Fluid handling – Systems – Multi-way valve unit
Patent
1995-04-06
1996-12-31
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
13759616, 137884, F15B 13043, F15B 1308
Patent
active
055884652
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a valve block In a valve block of this type known, for example, from U.S. Pat. No. 4,726,393, the pilot valves are screwed in the baseplate from the topside between the directional valves and the installation well and electromagnets are placed on the pilot valves level with the directional valves, the connecting plug arranged on the housing of the electromagnets being coupled to a plug socket inserted in the baseplate above the installation well. In the known valve block, the mounting of the directional valves, the pilot valves and their electromagnets on the baseplate is laborious and has to be carried out carefully.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a valve block, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a valve block in which a pilot valve and an electromagnet are arranged in a common housing which is arranged to bear with a lateral attachment face against an end face of an associated directional valve, a plate-shaped extension projecting laterally from the attachment face of the housing near an underside of the housing assigned to a connecting plug, so that the directional valve bears against the plate-shaped extension with its connection side, and the baseplate has passage bores congruent with the connecting orifices of the baseplate and of the directional valve.
When the valve block is designed in accordance with the present invention, it has the advantage that the individual directional valves and their pilot valves, together with the electromagnets, can, in each case, be mounted as a unit on the baseplate, the integrated plug connection additionally shortening and simplifying the mounting operation. Moreover, as regards the underside which is formed by the housing of the electromagnets pilot valves and by its one-piece extension and on which the plug projects, only very small tolerances have to be taken into account between the pneumatic passages and the electrical connections, since the connections are made in a single casting mould. The electrical connection can thus be sealed very easily, so that a very high degree of electrical protection is ensured. Even mounting by the customer is therefore possible, without the guaranteed degree of protection having to be restricted. Since the electromagnets of the pilot valves are completely surrounded by the housing, no live parts lead outwards, so that there is no need for a shock-proof plug.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Exemplary embodiments of the invention are illustrated in the drawing and are described in more detail below.
FIG. 1 shows a valve block in cross-section,
FIG. 2 shows a second exemplary embodiment of a valve block, partially in cross-section.
FIG. 3 shows another exemplary embodiment of the valve block in accordance with the present invention, in a perspective view.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
The valve block has a baseplate 1 and a plurality of directional valves 2 which are mounted parallel and next to one another on this and which are triggered by electromagnetically actuated pilot valves 3, 4 attached to these. There extend in the baseplate 1, in the longitudinal direction, a plurality of parallel ducts 11 to 15 for incoming and outgoing air and, in each case, two ducts 16, 17 for working air which extend transversely thereto and to which consumers are connected. Connected to the ducts 11 to 17 are blind bores 21 to 27, of which the orifices f
REFERENCES:
patent: 4726393 (1988-02-01), Herner
patent: 4889164 (1989-12-01), Hozumi et al.
Mayer Guenter
Witowski Edgar
Michalsky Gerald A.
Robert & Bosch GmbH
Striker Michael J.
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