SU1671754A1 - Screen for sorting fibrous suspension - Google Patents

Abstract

This invention relates to a technique for sorting a fiber suspension and can be used in the pulp and paper industry. The purpose of the invention is to reduce the labor intensity of sieve assembly and to ensure an increase in the productivity of the sorting process. The sieve for sorting the fibrous suspension consists of adjacent one profiled elements 1 forming a sorting surface in the form of a rotating body, two frame flanges 2 and 3 installed with axial reciprocating movement, and means for retaining the profiled elements 1 made in the form of consisting of separate sectors 4 and 5 of additional flanges 6 and 7 mounted on frame flanges 2 and 3 with the possibility of radial reciprocating movement. The total length of sectors 4 and 5 of additional flanges 6 and 7 does not exceed the perimeter of the cross section of the screening surface of the sieve formed by the profiled elements 1. Frame flanges 2 and 3 and sectors 4 and 5 of additional flanges 6 and 7 are interconnected via frame flanges 2 and 3 radial grooves 8 and 9 and holes 10 on sectors 4 and 5 with bolts 11 with nuts 12. Axial reciprocating movement of frame flanges 2 and 3 is carried out by means of nuts 13 on studs 14. 2 Il.

Description

This invention relates to a technique for sorting a fiber suspension and can be used in the pulp and paper industry.

The purpose of the invention is to reduce the labor intensity of sieve assembly and increase the productivity of the sorting process.

Figure 1 shows a screen for sorting a fiber suspension; figure 2 - section aa in figure 1.

The sieve for sorting the fibrous suspension consists of adjacent one profiled elements 1 forming a sorting surface in the form of a rotating body, two frame flanges 2 and 3 installed with axial reciprocating movement, and means for retaining the profiled elements 1 made in the form of consisting of separate sectors 4 and 5 of additional flanges 6 and 7 mounted on frame flanges 2 and 3 with the possibility of radial reciprocating movement. The total length of sectors 4 and 5 of additional flanges 6 and 7 does not exceed the perimeter of the cross section of the screening surface of the sieve formed by the profiled elements 1. Frame flanges 2 and 3 and sectors 4 and 5 of additional flanges 6 and 7 are interconnected via frame flanges 2 and 3 radial grooves 8 and 9 and holes 10 on sectors 4 and 5 with bolts 11 with nuts 12. Axial reciprocating movement of frame flanges 2 and 3 is carried out by means of nuts 13 on studs 14.

A sieve for sorting the fiber suspension is assembled and disassembled as follows.

Before assembling the sieve, frame flanges 2 and 3 are pushed over studs 14 with nuts 13, and sections 4 and 5 of additional flanges b and 7 are pushed apart with loosened bolts 11. Then, the estimated number of profiled elements 1 necessary to obtain the specified diameter of sieve is installed on sectors 4 and 5 . Sectors 4 of additional flange 6 and opposite sectors 5 of flange 7 are shifted on bolts 11 along radial grooves 8 and 9 of frame flanges 2 and 3 to the center of the sieve until the gap between elements 1 is removed, and then fixed by bolts 11 with nuts 12 on frame flanges 2 and 3 After that, the flanges 2 and 3 of the nuts 13 on the studs 14 are moved apart, the profiled elements 1 are fixed with curved (arc) ends on the sectors

4 and 5 additional flanges 6 and 7, while the profiled elements 1 are tensioned, which provides additional

strength of the elements 1, preventing the swelling of the sieve when it is working under pressure, For tightness between sectors 4, additional flange 6 and sectors

5 flanges 7 can be fitted with gaskets. Tightness between flanges 6 and 7 and

frame flanges 2 and 3 is achieved by appropriately treating their surfaces and pressing them with bolts 11.

When disassembling the sieve frame flanges 2

and 3 nuts 13 are shifted by studs 14, sectors 4 and 5 of additional flanges 6 and 7 are detached from flanges 2 and 3 by loosening bolts 11 and then pushed along radial grooves 8 and 9 of flanges 2 and 3.

The outdated shaped elements 1 are replaced with new ones, then the sieve is assembled. The deviation of the width of the new profiled elements 1 does not affect the labor intensity of the assembly of the sieve.

Thus, the proposed sieve ensures the laboriousness of its assembly much lower than the existing sieves by rigid fastening of the profiled elements and increasing the productivity of the process

sorting by increasing the perforation rate of the sieve (number of holes per unit area) due to the lack of fasteners and stiffeners located on the sorting surface.

Claims (1)

A sieve for sorting a fibrous suspension, including profiled elements adjacent to one another, forming a sorting surface in the form of a body of rotation, means for holding the profiled elements and two frame flanges installed with the possibility of axial reciprocating displacement, characterized in that, in order to reduce the laboriousness of the assembly and increase productivity, the means for retaining the profiled elements is made up of additional flanges mounted on the frame flanges with the possibility of radial reciprocating movement, while the total length of the sectors is not greater than the perimeter of the cross section of the sorting surface formed by the profile elements. 2 four FIG. 2