Patent Application
20190160526
The present invention relates to an industrial equipment having a function of cooling a molten material such as a metal.
Priority is claimed on Japanese Patent Application No. 2017-231002, filed Nov. 30, 2017, the content of which is incorporated herein by reference.
In factory equipment or the like for processing a metal, an operation of cooling a high-temperature molten metal by exposing the molten metal to the atmosphere or by dipping the molten metal in a coolant stored in a cavity is performed. For example, a technique for accelerating diffusion of the molten material in water and enhancing a cooling effect is disclosed in Japanese Unexamined Patent Application, First Publication No. 2010-266286.
When a high-temperature molten material is dropped into a cavity or the like in which a coolant is stored, since the molten material freely spreads on a floor surface, the range of contact with the coolant is enlarged, and a rough mixing (atomization of the molten material) phenomenon is promoted. As a result, in some cases, rapid boiling may occur, and countermeasures to prevent this are required.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide industrial equipment capable of preventing the rough mixing phenomenon from being accelerated when a high-temperature molten metal is cooled, and capable of suppressing the rapid boiling of water.
(1) According to an aspect of the present invention, an industrial equipment including: a cavity configured to store a coolant; and a cooling acceleration device which is accommodated in the cavity and is put in the coolant stored in the cavity, wherein the cooling acceleration device includes: a passage formation portion in which a tubular passage extending in a horizontal direction is formed; and an introduction portion configured to introduce molten material dropped into the cavity to the passage formation portion.
(2) In the industrial equipment described above, the industrial equipment further includes a vessel configured to drop drops of molten material, wherein the cavity is positioned below the vessel, the cooling acceleration device is accommodated in the cavity and is below the vessel, and the molten material dropped from the vessel into the cavity is introduced to the passage formation portion via the introduction portion.
(3) In the industrial equipment described above, a cross-sectional area of the passage formation portion, is perpendicular to a bottom surface of the passage formation portion, may be 2000 mm2 or more and 20000 mm2 or less.
(4) In the industrial equipment described above, in a cross section of the passage formation portion perpendicular to an extending direction thereof, a horizontal length of the cross section may be 1 to 200 times a vertical length of the cross section.
(5) In the industrial equipment described above, the introduction portion may be a through hole formed in a side wall of the passage formation portion facing the vessel.
(6) In the industrial equipment described above, a plurality of the through holes may be formed so as to be aligned in the extending direction of the passage formation portion.
(7) In the industrial equipment described above, a plurality of passage formation portions may be installed in the industrial equipment so as to be aligned side by side in a width direction thereof.
(8) In the industrial equipment described above, the plurality of passage formation portions may be stacked in the vertical direction.
(9) In the industrial equipment described above, a ceiling portion of the passage formation portion may be provided with a plurality of protrusions formed inside the passage formation portion.
(10) In the industrial equipment described above, a floor portion of the passage formation portion may be provided with a protrusion formed inside the passage formation portion.
(11) In the industrial equipment described above, a covering member may be installed on a top of the passage formation portion existing at the highest position in the vertical direction.
(12) In the industrial equipment described above, a protruding portion may be formed on a top of the passage formation portion existing at the highest position in the vertical direction.
As described above, the industrial equipment according to the present invention is configured so that the molten material is dropped into a tubular passage storing the coolant. After the molten material is dropped, a space surrounded by the side walls of the passage is in a state in which the molten material accumulates on the lower area of the space, and water accumulates on the upper area of the space. In this case, since the diffusion of the molten material in the horizontal direction is restricted, a contact area of the molten material with the water is smaller than in a case where the same amount of the molten material is not accommodated in the passage and spreads to diffuse on the floor surface. Therefore, it is possible to reduce the ratio of one portion of the molten material, which is coming into contact with the water and roughly mixing therewith, with respect to the other portion of the molten material accommodated in the passage, and thereby rapid boiling of the water can be suppressed.
In addition, in the industrial equipment according to the present invention, since the molten material is accommodated in the narrow space in the passage, heat of the molten material is held in the passage, and the temperature of the water stored in the same space rapidly rises. Therefore, the interior of the passage is in a vapor-rich state, and generation of new steam which is a cause of shock wave generation does not easily occur, and as a result, rapid boiling of the water can be further suppressed.
Hereinafter, industrial equipment according to an embodiment to which the present invention is applied will be described in detail with reference to the drawings. In the drawings used in the following description, for the sake of easy understanding of the features, there are cases where characteristic portions are illustrated to be enlarged for convenience, and the dimensional ratio of each component is not necessarily the same as the actual ratio. Further, the materials, dimensions, and the like exemplified in the following description are examples, but the present invention is not limited thereto, and can be carried out with appropriate changes within a scope that does not change the gist thereof.
The vessel 101 is configured so that the molten material M stored in the cavity 102 can be dropped to the outside therefrom. Although a shape of the vessel 101 is not limited, a hole 101a through which the dropped molten material M passes is formed at a position which is a bottom portion. The position of the hole 101a is not limited either, but from the viewpoint of preventing the local residue of the molten material M, the position is preferably the lowest point of the vessel 101.
The cavity 102 is configured so that at least the vessel 101 side is opened and the molten material M dropped from the vessel 101 is introduced to the inside of the cavity 102. It is preferable that the coolant W be stored at least to a depth at which the cooling acceleration device 103 is submerged. In other words, it is preferable that a liquid level of the coolant W be located at a position which is higher than an upper end of the cooling acceleration device 103 and close to the upper end.
The passage formation portion 104 is in a state in which at least an end portion 104b, which is a downstream side of the passage, opens, and the coolant W in the cavity 101 can always enter and exit the passage formation portion 104.
From the viewpoint of guiding the molten material M dropped into the passage formation portion 104 to flow toward the downstream side (that is close to the end portion 104b) along the passage, an end portion 104c, which is an upstream side of the passage formation portion 104, is preferably occupied by a wall. Further, from the same viewpoint, it is preferable that a bottom surface of the passage formation portion 104 be inclined to become lower toward the end portion 104b.
The form of the introduction portion 105 is not particularly limited. However, for example, it is possible to provide a through hole formed in a side wall of the passage formation portion 104, to which the molten material M is dropped from the vessel 101, facing the vessel 101 (the upper side of the passage formation portion 104, in
It is preferable that an area of a cross section S1 of the passage formation portion 104, is perpendicular to a bottom surface 104a, be 2000 mm2 or more and 20000 mm2 or less. If the area of the cross section S1 is less than 2000 mm2, it is difficult to sufficiently cool the molten material M. Also, if the area of the cross section S1 exceeds 20000 mm2, a ratio of the portion which comes into contact with the coolant and is roughly mixed increases, and as a result, rapid boiling of water easily occurs. Further, the bottom surface 104a of the passage formation portion of the present embodiment is one of the inner wall surfaces of the passage formation portion 104, which is located lower side in the vertical direction with respect to the other, in a state where the passage formation portion 104 is installed in the cavity 102.
It is preferable that a cross section S2 of the passage formation portion 104, is perpendicular to an extending direction L, be vertically elongated. Specifically, in the cross section S2, a maximum horizontal length D2 of the cross section is preferably 1 to 200 times a maximum vertical length D1 of the cross section.
As described above, the industrial equipment 100 according to the present embodiment is configured so that the molten material M is dropped into a tubular passage 104 storing the coolant W. After the molten material M is dropped, a space surrounded by the side walls of the passage is in a state in which the molten material accumulates on the lower area of the space, and water accumulates on the upper area of the space. In this case, since the diffusion of the molten material M in the horizontal direction is restricted, a contact area of the molten material M with the coolant W is smaller than in a case where the same amount of the molten material M is not accommodated in the passage and spreads to diffuse on the floor surface. Therefore, it is possible to reduce the ratio of one portion of the molten material M, which is coming into contact with the coolant W and roughly mixing therewith, with respect to the other portion of the molten material M accommodated in the passage, and thereby rapid boiling of the coolant W can be suppressed.
In addition, in the industrial equipment 100 according to the present embodiment, since the molten material M is accommodated in the narrow space in the passage formation portion 104, heat of the molten material M is held in the passage formation portion 104, and the temperature of the coolant W stored in the same space rapidly rises. Therefore, the interior of the passage formation portion 104 is in a vapor-rich state, and generation of new steam, which is a cause of shock wave generation, does not easily occur, and as a result, rapid boiling of the coolant W can be further suppressed.
The configuration of each of the passage formation portion 204 and the introduction portion 205 is the same as that of the passage formation portion 104 and the introduction portion 105 in the first embodiment, and in the cooling acceleration device 203 of this embodiment, at least the same effect as that of the cooling acceleration device 103 of the first embodiment can be obtained.
Furthermore, since the plurality of passage formation portions 204 are arranged, even when, for example, the position at which the molten material M is dropped is not specified, it is possible to introduce the molten material M into any one of the passage formation portions 204 with a high probability as compared with a case where only one passage formation portion 204 is disposed. Therefore, it is possible to prevent a situation in which the dropped molten material M is not introduced into any of the passage formation portions 204 and comes into contact with the coolant W outside the cooling acceleration device 203, and it is possible to prevent the occurrence of the rapid boiling of the coolant W with contact.
When the molten material M flowing on the plate-like member 306 reaches the position of the through hole 305, in some cases, the molten material M jumps over the opening region of the through hole 305 and collides with the inner wall on the back side of the through hole 305. In that case, there is a risk of the molten material M that has collided jumping up and flowing out to the outside of the cooling acceleration device 303.
In order to prevent the molten material M from flowing out, it is preferable that the through hole 305 have a shape diffusing in the direction in which the molten material M flows. As such a shape, it is possible to adopt, for example, an elliptical shape, a rectangular shape or the like formed so that the longitudinal direction is substantially parallel to the flow direction of the molten material M. From the viewpoint of increasing the length in the longitudinal direction and suppressing the opening area to the minimum, the elliptical shape is more preferable.
As illustrated in
From the viewpoint of accelerating the flow of the molten material M to be introduced in the passage formation portion 304, the bottoms (a lower wall) of the plurality of passage formation portions are preferably inclined so that the downstream side becomes lower. The angle of inclination may be constant or may change continuously or intermittently. In
In the structure in which the passage formation portions 304 are stacked in the height direction H as in the present embodiment, the introduced molten material M flows to diffuse in the height direction (the depth direction) H in the passage due to the influence of gravity. Thus, the cooling can be performed without increasing the contact area with the coolant W.
In the case where the cooling acceleration device according to the above-described three embodiments is an integral structure, it is difficult to construct the cooling acceleration device in a space that is restricted by existing structures and the like, but in the case where the cooling acceleration device is a divisible structure, the cooling acceleration device can be assembled to avoid existing structures. For example, in the case where a plurality of pillars are standing in the execution space in a fence shape as an existing structure, even though the cooling acceleration device itself in its completed state is too large and does not pass between the pillars, divided small members can pass between the pillars. That is, it is possible to insert a plurality of divided members from between the pillars and carry them in a predetermined position by rotating them or the like, and a predetermined cooling acceleration device can be assembled between the carried members.
The protrusion 408 can be formed, for example, by attaching a plurality of other plate-like members to the plate-like member 406. There are no restrictions on the attaching directions, but as illustrated in
The protrusion 408 functions as a pocket of steam generated with the inflow of the molten metal, and has a structure in which the steam does not easily escape to the outside. When the coolant flows into each passage formation portion 404 for the first time, steam is accumulated between the protrusions 408. In order to enhance the pocket function of the steam, it is preferable that the protrusion 408A near the introduction portion (the through hole) 405 be longer in the protruding direction than the other protrusion 408B.
In such a configuration, the interior of the passage formation portion 404 is in a vapor-rich state, generation of new steam, which is a cause of generation of a shock wave, does not easily occur, and as a result, rapid boiling of the coolant can be further suppressed.
The protrusion 509 can be formed by, for example, attaching another plate-like member to the plate-like member 506. It is preferable that the attachment be performed so that the main surface of the plate-like member is substantially perpendicular to the flowing direction of the molten material. The protrusion 509 may be integral with or separate from the plate-like member 506.
The protrusion 509 functions as a sacrificial material for partitioning the flow of the molten material M for a predetermined time. For example, as illustrated in
Examples of the material of the protrusions 509 include silica, calcium, iron, and the like. By adjusting the number and position of the protrusions 509, since it is possible to limit the amount of the coolant allocated to each passage formation portion 504, high voids can be achieved in a short time, the rough mixing phenomenon is prevented from being accelerated, and it is possible to suppress the rapid boiling of water.
The protrusion 509 melts into the molten material when the protrusion 509 comes into contact with the molten material and a predetermined time passes. The molten protrusion 509 lowers the viscosity of the molten material and diffuses between the passage formation portions, and thus becomes an effective component in a subsequent long-term cooling process.
Since the covering member 610A is installed, the occurrence of ablation (loss) in the top plate 606A can be prevented when a high-temperature molten material M flows. In the case of thinly diffusing the molten material in the cavity, a layer of alkaline concrete such as silica and calcium may be installed on the covering member 610A to lower the viscosity of the molten material.
In a plate-like member (a lower plate) 606B below the top plate 606, it is preferable that a covering member 610B also be provided at a position overlapping the position of the through hole 605 of the top plate 606. In this case, it is possible to prevent a situation in which the molten material M dropping from the through hole 605 collides with the lower plate and bores a hole at that place.
Since the protruding portion 711 is disposed on the top plate 706A, even when the molten material flows over the top plate 706A, since the diffusing range of the molten material is narrowed, the rough mixing phenomenon is prevented from being accelerated, and it is possible to suppress the rapid boiling of water.
Since the lid member 812 is made of a material that melts when it comes into contact with the molten material, the molten material that tries to pass through the lid member 812 melts the lid member 812, and falls from the melted hole (the through hole) to the lower stage and flows down. The lid member 812 that remains without being melted plays a role of blocking the outlet of the steam in the cooling acceleration device 803, and it is possible to increase the temperature of the coolant.
While preferred embodiments of the invention have been described and illustrated above, it should be understood that these are exemplary of the invention and are not to be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit or scope of the present invention. Accordingly, the invention is not to be considered as being limited by the foregoing description, and is only limited by the scope of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2017-231002 | Nov 2017 | JP | national |
