A wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles

Abstract

The application discloses a kind of high-purity alumina particle abrasion-resistant buffer elbow structures for pneumatic conveying, it relates to the field of application of pneumatic conveying equipment, including first connecting pipe and second connecting pipe, first connecting pipe connects the feeding group of pneumatic conveying equipment, second connecting pipe connects the discharging group of pneumatic conveying equipment, it is communicated between the first connecting pipe and second connecting pipe by setting first abrasion-resistant elbow, third connecting pipe and first abrasion-resistant elbow group, first abrasion-resistant elbow group is by spherical buffer pipe, second abrasion-resistant elbow, first bus pipe composition.The application can slow down the effect of material by setting spherical cavity in front of pipe elbow, when airflow carries material into spherical cavity, space (cross-sectional area) expands, airflow is dispersed, short time reduces the force of airflow on material, so that the speed of material entering elbow is weakened, and impact force is reduced.

Description

Technical Field

[0001] This invention relates to the field of pneumatic conveying equipment, specifically a wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles. Background Technology

[0002] A pneumatic conveyor is a device that uses the kinetic energy of airflow to transport powdery or granular bulk materials in a closed pipeline. It belongs to continuous conveying machinery and mainly includes an air source, conveying pipeline, material feeding device, and separation and dust removal device.

[0003] Air supply equipment includes: negative pressure suction: vacuum pump, Roots blower, centrifugal blower (extracting air and creating negative pressure in the pipe); positive pressure delivery: Roots blower, air compressor (pressuring air into the pipeline). The feeding device includes: a suction nozzle: a suction type that is inserted into the material pile, and air and materials are sucked into the pipe together; and a cone-shaped hopper: the packaging bag is opened, and the staff manually feeds the material. Pipelines include straight pipes and bends, with bends being the most susceptible to wear. The separation and dust removal device can be a bag filter, which separates gas and material.

[0004] The conveying pipeline is laid according to the actual use scenario, with the purpose of transporting materials from one location to another. If there is a height difference between the two locations, the conveying pipeline is usually spliced ​​together with horizontal straight pipes, vertical straight pipes, and elbows. Alumina particles have a Mohs hardness of approximately 9, which is extremely hard and belongs to natural abrasives. After being accelerated by airflow, the airflow is constrained by the inner wall of the pipeline and can turn freely. However, the alumina particles are relatively larger in mass, and due to inertia, they cannot turn in time and will cause a violent impact on the bend of the pipeline, eventually causing the pipeline to break. Therefore, in practical applications, wear-resistant elbows can be installed at the bends of the pipeline to improve the service life of the pipeline. For example, large-radius elbows have a gentle bend and a large radius, which guide the flow of materials and reduce the direct impact and wear of materials on the pipe wall. In the application of pneumatic conveying equipment, wear-resistant elbows still need to be improved to further improve the service life of the pipeline and reduce the risk of downtime. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles, so as to solve the technical problems mentioned in the background above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles, comprising a first connecting pipe and a second connecting pipe. The first connecting pipe is connected to the feed group of the pneumatic conveying equipment, and the second connecting pipe is connected to the discharge group of the pneumatic conveying equipment. The first connecting pipe and the second connecting pipe are connected by a first wear-resistant elbow, a third connecting pipe, and a first wear-resistant elbow group. The first wear-resistant elbow group consists of a spherical buffer pipe, a second wear-resistant elbow, and a first manifold. The spherical buffer pipe includes a spherical cavity, and the bottom of the spherical cavity is provided with... It has a feed inlet, which is connected to a third connecting pipe. A main flow pipe is set at the top of the feed inlet, and a branch pipe is set on one side of the main flow pipe. The second wear-resistant elbow includes a large arc pipe and a sedimentation chamber. One end of the large arc pipe is connected to the main flow pipe. The first manifold includes a first main pipe, which is connected to the other end of the large arc pipe. A first branch pipe is set at the bottom of the first main pipe, which is connected to the branch pipe. The connection between the first main pipe and the first branch pipe is set as an expansion chamber. A first discharge port is set at the end of the first main pipe, and the first discharge port is connected to a second connecting pipe.

[0007] By adopting the above technical solution, a spherical cavity is set on the front side of the pipe bend, which can slow down the material. When the airflow carries the material into the spherical cavity, the space (cross-sectional area) expands, the airflow is dispersed, and the force of the airflow on the material is reduced in a short time, which weakens the material velocity at the bend and reduces the impact force. In addition, a diversion pipe is set on the side of the spherical cavity close to the main pipe, allowing some material to actively enter the diversion pipe with the airflow. This can reduce the amount of material entering the bend. In other words, the setting of the spherical cavity and the diversion pipe can reduce both the amount of material entering the bend and the velocity of the material, thereby reducing the impact force and the wear of the bend.

[0008] The present invention is further configured such that an alumina ceramic sheet is pasted inside the spherical cavity.

[0009] Preferably, the spherical buffer tube is made of two hemispheres welded together. Before welding, honeycomb ceramic sheets are pasted inside the tube. The ceramic sheets have a high Mohs hardness, which makes the inner wall of the spherical cavity more wear-resistant.

[0010] The present invention is further configured such that the feed inlet, the main flow pipe and the sedimentation chamber are on the same axis.

[0011] Preferably, it can reduce resistance and make material conveying smoother.

[0012] The present invention is further configured such that the shunt pipe and the first branch pipe are on the same axis, and the diameters of the shunt pipe and the first branch pipe are smaller than the main pipe, and the diameter of the expansion cavity is larger than the first branch pipe and the shunt pipe.

[0013] Preferably, the diameter of the main channel is larger than that of the sub-channel, so that most of the material enters the active sleeve under the action of inertia, and a small part enters the sub-channel, thus avoiding the same or similar material volume when the two converge, which would lead to a large interference effect.

[0014] The present invention is further configured such that the first connecting pipe and the second connecting pipe are connected by a first wear-resistant elbow, a third connecting pipe and a second wear-resistant elbow group, wherein the second wear-resistant elbow group consists of a spherical buffer pipe, a second wear-resistant elbow and a second manifold.

[0015] Preferably, the second wear-resistant elbow group is a further improvement on the first wear-resistant elbow group, which reduces the interference effect when materials converge.

[0016] The present invention is further configured such that the second manifold includes a second main pipe, one end of which is connected to a large arc pipe, a second branch pipe is provided at the bottom of the second main pipe, the second branch pipe is connected to a branch pipe, and the connection between the second main pipe and the second branch pipe is configured as an arc-shaped cavity, and a second discharge port is provided at the end of the second main pipe, the second discharge port being connected to a second connecting pipe.

[0017] Preferably, by setting an arc-shaped cavity at the confluence point for diversion and reducing the confluence angle, the mutual interference between the mainstream material and the diverted material can be reduced.

[0018] The present invention is further configured such that a gentle slope reinforcement layer is provided inside the second main pipe above the bend of the arc-shaped cavity.

[0019] Preferably, by setting a gentle slope reinforcement layer, wear resistance can be achieved by increasing the thickness of the arc cavity, and the mainstream material can be lifted, causing the confluence point to move backward and further reducing the confluence angle.

[0020] The present invention is further configured such that the installation connection between multiple sets of pipe sections is a flange connection.

[0021] As a preferred option, flange connections are used to ensure the strength of the pipeline and to facilitate disassembly and maintenance.

[0022] In summary, the present invention has the following main beneficial effects: This invention utilizes a spherical cavity located at the front of a pipe bend to slow down the material flow. When the airflow carries the material into the spherical cavity, the space (cross-sectional area) expands, dispersing the airflow and temporarily reducing the force exerted by the airflow on the material. This weakens the material velocity at the bend, reducing the impact force. Furthermore, a diversion pipe is positioned laterally near the main pipe within the spherical cavity, allowing some material to actively enter the diversion pipe with the airflow. This further reduces the amount of material entering the bend. In other words, the combination of the spherical cavity and the diversion pipe reduces both the amount of material entering the bend and its velocity, thereby reducing both the impact force and the wear on the bend.

[0023] This invention features a wear-resistant elbow with a sedimentation space, allowing materials to actively fill the sedimentation space under inertia. This means that subsequent material impacts the material within the sedimentation space, creating a material buffer layer and thus achieving the wear-resistant effect of the elbow.

[0024] This invention features a manifold, a wear-resistant elbow, and a branch pipe connection. The main pipe of the manifold is connected to the wear-resistant elbow as the main pipe for conveying materials. The branch pipe of the manifold is connected to the branch pipe of the spherical cavity as the secondary pipe for conveying materials, which serves to distribute the materials and reduce the amount of material entering the elbow, thereby increasing the protection of the wear-resistant elbow. However, when some materials are output along the branch pipe, they will still impact the inner wall of the pipe in the output direction of the branch pipe, i.e., the inner wall of the main pipe, causing wear. But at this time, the material led out from the wear-resistant elbow to the main pipe will merge with the material output from the branch pipe. The amount of mainstream material is greater than the amount of branch material, forming a dynamic material pad, which compensates for the shortcomings of the branch pipe setting.

[0025] This invention improves the wear resistance of the manifold by setting a gentle slope reinforcement layer inside the manifold, and reduces the flow velocity interference when the mainstream and diverted materials converge. If the confluence angle of the diverted and mainstream materials is not appropriate (e.g., perpendicular to each other), it will not only increase the risk of wear, but also obstruct the flow of the mainstream material, affecting the conveying efficiency of the pneumatic conveyor. The gentle slope reinforcement layer is located above the junction of the main pipe and the diverted pipe. To reduce the interference when the mainstream and diverted materials converge, their flow directions should be as parallel and tangent as possible. Therefore, an arc-shaped cavity is set in the diverted pipe to guide the flow direction of the material. Although the arc structure has the function of guiding and changing the direction of flow, the essence of the arc structure is to use the arc-shaped inner wall of the pipe to constrain the flow of the material. Therefore, the wear of the arc-shaped pipe is greater than that of the straight pipe. Figure 9As shown, the endpoint of the arc-shaped cavity is too short (distinguishing between the blank triangular areas in the attached diagram), resulting in insufficient ability to change the flow direction of the diverted material. If the endpoint of the arc-shaped cavity extends to make the diverted material tangent to the mainstream material, the endpoint will be particularly thin, making it prone to wear-through. Of course, the strength can be increased by thickening it downwards, as shown in the attached diagram. Figure 10 As shown, increasing the thickness downwards increases the curvature of the arc, which means increasing the adhesion area for material impact. Over time, this makes it more prone to wear. In other words, the adhesion area... Figure 9 In the arc-shaped cavity shown, the endpoint of the arc-shaped cavity is extended as far as possible to have sufficient guiding effect, and then a thickening treatment is performed on it. For example, in this application, a gentle slope reinforcement layer is set above the top of the arc-shaped cavity. This not only increases the thickness of the local area, preventing it from being easily worn through, but also does not cause changes in the length and curvature of the arc-shaped cavity. Furthermore, due to the effect of the gentle slope, the lower layer of the mainstream material will locally form empty vortices when it encounters the gentle slope, further reducing the mutual interference. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the transport pipeline of the present invention; Figure 3 This is a schematic diagram of the first wear-resistant elbow assembly of the present invention; Figure 4 This is a cross-sectional view of the first wear-resistant elbow assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the first wear-resistant elbow assembly of the present invention; Figure 6 This is a schematic diagram of the second wear-resistant elbow assembly of the present invention; Figure 7 This is a schematic diagram of the internal structure of the second wear-resistant elbow assembly of the present invention; Figure 8 This is a diagram illustrating the flow direction of the main material and the diverted material in this invention; Figure 9 This is a demonstration diagram of the invention without a gentle slope reinforcement layer; Figure 10 This is a demonstration diagram showing the thickening of the arc-shaped cavity without the addition of a gentle slope reinforcement layer in this invention.

[0027] Explanation of reference numerals in the attached figures: 1. First connecting pipe; 2. Second connecting pipe; 3. First wear-resistant elbow; 4. Third connecting pipe; 5. First wear-resistant elbow assembly; 6. Spherical buffer pipe; 601. Spherical cavity; 602. Feed inlet; 603. Main stream pipe; 604. Diversion pipe; 7. Second wear-resistant elbow; 701. Large arc pipe; 702. Sedimentation cavity; 8. First manifold; 801. First main pipe; 802. First branch pipe; 803. Expansion cavity; 804. First discharge port; 9. Second manifold; 901. Second main pipe; 902. Second branch pipe; 903. Arc cavity; 904. Second discharge port; 905. Sloping reinforcement layer. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The embodiments of the present invention will now be described.

[0030] Example 1: Please refer to Figure 1 - Figure 5 A wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles includes a first connecting pipe 1 and a second connecting pipe 2. The first connecting pipe 1 is connected to the feeding group of the pneumatic conveying equipment, and the second connecting pipe 2 is connected to the discharging group of the pneumatic conveying equipment. Alumina material is fed into the feeding group and moves along the pipe under the conveying of the blower to reach the discharging group. The first connecting pipe 1 and the second connecting pipe 2 are connected by a first wear-resistant elbow 3, a third connecting pipe 4, and a first wear-resistant elbow group 5. The first wear-resistant elbow group 5 consists of a spherical buffer pipe 6, a second wear-resistant elbow 7, and a first manifold 8. The spherical buffer pipe 6 includes a spherical cavity 601, which has a slowing effect. The bottom of the spherical cavity 601 is provided with a feed inlet 602, which is connected to the third connecting pipe 4. The top of the feed inlet 602 is provided with a main pipe 603, and a branch pipe 604 is provided on one side of the main pipe 603. The second wear-resistant elbow 7 includes a large arc pipe 701 and a sedimentation chamber 702. One end of the large arc pipe 701 is connected to the main pipe 603. The first manifold 8 includes a first main pipe 801, which is connected to the other end of the large arc pipe 701. The bottom of the first main pipe 801 is provided with a first branch pipe 802, which is connected to the branch pipe 604. The connection between the first main pipe 801 and the first branch pipe 802 is provided with an expansion chamber 803. The end of the first main pipe 801 is provided with a first discharge port 804, which is connected to the second connecting pipe 2. The installation connection between multiple sets of pipe sections is a flange connection.

[0031] Please refer to the above embodiments for further details. Figure 3 - Figure 5 The interior of the spherical cavity 601 is bonded with alumina ceramic sheets. The spherical buffer tube 6 is made of two hemispheres welded together. Before welding, honeycomb ceramic sheets are bonded to its interior. The ceramic sheets have a high Mohs hardness, which makes the inner wall of the spherical cavity 601 more wear-resistant.

[0032] Please refer to the above embodiments for further details. Figure 4 and Figure 5 The feed inlet 602, the main pipe 603, and the sedimentation chamber 702 are on the same axis, which can reduce the generation of resistance and make the material conveying smoother.

[0033] Please refer to the above embodiments for further details. Figure 4 The diversion pipe 604 and the first branch pipe 802 are on the same axis, and the diameters of the diversion pipe 604 and the first branch pipe 802 are smaller than the main pipe 603. The diameter of the expansion cavity 803 is larger than the first branch pipe 802 and the diversion pipe 604. The diameter of the main channel is larger than that of the branch channel, so that most of the material enters the main channel under the action of inertia and a small part enters the branch channel. This avoids the two channels from having the same or similar amount of material when they merge, which would cause a large interference effect.

[0034] Example 2: Please refer to Figure 6 - Figure 10 The first connecting pipe 1 and the second connecting pipe 2 are connected by a first wear-resistant elbow 3, a third connecting pipe 4 and a second wear-resistant elbow group. The first wear-resistant elbow group 5 is further improved to reduce the interference effect when materials converge. The second wear-resistant elbow group consists of a spherical buffer pipe 6, a second wear-resistant elbow 7 and a second confluence pipe 9. The second confluence pipe 9 includes a second main pipe 901, one end of which is connected to a large arc pipe 701. A second branch pipe 902 is provided at the bottom of the second main pipe 901. The second branch pipe 902 is connected to a branch pipe 604, and the connection between the second main pipe 901 and the second branch pipe 902 is set as an arc cavity 903. A second discharge port 904 is provided at the end of the second main pipe 901. The second discharge port 904 is connected to the second connecting pipe 2. The arc cavity 903 at the confluence is used for flow guidance, reducing the confluence angle and reducing the mutual interference between the mainstream material and the branch material.

[0035] Please refer to the above embodiments for further details. Figure 6 - Figure 8 Inside the second main pipe 901, above the bend of the arc cavity 903, there is a gentle slope reinforcement layer 905. By setting the gentle slope reinforcement layer 905, wear resistance can be achieved by increasing the thickness of the arc cavity 903, and the mainstream material can be lifted, causing the confluence point to move backward and further reducing the confluence angle.

[0036] In practical operation, the present invention comprises a pneumatic conveying device consisting of a feeding group, a discharging group, and an intermediate pipeline. The feeding group can be a conical hopper with a Roots positive pressure blower installed on one side. The discharging group can be a discharge cylinder and a bag filter with a Roots negative pressure blower installed on one side. In other words, in the pipeline of the pneumatic conveying device, alumina material is pushed by positive pressure airflow and pulled by negative pressure airflow. When the airflow moves, it accelerates the alumina material in the pipeline. The first wear-resistant elbow 3 and the second wear-resistant elbow 7 in this application have the same structure, only the arrangement and angle are different.

[0037] In Embodiment 1, when material enters the feed inlet 602 from the third connecting pipe 4 and reaches the spherical cavity 601, the increased internal space (i.e., increased cross-sectional area) of the spherical cavity 601 causes a temporary decrease in airflow velocity, reducing the drag force on the material particles. The airflow diffuses within the spherical cavity 601, and most of the material, due to inertia, directly flows into the main flow pipe 603. This means the velocity of the material entering the second wear-resistant elbow 7 is lower than that of the straight pipe section, and the amount of material is also reduced, thus reducing wear on the second wear-resistant elbow 7. A small amount of material follows the airflow into the diversion pipe 604, while the material entering the main flow pipe 603 continues to move along the axis into the sedimentation chamber 702. When the sedimentation chamber 702 is filled with alumina... During material flow, subsequent material entering the chamber will impact the material in the settling chamber 702, forming a material buffer pad. Then, the material is discharged from the horizontal end outlet of the large arc pipe 701 into the first main pipe 801, while the material in the branch pipe 604 will enter the first branch pipe 802. When it enters the expansion chamber 803, due to the increase in cross-sectional area, the drag force of the gas on the particles weakens, and the material has no new power input. Under the action of resistance and gravity, the absolute velocity gradually decreases and becomes less than the material velocity in the upstream straight pipe. At this time, the mainstream material in the first main pipe 801 and the branch material in the expansion chamber 803 merge at an inclined angle. The material in the first main pipe 801 forms a dynamic material buffer pad on the material in the expansion chamber 803.

[0038] In Embodiment 2, when the mainstream material in the first main pipe 801 and the diverted material in the expansion cavity 803 converge, the different confluence angles will cause mutual interference, thereby reducing the overall conveying efficiency. Therefore, in Embodiment 2, an arc-shaped cavity 903 is provided to guide the discharge direction of the diverted material, reducing the angle between the mainstream material and the diverted material and reducing the interference effect. However, the arc-shaped structure itself is more prone to wear than a straight pipe. Therefore, a gentle slope reinforcement layer 905 is provided above the arc-shaped cavity 903, that is, the service life of the equipment is improved by increasing the thickness. The gentle slope reinforcement layer 905 allows the material in the second main pipe 901 to avoid obstacles. That is, when the material in the second main pipe 901 encounters the gentle slope reinforcement layer 905 while being transported along the axis, the material locally deflects upward in an arc, creating a gap at the end of the gentle slope reinforcement layer 905. This allows the confluence point of the mainstream material and the diverted material to extend forward. Without the lifting effect of the gentle slope reinforcement layer 905, the mainstream material and the diverted material would converge at the starting point. After the confluence point extends forward, the material drawn out from the arc cavity 903 will further reduce the confluence angle under the action of gravity and resistance, thus reducing the interference effect.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles, comprising a first connecting pipe (1) and a second connecting pipe (2), wherein the first connecting pipe (1) is connected to the feed group of the pneumatic conveying equipment, and the second connecting pipe (2) is connected to the discharge group of the pneumatic conveying equipment, wherein the feed group and the discharge group are conveyed by a pipeline, characterized in that: The pipeline includes a first connecting pipe (1) and a second connecting pipe (2). The first connecting pipe (1) and the second connecting pipe (2) are connected by a first wear-resistant elbow (3), a third connecting pipe (4), and a first wear-resistant elbow group (5). The first wear-resistant elbow group (5) consists of a spherical buffer pipe (6), a second wear-resistant elbow (7), and a first manifold (8). The spherical buffer pipe (6) includes a spherical cavity (601). The bottom of the spherical cavity (601) is provided with an inlet (602). The inlet (602) is connected to the third connecting pipe (4). The top of the inlet (602) is provided with a main flow pipe (603). A branch pipe (604) is provided on one side of the main flow pipe (603). The second wear-resistant elbow group (8) is connected to the third connecting pipe (4). The grinding elbow (7) includes a large arc pipe (701) and a sedimentation chamber (702). One end of the large arc pipe (701) is connected to the main pipe (603). The first manifold (8) includes a first main pipe (801). The first main pipe (801) is connected to the other end of the large arc pipe (701). A first branch pipe (802) is provided at the bottom of the first main pipe (801). The first branch pipe (802) is connected to the branch pipe (604). The connection between the first main pipe (801) and the first branch pipe (802) is set as an expansion chamber (803). A first discharge port (804) is provided at the end of the first main pipe (801). The first discharge port (804) is connected to the second connecting pipe (2).

2. The wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles according to claim 1, characterized in that: An alumina ceramic sheet is pasted inside the spherical cavity (601).

3. The wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles according to claim 2, characterized in that: The feed inlet (602), the main pipe (603), and the sedimentation chamber (702) are on the same axis.

4. The wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles according to claim 3, characterized in that: The shunt pipe (604) and the first branch pipe (802) are on the same axis, and the diameters of the shunt pipe (604) and the first branch pipe (802) are smaller than the main pipe (603), and the diameter of the expansion cavity (803) is larger than the first branch pipe (802) and the shunt pipe (604).

5. The wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles according to claim 1, characterized in that: The first connecting pipe (1) and the second connecting pipe (2) are connected by a first wear-resistant elbow (3), a third connecting pipe (4) and a second wear-resistant elbow group. The second wear-resistant elbow group consists of a spherical buffer pipe (6), a second wear-resistant elbow (7) and a second manifold (9).

6. The wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles according to claim 5, characterized in that: The second manifold (9) includes a second main pipe (901), one end of which is connected to a large arc pipe (701). A second branch pipe (902) is provided at the bottom of the second main pipe (901), which is connected to a branch pipe (604). The connection between the second main pipe (901) and the second branch pipe (902) is set as an arc cavity (903). A second outlet (904) is provided at the end of the second main pipe (901), which is connected to a second connecting pipe (2).

7. The wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles according to claim 6, characterized in that: The interior of the second main pipe (901) is provided with a gentle slope reinforcement layer (905) above the bend of the arc cavity (903).

8. The wear-resistant buffer elbow structure for pneumatic conveying of high-purity alumina particles according to claim 1, characterized in that: All installation connections between multiple pipe sections are flange connections.

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