JP3267798B2 - Blast furnace runner repair machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace runner repair machine for repairing a damaged portion of a refractory material of a blast furnace runner.

[0002]

2. Description of the Related Art FIG. 9A is a sectional view showing a blast furnace runner A.
FIGS. 3B and 3C are cross-sectional views each showing a state where a damaged portion of the refractory material is repaired. As shown in FIG. 9 (A), a refractory material 1 is coated on the side and bottom surfaces of the blast furnace runner A. The refractory material 1 is worn or collapsed by the hot water when the hot water is flowed several times. It needs to be repaired because it is damaged. Conventionally, if there is enough time to repair, after removing a certain range of severely damaged refractory material 1 with a hydraulic breaker, as shown in FIG. And a concrete-like refractory material 1 is poured in and hardened for repair.
When urgent repair is required, as shown in FIG. 9C, the refractory material 1 pumped from the compressor 3 by the hose 4a and the water pumped by the hose 4b are mixed at the hose tip. The mud-like refractory material 1 is sprayed to the damaged portion to repair it. Moisture is evaporated by the heat of the wall surface of the mud-like refractory material 1 heated by hot water, and the refractory material 1 adheres to the damaged recess and hardens, thereby performing a partial repair in a short time. Can be.

[0003]

However, in this repair work, high-temperature steam may be blown back to the worker, which is very dangerous. There is a problem that the worker is exposed to a high temperature to perform the work, and a great deal of labor is required for the worker. The repair of the inner wall of the blast furnace is described in, for example,
As disclosed in Japanese Unexamined Patent Publication No. 2-170406, there is a method of controlling the position of the nozzle using a wire to control the position of the nozzle so as to face the inner wall of the furnace wall. Such a repair technique cannot be used when it is necessary to change the repair point along the runner.

The present invention has been made in view of the above circumstances, and eliminates the labor of an operator when partially repairing a damaged portion of a refractory material of a blast furnace runner in a short period of time, and improves the safety of work. It is an object of the present invention to provide a blast furnace runner repair machine capable of performing repair work efficiently regardless of the arrangement of the runner at the work site.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a hydraulic shovel having a horizontal link at a tip end of a boom by a parallel link regardless of whether the boom is up or down.
And a second frame having a horizontal rail is provided on the first frame so as to be rotatable so that a horizontal rotation position can be adjusted by a rotating means, and a horizontal rail of the second frame is provided. A third frame is provided so as to be horizontally moved by the moving means along the axis, and a rotating shaft rotated about the axis by the rotating means is provided in a manner hanging down from the third frame, and a lower part of the rotating shaft is provided. A refractory spray nozzle, and operating means for operating the boom undulation, the second frame rotating means, the third frame moving means, and the rotating shaft rotating means in the cab of the hydraulic shovel. It is characterized by having.

[0006]

According to the present invention having the above-described structure, even when the boom is raised and lowered, the rotating shaft always maintains a vertical posture, and as a result, the rotating shaft on which the nozzle is mounted always maintains the vertical posture.
The second frame is adjusted to the direction along the runner by changing the horizontal rotation position by the rotation means. The longitudinal position of the nozzle for spraying the refractory material is adjusted by operating the moving means of the third frame. The upper and lower positions of the nozzle are adjusted by boom undulation. The direction of the nozzle is adjusted by the rotating means of the rotating shaft. The height, position and orientation of these nozzles in the longitudinal direction of the runner are adjusted by operating the operating means in the cab.

[0007]

FIG. 1 is a side view showing an embodiment of a blast furnace runner repair machine according to the present invention. As shown in FIG. 1, in the blast furnace runner repairing machine of this embodiment, an upper revolving unit 5C is installed on a lower traveling unit 5A via a revolving unit 5B, and a boom 6 is raised and lowered on the upper revolving unit 5C. A hydraulic excavator mounted so as to be able to move up and down around a pin a by a hydraulic cylinder 11 is used as a base machine, and a refractory spraying device 7 is provided at the tip of the boom 6 instead of a bucket. The blast furnace runner repair machine is provided with a heat resistance measure, and is equipped with an air conditioner-operated cab 46 including a condenser 45 mounted on the upper swing body 5C.
Heat insulating material is stuck on the inner surface of the, and asbestos is wrapped around the rubber hoses for piping. A hydraulic unit 37 including a hydraulic pump driven by an engine, an oil tank, a control valve, and the like is mounted on the upper swing body 5C.

The boom 6 has a substantially central bent portion,
The base of the bracket 6a for the parallel link is rotatably connected to the rod end of the hydraulic cylinder 11 by a pin b, and the bracket 6a and the bracket 5d provided on the upper swing body 5C are connected to the link 12 and the bracket 5d. Pins c and d
And a line connecting the pins a, b, c, and d forms a parallelogram, thereby forming a first parallel link.

Further, the spraying device 7 has a first frame 8 as a base thereof attached to the tip of the boom 6 so as to be rotatable up and down by a pin e. The upright bracket 8a and the bracket 6a provided on the boom 6 are connected by a link 13 and pins f, g, and pins b, e,
A line connecting f and g forms a parallelogram, thereby forming a second parallel link. By these parallel links, the first frame 8 of the spraying device 7 always keeps a horizontal posture regardless of the ups and downs of the boom 6. Reference numeral 28 denotes a hose for feeding the refractory material to the spraying device 7, and reference numeral 29 denotes a refractory material spray nozzle attached to the tip of the hose 28. Note that 24
Is a pin 6c on a bracket 6b provided on the lower surface of the boom 6.
The stand for supporting the boom 6 is fixed to the lower surface of the boom 6 by a stopper 27 as shown by a two-dot chain line during the refractory material spraying work, and the stand 24 during the work stoppage.
To support the boom 6 and the spraying device 7.

Next, details of parts other than the first frame 8 of the spraying device 7 will be described. 2 (A) is an enlarged side view showing the spraying device 7, FIG. 2 (B) is a view taken in the direction of the arrow Z in FIG. 2 (A), and FIG. 2 (C) is a rail and vertical axis of the second frame of the spraying device 7. FIG. 3 is a cross-sectional view showing an engagement structure with a roller, FIG. 3 is a plan view of the spraying device 7, and FIG. 4 is a rear view thereof. In FIG. 1 to FIG. 4, reference numeral 9 denotes a second frame which is attached to a front portion of the first frame 8 by a pin 14 so as to be rotatable in the left-right direction. The second frame 9 welds the substrate 9a so as to be perpendicular to the front surface of the pin boss 9d penetrating the pin 14, and fixes U-shaped horizontal rails 9b, 9b on the upper and lower sides of the substrate 9a with bolts.
Side rails 9c, 9c are fixed to the left and right ends of the rails 9b, 9b with bolts to form a rectangular shape. Reference numeral 15 denotes a hydraulic cylinder as rotating means for rotating the second frame 9 about the pin 14 to adjust the horizontal rotating position of the second frame 9, that is, the horizontal rails 9b, 9b. Reference numeral 15 denotes a rod-side tip pinned to a bracket 9e provided on the second frame 9, and a tube-side end pinned to a bracket 8b provided so as to extend in the horizontal direction on the first frame 8.

Reference numeral 10 denotes a box-shaped third frame. The third frame 10 is provided above and below a vertical substrate 10a on the back surface, as shown in FIGS. 2 (A), (C) and FIG. A pair of horizontal axis rollers 10b and a pair of vertical axis rollers 10c are provided,
These are rotatably engaged with the upper and lower rails 9b, 9b. Numeral 16 denotes a double rod type hydraulic cylinder provided as a means for moving the third frame 10. As shown in FIG. 4, the hydraulic cylinder 16 connects the tube 16 a to the substrate 9 a of the second frame 9 by bolts 48. Guide members 17 are respectively fixed to the distal ends of rods 16b, 16b integral with each other and protruding from both sides of the tube 16a.
Is installed. The guide member 17 has wheels 17c, 17c mounted on the upper and lower sides of a main body 17a on which a pulley 17b is mounted horizontally. 9
f and 9f so as to be able to roll freely. As shown in FIG. 3, the pulley 17b of the guide member 17 on the right side in FIG.
, A chain 18 having one end connected to the substrate 9a of the second frame 9 is looped around, and the other end of the chain 18 is connected to the substrate 10a of the third frame 10. A chain 19 having one end connected to the substrate 9a of the second frame 9 is wrapped around the pulley 17b of the left guide member 17, and the other end of the chain 19 is attached to the substrate 10a of the third frame 10. Connected to the adjuster 10d. Therefore, the third frame 10 moves left and right by moving the rod 16b of the double rod type hydraulic cylinder 16 left and right.

In FIG. 2A and FIG. 3, reference numeral 21 denotes a rotating shaft attached to the third frame 10 in a hanging manner, and reference numeral 20 denotes a means for rotating the rotating shaft 21 by 360 degrees in the third frame 10. The hydraulic motor 20 has its output shaft 20a vertically projecting downwardly from the third frame 10 via a bracket 22 having bearings 22a and 22b, and the tip end of the output shaft 20a. The rotary shaft 21 having a columnar shape is mounted on the rotary shaft 21, and a nozzle holder 23 for mounting a refractory material spraying nozzle 29 is mounted on the rotary shaft 21. The nozzle holder 23 has an upper clamp 23b attached to a base 23a fixed to a lower portion of the
5 so as to be rotatable in the front-rear direction.
3b, the lower clamp 23c is attached with a bolt 41, and the blowing nozzle 29 is interposed between the upper clamp 23b and the lower clamp 23c to tighten the bolt 41.
It has a structure for fixing the nozzle 29. Numeral 26 denotes an angle adjuster of the spray nozzle 29. The angle adjuster 26 is connected to one end of the screw rod 26b by the upper clamp 23b.
, A screw rod 26b is fitted inside a cylindrical adjuster body 26a rotatably mounted on a base 23a of the holder 23 by a pin 26d, and nuts 26c arranged on both sides of the adjuster body 26a are screwed. Rod 2
6b, the nut 26c is loosened, and the screw rod 26b is slid with respect to the main body 26a.
The structure is such that the nuts 26c on both sides of the nozzle a are fixed to the main body 26a to fix the spray nozzle 29 in a state where the vertical direction of the nozzle 29 is in a predetermined direction.

FIG. 5 is a plan view showing the arrangement of operating means provided in the operator's cab 46 of the embodiment. The blast furnace runner repair machine of the present embodiment has the operator's cab 46 with the second frame 9 An angle adjusting pedal 31, a left / right sliding operation of the third frame 10 and a left / right turning operation lever 32 of the upper revolving unit 5C, a left / right rotation operation of the rotary shaft 21 and a vertical operation lever 33 of the boom 6 are provided. ing. The lever 32
Can be operated in the front-rear and left-right directions, the upper revolving superstructure 5C is controlled by the front-rear operation, and the third frame 10 is controlled by the left-right operation. The boom 6 is controlled by an operation, and the hydraulic motor 20 is controlled by an operation in the left-right direction. Also,
Reference numerals 30A and 30B denote left and right traveling operation pedals of the lower traveling body 5A, and reference numeral 34 denotes an operation seat.

FIG. 6 is a hydraulic circuit diagram of the spraying device 7 of the embodiment. In FIG. 6, 7X is a control valve for controlling the hydraulic cylinder 15 for adjusting the angle of the second frame 9. The control valve 7X is a hydraulic pump 35 and the second control valve.
The frame 9 is provided in a pipeline connecting the hydraulic cylinder 15 as a rotating means, and is configured to be switched by operating the pedal 31 (see FIG. 5). Reference numeral 7Y denotes a control valve for controlling the hydraulic cylinder 16 for the left and right sliding operation of the third frame 10, and the control valve 7Y.
Is inserted into a conduit connecting the hydraulic pump 36 and the hydraulic cylinder 16, and the control valve 7 Y and the hydraulic cylinder 16
A speed adjusting means consisting of a parallel connection line of a check valve 38 and a variable throttle valve 39 is inserted into the reciprocating line, and the control valve 7Y is turned off by operating the lever 32 (see FIG. 5) in the left-right direction. It is configured to be replaced. Also, 7
Z is a control valve for controlling the rotation of a hydraulic motor 20 for rotating the rotary shaft 21 to which the nozzle 29 is mounted. The control valve 7Z is connected to a pipe connecting the hydraulic pump 36 and the hydraulic motor 20. Between the control valve 7Z and the hydraulic motor 20, a speed adjusting means comprising a parallel connection line of a check valve 38 and a variable throttle valve 39 is inserted into the reciprocating line, and the lever 33 (FIG. (See FIG. 1) in the left-right direction to switch the control valve 7Z.

FIG. 7 is a side view showing a state in which a damaged portion of the refractory material of the runner is repaired by using the blast furnace runner repair machine of the present embodiment.
FIG. 8 is a view taken in the direction of the arrow Y in FIG. As shown in FIGS. 7 and 8, when using the blast furnace runner repair machine, a hose 4 a for supplying the refractory material 1 from the compressor 3 and a hose 4 b for supplying water are connected to the hose 28, The mud-like refractory material 1 mixed with water is ejected from the nozzle 29 by a hose 28, and the vertical direction of the nozzle 29 is adjusted by the angle adjuster 26 so that the nozzle 2
9 is adjusted in a suitable direction. Then, the operator operates the traveling operation pedals 30A and 30B of the lower traveling body 5A to position the blast furnace runner repair machine near the runner where the refractory material is damaged. Further, the lever 32 is operated back and forth to change the direction of the upper swing body 5C, and the lever 33
Is operated to move the boom 6 up and down so that the spraying device 7 at the tip of the boom 6 is positioned above the damaged portion of the refractory material of the runner.

In this state, the pedal 31 is depressed forward (or backward) in order to adjust the direction of the second frame 9 to the direction of the runner A. As a result, the control valve 7X is switched from the illustrated neutral position to the right (or left) position, the hydraulic cylinder 15 is extended (or contracted), and the direction of the second frame 9 is changed as shown in FIG. It can be adjusted to the direction of the runner A.

Then, the lever 32 is moved right (or left).
In the direction. As a result, the control valve 7Y is switched from the neutral position shown to the right (or left) position, and hydraulic oil is supplied to the left (or right) chamber of the hydraulic cylinder 16 in FIG. The third frame 10 moves to the right (or left) direction, the nozzle 29 moves to the right (or left) direction, and the left and right positions of the nozzle 29 are adjusted.

From this state, the refractory spray nozzle 29
Is turned to the left (or right) direction, the lever 33
Tilt right (or left). As a result, the control valve 7Z is switched from the illustrated position to the right (or left) position, and the hydraulic motor 20 rotates in the right (or left) direction, via the holder 23 to the rotating shaft 21 attached to the hydraulic motor 20. The attached nozzle 29 rotates in the left-right direction, and faces the target repair location.

Further, the boom 6 is raised and lowered and the nozzle 29
Adjusting the height of the spraying work. At this time, the first frame 8 is always kept in a horizontal posture by the parallel links composed of the links 12, 13 and the like, so that the rotating shaft 21 of the spraying device 7 moves up and down while maintaining the vertical posture.

In this way, in this blast furnace runner repair machine, the operator operates the operator's cab to position the spray nozzle 29 of the refractory spray device 7 provided at the tip of the boom 6 in the vertical and horizontal directions. The spray nozzle 29 can be directed to the broken portion of the refractory material of the runner by changing the direction of the spray nozzle. Therefore, the repair work of the refractory material damaged portion can be performed safely, and the worker can perform the work without being exposed to a hot environment and with a reduced number of workers. Also, after aligning the nozzle 29 with the center of the runner A,
The boom 6, the second frame 9, and the third frame 10 are moved while the lower traveling body 5A and the upper swing body 5C are stopped, and the hydraulic motor 20 is rotated, so that the spray nozzle 29 The height, the position in the left-right direction, and the direction in the left-right direction can be changed, so that it is possible to perform repairs over a wide range of the runner while the hydraulic shovel is fixed, as is apparent from FIG. Work can be performed efficiently without moving the excavator. Further, even in a place where the excavator cannot move due to the presence of an obstacle near the runner, as shown in FIG. 8, the second frame 9 is horizontally rotated with respect to the excavator so as to be inclined. By setting the orientation in a different direction, the work can be performed in a state adapted to the work site, and the suitability for the work site is enhanced.

[0021]

According to the present invention, a rotary shaft is attached to the tip of a boom of a hydraulic excavator by using a parallel link so as to maintain a vertical posture regardless of the boom undulation, and a nozzle is mounted on the rotary shaft. None, the upper and lower left and right positions of the nozzle, and the left and right directions are adjusted by operating from the cab,
Since the nozzle can be directed to the damaged portion of the refractory material, the repair work of the damaged portion of the refractory material can be performed safely and without the labor of exposing the worker to a hot environment. Labor saving is achieved. Also,
Horizontally moving the nozzle by adjusting the horizontal rotation angle of the second frame with respect to the excavator so that the second frame follows the runner and laterally moving the third frame along the rail of the second frame. This makes it possible to repair a wide range of damaged refractory material while keeping the position of the excavator fixed, thus reducing the frequency of movement of the excavator,
Work can be performed with high efficiency. In addition, since the direction of the second frame can be changed, the work can be performed even in a place where there are many obstacles, which is highly suitable for a work site.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a blast furnace runner repair machine according to the present invention.

FIG. 2A is a partial cross-sectional side view showing a spraying device of the blast furnace runner repair machine of the embodiment, FIG.
(C) is a sectional view showing an engagement structure between the rail of the second frame and the longitudinal axis roller of the embodiment.

FIG. 3 is a plan view of the spraying device.

FIG. 4 is a rear view of the spraying device.

FIG. 5 is a plan view showing an arrangement of operating devices of a cab of the blast furnace runner repair machine of the embodiment.

FIG. 6 is a hydraulic circuit diagram of the blast furnace runner repair machine of the embodiment.

FIG. 7 is a side view showing a state in which a damaged portion of the refractory of the runner is corrected using the blast furnace runner repair machine of the present embodiment.

8 is a view as viewed in the direction of the arrow Y in FIG. 7;

FIG. 9A is a sectional view showing a blast furnace runner, FIG.
(C) is sectional drawing which shows the state which repairs the damaged part of each refractory material by the prior art.

[Explanation of symbols]

 A Runner 1 Refractory 3 Refractory compressor 7 Spray device 8 First frame 9 Second frame 10 Third frame 11 Hydraulic cylinder for raising and lowering boom 12, 13 Link 15 Hydraulic pressure for horizontal rotation of second frame Cylinder 16 Hydraulic cylinder for sliding the third frame 17 Guide member 20 Hydraulic motor for rotating the rotating shaft 21 Rotating shaft 28 Hose 29 Nozzle for spraying 31 Pedal for adjusting the angle of the second frame 32 Lever for left and right sliding and turning operation 33 Nozzle Rotation and up / down operation lever

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shoichi Sakaguchi 37, Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Tsurumi Stone Materials Industry Co., Ltd. (72) Inventor Akio Shimomura 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan (56) References JP-U 1-176157 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C21B 7/14 F27D 1/16 E02F 3/36

Claims (1)

(57) [Claims] 1. A horizontal link is provided at a tip end of a boom of a hydraulic excavator by a parallel link regardless of the boom up / down.
And a second frame having a horizontal rail is provided on the first frame so as to be rotatable so that a horizontal rotation position can be adjusted by a rotating means, and a horizontal rail of the second frame is provided. A third frame is provided so as to be horizontally moved by the moving means along the axis, and a rotating shaft rotated about the axis by the rotating means is provided in a manner hanging down from the third frame, and a lower part of the rotating shaft is provided. A refractory spray nozzle, and operating means for operating the boom undulation, the second frame rotating means, the third frame moving means, and the rotating shaft rotating means in the cab of the hydraulic shovel. A blast furnace runner repair machine characterized by comprising: