JPS6365732B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic working device for steelmaking, and more specifically, it is used to perform various tasks such as repairing a ladle or blowing oxygen into molten steel in an electric furnace. This invention relates to automatic working equipment for steelmaking.

[Prior art]

Conventionally, for example, a device for blowing oxygen into molten steel in an operating electric furnace for steelmaking is one in which an oxygen lance for blowing oxygen is supported in a fixed position by multiple pinch rollers. There is. A cart capable of feeding and operating the lance by a drive source is parked near the slag discharge port, and the lance can be inserted diagonally from above into the molten steel in the furnace through the slag discharge port. According to such a device, the tip of the lance is always positioned at the appropriate location in the molten steel by appropriately feeding out the lance by the amount of the lance that has been consumed by melting into the molten steel, thereby blowing an effective and appropriate amount of oxygen into the molten steel. be able to.

However, since the feeding device including the cart is bulky and large, it requires a considerable amount of space not only during operation but also when stored. On the other hand, various devices and auxiliary equipment are placed in front of the furnace, and as a result, space is limited.
It is hoped that it will be improved so that it is smaller and less bulky.

In addition, in the above-mentioned feeding device, it is difficult to provide a strong pinching force to the pinch roller, so there is a limit to the angle in which work equipment such as a lance can be fed out. Another problem is that it is not possible to operate the long working equipment in a vertical direction, such as when repairing an inner wall.

[Purpose of the invention]

The present invention solves the above problems, does not require space not only during operation but also during storage, can effectively accommodate the limited space in front of the furnace, is easy to operate, and is versatile in various tasks. The purpose of the present invention is to provide an automatic working device for steel making that has the following features.

[Structure of the invention]

As shown in FIG. 1, the steelmaking automatic working device of the present invention has one ends 1a and 2a of main links 1 and 2 rotatably attached to two different points on a base 6, respectively. The links 1 and 2 form a parallelogram link mechanism, and one ends 3a and 4a of the auxiliary links 3 and 4 held in parallel are rotatable at the other ends 1b and 2b of the main links 1 and 2, respectively. The other ends 3b and 4b of these two auxiliary links 3 and 4 are provided with a mounting member 20a for attaching various working equipment for steelmaking, and one end 3a of one of the auxiliary links 3 and 4 However, the tooth ratio is 1:2
The transmission mechanism 10 is also configured to be connected to a support pin 11 fixed to the base 6 for supporting the main link 1.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof. FIG. 5 is a schematic diagram showing the state of oxygen blowing operation, in which oxygen is blown into molten steel D in an electric furnace A for steelmaking. In this method, a cart C equipped with a device for feeding out the oxygen lance 8 using a parallel link mechanism is stopped in front of the furnace, and the oxygen lance 8 is inserted diagonally from above into the molten steel D through the slag outlet B.

One ends 1a and 2a of the main links 1 and 2 of the same length are connected to the upper end of the base 6, which is erected on the above-mentioned cart C and is rotationally driven by the drive source 7, so as to be rotatable within a vertical plane. and the other end 1b of the main links 1 and 2,
One ends 3a and 4a of auxiliary links 3 and 4 having the same length as these are similarly rotatably connected to 2b in a vertical plane. The four links 1, 2, 3, and 4 each constitute a so-called parallelogram link mechanism, and these two parallelogram link mechanisms are driven by a drive source such as an electric motor disposed at the other end 1b of the main link 1. 5.

An oxygen lance 8 is attached to the other ends 3b, 4b of the auxiliary links 3, 4. Therefore, such a trolley C is stopped near the slag discharge port B, the two parallelogram link mechanisms described above are extended diagonally downward, and the oxygen lance 8 is inserted into the furnace from the slag discharge port B to drain the molten steel. Oxygen can be blown into the molten steel D by arranging the tip at any position in the molten steel D.

In order to make it easier to understand the following explanation of this device, FIGS. 1, 2, and 3a to 3c
In each of the figures, the oxygen lance 8 is particularly shown in a horizontally operated manner.

Figure 1 shows main links 1 and 2 and auxiliary links 3 and 4.
1 is a cross-sectional plan view showing the connecting portion between the main link 1 and the base 6 and the connecting portion between the main links 1 and 2 and the auxiliary links 3 and 4 in a state where the main links 1 and 2 are extended, and one end 1a of the main links 1 and 2 is shown. , 2a are support pins 11, 1 fixed horizontally at two branched locations on the upper end of the base 6.
2, and this support pin 11 has a gear 11a.
is fixed. The gear 11a is a support pin 11
One end 1a of the main link 1 adjacent to and parallel to these
A sprocket 13b is fixed to the planetary pin 13 adjacent to the gear 13a.

Elbow pins 14 and 15 are pivotally supported at the other ends 1b and 2b of the main links 1 and 2.
One end is connected to a drive source 5 disposed at the other end 1b of the main link 1 and driven to rotate, the central part is fixed to one end 3a of the auxiliary link 3, and the outer end is connected to one end of the rod 16. A gear 14a is fixed to a portion that is supported pivotally and further covered by the main link 1.
This gear 14a is connected to a gear pin 17 which is close to the elbow pin 14 and is pivotally supported by the other end 1b of the main link 1.
The sprocket 17 meshes with the gear 17a fixed to the gear 17a at a tooth ratio of 1:2, and the sprocket 17 is adjacent to the gear 17a.
b is fixed to the gear pin 17. This sprocket 17b is connected to the sprocket 13b via a chain 13c at a rotation ratio of 1:1. As described above, the transmission mechanism 10 that connects one end 3a of the auxiliary link 3 and the support pin 11 via the elbow pin 14 is composed of the above-mentioned gear mechanism with a gear ratio of 1:2 and an interlocking mechanism consisting of a sprocket and a chain. It is configured.

Wrist pins 18 and 19 are pivotally supported at the other ends 3b and 4b of the auxiliary links 3 and 4, respectively, and these wrist pins 18 and 19 are fixed to both ends of the rod 20, respectively. Refer to FIG. 5] is provided with a mounting member 20a for mounting.

With the main links 1, 2 and the auxiliary links 3, 4 extended as shown in FIGS.
When rotated by angle θ in direction b, elbow pin 1
The auxiliary link 3 having one end 3a fixed to the main link 1 rotates by an angle θ in the direction of the arrow 33 in FIG. 2 with respect to the main link 1 about the elbow pin 14 as the rotation center. On the other hand, as described above, the elbow pin 14 is connected to the support pin 11 via the transmission mechanism 10 with a tooth ratio of 1:2, and since the support pin 11 is fixed to the base 6, the gear 13a is It revolves around the gear 11a by an angle of 1/2θ while rotating in the direction 13d.
Therefore, the main link 1 is configured to rotate by an angle 1/2θ in the direction of arrow 31 in FIG. 2 with the support pin 11 as the center of rotation.

Note that the drive source 5 that operates the transmission mechanism 10 is
Alternatively, the planetary pin 13 or gear pin 17 described above may be driven. Furthermore, if a mechanism using bevel gears or the like is used instead of the interlocking mechanism consisting of the sprocket and chain, the occurrence of play in movement can be reduced.

In such a main link 1 and auxiliary link 3, if the initial state is set so that the wrist pin 18 and the support pin 11, which are pivotally supported by the other end 3b of the auxiliary link 3, are located at the same level, the driving source When both links 1 and 3 are rotated by 5, both links 1 and 3
The triangle formed by this and the horizontal line that intersects this is always an isosceles triangle with both links 1 and 3 as hypotenuses, as will be described later in the operation of the transmission mechanism 10. On the other hand, as mentioned above, the support pins 11 and 12 of the base 6, the main links 1 and 2, and the rod 16
and auxiliary links 3 and 4 of rod 16 and rod 2
0 constitute a parallelogram link mechanism, so the rod 20 is always attached to the support pins 11, 1, regardless of the rotational movement of the links 1, 2, 3, 4, etc.
It will be located in the same plane as the plane connecting the two.
Therefore, for example, the third
If the initial state is set so that the oxygen lance 8 is horizontal as shown in Figure a, then the oxygen lance 8 can be maintained in a horizontal state and operated back and forth as shown in Figures b and c. I can do it.

The above operation will be explained with reference to FIG. Considering a triangle with the elbow pin 14, support pin 11, and wrist pin 18 as vertices, the rotation angle α of the main link 1 with respect to the base 6 and the rotation angle β of the auxiliary link 3 with respect to the main link 1 are as described above. so always β
=2α. Therefore, since the angle γ between the auxiliary link 3 and the horizontal line is always equal to α, the above triangle becomes an isosceles triangle as described above. Therefore, the wrist pin 18 is the support pin 1.
If the initial state is set to be the same height as 1, the height of the wrist pin 18 will be kept constant thereafter. This wrist pin 18 supports both ends of the rod 20 together with the wrist pin 19 of the other auxiliary link 4, and since the rod 20 is connected to the base 6 by the two parallelogram link mechanisms as described above, the oxygen As shown in figure c, the lance 8 is
A horizontal posture is always maintained at the same height as the initial state. In addition, when actually carrying out the work, as shown in Fig. 5, after holding the oxygen lance 8 at the desired angle and inserting it into the furnace through the slag discharge port B, the tip of the lance is inserted into the molten steel D. Make sure to insert it in the appropriate place. Note that when the tip of the oxygen lance 8 becomes short due to wear or the like, the oxygen lance 8 can be moved forward in a similar manner. To move the oxygen lance 8 backward, it is sufficient to reverse the drive source 5, and to store the oxygen lance 8, it is sufficient to move the cart C in the direction perpendicular to the plane of the paper in the state shown in FIG.

Although not shown, in order to measure the temperature of the molten steel D, collect samples, and remove slag adhering to the slag outlet B, a lance with a working instrument such as a thermometer attached to the tip is used. If it is attached to the mounting member 20a of the device so as to be rotatable in a vertical plane and can be depressed by a separate air cylinder or the like, the desired operation can be performed.

An example of a case where it is desired to move the lance vertically is the following repair work on the inner wall of a ladle. As shown in FIG. 4, the links 1 to 4 of the device are arranged so as to expand and contract in the vertical direction, and the furnace material blowing pipe 28 is positioned vertically downward in the center of the ladle E. This is done by attaching the retainer 28a to the attachment member 20a of the device. In this way, the retainer 28
Since the furnace material spraying pipe 28 can be rotated by a and the retainer 28a can be moved up and down by the same device, the ladle E can be moved by the nozzle 28b attached to the tip of the furnace material spraying pipe 28. Furnace material can be sprayed onto the entire inner wall of the furnace. Furthermore, although not shown, repair work on the inner walls of various melting furnaces can be performed in the same manner.

According to a device using such a parallelogram link mechanism, a long working machine is connected to the main links 1 and 2.
Since it can be moved over a distance approximately four times longer than that of the auxiliary links 3 and 4, even if short links are used, the work equipment can be displaced with a desired large stroke. Therefore, it functions efficiently even in a limited space in front of the furnace. Further, since the oxygen blowing hose and the temperature measuring conductor described above can be housed in each link, there is less slack on the piping and wiring, and damage to them is reduced.

〔Effect of the invention〕

As explained above, in the present invention, one end of each of the two main links constituting the parallelogram link mechanism is pivotally attached to the base, and the mounting member for mounting various work equipment is attached to the parallelogram. Since it is attached to the other end of two auxiliary links connected to a shaped link mechanism, it enables remote control of various automatic steelmaking operations, improving working conditions without exposing workers to high temperatures. Furthermore, it can be applied to various tasks with high precision. In addition, since no space is required for the device not only during operation but also when storing it, an extremely practical effect is achieved in that the so-called limited space in front of the furnace can be used effectively.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional plan view of essential parts in one embodiment of the present invention, Fig. 2 is a schematic side view, and Figs. 3a to 3c.
4 is a sectional view showing the state of repair work on the inner wall of the ladle, and FIG. 5 is a view of the state of work in which oxygen is blown into molten steel. 1, 2...main link, 1a, 2a...one end,
1b, 2b...other end, 3, 4...auxiliary link,
3a, 4a... one end, 3b, 4b... other end,
6... Base, 8... Work equipment (oxygen lance),
10... Transmission mechanism, 11, 12... Support pin, 2
0a...Mounting member.

Claims (1)

[Scope of Claims] 1. One end of the main link is rotatably attached to two different points on the base, and these two main links form a parallelogram link mechanism, and each other end of the main link is rotatably attached to two different points on the base. One end of the auxiliary links held in parallel is rotatably attached to each of the two auxiliary links, and the other ends of these two auxiliary links are provided with mounting members for mounting various working equipment for steelmaking, One end of the auxiliary link is connected to a support pin fixed to a base for supporting the main link by a transmission mechanism with a tooth ratio of 1:2. Automatic work equipment.