RU2450862C1 - Device to grind unbroken grains in mixes - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to sizing particles in mixes and grinding unbroken grains to preset size in grinding mixed feed grains and other products. Proposed grinder comprises loading branch pipe, disc arranged there above, axially moving gauging deck arranged above said disc to make gauging slot, and outlet branch pipe. Radial grinding ribs are fitted on disc, on deck side, on circle with radius making 0.6-0.98 of deck inner radius.

EFFECT: reduced load on deck and higher efficiency.

2 cl, 2 dwg

Description

The invention relates to a device for separating particles in mixtures by size and grinding whole grains and large particles to a bushing size when crushing grain feedstock of mixed feeds and other products.

A device for separating mixtures is known [Patent No. 2167006, IPC V07V 7/083, 2001], including a loading nozzle, a disk located underneath with radial blades mounted on both sides of the disk, an inner and an outer chamber with exit holes located coaxially to the disk products, while the inner chamber is installed above the disk with the formation of a calibration gap. The deck is installed with the possibility of axial movement.

The disadvantage of this device is that in the production of animal feed separated whole grains and large particles, comprising a small percentage, must be additionally sent to the grinding machine. In addition, particles with a size close to the height of the calibration slit make it difficult to pass the fine fraction. The deck has a high load, which leads to rapid wear on the calibration surfaces of the disc and deck. All this leads to a decrease in the efficiency of the separation process.

The technical result of the invention is to reduce the load on the deck and increase the productivity of the installation by grinding whole grains and large particles in the area in front of the separating deck. Failure to open the outlet for the product from the inner chamber leads to the fact that whole grains and large particles cannot leave the device without undergoing destruction on the grinding ribs and without going through the calibration gap.

The problem is solved due to the fact that in the claimed device for grinding whole grains in mixtures, including a loading nozzle, a disk located under it, a calibration deck with the possibility of axial movement, mounted above the disk with the formation of a calibration gap, and an output nozzle, on the disk from the deck side radially grinding ribs are installed over a circle area with a radius of 0.6-0.98 from the inner radius of the deck, and radial grinding ribs are located above the grinding ribs mounted on the disk, which are fixed s on the housing and which completely cover the edge grinding disc.

The ribs mounted on the disk and the body form a grinding zone in front of the deck, designed to destroy whole grains and large particles in mixtures when the product moves to the calibration gap. As a result, the load on the deck is reduced, productivity is increased and there is no need to return whole grains and large particles to re-crushing the product.

Figure 1 shows the proposed device for grinding whole grains in mixtures, General view; figure 2 is the same, a top view.

The specified device consists of a loading pipe 1, a disk 2, a calibration deck 3 with the possibility of axial movement mounted above the disk 2 with the formation of a calibration gap 4, drive 5. On the disk 2 from the deck there are installed radially grinding ribs 6 over a circle area with a radius of 0, 6-0.98 from the inner radius of the deck. Above the grinding ribs 6 are located radially grinding ribs 7, which are attached to the housing 8. For the output of products provides an outlet pipe 9.

The device operates as follows.

The product enters through the loading pipe 1 to the rotating disk 2 and under the action of centrifugal forces moves along the grinding ribs 6. When moving along the grinding ribs 6, large particles are subjected to the destructive effect of grinding ribs 6 and 7. In this case, small particles freely pass to the calibration gap 4, which controls the size of the product. If the product particles are greater than the height of the calibration slit 4, then they are delayed in the grinding zone, where they are destroyed to the passage size by grinding ribs 6 and 7. The product of the required size is discharged through the pipe 9.

Claims (2)

1. A device for grinding whole grains in mixtures, including a loading nozzle, a disk located underneath it, an axial displacement calibration deck installed above the disk to form a calibration gap, and an output nozzle, characterized in that the disk, from the deck, is installed radially grinding ribs, over the area of a circle with a radius of 0.6-0.98 from the inner radius of the deck. 2. The device according to claim 1, characterized in that above the grinding ribs mounted on the disk, there are radial grinding ribs that are mounted on the housing and which completely overlap the grinding ribs of the disk.

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