Novel intermediate frequency furnace

Abstract

The utility model discloses a novel intermediate frequency furnace, which comprises a furnace body, a ventilation ring, a ventilation pipe and a dust hood, the ventilation pipe is tightly connected with an air inlet on the ventilation ring through a fastener, a plurality of blowpipes are arranged on the ventilation ring, the blowpipes are circumferentially and uniformly arranged, and the dust hood is arranged on the ventilation ring. An air opening of the air blowing pipe points to the axial lead direction of the ventilation ring and forms an inclined angle with the ventilation ring, an inner hole of the air blowing pipe is communicated with an inner hole of the ventilation ring, a notch is formed in the ventilation ring, the size of the notch is matched with the size of a tapping hole of the electric furnace, and the cross section of the notch of the ventilation ring is sealed and not ventilated. The inner diameter of the ventilation ring is matched with the outer diameter of the furnace mouth of the electric furnace, so that the ventilation ring is sleeved on the furnace mouth of the electric furnace, the electric furnace dust hood is arranged right above the ventilation ring, and the problem that the dust removal effect is not ideal due to the fact that smoke dust of an intermediate frequency furnace using a top suction type dust hood is difficult to completely capture is solved.

Description

Technical Field

[0001] This utility model relates to the field of medium frequency furnace technology, specifically a novel medium frequency furnace. Background Technology

[0002] An intermediate frequency furnace is a power supply device that converts 50Hz AC power into intermediate frequency (300Hz to 1000Hz). It rectifies three-phase AC power into DC power, then converts the DC power into adjustable intermediate frequency current, which is supplied to the intermediate frequency alternating current flowing through the capacitor and induction coil. This generates high-density magnetic lines of force in the induction coil, which cut the metal material placed in the induction coil and generate large eddy currents in the metal material. It is widely used in the smelting of non-ferrous and ferrous metals.

[0003] Existing medium-frequency furnaces generate significant amounts of smoke and dust during the smelting process. To eliminate smoke and dust, improve the working environment, and reduce air pollution, the main dust collection devices for medium-frequency furnaces in the current technology are side-suction or top-suction electric furnace dust hoods and the newer tilting electric furnace dust hoods.

[0004] Side-suction dust hoods, designed to be positioned on one side of the furnace opening and to ensure the capture of rising high-temperature fumes, are often designed as high-position side-suction hoods. However, they tend to draw in too much air during the suction process, making them far less effective than top-suction dust hoods. Newer, tilting dust hoods have only recently emerged and are more expensive to manufacture, thus not yet widely adopted. Therefore, top-suction dust hoods are more commonly used in induction furnaces.

[0005] However, in order to facilitate feeding, smelting, tapping molten iron and removing slag, the top-mounted dust hood is located a large distance from the furnace opening, which makes it easy for the smoke and dust to spread during the rising process. In addition, the influence of air flow in the workshop makes it even more difficult to completely capture the smoke and dust, resulting in an unsatisfactory dust removal effect. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of medium-frequency furnace. This invention solves the problem that the distance between the top-suction dust hood and the furnace opening of the medium-frequency furnace is relatively large, which makes it easy for the smoke and dust to spread during the rising process. In addition, the influence of the air flow in the workshop makes it even more difficult to completely capture the smoke and dust, resulting in an unsatisfactory dust removal effect.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A novel medium-frequency furnace is characterized by comprising a furnace body, a ventilation ring, ventilation pipes, and a dust collection hood. The ventilation pipes are tightly connected to the air inlets on the ventilation ring via fasteners. The ventilation ring is provided with multiple air blowing pipes arranged evenly in a circle. The air outlets of the air blowing pipes point towards the centerline of the ventilation ring and are inclined at an angle to the ventilation ring. The inner holes of the air blowing pipes communicate with the inner holes of the ventilation ring. A notch is formed on the ventilation ring, the size of which matches the size of the electric furnace taphole. The cross-section of the notch is sealed to prevent air leakage. The inner diameter of the ventilation ring matches the outer diameter of the electric furnace opening, so that the ventilation ring fits onto the electric furnace opening.

[0009] Preferably, the blower tube has a short and thin tubular structure.

[0010] Preferably, the ventilation duct is equipped with a control valve.

[0011] Preferably, the ventilation ring is provided with 20-40 air blowing pipes.

[0012] Preferably, a furnace dust extraction hood is provided directly above the ventilation ring.

[0013] Preferably, the external structure of the electric furnace dust hood is conical.

[0014] The beneficial effects of this utility model are as follows: When the smoke and dust generated at the furnace mouth of the medium frequency furnace diffuses during its ascent and is affected by the airflow in the workshop, making it difficult to completely capture the smoke and dust, this utility model can effectively concentrate the diffused smoke and dust into the top suction dust hood, thereby improving dust collection efficiency, being quite economical and practical, and being easy to install and use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a top view of the electric furnace of this utility model after the auxiliary device has been installed;

[0017] In the diagram: 1. Control valve, 2. Ventilation pipe, 3. Ventilation ring, 4. Air blower, 5. Air inlet, 6. Electric furnace dust hood, 7. Electric furnace opening, 8. Electric furnace tapping port, 9. Furnace body. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] like Figure 1-2The present invention relates to a novel medium-frequency furnace, characterized in that it comprises a furnace body 9, a ventilation ring 3, a ventilation pipe 2, and a dust collection hood 6. The ventilation pipe 2 is tightly connected to the air inlet 5 on the ventilation ring 3 by fasteners. The ventilation ring 3 is provided with a plurality of air blowing pipes 4, which are evenly arranged in a circle. The air outlet of the air blowing pipe 4 points towards the axis of the ventilation ring 3 and is inclined at an angle to the ventilation ring 3. The inner hole of the air blowing pipe 4 communicates with the inner hole of the ventilation ring 3. A notch is provided on the ventilation ring 3. The size of the notch matches the size of the electric furnace tapping port 8, and the cross-section of the notch of the ventilation ring 3 is sealed and airtight. The inner diameter of the ventilation ring 3 matches the outer diameter of the electric furnace opening 7, so that the ventilation ring 3 is fitted onto the electric furnace opening 7.

[0020] Preferably, the blower 4 has a short, thin tubular structure. A control valve 1 is provided on the ventilation pipe 2. 20-40 blower pipes are provided on the ventilation ring. An electric furnace dust extraction hood is located directly above the ventilation ring. The electric furnace dust extraction hood has a conical shape.

[0021] This invention is implemented as follows: a control valve 1 is installed on the ventilation pipe 2, the ventilation pipe 2 is connected to the air inlet 5 on the ventilation ring 3, and the air blowing pipes 4 are evenly distributed on the ventilation ring 3. Control valve 1 is a stainless steel ball valve. Ventilation pipe 2 is a rubber hose with certain pressure and heat resistance. Ventilation pipe 2 enters the electric furnace working platform through a small hole on the side of the electric furnace opening 7, hangs freely down along the furnace body, and then extends out from another small hole on the electric furnace working platform away from the furnace opening 7, connecting to the control valve 1. It is then connected to the air source through fasteners. Ventilation ring 3 is made of metal and has a closed tubular ring structure. Only the connected air inlet 5 is the air inlet, and the air blower 4 is the air outlet. Ventilation ring 3 and the electric furnace opening 7 are concentric. Ventilation ring 3 is fixed to the electric furnace working platform around the furnace opening 7 through fasteners. There is an air inlet 5 on the side of ventilation ring 3. The air inlet 5 is connected to ventilation pipe 2 through fasteners. Air blower 4 is made of metal and is generally thin and short. The structure, welded together, is evenly distributed on the ventilation ring 3. The inner hole of the blower pipe 4 is connected to the inner hole of the ventilation ring 3 to ensure that the air in the ventilation ring 3 can be blown out from the blower pipe 4. All the blower pipes 4 are tilted at the same angle, slightly biased towards the vertical line of the center of the electric furnace opening 7. The blowing port of the blower pipe 4 is facing the center of the top suction electric furnace dust hood 6, so that a conical wind wall is formed between the outer perimeter of the electric furnace opening 7 and the top suction electric furnace dust hood 6. As the air blown out by the blower pipe 4 continuously moves towards the vertical line of the center of the electric furnace opening 7 during the upward process, the conical wind wall can effectively capture the smoke and dust that diffuses during the upward process, and as a downward thrust, accelerate the rise of the smoke and dust. At the same time, the conical wind wall can also effectively prevent the influence of the workshop airflow on the rising smoke and dust.

[0022] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. It is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel medium-frequency furnace, characterized in that, The furnace includes a furnace body (9), a ventilation ring (3), a ventilation pipe (2), and a dust hood (6). The ventilation pipe (2) is tightly connected to the air inlet (5) on the ventilation ring (3) by fasteners. The ventilation ring (3) is provided with multiple air blowing pipes (4). The air blowing pipes (4) are evenly arranged in a circle. The air outlet of the air blowing pipe (4) points to the axis of the ventilation ring (3) and is inclined at an angle to the ventilation ring (3). The inner hole of the air blowing pipe (4) is connected to the inner hole of the ventilation ring (3). A notch is opened on the ventilation ring (3). The size of the notch matches the size of the electric furnace tapping port (8). The cross-section of the notch of the ventilation ring (3) is sealed and airtight. The inner diameter of the ventilation ring (3) matches the outer diameter of the electric furnace opening (7), so that the ventilation ring (3) is fitted onto the electric furnace opening (7).

2. The novel medium-frequency furnace according to claim 1, characterized in that, The blower tube (4) has a short and thin tubular structure.

3. A novel medium-frequency furnace according to claim 1, characterized in that, The ventilation pipe (2) is equipped with a control valve (1).

4. A novel medium-frequency furnace according to claim 1, characterized in that, The ventilation ring (3) is provided with 20-40 air blowing pipes (4).

5. A novel medium-frequency furnace according to claim 1, characterized in that, An electric furnace dust extraction hood (6) is provided directly above the ventilation ring (3).

6. A novel medium-frequency furnace according to claim 5, characterized in that, The electric furnace dust hood (6) has a conical shape.

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