Feed delivery device

Abstract

This invention discloses a feeding and conveying device, belonging to the field of material conveying. The feeding and conveying device includes: a frame; a hopper fixedly mounted on the frame; a material inlet formed at the bottom of the side wall of the hopper, the hopper having a discharge end with a discharge port; a scraper conveying mechanism disposed below the hopper; and a guiding and counter-current mechanism fixedly connected to the discharge end of the hopper. Before the material reaches the discharge end, the guiding and counter-current mechanism flips the upper layer of material upwards and guides it back to the center of the hopper, while the lower layer of material continues to be conveyed forward between the guiding and counter-current mechanism and the scraper conveying mechanism. The scraper conveying mechanism and the guiding and counter-current mechanism of this invention work together to change the flow pattern of the material within the hopper. The scraper conveying mechanism provides continuous horizontal forward thrust; when the material rushes towards the discharge port, the guiding and counter-current mechanism lifts the upper layer of material upwards and reverses it backwards, preventing material from clumping, blocking, or jamming at the discharge port of the hopper, thus ensuring stable and continuous material conveying.

Description

Technical Field

[0001] This invention relates to the field of material conveying, and in particular to a material feeding and conveying device. Background Technology

[0002] When screw conveyors continuously transport materials with loose, viscous, or easily agglomerated characteristics (such as ultra-long fiber materials, wood flakes, etc.), the materials are prone to periodic accumulation at the discharge end. In particular, flaky materials are more likely to experience extrusion and jamming at the discharge end, affecting subsequent continuous production.

[0003] To address material jamming at the discharge port, existing technologies typically incorporate an active reverse-push anti-jamming mechanism near the port. This involves installing a reverse-push screw, driven by a motor, parallel to the discharge screw at the bottom of the hopper. When material accumulates at the discharge port, the motor drives the reverse-push screw to rotate in the opposite direction, forcibly pushing the material back into the hopper axially through its helical blades, thus alleviating localized blockage. However, this rotating reverse-push screw is a forced axial propulsion mechanism. When dealing with sticky or easily entangled materials, the strong mechanical compression can easily cause the material to gradually compact during the reverse-push process, potentially creating larger, harder agglomerates within the hopper, failing to fundamentally disperse the material.

[0004] Therefore, there is an urgent need to provide a material feeding and conveying device that can effectively solve the problem of material accumulation and jamming at the outlet and ensure smooth and uniform material discharge. Summary of the Invention

[0005] This invention provides a material feeding and conveying device to overcome the problem of material jamming at the discharge port.

[0006] The feeding and conveying device of the present invention includes:

[0007] frame;

[0008] The hopper is fixedly mounted on the frame; a material discharge port is formed at the bottom of the side wall of the hopper, and the hopper has a discharge end with a discharge outlet;

[0009] The scraper conveyor mechanism is located below the hopper and corresponds to the hopper's discharge port; the scraper conveyor mechanism is used to transport materials from the hopper to the discharge end and push them out.

[0010] The guide counterflow mechanism is fixedly connected to the discharge end of the silo. Before the material reaches the discharge end, the guide counterflow mechanism flips the upper part of the material upward and guides it back to the center of the silo. The lower part of the material continues to be conveyed forward between the guide counterflow mechanism and the scraper conveyor mechanism. The maximum height of the lower part of the material is less than the top height of the discharge port.

[0011] According to the aforementioned feeding and conveying device, the bottom of the side wall of the silo is an inwardly inclined plate from top to bottom, with an inclination angle of 40°~60°.

[0012] According to the aforementioned feeding and conveying device, the lateral width of the silo perpendicular to the material conveying direction is 4 to 6 meters;

[0013] At least two parallel scraper conveying mechanisms are provided below the silo, and at least two guide counterflow mechanisms are provided on the inner wall of the silo's discharge end. The scraper conveying mechanism and the guide counterflow mechanism correspond one-to-one.

[0014] Furthermore, a flow divider is provided in the inner cavity of the hopper between two adjacent scraper conveying mechanisms; the cross-section of the flow divider is an inverted "V" shaped structure, consisting of two guide plates, with the top ends of the two guide plates converging and connected, and the bottom ends of the two guide plates tilting towards the scraper conveying mechanism;

[0015] The bottom of the diverter is provided with support columns arranged at intervals along the conveying direction. The support columns are used to stably support the diverter.

[0016] According to the aforementioned feeding and conveying device, the scraper conveying mechanism is equipped with:

[0017] - Base, located below the silo;

[0018] -Sprockets, including two symmetrically arranged sprocket sets, each sprocket set consisting of two sprockets arranged in a front-to-back direction along the conveying direction;

[0019] - Two ring chains are provided, each fitted onto two sets of sprockets; both ends of the ring chain extend laterally to the discharge port of the hopper; the ring chain has an upper conveying section and a lower return section;

[0020] - A drive motor, mounted on the base and connected to one of the sprockets, provides driving force to the ring chain;

[0021] - Multiple scrapers are spaced apart, and their two ends are fixedly connected to two annular chains respectively; the extension direction of the scrapers is perpendicular to the material conveying direction;

[0022] - The pallet is fixedly installed on the base and corresponds to the space between the conveying sections of the two annular chains, located below the corresponding scrapers of the conveying sections of the two annular chains;

[0023] The drive motor rotates the sprocket, which in turn rotates the two ring chains, which in turn move the scraper. The material falls from the hopper onto the pallet, and the scraper corresponding to the conveying section of the ring chain pushes the material forward.

[0024] Furthermore, the drive motor is a variable frequency motor, and its speed is adaptively adjusted according to the material ratio and conveying speed.

[0025] Furthermore, the scraper is fixedly connected to the annular chain via a first connector and fasteners.

[0026] Furthermore, guide rails are provided on the upper and lower parts of the base;

[0027] Rollers are connected to both ends of the scraper via a second connector and fasteners, and the rollers roll on the guide rail.

[0028] According to the aforementioned feeding and conveying device, the guiding counterflow mechanism is a guide plate fixedly installed on the inner wall of the discharge end of the hopper. The guide plate extends from the inner wall of the discharge end of the hopper inward and is inclined downward. The top of the guide plate is connected to the inner wall of the discharge end, and the bottom edge of the guide plate is lower than the top of the discharge port.

[0029] During the process of conveying materials toward the discharge end, some materials are pushed upward along the slope of the guide plate and flipped back into the hopper by utilizing the positive propulsion force of the material flow.

[0030] According to the aforementioned feeding and conveying device, the guiding counterflow mechanism is an arc-shaped guide plate fixedly installed on the inner wall of the material outlet end of the hopper. The lower half of the arc-shaped guide plate extends from the inner wall of the material outlet end into the hopper, and the bottom edge height of the lower half of the arc-shaped guide plate is lower than the top height of the material outlet.

[0031] The upper half of the arc-shaped guide plate bends upward from the inner wall of the discharge end to form a guiding arc surface; the edge of the upper half of the arc-shaped guide plate is connected to the wall of the hopper; the guiding arc surface extends into the hopper and intermittently covers the lower half of the edge of the arc-shaped guide plate.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] In the feeding and conveying device of the present invention, the scraper conveying mechanism and the guide counterflow mechanism work together to change the flow pattern of materials in the hopper. The scraper conveying mechanism provides continuous horizontal forward thrust. When the material rushes towards the discharge port, the guide counterflow mechanism lifts the upper layer of material upward and reverses it inward, avoiding blockage and jamming of materials at the discharge port of the hopper, and ensuring stable and continuous material conveying. Attached Figure Description

[0034] Figure 1 A three-dimensional structural diagram of a material feeding and conveying device;

[0035] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0036] Figure 3 This is a top view of a material feeding and conveying device;

[0037] Figure 4 for Figure 3 Sectional view along the BB direction;

[0038] Figure 5 A side view of a material feeding and conveying device;

[0039] Figure 6 for Figure 5 A cross-sectional view along the CC direction;

[0040] Figure 7 for Figure 6 A magnified view of a section at point D;

[0041] Figure 8 This is a schematic diagram showing the state of materials in the feeding and conveying device.

[0042] Figure 9 A three-dimensional structural diagram of the scraper conveyor mechanism;

[0043] Figure 10 for Figure 9 A magnified view of a section at point E in the middle;

[0044] Figure 11 This is a top view of the scraper conveyor mechanism;

[0045] Figure 12 for Figure 11 Sectional view along the FF direction;

[0046] Figure 13 A structural schematic diagram showing the combined state of the scraper, the ring chain, the roller, the first connector, and the second connector;

[0047] Figure 14 A three-dimensional structural diagram of another material feeding and conveying device;

[0048] Figure 15 A side view of another material feeding and conveying device;

[0049] Figure 16 for Figure 15 A cross-sectional view along the GG direction;

[0050] Figure 17 for Figure 16 A magnified view of a section at point H in the middle;

[0051] Figure 18 This is a schematic diagram showing the state of materials in another type of feeding and conveying device.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Rack;

[0054] 2. Hopper; 21. Feed inlet; 22. Discharge end; 23. Discharge outlet;

[0055] 3. Scraper conveyor mechanism; 31. Base; 32. Sprocket; 33. Annular chain; 331. Conveying section; 332. Return section; 34. Scraper; 35. Pallet; 36. First connecting member; 361. First horizontal section; 362. First vertical section; 37. Guide rail; 38. Second connecting member; 381. Second horizontal section; 382. Second vertical section; 39. Roller;

[0056] 4. Guiding and counter-current mechanism; 41. Material guiding arc surface;

[0057] 5. Diverter components;

[0058] 6. Support columns. Detailed Implementation

[0059] To make the technical problem to be solved, the technical solution and advantages of the present invention clearer, the following description will be provided in conjunction with the accompanying drawings. Figures 1 to 18 The technical solution of the present invention will be clearly and completely described in conjunction with specific embodiments.

[0060] Example 1:

[0061] like Figures 1 to 7 As shown, the material feeding and conveying device of this embodiment includes a frame 1, a hopper 2, a scraper conveying mechanism 3, and a guide counterflow mechanism 4.

[0062] The frame 1 is used to support and fix the hopper 2 on it. The frame 1 is a frame structure formed by transverse supporting steel beams and longitudinal steel columns, which is used to stably support the hopper 2.

[0063] The hopper 2 is fixedly mounted on the frame 1. A discharge port 21 is formed at the bottom of the side wall of the hopper 2. The discharge port 21 is an opening at the bottom of the hopper 2 along the material conveying direction. Material falls from the top of the hopper 2 through the discharge port 21 onto the scraper conveyor mechanism 3 for further forward conveying. The hopper 2 is a hopper structure with closed sides and open top and bottom. The top of the hopper 2 is open, and mechanical equipment feeds material into the internal cavity of the hopper 2 through the top. The bottom of the hopper 2 is open, forming the discharge port 21. The hopper 2 has a discharge end 22 with a discharge port 23. The discharge port 23 is formed at the bottom end of the discharge end 22.

[0064] The scraper conveyor 3 is located below the hopper 2 and is positioned corresponding to the discharge port 21 of the hopper 2. The scraper conveyor 3 is used to convey materials from the hopper 2 to the discharge end 22 and push them out.

[0065] This invention provides a specific scraper conveying mechanism 3, such as... Figures 9 to 13As shown, the scraper conveyor mechanism 3 includes a base 31, sprockets 32, annular chains 33, a drive motor (not shown), scrapers 34, and a support plate 35. The base 31 is located below the hopper 2 and supports the other structures of the scraper conveyor mechanism 3 fixed thereon. The sprockets 32 consist of two symmetrically arranged sets, each set comprising two sprockets 32 arranged front-to-back along the conveying direction. All sprockets 32 rotate synchronously to transmit the rotational force of the drive motor to the annular chains 33. Two opposing sprockets 32 perpendicular to the material conveying direction can be connected by a linkage to ensure the stability of the conveying process. Two annular chains 33 are provided, each fitted onto one of the two sets of sprockets 32. Both ends of the annular chains 33 extend laterally out of the discharge ports 21 of the hopper 2. The annular chains 33 have an upper conveying section 331 and a lower return section 332. The conveying section 331 and the scrapers 34 work together to convey material forward. A drive motor is mounted on the base 31 and is connected to one of the sprockets 32 to drive the annular chain 33. Multiple scrapers 34 are spaced apart, each end of which is fixedly connected to two annular chains 33 respectively. The extension direction of the scrapers 34 is perpendicular to the material conveying direction. A support plate 35 is fixedly mounted on the base 31 and corresponds to the space between the conveying sections 331 of the two annular chains 33, located below the corresponding scraper 34 of the conveying section 331 of the two annular chains 33. Specifically, the support plate 35 is fixedly mounted on the base 31 via a connector. The drive motor rotates the sprocket 32, which in turn rotates the two annular chains 33, thereby moving the scrapers 34. Both ends of the annular chains 33 extend laterally into the discharge ports 21 of the hopper 2, ensuring that material from the inner cavity of the hopper 2 falls onto the scraper conveying mechanism 3 through the discharge ports 21. Material falls from the discharge port 21 of the hopper 2 onto the pallet 35 from top to bottom, and the scraper 34 corresponding to the conveying section 331 of the annular chain 33 propels the material forward. The two ends of the scraper 34 are fixedly connected to the annular chain 33, which has the characteristics of high conveying capacity.

[0066] Furthermore, the drive motor is a variable frequency motor, and its speed is adaptively adjusted according to the material ratio and conveying speed.

[0067] Furthermore, such as Figure 13 As shown, the scraper 34 is fixedly connected to the annular chain 33 via a first connector 36 and fasteners. The first connector 36 has an L-shaped structure, having a first horizontal portion 361 and a first vertical portion 362 located on one side of the first horizontal portion 361. The first horizontal portion 361 is fixedly connected to the scraper 34 via fasteners, and the first vertical portion 362 is fixedly connected to the annular chain 33 via fasteners. The fasteners are screws or bolt-nut assemblies.

[0068] In a material conveying device based on scraper conveyor mechanism 3, the scraper 34 moves below or inside a dense, heavy layer of material, facing significant vertical loads and uneven lateral resistance. To ensure the scraper 34 stably pushes the material, such as... Figure 10 , Figure 12 and Figure 13 As shown, guide rails 37 are provided on the upper and lower parts of the base 31. Rollers 39 are connected to both ends of the scraper 34 via second connectors 38 and fasteners, and the rollers 39 roll on the guide rails 37. The upper guide rail 37 serves as a precise guide for the material conveying stroke, while the lower guide rail 37 serves as a support and reset for the scraper and chain return stroke, thus constraining the scraper 34 throughout the entire reciprocating motion cycle. The fasteners are screws or bolt-nut assemblies.

[0069] Specifically, the second connecting member 38 has an L-shaped structure, comprising a second horizontal portion 381 and a second vertical portion 382 located on one side of the second horizontal portion 381. The second horizontal portion 381 is fixedly connected to the scraper 34 by fasteners, directly transmitting the vertical material pressure and horizontal pushing resistance experienced by the scraper during the pushing process to the second connecting member 38. The second vertical portion 382 is rotatably connected to the roller 39, keeping the rotation axis of the roller 39 horizontal, thereby enabling the roller 39 to precisely fit onto the horizontal raceway surface of the guide rail 37. The roller 39 rolls with low resistance on the guide rail 37, which, as a rigid support reference, forcibly limits the movement trajectory of the roller 39, allowing it to move linearly only along the axial direction of the guide rail.

[0070] The guiding counterflow mechanism 4 is fixedly connected to the discharge end 22 of the silo 2. Before the material reaches the discharge end 22, the guiding counterflow mechanism 4 flips the upper part of the material upward and guides it back to the center of the silo 2. The lower part of the material continues to be conveyed forward between the guiding counterflow mechanism 4 and the scraper conveying mechanism 3. The maximum height of the lower part of the material that continues to be conveyed forward is less than the top height of the discharge port 23, so as to avoid material accumulation at the discharge port 23. In this embodiment of the invention, the guiding counterflow mechanism 4 is a guide inclined plate fixedly set on the inner wall of the discharge end 22 of the silo 2. The guide inclined plate extends inward from the inner wall of the discharge end 22 of the silo 2 and is inclined downward. The top of the guide inclined plate is connected to the inner wall of the discharge end 22, and the bottom edge of the guide inclined plate is lower than the top height of the discharge port 23. Figure 7 As shown, there is a height difference ΔH between the bottom edge of the guide plate and the top of the outlet 23.

[0071] like Figure 8As shown, when the material is pushed towards the discharge end 22 in the hopper 2, the lower layer of material below the bottom edge of the guide plate is not obstructed. Under the continuous thrust of the scraper 34, it maintains its original forward direction and smoothly passes through the lower flow zone, and is discharged from the discharge port 23, achieving efficient and continuous unloading of the material. The upper layer of material above the bottom edge of the guide plate is diverted by the guide plate, and the material rises upward and flows back inward in the upper area of ​​the guide plate. The material flowing back in the opposite direction and the material advancing in the forward direction behind it undergo staggered shearing and convection agitation in the hopper 2. The design of the guide plate avoids excessive material being squeezed and blocked at the discharge port at the same time, making the material flow output by the scraper conveyor 3 more stable and uniform, which greatly benefits the high-precision batching or processing of subsequent processes, while avoiding jamming and wear of the scraper conveyor 3, ensuring the stable operation of the entire conveying and batching system.

[0072] Furthermore, the bottom sidewall of the silo 2 is an inwardly inclined plate from top to bottom, with an inclination angle of 40°~60° (the angle with the horizontal plane). That is, the sidewall of the discharge port 21 is an inclined plate, which orderly guides the material into the scraper conveyor mechanism 3. The inwardly inclined plate reduces the friction between the material and the silo wall, reducing the possibility of material interlocking due to compression and embedding. More preferably, the inclination angle of the inwardly inclined plate is 50°~60°. The lateral width of the silo 2 perpendicular to the material conveying direction is 4~6 meters. Due to the span of 4~6 meters, the downward shear force of the material in the middle under the huge self-gravity load is much greater than the friction of the sidewall and the cohesive force between the materials, thus forming an unbalanced gravity effect in the silo 2, overcoming the bridging phenomenon of materials in the silo 2. At least two parallel scraper conveyor mechanisms 3 are provided below the silo 2, and at least two guide counterflow mechanisms 4 are provided on the inner wall of the discharge end 22 of the silo 2. The scraper conveyor mechanism 3 and the guide counterflow mechanism 4 correspond one-to-one. The stable material discharge is ensured by using multiple sets of scraper conveying mechanisms 3 and guiding counterflow mechanisms 4. In this embodiment of the invention, two scraper conveying mechanisms 3 and two guiding counterflow mechanisms 4 are provided.

[0073] Furthermore, such as Figure 2 and Figure 4As shown, a diverter 5 is installed in the inner cavity of the hopper 2 between two adjacent scraper conveyors 3. The diverter 5 has an inverted "V" shaped cross-section, consisting of two flat plates whose tops converge and connect, while their bottoms slope towards the scraper conveyor 3. Support columns 6 are spaced apart along the conveying direction at the bottom of the diverter 5, providing stable support. A sharp ridge line forms at the tip of the inverted "V" shaped diverter 5, and the entire surface of the diverter 5 lacks any horizontal plane. The two flat plates extend downwards and to the sides from the ridge line, their bottom edges precisely pointing towards and close to the effective pushing boundaries of the corresponding scraper conveyors 3. The inclination angles (angles with the horizontal plane) of the two flat plates are also designed between 40° and 60° to ensure smooth material flow. The diverter 5 converts the vertically downward gravity load into a downward-sloping component force, reducing the vertical stress directly acting on the scraper conveyor 3.

[0074] Example 2:

[0075] The guide counterflow mechanism 4 in Example 1 uses a straight guide ramp. The guide ramp usually bears the gravity and extrusion force of the material falling from the top of the entire hopper. When the blocked material tries to flip back along the ramp, it will collide with the falling material, causing the material to collide, accumulate and re-compact in the counterflow area, thereby weakening the counterflow effect.

[0076] To further improve the technology of Embodiment 1, the guiding counterflow mechanism 4 of Embodiment 2 adopts an arc-shaped guide plate.

[0077] like Figures 14 to 17 As shown, the guiding counterflow mechanism 4 is an arc-shaped guide plate fixedly installed on the inner wall of the discharge end 22 of the hopper 2. The lower half of the arc-shaped guide plate extends from the inner wall of the discharge end 22 into the hopper 2. The bottom edge of the lower half of the arc-shaped guide plate is lower than the top edge of the discharge port 23 (e.g., Figure 17 As shown, there is a height difference ΔH between the bottom edge of the lower half of the arc-shaped guide plate and the top edge of the discharge port 23. The upper half of the arc-shaped guide plate curves upward from the inner wall of the discharge end 22 to form a guiding arc surface 41. The edge of the upper half of the arc-shaped guide plate is in contact with the wall of the hopper 2. The guiding arc surface 41 extends into the hopper 2 and intermittently covers the lower edge of the arc-shaped guide plate. The arrangement of the guiding arc surface 41 extending into the hopper 2 and intermittently covering the lower edge of the arc-shaped guide plate ensures that the material flowing against the current will not affect the material diversion process at the lower edge of the arc-shaped guide plate.

[0078] When the material is pushed as a whole towards the discharge end 22 within the hopper 2, the material as a whole possesses forward kinetic energy and compressive force. For example... Figure 18As shown, when the material comes into contact with the bottom edge of the arc-shaped guide plate, the lower layer of material below the bottom edge of the arc-shaped guide plate is not obstructed. Under the continuous thrust of the scraper 34, it maintains its original forward direction and passes smoothly through the lower flow zone, and is discharged from the outlet 23. The upper layer of material above the bottom edge of the arc-shaped guide plate is diverted by the arc-shaped guide plate, and the material is lifted upwards and flows back inwards in the guide arc surface 41 area, avoiding collision, accumulation and secondary compaction of the material in the backflow zone, thus ensuring the backflow effect.

[0079] On the one hand, the absence of downward pressure from the upper material during the material return process allows the material to smoothly tumble and flow back into the hopper 2; on the other hand, the arc-shaped guide surface 41 reduces the contact friction resistance between the material and the guide and reverse flow mechanism 4, eliminating local stress concentration. These two aspects work together to reduce the overall operating load of the scraper conveyor mechanism 3 and lower the rated power consumption of the drive motor.

[0080] Examples 1 and 2 have the following technical effects:

[0081] The combined action of the scraper conveyor mechanism 3 and the guide counterflow mechanism 4 alters the flow pattern of materials within the silo 2. The scraper conveyor mechanism 3 provides continuous horizontal forward thrust. As materials surge towards the discharge port, the guide counterflow mechanism 4 lifts the upper and middle layers of materials upward and reverses them inward, preventing blockages and jamming at the discharge port 23 of the silo 2 and ensuring stable and continuous material conveying.

[0082] On the one hand, the variable frequency motor can achieve stable conveying speed, and on the other hand, the material thickness at the discharge port is uniform. The two work together to achieve a constant and controllable material supply per unit time, ensuring accurate and uniform raw material ratio in subsequent processes from the source. This effectively avoids problems such as ratio imbalance and unstable product quality caused by material supply fluctuations, while also making the entire conveying and batching process more continuous and reliable.

[0083] The feeding and conveying device of the present invention can not only solve the bridging problem of wood veneer, but also be compatible with various forms of raw materials such as wood chips and sawdust, and meet the continuous feeding of various forms of materials.

[0084] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," and "inner," etc., indicating orientation or positional relationships, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0085] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more of that feature.

[0086] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A material feeding and conveying device, characterized in that, include: Rack (1); The hopper (2) is fixedly installed on the frame (1); the bottom of the side wall of the hopper (2) has a discharge port (21), the hopper (2) has a discharge end (22), and the discharge end (22) has a discharge port (23). The scraper conveyor mechanism (3) is located below the silo (2) and is positioned corresponding to the discharge port (21) of the silo (2); the scraper conveyor mechanism (3) is used to convey the material from the silo (2) to the discharge end (22) and push it out; The guide counterflow mechanism (4) is fixedly connected to the discharge end (22) of the silo (2). Before the material reaches the discharge end (22), the guide counterflow mechanism (4) flips the upper part of the material upward and guides it back to the center of the silo (2). The lower part of the material continues to be conveyed forward between the guide counterflow mechanism (4) and the scraper conveyor mechanism (3). The maximum height of the lower part of the material is less than the top height of the discharge port (23).

2. The feeding and conveying device according to claim 1, characterized in that, The bottom of the side wall of the silo (2) is an inwardly inclined plate from top to bottom, with an inclination angle of 40°~60°.

3. The feeding and conveying device according to claim 1, characterized in that, The lateral width of the silo (2) perpendicular to the material conveying direction is 4 to 6 meters; At least two parallel scraper conveying mechanisms (3) are provided below the silo (2), and at least two guide counterflow mechanisms (4) are provided on the inner wall of the discharge end (22) of the silo (2). The scraper conveying mechanism (3) and the guide counterflow mechanism (4) correspond one to one.

4. The feeding and conveying device according to claim 3, characterized in that, A diverter (5) is provided in the inner cavity of the hopper (2) between two adjacent scraper conveying mechanisms (3); the cross section of the diverter (5) is an inverted "V" shaped structure, consisting of two guide plates, with the tops of the two guide plates converging and connected, and the bottoms of the two guide plates tilting towards the scraper conveying mechanism (3). The bottom of the diverter (5) is provided with support columns (6) arranged at intervals along the conveying direction. The support columns (6) are used to stably support the diverter (5).

5. The feeding and conveying device according to claim 1, characterized in that, The scraper conveyor mechanism (3) is equipped with: - The base (31) is located below the hopper (2); -Sprocket (32), including two symmetrically arranged sprocket sets, each sprocket set consisting of two sprockets (32) arranged in the front and rear along the conveying direction; - Two ring chains (33) are provided, which are respectively fitted on two sets of sprockets (32); the front and rear ends of the ring chains (33) extend laterally to the discharge port (21) of the discharge bin (2); the ring chains (33) have an upper conveying section (331) and a lower return section (332). - A drive motor is mounted on the base (31) and driven to one of the sprockets (32) to provide driving force for the ring chain (33); - Multiple scrapers (34) are spaced apart, and their two ends are fixedly connected to two annular chains (33) respectively; the extension direction of the scrapers (34) is perpendicular to the material conveying direction; - The pallet (35) is fixedly installed on the base (31) and corresponds to the space between the conveying sections (331) of the two ring chains (33), located below the corresponding scraper (34) of the conveying sections (331) of the two ring chains (33); The drive motor drives the sprocket (32) to rotate, which in turn drives the two ring chains (33) to rotate, which in turn drives the scraper (34) to move. The material falls from the discharge port (21) of the hopper (2) onto the pallet (35), and the scraper (34) corresponding to the conveying section (331) of the ring chain (33) pushes the material forward.

6. The feeding and conveying device according to claim 5, characterized in that, The drive motor is a variable frequency motor, and its speed is adaptively adjusted according to the material ratio and conveying speed.

7. The feeding and conveying device according to claim 5, characterized in that, The scraper (34) is fixedly connected to the annular chain (33) by the first connector (36) and fasteners.

8. The feeding and conveying device according to claim 5, characterized in that, The upper and lower parts of the base (31) are provided with guide rails (37). The scraper (34) has rollers (39) connected to both ends by a second connector (38) and fasteners, and the rollers (39) roll on the guide rail (37).

9. The feeding and conveying device according to claim 1, characterized in that, The guide counterflow mechanism (4) is a guide plate fixedly installed on the inner wall of the discharge end (22) of the silo (2). The guide plate extends from the inner wall of the discharge end (22) of the silo (2) inward and is inclined downward. The top of the guide plate is connected to the inner wall of the discharge end (22), and the bottom edge of the guide plate is lower than the top height of the discharge port (23). During the process of conveying the material toward the discharge end (22), by utilizing the positive propulsion force of the material flow, some of the material climbs up along the slope of the guide plate and flips back into the silo (2).

10. The feeding and conveying device according to claim 1, characterized in that, The guide counterflow mechanism (4) is an arc-shaped guide plate fixedly installed on the inner wall of the discharge end (22) of the silo (2). The lower half of the arc-shaped guide plate extends from the inner wall of the discharge end (22) into the silo (2). The bottom edge height of the lower half of the arc-shaped guide plate is lower than the top height of the discharge port (23). The upper half of the arc-shaped guide plate bends upward from the inner wall of the discharge end (22) to form a guiding arc surface (41); the edge of the upper half of the arc-shaped guide plate is connected to the wall of the hopper (2); the guiding arc surface (41) extends into the hopper (2) and intermittently covers the lower half of the arc-shaped guide plate.

Images