Spiral dual-embedded screen cylinder and manufacture method thereof

Abstract

A spiral dual-embedded screen cylinder comprises a spiral rod, an external fixed ring, an internal fixed ring, a reinforced ring, an upper flange, a lower flange and a sealing ring; the spiral dual-embedded screen cylinder is characterized in that the spiral rod is embedded and positioned simultaneously by the external fixed ring and the internal fixed ring; the external fixed ring is a U-shaped material and the internal fixed ring is a flat bar; the external fixed ring is connected with the reinforced ring; two ends of the spiral rod are connected with the upper flange and the lower flange respectively; and the sealing ring is embedded on the lower flange. The screen cylinder and the manufacture method thereof have the advantages that as the spiral aperture is longer than the straight aperture, the screening aperture ratio is increased; as the spiral aperture leads the upstream type rod cylinder paper pulp easy to arise, the impurities are easy to be removed and not easy to block thescreen seam or be thickened; the rotor resistance is reduced, the energy consumption is reduced and the productivity is improved; and the method for obtaining the spiral dual-embedded fixed rod by extending the sieve plate and rolling for forming is reliable and easy, the aperture precision is high and the stability is good.

Description

technical field [0001] The invention relates to a rod screen drum for papermaking and pulping, in particular to a spiral double-embedded screen drum and a manufacturing method thereof. Background technique [0002] The pressure screen is an important equipment in the papermaking industry. The screen drum is a key component and also a vulnerable part. The screen slots of the traditional rod screen drum are arranged in a straight line. The sieve gap is inconsistent with the direction of the spirally rising pulp driven by the rotor, which increases the resistance of slag discharge, the pulp is easy to lose water, the concentration increases, and it is easy to block the sieve gap, which reduces production efficiency and increases energy consumption. In severe cases, it is easy to seal a large area As a result, the internal pressure of the sieve (sealed cylinder) increases and the drum is destroyed. Contents of the invention [0003] The object of the present invention is to p...

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Problems solved by technology

[0002] The pressure screen is an important equipment in the papermaking industry. The screen drum is a key component and also a vulnerable part. The screen slots of the traditional rod screen drum are arranged in a straight line. The sieve gap is inconsistent with the direction of the spirally rising pulp driven by the rotor, which increases the resistance of slag discharge, the pulp is easy to lose water, the concentration increases, and it is easy to block the sieve gap, which reduces production efficiency and increases energy consumption. In severe cases, it is easy to seal a large area As a result of the sieve seam (sealed cylinder), the internal pressure rises and the rod drum is destroyed

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