Device to remove liquid and/or gas from containers destined for scrap

· '· Ί' ί 5. ί 'ί ίί:

• ti ■■ ■■ «·

The invention relates to a device for emptying of scrapping, liquid and / or gas receiving hollow bodies.

Hollow bodies of the aforementioned type often still contain considerable residual amounts of fuel or other explosive liquids or gases. When shredding such scrap pieces in so-called shredder plants (hammer crushers) such residues then form an explosive mixture with the atmospheric oxygen, which is ignited by flying sparks during metal crushing and causes dangerous explosions. So far, it is customary such hollow body or the like before feeding to the shredder by means of a pickaxe with bronze tip. Slit by hand and collect escaping liquid in collection containers. This is not without danger for the persons assigned to it, because it can also come thereby to the inflammation of the easily combustible materials.

The invention has for its object to provide a mechanical device for emptying of liquid and / or gas receiving hollow bodies, which can be operated from a safe distance or from an explosion-proof cabin out.

Erfindungsgerftäß this device is characterized by two opposing, relatively movable jaws, of which at least one jaw carries at least one, at least temporarily protruding into the space between the jaws mandrel for perforating the hollow body. The jaws clamp the interposed, to be emptied cavity

body between them, wherein at the same time or following the clamping of the mandrels or preferably pushed through the hollow body and pulled out again, so that in the hollow body contained liquid and / or gases can escape.

According to an additional development of the invention, each mandrel is under the influence of the Dornweg limiting overload protection. By this measure, breaks or destruction of the device when hitting one or more mandrels are avoided on an impenetrable obstacle by the brakes so braked no longer participate in the further movement of the or of the jaws.

Conveniently, the mandrels are driven by means of a respective attached to the associated jaws hydraulic cylinder. A hydraulic drive here offers the advantageous possibility of installing a pressure relief valve in the pressure supply line of the hydraulic cylinder as overload protection. If one of the mandrels encounters too much resistance, the pressure in the associated hydraulic cylinder rises to the set pressure of the pressure relief valve. The latter then opens and injects in a known manner hydraulic fluid into the hydraulic tank, so that the affected mandrel stops before the resistance, while the other mandrels penetrate the hollow body on. The mandrels are advantageously connected to the associated hydraulic cylinder so that they are formed as an extension of the piston rod of the hydraulic cylinder.

In an alternative embodiment of the device according to the invention may also be the mandrels bearing jaws simultaneously drive element of the mandrels. This assumes that the

III IMI

<III

»It« »( _t

ill till> Il Il ti

Protruding mandrels from the working surface of the baking to the maximum required working length of the mandrels and join the propulsion movement of the jaw against the hollow body to be perforated. However, the mandrels are not absolutely rigidly connected to the associated jaws, but in turn are in connection with an overload protection.

Advantageously, for this purpose as overload protection, the mandrel ends facing away from the space between the jaws are in each case designed as a piston rod of a gas spring attached to the jaws carrying the jaws. Such gas springs are set in a known manner so that the pressure medium is compressed in overload or displaced in a pressure accumulator, so that the pushed to a high resistance mandrel not in advance, unlike the other thorns.

Further details and advantages of the invention will be described below with reference to an embodiment shown in the drawing.

A first jaw 1 is stationary with several feet 2 on a foundation 3. A second jaw 4 is guided up and down on lateral columns 5, of which only one is shown. The columns 5 are each formed with a piston rod 6 as a hydraulic cylinder. The piston rods 6 are fixed to a support rod 7, 8, which is fixedly connected to the jaws 4. Thus, the jaws 4 can be moved up and down by means of the hydraulic cylinders 5, 6 "to firmly clamp the hollow body to be perforated, for example a fuel tank 9, or the end-of-life car 10 containing it, against the fixed jaw 1.

On the jaws 4 a plurality of hydraulic cylinders 11, 12 are attached. Behind these hydraulic cylinders, further identical hydraulic cylinders can be used with the same

■■ function written on the jaws 4 may be arranged. It is also possible to use more than two such hydraulic cylinders

, be set each other. The piston rods 11a. 12a of the hydraulic cylinders 11, 12 carry pointed spikes 13, 14. The latter have been retracted in the example shown in the space 15 between the jaws 1 and 4 and have the ^ fuel tank 9 pierced so that the fuel when retracting the mandrels 13, 14 expires , The leaked fuel gelgel over holes 16 in the jaw 1 in a located under the jaws 1 drip tray 17 to from there, eg to be removed for further use. On the jaw 4 is a constructed in a known manner hydraulic unit 18, which contains substantially the following, not shown operating elements.

A tank with hydraulic fluid, a pressure pump, the suction nozzle protrudes into the hydraulic fluid and a multi-way valve block which is suitable, either the Arbeitsv pressure lines 19, 20 or the RUckzugsleitungen 21, 22 of the hydraulic cylinder 11, 12 on the one hand with hydraulic fluid to supply or otherwise to switch to return to the tank of the hydraulic unit 18. In the same way, the f. Columns 5 to »Adjustment of the jaw 4 from hydraulikaggaggi ¬ egat 18 applied hydraulically.

In the working pressure lines 19, 20 of Hydrauliksy ^: ■ s 11, 12 each have a pressure relief valve 23, 24 arranged, which when exceeding a preset Ar-

Beitsdruckes in the associated hydraulic cylinder, the working pressure line 19 or 20 either shuts off or via a line 25, 26 switches to return to the tank. This causes that when a dome on a very resistant obstacle of the associated hydraulic cylinder 11 or 12 is depressurized, so that the mandrel stops or even can be pushed back, whereby damage to the device is avoided.

The device described above can also be operated with constantly extended thorns. For this purpose, the jaws 4 must then be raised so far that the hollow body 10 to be perforated can be placed under the mandrels 13, 14. Then the jaw 4 is lowered at shut-off working pressure lines 19, 20 and filled hydraulic cylinders 11, 12 by means of its hydraulic cylinders 5, 6, wherein the mandrels penetrate into the hollow body, perforate the tank 9 and the end-of-life car 10 also desires by means of the Baking 4 is compressed. The mandrels 13, 14 are aligned with the holes 16 in the jaw 1, so that they can not touch on the jaws 1 at a little further lowering of the jaw 4.

Should meet in this mode of operation of the mandrels 13, 14 to a high resistance, so again its associated pressure relief valve 23 or 24 and switches the associated hydraulic cylinder 11 or 12 via the tank leading to the line 25 or 26 to return, so that the associated mandrel 13 or 14 on further lowering dee jaw 4 in the cylinder 11 or 12 can retreat while displacing the hydraulic fluid therein.

In the mode of operation described last, instead of the hydraulic cylinders 11, 12 also externally identical looking gas springs can be used, wherein the space 15 between the jaws I₁ 4 opposite ends of the mandrels 13, 14 simultaneously act as a piston rod aer gas spring. In place of the hydraulic unit 18 then enters a pneumatic unit, with a pressure wind boiler, which is held by means of an air compressor at the desired working pressure and with the working pressure lines 19, 20 are connected, so that the gas springs are constantly under the working pressure. If an excessively high resistance now occurs at one of the mandrels 13, 14, this mandrel is pressed into the cylinder of the gas pressure spring while compressing the gaseous pressure medium. This occurring excesses of the working pressure can be compensated in a known manner by pressure relief valves.