JPS6316676B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a flame spray repair method and apparatus that can be suitably applied to repairing locally damaged parts such as industrial furnace walls, particularly coke oven linings.

[Prior art]

In recent years, when repairing the lining of various metallurgical furnaces, for example, as described in JP-A-58-110983, the adhesion of the repair material to the lining, the denseness of the construction body itself, and the hot Thermal spray repair methods, in which a refractory powder material is passed through a high-temperature, high-velocity flame and sprayed in a molten state onto the damaged area, have become widely used because of its high thermal efficiency.

However, in this thermal spray repair method, the refractory powder used as the repair material is sprayed in a diffused state by the flame, so as shown in Figure 1, the refractory powder a is scattered and the thermal spray material b is spread over a relatively wide area. If the lining damage part c is a local damage in a narrow range, the sprayed body b will also be formed around the damaged part c, and the surface of the sprayed body b will have a shape in which the damaged part c is enlarged. This causes unevenness. For this reason, when repairing a coke oven lining that is mainly caused by localized defects, cracks, etc., and requires intensive localized repair where the damaged surface has significant unevenness, the sprayed surface will become enlarged and uneven, and the damage will extend to the inside of the cracked area. There was a problem in that it was difficult to fill with thermal spray material and thermal spray repair could not be applied.

[Purpose of the invention]

The present invention eliminates such drawbacks of thermal spray repair and makes it possible to apply the thermal spray repair method to locally damaged surfaces with severe irregularities.

[Structure of the invention]

As shown in FIG.
A trowel 1 is applied from the outside to the thermal sprayed body b, which has been sprayed in a molten state, and the convex portions of the plastic surface of the thermal sprayed body b are slid into the concave portions to repair locally damaged areas. be. This iron 1 has a built-in vibrating body that is powered by water, electricity, air, etc., and uses this vibrating iron to press the thermal spraying object from the outside and press it against the thermal spraying object b. Slide body b into the damaged area c. As the vibrating body, a rotor type, screw type, plate vane type, etc. driven by fluid or electricity can be used.

FIG. 3 shows an example of a device used in the method of the present invention in cross-sectional view. Referring to the figure, a thermal spray repair application device 10 is comprised of a cooled insertion tube 2 and a trowel 1 provided at the tip thereof.
The insertion tube 2 is made of a double tube, and a cooling water introduction path 5 is formed between a heat-resistant outer tube 3 and an inner tube 4, and a cooling water discharge path 6 is formed by the inner tube 4. are doing. The iron 1 attached to the tip of the insertion tube 2 is
It has a so-called trowel-shaped casing 7 that is made of SUS for applying to the thermal spray object, is formed into a shape that matches the damage situation of the furnace wall, and is usually finished with smooth surfaces on both sides so that it can be used on both sides. There is. Inside the casing 7 is a cooling water introduction chamber 8 communicating with the cooling water introduction path 5 of the insertion tube, and a vibrator mantle for rotating the eccentric rotor 9 located inside the cooling water introduction chamber 8. It has a built-in exciter consisting of 11. In the above configuration, the double pipe cooling water introduction path 5
The high pressure water from the cooling water introduction chamber 8 in the casing 7
is introduced into the inner chamber 13 through the opening 12 of the exciter jacket 11, and the eccentric rotor 9 is rotated in the direction of the arrow to strike the inner wall of the exciter jacket 11 to give vibration to the iron 1.

After being used to drive the eccentric rotor 9, the cooling water flows through an inner pipe 4 provided at the lower end of the inner chamber 13.
It is discharged from there through a double-pipe discharge path 6.

4 and 5 show other embodiments of the device according to the present invention, in which an eccentric weight 15 is provided on a screw impeller 14 within an exciter mantle 11 as an exciter. It is something. In this configuration, high-pressure water from the double-pipe cooling water introduction passage 5 is introduced into the cooling water introduction chamber 8 in the casing 7, enters the inner chamber 13 through the top opening 12 of the exciter jacket 11, and enters the screw impeller. As the iron 14 rotates in the direction of the arrow, the eccentric weight 15 strikes the inner wall of the exciter jacket 11 to give vibration to the iron 1.

In addition, FIG. 5 shows a vane impeller 16 as an exciter.
The inner chamber of the casing 7 is separated into a cooling water introduction chamber 17 and a discharge chamber 18 by an exciter jacket 11.

In carrying out the method of the present invention, any type of exciter can be used in addition to the structures shown in the above embodiments. However, when the fluid described in the above embodiment is used as a power source for generating vibrations, the cooling water used as a cooling medium during hot work can be used as is, so the structure of the device itself can be relatively simple. This has the advantage that the vibrating force can be easily adjusted and the weight of the vibrating iron can be reduced.

〔Effect of the invention〕

In the present invention, after the thermal spraying repair, the thermal spray body is smoothed, so even if the repair location is extremely limited during the thermal spraying process, a high temperature and high pressure flame can be used without reducing the thermal spraying efficiency. Therefore, it can now be used in furnaces such as coke ovens, to which conventional thermal spray repair methods could not be applied, and the range of applications can be greatly expanded.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the problems of forming a thermal spray body in the thermal spray repair method, Fig. 2 shows an aspect of the repair method of the present invention, and Figs. It is a figure showing an example of the device used for. 1: Trowel, 2: Insertion tube, 3: Outer tube, 4: Inner tube,
5: Inlet passage, 6: Discharge passage, 7: Casing, 8:
Cooling water introduction chamber, 9: Eccentric rotor, 10: Thermal spray repair application device, 11: Exciter jacket, 12: Opening, 1
3: Inner chamber, 14: Screw impeller, 15: Eccentric weight, 16: Vane impeller, 17: Cooling water introduction chamber, 18: Discharge chamber.

Claims (1)

[Claims] 1. After flame spraying the repair material onto the damaged part of the reactor wall, a trowel member with a built-in vibrating device is brought into contact with the tip of an insertion tube with a cooling channel formed inside, against the surface of the sprayed object. A furnace wall thermal spray repair method characterized by flattening the surface of a thermal spray object by vibration of a trowel member. 2. Reactor wall thermal spraying repair characterized by comprising an insertion tube made of multiple tubes with cooling water passages formed inside, and a trowel member attached to the tip of the insertion tube and having a built-in vibrating device. Device.