Portable device for testing permeability coefficient of high-activity plant-growing capsule material

Abstract

The utility model discloses a portable device for testing the permeability coefficient of a high-activity plant-growing capsule material, and relates to the technical field of permeability testing. The water supply set comprises a water tank, a flow control valve and a water pipe, and the flow control valve is fixedly installed on the inner wall of the water tank and communicated with the water pipe; the measuring set comprises an outer cylinder, an inner cylinder, a filter screen, a connecting steel plate, a digital water level sensor and a flexible sealing washer, the outer cylinder and the inner cylinder are fixed through the connecting steel plate, the digital water level sensor is installed on the inner wall of the inner cylinder, the water pipe is communicated with the interior of the outer cylinder, and the filter screen is fixedly installed between the top of the outer cylinder and the top of the inner cylinder; the flexible sealing washer can be placed at the bottom of the inner cylinder and attached to the inner wall of the inner cylinder. And the handheld grip is hinged to the outer wall of the outer cylinder. The portable measuring device can effectively solve the problem that a traditional measuring mode is inconvenient to operate in the field, time is saved for a user, the permeability coefficient of a material can be rapidly measured, and reference is provided for follow-up engineering operation.

Description

Technical Field

[0001] This utility model belongs to the field of permeability testing, specifically, it relates to a portable device for testing the permeability coefficient of highly active plant capsule materials. Background Technology

[0002] Soil permeability coefficient is an indicator of soil's water permeability and is one of its mechanical properties, affecting its strength and deformation. In engineering applications such as earth-rock dams and bank slope protection, the determination of permeability coefficient is crucial to slope stability and the proper water storage and operation of dams. Highly active plant-based capsule materials, as a novel ecological composite material, possess excellent water absorption, release, and retention properties, promoting vegetation growth and enhancing the erosion resistance of bank slopes.

[0003] Therefore, accurate determination of its permeability coefficient is of great significance. Currently, there are two main methods for determining permeability coefficient: the constant head method and the variable head method. Most commercially available measuring devices are evolutions of these two methods. However, such devices often require indoor testing for accurate measurement, making them inconvenient for rapid field operation. Methods that can be performed in the field, such as water injection tests and water level recovery methods, face challenges due to high testing costs and complex equipment, making them inconvenient to operate. Therefore, existing technologies for testing the permeability coefficient of highly active plant-based capsule materials suffer from poor device portability and low adaptability. There is an urgent need for a portable device that can adapt to the characteristics of this material and facilitate rapid field testing.

[0004] This application proposes a portable field permeability coefficient measurement device that is quick to carry and has high accuracy, based on the double-ring infiltration method. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a portable device for testing the permeability coefficient of highly active plant capsule materials, thus solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A portable device for testing the permeability coefficient of highly active plant-based capsule materials includes: a water supply unit comprising a water tank, a flow control valve, and a water pipe, wherein the flow control valve is fixedly installed on the inner wall of the water tank and connected to the water pipe; a measurement unit comprising an outer cylinder, an inner cylinder, a filter screen, a connecting steel plate, a digital water level sensor, and a flexible sealing gasket, wherein the outer cylinder and the inner cylinder are fixed together by the connecting steel plate, the digital water level sensor is installed on the inner wall of the inner cylinder, the water pipe is connected to the inner wall of the outer cylinder, a filter screen is fixedly installed between the top of the outer cylinder and the top of the inner cylinder, and the flexible sealing gasket can be placed at the bottom of the inner cylinder and fits against the inner wall of the inner cylinder; and a hand grip hinged to the outer wall of the outer cylinder.

[0008] Optionally, a telescopic tripod is hinged to the outer wall of the outer cylinder.

[0009] Optionally, a rubber triangular block is fixedly installed at the end of the telescopic tripod that contacts the ground.

[0010] Optionally, support blocks are fixed to both the inner wall of the outer cylinder and the outer wall of the inner cylinder, and the filter screen is embedded between the outer cylinder and the inner cylinder and can be placed on the support blocks.

[0011] Optionally, the bottom of the filter screen has a notch that fits the support block.

[0012] Optionally, after the filter screen is placed on the support block, the top of the filter screen is horizontally parallel to the top of the inner cylinder.

[0013] Optionally, the radius of the inner cylinder is ≤10cm and the radius of the outer cylinder is ≤20cm.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] By improving the double-ring infiltration method, a portable design device was proposed to realize the rapid on-site testing of the permeability coefficient of highly active plant capsule materials. No complicated equipment is required in the field test, which greatly reduces the measurement time.

[0016] By setting up a digital water level sensor, it can be linked with an intelligent data acquisition module to automatically record the water level drop process, avoiding the errors of traditional manual recording and providing necessary assurance for the accuracy of permeability coefficient measurement.

[0017] The device can also be used independently without the need for material sampling. It can be used to test highly active plant capsule materials directly in the field, avoiding material structure damage and data deviation caused by sampling, thus achieving true portability.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure;

[0021] Figure 2 This is a schematic diagram of the water tank structure;

[0022] Figure 3 This is a schematic diagram of the filter structure;

[0023] Figure 4 This is a schematic diagram of the internal structure of the outer and inner cylinders;

[0024] Figure 5 This is a top view schematic diagram of the outer cylinder and its structure.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Water tank; 2. Flow control valve; 3. Water pipe; 4. Outer cylinder; 5. Inner cylinder; 6. Filter screen; 7. Connecting steel plate; 8. Digital water level sensor; 9. Flexible sealing gasket; 10. Hand grip; 11. Telescopic tripod; 12. Rubber triangular block; 13. Support block; 14. Notch.

[0027] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] In dam design, the permeability coefficient is a key parameter. By measuring the permeability coefficient, we can design reasonable anti-seepage measures for the dam foundation, such as using curtain grouting to reduce the permeability of the dam foundation soil and ensure the safe operation of the dam.

[0030] The following are common devices for measuring permeability coefficients: 1. Constant head permeameter: The water head remains constant throughout the test. The permeability coefficient is calculated by measuring the amount of water permeating the sample within a certain time under a fixed head difference, based on Darcy's law. However, for materials with low permeability, the test time may be long. Maintaining a stable water head requires high precision in instrument sealing and water supply stability. 2. Variable head permeameter: The water head changes over time during the test. The permeability coefficient is calculated by measuring the water head height and corresponding permeation time at different times, based on Darcy's law and a specific formula. However, the test operation and data processing are complex, requiring high accuracy and stability of the instrument. Frequent readings of water head data are necessary during the test, increasing the potential for human error. 3. Concrete permeability coefficient measuring device: Similar to a geosynthetic permeability coefficient measuring device, but focusing more on the permeability performance of concrete materials. A certain water pressure is applied to the concrete sample, and the amount of water permeating the concrete within a specified time is measured to calculate the permeability coefficient. However, the instrument is large, occupies a lot of space, and is complex to operate, requiring professional operation and maintenance. The test cycle is long, especially for low-permeability concrete materials.

[0031] Please see Figure 1-5 As shown, this embodiment provides a portable device for testing the permeability coefficient of highly active plant capsule materials, including: a water supply group, which includes a water tank 1, a flow control valve 2, and a water pipe 3. The flow control valve 2 is fixedly installed on the inner wall of the water tank 1 and is connected to the water pipe 3; a measurement group, which includes an outer cylinder 4, an inner cylinder 5, a filter screen 6, a connecting steel plate 7, a digital water level sensor 8, and a flexible sealing gasket 9. The outer cylinder 4 and the inner cylinder 5 are fixed by the connecting steel plate 7. The digital water level sensor 8 is installed on the inner wall of the inner cylinder 5. The water pipe 3 is connected to the inner wall of the outer cylinder 4. The filter screen 6 is fixedly installed between the top of the outer cylinder 4 and the inner cylinder 5. The flexible sealing gasket 9 can be placed at the bottom of the inner cylinder 5 and fits against the inner wall of the inner cylinder 5; and a hand grip 10, which is hinged to the outer wall of the outer cylinder 4.

[0032] The water supply unit consists of a water tank 1, a flow control valve 2, and a water pipe 3. Its purpose is to inject water into the double ring formed by the outer cylinder 4 and the inner cylinder 5 in the measuring unit and to control the flow rate.

[0033] The measuring unit mainly consists of an outer cylinder 4, an inner cylinder 5, a filter screen 6, a flexible sealing gasket 9, a connecting steel plate 7, and a digital water level sensor 8. The inner cylinder 5 is the key device for measuring water infiltration. Combined with the digital water level sensor 8, it can achieve accurate measurement of the infiltration volume. The outer cylinder 4 maintains a constant water level during the measurement process to reduce lateral interference of the water flow. The filter screen 6 slows down the flow rate of water entering the inner cylinder 5. The sealing gasket is used to prevent water from flowing out of the bottom of the inner cylinder 5 and reduce the measurement error of the infiltration volume of the inner cylinder 5.

[0034] The 10-hand grip makes it easy to carry.

[0035] The portable device used to test the permeability coefficient of highly active plant capsule materials involves the following steps: First, preparation: calibrate the water level sensor and then replenish the water tank 1. Second, device installation: locate the area where the permeability coefficient needs to be measured, and vertically insert the outer cylinder 4 and inner cylinder 5 into the test surface to a depth of 5-10 cm, ensuring the ring device is stable. Check the seal between the ring and the material surface. If there is a gap, a flexible washer can be used for adjustment. Place the flexible washer at the bottom of the inner cylinder 5 and loop it over the gap between the test materials. If there is no gap, it is not necessary to use it. Finally, inject water into both rings: inject water into the inner and outer rings through the water tank 1, maintaining a consistent water head height (e.g., 5 cm). Use the flow control valve 2 to keep the water head of the outer ring constant and reduce water level fluctuations.

[0036] After completing the above preparations, data can be read. The water level in the inner ring is observed and recorded over time by the digital water level sensor 8, while the water head in the outer ring is kept constant. At the same time, the infiltration rate q in the inner ring is calculated by recording the water level changes and time intervals. The average infiltration rate in the stable phase is taken as the basis for calculating the permeability coefficient.

[0037] The formula for calculating its permeability coefficient is as follows:

[0038] q=ΔH / Δt

[0039] Where: q: water permeation rate per unit time (cm / s);

[0040] ΔH: Water level drop (cm);

[0041] Δt: Time interval (s);

[0042] Κ=q / h

[0043] Where: K: permeability coefficient (cm / s);

[0044] q: Permeation rate (cm / s);

[0045] h: head difference (cm);

[0046] That is, the distance between the water level inside the ring and the test surface.

[0047] Finally, a time-permeability curve can be plotted to observe the trend of permeability change over time, and the permeability coefficients at different test points can be compared to analyze the uniformity of the highly active plant capsule material.

[0048] As can be seen, a telescopic tripod 11 is hinged to the outer wall of the outer cylinder 4. When conducting a double-ring permeation test, the outer cylinder 4 and the inner cylinder 5 need to be inserted vertically into the test surface, and their depths are different. The telescopic tripod 11 can adjust the height of the instrument to adapt to different test site conditions. Secondly, when conducting in-situ soil permeation tests in the field, the ground is uneven. By using the legs of the telescopic tripod, the instrument can be adjusted to a horizontal state to ensure that the inner cylinder 5 and the outer cylinder 4 are placed on a stable plane, thereby ensuring the accuracy of the test.

[0049] Furthermore, the telescopic tripod 11 provides a stable support structure to prevent the instrument from tipping over. The telescopic tripod 11 forms a stable triangular support plane, which can better resist external interference, such as in windy outdoor environments, to prevent the instrument from shaking and affecting the test results.

[0050] Finally, the telescopic tripod 11 is foldable and telescopic, which makes it easier to transport the double-ring permeator between different test sites. When not in use, the tripod can be folded down to a smaller size, making it easy to put into an instrument case or transport vehicle.

[0051] It should be noted that a telescopic tripod 11 generally consists of leg tubes, an adjustment mechanism, and connecting components. The leg tubes are typically made of aluminum alloy, which offers high strength and good toughness, allowing it to withstand a certain weight, and is relatively inexpensive. The adjustment mechanism controls the extension and retraction of the leg tubes; common adjustment mechanisms include screw-type and lever-type. Screw-type adjustment mechanisms lock or unlock the inner leg tubes by rotating a nut on the leg tube, allowing it to extend or retract. The advantages of this method are its simple structure, good stability, and relatively secure locking effect; the disadvantage is its relatively slow adjustment speed. Latch-type adjustment mechanisms unlock or lock the inner leg tubes by pressing or flipping a lever on the leg tube. This method offers fast adjustment and ease of use, making it practical for situations requiring frequent height adjustments. However, lever-type adjustment mechanisms may be relatively weak, and the levers may wear or break after prolonged use. The connecting components are hinged to the outer cylinder 4, facilitating folding and unfolding.

[0052] As can be seen, a rubber triangular block 12 is fixedly installed at the end of the telescopic tripod 11 that contacts the ground. In most cases, the telescopic tripod 11 does not need to be inserted into the ground. It is only necessary to increase the friction with the ground to prevent the inner cylinder 5 and the outer cylinder 4 from tilting. Therefore, a rubber triangular block 12 is fixedly installed at the leg tube of the telescopic tripod to increase the friction between the telescopic tripod 11 and the ground and improve its stability.

[0053] As can be seen, support blocks 13 are fixed to both the inner wall of the outer cylinder 4 and the outer wall of the inner cylinder 5. The filter screen 6 is embedded between the outer cylinder 4 and the inner cylinder 5 and can be placed on the support blocks 13. At the same time, a notch 14 adapted to the support block 13 is opened at the bottom of the filter screen 6. When the filter screen 6 is placed on the support block 13, the top of the filter screen 6 must be horizontal and parallel to the top of the inner cylinder 5. The filter screen 6 is used for filtration for a long time, and the test environment is relatively harsh. Dirt and debris can easily adhere to the surface of the filter screen 6, affecting water injection. The filter screen 6 is also difficult to clean. The best solution is to replace it. To this end, support blocks 13 are fixed on the inner wall of the outer cylinder 4 and the outer wall of the inner cylinder 5. The support blocks 13 are used to prevent the filter screen 6 from moving down due to gravity and being immersed in water, which would affect the test. A notch 14 that matches the support block 13 is opened at the bottom of the filter screen 6 to prevent the filter screen 6 from rotating. If the filter screen 6 rotates, debris in the gap between the filter screen 6 and the inner wall of the outer cylinder 4 can easily enter the water injection area between the outer cylinder 4 and the inner cylinder 5, causing the water surface to fluctuate and affecting the accuracy.

[0054] If the radii of the inner cylinder 5 and the outer cylinder 4 are too large, a large boundary effect is likely to occur during the test due to factors such as the interaction between the edge and the surrounding soil. The soil structure near the edge of the instrument may be changed due to the insertion of the instrument and the influence of water flow, resulting in the seepage situation not being able to truly reflect the natural state. By limiting the radius of the inner cylinder 5 to ≤10cm and the radius of the outer cylinder 4 to ≤20cm, this boundary effect can be reduced to a certain extent, making the test results closer to the real soil permeability characteristics.

[0055] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A portable device for testing the permeability coefficient of highly active plant-based capsule materials, characterized in that, include: The water supply unit includes a water tank (1), a flow control valve (2) and a water pipe (3). The flow control valve (2) is fixedly installed on the inner wall of the water tank (1) and is connected to the water pipe (3). The measuring assembly includes an outer cylinder (4), an inner cylinder (5), a filter screen (6), a connecting steel plate (7), a digital water level sensor (8), and a flexible sealing gasket (9). The outer cylinder (4) and the inner cylinder (5) are fixed together by the connecting steel plate (7). The digital water level sensor (8) is installed on the inner wall of the inner cylinder (5). The water pipe (3) is connected to the inner wall of the outer cylinder (4). A filter screen (6) is fixedly installed between the top of the outer cylinder (4) and the top of the inner cylinder (5). The flexible sealing gasket (9) can be placed at the bottom of the inner cylinder (5) and fit against the inner wall of the inner cylinder (5). Hand grip (10), which is hinged to the outer wall of the outer cylinder (4).

2. The portable device for testing the permeability coefficient of highly active plant capsule materials according to claim 1, characterized in that: The outer wall of the outer cylinder (4) is hinged with a telescopic tripod (11).

3. A portable device for testing the permeability coefficient of highly active plant capsule materials according to claim 2, characterized in that: A rubber triangular block (12) is fixedly installed at the end of the retractable tripod (11) that is in contact with the ground.

4. A portable device for testing the permeability coefficient of highly active plant capsule materials according to claim 1, characterized in that: The inner wall of the outer cylinder (4) and the outer wall of the inner cylinder (5) are both fixed with support blocks (13). The filter screen (6) is embedded between the outer cylinder (4) and the inner cylinder (5) and can be placed on the support block (13).

5. A portable device for testing the permeability coefficient of highly active plant capsule materials according to claim 4, characterized in that: The bottom of the filter screen (6) has a notch (14) that matches the support block (13).

6. A portable device for testing the permeability coefficient of highly active plant capsule materials according to claim 5, characterized in that: After the filter screen (6) is placed on the support block (13), the top of the filter screen (6) is horizontally parallel to the top of the inner cylinder (5).

7. A portable device for testing the permeability coefficient of highly active plant capsule materials according to claim 1, characterized in that: The radius of the inner cylinder (5) is ≤10cm, and the radius of the outer cylinder (4) is ≤20cm.

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