CN2328688Y

CN2328688Y - Seam screen for pulp separation

Info

Publication number: CN2328688Y
Application number: CN 98211743
Authority: CN
Inventors: 项三富; 王美娟
Original assignee: LINHAI CITY MECHANICAL SIEVE FACTORY ZHEJIANG PROV
Current assignee: LINHAI CITY MECHANICAL SIEVE FACTORY ZHEJIANG PROV
Priority date: 1998-04-24
Filing date: 1998-04-24
Publication date: 1999-07-14
Anticipated expiration: 2008-04-24

Abstract

The utility model belongs to the technical field of paper making, particularly a device for separating impurities in paper pulp. The existing similar devices have circular screen holes and low long-fiber throughput rate, and the impurities are easy to flow out. The utility model arranges gaps among screen bars to a round-fence cylinder of which the upper end and the lower end are respectively welded with an upper flange and a lower flange to make the gap between every two screen bars form into a screen seam, and the outer surface of the cylinder is welded with ribs. Thereby, the throughput rate of long-fibers is improved, the impurity flow out is reduced, and the utility model has obvious functions of production cost reduction and product grade enhancement.

Description

Seam screen for pulp separation

The utility model belongs to the screen technology field, particularly is used for the impurity separating device of paper industry to paper pulp.

For the paper mill, produce good toughness, highly polished high-grade paper, fiber will be grown in the paper pulp, and impurity will lack.And be used for the screen cylinder that the fiber with paper pulp leaches now, be that the close circular hole of opening constitutes screen cloth on its tubular metal wooden partition.This screen cylinder exists two shortcomings, and the one, because the rotary strainer bore dia is generally about 2mm, the long fiber percent of pass is low, hanging easily causes the waste of production cost raising and raw material; The 2nd, the impurity suitable with sieve diameter to size passes through sieve aperture easily, so that shuts out a lot of solids, impurity and dust at paper core slurry, makes the class of finished paper be difficult for improving, and all can influence economic benefit of enterprises.

The purpose of this utility model is to provide a kind of long fiber easily by the high Seam screen for pulp separation of impurity rejection rate for paper industry.

The utility model comprises upper and lower flange, grating, rib, it is characterized in that many above-mentioned grating parallel clearances are arranged in round grid tubular, gap between per two gratings constitutes the sieve seam, rib intersects at the outer surface of sieve seam welding at circle grid tube, up and down two ends respectively with above-mentioned upper and lower flange welding.

Above-mentioned grating can be horizontal clearance type row, also can be that the axial clearance is stacked.

The cross section of grating can be an equilateral triangle, and drift angle is arranged outwardly, also can be prismatic, circle or rectangle.

Slotted screen provided by the utility model, change traditional rotary strainer hole into the vertical masonry joint hole, press different size, gap width is between 0.2～0.6mm, elongated fibers was passed through easily, flow is accelerated, and hanging greatly reduces, and has improved raw material (particularly timber) utilization rate, reduced production cost, intercepted the impurity outflow of size again, guaranteed the quality of product paper, had tangible economic benefit and certain ecological benefits greater than the slit.

In the accompanying drawing, Fig. 1 is the hard row's of the utility model grating a structural representation, and Fig. 2 is the stacked structural representation of ring-type grating, and Fig. 3 is the vertical view of Fig. 2, and Fig. 4 is an A-A partial view among Fig. 1, and Fig. 5 is the schematic diagram of Fig. 4 when adopting the double-wedge section grating.Fig. 6 is the sectional view of thin rib.

The utility model is described in further detail below in conjunction with accompanying drawing and process.

Figure 1 shows that example, straight grizzly bar 4 adopts triangle section, and sieve seam 6 width are 0.45mm.During making, at first triangle straight grizzly bar 4 is arranged in parallel by design gaps, the thin rib 3 and the relative cross arrangement of straight grizzly bar 4 sharp angles that will have protruding cutting edge of a knife or a sword, with electric resistance welding thin rib 3 is pressed into straight grizzly bar 4 and welds into the planar rectangular screen cloth again, be rolled into the round grid tube and the company of weldering by the rib direction then, its upper and lower side connects with upper flange 1, lower flange 5 welderings respectively, promptly constitutes longitudinal joint formula slotted screen.If be rolled into the round grid tube and the company of weldering, then constitute stacked transverse joint formula slotted screen as shown in Figure 2 by the grating direction.Because in service in the paper mill, the pressure in the grid tube is greater than outside the tube, and is indeformable in order to guarantee grating 4, except above-mentioned thin rib 3 was strengthened, spacer sleeve welded reinforcement 2 anchor ears that the round bar ring constitutes again, further strengthens the bending strength of grating 4.Another example of grating 4 shown in Figure 4 is that the cross section is a prismatic, except being difficult for hanging, also has water conservancy diversion preferably, and weak point is to process slightly complexity.

Claims

1, a kind of Seam screen for pulp separation, comprise upper flange (1), lower flange (5), grating (4), rib (3), it is characterized in that many gratings (4) parallel clearance is arranged in round grid tubular, gap between per two gratings (4) constitutes sieve seam (6), rib (3) intersects at the outer surface that sieve seam (6) is welded on round grid tube, and cylindrical shell two ends up and down connects with upper flange (1), lower flange (5) weldering respectively.

2, Seam screen for pulp separation as claimed in claim 1 is characterized in that grating (4) can be the horizontal clearance vertical setting of types, also can be that the axial clearance is stacked.

3, Seam screen for pulp separation as claimed in claim 1 is characterized in that the cross section of grating (4) can be an equilateral triangle, and drift angle is arranged outwardly, also can be prismatic, circle or rectangle.

4. as the described Seam screen for pulp separation of claim 1～4, it is characterized in that barrel outer surface is welded with reinforcement (2) at interval.