A rock stress dissolution test device and equipment

Abstract

The present application discloses a rock stress dissolution test device and its equipment, which relate to the field of rock mechanics test technology. The rock stress dissolution test device comprises: a test tank; the test tank is also provided with a circular opening connected to the test chamber; a ring member, which is arranged at the circular opening of the test tank; a plurality of stirring rods; each stirring rod is arranged at the ring member; when in use, each stirring rod is located in the test chamber of the test tank; a driving structure, which is used to drive the ring member to rotate around the axis of the ring member. The present application designs the ring member and the stirring rod structure so that the ring member and each stirring rod will not interfere with the test block or the pressure head, and when the ring member rotates, it can drive each stirring rod to rotate as well, and the rotating stirring rod can make the concentration of the chemical solution in various places inside the test tank tend to be consistent.

Description

Technical Field

[0001] The present application relates to the technical field of rock mechanics testing, and in particular to a rock stress corrosion testing device and equipment thereof. Background Art

[0002] Rock mechanics is a science that studies the mechanical properties of rocks and related phenomena. It has a wide range of applications, involving many fields such as economic infrastructure, resource development, environmental protection, disaster reduction and prevention. Human understanding of the mechanical properties of rocks began with experiments, and the formation and development of rock mechanics theory is closely linked to experimental methods. The mechanical properties of rocks include strength, deformation, dynamic characteristics and permeability. Since these properties are affected by the physical and chemical environment in which the rocks are located, the methods for studying the mechanical properties of rocks are mainly field and indoor tests. Common rock mechanics tests include triaxial compression tests, shear tests and uniaxial compression tests.

[0003] It should be clear that the influence of chemical erosion on the pore structure of rock is the premise and basis for the long-term stability evaluation of rock engineering. At present, the research on rock stress dissolution has received extensive attention and in-depth development. Although the test device of the prior art can simulate the mechanical behavior of rock under different conditions, such as uniaxial compression, triaxial compression, uniaxial tension and direct shear, the test device of the prior art cannot accurately simulate the chemical erosion environment (such as acidic environment or alkaline environment) of the rock using chemical solution under certain mechanical conditions. The main reason is as follows: during the chemical erosion effect test, the rock can react chemically with the chemical solution, and the speed of the chemical reaction mainly depends on the contact area between the rock and the chemical solution. It is easy to understand that if cracking occurs during the rock test, that is, the contact area between the cracked rock and the chemical solution becomes larger, the concentration of the chemical solution in various places (such as the cracked rock and the uncracked rock) in the narrow space (such as the inside of the test tank below) must be inconsistent. If the concentration of the chemical solution in various places in the narrow space is inconsistent, it is difficult to accurately simulate the chemical erosion environment in which the rock is located. Summary of the invention

[0004] The purpose of the present application is to provide a rock stress dissolution test device and equipment thereof, so as to solve the technical problem that the concentration of chemical solution in various places inside the test tank is difficult to maintain consistency in the rock chemical erosion effect test.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, the present application proposes a technical solution of a rock stress corrosion test device, which is applied to a pressure test device, the pressure test device includes a pressure head, and the rock stress corrosion test device includes:

[0007] A test tank; a test cavity capable of accommodating a test block and a chemical solution is formed inside the test tank; the test tank is also provided with a circular opening communicating with the test cavity;

[0008] An annular member is arranged at the circular opening of the test tank; the axis of the annular member coincides with the axis of the circular opening; the outer diameter of the annular member matches the inner diameter of the circular opening, and the inner diameter of the annular member matches the outer diameter of the pressure head;

[0009] A plurality of stirring rods; each stirring rod is disposed on the annular member; when in use, each stirring rod is located in the test chamber of the test tank;

[0010] The driving structure is used to drive the annular member to rotate around the axis of the annular member.

[0011] As a specific solution in the technical solution of the present application, the annular member includes a gear ring; the driving structure includes:

[0012] Rotating shaft;

[0013] A driving gear is disposed at one end of the rotating shaft, and the driving gear is meshed with the gear ring;

[0014] A driving assembly is arranged on the test tank; the driving assembly is used to drive the rotating shaft to rotate.

[0015] As a specific solution in the technical solution of the present application, the driving component includes a servo motor, or the driving component includes:

[0016] A bracket is arranged on the test tank; the rotating shaft is arranged on the bracket and is rotatably connected with the bracket;

[0017] A driven wheel is arranged on the rotating shaft; the driven wheel and the axis of the rotating shaft coincide with each other;

[0018] A driving motor is arranged on the bracket;

[0019] A driving wheel, arranged at the output end of the driving motor;

[0020] A transmission belt is arranged between the driven wheel and the driving wheel so that the driven wheel and the driving wheel form a transmission connection.

[0021] As a specific solution in the technical solution of the present application, the rock stress dissolution testing device also includes an adjusting component, which is at least used to adjust the rotation speed of the driven wheel based on the pressing depth of the pressure head, so that the pressing depth of the pressure head is positively correlated with the rotation speed of the driven wheel.

[0022] As a specific solution in the technical solution of the present application, the driven wheel includes a plurality of sliding blocks; each sliding block is evenly distributed around the axis of the rotating shaft; each sliding block forms a sliding connection with the rotating shaft along the radial direction of the rotating shaft; each sliding block is provided with a slot at one end away from the rotating shaft; the slot is adapted to the transmission belt; the adjustment component includes:

[0023] A sliding ring, movably sleeved on the rotating shaft; and the sliding ring can form a sliding connection with the rotating shaft along a first direction; the first direction is parallel to the axial direction of the rotating shaft;

[0024] A first connecting rod corresponding to each sliding block; one end of the first connecting rod is hinged to the sliding ring; the other end of the first connecting rod is hinged to the corresponding sliding block;

[0025] A bearing, disposed outside the sliding ring;

[0026] A second connecting rod has one end connected to the bearing and the other end used to be connected to the pressure head; when the pressure head is pressed down, the second connecting rod causes the sliding ring to move away from each sliding block along the first direction.

[0027] As a specific solution in the technical solution of the present application, the transmission belt is elastic; or the driving assembly further includes:

[0028] A sliding seat is arranged on the bracket; and the sliding seat and the bracket form a sliding connection along a second direction; the second direction is parallel to the radial direction of the rotating shaft; the driving motor is arranged on the sliding seat;

[0029] A fixed block, disposed on the bracket; the fixed block is located between the rotating shaft and the sliding seat;

[0030] An elastic member is arranged between the fixed block and the sliding seat; the elastic member stores elastic potential energy, and the elastic potential energy has a tendency to make the sliding seat move away from the rotating shaft along the second direction.

[0031] As a specific solution in the technical solution of the present application, the test tank is also provided with an observation window, and the observation window is made of transparent material.

[0032] As a specific solution in the technical solution of this application, the rock stress dissolution test device also includes:

[0033] A liquid inlet pipe, disposed in the test tank and connected to the test chamber;

[0034] The liquid outlet pipe is arranged on the test tank and is communicated with the test cavity.

[0035] As a specific solution in the technical solution of the present application, the stirring rod is cylindrical, or the stirring rod is in the shape of a spiral sheet.

[0036] In a second aspect, the present application proposes a technical solution for a rock stress corrosion test device, which includes a pressure head and a rock stress corrosion test device as described in any one of the first aspects.

[0037] Compared with the prior art, the beneficial effects of this application are:

[0038] The present application adopts the design of the ring and the stirring rod structure, so that the ring and each stirring rod will not interfere with the test block or the pressure head, and when the ring rotates, it can drive each stirring rod to rotate as well, and the rotating stirring rod can make the concentration of the chemical solution in each place inside the test tank tend to be consistent. Compared with the rock stress corrosion test device without stirring function in the prior art, the present application can more accurately simulate the chemical corrosion environment of the rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional schematic diagram of a rock stress corrosion test device proposed in an embodiment of the present application;

[0040] Figure 2 A cross-sectional schematic diagram of a rock stress corrosion test device proposed in an embodiment of the present application (excluding the driving structure);

[0041] Figure 3 A three-dimensional schematic diagram of a ring member and a stirring rod combination proposed in an embodiment of the present application;

[0042] Figure 4 A three-dimensional schematic diagram of another rock stress corrosion test device proposed in an embodiment of the present application;

[0043] Figure 5 A three-dimensional schematic diagram of a driving structure proposed in an embodiment of the present application;

[0044] Figure 6 A three-dimensional schematic diagram of an adjustment component proposed in an embodiment of the present application;

[0045] Figure 7 It is a partial three-dimensional schematic diagram of a driving structure proposed in an embodiment of the present application.

[0046] In the figure: 1. test tank; 11. liquid inlet pipe; 12. liquid outlet pipe; 13. observation window; 2. pressure head; 3. ring member; 4. stirring rod; 5. driving gear; 6. rotating shaft; 7. driving assembly; 71. bracket; 711. sliding groove; 72. driven wheel; 721. sliding block; 722. sliding ring; 723. first connecting rod; 724. bearing; 725. second connecting rod; 73. driving wheel; 74. driving motor; 75. transmission belt; 76. fixing block; 77. sliding seat; 78. elastic member; 8. test block. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] It should be noted that, in the description of the present application, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0049] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0050] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0051] In order to solve the technical problem that it is difficult to maintain consistent concentrations of chemical solutions at various locations inside a test tank in a test of the chemical erosion effects of rocks proposed in the background technology, the present application proposes an embodiment of a rock stress dissolution test device, which is applied to a pressure test device, and the pressure test device includes a pressure head 2. It should be clear that in the embodiments of the present application, the pressure test device can be any device capable of performing a rock stress test, for example: a test device capable of performing uniaxial compression, triaxial compression or shearing on rocks proposed in the background technology. In other words, in the embodiments of the present application, there is no restriction on the pressure test device, and it only needs to have a pressure head 2. Since the test equipment for uniaxial compression, triaxial compression or shearing belongs to mature existing technologies, the embodiments of the present application do not describe these pressure test equipment in detail.

[0052] In this embodiment, the rock stress corrosion test device includes a test tank 1, a ring member 3, a driving structure and a plurality of stirring rods 4. Figure 1 and Figure 2 As shown, a test chamber capable of accommodating a test block 8 and a chemical solution is formed inside the test tank 1, and the test tank 1 is also provided with a circular opening connected to the test chamber. The ring member 3 is provided at the circular opening of the test tank 1, and the axis of the ring member 3 coincides with the axis of the circular opening. The outer diameter of the ring member 3 is adapted to the inner diameter of the circular opening, and the inner diameter of the ring member 3 is adapted to the outer diameter of the pressure head 2. Each stirring rod 4 is provided at the ring member 3. When in use, each stirring rod 4 is located in the test chamber of the test tank 1. The driving structure is used to drive the ring member 3 to rotate around the axis of the ring member 3.

[0053] It should be noted that due to the presence of the test block 8 and the pressure head 2 during the test, if a stirring structure is provided in the test tank 1, the stirring structure is likely to interfere with the test block 8 and the pressure head 2 during the test, thereby affecting the test results, or damaging the stirring structure, the pressure head 2 or the test block 8, etc. In other words, it is difficult to provide a stirring structure in the test tank 1 in the prior art to stir the chemical solution, that is, it is difficult to ensure that the concentration of the chemical solution at various locations inside the test tank 1 is consistent during the test. The present application provides an annular member 3 and a plurality of stirring rods 4, so that the annular member 3 and each stirring rod 4 will not interfere with the test block 8 or the pressure head 2, and when the annular member 3 rotates, it can drive each stirring rod 4 to rotate as well, and the rotating stirring rod 4 can make the concentration of the chemical solution at various locations inside the test tank 1 tend to be consistent.

[0054] In this embodiment, in order to ensure that the disturbance generated by each stirring rod 4 has little effect on the test result, the rotation speed of the ring member 3 can be as small as possible, provided that the concentration of the chemical solution at various locations inside the test tank 1 can be consistent. For example, the rotation speed of the ring member 3 can be 1 rpm, or 3 rpm, etc.

[0055] It should be clear that in this embodiment, if Figure 2 As shown, the annular member 3 is arranged at the circular opening of the test tank 1 when in use. The outer diameter of the annular member 3 is adapted to the inner diameter of the circular opening, which means that the chemical solution inside the test chamber will not leak from the connection between the annular member 3 and the circular opening (hereinafter referred to as the first connection) when in use. For example, the outer diameter of the annular member 3 can be equal to the inner diameter of the circular opening, or the annular member 3 and the circular opening form an interference fit, or a sealing ring can be arranged between the annular member 3 and the circular opening. In this embodiment, as Figure 2 As shown, when in use, the pressure head 2 needs to be inserted into the ring member 3. The inner diameter of the ring member 3 is adapted to the outer diameter of the pressure head 2, which means that the chemical solution inside the test chamber will not leak from the connection between the ring member 3 and the pressure head 2 (hereinafter referred to as the second connection) when in use. For example, the inner diameter of the ring member 3 and the outer diameter of the pressure head 2 can be equal, or a sealing ring is provided between the ring member 3 and the pressure head 2. It should be clear that providing a sealing ring between two parts to enhance the sealing performance between the two parts is a mature technology and will not be described in detail here.

[0056] It should be noted that, in the present embodiment, even if a small amount of chemical solution leaks from the first connection or the second connection during the test of the rock stress dissolution test device (for example, the leakage of the chemical solution is one percent or one thousandth of the volume of the test tank 1), as long as the leakage does not affect the safety of the test (for example, the chemical solution inside the test tank 1 will not leak out in the form of splashing) and does not seriously affect the test results, it can be considered that the outer diameter of the ring 3 is compatible with the inner diameter of the circular opening, and the inner diameter of the ring 3 is also compatible with the outer diameter of the pressure head 2.

[0057] In the embodiment of the present application, there is no restriction on the shape and structure of the test tank 1, and the test tank 1 can be designed into various shapes or structures as needed. For example, in order to enable the test tank 1 to perform a uniaxial compression test, the test tank 1 can be designed into a cylindrical tank or a cylindrical tank. Figure 1 The square cylindrical tank is shown; in order to enable the test tank 1 to perform a shear test, the test tank 1 can be designed to be a three-way pipe-shaped tank (not shown in the figure). This will not be listed one by one, and the embodiments of the present application will be described in detail in the following using the square cylindrical tank-shaped test tank.

[0058] It should be noted that since the test tank 1 of the embodiment of the present application is mainly used for rock stress dissolution test, in order to improve the service life of the test tank 1, the test tank 1 itself can have a certain corrosion resistance. In other words, the test tank 1 of the embodiment of the present application can be made of a material resistant to chemical corrosion. For example, the test tank can be made of materials such as ceramics, plastics or stainless steel. It is easy to understand that in the following, in order to improve the service life of some parts that are in direct contact with chemical solutions (for example: pressure head 2, etc.), these parts can also be made of the same corrosion-resistant material as the test tank 1, and they will not be described one by one later.

[0059] In order to enable the operator to intuitively observe the test phenomenon occurring in the test tank 1. In one embodiment of the present application, Figure 1 and Figure 4 As shown, the test tank 1 may further include an observation window 13 disposed on the test tank 1. Specifically, the observation window 13 is a transparent structure, which may be made of materials such as polymethyl methacrylate or glass.

[0060] In the embodiment of the present application, there is no limitation on the shape and structure of the stirring rod 4, as long as the stirring rod 4 can stir the chemical solution in the test chamber. Figure 2 As shown, it is cylindrical, but it can also be Figure 3 Shown is in the form of a spiral sheet.

[0061] In some test application scenarios, it is necessary to keep the concentration of the chemical solution in the test chamber stable. As can be seen from the background technology, during the test, the test block 8 will react chemically with the chemical solution. It is easy to understand that if the test block 8 reacts chemically with the chemical solution, the concentration of the chemical solution will definitely change, that is, the concentration of the chemical solution is difficult to maintain stable. In order to enable the rock stress dissolution test device in the embodiment of the present application to meet the application requirements of maintaining a stable concentration of the chemical solution in the test chamber, in one embodiment of the present application, the rock stress dissolution test device may also include a liquid inlet pipe 11 and a liquid outlet pipe 12. Among them, if Figure 1 , Figure 2 and Figure 4 As shown, the liquid inlet pipe 11 is arranged on the test tank 1 and communicates with the test chamber. The liquid outlet pipe 12 is also arranged on the test tank 1 and communicates with the test chamber.

[0062] When in use, the chemical solution with a concentration that meets the test requirements in the outside can be injected into the test chamber through the liquid inlet pipe 11, and the chemical solution that reacts in the test chamber (that is, the chemical solution whose pH does not meet the test requirements) is discharged from the test chamber through the liquid outlet pipe 12. In other words, the rock stress dissolution test device proposed in this embodiment can keep the concentration of the chemical solution in the test chamber stable by replacement.

[0063] In the embodiment of the present application, there is no restriction on the shape and structure of the ring member 3, as long as it can be easily driven to rotate by the driving assembly 7. For example, the ring member 3 can be a sprocket ring or a Figure 3 In the prior art, there are many driving structures for driving the sprocket ring or the gear ring to rotate, which will not be listed one by one in the embodiments of the present application.

[0064] In one embodiment of the present application, the annular member 3 may be a gear ring. The driving structure may include a rotating shaft 6, a driving gear 5 and a driving assembly 7. Figure 1 and Figure 4 As shown, the driving gear 5 is disposed at one end of the rotating shaft 6, and the driving gear 5 is meshed with the gear ring (ie, the ring member 3). The driving assembly 7 is disposed on the test tank 1, and is used to drive the rotating shaft 6 to rotate.

[0065] When in use, if the driving assembly 7 drives the rotating shaft 6 to rotate, the rotating rotating shaft 6 can drive the driving gear 5 to rotate. If the driving gear 5 rotates, since the driving gear 5 is meshed with the gear ring (i.e., the annular member 3), the rotating driving gear 5 can drive the annular member 3 to rotate.

[0066] In the embodiment of the present application, the driving component 7 can be any component or part that can drive the rotating shaft 6 to rotate. For example, the driving component 7 can be Figure 1 Alternatively, the drive assembly 7 may be a servo motor as shown. Figure 4 and Figure 5 As shown, it includes a bracket 71, a driven wheel 72, a driving wheel 73, a driving motor 74 and a transmission belt 75. Among them, the bracket 71 is arranged on the test tank 1, the rotating shaft 6 is arranged on the bracket 71, and the rotating shaft 6 and the bracket 71 are rotatably connected. The driven wheel 72 is arranged on the rotating shaft 6, and the axis of the driven wheel 72 coincides with the axis of the rotating shaft 6. The driving motor 74 is arranged on the bracket 71, and the driving wheel 73 is arranged at the output end of the driving motor 74. The transmission belt 75 is arranged between the driven wheel 72 and the driving wheel 73, so that the driven wheel 72 and the driving wheel 73 are in transmission connection.

[0067] When in use, the driving motor 74 drives the driving wheel 73 to rotate. Since the driven wheel 72 and the driving wheel 73 are connected to each other through the transmission belt 75, the rotating driving wheel 73 can drive the driven wheel 72 to rotate through the transmission belt 75. Since the driven wheel 72 is arranged on the rotating shaft 6, the rotating driven wheel 72 can directly drive the rotating shaft 6 to rotate.

[0068] It should be clear that before using the rock stress corrosion test device proposed in the embodiment of the present application to test the rock, Figure 2As shown, the test block 8 needs to be placed inside the test chamber for fixing, and a chemical solution (not shown in the figure) needs to be filled into the test chamber to simulate the chemical erosion environment of the rock. During the test, the pressure head 2 needs to be slowly pressed into the test chamber so that the test block 8 is subjected to a certain pressure. In the application scenario where the test chamber is filled with chemical solution, since the volume corresponding to the test chamber and the volume of the test block 8 are theoretically stable (the part of the test block 8 undergoing chemical reaction is negligible), the volume of the chemical solution in the test chamber is equal to the volume of the test chamber minus the volume of the test block 8, and minus the volume of the pressure head 2 in the test chamber. It is easy to understand that since the pressure head 2 is slowly pressed into the test chamber, that is, during the entire test process, as the pressure head 2 is pressed into the depth, the volume of the chemical solution in the test chamber gradually decreases, that is, the ratio of the volume of the chemical solution to the volume of the test block 8 gradually decreases. It is easy to understand that if the volume of the chemical solution in the test chamber is smaller (that is, the less chemical solution), the concentration difference of the chemical solution in each place in the test chamber will be greater after the test block 8 reacts with the chemical solution. In addition, the increased penetration depth of the pressure head 2 will also cause the test block 8 to crack more severely, and the severely cracked test block 8 will also cause the chemical reaction rate between the test block 8 and the chemical solution to increase. If the chemical reaction rate increases, the concentration difference of the chemical solution at various locations in the test chamber will further increase.

[0069] In order to ensure that the concentration of the chemical solution in each location in the test chamber of the rock stress dissolution test device can be consistent during the entire test process, in one embodiment of the present application, the rock stress dissolution test device may also include an adjustment component, which is at least used to adjust the rotation speed of the driven wheel 72 based on the pressing depth of the pressure head 2, so that the pressing depth of the pressure head 2 is positively correlated with the rotation speed of the driven wheel 72.

[0070] It is easy to understand that during the entire test process, the pressing depth of the pressure head 2 is positively correlated with the rotation speed of the driven wheel 72, which means that if the pressing depth of the pressure head 2 is greater, the rotation speed of the driven wheel 72 is increased, that is, the rotation speed of the ring member 3 is increased. It is easy to understand that the faster the rotation speed of the ring member 3 is, the more the concentration of the chemical solution in each place in the test chamber can be made to be consistent.

[0071] In the embodiment of the present application, the adjustment component may be any part or device that can adjust the rotation speed of the driven wheel 72 based on the pressing depth of the pressing head 2. For example, the adjustment component may be as shown in at least the following two embodiments.

[0072] Embodiment 1 of the adjustment component

[0073] In this embodiment, the adjustment component includes a frequency converter, a controller, and a displacement sensor. The frequency converter is used to adjust the frequency of the working power supply of the drive motor 74, thereby adjusting the speed of the drive motor 74; the displacement sensor is used to measure the pressing depth of the pressure head 2; the controller is used to convey the instruction of adjusting the working power supply frequency of the drive motor 74 to the frequency converter based on the pressing depth of the pressure head 2 measured by the displacement sensor. It should be clear that the frequency converter, displacement sensor and controller are all mature existing technologies and will not be described in detail here. Instructions

[0074] Embodiment 2 of the adjustment component

[0075] It should be clear that in the automatic control system, with the increase of electronic equipment (such as inverters, controllers, displacement sensors, etc.), the structure and function of the automatic control system become more complex. This leads to more interactions and dependencies between the various parts of the automatic control system, making the operation and maintenance of the entire automatic control system more difficult. And each electronic device itself may have potential failure points. When the number of electronic equipment in the automatic control system increases, the probability of failure will also increase accordingly. Moreover, the failure of one electronic device may affect the normal operation of other electronic devices, and then affect the stability of the entire automatic control system.

[0076] In order to improve the stability of the automatic control of the rock stress corrosion test device, in this embodiment, Figure 5 and Figure 6 As shown, the driven wheel 72 includes a plurality of sliding blocks 721, and each sliding block 721 is evenly distributed around the axis of the rotating shaft 6. Each sliding block 721 forms a sliding connection with the rotating shaft 6 along the radial direction of the rotating shaft 6. A card slot is provided at one end of each sliding block 721 away from the rotating shaft 6, and the card slot is adapted to the transmission belt 75. In this embodiment, the card slot is adapted to the transmission belt 75, which means that the transmission belt 75 can form a large friction force with the card slot when it is inserted into the card slot, and when the transmission belt 75 moves, the friction force can cause the corresponding sliding block 721 to rotate around the axis of the rotating shaft 6.

[0077] In this embodiment, the adjustment assembly includes a sliding ring 722, a bearing 724, a second connecting rod 725, and a first connecting rod 723 corresponding to the sliding block 721. Figure 6As shown, the sliding ring 722 is movably sleeved on the rotating shaft 6, and the sliding ring 722 can form a sliding connection with the rotating shaft 6 along the first direction, and the first direction is parallel to the axial direction of the rotating shaft 6. One end of each first connecting rod 723 is hinged to the sliding ring 722, and the other end of each first connecting rod 723 is hinged to the corresponding sliding block 721. The bearing 724 is arranged outside the sliding ring 722. One end of the second connecting rod 725 is connected to the bearing 724, and the other end of the second connecting rod 725 is used to connect with the pressure head 2. When the pressure head 2 is pressed down, the second connecting rod 725 makes the sliding ring 722 away from each sliding block 721 along the first direction.

[0078] In the embodiment of the present application, the second connecting rod 725 can be connected to the pressure head 2 in any reasonable manner, for example, welding or screwing.

[0079] When in use, if the pressing depth of the pressure head 2 increases, then under the action of the second connecting rod 725, the sliding ring 722 moves in the first direction away from each sliding block 721. If the sliding ring 722 moves in the first direction away from each sliding block 721, then under the action of the first connecting rod 723, the corresponding sliding block 721 will move in the radial direction of the rotating shaft 6 toward the rotating shaft 6. As can be seen from the foregoing, in this embodiment, the driven wheel 72 includes a plurality of sliding blocks 721. In other words, the outer diameter of the driven wheel 72 is equal to the outer diameter of the annular part (hereinafter referred to as the annular part) formed by each sliding block 721. If each sliding block 721 moves in the radial direction of the rotating shaft 6 toward the rotating shaft 6, the outer diameter of the annular part decreases. It should be noted that in this embodiment, the linear velocity of the driving wheel 73 and the annular part (i.e., the driven wheel 72) is equal. When the linear velocity of the driving wheel 73 remains unchanged, if the outer diameter of the annular part decreases, the angular velocity of the annular part must increase. If the angular velocity of the annular part increases, the rotation speeds of the rotating shaft 6, the driving gear 5 and the annular part 3 increase synchronously. In this embodiment, the rotation speed of the annular part 3 increases if the pressing depth of the pressure head increases through a mechanical structure. Compared with realizing this function through multiple electronic devices, this embodiment can improve the stability of the automatic control of the rock stress dissolution test device. So far, the second embodiment of the adjustment component is introduced.

[0080] It should be understood that in the embodiment of the present application, the transmission belt 75 can have good elasticity. That is, if the outer diameter of the driven wheel 72 (i.e., the annular part) increases, the transmission belt 75 can be lengthened; if the outer diameter of the driven wheel 72 decreases, the transmission belt 75 can be shortened. In other words, the elastic transmission belt 75 can always remain taut in the application scenario where the outer diameter of the driven wheel 72 is variable, and the taut transmission belt 75 can form a stable transmission connection between the driven wheel 72 and the driving wheel 73.

[0081] In the application scenario where the elasticity of the transmission belt 75 is poor, in order to prevent the transmission belt 75 from being damaged due to excessive tension when the outer diameter of the driven wheel 72 changes, and to form a stable transmission connection between the driven wheel 72 and the driving wheel 73 through the transmission belt 75, in one embodiment of the present application, the driving assembly 7 may further include a fixed block 76, a sliding seat 77 and an elastic member 78. Figure 7 As shown, the sliding seat 77 is arranged on the bracket 71, and the sliding seat 77 and the bracket 71 form a sliding connection along the second direction, and the second direction is parallel to the radial direction of the rotating shaft 6. The driving motor 74 is arranged on the sliding seat 77. The fixing block 76 is arranged on the bracket 71, and the fixing block 76 is located between the rotating shaft 6 and the sliding seat 77. The elastic member 78 is arranged between the fixing block 76 and the sliding seat 77. The elastic member 78 stores elastic potential energy, and the elastic potential energy has a tendency to make the sliding seat 77 move away from the rotating shaft 6 along the second direction.

[0082] When in use, if the outer diameter of the driven wheel 72 increases, the pulling force applied by the transmission belt 75 to the driving wheel 73 increases. Since the driving motor 74 is arranged on the sliding seat 77 and the driving wheel 73 is arranged at the output end of the driving motor 74, the pulling force will overcome the elastic force of the elastic member 78, so that the sliding seat 77 moves in the second direction toward the direction close to the rotating shaft 6. If the sliding seat 77 moves in the second direction toward the direction close to the rotating shaft 6, the transmission belt 75 will not be damaged due to excessive tension. If the outer diameter of the driven wheel 72 decreases, the pulling force applied by the transmission belt 75 to the driving wheel 73 decreases. Since the driving motor 74 is arranged on the sliding seat 77 and the driving wheel 73 is arranged at the output end of the driving motor 74, under the elastic force of the elastic member 78, the sliding seat 77 will move in the second direction away from the rotating shaft 6. If the sliding seat 77 moves in the second direction away from the rotating shaft 6, the transmission belt 75 will not make the transmission connection between the driven wheel 72 and the driving wheel 73 unstable due to too small tension.

[0083] In the embodiment of the present application, there is no limitation on the way in which the sliding seat 77 and the bracket 71 are slidably connected. For example, the sliding seat 77 and the bracket 71 can be slidably connected via a slide rail, or by a sliding rail such as Figure 7 The sliding groove 711 shown forms a sliding connection. It is easy to understand that the sliding connection between two parts through a slide rail or a sliding groove is a mature technology and will not be described in detail this time.

[0084] In the embodiment of the present application, there is no limitation on the shape and structure of the fixing block 76. For example, the fixing block 76 may be in the shape of a square block, a triangle block, or a Figure 7 As shown in the long strip block shape etc.

[0085] In the embodiment of the present application, there is no limitation on the shape and structure of the elastic member 78, as long as it can provide the elastic potential energy described above. For example, the elastic member 78 can be a metal sheet with elasticity, or a Figure 7 Springs etc. shown.

[0086] The embodiment of the rock stress dissolution test device proposed in the present application, through the design of the ring and the stirring rod structure, makes the ring and each stirring rod not interfere with the test block or the pressure head, and when the ring rotates, it can drive each stirring rod to rotate, and the rotating stirring rod can make the concentration of the chemical solution in each place inside the test tank tend to be consistent. Compared with the rock stress dissolution test device without stirring function in the prior art, the present application can more accurately simulate the chemical erosion environment of the rock.

[0087] After introducing a rock stress dissolution test device proposed in an embodiment of the present application, the following introduces a rock stress dissolution test device proposed in the present application, which includes a pressure head 2 and a rock stress dissolution test device proposed in any one of the above embodiments.

[0088] The embodiment of the rock stress dissolution test equipment proposed in the present application, through the design of the ring and the stirring rod structure, makes the ring and each stirring rod not interfere with the test block or the pressure head, and when the ring rotates, it can drive each stirring rod to rotate, and the rotating stirring rod can make the concentration of the chemical solution in various places inside the test tank tend to be consistent. Compared with the rock stress dissolution test device without stirring function in the prior art, the present application can more accurately simulate the chemical erosion environment of the rock.

[0089] Although the embodiments of the present application 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 application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A rock stress corrosion test device, applied to a pressure test device, the pressure test device comprising a pressure head (2), characterized in that: The rock stress corrosion test device comprises: A test tank (1); a test cavity capable of accommodating a test block (8) and a chemical solution is formed inside the test tank (1); the test tank (1) is also provided with a circular opening communicating with the test cavity; An annular member (3) is arranged at the circular opening of the test tank (1); the axis of the annular member (3) coincides with the axis of the circular opening; the outer diameter of the annular member (3) matches the inner diameter of the circular opening, and the inner diameter of the annular member (3) matches the outer diameter of the pressure head (2); A plurality of stirring rods (4); each stirring rod (4) is arranged on the annular member (3); when in use, each stirring rod (4) is located in the test chamber of the test tank (1); A driving structure, used for driving the annular member (3) to rotate around the axis of the annular member (3); The annular member (3) comprises a gear ring; the driving structure comprises: Rotating shaft (6); A driving gear (5) is arranged at one end of the rotating shaft (6), and the driving gear (5) is meshed with the gear ring; A driving assembly (7) is arranged on the test tank (1); the driving assembly (7) is used to drive the rotating shaft (6) to rotate; The driving assembly (7) comprises: A bracket (71) is arranged on the test tank (1); the rotating shaft (6) is arranged on the bracket (71) and is rotationally connected to the bracket (71); A driven wheel (72) is arranged on the rotating shaft (6); the axis of the driven wheel (72) coincides with the axis of the rotating shaft (6); A driving motor (74) is arranged on the bracket (71); A driving wheel (73) is arranged at the output end of the driving motor (74); A transmission belt (75) is arranged between the driven wheel (72) and the driving wheel (73) so that the driven wheel (72) and the driving wheel (73) form a transmission connection; The rock stress corrosion test device further comprises an adjustment component, the adjustment component being used at least to adjust the rotation speed of the driven wheel (72) based on the pressing depth of the pressing head (2), so that the pressing depth of the pressing head (2) is positively correlated with the rotation speed of the driven wheel (72); The driven wheel (72) comprises a plurality of sliding blocks (721); the sliding blocks (721) are evenly distributed around the axis of the rotating shaft (6); each sliding block (721) forms a sliding connection with the rotating shaft (6) along the radial direction of the rotating shaft (6); a slot is provided at one end of each sliding block (721) away from the rotating shaft (6); the slot is adapted to fit the transmission belt (75); the adjustment component comprises: a sliding ring (722) movably sleeved on the rotating shaft (6); and the sliding ring (722) is capable of forming a sliding connection with the rotating shaft (6) along a first direction; the first direction is parallel to the axial direction of the rotating shaft (6); a first connecting rod (723) corresponding one to one with the sliding block (721); one end of the first connecting rod (723) is hinged to the sliding ring (722); the other end of the first connecting rod (723) is hinged to the corresponding sliding block (721); A bearing (724) is arranged outside the sliding ring (722); A second connecting rod (725) has one end connected to the bearing (724) and the other end used to be connected to the pressing head (2); when the pressing head (2) is pressed downward, the second connecting rod (725) causes the sliding ring (722) to move away from each sliding block (721) along the first direction.

2. The rock stress corrosion test device according to claim 1, characterized in that: The transmission belt (75) is elastic; or the driving assembly (7) further comprises: a sliding seat (77) disposed on the bracket (71); the sliding seat (77) and the bracket (71) are slidably connected along a second direction; the second direction is parallel to the radial direction of the rotating shaft (6); the driving motor (74) is disposed on the sliding seat (77); A fixed block (76) is arranged on the bracket (71); the fixed block (76) is located between the rotating shaft (6) and the sliding seat (77); An elastic member (78) is disposed between the fixed block (76) and the sliding seat (77); the elastic member (78) stores elastic potential energy, and the elastic potential energy has a tendency to cause the sliding seat (77) to move away from the rotating shaft (6) along the second direction.

3. The rock stress corrosion test device according to claim 1 or 2, characterized in that: The test tank (1) is also provided with an observation window (13), and the observation window (13) is made of a transparent material.

4. The rock stress corrosion test device according to claim 1 or 2, characterized in that: The rock stress corrosion test device also includes: A liquid inlet pipe (11), arranged on the test tank (1) and connected to the test chamber; A liquid outlet pipe (12) is arranged on the test tank (1) and is connected to the test chamber.

5. The rock stress corrosion test device according to claim 1 or 2, characterized in that: The stirring rod (4) is cylindrical, or the stirring rod (4) is spiral sheet-shaped.

6. A rock stress corrosion test equipment, characterized in that: It comprises a pressure head (2) and a rock stress corrosion testing device as claimed in any one of claims 1 to 5.

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