcomes the problem of uneven cooling liquid distribution caused by the limitations of side spraying and strip and sheet shape defects, achieving uniform cooling of the strip and sheet material along its width. This ensures the consistency of the strip and sheet material's microstructure and properties, significantly improving product quality. Furthermore, by comprehensively utilizing multiple control methods such as pressure adjustment, angle adjustment, state switching, and position locking, and with all these adjustments completed during the continuous liquid spraying and air spraying process, this method possesses good process adaptability, operational flexibility, and production continuity, meeting the cooling requirements of strip and sheet materials of different specifications and under different working conditions.

[0076] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0078] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0079] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A sheet / strip cooling device, characterized in that, include: At least one set of liquid spraying assembly and at least one set of air spraying assembly are arranged along the conveying direction of the strip; The spraying assembly is used to spray liquid onto the surface of the sheet or strip. The jetting assembly is used to jet air onto the surface of the sheet or strip. Along the conveying direction of the strip material, at least one set of the jetting assembly is provided behind each set of the liquid spraying assembly; The jetting assembly is used to inject gas onto the surface of the strip to form an airflow along the width direction of the strip, driving the liquid to spread along the width direction, wherein the width direction intersects the conveying direction.

2. The strip cooling device according to claim 1, characterized in that, The jet assembly includes a bracket, a nozzle, and a position adjustment component; the nozzle is fixed to the bracket by the position adjustment component; the nozzle is provided with a plurality of nozzles arranged at intervals along the extension direction of the nozzle, and the jetting direction of the nozzles is towards the surface of the strip material. The position adjustment component is used to drive the nozzle to switch between a first state and a second state; When the nozzle is in the first state, the extension direction of the nozzle is not parallel to the width direction; When the nozzle is in the second state, the extension direction of the nozzle is parallel to the width direction.

3. The strip cooling device according to claim 2, characterized in that, The position adjustment component includes a connecting pipe and a rotating mechanism; The connecting pipe has a hollow structure, forming a gas channel; one end of the gas channel is used to connect to the gas supply equipment, and the other end of the gas channel is connected to the nozzle; The rotating mechanism is connected to the bracket; the connecting pipe is also used to drive the nozzle to rotate under the drive of the rotating mechanism, so that the nozzle switches between the first state and the second state.

4. The strip cooling device according to claim 3, characterized in that, A pressure regulating valve is provided between the gas supply device and the connecting pipe, and the pressure regulating valve is used to regulate the gas supply pressure.

5. The strip cooling device according to claim 2, characterized in that, The jet assembly also includes an angle adjustment component, and the nozzle is connected to the position adjustment component via the angle adjustment component; The angle adjustment component is used to drive the nozzle to rotate about the nozzle axis.

6. The strip cooling device according to claim 5, characterized in that, The strip cooling device also includes a controller, and the angle adjustment component is electrically connected to the controller. The controller is used to control the angle adjustment component to adjust the angle between the nozzle's spray direction and the conveying direction based on the thickness of the strip.

7. The strip cooling device according to claim 6, characterized in that, The angle between the spray direction of the nozzle and the conveying direction is an acute angle, which increases with the increase of the thickness of the strip.

8. The strip cooling device according to any one of claims 2 to 7, characterized in that, The jet assembly also includes a position limiting member disposed on the bracket and connected to the position adjusting member, which is used to limit the movement of the position adjusting member after the nozzle is switched to the target state, so that the nozzle remains in the current state.

9. The strip cooling device according to claim 8, characterized in that, The position limiting component is a locking nut, an electromagnetic lock, or a pneumatic lock.

10. A method for cooling sheet and strip materials, characterized in that, The sheet / strip cooling apparatus according to any one of claims 1 to 9 comprises: Along the conveying direction of the strip, liquid is continuously sprayed onto the surface of the strip through at least one set of spraying components; While the spraying assembly continuously sprays liquid, at least one jetting assembly continuously sprays liquid onto the surface of the strip behind each spraying assembly, causing the liquid on the surface of the strip to spread along the width direction of the strip.

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