JPS5943524B2 - Blast furnace furnace wall hot repair equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blast furnace wall hot repair device, and particularly to a hot repair device that allows repair work to be carried out from inside a blast furnace in a hot state without completely stopping the blast furnace. be.

Generally, during blast furnace operation, at the end of the furnace life, the furnace wall supports fall off or wear out locally, and a large load is placed on the steel shell in that area, resulting in problems such as cracks in the steel shell and gas leaks. do.

This leads to a situation in which the operating rate or operation rate of the blast furnace decreases, so it is necessary to repair the furnace wall as soon as possible.

Conventional furnace wall repairs can be broadly divided into the following two methods.

(Method A): The blast furnace operation is completely stopped, and after the furnace body has cooled down, workers enter the furnace to perform repair work, and the operation is resumed after drying and heating of the refractories is completed.

(Method B): The damaged part of the blast furnace wall is opened from the outside, a press-in nozzle is inserted through this opening, and a monolithic refractory of an appropriate viscosity is press-fitted at the required pressure, followed by drying and solidification. No. 20702).

However, method A requires a long time to repair because the work is carried out after the furnace body has completely cooled, the adverse environment has a significant impact on the human body, and it is difficult to restart blast furnace operations smoothly. There are drawbacks such as extremely large industrial losses.

In addition, although method B has the advantage of being able to repair the furnace wall without stopping blast furnace operation, it also involves opening a healthy shell and press-fitting the monolithic refractory material from the outside, so it is possible to repair the damaged part of the furnace wall. It has the disadvantage that repairs will be useless unless the damage condition, location, etc. are accurately determined.

Therefore, as a means to solve the above-mentioned problems, the present applicant first proposed Japanese Patent Application Laid-Open No. 55-40409.

That is, as shown in FIG. 1, a guide frame 1 is passed across the furnace mouth, a cart 2 is installed on the guide frame 1, and a telescopic and pivotable pole 3 is disposed on the cart 2.

This pole 3 is suspended in the furnace, and a spray nozzle 4 is connected to the lower end thereof, and a driving source located outside the furnace is operated to automatically spray and form the furnace inner wall 5.

The present invention aims to further improve the automatic spraying machine of the above invention, simplify the device, and shorten the working time.

Next, the present invention will be explained based on embodiments shown in the drawings.

FIG. 2 shows the device of the present invention assembled and used in a furnace.

In the figure, reference numeral 6 denotes a rail that faces the furnace core and extends to the vicinity of the intake opening at the rim of the furnace mouth. ing.

At this time, the traveling drive source 10 is installed on the truck γ.

Next, the cart 1 is formed to be long as shown in the figure, and its tip is formed in a cantilevered structure so that it can enter deeply into the furnace.

Note that the truck 7 does not necessarily have to be long, and a long frame may be separately mounted on the truck 7, and this long frame may be formed so that it can enter the furnace.

This cart 7 is provided with a center pole 11, a spray nozzle 12 is attached to the tip of the pole 11, and further,
The truck 7 is also equipped with various driving sources.

Next, these configurations will be explained in detail.

First, the center pole 11 is made of various types of tubes and is formed to be expandable and retractable.

This expansion/contraction (elevating and lowering) operation is performed by connecting the wire rope 13 to the lowermost pipe of the center pole 11 (see Figure 3), passing through the inside of the pipe to the winding drum 3 of the pole lifting/lowering drive device.
8 and is driven.

The upper end of the center pole 11 is attached to the truck 7 via a tilting shaft 14 so as to be tiltable.

To explain the tilting means, a wire rope 16 is connected to a pole guide 15 provided at the top of the center pole 11. It is connected to the winding drum 18 of the pole tilting drive source.

Next, the tip of the center pole 11 is sprayed with nozzle 1.
2 is rotatably (tiltably) attached via a rotating shaft 19.

As shown in the figure, as for the rotation mechanism, a wire rope 20 is connected to the tip of the nozzle, passes through the side wall of the pole 11, is guided inside the pole at the upper part of the pole 11 by a pulley, etc., and is further passed through the inside of the trolley T. , for nozzle tilting, and connected to the winding drum 21 of the drive source.

Further, for spraying, the material is guided to the nozzle 12 by a hose 22 from a feeder installed outside the furnace.

Furthermore, the center pole 11 is rotatable so that the nozzle 12 can be moved in the circumferential direction of the furnace wall 23.

To explain the turning mechanism with reference to FIG.
can be conveyed to.

At this time, the pole guide 15 is free to rotate relative to the center pole 11, and has a structure that does not hinder the rotation of the pole when the pole turns.

Furthermore, the center pole 11 configured as described above must be tilted during loading and unloading, but at that time, the bevel gear 2
7 tilts integrally with the center pole 11 around the tilting shaft 14, the swing drive shaft 25 can be separated at the coupling 26, and the swing drive shaft 25 can move in the axial direction.

In this case, for example, the swing drive shaft 25 is integral with the housing 26 and moves guided by a guide 27.

Next, details of the swing drive section 24 will be explained with reference to FIG. 4.

The movement of the shaft 25 for attaching and detaching the coupling 26 of the swing drive shaft 25 is performed by a screw mechanism by rotating the bundle 33 which is integrated with a nut.

That is, the turning drive shaft 25 has a screw 3 that engages with the nut.
4 is engraved.

The rotation drive shaft 25 is driven (swivel operation) by a rotation motor 28.
, the small gear 30 is rotated by the reducer 29, this rotation is transmitted to the large gear 31, and the rotation drive shaft 2 is rotated by the sliding key 32.
5.

By the way, in the above configuration, when the swing drive shaft 25 is moved forward to engage the coupling 26, it cannot be said that the engagement state is necessarily obtained by moving to the engagement position.

Therefore, in the present invention, as shown in the figure, the swing drive shaft 25 is passed through a casing 35 that is integrally formed with the large gear 31, and the swing drive shaft 25 and the large gear 31 are interlocked via a sliding key 32. , Furthermore, the screw 34 of the swing drive shaft 25
An adjustment bundle 33 is screwed onto the casing 35, and the adjustment bundle 33 is supported by the casing 35 by the repulsive force of a spring 36 inserted into the casing 35 under pressure.

Therefore, first, when connecting the coupling 26, when the bundle 33 is turned, the swing 1 drive shaft 25 is moved in the direction of the arrow.

If the peaks of the coupling 26 do not come into contact with each other at that time, if the bundle 33 is turned further, the shaft 25 will not move forward, but the bundle 33 will move to the position 33', the spring 36 will be compressed, and the bundle 33 will be moved to the position 33'. Swivel through drive shaft 2
A compressive force acts on 5.

(Figure 4) The amount of movement of this bundle 33 is made equal to the engagement length, and then the swing motor 28 is driven to rotate the swing drive shaft 25. When the bundle 33 has turned to the engagement position, the bundle 33' The meshing state is obtained by returning from the position to the position 33.

With this mechanism, the engagement of couplings that are inside the furnace and cannot be visually checked can be carried out extremely easily and reliably by the drive section outside the furnace.

Bundle operations can be automated rather than manual.

The manufacturing procedure of the present invention having the above structure will be explained with reference to FIG.

In the standby state outside the furnace, the center pole 11 is in a horizontal state, and as described above, in this state, the coupling 26 of the swing drive shaft 25 is disengaged.

(Fig. 5 A) First, after opening the charging port 31,
1 is run horizontally and stopped just before the tip of the pole comes into contact with the furnace wall 23.

In this state, the center of the tilting shaft 14 is located inside the furnace from the charging port, and the center pole 11 is tilted to an angle that does not interfere with the charging port.

(Figure 5) Next, a gap is created between the center pole 11 and the furnace wall due to the tilting operation, and the tip of the center pole 11 is moved again until just before it comes into contact with the furnace wall. Tilt.

(Go to Figure 5) In this state, run and tilt the center pole again in the same manner to make the pole stand vertically at the center of the furnace.

(Fig. 5 2) Next, the operation of connecting the rotating shaft is performed in the manner described above, and the operation of carrying into the furnace is completed.

The unloading operation is also performed in completely reverse order.

The above operation can be performed according to a preset operating procedure by a control device or the like, and can be performed in a short time.

As described above, according to the present invention, each drive unit is all mounted on a cart and the part that enters the furnace has a cantilever structure, so only the tip of the cart is located, and the drive part is located outside the furnace. Therefore, there is no need to worry about being affected by heat.

Furthermore, since it operates as a unit with the trolley, a position detecting body is installed in each drive unit, and it can be operated according to the operating procedure set in advance by the control device, so it can be carried in and carried out in a short time.

Furthermore, the connection operation of the pivot shaft system can be performed reliably without requiring any skill, and the connection state can be confirmed outside the furnace.

Therefore, it has become possible to fully automate the entire loading process.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the prior art, Fig. 2 is an overall explanatory diagram of the present invention, Fig. 3 is an explanatory diagram of the support part of the center ball in the present invention, and Fig. 4 A 2 is a diagram of the turning in the present invention. , a detailed explanatory diagram of the driving section, and FIG. 5 is an explanatory diagram of the operation of the apparatus of the present invention. 6...Rail, 7...Dolly, 8,9.
... Traveling wheel, 10... Traveling drive unit, 1
1... Center ball, 12... Spray nozzle, 13, 16, 20... Wire rope,
14...Tilt axis, 15...Ball guide, 17...Pulley, 1B, 21.38...
... Winding drum, 19 ... Rotating shaft, 22 ...
... Hose, 23 ... Furnace wall, 24 ...
...Swivel drive unit, 25...Swivel drive shaft, 26.
...Coupling, 27...Bevel gear,
28... Motor, 29... Speed reducer, 3
0... Small gear, 31... Large gear, 32
...Sveliki, 33...Bundle,
34...Screw, 35...Casing,
36... Spring.

Claims (1)

[Scope of Claims] 1. A truck installed on a rail placed outside the furnace in the direction of the furnace core is formed into a long length, or a long frame is provided on the truck, and both of them are It is formed as a cantilever structure so that it can move forward and backward in the furnace, and is equipped with a telescopic, pivotable, and tiltable center pole near the tip of the cart or long frame, and a nozzle is installed at the tip of the pole. The rotating drive shaft is provided so as to be freely rotatable and tiltable, and a swing drive shaft is mounted on the truck or the elongated frame, and the swing drive shaft is formed so as to be freely detachable in the axial direction via a coupling.
A blast furnace wall hot repair device characterized in that one end of the swing drive shaft is linked to a center pole via a bevel gear, and the other end is linked to a power transmission device capable of axial movement and swing operation. . 2. A long trolley installed on a rail placed outside the furnace in the direction of the furnace core, or a long frame installed on the trolley, and both of them cantilevered inside the furnace. At the same time, a telescopic, rotatable and tiltable center pole is provided near the tip of the trolley or long frame, and a spray nozzle is provided at the tip of the pole so that it can be rotated and tilted. , a swing drive shaft is mounted on the truck or the elongated frame, and the swing drive shaft is formed so that it can be freely separated in the axial direction via a compression ring,
One end of the swing drive shaft is interlocked with the center pole via a bevel gear, and the peripheral surface of the other end is threaded and is mounted in a casing integrally formed with a large gear rotated by a drive source on the truck. The swing drive shaft and the large gear are interlocked via a sliding key, and an adjustment bundle is screwed onto the thread of the swing drive shaft, and the adjustment bundle is fitted with a spring inserted into the casing under circular pressure. A blast furnace wall hot repair device characterized in that the blast furnace wall is supported by a casing by the repulsive force of the blast furnace wall.