A sampling device for residual agricultural film mulch.

Abstract

This utility model discloses a sampling device for residual agricultural film in farmland, belonging to the field of agricultural film sampling technology. It includes a fixed frame and at least two filtering units. Each filtering unit includes a filter ring and a filter disc. A linkage component is provided on the filter disc, and a rotating unit is located at the end of the fixed frame away from the filter ring. This design allows soil particles of different sizes to be gradually separated from agricultural film residue during the screening process, improving the screening accuracy and efficiency of the residue. Simultaneously, the filter disc rotates synchronously through a linkage structure, generating relative motion during screening, which helps prevent sieve clogging and improves screening efficiency. The filtering units are connected by a detachable structure, facilitating cleaning and replacement and enhancing the maintainability of the device. The overall structure is suitable for screening different types of soil and residual film, possessing strong versatility and field adaptability, thereby improving the efficiency and accuracy of agricultural film residue sampling.

Description

Technical Field

[0001] This utility model relates to the field of mulch film sampling technology, specifically to a sampling device for residual mulch film in farmland. Background Technology

[0002] With the development of agricultural modernization, plastic mulch film has been widely used in farmland cultivation due to its advantages such as heat preservation, moisture retention, weed control, and increased crop yield. However, along with the large-scale use of mulch film, the problem of mulch film residue has become increasingly serious. Because mulch film is often difficult to completely recycle after use, some residue remains in the soil. Long-term accumulation leads to soil structure deterioration, farmland degradation, and even adverse effects on crop root development and the environment. Therefore, mulch film residue pollution has become one of the important factors restricting the sustainable development of agriculture.

[0003] To understand the actual pollution situation of plastic film residue in farmland and to scientifically assess the distribution and accumulation of plastic film residue in different regions and under different farming methods, it is necessary to carry out systematic sampling of plastic film residue.

[0004] Traditional sampling methods rely primarily on manual labor, using simple tools such as shovels and sieves to sample and sort topsoil. This approach has several shortcomings:

[0005] First, manual sampling is inefficient and labor-intensive. Second, the screening methods are crude, making it difficult to effectively separate soil particles and mulch residues of different sizes, resulting in insufficient sampling data accuracy. Third, different operators have inconsistent screening standards, leading to poor data comparability. Fourth, manual methods are prone to sieve blockage during screening, requiring frequent cleaning, which further affects sampling efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a sampling device for residual agricultural film in farmland, which solves the problems of low efficiency, poor accuracy and poor repeatability in existing manual sampling techniques.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A sampling device for residual agricultural film includes a frame, and at least two filter units are provided above the frame.

[0009] The filtration unit includes a filter ring and a filter disc; the filter ring is detachably connected to the fixing frame; the filter disc is coaxially and rotatably disposed inside the filter ring; a plurality of filter holes are evenly opened on the filter disc, and the plurality of filter discs are arranged sequentially from top to bottom, and the diameter of the filter holes decreases sequentially from top to bottom.

[0010] The filter disc is provided with a linkage component, and the end of the fixing frame away from the filter ring is provided with a rotating unit;

[0011] The rotating unit is used to drive the uppermost filter disc to rotate, and synchronously drive the other filter discs to rotate through the linkage, so that the soil is filtered through the filter holes on each filter disc in turn to screen out the mulch film residue.

[0012] A further technical solution is that the linkage component includes a linkage rod coaxially disposed on the filter disc; the top of the linkage rod is provided with a linkage groove; and the bottom of the filter disc is provided with a first linkage block that can engage with the linkage groove.

[0013] A further technical solution is that the rotating unit includes a top frame detachably connected to the fixed frame; the top frame is provided with a driving component; the driving component has a rotating end; the rotating end is provided with a second linkage block; the second linkage block can engage with the linkage groove on the adjacent linkage rod to drive the linkage rod to rotate.

[0014] A further technical solution is that the filter ring is provided with a retaining ring for limiting the position; the filter ring is provided with a plurality of retaining grooves arranged in a circular array; and the bottom of the retaining ring is provided with a retaining block that engages with the retaining groove.

[0015] A further technical solution is that a support ring is coaxially provided at the bottom of the filter ring; the inner diameter of the support ring is smaller than that of the filter ring; the filter disk is coaxially disposed inside the filter ring and is supported by the support ring.

[0016] A further technical solution is that the fixing frame includes a fixing ring; the fixing ring is circumferentially provided with a plurality of fixing strips extending axially; the fixing strips are arranged parallel to each other, and each fixing strip is provided with a fixing block for connection; the fixing strips are detachably connected to the fixing ring through the fixing blocks.

[0017] A further technical solution is that the fixing strip has several limiting grooves along the height direction on the side near the filter ring; the filter ring has limiting blocks on its periphery; the filter ring is positioned by being engaged with the limiting blocks in the corresponding limiting grooves; a magnetic block is provided in the limiting groove; the limiting block and the magnetic block are magnetically connected.

[0018] A further technical solution is that the top of the fixing strip is provided with a guide groove along its length for sliding connection of the limiting block; the guide groove passes through several limiting grooves to assist in the assembly and positioning of the filter ring.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] By employing multiple filter discs arranged sequentially from top to bottom, with the pore size of each disc decreasing progressively, soil particles of different sizes are gradually separated from residual plastic film during the screening process, improving the screening accuracy and efficiency of plastic film residue. Simultaneously, the filter discs rotate synchronously via a linkage structure, generating relative motion during screening, which helps prevent pore clogging and improves screening efficiency. The detachable connection structure between each filter unit facilitates cleaning and replacement, enhancing the maintainability of the device. The overall structure is suitable for screening different types of soil and residual plastic film, exhibiting strong versatility and field adaptability, thereby improving the efficiency and accuracy of plastic film residue sampling. Attached Figure Description

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0022] Figure 1 This is a three-dimensional diagram of the sampling device of this utility model.

[0023] Figure 2 This is a three-dimensional view of the connection between the filter disc and the filter ring of this utility model.

[0024] Figure 3 This is a three-dimensional view of the connection between the support ring and the filter ring of this utility model.

[0025] Figure 4 This is a three-dimensional view of the rotating unit of this utility model.

[0026] Figure 5 This is a three-dimensional view of the fixing frame of this utility model.

[0027] Figure 6 This is a three-dimensional view of a partial structure of the fixing strip of this utility model.

[0028] Icons: 1-Fixed frame, 2-Filter ring, 3-Filter disc, 4-Linkage component, 5-Rotating unit, 6-Linkage rod, 7-First linkage block, 8-Top frame, 9-Drive component, 10-Second linkage block, 11-Blocking ring, 12-Blocking groove, 13-Supporting ring, 14-Fixed ring, 15-Fixed strip, 16-Fixed block, 17-Top groove, 18-Limiting groove, 19-Limiting block, 20-Magnetic block, 21-Guide groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] Example:

[0031] like Figures 1-6 As shown, this utility model provides a sampling device for residual agricultural film, including a fixed frame 1; at least two filter units are provided above the fixed frame 1 (three are used as an example in this embodiment); the filter unit includes a filter ring 2 and a filter disc 3; the filter ring 2 is detachably connected to the fixed frame 1; the filter disc 3 is coaxially and rotatably disposed in the filter ring 2; a plurality of filter holes are evenly opened on the filter disc 3, and the plurality of filter discs 3 are arranged sequentially from top to bottom, and the diameter of the filter holes decreases sequentially from top to bottom;

[0032] The filter disc 3 is equipped with a linkage 4; the fixed frame 1 is equipped with a rotating unit 5 at the end away from the filter ring 2; the rotating unit 5 is used to drive the uppermost filter disc 3 to rotate, and synchronously drive the other filter discs 3 to rotate through the linkage 4, so that the soil is filtered through the filter holes on each filter disc 3 in sequence to screen out the mulch film residue.

[0033] The principles and beneficial effects of the above technical solution:

[0034] By arranging multiple filter discs 3 sequentially from top to bottom with progressively smaller pore sizes, the soil sample undergoes a multi-stage filtration process, from coarse to fine sieves, as it falls. The uppermost filter disc 3 with larger pore sizes intercepts larger impurities, such as stones and large soil clumps; the middle filter disc 3 removes medium-sized impurities; and the bottommost filter disc 3 with smaller pore sizes retains the smallest residual film or fine particulate impurities.

[0035] Meanwhile, the linkage 4 keeps the multiple filter discs 3 synchronized during rotation, thus enabling dynamic and continuous sieving during sampling under rotational motion, avoiding problems such as sieve clogging or incomplete filtration caused by static accumulation. The multi-stage filtration structure combined with the linkage 4 can gradually purify and sieve residual film in the soil sample transfer path, improving sampling accuracy.

[0036] In this embodiment, the linkage 4 includes a linkage rod 6 coaxially fixed on the filter disc 3; the top of the linkage rod 6 is provided with a linkage groove; the linkage groove is hexagonal; the bottom of the filter disc 3 is fixed with a first linkage block 7 that engages with the linkage groove;

[0037] The rotating unit 5 includes a top frame 8 detachably connected to the fixed frame 1; a driving component 9 is provided on the side of the top frame 8 near the filter disc 3; the driving component 9 has a rotating end; the driving component 9 is a servo motor; a second linkage block 10 is fixed on the rotating end; the second linkage block 10 can be engaged with the linkage groove on the adjacent linkage rod 6 to drive the linkage rod 6 to rotate.

[0038] The principles and beneficial effects of the above technical solution:

[0039] The linkage rod 6 is coaxially arranged along the axial direction of each filter disc 3 and fixed on the filter disc 3. The top of the linkage rod 6 is provided with a hexagonal linkage groove, which has a clear geometric positioning capability. The first linkage block 7 of the lower filter disc 3 is inserted into the linkage groove of the linkage rod 6 of the upper filter disc 3, thus forming a mechanical linkage structure from top to bottom.

[0040] The drive unit consists of a servo motor fixed to the top frame 8, with a second linkage block 10 fixed to its rotating end. This linkage block is inserted into the hexagonal linkage slot of the linkage rod 6 of the uppermost filter disc 3, enabling the servo motor to reliably transmit power to the uppermost filter disc 3. Furthermore, relying on the linkage 4 that links the upper and lower parts, it synchronously drives the rotation of multiple filter discs 3 below. The edge structure of the hexagonal linkage slot provides excellent anti-slip performance and anti-rotational free-travel capability during force transmission, ensuring the accuracy and timeliness of power transmission.

[0041] In this embodiment, the filter ring 2 is provided with a retaining ring 11 for limiting the position; the filter ring 2 is provided with a plurality of retaining grooves 12 arranged in a circular array; the bottom of the retaining ring 11 is provided with a retaining block that engages with the retaining groove 12.

[0042] The principles and beneficial effects of the above technical solution:

[0043] The baffle ring 11 can form a surrounding structure around the filter disc 3, preventing soil from being thrown out or slipping off the side of the filter disc 3 during the screening rotation, effectively improving the stability and cleanliness of the screening process.

[0044] In this embodiment, a support ring 13 is coaxially fixed to the bottom of the filter ring 2; the inner diameter of the support ring 13 is smaller than that of the filter ring 2; the filter disc 3 is coaxially disposed inside the filter ring 2 and is supported by the support ring 13.

[0045] The principles and beneficial effects of the above technical solution:

[0046] By setting a coaxial support ring 13 with a slightly smaller inner diameter at the bottom of the filter ring 2, an effective support structure for the filter disc 3 is formed, thus providing stable axial support and precise coaxial positioning. This avoids problems such as sinking, eccentricity, or tilting of the filter disc 3 due to uneven force during the screening process. This structure improves the stability of the filter disc 3 operation and the continuity of the screening effect, ensuring that the soil is evenly distributed on the disc surface and passes smoothly through the sieve holes during rotation.

[0047] In this embodiment, the fixing frame 1 includes a fixing ring 14; the fixing ring 14 is evenly provided with a plurality of fixing strips 15 extending axially in the circumferential direction (four are used as an example in this embodiment); the fixing strips 15 are arranged parallel to each other, and each fixing strip 15 is provided with a fixing block 16 for connection; the fixing block 16 and the fixing ring 14 are respectively provided with corresponding threaded holes; the fixing strips 15 and the fixing blocks 16 are connected by passing screws through the threaded holes.

[0048] Each fixing strip 15 has a top groove 17; the top frame 8 is engaged in the corresponding top groove 17 by a sinker block.

[0049] The principles and beneficial effects of the above technical solution:

[0050] By connecting the fixing ring 14 to multiple axially arranged fixing strips 15, a stable and structurally rigid fixing frame 1 is formed, realizing multi-point support and positioning of various components of the filtration system, and enhancing the overall torsional resistance and installation stability of the device. The fixing blocks 16 are connected to the threaded holes on the fixing ring 14 using screws, ensuring a robust and reliable structure that facilitates disassembly and maintenance. The snap-fit ​​connection between the top groove 17 at the top of the fixing strip 15 and the recessed block on the top frame 8 allows for quick installation and precise positioning of the top frame 8.

[0051] The top frame 8 and the fixing ring 14 are arranged close to the upper and lower ends of the fixing strip 15, respectively, forming a closed support frame structure, which helps to enhance the axial stiffness and structural stability of the overall device. This symmetrical arrangement allows each fixing strip 15 to not only independently bear axial loads during operation, but also to achieve stress transfer and uniform distribution through the rigid frame formed by the upper and lower borders, effectively preventing structural twisting, tilting or deformation caused by lateral loads or local eccentric forces.

[0052] In this embodiment, the fixing strip 15 has several limiting grooves 18 along the height direction on the side near the filter ring 2; the filter ring 2 has limiting blocks 19 on its periphery; the filter ring 2 is positioned by being snapped into the corresponding limiting groove 18 by the limiting blocks 19; a magnetic block 20 is provided in the limiting groove 18; the limiting blocks 19 are made of metal, such as iron or steel; the limiting blocks 19 and the magnetic blocks 20 are magnetically connected to improve the stability of the filter ring 2.

[0053] The principles and beneficial effects of the above technical solution:

[0054] A limiting block 19 is provided on the periphery of the filter ring 2. The limiting block 19 can be inserted into the corresponding limiting groove 18, thereby achieving radial and vertical positioning of the filter ring 2 relative to the fixing strip 15. The spacing between two adjacent filter rings 2 can be adjusted as needed, thereby adjusting the spacing between adjacent filter discs 3. The magnetic block 20 and the limiting block 19 form a magnetic adsorption, constituting an auxiliary holding structure.

[0055] In this embodiment, the top end of the fixing strip 15 is provided with a guide groove 21 along its length for sliding connection of the limiting block 19; the guide groove 21 passes through several limiting grooves 18 and is used to assist in the assembly and positioning of the filter ring 2.

[0056] The principles and beneficial effects of the above technical solution:

[0057] The guide groove 21 is connected to multiple limiting grooves 18 on the fixing strip 15 to guide the vertical sliding of the filter ring 2 during installation. Multiple limiting blocks 19 are provided on the periphery of the filter ring 2. Each limiting block 19 can slide from top to bottom along the guide groove 21 during installation, so that it gradually approaches the position of the target limiting groove 18 in the vertical direction.

[0058] As the filter ring 2 slides down the guide groove 21, the operator can visually determine whether the limiting block 19 is aligned with the target limiting groove 18 using positioning markers. Once the limiting block 19 reaches the predetermined position in the limiting groove 18, the operator can apply a slight rotation to the filter ring 2, causing the limiting block 19 to rotate from the guide groove 21 and engage inside the limiting groove 18. At this time, because a magnetic block 20 is pre-embedded in the limiting groove 18, and the limiting block 19 is made of metal such as iron, the two generate magnetic attraction upon engagement, thereby achieving the positioning and fixation of the filter ring 2.

[0059] The guide groove 21 facilitates the assembly process of the filter ring 2, which involves guided sliding, rotational positioning, and final magnetic fixation. This enhances the intuitiveness and operational tolerance of the assembly process and significantly improves installation efficiency. The guide groove 21 provides a clear movement path for the limiting block 19, enabling precise installation of the filter ring 2 without the need for complex positioning structures. The rotary snap-fit ​​structure simplifies the fixing operation, while magnetic adsorption enhances the stability and shock resistance of the structure, ensuring that the filter ring 2 will not loosen or shift due to vibration during the screening process.

[0060] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A sampling device for residual agricultural film, characterized in that: Includes a mounting bracket (1), with at least two filter units disposed above the mounting bracket (1); The filter unit includes a filter ring (2) and a filter disc (3); the filter ring (2) is detachably connected to the fixing frame (1); the filter disc (3) is coaxially and rotatably disposed inside the filter ring (2); a plurality of filter holes are evenly opened on the filter disc (3), and the plurality of filter discs (3) are arranged sequentially from top to bottom, and the diameter of the filter holes decreases sequentially from top to bottom; The filter disc (3) is provided with a linkage (4), and the fixed frame (1) is provided with a rotating unit (5) at the end away from the filter ring (2). The rotating unit (5) is used to drive the uppermost filter disc (3) to rotate, and through the linkage (4) to drive the other filter discs (3) to rotate in sync, so that the soil is filtered through the filter holes on each filter disc (3) in sequence to screen out the mulch film residue.

2. The sampling device for residual agricultural film as described in claim 1, characterized in that: The linkage component (4) includes a linkage rod (6) coaxially disposed on the filter disc (3); the top of the linkage rod (6) is provided with a linkage groove; the bottom of the filter disc (3) is provided with a first linkage block (7) that can engage with the linkage groove.

3. The sampling device for residual agricultural film as described in claim 1, characterized in that: The rotating unit (5) includes a top frame (8) detachably connected to the fixed frame (1); the top frame (8) is provided with a driving member (9); the driving member (9) has a rotating end; the rotating end is provided with a second linkage block (10); the second linkage block (10) can be engaged with the linkage groove on the adjacent linkage rod (6) to drive the linkage rod (6) to rotate.

4. The sampling device for residual agricultural film as described in claim 1, characterized in that: The filter ring (2) is provided with a retaining ring (11) for limiting the position; the filter ring (2) is provided with a plurality of retaining grooves (12) arranged in a circular array; the bottom of the retaining ring (11) is provided with a retaining block that engages with the retaining groove (12).

5. The sampling device for residual agricultural film as described in claim 1, characterized in that: The bottom of the filter ring (2) is coaxially provided with a support ring (13); the inner diameter of the support ring (13) is smaller than that of the filter ring (2); the filter disc (3) is coaxially arranged inside the filter ring (2) and is supported by the support ring (13).

6. The sampling device for residual agricultural film as described in claim 1, characterized in that: The fixing frame (1) includes a fixing ring (14); the fixing ring (14) is evenly provided with a plurality of fixing strips (15) extending along the axial direction; the fixing strips (15) are arranged parallel to each other, and each fixing strip (15) is provided with a fixing block (16) for connection; the fixing strip (15) is detachably connected to the fixing ring (14) through the fixing block (16).

7. A sampling device for residual agricultural film as described in claim 6, characterized in that: The fixing strip (15) has several limiting grooves (18) along the height direction on the side near the filter ring (2); the filter ring (2) is provided with limiting blocks (19) on its periphery; the filter ring (2) is positioned by being snapped into the corresponding limiting groove (18) by the limiting block (19); a magnetic block (20) is provided in the limiting groove (18); the limiting block (19) and the magnetic block (20) are magnetically connected.

8. A sampling device for residual agricultural film as described in claim 7, characterized in that: The top of the fixing strip (15) is provided with a guide groove (21) for sliding connection of the limiting block (19) along its length direction; the guide groove (21) passes through several limiting grooves (18) to assist in the assembly and positioning of the filter ring (2).

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