JPH0469202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive mechanism for a raw material charging device in a bellless blast furnace.

[Conventional technology]

A material charging device for a bellless blast furnace is, for example, a charging chute that protrudes radially downward from the bottom of a vertical chute provided in the core of the blast furnace, and a lower chute that is tiltable is provided at the tip of the charging chute. The structure is such that the entire chute is rotated around the core and the lower chute is tilted in the radial direction of the furnace to charge raw materials into a predetermined position within the furnace.

As a drive mechanism for turning and tilting these chute, for example, Japanese Patent Publication No. 55-37564, 56-
There is a technique disclosed in publications such as No. 31322.

As shown in FIG. 6, the drive devices disclosed in these publications have a rotating disk 51 in the furnace mouth and
The raw material supply and distribution device is suspended below the rotary disk 51, and a device is provided above the rotary disk 51 so as to be able to rotate independently of the rotation of the disk. A toothed wheel 53 is mounted, and a shaft arrangement 54 is provided which extends through the rotary disc and is rotatably mounted therein and is driven by the toothed wheel 53. A tilting device 55 for angularly displacing the device is provided, and a main drive motor 56 and a transmission device 57 are provided to provide independent rotational movements to the rotating disk 51, toothed wheel 52, and shaft device 54. be.

[Problem to be solved by the invention]

By the way, in such a conventional drive device, a toothed wheel is provided on a rotating disk, and a transmission device is used to connect the rotating disk, the toothed wheel,
The mechanical transmission mechanism becomes complicated, such as by giving rotational motion to each shaft device independently, and the design and
Manufacturing and maintenance of the equipment after operation requires a lot of effort and expense, and it has long been desired to simplify the structure.

The present invention has been made in view of the above problems, and provides a drive mechanism for a raw material charging device that is simple and easy to manufacture and maintain.

[Means to solve the problem]

The present invention provides a raw material charging system in which a charging chute is attached to the core of a bell-less blast furnace that protrudes radially downward from the lower part of a vertical chute that is rotatably provided, and a lower chute that is tiltable is attached to the tip of the charging chute. The device includes a swing mechanism that rotates the chute by rotating a swing robot attached to the outer periphery of the vertical chute using a swing motor, and a tilting motor mounted on a swing base attached to the chute, with a power supply pipe running longitudinally through the vertical chute. and a tilting mechanism for tilting the lower chute by supplying power to the tilting motor through the supply pipe.
Further, the tilting motor is a hydraulic cylinder, and hydraulic pressure is supplied through a supply pipe to tilt the lower chute.

[Effect]

The chute of the charging device of the present invention is a side feed that receives raw materials through a vertical chute provided in the furnace core and charges the raw materials into the furnace from a lower chute installed at an eccentric position. The structure has a simple tilting drive mechanism in which a power supply is run vertically through a vertical chute, and a power line is passed from the outside through this supply pipe to supply power to a tilting motor installed on a swing base. The rotating motion is transmitted from a rotating motor installed outside the furnace via a rotating robot attached to the outer circumference of the vertical chute. Further, for the tilting operation of the lower chute, electric power is supplied to the tilting motor through the supply pipe to operate the tilting gear attached to the lower chute. In this way, the material is supplied to a predetermined position in the furnace by performing rotation and tilting at appropriate times.

〔Example〕

An embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing a chute drive mechanism in a material charging device for a bell-less blast furnace. In this embodiment, a motor cylinder is used for the tilting mechanism, and FIG. 2 is a drawing showing the details thereof.

The chute structure of this raw material charging device is such that first, a vertical chute 1 is rotatably provided in the reactor core, and a charging chute 2 protrudes radially from the lower end of the vertical chute 1.
is installed. Further, a lower chute 3 consisting of three stages is attached to the tip thereof, and the first stage chute 3a is perpendicular to the radial direction and has a predetermined inclination angle (inclination axis 8), and the lower chute 3 is located at approximately the center thereof. It is divided into two parts near the position, and the lower chute is rotatable around the tilting shaft 8. By rotating the first stage chute 3a around the tilting shaft 8, the second and third stage chute 3b, 3c
is tilted (oscillated) in the radial direction 9 of the furnace, and together with the rotation of the vertical chute 1, the three-stage chute 3c can charge raw materials at any position within the furnace.

In the rotating mechanism of these chute structures, a rotating robot 5 is attached to the outer periphery of a vertical chute 1, and the rotating robot 5 is rotationally driven via a gear 7 from a rotating motor 6 installed outside the furnace, thereby rotating the entire chute structure.

Further, the tilting mechanism has a power supply pipe 11 running vertically through the vertical chute 1, a tilting motor cylinder 13 installed on a swing base 12 that simultaneously rotates along with the chute structure, and a movable rod 14 of the cylinder 13. is fastened to a lever 15 attached to the lower chute of the first stage chute 3a, and power is supplied by a power cable guided inside the supply pipe 11 to cause the motor cylinder 13 to reciprocate. A torsional rotational force is applied to the chute 3a of the stage to tilt the lower chute 3.

FIG. 3 is a sectional view showing the details of the intake part provided at the top of the power supply pipe 11, which is divided into an intake part 21 for power supply and an intake part 22 for water supply, etc., and the position for power supply is indicated. for communication, each limit circuit,
Electric circuits for power supply are guided from the outside to the supply pipe 11 via slip rings 23a, 23b, and 23c, respectively, and cooling water, _N2 gas, etc. are guided via a rotary joint 24.

The supply pipe 11 forms a multiple pipe as shown in FIG.
b, _N2 gas supply pipe 25c, power cable pipe 25
d. It has a built-in communication cable tube 25e.

Note that the motor cylinder 13 may be replaced with a hydraulic cylinder. In this case, the rotary joint 24 and the supply pipe 11 are connected from an external hydraulic source.
The lower chute 3 can be tilted with a simple structure similar to the case of the motor cylinder 13.

In the above embodiment, the motor cylinder 13 is used for tilting the lower chute 3, but as another embodiment, the tilting may be performed directly by a motor or the like as shown in FIG. In this system, a motor 30 provided on the swing base 12 drives a worm gear 32 via a reducer 31 to apply rotational force to the chute 3a, and in this way, the motor 30 directly tilts the lower chute 3. .

〔Effect of the invention〕

As explained above, the chute drive mechanism according to the present invention eliminates the need for the conventionally used toothed wheel on a rotating disk, and also simplifies the gear structure for power transmission. The tilting mechanism can be simplified by running it vertically and supplying power from there, and the rotation and tilting can be easily matched, so that the function of charging raw materials can be fully performed. Therefore, the design and manufacture are easy, and maintenance of the equipment does not require much effort, and equipment costs and operating costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a chute drive mechanism which is an embodiment of the present invention, Fig. 2 is a detailed view of the main part of Fig. 1, and Fig. 3 is a sectional view showing details of the intake part of the power supply pipe. FIG. 4 is a cross-sectional view of a power supply pipe, FIG. 5 is a perspective view showing another embodiment of the tilting mechanism, and FIG. 6 is a perspective view showing an example of a conventional drive mechanism. 1...Vertical chute, 2...Charging chute, 3
...lower chute, 3a, 3b, 3c...lower 1st, 2nd, and 3rd stage chute, 5...rotating robot, 6...swinging motor, 7...gear, 8...
...Tilt axis, 9...Radial tilting (oscillation) range of the lower chute from the furnace center to the furnace wall, 11...Power supply pipe, 12...Swivel base, 13...Motor cylinder, 14...Movable Rod, 15...Lever, 21...Intake part for power supply, 22...Intake part for water supply, etc., 23a, 23b, 23c...Slip ring, 24...Rotary joint, 25a~
25e...Built-in supply pipe, 30...Motor, 3
1...Reduction gear, 32...Worm gear.

Claims (1)

[Scope of Claims] 1. A charging chute protruding radially downward from the bottom of a vertical chute rotatably provided in the core of a bell-less blast furnace is attached, and a lower chute that is tiltable is attached to the tip of the charging chute. In the raw material charging device, there is a turning mechanism that turns the chute by rotating a turning robot attached to the outer periphery of the vertical chute by a turning motor, and a turning mechanism that rotates the chute by a turning motor, and a turning mechanism that rotates the chute, and a rotating base attached to the chute with a power supply pipe running vertically through the vertical chute. A chute drive mechanism for a blast furnace raw material charging apparatus, characterized in that a tilting motor is installed in the shaft, and a tilting mechanism for tilting a lower chute by supplying power to the tilting motor through the supply pipe. 2. The chute drive mechanism for a blast furnace raw material charging apparatus according to claim 1, wherein the tilting motor is a hydraulic cylinder, and the lower chute is tilted by supplying hydraulic pressure through a supply pipe.