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Multiway valve

A multi-way valve and valve box technology, applied in the field of multi-way valves, can solve problems such as different switching speeds, complex layout of control channels, etc., and achieve the effect of simple communication

Active Publication Date: 2012-12-12
FESTO AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For some control tasks there is the problem that the provision of differently sized loading surfaces in opposite directions on the operating piston leads to different switching speeds in the two switching directions
[0003] According to DE 200 15 905U1, although the two end sections of the spool correspond to an operating piston that controls one switching direction respectively, the same high switching speed in both switching directions can be achieved, but this usually results in a larger overall length and More complex arrangement of the control channels inside the valve box

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] The overall multi-way valve, designated by reference numeral 1 in the figures, is designed as a valve with three operating positions, for example as a 4 / 3-way valve. In its valve box 2, there are distributed an air supply channel 3 connected to an external pressure source, two working channels connected to an external user, and two exhaust channels 6, 7 leading to an external pressure drop, especially the atmosphere. Usually this multi-way valve 1 is operated with compressed air as the fluid pressure medium, and at this time, the discharge channels 6, 7 are exhaust channels. The user is, for example, a hydraulically actuated transmission.

[0024] The above-mentioned channels 3-7 respectively flow to the outer surface of the valve box 2, wherein at least the interface area between the air supply channel 3 and the two working channels 4, 5 is equipped with a connecting device such as a plug connector 8, which can realize fluid pipeline easily detachable connection.

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PUM

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Abstract

The invention relates to a multiway valve (1), the valve housing (2) thereof defining a housing recess (14) in which an axially movable valve slide (18) is arranged. The valve slide (18) comprises a control piston (22) and an actuating piston (24) arranged at the front end region (23) thereof. A rear application chamber (37) associated with the control piston (22), and an opposed front application chamber (38), are separated by the actuating piston (24), wherein said chambers can be subjected to a control fluid for switching the valve slide. In order to obtain equally high switching pressures, the rear application chamber (37) is connected to a rear end section (43) of the housing recess (14) via an internal connecting channel (44) of the control piston (22), wherein the control piston (22) projects freely into said recess.

Description

technical field [0001] The invention relates to a multi-way valve with a valve box, the valve box delimiting an elongated box cavity, in which a valve core switchable between a plurality of operating positions is arranged, the valve core has An elongated control piston for controlling the fluid quantity, which cooperates with a sealing surface arranged on the valve housing, and an operating piston, which is located in the front region of the control piston and forms a ring on the side of the control piston as a movable partition The rear pressurization chamber of the control piston forms a front pressurization chamber on the opposite side of the control piston, wherein the control piston extends into the rear end section of the valve cavity with its rear end area opposite to the operating piston as a free end Among them, two control valves are provided, through which the fluid pressure medium is controllably supplied to the two pressurized chambers to determine the operating p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/42
CPCF16K31/426F16K11/07
Inventor K·克斯滕F·拉普克G·博格达诺维奇
Owner FESTO AG & CO KG