Multifunctional detachable double-ring water seepage test device with full-automatic water injection function

Abstract

The invention provides a full-automatic water injection multifunctional detachable double-ring water seepage test device, comprising: a double-ring cylinder comprising an outer ring cylinder and an inner ring cylinder located in the outer ring cylinder, the bottom of the double-ring cylinder being provided with a pressure relief layer; the water injection adjusting structure comprises an inner ring water injection adjusting chamber located on the inner wall of the inner ring cylinder above the pressure buffering layer and an outer ring water injection adjusting chamber located on the outer wall of the inner ring cylinder, and the bottoms and the peripheries of the inner ring water injection adjusting chamber and the outer ring water injection adjusting chamber are of first net-shaped structures, and the upper portions of the inner ring water injection adjusting chamber and the outer ring water injection adjusting chamber are of sealed structures; a first water level adjusting structure is arranged in the inner ring water injection adjusting chamber, and a second water level adjusting structure is arranged in the outer ring water injection adjusting chamber. Through the arrangement of the inner ring water injection adjusting chamber and the outer ring water injection adjusting chamber, full-automatic water injection is realized, the permeability coefficients of different areas can be efficiently and accurately measured, and errors caused by manual water injection are greatly reduced, so that the test accuracy is improved.

Description

Technical Field

[0001] The present application relates to the technical fields of hydrogeology, soil science and hydraulic engineering, and in particular to a multifunctional detachable double-ring water seepage test device with full-automatic water injection. Background Art

[0002] The permeability coefficient is a key indicator for evaluating aquifer water content, selecting numerical simulation parameters, and calculating groundwater resources. Therefore, accurately determining the permeability coefficient in the field is a crucial task for hydrogeologists. However, since most permeability coefficient measurement instruments currently available on the market use artificial water injection, errors in injection height and volume can be significant. This error is particularly pronounced in areas with significant permeability coefficient variations or low permeability coefficients. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a multifunctional detachable double-ring water seepage test device with fully automatic water injection, so as to solve the problem in the prior art that the permeability coefficient measuring instrument is manually injected with water, resulting in large human errors and inaccurate test results.

[0004] In a first aspect, the present application provides a multifunctional detachable double-ring water seepage test device with full-automatic water injection, comprising: a double-ring cylinder, comprising an outer ring cylinder and an inner ring cylinder located within the outer ring cylinder, wherein a pressure relief layer is provided at the bottom of the double-ring cylinder; The water injection regulating structure includes an inner ring water injection regulating chamber located on the inner wall of the inner ring tube above the pressure relief layer and an outer ring water injection regulating chamber on the outer wall of the inner ring tube. Both the inner ring water injection regulating chamber and the outer ring water injection regulating chamber have a first mesh structure at the bottom and around and a sealing structure at the top. A first water level regulating structure is provided in the inner ring water injection regulating chamber, and a second water level regulating structure is provided in the outer ring water injection regulating chamber.

[0005] In one embodiment, the first water level regulating structure includes a water-permeable inner ring piston chamber located in the inner ring water injection regulating chamber, an inner ring water-stopping ball located in the inner ring piston chamber, an inner ring water-stopping pipe located at the upper part of the inner ring piston chamber, and a first automatic water supply mechanism connected to the inner ring water-stopping pipe, wherein the diameter of the inner ring water-stopping ball is the same as the diameter of the inner ring water-stopping pipe; and / or The second water level regulating structure includes a water-permeable outer ring piston chamber located in the outer ring water injection regulating chamber, an outer ring water stop ball located in the outer ring piston chamber, an outer ring water stop pipe located on the upper part of the outer ring piston chamber, and a second automatic water supply mechanism connected to the outer ring water stop pipe. The diameter of the outer ring water stop ball is the same as the diameter of the outer ring water stop pipe.

[0006] In one embodiment, the inner ring piston chamber is a hollow conical structure with a small upper portion and a large lower portion, the upper portion of the inner ring piston chamber is fixed to the inner ring water stop pipe, and the upper diameter of the inner ring piston chamber is the same as the diameter of the inner ring water stop pipe, and the lower portion of the inner ring piston chamber is fixed to the bottom of the inner ring water injection regulating chamber; and / or The outer ring piston chamber is a hollow conical structure with a small top and a large bottom. The upper part of the outer ring piston chamber is fixed to the outer ring water stop pipe, and the upper diameter of the outer ring piston chamber is the same as the diameter of the outer ring water stop pipe. The lower part of the outer ring piston chamber is fixed to the bottom of the outer ring water injection regulating chamber.

[0007] In one embodiment, an outer ring water injection line is provided on the outer ring cylinder, and the outer ring water injection line is flush with the connection between the outer ring piston chamber and the outer ring water stop pipe; and / or An inner ring water injection line is provided on the inner ring cylinder, and the inner ring water injection line is flush with the connection between the inner ring piston chamber and the inner ring water stop pipe.

[0008] In one embodiment, a detachable base assembly is provided at the bottom of the double-ring cylinder, and the pressure-relief layer is located inside the base assembly, and the base assembly includes an outer ring base and an inner ring base sleeved inside the outer ring base; the pressure-relief layer includes a first filter screen located at the upper inner part of the outer ring base and the inner ring base, a second filter screen located at the middle and lower inner part of the outer ring base and the inner ring base, and a filler layer located between the first filter screen and the second filter screen; the outer ring base and the inner ring base are fixedly connected by the first filter screen and the second filter screen.

[0009] In one embodiment, the outer ring base is provided with an outer ring embedded end below the junction of the first filter screen and the outer ring base; and / or The inner ring base is located below the junction of the first filter screen and the inner ring base as an inner ring embedded end.

[0010] In one embodiment, a plurality of earrings are evenly distributed on the periphery of the outer ring base in the middle of the packing layer, and each earring is provided with a spirit level.

[0011] In one embodiment, the first automatic water supply mechanism includes a first water tank, an inner ring external water pipe and an inner ring water injection pipe connected to the first water tank in sequence, the inner ring water injection pipe is connected to the inner ring water stop pipe, and a first valve is provided at a position on the first water tank connected to the inner ring external water pipe; and / or The second automatic water supply mechanism includes a second water tank, an outer ring external water pipe and an outer ring water injection pipe connected to the second water tank in sequence, the outer ring water injection pipe is connected to the outer ring water stop pipe, and a second valve is provided at the position connected to the outer ring external water pipe on the second water tank.

[0012] In one embodiment, a liftable bracket is provided at the lower portion of the first water tank and the second water tank.

[0013] In one embodiment, the bracket includes a table top and a plurality of table legs located at the bottom of the table top, each of the table legs includes an upper support rod located at the bottom of the table top and a lower support rod located below the upper support rod, the upper support rod and the lower support rod are connected by a hollow adjustment knob, and a foot pad is provided at the bottom of the lower support rod; a level is provided inside the table top.

[0014] This application uses a first water level regulating structure provided in the inner ring water injection regulating chamber and a second water level regulating structure provided in the outer ring water injection regulating chamber to automatically adjust the levels in the inner ring tube and the outer ring tube to their respective water injection lines, and to be flush. The total water injection volume in the inner ring tube during the observation period and the area of ​​the cross section of the inner ring tube can be used to calculate the permeability coefficient of the test layer. The present invention reduces the water flow disturbance between the outer ring tube and the inner ring tube. In addition, the pressure relief layer effectively reduces the impact of the water flow on the bottom of the test pit. All of the above reduce the test error. By setting the inner ring water injection regulating chamber and the outer ring water injection regulating chamber, fully automatic water injection is achieved, and the permeability coefficient of different areas can be measured efficiently and accurately, which greatly reduces the error caused by artificial water injection, thereby improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings of the embodiments. Obviously, the drawings described below only relate to some embodiments of the present application and are not intended to limit the present application. Figure 1 This is a structural diagram of the double-ring cylinder and base assembly of an embodiment of the present application; Figure 2 This is a structural diagram of a double-ring drum according to an embodiment of the present application; Figure 3 This is a structural diagram of the base assembly of an embodiment of the present application; Figure 4 This is a structural diagram of the inner ring cylinder, outer ring water injection regulating chamber and inner ring water injection regulating chamber in an embodiment of the present application; Figure 5 This is a longitudinal cross-sectional view of the double-ring cylinder and base assembly according to an embodiment of the present application; Figure 6 This is a structural diagram of the water tank and bracket of the embodiment of the present application Figure 7 This is a structural diagram of the bracket according to an embodiment of the present application.

[0016] Description of reference numerals: 1-outer ring, 3-bracket, 4-inner ring, 5-base assembly, 6-earring, 8-second filter, 9-packing layer, 10-first filter, 14-outer ring water injection line, 15-inner ring water injection line, 16-outer ring water injection pipe, 17-inner ring water injection pipe, 18-outer ring water injection regulating chamber, 19-inner ring water injection regulating chamber, 20-outer ring water stop ball, 21-inner ring water stop ball, 22-water tank one, 2 3-Water tank two, 24-Water tank three, 25-Water tank four, 26-Valve one, 27-Valve two, 28-Valve three, 29-Valve four, 31-Desktop, 32-Level, 33-Upper support rod, 34-Adjustment knob, 35-Lower support rod, 36-Outer ring base, 37-Inner ring base, 38-Outer ring water stop pipe, 39-Outer ring piston chamber, 40-Inner ring water stop pipe, 41-Inner ring piston chamber. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0018] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a unique orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0019] In the application, the word "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, known structures and processes are not described in detail to avoid obscuring the description of the present application with unnecessary detail. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles disclosed herein.

[0020] See Figure 1 and Figure 4 The present invention provides a multifunctional detachable double-ring water seepage test device with automatic water injection, comprising: The double-ring cylinder comprises an outer ring cylinder 1 and an inner ring cylinder 4 located inside the outer ring cylinder 1, wherein a pressure relief layer is provided at the bottom of the double-ring cylinder; The water injection regulating structure includes an inner ring water injection regulating chamber 19 located on the inner wall of the inner ring tube 4 above the pressure relief layer and an outer ring water injection regulating chamber 18 on the outer wall of the inner ring tube 4. The inner ring water injection regulating chamber 19 and the outer ring water injection regulating chamber 18 both have a first mesh structure at the bottom and all around and a sealed structure at the top. A first water level regulating structure is provided in the inner ring water injection regulating chamber 19, and a second water level regulating structure is provided in the outer ring water injection regulating chamber 18.

[0021] Exemplarily, the outer ring water injection regulating chamber 18 is made of a hollow hard plastic material, with a first water-permeable mesh structure at the bottom and surrounding areas, and a sealed structure that is water-proof at the top; the inner ring water injection regulating chamber 19 is made of a hollow hard plastic material, with a first water-permeable mesh structure at the bottom and surrounding areas, and a sealed structure that is water-proof at the top.

[0022] In the present invention, by means of the first water level regulating structure provided in the inner ring water injection regulating chamber 19 and the second water level regulating structure provided in the outer ring water injection regulating chamber 18, the levels in the inner ring tube 4 and the outer ring tube 1 can be automatically adjusted to their respective water injection lines and made flush, and the total water injection volume in the inner ring tube 4 during the observation period and the cross-sectional area of ​​the inner ring tube 4 can be used to calculate the permeability coefficient of the test layer. The present invention reduces the water flow disturbance between the outer ring tube 1 and the inner ring tube 4. In addition, the pressure relief layer effectively reduces the impact of the water flow on the bottom of the test pit, all of which reduce the test error; by means of the inner ring water injection regulating chamber 19 and the outer ring water injection regulating chamber 18, fully automatic water injection is achieved, and the permeability coefficients of different areas can be measured efficiently and accurately, which greatly reduces the error caused by artificial water injection, thereby improving the accuracy of the test.

[0023] See Figure 5 In some embodiments, the first water level regulating structure includes a water-permeable inner ring piston chamber 41 located in the inner ring water injection regulating chamber 19, an inner ring water stop ball 21 located in the inner ring piston chamber 41, an inner ring water stop pipe 40 located on the upper part of the inner ring piston chamber 41, and a first automatic water supply mechanism connected to the inner ring water stop pipe 40, and the diameter of the inner ring water stop ball 21 is the same as the diameter of the inner ring water stop pipe 40.

[0024] Furthermore, the inner ring piston chamber 41 is a hollow conical structure with a small upper part and a large lower part. The upper part of the inner ring piston chamber 41 is fixed to the inner ring water stop pipe 40, and the upper diameter of the inner ring piston chamber 41 is the same as the diameter of the inner ring water stop pipe 40. The lower part of the inner ring piston chamber 41 is fixed to the bottom of the inner ring water injection regulating chamber 19.

[0025] Exemplarily, the inner ring piston chamber 41 is made of a hard transparent plastic material, and the inner ring piston chamber 41 is a water-permeable third mesh structure. The bottom of the hollow conical structure of the inner ring piston chamber 41 is flush with and fixedly connected to the bottom of the inner ring water injection regulating chamber 19, and the upper part of the hollow conical structure of the inner ring piston chamber 41 is fixedly connected to the bottom of the inner ring water stop pipe 40, and the top diameter of the hollow conical structure is consistent with the diameter of the inner ring water stop pipe 40; the inner ring water stop ball 21 is a hollow sphere made of a lightweight and floatable plastic material, and its diameter is consistent with the diameter of the inner ring water stop pipe 40; the inner ring water stop pipe 40 is a cylinder made of a hard material with upper and lower openings and sealed on all sides.

[0026] See Figure 5 In some embodiments, the second water level regulating structure includes a water-permeable outer ring piston chamber 39 located in the outer ring water injection regulating chamber 18, an outer ring water stop ball 20 located in the outer ring piston chamber 39, an outer ring water stop pipe 38 located on the upper part of the outer ring piston chamber 39, and a second automatic water supply mechanism connected to the outer ring water stop pipe 38, and the diameter of the outer ring water stop ball 20 is the same as the diameter of the outer ring water stop pipe 38.

[0027] Furthermore, the outer ring piston chamber 39 is a hollow conical structure with a small upper part and a large lower part. The upper part of the outer ring piston chamber 39 is fixed to the outer ring water stop pipe 38, and the upper diameter of the outer ring piston chamber 39 is the same as the diameter of the outer ring water stop pipe 38. The lower part of the outer ring piston chamber 39 is fixed to the bottom of the outer ring water injection regulating chamber 18.

[0028] Exemplarily, the outer ring piston chamber 39 is made of a hard transparent plastic material, and the outer ring piston chamber 39 is a water-permeable second mesh structure. The bottom of the hollow conical structure of the outer ring piston chamber 39 is flush with and fixedly connected to the bottom of the outer ring water injection regulating chamber 18, and the upper part of the hollow conical structure of the outer ring piston chamber 39 is fixedly connected to the bottom of the outer ring water stop pipe 38, and the top diameter of the hollow conical structure is consistent with the diameter of the outer ring water stop pipe 38; the outer ring water stop ball 20 is a hollow sphere made of a lightweight and floatable plastic material, and its diameter is consistent with the diameter of the outer ring water stop pipe 38; the outer ring water stop pipe 38 is a cylinder made of a hard material with upper and lower openings and sealed on all sides.

[0029] See Figure 1 and Figure 2 Furthermore, an outer ring water injection line 14 is provided on the outer ring cylinder 1 , and the outer ring water injection line 14 is flush with the connection between the outer ring piston chamber 39 and the outer ring water stop pipe 38 .

[0030] See Figure 3 and Figure 5 Furthermore, an inner ring water injection line 15 is provided on the inner ring cylinder 4 , and the inner ring water injection line 15 is flush with the connection between the inner ring piston chamber 41 and the inner ring water stop pipe 40 .

[0031] Furthermore, a detachable base assembly 5 is provided at the bottom of the double-ring cylinder, and the pressure relief layer is located inside the base assembly 5, and the base assembly 5 includes an outer ring base 36 and an inner ring base 37 sleeved inside the outer ring base 36; the pressure relief layer includes a first filter screen 10 located at the upper inner part of the outer ring base 36 and the inner ring base 37, a second filter screen 8 located at the middle and lower inner part of the outer ring base 36 and the inner ring base 37, and a filler layer 9 located between the first filter screen 10 and the second filter screen 8; the outer ring base 36 and the inner ring base 37 are fixedly connected by the first filter screen 10 and the second filter screen 8.

[0032] Furthermore, the outer ring base 36 is an outer ring embedded end below the connection between the first filter screen 10 and the outer ring base 36 ; the inner ring base 37 is an inner ring embedded end below the connection between the first filter screen 10 and the inner ring base 37 .

[0033] Furthermore, a plurality of earrings 6 are evenly distributed on the periphery of the outer ring base 36 in the middle of the packing layer 9 , and each earring 6 is provided with a spirit level.

[0034] Exemplarily, the outer ring base 36 is a stainless steel ring with a diameter of 0.50m, a height of 0.10m, a thickness of 3mm, and a 2cm internal thread at the top. The inner ring base 37 is a stainless steel ring with a diameter of 0.25m, a height of 0.10m, and a thickness of 3mm. The outer ring base 36 and the inner ring base 37 are fixedly connected by the second filter screen 8 and the first filter screen 10, forming a hollow double ring. The second filter screen 8 is 5cm from the bottom of the outer ring base 36 and the inner ring base 37, and the first filter screen 10 and the second filter screen 8 are 2cm apart. They are made of mesh stainless steel. The outer ring base 36 has an outer ring embedded end below the junction of the second filter screen 8 and the outer ring base 36, and the inner ring base 37 has an inner ring embedded end below the junction of the second filter screen 8 and the inner ring base 37. A buffer layer is provided between the second filter screen 8 and the first filter screen 10. The buffer layer is made of lightweight plastic and is filled with irregular shapes with a volume of less than 2 cubic centimeters. Three earrings 6 are fixedly connected in a triangular relationship to an outer ring base 36, located at the center of the packing layer 9 and made of stainless steel. The spirit level is embedded in the top of the earring 6. The upper portion of the level is made of transparent, impact-resistant plastic, with a level bubble placed in the middle.

[0035] As another example, the outer ring tube 1 is a circular ring made of transparent, high-hardness and lightweight plastic with a diameter of 0.5m, and a 2cm external thread at the bottom, which is compatible with and threadedly connected to the internal thread on the upper part of the outer ring base 36, and is detachable. The outer ring tube 1 is marked with a circular outer ring water injection line 14 10cm above the bottom; the inner ring tube 4 is a circular ring made of transparent, high-hardness and lightweight plastic with a diameter of 0.25m, and a 2cm external thread at the bottom, which can be rotatably sealed with the internal thread on the upper part of the inner ring base 37, and is detachable; the inner ring tube 4 is marked with a circular inner ring water injection line 15 10cm from the bottom; the outer ring water injection regulating chamber 18 is fixedly connected to the outside of the side wall of the inner ring tube 4, and the inner ring water injection regulating chamber 19 is fixedly connected to the inside of the side wall of the inner ring tube 4.

[0036] See Figure 6 Furthermore, the first automatic water supply mechanism includes a first water tank, an inner ring external water pipe and an inner ring water injection pipe 17 connected to the first water tank in sequence, the inner ring water injection pipe 17 is connected to the inner ring water stop pipe 40, and a first valve is provided at a position on the first water tank connected to the inner ring external water pipe.

[0037] Exemplarily, the upper portion of the inner ring water stop pipe 40 that is higher than the inner ring water injection regulating chamber 19 is threaded and is used for threaded connection with the inner ring water injection pipe 17 .

[0038] Furthermore, the second automatic water supply mechanism includes a second water tank, an outer ring external water pipe and an outer ring water injection pipe 16 connected to the second water tank in sequence, the outer ring water injection pipe 16 is connected to the outer ring water stop pipe 38, and a second valve is provided at the position on the second water tank connected to the outer ring external water pipe.

[0039] Exemplarily, the upper portion of the outer ring water stop pipe 38 that is higher than the outer ring water injection regulating chamber 18 is threaded and is used for threaded connection with the outer ring water injection pipe 16 .

[0040] See Figure 6 and Figure 7 For example, the first water tank and the second water tank are composed of four water tanks of different sizes, namely water tank 1 22, water tank 2 23, water tank 3 24, and water tank 4 25. Each water tank is made of transparent plastic material and is marked with a reverse volume scale on the front of each water tank. Each water tank has a corresponding water filling port on the top, which can be sealed; the lower parts of water tank 1 22, water tank 2 23, water tank 3 24, and water tank 4 25 are respectively connected to external valve 1 26, valve 2 27, valve 3 28, and valve 4 29; the external valve 1 26, valve 2 27, valve 3 28, and valve 4 29 are spiral valves that can adjust the water output; users can freely connect the outer ring water injection pipe 16 and the inner ring water injection pipe 17 with valve 1 26, valve 2 27, valve 3 28, and valve 4 29 according to actual needs.

[0041] Furthermore, a liftable bracket 3 is provided at the lower portion of the first water tank and the second water tank.

[0042] Furthermore, the bracket 3 includes a table top 31 and a plurality of table legs located at the bottom of the table top 31, each of the table legs includes an upper support rod 33 located at the bottom of the table top 31 and a lower support rod 35 located below the upper support rod 33, the upper support rod 33 and the lower support rod 35 are connected by a hollow adjustment knob 34, and a foot pad is provided at the bottom of the lower support rod 35; a level 32 is provided inside the table top 31.

[0043] Exemplarily, the bracket 3 is composed of table legs and a table top 31, and the table top 31 has a level 32 and four threaded holes inside; the table top 31 is a rectangular parallelepiped and is made of lightweight plastic; the level 32 is embedded in one side of the table top 31, and the upper part is made of transparent plastic; the four threaded holes are respectively located at the four corners of the table top 31, with an open bottom and a closed top; the table legs are composed of an upper support rod 33, an adjustment knob 34, a lower support rod 35 and a foot pad; the top and bottom of the upper support rod 33 are both threaded and are made of lightweight plastic; the upper support rod 33 is connected to the threaded hole of the table top 31 through the top thread and is detachable; the top of the lower support rod 35 is a threaded structure, and the lower part is fixedly connected to the foot pad; the foot pad is made of a truncated cone-shaped rubber material; the adjustment knob 34 is a hollow internal thread structure and is made of lightweight plastic; the lower support rod 35 and the upper support rod 33 are connected through the adjustment knob 34 and can be adjusted in height.

[0044] The working principle of the device of the present invention is as follows: when the water level in the inner ring tube 4 is lower than the inner ring water filling line 15, the inner ring water stop ball 21 moves downward along the inner ring piston chamber 41, and the water in the corresponding water tank enters the inner ring water stop pipe 40 along the inner ring external water pipe and enters the inner ring tube 4. When the water level in the inner ring tube 4 is flush with the inner ring water filling line 15, the inner ring water stop ball 21 enters the inner ring water stop pipe 40, thereby preventing water from flowing into the inner ring tube 4, and thus the water level of the inner ring tube 4 is always maintained at the inner ring water filling line 15. The water injection principle of the outer ring tube 1 is consistent with that of the inner ring tube 4, so that the water levels of the inner ring tube 4 and the outer ring tube 1 are always consistent; by observing the total water injection amount in the inner ring tube 4 during the time period, and based on the area of ​​the cross section of the inner ring tube 4 and the amount of water injected into the inner ring per unit time, the permeability coefficient of the test layer can be calculated.

[0045] The outer ring base 36 of the base assembly 5 of the device of the invention has earrings 6 and a spirit level added to its periphery. By hammering the earrings 6, the embedded end of the base assembly 5 can better enter the test layer, reducing the water flow disturbance between the outer ring tube 1 and the inner ring tube 4. At the same time, the spirit level can effectively keep the base assembly 5 horizontal, thereby reducing the tilt of the water surface. In addition, the filler layer 9 in the middle of the base assembly 5 is filled with irregular plastic materials, which can effectively reduce the impact of water flow on the bottom of the test pit. All of the above reduce the test error. On the other hand, by setting up the inner ring water injection regulating chamber 19 and the outer ring water injection regulating chamber 18, fully automatic water injection is achieved, which greatly reduces the error caused by manual water injection, thereby improving the test accuracy. At the same time, the experimental device adds a water tank and a bracket 3, making the test more convenient, and water tanks of different volumes can be applied in multiple scenarios, greatly improving the test efficiency. The entire test device is made of detachable devices and lightweight plastics, making the test device lighter and easier to carry, and has a good use effect in measuring the permeability coefficient of the covering layer.

[0046] The device of the present invention can effectively measure the permeability coefficient of the covering layer and provide important data for research in hydrogeology, environmental geology and other aspects. The device can efficiently and accurately measure the permeability coefficient of different areas through fully automatic adjustable water injection. At the same time, the device is provided with multiple spirit levels and earrings 6. On the one hand, it can maintain the balance of the double-ring water seepage test and reduce human errors. At the same time, the earrings 6 can facilitate the double-ring test to effectively reach the double-ring test penetration depth, avoiding the test error caused by lateral leakage of water in the double rings.

[0047] The operating method of the device of the present invention comprises: Step 1: The user digs a circular pit with a diameter of 0.6m according to the measured depth of the cover layer, places the base assembly 5 in the pit, hammers the earrings 6 so that the outer and inner buried ends are inserted into the soil, and adjusts the level bubble in the spirit level to the center; Step 2: Connect the outer ring tube 1 and the inner ring tube 4 to the outer ring base 36 and the inner ring base 37 respectively, connect the outer ring external water pipe to the outer ring water injection pipe 16, connect the inner ring external water pipe to the inner ring water injection pipe 17, and fill the gap between the outer ring and the circular deep pit with the excavated original soil; Step 3, assemble the bracket 3, first connect the four table legs to the four threaded holes of the table top 31 respectively, and adjust the adjustment knobs 34 of different table legs to make the level bubble of the level gauge 32 of the table top 31 be centered; place the water tank assembly consisting of water tank 1 22, water tank 2 23, water tank 3 24 and water tank 4 25 on the table top 31 of the bracket 3, roughly judge the size of the permeability coefficient according to the soil properties of the test layer, and choose to connect the outer ring external water injection pipe to valve 1 26, valve 2 27, valve 3 28, or valve 4 29 of one of water tank 1 22, water tank 2 23, water tank 3 24 or water tank 4 25, and connect the inner ring external water pipe to the inner ring water injection pipe 17 as described above. Under normal circumstances, the volume of the water tank connected by the inner ring external water pipe is smaller than the volume of the water tank connected by the outer ring external water pipe; open the water inlet of the water tank connected by the outer ring external water pipe and the inner ring external water pipe, close the corresponding water tank valve, and fill water to the 0 scale line; Step 4: Quickly fill the outer ring tube 1 and the inner ring tube 4 with water until the water level in the outer ring tube 1 is flush with the outer ring water filling line 14 and the water level in the inner ring tube 4 is flush with the inner ring water filling line 15. Open the valves of the corresponding water tanks connected to the outer ring external water pipe and the inner ring external water pipe; Step 5, test record and operation, the test intervals are 5min, 10min, 15min, 20min and 30min, observe the water injection volume of the inner ring external water pipe connected to the water tank, and record the total water injection volume of the inner ring tube 4 in each time period. During the test, water should be injected into the water tank connected to the outer ring external water pipe and the inner ring external water pipe through the water injection port according to actual conditions; the test is terminated when the total water injection volume in the inner ring tube 4 differs by less than 5% in three consecutive intervals. The last water injection volume divided by the product of the cross-sectional area of ​​the inner ring tube 4 and the time period is the permeability coefficient of this test layer; Step 6, disassemble the test device, disconnect the outer ring external water pipe and the inner ring external water pipe from the connection with the outer ring water injection pipe 16 and the inner ring water injection pipe 17 respectively, drain all the corresponding water tanks, remove the outer ring external water pipe and the inner ring external water pipe and the corresponding water tank from the connection, cover the water tank water injection port cover, and disassemble the table top 31 from the table legs; pull the double ring tube out of the test pit by shaking the outer ring tube 1 of the double ring tube, and separate the outer ring tube 1 and the inner ring tube 4 from the outer ring base 36 and the inner ring base 37 respectively, recycle the test device, and complete this test.

[0048] It can be understood that both the outer ring external water pipe and the inner ring external water pipe can be plastic hoses.

[0049] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0050] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

Claims

1. A multifunctional detachable double-ring water seepage test device with full automatic water injection, characterized in that: include: A double-ring cylinder, comprising an outer ring cylinder and an inner ring cylinder located inside the outer ring cylinder, wherein a pressure relief layer is provided at the bottom of the double-ring cylinder; The water injection regulating structure includes an inner ring water injection regulating chamber located on the inner wall of the inner ring tube above the pressure relief layer and an outer ring water injection regulating chamber on the outer wall of the inner ring tube. Both the inner ring water injection regulating chamber and the outer ring water injection regulating chamber have a first mesh structure at the bottom and around and a sealing structure at the top. A first water level regulating structure is provided in the inner ring water injection regulating chamber, and a second water level regulating structure is provided in the outer ring water injection regulating chamber.

2. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 1 is characterized in that: The first water level regulating structure includes a water-permeable inner ring piston chamber located in the inner ring water injection regulating chamber, an inner ring water-stopping ball located in the inner ring piston chamber, an inner ring water-stopping pipe located at the upper part of the inner ring piston chamber, and a first automatic water supply mechanism connected to the inner ring water-stopping pipe, wherein the diameter of the inner ring water-stopping ball is the same as the diameter of the inner ring water-stopping pipe; and / or The second water level regulating structure includes a water-permeable outer ring piston chamber located in the outer ring water injection regulating chamber, an outer ring water stop ball located in the outer ring piston chamber, an outer ring water stop pipe located on the upper part of the outer ring piston chamber, and a second automatic water supply mechanism connected to the outer ring water stop pipe. The diameter of the outer ring water stop ball is the same as the diameter of the outer ring water stop pipe.

3. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 2, characterized in that: The inner ring piston chamber is a hollow truncated cone structure with a small upper portion and a large lower portion. The upper portion of the inner ring piston chamber is fixed to the inner ring water stop pipe, and the upper diameter of the inner ring piston chamber is the same as the diameter of the inner ring water stop pipe. The lower portion of the inner ring piston chamber is fixed to the bottom of the inner ring water injection regulating chamber; and / or The outer ring piston chamber is a hollow conical structure with a small top and a large bottom. The upper part of the outer ring piston chamber is fixed to the outer ring water stop pipe, and the upper diameter of the outer ring piston chamber is the same as the diameter of the outer ring water stop pipe. The lower part of the outer ring piston chamber is fixed to the bottom of the outer ring water injection regulating chamber.

4. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 2, characterized in that: An outer ring water injection line is provided on the outer ring cylinder, and the outer ring water injection line is flush with the connection between the outer ring piston chamber and the outer ring water stop pipe; and / or An inner ring water injection line is provided on the inner ring cylinder, and the inner ring water injection line is flush with the connection between the inner ring piston chamber and the inner ring water stop pipe.

5. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 1, characterized in that: A detachable base assembly is provided at the bottom of the double-ring cylinder, and the pressure-relief layer is located inside the base assembly. The base assembly includes an outer ring base and an inner ring base sleeved inside the outer ring base; the pressure-relief layer includes a first filter screen located at the upper inner part of the outer ring base and the inner ring base, a second filter screen located at the middle and lower inner part of the outer ring base and the inner ring base, and a filler layer located between the first filter screen and the second filter screen; the outer ring base and the inner ring base are fixedly connected by the first filter screen and the second filter screen.

6. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 5, characterized in that: The outer ring base is located below the junction of the first filter screen and the outer ring base as the outer ring embedded end; and / or The inner ring base is located below the junction of the first filter screen and the inner ring base as an inner ring embedded end.

7. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 5, characterized in that: A plurality of earrings are evenly distributed on the periphery of the outer ring base in the middle of the packing layer, and each earring is provided with a spirit level.

8. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 1, characterized in that: The first automatic water supply mechanism includes a first water tank, an inner ring external water pipe and an inner ring water injection pipe connected to the first water tank in sequence, the inner ring water injection pipe is connected to the inner ring water stop pipe, and a first valve is provided at a position on the first water tank connected to the inner ring external water pipe; and / or The second automatic water supply mechanism includes a second water tank, an outer ring external water pipe and an outer ring water injection pipe connected to the second water tank in sequence, the outer ring water injection pipe is connected to the outer ring water stop pipe, and a second valve is provided at the position connected to the outer ring external water pipe on the second water tank.

9. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 1, characterized in that: A liftable bracket is provided at the lower part of the first water tank and the second water tank.

10. The multifunctional detachable double-ring water seepage test device for full-automatic water injection according to claim 1, characterized in that: The bracket includes a table top and a plurality of table legs located at the bottom of the table top, each of the table legs includes an upper support rod located at the bottom of the table top and a lower support rod located below the upper support rod, the upper support rod and the lower support rod are connected by a hollow adjustment knob, and a foot pad is provided at the bottom of the lower support rod; a level is provided inside the table top.

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