CN213020942U - Medium frequency electric furnace - Google Patents

Abstract

The utility model relates to an intermediate frequency electric furnace, which belongs to the technical field of metal smelting production equipment and comprises a bottom frame, an upper frame hinged and matched with the bottom frame, a crucible arranged in the upper frame, a furnace mouth arranged on the upper surface of the upper frame and communicated with the crucible, an induction coil wound on the outer wall of the crucible and used for heating a workpiece, a spiral water pipe wound outside the induction coil and a strip water pipe uniformly distributed outside the crucible and fixedly connected with the outer side of the spiral water pipe, wherein the upper surface of the upper frame is fixedly provided with a gas collecting channel surrounding the furnace mouth, the gas collecting channel comprises a gas collecting hood and a gas collecting ring communicated with the gas collecting hood, the gas collecting ring surrounds the furnace mouth, the gas collecting hood is communicated with an exhaust device, the exhaust device comprises a moving pipe communicated with the gas collecting hood, a fixed pipe rotationally connected with the moving pipe and a bellows communicated with the fixed pipe, the utility model has the advantages of collecting and processing waste gas generated when, the effect of reducing the amount of exhaust gas that enters the air directly.

Description

Medium frequency electric furnace

Technical Field

The utility model relates to a technical field of metal melting production facility especially relates to an intermediate frequency electric stove.

Background

The medium frequency electric furnace is a power supply device for converting power frequency 50HZ alternating current into medium frequency (more than 300HZ to 10000 HZ), and comprises a frequency conversion device, a furnace body, a furnace front control part and the like; according to the basic principle of electromagnetic induction, three-phase power frequency alternating current is rectified and then converted into direct current, the direct current is converted into adjustable intermediate frequency current, the adjustable intermediate frequency current is supplied to a load consisting of a capacitor and an induction coil (the coil and the capacitor can be connected in parallel or in series), high-density magnetic lines are generated in the induction coil and cut metal materials contained in the induction coil, large eddy current is generated in the metal materials, and the metal materials can generate high temperature.

The prior Chinese patent with reference to publication No. CN206176996U discloses a medium-frequency electric furnace, which comprises a frame, a furnace body and a driving device, wherein a rotating mechanism is arranged between the side wall of the furnace body and the frame, a vice pot is arranged in the furnace body, the furnace body comprises a furnace opening communicated with the vice pot, an induction coil surrounding the vice pot and used for heating the vice pot is arranged outside the vice pot, an outflow opening connected with the vice pot is arranged on the furnace opening, be provided with on the furnace body with the fire door enclose and with the collection dirt passageway of egress opening looks adaptation, be provided with the collection dirt hole on the collection dirt passageway, the device that induced drafts has set firmly in the frame, be provided with connecting device between device and the collection dirt passageway induced drafts, connecting device includes fixed pipeline and follow-up pipeline, fixed pipeline and the device fixed connection that induced drafts, follow-up pipeline and furnace body fixed connection, fixed pipeline rotates with the follow-up pipeline to be connected and the cooperation intercommunication, and the axis of rotation of fixed pipeline and follow-up pipeline coincides with slewing mechanism's axis of rotation.

The above prior art solutions have the following drawbacks: when the intermediate frequency electric furnace pours the high-temperature liquid metal, the dust collecting channel can not completely absorb the waste gas from the furnace mouth into the air suction device, and part of the waste gas is still directly discharged in the workshop to pollute the working environment in the workshop.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an intermediate frequency electric stove has and collects and handle the waste gas that produces when will smelting metal work piece, reduces the effect of the volume in the direct entering air of waste gas.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides an intermediate frequency electric furnace, includes the chassis, with chassis articulated complex upper bracket, install in the inside crucible of upper bracket, set up in the upper surface of upper bracket and with the fire door of crucible intercommunication, the winding is used for heating the induction coil of work piece at the crucible outer wall, the spiral water pipe of winding outside the induction coil and the equipartition outside the crucible and with the outside fixed connection's of spiral water pipe strip water pipe, the fixed surface of upper bracket is provided with the gas collection passageway that surrounds the fire door, the gas collection passageway includes gas collecting channel and the gas collecting ring with the gas collecting channel intercommunication, the gas collecting ring surrounds the fire door, and the gas collecting channel intercommunication has exhaust apparatus, and exhaust apparatus includes the movable pipe with the gas collecting channel intercommunication, the fixed pipe of being connected with the movable pipe rotation and the bellows that communicates with the fixed pipe.

By adopting the technical scheme, the induction coil generates high-density magnetic lines and cuts the metal material contained in the crucible, a large eddy current is generated in the metal material, the metal material can generate high temperature to melt, the upper frame rotates around the bottom frame, and the liquid metal in the crucible can be poured out from the furnace mouth; cold water flows through the spiral water pipe and the strip water pipe to cool the outer wall of the crucible, the induction coil and the working temperature of a workshop; the gas collecting hood and the gas collecting ring can collect waste gas generated in the process of heating the metal workpiece, the collected waste gas enters the exhaust device, and the exhaust device treats the waste gas and then discharges clean air; when the metal workpiece is heated and liquid metal is poured, the gas collecting channel can collect waste gas emitted from the crucible, so that the amount of the waste gas directly entering air is reduced; when the upper frame rotates around the bottom frame, the gas collecting hood can enable the moving pipe to rotate around the fixed pipe, the moving pipe rotates around the fixed pipe, the connecting part of the moving pipe and the fixed pipe still keeps a sealing state, and the exhaust device is guaranteed to be capable of normally treating waste gas.

The utility model discloses further set up to: and a hydraulic cylinder is hinged between the bottom frame and the upper frame.

By adopting the technical scheme, the hydraulic cylinder can drive the upper frame to rotate around the bottom frame when stretching, so that the liquid metal in the crucible can be poured out from the furnace mouth or the upper frame after pouring the liquid metal is reset; the hydraulic cylinder can support the upper frame while the upper frame rotates around the bottom frame; the telescopic speed of the hydraulic cylinder is controlled to control the rotating speed of the upper frame around the bottom frame, and further control the speed of pouring the liquid metal.

The utility model discloses further set up to: the gas collecting hood and the gas collecting ring are both internally hollow shells, and dust filtering nets are arranged on the inner walls of the gas collecting hood and the gas collecting ring.

Through adopting above-mentioned technical scheme, the dust particle thing in the dust filter screen can filtering waste gas carries out first physical treatment to waste gas, and exhaust gas can be collected to shell structure's gas collecting channel and gas collecting ring, makes waste gas can get into in the exhaust apparatus.

The utility model discloses further set up to: the gas collecting ring is provided with a flow outlet, and the upper surface of the gas collecting ring is fixedly provided with flow blocking sheets at two sides of the flow outlet.

Through adopting above-mentioned technical scheme, the outflowing port is connected with emptys the tile, and liquid metal pours through the outflowing port, and the sheet that keeps off the flow can prevent that the upper bracket from bonding in the lateral wall and the upper surface of gas collecting channel at the liquid metal of empting, and the sheet that keeps off the flow can protect the gas collecting ring to make the gas collecting ring keep clean intact.

The utility model discloses further set up to: an arc groove is formed in the matching position of the upper surface of the upper frame and the outflow opening, and a dumping tile is fixedly matched in the arc groove.

Through adopting above-mentioned technical scheme, the tile is emptyd to the circular arc groove can accept, and the circular arc groove is spacing to toppling over the tile.

The utility model discloses further set up to: empty tile and the seamless laminating of crucible, the recess has been seted up to the circular arc inslot, and the lower fixed surface of empting the tile is provided with the sand grip, sand grip and recess grafting cooperation.

By adopting the technical scheme, the seamless joint of the dumping tiles and the crucible can ensure that liquid metal cannot leak from the joint of the dumping tiles and the crucible when the liquid metal is dumped on the upper frame; the insertion fit of the convex strips and the grooves can ensure that the tilting tiles are fixed on the upper surface of the upper frame, so that the tilting tiles are prevented from falling off accidentally when the upper frame tilts liquid metal; when the tile is dumped in need clearance, will empty the tile and take out in the recess of putting on the shelf, will empty the tile again after the clearance finishes and install to the recess in can.

The utility model discloses further set up to: and a rolling bearing is fixedly arranged at the joint of the moving pipe and the fixed pipe.

By adopting the technical scheme, the rolling bearing can enable the moving pipe to rotate around the axis of the fixed pipe, and meanwhile, the rolling bearing is connected with the moving pipe and the fixed pipe; when the upper frame dumps the liquid metal, the gas collecting hood can drive the moving pipe to rotate around the axis of the fixed pipe under the action of the rolling bearing, and the process of dumping the liquid metal is completed.

The utility model discloses further set up to: the outer wall of the joint of the moving pipe and the fixed pipe is fixedly provided with a corrugated pipe sealing element.

Through adopting above-mentioned technical scheme, bellows seal can seal the junction of moving pipe and deciding the pipe, prevents this junction leakage waste gas.

The utility model discloses further set up to: the air box is communicated with a water tank, and water used for filtering impurities in the waste gas is contained in the water tank.

Through adopting above-mentioned technical scheme, the impurity in the waste gas that comes from the bellows is adsorbed to the water in the water tank and is handled, and the waste gas after the processing becomes the clean gas that can discharge in the air.

The utility model discloses further set up to: the axis of the rolling bearing is coaxial with the axis of the upper frame rotating around the underframe.

By adopting the technical scheme, the axial line of the rolling bearing is coaxial with the axial line of the upper frame rotating around the underframe, so that the effect that the moving pipe can synchronously rotate around the axial line of the fixed pipe by means of the rolling bearing when the upper frame rotates around the underframe can be achieved; if the axis of the rolling bearing is not coaxial with the axis of the upper frame rotating around the bottom frame, the upper frame cannot pour the liquid metal.

To sum up, the utility model discloses a following at least one useful technological effect:

1. by arranging the gas collection channel, the gas collection channel can collect the waste gas emitted from the crucible when the metal is heated by the induction coil or the liquid metal is poured on the upper frame, so that the amount of the waste gas directly entering the air is reduced;

2. by arranging the water tank and adding water into the water tank, water can adsorb impurities in waste gas, clean the waste gas and discharge clean gas;

3. through setting up spiral water pipe and strip water pipe, the cold water that flows through spiral water pipe and strip water pipe can cool off the outer wall of crucible, induction coil and workshop operating temperature.

Drawings

FIG. 1 is a schematic view of the structure of a metal workpiece being heated in this embodiment;

FIG. 2 is a schematic diagram of a liquid metal pouring operation according to the present embodiment;

FIG. 3 is a top plan view of the upper surface of the upper frame concealing the gas collecting channel and exhaust;

FIG. 4 is a schematic view of the structure of the upper frame intended to emphasize the grooves;

FIG. 5 is an exploded schematic view intended to emphasize the gas gathering ring;

FIG. 6 is a schematic view of the construction of the dump tile;

figure 7 is a schematic view aimed at emphasizing the structure of the rolling bearing;

FIG. 8 is a schematic structural view of a spiral water pipe;

fig. 9 is a schematic structural view of a strip-shaped water pipe.

In the figure, 1, a chassis; 2. putting on a shelf; 21. a spiral water pipe; 22. a strip-shaped water pipe; 23. a furnace mouth; 24. dumping tiles; 241. a convex strip; 25. an arc groove; 251. a groove; 3. a crucible; 4. an induction coil; 5. a hydraulic cylinder; 6. a gas collection channel; 61. a gas collecting ring; 611. an outflow port; 612. a flow blocking sheet; 62. a gas-collecting hood; 63. a dust filter screen; 7. an exhaust device; 71. pipe fixing; 72. a moving pipe; 73. an air box; 74. an exhaust fan; 75. a water tank; 751. an exhaust pipe; 76. a bellows seal; 77. a rolling bearing; 78. an inclined tube; 8. a base.

Detailed Description

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

Referring to fig. 1 and 2, for the utility model discloses an intermediate frequency electric furnace, including chassis 1, with chassis 1 articulated complex upper rack 2, install in 2 inside crucibles of upper rack, set up in 2 upper surfaces of upper rack and with 3 furnace mouths 23 of intercommunication of crucibles, fixed mounting surround the gas collection passageway 6 of furnace mouth 23 and with the exhaust apparatus 7 of gas collection passageway 6 intercommunication at 2 upper surfaces of upper rack.

Referring to fig. 2 and 3, the base frame 1 is L-shaped, and the base frame 1 supports the upper frame 2; the inside fixed mounting of upper bracket 2 has crucible 3 that holds the work piece, and the outer wall of crucible 3 is fixed to be twined has the induction coil 4 of heating the work piece, and the fixed winding in outside of induction coil 4 has spiral water pipe 21, and the outside of spiral water pipe 21 bonds and has the axis that is on a parallel with crucible 3 and around the strip water pipe 22 of 3 circumference equipartitions of crucible, strip water pipe 22 and upper bracket 2 fixed connection.

Referring to fig. 1 and 4, a hydraulic cylinder 5 is hinged between the upper frame 2 and the bottom frame 1, and the hydraulic cylinder 5 can drive the upper frame 2 to rotate around the hinged position of the upper frame 2 and the bottom frame 1; the gas collecting channel 6 comprises a gas collecting ring 61 fixedly mounted on the upper surface of the upper frame 2 and a gas collecting hood 62 communicated with the gas collecting ring 61, the gas collecting ring 61 and the gas collecting hood 62 are both of hollow shell structures, the inner walls of the gas collecting hood 62 and the gas collecting ring 61 are both provided with dust filtering nets 63 for filtering dust, and the dust filtering nets 63 are formed by porous structures arranged on the inner walls of the gas collecting hood 62 and the gas collecting ring 61; a flow outlet 611 is formed in the position, close to the hinged joint of the upper frame 2 and the bottom frame 1, of the gas collecting ring 61, flow blocking sheets 612 are fixedly arranged on the upper surface of the gas collecting ring 61 and positioned on two sides of the flow outlet 611, and the flow blocking sheets 612 can prevent liquid metal from being bonded to the upper surface and the side wall of the gas collecting ring 61 when the liquid metal is poured from the crucible 3; an arc groove 25 is formed at the matching position of the upper surface of the upper frame 2 and the outflow port 611, and a dumping tile 24 is fixedly matched in the arc groove 25.

Referring to fig. 2 and 7, the exhaust device 7 includes a moving pipe 72 communicating with the gas collecting hood 62, a fixed pipe 71 rotatably connected to the moving pipe 72, an air box 73 communicating with the fixed pipe 71, and a water tank 75 communicating with the air box 73; the lower surfaces of the water tank 75 and the air box 73 are fixedly connected with a base 8, and the base 8 is fixedly arranged on the ground; an exhaust pipe 751 is communicated with the upper surface of the water tank 75, an inclined pipe 78 is communicated between the water tank 75 and the air box 73, the communication position of the inclined pipe 78 and the water tank 75 is close to the bottom of the water tank 75, the communication position of the inclined pipe 78 and the air box 73 is close to the top of the air box 73, water for adsorbing harmful impurities in the waste gas is contained in the water tank 75, the liquid level of the water is lower than the height of the communication position of the inclined pipe 78 and the air box 73, and an exhaust fan 74 for pumping the waste gas into the gas collection channel 6 and the exhaust device 7 and exhausting the waste gas out of the exhaust device 7 is fixedly arranged in the; a rolling bearing 77 is fixedly arranged between the fixed pipe 71 and the moving pipe 72, the axis of the rolling bearing 77 is coaxial with the axis of the rotation of the upper frame 2 around the underframe 1, so that when the upper frame 2 rotates around the underframe 1, the moving pipe 72 can rotate around the fixed pipe 71 by virtue of the rolling bearing 77, the moving pipe 72 can keep synchronous rotation with the upper frame 2, the inner wall of the fixed pipe 71 is fixedly connected with the outer ring of the rolling bearing 77, and the outer wall of the moving pipe 72 is fixedly connected with the inner ring of the rolling bearing 77; the bellows seal 76 is fixedly connected to the joint of the fixed pipe 71 and the moving pipe 72, two ends of the bellows seal 76 are fixedly connected with the outer wall of the fixed pipe 71 and the outer wall of the moving pipe 72 respectively, the bellows seal 76 has circumferential deformability that one end is fixed and the other end rotates around the axis of the bellows seal 76, and the bellows seal 76 can prevent the joint of the fixed pipe 71 and the moving pipe 72 from leaking exhaust gas.

Referring to fig. 4 and 6, a groove 251 is formed in the arc groove 25, the tilting pad 24 is seamlessly attached to the upper surface of the crucible 3, and a convex strip 241 inserted into the groove 251 is fixedly arranged on the lower surface of the tilting pad 24; when tile 24 is emptyd in needs clearance, will emptys tile 24 and take out in the arc groove 25 of upper ledge 2, after the clearance finishes again will emptys tile 24 and install to the arc groove 25 in can.

Referring to fig. 8 and 9, the cross section of the spiral water pipe 21 is rectangular, and the spiral water pipe 21 is provided with a water inlet and a water outlet; the strip water pipe 22 is provided with a water inlet and a water outlet, and cold water can cool the outer wall of the crucible 3, the induction coil 4 and the working temperature of a workshop when flowing through the spiral water pipe 21 and the strip water pipe 22.

The implementation principle of the embodiment is as follows: firstly, a workpiece to be smelted is poured into a crucible 3, a power supply of an electric furnace is switched on, an induction coil 4 generates high-density magnetic lines, the magnetic lines cut metal materials contained in the crucible 3, large eddy currents are generated in the metal materials, and the metal materials can generate high temperature to be smelted; cold water flows through the spiral water pipe 21 and the strip water pipe 22 to cool the outer wall of the crucible 3, the induction coil 4 and the working temperature of a workshop; when the power supply of the electric furnace is switched on, the exhaust fan 74 starts to operate, waste gas generated in the process of smelting workpieces firstly enters the gas collecting ring 61 and the gas collecting hood 62, the dust filtering net 63 on the inner wall of the gas collecting ring 61 and the gas collecting hood 62 can filter dust particles in the waste gas to prevent the gas collecting channel 6 and the exhaust device 7 from being blocked, then the waste gas sequentially enters the fixed pipe 71, the movable pipe 72, the air box 73 and the water tank 75, water in the water tank 75 can adsorb harmful impurities in the waste gas, and air pollution caused by the waste gas is avoided.

When the workpiece is completely melted, the hydraulic cylinder 5 is started, the hydraulic cylinder 5 gradually extends, the hydraulic cylinder 5 drives the upper frame 2 to rotate around the hinged position of the upper frame 2 and the underframe 1, the angle between the hydraulic cylinder 5 and the upper frame 2 and the underframe 1 is constantly changed, the upper frame 2 synchronously rotates the movable pipe 72 around the fixed pipe 71 by means of the gas collecting hood 62 while rotating the upper frame 2, the corrugated pipe sealing piece 76 is twisted and deformed around the axis of the corrugated pipe sealing piece 76, and the corrugated pipe sealing piece 76 can prevent waste gas from leaking from the connecting position of the fixed pipe 71 and the movable pipe 72; the liquid metal in the crucible 3 is continuously poured out through the pouring tile 24 along with the continuous rotation of the upper frame 2 around the bottom frame 1, the extending speed of the hydraulic cylinder 5 is controlled to control the speed of pouring the liquid metal, after the liquid metal is poured, the hydraulic cylinder 5 is contracted, the hydraulic cylinder 5 enables the upper frame 2 to rotate around the bottom frame 1 to be in a vertical state, and meanwhile, the moving pipe 72 rotates around the fixed pipe 71 to be in an initial state; when iron slag is adhered to the upper surface of the dumping tile 24, the dumping tile 24 is taken out from the groove 251 of the upper frame 2 for cleaning, and after the dumping tile 24 is cleaned, the dumping tile 24 is installed to the original position; the flow blocking sheet 612 can prevent the liquid metal from being bonded on the inner wall and the upper surface of the gas collecting ring 61 in the process of pouring the liquid metal on the upper frame 2, and the integrity and cleanness of the gas collecting ring 61 are ensured.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The utility model provides an intermediate frequency electric furnace, including chassis (1), with chassis (1) articulated complex upper bracket (2), install in crucible (3) of upper bracket (2) inside, set up in the upper surface of upper bracket (2) and with fire door (23) of crucible (3) intercommunication, winding induction coil (4) that crucible (3) outer wall is used for heating the work piece, winding spiral water pipe (21) and equipartition in the crucible (3) outside and with the outside fixed connection's of spiral water pipe (21) strip water pipe (22), its characterized in that: the upper surface of the upper frame (2) is fixedly provided with a gas collecting channel (6) surrounding the furnace mouth (23), the gas collecting channel (6) comprises a gas collecting hood (62) and a gas collecting ring (61) communicated with the gas collecting hood (62), the gas collecting ring (61) surrounds the furnace mouth (23), the gas collecting hood (62) is communicated with an exhaust device (7), and the exhaust device (7) comprises a moving pipe (72) communicated with the gas collecting hood (62), a fixed pipe (71) rotationally connected with the moving pipe (72) and an air box (73) communicated with the fixed pipe (71).

2. A medium frequency electric furnace according to claim 1, characterized in that: a hydraulic cylinder (5) is hinged between the bottom frame (1) and the upper frame (2).

3. A medium frequency electric furnace according to claim 2, characterized in that: the gas collecting hood (62) and the gas collecting ring (61) are both internally hollow shells, and the inner wall of the gas collecting hood (62) and the inner wall of the gas collecting ring (61) are both provided with a dust filtering net (63).

4. A medium frequency electric furnace according to claim 3, wherein: the gas collecting ring (61) is provided with a flow outlet (611), and the upper surface of the gas collecting ring (61) is fixedly provided with flow blocking sheets (612) at two sides of the flow outlet (611).

5. The medium frequency electric furnace according to claim 4, wherein: an arc groove (25) is formed in the matching position of the upper surface of the upper frame (2) and the outflow opening (611), and a dumping tile (24) is fixedly matched in the arc groove (25).

6. The medium frequency electric furnace according to claim 5, wherein: the pouring tile (24) is attached to the crucible (3) in a seamless mode, a groove (251) is formed in the arc groove (25), a protruding strip (241) is fixedly arranged on the lower surface of the pouring tile (24), and the protruding strip (241) is in plug-in fit with the groove (251).

7. The medium frequency electric furnace according to claim 6, wherein: and a rolling bearing (77) is fixedly arranged at the joint of the moving pipe (72) and the fixed pipe (71).

8. The medium frequency electric furnace according to claim 7, wherein: and a bellows sealing piece (76) is fixedly arranged on the outer wall of the joint of the moving pipe (72) and the fixed pipe (71).

9. The medium frequency electric furnace according to claim 8, wherein: the air box (73) is communicated with a water tank (75), and water used for filtering impurities in the waste gas is contained in the water tank (75).

10. A medium frequency electric furnace according to claim 9, wherein: the axis of the rolling bearing (77) is coaxial with the axis of the upper frame (2) rotating around the bottom frame (1).

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