High temperature alloy tube casting machine

Abstract

The present invention belongs to the technical field of alloy tube preparation, and specifically discloses a high-temperature alloy tube melter, comprising a crucible and a tube former fixedly connected to the crucible; the crucible is open at the top, and the bottom is connected to the tube former; a heating system is arranged circumferentially on the outer side of the crucible; the tube former is a hollow structure with openings at both ends, a first guide tube is arranged inside the hollow structure, a second guide tube is fixedly arranged at the bottom of the first guide tube, and the first guide tube and the second guide tube are connected; a solid column is arranged inside the first guide tube, and the solid column is integrally formed with the first guide tube. The present invention can prepare alloy tubes of the required size in one step, reducing the error rate of multiple processes and multiple stations, and also reducing many intermediate links and process equipment, thereby reducing costs; and alloy tubes with different wall thicknesses can be prepared by replacing the solid column, thereby improving the production efficiency of alloy tubes.

Description

Technical Field

[0001] The invention belongs to the technical field of alloy tube preparation, and in particular relates to a high-temperature alloy tube melting and casting device. Background Art

[0002] When traditional stainless steel pipes are prepared, the raw materials are purchased from large steel mills such as Anshan Iron and Steel, Shougang, and Wuhan Iron and Steel. Stainless steel of corresponding width is cut according to the circumference of the round, square or rectangular tube, and then the steel strip is processed into round and square tubes.

[0003] To produce a round tube, a stainless steel strip is first rolled with rollers to warp the ends. The rollers then rotate and press the plate formed in the previous step, forcing the ends of the plate into a defined circle within the mold. Continued rolling bends the strip into a shape closer to the finished round tube, shortening the joints. The plate is rolled into a round tube and fed forward. An argon arc welding torch is then used to weld the two ends of the plate together, completing the tube.

[0004] When making square tubes, four rollers with a defined arc are used to press the round tube into a tube similar to a square tube. Flat-ended rollers are then used to completely press the tube made in the previous step into a square tube. Rectangular tubes are also made using the same process as round tubes. Weld seam description: When pressing square tubes, the weld seam is approximately 10mm from the right angle. For rectangular tubes, the weld seam is approximately 10mm from the right angle on the narrow side.

[0005] The production process for thick-walled seamless pipe is more complex; solid billets are first prepared, then threaded into pipes, and then rolled repeatedly until the target size is achieved. This method of pipe production is more expensive and less efficient than the previous method. This means that production cannot be increased without cost reduction, which is a major factor restricting the development of stainless steel pipe in my country.

[0006] Therefore, providing a new high-temperature alloy tube melter is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0007] The purpose of the present invention is to overcome the defects of high cost and low efficiency in the prior art of stainless steel pipe production, and to provide a high-temperature alloy pipe melting and casting device.

[0008] The present invention provides a high-temperature alloy tube melter, comprising a crucible and a tube former fixedly connected to the crucible;

[0009] The crucible has an opening at the top and a bottom connected to the tube former;

[0010] A heating system is provided on the outer circumference of the crucible, and the heating system is fixedly connected to the crucible;

[0011] The tube former is a hollow structure with two ends open, a first guide tube is provided inside the hollow structure, and the first guide tube is coaxially arranged with the hollow structure;

[0012] A second guide tube is fixedly provided at the bottom of the first guide tube, and the first guide tube and the second guide tube are connected; a solid column is provided inside the first guide tube, and the solid column is integrally formed with the first guide tube, and the bottom end of the solid column extends into the inside of the second guide tube.

[0013] A further solution is that the heating system is a high frequency induction heating copper tube;

[0014] The high-frequency induction heating copper tube is wound around the crucible;

[0015] Cooling water is provided inside the high-frequency induction heating copper tube.

[0016] A further solution is that a thermal insulation layer is provided between the crucible and the high-frequency induction heating copper tube, and the thermal insulation layer is fixedly connected to the crucible and the high-frequency induction heating copper tube respectively.

[0017] A further solution is that a conical structure is provided between the first guide tube and the second guide tube, the top of the conical structure is fixedly connected to the first guide tube, and the bottom is fixedly connected to the second guide tube;

[0018] The solid column and the tapered structure are formed integrally.

[0019] A further solution is that the conical structure is formed by weaving a plurality of spirally arranged pipes, the top of the pipe is connected to the inner wall of the first guide pipe, and the bottom of the pipe is connected to the inner wall of the second guide pipe.

[0020] A further solution is that a high-frequency induction heating copper tube is circumferentially wound around the outer wall of the tube former, and the high-frequency induction heating copper tube is coaxially arranged and fixedly connected to the tube former.

[0021] A further solution is that a cooling water pipe is fixedly provided on the outer wall of the tube former near the bottom end, and the outlet of the cooling water pipe is located inside the hollow structure and does not contact the outer wall of the second guide tube.

[0022] A further solution is that a cover plate is provided on the top of the crucible, and the cover plate is movably connected to the crucible.

[0023] A further solution is that the insulation layer includes a zirconia brick layer and a zirconia fiber cotton layer, the zirconia brick layer is on the side close to the crucible, and the zirconia fiber cotton layer is on the side close to the high-frequency induction heating copper tube.

[0024] A further solution is that the crucible and the tube former are both made of tungsten or molybdenum.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention can produce alloy tubes of the required size in one step through the cooperation of the solid column and the second guide tube, reducing the error rate of multiple processes and multiple workstations, and also reducing many intermediate links and process equipment, thereby reducing costs; and by replacing the solid column, alloy tubes of different wall thicknesses can be produced, thereby improving the production efficiency of alloy tubes.

[0027] 2. The present invention provides a conical structure formed by a plurality of spirally arranged pipes at the bottom of the first guide pipe, which increases the flow rate of the molten raw materials and improves the preparation rate on the one hand, and ensures better mixing of the molten raw materials and ensures product quality on the other hand.

[0028] 3. The pipe making equipment of the present invention is more flexible and can change the production specifications in a short time without excessive requirements on the production batch. Moreover, the present invention has no requirements on the raw materials and can use small corners or standard materials, thus reducing the waste of resources.

[0029] Fourth, the pipe making equipment of the present invention can flexibly and accurately control the ratio of alloy components. Not only can the components be precisely controlled, but the alloy ratio can also be made more uniform, thereby making the quality of the alloy pipe more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings are merely provided for illustrative purposes only and are not intended to limit the scope of the present invention.

[0031] Figure 1 : Schematic diagram of the internal structure of the present invention;

[0032] Figure 2 : Schematic diagram of the external structure of the present invention;

[0033] Figure 3 : Schematic diagram of cone structure connection;

[0034] In the figure: 1 crucible, 1.1 molten raw material, 2 tube former, 2.1 finished alloy tube, 3 high-frequency induction heating copper tube, 4 insulation layer, 5 cooling water tube, 6 solid column, 7 first guide tube, 8 tapered structure, 9 second guide tube. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution, design method and advantages of the present invention more clear, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] like Figure 1-3 As shown, the present invention provides a high-temperature alloy tube melter, comprising a crucible 1 and a tube former 2 fixedly connected to the crucible 1; the crucible 1 is open at the top and connected to the tube former 2 at the bottom; a heating system is circumferentially arranged on the outer side of the crucible 1, and the heating system is fixedly connected to the crucible 1; the tube former 2 is a hollow structure with openings at both ends, and a first guide tube 7 is arranged inside the hollow structure, and the first guide tube 7 is coaxially arranged with the hollow structure; a second guide tube 9 is fixedly arranged at the bottom of the first guide tube 7, and the first guide tube 7 and the second guide tube 9 are connected; a solid column 6 is arranged inside the first guide tube 7, and the solid column 6 is integrally formed with the first guide tube 7, and the bottom end of the solid column 6 extends to the inside of the second guide tube 9.

[0037] The crucible system is a storage tank that holds and smelts raw materials and serves as a chamber for determining the proportion of alloy components. Made of tungsten, the crucible can melt metals and alloys at temperatures below 2500°C. This smelting process volatilizes harmful impurities, improving raw material quality.

[0038] In the above, the heating system is a high-frequency induction heating copper tube 3; the high-frequency induction heating copper tube 3 is arranged around the crucible 1 in a circumferential direction; and cooling water is provided inside the high-frequency induction heating copper tube 3. The raw material is heated by the induction heating crucible to obtain liquid molten raw material 1.1.

[0039] In the above description, an insulation layer 4 is provided between the crucible 1 and the high-frequency induction heating copper tube 3, and is fixedly connected to the crucible 1 and the high-frequency induction heating copper tube 3, respectively. Specifically, the insulation layer 4 comprises a zirconia brick layer and a zirconia fiber wool layer. The zirconia brick layer is located on the side closest to the crucible 1, and the zirconia fiber wool layer is located on the side closest to the high-frequency induction heating copper tube 3. The insulation system is designed to prevent the high temperature from escaping and to prevent the copper induction coil from burning.

[0040] To ensure smoother flow and better mixing of the molten raw materials 1.1, please continue to refer to Figure 3A conical structure 8 is provided between the first guide tube 7 and the second guide tube 9. The top of the conical structure 8 is fixedly connected to the first guide tube 7, and the bottom is fixedly connected to the second guide tube 9; wherein the solid column 6 is integrally formed with the inner wall of the conical structure 8. The conical structure 8 is formed by weaving a plurality of spirally arranged pipes. The top of the pipe is connected to the inner wall of the first guide tube 7, and the bottom is connected to the inner wall of the second guide tube 9. The material of the pipe former is usually made of tungsten or molybdenum. The above-mentioned conical structure can use the gravity flow effect to form a regular pipe, and can also re-mix the downstream material to make its structure more uniform, the quality of the pipe will be better, and the pipe structure can form a spiral structure. Such a spiral structure makes the pipe strength better.

[0041] In order to ensure that the heated raw materials continuously descend, a high-frequency induction heating copper tube 3 is circumferentially wound around the outer wall of the tube former 2 . The high-frequency induction heating copper tube 3 is coaxially arranged and fixedly connected to the tube former 2 .

[0042] Precise cooling is essential to accurately control the temperature of the pipe, ensuring it solidifies at the appropriate location and flows smoothly out as qualified pipe. The key to achieving precise temperature control is to control the flow rate to accurately control the air temperature. In this embodiment, a cooling water pipe 5 is fixedly mounted on the outer wall of the pipe former 2 near the bottom. The outlet of the cooling water pipe 5 is located within the hollow structure and does not contact the outer wall of the second guide tube 9, ensuring that the cooling water flows directly onto the outer wall of the second guide tube 9.

[0043] In the above, a cover plate is provided on the top of the crucible 1 , and the cover plate is movably connected to the crucible 1 .

[0044] When the present invention is used, the raw materials are placed into the crucible from the top of the crucible. Since the raw materials need to be melted, there are no requirements for the raw materials themselves, and scraps can be used to save resources, and the raw material ratio of the alloy tube can be adjusted according to the purpose. The temperature of the copper tube is raised by high-frequency induction heating. When the raw materials are in a liquid state, the molten raw materials flow from the bottom center of the crucible into the first guide tube of the tube former by gravity. Since a solid column is provided inside the first guide tube, the molten raw materials flow along the tube wall of the first guide tube into the conical structure of the pipe, and finally flow into the second guide tube. Since the bottom end of the solid column has extended to the second guide tube, the molten raw materials form a colloidal (solid-liquid coexistence of the molten raw materials) tube in the gap between the second guide tube and the solid column. The tubular raw materials are cooled and shaped by a cooling water pipe to obtain a finished alloy tube 2.1.

[0045] While various embodiments of the present invention have been described above, the above descriptions are intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. High temperature alloy tube melting and casting device, characterized in that: It comprises a crucible (1) and a tube former (2) fixedly connected to the crucible (1); The crucible (1) has an open top and a bottom that is connected to the tube former (2); A heating system is provided on the outer circumference of the crucible (1), and the heating system is fixedly connected to the crucible (1); The tube former (2) is a hollow structure with two ends open, a first guide tube (7) is provided inside the hollow structure, and the first guide tube (7) is fixedly arranged coaxially with the hollow structure; A second guide tube (9) is fixedly provided at the bottom of the first guide tube (7), and the first guide tube (7) and the second guide tube (9) are in communication; a solid column (6) is provided inside the first guide tube (7), and the solid column (6) and the first guide tube (7) are integrally formed, and the bottom end of the solid column (6) extends into the interior of the second guide tube (9); A tapered structure (8) is provided between the first guide tube (7) and the second guide tube (9), and is fixedly connected to the first guide tube (7); a small-diameter end of the tapered structure (8) is fixedly connected to the second guide tube (9); The solid column (6) and the inner wall of the conical structure (8) are integrally formed; The conical structure (8) is formed by weaving a plurality of pipes spirally, wherein the top of the pipe is connected to the inner wall of the first guide pipe (7), and the bottom of the pipe is connected to the inner wall of the second guide pipe (9).

2. The high temperature alloy tube melter according to claim 1, characterized in that: The heating system is a high-frequency induction heating copper tube (3); The high-frequency induction heating copper tube (3) is wound around the crucible (1); Cooling water is provided inside the high-frequency induction heating copper tube (3).

3. The high temperature alloy tube melter according to claim 2, characterized in that: A heat-insulating layer (4) is provided between the crucible (1) and the high-frequency induction heating copper tube (3), and the heat-insulating layer (4) is fixedly connected to the crucible (1) and the high-frequency induction heating copper tube (3), respectively.

4. The high temperature alloy tube melter according to claim 3, characterized in that: A high-frequency induction heating copper tube (3) is circumferentially wound around the outer wall of the tube former (2), and the high-frequency induction heating copper tube (3) is coaxially arranged and fixedly connected to the tube former (2).

5. The high temperature alloy tube melter according to claim 1, characterized in that: A cooling water pipe (5) is fixedly provided on the outer wall of the tube former (2) near the bottom end, and the water outlet of the cooling water pipe (5) is located inside the hollow structure and does not contact the outer wall of the second guide tube (9).

6. The high temperature alloy tube melter according to claim 1, characterized in that: A cover plate is provided on the top of the crucible (1), and the cover plate is movably connected to the crucible (1).

7. The high temperature alloy tube melter according to claim 3, characterized in that: The thermal insulation layer (4) comprises a zirconia brick layer and a zirconia fiber cotton layer, wherein the zirconia brick layer is located on a side close to the crucible (1), and the zirconia fiber cotton layer is located on a side close to the high-frequency induction heating copper tube (3).

8. The high temperature alloy tube melter according to claim 1, characterized in that: The crucible (1) and the tube former (2) are both made of tungsten or molybdenum.

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