Push-pull turning plate type discharging device

Abstract

A push-pull turning plate type discharging device comprises a trough, an angular box, a turning plate and a turning plate action driving mechanism. The main body of the trough is of a cuboid-shaped hollow box body structure; a plurality of angular boxes are connected in the hollow part of the trough; the radial section of the angular box is arrow-shaped; the plurality of angular boxes are arranged in parallel along the length direction of the trough; the front edge of the first angular box and the rear edge of the last angular box are attached to the front wall and the rear wall of the hollow box body respectively. A blanking opening is reserved between every two adjacent angular boxes; a turning plate is rotationally connected below the blanking opening, and the rotating axis of the turning plate is parallel to the axis of the angular box; the turning plate action driving mechanism is connected with the turning plate; when the turning plate is located at the rotation final position, the turning plate seals the blanking port; the turning plate action driving mechanism comprises a pull rod and a pull rod action driving device; the pull rod is parallel to the length direction of the trough; the pull rod action driving device is an air cylinder or a hydraulic cylinder; piston rods of the air cylinders or the hydraulic cylinders are connected with the pull rods through connecting rods, and the turning plates are connected to the pull rods.

Description

Technical Field

[0001] This utility model belongs to the field of grain machinery technology, specifically a push-pull flip-plate discharge device that can be used in grain dryers. Background Technology

[0002] In existing grain dryers, the discharge mechanism is most commonly based on impeller or sliding valve types, each with its own advantages and disadvantages. For example, impeller discharge offers a wide range of speed regulation with frequency conversion control, but it easily crushes granular materials and can easily entangle impurities. The sprocket and chain drive structure is relatively complex and requires frequent lubrication and maintenance, making it unsuitable for large granular materials (such as camellia seeds, which are large and brittle and easily crushed) or small granular materials (such as rapeseed, which are small and easily leak out from the gaps in the discharge mechanism).

[0003] Meanwhile, all of the above structures must be driven by dedicated geared motors. In grain drying operations with a lot of dust, the electrical sparks generated by the motors pose a safety hazard. The motors are also more sensitive to the humidity and cleanliness of the environment and are more susceptible to electrical problems such as short circuits, overvoltages, and overcurrents, resulting in a higher risk of failure.

[0004] In summary, the existing discharge mechanisms for grain dryers are insufficient in terms of reliability and versatility. Summary of the Invention

[0005] To increase the reliability and versatility of the discharge mechanism, a push-pull flip-plate discharge device specifically designed for grain dryers has been developed, expanding the range of materials that the dryer can handle.

[0006] The push-pull flip-plate discharge device of this utility model includes a material trough, a corner box, a flip plate and a flip plate action drive mechanism;

[0007] The main body of the material trough is a hollow box structure in the shape of a cuboid, with the top and bottom surfaces of the trough being open.

[0008] Multiple angular boxes are connected inside the hollow material trough; the radial cross-section of the angular boxes is arrow-shaped; the multiple angular boxes are arranged parallel to each other along the length of the material trough and have the same height, and the axial direction of the angular boxes is perpendicular to the length of the material trough; the leading edge of the first angular box and the trailing edge of the last angular box are respectively attached to the front wall and the rear wall of the hollow box body; there is a gap between adjacent angular boxes, and the projection of the gap on the bottom surface of the material trough is rectangular, and the gap constitutes the material discharge port;

[0009] The flap is rotatably connected below the gap, and the axis of rotation of the flap is parallel to the axis of the corner box; the flap is connected to the flap by a flap action drive mechanism; when the flap is at the end position of rotation, the flap seals the material outlet; when the flap is in other positions, the flap deviates from the material outlet.

[0010] The flapper actuation drive mechanism includes a pull rod and a pull rod actuation drive device; the pull rod is parallel to the length direction of the trough; the pull rod actuation drive device is a cylinder or a hydraulic cylinder; the piston rod of the cylinder or hydraulic cylinder is connected to the pull rod through a connecting rod, and each flapper is connected to the pull rod. The piston rod pushes and pulls the pull rod, thereby driving the flapper to rotate around its rotation axis. The piston rod and connecting rod, as well as the connecting rod and pull rod, are rotatably connected, and the rotation axis is parallel to the rotation axis of the flapper.

[0011] Furthermore, a discharge cone is connected below the material trough; the large opening end of the discharge cone is at the top; the large opening end of the discharge cone is connected to the bottom opening end of the material trough; the small opening end of the discharge cone is connected to a flow-limiting discharge valve; and a mechanical level indicator is installed inside the discharge cone.

[0012] Furthermore, the radial cross-section of the flap is arc-shaped; the flap is fixedly connected to the bottom end of a rocker arm, the top end of the rocker arm is connected to the side wall of the trough through a rotating shaft, and the rotating shaft is located above the discharge port; one side of the flap is connected to a downward protrusion, the protrusion is connected to a rotating shaft, and the rotating shaft is fitted into a hole on the pull rod.

[0013] —Compared to flat-shaped flaps, curved flaps have better structural error redundancy between themselves and the material discharge port, and can accept slight incomplete flap movement.

[0014] Specifically, the lever actuation drive device is located after the end of the lever; the lever actuation drive device is outside the material trough, and a through hole for the piston rod to enter and exit is opened on the wall of the material trough, and there is a sealing structure (such as a shaft seal) between the through hole and the piston rod.

[0015] The mechanical structure inside the feed trough is highly reliable and not easily damaged. In contrast, the drive unit uses gas / liquid pipelines, sealing rings, etc., which have a certain service life. Placing the drive unit outside the feed trough makes it easy to replace.

[0016] Furthermore, the outer walls of the two sides of the angular box have outwardly protruding indentations that form guiding ridges (also serving as reinforcing ribs).

[0017] Furthermore, the bottom edges of both sides of the angular box have inwardly bent edges; the outer surface of the bent edges has a sealing layer (e.g., an elastic rubber layer). In this structure, the two bent edges corresponding to the material discharge port face outwards from the material discharge port.

[0018] —By bending the edge, the sealing layer is separated from the material discharge channel, preventing material from rubbing against it. At the same time, the bent edge is arc-shaped, which allows it to fit better with the arc-shaped flap through the sealing layer, making it compatible with situations where the flap movement is slightly incomplete.

[0019] This discharge device uses a mechanical push-pull structure, powered by pneumatic or hydraulic actuation, which improves the applicability of the discharge mechanism and has high reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structural principle of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the material discharge mechanism in the closed state;

[0022] Figure 3 This is a schematic diagram of the state of the material discharge mechanism at the moment it is opened;

[0023] Figure 4 This is a schematic diagram of the material discharge mechanism in a state of flow restriction and uniform material discharge;

[0024] Figure 5 This is a schematic diagram of the angular box structure. Figure 1 (Top-down view)

[0025] Figure 6 This is a schematic diagram of the angular box structure. Figure 1 (from the perspective)

[0026] Figure 7 This is a schematic diagram of the flip-board action drive mechanism. Figure 1 (Left-hand view)

[0027] In the diagram: 1. Material trough; 2. Corner box; 3. Flip plate; 4. Material discharge port; 5. Pull rod; 6. Rocker arm; 7. Pull rod drive device; 8. Piston rod; 9. Connecting rod; 10. Discharge cone; 11. Flow-limiting discharge valve; 12. Mechanical material leveler; 13. Protrusion; 14. Guide ridge; 15. Bending edge; 16. Rotating shaft; 17. Side plate. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] refer to Figure 1 A push-pull flap-type discharge device includes a material trough 1, an angular box 2, a flap 3, and a flap action drive mechanism;

[0030] The main body of the material trough is a hollow box structure in the shape of a cuboid, and the top and bottom surfaces of the material trough 1 are open.

[0031] Multiple angular boxes 2 are connected inside the hollow space of the material trough 1; (further reference) Figure 6 The radial cross-section of the angular box is arrow-shaped; multiple angular boxes are arranged parallel to each other along the length of the material trough and have the same height, and the axial direction of the angular boxes is perpendicular to the length of the material trough; the leading edge of the first angular box and the trailing edge of the last angular box are respectively attached to the front wall and the rear wall of the hollow box; there is a gap between adjacent angular boxes, and the projection of the gap on the bottom surface of the material trough is rectangular, and the gap constitutes the material discharge port 4;

[0032] The flap 3 is rotatably connected below the gap, and the rotation axis of the flap is parallel to the axis of the angular box; the flap's action drive mechanism is connected to the flap; (further reference) Figures 2-4 When the flap is at the end position of rotation, the flap seals the material discharge port; when the flap is in other positions, the flap deviates from the material discharge port.

[0033] The flapper actuation drive mechanism includes a pull rod 5 and a pull rod actuation drive device; the pull rod is parallel to the length direction of the material trough; the pull rod actuation drive device is a cylinder or a hydraulic cylinder (in large-scale production sites, a cylinder is recommended, and a high-pressure air source from the factory can be used); the piston rod 8 of the cylinder or hydraulic cylinder is connected to the pull rod 5 via a connecting rod 9, and each flapper is connected to the pull rod. The piston rod pushes and pulls the pull rod, thereby driving the flapper to rotate around the rotation axis. The piston rod and the connecting rod, as well as the connecting rod and the pull rod, are rotatably connected, and the rotation axis is parallel to the rotation axis of the flapper.

[0034] A discharge cone 10 is connected below the material trough 1; the large opening end of the discharge cone is at the top; the large opening end of the discharge cone is connected to the bottom opening end of the material trough; the small opening end of the discharge cone is connected to the flow-limiting discharge valve 11; a mechanical level indicator 12 is installed inside the discharge cone.

[0035] The radial cross-section of the flap 3 is arc-shaped; the flap is fixedly connected to the bottom end of a rocker arm 6, the top end of the rocker arm 6 is connected to the side wall of the material trough 1 through a rotating shaft 16, and the rotating shaft is located above the material discharge port 4; a downward protrusion 13 is connected to one side of the flap, and the protrusion is connected to the rotating shaft 16, which is fitted into the hole on the pull rod.

[0036] Further reference Figure 7 The implementation structure in this example also includes side plates 17. There are two side plates, which are distributed at both ends of the flip plate 3. The side plates are rotatably connected to the side wall of the trough via rocker arms 6, and the protrusion 13 is part of the side plate. When the piston rod pushes or pulls the lever, the lever drives the rocker arm to swing through the side plates, thereby enabling the flip plate to achieve a reciprocating flipping motion.

[0037] The lever actuation drive device (in this example, a cylinder) is located after the end of the rocker arm; the lever actuation drive device is outside the feed trough, and a through hole for the piston rod 8 to enter and exit is opened on the feed trough wall, and there is a sealing structure between the through hole and the piston rod.

[0038] Further reference Figure 5 and Figure 6 The outer walls of the two sides of the angular box 2 have outwardly protruding indentations forming guide ridges 14. The bottom edges of the two sides of the angular box 2 have inwardly bent edges 15; the outer surface of the bent edges has a sealing layer.

[0039] Explanation of the principle of this material feeding mechanism.

[0040] See again Figures 2-4This material discharge mechanism uses a universal standard cylinder (or hydraulic cylinder) with piston rod to push and pull connecting rod. The connecting rod drives the rocker arm to swing, thereby enabling the flap to reciprocate and flip.

[0041] When the flap is tilted, the material is discharged under its own weight; when the flap is in the horizontal position, it is in the closed state and the material discharge stops.

[0042] During the project implementation, components such as the flap and the corner box above it are made of high-strength galvanized sheet to meet the requirements of wear resistance and corrosion resistance.

[0043] The connecting rod and rocker arm are made of 10-12mm thick Q235-A steel and are processed by CNC laser cutting. The connecting rod, rocker arm and cylinder (or hydraulic cylinder) all hinge points use graphite composite copper sleeves as sliding bearings to ensure reliable rotation of each hinge point and facilitate maintenance and replacement.

[0044] Because pneumatic tipping discharge mechanisms discharge material intermittently, the material may suddenly be discharged in a relatively large amount, which may cause a certain impact on the downstream conveying equipment. To avoid this situation, an adjustable flow limiting device (such as an adjustable valve) is installed at the bottom of the discharge cone. This allows the material discharged each time to be temporarily stored in the cone for a period of time and then discharged slowly and evenly. A mechanical level gauge can be installed in the cone to detect the material storage status.

[0045] This flap-type discharge mechanism is suitable for a wider range of grains, without mechanically crushing or breaking them, and without leaving or entangled impurities. Even small particles are virtually guaranteed to not leak. The discharge is uniform, causing no impact on downstream equipment and preventing blockages and leaks. All moving joints use graphite composite copper bushings, ensuring smooth operation and extending the mechanism's service life. It uses standard pneumatic or hydraulic cylinders, making maintenance and replacement more convenient and economical.

Claims

1. A push-pull flap discharge apparatus characterized by The utility model provides a material slot, a corner box, a flap and a flap action driving mechanism. The main body of the material slot is a hollow box structure in the shape of a cuboid, and the top surface and the bottom surface of the material slot are open. A plurality of corner boxes are connected in the hollow of the material slot. The radial section of the corner box is in the shape of an arrowhead. The plurality of corner boxes are arranged in parallel along the length direction of the material slot and have the same height. The axial direction of the corner box is perpendicular to the length direction of the material slot. The front edge of the first corner box and the rear edge of the last corner box are respectively attached to the front wall and the rear wall of the hollow box body. A gap is left between adjacent corner boxes. The projection of the gap on the bottom surface of the material slot is a rectangle, and the gap constitutes a material drop opening. The flap is rotationally connected below the gap. The rotation axis of the flap is parallel to the axial direction of the corner box. The flap action driving mechanism is connected to the flap. When the flap is at the rotation end position, the flap seals the material drop opening. When the flap is in other positions, the flap deviates from the material drop opening. The flap action driving mechanism includes a pull rod and a pull rod action driving device. The pull rod is parallel to the length direction of the material slot. The pull rod action driving device is a pneumatic cylinder or a hydraulic cylinder. The piston rod of the pneumatic cylinder or the hydraulic cylinder is connected to the pull rod through a connecting rod, and each flap is connected to the pull rod. A discharge cone is connected below the material slot. The large opening end of the discharge cone is upward. The large opening end of the discharge cone is connected to the bottom opening end of the material slot. The small opening end of the discharge cone is connected to a limited discharge valve. A mechanical material leveler is installed in the discharge cone. The radial section of the flap is arc-shaped. The flap is fixedly connected to the bottom end of a rocker. The top end of the rocker is connected to the side wall of the material slot through a rotating shaft, and the rotating shaft is located above the material drop opening. One side of the flap is connected to a downward protruding part. The protruding part is connected to a rotating shaft, and the rotating shaft is sleeved in a hole on the pull rod. The pull rod action driving device is located behind the end of the pull rod. The pull rod action driving device is located outside the material slot. A through hole is opened on the wall of the material slot for the piston rod to enter and exit. There is a sealing structure between the through hole and the piston rod. The outer walls of the two side edges of the corner box have outwardly protruding indentation structures to form guide protruding ribs. The bottom edges of the two side edges of the corner box have inwardly bent edges. The outer surface of the bent edge has a sealing layer.

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