SU1484976A1 - Aspiration shelter of conveyer - Google Patents

Description

The invention relates to the mining industry. The goal is to prevent the pollution of atmospheric air by dust and harmful gases due to a uniform sectional removal of fine dust and gas. Aspiration shelter includes mounted on the frame of the conveyor (K) 1 section (C).

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Each C has an upper 3 and side 2 walls and an air-permeable partition (P) between the latter. The latter is made in the form of corners 6 installed on the rods, oriented with their tops upwards and having elastic shelves. The cavity of each C is divided into the upper and lower zones. The upper wall 3 of each C has pairwise placed nozzles 8 and 9, one of which communicates with the gas duct 14 the upper zone, and the other - the lower zone. The nozzle 8 has a valve 10 at the end for discharging dust to K 1. To allow inspection, K 1 during operation C is mounted for movement using a lifting mechanism. When this pipe 8 and 9 are connected to the flue 14 flexible hoses. When transporting bulk material through K 1 in the duct 14, a vacuum is created and dust and gases are sucked from the transportation zone in front of P. Through pipe 8 and valve 10, the precipitated dust is returned to K 1. 4 sludge.

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The invention relates to the mining industry and can be used to reduce dust formation and prevent the accumulation and explosions of gases during transportation of dry bulk material by conveyors.

The purpose of the invention is to reduce air pollution by dust and harmful gases due to the uniform sectional removal of fine dust and gases.

FIG. 1 shows the aspiration cover of the conveyor, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. 2; in fig. 4 shows a section BB in FIG. 3

The aspiration shelter is located above the conveyor 1 and consists of 1 floor sections installed on the conveyor frame with side 2 and top 3 walls. The side walls 2 are interconnected by a horizontal air-permeable longitudinal partition consisting of strips 4 and resting on the rods of 5 rows of corners 6 with elastic shelves 7, oriented vertices upwards. In the upper wall 3 of the ceiling there are paired holes, one of which is equipped with a short discharge pipe 8 with an open end over the air-permeable partition in the vacuum zone, and the second one is equipped with an elongated discharge pipe 9 with an end fitted with a valve 10 for discharging dust and placed under the partition.

In this case, the air-permeable partition divides the cavity of the conveyor section into upper and lower zones. The partition design provides a change in its aerodynamic drag depending on the degree of vacuum in the specified upper zone. One of the possible options for sealing the joints of the side walls 2 overlap with the conveyor 1 can be made by contact of the side wall 2 sagging under its own weight, made for example of a strip of rubber or other lightweight material resistant to abrasion, with the side edge of the conveyor. Between the side walls 2 of the ceiling and the conveyor 1, longitudinal slits can also be formed through which a stream of outside air is sucked inside the shelter section, preventing dust from escaping from the shelter to the outside. The nozzles 8 and 9 of the wall 3 through flexible sleeves 11 are connected respectively with the nozzles 12 and 13 located above the sections of the duct 14. The upper walls of the 3 sections of the ceiling are equipped with loops 15, which are connected to the ends of the cables 16 passing through the blocks 17 suspended above. Other ends of the cables 16 are connected to a lifting mechanism.

Aspiration shelter works as follows.

When transporting bulk material by conveyor 1, contamination occurs.

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air dust and harmful gases. Placing over the conveyor shelter, consisting of sections with side walls 2 and rigidly connected with the upper wall 3, allows you to separate the space with the bulk material, from which dust and gases from the surrounding atmospheric air. When creating an inducer thrust (not shown) vacuum in the duct 14, located above the conveyor, there is a suction of dirt from the space enclosed by each shelter section through short pipes 8 passing through holes in the upper wall 3 of the floor section, flexible hoses 11 and pipes 12 in the gas pipe 14 .

Placed between the side walls 2 permeable with air resistance partition, consisting of strips 4 and rods 5 with elastic corners 6, allows you to distribute the sucked air evenly across the section of the section above the conveyor belt and thereby achieve uniform suction of external air through the leakiness between the side walls 2 and conveyor 1 along the entire perimeter of the overlapping section, which allows you to create optimal volumes of exhaust air and eliminate the emission of dust and gases from the shelter.

Since the partition, permeable to air resistance, consisting of rods 5 with angles 6 installed with elastic shelves, is oriented with the tips upwards, under the action of the weight of the dust deposited on the shelves, they fall and the dust from them falls on the conveyor belt. In addition, elastic shelves 6 allow you to adjust the speed of air above the conveyor, preventing the blown material being transported. For example, when the vacuum in the flue 14 rises, causing an increase in the volume of sucked air, the shelves of the 7 corners open and the air travels through the permeable partition, which decreases or even completely stops. Thanks to this construction of the partition, the dust that has settled on the shelves of the corners by shaking or by hanging the shelves of the corners is self-cleaning of the settled dust. The prevention of accumulation of dust on the partition is ensured by the execution of the partition of the sections from the corners turned up with the edges with elastic shelves. These elastic shelves can be made of rubber or from another material, they can be spring-loaded, that is, the design and material of the shelves can be different, but the main feature of the shelves is the change in the slope of the shelves under the influence of the weight of dust.

From the height of the fall, the dispersed composition

and the mass of the material entering the conveyor belt, as well as the speed of the belt movement depend on the excess pressure in

shelter and fan performance 1484976

ditch sucking dusty air from shelter. Therefore, with an increase in the volume of air drawn from the shelter, the suction rate also increases. This can lead to the capture and removal from the shelter of large particles of material and, thereby, lead to loss of raw materials.

Due to the adopted design, the dusty air is sucked between the shelves evenly over the entire cross section of the partition. Moreover, the greater the aerodynamic drag coefficient will be the partition, the more uniform the air passing through it will be distributed over the whole area.

When moving the dusty air inside the duct 14, there is a partial deposition of dust on its inner surface. Removed from the duct 14, the dust when cleaning enters the pipe 13, and then through the flexible sleeve 11 into the elongated pipe 9, the end of which is placed under the partition above the conveyor and closed by a valve 10. Under. the weight of the precipitated dust accumulated in the pipe 9, the valve 10 is opened and a portion of the dust is poured onto the conveyor. Cleaning the inner surface of the flue from dust deposits is carried out by known methods, for example by pulling a scraper 14 inside the flue. If necessary, provide access to the conveyor to inspect it in the work of the overlap section can be lifted using cables 16, thrown over the blocks 17, one free end of which is connected with loops 15, which are provided with the upper wall 3 of the floor section, and the other end of the cables is connected to the lifting mechanism.

The invention provides reliable sealing of the conveyor due to the uniform sectional removal of polluted air from the conveyor space, improves the sanitary and hygienic state of the environment, and eliminates the possibility of accumulation of explosive gas concentrations under the shelter.

Claims (1)

Claim Aspiration shelter of the conveyor, including mounted on the conveyor frame with the possibility of moving overlapping sections with the upper and side walls relative to it, characterized in that, in order to reduce the pollution of atmospheric air by dust and harmful gases due to the uniform section removal of fine dust and gases, it is provided with over the overlap sections of the flue with pipes and flexible sleeves, and each section of the ceiling is equipped with two outlet pipes attached to the top wall and the size horizontally between its side walls is a longitudinal partition with a hole made in the form of corners with elastic shelves installed on the rods, placed vertices to the top wall, with the outlet pipes of each floor section being connected in pairs with the duct through one of the ends to the duct, the cavity of the overlapping sections, with one nozzle connected to the cavity located above the partition, and the other through the hole to the cavity located under the partition, and provided with a valve for unloading zki dust from the flue. 1484976 • e-A *. \ y A ". · 777777777777777777777777 FIG. 2 FIG. C