Kettle-shaped induction melting heat preservation casting furnace

Abstract

A pot-shaped induction melting heat preservation casting furnace relates to the technical field of induction furnaces and comprises a furnace body, a pot-shaped lining and an induction coil assembly. The interior of the furnace body is of a cavity structure, the kettle-shaped lining is arranged in the furnace body, and one side of the kettle-shaped lining extends out of a flow guide part; the induction coil assembly is installed in a cavity between the kettle-shaped lining and the furnace body and comprises a spirally-wound hollow coil and a plurality of magnet yokes, and the magnet yokes are arranged on the outer side of the hollow coil and used for preventing magnetic leakage and improving the heating efficiency; according to the utility model, direct casting is carried out through the flow guide part of the kettle-shaped lining, an intermediate transfer ladle is not needed, the energy consumption loss is reduced, and the production cost is reduced; the induction coil assembly is matched with the magnet yoke through the spirally-wound hollow coil, magnetic leakage is effectively prevented, meanwhile, it is ensured that the temperature stability of a metal solution is kept in the casting process of the flow guide part through the addition of the magnetic conductive block or the magnetic conductive powder, and the casting quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of induction furnace technology, and in particular to a pot-shaped induction melting and holding casting furnace. Background Technology

[0002] A medium-frequency induction furnace is a specialized piece of equipment designed based on electromagnetic theory. Widely used in the foundry industry, it is an indispensable piece of equipment in industrial production. Its working principle involves converting three-phase AC power into DC power through a rectifier, and then using an inverter circuit to convert the DC power into an adjustable medium-frequency current, which is supplied to the induction coil. When the medium-frequency current flows through the induction coil, it generates high-density magnetic lines of force within it. These lines of force penetrate the metal material placed inside the induction coil, inducing eddy currents. These eddy currents circulate within the metal material, and due to the resistive properties of the metal, electrical energy is converted into heat energy, causing the metal to gradually heat up and melt, thus meeting the requirements for smelting, heat preservation, and composition control.

[0003] Based on their structural characteristics, medium-frequency induction furnaces can be divided into two types: cored induction furnaces and coreless induction furnaces. In actual industrial production, coreless induction furnaces are widely used for metal melting and heat preservation due to their flexibility and high efficiency. Their core mechanism utilizes the principle of electromagnetic induction to generate eddy current circulation within the metal material, achieving rapid heating and melting.

[0004] However, some limitations still exist in existing technologies. The guide nozzle of a traditional medium-frequency coreless induction furnace is located at the top of the furnace body, making it difficult to control the parabolic trajectory of molten steel during pouring. Therefore, a multi-stage operation mode is typically adopted, consisting of a melting furnace, intermediate transfer ladles, and casting ladles. Although this mode can meet basic smelting requirements, the presence of intermediate transfer links significantly increases energy loss, leading to higher production costs. This problem has become a pressing technical challenge for industry technicians. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a pot-shaped induction melting and holding furnace.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] A pot-shaped induction melting and holding furnace includes:

[0008] The furnace body has a hollow internal structure;

[0009] A pot-shaped liner is installed inside the furnace body, and a guide section is provided on one side extending from the bottom to the top of the pot-shaped liner;

[0010] The kettle-shaped induction coil assembly is installed in the cavity between the kettle-shaped inner lining and the furnace body;

[0011] The pot-shaped induction coil assembly includes:

[0012] A hollow coil is spirally wound into a pot-shaped structure that corresponds to and fits the pot-shaped liner. One end of the hollow coil is the cooling water inlet, and the other end is the water outlet.

[0013] Magnetic yokes, multiple magnetic yokes are arranged at intervals around the outside of the hollow coil to prevent magnetic leakage.

[0014] Preferably, the hollow coil is provided with a fixed bracket.

[0015] Preferably, the outer side of the hollow coil current-conducting portion is inlaid with a magnetically conductive block for increasing the magnetic field density, or the coil gap in the corresponding part is filled with refractory castable mixed with magnetically conductive powder.

[0016] Preferably, the bottom of the furnace body is located on a base, with a shaft groove plate on one side and a hanging shaft on the other side.

[0017] Preferably, the furnace body is hinged to a furnace cover at the top.

[0018] Preferably, the furnace body is provided with a protective plate at the position corresponding to the flow guide section of the kettle-shaped lining.

[0019] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0020] (1) The present invention has a simple structure. The guide part of the pot-shaped liner is directly used for casting without the need for intermediate transfer bags, which effectively reduces energy loss in intermediate links and lowers production costs. The pot-shaped liner is cast from neutral furnace lining material and is baked and sintered, which significantly improves its hot hardness and rigidity and extends its service life.

[0021] (2) The pot-shaped induction coil assembly of this utility model effectively prevents magnetic leakage and improves the efficiency of induction heating by cooperating with the spirally wound hollow coil and the magnetic yoke. At the same time, the addition of magnetic conductive blocks or magnetic conductive powder further enhances the magnetic field strength, ensuring that the flow guide maintains the temperature stability of the molten metal during the casting process and improving the casting quality.

[0022] (3) This utility model further enhances the structural stability of the induction coil through the design of the fixed bracket and the protective plate, adapts to different smelting needs, and further improves the versatility and economy of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the pot-shaped induction coil assembly;

[0025] Figure 3This is a top view of the pot-shaped induction coil assembly;

[0026] Figure 4 This is a schematic diagram of the structure of the pot-shaped inner lining;

[0027] Figure 5 This is a schematic diagram of the base structure.

[0028] In the diagram: 1. Furnace body; 2. Pot-shaped liner; 3. Pot-shaped induction coil assembly; 3-1. Hollow coil; 3-2. Magnetic yoke; 3-3. Fixed bracket; 4. Base; 5. Shaft groove plate; 6. Hanging shaft; 7. Furnace cover; 8. Protective plate. Detailed Implementation

[0029] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify 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.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Example 1:

[0033] Combined with appendix Figures 1-4 A pot-shaped induction melting and holding casting furnace includes a furnace body 1, a pot-shaped liner 2, and a pot-shaped induction coil assembly 3. The furnace body 1 serves as the outer protective shell of the entire device, with an internal cavity structure to house other core components. The pot-shaped liner 2 is installed inside the furnace body 1, and its main function is to melt metal materials. A flow guide is designed on one side of the pot-shaped liner 2, extending from the bottom to the top. (According to the attached...) Figure 4As shown, the shape of this guide section can effectively control the parabolic trajectory of the molten steel during casting, thus allowing it to be used directly in the casting process without the need for transfer via an tundish. This design effectively reduces energy loss in intermediate stages, significantly improves production efficiency, and lowers production costs.

[0034] Furthermore, the pot-shaped inner lining 2 is cast from neutral furnace lining material and then subjected to a baking and sintering process. This process significantly enhances the hot hardness and rigidity of the pot-shaped inner lining 2, enabling it to withstand the mechanical stress and thermal shock during high-temperature melting.

[0035] The kettle-shaped induction coil assembly 3 is installed in the cavity between the kettle-shaped liner 2 and the furnace body 1. The main function of the kettle-shaped induction coil assembly 3 is to induction heat the kettle-shaped liner 2, thereby achieving metal melting. In addition, the design of the kettle-shaped induction coil assembly 3 can tightly clamp the kettle-shaped liner 2, further improving its structural strength and ensuring stability during high-temperature operation.

[0036] The pot-shaped induction coil assembly 3 consists of a hollow coil 3-1 and a magnetic yoke 3-2. (See attached diagram) Figure 2 and 3 As shown, the hollow coil 3-1 is spirally wound, forming a pot-shaped structure that matches the shape of the pot-shaped liner 2, allowing it to fit snugly within the cavity between the pot-shaped liner 2 and the furnace body 1. One end of the hollow coil 3-1 is designed as the inlet for cooling circulating water, and the other end is the outlet. During the smelting process, cooling circulating water continuously flows through this system, effectively preventing damage to the hollow coil 3-1 due to high temperatures. Multiple magnetic yokes 3-2 are evenly spaced on the outer side of the hollow coil 3-1. The main function of the magnetic yokes 3-2 is to prevent magnetic field leakage, thereby significantly improving the efficiency of induction heating and ensuring maximum energy utilization.

[0037] Furthermore, a magnetically conductive block is embedded on the outer side of the flow-guiding portion of the hollow coil 3-1, or the corresponding area is filled with refractory castable mixed with magnetically conductive powder. The function of the magnetically conductive block or powder is to enhance the magnetic field strength, ensuring that the flow-guiding portion of the pot-shaped liner 2 can also obtain sufficient heat during induction heating. This design ensures the temperature stability of the molten metal flowing through the flow-guiding portion of the pot-shaped liner 2, thereby significantly improving the casting quality and avoiding defects caused by temperature fluctuations.

[0038] In addition, a fixed bracket 3-3 is provided on the outside of the hollow coil 3-1 to enhance its structural strength and ensure stability under high temperature and electromagnetic force. A protective plate 8 is installed on the furnace body 1 at the position corresponding to the flow guide of the pot-shaped liner 2. The main function of the protective plate 8 is to further enhance the structural strength of the flow guide and prevent damage caused by high temperature or mechanical stress, thereby extending the service life of the device.

[0039] Example 2:

[0040] Combined with appendix Figure 1 and 5 A pot-shaped induction melting and holding furnace is disclosed, differing from Embodiment 1 in that, in Embodiment 1, the bottom of the furnace body 1 is mounted on a base 4. One side of the base 4 is provided with a shaft groove plate 5, and the other side with a hanging shaft 6. During the tilting casting operation, the shaft groove plate 5 can be hung on the fixed shaft, and the tilting device pulls the hanging shaft 6 to control the tilt angle of the furnace body 1, thereby realizing the casting operation. The tilting device is a mature piece of equipment in the prior art, and its specific structure and working principle will not be described in detail in this embodiment.

[0041] The top of the furnace body 1 is connected to the furnace cover 7 via a hinge structure. During the charging stage, the furnace cover 7 can be opened to allow the metal raw materials to be fed into the pot-shaped liner 2. During the smelting process, the furnace cover 7 can be closed, thereby effectively reducing heat loss inside the pot-shaped liner 2 and ensuring the efficiency and stability of the smelting process.

[0042] The base 4 serves as the supporting structure for the entire device, providing a stable mounting foundation for the furnace body 1 and integrating the mounting interfaces for the shaft groove plate 5 and the hanging shaft 6. The design of the shaft groove plate 5 ensures that the furnace body 1 can be reliably fixed in a preset position when tilted, while the hanging shaft 6 is connected to the tilting device, achieving the tilting operation of the furnace body 1 through mechanical traction. This design significantly improves the convenience and safety of operation while reducing the need for manual intervention.

[0043] The tilting device is connected to the furnace body 1 via a lifting shaft 6. In actual operation, when casting is required, the operator only needs to hang the shaft groove plate 5 on the fixed shaft, then start the tilting device. The lifting shaft 6 is pulled to gradually tilt the furnace body 1 until the molten metal flows smoothly into the mold. This process is highly automated, easy to operate, and effectively reduces operational risks.

[0044] The furnace lid 7 is connected to the top of the furnace body 1 via a hinge structure, allowing it to be opened and closed vertically. During charging, the lid 7 can be fully opened, facilitating the operator to add metal raw materials into the pot-shaped lining 2. During smelting, the lid 7 closes to form a sealed structure, effectively reducing heat loss and ensuring the efficiency and stability of the smelting process. Furthermore, the design of the lid 7 also considers operational safety, avoiding the risk of accidental splashing of high-temperature molten metal during operation.

[0045] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art 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 regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A kettle-type induction melting holding and pouring furnace characterized by, The utility model relates to a kettle-shaped induction melting holding casting furnace, which comprises a furnace body (1) with a hollow structure inside, a kettle-shaped lining (2) arranged in the furnace body (1), a kettle-shaped induction coil assembly (3) installed in the hollow cavity between the kettle-shaped lining (2) and the furnace body (1), wherein the kettle-shaped induction coil assembly (3) comprises a hollow coil (3-1) spirally wound into a kettle-shaped structure corresponding to the kettle-shaped lining (2), one end of the hollow coil (3-1) being a cooling circulating water inlet end and the other end being a water outlet end, and a plurality of magnetic yokes (3-2) arranged at intervals outside the hollow coil (3-1) to prevent magnetic leakage.

2. The kettle-shaped induction melting holding casting furnace according to claim 1, wherein a fixed support (3-3) is arranged outside the hollow coil (3-1).

3. The kettle-shaped induction melting holding casting furnace according to claim 1, wherein a magnetic conducting block for improving the magnetic field density is inlaid outside the flow guide part of the hollow coil (3-1), or a refractory castable mixed with magnetic conducting powder is filled in the coil gap at the corresponding position.

4. The kettle-shaped induction melting holding casting furnace according to claim 1, wherein the bottom of the furnace body (1) is arranged on a base (4), one side of the base (4) is provided with an axle slot plate (5), and the other side is provided with a hanging shaft (6).

5. The kettle-shaped induction melting holding casting furnace according to claim 1, wherein the top of the furnace body (1) is hingedly connected with a furnace cover (7).

6. The kettle-shaped induction melting holding casting furnace according to claim 1, wherein the furnace body (1) is provided with a guard plate (8) at a position corresponding to the flow guide part of the kettle-shaped lining (2). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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