Rock fracture flow test device

Abstract

The rock fissure seepage test device is disclosed, which comprises a cylinder, a cover plate is arranged on the top of the cylinder, a deviation rectifying block for placing an upper rock sample is accommodated in the cylinder, and a bottom plate for placing a lower rock sample is arranged at the bottom of the cylinder; a gap for water seepage of the rock sample is left between the deviation rectifying block and the bottom plate, a water passing hole passing through the lower rock sample is formed in the bottom plate, a first joint connected with a water inlet pipe is arranged on the bottom plate, a drain hole is arranged on the cylinder, and a second joint connected with the drain hole is arranged on the cylinder; an adjusting rod is threadedly inserted on the cover plate, and the bottom of the adjusting rod is detachably arranged on the top of the deviation rectifying block through a locking mechanism; the locking mechanism arranged between the adjusting rod and the deviation rectifying block can conveniently realize the dismounting and mounting of the adjusting rod on the deviation rectifying block, time and labor are saved, the test efficiency is improved, the connection stability of the adjusting rod after being mounted on the deviation rectifying block is improved, and the device is safe and reliable.

Description

Technical Field

[0001] This invention relates to a test apparatus, and more particularly to a test apparatus for rock fissure seepage. Background Technology

[0002] Chinese utility model patent CN2874496Y discloses a rock radial fracture seepage test device with adjustable gap, including an MTS815 or 816 series rock mechanics test system, a cylinder and a cover plate on it, a correction block inside the cylinder, a bottom plate at the bottom, an adjusting rod on the correction block connected to the cover plate, a gap between the correction block and the bottom plate for seepage of rock sample, a water passage hole through which the lower sample passes on the bottom plate and a connector connected to the water inlet pipe, and a drain hole on the cylinder with a drain pipe connector. This patent can automatically adjust the relative position of joint surfaces under water pressure to achieve ideal joint surface parallelism; the parallelism of fracture surfaces can be automatically adjusted and the distance can be manually adjusted. It is suitable for testing rock mechanical properties, has a simple structure, reliable sealing, is easy to use, and has good results, making it widely applicable.

[0003] However, the test device has certain defects: the adjusting rod and the correction block are connected by baffles and screws. This method is not only time-consuming and labor-intensive to assemble, which is very inconvenient and affects the test efficiency, but also the connection between the adjusting rod and the correction block is not stable enough. Summary of the Invention

[0004] To address the technical problems mentioned in the background section, the present invention provides a rock fracture seepage test apparatus.

[0005] This invention is achieved using the following technical solution: a rock fissure seepage test device, comprising a cylinder, a cover plate at the top of the cylinder, a correction block for placing an upper rock sample inside the cylinder, and a base plate for placing a lower rock sample at the bottom of the cylinder; a gap is left between the correction block and the base plate to allow water to seep into the rock sample; a water passage hole is opened on the base plate for the lower rock sample to pass through, and a first connector connected to a water inlet pipe is provided; a drain hole is provided on the cylinder, and a second connector is provided to the drain hole; an adjusting rod is threadedly inserted into the cover plate, and the bottom of the adjusting rod is detachably mounted on the top of the correction block through a locking mechanism.

[0006] As a further improvement to the above solution, the locking mechanism includes two opposing first connecting rods parallel to the adjusting rod. The top of the correction block has a first docking groove for inserting the adjusting rod, and the bottom of the adjusting rod has a groove for the first connecting rod to extend into. Two first slots are opened opposite each other on both sides of the groove. The two first connecting rods are elastically connected on the side that is close to each other, and a first locking block is provided on the side that is far apart from each other. The correction block is provided with an actuating component, which can drive the two first connecting rods to move horizontally away from each other, so that the two first locking blocks are respectively engaged with the two first slots.

[0007] As a further improvement to the above solution, a first spring is provided between the two first connecting rods. When the first spring does not deform, the two first connecting rods are in a state of close proximity to each other.

[0008] As a further improvement to the above solution, the actuation component includes a toothed ring rotatably disposed on the top of the correction block, the toothed ring surrounding the first docking groove; two racks are staggered and oppositely disposed on both sides of the toothed ring, respectively meshing with the two sides of the outer periphery of the ring; a second connecting rod parallel to the adjusting rod is disposed at the bottom of each of the two racks; a connecting plate is horizontally disposed at the bottom of each of the two second connecting rods, which moves synchronously with the racks; and the bottoms of the two first connecting rods are respectively fixed to the tops of the two connecting plates.

[0009] As a further improvement to the above solution, the top of the correction block is provided with an annular track groove, and the toothed ring is slidably engaged in the track groove.

[0010] As a further improvement to the above solution, the top of the correction block is provided with a second gear that meshes with the outer periphery of the gear ring. A pulley is coaxially fixed on the second gear. A vertical shaft is also rotatably provided on the correction block. A pulley is sleeved and fixed on the vertical shaft. The two pulleys are connected by a belt drive. A handle is fixed on the top of the vertical shaft.

[0011] As a further improvement to the above solution, the locking mechanism further includes a locking component, which is disposed on the correction block and can lock and fix the rotational position of the vertical shaft when the first locking block is engaged in the first locking slot.

[0012] As a further improvement to the above solution, the locking assembly includes a first gear rotatably disposed on the top of the correction block, the first gear cooperating with one of the racks, a connecting shaft perpendicular to the corresponding rack being horizontally inserted at the center of the first gear, a cylinder being sleeved and fixed on the outside of the connecting shaft, a first limiting groove in the spiral shape being axially opened on the outer periphery of the cylinder, a moving block that can move along the axial direction of the connecting shaft being slidably engaged on the correction block, a first limiting block being disposed on the top of the moving block and engaging with the first limiting groove, a second locking block being elastically disposed on one side of the moving block, a disc being sleeved and fixed on the vertical shaft, and a plurality of second locking grooves being evenly opened around the outer periphery of the disc;

[0013] When the racks move away from each other, the first gear and connecting shaft will drive the cylinder to rotate, causing the moving block to move into the second slot under the limiting action of the first limiting block and the first limiting groove.

[0014] As a further improvement to the above solution, the groove wall near the groove opening in the second slot has an outwardly flared slope, and one end of the second card block has an inclined surface that matches the slope.

[0015] As a further improvement to the above solution, the other end of the second card block is inserted into the corresponding side wall of the moving block by a second spring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The rock fracture seepage test device of the present invention, by setting a locking mechanism between the adjusting rod and the correction block, can conveniently realize the installation and removal of the adjusting rod on the correction block, saving time and effort, improving test efficiency, and improving the connection stability of the adjusting rod after installation on the correction block, making it safe and reliable.

[0018] 2. The rock fracture seepage test device of the present invention, by setting the action component, only needs to rotate the vertical shaft to realize the two first locking blocks in the two first locking slots to be locked and fixed, thereby realizing the mutual fixation between the adjusting rod and the correction block.

[0019] 3. The rock fracture seepage test device of the present invention, by setting a locking component, can effectively fix the rotation angle of the vertical axis after the adjusting rod and the correction block are fixed to each other, ensuring that the adjusting rod can remain stable in the fixed state on the correction block.

[0020] 4. The rock fracture seepage test device of the present invention can further improve the connection stability of the adjusting rod on the correction block by setting up structures such as a pressure rod, a cylinder, and a connecting block. Attached Figure Description

[0021] Figure 1This is a schematic cross-sectional view of the overall structure of the present invention;

[0022] Figure 2 for Figure 1 A partial cross-sectional view of the structure where the adjusting rod and the correction block are connected.

[0023] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0024] Figure 4 for Figure 2 A partial cross-sectional view of the structure where the middle adjusting rod and the correction block are not connected;

[0025] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0026] Figure 6 for Figure 2 A side view of the first locking block, first connecting rod, connecting plate, second connecting rod, and rack.

[0027] Figure 7 for Figure 1 A partial top view of the structure with the central shaft in the locked state;

[0028] Figure 8 for Figure 7 A side view sectional view of the central shaft in an unlocked state;

[0029] Figure 9 for Figure 7 A side view sectional view of the central shaft in the locked state;

[0030] Figure 10 for Figure 3 Enlarged structural diagram at point C.

[0031] Explanation of key symbols:

[0032] 1. Base plate; 2. Cylinder barrel; 3. Cover plate; 4. Correcting block; 5. Upper rock sample; 6. Lower rock sample; 8. First joint; 9. Second joint; 10. Adjusting rod; 11. First mating groove; 12. Groove; 13. First connecting rod; 14. Connecting plate; 15. Second connecting rod; 16. Rack; 17. Track groove; 18. Gear ring; 19. First gear; 20. First slot; 21. First locking block; 22. Connecting shaft; 23. Cylinder body; 4. First limiting groove; 25. Moving block; 26. First limiting block; 27. Second locking block; 28. Disc body; 29. ​​Second locking groove; 30. Vertical shaft; 31. Pulley; 32. Second gear; 33. Pressing rod; 34. Guide groove; 35. Third connecting rod; 36. First slot; 37. Second limiting groove; 38. Second limiting block; 39. Second docking groove; 40. Fourth connecting rod; 41. Screw; 42. Docking block; 43. Cylinder. Detailed Implementation

[0033] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] Example 1

[0035] Please combine Figure 1 A rock fissure seepage test apparatus includes a cylinder 2, a cover plate 3 at the top of the cylinder 2, a guide block 4 for placing an upper rock sample 5 inside the cylinder 2, and a base plate 1 at the bottom of the cylinder 2 for placing a lower rock sample 6. A gap is left between the guide block 4 and the base plate 1 to allow water to seep into the rock sample. A water passage hole is opened on the base plate 1 for the lower rock sample 6 to pass through, and a first connector 8 connected to a water inlet pipe is provided. A drain hole is provided on the cylinder 2, and a second connector 9 connected to the drain hole is provided.

[0036] An adjusting rod 10 is threadedly inserted into the cover plate 3. The bottom of the adjusting rod 10 is detachably mounted on the top of the correction block 4 through a locking mechanism, so that the adjusting rod 10 can be installed and removed from the correction block 4.

[0037] The rock fracture seepage test device of this embodiment is matched with the MTS815 or 816 series rock mechanics test system. It mainly consists of a cover plate 3, a correction block 4, a cylinder 2, a base plate 1, and a first connector 8. The middle part of the correction block 4 is provided with an adjusting rod 10 that is threadedly connected to the cover plate 3. The cylinder 2 is provided with a second connector 9. The cylinder 2 and the base plate 1 are fixed together by bolts, and an O-ring rubber seal is provided between them.

[0038] Two circular rock samples, upper sample 5 and lower sample 6, are cut from the fracture (joint) surface of the rock. A through hole is drilled in the center of the lower sample 6. The lower sample 6, base plate 1, and first joint 8 are bonded together with sealant. The upper sample 5, correction block 4, and second joint 9 are also bonded together with sealant. During bonding, ensure that the joint surfaces of the rock samples are perpendicular to the axes of the base plate 1 and correction block 4, respectively. The adjusting rod 10 is connected to the correction block 4 using a locking mechanism and placed inside the cylinder 2. After initially adjusting the distance between the cover plate 3 and the correction block 4 to a suitable size using the threads of the cover plate 3 and adjusting rod 10, the cover plate 3 is fixed to the cylinder 2. An O-ring is installed between the base plate 1 and the cylinder 2 and fixed with bolts. The distance between the rock samples can be precisely adjusted by rotating the adjusting rod 10 with a screwdriver (the height of the screw protruding from the cover plate 3 is measured with a height vernier caliper). The cylinder 2 has a hole for installing the second joint 9.

[0039] Water enters the gap between the upper and lower rock samples through the first connector 8 and flows radially. It then passes through the gap between the straightening block 4 and the cylinder 2, entering the annular space of the straightening block 4, and finally exits through the second connector 9. The torque applied by rotating the screwdriver allows one to feel the close contact between the joint surfaces of the two rock samples; the height of the screw protruding from the cover plate at this point is measured with calipers. During the seepage test, rotating the adjusting rod 10 changes the gap between the joint surfaces of the two rock samples. This allows for the acquisition of permeability characteristics corresponding to different gaps.

[0040] Please combine Figures 1 to 10 The locking mechanism includes two opposing first connecting rods 13 parallel to the adjusting rod 10. The top of the correction block 4 has a first docking groove 11 for inserting the adjusting rod 10, and the bottom of the adjusting rod 10 has a groove 12 for the first connecting rod 13 to extend into. Two first slots 20 are opened on opposite sides of the groove 12. The two first connecting rods 13 are elastically connected on the side that is close to each other, and a first locking block 21 is provided on the side that is far apart from each other. The correction block 4 is provided with an action component that can drive the two first connecting rods 13 to move horizontally away from each other, so that the two first locking blocks 21 are respectively locked into the two first slots 20, so as to realize the connection and fixation between the first connecting rod 13 and the groove 12, thereby realizing the effective fixation of the adjusting rod 10 on the correction block 4.

[0041] A first spring is provided between the two first connecting rods 13. When the first spring is not deformed, the two first connecting rods 13 are in a state of being close to each other. When the two first connecting rods 13 are far apart, the first spring is in a state of being stretched.

[0042] The actuation component includes a toothed ring 18 rotatably mounted on the top of the correction block 4, the toothed ring 18 surrounding the first docking groove 11. The top of the correction block 4 is provided with an annular track groove 17, and the toothed ring 18 is slidably engaged in the track groove 17.

[0043] Two racks 16 are offset and oppositely arranged on both sides of the toothed ring 18, respectively meshing with the two sides of the outer periphery of the ring. When the toothed ring 18 rotates, it can drive the two racks 16 to move synchronously in opposite directions.

[0044] The bottom of each rack 16 is provided with a second connecting rod 15 parallel to the adjusting rod 10. The bottom of each second connecting rod 15 is provided with a connecting plate 14 that moves synchronously with the rack 16. The bottom of each first connecting rod 13 is fixed to the top of the two connecting plates 14 respectively, and the first connecting rod 13 is located on the side of the connecting plate 14 away from the second connecting rod 15. Thus, the horizontal movement of the rack 16 can be driven by the second connecting rod 15 and the connecting plate 14 to drive the first connecting rod 13 to move horizontally in the same direction synchronously.

[0045] The top of the correction block 4 is provided with a second gear 32 that meshes with the outer periphery of the gear ring 18. A pulley 31 is coaxially fixed on the second gear 32. A vertical shaft 30 is also rotatably provided on the correction block 4. A pulley 31 is sleeved and fixed on the vertical shaft 30. The two pulleys 31 are connected by belt drive. A handle is fixed on the top of the vertical shaft 30.

[0046] The locking mechanism also includes a locking component, which is disposed on the correction block 4. When the first locking block 21 is engaged in the first slot 20, it can lock and fix the rotational position of the vertical shaft 30, so that the first locking block 21 can be stably engaged in the first slot 20, ensuring the connection stability of the adjusting rod 10 on the correction block 4.

[0047] The locking assembly includes a first gear 19 rotatably mounted on the top of the correction block 4. The first gear 19 is vertically mounted and engages with one of the racks 16. The horizontal movement of the rack 16 can drive the first gear 19 to rotate.

[0048] A connecting shaft 22 perpendicular to the corresponding rack 16 is horizontally inserted into the center of the first gear 19. A cylinder 23 is sleeved and fixed on the outside of the connecting shaft 22. A first limiting groove 24 in a spiral shape is axially opened on the outer periphery of the cylinder 23. A moving block 25 that can move along the axial direction of the connecting shaft 22 is slidably locked on the correction block 4. A first limiting block 26 that engages with the first limiting groove 24 is provided on the top of the moving block 25. A second locking block 27 is elastically provided on one side of the moving block 25. A disc 28 is sleeved and fixed on the vertical shaft 30. Multiple second locking grooves 29 are evenly opened around the outer periphery of the disc 28.

[0049] When the racks 16 move away from each other, the cylinder 23 will rotate through the first gear 19 and the connecting shaft 22. Under the limiting action of the first limiting block 26 and the first limiting groove 24, the moving block 25 will drive the second locking block 27 to be locked into the second locking groove 29, thereby effectively fixing the rotational position of the vertical shaft 30 and ensuring the stability of the connection of the adjusting rod 10 on the correction block 4.

[0050] In this embodiment, the groove wall near the groove opening in the second slot 29 has an outwardly flared slope (not shown). One end of the second locking block 27 has an inclined surface (not shown) that matches the slope. The other end of the second locking block 27 is inserted into the corresponding side wall of the moving block 25 through a second spring. When the adjusting rod 10 is removed from the correction block 4, it is only necessary to rotate the vertical shaft 30 in the opposite direction to drive the disc 28 to rotate in the opposite direction. The slope presses the inclined surface of the second locking block 27, forcing the second locking block 27 to smoothly disengage from the corresponding second slot 29, so as to interfere with the reverse movement of the rack 16 and ensure the smooth completion of the removal of the adjusting rod 10 from the correction block 4.

[0051] In this embodiment, the steps for installing the adjusting rod 10 on the correction block 4 are as follows:

[0052] S1. Insert the adjusting rod 10 into the first mating groove 11 of the correction block 4, so that the first connecting rod 13 extends into the groove 12 at the end of the adjusting rod 10, so as to complete the pre-positioning of the adjusting rod 10 on the correction block 4.

[0053] S2. By rotating the vertical shaft 30, the pulley 31 is driven to rotate, and the pulley 31 drives the second gear 32 and the gear ring 18 to rotate via the belt. This causes the two racks 16 to separate synchronously in opposite directions. The two racks 16, through their respective second connecting rods 15, connecting plates 14, and first connecting rods 13, drive the two first locking blocks 21 to engage in the two first locking slots 20, thus completing the locking and fixing of the adjusting rod 10 on the correction block 4.

[0054] At the same time, the movement of rack 16 will drive the first gear 19, connecting shaft 22 and cylinder 23 to rotate, so that the first limiting block 26, under the friction and squeezing action of the spiral-shaped first limiting groove 24, will drive the moving block 25 to move horizontally, so that the second locking block 27 will be locked into the second locking groove 29 on the disc 28 to lock the rotation position of the vertical shaft 30, thereby ensuring the stability of the locking state of the adjusting rod 10 on the correction block 4.

[0055] Example 2

[0056] Please combine Figures 1 to 10 This embodiment is an improvement on Embodiment 1. To further improve the connection stability of the adjusting rod 10 on the correction block 4, two pressing rods 33 parallel to the axis of the adjusting rod 10 are elastically inserted on both sides of the groove 12 at the bottom of the adjusting rod 10. The pressing rods 33 have guide grooves 34, pass through the first slot 20, and the top of the pressing rods 33 is connected to the adjusting rod 10 by a third spring. A third connecting rod 35 that can rotate relative to the bottom of the pressing rods 33 is concentrically provided.

[0057] When the first locking block 21 is not in the first locking slot 20, the guide groove 34 is located in the first locking slot 20, and the third spring is in a non-deformed state. When the first locking block 21 is inserted into the first locking slot 20, the first locking block 21 will also contact and squeeze the guide groove 34 while engaging with the first locking slot 20, causing the pressing rod 33 to drive the third connecting rod 35 to move down (the third spring is in a stretched deformation state), so that the third connecting rod 35 extends to the outside of the bottom of the adjusting rod 10.

[0058] The correction block 4 has a vertical cylinder 43 fixed inside. The top of the cylinder 43 has a first slot 36 for the bottom of the third connecting rod 35 to be inserted. The bottom of the cylinder 43 is threaded with a screw 41. The first slot 36 has a spiral-shaped second limiting groove 37 axially formed on its groove wall. The outer side of the pressing rod 33 near the bottom is fixed with a second limiting block 38 that can slide and engage with the second limiting groove 37. The second limiting groove 37 has a transition opening (not shown) near the opening of the first slot 36 for the second limiting block 38 to enter the second limiting groove 37.

[0059] The bottom of the third connecting rod 35 has a second mating groove 39, and the top of the screw 41 is concentrically fixed with a fourth connecting rod 40. The top of the fourth connecting rod 40 extends into the first slot 36 to engage with the second mating groove 39.

[0060] The connecting plate 14 has a spring-loaded mating block 42 that can slide horizontally on its top. The top of the connecting plate 14 has a groove (not shown), and the mating block 42 slides into the groove. One side of the mating block 42 is connected to the groove wall by a fourth spring. The top of the mating block 42 has a threaded hole (not shown) that mates with the bottom of the screw 41. The fourth spring between the mating block 42 and the groove ensures that even if the connecting plate 14 shifts horizontally during disassembly, the screw 41 can still be smoothly unscrewed from the threaded hole.

[0061] The working principle of this embodiment:

[0062] When the first locking block 21 is engaged in the first locking groove 20, it contacts the compression guide groove 34, causing the pressing rod 33 to move the third connecting rod 35 downward (in the stretched deformation state of the third spring). This causes the third connecting rod 35 to extend to the outside of the bottom of the adjusting rod 10 and insert into the first slot 36. It is then engaged and fixed with the fourth connecting rod 40 through the second mating groove 39, forming a single unit between the third connecting rod 35 and the fourth connecting rod 40. As the third connecting rod 35 extends axially, the second limiting block 38, under the frictional compression of the spiral-shaped second limiting groove 37, forces the third connecting rod 35 to move axially and rotate circumferentially. The fourth connecting rod 40 then drives the screw 41 to extend axially from the bottom of the cylinder 43 until it is screwed into the screw hole at the top of the mating block 42, further fixing the first locking block 21 in the first locking groove 20 to improve the connection stability of the adjusting rod 10 on the correction block 4.

[0063] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A rock fissure seepage test apparatus, comprising a cylinder, a cover plate at the top of the cylinder, a correction block for placing an upper rock sample inside the cylinder, and a base plate for placing a lower rock sample at the bottom of the cylinder; a gap is left between the correction block and the base plate to allow water to seep into the rock sample; a water passage hole is opened on the base plate for the lower rock sample to pass through, and a first connector is provided for connection to a water inlet pipe; a drain hole is provided on the cylinder, and a second connector is provided for connection to the drain hole; an adjusting rod is threadedly inserted into the cover plate, and the bottom of the adjusting rod is detachably mounted on the top of the correction block by a locking mechanism; The locking mechanism includes two opposing first connecting rods parallel to the adjusting rod. The top of the correction block has a first docking groove for inserting the adjusting rod, and the bottom of the adjusting rod has a groove for the first connecting rod to extend into. Two first locking slots are formed on opposite sides of the groove. The two first connecting rods are elastically connected on their sides that are close to each other, and a first locking block is provided on the sides that are far apart. The correction block is provided with an actuating component, which can drive the two first connecting rods to move horizontally away from each other, so that the two first locking blocks are respectively engaged with the two first locking slots. A first spring is provided between the two first links. When the first spring does not deform, the two first links are in a state of close proximity to each other. The actuation component includes a toothed ring rotatably disposed on the top of the correction block, the toothed ring surrounding the first docking groove; two racks are offset and oppositely disposed on both sides of the toothed ring, respectively meshing with the two sides of the outer periphery of the ring; a second connecting rod parallel to the adjusting rod is disposed at the bottom of each of the two racks; a connecting plate is horizontally disposed at the bottom of each of the two second connecting rods, which moves synchronously with the racks; and the bottoms of the two first connecting rods are respectively fixed to the tops of the two connecting plates. The locking mechanism further includes a locking component, which is disposed on the correction block and can lock and fix the rotational position of the vertical shaft when the first card block is engaged into the first card slot. The locking assembly includes a first gear rotatably mounted on the top of the correction block, the first gear engaging with one of the racks, a connecting shaft perpendicular to the corresponding rack being horizontally inserted at the center of the first gear, a cylinder being sleeved and fixed on the outside of the connecting shaft, a first limiting groove in the spiral shape being axially opened on the outer periphery of the cylinder, a moving block that can move axially along the connecting shaft being slidably mounted on the correction block, a first limiting block being mounted on the top of the moving block and engaging with the first limiting groove, a second locking block being elastically mounted on one side of the moving block, a disc being sleeved and fixed on the vertical shaft, and a plurality of second locking grooves being evenly opened around the outer periphery of the disc; When the racks move away from each other, the first gear and connecting shaft will drive the cylinder to rotate, causing the moving block to move into the second slot under the limiting action of the first limiting block and the first limiting groove.

2. The rock fracture seepage test apparatus as described in claim 1, characterized in that, The top of the correction block is provided with an annular track groove, and the toothed ring is slidably engaged in the track groove.

3. The rock fracture seepage test apparatus as described in claim 1, characterized in that, The top of the correction block is provided with a second gear that meshes with the outer circumference of the gear ring. A pulley is coaxially fixed on the second gear. A vertical shaft is also rotatably provided on the correction block. A pulley is sleeved and fixed on the vertical shaft. The two pulleys are connected by a belt drive. A handle is fixed on the top of the vertical shaft.

4. The rock fracture seepage test apparatus as described in claim 1, characterized in that, The groove wall near the opening of the second slot has an outwardly flared slope, and one end of the second card block has an inclined surface that matches the slope.

5. The rock fracture seepage test apparatus as described in claim 4, characterized in that, The other end of the second locking block is inserted into the corresponding side wall of the moving block via a second spring.

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