Orifice trim and backpressure plate for high pressure valves

• US 4,249,574 A
• Filed: 03/09/1978
• Issued: 02/10/1981
• Est. Priority Date: 03/09/1978
• Status: Expired due to Term

• Current Assignee: Copes-Vulcan Inc.
• Original Assignee: Copes-Vulcan
• Inventors: Schnall, Ira H., Mott, Walter W.
• Primary Examiner(s): Rosenthal, Arnold
• Application Number:
  US05/884,913
• Time in Patent Office: 1,069 Days
• Field of Search: 137/625.3, 137/625.37, 137/625.38, 251/127, 138/42, 138/43
• US Class Current: 137/625.3
• CPC Class Codes: F15C 1/02 Details , e.g. special constructional devices for circuits with fluid elements, such as resistances, capacitive circuit elements; devices preventing reaction coupling in composite elements servomotor systems adapted for maintaining constant speed F15B11/05; Switch boards; Programme devices hydraulic programme control F15B21/02
• CPC Class Codes: F15C 3/00 Circuit elements having moving parts valves, construction of valves F16K
• CPC Class Codes: F16K 3/34 Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
• 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 137/86734 With metering feature
• CPC Class Codes: Y10T 137/86791 Piston

Abstract

A new and improved fluid restrictor means for use in a valve structure, as a backpressure plate, or the like and generally comprising a plurality of close-fitting mating cylindrical parts each of said parts including a plurality of openings spaced across the surface thereof. The mating parts are rigid in construction and arranged and configured whereby they are in a contacting relationship and the openings of contiguous mating parts are in an overlapping relation to form restricting orifices for flow communication between complementary openings. The volume of each of the openings is sufficient to form an expansion chamber for high pressure fluid flowing thrugh the restrictor means. The disclosed fluid restrictor means provides a structure which is easily arranged according to precise engineering specifications for a particular application. For example, all of the dimensions for the expansion chambers and restricting orifices are determined by the size of the openings in the mating parts, the thickness of the parts and the relative positions of the mating parts when in the final assembled form. These factors are determinable with great mathematical exactness and the present invention permits a highly precise implementation of the predetermined flow path characteristics into the structure of the disclosed fluid flow restrictor means.

Claims

1. In a passage-forming means for high pressure fluid flow, means to provide a controlled, gradual dissipation of fluid energy comprising

(a) a plurality of contacting, rigid mating parts arranged across the flow path of said passage-forming means, and

(b) fluid flow openings formed through and spaced across each of said parts to define flow through spaces for the fluid,

(c) each of said openings including width and length dimensions of predetermined value such that each of said fluid flow openings acts as an expansion chamber for the fluid flowing therethrough,

(d) each of the fluid flow openings of each of the mating parts being of uniform dimensions throughout the thickness of the part,

(e) the centerpoint of each of the fluid flow openings lying at the vertex of an imaginary equilateral triangle with the centerpoints of two adjacent fluid flow openings being arranged at the other vertices of said equilateral triangle, whereby each opening overlaps three openings of a contiguous part to provide a continuous dividing of the fluid flow as it flows from each opening to the three openings of the contiguous part which are in an overlapping relation thereto.

2. The fluid energy dissipation means of claim 1, further characterized by

(a) said mating parts comprising a series of stacked rigid plates, and

(b) a plurality of circular holes formed through each of said plates.