A rotary vibrating screen with automatic feeding device

Abstract

The application discloses a rotary vibration screen with an automatic feeding device and belongs to the technical field of automatic feeding, which comprises a base and a rotary vibration screen body fixedly installed on the top of the base, a stand is fixedly installed on the top of the base, a height adjusting mechanism is arranged on the stand, a mounting rack is arranged on the height adjusting mechanism, an automatic feeding device is fixedly installed on the mounting rack, and the height adjusting mechanism is used for adjusting the height of the mounting rack so as to adjust the height of the automatic feeding device and realize automatic material taking. Through cooperation of the height adjusting mechanism and the automatic feeding device, the whole process automation from automatic material taking in the storage barrel to conveying to the rotary vibration screen body is realized, manual intervention is not needed, production efficiency is remarkably improved, and manpower cost is saved.

Description

Technical Field

[0001] This invention relates to the field of automatic feeding technology, specifically to a rotary vibrating screen with an automatic feeding device. Background Technology

[0002] Currently, in grain processing, the rotary vibrating screen (vibrating sieve / rotary vibrating screen separator) is a key piece of equipment, mainly used for particle grading, impurity removal, and screening. The rotary vibrating screen is a high-precision fine powder screening machine with a fully enclosed structure, suitable for screening and filtering granular and powdery materials. It uses a vertical motor as the excitation source, with eccentric weights installed at both the upper and lower ends of the motor. This converts the motor's rotational motion into a three-dimensional motion (horizontal, vertical, and inclined), which is then transmitted to the screen surface. Adjusting the phase angle at the upper and lower ends can change the trajectory of the material on the screen surface.

[0003] For example, Chinese patent application number 201720942763.7 discloses a vibrating screen with an automatic feeding device, including an automatic feeding device for conveying materials and a vibrating screen for high-precision fine powder screening. The automatic feeding device has baffles on both sides of the conveyor belt to prevent large amounts of ore from scattering during feeding. The use of a conveyor belt automates the feeding process, and the discharge port promptly feeds the conveyed ore into the vibrating screen. The entire device has a simple structure, is easy to use, and can automate feeding in mining production, improving production efficiency and saving significant manpower. The discharge port at the bottom of the automatic feeding device is connected to the feeding port at the top of the vibrating screen via a connecting cylinder. The vibrating screen with the automatic feeding device features a dust cover to effectively prevent dust from entering the machine, a fan to cool the vibrating motor, and a dustproof cloth to prevent dust from entering the vibrating motor and affecting its normal operation.

[0004] For example, Chinese patent application number 202021225643.3 discloses a vibrating screen with automatic feeding, comprising: a vibrating screen having a feed inlet at its top; a screw conveyor having a discharge pipe and a feed pipe; a crushing device disposed on the feed pipe for crushing the material inside the feed pipe; the discharge pipe corresponding to the feed inlet, the top of the feed pipe having a feed hopper, and the discharge pipe having a discharge dust collection hood corresponding to the feed inlet; when working, the operator directly puts a large amount of material into the feed hopper, the material enters the feed pipe from the feed hopper, and is conveyed by the screw conveyor to the discharge pipe and falls down into the feed inlet; the dust generated after the material enters the vibrating screen is collected by the discharge dust collection hood and then promptly absorbed and treated by the negative pressure dust removal device, preventing dust from escaping and polluting the environment and causing harm to the operator.

[0005] Although some existing vibrating screens are equipped with automatic feeding devices that can transport the material to be screened to the feed inlet of the vibrating screen, the automatic feeding devices on the existing vibrating screens do not have an automatic material handling function. Often, the staff needs to manually or use auxiliary machines to first pour the material to be conveyed into the feed hopper of the automatic feeding device. It cannot achieve fully automatic feeding and still has certain shortcomings that need to be improved. Moreover, the process of pouring the material into the feed hopper of the automatic feeding device is not only time-consuming and labor-intensive, but also easily causes dust to spread and pollute the working environment.

[0006] Therefore, it is necessary to provide a vibrating screen with an automatic feeding device to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this invention is to provide a rotary vibrating screen with an automatic feeding device to solve the problem that the automatic feeding device on the existing rotary vibrating screen does not have an automatic material picking function. It often requires the operator to manually or use auxiliary machines to first pour the material to be conveyed into the feed hopper of the automatic feeding device, which cannot achieve fully automatic feeding. Moreover, the process of pouring the material into the feed hopper of the automatic feeding device is not only time-consuming and labor-intensive, but also easily causes dust to spread and pollute the working environment.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a vibrating screen with an automatic feeding device, comprising a base and a vibrating screen body fixedly installed on the top of the base, a support frame fixedly installed on the top of the base, a height adjustment mechanism provided on the support frame, a mounting frame provided on the height adjustment mechanism, and an automatic feeding device fixedly installed on the mounting frame. The height adjustment mechanism is used to adjust the height of the mounting frame to adjust the height of the automatic feeding device for automatic material handling.

[0009] The top of the base is provided with a positioning groove, and a storage bucket is movably placed inside the positioning groove.

[0010] As a further description of the above technical solution: the automatic feeding device includes a feeding cylinder with an open bottom end, the feeding cylinder is fixedly installed on the mounting frame, and the opening at the bottom end of the feeding cylinder is a material inlet. The feeding cylinder is provided with a feeding mechanism inside, and a feeding pipe is fixedly connected to one side of the feeding cylinder near the top end.

[0011] As a further description of the above technical solution: the feeding pipe is arranged at an inclination, and the end of the feeding pipe near the conveying cylinder is higher than the other end.

[0012] As a further description of the above technical solution: the end of the feeding pipe away from the conveying cylinder is connected to a telescopic pipe through a flange, the other end of the telescopic pipe is fixedly fitted with a disc and a fixing frame, a number of multi-stage telescopic rods are fixedly connected between the disc and the flange, the fixing frame is fixedly connected to the upright frame and is used to limit and fix the bottom end of the telescopic pipe, and the bottom end of the telescopic pipe is movably inserted into the feeding port at the top of the vibrating screen body.

[0013] As a further description of the above technical solution: the material conveying mechanism includes a drive motor fixedly installed at the top of the material conveying cylinder. The output end of the drive motor is fixedly connected to a rotating shaft. The other end of the rotating shaft rotates through the material conveying cylinder and extends into the interior of the material conveying cylinder. A spiral conveying blade is fixedly sleeved on one end of the rotating shaft extending into the interior of the material conveying cylinder.

[0014] As a further description of the above technical solution: a support frame is fixedly connected to the inner wall of the conveying cylinder near the bottom end, and the rotating shaft is rotatably mounted on the support frame.

[0015] As a further description of the above technical solution: the height adjustment mechanism includes a drive motor and two guide rods fixedly installed. A threaded rod is fixedly connected to the output end of the drive motor. A threaded block is threadedly connected to the outer surface of the threaded rod. A guide block is fixedly sleeved on the outer surface of the threaded block. The guide block is movably sleeved on the outer surface of the two guide rods. The mounting bracket is fixedly connected to the guide block by bolts. The threaded rod is disposed between the two guide rods.

[0016] As a further description of the above technical solution: a control box is installed on the front of the upright frame, a control panel is installed on the front of the control box, and a PLC controller is installed inside the control box. A pressure sensor is installed on the outer side of the conveying cylinder near the bottom. A fixing block is fixedly connected to one side of the conveying cylinder. A vertical rod is movably passed through the fixing block. A mounting base and a limiting block are fixedly connected to the bottom and top of the vertical rod, respectively. A pressure sensor is fixedly connected to the bottom of the mounting base. A flexible spring is fixedly connected between the mounting base and the fixing block. The pressure sensor is located between the pressure sensor and the bottom of the rotating shaft.

[0017] As a further description of the above technical solution: the upright is provided with an anti-rotation mechanism, which includes an electric telescopic rod and an anti-rotation gear. The telescopic end of the electric telescopic rod is fixedly connected with an anti-rotation locking tooth. The electric telescopic rod is fixedly installed on the front of the upright. The anti-rotation locking tooth is movably inserted into the corresponding tooth groove on the anti-rotation gear. The anti-rotation gear is coaxially and fixedly connected to the bottom end of the threaded rod.

[0018] As a further description of the above technical solution: the bottom end of the rotating shaft is provided with a rodent-proof hole mechanism, the rodent-proof hole mechanism includes a connecting frame fixedly connected to the bottom end of the rotating shaft, and an arc-shaped material-pulling plate fixedly connected to the other end of the connecting frame.

[0019] The present invention has the following beneficial effects:

[0020] 1. Fully automatic feeding function: Through the cooperation of height adjustment mechanism and automatic feeding device, the entire process of automatically picking up materials from storage bin and conveying them to the vibrating screen body is fully automated, without manual intervention, which significantly improves production efficiency and saves labor costs.

[0021] 2. Precise control of material feeding depth: By using pressure sensor 1, pressure sensor 2, flexible spring, vertical rod and PLC controller in a coordinated manner, the depth of the feeding cylinder inserted into the grain storage bin can be precisely controlled, avoiding excessive load on the equipment due to excessive insertion and extending the service life of the equipment.

[0022] 3. Anti-rotation mechanism ensures stability: The anti-rotation mechanism locks the threaded rod to prevent the height adjustment mechanism from rotating due to equipment vibration or unexpected situations, thereby ensuring the stability of the automatic feeding device during operation.

[0023] 4. Anti-rat hole mechanism optimizes material handling: The arc-shaped material feeding plate design effectively avoids the phenomenon of "rat holes" or "inverted cone-shaped holes" in the grain in the storage bin, ensuring that the grain in the storage bin can be conveyed at the same height.

[0024] 5. Reduce dust pollution: Through the combined use of automatic feeding device and height adjustment mechanism, the material can be automatically picked up and transported to the inside of the vibrating screen body for grain screening and filtration. There is no need to manually or mechanically pour the grain into the feed hopper on the automatic feeding device first. This not only simplifies the operation steps and saves time and labor, but also effectively prevents dust from spreading and avoids dust pollution of the working environment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a rotary vibrating screen with an automatic feeding device proposed in this invention;

[0026] Figure 2 This is a three-dimensional schematic diagram of the overall structure of a rotary vibrating screen with an automatic feeding device proposed in this invention from another angle.

[0027] Figure 3 This is a three-dimensional schematic diagram of the base and positioning groove of a rotary vibrating screen with an automatic feeding device proposed in this invention.

[0028] Figure 4This is a three-dimensional schematic diagram of the structure of a rotary vibrating screen with an automatic feeding device, including its frame and height adjustment mechanism, as proposed in this invention.

[0029] Figure 5 This is a three-dimensional schematic diagram of the height adjustment mechanism and mounting frame of a vibrating screen with an automatic feeding device proposed in this invention;

[0030] Figure 6 This is a three-dimensional schematic diagram of an automatic feeding device for a vibrating screen with an automatic feeding mechanism, as proposed in this invention.

[0031] Figure 7 This is a three-dimensional schematic diagram of the mounting frame and guide block of a rotary vibrating screen with an automatic feeding device proposed in this invention;

[0032] Figure 8 This is a three-dimensional schematic diagram of the structure of a rotary vibrating screen with an automatic feeding device, including the feeding pipe and telescopic pipe, as proposed in this invention.

[0033] Figure 9 This is a three-dimensional schematic diagram of the fixed block and conveying cylinder of a rotary vibrating screen with an automatic feeding device proposed in this invention;

[0034] Figure 10 This is a three-dimensional schematic diagram of the structure of a vibrating screen with an automatic feeding device, including its frame and anti-rotation mechanism, as proposed in this invention.

[0035] Figure 11 This is an exploded view of an anti-rotation mechanism for a vibrating screen with an automatic feeding device proposed in this invention.

[0036] Figure 12 This is a three-dimensional schematic diagram of the material conveying cylinder and rodent-proof hole mechanism of a rotary vibrating screen with an automatic feeding device proposed in this invention.

[0037] Figure 13 This is a three-dimensional schematic diagram of the structure of a vibrating screen with an automatic feeding device, including the rotating shaft and connecting frame, as proposed in this invention.

[0038] In the diagram: 1. Base; 2. Vibrating screen body; 3. Stand; 4. Height adjustment mechanism; 41. Drive motor II; 42. Guide rod; 43. Threaded rod; 44. Threaded block; 45. Guide block; 5. Mounting frame; 6. Automatic feeding device; 61. Conveying cylinder; 62. Feeding port; 63. Conveying mechanism; 631. Drive motor I; 632. Rotating shaft; 633. Screw conveyor blade; 64. Feeding pipe; 65. Flange; 66. Telescopic pipe; 67. Disc; 68. Fixing frame; 69. Multiple 6. Telescopic rod; 7. Support frame; 8. Positioning groove; 9. Storage bin; 10. Control box; 11. Control panel; 12. PLC controller; 13. Pressure sensor one; 14. Anti-rotation mechanism; 15. Electric telescopic rod; 16. Anti-rotation gear; 17. Anti-rotation tooth; 18. Anti-rodent hole mechanism; 19. Connecting frame; 20. Arc-shaped material feeding plate; 11. Fixing block; 12. Vertical rod; 13. Mounting base; 14. Limiting block; 15. Pressure sensor two; 26. Flexible spring. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] As attached Figure 1 To be continued Figure 9 As shown, the present invention provides a rotary vibrating screen with an automatic feeding device, including a base 1 and a rotary vibrating screen body 2 fixedly installed on the top of the base 1. The rotary vibrating screen body 2 adopts existing mature technology. Its specific structure and working principle can be referred to the Chinese invention patent with authorization announcement number: CN114101022B and title: A planar rotary vibrating screen for grain processing. A stand 3 is fixedly installed on the top of the base 1. A height adjustment mechanism 4 is provided on the stand 3. A mounting frame 5 is provided on the height adjustment mechanism 4. An automatic feeding device 6 is fixedly installed on the mounting frame 5. The height adjustment mechanism 4 is used to adjust the height of the mounting frame 5 so as to adjust the height of the automatic feeding device 6 for automatic material picking.

[0042] The top of the base 1 is provided with a positioning groove 7, and the storage bin 8 is movably placed inside the positioning groove 7. The maximum distance at which the height adjustment mechanism 4 drives the automatic feeding device 6 to descend is slightly greater than the distance between the bottom end of the automatic feeding device 6 (i.e. the bottom end of the rotating shaft 632) and the bottom of the inner wall of the storage bin 8. This ensures that when the height adjustment mechanism 4 drives the automatic feeding device 6 to descend to the lowest height, there is still a small gap between the bottom end of the rotating shaft 632 and the bottom of the inner wall of the storage bin 8, so as to avoid the automatic feeding device 6 colliding with the inner wall of the storage bin 8 and causing damage.

[0043] The automatic feeding device 6 includes a conveying cylinder 61 with an open bottom. The conveying cylinder 61 is fixedly installed on the mounting frame 5, and the opening at the bottom of the conveying cylinder 61 is a material inlet 62. The conveying cylinder 61 is equipped with a conveying mechanism 63, and a feeding pipe 64 is fixedly connected to one side of the conveying cylinder 61 near the top. The feeding pipe 64 is inclined, and the end of the feeding pipe 64 near the conveying cylinder 61 is higher than the other end, so that the grain can flow to the telescopic pipe 66 by gravity. The grain enters the feeding pipe 64 under the push of the screw conveyor blade 633, and naturally slides into the telescopic pipe 66 due to the inclined design, and then feeds the grain into the vibrating screen body 2.

[0044] One end of the feeding pipe 64 away from the conveying cylinder 61 is connected to a telescopic pipe 66 via a flange 65. The other end of the telescopic pipe 66 is fixedly fitted with a disc 67 and a fixing frame 68. Several multi-stage telescopic rods 69 are fixedly connected between the disc 67 and the flange 65. The fixing frame 68 is fixedly connected to the upright frame 3 and is used to limit and fix the bottom end of the telescopic pipe 66. The bottom end of the telescopic pipe 66 is movably inserted into the feeding port at the top of the vibrating screen body 2. The arrangement of multiple multi-stage telescopic pipes 66 can form a barrier on the outside of the telescopic pipe 66, so that the telescopic pipe 66 can be located between multiple telescopic rods when it is telescopic. This is conducive to the telescopic pipe 66 telescopically telescopically extending and retracting as much as possible along the vertical direction, avoiding bending to one side and affecting the delivery of grain by the telescopic pipe 66.

[0045] The material conveying mechanism 63 includes a drive motor 631 fixedly installed at the top of the material conveying cylinder 61. The output end of the drive motor 631 is fixedly connected to a rotating shaft 632. The other end of the rotating shaft 632 rotates through the material conveying cylinder 61 and extends into the interior of the material conveying cylinder 61. A spiral conveying blade 633 is fixedly sleeved on one end of the rotating shaft 632 that extends into the interior of the material conveying cylinder 61.

[0046] The output of the drive motor 631 rotates clockwise, driving the rotating shaft 632 to rotate, and driving the screw conveyor blade 633 to rotate synchronously. The grain to be screened and filtered in the storage hopper 8 is then conveyed upward through the screw conveyor blade 633 and the inside of the conveying cylinder 61. When the grain in the conveying cylinder 61 moves to the position of the feeding pipe 64, the grain will be conveyed through the feeding pipe 64 to the telescopic pipe 66, and then conveyed from the feeding port at the top of the vibrating screen body 2 to the inside of the vibrating screen body 2 through the telescopic pipe 66, so that the grain can be screened and filtered through the vibrating screen body 2.

[0047] A support frame 610 is fixedly connected to the inner wall of the conveying cylinder 61 near the bottom. The rotating shaft 632 is rotatably mounted on the support frame 610. The support frame 610 can support the rotating shaft 632, avoid the lack of support at the end away from the drive motor 631, improve the stability of the rotating shaft 632 during rotation, and ensure the smooth operation of the screw conveyor blade 633.

[0048] The height adjustment mechanism 4 includes a drive motor 41 and two guide rods 42, which are fixedly installed. A threaded rod 43 is fixedly connected to the output end of the drive motor 41. A threaded block 44 is threadedly connected to the outer surface of the threaded rod 43. A guide block 45 is fixedly sleeved on the outer surface of the threaded block 44. The guide block 45 is movably sleeved on the outer surface of the two guide rods 42. The mounting bracket 5 is fixedly connected to the guide block 45 by bolts. The threaded rod 43 is located between the two guide rods 42.

[0049] A control box 9 is mounted on the front of the support frame 3. A control panel 10 is mounted on the front of the control box 9, and a PLC controller 11 (not shown in the figure) is installed inside the control box 9. A pressure sensor 12 is installed on the outside of the feeding cylinder 61 near the bottom. A fixing block 15 is fixedly connected to one side of the feeding cylinder 61. A vertical rod 16 is movably passed through the fixing block 15. A mounting base 17 and a limiting block 18 are fixedly connected to the bottom and top of the vertical rod 16, respectively. A pressure sensor 29 is fixedly connected to the bottom of the mounting base 17. A flexible spring 20 is fixedly connected between the mounting base 17 and the fixing block 15. The pressure sensor 29 is located between the pressure sensor 12 and the bottom of the rotating shaft 632. In actual application, an enlarged panel can be added to the bottom of the pressure sensor 12 and the pressure sensor 29 to increase the contact surface with the grain, thereby increasing the damping of the pressure sensor embedded in the grain and preventing the pressure sensor from embedding into the grain after contact.

[0050] Pressure sensor 12, pressure sensor 219, and drive motor 241 are all electrically connected to PLC controller 11, and vibrating screen body 2, drive motor 1631, and drive motor 241 are electrically connected to control panel 10.

[0051] Working principle: When using the rotary vibrating screen with automatic feeding device to screen and filter impurities in grain, the staff first places the storage bucket 8 containing the grain to be screened and filtered into the positioning groove 7 at the top of the base 1, and the positioning groove 7 limits and fixes the storage bucket 8 in the horizontal direction.

[0052] Then, the vibrating screen body 2 is started via control panel 10. Simultaneously, drive motor 1 (631) and drive motor 2 (41) are started via control panel 10. The output end of drive motor 2 (41) rotates clockwise, causing the threaded rod 43 to rotate. Under the limiting action of guide rod 42 and guide block 45 on threaded block 44, it slowly moves downwards along the axial direction of threaded rod 43 until the bottom end of conveying cylinder 61 is inserted into the grain in storage hopper 8. The downward movement of conveying cylinder 61 causes pressure sensor 1 (12) and pressure sensor 2 (19) to move downwards synchronously. The bottom end of conveying cylinder 61 first contacts the grain, then pressure sensor 2 (19) contacts the grain. As conveying cylinder 61 continues to move downwards, pressure sensor 2 (19) receives pressure from the grain. The obstruction prevents further downward movement, causing pressure sensor 19 to move upward relative to fixed block 15, compressing and storing energy in flexible spring 20. When the bottom of conveying cylinder 61 is inserted into the grain to a certain depth, the bottom of pressure sensor 12 comes into contact with the top of the grain. Pressure sensor 12 is compressed and transmits data to PLC controller 11. PLC controller 11 then shuts off drive motor 41 to prevent conveying cylinder 61 from being inserted too deeply into the grain in storage hopper 8. The deeper the insertion, the greater the resistance encountered by conveying cylinder 61 as it moves downward. By precisely controlling the depth of conveying cylinder 61 into the grain, the load on height adjustment mechanism 4 is not increased due to excessive insertion, thus preventing damage.

[0053] After the feeding cylinder 61 is inserted into the grain in the storage hopper 8, the output end of the drive motor 631 rotates clockwise, driving the rotating shaft 632 to rotate, and driving the screw conveyor blade 633 to rotate synchronously. Then, through the screw conveyor blade 633 and the inside of the feeding cylinder 61, the grain to be screened and filtered in the storage hopper 8 is conveyed upward. When the grain in the feeding cylinder 61 moves to the position of the feeding pipe 64, the grain will be conveyed through the feeding pipe 64 to the telescopic pipe 66, and then conveyed from the feeding port at the top of the vibrating screen body 2 to the inside of the vibrating screen body 2 through the telescopic pipe 66, and then the grain is screened and filtered through the vibrating screen body 2.

[0054] When the automatic feeding device 6 automatically picks up the grain from the storage bin 8 and transports it into the vibrating screen body 2, the amount of grain to be screened and filtered in the storage bin 8 will continuously decrease, and the upper surface of the grain in the storage bin 8 will drop accordingly. At this time, the elastic force of the flexible spring 20 pushes the mounting base 17 and the limiting block 18 to move down relative to the fixed block 15, and drives the pressure sensor 19 to move down synchronously until the bottom of the limiting block 18 moves to abut against the top of the fixed block 15. At this time, the limiting block 18 can no longer move down relative to the fixed block 15, and similarly, the pressure sensor 19 can no longer move down relative to the fixed block 15. At this time, the upper surface of the grain in the storage bin 8 is still continuously dropping as the automatic feeding device 6 picks up and transports the grain. When the upper surface of the grain in the storage bin 8 is separated from the pressure sensor 19, the pressure sensor 19 transmits data to the PLC controller 11, which activates the height adjustment mechanism 4 and drives the conveying cylinder 61 to move down again until the pressure sensor 19 is released from the fixed block 15. Force sensor 12 is subjected to the squeezing force from the upper surface of the grain. Then, PLC controller 11 shuts down the height adjustment mechanism 4. This allows the automatic control of the height adjustment mechanism 4 to operate when the bottom of the conveying cylinder 61 is about to detach from the upper surface of the grain in the storage hopper 8, i.e., when the depth of the conveying cylinder 61 inserted into the grain is shallow. This drives the conveying cylinder 61 and the conveying mechanism 63 to move down by the distance between pressure sensor 12 and pressure sensor 19. This achieves automatic intermittent and equidistant downward movement of the conveying cylinder 61 and the conveying mechanism 63. This ensures that the conveying cylinder 61 and the conveying mechanism 63 cooperate to continuously and automatically pick up materials, avoiding the situation where the conveying cylinder 61 completely exits the upper surface of the grain in the storage hopper 8 and cannot pick up materials normally. It also avoids the conveying cylinder 61 being inserted too deeply into the grain in the storage hopper 8, which would increase the load on the height adjustment mechanism 4. This ensures that the height adjustment mechanism 4 can operate within the load range, avoiding damage caused by high load operation and improving the service life of the height adjustment mechanism 4.

[0055] Example 2:

[0056] As attached Figure 10 and attached Figure 11 As shown, this embodiment is basically the same as the previous embodiment, except that the support frame 3 is provided with an anti-rotation mechanism 13. The anti-rotation mechanism 13 includes an electric telescopic rod 131 and an anti-rotation gear 132. The telescopic end of the electric telescopic rod 131 is fixedly connected with an anti-rotation locking tooth 133. The electric telescopic rod 131 is fixedly installed on the front of the support frame 3. The anti-rotation locking tooth 133 is movably inserted into the corresponding tooth groove on the anti-rotation gear 132. The anti-rotation gear 132 is coaxially fixedly connected to the bottom end of the threaded rod 43.

[0057] The electric telescopic rod 131 is electrically connected to the PLC controller 11. When the drive motor 41 needs to be started, the PLC controller 11 first opens the electric telescopic rod 131 to retract it, causing the anti-rotation locking tooth 133 to disengage from the tooth groove on the anti-rotation gear 132, thus releasing the limit fixation on the anti-rotation gear 132. Then, the PLC controller 11 starts the drive motor 41 to prevent the height adjustment mechanism 4 from running and causing operational interference when the anti-rotation mechanism 13 is not released from locking the threaded rod 43. When the height adjustment mechanism 4 needs to be stopped, the PLC controller 11 first shuts off the drive motor 41, and then starts the electric telescopic rod 131 to extend it, causing the anti-rotation locking tooth 133 to re-insert into the corresponding tooth groove on the anti-rotation gear 132, thus limiting and fixing the anti-rotation gear 132. This prevents the threaded rod 43 from rotating due to equipment vibration when the height adjustment mechanism 4 is not running, thereby ensuring the stability of the automatic feeding device 6.

[0058] Example 3:

[0059] As attached Figure 12 and attached Figure 13 As shown, this embodiment is basically the same as the previous embodiment, except that the bottom end of the rotating shaft 632 is provided with a rodent-proof hole mechanism 14. The rodent-proof hole mechanism 14 includes a connecting frame 141 fixedly connected to the bottom end of the rotating shaft 632, and an arc-shaped material-pulling plate 142 fixedly connected to the other end of the connecting frame 141.

[0060] While the automatic feeding device 6 is feeding the grain in the storage bin 8 into the vibrating screen body 2, the rotating shaft 632 in the automatic feeding device 6 rotates, causing the connecting frame 141 to rotate synchronously. This, in turn, causes the arc-shaped material guide plate 142 to move the grain near the side wall of the storage bin 8. The arc-shaped material guide plate 142 moves and guides the grain, causing it to move closer to the center of the storage bin 8. This avoids the phenomenon of "rat holes" or "inverted cone-shaped voids" in the grain in the storage bin 8 during the conveying process. This is beneficial for the automatic feeding device 6 to pick up and convey the grain in the storage bin 8 at the same height. Avoiding the phenomenon of "rat holes" or "inverted cone-shaped voids" would make it difficult to convey the grain near the side wall of the storage bin 8 into the vibrating screen body.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vibrating screen with an automatic feeding device, comprising a base (1) and a vibrating screen body (2) fixedly mounted on the top of the base (1), characterized in that: A stand (3) is fixedly installed on the top of the base (1). A height adjustment mechanism (4) is provided on the stand (3). A mounting frame (5) is provided on the height adjustment mechanism (4). An automatic feeding device (6) is fixedly installed on the mounting frame (5). The height adjustment mechanism (4) is used to adjust the height of the mounting frame (5) so as to adjust the height of the automatic feeding device (6) for automatic material picking. The base (1) has a positioning groove (7) on its top, and a storage bin (8) is movably placed inside the positioning groove (7); the automatic feeding device (6) includes a feeding cylinder (61) with an opening at the bottom, the feeding cylinder (61) is fixedly installed on the mounting frame (5), and the opening at the bottom of the feeding cylinder (61) is a material inlet (62), the feeding cylinder (61) is provided with a feeding mechanism (63) inside, and a feeding pipe (64) is fixedly connected to one side of the feeding cylinder (61) near the top. The material conveying mechanism (63) includes a drive motor (631) fixedly installed at the top of the material conveying cylinder (61). The output end of the drive motor (631) is fixedly connected to a rotating shaft (632). The other end of the rotating shaft (632) rotates through the material conveying cylinder (61) and extends into the interior of the material conveying cylinder (61). A spiral conveying blade (633) is fixedly sleeved on one end of the rotating shaft (632) extending into the interior of the material conveying cylinder (61). A control box (9) is installed on the front of the support frame (3). A control panel (10) is installed on the front of the control box (9). A PLC controller (11) is installed inside the control box (9). A pressure sensor (12) is installed on the outside of the feed cylinder (61) near the bottom. A fixing block (15) is fixedly connected to one side of the feed cylinder (61). A vertical rod (16) is movably passed through the fixing block (15). A mounting base (17) and a limiting block (18) are fixedly connected to the bottom and top of the vertical rod (16), respectively. A pressure sensor (19) is fixedly connected to the bottom of the mounting base (17). A flexible spring (20) is fixedly connected between the mounting base (17) and the fixing block (15). The pressure sensor (19) is located between the pressure sensor (12) and the bottom of the rotating shaft (632). The bottom end of the rotating shaft (632) is provided with a rodent-proof hole mechanism (14), which includes a connecting frame (141) fixedly connected to the bottom end of the rotating shaft (632), and an arc-shaped material-pulling plate (142) fixedly connected to the other end of the connecting frame (141).

2. A vibrating screen with an automatic feeding device according to claim 1, characterized in that: The feeding pipe (64) is inclined, and the end of the feeding pipe (64) near the conveying cylinder (61) is higher than the other end.

3. A vibrating screen with an automatic feeding device according to claim 2, characterized in that: The end of the feeding pipe (64) away from the conveying cylinder (61) is connected to a telescopic pipe (66) via a flange (65). The other end of the telescopic pipe (66) is fixedly fitted with a disc (67) and a fixing frame (68). Several multi-stage telescopic rods (69) are fixedly connected between the disc (67) and the flange (65). The fixing frame (68) is fixedly connected to the upright frame (3) and is used to limit and fix the bottom end of the telescopic pipe (66).

4. A vibrating screen with an automatic feeding device according to claim 3, characterized in that: A support frame (610) is fixedly connected to the inner wall of the feed cylinder (61) near the bottom end, and the rotating shaft (632) is rotatably installed on the support frame (610).

5. A vibrating screen with an automatic feeding device according to claim 4, characterized in that: The height adjustment mechanism (4) includes a drive motor (41) and two guide rods (42) fixedly installed. The output end of the drive motor (41) is fixedly connected to a threaded rod (43). The outer surface of the threaded rod (43) is threadedly connected to a threaded block (44). The outer surface of the threaded block (44) is fixedly fitted with a guide block (45). The guide block (45) is movably fitted on the outer surface of the two guide rods (42). The mounting bracket (5) is fixedly connected to the guide block (45) by bolts. The threaded rod (43) is located between the two guide rods (42).

6. A vibrating screen with an automatic feeding device according to claim 5, characterized in that: The support frame (3) is provided with an anti-rotation mechanism (13), which includes an electric telescopic rod (131) and an anti-rotation gear (132). The telescopic end of the electric telescopic rod (131) is fixedly connected with an anti-rotation locking tooth (133). The electric telescopic rod (131) is fixedly installed on the front of the support frame (3), and the anti-rotation locking tooth (133) is movably inserted into the corresponding tooth groove on the anti-rotation gear (132).

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