Physical similar simulation experiment device for borehole flow rate

Abstract

The utility model discloses a borehole flow rate physical similar simulation experiment device, including water supply device and with the water supply device connection's sand box, and the sand box includes the bottom open box body formed by the sticking of acrylic transparent plate, and the high fine mesh screen of vertical direction is embedded in the close box body one side, and the clay layer, fine sand layer, clay layer are laid in the box body inside from bottom to top in proper order, and the high fine mesh screen is placed in the clay layer and fine sand layer and forms the borehole, and the borehole water outlet a is arranged in the borehole close box body one side, and the water outlet b is arranged in the same height place chiseling hole at the other end of fine sand layer. The utility model discloses a layered structure's transparent sand box, high fine mesh screen etc. design, has realized the direct observation and accurate control to the fluid flow in the borehole. The scale design and water inlet protection measure of its water supply device have further improved the precision and operability of experiment.

Description

Technical Field

[0001] This utility model belongs to the field of groundwater monitoring technology, specifically a borehole flow velocity physical similarity simulation experimental device. Background Technology

[0002] Changes in groundwater dynamics are crucial to safe coal mining and ecological environmental protection. Conventional groundwater monitoring methods primarily involve placing water pressure sensors in boreholes to monitor groundwater levels. While this method can reflect dynamic changes in groundwater levels, it is insufficient for monitoring groundwater flow velocity within the borehole. Flow velocity is a critical parameter reflecting groundwater dynamics and is significant for mine water inrush early warning and groundwater pollution control. Therefore, developing a physical similarity simulation experimental device that can accurately simulate borehole flow velocity is of great importance for gaining a deeper understanding of groundwater flow patterns and improving groundwater monitoring technology.

[0003] The borehole flow velocity physical similarity simulation experimental device is mainly used to simulate the flow patterns of fluids within boreholes, and to study the infiltration, transport, and velocity changes of fluids within the borehole. This device is designed to address complex fluid behaviors that are difficult to directly observe and control in practical engineering, providing theoretical basis and experimental data support for the design, optimization, and safe operation of borehole projects. Traditional experimental devices are often structurally complex and difficult to intuitively demonstrate fluid motion patterns, have insufficient water velocity monitoring, and limit the accuracy and repeatability of experimental results. Utility Model Content

[0004] The purpose of this invention is to provide a physical similarity simulation experimental device for borehole flow velocity, which solves the problem of insufficient monitoring of groundwater flow velocity in boreholes in the existing technology.

[0005] The technical solution adopted by this utility model is: a physical similarity simulation experimental device for borehole flow velocity, including a water supply device and a sand box connected to each other. The sand box includes a box body with an open bottom formed by pasting acrylic transparent plates. A vertical high-fine-pore screen is pre-embedded on one side of the box body. Inside the box body, a clay layer, a fine sand layer, and another clay layer are laid sequentially from bottom to top. The high-fine-pore screen is placed in the clay layer and the fine sand layer to form a borehole. A borehole outlet a is drilled at 1 / 2 the thickness of the fine sand layer on the side of the borehole close to the box body, and a borehole outlet b is drilled at the same height on the other end of the fine sand layer.

[0006] Furthermore, the water supply device includes a glass bottle with graduations, a hollow tube passing through the top cover of the glass bottle, a water inlet on the top cover, and a water inlet cap.

[0007] Furthermore, a box body connector is installed by drilling a hole at 1 / 2 the thickness of the fine sand layer on the side of the box body away from the drill hole. A water bottle connector is installed at the bottom of the glass bottle. The box body and the glass bottle are connected through the box body connector, the water pipe and the water bottle connector. The water pipe connects the water bottle connector and the box body connector.

[0008] Furthermore, the aperture of the high-fineness screen is 0.1~0.2mm; the height of the high-fineness screen 7 is consistent with the total height of the fine sand layer and the two clay layers.

[0009] Furthermore, the thickness of the clay layer is 10 cm, and the thickness of the fine sand layer is 10 cm.

[0010] Furthermore, the housing connector is located in the middle of the housing.

[0011] Furthermore, the drilled water outlet a is located at 1 / 4 of the tank width, and the water outlet b is located at 3 / 4 of the tank width.

[0012] Furthermore, the hollow tube is movably connected to the top cover, allowing the height of the hollow tube to be adjusted according to water pressure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The sand box is made of transparent acrylic sheet, allowing for direct observation of the internal fluid movement. The interior is layered with clay and fine sand to simulate fluid infiltration and movement characteristics under different geological conditions. This design is helpful for studying the variation patterns of borehole flow velocity in complex geological environments.

[0015] 2. A fine-mesh screen is placed between the clay layer and the fine sand layer to form a borehole. This structure can simulate the sealing and permeability of boreholes in actual engineering and helps to study the flow characteristics of fluids in boreholes.

[0016] 3. Drill outlets a and b were installed in the fine sand layer to monitor the fluid velocity and pressure changes at different locations, thereby providing data support for analyzing the flow patterns of the fluid inside the borehole.

[0017] This invention's borehole flow velocity physical similarity simulation experimental device, through its layered transparent sand box and high-fine-mesh sieve design, enables direct observation and precise control of fluid flow inside the borehole. The scale design of its water supply device and the protection measures for the water inlet further improve the accuracy and operability of the experiment. This device is not only suitable for teaching and research but also provides important reference for practical engineering, exhibiting significant economic and social benefits. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the borehole flow velocity physical similarity simulation experimental device of this utility model.

[0020] Figure 2 for Figure 1 Top view.

[0021] Figure 3 for Figure 1 Section I-I.

[0022] Figure 4 for Figure 1 Section II-II.

[0023] In the diagram: 1. Box body, 2. Clay layer, 3. Fine sand layer, 4. Drilled water outlet a, 5. Water outlet b, 6. Drill hole, 7. Fine mesh screen, 8. Box body connector, 9. Water pipe, 10. Glass bottle, 11. Top cover, 12. Bottom, 13. Water bottle connector, 15. Hollow tube, 16. Water inlet, 17. Water inlet cap. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1

[0026] like Figures 1-2 As shown, the drilling flow velocity physical similarity simulation experimental device of this utility model includes a water supply device and a sand box connected to each other. The sand box includes a box body 1 with an open bottom formed by bonding acrylic transparent plates. A vertical high-fine-pore screen 7 is pre-embedded on one side of the box body 1. Inside the box body 1, a clay layer 2, a fine sand layer 3, and another clay layer 2 are laid in sequence from bottom to top. The high-fine-pore screen 7 is placed in the clay layer and the fine sand layer to form a drilling hole 6. A drilling outlet a4 is drilled at 1 / 2 the thickness of the fine sand layer 3 on one side of the drilling hole 6 close to the box body 1, and a water outlet b5 is drilled at the same height on the other end of the fine sand layer 3.

[0027] Example 2

[0028] The drilling flow velocity physical similarity simulation experimental device of this utility model, such as Figure 1-4As shown, it includes a water supply device and a sand box connected to each other. The sand box includes a box body 1 with an open bottom formed by bonding acrylic transparent panels. A vertical fine-pore screen 7 is pre-embedded on one side of the box body 1. Inside the box body 1, a clay layer 2, a fine sand layer 3, and another clay layer 2 are laid in sequence from bottom to top. The fine-pore screen 7 is placed in the clay layer and the fine sand layer to form a hole 6.

[0029] Drill a hole at the location where the fine sand layer 3 is half the thickness of the hole 6 is close to the side of the tank body 1 to set the water outlet a4, and drill a hole at the same height at the other end of the fine sand layer 3 to set the water outlet b5.

[0030] The water supply device includes a glass bottle 10, and the glass bottle 10 is provided with a scale 14.

[0031] A hollow tube 15 is threaded through the top cover 15 of the glass bottle 10. The top cover 15 is also provided with a water inlet 16, and a water inlet cap 17 is provided on the water inlet 16.

[0032] A hole is drilled at 1 / 2 the thickness of the fine sand layer 3 on the side of the box body 1 away from the drill hole 6 to set the box body connector 8, and a water bottle connector 13 is provided at the bottom of the glass bottle 10.

[0033] The box and the glass bottle are connected by a box connector 8, a water pipe 9 and a water bottle connector 13. The water pipe 9 connects the water bottle connector 13 to the box connector 8.

[0034] The aperture of the fine-mesh screen 7 is 0.1~0.2mm;

[0035] The height of the fine mesh screen 7 is consistent with the total height of the fine sand layer 3 and the two clay layers 2.

[0036] Example 3

[0037] The drilling flow velocity physical similarity simulation experimental device of this utility model, such as Figure 1-4 As shown, it includes a water supply device and a sand box connected to each other. The sand box includes a box body 1 with an open bottom formed by bonding acrylic transparent panels. A vertical fine-pore screen 7 is pre-embedded on one side of the box body 1. Inside the box body 1, a clay layer 2, a fine sand layer 3, and another clay layer 2 are laid in sequence from bottom to top. The fine-pore screen 7 is placed in the clay layer and the fine sand layer to form a hole 6.

[0038] Drill a hole at the location where the fine sand layer 3 is half the thickness of the hole 6 is close to the side of the tank body 1 to set the water outlet a4, and drill a hole at the same height at the other end of the fine sand layer 3 to set the water outlet b5.

[0039] The water supply device includes a glass bottle 10, and the glass bottle 10 is provided with a scale 14.

[0040] The fine sand particles in the fine sand layer 3 are approximately 0.2 mm in size.

[0041] A hollow tube 15 is threaded through the top cover 15 of the glass bottle 10. The top cover 15 is also provided with a water inlet 16, and a water inlet cap 17 is provided on the water inlet 16.

[0042] The thickness of the clay layer 2 is 10cm, and the thickness of the fine sand layer 3 is 10cm.

[0043] The housing connector 8 is located in the middle of the housing 1.

[0044] The drilled water outlet a4 is located at 1 / 4 of the width of the tank, and the water outlet b5 is located at 3 / 4 of the width of the tank.

[0045] The hollow tube 15 is movably connected to the upper cover 11, and the height of the hollow tube 15 can be adjusted according to the water pressure.

[0046] Example 4

[0047] The drilling flow velocity physical similarity simulation experimental device of this utility model is divided into two parts: a water supply device and a sand box. The sand box is a square box 1 with an open bottom formed by pasting acrylic transparent plates. A 30cm high fine-pore screen 7 (the high fine-pore screen has a hole diameter of 0.1~0.2mm) is pre-embedded at 1 / 4 of the width of the box 1. Inside the box 1, 10cm thick clay, 10cm thick fine sand (particle size of about 0.2mm) and 10cm thick clay are laid from bottom to top. After the laying is completed, a drilling hole 6 is formed.

[0048] Drill a hole at the point where the fine sand layer 3 is half the thickness of the hole 6 is close to the side of the box body 1 to set the water outlet a4. Drill a hole at the same position at the other end to set the water outlet b5. Drill a hole at the point where the fine sand layer 3 is half the thickness and half the width of the other side of the box body 1 to set the box body connector 8. Connect the water bottle connector 13 to the box body connector 8 with a water pipe 9.

[0049] The water supply device includes a glass bottle 10, which includes a bottom 12 and a top cover 11. The glass bottle 10 has a scale 14, and a water bottle connector 13 is provided at the bottom opening. Hollow tubes 15 and water inlets 16 are respectively inserted through the openings on the top cover 11, and a water inlet cap 17 is provided on the water inlet 16.

[0050] Example 5

[0051] The drilling flow velocity physical similarity simulation experimental device of this utility model includes a water supply device and a sand box connected to each other. The sand box includes a box body 1 with an open bottom formed by bonding acrylic transparent plates, and a vertical high fine hole screen 7 is pre-embedded on one side of the box body 1.

[0052] Inside the box 1, a clay layer 2, a fine sand layer 3, and another clay layer 2 are laid sequentially from bottom to top. A fine mesh screen 7 is placed inside the clay layer and the fine sand layer to form a drill hole 6. A drill hole outlet a4 is drilled at 1 / 2 the thickness of the fine sand layer 3 on one side of the box 1, and a drill hole outlet b5 is drilled at the same height on the other end of the fine sand layer 3.

[0053] The water supply device includes a glass bottle 10 with a scale 14 on it. A hollow tube 15 passes through the upper cover 15 of the glass bottle 10. The upper cover 15 is also provided with a water inlet 16 and a water inlet cap 17.

[0054] A hole is drilled at 1 / 2 the thickness of the fine sand layer 3 on the side of the box body 1 away from the drill hole 6 to set the box body connector 8. A water bottle connector 13 is set at the bottom of the glass bottle 10. The box body and the glass bottle are connected through the box body connector 8, the water pipe 9 and the water bottle connector 13. The water pipe 9 connects the water bottle connector 13 to the box body connector 8.

[0055] The aperture of the high-fineness sieve 7 is 0.1~0.2mm; the height of the high-fineness sieve 7 is consistent with the total height of the fine sand layer 3 and the two clay layers 2.

[0056] The thickness of the clay layer 2 is 10cm, and the thickness of the fine sand layer 3 is 10cm.

[0057] The housing connector 8 is located in the middle of the housing 1.

[0058] The drilled water outlet a4 is located at 1 / 4 of the width of the tank, and the water outlet b5 is located at 3 / 4 of the width of the tank.

[0059] The hollow tube 15 is movably connected to the upper cover 11, and the height of the hollow tube 15 can be adjusted according to the water pressure.

[0060] Example 6

[0061] During the experiment, water was poured into the glass bottle 10 by opening the water filling cap 17. Once the water flow at the borehole outlet a4 and outlet b5 was stable and the glass bottle 10 was filled to the position of the top cap 11, the water filling cap 17 was quickly closed. According to the hydraulic gradient (water pressure) requirements of the experimental process, the water pressure was adjusted by adjusting the height of the hollow tube 15 according to the scale 14. Maintaining the hollow tube 15 in a constant position can provide a stable water pressure. The water output of the borehole outlet a4 and outlet b5 was measured within 1 hour. The flow velocity of the borehole outlet a4 and outlet b5 was calculated according to the water output formula, and the differences between the borehole flow velocity and the water flow velocity in the fine sand layer were analyzed.

[0062] When the hollow tube 15 is inserted into the glass bottle 10 and the top cap 11 is closed, the air inside the glass bottle is sealed off. As the water flows, the change in the volume of the air inside the bottle causes a change in air pressure. At this time, by adjusting the length of the hollow tube 15 inside the bottle, the water pressure can be regulated, thereby indirectly and stably adjusting the water flow rate of the glass bottle.

[0063] The formula for water output is as follows:

[0064] Flow velocity (m / s) = Flow rate (m³ / s) 3 / h) ÷ Outlet cross-sectional area (m²) 2 ) ÷ 3600

[0065] This invention's borehole flow velocity physical similarity simulation experimental device, through its layered transparent sand box and high-fine-mesh sieve design, enables direct observation and precise control of fluid flow inside the borehole. The scale design of its water supply device and the protection measures for the water inlet further improve the accuracy and operability of the experiment. This device is not only suitable for teaching and research but also provides important reference for practical engineering, exhibiting significant economic and social benefits.

[0066] The above describes and illustrates the basic principles, main features, and advantages of this utility model.

[0067] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A physical similarity simulation experimental device for borehole flow velocity, characterized in that: The system includes a water supply device and a sand box connected to the water supply device. The sand box includes a box body (1) with an open bottom formed by bonding acrylic transparent plates. A vertical fine-pore screen (7) is pre-embedded on one side of the box body (1). Inside the box body (1), a clay layer (2), a fine sand layer (3), and another clay layer (2) are laid sequentially from bottom to top. The fine-pore screen (7) is placed in the clay layer and the fine sand layer to form a drill hole (6). A drill hole outlet a (4) is drilled at 1 / 2 the thickness of the fine sand layer (3) on the side of the drill hole (6) close to the box body (1). A drill hole outlet b (5) is drilled at the same height at the other end of the fine sand layer (3).

2. The borehole flow velocity physical similarity simulation experimental device according to claim 1, characterized in that: The water supply device includes a glass bottle (10), the glass bottle (10) is provided with a scale (14), a hollow tube (15) is passed through the upper cover (11) of the glass bottle (10), the upper cover (11) is also provided with a water inlet (16), and the water inlet (16) is provided with a water inlet cap (17).

3. The borehole flow velocity physical similarity simulation experimental device according to claim 2, characterized in that: A box connector (8) is installed at 1 / 2 the thickness of the fine sand layer (3) on the side of the box (1) away from the drill hole (6). A water bottle connector (13) is installed at the bottom of the glass bottle (10). The box and the glass bottle are connected through the box connector (8), the water pipe (9) and the water bottle connector (13). The water pipe (9) connects the water bottle connector (13) to the box connector (8).

4. The borehole flow velocity physical similarity simulation experimental device according to claim 3, characterized in that: The aperture of the high-fine-pore screen (7) is 0.1~0.2mm; the height of the high-fine-pore screen (7) is consistent with the total height of the fine sand layer (3) and the two clay layers (2).

5. The borehole flow velocity physical similarity simulation experimental apparatus according to claim 2, characterized in that, The thickness of the clay layer (2) is 10cm, and the thickness of the fine sand layer (3) is 10cm.

6. The borehole flow velocity physical similarity simulation experimental apparatus according to claim 3, characterized in that, The box connector (8) is located in the middle of the box (1).

7. The borehole flow velocity physical similarity simulation experimental apparatus according to claim 6, characterized in that, The drilled water outlet a (4) is located at 1 / 4 of the width of the tank, and the water outlet b (5) is located at 3 / 4 of the width of the tank.

8. The borehole flow velocity physical similarity simulation experimental apparatus according to claim 7, characterized in that, The hollow tube (15) is movably connected to the top cover (11), and the height of the hollow tube (15) can be adjusted according to the water pressure.

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