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Headbox for a machine for producing a fibrous web

A fiber material and headbox technology, applied in the paper machine, papermaking, paper machine wet end, etc., can solve the problems of time-consuming and labor-intensive reassembly of the headbox, unusable headbox, etc., and achieve less downtime and good volume Flow constant, technically reliable results

Inactive Publication Date: 2012-05-23
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the absence of these parts, the headbox was unusable during this time
In addition, the reassembly of the disassembled headbox is time-consuming and laborious, and in certain cases also entails technical risks

Method used

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  • Headbox for a machine for producing a fibrous web
  • Headbox for a machine for producing a fibrous web
  • Headbox for a machine for producing a fibrous web

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] figure 1 A vertical and schematic longitudinal section through an exemplary embodiment of a headbox 1 for a machine for producing a fibrous material web 3 from a fibrous material suspension 2 is shown. It goes without saying that the illustrated headbox 1 can also be configured as a multilayer headbox for producing the fibrous material web 3 using at least two different fibrous material suspensions. The fibrous material web 3 may here in particular be a paper, cardboard or tissue paper web.

[0035] The headbox 1 has a conveying device 4 for conveying the fibrous material suspension 2 , for example embodied as a transverse distribution pipe 5 shown or a circular distributor with a plurality of hoses, not shown.

[0036] For example, the distribution tube orifice plate 6 of three rows is directly connected to the conveying device 4 along the flow direction R (arrow) of the fiber material suspension 2, and the distribution tube orifice plate 6 of the three rows has a lar...

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PUM

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Abstract

The invention relates to a headbox for a machine for producing a fibrous web from a fibrous suspension, having a feed device (4, 5) which feeds the fibrous suspension, having a distributor pipe perforated plate (6) which directly adjoins the feed device in the flow direction of the fibrous suspension, having an intermediate duct (8) which directly adjoins the distributor pipe perforated plate in the flow direction and which has two walls (9.1, 9.2), having a turbulence generating means (10) which directly adjoins the intermediate duct in the flow direction, and having a headbox nozzle (13) which directly adjoins the turbulence generating means in the flow direction, wherein the feed device, the distributor pipe perforated plate and the intermediate duct are arranged in a first plane of alignment (AE.1); and the turbulence generating means and the headbox nozzle are arranged in a second plane of alignment (AE.2), and wherein the two planes of alignment enclose an angle (a) in the range > 90 DEG and < 180 DEG . The headbox according to the invention is characterized in that, on at least one wall (9.2) of the intermediate duct (8), there are arranged a plurality of means (17,17.1), which are arranged spaced apart from one another both in the width direction and also in the longitudinal direction of the headbox, for metering a fluid (18) in partial fluid flows (18.T) into the single fibrous suspension, in that the individual means (17,17.1) comprises a metering duct (19) which has a metering duct opening (19.1) and a metering duct central line (19.M), and in that the respective metering duct opening of the metering duct is aligned such that the metering duct central line of said metering duct impinges on the turbulence generating means so as to form an impingement point (AP).

Description

technical field [0001] The invention relates to a headbox for a machine for producing a fibrous material web from at least one fibrous material suspension, wherein the fibrous material web is in particular a paper, cardboard or tissue web, the headbox has: A conveying device for a fibrous material suspension; a distribution tube orifice plate directly connected to the conveying device in the flow direction of at least one fibrous material suspension and having a large number of flow channels arranged in rows and columns; along at least one fiber The flow direction of the material suspension is directly connected to the central channel on the distribution tube perforated plate, which extends in the width direction of the headbox and has two walls preferably having the machine width; in the flow direction of at least one fiber material suspension A turbulence generating device with a plurality of flow channels arranged in rows and columns, directly connected to the intermediate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F1/02
CPCD21F1/024D21F1/022D21F1/02
Inventor 沃尔夫冈·鲁夫弗兰克·法伊马库斯·豪斯勒奥勒·汉森
Owner VOITH PATENT GMBH
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