Control cylinder for a control valve and control valve comprising such a control cylinder

• US 20170234440A1
• Filed: 02/09/2017
• Published: 08/17/2017
• Est. Priority Date: 02/17/2016
• Status: Abandoned Application

• Current Assignee: VAG-Armaturen GmbH (Rexnord Corporation)
• Original Assignee: VAG-Armaturen GmbH (Rexnord Corporation)
• Inventors: DETMERS, Andreas, MARKHEISER, David, SCHULZ, Carl
• Application Number:
  US15/428,352
• Publication Number:
  US 20170234440A1
• Time in Patent Office: Days
• CPC Class Codes: F16K 3/246 Combination of a sliding valve and a lift valve
• CPC Class Codes: F16K 3/267 Combination of a sliding valve and a lift valve F16K3/262, F16K3/265 take precedence
• CPC Class Codes: F16K 3/32 Means for additional adjustment of the rate of flow
• 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 47/04 for decreasing pressure or noise level, the throttle being incorporated in the closure member
• 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

Abstract

A control cylinder for a control valve, the control cylinder including a main body having through-openings. To optimize the flow and to reduce cavitation, the through-openings have an inside wall with a curved, oblique or conical profile and/or with edges and/or undercuts.

Claims

1. A control cylinder for a control valve comprising a main body with through-openings, wherein the through-openings have an inside wall with a curved, oblique or conical profile and/or with edges and/or undercuts.

2. The control cylinder as in claim 1, wherein the through-openings extend through the main body in the form of spirals, steps, curves or zigzags.

3. The control cylinder as in claim 1, wherein the inside wall of the through-openings is curved toward or away from a center line of the through-openings.

4. The control cylinder as in claim 1, wherein the through-openings are configured in the form of a venturi nozzle with a cross section which, when looking in the direction of flow, initially narrows and subsequently widens again.

5. The control cylinder as in claim 1, wherein the through-openings comprise a plurality of consecutive conical sections or a plurality of cylindrical sections laterally offset relative to each other.

6. The control cylinder as in claim 1, wherein at least one molded part is deposed in the through-openings.

7. The control cylinder as in claim 1, wherein the through-openings have inlet openings on an outside face, the shape of which differs from that of outlet openings on an inside face of the main body.

8. The control cylinder as in claim 7, wherein the inlet openings are configured in the form of a slotted hole, and in that the outlet openings are configured in the form of a circular hole.

9. The control cylinder as in claim 7, wherein the inlet openings are configured in the form of a circular hole, and in that the outlet openings are configured in the form of a slotted hole.

10. The control cylinder as in claim 1, wherein the control cylinder is produced by means of a 3D printing process from layers of metal powder that are selectively melted layer by layer by a laser beam.

11. A control valve comprising a housing, a valve body adjustably disposed inside the housing and a first control cylinder disposed in the housing, wherein the first control cylinder is the control cylinder of claim 1.

12. The control valve as in claim 11, further comprising a second control cylinder, the first and second control cylinders oriented coaxially with respect to each other, wherein the second control cylinder is the control cylinder of claim 1.