Variable-water-pressure fractured rock seepage test device

Abstract

The invention belongs to the technical field of fractured rock testing, and discloses a variable-water-pressure fractured rock seepage testing device which comprises a base, a square plate is arranged at the top end of the base, a pressure sealing chamber is fixedly mounted at the top end of the square plate, and a fractured rock test piece located in the square plate is arranged in the middle of the top end of the base. The bottom end of the plugging ring is in contact with the top end of the fractured rock test piece, so that a gap between the pressure sealing chamber and the fractured rock test piece can be plugged, a water source is prevented from flowing out of the gap between the pressure sealing chamber and the fractured rock test piece during testing, and finally, the plugging ring is driven to descend to plug the gap. Therefore, the sealing performance of the pressure sealing chamber is improved, the accuracy and reliability of the collected data are improved, the water pressure is enhanced through air pressure conduction, the seepage pressure under the high water level amplitude can be simulated, and the seepage pressure is controllable.

Description

Technical Field

[0001] The invention belongs to the technical field of fractured rock testing, in particular to a variable water pressure fractured rock seepage testing device. Background Art

[0002] The drawdown zone of the Three Gorges Reservoir has the characteristics of periodic reservoir water fluctuations, with a water level fluctuation of up to 30 meters, which makes its fractured rock mass subject to significant water pressure fluctuations. In order to deeply understand the hydrogeological process of the drawdown zone, accurately predict potential geological disasters and formulate effective reservoir management and protection strategies, it is crucial to conduct in-depth research on the permeability characteristics of the fractured rock mass in the drawdown zone under continuous changes in water pressure. Therefore, it is necessary to use professional seepage test equipment to accurately test and simulate the rock mass in this special environment.

[0003] There are two traditional rock permeability experiments. The first is a constant head permeability test, which is to measure the permeability and calculate the permeability coefficient under the condition of ensuring that the permeable water level is constant (the water pressure remains unchanged); the second is a variable head permeability test, that is, the permeable water level continues to decrease over time (the water pressure continues to decrease). However, both of these experimental methods are difficult to simulate the reservoir scheduling mechanism of the Three Gorges Reservoir area where the water level fluctuates, and cannot control the characteristics of the rise, fall and maintenance of the permeable water pressure. At the same time, it is difficult to simulate a head condition of thirty meters in the laboratory. Therefore, it is necessary to develop an experimental device with adjustable pressure and easy to implement to improve the simulation accuracy of scientific experiments.

[0004] At present, the traditional fractured rock seepage test device is to place the fractured limestone specimen into a hydraulic sealing chamber and simulate different water pressure environments through hydraulic control. The water body contacts the top of the fractured rock to simulate and observe the permeability law of the fractured rock under different water pressure conditions. After the fractured limestone specimen is placed in the sealing chamber, it is difficult for the specimen to fit completely with the sealing chamber wall, resulting in a tiny gap. During the high-pressure water flow and continuous testing process, water overflows from the gap and becomes a leakage channel. This not only affects the water pressure stability in the sealing chamber, but may also cause changes in the test environment, thereby reducing the accuracy and reliability of the collected data. Summary of the invention

[0005] In order to solve the problem in the above background technology that the test water source may flow out from the gap between the test piece and the sealing chamber, which may reduce the accuracy and reliability of the data, the present invention provides a variable water pressure fracture rock seepage test device.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a variable water pressure fracture rock seepage test device, comprising a base, a square plate is arranged at the top of the base, a pressure sealing chamber is fixedly installed at the top of the square plate, a fractured rock test piece located at the square plate and inside the square plate is arranged in the middle of the top of the base, a water inlet pipe is arranged at the top of the pressure sealing chamber, an air inlet pipe is arranged on the left side of the pressure sealing chamber, square grooves are opened inside the left and right ends of the pressure sealing chamber, and a pressure gauge is arranged at the left end of the base;

[0007] A blocking mechanism is arranged at the top of the inside of the square groove, and the blocking mechanism includes a spring A, which is fixedly connected to the top of the inside of the square groove, and a movable plate A is fixedly installed at the bottom end of the spring A, and a fixed plate A is fixedly installed on the opposite side of the movable plate A, and a blocking ring located inside the pressure sealing chamber is fixedly installed on the opposite side of the fixed plate A, and a roller A is rotatably connected to the bottom end of the inside of the square groove, and a belt located on the surface of the limiting wheel is fixedly installed on the surface of the roller A, and a threaded rod is rotatably connected to the inside of the spring A, and a threaded block is threadedly connected to the surface of the threaded rod, and a roller B is rotatably connected to the front end of the threaded block, and the other end of the belt is fixedly connected to the surface of the roller B, and the threaded rod penetrates the pressure sealing chamber upward and is fixedly installed with a transmission wheel, and the number of the transmission wheels is two, and the surfaces of the two transmission wheels are threadedly connected with synchronous belts, and a motor A is fixedly installed on the top of the base, and the output end of the motor A is fixedly connected to the top of the synchronous belt at the right end.

[0008] Preferably, it also includes: a flow guide mechanism, which is arranged inside the pressure sealing chamber, the flow guide mechanism includes a mounting plate, the mounting plate is fixedly connected to the inside of the pressure sealing chamber, a conical shell is fixedly installed inside the pressure sealing chamber, a water flow pipe located at the top of the mounting plate is fixedly installed at the bottom end of the conical shell, the top of the mounting plate is rotatably connected to a connecting rod located at the rear end of the water flow pipe, the connecting rod passes through the pressure sealing chamber upward and is fixedly installed with a gear A meshing with a synchronous belt, the top of the mounting plate is rotatably connected to a worm gear, and a worm meshing with the worm gear is fixedly installed on the surface of the connecting rod A square shell located on the left side of the worm gear is fixedly installed on the top of the mounting plate, a gear B located inside the square shell is fixedly installed on the left side of the worm gear, a rack meshing with the gear B is slidably connected inside the square shell, a guide plate is rotatably connected inside the water flow tube, a sliding shell located outside the water flow tube is fixedly installed at the rear end of the guide plate, a slider A is slidably connected inside the sliding shell, a fixed plate B is fixedly installed at the rear end of the fixed plate B, a connecting plate is fixedly installed at the rear end of the fixed plate B, and the connecting plate extends to the left to the inside of the square shell and is fixedly connected to the right side of the rack.

[0009] Preferably, it also includes: a fixing mechanism, which is arranged at the top of the base and the square plate, the fixing mechanism includes a slot, the slot is opened at the top of the base and the square plate, a plug plate is inserted inside the slot, springs B are fixedly installed at the front and rear ends of the top of the square plate, a movable plate B is fixedly installed on the opposite side of the spring B, and limit blocks are fixedly installed at the front and rear ends of the opposite side of the movable plate B, mounting blocks are fixedly installed at the front and rear ends of the top of the square plate, a bidirectional screw rod is rotatably connected inside the mounting block, extrusion shells are threadedly connected at both ends of the surface of the bidirectional screw rod, a gear C is fixedly installed on the middle part of the surface of the bidirectional screw rod, a motor B is fixedly installed at the front and rear ends of the top of the square plate, and a gear D meshing with the gear C is fixedly installed at the output end of the motor B.

[0010] Preferably, a limiting groove located at the bottom end of the extrusion shell is opened at the top of the square plate, and a slider B is slidably connected inside the limiting groove. The number of sliders B is four, and the top of the slider B is fixedly connected to the bottom end of the extrusion shell.

[0011] Preferably, a slide groove is provided at the rear end of the square groove, a support block is slidably connected inside the slide groove, the front end of the support block is fixedly connected to the rear end of the threaded block, the support block is T-shaped, and the size of the support block is adapted to the slide groove.

[0012] Preferably, a filter hole is provided at the top of the base, a placement groove is provided at the left side of the base, and a collecting groove is slidably connected inside the placement groove.

[0013] Preferably, a blocking plate located on the guide plate is fixedly installed inside the water flow tube, a gap is provided between the water flow tube and the guide plate, and the blocking plate is of arc-shaped design.

[0014] Preferably, a square hole is opened on the right side of the square shell, and the connecting plate can slide inside the square hole.

[0015] Preferably, there are two limiting wheels, and the surfaces of the limiting wheels are designed to be smooth.

[0016] Preferably, a stopper is fixedly mounted on the surface of the bidirectional screw rod, and opposite sides of the stopper are in contact with the opposite side of the mounting block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention drives the transmission wheel at the right end of the motor A to rotate, and then the transmission wheel at the right end drives the synchronous belt and the transmission wheel at the left end to rotate, and then the two transmission wheels drive the threaded rod to rotate, and then the threaded block moves up on the surface of the threaded rod, and then the threaded block drives the roller B to pull the belt to move, and then the belt pulls the roller A and the fixed plate A to descend, and then the fixed plate A drives the blocking ring and the movable plate A to descend, when the movable plate A moves, the spring A is stretched, and then the fixed plate A drives the blocking ring to descend, and then the bottom end of the blocking ring contacts the top of the fractured rock specimen, and then the gap between the pressure sealing chamber and the fractured rock specimen can be blocked, so as to avoid water flowing out of the gap between the pressure sealing chamber and the fractured rock specimen during measurement, and finally the gap is blocked by driving the blocking ring to descend, so as to increase the sealing performance of the pressure sealing chamber, and improve the accuracy and reliability of the collected data, and enhance the water pressure through air pressure conduction, so as to simulate the permeation pressure under the high water level amplitude, and the permeation pressure is controllable;

[0019] The present invention is that when the synchronous belt rotates, the synchronous belt drives the gear A and the connecting rod to rotate, the connecting rod drives the worm to rotate, the worm drives the worm wheel and the gear B to rotate, when the gear B rotates, it drives the rack to move upward, then the rack drives the connecting plate and the fixed plate B to move upward, then the fixed plate B drives the slider A to move inside the sliding shell, then the slider A pulls the sliding shell to rotate, the sliding shell drives the guide plate to rotate, and when the blocking ring blocks the equipment, the guide plate is always in an inclined state, and then the guide plate can guide the water source to the top of the fractured rock specimen, thereby being able to more accurately simulate the process of rainwater or groundwater penetrating downward through surface cracks in nature, and is helpful to more realistically reflect the seepage characteristics of fractured rocks under variable water pressure conditions;

[0020] The present invention inserts the plug plate into the slot, and then drives the motor B to rotate the gear D, and then the gear D drives the gear C and the bidirectional screw to rotate, the extrusion shell moves toward each other on the surface of the bidirectional screw, and then the opposite side of the extrusion shell contacts the surface of the movable plate B, and then the extrusion shell pushes the movable plate B and the limit block to move, and then the limit block enters the plug plate, and then the plug plate can be fixed in the slot, and then the plug plate can fix the square plate and the pressure sealing chamber at the top of the base, and finally the limit block enters the slot by driving the motor B, so that the square plate and the pressure sealing chamber are conveniently fixed, thereby increasing the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of a cross-sectional base of the present invention;

[0023] Figure 3 It is a schematic diagram of a cross-sectional pressure sealing chamber of the present invention;

[0024] Figure 4 This is a schematic diagram showing the interior of a square groove of the present invention;

[0025] Figure 5 This is a schematic diagram of the interior of the pressure sealing chamber of the present invention from a rear view;

[0026] Figure 6 This is a schematic diagram of a cross-sectional view of a water flow tube according to the present invention;

[0027] Figure 7 This is a schematic diagram of a cross-sectional square shell of the present invention;

[0028] Figure 8 It is a schematic diagram showing the filter holes of the present invention;

[0029] Fig. 9 For the present invention Figure 2 A is an enlarged schematic diagram.

[0030] In the figure: 1, base; 2, square plate; 3, pressure sealing chamber; 4, water inlet pipe; 5, air inlet pipe; 6, square groove; 7, spring A; 8, moving plate A; 9, fixed plate A; 10, blocking ring; 11, roller A; 12, belt; 13, limit wheel; 14, threaded rod; 15, threaded block; 16, roller B; 17, transmission wheel; 18, synchronous belt; 19, motor A; 20, connecting rod; 21, gear A; 22, mounting plate; 23, conical shell; 24, water flow tube; 25, guide plate; 26, sliding shell; 27, slider A; 28, fixed plate B; 29. Connecting plate; 30. Worm; 31. Worm wheel; 32. Square shell; 33. Gear B; 34. Rack; 35. Slot; 36. Insert plate; 37. Spring B; 38. Moving plate B; 39. Limit block; 40. Mounting block; 41. Bidirectional screw rod; 42. Extrusion shell; 43. Gear C; 44. Motor B; 45. Gear D; 46. Limit groove; 47. Slider B; 48. Slide groove; 49. Support block; 50. Filter hole; 51. Placement groove; 52. Collecting groove; 53. Fracture rock specimen; 54. Blocking plate; 55. Block; 56. Pressure gauge. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 9As shown, the present invention provides a variable water pressure fracture rock seepage test device, comprising a base 1, a square plate 2 is arranged at the top of the base 1, a pressure sealing chamber 3 is fixedly installed at the top of the square plate 2, a fracture rock test piece 53 located at the square plate 2 and inside the square plate 2 is arranged in the middle of the top of the base 1, a water inlet pipe 4 is arranged at the top of the pressure sealing chamber 3, an air inlet pipe 5 is arranged on the left side of the pressure sealing chamber 3, square grooves 6 are opened inside the left and right ends of the pressure sealing chamber 3, and a pressure gauge 56 is arranged at the left end of the base 1;

[0033] The blocking mechanism is arranged at the top of the square groove 6. The blocking mechanism includes a spring A7, which is fixedly connected to the top of the square groove 6. A movable plate A8 is fixedly installed at the bottom end of the spring A7. A fixed plate A9 is fixedly installed on the opposite side of the movable plate A8. A blocking ring 10 located inside the pressure sealing chamber 3 is fixedly installed on the opposite side of the fixed plate A9. A roller A11 is rotatably connected to the bottom end of the fixed plate A9. A limiting wheel 13 is rotatably connected to the bottom end of the square groove 6. A stopper 13 is fixedly installed on the surface of the roller A11. The belt 12 and the spring A7 are rotatably connected to a threaded rod 14 inside, and a threaded block 15 is threadedly connected to the surface of the threaded rod 14. The front end of the threaded block 15 is rotatably connected to a roller B16. The other end of the belt 12 is fixedly connected to the surface of the roller B16. The threaded rod 14 penetrates the pressure sealing chamber 3 upward and is fixedly installed with a transmission wheel 17. There are two transmission wheels 17. The surfaces of the two transmission wheels 17 are threadedly connected to synchronous belts 18. A motor A19 is fixedly installed on the top of the base 1, and the output end of the motor A19 is fixedly connected to the top of the right-end synchronous belt 18.

[0034] Adopting the above scheme: after placing the fractured rock specimen 53 into the square plate 2 and the pressure sealing chamber 3, the operator can drive the motor A19 to rotate the transmission wheel 17 at the right end. Since the surface of the transmission wheel 17 is connected with the synchronous belt 18, when the transmission wheel 17 at the right end rotates, the synchronous belt 18 and the transmission wheel 17 at the left end will be driven to rotate, and then the two transmission wheels 17 will drive the threaded rod 14 to rotate. Since the threaded rod 14 is threadedly connected with the threaded block 15, when the threaded rod 14 rotates, the threaded block 15 moves upward, and then the threaded block 15 drives the roller B16 to move, and then the roller B16 pulls the belt 1 2. When the belt 12 moves, the limiting wheel 13 rotates due to the friction between the belt 12 and the limiting wheel 13, and then the belt 12 pulls the roller A11 and the fixed plate A9 down, and the fixed plate A9 drives the moving plate A8 to move. When the moving plate A8 moves, the spring A7 is stretched, and then the fixed plate A9 drives the blocking ring 10 down, and then the bottom end of the blocking ring 10 contacts the surface of the fractured rock specimen 53, thereby blocking the gap between the fractured rock specimen 53 and the pressure sealing chamber 3, so as to prevent water from flowing out of the gap between the fractured rock specimen 53 and the pressure sealing chamber 3 during the test;

[0035] After the plugging is completed, the valves on the surface of the water control valve 4 and the air control valve 5 can be opened, and then water can be pumped into the water inlet pipe 4, and then the water source will enter the pressure sealing chamber 3, and then the gas can be filled into the air inlet pipe 5, and then the gas will enter the pressure sealing chamber 3, thereby increasing the water pressure, and then the operator can observe the pressure gauge 56 on the left side of the device to make the air pressure value inside the pressure sealing chamber 3 reach the specified range, and then the water source will fall on the top of the fractured rock specimen 53, and then the permeation phenomenon of the fractured rock specimen 53 under variable water pressure can be simulated, and the influence of different permeation water pressures on the permeability coefficient and water conductivity of the fractured rock specimen 53 can be analyzed.

[0036] like Figure 5 , Figure 6 and Figure 7As shown, it also includes: a flow guide mechanism, which is arranged inside the pressure sealing chamber 3, and the flow guide mechanism includes a mounting plate 22, the mounting plate 22 is fixedly connected to the inside of the pressure sealing chamber 3, and a conical shell 23 is fixedly installed inside the pressure sealing chamber 3. The bottom end of the conical shell 23 is fixedly installed with a water flow pipe 24 located at the top of the mounting plate 22, and the top of the mounting plate 22 is rotatably connected to a connecting rod 20 located at the rear end of the water flow pipe 24. The connecting rod 20 passes through the pressure sealing chamber 3 upward and is fixedly installed with a gear A21 meshing with the synchronous belt 18. The top of the mounting plate 22 is rotatably connected to a worm gear 31, and a worm 30 meshing with the worm gear 31 is fixedly installed on the surface of the connecting rod 20. A square shell 32 located on the left side of the worm gear 31 is fixedly installed on the top of the plate 22, a gear B33 located inside the square shell 32 is fixedly installed on the left side of the worm gear 31, a rack 34 meshing with the gear B33 is slidably connected inside the square shell 32, a guide plate 25 is rotatably connected inside the water flow tube 24, a sliding shell 26 located outside the water flow tube 24 is fixedly installed at the rear end of the guide plate 25, a slider A27 is slidably connected inside the sliding shell 26, a fixed plate B28 is fixedly installed at the rear end of the slider A27, a connecting plate 29 is fixedly installed at the rear end of the fixed plate B28, the connecting plate 29 extends to the left to the interior of the square shell 32 and is fixedly connected to the right side of the rack 34.

[0037] The above scheme is adopted: through the design of the guide mechanism, during the rotation of the synchronous belt 18, since the gear A21 is meshed with the synchronous belt 18, when the synchronous belt 18 rotates, the gear A21 will be driven to rotate, the gear A21 will drive the connecting rod 20 to rotate, the connecting rod 20 will drive the worm 30 to rotate, because the worm 30 is meshed with the worm wheel 31, the worm 30 will drive the worm wheel 31 to rotate, the worm wheel 31 will drive the gear B33 to rotate, and then the gear B33 will drive the rack 34 to move upward, then the rack 34 will drive the connecting plate 29 to move upward, and then the connecting plate 29 will drive the fixed plate B28 to move upward, and the fixed plate B28 will drive the slider A27 in the sliding shell 26. The fixed plate B28 will drive the sliding shell 26 to rotate, and then the sliding shell 26 will drive the guide plate 25 to rotate, and then the two guide plates 25 will tilt, and when the sealing ring 10 blocks the equipment, the synchronous belt 18 will stop rotating, and the guide plate 25 will remain in a tilted state, and then when the water source enters the interior of the pressure sealing chamber 3, it will flow into the interior of the conical shell 23 and the water flow tube 24, and then the water source will contact the inclined guide plate 25, and then the guide plate 25 will guide the water source to the top of the fractured rock specimen 53, preventing the water source from flowing to the gap between the fractured rock specimen 53 and the pressure sealing chamber 3, thereby ensuring the accuracy of the test data.

[0038] like Figure 1 and Figure 2As shown, it also includes: a fixing mechanism, which is arranged at the top of the base 1 and the square plate 2, the fixing mechanism includes a slot 35, the slot 35 is opened at the top of the base 1 and the square plate 2, and a plug plate 36 is inserted inside the slot 35, springs B37 are fixedly installed at the front and rear ends of the top of the square plate 2, a moving plate B38 is fixedly installed on the side facing the spring B37, and a limiting block 39 is fixedly installed at the front and rear ends of the moving plate B38 on the opposite side, and a mounting block 40 is fixedly installed at the front and rear ends of the top of the square plate 2, and a bidirectional screw rod 41 is rotatably connected inside the mounting block 40, and both ends of the surface of the bidirectional screw rod 41 are threadedly connected with an extrusion shell 42, and a gear C43 is fixedly installed in the middle of the surface of the bidirectional screw rod 41, and a motor B44 is fixedly installed at the front and rear ends of the top of the square plate 2, and a gear D45 meshing with the gear C43 is fixedly installed at the output end of the motor B44.

[0039] Adopt the above scheme: through the design of the fixed structure, after the fractured rock specimen 53 is placed in the middle of the top of the base 1, the square plate 2 and the pressure sealing chamber 3 can be placed on the surface of the fractured rock specimen 53, and then the slots 35 at the top of the base 1 and the square plate 2 will overlap, and then the plug-in plate 36 can be inserted into the inside of the slot 35. After the plug-in is completed, the motor B44 can be driven to rotate the gear D45, because the gear D45 is meshed with the gear C43, and then the gear D45 will drive the gear C43 and the bidirectional screw 41 to rotate. Due to the extrusion shell 42 is threadedly connected to the bidirectional screw 41, and when the bidirectional screw 41 rotates, the extrusion shell 42 will move toward each other, and then the opposite side of the extrusion shell 42 will contact the surface of the movable plate B38, and will push the movable plate B38 and the limit block 39 to move toward each other. When the movable plate B38 moves, the spring B37 will be stretched, and then the surface of the limit block 39 will enter the interior of the plug plate 36, thereby fixing the plug plate 36, and the plug plate 36 can fix the square plate 2 and the pressure sealing chamber 3 to the top of the base 1, thereby increasing the stability of the equipment test.

[0040] like Figure 2 As shown, a limiting groove 46 located at the bottom end of the extrusion shell 42 is opened at the top of the square plate 2, and a slider B47 is slidably connected inside the limiting groove 46. There are four sliders B47, and the top of the slider B47 is fixedly connected to the bottom end of the extrusion shell 42.

[0041] The above-mentioned scheme is adopted: through the design of the limit groove 46 and the slider B47, when the extrusion shell 42 moves, the extrusion shell 42 will drive the slider B47 to move inside the limit groove 46, and then when the slider B47 moves, the moving direction of the extrusion shell 42 can be limited, and the surface of the slider B47 fits with the inner wall of the limit groove 46, so that the extrusion shell 42 can be limited.

[0042] like Figure 4 and Figure 8As shown, a slide groove 48 is provided at the rear end inside the square groove 6, and a support block 49 is slidably connected inside the slide groove 48. The front end of the support block 49 is fixedly connected to the rear end of the threaded block 15. The support block 49 is T-shaped, and the size of the support block 49 is compatible with the slide groove 48. A filter hole 50 is provided at the top of the base 1, and a placement groove 51 is provided on the left side of the base 1. The inside of the placement groove 51 is slidably connected to the collecting groove 52.

[0043] The above scheme is adopted: through the design of the chute 48 and the support block 49, when the threaded block 15 moves, the support block 49 will move inside the chute 48. Since the support block 49 is a T-shaped design, the threaded block 15 can be limited and the stability of the movement of the threaded block 15 can be increased. Through the design of the filter hole 50, the placement groove 51 and the collection groove 52, after the water source passes through the inside of the fractured rock specimen 53, it will pass through the filter hole 50 and then flow into the inside of the collection groove 52. Then the collection groove 52 can collect the generated water source, and then the permeability coefficient and water conductivity coefficient of the fractured rock can be calculated according to the collected seepage amount.

[0044] like Figure 6 and Figure 7 As shown, a blocking plate 54 located on the guide plate 25 is fixedly installed inside the water flow tube 24, a gap is set between the water flow tube 24 and the guide plate 25, the blocking plate 54 is an arc-shaped design, a square hole is opened on the right side of the square shell 32, and the connecting plate 29 can slide inside the square hole.

[0045] The above scheme is adopted: through the design of the blocking plate 54, since the blocking plate 54 is arranged at the top of the guide plate 25, and the blocking plate 54 is designed to be arc-shaped, after the water source enters the water flow tube 24, the blocking plate 54 will guide the water source to the top of the inclined guide plate 25, thereby preventing the water source from flowing out from the gap between the guide plate 25 and the water flow tube 24. Through the design of the square shell 32, since a square hole is opened on the right side of the square shell 32, when the connecting plate 29 moves, it will slide inside the square hole, and the square shell 32 will not interfere with the movement of the connecting plate 29.

[0046] like Figure 4 and Fig. 9 As shown, there are two limit wheels 13 , and the surface of the limit wheels 13 is smooth. A stopper 55 is fixedly mounted on the surface of the bidirectional screw rod 41 , and opposite sides of the stopper 55 are in contact with the opposite side of the mounting block 40 .

[0047] The above scheme is adopted: through the design of the limiting wheel 13, since there are two limiting wheels 13, the belt 12 can be made to move more smoothly, and the belt 12 can be limited to avoid the position of the belt 12 from shifting. Through the design of the stop block 55, since the surface of the stop block 55 is in contact with the surface of the mounting block 40, the bidirectional screw rod 41 can be limited to avoid its position from moving when the bidirectional screw rod 41 rotates.

[0048] The working principle and use process of the present invention:

[0049] First, the operator can put the cracked rock specimen 53 in the middle of the top of the base 1, and then put the square plate 2 and the pressure sealing chamber 3 on the surface of the cracked rock specimen 53, and then make the two slots 35 overlap, and then insert the plug plate 36 into the inside of the slot 35, and then drive the motor B44 to rotate the gear D45, and then the gear D45 will drive the gear C43 and the two-way screw 41 to rotate, and the extrusion shell 42 will move towards each other on the surface of the two-way screw 41, and then the opposite side of the extrusion shell 42 will contact the surface of the moving plate B38, and then the extrusion shell 42 will push the moving plate B38 and the limit block 39 to move, and when the moving plate B38 moves, the spring B37 will be stretched, and then the limit block 39 will enter the inside of the plug plate 36, and then the plug plate 36 can be fixed inside the slot 35, and then the plug plate 36 can fix the square plate 2 and the pressure sealing chamber 3 on the top of the base 1;

[0050] Then the transmission wheel 17 at the right end of the motor A19 can be driven to rotate, and then the transmission wheel 17 at the right end will drive the synchronous belt 18 and the transmission wheel 17 at the left end to rotate, and then the two transmission wheels 17 will drive the threaded rod 14 to rotate, and then the threaded block 15 will move up on the surface of the threaded rod 14, and then the threaded block 15 will drive the roller B16 to pull the belt 12 to move, and then the belt 12 will pull the roller A11 and the fixed plate A9 down, and then the fixed plate A9 will drive the blocking ring 10 and the moving plate A8 to move down, when the moving plate A8 moves, the spring A7 will be stretched, and then the fixed plate A9 will drive the blocking ring 10 to move down, and then the bottom end of the blocking ring 10 will contact the top of the fractured rock specimen 53, and then the gap between the pressure sealing chamber 3 and the fractured rock specimen 53 can be blocked to prevent water from flowing out of the gap between the pressure sealing chamber 3 and the fractured rock specimen 53 during measurement;

[0051] When the synchronous belt 18 rotates, the synchronous belt 18 drives the gear A21 and the connecting rod 20 to rotate, the connecting rod 20 drives the worm 30 to rotate, the worm 30 drives the worm wheel 31 and the gear B33 to rotate, when the gear B33 rotates, it drives the rack 34 to move upward, then the rack 34 drives the connecting plate 29 and the fixed plate B28 to move upward, then the fixed plate B28 drives the slider A27 to move inside the sliding shell 26, then the slider A27 pulls the sliding shell 26 to rotate, the sliding shell 26 drives the guide plate 25 to rotate, and when the blocking ring 10 blocks the equipment, the guide plate 25 will always be in a tilted state; then Water is pumped into the pressure sealing chamber 3. After the water source enters the pressure sealing chamber 3, gas is pumped into the pressure sealing chamber 3 to increase the water pressure. Then the air pressure value inside the pressure sealing chamber 3 reaches the specified range, and then the water source will flow into the conical shell 23 and the water flow tube 24. Then the water source will contact the inclined guide plate 25, and then the guide plate 25 will guide the water source to the top of the fractured rock specimen 53. Then the infiltration phenomenon of the fractured rock specimen 53 under variable water pressure can be simulated, the seepage mass under different seepage pressures can be weighed, and the seepage water that passes through the filter hole 50 and flows into the collection tank 52 is collected, and finally the operation process is completed.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable water pressure fracture rock seepage test device, comprising a base (1), characterized in that: A square plate (2) is arranged at the top of the base (1), a pressure sealing chamber (3) is fixedly installed at the top of the square plate (2), a cracked rock specimen (53) located inside the square plate (2) and inside the square plate (2) is arranged in the middle of the top of the base (1), a water inlet pipe (4) is arranged at the top of the pressure sealing chamber (3), an air inlet pipe (5) is arranged on the left side of the pressure sealing chamber (3), square grooves (6) are provided inside the left and right ends of the pressure sealing chamber (3), and a pressure gauge (56) is arranged at the left end of the base (1); A blocking mechanism is arranged at the top of the square groove (6), the blocking mechanism comprises a spring A (7), the spring A (7) is fixedly connected to the top of the square groove (6), a movable plate A (8) is fixedly installed at the bottom end of the spring A (7), a fixed plate A (9) is fixedly installed on the opposite side of the movable plate A (8), a blocking ring (10) located inside the pressure sealing chamber (3) is fixedly installed on the opposite side of the fixed plate A (9), a roller A (11) is rotatably connected to the bottom end of the square groove (6), a limiting wheel (13) is rotatably connected to the bottom end of the square groove (6), a belt (10) located on the surface of the limiting wheel (13) is fixedly installed on the surface of the roller A (11) 2), the inner part of the spring A (7) is rotatably connected to a threaded rod (14), the surface of the threaded rod (14) is threadedly connected to a threaded block (15), the front end of the threaded block (15) is rotatably connected to a roller B (16), the other end of the belt (12) is fixedly connected to the surface of the roller B (16), the threaded rod (14) passes through the pressure sealing chamber (3) upward and is fixedly installed with a transmission wheel (17), the number of the transmission wheels (17) is two, the surfaces of the two transmission wheels (17) are threadedly connected to synchronous belts (18), the top end of the base (1) is fixedly installed with a motor A (19), the output end of the motor A (19) is fixedly connected to the top end of the synchronous belt (18) at the right end.

2. The variable water pressure fracture rock seepage test device according to claim 1, characterized in that: The invention also comprises: a flow guiding mechanism, which is arranged inside the pressure sealing chamber (3), the flow guiding mechanism comprises a mounting plate (22), the mounting plate (22) is fixedly connected to the inside of the pressure sealing chamber (3), a conical shell (23) is fixedly installed inside the pressure sealing chamber (3), a water flow pipe (24) located at the top of the mounting plate (22) is fixedly installed at the bottom end of the conical shell (23), the top of the mounting plate (22) is rotatably connected to a connecting rod (20) located at the rear end of the water flow pipe (24), the connecting rod (20) passes through the pressure sealing chamber (3) upward and is fixedly installed with a gear A (21) meshing with a synchronous belt (18), the top of the mounting plate (22) is rotatably connected to a worm gear (31), the surface of the connecting rod (20) is fixedly installed with a worm gear (30) meshing with the worm gear (31), and the mounting plate (2 2) is fixedly mounted on the top of a square shell (32) located on the left side of a worm gear (31), a gear B (33) located inside the square shell (32) is fixedly mounted on the left side of the worm gear (31), a rack (34) meshing with the gear B (33) is slidably connected inside the square shell (32), a guide plate (25) is rotatably connected inside the water flow tube (24), a sliding shell (26) located outside the water flow tube (24) is fixedly mounted on the rear end of the guide plate (25), a slider A (27) is slidably connected inside the sliding shell (26), a fixed plate B (28) is fixedly mounted on the rear end of the slider A (27), a connecting plate (29) is fixedly mounted on the rear end of the fixing plate B (28), and the connecting plate (29) extends leftward to the inside of the square shell (32) and is fixedly connected to the right side of the rack (34).

3. The variable water pressure fracture rock seepage test device according to claim 1, characterized in that: The invention also comprises: a fixing mechanism, which is arranged at the top of the base (1) and the square plate (2), the fixing mechanism comprising a slot (35), the slot (35) being opened at the top of the base (1) and the square plate (2), a plug plate (36) being inserted into the slot (35), springs B (37) being fixedly installed at both the front and rear ends of the top of the square plate (2), a moving plate B (38) being fixedly installed on the side facing the spring B (37), and a limit block (36) being fixedly installed at both the front and rear ends of the side facing the moving plate B (38). 39), the front and rear ends of the top of the square plate (2) are fixedly mounted with mounting blocks (40), the interior of the mounting block (40) is rotatably connected with a bidirectional screw rod (41), both ends of the surface of the bidirectional screw rod (41) are threadedly connected with an extrusion shell (42), a gear C (43) is fixedly mounted in the middle of the surface of the bidirectional screw rod (41), the front and rear ends of the top of the square plate (2) are fixedly mounted with a motor B (44), and the output end of the motor B (44) is fixedly mounted with a gear D (45) meshing with the gear C (43).

4. The variable water pressure fracture rock seepage test device according to claim 1, characterized in that: The top of the square plate (2) is provided with a limiting groove (46) located at the bottom end of the extrusion shell (42), and a slider B (47) is slidably connected inside the limiting groove (46). The number of the sliders B (47) is four, and the top of the slider B (47) is fixedly connected to the bottom end of the extrusion shell (42).

5. The variable water pressure fracture rock seepage test device according to claim 1, characterized in that: A slide groove (48) is provided at the rear end inside the square groove (6), and a support block (49) is slidably connected inside the slide groove (48). The front end of the support block (49) is fixedly connected to the rear end of the threaded block (15). The support block (49) is T-shaped, and the size of the support block (49) is adapted to the slide groove (48).

6. The variable water pressure fracture rock seepage test device according to claim 1, characterized in that: A filter hole (50) is provided at the top of the base (1), a placement groove (51) is provided at the left side of the base (1), and a collecting groove (52) is slidably connected inside the placement groove (51).

7. The variable water pressure fracture rock seepage test device according to claim 2, characterized in that: A blocking plate (54) located on the guide plate (25) is fixedly installed inside the water flow pipe (24), a gap is provided between the water flow pipe (24) and the guide plate (25), and the blocking plate (54) is of arc-shaped design.

8. The variable water pressure fracture rock seepage test device according to claim 2, characterized in that: A square hole is opened on the right side of the square shell (32), and the connecting plate (29) can slide inside the square hole.

9. The variable water pressure fracture rock seepage test device according to claim 1, characterized in that: The number of the limiting wheels (13) is two, and the surfaces of the limiting wheels (13) are designed to be smooth.

10. The variable water pressure fracture rock seepage test device according to claim 3, characterized in that: A stopper (55) is fixedly mounted on the surface of the bidirectional screw rod (41), and opposite sides of the stopper (55) are in contact with the opposite side of the mounting block (40).

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