Patent DE-102007047545-A1 (DE)
Title: Device for dosing and supplying low-viscous melts such as glass melts, comprises a dosing cell with a reception chamber, a dosing piston arranged within the reception chamber for altering outgoing mass-flow of the melt, and a piping system
Inventor: BOETTGER MICHAEL
IPC: C03B7/086
Filed: 2007-09-29
Abstract: The device for dosing and supplying low-viscous melts such as glass melts, comprises a dosing cell (11) with a reception chamber (12), a dosing piston (13) movably arranged within the reception chamber for altering the outgoing mass-flow of the melt, and a piping system adjacent to an outlet opening (15) for supplying the melt flowing from the outlet opening to a secondary process step. The reception chamber and the dosing piston are formed around a symmetrical axis in a rotational-symmetrical manner. The dosing cell is formed from two sections, which are connectable with one another. The device for dosing and supplying low-viscous melts such as glass melts, comprises a dosing cell (11) with a reception chamber (12), a dosing piston (13) movably arranged within the reception chamber for altering the outgoing mass-flow of the melt, and a piping system adjacent to an outlet opening (15) for supplying the melt flowing from the outlet opening to a secondary process step. The reception chamber and the dosing piston are formed around a symmetrical axis in a rotational-symmetrical manner. The dosing cell is formed from two sections, which are connectable with one another over flanges. A side wall (14) of the dosing cell limiting the reception chamber is formed in a first partial area in direction to the outlet opening at a first angle (alpha ) to the symmetrical axis in a conical manner, and is diverted into the area of the outlet opening for the formation of a bottom wall section in the direction to the symmetrical axis at a second angle (beta ) between the side wall and the symmetrical axis. The value of the second angle is larger than the value of the first angle. The outlet opening of the dosing cell is formed in the bottom wall section. The dosing piston has a first conical section corresponding to the geometry of the first conically extending partial area of the reception chamber, and a second conical section corresponding to the geometry of the bottom wall section of the reception chamber. The value of a first angle (alpha ') between the lateral line of the first conical section of the dosing piston and the symmetrical axis is smaller than the value of the first angle (alpha ). The value of a second angle (beta ') between the lateral line of the second conical section of the dosing piston and the symmetrical axis is smaller than the value of the second angle (beta ). The outlet opening in the bottom wall section is completely lockable by the dosing piston. The dosing cell is supported by environmental ceramics and is stationarily formed. The piping system is movably formed relative to the dosing cell and has pipeline sections with a funnel-shaped inlet nozzle for receiving the melt flowing from the outlet opening. The inlet nozzle of a first pipeline section is spaced apart from the outlet opening. The pipeline sections are pivotably connected with one another over coupling points. The connection of a second pipeline section takes place at the coupling point over an air gap. The piping system is electrically heatable. Each of the pipeline section is separately and indirectly heatable. A tube wall of the each pipeline section is formed and arranged as electrical heating element. The pipeline sections have feed flanges at the external circumference in the beginning area and in the end area for introducing hot stream. The pipeline system is heatable by indirect heating, which is formed as combination heating having resistance heating element and/or radiation element and/or electromagnetic induction heating. The pipeline system is indirectly heatable in the area of the inlet nozzle and/or in the area of the coupling point, and is covered with an insulating agent, which is an insulating concrete with embedded ceramic fibers.