Magnetic induction heating structure of vacuum degassing furnace

Abstract

The utility model relates to a magnetic induction heating structure of a vacuum degassing furnace. The magnetic induction heating structure is composed of a coil assembly and a magnetic steel assembly arranged on the outer side of a coil. A first induction coil and a second induction coil of the coil assembly generate a magnetic field after being electrified so as to heat and melt metal in a crucible in the coil assembly. The first cooling pipeline and the second cooling pipeline on the upper portion and the lower portion reduce the temperature of the upper end and the lower end. Cooling liquid connectors are formed in the copper pipes of the first induction coil and the second induction coil, cooling liquid is introduced into the copper pipes, heat of the copper pipes can be taken away by the cooling liquid, and the service life of the first induction coil and the service life of the second induction coil are prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metallurgical equipment, and particularly relates to a magnetic induction heating structure of a vacuum degassing furnace. BACKGROUND

[0002] With the innovation of technology and the development of economy, the performance requirements of steel are continuously improved in various industries, and the demand for refined steel is increasing, so secondary refining of various steel types after melting under vacuum has become a key production process. The induction melting vacuum degassing furnace can inductively melt solid metal in an atmospheric environment, and can degas and refine the molten metal in a vacuum state. The molten metal is cast under the atmosphere or under the protection of inert gas. After refining, the content of oxygen, hydrogen, sulfur, nitrogen and various non-metallic inclusions such as oxides and sulfides in the steel can be reduced, and the mechanical properties of the steel can be improved.

[0003] For example, Chinese invention patent CN 118563045 A discloses an induction melting vacuum degassing furnace, wherein the furnace body includes a crucible and an induction coil. When the induction coil is energized, it emits a magnetic induction line, which causes the metal located in the middle of the induction coil to heat and melt. However, the induction coil itself also generates heat. Therefore, in order to improve the service life, the induction coil must also be cooled. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is to solve the deficiencies in the prior art and provide a magnetic induction heating structure of a vacuum degassing furnace with a long service life.

[0005] The utility model solves the technical problem by adopting the following technical scheme:

[0006] A magnetic induction heating structure of a vacuum degassing furnace comprises a columnar coil assembly and a magnetic steel assembly arranged outside the coil, and the magnetic steel assembly forms a magnetic yoke.

[0007] The coil assembly comprises, from top to bottom, a first cooling pipeline, a first induction coil, a second induction coil and a second cooling pipeline. The first cooling pipeline and the second cooling pipeline are used for passing cooling liquid.

[0008] The first induction coil and the second induction coil are both spiral and comprise a copper pipe and a cable in the copper pipe. Cooling liquid interfaces are formed in the copper pipe to pass cooling liquid in the copper pipe.

[0009] Preferably, the magnetic induction heating structure of the vacuum degassing furnace comprises a first cooling pipeline interface and a second cooling pipeline interface.

[0010] Preferably, the vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil are connected through the connecting pipeline, and the connecting pipeline is provided with a cable inlet.

[0011] Preferably, the vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil are connected through the connecting pipeline, and the connecting pipeline is provided with a cable inlet.

[0012] Preferably, the vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil are connected through the connecting pipeline, and the connecting pipeline is provided with a cable inlet.

[0013] Preferably, the vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil are connected through the connecting pipeline, and the connecting pipeline is provided with a cable inlet.

[0014] Preferably, the vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil are connected through the connecting pipeline, and the connecting pipeline is provided with a cable inlet.

[0015] Preferably, the vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil are connected through the connecting pipeline, and the connecting pipeline is provided with a cable inlet.

[0016] Preferably, the vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil are connected through the connecting pipeline, and the connecting pipeline is provided with a cable inlet.

[0017] The beneficial effects of the utility model are as follows:

[0018] The vacuum degassing furnace magnetic induction heating structure of the utility model, the first induction coil and the second induction coil generate a magnetic field after being electrified to heat and melt the metal in the crucible in the coil assembly. The first cooling pipeline and the second cooling pipeline on the upper side and the lower side reduce the temperature of the upper end and the lower end. The cooling liquid interface is arranged on the copper pipe of the first induction coil and the second induction coil, and the cooling liquid is passed into the copper pipe, so that the heat of the copper pipe itself is taken away by the cooling liquid, and the service life of the first induction coil and the second induction coil is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The technical scheme of the utility model will be further described below in combination with the drawings and examples.

[0020] Figure 1 It is the structure schematic view of the vacuum degassing furnace magnetic induction heating structure of the utility model example;

[0021] Figure 2 and Figure 3 is a structural schematic diagram of a coil assembly of an embodiment of the present application;

[0022] Figure 4 is a structural schematic diagram of a magnetic steel assembly of an embodiment of the present application;

[0023] Figure 5 is a structural schematic diagram of a water cooling assembly in a magnetic steel assembly of an embodiment of the present application.

[0024] The reference signs in the drawings are:

[0025] 1 first cooling pipe;

[0026] 2 first induction coil;

[0027] 3 second induction coil;

[0028] 4 second cooling pipe;

[0029] 5 magnetic steel assembly;

[0030] 7 upper coil ring;

[0031] 8 lower coil ring;

[0032] 11 first cooling pipe interface;

[0033] 21 first induction coil cooling water interface;

[0034] 28 connecting pipe;

[0035] 29 cable inlet;

[0036] 31 second induction coil cooling water interface;

[0037] 41 second cooling pipe interface

[0038] 51 side plate;

[0039] 52 water cooling assembly;

[0040] 53 silicon steel sheet assembly;

[0041] 54 bolt;

[0042] 71 upper coil ring cooling liquid interface;

[0043] 81 lower coil ring cooling liquid interface;

[0044] 521 water cooling pipe;

[0045] 522 water inlet interface;

[0046] 523 water outlet interface. DETAILED DESCRIPTION

[0047] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The technical solutions of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0051] Embodiments

[0052] The present embodiment provides a vacuum degassing furnace magnetic induction heating structure, which is arranged outside the crucible, as shown in the figure, comprising: a columnar coil assembly and a magnetic steel assembly 5 arranged outside the coil, the magnetic steel assembly 5 is a profiled magnetic yoke, and the magnetic yoke shielding can reduce magnetic leakage; Figures 1-3

[0053] The coil assembly is sequentially provided with a first cooling pipeline 1, a first induction coil 2, a second induction coil 3 and a second cooling pipeline 4 from top to bottom, and the first cooling pipeline 1 and the second cooling pipeline 4 are used for passing cooling liquid;

[0054] The first induction coil 2 and the second induction coil 3 are both spiral and comprise a copper pipe and a cable in the copper pipe, and a cooling liquid interface is formed on the copper pipe to pass cooling liquid in the copper pipe.​

[0055] The magnetic induction heating structure of the vacuum degassing furnace of the embodiment, the first induction coil 2 and the second induction coil 3 generate a magnetic field after being electrified to heat the metal in the crucible in the coil assembly. The first cooling pipe 1 and the second cooling pipe 4 at the upper and lower ends reduce the temperature at the upper and lower ends. The cooling liquid interface is provided on the copper pipe of the first induction coil 2 and the second induction coil 3, and the cooling liquid is introduced into the copper pipe, so that the heat of the copper pipe itself is taken away by the cooling liquid, thereby prolonging the service life of the first induction coil 2 and the second induction coil 3.

[0056] As shown in Figure 2 , the cooling liquid interface is that the first cooling pipe 1 has a first cooling pipe interface 11, and the second cooling pipe 4 has a second cooling pipe interface 41.

[0057] The first induction coil 2 and the second induction coil 3 are connected through the connecting pipe 28, and the connecting pipe 28 has a cable inlet 29. The cable can be inserted into the copper pipe by the cable inlet 29 by the operator.

[0058] Further, the upper coil ring 7 is provided at the upper end of the first cooling pipe 1, and the lower coil ring 8 is provided at the lower end of the second cooling pipe 4. The upper coil ring 7 and the lower coil ring 8 are both a coil, and the upper coil ring 7 and the lower coil ring 8 form a Faraday ring to form a magnetic short circuit and fully absorb the leakage magnetic flux at the upper and lower ends. The upper coil ring 7 and the lower coil ring 8 respectively have an upper coil ring cooling liquid interface 71 and a lower coil ring cooling liquid interface 81, and the cooling liquid can also be introduced.

[0059] The magnetic steel assembly 5 abuts against the first induction coil 2 and the second induction coil 3, and the magnetic steel assembly 5 and the first induction coil 2 and the second induction coil 3 are insulated (coated with insulating paint or separated by an insulating plate) to prevent direct contact.

[0060] Further, the magnetic steel assembly 5 includes two side plates 51, two water cooling assemblies 52 are respectively arranged on the inner sides of the two side plates 51, and a silicon steel sheet assembly 53 is located between the two water cooling assemblies 52.

[0061] Further, the water cooling assembly 52 includes a ring-shaped hollow water cooling pipe 521, the first section and the last end of the water cooling pipe 521 are blind ends and are connected together, and the first section and the last end have a water inlet interface 522 and a water outlet interface 523.

[0062] Further, a plurality of bolts 54 pass through the side plates 51, the hollow portions of the water cooling assemblies 52, and the silicon steel sheet assembly 53 to fix the silicon steel sheet assembly 53.

[0063] Further, the silicon steel sheet assembly 53 is formed by laminating arc-shaped silicon steel sheets.

[0064] AsFigure 3 As shown, the first induction coil 2 has a first induction coil cooling water interface 21, and the second induction coil 3 has a second induction coil cooling water interface 31, through which cooling water is introduced into the copper pipes of the first induction coil 2 and the second induction coil 3.

[0065] A fixing plate 6 (made of epoxy resin material) is arranged around the first induction coil 2 and the second induction coil 3, and is used to fix the first induction coil 2 and the second induction coil 3.

[0066] The induction coil is made of an extruded rectangular copper pipe with a purity of 99.97% electrolytic red copper with a T2 brand and a wall thickness of 7mm, which is wound on a special mold. It not only ensures the rigidity of the coil but also has the largest conductive cross section. The outer layer of the induction coil is a high-temperature-resistant and high-voltage-resistant insulating paint, which is integrally immersed and dried in a vacuum, and the insulation level reaches H level. The cable can use the existing induction coil cable on the market.

[0067] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A magnetic induction heating structure for a vacuum degassing furnace, characterized in that, It comprises: a columnar coil assembly and a magnetic steel assembly (5) arranged outside the coil, the magnetic steel assembly (5) forming a magnetic yoke; the coil assembly sequentially comprises a first cooling pipe (1), a first induction coil (2), a second induction coil (3) and a second cooling pipe (4) from top to bottom, the first cooling pipe (1) and the second cooling pipe (4) being used for passing cooling liquid; the first induction coil (2) and the second induction coil (3) are both spiral and comprise a copper pipe and a cable in the copper pipe, the copper pipe being provided with a cooling liquid interface for passing cooling liquid in the copper pipe.

2. The magnetic induction heating structure for vacuum degassing furnaces according to claim 1, characterized in that, The first cooling pipe (1) is provided with a first cooling pipe interface (11), and the second cooling pipe (4) is provided with a second cooling pipe interface (41).

3. The magnetic induction heating structure of the vacuum degassing furnace according to claim 1, characterized in that, The first induction coil (2) and the second induction coil (3) are connected by a connecting pipe (28), and the connecting pipe (28) is provided with a cable inlet (29).

4. The magnetic induction heating structure for vacuum degassing furnaces according to claim 1, characterized in that, The first cooling pipe (1) is provided with an upper coil ring (7), and the second cooling pipe (4) is provided with a lower coil ring (8).

5. The magnetic induction heating structure for vacuum degassing furnaces according to claim 4, characterized in that, The upper coil ring (7) and the lower coil ring (8) are both a coil ring, and the upper coil ring (7) and the lower coil ring (8) are respectively provided with an upper coil ring cooling liquid interface (71) and a lower coil ring cooling liquid interface (81).

6. The magnetic induction heating structure for vacuum degassing furnaces according to claim 1, characterized in that, The magnetic steel assembly (5) abuts against the first induction coil (2) and the second induction coil (3), and the magnetic steel assembly (5) and the first induction coil (2) and the second induction coil (3) are insulated.

7. The magnetic induction heating structure for vacuum degassing furnaces according to claim 6, characterized in that, The magnetic steel assembly (5) comprises two side plates (51), two water cooling assemblies (52) arranged on the inner sides of the two side plates (51), and a silicon steel sheet assembly (53) located between the two water cooling assemblies (52).

8. The magnetic induction heating structure for vacuum degassing furnaces according to claim 7, characterized in that, The water cooling assembly (52) comprises a ring-shaped hollow water cooling pipe (521), the first section and the end of the water cooling pipe (521) being both blind ends and being connected together, and the first section and the end being provided with a water inlet interface (522) and a water outlet interface (523).

9. The magnetic induction heating structure for vacuum degassing furnaces according to claim 8, characterized in that, A plurality of bolts (54) pass through the side plates (51), the hollow portions of the water cooling assemblies (52) and the silicon steel sheet assembly (53) to fix the silicon steel sheet assembly (53).

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