Arc-shaped self-cleaning type assembled impeller discharging mechanism and drying machine applying discharging mechanism

Abstract

An arc-shaped self-cleaning type assembly impeller discharging mechanism comprises a shell, a rotating shaft, blades and a motor. The motor drives the rotating shaft to rotate; the shell comprises a lower plate, a left side plate, an upper plate and a right side plate which are connected in sequence; the rotating shaft is connected between the left side plate and the right side plate, and is connected with a plurality of blades; the blade comprises a blade main body; the blade main body is in a rectangular plate shape and is connected to the rotating shaft; the top end surface of the shell is an open feeding hole; the lower part of the upper plate is provided with a first bent edge which is folded outwards, and the first bent edge points to the inclined upper part; the lower part of the lower plate is firstly bent into an arc shape, and the tail part of the arc-shaped part is provided with a second bent edge which is folded outwards; the second bent edge points to the inclined lower part; the bottom end face, formed by the first bent edge and the second bent edge, of the shell is provided with a discharging opening. And after the blades rotate, one part of a path swept by the outer edge of the blade main body is outside the discharge port. According to the drying machine applying the discharging mechanism, an outlet in the lower portion of the drying machine body is vertically downward and connected with a feeding port of the discharging mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of grain and oil machinery technology, specifically an arc-shaped self-cleaning assembly impeller discharge mechanism and a dryer using the discharge mechanism. Background Technology

[0002] Grain dryers are common grain drying equipment. The most common types include tower dryers and box-type circulating dryers. Their principle is mainly to achieve the drying effect by directly blowing hot air onto the grain.

[0003] Existing grain dryers mostly use auger or welded impeller discharge mechanisms. These discharge mechanisms are designed for discharging powdery or granular materials such as sand and gravel. Directly using them for discharging grains (such as corn, wheat, and rice) after drying has the following disadvantages:

[0004] 1. The auger discharge mechanism has a high rotation speed, which makes it very easy to crush grains, reduce the rice yield, and increase the breakage rate of grains such as corn;

[0005] 2. Welded impeller-type discharge mechanisms often use straight welded blades. The sharp edges of these blades easily shear the grain directly, causing the breakage issues mentioned above. During the discharge process, the sharp edges can easily trap straw, leading to localized blockages and uneven discharge, thus affecting drying efficiency. Blockages can also cause grain retention, resulting in uneven moisture content in the output and greatly increasing the risk of fire.

[0006] Neither of these two discharge mechanisms has a cleaning device, allowing grain residue to remain inside the housing. Long-term residue can lead to mold, sprouting, and weed growth, hindering subsequent machine startup. This residue also makes it difficult to switch to different types of grains for drying, especially seeds. Both discharge mechanisms are one-piece structures with blades directly welded to the main shaft; once damaged or worn, they cannot be repaired and the entire component must be replaced, impacting production schedules, increasing maintenance costs, and requiring long manufacturing cycles if replacements are unavailable, which is detrimental to the need for continuous operation throughout the drying season. Summary of the Invention

[0007] In order to solve the problems existing in the prior art and improve the output quality and ease of use of the grain dryer, the present invention proposes an arc-shaped self-cleaning assembled impeller discharge mechanism, and a grain dryer using the discharge mechanism.

[0008] An arc-shaped self-cleaning assembly impeller discharge mechanism, the discharge mechanism comprising: a housing, a rotating shaft, blades, and a motor; the motor drives the rotating shaft to rotate;

[0009] The housing includes a lower plate, a left side plate, an upper plate, and a right side plate connected in sequence;

[0010] The rotating shaft is rotatably connected between the left and right side plates via a bearing device. Multiple blades are detachably and evenly connected to the rotating shaft. Each blade includes a blade body and a blade connecting structure. The blade body is a rectangular plate and is vertically connected to the rotating shaft via the blade connecting structure. The axis of the rotating shaft lies in the plane containing one side of the blade body.

[0011] The top surface of the shell is open, serving as the feed inlet;

[0012] The lower part of the upper plate has a first folded edge that folds outward. The first folded edge points diagonally upward, meaning that the front edge of the first folded edge is lower than the rear edge.

[0013] The lower part of the lower plate is first bent into an arc shape, and at the tail of the arc part there is a second bend that folds outward; the shape of the arc part corresponds to the shape of the path swept by the outer edge of the blade body after the blade rotates; the second bend points diagonally downward, that is, the front edge of the second bend is higher than the rear edge;

[0014] The plane containing the rear edge of the first bend and the front edge of the second bend forms the bottom surface of the shell, which is the discharge port.

[0015] The left and right side plates respectively seal the lower and upper plates, and the upper and lower edges of the left and right side plates are respectively on the plane of the feed inlet and the discharge outlet;

[0016] After the blade rotates, part of the path swept by the outer edge of the blade body is outside the discharge port, and the other part is inside the discharge port.

[0017] Furthermore, the blade body has a third bent edge (its radial cross-section is arc-shaped) facing away from the direction of rotation of the rotating shaft, and the outer edge of the third bent edge is the outer edge of the blade body.

[0018] Furthermore, a scraper plate is connected to the blade body, and the scraper plate is attached to the side of the blade body; the distance between the outer edge of the scraper plate and the axis of rotation is greater than the distance between the outer edge of the blade body and the axis of rotation. The scraper plate is made of a wear-resistant soft material, such as a wear-resistant rubber plate.

[0019] Furthermore, a guide plate is connected to the rear edge of the second bend, with the guide plate facing the rear of the second bend.

[0020] Specifically, the blade is made of a whole sheet material through bending. The radial section of the blade is U-shaped. The first side of the U-shape is the blade body, and the bottom and second sides of the U-shape are the blade connection structure.

[0021] For two adjacent blades, the second side of the preceding blade fits against the first side of the following blade and is fixed by a short bolt;

[0022] In a pair of blades symmetrical about the axis of rotation: one or more parallel long bolts pass through the bottom edge of one blade, the two side walls of the shaft, and then through the bottom edge of the other blade, and finally screw on the nut.

[0023] The sweeping plate is connected to the blade body by short bolts on the blade body.

[0024] A dryer includes a dryer body, with an inlet and an outlet respectively on the upper and lower parts of the dryer body, the outlet being vertically downward and connected to the aforementioned discharge mechanism.

[0025] If there are multiple outlets, for each outlet located on the same straight line, the rotating shafts of their connecting discharge mechanisms are connected sequentially through couplings and driven by the same motor.

[0026] This design utilizes curved, plate-like blades that avoid shearing against grains and prevent entanglement with straw or other impurities, making it suitable for reliable discharge of various materials. The blades feature a modular structure, ensuring strength and wear resistance while facilitating replacement and reducing maintenance costs. A self-cleaning device (sweeping plate) is added to promote thorough grain discharge. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the dryer structure in this embodiment;

[0028] Figure 2 This is a schematic diagram of the material feeding mechanism;

[0029] Figure 3 This is a schematic diagram of the internal structure of the material feeding mechanism. Figure 2 (Right-side perspective)

[0030] Figure 4 This is a schematic diagram of the blade. Figure 2 (Right-side perspective)

[0031] In the diagram: 1. Dryer body; 2. Inlet; 3. Outlet; 4. Discharge mechanism; 5. Coupling; 6. Housing; 7. Rotating shaft; 8. Blade; 9. Motor; 10. Lower plate; 11. Left side plate; 12. Upper plate; 13. Right side plate; 14. Blade body (i.e., first side); 15. Feed inlet; 16. First bent edge; 17. Second bent edge; 18. Discharge port; 19. Third bent edge; 20. Sweeping plate; 21. Guide plate; 22. Bottom edge; 23. Second side; 24. Short bolt; 25. Long bolt. Detailed Implementation

[0032] The technical solution will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] refer to Figure 2 and Figure 3An arc-shaped self-cleaning assembly impeller discharge mechanism includes: a housing 6, a rotating shaft 7, blades 8 and a motor 9; the motor drives the rotating shaft to rotate.

[0034] The housing includes a lower plate 10, a left side plate 11, an upper plate 12, and a right side plate 13 connected in sequence;

[0035] The rotating shaft 7 is rotatably connected between the left and right side plates via a bearing device. Multiple blades are detachably and evenly connected on the rotating shaft. Each blade includes a blade body 14 and a blade connecting structure. The blade body is a rectangular plate and is vertically connected to the rotating shaft 7 via the blade connecting structure. The axis of the rotating shaft lies in the plane containing one side of the blade body.

[0036] The top surface of the shell is open, serving as the feed inlet 15;

[0037] The lower part of the upper plate 12 has a first folded edge 16 that folds outward. The first folded edge points diagonally upward, that is, the front edge of the first folded edge is lower than the rear edge.

[0038] The lower part of the lower plate 10 is first bent into an arc shape, and there is a second bending edge 17 that folds outward at the tail of the arc part; the shape of the arc part corresponds to the shape of the path swept by the outer edge of the blade body after the blade rotates; the second bending edge points diagonally downward, that is, the front edge of the second bending edge is higher than the rear edge.

[0039] The plane containing the rear edge of the first bend and the front edge of the second bend forms the bottom surface of the shell, which is the discharge port 18.

[0040] The left side plate 11 and the right side plate 13 respectively seal the lower plate 10 and the upper plate 12 on both sides, and the upper and lower edges of the left side plate and the right side plate are respectively on the plane of the feed inlet and the discharge outlet;

[0041] After the blade rotates, part of the path swept by the outer edge of the blade body is outside the discharge port, and the other part is inside the discharge port.

[0042] In this example:

[0043] The blade body has a third bend 19 facing away from the direction of rotation of the shaft, and the outer edge of the third bend is the outer edge of the blade body.

[0044] A sweeping plate 20 is connected to the blade body and is attached to the side of the blade body; the distance between the outer edge of the sweeping plate and the axis of rotation is greater than the distance between the outer edge of the blade body and the axis of rotation.

[0045] The rear edge of the second bend 17 is connected to a guide plate 21, which faces the rear of the second bend.

[0046] Further reference Figure 4The blade 8 is made of a whole sheet material through bending. The radial section of the blade is U-shaped. The first side of the U-shape is the blade body 14. The bottom side 22 and the second side 3 of the U-shape constitute the blade connection structure.

[0047] For two adjacent blades, the second side 3 of the preceding blade fits against the first side (blade body 14) of the following blade and is fixed by a short bolt 24.

[0048] For a pair of blades symmetrical about the axis of rotation: one or more parallel long bolts 25 (two in this example) pass through the bottom edge of one blade, the two side walls of the shaft, and then through the bottom edge of the other blade, and finally screw on the nut.

[0049] The sweeping plate 20 is connected to the blade body 14 by short bolts 24 on the blade body.

[0050] Reference 1, a dryer includes a dryer body 1, with an inlet 2 and an outlet 3 for grains located at the upper and lower parts of the dryer body, respectively, and the outlet facing vertically downward and connected to the feed inlet of the aforementioned discharge mechanism 4.

[0051] There are multiple outlets; for each outlet located on the same straight line, the rotating shafts of the discharge mechanism connected to them are connected in sequence through coupling 4 and driven by the same motor 9.

[0052] In this embodiment:

[0053] ① The blades are made of wear-resistant steel and CNC machined into universal, interchangeable blades. The curved outer bevel (i.e., the third bend edge) of the blades makes smooth contact with the grains. During the discharge process, the grains are not mechanically sheared, squeezed, or crushed, and are less likely to be left behind, entangled with impurities, or clogged, thus improving the quality and safety of the dried grains.

[0054] ② The blades have mounting holes, and the impeller shaft also has mounting holes. Short bolts connect the blades to each other, while long bolts connect the blades to the shaft. This close fit between the blades increases the overall strength.

[0055] The prefabricated blade design has a long service life and is easy to replace even when worn. Only the worn blade parts need to be replaced, without replacing the main shaft. The prefabricated structure makes replacement convenient and maintenance costs low.

[0056] ③ The sweeping plate of the self-cleaning device is made of wear-resistant, soft material and is mounted on the blades. It can rotate with the impeller and sweep away residual grains. The self-cleaning device ensures that no grains remain in the discharge mechanism housing and will not become moldy. It requires no cleaning, prevents seed mixing, and is suitable for changing varieties and drying seeds.

[0057] This feeding mechanism is suitable for a wide variety of grains.

Claims

1. An arcuate self-cleaning assembly impeller discharge mechanism characterized by The utility model relates to an arc self-cleaning type assembled impeller discharge mechanism, which comprises a shell, a rotating shaft, blades and a motor. The shell comprises a lower plate, a left side plate, an upper plate and a right side plate connected in sequence. The rotating shaft is rotatably connected between the left and right side plates through a bearing device, and a plurality of blades are detachably and uniformly connected to the rotating shaft. The blade main body is a rectangular plate, and the blade main body is vertically connected to the rotating shaft through the blade connecting structure, and the axis of the rotating shaft is in the plane of the side surface of the blade main body. The top end surface of the shell is open, serving as a feeding port. The lower part of the upper plate is outwardly folded into a first bent edge, which is directed obliquely upward, i.e., the front edge of the first bent edge is lower than the rear edge. The lower part of the lower plate is first folded into an arc shape, and the tail part of the arc-shaped part is outwardly folded into a second bent edge. The rear edge of the first bent edge and the front edge of the second bent edge form the bottom end surface of the shell, and the bottom end surface of the shell is a discharge port. The left and right side plates respectively seal the two sides of the lower and upper plates, and the upper and lower edges of the left and right side plates are respectively in the planes of the feeding port and the discharge port. The path swept by the outer edge of the blade main body after the rotation of the blade has a part outside the discharge port and another part inside the discharge port.

2. The arc-shaped self-cleaning assembly impeller discharge mechanism of claim 1, wherein The blade main body has a third bent edge directed against the rotation direction of the rotating shaft, and the outer edge of the third bent edge is the outer edge of the blade main body.

3. The arc-shaped self-cleaning assembly impeller discharge mechanism according to claim 1, characterized in that A sweeping plate is connected to the blade main body, and the sweeping plate is attached to the side surface of the blade main body.

4. The arc-shaped self-cleaning assembly impeller discharge mechanism of claim 1, wherein The rear edge of the second bent edge is connected to a guide plate, which is directed toward the rear of the second bent edge.

5. The arc self-cleaning type assembled impeller discharge mechanism according to claim 1, wherein the blade is formed by bending an integral plate, and the radial cross section of the blade is U-shaped, the first side edge of the U-shaped blade is the blade main body, and the bottom edge and the second side edge of the U-shaped blade are the blade connecting structure. For the two adjacent blades, the second side edge of the former blade is attached to the first side edge of the latter blade and is fixed by a short bolt. In the pair of blades symmetrical about the axis of the rotating shaft, one or a plurality of parallel long bolts are sequentially passed through the bottom edge of one blade, the two side walls of the rotating shaft, and then the bottom edge of the other blade, and finally a nut is screwed.

6. The arc-shaped self-cleaning assembly impeller discharge mechanism of claim 3, wherein The sweeping plate is connected to the blade main body by the short bolt on the blade main body.

7. A dryer using the discharging mechanism according to any one of claims 1 to 6, comprising a main body of the dryer, an inlet and an outlet for grains being formed at the upper and lower portions of the main body, respectively, characterized in that The outlet is vertically downward and is connected to the feeding port of any one of the discharge mechanisms according to claims 1-6.

8. The dryer of claim 7, characterized in that the outlet There are a plurality of outlets, and the rotating shafts of the discharge mechanisms connected by the outlets on the same straight line are sequentially connected through couplings and are driven by the same motor.

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