JPH0129520Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a nozzle drive device for spraying monolithic refractories onto the furnace inner wall of a molten metal container. ,
The present invention relates to a spray nozzle drive device in which a rotating mechanism can be downsized.

Prior Art As is well known, the conditions that the lining refractories of molten metal containers such as ladles and tundishes are subjected to have changed due to advances in continuous casting, degassing casting methods, etc., such as high-temperature tapping and extended molten steel residence time. As conditions become more severe and the wear rate and wear pattern of lining refractories becomes more and more unbalanced, in order to extend their service life, equipment is being used to make spray-on monolithic refractories (hereinafter referred to as
The inner walls of the furnace are repaired using a spraying method in which spraying material (abbreviated as spray material) is applied.

The equipment used for this spraying method is that the molten metal container such as a ladle or tundish has a circular cross section, a side wall consisting of a long side and a short side, and a furnace bottom wall (bed surface).
In order to perform spraying efficiently while improving the adhesion rate, it is necessary to always keep the spray nozzle perpendicular to the spraying surface and spray the material. It is important that the spray nozzle can move while maintaining a constant angle and distance from the spraying surface.The spray nozzle can be set in any direction, angle, and distance, and one spray nozzle can cover the entire inner wall of the furnace. Special equipment is required to spray the material.

Therefore, when spraying the inner wall of the ladle, for example,
26517, "A spray repair device for refractory lining containers," and when spraying the inner wall of a tundish, for example, JP-A-58-
Like the ``tandish coating layer spraying device'' described in Publication No. 77753, it is based on the vertical movement and rotational movement of the spray nozzle, and is equipped with a rotating mechanism that rotates integrally with a vertical mechanism consisting of a vertically movable tube.
Devices equipped with mechanisms such as tilting or swinging have been adopted and have achieved excellent results.

Problems to be Solved by the Invention However, when an electric motor that rotates integrally with the rotating disk or an electric cylinder is installed on the rotating body as in the conventional device described above, there is no possibility of endless rotation and spray nozzles. In order to freely move up and down and swing, it is necessary to install a rotary power supply device using a slip ring, carbon brush, etc.

Also, when spraying the inner walls of a furnace, the spray nozzle may be frequently moved from side to side.
The rotation motor is constantly rotated forward and backward, but since it is a mechanism that rotates integrally with the vertical mechanism, when the vertical mechanism, which is a heavy object, rotates forward and backward, a large moment of inertia acts. This increases the load on the rotation mechanism and rotation motor, which may cause failure. Therefore, it becomes necessary to increase the strength of these components, which results in an unnecessarily large size. On the other hand, incorporating the vertical mechanism into the rotating mechanism inevitably increases the size of the rotating mechanism and increases the moment of inertia, which necessitates the need to increase the size of the rotating mechanism to increase its strength.

Means for Solving the Problems The present invention was made with the aim of solving these problems, and it provides a simple mechanism that separates the vertical movement and rotational movement of the spray nozzle. Furthermore, by adding a swinging mechanism, the moment of inertia during rotation is reduced, and a spray nozzle drive device is provided that satisfies various requirements for spray construction without installing an electric motor or an electric cylinder on the rotating body. It is something.

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

The spray nozzle drive device according to the present invention has a first
As shown in the side view of the case where the vertically telescopic multistage pipe has four stages, a vertically telescopic multistage pipe 2 that is vertically telescopic is provided at the tip of the arm 1, and a material supply hose 3 is provided inside the vertically telescopic multistage pipe 2. In addition to inserting the liquid supply hose 4, a rotating mechanism for rotating the spray nozzle 5 is surrounded by a box body 6 and arranged at the lower end, and the spray nozzle 5 is provided at the lower end of the rotating mechanism so as to be able to swing freely. It is being

The vertically telescopic multi-stage pipe 2 has at least two or more stages of component pipes 2-1, 2-2, 2-3, and 2-4 fitted concentrically in multiple stages, and is shown in FIG. 2 in the direction of arrow A in FIG. - As shown in the enlarged cross-sectional view of A, it is formed into a rectangular tube shape so as not to rotate in sync with the rotation mechanism described later, and the guide has respective component pipes 2-1, 2-2, 2-3,
A roller 7 is provided on each surface so that 2-4 can slide smoothly between them, and the roller 7 is freely expandable and contractable in the axial direction (vertical direction). Innermost component pipe 2-4
In this case, a wire rope wound around a hose hoisting drum and winch 8 provided at the tip of the arm 1 is inserted through each of the component pipes 2-1, 2-2, and 2-3 using the usual method of using bolts or the like. Therefore, the tip of the wire rope is fixed to the top of the innermost constituting tube 2-4 and suspended by the wire rope. Therefore, the vertically expandable and retractable multistage tube 2 can be freely expanded and contracted in the vertical direction by winding up and lowering the wire.

Inside the vertically telescopic multistage pipe 2, there is a material supply hose 3 whose base end is connected to a material supply device (not shown).
A liquid supply hose 4 whose base end is connected to a liquid supply device (not shown) such as water is passed through a pipe 9 provided at the top of the arm 1, and is inserted through a hose hoisting drum and winch 8. Component pipe 2-
It is fixed to the lower part of 4 by ordinary means using U bolts or the like. Hose hoisting drum and winch 8
As shown in the plan view in FIG.
1, bevel gear 12, bevel pinion 13, sprocket 14, chain 15, sprocket 16
It is made to conduct and rotate through the
When the material supply hose 3 and the liquid supply hose 4 are hoisted up by the hose hoisting drum and winch 8, they rise together with the vertically telescopic multistage pipe 2, and when they are lowered, they descend by their own weight without sagging. In order to smoothly raise and lower the wire drum, the center diameter of the wire drum on the winch side and the center diameter of the hose drum on the hose hoisting side should be made the same size as shown in the figure.

The rotation mechanism is disposed at the lower end of the vertically telescopic multi-stage pipe 2, surrounded by a box body 6 that also serves as a dustproof cover. That is, as shown in a vertical cross-sectional side view in FIG. 4, the rotation mechanism is provided with a spur gear 19 on the outer circumferential surface of a double pipe 18 disposed at the tip of the material supply hose 3 via a rotary joint 17. It is meshed with a pinion 21 provided at the tip of a drive shaft of a rotation motor 20 fixedly installed on the inner wall of the body 6, so that when the rotation motor 20 is driven, the double tube 18 rotates integrally. . The rotary joint 17 and the double pipe 18 are provided to prevent the material supply hose 3 and the liquid supply hose 4 from twisting during rotation, and to simplify the structure of the bearing section, which will be described later. For example, as shown in a vertical cross-sectional view in FIG. 5, 17 includes an outer ring 17-1 that is connected to the material supply hose 3 and does not rotate, and an outer ring 17-1 that rotates while conveying the spraying material that is pressure-fed through the material supply hose 3. If it is composed of an inner ring 17-2 and has a liquid flow path 17-5 that allows liquid such as water to flow between the outer ring 17-1 and the inner ring 17-2,
Generally available products can be used. The double pipe 18 consists of an outer pipe 18-1 and an inner pipe 18-2,
Both ends of the outer tube 18-1 are sealed to provide a liquid flow path 18-3 between the outer tube 18-1 and the inner tube 18-2,
The inner tube 18 is rotatably supported by a bearing 22-1 provided at the tip of a portal frame 23 fixedly installed inside the box 6 and a bearing 22-2 provided at the lower end of the box 6.
-2 upper end is inner ring 1 of rotary joint 17
It is fixed to the lower end of 7-2. The tip of the liquid supply hose 4 is connected to a rotary joint 17.
The liquid inlet 17-3 of the rotary joint 17 is connected to the upper part of the outer pipe 18-1 of the double pipe 18 by a liquid hose 4-1. The lower part of the outer pipe 18-1 of the double pipe 18 is connected to the liquid adder 24 provided at the lower part of the inner pipe 18-2 of the double pipe 18 by liquid hoses 4-1 and 4-2, thereby forming a liquid conduit.

The spray nozzle 5 bends the lower end of the inner tube 18-2 of the double tube 18 by 90 degrees, as shown in the front view in FIG.
It is rotatably provided so that the inflow port and the discharge port are deflected by 90° and can be oscillated downward from the horizontal direction within a range of 90°. Then, an electric swinging cylinder 25 is fixed to the gate-shaped frame 23, and the double pipe 18 is
Sleeve metal fitting 2 with a flange that is slidably inserted through the sleeve
7, a double pipe 18 and a collared sleeve hardware 2
An uneven portion is formed between the outer circumferential surface of the double pipe 18 and the inner circumferential surface of the collared sleeve metal fitting 27 so that the sleeve fitting 26 can be rotated integrally with the sleeve fitting 26. The flange sleeve hardware 27 and the spray nozzle 5 are freely locked, and the flange sleeve hardware 27 and the spray nozzle 5 can be oscillated by raising and lowering the flange sleeve hardware 27 using the oscillating electric cylinder 25. The upper end is secured to the lower end of the collared sleeve hardware 27 with a pin or the like, and the lower end is connected by a swinging rod 29 that is rotatable.

Function In the present invention configured as described above, the spraying material that is pressure-fed from the material supply device (not shown) through the material supply hose 4 is transferred to the inner ring 17-2 of the rotary joint 17 by the rotation motor 20. It passes through the inner pipe 18-2 of the double pipe 18 that rotates integrally with the collared sleeve hardware 27 and the spray nozzle 5, and connects the liquid supply hose 4 and rotary joint 17 from the liquid supply device (not shown). Liquid flow path 1
7-5, liquid such as water sent through the liquid hose 4-1, the liquid flow path 18-3 of the double pipe 18, and the liquid hose 4-2 is added from the liquid adder 24, kneaded, and blown. It can be sprayed from the discharge port of the spray nozzle 5, and the spray nozzle 5 is connected to the lifting motor 1.
0, the vertically telescoping multi-stage pipe 2 is expanded and contracted to raise and lower the swinging electric cylinder 2.
5 The expansion and contraction of the output shaft moves the collared sleeve hardware 27 upward and downward from the horizontal direction.
The rotation motor 20 and the nozzle can be oscillated at any angle within a range of 90° to reduce the moment of inertia caused by the rotational movement of the double pipe 18 and the spray nozzle 5 rotated by the rotation motor 20. It is possible to rotate the drive motor infinitely without installing it on a rotating body.

Furthermore, when the spray nozzle drive device of the present invention is attached to the tip of the arm of an existing spray nozzle drive device that is commonly used and can be operated freely back and forth and left and right, the cross section of the ladle etc. In spraying construction where the furnace body is circular or approximately rectangular such as a tundish, the front and back, left and right,
Of course, the spray nozzle 5 can be rotated downward from the horizontal direction at any angle while moving in the vertical direction, and can be rotated infinitely.

Effects of the invention As explained above, according to the invention, the rotating mechanism is constructed as a separate mechanism from the heavy vertical mechanism, so compared to conventional spraying equipment, the strength calculation standard of the rotating mechanism is The moment of inertia is approximately 1/4
The rotation mechanism can be made smaller with a simple mechanism. Also, the spray nozzle
By being able to swivel at any angle downward from the horizontal direction within a 90° range, one spray nozzle can be used for both side wall construction and hearth bottom wall construction, and it can also be rotated infinitely. Furthermore, since the motor and cylinders are located in the non-rotating body, there is no need for power supply cables, control cables, etc., energizing slip rings, carbon brushes, etc., making it cheaper, lighter, and more practical. The effect is also large.

[Brief explanation of the drawing]

Fig. 1 to Fig. 6 show examples of the present invention, Fig. 1 is a side view when the vertically telescopic multi-stage pipe has four stages, and Fig. 2 is an enlarged cross-sectional view taken along arrow A-A in Fig. 1. Figure 3 is a plan view of the hose hoisting drum and winch section, Figure 4 is a vertical cross-sectional side view of the rotation mechanism, Figure 5 is a diagram explaining the rotary joint, and Figure 6 is a plan view of the hose hoisting drum and winch section.
The figure is a front view of the spray nozzle section, and the symbols in the figure are as follows. 1... Arm, 2... Vertically telescopic multi-stage pipe, 3...
Material supply hose, 4...Liquid supply hose, 5...
Spray nozzle, 6...Box, 7...Roller, 8
... Hose hoisting drum and winch, 9 ... Pipe, 10 ... Lifting motor, 11 ... Shaft,
12...bevel gear, 13...bevel pinion,
14...Sprocket, 15...Chain, 16
...Sprocket, 17...Rotary joint, 18...Double pipe, 19...Spur gear, 20...
Rotating motor, 21... Pinion, 22... Bearing, 23... Portal frame, 24... Liquid adder, 25... Electric cylinder for swinging, 26... Sleeve bracket, 27... Sleeve with flange hardware,
28... Rotating rod, 29... Swinging rod.

Claims (1)

[Scope of utility model registration request] A vertically telescopic multi-stage pipe 2 that can be freely extended and contracted up and down is provided at the tip of the arm 1, and a material supply hose 3 and a liquid supply hose 4 are inserted into the vertically telescopic multi-stage pipe 2, and a spray nozzle 5 is rotated at the lower end. A spray nozzle drive device in which a rotating mechanism is surrounded by a box 6 and a spray nozzle 5 is swingably provided at the lower end of the rotating mechanism.