CN2455755Y

CN2455755Y - High strength screen drum structure with slanting gaps

Info

Publication number: CN2455755Y
Application number: CN 00265593
Authority: CN
Inventors: 陈占勇; 林幼中
Original assignee: YINYI PAPERMAKING SCREENING EQUIPMENT CO Ltd WENZHOU CITY
Current assignee: YINYI PAPERMAKING SCREENING EQUIPMENT CO Ltd WENZHOU CITY
Priority date: 2000-12-26
Filing date: 2000-12-26
Publication date: 2001-10-24
Anticipated expiration: 2010-12-26

Abstract

The utility model relates to the structure of an inclined slotted screen drum in a pressurized screen used for refining paper pulp suspending liquid in a mechanical method at the front of a paper loading machine for paper pulp in papermaking process steps. The utility model is characterized in that one side of a cross section of a screen strip is designed into a dovetail shape, two side edges at the end of the other side and a dovetail-shaped bottom line vertically form an included angle alpha, and a staggered angle of two lines at the top is a beta angle. The radial inner sides of a plurality of supporting rings are uniformly distributed with a plurality of dovetail slots, and screen strips and the supporting rings are in inserting type adhesive connection. The utility model has the advantages of easy manufacture, high precision of slit width and good screening effect, the rigidity and the stability of the screen drum are enhanced, the flow speed of good slurry is enlarged, and slurry screening quantities are greatly enhanced.

Description

High strength R-joining screen cylinder structure

The utility model relates to the R-joining screen cylinder structure in the pressurized screen of using with mechanical means refined pulp suspension before the paper machine on the paper pulp in the papermaking operation.

Existing screen cylinder has two kinds of structures usually, and first kind of structure is to slot with milling cutter on sheet metal, makes it to form grating, sieve seam, rolls into the tubular welding again, formations such as electrochemical deburring.Advantage is the intensity height, and weak point is the manufacturing procedure complexity, and the sieve seam is big, the grating poor surface smoothness, and the slurry handling capacity is low.Second kind of structure is to process grating, support bar earlier, and grating is welded on some support bars, rolls into tubular through roll extrusion and is welded into screen cylinder.Advantage is that the sieve seam is little, and the grating surface smoothness is good, and deficiency is that welding sequence is also complicated, and efficient is low, and solder joint makes sieve seam width inequality through distortion in rolling, influences screen cylinder and normally uses.Above-mentioned two kinds of common weak points of structure are all to make planar shaped earlier to be rolled into cydariform again, cause deviation from cylindrical form big, are difficult to guarantee the screen cylinder precision, influence screening effect, and sieve seam direction is consistent with the sagittal plane direction, makes good slurry flow velocity slow, and efficient is low.

It is simple that the purpose of this utility model provides a kind of making, the high strength R-joining screen cylinder structure that screening effect is good.

In order to achieve the above object, high strength R-joining screen cylinder structure of the present utility model comprises cylinder, upper and lower flange, many gratings, also comprise several bracing rings, the radially inner side of this bracing ring is evenly equipped with the dovetail groove that equates with described grating quantity, one side of described grating cross section is designed to the swallow-tail form that is complementary with above-mentioned dovetail groove, and it is the β angle with the vertical line of swallow-tail form bottom line for the alternate angle of R-joining, top two lines that two sides of end side become sieve seam that the α angle makes formation respectively; Also gluing connection in the dovetail groove of described grating swallow-tail form one side insertion bracing ring.

Described α angle is 11.5～14.5 ° angle, and the β angle is 22 ° of angles.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the structural representation of present embodiment;

Fig. 2 is Figure 1A-A zoomed-in view;

Fig. 3 is the amplification cross-sectional view of grating.

As shown in Figure 1, 2, the high strength R-joining screen cylinder structure of present embodiment comprises cylinder 1, upper and lower flange 2, grating 3, bracing ring 4.The radially inner side of bracing ring 4 is evenly equipped with the dovetail groove that equates with grating 3 quantity, as shown in Figure 3, one side of grating 3 cross sections is designed to the swallow-tail form that is complementary with above-mentioned dovetail groove, two sides of end side constitute 13 ° of angles with the vertical line of swallow-tail form bottom line respectively, and making the sieve seam of formation become 13 ° of angles with sagittal plane is R-joining.The alternate angle of grating 3 tops two lines is 22 °; Also gluing connection in the dovetail groove of grating 3 swallow-tail forms one side insertion bracing ring 4 constitutes screen cloth, screen cloth and 2 welding of upper and lower flange, and cylinder 1 welds formation high strength R-joining screen cylinder structures with upper flange 2.

Compared with prior art, the utility model directly inserts grating owing to adopted bracing ring Enter in the dovetail groove of bracing ring and gluing connection, consist of screen cylinder, avoided rolling the distortion that causes, Not only make simply, and make the wide precision of seam improve approximately 10 times, rigidity and the stability of screen cylinder are carried Height, screening effect is good; Because grating cross section geometric techniques parameter designing is reasonable, will sieves seam and establish Count into R-joining, good slurry flow velocity is increased, the screening the pulp amount significantly improves.

Claims

1, a kind of high strength R-joining screen cylinder structure, comprise cylinder, upper and lower flange, many gratings, it is characterized in that also comprising several bracing rings (4), the radially inner side of this bracing ring (4) is evenly equipped with the dovetail groove that equates with described grating (3) quantity, one side of described grating (3) cross section is designed to the swallow-tail form that is complementary with above-mentioned dovetail groove, and it is the β angle with the vertical line of swallow-tail form bottom line for the alternate angle of R-joining, top two lines that two sides of end side become sieve seam that the α angle makes formation respectively; Also gluing connection in the dovetail groove of described grating (3) swallow-tail form one side insertion bracing ring (4).

2, high strength R-joining screen cylinder structure as claimed in claim 1 is characterized in that described α angle is 11.5～14.5 ° angle, and the β angle is 22 ° of angles.