JP2007061906A - Device and method for transferring molten metal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a device and a method for transferring molten metal using a practicable siphonic phenomenon. <P>SOLUTION: The invented molten metal transferring device is equipped with a suction pipe of which the inlet is submerged in the molten metal held in a molten metal feeder and the other end extends upward, a discharge pipe of which the outlet is submerged in the molten metal held in a molten metal receiver and the other end extends upward, and a U-tube of which the upper portion of one leg is connected with the other end of the suction pipe and the upper portion of the other leg is connected with the other end of the discharge pipe. The top of the joining portion between the other end of the suction pipe and the upper portion of one leg of the U-tube, and the top of the joining portion between the other end of the discharge pipe and the upper portion of the other leg of the U-tube are respectively kept at negative pressures lower than pressures of the molten metals held in the molten metal feeder and held in the molten metal receiver. The molten metal is transferred, by using the siphonic phenomenon, from the molten metal feeder to the molten metal receiver in which the molten metal is held at a liquid level lower than in the molten metal feeder. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a molten metal transfer device and transfer method for transferring a high-temperature molten metal such as molten aluminum from a predetermined hot water supply container to a predetermined hot water receiving vessel, and more particularly to a transfer device and transfer method using a siphon phenomenon. It is.

  Conventionally, the high-temperature molten metal is transferred by, for example, taking a molten metal from a melting furnace into a ladle and pouring it into a mold or dropping the molten metal by using a stopper at the bottom of the melting furnace. However, such a transfer is dangerous because of the nature of the high-temperature molten metal, and since the molten metal is in direct contact with the atmosphere, it is easily oxidized and causes a deterioration in quality.

Therefore, in order to solve the above-described problems, an upright vertical U-shaped pipe is connected between the suction pipe and the discharge pipe and the closed distillation tank, and an inert gas supply / discharge unit is connected to the vertical vertical U-shaped pipe. (Refer to Patent Document 1) or a U-tube is connected between a sealed storage tank connected to a molten metal suction pipe and a transfer destination, and an inert gas is supplied to the sealed storage tank and the U-tube. A metal melt pump (see Patent Document 2) and the like, each of which is connected with a discharging means, has been proposed.
JP-A-5-84563 JP-A-5-84564

  The molten metal pumps described in Patent Documents 1 and 2 are configured to transfer a molten metal from a melting furnace to a mold using pressurization and pressure reduction by a supply / exhaust pipe. By improving and preventing air intrusion, oxidation of the molten metal during transfer can be suppressed, and an excellent effect for quantitative transfer of the molten metal can be exhibited.

  By the way, when transferring the molten metal, the molten metal is transferred from the hot water supply container using a siphon phenomenon in which the liquid level of the molten metal stored in the hot water supply container is lower than the liquid level of the molten metal. It has been tried.

  However, there has not been proposed a method and apparatus for transferring molten metal using a siphon phenomenon that can be used practically.

  For example, as shown in FIG. 16, a molten metal (aluminum molten metal) 103 is changed from the hot water supply container 101 to the hot water receiving container 102 via a pipe 104 made of a heat-resistant material by using arrows 107a, 107b, 107c. As shown in the figure, the liquid level 103b of the molten metal 103 accommodated in the hot water receiving container 102 is lower than the liquid level 103a of the molten metal 103 accommodated in the hot water supply container 101. If the molten metal 103 in the hot water supply container 101 and the molten metal 103 in the hot water receiving container 102 are communicated with each other through the pipe 104 in a state where the molten metal 103 is filled in the pipe 104, the pipe is caused by siphon phenomenon. The molten metal 103 should be transferred from the hot water supply container 101 to the hot water receiving container 102 via 104.

  However, in reality, it is not ideal as described above, and the portion indicated by the reference numeral 108 of the pipe 104 (that is, the liquid surface 103b of the molten metal 103 accommodated is the hot water supply container that is the starting side. An unstable flow occurs in the molten metal 103 in the hot metal receiving container 102 that is lower than the liquid level 103a of the molten metal 103 accommodated in 101) (observation as a transparent tube). Then, it was concluded that a gas portion was generated), and finally the flow indicated by the arrows 107a and 107b became impossible and the molten metal 103 did not rise as indicated by the arrow 107a.

  If the portion indicated by reference numeral 103 in FIG. 16 is made of water instead of a molten metal and similarly transferred using the siphon phenomenon, the portion of the pipe 104 indicated by reference numeral 108 is also flowing in the flowing water. It can be observed that a gas part is formed in and the flow becomes unstable.

  In the case of water, the transfer using the siphon phenomenon can be continued even in such a case. However, in the case of molten metal, this is impossible in practice.

  This is because a molten metal such as molten aluminum has a specific gravity greater than that of water, and is between the upper end side of the portion indicated by reference numeral 108 of the pipe 104 and the liquid surface 103b of the molten metal 103 in the hot water receiving container 102. It is considered that the flow destabilizing factor due to the pressure difference due to the difference in height of the pipe becomes large, and the gas part generated in the portion indicated by reference numeral 108 of the pipe 104 is significantly expanded by the high-temperature molten metal, and the flow is reduced. It may be because of destabilization.

  Therefore, with regard to the transfer of molten metal using the siphon phenomenon, before the realization of the improvement of the working environment in the transfer of hot molten metal and the prevention of oxidation of the molten metal by preventing air intrusion, In particular, a method and apparatus for transferring a molten metal using a siphon phenomenon has not been proposed.

  Therefore, the present invention aims to improve the working environment in transferring high-temperature molten metal, and can suppress the oxidation of the molten metal by preventing air from entering the molten metal during transfer, and is a practically usable siphon phenomenon. It is a daily idea to propose an apparatus and a method for transferring molten metal using metal.

  In order to solve the above problems, the inventor has a suction pipe inserted into the molten metal accommodated in the hot water supply container and the other end side of the molten metal accommodated in the hot water receiving container. A discharge pipe having a discharge port inserted therein and the other end side extending upward, and the upper end of one pipe connected to the other end side of the suction pipe and the other pipe side above the other pipe A molten metal transfer device including a U-tube connected to the side, an upper portion of a connection portion between the other end of the suction tube and the upper side of one of the U-tubes, and the other end of the discharge tube Maintaining the upper side of the connecting portion between the side and the upper side of the other pipe of the U-shaped pipe in a negative pressure state where the pressure is lower than the pressure received by the molten metal housed in the hot water supply container and the hot water receiving container, The molten metal is transferred from the hot water supply container to the hot water receiving container through the suction pipe, the U-shaped pipe, and the discharge pipe using the siphon phenomenon. In this case, the negative pressure at the upper part of the connection portion between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe is changed to one of the other end side of the suction pipe and the U-shaped pipe. By maintaining the pressure lower than the negative pressure at the upper part of the connection with the upper side of the pipe, the liquid level of the molten metal contained from the hot water container is higher than the liquid level of the molten metal contained in the hot water container. The present invention has been completed by finding that it is possible to transfer a molten metal using a low hot water receiving vessel hesiphon phenomenon.

  In addition, the present invention is a transfer device that transfers a molten metal from a hot water supply container using a siphon phenomenon in which a liquid level of the molten metal stored in the hot water container is lower than that of the molten metal stored in the hot water container. A suction port is inserted into the molten metal accommodated in the hot water supply container and the other end side extends upward, and a discharge port is inserted into the molten metal accommodated in the hot water receiving container. The other end side of the discharge pipe, the transfer pipe connecting the other end side of the suction pipe and the other end side of the discharge pipe, and the inside of the transfer pipe being atmospheric pressure A negative pressure maintaining mechanism that maintains a predetermined negative pressure at a lower pressure uses a molten metal transfer device connected to the transfer pipe, and the inside of the transfer pipe has a predetermined negative pressure lower than atmospheric pressure. Maintained in a pressurized state by the siphon phenomenon from the hot water supply container to the hot water receiving container. And it found that becomes possible to transfer the hot water is obtained and completed the present invention.

  That is, the method for transferring a molten metal proposed by the present invention utilizes the siphon phenomenon of a hot water receiving container where the liquid level of the molten metal is lower than the liquid level of the molten metal stored in the hot water container. The metal melt is transferred.

  In this method, a suction port is inserted into the molten metal accommodated in the hot water supply container and the other end side extends upward, and a discharge port is formed in the molten metal accommodated in the hot water receiving container. Is connected to the other end of the suction pipe, and the upper side of the other pipe is connected to the upper side of the other pipe. A molten metal transfer device having a U-shaped tube is used.

  In this method, the upper part of the connection portion between the other end side of the suction pipe and the upper side of one pipe of the U-shaped pipe, the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe, The upper part of each of the connection parts is maintained in a negative pressure state where the pressure is lower than the pressure received by the molten metal contained in the hot water supply container and the hot water receiving container, respectively, via the suction pipe, the U-shaped pipe and the discharge pipe Then, the molten metal is transferred from the hot water supply container to the hot water receiving container using the siphon phenomenon.

  At this time, in the method of the present invention, the negative pressure at the upper part of the connection portion between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe is changed to the other end side of the suction pipe. Maintaining a pressure lower than the negative pressure at the upper part of the connection between the upper part of the U-tube and one of the U-tubes, the hot water container hesiphon from the hot water container through the suction pipe, U-shaped pipe, and discharge pipe It is characterized by transferring the molten metal using the phenomenon.

  Next, the transfer device for transferring the molten metal proposed by the present invention has a siphon phenomenon in which the liquid level of the molten metal stored in the hot water container is lower than that of the molten metal stored in the hot water container. The metal melt is transferred by using it and has the following configuration.

  The molten metal transfer device includes a suction pipe inserted into the molten metal accommodated in the hot water supply container and the other end side extending upward, and the molten metal accommodated in the hot water receiving container. A discharge pipe into which the other end side extends upward, and an upper side of one pipe is connected to the other end side of the suction pipe, and an upper side of the other pipe is connected to the other end side of the discharge pipe. A first suction means connected via an opening / closing means to a U-tube to be connected, a connection portion between the other end of the suction pipe and the upper side of one of the U-tubes; and the discharge A second suction means connected via an opening / closing means is provided above a connecting portion between the other end side of the tube and the upper side of the other tube of the U-shaped tube.

  In the molten metal transfer device of the present invention, the first suction means and the second suction means are configured to adjust the pressure above the connection portion between the other end of the discharge pipe and the upper side of the other pipe of the U-shaped pipe. However, the pressure can be controlled to be lower (smaller) than the pressure above the connecting portion between the other end of the suction pipe and the upper side of one of the U-shaped pipes.

  The molten metal transfer method of the present invention using the molten metal transfer device of the present invention comprises the following steps.

  First, by closing the upper part of the connection portion between the other end of the discharge pipe and the upper side of the other pipe of the U-shaped pipe, the first suction means is operated to suck the molten metal in the hot water supply container The molten metal exists at least beyond the bottom of the U-shaped tube and below the other tube of the U-shaped tube, and in this state, the suction by the first suction means is stopped, and the suction The upper part of the connecting portion between the other end of the tube and the upper side of one of the U-shaped tubes is closed in a negative pressure state.

  Subsequently, the second suction means is operated to suck the molten metal in the hot water receiving container through the discharge pipe, and the other pipe of the U-shaped pipe, one pipe of the U-shaped pipe, and the suction pipe The molten metal is sucked from the hot water supply container through the connection portion between the other end side and the upper side of one of the U-shaped tubes and the suction tube, and the other end of the suction tube, the suction tube and one of the U-shaped tubes The hot water supply through a connection part with the upper side, one pipe of the U-shaped pipe, the other pipe of the U-shaped pipe, a connection part between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe, and the inside of the discharge pipe The molten metal is continued from the container to the hot water receiving container.

  And here, the suction by the second suction means is stopped, and the upper part of the connection part between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe is closed in a negative pressure state, While maintaining a negative pressure above the connecting portion between the other end of the suction pipe and the upper side of one of the U-shaped pipes, the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe The molten metal is transferred from the hot water supply container to the hot water receiving container by a siphon phenomenon while maintaining the upper portion of the connecting portion in a negative pressure state.

  Also in the method for transferring molten metal according to the present invention using such a molten metal transfer device according to the present invention, as described above, the connection between the other end of the discharge pipe and the upper side of the other U-shaped pipe is performed. The negative pressure at the upper part of the suction part is maintained at a lower pressure than the negative pressure at the upper part of the connection part between the other end side of the suction pipe and the upper side of one of the U-shaped pipes. Then, the molten metal is transferred from the hot water supply container to the hot water receiving container through the U-shaped tube and the discharge pipe using the siphon phenomenon.

  Furthermore, another metal molten metal transfer device proposed by the present invention utilizes a hot water receiving container hesiphon phenomenon in which the molten metal level is lower than the molten metal level stored in the hot water container. A transfer device for transferring the molten metal, wherein a suction port is inserted into the molten metal accommodated in the hot water supply container and the other end side extends upward, and is accommodated in the hot water receiving container. A discharge pipe in which a discharge port is inserted into the molten metal and the other end side extends upward; a transfer pipe connecting the other end side of the suction pipe and the other end side of the discharge pipe; The negative pressure maintaining mechanism for maintaining the inside of the transfer pipe in a predetermined negative pressure state whose pressure is lower than the atmospheric pressure is connected to the transfer pipe.

  According to another method for transferring molten metal of the present invention using this molten metal transfer device, the inside of the transfer pipe is maintained at a predetermined negative pressure lower than atmospheric pressure, and the hot water supply container is moved to the hot water supply container. The molten metal is transferred using the hot water receiving container hesiphon phenomenon in which the liquid level of the molten metal stored in the container is lower than that of the molten metal.

  Here, in the molten metal transfer device, it is desirable that at least the flow path cross-sectional area on the other end side of the suction pipe is larger than the flow path cross-sectional area of the discharge pipe. The transfer pipe is provided with a hot water surface height detecting means for detecting a hot water surface height of the molten metal flowing in the transfer pipe, and the transfer pipe detected by the hot water surface height detecting means. It is desirable that the state of the negative pressure inside the transfer pipe maintained by the negative pressure maintaining mechanism is controlled according to the molten metal surface height of the molten metal flowing inside.

  According to the present invention, a metal melt transfer device and method using a siphon phenomenon that can be used in practice, which improves the working environment in transferring a high temperature metal melt and allows air to enter the metal melt during transfer. It is possible to provide a molten metal transfer device and method that can prevent the molten metal from being oxidized and prevent oxidation.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the first method of the present invention will be described with reference to FIGS.

  The method for transferring the molten metal of the present invention is from the hot water supply container 61 to the hot water receiving container 62 where the liquid level 63b of the molten metal 63 contained is lower than the liquid level 63a of the molten metal 63 contained in the hot water supply container 61. In this method, the molten metal is transferred using a siphon phenomenon.

  In this method, a suction port 64 a is inserted into the molten metal 63 accommodated in the hot water supply container 61 and the other end side extends upward, and the molten metal 63 accommodated in the hot water receiving container 62. The discharge pipe 65 is inserted into the discharge pipe 65 and the other end of the discharge pipe 65 extends upward. The other end of the suction pipe 64 is connected to the upper side of one pipe 66 a, and the other end of the discharge pipe 65 is connected to the other pipe. This is performed using a molten metal transfer device including a U-shaped tube 66 to which the upper side of 66b is connected.

  The upper end of the connection portion between the other end side of the suction pipe 64 (upper side in FIG. 11) and the upper side of one pipe 66a of the U-shaped pipe 66 and the other end side of the discharge pipe 65 (upper side in FIG. 11). And the upper part of the connection portion between the upper side of the other pipe 66b of the U-shaped pipe 66 and a negative pressure state where the pressure is lower than the pressure received by the molten metal 63 accommodated in the hot water supply container 61 and the hot water receiving container 62, respectively. And using the siphon phenomenon from the hot water supply container 61 to the hot water receiving container 62 as indicated by arrows 69, 70, 71, 72, 73, 74 through the suction pipe 64, U-shaped pipe 66, and discharge pipe 65. It transports molten metal.

In the embodiment shown in FIG. 11, the pressure received by the molten metal 63 accommodated in the hot water supply container 61 and the hot water receiving container 62 is atmospheric pressure. In the state shown in the figure, the suction pipe 64 is sucked in the direction of the arrow 67 from the upper part of the connection portion between the other end side (upper side in FIG. 11) and the upper side of one pipe 66a of the U-shaped pipe 66, and discharged. Suction is performed in the direction of arrow 68 from the upper part of the connection between the other end side of the tube 65 (upper side in FIG. 11) and the upper side of the other tube 66b of the U-shaped tube 66. Accordingly, the pressure P _{A at} the upper part of the connection portion between the other end side of the suction pipe 64 (upper side in FIG. 11) and the upper side of one pipe 66a of the U-shaped pipe 66, and the other end side of the discharge pipe 65 (FIG. 11). The pressure P _B at the upper part of the connection between the middle and upper side) and the upper side of the other pipe 66b of the U-shaped pipe 66 is set to a negative pressure state where the pressure is lower than the atmospheric pressure.

In addition, the suction pipe 64 is connected with the negative pressure P _B at the upper part of the connection portion between the other end side of the discharge pipe 65 (upper side in FIG. 11) and the upper side of the other pipe 66b of the U-shaped pipe 66. of (in FIG. 11, upper) end side and pressure than the negative pressure P _a at the top of the connecting portion between the upper one of the tubes 66a of the U-shaped tube 66 is maintained at a low state. That is, the suction in the directions of the arrows 67 and 68 is adjusted so that P _B <P _A and the pressures P _A and P _B are maintained in this state, and the suction pipe 64, the U-shaped pipe 66, and the discharge pipe are maintained. As shown by arrows 69, 70, 71, 72, 73 and 74, the molten metal is transferred from the hot water supply container 61 to the hot water receiving container 62 using the siphon phenomenon.

In this case, for example, as shown in FIG. 12, a metal melt transfer device similar to that shown in FIG. 11 (the suction port 64a is inserted into the melt 63 accommodated in the hot water supply container 61 and the other end is A suction pipe 64 extending upward, a discharge pipe 65 having a discharge port 65b inserted into the molten metal 63 accommodated in the hot water receiving container 62, and the other end of the suction pipe 64 extending upward. The upper side of one pipe 66a is connected to the side, and the U-shaped pipe 66 is connected to the other end side of the discharge pipe 65 and the upper side of the other pipe 66b), and the pressure P _A , It is in the P _B in a negative pressure state lower than the atmospheric pressure, so that the P _B> P _a, i.e., the direction of the pressure P _B, to be in a larger pressure P _a (high) state, As shown in FIG. 12, the portion indicated by reference numeral 80 in FIG. Gas portion is formed, eventually, it becomes impossible to transport the molten metal to.

  This seemed to be caused by the same cause as described with reference to FIG. 16 in the background art section.

However, in the method of the present invention, the pressures P _A and P _B are each maintained at a negative pressure lower than the atmospheric pressure (pressure received by the molten metal 63 accommodated in the hot water supply container 61 and the hot water receiving container 62). not only towards the pressure P _B in the discharge side, by the lower (smaller) than the pressure P _a in the suction side, it was to enable the transport of molten metal, such as in Figure 11 shown.

  Next, the molten metal transfer device of the present invention will be described.

  FIG. 1 is a conceptual cross-sectional view of a first embodiment of a molten metal transfer device of the present invention. FIG. 2 is also a conceptual control diagram.

  The molten metal transfer device 6 of the present invention is a transfer device that transfers the molten metal from the hot water supply container 1 to the hot water receiving container 5 using the siphon phenomenon. In particular, as shown in FIG. 1, a hot water supply container 1 utilizing a siphon phenomenon using a hot water receiving container 5 having a lower liquid level 8 of the molten metal 7 accommodated than the liquid level 3 of the hot water supply 2 accommodated in the hot water supply container 1. It is the transfer apparatus which transfers a molten metal from.

  The molten metal transfer device 6 mainly includes a suction pipe 10, a discharge pipe 11, a U-shaped pipe 9, a first suction means (vacuum pump) 16 (FIG. 2), and a second suction means (vacuum pump) 22. (FIG. 2).

  As shown in FIG. 1, the suction pipe 10 has a suction port 10 a inserted in the molten metal 2 accommodated in the hot water supply container 1, and the other end side extends upward.

  As for the discharge pipe 11, the discharge port 11a is inserted in the molten metal 7 accommodated in the hot water receiving container 5, and the other end side is extended upwards.

  The upper side of one tube 9a of the U-shaped tube 9 is connected to the other end side of the suction tube 10, and the upper side of the other tube 9b of the U-shaped tube 9 is connected to the other end side (upper side in FIG. 1) of the discharge tube 11. It is connected.

  The vacuum pump 16 as the first suction means is connected to the other end side (upper side in FIG. 1) of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9 through the electromagnetic valve 15 as the opening / closing means. Is connected above the connecting portion (FIG. 2).

  In the embodiment shown in FIG. 1, as shown in FIG. 2, a vacuum pump 16 is connected via a solenoid valve 15 to a vertical pipe 14 in a portion where one pipe 9 a of the U-shaped pipe 9 extends upward. .

  However, as shown in FIG. 3, a vertical pipe 14 is connected to a horizontal pipe 12 connecting the other end side of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9, and an electromagnetic valve 15 is connected thereto. It is also possible to connect the vacuum pump 16 via the.

  The vacuum pump 22 as the second suction means is connected to the other end side (the upper side in FIG. 1) of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9 through the electromagnetic valve 21 as the opening / closing means. It is connected above the connection part. In the embodiment shown in FIG. 1, as shown in FIG. 2, a vacuum pump 22 is connected via a solenoid valve 21 to a vertical pipe 20 in a portion where the other pipe 9 b of the U-shaped pipe 9 extends upward. .

  Although not shown, the form of the connecting portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped tube 9 is the same as the other end side (upper side in FIG. 1) of the suction pipe 10. Between the other end side (upper side in FIG. 1) of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9 as in the form of a connection portion of the U-shaped pipe 9 with the upper side of one pipe 9a. Can be connected by a horizontal tube.

  Similarly, although not shown, the form of the connecting portion between the other end side of the suction pipe 10 (upper side in FIG. 1) and the upper side of one pipe 9a of the U-shaped pipe 9 is the other end side of the discharge pipe 11. As in the form of a connection portion between the upper portion of the U-tube 9 and the upper side of the other tube 9b, it is possible to adopt a connection configuration without using a horizontal tube.

  In the molten metal transfer device 6 of the present invention described above, the first suction means and the second suction means described above are the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9. It is possible to control the pressure above the connecting portion to be lower (smaller) than the pressure above the connecting portion between the other end side of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped tube 9. Can be.

  The molten metal transfer method of the present invention using the molten metal transfer device 6 according to the first embodiment of the present invention described above with reference to FIGS. 1 to 3 is executed as follows.

  First, by closing the electromagnetic valve 21, the upper part of the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9 is closed. In this state, the electromagnetic valve 15 is opened and the vacuum pump 16 is operated to suck the molten metal 2 in the hot water supply container 1. This ensures that the molten metal exists at least beyond the bottom 9c of the U-shaped tube 9 and below the other tube 9b of the U-shaped tube 9. In this state, the suction by the vacuum pump 16 is stopped and the solenoid valve 15 is closed, so that a negative pressure is applied above the connection portion between the other end of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9. Close in state.

  Specifically, first, as shown in FIG. 4, the solenoid valve 21 is closed to close the upper part of the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9 b of the U-shaped pipe 9. The solenoid valve 15 is opened and the vacuum pump 16 is operated, so that the vertical pipe 14 above the connecting portion between the other end side of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9 is indicated by an arrow 40a. To suck.

  As a result, the molten metal 2 accommodated in the hot water supply container 1 is sucked into the suction pipe 10 as indicated by an arrow 41 and flows as indicated by arrows 42, 43, and 44, so that at least the bottom 9 c of the U-shaped pipe 9 is moved. After that, it reaches the lower side of the other tube 9b of the U-shaped tube 9.

  Moreover, since it is attracted | sucked in the arrow 40a direction above the vertical pipe 14, the molten metal raises to the position shown with the code | symbol 50a in the vertical pipe 14, for example.

  On the other hand, since the upper part of the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped tube 9 is closed, the molten metal is sucked from the hot water receiving container 5 as indicated by an arrow 45, The discharge pipe 11 is raised.

  At this time, in the suction pipe 10, the height H1 from the molten metal surface 3 of the molten metal 2 of the hot water supply container 1 to the connection portion between the other end side of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9 (FIG. 1) is the height H2 from the molten metal surface 8 of the molten metal 7 of the hot water receiving container 5 to the connecting portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped tube 9 in the discharge pipe 11. If smaller than (FIG. 1) (that is, if H2> H1), as shown in FIG. 4, the upper end of the hot water supply 7 sucked from the hot water receiving container 5 stops in the discharge pipe 11, while the hot water supply container The molten metal 2 sucked from 1 through the suction pipe 10 reaches at least the bottom portion 9c of the U-shaped tube 9 and reaches the lower side of the other tube 9b of the U-shaped tube 9.

  Next, as shown in FIG. 5, the vacuum pump 16 is stopped and the solenoid valve 15 is closed while the upper part of the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9 b of the U-shaped pipe 9 is closed. And the upper part of the connection portion between the other end side of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9 is opened.

  As a result, the molten metal existing in the horizontal pipe 12 returns to the hot water supply container 1 via the suction pipe 10 on the one hand as indicated by an arrow 46 and flows on the other hand as indicated by arrows 43 and 44. It remains in the one tube 9a of the character tube 9 and the other tube 9b so that the height of the molten metal surface is the same.

  Further, the molten metal sucked into the discharge pipe 11 in FIG. 4 returns to the hot water receiving container 5 as indicated by an arrow 47.

  Next, as shown in FIG. 6, the solenoid valve 15 is opened again with the upper end of the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped tube 9 closed, and the vacuum The pump 16 is operated, and suction is performed as indicated by an arrow 40a from the vertical pipe 14 above the connection portion between the other end of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9.

  As a result, the molten metal 2 in the hot water supply container 1 is sucked into the suction pipe 10 as indicated by an arrow 41. On the other hand, since the upper part of the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped tube 9 is closed, the molten metal is sucked from the hot water receiving container 5 as indicated by an arrow 45, The discharge pipe 11 is raised.

  And the molten metal which existed in the other pipe | tube 9b of the U-shaped pipe 9 moves to the direction of arrow 48, and although the liquid level becomes lower than the state shown in FIG. The state where the molten metal exists at least beyond the bottom 9c of the U-shaped tube 9 and below the other tube 9b of the U-shaped tube 9 is maintained (FIG. 6).

  Moreover, since it is attracted | sucked in the arrow 40a direction above the vertical pipe 14, in the vertical pipe 14, a molten metal raises to the position shown with the code | symbol 50b, for example.

  In the state shown in FIG. 6, the suction by the vacuum pump 16 is stopped and the electromagnetic valve 15 is closed, so that the other end of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9 are closed. The upper part of the connection part is closed in a negative pressure state.

  That is, since the suction by the vacuum pump 16 is performed as in the above-described process, the pressure in the space above the hot water surface 50b in the vertical pipe 14 is in a negative pressure state lower than the atmospheric pressure. The upper part of the connection portion between the other end side of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9 is closed.

  Next, the electromagnetic valve 21 is opened, the vacuum pump 22 is operated, and the arrow 20 extends from the vertical pipe 20 above the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9. Suction in the direction 40b (FIG. 7).

  Thereby, on the one hand, the molten metal in the hot water receiving container 5 is sucked in the direction of the arrow 45 through the discharge pipe 11 (FIG. 7).

  On the other hand, the other tube 9b of the U-shaped tube 9 and one tube 9a of the U-shaped tube 9, a connection portion between the other end of the suction tube 10 and the upper side of the one tube 9a of the U-shaped tube 9, The molten metal is sucked from the hot water supply container 1 through the suction pipe 10 as shown by an arrow 41 and ascends in the direction of the arrow 44 in the other pipe 9b of the U-shaped pipe 9 (FIG. 7).

  As shown in FIG. 7, the suction pipe 10, the connection between the other end of the suction pipe 10 and the upper side of one pipe 9 a of the U-shaped pipe 9, the one pipe 9 a of the U-shaped pipe 9, the U-shaped pipe 9 is connected to the other side of the other pipe 9b, the other end of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9, and the molten metal is continuously supplied from the hot water supply container 1 to the hot water receiving container 5 through the discharge pipe 11. To do.

  At this time, in the vertical pipe 20 extending from the pipe 9b above the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9, the suction pipe 11 is sucked in the direction of the arrow 40b. The molten metal rises to a position indicated by reference numeral 51a, for example.

  On the other hand, in the vertical pipe 14 extending from the pipe 9a above the connecting portion between the other end side of the suction pipe 10 and the upper side of the one pipe 9a of the U-shaped pipe 9, it is more The liquid level is lowered, and for example, the molten metal surface is at a position indicated by reference numeral 50c.

  And as above-mentioned, the space part above the liquid level 50c in this vertical pipe 14 is still in the negative pressure state whose pressure is lower than atmospheric pressure.

  Next, in the state shown in FIG. 7, the vacuum pump 22 is stopped, the electromagnetic valve 21 is closed, and the upper part of the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9 b of the U-shaped pipe 9. Is closed (FIG. 8).

  That is, since the suction by the vacuum pump 22 is performed as in the above-described process, the pressure in the space portion above the hot water surface 51a in the vertical tube 20 is in a negative pressure state lower than the atmospheric pressure. The upper part of the connecting portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped tube 9 is closed.

  Accordingly, as shown in FIG. 7, from the hot water supply container 1 to the hot water receiving container 5, the connection between the suction pipe 10, the other end of the suction pipe 10 and the upper side of one pipe 9 a of the U-shaped pipe 9, a U-shape Hot water supply via one pipe 9 a of the pipe 9, the other pipe 9 b of the U-shaped pipe 9, a connection portion between the other end of the discharge pipe 11 and the upper side of the other pipe 9 b of the U-shaped pipe 9, and the inside of the discharge pipe 11 As shown in FIG. 8, due to the siphon phenomenon, the hot water receiving container in which the liquid level 8 of the molten metal 7 contained is lower than the liquid level 3 of the molten metal 2 contained in the hot water supply container 1 as shown in FIG. 8. 5, the molten metal flows as indicated by arrows 41, 42, 43, 44, 47.

  In the process of transferring the molten metal from the hot water supply container 1 to the hot water receiving container 5 due to the siphon phenomenon, as shown in FIG. 8, the liquid level in the vertical tube 20 is, for example, as shown in FIG. Although it may be slightly lower than the liquid level, as described above, above the connection portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9 (the vertical pipe 20). The space portion indicated by reference numeral 20a is maintained in a negative pressure state. Further, the liquid level in the vertical pipe 14 may be slightly lower than the liquid level shown in FIG. 7, for example, as indicated by reference numeral 50d. The upper side of the connection portion between the side and the upper side of one tube 9a of the U-shaped tube 9 (a space portion indicated by reference numeral 14a of the vertical tube 14) is maintained in a negative pressure state.

  In particular, the pressure (in a negative pressure state) above the connecting portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9 is greater because of the process described above. The pressure is maintained lower (smaller) than the pressure (in a negative pressure state) above the connecting portion between the other end of the tube 10 and the upper side of one tube 9a of the U-shaped tube 9.

  Therefore, the transfer of the molten metal by the siphon phenomenon from the hot water supply container 1 to the hot water receiving container 5 is performed in the molten metal 2 in which the suction port 10a of the suction pipe 10 is accommodated in the hot water supply container 1, as shown in FIG. The discharge port 11 a of the discharge pipe 11 is inserted into the molten metal 7 accommodated in the hot water receiving container 5, and the liquid level 8 of the molten metal 7 accommodated in the hot water receiving container 5 is the hot water supply. As long as it is lower than the liquid level 3 of the molten metal 2 accommodated in the container 1, it is performed stably forever.

  Therefore, for example, the hot water supply container 1 is provided in a dedicated vehicle that transports a high-temperature molten metal (for example, a molten aluminum at a temperature of about 840 ° C.) in a molten state, and accommodates the high-temperature molten metal. If the molten metal holder and the hot water receiving container 5 are arranged in the basement of a factory or the like and are a holding furnace that accommodates a high-temperature molten metal (for example, a molten aluminum having a temperature of about 840 ° C.), From the molten metal holder of the dedicated vehicle to the holding furnace of the factory, safely and gently, without contacting the high-temperature molten metal with the atmosphere, the entire amount of the molten metal in the molten metal holder of the dedicated vehicle is retained in the factory Can be transferred to.

  When it is necessary to stop the transfer of the molten metal from the hot water supply container 1 to the hot water receiving container 5 due to the siphon phenomenon described above, for example, either the electromagnetic valve 15 or the electromagnetic valve 21 is opened and the other of the suction pipe 10 is opened. The upper part of the connection between the end side and the upper side of one tube 9a of the U-shaped tube 9 is opened to atmospheric pressure, or the other end side of the discharge tube 11 and the upper side of the other tube 9b of the U-shaped tube 9 What is necessary is just to open | release above the connection part of this to atmospheric pressure state.

  In this state, in order to restart the transfer of the molten metal from the hot water supply container 1 to the hot water receiving container 5 due to the siphon phenomenon described above, the above-described steps described with reference to FIGS.

  In the apparatus for transferring molten metal according to the present invention, for example, an inert gas supply means 20 for supplying an inert gas is connected via a solenoid valve 18 to a connection path of a vacuum pump 16 that is a first suction means. Can do.

  As a result, the opening and closing control of the solenoid valves 15 and 21, the opening and closing control of the solenoid valve 18, and the control of the inert gas supply means 20 are performed, and before the above-described transfer of the molten metal of the present invention is performed, the suction pipe 10. , A connecting portion between the other end of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9, a vertical pipe 14, one pipe 9a of the U-shaped pipe 9, the other pipe 9b of the U-shaped pipe 9, discharge Air is expelled from the connection portion between the other end side of the tube 11 and the upper side of the other tube 9b of the U-shaped tube 9, the vertical tube 20, and the discharge tube 11, and these are filled with an inert gas. Then, if the above-described molten metal of the present invention is transferred, the hot molten metal can be transferred from the hot water supply container 1 to the hot water receiving container 5 without being brought into contact with the atmosphere.

  Further, the hot water supply container 1 and the hot water receiving container 5, the suction pipe 10, the connection part between the other end of the suction pipe 10 and the upper side of one pipe 9 a of the U-shaped pipe 9, one of the vertical pipe 14 and the U-shaped pipe 9. The tube 9a, the other tube 9b of the U-shaped tube 9, the connecting portion between the other end of the discharge tube 11 and the upper side of the other tube 9b of the U-shaped tube 9, the outer periphery of the vertical tube 20 and the discharge tube 11 Insulation can be installed.

  FIG. 9 illustrates another example of the molten metal transfer device 6 according to the present invention.

  A viewing window 25 is provided above the connecting portion between the other end of the suction pipe 10 and the upper side of one pipe 9 a of the U-shaped pipe 9, and the other end side of the discharge pipe 11 and the other pipe 9 b of the U-shaped pipe 9. Except for the point that the observation window 26 is provided above the connection portion with the upper side of the metal, the metal melt transfer device 6 of the present invention described with reference to FIGS. 1 to 8 and the present invention using the same. Since it is the same as the method for transferring the molten metal, the same reference numerals are assigned to the portions common to both, and the description thereof is omitted.

  In the illustrated embodiment, the observation windows 25 and 26 are formed in a cylindrical shape, and heat resistant glass is loaded in the cylinder.

  In the connection part between the other end side of the suction pipe 10 and the upper side of one pipe 9a of the U-shaped pipe 9, and the connection part between the other end side of the discharge pipe 11 and the upper side of the other pipe 9b of the U-shaped pipe 9, Although the molten metal is flowing in the horizontal direction, as described above, the space portions 14a and 20a in these connecting portions have a negative pressure lower than the atmospheric pressure. Further, the suction port 10 a of the suction pipe 10 is inserted into the melt 2 accommodated in the hot water supply container 1, and the discharge port 11 a of the discharge pipe 11 is inserted into the melt 7 accommodated in the hot water reception container 5. In addition, as long as the liquid level 8 of the molten metal 7 accommodated in the hot water receiving container 5 is lower than the liquid level 3 of the molten metal 2 accommodated in the hot water supplying container 1, it is received from the hot water supplying container 1 by the siphon phenomenon. The molten metal is stably transferred to the hot water container 5.

  And in the process of this transfer, a transfer state can be confirmed from the observation windows 25 and 26. FIG.

  The other apparatus and method for transferring molten metal of the present invention will be described with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the part which is common in the other metal molten metal transfer apparatus and method of this invention demonstrated using FIGS. 1-12, and the description is abbreviate | omitted.

  13 to 15, the molten metal transfer device of the present invention includes a suction pipe 64 in which a suction port 64 a is inserted into the molten metal 63 accommodated in the hot water supply container 61 and the other end side extends upward, The discharge port 65 a is inserted into the molten metal 63 accommodated in the hot water receiving container 62 and the other end side extends upward, the other end side of the suction pipe 64, and the other of the discharge pipe 65. And a transfer pipe 90 connecting the end side.

  A negative pressure maintaining mechanism for maintaining the inside of the transfer pipe line 90 in a predetermined negative pressure state whose pressure is lower than the atmospheric pressure is connected to the transfer pipe line 90.

  The negative pressure maintaining mechanism can be composed of an electromagnetic valve 91 that is a valve body that can be opened and closed, and a vacuum pump 92 that is a suction means. In the illustrated embodiment, a vacuum pump 92 is connected to a transfer pipe line 90 via a pipe 96, and an electromagnetic valve 91 is provided in the middle of the pipe 96.

  The molten metal transfer method of the present invention using the molten metal transfer device of the present invention shown in FIG. 13 will be described.

  The electromagnetic valve 91 is opened, the vacuum pump 92 is driven, and suction is performed in the direction of the arrow 93a. Thus, the molten metal 63 is sucked in the suction pipe 64 in the direction of arrow 93b from the hot water supply container 61 side, and the molten metal 63 is sucked in the discharge pipe 65 in the direction of arrow 93c from the hot water receiving container 62 side (FIG. 13 (a)).

  Thus, the molten metal 63 sucked in the suction pipe 64 from the hot water supply container 61 side in the direction of the arrow 93b and the molten metal 63 sucked in the discharge pipe 65 from the hot water receiving container 62 side in the direction of the arrow 93c are transferred to the transfer pipe. At the time of joining in the direction of the arrow 93d and the arrow 93e in the path 90 (FIG. 13B), the suction in the arrow 93a direction by the vacuum pump 92 is stopped and the electromagnetic valve 91 is closed.

  As a result, the upper side portion of the internal space 94 of the transfer pipe line 90 indicated by reference numeral 94a in FIG. 13B is in a negative pressure state in which the pressure is lower than the atmospheric pressure received by the liquid levels 63a and 63b. Maintained.

  In this manner, the inside of the transfer pipe line 90 is maintained in a predetermined negative pressure state whose pressure is lower than the atmospheric pressure, and the molten metal accommodated in the hot water supply container 61 from the hot water supply container 61 as shown in FIG. As shown by arrows 93b, 93f, and 93g, the molten metal is transferred using the siphon phenomenon to the hot water receiving container 62 in which the liquid surface 63b of the molten metal 63 stored is lower than the liquid surface 63a of 63.

  In the embodiment shown in FIG. 13, the cross-sectional area of the suction pipe 64 and the cross-sectional area of the discharge pipe 65 are the same.

  Therefore, when the molten metal is transferred from the hot water supply container 61 to the hot water receiving container 62 using the siphon phenomenon as indicated by arrows 93b, 93f, 93g, a suction pipe indicated by reference numeral 95 is shown. A turbulent state may occur at the connecting portion between the other end side of 64 (upper side in FIG. 13B) and the transfer pipe line 90.

  The embodiment shown in FIG. 14 prevents such a turbulent flow from occurring.

  In the embodiment shown in FIG. 14, at least the flow path cross-sectional area of the portion 64 b on the other end side (the upper side in FIG. 14) of the suction pipe 64 is larger than the flow path cross-sectional area of the discharge pipe 65.

  With such a structure, the turbulent flow described in FIGS. 13B and 13C does not occur, and as shown in FIGS. 14B and 14C, as shown in the arrows 93b, 93f, and 93g. It is advantageous because the transfer of the molten metal from the hot water supply container 61 to the hot water receiving container 62 using the siphon phenomenon is continued gently.

  In the embodiment shown in FIG. 14, at least the flow path cross-sectional area of the portion 64 b on the other end side (upper side in FIG. 14) of the suction pipe 64 is made larger than the flow path cross-sectional area of the discharge pipe 65. Even if the flow path cross-sectional area of the discharge pipe 65 including the portion 64c on the suction port 64a side of the suction pipe 64 is made larger than the flow path cross-sectional area of the discharge pipe 65, the same operation and effect are achieved. Is demonstrated.

  Other structures and functions in the embodiment shown in FIG. 14 are the same as those described with reference to FIG. 13, and thus common portions are denoted by common reference numerals and description thereof is omitted.

  In the embodiment shown in FIG. 15, the transfer pipe 90 is provided with a hot water surface height detecting means 97 for detecting the hot metal surface height of the molten metal flowing in the transfer pipe 90.

  The state of the negative pressure inside the transfer pipe line 90 maintained by the negative pressure maintaining mechanism described above according to the molten metal level height of the molten metal flowing in the transfer pipe line 90 detected by the hot water level height detecting means 97. Is to control.

  For example, the electromagnetic valve 91 is opened until the molten metal level detecting means 97 detects that the molten metal level of the molten metal flowing in the transfer pipe 90 has reached a predetermined height, and the vacuum pump 92 is opened. When the molten metal level detecting means 97 detects that the molten metal level flowing through the transfer pipe 90 has reached a predetermined level, the electromagnetic valve 91 is turned on. At the same time, the suction by the vacuum pump 92 was stopped, and the molten metal level detecting means 97 was able to detect that the molten metal level flowing in the transfer pipe 90 was lower than the predetermined level. At the time, the electromagnetic valve 91 is opened, and suction by the vacuum pump 92 is started.

  Other structures and functions in the embodiment shown in FIG. 15 are the same as those described with reference to FIGS. 13 and 14, and common portions are denoted by common reference numerals and description thereof is omitted.

  FIG. 15 illustrates an embodiment in which the molten metal surface height detecting means 97 is provided in the transfer pipe line 90 in the embodiment shown in FIG. 14, but in the embodiment shown in FIG. Even if the hot water surface height detecting means 97 is provided in the path 90, the same action and effect can be exhibited.

  As mentioned above, although preferred embodiment of this invention was described with reference to the accompanying drawing, this invention is not limited to this embodiment, In the technical range grasped | ascertained from a claim, it is various forms. It can be changed.

  For example, in the embodiment shown in FIGS. 1 to 9, the vertical height position of the connecting portion between the other end side of the discharge pipe 11 and the upper side of the other pipe 9 b of the U-shaped pipe 9 is the other end of the suction pipe 10. Although it was lower than the vertical height position of the connecting portion between the side and the upper side of one tube 9a of the U-shaped tube 9, both height positions can be made the same as shown in FIG.

  In addition, if it is in the form of the suction pipe, the U-shaped pipe, and the discharge pipe described above in the embodiments shown in FIGS. 1, 10, 11, and 13 to 15, it is particularly a pipe-shaped one. Since these need not be formed, the structure of the embodiment shown in FIGS. 1, 10, 11, and 13 to 15 is formed by punching a structure made of a refractory material such as a ceramic material. The flow path of the molten metal corresponding to the suction pipe, the U-shaped pipe, and the discharge pipe having a form can also be formed.

The conceptual sectional view of a 1st embodiment of the transfer device of the molten metal of the present invention. The conceptual control figure of the transfer apparatus of the molten metal shown in FIG. The conceptual sectional view explaining other embodiment of the transfer device of the molten metal shown in FIG. The figure explaining the initial process in an example of the transfer method of the molten metal of this invention using the transfer device of the molten metal shown in FIG. The figure explaining the next process of the process shown in FIG. 4 in an example of the transfer method of the molten metal of this invention using the molten metal transfer apparatus shown in FIG. The figure explaining the next process of the process shown in FIG. 5 in an example of the transfer method of the molten metal of this invention using the molten metal transfer apparatus shown in FIG. The figure explaining the next process of the process shown in FIG. 6 in an example of the transfer method of the molten metal of this invention using the molten metal transfer apparatus shown in FIG. FIG. 7 is a step subsequent to the step shown in FIG. 7 in an example of the method for transferring a molten metal of the present invention using the molten metal transfer device shown in FIG. 1, and the molten metal is transferred from the hot water supply container to the hot water receiving container by siphon phenomenon. The figure explaining the state currently transferred. The conceptual sectional drawing of 2nd Embodiment of the transfer apparatus of the molten metal of this invention. The conceptual sectional drawing of 3rd Embodiment of the transfer apparatus of the molten metal of this invention. The conceptual sectional drawing explaining an example of the transfer method of the molten metal of this invention. FIG. 5 is a conceptual cross-sectional view for explaining a case where transfer of a molten metal becomes difficult due to inadequate control of the negative pressure state of the upper part of the suction pipe and the discharge pipe. FIG. 2 is a view for explaining another apparatus and method for transferring molten metal according to the present invention, in which (a) is a conceptual cross-sectional view illustrating a schematic configuration before the start of a transfer operation of the molten metal, and (b) is a transfer of the molten metal. FIG. 14C is a conceptual cross-sectional view for explaining the state of being carried out, and FIG. 13C is a view for explaining a state of a connection portion between the upper side of the suction pipe and the transfer pipe line in FIG. FIG. 13 illustrates another example of the embodiment illustrated in FIG. 13, wherein (a) is a conceptual cross-sectional view illustrating a schematic configuration before the start of the transfer operation of the molten metal, and (b) is a view of the molten metal being transferred. FIG. 15C is a conceptual cross-sectional view for explaining the state of the pipe, and FIG. 14C is a view for explaining the state of the connection portion between the upper side of the suction pipe and the transfer pipe in FIG. FIG. 14 illustrates another example of the embodiment illustrated in FIG. 14, where (a) is a conceptual cross-sectional view illustrating a schematic configuration before the start of the transfer operation of the molten metal, and (b) is a view of the molten metal being transferred. FIG. 16C is a conceptual cross-sectional view for explaining a state of being connected, and FIG. 15C is a view for explaining a state of a connection portion between the upper side of the suction pipe and the transfer pipe line in FIG. FIG. 10 is a conceptual cross-sectional view illustrating a conventional method for transferring using a siphon phenomenon.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water supply container 2, 7 Metal molten metal 5 Hot water receiving container 6 Metal molten metal transfer device 9 U-shaped tube 9a One tube of U-shaped tube 9b Other tube of U-shaped tube 9c Bottom of U-shaped tube 10 Suction tube 10a Suction port DESCRIPTION OF SYMBOLS 11 Discharge pipe 11a Discharge port 12 Horizontal pipe 14 Vertical pipe 14a Space part (negative pressure part)
20 Longitudinal tube 20a Shiroro (negative pressure part)
15, 18, 21 Solenoid valve 16, 22 Vacuum pump 20 Inert gas supply device 61 Hot water supply container 62 Hot water receiving container 63 Molten metal (metal melt)
63a Liquid level 63b Liquid level 64 Suction tube 64a Suction port 65 Discharge tube 65a Discharge port 66 U-shaped tube 66a One tube of U-shaped tube 66b The other tube of U-shaped tube

Claims (7)

A transfer device for transferring a molten metal from a hot water supply container using a siphon phenomenon where the liquid level of the molten metal stored in the hot water container is lower than the liquid level of the molten metal,
A suction pipe in which a suction port is inserted into the molten metal contained in the hot water supply container and the other end side extends upward;
A discharge pipe in which a discharge port is inserted in the molten metal contained in the hot water receiving container and the other end side extends upward;
A U-shaped pipe connected to the other end of the suction pipe at the upper side of one pipe, and connected to the other end of the discharge pipe at the upper side of the other pipe;
A first suction means connected via an opening / closing means above a connecting portion between the other end side of the suction pipe and the upper side of one of the U-shaped pipes;
A molten metal transfer device comprising: second suction means connected via an opening / closing means above a connecting portion between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe. A transfer device for transferring a molten metal from a hot water supply container using a siphon phenomenon where the liquid level of the molten metal stored in the hot water container is lower than the liquid level of the molten metal,
A suction pipe in which a suction port is inserted into the molten metal contained in the hot water supply container and the other end side extends upward;
A discharge pipe in which a discharge port is inserted in the molten metal contained in the hot water receiving container and the other end side extends upward;
A transfer line connecting the other end side of the suction pipe and the other end side of the discharge pipe;
A metal melt transfer device characterized in that a negative pressure maintaining mechanism for maintaining the inside of the transfer pipe in a predetermined negative pressure state lower than atmospheric pressure is connected to the transfer pipe.   The molten metal transfer device according to claim 2, wherein at least the flow path cross-sectional area on the other end side of the suction pipe is larger than the flow path cross-sectional area of the discharge pipe.   The transfer pipe is provided with a hot water surface height detecting means for detecting a hot water surface height of the molten metal flowing in the transfer pipe, and the transfer pipe detected by the hot water surface height detecting means. 4. The metal according to claim 2, wherein a state of negative pressure inside the transfer pipe maintained by the negative pressure maintaining mechanism is controlled according to a molten metal surface height of the molten metal flowing inside. Molten metal transfer device. In the method of transferring the molten metal from the hot water supply container using the siphon phenomenon in which the liquid level of the molten metal stored in the hot water container is lower than the liquid level of the molten metal,
A suction port is inserted into the molten metal accommodated in the hot water supply container and the other end side extends upward, and a discharge port is inserted into the molten metal accommodated in the hot water receiving container. A discharge pipe extending in the upward direction on the other end side, and a U-shaped pipe connected to the other end side of the suction pipe on the upper side of one pipe and connected to the other end side of the discharge pipe on the upper side of the other pipe Using the metal melt transfer device provided,
An upper portion of a connection portion between the other end side of the suction pipe and an upper side of one of the U-shaped tubes, and an upper portion of a connection portion between the other end side of the discharge pipe and the upper side of the other U-tube. Maintaining a negative pressure lower than the pressure received by the molten metal contained in the hot water supply container and the hot water receiving container, respectively, from the hot water supply container via the suction pipe, U-shaped pipe and discharge pipe A method of transferring molten metal using the hesiphon phenomenon,
The negative pressure at the upper part of the connecting portion between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe is connected to the other end side of the suction pipe and the upper side of one of the U-shaped pipes. Keep the pressure lower than the negative pressure at the top of the part,
A method for transferring a molten metal, comprising transferring a molten metal from a hot water supply container to a hot water receiving container through a suction pipe, a U-shaped pipe, and a discharge pipe using a siphon phenomenon. Using the molten metal transfer device according to claim 1,
With the upper end of the connecting portion between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe closed, the first suction means is operated to suck the molten metal in the hot water supply container. Exists at least beyond the bottom of the U-tube and below the other U-tube, and in this state, the suction by the first suction means is stopped, Close the upper part of the connection between the other end and the upper side of one of the U-shaped tubes in a negative pressure state,
Subsequently, the second suction means is operated to suck the hot water in the hot water receiving container through the discharge pipe, and the other pipe of the U-shaped pipe, one pipe of the U-shaped pipe, and the suction pipe The molten metal is sucked from the hot water supply container through the connection portion between the other end side and the upper side of one of the U-shaped tubes and the suction tube, and the other end of the suction tube, the suction tube and one of the U-shaped tubes The hot water supply through a connection part with the upper side, one pipe of the U-shaped pipe, the other pipe of the U-shaped pipe, a connection part between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe, and the inside of the discharge pipe The molten metal is continuously made from the container to the hot water receiving container,
Here, the suction by the second suction means is stopped, and the upper part of the connection part between the other end side of the discharge pipe and the upper side of the other pipe of the U-shaped pipe is closed in a negative pressure state,
Maintaining a negative pressure above the connecting portion between the other end of the suction pipe and the upper side of one of the U-shaped pipes, and the other end side of the discharge pipe and the upper side of the other U-shaped pipe Maintain a negative pressure above the connection of
A method for transferring a molten metal, wherein the molten metal is transferred from the hot water supply container by a siphon phenomenon to the hot water receiving container. In the method of transferring the molten metal from the hot water supply container using the siphon phenomenon in which the liquid level of the molten metal stored in the hot water container is lower than the liquid level of the molten metal,
Using the molten metal transfer device according to any one of claims 2 to 4,
Maintaining the inside of the transfer pipe in a predetermined negative pressure lower than atmospheric pressure,
A method for transferring a molten metal, wherein the molten metal is transferred from the hot water supply container by a siphon phenomenon to the hot water receiving container.

Images