JP3491757B1 - Transport vehicle, molten metal supply method, and molten metal supply system - Google Patents

Abstract

An object of the present invention is to provide a transport vehicle capable of urgently stopping the pressurization of a container with a very simple operation. When an emergency stop is required while a pressurizing gas is being supplied from a receiver tank 5 into a container 100, a lever 10 is turned to turn a three-way valve 41 to a second position.
Switch to the mode. Then, the first in the three-way valve 41
Since the flow path of the valve port 42 is closed, the supply of the pressurizing gas from the receiver tank 5 into the container 100 is stopped. Further, since the gas can flow between the second valve port 43 on the container 100 side and the third valve port 44 opened to the atmosphere, the container 1
00 is opened to the atmosphere. That is, at the time of emergency stop, the driver's seat 2
The supply of pressurization gas from the receiver tank 5 into the container 100 and the release of the atmosphere in the container 100 can be simultaneously performed with one action of manually rotating one lever 10 provided near the container 100. And is extremely safe.

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 switching device for use in a system for pressurizing the inside of a container storing molten metal such as molten aluminum and discharging the molten metal to the outside.

[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 container 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 the holding furnace of each die casting machine. ing. As one form thereof, a system has been proposed in which pressure is applied to the container and the molten metal is supplied from the container to the holding furnace by utilizing the pressure difference between the inside and the outside (for example, refer to Patent Document 1).

In the technique disclosed in the above publication, when the molten aluminum is started to be supplied from the container to the holding furnace by pressurization and then the supply is stopped, the gas is supplied to the container in order to obtain an atmospheric state. The switching is performed so that the inside of the container is exhausted from the air (Patent Document 1, page 10, line 7 to line 11).

[0004]

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

[0005]

Since a very high temperature molten metal is stored in such a container, it is highly necessary to urgently stop the pressurization of the container for some reason. In Patent Document 1, it is possible to cope with such an emergency stop by switching from the air supply to the exhaust.

[0006] However, if the switching fails due to electrical troubles or the like due to factory noise or exhaust cannot be performed, a serious accident may occur. Therefore, for example, it is conceivable to attach a manual air release valve and a valve that blocks the flow path and manually operate these valves at the time of emergency stop, but in this case, switching operation of two valves is required. , There is a problem.

The present invention has been made in order to solve such a problem, and is capable of urgently stopping the pressurization to the container and the supply of the molten metal from the container to the outside with a very simple operation. A transport vehicle that can be used, a method of supplying molten metal,
It is intended to provide a molten metal supply system. Further, another object of the present invention is to provide a transportation vehicle, a molten metal supply method, and a molten metal supply system, which have a short time to stop in an emergency or the like and have high safety, reliability, and reliability.

[0008]

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 transport vehicle that holds and transports various containers,
An output part for outputting the pressurized gas supplied to the container, a flow path for supplying the pressurized gas from the output part to the container, and the flow path inserted between the output part side and the container. Side is manually switched between a first mode for allowing gas to flow and a second mode for allowing gas to flow between the container side and a third connection port open to the atmosphere. And a switching valve capable of performing the switching.

According to the present invention, when an emergency stop of pressurization to the container is to be performed, the pressurization into the container is stopped by manually operating the switching valve to switch from the first mode to the second mode. At the same time, the inside of the container can be opened to the atmosphere. Therefore, the pressurization to the container can be stopped urgently with a very simple operation. That is, according to the transport vehicle of the present invention, the first mode and the second mode are exclusively switched by the same single operation, which is extremely useful when, for example, an emergency stop of the molten metal supply is desired. Yes, it is possible to improve the safety, reliability and reliability of the system. Of course, the supply of the molten metal may be stopped by the configuration of the present invention other than in an emergency. Further, since the switching valve according to the present invention can be configured by a three-way valve, for example, the number of parts can be reduced.

The above-mentioned output section is a tank or the like connected to a tank for storing pressurized gas mounted on the transport vehicle or a pressurized gas supply tank on the factory side.

The flow path according to the present invention includes, for example, piping and an air hose.

The present invention further comprises an atmosphere release valve connected to the flow path (interposed between the flow path and the atmosphere release port), and control means for controlling opening / closing of the atmosphere release valve. It is characterized by doing. The atmosphere release valve and the control means are separate from the emergency stop means for pressurizing the inside of the container.

According to the present invention, a part of the flow path is constituted by a flexible air hose for connecting to the container, and at the end of the air hose, the first joint part provided in the container is attached and detached. A second joint portion that is operably connected is provided, and a fork portion that can be inserted into and removed from a pair of channel members provided on the bottom surface of the bottom of the container is further provided.

Therefore, the transport vehicle according to the present invention is capable of transporting a large number of containers by one unit and discharging the molten metal to the outside at the use point. In that respect, at least the above-mentioned Patent Document 1 in which the container and the vehicle are integrated is different.

A transport vehicle according to another aspect of the present invention is a transport vehicle that holds a container capable of containing molten metal and utilizing the pressure difference to allow the molten metal to flow to and from the outside. An output unit for outputting the pressurized gas supplied to the container, an exhaust unit for exhausting the gas from the container, a pressurization mode for pressurizing the container, and an exhaust for exhausting the container. A first switching valve for switching between modes and
A first flow path between the output section and the first switching valve;
A second flow path between the exhaust unit and the first switching valve;
A third flow path communicating from the first switching valve to the container side and the third flow path are interposed so that gas can flow between the first switching valve side and the container side. And a second switching valve capable of manually switching between a second mode for allowing gas to flow between the container side and a connection port open to the atmosphere. Is characterized by.

Here, the exhaust unit may be, for example, a vacuum pump mounted on the transport vehicle, or may be an interface unit for connecting to an exhaust facility in the factory.

The invention according to still another aspect is a method of supplying molten metal, characterized in that the above-mentioned transport vehicle is used to supply molten metal to a point of use.

A molten metal supply system according to another aspect of the present invention is (a) capable of containing molten metal, allowing molten metal to flow to and from the outside by utilizing a pressure difference, a leak valve,
A container without an atmosphere release valve such as a relief valve, (b)
A transport vehicle for holding and transporting the container, wherein an output part for outputting a pressurized gas supplied to the container, a flow path for supplying a pressurized gas from the output part to the container, The first mode, which is inserted in the flow path and allows gas to flow between the output section side and the container side, and the gas can flow between the container side and the connection port open to the atmosphere. And a transport vehicle equipped with a switching valve capable of manually switching between the second mode and the second mode.

The valve body of the valve is generally made of resin, but it is 700 ° C. like a system for handling molten aluminum.
When exposed to a high temperature environment, there are problems in terms of reliability and safety. That is, the pressurized gas in the container has a high temperature due to the heat of the molten metal, and if the pressurized gas is to be opened, the valve is likely to be thermally damaged, causing a problem in reliability. This problem is particularly remarkable in the case of safety-related valves such as leak valves and relief valves. Therefore, from the viewpoint of reliability and cost, it is desirable that the container does not have the atmosphere release valve, but such a container is dangerous. By adopting the switching valve according to the present invention, such a danger can be avoided as much as possible. In addition, the safety can be further improved in the new system in which the atmosphere release valve is not provided on the container side by providing the atmosphere release valve on the transport vehicle side.

A switching device according to another aspect of the present invention is a first switching device.
A first mode in which gas can flow between the second connection port and the second connection port, and a gas can flow between the second connection port and the third connection port open to the atmosphere A switching valve having a second mode, a pressure-side first flow path connected to the first connection port, and a pressure-side second flow path connected to the second connection port. And a flow path.

In the present invention, when an emergency stop of pressurization to the pressurized side is to be performed, the switching valve is manually operated to simultaneously switch from the first mode to the second mode by the same single operation, The pressurized side can be opened to the atmosphere at the same time as the pressure applied to the pressurized side is stopped. Therefore, it is possible to urgently stop the pressurization on the pressed side by a very simple operation.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a side view showing an appearance of a carrier vehicle according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. This transport vehicle 1 basically has, for example, a base portion constituted by a forklift, and a driver's seat 2 provided substantially in the center.
And a fork portion 3 provided in front of the forklift truck. The forklift truck is configured with the pressurizing / depressurizing unit 4 mounted on the forklift truck as a base.

The pressurizing / depressurizing unit 4 includes two receiver tanks 5 for storing the pressurizing gas supplied to the container 100.
The receiver tank 5 has an air compressor 6 for supplying a pressurizing gas, a vacuum pump 7 for reducing the pressure in the container, a filter 8 and the like.

The emergency stop portion 9 according to the present invention is provided on the front side of one side surface of the driver's seat 2. As a result, the driver in the driver's seat 2 can access the emergency stop lever 10 provided in the emergency stop unit 9.

The pressurizing / depressurizing unit 4 and the emergency stop unit 9 are connected by a pipe 11, and the pressurizing / depressurizing unit 4 is connected to the emergency stop unit 9.
Is communicated with the air hose 12 via. The pressurizing gas supplied from the pressurizing / depressurizing unit 9 is discharged from the tip of the air hose 12 through the pipe 11, the emergency stop portion 9 and the air hose 12.

At the tip of the air hose 12, the container 100
A joint portion 14 that is attachable to and detachable from the joint portion 13 provided on the. Then, the joint portion 14 at the tip of the air hose 12 is connected to the joint portion 13 of the container 100, and the pressurizing gas is supplied into the container 100 from the receiver tank 5 of the pressurizing / depressurizing unit 4 via the air hose 12. The inside of the container 100 can be pressurized. Similarly, the joint portion 14 at the tip of the air hose 12 is connected to the joint portion 13 of the container 100, and the inside of the container 100 can be depressurized by the vacuum pump 7 of the pressurizing / depressurizing unit 4 via the air hose 12 ( (See FIG. 3).

The fork portion 3 has a fork 15 which is attachable to and detachable from a pair of channel members 171 provided on the back surface of the bottom of the container 100, and an elevating mechanism 16 for elevating the fork 15.

FIG. 3 is a diagram showing the structure of the pressurizing / depressurizing unit 4. As shown in FIG. 3, the pressurizing / depressurizing unit 4 generates electric power by the generator 18 driven by the engine 17 and at least during the traveling or idling of the transport vehicle 1 by the traveling engine 17. And an air compressor 6 driven by the electric power. The air compressor 6 is driven by a battery when the vehicle is operated by a battery and a motor, and in this case, the air compressor can be driven independently of traveling and idling of the vehicle.

The pressurizing gas compressed by the air compressor 6 is stored in the receiver tank 5. That is, the compressed gas is temporarily accumulated in the receiver tank 5 from the air compressor 6 while the transport vehicle 1 is traveling or idling. Therefore, the receiver tank 5 includes the air compressor 6 and the container 1.
It will act as a buffer between 00 and so to speak. 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. Also, the receiver tank can be constantly charged with gas, and the molten metal can be supplied to the outside at any time.
You will be able to do it very flexibly anywhere.

According to the knowledge of the present inventors, it is very important to stably pressurize the inside of the container 100 as described above. This is because if the pressure in the container 100 is unstable when it is pressurized, the molten metal containing gas can be suddenly ejected from the tip of the pipe of the container 100.

A first check valve 20, a line filter 8a, an air dryer 8b, and a second check valve 21 are provided on the pipe 19 between the compressor 6 and the receiver tank 5 in this order from the compressor 6 side. . The first check valve 20 and the second check valve 21 are both for preventing backflow of gas from the receiver tank 5 side to the compressor 6 side. The first check valve 20 prevents the backflow of gas from the side of the line filter 8a and the air dryer 8b to the compressor 6 when the compressor 6 is stopped, for example, and is provided particularly near the line filter 8a. preferable. As a result, it is possible to more effectively prevent the pipe 19a between the compressor 6 and the line filter 8a from being soiled or clogged.

The line filter 8a is a filter for removing water droplets and oil from the gas sent from the compressor 6 to the receiver tank 5. The air dryer 8b is a filter that dries the gas sent from the compressor 6 to the receiver tank 5.

The second check valve 21 prevents the reverse flow of gas from the receiver tank 5 to the compressor 6. A pressure switch 22 is connected to the pipe 19b between the receiver tank 5 and the second check valve 21.

The pressure switch 22 includes a pressure sensor 23 and C
The PU 24 is provided. The pressure sensor 23 detects the pressure of the receiver tank 5 and controls the ON / OFF of the compressor 6 based on the detection result. For example, receiver tank 5
The compressor 6 is turned on when the pressure of 1 is lower than a predetermined value, and the power of the compressor 6 is turned off when the pressure of the receiver tank 5 is higher than the predetermined value.

A pipe 19c for opening to the atmosphere is connected to a pipe 19a between the compressor 6 and the first check valve 20. One end of the pipe 19c is open to the atmosphere via the leak valve 25. The leak valve 25 is controlled to be opened and closed by the CPU 24 of the pressure switch 22.

The CPU 24 opens the closed leak valve 5 before turning on the compressor 6 when the pressure in the receiver tank 5 becomes equal to or lower than a predetermined value. As a result, the inside of the pipe 19a between the compressor 6 and the first check valve 20 returns to atmospheric pressure. Then the CPU 24
Turns on the compressor 6 and closes the leak valve 25 in the open state after a lapse of a predetermined time. By thus returning the inside of the pipe 19a to atmospheric pressure once, the compressor 6 can be started up with smaller power, and the compressor 6 can be downsized.

In the present embodiment, the pipe upstream of the receiver tank 5 has a pipe diameter of, for example, 2 /, as compared with the pipe downstream of the receiver tank 5 (the side closer to the container 100).
About 3 thin. This is from receiver tank 5 to container 100
This is because a large amount of gas is pressure-fed at one time, while the gas is gradually delivered from the compressor 6 to the receiver tank 5.

In this embodiment, the line filter 8a and the air dryer 9b are provided not upstream of the receiver tank 5 but upstream of the receiver tank 5, that is, on the pipe 19 between the receiver tank 5 and the compressor 6. That is, the line filter 8a and the air dryer 8b can be miniaturized by providing the gas flow rate per unit time on the narrow side of the pipe which is smaller.

The receiver tank 5 is connected to a pressurized gas pipe 26, and the pressurized gas pipe 26 is connected to a switching valve 27 which is, for example, a three-way valve. Also, the vacuum pump 7
Is similarly connected to the vacuum pipe 28, and the vacuum pipe 2
8 is connected to the switching valve 27. The switching valve 27 switches the connection between the air hose 12 side and the pressurized gas pipe 26 and the connection between the air hose 12 side and the vacuum pipe 28. The switching valve 27 is connected to one end of the air hose 12 via a pressure gauge 29, a relief valve 30, a leak valve 31, an emergency stop unit 9 and a filter.

The control valve 32 and the leak valve 3 are connected to the pressurized gas pipe 26 from the receiver tank 5 side (upstream side).
3 is connected. A control valve 34 and a leak valve 3 are connected to the vacuum pipe 28 from the vacuum pump 7 side (downstream side).
5 is connected.

The control valves 32 and 34 adjust the pressures in the pressurized gas pipe 26 and the vacuum pipe 28, respectively, and also connect and disconnect (on / off) the respective pipes. ing.

The filter 51 prevents oil, aluminum powder, dust such as aluminum pieces, etc. delivered from the container 100 side from flowing into the valves and the emergency stop portion 9 on the transport vehicle side and clogging them to stop operating. To do. It is conceivable to provide such a filter 51 on the container 100 side, but then it is necessary to provide a filter for each container 100. In the present invention, the number of filters required can be reduced by providing such a filter 51 on the side of the transport vehicle 1.

According to the knowledge of the present inventors, the amount of dust and the like from the container side to the receiver 5 side is much larger than the amount of dust and the like from the receiver tank 5 side to the container side. . In the present embodiment, in particular, by providing such a filter 51 on the downstream side of the valves and the emergency stop unit 9, the relief valve 30 is provided by dust or the like sent from the container 100 side.
It is possible to prevent clogging of the valve and other valves. However, it does not matter if the filter 51 is arranged upstream of this or at a plurality of locations. For example, the filter 51 may be provided between the switching valve 27 and the relief valve 30, and the filter 31 may be provided between the switching valve 27 and the leak valve 33.

The pressure control valve and the valve system are electronically controlled by an electric control panel (not shown), and the inside and outside of the container 100 can be controlled by operating a hand operation panel (not shown). The pressure difference between the two can be adjusted.

Next, the emergency stop unit 9 will be described. 4 is an enlarged view of the emergency stop unit 9, FIG. 5 is a cross-sectional view of the emergency stop unit 9 during normal operation (when not in an emergency stop state), and FIG. 6 is a cross-sectional view of the emergency stop unit 9 during emergency stop. .

As shown in FIG. 4, the emergency stop portion 9 is constituted by a pipe 38 extending downward from the upper portion (first portion 36) and bent toward the driver's seat at the lower portion (second portion 37). It The pipe 11 from the pressurizing / depressurizing unit 4 is connected to the upper end 39 of the pipe 38, and the air hose 12 is connected to the other end 40.

A three-way valve 41, which is one form of a switching valve, is inserted in the second portion 37 of the pipe 38. Three-way valve 41
The first valve port 42 of the No. 1 is connected to the pressurizing / depressurizing unit 4, the second valve port 43 is connected to the air hose 12, and the third valve port 44 is open to the atmosphere. The three-way valve 41 has a first mode in which gas can flow between the first valve opening 42 and the second valve opening 43 by the manual rotation of the lever 10, and
It is possible to switch to a second mode in which gas can flow between the second valve opening 43 and the third valve opening 44.

According to the present invention, when it is desired to stop the pressurization of the container in an emergency such as when the receiving side of the molten metal is likely to overflow, the switching valve is manually operated to change from the first mode to the first mode. By switching to the mode of 2, it is possible to stop the pressurization into the container and at the same time to open the container to the atmosphere. Therefore, the pressurization to the container can be stopped urgently with a very simple operation. That is, according to the present invention, the first mode and the second mode can be simultaneously and exclusively switched by the same single operation, which is extremely useful in the case of an emergency stop.

Further, since the switching valve according to the present invention can be constituted by a three-way valve, for example, the number of parts can be reduced.

A pipe 45 whose end is open to the atmosphere is connected to the third valve port 44. The lower portion of this pipe 45 is connected to the third valve port 44, extends from the lower portion to the upper portion, and extends horizontally on the side opposite to the driver's seat on the upper portion to connect with the pipe 38 and the first pipe.
It is designed to cross the part 36 of.

At the end of the pipe 45, the air hose 1
A joint portion 46 that is detachably connected to the second joint portion 14 is provided. Air hose 12 in container 1
When the air hose 1 is not connected to the air hose 1, the joint portion 14 at the end of the air hose 12 is connected to the joint portion 46 provided at the end of the pipe 45.
2 can be fixed in an organized state, and fluttering of the air hose can be prevented when the pressurized gas is unexpectedly supplied.

As shown in FIG. 5, the three-way valve 41 of the emergency stop unit 9 is set to the first mode in the normal use state. As a result, gas can flow between the first valve opening 42 and the second valve opening 44, so that the gas for pressurizing the container 100 from the receiver tank 5 of the pressurizing / depressurizing unit 4 through the air hose 12 is pressed. Or the inside of the container 100 can be decompressed by the vacuum pump 7 via the air hose 12.

Then, for example, when an emergency stop is required while supplying the gas for pressurization from the receiver tank 5 into the container 100, the lever 10 is rotated as shown in FIG. Then, the three-way valve 41 is switched to the second mode.
Then, the flow path of the first valve opening 42 of the three-way valve 41 is closed, so that the supply of the pressurizing gas from the receiver tank 5 into the container 100 is stopped and at the same time the second valve opening on the container 100 side is stopped. Since gas can flow between 43 and the third valve port 44 opened to the atmosphere, the inside of the container 100 is opened to the atmosphere. That is, in the present embodiment, one lever 10 provided near the driver's seat 2 is manually rotated at the time of emergency stop.
The supply of the pressurizing gas to the inside can be stopped and the atmosphere in the container 100 can be opened at the same time, and the safety is extremely high. The same applies when the inside of the container 100 is decompressed by the vacuum pump 7, and by manually rotating the lever 10, the decompression inside the container 100 by the vacuum pump 7 is stopped and the atmosphere inside the container 100 is opened. Can be done at the same time.

Next, an example of a container which constitutes the present invention or is used in the use of the method of the present invention and which has a need for solving the problems of the present invention will be described. FIG. 7 is a sectional view showing an example of such a container, and FIG. 8 is a plan view thereof. Container 100
A large lid 152 is arranged in an upper opening 151 of a bottomed and tubular body 150. Flanges 153 and 154 are provided on the outer periphery of the main body 150 and the large lid 151, respectively, 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 144 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 top surface 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 144 is fixed so as to communicate with the eight flow paths 157. The pipe 144 has an inverted U-shape (a shape having a curvature), and correspondingly, the flow path in the pipe 144 also has an inverted U-shape (a shape having a curvature). ,
As a result, the one end port 159 of the pipe 144 faces downward. The pipe 144 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.

Further, the pipe 144 near the pipe mounting portion 158
A heat insulating member 44a is arranged around the pipe 144 so as to surround the pipe 144. As a result, it is possible to suppress the temperature of the flow channel 157 from decreasing due to the heat of the flow channel 157 being absorbed by the pipe 144 side. In particular, since the molten metal easily cools around the pipe 144 in the vicinity of the pipe mounting portion 158 and the liquid level is just swayed when the container is transported, the molten metal often solidifies, whereas By surrounding the circumference of the pipe 144 near the pipe mounting portion 158 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 144 that follows the flow path 157 are substantially the same, and are 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
57 and the inner diameter of the pipe 144 subsequent thereto is 50
It has been found that it is preferably about 65 mm to 85 mm, which is much larger than mm, more preferably about 70 mm to 80 mm, and further preferably 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 70 mm to 80 mm is sufficient to press the pressure inside the container with a very small pressure.
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 the handling and the better workability.

By setting the pipe diameter as described above, the pressure required to supply the molten aluminum can be reduced. This means that by adopting such a container, the stop time of the molten metal can be shortened without reducing the supply amount of the molten metal per unit time. For example, when the pressurized gas in the container is opened to the atmosphere via the leak valve 28 or the emergency stop unit 9, for example, the smaller the pressurization pressure (that is, the smaller the pressure in the container) is before returning to the atmospheric pressure. This is because the time required is short. Even if the pressurization is stopped, the molten metal continues to be supplied to the outside unless the pressure in the container is released. Therefore, by setting the pipe diameter as described above, the safety at the time of stopping the supply can be improved. Further, the function of the container as described here, in combination with the arrangement of the emergency stop portion and the filter of the present invention,
It improves the safety when the supply is stopped. From this point of view, this container is indispensable for solving the problems of the present invention.

The opening 1 is formed 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.

Further, at the center of the hatch 162 or at a position slightly deviated from the center, a through hole 165 for adjusting the internal pressure for depressurizing and pressurizing the inside of the container 100 is provided. 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.

The joint portion 13 already described is provided at the tip of the pipe 66. Then, it is possible to introduce the molten aluminum into the container 100 through the pipe 144 and the flow path 157 by using the pressure difference by depressurization, and by using the pressure difference by pressurizing the flow path 157 and the pipe 144. The molten aluminum can be discharged to the outside of the container 100 via the container. By using an inert gas such as nitrogen gas as the pressurized gas, it is possible to more effectively prevent the oxidation of the molten aluminum during pressurization.

In the present embodiment, the hatch 162 arranged substantially in the center of the large lid 152 is provided with a through hole 165 for pressurizing and depressurizing, while the above-mentioned pipe 66 extends in the horizontal direction. Therefore, 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.

The container 100 according to the present invention is not equipped with a relief valve, a leak valve or other valves. This point is different in structure from the conventional container (ladle).

On the large lid 152, two through-holes 170 for liquid level sensors, into which two electrodes 169 as liquid level sensors are detachably inserted, are arranged at a predetermined interval. These through-holes 170 have electrodes 1
69 has been inserted. These electrodes 169 are attached to the container 100.
Are arranged so as to face each other, and the respective tips extend, for example, to 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 rear surface of the main body 150, for example, two channel members 171 having a cross-sectional mouth shape and a predetermined length into which a fork (not shown) of a forklift is inserted are arranged so as to be parallel to each other. 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, the flow path 157 and the pipe 1 are pressurized.
When the molten aluminum is led out through 44,
So-called hot water remains less. Further, for example, the container 100 is tilted at the time of maintenance by tilting the flow path 157 and the pipe 144.
The angle at which the container 100 is tilted when the molten aluminum is led to the outside via the can be further reduced, and the safety and workability are improved.

As described above, in the container 100 according to the present embodiment, a member such as stalk exposed to the molten metal in the container 100 is unnecessary, and it is not necessary to replace parts such as 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 inside the container 100 is easily transferred to the flow path 157. 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.

Next, a metal supply system in which the transport vehicle according to the present invention is used will be described. FIG. 10 is a diagram showing the overall configuration of the metal supply system according to the embodiment of the present invention. As shown in the figure, the first factory 210 and the second factory 220 are provided, for example, at locations separated by a public road 230.

In the first factory 210, a plurality of die cast machines 211 as use points are arranged. Each die-casting machine 211 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. 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) 212 for temporarily storing molten aluminum before shot is arranged near each die-casting machine 211. Molten aluminum for a plurality of shots is stored in the holding furnace 212, and the holding furnace 21 is held for each shot via the ladle 213 or the pipe.
Molten aluminum is injected into the die-cast machine 211 from No. 2. In addition, each holding furnace 212
Includes a liquid level detection sensor (not shown) for detecting the liquid level of the molten aluminum stored in the container 100 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 211 or the central control unit 216 of the first factory 210.

The container 100 received by the receiving part of the first factory 210 is delivered to a predetermined die cast machine 211 by the carrier vehicle 1 according to the present invention, and the container 1
Molten aluminum is supplied to the holding furnace 212 from 00. The container 100 which has been supplied is returned to the receiving section by the transport vehicle 1.

The first factory 210 is provided with a first furnace 219 for melting and supplying aluminum to the container 100. The container 100 to which molten aluminum is supplied by the first furnace 219 is also provided. The carrier vehicle 1 delivers the product to a predetermined die-casting machine 211.

The first factory 210 is provided with a display section 215 for displaying the need for addition of molten aluminum in each die-casting machine 211. More specifically, for example, the die cast machine 2
A unique number is assigned to each 11 and the number is displayed on the display unit 215, so that the number on the display unit 215 corresponding to the number of the die cast machine 211 in which the molten aluminum needs to be added is turned on. It has become.
Based on the display on the display unit 215, the worker uses the carrier vehicle 1 to carry the container 100 to the die-casting machine 211 corresponding to the number and supply the molten aluminum. The display on the display unit 215 is performed by the control of the central control unit 216 based on the detection result of the liquid level detection sensor.

The second factory 220 is provided with a second furnace 221 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, the first factory 2
There are a plurality of types having different capacities depending on the capacity of the holding furnace 212 of the die-casting machine 211 in the unit 10. This second
1 supplied with molten aluminum by a furnace 221
00 is a truck 232 for transportation by a forklift.
Can be posted on. The truck 232 passes the public road 230 and is the first
The container 100 is designed to be transported to the receiving part of the factory 210 of the above. Further, the empty container 100 in the receiving section is designed to be returned to the second factory 20 by the truck 232.

The second factory 220 includes the first factory 210
In each of the die-casting machines 211 in, a display unit 222 is arranged to display molten aluminum when it becomes necessary to add it. The configuration of the display unit 222 is almost the same as that of the display unit 215 arranged in the first factory 210. The display on the display unit 222 is performed by the control of the central control unit 216 in the first factory 210 via the communication line 233, for example. In addition, in the display part 222 in the second factory 220, the die-casting machine 21 that requires the supply of molten aluminum is used.
The die-casting machine 211 determined to supply molten aluminum from the first furnace 219 in the first factory 210 among the other die-casting machines
11 is displayed separately. For example, the die cast machine 211 thus determined
The number corresponding to is blinking. As a result, the second aluminum is supplied to the die casting machine 211 which is determined to be supplied with the molten aluminum from the first furnace 219.
It is possible to prevent erroneous supply of molten aluminum from the factory 220 side. Also, this display unit 2
In addition to the above, the data transmitted from the central control unit 216 is also displayed at 22.

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

The central control unit 216 monitors the amount of molten aluminum in each holding furnace 212 via the liquid level detection sensor provided in each holding furnace 212. Here, when it is necessary to supply molten aluminum to a holding furnace 212, the central control unit 216 detects the “unique number” of the holding furnace 212 by a temperature sensor provided in the holding furnace 212. "Temperature data" of the holding furnace 212,
The “morphological data” regarding the form of the holding furnace 212, the final “time data” when the molten aluminum disappears from the holding furnace 212, the “traffic data” of the public road 230, and the “amount of molten aluminum required in the holding furnace 212. "Data" and "temperature data"
3 to the second factory 220 side. In the second factory 220, these data are displayed on the display unit 222. Based on these displayed data, the operator empirically finds that the container 100 reaches the holding furnace 212 immediately before the molten aluminum runs out of the holding furnace 212, and the molten aluminum at that time reaches a desired temperature. The shipping time of the container 100 from the factory 220 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), and the container 100 reaches the holding furnace 212 immediately before the molten aluminum disappears from the holding furnace 212 using a predetermined software, and the molten aluminum at that time has a desired temperature. Thus, the shipping time of the container 100 from the second factory 220 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 221 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 2 with container 100 placed at the time of shipment
When 32 starts and arrives at the first factory 210 through the public road 230, the container 100 is received from the truck 232 in the receiving section.

Thereafter, the received container 100 is delivered to a predetermined die casting machine 211 by the carrier vehicle 1, and molten aluminum is supplied from the container 100 to the holding furnace 212.

(Embodiment 2) Another example of 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.
This will be described with reference to FIG. Container 10 shown in FIGS. 11 to 13.
1 is different from the above embodiment in the structure of the flow path. That is, inside the frame 101a, a lining 101b having a convex portion 101c which is a continuous bulge inward along the vertical direction is provided. Lining 101b
Is preferably 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, the 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 pipe diameter as described above, the pressure required to supply the molten aluminum can be reduced. This means that by adopting such a container, the stop time of the molten metal can be shortened without reducing the supply amount of the molten metal per unit time. For example, when the pressurized gas in the container is opened to the atmosphere via the leak valve 28 or the emergency stop unit 9, for example, the smaller the pressurization pressure (that is, the smaller the pressure in the container) is before returning to the atmospheric pressure. This is because the time required is short. Even if the pressurization is stopped, the molten metal continues to be supplied to the outside unless the pressure in the container is released. Therefore, by setting the pipe diameter as described above, the safety at the time of stopping the supply can be improved. Further, the function of the container as described here, in combination with the arrangement of the emergency stop portion and the filter of the present invention,
It improves the safety when the supply is stopped. From this point of view, this container is indispensable for solving the problems of the present invention.

Further, by setting the inner diameter of the pipe as described above, the pressure required for transporting (lifting) 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 for preparing the gas required for pressurization 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. In this case, the inner diameter of the flow passage 109 of the pressurized gas is slightly larger than the inner diameter of the pipe 108 because the portion where the molten aluminum is lifted against the gravity is the flow passage 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.

FIG. 14 illustrates a container which is used in the present invention or in the use of the method of the present invention and which is essential for solving the problems of the present invention.

The container 201 has a structure in which a heat insulating material 72 and a fireproof material 73 are laminated as a lining inside a frame 71. A board material 74 is inserted between the heat insulating material 72 and the refractory material 73 at a predetermined position. 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 7 is tightened with bolts between these flanges.
6 and the large lid 78 are fixed.

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 bending strength against mechanical stress from the outside, and the strength becomes relatively low when the bulk specific gravity is large. 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 circumference of the main body 76 through the opening 85 provided at the inner circumference 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 on 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.

A pipe whose inner surface is lined, for example, is detachably connected to the upper portion of the flow path 75. 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. 15 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. 16 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. 17 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.

Further, the container 501 has a bottomed and tubular body 5
A large lid 378 is arranged in the upper opening 377 of 02, and the main body 502 and the large lid 378 are fixed by tightening bolts between these flanges.

Further, the bolt with the handle is rotated in the reverse direction to release the fastening so that the hatch 380 is opened in the opening 37 of the large lid 378.
It can be opened from 9. Then, with the hatch 380 opened, maintenance of the inside of the container 501 and insertion of a gas burner at the time of preheating are performed through the opening 379.

The opening 3 is provided in the center of the large lid 378.
79 is provided, and the hatch 3 that can be opened and closed is provided in the opening 379.
80 are arranged. 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 end of the pipe,
A tank for accumulating pressurized gas and a pressurizing pump are connected to the pressurizing pipe, and a depressurizing pump is connected to the depressurizing pipe. Then, it is possible to introduce molten aluminum into the container 201 by utilizing the pressure difference by depressurization, and by utilizing the pressure difference by pressurization.
1. Molten aluminum can be discharged to the outside.

FIG. 18 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 present invention is not limited to the above embodiments,
Various modifications are possible.

[0105]

As described above, according to the present invention,
For example, in case of an emergency, it is possible to surely stop the pressurization to the container with a very simple operation. In addition, the time to stop can be shortened and the safety can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of a transport vehicle according to an embodiment of the present invention.

FIG. 2 is a plan view of the transport vehicle shown in FIG.

FIG. 3 is a diagram showing a configuration of a pressurizing / depressurizing unit according to an embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of an emergency stop unit according to an embodiment of the present invention.

FIG. 5 is a sectional view of an emergency stop unit in a first mode (normal time).

FIG. 6 is a sectional view of an emergency stop unit in a second mode (during emergency stop).

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 schematic diagram showing a configuration of a metal supply system according to 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 an example of a container used in the present invention.

[Explanation of symbols]

1 carrier 4 pressurizing / depressurizing unit 5 receiver tank 6 Air compressor 9 Emergency stop 10 levers 11, 38, 45 Piping 12 Air hose 13, 14 Joint part 15 forks 16 Lifting mechanism 41 three-way valve 42 First valve 43 Second valve mouth 44 Third valve mouth 100 containers

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI B22D 41/50 510 B22D 41/50 510 41/54 41/54 (56) Reference JP-A-51-123725 (JP, A) JP-A 1-262062 (JP, A) JP-A 2001-138033 (JP, A) JP-A 2002-316256 (JP, A) JP-A 2002-263828 (JP, A) JP-A 2002-316258 (JP, A) ) Ukaikai Sho 57-170867 (JP, U) Ukaikai Hei 3-31063 (JP, U) U.S. Patent No. 5916471 (US, A) (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 pressure adjusting device capable of containing a molten metal and utilizing a pressure difference to adjust the pressure in a container capable of flowing the molten metal between the outside and the container, the pressure adjusting device being supplied to the container. An output unit for outputting a pressurized gas, a flow path for supplying a pressurized gas from the output unit to the container, and a gas inserted between the flow path and the output unit side and the container side. A switching valve capable of manually switching between a first mode for allowing flow and a second mode for allowing gas to flow between the container side and a connection port open to the atmosphere. A pressure adjusting device . 2. A pressure control device according to claim 1, the pressure regulating device characterized by comprising a relief valve or a leak valve connected to the flow channel. 3. The pressure adjusting device according to claim 2, wherein a part of the flow path is configured by an air hose for connecting to the container, and the switching valve and a connecting portion of the air hose. A pressure adjusting device , wherein a filter is inserted between the pressure adjusting device and the pressure adjusting device . 4. A pressure adjusting device 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 pressure adjusting device being supplied to the container. An output unit for outputting pressurized gas, an exhaust unit for exhausting gas from the container, a first mode for switching between a pressurizing mode for pressurizing the container and an exhaust mode for exhausting the container. A switching valve; a first flow path between the output unit and the first switching valve; a second flow path between the exhaust unit and the first switching valve; A third flow path communicating from the switching valve to the container side, and a first flow path that is inserted into the third flow path and allows gas to flow between the first switching valve side and the container side. Mode,
The pressure regulating device characterized by comprising a second switching valve and a second mode which allows flow of gas can be switched by manually between a connection port to be opened on the container side with the atmosphere . 5. The method according to claim 1, wherein the first mode and the second mode are exclusively switched by the same single operation. pressure adjusting device. 6. (a) The molten metal can be contained, the molten metal can be circulated between the outside by utilizing the pressure difference, and the inside can be added.
A container not equipped with an atmosphere release valve when the molten metal is pressurized and supplied to the use point; and (b) a pressure adjusting device that adjusts the pressure in the container, the pressurized gas supplied to the container. An output part for outputting a flow path for supplying pressurized gas from the output part to the container, and a flow path interposed between the output part side and the container side. a first mode and a pressure regulating device comprising a switching valve and a second mode which allows flow of gas can be switched by manually between the connection port and which is opened to the container side and the atmosphere to And a molten metal supply system. 7. The molten metal supply system according to claim 6, wherein the pressure adjusting device has an atmosphere release valve connected to the flow path. 8. The molten metal supply system according to claim 6 or 7, wherein the pressure adjusting device is mounted.
Both of them further include a transportation vehicle that holds and transports the container.
And third, a portion of the flow path is constituted by an air hose for connection to the container, the end of the air hose is detachably connected to the first joint part provided in the container 2 joint parts are provided, a pair of channel members are provided on the bottom surface of the bottom of the container, and the transport vehicle further includes a fork part that can be inserted into and removed from the channel members. Metal supply system. 9. The molten metal supply system according to claim 8, wherein the pressure adjusting device further includes a filter interposed between the switching valve and the connection portion of the air hose. Characterized molten metal supply system. 10. (a) Molten metal can be accommodated, the molten metal can flow through a flow path having an inner diameter of 65 mm to 85 mm between the outside and a pressure difference, and the inside can be pressurized.
A container dedicated air release valve is not mounted when supplying the molten metal to the point of use Te, (b) a transport vehicle for transporting and holding the container, outputting the pressurized gas supplied to the container An output part, a flow path for supplying a pressurized gas from the output part to the container, and a flow path interposed between the output part and the container side so that the gas can flow. A transport vehicle including a switching valve capable of manually switching between a first mode and a second mode in which gas can flow between the container side and a connection port open to the atmosphere is used. In the method of supplying molten metal to the use point, the container storing the molten metal is held and transported to the use point by the carrier vehicle, and the atmosphere release valve is not installed at the use point. In the state of the remains held by said carrying vehicle,
Setting the switching valve to the first mode, supplying pressurized gas into the container by the transport vehicle to supply molten metal from the container to the use point, and supplying molten metal from the container to the use point The method of supplying molten metal, wherein the switching valve is switched from the first mode to the second mode when the emergency stop is performed. 11. A carrier vehicle capable of carrying a container capable of containing a molten metal, wherein the container is a carrier vehicle.
A vehicle equipped with the pressure adjusting device according to any one of 1. 12. The transport vehicle according to claim 11, wherein a part of the flow path is formed by an air hose for connecting to the container, and the end of the air hose is provided in the container. A second joint portion that is detachably connected to the first joint portion that is provided, and a fork portion that can be inserted into and removed from a pair of channel members provided on the back surface of the bottom of the container. Characteristic transport vehicle.