CN210533011U

CN210533011U - Aluminum alloy continuous melting furnace

Info

Publication number: CN210533011U
Application number: CN201921552625.3U
Authority: CN
Inventors: 吴应勇
Original assignee: Ningbo Dongcheng Qunli Machinery Co ltd
Current assignee: Ningbo Dongcheng Qunli Machinery Co ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-05-15
Anticipated expiration: 2029-09-18

Abstract

The utility model relates to the technical field of metal melting equipment, and discloses an aluminum alloy continuous melting furnace, which comprises a tower frame, wherein a melting furnace, a purifying furnace and a heat preservation furnace which are sequentially communicated are arranged on the tower frame, a furnace cover is arranged at the top of the melting furnace, a feeding mechanism is arranged on the furnace cover and comprises two storage hoppers, the storage hoppers run through the furnace cover, the lower ends of the storage hoppers are connected with a hollow guide cylinder, a cylindrical cylinder is arranged in the guide cylinder, the outer wall of the cylindrical cylinder is clung to the inner wall of the guide cylinder, and a plurality of discharging grooves are arranged on the side wall of the cylindrical cylinder; the furnace cover is also provided with a driving mechanism for driving the cylindrical drum to rotate. The driving mechanism can continuously drive the feeding mechanism to feed materials into the melting furnace, and the melting furnace is always kept in a vacuum state in the feeding process, so that the melting effect of the aluminum alloy is improved, and the melting efficiency is effectively improved.

Description

Aluminum alloy continuous melting furnace

Technical Field

The utility model relates to a metal melting equipment technical field especially relates to an aluminum alloy continuous melting furnace.

Background

In the process of smelting aluminum alloy, because the chemical activity of aluminum is very strong, the aluminum is easy to react with oxygen in the air to generate oxides, thereby causing great loss of aluminum material; therefore, at present, the smelting of the aluminum alloy is often carried out in a vacuum environment.

In the process of smelting aluminum alloy in vacuum, the aluminum alloy needs to be fed into a furnace body in batches. For vacuum melting, the feeding structure of the melting furnace is much more complicated than that of a common melting furnace, because the feeding mechanism of the vacuum melting furnace is required to ensure that raw materials are conveyed to a specified position and the vacuum degree of the system is not damaged.

The traditional continuous feeding means that feeding is carried out for two or three times in the smelting process, when raw materials are added into a furnace body, the furnace body is too long in opening time, the vacuum degree in the furnace body is reduced, and the smelting effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an aluminum alloy continuous melting furnace to realize that the aluminum alloy can carry out continuous automatic material conveying at the in-process of smelting, and do not destroy the vacuum in the furnace body.

In order to achieve the above purpose, the basic scheme of the utility model is as follows: an aluminum alloy continuous melting furnace comprises a tower frame, wherein the tower frame comprises an upper layer and a lower layer, a melting furnace is placed on the upper layer of the tower frame, a purification furnace and a heat preservation furnace which are communicated with each other are sequentially placed on the lower layer of the tower frame, a crucible is arranged in a hearth of the melting furnace, a furnace cover for sealing the melting furnace is installed at the top of the melting furnace, a feeding mechanism for feeding materials into the melting furnace is arranged on the furnace cover and comprises two storage hoppers for containing aluminum alloy, the storage hoppers penetrate through the furnace cover, the lower ends of the storage hoppers are connected with a hollow material guide cylinder, two opposite openings are formed in the side wall of the material guide cylinder, a cylindrical cylinder for taking materials is rotatably connected in the material guide cylinder, the outer wall of the cylindrical cylinder is tightly attached to the inner wall of the material guide cylinder, and a plurality of material discharge grooves are; the furnace cover is further provided with a driving mechanism used for driving the cylindrical drum to rotate, the driving mechanism comprises a motor installed at the top of the furnace cover, an output shaft of the motor penetrates through the furnace cover, the output shaft of the motor is coaxially connected with a first bevel gear, two sides of the first bevel gear are respectively meshed with a second bevel gear, the second bevel gear is coaxially connected with a rotating shaft, and the rotating shaft axially penetrates through the material guide drum and is fixedly connected with the cylindrical drum in a coaxial mode.

Further, a first feeding pipe is connected between the melting furnace and the purifying furnace, a first stop valve is installed on the first feeding pipe, a second feeding pipe is connected between the purifying furnace and the heat preserving furnace, and a second stop valve is installed on the second feeding pipe; the outer walls of the first feeding pipe and the second feeding pipe are both wrapped with heat preservation cotton.

Furthermore, an exhaust pipe penetrates through the side wall of the melting furnace, an exhaust stop valve is installed on the exhaust pipe, and the tail end of the exhaust pipe is connected with a vacuum air pump used for extracting air in the hearth.

Further, an air inlet pipe penetrates through the side wall of the melting furnace, an air inlet stop valve is installed on the air inlet pipe, the tail end of the air inlet pipe is connected with a high-pressure air tank used for blowing air into the hearth, and inert gas is contained in the high-pressure air tank.

Furthermore, heating resistance wires for heating the crucible are densely distributed on the inner wall of the hearth, and the heating resistance wires are spirally distributed on the inner wall of the hearth.

Furthermore, a stirring assembly for stirring the molten metal is installed on an output shaft of the motor, the stirring assembly comprises a stirring rod coaxially connected to the output shaft of the motor, and stirring blades are densely distributed on the stirring rod.

Further, be equipped with filtering component in the purification stove, filtering component includes the filter screen that at least three-layer from top to bottom distributes in proper order, and the aperture of filter screen reduces from top to bottom gradually.

Furthermore, the outer wall of the heat-insulating furnace is wrapped with a multi-layer composite heat-insulating layer, and the heat-insulating layer consists of rock wool boards, steel wire mesh sandwich boards and polystyrene boards.

Compared with the prior art, the scheme has the beneficial effects that:

1. the driving mechanism can continuously drive the cylindrical barrel to rotate, so that the aluminum alloy solid in the storage hopper is conveyed to the crucible of the melting furnace through the feeding groove of the cylindrical barrel, and the aluminum alloy solid in the crucible is melted by the heating resistance wire matched with the inner wall of the hearth, so that the efficiency is effectively improved.

2. Before the melting operation, the vacuum air pump is to pumping air to the vacuum state in the crucible, because the outer wall of cylinder hugs closely with the inner wall of guide cylinder, the in-process of cylinder rotation in the guide cylinder can not introduce external air into the melting furnace, makes the feeding mechanism in the in-process of continuously throwing the material to the melting furnace, keeps the vacuum state in the melting furnace all the time, avoids the aluminum alloy of high temperature state to take place the oxidation to improve the effect of smelting of aluminum alloy.

Drawings

FIG. 1 is a schematic structural view of an aluminum alloy continuous melting furnace according to the present invention;

FIG. 2 is a schematic sectional view of the melting furnace shown in FIG. 1;

FIG. 3 is a schematic sectional view of the purification furnace shown in FIG. 1.

Reference numerals in the drawings of the specification include: the device comprises a tower frame 1, a melting furnace 2, a first feeding pipe 21, a first stop valve 22, a crucible 23, a heating resistance wire 24, a purifying furnace 3, a second feeding pipe 31, a second stop valve 32, a filter screen 33, a holding furnace 4, a discharging pipe 41, a plugging head 42, an air suction pipe 5, a vacuum air suction pump 51, an air suction stop valve 52, an air inlet pipe 6, a high-pressure air tank 61, an air inlet stop valve 62, a furnace cover 7, a motor 71, a first bevel gear 72, a second bevel gear 73, a rotating shaft 74, a storage hopper 8, a guide cylinder 81, a cylindrical cylinder 82, a discharging groove 83, a stirring rod 9, a coupling 91 and a stirring blade 92.

Detailed Description

The invention will be described in further detail by means of specific embodiments with reference to the accompanying drawings:

example (b):

an aluminum alloy continuous melting furnace, as shown in figure 1, comprises a tower 1, wherein the tower 1 comprises an upper layer and a lower layer, a melting furnace 2 is placed on the upper layer of the tower 1, a purification furnace 3 and a heat preservation furnace 4 which are communicated with each other are sequentially placed on the lower layer of the tower 1, a first feeding pipe 21 is connected between the melting furnace 2 and the purification furnace 3, a first stop valve 22 is installed on the first feeding pipe 21, a second feeding pipe 31 is connected between the purification furnace 3 and the heat preservation furnace 4, and a second stop valve 32 is installed on the second feeding pipe 31; the outer walls of the first feeding pipe 21 and the second feeding pipe 31 are coated with heat insulation cotton.

As shown in fig. 1 and 2, a crucible 23 is provided in a hearth of the melting furnace 2, heating resistance wires 24 for heating the crucible 23 are densely distributed on an inner wall of the hearth, and the heating resistance wires 24 are spirally distributed on the inner wall of the hearth. The lateral wall of melting furnace 2 runs through has exhaust tube 5 and intake pipe 6, and exhaust tube 5 and intake pipe 6 and the interior crucible 23 of furnace communicate each other, installs air extraction stop valve 52 on the exhaust tube 5, and the end-to-end connection of exhaust tube 5 has the vacuum aspiration pump 51 that is used for extracting the interior air of furnace. An air inlet stop valve 62 is installed on the air inlet pipe 6, the tail end of the air inlet pipe 6 is connected with a high-pressure air tank 61 used for blowing air into the hearth, and argon is contained in the high-pressure air tank 61.

As shown in fig. 2, the top of the melting furnace 2 is provided with a furnace cover 7 for sealing the melting furnace 2, the bottom of the furnace cover 7 is provided with a sealing gasket, the furnace cover 7 is provided with a feeding mechanism for feeding materials into the melting furnace 2, the feeding mechanism comprises two storage hoppers 8 for containing aluminum alloy, the storage hoppers 8 run through the furnace cover 7, the lower ends of the storage hoppers 8 are connected with a hollow guide cylinder 81, the side wall of the guide cylinder 81 is provided with two opposite openings, the guide cylinder 81 is rotatably connected with a cylindrical cylinder 82 for taking materials, the outer wall of the cylindrical cylinder 82 is tightly attached to the inner wall of the guide cylinder 81, and the side wall of the cylindrical cylinder 82 is provided with a plurality of discharging grooves 83.

As shown in fig. 2, a driving mechanism for driving the cylindrical drum 82 to rotate is further mounted on the furnace cover 7, the driving mechanism includes a motor 71 mounted on the top of the furnace cover 7, an output shaft of the motor 71 penetrates through the furnace cover 7, and an output shaft of the motor 71 is coaxially connected with a first bevel gear 72, two sides of the first bevel gear 72 are respectively engaged with a second bevel gear 73, the second bevel gears 73 are coaxially connected with a rotating shaft 74, and the rotating shaft 74 axially penetrates through the material guiding drum 81 and is coaxially and fixedly connected with the cylindrical drum 82. The end of the output shaft of the motor 71 is connected to a stirring rod 9 via a coupling 91, and stirring blades 92 are densely distributed on the stirring rod 9.

As shown in fig. 1 and 3, a filter assembly is arranged in the purification furnace 3, the filter assembly comprises three layers of filter screens 33 which are sequentially distributed from top to bottom, the filter screens 33 are arranged below the pipe orifices of the first feeding pipes, the filter screens 33 are formed by casting high-temperature-resistant fibers, and the pore diameters of the filter screens 33 are gradually reduced from top to bottom. The outer wall of the heat preservation furnace 4 is wrapped with a multi-layer composite heat preservation layer which is composed of rock wool boards, steel wire mesh sandwich boards and polystyrene boards. The side wall of the holding furnace 4 is connected with a discharge pipe 41, and the tail end of the discharge pipe 41 is provided with a plugging head 42.

The specific implementation mode of the scheme is as follows: first, the furnace lid 7 is closed over the melting furnace 2 to seal the inside of the melting furnace 2. Then, the vacuum pump 51 and the suction stop valve 52 are opened, and the crucible 23 is evacuated by the vacuum pump 51 through the evacuation tube 5, so that the crucible 23 is brought into a state close to vacuum.

Cutting enough aluminum alloy solids into small pieces and pouring the small pieces into the storage hopper 8, simultaneously starting the motor 71, driving a second bevel gear 73 to rotate by an output shaft of the motor 71 through a first bevel gear 72, driving a cylindrical drum 82 to rotate through a rotating shaft 74, driving a discharging groove 83 on the cylindrical drum 82 to synchronously rotate in the rotating process of the cylindrical drum 82, and when the discharging groove 83 rotates under the storage hopper 8 and is communicated with the storage hopper 8, part of the aluminum alloy solids at the bottom of the storage hopper 8 fall into the discharging groove 83 under the self gravity of the aluminum alloy solids and fill the discharging groove 83; the discharging groove 83 filled with the solid aluminum alloy continues to rotate along with the cylindrical tube 82, and when the discharging groove 83 rotates to communicate with the opening below the guide cylinder 81, the solid aluminum alloy in the discharging groove 83 falls into the crucible 23 of the melting furnace 2 from the opening below the guide cylinder 81. The crucible 23 is heated by the heating resistance wire 24 on the inner wall of the hearth, so that the aluminum alloy solid in the crucible 23 is gradually in a molten state.

The cylinder 82 continuously adds the aluminum alloy solid in the storage hopper 8 into the crucible 23 of the melting furnace 2 through the feeding groove 83 in the rotating process, and the aluminum alloy solid is gradually melted into a molten state in the crucible 23; meanwhile, the output shaft of the motor 71 enables the stirring blade 92 to stir the molten aluminum alloy through the stirring rod 9, so that the molten aluminum alloy is heated more uniformly and is melted more fully.

When the aluminum alloy in the storage hopper 8 is completely added into the crucible 23 and the aluminum alloy solid is completely in a molten state, the high-pressure gas tank 61 and the gas inlet stop valve 62 are opened, so that the argon gas in the high-pressure gas tank 61 is filled into the crucible 23 through the gas inlet pipe 6, the pressure in the crucible 23 can be kept balanced with the external atmospheric pressure by the argon gas, and the argon gas cannot be oxidized with the molten aluminum alloy due to the stable chemical property of the argon gas.

Then, the first stop valve 22 on the first feeding pipe 21 and the second stop valve 32 on the second feeding pipe 31 are opened in sequence, the molten aluminum alloy in the melting furnace 2 flows into the purifying furnace 3 through the first feeding pipe 21, after three-layer filtering is carried out through the filter screen 33 in the purifying furnace 3, the impurities which are not molten and are doped in the aluminum alloy are filtered by the filter screen 33, and the filtered molten aluminum alloy flows into the holding furnace 4 through the second feeding pipe 31 for heat preservation.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. An aluminum alloy continuous melting furnace is characterized in that: comprises a tower frame (1), the tower frame (1) comprises an upper layer and a lower layer, a melting furnace (2) is placed on the upper layer of the tower frame (1), a purification furnace (3) and a heat preservation furnace (4) which are communicated with each other are sequentially placed on the lower layer of the tower frame (1), a crucible (23) is arranged in a hearth of the melting furnace (2), a furnace cover (7) used for sealing the melting furnace (2) is installed at the top of the melting furnace (2), a feeding mechanism used for feeding materials into the melting furnace (2) is arranged on the furnace cover (7), the feeding mechanism comprises two storage hoppers (8) used for containing aluminum alloy, the storage hoppers (8) penetrate through the furnace cover (7), the lower ends of the storage hoppers (8) are connected with hollow guide cylinders (81), two opposite openings are formed in the side walls of the guide cylinders (81), and cylindrical guide cylinders (82) used for taking materials are rotatably connected in the guide cylinders (81), the outer wall of the cylindrical barrel (82) is tightly attached to the inner wall of the material guide barrel (81), and a plurality of discharging grooves (83) are formed in the side wall of the cylindrical barrel (82); still install on bell (7) and be used for driving a cylinder (82) pivoted actuating mechanism, actuating mechanism is including installing motor (71) at bell (7) top, the output shaft of motor (71) runs through in bell (7), and the output shaft coaxial coupling of motor (71) has first bevel gear (72), first bevel gear (72) both sides have engaged with second bevel gear (73) respectively, second bevel gear (73) coaxial coupling has axis of rotation (74), axis of rotation (74) axial run through in guide cylinder (81) and with a cylinder (82) coaxial fixed connection.

2. The aluminum alloy continuous melting furnace according to claim 1, wherein: a first feeding pipe (21) is connected between the melting furnace (2) and the purifying furnace (3), a first stop valve (22) is installed on the first feeding pipe (21), a second feeding pipe (31) is connected between the purifying furnace (3) and the heat preserving furnace (4), and a second stop valve (32) is installed on the second feeding pipe (31); the outer walls of the first feeding pipe (21) and the second feeding pipe (31) are coated with heat insulation cotton.

3. The aluminum alloy continuous melting furnace according to claim 1, wherein: the side wall of the melting furnace (2) penetrates through an air exhaust pipe (5), an air exhaust stop valve (52) is installed on the air exhaust pipe (5), and the tail end of the air exhaust pipe (5) is connected with a vacuum air exhaust pump (51) used for extracting air in a hearth.

4. A continuous melting furnace for aluminum alloy according to claim 3, wherein: the lateral wall of melting furnace (2) runs through has intake pipe (6), install intake stop valve (62) on intake pipe (6), the end-to-end connection of intake pipe (6) has high-pressure gas jar (61) that are used for to the furnace internal blowing, and has accommodated inert gas in high-pressure gas jar (61).

5. The aluminum alloy continuous melting furnace according to claim 1, wherein: heating resistance wires (24) used for heating the crucible (23) are densely distributed on the inner wall of the hearth, and the heating resistance wires (24) are distributed on the inner wall of the hearth in a spiral shape.

6. The aluminum alloy continuous melting furnace according to claim 1, wherein: the stirring device is characterized in that a stirring assembly for stirring molten metal is mounted on an output shaft of the motor (71), the stirring assembly comprises a stirring rod (9) coaxially connected to the output shaft of the motor (71), and stirring blades (92) are densely distributed on the stirring rod (9).

7. The aluminum alloy continuous melting furnace according to claim 1, wherein: be equipped with filter assembly in purification stove (3), filter assembly includes filter screen (33) that at least three-layer from top to bottom distributes in proper order, and the aperture of filter screen (33) from top to bottom reduces gradually.

8. The aluminum alloy continuous melting furnace according to claim 1, wherein: the outer wall of the heat preservation furnace (4) is wrapped with a multi-layer composite heat preservation layer, and the heat preservation layer is composed of rock wool boards, steel wire mesh sandwich boards and polystyrene boards.