Device for controlling cooling rate of steel coil at constant temperature

Abstract

The utility model relates to a device for controlling the cooling rate of a steel coil at a constant temperature, which comprises the steel coil, a steel coil seat, a constant-temperature cover, a hanging ring, an electric heater, a constant-temperature air cooling unit and a heat-insulating wall, the steel coil is placed on the steel coil seat, the steel coil seat is uniformly distributed in a heat-insulating chamber formed by the heat-insulating wall, the constant-temperature cover is arranged at the top of the heat-insulating wall, and the hanging ring is arranged on the constant-temperature cover. Electric heaters are evenly distributed on the inner side of the heat preservation wall, a constant-temperature air cooling unit is arranged on the outer side of the heat preservation wall, a hanging ring is arranged on the top of the constant-temperature cover, and a temperature detector is arranged in the heat preservation wall. The material characteristics of internal stress, grain shape, plasticity, toughness and the like of the special steel are improved, different capacity requirements are met through different temperature control conditions according to the requirements of different customers, the quality of the special steel is further improved, and higher benefits are created.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling equipment, in particular to a device for controlling the cooling rate of a steel coil at a constant temperature. Background Art

[0002] At present, some special steel grades in China, especially new energy vehicle steel, steel wire steel, and steel for special industries are strategic varieties that are focused on production. They are used in the country's key new energy and other extremely important equipment manufacturing, and have a wide range of uses. The quality of hot-rolled and cold-rolled materials determines the quality of the finished products for users, especially the constant temperature heat treatment of steel coils determines the internal stress, grain shape, plasticity, toughness and other material properties of the final product. Constant temperature control is the quality guarantee of cold-rolled products.

[0003] Nowadays, users of special steel grades have increasingly strict requirements on the quality of hot-rolled strip products, which is reflected in the high requirements not only on material properties and plate thickness, but also on the uniformity and strength of the cross-sectional stress, grain shape, plasticity, and toughness of the strip. These issues are becoming increasingly prominent and are receiving more and more attention. The change of the internal structure of special steel caused by constant temperature control is not only an important quality indicator of hot-rolled strip, but also an important factor in determining the market competitiveness of products. Therefore, constant temperature control of hot-rolled special steel is particularly important.

[0004] In order to improve the quality requirements of special steel grades, it is urgent to develop a device for constant temperature control of steel coil speed, which can not only improve product quality but also achieve market customer satisfaction. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a device for controlling the cooling rate of a steel coil at a constant temperature. By controlling the cooling rate of the steel coil at a constant temperature, the steel coil is kept in a controllable temperature range and slowly cooled, so that the steel properties such as the internal stress, grain shape, plasticity and toughness of the steel coil are effectively improved. The characteristic requirements of steels of different special materials are met through different temperature controls, the yield rate is high, the quality of special steel is good, and a reliable guarantee for the subsequent improvement of the quality of cold-rolled finished products.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A device for controlling the cooling rate of a steel coil at a constant temperature comprises a steel coil, a steel coil seat, a constant temperature cover, a hanging ring, an electric heater, a constant temperature air cooling unit, and an insulation wall. The steel coil is placed on the steel coil seat, and the steel coil seat is evenly placed in an insulation room composed of the insulation wall. A constant temperature cover is arranged on the top of the insulation wall, electric heaters are evenly arranged on the inner side of the insulation wall, a constant temperature air cooling unit is arranged on the outer side of the insulation wall, a hanging ring is arranged on the top of the constant temperature cover, and a temperature detector is arranged inside the insulation wall.

[0008] Furthermore, the thermal insulation wall is made of special refractory bricks, and thermal insulation asbestos is arranged inside the refractory bricks.

[0009] Furthermore, the steel coil seat is a V-shaped steel coil seat with an inclination angle of 30° to 45°.

[0010] Furthermore, the temperature range of the electric heater is 100°C to 500°C.

[0011] Furthermore, the temperature range of the constant temperature air cooling unit is 0°C to 40°C.

[0012] Furthermore, the constant temperature air cooling unit supplies air during the heating process of the electric heater.

[0013] Furthermore, the constant temperature air cooling unit performs rapid cooling during the rapid cooling process.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) Under the premise of ensuring the original quality and precision of the steel coil, improve the internal stress, grain shape, plasticity, toughness and other material properties of the steel coil. According to the requirements of different customers, different capacity requirements are met through different temperature control heat treatment conditions, further improve the quality of the steel coil and create higher benefits.

[0016] 2) It can realize low-temperature uniform or variable speed cooling, and can also realize heating uniform speed and variable speed temperature cooling. According to the different performance requirements of the steel coil, different temperature control heat treatment methods are adopted to achieve it. The temperature control accuracy is high, the characteristics of the steel coil material are improved, the yield rate is high, the steel coil quality is good, and the subsequent cold rolling effect is good, providing quality assurance for the subsequent cold rolled products.

[0017] 3) The utility model has a durable structure and is easy to maintain. It is suitable for use with special steel and conventional steel, has a wide range of uses, a simple and quick control method, high production efficiency, low workload, and good yield effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of a device for controlling the cooling rate of a steel coil at a constant temperature.

[0019] Figure 2 The utility model is a top view of a device for controlling the cooling rate of a steel coil at a constant temperature.

[0020] In the figure: 1. Steel coil; 2. Steel coil seat; 3. Constant temperature cover; 4. Lifting ring; 5. Electric heater; 6. Constant temperature air cooling unit; 7. Insulation wall. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described below:

[0022] In the description of this patent, it is necessary to understand that the orientation or position relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" is usually based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description. Unless otherwise stated, these directional words 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, and therefore cannot be understood as limiting the scope of protection of the utility model: the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0023] For ease of description, spatially relative terms such as "above", "above", "on the upper surface", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Therefore, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present utility model.

[0024] like Figure 1-Figure 2 As shown, the working principle of a device for controlling the cooling rate of a steel coil at a constant temperature is as follows: an insulation chamber is formed by using an insulation wall 7 and a constant temperature cover 3, and the steel coil 1 is placed therein. The temperature inside the insulation wall 7 is heated by an electric heater 5, and cold air is blown into the insulation wall 7 by a constant temperature air cooling unit 6. The cold air and the electric heater 5 control the insulation wall 7 to maintain a constant temperature. The temperature inside the insulation wall 7 is evenly distributed by air flow. According to the material properties required for the steel coil 1, the constant temperature inside the insulation wall 7 is controlled to improve the material properties of the steel coil 1, such as internal stress, grain shape, toughness and plasticity, so as to meet the different capacity requirements of different steel coils.

[0025] like Figure 1-Figure 2 As shown, according to the different performance requirements of different steel coils 1, the use temperature, material, installation form and equipment quality are comprehensively analyzed and designed.

[0026] A device for controlling the cooling rate of a steel coil at a constant temperature comprises a steel coil 1, a steel coil seat 2, a constant temperature cover 3, a hanging ring 4, an electric heater 5, a constant temperature air cooling unit 6, and an insulation wall 7. The steel coil 1 is placed on the steel coil seat 2, and the steel coil seat 2 is evenly placed in an insulation room formed by the insulation wall 7. A constant temperature cover 3 is arranged on the top of the insulation wall 7, and a hanging ring 4 is installed on the top of the constant temperature cover 3. Special refractory bricks are used, and insulation asbestos is installed inside. The main frame is made of 15# channel steel, and a 20mm thick steel plate is welded on the upper part. The steel plate is made of 45# steel. Electric heaters 5 are evenly arranged on the inner side of the insulation wall 7. The electric heaters 5 heat the temperature inside the insulation wall 7. Constant temperature air cooling units 6 are arranged on the outer side of the insulation wall 7. The constant temperature air cooling units 6 are responsible for conveying cold air into the insulation wall 7. The heating temperatures of the cold air and the electric heater 5 offset each other to ensure that the temperature inside the insulation wall 7 remains constant. A temperature detector is arranged in the insulation wall 7 to monitor the temperature inside the insulation wall 7 to achieve different constant temperature controls.

[0027] Furthermore, the insulation wall 7 is made of special refractory bricks, and insulation asbestos is arranged inside the refractory bricks.

[0028] Furthermore, the steel coil seat 2 is a V-shaped steel coil seat with an inclination angle of 30° to 45°, made of 45# steel, and a length of 2150mm.

[0029] Furthermore, the temperature range of the electric heater 5 is 100°C to 500°C.

[0030] Furthermore, the temperature range of the constant temperature air cooling unit 6 is 0°C to 40°C.

[0031] Furthermore, the constant temperature air cooling unit 6 only supplies air during the heating process of the electric heater 5 .

[0032] Furthermore, the constant temperature air cooling unit 6 performs rapid cooling during the rapid cooling process.

[0033] like Figure 1-Figure 2 As shown, a working method of a device for controlling the cooling rate of a steel coil at a constant temperature is as follows: a steel rope is fixed to a lifting ring 4 by a crane, a constant temperature cover 3 is lifted to a fixed placement position, and then a steel coil 1 requiring the same performance is placed on a steel coil seat 2 in a heat preservation wall 7, and then the constant temperature cover 3 is restored to its original position, a temperature detector is used for constant temperature control, an electric heater 5 is used for heating, a constant temperature air cooling unit 6 is only used for air supply, the temperature of the steel coil 1 in the device is controlled at a constant temperature, and the temperature is evenly distributed by air flow; when the steel coil 1 needs to be cooled quickly, only the constant temperature air cooling unit 6 is used for rapid cooling by applying the cooling function.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for controlling the cooling rate of a steel coil at a constant temperature, comprising a steel coil, a steel coil seat, a constant temperature cover, a hanging ring, an electric heater, a constant temperature air cooling unit, and a heat preservation wall, wherein the steel coil is placed on the steel coil seat, and characterized in that: The steel coil seats are evenly placed in the insulation room composed of insulation walls, a constant temperature cover is arranged on the top of the insulation wall, electric heaters are evenly arranged on the inside of the insulation wall, a constant temperature air cooling unit is arranged on the outside of the insulation wall, a hanging ring is arranged on the top of the constant temperature cover, and a temperature detector is arranged inside the insulation wall.

2. The device for controlling the cooling rate of a steel coil at a constant temperature according to claim 1, characterized in that: The heat-insulating wall is made of special refractory bricks, and heat-insulating asbestos is arranged inside the refractory bricks.

3. The device for controlling the cooling rate of a steel coil at a constant temperature according to claim 1, characterized in that: The steel coil seat is a V-shaped steel coil seat with an inclination angle of 30° to 45°.

4. The device for controlling the cooling rate of a steel coil at a constant temperature according to claim 1, characterized in that: The temperature range of the electric heater is 100°C to 500°C.

5. The device for controlling the cooling rate of a steel coil at a constant temperature according to claim 1, characterized in that: The temperature range of the constant temperature air cooling unit is 0°C to 40°C.

6. A device for controlling the cooling rate of a steel coil at a constant temperature according to claim 1 or 5, characterized in that: The constant temperature air cooling unit supplies air during the heating process of the electric heater.

7. A device for controlling the cooling rate of a steel coil at a constant temperature according to claim 1 or 5, characterized in that: The constant temperature air cooling unit performs rapid cooling during the rapid cooling process.

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