JPH046869B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction head that sucks slag on molten metal, and more particularly, to a suction head that sucks slag on molten metal, and more specifically, a suction head that jets and supplies cooling water to a suction slag flow from a suction port, solidifies the suction slag into particles, and collects the molten metal. This invention relates to improvements in suction heads for removing slag.

Conventionally, in the above-mentioned suction head, if a large amount of slag is unexpectedly sucked due to some reason such as the suction head being mistakenly brought too close to the molten slag or due to a difference in the properties of the slag, suction and transfer problems occur due to the generation of a large amount of water vapor. As a result, there was a risk that solidified slag with cooling water adhering to it would fall from the suction port onto the high-temperature molten metal, and there was still room for improvement in terms of safety.

In view of the above-mentioned circumstances, an object of the present invention is to make it possible to reliably prevent solidified slag from falling from the suction port while maintaining high workability during normal operation by rationally improving the suction head. be.

The characteristic configuration of the present invention is that the suction port shield is rotatably attached to the suction head main body between an active position below the suction port and a non-active position rotated upward from there;
The area of the surface of the rotation shaft side of the suction port shielding body is larger than the opening area of the suction port,
Its action and effect are as follows.

In other words, when a large amount of slag is accidentally sucked in for some reason as mentioned above, by urgently rotating the suction port shield and shielding the suction port, it is possible to ensure that solidified slag does not fall onto the molten metal. This has made it possible to prevent accidents caused by the adhering cooling water entering the high-temperature molten metal along with the falling slag.

Next, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

It is supported by a drive link mechanism 1 so as to be able to move vertically and horizontally, and is connected to an intake device via a suction pipe and a solidified slag separator, etc. The suction head 2 for suctioning and removing the slag 5 floating in the water is constructed by two upper and lower annular nozzles 9a and 9b connected to an external piping 6 for supplying cooling water via an internal water supply channel 7 and an annular flow path 8. Provided in the suction head inner cylinder 11 near the suction port 10,
Cooling water W is jetted and supplied from the entire circumference of the slag flow S sucked together with air A from 0 to solidify the sucked slag into particles, and the solidified slag is vacuum-transferred together with the sucked air and cooling water. It has been done.

Outside the suction head, in the outer cylinder 12,
The two first and second electrode rods 13 and 14 are arranged such that the first electrode rod 13 is fixed and the second electrode rod 14 is fixed.
is mounted so that it can be freely moved in and out downward by a pneumatic cylinder 15, and the protruding electric two-electrode rod 14 comes into contact with the molten metal slag 5 as the suction head descends. It is detected that the suction height H has been reached, and based on the detection result, the suction head is automatically stopped from lowering, and the second electrode rod 14 is automatically raised and retired to protect it. The second electrode rod 14 is automatically extended to detect the slag level, and the suction head is accordingly automatically lowered to maintain a steady state of suction.

In addition, the first electrode rod 13 is attached so that the downward protrusion length h with respect to the suction port 10 is smaller than the protrusion length H of the second electrode rod 14 in the protruding state. The first electrode rod 13 detects that the suction port 10 has come too close to the molten metal slag 5 due to a malfunction in the automatic lowering operation of the suction head, etc.
Based on the detection, the suction head is automatically raised in an emergency manner, and the shield 16 for the suction port 10 is urgently rotated by the pneumatic cylinder 18, thereby sucking new slag and removing unexpected molten metal. In addition to preventing suction, the slag that has been excessively suctioned due to the excessive proximity of the suction port 10 is accompanied by suction and transfer troubles due to the generation of a large amount of water vapor due to the excessive suction.
It is configured to prevent the solidified cooling water adhering from falling onto the molten metal 4 from the suction port 10, and to prevent accidents caused by water entering the high-temperature molten metal 4.

The shield 16 is connected to the suction head main body 2a.
is rotatably connected to the shield body 16 via a rotation shaft 17 provided in a direction intersecting the central axis P, and the surface 16a of the shield 16 on the rotation shaft 17 side is connected to the rotation shaft 17. The center is a cylindrical surface, and its area is larger than the opening area of the suction port 10, and in a shielded state in which the shield 16 is located below the suction port 10, the surface 16a on the rotating shaft 17 side and the suction head It is arranged so that a gap L (at least about 3 mm) is formed between it and the tip to allow air to be sucked.

The piston rod 18a of the pneumatic cylinder 18, which is attached to the upper end of the suction head outer cylinder 12 so as to be flexibly swingable, and the shield 16 are interlocked and connected by a push-pull rod 19, and the shield 16 is The shield 16 is compactly moved to the non-working position by making the rotation space as small as possible so that it can be rotated between the non-working position located on the side and the working position located below the suction port 10. The housing shield 16 is configured so that it does not interfere with movement of the suction head or visual confirmation of the suction port during normal operations.

The push/pull rod 19 is formed into a pipe shape, and an external cooling air supply pipe 20 is connected to the upper end thereof, and an exhaust pipe 21 is provided at the lower end of the rod 19, and the molten metal slag 5 is cooled by the cooling air discharged from the exhaust pipe 21. Or, connect it with the outlet facing upward to prevent it from scattering, and then connect the shield 1.
The cooling air flow a inside the rod 19 prevents thermal deformation of the rod 19, which may cause malfunction of the rod 6.

Furthermore, the outer periphery of the rod 19 is covered with a heat insulating material 22 such as asbestos material or ceramic material over its entire length,
This further ensures that the rod 19 is prevented from being deformed by heat.

In addition, in configuring the rotational drive structure of the shielding body 16,
As shown in FIG. 4, the shield 16 is configured to rotate by a single-acting cylinder 18 and a return spring 23, or as shown in FIG.
A pair of divided portions 16b, 1 constituting the shield 16
Various improvements can be made to the specific drive device and its interlocking structure, such as interlocking and connecting the cylinder 6b and the cylinder 18 via the wire 24.

Further, as shown in FIG. 5, the number of components of the shielding body 16 can be changed as appropriate, such as by configuring the shielding body 16 from two divided shielding bodies 16b that rotate symmetrically.

Furthermore, instead of operating the shield 16 based on the detection of the slag level of the suction port 10 by various types of sensors such as the electrode rod 13 or optical sensor, it is possible to detect an abnormal change in the degree of vacuum in the suction head 2 or the suction pipe. Various improvements can be made to the specific operation control form of the shield 16, such as operating the shield 16 based on the above.

The suction head according to the present invention is mainly used to remove slag from molten metal in a ladle or torpedo car, but it can also be used to remove slag from molten metal or non-metal in various other processes.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the suction head for removing molten metal slag according to the present invention, and FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a partially cutaway sectional view, and FIG.
FIG. 5 and FIG. 5 are diagrams showing different embodiments, respectively. 2... Suction head, 2a... Suction head body, 4... Molten metal, 5... Slag, 10...
... Suction port, 16... Suction port shield, 16a... Surface on the rotating shaft side of the shield, 17... Rotating shaft.

Claims (1)

[Claims] 1 A suction head that sucks the slag 5 on the molten metal 4, in which the suction port shield 16 is rotatably pivoted to the suction head main body 2a between an active position below the suction port 10 and a non-active position rotated upward from there. The surface 1 of the suction port shield 16 on the rotation shaft 17 side
A suction head for removing molten metal slag, in which the area of the suction head 6a is larger than the opening area of the suction port 10.