Anchoring part structure for rotary kiln

Abstract

The anchoring part structure for the rotary kiln comprises an anchoring hook with the circular section and a cuboid-shaped fixing block, and the anchoring hook comprises a first short straight section, a first long straight section, a connecting section, a second long straight section and a second short straight section which are sequentially connected; the axis of the first long straight section, the axis of the connecting section and the axis of the second long straight section are all located in a first anchoring plane. The first long straight section and the second long straight section are opened in a V shape; the axis of the first short straight section and the axis of the second short straight section intersect with the first anchoring plane. The bottom face of the fixing block is a welding face used for fixedly connecting the anchoring part structure and a rotary kiln cylinder. The anchoring part structure provided by the utility model is convenient to overhaul, is firmly welded with the rotary kiln cylinder body, and is beneficial to enhancing the stability of the connection between the refractory castable and the cylinder body by using the anchoring part structure.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary kiln anchoring equipment. Specifically, it relates to an anchoring device structure for rotary kilns. Background Technology

[0002] In recent years, with continuous improvements in construction methods and breakthroughs in refractory material research and development, rotary kiln linings have begun to widely adopt monolithic casting with refractory castables. To improve the integrity of the lining, anchor hooks are installed inside the rotary kiln shell. Currently, most anchor hooks used in rotary kilns employ a single structure, meaning the anchor hook is directly connected to the shell by welding. To avoid damaging the anchor hook's strength during welding, spot welding is typically used, but this often leads to weld detachment, which in turn damages the refractory material. Therefore, rotary kilns require frequent maintenance.

[0003] In existing technologies, the welding strength between the anchor hook and the rotary kiln shell is typically enhanced by extending the welding length (90–120 mm) between the anchor hook and the shell. However, increasing the welding length is not conducive to subsequent maintenance work. To further strengthen the integrity of the shell and the refractory castable, existing anchor hooks are often designed to include multiple short straight sections. However, this approach can easily lead to localized stress concentration, thereby damaging the refractory castable. In addition, existing V-shaped, Y-shaped, and other anchor hook designs have all connecting sections almost overlapping on the same plane in spatial position, which limits their anchoring effect on the castable. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide an anchor structure for rotary kilns. This anchor structure is easy to maintain and is firmly welded to the rotary kiln shell. Using this anchor helps to enhance the stability of the connection between the refractory castable and the shell.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An anchor structure for a rotary kiln includes a curved columnar anchor hook and a cuboid fixing block. The anchor hook comprises a first short straight section, a first long straight section, a connecting section, a second long straight section, and a second short straight section connected in sequence. The axes of the first long straight section, the connecting section, and the second long straight section are all located within a first anchoring plane, and the axes of the first short straight section and the second short straight section intersect the first anchoring plane. The first long straight section and the second long straight section are V-shaped, and when the anchor structure is installed in the rotary kiln shell, the V-shaped opening faces the kiln cavity. The connecting section passes through through holes penetrating two opposite sides of the fixing block. The bottom surface of the fixing block is a welding surface for fixing the anchor structure to the rotary kiln shell. The first long straight section, the connecting section, and the second long straight section are all located within the first anchoring plane, while the axes of the first short straight section and the second short straight section intersect the first anchoring plane. This results in an anchoring plane being formed between the first short straight section and the first long straight section, and between the second short straight section and the second long straight section. These two anchoring planes, together with the first anchoring plane, play an anchoring role, which helps to expand the anchoring range of the anchoring hook.

[0007] In the aforementioned rotary kiln anchor structure, there is one first short straight section and one second short straight section. The projection plane is a plane perpendicular to both the first anchoring plane and the welding surface. The angle β between the vertical projection of the axis of the first short straight section and the vertical projection of the axis of the second short straight section on the projection plane is 70° to 120°. When the value of β is lower or higher than this range of 70° to 120°, the angle between the two short straight sections is too large or too small, which weakens the anchoring effect of the short straight sections.

[0008] In the aforementioned anchor structure for rotary kilns, the included angle β is 90°. When β is 90°, the short straight section provides stronger anchoring for the surrounding castable refractory.

[0009] In the above-described anchor structure for rotary kilns, the first end of the first short straight section is connected to the first long straight section; the first end of the second short straight section is connected to the second long straight section; and the second ends of the first short straight section and the second short straight section respectively point to different sides of the first anchoring plane.

[0010] In the aforementioned rotary kiln anchor structure, on the projection plane, the vertical projections of the first short straight segment and the second short straight segment are axially symmetrical about the vertical projection axis of the first long straight segment.

[0011] In the aforementioned rotary kiln anchor structure, the opening angle α of the "V" shape formed by the first and second long straight sections is 40° to 65°. The size of the opening angle α affects the amount of refractory castable anchored by a single anchor structure. If α is too large, the number of anchor structures per unit area is limited, the anchor hooks bear a heavy load, and the anchor hooks are easily damaged. If α is too small, the anchor structures are arranged too densely, resulting in waste.

[0012] In the above-mentioned rotary kiln anchor structure, the anchor hook is a curved cylinder with equal diameter at all points, and the diameter of the cross-sectional circle of the anchor hook is 8-14 mm.

[0013] In the above-mentioned anchor structure for rotary kilns, the lengths of the first long straight section and the second long straight section are both 185-225 mm; the lengths of the first short straight section and the second short straight section are both 25-45 mm.

[0014] In the aforementioned rotary kiln anchor structure, the connecting section can be a straight section or an arc-shaped section. When the connecting section is arc-shaped, the radius of the arc is 20–23 mm, and the arc length is 20–50 mm. When the connecting section is straight, the length of the connecting section is 20–50 mm. If the length of the connecting section is too long, the number of anchor structures per unit area on the rotary kiln shell is insufficient, the anchor hooks bear a heavy load, and the anchor hooks are easily damaged.

[0015] Preferably, when the connecting segment is arc-shaped, the lowest point of the arc is the welding fixing point, making it easier to find the welding position during welding.

[0016] In the above-mentioned rotary kiln anchor structure, the length of the fixing block is 40-60mm, the height is 40-60mm, and the thickness is 8-14mm; the through hole is a round hole with a diameter of 10-16mm, and the vertical distance between the axis of the through hole and the welding surface is 22-40mm.

[0017] The technical solution of this utility model has achieved the following beneficial technical effects:

[0018] 1. In this utility model, the short straight sections on the anchor hook present a "V" shaped projection in space, with mutual angles of 70° to 120°. This unique structural design not only optimizes the function of the anchor but also expands the range of application of refractory castables, making them adaptable to more complex working conditions and improving overall performance.

[0019] 2. In this utility model, the anchor hook structure is rationally designed, optimizing the stress on the anchor hook while ensuring firm anchoring. Furthermore, the anchor hook and fixing block only require spot welding for fixation, avoiding the damage to the anchor hook that may occur with traditional full welding. Simultaneously, the full weld connection between the fixing block and the cylinder greatly enhances the structural integrity of the refractory lining. The welding side length of the fixing block is only 40-60mm, making equipment maintenance extremely convenient, significantly improving maintenance efficiency and reducing maintenance costs.

[0020] 3. The anchoring hook in this invention features two short, straight sections. While increasing the anchoring force on the refractory castable material, by limiting the number of these sections to two and their length to within the range of 25-45mm, the expansion force at both ends of the short, straight sections is effectively reduced when used in conjunction with the inner lining (i.e., the refractory castable material). This significantly reduces the risk of localized damage to the inner lining. This design ensures stability under high temperatures and dynamic operating conditions, extending the service life of the inner lining.

[0021] 4. The combined anchor structure of this utility model has a large contact area with the refractory castable, and the anchors form a tight mesh structure, which significantly improves the thermal shock stability of the refractory material. This characteristic makes the material more resilient when facing drastic temperature changes, ensuring reliable operation of the equipment under extreme conditions. Attached Figure Description

[0022] Figure 1 Front view of the anchor structure in Embodiment 1 of this utility model;

[0023] Figure 2 Side view of the anchor structure in Embodiment 1 of this utility model;

[0024] Figure 3 Top view of the anchor structure in Embodiment 1 of this utility model;

[0025] Figure 4 A side view of the anchor structure in an embodiment of this utility model;

[0026] Figure 5 A top view of the anchor structure in Embodiment 3 of this utility model;

[0027] Figure 6 A top view of the anchor structure in Embodiment 4 of this utility model;

[0028] Figure 7 A side view of the anchor structure in Embodiment 4 of this utility model.

[0029] The reference numerals in the figure are as follows: 1-anchor hook; 11-first long straight section; 12-connecting section; 13-second long straight section; 14-first short straight section; 15-second short straight section; 2-fixing block; 21-through hole; 22-welding surface. Detailed Implementation

[0030] Example 1

[0031] The rotary kiln anchor structure in this embodiment includes an anchor hook 1 and a fixing block 2. The anchor hook 1 is a cylinder with a uniform diameter (its cross-section is circular), and the fixing block 2 is a cuboid with a welding surface 22 on its bottom surface, and the welding surface 22 is cut with rounded corners (e.g., Figure 1 and Figure 2 As shown), this allows the fixing block 2 to be tightly welded (fully welded) to the rotary kiln cylinder via the welding surface 22.

[0032] A circular through hole 21 is provided on the fixing block 2, the through hole 21 passing between two opposite sides of the fixing block 2, and the center of the through hole 21 coincides with the center of the side it passes through. Figure 2 As shown.

[0033] The anchor hook 1 is an integrally bent structure, comprising a first long straight section 11, a connecting section 12, and a second long straight section 13 connected in sequence. The connecting section 12 passes through the through holes 21 on two opposite sides of the fixing block 2. The first long straight section 11 and the second long straight section 13 are open in a "V" shape. When the anchor structure is installed in the cylinder of the rotary kiln, the opening of the "V" shape faces the furnace cavity of the rotary kiln. That is, the anchor hook 1 passes through the through holes 21 on the fixing block 2 and is fixed to the through holes 21 by spot welding at the middle position of the connecting section 12 at the tip of the "V".

[0034] Furthermore, short straight segments are connected to the ends of the first long straight segment 11 and the second long straight segment 13 away from the connecting segment 12, respectively. These short straight segments are also cylindrical. The short straight segment connected to the first long straight segment 11 is the first short straight segment 14, and the short straight segment connected to the connecting segment 12 is the second short straight segment 15.

[0035] In this embodiment, the axis of the first long straight segment 11 and the axis of the second long straight segment 13 form a first anchoring plane. The axes of the first long straight segment 11, the connecting segment 12, and the second long straight segment 13 are all located within the first anchoring plane. The opening angle α of the "V" shape formed by the first long straight segment 11 and the second long straight segment 13 is 50°. Figure 1 As shown.

[0036] In this embodiment, there is one first short straight segment 14 and one second short straight segment 15. The first end of the first short straight segment 14 is connected to the first long straight segment 11; the first end of the second short straight segment 15 is connected to the second long straight segment 13; the second ends of the first short straight segment 14 and the second short straight segment 15 point to different sides of the first anchoring plane. The axes of the first short straight segment 14 and the second short straight segment 15 both intersect the first anchoring plane. On the plane where the welding surface 22 is located: the vertical projection of the axis of the first short straight segment 14 is parallel to the vertical projection of the axis of the second short straight segment 15, as shown below. Figure 3 As shown. Using a plane perpendicular to both the first anchoring plane and the welding surface 22 as the projection plane, the angle β between the vertical projection of the axis of the first short straight segment 14 and the vertical projection of the axis of the second short straight segment 15 on the projection plane is 90°. Furthermore, on the projection plane, the vertical projections of the first short straight segment 14 and the second short straight segment 15 are symmetrical about the vertical projection axis of the axis of the first long straight segment 11. Figure 2 As shown.

[0037] In this embodiment, the projections of the first short straight segment 14 and the second short straight segment 15 on the projection plane form a "V" shape, which can broaden the effective range of the anchor hook on the refractory castable. In some other embodiments, the second end of the first short straight segment 14 and the second end of the second short straight segment 15 may also point to the same side of the first anchoring plane, such as... Figure 4 As shown. At this time, the projections of the first short straight segment 14 and the second short straight segment 15 on the projection plane are still "V" shaped. When the first short straight segment 14 and the second short straight segment 15 are arranged in this way, although the range of action of the anchoring hook in the thickness direction of the refractory castable is widened, the anchoring effect on the refractory castable material on the other side of the first anchoring plane (the side opposite to the second end of the first short straight segment 14 and the second end of the second short straight segment 15) is slightly worse.

[0038] In addition, in some other embodiments, the opening angle α can be other values ​​in the range of 40° to 65°, and the included angle β can be other values ​​in the range of 70° to 120°.

[0039] When welded in a rotary kiln, the fixing block 2 of the anchor structure is welded to the cylinder, and the anchor structure is arranged in several rings around the axis of the rotary kiln. In the same ring of anchor structure, the first anchoring planes of two adjacent anchor structures are perpendicular to each other, and between two adjacent rings of anchor structures, the first anchoring planes are parallel and the anchor structures are staggered.

[0040] In this embodiment, the connecting segment 12 is a straight segment with a length of 25mm. The first long straight segment 11 and the second long straight segment 13 are both 200mm long, and the first short straight segment 14 and the second short straight segment 15 are both 30mm long. The anchor hook 1 is a round steel bar with a diameter (diameter of the cross-section circle) of 12mm. The steel used for the anchor hook 1 and the fixing block 2 is grade 310S. The fixing block 2 is 50mm long, 48mm high, and 10mm thick. The through hole 21 has a diameter of 15mm, and its axis passes through the center of the fixing block 2. The center of the through hole 21 is 24mm away from the welding surface.

[0041] In some other embodiments, the round steel bar used to make the anchor hook 1 can be any of 310, 310S, 304 and Q235; the steel grade of the fixing block can be any of 310, 310S, 304 and Q235.

[0042] In other embodiments, the dimensions of the anchor hook 1 and the fixing block 2 can be adjusted as needed, but the adjusted dimensions should meet the following conditions: the diameter of the cross-sectional circle of the anchor hook 1 is 8-14 mm; the length of the first long straight section 11 and the length of the second long straight section 13 are both 185-225 mm; the connecting section 12 is a straight section or an arc section; when the connecting section 12 is an arc section, the radius of the arc is 20-23 mm and the arc length is 20-50 mm; when the connecting section 12 is a straight section, the length of the connecting section 12 is 20-50 mm; the length of the first short straight section 14 and the second short straight section 15 are both 25-45 mm; the length of the fixing block 2 is 40-60 mm, the height is 40-60 mm, and the thickness is 8-14 mm; the diameter of the through hole 21 is 10-16 mm, and the vertical distance between the axis of the through hole 21 and the welding surface 22 is 22-40 mm.

[0043] Example 2

[0044] The main difference between the anchor structure in this embodiment and that in embodiment 1 is that the connecting segment 12 in this embodiment is an arc-shaped segment; the lengths of the first long straight segment 11 and the second long straight segment 13 are both 185mm, and the lengths of the first short straight segment 14 and the second short straight segment 15 are both 35mm. That is, compared with embodiment 1, the lengths of the long straight segments in this embodiment are shorter, and the lengths of the short straight segments are longer.

[0045] Adjusting the length ratio of the long and short straight sections will change the distribution of the anchoring force. In practical applications, the lengths of the long and short straight sections can be adjusted according to the specific thickness of the refractory casting material and the diameter of the rotary kiln to ensure that the anchoring force is evenly distributed in both the thickness and circumferential directions of the refractory casting material.

[0046] Example 3

[0047] The main difference between the anchor structure in this embodiment and that in embodiment 1 is that, on the plane where the welding surface 22 is located: the vertical projection of the axis of the first short straight segment 14 and the vertical projection of the axis of the second short straight segment 15 are not parallel, and on the projection plane, there is no symmetrical relationship between the projections of the first short straight segment 14 and the second short straight segment 15. Figure 5 As shown.

[0048] When the first short straight section 14 and the second short straight section 15 are arranged in this way, the projection of the first short straight section 14 and the projection of the second short straight section 15 form a "V" shape on the projection plane, which can widen the range of action of the anchor hook on the refractory castable. However, in this embodiment, the axis of the first long straight section 11 and the axis of the first short straight section 14 form a second anchoring plane, and the axis of the second long straight section 13 and the axis of the second short straight section 15 form a third anchoring plane. The extension directions of the second anchoring plane and the extension directions of the third anchoring plane are not parallel. Therefore, compared with the anchor structure in Embodiment 1, the uniformity of the anchoring force distribution of the single anchor structure on the refractory castable in this embodiment is slightly reduced (i.e., the anchoring force distribution in various directions is not uniform). However, when the anchor structure in this embodiment is welded to the cylinder of the rotary kiln in the same way as in Embodiment 1, it can generate anchoring force on the refractory castable in multiple anchoring directions, which is beneficial to improving the anchoring effect.

[0049] Example 4

[0050] The main difference between the anchor structure in this embodiment and that in embodiment 1 is that, although the second ends of the first short straight segment 14 and the second short straight segment 15 point to opposite sides of the first anchoring plane, there is no axial symmetry between the vertical projections of the first short straight segment 14 and the second short straight segment 15 about the axis of the first long straight segment 11 on the projection plane. The second ends of the first and second short straight segments are at different heights. Figure 6 and Figure 7 As shown.

[0051] In this embodiment, on the projection plane, the projections of the first short straight segment 14 and the second short straight segment 15 form a "V" shape, which can broaden the range of action of the anchor hook on the refractory castable. Compared with Embodiment 1, in this embodiment, the distribution height of the anchoring force formed by the first short straight segment 14 and the first long straight segment 11 on the refractory castable is inconsistent with the distribution height of the anchoring force formed by the second long straight segment 13 and the second short straight segment 15 on the refractory castable. When the anchor structure in this embodiment is welded to the cylinder of the rotary kiln in the same way as in Embodiment 1, it can generate anchoring force on the refractory castable at multiple anchoring heights, which is beneficial to improving the anchoring effect.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. An anchor structure for a rotary kiln, comprising a curved columnar anchor hook (1) and a cuboid-shaped fixing block (2), characterized in that, The anchoring hook (1) includes a first short straight section (14), a first long straight section (11), a connecting section (12), a second long straight section (13), and a second short straight section (15) connected in sequence; the axis of the first long straight section (11), the axis of the connecting section (12), and the axis of the second long straight section (13) are all located in the first anchoring plane, and the axis of the first short straight section (14) and the axis of the second short straight section (15) intersect the first anchoring plane; the first long straight section (11) and the second long straight section (13) are open in a "V" shape, and when the anchoring structure is installed in the cylinder of the rotary kiln, the "V" shaped opening faces the furnace cavity of the rotary kiln; the connecting section (12) passes through the through hole (21) through the two opposite sides of the fixing block (2); the bottom surface of the fixing block (2) is a welding surface (22) for fixing the anchoring structure to the rotary kiln cylinder.

2. The anchor structure for rotary kilns according to claim 1, characterized in that, The number of the first short straight segment (14) and the second short straight segment (15) is one; the plane perpendicular to the plane where the first anchoring plane and the welding surface (22) are located is the projection plane, and the angle β between the vertical projection of the axis of the first short straight segment (14) on the projection plane and the vertical projection of the axis of the second short straight segment (15) on the projection plane is 70° to 120°.

3. The anchor structure for rotary kilns according to claim 2, characterized in that, The included angle β is 90°.

4. The anchor structure for a rotary kiln according to claim 2, characterized in that, The first end of the first short straight segment (14) is connected to the first long straight segment (11); the first end of the second short straight segment (15) is connected to the second long straight segment (13); the second ends of the first short straight segment (14) and the second ends of the second short straight segment (15) point to different sides of the first anchoring plane.

5. The anchor structure for a rotary kiln according to claim 4, characterized in that, On the projection plane, the vertical projections of the first short straight segment (14) and the second short straight segment (15) are axially symmetrical about the vertical projection axis of the first long straight segment (11).

6. The anchor structure for a rotary kiln according to claim 1, characterized in that, The opening angle α of the "V" shape formed by the first long straight segment (11) and the second long straight segment (13) is 40° to 65°.

7. The anchor structure for a rotary kiln according to claim 1, characterized in that, The anchor hook (1) is a curved cylinder with equal diameter at all points, and the diameter of the cross-sectional circle of the anchor hook (1) is 8 to 14 mm.

8. The anchor structure for a rotary kiln according to claim 1, characterized in that, The lengths of the first long straight segment (11) and the second long straight segment (13) are both 185-225 mm; the lengths of the first short straight segment (14) and the second short straight segment (15) are both 25-45 mm.

9. The anchor structure for a rotary kiln according to claim 1, characterized in that, The connecting segment (12) is a straight segment or an arc segment; when the connecting segment (12) is an arc segment, the radius of the arc is 20-23mm and the arc length is 20-50mm; when the connecting segment (12) is a straight segment, the length of the connecting segment (12) is 20-50mm.

10. The anchor structure for a rotary kiln according to any one of claims 1-9, characterized in that, The length of the fixing block (2) is 40-60mm, the height is 40-60mm, and the thickness is 8-14mm; the through hole (21) is a round hole with a diameter of 10-16mm, and the vertical distance between the axis of the through hole (21) and the welding surface (22) is 22-40mm.

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