RU205317U1 - FINE CLEANING GRILLE WITH PERFORATED SCREEN "ERPE" - Google Patents

Abstract

The device belongs to mechanical gratings for fine wastewater treatment, consisting of a frame, a drive shaft of a filter screen with an electric drive, a brush for cleaning a filter screen with an electric drive, a washing unit for a filter screen, roller chains with guides, a filter screen, perforated panels of a filter screen of a stepped shape with the ability turning to a position parallel to the flow on the inclined surface of the screen from the side opposite to the incoming flow, below the brush and the washing unit.

Description

The utility model refers to mechanical grids for fine wastewater treatment and can be used for wastewater treatment at water treatment facilities for municipal and industrial enterprises from mechanical impurities larger than the size of the lattice screen holes.

Known device for fine mechanical wastewater treatment ("KD43 Band Screen", manufacturer - KD Group A / S, Denmark), consisting of a frame, filtering screen, which is an endless web, recruited from metal panels L-shaped, which are fixed on two roller chains and on the surface of the screen on the side opposite to the incoming flow, turning on the axes, are installed parallel to the flow, the drive shaft of the filter screen with an electric drive, the roller chain guides in the shape of a crescent, the filter screen washing unit. The filter screen is located perpendicular to the flow at an angle to the horizon with a slope in the direction opposite to the incoming flow, the top of the screen has a horizontal section, where the panels are rotated on the axes and washed.

One of the disadvantages of the known device is the large size of the grate in the direction of flow, due to the presence of a horizontal section in the upper part of the filter screen and the rotation of the perforated panels in the direction of the flow, which in some cases does not allow the use of these gratings in old channels during the reconstruction of treatment facilities.

The objective of this utility model is to reduce the overall dimensions of the grid in the direction of flow to ensure ease of maintenance and ease of use.

The problem is solved by using perforated stepped panels, made with the ability to rotate the panels along the flow on the inclined surface of the filter screen from the side opposite to the incoming flow.

The grille is made of corrosion-resistant steel. The main part of the grate is a filter screen installed in the grating frame perpendicular to the flow at an angle to the horizon with a slope in the direction opposite to the incoming flow. The grille frame is mounted on swivel supports.

The filter screen of the grill is an endless filtering cloth consisting of stepped perforated panels with perforations on both the vertical and horizontal surfaces of the step. The panels are hinged on two plate roller chains made of corrosion-resistant steel with rollers made of wear-resistant antifriction polymer and are driven by a geared motor through a drive shaft and sprockets of the roller chain drive. In the underwater part, the chains are rolled around fixed crescent-shaped lower guides made of wear-resistant polymer. The gaps between the perforated panels and the grating frame on the oncoming flow side are bridged with belt brushes to eliminate the passage of debris past the grating screen. Moving upwards, the perforated panels remove small debris that has settled on them from the sewage channel. Larger debris is captured and removed from the channel by steps of panels.

Perforated panels from the outside are cleaned by a cylindrical polymer bristle brush rotating in the opposite direction relative to the movement of the screen, driven in rotation by a geared motor. The distance between the brush shaft and the filter screen is adjusted by turning the brush on the support plates. On the inside, the perforated panels are cleaned by flushing with water jets through flat-flare nozzles of the flushing unit, which consists of a manifold with flat-flare nozzles, connected by a flexible hose with shut-off valves. The shut-off valve is installed on a rotary support of the grating and consists of an electrovalve, a coarse filter, a mechanical tap and a fitting for connection to the water supply. The angle between the water jets and the panels is adjusted by turning the manifold with nozzles relative to the grate frame.

The brush is covered with a removable cover, the lower part of which is a slime for unloading garbage. There is a hatch in the casing for access to the brush. A rubber scraper is installed on the grating frame, which prevents the debris removed from the screen from getting back into the channel.

Perforated panels of the filtering screen on the side opposite to the incoming flow are hinged in a position parallel to the flow to reduce the size of the grate, reduce hydraulic resistance, and increase the performance of the grate in water. To reduce wear and prevent the panels from jamming by the structural elements during reversal in the places of friction of the panels on the grille frame, linings made of wear-resistant antifriction polymer are installed.

With a large width of the lattice, to ensure the rigidity of the panels from the side of the incident flow, the panels are additionally supported on a beam installed in the plane of symmetry of the lattice, covered with an anti-friction wear-resistant polymer.

Above the channel level, removable covers are installed on the frame for servicing the perforated screen panels.

On the brackets attached to the grating frame, there are sensors that measure the level of waste liquid in the channel in front of the grating and behind the grating.

The grille is equipped with a control system consisting of a control cabinet and a remote control panel. The control system allows you to control the operation of the grate in manual mode and in automatic mode - by timer or by the difference in the level of waste liquid in the channel in front of the grate and behind the grate.

The utility model is shown in the figures, where:

in fig. 1 is a side view of the claimed device;

in fig. 2 is a front view.

The inventive device consists of: a welded frame 7, swivel supports 4, a removable cover 5, sensors 6 and 8, a drive shaft 9, an asterisk 10, a collector 11 with flat nozzles 12, a rubber scraper 13, a cylindrical brush 15, a removable casing 16 with a slip for unloading garbage 14 and hatch 17, belt brushes 18 and 20, filter screen panels 19 fixed on roller chains 23, fixed lower guides 21, lining 22, beams 24, flexible hose 25 with shutoff valves. The shut-off valve consists of an electrovalve 26, a coarse filter 27, a mechanical valve 28 and a fitting 29.

The technical result of the claimed utility model is to reduce the size of the grating in the direction of flow.

Reducing the size of the grating in the direction of flow is achieved by the fact that there is no horizontal section of the screen in the grating due to the fact that the panels are rotated on the inclined surface of the screen from the side opposite to the incoming flow, below the brush and the washing unit.

The declared design of the utility model allows, by reducing the dimensions, to use the grating in channels of various sizes, including in old channels during the reconstruction of treatment facilities.

Claims (1)

A grate for fine mechanical wastewater treatment, consisting of a frame, an electrically driven filter screen drive shaft, an electric filter screen cleaning brush, a filter screen washing unit, two roller chains, two crescent-shaped roller guide chains, a filter screen located perpendicular to the flow under angle to the horizon with a slope to the side opposite to the incoming flow and representing an endless web made of metal perforated panels, characterized in that the perforated panels of the filtering screen have a stepped shape, made with the possibility of turning to a position parallel to the flow on the inclined surface of the screen from the side, opposite to the incoming flow, below the brush and the flushing unit.

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