Rock permeability measuring device

Abstract

The utility model relates to the technical field of permeability determination, in particular to a rock permeability determination device which comprises a plurality of liquid storage tanks, a pressure adjusting assembly, a placement cylinder, a first rotating part, an adjusting cavity and a second rotating part arranged in the adjusting cavity in an attached mode. The first rotating piece is configured to enable one of the liquid storage tanks to communicate with the placement barrel through rotation; the second rotating piece can move up and down in the adjusting cavity; the multiple containing barrels are arranged, hole channels corresponding to the containing barrels one to one are formed in the bottom of the adjusting cavity, and the containing barrels communicate with the liquid storage box through the adjusting cavity. A control through hole matched with the hole channel is formed in the second rotating part, and the second rotating part is configured to enable the adjusting cavity to be communicated with the multiple containing barrels at the same time or enable the adjusting cavity to be communicated with one containing barrel through rotation of the second rotating part. By means of the measuring device, the problems that an existing measuring device is low in testing efficiency and low in applicability can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of permeability measurement, in particular to a rock permeability measurement device. Background Art

[0002] Permeability refers to the ability of a rock to allow fluid to pass through it under a given pressure differential. It is a parameter that characterizes the ability of soil or rock to conduct liquids. Its magnitude is related to factors such as porosity, the geometry of the pores in the direction of liquid penetration, and the particle size and orientation, but is unrelated to the properties of the fluid moving through the medium. Measuring rock permeability is often necessary in geological research to understand the rock's condition.

[0003] However, existing rock permeability measurement devices have certain drawbacks. They can often only measure a single liquid per rock sample. Measuring the permeability of multiple liquids per rock sample often requires replacing the liquid storage tank, a cumbersome process that results in low measurement efficiency and limited applicability. Furthermore, existing devices often fail to maintain a constant water pressure on top of the rock, leading to errors and inaccurate measurement data.

[0004] In the prior art, a Chinese utility model patent document with publication number CN212432912U and publication date January 29, 2021 was proposed to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: A geological permeability measuring device includes: a sealed box and a limiting cylinder connected to each other, a rock sample to be tested is arranged in the limiting cylinder, and a liquid collecting cylinder is arranged at the bottom; a pressure sensor connected to the computer communication is arranged in the liquid collecting cylinder; a rotatable first hollow collecting plate is arranged in the sealed box, and several liquid storage tanks are arranged on the first hollow collecting plate, and the liquid storage tanks are connected to the first hollow collecting plate, and a first leakage port is arranged at the lower part of the first hollow collecting plate.

[0005] In actual use of the above technical solution, when one liquid is needed to measure the permeability of multiple rock samples, the rock samples need to be replaced, and it is impossible to use one liquid to measure the permeability of multiple rock samples at the same time. Summary of the Invention

[0006] In order to solve the above technical problems, the utility model proposes a rock permeability measuring device, which can effectively solve the problems of low testing efficiency and low applicability of existing measuring devices.

[0007] The utility model is realized by adopting the following technical solutions:

[0008] A rock permeability measuring device comprises a plurality of liquid storage tanks, a pressure regulating assembly, a placement tube and a first rotating member, wherein the first rotating member is configured to connect one of the liquid storage tanks with the placement tube by rotation; the device also comprises an adjusting chamber and a second rotating member fittedly arranged in the adjusting chamber, and the second rotating member can move up and down in the adjusting chamber; the number of the placement tubes is several, the bottom of the adjusting chamber is provided with a hole corresponding to the placement tubes one by one, and the placement tubes and the liquid storage tanks are connected through the adjusting chamber; the second rotating member is provided with a control through hole matching the hole, and the second rotating member is configured to enable the adjusting chamber to connect with a plurality of placement tubes at the same time, or to connect the adjusting chamber with one of the placement tubes by rotating the second rotating member.

[0009] The second rotating member includes a second rotating member body and a second control rod connected to the second rotating member body; the second rotating member body is fitted in the adjustment cavity, and the control through hole is provided in the second rotating member body.

[0010] A clamping block is provided on the upper surface of the second rotating member body. The clamping block includes a clamping block body and an elastic member arranged on the clamping block body. A clamping groove matching the clamping block is provided at the inner top of the regulating cavity.

[0011] The pressure regulating assembly includes a pressure regulating cylinder, a drainage bottle and several water outlet pipes; the water outlet pipes are arranged on the side wall of the pressure regulating cylinder and are spaced apart in the vertical direction; each water outlet pipe is provided with a switch valve, one end of the water outlet pipe is connected to the pressure regulating cylinder, and the other end is connected to the drainage bottle.

[0012] The first rotating member includes a first rotating member body and a first control rod connected to the first rotating member body. A communicating hole is provided on the first rotating member body.

[0013] A control cavity is further provided between the liquid storage tank and the pressure regulating cylinder. An opening is provided at the bottom of the control cavity. The first rotating member body is fittedly arranged in the control cavity.

[0014] The bottom of the liquid storage tank is connected to the side wall of the control cavity through a liquid outlet pipe; the communicating hole passes through the side of the first rotating member body and always overlaps with the horizontal projection of the opening.

[0015] The first control rod and the second control rod are coaxially arranged.

[0016] A transparent liquid level observation strip is provided on the side wall of the pressure regulating cylinder.

[0017] A filter screen is provided in the placement tube, and the filter screen is located at the lower side of the rock sample in the placement tube.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the utility model, by adjusting the setting of the chamber and the second rotating part, different types of liquids can be selected to control the testing of different rock samples, and one liquid can be used to test the permeability of multiple rock samples at the same time. It has strong applicability and does not need to frequently replace the liquid storage tank and rock samples, which reduces the labor intensity and greatly improves the efficiency of rock permeability measurement.

[0020] 2. In the present invention, the second rotating member has a simple structure and is easy to operate.

[0021] 3. Through the cooperation of the card slot and the card block, when performing permeability tests on multiple rock samples at the same time, the second rotating part can be lifted up and the second optional rotating part can be fixed to prevent the second rotating part from moving downward during the test and affecting the accuracy of the test results. It can also liberate labor during the test process.

[0022] 4. The structure of the pressure regulating assembly is simple. The pressure on the top of the rock sample is adjusted by adjusting the liquid level in the pressure regulating cylinder. This is more intuitive and easier to adjust. The liquid pressure on the top of the rock sample can be kept stable, which can improve the accuracy of the experiment and the accuracy of the data. In addition, the operation of the device is simple and convenient.

[0023] 5. A control chamber is provided between the liquid storage tank and the pressure regulating cylinder, which can improve the air tightness of the device and achieve better results when selecting the liquid in a certain liquid storage tank for permeability measurement.

[0024] 6. The bottom of the liquid storage tank is connected to the side wall of the control chamber through the liquid outlet pipe, which facilitates better control of the liquid outlet effect when rotating.

[0025] 7. The first control rod and the second control rod are coaxially arranged, making the overall structure of the measuring device more sophisticated.

[0026] 8. Through the transparent liquid level observation bar, the liquid level in the pressure regulating cylinder can be observed, so as to better judge the pressure at the top of the rock sample.

[0027] 9. The setting of the filter can prevent the rock sample particles from falling into the collection bottle located below the placement tube, avoiding experimental errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, wherein:

[0029] Figure 1 This is the structural diagram of the utility model;

[0030] Figure 2 This is an internal cross-sectional view of the utility model;

[0031] Figure 3 It is an enlarged view of the lower side of the internal sectional view of the present invention;

[0032] Figure 4 The structure of the first rotating member and the control chamber in the utility model Figure 1 ;

[0033] Figure 5 The structure of the first rotating member and the control chamber in the utility model Figure 2 ;

[0034] Figure 6 This is a structural diagram of the adjustment chamber and the second rotating member in the utility model;

[0035] Markings in the figure:

[0036] 1. Workbench, 2. Pressure regulating cylinder, 3. Sealing box, 4. Control chamber, 5. Liquid storage tank, 6. First rotating part body, 7. Placement cylinder, 8. Collecting bottle, 11. Support frame, 20. Liquid outlet pipe, 21. Water outlet pipe, 22. Drain bottle, 23. Switch valve, 24. Adjusting chamber, 25. Through hole, 26. Card slot, 27. Liquid level observation strip, 41. Opening, 42. Water inlet pipe, 51. Water inlet, 52. Liquid outlet channel, 61. First control rod, 62. Connecting hole, 63. Second control rod, 64. Second rotating part body, 65. Control through hole, 66. Card block, 71. Rock sample, 72. Filter. DETAILED DESCRIPTION

[0037] Example 1

[0038] As a basic embodiment of the present invention, the present invention includes a plurality of liquid storage tanks 5, a pressure regulating assembly, a placement cylinder 7, and a first rotating member, wherein the first rotating member is configured to connect one of the liquid storage tanks 5 with the placement cylinder 7 by rotation. The connection by rotation can be achieved by conventional technical means in the field, for example, the technical solution disclosed in publication number CN212432912U, wherein the first rotating member can be a rotatable first hollow collecting plate, and a plurality of liquid storage tanks 5 are arranged above the first hollow collecting plate, and a liquid outlet is provided at the bottom of the first hollow collecting plate. A liquid leakage port is provided at the bottom of the liquid storage tank 5, and correspondingly, a hole corresponding to the liquid leakage port is also provided on the upper surface of the first hollow collecting plate so that the liquid in the liquid storage tank 5 can flow into the first hollow collecting plate. When the first hollow collecting plate is rotated, the liquid in the liquid storage tank 5 flows into the first hollow collecting plate through the liquid leakage port, and then flows out through the liquid outlet provided at the bottom of the first hollow collecting plate.

[0039] There are several placement tubes 7, each with a collection bottle 8 beneath it. The placement tubes 7 are connected to the liquid storage tank 5 via a regulating chamber 24. Specifically, the inlet of the regulating chamber 24 is connected to the liquid outlet of the first hollow collecting plate. The bottom of the regulating chamber 24 is provided with holes corresponding to each placement tube 7. A second rotating member is fitted within the regulating chamber 24 and can move up and down within the regulating chamber 24. The structure of the second rotating member can be similar to that of the first rotating member, including a rotatable second hollow collecting plate. The upper portion of the second hollow collecting plate is provided with a liquid inlet that communicates with the regulating chamber 24, and the bottom portion is provided with an outlet that matches the hole. Rotation of the second hollow collecting plate connects the outlet of the second hollow collecting plate to one of the placement tubes 7, namely the target placement tube 7. Liquid flowing from the regulating chamber 24 into the second hollow collecting plate flows through the outlet of the second hollow collecting plate into the target placement tube 7, allowing permeability testing of the rock sample in the target placement tube 7 to be performed. After the liquid permeates the rock sample, it can flow into the collection bottle 8 below the placement tube 7.

[0040] When it is necessary to perform permeability tests on rock samples in several placement tubes 7 at the same time, it is only necessary to move the second hollow collecting plate upward so that the channels on the regulating chamber 24 are connected to the corresponding placement tubes 7 at the same time.

[0041] When performing the above-mentioned permeability test, the pressure in the regulating chamber 24 can be controlled and adjusted by the pressure regulating assembly.

[0042] Example 2

[0043] As a preferred embodiment of the present invention, the present invention includes a rock permeability measuring device, comprising a sealed box 3, a regulating chamber 24, and a pressure regulating assembly. The side walls of the sealed box 3 and the regulating chamber 24 are both provided with a connecting pipe, and the connecting pipe is connected to the pressure regulating assembly.

[0044] The sealed box 3 is provided with a first rotating part and a plurality of liquid storage tanks 5. The bottom of the sealed box 3 is provided with a liquid outlet connected to the liquid inlet of the regulating chamber 24. The bottom of each liquid storage tank 5 is flush and is respectively provided with a liquid leakage port. The first rotating part includes a first rotating part body 6 and a first control rod 61 connected to the first rotating part body 6. The first control rod 61 can extend upward from the sealed box 3. The upper surface of the first rotating part body 6 is in contact with the bottom of the liquid storage tank 5. The first rotating part body 6 is provided with a connecting hole 62 that matches the liquid leakage port of the liquid storage tank 5. The first control rod 61 drives the first rotating part body 6 to rotate so that the connecting hole 62 is only connected to the liquid leakage port of the target liquid storage tank 5, so that the liquid in the liquid storage tank 5 can pass through the connecting hole 62, the liquid outlet of the sealed box 3 and the liquid inlet of the regulating chamber 24 in sequence, and finally enter the regulating chamber 24.

[0045] There are several placing tubes 7, and the bottom of the regulating chamber 24 is provided with a hole corresponding to the placing tubes 7. The bottom of the placing tubes 7 is also connected to a collecting bottle 8. A second rotating member that can move up and down in the regulating chamber 24 is provided in the regulating chamber 24. The second rotating member includes a second rotating member body 64 and a second control rod 63 connected to the second rotating member body 64. The second control rod 63 extends upward from the regulating chamber 24, and its end is located outside the regulating chamber 24. More specifically, the first control rod 61 and the second control rod 63 are respectively located at the center of the sealing box 3 and the regulating chamber 24, and the axes of the first control rod 61 and the second control rod 63 are staggered, that is, they are not on the same vertical line.

[0046] The second rotating member body 64 is fitted within the adjustment chamber 24 and is provided with a control through-hole 65. When there is only one target placement tube 7, the second rotating member body 64 is driven by the second control rod 63 so that the lower surface of the second rotating member body 64 fits against the bottom of the adjustment chamber 24. The second control rod 63 rotates the second rotating member body 64 so that the control through-hole 65 communicates only with the corresponding channel of the target placement tube 7, allowing the liquid in the adjustment chamber 24 to sequentially pass through the control through-hole 65 and the channels on the adjustment chamber 24 and enter the target placement tube 7. When all placement tubes 7 are targeted, the second rotating member body 64 is driven upward by the second control rod 63 so that the liquid in the adjustment chamber 24 directly enters all placement tubes 7 through the corresponding channels.

[0047] Example 3

[0048] As another preferred embodiment of the present invention, the present invention includes a rock permeability measuring device, including a plurality of liquid storage tanks 5, a pressure regulating assembly, a regulating chamber 24, a first rotating member and a plurality of placement cylinders 7. The first rotating member includes a hollow collecting plate and a rotating handle located on the side of the hollow collecting plate. A plurality of liquid storage tanks 5 are arranged above the hollow collecting plate, and the bottom of the liquid storage tank 5 is in contact with the upper surface of the hollow collecting plate. A liquid leakage port is provided at the bottom of the liquid storage tank 5, and a hole corresponding to the liquid leakage port is provided on the upper surface of the hollow collecting plate. The hollow collecting plate is rotated by rotating the handle so that the hole on the hollow collecting plate is connected to the liquid leakage port of the target liquid storage tank 5, so that the liquid in the target liquid storage tank 5 can flow into the hollow collecting plate. A liquid outlet is also provided at the bottom of the hollow collecting plate.

[0049] The pressure regulating assembly includes a pressure regulating cylinder 2, a drainage bottle 22, and several outlet pipes 21. The outlet pipes 21 are located on the sidewall of the pressure regulating cylinder 2 and are spaced vertically apart. Each outlet pipe 21 is equipped with an on / off valve 23. One end of the outlet pipe 21 communicates with the pressure regulating cylinder 2 and the other end with the drainage bottle 22. The inlet of the pressure regulating cylinder 2 is connected to the liquid outlet at the bottom of the hollow manifold.

[0050] The regulating chamber 24 is disposed at the lower end of the pressure regulating tube 2 and communicates with the pressure regulating tube 2 via a plurality of through-holes 25. The bottom of the regulating chamber 24 is provided with a plurality of channels corresponding one to one with the placement tubes 7. A second rotating member is disposed within the regulating chamber 24. The second rotating member fits snugly within the regulating chamber 24 and is capable of moving up and down within the regulating chamber 24. The second rotating member is configured to simultaneously communicate with the regulating chamber 24 and with multiple placement tubes 7, or to rotate so that the regulating chamber 24 communicates with a single placement tube 7.

[0051] Example 4

[0052] As the best embodiment of the present invention, the present invention includes a rock permeability measuring device, Figure 1 and instructions attached Figure 2 , including a sealed box 3, a pressure regulating assembly, a regulating chamber 24 and four placement cylinders 7. A first rotating part, a control chamber 4 and four liquid storage tanks 5 are provided in the sealed box 3. The first rotating part includes a first rotating part body 6 and a first control rod 61 connected to the first rotating part body 6. The free end of the first control rod 61 is extended to the outside of the sealed box 3. The four liquid storage tanks 5 are equidistantly arranged, and the control chamber 4 is located at the center of the bottom end of the sealed box 3. A water inlet 51 is provided on the top of the liquid storage tank 5, and the bottom of the liquid storage tank 5 is connected to the side wall of the control chamber 4 through the liquid outlet pipe 20. Furthermore, a liquid outlet channel 52 matching the liquid outlet pipe 20 is provided on the side wall of the control chamber 4.

[0053] Refer to the instruction manual Figure 4 and instructions attached Figure 5 The control chamber 4 is a circular chamber, and the circular first rotating member body 6 is rotatably and tightly disposed within the control chamber 4. An opening 41 is defined at the bottom of the control chamber 4, and the diameter of the opening 41 is smaller than that of the first rotating member body 6. The first rotating member body 6 is provided with a connecting hole 62, which passes through the side of the first rotating member body 6, and the horizontal projection of the connecting hole 62 partially overlaps with the opening 41.

[0054] The pressure regulating assembly includes a pressure regulating cylinder 2, a drainage bottle 22, and several outlet pipes 21. The bottom of the control chamber 4 is connected to the interior of the pressure regulating cylinder 2 via a water inlet pipe 42. Four outlet pipes 21 are provided, located on the sidewalls of the pressure regulating cylinder 2 and spaced vertically apart. Each outlet pipe 21 is equipped with an on-off valve 23. One end of the outlet pipe 21 is connected to the pressure regulating cylinder 2, and the other end is connected to the drainage bottle 22. Furthermore, a transparent liquid level observation strip 27 is provided on the sidewall of the pressure regulating cylinder 2.

[0055] Refer to the instruction manual Figure 3 and instructions attached Figure 6 The regulating chamber 24 is arranged at the lower end of the interior of the pressure regulating tube 2. The regulating chamber 24 can be connected to the pressure regulating tube 2 through a plurality of through holes 25. The through holes 25 can be arranged on the side wall of the regulating chamber 24. The bottom of the regulating chamber 24 is also provided with four channels corresponding to the placement tubes 7 one by one, so that the regulating chamber 24 is connected to the placement tube 7. A second rotating member that can move up and down in the regulating chamber 24 is provided in the regulating chamber 24. The second rotating member is configured to enable the regulating chamber 24 to be connected to a plurality of placement tubes 7 at the same time, or to enable the regulating chamber 24 to be connected to one of the placement tubes 7 by rotation. Specifically, the second rotating member includes a second rotating member body 64 and a second control rod 63 connected to the second rotating member body 64. The second rotating member body 64 is fitted in the regulating chamber 24, and a control through hole 65 is provided on the second rotating member body 64. By rotating the second rotating member body 64 by the second control rod 63, the control through hole 65 can be made to correspond to one of the channels at the bottom of the regulating chamber 24.

[0056] Furthermore, the second control rod 63 passes through the first rotating member body 6 and the first control rod 61 , the top end of the second control rod 63 is located outside the sealing box 3 , and the first control rod 61 and the second control rod 63 are coaxially arranged.

[0057] Several blocks 66 are connected to the top of the second control member. The blocks 66 include a block body and an elastic member disposed on the block body. The inner top of the adjustment chamber 24 is provided with several slots 26 that match and correspond to the blocks 66. More specifically, the elastic member can be an elastic ring. By moving the second control member up and down and applying force, the blocks 66 can be snapped into the slots 26, so that the second rotating member body 64 can be located at the top of the adjustment chamber 24 and maintain this state. When it is necessary to cancel this state, the blocks 66 can also be pulled out of the slots 26 by applying force.

[0058] The four placement cylinders 7 can be detachably connected to the bottom of the pressure regulating cylinder 2 via threads. The four placement cylinders 7 are connected to the regulating chamber 24 via four holes at the bottom of the regulating chamber 24. A rock sample 71 is placed at the center of the placement cylinder 7. The bottom of the placement cylinder 7 is connected to a filter screen 72, which is located below the rock sample 71 in the placement cylinder 7. The bottom of the placement cylinder 7 is detachably connected to a collection bottle 8 via threads.

[0059] Furthermore, in order to achieve better fixation, the device further comprises a workbench 1. The top of the workbench 1 is connected to a pressure regulating cylinder 2 via three L-shaped support frames 11. The drainage bottle 22 is arranged on the workbench 1.

[0060] In the initial state, the connecting hole 62 on the first rotating part body 6 is not facing any liquid outlet channel 52. At this time, the first rotating part body 6 closes all four liquid outlet channels 52, and the device is in a closed state. First, remove the placement tube 7, place the polished rock sample 71 into the placement tube 7, and then reinstall the placement tube 7 to determine the type of liquid and pressure required for the experiment. Open the corresponding switch valve 23 on the outlet pipe 21 according to the pressure. For example, if a higher pressure is required, open the switch valve 23 of the topmost outlet pipe 21, and if a lower pressure is required, open the switch valve 23 of the bottommost outlet pipe 21, and then rotate the first control rod 61 so that the connecting hole 62 faces the corresponding liquid outlet channel 52. The liquid in the liquid storage tank 5 can flow out from the opening 41 of the control chamber 4 and enter the pressure regulating tube 2 through the water inlet pipe 42. Then, the second control lever 63 is rotated to select the rock sample 71 to be measured. That is, the second control lever 63 is rotated to rotate the second rotating member body 64. The control hole 65 on the second rotating member body 64 corresponds to a channel at the bottom of the adjustment chamber 24 corresponding to the target placement tube 7, thereby allowing liquid to flow into the target placement tube 7. If four rocks need to be tested simultaneously, the second control lever 63 is pulled upward so that the block 66 can be locked into the slot 26. The second rotating member body 64 is located at the top of the adjustment chamber 24, and the liquid can enter four different placement tubes 7 simultaneously through the four channels. After the first rotating member and the second rotating member are opened, the liquid can flow into the placement cylinder 77. Since the efficiency of the liquid penetrating through the rock is slow, the liquid level in the pressure regulating cylinder 2 will continue to increase until it reaches the outlet pipe 21 where the switch valve 23 is in the open state. The excess liquid will flow into the drainage bottle 22, so that the liquid level remains stable and the pressure on the top of the rock sample 71 remains stable. After waiting for a while, rotate the first control rod 61 to close the sealing box 3, then remove the collecting bottle 8 to weigh the amount of liquid that has passed through the rock sample 71, and finally calculate the permeability of the rock sample 71.

[0061] To sum up, after reading the utility model document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the utility model without creative mental labor, which all fall within the scope of protection of the utility model.

Claims

1. A rock permeability measuring device, comprising a plurality of liquid storage tanks (5), a pressure regulating assembly, a placement cylinder (7), and a first rotating member, wherein the first rotating member is configured to connect one of the liquid storage tanks (5) with the placement cylinder (7) by rotating; characterized in that: The invention also includes an adjusting chamber (24) and a second rotating member fitted in the adjusting chamber (24), and the second rotating member can move up and down in the adjusting chamber (24); the number of the placing cylinders (7) is several, and the bottom of the adjusting chamber (24) is provided with a hole corresponding to the placing cylinders (7), and the placing cylinders (7) and the liquid storage tank (5) are connected through the adjusting chamber (24); the second rotating member is provided with a control through hole (65) matching the hole, and the second rotating member is configured so that the adjusting chamber (24) can be connected with several placing cylinders (7) at the same time, or the adjusting chamber (24) is connected with one of the placing cylinders (7) by rotating the second rotating member.

2. A rock permeability measuring device according to claim 1, characterized in that: The second rotating member comprises a second rotating member body (64) and a second control rod (63) connected to the second rotating member body (64); the second rotating member body (64) is arranged in a close fit within the adjustment cavity (24), and the control through hole (65) is arranged on the second rotating member body (64).

3. A rock permeability measuring device according to claim 2, characterized in that: A clamping block (66) is provided on the upper surface of the second rotating member body (64), and the clamping block (66) comprises a clamping block body and an elastic member arranged on the clamping block body. The inner top end of the regulating cavity (24) is provided with a clamping groove (26) matching the clamping block (66).

4. A rock permeability measuring device according to claim 2 or 3, characterized in that: The pressure regulating assembly comprises a pressure regulating cylinder (2), a drainage bottle (22) and a plurality of water outlet pipes (21); the water outlet pipes (21) are arranged on the side wall of the pressure regulating cylinder (2) and are arranged at intervals in the vertical direction; each water outlet pipe (21) is provided with a switch valve (23), one end of the water outlet pipe (21) is connected to the pressure regulating cylinder (2), and the other end is connected to the drainage bottle (22).

5. A rock permeability measuring device according to claim 4, characterized in that: The first rotating member comprises a first rotating member body (6) and a first control rod (61) connected to the first rotating member body (6); a communicating hole (62) is provided on the first rotating member body (6).

6. A rock permeability measuring device according to claim 5, characterized in that: A control chamber (4) is further provided between the liquid storage tank (5) and the pressure regulating cylinder (2). An opening (41) is provided at the bottom of the control chamber (4). The first rotating member body (6) is fitted in the control chamber (4).

7. A rock permeability measuring device according to claim 6, characterized in that: The bottom of the liquid storage tank (5) is connected to the side wall of the control chamber (4) through the liquid outlet pipe (20); the communication hole (62) passes through the side of the first rotating member body (6) and always overlaps with the horizontal projection of the opening (41).

8. The rock permeability measuring device according to claim 5, characterized in that: The first control rod (61) and the second control rod (63) are coaxially arranged.

9. The rock permeability measuring device according to claim 4, characterized in that: A transparent liquid level observation strip (27) is provided on the side wall of the pressure regulating cylinder (2).

10. The rock permeability measuring device according to claim 4, characterized in that: A filter screen (72) is provided in the placement cylinder (7), and the filter screen (72) is located on the lower side of the rock sample (71) in the placement cylinder (7).

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