Borehole stressometer with self-pressure-supplementing function

Abstract

The invention relates to a borehole stressometer with a self-pressure-supplementing function, and belongs to the technical field of stress monitoring, the borehole stressometer comprises an oil pipe, the end part of the oil pipe is communicated with an oil pipe, one end, far away from the oil pipe, of the oil pipe is communicated with a measuring assembly, one side of the measuring assembly is communicated with a liquid supply mechanism, and the liquid supply mechanism is communicated with the oil pipe. The drilling stressometer has the effect that hydraulic oil can be conveniently poured into the oil pancake of the drilling stressometer.

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 meter 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 body in the formation. It is widely used in geological exploration, petroleum exploration, rock and soil mechanics and other fields.

[0003] The borehole stress gauge currently used mainly has a pressure gauge and oil filling structure, and the hydraulic oil needs to be canned during on-site installation. This method requires more installation tools and other items to be prepared and carried 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 and a stress-strain sensor to measure the product form. The installation of this product is also affected by the hole depth and the installation environment, and it is relatively expensive and has a high product cost. 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 drilling stress gauge with a self-compensating pressure function, which adopts the following technical solution: A drilling stress gauge with a self-pressure compensation function comprises an oil naan, the end of the oil naan 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.

[0006] By adopting the above technical solution and setting up a liquid supply mechanism, it is possible to realize real-time liquid supply operation inside the oil naan at the construction site, thereby reducing the difficulty in carrying hydraulic oil tanks and installation tools at the construction site, 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.

[0007] Optionally, the liquid supply mechanism includes a boost pipe, which has a cavity inside and openings at both ends. The opening at one end of the boost pipe is set as a liquid outlet, and the liquid outlet is connected to a connecting pipe, which is connected to the measuring component and the oil pipe. An extrusion plate is provided inside the boost pipe, and the side wall of the extrusion plate is in sliding abutment with the adjacent inner wall of the boost pipe. The opening at one end of the boost pipe away from the connecting pipe is connected to a pipe cover for sealing the end opening of the boost pipe.

[0008] By adopting the above technical solution, when it is necessary to replenish the hydraulic oil into the oil naan, the extrusion plate is moved. During the movement, the extrusion plate drives the hydraulic oil inside the boost 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.

[0009] 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 inside of the boost tube and abuts against the extrusion plate.

[0010] By adopting the above technical solution, by setting the 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 be restricted by the self-locking effect of the thread, thereby reducing the phenomenon of air mixing into the hydraulic oil inside the oil naan and affecting the detection effect.

[0011] Optionally, the pipe cover is threadedly connected to the boost pipe.

[0012] By adopting the above technical solution, by setting the pipe cover and the boost pipe threaded connection, it is convenient for the staff to open the pipe cover and inject hydraulic oil into the boost pipe.

[0013] 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.

[0014] By adopting the above technical solution and setting a flow limiting component, the phenomenon that the hydraulic oil inside the oil pan enters the boost pipe through the connecting pipe during the test and affects the measurement results is reduced.

[0015] Optionally, the measuring component includes an outer cylinder, one end of the outer cylinder is connected to the connecting pipe and the oil pipe, the oil pipe is provided with a pressure core at one end close to the connecting pipe, the pressure core is fixedly connected to the inner wall of the outer cylinder, the side of the pressure core away from the connecting pipe is electrically connected to a splitter, the splitter is electrically connected to a cable, and a rear plug is connected between the outer cylinder and the cable.

[0016] By adopting the above technical solution, when the hydraulic oil enters the outer cylinder and is located on one side of the pressure movement, the pressure movement monitors the change in the 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.

[0017] Optionally, one 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.

[0018] By adopting the above technical solution, by providing a connector and a sealing copper pad, the dust is reduced from entering the position between the connector and the pressure core inside the outer cylinder, thereby affecting the monitoring results.

[0019] Optionally, the flow limiting member is configured as a one-way valve.

[0020] 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 booster pipe.

[0021] Optionally, the flow limiting component is configured as a blocking block located at the liquid outlet and abutting against the side wall of the liquid outlet, the blocking block is connected to a driving component, the driving component 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.

[0022] 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.

[0023] Optionally, the driving assembly includes a flow limiting cylinder sleeved on the outside of the boost pipe, the inner wall of the flow limiting cylinder is rotatably connected to a driving bevel gear, the threaded push rod penetrates the driving bevel gear, the threaded push rod is set as an internal thread and the inner wall of the threaded push rod is provided with a plurality of grooves along the length direction of the threaded push rod, the driving bevel gear is fixedly connected with a tooth that can be inserted into the groove near the inner wall of the threaded push rod, the driving bevel gear is meshed with a driven bevel gear on one side, the driven bevel gear is fixedly connected to a driving pulley through a connecting shaft, the driving pulley is connected to a driven pulley through a connecting belt, the connecting shaft is also connected to a driving pulley through a belt and a pulley, and the driving The driving wheel is penetrated by and threadedly connected with a movable screw, and the movable screw is threadedly sleeved with a movable plate, and the movable plate is provided with a driving ring on the side of the driven wheel close to the driven wheel, and a driving sleeve is slidably connected to the outside of the driving ring. A spiral groove for inserting the movable plate is provided on the outside of the driving sleeve for plugging the movable plate, and the driving sleeve is capable of being clamped with the driven wheel close to the driven wheel. The middle of the driving ring is penetrated by and threadedly connected with a driving screw, and the driving screw penetrates the side wall of the liquid outlet and is fixedly connected to the blocking block, and a tension spring is fixedly connected to the side of the blocking block away from the driving screw for driving the blocking block to move away from the driving screw.

[0024] By adopting the above technical scheme, the active bevel gear is driven to rotate during the rotation of the threaded push rod, the active bevel gear drives the driven bevel gear to rotate, the driven bevel gear drives the active pulley, the connecting belt, the driven pulley and the driving pulley to rotate, and the driving pulley drives the movable plate and the driving sleeve ring to move during the rotation and realizes the clamping connection between the driving sleeve ring and the driven pulley. At the same time, the driven pulley drives the driving sleeve ring and the driving ring 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 to realize the blocking of the liquid outlet.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 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; 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; 3. By setting a one-way valve or a limit block and a drive component, the hydraulic oil flowing from the connecting pipe to the boost pipe can be blocked, thereby reducing the phenomenon that the hydraulic oil inside the oil pump flows into the boost pipe and affects the monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0027] Figure 2 It is a cross-sectional view of the overall structure of Example 1 of the present application.

[0028] Figure 3 yes Figure 2 A partial enlarged schematic diagram of the structure A in the middle.

[0029] Figure 4 It is a cross-sectional view of the overall structure of Example 2 of the present application.

[0030] Figure 5 yes Figure 4 A partial enlarged schematic diagram of the structure B in the figure.

[0031] Figure 6 yes Figure 4 A partial enlarged schematic diagram of the C structure in the middle.

[0032] Description of the accompanying drawings: 1, oil naan; 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 pad; 37, rear plug. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 -Attached Figure 6 This application is described in further detail.

[0034] The embodiment of the present application discloses a drilling stress gauge with a self-pressure compensation function.

[0035] Example 1 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, and the measuring component 3 is connected to a liquid supply mechanism 2, and the liquid supply mechanism 2 is also connected to the oil pipe 11.

[0036] By providing the liquid supply mechanism 2, during use, hydraulic oil can be injected into the oil naan 1 through the liquid supply mechanism 2, thereby facilitating the process of injecting hydraulic oil into the oil naan 1 at the construction site.

[0037] Reference Figure 2 and Figure 3 The liquid supply mechanism 2 includes a boosting pipe 21, the boosting pipe 21 is hollow inside and both ends of the boosting pipe 21 are provided with openings connecting the inner cavity of the boosting pipe 21 with the outside, and one of the openings of the boosting pipe 21 is set as a liquid outlet 211. A connecting pipe 22 is fixedly connected to the side wall of the boosting pipe 21 at the liquid outlet 211, and the connecting pipe 22 is connected to the inner cavity of the boosting pipe 21. An extrusion plate 23 is also provided inside the boosting pipe 21, and the outer wall of the extrusion plate 23 is slidably abutted against the inner wall of the boosting pipe 21 along the length direction of the boosting pipe 21.

[0038] A pipe cover 24 is provided at the opening of the boost pipe 21 away from the connecting pipe 22. The pipe cover 24 is threadedly connected to the side wall of the port of the boost pipe 21 away from the connecting pipe 22 and can block the opening of the boost pipe 21 away from the connecting pipe 22. A threaded push rod 25 is penetrated and threadedly connected to the middle position of the pipe cover 24. The threaded push rod 25 is vertically arranged with the side wall of the connected pipe cover 24. The threaded push rod 25 penetrates to one end of the boost pipe 21 and abuts against the extrusion plate 23 inside the boost pipe 21.

[0039] 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 in the one-way valve 261 flows from the inside of the boosting pipe 21 to the connecting pipe 22 .

[0040] The measuring assembly 3 includes an outer cylinder 31, and both ends of the outer cylinder 31 are provided with openings. A pressure core 32 is provided inside the outer cylinder 31, and the side wall of the pressure core 32 is fixedly connected to the inner wall of the outer cylinder 31. A splitter 33 is provided inside the outer cylinder 31 on one side of the pressure core 32. In this embodiment, the splitter 33 is a four-way splitter 33, and the splitter 33 is electrically connected to the pressure core 32. A cable 34 is electrically connected to the side of the splitter 33 away from the pressure core 32, and one end of the cable 34 away from the splitter 33 passes through the inside of the outer cylinder 31 and is connected to an external monitoring device, which is not shown in the figure.

[0041] A connector 35 is provided at the opening of the outer cylinder 31 near the pressure core 32, and one end of the connector 35 is inserted into the opening of one end of the outer cylinder 31 and fixedly connected to the opening. The connecting pipe 22 and the end of the oil pipe 11 near the connector 35 both pass through the connector 35 and are fixedly connected to the connecting pipe 22. A sealing copper gasket 36 is fixedly connected between the end of the connector 35 inserted into the inner part of the outer cylinder 31 and the side wall of the outer cylinder 31.

[0042] The end of the outer tube 31 away from the connector 35 is provided with a bottom plug, one end of the bottom plug is inserted into the opening of the end of the outer tube 31 away from the connector 35 and is fixedly connected to the port side wall 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.

[0043] In actual use, the inside of the oil naan 1 and the boosting pipe 21 are first filled with hydraulic oil, and then after being moved to the construction site, the oil naan 1 is plugged into the hole to be monitored. The threaded push rod 25 is rotated, and the threaded push rod 25 drives the extrusion plate 23 to move. During the movement of the extrusion plate 23, the hydraulic oil in the boosting 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 flows into the oil naan 1 through the oil pipe 11, thereby realizing the replenishment process of the hydraulic oil in the oil naan 1.

[0044] During use, after the oil naan 1 is squeezed, the hydraulic oil inside the oil naan 1 flows into the outer cylinder 31 and abuts against the pressure core 32, so that the pressure core 32 feels the pressure from the hydraulic oil inside the oil naan 1, and then the pressure core 32 transmits the pressure to the external device through the splitter 33 and the cable 34, thereby realizing the monitoring process of the internal stress of the hole. And due to the presence of the one-way valve 261, it is difficult for the hydraulic oil inside the oil naan 1 to pass through the connecting pipe 22 and flow into the boosting pipe 21, thereby affecting the monitoring process.

[0045] The implementation principle of Example 1 is: first, fill the oil pan 1 and the boost pipe 21 with hydraulic oil. 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.

[0046] 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.

[0047] Example 2 Refer to Figure 4. Figure 5 and Figure 6 The embodiment of the present application is different from the embodiment 1 in that the flow limiting member 26 is configured as a blocking block 262, the blocking block 262 abuts against the side wall of the liquid outlet 211, and a groove for the blocking block 262 to be inserted is provided on the side wall of the liquid outlet 211. The blocking block 262 is in a blocking state for the liquid outlet 211 under normal conditions. A driving assembly 27 is connected to one side of the blocking block 262, and 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.

[0048] When it is necessary to supplement 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 assembly 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 supplement the hydraulic oil inside the oil naan 1.

[0049] The driving assembly 27 includes a flow limiting cylinder 271 sleeved on the outside of the boost pipe 21, the inner wall of the flow limiting cylinder 271 is in sliding contact with the outer wall of the boost pipe 21, and one end of the flow limiting cylinder 271 is open, and a side wall is provided at the port of the other end of the flow limiting cylinder 271 and there is a gap between the flow limiting cylinder 271 and the pipe cover 24. The threaded push rod 25 passes through the side wall of the port of the flow limiting cylinder 271 and is rotatably and slidably connected with the side wall of the port of the flow limiting cylinder 271.

[0050] A driving bevel gear 272 is rotatably connected to a side of the port side wall of the flow limiting cylinder 271 close to 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.

[0051] The side wall of the threaded push rod 25 is provided with a plurality of slots 251, and the length direction of each slot 251 is provided along the length direction 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 teeth 2721 are fixedly connected to the side wall of the active bevel gear 272 close to the threaded push rod 25. Four teeth 2721 are provided, and the four teeth 2721 are provided in a one-to-one correspondence with the four slots 251. Each tooth 2721 can be inserted into the corresponding slot 251 and slide against the slot wall of the slot 251 along the length direction of the slot 251.

[0052] A driven bevel gear 273 is meshed with one side of the driving bevel gear 272, and a connecting shaft 2731 is fixedly connected to the middle position of the side of the driven bevel gear 273 away from the driving bevel gear 272, and one end of the connecting shaft 2731 away from the driven bevel gear 273 passes through the side wall of the flow limiting cylinder 271 and is rotatably connected to the side wall of the flow limiting cylinder 271. A driving pulley 274 is fixedly connected to one end of the connecting shaft 2731 located outside the side wall of the flow limiting cylinder 271. A driven pulley 275 corresponding to the driving pulley 274 is provided on the side of the flow limiting cylinder 271 near the blocking block 262. The driving pulley 274 and the driven pulley 275 are sleeved with the same connecting belt 2752.

[0053] The connecting shaft 2731 is connected to the driving pulley 2753 through a belt and a pulley drive, and the driving pulley 2753 is penetrated and threadedly connected with 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, and the moving plate 276 is slidably connected to the outside of the adjacent current limiting cylinder 271 along the length direction of the moving screw 2754.

[0054] A driving ring 277 is provided at the lower side of the moving plate 276, and a driving collar 2771 is sleeved on the outside of the driving ring 277, and the driving collar 2771 is slidably connected to the driving ring 277 along the axial direction of the driving ring 277. A moving block 2761 is fixedly connected to the side of the moving plate 276 close to the driving collar 2771, and a groove 251 is provided on the outer wall of the driving collar 2771 for the moving block 2761 to be inserted and spirally move around the outer wall of the driving collar 2771.

[0055] The driving collar 2771 is arranged opposite to the driven pulley 275, and a plurality of driven teeth 2772 are fixedly connected to one 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 one side of the driven pulley 275 close to the driving collar 2771.

[0056] The center of the driving ring 277 is penetrated and threadedly connected with a driving screw 278, which sequentially penetrates the flow limiting cylinder 271 and the boosting pipe 21 and is fixedly connected to the blocking block 262. A tension spring 279 is provided in the side wall of the liquid outlet 211 of the blocking block 262 away from the driving screw 278. The tension spring 279 simultaneously connects the side wall of the liquid outlet 211 and the blocking block 262 and can drive the blocking block 262 to move to the liquid outlet 211 to block the liquid outlet 211.

[0057] The implementation principle of Example 2 is: when it is necessary to add hydraulic oil to the inside of the oil pan 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 tooth 2721 and the latch groove 251. During the rotation, the active bevel gear 272 drives the driven bevel gear 273 to rotate, and during the rotation, the driven bevel gear 273 drives the connecting shaft 2731 to rotate.

[0058] The connecting shaft 2731 drives the driving pulley 274 to rotate during the rotation process, the driving pulley 274 drives the connecting belt 2752 to rotate, the connecting belt 2752 drives the driven pulley 275 and the driving pulley 2753 to rotate during the rotation process, the driving pulley 2753 drives the moving screw 2754 to rotate during the rotation process, the moving screw 2754 drives the moving plate 276 to move during the rotation process, the moving plate 276 drives the driving collar 2771 to move toward the driven pulley 275 during the movement process, and the driven latch 2772 and the driving latch 2751 are engaged. At this time, as the driven pulley 275 rotates, the driving collar 2771 and the driving ring 277 are driven to rotate, and the driving ring 277 drives the driving screw 278 and the blocking block 262 to move during the rotation process, thereby realizing the opening of the liquid outlet 211.

[0059] 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.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A drilling stress gauge with self-compensation function, characterized in that: The invention comprises an oil naan (1), wherein the end of the oil naan (1) 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), one side of the measuring component (3) is connected to a liquid supply mechanism (2), and the liquid supply mechanism (2) is connected to the oil pipe (11).

2. The drilling stress gauge with self-pressure compensation function according to claim 1, characterized in that: The liquid supply mechanism (2) comprises a boosting pipe (21), wherein a cavity is provided inside the boosting pipe (21) and both ends are open. The opening at one end of the boosting pipe (21) is set as a liquid outlet (211), and 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), and the side wall of the extrusion plate (23) is in sliding contact with the inner wall of the adjacent boosting pipe (21). The opening at one end of the boosting pipe (21) away from the connecting pipe (22) is connected to a pipe cover (24) for sealing the end opening of the boosting pipe (21).

3. The drilling stress gauge with self-pressure compensation function according to claim 2, characterized in that: 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 into the inside of the boost pipe (21) and abuts against the extrusion plate (23).

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

5. The drilling stress gauge with self-pressure compensation function according to claim 3, characterized in that: A flow limiting component (26) is provided at the liquid outlet (211) of the boosting pipe (21), and the flow limiting component (26) is used to limit the hydraulic oil inside the connecting pipe (22) from flowing into the inside of the boosting pipe (21).

6. The drilling stress gauge with self-pressure compensation function according to claim 5, characterized in that: 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), one end of the oil pipe (11) close to the connecting pipe (22) is provided with a pressure core (32), the pressure core (32) is fixedly connected to the inner wall of the outer cylinder (31), the 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).

7. The drilling stress gauge with self-pressure compensation function according to claim 6, characterized in that: A connecting piece (35) is fixedly connected to one end of the outer cylinder (31) away from the rear plug (37); 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).

8. The drilling stress gauge with self-pressure compensation function according to claim 7, characterized in that: The flow limiting member (26) is configured as a one-way valve (261).

9. The drilling stress gauge with self-pressure compensation function according to claim 7, characterized in that: The flow limiting member (26) is configured as a blocking block (262) located at the liquid outlet (211) and abutting against a 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 is capable of driving the blocking block (262) to move during the rotation of the threaded push rod (25) to open the liquid outlet (211).

10. The drilling stress gauge with self-pressure compensation function according to claim 9, characterized in that: The driving assembly (27) comprises a flow limiting cylinder (271) sleeved on the outside of the boost pipe (21); the inner wall of the flow limiting cylinder (271) is rotatably connected to a driving bevel gear (272); the threaded push rod (25) passes through the driving bevel gear (272); the threaded push rod (25) is provided with an internal thread and the inner wall of the threaded push rod (25) is provided with a plurality of slots (251) along the length direction of the threaded push rod (25); the driving bevel gear (272) is close to the threaded push rod (25). The inner wall is fixedly connected with a latching tooth (2721) that can be inserted into the inside of the latching groove (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) via a connecting shaft (2731); the driving pulley (274) is connected with a driven pulley (275) via a connecting belt (2752); the connecting shaft (2731) is also connected with a driving pulley (2753) via a belt and a pulley; the driving pulley (2731) is connected with a driven pulley (2753) via a belt and a pulley; 53) is penetrated and threadedly connected with a movable screw (2754), the movable screw (2754) is threadedly sleeved with a movable plate (276), the movable 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 movable plate (276) to be inserted, the driving ring (2771) is close to the driven pulley One side of the wheel (275) can be snap-connected with the driven pulley (275), and a driving screw (278) is penetrated through the middle of the driving ring (277) and is threadedly connected. The driving screw (278) penetrates the side wall at the liquid outlet (211) and is fixedly connected to the blocking block (262). A tension spring (279) is fixedly connected to the side of the blocking block (262) away from the driving screw (278) for driving the blocking block (262) to move toward the side away from the driving screw (278).

Images