VALVE WITH PERFORATED RIBBON SILENCING ELEMENT

• US 3,722,854 A
• Filed: 12/01/1971
• Issued: 03/27/1973
• Est. Priority Date: 12/01/1971
• Status: Expired due to Term

• Current Assignee: Gary D. Parola
• Original Assignee: Gary D. Parola
• Inventors: Parola, Gary D.
• Primary Examiner(s): Klinksiek, Henry T.
• Application Number:
  US05/203,561
• Time in Patent Office: 482 Days
• Field of Search: 251/118,127,205,61 137/625.28,625.3,625.37 181/37,66,67 138/41,42,45,46
• US Class Current: 251/127
• CPC Class Codes: F16K 47/08 for decreasing pressure or noise level and having a throttling member separate from the closure member , e.g. screens, slots, labyrinths
• CPC Class Codes: Y10T 137/86718 Dividing into parallel flow paths with recombining
• CPC Class Codes: Y10T 137/86734 With metering feature

Abstract

The disclosure is of a silent valve in which outlet flow is in a radial direction. Intermediate the valve closure member and the outlet passage is an annular flow retarding member formed by a coiled ribbon of perforated sheet material wrapped onto itself in several layers with holes therethrough overlapping to form communicating orifices. Preferably, the ribbon is sufficiently thick that the holes form expansion chambers producing further energy loss. Holes across the width of the ribbon are uncovered progressively as the closure member moves toward open position.

Claims

1. A valve structure comprising:

a body having a centrally disposed inlet port, an outlet port, a flow passageway in said body from said inlet port toward said outlet port, at least a portion of said passageway extending radially, an annular flow retarding member in said portion of the passageway, a valve closure member operable to expose said flow retarding member progressively across its width for flow therethrough, said flow retarding member comprising;

a sleeve formed of a plurality of layers of sheet material, a multiplicity of through openings in each layer of said sleeve, the dimensions across said openings being greater than the spacing between them whereby openings in adjacent layers overlap.

2. The valve structure defined by claim 1 wherein:

at least one of said layers is relatively thick whereby each through opening therein functions as an expansion chamber for fluid entering the orifice formed with an opening it overlaps.

3. The valve structure defined by claim 1 wherein:

said flow retarding sleeve is formed by a coiled ribbon of perforated sheet material.

4. The valve structure defined by claim 3 wherein:

said sheet material is screening.

5. The valve structure defined by claim 1 including:

a flow distributing slot in at least one of said layers extending substantially around the circumference thereof.

6. The valve structure defined by claim 1 wherein:

said closure member is a valve plug movable axially to cover and uncover said inlet port, and including;

a cylindrical guide sleeve on which said flow retarding sleeve is carried, said guide sleeve having a plurality of holes therethrough to provide flow paths from within said guide sleeve outward through the through openings in said flow retarding sleeve.

7. The valve structure defined by claim 1 wherein:

said flow retarding sleeve is adjacent said inlet port and extends along less than the full stroke of valve plug movement, and including;

means providing high capacity flow after said valve plug moves beyond said flow retarding sleeve.

8. The valve structure defined by claim 1 wherein:

said closure member is a flexible sleeve and including;

a barrier between said inlet and outlet ports normally snugly embraced by said flexible sleeve, and said flow retardiNg sleeve is disposed downstream of said barrier.

9. The valve structure defined by claim 1 including:

means around one end of said barrier and blocking flow into through openings adjacent said one end.