Grate bar structure for a sintering machine

Abstract

The utility model provides a grate bar structure of sintering machine relates to sintering machine technical field, include: grate bar body and grate bar mould, the grate bar body is casted in the groove of grate bar mould, the grate bar body is provided with grate bar head, grate bar connecting portion and grate bar tail, the lower end of grate bar head is connected through the transition connection of grate bar connecting portion grate bar tail, the side of grate bar tail is provided with the lug, the lug surface inserts and has the first elastic pressing plate, the other end of first elastic pressing plate is connected with second elastic pressing plate through the elastic part. The utility model solves the problem that the driving structure of in -through connection at the head of grate bar in the prior art can reduce the overall strength of grate bar, influence grate bar service life.

Description

Technical Field

[0001] This utility model relates to the field of sintering machine technology, specifically to a grate structure for a sintering machine. Background Technology

[0002] The sintering machine is a crucial piece of equipment in the steel production process. Its performance directly determines the stability of the sinter quality. During sintering, the sintering material, after being blended, is distributed onto the sintering machine trolley via a feeding system to begin sintering. Uniform permeability of the material surface is required. As a consumable component in the sintering process, the sintering machine is used in large quantities in harsh environments. Abnormal failure of the grate bars severely restricts the stable and smooth operation of sintering and limits the performance of the furnace charge in blast furnace smelting. A search revealed existing technology (Publication No.: CN202220532780.4) that includes an automatic cleaning sintering machine... The text describes the structure of the grate bars in the sintering machine, stating that "by using a drive structure that runs through the inside of the grate bars, the grate bars can rotate automatically after use, thereby automatically cleaning impurities between the grate bar gaps and reducing damage to the grate bars from impurities. At the same time, a surface protection device is installed on the surface of the grate bars, which facilitates the cleaning of impurities on the grate bar surface and effectively reduces corrosion, thereby improving the service life of the sintering machine. Therefore, this device is suitable for widespread application." However, the existing technology has a problem where the drive structure that runs through the head of the grate bars can easily reduce the overall strength of the grate bars and affect their service life. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a grate structure for a sintering machine is provided to solve the problem that the drive structure with through-connection at the head of the grate in existing technologies easily reduces the overall strength of the grate and affects its service life.

[0004] To achieve the above objectives, a grate structure for a sintering machine is provided, comprising: a grate body and a grate mold, wherein the grate body is cast within a groove in the grate mold. The grate bar body is provided with a grate bar head, a grate bar connecting part and a grate bar tail. The lower end of the grate bar head is connected to the grate bar tail through the grate bar connecting part. A protrusion is provided on the side of the grate bar tail. A first elastic pressure plate is inserted into the surface of the protrusion. The other end of the first elastic pressure plate is connected to a second elastic pressure plate through an elastic element.

[0005] Furthermore, the grate bar body is wide at the head and narrow at the tail, and the surface of the grate bar head is provided with cylindrical micro-protrusions.

[0006] Furthermore, the side of the grate bar connecting part is an arc-shaped protrusion that connects with the tail of the grate bar.

[0007] Furthermore, the first and second elastic pressure plates have slots on their sides, and protrusions are inserted into the slots.

[0008] Furthermore, the first elastic pressure plate and the second elastic pressure plate are respectively inserted and supported at the grate bar tail spacing of adjacent grate bar bodies.

[0009] Furthermore, a protective sleeve is connected to the outer side of the elastic element.

[0010] Furthermore, the first elastic pressure plate and the second elastic pressure plate are symmetrically inserted at the openings at both ends of the protective sleeve.

[0011] The beneficial effects of this utility model are as follows: the grate structure of the sintering machine of this utility model utilizes a first elastic pressure plate, a second elastic pressure plate, and an elastic element to form an elastic support structure. The elastic pressure plates support the tail ends of two adjacent grate bars, providing continuous elastic pressure to the grate bars, effectively buffering the mechanical stress generated by the thermal expansion and contraction of the grate bars, facilitating the provision of space for thermal expansion and contraction of the grate bars, avoiding rigid compression and pulling between adjacent components, and maintaining the stability of the grate bar gap within the sintering machine; the arc-shaped grate bar connecting part connects the upper wide head and the lower narrow tail, facilitating the smooth distribution of stress, reducing fatigue fracture of the grate bars, enhancing the overall strength of the grate bars, and extending the service life of the sintering machine grate bars. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of the grate structure of the sintering machine according to an embodiment of the present invention.

[0013] Figure 2 This is a side view of the grate structure of the sintering machine according to an embodiment of the present invention.

[0014] Figure 3 This is a cross-sectional structural diagram of the elastic pressure plate according to an embodiment of the present invention.

[0015] Figure 4 This is a top view cross-sectional structural diagram of the elastic pressure plate according to an embodiment of the present invention.

[0016] In the figure: 1. Grate bar body; 11. Grate bar mold; 2. Grate bar head; 3. Grate bar connecting part; 4. Grate bar tail; 41. Protrusion; 5. First elastic pressure plate; 51. Second elastic pressure plate; 52. Protective sleeve; 53. Elastic element; 54. Slot. Detailed Implementation

[0017] Reference Figures 1 to 4 As shown, this utility model provides a grate structure for a sintering machine, including: a grate body 1 and a grate mold 11, wherein the grate body 1 is cast in a groove in the grate mold 11. The grate bar body 1 is provided with a grate bar head 2, a grate bar connecting part 3 and a grate bar tail 4. The lower end of the grate bar head 2 is connected to the grate bar tail 4 through the grate bar connecting part 3. A protrusion 41 is provided on the side of the grate bar tail 4. A first elastic pressure plate 5 is inserted into the surface of the protrusion 41. The other end of the first elastic pressure plate 5 is connected to a second elastic pressure plate 51 through an elastic element 53.

[0018] The grate bar body 1 is supported at the tail 4 of the adjacent grate bars by the first elastic pressure plate 5 and the second elastic pressure plate 51, which provides continuous elastic pressure to the grate bar body 1, effectively buffering the mechanical stress generated by the thermal expansion and contraction of the grate bars, facilitating the provision of space for the thermal expansion and contraction of the grate bars, avoiding rigid compression and pulling between adjacent components, and maintaining the stability of the grate bar gap in the sintering machine; the arc-shaped grate bar connecting part 3 connects the upper wide grate bar head 2 and the lower narrow grate bar tail 4, which facilitates the smooth distribution of stress, reduces the fatigue fracture of the grate bars, enhances the overall strength of the grate bars, and extends the service life of the sintering machine grate bars.

[0019] In this embodiment, the grate bar body 1 is wide at the head and narrow at the tail, and the surface of the grate bar head 2 is provided with cylindrical micro-protrusions. The grate bar connecting part 3 has an arc-shaped protrusion on its side that connects with the grate bar tail 4.

[0020] As a preferred implementation, the thickened design of the grate body 1 with a slightly wider head provides wear allowance, ensuring that the overall shape of the grate body 1 is maintained even after wear at the head during long-term use. The cylindrical micro-protrusions provide small expansion gaps when heated, preventing the grate body 1 from jamming due to thermal expansion. The arc-shaped protrusions of the grate connection 3 facilitate stress dispersion, preventing easy breakage of the grate connection 3. The grate body 1 is cast using ultra-high chromium cast iron, increasing the chromium content and forming a more continuous and dense Cr2O3 protective film, significantly enhancing the oxidation and corrosion resistance of the grate body 1.

[0021] In this embodiment, the first elastic pressure plate 5 and the second elastic pressure plate 51 have slots 54 on their sides, and protrusions 41 are inserted into the slots 54. The first elastic pressure plate 5 and the second elastic pressure plate 51 are respectively inserted and supported at the spacing between the grate ends 4 of adjacent grate body 1. The outer side of the elastic element 53 is sleeved with a protective sleeve 52. The first elastic pressure plate 5 and the second elastic pressure plate 51 are symmetrically inserted at the two ends of the protective sleeve 52.

[0022] As a preferred embodiment, the first elastic pressure plate 5, the second elastic pressure plate 51, and the elastic element 53 constitute an elastic support structure (the overall size can be determined according to the actual installation spacing of the grate bars in the sintering machine), so that the spacing between adjacent grate bar bodies 1 forms an elastic space, thereby buffering the mechanical stress generated by the thermal expansion and contraction of the grate bars, avoiding rigid compression and pulling between adjacent components, and maintaining the stability of the grate bar gap in the sintering machine.

[0023] The grate structure of this utility model for a sintering machine effectively solves the problem in the prior art where the drive structure with through-connection at the head of the grate bar easily reduces the overall strength of the grate bar and affects its service life. It effectively buffers the mechanical stress generated by the thermal expansion and contraction of the grate bar, facilitates the provision of space for thermal expansion and contraction, avoids rigid compression and pulling between the grate bar and adjacent components, and maintains the stability of the grate bar gap in the sintering machine. It also facilitates the smooth dispersion of stress, reduces fatigue fracture of the grate bar, enhances the overall strength of the grate bar, and extends the service life of the sintering machine grate bar. It is suitable for grate bar structures in sintering machines.

Claims

1. A grate structure for a sintering machine, comprising: The furnace grate body (1) and the furnace grate mold (11), wherein the furnace grate mold (11) is cast with the furnace grate body (1) in a groove, characterized in that: The grate bar body (1) is provided with a grate bar head (2), a grate bar connecting part (3) and a grate bar tail (4). The lower end of the grate bar head (2) is connected to the grate bar tail (4) through the grate bar connecting part (3). The grate bar tail (4) is provided with a protrusion (41) on its side. A first elastic pressure plate (5) is inserted into the surface of the protrusion (41). The other end of the first elastic pressure plate (5) is connected to a second elastic pressure plate (51) through an elastic element (53).

2. The grate structure of a sintering machine according to claim 1, characterized in that, The grate bar body (1) is wide at the head and narrow at the tail, and the surface of the grate bar head (2) is provided with cylindrical micro-protrusions.

3. The grate structure of a sintering machine according to claim 1, characterized in that, The grate bar connecting part (3) has an arc-shaped protrusion on the side that connects to the tail part (4) of the grate bar.

4. The grate structure of a sintering machine according to claim 1, characterized in that, The first elastic pressure plate (5) and the second elastic pressure plate (51) have slots (54) on their sides, and protrusions (41) are inserted into the slots (54).

5. The grate structure of a sintering machine according to claim 1, characterized in that, The first elastic pressure plate (5) and the second elastic pressure plate (51) are respectively inserted and supported at the grate tail (4) spacing of the adjacent grate body (1).

6. The grate structure of a sintering machine according to claim 1, characterized in that, The elastic element (53) is sleeved with a protective sleeve (52) on its outer side.

7. The grate structure of a sintering machine according to claim 6, characterized in that, The first elastic pressure plate (5) and the second elastic pressure plate (51) are symmetrically inserted at the two ends of the protective sleeve (52).

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