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Web guiding device and guiding belt separation device used for fibrous web machine and

A fiber web machine and separation device technology, which is applied in the direction of paper machine, paper machine wet end, press part, etc., can solve the problem of poor contact accuracy of the guide device, reduced success rate of web guide, and aggravated guide belt Floating and other issues

Active Publication Date: 2012-12-12
VALMET TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the guide tape always easily comes off the surface of the guide plate and thus exacerbates the flutter problem, which can cause the guide tape to tear or slide off the guide plate
This problem also limits the geometry of the guidance achieved by blowing plates, in connection with the separation device, the ends of the severed guide strips move forward in an indeterminate manner, thereby making the guidance to the rear Deterioration of the touch accuracy and thus reduced success rate of web guidance

Method used

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  • Web guiding device and guiding belt separation device used for fibrous web machine and
  • Web guiding device and guiding belt separation device used for fibrous web machine and
  • Web guiding device and guiding belt separation device used for fibrous web machine and

Examples

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Embodiment Construction

[0013] Figure 1a A part of a known web guiding arrangement for a fiber web machine is shown. The known blowing air flow for web guidance is directed from a flange, i.e. a step, to the guide surface, where the flange consists of a surface which deviates from the guide surface, which can brush against the guide belt and thus cause friction. Fiber web machines are eg paper and board machines. The guide device here comprises guide surfaces 10 , each of which is directed at a blowing air stream 11 for conveying the guide strips 12 . With the aid of this blowing air flow for guidance, the guide strip is to be attached to the guide surface and transported further. However, problems arise in this web guiding device according to the prior art. Such as Figure 1a As shown, the guide strip 12 can only follow the guide surface 10 inaccurately and flutters in an indeterminate manner. At least when the guide surfaces are angled relative to each other, the guide strip can loosen from th...

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Abstract

The invention relates to a web guiding device for a fiber web machine. The web guiding device is provided with a guiding surface (10), and each guiding blowing device (11) used for conveying a guiding belt (12) is aligned with the guide surface (10). The device is arranged to be, between two mutually succeeding guiding blowing devices (11), the deflection angle beta between guiding belt moving directions defined by a stop position (15) formed via a second blowing position (14) and the average moving direction of the guiding belt (12) on a first blowing position (13) of the guiding belt (12) is 10DEG -70 DEG, preferably 30 DEG -60 DEG. The invention also relates to a guiding belt separation device for a fibrous web machine.

Description

technical field [0001] The invention relates to a web guiding device (Bahnaufführanordnung) for a fiber web machine, which has a guiding surface, to which each blowing air stream (Blasstrom) for a conveying guiding belt (Aufführstreifen) is directed noodle. The invention also relates to a guide belt separating device for a fiber web machine. Background technique [0002] In fiber web machines, various devices based on guided blowing (hereinafter also referred to simply as blowing) are used for conveying and guiding the guide belt. There are also so-called blowing plates whose function is also based on guided blowing. The blower plate has a guide plate as a guide surface and, due to the so-called Coanda effect (Coanda effect), produces a vacuum effect by blowing air directed at the guide plate. In other words, the aim is to have the guide strip adjoin the guide surface of the blowing plate, while at the same time allowing the blowing air flow in the direction of conveyance...

Claims

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Application Information

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IPC IPC(8): D21G9/00
CPCD21G9/0063D21F2/00
Inventor 尤哈·莱蒂奥米卡·曼基拉
Owner VALMET TECH OY
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