SU1768296A1 - Serew grinder - Google Patents

Description

The invention relates to pneumatic transportation, and in particular to the simultaneous advancement of grinding of the material to be transported.

Known screw feeder pneumatic conveying installation containing a cylindrical housing with a loading hopper and a discharge conical nozzle, inside the housing there is a drive auger equipped with a flat knife mounted on its last half-turn, placed in a conical nozzle, and wedge-shaped knives at the ends of the guide bars of the inner wall of the housing.

In this screw feeder, simultaneously with the advancement of the material, its grinding occurs due to the interaction of the flat knife of the last half-turn of the screw and the wedge-shaped knives of the guide plates of the inner wall of the feeder housing, however, due to the limited length of the grinding zone, the degree of grinding decreases and, as a result, the density of the material at the outlet of the feeder , and also in this feeder there is a quick wear of the knives and its reliability is reduced. All this leads to low feeder performance.

A known machine for the manufacture of culinary products, including a conical housing with a loading hopper and placed inside the housing of the drive auger conical shape with a variable axial pitch and a variable distance between the surfaces of the turns.

The disadvantage of this machine is its low productivity, since it is impossible to achieve the necessary degree of grinding and compaction of the material.

The purpose of the invention is to increase productivity,

This goal is achieved by the fact that the screw shredder is equipped with knives of variable cross section, fixed about? lengthwise on the inner surface of the conical body, at an equal distance from each other and with the same gap between the edge of each knife and the turns of the screw.

On Fig, 1 presents a screw chopper, General view; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - section BB in FIG. 1; FIG. 4 is a view B of FIG. 1.

The screw shredder of the pneumatic conveying installation contains a conical housing 1 with a loading hopper 2. Inside the housing 1 there is a conical drive screw 3 with a variable axial pitch and a variable distance between the surfaces of the turns, connected at one end with an electric drive 4. A disk 5 is fixedly mounted on the other end of the drive screw by means of a bolt 6. The disk 5 is located in the support of the screw 7, mounted on the housing 1. In the housing 1 on its inner surface are fixed equidistant from each other with the same clearance from the image uyuschey cone surface of the screw 3 smaller cross sections in the side of the smaller base of the conical body 1 knives 8 variable section.

The chopper works as follows.

The screw 3 is driven by an electric drive 4. The material coming from the feed hopper 2 into the conical body 1 is simultaneously crushed and moved to the side of the smaller base of the conical body 1. Grinding is carried out using the screw 3 with a variable axial pitch and a variable distance between the surfaces of the turns and knives 8 variable sections gradually over the entire length of the grinding from a low degree of grinding at the inlet to a high degree of grinding at the exit of the grinder. The material is moved with the help of a screw 3 along its spiral surface between the knives 8 of variable cross section, which simultaneously perform the functions of guides with a higher speed due to the variable distance between the surfaces of the turns of the screw. Due to the conical body 1 and the conical screw 3 with a variable maximum pitch, the material moved in the grinder is compacted along the entire length of the grinder. At the exit, the material, passing through the hole of the disk 5, which rotates together with the screw 3 in the support 7, has a high degree of compaction.

Screw shredder allows you to use it in a pneumatic installation for the transportation of various materials, such as hay, grass, waste from livestock farms, poultry farms, wood chips and viscous materials.

Claims (1)

Claim Screw shredder, comprising a conical body with a loading hopper and a conical-shaped drive auger with a variable axial pitch and a variable distance between the turns of the coils located inside the case, characterized in that, in order to increase productivity, it is equipped with knives of variable cross section mounted longitudinally on the inner surface of the conical case, at an equal distance from each other and with the same gap between the edge of each knife and the turns of the screw. Bb Fig.Z Bid Compiled by V. Vygonny Editor Tehred M. Morgenthal Corrector M. Andrushenko Order 3605 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St. ---- d G /