JPH0213471Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention suspends a splash cover between the installation position on the top of the tap tap trough of the blast furnace and the retracted position outside the tap tap trough of the blast furnace. This invention relates to a device for attaching and detaching a splash cover that is lowered and moved.

"Prior Art" Conventionally, a general-purpose jib crane 1 as shown in FIGS. 11 and 12 has been used for this type of attachment/detachment device. The crane 1 is, for example, an air-driven crane, and its support 1a is installed near the tap opening of a blast furnace. Then, using the hook 1b of the crane 1 to lift the splash cover C, and using the rotation of the crane 1, the splash cover C is attached to the attachment position _P1 above the tap tap gutter of the blast furnace. Work was being carried out to remove it to evacuation position _P2 outside the blast furnace's tap tap trough.
Splash cover C is installed at position P ₁ during tapping.
It is placed in a predetermined mounting position against the wall, and is temporarily removed only when opening the tap hole.
It is placed in a free position relative to P ₂ .

``Problem that the invention seeks to solve'' However, in the case of the conventional installation device using the general-purpose jib crane 1, the splash cover C is suspended only by the hook 1b of the crane 1. If the balance of the splash cover C becomes out of order, the splash cover C will start rotating and swinging when it is hung. The balance of the splash cover C may be affected by the fact that molten slag etc. may adhere to the splash cover C during tapping, or the splash cover C may be affected by hot metal.
It is easy to become unbalanced due to melting loss.

Therefore, when attaching and detaching the splash cover C, in addition to the operator of the crane 1, a signal person and a worker who stops the rotation of the splash cover C and adjusts the position are required. Moreover, this work was extremely dangerous because the splash cover C was exposed to hot metal and molten slag and became extremely hot, and there was also a lot of dust and high-temperature flying objects. Also, the weight of splash cover C is 6
It weighed ~7 tons and was nearly 6 meters long, so even though it was suspended, handling the splash cover C was hard work.

This invention solves these conventional problems.

``Means to solve the problem'' The splash cover attaching/detaching device of this invention is
To solve the above conventional problems. In a splash cover attaching/detaching device that suspends and moves the splash cover between a mounting position on the top of the tap tap trough of a blast furnace and a retracted position outside the tap tap trough of the blast furnace, the splash cover is moved in a horizontal plane. a swinging crane that is rotatably suspended from the swivel crane and swings on a trajectory that passes above the installation position and the evacuation position; an attitude control rod that has one end connected to a fulcrum at a fixed position of the splash cover; a holding mechanism that is provided on a base side and holds the other end of the attitude control rod at a position a certain distance away from the fulcrum of the splash cover when the swing crane swings above the mounting position; The present invention is characterized by comprising a position adjustment mechanism that is provided on the base side of the crane and adjusts the position of the other end of the attitude control rod when the swing crane swings above the retracted position.

``Operation'' The splash cover attaching/detaching device according to this invention has one end connected to the fixed position of the splash cover and the other end of the attitude control rod connected to the rotation position of the crane suspending the splash cover. By determining the position, the suspended splash cover is uniquely held in a predetermined installation position above the splash cover installation position at the top of the tap hole of the blast furnace, while the splash cover is suspended in the retracted position. To make it possible to freely change the posture of a splash cover, thereby making it easy to attach and detach the splash cover.

``Example'' Below, examples of this invention are shown in Figures 1 to 10.
This will be explained based on the diagram.

1 to 5 represent one embodiment of this invention.

In this embodiment, 2 in the figure is a jib crane, the support 2a of which is erected on the cast bed, and the support 2a rotates around the upper and lower axis O ₁ between the bearings of the upper and lower supporting hardware 2b and 2c. Arm 2
d can rotate. The crane 2 is rotated by a rotation drive device 2e provided on the lower support hardware 2c. The crane 2 also has a hook 2g that is hoisted up and down by a chain or wire 2f. The chain or wire 2f is hoisted up and lowered by a hoist 2h on the crane 2.

A column control rod fulcrum pedestal (hereinafter referred to as "pedestal") 3 is provided on the column 2a, and a predetermined arcuate guide groove 3a is formed in this pedestal 3. A fulcrum pin 5 provided on a fulcrum mounting auxiliary pedestal (hereinafter referred to as "auxiliary pedestal") 4 is fitted into the guide groove 3a.
It is possible to slide the fulcrum pin 5 in a guided state within a. Therefore, the fulcrum pin 5
When the auxiliary base 4 slides, it moves in an arcuate trajectory along the guide groove 3a. The auxiliary pedestal 4 is slid by a cylinder 6 attached to the trunnion of the pedestal 3. A brake 7 is provided between the pedestal 3 and the auxiliary pedestal 4, and this brake 7 moves the auxiliary pedestal 4 to the pedestal 3.
By pressing it against the side, the auxiliary base 4 is fixed at an arbitrary sliding position.

One end of an attitude control rod 8 of a predetermined length is rotatably attached to the fulcrum pin 5, and the other end of this attitude control rod 8 is attached to a rod 9 in the splash cover C that is the target of attachment/detachment work. Fitted together. The rod 9 is placed on a seat 10 at a fixed position on the splash cover C, and a circular hole provided at the other end of the attitude control rod 8 is fitted into the rod 9 so as to be rotatable and slidable up and down. It is matched. Thereby, the rod 9 serves as a fulcrum for the attitude control rod 8 in the splash cover C. Splash cover C has 4 for hanging.
Book rods 11 are attached, and these are suspended from the hook 2g of the crane 2 mentioned above in a state where they are gathered at one point _P3 . 2g of hook
The splash cover C is hung rotatably in a horizontal plane.

By the way, the guide groove 3a of the pedestal 3 is located at the installation position of the splash cover C at the upper part of the tap hole of the blast furnace.
It is formed in an arc shape centered on the rod 11 when it is in position P ₁ (the position of the splash cover C indicated by the solid line in FIG. 1), and the attitude control rod 8 is connected to these rods 11 and the guide groove 3a. It has a length spanning between In other words, the guide groove 3a has an arc shape with the rod 11 as the center and the length of the attitude control rod 8 as a radius. Further, the fulcrum of the attitude control rod 8 located at the rod 9 on the splash cover C, that is, on the side of the splash cover C, is
The splash cover C is set at an eccentric position a predetermined distance away from the hanging position _P3 when viewed from above.

Next, the effect will be explained.

When the splash cover C is attached to the attachment position _P1 above the tap hole of the blast furnace, its attitude is a predetermined attitude as shown by the solid line in FIG. In this installed state, the third
As shown by the solid line in the figure, the tip end portion of the rod 9 fits into the other end of the attitude control rod 8. In this state, the fulcrum pin 5 at one end of the attitude control rod 8
Even if it moves within the guide groove 3a, it does not affect the posture of the splash cover C in any way. This is because the shape of the guide groove 3a is an arc with the rod 11 at the center and the radius equal to the length of the attitude control rod 8. In other words, the fulcrum pin 5 at one end of the attitude control rod 8 is held at a position a certain distance away from the rod 9 at the other end of the attitude control rod 8 by the length of the attitude control rod 8. . At such a point, the arc-shaped guide groove 3a and the fulcrum pin 5
connects one end of the attitude control rod 8 to the rod 9 on the other end.
It forms a holding mechanism that holds the camera at a certain distance from the camera.

When removing the splash cover C in such an attached state, the splash cover C is first lifted up by the crane 2, as shown by the two-dot chain line in FIG. As a result, the tip end portion of the rod 9 in the splash cover C fits into the other end of the attitude control rod 8. At this time, the auxiliary pedestal 4 is stopped by the brake 7 and the fulcrum pin 5 is set at one position. Then, the crane 2 is rotated above the retreat position _P2 . Along with this turning, the splash cover C gradually changes its attitude and reaches above the retracted position _P2 . The manner in which the posture changes and the posture at the retracted position _P2 differ depending on the position of the fulcrum pin 5 defined within the guide groove 3a. Figure 1 shows the fulcrum pin 5
Fig. 2 shows the case where the position of the fulcrum pin 5 is set at the upper side in the figure in the guide groove 3a, and Fig. 2 shows the case where the position of the fulcrum pin 5 is set at the lower side in the figure in the guide groove 3a.

In this way, the manner in which the attitude of the splash cover C changes and the attitude at the retracted position _P2 are arbitrarily determined depending on the fixed position of the fulcrum pin 5 within the guide groove 3a. In the plan view shown in FIGS. 1 and 2, the rotation center O ₁ of the crane 2 and the hanging position of the splash cover C are
P ₃ , the fulcrum pin 5 on one end side of the attitude control rod 8,
A so-called link mechanism is constructed with the four nodes of the rod 9 on the other end side of the attitude control rod 8, and the relationship between these links is determined by the position of the fulcrum pin 5, which is one of the nodes. This is to change. The position of the fulcrum pin 5 is adjusted by the expansion and contraction movement of the cylinder 6, and is fixed by the brake 7. Further, the position of the fulcrum pin 5 in the guide groove 3a is determined while the crane 2 is turning or when the crane 2 is
It is possible to make adjustments even after the has turned above the retracted position _P2 . As a result, the postures of the splash cover C can be further diversified.

Then, move the splash cover C to the retracted position P ₂
While still being lifted upward, the position of the fulcrum pin 5 in the guide groove 3a is further adjusted to bring the splash cover C into an attitude in which it will be placed on the retracted position _P2 . In this respect, the guide groove 3
a, the fulcrum pin 5, and the cylinder 6 constitute a position adjustment mechanism that adjusts the position of the fulcrum pin 5 on one end side of the attitude control rod 8 when the crane ₂ swings above the retracted position P2. After determining the attitude of the splash cover C in this way, the splash cover C in that attitude is lowered by the crane 2 and placed at the retreat position _P2 .

Then, the taphole opening work is carried out, and after the work is completed, the splash cover C is reinstalled at the mounting position P ₁ on the top of the tapwater gutter by the reverse operation of the above case.
Return to At this time, the posture of the splash cover C on the mounting position _P1 is uniquely determined to be a predetermined mounting posture regardless of the position of the fulcrum pin 5 in the guide groove 3a. This is because the arc-shaped guide groove 3a allows the fulcrum pin 5 at one end of the attitude control rod 8 to be connected to the rod 9 at the other end of the attitude control rod 8.
This is because the attitude control rod 8 is held at a position a certain distance away from the attitude control rod 8 by the length of the attitude control rod 8.

As described above, the splash cover C is suspended and moved, and for the mounting position _P1 , it is uniquely determined and placed in a predetermined mounting posture, and on the other hand, for the retracted position _P2 , it is placed in a predetermined mounting posture. Place it in a free position.

By the way, in this embodiment, the attitude control rod 8
An arc-shaped guide groove 3a and a fulcrum pin 5 serve as a holding mechanism for holding the fulcrum pin 5 on one end at a position a certain distance away from the fixed position on the splash cover C side.
The guide groove 3a in the mechanism is further used as part of a position adjustment mechanism for adjusting the position of the fulcrum pin 5 at one end of the attitude control rod 8. In other words, the guide groove 3a
has the function of holding the fulcrum pin 5 at a position a certain distance away from the fixed position seat 10 on the side of the splash cover C, and the function of guiding the fulcrum pin 5 when it moves. Therefore, these two mechanisms are organically coupled to each other. This means that
This is extremely advantageous in simplifying the configurations of both mechanisms.

Figures 6 to 8 represent other embodiments of this invention.

In this embodiment, the control rod 8 has a parallel link structure, and the other configurations are the same as in the embodiments described above. Its parallel links connect nodes L ₁ to _{L 4}
The first to fourth link arms 8a connected at
8d, and the first to third links 8a to 8
c are arranged in pairs (see Figure 8). The first and third arms 8a and 8c are parallel to each other, and the second and fourth arms 8b and 8d are parallel to each other. First and second arms 8a, 8
The node _L1 of b is attached to the arm substrate 8e. The node _L5 at the extending end of the third arm 8c is
It is guided by upper and lower rails 8f on the arm board 8e, and slides along the rails 8f. The arm board 8e is attached to the upper end of the fulcrum pin 5 in the embodiment described above. In this example, the fulcrum pin 5 is rotatably provided by a bearing 12. A node L ₆ at the extending end of the fourth arm 8 d is attached to the fulcrum plate 13 . This fulcrum plate 13 is rotatably attached to the seat 10 of the splash cover C in the embodiment described above. Node L ₆ is located on the same straight line as nodes L ₁ and L ₅ .

Therefore, in this embodiment, the attitude control rod 8 having a parallel link structure can move between the fulcrum pin 5 and the seat 10 in the horizontal direction, regardless of the lifting position of the splash cover C, as shown in FIG. Always maintain a constant distance l. This applies to the first and third arms 8 regardless of whether the splash cover C is raised or lowered.
a, 8c maintain a parallel relationship with each other, and the second,
Since the fourth arms 8b and 8d maintain a parallel relationship with each other, △L ₆ , L ₄ , L ₁ and △L ₁ , L ₂ , L ₅ are always similar, and one node L ₅ This is because the movement of the node L6 is restricted only in the vertical direction by the rail 8f, so the movement of the node _L6 is also limited only in the vertical direction.

Therefore, the attitude control rod 8 having the parallel link structure is constructed by connecting the fulcrum pin 5 in the horizontal direction and the seat 10 on the side of the splash cover C so as to maintain a constant distance between them. It functions similarly to the attitude control rod 8 in the example. As a result, the device operates in the same manner as in the previously described embodiments.

9 and 10 show other embodiments of the position adjustment mechanism for adjusting the position of the fulcrum pin 5 on one end side of the attitude control rod 8. FIG.

In this embodiment, a drive device 14 equipped with a swing motor is used as a means for moving the fulcrum pin 5.
is adopted. This drive device 14 is configured to decelerate the rotation of the swing motor and output it from the shaft 14a. This drive device 14 is attached to the lower side of the pedestal 3 in the above-mentioned embodiment, and the attitude control rod Eight fulcrum pins 5 are slidably provided. A drive plate 15 is attached to the shaft 14a of the drive device 14, and a slit-shaped hole 15a is formed in the drive plate 15 along the direction of the turning radius. The lower end of the fulcrum pin 5 is fitted into the hole 15a. Therefore, the fulcrum pin 5 is simultaneously guided by both the arc-shaped guide groove 3a and the hole 15a, and is located at a location where the two coincide.

In this embodiment, the drive plate 15 is rotated by the drive device 14, so that the fulcrum pin 5 slides along the guide groove 3a in accordance with the rotation angle. Therefore, such a drive device 14 is similar to the cylinder 6 in the embodiment described above.
It functions similarly to adjust the position of the fulcrum pin 5.
When fixing the position of the fulcrum pin 5, braking is applied to the drive device 14. Further, instead of this braking, an auxiliary pedestal 4 may be attached to the fulcrum pin 5, and a braking force may be applied to the auxiliary pedestal 4, as in the case of the above-described embodiment.

In addition, a holding mechanism that holds the fulcrum pin 5 at one end of the attitude control rod 8 at a position a certain distance away from a fixed position on the splash cover C side, and the attitude control rod 8
The structure of the position adjustment mechanism for adjusting the position of the fulcrum pin 5 on one end side is not limited to the above-mentioned embodiment, but can be modified as appropriate. For example, in the former mechanism, when the crane 2 turns to the installation position _P1 of the splash cover C, the attitude control rod 8
It is also possible to adopt a mechanism or the like in which the fulcrum pin 5 on one end side is stopped at one predetermined position by a stopper. Further, as the latter mechanism, it is also possible to adopt a mechanism that adjusts the length of the attitude control rod 8 itself when the crane 2 turns to the retracted position of the splash cover C.

"Effects of the invention" As explained above, the splash cover mounting device according to this invention has one end connected to a fixed position of the splash cover in relation to the turning position of the crane suspending the splash cover. By determining the position of the other end of the attitude control rod, the suspended splash cover is uniquely held in a predetermined mounting position above the splash cover mounting position in the upper taphole of the blast furnace; When the splash cover is in its retracted position, the suspended splash cover can be freely changed.
Above each of the mounting position and the retracted position,
The posture of the splash cover can be automatically set to a suitable posture. Therefore, the following effects are achieved.

Since the attitude of the splash cover is automatically determined, the work of attaching and detaching the splash cover can be performed only by the crane operator, and the number of other signal persons and workers can be reduced.

At the initial and final stages of tapping, there is no need for workers to approach the vicinity of the taphole, which is safe.

Splash cover installation position, retracted position,
By presetting the angle of rotation of the crane between them and the associated automatic setting of the attitude of the splash cover,
The attachment and detachment of the splash cover can be done more automatically.

Even during tapping operations, the posture of the splash cover can be changed very easily by remote control depending on the situation.

As for the splash cover, it can be easily applied to the conventional one by simply modifying it to connect the end of the attitude control rod.

As for cranes, existing technology can be utilized using conventional jib cranes.

[Brief explanation of drawings]

Figures 1 to 5 represent one embodiment of this invention, Figures 1 and 2 are plan views for explaining the operation when the end of the attitude control rod is set at different positions, and Figure 3 4 is a side view, FIG. 4 is a plan view of the vicinity of the end of the attitude control rod, FIG. 5 is a sectional view taken along the line - in FIG. 4, and FIGS. 6 to 8 show other embodiments of this invention. FIG. 6 is a plan view of the peripheral part of the attitude control rod, FIG. 7 is a cross-sectional view taken along the - line in FIG. 6, FIG. 8 is a cross-sectional view taken along the - line in FIG. 7, and FIGS. FIG. 10 shows still another embodiment of this invention, FIG. 9 is a plan view of the vicinity of the end of the attitude control rod, FIG. 10 is a side view of the vicinity of the end of the attitude control rod,
11 and 12 show an example of a conventional attachment/detachment device, with FIG. 11 being a plan view and FIG. 12 being a side view. 2... Crane, 3... Pedestal, 3a... Guide groove, 5... Fulcrum pin, 6... Cylinder, 8...
Attitude control rod, 9... Rod, 10... Seat, C...
Splash cover, P ₁ ... Installation position, P ₂ ...
Evacuation position.

Claims (1)

[Scope of utility model registration request] In a splash cover attaching/detaching device that suspends and moves the splash cover between a mounting position on the top of the tap tap trough of a blast furnace and a retracted position outside the tap tap trough of the blast furnace, the splash cover is moved in a horizontal plane. a swinging crane that is rotatably suspended from the swivel crane and swings on a trajectory that passes above the installation position and the evacuation position; an attitude control rod that has one end connected to a fulcrum at a fixed position of the splash cover; a holding mechanism that is provided on a base side and holds the other end of the attitude control rod at a position a certain distance away from the fulcrum of the splash cover when the swing crane swings above the mounting position; A sprue characterized by comprising a position adjustment mechanism provided on the base side of the crane and adjusting the position of the other end of the attitude control rod when the swing crane swings above the retreat position. Tsushi cover attachment/detachment device.