Quenching water device outside coiling machine
The external rapid cooling water device of the coiler achieves uniform cooling of the entire strip, solving the problem of excessively high coiling temperature, shortening cooling time, improving product quality and production efficiency, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-27
AI Technical Summary
In existing strip steel production, excessively high coiling temperatures lead to prolonged cooling time, uneven cooling, and insufficient pickling, affecting product quality and production efficiency. Traditional cooling devices are complex in structure and expensive.
An external rapid cooling water device is adopted for the coiler, using the circulating water in the pit as the cooling medium. The device achieves uniform cooling across the entire width through a strong cooling water cannon and nozzle spray assembly. Combined with the electromagnetic pneumatic valve and the signal linkage of the coiler, the spray timing is automatically controlled to ensure precise temperature control.
It significantly shortens the cooling cycle, reduces the strip coiling temperature by 200℃, improves cooling efficiency, reduces interlayer looseness and insufficient pickling defects, lowers equipment investment and maintenance costs, and improves product quality and production efficiency.
Smart Images
Figure CN224050764U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the metallurgical industry strip steel production technical field, concretely relates to a coiler outer rapid cooling water device. BACKGROUND
[0002] In the strip steel production process, temperature control is one of the key factors affecting product quality. With the continuous development of metallurgical industry, the performance requirements of strip steel are getting higher and higher, and the temperature control of strip steel in the coiling process is crucial. When the coiler is coiling the strip steel, it often only cools through laminar cooling water. In the case of fast production rhythm, slow external temperature and water temperature adjustment speed, etc., it is difficult to achieve precise control of the final coiling temperature of the strip steel, resulting in the situation that the final coiling temperature is too high. Because the high-temperature strip steel needs longer time to cool, the entire production cycle is prolonged. The existing strip steel cooling system has high incidence of quality defects such as insufficient pickling after cooling and affects product quality and downstream use effect, reducing the competitiveness of products.
[0003] In addition, some existing cooling methods have many shortcomings. For example, natural cooling is slow and cannot meet the demand of efficient production; some traditional cooling methods are difficult to achieve precise temperature control and may have uneven cooling, resulting in unstable strip steel quality. At the same time, some cooling devices have complex structure, high cost and difficult maintenance, which is not conducive to enterprises to reduce production cost and improve market competitiveness.
[0004] In summary, in order to improve the quality and production efficiency of strip steel and meet the market demand for high-performance strip steel, an urgent need exists for a coiler outer rapid cooling water device that can achieve fast and accurate cooling of strip steel during coiling to improve strip steel quality and production efficiency. INVENTION CONTENTS
[0005] The present application aims to solve the technical problems of existing technology in strip steel production, such as high coiling temperature leading to prolonged cooling time of steel coil, loose layers, insufficient laminar cooling, pickling defects and low production efficiency. The existing technology relies on laminar cooling, but its adjustment speed is slow and the cooling is uneven, making it difficult to precisely control the coiling temperature. Natural cooling efficiency is low, and traditional forced cooling devices have complex structure and high cost. Therefore, the coiler outer rapid cooling water device is adopted to quickly reduce the coiling temperature of the strip steel by spraying rapid cooling water. The use of strip steel rapid cooling water not only solves the problem of insufficient laminar cooling, but also shortens the delivery time of finished products. The rapid cooling water used is pit circulating water, which is recycled and does not require additional water storage tank, thus being low in cost and easy to install and use.
[0006] To achieve the above purpose, the utility model provides the following technical scheme:
[0007] A coiler external quenching water device comprises:
[0008] A water storage unit, composed of a water storage pit and a water level detection device, is used for storing and recycling quenching water;
[0009] A conveying system, comprising a water pump and a corrosion-resistant conveying pipeline, connects the water storage pit and the spraying assembly through the corrosion-resistant conveying pipeline;
[0010] A spraying assembly, distributed on the driving side, the operating side and above the coiler, comprises two forms of quenching water guns and nozzles, covering the full width of the strip, and is used for uniformly spraying quenching water on the surface of the strip;
[0011] A control system, comprising electromagnetic pneumatic valves and interlocking modules, is linked with the coiler winding signal and automatically controls the spraying time.
[0012] As a preferred, the quenching water guns and nozzles of the spraying assembly are arranged on both sides and above the left of the coiler respectively, so as to ensure the uniformity of the transverse and longitudinal cooling of the strip.
[0013] As a preferred, the water level detection device on the water storage pit monitors the water level in real time and adjusts the water supply through the water pump.
[0014] As a preferred, the corrosion-resistant conveying pipeline is made of stainless steel or high polymer composite material and can resist long-term erosion of quenching water.
[0015] As a preferred, the electromagnetic pneumatic valves of the control system respond to the coiler winding signal and automatically open and close the spraying during the winding process of the strip.
[0016] Compared with the prior art, the technical effects and advantages of the present application are:
[0017] The coiler external quenching water device sprays through the full width of the quenching water guns and nozzles, and the winding temperature of the strip can be reduced by about 200 DEG C, significantly shortening the cooling period. The layout of the spraying assembly (both sides and above) covers the transverse and longitudinal areas of the strip, eliminates the cooling blind area, avoids local overheating or deformation, ensures the reduction of residual iron oxide scale on the surface of the strip, and stabilizes the quality. The control system integrates the PLC module, dynamically adjusts the spraying intensity in real time according to the temperature signal, maintains the temperature fluctuation within ± 20 DEG C, and the precision is far higher than that of the traditional cooling method. The problems that the traditional laminar flow cooling and natural cooling are difficult to accurately control the winding temperature, the winding temperature of the strip is too high, the cooling speed is slow, and the downstream production efficiency and product quality are affected are solved;
[0018] The coil outer quenching water device reduces the interlayer gap of the quenched coil, reduces the friction coefficient of the outer ring, reduces the risk of loosening and scratching during transfer, reduces the defect rate of insufficient pickling, improves the plate surface quality, and meets the production requirements of high-end products (such as precision instrument steel). The pickling and washing line speed is increased. The problems of the prior art that high-temperature coiling leads to interlayer loosening of the coil, high friction coefficient, and easy interlayer scratching, and the problem that the high defect rate of insufficient pickling limits the pickling and washing line speed are solved.
[0019] The coil outer quenching water device directly uses the plant pit circulating water, does not need to add a water storage tank, saves equipment investment and space occupation. The water level detection device is linked with the water pump, and water is supplied on demand, reducing energy waste. The smooth inner wall of the corrosion-resistant pipeline (such as 316L stainless steel) reduces water resistance, improves cooling efficiency, and reduces water transportation energy consumption. The corrosion-resistant pipeline has a long service life, reduces the risk of corrosion and blockage, significantly reduces maintenance frequency and cost, and solves the problems of the traditional cooling device, such as the need to add a water storage tank, complex structure, high maintenance cost, serious waste of water resources, and high energy consumption.
[0020] The coil outer quenching water device is linked with the coil PLC signal through an electromagnetic pneumatic valve, the spraying error is less than 0.5 seconds, the "steel strip enters and sprays, and separates and closes" are realized, and manual operation delay is avoided. The spraying pressure range is 0.5-2.0 MPa, which is suitable for different steel strip specifications and production rhythms, and has high flexibility. The fully automatic control system reduces manual intervention, reduces operation complexity, and improves line stability. The problems of the traditional cooling, such as dependence on manual adjustment, slow response speed, and easy cooling unevenness or resource waste due to operation delay, are solved. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is a structural schematic view of the utility model.
[0022] In the figure: 1, water storage pit; 2, water pump; 3, conveying pipeline; 4, spraying assembly; 5, control system. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0024] The following will be combined Figure 1 The present application will be further described in detail,
[0025] The embodiments of the present application disclose a coil outer quenching water device, comprising:
[0026] A water storage unit, composed of a water storage pit 1 and a water level detection device, is used to store and recycle the quenching water;
[0027] A conveying system, including a water pump 2 and a corrosion-resistant conveying pipeline 3, connects the water storage pit 1 with the spraying assembly 4 through the corrosion-resistant conveying pipeline 3;
[0028] The spraying assembly 4 is distributed on the drive side, the operation side and above the coiler, and includes two forms of strong cooling water cannons and nozzles, covering the full width of the strip, and is used to uniformly spray quenching water on the surface of the strip;
[0029] The control system 5 includes electromagnetic pneumatic valves and interlocking modules, and is linked with the coiler winding signal to automatically control the spraying timing.
[0030] The water storage unit uses the circulating water in the factory pit as the quenching water source, and monitors the water level in real time through the water level detection device, and cooperates with the water pump 2 to deliver water to the spraying assembly 4. The water pump 2 in the conveying system pressurizes the pit water, which is then delivered to the spraying assembly 4 through the corrosion-resistant pipeline to ensure a large flow of water supply. The spraying assembly 4 combines strong cooling water cannons (large flow coverage) and nozzles (fine adjustment) to spray quenching water on the surface of the strip from both sides and above the coiler, achieving uniform cooling of the full width. The control system 5 is interlocked with the coiler winding signal through electromagnetic pneumatic valves to automatically trigger the spraying action and accurately open and close during the coiling process of the strip.
[0031] The coiling temperature of the strip is reduced by about 200℃, avoiding defects such as interlayer loosening and insufficient pickling caused by high temperature. The time for cooling the strip to the delivery temperature is shortened, speeding up the order delivery. Without the need to add a water storage tank, the circulating water in the pit is directly used, reducing equipment investment and water resource waste. After quenching, the layers of the steel coil are more compact, reducing the risk of scratches and improving the surface quality; the pickling defect rate is reduced, and the speed of the pickling and washing line is increased.
[0032] Specifically, the strong cooling water cannons and nozzles of the spraying assembly 4 are arranged on both sides and above the coiler to ensure uniformity of the transverse and longitudinal cooling of the strip, ensuring sufficient quenching water and uniform cooling of the strip to prevent deformation of the strip. The transverse (both sides) covers the edges of the strip, and the longitudinal (above) covers the middle part of the strip, eliminating the cooling blind area and preventing local overheating deformation. The strong cooling water cannons provide large flow impact cooling, and the nozzles supplement fine adjustment to ensure that the cooling intensity matches the speed of the strip. Uniform spraying avoids stress concentration due to temperature difference and reduces strip warping or residual surface iron oxide scale.
[0033] Specifically, the water level detection device on the water storage pit 1 monitors the water level in real time and adjusts the water supply through the water pump 2. The water level in the pit is monitored in real time, and the water supply of the water pump 2 is automatically adjusted to avoid flow interruption due to low water level or overflow due to high water level. It ensures the continuity of quenching water supply and prevents production interruption. Water is supplied on demand to reduce energy waste caused by idling or excessive pumping of the water pump 2.
[0034] Specifically, the corrosion-resistant conveying pipeline 3 is made of stainless steel or polymer composite material, which can resist long-term scouring of quenching water. The stainless steel or polymer composite material can resist chemical corrosion and physical scouring of quenching water (containing iron oxide scale and impurities), and the service life is increased by more than 3 times. The risk of pipeline corrosion and blockage is reduced, and the maintenance frequency and cost are reduced. The smooth design of the inner wall reduces water resistance, maintains large-flow high-pressure water supply, and improves cooling efficiency.
[0035] Specifically, the electromagnetic pneumatic valve of the control system 5 responds to the coil steel signal of the coiler to automatically open and close the spray during the coiling of the strip steel. Based on the PLC signal of the coiler (such as the head of the strip steel entering the coiler), the spray is automatically opened and closed, with an error of less than 0.5 seconds, avoiding the delay of manual operation. The spray timing is synchronized with the speed of the strip steel and the coiling rhythm, and the cooling effect is stable. The valve is closed immediately after the strip steel is separated to prevent waste of water resources and equipment.
[0036] As shown in Figure 1 , the coiler outer quenching water device is installed on the drive side, the operation side and the upper left of the 1# coiler and the 2# coiler. The volume of the water storage pit 1 is 50m 3 , and an ultrasonic water level sensor (water level detection device) is built in. When the water level is lower than the set value, the water is automatically replenished. The power of the water pump 2 is 22kW, the flow is 300m3 / h, and the water is delivered to the spray assembly 4 through the DN200 stainless steel pipeline (conveying system). The strong cooling water gun is arranged above the coiler, the spray angle is 30°, covering the width direction of the strip steel; the nozzles are distributed on both sides with a spacing of 500mm, forming a cross spray net. The control system 5 receives the "coiling start" signal of the coiler PLC through the electromagnetic pneumatic valve, delays for 0.5 seconds to start spraying, the spray pressure is 1.5MPa, and the valve is closed after the tail of the strip steel is separated.
[0037] The spray assembly 4 adopts a combination of strong cooling water guns (for large-flow coverage) and nozzles (for fine adjustment), which are distributed on both sides and above the coiler to cover the full width of the strip steel. The water storage unit uses the circulating water of the factory pit, does not need to add a new water storage tank, and will not cause new space and water waste, and realizes automatic adjustment of water quantity through the water level detection device. The conveying pipeline 3 adopts corrosion-resistant materials (such as 316L stainless steel), and the inner wall is smooth to reduce water resistance and prolong the service life.
[0038] The electromagnetic pneumatic valve automatically opens the spray according to the coiler signal (such as the head of the strip steel entering the coiler), and closes after the tail is separated, and the spray pressure can be adjusted in the range of 0.5-2.0MPa.
[0039] The control system 5 integrates a PLC module, which receives temperature sensor signals in real time, dynamically adjusts the spray intensity, and ensures that the temperature of the strip steel is reduced by 200±20℃.
[0040] In addition, the spraying assembly 4 can also use ultrasonic atomizing nozzles instead of traditional nozzles to enhance the uniformity of cooling in the form of water mist. The water storage unit can be replaced by a factory circulating water system, directly connected to the existing water supply network, but a filter device needs to be added.
[0041] The device significantly optimizes the surface quality of the strip and the tightness between layers, meeting the needs of high-end manufacturing. After using the water quenching device outside the coiler, the coiling temperature of the quenched strip is reduced from 600-800 DEG C to 400-600 DEG C, and the cooling time is shortened. The interlayer gap of the steel coil is reduced, the interlayer friction coefficient of the outer ring is reduced, the pickling defect rate is reduced, and the pickling line speed is increased. The delivery cycle is compressed. The investment in the water storage tank is saved, the maintenance cost is reduced, and the energy waste is reduced.
[0042] The water quenching device outside the coiler can improve the downstream pickling defects and increase the pickling line speed. After the pickling defects are improved, the surface quality of the plate is good, which can be used to make more precise and high-end products. The device not only improves the core competitiveness of strip production, but also provides technical support for energy saving and emission reduction and green transformation of the factory, and has significant market promotion value.
[0043] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.
Claims
1. A coiler outer quench water device characterized by, It comprises: a water storage unit composed of a water storage pit (1) and a water level detection device, used for storing and recycling quenching water; a conveying system including a water pump (2) and a corrosion-resistant conveying pipeline (3), the water pump (2) being connected with the water storage pit (1) and a spraying assembly (4) through the corrosion-resistant conveying pipeline (3); the spraying assembly (4) being distributed on the driving side, the operating side and above the coiler, including two forms of quenching water guns and nozzles, covering the full width of the strip, used for uniformly spraying quenching water on the surface of the strip; a control system (5) including electromagnetic pneumatic valves and interlocking modules, linked with the coiler winding signal, automatically controlling the spraying time.
2. A coiler outer quench water device according to claim 1, characterized in that: The quenching water guns and nozzles of the spraying assembly (4) are arranged on both sides of the coiler and above the left side respectively, so as to ensure the uniformity of the transverse and longitudinal cooling of the strip.
3. A coiler outer quench water device according to claim 1, characterized in that: The water level detection device on the water storage pit (1) monitors the water level in real time, and adjusts the water supply through the water pump (2).
4. A coiler outer quench water device according to claim 1, characterized in that: The corrosion-resistant conveying pipeline (3) is made of stainless steel or high polymer composite material.
5. A quench water device for a coiler as defined in claim 1, characterized in that: The electromagnetic pneumatic valve of the control system (5) responds to the coiler winding signal, and automatically opens and closes the spraying during the winding process of the strip.