CZ298204B6 - Device for feeding and sorting bulk to lumpy material - Google Patents

Abstract

The invented device for feeding and sorting bulk to lumpy material is provided with a vibration exciter (9) formed by at least two rotating shafts (2). Each shaft (2) is provided with at least one counterweight (21). The vibration exciter (9) shafts (2), anchored in bearings underneath a feeder, have axes perpendicular to a vertical plane passed by the feeder longitudinal axis whereby a vertical line (3) erected in the half of a connecting line (22) of the shaft axes (2) forms with the feeder bottom (4) an angle of 25 to 45 degrees. In another embodiment, the vibration exciter (9) shafts (2) are driven by a control electric motor (7) and a controlled electric motor (8), which both control synchronous position of rotating counterweights (21). At the same time, the shafts (2) are provided with a system (10) of two frequency converters of rotation and incremental sensors for angular displacement of the counterweights (21) in a plane perpendicular to the shaft (2) axes within the range of -40 to +40 degrees relative to the connecting line (22) of the shaft (2) axes.

Description

The invention relates to a device for feeding and sorting raw materials, in particular for feeding and sorting bulk granular to boulder materials.

BACKGROUND OF THE INVENTION

Due to the variety of materials that need to be moved or delivered and sorted in different industries, such as ruby. crushed aggregates, clay and various adhesive materials are used in various types of feeders. For feeding, devices with a rectilinear movement are used, for sorting devices with an elliptical or circular movement are used. The shape and angle of the oscillation curve of the device is usually formed by a pair of unbalanced exciters on the shaft, their location, interconnection, and the resulting vector of forces generated by the exciters. The self-synchronizing effect of the pair of exciters or their mechanical coupling, for example by a gear, is used to provide the desired resultant force vector.

In practice, there are often specific requirements for feeders, such as a certain volumetric performance, fluency of feeding, and at the same time the ability to separate smaller fractions. In order to achieve optimum function and working comfort, it is desirable that the technical arrangement of the feeder be solved comprehensively, i.e. from the hopper to the material outlet. SUMMARY OF THE INVENTION It is an object of the present invention to provide a suitable compromise satisfying the stated requirements.

The essence of you finding

The object essentially fulfills the apparatus for feeding and sorting bulk to boulder material according to the invention, which is provided with a housing oscillator comprising at least two rotating shafts, each shaft having at least one unbalance, the principle being that the exciter shafts anchored in bearings under the feeder, have an angle perpendicular to the vertical plane intersected by the longitudinal axis of the feeder. The perpendicular erected in the middle of the shaft axis line forms an angle of 25 to 45 ° with the feeder bottom 35.

The rotating exciter shafts are ideally located in one third of the ground planes of the feeder length, measured from the hopper. For a good function of the exciter, it is recommended that the perpendicular upright in the middle of the shaft axis line runs through the center of gravity of the feeder.

This object also fulfills a further independent solution of the device for feeding and sorting of loose to boulder material, which is equipped with an oscillator consisting of at least two rotating shafts. wherein each shaft is provided with at least one unbalance, the essence of which is that the oscillator exciter shafts are driven by a control electric motor and a controlled electric motor control? or synchronous position of rotating unbalances. The shaft axes are provided with a set of two frequency converters and incremental sensors for rotating the synchronous position of the unbalance in a plane perpendicular to the shaft axes in the range of -40 to + 40 ° with respect to the shaft axis joint.

Both solutions create conditions where the feeder end provided with a slatted surface oscillates predominantly by elliptical movement for material sorting, the center of the feeder vibrates by a flat almost rectilinear motion at an adjustable angle of inclination of the feeder bottom suitable for material feed, and it oscillates in an almost linear motion with the angle of inclination affected by the material layer in the hopper. The angle decreases with a larger layer of material.

This achieves a good screening effect of the slatted surface and sufficient feed efficiency in the central part.

Advantageously, the lower feed power in the feed portion forms a higher layer of material forming a stock at relative rest.

Overview of the drawings

The described invention of a vibratory grate feeder is shown schematically in the attached drawing. Fig. 1 is a side view and Fig. 2 is a front view with a pair of electric motors and a non-weighing shaft visible at the bottom.

DETAILED DESCRIPTION OF THE INVENTION

The device according to the invention, intended for feeding and partial sorting of grained to boulder material. it consists of a hopper 5 with a full bottom 4 passing into a cascade of grate surfaces 6. It is provided with a pair of sidewalls. so that they form a housing 1 mounted on resilient supports 1. The pulsating movement of the housing 1 is driven by the oscillator 9. It consists of at least two rolling shafts 2 attached to the housing 1 in bearings under the feeder. Each shaft 2 has at least one unbalance 21 In a preferred embodiment for optimum performance, the shafts 2 are located in one third of the plan view of the feeder, measured from the hopper end of the hopper 5. The shafts 2 have axes perpendicular to the vertical plane intersected by the longitudinal axis of the feeder, in the middle of the connecting line 22, the axes of the shafts 2 form an angle of 25 to 45 ° with the feeder bottom 4 and pass through the center of gravity 31 of the feeder. The shafts 2 of the oscillator 9 are driven by a control electric motor 7 and a controlled electric motor 8 controlling the synchronous position of the rotating unbalance 21. The shaft axes 2 are provided with a system 10 of two frequency converters and incremental sensors to rotate their synchronous position. -40 to »40 °.

The different shape, direction and magnitude of oscillations along the length of the barfeeder create different material forward speeds. The end of the feeder provided with a grate surface 6 or a cascade of grate surfaces 6 oscillates predominantly by an elliptical movement, thus suitable for material sorting. The center of the feeder oscillates in a flat almost straight motion at an adjustable angle of inclination of the feeder bottom suitable for material feed. At the point of entry into the hopper 5, it then oscillates in an almost linear motion with the angle of inclination affected by the material layer in the hopper 5. The angle decreases with the larger material layer.

As a result, a good screening effect of the grate surface 6 and a sufficient feeding speed in the central part are achieved. Preferably, the lower feed rate in the feed portion forms a higher layer of material forming a stock at relative rest. The height of the material layer on the feeder forms a longitudinal section of the dish with the lowest point on the grate surface 6 and the highest point in the hopper part of the hopper 5.

Industrial applicability

The material feeding and sorting device of the invention can be industrially manufactured for use in a variety of areas where bulk to boulder materials need to be fed and sorted.

PATENT CLAIMS

Claims (4)

PATENT CLAIMS An apparatus for the feeding and sorting of bulk to boulder material, which is equipped with an oscillator of at least two rotating shafts, each shaft having at least one unbalance. characterized by three. that the exciter shafts (2) anchored in bearings below the feeder have axes perpendicular to the vertical plane intersected by the longitudinal axis of the feeder, the perpendicular (3) erected in the middle of the link (22) of the axles of the shafts (2) to the bottom (4) feeder angle 25 to 45 °. 2. An apparatus for feeding and sorting bulk to boulder material, which is equipped with an oscillator consisting of at least two rotating shafts, each shaft having at least one unbalance. characterized by. The shaft axis (2) of the oscillator (9) is driven by a control electric motor (7) and a controlled electric motor (8) controlling the synchronous position of the rotating unbalance (21). wherein the axles of the shafts (2) are provided with a system (10) of two frequency converters and incremental sensors for rotating the synchronous position of the unbalance (21) in a plane perpendicular to the axes of the shafts (2) within -40 to + 40 ° to the link (22) shaft axles (2). Device for feeding and sorting bulk material to boulder according to claim 1, characterized in that. wherein the rotating shafts (2) of the exciter (9) are located in one third of the plan view of the feeder length measured from the entrance to the hopper (5). A device for feeding and sorting bulk to boulder material according to claim 1, characterized in that. The vertical axis (3) erected in the middle of the connecting line (22) of the axles of the shafts (2) runs through the center of gravity (31) of the feeder. 1 in the chair