Milled screen stencil structure with conical filtering surface for pusher centrifuge and method for machining same

Abstract

The invention relates to the technical field of machine tools, in particular to a milled screen stencil structure with a conical filtering surface for a pusher centrifuge, which aims to solve the problem that material pushing is blocked due to over-great resistance to the material pushing when a material pushing disk or a first-stage rotating drum of the pusher centrifuge forwards pushes materials. In the milled screen stencil structure, through grooves in parallel with one another are machined axially on a milled screen stencil with the conical filtering surface; and the two ends and middle part of a cylindrical body are provided with a connecting body respectively. Expanded metal is obtained by machining the axial cylinder wall of the conical cylindrical body and then axially cutting the axial cylinder wall open for back-scrolling; and an inner hole of the expanded metal has conicity, while the cylinder wall is provided with the trapezoidal through grooves. The milled screen stencil structure avoids the phenomena of material jamming and material pushing stoppage in normal work, and has low aggregate cost and long service life.

Description

technical field [0001] The invention relates to the technical field of machine tool processing, in particular to a milling screen structure and a processing method for a conical filter surface of a pusher centrifuge. Background technique [0002] The pusher centrifuge is a high-efficiency filter centrifuge with continuous operation. The suspension that needs to be separated enters the centrifuge continuously through the feeding device, is accelerated by the feed distributor and evenly sprinkled in the first-stage drum, and the solid Part of the filter cake is trapped on the screen to form an annular filter cake, and the first-stage drum, which is both rotating and reciprocating, pushes this part of the filter cake forward along the axial direction of the drum for a certain distance during the return stroke. During the process, the subsequent material coming in on the sieve vacated by the filter cake forms a new filter cake. With the reciprocating movement of the first-stage...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that when the pushing plate or the first-stage drum of the pushing centrifuge pushes the material forward, the resistance of pushing the material is too large, which causes the bolts under the force of the drum to break, and when the viscosity of the material is too high In the case of large or too much feed, the resistance of the filter cake in the drum increases, which hinders the progress of pushing materials and affects the normal operation of the machine.

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