JPS63312909A - Apparatus for exchanging tuyere in blast furnace - Google Patents

Abstract

PURPOSE:To easily and safely execute exchanging work of a tuyere with few workers by shiftably laying hitting device on a heavy weight laying table of a heavy weight shifter and pulling out or inserting the tuyere by hitting force of the hitting device through a tuyere engaging tool. CONSTITUTION:An air hammer 4, guide rail 3, etc., are shifted to the front of the tuyere T position with a fork lift 1 and a fork working part 23 is finely adjusted to rectangular direction to the hitting direction with a handle 24 and the air hammer 4 is finely adjusted while swinging with a swinging part 15. When the direction of the air hammer 4 coincides with the pull-out direction of the tuyere T, the tuyere engaging member 13 fitted to an exchanging lever 12 is engaged with the tuyere T and the exchanging lever 12 and connecting tool 11 are connected with a head pin 25. Under this condition, the air hammer 4 is worked and the tuyere T is pulled out and next, inserted. By this method, the exchanging work of the tuyere T is executed with a simple apparatus for a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention mainly relates to a blast furnace tuyere replacement device that can easily replace tuyeres for feeding hot air, etc. into a blast furnace with a small number of personnel.

(Prior art) The tuyere that sends high-temperature hot air from a hot blast furnace into a blast furnace (blast furnace) is not only because the hot air itself is extremely high temperature, but also because it often comes into direct contact with molten steel slag, hot metal, etc. The wear and tear of hardware can cause breakage accidents, which can disrupt operations, so tuyere hardware must be periodically replaced for maintenance after a certain period of use.

Therefore, the conventional tuyeres were replaced as shown in FIGS. 7 to 9.

That is, the removal work involves, for example, inserting the tip of a long steel rod 31 into the tuyere T of the blast furnace B, and attaching the hook 32 formed at the tip of the steel rod 31 to the tuyere T, as shown in FIG. Hang it on T. A weight 33 is fitted onto the steel rod 31, and a striking plate 34 is fixed to the steel rod 31 in a substantially brim shape.
3 collides with the striking plate 34 from the tuyere T side, and the tuyere T is pulled out from the blast furnace B by the impact force.

Moreover, at this time, the steel rod 31 is supported in an appropriate state by the worker H, etc., and the weight 33 is also collided with the striking plate 34 by the worker H using a robot holder 5, etc. to perform this work. Ta.

In addition, for the installation work, for example, as shown in Fig. 8, first,
The tuyere T is hooked onto the tip of a long steel rod 36, and the tuyere T is carried to the cold hardware 37 in the tuyere and temporarily installed. At this time, the steel rod 36 is supported by an operator H or the like in an appropriate state, for example, by suspending the vicinity of the tip of the steel rod 36 with a wire 38 or the like, applying the lever principle, and pushing it while lifting it.

Thereafter, as shown in FIG.
9 is struck with a steel rod 40, and the mounting tapered surface 41 of the tuyere T and the cold hardware 37 in the tuyere is rubbed against the tapered surface 4 of the outer periphery of the tuyere T.
This is done in close contact with 2. Others, JP-A-5
No. 4-145308 and Japanese Utility Model Application Publication No. 54-182606 disclose devices that use a cart to easily replace tuyeres.

(Problems with the Prior Art) However, the steel pipe with the tuyere T has the following problems.

First, since the steel rod 31 itself requires a certain degree of strength, the steel rod 31 cannot be made very thin, which increases its weight.
- Requires 4 workers H.

Second, when the weight 33 is caused to collide with the striking plate 34, the work is done using lobes 35 or the like as shown in the figure, but if the weight 33 itself is not heavy, the impact force will not be large, so the weight will inevitably increase. , worker H will be forced to perform heavy labor.

Thirdly, since the installation process is carried out in the steps described above, the fitting tapered surface 42 of the tuyere T may be damaged or the proximal end surface 39 may be dented, making it difficult for the tuyere T to be used. It is often impossible.

If this happens, a gap may be created between the tuyere T and the cold hardware inside the tuyere, or a connection failure may occur with the blower branch pipe (not shown) that sends hot air, resulting in an emergency situation in which toxic hot air is blown out. becomes dangerous. Therefore, the work requires a large number of workers H and careful work, resulting in a very troublesome work.

Therefore, overall, this tuyere T replacement work requires heavy labor and a large number of workers H, so there is a problem in that it becomes a very large-scale work.

Furthermore, in the device disclosed in Japanese Patent Application Laid-open No. 54-145308, the main body of the device is difficult to move, and installation and removal requires labor and time. Utility Model Application No. 54-182606 does not have a means for applying vibration or impact force, which is essential when replacing a firmly fixed tuyere, and has a practical drawback.

Therefore, in view of the above-mentioned problems, the present invention enables the replacement of the tuyere of a blast furnace to be easily carried out by a small number of workers, and also allows the striking direction to be set in the direction in which the tuyere is removed. It was created with the aim of making it possible to easily and accurately perform matching work, and to perform tuyere replacement work safely and without damaging the tuyere.

(Means for solving the problem) The present invention provides a heavy object moving device such as a forklift,
A striking device installed on the heavy object platform of the moving device;
Consisting of a replacement rod connected to the impact section of the impact device and a tuyere locking device attached to the tip of the replacement rod, the impact device moves in the impact direction on the heavy object storage section. The above-mentioned problems are solved by forming the heavy object placement part so that it can be moved in a direction perpendicular to the impact direction, and by forming the impact device so that it can be rotated. do.

(Function) The blast furnace tuyere replacement device according to the present invention allows the impacting device to be easily moved by mounting the impacting device on the heavy object placement part of a heavy object moving device such as a forklift. Using striking force, the tuyere is removed or fitted through the replacement rod and tuyere locking device.

At this time, the heavy object placement section is moved and adjusted in a direction perpendicular to the impact direction, and the impact device is rotated and adjusted on the heavy XT device to adjust the impact direction and the tuyere removal. Match the direction.

(Example) The present invention will be described in detail below with reference to FIGS. 1 to 6.

That is, the reference numeral 1 shown in the figure is a forklift,
This is so that heavy objects can be placed on the fork 2 and moved.

Two guide rails 3 are placed on the fork 2 serving as a heavy object loading section in the front and back direction of the forklift 1.
is attached, and an air hammer 4 as a striking device is placed on this guide rail 3 so that the striking direction of this air hammer 4 is parallel to the guiding direction of the guide rail 3. The air hammer 40 is configured to impact movement on the guide rail 3 by the impact force.

This air hammer 4 has, for example, a structure as shown in FIG. The compressed air is fed in, an impact piston 9 serving as an impact section is moved back and forth, and then the compressed air is exhausted from an exhaust hole 10.

A replacement rod 12 is attached to the tip of the impact piston 9 of the air hammer 4 via a connector 11 and is pivotably attached to the head pin 25. Further, at the tip of the replacement rod 12, a tuyere locking tool 13 made of a hook or the like for taking out the tuyere T of the blast furnace B is formed or attached. In this case, the replacement rod 12 is supported movably only in the guide direction by a support portion 14 extending from the tip of the guide rail 3.

On the other hand, as shown in FIGS. 2 and 3, the guide rail 3 is formed so that it can be pivoted on the fork 2 by a pivot portion 15.

In particular, as shown in FIG.
A channel steel 17 is fixed to the lower surface of the fork 2 in parallel with the fork 2 with its opening facing each other, and the fork 2 is inserted into the channel steel 17 to fix the base 16 on the fork 2. This base 16 is formed as follows.
A rotating plate 18 is placed on the rotating plate 18, and the guide rail 3 is fixed on the rotating plate 18. In this case, a circular pivot column 19 is provided at the center of the lower surface of the pivot plate 18.
A circular hole 20 is formed in the center of the base 16 into which the pivot column 19 can be fitted. The face plate 21 is inserted and fixed, a slight gap is provided between the rotating column 19 and the rotating face plate 21, and grease is injected into the gap from the grease nipple 22 provided at the center of the rotating plate 18 to ensure smooth rotation. This is how it is formed.

In addition, the fork 2 itself has, in particular, 1. As shown in FIG. 4, the fork operating part 23 of the forklift 1 is formed to be movable perpendicular to the impact direction of the air hammer 4, that is, the guide direction of the guide rail 3,
This movement is performed by rotating the handle 24,
This allows the position of the fork 2 itself to be adjusted.

In the blast furnace tuyere replacement device formed in this way, the tuyere locking tool 13 differs depending on the shape of the tuyere T and the work of removing or fitting it, and the tuyere locking tool 13 is different from the one shown in FIG. The mouth locking device 13 is hook-shaped and is adapted to hook the tuyere T and pull it out, and the tuyere locking device 13 shown in FIG.
The tuyere locking tool 13 shown in FIG. It is formed so that it can be inserted and pressed. These tuyere locking tools 13 are used for the replacement rod 1
It can be replaced by replacing the tuyere locking tool 2 itself, or by replacing only the tuyere locking tool 13.

Next, to explain its use, first, the forklift 1
The air hammer 4, guide rail 3, etc. are connected to the tuyere T.
The air hammer 4 is moved to the front of the position, and fine adjustments are made using the handle 24 and the rotating portion 15, so that the striking direction of the air hammer 4 and the drawing direction of the tuyere T match.

Next, as shown in FIG. After that, the air hammer 4 is operated to connect the tuyere T.
Remove and fit.

Therefore, if the work is performed according to the above procedure, worker H will be able to
It only takes 3 people and can be easily done in a short time.

It goes without saying that the structure of the tuyere replacement device is not limited to the embodiment described above.

[Effects of the Invention] The present invention configured as described above includes a heavy object moving device such as a forklift, a striking device mounted on a heavy object placing portion of the moving device, and a striking portion of the striking device. It consists of a mounting rod connected to the mounting rod and a tuyere locking device attached to the tip of the mounting rod. Therefore, all of these can be easily moved using a heavy object moving device, so the work of positioning the tuyere replacement device in front of the tuyere T can be done by one worker H operating the heavy object moving device. It can be done easily.

Moreover, the impact device is formed to be movable in the impact direction on the heavy object placement section, and the heavy object placement section is formed to be movable and adjustable in a direction perpendicular to the impact direction. ,′
Since the impact device is configured to be rotatably adjustable, fine adjustments can be easily made to match the impact direction of the impact device with the direction in which the tuyere T is pulled out.

Since the fine adjustment can also be made on the heavy object placement section, it can be done by two or three operators H. Also, when the position of the impact device is misaligned with respect to the tuyere T, the movement is adjusted in a direction perpendicular to the impact direction, so that the angle of the impact direction is misaligned with respect to the drawing direction of the tuyere T. In such a case, the direction in which the tuyere T is pulled out and the direction in which the tuyere T is struck can be perfectly matched by adjusting the rotation of the striking device.

As a result, the impact itself is automatically performed by the impact device, and the task of matching the impact direction with the direction of the tuyere T extraction can be easily performed, so fewer people (actually 2 to 3 people) can perform the impact itself. is sufficient, but it makes it easy to replace the tuyere T without damaging it.
Moreover, it can be done safely and in a short time.

As described above, according to the present invention, it is possible to safely replace the tuyere with a simple structure without requiring any complicated equipment, and the work can also be done in a short time with a small number of workers. Since the tuyere replacement work can be performed in a vacuum, the cost of replacing the tuyere can be reduced, and it has superior effects compared to surgeries such as drainage.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, in which FIG. 1 is a front view of the main part in a state where the tuyere is replaced, FIG. 2 is a plan view of the main part, and FIG. 3 is a cross-section of the rotating part. Fig. 4 is a plan view of the heavy object placed on it, Fig. 5 is a front view of the working state, Fig. 6 is a sectional view of the striking device, and Figs. 7 to 9 are the conventional tuyere FIG. 3 is a schematic diagram showing a replacement work state. B... Blast furnace, T... Tuyere, H... Worker, 1...
・Forklift, 2... Fork, 3... Guide rail, 4... Air hammer, 5... Air intake, 6... Switching valve, 7... Front chamber, 8... Rear Room, 9・
... Impact piston, 10... Exhaust hole, 11... Connector, 12... Mounting rod 12.13... Tuyere locking tool, 1
4... Support part, 15... Swivel part, 16... Base,
17... Channel steel, 18... Turning plate, 19... Turning column, 20... Circular hole, 21... Turning face plate, 22...
・Grease nipple, 23...Fork operating part, 24
... Handle, 25 ... Head pin, 31 ... Steel bar, 32 ... Hanging, upper hook, 33 ... Weight, 34 ...
Blow plate, 35... Lobe, 36... Steel rod, 37...
-Cold hardware in the tuyere, 38...wire, 39...base end surface, 40...steel rod, 41...mounting tapered surface, 42
...Grinding tapered surface.

Claims (1)

[Claims] 1. A heavy object moving device such as a forklift, a striking device installed on the heavy object placing part of this moving device, a replacement rod connected to the impacting section of the impacting device, and a replacement rod at the tip of the replacement rod. The impact device is configured to be capable of impact movement in the impact direction on a heavy object placement part, and the heavy object placement part is perpendicular to the impact direction. 1. A tuyere replacement device for a blast furnace, characterized in that the tuyere replacement device for a blast furnace is formed so as to be adjustable in movement in a direction, and a striking device is formed so as to be adjustable in rotation.