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Title: Fast valve

Abstract

A fast valve is disclosed that can close on the order of 7 milliseconds. It is closed by the force of a compressed air spring with the moving parts of the valve designed to be of very light weight and the valve gate being of wedge shaped with O-ring sealed faces to provide sealing contact without metal to metal contact. The combination of the O-ring seal and an air cushion create a soft final movement of the valve closure to prevent the fast air acting valve from having a harsh closing.

Inventors:
 [1]
  1. (Grafton, VA)
Publication Date:
Research Org.:
Virginia Tech Intellectual Properties, Inc. (Blacksburg, VA)
OSTI Identifier:
868225
Patent Number(s):
US 5102093
Assignee:
Southeastern Universities Research Association (Newport News, VA) TJNAF
DOE Contract Number:
FG22-83PC60806
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fast; valve; disclosed; close; milliseconds; closed; force; compressed; air; spring; moving; designed; light; weight; gate; wedge; shaped; o-ring; sealed; provide; sealing; contact; metal; combination; seal; cushion; create; soft; final; movement; closure; prevent; acting; harsh; closing; sealing contact; acting valve; metal contact; light weight; compressed air; o-ring seal; air cushion; wedge shaped; valve gate; fast valve; /251/

Citation Formats

Van Dyke, William J. Fast valve. United States: N. p., 1992. Web.
Van Dyke, William J. Fast valve. United States.
Van Dyke, William J. 1992. "Fast valve". United States. doi:. https://www.osti.gov/servlets/purl/868225.
@article{osti_868225,
title = {Fast valve},
author = {Van Dyke, William J.},
abstractNote = {A fast valve is disclosed that can close on the order of 7 milliseconds. It is closed by the force of a compressed air spring with the moving parts of the valve designed to be of very light weight and the valve gate being of wedge shaped with O-ring sealed faces to provide sealing contact without metal to metal contact. The combination of the O-ring seal and an air cushion create a soft final movement of the valve closure to prevent the fast air acting valve from having a harsh closing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1992,
month = 1
}

Patent:

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  • A very fast acting valve capable of producing a very well-defined plug of gas suitable for filling a theta pinch vacuum vessel is given. The valve requires no springs, instead being stopped mainly by a nonlinear force. Thus, the valve is not subject to bouncing; and the ratio of the size of the valve housing to the size of the valve stem is smaller than it would be if springs were needed to stop the valve stem. Furthermore, the valve can be used for thousands of valve firings with no apparent valve damage.
  • A valve is provided for protecting the high vacuum of a particle accelerator in the event of air leakage, wherein the valve provides an axially symmetrical passage to avoid disturbance of the partical beam during normal operation, and yet enables very rapid and tight closure of the beam-carrying pipe in the event of air leakage. The valve includes a ball member which can rotate between a first position wherein a bore in the member is aligned with the beam pipe, and a second position out of line with the pipe. A seal member is flexibly sealed to the pipe, andmore » has a seal end which can move tightly against the ball member after the bore has rotated out of line with the pipe, to thereby assure that the seal member does not retard rapid rotation of the ball valve member. The ball valve member can be rapidly rotated by a conductive arm fixed to it and which is rotated by the discharge of a capacitor bank through coils located adjacent to the arm.« less
  • A fast-acting valve actuator utilizes a spring driven pneumatically loaded piston to drive a valve gate. Rapid exhaust of pressurized gas from the pneumatically loaded side of the piston facilitates an extremely rapid piston stroke. A flexible selector diaphragm opens and closes an exhaust port in response to pressure differentials created by energizing and de-energizing a solenoid which controls the pneumatic input to the actuator as well as selectively providing a venting action to one side of the selector diaphragm.
  • A fast-acting valve actuator utilizes a spring driven pneumatically loaded piston to drive a valve gate. Rapid exhaust of pressurized gas from the pneumatically loaded side of the piston facilitates an extremely rapid piston stroke. A flexible selector diaphragm opens and closes an exhaust port in response to pressure differentials created by energizing and de-energizing a solenoid which controls the pneumatic input to the actuator as well as selectively providing a venting action to one side of the selector diaphragm.