Stretching degree detection device for full-biodegradable mulching film production

Abstract

The invention discloses a tensile strength detection device for full-biodegradable mulching film production, relates to the technical field of tensile detection, and aims to solve the technical problem that the actual tensile strength of a mulching film is difficult to reflect by current one-way stretching. Comprising a stretching mechanism, a clamping mechanism, a jacking mechanism and a driving mechanism, the clamping mechanism and the jacking mechanism are arranged on the stretching mechanism in a sliding mode, and the driving mechanism drives the clamping mechanism and the jacking mechanism to move. The clamping mechanism comprises a mounting column and a limiting sliding block which is arranged at the bottom end of the mounting column and is in sliding connection with the track groove; and the jacking mechanism comprises a pushing rod and an extending plate which are arranged on the mounting block. The device has the advantages that multidirectional synchronous stretching can be achieved, the actual field composite stress working condition can be simulated, the anti-fatigue stretching performance can be detected, jacking tension is applied in the stretching process, mulching film stretching detection data collection is comprehensive and accurate, and the practicability and accuracy of mulching film stretching detection are improved.

Description

Technical Field

[0001] This invention relates to the field of tensile testing technology, and more specifically, to a tensile testing device for the production of fully biodegradable mulch films. Background Technology

[0002] Fully biodegradable mulch film is a key innovative product in modern agriculture, embodying the concept of green development and serving as an ideal replacement for traditional plastic mulch film. Made primarily from biodegradable bio-based materials, it retains the core functions of traditional mulch film, such as heat preservation, moisture retention, and weed suppression, while addressing the root cause of plastic pollution. Its core advantage lies in its ability to decompose into carbon dioxide and water under the influence of soil microorganisms, sunlight, and temperature after its service life, leaving no plastic fragments behind. This reduces the burden of recycling for farmers and protects the farmland ecosystem. Fully biodegradable mulch film has been widely adopted in agricultural production areas across China, providing crucial support for promoting the eco-friendly transformation of agricultural production and achieving sustainable agricultural development.

[0003] Tensile strength testing is required during the production and processing of fully biodegradable mulch films. Currently, tensile strength testing of fully biodegradable mulch films involves fixing the four corners of the film and using a tension sensor to perform unidirectional tensile testing. This only obtains tensile data in a single direction. However, in actual field environments, mulch films are subjected to multi-directional and multi-angle tensile forces. Single-direction testing results cannot comprehensively reflect the actual tensile strength of the film, reducing the accuracy of the test data. Therefore, we propose a tensile strength testing device for the production of fully biodegradable mulch films. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a tensile strength testing device for the production of fully biodegradable mulch film, so as to solve the technical problem that the current unidirectional stretching is difficult to reflect the actual tensile strength of mulch film.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a tensile strength testing device for the production of fully biodegradable mulch film, comprising a tensile mechanism, a clamping mechanism and a lifting mechanism slidably disposed on the tensile mechanism, and a driving mechanism for driving the clamping mechanism and the lifting mechanism to displacement;

[0006] The stretching mechanism includes a track plate, on which track grooves are symmetrically arranged, and a support plate for supporting the mulch film is provided on the track plate;

[0007] The clamping mechanism includes a mounting column and a limiting slider whose bottom end is slidably connected to the track groove. The mounting column has an installation opening, and an installation block is rotatably installed in the installation opening. A clamping unit is provided on the front side of the installation block.

[0008] The lifting mechanism includes a push rod and an extension plate mounted on the mounting block. A pressure sensor is mounted on the extension plate, and a mounting plate is mounted on the pressure sensor. A lifting unit for lifting the mulch film is mounted on the mounting plate.

[0009] The drive mechanism includes a mounting plate, a bidirectional lead screw, and a movable block mounted on the bidirectional lead screw.

[0010] Preferably, the trajectory groove includes a first groove and a symmetrically arranged second groove. The second groove is inclined. The first and second grooves form a radial distribution of the trajectory groove. A wave section is provided in the middle of the second groove, and the wave section is composed of several adjacent arc-shaped bends.

[0011] Preferably, the mounting block has a semi-circular protrusion at its lower part, which serves as the axis of rotation. The clamping unit includes a tension sensor and a C-shaped plate mounted on the tension sensor. A clamping plate is provided inside the C-shape of the C-shaped plate. A screw threaded onto the C-shaped plate is rotatably connected to the clamping plate. An adjusting disc is provided on the screw. A protective part is provided at the bottom of the C-shaped plate, which is curved downward and backward in an arc shape.

[0012] Preferably, the lifting unit includes fixed rods arranged in an array on the mounting plate, with a lifting block at the end of each fixed rod, a spherical hole on the lifting block, and a rolling ball movably disposed within the spherical hole.

[0013] Preferably, the extension plate is bent into an arc shape several times along its long axis, and an L-shaped support portion is symmetrically arranged at the end of the extension plate, with a ball bearing at the bottom of the support portion.

[0014] Preferably, the push rod is curved downward along its long axis, and a limiting groove is provided on the push rod, with a sliding block slidably disposed in the limiting groove.

[0015] Preferably, the lifting mechanism further includes a spring assembly, which includes a fixed plate disposed on the track plate, a second telescopic rod rotatably mounted on the fixed plate, the end of the second telescopic rod being rotatably connected to a sliding block, and a spring disposed on the outer side of the second telescopic rod, the beginning and end of the spring being respectively connected to the beginning and end of the second telescopic rod.

[0016] Preferably, the mounting plates are symmetrically arranged on the bottom surface of the track plate, the bidirectional lead screw is rotatably mounted between the mounting plates, the mounting plates are provided with motors for driving the bidirectional lead screws, limit rods are symmetrically arranged between the mounting plates, limit holes are opened on the moving block, and the limit rods are located in the limit holes.

[0017] Preferably, the top surface of the movable block is connected to the bottom surface of the limiting slider located in the first groove, and a first telescopic rod is symmetrically arranged on the side end of the movable block. A connecting block is provided at the end of the first telescopic rod, and the top surface of the connecting block is connected to the bottom surface of the limiting slider located in the second groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention designs a trajectory groove structure, in which the first and second grooves are radially distributed. This structure can drive multiple clamping mechanisms to simultaneously stretch the mulch film from different directions such as straight lines and oblique directions, simulating the actual working conditions of mulch film under multi-directional tension in the field. This breaks through the detection limitations of unidirectional tension, and the obtained tension data is more in line with the actual application scenario of mulch film, improving the comprehensiveness and accuracy of the detection data, and solving the problem that current unidirectional tension is difficult to reflect the actual tensile strength of mulch film.

[0020] 2. This invention also designs a wave-shaped structure in the middle of the second tank, which is composed of multiple sets of arc-shaped bends. This allows the clamping mechanism to apply stable tensile tension to the mulch film while driving the mulch film to complete multiple bending cycles. This can simulate the repeated tensile and bending cycle stress caused by soil settlement and uneven crop growth during long-term use of the mulch film. It can detect the fatigue tensile performance of the material and accurately detect the fatigue tensile performance of the fully biodegradable mulch film to periodic composite deformation during the gradual degradation process. This fills the gap in the evaluation of fatigue performance in traditional testing and further improves the accuracy of tensile testing of biodegradable mulch film.

[0021] 3. The present invention also designs a lifting mechanism integrating a lifting unit. The rolling ball of the lifting unit can uniformly transmit the lifting force to the mulch film, while converting sliding friction into rolling friction. Based on multi-directional stretching, it applies local lifting tension to the mulch film, restoring the combined stress state of the mulch film under soil settlement and crop support in the field. This enables the detection of tensile strength under combined working conditions and further improves the accuracy of mulch film tensile testing.

[0022] 4. The present invention also designs an elastic component structure. The spring of the elastic component can steadily and continuously increase the lifting force as the stretching process progresses through its own elastic characteristics, avoiding sudden changes in force value caused by rigid lifting, ensuring the uniformity and gradualness of the lifting force application, and making the data of composite force detection more valuable for reference.

[0023] 5. The present invention also designs a C-shaped plate structure. The arc-shaped protective part at the bottom of the C-shaped plate can fit against the surface of the mulch film during the lifting operation, avoiding the cutting of the fragile and degradable mulch film by the corners of the components. At the same time, the cooperation between the clamping plate and the screw can achieve a firm and non-destructive clamping of the mulch film, ensuring that the damage to the mulch film during the testing process comes only from the tensile and lifting stress, thus ensuring the authenticity of the test results and preventing the problem of the mulch film being easily cut and damaged by the clamping components during the stretching and lifting process. Attached Figure Description

[0024] Figure 1 This is a front view structural diagram of the present invention;

[0025] Figure 2 This is a bottom-view structural diagram of the present invention;

[0026] Figure 3 This is a schematic diagram of the track board structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the drive mechanism structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the clamping mechanism and lifting mechanism of the present invention;

[0029] Figure 6 This is a schematic diagram of the elastic component structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the clamping mechanism and partial lifting mechanism of the present invention;

[0031] Figure 8 This is a schematic diagram of the mounting column structure of the present invention;

[0032] Figure 9 This is a partial front view schematic diagram of the structure of the present invention;

[0033] Figure 10 This is a schematic diagram of the partial lifting mechanism structure of the present invention;

[0034] Figure 11 This is a schematic diagram of one usage state of the present invention.

[0035] Explanation of the numbers in the diagram: 100, Tensioning mechanism; 101, Track plate; 102, Track groove; 1021, First groove; 1022, Second groove; 1023, Wave section; 103, Support plate; 200, Clamping mechanism; 201, Mounting post; 2011, Mounting port; 202, Limiting slider; 203, Mounting block; 2031, Semi-circular protrusion; 204, Tension sensor; 205, C-shaped plate; 2051, Protective part; 206, Clamping plate; 207, Screw; 208, Adjusting disc; 300, Drive mechanism; 301, Mounting... Plate; 302, Two-way lead screw; 303, Motor; 304, Limiting rod; 305, Moving block; 306, First telescopic rod; 307, Connecting block; 400, Lifting mechanism; 401, Push rod; 4011, Limiting groove; 402, Sliding block; 403, Extension plate; 404, Support part; 405, Ball bearing; 406, Pressure sensor; 407, Mounting plate; 408, Fixed rod; 409, Lifting block; 410, Rolling ball; 500, Elastic assembly; 501, Fixed plate; 502, Second telescopic rod; 503, Spring. Detailed Implementation

[0036] like Figures 1 to 11 As shown, the present invention relates to a tensile strength testing device for the production of fully biodegradable mulch film, comprising a tensile mechanism 100, a clamping mechanism 200 and a lifting mechanism 400 slidably disposed on the tensile mechanism 100, and a driving mechanism 300 for driving the clamping mechanism 200 and the lifting mechanism 400 to displacement.

[0037] The tensioning mechanism 100 includes a track plate 101, track grooves 102 are symmetrically arranged on the track plate 101, and a support plate 103 for supporting the mulch film is provided on the track plate 101.

[0038] The clamping mechanism 200 includes a mounting post 201 and a limiting slider 202 whose bottom end of the mounting post 201 is slidably connected to the track groove 102. The mounting post 201 has an installation opening 2011, and an installation block 203 is rotatably installed in the installation opening 2011. A clamping unit is provided on the front side of the installation block 203.

[0039] The lifting mechanism 400 includes a push rod 401 and an extension plate 403 mounted on the mounting block 203. A pressure sensor 406 is mounted on the extension plate 403. A mounting plate 407 is mounted on the pressure sensor 406. A lifting unit for lifting the mulch film is mounted on the mounting plate 407.

[0040] The drive mechanism 300 includes a mounting plate 301, a bidirectional lead screw 302, and a movable block 305 mounted on the bidirectional lead screw 302. This invention can apply stable tensile tension to the mulch film synchronously in multiple directions, simulating actual composite stress conditions in the field. It can also detect fatigue tensile performance. Furthermore, by applying lifting tension during the stretching process, it ensures comprehensive and accurate data collection for mulch film stretching tests, thus improving the practicality and accuracy of mulch film stretching tests.

[0041] Specifically, the trajectory groove 102 includes a first groove 1021 and a symmetrically arranged second groove 1022. The second groove 1022 is inclined. The first groove 1021 and the second groove 1022 form a radial distribution of the trajectory groove 102. A wave section 1023 is provided in the middle of the second groove 1022. The wave section 1023 is composed of several adjacent arc-shaped bends. The first groove 1021 provides a straight sliding trajectory for the corresponding limiting slider 202, enabling unidirectional stretching of the mulch film along this direction. The second groove 1022 is inclined, providing an oblique sliding trajectory for the corresponding limiting slider 202, enabling oblique stretching of the mulch film. The radial layout of the grooves 102 allows multiple clamping mechanisms 200 to stretch the mulch film from different directions, simulating the actual working conditions of the mulch film under multi-directional tension in the field, thereby obtaining more comprehensive tensile performance data. Furthermore, the front and rear sections of the second groove 1022 are straight, while the middle section is wavy. On the one hand, the straight stretching at the front and rear sections can achieve stable initial pre-tension and end limit stretching, ensuring the accuracy of the basic tensile data. On the other hand, the wavy path can simulate the repeated stretching and bending cyclic stress caused by soil settlement and uneven crop growth during long-term use of the mulch film, which can detect the fatigue tensile performance of the material, especially the tolerance of biodegradable mulch film to periodic composite deformation during the gradual degradation process, and can accurately detect the fatigue tensile performance of biodegradable mulch film under repeated deformation.

[0042] It is worth noting that the lower part of the mounting block 203 is provided with a semi-circular protrusion 2031, which is the axis of rotation. The clamping unit includes a tension sensor 204 and a C-shaped plate 205 provided on the tension sensor 204. A clamping plate 206 is provided inside the C-shape of the C-shaped plate 205. A screw 207 that is rotatably connected to the clamping plate 206 is threaded on the C-shaped plate 205. An adjusting plate 208 is provided on the screw 207. A protective part 2051 is provided at the bottom of the C-shaped plate 205. The protective part 2051 is curved downward and backward in an arc shape. The function of the tension sensor 204 is to monitor the magnitude of the tension applied to the underground membrane by the clamping unit in real time, providing accurate tension data for detecting the tensile strength of the underground membrane. The function of the C-shaped plate 205 is to provide installation space and support foundation for components such as the clamping plate 206 and the screw 207. The function of the clamping plate 206 is to cooperate with the C-shaped plate 205 under the push of the screw 207 to clamp the edge of the underground membrane and ensure the firmness of the clamping. The function of the screw 207 is to convert the rotational motion of the adjusting plate 208 into the linear motion of the clamping plate 206 through its own thread transmission, so as to adjust the clamping tightness. The function of the adjusting plate 208 is to facilitate the operator to rotate the screw 207 and reduce the difficulty of clamping operation. The function of the protective part 2051 is to fit the underground membrane with its arc shape during the lifting process of stretching, so as to prevent the corners of the C-shaped plate 205 from cutting and damaging the underground membrane.

[0043] It is worth mentioning that the lifting unit includes fixed rods 408 arrayed on the mounting plate 407. Each fixed rod 408 has a lifting block 409 at its end. The lifting block 409 has a spherical hole, within which a rolling ball 410 is movably mounted. The fixed rods 408 connect the mounting plate 407 and the lifting blocks 409, providing stable support for the lifting blocks 409 and ensuring precise installation of each lifting block 409. The lifting blocks 409 directly contact the mulch film, transmitting the lifting force to the film to achieve the lifting operation. The rolling balls 410 convert the sliding friction between the lifting blocks 409 and the mulch film into rolling friction, reducing wear on the mulch film during lifting and adapting to the displacement of the mulch film during lifting, ensuring uniformity of the lifting force transmission.

[0044] It is worth noting that the extension plate 403 is curved several times along its long axis, and an L-shaped support portion 404 is symmetrically arranged at the end of the extension plate 403. A ball bearing 405 is provided at the bottom of the support portion 404. The curved design of the extension plate 403 is intended to adapt to the overall movement trajectory of the lifting mechanism 400, avoid interference with other components, and ensure that the installation angle of the pressure sensor 406 and the lifting unit is reasonable. The support portion 404 supports the end of the extension plate 403, ensures the angle of the mounting block 203, and prevents the mounting block 203 from rotating downward. The ball bearing 405 converts the sliding friction between the support portion 404 and the contact component into rolling friction, reducing the resistance during the stretching movement.

[0045] Furthermore, the push rod 401 is curved downwards along its long axis, and a limiting groove 4011 is provided on the push rod 401. A sliding block 402 is slidably disposed within the limiting groove 4011. The curved design of the push rod 401 is intended to adapt to the pulling direction of the elastic component 500 and the movement trajectory of the lifting mechanism 400, making the force transmission smoother and avoiding spatial interference with other components. The limiting groove 4011 provides a sliding track for the sliding block 402, limiting the movement direction of the sliding block 402 and ensuring the stability of its sliding process. The sliding block 402 connects the push rod 401 and the second telescopic rod 502, transmitting the elastic force of the elastic component 500 to the push rod 401, thereby driving the lifting unit to move. It can also slide within the limiting groove 4011, adapting to the curved trajectory of the push rod 401.

[0046] Furthermore, the lifting mechanism 400 also includes an elastic component 500. The elastic component 500 includes a fixed plate 501 mounted on the track plate 101. A second telescopic rod 502 is rotatably mounted on the fixed plate 501. The end of the second telescopic rod 502 is rotatably connected to the sliding block 402. A spring 503 is provided on the outside of the second telescopic rod 502. The beginning and end of the spring 503 are respectively connected to the beginning and end of the second telescopic rod 502. The function of the spring 503 is to provide elastic driving force for the lifting mechanism 400. Through its own extension and retraction, it drives the second telescopic rod 502 to move, thereby pushing the sliding block 402 and the push rod 401, causing the mounting block 203 to rotate, and causing the lifting unit to move upward, thereby lifting the underground membrane. During the process of applying tensile tension to the underground membrane stably, the elastic force of the spring 503 can continuously increase the lifting tension on the underground membrane, ensuring the smooth application of the lifting force.

[0047] Furthermore, mounting plates 301 are symmetrically arranged on the bottom surface of track plate 101, and bidirectional lead screws 302 are rotatably mounted between the mounting plates 301. A motor 303 for driving the bidirectional lead screws 302 is mounted on the mounting plates 301. Limiting rods 304 are symmetrically arranged between the mounting plates 301, and limiting holes are formed on the moving blocks 305, with the limiting rods 304 located within these holes. The symmetrical arrangement of the mounting plates 301 on the bottom surface of track plate 101 ensures the stability of the mounting center of gravity of the drive mechanism 300, and provides a symmetrical and stable mounting base for components such as the bidirectional lead screws 302 and the motor 303. The motor 303 provides power for the rotation of the bidirectional lead screws 302 and is the power source for the drive mechanism 300. The limiting rods 304 pass through the limiting holes of the moving blocks 305 to limit the movement of the moving blocks 305, preventing them from rotating with the bidirectional lead screws 302 and ensuring that the moving blocks 305 only perform linear motion.

[0048] Furthermore, the top surface of the movable block 305 is connected to the bottom surface of the limiting slider 202 located in the first groove 1021. The side end of the movable block 305 is symmetrically provided with a first telescopic rod 306, and the end of the first telescopic rod 306 is provided with a connecting block 307. The top surface of the connecting block 307 is connected to the bottom surface of the limiting slider 202 located in the second groove 1022. The function of the movable block 305 connected to the limiting slider 202 in the first groove 1021 is to directly drive the clamping mechanism 200 at that position to slide along the first groove 1021, thereby achieving the stretching of the mulch film in the corresponding direction. The function of the first telescopic rod 306 is to connect the movable block 305 and the connecting block 307. It can be extended and retracted according to the tilt angle of the second groove 1022 and the displacement of the movable block 305 to ensure that the force can be stably transmitted to the connecting block 307. The function of the connecting block 307 is to transmit the power of the first telescopic rod 306 to the limiting slider 202 in the second groove 1022, thereby driving the clamping mechanism 200 at that position to slide along the second groove 1022, thereby achieving the effect of synchronous stretching of the mulch film in multiple directions.

[0049] Working Principle: This embodiment provides a tensile strength testing device for the production of fully biodegradable mulch film. In use, the fully biodegradable mulch film to be tested is first laid flat on the support plate 103 of the tensile mechanism 100, with the edge of the film positioned below the clamping plate 206 within the C-shaped plate 205. Then, the operator rotates the adjusting disc 208, causing the screw 207 to rotate. The screw 207, through threaded transmission, pushes the clamping plate 206 downwards, thus firmly clamping the edge of the mulch film between the clamping plate 206 and the C-shaped plate 205. Simultaneously, the tension sensor 204 is in its initial monitoring state. Next, the motor 303 in the drive mechanism 300 is started. The motor 303 drives the bidirectional lead screw 302 to rotate, and the moving block 305, limited by the limiting rod 304, moves linearly along the bidirectional lead screw 302. The moving block 305 directly drives the limiting slider 202, which is connected to it and located in the first groove 1021, to slide along the first groove 1021, thereby pulling the clamping mechanism 200 at the corresponding position to make a linear displacement. At the same time, the first telescopic rod 306 at the side end of the moving block 305 extends and retracts with the displacement of the moving block 305, and drives the limiting slider 202 located in the second groove 1022 to slide along the second groove 1022 through the connecting block 307. Since the second groove 1022 is inclined and has a wave section 1023 in the middle, the clamping mechanism 200 in this path will first be stretched obliquely in a straight line, and then repeatedly bent and stretched when passing through the wave section 1023. Combined with the straight stretching in the direction of the first groove 1021, it realizes synchronous stretching in multiple directions and under multiple working conditions. At this time, the tension sensor 204 can monitor the tension value applied to the mulch film at each clamping position in real time. While the drive mechanism 300 drives the clamping mechanism 200 to stretch, the elastic component 500 starts to work. The spring 503 on the outside of the second telescopic rod 502 on the fixed plate 501 pushes the sliding block 402, which is rotatably connected to the second telescopic rod 502, to slide along the limiting groove 4011 on the push rod 401 through its own elastic force. After the push rod 401 is subjected to force, it drives the mounting block 203 to rotate around the semi-circular protrusion 2031 as the axis. The rotation of the mounting block 203 will synchronously drive the extension plate 403 and the lifting unit on it to move. The fixed rod 408 on the mounting plate 407 in the lifting unit drives the lifting block 409 to move upward. The rolling ball 410 on the lifting block 409 and the ground The membrane contacts and evenly transfers the lifting force to the mulch film, thus achieving the lifting operation. During this process, the protective part 2051 at the bottom of the C-shaped plate 205 can prevent the corners from cutting and damaging the mulch film in subsequent operations. Secondly, the rolling ball 410 converts sliding friction into rolling friction, reducing wear on the mulch film. At the same time, the pressure sensor 406 on the extension plate 403 can monitor the pressure applied to the mulch film in real time during the lifting process. Furthermore, with the extension length, the elastic characteristics of the spring 503 can ensure that the lifting force increases steadily and continuously, so that the mulch film is stretched in multiple directions while bearing the lifting tension, simulating the combined stress state of the mulch film under multi-directional tension and local support force under actual field conditions. After the stretching and lifting operation continues until the mulch film reaches the stretch limit or the preset detection threshold,After restoring the equipment to its initial state, operators can comprehensively assess the tensile strength, fatigue tensile properties, and tensile strength under combined stress of the fully biodegradable mulch film using data collected throughout the process by tension sensor 204 and pressure sensor 406, thus completing the overall testing process.

[0050] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A tensile strength testing device for the production of fully biodegradable mulch film, characterized in that, It includes a tensioning mechanism (100), a clamping mechanism (200) and a lifting mechanism (400) slidably disposed on the tensioning mechanism (100), and a driving mechanism (300) for driving the displacement of the clamping mechanism (200) and the lifting mechanism (400). The stretching mechanism (100) includes a track plate (101), on which track grooves (102) are symmetrically arranged, and on which a support plate (103) for supporting the mulch film is arranged. The clamping mechanism (200) includes a mounting post (201) and a limiting slider (202) whose bottom end is slidably connected to the track groove (102). The mounting post (201) has an installation opening (2011), and an installation block (203) is rotatably installed in the installation opening (2011). The front side of the installation block (203) is provided with a clamping unit. The lifting mechanism (400) includes a push rod (401) and an extension plate (403) disposed on the mounting block (203). A pressure sensor (406) is disposed on the extension plate (403), and a mounting plate (407) is disposed on the pressure sensor (406). A lifting unit for lifting the mulch film is disposed on the mounting plate (407). The drive mechanism (300) includes a mounting plate (301), a two-way lead screw (302), and a moving block (305) disposed on the two-way lead screw (302).

2. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 1, characterized in that, The trajectory groove (102) includes a first groove (1021) and a symmetrically arranged second groove (1022). The second groove (1022) is inclined. The first groove (1021) and the second groove (1022) form a radial distribution of the trajectory groove (102). A wave section (1023) is provided in the middle of the second groove (1022). The wave section (1023) is composed of several adjacent arc-shaped bends.

3. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 2, characterized in that, The mounting block (203) has a semi-circular protrusion (2031) at its lower part, which is the axis of rotation. The clamping unit includes a tension sensor (204) and a C-shaped plate (205) on the tension sensor (204). A clamping plate (206) is provided inside the C-shape of the C-shaped plate (205). A screw (207) that is rotatably connected to the clamping plate (206) is threaded on the C-shaped plate (205). An adjusting plate (208) is provided on the screw (207). A protective part (2051) is provided at the bottom of the C-shaped plate (205). The protective part (2051) is curved downward and backward in an arc shape.

4. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 3, characterized in that, The lifting unit includes fixed rods (408) arranged in an array on the mounting plate (407), and a lifting block (409) is provided at the end of the fixed rod (408). A spherical hole is provided on the lifting block (409), and a rolling ball (410) is movably arranged in the spherical hole.

5. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 4, characterized in that, The extension plate (403) is bent several times along the long axis and is arranged in an arc shape. An L-shaped support part (404) is symmetrically arranged at the end of the extension plate (403), and a ball bearing (405) is arranged at the bottom end of the support part (404).

6. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 5, characterized in that, The push rod (401) is bent downward in an arc shape along its long axis. A limiting groove (4011) is provided on the push rod (401), and a sliding block (402) is slidably disposed in the limiting groove (4011).

7. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 6, characterized in that, The lifting mechanism (400) further includes a spring assembly (500), which includes a fixed plate (501) disposed on the track plate (101). A second telescopic rod (502) is rotatably mounted on the fixed plate (501). The end of the second telescopic rod (502) is rotatably connected to the sliding block (402). A spring (503) is disposed on the outside of the second telescopic rod (502). The beginning and end of the spring (503) are respectively connected to the beginning and end of the second telescopic rod (502).

8. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 7, characterized in that, The mounting plates (301) are symmetrically arranged on the bottom surface of the track plate (101). The bidirectional lead screw (302) is rotatably mounted between the mounting plates (301). The mounting plates (301) are provided with a motor (303) for driving the bidirectional lead screw (302). Limiting rods (304) are symmetrically arranged between the mounting plates (301). Limiting holes are opened on the moving block (305), and the limiting rods (304) are located in the limiting holes.

9. The tensile strength testing device for the production of fully biodegradable mulch film according to claim 8, characterized in that, The top surface of the movable block (305) is connected to the bottom surface of the limiting slider (202) located in the first groove (1021). The side end of the movable block (305) is symmetrically provided with a first telescopic rod (306). The end of the first telescopic rod (306) is provided with a connecting block (307). The top surface of the connecting block (307) is connected to the bottom surface of the limiting slider (202) located in the second groove (1022).

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