SU1574816A1 - Screw press for forming raw peat - Google Patents

Abstract

The invention relates to the processing of plastic materials, such as raw peat, and can be used in machines for the extraction of lump molded peat and devices for the granulation of plastic materials. The goal is to increase the productivity of the press while improving the quality of the product by increasing the degree of mechanical processing of raw peat. Screw press contains a casing 1 with a hopper 2, forming unit 3 and a drive. In the casing 1 a core 4 is installed with an internal screw blade (VL) 5 and an additional outer VL 6 wound on it. The latter has the direction of the turns of the helix opposite to the VL 5 and a large step size. The drive is made in the form of a single-stage reducer with a braked shaft, the sun gear 9 of which is rigidly connected to VL 5, and the crown gear is connected to VL 6. Raw peat from the hopper 2 enters the inter-turn spaces of VL 5 and 6, rotating in different directions. Due to the force of friction of raw peat against the casing 1 and the core 4, it under pressure moves along the core along the inter-turn spaces of the VL 5.6, the transition from one to another. Intensive grinding and grinding of peat mass occurs. The processed peat mass passes to the window of the forming unit and is extruded in the form of compacted compacted pieces. 3 il.

Description

The invention relates to the field of processing plastic materials, such as raw peat, and can be used in the working bodies of machines for the extraction of lump molded peat and devices for granulating plastic materials.

The purpose of the invention is to increase the productivity of the press while improving the quality of the product by increasing the degree of mechanical processing of raw peat.

FIG. 1 shows a general view of the press (longitudinal section); in fig. 2 is a section A-A in FIG. one; in fig. 3 shows the drive of the device (type B in FIG. 1).

A screw press contains a casing 1 with a hopper 2, a forming device 3, a core 4. for which the main (internal) 5 and additional (external) 6 screw blades are placed, as well as a drive made in the form of a single-stage planetary gear 7. The external screw blade has the direction of the coils of the spiral opposite to the inner blade and a large step size. One end of the core is mounted in bearings 8, the outer rings of which are mounted in the driving sun gear 9 of the planetary gearbox, and the other end is rigidly fixed in the forming unit. The sun gear 9 is rigidly connected to an internal helical blade 5 located axially relative to the core. Drove 10 on which j

00

35

The satellite systems 11 are rigidly connected to the housing 12 mounted on the press casing. The crown gear 13 of the planetary gearbox is rigidly connected to the outer chin blade, which is coaxially located relative to the core and the inner screw blade.

Screw press works as follows.

The material, for example, peat-cheese, from the hopper 2 enters the inter-space of the hopper rotating in different directions of the inner 5 and outer 6 screw blades. With the force of friction of raw peat against the casing 1 and the core 4, it moves under pressure along the core through the inter-turn spaces of both screw blades, the transition from one to another, resulting in intensive grinding and lane (peat rubbing.

The recalculation of the peat mass flows to the window of the forming device 3 and is caught in the form of compacted compressed pieces.

The rotation of the propeller blades is carried out / n; etsk from a single-stage planetary rotor to k. 7 (internal LOPR, sg - on the sun gear 9, and the outer blade from koton gear 13, which Slago- zyr slowed down drove 0 opposite direction). As a result, the shear surface tof, that is, its degree of mechanical processing increases significantly. In this case, a shift occurs between three surfaces between the inner surface of the casing 1 and the second (outer; screw blade 6, between the two blades of the blades and between the first (inner) RYNTHOSIS blade 5 and the surface of the core 4) Due to the opposite removal of the inner 5 and outer the screw blades and the counter-direction of their rotation, the large woody inclusions trapped in the press are ground by the screw blades and pass unhindered through the window of the forming unit 3.

In the process of press operation, peat particles that are located in the space between the inner space of the internal screw blade, rotate with greater speed than if

0

on the propeller blade, due to centrifugal forces will tend to move to the zone of the outer propeller blade, which contributes to more intensive mechanical processing of peat.

The presence in the annular gap between the core and the casing of two screw blades (internal and external), having the opposite direction of the turns of the spiral and different rotational speed, significantly increases the surface of the peat shift and thereby increase the degree of mechanical processing, i.e. to ensure the homogeneity of the peat mass and, consequently, the quality of the molded product.

The use of a core in the form of a conventional axis with a minimum diameter based on stiffness makes it possible, with the same dimensions of the press, to place in its working channel two helical blades (internal and external) and at the same time increase the useful section, for the passage of peat mass, leading to increased press performance. An increase in the useful section of the auger will provide an increase in productivity by 25-40%.

Claims (1)

Invention Formula A screw press for molding peat raw, including a casing with loading and 0 forming units, a core mounted in a co-ear with a helical blade wound on it, and an actuator, characterized in that, in order to increase the productivity of the press while improving the quality of the product by increasing the degree of mechanical processing of raw peat, the press is provided with an additional screw blade installed between the core to the casing coaxially to the core, placed from the outside, made with large pitch and having It has the opposite direction of the turns relative to the main screw blade, while the drive is made in the form of a single-stage reducer with a braked carrier, the sun gear of which is rigidly connected to the main screw blade and the crown gear with an additional screw blade. five 0 Iff / j 1 Aa FIG. 2 7 Fig.Z