Heating structure for intermediate frequency furnace and intermediate frequency smelting furnace

Abstract

The utility model relates to the technical field of metal smelting equipment, in particular to a heating structure for an intermediate frequency furnace and the intermediate frequency smelting furnace. The heating structure comprises a crucible body, the side face of the lower portion of the crucible body is communicated with a drainage tube, an induction coil is arranged outside the crucible body, the induction coil is provided with a plurality of turns of coils, and the coil, adjacent to the drainage tube, in the induction coil is provided with a bent section used for avoiding the drainage tube. The melt in the crucible body can be discharged outwards through the drainage pipe, so that the melt in the crucible body does not need to be transferred into a tundish in a pouring mode. The effect of continuously smelting metal raw materials is achieved by continuously feeding materials into the crucible body, continuously heating by the induction heating coil, continuously generating molten liquid and continuously conveying the molten liquid to the tundish through the drainage pipe. And moreover, the bent section is arranged in the induction coil, so that the drainage tube can be avoided, the coil of the induction coil can be uniformly distributed, and the smelting effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting equipment technology, specifically to a heating structure for a medium-frequency furnace and a medium-frequency smelting furnace. Background Technology

[0002] Currently, most smelting crucibles employ a tilting, top-edge-opening method for pouring molten metal. The crucible's top edge is open, and a flow channel is constructed using sealing material. Then, a hydraulic or electric tilting device tilts the furnace body, allowing the molten metal to flow into the tundish crucible through the flow channel. The metal material inside the smelting crucible is typically heated by an induction coil located outside the crucible. This utilizes electromagnetic induction to generate eddy currents within the heated material, and the energy of these eddy currents achieves the heating purpose.

[0003] The existing smelting crucible can only smelt one batch, pour out the molten liquid, add another batch of raw materials, reheat, and then smelt again, which cannot achieve continuous smelting. Utility Model Content

[0004] To address the aforementioned deficiencies, the technical problem to be solved by this utility model is to provide a heating structure and a medium-frequency melting furnace for a medium-frequency furnace, wherein the heating structure can continuously melt metal raw materials to achieve the effect of continuous melting.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] On the one hand, a heating structure for an intermediate frequency furnace is provided, including a crucible body, a drain pipe connected to the lower side of the crucible body, an induction coil provided outside the crucible body, the induction coil having a plurality of turns, and the coil of the induction coil adjacent to the drain pipe having a curved section for avoiding the drain pipe.

[0007] By adopting the above scheme, the molten metal inside the crucible can be discharged outward through the drain pipe, eliminating the need to transfer it to the tundish by pouring. Through continuous feeding into the crucible, continuous heating by the induction heating coil, and continuous molten metal generation, which is then continuously transported to the tundish through the drain pipe, the effect of continuous smelting of metal raw materials is achieved. Furthermore, because the induction coil has a bent section that avoids the drain pipe, and the coil itself is more evenly distributed, the smelting effect is guaranteed.

[0008] The present invention is further configured such that both the upper and lower turns of the induction coil adjacent to the drainage tube are provided with bent sections. Since both the upper and lower turns of the coil adjacent to the drainage tube are provided with bent sections, one bent section avoids the drainage tube from the upper side, and the other bent section avoids the drainage tube from the lower side. This reduces the degree of bending of a single bent section, thereby making the overall distribution of the induction coil more uniform.

[0009] The present invention is further configured such that the curved section includes a first arc-shaped section, a connecting section, and a second arc-shaped section connected in sequence. The first arc-shaped section and the second arc-shaped section are respectively disposed on the left and right sides of the drainage tube, and the outer sides of both the first arc-shaped section and the second arc-shaped section face the drainage tube. By having the outer sides of the first arc-shaped section and the second arc-shaped section face the drainage tube, the first arc-shaped section, the second arc-shaped section, and the connecting section can all avoid the drainage tube, and the curved section can be distributed relatively evenly around the drainage tube.

[0010] The present invention is further configured such that the connecting segment is a straight segment. Because the connecting segment is a straight segment, the distance between the connecting segment and the adjacent coils in the induction coil is larger, thereby preventing the connecting segment from affecting the adjacent coils.

[0011] The present invention is further configured such that several turns of the induction coil, arranged sequentially adjacent to each other along the direction away from the drain pipe, are provided with bent sections. Because several turns of the induction coil are provided with bent sections, the distribution of the induction coil is more uniform, thereby ensuring melting efficiency.

[0012] The present invention is further configured such that the length of the connecting segment gradually increases along the direction away from the drainage tube, and both the first arc segment and the second arc segment gradually shorten. Because the length of the connecting segment gradually increases along the direction away from the drainage tube, and both the first arc segment and the second arc segment gradually shorten, the connecting segment gradually tends to be parallel to the coil without the curved section, resulting in a more uniform distribution of the turns of the induction coil.

[0013] The present invention is further configured such that the induction coil is a water-cooled copper coil. Water-cooled copper coils have good conductivity and stability under high-temperature environments, enabling them to meet the requirements of long-term stable operation at 150KW high power.

[0014] The present invention is further configured such that the induction coil is made of a rectangular copper tube. The rectangular copper tube has a larger heat dissipation area, which is beneficial to the heat dissipation of the coil.

[0015] On the other hand, a medium-frequency melting furnace is also provided, including the heating structure for a medium-frequency furnace described above.

[0016] In summary, the heating structure and medium-frequency melting furnace provided by this utility model have at least the following beneficial effects:

[0017] 1. The heating structure enables continuous melting of metal raw materials.

[0018] 2. The induction coil can be adapted to the position of the guide tube, and the induction coil can be evenly distributed, improving the melting efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any novel effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the curved section of this utility model.

[0022] The reference numerals in the attached drawings include: crucible body 1, induction coil 2, bending section 3, first arc section 301, connecting section 302, second arc section 303, drain pipe 4, and control valve 5. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the following description is provided in conjunction with the appendix. Figure 1-2 The present invention will be further described in detail below with reference to specific embodiments.

[0024] Please see Figure 1-2 This embodiment provides a heating structure for a medium-frequency furnace, including a crucible body 1, a drain pipe 4 connected to the lower side of the crucible body, and an induction coil 2 disposed outside the crucible body 1. The induction coil 2 has several turns of coil, and the coil of the induction coil 2 adjacent to the drain pipe 4 is provided with a bent section 3 for avoiding the drain pipe 4, and there is a gap between the bent section 3 and the drain pipe 4.

[0025] By adopting the above scheme, the molten metal inside the crucible body 1 can be discharged outward through the drain pipe 4, eliminating the need to transfer the molten metal inside the crucible body to the tundish by pouring. Through continuous feeding into the crucible body 1, the induction heating coil continuously heats the metal, generating molten metal continuously, which is then continuously transported to the tundish through the drain pipe 4, achieving the effect of continuous smelting of metal raw materials. Furthermore, because the coil in the induction coil 2 has a bent section 3, it can avoid the drain pipe 4, allowing for a more uniform distribution of the coils and ensuring a better smelting effect. To facilitate control of the molten metal discharge from the drain pipe 4, a control valve 5 can be installed on the drain pipe 4 to control the flow and closure within the drain pipe 4.

[0026] Please see Figure 2 In order to ensure that the coils of the induction coil 2 are evenly distributed, it is preferable that the upper and lower turns of the coils adjacent to the drainage tube 4 are provided with bending sections 3. The bending section 3 located on the upper side of the drainage tube 4 is arranged opposite to the bending section 3 located on the lower side of the drainage tube 4.

[0027] Please see Figure 2 In some embodiments, the curved section 3 includes a first arc-shaped section 301, a connecting section 302, and a second arc-shaped section 303 connected in sequence. The first arc-shaped section 301 and the second arc-shaped section 303 are respectively disposed on the left and right sides of the drainage tube 4. The outer sides of the first arc-shaped section 301 and the second arc-shaped section 303 both face the drainage tube 4, that is, the outer arc sides of the first arc-shaped section 301 and the second arc-shaped section 303 face the drainage tube 4. Among them, the connecting section 302 is preferably a straight section.

[0028] Please see Figure 2 In the induction coil 2, several turns of the coil, arranged sequentially away from the drainage tube 4, are provided with curved sections 3. Along the direction away from the drainage tube 4, the length of the connecting section 302 gradually increases, and the first arc-shaped section 301 and the second arc-shaped section 303 gradually shorten. Specifically, in this embodiment, four consecutive turns of the coil on the upper side of the drainage tube 4 are provided with curved sections 3, and two consecutive turns of the coil on the lower side of the drainage tube 4 are provided with curved sections 3.

[0029] Preferably, the induction coil 2 is a water-cooled copper coil as used in the prior art. Specifically, the induction coil 2 can be a water-cooled copper coil made of a rectangular copper tube as used in the prior art.

[0030] In addition, based on the same inventive concept, this utility model also provides a medium-frequency melting furnace, including the heating structure for a medium-frequency furnace described above.

[0031] It should be noted that words indicating direction in this article, such as "up" and "down," are all in the format of "upper" and "lower." Figure 1 The direction setting is for ease of description only and has no other specific meaning.

[0032] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0033] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A heating structure for a medium-frequency furnace, comprising a crucible body (1), characterized in that, The crucible body has a drain pipe (4) connected to the side of the lower part. An induction coil (2) is provided outside the crucible body (1). The induction coil (2) has several turns of coil. The coil of the induction coil (2) adjacent to the drain pipe (4) has a bent section (3) for avoiding the drain pipe (4).

2. The heating structure for an intermediate frequency furnace as described in claim 1, characterized in that, The upper and lower turns of the induction coil (2) adjacent to the drainage tube (4) are both provided with a bent section (3).

3. The heating structure for a medium-frequency furnace as described in claim 1, characterized in that, The curved section (3) includes a first arc-shaped section (301), a connecting section (302), and a second arc-shaped section (303) connected in sequence. The first arc-shaped section (301) and the second arc-shaped section (303) are respectively located on the left and right sides of the drainage tube (4). The outer sides of the first arc-shaped section (301) and the second arc-shaped section (303) both face the drainage tube (4).

4. The heating structure for a medium-frequency furnace as described in claim 3, characterized in that, The connecting segment (302) is a straight line segment.

5. The heating structure for an intermediate frequency furnace as described in claim 4, characterized in that, In the induction coil (2), several turns of the coil are arranged in a direction away from the drain tube (4), and each coil has a bent section (3).

6. The heating structure for an intermediate frequency furnace as described in claim 5, characterized in that, Along the direction away from the drainage tube (4), the length of the connecting segment (302) gradually increases, and both the first arc segment (301) and the second arc segment (303) gradually shorten.

7. A heating structure for a medium-frequency furnace as described in any one of claims 1-6, characterized in that, The induction coil (2) is a water-cooled copper coil.

8. The heating structure for a medium-frequency furnace as described in claim 7, characterized in that, The induction coil (2) is made of a rectangular copper tube.

9. A medium-frequency induction melting furnace, characterized in that, Including the heating structure for an intermediate frequency furnace as described in any one of claims 1-8.

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