JP3492675B1 - Transport vehicle, differential pressure control unit, and molten metal supply system - Google Patents

Abstract

To provide a technique capable of pressurizing a container with a stable pressure without impairing workability. SOLUTION: A transport vehicle that can hold molten metal and can transport a molten metal between the outside using a pressure difference and carries at least an engine for traveling. In the traveling or idling of the transport vehicle by the traveling engine, a generator driven by the engine, a gas compressor driven by electric power generated by the generator, and a gas compressor It is equipped with a tank that stores compressed gas. And provided at the tip of the air hose leading to the tank,
An interface unit detachable from the container was connected to the container, and the inside of the container was pressurized from the tank via an air hose so that the molten metal contained in the container was circulated to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier vehicle and a molten metal supply system used for supplying molten metal to a point of use such as a die cast machine.

[0002]

2. Description of the Related Art In a factory where a large number of die-casting machines are used to mold aluminum, the aluminum material is often supplied from outside the factory as well as inside the factory. In this case, the ladle containing the molten aluminum is transported from the material supply side factory to the molding side factory, and the material in the molten state is supplied to each die casting machine. .

The conventional ladle has a structure like a teapot in which a supply pipe is attached to the side wall of a container body in which molten metal is stored, and the ladle is tilted to form the pipe. The molten metal is supplied to the holding furnace.

However, in such a ladle, for example, the forklift is used to incline the ladle, and such work cannot always be said to be safe.
In addition, since it is necessary to install a turning mechanism on the forklift in order to tilt the ladle largely (tilt / rotate operation),
There is a problem that the construction is special and that a worker skilled in the operation of the forklift is required for such an operation.

Therefore, a system has been proposed in which molten metal is supplied to the holding furnace by applying pressure to the container. By adopting such a differential pressure type container, not only the safety and workability are improved, but also a more detailed supply service becomes possible (for example, refer to Patent Document 1).

[0006]

[Patent Document 1] Japanese Utility Model Laid-Open No. 3-31063 (Fig. 1).

[0007]

According to the above-mentioned Patent Document 1, pressurization in the container is performed by a charger mounted on a forklift.

However, the pressurization by the charger has a problem that the inside of the container cannot be pressurized with a stable pressure. However, since the technique according to Patent Document 1 could not be put to practical use in the end, the problem of "pressurizing the inside of the container with a stable pressure" does not occur, and the problem occurred in the process of development by the present inventors. It is completely new.

For the problem of "pressurizing the container with a stable pressure", for example, it is conceivable to use a pressurized gas supplied from a pipe in a factory. In that case, it is mounted on a forklift or the like. It becomes necessary to connect the container to the factory side by piping, which hinders workability.

Therefore, an object of the present invention is to provide a technique capable of pressurizing the inside of a container with a stable pressure without impairing such workability.

It is another object of the present invention to provide a compact and efficient molten metal supply system and method. In particular, it is an object of the present invention to provide a molten metal supply system and a supply method that use a small amount of pressurized gas and consume little energy. It is another object of the present invention to provide a molten metal supply system and a supply method which have a small number of times of supplying pressurized gas and have good workability.

[0012]

In order to solve such a problem, a carrier vehicle according to a main aspect of the present invention can contain molten metal and can distribute molten metal to the outside by utilizing a pressure difference. A carrier vehicle that holds and transports various containers, and that is equipped with at least an engine for traveling,
While the transport vehicle is traveling or idling by the traveling engine, a generator driven by the engine, a gas compressor driven by electric power generated by the generator, and a compression by the gas compressor And a tank for accumulating the stored gas, provided at the tip of an air hose leading to the tank, and an interface part that is detachable from the container is connected to the container, and from the tank via the air hose. The inside of the container is pressurized so that the molten metal contained in the container is circulated to the outside.

A transport vehicle according to another aspect of the present invention is a transport vehicle for holding and transporting a container capable of accommodating a molten metal and utilizing a pressure difference so that the molten metal can flow to and from the outside. The vehicle running engine, the generator driven by the engine, the gas compressor driven by the electric power generated by the generator, and the gas compressed by the gas compressor are accumulated. The present invention is characterized by including a tank and an interface part that is attachable to and detachable from the container, and a pressure adjusting part that pressurizes the inside of the container through the interface part.

In the present invention, for example, while the vehicle is running or idling, the generator mounted on the vehicle drives the generator, and the electric power generated by the engine drives the gas compressor to compress the compressed gas. Is accumulated in the tank. Then, an interface portion provided at the tip of an air hose leading to the tank is connected to the container, the inside of the container is pressurized from the tank via the air hose, and the molten metal contained in the container is circulated to the outside.

In the present invention, the gas is compressed by the gas compressor,
Since such gas is once stored in the tank, the tank acts as a buffer between the gas compressor and the container. Therefore, the inside of the container can be pressurized with a stable pressure. Further, since all the means for pressurizing are mounted inside the vehicle, they function independently as a device for pressurizing the vehicle. Therefore, for example, the labor and the like for connecting to the pipe into which the pressurized gas flows in the factory becomes unnecessary, and the workability is improved.

A transport vehicle according to another aspect of the present invention is a transport vehicle that holds and transports a container capable of containing molten metal and utilizing the pressure difference to allow the molten metal to flow to and from the outside. A motor for traveling the vehicle, a battery for supplying electric power to the motor, a gas compressor driven by the electric power of the battery, and a tank for accumulating gas compressed by the gas compressor. And a pressure adjusting unit for pressurizing the inside of the container through the interface unit.

That is, the present invention can be applied to an electrically driven or so-called hybrid carrier vehicle.

The transport vehicle according to the present invention may include a filter provided on a line between the gas compressor and the tank. The filter is preferably capable of trapping, for example, aluminum debris or water in the fluid. Such a filter normally prevents foreign matters from flowing into the container side. In particular, when the filter captures water, it becomes possible to supply a dry gas to the container side, and safety can be improved.

The transport vehicle according to the present invention comprises a first check valve which is provided on the line between the tank and the gas compressor and which restricts the flow of gas from the tank to the gas compressor. It may be further provided. By restricting the flow of gas from the tank to the gas compressor by the first check valve, pressure is not applied to the gas compressor from the tank side, and the load on the gas compressor can be reduced. Thereby, the gas compressor can be downsized. Further, the first check valve prevents foreign matter from flowing back to the gas compressor side. The first check valve is more preferably provided between the filter and the gas compressor. This prevents foreign matter from flowing into either the tank side or the gas compressor side.

In the transport vehicle according to the present invention, the means for measuring the pressure in the tank and the start / stop of the gas compressor are controlled in accordance with the measured pressure, and before the gas compressor is started. In addition, a control means for releasing the pressure between the gas compressor and the first check valve to the atmospheric pressure may be further provided.

For example, the pressure switch has a function as the above-mentioned measuring means and control means.

By controlling the start and stop of the gas compressor according to the pressure in the tank, the pressure in the tank can be kept constant. Thereby, the inside of the container can be pressurized with a stable pressure. Further, before starting the gas compressor, that is, before starting the gas compressor, the space between the gas compressor and the first check valve is released to the atmospheric pressure, so that the gas compressor can be made smaller. It can be started with power. That is, when trying to start the gas compressor from a state where pressure is applied to the gas compressor, the gas compressor needs an initial power to withstand it, and as a result,
This leads to an increase in the size of the gas compressor. On the other hand, in the present invention, since the power at the time of starting can be reduced, the gas compressor can be downsized. For example, the control means comprises at least one valve, one of which is connected to atmospheric pressure and the other of which is connected to a line between the first check valve and the gas compressor. Thus, the above-mentioned function of opening to the atmosphere can be realized.

In the transport vehicle according to the present invention, it is preferable that the container has an openable and closable hatch on the upper surface thereof, and that the interface section is attachable to and detachable from the hatch.

In the present invention, since the interface portion is attachable to and detachable from the hatch, it is possible to confirm the adhesion of the metal to the mounting position of the interface portion on the back surface of the hatch every time the molten metal is supplied into the container. Therefore, it is possible to prevent clogging of the relevant part.

A transport vehicle according to another aspect of the present invention is
A carrier vehicle for holding and transporting a container capable of accommodating a molten metal and utilizing a pressure difference to allow the molten metal to flow to and from the outside, the gas compressor being compressed by the gas compressor. A tank for accumulating gas, an interface part that is attachable to and detachable from the container at one end, and an air hose leading to the tank, and a first leak valve connected between the tank and the interface part, The first
And a filter provided between the leak valve and the interface section.

Here, a second leak valve connected between the first leak valve and the interface portion is further provided, and the filter is provided between the second leak valve and the air hose. It is preferable to provide.

In the present invention, by connecting such a valve between the tank and the interface portion, it is possible to prevent damage and deterioration of these valves and the like due to heat and the like, and it is possible to safely handle the molten metal. Further, since it is not necessary to provide these valves and the like for each container, the number of parts of the container can be reduced. In addition, in the present invention, by providing the filter between the first leak valve and the interface section, it is possible to prevent the first leak valve from being clogged with foreign matter flowing out from the container side. Therefore, pressure leakage can be prevented.
Further, more preferably, by providing a filter, for example, a strainer immediately before the first leak valve, the pressure leak can be prevented more effectively.

A transport vehicle according to another aspect of the present invention is a transport vehicle that holds and transports a container capable of containing molten metal and allowing molten metal to flow to and from the outside by utilizing a pressure difference. A gas compressor, a tank for accumulating the gas compressed by the gas compressor, a vacuum pump, an air hose having an interface part detachable from the container at one end, and a flow path leading to the tank. It is characterized by comprising a switching section for switching between a flow path leading to the vacuum pump and a pipe between the switching section and the other end of the air hose.

In the present invention, the vacuum pump, which is a means for reducing the pressure, is also mounted in the vehicle, so that the vehicle independently functions as a device for applying pressure and reducing pressure. Therefore, for example, not only the connection with the pipe into which the pressurized gas flows in the factory but also the connection with the vacuum system pipe becomes unnecessary. That is, the molten metal can be independently introduced into the container from the outside by the vehicle and the container, and the molten metal can be led out from the container to the outside. Further, in the present invention, since the air hose is commonly used for pressurization and depressurization, the number of parts can be reduced.

The transport vehicle according to the present invention comprises a first leak valve connected between the tank and the interface section, and a filter provided between the first leak valve and the interface section. It is more preferable to further include Further, the transport vehicle according to the present invention,
It is preferable to further include a second leak valve connected between the switching unit and the other end of the air hose, and a filter provided between the second leak valve and the air hose. .

A pressure difference control unit according to still another aspect of the present invention is a vehicle for holding and transporting a container capable of accommodating a molten metal and utilizing the pressure difference to allow the molten metal to flow to and from the outside. In the pressure difference control unit mounted on, a gas compressor, a tank for accumulating the gas compressed by the gas compressor, and an interface part detachable from the container are provided, and the compressed gas is supplied through the interface part. And a pressure adjusting unit for pressurizing the inside of the container.

By mounting the pressure difference control unit according to the present invention on a carrier vehicle such as a forklift and using the container as described above, the inside of the container can be pressurized with a stable pressure without impairing workability.

The pressure difference control unit according to the present invention can adopt the same structure as described above.

That is, a filter provided on the line between the gas compressor and the tank is provided, and a filter provided on the line between the tank and the gas compressor,
Further comprising a first check valve for restricting a flow of gas from the tank to the gas compressor, wherein the first check valve is provided between the filter and the gas compressor. Further comprising a second check valve provided on the line so as to sandwich the filter with the first check valve, means for measuring the pressure in the tank, and the measurement. Control means for controlling the start / stop of the gas compressor according to the pressure and for releasing the space between the gas compressor and the first check valve to atmospheric pressure before the gas compressor is started. The control means further comprises at least one valve, one of which is connected to atmospheric pressure and the other of which is connected to a line between the check valve and the gas compressor. Things like that.

In the pressure difference control unit of the present invention, it is preferable that the gas compressor is driven by a single layer power. As a result, the power supply system can be made smaller than the three-phase system.

A molten metal supply system according to another aspect of the present invention uses a container capable of containing the molten metal and allowing the molten metal to flow to and from the outside by utilizing a pressure difference, and the container is forked by a forklift. A system for supplying the molten metal contained in the container to the point of use by a pressure difference without substantially inclining, by detachably holding and carrying the container to the point of use, holding the container by a forklift, The forklift includes a generator (or a battery in the case of a motor-driven vehicle) driven by the engine while the forklift is traveling or idling by a traveling engine mounted on the forklift, and the generator generates electricity. Gas pressure driven by the generated power or the power supplied from the battery Equipped with a machine and a tank for accumulating gas compressed by the gas compressor, provided at the tip of an air hose leading to the tank, and connecting to the container an interface part detachable from the container, The inside of the container is pressurized from the tank via the air hose, and the molten metal contained in the container is supplied to a use point.

According to the present invention, it is possible to discharge molten metal from a container at a point of use with good workability and stable discharge (no gas ejection, etc.).

Further, according to the present invention, a container capable of containing a molten metal and utilizing the pressure difference to distribute the molten metal to the outside is used, and the container is detachably held by a forklift to hold the container. A method of supplying molten metal, which is carried to a point of use, holds the container by a forklift, and supplies the molten metal contained in the container to the point of use by a pressure difference without substantially tilting,
The forklift includes a generator driven by the engine or a battery (for example, in the case of a motor-driven vehicle) driven by the engine while the forklift is running or idling by the running engine mounted on the forklift, and the generator generates power. A gas compressor driven by the generated electric power or the electric power supplied from the battery and a tank for accumulating the gas compressed by the gas compressor are mounted, and are provided at the tip of an air hose leading to the tank. An interface part that is detachable from the container is connected to the container, the inside of the container is pressurized from the tank via the air hose, and the molten metal contained in the container is supplied to a use point. It is characterized by

In the case of such a transportation vehicle, whether it is driven by an engine or a motor, a compressor provided,
The vacuum pump is preferably small. Providing a large generator or vacuum pump increases the load on the engine and poses a problem in terms of installation space. Further, in the case of a motor-driven vehicle using a battery, the traveling distance becomes shorter as the power consumption increases.

In such a case, for example, the diameter of the flow path through which the molten metal flows (including the piping, whether it is the flow path inside the container or the flow path outside the container, and not necessarily having the same diameter over the entire length) is 50 mm. It is preferable, necessary, and indispensable to use a container having a larger size and a smaller size than 80 mm (further preferably, the size is set to about 60 to 75 mm). If such a container is used, the pressure at the time of feeding the molten metal can be reduced, so that the capacity of the compressor provided can be reduced and the power consumption can be reduced.

Now, a carrier vehicle according to another aspect of the present invention will be described. Although the present invention described above includes a tank, a blower capable of generating a predetermined pressure may be adopted instead of the tank as a pressure source for the container. When a compact transport vehicle is required due to problems such as the size of the transport vehicle and the problem of space in the traveling place, it is preferable to use a blower instead of the tank. The transport vehicle of the present invention according to this aspect is capable of containing a molten metal and transports the molten metal while holding a container capable of flowing the molten metal with the outside by utilizing a pressure difference. A transport vehicle equipped with a running engine,
While the transport vehicle is traveling or idling by the traveling engine, the generator driven by the engine and the blower driven by the electric power generated by the generator are installed, and the air communicating with the blower is installed. An interface part detachable from the container provided at the tip of the hose is connected to the container, and the inside of the container is pressurized by the blower via the air hose.
The molten metal housed in the container is supplied to the outside. It can also contain molten metal,
A transportation vehicle for holding and transporting a container capable of flowing molten metal between the outside by utilizing a pressure difference, a motor for running the vehicle, and a battery for supplying electric power to the motor. And a blower driven by the electric power of the battery, and an interface part detachable from the container, and a pressure adjusting part for pressurizing the inside of the container by the blower through the interface part. .

By adopting such a structure, a pressure tank may be unnecessary or a small capacity may be used. Of course, the blower and the tank may be used together.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a metal supply system according to an embodiment of the present invention. As shown in the figure, the first factory 10 and the second factory 2
For example, 0 is provided at a place distant from the public road 30.

In the first factory 10, a plurality of die cast machines 11 as use points are arranged.
Each die-casting machine 11 uses molten aluminum as a raw material, and molds a product in a desired shape by injection molding. Examples of the product include parts related to automobile engines, missions, and the like. Further, the molten metal may be not only an aluminum alloy but also an alloy mainly composed of another metal such as magnesium or titanium. A holding furnace (hand-holding furnace) 12 for temporarily storing molten aluminum before shot is arranged near each die-casting machine 11. Molten aluminum for a plurality of shots is stored in the holding furnace 12, and the holding furnace 12 is held for each shot via the ladle 13 or a pipe.
The molten aluminum is injected into the die-casting machine 11 from. In addition, in each holding furnace 12,
A liquid level detection sensor (not shown) for detecting the liquid level of the molten aluminum stored in the container and a temperature sensor (not shown) for detecting the temperature of the molten aluminum are arranged. The detection results of these sensors are transmitted to the control panel of each die cast machine 11 or the central control unit 16 of the first factory 10.

The container 100 received by the receiving section of the first factory 10 is delivered to a predetermined die casting machine 11 by a forklift 40 which is a dedicated vehicle according to the present invention, and molten aluminum is transferred from the container 100 to the holding furnace 12. It is being supplied. The container 100 after the supply is returned to the receiving portion by the forklift 40.

The first factory 10 is provided with a first furnace 19 for melting and supplying aluminum to the container 100, and the container 100 to which the molten aluminum is supplied by the first furnace 19 is also provided. It is designed to be delivered to a predetermined die-casting machine 11 by a forklift 40.

The first factory 10 is provided with a display section 15 for displaying the need for additional molten aluminum in each die-casting machine 11.
More specifically, for example, a unique number is assigned to each die-casting machine 11, and the number is displayed on the display unit 15, which corresponds to the number of the die-casting machine 11 in which molten aluminum needs to be added. The number on the display unit 15 is turned on. The operator uses the forklift 40 based on the display on the display unit 15 to set the container 100 to the die cast machine 1 corresponding to the number.
Brought to 1 and supplied molten aluminum. The display on the display unit 15 is performed by the control of the central control unit 16 based on the detection result of the liquid level detection sensor.

The second factory 20 is provided with a second furnace 21 for melting aluminum and supplying it to the container 100. As the container 100, a plurality of types having different capacities, pipe lengths, heights, widths, etc. are prepared. For example, there are a plurality of types having different capacities depending on the capacity of the holding furnace 12 of the die-casting machine 11 in the first factory 10. The container 100 to which the molten aluminum has been supplied by the second furnace 21 is placed on the transportation truck 32 by a forklift, which is a dedicated vehicle of the present invention. That is, the carrier vehicle of the present invention can be used in both the first factory and the second factory. The truck 32 carries the container 100 through the public road 30 to the receiving part of the first factory 10. Further, the empty container 100 in the receiving portion is designed to be returned to the second factory 20 by the truck 32.

The second factory 20 is provided with a display section 22 for displaying the need for addition of molten aluminum in each die-casting machine 11 of the first factory 10. The configuration of the display unit 22 is almost the same as that of the display unit 15 arranged in the first factory 10. The display on the display unit 22 is performed by the control of the central control unit 16 in the first factory 10 via the communication line 33, for example. In addition, in the display unit 22 in the second factory 20, it was determined that the molten aluminum was supplied from the first furnace 19 in the first factory 10 of the die-casting machine 11 requiring the supply of molten aluminum. The die cast machine 11 is displayed separately from the other die cast machines 11. For example, the number corresponding to the die-casting machine 11 thus determined blinks. As a result, it is possible to prevent the molten aluminum from being erroneously supplied from the second factory 20 side to the die-casting machine 11 determined to be supplied with the molten aluminum from the first furnace 19. In addition to the above, the display unit 22 also displays the data transmitted from the central control unit 16.

Next, the operation of the metal supply system configured as described above will be described.

The central control unit 16 monitors the amount of molten aluminum in each holding furnace 12 via the liquid level detection sensor provided in each holding furnace 12. Here, when it becomes necessary to supply molten aluminum to a holding furnace 12, the central control unit 16 detects the “unique number” of the holding furnace 12 by a temperature sensor provided in the holding furnace 12. "Temperature data" of the holding furnace 12, the holding furnace 12
"Morphological data" regarding the morphology, final "time data" of molten aluminum disappearing from the holding furnace 12, "traffic data" of the public road 30, "quantity data" of molten aluminum required in the holding furnace 12 and " The temperature data ”and the like are transmitted to the second factory 20 side via the communication line 33. In the second factory 20, these data are displayed on the display unit 22. Based on these displayed data, the operator empirically finds that the container 100 reaches the holding furnace 12 immediately before the molten aluminum runs out of the holding furnace 12, and the molten aluminum at that time reaches a desired temperature. The shipping time of the container 100 from the factory 20 and the temperature at the time of shipping the molten aluminum are determined. Alternatively, these data are loaded into, for example, a personal computer (not shown), the container 100 reaches the holding furnace 12 immediately before the molten aluminum runs out from the holding furnace 12 using a predetermined software, and the molten aluminum at that time has a desired temperature. Therefore, the shipping time of the container 100 from the second factory 20 and the temperature at the time of shipping the molten aluminum may be estimated and the time and temperature may be displayed. Alternatively, the temperature of the second furnace 21 may be automatically controlled according to the estimated temperature. The amount of molten aluminum to be contained in the container 100 may also be determined based on the above “quantity data”.

Truck 3 with container 100 placed at the time of shipment
When 2 starts and arrives at the first factory 10 through the public road 30, the container 100 is received from the truck 32 in the receiving section.

Thereafter, the received container 100 is transferred to the predetermined die-casting machine 1 by the forklift 40.
1, and molten aluminum is supplied from the container 100 to the holding furnace 12.

FIGS. 2 and 3 are views showing the construction of the forklift (transportation vehicle) 40 and the container (pressurized molten metal supply container) 100 used in such a system.

The container 100 has a closed structure capable of pressurizing and depressurizing through a pressurizing and depressurizing hole (port).
Then, the container 10 is provided through the pipe 44 of the container 100.
The molten metal is circulated inside and outside of zero. That is, when the inside of the container 100 is pressurized through the hole, the molten aluminum stored in the container 100 is led to the outside, for example, the holding furnace 12 side through the pipe 44, and the inside of the container 100 is depressurized through the hole. External molten aluminum is introduced into the container 100 through the pipe 44.

Further, on the back surface of the container 100, an engaging portion (a pair of channel members) 45 having a concave shape with which the fork 51 of the forklift 40 is engaged is provided. By having such an engaging portion 45, the container 100 can be attached to and detached from the forklift 40.

The forklift 40 has an elevating mechanism 52 for elevating the container 100 by elevating the fork 51. A load cell 53 as a weight measuring unit is arranged on the surface of the fork 51.

Above the driver's seat 54 of the forklift 40, a receiver tank 71 as a pressurized gas storage tank for supplying pressurized gas, for example, pressurized air to the container 100, and gas is supplied to this receiver tank 71. An air compressor 203 and a vacuum pump 72 for reducing the pressure inside the container 100 are mounted.

Such pressurization and depressurization in the container 100 connects the forklift 40 and the container 100 with the air hose 57, and the forklift 4 is connected via the air hose 57.
Gas is pressure-fed in the container 100 from the 0 side, and conversely the container 1
This is performed by sucking gas from inside 00. By using the flexible air hose 57, even if the forklift 40 is moved up and down, the air hose 57 follows this up-down movement so that the connection failure with the container 100 does not occur.

One end of the air hose 18 is attachable to and detachable from one end of the pipe 66 led out from the hole 41 of the container 100. This allows one forklift 40 to be compatible with a plurality of containers 100 in combination with the fact that the container 100 is detachable from the forklift 40.

FIG. 4 is a diagram showing the structure of the pressurizing / depressurizing system between the forklift 40 and the container 100. As shown in FIG. 4, the forklift 40 includes a generator (dynamo) 202 driven by the engine 201 and a generator 20 at least while the forklift 40 is traveling or idling by the traveling engine 201.
The air compressor 203 driven by the electric power generated by 2 is mounted. Although a vehicle equipped with an engine will be described here, in the case of a vehicle driven by a motor, the air compressor 203 is driven by the electric power supplied from the battery.

The gas compressed by the air compressor 203 is stored in the receiver tank 71. That is, the compressed gas is temporarily accumulated in the receiver tank 71 from the air compressor 203 while the forklift 40 is traveling or idling. Therefore, the receiver tank 71 plays a role as a buffer between the air compressor 203 and the container 100. Therefore, when the molten metal is supplied from the container 100 to the outside, the inside of the container 100 can be pressurized with a stable pressure. Such stable pressurization of the inside of the container 100 is very important according to the knowledge of the present inventors. If the pressure is unstable when pressurizing the inside of the container 100, the molten metal containing the gas may be suddenly ejected from the tip of the pipe 44 of the container 100, and the molten metal may be scattered around. Because. Further, by providing the receiver tank 71, the capacity of the air compressor 203 may be small. Therefore, it becomes possible to use an air compressor with low power consumption and small size.

Compressor 203 and receiver tank 71
A first check valve 205, a line filter 206, an air dryer 207, and a second check valve 208 are provided in this order from the compressor 203 side on a pipe 204 between and.

The first check valve 205 prevents backflow of gas from the side of the line filter 206 and the air dryer 207 to the compressor 203, for example, when the compressor 203 is stopped, and is provided especially near the line filter 206. Is preferred. Thereby, the pipe 204 between the compressor 203 and the line filter 206
The dirt and clogging of a can be prevented more effectively.

The line filter 206 is the compressor 2
03 is a filter for removing water drops and oil from the gas sent to the receiver tank 71. Air dryer 20
Reference numeral 7 is a filter for drying the gas sent from the compressor 203 to the receiver tank 71. The second check valve 208 extends from the receiver tank 71 to the compressor 20.
This is to prevent the backflow of gas to the No. 3. A pressure switch 209 is connected on the pipe 204b between the receiver tank 71 and the second check valve 208.

The pressure switch 209 is a pressure sensor 209a.
And a CPU 209b. The pressure sensor 209a is
The pressure in the receiver tank 71 is detected, and on / off of the compressor 203 is controlled based on the detection result. For example, the compressor 203 is turned on when the pressure in the receiver tank 71 is below a predetermined value, and conversely when the pressure in the receiver tank 71 is above a predetermined value.
The drive of 03 is stopped.

A pipe 204a between the compressor 203 and the first check valve 205 has a pipe 2 for opening to the atmosphere.
04c is connected. One end of the pipe 204c is open to the atmosphere via a relief valve 204d. Opening and closing of the relief valve 204d is controlled by the CPU 209b of the pressure switch 209.

The CPU 209b closes the relief valve 20 prior to turning on the compressor 203 when the pressure in the receiver tank 71 falls below a predetermined value.
4d is opened. As a result, the compressor 203
And the inside of the pipe 204a between the first check valve 205 and the first check valve 205 becomes atmospheric pressure. After that, the CPU 209b sets the compressor 20
3 is turned on, and the relief valve 204d, which is in the open state, is closed after the elapse of a predetermined time. Pipe 204
By temporarily returning the inside of a to atmospheric pressure, the compressor 20
It is possible to start 3 with less power,
The compressor 203 can be downsized, and the power supply of the transport vehicle can be used more effectively.

In the system of the present embodiment, the pipe diameter upstream of the receiver tank 71 is about 2/3 of the pipe diameter downstream of the receiver tank 71 (closer to the container 100). This is because a large amount of gas is pumped from the receiver tank 71 to the container 100 at one time, while the gas is gradually sent from the compressor 203 to the receiver tank 71. That is, the flow rate of gas greatly differs between the receiver tank 71 and the container 100 and between the compressor 203 and the receiver tank 71. Further, in the present embodiment, the line filter 206 and the air dryer 207 are provided not on the downstream side of the receiver tank 71 but on the upstream side of the receiver tank 71, that is, the pipe 2 between the receiver tank 71 and the compressor 203.
The line filter 206 and the air dryer 207 can be miniaturized by being provided on 04, that is, by being provided on the narrow side of the pipe.

In the forklift 40 of this embodiment, a vacuum pump 72 for reducing the pressure inside the container 100 is installed adjacent to the receiver tank 71. A connection mechanism 73 is provided on the container 100 side of the air hose 57 as an interface unit for connecting to the container 100.

The receiver tank 71 is a pipe 49 for pressurized gas.
The pressurized gas pipe 49a is connected to the switching valve 80. Similarly, the vacuum pump 72 is also connected to the vacuum pipe 49b, and the vacuum pipe 49b is connected to the switching valve 80. The switching valve 80 is
The connection between the air hose 57 and the pressurized gas pipe 49a and the connection between the air hose 57 and the vacuum pipe 49b are switched.

The switching valve 80 includes a pressure gauge 84, a relief valve 86a, a leak valve 86b, and an emergency stop portion 86.
Air hose 5 in this order through c and filter 81
7 and the other end of the air hose 57 is connected to the pipe 66 on the container 100 side by the connection mechanism 73.

The attachment / detachment of the air hose 57 to / from the container 100 is performed by attaching / detaching the connection mechanism 73 to / from the container 100. This air hose 57
By making the pipe flexible, the air hose 57 can be easily attached to and detached from the pipe 66 regardless of the direction of the pipe 66 provided in the hole of the container 100. As the material of the air hose 57 for making it flexible, for example, synthetic resin such as rubber or metallic material can be used. Further, a heat resistant material is used because it is close to the high temperature container 100. Is preferred.

An electronic pressure control valve 58 and a leak valve 82 are connected to the pressurized gas pipe 49a from the receiver tank 71 side (upstream side). An electronic pressure control valve 58 and a leak valve 93 are connected to the vacuum pipe 49b from the vacuum pump 72 side (downstream side).

Each electronic pressure control valve 58 is
The pressures in the pressurized gas pipe 49a and the vacuum pipe 49b are adjusted, and the respective pipes 49a and 4 are adjusted.
The communication and disconnection (on / off) of 9b are also performed.

The filter 81 prevents dust, dust, etc. from being sent from the container 100 side to the filters and the emergency stop portion 86c. Such a problem remarkably occurs when the supply of the molten metal is stopped (when the pressurized state is returned to the atmospheric pressure). Although it is conceivable to provide such a filter on the container 100 side, it is necessary to provide a filter for each container 100. In the present invention, by providing such a filter 81 on the forklift side, it is possible to reduce the number of filters required and the maintenance labor.

According to the knowledge of the present inventors, the container 1 is compared with the amount of dust and the like from the receiver tank 71 side to the container 100 side.
The amount of dust and the like from the 00 side to the receiver side is very large. In the present embodiment, in particular, by providing such a filter 81 on the downstream side of the filters and the emergency stop portion 86c, it is possible to prevent the filters and the emergency stop portion 86c from being clogged with dust or the like sent from the container 100 side. Can be prevented. However, it goes without saying that the filter 81 may be arranged upstream of this. For example, the filter 81 may be provided between the switching valve 80 and the relief valve 86, and the filter 81 may be provided between the switching valve 80 and the leak valve 82.

The pressure control valve 58 and the valves are electronically controlled by an electric control panel (not shown), and the pressure in the container 100 is controlled by operating a hand operation panel (not shown). The difference can be adjusted.

FIG. 18 is a diagram for explaining another example of the present invention. In this example, the compressor 203 is used as a pressure source.
Instead, the blower 203b is used, and the pressurized gas is supplied to the container 100 side without using the receiver tank 71. Therefore, the pressure unit can be made compact. When the forklift is a battery vehicle, the blower 203b may be powered by the battery.

FIG. 5 is a view showing a preferable mode of the leak valve 82. As shown in FIG. 5, in this embodiment, the strainer 220 is inserted immediately before the leak valve 82. As shown in FIG. 6, when such a strainer is not inserted, foreign matter 221 such as an aluminum piece or a refractory material from a container or the like is caught in the leak valve 82, the valve does not close, and the pressure is reduced. Leakage may occur or the supply of molten metal may be interrupted. On the other hand, in this embodiment, since the strainer 220 is inserted,
Such pressure leakage is prevented and a safe supply stop operation can be realized.

Next, a container (pressurized molten metal supply container) 100 suitable for the system configured as described above will be described.
A description will be given based on FIGS. 7 and 8. 7 is a sectional view of the container 100, and FIG. 8 is a plan view thereof.

In the container 100, a large lid 152 is arranged in an upper opening 151 of a cylindrical main body 150 having a bottom. Flanges 15 are provided on the outer circumferences of the main body 150 and the large lid 151, respectively.
3, 154 are provided, and the main body 150 and the large lid 151 are fixed by tightening bolts 155 between these flanges. The main body 150 and the large lid 151 are, for example, made of metal on the outside and made of a fireproof material on the inside, and a heat insulating material is interposed between the metal and the fireproof material on the outside.

At one place on the outer periphery of the main body 150, the main body 15
A pipe mounting portion 158 provided with a flow path 157 that communicates with the pipe 44 from the inside is provided.

Here, FIG. 9 shows the pipe mounting portion 1 shown in FIG.
FIG. 58 is a cross-sectional view taken along the line AA of 58.

As shown in FIG. 9, the outside of the container 100 is made of a metal frame 100a and the inside is made of a refractory material (first lining) 100b, and a space between the frame 100a and the refractory material 100b is higher than that of the refractory material. A heat insulating material (second lining) 100c having a small thermal conductivity is inserted.
The flow path 157 is formed in the refractory material 100b provided inside the container 100. That is, the flow path 1
57 is located in the refractory material 100b from a position near the bottom of the container 100 to the exposed portion of the refractory material 100b on the upper surface side of the container 100. Thereby, the flow path 157 is separated from the inside of the container by the refractory member having a large thermal conductivity. By adopting such a configuration, heat radiation from the inside of the container is easily transmitted to the flow path. A heat insulating material is arranged outside the refractory member outside the flow path (on the side opposite to the inside of the container). As the refractory material, one having higher density and higher thermal conductivity than the heat insulating material is used.
Examples of the refractory material include dense refractory ceramic materials. Further, examples of the heat insulating material include heat insulating caster, board material, and other heat insulating ceramic materials.

The flow path 157 in the pipe mounting portion 158 is
It extends toward an upper part 157b on the outer circumference of the main body 150 through an opening 157a provided on the inner circumference of the main body 150 near the bottom 150a of the container main body. This pipe mounting part 15
The pipe 44 is fixed so as to communicate with the flow path 157 of No. 8. The pipe 44 has an inverted U-shape (a shape having a curvature)
Corresponding to this, the flow path in the pipe 44 is also inverted U
It has a V shape (a shape having a curvature), whereby the one end port 159 of the pipe 44 faces downward. The pipe 44 having such a shape allows the molten metal to flow smoothly. That is, if there is a discontinuous surface inside the pipe, the molten metal tends to flow to hit the position, the position is eroded, and finally there is a problem such as a hole. On the other hand, if the flow path of the pipe has a shape with a curvature, there is no discontinuous surface, and the above problems do not occur.

The heat insulating member 4 is provided around the pipe 44 in the vicinity of the pipe mounting portion 158 so as to surround the pipe 44.
4a is provided. As a result, it is possible to suppress the temperature of the flow channel 157 from being lowered as much as possible by the heat of the flow channel 157 on the side of the pipe 44. Especially, the pipe mounting part 15
In the vicinity of the pipe mounting portion 158, the molten metal is likely to be solidified around the pipe 44 in the vicinity of 8 because the molten metal is easily cooled and the liquid surface is just shaken when the container is conveyed. By surrounding the circumference of the pipe 44 with the heat insulating member 44a, it is possible to prevent the molten metal from solidifying at this position.

The inner diameters of the flow path 157 and the pipe 44 that follows the flow path 157 are substantially equal to each other, and preferably about 65 mm to 85 mm. Conventionally, the inner diameter of this type of pipe has been about 50 mm. This is because it was thought that when the pressure was more than that, a large pressure was required when the molten metal was discharged from the pipe by pressurizing the inside of the container. On the other hand, the present inventors
7 and the inner diameter of the pipe 44 following this is 50 mm
It has been found that it is preferably about 65 mm to 85 mm, more preferably about 65 mm to 80 mm, and further preferably 65 to 70 mm. That is, when the molten metal flows upward in the flow path or the pipe, two parameters, the weight of the molten metal itself existing in the flow path or the pipe and the viscous resistance of the inner wall of the flow path or the pipe, affect the flow of the molten metal. It is considered that it has a great influence on the resistance to be hindered. Here, when the inner diameter is smaller than 65 mm, the molten metal flowing in the flow path is affected by both the weight of the molten metal itself and the viscous resistance of the inner wall at any position. A region that is hardly affected by the viscous resistance of the inner wall begins to occur from the vicinity, and the region gradually increases. The effect of this region is so great that the resistance to the flow of molten metal begins to drop. When the molten metal is discharged from the container, it is sufficient to pressurize the container with a very small pressure. In other words, conventionally, the influence of such a region is not taken into consideration at all, and only the weight of the molten metal itself is considered as a variable factor of the resistance that obstructs the flow of the molten metal, and for reasons such as workability and maintainability. Inner diameter 50
It was about mm. On the other hand, when the inner diameter exceeds 85 mm, the weight of the molten metal itself becomes very dominant as the resistance to obstruct the flow of the molten metal, and the resistance to obstruct the flow of the molten metal becomes large. According to the results of trial production by the present inventors, an inner diameter of about 65 mm to 80 mm is sufficient to press the pressure inside the container with a very small pressure, and particularly 70
mm is most preferable from the viewpoint of standardization and workability. That is, the pipe diameters are 50 mm, 60 mm, 70 mm and 10 m.
This is because it is standardized in units of m, and the smaller the pipe diameter, the easier and lighter the workability is.

The opening 1 is provided in the center of the large lid 152.
60 is provided, and a hatch 162 to which a handle 161 is attached is arranged in the opening 160. Hatch 16
2 is provided at a position slightly higher than the upper surface of the large lid 152. The hatch 162 is attached to the large lid 152 via a hinge 163 at one location on the outer periphery of the hatch 162. Thereby, the hatch 162 can be opened and closed with respect to the opening 160 of the large lid 152. Further, bolts 164 with a handle for fixing the hatch 162 to the large lid 152 are attached at two positions on the outer periphery of the hatch 162 so as to face the position where the hinge 163 is attached. Large lid 1
The hatch 162 is closed by closing the opening 160 of the 52 with the hatch 162 and rotating the bolt 164 with a handle.
It will be fixed to 52. Further, the bolt 164 with a handle can be reversely rotated to release the fastening and the hatch 162 can be opened from the opening 160 of the large lid 152. Then, with the hatch 162 open, maintenance of the inside of the container 100 and insertion of a gas burner at the time of preheating are performed through the opening 160.

A through hole 165 for adjusting the internal pressure for depressurizing and pressurizing the inside of the container 100 is provided at the center of the hatch 162 or at a position slightly deviated from the center. A piping 66 for pressurization and depressurization is connected to the through hole 165. The pipe 66 extends upward from the through hole 165, bends at a predetermined height, and extends horizontally from there. The surface of the insertion portion of the pipe 66 into the through hole 165 is threaded, while the through hole 165 is also threaded, whereby the pipe 66 is fixed to the through hole 165 by screwing. It is supposed to be done. Further, the pipe 66 may be attached so as to be rotatable and removable by a quick coupler composed of a socket and a plug.

A pressurizing or depressurizing pipe 167 can be connected to one of the pipes 66, and a tank accumulating in pressurized gas or a pressurizing pump is connected to the pressurizing pipe. A pressure reducing pump is connected to the pressure reducing piping. Then, it is possible to introduce the molten aluminum into the container 100 through the pipe 44 and the flow path 157 by utilizing the pressure difference by depressurization, and by using the pressure difference by pressurizing the flow path 157 and the pipe 44. Through the container 100
Molten aluminum can be discharged to the outside. By using an inert gas such as nitrogen gas in addition to air as the pressurized gas, it is possible to more effectively prevent the oxidation of the molten aluminum during pressurization.

In this embodiment, the hatch 162 arranged substantially in the center of the large lid 152 is provided with the pressurizing / depressurizing through hole 165, while the pipe 66 is pulled out in the horizontal direction. The work of connecting the pressurizing or depressurizing pipe 167 to the above-mentioned pipe 66 can be performed safely and easily. Further, since the pipe 66 can be rotated with a small force with respect to the through hole 165 by extending the pipe 66 in this manner, it is extremely difficult to fix or remove the pipe 66 screwed to the through hole 165. It can be performed with very little force, for example without using tools.

At a position slightly offset from the center of the hatch 162 and facing the above-mentioned pressurizing / depressurizing through hole 165,
A through hole 168 for releasing pressure is provided, and a relief valve (not shown) can be attached to the through hole 168 for releasing pressure. Thereby, for example, when the pressure inside the container 100 becomes equal to or higher than a predetermined pressure, the inside of the container 100 is opened to the atmospheric pressure from the viewpoint of safety. Such a relief valve may be provided on the transportation vehicle side of the air hose, for example, on the pressure adjusting section. This protects the relief valve from heat and improves reliability.

In the large lid 152 to the hatch 162, two through holes 170 for liquid level sensors, into which two electrodes 169 as liquid level sensors for molten metal are respectively inserted, are arranged at predetermined intervals. An electrode 169 is inserted into each of these through holes 170. These electrodes 169 are arranged so as to face each other in the container 100, and the tips of the electrodes 169 extend to, for example, substantially the same position as the maximum liquid level of the molten metal in the container 100. Then, the maximum liquid level of the molten metal in the container 100 can be detected by monitoring the conduction state between the electrodes 169, so that the excessive supply of the molten metal to the container 100 can be more reliably prevented. It has become.

On the bottom surface of the bottom of the main body 150, for example, legs 45 of a predetermined length having a mouth shape in cross section into which a fork (not shown) of a forklift is inserted are arranged so as to be parallel to each other.
Book is arranged. In addition, the bottom of the inside of the main body 150 is entirely inclined so that the flow path 157 side becomes lower. As a result, when the molten aluminum is discharged to the outside through the flow path 157 and the pipe 44 by pressurization, the so-called hot water residue is reduced. Also, for example, at the time of maintenance, the container 1
When the molten aluminum is led out to the outside via the flow path 157 and the pipe 44 by tilting 00, the angle at which the container 100 is tilted can be made smaller, and the safety and workability are excellent.

As described above, in the container 100 according to this embodiment, a member such as a stalk exposed to the molten metal in the container 100 is not necessary, and it is not necessary to replace a component such as a stalk. Further, since a member such as a stalk that hinders preheating is not arranged in the container 100, workability for preheating is improved and preheating can be efficiently performed. In addition, after the molten metal is stored in the container 100, it is often necessary to scoop out oxides and the like on the surface of the molten metal. This work is difficult if there is stalk inside,
Since there is no structure such as stalk inside the container 100, workability can be improved. Further, since the flow path 157 is configured to be included in the refractory material 100b having high thermal conductivity, the heat in the container 100 is easily transferred to the flow path 157 (see particularly FIG. 10). Therefore, the temperature drop of the molten metal flowing through the flow path 157 can be suppressed as much as possible.

Further, in the container 100 according to this embodiment,
Since the hatch 162 is provided with a through hole 165 for adjusting the internal pressure, and the pipe 66 for adjusting the internal pressure is connected to the through hole 165, the through hole 165 for adjusting the internal pressure is supplied every time the molten metal is supplied into the container 100. It is possible to confirm the adhesion of metal. Therefore, it is possible to prevent clogging of the pipe 66 and the through hole 165 used for adjusting the internal pressure.

Further, in the container 100 according to this embodiment,
The hatch 162 is provided with a through hole 165 for adjusting the internal pressure,
Moreover, since the hatch 162 is provided almost at the center of the upper surface of the container 100 corresponding to the position where the change in the liquid surface of the molten aluminum and the degree of droplet scattering are relatively small, the molten aluminum is used for adjusting the internal pressure. Piping 6
6 and the through holes 165 are less likely to adhere. Therefore, it is possible to prevent clogging of the pipe 66 and the through hole 165 used for adjusting the internal pressure.

Furthermore, in the container 100 according to this embodiment, since the hatch 162 is provided on the upper surface of the large lid 152, the distance between the back surface of the hatch 162 and the liquid surface is large.
2 is longer than the distance between the back surface and the liquid surface by the thickness of the large lid 152. Therefore, the possibility that aluminum will adhere to the back surface of the hatch 162 provided with the through hole 165 is reduced, and clogging of the pipe 66 and the through hole 165 used for adjusting the internal pressure can be prevented.

In the present embodiment, first, the forklift 40 is used in the second factory 20 shown in FIG.
Molten metal is stored in the container 100. That is, the molten metal is stored in the container 100 from the furnace 21 by operating the vacuum pump 72 installed in the forklift 40 to reduce the pressure in the container 100. Here, conventionally, the container 1
Although the upper lid of No. 00 was opened and the molten metal was housed in the container 100 while being exposed to the outside air, since the vacuum pump is used in this embodiment, the molten metal can be prevented from being exposed without being exposed to the outside air. Further, since the molten metal is contained by opening the upper lid as in the conventional case, the molten metal may be scattered, but in the present invention, since it is not exposed to the outside air, there is no such problem, and it is safe and easy. Molten metal container 10
It can be accommodated within 0.

Next, when the molten metal is supplied to the holding furnace 12 on the side of the first factory 10, pressurized gas is supplied from the receiver tank 71 into the container 100 in the state shown in FIG. The molten metal by pressure.

In this embodiment, valves such as the receiver tank 71 and the pressure controller 58 are provided on the side of the forklift 40 that delivers the container 100.
It is not necessary to provide a pressure adjusting mechanism or control system for each 00, and productivity is improved. Further, when supplying the molten metal to the container and when supplying the molten metal from the container to the use point, it is not necessary to tilt the container as in the conventional case, and the molten metal can be handled efficiently and safely.

Further, in this embodiment, since various valves are provided between the connection mechanism 73 and the receiver tank 71, that is, on the forklift 40 side, these valves for pressure adjustment are provided for each container 100. It is possible to prevent the valve from being damaged or deteriorated due to heat of the container 100 containing the high-temperature molten metal or the like, and to improve the safety when handling the molten metal.

Further, in this embodiment, since the filter 81 is provided, the inside of the pressurized gas pipe 49a and the vacuum pipe 4 are
It is possible to prevent clogging and generation of impurities such as dust, dust, and water droplets in 9b and the air hose 57. In particular, the filter 81 is provided between the connection mechanism 73 and the filter 81 so that the pressure controller 58, the relief valve 82, the control valve such as the leak valve 86, and the receiver tank when the container 100 is pressurized. It is possible to prevent impurities from 71 or the vacuum pump 72, dust in the piping such as the air hose 57, etc. from flowing into the container. On the other hand, container 1
At the time of depressurizing the inside of 00, for example, the molten metal solidified in the container 100 can be prevented from flowing out to the receiver tank 71 or the vacuum pump 72 side through the pipe such as the air hose 57.

The present invention naturally includes a combination of the constituent elements shown in the embodiments within a reasonable range.

For example, in the above-mentioned embodiments, the explanation was made on the premise of a carrier vehicle equipped with an engine, but the present invention can also be applied to a carrier vehicle using a battery-driven motor as a power source. In this case, the compressor may be supplied with electric power from a battery for driving the motor or a battery connected to the battery.

(Embodiment 2) Hereinafter, a container which constitutes the present invention or is used in the use of the method of the present invention and which is indispensable for solving the problems of the present invention will be described with reference to FIGS.

The container 101 shown in FIGS. 10 to 12 is different from the above embodiment in the structure of the flow path. That is, the lining 10 having, inside the frame 101a, a convex portion 101c which is a continuous bulge inward in the vertical direction.
1b is provided. The lining 101b preferably has a laminated structure of a refractory layer and a heat insulating layer as in the above embodiment.
These materials may be the same as those in the above embodiment. A channel 109 that penetrates from a position near the bottom of the container 101 to the upper surface of the container 101 is provided in the convex portion 101c.

The flow path 109 is surrounded by, for example, a pipe 134. The pipe 134 is preferably made of ceramic, or a pipe made of iron with a ceramic refractory layer 134b lined on the inner surface thereof can be preferably used. Thereby, the heat resistance of the pipe 134 is improved. Also piping 1
34 is embedded in the lining 101b via the filler 110. The material of the filler 110 is intentionally selected so as to have a lower strength than that of the lining 101b, and the workability at the time of replacement is improved.

At the upper part of the channel 109, for example, the pipe 108
Is detachably connected. The pipe 108 is, for example, an iron pipe having an inner surface lined with a refractory material. The shape is preferably an R or Γ shape. The inner diameters of the flow path 109 and the pipe 108 subsequent thereto are preferably about 65 mm to 85 mm. By setting the inner diameter of the pipe in this way, the pressure required to transport (lift) the molten aluminum becomes small. Therefore, the amount of pressurized gas required to transport a unit mass of aluminum is reduced, and a compact compressor can be used. Therefore, not only the workability is improved, but also the load on the engine is reduced, the battery consumption of the transport vehicle is reduced, and the mileage is extended. Pressurized gas flow path 109 in this case
The inner diameter of is slightly larger than the inner diameter of the pipe 108 because the portion where the molten aluminum is lifted against gravity is mainly the flow path 109.

In this embodiment, in particular, the flow path 109 has the convex portion 1
01c from the position close to the inner bottom of the container 101
Since it penetrates to the upper surface side, the area of the inner wall of the container 101 that surrounds the flow path 109 is substantially increased.
The amount of heat transferred from the molten aluminum that contacts the inner wall to the flow path 109 increases. Therefore, it is possible to improve the heat retaining property of the flow path 109 and ensure the fluidity of the molten metal.

The container 201 illustrated in FIG. 13 has a heat insulating material 72 and a refractory material 73 as linings inside the frame 71.
Has a laminated structure. Insulation 72 in place
A board material 74 is interposed between the and the refractory material 73. The refractory material 73 internally has a flow path 75 for circulating the molten metal between the inside and the outside of the container. Further, in the container 201, a large lid 78 is arranged in an upper opening 77 of a bottomed and tubular main body 76, and the main body 76 and the large lid 78 are fixed by fastening bolts between these flanges.

An opening 79 is formed in the center of the large lid 78.
And a hatch 80 that can be opened and closed is arranged in the opening 79. A through hole 81 for adjusting the internal pressure for depressurizing and pressurizing the inside of the container 201 is provided at the center of the hatch 80 or at a position slightly deviated from the center. Piping (not shown) for pressurization and depressurization is connected to the through hole 81. At the tip of the pipe, a tank for accumulating pressurized gas and a pump for pressurization are connected to the pressurizing pipe, and a depressurizing pump is connected to the depressurizing pipe. Then, it is possible to introduce the molten aluminum into the container 201 through the pipe by using the pressure difference by depressurization, and melt the aluminum outside the container 201 through the pipe by using the pressure difference by pressurization. Aluminum can be derived.

Here, the flow path 75 is surrounded by a pipe 83 made of ceramic such as silicon nitride. The pipe 83 is embedded in the refractory material 73 via a filling material 84. Filling material 8
No. 4 has lower strength than the refractory material 73. The ceramic pipe 83 has good fire resistance and non-wetting property, and it is not necessary to provide a fire resistant material on the inner wall. Thereby, the heat resistance of the pipe 83 is enhanced. Here, the strength mainly means the bending strength with respect to external mechanical stress. The lining 72 may be, for example, a dense refractory ceramic material, and the filler 84 having a lower strength than that may be, for example, a ceramic fiber and a binder.

The flow path 75 surrounded by the pipe 83 extends toward the upper part of the outer periphery of the main body 76 through the opening 85 provided in the inner periphery of the main body 76 near the bottom of the container main body. is doing. At the upper part of the flow path 75, for example, pipe made of iron and having a refractory lining inside (not shown)
Are detachably connected with bolts.

A first flange 86 is provided at the upper end of the pipe 83, and a second flange 87 facing the lower surface of the first flange 86 is provided on the frame 71 so as to surround the periphery of the pipe 83. . A flange member 88 for fixing the ceramic pipe 83 is interposed between the first flange 86 and the second flange 87. Code 89
Is a hole for injecting the filler 84 and is usually sealed with a plug or the like.

To the upper part of the flow path 75, for example, a pipe whose inner surface is lined is detachably connected. The inner diameters of the flow path 75 and the pipes following it are almost the same, and
About mm is preferable. Conventionally, this type of piping has an inner diameter of 5
It was about 0 mm. This is because it was thought that when the pressure was more than that, a large pressure was required when the molten metal was discharged from the pipe by pressurizing the inside of the container.

FIG. 14 is a sectional view showing another example of the container. In this example, the pipe 303 (stoke) forming the flow path 302 is vertically arranged in the container. Therefore, if there is molten metal in the container 301, the pipe 30
2 comes into direct contact with the molten metal. Piping 302
Is made of ceramic such as silicon nitride. This improves fire resistance and prevents clogging of the piping. Channel 30
A pipe (not shown) made of, for example, iron and having an inner surface lined is connected to an upper portion of the pipe 2. In this embodiment, this pipe can be rotated. This facilitates handling in a narrow area. The reference numeral 304 indicates the piping 30.
2 shows a member that holds 2 rotatably.

FIG. 15 is a sectional view schematically showing still another example of the container. In this example, the refractory material 4 is used as the lining.
02 has a convex portion 406 that is a raised portion that extends upward from below toward the inside of the container, and the flow passage 403 is present in the convex portion 406, and the flow passage 403 is a pipe 4 made of ceramic such as silicon nitride.
Covered by 04. The pipe 404 is filled with a filling material 405.
It is embedded in the refractory material 402 via. Filling material 40
Material 5 is selected and used so that its strength is lower than that of the refractory material 402. The ceramic pipe 404 has good fire resistance, and it is not necessary to provide a refractory material on the inner wall.

FIG. 16 is a sectional view showing still another example of the container. In this example, the outer periphery of the main body 502 has a protruding portion 503 that protrudes like a watering can (a protruding portion that gradually protrudes toward the outer peripheral side from the lower portion of the cylindrical side surface toward the upper portion). A flow path 504 is provided in the protrusion 503, and the flow path 50
4 is covered with a pipe 505 made of ceramic such as silicon nitride. The pipe 505 is embedded in the refractory material 373 via the filling material 506. Filler 506 is refractory 37
A material with a strength lower than 3 is selected and used.

An opening 379 is provided substantially in the center of the large lid 378, and an openable / closable hatch 380 is arranged in the opening 379. A through hole 381 for adjusting the internal pressure for depressurizing and pressurizing the inside of the container 501 is provided at the center of the hatch 380 or at a position slightly deviated from the center.
Piping (not shown) for pressurization and depressurization is connected to the through hole 381. At the tip of the pipe, a tank for accumulating pressurized gas and a pump for pressurization are connected to the pressurizing pipe, and a depressurizing pump is connected to the depressurizing pipe. Then, by reducing the pressure, it is possible to introduce the molten aluminum into the container 201 by utilizing the pressure difference, and by applying the pressure, it is possible to derive the molten aluminum out of the container 201 by utilizing the pressure difference.

FIG. 17 is a sectional view showing another example of the container. In this example, the outer periphery of the main body 601 has a protruding portion 602 that protrudes like a watering mouth (a protruding portion that gradually protrudes toward the outer peripheral side from the lower portion of the cylindrical side surface toward the upper portion). A flow path 603 is included in the protrusion 602. The flow path 6
A pipe 604 such as a ceramic pipe or an iron pipe having a refractory lining inside is embedded and fixed to a part of 03 (here, at the bottom). The portion of the flow path 603 in which the pipe is embedded is a portion (for example, a portion indicated by reference numeral 605) where cracks may occur in the refractory material 402 or the lining 403, and the presence of the pipe causes the pressure-feeding gas to flow from the cracked portion. Can be prevented. The pipe 604 is preferably embedded in the refractory material 402 or the lining 403 when the container 601 is molded. Also in this embodiment, the flow path 603
A pipe having a pipe or a reducer is connected to the upper part of the pipe. Also in this connection, the connection may be made by a flange via a packing. Also, this pipe may be rotatable. As the rotatable mechanism, for example, one point of the flange in the connecting portion of the pipe with the container is rotatably connected with the container-side flange, and the flange of the pipe and the container-side flange are fixed by a clamp mechanism. May be. As a result, a container having a small turning radius and good handling can be constructed. Further, by making the pipe rotatable in this manner, maintenance of the flow path on the container side can be easily performed. A holding member may be provided on the container side to hold the pipe that is rotated and bent. At that time, the holding member may be provided with a means for fixing the pipe.

The opening 4 is formed in the center of the large lid 408.
09 is provided, and an openable / closable hatch 410 is arranged in the opening 409. At the center of the hatch 410 or at a position slightly deviated from the center, a through hole 404 for adjusting the internal pressure for performing depressurization and pressurization inside the container 501 is provided. Piping (not shown) for pressurization and depressurization is connected to the through hole 404. At the tip of the pipe, a tank for accumulating pressurized gas and a pump for pressurization are connected to the pressurizing pipe, and a depressurizing pump is connected to the depressurizing pipe. Then, it is possible to introduce the molten aluminum into the container 601 by utilizing the pressure difference by depressurization, and to draw out the molten aluminum to the outside of the container 601 by utilizing the pressure difference by pressurization. The shape of the container is not limited to a cylinder and may be, for example, a quadrangle.

[0124]

As described above, according to the present invention,
It is possible to pressurize the inside of the container with a stable pressure without impairing workability.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a metal supply system according to an embodiment of the present invention.

FIG. 2 is a front view showing the configurations of a forklift and a container according to the embodiment of the present invention.

FIG. 3 is a plan view of the forklift and the container shown in FIG.

FIG. 4 is a diagram showing a configuration of a pressurizing / depressurizing system between a forklift and a container according to an embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a leak valve according to an embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a leak valve which is considered to be general.

FIG. 7 is a sectional view of a container according to an embodiment of the present invention.

FIG. 8 is a plan view of the container shown in FIG.

9 is a cross-sectional view taken along the line AA of FIG.

FIG. 10 is a diagram showing an example of a container used in the present invention.

FIG. 11 is a diagram showing an example of a container used in the present invention.

FIG. 12 is a diagram showing an example of a container used in the present invention.

FIG. 13 is a diagram showing an example of a container used in the present invention.

FIG. 14 is a diagram showing an example of a container used in the present invention.

FIG. 15 is a diagram showing an example of a container used in the present invention.

FIG. 16 is a diagram showing an example of a container used in the present invention.

FIG. 17 is a diagram showing an example of a container used in the present invention.

FIG. 18 is a diagram showing another example of the configuration of the pressurizing / depressurizing system between the forklift and the container according to the embodiment of the present invention.

[Explanation of symbols]

40 forklift 41 Pressurization hole 42 lid 44 piping 53 Pressure sensor 57 Air hose 71 Receiver tank (pressurized gas storage tank) 72 Vacuum pump 73 Connection mechanism 80 switching valve 81 Filter 82 Relief valve 86 Leak valve 100 containers 201 Engine for running 202 generator 203 Air compressor

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI B22D 41/50 510 B22D 41/50 510 41/54 41/54 (72) Inventor Koji Iyoda 66 Tsujimachi, Izumi-cho, Toyota-shi, Aichi Prefecture Hoei Shokai Co., Ltd. (72) Inventor Kenji Noguchi 66 Tsujimachi Teraike, Toyota-shi, Aichi Prefecture Hoei Shokai Co., Ltd. (72) Inventor Takeshi Abe 66, Tsutsumiike Tsujimachi, Toyota-shi, Aichi Hoei Shokai (56) References JP-A-2002-263828 (JP, A) JP-A-6-106322 (JP, A) JP-A-6-114524 (JP, A) JP-A-2002-316258 (JP, A) Actual Kaihei 3-31063 (JP, U) International publication 01/098004 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B22D 35/00 B22D 17/30 B22D 39/06 B22D 41/00 B22D 41 / 12 B22D 41/50 510 B22D 41/54

Claims (12)

(57) [Claims] 1. A carrier for holding and transporting a container capable of containing molten metal and utilizing the pressure difference to allow the molten metal to flow to and from the outside, the transport carrying at least an engine for traveling. A vehicle, wherein a generator driven by the engine while the vehicle is traveling or idling by the engine for traveling, a gas compressor driven by electric power generated by the generator, A tank for accumulating gas compressed by a gas compressor is mounted, and an interface part that is detachable from the container provided at the tip of an air hose leading to the tank is connected to the container, and the air from the tank is connected to the container. A transport vehicle characterized in that the inside of the container is pressurized via a hose so that the molten metal contained in the container is supplied to the outside. 2. A transport vehicle for holding and transporting a container capable of containing molten metal and utilizing the pressure difference to allow the molten metal to flow to and from the outside, and an engine for running the vehicle. A generator driven by the engine; a gas compressor driven by electric power generated by the generator; a tank for accumulating gas compressed by the gas compressor; Has an interface section,
A pressure-adjusting unit for pressurizing the inside of the container through the interface unit. 3. A transport vehicle for holding and transporting a container capable of accommodating molten metal and utilizing the pressure difference to allow the molten metal to flow to and from the outside, and a motor for traveling the vehicle. A battery for supplying electric power to the motor, a gas compressor driven by the electric power of the battery, a tank for accumulating gas compressed by the gas compressor, and an interface unit detachable from the container Have
A pressure-adjusting unit for pressurizing the inside of the container through the interface unit. 4. The carrier vehicle according to claim 2 or 3, further comprising a filter provided on a line between the gas compressor and the tank. 5. The transport vehicle according to claim 2 or 3, wherein the container has a hatch that can be opened and closed on an upper surface, and the interface portion is connected to a connection portion for adjusting an internal pressure provided in the hatch. A transport vehicle that is removable. 6. A carrier vehicle for holding and transporting a container capable of containing molten metal and utilizing a pressure difference to allow the molten metal to flow to and from the outside, the gas compressor comprising: A tank for accumulating gas compressed by a machine, an interface part detachable from the container at one end, an air hose leading to the tank, and a gas flow path between the tank and the air hose. Na
Line, a first leak valve connected to the line , and a filter provided between the first leak valve and the interface section and on the line. Carrying vehicle. 7. The carrier vehicle according to claim 6, further comprising a second leak valve connected between the first leak valve and the interface section and connected to the line , the filter between said second leak valve and the front Symbol interface unit, and the La
A transport vehicle characterized by being provided on the inn . 8. A transport vehicle for holding and transporting a container capable of containing molten metal and utilizing the pressure difference to allow the molten metal to flow to and from the outside, the gas compressor comprising: Tank for accumulating gas compressed by a machine, a vacuum pump, an air hose having at one end an interface part detachable from the container, a switching part, and a gas flow between the tank and the switching part. Become a road
A first line and a gas flow path between the vacuum pump and the switching unit,
Gas between the switching line and the other end of the air hose
And a third line that serves as a flow path for the first line and the third line.
To the second line and the third line
A transport vehicle characterized by switching between connection with and . 9. The transport vehicle according to claim 8, between the tank and the interface section , and
A first leak valve connected to the first or third line, and a filter provided between the first leak valve and the interface section and on the first or third line And a carrier vehicle. 10. The transport vehicle according to claim 9, wherein the switching unit and the other end of the air hose are connected to each other .
And a second leak valve connected to the third line , wherein the filter is provided between the second leak valve and the air hose and on the third line. A transport vehicle characterized by 11. A container capable of containing molten metal and holding a container capable of circulating molten metal with the outside by utilizing a pressure difference,
A pressure difference control unit mounted on a vehicle to be transported, comprising a gas compressor, a tank for accumulating the gas compressed by the gas compressor, and an interface section detachable from the container,
A pressure difference control unit for pressurizing the inside of the container with the compressed gas through the interface unit. 12. A container capable of accommodating a molten metal and allowing the molten metal to flow to and from the outside by utilizing a pressure difference is used, and the container is detachably held by a forklift and the container is attached. A method of supplying molten metal, which carries the molten metal contained in the container to a use point by holding the container by a forklift and holding the container by a forklift and not substantially tilting the forklift, Driven by a generator or a battery driven by the engine while the forklift is traveling or idling by a traveling engine mounted on the forklift, and electric power generated by the generator or electric power supplied from the battery. And a gas compressor that stores the gas compressed by the gas compressor. It is equipped with a stacking tank and is installed at the tip of the air hose leading to the tank,
An interface part detachable from the container is connected to the container, the inside of the container is pressurized from the tank through the air hose, and the molten metal contained in the container is supplied to a use point. A method for supplying molten metal, comprising: