A natural latex and plant fiber composite mattress degradation test device

Abstract

The present application relates to the technical field of mattress degradation test, and discloses a degradation test equipment for natural latex and plant fiber composite mattress, which comprises a kettle body and an end cover, a feeding pipeline is fixedly installed on the outer surface of the kettle body, a discharging pipeline is fixedly installed at the bottom of the kettle body, a stirring shaft body is arranged in the kettle body, a stirring frame is installed on the stirring shaft body, the stirring frame comprises a plurality of upper rod frames and lower rod frames, a guide frame is arranged below each upper rod frame and lower rod frame, and a flow guide hole is arranged on the guide frame, the degradation test equipment for the natural latex and plant fiber composite mattress can continuously lift the compost medium at the bottom of the kettle body upward, continuously guide the material at the top downward, and form forced circulation exchange in the vertical direction through the cooperation of the self-adaptable deflection guide frame arranged below the upper rod frame and the lower rod frame, the flow guide hole with complementary inclination in the upward and downward directions arranged on the guide frame, and the rotation of the stirring shaft body.

Description

Technical Field

[0001] This invention relates to the field of mattress degradation testing technology, specifically to a degradation testing device for a natural latex and plant fiber composite mattress. Background Technology

[0002] Natural latex and plant fiber composite mattresses are a new type of environmentally friendly bedding material. They are typically made by combining natural latex as a binder and elastic matrix with plant fibers such as palm fiber, coconut fiber, and bamboo fiber through processes such as foaming and vulcanization cross-linking. This type of mattress combines the high elasticity and comfort of latex with the breathability and support of plant fibers. Moreover, it is expected to return to nature through biodegradation after disposal, which is in line with the development direction of green materials. To evaluate its ultimate biodegradability in natural or composting environments, the internationally accepted method is to determine the aerobic biodegradability of the material under controlled composting conditions. For example, according to ISO14855 or GB / T19277 standards, the test material is mixed with active composting inoculum in a certain proportion, placed in a closed reaction container, and cultured at a temperature of 58±2℃ for a maximum of 180 days. The biodegradability rate is calculated by continuously measuring the cumulative amount of organic carbon converted into carbon dioxide in the material. Compost degradation testing typically employs a testing instrument equipped with a stirring device. In this process, the composite mattress is first cut into standardized small samples, thoroughly mixed with compost inoculum, and then placed into the testing device. Dry air is periodically introduced, and the carbon dioxide concentration in the exhaust is measured. To maintain the homogeneity of the compost medium, a stirring device is usually installed, running at a certain speed for a set time to attempt to agitate the material and diffuse oxygen. However, in actual testing, due to the high solid particle content in the compost medium, the exchange of matter between the upper and lower layers is relatively slow. This can easily lead to an anaerobic zone forming at the bottom of the reactor due to insufficient oxygen supply, while the top will experience a decrease in local pH due to the continuous accumulation of organic acids produced by microbial metabolism. This acidified environment inhibits the activity of most aerobic decomposition bacteria, easily causing non-intrinsic fluctuations in the degradation rate of the composite mattress sample. Furthermore, the measured cumulative carbon dioxide release is difficult to accurately reflect the material's own biodegradability. Therefore, we propose a degradation testing device for natural latex and plant fiber composite mattresses. Summary of the Invention

[0003] The purpose of this invention is to provide a degradation testing device for natural latex and plant fiber composite mattresses to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a degradation testing device for a natural latex and plant fiber composite mattress, comprising a vessel body fixedly mounted on a frame and an end cap fixedly mounted on the vessel body. A feed pipe is fixedly mounted on the outer surface of the vessel body, and a discharge pipe is fixedly mounted on the bottom of the vessel body. A stirring shaft is provided inside the vessel body, and a stirring frame is fixedly mounted on the stirring shaft. The stirring frame includes multiple upper rods and lower rods fixedly connected to the stirring shaft. The upper rods and lower rods correspond one-to-one, and a vertical rod is fixedly connected between the upper rods and lower rods. Each of the upper and lower pole frames is provided with a guide frame below it, and the guide frame is provided with a smoothed guide hole. The guide hole is set at an angle. Each of the upper and lower pole frames is fixedly installed with a detachable sleeve corresponding to the guide frame. The detachable sleeve is provided with a bowl-shaped groove inside. The top of the guide frame is fixedly installed with a connecting part, and one end of the connecting part is a spherical end that is movably connected to the bowl-shaped groove.

[0005] Preferably, each of the flow guide holes is provided with a rotating shaft inside, and a spiral blade is fixedly installed on the rotating shaft. Supports are symmetrically installed on the inner wall of the flow guide hole, and the rotating shaft is located between the supports and rotatably connected to them.

[0006] Preferably, each of the vertical rods is rotatably connected to the stirring shaft with a dispersing plate frame. An embedded frame is fixedly installed on one side of the dispersing plate frame, and multiple mounting frames are fixedly installed inside the embedded frame. Each mounting frame is provided with multiple transmission shafts rotatably connected to the inside of the embedded frame. The transmission shafts are connected to each other by a chain drive mechanism.

[0007] Preferably, a plurality of dispersing blades are installed on the other side of the dispersing plate frame and are rotatably connected to its side wall. Each dispersing blade corresponds to a transmission shaft, and one end of each dispersing blade passes through the side wall of the dispersing plate frame and is fixedly connected to the transmission shaft.

[0008] Preferably, a meshing gear is fixedly installed on one of the transmission shafts below the mounting frame, and a movable frame that is slidably connected to the inner wall of the mounting frame is installed inside the mounting frame. A sliding groove is provided at the bottom of the mounting frame, and a toothed rack is fixedly installed at the bottom of the movable frame. The toothed rack slides within the sliding groove and is in a meshing state with the meshing gear.

[0009] Preferably, a tension spring is symmetrically connected between one end of the movable frame and the inner wall of the mounting frame, and a through groove is provided at the top of the mounting frame. A movable slider is installed inside the movable frame and slidably connected to its inner wall. A magnetic shaft is installed at the top of the movable slider and is located inside the through groove. A spring body is connected between the bottom of the movable slider and the bottom inner wall of the movable frame.

[0010] Preferably, a powerful magnet is fixedly installed on the top of the mounting frame, the magnetic poles of which are opposite to those of the magnetic shaft. A telescopic shaft is installed on one side of the movable slider, and a limiting groove is provided on the inner wall of the embedded frame. The telescopic shaft is located in the limiting groove and slides along its inner wall trajectory.

[0011] Preferably, the limiting groove includes an upwardly inclined groove, a straight groove connected to one end of the upwardly inclined groove, an downwardly inclined groove connected to one end of the straight groove, a reset groove, and a slot. Multiple guide plate frames are fixedly installed inside the limiting groove, and one side of the guide plate frame is an inclined surface and the other side is a right-angled surface.

[0012] Preferably, a servo motor is fixedly installed on the top of the end cap, and the output end of the servo motor is fixedly connected to the end of the stirring shaft. A pressure plate is also fixedly installed inside the reactor body, and the lower surface of the pressure plate is in contact with the top of the fertilizer pile.

[0013] Preferably, multiple blades are fixedly installed on the surfaces of both the disassembly plate frame and the embedded frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes an adaptively deflectable guide frame located below the upper and lower rod frames, along with complementary inclined guide holes on the guide frame. Combined with the rotation of the stirring shaft, this continuously lifts the composting medium at the bottom of the vessel upwards and guides the material at the top downwards, forming a forced vertical circulation exchange. This effectively inhibits the formation of the anaerobic zone at the bottom and the acidification zone at the top, solving the problems of insufficient mixing between the upper and lower layers of composting medium and the inhibition of microbial activity in the local environment in existing testing equipment. This significantly improves the accuracy and repeatability of degradation tests. 2. This invention utilizes an embedded frame, multiple transmission shafts, a chain drive mechanism, dispersing blades, a moving frame, a gear rack, meshing gears, a tension spring, a magnetic shaft, a powerful magnet, and a limiting groove on a dispersing plate frame. During the rotation of the stirring shaft, the alternating action of centrifugal force and magnetic attraction causes the dispersing blades to rotate periodically in both directions, continuously dispersing clumps formed due to the stickiness caused by the thermo-oxidative degradation of latex. This avoids the formation of oxygen-deficient dead zones inside the material, solves the problem of uneven degradation caused by adhesion between the sample and compost particles, and ensures a true reflection of the material's degradation performance. 3. This invention uses a pressure plate fixedly installed inside the reactor body to contact the top of the compost material. By using the physical restraint effect of the pressure plate on the plant fiber sample, it effectively prevents the floating phenomenon caused by the fiber absorbing water and expanding. This ensures that the sample is always within the effective covering layer of the compost inoculum, ensuring that it is in full contact with microorganisms and maintaining the stability of the degradation environment. This solves the problem of insufficient degradation and low test results caused by the sample being exposed to the gas phase. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the vessel structure of the present invention; Figure 3 This is a schematic diagram of a partial internal structure of the vessel body of the present invention; Figure 4 This is a schematic diagram of the rotating shaft and stirring frame structure of the present invention; Figure 5 This is a schematic diagram of the guide frame and upper pole structure of the present invention; Figure 6 This is a schematic diagram of the guiding frame structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the guiding frame of the present invention; Figure 8 This is a schematic diagram of the disassembly plate frame structure of the present invention; Figure 9 This is a schematic diagram of the internal structure of the embedded frame of the present invention; Figure 10 This is a schematic diagram of the installation frame structure of the present invention; Figure 11 This is a schematic diagram of the mobile frame structure of the present invention; Figure 12 This is a schematic diagram of the limiting groove structure of the present invention.

[0016] In the diagram: 1. Frame; 2. Vessel body; 21. End cover; 22. Feed pipe; 23. Discharge pipe; 3. Stirring shaft; 4. Stirring frame; 41. Upper rod frame; 42. Lower rod frame; 43. Vertical rod frame; 5. Guide frame; 51. Flow guide hole; 52. Connecting part; 53. Rotating shaft; 54. Spiral blade; 55. Support; 6. Detachable sleeve; 61. Bowl-shaped groove; 7. Dispersing plate frame; 71. Embedded frame; 72. Mounting frame; 721. Through groove; 73. Drive shaft; 7 4. Chain drive mechanism; 75. Dispersing blade; 76. Meshing gear; 77. Moving frame; 78. Slide groove; 79. Gear rack; 70. Tension spring; 701. Blade; 8. Moving slider; 81. Magnetic shaft; 82. Spring body; 83. Telescopic shaft; 84. Limiting groove; 85. Inclined upward groove; 86. Straight groove; 87. Inclined downward groove; 88. Reset groove; 89. Slotting; 80. Guide plate frame; 9. Powerful magnet; 10. Servo motor; 11. Pressure plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-12 This invention provides a technical solution: a degradation testing device for a natural latex and plant fiber composite mattress, comprising a vessel 2 fixedly mounted on a frame 1, an end cap 21 mounted on the top of the vessel 2, and a detachable sealed connection between the end cap 21 and the vessel 2 via bolts; a feed pipe 22 for adding compost inoculum and samples is fixedly mounted on the outer surface of the vessel 2, a discharge pipe 23 for discharging waste compost is fixedly mounted on the bottom of the vessel 2, and multiple sampling pipes are also installed on the outer wall of the vessel 2; a servo motor 10 is fixedly mounted on the top of the end cap 21; a stirring shaft 3 is vertically arranged inside the vessel 2; the output end of the servo motor 10 passes through the end cap 21 and is fixedly connected to the upper end of the stirring shaft 3, thereby driving the stirring shaft 3 to rotate around its own axis; the other end of the stirring shaft 3 can be rotatably connected to the inner wall of the bottom of the vessel 2. Combined with appendix Figure 2 -Appendix Figure 7As shown; a stirring frame 4 is fixedly installed on the stirring shaft 3. The stirring frame 4 includes multiple upper rods 41 and multiple lower rods 42. The number of upper rods 41 and lower rods 42 is equal and they correspond one-to-one. A vertical rod 43 is fixedly connected between each upper rod 41 and its corresponding lower rod 42. The upper rods 41 and lower rods 42 are distributed in a ring at equal angles on the outer periphery of the stirring shaft 3. For example, in this embodiment, three upper rods 41 and three lower rods 42 are provided, and the included angle between adjacent rods is 120°. For ease of description, ... The three upper pole supports 41 are referred to as the first upper pole support 41, the second upper pole support 41, and the third upper pole support 41, respectively, and the three lower pole supports 42 are referred to as the first lower pole support 42, the second lower pole support 42, and the third lower pole support 42, respectively. The first upper pole support 41 and the first lower pole support 42 are vertically aligned, and so on. A guide frame 5 is provided below each upper pole support 41 and below each lower pole support 42. However, the radial positions of the guide frames 5 between the upper pole supports 41 and the lower pole supports 42 differ in this invention. (See attached diagram.) Figure 4 and attached Figure 5 As shown, the guide frame 5 below the first upper rod 41 or lower rod 42 is close to the stirring shaft 3, the guide frame 5 below the second upper rod 41 or lower rod 42 is located in the middle area between the inner wall of the vessel body 2 and the stirring shaft 3, and the guide frame 5 below the third upper rod 41 or lower rod 42 is close to the inner wall of the vessel body 2; thus, when the stirring shaft 3 rotates, the guide frames 5 at different radial positions can disturb and guide different radius areas of the composting medium respectively, so as to achieve uniform mixing of the entire cross section.

[0019] Combined with appendix Figure 6 As shown, each guide frame 5 has a smoothed guide hole 51 that runs through the entire guide frame 5 at an incline. Each upper rod 41 and lower rod 42 is also fixedly installed with a detachable sleeve 6 corresponding to the guide frame 5. The detachable sleeve 6 has a bowl-shaped groove 61 machined inside. Each guide frame 5 has a connecting part 52 fixedly installed on its top. The upper end of the connecting part 52 is machined into a spherical end, which is embedded in the corresponding bowl-shaped groove 61 and movably connected to it. Since the spherical end and the bowl-shaped groove 61 form a connection similar to a ball joint, when the guide frame 5 rotates with the stirring shaft 3, it can generate an adaptive deflection in any direction around the connection when subjected to the fluid resistance, centrifugal force and particle impact force of the composting medium. This adaptive deflection capability allows the guide frame 5 to automatically adjust its posture according to the material flow state, reduce local resistance, and improve material throughput efficiency. The inclination direction of the guide hole 51 varies depending on the vertical position of the guide frame 5, combined with the attached... Figure 4As shown, the servo motor 10 drives the stirring shaft 3 to rotate counterclockwise. For the guide frame 5 on the lower rod frame 42, the feed end of its guide hole 51 is located below the discharge end, that is, the guide hole 51 is inclined from bottom to top. During the rotation, the composting medium near the bottom of the vessel 2 is scooped in from the feed end, guided by the guide hole 51 and sent out from the discharge end, thereby realizing the lifting of the bottom material to the top. For the guide frame 5 on the upper rod frame 41, the feed end of its guide hole 51 is located above the discharge end, that is, the guide hole 51 is inclined from top to bottom, thereby guiding the material near the top of the compost to the bottom. Through this complementary tilting design, combined with the rotation of the stirring shaft 3, the composting medium can be continuously circulated and exchanged in the vertical direction, effectively inhibiting the formation of the bottom anaerobic zone and the top acidification zone.

[0020] Combined with appendix Figure 7 As shown, to further reduce the risk of the flow guide holes 51 being blocked by compost particles, each flow guide hole 51 is equipped with a rotating shaft 53, on which a spiral blade 54 is fixedly installed. Two supports 55 are symmetrically installed on the inner wall of the flow guide hole 51. The two ends of the rotating shaft 53 are respectively placed between the two supports 55 and rotatably connected to the supports 55. A rolling bearing (not shown in the figure) is also installed between the rotating shaft 53 and the supports 55. The bearing connection can significantly reduce the frictional resistance when the rotating shaft 53 rotates, making the rotating shaft 53 rotate more flexibly. When compost particles pass through the flow guide hole 51, the particles exert an impact force on the spiral blade 54, forcing the rotating shaft 53 and the spiral blade 54 to rotate freely within the supports 55. The rotation of the spiral blade 54 can push away particles that may stick or get stuck, thereby effectively preventing the holes from being blocked and ensuring the smooth flow of materials.

[0021] In actual operation, natural latex is prone to thermo-oxidative degradation under high temperature and high humidity conditions, leading to stickiness in the vulcanized cross-linked latex layer. This stickiness causes adhesion between the sample and adjacent samples, as well as between the sample and compost particles, creating an oxygen-deficient dead zone. Based on this, the following design is implemented in this application: Each vertical rod 43 is rotatably connected to the stirring shaft 3 with a dispersing plate 7, which can swing around the horizontal axis within a certain angle to adapt to different working conditions; an embedded frame 71 is fixedly connected to one side of the dispersing plate 7, and multiple mounting frames 72 are fixedly installed inside the embedded frame 71. Multiple drive shafts 73 are provided below each mounting frame 72, and the drive shafts 73 are rotatably connected to the inner wall of the embedded frame 71. The corresponding drive shafts 73 are connected by a chain drive mechanism 74, enabling them to rotate synchronously. Multiple dispersing blades 75 are installed on the other side of the dispersing plate frame 7, each corresponding to a drive shaft 73. One end of each blade 75 passes through the side wall of the dispersing plate frame 7 and is fixedly connected to the end of the corresponding drive shaft 73. When the drive shaft 73 rotates, the blades 75 rotate accordingly, thus mechanically dispersing the clumps formed in the composting medium due to the stickiness of the latex. Furthermore, multiple blades 701 are fixedly installed on the surfaces of the dispersing plate frame 7 and the embedded frame 71. These blades 701 can further cut and tear large clumps of material as they move with the mixing frame 4, enhancing the dispersing effect.

[0022] Furthermore, a meshing gear 76 is fixedly installed on one of the drive shafts 73. A movable frame 77 is provided inside the corresponding mounting frame 72. The movable frame 77 is slidably connected to the inner wall of the mounting frame 72 and can reciprocate along the length of the mounting frame 72. A groove 78 is provided at the bottom of the mounting frame 72. A toothed rack 79 is fixedly installed at the bottom of the movable frame 77. The toothed rack 79 passes through the groove 78 and is meshed with the meshing gear 76. A tension spring 70 is symmetrically connected between one end of the movable frame 77 and the inner wall of the mounting frame 72, and the tension spring 70 provides a return force for the movable frame 77. A through groove 721 is provided at the top of the mounting frame 72. A movable slider 8 is provided inside the movable frame 77. The movable slider 8 is slidably connected to the inner wall of the movable frame 77 and can reciprocate along the length of the mounting frame 72. The slider 8 moves up and down. A magnetic shaft 81 is fixedly installed on the top of the slider 8. The magnetic shaft 81 is located in the through groove 721. A spring body 82 is connected between the bottom of the slider 8 and the bottom inner wall of the moving frame 77. A strong magnet 9 is fixedly installed on the top of the mounting frame 72. The strong magnet 9 is located on one side of the mounting frame 72, while the tension spring 70 is installed on the other side. The magnetic poles of the strong magnet 9 and the magnetic shaft 81 are opposite, that is, there is a magnetic force that attracts each other between them. A telescopic shaft 83 is also fixedly installed on one side of the slider 8. The telescopic shaft 83 extends horizontally outward. Correspondingly, a limiting groove 84 is provided on the inner wall of the embedded frame 71. The end of the telescopic shaft 83 is located inside the limiting groove 84 and can slide along the inner wall trajectory of the limiting groove 84.

[0023] Combined with appendix Figure 12As shown, the limiting groove 84 includes an upwardly inclined groove 85, a straight groove 86, a downwardly inclined groove 87, a reset groove 88, and a slot 89. The lowest end of the upwardly inclined groove 85 serves as the initial position for the telescopic shaft 83 to move. The upwardly inclined groove 85 extends obliquely upward from its lowest end to connect with one end of the straight groove 86. The straight groove 86 extends horizontally, and its other end connects with the upper end of the downwardly inclined groove 87. The downwardly inclined groove 87 extends obliquely downward from top to bottom, and its lower end connects with one end of the reset groove 88. The reset groove 88 connects with the straight groove 86 through the slot 89. Multiple guide plate frames 80 are fixedly installed inside the limiting groove 84, each guide plate... One side of the guide plate frame 80 is an inclined surface, and the other side is a right-angled surface. Specifically, the first guide plate frame 80 is installed at the intersection of the slot 89 and the straight groove 86, with its side facing the slot 89 being an inclined surface and its side facing the straight groove 86 being a right-angled surface; the second guide plate frame 80 is installed at the intersection of the inclined upward groove 85 and the reset groove 88, with its side facing the inclined upward groove 85 being a right-angled surface and its side facing the reset groove 88 being an inclined surface; the third guide plate frame 80 is installed inside the inclined downward groove 87 and near one end of the reset groove 88, with its side facing the reset groove 88 being a right-angled surface and its side facing the straight groove 86 being an inclined surface. Furthermore, the slot 89 is located near... The inner wall of the inclined upward groove 85 is configured as an inclined guide surface. Therefore, when the stirring shaft 3 is stationary, if the tension spring 70 is in a stretched state and the spring body 82 is in a compressed state, then when the tension spring 70 pulls the moving frame 77 to reset, the telescopic shaft 83, during its movement along the trajectory of the reset groove 88, will pass through the slot 89. In this invention, the elastic coefficient of the tension spring 70 is much greater than that of the spring body 82. When passing through the slot 89, the compressed spring body 82 will cause the moving slider 8 to rise. Since the inner wall of the slot 89 near the inclined upward groove 85 is configured as an inclined guide surface, the tension spring 70, when pulling the moving frame 77... During the reset process, the telescopic shaft 83 can move along the inclined guide surface of the slot 89 and eventually reach the lowest end of the inclined upward slot 85. The side wall of the inclined downward slot 87, which is close to the reset slot 88, is also set as an inclined surface on the side facing the inclined upward slot 85. When the telescopic shaft 83 passes the guide panel of the inclined downward slot 87, the telescopic shaft 83 is about to move into the reciprocating slot. The magnetic shaft 81 will descend into the through slot 721 and be less attracted by the strong magnet 9. The tension spring 70 is stretched to its maximum extent. Under the action of the tension spring 70, the telescopic shaft 83 can perform a reset movement along the inclined surface.

[0024] To further explain, when the stirring shaft 3 is stationary, the end of the telescopic shaft 83 is located at the lowest end of the inclined upward groove 85. At this time, the tension spring 70 is in a naturally extended state without additional tension, while the spring body 82 is in a compressed state. When the servo motor 10 starts and the stirring shaft 3 begins to rotate and reaches a stable speed, under the action of centrifugal force, this centrifugal force overcomes the tension of the tension spring 70, forcing the telescopic shaft 83 to climb upward along the inclined upward groove 85 until it reaches the position of the first guide plate frame 80 at the intersection of the slot 89 and the straight groove 86. At this time, the telescopic shaft 83 contacts the right-angle surface of the guide plate frame 80. During the process of the telescopic shaft 83 moving from the bottom of the inclined upward groove 85 to the straight groove 86... In the middle, the magnetic shaft 81 gradually moves upward with the moving slider 8, and the spring body 82 gradually releases the compression. When the telescopic shaft 83 is fully inserted into the straight groove 86, the magnetic shaft 81 rises to the highest position. The magnetic shaft 81 is located on one side of the strong magnet 9. The strong magnet 9 exerts a strong attraction on the magnetic shaft 81. Under the action of this magnetic attraction, the moving slider 8 drives the moving frame 77 to move towards the strong magnet 9. The tension spring 70 is stretched. At the same time, the toothed row 79 at the bottom of the moving frame 77 drives the meshing gear 76 to rotate. Then, through the chain transmission mechanism 74, all the transmission shafts 73 and the dispersing blades 75 rotate synchronously. During the rotation, the dispersing blades 75 continuously disperse the latex clumps in the compost medium. As the telescopic shaft 83 continues to move to its end within the straight groove 86, it enters the downward-sloping groove 87. Within the downward-sloping groove 87, due to the downward slope of the groove and the continued magnetic attraction of the strong magnet 9, the magnetic shaft 81 continues to move along the trajectory of the downward-sloping groove 87. During this process, the spring body 82 is gradually compressed. When the telescopic shaft 83 passes the guide panel of the downward-sloping groove 87, it is about to move into the reciprocating groove, and the magnetic shaft 81... It will then descend into the channel 721, where only the top is subjected to the magnetic attraction of the strong magnet 9. The magnetic force is relatively small, while the tension spring 70 is stretched to its maximum extent. In this state, the tension of the tension spring 70 is greater than the magnetic attraction of the strong magnet 9 on the magnetic shaft 81 and the centrifugal force. That is, the moving frame 77 begins to move in the opposite direction, the toothed row 79 drives the meshing gear 76 in the opposite direction, and the dispersing blade 75 rotates in the opposite direction. The reverse rotation also has a dispersing effect and can prevent the material from tangling. Since the stirring shaft 3 is still moving in the opposite direction at this time... As the stirring shaft 3 rotates, the tension spring 70 gradually decreases in elasticity during the reset process, eventually balancing with the centrifugal force. Once balanced, the telescopic shaft 83 is positioned corresponding to the slot 89. Under the action of the compressed spring body 82, the moving slider 8 drives the magnetic shaft 81 upwards, causing the telescopic shaft 83 to rise and enter the straight groove 86 via the inclined surface of the guide panel. There, it is again attracted by the strong magnet 9, entering the next cycle. Thus, as long as the stirring shaft 3 continues to rotate, the telescopic shaft... The 83 will cycle between the straight trough 86, the downward tilting trough 87, the reset trough 88, and the slotted 89, driving the dispersing blades 75 to alternately rotate forward and backward, continuously breaking up clumps. When the servo motor 10 stops and the stirring shaft 3 stops rotating, the centrifugal force disappears, and the tension spring 70 pulls the telescopic shaft 83 back into the reset trough 88, and returns to the initial position at the lowest end of the upward tilting trough 85 through the inclined surface of the second guide plate frame 80. At the same time, the spring body 82 returns to the compressed state, and the dispersing blades 75 stop rotating.

[0025] To address the issue of plant fibers absorbing water and swelling and floating in the composite mattress sample, a pressure plate 11 is fixedly installed inside the reactor body 2. The lower surface of the pressure plate 11 is in contact with the top surface of the compost pile. The pressure plate 11 has multiple through holes to ensure gas exchange and water penetration. The pressure plate 11 is fixed to the inner wall of the reactor body 2 and will not rotate with the stirring shaft 3. When the plant fibers tend to float upward due to water absorption and swelling, the pressure plate 11 restricts the upward movement of the sample from above, forcing the sample to always remain under the covering layer of the compost inoculum, ensuring that it has sufficient contact with microorganisms and avoiding incomplete degradation due to exposure to air.

[0026] When this equipment is in operation, the active compost inoculum is first loaded into the reactor body 2 through the feed pipe 22, with the loading amount occupying about two-thirds of the reactor body 2 volume. Then, a standardized sample of natural latex and plant fiber composite mattress is buried in the middle layer of the compost. The end cover 21 is then placed on top and the bolts are tightened to seal it. The servo motor 10 is started, and the stirring shaft 3 rotates intermittently at the set speed. During the rotation, the guide frames 5 on the upper rod 41 and the lower rod 42 realize the vertical circulation and exchange of compost media through their respective guide holes 51. The guide frames 5 can adaptively deflect under the action of the spherical end and the bowl-shaped groove 61 of the connecting part 52, improving the material throughput efficiency. The spiral blades 54 in the guide holes 51 rotate under the push of the particles to prevent blockage. Meanwhile, the dispersing blades 75 on the dispersing plate 7 can periodically rotate in both directions to break up the clumps formed by the sticky latex. The pressure plate 11 always presses down on the compost surface to prevent the plant fibers from floating. According to the preset sampling time points (such as the 7th, 14th, 28th, 45th, 90th, and 180th days), a stirring and dispersing operation is performed before sampling to make the compost medium evenly mixed. Then, samples are taken from multiple points and different depths through the sampling pipe, and the mixture is used as a representative sample for analysis. Thus, through the structural design of this invention, the problems of insufficient exchange of compost medium, material clumping, and sample floating in the prior art can be effectively solved, significantly improving the accuracy and repeatability of the degradation test of natural latex and plant fiber composite mattresses.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A degradation testing device for a natural latex and plant fiber composite mattress, characterized in that, The vessel includes a vessel body (2) fixedly mounted on a frame (1) and an end cap (21) fixedly mounted on the vessel body (2). A feed pipe (22) is fixedly mounted on the outer surface of the vessel body (2), and a discharge pipe (23) is fixedly mounted on the bottom of the vessel body (2). A stirring shaft (3) is provided inside the vessel body (2), and a stirring frame (4) is fixedly mounted on the stirring shaft (3). The stirring frame (4) includes multiple upper rods (41) and lower rods (42) fixedly connected to the stirring shaft (3). The upper rods (41) and lower rods (42) correspond one-to-one, and a vertical rod (43) is fixedly connected between the upper rods (41) and the lower rods (42). Each of the upper pole frame (41) and lower pole frame (42) is provided with a guide frame (5) below it, and a smoothed guide hole (51) is provided on the guide frame (5). The guide hole (51) is inclined. Each of the upper pole frame (41) and lower pole frame (42) is fixedly installed with a detachable sleeve (6) corresponding to the guide frame (5). The detachable sleeve (6) is provided with a bowl-shaped groove (61) inside. A connecting part (52) is fixedly installed on the top of the guide frame (5), and one end of the connecting part (52) is a spherical end and is movably connected to the bowl-shaped groove (61).

2. The degradation testing equipment for a natural latex and plant fiber composite mattress according to claim 1, characterized in that: Each of the flow guide holes (51) is provided with a rotating shaft (53), and a spiral blade (54) is fixedly installed on the rotating shaft (53). Supports (55) are symmetrically installed on the inner wall of the flow guide hole (51), and the rotating shaft (53) is located between the supports (55) and rotatably connected to them.

3. The degradation testing equipment for a natural latex and plant fiber composite mattress according to claim 1, characterized in that: Each of the vertical rods (43) is rotatably connected to the stirring shaft (3) with a dispersing plate frame (7). An embedded frame (71) is fixedly installed on one side of the dispersing plate frame (7), and multiple mounting frames (72) are fixedly installed inside the embedded frame (71). Multiple transmission shafts (73) that are rotatably connected to the inside of the embedded frame (71) are provided below each mounting frame (72). The transmission shafts (73) are connected to each other through a chain transmission mechanism (74).

4. The degradation testing device for a natural latex and plant fiber composite mattress according to claim 3, characterized in that: On the other side of the disintegration plate frame (7), there are multiple disintegration blades (75) that are rotatably connected to its side wall. The disintegration blades (75) correspond one-to-one with the transmission shaft (73), and one end of the disintegration blades (75) penetrates the side wall of the disintegration plate frame (7) and is fixedly connected to the transmission shaft (73).

5. The degradation testing device for a natural latex and plant fiber composite mattress according to claim 4, characterized in that: A meshing gear (76) is fixedly installed on one of the transmission shafts (73) below the mounting frame (72), and a movable frame (77) is installed inside the mounting frame (72) and slidably connected to its inner wall. A sliding groove (78) is provided at the bottom of the mounting frame (72), and a toothed rack (79) is fixedly installed at the bottom of the movable frame (77). The toothed rack (79) slides within the sliding groove (78) and is in a meshing state with the meshing gear (76).

6. The degradation testing equipment for a natural latex and plant fiber composite mattress according to claim 5, characterized in that: One end of the movable frame (77) is symmetrically connected to the inner wall of the mounting frame (72) with a tension spring (70), and a through groove (721) is provided on the top of the mounting frame (72). A movable slider (8) is installed inside the movable frame (77) and slidably connected to its inner wall. A magnetic shaft (81) is installed on the top of the movable slider (8). The magnetic shaft (81) is located inside the through groove (721). A spring body (82) is connected between the bottom of the movable slider (8) and the bottom inner wall of the movable frame (77).

7. The degradation testing device for a natural latex and plant fiber composite mattress according to claim 6, characterized in that: A powerful magnet (9) is fixedly installed on the top of the mounting frame (72). The magnetic poles of the powerful magnet (9) are opposite to those of the magnetic shaft (81). A telescopic shaft (83) is installed on one side of the movable slider (8). A limiting groove (84) is provided on the inner wall of the embedded frame (71). The telescopic shaft (83) is located in the limiting groove (84) and slides along its inner wall trajectory.

8. The degradation testing device for a natural latex and plant fiber composite mattress according to claim 7, characterized in that: The limiting groove (84) includes an upward inclined groove (85), a straight groove (86) connected to one end of the upward inclined groove (85), an downward inclined groove (87) connected to one end of the straight groove (86), a reset groove (88), and a slot (89). Multiple guide plate frames (80) are fixedly installed inside the limiting groove (84), and one side of the guide plate frame (80) is an inclined surface and the other side is a right angle surface.

9. The degradation testing equipment for a natural latex and plant fiber composite mattress according to claim 1, characterized in that: A servo motor (10) is fixedly installed on the top of the end cap (21), and the output end of the servo motor (10) is fixedly connected to the end of the stirring shaft (3). A pressure plate (11) is also fixedly installed inside the vessel body (2), and the lower surface of the pressure plate (11) is in contact with the top of the fertilizer pile.

10. The degradation testing device for a natural latex and plant fiber composite mattress according to claim 4, characterized in that: Multiple blades (701) are fixedly installed on the surfaces of the disassembly plate frame (7) and the embedded frame (71).

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