A cooling protection system for hot rolling rolls

Abstract

The utility model discloses a cooling protection system for hot rolling roller, including supplementary pipeline, first control valve, flowmeter and controller, through parallelly arranged supplementary pipeline on the cooling main pipeline, and the collocation first control valve, flowmeter and controller have constructed the real -time response flow compensation mechanism, when the cooling main pipeline is caused water flow too low because of the tap valve failure, and flowmeter detects the flow in the cooling main pipeline to drop to critical value, and flowmeter will flow information transmission to controller, and controller will drive the first control valve on supplementary pipeline to adjust to target opening after quick processing, make the cooling water in supplementary pipeline confluence main pipeline, and the original cooling water of main pipeline confluence, directly promote total flow, effectively solved the sudden stop rolling problem of the rolling process because of water flow too low, even if the tap valve appears the failure, can guarantee that the roller is cooled enough, improves the stability of equipment operation, reduces the economic loss because of equipment failure.

Description

Technical Field

[0001] This application relates to the field of hot rolling roll cooling technology, and in particular to a cooling protection system for hot rolling rolls. Background Technology

[0002] In the hot rolling process, the stable operation of the roll cooling system has a crucial impact on product quality control, production equipment safety, and process continuity. Specifically, the cooling water flow rate of the finishing mill needs to be dynamically adjusted in real time according to the rolling conditions. Water valves operate frequently, and the sufficiency of the cooling water flow rate directly affects the roll cooling effect. Insufficient flow rate leads to inadequate roll cooling, which can easily cause serious product quality problems (such as abnormal workpiece performance) or equipment safety accidents (such as roll damage). Therefore, ensuring the basic flow rate of cooling water throughout the rolling process is a core element of process control.

[0003] To avoid serious accidents such as roll breakage due to concentrated thermal stress, existing technologies typically employ a protection mechanism: when the roll cooling water flow rate is less than 30% of the total flow rate, the mill protection system will trigger a final rolling command, forcing the mill to stop rolling, thereby reducing damage to the rolls caused by thermal stress overload.

[0004] However, during the rolling process, insufficient cooling water flow and unplanned sudden shutdown can cause significant impact loads on the equipment structure and roll bodies, increasing the risk of equipment damage. When the total cooling water flow is too low, the system lacks a rapid cooling emergency function, causing the rolls and bearing housings to be continuously affected by thermal expansion at high temperatures, which can easily lead to jamming. This not only makes roll replacement difficult but can also directly cause roll breakage in severe cases. In addition, using a flow rate of less than 30% as the shutdown threshold will force the production process to be interrupted, generating a large amount of scrap steel, resulting in significant economic losses. Utility Model Content

[0005] In view of the deficiencies in the prior art, this application provides a cooling protection system for hot rolling rolls to solve the problems of low reliability and reduced production efficiency of the protection methods in the prior art.

[0006] The above-mentioned objectives of this application are mainly achieved through the following technical solutions: A cooling protection system for hot rolling rolls, the cooling protection system comprising: A supplementary pipeline, with both ends connected to the main cooling pipeline, is configured to be connected in parallel with a stopcock valve and can guide the flow of cooling water in the main cooling pipeline. The first control valve is located on the replenishment pipeline; Flow meters are used to be installed on the main cooling pipe; The controller is connected to the first control valve and the flow meter respectively. The controller can receive and process the flow information obtained by the flow meter and control the first control valve to adjust to the target opening degree.

[0007] In an optional implementation, a second control valve is provided on the supplementary pipeline.

[0008] In an optional implementation, the second control valve is set to a normally open state.

[0009] In an optional implementation, the second control valve is configured as a manually rotary valve.

[0010] In an optional implementation, the inner diameter of the supplementary pipeline is not less than the inner diameter of the main cooling pipeline.

[0011] In an optional embodiment, the two ends of the supplementary pipeline are respectively located on the outer sides of the two ends of the plug valve.

[0012] In an optional implementation, the opening degree of the first control valve is not less than 30%.

[0013] In an optional implementation, the first control valve is configured as a pneumatic butterfly valve.

[0014] In an optional implementation, the first control valve is set to a normally closed state.

[0015] In an optional embodiment, the flow meter is installed on the cooling main pipe on the side of the supplementary pipeline facing the water inlet.

[0016] Compared with the prior art, the advantages of this application are: The cooling protection system in this application is used for cooling protection of hot rolling rolls. The cooling protection system includes a supplementary pipeline, a first control valve, a flow meter, and a controller. The two ends of the supplementary pipeline are connected to the main cooling pipeline, and the supplementary pipeline is set in parallel with the stopcock valve. The supplementary pipeline can guide the flow of cooling water in the main cooling pipeline. The first control valve is located on the supplementary pipeline. The flow meter is arranged on the main cooling pipeline. The controller is connected to the first control valve and the flow meter respectively. The controller can receive and process the flow information obtained by the flow meter and control the first control valve to adjust to the target opening degree.

[0017] This cooling protection system establishes a real-time flow compensation mechanism by setting up a supplementary pipeline in parallel with the main cooling pipeline, along with a first control valve, flow meter, and controller. When the water flow in the main cooling pipeline is too low due to a stopcock valve malfunction, the flow meter detects that the flow in the main cooling pipeline has dropped to a critical value (such as close to 30% of the total flow). The flow meter transmits the flow information to the controller, which processes it quickly and drives the first control valve on the supplementary pipeline to adjust to the target opening, allowing the cooling water in the supplementary pipeline to flow into the main pipeline and merge with the original cooling water in the main pipeline, directly increasing the total flow.

[0018] During this process, the total flow rate can be replenished in a timely manner through the supplementary pipeline, avoiding the situation where the cooling water flow rate is less than 30% of the total flow rate. This prevents the interlock protection final rolling command of the rolling mill from being triggered, effectively solving the problem of sudden rolling stop caused by excessively low water flow rate during the rolling process and reducing the impact of rolling stop on the equipment and roll body.

[0019] Even if the stopcock valve malfunctions, it ensures sufficient cooling of the rolls, preventing roll breakage due to insufficient cooling. Furthermore, ample cooling water promptly removes heat from the rolls and bearing housings, mitigating thermal expansion at high temperatures and resolving issues caused by stopcock valve malfunctions. This dynamic adjustment not only ensures the continuity of the rolling process but also significantly improves equipment operational stability and reduces economic losses caused by equipment failures.

[0020] Breaking away from the passive protection mode of existing technology that "stops rolling when the flow is insufficient", it instead achieves dynamic flow compensation through parallel supplementary pipelines. This not only does not affect the normal water supply of the original main pipeline, but also allows for rapid flow replenishment by adjusting the opening of the first control valve when the flow in the main pipeline is insufficient, ensuring that the total flow is maintained above the safe threshold. This eliminates the need to stop rolling due to insufficient flow, fundamentally reducing scrap steel generation and lowering economic losses. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the cooling protection system provided in the embodiments of this application; In the diagram: 100, supplementary pipeline; 200, first control valve; 300, second control valve; 400, flow meter; 501, plug valve; 502, cooling main pipeline. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the present invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0024] like Figure 1 As shown, Figure 1 A schematic diagram of a cooling protection system provided in an embodiment of this application; a cooling protection system for hot rolling rolls, the cooling protection system including a supplementary pipeline 100, a first control valve 200, a flow meter 400, and a controller, wherein: like Figure 1 As shown, the two ends of the supplementary pipe 100 are connected to the main cooling pipe 502, and the supplementary pipe 100 is configured in parallel with the plug valve 501, and the supplementary pipe 100 can guide the flow of cooling water in the main cooling pipe 502. The supplementary pipeline 100 serves as a flow compensation channel. Both ends of the supplementary pipeline 100 are connected to the main cooling pipeline 502 in a connected manner, and it forms a parallel relationship with the stopcock valve 501 on the main cooling pipeline 502. This allows the supplementary pipeline 100 to independently guide the cooling water in the main cooling pipeline 502 to form a diversion loop when the flow of the stopcock valve 501 is insufficient or malfunctions, thereby maintaining the stability of the total cooling water volume by supplementing the flow.

[0025] like Figure 1 As shown, the first control valve 200 is installed on the supplementary pipeline 100; the first control valve 200 has the characteristic of adjustable opening degree, which can accurately control the cooling water flow rate in the supplementary pipeline 100 according to actual needs, for example, adjusting to a small opening degree when the flow gap is small, and adjusting to a large opening degree when the flow gap is large, thereby realizing dynamic compensation of flow.

[0026] The flow meter 400 is installed on the main cooling pipe 502. The flow meter 400 can monitor the cooling water flow data in the main pipe in real time and continuously transmit these data to the controller in the form of electrical signals, etc., so as to provide accurate flow basis for system regulation.

[0027] The controller is connected to the first control valve 200 and the flow meter 400 respectively. The controller can receive and process the flow information obtained by the flow meter 400 and control the first control valve 200 to adjust to the target opening.

[0028] As a control unit, the controller establishes signal connections with the first control valve 200 and the flow meter 400 respectively. The controller can receive and process the real-time flow information transmitted by the flow meter 400. Through the built-in control algorithm, it compares and analyzes the current flow with the preset safe flow threshold. When it is determined that the flow in the main pipeline is lower than the safe threshold, it immediately sends an adjustment command to the first control valve 200 to control the first control valve 200 to adjust to the corresponding target opening degree, so as to ensure that the sum of the supplementary flow in the supplementary pipeline 100 and the remaining flow in the main pipeline reaches the flow standard required for safe operation.

[0029] like Figure 1 As shown, in an optional embodiment, the cooling protection system of this application is used for cooling protection of hot rolling rolls. The cooling protection system includes a supplementary pipeline 100, a first control valve 200, a flow meter 400, and a controller. The two ends of the supplementary pipeline 100 are connected to the main cooling pipeline 502, and the supplementary pipeline 100 is arranged in parallel with the stopcock valve 501. The supplementary pipeline 100 can guide the flow of cooling water in the main cooling pipeline 502. The first control valve 200 is located on the supplementary pipeline 100. The flow meter 400 is arranged on the main cooling pipeline 502. The controller is connected to the first control valve 200 and the flow meter 400 respectively. The controller can receive and process the flow information obtained by the flow meter 400 and control the first control valve 200 to adjust to the target opening.

[0030] The cooling protection system establishes a real-time flow compensation mechanism by setting up a supplementary pipeline 100 in parallel on the main cooling pipeline 502, and combining it with a first control valve 200, a flow meter 400, and a controller. When the water flow in the main cooling pipeline 502 is too low due to a malfunction of the stopcock valve 501, the flow meter 400 detects that the flow in the main cooling pipeline 502 has dropped to a critical value (such as close to 30% of the total flow). The flow meter 400 transmits the flow information to the controller. After rapid processing, the controller drives the first control valve 200 on the supplementary pipeline 100 to adjust to the target opening, so that the cooling water in the supplementary pipeline 100 merges into the main pipeline and combines with the original cooling water in the main pipeline, directly increasing the total flow.

[0031] During this process, the total flow rate can be replenished in time through the supplementary pipeline 100, avoiding the situation where the cooling water flow rate is less than 30% of the total flow rate. This prevents the interlock protection final rolling command of the rolling mill from being triggered, effectively solving the problem of sudden rolling stop caused by excessively low water flow rate during the rolling process and reducing the impact of rolling stop on the equipment and roll body.

[0032] Even if the stop valve 501 malfunctions, it ensures sufficient cooling of the rolls, preventing roll breakage due to insufficient cooling. Furthermore, ample cooling water promptly removes heat from the rolls and bearing housings, mitigating thermal expansion under high temperatures and resolving issues caused by the malfunction of the stop valve 501. This dynamic adjustment not only ensures the continuity of the rolling process but also significantly improves equipment operational stability and reduces economic losses caused by equipment failure.

[0033] Breaking away from the passive protection mode of existing technology that "stops rolling when the flow is insufficient", it instead achieves dynamic flow compensation through parallel supplementary pipeline 100. This not only does not affect the normal water supply of the original main pipeline, but also allows for rapid flow replenishment by adjusting the opening of the first control valve 200 when the flow in the main pipeline is insufficient, ensuring that the total flow is maintained above the safe threshold. This eliminates the need to stop rolling due to insufficient flow, fundamentally reducing scrap steel generation and lowering economic losses.

[0034] like Figure 1 As shown, in an optional embodiment, the supplementary pipeline 100 is provided with a second control valve 300. The second control valve 300 and the first control valve 200 form a dual control structure. When the first control valve 200 fails to adjust normally due to a malfunction, the second control valve 300 can intervene as a backup adjustment unit, supplementing the flow through independent control logic or manual operation, avoiding system regulation interruption caused by single valve failure, and further improving the reliability of flow compensation.

[0035] In an optional implementation, the second control valve 300 is set to a normally open state to ensure that the supplementary pipeline 100 remains open even in non-emergency situations. This will not hinder the dynamic adjustment of flow by the first control valve 200, and will reduce pipeline resistance when the first control valve 200 needs to be opened quickly, allowing the supplementary flow to enter the main pipeline rapidly. At the same time, it provides an additional safety redundancy for the system. Even if the first control valve 200 is accidentally closed, the normally open second control valve 300 can still ensure that there is a basic flow in the supplementary pipeline 100, reducing the risk of a sudden drop in flow.

[0036] like Figure 1 As shown, in an optional embodiment, the second control valve 300 is configured as a manual rotary valve. The manual rotary valve is simple and reliable to operate, suitable for manual intervention by operators when the automated control system malfunctions. By manually rotating the valve stem to change the opening, the supplementary flow can be flexibly adjusted. Especially in emergency situations, it can quickly achieve flow compensation, complementing the automatic control and enhancing the system's adaptability under complex operating conditions, thus avoiding protection failures caused by malfunctions of automated components.

[0037] In an optional embodiment, the inner diameter of the supplementary pipe 100 is not less than the inner diameter of the main cooling pipe 502. This dimensional relationship ensures that the supplementary pipe 100 has sufficient flow carrying capacity. When the flow rate of the main pipe drops significantly due to a malfunction of the stopcock valve 501, the supplementary pipe 100 can provide a supplementary potential of no less than the maximum flow rate of the main pipe, thereby quickly making up for the flow gap in extreme cases, avoiding the triggering of rolling stoppage due to insufficient supplementary capacity, and providing more adequate cooling protection for the rolls.

[0038] like Figure 1 As shown, in an optional embodiment, the two ends of the supplementary pipeline 100 are respectively located on the outer sides of the two ends of the plug valve 501, so that the supplementary pipeline 100 can completely bypass the plug valve 501 to form an independent circuit. When the plug valve 501 is blocked or jammed, the cooling water of the supplementary pipeline 100 can flow directly from the upstream to the downstream of the plug valve 501 without being affected by the state of the plug valve 501, ensuring the independence and stability of the flow supplementation path, and structurally isolating the interference of the plug valve 501 failure on the supplementation function.

[0039] In an optional implementation, the opening of the first control valve 200 is not less than 30%. This setting is based on a precise consideration of the cooling safety threshold. When the system triggers flow compensation, the first control valve 200 can immediately provide a supplementary capacity of not less than 30% of the total flow. After being superimposed with the flow that may remain in the main pipeline, it can quickly break through the original interlock protection stop rolling threshold, avoid unplanned stop rolling, and at the same time provide sufficient cooling water for the rolls to alleviate the thermal expansion effect.

[0040] In an optional embodiment, the first control valve 200 is configured as a pneumatic butterfly valve. Pneumatic butterfly valves offer fast response and high adjustment precision, enabling them to complete opening adjustments shortly after the controller issues a command. This adapts to the real-time flow adjustment requirements of the finishing mill, and the pneumatic drive method is unaffected by high-temperature environments, allowing for stable operation under harsh conditions near the rolls, ensuring timely and reliable flow compensation.

[0041] In an optional embodiment, the first control valve 200 is set to a normally closed state, which can avoid diverting the main pipeline flow through the supplementary pipeline 100 when it is not necessary, and ensure that the cooling water flows through the main pipeline and the plug valve 501 according to the preset process during normal rolling, thereby reducing pipeline resistance loss. At the same time, the normally closed state allows the first control valve 200 to respond with a clear action signal when triggered, reducing the risk of misoperation. It is only activated when the flow supplement is really needed, which is energy-saving and efficient.

[0042] In an optional embodiment, the flow meter 400 is installed on the cooling main pipe 502 on the side of the supplementary pipe 100 facing the water inlet end, so that when the flow meter 400 is in this position, it prioritizes monitoring the total water flow entering the system and obtains the original data before the water flow is distributed to the downstream of the main pipe or the supplementary pipe 100. This ensures that the controller's judgment on the flow gap is more accurate, avoids adjustment lag due to data deviation after diversion, and provides a more reliable basis for the timely action of the first control valve 200.

[0043] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of this utility model.

[0044] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0045] It should be understood that in the description of this utility model, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0048] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0049] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0050] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A cooling protection system for hot rolling rolls, characterized in that, The cooling protection system includes: A supplementary pipeline, with both ends connected to the main cooling pipeline, is configured to be connected in parallel with a stopcock valve and can guide the flow of cooling water in the main cooling pipeline. The first control valve is located on the replenishment pipeline; Flow meters are used to be installed on the main cooling pipe; The controller is connected to the first control valve and the flow meter respectively. The controller can receive and process the flow information obtained by the flow meter and control the first control valve to adjust to the target opening degree.

2. The cooling protection system for hot rolling rolls as described in claim 1, characterized in that: A second control valve is installed on the supplementary pipeline.

3. The cooling protection system for hot rolling rolls as described in claim 2, characterized in that: The second control valve is set to the normally open state.

4. The cooling protection system for hot rolling rolls as described in claim 2, characterized in that: The second control valve is configured as a manual rotary valve.

5. The cooling protection system for hot rolling rolls as described in claim 1, characterized in that: The inner diameter of the supplementary pipeline is not less than the inner diameter of the main cooling pipeline.

6. The cooling protection system for hot rolling rolls as described in claim 1, characterized in that: The two ends of the supplementary pipeline are respectively located on the outer sides of the two ends of the plug valve.

7. The cooling protection system for hot rolling rolls as described in claim 1, characterized in that: The opening degree of the first control valve is not less than 30%.

8. The cooling protection system for hot rolling rolls as described in claim 1, characterized in that: The first control valve is configured as a pneumatic butterfly valve.

9. The cooling protection system for hot rolling rolls as described in claim 1, characterized in that: The first control valve is set to a normally closed state.

10. The cooling protection system for hot rolling rolls as described in claim 1, characterized in that: The flow meter is installed on the cooling main pipe on the side of the supplementary pipeline facing the water inlet.

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