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Flow box

A headbox and pulp distributing technology, which is applied in the direction of textiles and papermaking, paper machine, paper machine wet end, etc., can solve the problems of large cross flow, low sheet evenness, unstable stock flow, etc., and achieve small cross flow, pulp The effect of stabilizing the flow and improving the uniformity

Active Publication Date: 2013-07-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a headbox to solve the problems of unstable stock flow, large cross flow and low sheet evenness in the prior art

Method used

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Embodiment Construction

[0027] The present invention will be further described in detail below with reference to specific embodiments and drawings, which is an explanation but not a limitation of the present invention.

[0028] See figure 1 , The headbox of the present invention includes a horizontally placed cylindrical shell 1. A cylindrical roller 2 with a diameter smaller than that of the cylindrical shell 1 is coaxially sleeved inside the cylindrical shell 1, and the outer surface of the roller 2 There is a gap 10 between the inner surface of the cylindrical shell 1 and the axis of the roller 2 coincides with the axis of the cylindrical shell 1. The roller 2 can rotate around its axis in the clockwise direction as shown by the arrow in the figure. The roller 2 There are several annular grooves 2b on the outer roller surface, and a slurry inlet 3 is provided at the bottom right of the cylindrical shell 1. The slurry inlet 3 is provided with an equalization chamber 4, the equalization chamber 4 and tw...

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Abstract

The invention discloses a flow box, and belongs to the field of paper-making mechanical equipment. The flow box comprises a cylindrical shell, wherein a pulp inlet and a pulp outlet are formed on the cylindrical shell; a pulp applying device is arranged at the pulp outlet; the pulp inlet is communicated with a pulp distributing device; a roller capable of rotating around the axis thereof is coaxially sleeved inside the cylindrical shell; a clearance is formed between the outer roll surface of the roller and the inner surface of the cylindrical shell. According to the invention, the roller is coaxially sleeved inside the cylindrical shell and the roller can rotate around the axis thereof, so that when the roller rotates at a high speed, under the driving of the pressure difference and the roll surface, pulp flows along with the roll surface in the clearance formed between the roll surface and the cylindrical shell; the flowing speed of the pulp is smaller than the motional speed of the roll surface, so that friction is generated, a turbulent flow is generated in a pulp flow, flocculated fiber clusters in the pulp flow can be dispersed, and thus the evenness of a paper sheet is improved; and the flow box is simple in structure and convenient to manufacture and is applicable to paper-making machines with high, medium and low speeds.

Description

Technical field [0001] The invention belongs to the field of papermaking machinery and equipment, and particularly relates to a headbox. Background technique [0002] The headbox is a key device of the paper machine, which plays a key role in producing good quality paper. One of the basic tasks of the headbox is to ensure that the fiber suspension is evenly distributed along the transverse direction of the paper machine to minimize the lateral weight difference of the paper; another basic task of the headbox is to ensure that the fibers in the fiber suspension are evenly dispersed In the water body, try to reduce the flocculation in the fiber suspension to maximize the evenness of the paper. [0003] The headbox is generally divided into three parts according to the working principle: size distributor, box body and leveling element, sizing device. [0004] The function of the pulp spreader is to evenly distribute the pulp along the transverse direction of the paper machine. The mos...

Claims

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Application Information

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IPC IPC(8): D21F1/02D21F1/04
Inventor 侯顺利
Owner SHAANXI UNIV OF SCI & TECH
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