Vacuum induction melting furnace for nickel alloy production

Abstract

The utility model discloses a vacuum induction melting furnace for nickel alloy production. The vacuum induction melting furnace comprises an induction furnace body and an air exhaust mechanism, a crucible is arranged in the induction furnace body, and a furnace cover is arranged at the upper end of the induction furnace body; the air exhaust mechanism comprises a sliding disc, a first corrugated pipe, a sealing ring and a second corrugated pipe, the sealing ring is arranged on the inner arc face of the furnace cover, the lower surface of the sealing ring is attached to the upper surface of the crucible, the second corrugated pipe is arranged between the lower surface of the sealing ring and the upper surface of the sliding disc, and the sliding disc is connected into the crucible in a sliding mode; and a corrugated pipe I is arranged between the opening in the upper surface of the sliding disc and the air hole in the top wall of the furnace cover. According to the vacuum induction melting furnace for nickel alloy production, firm sealing is guaranteed, meanwhile, the size of a melting space can be reduced, the time needed for vacuumizing is shortened, and energy consumption is reduced according to the melting degree of nickel alloy raw materials; and the working efficiency of the vacuum induction melting furnace is improved.

Description

Technical Field

[0001] This utility model relates to the field of nickel alloy production technology, specifically to a vacuum induction melting furnace for nickel alloy production. Background Technology

[0002] Nickel alloys are alloys composed of nickel as the base material and other elements added. They possess excellent mechanical, physical, and chemical properties. By adding suitable elements, their oxidation resistance, corrosion resistance, high-temperature strength, and certain physical properties can be improved. Nickel alloys have a wide range of applications, including electronics, chemicals, machinery, medical, energy development, and marine, aviation, and aerospace fields. In the production of nickel alloys, to improve quality, vacuum induction melting furnaces are often used to melt the metal raw materials. Melting under vacuum conditions can effectively remove impurities such as nitrogen, hydrogen, oxygen, and carbon, improving the purity of the alloy. This method is suitable for melting alloys requiring precise composition control, high purity, and few inclusions. Among existing technologies, the authorized publication CN216815010... U proposes a vacuum melting furnace for copper alloy wire production, including a base and a furnace body, as well as a controller, a crucible, a tilting mechanism, and a vacuuming mechanism. The tilting mechanism includes a heating tank, a rotating shaft, and a drive assembly. The vacuuming mechanism includes a vacuum sensor and an extraction assembly, with the extraction assembly located on top of the base. The vacuum sensor, drive assembly, and extraction assembly are all electrically connected to the controller. Although vacuum melting can be achieved, during the vacuuming process, when the metal raw material is not yet melted, it is blocked by the metal raw material, resulting in a large melting space volume and a long vacuuming time, which affects the melting efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a vacuum induction melting furnace for nickel alloy production. While ensuring a firm seal, it can reduce the volume of the melting space according to the melting degree of the nickel alloy raw materials, reduce the time required for vacuuming, reduce energy consumption, and improve the working efficiency of the vacuum induction melting furnace, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a vacuum induction melting furnace for nickel alloy production, comprising an induction furnace body and a gas extraction mechanism;

[0005] Induction furnace body: It contains a crucible, and the upper end of the induction furnace body is equipped with a furnace cover;

[0006] The vacuuming mechanism includes a sliding plate, a first bellows, a sealing ring, and a second bellows. The sealing ring is located on the inner arc surface of the furnace cover, and its lower surface is in contact with the upper surface of the crucible. The second bellows is located between the lower surface of the sealing ring and the upper surface of the sliding plate. The sliding plate is slidably connected to the inside of the crucible. The first bellows is located between the opening on the upper surface of the sliding plate and the air hole on the top wall of the furnace cover. While ensuring a firm seal, the volume of the melting space can be reduced according to the melting degree of the nickel alloy raw material, thus reducing the time required for vacuuming, reducing energy consumption, and improving the working efficiency of the vacuum induction melting furnace.

[0007] Furthermore, the interior of the induction furnace is equipped with a high-frequency current generator, an induction coil, and a microcontroller. The induction coil is movably sleeved on the outer arc surface of the crucible. The input end of the induction coil is electrically connected to the output end of the high-frequency current generator, the input end of the high-frequency current generator is electrically connected to the output end of the microcontroller, and the input end of the microcontroller is electrically connected to an external power supply to control the start and stop of the entire device.

[0008] Furthermore, the exhaust mechanism also includes electric push rods, which are respectively installed in the mounting holes on the surface of the furnace cover. The telescopic ends of the electric push rods are fixedly connected to the slide plate, and the input ends of the electric push rods are electrically connected to the output end of the microcontroller to provide power for the movement of the slide plate.

[0009] Furthermore, the air extraction mechanism also includes a slip ring and a pressure sensor. The upper surface of the slip ring is provided with a sliding column, which is vertically slidably connected to the sliding groove on the lower surface of the sliding plate. The pressure sensor is respectively set inside the sliding groove on the lower surface of the sliding plate. The output end of the pressure sensor is electrically connected to the input end of the microcontroller to detect whether the sliding plate moves downward.

[0010] Furthermore, it also includes a vacuum pump, which is located on the left side of the induction furnace body. An air pipe is provided between the vacuum pump and the air hole on the upper surface of the furnace cover. The input end of the vacuum pump is electrically connected to the output end of the microcontroller to provide power for vacuuming.

[0011] Furthermore, a sealing gasket is provided on the lower surface of the sealing ring to make the contact between the sealing ring and the crucible tighter.

[0012] Furthermore, the slip ring is a ceramic heat-insulating ring, which blocks the transfer of heat.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This vacuum induction melting furnace for nickel alloy production has the following advantages:

[0014] While ensuring a secure seal, the volume of the melting space can be reduced according to the melting degree of the nickel alloy raw materials, thereby reducing the time required for vacuuming, reducing energy consumption, and improving the working efficiency of the vacuum induction melting furnace. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the side cross-section of the induction furnace body of this utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model.

[0018] In the diagram: 1. Induction furnace body, 2. Crucible, 3. Furnace cover, 4. Evacuation mechanism, 41. Sliding plate, 42. Bellows I, 43. Sealing ring, 44. Bellows II, 45. Electric push rod, 46. Slip ring, 47. Pressure sensor, 5. High-frequency current generator, 6. Induction coil, 7. Microcontroller, 8. Vacuum pump, 9. Gas pipe, 10. Sealing gasket. Detailed Implementation

[0019] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This embodiment provides a technical solution: a vacuum induction melting furnace for nickel alloy production, including an induction furnace body 1 and a gas extraction mechanism 4;

[0021] Induction furnace body 1: It has a crucible 2 inside, which provides space for melting nickel alloy raw materials. The upper end of the induction furnace body 1 is provided with a furnace cover 3, which is threadedly connected to the induction furnace body 1 to close the opening at the upper end of the induction furnace body 1. The induction furnace body 1 is provided with a high frequency current generator 5, an induction coil 6 and a microcontroller 7. The induction coil 6 is movably sleeved on the outer arc surface of the crucible 2. The input end of the induction coil 6 is electrically connected to the output end of the high frequency current generator 5. The high frequency current generated by the high frequency current generator 5 is transmitted to the induction coil 6. Through the principle of electromagnetic induction, the metal raw materials are heated to the melting temperature. The input end of the high frequency current generator 5 is electrically connected to the output end of the microcontroller 7. The input end of the microcontroller 7 is electrically connected to an external power supply to control the start and stop of the whole device. It also includes a vacuum pump 8, which is located on the left side of the induction furnace body 1. A gas pipe 9 is provided between the vacuum pump 8 and the air hole on the upper surface of the furnace cover 3. The input end of the vacuum pump 8 is electrically connected to the output end of the microcontroller 7 to extract the air in the melting space.

[0022] The extraction mechanism 4 includes a sliding plate 41, a first bellows 42, a sealing ring 43, and a second bellows 44. The sealing ring 43 is located on the inner arc surface of the furnace cover 3, and its lower surface is in contact with the upper surface of the crucible 2. The second bellows 44 is located between the lower surface of the sealing ring 43 and the upper surface of the sliding plate 41. The sliding plate 41 is slidably connected to the inside of the crucible 2. The first bellows 42 is located between the opening on the upper surface of the sliding plate 41 and the vent hole on the top wall of the furnace cover 3. When the sliding plate 41 moves downward, the first bellows 42 and the second bellows 44... The second bellows 44 deforms, and through the cooperation of the sealing ring 43, the sliding plate 41, and the second bellows 44, the sealing effect of the upper end of the crucible 2 is ensured while reducing the volume of the melting space, speeding up the vacuuming time, and reducing energy consumption. The vacuuming mechanism 4 also includes electric push rods 45, which are respectively set in the mounting holes on the surface of the furnace cover 3. The extension and retraction ends of the electric push rods 45 are fixedly connected to the sliding plate 41, and the input end of the electric push rod 45 is electrically connected to the output end of the microcontroller 7. The up-and-down movement of the disc 41 provides airflow. The suction mechanism 4 also includes a slip ring 46 and a pressure sensor 47. The upper surface of the slip ring 46 is provided with sliding columns, which are vertically slidably connected to the grooves on the lower surface of the disc 41. The pressure sensor 47 is respectively set inside the grooves on the lower surface of the disc 41. The output end of the pressure sensor 47 is electrically connected to the input end of the microcontroller 7. When the metal material is not being melted, the metal material blocks the downward movement of the slip ring 46, and applies a force to the detection end of the pressure sensor 47 through the slip ring 46. When the metal material is gradually melted to a liquid state, the metal material no longer blocks the downward movement of the slip ring 46. At this time, the detection end of the pressure sensor 47 does not detect pressure, and the pressure sensor 47 sends a signal to the microcontroller 7. The microcontroller 7 controls the extension end of the electric push rod 45 to extend. The lower surface of the sealing ring 43 is provided with a sealing gasket 10, which makes the contact between the sealing ring 43 and the crucible 2 tighter and improves the sealing effect. The slip ring 46 is a ceramic heat insulation ring to reduce the transfer of heat upward.

[0023] The working principle of the vacuum induction melting furnace for nickel alloy production provided by this utility model is as follows: During the nickel alloy production process, the metal raw material is poured into the crucible 2. The high-frequency current generator 5 is activated by the microcontroller 7. The high-frequency current generated by the high-frequency current generator 5 is transmitted to the induction coil 6. Through the principle of electromagnetic induction, the metal raw material is heated to the melting temperature. Then, the vacuum pump 8 is activated. Through the connection between the air pipe 9 and the bellows 42, the air inside the crucible 2 is extracted. During the vacuuming process, when the metal material is not being melted, the metal material blocks the downward movement of the slip ring 46. The slip ring 46 exerts pressure on the metal material. When the force sensor 47 applies a force to its detection end, as the metal material gradually melts into a liquid state, the metal material no longer obstructs the downward movement of the slip ring 46. At this time, the pressure sensor 47 does not detect any pressure, and the pressure sensor 47 sends a signal to the microcontroller 7. The microcontroller 7 controls the extension end of the electric push rod 45 to extend, causing the slide plate 41 to move downward. The bellows 1 42 and the bellows 2 44 deform. Through the cooperation of the sealing ring 43, the slide plate 41 and the bellows 2 44, the sealing effect of the upper end of the crucible 2 is ensured while reducing the volume of the melting space, speeding up the time required for vacuuming, and reducing energy consumption.

[0024] It is worth noting that the microcontroller 7 disclosed in the above embodiments can be a PIC16F1823-I / P model microcontroller. The high-frequency current generator 5, electric actuator 45, pressure sensor 47 and vacuum pump 8 can be freely configured according to the actual application scenario. The high-frequency current generator 5 can be an ANB11-2KVA model high-frequency current generator, the electric actuator 45 can be an ANT-52 model electric actuator, the pressure sensor 47 can be a DJYL-SX model pressure transmitter, and the vacuum pump 8 can be a PM24407-86 model vacuum pump. The microcontroller 7 controls the operation of the high-frequency current generator 5, electric actuator 45, pressure sensor 47 and vacuum pump 8 using methods commonly used in the prior art.

[0025] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A vacuum induction melting furnace for nickel alloy production, characterized in that: It includes an induction furnace body (1) and an air extraction mechanism (4); Induction furnace body (1): It is equipped with a crucible (2) inside and a furnace cover (3) is provided at the top of the induction furnace body (1); The exhaust mechanism (4) includes a sliding plate (41), a first bellows (42), a sealing ring (43), and a second bellows (44). The sealing ring (43) is located on the inner arc surface of the furnace cover (3). The lower surface of the sealing ring (43) is in contact with the upper surface of the crucible (2). The second bellows (44) is provided between the lower surface of the sealing ring (43) and the upper surface of the sliding plate (41). The sliding plate (41) is slidably connected to the inside of the crucible (2). The first bellows (42) is provided between the opening on the upper surface of the sliding plate (41) and the air hole on the top wall of the furnace cover (3).

2. The vacuum induction melting furnace for nickel alloy production according to claim 1, characterized in that: The induction furnace body (1) is equipped with a high-frequency current generator (5), an induction coil (6) and a microcontroller (7). The induction coil (6) is movably sleeved on the outer arc surface of the crucible (2). The input end of the induction coil (6) is electrically connected to the output end of the high-frequency current generator (5). The input end of the high-frequency current generator (5) is electrically connected to the output end of the microcontroller (7). The input end of the microcontroller (7) is electrically connected to an external power supply.

3. The vacuum induction melting furnace for nickel alloy production according to claim 2, characterized in that: The exhaust mechanism (4) also includes an electric push rod (45), which is respectively set in the mounting holes on the surface of the furnace cover (3). The telescopic ends of the electric push rod (45) are fixedly connected to the slide plate (41), and the input end of the electric push rod (45) is electrically connected to the output end of the microcontroller (7).

4. The vacuum induction melting furnace for nickel alloy production according to claim 2, characterized in that: The air extraction mechanism (4) also includes a slip ring (46) and a pressure sensor (47). The upper surface of the slip ring (46) is provided with a sliding column, which is vertically slidably connected to the groove on the lower surface of the slide plate (41). The pressure sensor (47) is respectively set inside the groove on the lower surface of the slide plate (41), and the output end of the pressure sensor (47) is electrically connected to the input end of the microcontroller (7).

5. A vacuum induction melting furnace for nickel alloy production according to claim 2, characterized in that: It also includes a vacuum pump (8), which is located on the left side of the induction furnace body (1). A gas pipe (9) is provided between the vacuum pump (8) and the air hole on the upper surface of the furnace cover (3). The input end of the vacuum pump (8) is electrically connected to the output end of the microcontroller (7).

6. The vacuum induction melting furnace for nickel alloy production according to claim 1, characterized in that: The lower surface of the sealing ring (43) is provided with a sealing gasket (10).

7. The vacuum induction melting furnace for nickel alloy production according to claim 4, characterized in that: The slip ring (46) is a ceramic heat insulation ring.

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