Device for vacuum generation

A technology for generating device and vacuum, applied in valve devices, valve details, multi-port valves, etc., can solve problems such as failure, drop, pressure drop can no longer be compensated, etc., to prevent the decrease of vacuum degree and production work costs. Less, save the effect of compressed air
CN101796334AInactive Publication Date: 2010-08-04FESTO AG & CO KG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FESTO AG & CO KG
Publication Date
2010-08-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A device for vacuum generation is proposed, said device comprising a valve device (3) having a valve member (11) that can be switched between a base position and a working position. The valve member (11) is associated with two oppositely oriented and differently sized actuating surfaces (54, 55), which can each be subjected to control air, controlled by an electro-pneumatic pilot control valve (6, 7). Using spring means (44), the valve member (11) is supported with respect to the larger actuating surface (55). By simultaneously actuating both pilot control valves (6, 7), the spring means (44) are tensioned in the base position and during subsequent power failure switch the valve member (11) back into the working position.
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Description

technical field

[0001] The invention relates to a vacuum generating device having an electrically operable valve unit, the valve element of which enables a working channel for supplying air of an ejection device generating a vacuum in a suction device to be selectively in the basic position shut off the air supply channel connected to the compressed air source or switch on the air supply channel in the working position. Background technique

[0002] The vacuum generating device proposed in DE 10009167B4 comprises a valve unit consisting of a 2 / 2-way control valve, which allows the inlet of the injection device to be selectively communicated with an air supply channel connected to a compressed air source ( working position) or shut off with this air supply channel (basic position). In the operating position, the compressed air flowing through the spray device generates a vacuum in a suction device, such as a suction cup, which is connected to the spray device on the suction ...

Claims

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