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Combination device for lockout and partial stroke test of valve actuators

一种组合装置、部分开度的技术，应用在流体压力致动装置、阀的操作/释放装置、流体压力致动系统测试等方向，能够解决不锁定致动器、单一功能等问题

Active Publication Date: 2018-06-08
BRAY INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These device types have a single function as valve portion opening test devices only and do not lock the actuator

Method used

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  • Combination device for lockout and partial stroke test of valve actuators
  • Combination device for lockout and partial stroke test of valve actuators
  • Combination device for lockout and partial stroke test of valve actuators

Examples

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Embodiment Construction

[0069] The following description includes exemplary apparatuses, methods, techniques and instruction sequences that embody techniques of the inventive subject matter. However, it is understood that the described embodiments may be practiced without these specific details.

[0070] An exemplary embodiment of a locking and valve portion opening testing combination 2 according to the present disclosure may be fitted on an exemplary embodiment of a scotch yoke type actuator 1 such as, for example, a fluid jack actuator, Such as Figure 1 to Figure 5shown. The disclosed improvements can be implemented in other types of actuators 1 (by way of example only and not limited to linear actuators). The exemplary actuator 1 is used to turn a flow control member of a quarter-turn valve (not shown). The actuator 1 shown here converts the linear motion of the piston 5 when fluid pressure is applied on either side of the piston 5 to the output drive member of the actuator 1 through the scot...

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PUM

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Abstract

A combination device (102) configured to effect lockout and partial stroke testing for an actuator having a piston rod (104) providing linear motion and connected to a guide block (108) in an actuator, wherein the combination device includes a device housing (102a) having a housing bore, wherein the device housing is adapted to mount on a receptacle on the actuator that aligns a device housing bore coaxially to the translatory motion axis of the piston rod; an extension rod (109) adapted to be attached to the guide block connected to the piston rod; at least two slides or a profiled bore indexsleeve (106) disposed in the device housing that when engaged provide means of restraining the movement of the extension rod in a manner that prevents said extension rod from moving and, in use, a driver element of the actuator from rotating relative to an actuator housing; a housing cover mounted over the device housing wherein the housing cover protects and retains the extension rod, and the slides or the index sleeve in the device housing and a spring biased safety pin mounted on the housing cover wherein the spring biased safety pin is configured to prevent unintended actuation of the actuator; and a tubular cover to protect the extension rod.

Description

technical field [0001] The invention relates to the field of locking devices for preventing the operation of valve actuators and to the field of valve portion opening testing devices which only allow a predetermined degree of movement of the valve actuator. Background technique [0002] Safety equipment in industrial process plants with piping and valve arrangements typically includes emergency shutdown valves (hereinafter also referred to as "ESD valves"), vent valves and bypass valves to prevent pressure build-up in upstream or downstream sections. These valves are normally held open or closed, but can be quickly actuated to isolate a pipe section to stop further flow or to bypass that flow for emergency safety reasons. Actuation on an ESD valve uses a fail-close actuator that is biased to close the valve, normally held in the open position by air pressure. These valves are automatically closed by spring action or by reserve pneumatic supply upon loss of line air pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/163F16K35/02F16K35/06F16K1/50F16K1/52F15B15/24F15B19/00
CPCF16K31/1635F16K35/022F16K35/025F16K35/06F15B15/066F15B15/24F15B19/00F16K1/50F16K1/523F15B15/261F15B15/26F15B19/002F15B2015/267
Inventor P·苏简尼S·帕拉梅司万D·迪瓦卡兰S·库玛
Owner BRAY INT INC
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