Constant-speed feeding device for conveying powder materials in negative-pressure vacuum mode

Abstract

A constant-speed feeding device for conveying powder materials in a negative-pressure vacuum mode comprises a hopper. A feeding hole is formed in one side of the upper part of the hopper; the lower portion of the hopper is of an inverted-cone-shaped structure. The lower part of the hopper is connected with a negative pressure bin; the negative pressure bin is of an inverted-cone-shaped structure. The bottom of the negative pressure bin is connected with a discharging pipeline; a magnetically controlled switch is arranged at one end of the discharge pipeline away from the negative pressure bin; an air pump is arranged on the side, away from the magnetic control switch, below the connecting position of the discharging pipeline and the negative pressure bin. An air outlet of the air pump is communicated with the discharging pipeline; a motor is arranged at the top of the hopper; an output shaft of the motor is connected with a rotating shaft extending into the hopper; the rotating shaft is provided with spiral blades at the bottom in the hopper; the outer edge of the spiral blade is in an inverted cone shape attached to the bottom of the hopper. According to the utility model, the motor drives the rotating shaft to drive the spiral blade to rotate, and powder materials in the hopper are rotationally extruded into the negative pressure bin, so that the agglomeration or cavity phenomenon of the powder caused by moisture absorption or electrostatic adsorption is eliminated, and the stability of continuous blanking and feeding is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of powder material feeding devices, and particularly relates to a uniform feeding device for negative pressure vacuum conveying powder materials. Background Technology

[0002] When conveying powder materials, negative pressure vacuum feeding devices are usually used. Air is drawn in by an air source device to create negative pressure inside the system. The powder material enters the conveying pipeline with the negative pressure airflow. It has the advantages of preventing dust leakage, wide applicability, and easy long-distance conveying, and is widely used in various industries. In actual use, powder materials are prone to agglomeration due to their hygroscopicity and electrostatic adsorption. When conveying powder materials with agglomerates through the feeding device, the agglomerated material is prone to blockage or voids in the silo or pipeline, resulting in discontinuous feeding process and fluctuations in the supply. Utility Model Content

[0003] The purpose of this utility model is to provide a uniform feeding device for negative pressure vacuum conveying of powder materials, so as to solve the technical problem that in actual use, powder materials are prone to agglomeration due to their easy absorption of moisture and electrostatic adsorption. When conveying powder materials with agglomeration through the feeding device, the agglomerated materials are prone to blockage or material voids in the silo or pipeline, resulting in discontinuous feeding process and fluctuations in the feeding amount.

[0004] To achieve the above objectives, the specific technical solution of this utility model for a uniform feeding device for negative pressure vacuum conveying of powder materials is as follows:

[0005] A uniform feeding device for conveying powder materials under negative pressure vacuum includes a hopper; a feed inlet is provided on one side of the upper part of the hopper; the lower part of the hopper has an inverted conical structure; a negative pressure chamber is connected to the lower part of the hopper; the negative pressure chamber has an inverted conical structure; a discharge pipe is connected to the bottom of the negative pressure chamber; a magnetic switch is provided at the end of the discharge pipe away from the negative pressure chamber; an air pump is provided below the connection between the discharge pipe and the negative pressure chamber, away from the magnetic switch; the air outlet of the air pump is connected to the discharge pipe; a motor is provided at the top of the hopper; a rotating shaft is connected to the output shaft of the motor and extends into the hopper; a spiral blade is provided at the bottom of the rotating shaft inside the hopper; the outer edge of the spiral blade is an inverted conical shape that fits the bottom of the hopper.

[0006] Furthermore, a switch flange is provided between the hopper and the negative pressure chamber.

[0007] Furthermore, a planetary gear set is provided at the top of the hopper outside the rotating shaft; the planetary gear set includes a drive gear fixedly installed on the outside of the rotating shaft; multiple driven gears are meshed and connected to the outside of the drive gear; gear rings are fixedly installed on the outside of the multiple driven gears and are meshed with the driven gears; a stirring shaft is provided below the driven gears.

[0008] This utility model discloses a uniform feeding device for negative pressure vacuum conveying of powder materials, which has the following advantages: A rotating shaft and spiral blades are installed inside the hopper. After the powder material is added to the hopper through the feed inlet, the motor drives the rotating shaft to rotate the spiral blades. The spiral blades rotate and compress the powder material into the negative pressure chamber. Then, the negative pressure airflow generated by the air pump is used to convey the material through the discharge pipe. The compression and conveying of the powder material by the spiral blades eliminates the agglomeration or voids caused by moisture absorption or electrostatic adsorption, ensuring continuous feeding. At the same time, the compression of the spiral blades can reduce the blockage of the discharge pipe and increase the stability of the feeding. A planetary gear set is installed inside the hopper. The motor drives the rotating shaft to rotate, which in turn drives multiple driven gears to rotate. The stirring shafts on the driven gears rotate inside the hopper, stirring the powder material and shearing and breaking up any lumps. This prevents equipment blockage or material voids, increases the flowability of the powder material, enhances the stability of the negative pressure conveying supply, and ensures a stable and uniform feeding flow rate. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0010] Figure 2 This is a schematic cross-sectional view of the internal structure of the hopper of this utility model;

[0011] Figure 3 This utility model Figure 2 Enlarged view of region A in the middle;

[0012] The markings in the diagram are as follows: 1. Hopper; 2. Feed inlet; 3. Negative pressure chamber; 4. Discharge pipe; 5. Magnetic switch; 6. Air pump; 7. Motor; 8. Shaft; 9. Spiral blade; 10. Switch flange; 11. Planetary gear set; 12. Drive gear; 13. Driven gear; 14. Gear ring; 15. Agitator shaft. Detailed Implementation

[0013] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a uniform feeding device for conveying powder materials under negative pressure vacuum.

[0014] like Figure 1-3As shown, this utility model discloses a uniform feeding device for conveying powder materials under negative pressure vacuum, comprising a hopper 1; a feed inlet 2 is provided on one side of the upper part of the hopper 1; the lower part of the hopper 1 has an inverted conical structure; a negative pressure chamber 3 is connected to the lower part of the hopper 1; the negative pressure chamber 3 has an inverted conical structure; a discharge pipe 4 is connected to the bottom of the negative pressure chamber 3; a magnetic control switch 5 is provided at the end of the discharge pipe 4 away from the negative pressure chamber 3; an air pump 6 is provided below the connection position of the discharge pipe 4 and the negative pressure chamber 3, away from the magnetic control switch 5; the air outlet of the air pump 6 is connected to the discharge pipe 4; a motor 7 is provided at the top of the hopper 1; a rotating shaft 8 is connected to the output shaft of the motor 7 and extends into the hopper 1; a spiral blade 9 is provided at the bottom of the rotating shaft 8 inside the hopper 1; the outer edge of the spiral blade 9 is inverted conical in shape to fit the bottom of the hopper 1; a switch flange 10 is provided between the hopper 1 and the negative pressure chamber 3.

[0015] Combination Figure 1-3 As shown, during operation, powder material is fed into hopper 1 through inlet 2. The flange switch is opened, and motor 7 is started. The output shaft of motor 7 drives shaft 8 and spiral blades 9 to rotate. The rotation of spiral blades 9 compresses and pushes the powder material in hopper 1 into negative pressure chamber 3. The magnetic control switch 5 is turned on, and air pump 6 is started. Air pump 6 creates a vacuum negative pressure in discharge pipe 4. The powder material in negative pressure chamber 3 is drawn into discharge pipe 4 by the negative pressure and transported with the airflow. After the powder material is added into hopper 1 through inlet 2, motor 7 drives shaft 8 to rotate spiral blades 9. Spiral blades 9 rotate and compress the powder material into negative pressure chamber 3. Then, the negative pressure airflow generated by air pump 6 is used to transport the material from discharge pipe 4. The compression and conveying of powder material by spiral blades 9 eliminates the agglomeration or voids caused by moisture absorption or electrostatic adsorption, ensuring continuous feeding. At the same time, the compression of spiral blades 9 can reduce the blockage of discharge pipe 4 and increase the stability of feeding.

[0016] A planetary gear set 11 is installed at the top of the hopper 1 outside the rotating shaft 8. The planetary gear set 11 includes a drive gear 12 fixedly installed on the outside of the rotating shaft 8. Multiple driven gears 13 are meshed and connected to the outside of the drive gear 12. Gear rings 14 are fixedly installed on the outside of the multiple driven gears 13 and mesh with the driven gears 13. A stirring shaft 15 is installed on the lower side of the driven gears 13. The planetary gear set 11 is installed in the hopper 1. The rotating shaft 8 is driven to rotate by the motor 7, which drives the drive gear 12 to drive the multiple driven gears 13 to rotate. The stirring shaft 15 installed on the multiple driven gears 13 rotates in the hopper 1, stirring the powder material in the hopper 1, shearing and breaking up the lumps in the powder material, avoiding equipment blockage or material voids, while increasing the flowability of the powder material, enhancing the stability of the negative pressure conveying supply, and ensuring a stable and uniform feed flow rate.

[0017] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A uniform feeding device for conveying powder materials under negative pressure vacuum, characterized in that, Includes a hopper (1); a feed inlet (2) is provided on one side of the upper part of the hopper (1); the lower part of the hopper (1) is an inverted cone structure; a negative pressure chamber (3) is connected to the lower part of the hopper (1); the negative pressure chamber (3) is an inverted cone structure; a discharge pipe (4) is connected to the bottom of the negative pressure chamber (3); a magnetic switch (5) is provided at the end of the discharge pipe (4) away from the negative pressure chamber (3); an air pump (6) is provided below the position where the discharge pipe (4) connects to the negative pressure chamber (3) and away from the magnetic switch (5); the air outlet of the air pump (6) is connected to the discharge pipe (4); a motor (7) is provided at the top of the hopper (1); a rotating shaft (8) is connected to the output shaft of the motor (7) and extends into the hopper (1); a spiral blade (9) is provided at the bottom of the rotating shaft (8) inside the hopper (1); the outer edge of the spiral blade (9) is an inverted cone shape that fits the bottom of the hopper (1).

2. The uniform feeding device for negative pressure vacuum conveying of powder materials according to claim 1, characterized in that, A switch flange (10) is provided between the hopper (1) and the negative pressure chamber (3).

3. The uniform feeding device for negative pressure vacuum conveying powder materials according to claim 1, characterized in that, A planetary gear set (11) is provided at the top of the hopper (1) outside the rotating shaft (8); the planetary gear set (11) includes a drive gear (12) fixedly provided outside the rotating shaft (8); a plurality of driven gears (13) are provided on the outside of the drive gear (12) through meshing connection; a gear ring (14) is fixedly provided on the outside of the plurality of driven gears (13) and meshing connection is made between the gear ring (14) and the driven gear (13); a stirring shaft (15) is provided on the lower side of the driven gear (13).

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