Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Material level or thickness responsive
Patent
1993-10-08
1995-06-06
Drodge, Joseph W.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Material level or thickness responsive
4263, 210 94, 210232, 210261, 433 92, 738665, B01D 2132
Patent
active
054219965
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a separator for separating a solid-liquid mixture, in particular the waste water originating from dental practice, with an inlet for the mixture that is to be separated, with an outlet for the liquid that has been separated off, and with a removable settling container for the solids, with at least one moveable locking element that, when in the open position permits removal of the settling container and in the closed position locks the settling container to the separator, and with a sensing system to identify at least one pre-set level of its contents. In addition, it is preferred that the separator incorporate a settling tank that has light-permeable walls and a sensing system that incorporates at least one light barrier.
A separator of this kind is described, for example, in the technical handbook for the "Metasys Multi-system Type 1" amalgam separator (May 1990) by Metasys Produktionsegellschaft m.b.H. & Co. KG, Innsbruck. This separator incorporates a mounting for the settling tank on which a printed circuit is mounted, this printed circuit extending parallel to the settling tank. The sensor system extends from this, and when the settling tank is installed, this identifies first the 95% level and then the maximum level. Snap fasteners which overcome a dead point are provided to fix the settling tank to the separator. The installation of the sensing system on the circuit board requires a relatively unprotected arrangement and it is the task of the present invention to create a separator in which this disadvantage has been eliminated. According to the present invention, this has been achieved in that the sensor system is arranged on the moveable locking element.
Because of the arrangement of the sensor system on the locking element, this is spatially separated from the circuit board so that it can be better protected when installed. There is no longer any requirement for a dedicated mounting for the sensor system because the locking element must at least partially overlap the settling tank. Because of the fact that it has to be fitted to the side of the locking element that faces the settling tank, the sensor system is covered by this to the outside and is similarly protected by this.
In a preferred embodiment in which the settling tank incorporates a light-permeable wall and at least one light barrier as a sensing device, provision is made such that the locking element is configured as a pivoting bale that has pivoting arms that are hinged onto it on both sides of the settling tank and in that the sensor elements of each light barrier is arranged on the parts of the pivoting bale that extend perpendicular to the pivot axis.
Because of the fact that, in order to provide for the most trouble-free identification of the level in the settling tank, it is more favourable to monitor a part area of the settling tank, it is preferred that this be provided with a rib that projects from a side wall and which can be overlapped by the sensing system. Then, according to the present invention, the pivoting bale incorporates a cross-piece that joins the pivot arms and from which tabs extend parallel to the pivot arms, said arms, in the closed position, extending on both sides of the rib on which the sensor elements are arranged.
In particular, in this case, additional sensor elements can be provided on the pivoting bale to identify the liquid levels in the settling tank at which a pump that removes the liquid is started and stopped.
The present invention will be described in greater detal below on the basis of the drawings appended hereto and without being restricted to these.
FIGS. 1 and 2 show vertical cross-sections through a separator according to the present invention; and FIG. 3 shows a plan view of the installation housing of the separator.
The separator 1 comprises a settling 6 tank that is used to sediment the solids, and a full-casing centrifuge 5 that is incorporated in the through-flow direction, on the settling tank 60. Both are arranged on an installation housing 4 that can
REFERENCES:
patent: 3078579 (1963-02-01), Jones et al.
patent: 4564374 (1986-01-01), Hofmann
patent: 5018971 (1991-05-01), Trawoger et al.
"Technische Daten Einbauanleitung Betriebsanleitung Wartungsanleitung, Multi-System TYP 1", Institut fur Bautechnik, Berlin, Nov. 28, 1989.
Pregenzer Bruno
Trawoger Werner
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