A new type of roll cooling device

Abstract

The utility model discloses a novel roller cooling device, the arc pipe body is arranged at intervals with roller, and the water inlet end of arc pipe body is connected with the water inlet pipeline, and the water inlet pipe is supported through the support, and the support is composed of two symmetrical arc clamping plates, a plurality of nozzles are evenly distributed at one end of roller where the arc pipe body is located, and the spraying end is towards roller, the central axis of nozzle is set as 0 35 0 with the tangent direction of corresponding roller, avoids the perpendicular water spraying of nozzle to roller surface, makes the cooling water flow close to roller surface with the tangential direction, significantly reduces the water flow rebound loss, improves the cooling effect, and the divergent nozzle increases the cooling area, realizes the roller surface cooling uniformity, avoids the local thermal stress concentration, and the nozzle is evenly distributed on the arc pipe body with the central angle 15 20 15, and its direction is opposite to the roller rotating direction, and the water stays on the roller for a longer time, and the cooling effect is strengthened.

Description

Technical Field

[0001] This utility model relates to the technical field of rolling mill cooling equipment, specifically a novel rolling mill cooling device. Background Technology

[0002] Rolls are crucial processing components in hot-rolled steel production in steel mills. During operation, rolls come into direct contact with the steel and experience sliding friction, resulting in temperatures typically reaching 1000–1200℃. Therefore, timely cooling is essential. Currently, a common method is to install a water pipe above the roll, spraying water vertically along its surface. However, when the water jet impacts the high-temperature roll surface, it is prone to violent rebound and splashing, failing to form an effective cooling film. This leads to low heat exchange efficiency, making it difficult to quickly remove heat. The concentrated impact points of the water jet result in localized overcooling while other areas remain insufficiently cooled, causing uneven temperature distribution on the roll surface. This generates significant thermal stress, easily leading to hairline cracks, burning, grooving, material loss, and even roll breakage. This not only wastes rolls but also affects product quality. Utility Model Content

[0003] The purpose of this invention is to provide a novel roll cooling device to solve the problem that when water flows vertically impacts the surface of a high-temperature roll, it is prone to violent rebound and splashing, making it impossible to form an effective cooling water film. This results in low heat exchange efficiency, difficulty in quickly removing heat, local overcooling at the concentrated impact point of the water flow, and insufficient cooling in other areas, causing uneven temperature distribution on the roll surface, generating huge thermal stress, and making the roll prone to hairline cracks, burning cracks, groove bursts, chipping, or even roll breakage.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel roll cooling device, comprising nozzles, an arc-shaped tube, and a support. The arc-shaped tube is spaced apart from the roll, and the water inlet end of the arc-shaped tube is connected to a water inlet pipe. The water inlet pipe is supported by the support, which consists of two symmetrical arc-shaped clamping plates. The arc-shaped ends of the plates are tightly fitted to the outer circumference of the water inlet pipe. Connecting plates extending outward are provided on both sides of the arc-shaped clamping plates. The connecting plates at one end of the two arc-shaped clamping plates are connected by bolts and secured with nuts, while the other end is connected to a fixed plate. Several nozzles are evenly distributed at one end of the arc-shaped tube located on the roll, with the spraying end facing the roll and opposite to the rotation direction of the roll. The central axis of the nozzle is set at 0°-35° to the tangent direction of the corresponding roll.

[0005] Preferably, the nozzle has a cross-section that is wider at the top and narrower at the bottom, and the nozzle width is 1.5mm to 3.5mm.

[0006] Preferably, the nozzles are evenly distributed on the arc-shaped tube at a central angle of 15° to 20°.

[0007] Preferably, it also includes a roll temperature sensor connected to the arc-shaped tube body, located at the end of the spraying process, with the monitoring end facing the roll, for monitoring the roll temperature.

[0008] Preferably, the water inlet pipe is equipped with an electric regulating valve, which is connected to the roll temperature sensor.

[0009] Preferably, the inlet end of the water inlet pipe is provided with a filter screen with a pore size ≤ 0.5 mm.

[0010] Preferably, the arc-shaped tube, the water inlet pipe, and the nozzle are all made of high-temperature resistant materials.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The nozzle direction should be 0° to 35° from the tangent direction of the roll corresponding to the nozzle. Avoid spraying water perpendicularly to the roll surface. Instead, allow the cooling water to flow tangentially close to the roll surface, significantly reducing water flow rebound loss and improving the cooling effect.

[0013] 2. The nozzle cross-section is wider at the top and narrower at the bottom, which is divergent and promotes the water flow to spread naturally into a fan-shaped water curtain. The divergent nozzle increases the cooling area, achieves uniform cooling of the roll surface, and avoids local thermal stress concentration.

[0014] 3. The nozzles are evenly distributed on the arc-shaped tube at a central angle of 15° to 20°, and their orientation is opposite to the rotation direction of the roll. This prolongs the time that the water stays on the roll, thus enhancing the cooling effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] In the diagram: 1. Roll; 2. Nozzle; 3. Tube body; 4. Support; 5. First included angle; 6. Second included angle; 7. Roll temperature sensor. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1: Please refer to Figure 1This utility model provides an embodiment of a novel roll cooling device, comprising nozzles 2, an arc-shaped tube 3, and a support 4. The arc-shaped tube 3 is spaced apart from the roll 1 and serves as the main body for distributing cooling water. Its arc-shaped ends are closed on both sides, uniformly supplying water to each nozzle 2 along the roll's curvature. The arc-shaped ends match the outer circumference of the roll 1, ensuring that all nozzles 2 connected to it are equidistant from the roll 1. The water inlet end of the arc-shaped tube 3 is connected to a water inlet pipe, which is supported by the support 4. The support 4 secures the water inlet pipe with arc-shaped clamping plates, connecting the entire device to a fixed plate. The distance between the arc-shaped tube 3 and the roll 1 can be adjusted by adjusting the position of the clamping water inlet pipe. The support 4 consists of two symmetrical arc-shaped clamping plates, with their arc-shaped ends... The arc-shaped clamping plate is not tightly fitted to the outer circumference of the water inlet pipe. Connecting plates extending outwards are provided on both sides of the arc-shaped clamping plate. The connecting plates at one end of the two arc-shaped clamping plates are connected by bolts and secured with nuts. This detachable design facilitates unlocking the bracket 4, thereby adjusting the distance between the arc-shaped tube 3 and the roll 1 or locking the position. The other end is connected to a fixed plate. Several nozzles 2 are evenly distributed at one end of the arc-shaped tube 3 located on the roll 1, with the spraying end facing the roll 1 and opposite to the rotation direction of the roll 1. The central axis of the nozzles 2 is set at 0°-35° to the tangent direction of the corresponding roll 1, reducing the water flow rebound effect during vertical spraying. This allows the cooling water to flow tangentially close to the surface of the roll 1, significantly reducing water flow rebound loss, enhancing water film adhesion, and improving heat exchange efficiency.

[0022] The cross-section of nozzle 2 is radiating, wider at the top and narrower at the bottom, causing the water flow to naturally diffuse into a fan-shaped water curtain. The radiating nozzle 2 increases the cooling area, achieving uniform cooling of the roll 1 surface and avoiding localized thermal stress concentration. The width of nozzle 2 is 1.5mm to 3.5mm; in this embodiment, the width of nozzle 2 is 2.0mm. The nozzles 2 are evenly distributed on the arc-shaped tube 3 with a central angle of 15° to 20°, forming a fan-shaped water curtain. The coverage area of ​​a single nozzle is increased by more than two times, solving the problem of uneven cooling. In this embodiment, the central angle is set to 15°. (See reference [link to specific details]). Figure 1 The first included angle 5 is centered on the center of the roll 1, and the included angle between adjacent nozzles 2 is the second included angle 6, which is 15°. It also includes a roll temperature sensor 7, which monitors the surface temperature of the roll in real time and feeds it back to the control system to dynamically adjust the amount of water sprayed out. It is connected to the arc-shaped pipe 3 and located at the end of the spraying. The monitoring end faces the roll 1 and is used to monitor the temperature of the roll 1. An electric regulating valve is installed on the water inlet pipe. The electric regulating valve is connected to the roll temperature sensor 7 and automatically adjusts the water inlet according to the temperature signal to avoid overcooling or insufficient cooling. A filter screen with a pore size ≤0.5mm is installed at the water inlet end of the water inlet pipe to filter impurities in the cooling water and prevent the nozzles 2 from clogging. The arc-shaped pipe 3, the water inlet pipe and the nozzles 2 are all made of high temperature resistant materials.

[0023] When the roll temperature sensor 7 detects that the surface temperature exceeds the threshold, it triggers the electric regulating valve to open. Cooling water, after being purified by the filter, enters the arc-shaped pipe 3 and is sprayed from the divergent nozzles at a tangential angle of 0°-35° against the direction of roll rotation. The water flow adheres to the surface of the roll 1 to form a thin water film. The reverse spraying prolongs the contact time by 60%, rapidly absorbing heat. The roll temperature sensor 7 provides real-time data feedback, and the electric regulating valve automatically increases or decreases the flow rate to maintain the working temperature of the roll 1. After the roll 1 stops rotating, the electric valve closes to block the water flow and prevent low-temperature corrosion. The above description is only an embodiment of this utility model. Commonly known structures and characteristics in the solution are not described in detail here. For those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel roll cooling device, characterized in that: The device includes a nozzle (2), an arc-shaped tube (3), and a bracket (4). The arc-shaped tube (3) is spaced apart from the roller (1). The water inlet end of the arc-shaped tube (3) is connected to the water inlet pipe. The water inlet pipe is supported by the bracket (4). The bracket (4) is composed of two symmetrical arc-shaped clamping plates. The arc-shaped ends are tightly fitted to the outer circumference of the water inlet pipe. The two ends of the arc-shaped clamping plates are respectively provided with outwardly extending connecting plates. The connecting plates at one end of the two arc-shaped clamping plates are connected by bolts and fastened by nuts. The other end is connected to a fixed plate. The arc-shaped tube (3) is located at one end of the roller (1) with several nozzles (2) evenly distributed. The spraying end faces the roller (1) and is opposite to the rotation direction of the roller (1). The central axis of the nozzle (2) is set at 0°-35° with the tangent direction of the corresponding roller (1).

2. The novel roll cooling device according to claim 1, characterized in that: The cross-section of the nozzle (2) is divergent, wider at the top and narrower at the bottom, and the width of the nozzle (2) is 1.5mm to 3.5mm.

3. The novel roll cooling device according to claim 1, characterized in that: The nozzles (2) are evenly distributed on the arc-shaped tube (3) with a central angle of 15° to 20°.

4. The novel roll cooling device according to claim 1, characterized in that: It also includes a roll temperature sensor (7), which is connected to the arc-shaped tube (3) and located at the end of the spraying. The monitoring end faces the roll (1) and is used to monitor the temperature of the roll (1).

5. The novel roll cooling device according to claim 1, characterized in that: An electric regulating valve is installed on the water inlet pipe, and the electric regulating valve is connected to the roll temperature sensor (7) for signal transmission.

6. The novel roll cooling device according to claim 1, characterized in that: The inlet end of the water inlet pipe is equipped with a filter screen with a pore size ≤ 0.5mm.

7. The novel roll cooling device according to claim 1, characterized in that: The arc-shaped tube (3), the water inlet pipe, and the nozzle (2) are all made of high-temperature resistant materials.

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