Induction heating type crucible holder for a sample melting machine

Abstract

The utility model belongs to the technical field of sample melting machine, disclose a kind of induction heating formula crucible bracket for sample melting machine, it is arranged in the inside of rack, and the center of inner layer board in rack is equipped with round hole, and rotary insulating plate is connected in round hole, and the upper bracket mechanism is arranged on rotary insulating plate, and the lower bracket mechanism is arranged below upper bracket mechanism and is fixed on the inner layer board of rack, and melt crucible is arranged in upper bracket mechanism, and the lower melt crucible is correspondingly set on the lower bracket mechanism and is shaped crucible, melt crucible and shaped crucible are used in pairs, motor rotates swing shaft by bevel gear rotating table to rotate and thereby drive upper bracket mechanism to rotate, melt in melt crucible is poured into shaped crucible and is shaped, the utility model is highly integrated, and heating is efficient and uniform, and it is accurate and reliable to prevent rotation positioning, pour sample accurately, water and electricity integrated supply, the design of the suspension of melt coil, and heat dissipation and cooling efficiency are high.

Description

Technical Field

[0001] This utility model belongs to the field of melting machine technology, specifically relating to an induction heating crucible holder for a melting machine. Background Technology

[0002] A melting machine is a device used to melt materials such as minerals and glass at high temperatures and prepare uniform sample pieces. One of its core components is the support frame used to support and fix the melting crucible and the forming crucible. Existing support frames mostly focus on simple mechanical fixation and anti-tipping functions, which have problems such as single function, low thermal efficiency and poor positioning accuracy.

[0003] For example, Chinese utility model patent CN218349948U discloses a simple support for a melting machine. This support restricts the crucible's left and right movement through slots on the separator bars and uses triangularly arranged crossbars for protection and positioning. While this support simplifies the structure, its function is limited to mechanical support and positioning. Heating the crucible relies on an external main heating source for the melting machine, resulting in low thermal efficiency, and it does not address the precise positioning issues related to pouring and melting.

[0004] For example, Chinese invention patent CN108801758B discloses an integrated bracket and sample carrying mechanism. It employs a one-piece molded structure to improve overall rigidity and high-temperature stability, and uses a special sample placement hole and front and rear baffle design to set and limit the crucible. However, this bracket is also merely a passive carrying mechanism, lacking active heating functionality; the heating and cooling of the crucible are completely separated from the bracket.

[0005] In addition, existing induction heating melting machines typically have their heating coils fixed inside the furnace chamber, separate from the support frame. This design means that when the support frame swings, the crucible needs to be moved out of the heating zone and through a complex network of pipes, resulting in a complex structure, low reliability, and low integration between the cooling system and the heating coil.

[0006] In summary, the existing brackets have the following common defects:

[0007] 1. It has a single function, serving only as a mechanical support component and cannot participate in the active heating process, resulting in low energy utilization.

[0008] 2. The problem of precise guidance and positioning of the molten liquid during pouring has not been solved, relying on the operator's experience and resulting in poor repeatability;

[0009] 3. The structure does not consider integration with the high-frequency power supply and cooling system, and the external pipeline layout is complicated, which affects the movement of the swing mechanism.

[0010] Therefore, there is an urgent need for a new type of support that inherits the characteristics of induction heating and efficient cooling, and can achieve precise tilting of molten crucibles. Utility Model Content

[0011] To solve the above-mentioned technical problems, this utility model provides an induction heating crucible holder for a melting machine. It features highly integrated functions, efficient and uniform heating, precise anti-rotation positioning, accurate and reliable sample tilting, integrated water and electricity supply, and a suspended design for the melting coil, resulting in high heat dissipation and cooling efficiency.

[0012] To achieve the above objectives, the present invention adopts the following technical solution: an induction heating crucible holder for a melting sample machine is installed inside the machine frame. The inner layer plate 1 of the machine frame has a circular hole at its center. A rotating insulating plate 101 is connected to the circular hole. An upper support mechanism 2 is installed on the rotating insulating plate 101. A lower support mechanism 3 is installed below the upper support mechanism 2 and fixed on the inner layer plate 1 of the machine frame. A melting crucible is installed inside the upper support mechanism. A forming crucible is installed below the melting crucible and on the lower support mechanism. The melting crucible and the forming crucible are used in combination. A motor drives the swing shaft to rotate through a bevel gear rotary table, thereby driving the upper support mechanism to rotate and pouring the molten sample in the melting crucible into the forming crucible for shaping.

[0013] Specifically, the lower support mechanism includes a forming coil fixed to the inner layer plate of the frame via a transverse oblong hole on a rectangular fixing plate, and a forming coil passing through the rectangular fixing plate, and a support base surrounding the forming coil. The forming coil is made of a continuous high-conductivity metal tube, and its main body is a planar spiral elastic coil used to support the forming crucible. The forming coil also includes a pair of symmetrically arranged connecting legs, which extend outward from both ends of the elastic coil. The fixing plate has a pair of mounting holes, and the pair of connecting legs are inserted into the mounting holes through connecting connectors, so that the forming coil is suspended in front of the fixing plate. The connecting legs extend backward to connect to an external high-frequency power supply and cooling water source. This allows the cooling water to flow inside the metal tube, while the current generates an alternating magnetic field through the coil.

[0014] Specifically, the upper support mechanism includes a molten coil, which has the same structure as the forming coil. Its connecting legs are installed through the circular holes of the rotating insulating plate via connecting joints. The rotating insulating plate is fixedly connected to the swing shaft and rotates with it. The connecting legs extend backward and are fixed on the water cable fixing seat, and are connected to an external high-frequency power supply and cooling water source through a rotating joint.

[0015] Specifically, the outer diameter of the elastic coil is smaller than the bottom outer diameter of the support base, so that when the support base is sleeved on the outside of the elastic coil, the inner side wall of the bottom of the support base forms an interference fit with the outer periphery of the elastic coil, and the support base is fastened by the radial elastic force of the elastic coil.

[0016] Specifically, the forming crucible is a disc-shaped container with an open top and a downward-bent flange. A handle is provided on the flange, and an opening is provided on the flange to accommodate the forming crucible and its handle.

[0017] Specifically, the melting crucible is a cylindrical structure with an open top, and has two layers of flanges on the top, including an upper flange and a lower flange below it. There is a height difference between the two flanges, and two transverse protrusions are symmetrically arranged on the left and right sides of the outer wall of the cylindrical structure below the lower flange.

[0018] Specifically, the melting crucible is placed inside the melting coil via a crucible holder. The crucible holder is an integrally formed cylindrical structure with openings at the top and bottom, including a cylinder and an edge formed by bending the top outwards. The edge has symmetrically recessed cuts on the left and right sides, making the upper surface an elliptical shape with a non-complete arc. The left and right edges and the inner side of the cylinder wall are cut together to form two symmetrical grooves.

[0019] Specifically, the lateral protrusion cooperates with the two grooves of the crucible holder to restrict the circumferential rotation of the molten crucible within the crucible holder.

[0020] Specifically, both the melting crucible and the forming crucible are made of ceramic.

[0021] Specifically, the elastic coil is covered with a high-temperature resistant insulating sleeve.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. Highly integrated functions, efficient and uniform heating: This invention creatively uses an elastic coil as the core component of the support. The elastic coil itself is both a support and a heater, enabling direct and efficient induction heating of the crucible, significantly reducing heat transfer loss, improving energy utilization and heating speed, and making the sample heated more uniformly;

[0024] 2. Precision anti-rotation positioning ensures accurate and reliable sample pouring: The ingenious combination of the transverse protrusion on the molten crucible and the groove on the crucible support effectively restricts the circumferential rotation of the crucible during swinging and tilting. This design ensures that no matter how the support rotates, the outlet of the molten liquid can always be precisely guided to the forming crucible below, greatly improving the success rate of sample pouring and the repeatability of experiments, overcoming the drawbacks of existing technologies that rely on manual experience for positioning;

[0025] 3. Integrated water and electricity supply, simple and reliable structure: The flexible coil has multiple functions, mechanical support, energized electrodes, and cooling water channels. The external high-frequency power supply and cooling water source are directly introduced into the flexible coil that rotates with the swing shaft through a rotary joint. This integrated "water and cable" design greatly simplifies the layout of external pipelines and avoids the entanglement, wear, or interference of complex hoses and cables during the swing process, thereby improving the system's operational reliability and service life.

[0026] 4. Suspended cooling design for excellent heat dissipation and long lifespan: The coil is suspended in front of the mounting plate via connecting feet, creating an excellent heat dissipation environment. Simultaneously, cooling water flows through the metal tubes inside the coil, directly and efficiently carrying away the large amount of heat generated by induction heating. This effectively prevents the coil itself from burning out or experiencing performance degradation due to overheating, protects the surrounding support structure, and significantly extends the service life of the entire device.

[0027] 5. Modular and standardized design for easy maintenance: The elastic coils of the upper and lower bracket mechanisms use the same structure, reducing the variety of parts and manufacturing costs. The support base and the elastic coil adopt an interference fit, utilizing the coil's own elasticity for clamping, making assembly and disassembly very simple and facilitating later maintenance or replacement. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0029] Figure 2 This is the front view of the present invention;

[0030] Figure 3 This is a schematic diagram of the lower support mechanism of this utility model;

[0031] Figure 4 This is a three-dimensional schematic diagram of the crucible holder of this utility model;

[0032] Figure 5 A three-dimensional schematic diagram of the melting crucible of this utility model;

[0033] The markings in the diagram are: 1. Inner frame plate; 101. Rotating insulating plate; 102. Longitudinal oblong hole; 2. Upper bracket mechanism; 21. Melting coil; 3. Lower bracket mechanism; 31. Fixing plate; 32. Forming coil; 33. Support base; 34. Elastic coil; 35. Connecting foot; 301. Transverse oblong hole; 302. Mounting hole; 4. Melting crucible; 41. Upper flange; 42. Lower flange; 43. Transverse protrusion; 44. Crucible support; 45. Cylinder; 46. Edge; 47. Groove; 5. Forming crucible; 6. Swing shaft; 7. Connecting joint. Detailed Implementation

[0034] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0035] like Figure 1-2 As shown, an induction heating crucible holder for a melting sample machine is installed inside the frame. The inner layer plate 1 of the frame has a circular hole in the center, and a rotating insulating plate 101 is connected to the circular hole. An upper support mechanism 2 is installed on the rotating insulating plate 101, and a lower support mechanism 3 is installed below the upper support mechanism 2 and fixed on the inner layer plate 1 of the frame. A melting crucible 4 is installed in the upper support mechanism, and a forming crucible 5 is installed below the melting crucible 4 and on the lower support mechanism 3. The melting crucible 4 and the forming crucible 5 are used together. The motor drives the swing shaft 6 to rotate through the bevel gear rotary table, thereby driving the upper support mechanism 2 to rotate, and pouring the molten sample in the melting crucible 4 into the forming crucible 5 to form the sample.

[0036] like Figure 3 As shown, the lower support mechanism 3 includes a longitudinally shaped hole 102 fixed to the inner layer plate 1 of the frame through a transverse oblong hole 301 on a rectangular fixing plate 31. It also includes a forming coil 32 passing through the rectangular fixing plate 31 and a support base 33 surrounding the forming coil 32. The forming coil 32 is made of a continuous high-conductivity metal tube, and its main body is a planar spiral elastic coil 34 used to support the forming crucible 5. The forming coil 32 also includes a pair of symmetrically arranged connecting legs 35, which are formed by the elastic coil... The two ends of coil 34 extend outwards to form a shape. A pair of mounting holes 302 are provided on the fixing plate 31. A pair of connecting legs 35 are respectively inserted into and fixed within the mounting holes 302, allowing the formed coil 32 to be suspended in front of the fixing plate 31. The pair of connecting legs are inserted into the mounting holes via connecting connectors, allowing the formed coil to be suspended in front of the fixing plate. The connecting legs extend backwards to connect to an external high-frequency power supply and cooling water source, allowing cooling water to flow inside the metal pipe. Simultaneously, current can generate an alternating magnetic field through the coil.

[0037] Preferably, the upper support mechanism 2 includes a molten coil 21, which has the same structure as the forming coil 32. Its connecting leg 35 is installed through the circular hole of the rotating insulating plate 101 via the connecting joint 7. The rotating insulating plate 101 is fixedly connected to the swing shaft 6 and rotates with it. The connecting leg 35 extends backward and is fixed on the water cable fixing seat, and is connected to the external high-frequency power supply and cooling water source through the rotating joint.

[0038] Preferably, the outer diameter of the elastic coil 34 is smaller than the bottom outer diameter of the support 33, so that when the support 33 is sleeved on the outside of the elastic coil 34, the inner sidewall of the bottom of the support 33 forms an interference fit with the outer periphery of the elastic coil 34, and the support 33 is fastened by the radial elastic force of the elastic coil 34.

[0039] Preferably, the forming crucible 5 is a disc-shaped container with an open top and a downward-bent flange. The flange has a handle, and the flange has an opening for accommodating the forming crucible 5 and its handle.

[0040] like Figure 5 As shown, the melting crucible 4 is a cylindrical structure with an open top. It has two layers of flanges on the top, including an upper flange 41 and a lower flange 42 below it. There is a height difference between the two flanges. On the outer wall of the cylindrical structure, there are two transverse protrusions 43 symmetrically arranged on the left and right sides below the lower flange 42.

[0041] like Figure 4 As shown, the melting crucible 4 is placed inside the melting coil 21 through the crucible holder 44. The crucible holder 44 is an integrally formed cylindrical structure with openings at the top and bottom, including a cylinder 45 and an edge 46 formed by bending the top outward. The edge 46 has symmetrically recessed cutting parts on the left and right sides, so that the upper surface is an elliptical shape with a non-complete arc. The left and right edges 46 and the inner side of the cylinder wall of the cylinder 45 are cut together to form two symmetrical grooves 47.

[0042] Preferably, the lateral protrusion 43 cooperates with the two grooves 47 of the crucible holder 44 to restrict the circumferential rotation of the molten crucible 4 within the crucible holder 44.

[0043] Preferably, both the melting crucible 4 and the forming crucible 5 are made of ceramic.

[0044] Preferably, the elastic coil 34 is covered with a high-temperature resistant insulating sleeve.

[0045] The working process of this utility model:

[0046] 1. Place the crucible:

[0047] Place the forming crucible 5 at the spiral center of the forming coil 32 of the lower support mechanism 3. Place the molten crucible 4 into the crucible holder 44, ensuring that the transverse protrusions 43 on both sides of the molten crucible 4 accurately fall into the grooves 47 of the crucible holder 44 to achieve axial positioning. Then, place the assembled molten crucible 4 and crucible holder 44 together at the spiral center of the molten coil 21 of the upper support mechanism 2.

[0048] 2. Heating and melting the sample:

[0049] The melting coil 21 is connected to an external high-frequency power supply and cooling water source via connector 7. The high-frequency current flowing through the melting coil 21 generates an alternating magnetic field, which causes eddy currents to be generated in the internal melting crucible 4, thus heating the sample inside to a molten state.

[0050] As needed, the forming coil 32 of the lower support mechanism 3 can be energized simultaneously or separately to preheat or keep the forming crucible 5 warm.

[0051] 3. Swinging and inverting:

[0052] After the sample is melted, the motor drives the swing shaft 6 to rotate via the bevel gear rotary table, which in turn drives the upper support mechanism 2 to rotate and tilt, allowing the molten sample in the molten crucible 4 to be poured into the forming crucible 5 for shaping. Since the molten crucible 4 is fixed in the crucible support 44 by the cooperation of the transverse protrusion 43 and the groove 47, and the two do not rotate relative to each other, the pouring position of the molten crucible 4 remains unchanged.

[0053] The molten liquid is precisely poured from the molten crucible 4 into the fixed molding crucible 5 below under the action of gravity.

[0054] 4. Reset to standby:

[0055] After the sample pouring is complete, the drive motor rotates in the opposite direction, and the bevel gear rotary table drives the upper support mechanism 2 to rotate to a horizontal position via the swing shaft 6. The high-frequency power supply is cut off, and the cooling water continues to run for a period of time before stopping. The forming crucible 5 is removed for cooling, and the molten crucible 4 is removed for cleaning, in preparation for the next experiment.

[0056] Throughout the process, the heating and cooling of the coil and the swinging function of the bracket work closely together, and through a highly integrated structural design, efficient, precise and automated sample preparation is achieved.

Claims

1. An induction heating crucible holder for a melting machine, disposed inside the machine frame, characterized in that: The inner layer plate (1) of the frame has a circular hole in the center. A rotating insulating plate (101) is connected in the circular hole. An upper bracket mechanism (2) is provided on the rotating insulating plate (101). A lower bracket mechanism (3) is provided below the upper bracket mechanism (2) and fixed on the inner layer plate (1) of the frame. A melting crucible (4) is provided in the upper bracket mechanism. A forming crucible (5) is provided below the melting crucible (4) and on the lower bracket mechanism (3). The melting crucible (4) and the forming crucible (5) are used together. The motor drives the swing shaft (6) to rotate through the bevel gear rotary table, thereby driving the upper bracket mechanism (2) to rotate and pouring the melt sample in the melting crucible (4) into the forming crucible (5) to form.

2. The induction heating crucible holder for a melting machine according to claim 1, characterized in that: The lower support mechanism (3) includes a longitudinally shaped hole (102) fixed to the inner plate (1) of the frame through a transverse oblong hole (301) on a rectangular fixing plate (31), and a forming coil (32) passing through the rectangular fixing plate (31) and a support base (33) surrounding the forming coil (32). The forming coil (32) is made of a continuous high conductivity metal tube, and its main body is a planar spiral elastic coil (34) used to support the forming crucible (5). The forming coil (32) also includes a pair of symmetrically arranged connecting legs (35). The connecting legs (35) are formed by extending outward from both ends of the elastic coil (34). The fixing plate (31) is provided with a pair of mounting holes (302). The pair of connecting legs (35) are inserted into the mounting holes (302) through the connecting connector (7), so that the forming coil (32) is suspended in front of the fixing plate (31). The connecting legs (35) extend backward and are connected to an external high-frequency power supply and cooling water source.

3. The induction heating crucible holder for a melting machine according to claim 2, characterized in that: The upper support mechanism (2) includes a molten coil (21), which has the same structure as the forming coil (32). Its connecting leg (35) is installed through the connecting joint (7) in the round hole of the rotating insulating plate (101). The rotating insulating plate (101) is fixedly connected to the swing shaft (6) and rotates with it. The connecting leg (35) extends backward and is fixed on the water cable fixing seat, and is connected to the external high-frequency power supply and cooling water source through the rotating joint.

4. The induction heating crucible holder for a melting machine according to claim 2, characterized in that: The outer diameter of the elastic coil (34) is smaller than the bottom outer diameter of the support (33), so that when the support (33) is sleeved on the outside of the elastic coil (34), the inner side wall of the bottom of the support (33) forms an interference fit with the outer periphery of the elastic coil (34), and the support (33) is fastened by the radial elastic force of the elastic coil (34).

5. The induction heating crucible holder for a melting machine according to claim 1, characterized in that: The molding crucible (5) is a disc-shaped container with an open top and a downward-bent flange. A handle is provided on the flange. The molding crucible (5) has an opening on the flange for accommodating the molding crucible (5) and its handle.

6. The induction heating crucible holder for a melting machine according to claim 1, characterized in that: The melting crucible (4) is a cylindrical structure with an open top. It has two flanges on the top, including an upper flange (41) and a lower flange (42) below it. There is a height difference between the two flanges. On the outer wall of the cylindrical structure, there are two transverse protrusions (43) symmetrically arranged on the left and right sides below the lower flange (42).

7. The induction heating crucible holder for a melting machine according to claim 6, characterized in that: The melting crucible (4) is placed inside the melting coil (21) via a crucible holder (44). The crucible holder (44) is an integrally formed cylindrical structure with openings at the top and bottom, including a cylinder (45) and an edge (46) formed by bending the top outward. The edge (46) has symmetrically recessed cutting portions on the left and right sides, making the upper surface an elliptical shape with a non-complete arc. The left and right edges (46) and the inner side of the cylinder wall (45) are cut together to form two symmetrical grooves (47).

8. The induction heating crucible holder for a melting machine according to claim 7, characterized in that: The lateral protrusion (43) cooperates with the two grooves (47) of the crucible holder (44) to restrict the circumferential rotation of the molten crucible (4) within the crucible holder (44).

9. The induction heating crucible holder for a melting machine according to claim 1, characterized in that: Both the melting crucible (4) and the forming crucible (5) are made of ceramic.

10. The induction heating crucible holder for a melting machine according to claim 2, characterized in that: The elastic coil (34) is covered with a high-temperature resistant insulating sleeve.

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