Composite anchoring part structure for rotary kiln

Abstract

The utility model discloses a composite anchoring part structure for a rotary kiln, which comprises a fixed block and an anchoring hook, the fixed block is fixed on a rotary kiln cylinder, the anchoring hook is fixedly connected with the fixed block, two free ends of the anchoring hook extend towards the center direction of the rotary kiln cylinder and respectively form anchoring arms, and the anchoring arms are anchored in refractory castable; the anchoring arm is sequentially provided with a parallel section, an external expansion section and three-dimensional expansion sections from the end close to the fixing block to the free end of the anchoring arm, and the two three-dimensional expansion sections are bent and extend in the direction intersecting with the first plane. According to the utility model, the three-dimensional expansion section mainly used for anchoring presents a V-shaped projection in a three-dimensional space, so that the refractory castable can be well anchored, and the connection strength with the rotary kiln cylinder body is improved; by arranging the two parallel sections which are parallel to each other, when the anchoring hook is slightly deformed due to stress, the parallel sections can bear and buffer deformation, the whole parallel sections serve as buffer sections, and stress concentration is avoided.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln lining technology. Specifically, it relates to a composite anchor structure for rotary kilns. Background Technology

[0002] To improve the integrity of the lining and prevent it from detaching during rotary kiln operation, anchoring hooks are installed inside the kiln shell to secure the lining. In existing technology, these anchoring hooks are typically welded to the kiln shell. During operation, the anchoring hooks are subjected to shear forces, making them prone to breakage and causing the entire lining to detach. While extending the weld length between the anchoring hook and the kiln shell can enhance the weld strength, this increases the difficulty of subsequent maintenance. To improve the anchoring force, the anchoring hooks are generally designed with a "V" shape. However, under alternating shear forces, stress concentrates at the endpoints of the "V," making them prone to breakage. Furthermore, the refractory castable around the "V" endpoints is susceptible to micro-cracks, leading to further cracking and detachment of the refractory castable. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a composite anchor structure for rotary kilns that improves the integrity of the inner lining, enhances the stability of the connection between the refractory castable and the cylinder, and facilitates maintenance.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a composite anchor structure for a rotary kiln, comprising a fixing block and an anchor hook. The fixing block is fixed to the rotary kiln shell, and the anchor hook is fixedly connected to the fixing block. Both free ends of the anchor hook extend towards the center of the rotary kiln shell and respectively form anchor arms. The anchor arms are anchored in refractory castable. From one end adjacent to the fixing block to the free end of the anchor arm, the anchor arm consists of a parallel section, an outwardly expanding section, and a three-dimensionally expanding section. On a first plane coinciding with the axes of the two anchor arms: the two parallel sections are parallel to each other, the distance between the two outwardly expanding sections gradually increases along the direction of the anchor arm extension, and the two three-dimensionally expanding sections bend and extend towards the direction intersecting the first plane.

[0005] The aforementioned composite anchor structure for a rotary kiln has the following features: on a second plane parallel to the extension direction of the anchor arm and perpendicular to the first plane, the three-dimensional expansion section of the first anchor arm bends toward one side of the first plane, and the three-dimensional expansion section of the second anchor arm bends toward the other side of the first plane.

[0006] In the aforementioned composite anchor structure for rotary kilns, on the second plane: the included angle C of the orthographic projection of the two three-dimensional expansion segments on the second plane is 70° to 120°; and the two three-dimensional expansion segments are symmetrically arranged about the first plane.

[0007] In the aforementioned composite anchor structure for rotary kilns, on the first plane, the two three-dimensional expansion sections bend in opposite directions from the position where they are connected to the outer expansion section.

[0008] The aforementioned composite anchor structure for rotary kilns has two three-dimensional expansion segments symmetrically arranged on a first plane, with the included angle B between the two three-dimensional expansion segments being 70° to 120°.

[0009] The aforementioned composite anchor structure for a rotary kiln further includes a connecting section, which penetrates the fixing block and is fixedly connected to the parallel sections of the two anchor arms respectively.

[0010] In the aforementioned composite anchor structure for rotary kilns, the connecting section is either a straight section or an arc-shaped section, and the distance between the two ends of the connecting section is 30–60 mm.

[0011] In the aforementioned composite anchor structure for rotary kilns, the length of the three-dimensional expansion section is 25–45 mm; the length of the outer expansion section is 100–140 mm; the length of the parallel section is 30–65 mm; and the included angle A between the two outer expansion sections is 40°–45°.

[0012] The aforementioned composite anchor structure for rotary kilns has a circular cross-sectional shape for the anchor arm, with a cross-sectional diameter of 8–14 mm. The anchor arm is made of 310 stainless steel bar, 310S stainless steel bar, 304 stainless steel bar, or Q235 steel bar.

[0013] The aforementioned composite anchor structure for a rotary kiln includes a fixing block with a length of 40-60 mm, a height of 40-60 mm, and a thickness of 8-14 mm. A circular hole with a diameter of 10-16 mm is provided on the fixing block along its thickness direction. One side wall of the fixing block along its thickness direction is welded to the rotary kiln shell. The vertical distance between the center of the circular hole and the rotary kiln shell is 20-40 mm.

[0014] The technical solution of this utility model has achieved the following beneficial technical effects:

[0015] 1. In this utility model, the three-dimensional expansion section, which is mainly responsible for anchoring, presents a V-shaped projection in three-dimensional space, which can effectively anchor the refractory castable and improve the connection strength with the rotary kiln shell. By setting two parallel sections, when the anchor hook is subjected to slight deformation, the parallel sections can withstand and buffer the deformation. The parallel sections as a whole act as buffer sections, avoiding stress concentration. In conjunction with the fixing block, the stress acting at the welded connection with the shell is further reduced, ensuring the anchoring effect of the refractory castable.

[0016] 2. In this utility model, the connecting section of the anchor hook passes through the fixing block and is fixed by spot welding. During the operation of the rotary kiln, when the anchor hook is subjected to shear stress, it can move slightly relative to the fixing block, which avoids the rotary kiln lining material falling off due to the breakage of the anchor hook. The connection area between the fixing block and the cylinder is small, which is extremely convenient during equipment maintenance, greatly improves maintenance efficiency, and reduces maintenance costs. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of the composite anchor structure for rotary kilns of this utility model;

[0018] Figure 2 A front view schematic diagram of the composite anchor structure for rotary kilns of this utility model;

[0019] Figure 3 A side view of the composite anchor structure for rotary kilns of this utility model.

[0020] The reference numerals in the figure are as follows: 1-fixed block; 2-anchor hook; 3-anchor arm; 31-parallel section; 32-outward expansion section; 33-three-dimensional expansion section; 34-connecting section; 4-first plane; 5-second plane. Detailed Implementation

[0021] The composite anchor structure for the rotary kiln in this embodiment is as follows: Figure 1 As shown, the device includes a fixing block 1 and an anchoring hook 2. The fixing block 1 is welded and fixed to the rotary kiln shell. The anchoring hook 2 is fixedly connected to the fixing block 1. Both free ends of the anchoring hook 2 extend towards the center of the rotary kiln shell and respectively form anchoring arms 3. The anchoring arms 3 are anchored in the refractory castable. In practical applications, the anchoring hook 2 can be made by bending a round bar. The cross-sectional shape of the anchoring arm 3 is circular and the diameter is equal. The cross-sectional diameter of the anchoring arm 3 is 8-14mm. The anchoring hook 2 is made of 310 stainless steel bar, 310S stainless steel bar, 304 stainless steel bar or Q235 steel bar. In this embodiment, the anchoring hook 2 is made of 12mm diameter 310S stainless steel bar.

[0022] like Figure 2As shown, the anchoring arm 3 consists of a parallel section 31, an outwardly expanding section 32, and a three-dimensionally expanding section 33, extending from one end adjacent to the fixing block 1 to the free end of the anchoring arm 3. The fixing block 1 has a circular hole along its thickness direction. The connecting section 34 passes through the circular hole on the fixing block 1 and is connected to the fixing block 1 by spot welding after passing through the circular hole. The thickness of the fixing block 1 is 8-14mm, preferably 12mm. The distance between the two ends of the connecting section 34 is 30-60mm. The two ends of the connecting section 34 are respectively fixedly connected to two parallel sections 31. The length of the parallel section 31 is 30-65mm. There is a certain gap between the parallel section 31 and the fixing block 1. The connecting section 34 is a straight section or an arc section.

[0023] like Figure 2 As shown, the length of the fixing block 1 is 40-60mm and the height is 40-60mm; the diameter of the circular hole is 10-16mm, and the diameter of the circular hole is 14mm. One side wall of the fixing block 1 in the thickness direction is welded to the rotary kiln body. The vertical distance between the center of the circular hole and the rotary kiln body is 20-40mm. After the fixing block 1 is welded to the rotary kiln body, there is a certain distance between the connecting section 34 and the rotary kiln body.

[0024] like Figure 2 As shown, on the first plane 4 that coincides with the axes of the two anchor arms 3: the two parallel segments 31 are parallel to each other, the spacing between the two outwardly expanding segments 32 gradually increases along the direction of extension of the anchor arms 3 to form an expanding shape, the length of the outwardly expanding segment 32 is 100-140mm, the included angle A between the two outwardly expanding segments 32 is 40°-45°, preferably 45°, and the two three-dimensional expanding segments 33 bend and extend in the direction of intersection with the first plane 4 to form a bend in the three-dimensional space direction, the length of the three-dimensional expanding segment 33 is 25-45mm.

[0025] like Figure 3 As shown, further, on a second plane 5 parallel to the extension direction of the anchoring arm 3 and perpendicular to the first plane 4: the three-dimensional expansion segment 33 of the first anchoring arm 3 bends towards one side of the first plane 4, and the three-dimensional expansion segment 33 of the second anchoring arm 3 bends towards the other side of the first plane 4; the included angle C of the orthographic projections of the two three-dimensional expansion segments 33 on the second plane 5 is 70° to 120°, preferably 90°, and the two three-dimensional expansion segments 33 are symmetrically arranged about the first plane 4; as Figure 2 As shown, on the first plane 4: the two three-dimensional expansion segments 33 bend in opposite directions from the position where they are connected to the outer expansion segment 32; the two three-dimensional expansion segments 33 are symmetrically arranged, and the included angle B between the two three-dimensional expansion segments 33 is 70° to 120°, preferably 90°. The three-dimensional expansion segments 33 are bent in two directions, which greatly improves the anchoring effect.

[0026] 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. A composite anchor structure for a rotary kiln, characterized in that, It includes a fixing block (1) and an anchor hook (2). The fixing block (1) is fixed on the rotary kiln shell. The anchor hook (2) is fixedly connected to the fixing block (1). The two free ends of the anchor hook (2) extend towards the center of the rotary kiln shell and form anchor arms (3) respectively. The anchor arms (3) are anchored in the refractory castable. The anchor arm (3) consists of a parallel segment (31), an outward expansion segment (32), and a three-dimensional expansion segment (33) from one end adjacent to the fixed block (1) to the free end of the anchor arm (3). On the first plane (4) which coincides with the axis of the two anchor arms (3): the two parallel segments (31) are parallel to each other, the distance between the two outward expansion segments (32) gradually increases along the direction of extension of the anchor arm (3), and the two three-dimensional expansion segments (33) bend and extend in the direction of intersection with the first plane (4).

2. The composite anchor structure for a rotary kiln according to claim 1, characterized in that, On a second plane (5) that is parallel to the extension direction of the anchor arm (3) and perpendicular to the first plane (4): the three-dimensional expansion segment (33) of the first anchor arm (3) bends toward one side of the first plane (4), and the three-dimensional expansion segment (33) of the second anchor arm (3) bends toward the other side of the first plane (4).

3. The composite anchor structure for a rotary kiln according to claim 2, characterized in that, On the second plane (5): the angle C between the orthographic projections of the two three-dimensional expansion segments (33) on the second plane (5) is 70° to 120°; and the two three-dimensional expansion segments (33) are symmetrically arranged about the first plane (4).

4. The composite anchor structure for a rotary kiln according to claim 2, characterized in that, On the first plane (4): the two three-dimensional expansion segments (33) bend in opposite directions from the position where they are connected to the outer expansion segment (32).

5. The composite anchor structure for a rotary kiln according to claim 4, characterized in that, On the first plane (4): the two three-dimensional expansion segments (33) are symmetrically arranged, and the included angle B between the two three-dimensional expansion segments (33) is 70° to 120°.

6. The composite anchor structure for a rotary kiln according to claim 1, characterized in that, The anchor hook (2) also includes a connecting section (34), which passes through the fixing block (1) and is fixedly connected to the parallel sections (31) of the two anchor arms (3) respectively.

7. The composite anchor structure for a rotary kiln according to claim 6, characterized in that, The connecting segment (34) is a straight segment or an arc segment, and the distance between the two ends of the connecting segment (34) is 30-60mm.

8. A composite anchor structure for a rotary kiln according to any one of claims 1-7, characterized in that, The length of the three-dimensional expansion segment (33) is 25-45 mm; the length of the outer expansion segment (32) is 100-140 mm; the length of the parallel segment (31) is 30-65 mm; and the included angle A between the two outer expansion segments (32) is 40°-45°.

9. A composite anchor structure for a rotary kiln according to any one of claims 1-7, characterized in that, The cross-sectional shape of the anchor arm (3) is circular, and the cross-sectional diameter of the anchor arm (3) is 8-14 mm; the anchor arm (3) is made of 310 stainless steel bar, 310S stainless steel bar, 304 stainless steel bar or Q235 steel bar.

10. A composite anchor structure for a rotary kiln according to any one of claims 1-7, characterized in that, The length of the fixing block (1) is 40-60mm, the height is 40-60mm, and the thickness is 8-14mm. A circular hole is provided on the fixing block (1) along its thickness direction. The diameter of the circular hole is 10-16mm. One side wall of the fixing block (1) in the thickness direction is welded to the rotary kiln body. The vertical distance between the center of the circular hole and the rotary kiln body is 20-40mm.

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