CN112368514A - Grate bar - Google Patents

Abstract

The invention relates to a solid fuel combustion device. The technical result is to improve the durability and reduce the material consumption. The grate comprises an inner cylinder, an outer cylindrical grate coaxial with the inner cylinder and radial ribs positioned between the inner cylinder and the outer cylindrical grate, wherein the radial ribs and the outer cylinder of the grate are formed by radially arranged integral thin plates connected with the outer surface of the cylinder of the inner cylinder.

Description

Grate bar

Technical Field

The utility model relates to a solid fuel combustion device and can be used to among the thermal engineering.

Background

Grate rolls (SU 1198326) are known, which comprise end support plates to which grates are fixed, said grates being made as grooved beams which are mounted along the rolls and which each have ribs on both sides, which ribs are located at different heights, said ribs forming a grate-like passage for ventilation with the same ribs of the adjacent grate.

The disadvantage of this device is that the strength of the heat-resistant beam is low, resulting in a low strength of the device.

The closest technical solution to the present invention is a water boiler (RU m 106723) comprising a grate comprising an inner cylinder, an outer cylindrical grate coaxial with the inner cylinder and sector-shaped spaced radial ribs between the inner and outer cylindrical grates.

The strength of the apparatus is increased due to the support of the radial ribs on the inner cylinder.

This device has the disadvantage of low durability due to overheating of the elements in contact with the fire and to uneven thermal expansion of the elements located inside the combustion field, which in turn leads to uneven stresses inside the structure. Low durability increases material consumption. Another disadvantage is poor process performance.

Disclosure of Invention

The technical result of the utility model is that the durability is improved to reduce material consumption, improved the processing property.

To achieve this object, a grate is provided comprising an inner cylinder, an outer cylindrical grate coaxial with the inner cylinder and radial ribs between the inner and outer cylindrical grate, said grate being characterized in that the radial ribs and the outer cylinder of the grate are constituted by radially aligned integral sheets connected to the outer surface of the cylinder of the inner cylinder. Description of the embodiments

Each sheet may be cast and have a base and ribs with two toothed baffles on either side of the ribs, the inner and outer surfaces of the baffles together forming a cylindrical grate according to the drawing, with a tortuous gap between adjacent baffle edges for supplying oxidant to the combustion zone.

The sheets may be attached to the outer surface of the inner cylinder by welded mounts, which are more heat resistant.

There may be a hole in the centre of the web of sheets, which hole is connected with a fastening thread coaxial with the inner cylinder, which further increases the reliability of the fixation of the sheets.

The ribs of the sheet may have non-penetrating radial recesses (grooves) and, on the outer surface of the sheet constituting the outer grate, a longitudinal projection (protuberance) oriented along the axis of the inner cylinder. The presence of the recesses will increase the ratio of the bending strength to the thermal conductivity of the ribs. The longitudinal projections on the grate better retain the fuel.

Drawings

FIG. 1 is a cross-sectional view of a grate;

FIG. 2 is a partial longitudinal cross-sectional view of the grate;

FIG. 3 is a perspective view of a sheet; wherein

1: an inner cylindrical body;

2: a support disc for the inner cylinder;

3: an outer cylindrical grate;

4: a base of the sheet;

5: a sheet rib;

6: a toothed baffle;

7: a hole in the center of the sheet rib;

8: fastening the wire;

9: a recess;

10: a protrusion;

11: an inner cylinder and a grate shaft.

Detailed Description

Description of the embodiments

The operation of the device is as follows: the inner cylinder consists of an inner cylindrical body 1 to which is attached an inner cylindrical support disc 2. The base 4 of the thin plate consisting of ribs 5 and toothed baffles 6 is welded to the outer surface of the inner cylindrical cylinder 1. The plane of symmetry of each rib passes through the axis of the inner cylinder and is also the axis of the outer grate cylinder. At the centre of the lamella ribs there is a circular hole 7 for a fixing wire 8, which is arranged coaxially and is welded to the lamella in some places by means of spacers. The recesses 9 are arranged radially along the ribs. On the outer surface of the sheet, between the toothed baffles, a longitudinal projection 10 is provided parallel to the plane of the sheet rib 5 and to the axis of the inner cylinder and to the axis of the outer cylindrical grate.

The spaces between the ribs of the sheet form a channel into which air is supplied through the zigzag-shaped gaps between the toothed baffles of the sheet for burning the fuel arranged in the grate.

The technical result is as follows: the integral baffle with ribs can better dissipate heat due to direct contact with fire, and material consumption is reduced, so that the durability is improved. The absence of elements inside the combustion field also contributes to increased durability. The integral manufacture of the sheet from a homogeneous material reduces the non-uniformity of the thermal expansion of the grate.

INDUSTRIAL APPLICABILITY

The applied design and solution can be used for the manufacture of grates, mainly for the manufacture of furnaces with continuous circulation of fuel.

Claims (5)

1. A grate comprising an inner cylinder, an outer cylindrical grate coaxial with the inner cylinder and radial ribs between the inner and outer cylindrical grate, said grate being characterized in that,

the radial ribs and the outer cylinder of the grate are formed by radially arranged integral sheets connected with the outer surface of the cylinder of the inner cylinder.

2. The grate of claim 1,

each sheet is a casting and has a base and a rib with two toothed baffles on either side of the rib.

3. The grate of claim 2,

the sheet is attached to the outer surface of the inner cylinder by a welded mount.

4. The grate of claim 1,

there is a hole connected by a fastening line in the center of the thin plate rib.

5. The grate of claim 1,

the ribs of the sheet have non-penetrating radial recesses and are provided with longitudinal projections on the outer surface of the sheet.

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