JPH02436Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an improvement of a spray repair device for an RH degassing furnace, which is used for hot spraying repair of refractories constituting the RH degassing furnace. Regarding.

[Prior Art] When repairing refractories in molten metal containers, a method is used in which a spraying nozzle is directed toward the repaired area and a spraying material is sprayed. The equipment used for this type of spray repair is such that the spray repair machine is installed on a self-propelled or towed repair trolley and can be moved to a position below the RH degassing furnace. It is attached to the main body of the repair machine so that it can be raised and lowered and rotated.

When repairing an RH degassing furnace with such a repair device, the parts to be repaired of the furnace refractories are the outer and inner surfaces of the immersion pipe, the reflux pipe, and the lower layer, and by moving the position of the trolley and rotating the injection pipe up and down, The inner surface is repaired by passing the nozzle part into the immersion pipe, or the outer surface is repaired by directing the nozzle toward the outer surface.

[Problems to be solved by the invention] Incidentally, in recent years, the development and improvement of the injection port at the tip of the spray nozzle has been actively carried out.In particular, rubber is used as a member of the tip, and by vibrating the rubber, the liquid and the spray are Nozzles have been proposed that increase the degree of mixing of materials and provide stable discharge conditions and a high adhesion rate.

However, since the conventional device uses rubber for the nozzle, its use is limited due to its heat resistance. In other words, when repairing the outer surface of the immersion pipe of an RH degassing furnace by spraying, thermal effects are not a problem, but when repairing other parts, the ambient temperature is 1000°C or higher, so Nozzles using rubber have the disadvantage of being unusable. Moreover, only 3/4 of the amount of spraying material used is for external repair, and even if it is desired to use a rubber nozzle with a good adhesion rate only for external repair, the high temperature environment during inner repair may be an inhibiting factor. I was too old to hire one.

In this regard, it is possible to install spray repair machines equipped with dedicated nozzles for internal and external surfaces independently on the trolley, or to connect them to the trolley, but dimensional constraints would increase due to additional installation on existing equipment. In particular, the dimensions of the truck in the direction of travel are severe, making it impossible to create a compact device.

The present invention focuses on the above-mentioned conventional problems, and aims to make it possible to use a nozzle that can obtain a stable discharge state and a high adhesion rate, and to provide a spray repair device with a compact structure and high work efficiency. purpose.

[Means for solving the problem] In order to achieve the above purpose, the RH according to the present invention
The spraying repair device for a degassing furnace has an inner spraying trolley and an outer spraying trolley installed in multiple stages on a movable trolley that is movable at a position below the RH degassing furnace. An injection pipe that can be inserted into the immersion pipe of the RH degassing furnace is installed on the RH degassing furnace so as to be able to move up and down and rotate, and an injection pipe with the injection port facing the outer circumferential surface of the RH degassing furnace is installed on the outer surface spraying truck so that it can be moved up and down and rotated. It is mounted so that it can rotate.

[Function] With this configuration, each of the inner and outer surface spraying carts can be independently moved vertically and horizontally with respect to the furnace, and each dedicated spraying cart can perform spraying repairs at the same time, and each spraying cart can move in multiple stages. Since it is installed on a trolley and the traverse movement line can be on the same vertical plane, it becomes a very compact structure that can sufficiently cope with the size limitations of the moving trolley in the moving direction. Moreover, since it is a dedicated spraying trolley, a rubberized nozzle can be used for the outer surface, making it possible to create a structure that stabilizes the discharge and increases the adhesion rate.

[Example] Hereinafter, an example of the spray repair device for an RH degassing furnace according to the present invention will be described in detail with reference to the drawings.
FIG. 1 of the drawings is a front view showing the embodiment device, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof.

In each figure, the RH degassing furnace 10 is the upper tank 1.
2. It has a lower tank 14, from which a pair of immersion pipes 16A and 16B hang down. A movable trolley 18 is movable on the floor below the furnace 10, and this is carried by rails 2 laid on the floor.
0 as a guide route.

The moving trolley 18 is a rectangular frame box body that is narrow in the running direction and wide in the direction perpendicular to this, and has an intermediate pedestal 26 between the floor plate 22 and the top plate 24.
It has a multi-stage structure with The top plate 24 and the intermediate pedestal 26 are provided with the rails 28 and 30.
The inner surface spraying trolley 3 is moved laterally using the guideway as a guide path.
2 and an exterior spraying trolley 34 are installed. The inner surface spraying trolley 32 is installed on the top plate 24, and the outer surface spraying trolley 34 is installed on the intermediate pedestal 26.

The upper inner surface spraying trolley 32 has an injection pipe 36 that has a bent tip so as to be inserted into the immersion pipes 16A and 16B of the furnace 10, and is equipped with a nozzle 36A whose discharge direction is approximately horizontal. is penetrated by. Although this injection pipe 36 is not shown,
It is attached to a table rotated by a motor installed on the spraying cart 32 so that it can turn, and is connected via a pinion rack mechanism etc. so that it can move up and down with respect to the table, and the spraying from the nozzle 36A is made possible. The direction can be changed to the circumferential direction and the vertical direction. In this case, the vertical stroke of the injection pipe 36 may be such that the nozzle 36A reaches the bottom of the upper tank 12. (Usually, the length is 4 m or more.) On the other hand, the injection pipe 3 is also installed on the lower outer surface spray surface truck 34.
8 are installed through the top and bottom. This injection pipe 38
The upper part of the crank pipe 38A is larger in radius than the immersion pipes 16A and 16B, and the crank pipe 38A is
A rubber nozzle 38B whose discharge direction is directed toward the outer wall surface of the furnace 10 is provided at the tip of the nozzle 8A. Although not shown, the injection pipe 38 is also mounted so as to be able to rotate and move up and down using a rotary table, pinion rack mechanism, etc. installed in the truck 34.

The injection pipes 36 and 38 attached to each of the spraying carts 32 and 34 are connected to a spraying material feeder 40 installed on one side of the movable cart 18. It is adapted to be connected to each of the outlets. In order to input material into the feeder 40, a material input hopper 42 is installed on the top plate 24 of the movable trolley 18, and the material is introduced into the feeder 40 via a chute 44.

Incidentally, the top plate 24 and the intermediate pedestal 26 are provided with windows 46 for the injection pipes 36, 38 to pass through, so as not to become an obstacle during horizontal movement. In the figure, the reference numeral 48 indicates a staircase, and the reference numeral 50 in FIG. 2 indicates a pot truck.

The operation of the spray repair apparatus constructed in this way is as follows.

During repair, the movable cart 18 is moved along the rails 20 so that the spraying carts 32 and 34 are positioned below the furnace 10. Then, the upper inner surface spraying trolley 32 is moved below one of the immersion pipes 16A, and the lower outer surface spraying trolley 34 is moved below the other immersion pipe 16B. Next, the material feeder 40 is put into operation, and each spraying trolley 32, 34
The injection pipes 36 and 38 are raised, and the injection pipe 36 is inserted into the immersion pipe 16A so that its nozzle 36A is directed toward the inner surface of the furnace. Further, the injection pipe 38 is moved upward to a desired height, and the nozzle 38B is directed toward the outer surface of the furnace. Then, injection is started, and the refractory is repaired while rotating and moving up and down.

In this way, since the spraying carts 32 and 34 are arranged in multiple stages above and below to form a three-dimensional structure, the spraying carts 32 and 34 are made compact and can be installed even within an existing narrow layout. In addition, the nozzle 32 is used for external blowing and internal blowing.
Since A and 38B are specialized, a rubber nozzle with good adhesion efficiency can be used for external spraying, and a nozzle with high heat resistance can be used for internal spraying, making it possible to perform more reliable and appropriate spraying repairs.

Furthermore, as shown in the figure, one immersion pipe 16A can be repaired simultaneously with the injection pipe 36 for inner surface spraying, and the other immersion pipe 16B can be repaired simultaneously with the injection pipe 38 for outer surface spraying, so that the repair time can be significantly shortened.

[Effects of the invention] As described above, according to the invention, the apparatus can be made very compact and space can be used effectively. Additionally, it becomes possible to use nozzles exclusively for the interior and exterior surfaces, making it possible to perform spray repairs with high adhesion efficiency. Furthermore, work efficiency can also be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of the embodiment device, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof. 10...RH degassing furnace, 18...Moving trolley, 2
0...Rail, 28, 30...Transverse rail, 32
...Inner surface spraying trolley, 34...Outer surface spraying trolley,
36, 38... Injection pipe, 40... Spraying material supply machine.

Claims (1)

[Scope of utility model registration request] An internal spraying trolley and an external spraying trolley, which are movable laterally, are installed in multiple stages on a movable trolley at a position below the RH degassing furnace. In addition to installing the injection pipe that can be inserted into the pipe so that it can be raised and lowered and rotated,
A spraying repair device for an RH degassing furnace, characterized in that an injection pipe with an injection port directed toward the outer peripheral surface of the furnace is attached to the RH degassing outer surface spraying cart so that it can be moved up and down and rotated.