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Manual operation device for electric pilot valve

A manual operation, pilot valve technology, applied in the direction of valve operation/release device, valve device, fluid pressure actuating device, etc., can solve the problems of restricting the combined engineering sequence, cumbersome steps, etc., and achieve the effect of convenient initial position setting

Inactive Publication Date: 2009-12-16
YOUNG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, when a positioner is installed on the pilot valve of the prior art, the initial position can only be set by an electric signal
This makes the steps of setting the initial position too cumbersome, and it is necessary to first install the control device that provides the electrical signal, etc., which limits the sequence of the combined project.

Method used

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  • Manual operation device for electric pilot valve
  • Manual operation device for electric pilot valve
  • Manual operation device for electric pilot valve

Examples

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the drawings, so as to understand the present invention more deeply.

[0023] refer to figure 2 , provides a pilot valve manual operation device 200 according to an embodiment of the present invention. In this embodiment, the manual operation device 200 is a push button switch. The device comprises: a body portion 202; a fluid input portion 204 connected to a first port of the piezoelectric element (not shown); a fluid output portion 206 connected to a second port of the piezoelectric element (not shown); Button part 208; shaft 210, which runs through the body part, and connects the button part and the base plate, and the outer diameter of the shaft is smaller than the inner diameter of the inner side wall of the body part; the base plate 212 connected to the drive shaft 210 below; and, the spring 214, which pressurizes The bottom plate 212 blocks fluid flow. In addition, on each connection ...

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PUM

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Abstract

The present invention discloses a manual operation device for electric pilot valve, comprising a fluid input part connecting to a first port of a piezoelectric member of the pilot valve; a fluid output part connecting to a second port of a piezoelectric member of the pilot valve; and a manual switch device, which forms a path for discharging the pressure fluid from the piezoelectric member outside through the output part in opening state, and closes the path in closing state. In addition, the invention further provides a detection method capable of detecting error reason of the pilot valve when the manual operation device for electric pilot valve breaks down.

Description

technical field [0001] The present invention relates generally to a pilot valve, and more particularly to a manually operated device for an electric pilot valve. Background technique [0002] The pilot valve controls the high-pressure fluid supplied from the servo motor to the piston and cylinder according to the external pressure in the oil hydraulic servo. Usually this pilot valve provides high pressure and high flow. Pilot valves have the advantage that they can control very high pressures or very large flows with a small and light operation. [0003] figure 1 A typical pilot valve 100 of the prior art is shown. The exemplary pilot valve includes a regulator 102 to adjust fluid pressure, a main pressure supply 104, a piezo 106 to turn fluid flow on or off, and a control device (not shown in the example) to provide an electrical signal to control the piezo. display), etc. [0004] As mentioned above, in the existing pilot valves, failures of the piezoelectric elements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F16K31/05
CPCF16K31/005F16K31/046F16K31/05F16K41/04
Inventor 闵斗基
Owner YOUNG TECH