JP2001289426A - A plurality of lines of liquid-cooled central beam material element for fire grate and central beam material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve appropriate emergency operation characteristics by solving the drawback of a conventional technique in a plurality of lines of liquid-cooled central beam material element for fire grate. SOLUTION: A central beam material element (15) comprises an inner member (1) and an outer member (2) that are positioned up and down, are connected each other, and have their lower part opened, and the members form at least one pipeline (a, b) where a refrigerant is circulated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid-cooled central girder element and a liquid-cooled central girder according to the preamble of claim 1. The present invention is applicable wherever there are multiple rows of combustion grate with central girder and where means of reducing grit wear, failure and repair time increase the operating cost of the device.

[0002]

2. Description of the Related Art When a plurality of combustion gratings are used, it is sometimes necessary to provide a side separation portion for each of the adjacent gratings. This separation allows different ways of operating adjacent grids when the grid system to which they are applied is mechanically and pneumatically decoupled. For this purpose, components are used which are fixedly connected to the lower structure of the combustion furnace and which reach the combustion chamber. As long as two or more grids are arranged next to each other, these components also have the problem of accepting length changes over the grid width due to temperature changes.

[0003] The components applied to the grid separation receive high heat and are subject to mechanical abrasion due to wear depending on whether additional wear-resistant elements are used on the sides of the movable grid bars or girder bars. Also receive.

[0004] The problem of wear in the applied components is addressed according to presently known techniques, by using air-cooled valuable casting materials or by liquid-cooled welded steel structures.

[0005] However, in the case of air-cooled casting elements, the cooling of the air is often no longer sufficient, since the heat content of the combustion material increases. Furthermore, the introduction of the original air cooling,
The presence of known component leakage locations at the grid edges is undesirable.

[0006] Liquid-cooled welded steel constructions have the disadvantage of lacking emergency operating characteristics, so that when the cooling system is damaged and the heat release is interrupted for a short period of time, there is significant deformation or breakage of the components.

[0007]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to overcome the disadvantages of the prior art and to develop a central girder element and a central girder for a plurality of combustion grids, in which case a good emergency operation is achieved. It is to have a characteristic.

[0008]

According to the present invention, there is provided an electronic apparatus comprising:
And a center girder material element having a configuration characterized by the above-mentioned features.
A central girder having the configuration according to 5 solves this.

[0009] Advantageous configurations of the invention are set forth in the dependent claims.

The solution according to the invention is characterized in that a plurality of liquid-cooled central girder elements for the combustion grate are positioned one above the other, connected to one another and open below. Components, which form at least one conduit through which the coolant flows, and which are joined completely and parallel to the outer surface subjected to the thermal load.

[0010] Advantageously, the upper and lower members are formed in the shape of a hanging bell. The conduits are located on both sides of the inner member. This places a rib dividing the space above the inner member, which prevents fluid from passing from one side of the space into the other.

Furthermore, it is advantageous to arrange another rib between the inner member and the outer member. This can be, for example, two ribs on each side along the central girder element, wherein the inner part is advantageously produced by casting, so that the cast ribs are arranged on the inner part. . This forms several lines, one above the other, which are joined to the outer surface which is subjected to the thermal load and which are completely joined to one another, in which the coolant flows from one side of the central girder element to the other side. be able to.
Advantageously, the inlet is arranged on one side of the central girder element and the outlet is provided on the other side of the central girder element. At this time, the cooling medium can flow into the central girder element on one side of the central girder element and is then pushed at the other end of the central girder element into the chamber above it, On both sides of the member, it flows back to the other side, where the coolant is pushed together from both sides and pushed into the next chamber above it, where it splits again and flows to the other side, where 1 Flows down the two lines to the outlet. The inner member is advantageously made of cast iron having good emergency operating characteristics. In order to ensure an advantageous fixing, the inner part can have transverse ribs for the holding plate.

The outer member, which is fixedly connected to the inner member in a leak-proof manner, can be provided with a cam for the grid covering. The outer member is advantageously made by casting.
It is advantageous to arrange uncooled anti-friction material on both sides of the outer member. This wear-resistant plate material can be welded,
In addition, it is possible to ensure that the wall portion of the outer member is not damaged by the abrasion. Thereby a long service life is guaranteed.

It is furthermore advantageous for the outer member to be arranged on the inner member such that the outlet side communicates with the highest point of the central girder element through which it flows. As the cooling medium, water or other high-boiling coolant can be used.

Several liquid-cooled central girder elements located before and after can be assembled into one liquid-cooled central girder material.
In that case, it is advantageous to arrange the center beam elements in a series connection.

[0015] Similarly, when it is considered to be advantageous for the cooling system, a parallel connection is also conceivable. The inner member and the outer member are individually manufactured and assembled by, for example, casting a steel casting.

The solution according to the invention has the advantage of overcoming the disadvantages of the prior art and developing a central girder element and a central girder with good emergency operating characteristics during liquid cooling. By implementing in the form of combining cast members, the center girder element can be manufactured at low cost and with high reliability.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the solution according to the invention is explained in more detail by means of two figures and one embodiment.

The center girder shown in FIG.
The center girder elements are arranged back and forth according to the length of the center girder, and are connected in series in this embodiment. 1
The two center girder members 15 are composed of two hollow bodies which are vertically hung from each other in a hanging bell shape and open on one side, of which the inner member 1 and the outer member 2 are distinguished. The two parts made by casting are individually cast and then combined. A rib 3 is arranged on the outer surface of the inner member 1 and forms a boundary of the cooling pipes (a, b) after the outer member 2 is covered thereon, and a total hollow space for receiving the coolant. To guarantee the seal. The ribs 3 of the inner member 1 are arranged as follows. That is, at the rear of the inlet 4, the conduits (a, b) are split on both sides of the inner member 1 and are rejoined, starting at the outlet side 5, again split again at another second face and the inlet side And they will be together again. From there, the flow is again reversed and the top surface is led to the outlet side 5, where it flows into the outlet pipe 7 as a single stream. The outflow pipe 7 is passed to the uppermost position of the hollow space for entrainment of air bubbles, and passes through the surface of the rib 3 that is located below and guides the coolant on the way to the outlet 8 that is located below. I have. To receive the holding plate 9, the inner member 1 has a transverse rib 10 with a cast hole. The width of the retaining plate 9 is adapted to the inner contour of the inner member 1, so that the retaining plate 9 can receive in a form-constraining manner the shear forces acting on the central girder element 15 outward. Has become. If several central beam elements 15 are connected in series, it is advantageous to allow the coolant to flow sequentially from one central beam element to the next, as shown in FIG.

As shown in FIG. 2, it is possible to attach an uncooled anti-friction plate 11 to the outer member 2 between the grid coating 12 and the center girder element 15, in which case the center girder element 15 of FIG. Has a cam body 13. Wear-resistant plate material 1
1 is mounted on this cam body and is fixed to the center girder element 15 by short welding seams 14.

[Brief description of the drawings]

FIG. 1 is a line BB of FIG. 2 of a liquid-cooled central girder according to the invention;
FIG.

2 is a cross-sectional view of the center girder element according to the invention, taken along line AA in FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 inner member 2 outer member 3 rib 9 holding plate 10 lateral rib 11 wear-resistant plate 12 grid coating 13 cam 15 central girder material element a, b conduit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Rainer Fratz DE 97225 Celingen Eichenstrasse 7

Claims (15)

[Claims] 1. In a plurality of liquid-cooled central girder elements for a combustion grid comprising a liquid conduit, a coolant supply part and a discharge part, central girder elements (15) are positioned one above the other, Two members that are joined and open at the bottom (1,
2), wherein the members form at least one conduit (a, b) through which the coolant flows. 2. The center girder element according to claim 1, wherein the upper and lower members (1 and 2) are formed in a hanging bell shape. 3. The conduit (a, b) is formed on both sides of the inner member (1) and is joined completely and parallel to the outer surface subjected to the thermal load. The center girder element according to 1 or 2. 4. A plurality of conduits (a, b) arranged vertically on each side of the inner member (1), and these conduits are joined to the outer surface subjected to a thermal load entirely and in parallel. Central girder element according to one of claims 1 to 3, characterized in that: 5. Center girder element according to claim 1, wherein a rib (3) is arranged on the inner member (1) in the direction of the outer member (2). . 6. The center girder according to claim 1, wherein a lateral rib (10) for the holding plate (9) is arranged inside the inner member (1). element. 7. The center girder element according to claim 1, wherein at least one uncooled wear-resistant plate (11) is arranged on the outer part (2). 8. An outer member (2) to which an uncooled wear-resistant plate (11) is joined on both sides and which is fixed by welding seams. Central girder element. 9. The method as claimed in claim 1, wherein the outer member comprises a cam body between the grid covering and the central girder element. The center girder material element described in one. 10. The center girder element according to claim 1, wherein the center girder element is a cast body. 11. The center girder element according to claim 1, wherein the inlet (4) is arranged opposite the outlet side (5). 12. An outlet side (5) leading from the highest point of the central girder element (15) through which it flows.
12. Center girder element according to one of claims 1 to 11. 13. Center girder element according to one of claims 1 to 12, characterized in that there are at least three conduit (a, b) planes inside the center girder element (15). . 14. A plurality of liquid-cooled center girder members for a combustion grid, comprising a plurality of front and rear center girder members (15) according to claim 1 to 13.
(5) The center girder material, wherein (5) is a serial connection. 15. A plurality of liquid-cooled central girder members for a combustion grating, comprising a plurality of central girder member members (15) located adjacent to each other according to claim 1, wherein the central girder member (1) is provided.
(5) The center girder material, characterized in that it is connected in parallel.