TW201518007A - Heating apparatus for molten metal container - Google Patents

Abstract

A molten metal container has a cover which can tilt by a predetermined angle around a rotation axis. The cover is provided with a regenerative burner unit having a pair of supply and discharge nozzles. The pair of supply and discharge nozzles connects to a pair of ducts. The pair of ducts comprises a first duct disposed on the cover and a second duct having a regenerative chamber. The first duct has a first end connecting to the supply and discharge nozzle and a second end coaxial with the rotation axis. The second duct has a first end coaxially facing the second end of the first duct g and a second end connecting to the regenerative chamber. A seal portion is interposed in the facing portion between the second end of the first duct and the first end of the second duct. The regenerative chamber is disposed on a position unrelated to opening and closing the cover.

Description

Heating device for molten metal container Field of invention

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a heating apparatus for a molten metal container which can heat the internal air of a molten metal container such as a ladder, a tundish or the like.

Background of the invention

As an example of a heating device for a molten metal container, Patent Document 1 discloses a heating device for a molten iron pan which is provided with a plugged iron in a tip end of a tilting arm centered on a support shaft of a frame and tilted at a predetermined angle toward the front end portion. A cover that is open above the pot and a regenerative burner at the center of the lid. The regenerative burner of Patent Document 1 stores the metal heat storage body in the burner body so that the heat storage body is not damaged by the impact generated when the cover is operated by the switch.

Patent Document 2 discloses a feed tank preheating apparatus which stabilizes a rotating spherical heat storage member at a predetermined angle of rest due to its own weight even if the feed tank is tilted during slag-off, whereby The spherical heat accumulating member can be prevented from falling from the regenerator.

Patent Document 3 discloses a degassing pipe device for a molten metal, in which a rotating shaft connects a buckling pipe that is connected to a plurality of parallel rotary joints to be flexibly stretched, and the buckling pipe is connected to a fixed pipe for a vacuum pipe. The front end portion is connected to a vacuum cover provided on the upper surface of the bucket. The rotary joint is configured to flex and expand and contract the connected buckling pipe in a predetermined direction, whereby the piping device can correspond to the action of the bucket in the front-rear direction and the lifting direction.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2000-102857

[Patent Document 2] Japanese Patent Laid-Open No. Hei 10-047491

[Patent Document 3] Japanese Unexamined Publication No. SHO 62-023850

Summary of invention

Patent Document 1 disposes a regenerative burner, a heat storage body, and a duct that switches the direction in which the combustion air and the combustion exhaust body flow, and arranges them on the cover. However, these are heavy objects, and as a result of the increase in the weight of the entire cover, a switching mechanism having a large power is required. In addition to this, it is necessary to reinforce the cover with the rib for preventing deformation, or to provide a balance weight for ensuring the weight balance of the cover, and there is a problem that the entire device is enlarged.

In Patent Document 1, when the heat storage body is configured by a plurality of spherical heat storage members, there is a doubt that the heat storage member falls from the heat storage chamber when the cover is opened and closed. consider. This problem can be prevented by applying the technique of Patent Document 2. However, when the cover is returned from the open state to the closed state, the upper surface of the heat storage body in the regenerator is not necessarily flat, and there is a new problem that the flow of combustion air passing through the regenerator or the flow of the combustion exhaust body is shifted.

On the other hand, in Patent Document 3, a rotary joint is provided at a plurality of fixed tubes and a displacement accompanying a switching operation of the cover is absorbed. However, in the conduit of the regenerative burner, the outer peripheral surface or the inner peripheral surface is refractory and heat-insulated. Since the structure is such that even if a rotary joint is provided at a plurality of portions of the duct, it is difficult to absorb the displacement of the switch operation accompanying the tilted cover.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a heating apparatus for a molten metal container which is tilted by a predetermined angle around a rotating shaft and which suppresses an increase in weight of an open upper and a closed lid of a molten metal container, and can suppress a cover The falling of the heat storage member generated during the switching operation or the biasing of the gas fluid passing through the regenerator can sufficiently absorb the displacement accompanying the switching operation of the tilted cover.

The heating device of the molten metal container of the present invention has: a molten metal container having an upper opening; and a switching mechanism for tilting a predetermined angle around the rotating shaft supported by the bearing to rotate freely and opening and sealing the upper opening And a fuel injection nozzle having a pair of supply and exhaust nozzles and a fuel injected into the molten metal container, wherein the supply and exhaust nozzles respectively have one end opening in the molten metal container, and another Opening at one end of the molten metal container, and passing the supply of combustion air to the exhaust of the combustion exhaust body through the heat storage body; Further, the pair of supply and exhaust nozzles are connected to a pair of conduits having a regenerator that houses the regenerator, and a portion of the pair of conduits in which the regenerator is formed is disposed at a predetermined position different from the cover.

According to this configuration, in the duct, since the large weight portion in which the regenerator is formed is disposed at a predetermined position (a position irrespective of the switch of the cover) different from the cover, the weight of the cover can be suppressed from increasing. As a result, the switch mechanism having a large power is not required, and the size of the entire device can be suppressed. Moreover, it is possible to prevent the heat storage member from falling from the regenerator when the tilting cover is opened, and the upper surface of the regenerator is not flat when the cover is returned from the open state to the closed state, and the combustion air passing through the regenerator, or It is a problem of burning the exhaust body bias current.

Further, it is preferable that each of the pair of ducts is configured by a first duct disposed on the cover and a second duct having the regenerator, wherein the first duct is connected to the air supply and exhaust nozzle. The second end is coaxial with the rotating shaft, and the second end of the second duct is coaxially opposed to the second end of the first duct, and the second end is coupled to the regenerator and is in the first duct. The opposing portion of the second end and the first end of the second conduit allows the sealing portion to exist.

According to this configuration, even if the duct having the heat insulating material is formed on the outer peripheral surface or the inner peripheral surface, the displacement accompanying the switching operation of the cover can be sufficiently absorbed by the simple configuration, and thus the damage of the duct can be prevented. Further, since the sealing portion is interposed between the second end of the first duct and the first end of the second duct, it is possible to prevent the gas flowing through the first duct and the second duct from leaking to the outside.

Preferably, the second duct is configured to be movable in the axial direction with respect to the first duct. Further, the opposing portion is provided in the first conduit The flange is formed by a pair of flanges on the outer peripheral edge portion of the second duct, and the seal portion is provided on at least one of the flange faces of the pair of flanges.

According to these configurations, when the bucket preheating device is operated, the second duct is moved toward the first duct side, and the pair of flanges are brought close to each other, and the seal portion existing in the opposite portion is attached, thereby preventing The gas flowing through the first and second conduits leaks to the outside. On the other hand, when the lid is opened and closed, the second conduit is moved away from the first conduit, and the sealing portion that is present in the opposing portion is released, thereby preventing the lid from being opened and closed. The sealing portion and the end faces of the first and second conduits are damaged.

The sealing portion is formed of an annular inner gasket and an outer gasket formed of an elastic material, and further includes: an end surface facing the inner gasket and the outer gasket and the other flange surface The air supply means for supplying the gas in the annular space, and the pressure of the gas supplied from the air supply means is taken as P1, and when the internal pressure of the duct is used as the P2 when the combustion air is circulated in the duct The relationship between the two is P1>P2.

According to this configuration, even if the axial center of the first duct is offset from the axial center of the second duct, a gap is generated between the pair of flanges, and the combustion air is preheated by the heat exchange with the heat storage body. In the first and second conduits, the pressure of the gas supplied from the air supply mechanism to the annular space is set to be higher than the pressure in the first and second conduits, so that the high-temperature combustion air can be prevented from passing through the gap. Leaked out to the outside. On the other hand, when the high-temperature combustion exhaust gas in the bucket attracts the exhaust gas through the first and second ducts, the first and second ducts become negative pressure, so that the air supply mechanism is directed toward the annular space. for Since the flushing air is sucked into the first and second ducts, it is possible to prevent the high-temperature combustion exhaust body from leaking to the outside through the gap.

According to the present invention, it is possible to provide a heating apparatus for a molten metal container which is tilted by a predetermined angle around a rotating shaft and which suppresses an increase in the weight of the upper opening and the closed lid of the molten metal container, and can suppress the opening and closing of the cover. The heat storage member generated during the operation is dropped or the gas flow passing through the regenerator is biased, and the displacement accompanying the switching operation by the tilted cover can be sufficiently absorbed.

1‧‧‧Powder preheating device

10‧‧‧ openings

12‧‧‧Pour bucket

14‧‧‧ Cover

16‧‧‧Regenerative burner installation

20a, 20b‧‧‧ tilting arms

22‧‧‧Rotary axis

24a, 24b‧‧‧ bearing

30a, 30b‧‧‧ catheter

31‧‧‧fuel supply pipe

32a, 32b‧‧‧ regenerators

34a, 34b‧‧‧1st catheter

35a, 35b‧‧‧2nd catheter

38a, 38b‧‧‧ opposites

40a, 40b‧‧‧ Sealing Department

41a, 41b‧‧‧ inside packing retaining section

42a, 42b‧‧‧Outer packing retaining section

44a, 44b‧‧‧ base plate

45a, 45b‧‧‧ inside filler (inside gasket)

46a, 46b‧‧‧Outer packing (outer gasket)

48a, 48b‧‧‧ annulus

50a, 50b‧‧‧Trolley

52a, 52b‧‧‧ wheels

60‧‧‧Spiral axis

62‧‧‧ nuts

64‧‧‧With brake motor

66‧‧‧Electric cylinder

70a, 70b‧‧‧ hollow water jacket

72‧‧‧ ribs

74a, 70b‧‧‧ base

75a, 75b‧‧‧ cylindrical members

76a, 76b‧‧‧ bracket

77a, 77b~78a, 78b‧‧‧ annular protrusion

80a, 80b‧‧‧ hollow water jacket

82a, 82b‧‧‧ ribs

90a, 90b‧‧‧ air supply tube

160‧‧‧burner body

162a, 162b, 163a, 163b‧‧

164a, 164b‧‧‧ exhaust nozzle

166‧‧‧fuel injection nozzle

200‧‧‧ Ground

202‧‧‧ 台台

204a, 204b‧‧‧ track

300‧‧‧Insulation

302‧‧‧ castable refractory layer

304‧‧‧Insulation

340a, 340b‧‧‧1st flexion

342a, 342b‧‧‧ first opening

344a, 344b‧‧‧1st flange

352a, 352b‧‧‧ second opening

353a, 353b‧‧‧2nd flexion

354a, 354b‧‧‧2nd flange

P1, P2‧‧‧ pressure

Fig. 1 is a side view showing a heating device for a molten metal container according to an embodiment of the present invention.

Fig. 2 is a plan view showing a heating device for a molten metal container according to an embodiment of the present invention.

Fig. 3 is a rear side view (partial cross section) of the heating device of the molten metal container viewed from the direction of B-B of Fig. 2;

Fig. 4 is a side cross-sectional view of the regenerative burner device as seen from the C-C direction of Fig. 2 .

Fig. 5 is a view showing the operation of the bucket preheating device, and showing that the second duct is moved toward the first duct side, and the first flange and the second flange are brought close to each other and attached to the opposite portion. A diagram of the state of the seal.

6 is a view showing a state in which the lid switch is operated, and the second duct is moved in a direction in which the second duct is separated from the first duct, and the state in which the seal portion existing in the opposing portion is released is displayed.

Hereinafter, the heating device for the molten metal container according to the embodiment of the present invention will be described with reference to the additional drawings. However, in the following description, it is cheaper to use the term of direction or position (for example, "one end" or "the other end", etc.), but these are easy to understand the invention and are not limited by the meaning of these terms. The technical scope of the present invention. In addition, the following description is merely an exemplification of one aspect of the present invention, and is not intended to limit the present invention, its application, or its use.

In the present embodiment, a bucket preheating device which is an example of a heating device for a molten metal container will be described. In general, the bucket that receives the molten steel from the converter and is transported to the continuous casting zone is preheated by a heating mechanism such as a burner before the steel is received for the purpose of drying or compensating for the temperature drop of the molten steel after the steel is received.

As shown in Fig. 1 and Fig. 2, the bucket preheating apparatus 1 has a metal bucket 12 having an opening 10 of a molten metal injection port at the upper portion, and an opening portion for plugging the upper portion of the bucket 12 A sealed lid 14 and a regenerative burner device 16 which is provided on the lid 14 and which performs drying and preheating in the bucket 12.

The bucket 12 is formed inside the iron sheet, for example, by lining the refractory heat insulating material of aluminum or tantalum carbide.

The lid 14 has a structure in which the refractory is lined on the underside of the metal sheet of the substrate. The upper surface of the cover 14 is provided with a pair of inclined arms 20a, 20b extending from the body of the cover 14. As shown in Fig. 1 and Fig. 2, the inclined arms 20a, 20b are centered on the rotating shaft 22 and the front end portion is supported to be tilted by a predetermined angle (for example, 0 to 90). As shown As shown, both ends of the rotating shaft 22 are supported by a pair of bearings 24a, 24b disposed on the gantry 202 of the floor 200.

On the other hand, drive mechanisms such as an electric cylinder or a hydraulic cylinder (not shown) are connected to the end sides of the tilt arms 20a and 20b. Thereby, the cover 14 is inclined within a predetermined angle range (within the direction of the arrow direction), and is configured to open and open the opening portion 10 of the bucket 12.

A regenerative burner device 16 is provided at the central portion of the cover 14. As shown in FIG. 4, the regenerative burner device 16 has a burner body 160 composed of a well-known refractory, and one end of which is inside the bucket 12, and the other end has openings 162a, 162b outside the bucket 12, respectively. Openings 163a and 163b, and a pair of supply and exhaust nozzles 164a and 164b that are supplied to the exhaust and exhaust nozzles 164a and 164b by the supply of the combustion air and the exhaust of the combustion exhaust body through the heat storage body. A fuel injection nozzle 166 that ejects fuel between the buckets 12 is formed. A pair of ducts 30a and 30b are connected to the other end side of the air supply and exhaust nozzles 164a and 164b, and a fuel supply pipe 31 is connected to the other end side of the fuel injection nozzle 166.

As shown in Fig. 1 and Fig. 2, the ducts 30a and 30b are connected to a pair of regenerators 32a and 32b that communicate with the ducts 30a and 30b. The regenerators 32a and 32b accommodate a plurality of spherical heat accumulating members constituting the heat storage bodies. The regenerators 32a and 32b are disposed on the floor 200. This will be described in detail later.

Returning to Fig. 1, the side faces of the ducts 30a, 30b are formed in an inverted U shape. Further, the inside of the ducts 30a and 30b is made of a refractory material, and is composed of a heat insulating layer 300 of the heat insulating board and a two-layer structure of the castable refractory layer 302 (see FIGS. 3, 5, and 6).

As shown in FIGS. 1 to 3, the ducts 30a and 30b are constituted by first ducts 34a and 34b disposed on the cover 14, and second ducts 35a and 35b having regenerators 32a and 32b.

The first ducts 34a and 34b have first bent portions 340a and 340b that are bent in a slightly L shape on the side of the heat storage chambers 32a and 32b. As shown in the figure, the side faces of the first bent portions 340a and 340b facing the opposite corner portions are coupled to both end faces of the rotary shaft 22.

The first flexures 340a and 340b are provided with first openings 342a and 342b (second ends) coaxial with the rotation shaft 22. Further, the first flanges 344a and 344b are attached to the outer peripheral edge portions of the first openings 342a and 342b. Thereby, the first ducts 34a and 34b are inclined in conjunction with the rotation of the rotary shaft 22 and within the predetermined angle with the cover 14.

The second ducts 35a and 35b have second openings 352a and 352b (first end) that are coaxial with the rotating shaft 22 and that face the first openings 342a and 342b, and have a slightly L-shaped shape from the heat accumulating chamber 32a. The second flexures 353a and 353b connected to 32b. The second flanges 354a and 354b having substantially the same outer diameter as the first flanges 344a and 344b are attached to the outer peripheral edge portions of the second openings 352a and 352b.

The seal portions 40a and 40b include opposing portions 38a and 38b existing in the first flanges 344a and 344b and the second flanges 354a and 354b. The detailed configuration of the sealing portions 40a and 40b will be described in detail later.

As shown in Fig. 3, in the bucket preheating apparatus 1 of the present embodiment, the heat storage chambers 32a and 32b, which are heavy objects, are placed at different predetermined positions from the cover 14. In detail, the regenerators 32a, 32b are placed on the carriages 50a, 50b, and the trolley can be moved back and forth to be laid with a certain gap with respect to the axis of the rotating shaft 22. On one of the tracks 204a, 204b on the ground 200.

The carriages 50a, 50b have two pairs of wheels 52a, 52b that are free to rotate. Further, the carriages 50a and 50b are coupled to an electric cylinder 66 including a screw axis 60, a nut 62, and an attachment motor 64 provided in the gantry 202, and the motor 64 is rotated or reversely rotated by an operation switch (not shown). Thereby, the trolleys 50a, 50b can be moved back and forth on the rails 204a, 204b, and the trolleys 50a, 50b can also be positioned at desired locations.

Specifically, when the bucket preheating device 1 is operated, as shown in FIG. 5, the electric cylinder 66 is driven to move the carriages 50a and 50b toward the first duct 34b (34a) side, and the first flange 344b (344a) is attached. The refrigerating burner device 16 is combusted in proximity to the second flange 354b (354a) and attached to the sealing portion 40b (40a) present in the opposing portion 38b (38a).

The combustion of the regenerative burner unit 16 is performed as follows. The combustion air supplied from a combustion air supply source (not shown) is supplied to the regenerator 32a stored in the previous step, for example, and then preheated by heat exchange with the regenerator of the regenerator 32a, and is transmitted through the duct 30a. It is introduced to the supply and exhaust nozzle 164a.

Further, the fuel supplied from the fuel supply pipe 31 to the fuel discharge nozzle 166 and the preheated high-temperature combustion air are mixed in the vicinity of the burner body 160 in the bucket 12, from a fuel supply source (not shown). The ignition is performed by an ignition source such as a pilot (not shown), and the high-temperature combustion flame is formed toward the inside of the bucket 12.

Further, the high-temperature combustion exhaust gas in the bucket 12 is driven by the exhaust body suction fan (not shown), and is sucked to the conduit through the supply and exhaust nozzle 164b. In the 30b, the heat storage chamber 32b that has been cooled by the heat exchange with the combustion air in the previous step is exchanged with the regenerator of the regenerator 32b and cooled to 100 ° C to 150 ° C. The trachea is emitted towards the atmosphere. Thereafter, the operation of sequentially switching the supply of the combustion air and the exhaust of the combustion exhaust body between the supply and exhaust nozzles 164a and 164b for each predetermined time continues for a predetermined period of time.

On the other hand, as shown in Fig. 6, when the cover 14 is operated and closed (when the combustion of the regenerative burner unit 16 is stopped), the electric cylinder 66 is driven to move the second duct 35b (35a) from the first duct 34b ( 34a) The carriages 50a, 50b are moved in the direction of the separation, and the attachment of the seal portion 40b (40a) existing in the opposite portion 38b (38a) is released.

In the bucket preheating apparatus 1 of the present embodiment configured as described above, the first ducts 34a and 34b are tilted about the rotation shaft 22 with respect to the second ducts 35a and 35b on the fixed side during the opening and closing operation of the cover 14. Therefore, when the entire ducts 30a and 30b are not damaged, the displacement accompanying the opening and closing operation of the cover 14 can be sufficiently absorbed.

Further, since the regenerators 32a and 32b on the distal end sides of the second ducts 35a and 35b are placed at positions not related to the switch of the cover 14, the increase in weight of the cover 14 can be suppressed. As a result, the switch mechanism having a large power is not required, and the size of the entire device can be suppressed. In addition, it is possible to prevent the heat storage member from falling from the regenerators 32a, 32b during the opening operation of the cover 14, and the unevenness of the heat storage body when the cover 14 is returned from the open state to the closed state, and the heat storage is performed by the heat storage. The combustion air of the chambers 32a, 32b or the problem of the flow of the combustion exhaust body is biased.

Further, the second ducts 35a and 35b are brought close to the axial direction with respect to the first ducts 34a and 34b, and are configured to be disengageable. Further, the first flanges 344a and 344b and the second flanges 354a and 354b are provided on the outer peripheral edge portions of the first ducts 34a and 34b and the second ducts 35a and 35b, and the opposing portions 38a and 38b are sealed. The portions 40a, 40b are present.

Therefore, when the bucket preheating device 1 is operated, the carriages 50a and 50b are moved toward the first ducts 34a and 34b, and the first flanges 344a and 344b are brought close to the second flanges 354a and 354b, and the attachment is present. The sealing portions 40a and 40b of the opposing portions 38a and 38b prevent the gas flowing through the first and second conduits 34a, 34b, 35a, and 35b from leaking to the outside.

On the other hand, when the lid 14 is opened and closed, the carriages 50a and 50b are moved in the direction in which the second ducts 35a and 35b are separated from the first ducts 34a and 34b, and the opposite portions 38a and 38b are removed. The sealing portions 40a and 40b are attached to prevent the end faces of the sealing portions 40a and 40b and the first and second conduits 34a, 34b, 35a and 35b from being damaged when the cover 14 is opened and closed.

Next, the detailed structure of the sealing portions 40a and 40b will be described. As shown in Fig. 5 and Fig. 6, the second flange 354b (354a) of the first flange 344b (344a) faces the surface of the first flange 344b (344a), and is connected to the base plate 44b (44a) to have an annular shape and a U-shaped cross section. The inner packing holding portion 41b (41a) and the outer packing holding portion 42b (42a).

A hollow water jacket 70b (70a) is formed on the outer surface of the root portion of the first flange 344b (344a) and on the outer periphery of the first duct 34b (34a). A plurality of ribs 72b (72a) are disposed on the back surface of the first flange 344b (344a) and the upper surface of the water-cooling jacket 70b (70a) at equal intervals in the circumferential direction.

As shown in the figure, each of the inner filler holding portion 41b (41a) and the outer filler holding portion 42b (42a) holds an inner packing (inner gasket) 45b (45a) having an annular shape and an angular cross section, and an outer packing. (Outer spacer) 46b (46a). The inner packing 45b (45a) and the outer packing 46b (46a) are made of an elastic material having heat resistance.

The material of the inner filler 45b (45a) and the outer filler 46b (46a) is preferably a silicone which is excellent in heat resistance and temperature change stability. Specifically, the inner filler 45b (45a) and the outer filler 46b (46a) are formed by coating the outer side of the sponge member of the foamed silicone with a silicone rubber.

As shown in the figure, the bracket 76b (76a) to which the tubular member 75b (75a) is fixed and fixed is attached to the upper end of the base portion 74b (74a) having a reverse L-shaped cross section. The second flange 354b (354a) is attached to the end of the cylindrical member 75b (75a) on the side opposite to the first flange 344b (344a).

A pair of annular projections 77b are formed at a position facing the first flange 344b (344a) of the second flange 354b (354a) and facing the inner filler 45b (45a) and the outer filler 46b (46a). 77a), 78b (78a).

The annular projections 77b (77a) and 78b (78a) are in contact with the inner and outer fillers 45b (45a) and 46b (46a) when the second conduit 35b (35a) is brought close to the first conduit 34b (34a). The inner and outer fillers 45b (45a) and 46b (46a) are members that are elastically deformed (compressed).

A heat insulating material 304 that blocks heat from the inside of the duct is attached to the inner peripheral surface of the tubular member 75b (75a). Further, a hollow water jacket 80b (80a) is formed on the outer peripheral surface of the tubular member 75b (75a). Similarly to the first flange 344b (344a), the back surface of the second flange 354b (354a) is fixedly adhered to the upper surface of the water-cooling jacket 80b (80a). A plurality of ribs 82b (82a) arranged at equal intervals in the circumferential direction are provided.

As shown in Fig. 5, when the first flange 344b (344a) and the second flange 354b (354a) are brought close to each other and the sealing portion 40b (40a) existing in the opposing portion 38b (38a) is interposed, An annular space 48b (48a) is formed. As shown in the figure, a gas supply pipe for feeding flushing air (gas) into the annular space 48b (48a) is provided at a position facing the annular space 48b (48a) of the second flange 354b (354a). 90b (90a).

When the positional relationship between the first duct 34b (34a) and the second duct 35b (35a) is in the state of FIG. 5 (that is, when the bucket preheating apparatus 1 is operated), the air supply duct 90b (90a) faces the annular space 48b ( 48a) Flushing air is often sent.

At this time, the pressure of the flushing air sent from the air supply pipe 90b (90a) to the annular space 48b (48a) is taken as P1, and the first and second conduits 34b (34a) and 35b (35a) through which the gas flows are used. When the pressure inside is taken as P2, the relationship between the two should be set to P1>P2.

With the above configuration, it is assumed that the axial center of the first duct 34b (34a) is offset from the axial center of the second duct 35b (35a), even at the first and second flanges 344b (344a) and 354b (354a). When there is a gap between the two, since the relationship between P1 and P2 is set to P1 > P2, the heat exchange with the heat storage bodies flowing through the first and second conduits 34b (34a) and 35b (35a) is used. The combustion air at a high temperature of heat does not leak to the outside through the gap.

On the other hand, when the high-temperature combustion exhaust gas in the bucket 12 is sucked by the first and second conduits 34b (34a) and 35b (35a), the first and second conduits 34b (34a) and 35b (35a) The inside is a negative pressure, so the flushing air sent from the air supply pipe 90b (90a) to the annular space 48b (48a) is attracted to the air. 1. In the second ducts 34b (34a) and 35b (35a), the high-temperature combustion exhaust gas does not leak to the outside through the gap.

In the present embodiment, the example in which the inner fillers 45a and 45b and the outer fillers 46a and 46b constituting the sealing portions 40a and 40b are provided on the surfaces of the first flanges 344a and 344b has been described. However, the present invention is not limited thereto, and the inner side may be provided. The fillers 45a and 45b and the outer fillers 46a and 46b are provided on the surfaces of the second flanges 354a and 354b. Further, an example in which the air supply pipes 90a and 90b are attached to the second flanges 354a and 354b has been described. However, the present invention is not limited thereto, and the air supply pipes 90a and 90b may be attached to the first flanges 344a and 344b and to the annular space 48a. 48b feeds the flushing air.

[Industrial availability]

The heating device of the molten metal container of the present invention can be applied as a preheating device for the preheating of the molten steel from the bucket to the feeding tank of the casting mold, in addition to the bucket preheating device described in the embodiment. Device.

1‧‧‧Powder preheating device

20a, 20b‧‧‧ tilting arms

22‧‧‧Rotary axis

24a, 24b‧‧‧ bearing

30a, 30b‧‧‧ catheter

32a, 32b‧‧‧ regenerators

34a, 34b‧‧‧1st catheter

35a, 35b‧‧‧2nd catheter

38a, 38b‧‧‧ opposites

40a, 40b‧‧‧ Sealing Department

50a, 50b‧‧‧Trolley

52a, 52b‧‧‧ wheels

60‧‧‧Spiral axis

62‧‧‧ nuts

64‧‧‧With brake motor

66‧‧‧Electric cylinder

200‧‧‧ Ground

202‧‧‧ 台台

204a, 204b‧‧‧ track

300‧‧‧Insulation

302‧‧‧ castable refractory layer

340a, 340b‧‧‧1st flexion

342a, 342b‧‧‧ first opening

344a, 344b‧‧‧1st flange

352a, 352b‧‧‧ second opening

353a, 353b‧‧‧2nd flexion

354a, 354b‧‧‧2nd flange

Claims (6)

A heating device for a molten metal container, comprising: a molten metal container having an upper opening; and a switching mechanism for tilting a predetermined angle centering on a rotating shaft supported by the bearing to rotate freely and opening the upper opening a sealed cover; and a fuel injection nozzle having a pair of supply and exhaust nozzles and a fuel injected into the molten metal container, wherein the supply and exhaust nozzles respectively have one end opening in the molten metal container The other end is open to the outside of the molten metal container, and the supply of combustion air is exchanged with the exhaust of the combustion exhaust body through the heat storage body; and the pair of supply and exhaust nozzles are connected to receive the heat storage. A pair of conduits in the regenerator of the body, and a portion of the pair of conduits in which the regenerator is formed is disposed at a predetermined position different from the cover. The heating device of the molten metal container according to claim 1, wherein the pair of conduits are respectively constituted by a first conduit disposed on the cover and a second conduit having the heat storage chamber, wherein the first conduit is One end is connected to the air supply and exhaust nozzle, the second end is coaxial with the rotating shaft, and the second end of the second duct is coaxially opposed to the second end of the first duct, and the second end is connected to the heat storage. The chamber is connected to the second end of the first conduit and the first end of the second conduit The opposite portion allows the seal to exist. The heating device of the molten metal container according to claim 2, wherein the second conduit is configured to be accessible to the first conduit and to be apart from the axial direction. The heating device of the molten metal container according to claim 2 or claim 3, wherein the opposing portion is configured by a pair of flanges provided on a peripheral portion of the first conduit and the second conduit, and further The sealing portion is provided on a flange surface of at least one of the pair of flanges. The heating device of the molten metal container of claim 2 or claim 3, wherein the sealing portion is formed by an annular inner gasket and an outer gasket formed of an elastic material, and further comprising: facing the inner side cushion a gas supply mechanism for supplying a gas to the annular space formed by the one end surface of the outer gasket and the other flange surface, and the pressure of the gas supplied from the air supply means as P1 for the combustion When the internal pressure of the duct when the air circulates in the duct is regarded as P2, the relationship between the two is P1>P2. The heating device of the molten metal container of claim 4, wherein the sealing portion is formed by an annular inner gasket and an outer gasket formed of an elastic material, and further comprising: the inner gasket and the outer side a gas supply mechanism for supplying gas to an annular space formed by one end surface of the gasket and the other flange surface, and the pressure of the gas supplied from the air supply mechanism is regarded as P1, when the internal pressure of the duct when the combustion air is circulated in the duct is regarded as P2, the relationship between the two is P1>P2.