RU54023U1 - RELOADING DEVICE - Google Patents

Abstract

The reloading device belongs to the field of transportation and can be used at crushing and screening enterprises when reloading the rock mass from one conveyor to another. To ensure smooth flow of the transported material, mainly crushed rock mass, a estrus design is proposed that includes a bottom with a horseshoe-shaped protrusion. The width of the estrus is from 0.6 to 0.8 of the width of the conveyor belt, the length and width of the horseshoe-shaped protrusion are at least two maximum sizes of pieces of transported material. The slope of the bottom is less than the angle of repose of the transported material, and the angle between the horizon and the line connecting the extreme point of the horseshoe-shaped protrusion and the upper point of the rear wall of the estrus is greater than the angle of repose of the transported material.

Description

The utility model relates to the field of transportation, mainly by conveyor systems, and can also be applied in mining and construction.

Transportation of goods and materials using conveyors in the schemes of various technological processes for frequent involves overload when moving from one to another, for example, screening, sorting, unloading, changing the direction of movement, etc.

Reloading devices in mining have their own characteristics. When crushing ore and non-metallic materials, transportation of finished and intermediate fractions of the rock is carried out by conveyors. Moreover, the production technology requires overloading the crushed mass from one conveyor to another.

Handling devices are known (certificate of the Russian Federation for utility model No. 2648, patent of the Russian Federation No. 2001016, and the USSR AS No. 1712276). In these overload nodes, the rock from the feed conveyor either falls and moves along an inclined surface (estrus), or falls directly onto the falling conveyor. Such rock overloading schemes require lining of an inclined estrus plate, frequent change of the conveyor belt due to increased wear as a result of falling pieces, as well as material pouring over the side surfaces of the conveyor and even a “pseudo-reverse” rock mass is observed.

The purpose of the utility model is the construction of estrus, providing smooth (laminar) swelling of the transported material, such as crushed stone, from the feed conveyor to the feed.

To achieve this goal, the design of a reloading device in the form of a estrus with a bottom, in which a horseshoe-shaped cutout is made, has been developed. The bottom of the estrus is made at an angle to the horizon with an angle less than the angle of repose of the transported material (Norms of technological design of industrial enterprises of non-metallic building materials, Stroyizdat, L., 1977, p. 360). With this choice of the angle of inclination, the bottom is self-lined with the material transported. The horseshoe-shaped cutout in the best way ensures the formation of a jet flowing down from the wall and the sides of the estrus onto the conveyor belt.

To exclude clogging of the cutout, its width and length are selected at least two maximum sizes of a piece of transported material. For example, when overloading the rock mass of a fraction of 0-100 mm, the length and width of the cut-out is not less than 200 mm.

To reduce the likelihood of material spilling beyond the permissible limits, the width of the transfer unit is selected in the range from 0.6 to 0.8 of the width of the conveyor belt. In specific cases, this ratio is specified depending on the angle of inclination of the side rollers of the conveyor.

In the design of the device, the height of the rear wall should provide reliable swelling of the entire rock mass through a cutout on the conveyor belt. This is ensured when the angle between the horizon and the line connecting the extreme point of the horseshoe-shaped cutout and the upper point of the back wall is greater than the angle of repose of the transported material. For various materials and their fractional composition, the angle of repose varies, as a rule, from 20 to 60 degrees.

Schematically, a reloading device is shown in the diagram (Fig.), Where it is indicated: 1 - feeding conveyor, 2 - feeding conveyor, 3 - bottom with a horseshoe-shaped protrusion, 4 - rear wall.

With this design of the reloading device, a smooth movement (laminar swelling) of the rock mass from the feed conveyor to the feed takes place.

Depending on the physicomechanical properties of the material and the size of the fraction of crushed rock, estrus parameters vary over a fairly wide range. These parameters, as a rule, are selected by the calculation-experimental method.

Several options for the handling device are used at the crushing and screening plants of the enterprise OJSC Granit - Kuznechnoye. Their application can improve the quality of crushed stone overload from one conveyor to another, reduce repair time and reduce economic losses from downtime.

Claims (4)

1. A reloading device, including a feed conveyor, a feed conveyor, an inclined estrus with sides, characterized in that the estrus bottom is made at an angle to the horizon smaller than the angle of repose of the transported material. 2. The device according to claim 1, characterized in that the width of the estrus is 0.6 ... 0.8 of the width of the feed conveyor belt. 3. The device according to claim 1, characterized in that in the bottom of the estrus a horseshoe-shaped cut is made with a length and width of at least two maximum sizes of pieces of transported material. 4. The device according to claim 1 or 3, characterized in that the angle between the horizon and the line connecting the extreme point of the horseshoe-shaped cutout and the upper point of the rear wall of estrus is not less than the angle of repose of the transported material.