JPS6330953Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a hanger lifting device for a bucket for preheating scrap, and more specifically, a hanger for suspending a bucket for preheating scrap to be charged into an electric steelmaking furnace. This invention relates to a levitation device.

[Prior art]

The exhaust gas generated during the operation of an electric steelmaking furnace has a large amount of heat, so if the retained heat is used to separately preheat the scrap charged into the electric steelmaking furnace, the melting power in the electric steelmaking furnace can be reduced. It is possible to reduce the amount of steel and steel manufacturing time. For this purpose, an exhaust gas duct is installed in the building in which the electric steelmaking furnace is installed, and a device for preheating the scrap is installed in the exhaust gas path. Incidentally, the exhaust gas is removed from dust in a combustion tube or the like before it is introduced into the scrap preheating bucket, but after entering the preheating bucket, the temperature drops, it is treated separately, and then discharged to the atmosphere.

In order to charge the scrap preheated by the exhaust gas introduced into the preheating bucket into the electric steelmaking furnace as described above, the exhaust gas is introduced and the hood that closes the bucket is removed, and the preheating bucket is moved by an overhead crane or the like. It must be lifted up and moved onto the electric steelmaking furnace. A tiltable hanger is provided on the top of the preheating bucket for hanging onto the hook of a crane. Since the food truck moves forward and backward in the space above the preheating bucket, the hanger is designed to fall to the side of the bucket so as not to obstruct the movement of the truck. When the food cart moves sideways from above the bucket, the hanger is raised to raise it, and the preheating bucket can be lifted by hooking the crane hook onto it.

[Problem that the invention attempts to solve]

As mentioned above, if a bucket is installed in a building equipped with an electric steelmaking furnace to preheat scrap using its exhaust gas, and the equipment is placed close to each other, the above-mentioned hanger It becomes difficult to hang the crane hook.
In other words, the exhaust gas duct through which the exhaust gas from the electric steelmaking furnace flows has extended to the vicinity of the preheating bucket, and the end of the second floor is close to the preheating chamber that houses the preheating bucket. These obstacles interfere with the descent of the crane hook, making it impossible to hook the hook onto a fallen hanger. In such a case, it is necessary to manually guide the hook and pull up the hanger, which takes time and effort, and there is a problem that rationalization is hindered. In order to avoid this, sufficient space must be secured in advance when installing the scrap preheating device. Therefore, if there is not enough space in the building or the existing electric steelmaking furnace equipment is installed in a narrow space,
There is a problem that it is difficult to introduce a scrap preheating device.

The present invention was devised in view of the above-mentioned problems, and its purpose is to make it possible to easily hang the crane hook on the hanger of the preheating bucket even when the various devices in electric steel manufacturing equipment are placed close to each other. To provide a hanger elevating device which can automatically raise and lower a tiltable hanger even in a narrow place.

[Means for solving problems]

The features of the scrap preheating bucket hanger lifting device of the present invention will be described with reference to Fig. 1.
A scrap preheating bucket 8 (see Figure 3) having a hood 37 (see Figure 2) that can move forward and backward is provided with a hanger 11 (see Figure 3) for hoisting and transporting the bucket with a crane. A telescopic cylindrical body 24 having an inner cylinder 22 that contacts the hanger, and an outer cylinder 23 containing the inner cylinder 22 and an inner cylinder lifting cylinder 27 is erected near the bucket,
The telescopic cylindrical body 24 is swingable by an up-and-down following means 29. Then, upon receiving the signal that the hood has retreated, the hanger leaning toward the side of the bucket is pressed by the tip of the inner cylinder 22 extending from the outer cylinder 23, and the hook 16 of the crane (see Figure 3)
A controller is provided for raising the hanger to a position where it can be hung, and for retracting the inner cylinder 22 supporting the hanger into the outer cylinder 23 when putting the hood on the bucket.

[Effect]

When the hood 37 on the preheating bucket 8 is retracted, the hanger 11 tilted toward the side of the bucket
is pressed by the tip of the inner cylinder 22 extending from the outer cylinder 23, and the undulating follower means 29 applies rocking to the extensible cylinder 24 to support the pressing part that moves in an arc in accordance with the rise and fall of the hanger. Raise the hanger to the specified position, and when it stops, hang the hook on the hanger. On the other hand, when putting a hood on a baguette, first support the hanger hung on the hook 16 with the extended inner tube 22,
After removing the hook, the inner tube 22 is retracted into the outer tube 23, and the hanger is tilted toward the side of the bucket.

[Effect of idea]

The present invention includes a telescoping cylinder consisting of an inner cylinder and an outer cylinder, and an up-and-down following means that makes the telescoping cylinder swingable, and moves the inner cylinder forward and backward from the outer cylinder in response to a signal such as when the hood is retracted. Since the controller is provided, the hanger of the preheating bucket can be hung on the hook of the crane even when the scrap preheating bucket is installed in a narrow space with various equipment. A tilted hanger can be raised, and a hanger removed from the hook can be evacuated to the side of the bucket. Therefore, even if the electric steelmaking equipment, the scrap preheating device, and their auxiliary equipment are placed close to each other, the bucket can be suspended and the smooth operation of the scrap preheating device can be maintained.

〔Example〕

The present invention will be described in detail below based on examples thereof. FIG. 2 is an overall plan view in which a scrap preheating device using exhaust gas is provided in one building in which the electric steelmaking furnace 1 is installed. A furnace top elbow 2 is attached to the outlet of the electric steelmaking furnace 1, and an exhaust gas duct 4 is provided through a break flange 3 connected to the furnace top elbow 2, through which exhaust gas is led out. The exhaust gas contains a lot of dust and at the same time has high heat. Since the exhaust gas also contains unburned materials, the unburned materials are burned in the combustion tube 5 and dust is removed, and the exhaust gas is supplied to the scrap preheating device 7 through the exhaust gas duct 6. The scrap preheating device 7 has a scrap preheating bucket 8 as shown in FIG. 3 installed in a preheating chamber 9, and the body of the preheating bucket 8 has a space (not shown) for storing scraps. A clamshell 10 is attached to the lower part to receive the scraps and to open in two halves to discharge the scraps. A hanger 11 for hoisting the preheating bucket 8 is attached to the upper part of the preheating bucket 8 so as to be tiltable.
As shown in the figure, a hanger arm 13 is rotatable at a hanging center 12 provided at the top of the preheating bucket 8, and a mounting portion 1 for attaching a hanger metal fitting 14 to the tip of the hanger arm 13.
5 is integrated, and a hanger metal fitting 1 is attached to the end of the attachment part 15 to be hung on a hook 16 of an overhead crane.
4 are integrated. A support body 17 with a round cross section is fixed to the above-mentioned attachment part 15, and the support body 17 prevents the attachment part 15 from being deformed when the tip of an inner cylinder 22 of a hanger lifting device 21, which will be described later, comes into contact with the support body 17. protected.

As mentioned above, the hanger arm 13 rises and falls in the vicinity of the exhaust gas duct 19 connected to the header 18 (see Figure 2) connected to the exhaust gas duct 6, and the hook 16 suspended from the crane lifts the hanger in the vicinity. It is hung on and removed from the metal fitting 14. The hanging work is carried out on the exhaust gas duct 19.
A hanger lifting device 21 is installed near the preheating bucket 8 in order to make this possible without being obstructed by the preheating bucket or the second floor 20.

As shown in FIGS. 1 and 4, this is composed of a telescoping cylinder 24 consisting of an inner cylinder 22 and an outer cylinder 23, and has a structure in which the inner cylinder 22 can extend upward relative to the outer cylinder 23. There is. The inner cylinder 22 is supported by a guide roller 25 with respect to the outer cylinder 23, and has a tip that comes into contact with the support 17 described above, and a stopper member 26 consisting of two round bars is attached to the tip. It is being The stop member 26 is attached to the support body 17
When moving, it must be in constant contact with the
Support 1 that moves in an arc around a suspension center 12
You must move according to 7. For this purpose, the hanger elevating device 21 has an inner cylinder elevating cylinder 27 housed in an outer cylinder 23, and a piston rod 27a thereof is housed in the aforementioned inner cylinder 22. In this example, a clevis 28 is provided at the tip of the piston rod 27a, and the clevis 28 is connected to the lower surface of the stop member 26 inside the inner cylinder 22. The inner cylinder 22 can be expanded and contracted with respect to the outer cylinder 23 by the cylinder 27 for raising and lowering the inner cylinder, but as mentioned above, it is necessary to move it in accordance with the arcuate movement of the support 17. An undulating cylinder 29 is provided as an undulating follower for undulating the cylindrical body 24. This cylinder 29 is supported by a bracket 31 provided opposite to a bracket 30 that supports the outer cylinder 23, and the tip of the piston rod 29a is rotatably connected to the bracket 33 fixed to the outer cylinder 23 via a connecting rod 32. It is connected to the. Incidentally, the arc movement of the support body 17 supported by the stop member 26 is as shown in FIG.
The angle is approximately 45 degrees, and the amount of expansion and contraction of the undulation cylinder 29 may be small, and the undulation of the telescoping cylinder 24 is approximately as shown by the imaginary line in FIG. The expansion/contraction and undulation of the telescopic cylinder 24 is such that it moves in and out from between the second floor 20 and the upper edge of the preheating bucket 8 shown in FIG. 3, and the movement is compact without coming into contact with the exhaust gas duct 19. It is becoming possible to do this. Inner cylinder 2
The guide roller 25 that smoothes the movement of the roller 2 and supports it is a roller support 3 provided on the outer cylinder 23.
4, and the inner cylinder 22 moves so as to be sandwiched between a pair of upper and lower guide rollers 25.
Furthermore, on top of the preheating bucket 8, there is a food cart 3 that moves horizontally along the rails 35 shown in FIG.
The hood 37 placed on the hood 6 has arrived, and the furnace top elbow 38 attached to it is connected to the exhaust gas duct 1.
It is now connected to 9.

The apparatus configured as described above is provided with a control device that can interlock the operation of the telescoping cylinder 24 with the movement of the hood truck 36 and, if necessary, the crane. In response to the signal that the hood truck 36 has retreated, the hanger 11 tilted toward the side of the bucket is pressed by the tip of the inner cylinder 22 extending from the outer cylinder 23, and the undulating cylinder 29 is pressed against the extendable cylinder 24. Swing the hanger 1 until it reaches the position where the hook 16 can be hung.
Although not shown, a controller is separately provided which outputs a signal to raise the hanger 1 and to retract the inner cylinder 22 supporting the hanger 11 into the outer cylinder 23 when the hood 37 is placed on the bucket bag 8.

By using the device configured as described above, the hanger 11 of the preheating bucket 8 can be raised and lowered within a narrow space in the following manner. In addition,
This will be explained with reference to the flowchart shown in FIG. First, the food cart 36 in the state shown in FIG. 2 is moved in the direction of the arrow 39 (Step 1 of the flowchart, hereinafter referred to as S1, etc.).
The hood 37 is removed from the space above the preheating bucket 8 and retreated to the space 40. When the hood 37 is placed on the bucket bag 8, the hanger 11 is at the lowest position indicated by the imaginary line A1 in FIG. 3, and the telescopic cylinder 24 is in its most contracted state.

As can be seen from the figure, the hanger 11 is lying below the second floor 20, and above it there is an exhaust gas duct 19.
Even if the hook 16 of the crane comes down, it is in such a state that it cannot be hung on the hanger fitting 14. Therefore, the hanger lifting device 21
The inner cylinder lifting cylinder 27 is extended and the inner cylinder 22
advances (S2), and the support body 17 comes into contact with the stop member 26 at the tip of the inner cylinder 22 and is pushed up. Since the support body 17 is displaced while drawing an arc using the hanger arm 13 as an arm, the telescoping cylinder 24 is swung by the expansion or contraction operation of the undulation cylinder 29 (S3). When the hanger arm 13 is gradually propped up and reaches the position indicated by the imaginary line A2 in FIG. 3 (S4), the operation of the hanger lifting device 21 is stopped (S5). In this state, the hook 16 can be hung on the hanger fitting 14 (S6),
It no longer interferes with the exhaust gas duct 19 or the like. When the hook 16 moves upward in the direction of the arrow 41, the hanger arm 13 becomes vertical (S7) and becomes ready to lift the preheating bucket 8 (S8). At that point, support by the hanger lifting device 21 is not required, so
The inner cylinder lifting cylinder 27 is reduced in size, and the inner cylinder 22 is retracted so as not to interfere with the lifting of the preheating bucket 8 by the crane. Hook 16
The scrap preheating bucket 8 lifted up is transported directly above the electric steelmaking furnace 1 shown in FIG.
The lower clam shell 10 is then opened and the preheated scrap is charged into the electric steel making furnace 1.

The empty clam shell 10 of the bucket 8 is closed, transported again, and unloaded into a scrap loading pit (not shown). Another preheating bucket 8, in which the scrap to be preheated has already been charged, is lifted and moved to the upper part of the preheating chamber 9 (S
9). When the hook 16 is gradually lowered by the crane and stored in the preheating chamber 9 (S10), the hook 16 is moved from the position indicated by the solid line to the position A2 indicated by the imaginary line (S10).
11). On the other hand, the inner cylinder 22 of the hanger lifting device 21 has been extended to the position shown in the figure (S12), and the hanger arm 13, which has been brought down to the position of the imaginary line A2 by the movement of the hook 16, is moved to the hanger lifting device 21. I can lean over and be supported. In this state, the hook 16 is removed (S13), the inner cylinder 22 gradually enters the outer cylinder 23, and the undulating cylinder 29
The movement of the support body 17 is followed by the hanger 11, and the hanger 11 is tilted down to the most tiltable position A1 (S
14). Simultaneously with or after the tilting operation,
The evacuated hood truck 36 moves forward again directly above the preheating bucket 8, and the furnace top elbow 38 of the hood 37 attached to the hood truck 36 is connected to the exhaust gas duct 19. The above operations are carried out on one of the two preheating buckets 8, 8, and when one is preheating the scraps, the scraps are thrown into the other bucket or that bucket is placed on standby. .

In the above embodiment, the hanger arm 13
The undulating cylinder 2, which is an undulating follow-up means, moves in accordance with the arc movement of the support 17 fixed to the mounting part 15 of the
A command signal is output from the controller to cause the cylinder 9 to extend and retract.
Accurate interlocking is required for the telescopic operation with 7. Therefore, the hydraulic pressure of the undulating cylinder 29 is released during the expansion and contraction operation of the cylinder 27 for raising and lowering the inner cylinder, and the stop member 26 attached to the tip of the inner cylinder 22
Utilizing the fact that it is engaged with, it may be made to function as an up-and-down following means to swing the telescoping cylinder 24. Therefore, the inner cylinder 22
As the telescopic cylindrical body 24 expands due to the advance, the telescopic cylindrical body 2
4 is swung about a support point in the bracket 30. Note that the undulation cylinder 29 is connected to the hanger 11.
It does not have the function of supporting the telescopic cylinder 24 when it is being raised or lowered, and supports the telescopic cylinder 24 which is disengaged from the support body 17 after the hanger 11 is hung on the hook 16. The hanger 1 can be retracted to an upright position below, or the retracted telescoping cylinder 24 can be brought down to the side of the preheating bucket 8.
It expands and contracts when picking up 1. In any case, at least one of the undulation cylinder 29 or the stop member 26 is required as the undulation following means,
It is selected as appropriate from the viewpoint of controllability in the controller.

[Brief explanation of the drawing]

Figure 1 is a front view of the hanger lifting device for the scrap preheating bucket of the present invention, Figure 2 is a plan layout of electric steel manufacturing equipment, Figure 3 is a front view of the scrap preheating device, and Figure 4 is the hanger lifting device of the present invention. The rear view and FIG. 5 are flowcharts explaining the operating procedure. 8... Scrap preheating bucket, 11... Hanger, 16... Hook, 22... Inner cylinder, 23...
... Outer cylinder, 24 ... Telescopic cylinder, 26 ... Stopping member (undulation following means), 27 ... Cylinder for raising and lowering the inner cylinder,
29... undulation cylinder (undulation following means), 37...
…Hood.

Claims (1)

[Scope of Claim for Utility Model Registration] A scrap preheating bucket with a hood that can move forward and backward is provided with a hanger for lifting and transporting the bucket with a crane. An extensible cylindrical body having an outer cylinder containing a cylinder for raising and lowering the cylinder is erected near the bucket, and the extensible cylindrical body is swingable by an up-and-down following means, and a signal indicating that the hood is retracted is provided. In response, the hanger leaning toward the side of the bucket is pressed by the tip of the inner cylinder extending from the outer cylinder, and raised to a position where the crane hook can be hung, and when the hood is placed on the bucket, the hanger is pressed. A hanger lifting device for a bucket for scrap preheating, characterized in that a controller for retracting a supported inner cylinder into an outer cylinder is provided.