JPS624812A - Automatic operation device for steel making - Google Patents

Abstract

PURPOSE:To decrease the space of a titled device, to simplify the operation and to provide versatility thereto by attaching auxiliary links to the other ends of the main links connected to a base plate and providing an attaching member for mounting working apparatus to the other ends of the auxiliary links. CONSTITUTION:One ends 1a, 2a of the main links 1, 2 are attached to different two points on the base plate 6 to form a parallelogram type link mechanism. One ends 3a, 4a of the auxiliary links 3, 4 are attached to the other ends 1b, 2b of the main links 1, 2. The attaching member 20a is provided to the other ends 3b, 4b of the auxiliary links 3, 4 and various working apparatus such as lance are mounted thereto. One end 3a of the auxiliary links 3, 4 is connected via a transmission mechanism 10 constituted to 1:2 gear ratio to a supporting pin 11 by which the main link 1 is supported. The remote control of various automatic operations is made possible by the above-mentioned mechanism, by which the operating conditions are improved.

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, as a device for blowing oxygen into molten steel in an operating electric furnace for steelmaking, there is a device in which an oxygen lance for blowing oxygen is supported by a plurality of pinch rollers so that it can be freely extended to maintain a fixed posture. . A cart that can be operated to feed out this 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 position in the 78 steel by appropriately feeding out the lance to account for the amount of oxygen that has been consumed by melting into the molten steel. Can be blown.

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.In order to make effective use of this space, the above-mentioned feeding device must also be small and not bulky. It is hoped that this will be improved.

In addition, in the above-mentioned feeding device, it is not easy 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 for 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 the following features:
The main link 1 is rotatably attached to two different points on the base 6.
, 2 are attached, and these two main links 1.2 form a parallelogram linkage, and
One end 3a, 4a of a parallel held auxiliary link 3.4 is rotatably attached to each other end 1b, 2b of the main link 1.2, and the other end of these two auxiliary links 3,4 3b and 4b are provided with a mounting member 20a for mounting various types of work equipment made of M steel layer, and one end 3a of the auxiliary link 3.4 has a transmission mechanism 10 with a tooth ratio of 1:2. , is configured to be connected to a support pin 11 fixed to a 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 oxygen sequential operation state, in which oxygen is blown into the molten steel in the electric steel making furnace A. this is,
A cart C equipped with a device for feeding out the oxygen lance 8 by a parallel link mechanism is stopped in front of the furnace, and the oxygen lance 8 is inserted diagonally from above into the melt 11D through the slag outlet B.

At the upper end of the base 6, which is erected on the cart C and is driven to turn by the drive source 7, are one ends 1a, 2a51 of the main links 1 and 2 of the same length! l<The other end 1b of this main link 1.2, which is rotatably connected in a vertical plane.

2b, one end 3a of auxiliary link 3.4 having the same length as these.
, 4a are similarly rotatably connected in a vertical plane. The above four links 1, 2 and 3°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 parked near the slag discharge port B, the two parallelogram link mechanisms mentioned above are extended diagonally downward, the oxygen lance 8 is inserted into the furnace from the slag discharge port B, and the tip is placed at an arbitrary position in the molten metal. It is possible to sequentially supply oxygen during molten steel by arranging a molten steel.

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

FIG. 1 shows a connecting portion between the main link 1 and the base 6 in a state where the main links 1, 2 and the auxiliary links 3, 4 are mutually extended;
and a cross-sectional plan view showing the connection between the main links 1 and 2 and the auxiliary links 3 and 4, in which one ends 1a and 2a of the main links 1.2 are horizontally fixed to two branched locations at the upper end of the base 6. It is pivotally connected to support pins 11 and 12, and a gear 1 is mounted on this support pin 11.
1a is fixed. Gear 1.1 a is support pin 1
A sprocket 13b meshes with a gear 13a fixed to a planetary pin 13 which is pivotally supported on one end 1a of the main link 1 adjacent to and parallel to the main link 1 at a tooth ratio of 1:1. It is fixed to the planetary pin 13.

Elbow pins 1 are attached to the other ends 1b and 2b of the main link 1.2.
4.15 is pivotally supported, one end of the elbow pin 14 is connected to the drive source 5 disposed at the other end 1b of the main link 1 and rotationally driven, and the central part is connected to one end 3a of the auxiliary link 3. The outer end of the rod 16 is fixed, and the outer end is pivotally supported by one end of the rod 16, and a gear 14a is fixed to the portion covered by the main link 1.

This i-wheel 14a meshes with a gear 17a fixed to a gear pin 17 that is close to the elbow pin 14 and pivotally supported on the other end 1b of the main link 1 at a tooth ratio of 1:2.
A sprocket 17b is fixed to the gear pin 17 adjacent to the sprocket 17b. This sprocket 17b is chain 1
It is connected to the sprocket 13b via the sprocket 3c at a rotation ratio of 1:1. As described above, the transmission mechanism 10 that connects the one end 3a of the auxiliary link 3 and the support pin 11 via the elbow pin 14 is the above-mentioned gear mechanism with a gear ratio of 1:2 and an interlocking mechanism consisting of a sprocket and a chain. It consists of

A wrist pin 18.19 is pivotally supported at the other ends 3b, 4b of the auxiliary links 3, 4, respectively.
are fixed to both ends of the rod 20, and a mounting member 20a is provided on the upper surface of the rod 20 for mounting an oxygen lance 8 (see FIG. 5).

Main links 1, 2 and auxiliary links 3.4 are shown in Figures 1 and 2.
In the extended state as shown in the figure, if the elbow pin 14 is now rotated by the angle θ in the direction of the arrow 14b by the drive source 5, the auxiliary link whose one end 3a is fixed to the elbow pin 14 3 rotates by an angle θ in the direction of arrow 33 in FIG. 2 with respect to the main link 1 with the elbow pin 14 as the center of rotation. On the other hand, the elbow pin 14 has a tooth ratio of 1 as described above.
: Since the support pin 11 is fixed to the base 6, the gear 13a rotates in the direction of the arrow 13d and rotates around the gear 11a by an angle 2θ. revolve. Therefore, the main link 1 is configured to rotate by an angle % θ in the direction of the arrow 31 in FIG. 2 with the support pin 11 as the center of rotation.

Note that the drive source 5 for operating the transmission mechanism 10 may be configured to drive the planetary pin 13 or gear pin 17 described above. Further, if a mechanism using a bevel gear or the like is used instead of the interlocking mechanism consisting of a sprocket and a 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 5, when both links 1 and 3 are rotated, the triangle formed by both links 1 and 3 and a horizontal line that intersects them is always rotated by both links, as will be described later with the operation of the transmission mechanism 10. It becomes an isosceles triangle with 1.3 as the hypotenuse. On the other hand, as described above, the support pins 11 and 12 of the base 6, the main links 1 and 2, the rod 16, and the rod 16, the auxiliary links 3 and 4, and the rod 20 each constitute a parallelogram link mechanism, so the rod 20 is each link L 2, 3 . ．． It is always located in the same plane as the plane connecting the support pins 11 and 12, regardless of the rotational movement of the support pins 11 and 12.

Therefore, for example, FIG.
), if the initial state is set so that the oxygen lance 8 is horizontal, then the oxygen lance 8 can be kept in a horizontal state at all times and operated back and forth as shown in the same figure (bL (C1). Can be done.

The above operation will be explained with reference to FIG. Considering the triangle whose vertices are the elbow pin 14, the support pin 11, and the wrist pin 18, the rotation angle α of the main link 10 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. There is always a relationship 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, if the initial state is set so that the wrist pin 18 is at the same height as the support pin 11, the height of the wrist pin 18 will be maintained constant thereafter. This wrist pin 18 supports both ends of the rod 200 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 lance 8, as shown in the same figure (C),
It will always maintain a horizontal position at the same height as the initial state = When actually performing the work, the oxygen lance 8 should be held at the desired angle as shown in Figure 5. After putting the slag into the furnace through the exhaust port B, the tip of the slag is melted 6[
) so that it is inserted into the appropriate place inside. In addition, when the tip of the oxygen lance 8 becomes short due to wear, etc., the oxygen lance 8 can be moved forward using the same operation.

To move the oxygen lance 8 backward, the drive source 5 may be reversed, and to store it, the cart C may be moved in the direction perpendicular to the plane of the paper in the state shown in the figure (&).

Although not shown in the figure, in order to measure the temperature of molten steel, 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 the device is attached to the mounting member 20a of the device so as to be rotatable in a vertical plane, and can be raised and raised using 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 to expand and contract in the vertical direction, and the furnace material is sprayed so that the tube 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
The furnace material is sprayed by rotating the tube 28 (and the retainer 28a can be moved up and down by the same device, so the furnace material is sprayed by the nozzle 28b attached to the tip of the tube 28).
This allows the furnace material to be sprayed over the entire inner wall of the ladle E. 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, long work equipment can be connected to the main links 1 and 2 and the auxiliary link 3.
, 4 can be moved over a distance approximately four times as long as the length of the link, so even if a short link is used, the work implement can be displaced with a desired large stroke. Therefore, it functions efficiently even in the limited space in front of the furnace. In addition, each link can accommodate the aforementioned oxygen serial hose and temperature measuring wire, so
There is less slack in 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 a mounting member for mounting various work equipment is provided.
Since it is attached to the other end of two auxiliary links connected to a parallelogram link mechanism, it enables remote control of various automatic steelmaking operations, and improves working conditions as workers are not exposed to high temperatures. Moreover, 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 the drawing]

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. 3(a) to 3fc) are operating state diagrams. FIG. 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-Lifetime link, la, 2a -- one end, lb. 2 b - 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
．． 12-11 support pin, 20a-attachment member;

Claims (1)

[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 has a parallel One end of the held auxiliary links is rotatably attached to each, and the other ends of these two auxiliary links are provided with mounting members for attaching various working equipment for steelmaking, and the auxiliary links are An automatic working device for steel making, characterized in that one end of the 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.