Large-tonnage bottom-mounted vacuum consumable skull furnace

Abstract

The utility model belongs to the field of vacuum metallurgical equipment, and particularly relates to a large-tonnage bottom-mounted vacuum consumable skull furnace. A mold and a heat preservation assembly of a traditional large-tonnage bottom-mounted vacuum self-consuming skull furnace are integrally designed, after casting is completed, the heat preservation assembly and a furnace body need to be disassembled, then the heat preservation assembly and the mold are transported out of a front furnace door of the furnace body through tools such as a forklift and are transported in and installed before being used next time, operation is inconvenient, and certain safety risks exist. In order to solve the problems, the large-tonnage bottom-mounted vacuum consumable skull furnace comprises a bottom frame, a lower platform is arranged above the bottom frame, a furnace body is arranged on the lower platform, a lower furnace door is arranged at the bottom of the furnace body, a mold support is arranged on one side in the lower furnace door, and a mold is arranged on the mold support. A heat preservation assembly is fixedly installed in the furnace body. The outward side of the lower furnace door is fixedly connected with a supporting block, and a plurality of lifting mechanisms used for driving the supporting block to move in the vertical direction are arranged between the bottom frame and the lower platform.

Description

Technical Field

[0001] The utility model belongs to the field of vacuum metallurgy equipment, and particularly relates to a large-tonnage bottom-loading vacuum consumable skull melting furnace. Background Art

[0002] As the basic industry of China's national economy, the traditional production process of the metal smelting industry encounters numerous obstacles in its sustainable development. With the development of the metal smelting industry, higher requirements are put forward for the scale, output, and product quality of smelting equipment. Vacuum metallurgy can realize metallurgical processes that cannot be carried out in the atmosphere, prevent metal oxidation, separate substances with different boiling points, remove gases or impurities in metals, enhance the deoxidation ability of carbon in metals, and effectively improve the quality of metals or alloys. Therefore, in recent years, more and more vacuum smelting equipment has been put into use in China.

[0003] The vacuum skull melting furnace (Vacuum arc furnace) is a modified equipment of the vacuum arc remelting furnace, also known as the vacuum arc skull melting furnace. It utilizes the melting conditions of the vacuum arc furnace, adopts a tilting shallow-bottom water-cooled crucible, and controls the cooling water volume to form a thin layer of "skull" on the inner wall of the crucible for the molten metal to be smelted, separating the molten metal liquid from the crucible, thus avoiding the contamination of the active metal liquid by the crucible. Moreover, a relatively large molten pool can be formed. At the end of melting, the tongs are quickly tilted to pour the molten metal into the ingot mold or casting for solidification. The vacuum skull melting furnace overcomes the disadvantages of the vacuum arc furnace that cannot be cast and the vacuum induction furnace that has a refractory material crucible to contaminate the active metal, and integrates the advantages of both to form a vacuum electric furnace.

[0004] Currently, the molds, crystallizers, and heat preservation components of the vacuum skull melting furnace are all taken out from the front furnace door. Each time the furnace is emptied, the heat preservation components need to be removed from the furnace body, increasing the failure probability of the heat preservation equipment. And each time before and after melting, equipment such as forklifts is required to load and unload relevant components. For large-tonnage skull melting furnaces, it is very inconvenient to operate, and at the same time, it increases the safety hazards for operators. Content of the Utility Model

[0005] The utility model provides a large-tonnage bottom-loading vacuum skull melting furnace. The heat preservation components of the vacuum skull melting furnace are fixed inside the furnace body. After casting is completed, the mold can be separated from the heat preservation components, and then the mold and the lower furnace door are transported out of the furnace body together without removing the heat preservation components, which is convenient for taking out the ingot and maintenance and cleaning, and improves the equipment utilization efficiency.

[0006] To achieve the above object, the utility model adopts the following technical solutions, including a chassis, a lower platform is arranged above the chassis, a furnace body is arranged on the lower platform, a front furnace opening is arranged on the upper side of the furnace body, a front furnace door is arranged at the front furnace opening, a lower furnace opening is arranged at the bottom of the furnace body, a lower furnace door is arranged at the lower furnace opening, a mold support is arranged on the side of the lower furnace door facing the inside of the furnace body, a mold is arranged on the mold support, a heat preservation component is fixedly installed inside the furnace body, and the position of the heat preservation component corresponds to the position of the mold; a support block is fixedly connected to the side of the lower furnace door facing the outside of the furnace body, and a plurality of lifting mechanisms for driving the support block to move in the vertical direction are arranged between the chassis and the lower platform.

[0007] As a preferred solution of the utility model, the lower furnace door is locked at the lower furnace opening at the bottom of the furnace body through a lock ring.

[0008] As another preferred solution of the utility model, the lifting mechanism includes a lifting motor arranged on the chassis, the output shaft of the lifting motor is connected with a vertically arranged lead screw, one end of the lead screw far away from the lifting motor is connected with a bearing seat arranged at the bottom of the lower platform, a lifting block is arranged on the lead screw through a lead screw nut, a vertically arranged lifting guide rail is arranged on the chassis, the side surface of the lifting block is connected with the lifting guide rail, a limiting convex column is arranged at the top of the lifting block, a limiting groove is arranged at the bottom of the support block, and the positions of the limiting groove and the limiting convex column correspond to each other.

[0009] As the third preferred solution of the utility model, a translation vehicle is fixedly connected to the bottom of the support block, a driving motor is arranged on the side surface of the translation vehicle, and the output shaft of the driving motor is connected with the front wheel shaft of the translation vehicle.

[0010] The beneficial effects of the utility model are as follows:

[0011] The utility model opens a lower furnace opening at the bottom of the furnace body, installs a lower furnace door, fixes the heat preservation component on the inner side of the furnace body, arranges the mold and the mold support on the lower furnace door, arranges a lifting mechanism for driving the lower furnace door to lift between the chassis and the lower platform, and a translation vehicle is arranged at the bottom of the lower furnace door; when the mold and the mold support are driven by the lifting mechanism to fall and are separated from the heat preservation component, after the translation vehicle falls to the ground, the translation vehicle at the bottom of the lower furnace door starts and drives the lower furnace door to horizontally move out of the working area; the large-tonnage bottom-loading vacuum consumable skull melting furnace proposed by the utility model can directly transport the mold out from the lower furnace door, without the need to disassemble the heat preservation component, and there is no need for equipment such as forklifts to assist in transporting the mold out of the furnace body, which greatly saves manpower, improves work efficiency, and reduces the potential safety hazards of work. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the lower furnace door of the utility model in the closed state.

[0013] Figure 2 It is a schematic structural diagram of the lower furnace door of the utility model in the open state.

[0014] Figure 3 This is a schematic diagram of the horizontal movement state of the lower furnace door driven by the translation vehicle of the present utility model.

[0015] Figure 4 This is a schematic plan view of the specific structure below the lower furnace door of the present utility model.

[0016] Figure 5 This is a schematic three-dimensional structure diagram of the specific structure below the lower furnace door of the present utility model.

[0017] In the attached drawings, 1 is the furnace body, 2 is the lower furnace door, 3 is the locking ring, 4 is the mold support, 5 is the heat preservation component, 6 is the lower platform, 7 is the lifting mechanism, 71 is the bearing seat, 72 is the lead screw, 73 is the lifting block, 74 is the limit convex column, 75 is the limit groove, 76 is the lifting guide rail, 77 is the spacer sleeve, 78 is the disc spring, 79 is the lead screw nut, 710 is the lifting motor, 8 is the translation vehicle, 81 is the driving motor, 9 is the front furnace door, 10 is the mold, and 11 is the support block. Specific implementation manner

[0018] The present utility model adopts the following technical solutions. As Figure 1 shown, it includes a chassis. Above the chassis, there is a lower platform 6. On the lower platform 6, there is a furnace body 1. On the upper side of the furnace body 1, there is a front furnace opening. At the front furnace opening, there is a front furnace door 9. At the bottom of the furnace body 1, there is a lower furnace opening. At the lower furnace opening, there is a lower furnace door 2. On the side of the lower furnace door 2 facing the inside of the furnace body 1, there is a mold support 4. On the mold support 4, there is a mold 10. Inside the furnace body 1, there is a fixedly installed heat preservation component 5. The position of the heat preservation component 5 corresponds to the position of the mold 10. When the lower furnace door 2 is in the closed state, the heat preservation component 5 is sleeved outside the mold 10. The side of the lower furnace door 2 facing the outside of the furnace body 1 is fixedly connected with a support block 11. Between the chassis and the lower platform 6, there are several lifting mechanisms 7 for driving the support block 11 to move in the vertical direction. The lifting mechanism 7 drives the lower furnace door 2, the mold support 4, and the mold 10 to descend. Then the mold 10 disengages from the heat preservation component 5 and is finally driven by the lifting mechanism 7 to the chassis, as Figure 2 shown.

[0019] As a preferred solution of the present utility model, the lower furnace door 2 is locked at the lower furnace opening at the bottom of the furnace body 1 through a locking ring 3.

[0020] As another preferred solution of the present utility model, as Figure 4As shown in the figure, the lifting mechanism 7 includes a lifting motor 710 disposed on the chassis. The output shaft of the lifting motor 710 is connected to a lead screw 72 disposed in the vertical direction through a high-precision spiral bevel gear reducer, thereby changing the direction of transmission. One end of the lead screw 72 away from the lifting motor 71 is connected to a bearing block 71 disposed at the bottom of the lower platform 6. A lifting block 73 is disposed on the lead screw 72 through a lead screw nut 79. A disc spring 78 is sleeved on the lead screw 72 inside the lifting block 73. A spacer sleeve 77 is disposed between the disc spring 78 and the lead screw 72. A vertical lifting guide rail 76 is disposed on the chassis. The side surface of the lifting block 73 is connected to the lifting guide rail 76. A limit convex column 74 is disposed at the top of the lifting block 73. A limit groove 75 is disposed at the bottom of the support block 11. The positions of the limit groove 75 and the limit convex column 74 correspond to each other.

[0021] As the third preferred embodiment of the present invention, as Figure 3 shown in the figure, a translation vehicle 8 is fixedly connected to the bottom of the support block 11. A drive motor 81 is disposed on the side surface of the translation vehicle 8. The output shaft of the drive motor 81 is connected to the front wheel shaft of the translation vehicle 8.

[0022] Through the cooperation of the limit groove 75 and the limit convex column 74, the lifting block 73 drives the support block 11 to move up and down. When the translation vehicle 8 at the bottom of the lifting block 73 touches the ground during the descent, and the lifting block 73 continues to descend, the limit groove 75 and the limit convex column 74 are separated, and the translation vehicle 8 can drive components such as the lower furnace door 2 above to horizontally move out of the chassis area.

[0023] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirements are met, they are all within the protection scope of the present invention.

Claims

1. A large-tonnage bottom-loading vacuum consumable shell furnace, characterized in that: The invention comprises a base frame, a lower platform (6) is arranged above the base frame, a furnace body (1) is arranged on the lower platform (6), a front furnace opening is arranged on the upper side of the furnace body (1), a front furnace door (9) is arranged at the front furnace opening, a lower furnace opening is arranged at the bottom of the furnace body (1), a lower furnace door (2) is arranged at the lower furnace opening, a mold support (4) is arranged on the side of the lower furnace door (2) facing the inside of the furnace body (1), a mold (10) is arranged on the mold support (4), a heat preservation component (5) is fixedly installed inside the furnace body (1), and the position of the heat preservation component (5) corresponds to the position of the mold (10); a support block (11) is fixedly connected to the side of the lower furnace door (2) facing the outside of the furnace body (1), and a plurality of lifting mechanisms (7) for driving the support block (11) to move in the vertical direction are arranged between the base frame and the lower platform (6).

2. A large-tonnage bottom-loading vacuum consumable shell furnace as claimed in claim 1, characterized in that: The lower furnace door (2) is locked to the lower furnace opening at the bottom of the furnace body (1) by means of a locking ring (3).

3. A large-tonnage bottom-loading vacuum consumable shell furnace as claimed in claim 1, characterized in that: The lifting mechanism (7) comprises a lifting motor (710) arranged on a base frame, the output shaft of the lifting motor (710) is connected to a vertically arranged lead screw (72), one end of the lead screw (72) away from the lifting motor (710) is connected to a bearing seat (71) arranged at the bottom of the lower platform (6), a lifting block (73) is arranged on the lead screw (72) via a lead screw nut (79), a vertical lifting guide rail (76) is arranged on the base frame, a side surface of the lifting block (73) is connected to the lifting guide rail (76), a limiting convex column (74) is arranged on the top of the lifting block (73), and a limiting groove (75) is arranged at the bottom of the support block (11), and the limiting groove (75) and the limiting convex column (74) are located in corresponding positions.

4. A large-tonnage bottom-loading vacuum consumable shell furnace as claimed in claim 3, characterized in that: The bottom of the support block (11) is fixedly connected to a translation vehicle (8), a driving motor (81) is arranged on the side of the translation vehicle (8), and an output shaft of the driving motor (81) is connected to a front wheel axle of the translation vehicle (8).

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