JPH0141423B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a slab connecting hardware, a top processing hardware, etc., which is used for continuous casting of cast slabs of different steel types by being introduced into molten steel in a mold in continuous casting equipment. The present invention relates to a method of feeding and an apparatus for the same.

(Prior art) In continuous casting equipment, for example, in order to continuously cast slabs of different steel types without interrupting the injection of molten steel into the mold, hardware for connecting slabs is inserted into the joint of both slabs. A continuous casting method is being implemented in which the length of the slab portion in which different steel components are mixed is made as short as possible by making the slabs continuous, thereby improving yield and workability.

In continuous casting of this type of slab of different steels, first
After finishing the last injection of molten steel, this first
The drawing of the slab by the molten steel is stopped, the slab connecting hardware is put into the molten steel in the mold, and after it is locked on the solidified shell in the mold, the second step is carried out in the next step.
The method used is to inject molten steel and connect slabs of different steel types.

(Problems to be Solved by the Invention) By the way, the above-mentioned operation of charging the slab connecting hardware into the mold has conventionally involved charging the molten steel into the center from above the mold during the solidification shell formation process of the first molten steel in the mold. This type of work is generally performed while visually checking and correcting it, and requires considerable effort and time in a high-temperature environment, and usually involves two or more workers. This is a very dangerous job.

The present invention has been made in view of the above points, and has been made for the purpose of replacing all conventional manual operations with mechanical operations.

(Means for Solving the Problems) The gist of the present invention to achieve the above object is that when a cast piece connecting hardware etc. is introduced into a mold of continuous casting equipment, the central upper part of the mold is The base is moved in the opposite direction, the carriage is lowered from the base along the guide, and the hardware clamped by the clamp device installed on the carriage is thrown into the molten steel in the mold. After detecting that the metal object has come into contact with the coagulation shell,
A method for inserting slab-connected metal fittings into continuous casting equipment, which is characterized by separating the metal fittings from the clamps and raising a carriage, and a method for properly carrying out this method. A base that is moved by a moving means is provided on the upper side of the center of the base, and first and second carriages that move up and down along a guide are disposed on the base. , a carriage elevating means is provided between the first and second carriages, the second carriage is provided with a hardware clamping device, and the elevating means provided between the first and second carriages is provided with: A device for feeding slab-connected metal fittings, etc. of continuous casting equipment, characterized by being equipped with a detector for detecting the pressure of the metal fittings in contact with a solidification shell.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a sectional view taken along line a-a in FIG. 1, and FIG. 3 is a front view of the clamp device.

In the figure, 1 is the base, which can be connected to the tundish car of continuous casting equipment and moved.
Alternatively, it may be constructed entirely separately and moved to a position on the upper side of the mold by a dedicated moving means.

2 is a pair of guides installed vertically on the front of the base;
3 and 4 are first and second carriages arranged vertically with respect to this guide 2, 5 is a first lifting cylinder arranged between the first carriage 3 and the base 1, and 6 is a first 1, and both the second carriages 3, 4
By the operation of the first lifting cylinder 5, both the first and second carriages 3 and 4 are moved up and down simultaneously, and by the operation of the second lifting cylinder 6, a second lifting cylinder is disposed between them. Only the second carriage 4 moves up and down.

7 is a protrusion extending from the second carriage 4 to a position above the mold A; 8 is a pair of guides provided on the protrusion 7; 9 is a clamping device disposed so as to be movable horizontally and longitudinally along the guide 8; is a pair of clamp bases 10 and 11 that extend downward from both sides of the clamp base 10 and are pivoted back-to-back and have hooks 13 at their lower ends that engage hanging rods C of hardware B. Consisting of a clamp 12 and a clamp actuation cylinder 14 disposed across the upper ends of both clamps 12, the cylinder 1
4, the hardware B is clamped and released by both clamps 12.

FIG. 4 is a fluid pressure circuit diagram of the cylinders arranged in each of the above components.

In an embodiment, high pressure air is used as the working fluid.

In the figure, 15 is a high-pressure air supply pipe connected to a high-pressure air supply source (not shown) via a pressure reducing valve 16 to maintain a predetermined pressure, and 17 is this pipe 15.
and the first lifting cylinder 5 are connected via a switching valve 18, and the first lifting cylinder 5 is equipped with a combination of a check valve and a throttle valve on both the head side and the rod side. More speed controller 1
9, high pressure air is supplied and discharged. 2
0 is a branch pipe connecting the high-pressure air supply pipe 15 and the second lifting cylinder 6 via a switching valve 21;
A speed controller 22 connected in series and a pressure reducing valve 2 are connected to the head side of the second lifting cylinder 6.
3, high pressure air is supplied and discharged via the speed controller 24, and a pressure switch 25 is inserted to detect the discharge pressure. That's what I do.

A branch line 26 connects the high-pressure air supply line 15 and the clamp actuation cylinder 14 via a switching valve 27.

(Operation) In the above configuration, the operation will be explained next. In the standby state, the first lifting cylinder 5 is operated by the switching valve 18.
High pressure air is supplied to the head side of the second lifting cylinder 6 through the switching valve 21, causing it to expand, and high pressure air is supplied to the rod side of the second lifting cylinder 6 through the switching valve 21, causing it to contract. Both carriages 3, 4 are in the raised position.

Therefore, the hardware B clamped by the clamp 12 of the clamp device 9 is suspended at a high position.

From this state, by moving the base 1, the hardware B is moved to a fixed position above the mold A and stopped.

First, by operating the switching valve 18, the first lifting cylinder 5 is retracted at high speed until it reaches its stroke end. Then, the hardware B descends to a position where it is very close to the molten steel in the mold.

Note that the first lifting cylinder 5 and the second lifting cylinder 6 are operated simultaneously, and the first lifting cylinder 5
The first and second lifting cylinders 5 and 6 are arranged so that when the hardware B reaches its stroke end, the metal object B descends to a position where it is very close to the molten steel in the mold.
It is also possible to adjust the rate of descent.

Subsequently, when the second lifting cylinder 6 is extended at a low speed by operating the switching valve 21, the hardware B enters the molten steel D at a desired speed as the cylinder 6 extends. At this time, during the extension of the second lifting cylinder 6, the hardware B is locked to the upper end of the coagulation shell E within the mold.

When the hardware B is locked to the upper end of the coagulation shell E,
The pressure state on the rod side (exhaust side) of the second lifting cylinder 6 changes as shown in Fig. 5, so when the pressure on the rod side becomes lower than point P shown in the figure, the pressure switch 25 is activated. It is adjusted so that it is activated, and based on this, it is determined that the metal object B has come into contact with the coagulation shell E.

However, since the buoyancy of the hardware B relative to the molten steel D differs depending on its size, the pushing force is adjusted by the pressure reducing valve 23 to lock the hardware B against the solidified shell E, and the hardware B is held against the solidified shell E. Lock it to the
For a predetermined period of time, in order to prevent the hardware B from floating up on the molten steel, the second lifting cylinder 6 continues to hold it down.

During this time, the slab may continue to be drawn, but the second lifting cylinder 6 is in the middle of its extension and has not reached its stroke end when the hardware B is locked in the solidified shell E. There is no problem because the hardware B can be continued to be held down with a margin while expanding in synchronization with the drawing of the slab.

In this way, the hardware B is thrown into the molten steel E, and when it becomes stable, the clamp operation cylinder 14 of the clamp device 9 is operated by operating the switching valve 27 to release the hardware B, and then By simultaneously operating the cylinders 5 and 6, both the first and second carriages 3 and 4 are pulled up, the base 1 is returned to its standby position, and the work of inserting the hardware B is completed.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, and can be implemented by making various modifications to each part depending on the type of continuous casting equipment.

(Effects) As described above, according to the present invention, when inserting slab connecting hardware into the mold of continuous casting equipment, the hardware is guided from the base until it approaches the molten steel in the mold. The first and second carriages are simultaneously rapidly lowered along the mold, and subsequently, when introducing metal objects into the molten steel in the mold, the second carriage is lowered at a desired speed and is introduced while controlling the pressure. Therefore, the work of inserting hardware can be carried out quickly, reliably and smoothly.

Further, the apparatus of the present invention has the first and second carriages movably arranged up and down on a base that is moved by a moving means to the upper side of the center of the mold,
Since the first and second carriages are configured to feed the hardware into the mold by the simultaneous descending movement of the two carriages and the descending movement of only the second carriage, the metal objects can be placed into the mold from the transporting position. The overall height of the device can be made low, while still providing sufficient lifting and lowering strokes for the injection, which is advantageous from an equipment point of view.
In addition, after loading hardware, both carriages can be pulled up at the same time and quickly returned to their original positions, resulting in excellent operability and improved efficiency.Furthermore, all work is done mechanically, making it possible to avoid high-temperature work environments. It frees up workers and greatly contributes to improving the working environment.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a side view of the device of the present invention, FIG. 2 is a sectional view taken along line a-a in FIG. 4
The figure is a fluid pressure circuit diagram of each cylinder arranged in the device, and FIG. 5 is a graph showing pressure changes when the second lifting cylinder is operated. DESCRIPTION OF SYMBOLS 1... Base, 2... Guide, 3, 4... Carriage, 5... First lifting cylinder, 6... Second lifting cylinder, 7... Projection, 8... Guide, 9
...Clamp device, 10...Clamp stand, 11...
... Vertical part, 12 ... Clamp, 13 ... Hook part, 14 ... Cylinder for clamp operation, 15 ...
High pressure air supply pipe line, 16... pressure reducing valve, 17... branch pipe line, 18... switching valve, 19... speed controller, 20... branch pipe line, 21... switching valve,
22...speed controller, 23...pressure reducing valve,
24...Speed controller, 25...Pressure switch, 26...Branch pipe line, 27...Switching valve, A
...Mold, B...Hardware, C...Hanging rod, D...
... Molten steel, E... Solidified shell.

Claims (1)

[Scope of Claims] 1. When loading slab connecting hardware etc. into a mold of continuous casting equipment, a base is moved to the upper side of the center of the mold, a carriage is lowered from the base, and the carriage is placed in the mold. The hardware clamped by the installed clamping device was placed into the molten steel in the mold with an appropriate pushing force, and during this charging process, it was detected that the hardware came into contact with the solidified shell of an indefinite height. A method for introducing slab-connected metal fittings, etc. into continuous casting equipment, characterized by continuing to hold down the metal fittings for a predetermined period of time to prevent them from lifting up, and then removing the metal fittings from the clamp and raising the carriage. 2. A base that is moved by a moving means is provided above the center of the mold of the continuous casting equipment, and first and second carriages that move up and down along a guide are arranged on the base. , a carriage elevating means is provided between the first carriage and the base, and between both the first and second carriages, the second carriage is provided with a hardware clamping device, and the first and second A device for introducing metal fittings, etc. for connecting slabs of continuous casting equipment, characterized in that a lifting means provided between both carriages is provided with a detector for detecting the pressure when the metal fittings come into contact with a solidified shell.