RU1775095C - Tea grading device - Google Patents

Abstract

The invention relates to devices for sorting and can be used for sorting a semi-finished product. The device for sorting is equipped with load-bearing elements in the form of rods located in the same plane above the surface of the sorting sieve along its length and parallel to it at an equal distance from each other, with an orientation device empty boxes with bulk material with the open lid down parallel to the surface of the sorting sieve, made in the form of guides forming a receiving hopper with a section corresponding to the horizontal section of the emptied boxes, one of the walls of which coincides with the rear end-side of the device, as well as a device for orienting the emptied boxes with bulk material along the supporting elements after the boxes are hit by these elements, made in the form of a rectangular box a section, the side walls of which coincide with the side sides of the device, with a section corresponding to the vertical section of the emptied boxes, perpendicular to the direction of their movement. 2 ill.

Description

The invention relates to sorting devices and can be used to sort tea semi-finished products.

A known sorting machine, including a dosing cleaner, an elevator, paired frames with replaceable sieves and tea cutters, is mounted. In this case, the dosing cleaner is made in the form of a bunker with an air supply window, a vertically arranged shield at the entrance and a sluice gate installed at the outlet from the hopper, and each pair of screens is equipped with sorting microcameras located below them; the elevator is equipped with a hopper and a layer leveling mechanism; the frames are equipped with a mechanism for tensioning sieves, consisting of

threaded rods reinforced across the frames with nuts.

Despite the presence of a dispenser and an elevator, the material to be sorted must still be fed in small portions. There is no possibility of feeding material directly from tea boxes. This leads to the need for the availability and operation of additional equipment for emptying the boxes and feeding the sortable material into the device in small portions, which complicates the process, increases material losses and increases labor and economic costs of the process.

Closest to the proposed in technical essence and design ow X | Xi

Joint venture

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there is a sorting device comprising a fixed frame, a sorting frame with rear and side walls and sorting screens mounted on it by means of suspensions, a material collector located under the sorting screens, a metering device mounted on a fixed frame above the sorting frame with rollers having combs and circular knives, and a drive including a crankshaft and a crank mechanism.

In secondary tea factories, the semi-finished tea to be sorted is unloaded from the tea boxes. However, the unloading of the boxes is carried out manually, for which the box is tipped open end down and vibrated to completely unload the box. This complicates the technological process, worsens sanitary conditions and leads to significant labor costs. The unloading time of one box is also increased, which accordingly increases the total duration of the technological process, i.e. reduces labor productivity. Hard work, in turn, eliminates the reliable unloading of cabins and leads to significant losses of valuable tea semi-finished product. Losses during unloading of one box are 80 ... 100 g. In addition, after unloading the box, an additional device is required for transporting and feeding the tea unloaded from the box to the sorting device. This further complicates the process and increases the economic costs of its implementation.

The purpose of the invention is to reduce product losses and improve working conditions by simplifying the process.

In FIG. 1 is a schematic diagram of a sorting apparatus; in FIG. 2 is a section AA in FIG. 1.

The sorting device comprises a fixed frame 1. A sorting frame 3 is mounted by means of suspensions 2 on the fixed frame 1. The latter comprises a rear 4 and side 5 sides. At the bottom of the sorting frame 3, sorting sieves 6 are placed. The number of sorting sieves 6 and the sizes of their cells depend on the number and numbers of prefabricated fractions sorted on this device. Under the sorting sieves 6, a material collector 7 is placed on the frame, the collector 7 has partitions 8 and side windows 9 at the end of each new sieve 6 for separate removal of sorted different fractions. On the frame 1 there is a drive consisting of an electric motor 10 and connected to it

crankshaft 11. The latter is connected to the sorting frame 3 by means of a crank mechanism. Sorting frame 3 is equipped with located

parallel to the sorting screen, longitudinal guides made in the form of pipes 13. The pipes 13 are located in the same plane at an equal distance from each other. The distance between the pipes 13

0 and sorting sieve 6 must exceed the height of the layer of material to be sorted (this distance for the tea semi-finished product is 200 ... 250 mm). The device is equipped with a device for orienting the emptied boxes with the bulk material with the lid open downward, made in the form of guides 14. The guides 14 are placed parallel to the surface of the sorting sieve 6 and form a receiving hopper, one whose back wall coincides with the rear end face 4 of the sorting frames 3. Moreover, the cross section of the formed hopper corresponds to the horizontal section of the empty boxes. The guides 14 can be made, for example, in the form of pipes located along the sorting frame 3. By means of crossbars and racks 15, the guides 14 are fixedly attached to the frame 1. The guides 14 together with the side walls 5 and the pipes 13 of the sorting frame 3 form device for orienting i empty boxes with bulk material along pipes 13 after

5 hit of the box on these elements. The cross section of this orienting device corresponds to the vertical section of the emptied boxes, perpendicular to the direction of their movement,

0 The device operates as follows.

Turning on the electric motor 10 rotates the crankshaft 11, the latter by

5 of the crank mechanism 12 transmits a reciprocating vibrational movement of the sorting frame 3, which starts oscillating motions relative to the fixed frame 1 by means of the suspensions 2. The tea to be sorted is located in the tea box. To feed the material into the sorting device, one (upper) end of the box is previously opened, and in such

5, the box is tilted into the 4 receiving hopper formed by the rear endboard 4 of the sorting frame and the guides 14 fixed. In this case, the tea box falls onto the pipes 13 of the bearing element. The oscillation of the sorting frame 3

It determines the gradual movement of the box along the pipes 13 to the discharge end of the device. At the same time, due to the oscillatory movement and its placement with the open end down, the product comes out of the latter - semi-finished tea - and is poured onto sorting sieve 6 (pipes 13 cannot hold tea). The oscillation of the sorting sieve 6 provides sorting of the product and its gradual movement to the discharge end of the device. The sifted part of the product is poured into the collector 7 located under the sieve 6 and discharged through its window 9, The unsolicited part of the material - a similar fraction - from the sorting sieve 6 is poured onto the conveyor located in the front unloading part of the device and transferred to the next operation. The tea box also moves forward to the unloading device and gradually completely unloads. This is facilitated by the constant oscillation of the sorting frame, and, accordingly, the shchiks, as well as the fact that the teahouse is open end down all the time. When moving on the sorting frame, the box cannot overturn. This is achieved by moving the box in the box of rectangular cross-section of the device for orienting the emptied boxes with bulk material. Here the box moves on the pipes 13. At the same time, on the sides of the box

Claims (1)

It is limited by the side boards 15 by the warp frame 3. And on the top by the rails 14. A box completely unloaded from the product slides along the tubes 13 in the unloading part of the sorting sieve in the unloading part of the sorting frame 3 and is discharged from the device. After that, a new box is fed to the sorting frame, filled with the semi-finished product to be sorted. A new box can also be fed until the first box is completely out of the device. It is only necessary to take into account the time that prevents the collision of two boxes. SUMMARY OF THE INVENTION A tea sorting device, comprising a fixed frame mounted on it by means of suspensions, a sorting frame with rear and side sides and sorting screens, a material collector located under the sorting screens, a drive including a crankshaft and a crank mechanism, characterized in that, in order to reduce product losses and improve working conditions by simplifying the process, the sorting frame is provided with longitudinally arranged parallel to the sorting sieve bubbled guide in the form of tubes, placed at equal distance from each other and forming with the rear side means for orienting schikov open part down. / 3 fn / g - // Ґt