RU92364U1 - SCREEN FOR WET BULK MATERIALS - Google Patents

Abstract

1. A screen for wet bulk materials, including a box, movable and fixed frames placed in the box at an angle to the horizon, a screening surface in the form of strings, a loading and unloading device, characterized in that the screen is equipped with a scraper conveyor-feeder, the bottom of which is made in diagonal slit. ! 2. The screen for wet bulk materials according to claim 1, characterized in that it is equipped with an electromechanical vibrator.

Description

The utility model relates to the technique of separation of bulk materials by size and is intended for the classification of coal and other materials of high humidity.

A known screen for wet bulk materials (a.s. 466917 class B07B 1/46, 1977), including a box, a movable and fixed frame, placed in a box at an angle to the horizon, a screening surface in the form of strings, and the strings are fixed on one of frames, loading funnel and estrus for oversize and sublattice products. The disadvantage of this screen is its low productivity.

The closest in technical essence to the proposed one is a screen for wet bulk materials (a.s. 1088815 class B07B 1/00 dated 01/06/1983) The screen includes a base on which a frame is mounted, connected to the base via a hinge and a lifting device. The frame serves to change the angle of inclination of the main screening surface consisting of a movable and fixed frame. Inside the fixed frame there are metal rails with holes for strings. The strings are attached to the side shelves of the movable frame using clamps. The movable frame is connected to the fixed frame by means of axles and supports located on the fixed frame. A drive is located on the platform of the fixed frame, which is connected via a rod to the movable frame.

An additional parabolic screening surface is attached to the fixed frame by means of a hinge.

Changing the position of the additional screening surface in the vertical plane is carried out by means of a lifting device. On the parabolic screening surface, there are hollow grates with holes for ejecting water jets, to which water is supplied by means of a water conduit.

Hollow grates are installed alternating with strings through 5-10 strings. On the frame there is a box with a loading funnel and estrus for the removal of over-sieve and under-sieve products.

The roar works as follows.

Through the loading funnel, the material enters the main screening surface formed by the strings on the movable frame and moves along it under the influence of its own weight, and undergoes considerable particle size separation. On a parabolic screening surface, the material flow changes the direction of movement, while the particles are subjected to centrifugal forces, which contribute to the removal of small fractions into the sublattice product, while large particles move along the screening parabolic surface and are pressed to the strings to further clean them. The strings of the main scattering surface are cleaned by the reciprocating movement of the movable frame. The installation of grates with the possibility of rotation around its axis allows you to achieve an additional effect with wet screening, in which jets of water are used in different directions - towards the movement of the material, perpendicular to the movement of the material or in the direction of movement of the material.

The disadvantage of the described screen is:

1. The supply of water, which moisturizes the material, resulting in additional sludge formation, which requires additional costs for its capture and dehydration.

2. The limited width of the screen, which is associated with the limited ability to uniformly load it in width.

The purpose of the proposed utility model is to exclude water supply for wet screening, increase screening productivity, increase screening efficiency and screening efficiency of smaller classes.

This goal is achieved by the fact that the screen is equipped with a scraper conveyor - feeder, the bottom of which is made in the form of a slit along the diagonal, which allows for uniform loading of the material with a thin layer.

The width of the screen is adopted depending on the performance and screening required class.

The screen is equipped with an electromechanical vibrator, which is used as necessary.

The figure 1 shows a screen for wet bulk materials, which consists of a base 1, on which a frame 2 is mounted, connected to the base 1 by a hinge 3 and a lifting device 4. The frame 2 is used to change the angle of inclination of the screening surface 5, consisting of a movable frame 6 and fixed frame 7.

Inside the frame 7 there are metal strips with holes for strings 9, which are attached to the side shelves of the movable frame 6.

The movable frame 6 is connected to the fixed frame 7 by means of a strip clamping the strings to the movable frame 6. On the platform 10 there is an actuator 11, which is connected to the movable frame 6 by means of a crank mechanism 12 and is designed to clean the sifting surface from adhering material due to the return translational motion.

The screen is equipped with a scraper conveyor-feeder 13, the bottom of which is made in the form of a slit along the diagonal, which allows you to evenly load the screen with a thin layer over the entire width for effective screening of the required classes. The width of the screen is taken depending on the desired performance and screening required class. The screen is equipped with an electromechanical vibrator 14, which is used as necessary.

The roar works as follows.

The material with the help of a scraper conveyor-feeder enters the loading device, which distributes it evenly with a thin layer over the entire width of the screening surface. The material moves by gravity along the scattering surface at a speed set at a given angle of inclination to the horizon, depending on the required size of the screening material.

After the test, the proposed screen is used at Guokovskaya Central Processing Plant OJSC in the amount of 2 pieces with a width of 5 m, which is loaded with one scraper conveyor-feeder.

Claims (2)

1. A screen for wet bulk materials, including a box, movable and fixed frames placed in the box at an angle to the horizon, a screening surface in the form of strings, a loading and unloading device, characterized in that the screen is equipped with a scraper conveyor-feeder, the bottom of which is made in diagonal slit. 2. The screen for wet bulk materials according to claim 1, characterized in that it is equipped with an electromechanical vibrator.