Seamless wear-resistant elbow

Abstract

The utility model discloses a seamless wear-resistant elbow which comprises an elbow pipe, the two ends of the elbow pipe are connected with straight pipes through flange plates, the middle of the elbow pipe is fixedly sleeved with a fixing sleeve, the end wall of the fixing sleeve is fixedly connected with supporting rods, the movable ends of the supporting rods abut against the end walls of the flange plates, and one end wall of the fixing sleeve is connected with at least two supporting rods. The bent pipe is provided with a plurality of layers and comprises a corundum ceramic layer, a transition layer and a metal layer from inside to outside. By means of the multi-layer composite pipe structure, the abrasion resistance, the heat resistance, the hardness and the strength of the elbow are improved, a supporting structure is formed outside the elbow through the fixing sleeve and the supporting rod, and the strength and the stability of the elbow are further improved.

Description

Technical Field

[0001] This utility model relates to the field of phosphorus slag and mineral slag conveying technology in the production process of yellow phosphorus, and in particular to a seamless wear-resistant elbow. Background Technology

[0002] The phosphorus slag produced during the current yellow phosphorus production process has an extremely high solids content, requiring pipe elbows used for transportation to meet characteristics such as high temperature, high pressure, large curvature, and high wear resistance. Current technology can only form these elbows by splicing together several sections of wear-resistant pipe. During use, the wear-resistant ceramic layer at the internal weld seams of these pipe elbows is easily worn away, leading to pipe perforation and leakage, significantly reducing the service life of these pipes. Summary of the Invention

[0003] The technical problem to be solved by this utility model is that the internal weld seam is prone to wear and perforation when using spliced ​​pipe elbows.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a seamless wear-resistant elbow, which includes a bend, the two ends of the bend are connected to straight pipes through flanges, a fixed sleeve is fixedly sleeved in the middle of the bend, a support rod is fixedly connected to the end wall of the fixed sleeve, the movable end of the support rod abuts against the end wall of the flange, and no less than two support rods are connected to one end wall of the fixed sleeve. The bend is provided with multiple layers, which are, from the inside to the outside, a corundum ceramic layer, a transition layer and a metal layer.

[0005] Preferably, a support ring is fixedly connected to the movable end of the strut, the support ring is fitted onto the end of the bend, and the end wall of the support ring is in contact with the end wall of the flange.

[0006] Preferably, the end wall of the support ring has a limiting hole for inserting the bolt head on the flange, and the inner wall of the limiting hole fits against the outer wall of the bolt head.

[0007] Preferably, the support rod includes a first support rod and a second support rod, with the movable ends of the first support rod and the second support rod respectively fixed to the bottom and one side of the end wall of the support ring.

[0008] Preferably, the inner side of the support ring is provided with a connecting protrusion, the inner ring of the connecting protrusion is attached to the outer wall of the bent pipe, and the first support rod and the second support rod are both connected to the connecting protrusion.

[0009] 1. This utility model provides a seamless wear-resistant elbow. The elbow includes a corundum ceramic layer, a transition layer, and a metal layer. The ceramic layer is formed into dense corundum ceramic (AL2O3) at a high temperature above 2200℃. The transition layer forms a strong bond with the metal layer, which improves the wear resistance of the inner layer of the elbow. The resulting composite elbow fully utilizes the high strength, good toughness, and good weldability of steel pipe and the high hardness, high wear resistance, corrosion resistance, and good heat resistance of corundum ceramic. It overcomes the characteristics of low hardness and poor wear resistance of steel pipe and poor toughness of ceramic, thus extending the service life of the elbow.

[0010] 2. By fixing support rings on the bend, the first and second struts are fixedly connected through the support rings. The first and second struts are respectively connected to two support rings. The support rings are fitted and supported by the flanges at both ends of the bend, which further improves the stability and strength of the bend connection. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0012] Figure 1 This is a structural front view of an embodiment of the present utility model.

[0013] Figure 2 This is a cross-sectional view of the elbow in an embodiment of this utility model.

[0014] Figure 3 This is a schematic diagram of the support ring in an embodiment of the present invention.

[0015] In the diagram: 1. Bend; 2. Straight pipe; 3. Flange; 4. Fixing sleeve; 5. First strut; 6. Second strut; 7. Support ring; 8. Connecting protrusion; 9. Transition layer; 10. Corundum ceramic layer; 11. Metal layer. Detailed Implementation

[0016] like Figure 1-3 As shown, this utility model provides a seamless wear-resistant elbow, including a bend 1. Both ends of the bend 1 are connected to straight pipes 2 via flanges 3. A fixing sleeve 4 is fixedly sleeved in the middle of the bend 1. A support rod is fixedly connected to the end wall of the fixing sleeve 4. The movable end of the support rod abuts against the end wall of the flange 3. At least two support rods are connected to one end wall of the fixing sleeve 4. The bend 1 is provided with multiple layers, which are, from the inside to the outside, a corundum ceramic layer 10, a transition layer 9, and a metal layer 11.

[0017] The bend 1 is integrally cast. Flanges 3 are installed at both ends of the bend 1, and the two ends of the bend 1 are connected to the ends of the two straight pipes 2 through the flanges 3. The bend 1 is divided into three layers, from the inside to the outside: a corundum ceramic layer 10, a transition layer 9, and a metal layer 11. It is manufactured by a self-propagating high-temperature ionization synthesis method. The corundum ceramic layer 10 is a dense corundum ceramic formed at a high temperature above 2200℃. The transition layer 9 firmly bonds the corundum ceramic layer 10 to the inner side of the metal layer 11.

[0018] A fixing sleeve 4 is welded to the middle of the bend 1, and a support rod is connected to the fixing sleeve 4 by bolts. The other end of the support rod is connected to the corresponding flange 3 to provide external support and prevent the bend 1 from deforming during the transportation of phosphorus slag.

[0019] like Figure 1 and Figure 3 As shown, a support ring 7 is fixedly connected to the movable end of the strut. The support ring 7 is fitted onto the end of the bend 1, and the end wall of the support ring 7 is in contact with the end wall of the flange 3. By fixing the support ring 7 to the end of the strut, by ensuring the support ring 7 is in contact with the end wall of the flange 3, and by providing support through the strut connected to the end walls of the fixing sleeve 4, and in conjunction with the connection between the fixing sleeve 4 and the bend 1, the strength of the bend 1 is further improved.

[0020] like Figure 3 As shown, to ensure a tight connection between the support ring 7 and the flange 3, an external support frame for the bend 1 is formed. The end wall of the support ring 7 is provided with a limiting hole for the bolt head on the flange 3 to be inserted, and the inner wall of the limiting hole is in contact with the outer wall of the bolt head.

[0021] like Figure 1 As shown, the support ring 7 is provided with stable support by a strut. The strut includes a first strut 5 and a second strut 6, the movable ends of which are fixed to the bottom and one side of the end wall of the support ring 7, respectively.

[0022] like Figure 3 As shown, to achieve a stable connection between the first support rod 5 and the second support rod 6 on the support ring 7, a connecting protrusion 8 is provided on the inner side of the support ring 7. The inner ring of the connecting protrusion 8 is attached to the outer wall of the bend 1, and both the first support rod 5 and the second support rod 6 are connected to the connecting protrusion 8. The first support rod 5 and the second support rod 6 are connected to the connecting protrusion 8 by bolts. The support ring 7 structure on the outer side of the connecting protrusion 8 is used to open hexagonal limiting holes to fit the bolt heads on the flange 3.

Claims

1. A seamless wear-resistant elbow, characterized in that: The device includes a bend (1), with straight pipes (2) connected to both ends of the bend (1) via flanges (3). A fixed sleeve (4) is fixedly fitted in the middle of the bend (1), and a support rod is fixedly connected to the end wall of the fixed sleeve (4). The movable end of the support rod abuts against the end wall of the flange (3). At least two support rods are connected to one end wall of the fixed sleeve (4). The bend (1) is provided with multiple layers, which are, from the inside to the outside, a corundum ceramic layer (10), a transition layer (9), and a metal layer (11).

2. The seamless wear-resistant elbow as described in claim 1, characterized in that: The movable end of the strut is fixedly connected to a support ring (7), which is fitted onto the end of the bend (1), and the end wall of the support ring (7) is in contact with the end wall of the flange (3).

3. The seamless wear-resistant elbow as described in claim 2, characterized in that: The end wall of the support ring (7) is provided with a limiting hole for the bolt head on the flange (3) to be inserted, and the inner wall of the limiting hole is in contact with the outer wall of the bolt head.

4. The seamless wear-resistant elbow as described in claim 2, characterized in that: The support rod includes a first support rod (5) and a second support rod (6), with the movable ends of the first support rod (5) and the second support rod (6) respectively fixed to the bottom and one side of the end wall of the support ring (7).

5. The seamless wear-resistant elbow as described in claim 4, characterized in that: The inner side of the support ring (7) is provided with a connecting protrusion (8), the inner ring of the connecting protrusion (8) is attached to the outer wall of the bend (1), and the first support rod (5) and the second support rod (6) are both connected to the connecting protrusion (8).

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