Grinding rotary screen with cleaning mechanism

Abstract

The utility model discloses a grinding rotary screen with a cleaning mechanism, which relates to the technical field of rotary screens and comprises a support frame, a screening bin is arranged on the support frame, a screening barrel is arranged in the screening bin, a screen is coated on the screening barrel, a feeding pipe is arranged at one end of the screening bin, an auger is arranged in the feeding pipe, a driving motor is arranged at one end of the auger, and a cleaning mechanism is arranged at the other end of the auger. A discharging hopper is arranged at the bottom of the screening bin, a first discharging opening is formed in one end of the discharging hopper, a second discharging pipe is arranged at the end, away from the feeding pipe, of the screening bin, a stirring mechanism is arranged at one end of the auger and comprises a stirring shaft connected with the auger, stirring teeth are arranged on the stirring shaft, and an air conveying channel is formed in the stirring shaft in the length direction. The stirring shaft is provided with a vent hole, the vent hole is communicated with the air conveying channel, the vent hole is provided with an air nozzle, one end of the stirring shaft is provided with an air connecting nozzle, and the air connecting nozzle is connected with high-pressure air through a pipeline. According to the utility model, through the air conveying channel and the air nozzle, the cleaning efficiency of the screen is improved, the blockage of meshes is avoided, and the screening efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary sieves, in particular to a grinding rotary sieve with a cleaning mechanism. Background Art

[0002] As a screening device, rotary sieves are widely used in industries such as energy, metallurgy, ceramics, construction, and chemical engineering, mainly for material screening, grading, etc.

[0003] The utility model patent with the publication number of CN 215313745 U and the publication date of December 28, 2021, discloses a circular rotary sieve, including a screening box and a sieve cylinder. A pillar is fixedly arranged at the lower end of the screening box. The right end of the sieve cylinder is fixedly connected to the output end of the motor, and the left end of the sieve cylinder is fixedly connected and rotationally connected to the inner wall of the screening box. There is a box opening on the screening box, and a box cover is arranged on the left side of the box opening. The screening box includes a main box body, a sound insulation layer, and a protective layer. The sound insulation layer is arranged between the main box body and the protective layer. A slider is arranged at the right end of the sieve cylinder. The slider and the sieve cylinder are of an integral structure, and the slider is slidably connected to the inner wall of the screening box;

[0004] This utility model can reduce the noise generated during operation and improve the operating environment; however, the following problems exist in the specific implementation process of this utility model: 1. When screening powder products of different colors and properties, the sieve mesh needs to be thoroughly cleaned each time to prevent the mixing or contamination of powders of two different colors before and after. However, since the rotary sieve is a closed device, it is very difficult and time-consuming to clean manually.

[0005] 2. Since powder coating particles are extremely easy to be electrostatically charged and there is a certain viscoelasticity between the particles, they are extremely easy to adhere to the nylon sieve mesh and block the mesh holes, which will seriously reduce the screening efficiency over time.

[0006] Therefore, there is an urgent need for a grinding rotary sieve with a cleaning mechanism to improve the cleaning efficiency of the sieve mesh and the screening efficiency. Summary of the Utility Model

[0007] In view of the above technical problems, the utility model provides a grinding rotary sieve with a cleaning mechanism to solve the problems of difficult cleaning, low cleaning efficiency of the existing rotary sieve when cleaning the sieve mesh, and low screening efficiency due to mesh hole blockage.

[0008] The above technical objectives of the utility model are achieved through the following technical solutions:

[0009] A powder grinding rotary sieve with a cleaning mechanism, comprising a support frame, a screening bin is provided on the support frame, a screening barrel is provided in the screening bin, a screen is coated on the screening barrel, a feed pipe is provided at one end of the screening bin, a screw conveyor is provided in the feed pipe, a feed hopper is provided at the top of the feed pipe, one end of the screw conveyor is provided with a driving motor through a driving belt, a blanking hopper is provided at the bottom of the screening bin, a first blanking port is provided at one end of the blanking hopper, a second blanking port is provided at the end of the screening bin away from the feed pipe, a stirring mechanism is provided at one end of the screw conveyor inside the screening barrel, the stirring mechanism includes a stirring shaft connected to the screw conveyor, a plurality of stirring teeth are circumferentially provided on the stirring shaft, one end of the stirring shaft extends to the outside of the screening bin, an air delivery channel is opened along the length direction of the stirring shaft, a plurality of groups of ventilation holes are circumferentially opened in the stirring shaft perpendicular to the axis direction, the ventilation holes communicate with the air delivery channel, a jet nozzle is provided on the ventilation hole, a gas connection nozzle is provided at one end of the stirring shaft, and the gas connection nozzle is connected to high-pressure air through a pipeline.

[0010] Further, a clamping groove is opened along the length direction on the side of the stirring tooth close to the screen, and a rubber scraper is clamped in the clamping groove.

[0011] Further, a blanking barrel is provided on the first blanking port.

[0012] Further, a lifting mechanism is provided below the support frame at the first blanking port.

[0013] Further, the lifting mechanism includes a base, a plurality of guiding members are arranged in a rectangular shape on the base, a supporting plate is horizontally provided at the top of the guiding members, a mounting frame is provided in the center on the side of the supporting plate close to the base, a pulley is rotatably provided on the mounting frame, a wedge block is provided in cooperation with the pulley, the wedge block is slidably arranged on the base, and a driving cylinder for controlling the sliding of the wedge block is provided on the base.

[0014] Further, limiting plates are provided on both sides of the pulley where the wedge block is located.

[0015] Further, a guiding ring is provided on the supporting plate, and the guiding ring includes a semi-circular positioning ring, and guiding plates are provided at both ends of the positioning ring.

[0016] In summary, the beneficial technical effects of the present utility model are as follows:

[0017] (1) The external high-pressure air is introduced into the air delivery channel through the gas connection nozzle, and then the high-pressure air is sprayed onto the screen through the jet nozzle. At the same time, the driving motor drives the stirring shaft to rotate, finally realizing the blowing of the powder on the screen. This not only improves the cleaning of the powder on the screen, but also can blow the powder in the mesh holes clean, avoiding blockage and improving the screening efficiency.

[0018] (2) By installing rubber scraping plates on the stirring teeth, the rigidity when the stirring teeth contact the screen is reduced, and damage to the screen by the stirring teeth is avoided.

[0019] (3) The blanking bucket can collect the blown-off powder, preventing the powder from spreading randomly in the workshop. At the same time, the lifting mechanism improves the sealing performance between the blanking bucket and the first blanking port, preventing powder from escaping.

[0020] (4) The guiding ring can achieve a concentric effect between the blanking bucket and the first blanking port, avoiding misalignment between the two. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is Figure 1 a schematic diagram with the screening bin hidden;

[0023] Figure 3 is Figure 2 a schematic diagram with the screening barrel hidden;

[0024] Figure 4 is a schematic diagram of the internal structure of the stirring mechanism;

[0025] Figure 5 is a schematic diagram of the lifting mechanism.

[0026] Reference Signs: 1, support frame; 2, screening bin; 3, screening barrel; 4, screen; 5, blanking hopper; 6, first blanking port; 7, blanking bucket; 8, second blanking port; 9, feed pipe; 10, feed hopper; 11, auger; 12, drive motor; 13, stirring shaft; 14, stirring teeth; 15, air delivery channel; 16, air connection nozzle; 17, air jet nozzle; 18, rubber scraping plate; 19, lifting mechanism; 20, base; 21, guiding member; 22, support plate; 23, slide rail; 24, wedge block; 25, pulley; 26, drive cylinder; 27, limit plate; 28, positioning ring; 29, guiding plate. Detailed Embodiments

[0027] The present utility model will be clearly and completely described below in conjunction with the embodiments.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In the description of the embodiments, unless otherwise clearly specified and defined, terms such as "arranged" and "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or connected through an intermediate medium, and may also be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] See the attached Figures 1-5 , which shows a grinding and rotating sieve with a cleaning mechanism, including a support frame 1. A screening bin 2 is arranged on the support frame 1. A blanking hopper 5 is arranged at the bottom of the screening bin 2. A first blanking port 6 is arranged at the lower end of the blanking hopper 5, and the first blanking port 6 is used to drop and collect the screened fine materials. A second blanking port 8 is arranged at one end of the screening bin 2, and the second blanking port 8 is used to collect coarse materials;

[0031] A screening barrel 3 is arranged in the screening bin 2. A screen 4 is covered on the screening barrel 3. One end of the screening bin 2 far from the second blanking port 8 is connected with a feed pipe 9. A feed hopper 10 is arranged at the top of the feed pipe 9. An auger 11 is arranged in the feed pipe 9. One end of the auger 11 is connected with a drive motor 12 through a drive belt. When screening, the powder is poured into the feed hopper 10, and then the drive motor 12 drives the auger 11 to convey the powder into the screen 4. At the same time, a stirring mechanism is arranged at one end of the auger 11 located in the screening barrel 3. The stirring mechanism includes a stirring shaft 13. Three stirring teeth 14 are arranged on the circumference of the stirring shaft 13. The length of the stirring teeth 14 is the same as the width of the screen 4. When screening, when the powder reaches inside the screen 4, the drive auger 11 drives the stirring mechanism to rotate. The stirring mechanism uses the stirring teeth 14 to continuously stir the powder on the screen 4 for screening. In this way, the fine materials fall through the mesh holes from the first blanking port 6, while the coarse materials are discharged through the second blanking port 8;

[0032] One end of the stirring shaft 13 extends to the outside of the screening bin 2. An air delivery channel 15 is provided along the length direction of the stirring shaft 13. One end of the air delivery channel 15 located outside the screening bin 2 is threadedly connected with an air connection nozzle 16. Through the air connection nozzle 16, high-pressure air from the outside can be led into the air delivery channel 15. The air connection nozzle 16 is specifically a gas quick connector, which is a male-female connector. That is, there is also a connector provided on the air connection nozzle 16, and this connector is connected to the high-pressure air pipeline. When the two are assembled, they can rotate 360 degrees while ensuring air ventilation, thus avoiding the problem of pipeline knotting. A number of ventilation holes are circumferentially provided on the stirring shaft 13, and jet nozzles 17 are welded and fixed on the ventilation holes. When cleaning the sieve mesh 4, high-pressure air from the outside is led from the air connection nozzle 16 into the air delivery channel 15, and then the high-pressure air is ejected from the jet nozzles 17 and acts on the sieve mesh 4 for purging. While purging, the driving motor 12 is used to drive the stirring mechanism to rotate, further improving the quality of purging. In this way, the cleaning efficiency and quality of the sieve mesh 4 are improved, the mixing and pollution between powders are avoided, and at the same time, the powders adhering to the mesh holes can be purged clean by the high-pressure air, avoiding the blockage of the mesh holes and ensuring the screening efficiency;

[0033] At the same time, clamping grooves are provided along the length direction of the stirring teeth 14, and rubber scraping plates 18 are clamped in the clamping grooves. The rubber scraping plates 18 reduce the rigidity between the stirring teeth 14 and the sieve mesh 4, effectively preventing the stirring teeth 14 from damaging the sieve mesh 4;

[0034] At the same time, in order to prevent the powders from escaping randomly in the workshop when cleaning the sieve mesh 4, a blanking bucket 7 is provided on the first blanking port 6. The powders purged down can be collected through the blanking bucket 7 to prevent escape;

[0035] At the same time, in order to improve the sealing performance between the blanking bucket 7 and the first blanking port 6, a sealing ring is provided on the first blanking port 6. In addition, a lifting mechanism 19 is provided below the support frame 1 where the blanking bucket 7 is located. The gap between the blanking bucket 7 and the first blanking port 6 is controlled through the lifting mechanism 19, thereby ensuring the sealing performance;

[0036] Among them, the lifting mechanism 19 includes a base 20. A guiding member 21 is respectively provided at each of the four corners of the base 20. The guiding member 21 includes a guiding tube and a guiding rod. A supporting plate 22 is horizontally provided at the top of the four guiding members 21. A mounting bracket is provided at the center of the side of the supporting plate 22 close to the base 20. A pulley 25 is rotatably provided on the mounting bracket. At the same time, a slide rail 23 is provided at the position of the base 20 corresponding to the pulley 25. A wedge block 24 with a right trapezoidal structure is slidably provided on the slide rail 23. The pulley 25 is in abutting cooperation with the inclined surface of the wedge block 24. At the same time, a driving cylinder 26 for controlling the wedge block 24 to slide along the slide rail 23 is provided on the base 20. During use, the wedge block 24 is pushed forward by the driving cylinder 26. The wedge block 24 further acts on the pulley 25 to lift the supporting plate 22 upward through the mounting bracket, thereby moving the blanking bucket 7 closer to the first blanking port 6.

[0037] In addition, a guiding ring is provided on the supporting plate 22. The guiding ring includes a semi-circular positioning ring 28. Guide plates 29 are provided at both ends of the positioning ring 28. When placing the blanking bucket 7, the blanking bucket 7 is placed between the two guide plates 29 and then pushed into the positioning ring 28. At this time, the blanking cylinder is exactly concentric with the first blanking port 6. Therefore, through the positioning function provided by the guiding ring to the blanking bucket 7, the blanking bucket 7 is prevented from being misaligned with the first blanking port 6 at the same time.

[0038] At the same time, in order to prevent the pulley 25 from falling off the wedge block 24, limiting plates 27 are provided on both sides of the wedge block 24 where the pulley 25 is located. The limiting plates 27 can prevent the pulley 25 from being misaligned with the wedge block 24 and also provide a guiding function for the pulley 25 at the same time.

[0039] During use, first, the second blanking port 8 is blocked by a rubber plug, which can prevent powder from escaping from the second blanking port 8 during purging. Then, the driving cylinder 26 is used to control the wedge block 24 to slide outwards along the slide rail 23 to lower the supporting plate 22. Then, the blanking bucket 7 is placed into the positioning ring 28. Then, the blanking bucket 7 is lifted again by the driving cylinder 26 and abutted against the first blanking port 6. Then, external high-pressure air is connected to the air connection nozzle 16 and introduced into the air delivery channel 15. At this time, the high-pressure air is sprayed onto the screen 4 through the jet nozzle 17 for purging. While purging, the driving motor 12 is started to drive the entire stirring mechanism to rotate, so that the entire screen 4 can be purged without dead angles. Thereby, the efficiency and quality of purging are ensured, and at the same time, the powder adhering to the mesh holes can be cleaned up, ensuring the screening efficiency.

[0040] The above is only the preferred specific implementation manner of the present invention, and does not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A grinding and rotating sieve with a cleaning mechanism, comprising a support frame (1), a screening bin (2) is provided on the support frame (1), a screening barrel (3) is arranged in the screening bin (2), a screen mesh (4) is coated on the screening barrel (3), a feed pipe (9) is arranged at one end of the screening bin (2), an auger (11) is arranged in the feed pipe (9), a feed hopper (10) is arranged at the top of the feed pipe (9), one end of the auger (11) is provided with a drive motor (12) through a drive belt, a blanking hopper (5) is arranged at the bottom of the screening bin (2), a first blanking port (6) is arranged at one end of the blanking hopper (5), a second blanking port (8) is arranged at the end of the screening bin (2) far from the feed pipe (9), and the characteristics are as follows: One end of the auger (11) is located inside the screening barrel (3) and is provided with a stirring mechanism. The stirring mechanism includes a stirring shaft (13) connected to the auger (11). A plurality of stirring teeth (14) are arranged circumferentially on the stirring shaft (13). One end of the stirring shaft (13) extends to the outside of the screening bin (2). An air delivery channel (15) is arranged along the length direction of the stirring shaft (13). A plurality of groups of ventilation holes are arranged circumferentially in a direction perpendicular to the axis of the stirring shaft (13). The ventilation holes communicate with the air delivery channel (15). A jet nozzle (17) is arranged on the ventilation holes. An air connection nozzle (16) is arranged at one end of the stirring shaft (13). The air connection nozzle (16) is connected to high-pressure air through a pipeline.

2. The rotary grinding sieve with a cleaning mechanism according to claim 1, characterized in that: A clamping groove is arranged along the length direction on the side of the stirring tooth (14) close to the screen (4). A rubber scraper (18) is clamped in the clamping groove.

3. The rotary grinding sieve with a cleaning mechanism according to claim 1, characterized in that: A blanking bucket (7) is arranged on the first blanking port (6).

4. A powder grinding rotary sieve with a cleaning mechanism according to claim 1, characterized in that: A lifting mechanism (19) is arranged below the support frame (1) at the first blanking port (6).

5. The rotary grinding sieve with a cleaning mechanism according to claim 4, wherein: The lifting mechanism (19) includes a base (20). A plurality of guide members (21) are arranged in a rectangular pattern on the base (20). A support plate (22) is horizontally arranged at the top of the guide members (21). An installation frame is arranged in the center on the side of the support plate (22) close to the base (20). A pulley (25) is rotatably arranged on the installation frame. A wedge block (24) is arranged in cooperation with the pulley (25). The wedge block (24) is slidably arranged on the base (20). A driving cylinder (26) for controlling the sliding of the wedge block (24) is arranged on the base (20).

6. The rotary flour sieve with a cleaning mechanism according to claim 5, characterized in that: Limiting plates (27) are arranged on both sides of the pulley (25) where the wedge block (24) is located.

7. A powder grinding rotary sieve with a cleaning mechanism according to claim 5, characterized in that: A guide ring is arranged on the support plate (22). The guide ring includes a semi-circular positioning ring (28). Guide plates (29) are arranged at both ends of the positioning ring (28).

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