CN202818666U - Cooling-free induction coil - Google Patents

Abstract

The utility model relates to a cooling-free induction coil used by a heating smelting furnace, and is characterized in that: a furnace housing is fixed on insulating bricks, a hearth is fixed on the insulating bricks inside the furnace housing, an outer wall of the hearth is provided with a spiral induction coil installation groove, an induction coil is arranged in the induction coil installation groove, and the induction coil is formed by winding a single-stranded solid metal line or alloy wire. According to the cooling-free induction coil of the utility model, heat insulation is not needed between the induction coil and a heated body, thus the furnace has a simple structure; in addition, the induction coil needs not to be cooled, thus convenient processing and maintenance can be achieved.

Description

Has an induction coil that does not require cooling

technical field

The utility model relates to a coil structure, in particular to an induction coil which does not need to be cooled and is used in a heating melting furnace.

Background technique

According to the principle of induction heating, all induction heating melting furnaces (intermediate frequency melting furnaces, super-audio frequency melting furnaces, electromagnetic heating melting furnaces) require an induction coil. In order to improve the efficiency of induction heating, generally the distance between the induction coil and the heated body is relatively short. In this way, when the temperature of the heated body is very high, its heat is also easily transferred to the induction coil. Generally, the material of the induction coil is a conductor that requires good electrical conductivity, such as copper and copper. When the induction current with a large current is passed through the induction coil, a lot of heat will be generated, and the temperature of the induction coil will rise. In order not to melt the induction coil at high temperature, the induction coil of the intermediate frequency furnace generally uses copper tubes. Cooling water is passed inside the copper pipe, and some super-audio melting furnaces use high-temperature wires (copper core wires, or copper core enameled wires) to place heat-insulating cotton between the high-temperature cables and the heated body, and the high-temperature wires are cooled by fans.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art and provide an induction coil with high efficiency, energy saving and long service life that does not need cooling.

According to the technical solution provided by the utility model, the induction coil that does not need to be cooled is provided with a spiral induction coil installation groove on the outer wall or inner wall of the furnace, and an induction coil is installed in the induction coil installation groove. The induction coil is formed by winding a single-strand solid metal wire or a single-strand solid alloy wire.

The number of turns of the induction coil is 10-40 turns, the pitch of the induction coil is 3-30mm, and the diameter of the single-strand solid metal wire or single-strand solid alloy wire forming the induction coil is 1-20mm.

The utility model has the following advantages:

There is no need for heat insulation between the induction coil and the heated body, and the furnace has a simple structure;

The induction coil does not need to be cooled, and the processing and maintenance are convenient;

The induction coil does not need to be cooled, and the heat on the induction coil can be fully utilized, saving a lot of energy;

The induction coil is made of alloy solid high-temperature-resistant metal wire or alloy wire, which has a high melting point and does not need to be cooled. Don't worry about the problem that the induction coil will be easily burned if the cooling water is cut off.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

Below in conjunction with specific accompanying drawing and embodiment the utility model is further described.

As shown in the figure: the induction coil does not need to be cooled. The induction furnace has a furnace shell 1, and the bottom of the furnace shell 1 has refractory bricks on the bottom of the furnace. The bottom refractory bricks of the furnace are placed on the bottom of the crucible. Place the crucible 6 and the furnace 3 on the brick, and provide a spiral induction coil installation groove 4 on the outer wall or the inner wall of the furnace 3, and an induction coil 5 is installed in the induction coil installation groove 4, and the induction coil 5 is formed by It is formed by winding a single solid metal wire or alloy wire.

The number of turns of the induction coil 5 is 10-40 turns, the pitch of the induction coil 5 is 3-30 mm, and the diameter of the single-strand solid metal wire or single-strand solid alloy wire forming the induction coil 5 is 1-20 mm.

The induction coil 5 made of high-temperature-resistant metal wire or alloy material wire (diameter and length, which vary according to the heating power) is wound in the induction coil installation groove 4 on the outer wall of the furnace 3 made in advance. A certain length of material is reserved at both ends of the induction coil 5 for connection with the wires outside the furnace body, the wound induction coil 5 and the furnace 3 are put into the furnace body together, and the gap between the induction coil 5 and the furnace body 3 is filled Insulation material, put the heated body (crucible, or other metal materials) into the inner side of the furnace, the surrounding distance is even, and it is fixed, and the alternating current of appropriate frequency is passed through the induction coil (intermediate frequency, super audio frequency or high frequency 5~30KHz ), the crucible 6 in the induction coil 5 will sense the alternating current in the induction coil 5 to generate eddy current or circulating current, thereby generating heat, and the induction coil 5 itself will also generate a certain amount of heat, which will be transferred to the inside through the furnace 3 Crucible 6 or other heated body.

The induction coil 5 is wound on the outer wall of the furnace 3, and the advantages of this are:

1. The distance between the induction coil 5 and the heated body (crucible 6 or the induced body) can be made very close, which improves the induction efficiency;

2. The induction coil 5 does not need to be cooled, which saves a lot of trouble, for example, the cooling water tower necessary for the intermediate frequency furnace is not required;

3. There is no need to worry about the induction coil 5 being melted due to reasons such as cooling water cut-off;

4. The heat generated by the induction coil 5 itself is also fully utilized and quickly transferred to the heated body, saving a lot of energy;

5. The induction coil 5 has a long service life and is easy to maintain;

6. The furnace 3 isolates the induction coil 5 from the crucible 6 or other heated bodies, protecting the induction coil 5 from damage (the crucible often breaks, so that the high-temperature metal solution may be left out, causing the induction coil to short circuit or be damaged).

Claims (2)

1. An induction coil that does not need to be cooled is characterized in that: a spiral induction coil installation groove (4) is opened on the outer wall or inner wall of the furnace (3), and in the induction coil installation groove (4) An induction coil (5) is installed, and the induction coil (5) is formed by winding a single-strand solid metal wire or a single-strand solid alloy wire. 2. The induction coil without cooling as claimed in claim 1, characterized in that: the number of turns of the induction coil (5) is 10 to 40 turns, and the pitch of the induction coil (5) is 3 to 30 mm, forming The single-strand solid metal wire or the single-strand solid alloy wire of the induction coil (5) has a diameter of 1-20 mm.

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