RU2062700C1 - Press for expression of liquid from vegetable raw material - Google Patents

Abstract

FIELD: processing of fruits and roots; can be used for production of sugar beet juice. SUBSTANCE: press for expression of ground vegetable raw material uses a frame, on which drive drums, three pairs of vertically installed pressing rolls, electromagnetic vibrators, juice collectors are mounted. Filter tape is stretched on the grooves of guide tubes. The guide tubes are drawn together in the zone of expression so that it takes a V-shape; the rolls are installed vertically on both sides of the conveyer and are engageable with the sagged filter tape, serving as a filter at the same time. The distance between the guide tubes in the expression zone is gradually decreasing, as a result, sagging of the tape between them is increasing. Tubes with holes used to feed water and secondary juice are installed in the expression zone after the first and second pairs of rolls. The frame carries a scraper and beet pulp collector. In the offered press pressing is accomplished not in bulk, but in the lines of engagement of raw material with each pair of rolls. EFFECT: essentially decreased expression force and increased yield of juice, since it runs off under gravity over a vertical surface. 5 dwg

Description

 The invention relates to the processing of fruits and root crops and can be used to obtain sugar beet juice.

Known belt press for squeezing liquid from a plant material, containing vertically mounted conveyors with endless filter belts, forming between themselves a wedge-shaped pressing zone and equipped with pressing elements, loading means, collectors of liquid and squeezed mass [1]
The disadvantage of this press is its low productivity, the possibility of accumulation of the mass of raw materials in the wedge-shaped zone, which can lead to a decrease in fluid output and stop the press.

The closest technical solution to the proposed one is a press for squeezing liquid from plant materials, containing drive conveyors with endless filter belts forming a pressing zone between each other, pressing elements installed in the latter with a narrowing gap, juice collector and bagasse collector [2]
The disadvantages of this press include the need to have two conveyors and two separate filtering endless belts. Filtering tapes, passing juice through themselves in the pressing zone, hold part of the juice in their fabric and carry it to the washing device. This leads to loss of juice and a decrease in its yield.

 The technical result of the invention is to simplify the design of the press and increase the yield of liquid while reducing the pressing force.

 To do this, the proposed press for squeezing liquid from plant materials, containing a drive conveyor with an endless filter tape, pressing elements installed in the pressing zone with a narrowing gap, a juice collector and a pulp collector, it is equipped with two horizontal guide tubes located in the pressing zone and serving to move along them the edges of the filter tape, while the latter is placed between them so that it sags and has a V-shape in cross section, and the pressing elements made in the form of vertical rolls installed in pairs on both sides of a sagging filter tape.

 The invention is illustrated in the drawing, in which figure 1 schematically shows the proposed press, side view; FIG. 2 is a plan view of the press in FIG. 3 is a section AA of FIG. 2; in FIG. 4 a section BB of FIG. 2 and FIG. 5 is a top view of an endless filter tape with crushed material during the operation of the press.

 The press for squeezing the liquid from plant materials contains a frame 1 and a drive conveyor, including drive drums 2 with sprockets 3 mounted on the frame, a drum 2 rotation drive 4, a deflecting drum 5, a tension drum 6 and an endless filter tape 7 stretched over the 2.5 reels and 6 and two horizontal guide tubes 8 located in the pressing zone and used to move along them the edges of the filter tape, which are connected with the chains 9. The pipes 8 are located on both sides along a broken line. The filter tape is placed between them so that it sags and has a V-shape in cross section. The press is equipped with pressing elements made in the form of vertical rollers 10 installed in pairs on both sides of the sagging filter tape, juice collectors 11, a scraper 12 and a bag pulp 13.

In the loading zone, the pipes 8 are arranged so that they gradually approach each other, starting from the original width of the conveyor to a distance a ₁ between the rollers 10 of the first pair. In the pressing zone, the pipes smoothly approach each other in accordance with the decreasing distance between the rolls from a ₁ to a ₃ in each adjacent pair, after which outside the pressing zone the pipes are located at a width equal to the initial width of the conveyor, and the pressing zone after the first and second pairs of rolls 10 are installed pipes 14 with holes for supplying water and secondary juice to the pressing zone.

 Electromagnetic vibrators 15 and the drive 16 pairs of vertical rolls 10 are also mounted on the frame 1.

 Press works as follows. The drive 4 of rotation of the drum 2 and the drive 16 of the vertical rolls 10 are turned on, while the filtering tape 7, moving progressively, sags and takes a V-shape, since its edges with chains move along the guide tubes 8.

The ground mass, for example, sugar beets, enters the loading zone into the cavity formed by the sagging filter tape, in front of the first pair of rollers 10 and is placed in the pressing zone, is compressed successively by pairs of vertical rollers 10. The distance between the rollers in each subsequent pair decreases gradually from a ₁ to a ₃ , which leads to a decrease in the thickness of the squeezed layer and a sequential increase in the yield of juice. For a more complete separation of the juice into the squeezed mass after the first pair of rolls, a small amount of water is supplied through pipes 14, which leads to saturation of the squeezed mass with moisture and an increase in its volume. In this case, the electromagnetic vibrators 15, transmitting vibrations to the filter tape 7, enhance and accelerate the process of saturation of the squeezed mass with moisture. Part of the squeezed juice after the third pair of rolls is fed to the moisture of the squeezed raw material after the second pair of rolls 10. The squeezed juice is collected in the collector 11, the pulp is dumped with a scraper 12 into the collector 13.

 In the proposed press, the pressing of plant materials does not proceed along the volume, but along the contact surface of the raw material with each pair of rolls, and this contact surface increases in each subsequent pair of rolls 10 due to the greater sagging of the filter tape. In this case, the pressing force is significantly reduced in comparison with the known press, and the juice yield increases, since it drains under its own weight on the vertical surface of the tape.

 Using the press of the proposed design allows you to bring the amount of collected juice to 90-95%, which is 20-25% more compared to the known press, while the specific energy costs are reduced due to the distribution of the pressing force on a smaller mass of raw materials.

 The proposed press has a simpler design than the known one, since it has only one conveyor, and not two, as in the well-known press. YYY2 YYY4

Claims (1)

 A press for pressing liquid from vegetable raw materials, comprising a drive conveyor with an endless filter tape, pressing elements installed in the pressing zone with a narrowing gap, a juice collector and a pulp collector, characterized in that it is provided with two horizontal guide tubes located in the pressing zone and serving for moving along them the edges of the filter tape, while the latter is placed between them so that it sags and has a V-shape in cross section, and the pressing elements filled in the form of vertical rolls installed in pairs on both sides of the sagging filter tape.

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