Classified screening device for metal powder

Abstract

The utility model discloses a metal powder grading screening device, relates to the technical field of metal powder screening, and aims to solve the technical problem that powder is raised in the metal powder screening process, the metal powder grading screening device comprises a vibrating screen body, and the interior of the vibrating screen body is connected with a hollow shaft through a motor output shaft. A feeding port is fixedly connected to the upper surface of the vibrating screen body, an air inlet fan fixedly connected with the hollow shaft is arranged at the bottom end in the feeding port, a horn mouth is fixedly connected to the lower end of the outer surface of the hollow shaft, and a separation plate fixedly connected to the inner wall of the vibrating screen body is arranged below the horn mouth. A communicating opening formed in the outer surface of the hollow shaft is formed in the horn mouth. The vibrating screen has the advantages that an air flow channel is generated in the vibrating screen body, metal dust is prevented from rising to form a dangerous source, dust and air are separated, and the dust is conveniently collected.

Description

Technical Field

[0001] The utility model relates to the technical field of metal powder screening sieves, and more specifically to a metal powder grading and screening device. Background Art

[0002] In the powder metallurgy process, even when using powders of the same material, in order to obtain a high density of the compact, the powder must have a suitable particle size distribution. The purpose of screening is to classify raw material powders of different particle sizes into several grades with a narrower size range according to the particle size, creating conditions for adjusting the ingredients to achieve a suitable particle size distribution. Screening is usually performed using a standard mesh sieve or a rotary vibrating screen.

[0003] In the process of screening metal powder by the existing vibrating screen, due to the small size of the screened metal powder, dust may be raised during the process of adding metal powder and vibrating screening. The dust raised in the air may cause a dust explosion. In view of this, we propose a metal powder grading and screening device. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, meet practical needs, and provide a metal powder grading and screening device to solve the technical problem of powder lifting in the current metal powder screening process.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a metal powder grading and screening device, comprising a vibrating screen body, the interior of the vibrating screen body is connected to a hollow shaft through a motor output shaft, the upper surface of the vibrating screen body is fixedly connected to a feed port, the bottom end of the feed port is provided with an inlet fan fixedly connected to the hollow shaft, the lower end of the outer surface of the hollow shaft is fixedly connected to a bell mouth, an isolation plate fixedly connected to the inner wall of the vibrating screen body is provided below the bell mouth, and a connecting port opened on the outer surface of the hollow shaft is provided inside the bell mouth.

[0006] The utility model drives the inlet fan to rotate while controlling the operation of the equipment through a motor. When metal powder is put into the feed port, the inlet fan blows air into the interior of the vibration screen body to prevent the metal powder from being lifted up when it is put in. Then, under the action of the inlet fan and the turntable, the dust is evenly sprinkled around the screen inside the vibration screen body, and the air flow inside the vibration screen body rotates and flows downward along the four sides of the internal space of the vibration screen body. Then, during the continuous blowing of the inlet fan, the qualified metal dust is accelerated to be blown to the bottom of the screen, and under the action of the internal connecting port of the bell mouth, it is connected with the external space to form a stable air passage, separate the metal dust from the air, and make the dust fall to the bottom of the equipment through the isolation plate and be collected, so as to avoid the situation that dust is lifted up during the screening and feeding process.

[0007] Preferably, a turntable is fixedly connected to the upper end of the outer surface of the hollow shaft, and the turntable includes an upper plate and a connecting rod fixedly connected to the lower plate.

[0008] Preferably, a conical flow block is provided at a position inside the hollow shaft corresponding to the communication port.

[0009] Preferably, the air inlet fan is located between the upper plate and the lower plate; the air inlet fan located between the upper plate and the lower plate is convenient for sucking the raised powder downwards and for sprinkling the metal powder to improve the screening efficiency.

[0010] Preferably, a vibrating filter screen is arranged inside the vibration screen body, and the bell mouth is located below the filter screen, and the lower end of the isolation plate is a truncated cone-shaped groove with the large end facing upward and a diameter larger than the hollow shaft.

[0011] Preferably, the upper end of the hollow shaft extends above the feed port.

[0012] Preferably, the inlet fan is located below the feed port, and the diameter of the inlet fan is smaller than the diameter of the lower end of the feed port.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model drives the inlet fan to rotate while controlling the operation of the equipment through a motor. When metal powder is put into the feed port, the inlet fan blows air into the interior of the vibration screen body to prevent the metal powder from being lifted up when it is put in. Then, under the action of the inlet fan and the turntable, the dust is evenly sprinkled around the screen inside the vibration screen body, and the air flow inside the vibration screen body rotates and flows downward along the four sides of the internal space of the vibration screen body. Then, during the continuous blowing of the inlet fan, the qualified metal dust is accelerated to be blown to the bottom of the screen. After being connected with the external space under the action of the internal connecting port of the bell mouth, a stable air passage is formed to avoid the dust being lifted up due to vibration screening. At the same time, the metal dust is separated from the air so that the dust falls to the bottom of the equipment and is collected, thereby avoiding the dust being lifted up during screening and feeding.

[0015] 2. The utility model also designs a conical circulation block structure to prevent cyclones from occurring when air enters the hollow shaft through the connecting port, thereby preventing the normal release of airflow and further preventing the problem of dust being drawn into the cyclones during air circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the isolation plate structure of the utility model;

[0018] Figure 3This is a schematic diagram of the circulation block structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the turntable structure of the utility model;

[0020] Figure 5 For the utility model Figure 2 -A is an enlarged schematic diagram of the structure.

[0021] Explanation of the numbers in the figure: 1. Vibrating screen body; 2. Hollow shaft; 3. Inlet fan; 4. Turntable; 401. Upper plate; 402. Connecting rod; 403. Lower plate; 5. Feed inlet; 6. Bell mouth; 7. Connecting port; 8. Circulation block; 9. Isolation plate. DETAILED DESCRIPTION

[0022] like Figures 1 to 5 As shown, the utility model relates to a metal powder grading and screening device, comprising a vibrating screen body 1, the interior of the vibrating screen body 1 is connected with a hollow shaft 2 through a motor output shaft, the upper surface of the vibrating screen body 1 is fixedly connected with a feed port 5, the bottom end of the feed port 5 is provided with an inlet fan 3 fixedly connected to the hollow shaft 2, the lower end of the outer surface of the hollow shaft 2 is fixedly connected with a bell mouth 6, below the bell mouth 6 is provided with an isolation plate 9 fixedly connected to the inner wall of the vibrating screen body 1, and the inside of the bell mouth 6 is provided with a connecting port 7 opened on the outer surface of the hollow shaft 2; the upper end of the outer surface of the hollow shaft 2 is fixedly connected with a turntable 4, the turntable 4 includes an upper plate 401 and a connecting rod 402 fixedly connected through a lower plate 403; the powder is spread out by the rotation of the turntable 4 to improve the screening efficiency, and the air is rotated and descends along the inner space of the vibrating screen body 1, so as to realize the separation of metal dust and air in the air after adding the air passage.

[0023] In the embodiment of the utility model, a conical circulation block 8 is arranged at a position corresponding to the communication port 7 inside the hollow shaft 2; the conical circulation block 8 prevents the air from cycloning when entering the hollow shaft 2 along the communication port 7, which affects the normal release of the airflow, and prevents the cyclone from entraining dust. The air inlet fan 3 is located between the upper plate 401 and the lower plate 403; the air inlet fan 3 located between the upper plate 401 and the lower plate 403 facilitates the downward suction of the raised powder, and facilitates the falling of the metal powder to improve the screening efficiency.

[0024] In the embodiment of the utility model, a filter screen is provided inside the vibration screen body 1, and the bell mouth 6 is located below the filter screen, and the lower end of the isolation plate 9 is a truncated cone-shaped groove with the large end facing upward and a diameter greater than that of the hollow shaft 2; the bell mouth 6 located below the filter screen separates the rotating airflow and prevents dust from falling into the inside of the connecting port 7, and reduces the contact between the metal powder and the airflow after entering the lower end of the vibration screen body 1 through the truncated cone-shaped groove at the lower end of the isolation plate 9. The upper end of the hollow shaft 2 extends to the top of the feed port 5; to avoid the influence of the airflow circulation driven by the rotation of the inlet fan 3. The inlet fan 3 is located below the feed port 5, and the diameter of the inlet fan 3 is smaller than the diameter of the lower end of the feed port 5; the inlet fan 3 with a smaller diameter prevents a large amount of dust from falling directly above the inlet fan 3.

[0025] Working principle: This embodiment provides a metal powder grading and screening device. When in use, the motor is started to drive the inlet fan 3 and the turntable 4 to rotate. When the powder falls along the edge of the feed port 5, the dust is evenly sprinkled along the turntable 4, and the inlet fan 3 blows air downward to prevent the powder from being lifted when the dust is added, and the air flow inside the vibration screen body 1 rotates and flows downward along the four sides of the internal space of the vibration screen body 1. Then, during the continuous blowing of the inlet fan 3, the qualified metal dust is accelerated to be blown to the bottom of the screen. After being connected with the external space under the action of the internal connecting port 7 of the bell mouth 6, a stable air passage is formed to avoid the dust being lifted due to vibration screening, and at the same time, the metal dust is separated from the air so that the dust falls to the bottom of the equipment and is collected. At the same time, under the action of the isolation plate 9, the dust at the lower end of the vibration screen body 1 is prevented from contacting with the circulating airflow, thereby avoiding the dust being lifted during screening and feeding.

[0026] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A metal powder grading and screening device, comprising a vibrating screen body (1), characterized in that: The interior of the vibration screen body (1) is connected to a hollow shaft (2) via a motor output shaft, the upper surface of the vibration screen body (1) is fixedly connected to a feed port (5), the bottom end of the feed port (5) is provided with an inlet fan (3) fixedly connected to the hollow shaft (2), the lower end of the outer surface of the hollow shaft (2) is fixedly connected to a bell mouth (6), an isolation plate (9) fixedly connected to the inner wall of the vibration screen body (1) is provided below the bell mouth (6), and a connecting port (7) opened on the outer surface of the hollow shaft (2) is provided inside the bell mouth (6).

2. A metal powder grading and screening device according to claim 1, characterized in that: The upper end of the outer surface of the hollow shaft (2) is fixedly connected to a rotating disk (4), and the rotating disk (4) comprises an upper disk (401) and a connecting rod (402) fixedly connected to the lower disk (403).

3. A metal powder grading and screening device according to claim 1, characterized in that: A conical flow block (8) is arranged inside the hollow shaft (2) at a position corresponding to the communication port (7).

4. A metal powder grading and screening device according to claim 2, characterized in that: The air inlet fan (3) is located between the upper plate (401) and the lower plate (403).

5. The metal powder grading and screening device according to claim 1, characterized in that: A filter screen is arranged inside the vibration screen body (1), and the bell mouth (6) is located below the filter screen. The lower end of the isolation plate (9) is a truncated cone-shaped groove with the large end facing upward and a diameter greater than that of the hollow shaft (2).

6. The metal powder grading and screening device according to claim 1, characterized in that: The upper end of the hollow shaft (2) extends to above the feed port (5).

7. The metal powder grading and screening device according to claim 1, characterized in that: The inlet fan (3) is located below the feed opening (5), and the diameter of the inlet fan (3) is smaller than the diameter of the lower end of the feed opening (5).

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