DE2658507A1 - Appts. for metering metal melts - including supply pipe projecting into metering vessel at level according to desired filling level - Google Patents

Abstract

Device for metering metal metals consisting of a metering vessel connected to the melt vessel by a supply pipe which projects into the metering vessel to the level corresp. to the desired filling level. The latter vessel has an outlet for the measured quantity of metal that can be immediately above its base.

Description

Additional patent application to

Dosing device for molten metal without moving parts, also for subsequent use Suitable for installation in metal melting furnaces.

Device for dosing molten metal, consisting of a Dosing container 2, which is connected to container 1 (melting furnace, holding furnace) via a feed line 4 is connected, in the following way: The lead 4 protrudes into the actual Space of the dosing tank in so far that the end of the supply line is in height the desired FUlShöhe of the metering cell 2 or its insert 16 is located.

The outlet 25 is located with its opening inside the dosing cell directly above the bottom of the dosing tank or

of his commitment.

The dosing system has the following function: The metal in the melting container 1 is conveyed to 2 via feed line 4. This can be done in 2 different ways take place: 1) An overpressure generated in the container causes the melt of 1 after 2 over 4 is promoted.

2) A negative pressure generated in the container 2 causes the in the container 1 acting air pressure that transports the melt from 1 to 2 via 4.

In principle, neither of the two options can be given preference will. Depending on the requirements at the place of use, 1 or 2 can be the most economical Be the solution.

to 1) see sketch I) Function: An overpressure generated in 1 fills the dosing cell 2. After a prescribed filling level has been reached in the dosing cell 2 H '> H has been reached, the overpressure in 1 is abruptly interrupted.

The melt that is located above the off-line of the supply line runs via 4 back to 1. This means that after the filling process there is always the same volume Metal is in the dispensing container.

Now the actual dosing process begins.

An overpressure generated in 2 conveys the melt from 2 via 25 to the Channel 30 (with a gas-tight cover) that guides the metal to the tool. To a To prevent oxidation during the dosing process is via line 33 with the help a throttle valve a slight overpressure in the outlet 25, channel 30 with an opposite Aluminum maintain neutral gases to prevent atmospheric oxygen reaches the dosed metal. The overpressure is also during the filling process maintain.

The metal to be dosed, which is conveyed through the outlet, can can be measured in a wide variety of ways: Here are just a few possibilities are listed.

1) Weighing mechanically, electronically 2) Volume determination (metal mirror) 3) Capacitive (mass (liquid metal) in the dosing tank is determined by capacitive measurement determined 4) Inductive measurement (mass in the dosing container is determined by inductive measurement determined.

Once the desired amount of metal has been conveyed out of the dosing container 2, the overpressure is suddenly interrupted in 2 and at the same time a pressure equalization valve 14 opened to relieve the overpressure immediately.

After completion of the dosing process, a new filling process can take place.

to 2) Sketch II melt is conveyed from 1 to 2 in that first at outlet 25 the sealing device 7 is actuated, that is, closed will. The negative pressure now generated in 2 causes the air pressure that prevails over 1 the melt is conveyed from 1 to 2 until a predetermined value is reached in 2 Filling level H '> H is reached.

A sudden short overpressure in 2 and on the sealing device 6 not only causes the supply to be interrupted, but also that the metal that is above the filling level H, runs back into the melting container 1. The one on the sealing device applied overpressure prevents the seal, as well as slide with liquid Metal is wetted.

tin in 2 has reached molten metal level II, the actual 2 surface begins Dosing process.

next the sealing device 6 opens.

in excess pressure applied in FIG. 2 conveys the melt via 26 to the Gutter.

As in 1), the dosing amount can be varied in various ways be measured.

Once the desired amount of metal has been pressed out of the dosing container, the further discharge is suddenly prevented by a negative pressure.

The sealing device 6 closes at 25, and a new filling process can start.

Designation from sketch 1) Sheet no. Õ 1 container for molten metal 2 dosing tank 3 supply lines for overpressure 4 supply line) \ rtallschmelze 10 input device (Master device) 11 regulator (control device) 12 transmitter 14 actuator 15 overpressure line 16 Heat-resistant crucible 17 Electronic measuring transducer for capacitive measurement 25 Outlet 30 Channel 31 Throttle valve 32 Tool designation from sketch 2) Sheet No. 7 1 container 2 Dosing tank 3 Supply line for excess and negative pressure 4 Supply line for molten metal 6 Sealing device 7 Actuator 8 Transmitter 9 Channel 10 Input unit 11 Controller 12 Transmitter 13 Overpressure line 14 Actuator 15 Underpressure line 16 Heat resistant Crucible 17 Electronic measuring transducer for capacitive measurement 25 Outlet

Claims (1)

Claims 1) Device for dosing molten metal, consisting of a dosing tank which is connected to the tank for molten metal via a feed line is connected, the metered metal via an outlet from the metering container flows out, characterized in that the feed line 4 projects into the metering container 2 with its opening so far that the opening height of the supply line exactly matches the (desired) filling level of the dosing container. at 2) device characterized in that the leading to the outside Drain line marked with drain 25, its opening directly above the Edden det dosing container or its crucible insert is attached.