SU60703A1 - Device for cleaning casting ditches from scrap - Google Patents

Description

Cleaning the ditches of the blast furnace of the blast furnace after the release of iron in many cases is done manually, takes a lot of time and labor, and often causes a break in the production schedule of iron, which, in turn, reduces the productivity of the furnace.

There are bridge cranes on large blast furnaces to service foundry yards.

These cranes can lift loads, carry them, but cannot remove scrap from trenches without prior manual preparation. Therefore, it was suggested that grab claws be used to mechanize this work. To open and close the jaws of these grabs, engines are used, including pneumatic ones, mounted on the grab itself.

The proposed device, which aims to clean casting ditches from scrap, is also made in the form of a grab with a separate pneumatic or electric motor for opening and closing the grapple jaws. However, it differs from conventional grabs with an engine of the type indicated above by using an additional percussion motor, for example, a pneumatic or electric hammer, designed for driving the jaws of the grapple under pieces of scrap. This makes it easier to break off pieces of scrap, and the work of the grapple is made more productive. In addition, a special chisel for crushing pieces of scrap is also driven by the same additional motor.

FIG. 1 shows a view of the entire device in one of its forms; in fig. 2 - type of striker; in fig. 3 is a view of the grapple jaws equipped with shovels for better pick-up of scrap.

The device is a body hingedly hinged to the loop / on two legs 2, consisting of cylinder 3, cover 4 and bottom 5 of ferromagnetic material, screwed together by bolts 21, all the internal space of cylinder 3 by jumper 5 being divided into two chambers , in which electromagnetic coils are placed - top 6 and bottom 7. A core 8 of ferromagnetic material passes through the upper coil 6, the upper one projecting

No. 60703-2 outside (in its upper position) the end of which is closed from the outside by a casing 9 for protection against the circuit entering the device. The core 8 moves in the lid 4 and the bridge 5, as in the guides.

The core 8 forming the firing pin or hammer is loosely mounted on the through-core center pivot 10 of the stem 1, for which the guide serves as the bottom. The rod / s and the brush 11 are made of a non-magnetic material. The rod is equipped with a flange 12, limiting the movement of it and the rod up. At the upper end of the rod 10, a head 13 is fixed, limiting the movement of the striker 8 upwards.

A chisel 15 is attached to the shaft 11 with the aid of a pawl 14 (Fig. 2).

The jaws 16 of the grapple, connected to each other and to the rod 11 by means of the hinge 17, are two shoulders, levers opposite to the working ends, the shoulders of which are hinged to the hinges 18 suspended on the pins 19 to the top of the cylinder.

The entire device, with the aid of the loop U, is placed on the hook of the bridge crane and installed above the ditch. Then, the upper coil 6 is turned on, which pulls the core 8 upwards. Together with it, the head 13 also rises, dragging the rod 10 and the rod 11 with the joint 17, which causes the grapples 16 to move apart. In this position, the device is lowered onto the ditch by a crane. Then, the switch is turned off and, with the help of a contactor, periodic short-term switching on of the upper or lower coil is performed.

When the upper coil 6 is turned on for a short time, the core 8 rises but does not have time to lift the head 13 and the next then turn on the lower coil 7 strikes the brush //, thus breaking up the scrap and driving the ends of the jaws under its pieces. For better gripping of the scrap, the jaws can be equipped with shovels 20 (Fig. 3).

FIG. Figure 1 shows the position of the device when the jaws are opened and the dotted line when the jaws are closed.

When the jaws are clogged under the scrap, the lower coil is permanently turned on to keep the jaws in a flattened state, and the grapple is lifted by the crane, which causes an additional compression of the jaws on the weight of the load.

Subject invention

Claims (2)

1. A device for cleaning casting ditches from scrap, made in the form of a grapple with a separate motor for opening and closing the jaws mounted on the grapple itself, characterized in that, in order to facilitate chipping of scrap pieces, an additional percussion motor, for example, pneumatic or electromagnetic hammer, which clog the jaws of the grapple under pieces of scrap. 2. Use in the device according to claim 1 for crushing pieces of chisel scrap driven by that engine. Js ig J . 12 3 /; J / j -2 ig.2 9W2.J