JP2003266163A - Method and system for pouring molten metal in centrifugal casting facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a molten metal pouring technique for centrifugal cast tube with which high productivity is secured, working environment is improved, stable operation is performed and the cast tube having the uniform tube thickness and stable quality characteristic is obtained. <P>SOLUTION: A molten metal pouring ladle 14 having large capacity which can cast a plurality of cast tubes is used, and in the case of transporting the ladle from the last casting work to the next casting work, the casting is performed by using a device 11 to be able to quickly exchange the ladles and a means for surely controlling a molten metal dropping position from the ladle 14 to a chute 25 and molten metal pouring speed. The molten metal dropping position is controlled while considering displacement to the fixed point of a molten metal tapping hole 24 according to the tilting of the ladle, and the molten metal pouring amount is controlled based on the molten metal surface area in the ladle. When at least first cast tube is cast, the ladle 14 is tilted to an angle just before starting the pouring of the molten metal, and then, a treatment for remained molten metal and slag is discharged into a remained metal pot by traversing and turning over the ladle 14. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for injecting molten metal into a mold of a centrifugal casting apparatus in manufacturing cast iron pipes in a centrifugal casting facility, which receives molten metal from a ladle for distributing hot water. After that, the present invention relates to a casting technique for improving the work efficiency until the molten metal is poured into the mold to improve the productivity, and to obtain a cast pipe with stable dimensions and quality.

[0002]

2. Description of the Related Art Conventionally, when a cast iron pipe is manufactured by a centrifugal casting equipment, when casting a cast pipe by a centrifugal casting apparatus, as shown in FIG. 5, a predetermined amount of molten metal is kept at a predetermined temperature. Discharge the molten metal 2a from the furnace 1 to the hot water ladle 3,
Centrifugal casting equipment 1 in which molten metal 2b is designated from ladle 3 for hot water distribution
3 should be replenished to a stationary ladle 5 installed close to the stationary ladle 5, and pouring from the stationary ladle 5 into a triangular ladle 6 as a pouring ladle, and into a mold 7 provided in the centrifugal casting device 13. The molten metal 2c for one time is discharged, and the triangular ladle 6 is melted through the chute (the "pouring chute" in this specification) 25 of the pouring trough 8
d has a slight inclination angle θ with respect to the horizontal,
It is poured into the above-described high-speed rotating mold 7 and the casting pipe 9 is centrifugally cast. The pouring of water from the triangular ladle 6 into the mold 7 is performed using the triangular ladle 6
By tilting about its axis of rotation. In the figure, reference numeral 4 is a trough truck.

Thus, after the casting of one casting pipe is completed, the casting pipe 9 is pulled out from the casting mold 7 to maintain the casting mold 7, and the pouring trough 8 is serviced, and then the casting cycle of the next casting pipe is continued. to go into. That is, the molten metal discharged from the stationary ladle 5 to the triangular ladle 6 in the meantime is poured into the mold 7 by the triangular ladle 6 via the pouring chute 25, and the next casting pipe 9 is centrifugally cast. To do. While the work of the casting cycle is continued, the molten metal 2b is replenished from the hot water distribution ladle 3 to the stationary ladle 5 during this period to prepare for tapping into the triangular ladle 6.

In the pouring process in the centrifugal casting facility, in the operation of pouring the molten metal 2d from the triangular ladle 6 which is a pouring ladle into the mold 7, the pouring flow rate of the molten metal (per unit time to the mold) It is particularly important to control the injection amount of the molten metal 2d) and the pouring temperature with high accuracy in order to control the pipe thickness dimension of the casting pipe 9. If the molten metal injection flow rate is too high, the tube thickness will be too thick, and the number of steps will increase due to the need for machining in the subsequent process, and the yield will decrease, while if the molten metal injection flow rate is too low. The pipe thickness becomes too thin, resulting in defective products. The pouring temperature is a factor that controls the viscosity of the molten metal, and has a great influence on the control of the injection flow rate, and also has an influence on the quality such as the metal structure of the cast pipe product.

Therefore, conventionally, there has been proposed a technique for controlling the pouring temperature of the molten metal while controlling the pouring flow rate of the molten metal into the mold. Japanese Unexamined Patent Publication No. 11-179512 discloses a technique for controlling the tilting speed of a triangular ladle 6 as a pouring ladle and making the thickness of a pipe uniform by controlling the tilting speed. The technology is disclosed. That is, the tilting device is configured so that the amount of hydraulic oil supplied to the drive cylinder device that tilts the triangular ladle can be controlled, and the tilting speed of the triangular ladle is controlled to control the molten metal to the mold. Injection flow rate (amount of molten metal poured into the mold per unit time)
In addition, the molten metal injection flow rate is made relatively small at the initial stage of pouring, in which the pouring temperature is relatively high and the pouring flow is good, and the pouring temperature decreases and the pouring flow decreases. At the end of the pouring, the flow rate of the molten metal is relatively increased to make the pipe thickness uniform in the pipe longitudinal direction (hereinafter referred to as prior art 1).

Further, in JP-A-5-277710, the temperature control of the molten metal in the holding furnace 1 is automated, so that there is no problem, but there is a variation in the time from the holding furnace 1 to casting. The following technology is disclosed as a technology for preventing the occurrence of variations in the pouring temperature due to the above. That is, after the holding furnace, as an automatic pouring device, a predetermined amount of molten metal is received from the holding furnace, and a ladle device that cuts out the molten metal by a predetermined amount and the molten metal supplied from this ladle device are received and then raised. It is possible to heat and hold the molten metal, which is heated and held at a predetermined cutting flow rate (cutting amount per unit time) into a triangular ladle that is a ladle for pouring hot water into the mold. By arranging the temperature raising furnace device configured as described above, the temperature of the molten metal poured into the mold is controlled, and the amount of molten metal remaining in the ladle device is controlled with high accuracy (hereinafter, referred to as Prior Art 2). That).

Further, in Japanese Patent Application Laid-Open No. 9-1320 (Japanese Patent No. 3079018), a shape peculiar to a triangular ladle 6 which is conventionally used as a ladle for pouring molten metal into a mold 7 for centrifugal casting is disclosed. , So that the surface area of the molten metal in the ladle when pouring it into the mold 7 is almost constant, without using a ladle whose vertical cross-section through the tap is fan-shaped When pouring into the mold, the molten metal is placed in the upper part of the mold, and the molten metal is poured into the inside of the mold. There is disclosed an automatic pouring method that can be performed without depending on the accompanying change in the pouring streamline of the molten metal (hereinafter referred to as prior art 3). According to the method of Prior Art 3, it is said that safe and reliable automatic pouring work can be performed.

[0008]

However, even with the above-mentioned prior art, the following problems necessary for developing a pouring method and a pouring device in a centrifugal casting facility intended by the present inventors are solved. Is difficult. That is, in order to perform a stable operation while ensuring high productivity by a centrifugal casting facility, and to obtain a cast pipe having a uniform pipe thickness and stable quality characteristics, (1) was discharged from the holding furnace. How to suppress the temperature drop of the molten metal until it is poured into the mold after receiving the molten metal controlled within the specified temperature range in the ladle for hot water distribution, and the molten metal temperature during pouring into the mold Is an important issue, and (2) how to control the pouring flow from the pouring ladle to the mold, that is, the pouring amount to the mold per unit time. Control of injection flow rate (or so-called pouring speed)
An important issue is how to control the pouring streamline and the position at which the pouring flow starts to flow into the pouring chute. In addition, (3) In solving the problems (1) and (2), it is important to control or reduce equipment costs and operating costs.

The present inventors have conducted extensive studies in order to solve the above problems.

First, for controlling the pouring flow from the pouring ladle to the mold, the techniques disclosed in Prior Art 1 and Prior Art 3 are effective, but for one casting pipe. It is difficult to sufficiently suppress the decrease in the pouring temperature at the end stage while pouring the molten metal from the pouring ladle into the mold. The reason is that the pouring ladle that has received the amount of molten metal required to cast one casting pipe, that is, a so-called triangular ladle is poured into the mold, so the ratio of the molten metal in the pouring ladle is The surface area (molten metal weight / molten metal (upper surface area + total contact area with inner surface of ladle)) becomes relatively large, and the minimum specific surface area is limited. Therefore, there is a limit to the suppression of heat dissipation from the molten metal.

As a measure against this, if the prior art 2 is applied, a considerable effect can be obtained in suppressing the decrease in the pouring temperature at the end of the pouring, but as a pouring ladle, the molten metal accommodating capacity of one casting pipe is required. As long as the ladle that it has is used, its effect is still not sufficient. Further, according to the prior art 2, by providing the temperature raising furnace device, it is possible to control the molten metal temperature of each triangular ladle which is a pouring ladle within a predetermined temperature range, which is effective. Since an additional device for raising the temperature of the molten metal, such as a high-frequency heating device, needs to be newly provided in the ladle body of the temperature raising furnace device, an expensive equipment cost must be added.

Therefore, an object of the present invention is to comprehensively solve the above-mentioned unsolved problems, to perform stable operation while ensuring high productivity, and to provide a cast pipe having a uniform pipe thickness and stable quality. It is to provide a pouring method and a pouring device in a centrifugal casting facility that can be obtained.

[0013]

Means for Solving the Problems The inventors of the present invention have obtained the following findings as a result of repeated diligent tests and studies for solving the above problems.

1. The molten metal receiving capacity of the pouring ladle for pouring the molten metal into the mold is expanded and changed to one capable of receiving the molten metal required for casting a plurality of casting pipes. At that time, the capacity of the pouring ladle should be taken into consideration in consideration of the dimensions of the casting pipe and the balance with the capacity of other related equipment and equipment constituting the entire centrifugal casting equipment and the process plan. . By doing so, the following effects can be exhibited. The specific surface area of the molten metal in the pouring ladle is larger than that in the case of pouring from the pouring ladle containing the molten metal for one casting tube as in the past. Since it decreases to the value calculated by the 2/3 power of the increase rate,
The amount of change over time in the temperature drop of the molten metal becomes smaller according to this calculated value. Therefore, it is possible to remarkably suppress the temperature drop of the molten metal at the final stage of the molten metal pouring into the mold, and at the same time, the conventional stationary ladle (see reference numeral 5 in FIG. 5) and triangular ladle (see reference numeral 6 in FIG. 5). , The capacity is the amount of molten metal for one casting pipe) and the heat loss chance of the molten metal over two stages is one of the large-capacity pouring ladles.
Heat loss chance only at the stage. Therefore, there is a possibility that the control level value of the molten metal temperature in the holding furnace can be lowered. Furthermore, since the time required from the end of the casting of a given casting pipe to the start of the casting of the next casting pipe is significantly shortened, the preparation of molten metal in the pouring ladle is The waiting time for pouring is eliminated when the rate at which the casting of the casting pipe can be started is controlled, and the casting cycle time is shortened.
In this way, the inventors of the present invention have an appropriate large capacity pouring ladle (for example, a pouring ladle having a capacity of about 5 times that of the conventional triangular ladle) which is several times the conventional capacity. By adopting and modifying its incidental equipment, or by adopting a ladle system equipment for large capacity pouring when constructing a new centrifugal casting equipment, it is possible to exert an effect on controlling the pouring temperature and shortening the casting cycle time. I focused on.

2. The large-capacity pouring ladle described in the above item 1 was used for the previous casting operation, and a plurality of predetermined casting pipes were cast to obtain a large-capacity pouring ladle in which the molten metal became empty. From the pouring device of No. 3, and then whether the large-capacity ladle for molten metal used for the next casting operation, which is also described in the above item 1, is delivered to the pouring device or is taken over by the pouring device. Design and install a ladle changing device that is configured to allow quick exchange of large capacity ladle. As a basic design, the large-capacity pouring ladle that was emptied in the previous casting operation was received by the ladle changing device, and then the large-capacity used for the next casting operation in which the molten metal has been received. The pouring ladle and the arrangement position will be quickly exchanged with each other. For example, it is an image of a trolley in the form of a circular table, and it is a ladle changing trolley that is driven to rotate around the center of a circle. It suffices if it is constructed so that it can be placed facing each other on the circumference. By doing so, the following effects can be exhibited. Compared with the conventional pouring process using a combination of a stationary ladle and a triangular ladle (see reference numerals 5 and 6 in FIG. 5, respectively), two large-capacity pouring like the ladle changing device described above. The ladle for pouring is placed on the ladle changing device while the molten metal in one ladle for pouring is being poured into the mold by the pouring device. In addition, the molten metal can be replenished from the ladle for hot water distribution and prepared. Therefore, there is an increased chance that the effect of exhibiting the effect of eliminating the waiting for the pouring described in the item 1 will be exerted. Also,
When such a ladle changing device is provided for a plurality of lines of pouring device and casting device, it is designed so that three or more large-capacity pouring ladles are arranged.

3. The large-capacity pouring ladle described above is received, and a pouring device for enabling automatic pouring operation is arranged in the mold of the centrifugal casting device. To stabilize the automatic pouring operation, tilt the ladle for large-capacity pouring,
It is effective to set a target position where the pouring streamline should collide with inside the pouring chute for dropping and pouring the molten metal, and to provide a control mechanism for dropping and pouring the molten metal to this target point. Further, it is desirable to provide a control mechanism for the injection flow rate (the amount of molten metal injected into the mold per unit time) of being poured into the mold via the pouring chute. Then, in order to configure a mechanism for controlling the pouring position of the pouring streamline and the control flow rate of pouring into the mold, the rotary tilt drive means of the large capacity pouring ladle, and the movement drive in the vertical and horizontal directions. It has been noticed that a stable automatic injection operation can be performed by providing a means and a control device for executing the predetermined control programs.

The present invention has been made based on the above findings and ideas, and the summary thereof is as follows.

The method for pouring molten metal in a centrifugal casting facility according to claim 1 is necessary for casting a plurality of casting pipes in the step of injecting the molten metal into the mold of the centrifugal casting apparatus in the centrifugal casting facility for producing cast iron pipes. It is characterized in that the molten metal in a pouring ladle having a capacity for accommodating the molten metal is automatically injected into the mold of the centrifugal casting apparatus by using a pouring apparatus.

According to a second aspect of the present invention, there is provided a method for pouring molten metal in a centrifugal casting facility, wherein in a step of injecting molten metal into a mold of a centrifugal casting apparatus in a centrifugal casting facility for producing cast iron pipes, a predetermined ladle for distributing hot water is provided. Prior to pouring the molten metal into the pouring ladle used in the next casting operation installed in the exchange device, and pouring the molten metal in the pouring ladle into the mold,
The ladle for pouring, which was used to fill the mold in the previous casting operation and became empty, was transferred from the prescribed pouring device to the ladle changing device and returned. The pouring ladle containing the molten metal to be used for the next casting operation mounted on the exchange device is transferred to the pouring device, and then the pouring liquid is transferred to the pouring device. A method of automatically pouring the molten metal in the ladle into the mold of the centrifugal casting apparatus using the pouring apparatus, and as the pouring ladle, the previous casting operation and the next time In any of the casting operations, one that has the ability to contain the molten metal required to cast multiple casting pipes is used, and the characteristic is that the molten metal for each of the multiple casting pipes is automatically injected into the mold Is to have.

The pouring method in the centrifugal casting equipment according to claim 3 is the method according to claim 1 or 2,
When pouring the molten metal in the pouring ladle, which has the capacity of the molten metal required to cast a plurality of casting pipes, into the mold,
When casting at least the first casting pipe, the pouring ladle is tilted in advance to the angle immediately before the start of pouring, and the molten metal injection into the mold is immediately started. is there.

A pouring method in a centrifugal casting facility according to a fourth aspect is the pouring method according to any one of the first to third aspects, further comprising the molten metal in the pouring ladle for the casting mold. After the pouring is completed, or after the pouring is interrupted, the pouring ladle is moved in a direction perpendicular to the longitudinal direction of the line of the centrifugal casting device, and then the pouring ladle is used during the pouring. Inclining to the opposite side with respect to the tilting direction, and adding an operation to discharge the residual hot water and residue in the pouring ladle, or the molten metal and residual material to be poured into the mold to a predetermined residual hot water pot It has characteristics.

According to a fifth aspect of the present invention, there is provided a method for pouring molten metal in a centrifugal casting facility according to any one of the first to fourth aspects, wherein the molten metal in the pouring ladle is poured by using the pouring device. The target of automatic control performed when pouring by automatic operation into the mold of the centrifugal casting apparatus is that pouring is performed while automatically controlling so that the pouring flow falls to a target position in the pouring chute to the mold. Is to have.

According to a sixth aspect of the present invention, there is provided a method of pouring molten metal in a centrifugal casting facility, wherein the molten metal in the pouring ladle is poured by using the pouring device. The automatic control target performed when pouring into the mold of the centrifugal casting apparatus by the automatic operation is characterized in that the pouring flow rate of the molten metal to be poured into the mold is controlled automatically.

According to a seventh aspect of the present invention, there is provided a method of pouring in a centrifugal casting facility according to any one of the fourth to sixth aspects, wherein the pouring flow is a target in a pouring chute into the mold. As a method of automatically controlling the pouring ladle to fall to a position, the tilt angle of the pouring ladle is controlled by rotationally driving the pouring ladle around the axis of the rotary shaft of the pouring ladle. In addition to controlling, set the position on the absolute coordinate axis of the start point of the molten metal from the outlet of the pouring ladle at the start of pouring, or set a virtual initial tapping center point close to the start point of the molten metal. However, the position on the absolute coordinate axis of the virtual initial tapping center point thus set is controlled and moved vertically and horizontally by the support mechanism of the pouring ladle, or vertically or horizontally. It has characteristics.

The pouring method in the centrifugal casting equipment according to claim 8 is the pouring method according to claim 6 or 7, wherein the pouring flow rate of the molten metal injected into the mold is automatically controlled. It is characterized in that the rotation angular velocity of the pouring ladle is automatically controlled according to the surface area of the molten metal in the pouring ladle.

The pouring system in the centrifugal casting facility according to claim 9 is the pouring system in the centrifugal casting facility for casting cast iron pipes, which comprises the following devices (a), (b) and (c): It is a pouring system in a centrifugal casting facility, which is characterized by That is, (a) the first pouring ladle that was emptied by pouring molten metal into the mold in the previous casting operation,
While being delivered from the pouring device and mounted, the molten metal for pouring into the mold in the next casting operation is received from the ladle for distributing hot water, and the other molten metal containing the received molten metal is received. A pouring ladle, and after receiving the one pouring ladle from the pouring device, the pouring device receives the other pouring ladle containing the molten metal. (B) The one pouring ladle that has been emptied by injecting the molten metal into the mold in the previous casting operation is delivered to the ladle exchanging device, and then Receiving the other pouring ladle containing the molten metal from the ladle exchange device, injecting a predetermined amount of the molten metal into the mold from the other pouring ladle in the next casting operation, and, The other empty ladle for pouring was handed over to the ladle changing device. Configured pouring device as, and,
(C) The molten metal in the one pouring ladle is poured into the mold by the pouring device, and then the molten metal in the other pouring ladle is cast into the mold by the pouring device. A centrifugal casting device configured to be cast into the casting pipe to cast the casting pipe.

According to a tenth aspect of the present invention, in the pouring system in the centrifugal casting equipment, the pouring ladle is provided in the pouring device in the longitudinal direction of the line of the centrifugal casting device. A ladle traverse mechanism for pouring is provided to move the pouring ladle at right angles to the transverse direction of the pouring ladle by the pouring ladle traverse mechanism, and the centrifugal casting device is used. It is characterized in that a residual hot water pot for discharging the residual hot water and the dregs inside the ladle for pouring is provided on the side opposite to the installation side.

According to an eleventh aspect of the present invention, in the pouring system for centrifugal casting equipment according to the ninth or tenth aspect of the present invention, the pouring device is provided with the other pouring ladle received. A rotating and tilting mechanism for tilting the pouring ladle around the axis of the rotary shaft and a vertical / horizontal moving mechanism for moving the other pouring ladle vertically and horizontally. It has a special feature.

According to a twelfth aspect of the present invention, in the pouring system for centrifugal casting equipment according to the eleventh aspect of the present invention, the rotating and tilting mechanism of the other pouring ladle is for controlling the operation of the rotating and tilting. A pan tilt control device is provided, and a ladle movement control device for controlling the movement of each of the other pouring ladles in each direction is provided in the vertical / horizontal movement mechanism of the other pouring ladle. It is characterized by being provided.

According to a thirteenth aspect of the present invention, the pouring system in the centrifugal casting facility is the same as the invention according to any one of the ninth to twelfth aspects. Both have the ability to receive the required amount of molten metal for casting a plurality of the casting pipes from the ladle for hot water distribution, and to store this molten metal until it is poured into the mold. It is characterized by being a thing.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of a pouring device and a pouring system in a centrifugal casting facility according to the present invention will be described.

FIG. 1 is a schematic side view of a pouring system according to a preferred embodiment of the present invention, and FIG. 2 is a schematic plan view of the system. 1 and 2, 11 is a ladle changing device, 12 is a pouring device, and 13 is a centrifugal casting device.

The molten metal held at a predetermined temperature is received from a holding furnace (see reference numeral 1 in FIG. 5), and the molten metal is transferred from the ladle 3 for distributing hot water to the ladle changing device 11.
A predetermined amount of molten metal 2e is supplied to the large capacity pouring ladle 14a. At this time, the amount of molten metal received by the large-capacity pouring ladle 14a is the same as the amount of molten metal poured into the mold 7 (of the centrifugal casting device 13), for example, the amount of molten metal required to cast five casting pipes. Is. Here, the shape of the large-capacity pouring ladle is not such that the longitudinal cross-sectional shape in the front-rear direction is triangular or fan-shaped, and ladle of other shapes, for example, a cylindrical pouring ladle may be used. . The reason is that if the relationship between the tilt angle of the ladle and the upper surface area of the molten metal in the ladle is clear, the flow rate of tapping water by tilting the ladle (when pouring into the mold, It is possible to control (corresponding to the flow rate).

Large-capacity pouring ladle 14 containing the molten metal 2e
a is a predetermined carrier such as a crane 15 and a ladle changing device 1
1 turntable 16 is placed at a predetermined position (position (A) in FIGS. 1 and 2).

The ladle changing device 11 has a rotating shaft 16 at the center.
Turntable 16 that rotates in the horizontal plane about a
And the turntable 1 via the table roller 16b
A drive unit (not shown) for rotating 6 is mounted, and a table carriage 17 mounted with these for traveling in a predetermined direction on a rail 17b. The ladle changing device 11 rotates the turntable 180 degrees while placing two large-capacity pouring ladles on the turntable 16 to switch the mutual positions of the ladle. That is, the turntable 16
The large-capacity pouring ladle 14a containing the molten metal placed at the upper position (A), and the edge of the turntable 16 around the rotating shaft 16a (position ((position in FIG. 1 and FIG. 2 The position of the large-capacity pouring ladle 14b opposite to B)) is exchanged by rotating the turntable 16 by 180 degrees. However, large capacity pouring ladle 14b
Is an empty ladle as described below.

The mutual replacement of the large-capacity ladle for pouring is based on the following necessity. That is, in order to continue the casting operation, the pouring device 12 hands over the large-capacity pouring ladle 14b ′ in which the molten metal has become empty as a result of pouring the mold 7 in the previous casting operation, and then , Large-capacity pouring ladle 14a containing molten metal required for the next casting operation
It is necessary to receive and pour the molten metal into the mold 7. Therefore,
In the ladle changing device 11, the pouring device 12 thus quickly performs the handing operation of the empty large-capacity pouring ladle 14b ′ and the receiving operation of the large-capacity pouring ladle 14a containing molten metal. In order to be able to perform it, it was introduced as a device for swiftly changing the positions of the empty large capacity pouring ladle 14b on the turntable received from the pouring device 12 and the large capacity pouring ladle 14a containing the molten metal. It is a thing.

Here, the turning operation of the turntable 16 performed by the ladle changing device 11 is performed by remote manual operation.
Alternatively, the wheel load applied to the wheels 17a of the table carriage 17 on which the turntable 16 is mounted is measured, and the automatic measurement is performed by a computer controller (not shown) based on the measured value information.

As the pouring device 12, a ceiling-mounted type is illustrated in FIGS. 1 and 2, but it may be a ground-mounted type. As described above, the pouring device 12 hands over the large-capacity pouring ladle 14b ′ in which the molten metal has become empty to the ladle exchanging device 11, and also the large-capacity pouring ladle containing the molten metal for the next casting operation. 14a is received and moved to a position where casting can be performed (see large capacity pouring ladle 14a 'in the figure).
When moving the large capacity ladle 14a for pouring molten metal,
The pouring device 12 winds it up by an elevating frame 19 and an elevating drive unit 20 installed on the front-rear carriage 18.
The front-rear moving carriage 18 is moved forward in the direction of the centrifugal casting device 13 (leftward in the figure), and it is unwound at a predetermined position, and the large-capacity pouring ladle 14 is provided near the pouring chute 25.
The hot water outlet 24 of a'is aligned and ready for the next casting operation.

FIG. 3 shows a structure of the pouring device and an automatic control flow chart. In order to enable automatic pouring control, the pouring device has a moving device 27 and a moving control means 28 for the large capacity pouring ladle 14, and a tilting device 29 and a tilting control means 3.
0 is provided.

As described above, the moving device 27 has an operation function of moving the large-capacity pouring ladle 14 to a predetermined position as a casting start preparation operation, as well as pouring the pouring flow into the mold. In order to control the falling position in the hot water chute 25 to a predetermined position, it has a movement adjusting function for appropriately adjusting the position of the large capacity pouring ladle 14. The moving direction is divided into a vertical direction, a front-back direction in the horizontal plane (casting line direction, X direction in FIG. 2), and a left-right direction (Y direction in FIG. 2). As the vertical moving device 27a, the lifting frame 19 and the lifting drive unit 20 are provided, as the front-back moving device 27b, the front-back moving carriage 18 and the front-back moving driving unit 31 are provided, and as the left-right moving device 27c, the left-right moving carriage 2 is provided.
1 and a left-right movement drive unit 32 are provided.

On the other hand, the tilting device 29 controls the pouring flow rate (the pouring amount per unit time) during pouring into the mold.
The tilt angle and tilt speed of the large-capacity pouring ladle 14 are controlled, and the tilt adjustment function is provided.

The pouring device is also equipped with a large capacity ladle 1 for pouring.
4, a load cell 33 is provided as a molten metal weight measuring device, and an encoder 34 is provided as a measuring device for measuring the inclination angle of the large capacity pouring ladle 14. Then, the moving device 27
The tilting device 29 is used for the movement control means 2 during pouring into the mold.
8 and the tilt control means 30 control as follows.

The control operation of the movement device 27 by the movement control means 28 is as follows.

Based on the information from the pan position detector 36,
A large-capacity pouring ladle 14 is moved by a moving device 2 to prepare pouring.
At 7, it is moved to a predetermined position above the pouring chute 25. Then, in response to a molten metal pouring start signal, the large capacity pouring ladle 14 is tilted by driving its tilting rotary shaft at a predetermined tilting speed. At the same time as this tilting, large capacity pouring ladle 14
The tilt angle of the tilting rotary shaft of the is measured by the encoder 34 for detecting the tilt angle, and the large-volume pouring ladle 14 for the front-rear moving carriage 18 and the elevating frame 19 is measured according to the tilt angle.
Is moved by a distance x in the front-rear direction (X direction in FIGS. 1 and 2) and a distance z in the vertical direction (Z direction in FIG. 1), so that the pouring flow reaches a predetermined position of the pouring chute 25. Adjust to fall. Here, the moving distances x and z in the vertical direction and the front-back direction of the large-capacity pouring ladle 14 whose movement is controlled according to the inclination angle are obtained by the following derivation formulas (1) and (2).

[0045] _{x = L o cosθ 0 -L 0} cos (θ + θ 0) ‥‥ (1) z = L 0 sin (θ + θ 0) -L 0 sinθ 0 ‥‥ (2) However, L _0, θ _0, θ Is as shown in FIG. 4 which will be described later, and later, together with the derivation process of the equations (1) and (2), L ₀ ,
θ ₀ and θ will be described.

In the above, the analog signal detected by the encoder 34 is converted into a digital signal by the AD converter 37 and sent to the storage / calculation device 35.
The memory computing device 35 has a relational expression between the inclination angle θ of the large-capacity pouring ladle 14 and the displacement of an imaginary fixed point O _i , which will be described later, near the tap opening 24 of the ladle 14 (the derivation formula (1 ) And (2)) are stored, and the position of the large-capacity pouring ladle 14 is corrected by the digital signal of the tilt angle and the arithmetic storage signal. The corrected position of the ladle 14 is transmitted to the front-rear movement drive unit 31 and the elevation drive unit 20 via the DA converter 39. When the signal issued by the position movement command device 41 is input to the storage / calculation device 35, it is corrected by the ladle position correction signal stored here, and D
It is transmitted to the front-back movement drive unit 31 and the elevating drive unit 20 of the large capacity pouring ladle 14 via the -A converter 39.

As an abnormal case, the position of the large-capacity pouring ladle 14 was shifted in the left-right direction with respect to the axis of the pouring chute 25 at the start of casting, based on the information from the pan position detecting device 36. When it is detected, the memory operation device 35 'causes the left-right movement drive unit 32 to move the large capacity ladle 1 for pouring.
The centering signal of 4 is transmitted. As described above, the movement control unit 28 controls the movement device 27.

In FIG. 4, the initial state is θ _{0 with} respect to the horizontal direction.
Large-capacity pouring ladle 14 at an inclination angle of
4 is an explanatory view of a situation when the center C ₀ of the rotating shaft 40 of 4 is further rotated by θ and the inclination angle is changed from θ to θ + θ ₀ , and the pouring of the molten metal into the mold at the initial position is started. FIG. 6 is a diagram for explaining the displacement of a virtual initial tapping center point O _i which is set close to the molten metal drop start position from the tapping port 24 at the time. In FIG. 4, (b) is a detailed enlarged view of the vicinity of the tap hole 24 in (a). The X direction is the horizontal direction of the forward direction (centrifugal casting apparatus side) passing through the virtual initial tapping center point O _i , the Z axis direction is the vertically upward direction passing through the center point O _i , and the X-Z axis is An absolute coordinate axis is used, and the virtual initial tapping center point Oi is set as its origin (0, 0). Here, when the position of the initial tapping center point Oi after the inclination angle of the large capacity pouring ladle 14 changes from θ to θ + θ ₀ is O _i ′, and its coordinates are (−x, −y),
As is apparent from FIG. 4, the above-mentioned expressions (1) and (2) are obtained. However, L ₀ is the distance between the rotation center C ₀ of the large pouring ladle 14 and virtual initial pouring center point Oi.

On the other hand, since the surface shape of the molten metal in the large-capacity pouring ladle 14 always exhibits a substantially horizontal surface, the initial movement direction of the molten metal flow from the molten metal outlet 24 is always horizontal. Therefore, when the initial speed is constant and the inclination angle increases by θ, the position of the large capacity pouring ladle 14 is moved by y in the X-axis direction and z in the Z-axis direction. Thereby, the pouring flow into the mold can be dropped to a fixed position in the pouring chute. In this case, the locus of the rotation center C ₀ of the large-capacity pouring ladle 14 is centered on the virtual initial tapping center point Oi because the virtual initial tapping point Oi is displaced to the point O _i ′. Trajectory R ₁ that recedes in the direction away from the pouring chute (the right side in FIG. 4B) than the arc R
Becomes However, when the initial velocity of the outlet flow from the outlet port 24 decreases due to, for example, an increase in viscosity due to a decrease in temperature of the outlet flow, the direction closer to the pouring chute than the locus R ₁ (FIG. 4 (b ), The above equations (1) and (2) must be modified so as to take a trajectory that has advanced to the left.

Next, the control operation of the tilting device 29 by the tilting control means is as follows.

The analog signal detected by the encoder 34 is converted into a digital signal by the AD converter 37 'and sent to the storage operation device 35'. The storage / calculation device 35 'stores the relationship between the inclination angle of the large-capacity pouring ladle 14 and the surface area of the molten metal in the ladle 14, and stores the digital signal of the inclination angle and the pouring speed command device. 38
The tilting speed at this location is corrected by the signal from the above and the above-mentioned operation memory signal. As the storage method, the change of the surface area of the molten metal is input to the storage / calculation device 35 'by calculation, or the molten metal contained in the large capacity pouring ladle 14 is actually poured into the mold, The so-called teaching playback method is used in which the relationship between the tilt angle obtained by the pouring work, the pouring speed, and the pouring time is stored.

The tilting speed of the large-capacity pouring ladle 14 is corrected so that the pouring flow rate (pouring amount per unit time) poured from the ladle 14 into the mold is constant during pouring. The corrected tilt speed signal is transmitted to the tilt drive unit 23 via the DA converter 39 ′. When the speed signal generated by the pouring speed command device 38 is input to the storage / calculation device 35 ', it is corrected by the tilt speed correction signal stored therein, and a large capacity is supplied via the DA converter 39'. The tilting device 29 is transmitted to the tilting drive unit 23 of the pouring ladle 14 to control the tilting device 29.

In this way, the tilting angle and tilting speed of the large-capacity pouring ladle 14 are controlled, and at the same time, the moving device 27 is controlled by the moving control means 28, which is shown in FIG. Rotating center C of large capacity ladle 14 for pouring
₀ is controlled to move along a predetermined arcuate locus (for example, R ₁ or R ₂ ) of the virtual outlet center point Oi of the outlet.

In the process of pouring the molten metal into the mold, the load cell 33 of the measuring device provided in the pouring device 12
Therefore, a large-capacity ladle for pouring 1 equivalent to the pouring amount for one mold
4 receives the displacement signal of the weight of the molten metal in 4 and stops the tilting of the large-capacity pouring ladle 14 and tilts it in the opposite direction by a predetermined tilt angle to stop pouring.

As described above, the horizontal large-capacity pouring ladle 14 wound up by the pouring device 12 has its tap hole 24 located near the pouring chute 25 by the pouring device 12. The tilting device 29 including the tilting frame 22 and the tilting drive unit 23.
To tilt. As a result, the molten metal in the pouring ladle 14 is poured into the mold 7 mounted on the casting carriage 10 via the pouring chute 25 and the pouring trough 8.

In the present invention, the large-capacity pouring ladle 14 capable of manufacturing a plurality of casting tubes with one ladle is used. Therefore, the molten metal in the pouring ladle 14
When casting the second casting pipe, it is necessary to tilt the pouring ladle 14 from the horizontal state to the pouring angle by the tilting device 29 for pouring the molten metal into the mold 7. For a certain amount of time. As a result, the cycle time becomes long, resulting in a decrease in production efficiency, and further, a heat dissipation loss may cause a decrease in the temperature of the molten metal poured into the mold 7.

Therefore, in order to prevent such a decrease in the production efficiency and the pouring temperature, at the time of casting at least the first casting pipe, a large-capacity pouring device in a horizontal state wound by the pouring device 12 is used. As shown by the dotted line in Fig. 1, the ladle 14a 'is tilted in advance to the angle immediately before the start of pouring, and when the mold 7 mounted on the casting carriage 10 reaches a predetermined position, the mold is immediately moved. It is preferable that the pouring into 7 is started.

That is, depending on the diameter of the casting pipe to be cast,
Since the pouring amount into the mold 7 changes, the pouring ladle 14 is tilted to the angle immediately before the start of pouring according to the pouring amount at that time. By doing so, the molten metal in the ladle 14 can be poured into the mold 7 in a substantially fixed time.

As a result, the cycle time is shortened, the production efficiency can be prevented from lowering, and further, the melt temperature can be prevented from lowering due to heat radiation loss. When casting the second and subsequent casting pipes with the molten metal of the pouring ladle 14, the pouring ladle 14 has already been tilted by a predetermined angle for casting the previous casting pipe. Therefore, it is not always necessary to perform the pre-tilt described above, but of course, it is preferable to pre-tilt when the need arises.

Next, an example of the pre-tilt angle of the pouring ladle 14 described above will be shown. That is, when the pouring ladle 14 containing the molten metal reaches the pouring position by the pouring device 12, the total weight of the ladle is measured by the load cell 33 attached to the pouring device 12, and the measurement is performed. Based on the value, the pre-tilt angle is calculated by the formula of pre-tilt angle = [(total ladle weight-molten metal weight) / (constant number according to pot capacity)]-(set tilt angle).

For example, when the total weight of the ladle is 1890 kg, the weight of the molten metal is 1300 kg, and the set tilt angle is 9 degrees, the pre-tilt angle is [(1890-1300) / 50, where the constant number corresponding to the capacity of the pan is 50. ] -9 = 3 degrees.

According to the continuous tact cycle time,
When the next mold is prepared in the centrifugal casting apparatus, the next pouring is started by the procedure described above. In this way, ladle for large capacity pouring 1
When the casting of the predetermined number of casting pipes scheduled from 4 is completed, the molten metal and slag remaining in the large-capacity pouring ladle 14 are discharged to the residual molten metal pot indicated by the reference numeral 42 in FIG.
As shown in the figure, the residual hot water pot 42 is provided as a part of the pouring device 12, and the large-capacity pouring ladle 14 is placed in a direction perpendicular to the line longitudinal direction of the centrifugal casting device 13 ( In the same figure, it is a position close to the ground-corresponding position of the left / right moving carriage rail 21a, which constitutes a part of the pouring ladle traverse mechanism to be moved in the Y-axis direction), and has a large capacity pouring ladle. It is disposed at a right angle to the transverse direction of the pot 14 (the above-mentioned left-right direction) and on the side opposite to the side on which the centrifugal casting apparatus 13 is installed. It should be noted that the disposition position of the residual hot water pot 42 is advantageous in ensuring the disposition location of the accessory mechanism of the centrifugal casting apparatus 13 and the storage location of the accessory parts by avoiding the area adjacent to the centrifugal casting apparatus 13 as described above.

The pouring device 12 hands the ladle 14 for large-capacity pouring in which the residual hot water and the slag are empty to the ladle changing device 11,
The large-capacity pouring ladle 14 containing the molten metal for the next casting is received, and the next casting operation is started.

The remaining hot water pot 42 cools the molten metal of the large capacity pouring ladle 14 by urgently stopping the casting work and promptly performing the remaining hot water treatment when an abnormality occurs in the pouring work into the mold.
It also has a function as a device for preventing coagulation and the like. 1 and 2, 10a is a casting carriage rail, 18a is a front-rear carriage carriage rail, 18b is a front-rear carriage carriage overhead beam, 21b is a left-right carriage carriage overhead beam, 26
Is the trough body.

[0065]

EXAMPLE A test of an example of casting a cast pipe was conducted using a centrifugal casting facility equipped with the ladle changing device 11, the pouring device 12 and the centrifugal casting device 13 described in the embodiments. The large-capacity pouring ladle 14 is fan-shaped in shape and has a molten metal storage capacity of 1350 kg.
It has a molten metal storage capacity of 5 pipes for general pipes and seismic pipes of various sizes of 0 mmφ. Also,
It was equipped with a ladle lid to prevent the molten metal from radiating heat.

On the other hand, a test of a comparative example in which a cast pipe was cast using a centrifugal casting facility outside the scope of the present invention was also conducted. The main configuration and operating conditions of the centrifugal casting equipment in the comparative example are shown in FIG.
It has a centrifugal casting equipment configuration according to the conventional equipment shown in Fig. 5, and in particular, does not have a ladle changing device and has a capacity of a triangular ladle 6 (see Fig. 5) which is a ladle for pouring molten metal into a mold. Has a molten metal storage capacity of one for general pipes and seismic resistant pipes of various sizes.
The molten metal conveyed from the hot water supply ladle 3 to the stationary hot water ladle 5 is supplied from the stationary hot water ladle 5 for each casting pipe (for each casting mold). Then, the pouring operation into the mold was performed manually by visual pouring.

The test operation results of the centrifugally cast pipes in the examples are summarized as follows by appropriately comparing them with the test operation results of the centrifugally cast pipes in the comparative example.

1. Stability of casting work and productivity of casting pipes: Switching from visual pouring to automatic control pouring, development of large-capacity ladle system, development of ladle changer system, etc. The stability of the work was remarkably improved, the operation stability was improved, the original capability of the centrifugal casting equipment was fully exerted, the casting cycle time was shortened, and the productivity of the casting pipe was improved.

2. Quality and yield of casting pipes: The development of a large-capacity ladle system for pouring and the development of a ladle changer system suppresses the decrease in pouring temperature at the end of casting into the mold and controls the pouring temperature between castings. By reducing the fluctuation and developing the above-mentioned systems and the automatic pouring system mainly for the movement control and tilt control of the large-capacity pouring ladle, the pouring flow rate of the molten metal into the mold can be kept constant and The accuracy of the pouring amount was improved, and as a result, the improvement of the pipe thickness accuracy of the casting pipe reduced the number of defective products, improved the quality, and improved the product yield.

3. Working environment: With the development of the automatic pouring system of the present invention, the working environment for pouring is remarkably improved, and at the same time, it contributes to effective arrangement of personnel.

As described above, it was revealed that the examples significantly improve the operability, productivity, quality and environment.

[0072]

According to the present invention, the stability of casting operations and the productivity of cast pipes are improved, and the number of defective cast pipes is reduced.
It is possible to improve quality and product yield, improve the pouring work environment, and effectively allocate personnel.
It is possible to reduce the manufacturing cost of centrifugally cast pipes, to secure the elasticity of the manufacturing capacity, and to improve the high heat working environment. It is possible to provide a pouring method and a pouring system in such a centrifugal casting facility, which brings industrially beneficial effects.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a pouring system of the present invention.

FIG. 2 is a schematic side view of the example pouring system of the present invention shown in FIG.

FIG. 3 is a configuration and automatic control flow chart of an example of a pouring device according to the present invention.

[Fig. 4] In controlling the movement of the large-capacity pouring ladle in the present invention, the distances in the front-rear direction and the vertical direction of the tap hole reference point that are displaced when the large-capacity pouring ladle is tilted. It is a figure explaining.

FIG. 5 is an example of a casting process outline view of a casting pipe by a conventional centrifugal casting facility.

[Explanation of symbols]

1 Holding furnace 2a, 2b, 2c, 2d, 2e Molten metal 3 Hot water ladle 4 Trough truck 5 Fixed ladle 6 Triangle ladle 7 Mold 8 Pouring trough 9 Cast tube 10 Casting truck 10a Casting truck rail 11 Ladle replacement Device 12 Pouring device 13 Centrifugal casting device 14 Large capacity pouring ladle 14a, 14a'Large capacity pouring ladle (with molten metal) 14b, 14b'Large capacity pouring ladle (empty molten metal) 15 Crane 16 Turntable 16a Rotating shaft 16b Table roller 17 Table carriage 17a Wheel 17b Rail 18 Front-rear carriage 18a Front-rear carriage rail 18b Front-rear carriage upper beam 19 Lifting frame 20 Lifting drive unit 21 Left-right moving carriage 21a Left-right moving carriage rail 21b Left-right Mobile trolley overhead beam 22 Large-capacity pouring ladle tilting frame 23 Large-capacity pouring ladle tilting drive unit 24 Tap opening 25 Pouring chute 26 Trough main body 27 Moving device 27a Vertical moving device 27b Front-rear moving device 27c Left-right moving device 28 Movement control means 29 Tilt device 30 Tilt control means 31 Front-rear movement driving part 32 Left-right movement driving part 33 Load cell 34 Encoder 35, 35 'Storage computing device 36 Pan Position Detection Device 37, 37 'A-D Converter 38 Pouring Speed Command Device 39, 39' D-A Converter 40 Rotating Shaft (Large Capacity Ladle for Pouring) 41 Position Movement Command Device 42 Remaining Hot Water Pot C ₀ Rotation center (center of rotation axis of ladle for large capacity pouring) O _i Virtual initial center point of tapping at tap opening at the start of tapping

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B22D 41/06 B22D 41/06 (72) Inventor Hideto Takasugi 1-8-1, Uchikanda, Chiyoda-ku, Tokyo No. Nihon Cast Iron Pipe Co., Ltd. (72) Inventor Shinichi Kasahara 1-8-1 Kanda, Chiyoda-ku, Tokyo Nihon Cast Iron Pipe Co., Ltd.

Claims (13)

[Claims] 1. A pouring ladle having the ability to contain the molten metal required for casting a plurality of casting pipes in the step of pouring the molten metal into the mold of a centrifugal casting apparatus in a centrifugal casting facility for producing cast iron pipes. A pouring method in a centrifugal casting facility, characterized in that the molten metal inside is poured into the mold of the centrifugal casting apparatus by an automatic operation using a pouring apparatus. 2. In the step of injecting the molten metal into the mold of the centrifugal casting equipment in the centrifugal casting equipment for producing cast iron pipes, it is used in the next casting operation from the ladle for hot water distribution to the predetermined ladle exchange equipment. Prior to pouring the molten metal into the pouring ladle and pouring the molten metal in the pouring ladle into the mold, the molten metal used for pouring the mold in the previous casting operation After transferring the empty pouring ladle from the predetermined pouring device to the ladle changing device and returning it, the molten metal used for the next casting operation mounted on the ladle changing device is The contained pouring ladle is transferred to the pouring device, and the molten metal in the pouring ladle transferred to the pouring device is centrifugally cast using the pouring device. A method of pouring into the mold of the apparatus by automatic operation, and further,
As the pouring ladle, in any of the previous casting work and the next casting work, a pouring ladle having the ability to contain the molten metal necessary for casting a plurality of casting pipes is used, and A method for pouring molten metal in a centrifugal casting facility, characterized in that the molten metal for a casting pipe of a book is poured into a mold by an automatic operation. 3. When pouring at least the first casting pipe when pouring the molten metal in a pouring ladle having a capacity for holding the molten metal required for casting the plurality of casting pipes into the mold The centrifuge according to claim 1 or 2, wherein the pouring ladle is tilted in advance to an angle immediately before the start of pouring, and the molten metal injection into the mold is immediately started. Method of pouring in casting equipment. 4. The pouring method according to claim 1, further comprising pouring the molten metal in the pouring ladle into the mold or interrupting the pouring. After that, the pouring ladle is moved in a direction perpendicular to the line longitudinal direction of the centrifugal casting device, and then the pouring ladle is tilted to the opposite side to the tilting direction at the time of pouring, The method of pouring in a centrifugal casting facility, characterized in that the residual hot water pot and the residual hot water in the pouring ladle, or the operation of discharging the molten metal and the residual hot water to be injected into the mold are added to the residual hot water pot. 5. The automatic control target performed when the molten metal in the pouring ladle is automatically injected into the mold of the centrifugal casting device using the pouring device is a pouring flow to the mold. 5. The pouring is performed while automatically controlling so as to drop to a target position in the hot water chute.
The method for pouring molten metal in the centrifugal casting equipment according to any one of 1. 6. An automatic control target performed when automatically injecting the molten metal in the pouring ladle into the mold of the centrifugal casting device by using the pouring device is the molten metal to be injected into the mold. The pouring method in the centrifugal casting equipment according to any one of claims 1 to 5, wherein pouring is performed while automatically controlling the pouring flow rate. 7. The pouring method according to claim 4, wherein the pouring flow is automatically controlled so as to drop to a target position in a pouring chute to the mold. Centering around the axis of the rotating shaft of the pouring ladle, the pouring ladle is controlled and driven to control the tilt angle of the pouring ladle, and the pouring at the start of the pouring is performed. For the pouring of the molten metal, the position on the absolute coordinate axis of the start point of the molten metal from the tap of the ladle for hot water or the position on the absolute coordinate axis of the virtual initial tap point set near the start point of the molten metal is set. A pouring method in a centrifugal casting facility, which is carried out by controlling and moving vertically and horizontally by a ladle support mechanism, or vertically or horizontally. 8. The pouring method according to claim 6 or 7, wherein the method of automatically controlling the pouring flow rate of the pouring molten metal into the mold is performed by adjusting the surface area of the pouring molten metal in the pouring ladle. Accordingly, a pouring method in a centrifugal casting facility, which is performed by automatically controlling the rotational angular velocity of the pouring ladle. 9. A pouring system in a centrifugal casting facility for producing cast iron pipe, comprising the following devices (a), (b) and (c): . (A) The first pouring ladle that has been emptied by pouring the molten metal into the casting mold in the previous casting operation is transferred from the pouring device and mounted, and is poured into the casting mold in the next casting operation. For receiving the molten metal from the ladle for distributing hot water, and mounting another ladle for pouring in which the received molten metal is stored, and the ladle for pouring is the pouring device. A ladle changing device configured such that the pouring device receives the other pouring ladle containing the molten metal after receiving the molten metal from the pouring device (b) pouring the molten metal into the mold in the previous casting operation. Then, the one pouring ladle that has become empty is delivered to the ladle exchanging device, and then the other pouring ladle containing the molten metal is received from the ladle exchanging device. In the next casting operation, the specified amount of the molten metal is poured into the mold from the other pouring ladle. Then, the pouring device (c) configured to deliver the other empty pouring ladle to the ladle changing device (c) by the pouring device. The centrifugal casting device configured to inject the molten metal into the mold, and then inject the molten metal in the other pouring ladle into the mold to cast the casting pipe. 10. The pouring device is provided with a pouring ladle traverse mechanism for moving the pouring ladle in a direction perpendicular to a line longitudinal direction of the centrifugal casting device. On the side opposite to the transverse direction of the pouring ladle by the ladle traverse mechanism for pouring, and the side opposite to the installation side of the centrifugal casting device, the residual hot water and the residue in the pouring ladle are 10. The pouring system in the centrifugal casting equipment according to claim 9, wherein a residual hot water pot for discharging the hot water is provided. 11. The pouring device further comprises: a tilting mechanism for tilting the received pouring ladle, which is received, around an axis of a rotary shaft of the pouring ladle. The pouring system in the centrifugal casting equipment according to claim 9 or 10, further comprising a vertical / horizontal moving mechanism for moving the ladle for pouring in a vertical direction and a horizontal direction. 12. The latitudinal tilt control device for controlling the operation of the rotational tilt is provided in the rotation tilting mechanism of the other pouring ladle, and the vertical tilt of the other pouring ladle is controlled. The centrifugal casting equipment according to claim 11, wherein the horizontal movement mechanism is provided with a ladle movement control device for controlling the movement of the other pouring ladle in the respective directions. Pouring system in. 13. The one pouring ladle and the other pouring ladle receive molten metal in an amount necessary for casting a plurality of the casting pipes from the ladle for distributing hot water. The molten metal pouring system in a centrifugal casting facility according to any one of claims 9 to 12, characterized in that the molten metal has the ability to be stored until it is poured into the mold.