Impeller feeder suitable for conveying viscous material and method for improving air tightness of impeller feeder

Abstract

This invention relates to the field of material conveying, and particularly to an impeller feeder suitable for conveying viscous materials and a method for improving the airtightness of the impeller feeder. The impeller feeder suitable for conveying viscous materials includes an impeller cavity (10) and blades (20). The impeller cavity (10) is equipped with a drive assembly (30), and the drive shaft (31) of the drive assembly (30) extends into the impeller cavity (10). The connecting ends of the blades (20) are fixedly connected to the drive shaft (31). The sealing ends of the blades (20) are located on the wall of the impeller cavity (10) and are hinged with gravity levers (40). The gravity levers (40) swing between adjacent blades (20) as the drive shaft (31) rotates. This invention reduces the adhesion of materials to the blades by using gravity levers, achieving a self-cleaning function for the blades and ensuring the airtightness of the device.

Description

Technical Field

[0001] This invention relates to the field of material conveying, and in particular to an impeller feeder suitable for conveying viscous materials and a method for improving the airtightness of the impeller feeder. Background Technology

[0002] An impeller feeder, also known as a rotary valve or star-shaped discharge valve, mainly consists of a housing, blades, and a motor. Installed below the feed hopper, it prevents external air from entering subsequent processes. Generally, when the feeder is full, the probability of external air entering subsequent processes is low, but it can easily cause material accumulation and blockage, especially when the material is highly viscous. Under unstable feeding conditions, direct gas communication may occur between the impeller feeder's inlet and outlet, leading to feeder failure. Similarly, when the material is highly viscous, it cannot slide to the far end of the blades in time, making direct gas communication between the inlet and outlet highly likely, which can harm subsequent processing. Therefore, solving the problems of conveying viscous materials in impeller feeders is a very real technical issue.

[0003] Chinese patent document CN102502195A discloses an impeller feeder, the main body of which consists of a machine body and an impeller installed inside the machine body. The impeller includes blades, a main shaft, and an impeller rotating plate. By hinged at the root of the blades to the main shaft, the blades can swing freely around the hinge point at the root within a certain angle range to solve the problem of material accumulation at the root of the blades. The swing of the blades is limited so that the material adhering to the blades can be shaken off during the rotation of the blades. This solution helps the sliding of sticky materials on the blades and provides a useful reference for solving the problem of conveying sticky materials. However, it does not consider the problem of airtightness. In its embodiment, the probability of direct gas communication between the inlet and outlet of the impeller feeder is very high. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned defects of the prior art and provide an impeller feeder suitable for conveying viscous materials, reducing the adhesion of viscous materials to the blades, and ensuring the airtightness of the impeller feeder.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] An impeller feeder suitable for conveying viscous materials includes an impeller cavity and blades located within the impeller cavity. The impeller cavity has an inlet end and an outlet end. The impeller cavity is equipped with a drive assembly, the drive shaft of which extends into the impeller cavity. The connecting end of the blade is connected to the drive shaft, and the sealing end of the blade is located on the wall of the impeller cavity. The connecting end of the blade is fixed to the drive shaft, and a gravity lever is hinged to the sealing end of the blade. The gravity lever swings between adjacent blades as the drive shaft rotates, thereby causing the gravity lever to generate a motion trajectory opposite to the rotation direction of the drive shaft at its hinged end. At the same time, the free end of the gravity lever pushes the material falling on the previous blade to the sealing end of the previous blade.

[0007] The inventive concept of this invention lies in:

[0008] The connecting end of the blade is fixed to the drive shaft, and the volume between adjacent blades remains unchanged. The rotation of the drive shaft causes the gravity paddles to swing between adjacent blades, resulting in a pushing and crushing effect on the material at both ends of the gravity paddles. The free end of the gravity paddle pushes material falling onto the preceding blade towards the sealing end of the preceding blade, preventing material from adhering and accumulating at the bottom of adjacent blades. The hinged end of the gravity paddle, due to its movement direction opposite to the rotation direction of the drive shaft, can reverse-crush the material between the blade's sealing end and the impeller cavity wall, reducing the probability of material falling between the blade's sealing end and the impeller cavity wall. It also works in conjunction with the free end of the following gravity paddle to position the material at the blade's sealing end, thus ensuring a sealing effect. Because this process pushes the material to the end of the blade, it can fall quickly when it aligns with the discharge end of the impeller cavity. For materials still adhering to the blade surface, the gravity paddle also acts as a knocking and vibrating device during the reset process, which can promote the material to slide towards the sealing end of the blade.

[0009] As an improvement, the gravity lever is equipped with a limiting component, which allows the gravity lever to swing within a range of 45-60°. By limiting the swing angle of the gravity lever, the limiting component ensures that the gravity lever can smoothly return to its original position, preventing it from failing to return to its original position and thus malfunctioning.

[0010] As an improvement, the gravity lever is hinged to the outer edge of the blade sealing end, thereby improving the sealing effect between the blade sealing end and the impeller cavity wall.

[0011] As an improvement, the gravity lever is hinged to the side of the blade connection end. The gravity lever is a zigzag shape composed of a long arm and a short arm, with the long arm and short arm located on the same side of the hinged blade, and rotating in the same direction. This design uses the short arm to lift the blade from below, thereby forming a material accumulation area at the blade sealing end, which can further improve the sealing effect.

[0012] As a further improvement, the length of the long arm of the gravity lever does not exceed the distance between the hinge point and the adjacent blade, so that the gravity lever can be smoothly reset without setting a special limiting component.

[0013] As an improvement, the width of the gravity lever is the same as the width of the blade.

[0014] As an improvement, the gravity lever is in the form of a grid.

[0015] The present invention also provides a method for improving the airtightness of an impeller feeder. A gravity deflector is added to the blades of the impeller feeder. The gravity deflector is hinged to the sealed end of the blade. As the drive shaft on the impeller feeder rotates, the gravity deflector generates a motion trajectory at its hinged end that is opposite to the rotation direction of the drive shaft. At the same time, the free end of the gravity deflector pushes the material falling on the previous blade toward the sealed end of the previous blade.

[0016] As an improvement, the gravity lever is a zigzag shape consisting of a long arm and a short arm, with the long arm and short arm located on the same side of its hinged blade. When the long arm of the gravity lever pushes the material falling on the previous blade to the sealing end of the previous blade, the short arm of the gravity lever lifts the material falling between the sealing end of the blade and the impeller cavity wall upwards. This part of the material can achieve accumulation and sealing between the sealing end of the blade and the impeller cavity wall.

[0017] As a further improvement, the short arm of the gravity lever can be bent and deformed under external force.

[0018] In summary, this invention reduces material adhesion to the blades by using gravity-operated paddles, achieving a self-cleaning function for the blades and ensuring the airtightness of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 In Embodiment 1 of the present invention Figure 1 A sectional view;

[0021] Figure 3 for Figure 2 Enlarged view of section A;

[0022] Figure 4 In Embodiment 1 of the present invention Figure 1 A cross-sectional view from another perspective;

[0023] Figure 5 In Embodiment 2 of the present invention Figure 1 A sectional view;

[0024] Figure 6 In Embodiment 2 of the present invention Figure 1 A cross-sectional view from another perspective;

[0025] Figure 7 In Embodiment 3 of the present invention Figure 1 A sectional view;

[0026] Figure 8 In Embodiment 3 of the present invention Figure 1 A cross-sectional view from another perspective;

[0027] Figure 9 This is a schematic diagram of the gravity lever in Embodiment 3 of the present invention.

[0028] In the diagram: 10, impeller cavity; 11, feed end; 12, discharge end; 20, blade; 30, drive assembly; 31, drive shaft; 40, gravity lever; 41, limiting component; 42, long arm; 43, short arm. Detailed Implementation

[0029] Example 1

[0030] like Figures 1-4 As shown, the impeller feeder of the present invention, suitable for conveying viscous materials, has an impeller cavity 10 as its main body. A feed end 11 is provided at the top of the impeller cavity 10, and a discharge end 12 is provided at the bottom. A drive assembly 30 is disposed outside the impeller cavity 10, and the drive shaft 31 of the drive assembly 30 extends into the impeller cavity 10. Several blades 20 are provided inside the impeller cavity 10. The connecting ends of the blades 20 are fixedly connected to the drive shaft 31, and the sealing ends of the blades 20 are located on the wall of the impeller cavity 10. A gravity lever 40 is hinged to the outer edge of the sealing end of the blades 20. The gravity lever 40 is strip-shaped, and its width is the same as the width of the blades 20. To ensure that the gravity lever 40 can be smoothly reset, a limiting component 41 is provided to limit the swing amplitude of the gravity lever 40 to between 45-60°.

[0031] During operation, the impeller feeder provided by this invention is installed in the working position. After startup, material enters the impeller cavity 10 from the feed end 11. Driven by the drive assembly 30, the drive shaft 31 drives the blades 20 to rotate. The blades 20 rotate and deliver the material to the discharge end 12. Under the action of gravity, the material is discharged from the discharge end 12. During this process, the gravity deflector 40 swings between adjacent blades 20. The free end of the gravity deflector 40 can push the material falling on the previous blade to the sealing end of the previous blade, thereby reducing the adhesion of the material to the blade 20 and facilitating the falling of the material. Furthermore, since the movement direction of the hinged end of the gravity paddle 40 is opposite to the rotation direction of the drive shaft 31, the hinged end of the gravity paddle 40 can reverse the crushing of the material between the sealing end of the blade 20 and the wall of the impeller cavity 10, reducing the probability of the material falling between the sealing end of the blade 20 and the wall of the impeller cavity 10. In conjunction with the free end of the next gravity paddle 40, the material is positioned at the sealing end of the blade in an up-and-down manner, thereby ensuring the sealing effect.

[0032] The hinge between the gravity lever 40 and the blade 20 can be achieved using existing hinge methods, which will not be elaborated here.

[0033] Example 2

[0034] like Figure 5 , Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that:

[0035] 1. The limiting component 41 is no longer provided, and the length of the gravity lever 40 does not exceed the distance between the hinge point and the adjacent blade 20. Generally speaking, the length of the gravity lever 40 in this embodiment is greater than the length of the gravity lever 40 in embodiment 1.

[0036] 2. The gravity lever 40 is grid-shaped.

[0037] Example 3

[0038] like Figures 7-9 As shown, the difference between this embodiment and Embodiment 1 is that:

[0039] 1. Gravity lever 40 is hinged to the side of the blade connection end. Gravity lever 40 is a zigzag shape consisting of a long arm 42 and a short arm 43. The long arm 42 is grid-like, and the short arm 43 is a strip-shaped plate. The long arm 42 and the short arm 43 are located on the same side of the hinged blade 20, and the long arm 42 and the short arm 43 rotate in the same direction. The long arm 42 of gravity lever 40 pushes the material falling on the previous blade toward the sealing end of the previous blade, while the short arm 43 of gravity lever 40 lifts the material falling between the sealing end of the blade and the impeller cavity wall. This part of the material can accumulate and seal between the sealing end of the blade 20 and the wall of the impeller cavity 10. When the blade 20 moves to the discharge end, this part of the material is sent out from the discharge end 12. The length of the long arm 42 of gravity lever 40 does not exceed the distance between the hinge point and the adjacent blade 20 to facilitate the swing of the long arm 42.

[0040] 2. The short arm 43 of the gravity lever 40 can be bent and deformed under external force, thereby appropriately lengthening the short arm 43 so that it fits against the inner wall of the impeller cavity 10 and increases airtightness.

Claims

1. A rotor feeder suitable for feeding viscous material, comprising a rotor chamber (10) and blades (20) located in the rotor chamber (10), the rotor chamber (10) having a feeding end (11) and a discharging end (12), the rotor chamber (10) being provided with a driving assembly (30), a driving shaft (31) of the driving assembly (30) extending into the rotor chamber (10), a connecting end of the blades (20) being connected to the driving shaft (31), and a sealing end of the blades (20) being located at a wall surface of the rotor chamber (10), characterized in that: The connecting end of the blade (20) is fixed on the drive shaft (31). The sealed end of the blade (20) is hinged with a gravity lever (40). The gravity lever (40) swings between adjacent blades (20) as the drive shaft (31) rotates, so that the gravity lever (40) generates a motion trajectory opposite to the rotation direction of the drive shaft (31) at the hinge end of the gravity lever (40). At the same time, the free end of the gravity lever (40) pushes the material falling on the previous blade (20) to the sealed end of the previous blade (20). ​ 2. The impeller feeder suitable for conveying viscous materials as described in claim 1, characterized in that: The gravity lever (40) is provided with a limiting component (41) so that the swing amplitude of the gravity lever (40) is 45-60°.

3. The impeller feeder suitable for conveying viscous materials as described in claim 1, characterized in that: The gravity lever (40) is hinged to the outer edge of the sealing end of the blade (20).

4. The impeller feeder suitable for conveying viscous materials as described in claim 1, characterized in that: The gravity lever (40) is hinged to the side of the connecting end of the blade (20). The gravity lever (40) is a zigzag shape composed of a long arm (42) and a short arm (43). The long arm (42) and the short arm (43) are located on the same side of the hinged blade (20), and the long arm (42) and the short arm (43) rotate in the same direction.

5. The impeller feeder suitable for conveying viscous materials as described in claim 4, characterized in that: The length of the long arm (42) of the gravity lever (40) does not exceed the distance between the hinge point and the adjacent blade (20).

6. The impeller feeder suitable for conveying viscous materials as described in claim 1, characterized in that: The width of the gravity lever (40) is the same as the width of the blade (20).

7. The impeller feeder suitable for conveying viscous materials as described in claim 1, characterized in that: The gravity lever (40) is grid-shaped.

8. A method for improving the airtightness of an impeller feeder, using the impeller feeder as described in claim 1, characterized in that: A gravity deflector is added to the blades of the impeller feeder. The gravity deflector is hinged to the sealed end of the blade. As the drive shaft on the impeller feeder rotates, the gravity deflector generates a motion trajectory at its hinged end that is opposite to the direction of rotation of the drive shaft. At the same time, the free end of the gravity deflector pushes the material falling on the previous blade toward the sealed end of the previous blade.

9. The method for improving the airtightness of an impeller feeder as described in claim 8, characterized in that: The gravity lever is a zigzag shape consisting of a long arm and a short arm. The long arm and the short arm are located on the same side of the hinged blade. When the long arm of the gravity lever pushes the material falling on the previous blade to the sealing end of the previous blade, the short arm of the gravity lever lifts the material falling between the sealing end of the blade and the impeller cavity wall upward.

10. The method for improving the airtightness of an impeller feeder as described in claim 9, characterized in that: The short arm of the gravity lever can be bent and deformed under external force.

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