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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

Inactive Publication Date: 2010-08-04
FESTO AG & CO KG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If a power failure occurs during the operation of such a vacuum generating device, it can have adverse consequences: if the valve unit is of the "normally closed" type and is in the basic position It is no longer possible to compensate for the pressure drop generated in the valve unit, since the valve unit is kept in the basic position, so the sucked object will fall; if the valve unit is of the "normally open" type, the above-mentioned power failure causes it to switch to the working position, Although this prevents the objects being sucked from falling out, it results in a continuous supply of compressed air to the injection device and thus a considerable air consumption

Method used

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Examples

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Embodiment Construction

[0023] The vacuum generating device generally designated by the reference numeral 1 comprises, for example, a preferred functional block operating unit 2 to which a valve unit 3 and a pressure sensor device 4 are added.

[0024] exist figure 2 , 4 , 5, 7 and 8, the valve unit 3, which is again partially illustrated separately, is designed as a control structure, in particular as a combined unit consisting of a main valve 5 and a first and a second electric- Pneumatic control valves 6 and 7 are composed. The control valves 6 and 7 can form on one side a control unit which is retrofitted to the main valve 5 .

[0025] The two control valves 6 and 7 are respectively 3 / 2-way valves. they pass through the figure 1 Only the electrical connections 8 shown schematically in the figure implement electrical operation, and they are individually controllable. The operating state of the control valves 6 , 7 predetermines the actual operating state of the main valve 5 and the operating...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/07
CPCF16K27/003F16K11/0712F16K11/07
Inventor J·布伦纳G·博格达诺维滋
Owner FESTO AG & CO KG
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