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Failsafe module

A technology of fault protection and output components, which is applied in the direction of valve operation/release devices, mechanical equipment, clutches, etc., and can solve problems such as system complexity

Pending Publication Date: 2022-01-07
ROTORK CONTROLS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Systems to overcome these limitations have been complex in the past and involved separate motors and actuators to rewind or manage the spring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0121] figure 1 A fault protection module 100 having the outer casing 101 is shown, the outer casing, which has an input member 110 that can be rotated relative to the outer casing 101 and an output member 112 that can be rotated relative to the outer casing 101. The input member 110 and the output member 112 are disposed at opposite ends of the outer casing 101. Both the input member 110 and the output member 112 are generally in the form of the cylindrical shaft, and with respect to the common axis coaxial and can be rotated around the common axis. The outer casing 101 also houses a coupling mechanism that can selectively couple the input member 110 to the output member 112. The coupling mechanism includes: an intermediate member 116; three energy storage devices 114a, 114b, 114c, and driving devices 122, 124; and latch mechanisms 118, 120.

[0122] The intermediate member 116 is arranged to be coaxial with the input member 110 and is coupled to the input member 110 and is rota...

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PUM

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Abstract

A failsafe module comprising an input member (310), an output member (312), and a coupling mechanism for coupling the input member to the output member. The coupling mechanism comprises an intermediate member (316a) movable relative to the output member to energise an energy storage device and a latch mechanism (318, 320) to hold the energy storage device in an energised state. When the latch mechanism is engaged, the input and output members are coupled together and the energy storage device is held in an energised state and isolated from the coupling between the input and output members. When the latch mechanism is released, the energy storage device can release its energy to drive the output member to a predetermined position.

Description

Technical field [0001] The present invention relates to a failSafe module, which can be used, for example, to actuate the valve to a safe operating position, for example, in an emergency. Background technique [0002] In the valve actuation, there is a case where the valve is required in an emergency. These emergencies may be caused by the off-site power-off, or the site is powered off. Emergency may cause an emergency shutdown command (ESD). In this case, the valve moves to a safe position (turned on or off as needed) is critical. [0003] Many existing systems depends on both a spring that is permanently coupled to the output of the actuator and the input of the valve. When power is powered off, the spring is reversed to drive the actuator to close the valve. This has the effect of applying a restressing through the actuator. Another consideration is that the actuator must be strong enough to operate both the spring and valve during each valve operation. The spring will also pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/528F16K31/56
CPCF16K31/56F16K31/5282F16K31/055F16K31/535F16P3/008F16D41/105F16K31/566
Inventor 斯图亚特·雷詹姆斯·霍普伍德
Owner ROTORK CONTROLS LTD