JPH07316614A - Apparatus for repairing furnace wall of blast furnace - Google Patents

Abstract

PURPOSE:To smoothen the deteriorated part of projecting and recessing part of an inner wall refractory, to remove stuck materials and to improve the working efficiency in the repairing of a damaged part by automizing and remote-operating the repairing work. CONSTITUTION:This repairing apparatus is composed of hanging mechanism 23, 24, 25, 26, 27, 28 being adjustable in the height, a suspending frame 21 having an extendable/shrinkable arm 23 being hung by this hanging mechanism 24-28 and a swing frame 50 arranged with a repairing device 57 at the tip part being swingably hung at the center part of the suspending frame 21. Further, the swing frame 50 for holding the repairing device 57 has the tilting and expendable/shrinkable mechanism and provided with a oscillating mechanism in the repairing device arranging part and is prefered to be provided with a distance sensor for measuring the interval between the repairing device 57 and the furnace wall brick 4 and/or an observing device for photographing an objective range to be repaired. Further, as the repairing device 57, a chipping and smoothening device and an spraying and repairing device for the furnace wall or a thermal spraying and repairing device for the furnace wall are used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace inner wall repairing device used for removing and smoothing deposits on the inner wall of a metallurgical furnace such as a blast furnace or refractory of the inner wall refractory, and for repairing the inner wall refractory of the furnace.

[0002]

2. Description of the Related Art The inner wall of a blast furnace is generally composed of a refrigerating brick or stave and refractory bricks. However, the inner wall of the furnace above the shaft is in a condition of low temperature, and in order to prevent overcooling of the furnace body, about 600 to 800 m
It is lined with chamotte or high alumina brick with a thickness of about m. However, deposits may adhere to the inner wall of the furnace above the shaft of the blast furnace, and if these deposits grow, the reducing gas in the furnace causes a non-uniform flow, making it impossible to carry out an appropriate reducing action, which causes unstable reactor operation. It becomes a factor. Further, the refractory lining in the furnace of the blast furnace is liable to be worn and disappeared due to heat load fluctuations in the furnace and erosive gas attack, in addition to wear and tear due to dropping and contact of raw materials such as ores.

This wear of the furnace wall does not proceed uniformly, but varies depending on the circumferential and height positions, and the in-furnace profile becomes non-uniform in the circumferential and height directions, resulting in coke and sintered ore. In addition to the generation of the mixed layer, the flow of the reducing gas in the furnace becomes non-uniform, which is a serious problem in operation. Further, in the worn portion of the furnace wall, hot spots are generated on the iron shell, which causes deformation and cracks, which is a major cause of shortening the life of the furnace body.

Conventionally, the repair of a worn-down part of a brick wall of a blast furnace is scaled down during a blast, and an irregular shaped refractory is sprayed on the damaged part in the furnace, or a pre-fired refractory panel is applied to the damaged part in the furnace. We have tried to maintain the in-furnace profile by installing it or by pressurizing irregular shaped refractory from the outside of the furnace. However,
In these conventional repairs, unshaped refractory is sprayed or refractory panels are attached without sufficiently removing refractory and deposits on the uneven brick surface of the remaining damaged part of the furnace, so that the furnace cannot be used for a long period of time. The profile could not be maintained, and the operation was continued while repeating repair work.

As another repair method, a water-cooled pipe and a steel frame are combined into an integral structure, a refractory material having a high thermal conductivity is filled between the pipe and the frame, and one surface A water-cooled refractory panel for repairing a blast furnace (JP-A-60-2878), which has a refractory function and a cooling function in combination with a heat-insulating refractory to form a panel, and a metal block internally provided with a cooling function. And a refractory block, a composite cooler with a heat insulating layer interposed between the joint surfaces of the metal block and the refractory block (Japanese Patent Publication No. 60-49834), on the inner surface of the fireproof brick falling damage part. S with excellent wear resistance and spalling resistance
A method has been proposed in which an iC plate is mounted away from the inner surface of the furnace, and a highly adhesive amorphous refractory is poured into the gap between the plate and the inner surface of the furnace (Japanese Patent Laid-Open No. 4-99109).

The water-cooled refractory panel disclosed in JP-A-60-2878, the composite cooler disclosed in JP-B-60-49834, and the SiC plate disclosed in JP-A-4-99109 are not attached. , The refractory and the adhering material on the uneven surface of the remaining brick of the damaged part of the inner wall of the furnace are being pressed in while the irregular refractory is being pressed. Therefore, the gap between the residual brick and the back surface of the water-cooled refractory panel, the composite cooler, the SiC plate, etc. becomes a press-fitting / filling layer containing impurities and foreign matters, and is dense and has a low porosity. Hard to get,
Back wind easily passes through this press-fitting / filling section during operation, and there is a problem with durability. As a countermeasure, it is necessary to remove and smooth the refractory and deposits on the uneven surface of the remaining bricks in the damaged portion of the inner wall of the furnace, and then install the water-cooled refractory panel, composite cooler, or SiC plate. Furthermore, when deposits occur on the inner wall of the furnace, it is necessary to remove them promptly during operation.

For this reason, as a method for removing the residual brick irregularities and deposits on the damaged inner wall of the furnace such as a blast furnace, a supporting beam having a swiveling device is installed and placed in an open furnace top manhole. A device constituted by suspending a rod having a bid attached to a swivel member of the swivel device so as to be able to move up and down, and connecting the bid to a drive device via a connecting member inserted through an opening of a steel shell (Japanese Patent Publication No. 60-43405), a burner that heats the refractory, a breaker that imparts a mechanical impact to the refractory, and a burner that controls the operation of the burner and the breaker on a frame that is moved along the surface of the furnace by a transfer mechanism. (JP-A-3-263590), a method and a device for disassembling the refractory lining by impact of ultra-high pressure water (JP-A-1-200190). Distribution, JP-A-1-212890 publication), etc. have been proposed. Also, as a repair device for damaged parts of the inner wall of the blast furnace, the inner wall repair device of the blast furnace is used to repair the inside of the bellless blast furnace by locking the upper end of the holding frame for spraying the irregular refractory to the raw material charging distribution chute of the bellless blast furnace. In this regard, there is proposed a device (Japanese Patent Laid-Open No. 4-136110) including an up-and-down traveling carriage device that guides the nozzles to move up and down along the up-down direction of the spray nozzle holding frame.

[0008]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 60-43
In the device disclosed in Japanese Patent No. 405, since the rod to which the bid is attached is suspended by the turning member at the top of the furnace, the tip of the bit fluctuates, it is difficult to position the part to be removed of deposits, and the range to be removed is If it is large, the hammer driving device outside the furnace must be repositioned each time, and the hammer driving device must be repositioned frequently, resulting in extremely poor construction efficiency. Further, in the device disclosed in Japanese Patent Laid-Open No. 3-263590, it is necessary to alternately perform heating by a burner and crushing by a breaker in a range for refractory removal, so that the construction efficiency is extremely deteriorated and the bellless Since the breaker is installed on the long vertical swing frame part fixed by the bracket to the raw material distribution chute of the blast furnace, the crushing reaction force by the breaker acts on the vertical swing frame and the raw material distribution chute, and at the base attachment part of the raw material distribution chute. There is a problem that an excessive bending moment acts and the strength cannot be practically endured. Further, since the methods and apparatuses disclosed in JP-A-1-200190 and JP-A-12-12890 basically use a large amount of water, there are few problems if the dismantling work is performed in a short time.
If the dismantling range is wide and the required time is long, a large amount of water will enter the furnace in addition to the range to be dismantled, causing spalling of the refractory lining part, lowering the heat quantity in the furnace and steam explosion. Since it is dangerous, it is not appropriate to apply it when removing the damaged part inside the furnace by reducing the scale when the blast furnace is at rest.

Furthermore, the apparatus disclosed in Japanese Patent Laid-Open No. 4-136110 is an apparatus for spraying and repairing irregular refractory materials, which removes the deteriorated portion of the uneven portion of the refractory material in the damaged portion of the inner wall of the furnace and removes adhered matter. Since it cannot be removed, even if the amorphous refractory is sprayed and repaired, the amorphous refractory sprayed from the deteriorated part will peel off,
It has the drawback that the in-furnace profile cannot be maintained for a long period of time.

An object of the present invention is to improve a furnace inner wall repair device of a blast furnace capable of highly accurately removing and smoothing a deteriorated portion of an uneven portion of a refractory inner wall of a furnace and deposits with high construction efficiency and repairing a refractory of a damaged portion. To provide.

[0011]

[Means for Solving the Problems] The present inventors have conducted various test studies in order to achieve the above object. As a result, an elevating device that moves the entire furnace inner wall repair device vertically and vertically in the blast furnace, and expandable telescopic arms for supporting the furnace inner wall surface at both ends of the suspension frame that suspends the repair device are installed. The pivotable frame that can be tilted in the vertical direction and is extendable and retractable at the center of the frame is capable of swinging, and the repair device, distance sensor, and industrial TV camera are installed at the tip. It has been clarified that by doing so, it is possible to remove and smooth the deteriorated part of the unevenness of the refractory inside the furnace inner wall and the deposit with high accuracy and repair the damaged refractory at high accuracy, and arrived at the present invention.

That is, the present invention comprises the following technical means. (A). A height-adjustable suspension mechanism, a suspension frame having elastic arms that can be expanded and contracted at both ends suspended by the suspension mechanism, and a repair device at the tip of the suspension frame, which is rotatably suspended at the center. And a revolving frame provided. (B). A height-adjustable suspension mechanism, a suspension frame having stretchable arms that are stretchable at both ends suspended by the suspension mechanism, a base end is pivotally supported at the center of the suspension frame, and a stretchable arm is provided at the tip. A pair of radius frames that can be swung and folded are provided, and a swivel frame in which a repair device is arranged at a tip end that is swung in the center of the suspension frame is provided. (C). A tilting and expanding / contracting mechanism is provided on the revolving frame that holds the repair device, and a swinging mechanism is provided on the repair device installation portion. (D). A distance sensor that measures the distance between the repair device and the furnace wall and / or a monitoring device that captures an image of the repair target area is provided in the repair device installation section. (E). A height-adjustable suspension mechanism, a suspension frame having elastic arms that can be extended and contracted at both ends suspended by the suspension mechanism, and a telescopic arm whose tip is pivotally supported at the center of the suspension frame. A pair of radius frames that can be swung and folded, a swivel frame in which a repair device is arranged at the tip end that is swingably suspended in the center of the suspension frame, a repair device provided in the repair device disposition part, and a furnace wall A distance sensor for measuring an inter-distance and / or a monitoring device for photographing an area to be repaired, a front distance sensor and a tail distance sensor arranged before and after the moving direction of the repair device, and a furnace inner wall by the front distance sensor and the tail distance sensor A repair device control unit for controlling the moving speed of the repair device and the surface distance to the inner wall of the furnace based on the detected distance to the refractory is provided. (F). Equipped with a distance sensor that measures the height position of the suspended frame, the swivel position of the swivel frame, the tilt angle, the expansion / contraction length, and the distance between the repair device and the furnace wall, and calculates the profile of the blast furnace inner wall from these measurement data. A judging device was provided. (G). A fishing and smoothing device was installed as a repair device. (H). A furnace wall spray repair device or a furnace wall flame spray repair device was provided as a repair device. (I). As repairing equipment, a fishing and smoothing equipment and a furnace wall spraying repair equipment or a furnace wall flame spray repair equipment were installed.

[0013]

The present invention has the following effects due to the above configuration. (I). A height-adjustable suspension mechanism, a suspension frame having elastic arms that can be expanded and contracted at both ends suspended by the suspension mechanism, and a repair device at the tip of the suspension frame, which is rotatably suspended at the center. By arranging the swivel frame arranged so that it can expand and contract, the overall length of the suspension frame and swivel frame can be made smaller than the minimum inner diameter of the furnace corresponding to the furnace diameter of the blast furnace, and a compact furnace wall repair device can be provided. Easy loading and unloading into the furnace from the top opening (manhole). Therefore, not only the bellless blast furnace having a large manhole for distribution chute replacement for charging raw materials at the furnace top but also the bell blast furnace in which the manhole opening size at the furnace top is restricted by the combination of the large bell and movable armor The furnace wall repair device can be applied.

(B). A height-adjustable hanging mechanism,
A suspension frame having expandable and contractible arms at both ends suspended by the suspension mechanism; and a pair of swivel-foldable radius frames having a base end pivotally supported at the center of the suspending frame and an expandable arm at the tip. By providing a revolving frame in which a repairing device is arranged at the tip suspended so as to be revolvable in the central part of the suspension frame, the entire device becomes compact, and it is easily carried into the furnace from the opening of the furnace top, It can be carried out. In addition, it can cope with changes in the inner diameter of the shaft part of the blast furnace that has a truncated cone shape and changes in the inner wall of the furnace, and supports the inner wall of the furnace in a cross shape at any position in the furnace to rotate the center of repair equipment. The position can be fixed at a predetermined position level in the furnace, the shake during the repair work can be prevented, and the repair target portion can be reliably and stably repaired. Further, the revolving frame provided with the repair device can perform repair work on the repair target portion without falling over in any orientation in the circumferential direction of the furnace by the revolving operation. Further, since the entire repair apparatus of the present invention is suspended in the furnace at two or more locations by a height-adjustable suspension mechanism, for example, a wire rope and a winch, positioning at a predetermined position level in the vertical direction in the furnace is possible. It's easy. Further, even if the weight of the repair device becomes a little heavy, it can be sufficiently supported by the suspension mechanism that is suspended by the suspension frame. Furthermore, since the suspension frame is suspended by a pair of wire ropes at a position equidistant from the center point of its length and at a point equidistant from the furnace top of the out-of-furnace furnace, it can be naturally positioned on the furnace center line. It is ensured that the swivel center position of the swivel frame, which is swivelably suspended in the central portion of the suspension frame, is located on the furnace center line.

(C). By providing a tilting and retracting mechanism on the swivel frame that holds the repair device and a swinging mechanism on the repair device installation part, the swivel frame can perform not only swiveling but also tilting, stretching, and swinging of the tip part. It is possible to fix the suspension frame at a predetermined position level in the furnace, so that a wide range in the vertical direction in the furnace, which corresponds to the circumferential direction of the wall surface of the furnace and the tilting and expansion / contraction of the swivel frame and the swinging range of the tip, The parts can be repaired.

(D). By installing a distance sensor that measures the distance between the repair device and the furnace wall and / or a monitoring device that captures an image of the repair target area in the repair device installation part, the sense of distance and the repair status of the repair target part during repair can be monitored. , The change and adjustment of construction conditions according to the repair status can be remotely operated and controlled in the operation room on the work deck at the top of the out-of-core furnace. As a result, the worker can be freed from a harsh working environment such as dust, noise, heat, toxic gas, etc., and repair efficiency and safety can be improved.

(E). A height-adjustable hanging mechanism,
A suspension frame having expandable and retractable arms at both ends suspended by the suspending mechanism, and a pair of swingable and foldable radius frames having a stretchable arm at the tip whose base end is pivotally supported at the center of the suspending frame. And a revolving frame having a repair device arranged at the tip end thereof rotatably suspended in the center of the suspension frame, a distance sensor for measuring the distance between the repair device and the furnace wall provided in the repair device disposing portion, and / or A monitoring device for photographing the repair target range, a front distance sensor and a tail distance sensor arranged before and after the moving direction of the repair device, and based on the detection distance to the furnace inner wall refractory by the front distance sensor and the tail distance sensor, By providing a repair device control unit that controls the moving speed of the repair device and the surface distance to the furnace inner wall, the damage and adhesion of the furnace inner wall of the repair unit Depending generation situation of a change or adjustment of the repair conditions of the moving speed of the repair device while monitoring the repair status can be remotely controlled, it can be efficiently repaired furnace wall.

(F). Equipped with each sensor such as the height position of the suspension frame, the swivel position of the swivel frame, the tilt angle, the expansion / contraction length, and the distance sensor that measures the distance between the repair device and the furnace wall. By providing a calculation determination device,
It is possible to grasp the profile of the inner wall of the furnace, and to accurately judge the damage condition of the inner wall of the furnace, the condition of deposits and chipping, the finishing condition of removal / smoothing, and the finishing condition of spraying irregular shaped refractory. it can.

(G). By providing the fishing / smoothing device as the repair device, it is possible to remove and smooth the deteriorated portion of the uneven portion of the damaged portion of the furnace wall and the deposit with high accuracy.

(H). By installing a furnace wall spray repair device or furnace wall flame spraying repair device as a repair device, damaged parts of the furnace wall can be repaired by spraying irregular shaped refractory or flame spraying repair of the sprayed material Can be extended.

(I). As a repairing device, by installing a fishing / smoothing device and a furnace wall spraying repair device or a furnace flame flame spraying repair device, it is possible to remove the deteriorated parts and deposits of the uneven parts of the damaged part of the furnace wall with high precision, and then It can be repaired by spraying a fixed refractory or flame spraying repair of a sprayed material, and the durability of the repaired part can be enhanced.

By attaching a spike metal fitting to the tip of the telescopic arm provided on the suspension frame and the radius frame of the present invention, the brick surface of the furnace wall can be easily fixed. Also, the attachment of spike hardware to the end of the telescopic arm is
By using two pins in the horizontal direction and the vertical direction, it is possible to cope with any unevenness or inclination of the brick wall surface.

As the hammer of the chipping / smoothing device of the repair device of the present invention, a single chisel breaker (also called a pick hammer) using compressed air as a power source may be applied, but a multi-axis piston spike Type hammers are preferred. The multi-axis piston spike hammer (hereinafter referred to as "hammer") is driven by compressed air as a power source. A plurality of chisel rods incorporated in the front portion of the hammer at the end of the piston of the flapping portion are hit and the piston Is to randomly project 50 to 80 mm and hit the fishing surface to crush it finely. Compressed air is always contained in the stepped part of the chisel rod, so if you bring it close to the flapping surface, the chisel rod that hit the flapping surface immediately retracts, and is repeatedly hit by the piston and jumps out repeatedly. is there. The features of the hammer are
Since a plurality of chisel rods are randomly ejected to the surface to be trimmed and strike the surface to be trimmed, it is not necessary to strongly press the surface to be trimmed.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to FIGS. FIG. 1 is a side sectional view showing a repair situation in a device of the present invention having a bellless blast furnace equipped with a distribution chute and a distribution chute drive device, and a fishing / smoothing device as a repair device. FIG.
FIG. 3 is a perspective view of a main part of the device of the present invention having a fishing / smoothing device as a repair device, and FIG. 4 is an enlarged side sectional view of a main part of the device of the present invention having a fishing / smoothing device as a repair device. Fig. 5, Fig. 5 is a side sectional view showing a repair situation in the device of the present invention having a lifting / smoothing device and a spray nozzle as a repair device, and Fig. 6 is a furnace wear profile and a lifting / smoothing device and distance of the repair device. FIG. 7 is a plan view of a main part showing the engagement with the sensor, and FIG. 7 is a plan view of the main part showing the engagement between the in-furnace wear profile, the spray nozzle of the repair device, and the distance sensor.
FIG. 8 is a vertical cross-sectional view showing the joint structure of the rotary joint and the slewing ring bearing, FIG. 9 is a view as seen from the arrow BB of FIG. 8, and FIG. 10 is a system configuration diagram of the furnace wall profile detection.

In FIGS. 1 to 4, 1 is a furnace body iron shell,
2 is a furnace top iron shell, 3 is a furnace mouth portion, 4 is a furnace wall brick, 5 is a replacement chute 6 replacement opening provided in the furnace top shell 2 part, 7 is a replacement chute 6 replacement opening 5 A manhole, 8 is arranged on the opposite side of the distribution chute 6. 9
Is a furnace deck, 10 is a furnace inner wall initial profile, 11 is a furnace inner wall wear profile, 12 is a profile after chipping and smoothing, 13 is a chipping range, and 14 is a deposit.

Reference numeral 21 is a suspension frame.
The total length L is set to be smaller than the minimum inner diameter of the furnace, that is, the inner diameter Dt of the furnace opening 3. 22 is a suspension frame 21
, 23, 24 are wire ropes for suspending and suspending the suspension frame 21. The winch 27, 28 installed on the furnace deck 9 through the wire sheaves 25, 26 respectively moves vertically in the furnace. Suspended to be movable. The installation positions of the wire ropes 23, 24 are set in the carrying-in and taking-out directions of the repair device into the furnace, that is, the positions of the replacement opening 5 of the distribution chute 6 and the furnace top iron shell 2 in the diagonal direction. Use the opening position of the manhole 7 for in-furnace inspection. By suspending in this way, the suspension frame 21 can be naturally positioned at an arbitrary height in the furnace on the furnace center line XX.

Reference numeral 31 is a sliding member mounted inside both ends of the suspending frame 21, 32 is an air cylinder housed in the suspending frame 21, 33 is a telescopic arm of the suspending frame 21 to which a sliding member 34 is mounted, and the air cylinder 32 Is operated, the expandable arm 33 is expanded and contracted in the radial direction in the furnace with a smooth movement without play. Reference numeral 35 is a spike metal member having a projection at its tip, which is connected to the telescopic arm 33 by a pin 36 and can freely contact and press against the wear surface of the furnace inner wall. 37
Are a pair of swivel-folding radius frames, which are installed on both sides of the central portion of the suspension frame 21 so as to be horizontally swingable at right angles to the suspension frame 21 by an air cylinder 39 with a support shaft 38 as a fulcrum. 40 is a suspension frame 21
Similarly to the telescopic arm 33, the telescopic arm provided at the tip of each radius frame 37, 41 is a spike metal member connected to the telescopic arm 40 by a pin, and 42 is a stopper. When the radius frame 37 swings in the radial direction, the suspension frame 21 is suspended by the air cylinder 39 and the stopper 42.
And is defined in a position at right angles, the width dimension W ₁ in parallel folded state suspended frame 21, the width W ₀ of the replacement opening 5 of the distribution chute 6 so as to be carried into the furnace
It is made smaller.

Reference numeral 45 is a slewing ring bearing installed at the center point O of the suspension frame 21, and 46 is a pin 47 below the slewing ring bearing 45.
The swivel frame case fixed by 48 is a swivel motor, which is connected to the swivel wheel bearing 45 through a pinion gear 49. When the swivel motor 48 is driven, the swivel wheel bearing 45 is rotated through the pinion gear 49. There is. The swing motor 48 may be an air motor or an electric motor, but a VVVF capable of varying a hammer moving speed of a lifting / smoothing device described later, that is, a swing speed.
A motor or an inverter-controlled electric motor is suitable. Reference numeral 50 is a swivel frame housed in the swivel frame case 46 via rollers 51, and 52 is a swivel frame case 4.
6 is a feed motor, 53 is a feed chain, 54 is a roller, and 55 is a chain stopper provided on the revolving frame. One end of the feed chain 53 is fixed to the chain stopper 55 provided on the revolving frame, and the other end is the revolving frame. When the feed motor 52 is fixed to the rear end of the feed motor 52 and is rotated in the forward and reverse directions, the feed chain 53 and the roller 5
The swivel frame 50 is configured to expand and contract in the axial direction according to the in-furnace radial distance. Reference numeral 56 is a tilting cylinder of the turning frame. When the tilting cylinder 56 is operated, the turning frame case 4 is rotated about the pin 47 as a fulcrum.
6 and the swing frame 50 can freely tilt within a predetermined angle θ.

Reference numeral 57 denotes a chipping device having a multi-axis piston spike type hammer, which is mounted on a bracket 59 attached to the tip of the revolving frame 50 via a pin 58, and a furnace for swinging by a swinging cylinder 60 via a link mechanism 61. It is configured to be swingable so that it can be lifted in an optimal posture such that it is perpendicular to the uneven surface of the inner wall wear profile 11 and the surface of the furnace wall deposit 14. In addition, the height H of the above repair device
Is configured to be sufficiently smaller than the height of the replacement opening 5 of the distribution chute 6 which is the entrance to the furnace. Reference numeral 62 is a balance weight provided at the rear end of the revolving frame 50. The hammer used in the chipping device 57 may be a breaker type hammer having a pit at the tip, but it is not optimal because it needs to be pressed strongly against the chipping surface and the reaction force during chipping is large.

Actuators such as a hanging device 57, a feed motor 52, a swing cylinder 60, and the like, which are installed on the revolving frame 50 below the revolving wheel bearing 45,
Although compressed air is used as a power source, it is also possible to apply an actuator that uses hydraulic pressure and electricity as a power source in addition to the compressed air for the purpose of downsizing and positioning of the device. When installing and repairing this device in a blast furnace that has been downscaled and blown off, an actuator that uses compressed air as a power source by applying measures such as a heat insulating plate in an environment where the atmosphere temperature inside the furnace is high In consideration of the positioning mechanism, it is rather excellent in hot applicability, reliability, and stability of the equipment. Reference numeral 65 is a rotary joint disposed at the center point O of the suspension frame 21, 66 is also a swivel joint, and a flexible hose 67 for supplying compressed air from outside the furnace, a flexible hose 68 for the lifting device 57, and an electromagnetic control for controlling each actuator operation. The control cable 70 of the valve unit 69 is laid along the wire rope 23 of the lifting mechanism, and after reaching the suspension frame 21, it is connected to a predetermined supply port using the pipes 71 and 72.

With the above-mentioned structure, the contents M of the furnace interior are lowered below the target range of chipping of the inner wall of the furnace or the target range of refractory removal, and after entering into so-called scaled down breeze, the repair device of the present invention is applied. Bring it into the furnace. That is,
In a state in which a pair of radius frames 37 swingable about a support shaft 38 are pivoted and folded in parallel with the suspension frame 21,
Wire rope 24 and wire rope 2 from manhole 7
3 is connected to the suspension piece 22 and carried into the blast furnace through the replacement opening 5 of the distribution chute 6 of the furnace top shell 2. Then, operate the winches 27 and 28 to operate the wire ropes 23 and 24.
Then, the suspension frame 21 is suspended and lowered to the target range of the inner wall of the furnace or the target range of refractory removal. Then, the air cylinder 32 is operated to swing the radius frame 37 around the support shaft 38 to the position of the stopper 42, and the suspension frame 21 and the radius frame 37 are formed into a cross shape on a plane. Then, the air cylinder 39 and the like are operated. Since the telescopic arms 33, 40 of the suspension frame 21 and the radius frame 37 are extended and the spike hardware 35, 41 is pressed against the furnace wall brick 4, the inner diameter changes steplessly at the height position like a blast furnace shaft portion, Even if the wall brick 4 is worn and has unevenness,
It can be fixed at a predetermined position level.

Thereafter, the turning motor 48 is driven to rotate the turning wheel bearing 45 via the pinion gear 49, and the flapping device 57 at the tip of the turning frame 50 is made to face the flapping target range or the refractory removal target range. Then, the feed motor 52 is driven to advance the hammer of the stripping device 57 at the tip of the revolving frame 50 to the abutment surface so that the hammer comes into contact with the swinging device 50.
1 is suspended and smoothed so as to obtain the profile 12 after suspension. In this case, the swinging device 57 is contacted by the swinging cylinder 60 with the pin 58 as a fulcrum through the link mechanism 61 at an optimum angle so as to be perpendicular to the uneven surface of the hanging surface and the surface of the attached matter 14. Furnace inner wall wear profile 11 in which the furnace inner wall initial profile 10 is worn
Makes full use of the expansion and contraction of the swing frame 50 by the feed motor 52, the tilting by the tilting cylinder 56, and the swinging motion of the swinging device 57 by the swinging cylinder 60. After the swinging is performed within the range from a to b in FIG. It is flattened like the profile 12 of. In the horizontal section of the furnace body in FIG. 2, the swivel frame 50 is swung clockwise, and the furnace inner wall wear profile 1 is worn and uneven.
1 shows a state in which the surface is flattened by 1 to be the profile 12 after the chipping. In addition, the range of B in FIG. 2 shows a state in which a furnace wall repair panel P such as a fired refractory panel or a water-cooled metal panel is arranged on the surface of the profile 12 after the flattening. By repeating the above operation,
The furnace inner wall wear profile 11 can be a smoothed profile 12 after chipping.

In FIGS. 5 to 10, reference numeral 81 designates an irregular refractory material spraying nozzle mounted on the tip of the revolving frame 50 and above the slinging device 57, which is flexible for hanging the irregular refractory material supply hose 82 from outside the furnace. In addition to the hose 68, it is laid along the wire rope 23 of the elevating mechanism, and the irregular refractory spray nozzle 81 is provided with the irregular refractory through the rotary joint 65 and the swivel joint 66 installed in the center of the suspension frame 21. F is supplied. 83 is a manifold of the rotary joint 65 installed in the center of the suspension frame 21, fixed to the lower part of the suspension frame 21,
The rotary shaft 84, which is an axial center portion, is rotationally driven by the turning motor 48 through the pinion gear 49 together with the lower portion of the turning wheel bearing 45. Reference numeral 85 is a hollow hole that penetrates the rotary shaft 84 to form a passage for an indefinite refractory material,
The irregular-shaped refractory supply hose 82 is connected via the swivel joint 66 to the regular-shaped refractory spray nozzle 81 on the downstream side of the rotary joint 65 by the supply hose 86. 87,
Reference numerals 88, 89, 90, 91, and 92 denote a tilting cylinder 56 mounted on the revolving frame 50 from a solenoid valve unit 69 connected to a flexible hose 67 for compressed air supplied from outside the furnace and a control cable 70, and a swinging head. A total of 6 ports of piping 71 for supplying and discharging compressed air to the cylinder 60 and the feed motor 52 are introduced into each connection groove 94 defined by the O-ring 93 of the manifold 83, and at the bottom of the rotary shaft 84. Each port 95, 9
6, 97, 98, 99, 100, and is connected to a tilting cylinder 56, a swing cylinder 60, and a feed motor 52 via a flexible hose (not shown). Reference numerals 101 and 102 denote bearings that support the upper and lower sides of the rotary shaft 84, and 103 O-rings that prevent compressed air from leaking between the connection grooves 94 during rotation.
Reference numeral 4 is an O-ring for preventing dust from entering. Reference numeral 105 denotes a hollow hole of the rotary shaft 84, which forms a passage of compressed air for driving the hammer of the stripping device 57, and is connected from the upstream flexible hose 68 of the rotary joint 65 to the downstream flexible hose 68a. Attached to the hammer.

Reference numerals 106 and 107 denote a sensor mounting bracket 109 of a bracket 108 disposed above the chipping device 57 at the tip of the revolving frame 50, and a chipping device 57 and an irregular refractory installed on the axis centering on the furnace center. A distance sensor that measures the distance between the spray nozzle 81 and the hammer tip of the chipping device 57 mounted on the left and right at a predetermined angle α or the irregular shape refractory spray nozzle 81 and the inner wall surface of the furnace.
Reference numeral 10 denotes an industrial television camera arranged above the hanging device 57. 111 and 112 are wire ropes 23 and 24
Encoders for detecting the ascending / descending position of the suspension frame 50 installed on the wire sheaves 25a and 26a, 113 is an encoder for detecting the rotating position and the rotating speed of the rotating frame 50 installed on the rotating motor 48, and 114 is installed on the rotating frame case 46. An angle transmitter for detecting the tilting angle of the revolving frame 50, and 115 is an encoder installed in the feed motor 52 for detecting the expansion / contraction distance of the revolving frame 50.

The detection values of the encoders 111 and 112 are input to the calculator 116 as shown in FIG. 10, and the average value of the detection values of the encoders 111 and 112 is calculated to determine the height position Z in the furnace. To detect. The detection value of the encoder 113 is input to the calculator 116, and the position R in the circumferential direction in the furnace is calculated.
Is calculated. The tilt angle θ of the turning frame 50 detected by the angle transmitter 114 is input to the calculator 117 and converted into a horizontal distance, and the horizontal position X is determined from the expansion / contraction amount Xa of the turning frame 50 detected by the encoder 115. It The calculator 116 three-dimensionally determines the coordinates of the tip position of the hammer or the amorphous refractory blowing nozzle 81 of the hanging device 57 based on these data Z, R, and X. The coordinate values determined three-dimensionally are calculated by the calculator 118.
Entered in. In addition, the distance between the tip of the hammer of the chipping device 57 or the irregular-shaped refractory spray nozzle 81 and the inner wall surface of the furnace measured by the distance sensors 106 and 107 is calculated by the calculator 1
18 is input. The computing unit 118 is a hammer or an irregular shaped refractory spray nozzle 8 of the hammering device 57 to be input.
The coordinate value of the tip position of No. 1 is configured to calculate the profile of the current position of the inner wall surface of the furnace based on the distance between the tip of the hammer of the hanging device 57 or the irregular-shaped refractory spray nozzle 81 and the inner wall surface of the furnace.

The industrial television camera 110 can photograph a chipping target portion and an amorphous refractory material spraying target portion, and can monitor it with a monitor (not shown) outside the furnace. When the swivel frame 50 swirls and advances in the direction of the arrow in FIG. 6 to move the furnace wall brick 4 to the flat post-hanging profile 12, the computing unit 118 depths d by the distance sensor 106 before the hanging. _From the value of the depth d ₂ by the distance sensor 107 after the ₁ is suspended,
Based on the difference in depth and the average value, the moving speed of the hammer of the hanging device 57 and the hanging depth can be calculated, and the amount of hanging can be controlled. The in-furnace radii D ₁ and D ₂ before and after the chipping of the bricks 4 are calculated by the calculator 118 based on the detection values of the angle transmitter 114 and the encoder 115 installed in the swivel frame 50. Reference numeral 119 is a display.

Further, the computing unit 118 has a distance before spraying when the swivel frame 50 swirls and advances in the direction of the arrow in FIG. 7 to spray and repair the irregular refractory on the four bricks of the furnace wall. The depth e ₁ of the sensor 106 and the distance sensor 10 after spraying
From the value of depth e ₂ of 7, when the spray thickness of the amorphous refractory F is larger than the predetermined thickness by the difference of depth and the average value, the spray turning speed is increased and conversely the amorphous shape is applied. When the sprayed thickness of the refractory material F is less than the predetermined thickness, the spraying turning speed is slowed to control the spraying amount. The in-furnace radii E ₁ and E ₂ before and after the blowing of the furnace wall brick 4 are calculated by the calculator 118 based on the detected values of the angle transmitter 114 and the encoder 115 installed in the swivel frame 50. As the distance sensors 106 and 107, an ultrasonic type, a microwave type, or a laser type can be used, but it is desirable that the distance measurement accuracy is not affected even if the angle formed by the transmitting direction and the wall surface is slightly changed. .

With the above configuration, the suspension frame 21 is fixed at a predetermined height position in the furnace, and the distance frames 106 and 107 and the encoders 111, 112 and 113 are rotated, tilted and expanded and contracted. ,
115 and the detected value of the angle transmitter 114
And calculate the furnace wall profile by
The display 119 such as a Y-plotter can be used for three-dimensional or two-dimensional display. Further, by moving the installation and fixed position of the suspension frame 21, the furnace wall profile at a desired position in the furnace can be measured.

Further, the suspension frame 21 is fixed at a predetermined height position in the furnace, and the swing wall 50 is swung, tilted, and expanded / contracted, while the furnace wall brick 4 is flatly profiled after the chipping 12.
At the time of going to the ground, from the value of the depth d ₁ by the distance sensor 106 before the hanging and the depth d ₂ by the distance sensor 107 after the hanging, which is calculated by the computing unit 118, The moving speed of the hammer of the hanging device 57 and the depth of hanging can be calculated, and the amount of hanging can be controlled while monitoring the hanging surface on the monitor screen of the industrial television camera 110. Further, when the suspension frame 21 is fixed at a predetermined height position in the furnace, and the revolving frame 50 is tilted and expanded / contracted, the arithmetic unit 118 and the like are used when the irregular wall refractory is sprayed and repaired on the furnace wall brick 4 surface. The depth e ₁ of the distance sensor 106 before spraying and the distance sensor 10 after spraying calculated by
From the value of depth e ₂ of 7, when the spray thickness of the amorphous refractory F is larger than the predetermined thickness by the difference of depth and the average value, the spray turning speed is increased and conversely the amorphous shape is applied. When the spray thickness of the refractory F is less than the predetermined thickness, the spray turning speed is slowed down, and while monitoring the spray construction surface on the monitor screen of the industrial TV camera 110, the irregular shaped refractory F The amount of spray can be controlled.

[0040]

As described above, according to the device of the present invention, the following effects can be obtained. (1). By using a suspension frame having a telescopic arm that can expand and contract in the direction of the inner wall of the furnace, the entire apparatus becomes compact and it becomes easy to carry it in and out of the furnace. (2). By combining a pair of swivel-foldable radius frames having a suspension frame and an expandable telescopic arm in a cross shape in a plane, and fixing the suspension frame to the inner wall of the furnace, the repair work can be performed at any orientation of the inner circumference of the furnace. Even if it is, the fall reaction force can be firmly retained. (3). Even if the inner diameter changes continuously in the height direction like in a blast furnace or the inner wall of the furnace changes unevenly, the suspending frame and radius frame telescopic arms can be used at any given position in the furnace. Can be fixed on the level. (4). The revolving frame equipped with repair equipment is revolving,
Since the tilting, expanding and contracting and swinging mechanism of the repairing device section is provided, the repairing device can be brought into contact with the repairing surface at an optimum angle. (5). If a suspending / smoothing device is installed as a repair device, it is possible to remove / smooth the deteriorated part of the uneven portion of the damaged part of the furnace wall and the deposit with high accuracy. (6). If an amorphous refractory spray nozzle or flame spray nozzle is installed as a repair device, the damaged portion of the furnace wall can be repaired with the irregular refractory or thermal spray material. (7). The furnace inner wall profile measuring device and industrial TV camera can quantitatively grasp the damaged portion of the furnace wall, and it is possible to maintain the optimum repair construction conditions even if the shape of the surface to be repaired has changed, and construction efficiency and Safety is improved. Moreover, since the in-furnace profile before and after repair can be quantitatively grasped, accurate and appropriate repair can be performed on the repair target part, which can greatly contribute to the life extension of the blast furnace and the stability of the furnace condition, and its economic effect is great. is there.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a repair situation in a device of the present invention which has a bellless blast furnace equipped with a distribution chute and a distribution chute drive device and a fishing gear as a repair device.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a perspective view of a main part of the device of the present invention having a fishing gear as a repair device.

FIG. 4 is an enlarged side sectional view of an essential part of the device of the present invention having a fishing device as a repair device.

FIG. 5 is a side sectional view showing a repair situation in the device of the present invention having a fishing gear and a spray nozzle as the repair device.

FIG. 6 is a plan view of a main part showing an engagement between an in-furnace wear profile, a chipping device of a repair device, and a distance sensor.

FIG. 7 is a plan view of relevant parts showing the engagement between the in-furnace wear profile, the spray nozzle of the repair device, and the distance sensor.

FIG. 8 is a vertical cross-sectional view showing a joint structure of a rotary joint and a slewing ring bearing.

9 is a view taken along the line BB of FIG.

FIG. 10 is a system configuration diagram of a furnace wall profile detection.

[Explanation of symbols]

1 Furnace Iron Shell 2 Furnace Iron Shell 3 Furnace Port 4 Furnace Wall Brick 5 Opening 6 Distribution Chute 7 Manhole 8 Driver 9 Furnace Deck 10 Furnace Inner Wall Initial Profile 11 Furnace Inner Wall Wear Profile 12 After Lifting and Smoothing Profile 13 Suspended area 14 Adhesion 21 Suspended frame 22 Suspended piece 23, 24 Wire rope 25, 26 Wire sheave 27, 28 Winch 31, 34 Sliding material 32, 39 Air cylinder 33, 40 Telescopic arm 35, 41 Spike hardware 36, 47, 58 pins 37 radius frame 38 support shaft 42 stopper 45 slewing ring bearing 46 slewing frame case 48 slewing motor 49 pinion gear 50 slewing frame 51, 54 rollers 52 feed motor 53 feed chain 55 chain stopper 56 tilting cylinder 57 lift Installation 59, 108 Bracket 60 Swing cylinder 61 Link mechanism 62 Balance weight 65 Rotating joint 66 Revolving joint 67, 68 Flexible hose 69 Electromagnetic valve unit 70 Control cable 71, 72 Piping 81 Amorphous refractory spray nozzle 82 Amorphous Refractory supply hose 83 Manifold 84 Rotary shaft 85 Medium hole 86 Supply hose 87, 88, 89, 90, 91, 92, 95, 96, 9
7, 98, 99, 100 Port 93, 103, 104 O-ring 94 Connection groove 101, 102 Bearing 105 Hollow hole 106, 107 Distance sensor 109 Sensor mounting bracket 110 Industrial TV camera 111, 112, 113, 115 Encoder 114 Angle transmission Units 116, 117, 118 Computing unit 119 Display unit L Suspended frame overall length Dt Furnace opening inner diameter H Machine height M Furnace interior entry F Amorphous refractory W ₀ , W ₁ Width O Center point P Furnace wall repair panel

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location F27D 21/00 A

Claims (9)

[Claims] 1. A height-adjustable suspension mechanism, a suspension frame having telescopic arms at both ends suspended from the suspension mechanism, and a suspension frame which is rotatably suspended at a central portion of the suspension frame. A furnace inner wall repair device for a blast furnace, comprising a revolving frame having a repair device arranged at its tip. 2. A height-adjustable suspension mechanism, a suspension frame having stretchable telescopic arms at both ends suspended by the suspension mechanism, and a base end pivotally supported by a central portion of the suspension frame. Of a blast furnace, which comprises a pair of slewing and foldable radius frames having telescopic arms at the ends, and a slewing frame having a repair device disposed at the ends rotatably suspended at the center of the suspension frame. Furnace inner wall repair device. 3. A furnace inner wall repair device for a blast furnace according to claim 1, wherein the revolving frame holding the repair device has a tilting and retracting mechanism, and the repair device disposing portion has a swing mechanism. . 4. The blast furnace according to claim 1, further comprising a distance sensor for measuring a distance between the repair device and the furnace wall and / or a monitoring device for photographing an area to be repaired in the repair device disposition part. Furnace inner wall repair device. 5. A height-adjustable suspension mechanism, a suspension frame having stretchable arms at both ends suspended by the suspension mechanism, and a base end pivotally supported by a central portion of the suspension frame. A pair of foldable and foldable radius frames having telescopic arms at the ends, a slewing frame having a repair device disposed at the tip rotatably suspended in the center of the suspension frame, and a repair device arranging portion. A distance sensor for measuring the distance between the repair device and the furnace wall and / or a monitoring device for photographing the range to be repaired, a front distance sensor and a tail distance sensor arranged before and after the moving direction of the repair device, and the front distance sensor and tail A repair device control unit that controls the moving speed of the repair device and the face-to-face distance with the furnace inner wall based on the detection distance to the refractory inside the furnace by the distance sensor is provided. Characteristic blast furnace inner wall repair device. 6. A height sensor of the suspension frame, a swing position of the swivel frame, a tilt angle, an extension / contraction length, and a distance sensor for measuring the distance between the repair device and the furnace wall, and the profile of the inner wall of the blast furnace is obtained from these measured data. The blast furnace inner wall repairing device according to claim 5, further comprising a calculation determining device for calculating the above. 7. The furnace inner wall repair device for a blast furnace according to claim 1, wherein the repair device is a chipping / smoothing device. 8. The blast furnace inner wall repairing device according to claim 1, wherein the repairing device is a furnace wall spraying repairing device or a furnace wall flame spraying repairing device. 9. The blast furnace inner wall repairing device according to claim 1, wherein the repairing device is a chipping / smoothing device, a furnace wall spraying repairing device, or a furnace wall flame flame spraying repairing device.