JPH0459025B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lance device for thermally spraying a repair material onto the inner surface of a converter, a degassing furnace, a ladle, etc.

(Conventional technology) Conventionally, for example, when repairing a converter, a rod-shaped lance is inserted through the opening of the converter with the converter laid down horizontally, and repair material is sprayed from the burner at the tip of the lance toward the inner surface of the converter. . When repairing the bottom wall of a converter, use a straight burner with the spraying direction set in the longitudinal direction of the lance, and when repairing the cylindrical peripheral wall of the converter, spraying in the longitudinal direction of the lance. Use a bent burner with a tilted direction.

(Problem to be solved by the invention) However, since the conventional apparatus uses two types of burners as described above, it is necessary to replace the burners when changing the thermal spraying location between the bottom wall and the peripheral wall. Therefore, there is a problem in that the bottom wall and the peripheral wall cannot be thermally sprayed continuously.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a rod-shaped lance body with an obliquely bent tip, a burner with an obliquely bent base end, and and a burner are each formed of a multi-pipe structure, the tip of the lance body and the base end of the burner are concentrically and rotatably connected to each other, a rotational drive shaft is provided inside the lance body, and the base is connected to the inside of the burner. A driven part is provided that is rotationally driven by the drive shaft about the center line of the end, and the driven part and the drive shaft are connected to each other via a gear, and both the lance main body and the burner have multiple pipes. A cooling water passage is formed by the outermost space inside the structure, and the cooling water passage covers the drive shaft and the gear.

(Function) According to the above structure, by rotating the driven part by the drive shaft through the gear, the burner rotates around the inclined base end center line (joint center line), and the burner tip and thermal spray The direction of movement is on a conical surface centered on the joint center line. Therefore, the spraying direction of the burner can be adjusted between the direction in which the bottom wall of the converter or the like is sprayed and the direction in which the peripheral wall is sprayed.

The mechanism for adjusting the burner angle, i.e. the drive shaft and gears, is surrounded by a cooling water passage, which prevents these parts from being damaged by heat and ensures that their functionality is always maintained. .

(Example) In FIG. 2, which is a schematic side view, a burner 8 is connected to the tip of a rod-shaped lance body 5 via a joint 52. Although not shown, the lance main body 5 is inserted into the converter in a horizontal state with the burner 8 at the beginning. Also, the lance body 5
is held horizontally by a trolley (not shown). The burner 8 has a generally cylindrical shape, and is adapted to thermally spray the repair material from its tip in a direction along its center line B as shown by an arrow F.

The lance body 5 includes an obliquely bent distal end 50, and the burner 8 includes an obliquely bent proximal end 51. Lance tip 50 and burner base end 5
1 are concentrically and rotatably connected by a joint 52 with their end surfaces joined. Therefore, by rotating the burner proximal end 51 relative to the lance distal end 50 about the center line J of the joint 52 (the center line of the lance distal end 50 and the burner proximal end 51), the burner 8 main body can be rotated. The center line B moves along a conical surface with the joint center line J as the axis, and the center line B of the burner 8 and the spraying direction F are between a direction parallel to and a direction perpendicular to the center line L of the lance body 5. It changes with

As shown in FIG. 1, which is an enlarged cross-sectional view of FIG. 2, the lance tip 50 and the burner base end 51
are a plurality of tubes 60 to 65 and tubes 70 to 75, respectively.
It has a multi-tube structure with central tubes 60 and 7.
0 and tubes 61 to 6 excluding the outermost tubes 65 and 75
4, 71 to 74 are rotatably connected via seals. outermost tubes 65, 75
A cylindrical cover 76 is provided on the outside of the tube, and the inner circumferences of both ends of the cover 76 are rotatably fitted to the outer circumferences of the tubes 65 and 75 via seals.

The powder passage P is formed inside the tubes 60 and 70. Also, oxygen passage O, water supply passage Ws, gas passage G,
The drainage passage Wr is the middle pipe 62-64, 72-7
4, and is formed in an annular and concentric shape between the tubes 61, 71 and the outer tubes 65, 75.

The tip of the tube 64 is provided with an annular flange 77 or a boss that is integrally connected to the outer tube 65, and a small diameter shaft 80 is supported by the inner periphery of a hole 78 provided in the flange 77 via a bearing 79. . The end of the shaft 80 opposite to the burner 8 is connected to a drive mechanism (not shown) such as a motor via a joint 83 and a shaft 84. A pinion gear 81 is fixed to the end of the shaft 80 on the burner 8 side. The gear 81 meshes with an internally toothed gear 82 that is coaxial with the joint center line J. Gear 82 is connected to flange assembly 8 at the end of tube 74.
It is formed by the outer circumferential cylindrical part of 5. At the tip of the tube 65, the outer periphery of the annular stopper 87 is attached to a bolt 88.
Fixed by The stopper 87 engages with the outer peripheral portion of the flange assembly 85 from the side opposite to the gear 81.

An inward flange 89 is provided at the tip of the pipe 75 and continues integrally with the pipe 74, and a hole 90 for the drainage passage Wr is provided in the flange 89. Also, of the tube 65,
The part where the tip of the cover 76 fits and the flange 77
A hole 91 forming a part of the drainage passage Wr is also provided in the part between. Although not shown, the tube 6
0 to 65 and tubes 70 to 75 are each fixed to each other at portions not shown.

Also, as is clear from the above description, among the various particle passages formed inside the multi-pipe structure, the outermost passage is the cooling water passage Wr, and the joint 5
2. Heat transfer from the outside to the internal gas, oxygen, and powder is prevented as much as possible.

Next, the operation of the above embodiment will be explained. During the thermal spraying operation, powder, oxygen, and gas are supplied from the lance to the burner 8 through the inside of the joint 52, and the powder is thermally sprayed from the tip of the burner 8 onto the inner surface of the converter 3. In that case, the shaft 80 connects the pipe 7 through gears 81 and 82.
4 (driven part), the burner 8 rotates around the joint center line J, and the posture of the burner 8 changes between the posture shown by the solid line and the posture shown by the two-dot chain line in FIG. The thermal spraying direction F changes accordingly.

(Effects of the Invention) As explained above, according to the present invention, since the angle of the burner 8 at the tip of the lance can be adjusted, it is possible to spray each part of the converter (peripheral wall and bottom wall) with the common burner 8. can. Therefore, the conventional burner replacement work is no longer necessary, and work efficiency can be improved.

Further, according to the present invention, the lance main body 5 and the burner 8 are each formed by a multi-pipe structure, and both are concentrically connected at the bent portion, and the cooling water passage is formed by the outermost space inside the multi-pipe structure. Wr.
, and the burner 8 is connected by the cooling water passage Wr.
A mechanism for adjusting the angle of the drive shaft 8
0 and gears 81 and 82. Therefore, these parts are prevented from being damaged by heat,
These functions can be maintained reliably at all times.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a schematic side view of the embodiment of the present invention. 5... Lance body, 8... Burner, 50...
Lance body tip, 51...burner base end, 8
0... Drive shaft, 81, 82... Gear, 74... Pipe (driven part), F... Burner spraying direction, J...
...Burner joint center line, L...Lance body center line, Wr...Drainage passage.

Claims (1)

[Claims] 1 A rod-shaped lance body is provided with an obliquely bent tip, a burner is provided with an obliquely bent base end,
The lance body and the burner are each formed of a multi-pipe structure, the tip of the lance body and the base end of the burner are concentrically and rotatably connected to each other, a rotational drive shaft is provided inside the lance body, and a rotary drive shaft is provided inside the burner. providing a driven part that is rotationally driven by the drive shaft about the center line of the base end, and connecting the driven part and the drive shaft to each other via a gear;
A cooling water passage is formed by the outermost space inside the multi-tube structure of both the lance body and the burner,
A thermal spraying direction variable lance device, characterized in that the cooling water passage covers the drive shaft and the gear.