JP5054757B2 - Span system for combustion grate - Google Patents

Description

  The present invention relates to a span system for an incineration or combustion grate within an incineration or combustion plant. Such grate typically has a plurality of juxtaposed grate beams, at least some of which are movable to move the fuel on top of the grate.

  According to US Pat. No. 5,178,128, an incineration and combustion plant of this type has a grate partly movable in the direction of fuel transfer at the top of the grate, and further It is also known to fix in close contact between adjacent grate rods using hydraulic cylinders that are arranged along the sides of the grate and that press all the grate rods of the grate toward each other Yes. In the case of large grate, the power of this system is increased, and more play is required for possible expansion, which can lead to particles entering between the grate bars, resulting in these The side of the grate is worn out.

  U.S. Pat. No. 5,377,663 presents a span system for an incineration or combustion grate in an incineration or combustion plant, which has a plurality of juxtaposed grate beams. At least a portion of which is movable to move fuel above the grate, and further, the span system includes a plurality of spanning units disposed below the grate. each span unit to provide two engaging means, each for engaging a grate beam, and a stable force pulling these engaging means towards each other Force generating means, so that the grate beams between the two engaging means are pulled towards each other. However, this span system is limited to spanning of grate beams that move together, and therefore is not used for spanning of grate where individual grate beams move relative to each other.

  It is an object of the present invention to provide a span system that provides a stable force to keep the grate beam together in situations where the construction is simple and the temperature changes. This is achieved by the span system according to claim 1.

  In this configuration, the joint between the engagement means may be provided away from the grate beam without interfering with the grate beam, so that the relative movement of the grate beam is not restricted. It is possible to simultaneously span two grate beams. The span system may also be provided as a modular system, with each span unit spanning a small number of grate beams, for example, up to six grate beams, so these grate beams can be combined together. The force required to maintain is considerably less than the force required to maintain all the grate beams of the grate together with known hydraulic systems. The force generating means can also have the necessary clearance for possible expansion with no possibility of particles entering between the individual grate beams.

  Preferred embodiments of this span system are set forth in the dependent claims, the advantages of which will become apparent to those skilled in the art upon reading the following detailed description.

  In the following detailed description section of this specification, the present invention will be described in more detail with reference to an exemplary embodiment of a span system according to the present invention shown in the drawings.

  The combustion grate shown in the cross-sectional view of FIG. 1 extends in the direction of movement of the fuel at the top of the grate, and becomes a movable grate beam 1 ′ and a fixed grate beam 1 alternately in the lateral direction. A plurality of grate beams 1 configured as described above. The span unit 2 has two mostly vertical main bars 3, 4 provided with engaging means for engaging a fixed grate beam 1 at the upper end. A first distance bar 5 is connected between the main bars 3, 4, and the distance bar 5 is adjusted by adjusting the distance between the main bars 3, 4 at the lower ends of the two main bars 3, 4. Screws and nuts 8 are provided to enable this. At an intermediate position between the first distance bar and the engaging means, the second distance bar 6 is connected between the two main bars 3 and 4, and the second distance bar 6 and the two main bars are connected. This connection between 3 and 4 has a spring means 7 which is in the form of a disc spring which is arranged inside a tube which is connected and fixed to the main rods 3 and 4. It is preferable that As a result, the distance bar 6 acts as a pulling bar for pulling the two main bars 3, 4 towards each other, so that the engaging means connected to the fixed grate beam 1 are these The main grate beams are pulled towards each other so that the grate rods 1, 1 'between the two engagement means are kept in intimate contact along their sides. As an alternative to the spring means 7, the main rod may be made of spring steel that provides the necessary flexibility for the spanning force.

  The connection between the distance rods 5, 6 and the main rods 3, 4 allows the main rods 3, 4 to move to a certain degree, thereby loosening the nut 8 and further between the engagement means. The span unit 2 can be mounted under the grate, and as a result, these are tightened by tightening the nut 8 until a certain degree of pre-bridging of the spring means 7 is achieved. It becomes possible to engage with the fixed grate 1. Alternatively, this attachment may be facilitated by providing one distance bar in the form of two parts that are assembled after engagement with the grate beam.

  As shown in FIG. 1, the span unit 2 may be provided in different sizes as indicated by 2 ', which has the same functions and components as the span unit 2, Since shorter distance rods 5 ′ and 6 ′ are provided, the bridge spans a small number of grate rods 1. A cover plate 9 is provided on the main rods 3 and 4 to protect the screws on the distance rods 5 and 5 'from grate dust falling through the grate. It covers at least the commonly used part of the screw on 5 '. A similar cover plate (not shown) may be provided to protect the distance bar 6, 6 '.

  As shown in FIG. 2, two span units 2 are provided, one at each end of the grate beam 1 to provide a force to push the grate beam towards each other. If deemed necessary, more than two such span units may be used for each set of grate beams that are bridged together by a span system. FIG. 2 also schematically shows a movement mechanism for moving the movable grate beam, having a fixed beam 10 and a roller 11 shown only schematically, and in addition to the cooling water in the water-cooled grate. Also shown is a tube 12 for circulating.

  FIG. 3 has a main grate beam 3 and a tap 13 provided in the grate beam for engaging a hole for maintaining the main bar 3 in position relative to the grate beam. Furthermore, details of the engagement means having an engagement surface 14 for transmitting the spanning force to the grate beam are shown.

  FIG. 3 also shows the details of the joint between the distance bar 6 and the main bar 3 in the form of a tube 15, in which a disc spring disk is arranged around the distance bar 6. The hole is compressed between the nut on the distance bar 6 and the bottom plate 16 of the tube 15, and the bottom plate 16 is provided with a hole for allowing the distance bar 6 to pass therethrough.

  Although the invention has been described with reference to the specific embodiments of the invention shown in the drawings, many modifications may be envisaged by those skilled in the art without departing from the scope of the appended claims. .

1 is a cross-sectional view schematically illustrating a combustion grate provided with a span system according to a preferred embodiment of the present invention. It is sectional drawing of the longitudinal direction which shows the grate of FIG. 1 schematically. FIG. 2 schematically shows details of a span unit according to a preferred embodiment of the present invention.

Claims (8)

A spanning system for incineration or combustion grate in an incineration or combustion plant having a plurality of juxtaposed grate beams that are at least partially movable to move fuel on top,
A plurality of span units disposed under the grate, each span unit comprising:
Two engagement means, each for engaging a grate beam,
Force-generating means for supplying a stable force for pulling the engagement means towards each other so that the grate beam between the two engagement means is pulled towards each other as a result In a span system,
Each span unit
Two main bars having the engaging means at one end;
First and second distance rods connected between the main rods at different distances from the engaging means, the first distance rod being a distance between the main rods and thus the engagement rods. A span system comprising adjusting means for adjusting the distance between the connecting means, wherein the second distance bar provides a generally constant distance between the two main bars.   The engagement means comprises an engagement surface and an engagement tap for maintaining the engagement means in a fixed position relative to the engaged grate beam. Span system as described in   The engagement means engages a fixed grate beam, and at least one grate beam is disposed between the two fixed grate beams engaged by the two engagement means of each span unit. 3. A span system according to claim 1 or 2, characterized in that   4. The adjusting means according to any one of claims 1 to 3, characterized in that the adjusting means comprises a screw engaging with a nut in order to adjust the distance and / or force between the engaging means. Span system.   5. A span system according to any one of the preceding claims, characterized in that the force generating means is formed by the main bar made of spring steel.   6. The force generating means according to any one of claims 1 to 5, characterized in that it is formed by the second distance bar connected to the main bar via at least one spring. Span system.   7. A span according to any one of claims 1 to 6, characterized in that the adjustable distance bar is arranged at the end of the two main bars opposite the engagement means. system.   8. A span system according to any one of the preceding claims, characterized in that the mutual distance between the engaging means and the first distance bar and the second distance bar are approximately equal.

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