SU40389A1 - Scraper device for cleaning m on the hearth of an open-hearth furnace - Google Patents

Description

The invention relates to a scraper device for cleaning m on a hearth of a open-hearth furnace, suspended from a charging machine and driven by a crank mechanism.

The proposed scraper device is provided with a template that slides along a bracket, fastened to a holder, fixed on the trunk of the charging machine, due to which the support and direction of the scraper rod as it moves is achieved.

In FIG. 1 is a side view of the scraper device; FIG. 2 shows it from above and FIG. 3 is a section along the line A A in FIG. one.

The proposed scraper device for cleaning m on the hearth of the open-hearth furnace is installed on a charging machine (a cartoon machine) in which working platform 4 is fixed to the shaft 5. 2 using a finger with a slider B.

Crank 2 receives rotation from gear 7, shaft 8, worm gear 9 and electric motor UBan of the motor connected to the shaft of the worm by a friction clutch / 7, which during shocks protects both the whole mechanism and the charging machine from overvoltages. The rocker 7 in its upper part has a series of holes a, b, c, which, when the curtain vibrates, describe the trajectories aa, bb, ev.

One of the holes (for example, b, as shown in the drawing) is fastened, using a roller with a handle 72, a removable rod 13 of box section, welded from two channels.

The other end of the rod 75 carries the template 14, with which it rests on the support bracket 75; the latter is fastened to the holder 16, which sits on the trunk 77 of the charging machine.

Inside the rod 75 (from the side of the yoke 16, a working body scraper is inserted.

It consists of a rod 18 fortified in rod 75 using a 7P wedge; At the other end of the rod 18, a wooden block 20 is reinforced, serving to push the molten metal out of the we.

Instead of wood, riveted asbestos plates can be used for this purpose.

In the process of formation, on the head of the open-hearth furnace, the working device of the device is introduced through the charging port into the furnace so that the wooden block 20 is located at the edge and then the motor 10 is activated.

Crank 2 should rotate clockwise; in this case, the faster movement of the scraper will correspond to its working stroke and slower movement to the reverse.

At the working stroke, the ejection of the molten metal with a wooden block 20 will occur from the hearth of the furnace.

Although the trajectory of the end of the scraper rod 13 is defined by the template T4 and the path of the leading point of the scenes a, b or c, but if the trap- The length of the trajectory, the pads 20 can be changed by moving the roller 12 into the holes a, b or S of the scenes /.

Under the action of high temperature, the stem J8 decomposes and the wood burns in 5-7 minutes, after which they should be replaced by knocking out a wedge 19.

The proposed device can also be used to clean the surface of the hearth.

The subject matter of the invention.

Claims (2)

1. A scraper device for cleaning m on the hearth of an open-hearth furnace installed on a charging machine (cartoon machine) with the scraper set in motion by means of a crank-and-rocker mechanism, characterized in that during its movement the scraper rod 13 is applied attached there is a replaceable template 14 sliding in the bracket 5, fastened to the holder 16 which is located on the trunk 17 of the charging machine. 2. In the device according to claim. 1, the use of shock absorbers 6 installed on the lower end / backstage. fig.Z til fn )