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State monitoring method for closed valve systems for the assessment of the maintenance state thereof

A state, friction coefficient technology, applied in the field of monitoring dilution water valve, can solve the problems of expensive, valve entanglement, difficult to move, etc.

Active Publication Date: 2015-04-15
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The problem is that over time the valve can become entangled, clogged and / or difficult to move
Due to the large number of position-controlled drives, the transverse contouring device consists of up to 200 position-controlled drive units, which is a very expensive measure

Method used

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  • State monitoring method for closed valve systems for the assessment of the maintenance state thereof
  • State monitoring method for closed valve systems for the assessment of the maintenance state thereof
  • State monitoring method for closed valve systems for the assessment of the maintenance state thereof

Examples

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Embodiment Construction

[0025] exist figure 1 A schematic diagram of the lateral adjustment device 1 is shown in . The transverse adjustment device 1 consists of a transverse profiler 2 , a transverse regulator and a measuring device 3 for measuring the paper basis weight cross-sectional distribution and the moisture cross-sectional distribution. In this case, the transverse profiling device 2 consists of up to 200 valve units by means of which the paper weight in the transverse direction is regulated by the supply of dilution water 8 . Each valve unit consists of a valve 6 controlled by a position-controlled drive 7 .

[0026] exist figure 2 A position-controlled drive 7 connected to the valve 6 is shown in , by means of which the method according to the invention can be carried out. A push rod 10 protruding from the position control drive housing 9 and supported in an axially displaceable manner on said position control drive housing 9 is arranged in the position control drive housing 9 for mak...

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PUM

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Abstract

The invention relates to a method for the operation control of motor-driven valves (6) for controlling liquid flows, especially for monitoring dilution water valves, such as they are used in fiber material web production machines, the drive (7) of the valve comprising a stepper drive (17) and the erroneous counting of the steps caused by a malfunction of the valve being used to determine a friction coefficient for the valve.

Description

technical field [0001] The invention relates to a method for functional monitoring of actuated valves, in particular dilution water valves such as those used on fiber web manufacturing machines. Background technique [0002] It is known to have a fiber web manufacturing machine with a headbox to which a material suspension is supplied via a plurality of conduits from a distributor, wherein the individual volume flows are regulated by several adjustable valves. [0003] It is also known to implement a further zoned supply of material in the headbox for adjusting the basis weight (weight per unit area) of the paper. Such a mixing device is known, for example, from patent application DE4019593. A mixing device is described here which mixes a plurality of volume partial flows to produce a constant mixed volume flow. To this end, the individual volume fractions are conducted into the mixing device and are regulated in dependence on each other by using complex valve control devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/08F16K31/04F16K37/00
CPCF16K37/0083D21F1/08F16K31/04G05B23/0283
Inventor P.比纳
Owner VOITH PATENT GMBH