JPH11320077A - Pump for molten metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely execute the transport and the control of molten metal by interposing a valve element so as to be freely turned between a valve retainer including a molten metal storing chamber inside and a valve guard which is combined by mutually drawing close to the valve retainer. SOLUTION: A pump 1 for molten metal is used by interposing the valve element 11 so as to be freely turned between the valve retainer 9 including the molten metal storing chamber 13 inside and the valve guard 10 fitted in an upper supporting body 9 and dipping into the molten metal 2 in a holding furnace, etc. The gas exhaust and the pressure reduction are executed by working a gas exhausting means 26 through a route of the molten metal storing chamber 13, a gas venting tube in the valve element 11 and a gas exhaust tube 24a in the valve guard 10. The valve element is turned by the angle of 120 deg., and the molten metal 2 is sucked into the molten metal storing chamber 13 through the route of a fluid tube, etc., in the valve retainer 3 and the valve guard 11. Further, valve element is turned by the angle of 120 deg., and the molten metal 2 is spouted and transported out to the outer part by working a gas supply-means 25 and supplying the gas into the molten metal storing chamber 13. The valve element 11 is intermediately turned every angle of 120 deg., and the suction and the spouting of the molten metal, are controlled. Even the molten metal 2 at 1000 deg.C is fully automatically transported at extremely good efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal melt pump used for transferring a high-temperature molten metal such as an aluminum molten metal from a blast furnace or a holding furnace to a desired position such as a mold.

[0002]

2. Description of the Related Art Conventionally, for transferring molten metal, a molten metal is taken from a blast furnace into a ladle, and the ladle is tilted and poured into a casting mold, or a plug at a molten metal outlet of the furnace is removed and the molten metal is dropped to drop the molten metal. (Japanese Patent Publication No. 2-8237). Since such a transfer method involves many dangers and mainly involves manual transfer,
There was a problem that workers were exposed to severe working conditions. Further, there is also a problem that the molten metal comes into contact with the atmosphere and is oxidized.

[0003]

In order to solve the above-mentioned conventional problems, the inventor of the present application has provided a vertical U-shaped pipe between a suction pipe and a discharge pipe for molten metal and a closed storage tank, respectively. An inverted U-shaped pipe is connected between the transfer destination and a metal molten metal pump (Japanese Patent Laid-Open No. 5-84563) to which an inert gas supply / discharge means is connected, and a sealed storage tank to which a molten metal suction pipe is connected. A metal melt pump in which inert gas supply / discharge means is connected to the closed storage tank and the inverted U-shaped pipe, respectively (Japanese Patent Laid-Open No. 5-84)
564).

[0004] With these methods, the molten metal is transferred under a fully automated system without human power, and the possibility that the molten metal comes into contact with the atmosphere during the transfer is eliminated. Can be solved.

However, in these techniques proposed by the present inventors, it is necessary to control a plurality of supply / discharge valves to transfer the molten metal, and it is necessary to further improve the point that the handling is relatively difficult. Was.

[0006] In order to solve such a conventional problem, the inventor of the present application firstly stores the molten metal in the molten metal storage chamber of the molten metal pump, stops the storage, and removes the molten metal from the molten metal storage chamber. Discharge, control of operation such as stop of discharge, switching, the valve body and the valve receiver, or the fixed part and the rotating body, the opening for communicating the fluid passage and the gas passage that pass through each of them is provided. Japanese Patent Application No. 10-47089 proposes a metal melt pump that switches and controls by using a valve that is configured to be pressed and slid between inclined surfaces that are provided (Japanese Patent Application No. 10-47089).

[0007] This proposal of the inventor of the present application has been able to solve the above-mentioned conventional problems. This metal melt pump accommodates a metal melt by its own weight in a molten metal storage chamber at atmospheric pressure. Therefore, there is room for improvement in the efficiency of transferring the molten metal.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a metal melt pump capable of accurately and easily and surely controlling the transfer of the metal melt, the work efficiency of which is further improved. Is to do.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a molten metal storage chamber of a metal molten metal pump is depressurized and the molten metal is sucked into the molten metal storage chamber from the outside while the molten metal storage chamber is pressurized and sucked. A metal melt pump for discharging the molten metal to the outside, a valve receiving body containing a molten metal storage chamber, a valve presser body combined with the valve receiving body so as to be attracted to each other, and The object has been achieved by employing a metal melt pump that is movable between a valve receiving body and a valve holding body and that is constituted by a valve body that is rotatably clamped.

In the above, the valve receiver includes the molten metal storage chamber, a flow pipe for sucking the molten metal from the outside into the molten metal storage chamber, and a flow pipe for discharging the molten metal from the molten metal storage chamber to the outside. The valve holding body has a supply pipe and an exhaust pipe connected to external supply and exhaust means, and a flow pipe for discharging the molten metal to the outside,
The valve body has a configuration having a ventilation pipe for gas flow and a flow pipe for metal melt flow. By adopting such a configuration, it is possible to control the suction of the molten metal from the outside into the molten metal storage chamber and the discharge of the molten metal from the molten metal storage chamber to the outside.

That is, in the above configuration, each of the flow pipes in the valve body and the flow pipes for sucking the molten metal from the outside into the molten metal storage chamber in the valve receiver is constituted by at least two flow pipes. By rotating the valve body while being sandwiched between the valve receiver and the valve holding body, the two flow tubes for sucking the molten metal from the outside into the molten metal storage chamber in the valve receiver are connected to each other. Is communicated via one of the two flow pipes in the valve body, or the communication is interrupted by the valve body, and an air supply pipe or an exhaust pipe in the valve holding body and the molten metal storage chamber. Through a vent pipe in the valve body, or cut off the communication by the valve body, and further, a flow pipe for discharging the molten metal from the molten metal storage chamber in the valve receiver to the outside and a flow pipe in the valve presser body. And the two in the valve body Of the metal pipe through the other flow pipe or the valve body interrupts the communication, whereby the metal melt is sucked into the molten metal storage chamber from the outside and the molten metal is discharged from the molten metal storage chamber to the outside. The control of the discharge of the molten metal into the metal is performed.

[0012] Thus, only by rotating the valve element sandwiched between the valve receiving element and the valve element, the molten metal storage chamber → the ventilation pipe in the valve element → the valve element connected to the external exhaust means. Exhaust pipe from the molten metal storage chamber through the exhaust pipe (decompression inside the molten metal storage chamber), one of the two fluid pipes in the valve receiver for inhaling molten metal from the outside into the molten metal storage chamber Flow tube → One of the two flow tubes in the valve body → The other flow tube of the two flow tubes in the valve receiver for inhaling molten metal from the outside into the molten metal storage chamber → Molten metal Inhalation of the molten metal from outside into the depressurized molten metal storage chamber through the route of the storage chamber, air supply pipe in the valve holding body connected to the external air supply means → ventilation pipe in the valve body → molten metal Supply air to the molten metal storage chamber (pressurizing the molten metal storage chamber) through the route called the storage chamber, Pressurized molten metal storage via the route of chamber → flow pipe for discharging molten metal from the molten metal storage chamber to the outside → other flow pipe of the two flow pipes in the valve body → flow pipe in the valve presser body The discharge of the molten metal from the chamber to the outside can be controlled extremely efficiently, accurately, and safely.

[0013] In the above structure, the lower surface of the valve holding member abutting on the upper surface of the valve element and the upper surface of the valve receiving member abutting on the lower surface of the valve element are each formed with an inclined surface, and the valve element is formed as an inclined surface. The lower surface of the valve presser and the inclined surface corresponding to the inclined surface of the upper surface of the valve receiver are formed on the upper surface side and the lower surface side, and the mutual flow between the flow pipe in the valve body and the flow pipe in the valve receiver body is performed. The communication and the mutual communication between the flow pipe in the valve body and the flow pipe in the valve presser body are performed by aligning the openings of the respective flow pipes facing the respective inclined surfaces by rotating the valve body. It can be configured.

According to this structure, the valve holder and the valve presser which are combined so as to be attracted to each other are movably movable (that is, movably in the direction of the valve receiver or the valve presser). Movably in the direction of the body or movably in both directions) and rotatably sandwiched, the upper and lower slopes of the valve body are fixed to the lower slope of the valve retainer and the valve receiver. Sliding on the lower inclined surface of the valve presser body and the upper inclined surface of the valve receiver while being pressed against the upper inclined surface, respectively, to align the openings of the respective flow tubes facing these inclined surfaces. become. As described above, the valve holding body, the valve body, and the valve receiving body are pressed and slid with each other on the inclined surfaces, and the openings of the respective flow tubes communicate with each other on these inclined surfaces.
The molten metal flowing in the flow pipe does not enter between the valve body and the valve presser body and between the valve body and the valve receiver. As a result, the upper and lower inclined surfaces of the valve body and the inclined surface of the valve presser or the valve receiver slide with the molten metal that has entered between them, and are slid by impurities contained in the molten metal. There is no danger that the contact surfaces (inclined surfaces) will each be damaged and the corrosion resistance will be reduced. Further, even if these contact surfaces (inclined surfaces) are damaged, the valve holding body and the valve receiving body are combined so as to attract each other or to hold each other. Since the valve body is sandwiched between the valve holding body and the valve receiving body that are attracted to each other (or pressed against each other) in this manner, the state that the inclined surfaces are always pressed against each other and slidable is maintained. This also prevents the molten metal flowing in the flow pipe from entering between the valve body and the valve presser body and between the valve body and the valve receiver.

[0015]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The pump 1 for molten metal of the present invention comprises a valve receiver 3 having a molten metal storage chamber 13 therein, a valve presser 10 fitted in an upper support 9, a valve holder 3 and a valve. The valve body 11 is sandwiched between the holding body 10 and the valve body 11.
The motor 5 is mounted on the upper flange 4a of the valve receiver 3 via the support 4b, the flange 4c, the support 4d, and the machine base 8, and the motor 5 allows the motor 5 to rotate freely into the upper support 9 and the valve retainer 10. The drive shaft 6, which is fitted and whose tip is fixed to the upper part of the valve body 11, is rotated in the direction of the arrow 18 (FIG. 1). A spring 7 is fitted between the flange 4 c of the drive shaft 6 and the upper surface of the upper support 9, and the upper support 9, the valve presser 10, and the valve 11 are always operated by the action of the spring 7.
Are pressed in the direction of arrow 12. Thus, the valve receiving body 3 and the valve holding body 10 are combined so as to be attracted to each other, and the valve body 11 is located between the valve receiving body 3 and the valve holding body 10 thus attracted to each other. It will be pinched. In addition, as described above, in correspondence with the valve receiving body 3 and the valve holding body 10 being combined so as to be attracted to each other, the valve body 11 is attached to the tip thereof.
The drive shaft 6 is fixed by a conventionally known structure so that the valve body 11 can move in the direction of the valve receiver 3 or the direction of the valve presser body 10, or in both directions.
It is attached to the machine base 8 so as to be movable downward, upward, or both up and down.

The pump 1 for molten metal of the present invention is used by being immersed in a molten metal 2 sucked into a furnace for holding molten metal or the like (FIG. 1).

The valve receiving body 3 has an inclined surface 17 for receiving the valve body 11 on an upper surface thereof, and an opening 14b for sucking the molten metal 2 at a lower end side.
, A flow tube 15 communicating from the opening 15a of the inclined surface 17 to the molten metal storage chamber 13, and a flow tube 16 communicating from the molten metal storage chamber 13 to the opening 16a of the inclined surface 17 (FIGS. 1 and 2). (A) (b)). A central portion of the upper inclined surface 17 of the valve receiver 3 is an upper opening 13a of the molten metal storage chamber 13 (FIG. 2B). The flow tubes 14 and 15 in the above are flow tubes for sucking the molten metal from the outside into the molten metal storage chamber 13, and the flow tube 16 is a flow tube for discharging the molten metal from the molten metal storage room 13 to the outside. Valve retainer 1
0 has an inclined surface 32 for pressing down the valve element 11 on the lower surface thereof, an opening 19 for inserting the drive shaft 6 in the center, and an upper support 9 for gas supply means (air supply means) 25 therein. An air supply pipe 23a connected via an air supply pipe 23 in the inside,
Exhaust pipe 24 and switch 26 in upper support 9
The exhaust pipe 24a connected to the gas exhaust means (exhaust means) 27 through the air, and the external discharge of the molten metal connected to the molten metal discharge pipe 21 to the outside via the flow pipe 20 in the upper support 9 And a flow tube 20a. The air supply pipe 23a, the exhaust pipe 24a, and the flow pipe 20a communicate with openings 23b, 24b, 20b facing the inclined surface 32, respectively (FIGS. 1, 4 (a), (b), (c), (d)). .

The valve body 11 has an upper surface formed on an inclined surface 28a corresponding to the inclined surface 32 of the valve presser body 10, and a lower surface formed on an inclined surface 28b corresponding to the inclined surface 17 of the valve receiver 3.
Further, when the center lower surface 28c is combined with the valve receiver 3, the upper opening 13a of the molten metal storage chamber 13 in the valve receiver 3 is opened.
, And are configured to face directly. In addition, valve element 1
Inside 1, there are provided a gas flow pipe 29, and a metal melt flow pipe 30, 31 communicating with the upper inclined surface 28 a through the opening 29 a, the central lower surface 28 c through the opening 29 b, respectively. The flow tube 31 works when the molten metal is sucked into the molten metal storage chamber 13 in the valve receiver 3 from the outside, and is provided in a substantially horizontal direction (FIG. 3 (c)). It faces the openings 30b and 30c provided on the surface 28a. The positions of the openings 30b and 30c are such that the molten metal flowing through the flow pipe 14 in the valve receiver 3 passes through the flow pipe 31 and flows through the flow pipe 15 in the valve receiver 3 and the molten metal storage chamber. The flow pipe 1 provided on the inclined surface 17 of the valve receiver 3 so as to be able to flow into
Holes 4 and 15 are formed corresponding to the positions of the openings 14a and 15a. On the other hand, the flow tube 30 functions when the molten metal sucked into the molten metal storage chamber 13 in the valve receiver 3 is discharged to the outside, and is provided in a substantially vertical direction (FIG. 3 (b)). )), The flow tube 16 in the valve receiver 3 and the valve presser 1
It plays a role of communicating with the flow pipe 20a in the inner space 0.

Hereinafter, using the metal melt pump 1 of the present invention, the metal melt 2 existing outside the metal melt pump 1, that is, housed in the holding furnace, is discharged from the discharge pipe 21 through the discharge pipe 21. A case of discharging and transferring the molten metal to the outside of the pump 1 as shown by an arrow 22 will be described.

In order to simplify this description, the positional relationship among the valve presser 10, the valve 11, and the valve receiver 3 will be described with reference to FIG. In FIG. 5, the top row indicates the bottom surface (lower inclined surface 32) of the valve presser 10, and the second row from the top indicates the plane of the valve body 11 (upper inclined surface 28 a). The third row from the bottom represents the bottom surface (lower inclined surface 28b, central lower surface 28c) of valve body 11, and the bottom row represents the plane of valve receiver 3 (upper inclined surface 17). And FIG. 5 (a),
Each column in (b) and (c) represents the positional relationship of the respective surfaces at the same time. In the pump of the present invention, only the valve body 11 rotates, and the valve presser body 1 is rotated.
0, the valve receivers 3 are attracted to each other, but do not move in the horizontal direction such as rotational movement.
The middle, top row and bottom row are shown in FIG.
At each time point of (b) and (c), a fixed position is always maintained.

First, the valve element 11 is set at a position indicated by a vertical line in FIG. That is, the lower end opening 24b of the exhaust pipe 24a of the valve holding body 10 and the ventilation pipe 29 in the valve body 11
Of the exhaust pipe 24a and the ventilation pipe 2
9 is in communication. So switch 2
6 is operated to operate the exhaust means 27 (for example, a pressure reducing motor), the lower end opening 29 of the ventilation pipe 29 in the valve body 11 is opened.
b is an upper opening 13 a of the molten metal storage chamber 13 in the valve receiver 3.
, While the flow tube 1 passing through the valve receiver 3
Openings 15a, 16a whose upper surfaces 5 and 16 face the upper inclined surface 17
Is closed by the lower inclined surface 28b of the valve body 11, which is in contact (pressed) with the inclined surface 17 from above, so that the gas in the molten metal storage chamber 13 is sucked and the molten metal storage chamber 1
Exhaust from the molten metal storage chamber 13 (decompression in the molten metal storage chamber 13) through a route of 3 → the ventilation pipe 29 in the valve body 11 → the exhaust pipe 24a in the valve holding body 10 connected to the external exhaust means 27. , For example, to a vacuum state).

Next, the switch 26 is switched to stop the operation of the exhaust means 27, and the valve body 11 is rotated 120 degrees as indicated by an arrow 33 (FIG. 5A), and FIG.
In the state shown in the column. Here, an opening 14 a facing the inclined surface 17 of the flow tube 14 and the flow tube 15 in the valve receiver 3,
Since the opening 15c and the opening 30c facing the inclined surface 28b of the flow pipe 31 in the valve body 11 are opposed to each other, the molten metal storage chamber 13 in the valve receiver 3 is connected to the flow pipe 15 in the valve receiver 3. ,
Through the flow pipe 31 in the valve body 11 and the flow pipe 14 in the valve receiver 3, it is communicated with the molten metal 2 in the holding furnace.
Here, as described above, the molten metal storage chamber 13 is in a reduced pressure state (for example, a vacuum state), and the upper end opening 29 a of the ventilation pipe 29 in the valve body 11 communicating with the upper opening 13 a of the molten metal storage chamber 13. Is closed by the lower inclined surface 32 of the valve presser body 10 which is in contact with (presses against) the upper inclined surface 28a of the valve body 11, and the upper end opening 16 of the flow pipe 16 in the valve receiver 3 is closed.
Since a is closed by the lower inclined surface 28b of the valve body 11 which is in contact with (pressed against) the inclined surface 17 of the valve receiver 3, the flow pipe 14 in the valve receiver 3 → the valve body 11 Flow tube 3 inside
1 → the flow pipe 15 in the valve receiver 3 → the molten metal storage chamber 13;
Inhalation of the molten metal 2 from the outside is performed as shown by arrows 36 (FIG. 1), arrows 37 (FIG. 5 (b)), arrows 38 and 39 (FIG. 2 (a)), and the molten metal storage chamber 13 is shown. The molten metal 2a is sucked into the inside.

Next, the valve body 11 is moved to 120
5C (FIG. 5 (b)) to bring it into the state shown in the column in FIG. 5 (c). In this state, the air supply pipe 23 of the valve
The lower end opening 23b of the valve body 11 and the upper end opening 29a of the ventilation pipe 29 in the valve body 11 face each other, the air supply pipe 23a communicates with the ventilation pipe 29, and the inclined surface of the flow pipe 16 in the valve receiver 3 1
7 is provided on the lower inclined surface 28 of the valve body 11.
b, the lower end openings 30 of the flow tubes 30 and 31
b, while the upper end opening 30a of the flow tube 30 formed in the upper inclined surface 28a of the valve body 11 is
Opposing the lower end opening 20b of the flow tube 20a drilled in the lower inclined surface 32. That is, the molten metal storage chamber 13 in the valve receiver 3 is provided with the flow pipe 16 in the valve receiver 3 and the valve element 1.
1, the fluid pipe 20 a in the valve holding body 10, the fluid pipe 20 in the upper support 9, and the discharge pipe 21, are communicated with the outside of the metal melt pump 1.

Then, the gas supply means 25 is operated,
An air supply pipe 23 in the upper support 9 → an air supply pipe 23a in the valve holding body 10 → a vent pipe 29 in the valve body 11 → the molten metal storage chamber 13;
As indicated by arrows 40 and 41, air is supplied to the molten metal storage chamber 13 (pressurization in the molten metal storage chamber 13), and the sucked molten metal 2a is pushed down as indicated by arrows 42 (FIG. 1).

Here, the opening 15a facing the inclined surface 17 of the flow tube 15 in the valve receiver 3 is provided with a lower inclined surface 28b of the valve body 11 which is in contact (presses) with the inclined surface 17 from above.
The metal melt 2c pushed down as described above is blocked by the flow pipe 16, the flow pipe 30, the flow pipe 2
0a, arrows 43, 44, 4 in the flow pipe 20 and the discharge pipe 21.
5, 46 and 47 (FIGS. 1, 2 (a) and 3 (b)), and discharges to the outside of the pump 1 as shown by an arrow 22,
Be transported.

At this time, the flow pipe 31 in the valve body 11
Although the flow pipe 30 and the opening 30b for discharging the molten metal are made common, the other opening 30c of the flow pipe 31 is formed in the lower inclined surface 28b of the valve body 11, This is closed by the upper inclined surface 17 of the valve receiver 3 which is in contact with (presses against) the lower inclined surface 28b of the valve element 11 from below. 3
1 plays virtually no role.

When the discharge operation is completed as described above, the valve body 11 is rotated 120 degrees as indicated by an arrow 35 (FIG. 5).
(C)), and return to the state shown in FIG. Hereinafter, FIG.
5A to 5C, the molten metal 2 in the holding furnace is sucked into the molten metal storage chamber 13 and is sucked from the molten metal storage chamber 13 to a desired external position. Discharge and transfer of the molten metal 2a can be performed accurately and extremely efficiently. By intermittently rotating, stopping, and rotating the valve body 11 by 120 degrees,
The above-described suction and discharge operations are controlled. The intermittent rotation, stop, and rotation of the valve element 11 can be performed by controlling the operation of the motor 5 using a termer or a known limit switch.

In the above, the exhaust capacity of the exhaust means, the supply capacity of the gas supply means, and its exhaust and air supply speeds are adjusted.
Further, by adjusting the rotation speed of the drive shaft 6 by the motor 5, the amount of the molten metal to be sucked and discharged and the interval between the suction and discharge can be appropriately controlled.

Also, by rotating the valve body 11 only, the flow pipe in the valve receiving body 3 that does not move rotationally communicates with the flow pipe in the valve holding body 10 that does not move rotationally, shuts off, and receives no rotation. It is possible to control the communication between the flow pipe in the body 3 and the flow pipe in the valve body 11, the cutoff, and the communication and the cutoff between the exhaust pipe and the air supply pipe in the valve holding body 10 which does not rotate and the ventilation pipe in the valve body 11. As long as the number of the flow pipes can be increased, the number of the flow pipes in the valve receiver 3, the valve holding body 10, and the valve body 11 can be increased, and the molten metal can be placed at a plurality of positions. It is also possible to discharge and transfer a fixed amount at a time.

In the above, if an inert gas such as nitrogen gas or argon gas is used as the gas to be supplied to the molten metal storage chamber 13, the molten metal is shut off from the atmosphere during the transfer of the molten metal by the pump 1, and the molten metal is oxidized. Can be prevented. Also,
In this case, although not shown, the exhaust means and the gas supply means may be formed as a series, and the inert gas may be used repeatedly to reduce the cost.

In this embodiment, as shown in FIGS. 1 and 2, the lower side of the flow pipe 15 and the lower side of the flow pipe 16 connected to the molten metal storage chamber Although the connection is made from a position lower than the bottom surface, even when the molten metal storage chamber 13 is pressurized to discharge the molten metal, the molten metal remains under the flow tubes 15 and 16,
The remaining molten metal, in particular, the remaining molten metal below the flow tube 16 serves as a stopper, so as to minimize the chance of the molten metal coming into contact with the atmosphere. It is configured as

Since the molten metal pump 1 of the present invention is used by being sunk in the molten metal 2 of the holding furnace, the molten metal storage chamber 13 is used.
At the end of the reduced pressure suction operation into the inside, the molten metal has reached the upper end opening 14 a of the flow tube 14, and when the pressurized discharge from the molten metal storage chamber 13 is finished, the upper end opening 15 a of the flow tube 15 , The upper end opening 16a of the flow tube 16, the flow tube 2
The molten metal has reached the lower end opening 20b of the valve receiver 3a.
7, are drilled in the lower inclined surface 32 of the valve holding body 10, and these inclined surfaces are respectively connected to the lower inclined surface 28b of the valve body 11 and the upper inclined surface 28a of the valve body 11,
The valve body 11 is brought into contact (pressure contact) with the vertically inclined surfaces 28a,
8b is rotated while slidingly contacting the upper inclined surface 17 of the valve receiver 3 and the lower inclined surface 32 of the valve retainer 10, and thus reaches the openings 14a, 15a, 16a, 20b and the like as described above. The molten metal is formed on the upper and lower inclined surfaces 28a, 28 of the valve body 11.
b, the inclined surface 17 of the valve receiver 3 and the inclined surface 3 of the valve presser 10
There is no danger that the respective contact surfaces (inclined surfaces) will be damaged by impurities that intrude into the molten metal 2 and exist in the molten metal, and the corrosion resistance will not be reduced.

For this purpose, the inclined surfaces 28a, 28b, 28a, 28b of the valve body 11, the valve receiver 3, and the valve holding body 10 are set so that the angle indicated by θ in FIG. 17, 3
It is preferable to configure each of the two. This angle θ is 3
If the angle is smaller than 0 degrees or larger than 60 degrees, the molten metal reaching the opening 14a or the like may enter between the contact surfaces (inclined surfaces).

If the angle θ falls within the range of 30 degrees to 60 degrees, even if the molten metal reaches the opening 14a or the like and is in contact with the inclined surface 28a or the like, the inclined surfaces are pressed against each other and slide. Due to the movement, the molten metal is in contact with the inclined surface
There is no intrusion between. Metal melt pump 1 of the present invention
Since the pump 1 is used by being immersed in the molten metal 2 of the holding furnace, the pump 1 is always warmed, and even if the transfer operation by the pump 1 is stopped, the molten metal storage tank 13
There is no danger that the molten metal 2a or the like sucked into the inside will harden due to a decrease in temperature.

The combination of the valve body 11, the valve receiver 3 and the valve holding body 10 according to the present invention is such that the contact surfaces where the openings of the flow pipes passing therethrough are provided are respectively as described above. The configuration is not limited to the configuration of this embodiment since it is only necessary to abut on inclined surfaces having a predetermined angle such as θ and press (press against) by the action of the spring 7. For example, the upper and lower surfaces of the valve body 11 may be convexly curved surfaces, and the surfaces of the valve receiver 3 and the valve presser body 10 that are in contact therewith may be concavely curved surfaces. That is, the valve body 11, the valve receiver 3, and the valve presser body 10 are configured to be slidably pressed on inclined surfaces or curved surfaces each having an opening for a flow pipe passing therethrough. Any of the valves can be used as a valve for switching (controlling) the stop of the suction of the molten metal to the pump for the molten metal, the start of the discharge, and the stop of the discharge in the present invention.

The spring 7 employed in the above embodiment
By pressing the valve holding body 10 in the direction of the valve receiver 3, the upper and lower inclined surfaces 28a, 28b of the valve body 11 and the valve holding body 1 are pressed.
Since the lower inclined surface 32 and the upper inclined surface 17 of the valve receiver 3 are pressed against each other, any elastic member that plays a similar role can be employed. In addition, not only one of the valve holding member 10 and the valve receiving member 3 is pressed against the other fixed member, but also one of the valve holding member 10 and the valve receiving member 3 is attracted toward the other fixed member. May be employed. Note that, as described above, it is only necessary to be able to press and pull, so a known cylinder mechanism can be employed.

Incidentally, the valve body 11, the valve receiver 3 and the valve holding body 10 in the above embodiment can be formed of a fire-resistant ceramic or the like. For example, Si3 N4 (trisilicon tetranitride)
Such as silicon nitride, boron nitride, boron nitride (Bo)
Nitride ceramics such as ron nitride (BN) and polycrystalline boron nitride produced by a vapor phase growth method can be used.

[0039]

According to the present invention, it is possible to transfer a molten metal having a high temperature such as 1000 ° C. to a desired place simply, fully automatically, and very efficiently without using human power. it can. In addition, the amount and interval of the transfer of the molten metal can be easily and accurately controlled. Furthermore,
The pump makes it possible to transfer the molten metal not only in one direction but also in many directions.

The valve used for switching (controlling) the start of the suction of the molten metal into the pump, the stop of the suction, the start of the discharge, and the stop of the discharge in the pump for molten metal is controlled by a valve body, a valve receiver and Since the valve presser body and the inclined surfaces having openings for communicating the flow pipes passing through each of the valve pressers are slidably pressed against each other,
The molten metal flowing in the flow tube does not enter the gap between the valve body and the valve receiver or the valve presser, and does not damage these contact surfaces (sliding surfaces).

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2A is a side view in which a part of a valve receiver is omitted, and FIG. 2B is a plan view showing an upper inclined surface of the valve receiver.

FIG. 3A is a plan view illustrating an upper inclined surface of a valve body.
3B is a sectional view taken along line AA in FIG. 3A, FIG. 3C is a sectional view taken along line BB in FIG. 3A, and FIG. Bottom view.

4A is a bottom view illustrating a lower inclined surface of a valve presser body, FIG. 4B is a cross-sectional view taken along line CC of FIG. 4A, and FIG.
FIG. 4A is a sectional view taken along line DD of FIG. 4A, and FIG.
FIG. 3A is a sectional view taken along line EE of FIG.

5A and 5B are diagrams illustrating a contact state of a valve receiver, a valve body, and a valve holding body on a contact surface (inclined surface), and FIG.
FIG. 5B is a view showing a state in which an air supply pipe in the valve presser body and a ventilation pipe in the valve body communicate with each other; FIG. 5B is a state in which the air supply pipe is rotated 120 degrees counterclockwise from FIG. ) Is FIG.
The figure showing the state rotated 120 degrees counterclockwise from (b).

[Explanation of symbols]

Reference Signs List 1 pump for molten metal 2 molten metal 3 valve receiver 5 motor 6 drive shaft 7 spring 10 valve retainer 13 molten metal storage chamber 14, 15 flow pipe for inhaling molten metal into molten metal storage chamber of valve receiver 16 valve receiver Flow pipe for discharging molten metal from molten metal storage chamber 17 Upper inclined surface of valve receiver 20a Flow pipe for discharging molten metal in valve retainer 21 Discharge pipe 23a Air supply pipe 24a Exhaust pipe 25 Gas supply means 26 Gas exhaust means 28a Valve body Upper inclined surface 28b Lower inclined surface of valve body 29 Vent pipe in valve body 30, 31 Flow pipe in valve body 32 Lower inclined surface of valve presser

Claims (3)

[Claims] 1. A molten metal storage chamber of a metal molten metal pump is depressurized to suck the molten metal from the outside into the molten metal storage chamber, and pressurizes the molten metal storage chamber to discharge the sucked molten metal to the outside. In a pump for molten metal to be melted, a valve receiver having a molten metal storage chamber, a flow pipe for sucking the molten metal from the outside into the molten metal storage chamber, and a flow pipe for discharging the molten metal from the molten metal storage chamber to the outside. And an air supply pipe and an exhaust pipe combined with the valve receiver so as to be attracted to each other and connected to external air supply means and exhaust means.
A valve presser having a flow pipe for discharging the molten metal to the outside, and a movable pipe that is movable and rotatably sandwiched between the valve receiver and the valve presser, and a gas flow pipe. A valve having a flow tube for flowing the molten metal, and a pump for the molten metal. 2. A flow pipe in a valve body and a flow pipe for inhaling a molten metal from the outside into a molten metal storage chamber in a valve receiver are each constituted by at least two flow pipes. Communication between the two fluid pipes for sucking the molten metal from the outside into the chamber through one of the two fluid pipes in the valve body, and an air supply pipe or exhaust in the valve presser body Communication between the pipe and the molten metal storage chamber through a vent pipe in the valve body, and a flow pipe for discharging the molten metal from the molten metal storage chamber in the valve receiving body to the outside, and a flow pipe in the valve presser body. The communication through the other of the two flow pipes in the valve body is controlled by rotating while the valve body is pinched between the valve receiver and the valve presser. The pump for molten metal according to claim 1, wherein 3. A lower surface of a valve presser body abutting on an upper surface of a valve body and an upper surface of a valve receiver abutting on a lower surface of the valve body are each formed on an inclined surface. A flow pipe in the valve body, a flow pipe in the valve receiver, a flow pipe in the valve receiver, and an inclined surface corresponding to the lower surface of the valve presser and the inclined surface of the upper surface of the valve receiver are formed on the upper surface and the lower surface. The fluid pipes and the fluid pipes in the valve presser body are characterized in that the openings facing the inclined surfaces of the fluid pipes are communicated with each other by being aligned according to the rotation of the valve body. The pump for molten metal according to claim 1 or 2.