Cutting ring sealing box for measuring saturated hydraulic conductivity

Abstract

The utility model provides a cutting ring seal box for measuring saturated hydraulic conductivity, which relates to the field of soil detection and soil scientific experiment equipment and comprises a seal box body, a top cover is mounted at the top of the seal box body, a bottom cover is mounted at the bottom of the seal box body, the seal box body, the top cover and the bottom cover are cylindrical, a water inlet is arranged on one side of the top cover, and a water outlet is arranged on the other side of the bottom cover. A water inlet is formed in one side of the bottom cover, a water outlet is formed in one side of the bottom cover, pipe plugs are connected to the water inlet and the water outlet in a clamped mode, the cutting ring sealing box serves as a key accessory for soil saturation hydraulic conductivity measurement and has the remarkable beneficial effects, multiple functions are creatively integrated, and in a traditional mode, the soil saturation hydraulic conductivity measuring device is convenient to use. Different treatment processes and equipment are often needed for soil saturated hydraulic conductivity measurement and soil moisture characteristic curve measurement through a centrifugal machine, however, according to the sealing box, the cutting ring which is used for extracting undisturbed soil can be directly embedded into the box body, a special cutting ring is not needed for sampling and measurement, and the sampling workload is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to soil detection and soil science experimental equipment field especially relates to a ring cutter sealing box for saturated hydraulic conductivity determination. BACKGROUND

[0002] In the field of soil science research, soil saturated hydraulic conductivity and soil moisture characteristic curve are important indexes for evaluating soil physical properties, which are of great significance for understanding soil water movement law, agricultural irrigation management, soil erosion prediction and many other aspects.

[0003] Traditional soil saturated hydraulic conductivity determination usually relies on special ring cutter sampling device and complex experimental process. The commonly used undisturbed soil cutting ring cutter is a stainless steel ring cutter with an inner diameter of 5cm and a height of 5cm. After collecting the soil sample, if the soil moisture characteristic curve is to be determined, the soil in the ring cutter needs to be saturated with water. However, the traditional saturated hydraulic conductivity determination method has many defects:

[0004] 1. The sealing method is complicated and the effect is not good. Traditional ring cutter sealing often uses tape winding, simple clamp fixing and other methods. These methods are very inconvenient to operate, especially in the field environment, the sealing process is more difficult due to environmental factors. Moreover, this simple sealing method cannot ensure the reliability of the sealing, and water leakage may occur, which may change the water content of the soil sample and seriously affect the accuracy of the experimental results; 2. The experimental process is not smooth. When determining the soil saturated hydraulic conductivity and the soil moisture characteristic curve, the traditional method cannot effectively connect the two, so a ring cutter sealing box for saturated hydraulic conductivity determination is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the defects in the prior art and provides a ring cutter sealing box for saturated hydraulic conductivity determination.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a ring cutter sealing box for saturated hydraulic conductivity determination, comprising a sealing box main body, a top cover is installed at the top of the sealing box main body, a bottom cover is installed at the bottom of the sealing box main body, the sealing box main body, the top cover and the bottom cover are all cylindrical, a water inlet is arranged on one side of the top cover, a water outlet is arranged on one side of the bottom cover, pipe plugs are clamped at the water inlet and the water outlet.

[0007] Preferably, the inside of the top cover and the bottom cover is provided with a first annular clamping groove, and the inner side of the first annular clamping groove is provided with a second annular clamping groove.

[0008] Preferably, the first and second annular clamping grooves are arranged in a stepped manner, the first annular clamping groove is larger in diameter and shallower in depth than the second annular clamping groove.

[0009] Preferably, the first annular clamping grooves of the top cover and the bottom cover are clamped with the main body of the sealing box.

[0010] Preferably, the second annular clamping grooves of the top cover and the bottom cover are clamped with the ring knife, and the top cover is clamped with the sealing ring near the top.

[0011] Preferably, the inner annular array of the main body of the sealing box has clamping grooves, the inner wall of the main body of the sealing box and the outer wall of the ring knife are matched with each other, the outer annular array of the ring knife has sliding blocks, and the sliding blocks and the clamping grooves are matched with each other.

[0012] Preferably, the inner part of the front of the main body of the sealing box is provided with a heating wire, the end of the heating wire is electrically connected with a heating controller, and the back of the main body of the sealing box is provided with a cooling water pipe.

[0013] Beneficial effects

[0014] In the utility model, the ring knife sealing box is the key accessory for determining the saturated hydraulic conductivity of soil, has very remarkable beneficial effects, and innovatively integrates multiple functions in one, and is perfectly matched with the commonly used stainless steel ring knife with an inner diameter of 5cm and a height of 5cm. Under the traditional mode, the determination of the saturated hydraulic conductivity of soil and the determination of the soil moisture characteristic curve by the centrifuge often need different processing procedures and equipment, but the sealing box can directly embed the ring knife after the soil undisturbed soil is taken out, does not need special ring knife sampling determination, and greatly reduces the sampling workload. In the sealing link, compared with the traditional complicated and unstable sealing effect method, the sealing box realizes quick and convenient sealing through unique design, effectively prevents water leakage and external interference of the sample, and guarantees the experimental accuracy. Whether it is the soil saturation process or the subsequent connection experiment water supply for determining the saturated hydraulic conductivity, the operation is extremely convenient and smooth, greatly improves the experimental efficiency, and reduces the human error and time cost in the experimental process.

[0015] The utility model discloses a ring knife sealing box, which is used for soil detection experiment, and has the characteristics of high efficiency, reliability and multifunction, and can stably play a role in laboratory research on the physical properties of different soil types and in the scene of field soil investigation, thereby providing an efficient, reliable and multifunctional experimental tool for soil scientific research and powerfully promoting the development and progress of the soil detection technology field. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the utility model;

[0017] Figure 2 It is the overall internal structure diagram of the utility model;

[0018] Figure 3 It is the sealing box main body dismounting structure diagram of the utility model;

[0019] Figure 4 It is the top cover and bottom cover structure diagram of the utility model;

[0020] Figure 5 It is the sealing box main body structure diagram of the utility model.

[0021] Legend:

[0022] 1, sealing box main body, 2, top cover, 3, bottom cover, 4, water inlet, 5, water outlet, 6, first annular clamping groove, 7, second annular clamping groove, 8, ring knife, 9, sealing ring, 10, clamping groove, 11, sliding block, 12, pipe plug, 13, heating wire, 14, heating controller, 15, cooling water pipe. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the utility model.

[0024] The specific embodiments of the utility model are described below in combination with the drawings. Specific embodiment one:

[0026] Referring to Figures 1-5 A ring knife sealing box for saturated hydraulic conductivity determination, comprising a sealing box body 1, a top cover 2 is installed on the top of the sealing box body 1, a bottom cover 3 is installed on the bottom of the sealing box body 1, the sealing box body 1, the top cover 2 and the bottom cover 3 are all cylindrical, a water inlet 4 is arranged on one side of the top cover 2, a water outlet 5 is arranged on one side of the bottom cover 3, pipe plugs 12 are clamped at the water inlet 4 and the water outlet 5, first annular clamping grooves 6 are arranged in the interiors of the top cover 2 and the bottom cover 3, and second annular clamping grooves 7 are arranged on the inner sides of the first annular clamping grooves 6.

[0027] The first annular clamping grooves 6 and the second annular clamping grooves 7 are arranged in a stepped manner, the first annular clamping grooves 6 are larger in diameter and shallower in depth than the second annular clamping grooves 7, the sealing box body 1 is clamped between the first annular clamping grooves 6 of the top cover 2 and the bottom cover 3, the ring knife 8 is clamped between the second annular clamping grooves 7 of the top cover 2 and the bottom cover 3, a sealing ring 9 is clamped in the top cover 2 close to the top position, the sealing box body 1 is internally provided with annularly arranged clamping grooves 10, the inner wall of the sealing box body 1 and the outer wall of the ring knife 8 are in close contact with each other, the ring knife 8 is externally provided with annularly arranged sliding blocks 11, the sliding blocks 11 and the clamping grooves 10 are matched with each other, a heating wire 13 is installed on the front inner side of the sealing box body 1, the end of the heating wire 13 is electrically connected with a heating controller 14, a cooling water pipe 15 is arranged on the back inner side of the sealing box body 1, the sealing box body 1 is of a whole annular structure, one half of the interior is provided with a heating constant temperature assembly, and the other half of the interior is provided with a cooling assembly, wherein the soil sampling ring knife 8 is a stainless steel ring knife with an inner diameter of 5 cm and a height of 5 cm.

[0028] The aperture of the water inlet 4 and the water outlet 5 is reasonably designed to be 5-8mm, which can ensure that the water can enter and exit the sealed box at an appropriate flow rate when the soil saturation treatment or saturated hydraulic conductivity measurement is carried out, and can prevent the sealing difficulty caused by too large aperture. The inner wall of the water inlet and the water outlet is provided with a thread, and the pipe plug 12 adopts a thread structure matched therewith, and the tight sealing can be realized by rotating the pipe plug. In addition, a rubber sealing gasket is designed on the top of the pipe plug, which is extruded between the pipe plug and the water inlet or the water outlet when the pipe plug is screwed, thereby further enhancing the sealing effect. The water inlet 4 and the water outlet 5 are selected to be located on one side of the top cover 2 and the bottom cover 3 close to the edge, so that the water pipe does not interfere with other operating parts of the sealed box when the external water pipe is connected for experimental operation, thereby facilitating the operation of the experimental personnel. Meanwhile, the quick connector can be connected to the outside of the water inlet and the water outlet, so as to more quickly connect and replace the water pipe. The cooling water pipe 15 is made of copper pipe, which has good heat conduction performance and can effectively conduct the heat in the sealed box body to the outside. The cooling water pipe is arranged in a serpentine shape in the sealed box body, which increases the contact area of the water pipe with the air in the sealed box body and improves the cooling efficiency. The two ends of the cooling water pipe are respectively connected to the external cooling water source and the drain, and when the cooling operation is carried out, the cold water flows into one end and flows out from the other end after absorbing heat, thereby realizing the temperature reduction of the sealed box body. The sealing glue is used to seal the connection between the cooling water pipe and the sealed box body, thereby preventing the leakage phenomenon. Embodiment two:

[0030] Reference Figures 1-5Firstly, a stainless steel ring knife 8 with an inner diameter of 5 cm and a height of 5 cm is placed in the sealed box body 1, and the sliding block 11 outside the ring knife 8 is slid along the clamping groove 10 of the annular array inside the sealed box body 1. Through the mutual adaptation of the sliding block 11 and the clamping groove 10, the precise positioning and stable placement of the ring knife 8 in the sealed box body 1 are realized, ensuring that the outer wall of the ring knife 8 is tightly fitted with the inner wall of the sealed box body 1, reducing the gap, preventing soil sample leakage or external moisture from abnormally penetrating, and then the top cover 2 and the bottom cover 3 are respectively installed on the sealed box body 1. The first annular clamping groove 6 of the top cover 2 and the bottom cover 3 is clamped with the sealed box body 1, realizing the packaging of the top and bottom of the sealed box body 1. At the same time, the second annular clamping groove 7 of the top cover 2 and the bottom cover 3 is clamped with the ring knife 8, further fixing the position of the ring knife 8, and the sealing ring 9 clamped in the top cover 2 near the top position is extruded when the top cover 2 is installed in place, filling the small gap between the top cover 2 and the top of the ring knife 8, forming a reliable top seal. At the water inlet 4 and the water outlet 5, through the cooperation of the pipe plug 12 with rubber sealing gasket and the inner wall thread, rotating the pipe plug 12 to tightly extrude the rubber sealing gasket, realizing the sealing of the water inlet 4 and the water outlet 5, preventing water leakage during non-experimental operation. When the soil saturation treatment is carried out, the pipe plug 12 at the water inlet 4 is removed and connected to an external water source (such as a water pump or a water tank). Since the aperture of the water inlet 4 is designed to be 5-8 mm, under appropriate water supply pressure, water can enter the sealed box body 1 through the water inlet 4 at an appropriate flow rate. Water gradually fills the space between the sealed box body 1 and the ring knife 8, and penetrates into the soil sample in the ring knife 8. With the passage of time, the soil sample continuously absorbs water until it reaches a saturated state. When the soil sample may reach saturation, the pipe plug 12 of the water outlet 5 can be opened to observe whether water flows out and the state of the outflowing water. If the outflowing water is clear and the flow is stable, it can be preliminarily judged that the soil has been basically saturated. The degree of soil saturation can also be comprehensively judged by combining various ways such as soil weight change and humidity sensor.

[0031] After the soil is saturated, the sealed box can be connected to the saturated hydraulic conductivity measurement experimental device. Water is supplied to the sealed box through the water inlet 4 at a specific pressure and flow rate, and the water flows out from the water outlet 5 through the saturated soil sample under the action of pressure. In this process, by measuring the water inflow at the water inlet 4, the water outflow at the water outlet 5, and the pressure change in the sealed box, etc., the saturated hydraulic conductivity of the soil can be calculated using relevant theoretical formulas such as Darcy's law. During the experiment, the flow rate and pressure data at different time points are accurately collected, and these data are arranged and analyzed. For example, according to the difference between the water inflow and the water outlet flow and the pressure gradient in the sealed box under steady flow state, the water conductivity of the soil in the saturated state is calculated, and the accurate value of the saturated hydraulic conductivity is obtained.

[0032] When the experiment needs to be carried out at a specific temperature, such as the study of the effect of temperature on saturated hydraulic conductivity, the heating wire 13 can be started. The heating wire 13 is made of nickel-chromium alloy material, which quickly generates heat after being electrified. The heat is transferred to the air and soil sample in the sealed box body 1 through heat conduction. The heating controller 14 monitors the temperature inside the sealed box body 1 in real time according to the preset temperature value. When the temperature is lower than the set value, the heating controller 14 automatically turns on the power supply of the heating wire 13 to continue heating. When the temperature reaches the set value, the power supply is automatically cut off to stop heating, so that the inside of the sealed box body 1 is kept at a constant temperature, ensuring that the experiment is carried out under stable temperature conditions. If the temperature needs to be lowered during the experiment, the cooling water source of the cooling water pipe 15 can be turned on. Cold water flows into one end of the cooling water pipe 15. Due to the good heat conduction performance of the copper pipe, the cooling water pipe 15 can quickly absorb the heat inside the sealed box body 1. The cooling water pipe 15 is arranged in a serpentine shape inside the sealed box body 1, which increases the contact area with the internal air and improves the cooling efficiency. The cold water after absorbing heat flows out from the other end of the cooling water pipe 15 and is discharged into the drain, thereby achieving the cooling of the inside of the sealed box body 1 and making the soil sample temperature reach the low temperature required by the experiment. At the connection between the cooling water pipe 15 and the sealed box body 1, the sealing glue effectively prevents water leakage, ensuring the safety and stability of the cooling process.

[0033] In summary:

[0034] 1. In the device, the overall structure is mainly composed of a sealed box body 1, a top cover 2 and a bottom cover 3, which is in the shape of a cylinder. The inside of the sealed box body 1 is precisely fixed by the cooperation of the clamping groove 10 and the sliding block 11. The annular clamping grooves of the top cover 2 and the bottom cover 3 are connected with the sealed box body 1 and the ring knife 8, and the sealing effect is enhanced by the help of the sealing ring 9 and the pipe plug 12. The sealed box is provided with a water inlet 4 and a water outlet 5 for water inlet and outlet, and the aperture is reasonable, threaded and provided with sealing pads to ensure sealing and appropriate water flow. In addition, the sealed box body 1 is also equipped with a heating and constant temperature assembly and a cooling assembly, which can adjust the internal temperature as needed to provide a stable environment for soil saturated hydraulic conductivity measurement and reliable sealing, temperature control and other functional protection.

[0035] 2. In use, first put the ring knife 8 into the sealed box body 1 and fix it, then install the top cover 2 and the bottom cover 3 to complete the sealing. When the soil saturation treatment is carried out, water is injected from the water inlet 4 to make the soil saturated with water, and the saturation degree can be judged through the water outlet 5 and other ways. After saturation, connect the experimental device, and measure the saturated hydraulic conductivity according to the water inlet and outlet flow and pressure change parameters. In terms of temperature control, the heating wire 13 cooperates with the heating controller 14 to achieve constant temperature heating, and the cooling water pipe 15 realizes cooling by introducing and discharging cooling water, thereby meeting the experimental requirements under different temperature conditions, and the whole realizes a convenient, accurate and multifunctional soil saturated hydraulic conductivity measurement process.

[0036] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "on" second feature include that first feature is directly above and obliquely above second feature, or only indicate that first feature horizontal height is higher than second feature. First feature "under", "below" and "under" second feature include that first feature is directly below and obliquely below second feature, or only indicate that first feature horizontal height is less than second feature.

[0037] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above examples, the above examples and the description in the specification are only preferred examples of the utility model, and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sealed ring for saturated hydraulic conductivity determination, comprising a sealed box body (1), characterized in that: The top of the sealing box body (1) is provided with a top cover (2), and the bottom of the sealing box body (1) is provided with a bottom cover (3), the sealing box body (1), the top cover (2) and the bottom cover (3) are cylindrical, one side of the top cover (2) is provided with a water inlet (4), one side of the bottom cover (3) is provided with a water outlet (5), and the water inlet (4) and the water outlet (5) are clamped with pipe plugs (12).

2. A sealable ring- knife cartridge for saturated hydraulic conductivity determination according to claim 1, characterized in that: The inside of the top cover (2) and the bottom cover (3) is provided with a first annular clamping groove (6), and the inner side of the first annular clamping groove (6) is provided with a second annular clamping groove (7).

3. A sealable ring- knife cartridge for saturated hydraulic conductivity determination according to claim 2, characterized in that: The first annular clamping groove (6) and the second annular clamping groove (7) are arranged in a stepped manner, the diameter of the first annular clamping groove (6) is larger than that of the second annular clamping groove (7), and the depth of the first annular clamping groove (6) is shallower than that of the second annular clamping groove (7).

4. A sealable ring- knife cartridge for saturated hydraulic conductivity determination according to claim 3, characterized in that: The first annular clamping groove (6) of the top cover (2) and the bottom cover (3) is clamped with the sealing box body (1).

5. A sealable ring- knife cartridge for saturated hydraulic conductivity determination according to claim 4, characterized in that: The second annular clamping groove (7) of the top cover (2) and the bottom cover (3) is clamped with a ring knife (8), and the top cover (2) is clamped with a sealing ring (9) near the top position.

6. A sealable ring- knife cartridge for saturated hydraulic conductivity determination according to claim 5, characterized in that: The inside of the sealing box body (1) is provided with a clamping groove (10), the inner wall of the sealing box body (1) and the outer wall of the ring knife (8) are matched with each other, the outer wall of the ring knife (8) is provided with a sliding block (11) in an annular array, and the sliding block (11) and the clamping groove (10) are matched with each other.

7. A sealable ring- knife cartridge for saturated hydraulic conductivity determination according to claim 6, characterized in that: The inside of the front of the sealing box body (1) is provided with a heating wire (13), the end of the heating wire (13) is electrically connected with a heating controller (14), and the back of the sealing box body (1) is provided with a cooling water pipe (15).

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