A powder classification device

Abstract

This utility model discloses a powder grading device, relating to the field of powder grading technology. The utility model includes a screening machine, a feeding screening mechanism, and an air supply mechanism, as well as an air blower, transmission components, adjusting components, and an air delivery channel. The feeding screening mechanism is located at the inlet of the screening machine, and the air supply mechanism is located at the outlet of the screening machine. The utility model uses the air supply mechanism to drive the transmission wheel to rotate. Through the transmission wheel and transmission belt, the rotating rod rotates. When the reciprocating screw is fixedly connected to the rotating rod, it drives the reciprocating screw to rotate, causing the slider to slide back and forth along the surface of the reciprocating screw. This causes the collar to reciprocate on the surface of the screening cylinder. The airflow driven by the air supply mechanism is delivered to the outlet pipe via a U-shaped channel and an air delivery pipe. The airflow is blown by the collar to the surface of the screening cylinder, dispersing the sticky powder clogging the inner wall of the screening cylinder and ensuring the smooth operation of the screening cylinder.

Description

Technical Field

[0001] This utility model relates to the field of powder classification technology, and specifically to a powder classification device. Background Technology

[0002] Powder classification is a key process in industries such as chemical, pharmaceutical, and new materials. Horizontal air classifiers in powder classification equipment have advantages such as compact structure, large processing capacity, and high classification efficiency. The working principle of the air classifier is to send the material with high-speed airflow into the screen cylinder. Under the combined action of centrifugal force and airflow, fine particles pass through the screen holes of the screen cylinder to become fine powder products, while coarse particles move along the inner wall of the screen cylinder and are discharged from the coarse powder outlet.

[0003] When processing viscous powders, existing air classifiers often fail to meet the requirements for grading because the viscous powder particles tend to adhere to the screen surface or the edge of the screen holes when passing through the screen or impacting the screen. Furthermore, the particles are prone to forming tiny agglomerates that are larger than the screen holes, directly clogging the channels. This results in a reduction in the screening area, a decrease in the fine powder throughput, and an inability to meet the grading requirements. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a powder grading device to solve the problem of **.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a powder grading device, including a screening machine, a feeding screening mechanism, and an air supply mechanism, further including a blower hood, a transmission component, an adjustment component, and an air supply channel. The feeding screening mechanism is provided at the inlet of the screening machine, and the air supply mechanism is provided at the outlet of the screening machine. The blower hood is fitted on the surface of the screening end of the screening machine. The adjustment component is rotatably installed inside the screening machine. The two ends of the transmission component are respectively connected to the drive end of the air supply mechanism and one end of the adjustment component. An air supply channel is fixedly installed on the surface of the screening machine. The air inlet of the air supply channel is located at the outlet of the screening machine, and the air outlet of the air supply channel is connected to the blower hood.

[0006] The screening machine includes a machine shell, a support frame, and a screening cylinder. The support frame is fixedly installed at the bottom of the machine shell, and the screening cylinder is fixedly installed inside the machine shell.

[0007] The feeding and screening mechanism consists of components such as a motor, spiral blades, gear set and impeller blades, while the air supply mechanism consists of components such as a motor and fan blades.

[0008] The blower hood includes a collar and an air outlet pipe. The collar is slidably installed inside the screening machine. An air outlet pipe is installed inside the collar. An air outlet hole is opened on the inner wall of the collar, and the air outlet end of the air outlet pipe is connected to it. A slider is fixedly installed on the top of the collar, and the slider is connected to the adjustment component.

[0009] The transmission component includes a transmission wheel and a transmission belt. There are two sets of transmission wheels. One set of transmission wheels is fixedly installed at one end of the adjustment component, and the other set of transmission wheels is fixedly installed at the drive end of the air supply mechanism. The transmission belt is sleeved on the surface of the two sets of transmission wheels and is meshed with them.

[0010] The adjustment component includes a reciprocating lead screw, a rotating rod, an electromagnet, a connecting rod, and a torsion spring. The reciprocating lead screw is rotatably installed inside the outer casing of the machine body, and the rotating rod is rotatably installed on the surface of the outer casing of the machine body. The reciprocating lead screw and the rotating rod are on the same axis. An electromagnet is provided at the other end of the rotating rod, and a connecting rod is rotatably installed at the other end of the rotating rod. A torsion spring is provided at the rotating part of the connecting rod. A limiting groove is provided at one end of the reciprocating lead screw near the rotating rod. The limiting groove is correspondingly set with the connecting rod. An adsorption block is provided on the side of the connecting rod near the electromagnet.

[0011] The air supply channel includes a U-shaped channel and an air supply pipe. One end of the U-shaped channel is fixedly installed on the surface of the machine body shell near the air supply mechanism and is equipped with a filter screen. The other end of the U-shaped channel penetrates the surface of the machine body shell and is connected to the air supply pipe. The free end of the air supply pipe is connected to the blower hood.

[0012] The beneficial effects of this utility model are as follows: This invention utilizes an air supply mechanism to drive a transmission wheel to rotate. Through the transmission wheel and belt, the transmission wheel drives a rotating rod to rotate. When the reciprocating screw is fixedly connected to the rotating rod, it drives the reciprocating screw to rotate, causing the slider to slide back and forth along the surface of the reciprocating screw. This causes the collar to move back and forth on the surface of the screening cylinder. The airflow driven by the air supply mechanism is transported to the air outlet pipe via a U-shaped channel and an air delivery pipe. The airflow is blown by the collar to the surface of the screening cylinder, dispersing the sticky powder that is stuck on the inner wall of the screening cylinder, ensuring the smooth operation of the screening cylinder. An electromagnet applies a traction magnetic force to the adsorption block at the connecting rod, thereby pulling the connecting rod to rotate against the spring force of the torsion spring. This causes the connecting rod to fit into the limiting groove of the reciprocating screw. The rotating rod can drive the reciprocating screw to rotate. When there is no need to clean the blocked powder, the torsion spring pulls the connecting rod away from the limiting groove of the reciprocating screw. Attached Figure Description

[0013] Figure 1 This is a first-person perspective three-dimensional structural diagram of the present invention; Figure 2 This is a two-dimensional structural diagram of the present invention from a second perspective; Figure 3 This is a schematic internal cross-sectional view of the present invention; Figure 4 This is a partial cross-sectional view of the present invention; Figure 5 yes Figure 4 Enlarged schematic diagram of section A in the middle.

[0014] Reference numerals in the attached drawings: 1. Screening machine; 101. Machine casing; 102. Support frame; 103. Screening cylinder; 2. Feeding and screening mechanism; 3. Air supply mechanism; 4. Blower hood; 401. Collar; 402. Air outlet pipe; 403. Sliding block; 5. Transmission components; 501. Transmission wheel; 502. Transmission belt; 6. Adjustment components; 601. Reciprocating screw; 602. Rotating rod; 603. Electromagnet; 604. Connecting rod; 605. Torsion spring; 7. Air supply channel; 701. U-shaped channel; 702. Air supply pipe. Detailed Implementation

[0015] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0016] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 - Appendix Figure 5 The present invention will be further described below.

[0017] A powder grading device includes a screening machine 1, a feeding screening mechanism 2, and an air supply mechanism 3. It also includes an air blower 4, a transmission component 5, an adjustment component 6, and an air supply channel 7. The feeding screening mechanism 2 is provided at the inlet of the screening machine 1, and the air supply mechanism 3 is provided at the outlet of the screening machine 1. The air blower 4 is fitted on the screening end surface of the screening machine 1. The adjustment component 6 is rotatably installed inside the screening machine 1. The two ends of the transmission component 5 are respectively connected to the drive end of the air supply mechanism 3 and one end of the adjustment component 6. The air supply channel 7 is fixedly installed on the surface of the screening machine 1. The air inlet of the air supply channel 7 is located at the outlet of the screening machine 1, and the air outlet of the air supply channel 7 is connected to the air blower 4. Specifically, the powder is fed into the screening machine 1 by the feeding screening mechanism 2, and the powder moves inside the screening machine 1 and is subjected to centrifugal force. The air supply mechanism 3 drives the gas flow, so that the powder moves with the gas inside the screening machine 1. The transmission component 5 is driven by the air supply mechanism 3, which in turn drives the adjusting component 6 to rotate synchronously. The adjusting component 6 drives the blower hood 4 to reciprocate inside the screening machine 1. The air supply channel 7 guides the airflow that reaches the outlet of the screening machine 1 to the blower hood 4 to blow away the blocked powder.

[0018] The screening machine 1 includes a machine body shell 101, a support frame 102 and a screening cylinder 103. The support frame 102 is fixedly installed at the bottom of the machine body shell 101, and the screening cylinder 103 is fixedly installed inside the machine body shell 101. Specifically, the powder is sieved through the sieve cylinder 103. Small powder particles can pass through the sieve holes on the surface of the sieve cylinder 103, while large powder particles flow along the sieve cylinder 103.

[0019] The feeding and screening mechanism 2 is composed of components such as a motor, spiral blades, gear set and impeller blades. The output end of the motor is connected to the spiral blades. The spiral blades and impeller blades are connected by the gear set. The spiral blades are rotatably installed at the feed inlet of the machine body shell 101. The impeller blades are rotatably installed inside the screening cylinder 103. The air supply mechanism 3 is composed of components such as a motor and fan blades. The output end of the motor is connected to the fan blades. The fan blades are rotatably installed at the discharge outlet of the machine body shell 101. Specifically, the motor of the feeding and screening mechanism 2 drives the spiral blades, gear set and impeller blades to rotate. The spiral blades drive the powder to be fed into the screening cylinder 103 from the inlet of the outer shell 101. The impeller blades contact the powder, causing the powder to impact the inner wall of the screening cylinder 103. Small particles pass through the screening cylinder 103, while large particles remain inside the screening cylinder 103.

[0020] The blower hood 4 includes a collar 401 and an air outlet pipe 402. The collar 401 is slidably sleeved on the surface of the screening cylinder 103. The air outlet pipe 402 is installed inside the collar 401. The inner wall of the collar 401 has air outlet holes arranged at equal intervals, and the air outlet end of the air outlet pipe 402 is connected to it. A slider 403 is fixedly installed on the top of the collar 401. The slider 403 is connected to the adjustment component 6. Specifically, the slider 403 drives the collar 401 to move, so that the air outlet pipe 402 inside the collar 401 blows air onto the surface of the screening cylinder 103.

[0021] The transmission component 5 includes a transmission wheel 501 and a transmission belt 502. There are two sets of transmission wheels 501. One set of transmission wheels 501 is fixedly installed at one end of the adjustment component 6, and the other set of transmission wheels 501 is fixedly installed on the surface of the motor output end of the air supply mechanism 3. The transmission belt 502 is sleeved on the surface of the two sets of transmission wheels 501 and is meshed with them. Specifically, through the meshing of the transmission wheel 501 and the transmission belt 502, when the air supply mechanism 3 drives the gas flow, the adjustment component 6 is driven to rotate synchronously through the transmission component 5.

[0022] The adjustment component 6 includes a reciprocating screw 601, a rotating rod 602, an electromagnet 603, a connecting rod 604, and a torsion spring 605. The reciprocating screw 601 is rotatably installed inside the housing 101 and is threadedly connected to the slider 403. The rotating rod 602 is rotatably installed on the surface of the housing 101 and is located above the air supply mechanism 3. A set of transmission wheels 501 is fixedly installed at one end of the rotating rod 602. The reciprocating screw 601 and the rotating rod 602 are on the same axis. The other end of the rotating rod 602 is provided with an electromagnet 603. The other end of the rotating rod 602 is rotatably installed with a connecting rod 604, and a torsion spring 605 is provided at the rotating part of the connecting rod 604. A limiting groove is provided at the end of the reciprocating screw 601 near the rotating rod 602. The limiting groove is correspondingly provided with the connecting rod 604. An adsorption block is provided on the side of the connecting rod 604 near the electromagnet 603. Specifically, the electromagnet 603 applies electromagnetic traction to the adsorption block of the connecting rod 604, causing the connecting rod 604 to rotate. The connecting rod 604 overcomes the elastic force of the torsion spring 605, causing the connecting rod 604 to fit into the limiting groove of the reciprocating screw 601, connecting the rotating rod 602 to the reciprocating screw 601. This allows the rotating rod 602, driven by the transmission component 5, to drive the reciprocating screw 601 to rotate through the transmission of the internal components.

[0023] The air supply channel 7 includes a U-shaped channel 701 and an air supply pipe 702. One end of the U-shaped channel 701 is fixedly installed on the surface of the housing 101 near the air supply mechanism 3 and is equipped with a filter screen. The other end of the U-shaped channel 701 passes through the surface of the housing 101 and is connected to the air supply pipe 702. The free end of the air supply pipe 702 is connected to the collar 401 and communicates with the air outlet pipe 402. The air supply pipe 702 is a deformable corrugated pipe. Specifically, the airflow inside the outer casing 101 is guided to the blower hood 4 through the U-shaped channel 701 and the air supply pipe 702, and the powder is blocked from entering the interior of the U-shaped channel 701 by the filter screen.

[0024] In summary: When using this utility model, the operator adds the graded powder into the device through the feed port of the outer casing 101. The feeding and screening mechanism 2 and the air supply mechanism 3 are driven to make the powder flow inside the screening machine 1. Small particles pass through the screening cylinder 103 and are discharged, while large particles flow out from inside the screening cylinder 103, completing the powder screening process. If the screened powder is sticky and easily clogs the sieve holes of the screening cylinder 103, the electromagnet 603 is driven to electromagnetically pull the adsorption block of the connecting rod 604, causing the connecting rod 604 to rotate against the elastic force of the torsion spring 605 until the connecting rod 604 fits into the limiting groove of the reciprocating screw 601. After completing the connection between the rotating rod 602 and the reciprocating screw 601, the motor of the air supply mechanism 3 drives the transmission belt 502 to rotate. Through the transmission wheel 501 and the transmission belt 502, the rotating rod 602 and the reciprocating screw 601 are driven to rotate. The reciprocating screw 601 drives the slider 403 to reciprocate inside the outer shell 101. The airflow enters the interior of the U-shaped channel 701 and is transmitted through the U-shaped channel 701, the air supply pipe 702 and the air outlet pipe 402. The gas is discharged through the collar 401. As the collar 401 moves, the gas is blown onto the surface of the sieve cylinder 103, which disperses the powder blocking the sieve holes on the inner wall of the sieve cylinder 103.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A powder classifying apparatus comprising a sieve machine (1), a feeding and sieving mechanism (2) and an air feeding mechanism (3), characterized in that, It also includes a blower hood (4), a transmission component (5), an adjustment component (6), and an air supply channel (7). The feed inlet of the screening machine (1) is provided with a feeding screening mechanism (2), and the outlet of the screening machine (1) is provided with an air supply mechanism (3). The screening end surface of the screening machine (1) is fitted with a blower hood (4). The adjustment component (6) is rotatably installed inside the screening machine (1). The two ends of the transmission component (5) are respectively connected to the drive end of the air supply mechanism (3) and one end of the adjustment component (6). The surface of the screening machine (1) is fixedly installed with an air supply channel (7). The air inlet of the air supply channel (7) is located at the outlet of the screening machine (1), and the air outlet of the air supply channel (7) is connected to the blower hood (4).

2. A powder classification device according to claim 1, wherein The screening machine (1) includes a machine body shell (101), a support frame (102) and a screening cylinder (103). The support frame (102) is fixedly installed at the bottom of the machine body shell (101), and the screening cylinder (103) is fixedly installed inside the machine body shell (101).

3. The powder classifying device according to claim 1, wherein The feeding and screening mechanism (2) consists of a motor, spiral blades, gear set and impeller blades, and the air supply mechanism (3) consists of a motor and fan blades.

4. The powder classifying device according to claim 1, wherein The blower hood (4) includes a collar (401) and an air outlet pipe (402). The collar (401) is slidably installed inside the screening machine (1). An air outlet pipe (402) is installed inside the collar (401). An air outlet hole is opened on the inner wall of the collar (401), and the air outlet end of the air outlet pipe (402) is connected to it. A slider (403) is fixedly installed on the top of the collar (401). The slider (403) is connected to the adjustment component (6).

5. A powder classification device according to claim 1, characterized in that, The transmission component (5) includes a transmission wheel (501) and a transmission belt (502). There are two sets of transmission wheels (501). One set of transmission wheels (501) is fixedly installed at one end of the adjustment component (6), and the other set of transmission wheels (501) is fixedly installed at the drive end of the air supply mechanism (3). The transmission belt (502) is sleeved on the surface of the two sets of transmission wheels (501) and is meshed with them.

6. The powder classification device of claim 1, wherein The adjusting component (6) includes a reciprocating lead screw (601), a rotating rod (602), an electromagnet (603), a connecting rod (604), and a torsion spring (605). The reciprocating lead screw (601) is rotatably mounted inside the outer shell (101), and the rotating rod (602) is rotatably mounted on the surface of the outer shell (101). The reciprocating lead screw (601) and the rotating rod (602) are on the same axis. An electromagnet (603) is provided at the other end of the rotating rod (602), and a connecting rod (604) is rotatably mounted at the other end of the rotating rod (602). A torsion spring (605) is provided at the rotating part of the connecting rod (604). The reciprocating lead screw (601) has a limiting groove at one end near the rotating rod (602). The limiting groove is correspondingly set with the connecting rod (604). The connecting rod (604) has an adsorption block on the side near the electromagnet (603).

7. The powder classification device of claim 1, wherein The air supply channel (7) includes a U-shaped channel (701) and an air supply pipe (702). One end of the U-shaped channel (701) is fixedly installed on the surface of the outer shell (101) near the end of the air supply mechanism (3) and is provided with a filter screen. The other end of the U-shaped channel (701) penetrates the surface of the outer shell (101) and is connected to the air supply pipe (702). The free end of the air supply pipe (702) is connected to the blower hood (4).

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