JPH0640798U - Spray repair equipment around the blast furnace tap hole - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to eliminate the harsh environment for the human body when repairing the area around the taphole of a blast furnace. [Structure] A base 4 is attached to the tip of the mud gun to hold and irregularly position the irregular-shaped refractory spray nozzle 6 in the recess around the taphole, and the base 4 is sprayed onto the base 4. The nozzle 6 is attached via a position / orientation adjusting mechanism 5 having three axes and three degrees of freedom, and the spray nozzle 6 is supported so as to be able to move back and forth, rotate, and tilt.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spray repair device for repairing a deteriorated area around a taphole of a blast furnace.

[0002]

[Prior art]

 Generally, the casting floor equipment that extracts the molten pig iron that has fallen in the pool of blast furnace from the taphole to the outside of the furnace is a taphole, an opening machine that opens the taphole, a mud gun that closes, and a molten pigtail. It is composed of flowing gutters. The tap hole is opened after a time when the melting inside the blast furnace is sufficiently progressed and a predetermined amount of tap metal is possible, and is closed after tapping the predetermined amount.

In the process of repeating the opening blockage or in the melting process in the normal blast furnace, the gas pressure around the taphole rises and a large pressure fluctuation due to the blockage causes a blast furnace taphole. If the surface is cracked, roughened, or partially displaced from the surface-moving material, the filler will leak between the tip surface of the mud gun barrel and the tapping surface during the tapping operation. Further, since the mud gun is repeatedly crimped to the taphole surface, a large recess is formed at the taphole.

Conventionally, in such a case, the taphole is disassembled with a rotary blade type chamfering device or a breaker, and a refractory for repair is manually applied to the same part, or a frame is formed in the part and the refractory is poured into the part. The blast furnace tap hole is formed through the drying process for a long time

[0005]

[Problems to be solved by the device]

 However, since the repair work on the deteriorated part of the taphole at the blast furnace is a work near the taphole, the human body is exposed to high heat and gas, which is dangerous and heavy labor. On the other hand, there is a blast furnace tap hole frame forming method disclosed in Japanese Patent Laid-Open No. 57-9809. This is because the mold is set at the tip of the mad gun and it faces the front of the tap hole to form a space between the wall surface around the tap hole and the mold, and the flowable amorphous refractory is poured into this space. Although this is a method of solidifying after that, the disadvantages are (1) the work of pouring the fluid refractory into the form, and (2) the form that covers the surrounding wall surface needs to be set. , The heavy labor involved in this work will not disappear.

The object of the present invention is to eliminate the above-mentioned drawbacks, eliminate a harsh environment for the human body, and more easily repair a deteriorated part of the blast furnace tap hole, so that the blast furnace tap hole peripheral part can be repaired. Is to provide.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the spray repair device around the taphole of the blast furnace of the present invention uses a mudgun to hold the spray nozzle and perform standard positioning with respect to the depression around the taphole. A base part attached to the tip, a three-axis three-degree-of-freedom adjustment mechanism provided on the base part, and an irregular-shaped refractory spray nozzle supported by the adjustment mechanism so that the base part can be moved back and forth, swung, and tilted. It is composed of and.

[0008]

[Action]

 When spray repair is performed on the depression around the taphole, the base of this repair device is attached to the tip of the mud gun. This makes it possible to use the mud gun to hold the spray nozzle in the depression around the taphole and perform reference positioning. Further, the irregular refractory spray nozzle can be adjusted in the front-rear position and the aiming angle by the forward / backward movement, turning, and tilting movement of the adjusting mechanism, so that the desired spray repair can be performed.

[0009]

【Example】

 Hereinafter, the present invention will be described based on an embodiment shown in the drawings. In FIGS. 1 and 2, 1 is a mud gun, and 2 is an entire repairing device attached to a tip 3 of a tip of the mud gun. The repairing device 2 includes a base 4 having one end 4a attached to the tip of the mud gun, a three-axis three-degree-of-freedom position / orientation adjusting mechanism 5 provided so as to rise from the other end 4b of the base, and the adjusting mechanism 5. It is provided with an irregular shaped refractory material spraying nozzle 6 mounted on the upper part thereof, and the irregular shaped refractory material spraying nozzle 6 can be moved back and forth, swung, and tilted with respect to the mud gun 1.

More specifically, the repair device base portion 4 has an insertion hole 41 as an attachment portion to the tip of the mud gun at one end side, and the insertion hole 41 is fitted and fastened to the tip barrel tip 3 of the mud gun 1. It is coaxially attached to the mud gun 1 by rubbing. The adjustment mechanism 5 has a support base 9 rotatably supported by a shaft 8 on the top of a support column 7 that is erected on the other end side of the repair device base 4. The lower surface of the support base 9 is connected by a connecting rod 12 to an actuating piece 11 which is rotationally displaced by a drive motor 10 provided on the other end 4a side of the repair device base 4, and by these members 7 to 12, the front-rear operation part is formed. A is configured.

A swivel base 14 is supported on the upper surface of the support base 9 by a rotary shaft 13 which is upright on the surface, and the swivel base 14 is driven by a drive motor 15 mounted on the support base 9 via a gear 16. It is turned. Therefore, these members 13 to 16 form the turning portion B.

A mounting stand 19 having a rack 17 and segment teeth 18 meshing with the rack 17 is provided on the swivel base 14, and a holder 20 of the irregular-shaped refractory spray nozzle 6 is tiltably attached to the stand. There is. Therefore, these members 17 to 20 form the tilting portion C. In short, the forward / backward movement part A, the swiveling part B, and the tilting part C constitute an adjusting mechanism 5 for adjusting the front / rear position and the aiming angle of the irregular refractory spray nozzle 6.

Next, a procedure for performing repair will be described with reference to FIG. (1) As shown in FIG. 2, the repair device 2 mounted on the carriage 21 as shown in FIG. 1 is mounted on the tip cylinder tip 3 of the mud gun 1 as shown in FIG. It should be noted that this mounting work is performed at the storage position of the carriage 21. Here, the carriage 21 may be provided with a lifting mechanism such as a hydraulic cylinder or an electric motor for retracting after mounting or adjusting the mounting height, for example, as shown in FIG.

(2) The mud gun 1 is swung to move the repair device 2 to the front of the blast furnace tap hole 22, and the positioning of the repair device 2 as a reference is performed. Here, the repair device 2 is exposed to the front of the tap hole 22.

(3) Position and position the spray nozzle 6 so that the spray nozzle 6 correctly faces the tap hole 22. That is, by operating the drive motors 10 and 15 of the front-rear operation part A, the swivel part B, and the tilting part C of the adjusting mechanism 5, the spray nozzle 6 directly faces the depression of the deteriorated part around the taphole 22. Adjust the front-rear position and aiming angle.

(4) A refractory material supply device (not shown) is activated to perform spray repair. That is, the spray nozzle 6 sprays an irregular shaped refractory material to the depression of the peripheral deterioration portion of the tap hole 22, and performs the spray repair while adding the lateral and vertical swing operations of the spray nozzle 6 as necessary. . At that time, the spray amount is set larger than the depression of the tap hole 2 by a required amount.

(5) After the repair is completed, the mud gun 1 is swung to the retracted position and retracted.

(6) The repair device 2 is pulled out by running the carriage 21 on the rail, and is removed from the tip 3 of the mud gun 1. After this, the above-mentioned spraying part is promptly pressure-bonded and molded by the mud gun 1 and solidified through a drying process for a required time to form a repaired blast furnace tap hole peripheral part.

[0019]

[Effect of device]

 As described above, according to the present invention, the irregular-shaped refractory for the periphery of the taphole of the blast furnace can be obtained without the need for manual work such as conventional hand painting / casting, handling and setting of forms and jigs. It is possible to repair by spraying. Therefore, the worker can be freed from high heat, dust, and heavy muscle work, and the repair work can be made comfortable or labor saving.

[Brief description of drawings]

FIG. 1 is a diagram showing a repair device according to an embodiment of the present invention before being attached to a mud gun.

FIG. 2 is a view showing the repair device of FIG. 1 mounted on a mud gun.

FIG. 3 is a diagram showing a repair procedure of the repair device of FIG.

[Explanation of symbols]

 1 mud gun 2 repair device 3 tip of mud gun 4 base 4a one end 4b the other end 5 position and attitude adjustment mechanism 6 irregular shaped refractory spray nozzle 7 support pillar 8 shaft 9 support base 10 drive motor 11 operating piece 12 connecting rod 13 rotating shaft 14 turning Platform 15 Drive motor 16 Gear 17 Rack 17 Segment teeth 19 Mounting stand 20 Holder 21 Bogie 22 Blast furnace tap hole 23 Hydraulic cylinder 41 Insertion hole as a mounting part A Front-rear working part B Swing part C Tilt part

Claims (1)

[Scope of utility model registration request] 1. A base mounted on the tip of a mud gun for holding and spraying a spray nozzle to a recess in the periphery of a taphole using a mud gun, and a triaxial three-degree-of-freedom provided on the base. An apparatus for spraying and repairing a peripheral portion of a taphole of a blast furnace, comprising an adjusting mechanism and a nozzle for spraying an indefinite refractory material supported by the base through the adjusting mechanism so as to be able to move back and forth, swivel, and tilt. .