JPS617053A - Tundish carrier with level adjusting mechanism - Google Patents

Abstract

PURPOSE:To permit the adjustment of the outflow port of a nozzle for a molten metal in a vertical direction by constituting a lifting frame for supporting a tundish via a trunnion in such a manner that said frame can be inclined relative to a tundish carriage frame by means of a level adjusting mechanism attached to te carriage frame. CONSTITUTION:The lifting frame 8 supports the tundish T via the trunnion 7. The frame 8 is made inclinable relative to the carriage frame 19 by means of the level adjusting mechanism attached to the frame 19 so that the outflow hole of the nozzle 4 for the molten metal can be adjusted in the vertical direction. More specifically, a space 17 is provided in the frame 19 to permit the movement of the bottom end of a lifting rod 18. A lifting shoe 16 is united to the front end of the rod 18 attached to the lifting jack 24 fixed to the frame 19 by means of a screw, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Related Technical Field) The present invention relates to an improvement of a tundish (molten metal container) truck used in a liquid (oil, water, gas) atomizing metal powder manufacturing apparatus.

(Prior Art) Conventionally, there was no one that added a level adjustment function to the tanditshu lifting frame attached to the tanditshu trolley. In tanditshu that are not level adjusted, the 6th
As shown in the figure, the molten metal outlet hole of the molten metal nozzle 4 may be inclined with respect to the vertical line.

If the metal powder is tilted in this way, the outflowing molten metal flow 5 will also be tilted, and the flow will be disturbed as shown in FIG. 6, and the shape and size of the atomized metal powder will not be as expected. Or it may clog the spray nozzle.

(Object of the invention) In order to solve the problems of the prior art, the present invention
A tundish level adjustment mechanism is provided to allow the molten metal flowing out from the molten metal nozzle to flow vertically.

(Summary of configuration) In the tanditshu truck used in the oil atomization type metal powder manufacturing equipment, the tanditshu lifting frame is
This is characterized in that the molten metal nozzle outflow hole can be adjusted in the vertical direction by tilting it with respect to the tanditshu truck frame.

■) Make the refractory thicker to prevent heat distortion from occurring in the tundish iron shell and replace it before it becomes thinner; 2) Lifting frame and trunnion This eliminates the need to adjust the level by inserting shims between the refractories, and 3) to devise ways to stretch the refractory so that the molten metal flows out in the vertical direction.

(Example) FIG. 6 T shows a tundish, and the molten metal 1 is housed in the tundish composed of a tundish shell 3 and a tundish refractory 2, and flows out from a molten metal nozzle 4 to become a molten metal stream 5. In this case, if the tundish is inclined, the molten metal flow 5 will not be vertical as shown in FIG. 7, but will be a turbulent flow.

The present invention is designed to prevent the flow of molten metal as shown in FIG. 6, and will be described below with reference to FIGS. 1 to 5. 7 is the tanditsu trunnion.

The trunnion is supported on a lifting frame 8. Note that although there are three trunnions 7 in the figure, the number may of course be greater than this.

The elevating frame 8 is vertically adjusted by level adjustment jacks 13 provided at its four corners. Two guide pins 9 are horizontally attached to the elevating frame 8. Furthermore, a guide shoe 10 is attached to the tip of the guide pin 9 at right angles thereto.

The guide shoe 10 is guided by the guide groove (2) of the elevating guide 11 and moves up and down.

In FIG. 2, the elevating frame 8 on which the tundish T is mounted is integrated by screwing or the like into the tip of a level adjusting rod 14 attached to a level adjusting jack 13 fixed thereto. A level adjustment shoe 15 is supported while riding on an elevating shoe 16.

A space 17 is provided in the truck frame 19 to allow the lower end of the lifting rod 18 to move. The elevating shoe 16 is integrated by screwing into the tip of an elevating rod 18 attached to an elevating jack 24 fixed to a bogie frame 19, and is driven by a drive mechanism (not shown) to a plurality of elevating shoes (generally a tundish shoe). All the lifting jacks on one truck are driven simultaneously to raise and lower the tanditsh-T.

Note that it is desirable that the contact surfaces of the level adjustment shoe 15 and the lifting shoe 16 be curved surfaces.

An axle 21 attached to the truck frame 19 via an axle 20 runs on a traveling rail 22 laid on a structure 23. Although not shown, the tanditshu cart is operated by a drive device (not shown).

In addition, due to the strength requirements of components such as the lifting jack 24 and the lifting rod 18, a square guide shoe 10 rotatably provided on a guide pin 9 protruding from the lifting frame 8 is attached to the guide groove 12 of the lifting guide 11. Although it is configured to slide inside, a circular roller or the like may also be used.

In this case, the dimensional difference between the width W of the guide shoe 10 (or diameter of the roller) and the width χ of the groove 12 of the elevation guide, that is, the gap can be determined as follows.

Figure 4 (elevating frame 8 and guide shoe 1 in Figure 2)
0 and the guide pins 9 are taken out), the distance A between the centers of the left and right guide pins 9 of the elevating frame 8a in the horizontal reference state is 3000 m or more, based on the size of the general tandish T. It often happens. Now suppose that A is 3000nTl and the level adjustment allowance is B=10mn in the figure.

The horizontal component C of the center distance between the left and right guide pins 9 of the inclined elevating frame 8b after level adjustment is C = 3000.
"-10' = 2999.983mmD=A-C=0
．． 017+m.

In other words, the increase in the margin (gap) of the groove width χ with respect to W, which is required due to the difference between the horizontal distance C and A, is not very large compared to the margin when the level is not adjusted.

In other words, by adding a level adjustment mechanism,
The amount of play between the lifting frame 8 and the truck frame 19 does not increase to the extent that it adversely affects the operation. In other words, it can be seen that there is no problem in practical use with the guide method shown in the figure.

In the above explanation, we have talked about screw level adjustment, but by making the axle of the traveling wheel an eccentric shaft, or by combining jacks with the axle and tilting the trolley frame, the outflow hole of the molten metal nozzle can be adjusted vertically. It is also conceivable that the adjustment method may be adjusted, and the adjustment method is not particularly limited.

Furthermore, although the above explanation has been about the tundish trolley of an oil atomized metal powder manufacturing device, it can also be applied to a tundish trolley of a water atomized or gas atomized metal powder manufacturing device or a tundish trolley of a commercial continuous casting facility. is possible.

(Function) Now, the molten metal nozzle 4 is caused by the deflection or thermal distortion of the tanditshu iron skin 3, or by the deflection or distortion of the structure 23, the truck frame 9 or the lifting frame 8 and other parts.
When the outflow hole is no longer vertical, the molten metal flow 5 as shown in Figure 6.
The molten metal flow 5 initially flows out in the same direction as the outflow hole, and then changes its direction in the vertical direction, so the molten metal flow 5 becomes small droplets.
It becomes easier to scatter. If the flow of molten metal is disturbed in this way, even if the metal powder collides with the oil jet produced by the spray nozzle (not shown), the shape and size of the metal powder may not be as expected, or in some cases, the metal powder may not be sprayed. This may clog the nozzle and make it impossible to operate.

When the level is adjusted by the level adjustment mechanism of the present invention and the outflow hole of the molten metal nozzle 4 is properly oriented vertically, the molten metal flow 5 flows out vertically as shown in FIG.

That is, since a good condition suitable for atomization can be obtained within a certain distance Q from the outlet of the outflow hole, it is sufficient to collide the oil jet within this distance Q.

To explain the specific level adjustment method below, if the perpendicularity between the surface of the molten metal nozzle 4 and the outflow hole is controlled, place a spirit level on the top surface of the molten metal nozzle and check the direction of the inclination. .

As shown in FIG. 1, one level adjustment jack 13 is installed at each of the four corners, and each can be adjusted independently using a screwdriver, spanner, etc. (not shown), so that the level can be adjusted independently. Just watch the container and adjust until the outflow hole is vertical.

(Effects) According to the present invention, by making the level adjustable, compared to the conventional one, 1) the refractory is made thicker in order to suppress the occurrence of thermal distortion in the tundish iron skin, and There is no need to replace it early.

2) There is no need to insert a shim between the lifting frame and the trunnion to adjust the level.

3) There is no need to devise ways to stretch the refractory so that the molten metal flows out in the vertical direction.

[Brief explanation of drawings]

FIG. 1 is a plan view of an elevating frame according to the present invention. Figure 2 is a partially cutaway side view of the Tanditshu trolley. Figure 3 is a right side view of Figure 2. FIG. 4 is an explanatory diagram of the adjustment method. FIG. 5 is a partial perspective view of the elevating frame. FIG. 6 shows the flow of molten metal from a tundish without adjustment. FIG. 7 shows the flow of molten metal from the tundish prepared according to the present invention. In the figure; T Tandish J Molten metal 2 Tandish refractory 3 Tandish iron skin 4 Molten metal nozzle 5 Molten metal flow 6 Molten metal flow 7 Tandish trunnions 8, 8a, 8b Elevating frame 9 Guide pin 10 Guide shoe 11 Elevating guide
12 Guide groove 13 Level adjustment jack 14 Level adjustment rod 15 Level adjustment shoe 1
6 Lifting shoe 17 Space]8 Lifting rod 19 Dolly frame 20 Axle
21 Axle 22 Running rail 23 Structure 24 Lifting jack Applicant Sumitomo Heavy Industries, Ltd. Sub-agent Patent attorney Isamu Ohashi Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] [1] The lifting frame that supports the tundish via the trunnion can be tilted with respect to the truck frame by a level adjustment mechanism attached to the tundish truck frame, and the molten metal nozzle outflow hole can be adjusted in the vertical direction. A tundish trolley with a level adjustment mechanism. [2] The tundish truck with a level adjustment mechanism according to claim [1], wherein the level adjustment mechanism is of a screw type. [3] The tundish truck with a level adjustment mechanism according to claim [1], wherein the level adjustment mechanism is adjusted by adjusting the axle of a running wheel attached to the truck frame.