JPS62222009A - Method and device for centering to mount siphon type converter tap hole to furnace body - Google Patents

Abstract

PURPOSE:To make a centering operation by a remote control in a short period by projecting light from a position of a prescribed distance from the center of a converter tap hole toward a furnace body and making the irradiation point coincident with the position on the furnace body apart at the same distance as the above-mentioned distance from the center of a tap hole mounting part. CONSTITUTION:A siphon type converter tap hole mounting device 6 carrying the siphon type converter tap hole 1 on a lifting frame 16 is carried to the underside of the converter 2. Laser light or the like is projected from a light emitting source 21 in the position existing at the prescribed distance l1 from he center of the converter tap hole 1 toward a light receiving part 22 of the furnace body 3. The irradiation point thereof is made coincident with the target position in the light receiving part 22 on the furnace body 3 apart at the same distance a the above-mentioned distance l1 from the center of the tap hole mounting part 4. Such operation is made by subjecting the lower carriage 8 and upper carriage 9 of a means 14 for moving the siphon type converter gap hole to extension and contraction motions, etc. The centering of the converter tap hole 1 and the tap hole mounting part 4 on the furnace body 3 side is executed with good accuracy by the above-mentioned method.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a centering method and device for attaching a furnace body to a siphon type converter tapping port. It is used in the field of centering work performed when attaching a siphon-type converter tap to the tap opening attachment part of the converter.

[Prior art and its problems]

Molten slag floats on the free surface of the molten metal or alloy in the converter. When the converter is tilted and molten metal is taken out from the tapping port, slag also tends to flow out at the same time, especially in the final stage of tapping. It is undesirable for slag to get mixed into the molten metal, and attempts have been made to extract only the molten metal.

To achieve this, there is a separate hot water tapping device described in Japanese Patent Publication No. 56-54366. This method adopts the siphon tapping method, in which a tapping path is provided that curves in a plane that intersects a horizontal plane in the tapping position, and the static pressure of the remaining metal after the flow of molten metal taken out from the tapping path causes the molten metal to This counterbalances the static pressure of the molten slag that follows the flow and prevents the slag from flowing out.

The above-mentioned winding tap passage is a siphon-type converter tap, and this tap is attached to a tap mounting portion of the converter. A siphon-type converter tapping port has a refractory material attached to the inside of the outer shell, and as molten metal passes through the refractory material, the refractory material wears out, so it is often attached to the furnace body to repair it. requires removal work. The area near the tapping port of a converter undergoes changes over time as it is subjected to heat load from molten metal. The situation is the same even at the repaired siphon converter tapping port, and it is inevitable that the dimensions of the two will be inconsistent. Further, although the converter main body can be rotated 360 degrees in forward and reverse directions by a converter tilting device, the stopping position at the center of the attachment part of the steel tapping port on the side of the furnace body causes a slight error every time depending on the stopping accuracy. Therefore, when attaching the siphon-type converter tap to the tap attachment portion of the converter, it is necessary to align the centers of the two each time. Moreover, it is necessary to install and remove the siphon-type converter tapping port within a limited period of time between converter operations, and it is desirable that the work be both accurate and quick.

Incidentally, the work of removing and attaching the siphon type converter tapping port from the converter is performed as follows. The converter 2, which is in the vertical position shown by the broken line in FIG. Come to position. A sling supports the Misaiphon type converter tap 1 by means of a raw material charging crane 30 which is installed to charge raw materials into the converter. Flange portion 4a of tapping port attachment portion 4 and flange portion 1a of siphon type converter tapping port 1
Several fastening members such as bolts or bolts that are fastened and fixed are fused with a gas torch or the like, and the siphon converter tapping port 1 is separated from the furnace body 3 and carried away by a crane 30.

The same crane 30 carries in another siphon converter tap 1 that has been repaired, and attaches it to the unillustrated guide rail near the tap attachment part 4 of the converter 2 to the siphon converter tap 1. The provided V rollers are engaged to center the siphon type converter tapping port l and the tapping port attachment portion 4 of the converter 2. Meanwhile, the siphon type converter tap port 1 is loaded with the raw material charging crane 3.
0, and the crane operator moves the crane 30 based on a signal from the rigger to align the siphon converter tapping port l with the tapping port mounting portion 4.

Such work involves various problems such as the following.

(1) Since a material charging crane is used, the material charging cycle of other converters in the same building is affected. Furthermore, the timing of installing the siphon-type converter tapping port may be disrupted. Therefore, the overall operating rate in the converter factory decreases.

(2) Crane operators, who are responsible for transporting extremely heavy objects such as raw material chutes, will perform centering with an extremely high precision of ±20+wo+ from a distance using the naked eye and signals from the riggers. Moreover, although it is necessary to complete centering within a short time due to the operation cycle, the work time may vary depending on the skill level of the operator.
Moreover, time overruns may occur.

(3) Centering work requires at least one crane operator and one sling worker, and much of the work relies on manual labor.

(4) Rigging workers will be exposed to the high temperatures of the furnace body on the work floor in front of the furnace, and will be required to work in areas where there is a possibility of falling metal.

[Purpose of the invention]

The present invention was made in order to solve the above-mentioned problems, and its purpose is to install the siphon-type converter tap at the right time without affecting the operation of other attached converters. The furnace body of the siphon-type converter tapping port allows one operator to perform centering work in a short time by remote control from a location with good working conditions without being affected by the operation of other converters. An object of the present invention is to provide a centering method for mounting and a device thereof.

[Structure of the invention]

The feature of the centering method for attaching the siphon converter tap of the present invention to the furnace body is that the siphon converter tap attachment device is carried under the converter, and the siphon converter tap is attached to the furnace body. When installing,
Light is emitted toward the furnace body from a light emitting source installed at a predetermined distance from the center of the siphon converter tap, which is mounted on the siphon converter tap mounting device, and the light is emitted from the irradiation point. The centering of the siphon converter tapping port and the tapping port mounting portion on the furnace body side is achieved by matching the position on the furnace body at the same distance as the above-mentioned predetermined distance from the center of the steel port mounting portion. That's true.

The features of the second invention, a centering device for attaching a furnace body to a siphon-type converter tap, are as follows with reference to FIG. On the siphon type converter tap attachment device 6 which attaches the siphon type converter tap port 1 to the furnace body 3 from below the converter 2,
A light emitting source 21 is installed at a position a predetermined distance away from the center of the siphon converter tapping port 1, and a light emitting source 21 is installed on the furnace body 3 corresponding to the predetermined distance from the center of the tapping port mounting portion 4 provided on the furnace body 3. A light receiving part 22 is disposed at a position, and a siphon converter tap moving means 14 for aligning the center of the siphon converter tap l with the center of the tap attachment part 4 moves the siphon converter tap l to the center of the siphon tap. It is provided in the mouth attachment device 6.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof.

Figure 1 is an overall working diagram including a device for centering work required when attaching the siphon-type converter tap 1 to the furnace body 3 of the converter 2, and the converter 2 is in a tilted state. It is in the position shown by the imaginary line in Fig. 5, and the tapping port attachment part 4 is directed directly downward, and the flange part 4a that contacts the siphon type converter tapping port 1 is stopped in a horizontal position. ing. A steel receiving truck 5 is normally able to travel below the converter 2, and a siphon type converter tap attachment device 6 is carried under the furnace body 3 by being mounted thereon.

The siphon type converter steel tapping port attachment device 6 has a steel receiving cart 5.
A lower truck 8 and an upper truck 9 are installed, which move back and forth and left and right on a fixed frame 7 that is mounted on the vehicle. In this example, the lower truck 8 can move in the front-back direction that coincides with the traveling direction of the steel receiving truck 5, and the amount of movement is within a range that can compensate for misalignment due to the stopping accuracy of the steel receiving truck 5. . The upper cart 9 can move in the left and right directions as shown in FIG. This is a range that can compensate for misalignment when mounting the tapping port attachment device 6 on board. Therefore, rollers 10 and 11 are attached to each of the carts 8 and 9, and liners 12 and 13 are stretched over the upper surfaces of the fixed frame 7 and the lower cart 8, and each is independently powered by a drive source (not shown). It is supposed to move. These structures form a siphon type converter tap moving means 14 that aligns the center of the siphon converter tap 1 with the center of the tap attachment part 4 .

There is a support frame 15 having a vertical column on top of the upper truck 9, and an elevating frame 16 is configured to move up and down with the siphon converter tap 1 mounted thereon. The siphon type converter tap 1 is mounted on the lifting frame 16 so that the flange portion 1a in contact with the tap attachment part 4 faces horizontally upward, and the siphon type converter tap 1 is The center of the flange portion 1a is the upper truck 9
Care has been taken to ensure that the position is always constant.

Such a siphon type converter tap mounting device 6 has a predetermined distance ρ1. A light emitting source-21 is installed at a position i2. The light emitting source 21 emits a parallel light beam such as a laser beam, and the light is directed against the center trajectory of the siphon converter tap 1 moving within the support frame 15. The posture is maintained so that they are parallel. On the other hand, the light receiving section 22 is arranged on the furnace body 3 at a position that is the same distance as the predetermined distance β1.12 from the center of the tapping port attachment portion 4 provided on the furnace body 3 of the converter 2. In the illustrated example, the light receiving section 22 is attached to the end surface of the lower support ring 24 that supports the trunnion shaft 23, where there is almost no relative positional deviation with the tapping port attachment section 4. As an example, the light receiving section 22 has marks that intersect at right angles as shown in FIG. It has become.

An industrial television camera 25 for checking the receiving position of parallel light beams such as laser beams in the light receiving section 22 is installed on the same support member 26 of the upper truck 9 as the light emitting source 21. The video taken by this camera can be viewed in the operation room, and after one operator controls the movement of the steel receiving truck 5, the lower truck 8 and the upper truck of the siphon converter tapping port attachment device 6 are shown. 9 until the target location of the light receiving section 22 shown on the television screen is irradiated with a parallel beam of light such as a laser beam emitted from the light emitting source 21. The movement operation can be continued.

According to the centering device having such a configuration, it is possible to center the siphon type converter tapping port 1, which is a heavy object, and the tapping port attachment portion 4 of the converter 2 as follows. .

At the standby place, the siphon converter tap 1 is mounted on the lifting frame 16, and the siphon converter tap attachment device 6 is carried into the bottom of the converter 2 using the steel receiving cart 5. At this time, the siphon type converter tap l is maintained in such a position that the flange portion 1a is directly above it. When the steel receiving cart 5 stops at a predetermined position below the furnace body 3, the siphon converter tap 1 opens.
A parallel light beam such as a laser beam is emitted from a light emitting source 21 located at a predetermined plane R1t and 12 in a horizontal plane from the center of the furnace body 3.
The light is projected toward the light receiving section 22 of. Industrial TV camera 2
5, the irradiation state is observed, and while viewing from a distance as shown in FIG. 4, the irradiation point is zoomed up as shown in FIG. ff1
2 and the target position on the light receiving section 22 on the furnace body 3, which is the same distance away. This operation is carried out by moving the lower truck 8 and the upper truck 9, which constitute the siphon type converter tap port moving means 14, by the telescopic operation of a hydraulic cylinder or the like.

When centering is completed, the elevating frame 16 is raised and the siphon converter tap 1 held thereon is lifted. Since the center of the flange part 1a of the siphon converter tap 1 and the center of the flange part 4a of the tap tap attachment part 4 of the converter 2 are aligned, all you need to do is raise the siphon converter tap 1. It can be fitted to the tap hole attachment part 4. The two are fastened and fixed using bolts (not shown).
The mounting holes on both flanges are long enough to absorb thermal strain remaining in the steel shell of the converter 2 and the siphon converter tap 1, and are designed to absorb dimensional deviations.

The embodiment described above consists of a light emitting source that emits a parallel light beam such as a laser beam, a light receiving section for the parallel light beam such as a laser beam, and a television device that recognizes the light reception at 1a. By using this, it is also possible to perform centering automatically by providing an arithmetic function using a sensitive signal.

〔Effect of the invention〕

As explained in detail above, the present invention is arranged such that the siphon type converter tap is mounted on the siphon type converter tap mounting device which attaches the siphon type converter tap to the furnace body from the bottom of the converter. A light emitting source is installed at a certain distance, and a light receiving part is placed on the furnace body at a distance equal to the predetermined distance from the center of the tapping port mounting part provided on the furnace body. A siphon type converter tapping port moving means that aligns the center of the steel tap with the center of the tapping port mounting part is installed in the siphon type converter tapping port mounting device, so that the siphon type converter tapping port can be moved from the bottom of the converter. When attaching the spout to the furnace body, light is emitted toward the furnace body from a position a predetermined distance from the center of the siphon converter tapping port, and the irradiation point is set at the predetermined distance from the center of the tap port attachment part of the converter. Same distance! It is possible to align the siphon type converter tapping port with the tapping port mounting portion on the furnace body side by aligning it with the position on the furnace body which is separated by ilt.

Such an operation eliminates the need to use a material charging crane, does not affect the material charging cycles of other furnaces in the same building, and allows for siphon-type converter tapping. Since the timing of installing the port is not affected by the operation of other converters, it is possible to prevent a decrease in the overall operating rate at the converter factory and to shorten the installation time.

In addition, since the amount of misalignment can be detected immediately by emitting light from the light source, operators can complete centering in a short time, avoiding variations in work time due to skill level and time overruns. . Furthermore, it is sufficient for one operator to be present for centering work, and remote control can free up work in areas with poor work environments on the furnace front work floor. In addition, since centering can be performed in a non-contact manner, there are fewer failures (and, since the parallel light beam is parallel to the moving direction of the siphon converter tapping port, it is not affected by the distance between the mounting device and the furnace body. First, a highly reliable mounting device can be obtained.

[Brief explanation of drawings]

Fig. 1 is a front view of a centering device for attaching a furnace body to which the centering method for attaching a furnace body of a siphon type converter tap of the present invention is applied;
The figure is a side view, Figure 3 is an enlarged view of the light-receiving part, as seen on an industrial television, Figure 4 is an image of the light-receiving part viewed from an industrial television camera, and Figure 5 is a siphon-type converter steel extraction. FIG. 2 is a schematic diagram illustrating the conventional installation and removal work of the spout and the tilting posture of the converter according to the present invention. 1-siphon converter tap, 2-converter, 3-furnace body, 4
-・Tapping port attachment part, 6・-Siphon type converter tapping port attachment device, 14-Siphon type converter tapping port moving means, 21-light emitting source, 22-light receiving part, j21. ff12-predetermined distance.

Claims (2)

[Claims] (1) When carrying the siphon type converter tap attachment device under the converter and attaching the siphon type converter tap port to the furnace body, the siphon type installed on the above siphon type converter tap attachment device A light emitting source installed at a predetermined distance from the center of the converter tapping port emits light toward the furnace body, and the irradiation point is set at the same distance as the above-mentioned predetermined distance from the center of the tap port attachment part. A furnace body of a siphon-type converter tap, characterized in that the siphon-type converter tap is aligned with the tap-hole mounting portion on the furnace body side by matching the above positions. Centering method for installation. (2) Attach the siphon converter tap to the furnace body from below the converter. On the siphon converter tap mounting device, a light emitting source is installed at a predetermined distance from the center of the siphon converter tap. and a light receiving part is arranged on the furnace body at a position corresponding to the predetermined distance from the center of the tapping port mounting part provided on the furnace body, and the center of the siphon type converter tapping port is connected to the tapping port mounting part. A core for mounting a furnace body of a siphon-type converter tap, characterized in that a siphon-type converter tap port moving means for aligning the center of the siphon converter tap port is provided in the siphon-type converter tap mounting device. Output device.