JPS6340794Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for repairing damaged parts of a molten metal container by patching, and in particular, a device for repairing damaged parts of a molten metal container by mechanically compressing sliced repair members. This invention relates to a device that can improve the durability of layers.

[Conventional technology]

As is well known, in the steel industry, converters, ladles,
Molten metal containers (hereinafter simply referred to as containers) such as tundishes and gutters are commonly used.

These containers are lined with monolithic refractories such as refractory bricks or castables, but when used to store and transfer high-temperature molten metals such as hot metal or molten steel, or for reaction treatment, the molten metal is retained. Due to high temperatures, impactful flow of molten metal, or rapid heating and cooling due to repeated use, cracks and abnormal melting damage occur in the refractory lining, rendering it unusable, so it is necessary to extend the life of the refractory. Re-coating repair is carried out in hot conditions in a short period of time.

Conventionally, methods for hot repairing this damaged container have mainly been spraying, and in some cases thermal spraying has also been used, but these repair methods have the following problems.

(1) Spraying repair uses pressurized air to spray powder-like monolithic refractories stored in a material supply tank.
A dry spraying method is used, in which the liquid is pumped through a hose to the liquid addition section of the spray nozzle, mixed with water or other liquid, and sprayed from the nozzle tip.The equipment is relatively inexpensive and repairs can be done easily. Although it is the most popular type, the adhesion rate is around 70 to 80%, and the high rebound loss generates dust, worsening the working environment, and the adhesive strength between the repaired surface and the monolithic refractory is weak. It has the disadvantage of poor durability because a strong recoating layer cannot be obtained.

(2) Thermal spray repair is a method of repairing by melting powdered refractory sprayed material in an oxygen-fuel flame and injecting and welding the molten refractory material to the damaged area of the reactor wall, but the equipment is complex and expensive. However, it has not been put into widespread use due to its high performance and problems such as rebound loss and noise.

Therefore, various proposals have been made to improve the work environment by reducing rebound loss and dust generation, increase adhesion rate and adhesive strength, and improve durability, but so far, there have been no sufficient repair effects and repair methods. There is no effective repair method that combines efficiency.

[Problem that the invention attempts to solve]

The present invention was made with the aim of solving the above-mentioned problems of the conventional technology, and a vacuum suction mechanism is provided at the tip of the cylinder drive shaft of a plurality of cold-protected crimping cylinders. Provides a patching repair device for molten metal containers that can improve hot repair efficiency and repair effectiveness by attaching and mechanically crimping repair members, and improving the durability of the formed recoating layer. It is something to do.

[Means to solve the problem]

Hereinafter, the present invention will be explained in detail based on an embodiment shown in the drawings.

The patching repair device for a molten metal container according to the present invention includes a cylinder drive system for a crimping cylinder 3 which is surrounded by a cylinder protection case 1 and a cylinder protection guide 2 and is protected by cooling, as shown in the longitudinal section in FIG. A vacuum suction mechanism 5 for attaching a repair member 6 to the tip of the shaft 4 is provided.

The cylinder protection case 1 and the cylinder protection guide 2 have a surface temperature of about 300 to 1000°C of the refractory lining of the molten metal container that requires recoating and repair, and are exposed to high temperatures when hot recoating of damaged parts is performed. Therefore, it is provided to surround and protect the crimping cylinder 3, which will be described later, by cooling it.

Therefore, the cylinder protection case 1 is formed into a hollow rectangular parallelepiped shape with a size large enough to surround the plurality of crimping cylinders 3, and the cooling air supply port 7 for supplying cooling air to cool the inside is located on the base end surface. A cylinder protection guide 2 is provided on the side facing the surface on which the cooling air supply port 7 is provided. Case 1
The cooling air supplied inside the cylinder protection guide 2
A vacuum suction hose 10 for the vacuum suction mechanism 5 is provided with a through hole 9 for ejecting water inside the cylinder, and is provided at the tip of the cylinder drive shaft 4 of the crimping cylinder 3.
It is also made to be able to cool down.

As shown in FIG. 3, the crimping cylinder 3 disposed inside the cylinder protective case 1 drives a cylinder drive shaft 4 to attach a repair member 6 to a vacuum suction mechanism 5 provided at the tip. Lining refractory 1
1, the cylinder drive shaft 4 is inserted into the cylinder protection guide 2 by passing through the partition wall 8 that partitions the cylinder protection case 1 and the cylinder protection guide 2 so that the cylinder protection case 1 and the cylinder protection guide 2 can be crimped according to the damage state (unevenness) of the cylinder protection case 1. They are fixed in the direction of being driven inward, and are arranged in parallel in the vertical and horizontal directions. The pressure of each crimping cylinder 3 can be arbitrarily set using a pressure control valve (not shown) connected via a hydraulic hose 12 (shown in FIG. 1).

A vacuum suction mechanism 5 is provided at the tip of the cylinder drive shaft 4 of each crimping cylinder 3 for mounting a repair member 6 and crimping it on the damaged portion of the lining refractory 11. This vacuum suction mechanism 5 has a metal tip 13 formed in the shape of a hollow square, as shown in the vertical side view in FIG. vacuum suction hose 10 for creating a vacuum inside the tip metal fitting 13
is inserted into a through hole 9 provided in the partition wall 8, passes through a cooling air supply port 7 provided in the cylinder protective case 1, and is connected to a vacuum pump (not shown). Further, on the other end surface, a large number of vacuum suction holes 14 for adsorbing the repair member 6 are provided at appropriate intervals.

In order to attach the repair member 6 and perform crimping according to the damage state of the lining refractory 11, the vacuum suction mechanism 5 makes the tip metal fittings 13 and the repair member 6 as small as possible, and makes the space between adjacent tip metal fittings 13 as small as possible. It is best to minimize the area that is not pressurized by the metal tip 13 by narrowing the area and arranging the crimping cylinder 3 so that the pressure can be applied evenly. However, if the tip metal fitting 13 and the repair member 6 are made too small, the equipment will become complicated and the repair efficiency will decrease. It is important to set the number of refractory linings 11 according to the damage state of the refractory lining 11 and the required repair efficiency.

The repair member 6 drives the cylinder drive shaft 4 of the crimping cylinder 3 so that it can be crimped onto the damaged part of the lining refractory 11 while being compressed by the metal tip 13. A monolithic refractory 15 such as plastic refractories used in the It melts and scatters when it comes into contact with the damaged part of the high-temperature lining refractory 11, prevents the monolithic refractory 15 from adhering to the tip metal fitting 13 when the crimping cylinder 3 is depressurized, and prevents the monolithic refractory 15 from adhering to the tip metal fitting 13.・The surface is covered with a packaging material 16 such as nylon, vinyl, or paper that can prevent water evaporation from the monolithic refractory 15 during repair, and the material is placed at regular intervals in a container such as a box so that it can be installed all at once. are arranged in

[Effect]

When performing patching repair using the device of the present invention configured as described above, as shown in FIG. , arm 1
The cooling air supply port 7 side of the device of the present invention is fixed to the lower end of a pipe 20 that can be rotated up and down by an up/down rotation mechanism 19 provided at the tip of the pipe 8 . When recoating a wide area such as a slag line, the valve of the vacuum pump is fully opened and the repair member 6 is attached to each vacuum suction mechanism 5. Incidentally, when re-covering and repairing a small localized damaged area, the valve of the vacuum pump may be opened only within the necessary range depending on the damage condition, and the repair member 6 may be attached.

Then, by operating the arm 18 provided on the support 17 and the pipe 20, the side on which the repair member 6 is attached corresponds to the damaged part, and while cooling air is blown out from the through hole 9 provided in the partition wall 8, the crimping cylinder is pressed. The cylinder drive shaft 4 of No. 3 is driven to press the repair member 6 to the damaged part. If you wish to perform local re-covering repairs such as cracks at this point, increase the pressure in the crimping cylinder 3 at the location corresponding to the crack, and by increasing the pressure, the crimping force will increase and the re-covering will be effective. Repairs can be made. In addition, when recoating a surface due to melt damage, etc., the pressure of the crimping cylinder 3 at the center of the surface is increased preferentially to prevent moisture and steam from scattering from the surrounding repair member 6. After making it easier, the pressure of the crimping cylinder 3 is gradually increased from the center of the surface toward the periphery.
Crimp the entire surface. Then, by moving the entire device and applying pressure again to the portion that has not been pressurized by the metal tip 13, a dense recoating layer can be formed. Furthermore, the repair member 6 repairs the surface of the monolithic refractory 15 using a packaging member 16 made of nylon or the like.
Since the temperature of the repaired surface of the refractory lining 11 is as high as about 300 to 1000° C., the bonding strength will not decrease even if the repaired surface is covered with the adhesive.

In the embodiment, the crimping cylinders 3 are arranged in parallel in the vertical and horizontal directions, and the surface where the tip metal fitting 13 contacts the repair member 6 is formed into a square shape.
It can also be formed into a rectangular, hexagonal, or circular shape, and the crimping cylinders 3 can be arranged in a staggered manner, and is not limited to the above embodiments. Furthermore, although an example in which hydraulic pressure is applied to drive the crimping cylinder 3 has been described, it can also be driven by pneumatic pressure, electric power, or the like.

Furthermore, as for the repair member 6, it goes without saying that re-coating repair can be performed by attaching a repair member 6 of an appropriate size to the vacuum suction mechanism 5 to match the repair area.

[Effect of idea]

As explained above, in the present invention, the crimping cylinder is surrounded by a cylinder protection case and a cylinder protection guide to protect it by cooling, a vacuum suction mechanism is provided at the tip of the cylinder drive shaft, and the attached repair member is attached to the crimping cylinder. Since it is constructed so that it can be crimped with pressure, the repaired part can be mechanically crimped using high generated force such as hydraulic pressure, resulting in strong re-coating that could not be achieved with conventional spray repair. The layer is easy to obtain and allows for effective hot recoating repair, significantly increasing durability. Furthermore, since there is no rebound loss, dust generation, or noise generation, it is economical and at the same time can significantly improve the working environment. Furthermore, the apparatus can be simplified, and a great effect can be exhibited especially when performing re-covering repair of a small local area.

[Brief explanation of the drawing]

Embodiments of the present invention are shown from FIG. 1 to FIG. 4,
Figure 1 is a longitudinal side view when the repair member is installed, Figure 2 is a longitudinal side view of the vacuum suction mechanism and the repair member,
Figure 3 is an explanatory diagram showing the state in which repair members are crimped according to the damage state of the refractory lining, and Figure 4 is an explanatory diagram showing the state when re-covering and repairing. The symbols in the diagram are as follows. . 1: Cylinder protection case, 2: Cylinder protection guide, 3: Crimping cylinder, 4: Cylinder drive shaft, 5: Vacuum suction mechanism, 6: Repair member, 7: Cooling air supply port, 8: Partition wall, 9: Penetration Hole, 10: Vacuum suction hose, 11: Lining refractory, 12: Hydraulic hose, 13: Tip hardware, 14: Vacuum suction pore, 15: Monolithic refractory, 16: Packaging member, 1
7: Pillar, 18: Arm, 19: Lifting rotation mechanism,
20: Pipe.

Claims (1)

[Scope of utility model registration request] Cylinder protection case 1 and cylinder protection guide 2
A repair member 6 is attached to the tip of the cylinder drive shaft 4 of the plurality of crimping cylinders 3 which are surrounded and protected by cooling.
A patching repair device for a molten metal container, which is provided with a vacuum suction mechanism 5 for attaching a molten metal container.