JP2000210765A - Apparatus for transferring fixed quantity of molten metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability by installing a part or the whole of a molten metal sucking tank, an intermediate tank and a transfer tank at the outside of a furnace. SOLUTION: This apparatus for sucking the molten metal 7 and transferring it to a using position is composed of the molten metal sucking tank 6 for sucking the molten metal 1 from a holding furnace 10, the intermediate tank 12 for temporarily storing the molten metal 7 and a transfer tank 22 for transferring the molten metal sucked from the intermediate tank 12 by fixed quantity. And the molten metal sucking tank 1, the intermediate tank 12 and the transfer tank 22 are mutually connected with a transfer tube, and a sucking tube communicated with the holding furnace 10 for molten metal 7 is connected to the sucking tank 6. In the transfer tank 22, a transfer tube for transferring the molten metal to the using position is provided, and heaters and inactive gas supplying/discharging tubes 9, 20, 35 are provided in respective the tanks 6, 12, 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for quantitatively transferring molten metal in which all or a part of a hot water tank, an intermediate tank and a transfer tank are installed outside a furnace.

[0002]

2. Description of the Related Art Conventionally, there has been known an apparatus for quantitatively transferring a molten metal by supplying and discharging an inert gas (Japanese Patent Laid-Open No. 4-18 / 1990).
No. 7366).

[0003] Further, most of the above-mentioned apparatuses have adopted a charging type in which they are formed integrally with a furnace body or charged and installed in a furnace.

[0004]

Although the above-mentioned conventional devices each have a predetermined effect, the accuracy of the quantitative determination of the transfer is inadequate and improvement is required. There was room for improvement, such as making repairs easier and easier for damage to walls and other parts.

[0005] Further, when a hot water absorption tank is put into a holding furnace as in the prior art, thermal damage to the apparatus is large, and it has been unavoidable to shorten the service life. Further, in the embedded system (conventional), even if a part of the furnace is damaged, the whole furnace body is affected, and there is a problem that repair time, cost and labor are increased.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a hot water tank,
Since all or part of the intermediate tank and transfer tank are installed outside the furnace, repairs and so on are of course easy and easy,
The damage of each part of each tank was remarkably reduced, and the above-mentioned conventional problems were solved.

That is, the present invention is an apparatus for sucking molten metal and transferring it to a place of use, a hot water suction tank for sucking molten metal from a holding furnace, an intermediate tank for temporarily storing molten metal, and a suction tank for intermediate molten tank. A transfer tank for transferring the molten metal to a fixed amount.The suction tank, the intermediate tank, and the transfer tank are connected by transfer pipes, and the suction tank is connected to a suction pipe that communicates with a furnace for holding the molten metal. A fixed-quantity transfer apparatus for molten metal, wherein a transfer pipe for transferring the molten metal to a place of use is provided in the tank, and a heater and a supply / discharge pipe for an inert gas are provided in each of the tanks. Next, the water absorption tank, the intermediate tank and the transfer tank are all provided with a heat insulating material inside the metal outer tank, a heat resistant heat insulating material inside the heat insulating material, and a heat resistant heat insulating material inside the metal outer tank. And a hot water storage tank is provided in the storage furnace, and the hot water absorption tank or the hot water absorption tank and the intermediate tank can be put into a holding furnace. Also,
The transfer pipe connecting the intermediate tank and the transfer tank has a lower slope on the side of the intermediate tank, and the transfer tank is provided with temperature detecting means.

In the present invention, when a part is installed outside the furnace, it is necessary to connect a water suction tank installed inside the furnace and an intermediate tank installed outside the furnace by a transfer pipe.

In the above, when all the tanks are of the out-of-furnace type, a heater is inserted in each tank to prevent the temperature of the molten metal from dropping, and the transfer tank is provided with a heater and a temperature detecting means (for example, a thermoelectric device). By automatically controlling the temperature of the molten metal by adding a pair) and improving the accuracy of the transfer temperature,
Product accuracy can be improved.

If the outer periphery of each tank of the above-mentioned out-of-pile apparatus is reinforced by a metal outer wall, the strength of each tank can be remarkably improved. Each of the tanks has a heat insulating material provided inside a metal outer tank. In this case, even if the outer heat-insulating material and the inner heat-resistant heat-insulating material are of the same quality, even if a crack is formed due to thermal deformation by forming two layers,
Since the same crack does not reach the outside (metal outer tank) as it is, the inside crack is interrupted and there is no outflow of molten metal. Therefore, the durability is dramatically increased. So with the outer insulation,
If the inner heat-resistant heat insulating material and the heterogeneous heat insulating material are formed into two layers, the cracks are not continuous, and the cracks are not amplified. Two layers are more preferable. In addition, if the heterogeneous heat insulating material is used in two layers, the heat insulating efficiency is improved as a whole because of the interruption (unequal) of the heat insulating ability.

The outer heat insulating material is, for example, heat-resistant cement, and the heat-resistant heat insulating material is, for example, silicon carbide and other various heat-resistant ceramics.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a hot water absorption tank, an intermediate tank and a transfer tank are used in parallel, but one or all tanks are installed outside the furnace. Therefore, when installing all tanks outside the furnace, the outer tanks of all tanks are made of metal, heat insulating material is installed inside, and heat resistant heat insulating material is installed inside, and molten metal is inserted inside. Each tank is provided with an inert gas pressurizing means and a heater, and the transfer tank is provided with a temperature detecting means to control the transfer temperature.

[0013]

An embodiment of the present invention will be described with reference to the drawings.
A heat insulator (for example, heat-resistant cement) 2 is mounted inside a metal outer tank (for example, stainless steel) 1, and a heat-resistant heat insulator (for example, silicon carbide) 3 is mounted inside the heat insulator 2. A plug 5 is fitted inside the hot water storage chamber 4 to form a hot water tank 6 (FIG. 3). In the hot water tank 6, a heater 8 that penetrates the plug 5 to heat the molten metal 7 is installed, and an inert gas supply / discharge pipe 9 is installed. The hot water tank 6 is provided with a hot water pipe 11 that communicates with the holding furnace 10, and a transfer pipe 13 for transferring the hot water to the intermediate tank 12 is provided obliquely. The opening is extended and communicated with the inner end of the water suction pipe 11. FIG.
The middle 27 is a plug at the outlet.

Next, in the intermediate tank 12, a heat insulating material 14 is mounted inside a metal outer tank 15, a heat insulating material 16 is mounted inside the heat insulating material 14, and hot water is stored inside the heat resistant heat insulating material. A chamber 17 is provided, and a plug 18 is fitted into the hot water storage chamber 17. The hot-water storage chamber 17 has a heater 19 for heating the molten metal.
Is inserted, and an inert gas supply / discharge pipe 20 is inserted and installed. Further, a transfer pipe 21 connected to the transfer pipe 13 of the hot water absorption tank 6 is provided, and a transfer path 23 is provided to the transfer tank 22. The transfer path 23 is formed by a gap between the side wall of the hot water storage chamber 17 provided in the heat-resistant heat insulating material 16 and the partition wall 24 and is connected to the upper transfer path 25.

The transfer tank 22 of the present invention comprises a metal outer tank 3.
0, a heat-insulating material 29 is installed inside the heat-insulating material 28, a hot-water storage chamber 31 is provided inside the heat-insulating material 29, and a plug 32 is provided in the hot-water storage chamber 31. Was fitted.

In the hot water storage chamber 31, a heater 33 and a thermocouple 34 are inserted, and an inert gas supply / discharge pipe 3 is provided.
5, and the output of the thermocouple 34 is
(Not shown) to automatically control the melt temperature to a set value.

The transfer tank 22 includes the intermediate tank 1
A transfer path 36 that can be connected to the transfer path 25
A transfer path 37 is provided for transferring the molten metal to a use place (mold) for a predetermined amount, and the transfer path 37 is connected to the transfer path 26.

In the above embodiment, since the holding furnace 10 and the hot water storage chamber 4 of the hot water tank 6 communicate with each other by the hot water suction pipe 11, the surfaces 7a and 7b of the molten metal 7 are almost the same. However, if the inside of the hot water storage chamber 4 is depressurized by the exhaust of the supply / discharge pipe 9, the molten metal surface 7b can be raised (FIG. 1).

Next, when an inert gas is injected into the hot water storage chamber 4 from the supply / discharge pipe 9 as indicated by an arrow 40, the molten metal in the hot water storage chamber 4 is transferred to the transfer pipe 13 as indicated by arrows 38 and 39. 21 and enters the hot water storage chamber 17 (FIG. 3). When the molten metal in the hot water storage chamber 17 reaches a predetermined amount, the inert gas is exhausted from the supply / discharge pipe 9 as indicated by arrow 41, and the molten metal in the holding furnace 10 is again stored as indicated by arrow 42. It flows into the chamber 4 (FIG. 1).

Next, when an inert gas (for example, nitrogen gas) is pressed into the supply / discharge pipe 20 as indicated by an arrow 43, the hot water storage
Since the molten metal in 7 is pressurized on the molten metal surface, it enters the hot water storage chamber 31 through the transfer paths 23 and 25 as shown by arrows 44 and 45. In this case, since the lower wall 25a of the transfer path 25 on the hot water storage chamber 31 side is higher than the transfer path 25 of the transfer path 25, the lower wall 25a controls the level of the molten metal in the hot water storage chamber 31. Can be. That is, the total amount of hot water in the hot water storage chamber 31 can be kept constant (FIG. 3).

In the hot water storage chamber 31, a heater 33 is provided.
Since the thermocouple 34 is inserted, the temperature of the molten metal can be accurately controlled, and the molten metal at a constant temperature can always be transferred.

Next, when an inert gas is injected from the supply / discharge pipe 35 as indicated by an arrow 46, the molten metal in the hot water storage chamber 31 passes through transfer paths 37 and 26 as indicated by arrows 47 and 48 and is used. Transfer to required location. For example, the transfer amount can be controlled by the supply time of the inert gas. In this case, by adjusting the pressure in the hot water storage chamber 17, it is possible to prevent the inert gas from flowing back through the transfer paths 23 and 25.

In the above, if the pressure of the inert gas press-fitted from the supply / discharge pipe 27 is made higher than the pressure of the inert gas press-fitted from the supply / discharge pipe 35, the supply of the molten metal while feeding the molten metal in the hot-water storage chamber 31 Can be continuously transferred.

[0024]

According to the present invention, since part or all of the hot water absorption tank, the intermediate tank and the transfer tank are installed outside the furnace, the outer tank of each tank can be a metal outer tank. This has the effect of dramatically increasing the durability of each tank.

Further, since the heat insulating material of each tank has two layers,
Even if the heat-resistant heat insulating material (inner layer) is cracked, there is an effect that the molten metal can be prevented from flowing out between the inside and outside heat insulating materials without reaching the metal outer tank.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment in which an upper furnace type is removed in the same manner.

FIG. 3 is a sectional view taken along the line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a sectional view taken along the line CC in FIG. 2;

FIG. 6 is a plan view of the embodiment showing the arrangement of the furnace and the tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal outer tank 2 Insulation material 3 Heat insulation material 4 Hot water storage room 5 Plug body 6 Hot water absorption tank 7 Melt 8 Heater 9 Supply / discharge pipe 10 Holding furnace 11 Hot water absorption pipe 12 Intermediate tank 13 Transfer pipe 14 Heat insulation material 15 Metal outside Tank 16 Heat-resistant heat insulating material 17 Hot water storage room 18 Plug body 19 Heater 20 Supply / discharge pipe 21 Transfer pipe 22 Transfer tank 23, 25 Transfer path 24 Partition wall 26 Transfer path 27 Plug body 28 Heat insulating material 29 Heat resistant heat insulating material 30 Metal Tank 31 Hot water storage room 32 Plug body 33 Heater 34 Thermocouple 35 Supply / discharge pipe 36, 37 Transfer path

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Hirokazu Shirakawa 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 4E014 LA09 LA10

Claims (5)

[Claims] 1. A device for sucking molten metal and transferring the molten metal to a place of use. The device absorbs molten metal from a holding furnace, an intermediate tank for temporarily storing molten metal, and a device for absorbing molten metal from the intermediate tank. It consists of a transfer tank for transferring to a fixed amount.The hot water tank, the intermediate tank and the transfer tank are connected by transfer pipes respectively, and the hot water tank is connected to a suction pipe communicating with a holding furnace for the molten metal. A fixed amount transfer device for molten metal, comprising: a transfer pipe for transferring the molten metal to a place of use; and a heater and an inert gas supply / discharge pipe installed in each of the tanks. 2. The heat absorption tank, the intermediate tank and the transfer tank each have a heat insulating material inside the metal outer tank, a heat resistant heat insulating material inside the heat insulating material, and the heat resistant heat insulating material. 2. The apparatus according to claim 1, wherein a hot water storage chamber is provided inside the material. 3. The apparatus according to claim 1, wherein one or both of the hot water absorption tank and the intermediate tank can be charged into a holding furnace. 4. The apparatus according to claim 1, wherein the transfer pipe connecting the intermediate tank and the transfer tank has the intermediate tank side inclined at a low angle. 5. The apparatus according to claim 1, wherein a temperature detecting means is provided in the transfer tank.