Grower bar and use of a grower bar
By arranging reinforcements below the center line of the extension surface of the furnace bar and bonding to the base body, the problem of breaking the furnace bar during its service life is solved, and the stable retention of the material on the extended surface is achieved.
Patent Information
- Application Number
- CN202411377963.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-10-04
- Filing Date
- 2024-09-30
- Publication Date
- 2025-04-08
AI Technical Summary
Existing grating strips are prone to rupture during their service life, resulting in complete rupture of the extension surface and the problem of material falling into the underlying space.
By arranging the reinforcement below the centerline of the extended surface of the grating strip and bonding it to the substrate to break before the substrate breaks, the reinforcement forms an interlocking junction of fragments, continuing to keep the broken half together.
Effectively reduce the risk of cracking of the grating strips during their service life, ensuring that the material remains on the extended surface and preventing the material from falling into the space below.
Smart Images
Figure CN119778736A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a grate bar having a base body made of a first material and a grate bar reinforcement having a material different from the first material, the base body having an extended surface having a longitudinal extent, an upper side and a lower side, and a center line between the upper side and the lower side in the longitudinal extent, the center line extending through the center of gravity of the extended surface. Background Art
[0002] This type of grate bars are used in incineration plants and in particular in waste incineration plants. They usually have an extended surface on which the material to be incinerated lies and on which further grate bars can also slide. The extended surface has an upper side and a lower side and has so much material between the upper side and the lower side that the extended surface does not wear out too quickly.
[0003] It is known to incorporate plates made of a particularly wear-resistant material into the extended surface in order to reduce wear.
[0004] Furthermore, it is known to incorporate different materials into the extended surface in order to prevent cracking of the extended surface. The material is arranged in the center of the extended surface so that it is completely encapsulated by the casting material. The center of the extended surface forms a center line extending between the upper side and the lower side of the extended surface and extending through the center of gravity of the extended surface. In order to minimize the influence of stresses due to different material expansions of the casting material and the reinforcement, it is ensured that the reinforcement is located exactly in the exact center layer between the upper side and the lower side of the extended surface.
[0005] Furthermore, the grate bars mostly have lateral flanks extending along the grate bars perpendicularly to the extension surface. These flanks can also be implemented in a reinforcing manner in order to avoid cracking of the grate bars.
[0006] However, in the end, all these measures cannot avoid the possibility of grate bar breakage during the service life of the grate. Summary of the invention
[0007] The present invention is therefore based on the object of minimizing the effects of grid cracks.
[0008] This object is achieved with a grate bar having the features of claim 1 .
[0009] The grate bars according to the invention are not made of more and more conveniently positioned and distributed cast material, but grate bar reinforcements are used. However, according to the invention, it is accepted that the grate bars may break at some point. In order to avoid that the extended surface breaks completely and material can fall into the space below it, the grate bar reinforcement is arranged below the center line and joined to the base.
[0010] This has the following consequences: the grate bars may break, because the matrix made of cast material breaks. However, this usually only leads to expansion of the reinforcement, which, due to its position, does not necessarily have to break at the same time as the cast material. Therefore, the cast material can break, and the reinforcement continues to hold at least two fragments together. Moreover, the deformation of the extension surface that occurs in the process means that the material continues to remain on the extension surface and does not fall into the space below the extension surface.
[0011] Therefore, it is further proposed that the grate bar reinforcement is joined to the base body in such a way that, in the event of rupture of the base body due to pressure on the upper side of the extension surface, the base body ruptures before the reinforcement ruptures.
[0012] In addition, after the matrix is broken, the reinforcement should form an interlocking joint of the fragments.After breaking, the reinforcement can further deform and continue to hold the broken halves together.
[0013] The grate bar reinforcement can be joined to the base body in different ways. It is advantageous if the grate bar reinforcement is joined to the base body by interlocking. That is, it can be cast in the base body or on the edge of the base body. The reinforcement can also be fastened to a cast-in bracket or flange. It can even be arranged in a displaceable manner relative to the base body in order to reduce the influence of stresses due to different thermal expansions.
[0014] The contact area between the grate bar reinforcement and the base body can be reduced, since less than 50% of the surface area of the grate bar reinforcement forms a bearing surface at the base body.
[0015] In order to reduce the consequences of a rupture on the long side of the extended surface, it is proposed that the grate bar reinforcement extends over more than 35% and preferably more than 50% of the longitudinal extent.
[0016] A simple embodiment provides that the grate bar reinforcement has one and preferably a plurality of struts extending along the longitudinal extent of the extension surface.
[0017] The reinforcements can also act as heat sinks or cooling fins. It is therefore proposed in a further optimized manner that the grate bar reinforcements have a sheet metal material.
[0018] Additionally or cumulatively, the grate bar reinforcement may be helical and / or have a plurality of rings engaging with each other.
[0019] If the grate bars are made of cast material, the grate bar reinforcements may be cast thereon.
[0020] The grate bar reinforcement should be lightweight, be able to bridge a distance and withstand forces. Therefore, it is proposed that it has through holes or holes. In this case, the punched out material can be formed by only one plane of the reinforcement.
[0021] Furthermore, the grate bar reinforcement may have a plurality of struts between the rows of holes and be designed as expanded metal.
[0022] Depending on the use case, the grate bar reinforcement may be three-dimensionally shaped or even designed as a hollow body. In the design of the grate bar reinforcement as a hollow body, the hollow body may be joined to the underside of the extension surface only on one side.
[0023] Further options for designing the grate bar reinforcement develop if the basic body has a plurality of flanks extending perpendicularly from the upper side of the extension surface to the side faces of the lower side of the extension surface, and the grate bar reinforcement is arranged between these flanks.
[0024] Use in waste incineration plants constitutes a particularly advantageous use. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Advantageous exemplary embodiments are illustrated in the drawings and are described in more detail below.
[0026] Figure 1 shows a longitudinal section through a grate bar,
[0027] Figure 2 Shown through Figure 1 The cross section of the grate bar shown,
[0028] Figure 3 Shows Figure 1 A view of the underside of the grate bars shown,
[0029] Figure 4 Shows Figure 1 A side view of the grate bars shown,
[0030] Figure 5 Shows Figure 1 A plan view of the grate bars shown,
[0031] Figure 6 Shows Figure 1 A perspective view of the underside of the grate bars is shown,
[0032] Figure 7 An enlarged view of the grate bar reinforcement is shown,
[0033] Figure 8 A perspective view showing different grate bars with screwed-on reinforcing struts, and
[0034] Fig. 9Shows Figure 8 The underside of the grate bars shown. DETAILED DESCRIPTION
[0035] exist Figures 1 to 7 The grate bar 1 shown in FIG. 1 essentially comprises a base body 2 and a grate bar reinforcement 3. The base body 2 consists of a cast material and the grate bar reinforcement 3 consists of a bent metal sheet. The base body has an extension surface 4 having an upper side 6 and a lower side 7 on a side lying opposite the upper side 6. A center line 9 extends between the upper side 6 and the lower side 7 over the longitudinal extent 5 of the extension surface 4 through a center of gravity 8 of the extension surface 4.
[0036] However, the grate bar reinforcement is not arranged exactly on the center line 9 between the upper side 6 and the lower side 7 of the extension surface 4, but below this center line and joined to the basic body 2. Figures 1 to 7 In the exemplary embodiment shown, the grate bar reinforcement 3 has a plurality of struts 10, which are positioned along the longitudinal extent of the grate bar reinforcement. Figure 8 and Fig. 9 In the exemplary embodiment shown, only one strut 13 extends between the two flanges 11 and 12 as a grate bar reinforcement 3. This strut 13 can rest on the underside of the extension surface or be arranged spaced apart from the extension surface.
[0037] exist Figures 1 to 7 In the exemplary embodiment shown in , the grate bar reinforcement 3 consists of a sheet metal material which has through holes 14 between the struts 10 and the webs 15. As a result, a plurality of rows of holes 20 are produced in the grate bar reinforcement 3.
[0038] exist Figures 1 to 7 In the exemplary embodiment shown in , the grate bar reinforcement which is three-dimensionally shaped to form the hollow body 16 is cast on the grate bar and as a result the hollow body 16 is joined to the underside 7 of the extension surface 4 only on one side 17 .
[0039] exist Figure 8 and Fig. 9 In the exemplary embodiment shown, the grate bar reinforcement 3 is likewise located between the flanks 18 and 19 extending perpendicularly to the upper side 6, wherein the grate bar reinforcement is designed as a bar or threaded rod between the two flanges 11 and 12. The use of threaded rods as struts 13 makes it possible to hold the grate bar reinforcement on the flanges 11 and 12 by means of screws 21-24.
Claims
1. A grate bar (1), comprising a base (2) and a grate bar reinforcement (3), the base (2) being made of a first material, the grate bar reinforcement (3) being of a material different from the first material, the base (2) having an extension surface (4), the extension surface having a longitudinal extent (5), an upper side (6) and a lower side (7), and a center line (9) between the upper side (6) and the lower side (7) in the longitudinal extent (5), the center line extending through a center of gravity (8) of the extension surface (4), the grate bar reinforcement (3) being arranged below the center line (9) and joined to the base (2), characterized in that The grate bar (1) is made of cast material and the grate bar reinforcement (3) is cast on the grate bar (1), or the grate bar has a support (13) which is spaced apart from the lower side (7) and is held between two flanges (11, 12).
2. The grate bar according to claim 1, characterized in that The grate bar reinforcement (3) is joined to the base body (2) in such a way that, in the event that the base body (2) ruptures due to pressure on the upper side (6) of the extension surface (4), the base body (2) ruptures before the grate bar reinforcement (3) ruptures.
3. A grate bar according to any one of the preceding claims, characterised in that After the matrix (2) breaks, the grate bar reinforcement (3) forms an interlocking joint of fragments.
4. A grate bar according to any one of the preceding claims, characterised in that Less than 50% of the outer surface area of the grate bar reinforcement (3) forms a bearing surface on the base body (2).
5. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) extends over more than 35% and preferably more than 50% of the longitudinal extent (5).
6. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) has one and preferably a plurality of struts (10) extending along the longitudinal extent (5).
7. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) comprises a metal sheet material.
8. The grate bar according to claim 7, characterized in that The sheet metal material has through holes (14) between the struts (10) and the webs (15).
9. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) is spiral-shaped.
10. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) has a plurality of rings engaged with each other.
11. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) has through holes (14) or apertures.
12. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) has webs (15) between the rows of holes (20).
13. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) is three-dimensional in shape.
14. A grate bar according to any one of the preceding claims, characterised in that The grate bar reinforcement (3) is designed as a hollow body (16).
15. The grate bar according to claim 15, characterized in that The hollow body (16) is joined to the underside (7) of the extension surface (4) only on one side (17).
16. A grate bar according to any one of the preceding claims, characterised in that The base (2) has a plurality of flanks (18, 19) extending perpendicularly to the upper side (6) of the extension surface (4) at the sides of the lower side (7) of the extension surface (4), and the grate bar reinforcement (3) is arranged between the plurality of flanks (18, 19).
17. Use of a grate bar according to any one of the preceding claims in a waste incineration plant.