A device for measuring permeability coefficient of rock and soil

Abstract

The present invention discloses a device for measuring the permeability coefficient of rock and soil, which relates to the field of geotechnical engineering technology. The device comprises a housing assembly, a water supply drive mechanism disposed inside the housing assembly, a sealing mechanism, a discharging mechanism, and a blocking mechanism disposed on the outside of the water supply drive mechanism in order from top to bottom, and a fluorescence measurement assembly disposed inside the housing assembly; the housing assembly comprises a sample holding housing, a drainage pipe, a soil output channel, a top plate, and a bracket; the fluorescence measurement assembly is fixedly disposed at the bottom of the inner cavity of the sample holding housing, the drainage pipe and the soil output channel are fixedly disposed through the left bottom of the sample holding housing in order from bottom to top, and the top plate is located directly above the sample holding housing. The present invention can automatically output the rock and soil sample after the measurement is completed, has a high degree of automation, saves manpower, and can effectively avoid soil residue, thereby allowing the next rock and soil sample to be tested quickly.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical engineering, and in particular to a device for measuring the permeability coefficient of a rock and soil body. Background Art

[0002] Rock and soil seepage is an important factor affecting the stability of slope foundation pits and reservoir bank dams. Therefore, obtaining accurate soil permeability parameters through experiments has important engineering significance and scientific research value.

[0003] Patent application number CN105866001B discloses a device and method for measuring the permeability coefficient of rock and soil using a water-based fluorescent agent dilution method. The device comprises a liquid supply tank, the bottom of which is connected to a water inlet pipe equipped with a water stop valve. A plexiglass cylinder is placed directly below the inlet pipe, filled with a rock and soil sample to be tested. The top layer of the rock and soil sample is provided with a gravel layer, and the bottom layer is provided with a permeable mesh and a steel filter. An exhaust device is symmetrically positioned at the bottom of the plexiglass cylinder. The seepage velocity is directly determined by measuring the fluorescent agent concentration, which is determined by a fluorescence detection subsystem.

[0004] However, after completing a single test of the geotechnical sample, the above-mentioned device and similar devices in the prior art cannot conveniently clear the geotechnical sample in the device. It often requires a long period of manual operation to complete the output of the geotechnical sample. This results in the existing device being unable to quickly test the next geotechnical sample after completing the test of the current geotechnical sample, which is inconvenient in actual use.

[0005] In particular, rock and soil will turn into sticky soil after continuous soaking in water. During the manual output process, it will take a long time to clean the inner wall of the device, further increasing manpower consumption.

[0006] Therefore, it is necessary to invent a rock and soil permeability coefficient measuring device to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a device for measuring the permeability coefficient of rock and soil to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for measuring the permeability coefficient of rock and soil, comprising a housing assembly, a water supply drive mechanism disposed inside the housing assembly, a sealing mechanism, a discharging mechanism, and a blocking mechanism disposed on the outside of the water supply drive mechanism in order from top to bottom, and a fluorescence measurement component disposed inside the housing assembly;

[0009] The housing assembly includes a sample holding housing, a drainage pipe, a soil output channel, a top plate and a bracket;

[0010] The fluorescence measurement assembly is fixedly arranged at the bottom of the inner cavity of the sample holding shell. The drainage pipe and the soil output channel are fixedly arranged from bottom to top through the bottom of the left side of the sample holding shell. The top plate is located directly above the sample holding shell. Two brackets are provided. The two brackets are fixedly arranged on both sides of the top plate and are fixedly connected to the sample holding shell.

[0011] The water supply drive mechanism includes a drive screw, a water supply pipe, a drive motor, a drive gear, a first water outlet, a second water outlet, a third water outlet and an end plate;

[0012] The driving screw passes through the top plate and is rotatably connected to the top plate through a bearing. The water supply pipe is rotatably connected to the top of the driving screw through a rotary joint. The driving motor is fixedly arranged on the right side of the top of the top plate. There are two driving gears, and the two driving gears are meshed with each other. One driving gear is fixedly sleeved on the top outside of the driving screw, and the other driving gear is transmission-connected to the driving motor. The first water outlet is opened at the top of the front face of the driving screw, and the second water outlet and the third water outlet are each provided with multiple, and the multiple second water outlets and the multiple third water outlets are evenly opened at the bottom outside the driving screw. The end plate is rotatably sleeved on the bottom outside the driving screw through a bearing, and the end plate is fixedly connected to the inner wall of the sample holding shell.

[0013] Preferably, the closing mechanism includes a first closing tube and a first spring.

[0014] Preferably, the first closing tube is slidingly sleeved on the outside of the driving screw, the first spring is sleeved on the outside of the driving screw, one end of the first closing tube is fixedly connected to the top plate and the other end is fixedly connected to the first closing tube.

[0015] Preferably, the discharging mechanism includes a discharging scraper, a guide rod, a guide groove, a first guide rail and a second guide rail.

[0016] Preferably, the discharging scraper is slidingly sleeved on the outside of the driving screw and blocks the first water outlet. Two of the guide rods, guide grooves, first guide rails and second guide rails are respectively provided. The two guide rods are respectively slid through and arranged on both sides of the bottom of the discharging scraper, and both penetrate the top plate and are slidably connected to the top plate. The two guide grooves are respectively opened on both sides of the discharging scraper. The two first guide rails are respectively fixed on the two side walls inside the sample holding shell, and the two second guide rails are respectively located at the bottom of the two first guide rails.

[0017] Preferably, the blocking mechanism includes a lifting frame, a second closed tube, a wire filter, a water-permeable gauze, a telescopic rod, a second spring and a closed plate.

[0018] Preferably, the lifting frame is slidably arranged inside the sample holding shell along the vertical direction, the two second guide rails are respectively fixed on both sides of the top of the lifting frame, the two guide rods are fixedly connected to the lifting frame, the second closing tube is rotatably nested inside the lifting frame through a bearing, the second closing tube is slidably sleeved on the outside of the driving screw, and blocks the multiple second water outlet holes and the multiple third water outlet holes, the steel wire filter screen and the permeable gauze are both provided in plurality, the multiple steel wire filter screens are evenly fixed and nested on the inside of the lifting frame, the multiple permeable gauze screens are placed on the top of the multiple steel wire filter screens, the telescopic rod and the second spring are both provided with two, the two telescopic rods are respectively fixed on both sides of the bottom of the lifting frame, and are both fixedly connected to the inner wall of the sample holding shell, the two second springs are respectively sleeved on the outside of the two telescopic rods, the closing plate is fixed on the left side of the bottom of the lifting frame, and slidably fits the inner wall of the sample holding shell, and the closing plate blocks the entrance of the soil output channel.

[0019] The present invention also provides a method for using a rock and soil permeability coefficient measuring device, which specifically includes the following steps:

[0020] S1. Add the rock and soil sample into the sample holding shell through the top opening of the sample holding shell. The rock and soil sample is blocked by the barrier mechanism and accumulates on the top of the barrier mechanism. Then, the drive motor drives the drive screw to rotate clockwise through the drive gear. At this time, the drive screw drives the discharge scraper to rise. When the discharge scraper rises, it pushes the first sealing pipe and releases the blockage of the first water outlet. At this time, the water flow input into the drive screw by the water supply pipe enters the shell assembly through the first water outlet. After the addition is completed, the drive motor drives the drive screw to rotate counterclockwise. At this time, the drive screw returns to its original position.

[0021] S2. The water flow moistens the rock and soil sample, and part of the water flow passes through the rock and soil sample, the water-permeable mesh, and the wire filter and flows into the bottom of the inner cavity of the sample holding shell. At this time, the fluorescence measurement component works, adding a fluorescent diluent to the water at the bottom of the inner cavity of the sample holding shell and mixing it evenly with the water. After the fluorescence measurement component is preheated, the water flow at the bottom of the inner cavity of the sample holding shell is discharged through the drain pipe. During this process, water continuously seeps through the rock and soil sample, and the fluorescent diluent at the bottom of the inner cavity of the sample holding shell is continuously diluted. The fluorescence measurement component reads and stores the fluorescent agent concentration value in real time, and the data is processed at the terminal to measure the infiltration flow rate of the rock and soil sample to be tested;

[0022] S3. After the measurement is completed, the drive motor drives the drive screw to continue to rotate counterclockwise. At this time, the discharge scraper continues to descend along the guide rod. During the descent of the discharge scraper, the first spring pushes the first sealing tube, thereby causing the first sealing tube to close the first water outlet. As the discharge scraper continues to descend, the discharge scraper enters the inside of the sample holding shell. At this time, the first guide rail enters the inside of the guide groove, and cooperates with the guide rod to synchronously guide the discharge scraper;

[0023] S4. When the discharge scraper reaches a first threshold value when it descends, it contacts the rock sample. Subsequently, as the discharge scraper continues to descend, the rock sample is continuously pushed downward. As the rock sample moves downward, it pushes the lifting frame, which in turn drives the second sealing tube to descend outside the drive screw. Simultaneously, as the lifting frame descends, it drives the sealing plate to gradually release the seal on the entrance of the soil output channel, and the rock sample begins to be discharged through the soil output channel.

[0024] S5. When the discharge scraper descends a distance reaching a second threshold, the second sealing pipe, driven by the lifting frame, successively releases the seals on the second water outlet holes and the third water outlet holes. At this time, the water inputted into the driving screw by the water supply pipe is continuously discharged through the second water outlet holes and the third water outlet holes, thereby further diluting the rock and soil sample and making it easier to discharge.

[0025] S6. When the discharge scraper has descended a distance that reaches a third threshold, the lifting frame drives the closing plate to completely unblock the soil output channel and cannot descend any further. At this time, as the discharge scraper continues to descend, the discharge scraper continuously pushes the diluted rock and soil sample, thereby continuously discharging the rock and soil sample. When the discharge scraper has descended a distance that reaches a fourth threshold, the rock and soil sample is completely discharged, and part of the sewage generated during the dilution process of the rock and soil sample is also discharged through the drain pipe. At this time, the discharge scraper and the lifting frame are in contact with each other. During the contact process between the discharge scraper and the lifting frame, the water ejected from the second water outlet and the third water outlet completes the cleaning of the bottom of the discharge scraper.

[0026] S7. When the drainage pipe and the soil output channel begin to output clean water, the drive motor drives the drive screw to rotate clockwise through the drive gear, thereby driving the discharge scraper to reset. During the resetting process of the discharge scraper, the second spring pushes the lifting frame, thereby causing the lifting frame to reset synchronously. When the discharge scraper is completely reset, the technician adds the second rock and soil sample through the top opening of the shell assembly for measurement.

[0027] Technical effects and advantages of the present invention:

[0028] The present invention is provided with a water supply drive mechanism, a closing mechanism, a discharging mechanism and a blocking mechanism, so that after the rock and soil sample is measured, the water supply drive mechanism drives the discharging mechanism, and the discharging mechanism gradually descends after being driven. At this time, the closing mechanism automatically takes over the discharging mechanism to complete the sealing of the first water outlet, and the continuously descending discharging mechanism pushes the rock and soil sample and the blocking mechanism, thereby discharging the rock and soil sample. In addition, as the blocking mechanism continues to descend, the blocking mechanism releases the blockage of the second water outlet and the third water outlet, so that the rock and soil sample is continuously diluted, thereby reducing the difficulty of discharge. At the same time, the discharging mechanism can be cleaned to avoid soil residue. Compared with the same type of device in the prior art, the present invention can automatically complete the output of the rock and soil sample after the measurement is completed. It has a high degree of automation and saves manpower. It can also effectively avoid soil residue, and thus the next rock and soil sample can be tested quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall front view structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the present invention.

[0031] Figure 3 It is a front cross-sectional structural diagram of a part of the water supply drive mechanism, the closing mechanism and the discharge mechanism of the present invention.

[0032] Figure 4 It is a front cross-sectional structural diagram of a part of the water supply drive mechanism, the discharge mechanism and the barrier mechanism of the present invention.

[0033] Figure 5 It is a schematic diagram of the top view of the barrier mechanism of the present invention.

[0034] Figure 6 It is a partial front cross-sectional structural diagram of the water supply drive mechanism of the present invention.

[0035] In the figure: 1. Shell assembly; 11. Sample holding shell; 12. Drain pipe; 13. Soil output channel; 14. Top plate; 15. Bracket; 2. Water supply drive mechanism; 21. Drive screw; 22. Water supply pipe; 23. Drive motor; 24. Drive gear; 25. First water outlet; 26. Second water outlet; 27. Third water outlet; 28. End plate; 3. Closing mechanism; 31. First closing pipe; 32. First spring; 4. Discharging mechanism; 41. Discharging scraper; 42. Guide rod; 43. Guide groove; 44. First guide rail; 45. Second guide rail; 5. Blocking mechanism; 51. Lifting frame; 52. Second closing pipe; 53. Steel wire filter; 54. Permeable gauze; 55. Telescopic rod; 56. Second spring; 57. Closing plate; 6. Fluorescence measurement assembly. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] The present invention provides Figure 1-6 The device shown is a rock and soil permeability coefficient measuring device, including a shell assembly 1, a water supply drive mechanism 2 is arranged inside the shell assembly 1, and a closing mechanism 3, a discharging mechanism 4 and a blocking mechanism 5 are arranged on the outside of the water supply drive mechanism 2 from top to bottom, and a fluorescence measurement component 6 is arranged inside the shell assembly 1.

[0039] It should also be noted that the fluorescence measurement component 6 includes a fluorescent agent delivery device and a fluorescence detection subsystem, but the fluorescence measurement component 6 belongs to a solution that has been disclosed in the prior art and is not a necessary technical feature of this application. Therefore, this application does not elaborate on its specific structure here.

[0040] like Figure 2 As shown, the shell assembly 1 includes a sample holding shell 11, a drainage pipe 12, a soil output channel 13, a top plate 14 and a bracket 15, wherein the fluorescence measurement component 6 is fixedly arranged at the bottom of the inner cavity of the sample holding shell 11, and the drainage pipe 12 and the soil output channel 13 are fixedly arranged from bottom to top in sequence through the bottom left side of the sample holding shell 11, and the top plate 14 is located directly above the sample holding shell 11. There are two brackets 15, and the two brackets 15 are respectively fixedly arranged on both sides of the top plate 14, and are both fixedly connected to the sample holding shell 11.

[0041] like Figure 3 、 Figure 4 and Figure 6As shown, the water supply drive mechanism 2 includes a drive screw 21, a water supply pipe 22, a drive motor 23, a drive gear 24, a first water outlet 25, a second water outlet 26, a third water outlet 27 and an end plate 28, wherein the drive screw 21 passes through the top plate 14 and is rotatably connected to the top plate 14 through a bearing, the water supply pipe 22 is rotatably connected to the top of the drive screw 21 through a rotary joint, the drive motor 23 is fixedly arranged on the right side of the top of the top plate 14, and two drive gears 24 are provided. The two drive gears 24 are meshed with each other, and one is The driving gear 24 is fixedly sleeved on the outer top of the driving screw 21, and the other driving gear 24 is connected to the driving motor 23 for transmission. The first water outlet 25 is opened at the front top of the driving screw 21, and the second water outlet 26 and the third water outlet 27 are each provided with multiple, and the multiple second water outlet holes 26 and the multiple third water outlet holes 27 are evenly opened at the outer bottom of the driving screw 21. The end plate 28 is rotatably sleeved on the outer bottom of the driving screw 21 through a bearing, and the end plate 28 is fixedly connected to the inner wall of the sample holding shell 11.

[0042] By setting up the above structure, the water supply pipe 22 can inject water into the driving screw 21, and the water can be output through the first water outlet 25, the second water outlet 26 and the third water outlet 27. At the same time, the driving motor 23 can drive the driving screw 21 to rotate through the driving gear 24, thereby driving the discharging mechanism 4.

[0043] like Figure 3 As shown, the closing mechanism 3 includes a first closing tube 31 and a first spring 32, wherein the first closing tube 31 is slidably sleeved on the outside of the driving screw 21, the first spring 32 is sleeved on the outside of the driving screw 21, and one end of the first closing tube 31 is fixedly connected to the top plate 14 and the other end is fixedly connected to the first closing tube 31.

[0044] like Figure 3 、 Figure 4 and Figure 5 As shown, the discharging mechanism 4 includes a discharging scraper 41, a guide rod 42, a guide groove 43, a first guide rail 44 and a second guide rail 45, wherein the discharging scraper 41 is slidably sleeved on the outside of the driving screw 21 and blocks the first water outlet 25, and two of the guide rods 42, the guide groove 43, the first guide rail 44 and the second guide rail 45 are respectively provided, and the two guide rods 42 are respectively slid through and set on both sides of the bottom of the discharging scraper 41, and both penetrate the top plate 14 and are slidably connected to the top plate 14, the two guide grooves 43 are respectively opened on both sides of the discharging scraper 41, the two first guide rails 44 are respectively fixed on the two side walls inside the sample holding shell 11, and the two second guide rails 45 are respectively located at the bottom of the two first guide rails 44.

[0045] By setting the closing mechanism 3 and the discharging mechanism 4, the first closing tube 31 is pushed when the discharging scraper 41 rises, and the blockage of the first water outlet 25 is released. At this time, the water flow input into the driving screw 21 by the water supply pipe 22 enters the interior of the shell assembly 1 through the first water outlet 25. When the discharging scraper 41 descends, the first spring 32 pushes the first closing tube 31, thereby causing the first closing tube 31 to close the first water outlet 25. As the discharging scraper 41 continues to descend, the discharging scraper 41 enters the inside of the sample holding shell 11. At this time, the first guide rail 44 enters the inside of the guide groove 43, and cooperates with the guide rod 42 to synchronously guide the discharging scraper 41. When the descending distance of the discharging scraper 41 reaches the first threshold, the discharging scraper 41 contacts the geotechnical sample. Subsequently, as the discharging scraper 41 continues to descend, the geotechnical sample is continuously pushed downward.

[0046] like Figure 4 、 Figure 5 and Figure 6 As shown, the blocking mechanism 5 includes a lifting frame 51, a second closed tube 52, a wire filter 53, a water-permeable mesh 54, a telescopic rod 55, a second spring 56 and a closing plate 57, wherein the lifting frame 51 is slidably arranged inside the sample holding shell 11 along the vertical direction, the two second guide rails 45 are respectively fixedly arranged on both sides of the top of the lifting frame 51, the two guide rods 42 are fixedly connected to the lifting frame 51, the second closed tube 52 is rotatably nested in the inner side of the lifting frame 51 through a bearing, the second closed tube 52 is slidably sleeved on the outer side of the driving screw 21, and blocks the multiple second water outlet holes 26 and the multiple third water outlet holes 27. There are multiple nets 53 and permeable meshes 54. Multiple wire meshes 53 are evenly fixed and nested on the inner side of the lifting frame 51. Multiple permeable meshes 54 are placed on top of multiple wire meshes 53. There are two telescopic rods 55 and two second springs 56. The two telescopic rods 55 are respectively fixed on both sides of the bottom of the lifting frame 51 and are fixedly connected to the inner wall of the sample holding shell 11. The two second springs 56 are respectively sleeved on the outside of the two telescopic rods 55. The closing plate 57 is fixed on the left side of the bottom of the lifting frame 51 and slides to fit the inner wall of the sample holding shell 11. The closing plate 57 blocks the entrance of the soil output channel 13.

[0047] By setting up the above structure, the lifting frame 51 is pushed when the geotechnical sample moves downward, and the lifting frame 51 drives the second sealing tube 52 to descend on the outside of the driving screw 21. At the same time, when the lifting frame 51 descends, it drives the sealing plate 57 to gradually release the seal at the entrance of the soil output channel 13, and the geotechnical sample begins to be discharged through the soil output channel 13. In addition, when the discharge scraper 41 descends to a second threshold, the second sealing tube 52, driven by the lifting frame 51, successively releases the seal on the multiple second water outlets 26 and the multiple third water outlets 27. At this time, the water flow input from the water supply pipe 22 to the inside of the driving screw 21 is continuously output through the multiple second water outlets 26 and the multiple third water outlets 27, thereby further diluting the geotechnical sample and making it better discharged.

[0048] Example 2

[0049] The present invention also provides a method for using a rock and soil permeability coefficient measuring device, which specifically includes the following steps:

[0050] S1. Add the rock and soil sample into the sample holding shell 11 through the top opening of the sample holding shell 11. The rock and soil sample is blocked by the barrier mechanism 5 and accumulates on the top of the barrier mechanism 5. Then, the drive motor 23 drives the drive screw 21 to rotate clockwise through the drive gear 24. At this time, the drive screw 21 drives the discharge scraper 41 to rise. When the discharge scraper 41 rises, it pushes the first closed tube 31 and releases the blockage of the first water outlet 25. At this time, the water flow input into the drive screw 21 by the water supply pipe 22 enters the shell assembly 1 through the first water outlet 25. After the addition is completed, the drive motor 23 drives the drive screw 21 to rotate counterclockwise. At this time, the drive screw 21 returns to its original position.

[0051] S2. The water flow moistens the rock and soil sample, and part of the water flow passes through the rock and soil sample, the water-permeable mesh 54 and the wire filter 53 and flows into the bottom of the inner cavity of the sample holding shell 11. At this time, the fluorescence measurement component 6 works, adding a fluorescent diluent to the water at the bottom of the inner cavity of the sample holding shell 11 and mixing it evenly with the water. After the fluorescence measurement component 6 completes preheating, the water flow at the bottom of the inner cavity of the sample holding shell 11 is discharged through the drain pipe 12. In this process, water continuously seeps through the rock and soil sample, and the fluorescent diluent at the bottom of the inner cavity of the sample holding shell 11 is continuously diluted. The fluorescence measurement component 6 reads and stores the fluorescent agent concentration value in real time, and the data is processed at the terminal to measure the infiltration flow rate of the rock and soil sample to be tested;

[0052] S3. After the measurement is completed, the drive motor 23 drives the drive screw 21 to continue to rotate counterclockwise. At this time, the discharge scraper 41 continues to descend along the guide rod 42. During the descent of the discharge scraper 41, the first spring 32 pushes the first sealing tube 31, thereby causing the first sealing tube 31 to close the first water outlet 25. As the discharge scraper 41 continues to descend, the discharge scraper 41 enters the inner side of the sample holding shell 11. At this time, the first guide rail 44 enters the inner side of the guide groove 43, and cooperates with the guide rod 42 to synchronously guide the discharge scraper 41.

[0053] S4. When the discharge scraper 41 descends a distance that reaches a first threshold, the discharge scraper 41 contacts the rock sample. Subsequently, as the discharge scraper 41 continues to descend, the rock sample is continuously pushed downward. As the rock sample moves downward, it pushes the lifting frame 51, which in turn drives the second sealing tube 52 to descend outside the driving screw 21. At the same time, as the lifting frame 51 descends, it drives the sealing plate 57 to gradually release the seal on the entrance of the soil output channel 13, and the rock sample begins to be discharged through the soil output channel 13.

[0054] S5. When the discharge scraper 41 descends a distance reaching a second threshold, the second sealing pipe 52, driven by the lifting frame 51, successively releases the seals on the second water outlet holes 26 and the third water outlet holes 27. At this time, the water inputted into the driving screw 21 by the water supply pipe 22 is continuously discharged through the second water outlet holes 26 and the third water outlet holes 27, thereby further diluting the rock and soil sample and making it easier to discharge.

[0055] S6. When the discharge scraper 41 descends a distance that reaches the third threshold, the lifting frame 51 drives the closing plate 57 to completely release the blockage of the soil output channel 13 and cannot continue to descend. At this time, as the discharge scraper 41 continues to descend, the discharge scraper 41 continuously pushes the diluted rock and soil sample, thereby continuously discharging the rock and soil sample. When the discharge scraper 41 descends a distance that reaches the fourth threshold, the rock and soil sample is completely discharged, and part of the sewage generated during the dilution process of the rock and soil sample is also discharged through the drain pipe 12. At this time, the discharge scraper 41 and the lifting frame 51 are in contact with each other. During the contact process between the discharge scraper 41 and the lifting frame 51, the water flow ejected from the second water outlet 26 and the third water outlet 27 completes the cleaning of the bottom of the discharge scraper 41.

[0056] S7. When the drainage pipe 12 and the soil output channel 13 begin to output clean water, the drive motor 23 drives the drive screw 21 to rotate clockwise through the drive gear 24, thereby driving the discharge scraper 41 to reset. During the reset process of the discharge scraper 41, the second spring 56 pushes the lifting frame 51, thereby causing the lifting frame 51 to reset synchronously. When the discharge scraper 41 is completely reset, the technician adds the second rock and soil sample through the top opening of the shell assembly 1 for measurement.

[0057] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for measuring the permeability coefficient of rock and soil, characterized by: The invention comprises a housing assembly (1), wherein a water supply drive mechanism (2) is provided inside the housing assembly (1), a sealing mechanism (3), a discharging mechanism (4) and a blocking mechanism (5) are provided on the outside of the water supply drive mechanism (2) in order from top to bottom, and a fluorescence measurement assembly (6) is provided inside the housing assembly (1); The housing assembly (1) comprises a sample containing housing (11), a drainage pipe (12), a soil output channel (13), a top plate (14) and a bracket (15); The fluorescence measurement component (6) is fixedly arranged at the bottom of the inner cavity of the sample holding shell (11); the drainage pipe (12) and the soil output channel (13) are fixedly arranged from bottom to top and pass through the bottom of the left side of the sample holding shell (11); the top plate (14) is located directly above the sample holding shell (11); two brackets (15) are provided, and the two brackets (15) are respectively fixedly arranged on both sides of the top plate (14) and are both fixedly connected to the sample holding shell (11); The water supply drive mechanism (2) comprises a drive screw (21), a water supply pipe (22), a drive motor (23), a drive gear (24), a first water outlet (25), a second water outlet (26), a third water outlet (27) and an end plate (28); The driving screw (21) passes through the top plate (14) and is rotatably connected to the top plate (14) through a bearing. The water supply pipe (22) is rotatably connected to the top of the driving screw (21) through a rotary joint. The driving motor (23) is fixedly arranged on the right side of the top of the top plate (14). Two driving gears (24) are provided. The two driving gears (24) are meshed with each other. One driving gear (24) is fixedly sleeved on the top of the outer side of the driving screw (21), and the other driving gear (24) is fixedly sleeved on the outer side of the driving screw (21). The driving motor (23) is connected in transmission, the first water outlet (25) is opened at the front top of the driving screw (21), the second water outlet (26) and the third water outlet (27) are both provided in plurality, and the plurality of the second water outlet holes (26) and the plurality of the third water outlet holes (27) are evenly opened at the outer bottom of the driving screw (21), the end plate (28) is rotatably sleeved and arranged at the outer bottom of the driving screw (21) through a bearing, and the end plate (28) is fixedly connected to the inner wall of the sample holding shell (11).

2. The rock and soil permeability coefficient measuring device according to claim 1, characterized in that: The closing mechanism (3) comprises a first closing tube (31) and a first spring (32).

3. The rock and soil permeability coefficient measuring device according to claim 2, characterized in that: The first closing tube (31) is slidably sleeved on the outside of the driving screw (21), the first spring (32) is sleeved on the outside of the driving screw (21), one end of the first closing tube (31) is fixedly connected to the top plate (14) and the other end is fixedly connected to the first closing tube (31).

4. The rock and soil permeability coefficient measuring device according to claim 3, characterized in that: The discharging mechanism (4) comprises a discharging scraper (41), a guide rod (42), a guide groove (43), a first guide rail (44) and a second guide rail (45).

5. The rock and soil permeability coefficient measuring device according to claim 4, characterized in that: The discharging scraper (41) is slidably sleeved on the outside of the driving screw (21) and blocks the first water outlet (25). Two guide rods (42), guide grooves (43), first guide rails (44) and second guide rails (45) are each provided. The two guide rods (42) are respectively slidably penetrated and provided on both sides of the bottom of the discharging scraper (41), and both penetrate the top plate (14) and are slidably connected to the top plate (14). The two guide grooves (43) are respectively opened on both sides of the discharging scraper (41). The two first guide rails (44) are respectively fixed on the inner side walls of the sample holding shell (11), and the two second guide rails (45) are respectively located at the bottom of the two first guide rails (44).

6. The rock and soil permeability coefficient measuring device according to claim 5, characterized in that: The blocking mechanism (5) comprises a lifting frame (51), a second closed tube (52), a steel wire filter (53), a water-permeable gauze (54), a telescopic rod (55), a second spring (56) and a closed plate (57).

7. The device for measuring the permeability coefficient of rock and soil according to claim 6, characterized in that: The lifting frame (51) is slidably arranged inside the sample holding shell (11) in the vertical direction, and the two second guide rails (45) are respectively fixedly arranged on both sides of the top of the lifting frame (51). The two guide rods (42) are fixedly connected to the lifting frame (51). The second closed tube (52) is rotatably nested on the inner side of the lifting frame (51) through a bearing. The second closed tube (52) is slidably sleeved on the outer side of the driving screw (21) and blocks the multiple second water outlet holes (26) and the multiple third water outlet holes (27). The steel wire filter (53) and the water-permeable gauze (54) are both provided with multiple, and the multiple steel wire filters (53) are evenly fixed. Nested inside the lifting frame (51), a plurality of the water-permeable meshes (54) are placed on top of a plurality of steel wire filters (53), two telescopic rods (55) and two second springs (56) are provided, the two telescopic rods (55) are respectively fixed on both sides of the bottom of the lifting frame (51), and are both fixedly connected to the inner wall of the sample holding shell (11), the two second springs (56) are respectively sleeved on the outside of the two telescopic rods (55), the closing plate (57) is fixed on the left side of the bottom of the lifting frame (51), and is slidably fitted on the inner wall of the sample holding shell (11), and the closing plate (57) blocks the entrance of the soil output channel (13).

8. A method for using a rock and soil permeability coefficient measuring device according to any one of claims 1 to 7, characterized in that: The specific steps include: S1. Add the rock and soil sample into the sample holding shell (11) through the top opening of the sample holding shell (11). The rock and soil sample is accumulated on the top of the blocking mechanism (5) due to the obstruction of the blocking mechanism (5). Then, the driving motor (23) drives the driving screw (21) to rotate clockwise through the driving gear (24). At this time, the driving screw (21) drives the discharging scraper (41) to rise. When the discharging scraper (41) rises, it pushes the first sealing tube (31) and releases the blockage of the first water outlet (25). At this time, the water flow input into the driving screw (21) by the water supply pipe (22) enters the shell assembly (1) through the first water outlet (25). After the addition is completed, the driving motor (23) drives the driving screw (21) to rotate counterclockwise. At this time, the driving screw (21) is reset; S2, the water flow moistens the rock and soil sample, and part of the water flow passes through the rock and soil sample, the water-permeable mesh (54) and the wire filter (53) and flows into the bottom of the inner cavity of the sample holding shell (11). At this time, the fluorescence measurement component (6) works, adds a fluorescent diluent to the water at the bottom of the inner cavity of the sample holding shell (11), and mixes it with the water evenly. After the fluorescence measurement component (6) completes preheating, the water flow at the bottom of the inner cavity of the sample holding shell (11) is discharged through the drain pipe (12). In this process, water continuously seeps through the rock and soil sample, and the fluorescent diluent at the bottom of the inner cavity of the sample holding shell (11) is continuously diluted. The fluorescence measurement component (6) reads and stores the recorded fluorescent agent concentration value in real time, and the data processing is performed at the terminal to determine the infiltration flow rate of the rock and soil sample to be measured; S3. After the measurement is completed, the driving motor (23) drives the driving screw (21) to continue to rotate counterclockwise. At this time, the discharging scraper (41) continues to descend along the guide rod (42). During the descent of the discharging scraper (41), the first spring (32) pushes the first closing tube (31), thereby causing the first closing tube (31) to close the first water outlet (25). As the discharging scraper (41) continues to descend, the discharging scraper (41) enters the inner side of the sample holding shell (11). At this time, the first guide rail (44) enters the inner side of the guide groove (43) and cooperates with the guide rod (42) to synchronously guide the discharging scraper (41); S4. When the discharge scraper (41) descends a distance that reaches a first threshold, the discharge scraper (41) contacts the rock and soil sample. Subsequently, as the discharge scraper (41) continues to descend, the rock and soil sample is continuously pushed downward. When the rock and soil sample moves downward, it pushes the lifting frame (51), thereby causing the lifting frame (51) to drive the second sealing tube (52) to descend outside the driving screw (21). At the same time, when the lifting frame (51) descends, it drives the sealing plate (57) to gradually release the seal on the entrance of the soil output channel (13), and the rock and soil sample begins to be discharged through the soil output channel (13); S5. When the discharge scraper (41) descends to a second threshold value, the second sealing pipe (52) is driven by the lifting frame (51) to successively release the sealing of the plurality of second water outlet holes (26) and the plurality of third water outlet holes (27). At this time, the water flow inputted from the water supply pipe (22) into the driving screw (21) is continuously outputted through the plurality of second water outlet holes (26) and the plurality of third water outlet holes (27), thereby further diluting the rock and soil sample and making the rock and soil sample more easily discharged. S6. When the discharge scraper (41) descends to a third threshold value, the lifting frame (51) drives the closing plate (57) to completely release the blockage of the soil output channel (13), and the lifting frame (51) can no longer descend. At this time, as the discharge scraper (41) continues to descend, the discharge scraper (41) continuously pushes the diluted rock and soil sample, thereby continuously outputting the rock and soil sample. When the discharge scraper (41) descends to a fourth threshold value, the rock and soil sample is completely discharged, and part of the sewage generated during the dilution process of the rock and soil sample is also discharged through the drain pipe (12). At this time, the discharge scraper (41) and the lifting frame (51) are in a fitted state. During the fitting process of the discharge scraper (41) and the lifting frame (51), the water flow ejected from the second water outlet (26) and the third water outlet (27) completes the cleaning of the bottom of the discharge scraper (41); S7. When the drainage pipe (12) and the soil output channel (13) begin to output clean water, the driving motor (23) drives the driving screw (21) to rotate clockwise through the driving gear (24), thereby driving the discharge scraper (41) to reset. During the reset of the discharge scraper (41), the second spring (56) pushes the lifting frame (51), thereby causing the lifting frame (51) to reset synchronously. When the discharge scraper (41) is completely reset, the technician adds the second rock and soil sample through the top opening of the housing assembly (1) for measurement.

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