Suspended steam boiler

Abstract

Suspended steam boiler, in which the steam boiler lower portion (5), having inclined tubes, is suspended from the steam boiler upper portion (1), having vertical tubes exclusively from the vertical tubes of the latter without additional external tensile or support elements.

Description

FIG. 1 of the drawings represents a steam boiler according to the invention in diagrammatic perspective view,

FIG. 2 shows a detail of the steam boiler at the transition between the vertical tube wall (2) of the steam boiler upper portion (1) and the inclined tube wall (6) of the steam boiler lower portion (5), including an interconnected manifold system (3),

FIG. 3 represents a detail of FIG. 2 at the level of the coupling strip 10 but without the manifold system, and

FIG. 4 represents a working example of one of the welded coupling form plates 18, of which the coupling strip 10 according to FIG. 3 is assembled.

Claims

1. A suspended steam boiler including a steam boiler upper portion (1), having a vertical tube wall (2) composed of vertical tubes (3) with vertical webs (4) formed there between and a steam boiler lower portion (5) suspended from the vertical tube wall including an inclined tube wall (6) composed of inclined tubes (7) and inclined webs (8) formed there between, the inclined tubes having upper terminal regions (9), terminating in horizontally mutually staggered relationship at the upper edge of the inclined tube wall and a coupling strip (10) being formed along the upper edge of the inclined tube wall, having a plurality of vertical tube bends (11) including connecting limbs (12) projecting from the coupling strip and vertical limbs (13) formed into the coupling strip, and being welded to the vertical tubes (3), and having a plurality of inclined tube bends (14) having connecting limbs (12) projecting from the coupling strip and inclined limbs (15) formed into the coupling strip, welded to the terminal regions (9) of the inclined tubes, the coupling strip (10) being welded to the inclined tube wall (6) below the inclined limbs of the inclined tube bends along the inclined limbs (15) and above the terminal regions of the inclined tubes along the terminal regions (9) and the suspension of the steam boiler lower portion (5) from the vertical tube wall (2) is brought about by welding of the coupling strip (10) to the inclined tube wall and by the welding of the vertical limbs (13) of the vertical tube bends of the coupling strip to the vertical tubes (3) of the vertical tube wall, without the steam boiler lower portion being supported on or from additional external tensile or support elements.

2. Steam boiler according to claim 1, wherein the number of vertical tubes of the vertical wall exceeds the number of inclined tubes (7) of the inclined tube wall (6), such that the coupling strip (10) and accordingly also the inclined tube wall is suspended from the vertical wall by groups of pluralities of vertical tube bends (11-1 to 11-4) per inclined tube (7).

3. Steam boiler according to claim 2, wherein the coupling strip is assembled from a plurality of coupling form plates (16) welded together, of which each includes at least one of the groups of a plurality vertical tube bends (11-1 to 11-4) and one inclined tube bend (14) per group.

4. Steam boiler according to claim 3, wherein the form plates (16) comprise two or five vertical tube bends (11) per group.

5. Steam boiler according to claim 3, wherein the connecting limb (12) of the inclined tube bend (14) and the connecting limb (12) of one of the vertical tube bends (11-1) are arranged above one another along the one side edge of the periphery of the form plate (16) and the length of the vertical limbs (13) of the remaining vertical tube bends (11-2 to 11-4) of the group progressively increases as the distance from the one side edge increases, such that the connecting limbs (12) of the group are arranged in a row parallel to the inclined limb (15) of the inclined tube bend.