JPH012765A - Molten metal supply device for continuous casting equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an fjt-feeding device used in a continuous casting installation G for supplying molten metal from a ladle to a tandem.

[Prior Art] In continuous casting equipment, molten metal is once poured into a tundish, and then supplied from this tundish to the next process. In order to prevent oxidation of the molten metal poured into the tundish from the ladle, a connection nozzle, so-called long nozzle, is connected to the molten metal outlet of the ladle.
Therefore, the molten metal is injected into the tundish through this long nozzle.

By the way, after all of the molten metal in the ladle has been drained, the empty ladle will be replaced with a new ladle filled with molten metal. For this reason, the long nozzle must be removably connected to the molten metal outlet of the ladle.

For these reasons, continuous casting equipment is equipped with a molten metal supply device that has a long nozzle connected to a ladle near the tundish and that enables molten metal to be supplied from this ladle to the tundish.

On the other hand, when a new nozzle is positioned above the tundish, the position of the molten metal discharge port in this nozzle cannot be accurately determined, so the above molten metal supply device has a position adjustment that adjusts the horizontal position of the long nozzle. Fa+R and a holding mechanism that moves the long nozzle in the vertical direction and holds it against the molten metal discharge port of the ladle. The position adjustment mechanism consists of a base mounted on a fixed deck, a swing arm whose one end is connected to the base and can freely rotate in the horizontal direction, a link arm connected to the other end of the swing arm, and a link. The center portion is connected to the other end of the arm, and the control arm is manually operated by operation d.

According to the above-mentioned molten metal supply device, the operator moves the operating arm in directions perpendicular to each other in a horizontal plane via the swing arm and the link arm, and then the upper end of the long nozzle to which the holding lever is attached is moved. It can be aligned with the molten metal outlet of.

[Problems with the prior art] By the way, the distance between the above-mentioned fixed deck, which is positioned above the tundish, is relatively large, in some cases about 2 to 3 m, and each arm of the above-mentioned position adjustment mechanism is In particular, the swivel arm and the operating arm must also necessarily become longer. For this reason, the weight next to the position 1 adjustment machine is large, so the operator manually floats the operating arm, and when the long nozzle reaches the desired position, the movement of the operating arm is instantly stopped. Even if an attempt is made to do so, since the moment of inertia of the position adjustment mechanism is large, the operating arm, that is, the long nozzle, cannot be stopped instantaneously, and therefore, it becomes difficult to adjust the position of the long nozzle.

[Object of the invention] This invention was made based on the above-mentioned circumstances, and its object is to melt the ladle.
It is an object of the present invention to provide a molten metal feeding device for continuous casting equipment that allows easy alignment of a long nozzle, that is, seven connecting nozzles, with respect to an outlet.

[Summary of the Invention] The molten metal supply device u according to the present invention is provided with the above-mentioned position adjustment device, between the base and the swing arm, between the swing arm and the link arm, and between the link arm and the operation arm. A brake mechanism is provided at each arm-to-arm connection portion.

[Operations and Effects] As mentioned above, since brake mechanisms are provided between the base and the rotating arm, and in the continuous portion between each arm, the operation arm can be moved to connect to the ladle's molten JH outlet. When aligning the connecting nozzles, check the entire length of each of these arms! Even if the amount of Tt is large, when the connecting nozzle reaches the desired position, the rotation of each arm can be stopped instantaneously by the brake machine tM, which makes positioning of the connecting nozzle easier and easier. It can definitely be done.

In addition, the air pressure supplied to the pneumatic cylinder of the holding device 5 is
It can be easily maintained constant by the pneumatic control circuit, and therefore the pressing force of the long nozzle is also maintained constant.

[Embodiment of the Invention] An embodiment of the molten metal supply device of the present invention is shown in FIGS. 1 to 5.
This will be explained with reference to the figures. In FIG. 1, the continuous casting equipment has a fixed deck 9, and a tundish 5 is arranged near the fixed deck 9. Above this tundish 5, a ladle, that is, a ladle 4, which is transported by a transport device (not shown), is positioned at the irJ.
It has become a Noh performance.

A molten steel outflow lower as a molten metal discharge port is provided on the lower surface of the ladle 4, and a long nozzle 8 as a connection nozzle is connected to the molten steel outflow lower as described later. The molten steel flowing out from the molten steel outflow lower of the dollar 4 can be supplied -q into the tundish 5, and the molten steel in the tundish 5 is dispensed into several molds (not shown).

As described above, the molten metal supply device 1 that supplies the molten steel in the dollar 4 to the tundish 5 through the long nozzle 8 is installed on the fixed deck 9. It is equipped with Position adjustment device 2
As is clear from FIG. 2, the base 10 and the rotating arm 1
1, a link arm 12, and an operation arm 13. The platform 10 is fixed on a fixed deck 9, and a rotating arm 11 is attached to the base 10'' at a joint 19.
are connected via. Here, one joint is
It is composed of a thrust bearing that supports the swing arm 11 horizontally rotatably with respect to the base 10, and a clutch brake 16 as a brake mechanism. The clutch brake 16 has a braking function of braking the rotation of the swing arm 11, and also has a clutch function of operating with air pressure, which is fluid pressure, to engage and disengage the brake. One end of a link arm 12 is connected to one end of the swing arm 11 near the tundish 5, ie, the left end in FIG. 2, via a joint 20. This link arm 12 is connected to the swing arm 1
The link arm 12 extends in a direction perpendicular to the longitudinal direction of the link arm 12.
The other end of the operating arm 1 is parallel to the pivot arm 11.
3 through a joint 21.

Here, joints 20 and 21 are joints 19 and 19.
It has a similar structure to joint 20.
21 are respectively equipped with clutch brakes 17 and 18 which perform the same function as the clutch brake 16.

An operator is located at one end of the operating arm 13 located on the fixed deck 9 side: J! A handle 26 is provided for use in performing J alignment, and a holding device 3 is attached to the other end.

The holding device 3 includes a holding lever 14 and a pneumatic cylinder 15. The holding lever 14 has a central portion pivotally supported by a pin 24 at the end of the operating arm 13 on the opposite side from the handle 26, and is rotatable in a downward direction about the pin 24.

The pneumatic cylinder 15 is located on the upper surface of the operating arm 13.
It is located between the joint 21 and the pin 24 and is fixed to the operating arm 13 via a flange. The piston rod of the pneumatic cylinder 15 is the operating arm 1
3 and extends below the operating arm 13, and the tip of the piston rod is connected to one end of the holding lever 14 by a pin 22. That is, one end of the holding lever 14 is formed with a long length.
The pin 22 extends through the two elongated holes and a hole drilled in the end of the piston rod. Therefore, the holding lever 14 can be rotated 1-downward about the pin 24 by the expansion and contraction operation of the pneumatic cylinder 15. Holding lever 14
At the other end of the long nozzle 8 is a support t in the horizontal direction)
! ! The long nozzle 8 is suspended by the pin 25 so that it can move freely, so the long nozzle 8 is moved downward by the holding lever 14 by the expansion and contraction operation of the pneumatic cylinder 15, and this is done. As shown in FIG. 1, the upper end of the long nozzle can be pressed against the molten steel outflow lower of the droplet 4.

The expansion and contraction operation of the pneumatic cylinder 15 is controlled by a pneumatic control circuit 32 shown in FIG. 3, and the configuration of the pneumatic control circuit 32 will be explained below.

The pneumatic control circuit 32 is connected to the clutch brake 16.1 described above.
7.18 is also used in 4, and the pneumatic control circuit 32 is connected to the pneumatic supply J! which is not shown. A443, this pneumatic supply source is connected to the pneumatic regulating unit 33 via a connection point 46.

The air conditioning unit 33 is configured by connecting a filter, a regulator, and a relievator in series. Between the filter and the regulator of the air pressure adjustment unit 33, a solenoid valve 1-9 and a pressure regulating valve 4] are connected to +7. Ini 1
It is connected to 12 people. On the downstream side of the air pressure adjustment unit 33, there is a switching valve 40. Main valve 34, solenoid valve 37
and the solenoid valve 38 are connected to each other in a +1-7/11 manner.

The main valve 34 is a 5-point, 3-position electromagnetic nozzle control well, and its pressure port (P) is a pneumatic, 3-position electromagnetic control well.
Connected to 3. The two operating ports (A) and (13) of the main valve 34 are connected to flow paths 15a and 15, respectively.
It communicates with the pneumatic cylinder 15 via b. That is, in one flow path 15a, the operating port (A) of the main valve 34 is connected to the safety block valve 35, the throttle stop valve unit 44, and the pilot pressure reducing valve 3 with relief.
6, it communicates with the expansion port 27 of the pneumatic cylinder 15. On the other hand, in the other flow path 15b, the operating port (+3) of the main valve 34 is connected via the safety block valve 35 and the throttle stop valve unit 45.
It communicates with the deflation port 28 of the pneumatic cylinder 15 .

As shown in FIG. 3, the throttle bus stop valve units 44 and 45 are constructed by connecting two throttle bus stop valves in opposite directions.

A bypass path is provided in the flow path 15a to bypass the pilot pressure reducing valve 36, and a reverse valve is inserted in this bypass path to block the flow from the D flow side to the G flow side of the pilot pressure reduction valve 3b. There is.

An exhaust flow path extends from the flow path 15a between the expansion port 27 of the pneumatic cylinder 15 and the pilot pressure reducing valve 36, and a relief valve 42 is inserted in this exhaust flow path.

The exhaust flow path is connected to the tJI air side connection point 48.

Further, the relief port of the pilot pressure reducing valve 36 is also connected to the fJl: air flow path. On the other hand, an exhaust shunt connected to the exhaust flow path extends from between the contraction port 28 of the pneumatic cylinder 15 and the restrictor stop valve unit 45 in the flow path 15b. Relief valve 4
3 has been inserted. Therefore, the relief valve 43 also
Like the relief valve 42, it is connected to the exhaust side connection point 48.

The two return ports (R) of the main valve 34 are connected to the discharge side contacts 49 and 50, respectively, via each υ1 air flow path.
It is connected to the.

The above-mentioned regulating valve 41 is connected to the pilot port of the pilot pressure reducing valve 36. On the other hand, the operating port (A) of the electromagnetic valve 39 also mentioned above is switched to 1
It is connected to a pilot port of a switching valve 40 capable of 1J.

The switching valve 40 connected to the downstream side of the air pressure regulator 22 solenoid 33 is a two-point switch that is operated by pilot pressure being transmitted to its pilot port by switching the solenoid valve 39 described above. It is a 2-position pneumatic switching valve.

One port of the switching valve 40 is connected to the air pressure adjustment unit 33 as described above, and the other port is connected to the flow path 15a between the throttle-oriented reverse [L-valve unit 44 and the pilot pressure reducing valve 36]. It is connected.

As described above, the pressure ports (p) of the solenoid valves 37 and 38 are connected to the pneumatic adjustment unit 33, and the operating port (A) of the solenoid valves 37 is connected to the clutch brakes 17 and 18. Supply boats 30 and 31 are connected, respectively. On the other hand, the operating port (A) of the solenoid valve 38
Similarly, the supply port 29 of the clutch brake 16 is connected to the clutch brake 16 . The return port (1?) of each of the electromagnetic valves 37 and 38 is connected to the discharge side joint 47 via an exhaust flow path.

This pneumatic circuit 32 operates as follows.

FIG. 3 shows the inactive position. Compressed air is supplied from a pneumatic supply source (not shown) to the pneumatic pressure adjustment unit 33 via the artificial connection point 46 . This pneumatic adjustment unit 3
3, the air pressure of the compressed air is reduced to a predetermined pressure and acts on the pressure port of the main valve 34.
(It also acts on the solenoid valves 37 and 38. Since the main valve 34 is in the neutral position and the flow path from the pressure port to the operating port is blocked, no pressure acts on the pneumatic cylinder 15. At this time, the pneumatic cylinder 15 is held in a predetermined telescopic position by the action of the safety block valve 35.On the other hand, both the solenoid valves 37 and 38 are in the non-energized position, and in this position, the pressure port (P ) and the operating port (A) are in communication, so the pressure adjusted by the pneumatic adjustment unit 33 acts directly on the clutch brake 17, 18° 16.Clutch brake 17, 18
゜16 normally applies the brake by spring force and releases the brake by applying air pressure.
1 has been achieved. Therefore, the clutch brake 17,1
8.16 are in the released position when the solenoid valves 37 and 38 are respectively in the de-energized position.

Extend the pneumatic cylinder 15 and open the long nozzle 8.
In the case of H, the main valve 34 is switched to the raised position on the right side in the figure by an electric circuit (not shown). The pressure supplied from the air pressure adjustment unit 33 is transmitted from the main valve 34 to the flow path 15a on the left side in FIG. Via
It is supplied to the expansion port 27 of the pneumatic cylinder 15.

The back pressure of the pneumatic cylinder 15 is controlled by the throttle stop valve unit 45.
, via the flow path from the operating port (B) of the safety block valve 35 and the main valve 34 to the return port (R),
It is vented through the discharge connection point 49.

At this time, the flow layer of the compressed air supplied from the pneumatic adjustment unit 33 is throttled by the restrictor stop valves 44 and 45, which increases the expansion speed of the pneumatic cylinder 15, that is, the rise of the long nozzle 8. The speed is controlled to be approximately constant.

When the pneumatic cylinder 15 is extended and the long nozzle 8 is brought into contact with the molten steel outflow lower of the dollar 4 and then pressed, the solenoid valve 39 is operated in the non-energized position. The flow path from the pressure port (P) to the operating port (A) is blocked, and in the operating position, the pressure port (P) and the operating port (^) are communicated. By switching the solenoid valve 39 to the operating position, the pressure supplied from the pneumatic supply source is changed to the pilot pressure to the pneumatic switching valve 40 via the filter of the 99 N unit 33 and the solenoid valve 39. Become.

The pneumatic switching valve 40 is switched to the operating position by this pilot pressure. Thereby, air pressure is directly transmitted from the air pressure adjustment unit 33 to the downstream side of the pilot pressure reducing valve 36 via the switching valve 40.

The pilot pressure reducing valve 36 receives the pressure supplied from the air pressure regulating unit 33 and reduced and adjusted by the pressure regulating valve 41 as pilot pressure, and balances this pilot pressure with the pressure downstream of the pilot pressure reducing valve 36. , is configured to adjust the supply pressure to the pneumatic cylinder 15. When the pressure downstream of the pilot pressure reducing valve 36 becomes higher than the pilot pressure, this downstream pressure is urgently released via the relief of the pilot pressure reducing valve 36. If such a pilot pressure reducing valve 36 is used,
The supply pressure to the pneumatic cylinder 15 can be precisely adjusted. Therefore, the force with which the long nozzle 8 is pressed against the droplet 4 by the pneumatic cylinder 15 is kept constant. It is also possible to remotely control the pressure to the pneumatic cylinder 15 using the pressure regulating valve 41.

When lowering the pneumatic cylinder 15, the main valve 34 is switched to the lowered position on the right side in FIG. The pressure supplied from the pneumatic adjustment unit 33 is
5b, that is, is supplied to the contraction port 28 of the pneumatic cylinder 15 via the safety block valve 35 and throttle stop valve unit 45. At the same time, the back pressure is reduced to pneumatic cylinder 1
5 is discharged from the discharge side connection point 50 via the pilot pressure reducing valve 36, throttle stop valve unit 44, safety block valve 35 and main valve 34. At this time as well, the contraction speed of the pneumatic cylinder 15, that is, the downward speed of the long nozzle 8, is controlled to be substantially constant by the action of the throttle stopper valve units 45 and 44.

Reliefs connected between the pilot pressure reducing valve 36 and the bank account boat 27 of the pneumatic relief 15, and between the contraction port 28 of the pneumatic cylinder 15 and the throttle stop valve unit 45, respectively. Valves 42 and 43: Empty, T Ii/j +L before overload occurs in cylinder 15.

When fixing the clutch brakes 17 and 18,
Solenoid valve 37 is switched to the operating position. In the working position, the pressure port (P) is cut off from communication with other ports, and the working port (B) is in communication with the bottom 1-(+?). Therefore, clutch brakes 17 and 18
The inside of the cylinder is released via the solenoid valve 37, the exhaust flow path and the exhaust contact 47, and the clutch brake! -17 and 18 act on the play due to spring force and fix joints 20 and 21, respectively. Similarly, when the clutch brake 16 is to be fixed, the solenoid valve 38 is switched to the operating position. Inside the cylinder of the clutch brake 16,
Released via the solenoid valve 38, the exhaust flow path and the exhaust contact 48, the clutch brake 16 fixes the joint 19.

Next, with reference to FIGS. 4 and 5, the means for attaching the long nozzle 8 in the molten metal supply apparatus of the present invention will be described below. While the ladle 4 is being transported by a transport device (not shown), the molten metal supply device 1 is in a retracted position as shown in FIG. 4 in order to facilitate transport of the ladle 4. In the retracted position, the joins 1-19.20.21 are normally fixed.

The ladle 4 is placed at a predetermined position above the tundish 5 (4a
), the molten metal supply device 1 is
With the clutch brakes 16 and 17 fixed and the clutch brake 15 of the joint 19 released, the robot is turned around the joint 19 by the operator's handling to the ready position shown in FIG. In this preparation position, the long nozzle 8 is located near the molten n4 outlet 6 of the ladle 4. In the ready position, the clutch brake 16 is fixed to fix the seat 19, while the clutch brakes 17 and 18 are released to allow the joints 20 and 21, that is, the link arm 12 and the operating arm 13, to rotate automatically. becomes. In this state, the position of the upper end of the long nozzle 8 can be finely adjusted in the horizontal force direction by handling by the operator.

Subsequently, the upper end of the long nozzle 8 is aligned with the molten steel outflow lower of the ladle 4. After this, pneumatic cylinder 1
By extending 5, the long nozzle 8 is moved upwards.
Then, connect this long nozzle 8 to the 1 dollar 4/3 steel outflow lower. Here, by the action of the aforementioned pneumatic control circuit 32, the long nozzle 8 is pressed against the two-legged molten steel outflow lower with a constant pressing force. Finally, the ladle 4 is lowered to a predetermined position shown by a solid line in FIG. 1 with the long nozzle 8 pressed against the molten steel outflow lower, and the continuous casting operation is started at this position.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of an embodiment of the molten metal supply device of the present invention, Fig. 2 is a schematic plan view of the embodiment shown in Fig. 1, and Fig. 3 is a schematic diagram of the embodiment shown in Fig. 1. The pneumatic control circuit diagrams of the apparatus, FIGS. 4 and 5, are diagrams showing the position of the long nozzle in the apparatus of FIG. 1. 3... Push piece mechanism, 4... Ladle, 8... Connection nozzle, 10... Base, 11... Swivel arm, 12...
...Link arm, 13...Operation arm, 14...
Holding lever, 16.17.18...Clutch brake, 19°20.21...Joint. Applicant's agent Patent attorney Takehiko Suzue Figure 5

Claims (1)

[Claims] 1. A molten metal supply device for continuous casting equipment that supplies molten metal into a tundish from a ladle in which molten metal is stored, comprising: a base fixedly disposed near the tundish; A swing arm that is rotatably supported in the horizontal direction and extends toward the tundish, and is arranged parallel to the swing arm and operated by an operator on the base at the end located on the base side. an operating arm having an operating section;
a link arm that connects the intermediate portion of the swing arm and the operating arm and allows the operator to reciprocate the operating arm in the longitudinal direction and in a direction intersecting the longitudinal direction; and an end portion of the operating arm located on the tundish side. A holding lever is pivotally attached to the tundish for vertical rotation, and the tip of the holding lever is vertically attached to the tip of the holding lever, and the upper end of the ladle is positioned above the tundish. When aligned with the outlet, the connecting nozzle that supplies the molten metal in the ladle into the tundish through the molten metal outlet and the holding arm are rotated upward, and the upper end of the connecting nozzle is pressed against the ladle with a predetermined pressing force. a pressing mechanism for pressing and holding against the molten metal discharge port of the rotating arm; A molten metal for continuous casting equipment, characterized in that a brake mechanism is provided between the arm and the third connection part, the brake mechanism being remotely controlled by an operator to brake the rotation of each arm. Feeding device. 2. The molten metal supply device for continuous casting equipment according to claim 1, wherein the brake mechanism is comprised of an air brake.