Steel billet end heat compensation device based on electric heating technology

Abstract

The utility model relates to a steel billet end part heat compensation device based on an electric heating technology. The steel billet end part heat compensation device comprises a radiation cover, the plurality of heating elements are arranged around the radiation cover; and a heat preservation cover covering the heating element is arranged outside the radiation cover. The heating element is isolated from the external environment and is not in direct contact with the outside or the steel billet all the time in the whole process, the working environment is relatively stable, and the service life of the heating element is effectively prolonged; the radiation cover is made of a high-thermal-conductivity, high-specific-heat-capacity and high-radiation-intensity material, and rapid overall heat storage, large-capacity heat storage and rapid output heating are effectively achieved. A heating environment is isolated from a heat storage environment, a heat storage radiation cover is added in the heat transfer process of a heating element and a steel billet, and the effects of prolonging the service life of the heating element and heating the end of the steel billet are achieved in an indirect heating mode. In the loading or no-load process of the steel billet, the temperature change is relatively slow; and meanwhile, the impact and adhesion damage of the oxide scale to the heating element are avoided.

Description

Technical Field

[0001] This utility model relates to an electric heating device, specifically a steel billet end heating device based on electric heating technology, belonging to the field of industrial heating equipment and electric heating technology. Background Technology

[0002] During the direct rolling process of steel, hot cracks may occur due to the relatively rapid cooling rate at the ends, a condition known as end "blooming". "Blossoming" may lead to dangerous situations such as flying steel during the rolling process, and will also increase the amount of steel billet cut-off at the ends, resulting in waste of resources. Therefore, it should be avoided as much as possible.

[0003] On the other hand, electric heating technology has the advantages of stable operation, high control precision, and strong flexibility, giving it a clear advantage in the heating field.

[0004] However, one of the main problems currently encountered in the field of billet heating is the lifespan of heating elements. In complex environments and with frequent temperature changes, the lifespan of heating elements will decrease sharply, which will increase the frequency of production line downtime for maintenance and the cost of equipment replacement.

[0005] Therefore, it is meaningful to develop a long-life electric heating device to reheat the ends of steel billets. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a steel billet end heating device based on electric heating technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A steel billet end heating device based on electric heating technology includes a radiant cover that is hollow inside and open at both ends;

[0009] Several heating elements are arranged around the radiation shield;

[0010] Furthermore, the radiation shield is provided with an insulation cover that covers the heating element.

[0011] Along its length, the cross-section of one side of the aforementioned heat insulation cover is concave.

[0012] Furthermore, the aforementioned heat insulation cover and radiation cover form a U-shaped sealed cavity.

[0013] The cross-section of the aforementioned radiation shield is polygonal.

[0014] Furthermore, the heating elements are arranged in several groups, with each group of heating elements placed at the top, bottom, and sides of the radiation shield.

[0015] The advantages of this utility model are:

[0016] This utility model discloses a steel billet end heating device based on electric heating technology.

[0017] On the one hand, the heating element is isolated from the external environment and never comes into direct contact with the outside world or the steel billet throughout the process. Its working environment is relatively stable, which effectively improves the service life of the heating element. At the same time, it also eliminates the impact and adhesion damage of iron oxide scale to the heating element.

[0018] On the other hand, by selecting materials with high thermal conductivity, high specific heat capacity, and high emissivity as radiation shields, rapid overall heat storage, large-capacity heat storage, and rapid output heating can be effectively achieved.

[0019] It isolates the heating environment from the heat storage environment and adds a heat storage radiation cover during the heat transfer process between the heating element and the billet. By using indirect heating, it can improve the life of the heating element and heat the end of the billet. Moreover, the temperature change is relatively slow during the loading or unloading process of the billet.

[0020] The billet end heating device of this utility model has a simple structure, is easy to arrange and use, and has low coupling between the operation of the equipment and the site environment. Even if the equipment is not working, no additional dismantling is required and the billet can pass through directly. It has strong practicality and wide applicability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the heating device.

[0022] Figure 2 This is a partial cross-sectional view of the structural schematic diagram of the heat exchange device.

[0023] Figure 3 This is a diagram showing the arrangement of the heating elements.

[0024] The meanings of the markings in the attached diagram are as follows:

[0025] 1. Radiation shield, 2. Insulation shield, 3. Heating element, 4. Steel billet. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] A billet end heating device based on electric heating technology consists of a heating element 3, an insulation cover 2, and a radiation cover 1.

[0028] The radiation shield is hollow inside and open at both ends, with the hollow cavity serving as the heat exchange chamber. The cross-section of the radiation shield is polygonal; preferably, in this embodiment, it is shaped as follows: Figure 1 The rectangle shown is preferably made of silicon carbide. The hollow internal channel of the radiation shield serves as the heat exchange cavity.

[0029] The outer wall of the heat insulation cover is surrounded by a ring-shaped heat insulation cavity. The inner side of the heat insulation cavity is open, meaning that the cross-section of one side of the heat insulation cover along its length is concave. The heat insulation cover is fixed inside the ring of the heat insulation cover, closing the heat insulation cavity and making the heat insulation cavity a U-shaped sealed cavity.

[0030] Several heating elements are disposed within the insulation cavity. Preferably, the heating elements are arranged in several groups, with each group of heating elements positioned at the top, bottom, and sides of the radiation shield, such as... Figure 3 As shown.

[0031] The heating element is preferably a silicon carbide rod.

[0032] When using,

[0033] For a certain period of time, due to the production interval, the equipment is empty and there are no steel billets 4.

[0034] The top and bottom rod-shaped heating elements and the side door-shaped silicon carbide heating rods work continuously, maintaining the surface temperature of the heating elements at around 1400℃, heating the heat insulation cover and the silicon carbide heat storage radiation cover to a constant temperature.

[0035] After the billet is loaded, it is radiantly heated by the high-temperature heat storage radiation hood. After a certain heating time (which can be flexibly adjusted according to the production rhythm and heating requirements), the head of the billet is heated and sent to the rolling mill for direct rolling. During this period, the heating elements continue to work.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A billet end heating device based on electric heating technology, characterized in that, Including a radiation shield that is hollow inside and transparent at both ends; Several heating elements are arranged around the radiation shield; Furthermore, the radiation shield is provided with an insulation cover that covers the heating element.

2. The heat replenishment device according to claim 1, characterized in that, The radiation shield has a polygonal cross-section.

3. The heat replenishment device according to claim 1, characterized in that, Along its length, the cross-section on one side of the heat insulation cover is concave.

4. The heat replenishment device according to claim 3, characterized in that, The heat insulation cover and the radiation cover form a closed cavity in the shape of a "U".

5. The heat replenishment device according to claim 1, characterized in that, The heating elements are arranged in several groups, with each group of heating elements placed at the top, bottom, and sides of the radiation shield.

Images