Furnace core heat insulation structure of graphite crucible

Abstract

The furnace core heat insulation structure comprises the graphite crucible, an inner container is arranged in the graphite crucible, a heat insulation frame is arranged between the graphite crucible and the inner container, an electric heating ring is arranged on the outer wall of the inner container in a sleeved mode, a heat insulation cavity is formed in the heat insulation frame, and a furnace core is arranged in the heat insulation cavity. An input pipe and an output pipe are symmetrically arranged on the two sides of the heat insulation frame, and the sides, away from each other, of the input pipe and the output pipe extend out of the graphite crucible to be connected with a temperature control assembly. The graphite crucible has the beneficial effects that by arranging the heat insulation frame and the temperature control assembly, heat insulation can be conducted on the electric heating ring on the inner container, waste heat is prevented from heating the graphite crucible shell in the electric heating process, and the safety of the graphite crucible is further improved; the temperature control assembly adjusts the circulation speed of cooling liquid in the heat insulation frame in real time through cooperation of a cooling box, a PLC, a conveying pipe, a backflow pipe, a conveying pump and a temperature sensor, the temperature of the cooling liquid is prevented from being too high, and the heat insulation effect of the cooling liquid is further improved.

Description

Technical Field

[0001] This utility model relates to the field of graphite crucible technology, and more specifically, to a furnace core insulation structure for a graphite crucible. Background Technology

[0002] Graphite crucibles are made primarily of natural flake graphite, using plastic refractory clay or carbonaceous materials as binders. They possess characteristics such as high temperature resistance, high thermal conductivity, good corrosion resistance, and long service life. During high-temperature use, they have a low coefficient of thermal expansion and exhibit certain resistance to strain from rapid cooling and heating. They also demonstrate strong resistance to acidic and alkaline solutions and excellent chemical stability, not participating in any chemical reactions during the smelting process. The smooth inner wall of the graphite crucible prevents molten metal from leaking or adhering to the inner wall, resulting in good fluidity and castability, making them suitable for casting in various molds. Due to these excellent properties, graphite crucibles are widely used in the smelting of alloy tool steels and non-ferrous metals and their alloys.

[0003] According to the furnace core insulation structure disclosed in Chinese Patent CN202323482249.4, the existing furnace core insulation structure uses inner and outer insulating sand layers fixedly installed on the inner and outer sides of the cooling tank. This not only concentrates the heat emitted by the electric heating ring on the outer side of the inner tank, but also prevents the high temperature generated by the inner insulating sand layer from heating the furnace and causing the outer wall temperature of the furnace to be too high. Simultaneously, it drives the fan inside the insulation mechanism to introduce a large amount of air into the cooling tank inside the furnace, allowing the heat remaining inside the cooling tank to be continuously discharged through the exhaust pipe. This effectively isolates the residual heat of the electric heating ring, preventing the outer wall temperature of the furnace from becoming too high and causing burns to the operator. However, existing furnace core insulation structures reduce the furnace temperature by dispersing hot air into the surrounding environment; however, the dispersal of high-temperature hot air into the surrounding environment can have adverse effects.

[0004] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a furnace core insulation structure for a graphite crucible to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A furnace core insulation structure for a graphite crucible includes a graphite crucible with an inner liner inside. A heat insulation frame is provided between the graphite crucible and the inner liner. An electric heating ring is fitted on the outer wall of the inner liner. A heat insulation cavity is formed in the heat insulation frame. An input pipe and an output pipe are symmetrically arranged on both sides of the heat insulation frame. The side of the input pipe and the output pipe that is far apart from each other extends to the outside of the graphite crucible and connects to a temperature control component.

[0008] Preferably, the graphite crucible has several evenly distributed support blocks at its bottom and a matching cover plate at its top, with a lifting ring at the top of the cover plate.

[0009] Preferably, the inner wall of the heat insulation frame is provided with a heat insulation sand layer.

[0010] Preferably, the graphite crucible has through holes on both sides that match the input pipe and the output pipe, respectively.

[0011] Preferably, the temperature control assembly includes a mounting base on the outer wall of the graphite crucible, a cooling box on one side of the mounting base, a delivery pipe on one side of the cooling box, a return pipe on the side of the cooling box away from the delivery pipe, the delivery pipe and the return pipe being connected to the input pipe and the output pipe respectively by bolts, a PLC controller on the side of the mounting base located in the cooling box, a delivery pump on the delivery pipe, and a temperature sensor in the heat insulation cavity.

[0012] Preferably, both the delivery pump and the temperature sensor are electrically connected to the PLC controller.

[0013] The beneficial effects of this utility model are as follows: by setting up a heat insulation frame and a temperature control component, the electric heating ring on the inner liner can be insulated to prevent residual heat from heating the outer shell of the graphite crucible during electric heating, thereby further improving its safety. The temperature control component, in conjunction with a cooling box, PLC controller, delivery pipe, return pipe, delivery pump and temperature sensor, adjusts the circulation speed of the coolant inside the heat insulation frame in real time to prevent the coolant temperature from being too high, thereby further improving its heat insulation effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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 creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a furnace core heat insulation structure for a graphite crucible according to an embodiment of the present utility model.

[0016] Figure 2 This is a front view of the furnace core heat insulation structure of a graphite crucible according to an embodiment of the present utility model;

[0017] Figure 3 This is a cross-sectional view of the furnace core heat insulation structure of a graphite crucible according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the heat insulation frame in the furnace core heat insulation structure of a graphite crucible according to an embodiment of the present utility model.

[0019] In the picture:

[0020] 1. Graphite crucible; 2. Inner liner; 3. Insulation rack; 4. Electric heating ring; 5. Insulation cavity; 6. Input pipe; 7. Output pipe; 8. Support block; 9. Cover plate; 10. Lifting ring; 11. Insulation sand layer; 12. Mounting base; 13. Cooling box; 14. Conveying pipe; 15. Return pipe; 16. Bolt; 17. PLC controller; 18. Conveying pump; 19. Temperature sensor. Detailed Implementation

[0021] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0022] According to an embodiment of the present invention, a furnace core insulation structure for a graphite crucible is provided.

[0023] Example 1;

[0024] like Figure 1-4 As shown, the furnace core insulation structure of the graphite crucible according to an embodiment of the present invention includes a graphite crucible 1, an inner liner 2 in the graphite crucible 1, a heat insulation frame 3 between the graphite crucible 1 and the inner liner 2, an electric heating ring 4 sleeved on the outer wall of the inner liner 2, a heat insulation cavity 5 opened in the heat insulation frame 3, and symmetrically arranged input pipes 6 and output pipes 7 on both sides of the heat insulation frame 3. The side of the input pipe 6 and the output pipe 7 that is far apart from each other extends to the outside of the graphite crucible 1 and connects to the temperature control component.

[0025] Example 2;

[0026] like Figure 1-4As shown, the device includes a graphite crucible 1, an inner liner 2, and a heat insulation frame 3 between the graphite crucible 1 and the inner liner 2. An electric heating ring 4 is fitted onto the outer wall of the inner liner 2. A heat insulation cavity 5 is formed within the heat insulation frame 3. An input pipe 6 and an output pipe 7 are symmetrically arranged on both sides of the heat insulation frame 3. The opposite sides of the input pipe 6 and the output pipe 7 extend to the outside of the graphite crucible 1 and connect to a temperature control component. Several evenly distributed support blocks 8 are provided at the bottom of the graphite crucible 1, and a matching cover plate 9 is provided at the top of the graphite crucible 1. A lifting ring 10 is provided at the top of the cover plate 9. A heat-insulating sand layer 11 is provided on the inner wall of the heat insulation frame 3. Through holes matching the input pipe 6 and the output pipe 7 are respectively formed on both sides of the graphite crucible 1. The temperature control assembly includes a mounting base 12 on the outer wall of the graphite crucible 1. A cooling box 13 is located on one side of the mounting base 12, and a delivery pipe 14 is located on one side of the cooling box 13. A return pipe 15 is located on the side of the cooling box 13 away from the delivery pipe 14. The delivery pipe 14 and the return pipe 15 are connected to the input pipe 6 and the output pipe 7 respectively by bolts 16. A PLC controller 17 is located on the side of the mounting base 12 located on the cooling box 13. A delivery pump 18 is located on the delivery pipe 14. A temperature sensor 19 is located in the heat insulation cavity 5. The delivery pump 18 and the temperature sensor 19 are both electrically connected to the PLC controller 17.

[0027] In practical applications, when the electric heating ring 4 heats the inner liner 2, it generates residual heat, which heats the heat insulation frame 3. During this process, the delivery pump 18 is activated to input the coolant in the cooling tank 13 into the heat insulation cavity 5 in the heat insulation frame 3 through the delivery pipe 14. The coolant cools the heat insulation frame 3, preventing it from conducting heat to the graphite crucible 1. Simultaneously, when the coolant flows into the heat insulation frame 3, it flows back to the cooling tank 13 through the return pipe 15, keeping the coolant in the heat insulation frame 3 in a flowing state and improving the cooling effect. The temperature sensor 19 monitors the temperature of the coolant in the heat insulation frame 3. When the coolant temperature exceeds a predetermined value, the temperature sensor 19 activates the automatic cooling system. The temperature sensor 19 sends information to the PLC controller 17, which adjusts the delivery efficiency of the delivery pump 18 to increase the circulation speed of the coolant in the heat insulation frame 3 and accelerate the cooling of the heat insulation frame 3. By setting up the heat insulation frame and temperature control components, the electric heating ring on the inner liner can be insulated to prevent residual heat from heating the outer shell of the graphite crucible during electric heating, thereby further improving its safety. The temperature control components, in conjunction with the cooling box, PLC controller, delivery pipe, return pipe, delivery pump and temperature sensor, adjust the circulation speed of the coolant inside the heat insulation frame in real time to prevent the coolant temperature from being too high and further improve its heat insulation effect.

[0028] In summary, by utilizing the above-mentioned technical solution of this utility model, the electric heating ring on the inner liner can be insulated by setting up a heat insulation frame and a temperature control component, preventing residual heat from heating the outer shell of the graphite crucible during electric heating, thereby further improving its safety. The temperature control component, through the cooperation of a cooling box, PLC controller, delivery pipe, return pipe, delivery pump, and temperature sensor, adjusts the circulation speed of the coolant inside the heat insulation frame in real time to prevent the coolant temperature from becoming too high, thereby further improving its heat insulation effect.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A furnace core insulation structure for a graphite crucible, characterized in that, The system includes a graphite crucible (1), an inner liner (2) inside the graphite crucible (1), a heat insulation frame (3) between the graphite crucible (1) and the inner liner (2), an electric heating ring (4) fitted on the outer wall of the inner liner (2), a heat insulation cavity (5) in the heat insulation frame (3), and symmetrically arranged input pipes (6) and output pipes (7) on both sides of the heat insulation frame (3). The opposite sides of the input pipes (6) and the output pipes (7) extend to the outside of the graphite crucible (1) and connect to the temperature control component.

2. The furnace core insulation structure of a graphite crucible according to claim 1, characterized in that, The graphite crucible (1) has several evenly distributed support blocks (8) at its bottom end, and a matching cover plate (9) is provided at the top end of the graphite crucible (1). The top end of the cover plate (9) is provided with a lifting ring (10).

3. The furnace core insulation structure of a graphite crucible according to claim 1, characterized in that, The inner wall of the heat insulation frame (3) is provided with a heat insulation sand layer (11).

4. The furnace core insulation structure of a graphite crucible according to claim 1, characterized in that, The graphite crucible (1) has through holes on both sides that match the input pipe (6) and the output pipe (7), respectively.

5. The furnace core insulation structure of a graphite crucible according to claim 1, characterized in that, The temperature control assembly includes a mounting base (12) on the outer wall of the graphite crucible (1), a cooling box (13) on one side of the mounting base (12), a conveying pipe (14) on one side of the cooling box (13), a return pipe (15) on the side of the cooling box (13) away from the conveying pipe (14), the conveying pipe (14) and the return pipe (15) are connected to the input pipe (6) and the output pipe (7) respectively by bolts (16), a PLC controller (17) is provided on the side of the mounting base (12) located on the cooling box (13), a conveying pump (18) is provided on the conveying pipe (14), and a temperature sensor (19) is provided in the heat insulation cavity (5).

6. The furnace core insulation structure of a graphite crucible according to claim 5, characterized in that, The delivery pump (18) and the temperature sensor (19) are both electrically connected to the PLC controller (17).

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