Multi-layer air vibrating screen

Abstract

This invention relates to a multi-layer pneumatic vibrating screen, comprising a frame with several layers of fixed frames. Each fixed frame contains a vibrating screen frame, each vibrating screen frame is equipped with a screen, and a vibrating beam is located below the screen in each vibrating screen frame. A pneumatic vibrator is mounted at the bottom of the vibrating beam. The bottom of each vibrating screen frame has a receiving trough for undersize material, which is equipped with a discharge pipe. The bottom of the fixed frames has a collecting hopper with a collecting groove on its bottom surface. A partition is located on the top surface of the collecting groove to separate the material in the collecting hopper from the material in the collecting groove. A feed pipe is located on the partition corresponding to each discharge pipe, and the discharge pipe is inserted into the corresponding feed pipe. The bottom of the collecting hopper has an outlet for oversize material, and the bottom of the collecting groove has an outlet for undersize material. This invention uses a pneumatic vibrator, avoiding electric shock accidents caused by leakage. It also includes a quick screen replacement device, improving screen replacement efficiency.

Description

Technical Field

[0001] This invention relates to the field of vibrating screens, specifically multi-layer pneumatic vibrating screens. Background Technology

[0002] Screening machines are widely used in industrial production for screening or sieving mineral materials. Existing screening machines generally consist of a screen frame with a screen mesh mounted on it. However, in practical use, the following technical problems have been identified: 1. The vibrator is typically a vibrating motor. High-load vibrating motors generally use 380V, posing a risk of electric shock if used for extended periods. Furthermore, the vibrating motor itself is heavy, increasing the overall mass of the vibrating body and thus energy consumption. 2. The screen mesh must be tightened and maintained during installation. After a period of use, the screen mesh needs replacement due to wear. Therefore, a corresponding tightening device is generally used to tighten the screen mesh. Since some screen meshes operate under harsh conditions and require frequent replacement, easy installation and disassembly are essential. Existing screen mesh tightening devices generally use a structure that pulls the mesh at both ends and includes a locking device to keep the mesh taut. This structure is complex and inconvenient to operate during installation and disassembly, sometimes requiring two people to operate, thus reducing work efficiency. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the above-mentioned vibrating screen machines and to provide a multi-layer pneumatic vibrating screen machine that uses a pneumatic vibrator to avoid electric leakage accidents, reduce the total mass of the vibrating body, and design a quick tightening device for the screen to facilitate the replacement of the screen.

[0004] The specific solution of the present invention is as follows: a multi-layer pneumatic vibrating screen machine, including a frame, several layers of fixed frames on the frame, a vibrating screen frame in each layer of fixed frames, an elastic support between the vibrating screen frame and the fixed frame, each vibrating screen frame is equipped with a screen, each layer of fixed frames is equipped with a feeder, one end of the feeder is provided with an inlet and the other end is provided with an outlet, the outlet is aligned with the corresponding screen, each vibrating screen frame is provided with a vibrating beam below the screen, the bottom of the vibrating beam is equipped with a pneumatic vibrator, the bottom of the vibrating screen frame is provided with an undersize receiving trough, the undersize receiving trough is provided with a discharge pipe, the bottom of the fixed frame is provided with a collecting hopper, the bottom surface of the collecting hopper is provided with a collecting trough, the top surface of the collecting trough is provided with a partition plate, the partition plate is used to separate the material in the collecting hopper from the material in the collecting trough, the partition plate is provided with an inlet pipe corresponding to each discharge pipe, the discharge pipe is inserted into the corresponding inlet pipe, the bottom of the collecting hopper is provided with an oversize outlet, and the bottom of the collecting trough is provided with an undersize outlet.

[0005] Furthermore, each vibrating screen frame is equipped with a screen quick tightening device. The screen quick tightening device includes two fixed supports on both sides of the middle of the vibrating screen frame. Each of the two fixed supports has a track perpendicular to the screen on one side. Each track is equipped with a sliding support. The bottom ends of the two sliding supports are connected to a screen pressing beam. A rotating shaft is installed between the two fixed supports above the track. The two ends of the rotating shaft are rotatably connected to the fixed supports. A swing arm is fixedly installed at each end of the rotating shaft corresponding to the sliding support. A crank arm is installed between the swing arm and the sliding support. One end of the crank arm is rotatably connected to the sliding support, and the other end is rotatably connected to the swing arm. The crank arm is provided with a limiting groove with a width greater than that of the swing arm. When the rotating shaft is rotated to press the screen pressing beam, the swing arm and the crank arm self-lock through the limiting groove under the rebound force of the screen.

[0006] Furthermore, the crank arm is a C-shaped crank arm, the limiting groove is provided at the upper end of the C-shaped crank arm, and the lower end of the C-shaped crank arm is provided with a clearance groove that cooperates with the sliding bracket.

[0007] Furthermore, the bottom of the pressure beam is provided with an arc surface.

[0008] Furthermore, the swing arm is provided with a sleeve that mates with the rotating shaft, and the sleeve and the rotating shaft are connected by a key.

[0009] Furthermore, the swing arm is provided with a sleeve that mates with the rotating shaft, and the sleeve is connected to the rotating shaft by bolts.

[0010] Furthermore, each layer of the fixed frame contains two vibrating screen frames arranged side by side, with a central beam in the middle of the fixed frame and an elastic support between the vibrating screen frames and the central beam; the two vibrating screen frames in each layer have hexagonal heads on the outward-facing side of their rotating shafts.

[0011] Furthermore, the feeder includes a transition box, the length of which covers the width of two vibrating screen frames. The transition box is equipped with a primary overflow plate, which divides the transition box into two cavities. The upper ends of the two cavities are connected. An overflow trough is provided on the side of the transition box facing the screen. The overflow trough has an outlet corresponding to each of the two vibrating screen frames. The inlet of the overflow trough is located at the upper end of the transition box. The side plate connecting the transition box and the overflow trough is a secondary overflow plate.

[0012] Furthermore, the vibrating beam is provided with side guard plates on both sides, and the pneumatic vibrator is installed between the two side guard plates.

[0013] Furthermore, each vibrating screen frame has a fixed hook plate at one end and a movable hook plate at the other end. The movable hook plate has a sleeve with one end open, and a spring is installed between the inner surface of the sleeve and the vibrating screen frame. The bottom end of the movable hook plate has a pin, and the vibrating screen frame has a corresponding insertion hole. The diameter of the insertion hole is larger than the diameter of the pin so that the pin can tilt inside the insertion hole. The top end of the movable hook plate has an outwardly protruding top plate.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The use of a pneumatic vibrator avoids electric shock accidents caused by leakage; 2. The pneumatic vibrator is lighter, reducing the total weight of the vibrator and reducing energy consumption; 3. The vibration frequency of the pneumatic vibrator has a wider adjustable range than that of a vibrating motor, which can adapt to more different working conditions; 4. The screen replacement operation is more convenient. The screen is tightened by pressing it from the middle. At the same time, the pressing mechanism is self-locked by the rebound force of the screen, so there is no need to set an additional locking device, which simplifies the structure of the screening machine and makes the operation more convenient. A single person can install and remove a screen. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention;

[0016] Figure 2 yes Figure 1 Top view;

[0017] Figure 3 yes Figure 2 AA view;

[0018] Figure 4 This is a schematic diagram of the installation position of the pneumatic vibrator in the single-layer vibrating screen frame of the present invention;

[0019] Figure 5 This is a three-dimensional schematic diagram of the single-layer vibrating screen frame of the present invention with the screen mesh not tightened;

[0020] Figure 6 yes Figure 5 The main view;

[0021] Figure 7 This is a three-dimensional schematic diagram of the single-layer vibrating screen frame of the present invention in the tightened state of the screen mesh;

[0022] Figure 8 yes Figure 7 The main view;

[0023] Figure 9 yes Figure 6 A magnified view at point V;

[0024] Figure 10 yes Figure 8 A magnified view at point M;

[0025] Figure 11 yes Figure 8 A magnified view at point X;

[0026] Figure 12 This is a three-dimensional schematic diagram of the crank arm of the present invention;

[0027] Figure 13 This is a three-dimensional schematic diagram of the tightening device of the present invention;

[0028] In the diagram: 1. Frame; 2. Fixed frame; 3. Feeder; 31. Overflow trough; 32. Secondary overflow plate; 33. Primary overflow plate; 34. Transition box; 4. Intermediate beam; 5. Vibrating screen frame; 6. Screen mesh quick tightening device; 61. Fixed support; 62. Crank arm; 621. Limiting groove; 622. Clearance groove; 63. Swing arm; 64. Screen pressing beam; 65. Rotating shaft; 66. Track; 67. Sliding support; 68. Movable hook plate; 69. Sleeve; 610. Spring; 7. Undersize material receiving trough; 8. Collection hopper; 9. Feed pipe; 10. Collection trough; 11. Undersize material outlet; 12. Oversize material outlet; 13. Pneumatic vibrator; 14. Vibrating beam; 15. Screen mesh. Detailed Implementation

[0029] See Figure 1-4 This embodiment is a multi-layer pneumatic vibrating screen, including a frame 1. The frame 1 has several layers of fixed frames 2, each arranged parallel to the others, with an inclination angle of 5°-30° to the horizontal plane. The frame 1 and the fixed frames 2 are rotatably connected, allowing the inclination angle of the fixed frames 2 to be adjusted according to actual working conditions. The upper end of the inclination angle is the feed end, and the lower end is the discharge end. Each fixed frame 2 contains a vibrating screen frame 5, with an elastic support between the vibrating screen frame 5 and the fixed frame 2. Each vibrating screen frame 5 contains a screen 15. Each fixed frame 2 has a feeder 3, with a feed inlet at one end and a discharge outlet at the other, aligned with the feed inlet of the corresponding screen 15. Each vibrating screen frame 5 has a vibrating... A vibrating beam 14 is equipped with a pneumatic vibrator 13 at its bottom. The vibrating beam 14 is arranged along the length of the screen 15. A connecting crossbeam is provided at each end of the vibrating beam 14. The connecting crossbeams are arranged along the width of the screen 15. The two ends of the connecting crossbeams are fixedly connected to the vibrating screen frame 5. The bottom of the vibrating screen frame 5 is provided with a screen material receiving trough 7. The screen material receiving trough 7 is provided with a discharge pipe. The bottom of the fixed frame 2 is provided with a collecting hopper 8. The bottom surface of the collecting hopper 8 is provided with a collecting trough 10. The top surface of the collecting trough 10 is provided with a partition plate. The partition plate is used to separate the material in the collecting hopper 8 from the material in the collecting trough 10. A feeding pipe 9 is provided on the partition plate corresponding to each discharge pipe. The discharge pipe is inserted into the corresponding feeding pipe 9. The bottom of the collecting hopper 8 is provided with a screen material outlet 12. The bottom of the collecting trough 10 is provided with a screen material outlet 11.

[0030] See Figure 5 , Figure 6 , Figure 13 In this embodiment, each vibrating screen frame 5 is equipped with a screen quick-tightening device 6 in the middle. The screen quick-tightening device 6 includes two fixed supports 61 located on both sides of the middle of the vibrating screen frame 5. Each of the two fixed supports 61 has a track 66 perpendicular to the screen 15 on its opposite side. Each track 66 is equipped with a sliding support 67. The bottom ends of the two sliding supports 67 are connected to a screen pressing beam 64. A rotating shaft 65 is installed between the two fixed supports 61 above the track 66. The shaft 65 is rotatably connected to the fixed bracket 61. At each end of the shaft 65, a swing arm 63 is fixedly mounted at the sliding bracket 67. A crank arm 62 is installed between the swing arm 63 and the sliding bracket 67. One end of the crank arm 62 is rotatably connected to the sliding bracket 67, and the other end is rotatably connected to the swing arm 63. The crank arm 62 is provided with a limiting groove 621 with a width greater than that of the swing arm 63. When the shaft 65 is rotated to press the screen 15 with the screen beam 64, the swing arm 63 and the crank arm 62 self-lock through the limiting groove 621 under the action of the rebound force of the screen 15.

[0031] Furthermore, each vibrating screen frame 5 is provided with a fixed hook plate at one end and a movable hook plate 68 at the other end, see [reference]. Figure 11 The movable hook plate 68 is provided with a sleeve 69 with one end open. A spring 610 is installed between the inner surface of the sleeve 69 and the vibrating screen frame 5. The bottom end of the movable hook plate 68 is provided with a pin. The vibrating screen frame 5 is provided with a hole corresponding to the pin. The diameter of the hole is larger than the diameter of the pin so that the pin can tilt in the hole. This allows the movable plate 68 to push the screen 15 outward under the elastic force of the spring 610. The top end of the movable hook plate 68 is provided with an outwardly extending top plate, which is used to hang the screen 15 and pull it outward.

[0032] See Figure 7 , Figure 8 , Figure 10 When the rotating shaft 65 presses the screen 15 with the pressing beam 64, the swing arm 63 and the crank arm 62 self-lock through the limiting groove 621 under the rebound force of the screen 15. The self-locking principle is as follows: the screen 15 applies an upward rebound force to the pressing beam 64 and the sliding bracket 67. The sliding bracket 67 drives the swing arm 63 through the crank arm 62, causing the swing arm 63 to have a tendency to rotate counterclockwise. However, the swing arm 63 itself is blocked by the limiting groove 621 of the crank arm 62, so it cannot rotate counterclockwise, thus achieving self-locking.

[0033] See Figure 12 Furthermore, the crank arm 62 is a C-shaped crank arm, the limiting groove 621 is provided at the upper end of the C-shaped crank arm 62, and the lower end of the C-shaped crank arm 62 is provided with a clearance groove 622 that cooperates with the sliding bracket 67.

[0034] Furthermore, the bottom of the pressing beam 64 is provided with an arc surface, and the screen 15 fits into the arc surface when pressing the screen 15.

[0035] Furthermore, the swing arm 63 is provided with a sleeve that cooperates with the rotating shaft 65, and the sleeve and the rotating shaft 65 are connected by a key or bolts.

[0036] See Figure 5 , Figure 9 When disassembling the screen 15, rotate the shaft 65 in the opposite direction to make the swing arm 63 rotate clockwise. The sliding bracket 67 and the screen pressing beam 64 move downward first. When the swing arm 63 rotates past the 6 o'clock position, the sliding bracket 67 and the screen pressing beam 64 begin to move upward. Finally, the inner arc of the crank arm 62 fits against the outer wall of the sleeve of the swing arm 63. The sliding bracket 67 and the screen pressing beam 64 are raised to the highest point and disengage from the screen 15, thus the screen 15 is released. The screen 15 can be disassembled by removing it from the hook plates at both ends of the vibrating screen frame 5.

[0037] Furthermore, in order to increase the screening capacity of the screening machine, two vibrating screen frames 5 are installed side by side in each layer of the fixed frame 2. A middle beam 4 is provided in the middle of the fixed frame 2, and an elastic support is installed between the vibrating screen frame 5 and the middle beam 4. The rotating shaft 65 on the two vibrating screen frames 5 of each layer has a hexagonal head on the outward side. When changing the screen, two workers operate from both sides of the screening machine to change the screen 15 on the side closer to the operator. When changing, the hexagonal head is inserted through the socket wrench to drive the rotating shaft 65 to rotate. The end of the rotating shaft facing the middle beam 4 is connected to the vibrating screen frame 5 and is the passive end.

[0038] Furthermore, the feeder 3 includes a transition box 34, the length of which covers the width of two vibrating screen frames 5. The transition box 34 is provided with a primary overflow plate 33, which divides the transition box 34 into two cavities. The upper ends of the two cavities are connected. The side of the transition box 34 facing the screen 15 is provided with an overflow trough 31. The overflow trough 31 has an outlet corresponding to each of the two vibrating screen frames 5 in the same layer. The inlet of the overflow trough 31 is located at the upper end of the transition box 34. The side plate connecting the transition box 34 and the overflow trough 31 is a secondary overflow plate 32.

[0039] Furthermore, the vibrating beam 14 is provided with side guard plates on both sides, and the pneumatic vibrator 13 is installed between the two side guard plates. The cross-sectional shape of the vibrating beam 14 is approximately an inverted U-shape. The top surface and both sides of the U-shape have a protective function for the pneumatic vibrator 13, which greatly reduces the damage of the slurry to the pneumatic vibrator 13.

[0040] The working principle of this embodiment is as follows: The slurry overflows evenly onto the screen 15 through the feeders 3 of each layer. Due to the inclined arrangement of the screen 15, the slurry flows naturally downward along the screen 15. During the flow, the screen 15 vibrates continuously under the drive of the pneumatic vibrator 13. Particles larger than the pores of the screen 15 are the oversize material, and particles smaller than the pores of the screen 15 are the undersize material. The oversize material falls directly from the bottom of the screen into the collection hopper 8, and then flows downward along the collection hopper 8 and finally flows out from the oversize material outlet 12. The undersize material enters the undersize material receiving trough 7 of each layer, flows downward along the receiving trough to the discharge pipe, and then flows into the collection trough 10 through the corresponding feed pipe 9, and finally flows out from the undersize material outlet 11.

Claims

1. A multi-deck pneumatic shaker machine comprising a frame, characterized by: The rack is provided with a plurality of layers of fixed frames, each layer of fixed frame is provided with a vibrating screen frame, and an elastic support is arranged between the vibrating screen frame and the fixed frame; each vibrating screen frame is provided with a screen; each layer of fixed frame is provided with a feeder, one end of the feeder is provided with an inlet, and the other end is provided with an outlet; the outlet is aligned with the corresponding screen; each vibrating screen frame is provided with a vibrating beam below the screen; the bottom of the vibrating beam is provided with a pneumatic vibrator; the bottom of the vibrating screen frame is provided with a screen underflow receiving groove; the screen underflow receiving groove is provided with a discharge pipe; the bottom of the fixed frame is provided with a collecting hopper; the bottom surface of the collecting hopper is provided with a collecting groove; the top surface of the collecting groove is provided with a partition plate; the partition plate is used for separating the materials in the collecting hopper and the materials in the collecting groove; the partition plate is provided with an inlet pipe corresponding to each discharge pipe; the discharge pipe is inserted into the corresponding inlet pipe; the bottom of the collecting hopper is provided with a screen overflow outlet; the bottom of the collecting groove is provided with a screen underflow outlet. Each vibrating screen frame is provided with a screen quick tightening device; the screen quick tightening device comprises two fixed supports arranged on both sides of the middle of the vibrating screen frame; the opposite side of each fixed support is provided with a track perpendicular to the screen; each track is provided with a sliding support; the bottom ends of the two sliding supports are connected with a screen pressing beam; a rotating shaft is arranged between the two fixed supports above the track; the two ends of the rotating shaft are rotatably connected with the fixed supports; the two ends of the rotating shaft are respectively provided with an arm swing; the arm swing and the sliding support are provided with a toggle; one end of the toggle is rotatably connected with the sliding support, and the other end is rotatably connected with the arm swing; the toggle is provided with a limiting groove with a width greater than the arm swing; when the rotating shaft is rotated to press the screen with the screen pressing beam, the arm swing and the toggle are self-locked through the limiting groove under the rebounding force of the screen.

2. The multi-deck air shaker machine of claim 1, wherein: The toggle is a C-shaped toggle, and the limiting groove is arranged at the upper end of the C-shaped toggle; the lower end of the C-shaped toggle is provided with a give-way groove matched with the sliding support.

3. The multi-deck air shaker machine of claim 1, wherein: Each layer of fixed frame is provided with two vibrating screen frames arranged side by side; the middle of the fixed frame is provided with a middle beam; the elastic support is arranged between the vibrating screen frame and the middle beam; the outward side of the rotating shaft of each layer of two vibrating screen frames is provided with a hexagonal head.

4. The multi-deck air shaker according to claim 3, wherein: The feeder comprises a transition box; the length of the transition box covers the width of the two vibrating screen frames; the transition box is provided with a primary overflow plate; the primary overflow plate divides the transition box into two cavities; the two cavities are communicated at the upper end; the transition box is provided with an overflow groove on the side facing the screen; the overflow groove is provided with an outlet corresponding to each vibrating screen frame; the inlet of the overflow groove is located at the upper end of the transition box; the side plate connected with the overflow groove of the transition box is a secondary overflow plate.

5. The multi-deck air shaker according to claim 1, wherein: The two sides of the vibrating beam are provided with side guards; the pneumatic vibrator is mounted between the two side guards.

6. The multi-deck air shaker according to claim 1, wherein: One end of each vibrating screen frame is provided with a fixed hook plate, and the other end is provided with a movable hook plate; the movable hook plate is provided with a sleeve with an open end; the inner surface of the sleeve and the vibrating screen frame are provided with a spring; the bottom end of the movable hook plate is provided with a bolt; the vibrating screen frame is provided with a hole corresponding to the bolt; the diameter of the hole is greater than the diameter of the bolt, so that the bolt can be inclined in the hole; the top end of the movable hook plate is provided with a top plate extending outward.

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