Low-voltage large-current metal annealing furnace

Abstract

A low-voltage large-current metal annealing furnace comprises a shell, a heat preservation and insulation material, an inner container and at least two sets of electric heating components, the electric heating components are arranged in the shell, the heat preservation and insulation material or the inner container, the shell is cylindrical, the inner container is surrounded by the at least two sets of electric heating components, and the electric heating components are arranged in the shell, the heat preservation and insulation material or the inner container. The electric heating assemblies are overlapped layer by layer and are connected through the supporting pieces; the electric heating assembly is a parallel circuit and is formed by connecting a plurality of current shunting pieces end to end, the two ends of the electric heating assembly are connected through connecting pieces to form a closed loop, the connecting pieces are made of insulating materials, and each current shunting piece comprises an inlet end, a current shunting section and an outlet end. Compared with the prior art, the heating method is more energy-saving, higher in heat efficiency and shorter in heating time. In addition, the ductility of the heated metal is higher than that of the prior art.

Description

Technical Field

[0001] The invention relates to metal annealing, in particular to a low-voltage and high-current metal annealing furnace. Background Art

[0002] The metal annealing furnace in the prior art generally uses a high voltage, low current heating method, which generates heat through the high resistance of the resistance band and transfers the heat to the metal to be annealed through thermal radiation, thereby achieving metal annealing. The disadvantages of this annealing method are that the thermal efficiency is too low, the energy consumption is large, the heating speed is slow, and the elongation of the metal obtained after annealing is not satisfactory. Summary of the invention

[0003] The object of the present invention is to provide a low-voltage, high-current metal annealing furnace, which increases the current change rate of the high-current circuit by designing a low-voltage, high-current circuit distribution and control system. In addition to providing heat transfer with higher thermal efficiency to the metal to be annealed through thermal radiation, it can also superimpose the magnetic field formed by the large current and the change rate of the magnetic flux to form eddy current heat for the metal to be annealed in the annealing furnace, so that the metal material to be annealed is thermally annealed by superimposing radiation heat and eddy current heat, thereby achieving fast annealing temperature rise, shortening the annealing time, improving the annealing elongation, and greatly saving the power consumption of annealing.

[0004] The present application provides a low-voltage, high-current metal annealing furnace, which comprises: an outer shell, thermal insulation materials, an electric heating component, and an inner liner, wherein: the electric heating component is arranged between or inside the outer shell, the thermal insulation material, and the inner liner, the outer shell is cylindrical, the electric heating component is at least two groups and surrounds the inner liner, the electric heating components are stacked layer by layer, and are connected in the middle by a support member; the electric heating component is a parallel circuit, and is composed of a plurality of current shunt components connected end to end, and the two ends are connected by a connector to form a closed loop, the connector is made of insulating material, and the current shunt component includes an inlet end, a current shunt section, and an outlet end.

[0005] In a preferred example, the housing is provided with an opening for wiring.

[0006] In a preferred example, the material of the support segment includes: a metal material that has been subjected to insulation treatment.

[0007] In a preferred example, the annealing furnace is also equipped with a transformer.

[0008] In a preferred embodiment, the inner tank does not need to be attached to the electric heating component and is formed by a high temperature resistant component.

[0009] In a preferred example, the single current diverter comprises a plurality of current diverter segments.

[0010] In a preferred example, the inlet end and the outlet end of a single current splitter are thicker than the splitter section.

[0011] In a preferred embodiment, the electric heating component is connected to the housing by insulating bolts.

[0012] In a preferred example, the outer shell further includes a thermal insulation top cover, and the top cover is connected to the outer shell by bolts.

[0013] In a preferred embodiment, the volume of the shell is 1-100 cubic meters and is fixed to the ground by bolts.

[0014] The main advantages of the present invention are:

[0015] (1) It increases the current change rate of the high current circuit by designing a low voltage and high current circuit distribution and control system. In addition to providing heat transfer to the metal to be annealed through thermal radiation with higher thermal efficiency, it can also superimpose the magnetic field formed by the high current and the change rate of the magnetic flux to form eddy current heat in the metal to be annealed in the annealing furnace, so that the metal material to be annealed is thermally annealed by superposition of radiation heat and eddy current heat, thereby improving thermal efficiency.

[0016] (2) Compared with ordinary high-voltage and low-current equipment, the low-voltage and high-current heating equipment of the present invention has a faster annealing temperature rise, shortens the annealing time, improves the annealing elongation, and greatly saves annealing power consumption.

[0017] A large number of technical features are recorded in the specification of this application, which are distributed in various technical solutions. If all possible combinations of technical features of this application (i.e., technical solutions) are to be listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of this application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all deemed to have been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be deemed to have been recorded because it is technically infeasible, and the solution of A+B+C+E should be deemed to have been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of a metal annealing furnace according to an embodiment of the present invention;

[0019] Figure 2is a top view of a metal annealing furnace according to an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of an electric heating component according to an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the structure of a current shunt element of an electric heating component according to an embodiment of the present invention.

[0022] Reference numerals:

[0023] 1- Shell; 2- Inner tank; 3- Electric heating component; 4- Current shunt component; 5- Cable management port DETAILED DESCRIPTION

[0024] After careful and in-depth research, the inventor has developed a low-voltage, high-current metal annealing furnace for the first time. By designing the circuit distribution of low-voltage, high-current and increasing the current change rate of the high-current circuit, in addition to providing more efficient heat transfer to the metal to be annealed through thermal radiation, it can also superimpose the magnetic field formed by the large current and the change rate of the magnetic flux to form eddy current heat in the metal to be annealed in the annealing furnace, so that the metal material to be annealed is thermally annealed by superposition of radiation heat and eddy current heat, thereby achieving fast annealing temperature rise, shortening the annealing time, improving the annealing elongation, and greatly saving the annealing power consumption.

[0025] Example

[0026] One embodiment of the present invention is Figure 1-Figure 4 As shown, it includes an outer shell 1, an inner liner 2, an electric heating component 3 and thermal insulation materials, wherein: the electric heating component 3 is arranged between the outer shell 1 and the inner liner 2, the outer shell 1 is cylindrical, the electric heating component 3 is not less than two groups and surrounds the inner liner 2, the electric heating components 3 are stacked layer by layer, and connected in the middle by a support member; the electric heating component 3 is a parallel circuit, and is composed of a plurality of current shunt components 4 connected end to end, and the two ends are connected by a connector to form a closed loop, the connector is made of insulating material, the current shunt component 4 includes an inlet end, a current shunt section and an outlet end. Optionally, in one embodiment, the number of current shunt sections in a single current shunt component 4 is not less than two. The low-voltage and high-current equipment in this embodiment realizes the conversion from high voltage to low voltage by configuring a transformer, and the inlet end and the outlet end are thicker than the shunt section. The thermal insulation material is configured inside or outside the inner liner.

[0027] Optionally, in one embodiment, the housing 1 is provided with a wire management port 5 for wiring and wire management. Optionally, in another embodiment, the inner tank 2 does not need to be attached to the electric heating component, and is formed by a high temperature resistant component.

[0028] In one embodiment, the housing 1 further includes a top cover, and the top cover is connected to the housing 1 by bolts. The housing is also fixed to the ground by bolts.

[0029] The low voltage and high current metal annealing furnace of this embodiment designs the circuit distribution of low voltage and high current and increases the current change rate of the high current circuit during heating. In addition to providing heat transfer with higher thermal efficiency to the metal to be annealed through thermal radiation, it can also superimpose the magnetic field formed by the high current and the change rate of the magnetic flux to form eddy current heat in the metal to be annealed in the annealing furnace, so that the metal material to be annealed is thermally annealed by superimposing radiation heat and eddy current heat, thereby achieving fast annealing temperature rise, shortening the annealing time, improving the annealing elongation, and greatly saving the power consumption of annealing.

[0030]

[0031]

[0032] Table 1

[0033] The specific energy-saving effect of one embodiment of the present invention is shown in Table 1. By comparing the data of the low-voltage and high-current annealing furnace of the present invention with the annealing furnace of the prior art, it can be clearly found that the average power saving efficiency of the annealing furnace of the present invention can be increased to 35%, the metal annealing rate is increased by 36%, and the average power saving per furnace can reach 66.63kw.

[0034] Moreover, the elongation of the metal obtained by using the annealing furnace of the present invention can reach 28, which is an amazing 40% improvement compared to the 20% ductility in the prior art, greatly improving the annealing capability.

[0035]

[0036] Table 2

[0037]

[0038] Table 3

[0039] Tables 2 and 3 show the power consumption of the annealing furnace after a fixed time after and before the annealing furnace described in the present invention is implemented. The table clearly reflects the power consumed after and before the annealing furnace of the present invention is used in the complete annealing process and the heating speed of the present invention. It can be clearly stated that the power saving reaches about 30%, and in the process of rising from 200 degrees to 400 degrees, it takes three and a half hours before using the device described in the present invention, and only about two and a half hours after use, and the heating speed is also greatly improved.

[0040] It should be noted that in the invention document of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the element. In the invention document of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements. Expressions such as multiple, multiple, and multiple include 2, 2 times, 2 kinds, and more than 2, more than 2 times, and more than 2 kinds.

[0041] All documents mentioned in the present invention are considered to be included in the disclosure of the present invention as a whole, so that they can be used as the basis for modification when necessary. In addition, it should be understood that the above are only preferred embodiments of this specification and are not used to limit the scope of protection of this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of one or more embodiments of this specification.

Claims

1. A low voltage and high current metal annealing furnace, characterized in that: The annealing furnace includes: an outer shell, thermal insulation materials, an inner liner, and an electric heating component, wherein: the electric heating component is arranged inside the outer shell, the thermal insulation material or the inner liner, the outer shell is cylindrical, the electric heating components are at least two groups and surround the inner liner, the electric heating components are stacked layer by layer, and are connected in the middle by a support member; the electric heating component is a parallel circuit, and is composed of a plurality of current shunt components connected end to end, and the two ends are connected by a connector to form a closed loop, the connector is made of insulating material, and the current shunt component includes an inlet end, a current shunt section and an outlet end.

2. The annealing furnace according to claim 1, characterized in that: The housing is provided with an opening for wiring.

3. The annealing furnace according to claim 1, characterized in that: The materials of the support section include: hard insulating material and metal material that has been subjected to insulation treatment.

4. The annealing furnace according to claim 3, characterized in that: The annealing furnace is also equipped with a transformer.

5. The annealing furnace according to claim 1, characterized in that: The inner container does not need to be attached to the electric heating component and is formed by a high temperature resistant component.

6. The annealing furnace according to claim 1, characterized in that: A single current diverter comprises a plurality of current diverter sections.

7. The annealing furnace according to claim 1, characterized in that: The inlet end and the outlet end of a single current shunt element are thicker than the shunt section.

8. The annealing furnace according to claim 1, characterized in that: The electric heating component is connected to the outer shell or the inner tank through hard insulating bolts or bolts treated with insulation.

9. The annealing furnace according to claim 1, characterized in that: The shell also includes a thermal insulation top cover, and the thermal insulation top cover is connected to the shell by bolts.

10. The annealing furnace according to claim 1, characterized in that: The shell has a volume of 1 cubic meter to 100 cubic meters and is fixed to the ground by bolts.

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