Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1992-08-03
1993-08-17
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
Including solenoid
25112915, 2395851, 2395854, 2395855, F16K 3106, B05B 132
Patent
active
052361748
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on an electromagnetically operable valve. An electromagnetically operable valve has already been proposed in German Patent Application P 38 25 135.3, U.S. Pat. No. 4,967,966 in which soldering or welding of the armature to the connecting pipe, of the guide element to the core and to the connecting part, of the intermediate part to the core end and to the connecting part, and of the connecting part to the valve seating body are carried out. Because of the space requirement to be provided for the soldering or welding seams, the valve manufactured in this way has a large installed volume. During welding, there is a risk of the parts to be welded to one another deforming because of thermally induced stresses, but also of the necessary reliability of the connection not being ensured in the case of relatively large wall thicknesses of the parts which project over one another.
ADVANTAGES OF THE INVENTION
The valve according to the invention, has the advantage that reliable welding can be achieved and that the valve can be manufactured with relatively small dimensions in the radial and axial direction. The simplified welding in a reduction in cross-section permits a reduction in the heating of the parts to be welded and at the same time forms a safe and reliable connection. Deformation of the parts because of the temperature effect is thus largely prevented.
Advantageous developments and improvements of the valve specified are possible by means of the measures outlined hereinafter.
It is particularly advantageous to construct the reduction in cross-section as a welded groove which lies in the vicinity of one end of a part to be welded and is bounded at this end by a reinforcing collar. The welded groove according to the invention is not only easy to produce but the reinforcing collar is used at the same time as protection for the welded seam and the small wall thickness in the region of the reduction in cross-section. The position of the welded groove and hence also of the welded seam in the vicinity of the ends of the one part to be welded ensure a reliable connection.
It is also advantageous if the reinforcing collar has an insertion stage and/or a chamfer towards a central opening, in order to facilitate easier pushing together of two cylindrical or pipe-shaped parts which are to be welded to one another.
It is likewise advantageous if the valve seating body has a circumferential groove between the valve seat and a welded seam connecting the valve seating body to the connecting part. This reduction in the cross-sectional area reduces the heat flow during welding from the welded seam into the valve seat of the valve seating body, so that warping of the valve seat as a result of thermally induced stresses is prevented.
In this case it is advantageous if the cross-sectional area of the valve seating body between a treatment hole in the valve seating body and a groove base of the circumferential groove is less than one quarter of the cross-sectional area of the valve seating body which is formed between the contact line of the valve closing body resting against the valve seating area and the circumference of the valve seating body, in order to reduce the heat flow as much as possible, but without endangering the stability of the valve seating body.
It is particularly advantageous if the wall thickness of the reduction in cross-section of the one part to be welded is approximately 0.3 mm in the region of the weld, so that, on the one hand, a reliable weld is ensured, but on the other hand only a reduced heat supply is required during welding, because of the reduced wall thickness.
It is also advantageous if the wall thickness of the reduction in cross-section of the one part to be welded is significantly less than the wall thickness of the other part to be welded in the region of the weld, so that a reliable weld and the necessary heat dissipation are ensured by the considerably greater wall thickness of the other part.
It is particularly advantageous to provide a hollow identifi
REFERENCES:
patent: 4915350 (1990-04-01), Babitzka et al.
patent: 4944486 (1990-07-01), Babitzka
patent: 5170987 (1992-12-01), Krauss et al.
Babitzka Rudolf
Reiter Ferdinand
Vogt Dieter
Greigg Edwin E.
Greigg Ronald E.
Robert & Bosch GmbH
Rosenthal Arnold
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