JPS634954Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a lifting device for lances.

(Conventional technology and its problems) When supplying auxiliary materials for refining such as powder or granules to molten metal in an electric furnace or the like, conventionally, a hose is generally connected to the rear end of the lance pipe, and a blowing tube is connected to this hose. The method used was to connect a material pressure-feeding device, have a worker hold the lance pipe, and insert the lance pipe into the molten metal to a certain depth through the opening of an electric furnace or the like.

However, lance pipes generally have a diameter of about 20
It is a metal tube of ~40 mm and 4 to 5 m long, and it is quite heavy, and it must be handled while being exposed to high temperatures while approaching the molten metal. Moreover, if the insertion point is changed, a long lance is needed each time. Since it was necessary to carry the pipe and approach the front of the furnace, there were problems in that workability and efficiency were extremely poor and it was also dangerous.

(Means for solving the problem) This invention was devised after repeated research in order to solve the above-mentioned problems. It can be inserted into and removed from the molten metal automatically while supporting it, and the insertion angle can be adjusted freely, and it is possible to freely respond to changes in the height of the furnace etc. It is an object of the present invention to provide a lifting device for lances that can freely correspond to the situation and purpose of addition.

In order to achieve the above object, the present invention provides a cylindrical casing equipped with a base part that is rotatable via a bearing disposed on a movable trolley, an elevating cylinder is inserted into this cylindrical casing, and A power cylinder for prone use is provided via a bracket that passes through the cylindrical casing from the cylinder, and a main body equipped with a feed roller and a press roller is pivotally attached to the tips of the power cylinder and the elevating cylinder. A lance lifting mechanism is attached, which includes an arm extending from the top and a lever with a roller whose upper part is pivotally supported.

(Example) Hereinafter, an example of the elevating device for lances according to the present invention will be described based on the accompanying drawings.

1 to 6 show an embodiment of the elevating device for lances according to the present invention. In FIG. 1, 1 is a molten metal container such as an electric furnace or a ladle, and 2 is a molten metal container 1. 3 is a molten metal opening, 4 is a lance pipe, and is made of a metal tube with a diameter of 20 to 40 mm and a length of 3 to 5 m. 5 is a lifting device according to the present invention.

FIGS. 2 to 6 show details of the lifting device, and 6 is a truck or base, and as shown in the figures, it may be directly equipped with moving elements 62 such as wheels or tires, or may be further equipped with a drive motor 63, or It is fixed onto another traveling vehicle via an anchor bolt or the like.

Reference numeral 8 denotes a pedestal (pillar), which stands upright on the above-mentioned truck so as to be able to rise and fall freely, and in the case shown in the figure, is further able to turn around a vertical axis.

Specifically, the pedestal 8 has a cylindrical casing 80 with a base part 81 formed at the lower end, and the base part 81 is supported by bearings 61, 61 disposed on the cart 6, so that it can be rotated, for example, 360 degrees. horizontal rotation is now possible.

Swinging may be done manually, but in the illustration,
A motor 30 and a driving gear 31 are provided on the trolley 6, and a driven gear 32 is attached to the outer periphery of the table part 81.

The elevating means consists of a jacking mechanism built into the cylindrical casing 80. Figures 2 and 6
The figure shows an example of this. First, a rotating shaft 40 is inserted concentrically into a cylindrical casing 80 and is supported by the cylindrical casing 80 by a thrust bearing 41.

A gear 42 is fixed to the intermediate outer periphery of the rotating shaft 40, and is rotated by a reversible motor 43 and a drive gear 44 mounted on a cylindrical casing. The rotating shaft 40 has a male thread 45 at least in its upper half, and an elevating cylinder 46 having a female thread 47 screwed into the male thread 45 is connected to the cylindrical casing 80.
A guide 82 extends vertically through the top of the cylindrical casing 80 and is provided on the outer periphery of the elevating tube 46.
A fitting roller 48 is attached.

Although the jack mechanism described above is of a screw type, it may also be a fluid pressure cylinder.

Reference numeral 9 denotes a main body, which has left and right support plates 91 and 92, and the lower portions of these support plates are pivotally connected to the pedestal 8 with pins 10. A bracket 83 is protruded from the elevating cylinder 46 so as to pass through the slit 84 of the cylindrical casing 80 of the frame 8, and a power cylinder 11 for prone movement is attached to this. Support plate 9
1 and 92, and the angle of the main body 9 with respect to the pedestal 8 can be arbitrarily set by operating the power cylinder 11. The support plate 91 is made to have a lower height than the other support plate 92, so that the lance pipe 4 can be easily set from the side.

A plurality of feed rollers 13 and 13 are disposed between the support plates 91 and 92 at a predetermined distance from each other, and are rotatably supported by the support plates 91 and 92 with a central axis. As a drive mechanism for the feed roller, a reversible motor 14 is mounted on the support plate 91, and sprockets 15, 15, 15' are attached to the central shaft protruding from the support plate 91, and the output shaft of the motor 14 is Chains 16, 16' are suspended between sprocket 141 and the sprocket, thereby rotating each feed roller 13, 13.

17 is a presser roller, which is connected to the feed rollers 13 and 1;
3, and the other support plate 9
The presser roller 17 is inserted into the elongated hole 18 formed in 2 with a support shaft 19, and the support shaft is elastically supported by a spring 21, so that the presser roller 17 becomes a cushion roller movable in a direction perpendicular to the axis. ing.

To explain the support mechanism using the spring in detail, first, the support shaft 19 has a bearing plate 191 in contact with the support plate 92.
A bracket 20 is provided via the
A second bracket 20' is protruded from the support plate 92 in parallel with the bracket 20, and the adjustment handle 22 is inserted through the bracket 20'.
A spring 21 is interposed between the handle 20 and the bracket 20', and a handle threaded portion 221 is screwed through the female thread of the bracket 20.

When this configuration is adopted, the handle head 2
Since the strength of the spring 21 is changed by the rotation of the lance pipe 20, it is possible to set the optimal pressing force and relief pressure according to the lance pipe diameter.

23 is a joint that connects the lance pipes 4, 2;
4 is a hose connected to the rear end of lance pipe 4, 2
Reference numeral 5 denotes a pressure-feeding device for materials to be blown, which is constructed of, for example, a tank with a built-in feeder, and is configured to continuously blow materials to a hose using compressed air. Of course, this pressure feeding device may be mounted on a truck.

Reference numeral 26 denotes a lance lifting mechanism attached to the main body 9, which includes an arm 27 extending rearward from the support plate 92, and a lever 28 whose upper part is pivotally attached to this arm 27 and a roller 29 is attached to the lower part. It is designed to stably support the lance pipe 4 before reaching the lance pipe 9.

(Function) As described above, the present invention uses the feed rollers 13, 13.
Since the main body 9 with the presser roller 17 attached thereto is pivotally attached to the pedestal 8, and the pedestal 8 is erected on the trolley 6,
It can be moved freely using the trolley 6, and can be stored in a standby space when no blowing work is being performed.

When in use, the lance pipe 4 is positioned at a suitable location outside the molten metal container 1 using the cart 6 as shown in FIG. Then, connect the hose 24 to the rear end of the lance pipe 4, and
When driven, the feed rollers 13, 13 rotate,
In addition, since the holding roller is pulled in the direction of the feeding roller by the tensile force of the spring 21, the lance pipe 4 is sequentially fed out in the axial direction while being held down from the radial direction, and the pressure feeding device 25 is operated in parallel with this. The material is sent to the lance pipe 4 via the hose 24 and blown out from the tip thereof.

By the way, the installation height of the molten metal container 1 is various, and the opening position of the molten metal container 1 is also various,
Furthermore, the depth of injection of the material into the molten metal and the angle with respect to the horizontal and vertical lines also vary depending on the injection conditions.

In the present invention, the pedestal 8 that supports the main body 9 has a built-in jacking mechanism, and in the one shown in the figure, the rotating shaft 40 is driven by a reversible motor 43.
rotates in forward and reverse directions, whereby the elevating cylinder 46 moves up and down the cylindrical casing 80, and the height position of the entire main body changes with respect to the trolley 6.

Further, the main body 9 is pivotally attached to the pedestal 8, and
A power cylinder 11 is equipped, and this is the elevating cylinder 4.
The height changes according to 4.
Therefore, by operating the power cylinder 11, the main body 9 can be automatically tilted to any angle between the solid line state and the imaginary line state as shown in FIG.

Furthermore, the pedestal 8 is supported by the base portion 81 together with the trolley 6, and is rotatable in a vertical plane by the drive of the motor 30 or manually, so that the main body 9 can be freely swung around the pedestal.

Therefore, by simply controlling the motors 14, 30, 43 and the power cylinder 11 remotely, the lance pipe 4 can be moved in the axial direction (X-axis), in the Z-axis and Y-axis directions, and in the direction intersecting the axis. The movement of the lance pipe 4 can be freely combined and adjusted, and the lance pipe 4 can be inserted into the molten metal 3 from any horizontal distance and any height position relative to the molten metal container 1 at a desired depth and horizontal and vertical angles. I can do it. Further, when a plurality of molten metal containers 1 are adjacent to each other, materials can be easily injected using one unit.

In addition, even if the lance pipe 4 is shortened due to use and the next lance pipe 4 is connected with the joint 23,
Since the presser roller 17 is a cushion roller that is movable with respect to the main body 9, even if there is a step caused by the joint 23, it can be automatically absorbed and smooth feeding can be performed.

(Effects of the invention) According to the invention described above, the main body 9 equipped with the feed roller and the presser roller is not simply mounted on the movable trolley and pivotally mounted, but the bearing 61 disposed on the movable trolley 6 A cylindrical casing 80 with a rotatable base portion 81 is provided through the cylindrical casing 80, and the elevating tube 46 is inserted into the cylindrical casing 80. A power cylinder 11 for prone use is provided, and a main body 9 equipped with a feed roller and a press roller is pivotally connected to the power cylinder 11 and the tip of an elevating cylinder 46, and an arm 27 extending rearward is attached to the main body 9. A lance lifting mechanism 26 equipped with a lever 28 with a roller whose upper part is pivotally supported is attached to this, so the lance pipe can be moved forward and backward, prone, and raised and lowered while the movable trolley 6 is in a fixed position due to its compact structure. and can be rotated 360 degrees, thus making it easy to inject material from any angle and into multiple adjacent molten metal containers.

Moreover, since the vertical position of the elevating tube 46 is always changed while being inserted into the cylindrical casing 80, the center of gravity is low and stable, and the weight of the main body and the lance pipe does not wobble even when the weight of the lance pipe is large. 4 is always supported before reaching the main body, so even a long lance pipe does not dance, and excellent effects such as stable delivery can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the usage state of the elevating device for lances according to the present invention, Fig. 2 is a side view of the device of the present invention, Fig. 3 is a side view showing an enlarged upper part of Fig. 2, 4 is a plan view thereof, FIG. 5 is a front view thereof, and FIG. 6 is a sectional view of the lower part of the device. 4... Lance pipe, 6... Dolly, 8... Frame, 9... Main body, 11... Power cylinder, 1
3, 13...Feed roller, 17...Press roller,
21...Spring, 26...Lance suspension mechanism,
27... Arm, 28... Shiver, 29... Roller, 40... Rotating shaft, 43... Reversible motor, 44
...Elevating tube, 80...Tubular casing.

Claims (1)

[Scope of utility model registration request] A cylindrical casing 80 is provided with a base portion 81 that is rotatable via a bearing 61 disposed on the movable cart 6, and the elevating tube 4 is attached to the cylindrical casing 80.
6 is inserted, and a power cylinder 11 for lying down is provided via a brat that passes through the cylindrical casing 80 from the elevating tube 46, and a feed roller and a press roller are provided at the tips of the power cylinder 11 and the elevating tube 46. A main body 9 is pivotally connected to the main body 9, and the main body 9 is
A lifting device for lances, characterized in that a lance lifting mechanism 26 is attached to the arm 27 extending rearward and a lever 28 with a roller whose upper portion is pivotally supported.