A reusable full-sensing stress measurement mechanism and usage method

Abstract

The present invention relates to the field of ground stress detection technology, and discloses a reusable full-sensing stress measurement mechanism and a method for using the mechanism, wherein a glue injection hole is opened on the side wall of the outer cylinder of the stress gauge, and a plastic film is arranged in the glue injection hole; when the inner cylinder of the stress gauge slides along the outer cylinder of the stress gauge, the inner cylinder of the stress gauge can be rotated by a first linkage mechanism; the gear sleeve can be detachably connected to the inner cavity of the inner cylinder of the stress gauge by a clamping mechanism, and when the inner cylinder of the stress gauge rotates, the gear sleeve can be driven to rotate synchronously by a second linkage mechanism, the clamping mechanism has an assembly position and a disassembly position, and when the gear sleeve rotates, the clamping mechanism can be switched between the assembly position and the disassembly position; when the gear sleeve rotates, the gear sleeve can be made to slide along the telescopic sleeve by a third linkage mechanism; the sensor module is used to be detachably connected to the telescopic sleeve. The present invention is convenient to use, adaptable to various drilling conditions, and the sensor module can be promptly withdrawn and reused.

Description

Technical Field

[0001] The present invention relates to the technical field of ground stress detection, and in particular to a reusable full-sensing stress measurement mechanism and a use method thereof. Background Art

[0002] Hollow inclusion stress gauges can realize in-situ ground stress testing in underground projects such as mines and tunnels through the stress relief method, which is of great significance for guiding engineering design and preventing dynamic disasters.

[0003] To obtain accurate and reliable raw geostress data in underground engineering projects, the measurement point must be placed as far away as possible from mining-disturbed areas. Test drilling footage often exceeds three times the cross-sectional width of the tunnel. Traditional push rod pushing methods have a low success rate due to the long hole depth, and because the epoxy resin colloid has not yet solidified, the push rod cannot be withdrawn in time, limiting tunnel functionality. Although patented multi-sensor methods using fisheye lenses, pressure-sensitive force gauges, and other methods have solved the visualization problem to some extent, they are still limited by the following deficiencies:

[0004] (1) The manufacturing cost is high and the device cannot be reused. Each sensor module will be fixed in the test core together with the stress gauge by epoxy resin. The damage rate is extremely high during the secondary coring and core testing process, and it is basically impossible to reuse. (2) The push rod cannot be pulled out of the test borehole in time. After the existing hollow inclusion stress gauge is injected, it is necessary to wait for the epoxy resin to completely solidify before the push rod can be pulled out. The end of the push rod occupies the tunnel space for a long time, affecting normal operation. (3) Pure visual sensors have poor applicability. After the test borehole is formed, silt or fog often accumulates in the hole. Relying solely on visual sensors requires repeated wiping of the lens to remove fog and mud. Summary of the Invention

[0005] The purpose of the present invention is to provide a reusable full-sensing stress measurement mechanism and method of use, aiming to solve or improve at least one of the above-mentioned technical problems. It is easy to use, adaptable to various drilling conditions, and the sensor module can be pulled out and reused in time.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a reusable full-sensing stress measurement mechanism, comprising:

[0007] The outer cylinder of the strain gauge has a glue injection hole on its side wall, and a plastic film is arranged in the glue injection hole;

[0008] The strain gauge inner cylinder is adapted to slidably cooperate with the inner cavity of the strain gauge outer cylinder, the strain gauge inner cylinder being capable of squeezing the glue injection liquid in the strain gauge outer cylinder through the glue injection hole, and the strain gauge inner cylinder being capable of rotating through a first linkage mechanism when the strain gauge inner cylinder slides along the strain gauge outer cylinder;

[0009] The gear sleeve can be detachably connected to the inner cavity of the strain gauge inner cylinder through a clamping mechanism. When the strain gauge inner cylinder rotates, the gear sleeve can be driven to rotate synchronously through a second linkage mechanism. The clamping mechanism has an assembly position and a disassembly position. When the gear sleeve rotates, the clamping mechanism can switch between the assembly position and the disassembly position.

[0010] a telescopic sleeve, adapted to slidably engage with the inner cavity of the gear sleeve, and wherein a third linkage mechanism enables the gear sleeve to slide along the telescopic sleeve when the gear sleeve rotates;

[0011] The sensor module is used to be detachably connected to the telescopic sleeve, and the sensor module can extend through the inner cavity of the outer cylinder of the strain gauge.

[0012] Optionally, the stress gauge outer cylinder includes:

[0013] The first sleeve has the glue injection hole opened on its side wall;

[0014] The second sleeve is fixedly connected to the inner cavity of the first sleeve. A glue injection cavity connected to the glue injection hole is formed between the second sleeve and the first sleeve. One end of the glue injection cavity away from the glue injection hole is open for inserting the inner cylinder of the strain gauge.

[0015] Optionally, a first slot is circumferentially opened on the inner side wall of one end of the first sleeve away from the glue injection hole, and a sealing gasket is installed in the first slot, and the sealing gasket is used to seal the open end of the glue injection cavity.

[0016] Optionally, one end of the second sleeve away from the open end of the glue injection cavity is fixedly connected to and communicated with a tapered sleeve, and the sensor module can extend through the tapered sleeve.

[0017] Optionally, a pair of rubber sealing rings are fixedly connected to the outer side wall of the first sleeve, and the glue injection hole is located between the pair of rubber sealing rings.

[0018] Optionally, the first linkage mechanism includes:

[0019] a spiral groove, formed on the inner wall of the outer cylinder of the strain gauge;

[0020] The first roller is used for slidingly cooperating with the spiral groove, and the first roller is fixedly connected to the outer side wall of the inner cylinder of the strain gauge.

[0021] Optionally, the second linkage mechanism includes:

[0022] An internal tooth structure is provided on the inner side wall of the inner cylinder of the strain gauge;

[0023] A connecting rod is rotatably connected to the gear sleeve via a gear bearing, and the gear bearing is used to mesh with the internal gear structure.

[0024] Optionally, the third linkage mechanism includes:

[0025] A spiral through groove is provided on the side wall of the gear sleeve;

[0026] The second roller is used for slidingly cooperating with the spiral through groove, and the second roller is fixedly connected to the outer side wall of the telescopic sleeve.

[0027] Optionally, the clamping mechanism includes:

[0028] A second slot is circumferentially provided on the inner side wall of the inner cylinder of the strain gauge close to the inner tooth structure;

[0029] a pair of openings, provided at the end of the inner cylinder of the strain gauge close to the inner tooth structure, the openings being in communication with the second slot;

[0030] The convex tooth is fixedly connected to the outer side wall of the gear sleeve, and the convex tooth can be inserted into or removed from the second slot through the opening.

[0031] The present invention also provides a method for using a reusable full-sensing stress measurement mechanism, comprising the following steps:

[0032] Assembling the strain gauge outer cylinder, the strain gauge inner cylinder, the gear sleeve, the telescopic sleeve, and the sensor module;

[0033] Connect the gear sleeve to the thrust device and push it into the borehole;

[0034] When the outer cylinder of the strain gauge contacts the bottom surface of the drill hole, the pushing force is increased to squeeze and release the injection liquid, and the telescopic sleeve is retracted to retract the sensor module;

[0035] The gear sleeve, the telescopic sleeve and the sensor module are taken out, and the outer cylinder and the inner cylinder of the strain gauge are left in the drilled hole.

[0036] The present invention discloses the following technical effects:

[0037] The present invention can realize the timely recycling and utilization of multi-sensor terminals, greatly reducing the cost of ground stress testing. Through the first linkage mechanism, the second linkage mechanism and the clamping mechanism, the vertical propulsion movement of the inner cylinder of the strain gauge is linked to the clockwise rotation of the inner cylinder of the strain gauge, thereby driving the gear sleeve synchronously, realizing the switching of the assembly position and the disassembly position, and realizing the disassembly of the gear sleeve and the inner cylinder of the strain gauge, so that the sensor module can be pulled out while the outer cylinder and the inner cylinder of the strain gauge are retained in the small drill hole, thereby realizing the reuse of high-value sensors.

[0038] The present invention can protect the key sensor module in real time. The telescopic sleeve is connected to the sensor module. Through the third linkage mechanism, when the outer cylinder of the strain gauge reaches the bottom of the small drill hole and starts to push, the clockwise rotation of the gear sleeve will drive the telescopic sleeve to rotate in conjunction and retract into the gear sleeve, thereby ensuring that the sensor module components will not be damaged by friction with the hole wall or bottom during the recovery process.

[0039] The present invention is more adaptable to complex drilling environments, especially test boreholes containing silt or water vapor. By blocking with a sealing gasket, it can avoid premature release of epoxy resin colloid due to small gravel in the hole or manual operation errors during the pushing process; through laser radar image transmission and infrared distance perception, it can display the hole wall structure and the level of cracks in the hole in real time on the data terminal screen, which is used to align small boreholes with a diameter of 36mm, judge whether the integrity of the test borehole rock formation meets the requirements, and avoid unclear pure visual image transmission due to water vapor and silt in the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 This is a schematic structural diagram of the outer cylinder of the stress gauge of the present invention;

[0043] Figure 3 is a cross-sectional view of the outer cylinder of the strain gauge of the present invention;

[0044] Figure 4 This is a schematic diagram of the inner cylinder structure of the strain gauge of the present invention;

[0045] Figure 5 This is a schematic diagram of the gear sleeve structure of the present invention;

[0046] Figure 6 It is a schematic diagram of the telescopic sleeve structure of the present invention;

[0047] Figure 7 This is a schematic structural diagram of the sensor module of the present invention;

[0048] Figure 8 It is a schematic diagram of the assembly structure of the present invention;

[0049] Figure 9 This is a schematic diagram of the structure after glue injection of the present invention;

[0050] Figure 10Schematic diagram of the arrangement of the strain gauge on the outer wall of the outer cylinder of the present invention.

[0051] In the picture:

[0052] 1. Outer cylinder of strain gauge; 101. Conical sleeve; 102. Spiral groove; 103. Glue injection hole; 104. Plastic film; 105. First slot; 106. Sealing gasket; 107. Rubber sealing ring;

[0053] 2. Inner cylinder of strain gauge; 201. First roller; 202. Internal tooth structure; 203. Opening;

[0054] 3. Gear sleeve; 301. Gear bearing; 302. Spiral groove; 303. Raised tooth; 304. Thread;

[0055] 4. Telescopic sleeve; 401. Second roller; 402. Internal thread;

[0056] 5. Sensor module; 501. External thread; 502. High-transparency acrylic cover; 503. LiDAR lens; 504. Infrared distance sensor; 505. Electronic compass; 506. Integrated wiring harness;

[0057] 6. Strain gauge. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Reference Figures 1-10 The present invention provides a reusable full-sensing stress measurement mechanism, comprising:

[0061] The outer cylinder 1 of the strain gauge has a glue injection hole 103 on its side wall, and a plastic film 104 is provided in the glue injection hole 103 to prevent the glue injection liquid from leaking out;

[0062] The strain gauge inner cylinder 2 is adapted to slidably engage with the inner cavity of the strain gauge outer cylinder 1. The strain gauge inner cylinder 2 is capable of squeezing the glue injection liquid in the strain gauge outer cylinder 1 through the glue injection hole 103. When the strain gauge inner cylinder 2 slides along the strain gauge outer cylinder 1, the first linkage mechanism can cause the strain gauge inner cylinder 2 to rotate.

[0063] The gear sleeve 3 can be detachably connected to the inner cavity of the strain gauge inner cylinder 2 through a clamping mechanism. When the strain gauge inner cylinder 2 rotates, the gear sleeve 3 can be driven to rotate synchronously through the second linkage mechanism. The clamping mechanism has an assembly position and a disassembly position. When the gear sleeve 3 rotates, the clamping mechanism can be switched between the assembly position and the disassembly position.

[0064] The telescopic sleeve 4 is used to slidably cooperate with the inner cavity of the gear sleeve 3. When the gear sleeve 3 rotates, the gear sleeve 3 can slide along the telescopic sleeve 4 through the third linkage mechanism;

[0065] The sensor module 5 is used to be detachably connected to the telescopic sleeve 4 , and the sensor module 5 can extend through the inner cavity of the strain gauge outer cylinder 1 .

[0066] Through the first linkage mechanism, the second linkage mechanism and the clamping mechanism, the vertical propulsion movement of the strain gauge inner cylinder 2 is linked to the clockwise rotation of the strain gauge inner cylinder 2, thereby driving the gear sleeve 3 synchronously, realizing the switching of the assembly position and the disassembly position, and realizing the disassembly of the gear sleeve 3 and the strain gauge inner cylinder 2, thereby retaining the strain gauge outer cylinder 1 and the strain gauge inner cylinder 2 in the small drill hole while extracting the sensor module 5, thereby realizing the reuse of high-value sensors.

[0067] The telescopic sleeve 4 is connected to the sensor module 5. Through the third linkage mechanism, when the strain gauge outer tube 1 reaches the bottom of the small drill hole and starts to push, the clockwise rotation of the gear sleeve 3 will drive the telescopic sleeve 4 to rotate in conjunction and retract into the gear sleeve 3, thereby ensuring that the sensor module 5 components will not be damaged by friction with the hole wall or bottom during the recovery process.

[0068] Furthermore, the injection liquid is epoxy resin.

[0069] In one embodiment of the present invention, the strain gauge outer cylinder 1 comprises:

[0070] The first sleeve has a glue injection hole 103 on its side wall;

[0071] The second sleeve is fixedly connected to the inner cavity of the first sleeve. A glue injection cavity connected to the glue injection hole 103 is formed between the second sleeve and the first sleeve. One end of the glue injection cavity away from the glue injection hole 103 is open for inserting the strain gauge inner cylinder 2.

[0072] By pulling the strain gauge inner cylinder 2 out of the glue injection cavity, the glue injection liquid can be filled into the glue injection cavity through the open end thereof.

[0073] In one embodiment of the present invention, a first slot 105 is circumferentially opened on the inner side wall of the first sleeve away from the glue injection hole 103. The first slot 105 is used to install a sealing gasket 106, which is used to seal the open end of the glue injection cavity.

[0074] After the glue injection liquid is filled, the sealing gasket 106 is installed in the first slot 105 to seal the open end of the glue injection cavity, thereby preventing the glue injection liquid from being released in advance.

[0075] In one embodiment of the present invention, one end of the second sleeve away from the open end of the glue injection cavity is fixedly connected to and communicated with a tapered sleeve 101 , and the sensor module 5 can extend through the tapered sleeve 101 .

[0076] In one embodiment of the present invention, a pair of rubber sealing rings 107 are fixedly connected to the outer side wall of the first sleeve, and the glue injection hole 103 is located between the pair of rubber sealing rings 107 .

[0077] The outer diameter of the rubber sealing ring 107 is slightly larger than the aperture of the small hole for the ground stress test, ensuring that the injected glue liquid fully contacts the outer cylinder 1 of the stress gauge with the surrounding rock mass and completely solidifies.

[0078] In one embodiment of the present invention, the first linkage mechanism includes:

[0079] The spiral groove 102 is formed on the inner wall of the outer cylinder 1 of the strain gauge;

[0080] The first roller 201 is used for sliding engagement with the spiral groove 102 . The first roller 201 is fixedly connected to the outer wall of the inner cylinder 2 of the strain gauge.

[0081] The diameter of the first roller 201 is consistent with the width of the spiral groove 102 , and the two are engaged to achieve the coordination of axial linear motion and rotational motion of the strain gauge outer cylinder 1 and the strain gauge inner cylinder 2 .

[0082] In one embodiment of the present invention, the second linkage mechanism includes:

[0083] The inner tooth structure 202 is provided on the inner wall of the inner cylinder 2 of the strain gauge;

[0084] The connecting rod is rotatably connected to the gear sleeve 3 through the gear bearing 301 , and the gear bearing 301 is used to mesh with the internal gear structure 202 .

[0085] The internal gear structure 202 is meshed with the gear bearing 301 to transmit the clockwise rotation of the strain gauge inner cylinder 2 to the gear sleeve 3 .

[0086] Furthermore, the connecting rod is connected to the push rod of the thrust device via a thread 304 .

[0087] In one embodiment of the present invention, the third linkage mechanism includes:

[0088] The spiral groove 302 is formed on the side wall of the gear sleeve 3;

[0089] The second roller 401 is used for slidingly cooperating with the spiral groove 302 . The second roller 401 is fixedly connected to the outer wall of the telescopic sleeve 4 .

[0090] The spiral groove 302 is meshed with the second roller 401 to convert the clockwise rotation of the gear sleeve 3 into the contraction movement of the telescopic sleeve 4 into the gear sleeve 3, so that the front end of the sensor module 5 is always kept at the same level with the outer cylinder 1 of the strain gauge to prevent damage to the sensor module 5.

[0091] In one embodiment of the present invention, the clamping mechanism includes:

[0092] The second slot is circumferentially provided on the inner wall of the strain gauge inner cylinder 2 at one end close to the inner tooth structure 202;

[0093] A pair of openings 203 are provided on the end of the strain gauge inner cylinder 2 near the inner tooth structure 202, and the openings 203 are connected to the second slot;

[0094] The protruding tooth 303 is fixedly connected to the outer wall of the gear sleeve 3 , and the protruding tooth 303 can be inserted into or removed from the second slot through the opening 203 .

[0095] By controlling the rotation angle of the gear sleeve 3 , the assembly position and the disassembly position can be switched through the cooperation of a pair of openings 203 and the protruding teeth 303 , thereby realizing the disassembly of the gear sleeve 3 from the strain gauge inner cylinder 2 .

[0096] Furthermore, an external thread 501 is provided at the tail of the sensor module 5, and an internal thread 402 is provided at the front end of the telescopic sleeve 4, which is used to cooperate with the external thread 501 to realize the disassembly and assembly of the sensor module 5 and the telescopic sleeve 4. The front part is a hemispherical high-transparency acrylic shield 502, which protects the internal lidar lens 503, infrared distance sensor 504 and electronic compass 505. The two-in-one wiring harnesses of each sensor data and power supply are combined into an integrated wiring harness 506 wrapped with nylon rope and extend from the tail of the sensor module.

[0097] The present invention also provides a method for using a reusable full-sensing stress measurement mechanism, comprising the following steps:

[0098] Assemble the strain gauge outer cylinder 1, strain gauge inner cylinder 2, gear sleeve 3, telescopic sleeve 4, and sensor module 5; connect the gear sleeve 3 to the thrust device and push it into the drill hole; when the strain gauge outer cylinder 1 contacts the bottom surface of the drill hole, increase the pushing force to squeeze and release the injection liquid and retract the telescopic sleeve 4 to recover the sensor module 5; remove the gear sleeve 3, telescopic sleeve 4, and sensor module 5, and leave the strain gauge outer cylinder 1 and strain gauge inner cylinder 2 in the drill hole. Specifically:

[0099] According to the drilling footage designed in the geostress test plan, a large borehole with a diameter of 130 mm is drilled in the rock stratum, and a small borehole with a diameter of 36 mm is drilled inward from the bottom of the large borehole according to the designed depth;

[0100] Check the integrity of the plastic film 104 and the rubber sealing ring 107 of the glue injection hole 103 on the strain gauge outer cylinder 1, rotate and pull out the strain gauge inner cylinder 2, inject the fully stirred epoxy resin colloid into the strain gauge outer cylinder 1 to the glue injection line, install the paper sealing gasket 106 into the first slot 105 of the strain gauge outer cylinder 1, and then insert the first roller on the front of the strain gauge inner cylinder 2 into the spiral groove 102 on the inner wall of the strain gauge outer cylinder 1. At this point, the stress gauge main body is assembled.

[0101] Make the second roller 401 on the telescopic sleeve 4 be at the front end of the spiral groove 302 of the gear sleeve 3, connect the sensor module 5 to the telescopic sleeve 4 through threads, extend the power supply and data transmission integrated harness 506 of the laser radar lens 503 through the telescopic sleeve 4 and the hollow cylinder wall of the gear sleeve 3, connect the completed assembly to the strain gauge inner cylinder 2 through the gear bearing 301 of the gear sleeve 3, check whether the laser radar lens 503 protrudes from the strain gauge outer cylinder 1, if so, continue to install the strain gauge, if not, recheck whether the position of the telescopic sleeve 4 is installed correctly.

[0102] Connect the push rod of the thrust device to the gear sleeve 3, and push the assembled device into the large borehole drilled in advance in the rock formation through the push rod. If the straight-line distance between the ground stress measuring point and the hole mouth exceeds 10m, the strain gauge should be pushed into the borehole with the help of an auxiliary positioning rod in a trajectory that is as concentric as possible with the small borehole.

[0103] While advancing in the large borehole, the laser radar lens 503 is used to visually reconstruct the surrounding rock of the borehole wall to determine the integrity of the surrounding rock in the area of ​​the ground stress measurement point. If the surrounding rock near the small borehole is too fragmented or the cracks are too deep, it cannot meet the requirements of the ground stress test. All equipment must be withdrawn and a new measurement point must be selected for testing.

[0104] If the integrity and flatness of the surrounding rock of the hole wall meet the test requirements, continue to install the push rod in a circular manner to push the entire device into the small borehole. Use the laser radar depth imaging to determine the distance between the stress gauge outer cylinder 1 and the small borehole and whether the center is aligned. After the tapered sleeve 101 at the front of the stress gauge outer cylinder 1 approaches the small borehole opening and the center is adjusted, slowly push the push rod to push the stress gauge outer cylinder 1 to the bottom of the test small borehole, record the inclination of the electronic compass 505 at this time, and reset the rotation angle to zero.

[0105] Push the push rod with force. At this time, the outer cylinder 1 of the strain gauge is constrained and cannot rotate because it is close to the bottom of the hole. The forward force of the push rod is converted into the rotational movement of the inner cylinder 2 of the strain gauge, the gear sleeve 3, and the telescopic sleeve 4 in sequence, realizing the extrusion and release of the epoxy resin in the outer cylinder 1 of the strain gauge and the contraction and recovery of the telescopic sleeve 4 to recover the sensor module 5.

[0106] Observe the rotation angle displayed on electronic compass 505. When the internal telescopic sleeve 4 rotates 180°, the strain gauge outer cylinder 1 and the strain gauge inner cylinder 2 are fully engaged, and the epoxy resin inside them has been completely released. Simultaneously, the opening 203 at the disassembly position of the strain gauge inner cylinder 2 is realigned with the protruding teeth 303 of the gear sleeve 3. Pulling the push rod backward will remove the gear sleeve 3, telescopic sleeve 4, and sensor module 5 together. The hollow stress gauge formed by the strain gauge outer cylinder 1 and strain gauge inner cylinder 2 will remain in the small drilled hole, allowing stress release measurement.

[0107] The measurement principle is:

[0108] like Figure 9 As shown, three groups of strain gauges 6, A, B, and C, are arranged on the outer cylinder 1 of the strain gauge at intervals of 120° along the central axis. Each group of strain gauges 6 includes four strain gauges 6, and their azimuth angles are 0°, 45°, 90°, and 120°, respectively. During the stress relief process, the strain gauges respectively record the strains in all directions of the outer cylinder 1 of the strain gauge, and the inversion of the stress state of the borehole at that location is realized through the following formula.

[0109]

[0110] Where, , , ( is the number of strain gauges 6 in a set of strain gauges 6), For the Strain gauge 6 The angle between the direction of the strain gauge 6 and the axial direction of the strain gauge.

[0111] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0112] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A reusable full-sensing stress measurement mechanism, characterized in that: include: The outer cylinder (1) of the strain gauge has a glue injection hole (103) on its side wall, and a plastic film (104) is provided in the glue injection hole (103); The stress gauge inner cylinder (2) is used to slidably cooperate with the inner cavity of the stress gauge outer cylinder (1), and the stress gauge inner cylinder (2) can extrude the glue injection liquid in the stress gauge outer cylinder (1) through the glue injection hole (103). When the stress gauge inner cylinder (2) slides along the stress gauge outer cylinder (1), the stress gauge inner cylinder (2) can be rotated through the first linkage mechanism; The gear sleeve (3) can be detachably connected to the inner cavity of the strain gauge inner cylinder (2) through a clamping mechanism, and when the strain gauge inner cylinder (2) rotates, the gear sleeve (3) can be driven to rotate synchronously through a second linkage mechanism. The clamping mechanism has an assembly position and a disassembly position, and when the gear sleeve (3) rotates, the clamping mechanism can be switched between the assembly position and the disassembly position. A telescopic sleeve (4) is used to slidably cooperate with the inner cavity of the gear sleeve (3), and when the gear sleeve (3) rotates, the gear sleeve (3) can slide along the telescopic sleeve (4) through a third linkage mechanism; A sensor module (5) is used to be detachably connected to the telescopic sleeve (4), and the sensor module (5) can extend through the inner cavity of the strain gauge outer cylinder (1); A spiral groove (102) is provided on the inner wall of the outer cylinder (1) of the strain gauge; A first roller (201) is used for slidingly engaging with the spiral groove (102), wherein the first roller (201) is fixedly connected to the outer side wall of the inner cylinder (2) of the strain gauge; An inner tooth structure (202) is provided on the inner side wall of the strain gauge inner cylinder (2); a connecting rod rotatably connected to the gear sleeve (3) via a gear bearing (301), wherein the gear bearing (301) is used to mesh with the internal tooth structure (202); A spiral through groove (302) is provided on the side wall of the gear sleeve (3); a second roller (401) for slidingly engaging with the spiral through groove (302), the second roller (401) being fixedly connected to the outer side wall of the telescopic sleeve (4); A second slot is circumferentially provided on the inner side wall of the strain gauge inner cylinder (2) at one end close to the inner tooth structure (202); A pair of openings (203) are provided at the end of the strain gauge inner cylinder (2) close to the inner tooth structure (202), and the openings (203) are in communication with the second slot; The convex tooth (303) is fixedly connected to the outer side wall of the gear sleeve (3), and the convex tooth (303) can be inserted into or removed from the second slot through the opening (203).

2. A reusable full-sensing stress measurement mechanism according to claim 1, characterized in that: The stress gauge outer cylinder (1) comprises: The first sleeve has a side wall provided with the glue injection hole (103); The second sleeve is fixedly connected to the inner cavity of the first sleeve, and a glue injection cavity connected to the glue injection hole (103) is formed between the second sleeve and the first sleeve. One end of the glue injection cavity away from the glue injection hole (103) is open for inserting the stress gauge inner cylinder (2).

3. A reusable full-sensing stress measurement mechanism according to claim 2, characterized in that: A first slot (105) is provided on the inner side wall of one end of the first sleeve away from the glue injection hole (103). A sealing gasket (106) is installed in the first slot (105). The sealing gasket (106) is used to seal the open end of the glue injection cavity.

4. The reusable full-sensing stress measurement mechanism according to claim 2, characterized in that: One end of the second sleeve away from the open end of the glue injection cavity is fixedly connected to and communicated with a tapered sleeve (101), and the sensor module (5) can extend through the tapered sleeve (101).

5. The reusable full-sensing stress measurement mechanism according to claim 2, characterized in that: A pair of rubber sealing rings (107) are fixedly connected to the outer side wall of the first sleeve, and the glue injection hole (103) is located between the pair of rubber sealing rings (107).

6. A method for using a reusable full-sensing stress measurement mechanism, based on the reusable full-sensing stress measurement mechanism according to any one of claims 1 to 5, characterized in that: The following steps are involved: Assembling the strain gauge outer cylinder (1), the strain gauge inner cylinder (2), the gear sleeve (3), the telescopic sleeve (4), and the sensor module (5); Connecting the gear sleeve (3) to the thrust device and pushing it into the drill hole; When the outer cylinder (1) of the strain gauge contacts the bottom surface of the drill hole, the pushing force is increased to squeeze and release the injection liquid, and the telescopic sleeve (4) is retracted to retract the sensor module (5); The gear sleeve (3), the telescopic sleeve (4) and the sensor module (5) are taken out, and the strain gauge outer cylinder (1) and the strain gauge inner cylinder (2) are left in the drilled hole.

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