Hand-operated double-screen winnowing device for winnowing separation of straw mulching film

Abstract

Aiming at the problems of low sorting efficiency and high impurity rate during sorting of straw mulching film materials at present, the utility model provides the hand-operated double-screen sorting device for winnowing separation of the straw mulching film, the materials enter a left inclined screen and a right inclined screen which are composed of symmetrical parallelogram mechanisms after being winnowed and separated, and the left inclined screen and the right inclined screen are separated. The inclined sieve is driven by a motor to do planar motion through hand cranking (when necessary), so that straws, mulching films and excess materials are rapidly separated, and in order to adjust the blowing angle, the adjusting holes capable of adjusting the inclination angle of the inclined sieve are formed in the vertical rod of the rack so as to adapt to sorting of different materials.

Description

Technical Field

[0001] This utility model relates to the field of agricultural mechanized processing equipment technology, and in particular to a simple and easy-to-use straw and mulch film air separation hand-cranked double-screen sorting device. Background Technology

[0002] Straw-based mulch film is an environmentally friendly covering material widely used in my country's agricultural production. It is mainly used to maintain soil moisture, suppress weed growth, and regulate soil temperature, thereby promoting crop growth and increasing yield. With the development of agricultural mechanization, the recycling and reuse of straw and mulch film has become an important part of agricultural production. However, after use, straw and mulch film often mix with soil, crop residues, and other debris, making effective separation difficult and posing numerous challenges to subsequent recycling and processing. Existing straw and mulch film sorting technologies mainly rely on mechanical sorting equipment, which typically uses vibrating screens, airflow separators, or drum screens for separation. However, these traditional sorting technologies have some obvious drawbacks: First, the equipment is complex, outdated, and not simple enough, resulting in high operating costs and making it difficult to meet the needs of large-scale agricultural production. Second, the equipment has poor adaptability to materials; when the moisture content of the straw is high or the mulch film layer is thick, the sorting effect decreases significantly, leading to a high impurity content in the recycled mulch film. Therefore, a new type of straw and mulch film sorting device is urgently needed. Utility Model Content

[0003] This invention proposes a hand-cranked double-screen separation device for straw and plastic film air separation, which solves the problems of low separation efficiency and high impurity content in the existing technology for separating straw and plastic film.

[0004] The technical solution of this utility model is achieved as follows: a hand-cranked double-screening device for separating straw and plastic film through air separation, comprising:

[0005] A frame (1) is used to mount a wind shield (12), a double inclined screen (3), a fan (19), and a blower nozzle (20);

[0006] Windproof cover (12), the upper surface of which is provided with a feed inlet (6) for feeding in straw and mulch film materials to be sorted;

[0007] The blower (19) is located on the side of the frame (1) near the feed inlet (6) and is connected to the blower nozzle (20) through the air guide pipe (18) to realize the air blowing and sorting of straw and mulch film;

[0008] The blower nozzle (20) is connected to the frame (1) by bolt hinge, and the angle of the blower nozzle (20) can be adjusted by the air direction adjustment hole (11);

[0009] The double inclined screen (3) is placed at the lower and behind the blower nozzle (20) and is arranged symmetrically on the left and right. It consists of a left inclined screen (4) and a right inclined screen (5). It performs translational motion through a parallelogram mechanism to separate straw and mulch film and sort the remaining material.

[0010] One end of the left inclined screen (4) and the right inclined screen (5) are hinged together by the inclined screen drive rod (10). One side of the inclined screen drive rod (10) is hinged to the main connecting rod (7), and the other end is hinged to the frame (1) and fixedly equipped with a crank handle. The main connecting rod (7) is hinged to the frame (1).

[0011] The other two sides of the left inclined screen (4) and the right inclined screen (5) are hinged to the auxiliary connecting rod (8), which is hinged to the frame (1);

[0012] The left inclined screen (4) and the right inclined screen (5) respectively form a parallelogram planar linkage mechanism (9) with the corresponding main connecting rod (7), secondary connecting rod (8), rocker arm and frame (1);

[0013] The left inclined screen (4) and the right inclined screen (5) achieve planar synchronous motion through the corresponding main connecting rod (7) and auxiliary connecting rod (8), respectively.

[0014] As a preferred embodiment, the frame (1) has a total of twelve angle adjustment holes (13) arranged vertically on the four sets of uprights (23), with three holes in each set and symmetrically arranged in pairs in the four directions. One end of the auxiliary connecting rod (8) is hinged to one of the angle adjustment holes (13) to adjust the working angles of the left inclined screen (4) and the right inclined screen (5) respectively.

[0015] In a preferred embodiment, the inner cavity of the storage hopper (2) is divided into a film chamber (14), a straw chamber (15), and a waste material chamber (16);

[0016] The residual material chamber (16) is located directly below the double inclined screen (3), the plastic film chamber (14) is located at the end away from the blower (19), and the straw chamber (15) is located at the end close to the blower (19).

[0017] In a preferred embodiment, the wind shield (12) is fixed to the frame (1) on both sides and top of the double inclined screen (3). The wind shield (12) is made of glass or transparent acrylic material, which facilitates observation of the sorting situation inside the shield.

[0018] After adopting the above technical solution, the beneficial effects of this utility model are as follows: The straw and mulch film wind separation hand-cranked double screen separation device of this utility model, through the synchronous movement of the double inclined screen (3), combined with the wind force of the blower (19), the gravity of the straw, mulch film and the residue, and the interaction force between the straw, mulch film and / or residue, separates the straw and mulch film fed in from the feed port (6). The separated straw and mulch film fall into the storage hopper (2) below under their own gravity. At the same time, during the process of separating straw and mulch film, the double inclined screen (3) set in the frame (1) can blow out the residue in the straw and mulch film, so that it is separated from the straw and mulch film, and finally achieve the technical effect of separating straw and mulch film.

[0019] This utility model uses the main connecting rod (7) and the auxiliary connecting rod (8) to form two parallelogram planar linkage mechanisms (9) with the left inclined screen (4) and the right inclined screen (5) respectively. Under the drive of the screen surface drive shaft, these two planar linkage mechanisms (9) achieve cyclic deformation, and finally realize the reciprocating translational motion of the left inclined screen (4) and the right inclined screen (5) to achieve the purpose of sorting straw and mulch film.

[0020] The present invention has twelve vertical angle adjustment holes (13) on the frame (1), and these angle adjustment holes (13) are evenly arranged in the vertical direction. However, the distance between each angle adjustment hole (13) and the hinge hole of the main connecting rod (7) is different. Thus, the end of the auxiliary connecting rod (8) can be connected to different angle adjustment holes (13) according to different needs, thereby changing the movement position of the auxiliary connecting rod (8) and fine-tuning the vibration angle of the double inclined screen (3). Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0023] Figure 2 for Figure 1 A top-down view;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure without the windshield (12);

[0025] Figure 4 for Figure 3A frontal view diagram;

[0026] Figure 5 for Figure 3 A diagram showing the view from the right.

[0027] Figure 6 for Figure 3 A top-down view;

[0028] Figure 7 This is a schematic diagram of the structure of the double-inclined sieve (3);

[0029] Figure 8 A schematic diagram of the structure of the storage compartment (2);

[0030] In the diagram: 1-Frame; 2-Storage hopper; 3-Double inclined screen; 4-Left inclined screen; 5-Right inclined screen; 6-Feed inlet; 7-Main connecting rod; 8-Secondary connecting rod; 9-Plane connecting rod mechanism; 10-Inclined screen drive rod; 11-Wind direction adjustment hole; 12-Wind shield; 13-Angle adjustment hole; 14-Plastering room; 15-Straw room; 16-Residue room; 17-Handle; 18-Air duct; 19-Fan; 20-Air nozzle; 21-Air inlet; 22-Air outlet; 23-Upright pole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] like Figures 1-2 As shown, this is an embodiment of a hand-cranked double-screening device for separating straw and plastic film by wind separation according to the present invention, which includes a fixed frame (1). The frame (1) is a rectangular parallelepiped structure with an internal cavity for installing other functional components. Wind shields (12) are fixedly connected to the two sides and the top of the frame (1), forming a closed chamber. The two sides of the wind shield (12) can be made of transparent material (such as glass or acrylic) and fixed to the frame (1) by bolts or welding. The top of the wind shield (12) is preferably made of 45# steel and is firmly connected to the frame (1) by welding.

[0034] A fan (19) is installed on one side of the frame (1), which serves as the air inlet (21), while the opposite side of the frame (1) serves as the air outlet (22). The fan (19) is connected to the nozzle (20) on the frame (1) via a duct (18), with the diameter of the duct (18) being consistent from end to end. The front end of the nozzle (20) is circular and directly connects to the duct (18); the rear end is a rectangular outlet, which is fixed to the frame (1) with bolts and connects to the internal space of the frame (1), forming a complete air duct system. When the fan (19) is running, the airflow generated enters the interior of the frame through the nozzle (20), using wind power to separate straw, plastic film, and other impurities by gravity. Heavier straw will be blown to the left inclined screen (5), and lighter plastic film will be blown to the right inclined screen (4). The frame (1) is provided with an air direction adjustment hole (11) to adjust the airflow angle of the blower nozzle (20).

[0035] A feed inlet (6) is provided on the top of the windproof cover (12) near the air inlet (21) for feeding in the straw-mulch film mixture to be cleaned. The bundled mixture is broken up and then fed in evenly through the feed inlet (6). The size and shape of the feed inlet (6) can be adjusted according to actual needs to accommodate different types and quantities of mixed straw-mulch film materials.

[0036] On the uprights (23) on both sides of the frame (1), there are three vertically arranged angle adjustment holes (13) for the double inclined screen (3), twelve in total, arranged symmetrically in pairs. One end of each of the two auxiliary connecting rods (8) is hinged to one of the angle adjustment holes (13), and the other end of the auxiliary connecting rod (8) is hinged to the tail end of the double inclined screen (3). The purpose of setting three layers of angle adjustment holes (13) is to adjust the angle of the double inclined screen (3) to adapt to the efficient collection of straw with different moisture content, mulch film with different thickness, and different types of waste materials. The uppermost angle adjustment hole (13) can adjust the double inclined screen (2) to be horizontal. If necessary, the main connecting rod (7) and the auxiliary connecting rod (8) can be shortened at the same time to change the amplitude of the double inclined screen (3) to adapt to different working environments.

[0037] like Figures 3-6 As shown, the cleaning mechanism in this embodiment mainly includes a left inclined screen (5) and a right inclined screen (4) arranged symmetrically on the left and right sides. Both the left inclined screen (5) and the right inclined screen (4) are provided with circular screen holes. The left inclined screen (5) is used to sort straw, and the right inclined screen (4) is used to sort plastic film. The two screens are synchronized when performing the screening action, and both are translational movements. The power source is provided by hand cranking using a handle (17).

[0038] like Figure 4 and Figure 7As shown, one end of the main connecting rod (7) is hinged to the frame (1), and the other end is hinged to the head of the double inclined screen (3). It is driven by hand by the crank (17) on the inclined screen drive rod (10). If necessary, the synchronous belt can be replaced to drive it with a motor. The inclined screen drive rod (10) can ensure that the double inclined screen (3) moves synchronously and that their vibration frequencies are consistent. The inclined screen drive rod (10) works in conjunction with the main connecting rod and the auxiliary connecting rod to directly drive the left inclined screen (4). The main connecting rod, the auxiliary connecting rod, and the left inclined screen (4) form a parallelogram planar linkage mechanism (9) with the frame, which performs cyclical planar motion.

[0039] like Figure 8 The diagram shows the structure of the storage hopper (2) in this embodiment. The storage hopper (2) is a rectangular box-shaped structure located inside the frame (1) and below the double inclined screen (3). It is used to collect fallen straw, mulch film, and waste materials. The top two sides of the storage hopper (2) are inclined inward at an angle of 45° with the horizontal plane, which can maximize the collection of straw, mulch film, and waste materials, facilitating the collection of materials. The inner cavity of the storage hopper (2) is divided by steel plates into a larger waste material chamber (16) and a smaller straw chamber (15) and mulch film (14) chamber. The straw chamber (15) is located at the front, close to the fan (19), the waste material chamber (16) is located in the middle, and the mulch film chamber (14) is located at the rear, away from the fan (19). Under the force of the blower (19), the heavier straw falls onto the left inclined screen (4) closer to the blower (19), and the lighter plastic film falls onto the right inclined screen (5) farther from the blower. The straw and plastic film slide continuously into the straw chamber (15) and plastic film chamber (14) respectively after being vibrated by the double inclined screen (3), while the remaining material falls into the residue chamber (16) through the double inclined screen (3). The larger residue chamber (16) can continuously accommodate the remaining material, while the smaller straw chamber (15) and plastic film chamber (14) can be directly shoveled out and collected in time by the two sides of the frame (1).

[0040] In summary, the straw and mulch film air separation hand-cranked double-screen sorting device of this utility model has a simple structure and is easy to use. The design of the double inclined screen (3) solves the problems of low sorting efficiency and high impurity content in the existing straw and mulch film sorting technology. The design of the air direction adjustment hole (11) solves the problem of the single blowing angle of the blower (20) and the inability to adjust it. The design of the adjustable slope angle of the double inclined screen (3) enables straw with different humidity, mulch film with different thickness and different kinds of waste materials to be efficiently collected into the storage hopper (2), solving the problem of difficult separation of straw, mulch film and waste materials. It has good practicality.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hand-cranked double-screen separation device for straw and plastic film separation by air separation, characterized in that, include: The frame (1) is used to mount the wind shield (12), the double inclined screen (3), the fan (19), the blower (20), and the storage hopper (2); Windproof cover (12), the upper surface of which is provided with a feed inlet (6) for feeding in straw and mulch film materials to be sorted; The blower (19) is located on the side of the frame (1) near the feed inlet (6) and is connected to the blower nozzle (20) through the air guide pipe (18) to achieve wind-blown sorting of straw and mulch film; The blower nozzle (20) is connected to the frame (1) by bolt hinge, and the angle of the blower nozzle (20) can be adjusted by the air direction adjustment hole (11); The double inclined screen (3) is placed at the lower and behind the blower nozzle (20) and is arranged symmetrically on the left and right. It consists of a left inclined screen (4) and a right inclined screen (5). It performs translational motion through a parallelogram mechanism to separate straw and mulch film and sort the remaining material. One end of the left inclined screen (4) and the right inclined screen (5) are hinged together by the inclined screen drive rod (10). One side of the inclined screen drive rod (10) is hinged to the main connecting rod (7), and the other end is hinged to the frame (1) and fixed with a crank handle. The main connecting rod (7) is hinged to the frame (1). The other two sides of the left inclined screen (4) and the right inclined screen (5) are hinged to the auxiliary connecting rod (8), which is hinged to the frame (1); The left inclined screen (4) and the right inclined screen (5) respectively form a parallelogram planar linkage mechanism (9) with the corresponding main connecting rod (7), secondary connecting rod (8), rocker arm and frame (1). The left inclined screen (4) and the right inclined screen (5) achieve synchronous circular motion through the corresponding main connecting rod (7) and auxiliary connecting rod (8), respectively; Storage hopper (2), which is located directly below the frame (1), is used to collect sorted straw, mulch film and waste materials.

2. The straw and plastic film air separation hand-cranked double-screen sorting device as described in claim 1, characterized in that: The frame (1) has twelve angle adjustment holes (13) arranged vertically on its four sets of uprights (23). Each set has three holes, and they are symmetrical in pairs in front, back, left, and right. One end of the auxiliary connecting rod (8) is hinged to one of the angle adjustment holes (13) to adjust the working angles of the left inclined screen (4) and the right inclined screen (5) respectively.

3. The straw and plastic film air separation hand-cranked double-screen sorting device as described in claim 1, characterized in that: The inner cavity of the storage hopper (2) is divided into a film chamber (14), a straw chamber (15) and a waste material chamber (16). The residual material chamber (16) is located directly below the double inclined screen (3), the mulch film chamber (14) is located at the end away from the blower (19), and the straw chamber (15) is located at the end close to the blower (19).

4. The straw and plastic film air separation hand-cranked double-screen sorting device as described in claim 1, characterized in that: The wind shield (12) is fixed to the frame (1) on both sides and top of the double inclined screen (3). The wind shield (12) is made of glass or transparent acrylic material, which makes it easy to observe the sorting situation inside the shield.

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