A high-efficiency water-circulating medium-frequency steel shell furnace

Abstract

This utility model discloses a high-efficiency water-circulating medium-frequency steel shell furnace, comprising an inner shell and an outer shell forming a cooling chamber. The inner shell houses a crucible and an induction coil, with a discharge pipe at the top of the crucible. A gate plate inside the pipe is controlled by a rotating rod and a linkage assembly. A circulating cooling assembly is located on the outer side of the outer shell. The linkage assembly includes gears and an arc-shaped rack, while the circulating cooling assembly consists of a circulating pump and a water tank. A mounting frame is hinged to a hydraulic cylinder, and the top of the outer shell has first and second hinge seats. Torsion springs are fitted at both ends of the rotating rod. This steel shell furnace improves cooling efficiency and extends equipment life through closed-loop water circulation cooling, automates discharge using hydraulic tilting and mechanical linkage, and improves heating efficiency through medium-frequency induction heating, making it suitable for precision casting and other fields.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting and processing technology, and in particular to a high-efficiency water-circulating medium-frequency steel shell furnace. Background Technology

[0002] In the field of metal smelting and processing, medium-frequency steel shell furnaces are widely used in production scenarios such as special alloy preparation and precision casting due to their advantages such as fast heating speed and precise temperature control. Traditional medium-frequency steel shell furnaces mostly use induction coils for direct heating. However, this heating method has the problem of significant energy loss, with some heat dissipating into the surrounding environment, making it difficult to improve heating efficiency. This increases production costs and restricts the economic benefits of the metal smelting industry.

[0003] As a crucial guarantee for the stable operation of medium-frequency steel shell furnaces, the cooling system in existing equipment often adopts open cooling or simple air-cooling systems. Open cooling easily leads to the cooling water coming into contact with the outside environment, producing scale and impurities, which not only reduces the cooling effect but also shortens the service life of the equipment. Air-cooling systems, on the other hand, have the problem of low heat dissipation efficiency, making it difficult to meet the heat dissipation requirements of the furnace body under long-term, high-intensity operation, which can easily lead to equipment overheating failures and affect the continuity of production.

[0004] Furthermore, the discharge operation of traditional medium-frequency steel shell furnaces typically relies on manual control or relatively simple mechanical structures. Manual operation is not only inefficient but also poses significant safety hazards in high-temperature environments; simple mechanical structures make it difficult to precisely control the discharge speed and flow rate, resulting in uneven discharge, affecting the quality stability of metal products, and failing to meet the high-precision and automation requirements of modern industrial production. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-efficiency water-circulating medium-frequency steel shell furnace.

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

[0007] A high-efficiency water-circulating medium-frequency steel shell furnace includes an inner shell, an outer shell, a cooling chamber for medium flow formed between the inner wall of the outer shell and the outer wall of the inner shell, a crucible inside the inner shell, an induction coil outside the crucible, a discharge pipe at the top of the crucible, a gate inside the discharge pipe, a rotating rod inserted laterally into the gate, mounting brackets symmetrically arranged on both sides of the outer shell, a top cover hinged to the top of the inner shell, linkage components for controlling the rotation of the gate at both ends of the rotating rod, and a circulating cooling component for reducing the furnace temperature on the outer side of the outer shell.

[0008] The above technical solution involves: an outer shell surrounding the inner shell, forming a cooling chamber between them; the cooling medium can carry away the furnace heat, improving cooling efficiency and ensuring stable equipment operation; a crucible and induction coil are installed inside the inner shell, enabling electromagnetic induction heating of metal materials with rapid heating and precise temperature control; a discharge pipe and gate are installed on the top of the crucible, which, together with a rotating rod and linkage components, enables automated control of discharge, improving discharge efficiency and safety; a circulating cooling component is installed on the outside of the outer shell, which can reduce the furnace temperature through circulating cooling medium, preventing overheating of the equipment.

[0009] Preferably, the linkage assembly includes gears at both ends of the rotating rod, the ends of the gears are provided with arc-shaped racks, the inner ring surface of the arc-shaped racks is provided with teeth for meshing with the gears, and the arc-shaped racks are fixed to the side wall of the mounting bracket.

[0010] The above technical solution involves gears at both ends of the rotating rod, which mesh with an arc-shaped rack fixed to the side wall of the mounting frame. When the furnace body tilts, the arc-shaped rack drives the gears to rotate, which in turn drives the rotating rod and the gate to rotate, thus realizing the automatic opening and closing of the gate without manual operation, thereby improving the automation and accuracy of material discharge.

[0011] Preferably, the circulating cooling assembly includes a circulating pump located on the outside of the outer casing, the circulating pump being connected to a water tank, and the circulating pump also being connected to a cooling chamber.

[0012] The above technical solution involves a circulating cooling component consisting of a circulating pump, a water tank, and a connection to a cooling chamber. The circulating pump pumps cooling water from the water tank into the cooling chamber, where it absorbs heat and then returns to the water tank for cooling, forming a closed-loop system. This prevents the cooling water from coming into contact with the outside environment, thus avoiding the formation of scale and impurities, improving the cooling effect, and extending the service life of the equipment.

[0013] Furthermore, hydraulic cylinders are hinged to the side walls of the mounting frame, and the hydraulic rods at the top of the hydraulic cylinders are hinged to first hinge seats, which are respectively fixed to both ends of the top of the outer shell.

[0014] The above technical solution involves mounting a hydraulic cylinder hinged to the side wall of the mounting frame. The hydraulic cylinder's top hydraulic rod is hinged and fixed to the first hinge seat on the top of the outer shell. The extension and retraction of the hydraulic cylinder can drive the furnace body to tilt, thereby adjusting the furnace body angle during material discharge. The hydraulic system can provide stable power to ensure the smoothness of the tilting process.

[0015] Furthermore, the top of the outer casing is provided with second hinge seats at both ends away from the first hinge seat, and each of the second hinge seats is hinged to the adjacent mounting bracket.

[0016] The above technical solution involves a second hinge seat at the top of the outer shell, which is hinged to the mounting frame. Together with the first hinge seat, the hydraulic cylinder, and the mounting frame, they form a four-bar linkage mechanism, which enhances the stability of the furnace body when tilting, ensures the balance of the furnace body during tilting, and prevents it from tipping over.

[0017] Preferably, torsion springs are fitted at both ends of the rotating rod.

[0018] The above technical solution involves installing torsion springs at both ends of the rotating rod. When the furnace body is reset, the torsion springs can provide a restoring torque, causing the gate to automatically close and seal the discharge port. At the same time, they provide damping force during the opening and closing of the gate, reducing impact, noise, and shortening the gate's action response time.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. A cooling chamber is formed between the outer shell and the inner shell, which, together with a circulating pump and a water tank, forms a closed-loop cooling system. This prevents the cooling water from coming into contact with the outside environment and generating scale and impurities, effectively improving the cooling effect and extending the service life of the equipment.

[0021] 2. The gate in the discharge pipe is connected to the gear-arc rack linkage assembly via a rotating rod. When the furnace body tilts, the gate can be opened automatically. When resetting, the torsion spring makes the gate close automatically, realizing automated control of discharge. At the same time, the hydraulic system can adjust the tilting speed and precisely control the discharge process.

[0022] 3. An induction coil is installed outside the crucible. After being connected to a medium-frequency power supply, it generates eddy currents through electromagnetic induction to heat the metal material. It utilizes the "skin effect" to achieve efficient heating, with low energy consumption and precise temperature control, making it suitable for melting various metals.

[0023] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a high-efficiency water-circulating medium-frequency steel shell furnace proposed in this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of a high-efficiency water-circulating medium-frequency steel shell furnace proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of a high-efficiency water-circulating medium-frequency steel shell furnace proposed in this utility model;

[0027] Figure 4This utility model proposes a high-efficiency water-circulating medium-frequency steel shell furnace. Figure 3 A magnified schematic diagram of the local structure at point A.

[0028] In the diagram: 1. Inner shell; 2. Outer shell; 3. Cooling chamber; 4. Crucible; 5. Induction coil; 6. Top cover; 8. Mounting bracket; 9. Hydraulic cylinder; 10. First hinge seat; 11. Second hinge seat; 12. Discharge pipe; 13. Gate; 14. Rotating rod; 15. Gear; 16. Arc rack; 17. Torsion spring; 18. Circulating pump; 19. Water tank. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Example 1, referring to Figures 1 to 4 A high-efficiency water-circulating medium-frequency steel shell furnace includes an inner shell 1, an outer shell 2 fitted outside the inner shell 1, a cooling chamber 3 for medium flow formed between the inner wall of the outer shell 2 and the outer wall of the inner shell 1, a crucible 4 inside the inner shell 1, an induction coil 5 fitted outside the crucible 4, a discharge pipe 12 at the top of the crucible 4, a gate 13 inside the discharge pipe 12, a rotating rod 14 inserted laterally into the gate 13, mounting brackets 8 symmetrically provided on both sides of the outer shell 2, a top cover 6 hinged to the top of the inner shell 1, linkage components for controlling the rotation of the gate 13 at both ends of the rotating rod 14, and a circulating cooling component for reducing the furnace temperature on the outer side of the outer shell 2.

[0031] In this embodiment, the linkage component includes gears 15 located at both ends of the rotating rod 14. The ends of the gears 15 are provided with arc-shaped racks 16. The inner ring surface of the arc-shaped racks 16 is provided with teeth for meshing with the gears 15. The arc-shaped racks 16 are fixed to the side wall of the mounting frame 8. The circulating cooling component includes a circulating pump 18 located on the outside of the outer shell 2. The circulating pump 18 is connected to a water tank 19 and is also connected to a cooling chamber 3. Hydraulic cylinders 9 are hinged to the side walls of the mounting frame 8. The hydraulic rods at the top of the hydraulic cylinders 9 are hinged to first hinge seats 10. The first hinge seats 10 are fixed to both ends of the top of the outer shell 2. Second hinge seats 11 are provided at both ends of the top of the outer shell 2 away from the first hinge seats 10. The second hinge seats 11 are hinged to the adjacent mounting frames 8. Torsion springs 17 are sleeved at both ends of the rotating rod 14.

[0032] The working principle of this embodiment:

[0033] An induction coil 5, fitted around the outside of the crucible 4, is connected to an intermediate frequency power supply. The intermediate frequency power supply rectifies the three-phase alternating current into direct current, and then inverts it into 100-10000Hz intermediate frequency alternating current, which generates a high-frequency alternating magnetic field through the induction coil. Eddy currents are generated in the crucible and metal material placed inside the coil due to electromagnetic induction. These eddy currents are converted into Joule heat by the internal resistance of the metal, causing the metal to melt rapidly.

[0034] The magnetic field of the induction coil penetrates the crucible wall and acts directly on the metal material, achieving "skin effect" heating. This heating method is characterized by high efficiency, low energy consumption, and precise temperature control, making it suitable for melting various metals.

[0035] The cooling chamber 3 between the outer shell 2 and the inner shell 1 forms an annular water channel. The circulating pump 18 pressurizes the cooling water in the water tank 19 and sends it into the cooling chamber. After absorbing the heat of the furnace body, the water returns to the water tank for cooling. This closed-loop circulation system avoids the cooling water from contacting the outside environment, preventing scaling and corrosion. At the same time, it accelerates cooling through heat exchangers or electronic cooling plates to ensure cooling efficiency.

[0036] Cooling water flows over the surface of the induction coil, keeping the coil temperature within a safe range and preventing the insulation material from aging. Simultaneously, the cooling chamber cools the furnace shell as a whole, preventing high temperatures from being conducted to external structures and extending the equipment's lifespan.

[0037] The gate 13 inside the discharge pipe 12 is connected to the gear-arc rack linkage assembly via the rotating rod 14. When the furnace body tilts, the arc rack 16 on the mounting bracket 8 rotates synchronously with the furnace body, driving the gears 15 at both ends of the rotating rod to rotate, causing the gate to flip and open around the axis of the rotating rod. When the furnace body returns to its original position, the torsion spring 17 provides a restoring torque, causing the gate to automatically close and seal the discharge port.

[0038] The hydraulic cylinder 9 forms a four-bar linkage with the outer shell and mounting bracket via the first hinge seat 10 and the second hinge seat 11. When the hydraulic cylinder piston rod extends, the mounting bracket rotates around the second hinge seat, allowing the furnace body to tilt at an angle of 30°-60°. Simultaneously, the opening of the gate is precisely controlled via gear-rack linkage. The hydraulic system is equipped with a displacement sensor and a proportional valve, enabling stepless adjustment of the tilting speed and ensuring a smooth and controllable discharge process.

[0039] Mounting bracket 8 is hinged to the top of the outer shell via the second hinge seat 11, forming a stable rotation fulcrum. Hydraulic cylinder 9, acting as the main power source, cooperates with the first hinge seat 10 to provide dynamic balance during tilting, preventing the furnace from tipping over. This design can withstand the weight of the furnace when fully loaded.

[0040] The torsion springs 17 at both ends of the lever 14 provide damping force during the opening and closing of the gate: when the gate is opened, the spring absorbs kinetic energy to reduce the impact; when closed, it releases energy to assist in reset, shortening the gate's action response time to 0.3-0.5 seconds, while also reducing noise.

[0041] With the top cover 6 closed, the intermediate frequency power supply is activated, and the metal material melts inside the crucible. The cooling system continues to operate, controlling the furnace surface temperature to ≤100℃.

[0042] The hydraulic cylinder 9 tilts the furnace body 45°, and the gear-rack linkage drives the gate 13 to fully open, allowing molten metal to flow into the mold through the discharge pipe. The discharge time is controlled by a hydraulic flow regulating valve, typically 20-40 seconds.

[0043] The hydraulic cylinder retracts, the furnace body returns to its original position, and the torsion spring drives the gate to close. The cooling system continues to run for 10-15 minutes until the furnace body temperature drops below 200℃, then begins the next cycle.

[0044] This design achieves significant optimization of melting efficiency and automation through the synergistic effect of medium-frequency induction heating, closed-loop water cooling, hydraulic tilting, and mechanical linkage, and is suitable for fields such as precision casting and special alloy preparation.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency water-circulating medium-frequency steel shell furnace, comprising an inner shell (1), wherein an outer shell (2) is fitted over the inner shell (1), characterized in that, A cooling chamber (3) for medium flow is formed between the inner wall of the outer shell (2) and the outer wall of the inner shell (1). A crucible (4) is provided inside the inner shell (1). An induction coil (5) is sleeved on the outside of the crucible (4). A discharge pipe (12) is provided on the top of the crucible (4). A gate (13) is provided inside the discharge pipe (12). A rotating rod (14) is inserted horizontally on the gate (13). Mounting brackets (8) are symmetrically provided on both sides of the outer shell (2). A top cover (6) is hinged to the top of the inner shell (1). Both ends of the rotating rod (14) are provided with linkage components for controlling the rotation of the gate (13). A circulating cooling component for reducing the furnace temperature is provided on the outside of the outer shell (2).

2. The high-efficiency water-circulating medium-frequency steel shell furnace according to claim 1, characterized in that, The linkage assembly includes gears (15) located at both ends of the rotating rod (14). The ends of the gears (15) are provided with arc-shaped racks (16). The inner ring surface of the arc-shaped racks (16) is provided with teeth for meshing with the gears (15). The arc-shaped racks (16) are fixed to the side wall of the mounting bracket (8).

3. The high-efficiency water-circulating medium-frequency steel shell furnace according to claim 2, characterized in that, The circulating cooling assembly includes a circulating pump (18) located outside the outer shell (2), the circulating pump (18) being connected to a water tank (19), and the circulating pump (18) also being connected to a cooling chamber (3).

4. The high-efficiency water-circulating medium-frequency steel shell furnace according to claim 3, characterized in that, Hydraulic cylinders (9) are hinged to the side walls of the mounting bracket (8), and the hydraulic rod at the top of the hydraulic cylinder (9) is hinged to a first hinge seat (10). The first hinge seat (10) is fixed to both ends of the top of the outer shell (2).

5. A high-efficiency water-circulating medium-frequency steel shell furnace according to claim 4, characterized in that, The top of the outer shell (2) is provided with second hinge seats (11) at both ends away from the first hinge seat (10), and the second hinge seats (11) are respectively hinged to the adjacent mounting bracket (8).

6. A high-efficiency water-circulating medium-frequency steel shell furnace according to claim 5, characterized in that, Both ends of the rotating rod (14) are fitted with torsion springs.

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