WO2011125366A1 - Device for vacuum supplying molten metal - Google Patents

Abstract

A device for vacuum supplying molten metal, capable of efficiently supplying the molten metal to a molten metal conveying ladle. A device for vacuum supplying molten metal to a molten metal conveying ladle (2) equipped with a ladle body (20) having a pouring opening (26) into which molten metal is poured and also having a containing space (21) which contains the molten metal. The device is provided with: a lid plate (3) which is supported above the ladle body (20) so as to be vertically movable and which can close the pouring opening (26) of the ladle body (20) to seal the containing space (21); a lifting mechanism (4) for vertically moving the lid plate (3); a molten metal supplying pipe (6) provided to the lid plate (3), the molten metal supplying pipe (6) connecting the inside and outside of the containing space (21) and capable of supplying molten metal to the containing space (21); a vacuum device (5) for reducing the pressure within the containing space (21) and introducing molten metal into the containing space (21) from the suction opening (60) at the front end of the molten metal supplying pipe (6); and a support mechanism (7) for pivotably supporting the ladle body (20).

Description

Vacuum water heater

The present invention relates to a vacuum hot water supply apparatus for transferring a molten metal from a molten metal melting furnace to a molten metal conveying ladle.

製造 When producing cast products such as aluminum by the die casting method, casting work is usually performed in a factory equipped with a large number of die casting machines in order to increase productivity. Molten metal (molten metal) is poured into a die casting machine by transferring the molten metal from a molten metal holding furnace for the die casting machine to a pouring pot and supplying the molten metal from the pouring pot. On the other hand, the molten metal holding furnace always needs to hold a predetermined amount of molten metal. However, the molten metal once melted in the melting furnace in the molten metal production site inside or outside the factory is solidified into an ingot, and then the casting site. It is not energy efficient to dissolve again. Therefore, it has been conventionally carried out that the molten metal melted in the melting furnace at the molten metal production site is conveyed as it is to the casting site by the molten metal conveying ladle. As such a molten metal conveyance ladle, there exist some which were disclosed by patent document 1, for example.

As shown in FIG. 6, this type of molten metal transport ladle 100 is detachably attached to a ladle body 101 having a storage space 106 for storing molten metal and an inlet 102 formed on the upper surface of the ladle body 101. And a molten metal pouring pipe 104 provided in the ladle main body 101. By tilting the ladle main body 101, the molten metal is discharged from the pouring outlet 105 at the tip of the molten metal pouring pipe 104. The molten metal is supplied to the molten metal holding furnace. In addition, as other molten metal conveyance ladles, a gas introduction pipe (not shown) for introducing compressed air into the ladle body is provided, and compressed air supply means (for example, a compressor) is provided in the gas introduction pipe. There is also a pressurized hot water type that pushes the molten metal accommodated in the hot water outlet of the hot water outlet by connecting and introducing compressed air into the pan body and pressurizing the hot water surface.

Here, the inlet 102 of the ladle body 101 is used for operations such as pouring molten metal into the storage space 106 below, removing scum (such as aluminum oxide) on the molten surface, and measuring the temperature of the molten metal. However, when the molten metal of the melting furnace is transferred from the inlet 102 to the storage space 106 at the molten metal production site, a vacuum hot water supply apparatus 200 as shown in FIG. 7 has been conventionally used.

A vacuum hot water supply apparatus 200 shown in FIG. 7 includes a support member 201 that is suspended by a crane or the like so as to reciprocate in a vertical direction, a cover plate 202 that is swingably supported by the support member 201, and a cover plate 202. A hot water supply pipe 203 for transferring molten metal stored in the melting furnace 205 into the ladle body 101, a mounting table 204 for placing the ladle body 101, and a vacuum device such as a vacuum pump (not shown). I have. The lid plate 202 is formed with a suction hole (not shown) that communicates with the storage space of the ladle body 101, and appropriate piping such as a flexible tube extending from the vacuum device is connected to the suction hole. . In the figure, reference numeral 206 denotes a balance weight, and the weight of the balance weight 206 and the weight of the hot water supply pipe 203 are kept in balance, so that the cover plate 202 is held in a balanced horizontal state.

When the molten metal is transferred from the melting furnace 205 to the storage space in the ladle body 101, the lid plate 202 is lowered by a crane or the like, and the lid plate 202 is brought into surface contact with the upper surface of the ladle body 101, so that the lid plate 202 is moved. The storage space is sealed by closing the inlet. And by depressurizing (evacuating) the inside of the ladle main body 101 with a vacuum apparatus, the molten metal in the melting furnace 205 is sucked up from the suction port at the tip of the hot water supply pipe 203 and transferred into the ladle main body 101. .

JP 2001-287021 A

When the molten metal is transferred into the ladle body 101 by repeatedly using the vacuum hot water supply apparatus 200 configured as described above, there is a possibility that the slag 207 or the like may adhere to the surface of the tip of the hot water supply pipe 203. When the slag 207 or the like adheres to the tip of the hot water supply pipe 203, the weight of the hot water supply pipe 203 is increased by that amount, so that the balance with the balance weight 206 cannot be maintained. As a result, the lid plate 202 is inclined toward the hot water supply pipe 203 side. Will be held in. As a result, when the inlet of the ladle body 101 is closed with the lid plate 202, the lid plate 202 is inclined as shown by a two-dot chain line in FIG. A gap S is generated between the lid plate 202 and the ladle body 101 without surface contact. As a result, air leakage from the injection port occurs, so that evacuation by the vacuum device is hindered, and there is a problem that the molten metal supply operation cannot be performed efficiently.

In addition, since the lid plate 202 and the hot water supply pipe 203 are integrally attached to the support member 201 so as to be swingable, the tip of the hot water supply pipe 203 may cause lateral shaking or the like when the lid plate 202 is moved up and down. . As a result, when the tip of the hot water supply pipe 203 hits the side wall 205A of the melting furnace 205 or the like, the molten metal supply operation must be stopped, and similarly, there is a problem that the molten metal supply operation cannot be performed efficiently.

This invention is made paying attention to the above-mentioned problem, and it aims at providing the vacuum hot-water supply apparatus which can perform the supply operation | work of the molten metal to a molten metal conveyance ladle efficiently.

The object of the present invention is an apparatus for supplying molten metal to the storage space of a molten metal transporting ladle having a ladle main body having an inlet for injecting molten metal on the upper surface and having a storage space for molten metal inside. A lid plate which is supported above the ladle body so as to be movable up and down, and whose bottom surface is in contact with the top surface of the ladle body to close the inlet, and the lid plate is moved up and down. An elevating mechanism capable of supplying water, a hot water supply pipe penetrating the cover plate and communicating with the inside and outside of the storage space, and supplying molten metal to the storage space; and depressurizing the storage space from a suction port at a tip of the hot water supply pipe The lid by swinging the ladle body or only the lid plate at the time of contacting the ladle body and the lid plate with a vacuum device for taking molten metal into the storage space Interview the lower surface of the plate and the upper surface of the ladle body It is accomplished by a vacuum water heater and a swing mechanism capable of.

In a preferred embodiment of the present invention, the swing mechanism includes a fixing member that fixes the hot water supply pipe and a connecting member that swingably connects the lid plate to the fixing member. Is characterized by supporting the fixing member in a horizontal state and moving the fixing member up and down while maintaining its posture.

In the vacuum hot water supply apparatus according to the aspect described above, the flexible member is provided between the fixing member and the cover plate so as to surround the hot water supply pipe. It is preferable that a seal member for sealing the space is provided.

In another preferred embodiment of the present invention, the swinging mechanism is characterized by comprising a support mechanism that swingably supports the ladle body.

In the vacuum hot water supply apparatus according to the aspect described above, it is preferable that the elevating mechanism supports the cover plate in a horizontal state and moves the cover plate up and down while maintaining its posture.

Further, the support mechanism includes a mounting base on which a mounting base fixed on a floor surface, one or a plurality of springs provided on the mounting base, and the ladle body provided on the spring can be placed. It is preferable that the mounting table is supported in a tilt-free state with respect to the mounting base by the elastic force of the spring.

The support mechanism includes a mounting base fixed on the floor, a rubber plate provided on the mounting base, and a mounting table on which the ladle body provided on the rubber plate can be mounted. In addition, the mounting table may be supported in a tilt-free state with respect to the mounting base by the elastic force of the rubber plate.

Further, it is preferable that the mounting base is constituted by a lifter capable of moving up and down the mounting table.

According to the vacuum hot water supply apparatus of the present invention, the molten metal supply operation to the molten metal conveying ladle can be performed efficiently.

It is a front view of the vacuum hot-water supply apparatus which concerns on one Embodiment of this invention. It is a side view of the vacuum hot-water supply apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which concerns on the structure of a part of FIG. It is a front view of the vacuum hot-water supply apparatus which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view which shows the principal part of the vacuum hot-water supply apparatus which concerns on other embodiment of this invention. It is sectional drawing of the molten metal conveyance ladle of a prior art example. It is a front view which shows the schematic structure of the vacuum hot-water supply apparatus of a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2 show a schematic configuration of a vacuum hot water supply apparatus 1 according to an embodiment of the present invention. FIG. 3 is a longitudinal sectional view of FIG. 2, in which the lifting mechanism 4 and the vacuum device 5 are omitted. This vacuum hot water supply apparatus 1 is used for pumping (transferring) molten metal from a melting furnace 10 for manufacturing and storing molten metal to a molten metal transport ladle 2 at a manufacturing site of molten metal (molten metal) such as aluminum. .

The molten metal transfer ladle 2 is used to transport and supply molten metal from a molten metal production site to a molten metal holding furnace (not shown) installed at a molten metal casting site, as shown in FIGS. The bottomed cylindrical ladle body 20 having a storage space 21 for storing molten metal, and the molten metal pouring capable of pouring the molten metal stored in the storage space 21 by tilting the ladle body 20 to the outside. And a tube 22.

The ladle body 20 has a flat upper surface and a bottom surface, and is formed by lining a fireproof layer 20B made of a heat insulating material and a fireproof material on a metal shell layer 20A formed of a metal such as steel. Here, examples of the heat insulating material include heat insulating brick, ceramic fiber felt, heat insulating board, and mortar. Examples of the refractory material include refractory bricks, castable refractories, and plastic refractories.

Also, the ladle body 20 includes a ladle lower portion 23 that can accommodate molten metal, and a ladle upper portion 24 that is continuous with the ladle lower portion 23 at the lower end and covers the upper opening 25 of the ladle lower portion 23. The ladle lower portion 23 and the ladle upper portion 24 may be formed integrally, or may be formed as separate bodies and connected by a connecting member.

An inlet 26 for pouring the molten metal into the storage space 21 is provided at a substantially central portion on the upper surface of the ladle body 20 (upper ladle upper portion 24). In addition, the ladle upper portion 24 is provided with an air outlet pipe 27 that communicates the inside and outside of the ladle body 20, and draws air from the storage space 21 in the ladle body 20 to reduce the internal pressure. This air outlet pipe 27 is a pipe to which the vacuum device 5 described later is connected, and is provided so as to protrude obliquely upward and outward from the ladle upper portion 24. The storage space 21 is depressurized (evacuated) by the vacuum device 5 through the air outlet tube 27, so that the inside of the ladle body 20 can be evacuated or substantially evacuated. Although not shown in the drawing, the upper portion 24 of the ladle is provided with an upper lid that can cover the inlet 26 provided on the upper surface so as to be freely opened and closed.

The molten metal pouring pipe 22 is a molten metal flow path that communicates the inside and outside of the storage space 21 in the ladle body 20, and is provided so as to protrude obliquely upward from the side surface of the ladle lower portion 23. The molten metal pouring pipe 22 is formed by lining a fireproof layer 22B made of a heat insulating material and a fireproof material in a pipe of a metal pipe 22A formed of a metal such as steel. The same material as the ladle body 20 can be used for the heat insulating material and the refractory material. In addition, the molten metal pouring pipe 22 may be formed integrally with the ladle lower part 23, or may be configured to be formed and connected separately.

A closing member 29 such as a flange is detachably attached to the hot water outlet 28 at the front end opening of the molten metal pouring pipe 22. The closing member 29 is used to seal the discharge port 28 so that air does not leak from the discharge port 28 of the molten metal pouring pipe 22 when the inside of the ladle body 20 is depressurized via the vacuum device 5. is there. A heat-resistant sealing material or the like may be provided between the hot water outlet 28 and the closing member 29.

The vacuum hot water supply apparatus 1 according to the present embodiment includes a lid plate 3 that is arranged to be able to reciprocate in the vertical direction above the ladle body 20, a lifting mechanism 4 that reciprocates the lid plate 3 in the vertical direction, and a ladle body. The vacuum device 5 for depressurizing the storage space 21 in the 20, the hot water supply pipe 6 for taking the molten metal stored in the melting furnace 10 into the storage space 21 in the ladle body 20, and the ladle body 20 are swung. And a support mechanism 7 that supports the same as possible.

The cover plate 3 is made of a fireproof material or a fireproof material and a heat insulating material, and the outer peripheral surface of the cover plate 3 is covered with a metal case 30. This lid plate 3 has a diameter larger than the diameter of the inlet 26 provided on the upper surface of the ladle upper portion 24 and has a sufficient thickness, and the flat lower surface thereof is the flat upper surface of the ladle upper portion 24. The storage space 21 in the ladle body 20 can be hermetically sealed by covering the inlet 26 with the surface of the inlet 26, thereby reducing the pressure in the ladle body 20 via the vacuum device 5. In this case, air or the like is prevented from leaking between the lid plate 3 and the ladle upper portion 24. Note that a heat-resistant (for example, carbon-based) sealing material or the like may be disposed between the lid plate 3 and the ladle upper portion 24 so as to improve the sealing performance. An insertion hole 31 into which the hot water supply pipe 6 can be inserted is formed at a substantially central portion of the lid plate 3.

The hot water supply pipe 6 is a flow path of molten metal that communicates the inside and outside of the storage space 21 in the ladle body 20, and is stored in the melting furnace 10 by depressurizing the inside of the ladle body 20 via the vacuum device 5. It is possible to suck the molten metal from the suction port 60 at the tip thereof and transfer it into the ladle body 20. The hot water supply pipe 6 is formed in a shape that bends at two locations, and the discharge port 61 at the base end of the hot water supply pipe 6 passes through the substantially central portion of the cover plate 3 and passes through the injection port 26 in the storage space 21. On the other hand, the suction port 60 at the tip of the hot water supply pipe 6 is disposed so as to face downward outside the ladle body 20. The hot water supply pipe 6 is fixed to the cover plate 3 and is inserted in an airtight state into the insertion hole 31 of the cover plate 3 so that air and molten metal do not leak from the through-hole through the cover plate 3. In order to improve airtightness, a seal member such as an O-ring may be interposed between the hot water supply pipe 6 and the lid plate 3.

The hot water supply pipe 6 is formed by lining a metal pipe 62 with a refractory layer 63 made of a calcium silicate refractory material or the like, and the refractory layer 63 improves heat insulation and wear resistance against molten metal flow. In order to prevent the hot water supply pipe 6 from coming into contact with the molten metal and causing melt damage, it is preferable to cover the surface of the metal tube 62 with a refractory material such as silicon nitride.

Further, the storage space insertion portion 64 at the base end of the hot water supply pipe 6 may be formed of a ceramic tube. With such a configuration, the heat resistance of the hot water supply pipe 6 is improved, and the occurrence of a situation in which the metal portion of the hot water supply pipe 6 is melted and mixed into the molten metal stored in the storage space 21 is prevented. The quality of the molten metal stored in the storage space 21 can be maintained.

The elevating mechanism 4 moves the cover plate 3 up and down while supporting the cover plate 3 in a horizontal posture, thereby bringing the cover plate 3 into contact with the upper surface of the pan body 20 from above, and a pair of vertically installed on the floor surface. Guide rails 40, 40, movable bodies 41, 41 arranged on each guide rail 40 so as to be slidable in the vertical direction, and movable frames 42 supported by the respective movable bodies 41.

The guide rails 40 are straight steel bars that are parallel to each other, and are provided in an upright posture so as to face each other with the ladle body 20 in between. Each movable body 41 has a ring shape and includes a ball bearing (not shown) inside. Each guide rail 40 is fitted and inserted in each movable body 41, so that each movable body 41 can slide in the longitudinal direction of the guide rail 40.

The movable frame 42 includes a pair of left and right suspension rods 43, 43 that are parallel to each guide rail 40, and a horizontal connection rod 44 that couples the suspension rods 43, 43. Each movable body 41 is connected to the side surface. Therefore, the movable frame 42 reciprocates in the vertical direction while maintaining its posture while being guided (guided) by the guide rails 40.

The lid plate 3 is connected to the lower ends of the suspension rods 43, 43 so as to be in a horizontal state. A suspension ring 45 is formed at the center position of the connecting rod 44. By inserting and locking a hook 46 attached to a crane car (not shown) or the like to the suspension ring 45, the lid plate 3 can be supported in a horizontal posture by the crane via the movable frame 42, and the lid The plate 3 can be moved up and down above the ladle body 20 in a state where the plate 3 is kept horizontal.

The support mechanism 7 constitutes a rocking mechanism 8 that brings the lower surface of the lid plate 3 into contact with the upper surface of the ladle body 20 when the ladle body 20 and the lid plate 3 are in contact with each other. The ladle body 20 is rocked with respect to the lid plate 3 to bring the lower surface of the lid plate 3 into contact with the upper surface of the ladle body 20. The support mechanism 7 of the present embodiment includes a mounting base 70 fixed on the floor, a mounting table 71 on which the ladle body 20 provided on the mounting base 70 can be mounted, the mounting base 70 and the mounting table. And a support member 72 that is interposed between the support base 71 and horizontally supports the mounting table 71 in a freely tilting manner with respect to the mounting base 70.

The mounting base 70 has a size corresponding to the size of the mounting table 71, and in the present embodiment, is configured by a lifter that can be moved up and down. The lifter displaces a horizontal lifting platform 74 up and down with respect to the base 73 by a pantograph lifting device 75, and expands and contracts the pantograph by the operation of a cylinder mechanism 76 that is a drive source of the lifting device 75. The height of the mounting table 71, that is, the installation height of the ladle body 20 can be adjusted to a desired height by moving the lifting table 74 up and down while maintaining a horizontal posture. .

In this embodiment, the support member 72 is configured by a plurality of (four in this embodiment) rubber springs 77 that can be elastically deformed. The rubber spring 77 has a cylindrical shape in which a rubber material is molded around the coil spring, and is fixed to the four corner positions between the elevating table 74 and the mounting table 71. For this reason, the mounting table 71 is mounted on the lifting platform 74 via the rubber springs 77. As a result, the mounting table 71 is always supported in a horizontal posture on the lifting platform 74 and pressed from above. When a pressing force is applied to the mounting table 71, each rubber spring 77 is elastically deformed according to the pressing force applied via the mounting table 71, so that the mounting table 71 tilts in any direction. By the tilting of the mounting table 71, the ladle body 20 of the molten metal transfer ladle 2 mounted on the mounting table 71 swings in an arbitrary direction.

The shape of the rubber spring 77 is not limited to a cylindrical shape, and may be, for example, a substantially conical shape (tapered shape) spreading toward the lower end, or may be a leaf spring shape.

In the present embodiment, a plurality of rubber springs 77 are used as the support member 72. However, the support member 72 is not limited to this as long as it supports the mounting table 71 horizontally with respect to the mounting base 70. Instead, for example, as shown in FIG. 4, as the support member 72, a plate-shaped anti-vibration rubber 78 having an elastic force may be interposed between the elevating table 74 and the mounting table 71.

Also in the embodiment shown in FIG. 4, as a result of the mounting table 71 being elastically mounted on the lifting table 74 via the anti-vibration rubber 78, the mounting table 71 is always supported in a horizontal posture on the lifting table 74. At the same time, when a pressing force is applied to the mounting table 71 by being pressed from above, the vibration isolation rubber 78 is elastically deformed according to the pressing force acting on itself via the mounting table 71, so that the mounting table 71 is moved back and forth. As a result, the ladle body 20 of the molten metal transport ladle 2 placed on the placing table 71 swings in an arbitrary direction. Instead of the anti-vibration rubber 78, a viscoelastic body having elasticity as in the anti-vibration rubber may be used.

The mounting table 71 is a flat plate having a size corresponding to the size of the ladle body 20 and a sufficient thickness. On the upper surface of the mounting table 71, a misalignment prevention wall 79 is erected so as to surround the periphery of the ladle body 20 to be mounted. Thereby, even when the mounting table 71 tilts in an arbitrary direction, the inner surface of the misalignment prevention wall 79 directly receives and supports the outer peripheral surface of the ladle body 20, so that the ladle body 20 tilts the mounting table 71. Without being moved in the direction or even falling down, it is prevented from falling from the mounting table 71 and tilted in any direction together with the mounting table 71.

Next, a method of transferring the molten metal from the melting furnace 10 at the molten metal production site into the ladle body 20 of the molten metal conveying ladle 2 using the vacuum hot water supply apparatus 1 having the above-described configuration will be described. First, the ladle body 20 of the molten metal transport ladle 2 is placed so as to be positioned in the position shift prevention wall 79 on the upper surface of the placing table 71. Next, a hook such as a crane truck is inserted and locked to the suspension ring 45 of the movable frame 42 to suspend the movable frame 42 in a horizontal posture.

Then, by moving the movable frame 42 downward, the lid plate 3 to which the hot water supply pipe 6 is attached is moved downward and pressed against the upper surface of the ladle body 20 (top of the ladle 24) from above. At this time, the lid plate 3 is supported in a horizontal state by the elevating mechanism 4, and is pressed against the upper surface of the ladle body 3 (the ladle upper portion 24) with its lower surface kept horizontal. The upper surface of the main body 20 (the ladle upper portion 24) and the lower surface of the lid plate 3 are in close contact with each other by surface contact.

Here, during the downward movement of the cover plate 3, it is assumed that the horizontal state of the cover plate 3 collapses and is pressed against the upper surface of the ladle body 20 (ladder upper portion 24) with its lower surface tilted. In addition, since the ladle body 20 is swingably supported by the support mechanism 7, when the lid plate 3 is pressed against the upper surface of the ladle body 20 (the ladle upper portion 24), it is adjusted to the inclination of the lid plate 3. The ladle body 20 (the ladle upper part 24) tilts in any direction together with the mounting table 71. As a result, the upper surface of the ladle body 20 (the ladle upper portion 24) and the lower surface of the lid plate 3 are in close contact with each other by surface contact. The inlet 26 is completely closed by the cover plate 3. Therefore, in the vacuum hot water supply apparatus 1 according to the present embodiment, no gap is generated between the lid plate 3 and the ladle body 20, so that the storage space 21 is well sealed. At this time, the opening 28 of the molten metal pouring pipe 22 is closed by the closing member 29.

Next, the vacuum device 5 is connected to the air outlet pipe 27 and the inside of the ladle body 20 is decompressed (evacuated), whereby the molten metal in the melting furnace 10 is sucked from the suction port 60 of the hot water supply pipe 6 and discharged. The molten metal is pushed out from the outlet 61 into the storage space 21, and the molten metal is transferred into the ladle body 20. In addition, since the opening 28 of the molten metal pouring pipe 22 is closed by the closing member 29, the molten metal is not blown from the opening 28.

When the supply operation of the molten metal is completed, the pressure in the ladle body 20 is returned to the original state, and the movable frame 42 is moved upward, whereby the lid plate 3 to which the hot water supply pipe 6 is attached is removed from the ladle body 20 ( Remove from the upper ladle 24). Then, the upper lid (not shown) is closed, and the molten metal transport ladle 2 in which the molten metal is stored is transported by a forklift or the like to a hand furnace of a die casting machine for performing a casting operation.

According to the vacuum hot water supply apparatus 1 having the above-described configuration, as a result of repeatedly supplying the molten metal to the ladle body 20, slag or the like adheres to the vicinity of the suction port 60 at the tip of the hot water pipe 6, and the weight of the hot water pipe 6 However, the cover plate 3 is held in the horizontal state as much as possible by the elevating mechanism 4 and moves up and down while maintaining its posture, so that the tip of the hot water supply pipe 6 is attached to the cover plate 3. There is no possibility of causing a lateral shake or the like during the lifting / lowering operation, and as a result, the tip of the hot water supply pipe 6 does not hit the side wall of the melting furnace 10 or the like and is not damaged.

In addition, slag or the like adheres to the vicinity of the suction port 60 at the tip of the hot water supply pipe 6 and the weight of the hot water supply pipe 6 increases accordingly, so that the horizontal posture of the cover plate 3 is somewhat collapsed, and the cover plate 3 temporarily becomes hot water supply pipe. Even if the ladle body 20 is pressed against the upper surface of the ladle body 20 (the ladle upper part 24) in a state inclined to the 6 side, the ladle body 20 is supported by the support mechanism 7 so as to be swingable. In addition, the ladle body 20 (the ladle upper part 24) tilts in an arbitrary direction. As a result, the lower surface of the lid plate 3 is in close contact with the upper surface of the ladle body 3 (the ladle upper portion 24) and comes into close contact therewith, so that the inlet 26 on the upper surface of the ladle body 20 (the ladle upper portion 24) The plate 3 is completely closed. This prevents a gap from being formed between the lid plate 3 and the ladle body 20, so that when the vacuum device 5 is evacuated, air does not leak from the inlet 26 and the molten metal is supplied. Can be performed efficiently.

FIG. 5 is a longitudinal cross-sectional view showing the main configuration of a vacuum hot water supply apparatus 1 ′ according to another embodiment of the present invention. The vacuum hot water supply apparatus 1 ′ of the present embodiment is also provided with a lid plate 3 disposed above the ladle body 20 so as to be able to reciprocate in the vertical direction, and an elevating mechanism for reciprocating the lid plate 3 in the vertical direction (not shown). And a vacuum device 5 for depressurizing the storage space 21 in the ladle body 20 and a hot water supply pipe 6 for taking the molten metal stored in the melting furnace (not shown) into the storage space 21 in the ladle body 20. And a rocking mechanism 8 ′ for bringing the lower surface of the lid plate 3 into contact with the upper surface of the ladle body 20 when the ladle body 20 and the lid plate 3 are in contact with each other. In addition, in the vacuum hot water supply apparatus 1 'of this embodiment, about the site | part same as the structure of the vacuum hot water supply apparatus 1 of above-described embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol. Moreover, in the vacuum hot-water supply apparatus 1 'of this embodiment, the ladle main body 20 of the molten metal conveyance ladle 2 is mounted on the flat mounting stand (not shown) fixed on the floor surface.

The swinging mechanism 8 ′ of the present embodiment swings only the lid plate 3 with respect to the ladle body 20 when the ladle body 20 and the lid plate 3 are in contact with each other, so that the lower surface of the lid plate 3 and the ladle As shown in FIG. 5, the fixing member 80 to which the hot water supply pipe 6 is fixed and the lid plate 3 disposed below the fixing member 80 are shaken by the fixing member 80. And a plurality of connecting members 81 that are movably connected.

The fixing member 80 is a flat plate made of, for example, metal, and a through hole 83 into which the hot water supply pipe 6 is inserted is formed at a substantially central portion thereof. The discharge port 61 at the base end of the hot water supply pipe 6 is disposed so as to be positioned above the storage space 21 through the injection port 26 of the ladle body 20 by passing through the fixing member 80 and the cover plate 3. . The hot-water supply pipe 6 is fixed to the fixing member 80 by fixing the flange portion 65 to the plate surface of the fixing member 80 by fixing means (not shown) such as a bolt or a nut. Thus, when the fixing member 80 moves up and down, the hot water supply pipe 6 is prevented from shaking. Note that the hot water supply pipe 6 is only inserted into the insertion hole 31 of the cover plate 3 with respect to the cover plate 3, and is not integrally connected to the cover plate 3.

Therefore, between the fixing member 80 and the cover plate 3, so that air or the like does not leak into the storage space 21 of the ladle body 20 from the gap between the insertion hole 31 of the cover plate 3 and the hot water supply pipe 6, A tubular seal member 82 is provided so as to surround the hot water supply pipe 6. The seal member 82 is formed in a tubular shape from a flexible material, and is soft and can be freely deformed in any direction. In this embodiment, the seal member 82 has a bellows structure that can expand and contract in its entire length, and each flange portion provided at the upper end portion and the lower end portion is welded to the lower surface of the fixing member 80 and the upper surface of the lid plate 3, respectively. It is fixed by.

According to this sealing member 82, the space around the hot water supply pipe 6 between the fixing member 80 and the lid plate 3 is in an airtight state, and therefore the storage space 21 of the ladle body 20 is evacuated by the vacuum device 5. In addition, air does not leak from the insertion hole 31 of the cover plate 3, and the storage space 21 can be satisfactorily sealed. Further, since the seal member 82 has flexibility and is entirely formed in a bellows structure, the seal member 82 can be freely deformed (expanded or bent) in any of the upper, lower, front, rear, and left and right directions. Therefore, even when the cover plate 3 swings with respect to the fixing member 80 as will be described later, the sealing member 82 is appropriately deformed in accordance with the swing of the cover plate 3, so that the fixing member 80 and the cover The airtightness around the hot water supply pipe 6 between the plates 3 can be easily maintained.

The fixing member 80 is supported in a horizontal state by an elevating mechanism (not shown) and supported so as to be movable up and down while maintaining the horizontal state. Thereby, since the cover plate 3 connected below the fixing member 80 also moves up and down integrally with the fixing member 80, the cover plate 3 can be brought into contact with the pan body 20. This lifting mechanism can be configured in the same manner as the lifting mechanism 4 in the embodiment of FIGS. 1 and 2 described above. In this embodiment, the lifting mechanism is provided at the lower ends of the left and right suspension rods of the movable frame constituting the lifting mechanism. The fixing member 80 is connected so as to be in a horizontal state.

The connecting member 81 is made of an elastic material. In the present embodiment, the connecting member 81 is made of an elastically deformable rubber spring. The connecting member 81 has an upper end fixed to the fixing member 80 and a lower end fixed to the cover plate 3, and is provided at a plurality of locations that uniformly surround the hot water supply pipe 6. As a result, the cover plate 3 is swingably connected to the fixing member 80 and is normally supported in a horizontal posture below the fixing member 80, while the cover plate 3 is moved downward by the movement of the cover plate 3. When 3 comes into contact with the upper surface of the ladle body 20, each connecting member 81 is elastically deformed, so that only the cover plate 3 swings in the front, rear, left, and right arbitrary directions. Due to the swing of the lid plate 3, when the ladle body 20 and the lid plate 3 are in contact with each other, the lower surface of the lid plate 3 is brought into surface contact with the upper surface of the ladle body 20, and the inlet 26 on the upper surface of the ladle body 20. Is completely closed by the cover plate 3. As a result, since a gap is prevented from being generated between the lid plate 3 and the ladle body 20, the storage space 21 is sealed well.

In addition, as a result of repeatedly supplying the molten metal to the ladle body 20, slag or the like adheres to the vicinity of the suction port 60 at the distal end of the hot water supply pipe 6, thereby increasing the weight on the distal end side of the hot water supply pipe 6. Even if it does, since the fixing member 80 which fixes the hot water supply pipe 6 is fixed so that it may be kept as horizontal as possible by the raising / lowering mechanism 4, the front-end | tip of the hot water supply pipe 6 sideways, etc. at the time of raising / lowering operation of the cover plate 3 etc. As a result, the tip of the hot water supply pipe 6 does not hit the side wall of the melting furnace 10 or the like to be damaged.

Moreover, even if the horizontal posture of the fixing member 80 is slightly collapsed and the hot water supply pipe 6 is slightly inclined toward the front end side due to the increase in the weight of the hot water supply pipe 6 due to the adhesion of slag or the like, the lid Since the plate 3 is not directly connected to the hot water supply pipe 6, the lid plate 3 does not tilt together with the hot water supply pipe 6. In this case, even if the fixing member 80 is slightly inclined, the lid plate 3 is supported by the fixing member 80 through the connecting member 81 so as to be swingable. The bottom surface of the lid plate 3 comes into surface contact with the top surface of the ladle body 20 by swinging in accordance with the ladle body 20. Therefore, also in this case, the inlet 26 on the upper surface of the ladle body 20 is completely blocked by the lid plate 3.

Thus, also in the vacuum hot water supply apparatus 1 ′ of the present embodiment, the inlet 26 on the upper surface of the ladle body 20 can be completely closed by the lid plate 3, and therefore, between the lid plate 3 and the ladle body 20. It is possible to seal the storage space 21 of the ladle body 20 satisfactorily without any gaps.

As mentioned above, although embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. For example, in this embodiment, the air lead-out pipe 27 for connecting the vacuum device 5 for depressurizing the storage space 21 is provided in the ladle body 20 of the molten metal transport ladle 2, but it is not necessarily limited to this. Instead, a pipe that communicates with the storage space 21 may be provided in the lid 3, and the vacuum device 5 may be connected to the pipe.

DESCRIPTION OF SYMBOLS 1 Vacuum hot water supply apparatus 2 Molten metal transfer ladle 3 Cover plate 4 Elevating mechanism 5 Vacuum apparatus 6 Hot water supply pipe 7 Support mechanism 8 Oscillation mechanism 20 Ladle main body 21 Storage space 26 Inlet 60 Suction port 70 Mounting base 71 Mounting stand 77 Rubber spring 78 Anti-vibration rubber 80 Fixing member 81 Connecting member 82 Seal member

Claims (8)

An apparatus for supplying molten metal to the storage space of the molten metal transport ladle having a ladle body having an injection port on the upper surface and having a molten metal storage space inside,
A lid plate that is supported so as to be movable up and down above the ladle body, and whose bottom surface is in contact with the top surface of the ladle body to close the inlet,
An elevating mechanism capable of moving the lid plate up and down;
A hot water supply pipe that penetrates the lid plate and communicates the inside and outside of the storage space to supply molten metal to the storage space;
A vacuum device for depressurizing the storage space and taking molten metal into the storage space from a suction port at a tip of the hot water supply pipe;
When the ladle body and the lid plate are in contact, the lower surface of the lid plate and the upper surface of the ladle body are brought into surface contact by oscillating the ladle body or oscillating only the lid plate. A vacuum hot water supply device comprising a swinging mechanism to obtain. The swing mechanism is
A fixing member for fixing the hot water supply pipe;
A coupling member that pivotably couples the lid plate to the fixing member,
The vacuum hot water supply apparatus according to claim 1, wherein the elevating mechanism supports the fixing member in a horizontal state and moves the fixing member up and down while maintaining its posture. Between the fixing member and the lid plate, there is provided a sealing member that is flexible and is provided so as to surround the hot water supply pipe and seals between the fixing member and the lid plate. The vacuum hot water supply device according to claim 2. The vacuum hot water supply apparatus according to claim 1, wherein the swing mechanism is a support mechanism that supports the ladle body so as to be swingable. The vacuum hot water supply device according to claim 4, wherein the elevating mechanism supports the lid plate in a horizontal state and moves the lid plate up and down while maintaining its posture. The support mechanism includes a mounting base fixed on a floor surface, one or a plurality of springs provided on the mounting base, and a mounting table on which the ladle body provided on the springs can be mounted. The vacuum hot water supply device according to claim 4, wherein the mounting table is supported in a tiltable state with respect to the mounting base by the elastic force of the spring. The support mechanism includes a mounting base fixed on a floor surface, a rubber plate provided on the mounting base, and a mounting table on which the ladle body provided on the rubber plate can be placed, The vacuum hot water supply apparatus according to claim 4, wherein the mounting table is supported by the elastic force of the rubber plate in a freely tilting state with respect to the mounting base. The vacuum hot water supply apparatus according to claim 6 or 7, wherein the mounting base is a lifter capable of moving up and down the mounting table.

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