A waterproof mining optical fiber drilling stress sensor based on 5G fusion technology

Abstract

A waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is used to detect changes in rock bearing stress in the borehole, including a control and analysis module, a detection module and a sensing module. The sensing module is arranged in the borehole, and is connected to the detection module arranged outside the borehole through an oil pipe. The detection module and the control and analysis module are connected through an optical cable. The detection module is provided with an optical fiber, which can convert the pressure condition of the sensing module into an optical signal and transmit it to the control and analysis module. The control and analysis module can analyze and convert the optical signal into a corresponding electrical signal. In addition, a mine safety data recording server is also provided outside the mine, which is used to record the data sent back by various safety monitoring sensors in the mine, so as to facilitate data analysis by relevant personnel. The control and analysis module is connected to the safety data recording server through 5G fusion technology to reduce data transmission delay and ensure the real-time nature of monitoring data.

Description

Technical Field

[0001] The present invention relates to the field of mine safety production technology, and specifically to the invention as described above: a waterproof mine-use optical fiber drilling stress sensor based on 5G fusion technology. Background Art

[0002] In the process of coal mining operations, mining accidents occur from time to time, which seriously threaten the safety of life and property of miners. With the advancement of science and technology, the use of some sensors to monitor the stress changes of rock strata in mine tunnels and timely take corresponding strengthening support measures can effectively prevent the occurrence of mining accidents.

[0003] Among various sensors, there is a fiber optic drilling stress sensor, which can be installed in the drill holes of reserved coal pillars, coal bodies and other rock formations to monitor the changes in the bearing stress of the rock formations. Because this sensor is a passive intrinsically safe product that uses grating fiber optic technology, it has the advantage of not requiring power supply and can be installed in mines with explosive gases.

[0004] However, most fiber optic drilling stress sensors currently on the market require an oil bag or air bag to be installed. The oil bag or air bag is inserted into the borehole, and then filled with hydraulic oil or gas to expand the oil bag or air bag in the borehole, so that the oil bag or air bag contacts the inner wall of the borehole, and the change in the rock formation bearing stress is obtained by monitoring the pressure change in the oil bag or air bag. The invention patent with the patent number CN201310476916.X discloses a multi-point fiber optic Bragg grating drilling stress test device for a coal mine underground. The device uses an air bag to monitor the rock formation bearing stress, and the air bag also needs to be inflated to expand.

[0005] At present, the fiber optic drilling stress sensors using oil bags on the market need to use oil pumps and oil tanks to fill the oil bags with hydraulic oil, while the fiber optic drilling stress sensors using air bags need to use air pumps to inflate the air bags. Regardless of the above-mentioned fiber optic drilling stress sensors, workers are required to carry additional equipment into the tunnel to pressurize them. These devices are heavy and inconvenient to carry, which seriously affects the work efficiency of workers. In addition, after the oil bag or air bag is pressurized and released many times, structural fatigue is prone to occur, resulting in oil or air leakage, which interferes with the normal monitoring of the change in the bearing stress of the rock formation by the fiber optic drilling stress sensor. Summary of the invention

[0006] In order to solve the deficiencies in the prior art, the present invention provides a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology as described above.

[0007] The technical solution of the present invention is as follows:

[0008] A waterproof mining optical fiber drilling stress sensor based on 5G fusion technology, used to detect changes in rock bearing stress in the borehole, including a control analysis module, a detection module and a sensing module. The sensing module is arranged in the borehole, and is connected to the detection module arranged outside the borehole through an oil pipe. The detection module is connected to the control analysis module through an optical cable. An optical fiber is arranged in the detection module, which can convert the pressure of the sensing module into an optical signal and transmit it to the control analysis module. The control analysis module can analyze and convert the optical signal into a corresponding electrical signal. In addition, a mine safety data recording server is also arranged outside the mine to record the data sent back by each safety monitoring sensor in the mine, so as to facilitate data analysis by relevant personnel. The control analysis module is connected to the safety data recording server through 5G fusion technology to reduce data transmission delay and ensure the real-time nature of monitoring data.

[0009] The sensing module includes an oil bag part and an extension part, the oil bag part is filled with hydraulic oil and is in the shape of a long strip, the extension part includes an extension unit, a universal flexible shaft and a driving crank, the extension unit includes a fixed slide, a movable wedge and a lifting block, the lower surface of the fixed slide is connected to the outer surface of the oil bag part, the upper surface of the fixed slide is elastically connected to the lifting block, and the lower surface of the lifting block is arranged closely to the upper surface of the fixed slide in a default state, the movable wedge is slidably connected between the fixed slide and the lifting block, the upper surface of the movable wedge is an inclined surface, and the bottom end of the inclined surface is placed toward the inner side of the fixed slide, the movable wedge is slidably connected to the lower surface of the lifting block by an inclined surface, and a threaded screw is threadedly connected to the middle of the movable wedge. The threaded screw is arranged along the setting direction of the fixed slide seat, and the threaded screw can drive the movable wedge to slide along the setting direction of the fixed slide seat, so that the movable wedge can lift the lifting block to contact the upper side of the inner wall of the drill hole, and the threaded screw is rotatably connected to the inner end of the universal flexible shaft, and the outer end of the universal flexible shaft is rotatably connected to a driving crank, and the lifting block of the extension unit can be driven to rise by shaking the driving crank to contact and tighten with the upper side of the inner wall of the drill hole. Compared with equipment such as oil pumps and oil barrels, the universal flexible shaft and the driving crank of the extension part are lighter in weight, more convenient to carry and move in narrow lanes, and more convenient to operate. Moreover, the lifting height of the lifting block and the tightening degree of the extension part can be accurately operated by the user through the driving crank;

[0010] The outer side of the detection module is wrapped with a waterproof cover made of rubber. The interior of the detection module is provided with precision parts including optical fiber gratings, which are very sensitive to the corrosion interference of water. Putting the waterproof cover on the outer side of the detection module can, on the one hand, prevent moisture from penetrating into the detection module and interfering with its normal use, and on the other hand, it can also prevent the outer shell from rusting.

[0011] In order to enable the lifting block to rise horizontally, the movable wedge block includes a left wedge block and a right wedge block, and the left wedge block and the right wedge block are mirror-symmetrical. The left and right ends of the left and right wedge blocks are used to lift the lifting block at the same time to prevent the lifting block from tilting, which makes it unable to fit tightly with the upper side of the inner wall of the borehole. The left and right ends of the upper surface of the fixed slide seat are respectively provided with a sliding half groove, and the length of the sliding half groove is greater than the corresponding length of the left wedge block or the corresponding length of the right wedge block, so that the left wedge block and the right wedge block can slide along the sliding half groove.

[0012] Furthermore, the left wedge block and the right wedge block are both composed of an upper wedge-shaped portion and a lower sliding portion, the cross-sectional shape of the sliding portion matches the cross-sectional shape of the sliding half-groove, a threaded hole is provided in the middle of the sliding portion, the threaded hole is provided along the length direction of the sliding portion, the threaded screw passes through the threaded hole, the right side of the upper surface of the wedge-shaped portion of the left wedge block is tilted downward to form an inclination angle a, the magnitude of the inclination angle a is 15-30 degrees, the left side of the upper surface of the wedge-shaped portion of the right wedge block is tilted downward to form an inclination angle b, the magnitude of the inclination angle b is the same as the magnitude of the inclination angle a.

[0013] A left wedge surface and a right wedge surface are respectively provided on the left and right sides of the bottom surface of the lifting block, the left end of the left wedge surface is tilted upward to form an inclination angle c, the size of the inclination angle c is the same as the size of the inclination angle a, the right end of the right wedge surface is tilted upward to form an inclination angle d, the size of the inclination angle d is the same as the size of the inclination angle b, the upper surfaces of the left wedge block and the right wedge block are in oblique contact with the left wedge surface and the right wedge surface, when the threaded screw drives the left wedge block and the right wedge block to move toward the middle at the same time, the movable wedge block in oblique contact can lift the lifting block with a smaller force.

[0014] In order to prevent the lifting block and the movable wedge block from accidentally shifting in position during the process of the left wedge block and the right wedge block moving toward the middle to squeeze and lift, the upper surface of the wedge-shaped portion is provided with a positioning groove arranged along the inclined surface, and the left wedge surface and the right wedge surface are provided with raised positioning strips at the relative positions of the positioning grooves.

[0015] The left wedge block and the right wedge block need to slide in the corresponding sliding half-groove. If the position is not limited, there is a risk that the left wedge block and the right wedge block will fall out of the corresponding sliding half-groove. Therefore, a limiting groove is provided on the side wall on the inner side of the sliding half-groove. The limiting groove is provided along the setting direction of the sliding half-groove. The sliding parts of the left wedge block and the right wedge block are provided with raised limiting strips at the relative positions of the limiting grooves.

[0016] A through hole is provided between the sliding half grooves at the left and right ends of the fixed slide seat, and the diameter of the through hole is larger than the diameter of the threaded screw to prevent the through hole from rubbing against the threaded screw and affecting the normal rotation of the threaded screw. The threaded screw passes through the threaded hole of the left wedge block, the through hole and the threaded hole of the right wedge block in sequence, and the thread on the inner wall of the threaded hole of the left wedge block is opposite to the thread on the inner wall of the threaded hole of the right wedge block, and the thread on the threaded screw corresponds to it. When the threaded screw rotates in a certain direction, under the meshing of the threads in the opposite rotation directions, the left wedge block and the right wedge block can move to both ends or to the middle at the same time.

[0017] In order to prevent the left wedge block and the right wedge block from sliding out of the openings on the side of the sliding half groove, a left baffle is provided at the left opening of the sliding half groove at the left end, and a right baffle is provided at the right opening of the sliding half groove at the right end. A limiting hole is provided in the middle of the left baffle and the right baffle, and the threaded screw includes a positioning section at the left end, a threaded section in the middle and a connecting section at the right end. The diameters of the positioning section and the connecting section are smaller than the diameter of the threaded section and match the diameter of the limiting hole.

[0018] As described above, a waterproof mining fiber optic drilling stress sensor based on 5G fusion technology is provided with a connector at the position of the limiting hole of the right baffle, and the connector is arranged on the opposite side of the right baffle facing the sliding half groove, and the connecting section passes through the connector, and the universal flexible shaft includes a middle shaft core and a soft protective shell wrapped on the outside, and the fixed slide is movably connected to the universal flexible shaft through the connector, and the connecting section is coaxially connected to the shaft core of the universal flexible shaft, so that the universal flexible shaft and the driving crank can be disassembled from the oil bag part for easy separate carrying.

[0019] The beneficial effects of the present invention are:

[0020] 1. The waterproof mining optical fiber drilling stress sensor based on 5G fusion technology described in the present invention has a waterproof cover wrapped on the outside of the detection module, so that the detection module has waterproof ability to prevent moisture from affecting the normal operation of the detection module;

[0021] 2. The waterproof mining optical fiber drilling stress sensor based on 5G fusion technology described in the present invention is a conventional drilling stress sensor that is mostly fixed by filling an oil bag or an air bag with oil or air to expand it, which requires carrying heavy tools such as an air pump or an oil pump, which is inconvenient to carry. However, the present invention provides an extension part on the oil bag part, and the extension part can be extended by shaking the driving crank to complete the fixation, which is more convenient to carry and simpler and faster to use.

[0022] 3. The waterproof mining optical fiber drilling stress sensor based on 5G fusion technology described in the present invention does not need to expand as much as a traditional oil bag or air bag, and its volume change is relatively small, and it is not easy to cause structural fatigue, and has a longer service life than a traditional oil bag or air bag;

[0023] 4. The waterproof mining optical fiber drilling stress sensor based on 5G fusion technology described in the present invention, the control and analysis module of the sensor is connected to the security data recording server through 5G fusion technology, the data transmission speed is faster, and relevant personnel can obtain the sensor monitoring data more timely. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0025] In the attached picture:

[0026] Figure 1 This is a schematic diagram of the structure of a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology in Example 1;

[0027] Figure 2 It is a left view of the sensing module in Example 1;

[0028] Figure 3 It is a right side view of the sensing module in Example 1;

[0029] Figure 4 It is a right view of the sensing module in Example 1 (with the right baffle removed);

[0030] Figure 5 It is a front view of the sensing module (unexpanded state) in Example 1;

[0031] Figure 6 It is a front view of the sensing module (in the unfolded state) in Example 1;

[0032] Figure 7 is a front view of the lifting block in Example 1;

[0033] Figure 8 is a top view of the lifting block in Example 1;

[0034] Fig. 9 is a top view of the fixed slide in Example 1;

[0035] Fig.10 is a top view of the right wedge in Example 1;

[0036] Fig.11is a front view of the right wedge in Example 1;

[0037] Fig.12 Schematic diagram of the structure of the threaded screw in Example 1;

[0038] Fig.13 is a schematic diagram of the structure of the connecting hole in Example 1;

[0039] Fig.14 This is a schematic diagram of the structure of the detection module in Example 1;

[0040] Fig.15 This is a schematic diagram of the structure of the universal flexible shaft in Example 1;

[0041] The components represented by the reference numerals in the figure are:

[0042] 1. Control and analysis module; 2. Detection module; 21. Waterproof cover; 3. Sensing module; 31. Oil bag; 32. Extension part; 33. Extension unit; 331. Fixed slide seat; 3311. Sliding half groove; 3312. Limiting slide groove; 3313. Left baffle; 3314. Right baffle; 3315. Connector; 3316. Limiting hole; 3317. Through hole; 332. Movable wedge; 3321. Left wedge; 3322. Right wedge; 3323. Wedge-shaped part; 3324. Sliding part; 3325. Threaded hole ; 3326, positioning groove; 3327, limit strip; 333, lifting block; 3331, connecting hole; 3332, positioning bolt; 3333, return spring; 3334, anti-slip buffer pad; 3335, left wedge surface; 3336, right wedge surface; 3337, positioning strip; 334, threaded screw; 3341, positioning section; 3342, threaded section; 3343, connecting section; 34, universal flexible shaft; 341, fixed grip; 342, connecting tube; 343, finger ring; 344, thumb ring; 35, driving crank handle. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with specific implementation methods and further examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention. Specific implementation method:

[0045] See also Figure 1-Figure 15, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology, which is used to detect changes in rock bearing stress in the borehole, includes a control and analysis module 1, a detection module 2 and a sensing module 3, wherein the sensing module 3 is arranged in the borehole, and is connected to the detection module 2 arranged outside the borehole through an oil pipe, and the detection module 2 is connected to the control and analysis module 1 through an optical cable, and an optical fiber is arranged in the detection module 2, which can convert the pressure condition of the sensing module 3 into an optical signal and transmit it to the control and analysis module 1. The utility model patent with patent number CN202023179993.3 mentions a fiber grating pressure sensor, and the structure and working principle of the detection module 2 described in this embodiment are similar to them, so they will not be repeated here. The control and analysis module 1 can convert the optical signal into a corresponding electrical signal. In addition, a mine safety data recording server is provided outside the mine to record the data sent back by various safety monitoring sensors in the mine, so as to facilitate data analysis by relevant personnel and improve the accuracy of prediction of mine accidents. The control and analysis module 1 is connected to the safety data recording server through 5G fusion technology to reduce data transmission delay and ensure the real-time nature of monitoring data, so that relevant personnel can make judgments and early warnings quickly according to the real-time data sent back, and protect the life and property of the personnel in the mine in time.

[0046] like Figure 1-Figure 6As shown, the sensing module 3 includes an oil bag portion 31 and an extension portion 32. The oil bag portion 31 is filled with hydraulic oil and is in the shape of a long strip. The hydraulic oil capacity in the oil bag portion 31 of the sensing module 3 remains constant, and the task of expanding and contacting with the inner wall of the borehole to tighten is completed by the extension portion 32. Therefore, the oil bag portion 31 does not need to use additional equipment to add hydraulic oil, which reduces the carrying of additional equipment such as oil pumps and oil barrels, can improve the work efficiency of the staff, reduce work intensity, and the lack of need to replenish hydraulic oil also means that the oil bag does not need to shrink significantly, which can effectively reduce the occurrence of structural fatigue, extend the service life of the oil bag portion 31, and avoid leakage of the oil bag portion 31 to affect the monitoring accuracy of the sensor. The extension part 32 includes an extension unit 33, a universal flexible shaft 34 and a driving crank 35. The extension unit 33 includes a fixed slide 331, a movable wedge block 332 and a lifting block 333. The lower surface of the fixed slide 331 is connected to the outer surface of the oil bag part 31. The upper surface of the fixed slide 331 is elastically connected with the lifting block 333. In the default state, the lower surface of the lifting block 333 is set close to the upper surface of the fixed slide 331. The movable wedge block 332 is slidably connected between the fixed slide 331 and the lifting block 333. The upper surface of the movable wedge block 332 is an inclined surface, and the bottom end of the inclined surface is placed toward the inner side of the fixed slide (331). The movable wedge block 332 and the lifting block 333 are connected. The lower surface of 33 is an inclined sliding connection, and the middle of the movable wedge block 332 is threadedly connected with a threaded screw 334, and the threaded screw 334 is set along the setting direction of the fixed slide seat 331. The threaded screw 334 can drive the movable wedge block 332 to slide along the setting direction of the fixed slide seat 331, so that the movable wedge block 332 can lift the lifting block 333 to contact the upper side of the inner wall of the borehole, and the threaded screw 334 is rotatably connected to the inner end of the universal flexible shaft 34, and the outer end of the universal flexible shaft 34 is rotatably connected with a driving crank 35. By shaking the driving crank 35, the lifting block 333 of the extension unit 33 can be driven to rise and contact and press tightly with the upper side of the inner wall of the borehole. Compared with oil pumps and oil barrels, The equipment, the universal flexible shaft 34 and the driving crank 35 of the extension part 32 are lighter, more convenient to carry and move in narrow tunnels, and more convenient to operate. Moreover, the lifting height of the lifting block 333 and the tightening degree of the extension part 32 can be accurately operated by the user through the driving crank 35. The drilling stress sensor monitors the change of stress in the rock formation in essence. Therefore, whether the oil bag part 31 of the traditional drilling stress sensor expands and presses against the inner wall of the borehole, or the extension part 32 expands and presses against the inner wall of the borehole, the monitored data are the same. The drilling stress sensor described in this embodiment can completely replace the traditional drilling stress sensor to monitor the change of rock formation stress.

[0047] See also Figure 8 and Fig.13Preferably, the lifting block 333 is provided with four connecting holes 3331, and the four connecting holes 3331 are distributed in a rectangular shape. A positioning bolt 3332 is provided in the connecting hole 3331, and the lower end of the positioning bolt 3332 is screwed into the upper surface of the fixed slide seat 331 to connect the lifting block 333 with the fixed slide seat 331. The connecting hole 3331 includes a screw head and a screw rod from top to bottom. The diameter of the screw head is larger than the diameter of the bolt head of the positioning bolt 3332, so that the bolt head of the positioning bolt 3332 can The lifting block 333 can slide up and down in the screw head of the connecting hole 3331. The diameter of the screw portion is smaller than the diameter of the bolt head of the positioning bolt 3332 and larger than the diameter of the bolt rod of the positioning bolt 3332, so that the bolt rod of the positioning bolt 3332 can slide up and down in the screw portion of the connecting hole 3331. A reset spring 3333 is arranged between the lower surface of the bolt head of the positioning bolt 3332 and the bottom surface of the screw portion. The reset spring 3333 can push the lifting block 333 downward, so that the lifting block 333 is elastically connected to the fixed slide seat 331.

[0048] Preferably, the upper surface of the lifting block 333 is provided with an anti-skid buffer pad 3334, and the anti-skid buffer pad 3334 is made of soft rubber. The upper surface of the anti-skid buffer pad 3334 is provided with anti-skid patterns. The anti-skid buffer pad 3334 can make the lifting block 333 fit the upper side wall of the borehole more closely, thereby improving the monitoring accuracy of rock formation stress changes. Moreover, the anti-skid buffer pad 3334 can increase the friction with the upper side wall of the borehole, thereby preventing the lifting block 333 and the upper side wall of the borehole from sliding relative to each other during the monitoring operation of the sensor, thereby affecting the accuracy of the monitoring data.

[0049] The outer side of the detection module 2 is wrapped with a waterproof cover 21. Fig.14 As shown, the waterproof cover 21 is made of rubber. The interior of the detection module 2 is provided with precision parts including optical fiber Bragg gratings, which are very sensitive to the corrosion interference of water. The waterproof cover 21 is put on the outside of the detection module 2. On the one hand, it can prevent moisture from penetrating into the detection module 2 and interfering with its normal use. On the other hand, it can also prevent the outer shell from rusting.

[0050] In order to make the lifting block 333 rise horizontally, see Figure 5-Figure 12The movable wedge block 332 includes a left wedge block 3321 and a right wedge block 3322. The left wedge block 3321 and the right wedge block 3322 are mirror-symmetrical. The left and right ends of the left wedge block 3321 and the right wedge block 3322 are used to lift the lifting block 333 at the same time to prevent the lifting block 333 from tilting, which makes it unable to fit tightly with the upper side of the inner wall of the borehole. The left and right ends of the upper surface of the fixed slide seat 331 are respectively provided with a sliding half groove 3311. The length of the sliding half groove 3311 is greater than the corresponding length of the left wedge block 3321 or the corresponding length of the right wedge block 3322, so that the left wedge block 3321 and the right wedge block 3322 can slide along the sliding half groove 3311.

[0051] Furthermore, the left wedge block 3321 and the right wedge block 3322 are both composed of an upper wedge-shaped portion 3323 and a lower sliding portion 3324, the cross-sectional shape of the sliding portion 3324 matches the cross-sectional shape of the sliding half-groove 3311, a threaded hole 3325 is provided in the middle of the sliding portion 3324, the threaded hole 3325 is provided along the length direction of the sliding portion 3324, the threaded screw 334 passes through the threaded hole 3325, the right side of the upper surface of the wedge-shaped portion 3323 of the left wedge block 3321 is tilted downward to form an inclination angle a, the size of the inclination angle a is 15-30 degrees, the left side of the upper surface of the wedge-shaped portion 3323 of the right wedge block 3322 is tilted downward to form an inclination angle b, the size of the inclination angle b is the same as the size of the inclination angle a.

[0052] A left wedge surface 3335 and a right wedge surface 3336 are respectively provided on the left and right sides of the bottom surface of the lifting block 333, the left end of the left wedge surface 3335 is tilted upward to form an inclination angle c, and the size of the inclination angle c is the same as the size of the inclination angle a, the right end of the right wedge surface 3336 is tilted upward to form an inclination angle d, and the size of the inclination angle d is the same as the size of the inclination angle b, the upper surfaces of the left wedge block 3321 and the right wedge block 3322 are in oblique contact with the left wedge surface 3335 and the right wedge surface 3336, when the threaded screw 334 drives the left wedge block 3321 and the right wedge block 3322 to move toward the middle at the same time, the movable wedge block 332 in oblique contact can lift the lifting block 333 with a smaller force.

[0053] In order to prevent the lifting block 333 and the movable wedge block 332 from accidentally shifting in position when the left wedge block 3321 and the right wedge block 3322 move toward the middle to squeeze and lift, the upper surface of the wedge-shaped portion 3323 is provided with a positioning groove 3326 arranged along the inclined surface, and the left wedge surface 3335 and the right wedge surface 3336 are provided with a raised positioning bar 3337 at the relative position of the positioning groove 3326. The positioning bar 3337 is inserted into the positioning groove 3326 to limit the lifting block 333 and the movable wedge block 332, so that the left wedge block 3321 and the right wedge block 3322 can only slide along the positioning groove 3326 with the lifting block 333.

[0054] The left wedge block 3321 and the right wedge block 3322 need to slide in the corresponding sliding half-groove 3311. If the position is not limited, the left wedge block 3321 and the right wedge block 3322 are at risk of falling out of the corresponding sliding half-groove 3311. Therefore, a limiting groove 3312 is provided on the side wall on the inner side of the sliding half-groove 3311. The limiting groove 3312 is provided along the setting direction of the sliding half-groove 3311. The sliding parts 3324 of the left wedge block 3321 and the right wedge block 3322 are provided with a raised limiting strip 3327 at the relative position of the limiting groove 3312. After the limiting strip 3327 is inserted into the corresponding limiting groove 3312, the left wedge block 3321 and the right wedge block 3322 can only slide left and right along the corresponding sliding half-groove 3311 and cannot fall out of the sliding half-groove 3311.

[0055] A through hole 3317 is provided between the sliding half grooves 3311 at the left and right ends of the fixed slide seat 331. The diameter of the through hole 3317 is larger than the diameter of the threaded screw 334 to prevent the through hole 3317 from rubbing against the threaded screw 334 and affecting the normal rotation of the threaded screw 334. The threaded screw 334 passes through the threaded hole 3325 of the left wedge block 3321, the through hole 3317 and the threaded hole 3325 of the right wedge block 3322 in sequence. The thread on the inner wall of the threaded hole 3325 of the left wedge block 3321 is opposite to the thread on the inner wall of the threaded hole 3325 of the right wedge block 3322, and the thread on the threaded screw 334 corresponds to it. When the threaded screw 334 rotates in a certain direction, under the engagement of the threads in the opposite rotation directions, the left wedge block 3321 and the right wedge block 3322 can move to both ends or to the middle at the same time.

[0056] In order to prevent the left wedge block 3321 and the right wedge block 3322 from sliding out of the opening on the side of the sliding half groove 3311, a left blocking piece 3313 is provided at the left opening of the sliding half groove 3311 at the left end, and a right blocking piece 3314 is provided at the right opening of the sliding half groove 3311 at the right end. A limiting hole 3316 is provided between the left blocking piece 3313 and the right blocking piece 3314. The threaded screw 334 includes a positioning section 3341 at the left end, The middle threaded section 3342 and the connecting section 3343 at the right end, the diameters of the positioning section 3341 and the connecting section 3343 are smaller than the diameter of the threaded section 3342, and match the diameter of the limiting hole 3316, so that the left baffle 3313 and the right baffle 3314 can not only prevent the left wedge block 3321 and the right wedge block 3322 from sliding out of the opening on the side of the sliding half groove 3311, but also provide support for the rotation of the threaded screw 334.

[0057] Preferably, the right baffle 3314 is provided with a connecting head 3315 at the position of the limiting hole 3316, and the connecting head 3315 is arranged on the opposite side of the right baffle 3314 facing the sliding half groove 3311, and the connecting section 3343 passes through the connecting head 3315, and the universal flexible shaft 34 includes a middle shaft core and a soft protective shell wrapped on the outside, and the fixed slide seat 331 is movably connected to the universal flexible shaft 34 through the connecting head 3315, and the connecting section 3343 is coaxially connected with the shaft core of the universal flexible shaft 34. Preferably, a connecting groove is provided at the top of the connecting section 3343, and the shape of the connecting groove is a cross, and a connecting pin is provided at a section where the shaft core of the universal flexible shaft 34 is connected to the connecting section 3343, and the shape of the connecting pin is the same as that of the connecting groove. The universal flexible shaft 34 and the driving crank 35 can be disassembled from the oil bag part 31 and carried separately. When in use, the universal flexible shaft 34 is connected to the connector 3315 of the fixed slide seat 331, and the shaft core of the universal flexible shaft 34 is coaxially connected to the threaded screw 334.

[0058] See also Fig.15 A fixed grip 341 is provided at one end of the universal flexible shaft 34 connected to the driving crank 35, and the fixed grip 341 includes a connecting tube 342, a finger ring 343 and a thumb ring 344. The universal flexible shaft 34 is fixed through the connecting tube 342, and the finger ring 343 is arranged along the outer side of the connecting tube 342. The middle of the finger ring 343 can accommodate four fingers other than the thumb to pass through and fix. The thumb ring 344 is arranged on the opposite side of the finger ring 343 and can accommodate a person's thumb to pass through. When the sensing module 3 is placed in place in the drill hole and the extension part 32 needs to be unfolded, the user's thumb passes through the thumb ring 344, and the other four fingers pass through the finger ring 343 to hold and fix the universal flexible shaft 34 to prevent the universal flexible shaft 34 from slipping in the user's hand when the driving crank 35 is rotated.

Claims

1. A waterproof mining optical fiber drilling stress sensor based on 5G fusion technology, used to detect changes in rock bearing stress in a borehole, comprising a control analysis module (1), a detection module (2) and a sensing module (3), wherein the sensing module (3) is arranged in the borehole and connected to the detection module (2) arranged outside the borehole through an oil pipe, the detection module (2) and the control analysis module (1) are connected through an optical cable, an optical fiber is arranged in the detection module (2), which can convert the pressure of the sensing module (3) into an optical signal and transmit it to the control analysis module (1), and the control analysis module (1) can analyze and convert the optical signal into a corresponding electrical signal, characterized in that: A mine safety data recording server is provided outside the mine, and the control analysis module (1) is connected to the safety data recording server through 5G fusion technology; The sensing module (3) comprises an oil bag portion (31) and an extension portion (32). The oil bag portion (31) is filled with hydraulic oil and is in the shape of a long strip. The capacity of the hydraulic oil in the oil bag portion (31) is kept constant, and the task of expanding and contacting with the inner wall of the borehole is completed by the extension portion (32). Therefore, the oil bag portion (31) does not need to be filled with hydraulic oil using additional equipment; The extension portion (32) comprises an extension unit (33), a universal flexible shaft (34) and a driving crank (35); the extension unit (33) comprises a fixed slide (331), a movable wedge block (332) and a lifting block (333); the lower surface of the fixed slide (331) is connected to the outer surface of the oil bag portion (31); the upper surface of the fixed slide (331) is elastically connected to the lifting block (333); the movable wedge block (332) is slidably connected between the fixed slide (331) and the lifting block (333); the upper surface of the movable wedge block (332) is an inclined surface, the bottom end of the inclined surface is placed toward the inner side of the fixed slide (331); The movable wedge block (332) and the lower surface of the lifting block (333) are connected in an inclined sliding manner. The middle of the movable wedge block (332) is threadedly connected with a threaded screw (334). The threaded screw (334) is arranged along the setting direction of the fixed slide seat (331). The threaded screw (334) can drive the movable wedge block (332) to slide along the setting direction of the fixed slide seat (331), so that the movable wedge block (332) can lift the lifting block (333) to contact the upper side of the inner wall of the drill hole. The threaded screw (334) is rotatably connected to the inner end of the universal flexible shaft (34), and the outer end of the universal flexible shaft (34) is rotatably connected to a driving crank (35); The outer side of the detection module (2) is wrapped with a waterproof cover (21), and the waterproof cover (21) is made of rubber.

2. According to claim 1, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: The movable wedge block (332) includes a left wedge block (3321) and a right wedge block (3322), and the left wedge block (3321) and the right wedge block (3322) are mirror-symmetrical. A sliding half groove (3311) is respectively provided at the left and right ends of the upper surface of the fixed slide seat (331), and the length of the sliding half groove (3311) is greater than the corresponding length of the left wedge block (3321) or the corresponding length of the right wedge block (3322).

3. According to claim 2, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: The left wedge block (3321) and the right wedge block (3322) are both composed of an upper wedge-shaped portion (3323) and a lower sliding portion (3324). The cross-sectional shape of the sliding portion (3324) matches the cross-sectional shape of the sliding half groove (3311). A threaded hole (3325) is provided in the middle of the sliding portion (3324). The threaded hole (3325) is provided along the length direction of the sliding portion (3324). The threaded screw (334) passes through the threaded hole (3325). The upper surface of the wedge-shaped portion (3323) of the left wedge block (3321) is tilted downward on the right side to form an inclination angle a, and the magnitude of the inclination angle a is 15-30 degrees. The upper surface of the wedge-shaped portion (3323) of the right wedge block (3322) is tilted downward on the left side to form an inclination angle b, and the magnitude of the inclination angle b is the same as the magnitude of the inclination angle a.

4. According to claim 3, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: A left wedge surface (3335) and a right wedge surface (3336) are respectively provided on the left and right sides of the bottom surface of the lifting block (333), the left end of the left wedge surface (3335) is tilted upward to form an inclination angle c, and the size of the inclination angle c is the same as the size of the inclination angle a, and the right end of the right wedge surface (3336) is tilted upward to form an inclination angle d, and the size of the inclination angle d is the same as the size of the inclination angle b.

5. According to claim 4, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: The upper surface of the wedge-shaped portion (3323) is provided with a positioning groove (3326) arranged along the inclined surface, and the left wedge surface (3335) and the right wedge surface (3336) are provided with raised positioning strips (3337) at relative positions of the positioning groove (3326).

6. According to claim 3, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: A limiting slide groove (3312) is arranged on the inner side wall of the sliding half groove (3311), and the limiting slide groove (3312) is arranged along the setting direction of the sliding half groove (3311). The sliding parts (3324) of the left wedge block (3321) and the right wedge block (3322) are provided with a raised limiting strip (3327) at the relative position of the limiting slide groove (3312).

7. According to claim 3, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: A through hole (3317) is provided between the sliding half grooves (3311) at the left and right ends of the fixed slide seat (331), and the diameter of the through hole (3317) is larger than the diameter of the threaded screw (334). The threaded screw (334) passes through the threaded hole (3325) of the left wedge block (3321), the through hole (3317) and the threaded hole (3325) of the right wedge block (3322) in sequence. The thread on the inner wall of the threaded hole (3325) of the left wedge block (3321) rotates in the opposite direction to the thread on the inner wall of the threaded hole (3325) of the right wedge block (3322), and the thread on the threaded screw (334) corresponds to it.

8. According to claim 7, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: A left baffle (3313) is provided at the left opening of the sliding half groove (3311) at the left end, and a right baffle (3314) is provided at the right opening of the sliding half groove (3311) at the right end. A limiting hole (3316) is provided in the middle of the left baffle (3313) and the right baffle (3314). The threaded screw (334) includes a positioning section (3341) at the left end, a threaded section (3342) in the middle, and a connecting section (3343) at the right end. The diameters of the positioning section (3341) and the connecting section (3343) are smaller than the diameter of the threaded section (3342) and match the diameter of the limiting hole (3316).

9. According to claim 8, a waterproof mining optical fiber drilling stress sensor based on 5G fusion technology is characterized in that: The right baffle (3314) is provided with a connector (3315) at the position of the limiting hole (3316); the connector (3315) is provided on the opposite side of the right baffle (3314) facing the sliding half groove (3311); the connecting section (3343) passes through the connector (3315); the universal flexible shaft (34) includes a central shaft core and a soft protective shell wrapped on the outside; the fixed slide seat (331) is connected to the universal flexible shaft (34) through the connector (3315); and the connecting section (3343) is coaxially connected to the shaft core of the universal flexible shaft (34).

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