A direct-insertion silicon-molybdenum rod electric heating melting furnace

Abstract

The invention relates to the technical field of smelting furnaces, and discloses a direct-insertion silicon-molybdenum rod electric heating smelting furnace, comprising a furnace body and silicon-molybdenum heating rods, wherein a turntable is rotatably arranged inside the furnace body, and the silicon-molybdenum heating rods are installed on the turntable in a ring array; the smelting furnace is provided with a turntable, silicon-molybdenum heating rods and a driving mechanism, and when the smelting furnace is working, the silicon-molybdenum heating rods rotate while rotating with the turntable, so that the heat generated by the silicon-molybdenum rods can be transferred from multiple angles to a crucible placed in the middle of the smelting furnace and the metal material therein, which can improve the uniformity of heat distribution, improve the heating efficiency and avoid damage to the silicon-molybdenum heating rods and the crucible caused by local overheating; in addition, by providing a close mechanism, the silicon-molybdenum heating rods can be controlled to be close to the inner walls on both sides of the smelting furnace, so that when the crucible is placed and taken out, the crucible is avoided from colliding with the silicon-molybdenum heating rods, and the probability of damage to the silicon-molybdenum heating rods is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of smelting furnaces, in particular to a direct-insertion silicon-molybdenum rod electrically heated smelting furnace. Background Art

[0002] A smelting furnace is a device that melts metal ingots and some scrap metals and adds necessary alloy components, and then smelts them into the required alloys through operations such as slagging and refining. A silicon-molybdenum rod electric heating smelting furnace is a device that heats the inside of the smelting furnace with the heat generated by the silicon-molybdenum rods.

[0003] In the prior art, a box-type melting furnace usually inserts silicon-molybdenum rods into the interior of the melting furnace from the side or top of the melting furnace, so that a row of silicon-molybdenum rods are arranged on both sides of the interior of the melting furnace. However, since the crucible needs to be placed in the middle position inside the melting furnace, the distances between the silicon-molybdenum rods and the crucible at different positions are different. When heat is transferred to the surface of the crucible by thermal radiation, the heat loss increases with the increase of the distance, resulting in slight differences in the heated temperatures at different positions on the crucible surface, which causes the metal in the crucible to melt unevenly. At the same time, when heated for a long time at a fixed position, the silicon-molybdenum rods and the crucible may be damaged due to local overheating.

[0004] Chinese patent CN109186250B discloses a box-type resistance furnace with uniform heating. The resistance furnace drives the support plate to rotate through a motor, and the material is placed on the support plate for heating, so that the resistor fixedly installed on the inner wall of the box can heat the material evenly, compensating for the problem of local overheating or insufficient heat that may be caused by heating at a fixed position.

[0005] However, the method adopted by the above-mentioned resistance furnace cannot be used for a smelting furnace that completely melts the metal, because the metal after melting is easily affected by the centrifugal force during rotation and overflows from the crucible. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a direct-insertion silicon-molybdenum rod electric heating smelting furnace, which has the advantages of uniformly heating the crucible and the silicon-molybdenum rod without local overheating, and solves the problems mentioned in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A direct-insertion silicon-molybdenum rod electric heating smelting furnace, comprising a furnace body and silicon-molybdenum heating rods, wherein a turntable is rotatably arranged inside the furnace body, and the silicon-molybdenum heating rods are installed on the turntable in a ring array;

[0009] The rotating disk is provided with a rotating hole and a sliding hole, a positioning mounting block is fixedly installed inside the rotating hole, a movable mounting block is slidably installed inside the sliding hole, a rotating mounting joint is rotatably installed inside the positioning mounting block and the movable mounting block, and the silicon-molybdenum heating rod is detachably installed at the lower end of the rotating mounting joint;

[0010] The turntable is provided with a close mechanism, which includes a push plate, which is slidably mounted on the turntable, and when the push plate is away from the axis of the turntable, it pushes the movable mounting blocks on the same side to approach each other;

[0011] The furnace body is provided with a driving mechanism, which is used to drive the turntable to rotate, and at the same time, the silicon-molybdenum heating rod rotates around the rotating axis of the turntable while also rotating.

[0012] Preferably, a heating chamber is provided inside the furnace body, an equipment chamber is provided above the heating chamber, the equipment chamber and the heating chamber are separated by an insulation layer, the turntable and silicon-molybdenum heating rod are both provided inside the heating chamber, and the silicon-molybdenum heating rod is spaced from the inner side wall and inner bottom wall of the heating chamber.

[0013] Preferably, the approaching mechanism comprises a bidirectional threaded rod, both ends of the bidirectional threaded rod are rotatably mounted on the upper surface of the turntable, and both sides of the bidirectional threaded rod are threadedly connected with push plates, a slider is fixedly mounted on the lower surface of the push plate, a slide groove is provided on the upper surface of the turntable, the slide groove is slidably connected with the slider, and through grooves are provided on both sides of the push plate, a line connecting the sliding hole and the opposite end of the through groove is parallel to the length direction of the bidirectional threaded rod, and the sliding hole and the through groove are in opposite directions in the length direction;

[0014] The positioning mounting blocks are respectively arranged at both ends of the bidirectional threaded rod, and the movable mounting blocks on the same side are respectively slidably mounted in the slide grooves on both sides of the same push plate. When the push plate moves toward the end of the bidirectional threaded rod, the movable mounting block is pushed toward the positioning mounting block on the same side.

[0015] Preferably, the approaching mechanism also includes a driving assembly, which includes a transmission bevel gear, a lifting bevel gear, a mounting shaft, a slide cylinder, a rotating rod, a lifting rod, a control motor and an electric push rod. The transmission bevel gear is fixedly mounted at the middle position of the bidirectional threaded rod, the lifting bevel gear is arranged above the turntable, and the lifting bevel gear is adaptively meshed with the transmission bevel gear, the mounting shaft is fixedly mounted in the axial hole of the lifting bevel gear, the slide cylinder is fixedly mounted on the upper end of the mounting shaft, the lower end of the rotating rod is slidably connected to the inside of the slide cylinder, a connecting plate is fixedly mounted on one side of the lower end of the lifting rod, and the slide cylinder is rotatably mounted on the end of the connecting plate away from the lifting rod;

[0016] The control motor and the electric push rod are both installed inside the equipment cavity, the upper ends of the rotating rod and the lifting rod pass through the inner top wall of the heating cavity and extend to the interior of the equipment cavity, the rotating rod is rotatably connected to the inner top wall of the heating cavity, the lifting rod is slidably connected to the inner top wall of the heating cavity, the driving end of the control motor is transmission connected to the upper end of the rotating rod, and the driving end of the electric push rod is transmission connected to the upper end of the lifting rod.

[0017] Preferably, the driving mechanism includes an outer gear ring, a driving gear and a driving motor, the outer gear ring is fixedly mounted on the outer side of the turntable, the driving gear is meshingly connected with the outer gear ring, the driving motor is fixedly mounted inside the equipment cavity, and the driving end transmission of the driving motor is installed with a connecting shaft, and the connecting shaft is fixedly connected to the driving gear.

[0018] Preferably, the driving mechanism further comprises an inner gear ring, which is fixedly mounted inside the heating chamber, and an annular groove is formed on the upper surface of the inner gear ring, and a slip ring adapted to the annular groove is fixedly mounted on the lower surface of the turntable.

[0019] Preferably, a spur gear is fixedly mounted on the rotary mounting joint, and the spur gear is adaptively meshed with the internal gear ring.

[0020] Preferably, fan blades are provided below the turntable, a fan shaft is fixedly mounted on the fan blades, the fan shaft is rotatably connected to the lower surface of the turntable, and a driven gear is also fixedly mounted on the fan shaft, the driven gear is meshingly connected to the inner gear ring.

[0021] Preferably, a shielding frame is provided at the open end of the heating chamber, and an inclined opening end is provided on the outer side of the shielding frame. A furnace door is provided on one side of the furnace body, and the lower end of the furnace door is hingedly mounted to the open end of the furnace body, and a sealing baffle adapted to the inclined opening end is fixedly mounted on the inner side of the furnace door.

[0022] Preferably, the silicon-molybdenum heating rod includes a cold end and a hot end, and the two ends of the top of the hot end are integrally formed with a cold end. The diameter of the cold end is larger than the diameter of the hot end. The cold end and the rotating mounting joint are detachably installed. The lengths of the cold ends of adjacent silicon-molybdenum heating rods are the same, while the lengths of the hot ends are different.

[0023] Compared with the prior art, the present invention provides a direct-insertion silicon-molybdenum rod electric heating smelting furnace, which has the following beneficial effects:

[0024] 1. The direct-insert silicon-molybdenum rod electric heating melting furnace is provided with a turntable, a silicon-molybdenum heating rod and a driving mechanism. When the melting furnace is working, the silicon-molybdenum heating rod rotates while the turntable rotates, so that the heat generated by the silicon-molybdenum rod can be transferred from multiple angles to the crucible placed in the middle of the melting furnace and the metal material therein, which can improve the uniformity of heat distribution, improve the heating efficiency and avoid local overheating to damage the silicon-molybdenum heating rod and the crucible. In addition, by providing a close mechanism, the silicon-molybdenum heating rod can be controlled to be close to the inner walls on both sides of the melting furnace, so as to avoid collision between the crucible and the silicon-molybdenum heating rod when placing and removing the crucible, and reduce the probability of damage to the silicon-molybdenum heating rod.

[0025] 2. The direct-insert silicon-molybdenum rod electric heating melting furnace is provided with an outer gear ring, a driving gear, an inner gear ring and a flat gear. When the metal inside the crucible is melted, the outer gear ring is driven to rotate by the driving gear, so that the turntable rotates with the silicon-molybdenum heating rod. At the same time, when the silicon-molybdenum heating rod rotates, the flat gear installed on the rotating mounting joint rolls along the inner side surface of the inner gear ring, driving the silicon-molybdenum heating rod to rotate. Therefore, when the silicon-molybdenum heating rod rotates around the crucible, the heat generated by the silicon-molybdenum heating rod can be transferred to the crucible and the metal material therein from multiple angles, which helps to compensate for the problem of local overheating or insufficient heat that may be caused by heating at a fixed position, and makes the temperature of the metal in the crucible more uniform in the circumferential direction.

[0026] 3. The direct-insert silicon-molybdenum rod electric heating melting furnace can push the movable mounting block on the same side to move in the direction of the positioning mounting block by setting a push plate and a bidirectional threaded rod, so that all the silicon-molybdenum heating rods are moved to the two sides of the inside of the melting furnace respectively, and the passage for the crucible to enter and exit the melting furnace is cleared to avoid collision and contact between the crucible and the silicon-molybdenum heating rod. By setting a driving component including a transmission bevel gear, a lifting bevel gear, a mounting shaft, a slide cylinder, a rotating rod, a lifting rod, a control motor and an electric push rod, when the melting furnace is carrying out metal melting, the lifting bevel gear can be controlled to separate from the transmission bevel gear to avoid sliding of the silicon-molybdenum heating rod during rotation, thereby ensuring that all the silicon-molybdenum heating rods are kept at a consistent distance from the crucible, avoiding different distances between the silicon-molybdenum heating rods and the crucible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is one of the three-dimensional structural schematic diagrams of the direct-insertion type silicon-molybdenum rod electric heating melting furnace of the present invention;

[0028] Figure 2 This is one of the three-dimensional structural cross-sectional views of the direct-insertion type silicon-molybdenum rod electric heating melting furnace of the present invention;

[0029] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement at the center A;

[0030] Figure 4This is the second three-dimensional structural schematic diagram of the direct-insertion type silicon-molybdenum rod electric heating melting furnace of the present invention;

[0031] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlarged at B in the middle;

[0032] Figure 6 For the present invention Figure 4 A schematic diagram of the structure enlarged at C in the middle;

[0033] Figure 7 This is the second three-dimensional structural cross-sectional view of the direct-insertion type silicon-molybdenum rod electric heating smelting furnace of the present invention;

[0034] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at D in the middle is enlarged;

[0035] Fig. 9 This is the third three-dimensional structural cross-sectional view of the direct-insertion type silicon-molybdenum rod electric heating melting furnace of the present invention;

[0036] Fig.10 For the present invention Fig. 9 A schematic diagram of the structure enlarged at E in the middle;

[0037] Fig.11 This is the third schematic diagram of the three-dimensional structure of the direct-insertion silicon-molybdenum rod electric heating melting furnace of the present invention.

[0038] In the figure:

[0039] 1. furnace body; 11. heating chamber; 12. equipment chamber; 13. shielding frame; 14. inclined opening end;

[0040] 2. Turntable; 21. Rotating hole; 22. Sliding hole; 23. Positioning mounting block; 24. Moving mounting block; 25. Rotating mounting joint; 26. Sliding groove;

[0041] 3. Silicon molybdenum heating rod; 31. Cold end; 32. Hot end;

[0042] 4. Approaching mechanism; 41. Push plate; 42. Bidirectional threaded rod; 43. Through slot; 44. Driving assembly; 441. Transmission bevel gear; 442. Lifting bevel gear; 443. Mounting shaft; 444. Slide; 445. Rotating rod; 446. Lifting rod; 447. Control motor; 448. Electric push rod; 449. Connecting plate;

[0043] 5. Driving mechanism; 51. External gear ring; 52. Driving gear; 53. Driving motor; 54. Internal gear ring; 55. Annular groove; 56. Flat gear; 57. Connecting shaft;

[0044] 6. Fan blades; 61. Fan shaft; 62. Driven gear;

[0045] 7. Furnace door; 71. Sealing baffle. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0047] See also Figure 1 , Figure 3 and Fig. 9 The present invention provides a direct-insertion silicon-molybdenum rod electric heating smelting furnace, comprising a furnace body 1 and silicon-molybdenum heating rods 3, a turntable 2 is rotatably arranged inside the furnace body 1, and the silicon-molybdenum heating rods 3 are installed on the turntable 2 in a ring array;

[0048] The turntable 2 is provided with a rotating hole 21 and a sliding hole 22. A positioning mounting block 23 is fixedly installed inside the rotating hole 21. A movable mounting block 24 is slidably installed inside the sliding hole 22. A rotating mounting joint 25 is rotatably installed inside the positioning mounting block 23 and the movable mounting block 24. The silicon-molybdenum heating rod 3 is detachably installed at the lower end of the rotating mounting joint 25.

[0049] The turntable 2 is provided with a close mechanism 4, which includes a push plate 41, which is slidably mounted on the turntable 2, and when the push plate 41 is away from the axis of the turntable 2, it pushes the movable mounting blocks 24 on the same side to approach each other;

[0050] A driving mechanism 5 is provided on the furnace body 1 , and the driving mechanism 5 is used to drive the turntable 2 to rotate, and at the same time, the silicon-molybdenum heating rod 3 rotates around the rotation axis of the turntable 2 and also rotates.

[0051] As can be seen from the above, the direct-insert silicon-molybdenum rod electric heating melting furnace, by setting a turntable 2, a silicon-molybdenum heating rod 3 and a driving mechanism 5, when the melting furnace is working, the internal silicon-molybdenum heating rod 3 rotates while rotating with the turntable 2, so that the heat generated by the silicon-molybdenum rod 3 can be transferred from multiple angles to the crucible placed in the middle of the melting furnace and the metal material therein, thereby improving the uniformity of heat distribution, improving the heating efficiency and avoiding local overheating to damage the silicon-molybdenum heating rod 3 and the crucible, and at the same time, it can also avoid the metal liquid overflowing from the crucible. In addition, by setting the approaching mechanism 4, the silicon-molybdenum heating rod 3 can be controlled to be close to the inner walls on both sides of the melting furnace, thereby reducing the probability of contact and collision between the crucible and the silicon-molybdenum heating rod 3 when placing and removing the crucible, and avoiding damage to the silicon-molybdenum heating rod.

[0052] Specifically, in the prior art, the silicon-molybdenum heating rod 3 used in the smelting furnace is generally U-shaped, and the two power connection ends of the silicon-molybdenum heating rod 3 are close to each other, which results in that when the silicon-molybdenum heating rod 3 is in use, the two sides of the U-shape will heat each other, but the heat radiation emitted at the lower end of the silicon-molybdenum heating rod 3, that is, the bottom of the U-shape may be partially blocked by the two sides, resulting in a reduction in the heat radiation emitted toward the crucible. In addition, since the crucible and the metal material to be melted inside the crucible can absorb heat, and the heating chamber 11 used as the inside of the furnace body 1 is usually provided as a thermal insulation layer, the heat dissipation and absorption effect is poor, so that the silicon-molybdenum heating rod 3 is close to the side of the heated material, and the heat is dissipated faster; by providing a silicon-molybdenum heating rod 3 that can rotate and rotate around the crucible, when When the silicon-molybdenum heating rod 3 rotates around the crucible, the heat generated by the silicon-molybdenum heating rod 3 is transferred to the position of the crucible from multiple angles, making the temperature of the metal in the crucible more uniform in the circumferential direction. At the same time, the rotational movement of the silicon-molybdenum heating rod 3 can produce a certain convective heat transfer effect, so that the heat generated by the silicon-molybdenum heating rod 3 can be transferred to the crucible direction more quickly, thereby shortening the metal smelting cycle. In addition, when the silicon-molybdenum heating rod 3 only rotates around the crucible without rotating on its own, the silicon-molybdenum heating rod 3 always has only one side facing the crucible, which causes one side of the silicon-molybdenum heating rod 3 to dissipate heat quickly while the other side dissipates heat slowly. Therefore, by allowing the silicon-molybdenum heating rod 3 to rotate, different sides of the silicon-molybdenum heating rod 3 can face the crucible, thereby avoiding local overheating of the silicon-molybdenum heating rod 3.

[0053] When using the smelting furnace, first control all the silicon-molybdenum heating rods 3 to move to both sides of the furnace body 1 through the approaching mechanism 4, then put the crucible into the furnace body 1, and then move the silicon-molybdenum heating rods 3 back to their original positions, so that all the silicon-molybdenum heating rods 3 are in a circular array around the crucible, and then drive the silicon-molybdenum heating rods 3 to rotate and rotate around the crucible while generating heat through the driving mechanism 5. After smelting, take out the crucible. Example 2

[0054] like Figure 4 , Figure 5 , Fig. 9 and Fig.11 As shown, the difference between this embodiment and the above embodiment is that a heating chamber 11 is provided inside the furnace body 1, an equipment chamber 12 is provided above the heating chamber 11, the equipment chamber 12 and the heating chamber 11 are separated by an insulation layer, the turntable 2 and the silicon-molybdenum heating rod 3 are both provided inside the heating chamber 11, and there is a gap between the silicon-molybdenum heating rod 3 and the inner side wall and the inner bottom wall of the heating chamber 11.

[0055] Furthermore, the silicon-molybdenum heating rod 3 includes a cold end 31 and a hot end 32. The cold ends 31 are integrally formed at both ends of the top of the hot end 32. The diameter of the cold end 31 is larger than the diameter of the hot end 32. The cold end 31 and the rotating mounting joint 25 are detachably installed. The lengths of the cold ends 31 in adjacent silicon-molybdenum heating rods 3 are the same, while the lengths of the hot ends 32 are different.

[0056] As can be seen from the above, the rotating mounting joint 25 is used to connect the two ends of the U-shaped silicon-molybdenum heating rod 3. In fact, a wire or a conductive sheet for connecting the end of the cold end 31 should also be provided inside the rotating mounting joint 25. Then, the conductive ring device in the prior art is connected to the part of the rotating mounting joint 25 extending to the upper end of the turntable 2. This can power the silicon-molybdenum heating rod 3 that can rotate and rotate around the crucible. The rotating mounting joint 25 and the silicon-molybdenum heating rod 3 are detachably installed, which is convenient for replacing the silicon-molybdenum heating rod 3 as needed, so that the silicon-molybdenum heating rod 3 can be directly inserted into the rotating mounting joint 25, thereby achieving the purpose of direct plug-in installation of the silicon-molybdenum heating rod 3.

[0057] By setting the lengths of the hot ends 32 of adjacent silicon-molybdenum heating rods 3 to be different, when the silicon-molybdenum heating rods 3 rotate around the crucible, the heat emitted by the silicon-molybdenum heating rods 3 of different lengths can be concentrated to heat positions at different heights, so that the heat radiation amount at positions close to the height of the crucible is greater. Example 3

[0058] like Figure 1 , Figure 2 , Figure 3 and Fig.10 As shown, the difference between this embodiment and the above embodiment is that the approaching mechanism 4 includes a bidirectional threaded rod 42, both ends of the bidirectional threaded rod 42 are rotatably mounted on the upper surface of the turntable 2, and both sides of the bidirectional threaded rod 42 are threadedly connected with a push plate 41, and a slider is fixedly mounted on the lower surface of the push plate 41, and a slide groove 26 is provided on the upper surface of the turntable 2, and the slide groove 26 is slidably connected to the slider, and both sides of the push plate 41 are provided with a through groove 43, and the line connecting the opposite end of the slide hole 22 and the through groove 43 is parallel to the length direction of the bidirectional threaded rod 42, and the length directions of the slide hole 22 and the through groove 43 are opposite;

[0059] The positioning mounting blocks 23 are respectively arranged at both ends of the bidirectional threaded rod 42, and the movable mounting blocks 24 on the same side are respectively slidably installed in the slide grooves 26 on both sides of the same push plate 41. When the push plate 41 moves toward the end of the bidirectional threaded rod 42, it pushes the movable mounting block 24 to approach the positioning mounting block 23 on the same side.

[0060] As can be seen from the above, since the slider fixed on the push plate 41 is slidably connected to the slide groove 26 provided on the turntable 2, the push plate 41 can only move linearly. Therefore, when the bidirectional threaded rod 42 rotates, the push plate 41 threadedly connected thereto can be controlled to move linearly.

[0061] The approaching mechanism 4 also includes a driving assembly 44, which includes a transmission bevel gear 441, a lifting bevel gear 442, a mounting shaft 443, a slide 444, a rotating rod 445, a lifting rod 446, a control motor 447 and an electric push rod 448. The transmission bevel gear 441 is fixedly installed in the middle position of the bidirectional threaded rod 42, the lifting bevel gear 442 is arranged above the turntable 2, and the lifting bevel gear 442 is adaptively meshed with the transmission bevel gear 441, the mounting shaft 443 is fixedly installed in the axial hole of the lifting bevel gear 442, the slide 444 is fixedly installed at the upper end of the mounting shaft 443, the lower end of the rotating rod 445 is slidably connected to the inside of the slide 444, and a connecting plate 449 is fixedly installed on one side of the lower end of the lifting rod 446, and the slide 444 is rotatably installed on the connecting plate 449 away from the lifting rod 446.

[0062] As can be seen from the above, since the mounting shaft 443 is fixedly connected to the slide 444, the slide 444 is slidably connected to the rotating rod 445, and the mounting shaft 443 is fixedly connected to the lifting bevel gear 442, when the rotating rod 445 rotates, the mounting shaft 443 rotates with the lifting bevel gear 442. Since the slide 444 is rotatably installed on the connecting plate 449, and the connecting plate 449 is fixedly installed at the lower end of the lifting rod 446, the lifting rod 446 can drive the slide 444 to move up and down when it moves up and down. Since the lifting bevel gear 442 is adapted to mesh with the transmission bevel gear 441, when the lifting rod 446 moves downward so that the lifting bevel gear 442 is meshed with the transmission bevel gear 441, the rotating rod 445 rotates to drive the transmission bevel gear 441 to rotate, thereby driving the bidirectional threaded rod 42 fixedly connected to the transmission bevel gear 441 to rotate.

[0063] The control motor 447 and the electric push rod 448 are both installed inside the equipment cavity 12. The upper ends of the rotating rod 445 and the lifting rod 446 pass through the inner top wall of the heating cavity 11 and extend to the interior of the equipment cavity 12. The rotating rod 445 is rotatably connected to the inner top wall of the heating cavity 11, and the lifting rod 446 is slidably connected to the inner top wall of the heating cavity 11. The driving end of the control motor 447 is transmission-connected to the upper end of the rotating rod 445, and the driving end of the electric push rod 448 is transmission-connected to the upper end of the lifting rod 446.

[0064] It can be seen from the above that since the control motor 447 and the electric push rod 448 are both installed inside the equipment cavity 12, the heat resistance requirements of the control motor 447 and the electric push rod 448 can be reduced to a large extent, thereby avoiding the excessive cost of the control motor 447 and the electric push rod 448. In the present embodiment, the transmission structure between the driving end of the control motor 447 and the rotating rod 445 adopts a heat-resistant transmission pulley structure, and a metal plate with good heat dissipation effect or other materials with good heat insulation effect should also be used between the rod part of the electric push rod 448 and the upper end of the lifting rod 446 to avoid heat being directly introduced into the interior of the electric push rod 448. Example 4

[0065] like Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig.10 As shown, the difference between this embodiment and the above embodiment is that the driving mechanism 5 includes an outer gear ring 51, a driving gear 52 and a driving motor 53, the outer gear ring 51 is fixedly mounted on the outer side of the turntable 2, the driving gear 52 is meshingly connected with the outer gear ring 51, the driving motor 53 is fixedly mounted inside the equipment cavity 12, and the driving end of the driving motor 53 is transmission-installed with a connecting shaft 57, and the connecting shaft 57 is fixedly connected to the driving gear 52.

[0066] As can be seen from the above, when the driving motor 53 rotates, the driving connecting shaft 57 rotates, so that the driving gear 52 drives the outer gear ring 51 to rotate, thereby achieving the effect of driving the turntable 2 to rotate.

[0067] The driving mechanism 5 further comprises an inner gear ring 54 which is fixedly mounted inside the heating chamber 11 , and an annular groove 55 is formed on the upper surface of the inner gear ring 54 , and a slip ring adapted to the annular groove 55 is fixedly mounted on the lower surface of the turntable 2 .

[0068] As can be seen from the above, since the inner gear ring 54 is fixedly installed inside the heating chamber 11 and the slip ring is rotatably installed inside the annular groove 55 , the turntable 2 is rotatably installed above the inner gear ring 54 .

[0069] A flat gear 56 is fixedly mounted on the rotary mounting joint 25 , and the flat gear 56 is adapted to mesh with the inner gear ring 54 .

[0070] As can be seen from the above, by setting the flat gear 56, when the rotating mounting joint 25 rotates with the turntable 2, the flat gear 56 rolls with the inner tooth surface of the inner gear ring 54, driving the rotating mounting joint 25 to rotate, so that the silicon-molybdenum heating rod 3 can rotate while rotating with the turntable 2.

[0071] A fan blade 6 is provided below the turntable 2 , on which a fan shaft 61 is fixedly mounted. The fan shaft 61 is rotationally connected to the lower surface of the turntable 2 , and a driven gear 62 is also fixedly mounted on the fan shaft 61 , which is meshingly connected to the inner gear ring 54 .

[0072] As can be seen from the above, by providing the fan blades 6, the fan shaft 61 and the driven gear 62, the fan blades 6 can rotate while rotating along with the turntable 2, generating a certain wind force to stir the internal airflow of the heating chamber 11, so that the metal liquid in the crucible is slightly stirred. This stirring helps impurities and gases move to the surface and be discharged, thereby improving the purity of the molten metal. Example 5

[0073] like Fig. 9 and Fig.11 As shown, the difference between this embodiment and the above embodiment lies in that a shielding frame 13 is provided at the open end of the heating chamber 11, and an inclined opening end 14 is provided on the outer side of the shielding frame 13, and a furnace door 7 is provided on one side of the furnace body 1, and the lower end of the furnace door 7 is hingedly mounted to the open end of the furnace body 1, and a sealing baffle 71 adapted to the inclined opening end 14 is fixedly mounted on the inner side of the furnace door 7.

[0074] As can be seen from the above, by setting the shielding frame 13, the opening area of ​​the heating chamber 11 is reduced, the speed of heat loss is reduced, and at the same time, shielding is provided for the silicon-molybdenum heating rods 3 on both sides of the heating chamber 11, thereby reducing the probability of collision between the crucible and the silicon-molybdenum heating rods 3. By setting the inclined opening end 14 and the sealing baffle 71, the area of ​​the sealing surface is increased, thereby improving the sealing effect.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A direct-insertion silicon-molybdenum rod electric heating melting furnace, comprising a furnace body and a silicon-molybdenum heating rod, characterized in that: A turntable is rotatably arranged inside the furnace body, and the silicon-molybdenum heating rods are installed on the turntable in a circular array; The rotating disk is provided with a rotating hole and a sliding hole, a positioning mounting block is fixedly installed inside the rotating hole, a movable mounting block is slidably installed inside the sliding hole, a rotating mounting joint is rotatably installed inside the positioning mounting block and the movable mounting block, and the silicon-molybdenum heating rod is detachably installed at the lower end of the rotating mounting joint; The turntable is provided with a close mechanism, which includes a push plate, which is slidably mounted on the turntable, and when the push plate is away from the axis of the turntable, it pushes the movable mounting blocks on the same side to approach each other; The furnace body is provided with a driving mechanism, which is used to drive the turntable to rotate, and at the same time, the silicon-molybdenum heating rod rotates around the rotating axis of the turntable while also rotating.

2. The direct-insertion silicon-molybdenum rod electric heating melting furnace according to claim 1 is characterized in that: A heating chamber is arranged inside the furnace body, an equipment chamber is arranged above the heating chamber, the equipment chamber and the heating chamber are separated by an insulating layer, the turntable and the silicon-molybdenum heating rod are arranged inside the heating chamber, and the silicon-molybdenum heating rod is spaced from the inner side wall and the inner bottom wall of the heating chamber.

3. The direct-insertion silicon-molybdenum rod electric heating melting furnace according to claim 1 is characterized in that: The approaching mechanism comprises a bidirectional threaded rod, both ends of the bidirectional threaded rod are rotatably mounted on the upper surface of the rotating disk, and both sides of the bidirectional threaded rod are threadedly connected with push plates, a slider is fixedly mounted on the lower surface of the push plate, a slide groove is provided on the upper surface of the rotating disk, the slide groove is slidably connected with the slider, and both sides of the push plate are provided with through grooves, a line connecting the sliding hole and the opposite end of the through groove is parallel to the length direction of the bidirectional threaded rod, and the sliding hole and the through groove are in opposite directions in the length direction; The positioning mounting blocks are respectively arranged at both ends of the bidirectional threaded rod, and the movable mounting blocks on the same side are respectively slidably mounted in the slide grooves on both sides of the same push plate. When the push plate moves toward the end of the bidirectional threaded rod, the movable mounting block is pushed toward the positioning mounting block on the same side.

4. The direct-insertion silicon-molybdenum rod electric heating melting furnace according to claim 2 is characterized in that: The approaching mechanism also includes a driving assembly, which includes a transmission bevel gear, a lifting bevel gear, a mounting shaft, a slide cylinder, a rotating rod, a lifting rod, a control motor and an electric push rod. The transmission bevel gear is fixedly mounted at the middle position of the bidirectional threaded rod, the lifting bevel gear is arranged above the turntable, and the lifting bevel gear is adaptively meshed with the transmission bevel gear, the mounting shaft is fixedly mounted in the axial hole of the lifting bevel gear, the slide cylinder is fixedly mounted on the upper end of the mounting shaft, the lower end of the rotating rod is slidably connected to the inside of the slide cylinder, a connecting plate is fixedly mounted on one side of the lower end of the lifting rod, and the slide cylinder is rotatably mounted on the end of the connecting plate away from the lifting rod; The control motor and the electric push rod are both installed inside the equipment cavity, the upper ends of the rotating rod and the lifting rod pass through the inner top wall of the heating cavity and extend to the interior of the equipment cavity, the rotating rod is rotatably connected to the inner top wall of the heating cavity, the lifting rod is slidably connected to the inner top wall of the heating cavity, the driving end of the control motor is transmission connected to the upper end of the rotating rod, and the driving end of the electric push rod is transmission connected to the upper end of the lifting rod.

5. The direct-insertion type silicon-molybdenum rod electric heating melting furnace according to claim 1, characterized in that: The driving mechanism includes an outer gear ring, a driving gear and a driving motor. The outer gear ring is fixedly mounted on the outer side of the turntable, the driving gear is meshed with the outer gear ring, the driving motor is fixedly mounted inside the equipment cavity, and the driving end of the driving motor is transmission-mounted with a connecting shaft, which is fixedly connected to the driving gear.

6. The direct-insertion silicon-molybdenum rod electric heating melting furnace according to claim 1, characterized in that: The driving mechanism also includes an inner gear ring, which is fixedly installed inside the heating chamber, and an annular groove is provided on the upper surface of the inner gear ring. A slip ring adapted to the annular groove is fixedly installed on the lower surface of the turntable.

7. The direct-insertion type silicon-molybdenum rod electric heating melting furnace according to claim 5, characterized in that: A spur gear is fixedly mounted on the rotary mounting joint, and the spur gear is adapted to mesh with the inner gear ring.

8. The direct-insertion type silicon-molybdenum rod electric heating melting furnace according to claim 6, characterized in that: A fan blade is arranged below the turntable, a fan shaft is fixedly mounted on the fan blade, the fan shaft is rotationally connected to the lower surface of the turntable, and a driven gear is also fixedly mounted on the fan shaft, and the driven gear is meshingly connected to the inner gear ring.

9. The direct-insertion type silicon-molybdenum rod electric heating melting furnace according to claim 2, characterized in that: A shielding frame is provided at the open end of the heating chamber, and an inclined opening end is provided on the outer side of the shielding frame. A furnace door is provided on one side of the furnace body, and the lower end of the furnace door is hingedly installed with the open end of the furnace body, and a sealing baffle adapted to the inclined opening end is fixedly installed on the inner side of the furnace door.

10. The direct-insertion silicon-molybdenum rod electric heating melting furnace according to claim 1, characterized in that: The silicon-molybdenum heating rod includes a cold end and a hot end. The two ends of the top of the hot end are integrally formed with a cold end. The diameter of the cold end is larger than the diameter of the hot end. The cold end and the rotating mounting joint are detachably mounted. The lengths of the cold ends of adjacent silicon-molybdenum heating rods are the same, while the lengths of the hot ends are different.

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