JPS5924350B2 - Blow pipe for repairing inside the furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blowpipe structure that allows smooth sliding and rotation.

[Prior Art] Conventionally, as a form of repair work for RH furnaces, DH furnaces, ladles, tundish troughs, converters, etc., a repair device equipped with a blowing pipe has been used.

This involves supplying a refractory material to a spray pipe, and spraying the material onto the wall surface of a furnace or the like through a spray nozzle attached to the tip of the pipe. In this case, the blowing pipe is designed to be able to freely rotate and move forward and backward, and in many cases has a double structure to increase the forward and backward stroke with respect to the furnace. However, it was still insufficient. [Object of the Invention] The present invention was created in consideration of the current situation, and its purpose is to be able to integrally rotate the inner and outer pipes without damaging the relative sliding movement of the inner and outer pipes, and to It is an object of the present invention to provide a spray pipe that can be fed out powerfully and accurately and that can perform reliable spraying work.

[Structure of the Invention] The present invention provides an axial sliding roller between an inner pipe and an outer pipe, and the sliding engagement relationship between the roller and the outer surface of the inner pipe and the inner surface of the outer pipe is controlled by the rollers of the respective pipes. This allows the inner pipe and outer pipe to be slid relative to each other, and the inner pipe, outer pipe, and axial sliding roller to rotate integrally. This invention relates to a blowing pipe for repairing a furnace interior, further comprising an axial sliding roller connected to a feeding motor attached to an outer pipe.

[Embodiments of the Invention] Hereinafter, a repair device equipped with a blowing pipe according to the present invention will be described in detail with reference to embodiments shown in FIGS. 1 to 4.

FIG. 1 shows the installed state of a repair device equipped with a blowing pipe according to the present invention.

In the figure, 1 is the RH supported movably on the upper frame 2.
This is a reactor, and the reactor has a suction pipe 3 and a discharge pipe 4 projecting from the bottom thereof, extending downward and having an opening at the lower end.

A lower pedestal 5 (which can also be made movable) is further installed below the RH reactor, and a molten metal receiving container 6 (indicated by a dotted line) for degassing is provided on the lower pedestal. is brought to the mobile trolley 7 (shown in dotted lines). After degassing, the molten metal receiving container 6 is moved from the dotted line position, and in place of it, the repair device 8 according to the present invention is brought along the rail 9 directly below the RH reactor 1 to the position shown by the solid line in FIG. 〇 Regarding other things in Figure 1, 11 is a monitoring window provided at the top of the RH reactor 1, 12 is a monitoring worker, and 13 is a remote control device 14, 15.
2 shows an operator operating the repair device 8.

2 and 3 show the detailed structure of the repair device 8 according to the present invention.

In the figure, 16 is a hollow inner pipe equipped with a removable spray nozzle 17 at the upper end, and the pipe is attached to a traveling trolley 18 that can freely run on rails 9 through a space 19 so that it can be inserted. .

In addition, the inner pipe 16 is RH
It can move up and down (advance and retreat) with respect to the reactor 1, and can also be rotated around an axis by a rotation mechanism 21. The traveling carriage 18 is equipped with a drive motor 22, and can run along the rail 9 in any direction when the drive motor is operated.

The feeding mechanism 20 is mounted on the traveling carriage 18, and substantially concentrically surrounds the inner pipe 16, and further includes an outer pipe 23 that supports the inner pipe in a movable manner but not rotating. Two pairs of upper and lower feed rollers 24 and 25 are rotatably attached to the upper and lower ends, respectively, and a feed roller is fixed to the lower outer wall of the outer pipe 23 and has an output shaft rotatably connected to the lower feed roller 25. Drive motor 26
It becomes more.

Reference numeral 27 denotes a slide pairing that rotatably supports the outer pipe 23 on the traveling carriage 18.

Note that the upper feeding roller 24 can also be attached to the inner pipe 16. In the above configuration, it is preferable that the inner pipe 16 has a non-circular cross section or a cross section that is at least partially straight (e.g. square), and the feeding rollers 24, 25
The contact surface is also made straight, and the feed roller is pressed against the inner pipe 16 to make flat surface contact.

In addition, the outer pipe 23 has a conical scraper 28 on the top that is convex upward, and the inner pipe 1611
It is possible to scrape off the slag spraying material and the like adhering to C as the inner pipe 16 moves up and down, and it is also possible to protect the feeding mechanism 20 and the rotating mechanism 21 from the falling objects. The rotation mechanism 21 is also mounted on the traveling carriage 18, and includes a cylindrical support frame 29 that substantially concentrically surrounds the outer pipe 23 and rotatably supports the outer pipe 23.
An annular worm wheel 3 fixed to the lower outer periphery of 3
0. It is composed of a worm shaft 31 that meshes with the worm wheel, and a rotation drive motor 32 that is attached to the traveling truck 18 to rotate the worm shaft.

In addition, 33 and 34 in the figure are a refractory supply hose and a spraying auxiliary material (water) supply hose which are rotatably connected to the inner pipe 16 via a flexible connecting fitting 35, and are used for repair according to the present invention. Describing the operation of the device 0 First, after the degassing work is completed, the molten metal receiving container 6 is removed from the dotted line position, the lower frame 5 or the traveling cart 18 is run on the rail 9, and the RH
The reactor is brought directly below the reactor 1.

Thereafter, the feeding mechanism 20 is driven to raise the inner pipe 16 using the feeding rollers 24 and 25 that are in pressure contact with each other, and the spray nozzle 17
into the RH reactor 1. Next, the rotation mechanism 21 is driven to integrally rotate the outer pipe 23, the feed rollers 24, 25, and the inner pipe 16 around the axis of the inner pipe, and the blowing end of the blowing nozzle 17 is moved to the desired covering position of the RH furnace 1. The refractory supply hose 33 and the spraying auxiliary material (water and water ) Through the supply hose 34, for example, refractories and water can be supplied into the inner pipe 16, and the sprayed refractory that has become a slurry in the inner pipe 16 can be sprayed from the spray nozzle 17 onto the wall surface to be constructed. 0 that is a thing
- Furthermore, the above repair work can be carried out safely and reliably using the remote control devices 14 and 15.

Furthermore, in the repair device according to the present invention, the inner pipe 16 is configured to include a lower inner pipe 16a that is rotatable around an axis and an upper inner pipe 16b that is eccentric from the same axis, as shown in FIG. You can also do that.

By doing this, for example, in the repair work outside the reactor 1, the axis of the lower inner pipe 16a can be aligned with the DH furnace 40.
The axis of the suction pipe 41 is the same as that of the rotation mechanism 21.
When driven, the upper inner pipe 16b and the spray nozzle 17 can rotate around the suction pipe 41 at a constant distance from the outer periphery of the suction pipe.

〔Effect of the invention〕

As described above, in the present invention, the blowing pipe structure has a double structure consisting of an inner pipe and an outer pipe.
Both pipes are further provided with the above-described feed rollers, and the above structure allows the inner and outer pipes to slide relative to each other smoothly, accurately and strongly, and also to rotate integrally. Therefore, wear of the pipe can be prevented as much as possible, and the operation (advance/retreat, rotation, etc.) of the pipe can be made smooth and reliable.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram of a repair device equipped with a blowing pipe according to the present invention, Fig. 2 is a partially cutaway front view of the same device, Fig. 3 is a partially cutaway perspective view of the same device, and Fig. 4 is another one. It is a layout diagram of the above-mentioned repair device which comprises the blowing pipe of the embodiment. In the figure, 1...RH reactor, 2...Upper frame, 3...Suction pipe, 4...Discharge pipe,
5... lower frame, 6... molten metal receiving container, 7... moving trolley, 8... repair device,
9...Railway, 11...Monitoring window, 12.
...Monitoring worker, 13...Operation worker,
14...Remote control device, 15...
...Remote control device, 16...
Inner pipe, 17...Blow nozzle, 16a...
...Lower inner pipe, 16b... Upper inner pipe, 18... Traveling trolley, 19... Blank space,
20... Feeding mechanism, 21... Rotating mechanism, 22... Drive motor, 23... Outer pipe, 24... Upper feeding mechanism. Exit 25...
...lower feeding roller, 26... feeding drive motor, 27... thrust bearing, 28...
... Conical scraper, 29 ... Cylindrical support machine frame, 30 ... Annular worm wheel, 31 ...
... Worm shaft, 32 ... Rotation drive motor, 41 ... Suction pipe.

Claims (1)

[Claims] 1 An axial sliding roller is interposed between the inner pipe and the outer pipe, and the sliding engagement relationship between the roller and the outer surface of the inner pipe and the inner surface of the outer pipe is such that relative rotation of the roller with respect to each pipe is impossible. This allows the inner pipe and the outer pipe to be slidable relative to each other, and
A blowing pipe for repairing a furnace interior, characterized in that an inner pipe, an outer pipe, and an axial sliding roller are integrally rotated, and the axial sliding roller is further connected to a feeding motor attached to the outer pipe. .