A cyclone separation device for thermal spray electrically fused chromia powder

Abstract

The utility model provides a kind of cyclone separation device of electric fused chromic oxide powder for thermal spraying, including cylinder, feed pipe is set on the lateral upper position of cylinder, feed pipe is set tangentially with cylinder, first flange is installed on feed pipe, the center of first flange is equipped with first spherical surface, movable joint is equipped in first flange middle position, the utility model is equipped with movable joint with ball head part on feed pipe, cooperate the double-flange spherical surface structure fixed on cylinder, so that the angle of movable joint can be adjusted in vertical direction, so as to be able to flexibly adjust the angle of feeding according to the airflow movement characteristics of different particle size powder, effectively optimize cyclone structure, improve classification efficiency and particle size control accuracy, this structure expands the process adaptability of cyclone separator, allows user to flexibly set feeding direction according to actual classification requirement, improves the versatility and selectivity of equipment when processing different particle size powder.

Description

Technical Field

[0001] This utility model belongs to the field of powder processing technology, specifically relating to a cyclone separation device for electrofused chromium oxide powder used in thermal spraying. Background Technology

[0002] Thermal spraying is a technology commonly used for surface strengthening and functional coating preparation, and it is widely applied in metallurgy, aerospace, machinery and other fields. During the thermal spraying process, the properties of the powder material directly affect the coating quality. Fused chromium oxide powder, due to its strong wear resistance and good thermal stability, is an ideal raw material for thermal spraying. To meet the stringent requirements of the spraying process for particle size distribution, the fused chromium oxide powder usually needs to be ultra-finely processed and classified using a cyclone separator to obtain a product with stable particle size and concentrated distribution.

[0003] Existing cyclone separators mostly employ a fixed tangential feeding method, meaning the feed pipe is typically set at a fixed angle. This prevents adjustment of the airflow direction based on the particle size and distribution characteristics of the powder. This structure limits the control of airflow velocity and rotation intensity, hindering targeted classification and resulting in reduced separation efficiency. Furthermore, it fails to selectively obtain powders of other desired particle sizes. In addition, during the separation process, some fine powders tend to accumulate or adhere to the inner wall of the cylinder, requiring manual cleaning after prolonged use. This not only affects normal operation but also increases maintenance costs. Utility Model Content

[0004] This invention provides a cyclone separator for electrofused chromium oxide powder used in thermal spraying, which solves the problems mentioned in the background art, such as the inability of existing cyclone separators to perform targeted classification of powder and the easy adhesion of powder to the inner wall of the cylinder, requiring manual cleaning.

[0005] The technical solution adopted by this utility model is: a cyclone separator for electrofused chromium oxide powder for thermal spraying, including a cylinder, a feed pipe arranged on the upper side of the cylinder, the feed pipe being tangential to the cylinder, a first flange installed on the feed pipe, a first spherical surface at the center of the first flange, a movable joint at the middle of the first flange, a cavity at the center of the movable joint communicating with the inner cavity of the feed pipe, a ball head at the end of the movable joint matching the first spherical surface of the first flange, a second flange installed outside the first flange, a second spherical surface inside the second flange, and the ball head of the movable joint being movably installed in the cavity formed by the first flange and the second flange.

[0006] The ball head is provided with parallel positioning platforms on both sides, and the second flange is provided with parallel positioning surfaces on both sides of the center. The two positioning surfaces are matched with the two positioning platforms respectively to limit the horizontal swing of the movable joint.

[0007] The positioning platform has an outwardly extending stop step, and when the movable joint is rotated to its limit position, the end face of the stop step can contact the second flange.

[0008] The front end of the ball head is provided with an annular groove, and a sealing ring is installed in the annular groove.

[0009] A locking screw is installed at a radial position on the second flange. The locking screw can pass through the side wall of the second flange and abut against the outer wall of the ball head of the movable joint.

[0010] The diameter of the feed pipe gradually decreases from the direction closer to the cylinder to the direction farther away from the cylinder.

[0011] An adjustable reflux pipe is installed at the center of the upper part of the cylinder. Multiple air inlet connectors are installed at the top of the cylinder and near the edge, with the air outlets of the air inlet connectors facing the inner wall of the cylinder.

[0012] The bottom of the cylinder is provided with a discharge port.

[0013] A storage box connected to the discharge port is installed at the bottom of the cylinder.

[0014] The storage bin is equipped with a central cone with its tip pointing upwards. The central cone is located at the center of the discharge port and its top extends into the interior of the cylinder.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention features a movable joint with a ball head on the feed pipe, combined with a double-flange spherical structure fixed to the cylinder. This allows the angle of the movable joint to be adjusted vertically, enabling flexible adjustment of the feed angle according to the airflow characteristics of powders with different particle sizes. This effectively optimizes the cyclone structure, improves classification efficiency and particle size control accuracy. This structure expands the process adaptability of the cyclone separator, allowing users to flexibly set the feed direction according to actual classification needs, and enhancing the equipment's versatility and selectivity when processing powders of different particle sizes.

[0017] This invention, by setting several air inlet connectors at the top of the cylinder, can connect to a high-pressure gas source. By controlling the airflow to blow along the inner wall of the cylinder, it can effectively remove fine powder adhering to the side wall of the cylinder, prevent powder accumulation, reduce the frequency of manual maintenance, and improve the cleaning efficiency and continuous operation capability of the equipment. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the present invention;

[0019] Figure 2 This is a partial perspective view of the cylindrical body of this utility model;

[0020] Figure 3 This is a partial cross-sectional view of the present invention;

[0021] Figure 4 This is an exploded view showing the connection between the first flange, the second flange, and the movable joint of this utility model.

[0022] Figure 5 This is a perspective view of the movable joint of this utility model;

[0023] Figure 6 This is a perspective view of the second flange of this utility model.

[0024] in:

[0025] 1. Cylinder; 101. Discharge port; 102. Feed pipe; 2. Air inlet connector; 3. Return pipe; 4. First flange; 401. First spherical surface; 5. Second flange; 501. Second spherical surface; 502. Positioning surface; 6. Movable connector; 601. Ball head; 602. Threaded connection; 603. Positioning platform; 604. Stop step; 605. Annular groove; 606. Cavity; 7. Sealing ring; 8. Locking screw; 9. Central cone; 10. Connecting rod; 11. Storage box. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] As shown in the figure, a cyclone separator for electrofused chromium oxide powder for thermal spraying includes a cylinder 1. In this example, the cylinder 1 includes an upper cylindrical section and a lower conical section. The conical section is designed to effectively guide the powder to converge at the bottom outlet 101 through its contraction structure, thereby preventing the powder from spreading, stagnating, or being carried out by the airflow below the cylinder 1.

[0028] A feed pipe 102 is provided on the upper side of the cylinder 1. The feed pipe 102 is tangential to the cylinder 1. A first flange 4 is installed on the feed pipe 102. A first spherical surface 401 is provided at the center of the first flange 4. A movable joint 6 is provided in the middle of the first flange. One end of the movable joint 6 is provided with a threaded connection part 602. The external conveying medium is connected to the pipeline through the threaded connection to ensure that the medium can enter the feed pipe 102 stably and in a sealed manner from the external pipeline, so as to realize the smooth conveying of powder. The movable joint 6 has a cavity 606 at its center that communicates with the inner cavity of the feed pipe 102. The end of the movable joint 6 has a ball head 601, which matches the first spherical surface 401 of the first flange. A second flange 5 is installed on the outside of the first flange 4. The second flange 5 has a second spherical surface 501 inside. The ball head 601 of the movable joint 6 is movably installed in the cavity 606 formed by the first flange 4 and the second flange 5. The second flange 5 is fixed to the first flange 4 by bolts. The first flange 4 is fixed to the port of the feed pipe 102 by bolts to achieve a fixed connection. The second flange 5 is mainly used to restrict the detachment of the movable joint 6, so that the ball head 601 only has the freedom of rotation in the cavity 606 formed by the first flange 4 and the second flange 5.

[0029] The ball head 601 has parallel positioning platforms 603 on both sides, and the second flange 5 has parallel positioning surfaces 502 on both sides of its center. The two positioning surfaces 502 are matched with the two positioning platforms 603 respectively to limit the horizontal swing of the movable joint 6. In this example, when the second flange 5 is assembled, the two positioning surfaces 502 on it are set in a direction perpendicular to the horizontal plane, which cooperates with the positioning platforms 603 on both sides of the ball head 601 to limit the horizontal swing of the movable joint 6, allowing it to be adjusted only in the vertical direction. In this way, it can be ensured that the feeding direction is always along the tangential direction of the cylinder 1, which meets the requirements for tangential airflow entry during cyclone separation, thereby ensuring separation efficiency and stability.

[0030] The positioning platform 603 has an outwardly extending stop step 604. When the movable joint 6 rotates to its limit position, the end face of the stop step 604 can contact the second flange 5, mainly used to limit the swing range of the movable joint 6 in the vertical direction. In addition, the structure of the stop step 604 on the positioning platform 603, and in this example, the outer wall shape of the stop step 604 matches the spherical size of the ball head 601, can be used to set an annular groove 605 at the front end of the ball head 601, so as to meet the requirement of opening an annular groove 605 at the front end of the ball head 601, thereby installing a sealing ring 7 in the annular groove 605, so that during the angle adjustment process, the sealing ring 7 can form a sealing effect between the ball head 601 and the first spherical surface 401.

[0031] A locking screw 8 is installed at the radial position of the second flange 5. The locking screw 8 can pass through the side wall of the second flange 5 and abut against the outer wall of the ball head 601 of the movable joint 6. It is used to fix the movable joint 6 by the locking screw 8 after the angle of the movable joint 6 is adjusted to a suitable position.

[0032] The diameter of the feed pipe 102 gradually decreases from the direction close to the cylinder 1 to the direction away from the cylinder 1. This setting can help compensate for the angle difference caused by the axis offset when the movable joint 6 is adjusted, thereby avoiding the feed direction from deviating from the ideal tangential trajectory and ensuring that the airflow and powder can still be smoothly and stably introduced into the inner cavity of the cyclone separator at different angles.

[0033] An adjustable reflux pipe 3 is installed at the center of the upper part of the cylinder 1. The reflux pipe 3 can be installed at the center of the cylinder 1 by means of a threaded connection. The extraction height of the reflux airflow can be flexibly adjusted according to the movement characteristics of powders of different particle sizes in the cylinder 1, thereby optimizing the airflow structure of the separation area and improving the particle classification efficiency and separation accuracy.

[0034] Multiple air inlet connectors 2 are installed at the top and near the edge of the cylinder 1. The air inlet connectors 2 are evenly distributed around the center of the cylinder 1, and the air outlet of the air inlet connector 2 faces the inner wall of the cylinder 1. They can be connected to a high-pressure air source and use high-speed airflow to sweep along the inner wall of the cylinder 1 to effectively remove fine powder adhering to the inner wall, reduce powder accumulation, replace manual cleaning, and improve the continuity of equipment operation.

[0035] The bottom of the cylinder 1 is provided with a discharge port 101, and a storage box 11 connected to the discharge port 101 is installed at the bottom of the cylinder 1. This storage box can be used to collect the separated particulate material and prevent the material from leaking out directly.

[0036] The storage box 11 is equipped with a central cone 9 with its tip pointing upwards. The central cone 9 is connected to the storage box 11 by connecting rods 10 that are evenly distributed in the circumferential direction below. The central cone 9 is located at the center of the discharge port 101 and its top extends into the interior of the cylinder 1. This can change the lower airflow path, prevent vortex backflow, reduce the secondary carry-in of separated particles into the return airflow, and improve separation purity and efficiency.

[0037] During operation, the gas-solid mixture containing chromium oxide powder is transported to the feed pipe 102 through an external pipeline and enters the cylinder 1 at high speed tangentially. The feed direction can be precisely controlled according to requirements using the adjustable joint 6, ensuring tangential entry into the cyclone flow field. After entering the cylinder 1, the airflow forms a high-speed rotating vortex flow within the cylindrical section of the cylinder 1. Under the action of centrifugal force and gravity, the powder gradually moves downwards towards the cylinder wall and is guided to the bottom outlet 101 by the conical section's contraction structure. Coarse particles slide along the inner wall of the cylinder 1 into the bottom storage bin 11, while fine powder rises along the central area with part of the airflow to the top of the cylinder 1 and is carried out by the return pipe 3. The height of the return pipe 3 is adjustable, allowing for flexible control of the return position according to the powder particle size, thereby improving classification efficiency. The air inlet joint 2 at the top of the cylinder 1 provides high-pressure airflow to sweep along the inner wall, effectively preventing fine powder adhesion.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cyclone separator for electrofused chromium oxide powder used in thermal spraying, characterized in that, The device includes a cylinder body, a feed pipe located on the upper side of the cylinder body, the feed pipe being tangential to the cylinder body, a first flange mounted on the feed pipe, a first spherical surface at the center of the first flange, a movable joint located in the middle of the first flange, a cavity at the center of the movable joint communicating with the inner cavity of the feed pipe, a ball head at the end of the movable joint matching the first spherical surface of the first flange, a second flange mounted on the outside of the first flange, a second spherical surface inside the second flange, and the ball head of the movable joint being movably mounted within the cavity formed by the first flange and the second flange.

2. The cyclone separator for fused chromium oxide powder for thermal spraying according to claim 1, characterized in that, The ball head has parallel positioning platforms on both sides, and the second flange has parallel positioning surfaces on both sides of the center. The two positioning surfaces are matched with the two positioning platforms respectively to limit the horizontal swing of the movable joint.

3. The cyclone separator for fused chromium oxide powder used in thermal spraying according to claim 2, characterized in that, The positioning platform has an outwardly extending stop step, and when the movable joint is rotated to its limit position, the end face of the stop step can contact the second flange.

4. The cyclone separator for fused chromium oxide powder for thermal spraying according to claim 1, characterized in that, The front end of the ball head is provided with an annular groove, and a sealing ring is installed in the annular groove.

5. A cyclone separator for electrofused chromium oxide powder for thermal spraying according to claim 1, characterized in that, A locking screw is installed at a radial position on the second flange. The locking screw can pass through the side wall of the second flange and abut against the outer wall of the ball head of the movable joint.

6. The cyclone separator for fused chromium oxide powder for thermal spraying according to claim 1, characterized in that, The diameter of the feed pipe gradually decreases from the direction closer to the cylinder to the direction farther away from the cylinder.

7. A cyclone separator for electrofused chromium oxide powder for thermal spraying according to claim 1, characterized in that, An adjustable reflux pipe is installed at the center of the top of the cylinder. Multiple air inlet connectors are installed at the top of the cylinder and near the edge, with the air outlets of the air inlet connectors facing the inner wall of the cylinder.

8. A cyclone separator for fused chromium oxide powder for thermal spraying according to claim 1, characterized in that, The bottom of the cylinder is equipped with a discharge port.

9. A cyclone separator for electrofused chromium oxide powder for thermal spraying according to claim 8, characterized in that, A storage bin connected to the discharge port is installed at the bottom of the cylinder.

10. A cyclone separator for fused chromium oxide powder for thermal spraying according to claim 9, characterized in that, The storage bin is equipped with a central cone with its tip pointing upwards. The central cone is located at the center of the discharge port and its top extends into the interior of the cylinder.

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