Multi-mode controlled deep well crustal stress monitoring probe

Abstract

The invention belongs to the technical field of crustal stress monitoring, and discloses a multi-mode controlled deep well crustal stress monitoring probe, which comprises a base body as a support structure of the whole crustal stress monitoring probe; the multi-mode monitoring structure comprises a guide seat, a clamping structure, a motor seat, a driving piece I, a meshing structure, a driving piece II, a thread driving structure, a plate, a guide wedge block, a piezomagnetic sensor and a wedge block seat; the clamping structure is connected with the base body through the guide seat, through the synergistic effect of the multi-mode monitoring structure, the monitoring probe can accurately complete stress monitoring at a plurality of circumferential point positions of a drill hole circular cross section, the limitation of traditional single-point monitoring is broken through, and after stress data of all the point positions are summarized and processed, the stress data of the drill hole circular cross section can be accurately monitored. The stress distribution characteristics of the circular cross-section structure of the inner wall of the deep well can be completely presented, deviation of single-point stress monitoring is avoided, and comprehensive and objective data support is provided for evaluation of real-time continuous change of the deep ground stress state.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ground stress monitoring, and particularly relates to a deep well ground stress monitoring probe with multi-mode control. BACKGROUND

[0002] In deep underground engineering (such as mine exploitation, tunnel excavation, underground gas storage construction, etc.) and fault activity scientific observation, understanding the stress state change of deep hole in-situ is crucial to the safety and stability of the engineering, and is also of great significance to the evolution law of the crustal stress field observation. At present, the traditional stress monitoring method has problems of low precision, inability to long-term real-time monitoring, etc. Some single-point monitoring methods cannot comprehensively reflect the stress distribution of the entire circular cross section, and it is difficult to accurately evaluate the stress state of the engineering structure, thereby affecting the design and construction decision of the engineering. SUMMARY

[0003] The application is proposed in view of the problems in the prior art that the traditional stress monitoring method has low precision, cannot long-term real-time monitoring, etc., and some single-point monitoring methods cannot comprehensively reflect the stress distribution of the entire circular cross section, and it is difficult to accurately evaluate the stress state of the engineering structure, thereby affecting the design and construction decision of the engineering. The following technical scheme is proposed: A deep well ground stress monitoring probe with multi-mode control comprises a base body serving as a support structure of the whole ground stress monitoring probe, and a multi-mode monitoring structure comprising a guide seat, a clamping structure, a motor seat, a driving member one, an engagement structure, a driving member two, a threaded driving structure, a plate, a guide wedge, a magnetostrictive sensor and a wedge seat. The clamping structure is connected with the base body through the guide seat, the motor seat is connected above the base body, the driving member one and the driving member two are connected through the motor seat and the base body, the driving member one is connected with the base body through the engagement structure, the driving member two is connected with the plate through the threaded driving structure, the plate is connected with the guide wedge, the guide wedge is connected with the base body through the wedge seat, and the magnetostrictive sensor is arranged inside the clamping structure. The driving member one drives the motor seat to revolve around the base body through the engagement structure, so that the driving member two completes the circumferential pose switching around the base body. The driving member two drives the plate to extrude the guide wedge through the threaded driving structure, so that the guide wedge moves vertically along the inside of the wedge seat, the clamping structure is radially expanded, the clamping structure is in contact with the object and establishes a pre-tightening force, and then abuts against the magnetostrictive sensor, so that the magnetostrictive sensor senses the stress change and converts it into an electrical signal output.

[0004] As a preferred technical scheme of the above technical scheme, the engagement structure is composed of a sun gear and a planetary gear, wherein the sun gear is connected with the base body, and the planetary gear is coaxially connected with the power output shaft of the driving member one.

[0005] As the preferred of the above technical solution, the clamping structure is combined by two groups of corrugated metal strips and two metal blocks to form a symmetrical elastic clamping unit, wherein the piezomagnetic sensor is connected between the two metal blocks, the outer sides of the two metal blocks are connected by the corrugated metal strips, and the other two corrugated metal strips are fixedly connected with the guide seat.

[0006] As the preferred of the above technical solution, the wedge block seat is internally provided with a guide groove matched with the guide wedge block, the wedge block seat is internally provided with a drainage groove, the top end opening diameter of the drainage groove is smaller than the bottom end opening diameter, forming a wedge-shaped guide cavity with narrow top and wide bottom, the bottom end diameter of the drainage groove is equal to the plate width, and the top end diameter of the drainage groove is greater than the outer diameter of the threaded driving structure.

[0007] As the preferred of the above technical solution, the guide seat is internally provided with a positioning piece, the two ends of the positioning piece are respectively connected to the guide seat and the guide wedge block, and the outer side of the plate and the inner wall of the guide wedge block are mutually attached.

[0008] As the preferred of the above technical solution, the motor seat is provided with a threaded sleeve at the top end, the outer side of the threaded sleeve is connected with a concave sleeve, the inner wall of the concave sleeve is provided with a limiting block slidingly connected in the base, the limiting block is rectangular in shape, and the top end of the base is provided with a pressure sensor.

[0009] As the preferred of the above technical solution, the base is internally provided with a top plate, the bottom end of the top plate is provided with a magnetic piece one, the bottom end of the magnetic piece one is provided with a magnetic piece two, the outer side of the magnetic piece two is provided with a clamping block, and the clamping block is slidingly connected in the base.

[0010] As the preferred of the above technical solution, the top end of the motor seat is provided with a clamping groove combined by an annular groove, a radial limiting protrusion and a positioning hole, the shape of the bottom end of the clamping block and the shape of the positioning hole are both triangular, and the radial limiting protrusion is used for blocking the clamping block.

[0011] As the preferred of the above technical solution, the contraction distance between the clamping structure and the axis of the base is smaller than the distance between the maximum outer diameter of the base and the axis, and the stretching distance between the clamping structure and the axis of the base is greater than the distance between the maximum outer diameter of the base and the axis.

[0012] The beneficial effects of the present application are: (1) Through the synergistic effect of the multi-mode monitoring structure, the stress monitoring of the monitoring probe can be accurately completed at multiple circumferential points of the drilling circular section, breaking through the limitation of traditional single-point monitoring, and after the stress data of each point is collected and processed, the stress distribution characteristics of the circular section structure such as the inner wall of the deep well can be completely presented, avoiding the deviation of single-point stress monitoring, and providing comprehensive and objective data support for the evaluation of the real-time and continuous change of the deep geostress state; (2) Real-time monitoring of the motor base rotation amplitude by the pressure sensor, combined with the magnetic repulsion driven clamping block limiting structure, forming a double protection mechanism: not only avoiding the risk of cable winding caused by the continuous unidirectional rotation of the driving part, but also precisely controlling the motor base revolution range through 330° forward limiting and 15° reverse limiting, ensuring the safety and operation controllability of the equipment in complex deep well environment, prolonging the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A structural schematic diagram of a multi-mode controlled deep well ground stress monitoring probe in Example 1 is shown. Figure 2 A sectional view of a multi-mode controlled deep well ground stress monitoring probe in Example 1 is shown. Figure 3 A sectional view of the base in Example 1 is shown. Figure 4 A schematic diagram of the installation structure of the positioning member in Example 1 is shown. Figure 5 A schematic diagram of the installation structure of the guide wedge in Example 1 is shown. Figure 6 A schematic diagram of the installation structure of the threaded sleeve in Example 1 is shown. Figure 7 A sectional view of the clamping block in Example 1 is shown. Figure 8 A schematic diagram of the installation structure of the guide wedge in Example 1 is shown. Figure 9 A schematic diagram of the installation structure of a multi-mode controlled deep well ground stress monitoring probe in Example 1 is shown.

[0014] In the figure: 1, base; 2, guide seat; 3, clamping structure; 4, motor base; 5, driving part one; 6, meshing structure; 7, driving part two; 8, threaded driving structure; 9, plate; 10, guide wedge; 11, piezomagnetic sensor; 12, positioning member; 13, wedge seat; 14, clamping block; 15, threaded sleeve; 16, concave sleeve; 17, limiting block; 18, pressure sensor; 19, top plate; 20, magnetic part one; 21, magnetic part two; 22, clamping groove. DETAILED DESCRIPTION

[0015] To make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution of the present application will be described clearly and completely below in conjunction with the embodiments.

[0016] Example 1 The present application provides a multi-mode controlled deep well ground stress monitoring probe, as Figures 1 to 9As shown, it comprises: a base body 1 and a multi-mode monitoring structure; the base body 1 is a supporting structure of the whole ground stress monitoring probe; the multi-mode monitoring structure comprises: a guide seat 2, a clamping structure 3, a motor seat 4, a driving part one 5, an engagement structure 6, a driving part two 7, a threaded driving structure 8, a plate 9, a guide wedge 10, a magnetostrictive sensor 11 and a wedge seat 13; the clamping structure 3 is connected with the base body 1 through the guide seat 2, the motor seat 4 is connected above the base body 1, the driving part one 5 and the driving part two 7 are connected through the motor seat 4 and the base body 1, the driving part one 5 is connected through the engagement structure 6 and the base body 1, the driving part two 7 is connected through the threaded driving structure 8 and the plate 9, the plate 9 and the guide wedge 10 are connected, the guide wedge 10 is connected through the wedge seat 13 and the base body 1, and the magnetostrictive sensor 11 is arranged inside the clamping structure 3; the driving part one 5 drives the motor seat 4 to revolve around the base body 1 through the engagement structure 6, so that the driving part two 7 completes the circumferential pose switching around the base body 1, and the driving part two 7 drives the plate 9 to extrude the guide wedge 10 through the threaded driving structure 8, so that the guide wedge 10 moves vertically along the inside of the wedge seat 13 (the position of the top outside of the guide wedge 10 close to the clamping structure 3 is an inclined surface, and the two surfaces of the guide wedge 10 located inside the wedge seat 13 are vertical surfaces, Figure 8 The driving clamping structure 3 is radially expanded, so that the clamping structure 3 is first radially expanded to contact the well wall to establish a pre-tightening force, then shrinks to the base body 1 direction under pressure, and then abuts against and compresses the magnetostrictive sensor 11, so that the magnetostrictive sensor 11 senses the stress change and converts it into an electrical signal output.

[0017] The existing single-point monitoring method cannot fully reflect the stress distribution of the whole circular cross section, and it is difficult to accurately evaluate the stress state of the engineering structure, thereby affecting the design and construction decision of the project; Therefore, a multi-mode monitoring structure is designed, the magnetostrictive sensor 11 can complete stress monitoring at multiple circumferential points of the drilling circular cross section, and after the stress data of each point are collected and processed, the stress distribution characteristics of the whole circular cross section can be completely presented, the deviation of single-point stress monitoring is avoided, comprehensive and objective data support is provided for the evaluation of the real-time and continuous change of the deep ground stress state, the scientificity of the engineering design and construction decision is ensured, and through the action of the multi-mode monitoring structure, the ground stress magnetostrictive sensor 11 can realize multi-point stress monitoring of different directions of the circular cross section, so as to fully reflect the stress distribution of the whole circular cross section.

[0018] In use, the base body 1 and the inner wall of the deep well are installed, and then the driving part two 7 is started, the driving part two 7 drives the threaded driving structure 8 to rotate when it operates, the threaded driving structure 8 drives the plate 9 to move inside the guide wedge 10 through the thread when it rotates, so as to drive the guide wedge 10 to move downward along the inside of the wedge seat 13, the guide wedge 10 moves downward through the inclined surface Figure 8The driving member 7 drives the clamping structure 3 to move towards the inner wall of the deep well, so that the clamping structure 3 is in contact with the corresponding point of the inner wall of the deep well and a stable pre-tightening force is established, then the clamping structure 3 compresses against the magnetostrictive sensor 11, so that the magnetostrictive sensor 11 can accurately perceive the stress change of the point and convert it into an electrical signal output; Then, the driving member two 7 is started, and the driving member two 7 drives the plate 9 to reset through the threaded driving structure 8 when running, and then the driving member one 5 is started, and the driving member one 5 drives the meshing structure 6 to run when running, so that the motor base 4 rotates outside the base body 1, at this time, the driving member two 7, the threaded driving structure 8 and the plate 9 enter above the second guide wedge block 10, and then the driving member two 7 is repeatedly run, at this time, the driving member two 7 moves the second guide wedge block 10 downwards according to the above process, and at this time, the stress of the second point of the inner wall of the deep well is measured through the clamping structure 3 and the magnetostrictive sensor 11.

[0019] Specifically, a guide seat 2 (specifically a circular ring) is fixedly installed on the outside of the base 1, and the guide seat 2 coincides with the axis of the base 1. A clamping structure 3 is fixedly installed on the outside of the guide seat 2 (the number of clamping structures 3 is set to eight and arranged in a circle with the axis of the base 1). The clamping structure 3 is composed of two groups of corrugated metal strips and two metal blocks to form a symmetrical elastic clamping unit, wherein a piezomagnetic sensor 11 is clamped and installed between the two metal blocks. The outsides of the two metal blocks are connected by a corrugated metal strip, and the elastic deformation of the corrugated metal strip is used to absorb the displacement compensation during the loading process. The outside of the metal block is fixedly connected to the guide seat 2 through another two corrugated metal strips. The top of the outer side of the base 1 The motor base 4 is rotatably connected, and a driving member 5 is installed on the top of the motor base 4 by screws. The output shaft of the driving member 5 is connected to a meshing structure 6. The meshing structure 6 is composed of a sun gear and a planetary gear. The sun gear is connected to the base 1 by a key to form a fixed central gear of the revolution trajectory. The planetary gear is coaxial with the power output shaft of the driving member 5 and is connected by a key. As a planetary gear, it participates in the meshing transmission. The principle of planetary gear transmission is used to convert the rotational motion of the driving member 5 into the revolution motion of the motor base 4. One side of the top of the motor base 4 is connected to the driving member 2 7 by a thread. The bottom end of the driving member 2 7 is connected to a threaded drive structure 8 (specifically a threaded rod) by a key. The base 1 is fixedly mounted with a wedge seat 13 on the outside, and a plurality of guide wedges 10 are slidably connected inside the wedge seat 13, wherein a plate 9 is vertically movably connected inside one of the guide wedges 10, and an internal threaded hole is provided in the center of the plate 9, which is engaged with the threaded drive structure 8 by a thread, and a vertical guide groove is provided inside the wedge seat 13, which cooperates with the vertical surfaces on both sides of the guide wedge 10 to limit it to vertical movement only, and a drainage groove is provided inside the wedge seat 13, and the diameter of the drainage groove is equal to the width of the plate 9, so that the plate 9 rotates circumferentially around the center of the wedge seat 13 inside the drainage groove, and the diameter of the drainage groove is larger than the outer diameter of the threaded drive structure 8, which is used for the threaded drive structure 8 to rotate around the wedge seat 1 inside the drainage groove. 3 rotates circumferentially, and the contraction distance between the clamping structure 3 and the axis of the base 1 is smaller than the distance between the maximum outer diameter of the base 1 and the axis (when the clamping structure 3 is in the contracted state (not squeezed), the distance between its outermost point and the axis of the base 1 (the contraction radius) is smaller than the maximum radius of the base 1), and the stretching distance between the clamping structure 3 and the axis of the base 1 is larger than the distance between the maximum outer diameter of the base 1 and the axis (when the clamping structure 3 is in the expanded state (pressed by the guide wedge 10), the distance between its outermost point and the axis of the base 1 (the expansion radius) is larger than the maximum radius of the base 1), so that the clamping structure 3 can move outward and contact the inner wall of the deep well.

[0020] like Figure 2 、 Figure 3 and Figure 8As the plate 9 drives the guide wedge 10 to move downward, the guide wedge 10 is not convenient to reset after moving downward, therefore, the positioning member 12 is installed inside the guide seat 2, both ends of the positioning member 12 are connected to the guide seat 2 and the guide wedge 10 respectively (as shown in Figure 3 The outer side of the plate 9 and the inner wall of the guide wedge 10 are mutually attached.

[0021] In use, as the plate 9 drives the guide wedge 10 to move downward, the guide wedge 10 extrudes the positioning member 12 when moving downward, so that the positioning member 12 shrinks, and when the plate 9 rises, the plate 9 drives the guide wedge 10 to rise, the guide wedge 10 drives the positioning member 12 to stretch when rising.

[0022] Specifically, the positioning member 12 (specifically a telescopic rod, composed of a positioning sleeve and a movable sleeve, wherein the movable sleeve is connected to the inside of the positioning sleeve through friction sliding) is installed inside the guide seat 2, a circular hole is formed in the inside of the guide seat 2 corresponding to the bottom end of the positioning member 12, the positioning member 12 is located inside the circular hole, both ends of the positioning member 12 are connected to the guide seat 2 and the guide wedge 10 respectively, the outer side of the plate 9 and the inner wall of the guide wedge 10 are mutually attached, for limiting the plate 9, preventing the plate 9 from swinging inside the inner wall of the guide wedge 10.

[0023] As shown in Figure 2 And Figure 3 As the driving member one 5 can drive the motor seat 4 to rotate through the meshing structure 6 when running, the driving member one 5 needs to be warned after rotating to prevent the driving member one 5 from winding the connecting line of the power supply by rotating in one direction all the time, therefore, the threaded sleeve 15 is arranged at the top end of the motor seat 4, the concave sleeve 16 is connected to the outer side of the threaded sleeve 15, the limiting block 17 which is slidably connected to the inside of the base body 1 is arranged on the inner wall of the concave sleeve 16, the limiting block 17 is rectangular in shape, and the pressure sensor 18 is arranged at the top end of the base body 1.

[0024] The motor seat 4 drives the threaded sleeve 15 to rotate synchronously, as the concave sleeve 16 is connected to the base body 1 through the limiting block 17 (the limiting block 17 restricts the concave sleeve 16 from rotating), the rotation of the threaded sleeve 15 will force the concave sleeve 16 which is threadedly engaged with the threaded sleeve 15 to move downward in the axial direction (vertical direction), the concave sleeve 16 drives the limiting block 17 to slide downward along the rectangular hole in the inside of the base body 1 when moving downward, the limiting block 17 extrudes the pressure sensor 18 when descending, and the pressure sensor 18 changes the value under the action of the extrusion force, the value transmitted by the pressure sensor 18 monitors the descending depth of the limiting block 17, thereby indirectly monitoring the rotation amplitude of the threaded sleeve 15, and further indirectly monitoring the rotation amplitude of the motor seat 4.

[0025] Specifically, the top end of the motor seat 4 is fixedly installed with a threaded sleeve 15 at the position outside the base body 1, the outer side of the threaded sleeve 15 is threadedly connected with a concave sleeve 16, the inner wall of the concave sleeve 16 is fixedly connected with a limiting block 17 which is slidingly connected inside the base body 1, the limiting block 17 is rectangular in shape, the top end of the base body 1 is provided with a rectangular hole corresponding to the bottom end position of the limiting block 17, the limiting block 17 is slidingly connected inside the base body 1 through the rectangular hole, and the top end of the base body 1 is clampingly installed with a pressure sensor 18 at the position of the bottom end of the limiting block 17 (the end of the running track of the limiting block 17).

[0026] As shown in Figure 6 order to facilitate physical limiting after the rotation of the motor seat 4, so that the motor seat 4 can only be rotated to a certain amplitude (the maximum forward rotation of the motor seat 4 is 330°, and the maximum reverse rotation is 15°), the base body 1 is provided with a top plate 19, the bottom end of the top plate 19 is provided with a magnetic member one 20, the bottom end of the magnetic member one 20 is provided with a magnetic member two 21, the outer side of the magnetic member two 21 is provided with a clamping block 14 which is slidingly connected inside the base body 1, the top end of the motor seat 4 is provided with a clamping groove 22 which is composed of an annular groove, a radial limiting protrusion and a positioning hole, the shape of the bottom end of the clamping block 14 and the shape of the positioning hole are both trapezoidal, and the radial limiting protrusion is used for blocking the clamping block 14.

[0027] In use, due to the repulsive force between the magnetic member two 21 and the magnetic member one 20, the bottom end of the clamping block 14 is always inside the annular track, and when the motor seat 4 rotates forward, the clamping block 14 is displaced along the inside of the annular groove, and when it enters above the positioning hole, at this time the magnetic member two 21 is driven to move downward under the action of the magnetic member one 20 at the bottom end of the top plate 19, the magnetic member two 21 moves downward, bringing the clamping block 14 into the inside of the positioning hole, at this time the vertical surface between the bottom end of the clamping block 14 and the positioning hole abuts against each other, so that the clamping block 14 cannot continue to rotate; When the motor seat 4 rotates reversely, at this time the clamping block 14 is driven to rise through the inclined surface between the clamping block 14 and the positioning hole when the motor seat 4 rotates, the clamping block 14 rises, bringing the magnetic member two 21 to rise, so that the distance between the magnetic member two 21 and the magnetic member one 20 is shortened, thereby increasing the repulsive force between the magnetic member one 20 and the magnetic member two 21, and continuing to rotate, when the vertical surface above the inclined surface of the clamping block 14 contacts the radial limiting protrusion, at this time the clamping block 14 is limited, thereby limiting the rotation amplitude of the motor seat 4.

[0028] Specifically, the base body 1 is internally fixedly installed with a top plate 19, the bottom end of the top plate 19 is embeddedly installed with a magnetic piece one 20, the base body 1 is internally and below the top plate 19 slidingly connected with a clamping block 14, the clamping block 14 is internally clampingly installed with a magnetic piece two 21 (the magnetic piece two 21 and the magnetic piece one 20 are both magnets, and the opposite magnetic poles of the two are the same (i.e. both N poles or both S poles)), the top end of the motor seat 4 is provided with a clamping groove 22, the clamping groove 22 is composed of an annular groove, a radial limiting protrusion and a positioning hole, the shape of the bottom end of the clamping block 14 and the shape of the positioning hole are both trapezoidal, and the size of the positioning hole is larger than the size of the bottom end of the clamping block 14, and the radial limiting protrusion is used for blocking the clamping block 14, so that the rotation amplitude of the clamping block 14 is limited, thereby the rotation amplitude of the motor seat 4 is limited.

[0029] Working principle: in the actual use process, the monitoring probe is fixed on the inner wall of the deep well, the whole probe is stable, then the driving piece two 7 is started, the threaded driving structure 8 is rotated, the threaded driving structure 8 drives the plate 9 to move downward in the guide wedge block 10, the guide wedge block 10 slides downward along the vertical guide groove of the wedge block seat 13, the inclined surface of the guide wedge block 10 extrudes the clamping structure 3, forces it to radially expand and contact the well wall, and establishes the pre-tightening force, the well wall reaction force makes the clamping structure 3 shrink towards the base body 1, compresses the piezomagnetic sensor 11, the piezomagnetic sensor 11 senses the stress change and outputs an electric signal, and completes the current point measurement, in the process, the guide wedge block 10 drives the positioning piece 12 to compress when moving downward, and the position of the guide wedge block 10 is fixed through the self-locking performance of the positioning piece 12; Then, the driving piece two 7 is reversely rotated, the threaded driving structure 8 drives the plate 9 to move upward and reset, at this time, the plate 9 is reset, then the self-rotation of the driving piece one 5 is converted into the revolution of the motor seat 4 through the meshing structure 6 (sun gear-planet wheel system), the motor seat 4 drives the driving piece two 7, the threaded driving structure 8 and the plate 9 to revolve, moves to the upper side of the next guide wedge block 10, and repeats starting the driving piece two 7, driving the threaded driving structure 8 to rotate, the threaded driving structure 8 drives the plate 9 to move downward in the guide wedge block 10, drives the next guide wedge block 10 to slide downward along the vertical guide groove of the wedge block seat 13, the inclined surface of the next guide wedge block 10 extrudes the clamping structure 3, forces it to radially expand and contact the well wall, and establishes the pre-tightening force, the well wall reaction force makes the clamping structure 3 shrink towards the base body 1, compresses the piezomagnetic sensor 11, the piezomagnetic sensor 11 senses the stress change and outputs an electric signal, and executes the stress measurement of the new point, after all the guide wedge blocks 10 move downward, the circular cross-section multi-directional stress data collection is completed; Then, the above mode is continuously run, so that all the guide wedge blocks 10 continue to move downward again, so that all the guide wedge blocks 10 enter the second predetermined position, and the different data collection of the circular cross-section multi-directional stress is completed; When the data collected by one of the magnetostrictive sensors 11 is different, the above driving principle is used to make the second driving part 7 enter above the magnetostrictive sensor 11, and then the second driving part 7 pushes the guide wedge 10 to continue to move downward through the plate 9, so that the data transmitted by the magnetostrictive sensor 11 is the same as the data transmitted by all the other magnetostrictive sensors 11; Finally, the second driving part 7 drives the plate 9 to move upward through the threaded driving structure 8, and the plate 9 drives the guide wedge 10 to move upward when moving upward, and the guide wedge 10 drives the positioning part 12 to stretch when moving upward, and then the first driving part 5 is started after the guide wedge 10 is reset, at this time, the threaded driving structure 8 drives the plate 9 to move downward to reset, at this time, the plate 9 is reset, and then the rotation of the first driving part 5 is converted into the revolution of the motor base 4 through the meshing structure 6 (sun gear-planet wheel system), the motor base 4 drives the second driving part 7, the threaded driving structure 8 and the plate 9 to revolve, moves to above the next guide wedge 10, and continues the above steps to reset the second guide wedge 10, and then all the guide wedges 10 are reset in sequence, and finally the guide wedges 10 are completely reset; In the above process, when the motor base 4 revolves, the threaded sleeve 15 rotates synchronously, forcing the concave sleeve 16 to move downward along the limiting block 17, the limiting block 17 extrudes the bottom pressure sensor 18, and the rotation angle is converted through the pressure value to prevent the cable from winding, at the same time, when rotating forward to the positioning hole, the clamping block 14 enters the positioning hole by the mutual repulsive force of the magnetic part two 21 and the magnetic part one 20, and the trapezoidal vertical surface is locked (maximum 330°), when rotating reversely, the positioning hole inclined surface lifts the clamping block 14, so that the distance between the magnetic part two 21 and the magnetic part one 20 is shortened, thereby increasing the repulsive force between the magnetic part two 21 and the magnetic part one 20, and the clamping block 14 cannot be continuously extruded after entering the annular groove, at this time, under the action of the repulsive force between the magnetic part two 21 and the magnetic part one 20, the bottom end surface of the clamping block 14 continuously adheres to the annular groove and moves along the circumferential direction inside the annular groove, and when the clamping block 14 contacts the radial limiting protrusion, it is forced to stop (maximum 15°).

[0030] The above examples are only used to illustrate the technical solutions of the present application, but not limit it.

Claims

1. A multi-mode controlled deep well ground stress monitoring probe, characterized in that: include: A base (1) serving as a supporting structure for the entire ground stress monitoring probe; The multi-mode monitoring structure comprises: a guide seat (2), a clamping structure (3), a motor seat (4), a driving member 1 (5), an engagement structure (6), a driving member 2 (7), a threaded driving structure (8), a plate (9), a guide wedge (10), a piezomagnetic sensor (11) and a wedge seat (13); the clamping structure (3) is connected to the base (1) through the guide seat (2), the motor seat (4) is connected above the base (1), the driving member 1 (5) and the driving member 2 (7) are connected to the base (1) through the motor seat (4), the driving member 1 (5) is connected to the base (1) through the engagement structure (6), the driving member 2 (7) is connected to the plate (9) through the threaded driving structure (8), and the plate (9) and the guide seat (13) are connected. The wedge block (10) is connected, the guide wedge block (10) is connected to the base (1) through the wedge block seat (13), and the pressure magnetic sensor (11) is arranged inside the clamping structure (3); the driving member 1 (5) drives the motor seat (4) to revolve around the base (1) through the meshing structure (6), so that the driving member 2 (7) completes the circumferential posture switching around the base (1), and the driving member 2 (7) squeezes the guide wedge block (10) through the threaded driving structure (8) driving plate (9), so that the guide wedge block (10) moves vertically along the inside of the wedge block seat (13), driving the clamping structure (3) to expand radially, so that the clamping structure (3) contacts the object and establishes a pre-tightening force and then abuts against the pressure magnetic sensor (11), so that the pressure magnetic sensor (11) senses the stress change and converts it into an electrical signal output.

2. The multi-mode controlled deep well ground stress monitoring probe according to claim 1, characterized in that: The meshing structure (6) is composed of a sun gear and a planetary gear, wherein the sun gear is connected to the base body (1), and the planetary gear is coaxially connected to the power output shaft of the driving member (5).

3. The multi-mode controlled deep well ground stress monitoring probe according to claim 1, characterized in that: The clamping structure (3) is composed of two groups of corrugated metal strips and two metal blocks to form a symmetrical elastic clamping unit, wherein the piezomagnetic sensor (11) is clamped between the two metal blocks, the outer sides of the two metal blocks are connected by the corrugated metal strips, and the other two corrugated metal strips are fixedly connected to the guide seat (2).

4. The multi-mode controlled deep well ground stress monitoring probe according to claim 2, characterized in that: A guide groove that fits the guide wedge (10) is provided inside the wedge seat (13), and a drainage groove is provided inside the wedge seat (13). The top opening diameter of the drainage groove is smaller than the bottom opening diameter, forming a wedge-shaped guide cavity that is narrow at the top and wide at the bottom. The bottom diameter of the drainage groove is equal to the width of the plate (9), and the top diameter of the drainage groove is larger than the outer diameter of the threaded drive structure (8).

5. The multi-mode controlled deep well ground stress monitoring probe according to claim 2, characterized in that: A positioning member (12) is installed inside the guide seat (2), and two ends of the positioning member (12) are respectively connected to the guide seat (2) and the guide wedge (10), and the outer side of the plate (9) and the inner wall of the guide wedge (10) are in contact with each other.

6. The multi-mode controlled deep well ground stress monitoring probe according to claim 2, characterized in that: A threaded sleeve (15) is provided at the top of the motor base (4), a concave sleeve (16) is connected to the outside of the threaded sleeve (15), a limit block (17) is provided on the inner wall of the concave sleeve (16) and is slidably connected to the inside of the base (1), and the limit block (17) is rectangular in shape. A pressure sensor (18) is provided at the top of the base (1).

7. The multi-mode controlled deep well ground stress monitoring probe according to claim 2, characterized in that: A top plate (19) is provided inside the base (1), a magnetic part 1 (20) is provided at the bottom end of the top plate (19), a magnetic part 2 (21) is provided at the bottom end of the magnetic part 1 (20), a clamping block (14) is provided on the outside of the magnetic part 2 (21), and the clamping block (14) is slidably connected to the inside of the base (1).

8. The multi-mode controlled deep well ground stress monitoring probe according to claim 7, characterized in that: The top of the motor seat (4) is provided with a snap-fit ​​groove (22), which is composed of an annular groove, a radial limiting protrusion and a positioning hole. The shape of the bottom end of the clamping block (14) is the same as that of the positioning hole, both of which are triangular. The radial limiting protrusion is used to block the clamping block (14).

9. The multi-mode controlled deep well ground stress monitoring probe according to claim 2, characterized in that: The contraction distance between the clamping structure (3) and the axis of the base (1) is smaller than the distance between the maximum outer diameter of the base (1) and the axis, and the stretching distance between the clamping structure (3) and the axis of the base (1) is larger than the distance between the maximum outer diameter of the base (1) and the axis.

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