A powder collection and screening device for an atomization apparatus

Abstract

The utility model discloses a kind of powder collection screening devices of atomization equipment, it is related to metal gas atomization powder making technical field, including the cyclone powder collection system, screening powder collection system, air separation powder collection system and dust collection system connected in turn, integrated powder collection, multistage classification to the process of dust recovery, reduce the dispersion of powder in the turnover process, reduce material loss.Cyclone powder collection system includes at least two cyclone towers communicated in sequence, and the bottom of cyclone tower is connected with screening system.Air separation powder collection system includes at least two air separation towers communicated in sequence, and the bottom of air separation tower and cyclone tower is connected with material container, and the screening mechanism is matched by multistage series cyclone and air separation tower, realize the continuous classification of powder from coarse to fine, to improve the consistency of product granularity and powder collection efficiency.The outer periphery of cyclone tower is sleeved with water cooling jacket, which can prevent powder bonding and equipment overheating.Dust collection system is used to collect fine dust, which is conducive to improving working environment.

Description

Technical Field

[0001] This utility model relates to the field of metal gas atomization powder production technology, and in particular to a powder collection and sieving device for atomization equipment. Background Technology

[0002] Atomization powder preparation is the mainstream process for preparing metal powders in powder metallurgy. In existing technologies, after gas atomization powder preparation, the powder in the atomization tower must first be transferred to a cyclone dust collector for initial collection. After cooling, it is then released from below the dust collector into a transfer tank, and finally transported to a separate sieving device for particle size classification. This traditional approach separates dust collection and sieving into two independent processes, which has significant drawbacks: the powder is prone to dispersion during multiple turnovers, discharges, and transfers, increasing material loss, worsening the production environment, and leading to a cumbersome process flow and low production efficiency. Therefore, there is an urgent need for an integrated device that combines dust collection and sieving functions and reduces powder turnover. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a powder collection and sieving device for atomizing equipment, which integrates powder collection and sieving processes, reducing material loss.

[0004] A powder collection and sieving device for an atomizing equipment according to an embodiment of the present invention includes: The system comprises a cyclone dust collection system, a sieving dust collection system, an air-classifying dust collection system, and a dust collection system connected in sequence. The cyclone dust collection system includes at least two cyclone towers connected in sequence, with at least one cyclone tower having a sieving system for powder classification connected to its bottom. The outer periphery of the cyclone towers is fitted with a water-cooling jacket for cooling the powder. The air-classifying dust collection system includes at least two air-classifying towers connected in sequence, with a collection container connected to the bottom of both the air-classifying towers and the cyclone towers. The dust collection system is connected downstream of the air-classifying dust collection system for collecting fine dust.

[0005] According to an embodiment of this utility model, a powder collection and sieving device for an atomizing equipment has at least the following beneficial effects: This embodiment includes a cyclone powder collection system, a sieving powder collection system, an air-classifying powder collection system, and a dust collection system connected in sequence, integrating the process from powder collection and multi-stage grading to dust recovery, reducing powder dispersion during turnover and lowering material loss. The cyclone powder collection system includes at least two cyclone towers connected in sequence, with at least one cyclone tower having a sieving system for powder grading connected to its bottom. The air-classifying powder collection system includes at least two air-classifying towers connected in sequence, with a collection container connected to the bottom of both the air-classifying tower and the cyclone tower. Through the multi-stage series of cyclones and air-classifying towers combined with a sieving mechanism, continuous grading of powder from coarse to fine is achieved, thereby improving the consistency of product particle size and powder collection efficiency. The outer periphery of the cyclone tower is fitted with a water-cooling jacket to prevent powder adhesion and equipment overheating, ensuring stable system operation. The dust collection system is connected downstream of the air-classifying powder collection system to collect fine dust, which helps improve the working environment.

[0006] According to some embodiments of this utility model, an atomizing tower is also provided. The atomizing tower is used to generate metal powder to achieve the atomization effect on the metal material. The atomizing tower is connected to the cyclone powder collection system.

[0007] According to some embodiments of this utility model, a conveying pipe is provided between the atomizing tower and the cyclone tower, and a water-cooling jacket is provided around the outer periphery of the conveying pipe to cool the high-temperature powder and prevent the equipment from overheating or the powder from sticking together.

[0008] According to some embodiments of this utility model, the two ends of the conveying pipe are respectively connected to the bottom of the atomizing tower and the top of the cyclone tower. The conveying pipe is inclined and the axis of the conveying pipe has an inclination angle α with the horizontal plane, which satisfies: 120°≤α≤150°, which can reduce the resistance of powder conveying.

[0009] According to some embodiments of this utility model, the air classifier tower is provided with a rotatable classifying wheel. The outer circumference of the classifying wheel is provided with multiple blades, and there is a gap between two adjacent blades. When the classifying wheel rotates, the powder can enter the classifying wheel through the gap and be discharged outward along the axial direction of the classifying wheel.

[0010] According to some embodiments of this utility model, the air classifier tower is provided with a volute, which is located at the top of the classifying wheel. When the classifying wheel rotates, the powder can be discharged outward through the volute.

[0011] According to some embodiments of the present invention, the cyclone dust collection system includes a first cyclone tower and a second cyclone tower that are interconnected. The first cyclone tower is located on the upstream side and is connected to a collection tank, which is located between the first cyclone tower and the screening system.

[0012] According to some embodiments of the present invention, the screening system includes a feeder and a vibrating screen. The feeder is connected to the bottom of the receiving tank, and the vibrating screen is connected to the other end of the feeder away from the receiving tank.

[0013] According to some embodiments of this utility model, both the cyclone tower and the air classifier tower are provided with vibrating hammers on their outer periphery, and the vibrating hammers are used to remove the adhering powder.

[0014] According to some embodiments of the present invention, the receiving container also includes a receiving bucket, and the bottom of the second cyclone tower and the air separation tower are both connected to the receiving bucket, and the receiving bucket is provided with a detachable cover.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a front view of a powder collection and sieving device of an atomizing equipment according to an embodiment of the present utility model; Figure 2 This is a partial cross-sectional view of the air separator in an embodiment of this utility model; Figure 3 This is a schematic diagram of a water-cooled jacket installed on the outer periphery of the cyclone tower in an embodiment of this utility model.

[0017] Figure label: Atomizing tower 100; delivery pipe 101; water cooling jacket 102; Cyclone dust collection system 110; First cyclone tower 111; Second cyclone tower 112; Collection tank 113; Vibrating hammer 114; Tower body 115; 120 Air classifier dust collection system; 121 First air classifier tower; 122 Second air classifier tower; 123 Collection hopper; 124 Cover plate; 125 Classifying wheel; 126 Volute casing; Dust collection system 130; Fan 131; Screening system 140; feeder 141; vibrating screen 142. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 3 A powder collection and sieving device for an atomizing equipment according to an embodiment of this utility model includes an atomizing tower 100, a cyclone powder collection system 110, a sieving system 140, an air-classifying powder collection system 120, and a dust collection system 130 connected in sequence. The atomizing tower 100 uses high-pressure airflow to break up liquid metal into fine droplets, which are then condensed into solid metal powder. A conveying pipe 101 is provided between the bottom of the atomizing tower 100 and the inlet of the cyclone powder collection system 110. To optimize conveying efficiency and reduce powder settling and pressure loss within the pipe, the conveying pipe 101 is inclined, with its axis having an inclination angle α relative to the horizontal plane, satisfying: 120°≤α≤150°.

[0023] Understandably, when the inclination angle α of the conveying pipe 101 is less than 120°, the pipe is too gentle, which can easily lead to the settling, aggregation, or even blockage of coarse powder, and also affect the particle size distribution of the powder. If α > 150°, the pipe is too steep, and the sudden airflow will cause significant pressure loss and eddies, exacerbating pipe wall wear and fine powder adhesion. When the inclination angle α is set between 120° and 150°, a good balance can be achieved, providing sufficient slope to ensure smooth powder flow and prevent coarse powder deposition, while avoiding pressure loss and wear caused by sharp bends, ensuring conveying efficiency and system stability, and making the equipment layout more compact and reasonable.

[0024] Understandably, because the powder from the atomizing tower is at a high temperature, a water-cooling jacket 102 is fitted around the outer periphery of the conveying pipe 101 to prevent damage from overheating and to prevent the powder from sticking inside the pipe. Cooling water circulates inside the jacket, continuously cooling the pipe.

[0025] Understandably, after passing through the conveying pipe 101, the gas-powder mixture first enters the cyclone dust collection system 110. In this embodiment, the system adopts a two-stage series design, including a first cyclone tower 111 located upstream and a second cyclone tower 112 located downstream. This enables the step-by-step and efficient collection of powder. When the high-speed gas-powder mixture enters the first cyclone tower 111 tangentially, it creates a strong rotating airflow within the tower. Under the action of centrifugal force, most of the larger, coarser powder particles are thrown towards the tower wall. After losing kinetic energy upon collision with the tower wall, they spiral downwards along the conical tower wall under the action of gravity, eventually collecting at the bottom of the tower. To export these collected main powder particles for further processing, a collection tank 113 is connected to the powder outlet at the bottom of the first cyclone tower 111. The collection tank 113 is typically connected to the first cyclone tower 111 via a quick-release buckle, ensuring both airtightness and ease of disassembly and cleaning. Similarly, the bottom of the second cyclone tower 112 is also connected to a collection container for collecting the finer powder it captures.

[0026] Understandably, during the powder collection process, fine powder can adhere to the inner walls of the cyclone tower and air classifier tower 115 due to electrostatic or adsorption effects. Long-term accumulation can reduce powder collection efficiency and even clog the equipment. To address this issue, vibratory hammers 114 are installed on the outer peripheral walls of both the first cyclone tower 111 and the second cyclone tower 112. These vibratory hammers 114 are typically pneumatic hammers that can operate intermittently or at a set frequency. The high-frequency vibrations they generate are transmitted to the tower walls, dislodging the adhered powder and allowing it to fall normally to the collection device at the bottom of the tower.

[0027] After the powder is initially separated by the first cyclone tower 111, the airflow containing finer powder exits from the central outlet at the top of the tower and enters the second cyclone tower 112. The second cyclone tower 112 operates on the same principle as the first cyclone tower 111, primarily to capture the fine powder that "escaped" from the first stage, thereby further improving the overall powder recovery rate of the entire system. Furthermore, the airflow exiting from the top of the second cyclone tower 112 mainly contains ultrafine powder that is difficult to capture by centrifugal force.

[0028] Understandably, the screening system 140 is directly connected below the receiving tank 113 at the bottom of the first cyclone tower. The screening system 140 includes a feeder 141 and a vibrating screen 142. The inlet of the feeder 141 is connected to the bottom outlet of the receiving tank 113, and is used to convey powder to the vibrating screen 142 at a stable rate. The feeder 141 can be a screw feeder or a vibrating feeder; in this embodiment, a vibrating feeder is preferred to avoid powder jamming.

[0029] Understandably, by adjusting the vibration frequency of the feeder 141, the amount of powder entering the vibrating screen 142 per unit time can be accurately controlled, avoiding screen overload and ensuring screening effect. The vibrating screen 142 can be equipped with one or two layers of screens with different mesh sizes according to product requirements. For example, only one 200-mesh screen can be installed to separate qualified powder from coarse powder, or two layers of 200-mesh and 300-mesh screens can be installed to simultaneously obtain powders from three different particle size ranges. Under the action of the vibrating motor, the screen vibrates at high frequency. Qualified powder smaller than the screen aperture passes through the screen and falls into the powder collection box (not shown in the figure) located below the vibrating screen 142, while larger particles move along the screen surface and are discharged from the outlet, being collected separately. This online real-time screening eliminates the intermediate transfer and handling of powder in traditional processes, significantly reducing powder spillage and labor costs.

[0030] Reference Figure 3 It is understandable that the outer periphery of the cyclone tower is also fitted with a water-cooling jacket 102. Between the water-cooling jacket 102 and the tower body 115, there is a cavity for accommodating cooling water, enabling continuous and efficient forced cooling of the high-temperature powder and airflow within the tower. This effectively prevents the powder from sintering or sticking to the tower wall due to excessive temperature, significantly reducing losses caused by powder sticking to the wall and ensuring the powder's flowability and original properties. Furthermore, it avoids high equipment temperatures, which helps improve the equipment's operational stability.

[0031] Following the second cyclone tower 112, the remaining ultrafine powder in the airflow requires more precise classification. The air-classifying powder collection system 120 in this embodiment also employs a two-stage series structure, including a first air-classifying tower 121 and a second air-classifying tower 122. Each air-classifying tower is equipped with a classifying wheel 125, which is driven by a motor. Multiple axially arranged blades are evenly distributed around the outer periphery of the classifying wheel 125, forming narrow feed gaps between adjacent blades. In this embodiment, the classifying wheel 125 uses a centrifugal fan. When the classifying wheel 125 rotates, the powder can enter the inner cavity from its outer periphery and move upwards along the axial direction from the inner cavity. Furthermore, a volute 126 is provided at the top of the classifying wheel 125.

[0032] During operation, the motor drives the classifying wheel 125 to rotate at high speed. An airflow carrying ultrafine powder enters from the bottom of the air classifier tower and approaches the rotating classifying wheel 125 as it moves upwards. At this point, the larger the particle size of the powder, the stronger the centrifugal force. Only when the drag force of the airflow on the powder exceeds the centrifugal force can it be "drawn" into the hollow interior of the classifying wheel through the gaps between the blades. The powder entering the classifying wheel 125 moves axially with the airflow, entering the volute 126 from the top and finally exiting through the powder outlet on the side of the volute 126. Powder with relatively large particle sizes (or high densities) is thrown off the classifying wheel 125 because the centrifugal force is greater than the drag force, and cannot pass through the gaps. It ultimately falls back to the bottom of the air classifier tower under gravity and is collected by the collection bucket 123 connected to the bottom of the tower.

[0033] Understandably, the classifying rollers 125 of the first air classifier 121 and the second air classifier 122 rotate at different speeds. Generally, the motor speed of the second air classifier 122 is higher than that of the first air classifier 121. Thus, the first air classifier 121 is responsible for separating relatively coarse fine powder from the airflow, while the faster-rotating second air classifier 122 can be configured with a smaller cutting particle size to separate finer finished powder or to collect higher-grade ultrafine powder. The bottom of the second air classifier 122 is also connected to a collection hopper 123 to collect the separated powder. To facilitate the emptying of the collected powder, these collection hoppers 123 can be designed as open-topped and equipped with removable covers 124, which can be quickly connected and disconnected from the bottom outlet of the tower body 115 via wide clips.

[0034] Understandably, the airflow discharged from the second air separation tower 122 contains only extremely fine dust. To protect the environment and achieve complete material recovery, a dust collection system 130 is installed at the end of the unit. This system is typically a pulse dust collector, containing filter bags or cartridges. When the dust-laden airflow passes through, the dust is trapped on the surface of the filter media, while the clean gas passes through. The system periodically activates compressed air pulses to back-blow the filter media, shaking the accumulated dust to the bottom of the dust collector for collection. To ensure smooth airflow and maintain a negative pressure operating environment throughout the system, a fan 131 is also installed at the outlet of the dust collection system 130. The motor speed of the fan 131 can be adjusted via a frequency converter to control the airflow and negative pressure of the entire system, ensuring smooth and stable powder delivery from the atomizing tower to the dust collector.

[0035] In summary, this invention innovatively integrates multiple functional units, including atomization, multi-stage cyclone powder collection, online sieving, multi-stage air separation, and high-efficiency dust collection, into a coherent system, achieving full automation and integration of the entire process of metal powder production, collection, grading, and dust recovery. This design not only significantly reduces powder loss during turnover and improves the working environment, but also greatly simplifies the operation process and improves production efficiency and product particle size consistency.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A powder collection and sieving device for an atomizing equipment, characterized in that, include: The system comprises a cyclone dust collection system, a sieving dust collection system, an air-classifying dust collection system, and a dust collection system connected in sequence. The cyclone dust collection system includes at least two cyclone towers connected in sequence, wherein at least one of the cyclone towers is connected to a sieving system for powder classification at its bottom. The outer periphery of the cyclone towers is fitted with a water-cooling jacket for cooling the powder. The air-classifying dust collection system includes at least two air-classifying towers connected in sequence, and the bottom of both the air-classifying towers and the cyclone towers is connected to a collection container. The dust collection system is connected downstream of the air-classifying dust collection system for collecting fine dust.

2. The powder collection and sieving device for an atomizing equipment according to claim 1, characterized in that, It also includes an atomizing tower for generating metal powder, which is connected to the cyclone powder collection system.

3. The powder collection and sieving device for an atomizing equipment according to claim 2, characterized in that, A conveying pipe is provided between the atomizing tower and the cyclone tower, and a water-cooling jacket is fitted around the outer periphery of the conveying pipe.

4. The powder collection and sieving device for an atomizing equipment according to claim 3, characterized in that, The two ends of the conveying pipe are respectively connected to the bottom of the atomizing tower and the top of the cyclone tower. The conveying pipe is inclined and the axis of the conveying pipe has an inclination angle α with the horizontal plane, which satisfies: 120°≤α≤150°.

5. The powder collection and sieving device for an atomizing equipment according to claim 1, characterized in that, The air classifier tower is equipped with a rotatable classifying wheel. The outer circumference of the classifying wheel is provided with multiple blades, and there is a gap between two adjacent blades. When the classifying wheel rotates, the powder can enter the classifying wheel through the gap and be discharged outward along the axial direction of the classifying wheel.

6. The powder collection and sieving device for an atomizing equipment according to claim 5, characterized in that, The air classifier tower is equipped with a volute, which is located at the top of the classifying wheel. When the classifying wheel rotates, the powder can be discharged outward through the volute.

7. The powder collection and sieving device for an atomizing equipment according to claim 1, characterized in that, The cyclone dust collection system includes a first cyclone tower and a second cyclone tower that are interconnected. The first cyclone tower is located on the upstream side and is connected to a collection tank, which is located between the first cyclone tower and the screening system.

8. The powder collection and sieving device for an atomizing equipment according to claim 7, characterized in that, The screening system includes a feeder and a vibrating screen. The feeder is connected to the bottom of the receiving tank, and the vibrating screen is connected to the other end of the feeder away from the receiving tank.

9. The powder collection and sieving device for an atomizing equipment according to claim 1, characterized in that, Both the cyclone tower and the air classifier tower are equipped with vibrating hammers on their outer periphery, which are used to remove adhering powder.

10. The powder collection and sieving device for an atomizing equipment according to claim 7, characterized in that, The receiving container also includes a receiving bucket, which is connected to the bottom of both the second cyclone tower and the air separator, and the receiving bucket is provided with a removable cover.

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