A special-shaped grading roller with adjustable grading effect

Abstract

The application discloses a special-shaped grading roller with adjustable grading effect, which comprises a middle shaft and a plurality of net-shaped sieve surfaces, all the net-shaped sieve surfaces being combined to form a cylinder body arranged around the middle shaft; the net-shaped sieve surface is flexible, and a rigid rod is arranged between the edges of adjacent net-shaped sieve surfaces; the special-shaped grading roller further comprises an adjusting mechanism, which can act on all the rigid rods to make all the rigid rods move close to or away from the middle shaft in the radial direction of the middle shaft. In the application, the rigid rods are close to or away from the middle shaft under the action of the adjusting mechanism, the bending degree of the net-shaped sieve surface can be changed, the shape of the whole cylinder body can be changed, the material in the special-shaped grading roller is changed under the action of the special-shaped grading roller when the special-shaped grading roller rotates around the middle shaft, the distribution state of the material in the special-shaped grading roller can be changed, and the adjustment of the grading effect and the grading efficiency can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural material screening, in particular to a special-shaped grading roller with adjustable grading effect. BACKGROUND

[0002] In agricultural production, grading of seeds is an important process. On the one hand, grading can remove damaged, deformed, diseased, and underfilled seeds, ensuring that high-quality, high-vigor seeds are sown. On the other hand, through grading, seeds of similar sizes can be effectively separated, which facilitates subsequent differentiation in storage and sale, and it is more convenient to manage and maintain the graded seeds uniformly.

[0003] The application of grading tools such as grading screens for seed grading plays an indispensable role in agricultural production. As a commonly used device in seed grading, the cylindrical screen shown in patent CN107999370A is widely used due to its simple structure, convenient operation, and high grading efficiency. By adjusting the aperture size and rotational speed of the cylindrical screen, seeds can be accurately separated according to physical properties such as size and shape, meeting different planting needs, and it is an important tool for realizing fine management of seeds and efficient agricultural production. However, this type of cylindrical screen has a single shape, and the range of motion activity of the material in it is limited, making it difficult to further improve the grading effect and grading effect. SUMMARY

[0004] The present application provides a special-shaped grading roller with adjustable grading effect that can improve the grading efficiency and adjust the structure shape as needed.

[0005] Technical solution: To achieve the above purpose, the special-shaped grading roller with adjustable grading effect of the present application comprises a middle shaft and a plurality of mesh screens, all of which enclose a cylindrical body arranged around the middle shaft.

[0006] The mesh screen has flexibility, and a rigid rod is arranged between the edges of adjacent mesh screens.

[0007] The special-shaped grading roller further comprises an adjusting mechanism that can act on all the rigid rods to make all the rigid rods move closer or farther away in the radial direction of the middle shaft.

[0008] Further, the mesh screen has a pre-bending radius or a pre-bending angle to facilitate deformation of the mesh screen under stress, and the bending direction is a preset direction.

[0009] Further, the adjusting mechanism comprises a driving hub fixedly installed relative to the central shaft, the driving hub has a plurality of radially extending guide sliding spokes, the number of the guide sliding spokes is equal to and one-to-one corresponding to the number of the rigid rods; the end of the rigid rod is installed with a sliding block slidingly matched with the corresponding guide sliding spoke; the adjusting mechanism further comprises a driving mechanism capable of driving all the sliding blocks to move together.

[0010] Further, the driving mechanism comprises an adjusting disc, a plurality of first connecting rods are rotationally connected on the adjusting disc; the number of the first connecting rods is equal to and one-to-one corresponding to the number of the sliding blocks; the adjusting disc can be rotationally adjusted in position relative to the driving hub and can be fixed relative to the driving hub.

[0011] Further, a plurality of arc-shaped holes are formed on the adjusting disc, a plurality of fixing holes equal in number to the arc-shaped holes are formed on the driving hub, specifically, the driving hub comprises an inner disc body and an outer ring body, the guide sliding spokes are formed between the inner disc body and the outer ring body, and the fixing holes are formed on the inner disc body; a bolt passing through the arc-shaped holes and the fixing holes can fix the adjusting disc relative to the driving hub.

[0012] When the shape of the cylinder needs to be adjusted, all the bolts can be loosened first, then the adjusting disc is rotated, and after the adjustment is completed, all the bolts are tightened again.

[0013] Further, the adjusting mechanism is installed at both ends of the cylinder to ensure the stable support of the central shaft to the cylinder.

[0014] Further, a transition angle is formed between the edges of the meshed screen surface. The transition angle is preferably an obtuse angle, so that the entire cylinder is in the shape of a polygon or a quasi-polygon, and when the classified material is tumbled therein, the classified material can intermittently be acted on by the meshed screen surface and the transition angle part to generate sufficient jumping and tumbling action, thereby improving the activity of the classified material and improving the screening efficiency.

[0015] Further, the meshed screen surface is arc-shaped, and the edges of the meshed screen surface are smoothly transitioned, all the meshed screen surfaces form an elliptical cylinder, and the adjusting mechanism can change the ellipticity of the cylinder.

[0016] Further, the number of the net-shaped screen surfaces and the rigid rods is 4; in the adjusting mechanism, the second connecting rods are connected between the adjacent rigid rod pairs corresponding to the sliding blocks; the two ends of the second connecting rods are rotationally connected relative to the sliding blocks connected thereto; and the sliding blocks are fixed relative to the guide sliding spokes. With the above structure, one pair of sliding blocks can be driven to relatively move away from each other, while the other pair of sliding blocks can be driven to move close to each other, so as to change the ellipticity of the cylinder. When the elliptical classification cylinder rotates, the distance between the cylinder wall and the central axis continuously and linearly changes, so as to promote the jumping and tumbling of the classified materials, and improve the screening efficiency.

[0017] Beneficial effects: the classification effect adjustable special-shaped classification cylinder has the following beneficial effects:

[0018] (1) When the special-shaped classification cylinder rotates, the classified materials can generate sufficient jumping and tumbling effects under the action of the corner or curved surface in the special-shaped cylinder, so as to improve the activity of the classified materials and improve the screening efficiency. Since the materials can fully tumble in the cylinder, the seeds can try to pass through the screen hole at more angles, the qualified seeds can be more effectively screened out, and the classification effect is improved.

[0019] (2) Since the rigid rods are close to or away from the central axis under the action of the adjusting mechanism, the bending degree of the net-shaped screen surface can be changed, so that the shape of the entire cylinder can be changed. When the special-shaped classification cylinder rotates around the central axis, the action of the special-shaped classification cylinder on the materials inside the special-shaped classification cylinder changes, so that the distribution state of the materials in the special-shaped classification cylinder as a whole changes, and the classification effect and the classification efficiency are adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the classification effect adjustable special-shaped classification cylinder of the first embodiment;

[0021] Figure 2 It is a front view of the classification effect adjustable special-shaped classification cylinder of the first embodiment;

[0022] Figure 3 It is a front view of the classification effect adjustable special-shaped classification cylinder of the second embodiment.

[0023] In the drawings: 1 is a central axis; 2 is a net-shaped screen surface; 3 is a rigid rod; 4 is an adjusting mechanism; 41 is a driving hub; 4d is an inner disc body; 4e is an outer ring body; 4a is a guide sliding spoke; 42 is a sliding block; 43 is an adjusting disc; 4b is an arc-shaped hole; 44 is a first connecting rod; 4c is a fixed hole; 45 is a bolt; 46 is a second connecting rod. DETAILED DESCRIPTION

[0024] The application will be further described below in combination with the drawings.

[0025] Embodiment one

[0026] As Figure 1 With Figure 2 The adjustable profiled sizing drum shown in the figure comprises a central shaft 1 and a plurality of mesh screens 2, all of which enclose a drum body arranged around the central shaft 1; the mesh screens 2 are flexible, and a rigid rod 3 is arranged between the edges of adjacent mesh screens 1; the profiled sizing drum further comprises an adjusting mechanism 4, which can act on all the rigid rods 3 to simultaneously gather all the rigid rods 3 towards the central shaft 1 or disperse them away from the central shaft 1.

[0027] In this embodiment, a transition angle is formed between the edges of the mesh screens 2. The transition angle is preferably obtuse, so that the entire drum body is in the shape of a polygon or a polygon-like shape. When the classified material is tumbled therein, it can intermittently be acted on by the mesh screens 2 and the transition angle part to produce sufficient jumping and tumbling action, thereby improving the activity of the classified material and improving the screening efficiency.

[0028] In the above structure, the rigid rods 3 are gathered and dispersed by the adjusting mechanism 4, which can change the bending degree of the mesh screens 2, so that the shape of the entire drum body can be changed. When the profiled sizing drum rotates around the central shaft 1, the action of the material in the profiled sizing drum changes, which can change the distribution state of the material in the profiled sizing drum as a whole, thereby achieving the adjustment of the sizing effect and the sizing efficiency.

[0029] The mesh screens 2 have a pre-bending radius or a pre-bending angle to facilitate deformation of the mesh screens 2 under stress, and the bending direction is a preset direction.

[0030] The adjusting mechanism 4 comprises a driving hub 41 fixedly installed relative to the central shaft 1, the driving hub 41 has a plurality of radially extending guide sliding spokes 4a, the number of the guide sliding spokes 4a is equal to and corresponds to the number of the rigid rods 3; the end of the rigid rod 3 is provided with a sliding block 42 which is in sliding fit with the corresponding guide sliding spoke 4a; the adjusting mechanism 4 further comprises a driving mechanism which can drive all the sliding blocks 42 to move together.

[0031] In this embodiment, the driving mechanism comprises an adjusting disc 43, a plurality of first connecting rods 44 are rotatably connected to the adjusting disc 43; the number of the first connecting rods 44 is equal to and corresponds to the number of the sliding blocks 42; the adjusting disc 43 can be adjusted in position relative to the driving hub 41 and can be fixed relative to the driving hub 41.

[0032] With the above structure, by changing the relative angle between the adjusting disc 43 and the drive hub 41, the adjusting disc 43 can simultaneously change the position of all sliders 42 through all the first connecting rods 44, that is, to change the position of the rigid rod 3, thereby adjusting the shape of the cylinder. The adjustment is convenient and efficient.

[0033] The adjusting disc 43 has a plurality of arc-shaped holes 4b, and the driving hub 41 has a number of fixing holes 4c equal to the number of arc-shaped holes 4b. Specifically, the driving hub 41 includes an inner disc body 4d and an outer ring body 4e, a guide spoke 4a is formed between the inner disc body 4d and the outer ring body 4e, and fixing holes 4c are formed on the inner disc body 4d. Bolts 45 passing through the arc-shaped holes 4b and the fixing holes 4c can fix the adjusting disc 43 relative to the driving hub 41.

[0034] When the shape of the cylinder needs to be adjusted, loosen all bolts 45 first, then rotate the adjusting plate 43. After the adjustment is completed, tighten all bolts 45.

[0035] Preferably, the adjustment mechanism 4 is installed at both ends of the cylinder to ensure that the central shaft 1 provides stable support for the cylinder.

[0036] Example 2

[0037] like Figure 3 The adjustable grading roller shown includes a central shaft 1 and multiple mesh screens 2, all of which enclose a cylinder surrounding the central shaft 1. The mesh screens 2 are flexible, and rigid rods 3 are provided between the edges of adjacent mesh screens 1. The grading roller also includes an adjustment mechanism 4, which can act on all the rigid rods 3 to make some of the rigid rods 3 move closer to the central shaft 1 and others move away from the central shaft 1.

[0038] The adjustment mechanism 4 includes a drive hub 41 fixedly mounted relative to the central axis 1. The drive hub 41 has a plurality of radially extending guide spokes 4a. The number of guide spokes 4a is equal to the number of rigid rods 3 and corresponds one-to-one. The end of the rigid rod 3 is equipped with a slider 42 that slides in cooperation with the corresponding guide spoke 4a. The adjustment mechanism 4 also includes a drive mechanism that can drive all the sliders 42 to move together.

[0039] In this embodiment, the mesh screen surface 2 is arc-shaped, and the edges of the mesh screen surface 2 are smoothly transitioned, and all the mesh screen surfaces 2 form an elliptical cylinder. The adjustment mechanism 4 can change the ellipticity of the cylinder.

[0040] The number of the net sieve surface 2 and the rigid rod 3 is 4; in the adjusting mechanism 4, the second connecting rod 46 is connected between the corresponding slide blocks 42 of the adjacent rigid rods 3, and all the second connecting rods 46 constitute the above-mentioned driving mechanism; the two ends of the second connecting rod 46 are respectively rotationally connected relative to the slide blocks 42 connected thereto; the slide block 42 can be fixed relative to the guide slide spoke 4a where it is located. With the above structure, one pair of slide blocks 42 can be synchronously driven to relatively move away, while the other pair of slide blocks 42 is driven to move close to each other, so as to change the ovality of the cylinder. When the elliptical classification cylinder rotates, since the distance between the cylinder wall and the central shaft 1 continuously and linearly changes, the jumping and tumbling of the classified materials can be promoted, and the screening efficiency is improved.

[0041] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A special-shaped sizing drum with adjustable classification effect, comprising a central shaft (1) and a plurality of mesh screens (2), all of which enclose a drum body arranged around the central shaft (1); characterized in that: the mesh screens (2) are flexible, and a rigid rod (3) is arranged between the edges of adjacent mesh screens (2); the special-shaped sizing drum further comprises an adjusting mechanism (4) capable of acting on all the rigid rods (3) to make all the rigid rods (3) move closer to or away from the central shaft (1) in the radial direction; the adjusting mechanism (4) comprises a driving hub (41) fixedly installed relative to the central shaft (1), the driving hub (41) has a plurality of radially extending guide sliding spokes (4a), the number of the guide sliding spokes (4a) is equal to and corresponds to the number of the rigid rods (3); the end of the rigid rod (3) is provided with a sliding block (42) in sliding fit with the corresponding guide sliding spoke (4a); during operation, the sliding block (42) is fixed relative to the corresponding guide sliding spoke (4a); the mesh screen (2) has a pre-bending radius or a pre-bending angle; a transition angle is formed between the edges of the mesh screen (2); the adjusting mechanism (4) further comprises a driving mechanism capable of driving all the sliding blocks (42) to move together; the driving mechanism comprises an adjusting disc (43) on which a plurality of first connecting rods (44) are rotatably connected; the number of the first connecting rods (44) is equal to and corresponds to the number of the sliding blocks (42); the adjusting disc (43) can be rotatably adjusted in position relative to the driving hub (41) and can be fixed relative to the driving hub (41); the adjusting disc (43) is provided with a plurality of arc-shaped holes (4b), and the driving hub (41) is provided with a number of fixing holes (4c) equal to the number of the arc-shaped holes (4b); a bolt (45) passing through the arc-shaped holes (4b) and the fixing holes (4c) can fix the adjusting disc (43) relative to the driving hub (41); the drum body is provided with the adjusting mechanism (4) at both ends. The mesh screen (2) is arc-shaped, and the edges of the mesh screen (2) are smoothly transitioned, all the mesh screens (2) form an elliptical drum body, and the adjusting mechanism (4) can change the ellipticity of the drum body. The number of the mesh screens (2) and the rigid rods (3) is 4; in the adjusting mechanism (4), the sliding blocks (42) corresponding to adjacent rigid rods (3) are connected by a second connecting rod (46); the two ends of the second connecting rod (46) are rotatably connected relative to the sliding blocks (42) connected thereto; and the sliding block (42) can be fixed relative to the guide sliding spoke (4a) where it is located. ​ ​ ​ ​ 2. The profiled classification drum with adjustable classification effect according to claim 1, characterized in that ​ 3. The profiled classification drum with adjustable classification effect according to claim 2, characterized in that ​ 4. The profiled classification drum with adjustable classification effect according to claim 3, characterized in that ​ 5. The profiled classification drum with adjustable classification effect according to claim 1, characterized in that, ​ 6. The profiled classification drum with adjustable classification effect according to claim 2, characterized in that ​ 7. The profiled classification drum with adjustable classification effect according to claim 6, characterized in that ​

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