JPS6039115A - Automatic holding device for oxygen-blowing pipe of electric furnace - Google Patents

Abstract

PURPOSE:To blow automatically oxygen into an electric furnace without danger in the stage of feeding plural oxygen-blowing pipes to the inside of the electric furnace by attaching the oxygen-blowing pipes to the lifting base and tilting base on a moving carriage. CONSTITUTION:A lifting base 10 which is moved upward and downward along a guide rod 9 by a lifting device 8 is provided on a carriage 1 which can be moved to the side of an electric furnace by wheels 6, 7 in the stage of blowing gaseous oxygen into the molten steel in said furnace and refining the molten steel by decarburization. A base 11 tiltable around a fulcrum 12 is attached on the base 10 and rollers 18 grasping plural pieces of oxygen-blowing pipes are provided on the surface thereof. The carriage 1 is approached to the electric furnace and the base 10 is moved upward and downward according to the height, etc. of the electric furnace. The oxygen-blowing pipes are fed at a required angle into the molten metal in the electric furnace by the tilting of the base 11. The oxygen-blowing pipes which are burned and consumed by oxygen blowing are automatically fed into the furnace by the revolution of the rollers 18. The oxygen-blowing operation is accomplished with a small number of workers without danger.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic holding device for an oxygen blowing pipe that blows into a molten slag in an electric furnace for decarburization.

Oxygen for decarburization is blown into the electric furnace to completely improve the purity of the molten steel. This is normally done by a worker inserting and supporting the oxygen blowing pipe by hand through the inspection work hole of the electric furnace. However, since this blown oxygen pressure is a high pressure of several 6/J or more, flames or molten steel may blow out from the holes, which is dangerous. Furthermore, since two or three or more oxygen injection tubes are usually used, multiple workers are required to work on the original work, and there is a limit to labor saving.

In view of this, the present invention was made to automate the
A liftable platform is installed on a steerable trolley that can be moved to a predetermined position near the electric furnace, and a tilting device is installed on the platform so that the platform can be tilted freely, and oxygen is blown onto the tilting platform. The present invention is characterized in that it is equipped with drive rollers that hold the tube and feed it into the furnace according to the amount of burnout of the blowing tube.

The present invention will be explained below based on illustrated embodiments.

In the figure, 1 is a trolley that can be moved freely using a traveling device 2.
A steering truck 4 is attached to one end of the truck 1 via a shaft 3, and by swinging the handle 5Vc of the steering column *4 to the left or right of the entire shaft 3 of the truck 4, the truck 1 is moved. to accurately move it to a location near the electric furnace. The vehicle 1 is provided with wheels 6 that are driven to travel, and the steering truck is provided with driven wheels 7, respectively. A lifting device 8 is provided in this constitution 1.
The lifting platform 10 that is moved by the guide V is raised and lowered on the cart. This elevating device is shown in the figure as a through-rot V type in which the electric motor completely changes speed, but other types such as a pinion rack type, a hydraulic cylinder type, and a ring type can also be adopted. In addition, a shaft 12 is inserted between the two bearings 10 m and kb between the lifting platform 10, which tilts in the running direction of the trolley, and the tilting platform 11 is shown in FIG. Let it tilt like this.

This tilting can also be performed by a hydraulic cylinder or link provided on the lifting table. In the illustrated embodiment, a screw rod 13 is arranged on the lifting table so as to be freely rotatable in the tilting direction of the table using a tilting motor 14. At the same time, a threaded assembly 16 having a pin 15 protruding from the side is screwed onto the threaded rod 13, and the pin 15 of this threaded assembly is all fitted into an inclined groove 17m of a bracket 17 protruding below the tilting table.
By selectively switching and moving the threaded rod to the left or right, the bottle moves within the inclined groove of the bracket when the threaded assembly moves forward or backward along the threaded rod. The tilting table 11 tilts about the shaft 12f, which is its fulcrum, in response to the bin moving device.

The tilting table 11 has a plurality of parallel oxygen blowing pipes P1. P2
．． A clamping and feeding roller device 18 is provided which can clamp P3 and automatically feed it into the furnace by the length of the tip of which is burnt out by the high heat of the molten steel. In this device, a pair of opposed rollers, which grip one oxygen blowing pipe from both the left and right sides, are disposed at the front and rear ends of a tilting table, respectively. A part 18au of the two rows 918 and 18b facing left and right is rotatably supported at a set position by a bearing 18o provided on a tilting table as shown in Figures 7 and 8. The other roller 18tll14 is driven by a motor 18d either directly or via a gear 18, either continuously or intermittently to feed the oxygen blowing pipe into the furnace, and the other roller 18tll14 is driven by a shaft 18f on a tilting table as shown in FIGS. It is supported so as to freely rotate at the tip of a swinging arm 18g which is pivotally attached to the pipe P, and the pipe P is held between two rollers 18m and 18b with a required pressure.

Then, depending on the diameter of this pipe or the diameter of the pipe joint, the roller I
It moves automatically by the swing of the Qbijyume and always clamps the pipe at the set pressure. Although it is possible to use the swing spring field of this oscillator 5, as shown in the figure, a screw rod 18h is screwed into a part of the oscillator 5, and this screw rod 18h
Rotate it by τ to 1 to make the end arm swing. In addition, a control panel 19 is provided in the steering system for selectively operating a traveling device, a lifting device, a tilting device, a drive device for pipe holding rollers, etc., provided on the truck.

After the cart configured as described above is moved to a desired position in the electric furnace, it is stopped, and the lifting platform is raised and lowered, and the tilting platform is tilted, so that the height and angle are such that it can be easily inserted into the oxygen blowing pipe into the furnace. . This is accomplished by operating a lifting device and a tilting device. Then, insert the oxygen blowing tube so as to sandwich it between the rollers 18m and 18b facing each other on the left and right sides of the front and rear ends of the tilting table, insert the required length into the furnace, and connect the oxygen supply source to the other end of the original tube. In this case, oxygen is automatically blown into the furnace. If the tip of this oxygen blowing tube melts and burns out due to heat or molten steel heat, the roller 1 will only cover the burnt amount.
8a is driven to feed the tube self-sufficiently. The tube holding roller can be driven manually, but in order to be automated, the burnout rate of the tube is determined in advance, and the roller is rotated intermittently in a self-sufficient manner according to the program. O In order to prevent the truck from moving backwards due to the reaction during this oxygen injection, a braking device may be provided on the wheels, or an elevating stay 20 may be provided as shown in the figure.

According to the present invention, the oxygen blowing pipe is held between rollers that move up and down on the traveling truck and tilt, and one of the rollers is rotated as necessary, so that the oxygen blowing pipe is not moved into the electric furnace. The oxygen blowing tube that blows oxygen into the furnace is fully automatic, and is inserted into the furnace at an appropriate angle, and is inserted into the furnace automatically, depending on the amount of burnout, so it is automatically fed into the furnace, so dangerous work can be done mechanically. 1. It has the advantage of being able to be carried out independently.

[Brief explanation of drawings]

Figure 1 is the front M1 whistle 2A is a plan view, Figure 3 is a side view, Figure 4 is a plan view of the roller section, No. 5M is the same side, No. 6 is a sectional view of the driven roller, No. 7 Figure 8 is a longitudinal sectional front view of the drive-side roller, and Figure 8 is a side view of Figure 7. 1106 trolley 201. Traveling device 300. Axis 410. Steering trolley 58. Han V Le 601. Wheel 720. Steering wheel 800. Lifting device 90. , Guy's IQ , Lifting table 11 , Tilting table 12 , Shaft 13 , Screw rod 14 , Tilt motor 15 , Bin 16 , Screw unit 17 , , Galley 1 foot 18, ..., Pinch feed roller device 19, ..., Control panel 20, ..., Stay Pl, P2.P3--Oxygen blowing pipe 3 diagram □

Claims (1)

[Claims] A lift platform is provided on a steerable trolley that can be moved to a predetermined position near the electric furnace so that it can be raised and lowered, and a tilting table is provided so that it can be tilted freely with a tilting device during the raising and lowering, and an oxygen blowing pipe is installed on the tilting table. An automatic holding device for an oxygen blowing tube in an electric furnace, comprising a drive roller that clamps and feeds the blowing tube into the furnace according to the amount of burnout of the blowing tube.