Resistance tape heating and holding furnace

Abstract

The utility model discloses a resistance band heating and holding furnace which comprises a steel outer cylinder, a heat preservation asbestos layer is fixed on the inner side wall of the steel outer cylinder, and resistance heating bands extending annularly are installed on the upper portion, the middle portion and the lower portion of the inner wall face of the heat preservation asbestos layer. A crucible is inserted in the steel outer cylinder body in a sleeved mode, and the outer side wall of the crucible is close to the resistance heating belt. The resistance heating belt capable of heating automatically is arranged between the heat preservation asbestos layer and the crucible, and the resistance heating belt is long, so that the temperature of molten aluminum in the crucible is basically not reduced, and the heat preservation effect is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of aluminum alloy product processing equipment, and more specifically to a resistance belt heating and insulation furnace. Background technology:

[0002] The existing insulation furnace is generally provided with an outer cylinder on the outside, and an insulation layer is fixed on the inner wall and bottom of the outer cylinder. Then, the crucible is inserted into the outer cylinder, and the space between the crucible and the outer cylinder is filled with insulation cotton to achieve insulation. At the same time, it is generally installed with a resistance heating belt on the surface of the insulation layer, and generally a circle is set at the upper, middle and lower parts respectively in accordance with the wall surface. The length of the resistance heating belt is limited, so that its heating effect is limited. Utility model content:

[0003] The purpose of the utility model is to provide a resistance belt heating and insulation furnace to address the deficiencies of the prior art. A resistance heating belt that can be heated independently is arranged between the insulation asbestos layer and the crucible. The resistance heating belt is coiled in an S shape and installed on the inner side of the insulation asbestos layer through ceramic pins, thereby increasing the length of the resistance heating belt and improving the heating and insulation effect on the crucible.

[0004] The technical solutions of the utility model are as follows:

[0005] A resistance band heating and insulation furnace, comprising a steel outer cylinder, an insulation asbestos layer is fixed on the inner side wall of the steel outer cylinder, and an annularly extending resistance heating band is installed on the upper, middle and lower parts of the inner wall surface of the insulation asbestos layer;

[0006] A crucible is inserted into the steel outer cylinder, and the outer side wall of the crucible is close to the resistance heating belt.

[0007] A bottom insulation layer consisting of a plurality of insulation bricks is laid on the top surface of the bottom plate of the steel outer cylinder, and the bottom surface of the crucible is pressed against the top surface of the bottom insulation layer.

[0008] The steel outer cylinder is a circular cylinder, and a radially inwardly extending annular edge is formed on the inner wall of the top thereof. The top surface of the thermal insulation asbestos layer is fixed on the bottom surface of the annular edge, and the bottom surface of the thermal insulation asbestos layer is fixed on the top surface of the bottom thermal insulation layer.

[0009] A plurality of ceramic pins are fixed to the upper, middle and lower parts of the inner side wall of the chrysotile layer;

[0010] All the ceramic pins are wrapped with resistance heating tapes.

[0011] The lower part of the inner side wall of the annular edge is formed with a radially extending annular portion, the bottom surface of the outer side edge of the crucible annular fixing plate is pressed against the top surface of the annular portion and fixed, and the inner side wall of the crucible annular fixing plate is tightly attached to the top outer side wall of the crucible and fixed.

[0012] The beneficial effects of the utility model are:

[0013] A resistance heating belt capable of self-heating is arranged between the thermal insulation asbestos layer and the crucible, and the resistance heating belt is coiled in an S shape and installed on the inner side of the thermal insulation asbestos layer through ceramic pins, thereby increasing the length of the resistance heating belt and improving the heating and heat preservation effect on the crucible. Description of the drawings:

[0014] Figure 1 It is a partial structural schematic diagram of the utility model;

[0015] Figure 2 Schematic diagram of the local structure between the resistance heating belt and the ceramic pin. Specific implementation method:

[0016] For example, see Figures 1 to 2 As shown, a resistance band heating and insulation furnace comprises a steel outer cylinder 10, an insulation asbestos layer 20 is fixed on the inner wall of the steel outer cylinder 10, and an annularly extending resistance heating belt 30 is installed on the upper, middle and lower parts of the inner wall of the insulation asbestos layer 20; the steel outer cylinder 10 is a circular cylinder, and a radially inwardly extending annular edge 12 is formed on the inner wall of its top, the top surface of the insulation asbestos layer 20 is fixed on the bottom surface of the annular edge 12, and the bottom surface of the insulation asbestos layer 20 is fixed on the top surface of the bottom insulation layer 11.

[0017] Furthermore, a crucible 40 is inserted into the steel outer cylinder 10 , and the outer wall of the crucible 40 is close to the resistance heating belt 30 .

[0018] Furthermore, a bottom insulation layer 11 composed of a plurality of insulation bricks is laid on the top surface of the bottom plate of the steel outer cylinder 10 , and the bottom surface of the crucible 40 is pressed against the top surface of the bottom insulation layer 11 .

[0019] A plurality of ceramic pins 1 are fixed to the upper, middle and lower parts of the inner side wall of the thermal insulation asbestos layer 20;

[0020] All the ceramic pins 1 in the upper part form an upper pin group, all the ceramic pins 1 in the middle part form a middle pin group, and all the ceramic pins 1 in the lower part form a lower pin group. The upper pin group, the middle pin group and the lower pin group are all wrapped with a resistance heating belt 30.

[0021] The upper pin group, the middle pin group and the lower pin group each include a first pin group and a second pin group consisting of a plurality of ceramic pins 1, all the ceramic pins 1 of the first pin group and the second pin group are fixed on the inner wall surface of the thermal insulation asbestos layer 20 in a circular arrangement, and all the ceramic pins 1 of the first pin group are staggered with all the ceramic pins 1 of the second pin group, that is, the lower part between two adjacent ceramic pins 1 of the first pin group faces a corresponding ceramic pin 1 of the second pin group;

[0022] The first pin group is above the second pin group, the heads of all ceramic pins 1 extend out of the inner wall of the thermal insulation asbestos layer 20 and a gap is formed between the heads and the inner wall surface of the thermal insulation asbestos layer 20, and the resistance heating belt 30 is at the corresponding gap.

[0023] Furthermore, a radially extending annular portion is formed at the lower portion of the inner side wall of the annular edge portion 12, the bottom surface of the outer side edge portion of the crucible annular fixing plate 13 is pressed against the top surface of the annular portion and fixed, and the inner side wall of the crucible annular fixing plate 13 is tightly attached to the top outer side wall of the crucible 40 and fixed.

[0024] All the ceramic pins 1 of the first pin group and the second pin group are evenly distributed on the inner wall surface of the thermal insulation asbestos layer 20 with the central axis of the steel outer cylinder 10 as the center.

[0025] The resistance heating belt 30 in this embodiment is wound around the rod portion at the head of a ceramic pin 1 of the first pin group, then wound around the rod portion at the head of the corresponding ceramic pin 1 of the second pin group below it, and then wound around the rod portion at the head of the corresponding ceramic pin 1 of the first pin group above it, and is alternately wound in this way to form an S-shaped coil and an annular arrangement, and its end extends out of the crucible annular fixing plate 13 or the annular edge 12 and is connected to a plug through an electrical connecting line, which can be inserted into an external power socket to achieve power supply.

[0026] Since the three resistance heating belts 30 are coiled in an S shape and arranged in a ring shape, the length thereof at the inner wall of the thermal insulation asbestos layer 20 is increased, thereby increasing the heating amount, so that the temperature of the space between the thermal insulation asbestos layer 20, the bottom thermal insulation layer 11 and the crucible 40 is increased quickly and the thermal insulation is good, thereby achieving thermal insulation of the aluminum liquid inside the crucible 40, ensuring the liquid state of the aluminum liquid, and ensuring the subsequent casting needs.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A resistance belt heating and holding furnace, comprising a steel outer cylinder (10), characterized in that: A thermal insulation asbestos layer (20) is fixed on the inner side wall of the steel outer cylinder (10), and an annularly extending resistance heating belt (30) is installed on the upper, middle and lower parts of the inner wall surface of the thermal insulation asbestos layer (20); A crucible (40) is inserted into the steel outer cylinder (10), and the outer wall of the crucible (40) is close to the resistance heating belt (30).

2. The resistance belt heating and holding furnace according to claim 1, characterized in that: A bottom insulation layer (11) composed of a plurality of insulation bricks is laid on the top surface of the bottom plate of the steel outer cylinder (10), and the bottom surface of the crucible (40) is pressed against the top surface of the bottom insulation layer (11).

3. The resistance belt heating and holding furnace according to claim 2, characterized in that: The steel outer cylinder (10) is a circular cylinder, and an annular edge (12) extending radially inward is formed on the inner side wall of the top thereof; the top surface of the thermal insulation asbestos layer (20) is fixed on the bottom surface of the annular edge (12), and the bottom surface of the thermal insulation asbestos layer (20) is fixed on the top surface of the bottom thermal insulation layer (11).

4. The resistance belt heating and holding furnace according to claim 1, characterized in that: A plurality of ceramic pins (1) are fixed to the upper, middle and lower parts of the inner wall of the thermal insulation asbestos layer (20); All the ceramic pins (1) at the upper part form an upper pin group, all the ceramic pins (1) at the middle part form a middle pin group, and all the ceramic pins (1) at the lower part form a lower pin group.

5. The resistance belt heating and holding furnace according to claim 4, characterized in that: The upper pin group, the middle pin group and the lower pin group all include a first pin group and a second pin group consisting of a plurality of ceramic pins (1), all the ceramic pins (1) of the first pin group and the second pin group are fixed on the inner wall surface of the thermal insulation asbestos layer (20) in a circular arrangement, the first pin group is above the second pin group, a spacing is formed between the heads of all the ceramic pins (1) and the inner wall surface of the thermal insulation asbestos layer (), and the resistance heating belt (30) is located at the corresponding spacing.

6. The resistance belt heating and holding furnace according to claim 5, characterized in that: The upper pin group, the middle pin group and the lower pin group are all wound with a resistance heating belt (30).

7. The resistance belt heating and holding furnace according to claim 3, characterized in that: A radially extending annular portion is formed at the lower portion of the inner side wall of the annular edge portion (12); the bottom surface of the outer side edge portion of the crucible annular fixing plate (13) is pressed against the top surface of the annular portion and fixed; and the inner side wall of the crucible annular fixing plate (13) is tightly attached to the outer side wall of the top of the crucible (40) and fixed.

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