JPH0875373A - Powder material spraying apparatus - Google Patents

Abstract

PURPOSE: To efficiently coat the periphery of a shaft with powder material by providing an arclike slewing rail structure movably supported along the periphery of material to be sprayed with the support of a spraying nozzle, aligning the structure with the material to be sprayed, and providing a support structure rotatably and vertically movably supported. CONSTITUTION: A spraying lance 1 is vertically supported to a lance support guide 2 via a lance turning arm 4, rotated with the arm 4 while maintaining the vertically held state by a slewing motor 3, and telescoped to a desiliconizing lance A. A guide roller 5 is rotatably cantilevered to the center of the guide 2, mounted with a gear 7 rotatably driven by a drive motor 6 at an upper surface, and rotatably supported along the U-shaped slewing rail structure 8 so as to surround the periphery of the lance A. The structure 8 is driven by a driving mechanism 11, vertically moved so as to be moved to the damaged position (a) of the lance A, aligned and sprayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the repair of a long vertical shaft body such as a lance-shaped nozzle for performing desiliconizing work by immersing it in the hot metal of a hot metal truck and ejecting a gas for desiliconizing.

[0002]

2. Description of the Related Art When a desiliconizing gas is jetted into hot metal from a lance-shaped nozzle used for desiliconization, the refractory material around the gas jet port is locally melted.

[0003] Conventionally, as a device for repairing the melted portion, Japanese Patent Publication No. 61-54754 discloses a device for surrounding a lance in a cylindrical shape and extruding and applying a repair material from around the lance surface. Is disclosed. However,
In this spraying device, the lance is removed from the mounting device, and the refractory material at the melted portion is partially or entirely peeled from the lance main pipe, and the refractory material is applied again to that portion. We are repairing. However, there is a drawback in that the repair material is supplied in a batch system and continuous repair cannot be performed.

A repair device similar to this is also available in Japanese Patent Publication Sho 59
Although it is disclosed in Japanese Patent Publication No. 34953, it is structurally difficult to ascend and descend a spray pipe when a long vertical axis, which is the object to be sprayed, and the spray nozzle can move back and forth in the axial direction of the vertical axis. There is a drawback that you cannot do it.

As described above, the repair of the lance-shaped elongated body having the refractory material layer formed on the outer surface by the conventional repair device requires time and effort for removal and installation from the installation device, and further, the repair material at the time of repair. It took a long time to apply and was not efficient.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to apply a powder material around a shaft as in the case of repairing a long vertical shaft having a refractory material on its outer peripheral surface such as desiliconization lance. An object of the present invention is to provide a device capable of efficiently performing the above.

[0007]

DISCLOSURE OF THE INVENTION A powder material spraying device of the present invention comprises a support body for supporting a spray nozzle for spraying a spraying material on a suspended sprayed body so that the spray nozzle can advance and retreat with respect to the spray body. An arc-shaped turning rail structure that movably supports along the periphery of the object to be blown, and a supporting structure that supports the turning rail structure to the object to be blown so as to be rotatable and vertically movable. It is characterized by having.

[0008]

The powder material spraying nozzle directed to the vertical axis is provided so that it can be swung, moved up and down with respect to the vertical axis, and can be leaned toward the vertical axis. The powder material can be sprayed on any part of the peripheral surface.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG.
The whole block diagram of the example applied to the apparatus which repairs with the spraying lance 1 is shown.

In FIG. 1, the spraying lance 1 is vertically supported by a lance support guide 2 via a lance swiveling arm 4, and the lance swiveling arm 4 maintains a drooping holding state by a swiveling motor 3. Can be rotated to move back and forth with respect to the desiliconization lance A.

At this time, the spray nozzle 26 can be directed to the axis T of the vertical axis of the desiliconizing lance A which is the object to be sprayed.

A guide roller 5 is rotatably supported in a cantilever manner at the central portion of the lance support guide 2, and a gear 7 rotatably driven by a drive motor 6 is mounted on the upper surface of the lance support guide 2. A horizontal cross section formed so as to surround the periphery of the is supported rotatably along a U-shaped turning rail structure 8. Although not shown, the spraying material is supplied to the spraying lance 1, but the spraying material device and the other end of the spraying lance 1 are connected to each other by a conventional means such as a hose.

On the inner peripheral surface of the swivel rail structure 8, there are provided inner teeth 9 meshing with the gear 7 of the lance support guide 2 and guide grooves 10 for guiding the guide rollers 5 of the lance support guide 2.

Reference numeral 11 denotes a drive mechanism attached to the base 12 for supporting and rotating the swing rail structure 8, which itself is guided by a screw screw 14 rotated by a motor 13 to move up and down. The elevating frame 25 moves up and down along 15. Further, the drive mechanism 11 includes
An arm 17 whose one end is connected to the support frame 16 of the turning rail structure 8 is provided, and the turning cylinder structure 8 is extended and contracted by the expansion and contraction of a hydraulic cylinder 18 connected to the other end of the arm 17. It is designed so that it can be extended or retreated toward. This forward / backward movement is performed by the arcuate (U-shaped) structure of the turning rail structure 8, that is, the horseshoe shape,
In addition to the effect that one end of the ring shape such as C shape is notched, it is possible to directly approach the middle of the long object of the desiliconization lance A from the side surface. Taking the example of the desiliconization lance A in a tow car, this is convenient when the tip of the lance is located under the work deck and the other end of the lance is connected to the desiliconization gas supply member. That is, if it is ring-shaped, it must be looped from the tip of the lance, and it is not possible to directly approach the middle.

Further, the swing rail structure 8 is supported by a rotatable rail support roller 19 which is cantilevered below the support frame 16, and further, the support frame 1
A drive wheel 22 meshed with a bevel gear mechanism 21 that is rotationally driven by a drive motor 20 provided in 6 drives and rotates in a guide groove 23 formed on the outer surface of the swing rail structure 8 to thereby swing the swing rail structure. The structure is such that the body 8 can be rotated with respect to the base 12.

The operation of this apparatus will be described below.

First, the turning rail structure 8 located at the retracted position below the base 12 (not shown) is driven by the motor 13 of the driving mechanism 11 to move the turning rail into the melting point a of the desiliconization lance A. The structure 8 is lifted so as to come. Then
Arm 1 by extension of hydraulic cylinder 18 for arm operation
The turning rail structure 8 is removed by the rotation of 7
Rush to. Furthermore, the drive motor 20 is operated,
The swivel rail structure 8 is swung through the bevel gear mechanism 21 and the drive shaft 22 until it hits the stopper 24 of the support frame, so that the desiliconization lance A is surrounded by the swivel rail structure 8. In this position, the swing rail structure 8
Is stopped and the drive motor 6 is driven, whereby the lance support guide 2 moves on the turning rail by the meshing of the gear 7 and the internal teeth 9. The swing rail structure 8 is 24
It has an arc shape of 0 ° and can make a half turn around the desiliconization lance A. Then, the spray lance turning motor 3
Is operated to move the spraying lance 1 to a distance suitable for spraying the desiliconizing lance A.

After the work on one side of the desiliconization lance A is completed, the lance support guide 2 rotates the swivel rail structure 8 until it hits the stopper 24.
Spraying work.

By performing the above operation, it is possible to perform the spraying work on the entire circumference while keeping the silicon removal lance A in the vertical position.

[0020]

The device of the present invention has the following effects.

(1) Since the powder spray nozzle can be circulated and sprayed around the vertical axis, it can be used for refractory materials such as desiliconization lance, desulfurization lance, powder, injection lance, and immersion nozzle for molten steel casting. When it is applied to spray repair, thermal spray repair, etc. of the melted portion, it can be performed without removing these operating lances, nozzles, etc. from the vertical position.

(2) Therefore, the lance or the like can be repaired online in a short time.

(3) Since repairing can be done online, it is not necessary to cool the lance, and spalling and life shortening due to cooling of the lance can be reduced.

(4) Since repair can be done online, energy loss due to lance cooling can be reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention.

[Explanation of symbols]

1 Spraying Lance 2 Lance Support Guide 3 Lance Swivel Motor 4 Lance Swivel Arm 5 Lance Support Guide Guide Roller 6 Drive Motor 7 Gear 8 Swivel Rail Structure 9 Inner Teeth 10 Guide Groove 11 Drive Mechanism 12 Base 13 Motor 14 Screw screw 15 Lift guide 16 Support frame 17 Arm 18 Hydraulic cylinder 19 Rail support roller 20 Drive motor 21 Bevel gear mechanism 22 Drive wheel 23 Guide groove 24 Stopper 25 Lift frame 26 Spray nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takahiro Nishimura Inventor Takahiro Nishimura 1-1, Higashihama-cho, Hachimansai-ku, Kitakyushu, Fukuoka Kurosaki Ceramics Co., Ltd. Oita Steel Co., Ltd. (72) Inventor Kazuo Maeda 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd.

Claims (1)

[Claims] 1. A support body which supports a spray nozzle for spraying a spraying material onto a suspended sprayed object so as to be able to move forward and backward with respect to the sprayed object, and the support body is movable along the periphery of the sprayed object. A powder material spraying device comprising: a supported arc-shaped swirling rail structure; and a support structure that supports the swiveling rail structure so that it can be rotated and moved up and down by being aligned with the object to be sprayed.