A method, lifting device and arrangement for replacing a fabric in a web forming machine and a corresponding web forming machine

A technology for forming machines and fabrics, used in textiles and papermaking, paper machines, wet end of paper machines, etc., can solve problems such as damage to fabrics

Inactive Publication Date: 2009-06-24
VALMET CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When constructed with a roller assembly, dust can adhere to the belt around the roller assembly, which will damage the fabric to be replaced

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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  • A method, lifting device and arrangement for replacing a fabric in a web forming machine and a corresponding web forming machine
  • A method, lifting device and arrangement for replacing a fabric in a web forming machine and a corresponding web forming machine
  • A method, lifting device and arrangement for replacing a fabric in a web forming machine and a corresponding web forming machine

Examples

Experimental program
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Embodiment Construction

[0020] figure 1 The press section 12 of a web forming machine, such as a paper or board machine, is depicted, the figure showing a longitudinal section of the web forming machine. A nip 14 is formed between a top roll 16 and a bottom roll 18 . figure 1 The cross-section of the machine is taken approximately in the middle of the machine and is a view from the back side, in this case the front side beam 21 consisting of a beam 20 and a horizontal beam 22 is partially hidden behind the rollers . Gravity is notably supported by vertical beams, which may be inclined. For beams supported in the direction of gravity, the term "vertical beam" is used, but this term is not intended to limit the shape or position of the beam. The fabric 24 in the press section 12 is supported in endless form by the rolls 16,18,19. These rollers 16 , 18 , 19 are in turn supported by beams 21 , or more precisely, by a frame consisting of vertical beams 20 and horizontal beams 22 . An openable interme...

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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PUM

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Abstract

The invention relates to a method for replacing a fabric in a web forming machine. In the method, the front side (42) of the web forming machine comprises beams (21) between which beams (21) a gap is created for replacing a fabric forming a closed loop (24). After creating the gap, the gap is maintained with a medium lifting device (10), in which medium lifting device (10) pressurizable chambers (30) defined by sealing elements (32) are arranged on both sides of the fabric (24). The sealing elements (32) are sealed against the fabric (24) when pressurizing the chambers (30). The invention also relates to a corresponding lifting device, arrangement, and web forming machine.

Description

technical field [0001] The invention relates to a method for changing fabrics in a web forming machine, in which method the front side of the web forming machine comprises a plurality of beams forming gaps between them for changing fabrics formed in a closed loop . The invention also relates to a corresponding lifting device, device and web forming machine. Background technique [0002] In various methods known in the art, the frame of the paper machine is fitted with movable spacers. These spacers are removed from where they were to replace the fabric formed into a closed loop. Typically, the back side of the frame section includes cantilever beams to support the frame section after the spacers are removed. A cantilever is a robust solution comprising a solid structure for applying the required pressure to the foundation of the paper machine shop. It is well known that the use of cantilever beams can be avoided due to the significant costs involved. In this case, cost ...

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 Applications(China)
IPC IPC(8): D21F1/24D21F7/00
CPCD21F7/001D21F1/24
Inventor 西莫·霍尔斯马-阿霍阿龙·曼尼奥
Owner VALMET CHINA CO LTD
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