JPS62238044A - Slag surface detector - Google Patents

Abstract

PURPOSE:To improve the accuracy of detection and to reduce the size of a device by constituting a suction head of inside and outside double pipes formed with a cooling water passage in the middle and further disposing a probe for detecting slag to the space in the cooling water passage. CONSTITUTION:The suction head 4 is constituted of a bottom end mouthpiece 9 forming a suction port 8 and the double pipes provided with the inside pipe 11 and the outside pipe 13 forming the cooling water passage 12 with the inside pipe 11. A tubular body 15 which shuts off the cooling water is provided to the lower part of the cooling water passage 12 and a housing space 17 is formed to an insulating pipe 16 on the inside thereof to accommodate the probe 21. The probe 21 is moved into and out below the head 4 to detect the surface of slag 3 by the above-mentioned mechanism. Since the probe 21 is disposed in the space 17 in the cooling water passage 12, the size of the device is reduced. The probe 21 has a good cooling characteristic and therefore, the level detecting accuracy of the slag 3 is improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a slag surface detection device.

Conventional technology As a device for removing slag floating on the surface of molten metal, a suction head whose lower end suction port is located close to the top of the slag is connected to a vacuum suction device, and the slag sucked by this suction head is cooled. Some become trapped and separate from the suction air stream.

In such a device, in order to suction the slag well, it is necessary to arrange the suction head at a predetermined position above the slag.

For this reason, conventionally, for example,
As shown in the above publication, a probe for detecting the slag surface is usually attached to the side of the suction head.

Problems to be Solved by the Invention However, when the probe is attached to the side of the suction head in this way, the probe detects the slag surface at a position far from the suction port of the suction head. There are problems in that it is difficult to accurately detect the slag surface level and the area around the suction head becomes large.

Furthermore, since the probe directly receives radiant heat from the molten metal, there is also the problem that its cooling performance is poor.

SUMMARY OF THE INVENTION Therefore, the present invention solves these problems, enables accurate detection of the level of the slag surface, prevents the area around the slag head from increasing in size, and allows the probe to be cooled well. With the goal.

Means for Solving the Problems In order to solve the above problems, the present invention provides a suction head whose lower end suction port is located close to above the slag floating on the surface of the molten metal and is capable of suctioning and removing the slag. It is composed of a double tube having an inner tube capable of forming a suction path and an outer tube capable of forming a cooling water passage between the inner tube. A housing space is formed in the direction of the suction head, and a bubble that protrudes from the lower end surface of the suction head and is capable of detecting slag is housed in this housing space.

With this configuration, the probe can be placed very close to the suction port of the suction head, which not only makes it possible to accurately detect the level of the slag surface at this suction port, but also allows the probe to be placed very close to the suction port of the suction head. Since the suction head is built into the probe, the suction head does not become large, and since the probe is disposed within the cooling water channel, it is well cooled by the cooling water.

Embodiment FIG. 3 shows an overall view of a slag removal device. Here, 1 is a ladle filled with molten metal 2, and slag 3 is floating on the surface of the molten metal 2. Reference numeral 4 denotes a suction head for sucking the slag 3, which is attached to the free end of the pantograph mechanism 5, and is moved horizontally along the surface of the molten metal 2 by the bending and stretching action of the pantograph mechanism 5. It is configured to be raised and lowered in the vertical direction depending on the level.

A suction pipe 6 is connected to the suction head 4, and the suction pipe 6 is configured to be able to expand and contract in response to vertical and horizontal movement of the suction head 4 based on the bending and stretching of the pantograph n445. . The suction pipe 6 is connected to a separation device 7, and the separation device 7 is connected to a vacuum suction unit (not shown) and is capable of separating the slag 3 that has been sucked and solidified by cooling from the suction airflow. There is.

FIG. 1 shows a detailed cross section of the Zakujo head 4. As shown in FIG. As shown in the figure, the suction head 4 includes a lower end cap 9 forming the suction port 8, an inner pipe 11 forming the suction path 10 for the slag 3, and a cooling water passage 12 between the inner pipe 111 and the lower end cap 9 forming the suction port 8.
outside to form? ! It is composed of a double pipe with 13. The nozzle 9 is formed with a nozzle 14 that can inject cold fJ1 water from the cooling water passage 12.
The slag 3 sucked into the suction head 4 is cooled and solidified by the cooling water from the suction head 4. Note that in the upper part of the suction head 4, since a very large cooling performance is not required, the outer tube 13 is provided near the inner tube 11, and the cooling water passage 12 is configured to be narrow.

In the cooling water passage 12 at the lower part of the suction head 4, there is a suction head 4 that runs longitudinally through the cooling water passage 12.
A tube body 15 is provided in the axial direction of the tube body 15.
Cooling water is prevented from entering inside. An insulating tube 16 having electrical insulation properties is passed through the tube body 15, and a housing space 17 is formed inside the insulating tube 16. An insulator case 19 having a guide hole 18 communicating with the housing space 17 is attached to the lower end cap 9, and an insulator 20 connected to the insulating tube 16 is held by the insulator case 19.

A rod-shaped probe 21 is housed inside the closed-R tube 16 . The probe 21 is made of a stainless steel tube constituting an electrode, and is movable in the axial direction inside the absolute tube 16, passing through the insulator 20 and the insulator rose 19.
It is adapted to protrude from the lower end surface 22 of the suction head 4. For this reason, the inner surface 23 of the insulator 20 is formed into a tapered shape that can guide the tip of the probe 21.

A guide ring 24 for freely supporting the probe 21 is disposed in the insulating tube 1G, and a current collecting brush 25 that contacts the probe 21 is provided on the guide ring 24.

The upper end of the probe 21 is connected to a wire 27 via an insulating bushing 26. This wire 27 is connected to the insulation tube 1
6 , and this projecting portion is arranged along the outside of the outer tube 13 . 28 is an inner flexible tube that covers the wire 27, and 29 is an outer flexible tube that further covers the inner flexible tube 28.

As shown in Figure 3, both flexible tubes 28.2
The wire 27 covered with 9 is guided above the suction head 4 and connected 8 to a cylinder Vt[31 attached to the arm 30 of the pantograph I14'15.

FIG. 2 shows the cylinder device 31 and its surroundings in detail. Here, 32 is a board attached to the arm 30, and the cylinder device 31 and the rod casing 3 are attached to this board 32.
3 are installed. 34 is a working rod of the cylinder device 31, the tip of which is connected to #2 by the rod casing 33! Supported for free movement. Rod casing 3
3 are connected to both flexible tubes 28 and 29, and Y1' 727 protrudes from the flexible tube 28, passes through the inside of the casing 33, and is connected to the working rod 34. 35 is a stopper shell for fixing the wire 27 to the working rod 34.

A signal cable 36 is guided to the brush 25 through the inside of the outer flexible tube 29.

In such a configuration, when the cylinder device 31 is expanded or contracted, the probe 21 is moved in the axial direction via the wire 27, and the probe 21 moves downwardly through the guide hole 18 and withdraws from the suction head 4, and protrudes. The surface of the slag 3 is detected by touching the slag 3. The detection signal is sent to a control device (not shown) via the signal cable 36, and the control device operates the pantograph 114115.
Set Naximin Head 4 to the appropriate roar. By repeatedly expanding and contracting the cylinder device 31 and causing the probe 21 to repeatedly protrude from the suction head 4 at regular intervals, the position of the surface of the slug 3 can be detected from time to time.
will be done.

As described above, according to the present invention, by arranging the probe 21 near the suction port 8, the level of the surface of the slag 3 at the position of the suction port 8 can be accurately detected.

Further, since the probe 21 is built into the suction head 4, the device can be made smaller compared to a conventional device in which the probe is provided on the side of the suction head. Furthermore, probe 21. is housed in the cooling water passage 12, so it can be cooled well. Further, as described above, since the wire 27 is arranged in the flexible tubes 28 and 29, it is possible to easily follow the operation of the pantograph mechanism 5.

Effects of the Invention As described above, according to the present invention, not only can the level of the slag surface at the suction port be accurately detected using the probe, but the device does not need to be large-sized, and the probe can be mounted sufficiently. can be cooled to

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention, FIG. 2 is a detailed view of a probe driving device, and FIG. 3 is an overall view of a slag removal device using the device of the present invention.

Claims (1)

[Claims] 1. A suction head whose lower end suction port is located close to above the slag floating on the surface of the molten metal and is capable of suctioning and removing the slag, an inner pipe capable of forming a suction path for the slag, and Consisting of a double pipe having an outer pipe capable of forming a cooling water passage between the inner pipe and an outer pipe, an accommodation space in the axial direction of the suction head is formed in the cooling water passage, and this accommodation space A slag surface detection device, further comprising a probe that protrudes from the lower end surface of the suction head and is capable of detecting slag.