A drilling stress gauge with self-pressure compensation function

Abstract

This application relates to a borehole stress gauge with a self-compensating pressure function, belonging to the technical field of stress monitoring. The gauge comprises an oil-filled naan, an oil pipe connected to one end of the naan, a measuring assembly connected to one end of the oil pipe away from the naan, and a liquid supply mechanism connected to the oil pipe on one side of the measuring assembly. This gauge facilitates the filling of hydraulic oil into the oil-filled naan of the borehole stress gauge.

Description

Technical Field

[0001] The present application relates to the technical field of stress monitoring, and in particular to a drilling stress gauge with a self-pressure compensation function. Background Art

[0002] A borehole stress gauge is a tool used to measure formation stress. The instrument is usually installed underground by drilling a hole. It indirectly measures the isotropic stress and principal stress direction of the formation by measuring the strain generated by the deformation of the rock core or rock and soil in the formation. It is widely used in geological exploration, petroleum exploration, rock and soil mechanics and other fields.

[0003] The borehole stress gauges currently used are mainly of the structure of a pressure gauge with oil filling, which requires the canning operation of hydraulic oil during on-site installation. This method requires the preparation and carrying of more installation tools and other items during on-site operation. The on-site injection of hydraulic oil may also cause certain pollution to the on-site environment due to improper operation. In addition, the installation environment and space in places such as mines will be subject to certain restrictions, and the operation process will be subject to space limitations. There are also some imported types of instruments that use a pressure-bearing steel body structure with stress and strain sensor measurement product form. The installation of this product is also affected by the hole depth and installation environment, and it is relatively expensive and the product cost is high. Summary of the Invention

[0004] In order to facilitate the injection of hydraulic oil into the oil chamber of a borehole stress gauge, the present application provides a borehole stress gauge with a self-pressure replenishing function.

[0005] The present application provides a borehole stress gauge with a self-compensating pressure function, which adopts the following technical solution:

[0006] A borehole stress gauge with a self-pressure compensation function includes an oil naan, the end of which is connected to an oil pipe, the end of the oil pipe away from the oil naan is connected to a measuring component, one side of the measuring component is connected to a liquid supply mechanism, and the liquid supply mechanism is connected to the oil pipe.

[0007] By adopting the above technical solution and setting up a liquid supply mechanism, real-time liquid supply operation can be achieved inside the oil naan at the construction site, thereby reducing the phenomenon that the hydraulic oil tanks and installation tools at the construction site are difficult to carry, resulting in untimely replenishment of the hydraulic oil inside the oil naan, which in turn affects the process of monitoring the internal stress of the hole.

[0008] Optionally, the liquid supply mechanism includes a boosting pipe, which has a cavity inside and is open at both ends. The opening at one end of the boosting pipe is set as a liquid outlet, and the liquid outlet is connected to a connecting pipe. The connecting pipe is connected to the measuring component and the oil pipe. An extrusion plate is provided inside the boosting pipe, and the side wall of the extrusion plate is in sliding contact with the adjacent inner wall of the boosting pipe. The boosting pipe is connected to the opening at one end away from the connecting pipe with a pipe cover for sealing the end opening of the boosting pipe.

[0009] By adopting the above technical solution, when it is necessary to replenish hydraulic oil into the oil naan, the extrusion plate is moved. During the movement, the extrusion plate drives the hydraulic oil inside the boosting pipe to flow from the liquid outlet into the connecting pipe. Since the connecting pipe is connected to the oil pipe, the hydraulic oil inside the connecting pipe can flow from the oil pipe into the oil naan, thereby realizing the process of replenishing the hydraulic oil inside the oil naan.

[0010] Optionally, the tube cover is penetrated and threadedly connected with a threaded push rod, and one end of the threaded push rod penetrates into the interior of the boost tube and abuts against the extrusion plate.

[0011] By adopting the above technical solution, by setting a threaded push rod to abut against the extrusion plate, the staff can drive the extrusion plate to move by rotating the threaded push rod, and because the threaded push rod is threadedly connected to the push rod, the position of the extrusion plate can also be restricted by the self-locking effect of the thread, thereby reducing the phenomenon of air being mixed into the hydraulic oil inside the oil naan and affecting the detection effect.

[0012] Optionally, the pipe cover is threadedly connected to the boost pipe.

[0013] By adopting the above technical solution, by arranging the pipe cover and the boost pipe to be threadedly connected, it is convenient for the staff to open the pipe cover and inject hydraulic oil into the boost pipe.

[0014] Optionally, a flow limiting member is provided at the liquid outlet of the boosting pipe, and the flow limiting member is used to limit the hydraulic oil in the connecting pipe from flowing into the boosting pipe.

[0015] By adopting the above technical solution and setting a flow limiting component, the hydraulic oil inside the oil pan can be reduced from entering the boost pipe through the connecting pipe during the test, thereby affecting the measurement results.

[0016] Optionally, the measuring component includes an outer cylinder, one end of which is connected to the connecting tube and the oil pipe, and a pressure core is provided at one end of the oil pipe close to the connecting tube, and the pressure core is fixedly connected to the inner wall of the outer cylinder, and the side of the pressure core away from the connecting tube is electrically connected to a splitter, and the splitter is electrically connected to a cable, and a rear plug is connected between the outer cylinder and the cable.

[0017] By adopting the above technical solution, when the hydraulic oil enters the outer cylinder and is located on one side of the pressure core, the pressure core monitors the change in hydraulic oil pressure and transmits the monitoring result to the cable through the splitter, and then transmits the result to the external connected monitoring equipment through the cable, thereby realizing the monitoring process of the internal stress of the hole.

[0018] Optionally, the end of the outer cylinder away from the rear plug is fixedly connected to a connector, the connecting pipe and the oil pipe pass through the connector and are fixedly connected to the connector, and a sealing copper gasket is fixedly connected between the connector and the outer cylinder.

[0019] By adopting the above technical solution, by providing a connector and a sealing copper gasket, the dust is reduced from entering the position between the connector inside the outer cylinder and the pressure core, thereby reducing the occurrence of the phenomenon of affecting the monitoring results.

[0020] Optionally, the flow limiting member is configured as a one-way valve.

[0021] By adopting the above technical solution and setting a one-way valve, on the one hand, the hydraulic oil can pass through the one-way valve and flow into the oil pan, and on the other hand, the hydraulic oil inside the connecting pipe is difficult to flow into the boost pipe.

[0022] Optionally, the flow limiting member is configured as a blocking block located at the liquid outlet and abutting against the side wall of the liquid outlet, and the blocking block is connected to a driving assembly, which is connected to the threaded push rod and can drive the blocking block to move during the rotation of the threaded push rod to open the liquid outlet.

[0023] By adopting the above technical solution, when the threaded push rod rotates to drive the extrusion plate to move, and then the extrusion plate drives the hydraulic oil inside the boost pipe to flow into the connecting pipe, the threaded push rod drives the blocking block to move through the driving assembly, thereby opening the liquid outlet, and then the hydraulic oil inside the boost pipe can pass through the liquid outlet and flow into the connecting pipe.

[0024] The transmission gear of the present invention is a gear which is connected with the drive gear of the driving member to the gear of the driving member, and the gear is connected with the transmission gear of the driving member to the gear of the driving member. The driving member is a chain which has a first end fixed to the side panel that is located close to the first gear and a second end of the driving member is engaged with the first and second gears and is then connected with the drive member to a location that is located close to the first gear and is then connected with the drive member to a location where the driving member is in contact with the drive member.

[0025] By adopting the above technical solution, the active bevel gear is driven to rotate during the rotation of the threaded push rod, and the active bevel gear drives the driven bevel gear to rotate, and the driven bevel gear drives the active pulley, the connecting belt, the driven pulley and the driving pulley to rotate. During the rotation of the driving pulley, the movable plate and the driving collar are driven to move and realize the engagement between the driving collar and the driven pulley. At the same time, the driven pulley drives the driving collar and the driving collar to rotate during the rotation, and then drives the driving screw and the blocking block to move, thereby realizing the opening of the liquid outlet, so that the hydraulic oil inside the boosting pipe can flow out of the boosting pipe; when the threaded push rod is stationary, the tension spring drives the blocking block to move to the middle position of the liquid outlet, thereby realizing the blocking of the liquid outlet.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting up the liquid supply component, the hydraulic oil inside the oil naan can be replenished in real time, thereby facilitating the process of replenishing the hydraulic oil inside the oil naan;

[0028] 2. By setting up the outer cylinder, connector, bottom plug and sealing copper pad, the pressure core can be fully protected, making the monitoring results more accurate;

[0029] 3. By setting a one-way valve or limit block and a drive component, the hydraulic oil flowing from the inside of the connecting pipe to the boost pipe can be blocked, thereby reducing the occurrence of the phenomenon that the hydraulic oil inside the oil tank flows into the boost pipe and affects the monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0031] Figure 2 This is a cross-sectional view of the overall structure of Example 1 of the present application.

[0032] Figure 3 yes Figure 2 A partial enlarged schematic diagram of the structure A in the middle.

[0033] Figure 4 This is a cross-sectional view of the overall structure of Example 2 of the present application.

[0034] Figure 5 yes Figure 4 A partial enlarged schematic diagram of the structure B in the middle.

[0035] Figure 6 yes Figure 4 A partial enlarged schematic diagram of the C structure in the middle.

[0036] Explanation of the accompanying symbols: 1. oil pan; 11. oil pipe; 2. liquid supply mechanism; 21. boost pipe; 211. liquid outlet; 22. connecting pipe; 23. extrusion plate; 24. pipe cover; 25. threaded push rod; 251. clamping groove; 26. flow limiting member; 261. one-way valve; 262. blocking block; 27. driving assembly; 271. flow limiting cylinder; 272. driving bevel gear; 2721. clamping tooth; 273. driven bevel gear; 2731. connecting shaft; 274. driving pulley; 275. Driven pulley; 2751, driving tooth; 2752, connecting belt; 2753, driving pulley; 2754, moving screw; 276, moving plate; 2761, moving block; 277, driving ring; 2771, driving collar; 2772, driven tooth; 278, driving screw; 279, tension spring; 3, measuring component; 31, outer cylinder; 32, pressure movement; 33, distributor; 34, cable; 35, connector; 36, sealing copper gasket; 37, rear plug. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 -Attached Figure 6 This application is described in further detail.

[0038] The embodiment of the present application discloses a drilling stress gauge with a self-pressure compensation function.

[0039] Example 1

[0040] Reference Figure 1 A borehole stress gauge with a self-compensating pressure function includes an oil naan 1, one end of which is connected to an oil pipe 11. The end of the oil pipe 11 away from the oil naan 1 is connected to a measuring component 3, which is connected to a liquid supply mechanism 2, and the liquid supply mechanism 2 is also connected to the oil pipe 11.

[0041] By providing the liquid supply mechanism 2 , hydraulic oil can be injected into the oil-fried naan 1 during use through the liquid supply mechanism 2 , thereby facilitating the process of injecting hydraulic oil into the oil-fried naan 1 at the construction site.

[0042] Reference Figure 2 and Figure 3 The liquid supply mechanism 2 includes a boosting tube 21. The boosting tube 21 is hollow and has openings at both ends that connect the internal cavity of the boosting tube 21 to the outside world. One of the openings of the boosting tube 21 is provided as a liquid outlet 211. A connecting tube 22 is fixedly connected to the side wall of the boosting tube 21 at the liquid outlet 211, and the connecting tube 22 is connected to the internal cavity of the boosting tube 21. The boosting tube 21 is also provided with an extrusion plate 23. The outer wall of the extrusion plate 23 slides against the inner wall of the boosting tube 21 along the length of the boosting tube 21.

[0043] A cap 24 is installed at the opening of the boost pipe 21 at the end away from the connecting pipe 22. This cap 24 is threadedly connected to the sidewall of the port at this end of the boost pipe 21, sealing the opening. A threaded push rod 25 is threadedly connected to the middle of the cap 24, perpendicular to the sidewall of the cap 24 to which it is attached. The push rod 25 extends through the interior of the boost pipe 21 and abuts against the extrusion plate 23 inside the pipe 21.

[0044] A flow limiting member 26 is provided at the liquid outlet 211 of the boosting pipe 21 . In this embodiment, the flow limiting member 26 is a one-way valve 261 , and the liquid inside the one-way valve 261 flows from the inside of the boosting pipe 21 to the connecting pipe 22 .

[0045] The measuring assembly 3 includes an outer cylinder 31 with openings at both ends. A pressure core 32 is housed within the outer cylinder 31, the sidewalls of which are fixedly connected to the inner wall of the outer cylinder 31. A splitter 33 is located within the outer cylinder 31, located on one side of the pressure core 32. In this embodiment, the splitter 33 is a four-way splitter 33, electrically connected to the pressure core 32. A cable 34 is electrically connected to the side of the splitter 33 facing away from the pressure core 32. The end of the cable 34, facing away from the splitter 33, exits the interior of the outer cylinder 31 and connects to external monitoring equipment (not shown).

[0046] A connector 35 is provided near the opening of the outer cylinder 31, near the pressure core 32. One end of the connector 35 is inserted into the opening at one end of the outer cylinder 31 and is fixedly connected to the opening. The connecting tube 22 and the oil pipe 11, near the connector 35, both pass through the connector 35 and are fixedly connected to the connecting tube 22. A sealing copper gasket 36 is fixedly connected between the end of the connector 35 inserted into the outer cylinder 31 and the side wall of the outer cylinder 31.

[0047] The end of the outer tube 31 away from the connector 35 is provided with a bottom plug, which is inserted into the opening of the end of the outer tube 31 away from the connector 35 and is fixedly connected to the side wall of the port of the outer tube 31. The end of the cable 34 away from the splitter 33 passes through the bottom plug and is fixedly connected to the bottom plug.

[0048] In actual use, the interior of the oil naan 1 and the booster pipe 21 are first filled with hydraulic oil. After moving the oil naan 1 to the construction site, the oil naan 1 is inserted into the hole to be monitored. The threaded push rod 25 is rotated, which drives the extrusion plate 23 to move. As the extrusion plate 23 moves, the hydraulic oil in the booster pipe 21 is squeezed through the one-way valve 261 and flows into the connecting pipe 22. The hydraulic oil in the connecting pipe 22 flows through the outer cylinder 31 and then through the oil pipe 11 into the oil naan 1, thus replenishing the hydraulic oil in the oil naan 1.

[0049] During use, after the oil-filled naan 1 is squeezed, the hydraulic oil inside flows into the outer tube 31 and contacts the pressure core 32, causing the pressure core 32 to sense the pressure from the hydraulic oil inside the oil-filled naan 1. The pressure core 32 then transmits the pressure to the external device via the distributor 33 and cable 34, thereby monitoring the internal stress of the hole. Furthermore, the presence of the one-way valve 261 prevents the hydraulic oil inside the oil-filled naan 1 from passing through the connecting tube 22 and into the boosting tube 21, thus affecting the monitoring process.

[0050] The implementation principle of Example 1 is: first, fill the oil pan 1 and the boost pipe 21 with hydraulic oil, and then when the hydraulic oil needs to be replenished at the construction site, rotate the threaded push rod 25 to replenish the hydraulic oil inside the boost pipe 21 into the oil pan 1, thereby maintaining a stable pressure inside the oil pan 1.

[0051] During use, the oil naan 1 is squeezed so that the hydraulic oil inside the oil naan 1 enters the side of the pressure core 32 inside the outer cylinder 31, thereby realizing the monitoring of the internal stress of the hole into which the oil naan 1 is inserted.

[0052] Example 2

[0053] Refer to Figure 4. Figure 5 and Figure 6The embodiment of the present application differs from the first embodiment in that the flow limiting member 26 is configured as a blocking block 262, which abuts against the side wall of the liquid outlet 211. The side wall of the liquid outlet 211 is provided with a groove for the blocking block 262 to be inserted. Under normal circumstances, the blocking block 262 is in a state of blocking the liquid outlet 211. A driving assembly 27 is connected to one side of the blocking block 262. The driving assembly 27 is connected to the threaded push rod 25 and can drive the blocking block 262 to move during the rotation of the threaded push rod 25, thereby opening the liquid outlet 211.

[0054] When it is necessary to replenish the hydraulic oil inside the oil naan 1, rotate the threaded push rod 25, and the threaded push rod 25 drives the blocking block 262 to move through the driving component 27, so that the hydraulic oil inside the boost pipe 21 can flow from the liquid outlet 211 to the inside of the oil naan 1 to replenish the hydraulic oil inside the oil naan 1.

[0055] The drive assembly 27 includes a flow restrictor 271 that is sleeved onto the outside of the boost pipe 21. The inner wall of the flow restrictor 271 slides against the outer wall of the boost pipe 21. One end of the flow restrictor 271 is open, and the other end of the flow restrictor 271 has a sidewall at the end thereof, with a gap therebetween. A threaded push rod 25 extends through the sidewall of the end of the flow restrictor 271 and is rotatably and slidingly connected thereto.

[0056] The side wall of the port of the flow limiting cylinder 271 is rotatably connected to a driving bevel gear 272 near the end cover. The driving bevel gear 272 is rotatably sleeved on the outside of the threaded top rod 25 and is slidably connected to the side wall of the threaded top rod 25 along the vertical direction.

[0057] The side wall of the threaded push rod 25 is provided with a plurality of slots 251, each extending along the length of the threaded push rod 25. In this embodiment, four slots 251 are provided, and the four slots 251 are evenly distributed around the outer wall of the threaded push rod 25. A plurality of latching teeth 2721 are fixedly connected to the side wall of the driving bevel gear 272 near the threaded push rod 25. There are four latching teeth 2721, and the four latching teeth 2721 are arranged in a one-to-one correspondence with the four latching slots 251. Each latching tooth 2721 can be inserted into the interior of a corresponding latching slot 251 and slideably abut against the slot wall of the latching slot 251 along the length of the latching slot 251.

[0058] A driven bevel gear 273 meshes with one side of the driving bevel gear 272. A coupling shaft 2731 is fixedly connected to the middle of the side of the driven bevel gear 273 away from the driving bevel gear 272. The end of the coupling shaft 2731 away from the driven bevel gear 273 passes through the side wall of the flow limiting cylinder 271 and is rotationally connected thereto. The end of the coupling shaft 2731, located outside the side wall of the flow limiting cylinder 271, is fixedly connected to a driving pulley 274. A driven pulley 275 is provided on the exterior of the flow limiting cylinder 271, near the blocking block 262, corresponding to the driving pulley 274. Both the driving pulley 274 and the driven pulley 275 are fitted with a common connecting belt 2752.

[0059] The connecting shaft 2731 is connected to a driving pulley 2753 via a belt and pulley drive, and the driving pulley 2753 is penetrated and threadedly connected to a moving screw 2754. The end of the moving screw 2754 away from the driving pulley 2753 is penetrated and threadedly sleeved with a moving plate 276, which is slidably connected to the outside of the adjacent current limiting cylinder 271 along the length of the moving screw 2754.

[0060] A drive ring 277 is provided on the underside of the movable plate 276. A drive collar 2771 is sleeved on the outside of the drive ring 277 and is slidably connected to the drive ring 277 along the axis of the drive ring 277. A movable block 2761 is fixedly connected to the side of the movable plate 276 near the drive collar 2771. The outer wall of the drive collar 2771 has a slot 251 for the movable block 2761 to be inserted into and spirally move around the outer wall of the drive collar 2771.

[0061] The driving collar 2771 is arranged opposite to the driven pulley 275, and a plurality of driven teeth 2772 are fixedly connected to the side of the driving collar 2771 close to the driven pulley 275. A plurality of driving teeth 2751 arranged opposite to the driven teeth 2772 are fixedly connected to the side of the driven pulley 275 close to the driving collar 2771.

[0062] A drive screw 278 is threaded through the center of the drive ring 277 and is threadedly connected thereto. The drive screw 278 sequentially passes through the flow restrictor cylinder 271 and the boost pipe 21 and is fixedly connected to the blocking block 262. A tension spring 279 is installed in the side wall of the liquid outlet 211 of the blocking block 262 away from the drive screw 278. The tension spring 279 connects the side wall of the liquid outlet 211 with the blocking block 262 and can drive the blocking block 262 to move to the liquid outlet 211 to block the liquid outlet 211.

[0063] The implementation principle of Example 2 is: when it is necessary to replenish hydraulic oil into the oil naan 1, the threaded push rod 25 is rotated. During the process of the threaded push rod 25 driving the extrusion plate 23 to move toward the liquid outlet 211, the threaded push rod 25 drives the active bevel gear 272 to rotate through the cooperation of the latch teeth 2721 and the latch groove 251. The active bevel gear 272 drives the driven bevel gear 273 to rotate during the rotation process, and the driven bevel gear 273 drives the connecting shaft 2731 to rotate during the rotation process.

[0064] The connecting shaft 2731 rotates, driving the driving pulley 274, which in turn drives the connecting belt 2752 to rotate. The connecting belt 2752 rotates, driving the driven pulley 275 and the driving pulley 2753. The driving pulley 2753 rotates, which in turn drives the movable screw 2754. The movable screw 2754 rotates, which in turn drives the movable plate 276 to move. The movable plate 276 moves, which in turn drives the driving collar 2771 toward the driven pulley 275, causing the driven latch 2772 to engage with the driving latch 2751. At this time, the rotation of the driven pulley 275 drives the driving collar 2771 and the driving ring 277 to rotate. The driving ring 277 rotates, which in turn drives the driving screw 278 and the blocking block 262 to move, thereby opening the liquid outlet 211.

[0065] When the threaded push rod 25 finishes rotating, the tension spring 279 drives the blocking block 262 to move to the middle position of the liquid outlet 211, thereby blocking the liquid outlet 211, making it difficult for the hydraulic oil inside the connecting pipe 22 to flow back into the oil pan 1.

[0066] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A borehole stress gauge with a self-compensating pressure function, characterized by: The invention comprises an oil-fried naan (1), wherein the end of the oil-fried naan (1) is connected to an oil pipe (11), an end of the oil pipe (11) away from the oil-fried naan (1) is connected to a measuring assembly (3), one side of the measuring assembly (3) is connected to a liquid supply mechanism (2), and the liquid supply mechanism (2) is connected to the oil pipe (11); The liquid supply mechanism (2) includes a boosting pipe (21), the boosting pipe (21) is provided with a cavity inside and is open at both ends, one end opening of the boosting pipe (21) is set as a liquid outlet (211), the liquid outlet (211) is connected to a connecting pipe (22), the connecting pipe (22) is connected to the measuring component (3) and the oil pipe (11), an extrusion plate (23) is provided inside the boosting pipe (21), the side wall of the extrusion plate (23) is in sliding contact with the adjacent inner wall of the boosting pipe (21), and a pipe cover (24) for sealing the end opening of the boosting pipe (21) is connected to the opening of the boosting pipe (21) away from the connecting pipe (22); The pipe cover (24) is penetrated and threadedly connected with a threaded push rod (25), and one end of the threaded push rod (25) penetrates the interior of the boost pipe (21) and abuts against the extrusion plate (23); A flow limiting member (26) is provided at the liquid outlet (211) of the boosting pipe (21), and the flow limiting member (26) is used to limit the hydraulic oil inside the connecting pipe (22) from flowing into the inside of the boosting pipe (21); The measuring assembly (3) comprises an outer cylinder (31), one end of the outer cylinder (31) is connected to the connecting pipe (22) and the oil pipe (11), a pressure core (32) is provided at one end of the oil pipe (11) close to the connecting pipe (22), the pressure core (32) is fixedly connected to the inner wall of the outer cylinder (31), a side of the pressure core (32) away from the connecting pipe (22) is electrically connected to a distributor (33), the distributor (33) is electrically connected to a cable (34), and a rear plug (37) is connected between the outer cylinder (31) and the cable (34); The end of the outer cylinder (31) away from the rear plug (37) is fixedly connected to a connecting piece (35); the connecting pipe (22) and the oil pipe (11) pass through the connecting piece (35) and are fixedly connected to the connecting piece (35); a sealing copper gasket (36) is fixedly connected between the connecting piece (35) and the outer cylinder (31); the flow limiting member (26) is configured as a blocking block (262) located at the liquid outlet (211) and abutting against the side wall of the liquid outlet (211); the blocking block (262) is connected to a driving assembly (27); the driving assembly (27) is connected to the threaded push rod (25) and can drive the blocking block (262) to move during the rotation of the threaded push rod (25) to realize the opening of the liquid outlet (211); The driving assembly (27) comprises a flow-limiting cylinder (271) sleeved on the outside of the boosting pipe (21); the inner wall of the flow-limiting cylinder (271) is rotatably connected to a driving bevel gear (272); the threaded top rod (25) passes through the driving bevel gear (272); the threaded top rod (25) is provided with an internal thread; the inner wall of the threaded top rod (25) is provided with a plurality of slots (251) along the length direction of the threaded top rod (25); the driving bevel gear (272) is close to the threaded top rod (25); The inner wall is fixedly connected with a latching tooth (2721) that can be inserted into the inside of the latching slot (251); one side of the active bevel gear (272) is meshed with a driven bevel gear (273); the driven bevel gear (273) is fixedly connected with a driving pulley (274) through a connecting shaft (2731); the driving pulley (274) is connected to a driven pulley (275) through a connecting belt (2752); the connecting shaft (2731) is also connected to a driving pulley (2753) through a belt and a pulley; the driving pulley (27 53) is penetrated and fixedly connected with a moving screw (2754), the moving screw (2754) is threadedly sleeved with a moving plate (276), the moving plate (276) is provided with a driving ring (277) on the side close to the driven pulley (275), the driving ring (277) is circumferentially slidably connected to the outside of the driving ring (277), the driving ring (2771) is provided with a spiral groove (251) for the moving plate (276) to be plugged in, and the driving ring (2771) is close to the driven pulley One side of the wheel (275) can be engaged with the driven pulley (275), and the middle of the driving ring (277) is penetrated and threadedly connected with a driving screw (278), and the driving screw (278) penetrates the side wall at the liquid outlet (211) and is fixedly connected to the blocking block (262), and the side of the blocking block (262) away from the driving screw (278) is fixedly connected with a tension spring (279) for driving the blocking block (262) to move toward the side away from the driving screw (278).

2. The drilling stress gauge with self-compensation function according to claim 1, characterized in that: The pipe cover (24) is threadedly connected to the boost pipe (21).

3. The drilling stress gauge with self-compensation function according to claim 1, characterized in that: The flow limiting member (26) is configured as a one-way valve (261).

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