JPH045996Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a suction head for removing molten metal slag that is equipped with a gate that shuts off the slag suction port in an emergency. When a large amount of water vapor is suddenly generated in the suction head due to molten metal being accidentally sucked into the suction head that is spouting water, or when spouted cooling water unexpectedly drips onto the molten metal in the ladle. When a large amount of steam is suddenly generated on the ladle side, the reaction wind blowing out from the suction port due to the sudden generation of steam inside the suction head, or the reaction from the sudden generation of steam on the ladle side, can cause the inside of the ladle to The suction port is blocked by the gate to prevent a large amount of molten metal from being sucked into the suction head due to turbulence of the molten metal, thereby preventing the sudden generation of a large amount of steam from expanding and continuing. This invention relates to a suction head for removing molten metal slag that avoids this problem.

[Conventional technology]

Conventionally, in order to automatically operate the suction port cutoff gate in the suction head, a sensor is provided to detect abnormal atmospheric pressure near the suction port.
The gate closing device was activated based on the electrical signal from the sensor. (See patent application No. 58-183934).

[Problem that the invention attempts to solve]

However, automatic operation configurations that use electrical signals inherently have problems in terms of durability and are prone to electrical troubles, which can lead to gates not working, malfunctioning, or malfunctioning due to electrical troubles. There was still room for improvement in terms of safety.

The purpose of the present invention is to ensure automatic closing of the gate in an emergency through reasonable improvements.

[Means for solving problems]

The characteristic configuration of the suction head for removing molten metal slag according to the present invention is that it is equipped with a mechanism that mechanically holds the gate for blocking the slag suction port in the open position against the closing force against it, and receives wind pressure higher than the set value. A wind pressure receiving member that is displaced by the wind pressure is provided with its pressure receiving surface facing outside the suction port and near the suction port, and the holding mechanism is switched to a non-operating state as the wind pressure receiving member is displaced by the wind pressure. A mechanical interlocking mechanism that links the wind pressure receiving member and the holding mechanism is provided, and its functions and effects are as follows.

[Effect]

In other words, when a large amount of water vapor is suddenly generated due to a molten metal suction port or cooling water dripping, etc., the wind pressure receiving member is displaced by the wind pressure of the reaction wind caused by the sudden generation, and the pressure receiving member and mechanical The mechanical holding mechanism linked to the gate is switched to a non-operating state, whereby the gate is automatically closed and operated by the biasing force.

[Effect of idea]

That is, since the entire gate automatic closing operation is performed by mechanical linkage using wind pressure, it has excellent durability and fewer operational troubles than the conventional electric automatic operation configuration.

Therefore, the automatic closing operation of the gate in an emergency can be ensured, and as a result,
We were able to greatly improve safety.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 4 shows the overall structure of the suction head 2 that suctions and removes the slab S floating on the molten metal L in the ladle 1. 6
It is connected to.

Reference numeral 7 denotes an arm for raising and lowering the suction head 2. Based on information from a slag surface detection sensor 8 attached to the suction head 2, the suction head is controlled to lower so as to maintain an appropriate height relative to the slag surface.

A cooling water spouting nozzle is provided inside the suction head, and the suction slag from the suction port 9 is cooled and solidified into fine particles by jetting cooling water, and the fine solidified slag is used as excess cooling water and the waste generated due to cooling. It is configured to be suction-transported together with water vapor in a three-phase mixed state.

As shown in FIGS. 1 to 3, a gate 10 for blocking the suction port 9 is attached to the tip of the suction head so as to be able to swing around a horizontal axis P1 so that the gate ₁₀ closes due to the swing of its own weight. In each of the arm parts 10A of the gate 10, which is composed of a pair of swing arm parts 10A and a curved plate-shaped blocking part 10B extending between the arm parts 10A, a bracket 11 and an arm part are connected and fixed to the suction head main body side. 10A, the gate 10 is held in the open position by the engaging action of the shear pins 12.

In addition, a wind pressure receiving plate 13 is installed at the tip of the suction head.
The gate 10 is arranged such that its pressure receiving surface 13a faces outside the suction port 9 and near the suction port 9.
At the same time, a pair of intermediate swing members 17, which are swingable around a horizontal axis _P2 parallel to the swing axis _P1 , are attached to the wind pressure receiving plate ₁₃ . Locking interlocking structure 18 consisting of a long hole 18a provided in the swinging member 17 and a locking pin 18b provided in the mounting plate 13b of the wind pressure receiving plate 13 for the elongated hole 18a.
The hooks 14, which are interlocked and connected via the intermediate swinging members 17 and pivotally connected to the intermediate swinging members 17, are individually locked to the pair of shear pins 12.

That is, at the initial stage of the upward swinging process of the pressure receiving plate 13 due to the wind pressure, the pressure receiving plate 13 is allowed to freely rise and swing independently by the accommodating action of the elongated hole 18a and the locking pin 18b in the locking interlocking structure 18, and ,
When the elongated hole 18a and the locking pin 18b are engaged in the upward swinging direction of the pressure receiving plate 13, the dynamic inertia of the pressure receiving plate 13 due to the independent free upward swinging is transferred to the hook 14.
The structure is such that an impact is applied to the shear pin 12 through the opening, causing the shear pin 12 to break, thereby closing the gate 10.

A stopper 16 that comes into contact with the horizontal pivot pin 15 connecting the intermediate swinging member 17 and one hook 14 is connected and fixed to the suction head main body side, and the action of the stopper 16 causes the wind pressure receiving plate 13 to The pressure receiving plate 13 is configured to be held in the set pressure receiving posture in a state in which downward swinging of its own weight is restricted to a set phase.

In short, when a large amount of water vapor is suddenly generated due to suction of molten metal into the suction head 2 or cooling water dripping onto the molten metal in the ladle, the wind pressure of the reaction wind accompanying the sudden generation causes the wind pressure receiving plate 13 to The gate 10 is closed by upwardly swinging the molten metal, and the molten metal surface in the ladle is disturbed by the reaction caused by the sudden generation of water vapor, causing a large amount of molten metal to flow into the suction head 2. Designed to prevent inhalation.

[Another example]

Another embodiment of the present invention will be described below.

The specific shapes and structures of the wind pressure receiving member 13, which is displaced by receiving wind pressure exceeding a set value, and the gate 10, which blocks the suction port 9, can be modified in various ways, and their operation forms can also be varied. Various forms such as movement, sliding, or rotation can be applied.

As shown in FIG. 5 as an example of a cooperative structure between the wind pressure receiving member 13 and the gate 10, the wind pressure receiving member 1
3 and the gate 10 are attached to the tip of the suction head so that they swing around the common swing axis _P3 , and the gate 10 is in the open position and the wind pressure receiving member 13 is in the set pressure receiving position. A holding mechanism 1 such as a friction type that holds both the gates 10 and 13 in position against the weight of the gate 10 only in the swing phase.
2 is attached to the swing shaft, and then the holding mechanism 12 releases the holding mechanism 12 for the gate 10 and the pressure member 13 by upward swinging of the pressure receiving member 13 due to wind pressure, and the gate 10 is closed by swinging under its own weight. The mechanism 12 for mechanically holding the gate 10 in the open position may include various types of holding structures, such as locking holding using a sear pin, friction holding, row-point type holding, etc. can be applied.

Further, various improvements can be made to the specific structure of the interlocking mechanism that mechanically interlocks the pressure receiving member 13 and the holding mechanism 12 so that the holding mechanism 12 is switched to a non-operating state by the displacement movement of the pressure receiving member 13 due to wind pressure.

Instead of employing the self-weight biasing configuration as described above, the closing biasing structure of the gate 10 may be an elastic biasing configuration using a spring, a gravity biasing configuration using a separate weight, or a fluid pressure biasing configuration using compressed fluid. Various biasing configurations can be applied.

When arranging the pressure receiving surface 13a of the wind pressure receiving member 13 so as to face it near the suction port 9 on the outside of the suction port 9, the specific posture of the pressure receiving surface 13a and,
The surface shape and area can be changed and improved as appropriate.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention,
FIG. 1 is an enlarged front view of a main part, FIG. 2 is an enlarged partially broken side view of the same, FIG. 3 is a sectional view taken along the line -- in FIG. 1, and FIG. 4 is a general schematic diagram. FIG. 5 is an enlarged front view showing another embodiment of the present invention. 9... Suction port, 10... Gate, 12... Holding mechanism, 13... Wind pressure receiving member, 13a... Pressure receiving surface.

Claims (1)

[Scope of utility model registration request] A gate 10 that blocks the slag suction port 9 in an emergency
The suction head for removing molten metal slag is provided with a mechanism 12 that mechanically holds the gate 10 in an open position against the closing biasing force, and is displaced by receiving a wind pressure higher than a set value. The wind pressure receiving member 13 is connected to its pressure receiving surface 13a.
is provided on the outside of the suction port 9 facing near the suction port 9, and the wind pressure receiving member 13 and the holding mechanism are arranged so as to switch the holding mechanism 12 to a non-operating state as the wind pressure receiving member 13 is displaced by wind pressure. Mechanism 1
A suction head for removing molten metal slag equipped with a mechanical interlocking mechanism that connects the two.