JPH0618226Y2 - Furnace inner wall spray repair device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a furnace inner wall spray repair device, and particularly to a blast furnace,
Electric furnace, special smelting furnace, ladle, lime shaft furnace, etc., suitable for spraying and repairing damaged parts of lining refractory material, with the spraying machine inserted in the furnace and suspended. The present invention relates to an improvement of a furnace inner wall spray repairing device that repairs an inner wall of a furnace by ejecting an irregularly shaped refractory material while moving a spray nozzle arranged in a spraying machine.

[Prior art]

As is well known, in the various furnaces mentioned above, since the lining refractory material is locally worn or dropped by the latter half of its operation or by using it many times, partial repair (intermediate repair) of the inner wall of the furnace is required to maintain its service life. Has been done. As a device for repairing the inner wall of the furnace from outside the furnace during the operation or temporarily interrupting the operation, there is disclosed in Japanese Patent Laid-Open No. 60-4.
In 782, as shown in FIG. 10, the spraying machine 14 is inserted into the furnace and is hung from the working deck 12 near the upper opening 10 of the furnace to be repaired. A device for spraying an indefinite refractory substance for repair to a damaged portion 8A of a furnace wall 8 by vertically moving and a horizontal swiveling motion of a spray nozzle 16 in which a cantilever arm 18 is almost in the furnace. An arm traversing device 20 extending horizontally, a trolley 22 provided with a cylinder 23 for storing the spraying machine 14 in a portrait orientation and tilting in the furnace, and a traveling wire 25 for the trolley 22.
The trolley traveling device 24 for traveling on the cantilever arm 18 by the above, and the lifting winch 26 for suspending and lifting the spraying machine 14 with the wire 27 are provided.
4, material feeding hose, pressurized water hose, compressed air hose,
It is disclosed that a pressure feed hose 28, which is a bundle of electric cables, is connected. In the figure, 30 is a repair material pressure-feeding device, 32 is a pressurized water pump, 33 is an air conditioner press, and 35 is a cooling box in which accessories (a TV camera, a radiation thermometer) of the spraying machine 14 are stored. As shown in FIG. 11, an air motor 40 is built in the spraying machine 14, and chain sprockets 42, 44,
The nozzle mounting portion 50 to which the spray nozzle 16 is mounted by the mechanism of the swivel joint 46 and the bearing 48.
The swivel shaft 49 including the rotary shaft is rotatably driven by 360 °. Therefore, the tip of the spray nozzle 16 can make a reciprocating swing motion at a predetermined angle in a horizontal position with respect to the furnace wall 8. At the time of work, first, the lifting wire 27 is fully wound, the spraying machine 14 is stored in the trolley 22, and it is rolled over, and then inserted into the furnace through the opening 10 and sprayed in a tilted state of about 20 °. After mounting the nozzle 16, the cylinder 23 is made to stand upright. Next, the spraying machine 14 is stopped at the central axis position of the furnace by the trolley traveling device 24, and the lifting winch 26 of the spraying machine 14 is operated to lower the spraying machine 14 to a predetermined level and stop it. Material pressure feeding device 30,
Spraying can be performed by activating the air motor 40, the pressurized water pump 32, and the air conditioner 33 to eject the repair material while horizontally reciprocating the spray nozzle 16.

[Problems to be solved by the device]

However, in the conventional device, the cantilever arm traverse device 2
No. 0 was installed on the upper work deck 12 located in the upper opening 10 which is a movable armor hole, so that if the cantilever arm traverse device 20 is always installed, it interferes with other work. Therefore, it is necessary to install the complete set including the cantilever arm traverse device 20 at the time of spraying, and to remove the set after the spraying is completed, but since there are other structures around the main body of the blast furnace, the intake is not easy. , The installation man-hour becomes large. Further, there is a problem in that a dedicated take-in device is required, and the equipment cost becomes large. In addition, in the conventional device, since the cantilever arm 18 is formed of shaped steel with the trolley 22, not only can the cross-sectional shape of the cantilever arm 18 not be made very small, but also the lifting wire 27 and the pressure feeding hose. Since it is necessary to separately pass 28, the size of the opening 10 cannot be reduced so much, not only the construction cost for providing the opening in the iron shell of the furnace is required, but also the strength of the iron shell is reduced. Furthermore,
There was a problem that the wires and hoses were exposed and separated, and durability and workability were poor. Further, the conventional apparatus has a problem that the posture of the spraying machine 14 cannot be controlled when the spraying machine 14 is suspended from the trolley 22. Further, in the conventional device, since the air motor 40 for rotationally driving the spray nozzle 16 is built in the main body of the spray machine 14, the outer dimension of the spray machine 14 cannot be reduced so much. From this aspect, the size of the opening 10 could not be made too small. Further, since the air motor 40 is exposed to the high temperature atmosphere in the furnace, it causes a motor burnout and has a problem such as low durability.

[The purpose of the device]

The present invention has been made to solve the above-mentioned conventional problems, and can reduce the man-hours and equipment costs required for installation and installation in the furnace to be repaired, and can also control the attitude of the spraying machine. An object of the present invention is to provide a furnace inner wall spray repair device.

[Means for solving problems]

The present invention, with the spraying machine inserted in the furnace and suspended,
In a furnace inner wall spray repair device that repairs the inner wall of the furnace by ejecting an irregularly shaped refractory material while moving the spray nozzle installed in the spraying machine, a cantilever placed under the work deck above the furnace. An arm mounting base and a tubular cantilever arm in which a hose or cable is housed inside, which is detachable from the cantilever arm mounting base by suspending the spraying machine with a plurality of lifting wires at the tip. Mutual lengths of the cantilever arm traversing means arranged on the cantilever arm installation mount and the plurality of lifting wires for inserting the tip of the cantilever arm into the furnace and fixing it at a predetermined position. And the means for controlling the attitude of the spraying machine by adjusting the.

[Action]

The present invention provides a tubular cantilever arm which is detachable from a cantilever arm installation pedestal disposed on the upper part of the furnace below the work deck in the above furnace inner wall spray repair device. At the tip of the wire, a plurality of lifting wires are used for suspension. Therefore, the apparatus can be used commonly for each furnace, and the equipment cost can be reduced. Also, because the trolley is omitted and the cantilever arm is tubular,
You can store hoses and cables in the cross section,
It is possible to minimize the size of the iron shell opening, reduce the construction cost, and prevent the iron shell strength from decreasing. Furthermore, the durability (heat resistance) of the hoses and cables is improved to prevent burnout, defects due to mutual entanglement can be prevented, and workability is improved because they can be set together. Further, in the present invention, the cantilever arm traversing means for inserting the tip of the cantilever arm into the furnace and fixing it at a predetermined position is disposed on the cantilever arm installation base below the working deck. Therefore, even if the cantilever arm traverse means is permanently installed, it does not interfere with the normal work performed on the work deck, and only the cantilever arm, spraying machine, and accessory equipment for spraying can be installed during spraying. As a result, it is sufficient to take in, and the man-hours for installation and the man-hours for taking in can be reduced. Furthermore, since the upper part of the work deck is opened, it is possible to take in the existing roof top crane, and the equipment cost can be reduced. Further, the present invention is provided with means for controlling the attitude of the spraying machine by adjusting the mutual lengths of the plurality of lifting wires. Therefore, it becomes possible to remotely control the attitude of the spraying machine suspended from the tip of the cantilever arm.
When the spraying machine is inserted into the furnace, the size of the opening can be minimized by minimizing the projected cross-sectional area of the opening, which reduces the construction cost of the iron shell opening. In addition, it is possible to prevent a decrease in the strength of the iron shell. Furthermore, it becomes possible to install the spray nozzle outside the furnace and then insert the spray machine into the furnace, thus improving workability. Further, by remotely controlling the attitude of the spraying machine during spraying, vertical spraying is also possible.

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this embodiment, as shown in FIG. 1, with the spraying machine 14 inserted into the furnace 8 and suspended, the spray nozzle 16 disposed in the spraying machine 14 is moved while the amorphous fireproofing is performed. In a furnace inner wall spray repairing device for ejecting a substance to repair the inner wall of a furnace, a cantilever arm installation stand 30 arranged below the work deck 12 above the furnace 8 and the spraying machine 14 at the tip end
A circular cantilever arm 18 which is suspended from the cantilever arm installation base 30 and which is suspended by a lifting wire 27 of a book, and the tip of the cantilever arm 18 is inclined downward in the furnace 8. For inserting and fixing in place,
The cantilever arm moving wire 3 constituting the cantilever arm traversing means disposed on the cantilever arm installation base 30.
1, a cantilever arm moving winch 32 and a pair of front and rear cantilever arm clamp devices 34, and by adjusting the mutual lengths of the two front and rear two of the four lifting wires 27, a spraying machine The spraying machine tilting device 36 for controlling the posture of the blower 14 is provided. In the figure, 38 is an electric motor for raising and lowering the spraying machine, which is disposed at the rear end of the cantilever arm 18 and is used for raising and lowering the spraying machine 14 by winding or rewinding the entire lifting wire 27. The winch 40 is a pipe seat for inserting the spraying machine. As shown in detail in FIG. 2, the spraying machine 14 is provided outside the furnace, for example, an electric motor or an air motor 60 which is a nozzle drive source disposed on the work deck 12, and a casing 61 of the spraying machine 14. A nozzle drive gear 62 and a nozzle-side driven gear 64 that constitute a nozzle drive gear, and a flexible shaft 66 that connects the electric motor or the air motor 60 to the drive gear 62 are provided. In the figure,
Reference numeral 68 is a bearing that rotatably supports the drive gear 62 in the casing 61 of the spraying machine 14, 72 is a rotation guide of the swivel shaft 49, 74 is also a thrust bearing, and 76
Is a seal, 78 is a pipe joint, and 80 is a spray nozzle 1.
6 is a counterweight, 82 is a double tube for protecting the flexible shaft 66 from heat, 83 is a material pressure-feeding hose for pressure-feeding powdery amorphous furnace material, 8
Reference numeral 4 is a pressurized water hose for sending water for spraying, and 86 is a water header. The spraying machine 14 is extremely miniaturized by providing the nozzle drive source outside the furnace, and the cantilever arm 18 is provided.
Can be stored between guides. The sprayer tilting device 36 includes four lifting wires 27 for suspending the sprayer 14 as shown in detail in FIG.
Out of the two, a roller 36A provided in the middle of the two on the rear side (furnace wall side) for simultaneously changing the lengths of the two wires
And for changing the position of the roller 36A in the vertical direction,
For example, the handle 3 arranged on the side surface of the cantilever arm 14.
6B and the roller 3 by rotation of the handle 36B.
6A and a wire 36C for moving the position 6A up and down. Therefore, by rotating the handle 36B to change the position of the roller 36A in the vertical direction, the lengths of the two wires on the rear side among the wires that suspend the spraying machine 14 are interlocked. It can be changed, which allows the attitude of the sprayer 14 to be controlled remotely. As shown in detail in FIG. 3, the electric winch 38 for raising and lowering the spraying machine rotates the wire winding drum 38A that winds four rear ends of the lifting wire 27 together and the wire winding drum 38A. It is composed of a driving electric motor 38B. Therefore, by rotating the wire winding drum 38A by the electric motor 38B, the spraying machine 1 can be operated without changing the relative length of the lifting wire 27.
The spraying machine 14 can be moved up and down while maintaining the posture of 4. As shown in FIG. 4, a material pressure feed hose 83, a pressurized water hose 84, an air hose 88, a power cable 90 and the like are built in the circular cantilever arm 18. Therefore, the hoses can be collected and housed integrally in the cantilever arm 18 that also serves as a guide, and the workability is improved. In the figure, 18A is a guider for a hose. The lifting wire 27 is also housed in the side wall 18B of the cantilever arm 18, as shown in detail in FIG. Therefore, not only the wires are neatly stored, but also the total cross-sectional area including the hoses and the wires is small. In this embodiment, since the cantilever arm 18 has a circular cross-sectional shape, a large strength can be obtained with a minimum cross section, and the iron shell opening can be made small to reduce the equipment cost. The cross-sectional shape of the cantilever arm 18 is not limited to a circular shape, and may be any other shape as long as it is tubular. The operation of the embodiment will be described below. First, when the cantilevered arm 18 is set in the target furnace 8, as shown in FIG. 6, the lifting wire 27 is moved by the electric winch 38 for lifting the spraying machine by the existing furnace top crane 92 or the like.
The cantilever arm 18 in which the spraying machine 14 is housed at the tip is carried in by winding up, and is guided in the downward tilted state while being guided by the rollers of the clamp device 34 of the cantilever arm installation base 30. Insert and fix. The spray nozzle 16 and its counterweight 80 are attached to the lower part of the spray machine 14 with the spray machine 14 on the existing deck 94 outside the furnace. In this way, since the spray nozzle 16 and the counterweight 80 can be attached outside the furnace, the workability is very good and the attachment can be done in a short time. Then, as shown in FIG. 7, by rotating the handle 36B of the spraying machine tilting device 36 to lower the position of the roller 36A, the spraying nozzle 16 attached to the lower end of the spraying machine 14 is cantilevered. The spraying machine 14 is rotated by a predetermined angle θ so as to be substantially parallel to the arm 18. This allows the size of the opening 10 to be minimized,
It is possible to reduce the construction cost of the iron shell opening and prevent the iron shell strength from decreasing. Next, as shown in FIG. 8, the cantilever arm moving winch 32 is rewound to send out the cantilever arm moving wire 31 and the cantilever arm 18 slides on the roller built in the clamp device 34. Then, the cantilever arm 18 is inserted into the furnace. Here, since the cantilever arm clamp device 34 is attached at a position where the cantilever arm 18 inclines downward, the cantilever arm 18 can be easily inserted into the furnace by its own weight. In addition, when pulling out, the cantilever arm moving winch 32 is wound up and the cantilever arm moving wire 31 is pulled in.
The cantilever arm 18 can be pulled out. In the present embodiment, since the cantilever arm 18 is attached to the cantilever arm installation base 30 in a state of being inclined downward, only one cantilever arm moving winch 32 is provided, and the cantilever arm 18 is put in and taken out. Is possible. When the cantilever arm 18 is inserted to the predetermined depth,
By the cantilever arm clamp device 34, the cantilever arm 1
Clamp and fix 8. Next, as shown in FIG. 9, by moving the roller 36A of the sprayer tilting device 36 upward, the sprayer 14 is moved.
To a predetermined spray angle, for example, the horizontal state. As a result, the spraying work similar to the conventional one can be performed. If the spraying machine tilting device 36 is driven by a cylinder or the like, it is possible to perform vertical spraying in which spraying is performed while moving the spraying nozzle 16 in the vertical direction. In this embodiment, an electric winch 38 for raising and lowering the spraying machine is used.
Since only one is electrically operated and the others are manually operated, the configuration is simple and the power consumption is low. Note that other winches can be electrified or pneumatically driven. In addition, a cantilever arm 1 with hoses and cables together with wires
Since it is housed in the hose 8, the heat effect on the hose can be prevented, and the hose or wire can be prevented from being entangled. Furthermore, in this embodiment, the nozzle drive source of the spraying machine 14 is provided outside the furnace, so the spraying machine 14 should be made particularly small.

[Effect of device]

As described above, according to the present invention, the cantilever arm can be shared by each furnace, and the size of the iron shell opening can be made small, which is required for installation and installation in the furnace to be repaired. It is possible to reduce man-hours and equipment costs. Further, it has an excellent effect that the attitude of the spraying machine can be controlled.

[Brief description of drawings]

FIG. 1 is a front view showing the overall structure of an embodiment of a furnace inner wall spraying maintenance device according to the present invention, and FIG. 2 is a cross-sectional view showing the main part structure of the spraying machine used in all the embodiments. FIG. 3 is a perspective view showing the structure of the spraying machine tilting device and the lifting electric winch of the embodiment, and FIG. 4 is a perspective view showing a state in which hoses are stored in a cantilever arm. The figure is also a sectional view, FIG. 6 is a side view showing a state in which a cantilever arm is attached to an installation base, and FIG. 7 is a side view showing a state in which a spray nozzle and a counterweight are attached to a spraying machine,
FIG. 8 is a side view showing a state where the cantilever arm is inserted into the furnace, FIG. 9 is a side view showing a spraying state after the cantilever arm is inserted, and FIG. 60-478
11 is a side view showing the overall configuration of the conventional example disclosed in FIG.
FIG. 1 is a sectional view showing the structure of the conventional spraying machine. 8 ... Furnace, 12 ... Work Deck, 14 ... Spraying machine, 16 ... Spraying nozzle, 18 ... Cantilever arm, 10 ... Opening part, 27 ... Lifting wire, 30 ... Cantilever arm Installation base, 32 ... Cantilever arm moving winch, 34 ... Cantilever arm clamp device, 36 ... Spraying machine tilting device, 38 ... Spraying machine lifting winch.

Claims (1)

[Scope of utility model registration request] 1. A furnace for repairing an inner wall of a furnace by ejecting an amorphous refractory substance while moving a spray nozzle arranged in the sprayer while the sprayer is inserted into the furnace and suspended. In the inner wall spray repair device, the cantilever arm installation stand placed under the work deck at the upper part of the furnace and the cantilever arm installation stand that suspends the spraying machine at the tip with a plurality of lifting wires Can be attached and detached,
A tubular cantilever arm having a hose or cable housed inside, and a piece provided on the cantilever arm installation base for inserting the tip of the cantilever arm into the furnace and fixing it at a predetermined position. A furnace inner wall spray repairing device comprising: a holding arm traversing means; and a means for controlling the attitude of the spraying machine by adjusting the mutual lengths of the plurality of lifting wires.