Specific gravity grading combined screening device

Abstract

The utility model relates to the technical field of screening equipment, and discloses a specific gravity grading combined screening device which comprises a main support, a screening device, a screening device body, a screening device body, a screening device body, a screening device body, a screening device body and a screening device body and is characterized in that the main support comprises an upper supporting frame, a lower supporting frame and a plurality of supporting legs, the supporting legs are fixed between the upper supporting frame and the lower supporting frame; the feeding mechanism comprises a feeding box and a discharging control assembly, the feeding box is fixedly arranged above the upper supporting frame, and the discharging control assembly is arranged in the feeding box; the dust removal mechanism comprises a fan and a dust removal groove; the first screening mechanism comprises a first screening plate and a material receiving disc, the first screening plate is arranged on the upper supporting frame in a sliding mode and driven by an electric push rod, and the material receiving disc is arranged below the first screening plate; the second screening mechanism comprises a second screening plate, the second screening plate is arranged below the material receiving disc on the main support and driven by a vibrator to vibrate, a plurality of springs are arranged between the lower wall and the lower supporting frame, and a plurality of protruding strips are arranged on the second screening plate. The screening device has the advantages that dirt such as soil on the surfaces of materials can be screened in a multi-time specific gravity grading mode, and therefore the screening effect is better.

Description

Technical Field

[0001] This utility model relates to the field of screening equipment technology, specifically to a gravity grading combined screening device. Background Technology

[0002] A gravity grading and screening device is a piece of equipment used to classify and screen materials with different specific gravities. Its working principle mainly utilizes the different settling velocities or buoyancy of materials in a specific medium due to differences in specific gravity, combined with mechanical structures such as screens, to separate materials according to specific gravity and particle size. This device typically consists of a feeding system, a grading mechanism, a screening mechanism, a drive unit, and a control system.

[0003] Gravity grading and screening devices are widely used in the field of grain cleaning. Their main function is to efficiently and accurately separate grains from larger impurities such as straw. During operation, they utilize the difference in specific gravity between grains and straw, employing a cleverly designed airflow or water flow system and a precisely calibrated screen structure to achieve effective separation. However, this device is not without its limitations. In practice, the dirt adhering to the surface of the grain, due to its light weight and strong adhesion, often poses a significant challenge. These fine dirt particles are difficult to remove by simply using the difference in specific gravity. Utility Model Content

[0004] To solve the above-mentioned problems, this utility model proposes a gravity grading combined screening device that can repeatedly classify and screen dirt and other contaminants on the surface of materials by specific gravity, thereby achieving better screening results.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is: a gravity grading combined screening device, comprising:

[0006] The main support frame includes an upper support frame, a lower support frame, and several legs. The upper support frame is inclined, and the legs are fixedly installed at the four corners between the upper and lower support frames.

[0007] The feeding mechanism includes a feeding box and a discharge control component. The feeding box is fixed above the raised end of the upper support frame by a support plate. It has a feeding port on its upper wall and an unobstructed discharge opening below. The discharge control component is located inside the feeding box.

[0008] The dust removal mechanism includes a fan and a dust removal trough. The dust removal trough is located above the upper support frame and is inclined in the same direction as the upper support frame. Its raised end is close to the discharge opening of the feed box. The fan is fixedly located on the support plate below the feed box and faces the dust removal trough.

[0009] The first screening mechanism includes a screen plate and a receiving tray. The screen plate is slidably mounted on the upper support frame and is inclined in the same direction as the upper support frame. It is driven by an electric push rod fixed on the upper support frame to slide along the inclined direction of the upper support frame. The receiving tray is located below the screen plate and is slidably mounted on the main support. A guide plate is provided on the main support between the screen plate and the receiving tray and near the lower end of the screen plate.

[0010] The second screening mechanism includes a second screen plate, which is located below the material receiving tray on the main support and is driven to vibrate by a vibrator fixed on the main support. Several springs are provided between the lower wall and the lower support frame, and are inclined upward near the end of the guide plate. Several protrusions are provided on the second screen plate.

[0011] Furthermore, the feeding control component includes a rotating shaft, which is rotatably connected inside the feeding box and driven to rotate by a reduction motor fixed on the side wall of the feeding box. Several control baffles are provided on the side wall of the rotating shaft.

[0012] Furthermore, the upper support frame is provided with a guide groove for the sieve plate to slide.

[0013] Furthermore, a baffle plate is integrally formed on the bottom surface of the dust removal tank away from the fan end, and the lower end of the baffle plate is located at a low end of the screen plate and is fixedly connected to the upper support frame.

[0014] Furthermore, a guide seat is fixed between the legs for the material receiving tray to slide, and the material receiving tray can be slid out from one end of the guide seat.

[0015] Furthermore, both the raised end of the sieve plate one and the sieve plate two are equipped with barriers at their front and rear edges.

[0016] Furthermore, the convex strip is a bent shape that protrudes from the middle towards the upper end of the sieve plate.

[0017] Compared with the prior art, the advantages of this utility model are: the dust removal mechanism can initially clean the dirt and other contaminants from the surface of the grain. The fan blows air into the dust removal trough, and when the material falls out of the feed box, some of the lighter dust and other impurities are blown away by the wind, achieving initial cleaning.

[0018] The first screening mechanism further separates impurities. Screen plate one slides under the drive of an electric push rod, causing the material to move and be screened on screen plate one. Small particles of impurities fall through the screen holes into the receiving tray, while larger particles remain on the screen plate and finally fall under the action of the guide plate, achieving primary gravity-based screening.

[0019] The second screening mechanism performs finer screening. Screen plate two vibrates under the drive of a vibrator, while springs buffer and enhance the vibration effect. The raised strips on screen plate two better disperse and agitate the material, further separating the material from impurities such as mud, achieving secondary gravity-based screening. Attached Figure Description

[0020] Figure 1 This is a three-dimensional representation of the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional representation of the present invention. Figure 2 ;

[0022] Figure 3 This is the front view of this utility model;

[0023] Figure 4 This is a top view of the present invention.

[0024] As shown in the figure: 1. Upper support frame; 2. Lower support frame; 3. Support leg; 4. Feed box; 5. Support plate; 6. Fan; 7. Dust removal trough; 8. Screen plate one; 9. Receiving tray; 10. Electric push rod; 11. Guide inclined plate; 12. Screen plate two; 13. Vibrator; 14. Spring; 15. Protruding strip; 16. Rotating shaft; 17. Gear motor; 18. Control baffle; 19. Baffle plate; 20. Guide seat; 21. Enclosure. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Combined with appendix Figure 1 Appendix Figure 3 Appendix Figure 4 A gravity grading combined screening device includes: a main support, comprising an upper support frame 1, a lower support frame 2, and several legs 3, wherein the upper support frame 1 is inclined and the legs 3 are fixedly disposed at the four corners between the upper support frame 1 and the lower support frame 2; a feeding mechanism, comprising a feeding box 4 and a feeding control component, wherein the feeding box 4 is fixedly disposed above the raised end of the upper support frame 1 by a support plate 5, and has a feeding port on its upper wall and an unobstructed discharge port below; the feeding control component is disposed inside the feeding box 4, and the feeding control component includes a rotating shaft 16, which is rotatably connected inside the feeding box 4 and driven to rotate by a reduction motor 17 fixed on the side wall of the feeding box 4; the side wall of the rotating shaft 16 is provided with several control baffles 18, and the rotation of the rotating shaft 16 by the reduction motor 17 drives the control baffles 18 to rotate, thereby flexibly controlling the feeding speed and feeding amount of the feeding box 4 to achieve precise feeding.

[0027] Combined with appendix Figure 1 Appendix Figure 2The dust removal mechanism includes a fan 6 and a dust removal trough 7. The dust removal trough 7 is located above the upper support frame 1 and is inclined in the same direction as the upper support frame 1. Its raised end is close to the discharge opening of the feed box 4. The fan 6 is fixedly located on the support plate 5 below the feed box 4 and is oriented towards the dust removal trough 7.

[0028] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 The first screening mechanism includes a screen plate 8 and a receiving tray 9. The screen plate 8 is slidably mounted on the upper support frame 1 and is inclined in the same direction as the upper support frame 1. It is driven by an electric push rod 10 fixed on the upper support frame 1 to slide along the inclined direction of the upper support frame 1. The upper support frame 1 is provided with a guide groove for the sliding of the screen plate 8, which can provide a stable guiding effect for the sliding of the screen plate 8, ensuring that the screen plate 8 slides smoothly along the inclined direction of the upper support frame 1 under the drive of the electric push rod 10, thereby improving the stability of screening. The bottom surface of the dust removal tank 7, away from the fan 6, is integrally formed with a baffle plate 19. The lower end of the baffle plate 19 is located at the lower end of the screen plate 8 and is fixedly connected to the upper support frame 1, which can effectively prevent materials from sliding directly from the screen plate 8, ensuring sufficient screening.

[0029] Combined with appendix Figure 1 Appendix Figure 2 The receiving tray 9 is located below the screen plate 8 and slidably mounted on the main support. A guide plate 11 is provided on the main support between the screen plate 8 and the receiving tray 9 and near the lower end of the screen plate 8. A guide seat 20 for the receiving tray 9 to slide is fixed between the legs 3. The receiving tray 9 can be slid out from one end of the guide seat 20, which makes it convenient for the receiving tray 9 to receive the material screened by the screen plate 8. When it is necessary to clean or pour out the material, the receiving tray 9 can be easily pushed out, which is simple to operate.

[0030] Combined with appendix Figure 1 Appendix Figure 2 The second screening mechanism includes a second screen plate 12, which is located below the material receiving tray 9 on the main support and is driven to vibrate by a vibrator 13 fixed on the main support. Several springs 14 are provided between the lower wall and the lower support frame 2, with the springs inclined upwards near the guide plate 11. Several protruding strips 15 are provided on the second screen plate 12. These protruding strips 15 are bent and protrude upwards from the center towards the upper end of the second screen plate 12, which allows the material to be better dispersed and turned during the vibration screening process on the second screen plate 12, enhancing the screening effect and improving the screening accuracy.

[0031] Combined with appendix Figure 1 Appendix Figure 2 The raised end of the first screen plate 8 and the front and rear side edges of the second screen plate 12 are equipped with baffles 21, which can effectively prevent the material from overflowing from the edge of the screen plate during the screening process, ensure that the material is screened normally on the screen plate, and improve screening efficiency and quality.

[0032] The specific implementation method of this utility model is as follows: First, connect the device to an external power source and feed material through the feed inlet, or connect the feed inlet to the discharge outlet of the material processing equipment to achieve feeding, and the material falls from the discharge opening. Start the reduction motor 17, drive the rotating shaft 16 to rotate, and then control the control baffle 18 to rotate. Adjust the speed of the reduction motor 17 as needed, thereby flexibly adjusting the feeding speed and feeding amount of the feed box 4.

[0033] At the same time, the blower 6 is turned on, and the blower 6 sends air to the dust removal tank 7. When the material falls from the feed box 4 and passes through the port of the dust removal tank 7, some of the lighter dust and other impurities are blown into the dust removal tank 7 under the action of the wind, completing the initial separation and cleaning.

[0034] Next, the material falls onto screen plate 8, and the electric push rod 10 starts, driving screen plate 8 to slide back and forth along the guide groove of the upper support frame 1. The material moves and is screened on screen plate 8. Small particles and impurities fall through the screen holes into the receiving tray 9, while larger particles remain on screen plate 8. As screen plate 8 moves, a gap is formed between it and the baffle plate 19. The material screened by screen plate 8 falls down along the guide inclined plate 11 onto screen plate 12. The receiving tray 9 receives the material screened by screen plate 8. When it is necessary to clean or pour out the material, the receiving tray 9 can be slid out from one end of the guide seat 20.

[0035] Finally, the material falling onto screen plate 12 is driven by vibrator 13, causing screen plate 12 to vibrate and drive the material to vibrate. Spring 14 acts as a buffer and enhances the vibration effect, and the ridges 15 on screen plate 12 better disperse and agitate the material, further separating the material from impurities such as mud, thus completing the secondary gravity grading screening. Throughout the process, the barriers 21 on screen plate 8 and screen plate 12 effectively prevent material from overflowing from the edges of the screen plates.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; for those skilled in the art, the specific meaning of the above term in this utility model can be understood according to the specific circumstances.

[0037] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A combination specific gravity and size classification apparatus, characterized in that, The utility model provides a kind of high efficiency and energy saving's grain screening device, including: Main support, including upper support frame (1), lower support frame (2) and several legs (3), the upper support frame (1) is obliquely arranged, the leg (3) is fixedly arranged between upper support frame (1) and lower support frame (2) four corners; Feeding mechanism, including feed tank (4) and discharging control component, the feed tank (4) is fixedly arranged on the upper wall of upper support frame (1) elevated end by support plate (5), is equipped with feeding port, and the lower surface is the unobstructed discharging opening, the discharging control component is arranged in feed tank (4); Dust removal mechanism, including fan (6) and dust removal groove (7), the dust removal groove (7) is arranged above upper support frame (1) and is arranged in the same direction with upper support frame (1) obliquely, and its elevated end is close to the discharging opening of feed tank (4), the fan (6) is fixedly arranged on support plate (5) below feed tank (4) and is arranged towards dust removal groove (7); First screening mechanism, including sieve plate one (8) and receiving tray (9), the sieve plate one (8) is slidably arranged on upper support frame (1) and is arranged in the same direction with upper support frame (1) obliquely, is driven along the oblique direction of upper support frame (1) by electric push rod (10) fixedly arranged on upper support frame (1), the receiving tray (9) is arranged below sieve plate one (8) and is slidably arranged on main support, the guide plate (11) is arranged on main support between sieve plate one (8) and receiving tray (9) and close to the low end of sieve plate one (8); Second screening mechanism, including sieve plate two (12), the sieve plate two (12) is arranged below receiving tray (9) on main support and is driven to vibrate by vibrator (13) fixedly arranged on main support, and a plurality of springs (14) are arranged between lower wall and lower support frame (2), which is arranged obliquely upwards close to the end of guide plate (11), a plurality of convex strips (15) are arranged on the sieve plate two (12).

2. A combination gravity and sizing screen apparatus as claimed in claim 1 wherein: The discharging control component includes a rotating shaft (16), the rotating shaft (16) is rotatably connected in the feed tank (4), and is driven to rotate by a reduction motor (17) fixedly arranged on the side wall of the feed tank (4), a plurality of control baffles (18) are arranged on the side wall of the rotating shaft (16).

3. A combination gravity and sizing screen apparatus as defined in claim 1 wherein: The upper support frame (1) is provided with a guide groove for the sliding of the sieve plate one (8).

4. A combination gravity and sizing screen apparatus as defined in claim 1 wherein: The bottom surface of the dust removal groove (7) is integrally formed with a material blocking plate (19) away from the fan (6) end, and the lower end of the material blocking plate (19) is located at the low end of the sieve plate one (8) and is fixedly connected with the upper support frame (1).

5. A combination gravity and sizing screen apparatus as defined in claim 1 wherein: The guide seat (20) for the sliding of the receiving tray (9) is fixedly arranged between the legs (3), and the receiving tray (9) can be slid out from one end of the guide seat (20).

6. A combination gravity and sizing screen apparatus as defined in claim 1, wherein: The elevated end and the front and rear side edges of the sieve plate one (8) and the sieve plate two (12) are provided with a fence (21).

7. A combination gravity and sizing screen apparatus as defined in claim 1 wherein: The convex strip (15) is a bending shape with the middle part protruding towards the elevated end of the sieve plate two (12).

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