Loading structure for a valve

• US 20060118752A1
• Filed: 11/29/2005
• Published: 06/08/2006
• Est. Priority Date: 12/07/2004
• Status: Abandoned Application

• Current Assignee: Metal Industries Research and Development Centre
• Original Assignee: Metal Industries Research and Development Centre
• Inventors: Tzu-Chun, Wang, Tin-Kai, Lin, Wen-Chin, Chiang
• Application Number:
  US11/290,246
• Publication Number:
  US 20060118752A1
• Time in Patent Office: Days
• US Class Current: 251/331
• CPC Class Codes: F16K 1/425 Attachment of the seat to the housing by plastical deformation, e.g. valve seat or housing being plastically deformed during mounting
• CPC Class Codes: F16K 29/00 Arrangements for movement of valve members other than for opening and closing the valve, e.g. for grinding-in, for preventing sticking
• CPC Class Codes: F16K 7/16 the diaphragm being mechanically actuated, e.g. by screw-spindle or cam

Abstract

A loading structure for a valve comprises: an anti-leak pad defined onto a valve body, a metal diaphragm and a compression member both above the anti-leak pad, a loading unit having an outwardly extended loading seat, a resilient element and a driving element which is above the diaphragm, a central shaft for driving said loading unit, wherein the resilient element is located at said loading seat, the loading seat for downward or upward moving and compressing the driving element of loading unit is arranged below the resilient element, whereby when the loading unit excessively urges the diaphragm to matingly engage with the anti-leak pad, enabling the counterforce of anti-leak pad to urge the driving element of loading unit to upwardly compress the resilient element in such a manner that the shock-absorbing and anti-elastic fatigue functions can be improved, thus providing a prolonged service life for the loading structure of valve.

Claims

1. A loading structure for a valve comprising:

an anti-leak pad defined onto a valve body, a diaphragm above the anti-leak pad, a compression member abutting against the periphery of diaphragm, a loading unit disposed above the diaphragm, wherein, a resilient element is disposed to the loading unit, a driving element is arranged below said resilient element, and one outwardly extended end of driving element matingly engages with the diaphragm 40, whereby enabling to prevent the elasticity fatigue of diaphragm due to being excessively urged, by using the shock-absorbing function of resilient element.

2. The loading structure for a valve as claimed in claim 1, wherein the diaphragm is made of metal.

3. The loading structure for a valve as claimed in claim 1, wherein the compression member is driven to move by a central shaft.

4. The loading structure for a valve as claimed in claim 1, wherein the resilient member is a spring or a disc spring.

5. The loading structure for a valve as claimed in claim 1, the resilient member is located in a loading seat of loading unit and one end thereof abuts against the driving element.

6. The loading structure for a valve as claimed in claim 1, wherein the top of compression member is screwedly retained by the shaft seat and a positioning screw bush, so as to further abuts against the periphery of diaphragm.

7. The loading structure for a valve as claimed in claim 1, wherein an annular recess is arranged at the bottom surface of compression member, so that the two sides of annular recess will respectively form an anti-leak surface as the compression member abuts against the periphery of diaphragm;

by using the respective anti-leak surfaces, a multi-seal effect will therefore occur.

8. The loading structure for a valve as claimed in claim 1, wherein a retaining groove for locking a hook portion of anti-leak pad is defined in the valve body.

9. The loading structure for a valve as claimed in claim 1, wherein a height difference is provided among the two walls of a retaining groove of valve body and the anti-leak pad, accordingly, when the diaphragm contacts with said two walls of retaining groove and the anti-leak pad respectively, a multi-seal isolation will therefore form.