Soil permeability coefficient testing device

Abstract

The utility model discloses a soil permeability coefficient testing device which comprises a double-ring piece, an inner ring water supply bottle, an outer ring water supply bottle, a support, an inner ring glass tube, an outer ring glass tube, an inner ring rubber tube, an outer ring rubber tube, a floating ball liquid level meter, a timer and an instrument panel. The inner ring water supply bottle and the outer ring water supply bottle are fixed through the support, the floating ball liquid level meter is arranged in the inner ring water supply bottle, the inner ring glass tube and the inner ring rubber tube are vertically inserted into the lower end of the inner ring water supply bottle respectively, and the outer ring glass tube and the outer ring rubber tube are vertically inserted into the lower end of the outer ring water supply bottle respectively. Lower ports of the inner ring glass tube and the outer ring glass tube are positioned on the same horizontal plane, and upper ports of the inner ring glass tube and the outer ring glass tube extend to the top of the water supply bottle and are positioned at the bottom of the water supply bottle. The soil permeability coefficient testing device can improve the testing efficiency of the soil permeability coefficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to soil permeability coefficient test technical field, concretely relates to a soil permeability coefficient testing device. BACKGROUND

[0002] In the hydrological cycle process of nature, soil is the medium of water exchange, and its water permeability has an important influence on the speed of hydrological cycle, and the index for evaluating the water permeability of soil is soil permeability coefficient, so the index is one of important hydrological parameters, and has important reference significance for the distribution of runoff after rainfall and the degree of soil erosion. Soil infiltration rate in soil permeability coefficient is the quantitative representation of soil infiltration capacity, specifically, soil infiltration rate is the amount of water per unit surface area per unit time. The double ring method experiment is a simple method for measuring soil infiltration rate outdoors.

[0003] At present, when the double ring method is used to measure the soil permeability coefficient on site, the selected position is selected on the surface of the soil to be measured, then the separated inner ring and outer ring are pressed into the soil at the selected position, and the positions of the inner ring and the outer ring need to be adjusted so that the inner ring and the outer ring are concentric, and the upper edges of the inner ring and the outer ring are at the same horizontal plane. Then clean water is injected into the inner ring and the outer ring, and the water supply bottle is used to supply water to the inner ring and the outer ring respectively, and the water levels of the inner ring and the outer ring are kept at the same height. When the water flow from the water supply bottle reaches a stable state, the test can be started, and the start time of water seepage and the observed water level of the water supply bottle of the inner ring are manually recorded. After a certain time, the time and the observed water level of the water supply bottle of the inner ring are recorded again. The manual recording and observation of time and the water level of the water supply bottle of the inner ring are repeated 5-6 times within lh-2h. Finally, the average soil permeability coefficient is calculated according to the recorded data.

[0004] In the above operation process, it basically depends on manual operation, and repeated operation is needed, so the efficiency is low. In addition, the fixing of the existing inner ring and outer ring is difficult to ensure concentricity, and the inner ring and the outer ring are difficult to press into the soil, which is laborious to operate. Even if the inner ring and the outer ring are pressed into the soil, there is also a gap between the inner ring and the outer ring and the soil, which leads to water leakage on the side. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a soil permeability coefficient testing device which can improve the test efficiency of soil permeability coefficient.

[0006] The utility model realizes the purpose by the following technical scheme:

[0007] The utility model provides a kind of soil permeability coefficient testing device, it is characterized by: including double ring, inner ring water supply bottle, outer ring water supply bottle, support, inner ring glass tube, outer ring glass tube, inner ring rubber tube, outer ring rubber tube, float liquid level meter, timer and the instrument panel for displaying the liquid level of float liquid level meter measurement and the time of timer, double ring includes inner ring and outer ring fixedly connected together by connecting piece, inner ring and outer ring are concentric, and the upper edge of inner ring and outer ring is located at the same horizontal plane, the cross-sectional shape of lower edge is downward pointed end shape, inner ring water supply bottle and outer ring water supply bottle are fixed in the upper of the soil to be measured by support, float liquid level meter is arranged in inner ring water supply bottle, for measuring the liquid level of liquid in inner ring water supply bottle, timer is used to time the testing process, inner ring glass tube and inner ring rubber tube are vertically inserted in the lower end of inner ring water supply bottle respectively, outer ring glass tube and outer ring rubber tube are vertically inserted in the lower end of outer ring water supply bottle respectively, the lower end of inner ring glass tube and outer ring glass tube is located at the same horizontal plane, and upper end is extended to the top of inner ring water supply bottle and outer ring water supply bottle, the upper end of inner ring rubber tube and outer ring rubber tube is located at the bottom of inner ring water supply bottle and outer ring water supply bottle;When testing, the lower end of outer ring glass tube and outer ring rubber tube will be located in the space between outer ring and inner ring, and the lower end of inner ring glass tube and inner ring rubber tube will be located in the space of inner ring.

[0008] The utility model further provides a technical scheme: the upper end of inner ring water supply bottle is equipped with inner ring through -hole, and inner ring rubber plug is inserted in inner ring through -hole, the upper end of outer ring water supply bottle is equipped with outer ring through -hole, and outer ring rubber plug is inserted in outer ring through -hole.

[0009] The utility model further provides a technical scheme: connecting piece includes multiple metal strips, and the multiple metal strips are evenly arranged between inner ring and outer ring in circumferential direction, and the two ends of metal strip are fixedly connected with inner ring and outer ring respectively.

[0010] The utility model further provides a technical scheme: the lower end of outer ring glass tube and inner ring glass tube is inclined.

[0011] The utility model further provides a technical scheme: support includes middle plate, top plate and multiple insertion rods evenly distributed in periphery, the lower end of insertion rod is used for inserting into soil, middle plate is horizontally fixedly installed in the middle part of insertion rod, top plate is horizontally fixedly installed in the upper end of insertion rod, and inner ring water supply bottle and outer ring water supply bottle are arranged between middle plate and top plate.

[0012] The utility model further provides a technical scheme: the lower end of insertion rod is provided as sharp head.

[0013] The utility model further provides a technical scheme: float liquid level meter includes output module, insertion rod and float ball movably sleeved on insertion rod, insertion rod is vertically inserted into inner ring water supply bottle, output module is arranged on the top of top plate, and the output end of output module is connected with instrument panel electric wire.

[0014] Compared with the prior art, the utility model has the advantages of the following:

[0015] 1, the utility model discloses the inner ring and outer ring are fixedly connected together through connecting piece, and when fixed connection, make the inner ring and outer ring concentric and make the upper edge of inner ring and outer ring be located on the same horizontal plane, when using, can directly with inner ring and outer ring press into the soil and fix, need not worry about the problem of whether the inner ring and outer ring are concentric and the problem of whether the upper edge is located on the same horizontal plane, improve installation efficiency, also guarantee installation quality.

[0016] 2, the lower edge of the inner ring and outer ring of the utility model is set up as the sharp end, make the inner ring and outer ring can press into the soil more easily, installation efficiency is higher, and the inner ring and outer ring and soil are not easy to appear the gap between.

[0017] 3, the utility model discloses when testing, measure liquid level and record test time through the float ball liquid level meter and timer, need not rely on artificial again, efficiency is higher.

[0018] 4, the soil permeability coefficient testing device of the utility model reduces the operation difficulty of testing, uses more conveniently, can better guarantee the accuracy of testing. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is the structure schematic diagram of the soil permeability coefficient testing device of the utility model embodiment;

[0020] Fig. 2 It is the overhead schematic diagram of the double ring piece of the utility model embodiment;

[0021] Fig. 3 It is the three-dimensional schematic diagram of the double ring piece of the utility model embodiment.

[0022] Meaning of reference signs in the drawing:

[0023] 1-support;2-inner ring water bottle;3-outer ring water bottle;4-inner ring glass tube;5-outer ring glass tube;6-inner ring rubber tube;7-outer ring rubber tube;8-inner ring;9-outer ring;10-inner ring rubber plug;11-outer ring rubber plug;12-inserting rod;13-float ball;14-output module;15-instrument panel;16-metal strip;17-top plate;18-inserting rod;19-intermediate plate;20-soil to be measured;21-the space between outer ring and inner ring;22-the space of inner ring;23-sharp end. DETAILED DESCRIPTION

[0024] The utility model is further described below in combination with the embodiment.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Example:

[0029] like Figs. 1 to 3 The soil permeability coefficient testing device shown in this embodiment includes a double-ring component, an inner ring water supply bottle 2, an outer ring water supply bottle 3, a support 1, an inner ring glass tube 4, an outer ring glass tube 5, an inner ring rubber tube 6, an outer ring rubber tube 7, a float level gauge, a timer, and an instrument panel 15.

[0030] The double-ring component is a single piece, comprising an inner ring 8 and an outer ring 9, both made of metal. The inner ring 8 and outer ring 9 are fixedly connected together by a connector, maintaining concentricity. In this embodiment, the connector includes four metal strips 16, such as... Fig. 2 As shown, four metal strips 16 are evenly arranged circumferentially between the inner ring 8 and the outer ring 9, and the two ends of the metal strips 16 are welded to the inner ring 8 and the outer ring 9 respectively. The upper edges of the inner ring 8 and the outer ring 9 are located on the same horizontal plane, and the lower edges are also located on the same horizontal plane.

[0031] like Fig. 3 As shown, the lower edge cross-sectional shape of the inner ring 8 and the outer ring 9 is set to a downward pointed shape, so that the lower ends of the inner ring 8 and the outer ring 9 can be more easily pressed into the soil when the inner ring 8 and the outer ring 9 are installed.

[0032] The support 1 of the embodiment comprises a middle plate 19, a top plate 17 and four insertion rods 18 evenly distributed in the periphery, the lower end of the insertion rod 18 is provided with a sharp tip, which can be more easily inserted into the soil. The middle plate 19 is horizontally fixedly installed in the middle of the insertion rod 18, the top plate 17 is horizontally fixedly installed at the upper end of the insertion rod 18, and the inner ring water supply bottle 2 and the outer ring water supply bottle 3 are arranged side by side between the middle plate 19 and the top plate 17. In use, the inner ring water supply bottle 2 and the outer ring water supply bottle 3 will be fixed by the support 1 above the soil 20 to be tested and above the double-ring part.

[0033] The upper end of the inner ring water supply bottle 2 is provided with an inner ring through hole, and the inner ring rubber plug 10 is inserted into the inner ring through hole. The upper end of the outer ring water supply bottle 3 is provided with an outer ring through hole, and the outer ring rubber plug 11 is inserted into the outer ring through hole. During the test, the opening of the inner ring through hole and the outer ring through hole can make the external air enter the inner ring water supply bottle 2 and the outer ring water supply bottle 3 more quickly, so that the water in the inner ring water supply bottle 2 and the outer ring water supply bottle 3 can flow down into the inner ring 8 and the outer ring 9 more quickly.

[0034] The float liquid level meter is arranged in the inner ring water supply bottle 2 and is used for measuring the liquid level of the liquid in the inner ring water supply bottle 2. The float liquid level meter comprises an output module 14, an insertion rod 12 and a float ball 13 movably sleeved on the insertion rod 12, the insertion rod 12 vertically penetrates into the inner ring water supply bottle 2, the output module 14 is arranged on the upper surface of the top plate 17, the output end of the output module 14 is electrically connected with the instrument panel 15, the liquid level signal measured by the float liquid level meter will be output to the instrument panel 15 through the output module 14, and the instrument panel 15 can receive and display the liquid level signal.

[0035] The timer is used for timing the test process, and the timer is arranged in the instrument panel 15. The time of the timer 15 can be displayed on the instrument panel.

[0036] The inner ring glass tube 4 and the inner ring rubber tube 6 are respectively vertically inserted into the lower end of the inner ring water supply bottle 2, and the lower ports of the inner ring glass tube 4 and the inner ring rubber tube 6 are located below the inner ring water supply bottle 2. During the test, the lower ports of the inner ring glass tube 4 and the inner ring rubber tube 6 will be located in the space 22 of the inner ring. The upper port of the inner ring glass tube 4 extends to the top of the inner ring water supply bottle 2, and during the test, the upper port of the inner ring glass tube 4 will be located above the liquid level in the inner ring water supply bottle 2, and the inner ring glass tube 4 is used for air inflow. The upper port of the inner ring rubber tube 6 is located at the bottom of the inner ring water supply bottle 2, and during the test, the upper port of the inner ring rubber tube 6 will be located at the bottom of the liquid in the inner ring water supply bottle 2. The liquid in the inner ring water supply bottle 2 can flow downward into the space 22 of the inner ring through the inner ring rubber tube 6.

[0037] The outer ring glass tube 5 and the outer ring rubber tube 7 are vertically inserted into the lower end of the outer ring water supply bottle 3, and the lower ports of the outer ring glass tube 5 and the outer ring rubber tube 7 are located below the outer ring water supply bottle 3. During the test, the lower ports of the outer ring glass tube 5 and the outer ring rubber tube 7 are located in the space 21 between the outer ring and the inner ring. The upper port of the outer ring glass tube 5 extends to the top of the outer ring water supply bottle 3, and during the test, the upper port of the outer ring glass tube 5 will be located above the liquid level in the outer ring water supply bottle 3, and the outer ring glass tube 5 is used for air inflow. The upper port of the outer ring rubber tube 7 is located at the bottom of the outer ring water supply bottle 3, and during the test, the upper port of the outer ring rubber tube 7 will be located at the bottom of the liquid in the outer ring water supply bottle 3, and the liquid in the outer ring water supply bottle 3 can flow downward through the outer ring rubber tube 7 into the space 21 between the outer ring and the inner ring.

[0038] In addition, the lower ports of the inner ring glass tube 4 and the outer ring glass tube 5 are located at the same horizontal plane, and the lower ports of the inner ring glass tube 4 and the outer ring glass tube 5 are beveled.

[0039] The test process of the soil permeability coefficient testing device of the embodiment is as follows:

[0040] 1. First, place the double-ring part on the soil to be tested 20, with the sharp end 23 of the inner ring 8 and the outer ring 9 facing downward, and press the lower edge of the outer ring 9 and the inner ring 8 into the soil by 3-5 cm, then inject clean water into the space 22 of the inner ring and the space 21 between the outer ring and the inner ring until full.

[0041] 2. Place the support 1, insert the lower end of the support 1 into the soil to fix it, and after fixing, the support 1 will be in a horizontal state.

[0042] 3. Fill the inner ring water supply bottle 2 and the outer ring water supply bottle 3 with clean water, insert the lower ports of the inner ring glass tube 4 and the inner ring rubber tube 6 into the space 22 of the inner ring, and the lower ports are below the water surface, insert the outer ring glass tube 5 and the outer ring rubber tube 7 of the outer ring water supply bottle 3 into the space 21 between the outer ring and the inner ring, and the lower ports are below the water surface, and the inner ring glass tube 4 and the outer ring glass tube 5 should be at the same height.

[0043] 4. Adjust the liquid level in the inner ring 8 and the outer ring 9 to the same height. At the beginning, the speed of clean water penetrating into the soil is unstable, and the clean water in the inner ring 8 and the outer ring 9 may drop relatively fast. In order to adjust the liquid level to the same height faster, the inner ring rubber plug 10 or the outer ring rubber plug 11 can be opened to adjust the water output of the inner ring water supply bottle 2 and the outer ring water supply bottle 3 until the liquid level in the inner ring 8 and the outer ring 9 is at the same height, the speed of clean water penetrating into the soil becomes stable, and the water output of the inner ring water supply bottle 2 and the outer ring water supply bottle 3 becomes stable, then the inner ring rubber plug 10 and the outer ring rubber plug 11 are re-inserted. At this time, the liquid level of the inner ring water supply bottle 2 cannot make the float ball 13 of the float ball liquid level meter touch the top.

[0044] 5. Next, the soil permeability coefficient can be tested. Turn on the instrument panel 15, which displays the current initial liquid level. Record the current initial liquid level, and simultaneously start the timer. At regular intervals, record the corresponding liquid level and time through the instrument panel 15. By comparing two consecutive time intervals, the duration in between can be determined. Record the liquid level and time at least 5 to 6 times within 1 to 2 hours. Finally, calculate the average soil permeability coefficient based on the recorded data.

[0045] During the test, the water in the inner ring space 22 and the space 21 between the outer ring and the inner ring will continuously seep into the soil, and the liquid level will continuously drop. When the liquid level is lower than the lower end of the inner ring glass tube 4 or the outer ring glass tube 5, the lower end of the inner ring glass tube 4 or the outer ring glass tube 5 will be exposed above the water surface. Air will enter the inner ring water supply bottle 2 or the outer ring water supply bottle 3 from the inner ring glass tube 4 or the outer ring glass tube 5, so that the air pressure inside and outside the water supply bottle is equal. The water in the inner ring water supply bottle 2 or the outer ring water supply bottle 3 will flow downward from the inner ring rubber tube 6 or the outer ring rubber tube 7 until the liquid level in the inner ring 8 or the outer ring 9 returns to above the lower end of the inner ring glass tube 4 or the outer ring glass tube 5.

[0046] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A soil permeability coefficient testing device, characterized by: The utility model provides a double ring, inner ring water supply bottle, outer ring water supply bottle, support, inner ring glass tube, outer ring glass tube, inner ring rubber tube, outer ring rubber tube, float liquid level meter, timer and instrument panel for displaying liquid level of float liquid level meter measurement and time of timer, the double ring includes inner ring and outer ring fixedly connected together through connecting piece, the inner ring and outer ring are concentric, and the upper edge of the inner ring and the outer ring is located at the same horizontal plane, the lower edge is the shape of downward pointed end, the inner ring water supply bottle and the outer ring water supply bottle are fixed above the soil to be measured through the support, the float liquid level meter is arranged in the inner ring water supply bottle and is used for measuring the liquid level of liquid in the inner ring water supply bottle, the timer is used for timing the test process, the inner ring glass tube and the inner ring rubber tube are respectively vertically inserted in the lower end of the inner ring water supply bottle, the outer ring glass tube and the outer ring rubber tube are respectively vertically inserted in the lower end of the outer ring water supply bottle, the lower port of the inner ring glass tube and the outer ring glass tube is located at the same horizontal plane, and the upper port extends to the top of the inner ring water supply bottle and the outer ring water supply bottle, the upper port of the inner ring rubber tube and the outer ring rubber tube is located at the bottom of the inner ring water supply bottle and the outer ring water supply bottle, when testing, the lower port of the outer ring glass tube and the outer ring rubber tube will be located in the space between the outer ring and the inner ring, and the lower port of the inner ring glass tube and the inner ring rubber tube will be located in the space of the inner ring.

2. The soil permeability coefficient testing device according to claim 1, characterized in that: The upper end of the inner ring water supply bottle is provided with an inner ring through hole, an inner ring rubber plug is inserted in the inner ring through hole, the upper end of the outer ring water supply bottle is provided with an outer ring through hole, and an outer ring rubber plug is inserted in the outer ring through hole.

3. The soil permeability coefficient testing device of claim 1, wherein: The connecting piece includes a plurality of metal strips, and the plurality of metal strips are uniformly arranged between the inner ring and the outer ring in the circumferential direction.

4. The soil permeability coefficient testing device of claim 1, wherein: The lower ports of the outer ring glass tube and the inner ring glass tube are beveled.

5. The soil permeability coefficient testing device of claim 1, wherein: The support includes a middle plate, a top plate and a plurality of insertion rods uniformly distributed on the periphery, the lower end of the insertion rod is used for inserting into the soil, the middle plate is horizontally fixedly installed at the middle part of the insertion rod, the top plate is horizontally fixedly installed at the upper end of the insertion rod, and the inner ring water supply bottle and the outer ring water supply bottle are arranged between the middle plate and the top plate.

6. The soil permeability coefficient testing device according to claim 5, characterized in that: The lower end of the insertion rod is provided as a sharp head.

7. The soil permeability coefficient testing device of claim 5, wherein: The float liquid level meter includes an output module, an insertion rod and a float ball movably sleeved on the insertion rod, the insertion rod penetrates vertically into the inner ring water supply bottle, the output module is arranged on the top of the top plate, and the output end of the output module is connected with the instrument panel through wires.

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