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Method and device for transferring a paper web from a supporting woven fabric to another

A technology for paper webs and fabrics, applied in papermaking, papermaking machines, wet end of paper machines, etc., can solve the problems of expensive purchase, operation and maintenance of suction rolls, complex width of suction area and high cost, and achieve the cost of purchase and operation. Low, reliable conveying web, the effect of solving the problem of wear and tear

Active Publication Date: 2012-12-26
VALMET CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, other types of problems arise when using suction rolls: firstly, adjusting the width of the suction area in the suction roll is complex and costly; secondly, the suction rolls are expensive to acquire, operate and maintain
This loss is further enhanced if the felt travels over the suction box cover at higher speeds

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method and device for transferring a paper web from a supporting woven fabric to another
  • Method and device for transferring a paper web from a supporting woven fabric to another
  • Method and device for transferring a paper web from a supporting woven fabric to another

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] figure 1Shows a partial view of a paper machine referred to in US patent document 5,888,354 according to the prior art - a press section included in an apparatus for conveying a paper web from one support fabric to another . The pressure section shown in the drawings is composed of a first pressure section 10 and a second pressure section 20 . The first press section is constituted in the figure by the shoe roll 12 and its counter roll 14, the paper web lying between the two felts 32 and 34 passes through the press of the first press section from left to right in the figure. Area. The first felt 32 runs in the form of a loop, in which the shoe roller 12 is located, so that the path of the first felt 32 extends upwards around the shoe roller when the felt guide roller 16 is adjustable. The second felt then travels on counter rolls 14 . On the way between the counter roll 14 and the felt guide roll 16 the paper web W is separated from the first felt 32 by means of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The object of the present invention is a method and a device for transferring a paper web from a supporting woven fabric to another. The method according to the invention and the device according to the present invention are therefore suitable, for example, for transferring a web from the wire section onto a press felt and from the press into the dryer section. The use of the method and of the device is particularly advantageous when transferring the paper web in the press section of the paper machine from the first to the second press. The key aspect of the method according to the invention and of the device according to the invention is that when detaching the paper web W from the supporting woven fabric (46) a transfer suction box (56) is used in conjunction with the felt guide roller (54), wherein the cover of said box substantially has the same direction as the paper web (W) running from the felt guide roller (54) to the subsequent roller (64) such that said cover does not change the running direction of the web W and suctions an air layer strip (200) on both sides of the web W through the woven fabric (46).

Description

technical field [0001] The invention relates to a method and an apparatus for transferring a paper web from one support fabric to another. The method according to the invention and the device according to the invention are thus suitable, for example, for conveying a web from a wire section to a press felt and from the press felt into a dryer section. The method and the device are used in particular when transferring a paper or board web from a first press to a second press of a press in a paper machine, board machine or other corresponding machine favorable. Furthermore, the method according to the invention and the device according to the invention can also be used at all or almost all points in a paper machine where the web is transported from one fabric to another. Background technique [0002] The paper web conveying method and paper web conveying equipment in the prior art will be described in detail below by taking the press section of a paper machine as an example. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F2/00D21F1/48D21F3/04
CPCD21F3/045D21F2/00D21F1/48
Inventor 于尔基·萨韦拉
Owner VALMET CHINA CO LTD
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