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Collet biasing device for valve actuator

A technology for biasing devices and actuators, applied in valve devices, valve operation/release devices, valve details, etc., which can solve problems affecting the performance of the actuator 100, leakage, and affecting sealing, etc.

Active Publication Date: 2011-11-09
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tension applied to the valve shaft 138 may cause deflection of a valve control element (not shown), which may include, for example, a butterfly valve control element, thereby affecting the quality, life expectancy, or leakage of any resulting seals.
Also, over-drawing the collet 124 can displace the operating rod 122 toward the valve shaft 138 and engage the housing 102, causing metal-to-metal contact, which creates friction and affects the performance of the actuator 100.

Method used

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  • Collet biasing device for valve actuator
  • Collet biasing device for valve actuator
  • Collet biasing device for valve actuator

Examples

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Embodiment Construction

[0018] figure 2 Illustrated is a rotary valve actuator 200 constructed in accordance with the principles of the present disclosure. The rotary valve actuator 200 generally includes a housing 202 and a drive assembly 204. The drive assembly 204 of the illustrated embodiment includes a diaphragm subassembly 206 and an operating rod subassembly 208. The diaphragm subassembly 206 generally includes a diaphragm 210 that is operatively connected to the diaphragm rod 212 to actuate the operating rod subassembly 208. The operating rod subassembly 208 includes an operating rod 214, a collet 256 and a collet biasing device 215. In the disclosed example, the collet biasing device 215 includes a coil spring 216 operatively engaged with the collet 256. The diaphragm rod 212 is operatively connected to the operating rod 214 and is adapted to drive the rotary valve shaft 219 of a rotary valve (not shown). During the assembly process, the collet biasing device 215 biases the collet 256, and...

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PUM

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Abstract

The present invention discloses a valve actuator comprises a housing, a lever, a collet and a biasing device. The lever is disposed within the housing and is adapted to be operatively coupled to rotate the valve shaft. The collet is carried by the lever and adapted to couple the lever to the valve shaft. The biasing device comprising a spring operatively coupled to the collet to bias the lever into a predetermined position.

Description

Technical field [0001] The present disclosure relates to a valve actuator, and in particular, to a collet biasing device for the valve actuator. Background technique [0002] FIG. 1 illustrates a typical rotary valve actuator 100. The rotary valve actuator 100 generally includes a housing 102 and a drive assembly 104. A portion of the housing 102 is removed, thereby exposing the drive assembly 104, which is partially cut away for the purpose of description. [0003] The housing 102 includes a generally cylindrical body portion 106 and a pair of opposed cover plates 108a, 108b. The driving assembly 104 includes a diaphragm subassembly 110 and an operating rod subassembly 112 shown in cross section. The diaphragm subassembly 110 generally includes an upper housing 114 including a diaphragm 116, a diaphragm rod 118 and a pair of springs 119. The spring 119 biases the diaphragm 116 to the position shown. The diaphragm 116 is operatively connected to the diaphragm rod 118 so that t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/165
CPCF16K31/1655
Inventor 保罗·拉塞尔·达拉格保罗·安德鲁·戴
Owner FISHER CONTROLS INT LLC