Inducing smelting furnace with composite shell
A technology for induction melting furnaces and shells, which is applied in the direction of furnaces, crucible furnaces, furnace types, etc., which can solve the problems of induction coil fusion, difficulty in inspection and maintenance, and malignant furnace penetration, etc., to achieve reliable insulation distance, easy maintenance, The effect of ensuring safe operation
Inactive Publication Date: 2005-07-13
杭州四达电炉成套设备有限公司 +1
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Problems solved by technology
The induction melting furnace currently used has a shell welded with ordinary carbon steel, and an induction coil is installed inside the shell. Considering that carbon steel is easy to generate heat in magnetic flux leakage, the induction coil is surrounded by a silicon steel sheet. There is an insulating layer between the magnetic conductor and the induction coil. In order to prevent the relative displacement of the two, the insulating layer is very thin, generally only a few millimeters thick. The induction melting furnace with this structure has good mechanical strength. However, because the induction coil is surrounded by a magnetic conductor, the insulating layer between them is very thin, even a small amount of magnetic flux leakage will cause insulation damage, inspection and maintenance are also difficult, and even lead to malignant furnace wear, resulting in the induction coil and magnetic conductor being melted by molten steel scrapped as one
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[0009] refer to figure 1 , the composite shell induction melting furnace invented has a stainless steel outer shell 1-1 and an aluminum inner shell 1-2 fixed in one, the steel outer shell and the aluminum inner shell are both composed of left and right halves, and through The bolts 3 are fastened by adding insulating pads 4 at the two ends of the bolts and the joints of the aluminum inner shell and the steel outer shell, respectively, so as to avoid the formation of circulating currents. Usually, in order to save material and further reduce leakage flux loss, it can be placed at the bottom of the stainless steel shell along the circumferential direction (see figure 2 ) are evenly distributed and welded with several ""-shaped brackets 5 extending toward the center for supporting and fixing the inner shell, so that the bottom of the aluminum inner shell is ring-shaped. On the inner surface of the bottom of the aluminum inner shell, there is an unconnected annular magnetic shi...
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The shell of the composite shell induction melting furnace of the present invention has two layers of a steel outer shell and an aluminum inner shell that are fixed in one body. Insulation pads are added to the joints of the end and the inner and outer shells to fasten them. The inner surface of the bottom of the inner shell has a magnetic shielding plate composed of two halves that are not connected. The induction coil placed in the shell and the inner shell are formed. Inside the cavity, there are a number of radially arranged support rods from top to bottom, one end of which is an insulating block, which is fastened to the bakelite columns distributed axially around the induction coil, and the other end is a steel part, which is connected to the inner shell fasten. Since the present invention adopts the aluminum inner shell and covers the magnetic shielding plate at the bottom of the aluminum inner shell, it can shield the magnetic flux leakage around the induction coil and effectively reduce the temperature rise of the furnace. Because there is a space between the aluminum inner shell and the induction coil, it not only ensures reliable insulation The distance ensures safe operation and provides sufficient maintenance space for easy maintenance.
Description
technical field [0001] This invention relates to induction melting furnaces. Background technique [0002] Induction melting furnaces have been widely used in metal melting and foundry industries. It uses alternating current in the coil to generate an alternating magnetic field in the coil, so that the metal material placed in the coil generates eddy current due to electromagnetic induction and heats up to be melted. The induction melting furnace currently used has a shell welded with ordinary carbon steel, and an induction coil is installed inside the shell. Considering that carbon steel is easy to generate heat in magnetic flux leakage, the induction coil is surrounded by a silicon steel sheet. There is an insulating layer between the magnetic conductor and the induction coil. In order to prevent the relative displacement of the two, the insulating layer is very thin, generally only a few millimeters thick. The induction melting furnace with this...
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IPC IPC(8): F27B14/06
Inventor 徐晓亮俞蒋明
Owner 杭州四达电炉成套设备有限公司