SU1249076A1 - Apparatus for aerodynamic forming of fibrous material - Google Patents

Description

The invention relates to equipment for the production of paper and nonwovens and can be used in the pulp and paper and textile industries.

The purpose of the invention is to improve the performance properties while improving the quality of the material,

The drawing is a diagram of the proposed device.

A device for aerodynamic shaping of fibrous material includes a forming chamber 1 formed by fixed walls 2 and: a mesh conveyor 3, a dispersant 4 adjacent to the shaping chamber 1. Disperser 4 is placed in a casing 5. Under the mesh conveyor 3 there is a suction unit 6 connected to the fan 7. The suction box 6 and the fan 7 form a suction system, the exhaust of which is connected to the forming chamber 1 by means of a connecting duct consisting of two parts - the exhaust 8 and the receiving 9. st connecting channel comprises means 10 for vfavnivani floor flow rate (Ref ml guides reschet- honeykomb and ki), and the entrance to the receiving portion of the connecting hole 9 vshol nen a confuser portion 1 having a profile izgibayuscheys smoothly curved line.

The device works in the following way.

The fiber from the dispersant 4 is fed to the forming chamber 1, where it is mixed with the gas flow coming from the receiving part of the junction 9. The static pressure in the forming chamber 1 is kept below atmospheric, so that in the gap between the disperser, pergator 4 and its casing 5 carries air from the atmosphere into the forming chamber 1. At the end of the last, the fibers are deposited on the mesh conveyor 3, under which vacuum is generated in the suction box 6 by means of the fan 7. A discharge is created at the extraction system vayuschy vozhuda current through the connecting channel 8 and 9 formuyupzuyu chamber 1, air in the exhaust portion of the duct 8 is passed through means 10 for equalizing the speed of the floor where there is crushing and also ha

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the setting of large-scale ripple speeds.

The connective channel performs several functions; closes the air path, maintains a static dosing in the forming chamber 1 below atmospheric, so that a normal pf.retk is installed in the gap between the disperser 4 and its casing 5 and additionally levels the velocity field, since only the central, with the most uniform field, part of the stream.

In the proposed device, maintaining a normal flow in the gap between the disperser 4 and its crowns 5 with the simultaneous leveling effect of the connecting channel is achieved at all values of the gap between the disperser and the casing, and with the same ratio of width and height of the entrance to the receiving part of the connecting channel 9 to the width and height of the exit of the exhaust part 8, respectively. This is due to the fact that the confused section 11 with smooth contours has a leveling effect on the flow, so that the air leaked into the path through the gap between the disperser 4 and the flush 5 is discharged after the exhaust part of the connecting piece 8 in the wide range of the gap mentioned without compromising flow quality.

Therefore, the proposed device does not require, for example, selection and installation of a replaceable section in the exhaust or receiving part of the connecting channel, when switching to output from another type of fiber and changing the gap between the dispersant and the casing, thereby not requiring additional labor for installation and reduced machine downtime . In addition, due to the confusion of the entrance to the receiving part 9, the device is insensitive to distortions and deviations from the alignment of the parts of the connecting channel, which simplifies and speeds up the installation of the device.

The means 10 for leveling the flow rate field should be located in the exhaust part 8 of the connecting channel, since the gas flow rate in the exhaust part is lower than in the receiving part. In addition, when

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The proposed arrangement means to improve the operational energy consumption of 10 to overcome the machine’s end, namely to reduce the drag resistance of the lower cost of installation work during

another -; reconfiguring equipment when switching to the output of another type of product. All this allows to obtain, thus allowing to reduce the length of the improved quality and the allowance of machine downtime.

Claims (1)

DEVICE FOR AERODYNAMIC FORMING OF FIBROUS MATERIAL, containing a dispersant located in the casing, an adjacent forming chamber with fixed walls and a mesh conveyor, a suction system, connected to the forming chamber and having a connecting channel consisting of a mounted coaxial part with a confuser section, and means for leveling the airflow velocity field, characterized in that, in order to improve operational properties while improving uu quality material, means for aligning the field of air flow velocities found in the exhaust portion of the connecting channel and the convergent portion of the receiving part of the connecting hole is located at the inlet of the receiving portion and has a smoothly curving profile curve.