Smelting crucible and tundish integrated device and powder making equipment

Abstract

The utility model provides a smelting crucible and tundish integrated device and powder making equipment, and relates to the technical field of powder making equipment, the smelting crucible and tundish integrated device comprises a smelting crucible, the smelting crucible is a hollow cylinder with a discharge port at the bottom, and an induction coil is arranged on the outer side face of the smelting crucible; the plug pulling rod is arranged in the smelting crucible, the length of the plug pulling rod is larger than the height of the smelting crucible, the diameter of the plug pulling rod is matched with a discharging port in the bottom of the smelting crucible, and an atomizing nozzle is arranged below the discharging port in the bottom of the smelting crucible; the power assembly comprises a plug pulling arm and a plug pulling power source, and the plug pulling rod is connected with the plug pulling power source through the plug pulling arm; the smelting system is automatically lifted and is convenient to disassemble and assemble; the method has the advantages that the powder preparation process is simple and convenient to operate, one-button starting and stopping functions are achieved, the automation and intelligence degree is high, and process deviation caused by human factors is reduced.

Description

Technical Field

[0001] The utility model relates to a smelting crucible and tundish integrated device and powder making equipment, belonging to the technical field of powder making equipment. Background Art

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, and then forms and sinters it to produce metal materials, composite materials and various types of products. Powder metallurgy technology has the advantages of significant energy saving, material saving, excellent performance, high product precision and good stability. Even some materials that cannot be prepared by traditional casting methods and mechanical processing methods and parts that are difficult to process can be prepared by powder metallurgy technology, so it is highly valued.

[0003] Traditional powder metallurgy materials include: iron-based powder, copper-based powder, refractory metals and hard alloys, electrical materials, sintered friction and anti-friction materials. Initially, they were developed for the improvement, replacement and development of economy, processability and usability. With the in-depth study of powder metallurgy, people have discovered many excellent properties and special functions of powder metallurgy materials. New achievements and applications are constantly emerging, and powder materials have become a research hotspot.

[0004] Existing atomizing powder making equipment, such as the gas atomizing device disclosed in Chinese patent CN111889690B, includes a smelting chamber and an atomizing chamber. A crucible and a tundish system are provided in the smelting chamber. During production, the molten metal is first heated in the crucible, and then the crucible is tilted to pour the molten metal into the tundish system. The tundish system then injects the molten metal into the atomizing chamber for atomization. Therefore, the manufacturing process cost is high, the inert gas is seriously wasted in the powder making process, and the powder making cost is high. In addition, the existing atomizing powder making equipment has a low degree of automation and is difficult to disassemble. Utility Model Content

[0005] The utility model aims at the deficiencies in the prior art and provides an integrated device of a smelting crucible and a tundish, comprising: a smelting crucible, which is a hollow cylinder with a discharge port at the bottom, and an induction coil is arranged on the outer side of the smelting crucible; a plugging rod, which is arranged in the smelting crucible, the length of which is greater than the height of the smelting crucible, the diameter of which matches the discharge port at the bottom of the smelting crucible, and an atomizing nozzle is arranged below the discharge port at the bottom of the smelting crucible; and a power assembly, which comprises a plugging arm and a plugging power source, and the plugging rod is connected to the plugging power source through the plugging arm.

[0006] Furthermore, the outer circle of the bottom of the plug rod matched with the discharge port of the smelting crucible is chamfered to seal with the discharge port of the smelting crucible.

[0007] Furthermore, it also includes: a furnace body, the smelting crucible, the plug rod, and the power assembly are all located in the furnace body, the bottom of the furnace body is connected to an atomizing barrel cover plate, and the atomizing nozzle passes through the atomizing barrel cover plate; a furnace cover, the furnace cover is buckled on the upper part of the furnace body; and a lifting mechanism, the furnace body, the atomizing barrel cover plate, and the furnace cover are all connected to the lifting mechanism.

[0008] Furthermore, the lifting mechanism includes: a servo electric cylinder, a thrust plate is fixedly connected to the servo electric shaft of the servo electric cylinder; a fixed guide shaft, a slide sleeve 1, a slide sleeve 2, and a slide sleeve 3 are fixedly connected to the fixed guide shaft, the slide sleeve 1 is connected to the atomization barrel cover plate through a connecting piece 1, the slide sleeve 2 is connected to the furnace body through a connecting piece 2, and the slide sleeve 3 is connected to the furnace cover through a connecting piece 3.

[0009] Furthermore, the height of the second connector is greater than the height of the third connector, and the height of the third connector is greater than the height of the first connector.

[0010] Furthermore, the connecting member 1 is welded to the atomization barrel cover plate, the connecting member 2 is welded to the furnace body, and the connecting member 3 is welded to the furnace cover.

[0011] Furthermore, the diameter of the plug rod is 1 / 10-1 / 7 of the inner diameter of the smelting crucible, and the depth and width of the chamfer of the plug rod are 1 / 5-1 / 3 of the diameter of the plug rod.

[0012] Furthermore, there are two plug-pulling power sources located at two ends of the plug-pulling arm.

[0013] Furthermore, the axis of the corkscrew rod overlaps with the axis of the smelting crucible.

[0014] Another aspect of the utility model provides a powder making device, comprising the above-mentioned integrated device, and further comprising an atomizing barrel, wherein the atomizing barrel is connected below the atomizing nozzle.

[0015] The beneficial effects of the utility model include:

[0016] (1) The powder making equipment made by the utility model has the characteristics of light weight and compact structure.

[0017] (2) The melting crucible and the tundish are designed to be integrated. The plugging rod is connected to the plugging power source through the plugging arm. The plugging arm, the plugging rod and the plugging power source are flexible connections, and can be moved up and down, left and right to adjust the position within a certain range. Before loading, the power shaft of the plugging power source generates an upward thrust. According to the principle of the seesaw motion mechanism, the center position of the plugging arm will generate downward pressure, so that the plugging rod blocks the leakage hole of the melting crucible, and if there is a deviation in the position, it can also be manually fine-tuned; after adding an appropriate amount of raw materials into the melting crucible, the melting crucible is heated by the induction coil to completely melt the raw materials into molten metal at high temperature. The power shaft of the plug pulling power source, such as a cylinder, generates a pulling force downward. According to the seesaw motion mechanism principle, an upward pulling force is generated at the center of the plug pulling arm, and the plug pulling rod leaves the discharge port. The molten metal flows into the atomizing nozzle after passing through the discharge port. The molten metal is impacted and broken by the high-pressure gas in the atomizing nozzle, and the molten metal is atomized into fine droplets. The droplets are quickly cooled and solidified into spherical metal powder in the atomizing furnace.

[0018] (3) The utility model removes the insulating crucible of the tundish, which not only greatly reduces the production cost, but also greatly shortens the powder making time by setting the plug rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the integrated structure of a smelting crucible and a tundish provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the partial structure of a flour milling device provided in an embodiment of the utility model;

[0022] Figure 3 A top view of the integrated lifting structure of the smelting crucible and tundish provided in an embodiment of the utility model;

[0023] Figure 4 The embodiment of the utility model provides Figure 3 The cross-sectional view in CC direction;

[0024] Figure 5 The embodiment of the utility model provides Figure 3 The main view of the structure;

[0025] Figure 6This is a schematic diagram of the plug-pulling rod structure provided in an embodiment of the utility model.

[0026] Figure numerals: 1. raw material; 2. plug rod; 3. smelting crucible; 31. discharge port; 4. atomizing nozzle; 5. plug arm; 6. plug power source; 7. induction coil; 8. furnace body; 9. atomizing chamber upper cover plate; 10. furnace cover; 11. atomizing barrel; 12. fixed guide shaft; 13. servo electric cylinder; 14. servo electric shaft; 15. thrust plate; 16. sleeve one; 17. sleeve two; 18. sleeve three; 19. connector one; 20. connector two; 21. connector three. DETAILED DESCRIPTION

[0027] The following is a detailed description of the specific implementation of the utility model. The utility model can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used are only for describing specific implementations and do not limit the present invention.

[0029] The utility model provides a melting crucible 3 and a tundish integrated device, such as Figure 1 As shown, it comprises: a smelting crucible 3, which is a hollow cylinder with a discharge port 31 at the bottom, and an induction coil 7 is arranged on the outer surface of the smelting crucible 3; a plug rod 2, which is arranged in the smelting crucible 3, the length of the plug rod 2 is greater than the height of the smelting crucible 3, the diameter of the plug rod 2 matches the discharge port 31 at the bottom of the smelting crucible 3, and an atomizing nozzle 4 is arranged below the discharge port 31 at the bottom of the smelting crucible 3; a power assembly, which comprises a plug arm 5 and a plug power source 6, and the plug rod 2 is connected to the plug power source 6 through the plug arm 5.

[0030] The utility model provides an integrated device for melting crucible 3 and tundish. The powder making equipment made by using the integrated device for melting crucible 3 and tundish has the characteristics of light weight and compact structure. The melting crucible 3 and the tundish are designed to be integrated. The plugging rod 2 is connected to the plugging power source 6 through the plugging arm 5. The plugging arm 5 and the plugging rod 2 and the plugging power source 6 are flexibly connected. Within a certain range, the position can be adjusted by moving up, down, left, and right.

[0031] Before loading, the power shaft of the plugging power source 6 generates an upward thrust. According to the seesaw motion mechanism principle, a downward pressure is generated at the center of the plugging arm 5, so that the plugging rod 2 blocks the leak of the melting crucible 3, and if the position is deviated, manual fine adjustment can be performed. After adding an appropriate amount of raw material 1 into the melting crucible 3, the melting crucible 3 is heated by the induction coil 7, and the raw material 1 is completely melted into molten metal at a high temperature. The power shaft of the plug-pulling power source 6, such as a cylinder, generates a pulling force downward. Similarly, according to the principle of the seesaw motion mechanism, the center position of the plug-pulling arm 5 will generate an upward pulling force, and the plug-pulling rod 2 will leave the discharge port 31; the molten metal flows into the atomizing nozzle 4 after passing through the discharge port 31, and the molten metal is impacted and crushed by the high-pressure gas in the atomizing nozzle 4, so that the molten metal is atomized into fine droplets, and the droplets are quickly cooled and solidified into spherical metal powder in the atomizing furnace; the utility model does not require the insulation crucible of the tundish, which not only greatly reduces the production cost, but also greatly shortens the powder making time by the provision of the plug-pulling rod 2.

[0032] As a preferred solution, the outer circle of the bottom of the plug rod 2 that matches with the discharge port 31 of the melting crucible 3 is chamfered to seal with the discharge port 31 of the melting crucible 3 .

[0033] The plug rod 2 must ensure that the leak hole of the melting crucible 3 is sealed. The plug rod 2 and the hole of the melting crucible 3 are chamfered to achieve both positioning and sealing.

[0034] Preferably, if Figure 3 and Figure 4 As shown, it also includes: a furnace body 8, the smelting crucible 3, the plug rod 2, and the power assembly are all located in the furnace body 8, the bottom of the furnace body 8 is connected to an atomizing barrel 11 cover, and the atomizing nozzle 4 passes through the atomizing barrel 11 cover; a furnace cover 10, the furnace cover 10 is buckled on the upper part of the furnace body 8; a lifting mechanism, the furnace body 8, the atomizing barrel 11 cover, and the furnace cover 10 are all connected to the lifting mechanism.

[0035] By placing the melting crucible 3 and the like in the furnace body 8, on the one hand, the melting crucible 3 and the like can be better insulated, and on the other hand, by introducing inert gas into the furnace body 8, it is more conducive to protecting the melting material. By setting the lifting mechanism, the furnace body 8, the cover plate of the atomizing barrel 11 and the furnace cover 10 can be conveniently moved up and down.

[0036] Preferably, the lifting mechanism includes: a servo electric cylinder 13, a thrust plate 15 is fixedly connected to the servo electric shaft 14 of the servo electric cylinder 13; a fixed guide shaft 12, a slide sleeve 16, a slide sleeve 2 17, and a slide sleeve 3 18 are fixedly connected to the fixed guide shaft 12, the slide sleeve 16 is connected to the cover plate of the atomization barrel 11 through a connecting piece 19, the slide sleeve 2 17 is connected to the furnace body 8 through a connecting piece 20, and the slide sleeve 3 18 is connected to the furnace cover 10 through a connecting piece 3 21.

[0037] The shaft of the servo electric cylinder 13 moves up and down within the stroke. The shaft of the servo electric cylinder 13 is fixed to the thrust plate 15. The thrust plate 15 is fixed to the sliding sleeve 16. The sliding sleeve 16 is fixed to the connecting piece 19. The connecting piece 19 is welded to the cover of the atomizing barrel 11. When the servo electric cylinder 13 drives the sliding sleeve 16 to move upward, the cover of the atomizing barrel 11 rises to a certain height. During the rising process, after the sliding sleeve 16 contacts with the sliding sleeve 2 17, the thrust will be transmitted to the sliding sleeve 2 17. The sliding sleeve 2 17 is fixed to the connecting piece 2 20. The connecting piece 20 is welded to the furnace body 8, so that the furnace body 8 is lifted to a certain height. In the same way, after the sliding sleeve 2 17 contacts with the sliding sleeve 3 18, the furnace cover 10 will be lifted under the action of the thrust. The principle of the furnace cover 10, furnace body 8, and atomizing barrel 11 cover plate falling is that when the servo electric cylinder 13 is axially contracted downward, the support surface between the sliding sleeve 16, the sliding sleeve 2 17, and the sliding sleeve 3 18 is lost, and they return to their original positions under the action of their own gravity.

[0038] The servo electric cylinder 13 drives the thrust plate 15, and the thrust plate 15 drives the sliding sleeve, which is welded and fixed to the atomizing chamber upper cover plate 9, the furnace body 8, and the furnace head, so that the atomizing chamber upper cover plate 9, the furnace body 8, and the furnace head can be moved up and down. The servo electric cylinder 13 drives the furnace cover 10, the furnace body 8, and the atomizing chamber upper cover plate 9 to move to the specified height, and then uses the lever principle to easily manually move the furnace head, the furnace body, and the atomizing chamber upper cover plate 9 horizontally, so that it moves in a circle with the fixed guide shaft 12 as the center; the furnace cover 10, the furnace body 8, and the atomizing chamber upper cover plate 9 automatically rise and fall and move horizontally manually, so that the equipment is easy to disassemble, repair, and clean.

[0039] As a preferred solution, the height of the second connecting member 20 is greater than the height of the third connecting member 21 , and the height of the third connecting member 21 is greater than the height of the first connecting member 19 .

[0040] Preferably, if Figure 5 As shown, the middle of the second connector 20 and the third connector 21 is provided with an elliptical hollow with the long axis in the vertical direction, and the height of the ellipse is 1 / 3-1 / 5 of the height of the connector where it is located. This structural setting, on the one hand, reduces the weight of the connector while ensuring the rigidity of the connector; on the other hand, it can increase the deformation allowance of the rigid connection.

[0041] Preferably, the connecting piece 19 is welded to the cover plate of the atomizing barrel 11 , the connecting piece 20 is welded to the furnace body 8 , and the connecting piece 3 21 is welded to the furnace cover 10 .

[0042] Welding, on the one hand, has good connectivity, making it convenient to connect parts of cylinders of different shapes and sizes, thereby reducing the overall weight and saving materials; on the other hand, the welded structure has high rigidity and good integrity, which greatly improves the safety factor during the lifting process.

[0043] Preferably, the diameter of the plug rod 2 is 1 / 10-1 / 7 of the inner diameter of the smelting crucible 3 , and the depth and width of the chamfer of the plug rod 2 are 1 / 5-1 / 3 of the diameter of the plug rod 2 .

[0044] By setting the chamfer, the sealing between the melting crucible 3 and the plug rod 2 can be further improved. The selection of the chamfer size directly affects the sealing between the melting crucible 3 and the plug rod 2 and the service life. Through experimental research, it is found that when the diameter of the plug rod 2 is 1 / 10-1 / 7 of the inner diameter of the melting crucible 3, and the depth and width of the chamfer of the plug rod 2 are 1 / 5-1 / 3 of the diameter of the plug rod 2, the plug rod 2 has the best sealing performance and a longer service life.

[0045] It should be noted that the chamfer here specifically refers to the chamfer between the outer side and the lower side of the plug rod 2, the depth of the chamfer specifically refers to the chamfer length from the bottom surface of the plug rod 2 to the side surface of the plug rod 2, and the width of the chamfer specifically refers to the chamfer length from the side surface of the plug rod 2 to the bottom surface of the plug rod 2. Figure 6 As shown, the depth of the chamfer is H and the width of the chamfer is L.

[0046] Preferably, there are two plug-pulling power sources 6 located at both ends of the plug-pulling arm 5. Figure 1 As shown, the plug-pulling power source 6 is provided as a single one, and as an alternative, it can also be provided as two. Providing two plug-pulling power sources 6 can, on the one hand, increase the plug-in and pull-out force of the plug-pulling rod 2; on the other hand, it can balance the force between the plug-pulling arms 5, making it easier to position and plug-in the plug-pulling rods 2.

[0047] Preferably, the axis of the corkscrew rod 2 overlaps with the axis of the melting crucible 3 .

[0048] The beneficial effect of this technical solution is that the force between the melting crucible 3 and the plugging rod 2 can be further balanced.

[0049] Another aspect of the present invention provides a powder making device, comprising the above-mentioned integrated device, and further comprising an atomizing barrel 11 , wherein the atomizing barrel 11 is connected below the furnace body 8 .

[0050] The powder making equipment provided by the utility model has a compact structure and a high degree of automation, and belongs to small vacuum induction atomization powder making equipment. The powder making equipment has a low manufacturing cost.

[0051] It should be noted that the device also includes a control system, and the lifting mechanism and the melting crucible 3 and the tundish integrated device are all controlled by the control system to control the temperature rise and fall, spatial movement, etc., to achieve a high degree of automation. The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not exhaustively listed. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] For those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, all of which belong to the protection scope of the present invention. The protection scope of the present invention shall be based on the attached claims.

Claims

1. A melting crucible and tundish integrated device, characterized in that: include: A smelting crucible, wherein the smelting crucible is a hollow cylinder with a discharge port at the bottom, and an induction coil is provided on the outer surface of the smelting crucible; A plug rod, the plug rod is arranged in the smelting crucible, the length of the plug rod is greater than the height of the smelting crucible, the diameter of the plug rod matches the discharge port at the bottom of the smelting crucible, and an atomizing nozzle is arranged below the discharge port at the bottom of the smelting crucible; A power assembly comprises a plug-pulling arm and a plug-pulling power source, wherein the plug-pulling rod is connected to the plug-pulling power source via the plug-pulling arm.

2. The integrated device according to claim 1, characterized in that: The outer circle of the bottom of the plug rod matched with the discharge port of the smelting crucible is provided with a chamfer, and is sealed and matched with the discharge port of the smelting crucible.

3. The integrated device according to claim 1, characterized in that: Also includes: A furnace body, wherein the smelting crucible, the plug rod, and the power assembly are all located in the furnace body, an atomizing barrel cover plate is connected to the bottom of the furnace body, and the atomizing nozzle penetrates the atomizing barrel cover plate; A furnace cover, which is buckled on the upper part of the furnace body; A lifting mechanism, wherein the furnace body, the atomizing barrel cover plate and the furnace cover are all connected to the lifting mechanism.

4. The integrated device according to claim 3, characterized in that: The lifting mechanism comprises: A servo electric cylinder, wherein a thrust plate is fixedly connected to a servo electric shaft of the servo electric cylinder; A fixed guide shaft, on which a sliding sleeve 1, a sliding sleeve 2 and a sliding sleeve 3 are fixedly connected, wherein the sliding sleeve 1 is connected to the atomization barrel cover plate through a connecting piece 1, the sliding sleeve 2 is connected to the furnace body through a connecting piece 2, and the sliding sleeve 3 is connected to the furnace cover through a connecting piece 3.

5. The integrated device according to claim 4, characterized in that: The height of the second connecting member is greater than the height of the third connecting member, and the height of the third connecting member is greater than the height of the first connecting member.

6. The integrated device according to claim 4, characterized in that: The first connecting piece is welded to the atomizing barrel cover plate, the second connecting piece is welded to the furnace body, and the third connecting piece is welded to the furnace cover.

7. The integrated device according to claim 1, characterized in that: The diameter of the plug rod is 1 / 10-1 / 7 of the inner diameter of the smelting crucible, and the depth and width of the chamfer of the plug rod are 1 / 5-1 / 3 of the diameter of the plug rod.

8. The integrated device according to claim 1, characterized in that: There are two plug-pulling power sources located at two ends of the plug-pulling arm.

9. The integrated device according to claim 1, characterized in that: The axis of the corkscrew rod overlaps with the axis of the melting crucible.

10. A flour making device, characterized in that: The integrated device comprises the integrated device according to any one of claims 1 to 9, and further comprises an atomizing barrel, wherein the atomizing barrel is connected below the atomizing nozzle.

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