A metal powder vibration screening and collection device and its usage method

Abstract

A metal powder vibration screening and collecting device and its usage method of the present invention disclose a device that intermittently blows air into an inner screening cylinder through an air inlet hose, blows the accumulated metal powder towards a plurality of screening plates, and cooperates with the inner screening cylinder through a vibration motor to vibrate and screen metal powders of different particle sizes, which can avoid the complete blockage of the screening plates and shorten the screening time. It is characterized by being composed of a main body component and a screening component. The main body component is composed of an outer collecting cylinder, a reinforcing spring, a supporting spring, and an operation door. An installation groove is opened on the side wall of the outer collecting cylinder, and the operation door is detachably placed in the installation groove. The outer collecting cylinder is of a cylindrical structure. The diameter of the outer collecting cylinder remains unchanged from the bottom of the cylinder to three-quarters of the height, and gradually decreases from three-quarters of the height to the top of the cylinder to form a supporting part. The reinforcing spring is placed inside the outer collecting cylinder, and one end of the reinforcing spring is connected to the inner wall of the outer collecting cylinder.

Description

Technical Field

[0001] A vibrating screening and collecting device for metal powder and its using method of the present invention relate to a device and its using method capable of vibrating, screening and collecting metal powder, belonging to the technical field of metal powder processing. In particular, it relates to a device that intermittently blows air into an inner screening cylinder to disperse the accumulated metal powder, and vibrates and screens metal powder of different particle sizes through multiple screening plates, avoiding complete blockage of the screening plates and shortening the screening time at the same time. Background Art

[0002] Metal powder refers to a group of metal particles with a size less than 1 mm and is the main raw material for powder metallurgy. In the field of powder metallurgy, metal powders of some specific specifications are required. The standard range of the particle size of these metal powders is relatively narrow. If the particle size is too large or too small, some macroscopic physical properties of the metal powder will change greatly. Therefore, it is necessary to screen metal powders of different particle sizes. Usually, vibration screening is used to screen metal powder. First, the powder is placed on the screen plate in the screening equipment, and the vibration motor is started to drive the equipment to vibrate, so that the fine-particle metal powder falls from the screening holes on the screen plate to the bottom of the equipment, thus completing the screening. However, the existing screening equipment generally only has a single screen plate. When vibrating and screening metal powder, since the metal powder accumulates together, the bottom metal powder in contact with the screen plate has a small displacement distance under vibration, which is easy to block the screening holes, resulting in abnormal operation of the equipment. At the same time, the accumulated metal powder will also make the vibration screening time too long and the screening efficiency low.

[0003] The automatic classification and collection device of a metal powder vibrating screening device with the publication number CN214391034U includes a collection box, a screen frame, a screen mesh installed on the screen frame, a discharge pipe and a valve. Under the action of the motor and the belt, the two rotating rollers drive the convex blocks to rotate at the same time. Under the action of the first spring and the touch block, the ejector rod drives the rubber block to continuously impact the outer wall of the screen frame, and the screen frame vibrates after being impacted; this screening device only has a single screen mesh. When vibrating and screening metal powder, since the metal powder accumulates together, the bottom metal powder in contact with the screen mesh has a small displacement distance under vibration, which is easy to block the screen mesh, resulting in abnormal operation of the equipment. At the same time, the accumulated metal powder will also make the vibration screening time too long and the screening efficiency low.

[0004] Publication number CN212598692U discloses a vibration screening device, which includes a base and a vibration screening device. The top of the base is fixedly connected with the vibration screening device. The vibration screening device includes a bracket, a first fixing plate, a sieve, a second fixing plate, a first chute, a sliding block, a first rotating shaft, a connecting plate, a crank, a rotating shaft, a first motor, a fixing block and a controller. This screening device only has a single sieve. When vibrating and screening metal powder, since the metal powder accumulates together, the bottom metal powder in contact with the sieve has a small displacement distance under vibration, which easily clogs the sieve mesh, resulting in the abnormal operation of the equipment. At the same time, the accumulated metal powder will also cause too long vibration screening time and low screening efficiency. Summary of the Invention

[0005] In order to improve the above situation, a metal powder vibration screening and collecting device and its using method of the present invention provides a device that intermittently blows air into the inner screening cylinder through an air inlet hose, blows the accumulated metal powder onto multiple screening plates, and cooperates with the inner screening cylinder by a vibration motor to vibrate and screen metal powders of different particle sizes, which can avoid the complete blockage of the screening plates and shorten the screening time at the same time.

[0006] A metal powder vibration screening and collecting device of the present invention is realized as follows: A metal powder vibration screening and collecting device of the present invention is composed of a main body component and a screening component.

[0007] The main body component is composed of an outer collecting cylinder, a reinforcing spring, a supporting spring and an operation door.

[0008] An installation groove is formed on the side wall of the outer collecting cylinder, and the operation door is detachably placed in the installation groove.

[0009] Preferably, the outer collecting cylinder is of a cylindrical structure. The diameter of the outer collecting cylinder remains unchanged from the bottom of the cylinder to three-quarters of the height, and gradually decreases from three-quarters of the height to the top of the cylinder to form a supporting part.

[0010] The reinforcing spring is placed inside the outer collecting cylinder. One end of the reinforcing spring is connected to the inner wall of the outer collecting cylinder.

[0011] Preferably, one end of the reinforcing spring is located at the supporting part. There are multiple reinforcing springs, and the multiple reinforcing springs are evenly distributed circumferentially along the inner wall of the outer collecting cylinder.

[0012] The supporting spring is placed inside the outer collecting cylinder.

[0013] Preferably, the supporting spring is located at the bottom of the outer collecting cylinder. There are multiple supporting springs, and the multiple supporting springs are evenly distributed circumferentially along the bottom of the outer collecting cylinder.

[0014] The air inlet assembly is composed of an inner screening cylinder, a vibration motor protection box, a screening tank, screening fine holes, a screening plate, a feed hose, a discharge port, an air inlet hose, a wind expansion plate, and wind expansion holes.

[0015] The inner screening cylinder is movably placed between the support spring and the reinforcement spring. The other end of the inner screening cylinder is connected to the reinforcement spring, and the other end of the inner screening cylinder is connected to the support spring.

[0016] Preferably, the inner screening cylinder is located inside the outer collection cylinder. The inner screening cylinder is of a cylindrical structure. The diameter of the inner screening cylinder gradually increases from the bottom of the cylinder to the halfway point and gradually decreases from the halfway point to the top of the cylinder. The area of the top of the inner screening cylinder is smaller than the area of the bottom of the inner screening cylinder.

[0017] The feed hose is placed on the inner screening cylinder. One end of the feed hose is communicated with the inner screening cylinder, and the other end extends outward through the side wall of the outer collection cylinder.

[0018] Preferably, the feed hose is close to the top of the inner screening cylinder, and the feed hose extends obliquely upward at an acute angle with the side wall of the outer collection cylinder.

[0019] The air inlet hose is placed on the inner screening cylinder. One end of the air inlet hose is communicated with the inner screening cylinder, and the other end extends outward through the top of the outer collection cylinder.

[0020] Preferably, the air inlet hose is located at the top of the inner screening cylinder, and the air inlet hose is located between multiple reinforcement springs.

[0021] The vibration motor protection box is placed on the inner screening cylinder, and the vibration motor is placed inside the vibration motor protection box.

[0022] Preferably, the vibration motor protection box is located between multiple support springs.

[0023] A discharge port is opened on the inner screening cylinder.

[0024] Preferably, the discharge port is close to the bottom of the inner screening cylinder.

[0025] A plurality of screening tanks are equidistantly opened on the inner screening cylinder along the circumferential direction.

[0026] Preferably, the screening tank is located in the middle of the side wall of the inner screening cylinder, and the length of the screening tank is three-quarters of the height of the inner screening cylinder.

[0027] Preferably, the screening tank is a through groove.

[0028] The screening plate is placed in the screening tank.

[0029] Preferably, there are multiple screening plates, and the multiple screening plates correspond to the multiple screening tanks one by one.

[0030] Preferably, the inner layer of the screening plate is flush with the inner wall of the screening cylinder.

[0031] Multiple groups of screening fine holes are formed on the screening plate, and one group of the screening fine holes consists of multiple screening fine holes.

[0032] Preferably, multiple groups of the screening fine holes are equidistantly distributed along the width direction of the screening plate, and multiple screening fine holes in the same group are equidistantly distributed in a V shape along the length direction of the screening plate.

[0033] The air expansion plate is placed inside the inner screening cylinder.

[0034] Preferably, the air expansion plate is close to the top of the inner screening cylinder, and the air expansion plate is of a circular structure.

[0035] Multiple groups of air expansion holes are formed on the air expansion plate, and one group of the air expansion holes consists of multiple air expansion holes.

[0036] Preferably, multiple groups of the air expansion holes are equidistantly distributed from the center to the edge of the air expansion plate, and multiple air expansion holes in the same group are equidistantly distributed along the circumferential direction of the air expansion plate. The diameter of the air expansion holes gradually decreases from one end close to the intake hose to the other end.

[0037] The present invention also relates to a method for using a metal powder vibration screening and collecting device, which includes the following steps:

[0038] 1) In the initial state, the discharge port is in a blocked state, and a discharge pipe is connected to the discharge port. The discharge pipe extends outward through the side wall of the outer collection cylinder.

[0039] 2) Import the metal powder into the inner screening cylinder through the feed hose.

[0040] 3) Start the vibration motor. The vibration motor drives the inner screening cylinder to perform vibration screening. The fine-grained metal powder falls into the outer collection cylinder through the screening fine holes on the screening plate during the vibration screening process, and the larger-grained metal powder remains in the inner screening cylinder and is exported through the discharge port and the discharge pipe after the screening is completed.

[0041] Preferably, the support springs and the reinforcement springs elastically fix the inner screening cylinder during the vibration process.

[0042] 4) At the same time, intermittently introduce air flow into the inner screening cylinder through the intake hose. The air flow flows through the air expansion plate. Under the action of the air expansion holes on the air expansion plate, the air flow range is expanded, so that the air flow blows up the metal powder accumulated in the inner screening cylinder and floats it towards the side wall of the inner screening cylinder, enabling the screening plate to screen the metal powder of different particle sizes faster.

[0043] 5) After the screening is completed, open the operation door to collect the fine-grained metal powder that has fallen into the outer collection cylinder.

[0044] Beneficial effects

[0045] 1. Compared with a single screening plate, multiple screening plates are less likely to be completely blocked, ensuring the normal operation of the equipment screening.

[0046] 2. It can blow away metal powder, avoid the accumulation of metal powder, and shorten the screening time. Description of the drawings

[0047] Figure 1 It is a schematic structural diagram of a metal powder vibration screening and collecting device of the present invention;

[0048] Figure 2 It is a three-dimensional structure diagram of a metal powder vibration screening and collecting device of the present invention, which only shows the structure of the inner screening cylinder;

[0049] Figure 3 It is a schematic structural diagram of a metal powder vibration screening and collecting device of the present invention, which only shows the structure of the inner screening cylinder;

[0050] Figure 4 It is a schematic structural diagram of a metal powder vibration screening and collecting device of the present invention, which only shows the structure of the operation door.

[0051] In the drawings

[0052] Among them are: outer collecting cylinder (1), reinforcement spring (2), inner screening cylinder (3), support spring (4), vibration motor protection box (5), screening groove (6), screening fine holes (7), screening plate (8), feed hose (9), air inlet hose (10), discharge port (11), air diffuser plate (12), air diffuser holes (13), operation door (14). Detailed implementation manners

[0053] A metal powder vibration screening and collecting device of the present invention is composed of a main body component and a screening component.

[0054] The main body component is composed of an outer collecting cylinder (1), a reinforcement spring (2), a support spring (4) and an operation door (14).

[0055] An installation groove is formed on the side wall of the outer collecting cylinder (1), and the operation door (14) is detachably placed in the installation groove.

[0056] Preferably, the outer collecting cylinder (1) is of a cylindrical structure, and the diameter of the outer collecting cylinder (1) remains unchanged from the bottom of the cylinder to three-quarters of the way up, and gradually decreases from three-quarters of the way up to the top of the cylinder to form a support part.

[0057] The reinforcement spring (2) is placed inside the outer collecting cylinder (1), and one end of the reinforcement spring (2) is connected to the inner wall of the outer collecting cylinder (1).

[0058] Preferably, one end of the reinforcing spring (2) is located at the supporting part. There are multiple reinforcing springs (2), and the multiple reinforcing springs (2) are equidistantly distributed circumferentially along the inner wall of the outer collecting cylinder (1).

[0059] The supporting spring (4) is placed inside the outer collecting cylinder (1).

[0060] Preferably, the supporting spring (4) is located at the bottom of the outer collecting cylinder (1). There are multiple supporting springs (4), and the multiple supporting springs (4) are equidistantly distributed circumferentially along the bottom of the outer collecting cylinder (1).

[0061] The air inlet assembly is composed of an inner screening cylinder (3), a vibration motor protection box (5), a screening groove (6), screening fine holes (7), a screening plate (8), a feed hose (9), a discharge port (11), an air inlet hose (10), a wind expansion plate (12), and wind expansion holes (13).

[0062] The inner screening cylinder (3) is movably placed between the supporting spring (4) and the reinforcing spring (2). The other end of the inner screening cylinder (3) is connected to the reinforcing spring (2), and the other end of the inner screening cylinder (3) is connected to the supporting spring (4).

[0063] Preferably, the inner screening cylinder (3) is located inside the outer collecting cylinder (1). The inner screening cylinder (3) is of a cylindrical structure. The diameter of the inner screening cylinder (3) gradually increases from the bottom to the middle, and gradually decreases from the middle to the top. The area of the top of the inner screening cylinder (3) is smaller than the area of the bottom of the inner screening cylinder (3).

[0064] The feed hose (9) is placed on the inner screening cylinder (3). One end of the feed hose (9) is communicated with the inner screening cylinder (3), and the other end extends outwards through the side wall of the outer collecting cylinder (1).

[0065] Preferably, the feed hose (9) is close to the top of the inner screening cylinder (3), and the feed hose (9) extends obliquely upwards at an acute angle with the side wall of the outer collecting cylinder (1).

[0066] The air inlet hose (10) is placed on the inner screening cylinder (3). One end of the air inlet hose (10) is communicated with the inner screening cylinder (3), and the other end extends outwards through the top of the outer collecting cylinder (1).

[0067] Preferably, the air inlet hose (10) is located at the top of the inner screening cylinder (3), and the air inlet hose (10) is located between multiple reinforcing springs (2).

[0068] The vibration motor protection box (5) is placed on the inner screening cylinder (3), and the vibration motor is placed inside the vibration motor protection box (5).

[0069] Preferably, the vibration motor protection box (5) is located between a plurality of support springs (4).

[0070] An outlet (11) is formed in the inner screening cylinder (3).

[0071] Preferably, the outlet (11) is close to the bottom of the inner screening cylinder (3).

[0072] A plurality of screening slots (6) are equidistantly formed in the circumferential direction on the inner screening cylinder (3).

[0073] Preferably, the screening slots (6) are located in the middle of the side wall of the inner screening cylinder (3), and the length of the screening slots (6) is three-quarters of the height of the inner screening cylinder (3).

[0074] Preferably, the screening slots (6) are through slots.

[0075] A screening plate (8) is placed in the screening slot (6).

[0076] Preferably, there are a plurality of screening plates (8), and the plurality of screening plates (8) correspond to the plurality of screening slots (6) one by one.

[0077] Preferably, the screening plates (8) are flush with the inner wall of the inner screening cylinder (3).

[0078] A plurality of groups of screening fine holes (7) are formed in the screening plate (8), and one group of the screening fine holes (7) is composed of a plurality of screening fine holes (7).

[0079] Preferably, the plurality of groups of screening fine holes (7) are equidistantly distributed in the width direction of the screening plate (8), and the plurality of screening fine holes (7) in the same group are equidistantly distributed in a V shape in the length direction of the screening plate (8).

[0080] An air expansion plate (12) is placed in the inner screening cylinder (3).

[0081] Preferably, the air expansion plate (12) is close to the top of the inner screening cylinder (3), and the air expansion plate (12) is of a circular structure.

[0082] A plurality of groups of air expansion holes (13) are formed in the air expansion plate (12), and one group of the air expansion holes (13) is composed of a plurality of air expansion holes (13).

[0083] Preferably, the plurality of groups of air expansion holes (13) are equidistantly distributed from the center to the edge of the air expansion plate (12), the plurality of air expansion holes (13) in the same group are equidistantly distributed in the circumferential direction of the air expansion plate (12), and the diameter of the air expansion holes (13) gradually decreases from one end close to the intake hose (10) to the other end.

[0084] Preferably, the inner screening cylinder (3) is made of high-carbon steel. After appropriate heat treatment or cold drawing hardening, high-carbon steel has high strength and hardness, high elastic limit and fatigue limit, acceptable cutting performance, easy availability of raw materials, and low production cost;

[0085] A method for using a metal powder vibration screening and collection device according to the present invention includes the following steps:

[0086] 1) In the initial state, the discharge port (11) is in a blocked state, and a discharge pipe is connected to the discharge port (11). The discharge pipe extends outward through the side wall of the outer collection cylinder (1);

[0087] 2) Introduce the metal powder into the inner screening cylinder (3) through the feed hose (9);

[0088] 3) Start the vibration motor. The vibration motor drives the inner screening cylinder (3) to vibrate and screen. The fine-particle metal powder falls into the outer collection cylinder (1) through the screening fine holes (7) on the screening plate (8) during the vibration screening process. The larger-particle metal powder remains in the inner screening cylinder (3) and is exported through the discharge port (11) and the discharge pipe after the screening is completed;

[0089] Preferably, the support spring (4) and the reinforcement spring (2) elastically fix the inner screening cylinder (3) during the vibration process;

[0090] 4) At the same time, intermittently introduce air flow into the inner screening cylinder (3) through the air inlet hose (10). The air flow passes through the air expansion plate (12). Under the action of the air expansion holes (13) on the air expansion plate (12), the air flow range is expanded, so that the air flow blows up the metal powder accumulated in the inner screening cylinder (3) and floats it towards the side wall of the inner screening cylinder (3), enabling the screening plate (8) to screen the metal powder of different particle sizes faster;

[0091] 5) After the screening is completed, open the operation door (14) to collect the fine-particle metal powder that has fallen into the outer collection cylinder (1);

[0092] The outer collection cylinder (1) is of a cylindrical structure. The diameter of the outer collection cylinder (1) remains unchanged from the bottom of the cylinder to three-quarters of the height, and gradually decreases from three-quarters of the height to the top of the cylinder to form the design of the support part. This can enable the reinforcement spring (2) to elastically reinforce the inner screening cylinder (3) obliquely, and at the same time can avoid the air inlet hose (10), so that the air flow can smoothly enter the inner screening cylinder (3) to disperse the metal powder, prevent the metal powder from accumulating, and shorten the screening time;

[0093] The inner screening cylinder (3) is of a cylindrical structure. The design that the diameter of the inner screening cylinder (3) gradually increases from the bottom of the cylinder to the halfway point and gradually decreases from the halfway point to the top of the cylinder can increase the volume of the inner screening cylinder (3), improve the amount of metal powder screened by a single vibration, and at the same time increase the area of the screening plate (8), speed up the screening efficiency of the metal powder, and reduce the screening time;

[0094] The feeding hose (9) is close to the top of the inner screening cylinder (3). The design that the feeding hose (9) extends obliquely upward at an acute angle with the side wall of the outer collecting cylinder (1) can enable the metal powder introduced into the feeding hose (9) to fall into the inner screening cylinder (3) by itself under the action of gravity for vibration screening;

[0095] The screening groove (6) is located in the middle of the side wall of the inner screening cylinder (3). The design that the length of the screening groove (6) is three-fourths of the height of the inner screening cylinder (3) can increase the area of the screening plate (8), speed up the screening efficiency of the metal powder, and reduce the screening time;

[0096] There are multiple screening plates (8). The design that the multiple screening plates (8) correspond to the multiple screening grooves (6) one by one can be less likely to be completely blocked compared to a single horizontal screening plate (8), ensuring the normal operation of the equipment screening;

[0097] The design that multiple screening fine holes (7) in the same group are equidistantly distributed in a V shape along the length direction of the screening plate (8) can make the arrangement of the screening holes more dense, increase the number of screening holes, screen the metal powder faster, and shorten the screening time;

[0098] The design that the diameter of the air expansion hole (13) gradually decreases from the end close to the air inlet hose (10) to the other end can expand the range of air flow blowing, blow the accumulated metal powder towards the multiple screening plates (8), prevent the accumulation of metal powder, perform vibration screening faster, and shorten the screening time;

[0099] The reinforcing spring (2) cooperates with the supporting spring (4). When vibrating and screening the metal powder in the inner screening cylinder (3), it can elastically fix the inner screening cylinder (3), prevent the vibration motor protection box (5) at the bottom of the inner screening cylinder (3) from colliding with the outer collecting cylinder (1), and avoid damage to the vibration motor;

[0100] The vibration motor protection box (5) cooperates with the inner screening cylinder (3) to drive the metal powder in the inner screening cylinder (3) to vibrate, and screen the metal powder through the multiple screening plates (8) on the side wall of the inner screening cylinder (3);

[0101] The intake hose (10), the air diffuser plate (12) and the air diffuser holes (13) cooperate with each other, enabling the airflow entering from the intake hose (10) to disperse the metal powder, avoiding powder accumulation, and performing vibration screening faster, thus shortening the screening time.

[0102] It can blow air into the inner screening cylinder (3) through the intake hose (10), blowing the accumulated metal powder towards the multiple screening plates (8), and vibrating and screening the metal powder of different particle sizes by cooperating the vibration motor with the inner screening cylinder (3), avoiding the complete blockage of the screening plates (8) and shortening the screening time at the same time.

[0103] It should be noted that unless otherwise clearly specified and limited, the terms "placed", "connected" and "joined" should be understood in a broad sense. For example, it can be fixed connection methods such as hemming connection, rivet connection, pin connection, bonding connection and welding connection, or detachable connection methods such as screw connection, snap connection and hinge connection, or integral connection, or electrical connection, or directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0104] The above embodiments are the preferred embodiments of the present invention. In order to save space, the applicant has not added other embodiments, but this is not used to limit the scope of implementation of the present invention. Any person of ordinary skill in the art can make some improvements without departing from the scope of the present invention. That is, all equivalent improvements made in accordance with the present invention should be covered by the scope of the present invention.

Claims

1. A vibrating screening and collecting device for metal powder, characterized in that: It consists of a main body component and a screening component. The main body component is composed of an outer collecting cylinder, a reinforcing spring, a supporting spring, and an operation door. An installation groove is provided on the side wall of the outer collecting cylinder, and the operation door is detachably placed in the installation groove. The reinforcing spring is placed inside the outer collecting cylinder. One end of the reinforcing spring is connected to the inner wall of the outer collecting cylinder, and one end of the reinforcing spring is located at the supporting part. There are multiple reinforcing springs, and the multiple reinforcing springs are equidistantly distributed circumferentially along the inner wall of the outer collecting cylinder. The supporting spring is placed inside the outer collecting cylinder. The supporting spring is located at the bottom of the outer collecting cylinder. There are multiple supporting springs, and the multiple supporting springs are equidistantly distributed circumferentially along the bottom of the outer collecting cylinder. The air inlet component is composed of an inner screening cylinder, a vibration motor protection box, a screening groove, screening fine holes, a screening plate, a feeding hose, a discharge port, an air inlet hose, a wind expanding plate, and wind expanding holes. The inner screening cylinder is movably placed between the supporting spring and the reinforcing spring. The inner screening cylinder is connected to the other end of the reinforcing spring. The inner screening cylinder is connected to the other end of the supporting spring. The feeding hose is placed on the inner screening cylinder. One end of the feeding hose is communicated with the inner screening cylinder, and the other end extends outward through the side wall of the outer collecting cylinder. The air inlet hose is placed on the inner screening cylinder. One end of the air inlet hose is communicated with the inner screening cylinder, and the other end extends outward through the top of the outer collecting cylinder. The air inlet hose is located at the top of the inner screening cylinder. The air inlet hose is located between multiple reinforcing springs. The vibration motor protection box is placed on the inner screening cylinder. The vibration motor is placed inside the vibration motor protection box. The vibration motor protection box is located between multiple supporting springs. A discharge port is provided on the inner screening cylinder. The discharge port is close to the bottom of the inner screening cylinder. Multiple screening grooves are equidistantly opened along the circumference on the inner screening cylinder. The screening plate is placed in the screening groove. Multiple groups of screening fine holes are provided on the screening plate. One group of screening fine holes consists of multiple screening fine holes. The multiple groups of screening fine holes are equidistantly distributed along the width direction of the screening plate. The wind expanding plate is placed inside the inner screening cylinder. The wind expanding plate is close to the top of the inner screening cylinder. The wind expanding plate is of a circular structure. Multiple groups of wind expanding holes are provided on the wind expanding plate. One group of wind expanding holes consists of multiple wind expanding holes. The multiple groups of wind expanding holes are equidistantly distributed from the center to the edge of the wind expanding plate. Multiple wind expanding holes in the same group are equidistantly distributed circumferentially along the wind expanding plate.

2. The vibrating screening and collecting device for metal powder according to claim 1, characterized in that The outer collecting cylinder is of a cylindrical structure. The diameter of the outer collecting cylinder remains unchanged from the bottom to three-quarters of its height, and gradually decreases from three-quarters of its height to the top to form a supporting part, which can elastically reinforce the inner screening cylinder obliquely and can also avoid the air inlet hose at the same time.

3. The vibrating screening and collecting device for metal powder according to claim 1, characterized in that The inner screening cylinder is located inside the outer collecting cylinder. The inner screening cylinder is of a cylindrical structure. The diameter of the inner screening cylinder gradually increases from the bottom to half of its height and gradually decreases from half of its height to the top. The area of the top of the inner screening cylinder is smaller than the area of the bottom of the inner screening cylinder, which can increase the volume of the inner screening cylinder and can also increase the area of the screening plate.

4. The vibrating screening and collecting device for metal powder according to claim 1, characterized in that The feeding hose is close to the top of the inner screening cylinder, and the feeding hose and the side wall of the outer collecting cylinder extend obliquely upward at an acute angle, so that the metal powder introduced into the feeding hose can fall into the inner screening cylinder by itself under the action of gravity.

5. The vibrating screening and collecting device for metal powder according to claim 1, characterized in that The screening groove is located in the middle of the side wall of the inner screening cylinder. The screening groove is a through groove, and the length of the screening groove is three-fourths of the height of the inner screening cylinder, which can increase the area of the screening plate and accelerate the screening efficiency of the metal powder.

6. The vibrating screening and collecting device for metal powder according to claim 3, characterized in that There are multiple screening plates, which are flush with the inner wall of the inner screening cylinder. The multiple screening plates correspond to the multiple screening grooves one by one, and are less likely to be completely blocked compared with a single horizontal screening plate, ensuring the normal operation of the equipment screening.

7. The vibrating screening and collecting device for metal powder according to claim 1, characterized in that Multiple screening fine holes in the same group are equidistantly distributed in a V shape along the length direction of the screening plate, which can make the arrangement of the screening holes more dense and increase the number of screening holes.

8. The vibrating screening and collecting device for metal powder according to claim 1, characterized in that The diameter of the air expansion hole gradually decreases from one end close to the air inlet hose to the other end, which can expand the air flow blowing range.

9. The vibrating screening and collecting device for metal powder according to claim 4, characterized in that The air inlet hose, the air expansion plate and the air expansion hole cooperate with each other, so that the air flow coming in from the air inlet hose can blow the metal powder away, avoiding the accumulation of powder, and vibrating and screening faster, shortening the screening time.

10. The using method of the vibrating screening and collecting device for metal powder according to claim 1, characterized in that, It includes the following steps: 1) In the initial state, the discharge port is in a blocked state, and a discharge pipe is connected to the discharge port. The discharge pipe extends outward through the side wall of the outer collecting cylinder; 2) Introduce the metal powder into the inner screening cylinder through the feeding hose; 3) Start the vibration motor, and the vibration motor drives the inner screening cylinder to perform vibration screening. The fine-grained metal powder falls into the outer collecting cylinder through the screening fine holes on the screening plate during the vibration screening process. The larger-grained metal powder remains in the inner screening cylinder and is exported through the discharge port and the discharge pipe after the screening is completed; the support spring and the reinforcement spring elastically fix the inner screening cylinder during the vibration process; 4) At the same time, intermittently introduce air flow into the inner screening cylinder through the air inlet hose. The air flow flows through the air expansion plate. Under the action of the air expansion holes on the air expansion plate, the air flow range is expanded, so that the air flow blows up the metal powder accumulated in the inner screening cylinder and floats towards the side wall of the inner screening cylinder, enabling the screening plate to screen the metal powder of different particle sizes faster; 5) After the screening is completed, open the operation door to collect the fine-grained metal powder that has fallen into the outer collecting cylinder.

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