Triaxial pressure detection device

Abstract

The invention discloses a triaxial pressure detection device, which relates to the technical field of drilling simulation detection and comprises a mounting platform. The device has the beneficial effects that by integrating the longitudinal pressure assembly, the vertical pressure assembly and the horizontal pressure assembly and by means of the universal pressure assembly on the inner sides, pressure in three mutually perpendicular directions can be independently and accurately applied to a rock sample, the real three-direction stress state of underground rock is simulated, the tunneling unit is integrated in the pressure cavity, and the tunneling efficiency is improved. Under the condition that preset triaxial pressure is maintained, a drill bit can be directly driven to drill a pressed rock, key parameters such as drilling pressure and drilling speed are monitored in real time, the limitation that traditional rock detection equipment can only conduct uniaxial loading is overcome, and longitudinal, vertical and horizontal triaxial synchronous and multi-angle real pressure environment simulation and in-situ drilling testing are achieved.

Description

Technical Field

[0001] This invention relates to the field of drilling simulation and testing technology, and in particular to a triaxial pressure testing device. Background Technology

[0002] Traditional rock mechanics testing equipment generally suffers from two major limitations: a single loading dimension and insufficient simulation of working conditions. On the one hand, conventional devices mostly use uniaxial or biaxial loading methods (such as a press that only applies pressure vertically), which cannot reproduce the true triaxial stress state of underground rocks (i.e., simultaneous confining pressure in the longitudinal, vertical, and horizontal axes). This results in a significant deviation between experimental data and actual formation mechanical response. On the other hand, existing equipment often separates pressure testing from drilling behavior: either only testing rock strength under static pressure or simulating drilling under stress-free conditions. This fragmented operation cannot observe the dynamic rock fracture process and the interaction mechanism of the drill bit under triaxial pressure, which greatly limits the accuracy of research on drilling efficiency prediction, tool optimization, and geological disaster prevention. Summary of the Invention

[0003] In view of the above-mentioned problems in the prior art, the present invention is proposed.

[0004] The purpose of this invention is to provide a triaxial pressure detection device, which aims to solve the problem that traditional rock detection equipment cannot simultaneously achieve triaxial multi-angle pressure environment simulation and observation of loaded drilling behavior.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a triaxial pressure detection device, including an installation platform; a triaxial pressure application unit, including a longitudinal pressure component disposed on the installation platform, a vertical pressure component disposed between the longitudinal pressure components, and a horizontal pressure component disposed between the longitudinal pressure component and the vertical pressure component;

[0006] The feeding unit includes a vertical pressure component and linear components on both sides, a first hydraulic cylinder disposed between the vertical pressure component and the horizontal pressure component, and a feeding component disposed on one side of the linear component.

[0007] The tunneling unit includes a mounting box disposed at the moving end of the linear component, a second hydraulic cylinder disposed between the mounting box and the horizontal pressure component, and a drill bit disposed on the mounting box;

[0008] The inner surfaces of the longitudinal pressure assembly, the vertical pressure assembly, and the horizontal pressure assembly are all provided with universal pressure assemblies.

[0009] The horizontal pressure component is disposed on the moving end of the linear component, the fixed end of the first hydraulic cylinder is disposed on the vertical pressure component, and the moving end of the first hydraulic cylinder is disposed on the horizontal pressure component.

[0010] As a preferred embodiment of the triaxial pressure detection device of the present invention, the universal pressure assembly includes a third hydraulic cylinder and a ball head disposed at the top of the piston rod of the third hydraulic cylinder.

[0011] As a preferred embodiment of the triaxial pressure detection device of the present invention, the longitudinal pressure component includes a mounting frame disposed on the mounting platform, connecting columns disposed at each inflection point of the mounting frame, and a first reaction frame disposed on the inner side of one set of the mounting frames;

[0012] The number of mounting brackets is two sets.

[0013] As a preferred embodiment of the triaxial pressure detection device of the present invention, the vertical pressure component includes a base disposed on the mounting platform and located between the two mounting frames, a column disposed at each inflection point of the base, and a top plate disposed at the top of the column.

[0014] As a preferred embodiment of the triaxial pressure detection device of the present invention, the horizontal pressure component includes a second reaction frame and a fixed frame disposed at the moving end of the linear component, a pull rod disposed between each inflection point of the second reaction frame and the fixed frame, and an expansion guide component disposed on the pull rod.

[0015] As a preferred embodiment of the triaxial pressure detection device of the present invention, the expansion guide assembly includes a horizontal tray movably disposed on the pull rod, a pressure guide assembly disposed on the top and one side of the horizontal pressure assembly, a tray assembly disposed on the bottom of the horizontal pressure assembly, and a first spring disposed between the top pressure guide assembly and the horizontal tray.

[0016] As a preferred embodiment of the triaxial pressure detection device of the present invention, the pressure guiding assembly includes a fixed plate disposed on the pull rod, a pressure plate slidably disposed on the fixed plate, a baffle disposed on the top of the pressure plate, and a second spring disposed between the baffle and the top of the fixed plate.

[0017] In a preferred embodiment of the triaxial pressure detection device of the present invention, the tray assembly includes a fixed seat disposed on the pull rod, a lifting seat slidably disposed in the inner cavity of the fixed seat, and a third spring disposed between the lifting seat and the fixed seat.

[0018] In a preferred embodiment of the triaxial pressure detection device of the present invention, the universal pressure assembly is installed on the lower surface of the top plate, the inner side of one set of the mounting brackets, and the inner side of the fixing bracket.

[0019] In a preferred embodiment of the triaxial pressure detection device of the present invention, the linear component includes a first support frame disposed on the left side of the base, a second support frame disposed on the right side of the base, a guide rail disposed on the first support frame and the second support frame, a guide rail disposed on the top of the base, and a slider disposed on the guide rail.

[0020] The beneficial effects of the triaxial pressure detection device of the present invention are as follows: by integrating longitudinal pressure components, vertical pressure components, and horizontal pressure components, and with the help of the universal pressure component inside, it can independently and accurately apply pressure in three mutually perpendicular directions to the rock sample, simulating the real triaxial stress state of underground rock. The tunneling unit is integrated into the pressure chamber, which can directly drive the drill bit to drill into the compressed rock under the condition of maintaining the preset triaxial pressure, and monitor key parameters such as drilling pressure and drilling speed in real time. It solves the limitation of traditional rock detection equipment that can only perform single-axis loading, and realizes the simulation of real pressure environment and in-situ drilling test with simultaneous longitudinal, vertical and horizontal triaxial and multi-angle operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the feeding unit and the tunneling unit in this invention.

[0024] Figure 3 This is a schematic diagram of the structure of the linear component of the horizontal pressure component in this invention.

[0025] Figure 4 In this invention Figure 3 Enlarged view of the structure at point A in the middle.

[0026] Figure 5 This is a schematic diagram of the structure of the expansion guide component in this invention.

[0027] Figure 6 This is an exploded view of the structure of the pressure guiding component in this invention.

[0028] Figure 7 This is an exploded view of the structure of the tray assembly in this invention.

[0029] Figure 8 This is an exploded view of the structure of the universal pressure assembly in this invention.

[0030] Figure 9 This is a schematic diagram of the longitudinal pressure component in this invention.

[0031] Figure 10 This is a schematic diagram of the vertical pressure component in this invention. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0035] Reference Figures 1 to 10 This is the first embodiment of the present invention, which provides a triaxial pressure detection device, including a mounting platform 100;

[0036] The triaxial pressure unit 2 includes a longitudinal pressure assembly 21 disposed on the mounting platform 100, a vertical pressure assembly 22 disposed between the longitudinal pressure assemblies 21, and a horizontal pressure assembly 23 disposed between the longitudinal pressure assembly 21 and the vertical pressure assembly 22;

[0037] The feeding unit 3 includes a vertical pressure component 22 and linear components 31 on both sides, a first hydraulic cylinder 32 disposed between the vertical pressure component 22 and the horizontal pressure component 23, and a feeding component 33 disposed on one side of the linear component 31.

[0038] The tunneling unit 4 includes a mounting box 41 disposed at the moving end of the linear component 31, a second hydraulic cylinder 42 disposed between the mounting box 41 and the horizontal pressure component 23, and a drill bit 43 disposed on the mounting box 41.

[0039] The inner surfaces of the longitudinal pressure assembly 21, the vertical pressure assembly 22, and the horizontal pressure assembly 23 are all provided with universal pressure assemblies 200;

[0040] The horizontal pressure component 23 is disposed on the moving end of the linear component 31, the fixed end of the first hydraulic cylinder 32 is disposed on the vertical pressure component 22, and the moving end of the first hydraulic cylinder 32 is disposed on the horizontal pressure component 23.

[0041] Universal pressure assembly 200 is installed on the lower surface of top plate 223, the inner side of one set of mounting brackets 211, and the inner side of fixing bracket 232.

[0042] It should be noted that a longitudinal pressure component 21 is fixedly installed on the top of the installation platform 100, a vertical pressure component 22 is fixedly installed in the pressure area of ​​the longitudinal pressure component 21, a horizontal pressure component 23 is provided in the pressure areas of the vertical pressure component 22 and the longitudinal pressure component 21, a linear component 31 is provided on the vertical pressure component 22 and its two sides, the horizontal pressure component 23 is installed on the moving end of the linear component 31, and a first hydraulic cylinder 32 is installed between the vertical pressure component 22 and the horizontal pressure component 23. The horizontal pressure component 23 is moved to one side of the feeding component 33 by the extension and retraction of the first hydraulic cylinder 32, and the rock is moved into the horizontal pressure component 23 by the feeding component 33. The rock is moved to the pressure area of ​​the triaxial pressure unit 2 by the retraction of the first hydraulic cylinder 32.

[0043] A mounting box 41 is fixedly connected to the moving end of the linear component 31. A second hydraulic cylinder 42 is fixedly connected between the side of the horizontal pressure component 23 near the mounting box 41 and the mounting box 41. A drill bit 43 is provided on the side of the mounting box 41 near the horizontal pressure component 23. The drill bit 43 is driven to approach the rock and drill through the retraction of the second hydraulic cylinder 43.

[0044] Universal pressure components 200 are provided on the inner surfaces of the longitudinal pressure component 21, the vertical pressure component 22, and the horizontal pressure component 23. The universal pressure components 200 apply pressure to the rock in the longitudinal, vertical, and horizontal directions to achieve triaxial pressure on the rock. By reading the applied pressure of the universal pressure components 200, the rock pressure condition can be understood, thereby simulating the drilling situation under rock pressure.

[0045] When using:

[0046] I. Preloading:

[0047] 1. Start the device and check the status of the first hydraulic cylinder 32 and the second hydraulic cylinder 42 in the hydraulic system;

[0048] 2. Confirm that the triaxial pressure unit 2 is in the initial position and not under pressure;

[0049] 3. Confirm that the moving end of the linear component 31 drives the mounting box 41 and the horizontal pressure component 23 to reset to the starting point;

[0050] 4. Check that the feeding assembly 33 is ready and that rock samples are available.

[0051] II. Rock Sample Loading:

[0052] 1. The first hydraulic cylinder 32 extends, pushing its moving end, which is connected to the horizontal pressure component 23, to move along the linear component 31 toward the direction of the feeding component 33;

[0053] 2. The horizontal pressure component 23 is pushed to a suitable position near the feeding component 33;

[0054] 3. The feeding component 33 operates to push the rock sample to be tested into the predetermined bearing area inside the horizontal pressure component 23;

[0055] 4. The first hydraulic cylinder 32 retracts, pulling the horizontal pressure component 23 together with the rock sample inside it to move along the linear component 31 towards the central pressure area of ​​the triaxial pressure unit 2.

[0056] 5. The horizontal pressure component 23 is pulled back to the pressure application area, at which point the rock sample is positioned at the center of the triaxial pressure application cavity surrounded by the longitudinal, vertical, and horizontal pressure components.

[0057] III. Triaxial pressure loading:

[0058] 1. The universal pressure components 200 on the inner side of the mounting brackets 211 on both sides of the longitudinal pressure component 21, the lower surface of the top plate 223 of the vertical pressure component 22, and the inner side of the fixing bracket 232 of the horizontal pressure component 23 start applying pressure in a set sequence;

[0059] 2. The universal pressure assembly 200 applies pressure to the rock sample in three mutually perpendicular directions: the longitudinal Y-axis, the vertical Z-axis, and the horizontal X-axis.

[0060] 3. According to the experimental requirements, gradually increase the pressure values ​​in three directions to simulate the triaxial stress state of rocks in real strata;

[0061] 4. Monitor and record the pressure values ​​applied by each universal pressure component 200 in real time to understand the mechanical state of the rock under different triaxial pressures.

[0062] IV. Simulated Drilling and Tunneling Unit Actions:

[0063] 1. While maintaining the set triaxial pressure, start the tunneling unit 4;

[0064] 2. The second hydraulic cylinder 42 retracts, pulling its moving end connected to the mounting box 41 to move along the linear component 31 toward the rock sample direction;

[0065] 3. The mounting box 41 drives the drill bit 43 to approach the rock sample located in the center of the pressure zone;

[0066] 4. Drive the drill bit 43 to rotate, and control the retraction of the second hydraulic cylinder 42 to make the rotating drill bit 43 contact and drill into the rock sample under triaxial pressure.

[0067] 5. Real-time monitoring and recording of drilling pressure, drilling speed, drilling depth and other parameters during the drilling process can be calculated through the pressure of the second hydraulic cylinder 42, reflecting the drillability or destructive characteristics of the rock under specific stress conditions.

[0068] V. End of Experiment and Unloading:

[0069] 1. Stop the drill bit 43 from rotating;

[0070] 2. The second hydraulic cylinder 42 extends, pushing the mounting box 41 and the drill bit 43 away from the rock sample;

[0071] 3. Gradually reduce and eventually remove the pressure applied by the triaxial pressure unit 2 and unload the universal pressure assembly 200;

[0072] 4. The first hydraulic cylinder 32 extends and pushes the rock sample containing the drilled rock inside the horizontal pressure component 23 back to the vicinity of the feeding component 33;

[0073] 5. Remove the rock sample and debris after testing;

[0074] 6. Reset all components and turn off the system power / hydraulic source.

[0075] In summary, by integrating the longitudinal pressure component 21, the vertical pressure component 22, and the horizontal pressure component 23, and with the help of the universal pressure component 200 inside, pressure in three mutually perpendicular directions can be applied to the rock sample independently and accurately to simulate the real triaxial stress state of underground rock. The tunneling unit 4 is integrated into the pressure chamber, which can directly drive the drill bit 43 to drill into the compressed rock while maintaining the preset triaxial pressure. Key parameters such as drilling pressure and drilling speed can be monitored in real time. This solves the limitation of traditional rock testing equipment that can only perform single-axis loading, and realizes the simulation of real pressure environment and in-situ drilling test with simultaneous longitudinal, vertical, and horizontal triaxial and multi-angle operation.

[0076] like Figures 1 to 10 As shown, as an optional embodiment, the universal pressure assembly 200 includes a third hydraulic cylinder 201 and a ball head 202 disposed at the top of the piston rod of the third hydraulic cylinder 201.

[0077] It should be noted that the ball head 202 is slidably disposed in the inner cavity of the piston rod output end face of the third hydraulic cylinder 201. As the third hydraulic cylinder 201 applies pressure, the ball head 202 will change angle and fit with the pressure surface, without tilting. This can prevent oil leakage caused by tilting of the pressure angle during the pressure application process of the hydraulic cylinder 201.

[0078] like Figure 9 As shown, as an optional embodiment: the longitudinal pressure assembly 21 includes a mounting frame 211 disposed on the mounting platform 100, a connecting column 212 disposed at each inflection point of the mounting frame 211, and a first reaction frame 213 disposed on the inner side of one set of mounting frames 211;

[0079] There are two sets of mounting brackets 211.

[0080] It should be noted that there are two sets of mounting brackets 211, which are fixedly installed on both sides of the base 221. The two mounting brackets 211 are connected by connecting columns 212. The inner sides of the two mounting brackets 211 are respectively fixedly connected to the universal pressure assembly 200 and the first reaction frame 213. When the rock is located in the pressure zone, pressure is applied by the universal pressure assembly 200, and the first reaction frame 213 forms a reaction surface on the other side of the rock to complete the longitudinal pressure.

[0081] like Figure 10 As shown, as an optional embodiment, the vertical pressure assembly 22 includes a base 221 disposed on the mounting platform 100 and located between two mounting brackets 211, columns 222 disposed at each inflection point of the base 221, and a top plate 223 disposed at the top of the columns 222.

[0082] It should be noted that each inflection point of the base 221 is fixedly connected to a column 222, the top of the column 222 is fixedly connected to a top plate 223, and the bottom of the top plate 223 is fixedly connected to a universal pressure assembly 200. The universal pressure assembly 200 applies pressure to the top of the rock to complete the vertical pressure.

[0083] like Figures 3 to 5 As shown, as an optional embodiment, the horizontal pressure assembly 23 includes a second reaction frame 231 and a fixed frame 232 disposed at the moving end of the linear assembly 31, a tie rod 233 disposed between each inflection point of the second reaction frame 231 and the fixed frame 232, and an expansion guide assembly 234 disposed on the tie rod 233.

[0084] It should be noted that tie rods 233 are fixedly connected between each corner of the second reaction frame 231 and the fixed frame 232. The two are fixedly connected by tie rods 233 to form the main frame of the horizontal pressure component 23. A universal pressure component 200 is fixedly connected to the inner side of the fixed frame 232. The universal pressure component 200 applies pressure to the second reaction frame 231, and the second reaction frame 231 forms a reaction surface on the other side of the rock to complete the horizontal pressure. In order to make the rock more evenly compressed, an expansion guide component 234 is also provided on the tie rod 233. The guide surface is separated from the vertical and longitudinal directions to avoid interfering with the movement of the horizontal pressure component 23.

[0085] like Figures 1 to 7 As shown, as an optional embodiment, the expansion guide assembly 234 includes a horizontal tray 2341 movably disposed on the pull rod 233, a pressure guide assembly 2342 disposed on the top and one side of the horizontal pressure assembly 23, a tray assembly 2343 disposed on the bottom of the horizontal pressure assembly 23, and a first spring 2344 disposed between the top pressure guide assembly 2342 and the horizontal tray 2341.

[0086] The pressure guiding assembly 2342 includes a fixed plate 2342-a disposed on the pull rod 233, a pressure plate 2342-b slidably disposed on the fixed plate 2342-a, a baffle 2342-c disposed on the top of the pressure plate 2342-b, and a second spring 2342-d disposed between the baffle 2342-c and the top of the fixed plate 2342-a;

[0087] The pallet assembly 2343 includes a fixed seat 2343-a disposed on the pull rod 233, a lifting seat 2343-b slidably disposed in the inner cavity of the fixed seat 2343-a, and a third spring 2343-c disposed between the lifting seat 2343-b and the fixed seat 2343-a.

[0088] It should be noted that a horizontal tray 2341 is hung on the two pull rods 233 at the top. A pressure guide component 2342 is fixedly connected to the top and one side of the horizontal pressure component 23 via the pull rods 233. A first spring 2344 is provided between the pressure guide component 2342 at the top and the horizontal tray 2341. In the unpressurized state, the first spring 2344 will squeeze the horizontal tray 2341 to expand the pressure area and ensure that it will not cause any impact during the feeding process.

[0089] The fixed plate 2342-a is fixedly installed on the pull rod 233. The pressure plate 2342-b is slidably connected in the inner cavity of the fixed plate 2342-a. The baffle 2342-c is fixedly connected to the top of the pressure plate 2342-b. The second spring 2343-d between the baffle 2342-c and the fixed plate 2342-a will squeeze the baffle 2342-c when not under pressure, thus expanding the pressure area and ensuring that it will not cause any impact during the feeding process.

[0090] The fixed seat 2343-a is installed on the two pull rods 233 at the bottom. The lifting seat 2343-b is slidably connected to the inner cavity of the fixed seat 2343-a. A third spring 2343-c is provided between the lifting seat 2343-b and the fixed seat 2343-a. When the rock is located on the lifting seat 2343-b in the unpressurized state, the third spring 2343-c will lift the lifting seat 2343-b to prevent the lifting seat 2343-b from contacting the base 221 when the rock is moved.

[0091] In use, pressure is applied by the universal pressure assembly 200 pressing the horizontal pallet 2341 and the baffle 2342-c. The horizontal pallet 2341 and the baffle 2342-c have a larger contact surface with the rock, making the rock's stress surface larger and more uniform. Furthermore, the horizontal pallet 2341 and the baffle 2342-c are both located on the horizontal pressure assembly 23, which is separate from the vertical and longitudinal components and will not interfere with the movement of the horizontal pressure assembly 23. In the unpressurized state, the first spring 2344 will press the horizontal pallet 2341, and the second spring 2343-d will press the baffle 2342-c, expanding the pressure area and ensuring that it will not cause any impact during the feeding process.

[0092] like Figure 3 As shown, as an optional embodiment, the linear component 31 includes a first support frame 311 disposed on the left side of the base 221, a second support frame 312 disposed on the right side of the base 221, a guide rail 313 disposed on the first support frame 311, the second support frame 312, and the top of the base 221, and a slider 314 disposed on the guide rail 313.

[0093] It should be noted that the first support frame 311 and the second support frame 312 are fixedly connected to the left and right sides of the base 221, respectively. The first support frame 311, the second support frame 312, and the top of the base 221 are fixedly connected to the guide rail 313, and the slider 314 is fixedly connected to the guide rail 313.

[0094] In use, the extension of the first hydraulic cylinder 32 allows the mounting box 41 and the horizontal pressure assembly 23 to slide more smoothly on the guide rail 313 via the slider 314, reducing the driving pressure of the first hydraulic cylinder 32.

[0095] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A triaxial pressure cell, characterized by: The three-axis pressure detection device comprises a mounting platform (100), a longitudinal pressure assembly (21) arranged on the mounting platform (100), a vertical pressure assembly (22) arranged between the longitudinal pressure assemblies (21), and a horizontal pressure assembly (23) arranged between the longitudinal pressure assemblies (21) and the vertical pressure assembly (22). The three-axis pressure detection device comprises a mounting platform (100), a longitudinal pressure assembly (21) arranged on the mounting platform (100), a vertical pressure assembly (22) arranged between the longitudinal pressure assemblies (21), and a horizontal pressure assembly (23) arranged between the longitudinal pressure assemblies (21) and the vertical pressure assembly (22). The three-axis pressure detection device comprises a mounting platform (100), a longitudinal pressure assembly (21) arranged on the mounting platform (100), a vertical pressure assembly (22) arranged between the longitudinal pressure assemblies (21), and a horizontal pressure assembly (23) arranged between the longitudinal pressure assemblies (21) and the vertical pressure assembly (22). The three-axis pressure detection device comprises a mounting platform (100), a longitudinal pressure assembly (21) arranged on the mounting platform (100), a vertical pressure assembly (22) arranged between the longitudinal pressure assemblies (21), and a horizontal pressure assembly (23) arranged between the longitudinal pressure assemblies (21) and the vertical pressure assembly (22). The three-axis pressure detection device comprises a mounting platform (100), a longitudinal pressure assembly (21) arranged on the mounting platform (100), a vertical pressure assembly (22) arranged between the longitudinal pressure assemblies (21), and a horizontal pressure assembly (23) arranged between the longitudinal pressure assemblies (21) and the vertical pressure assembly (22). The three-axis pressure detection device comprises a mounting platform (100), a longitudinal pressure assembly (21) arranged on the mounting platform (100), a vertical pressure assembly (22) arranged between the longitudinal pressure assemblies (21), and a horizontal pressure assembly (23) arranged between the longitudinal pressure assemblies (21) and the vertical pressure assembly (22).

2. The three-axis pressure detection device according to claim 1, wherein the universal pressure assembly (200) comprises a third hydraulic cylinder (201) and a ball head (202) arranged at the top end of the piston rod of the third hydraulic cylinder (201).

3. The three-axis pressure detection device according to claim 2, wherein the longitudinal pressure assembly (21) comprises a mounting frame (211) arranged on the mounting platform (100), connecting columns (212) arranged at each inflection point of the mounting frame (211), and a first counterforce frame (213) arranged at the inner side of one of the mounting frames (211).

4. The three-axis pressure detection device according to claim 3, wherein the vertical pressure assembly (22) comprises a base (221) arranged on the mounting platform (100) and located between the two mounting frames (211), stand columns (222) arranged at each inflection point of the base (221), and a top plate (223) arranged at the top end of the stand columns (222).

5. The three-axis pressure detection device according to claim 4, wherein the horizontal pressure assembly (23) comprises a second counterforce frame (231) and a fixed frame (232) arranged at the moving end of the linear assembly (31), pull rods (233) arranged between each inflection point of the second counterforce frame (231) and the fixed frame (232), and an expansion guide assembly (234) arranged on the pull rods (233). ​ ​ ​ ​ ​ 6.The triaxial pressure detection device of claim 5, wherein: the expansion guide assembly (234) comprises a horizontal tray (2341) movably arranged on the pull rod (233), a pressure guide assembly (2342) arranged on the top and one side of the horizontal pressure assembly (23), a tray assembly (2343) arranged on the bottom of the horizontal pressure assembly (23), and a first spring (2344) arranged between the pressure guide assembly (2342) on the top and the horizontal tray (2341). 7.The triaxial pressure detection device of claim 6, wherein: the pressure guide assembly (2342) comprises a fixed plate (2342-a) arranged on the pull rod (233), a pressure plate (2342-b) slidably arranged on the fixed plate (2342-a), a baffle (2342-c) arranged on the top of the pressure plate (2342-b), and a second spring (2342-d) arranged between the baffle (2342-c) and the top of the fixed plate (2342-a). 8.The triaxial pressure detection device of claim 6, wherein: the tray assembly (2343) comprises a fixed seat (2343-a) arranged on the pull rod (233), a lifting seat (2343-b) slidably arranged in the inner cavity of the fixed seat (2343-a), and a third spring (2343-c) arranged between the lifting seat (2343-b) and the fixed seat (2343-a). 9.The triaxial pressure detection device of claim 5, wherein: the lower surface of the top plate (223), the inner side of one set of the mounting frames (211), and the inner side of the fixed frame (232) are all installed with the universal pressure assembly (200). 10.The triaxial pressure detection device of claim 4, wherein: the linear assembly (31) comprises a first support frame (311) arranged on the left side of the base (221), a second support frame (312) arranged on the right side of the base (221), a guide rail (313) arranged on the top of the first support frame (311), the second support frame (312), and the base (221), and a sliding block (314) arranged on the guide rail (313).

Images