NPR constant-resistance anchor rod pre-tightening force applying and real-time detecting device

Abstract

The invention relates to the field of anchor rod detection devices, and discloses an NPR constant-resistance anchor rod pre-tightening force applying and real-time detection device which comprises an anchor rod, and one end of the anchor rod is connected with a limiting head; the first sensor group is adhered to one end of the anchor rod, and one side of the first sensor group is connected with a wire wound on the anchor rod; the plurality of middle detectors are arranged at the thread of the anchor rod, and the two ends of each middle detector are connected with the wire; the calculation mechanism is connected to the end, away from the limiting head, of the anchor rod in a sleeving mode, and the calculation mechanism is connected with the end, close to the wire, of the anchor rod; according to the invention, multi-distance and multi-point monitoring can be realized, more accurate data can be obtained by cooperating with the work of the sensor group I and the like, the device can adapt to different anchor rods, the acquisition of multiple data is ensured, the stress of the anchor rods is ensured to be within a safe range, the safety of engineering is ensured, real-time monitoring is carried out, subsequent repeated operation is reduced, and the work is convenient to carry out.

Description

Technical Field

[0001] The invention relates to the field of anchor rod detection devices, and in particular to an NPR constant resistance anchor rod preload force application and real-time detection device. Background Art

[0002] Anchor cables have been widely used in the early warning and reinforcement of many slopes. After the anchor cables enter the rock mass, a certain preload force needs to be applied to them to ensure that their internal stress can protect their own safety during subsequent use, so as to achieve safer and longer-term use and further ensure the safety of the entire project.

[0003] In the process of applying the preload force of the anchor cable and anchor rod, the anchor cable and anchor rod are usually hit after the application is completed, and then the preload force is calculated and determined using the echo and instrument. When the value is not reached or exceeded, it is still necessary to operate and inspect again. The overall efficiency is low, and real-time monitoring cannot be performed, which affects subsequent use. Summary of the invention

[0004] In order to solve the technical problem of inconvenient measurement, the present invention provides a NPR constant resistance anchor rod preload application and real-time detection device.

[0005] The present invention is implemented by the following technical scheme: an NPR constant resistance anchor rod preload force application and real-time detection device, comprising: an anchor rod, one end of which is connected to a limiting head; a sensor group one, which is adhered to one end of the anchor rod, and one side of the sensor group one is connected to a wire wound around the anchor rod; a plurality of intermediate detectors, which are arranged at the thread of the anchor rod, and both ends of the intermediate detectors are connected to the wire; a calculation mechanism, which is sleeved on one end of the anchor rod away from the limiting head, and the calculation mechanism is connected to one end of the wire located close to the limiting head; a preload ring, which is sleeved on the anchor rod, one side of the preload ring is connected to a pressure sensor, and one side of the preload ring is connected to a contact platform connected to the calculation mechanism.

[0006] As a further improvement of the above solution, a through groove is provided on one side of the anchor rod, the wire is located in the through groove, a pressure sensor is connected to one side of the preload ring, and a cavity is provided in the contact platform.

[0007] As a further improvement of the above scheme, the computing mechanism includes: a chassis, which is socketed with the anchor rod, a battery pack is arranged in the chassis, a plurality of transfer devices are fixedly connected in the chassis, and the chassis is connected to the wire; an unfolding box, which is fixedly connected to one side of the chassis, an electrode sheet and a vibrator are connected in the unfolding box, the electrode sheet and the vibrator are connected to the anchor rod, and the electrical connection ends of the electrode sheet and the vibrator are connected to a flexible PLC located in the unfolding box; a sensor group 2, which is connected to the outer end of the anchor rod, the sensor group 2 is electrically connected to the flexible PLC, and the flexible PLC is electrically connected to the transfer device 1; a computing transmission component, which is arranged in the chassis.

[0008] As a further improvement of the above scheme, the computing and transmission component is an existing mechanism, which is composed of a mainboard, a processor, a memory, a signal transmitter, etc., and performs data computing and transmission. One side of the chassis is connected to a stabilizing sleeve that cooperates with the contact table, and one side of the chassis is provided with multiple electrical interfaces.

[0009] As a further improvement of the above scheme, the intermediate detector includes: an upper cover, a top of which is connected to a sensor group three, and a converter two connected to the sensor group three is fixedly connected in the middle of the upper cover; a lower cover, which is snap-fitted with the upper cover, a sensor group four is fixedly connected in the middle of the lower cover, and a microprocessor is electrically connected to the sensor group four; a limit rod, which is fixedly connected to the upper cover, and a pressing ring is fixedly connected to one end of the limit rod; a connecting unit, which is located in the lower cover, the connecting mechanism is connected to one end of the wire, and one end of the connecting mechanism is connected to the microprocessor; the connecting unit cooperates with the pressing ring.

[0010] As a further improvement of the above scheme, the connecting unit includes: a limiting sleeve, in which a spring is fixedly connected, the other end of the spring is connected to a movable frame slidably connected to the limiting sleeve, a diverter is connected to the movable frame, one end of the diverter is connected to a centralized cable connected to a microprocessor; a limiting frame, which is fixedly connected to the movable frame, a replacement sleeve is fixedly connected to the limiting frame, a plurality of plug-in tubes connected to the wires are fixedly connected to the replacement sleeve, a signal line is arranged in the plug-in tube, and an elastic ring matching the pressing ring is fixedly connected to one side of the limiting frame.

[0011] As a further improvement of the above scheme, the bottom of the limiting sleeve is fixedly connected with a clamping block clamped with the lower cover, one side of the lower cover is connected with an adjustment sleeve sleeved with the wire, the lower cover is provided with a through hole, and the upper cover is provided with a sealing sheet connected with the through hole.

[0012] As a further improvement of the above scheme, the upper cover and the lower cover both include an outermost plastic layer, in which a rubber layer, a fiber layer, an aluminum foil layer 1, a fiber mesh 1, a connecting layer, a fiber mesh 2 and a silicone layer 1 are sequentially connected, and a steel wire 2 and a steel wire 1 are respectively connected to the fiber mesh 2 and the fiber mesh 1.

[0013] As a further improvement of the above scheme, the conductive wire includes an outermost carbon fiber layer, in which a rubber ring, a fiber mesh three, an adhesive layer one, an aluminum foil layer three, an adhesive layer two, a fiber mesh four, a silicone ring, a fiber mesh five, an insulating layer and a power line are sequentially connected, and a plurality of steel wires three and steel wires four are respectively arranged in the fiber mesh three and the fiber mesh four, a plurality of protective layers are connected in the fiber mesh five, and a signal cable is connected in the protective layer.

[0014] As a further improvement of the above solution, an inert gas is provided in the gap between the upper cover and the lower cover, and a ventilation pipe is connected to one side of the lower cover.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the wires and intermediate detectors wound around the anchor rods, multi-distance and multi-point monitoring can be achieved. By cooperating with the work of the sensor group, more accurate data can be obtained. At the same time, it can adapt to different anchor rods and different tasks, ensure the collection of multiple data, ensure that the anchor rod force is within a safe range, ensure the safety of the project, and can perform real-time monitoring to reduce subsequent repeated operations and facilitate the progress of work.

[0017] 2. Through the cooperation of multiple devices in the chassis, different monitoring and data collection can be carried out in the subsequent work process. At the same time, the chassis can be unplugged to adapt to different work needs and ensure the progress of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a front cross-sectional schematic diagram of the present invention;

[0020] Figure 3 It is a right side cross-sectional schematic diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the main cross-sectional view of the intermediate detector;

[0022] Figure 5 It is a left view schematic diagram of the middle detector;

[0023] Figure 6 It is a schematic diagram of the structure of the intermediate detector;

[0024] Figure 7 for Figure 4 The enlarged structural diagram at A in the middle;

[0025] Figure 8 for Figure 7 The enlarged structural diagram at B in the middle;

[0026] Fig. 9 It is a schematic diagram of the upper cover and lower cover structure;

[0027] Fig.10 Schematic diagram of the conductor layer structure.

[0028] Description of main symbols:

[0029] 01. Anchor rod; 03. Limiting head; 04. Sensor group 1; 05. Wire; 06. Preload ring; 07. Pressure sensor; 08. Stabilizing sleeve; 09. Chassis; 11. Sensor group 2; 12. Deployment box; 13. Contact table; 14. Through slot; 15. Battery pack; 16. Electrode sheet; 17. Vibrator; 18. Flexible PLC; 19. Transfer device 1; 20. Intermediate detector; 21. Upper cover; 22. Sensor group 3; 23. Transfer device 2; 24. Limiting sleeve; 25. Centralized cable; 26. Microprocessor; 27. Sensor group 4; 28. Lower cover; 29. ​​Limiting rod; 30. Pressing ring; 31. Elastic ring; 32. Plug-in tube; 33. Limiting frame; 34 , moving frame; 35, spring; 36, shunt; 37, clamping block; 38, replacement sleeve; 39, signal line; 40, plastic layer; 41, rubber layer; 42, fiber layer; 43, aluminum foil layer one; 44, steel wire one; 45, fiber mesh one; 46, connecting layer; 47, steel wire two; 48, fiber mesh two; 49, silicone layer one; 50, carbon fiber layer; 51, aluminum foil layer two; 52, rubber ring; 53, fiber mesh three; 54, steel wire three; 55, adhesive layer one; 56, aluminum foil layer three; 57, adhesive layer two; 58, steel wire four; 59, fiber mesh four; 60, silicone ring; 61, fiber mesh five; 62, protective layer; 63, signal cable; 64, insulating layer; 65, power line. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0031] Example:

[0032] Please combine Figure 1-10 ,

[0033] An NPR constant resistance anchor rod preload force application and real-time detection device, comprising: an anchor rod 01, one end of the anchor rod 01 is connected to a limiting head 03, the anchor rod 01 is a constant resistance anchor rod, and performs main work, and in order to increase friction, it is generally provided with a spiral groove, and the limiting head 03 is an existing mechanism, and is used in conjunction with the sensor group 04, which is pasted on one end of the anchor rod 01, and one side of the sensor group 04 is connected to a wire 05 wound around the anchor rod 01, and the sensor group 04 performs sensing to realize the collection of electrical signals at the end and other required data, and an intermediate detector 20, which is provided with multiple, and its setting At the thread of the anchor rod 01, both ends of the intermediate detector 20 are connected to the wire 05. The intermediate detector 20 measures data at multiple points and transmits the data over long distances through the wire 05. The calculation mechanism is sleeved on the end of the anchor rod 01 away from the limiting head 03. The calculation mechanism is connected to the end of the wire 05 that is close to it. The calculation mechanism calculates the data and obtains the corresponding data, thereby ensuring subsequent analysis. The preload ring 06 is sleeved on the anchor rod 01. One side of the preload ring 06 is connected to a pressure sensor 07, and one side of the preload ring 06 is connected to a contact platform 13 connected to the calculation mechanism.

[0034] A through groove 14 is provided on one side of the anchor rod 01, and the conductor 05 is located in the through groove 14. A pressure sensor 07 is connected to one side of the preload ring 06. A cavity is provided in the contact platform 13. The through groove 14 ensures the subsequent extension of the conductor 05. The pressure sensor 07 assists in measuring the pressure between the preload ring 06 and the rock formation. One end of the pressure sensor 07 is connected to the calculation transmission component in the calculation mechanism through an electric wire.

[0035] The computing mechanism includes: a chassis 09, which is sleeved with the anchor rod 01, a battery pack 15 is arranged in the chassis 09, a plurality of transfer devices 19 are fixedly connected in the chassis 09, the chassis 09 is connected to the wire 05, the chassis 09 is overall limited and supported, the transfer device 19 is conveniently connected to the wire 05 to achieve data transmission and ensure subsequent data processing, an unfolding box 12, which is fixedly connected to one side of the chassis 09, an electrode sheet 16 and a vibrator 17 are connected in the unfolding box 12, the electrode sheet 16 and the vibrator 17 are connected to the anchor rod 01, the electrical connection ends of the electrode sheet 16 and the vibrator 17 are connected to a flexible PLC 18 located in the unfolding box 12, the electrode sheet 16 and the vibrator 17 are provided with power to And the generation of ultrasonic waves, which are then transmitted through the anchor rod 01 and received by the intermediate detector 20 and the sensor group 1 04, and then transmitted back to the chassis 09 through the wire 05 for calculation and storage, and the detection personnel collect and subsequently analyze. The sensor group 2 11 is connected to the outer end of the anchor rod 01, the sensor group 2 11 is electrically connected to the flexible PLC18, and the flexible PLC18 is electrically connected to the relay 19. The sensor group 2 11 receives data and obtains data for comparison with the intermediate detector 20 and the sensor group 1 04, performs certain noise reduction, and ensures the accuracy of the data. The calculation and transmission component is set in the chassis 09, and the calculation and transmission component performs calculation, storage and transmission.

[0036] The computing and transmission component is an existing mechanism, which is composed of a mainboard, a processor, a memory, a signal transmitter, etc., for computing and transmitting data. One side of the chassis 09 is connected to a stabilizing sleeve 08 that cooperates with the contact table 13. One side of the chassis 09 is provided with multiple electrical interfaces. After the preset computing system, the computing output is performed through the work of the hardware to ensure the progress of the work, and the stabilizing sleeve 08 performs auxiliary limitation.

[0037] The intermediate detector 20 includes: an upper cover 21, a sensor group 3 22 is connected to the top, a transfer device 23 connected to the sensor group 3 22 is fixedly connected in the middle of the upper cover 21, a lower cover 28 is snap-fitted with the upper cover 21, a sensor group 4 27 is fixedly connected in the middle of the lower cover 28, and a microprocessor 26 is electrically connected to the sensor group 4 27. The upper cover 21 cooperates with the lower cover 28 to form a closed space, and the data detected by the sensor group 3 22 can be transmitted to the microprocessor 26 through the transfer device 23, and the sensor group 4 27 detects The data is also transmitted to the microprocessor 26, and then transmitted to the wire 05 through the connecting unit to realize long-distance transmission. The limit rod 29 is fixedly connected to the upper cover 21, and one end of the limit rod 29 is fixedly connected to a pressing ring 30. The connecting unit is located in the lower cover 28. The connecting mechanism is connected to one end of the wire 05, and one end of the connecting mechanism is connected to the microprocessor 26; the connecting unit cooperates with the pressing ring 30, and the limit rod 29 cooperates with the pressing ring 30. When the upper cover 21 is installed, it squeezes the wire 05 to limit the wire 05 and the connecting unit.

[0038] The connection unit includes:

[0039] The limiting sleeve 24 has a spring 35 fixedly connected inside it, and the other end of the spring 35 is connected to a moving frame 34 that is slidably sleeved with the limiting sleeve 24. A diverter 36 is connected inside the moving frame 34, and one end of the diverter 36 is connected to a centralized cable 25 connected to the microprocessor 26. The limiting sleeve 24 is limited, and the spring 35 makes the moving frame 34 have a certain direction of forward movement. The limiting frame 33 is fixedly connected to the moving frame 34, and a replacement sleeve 38 is fixedly connected inside the limiting frame 33. A plurality of plug-in tubes 32 connected to the wire 05 are fixedly connected inside the replacement sleeve 38, and a signal line 39 is arranged in the plug-in tube 32. One side of the limiting frame 33 is fixedly connected to an elastic ring 31 that cooperates with the pressing ring 30. The limiting frame 33 is limited and expanded, and the plug-in tube 32 is connected to the wire 05 connection, and cooperate with the signal line 39 to realize power conduction. The top of the plug-in tube 32 is provided with a low-temperature melting conductive fiber. After installation, it is heated to melt it, thereby ensuring the stability of the conduction between the signal line 39 and the wire 05. The electrical signal is concentrated through the diverter 36 and then transmitted to the microprocessor 26 through the concentrated cable 25, and then further transmitted to the other wire 05 through the connection unit on the other side, so as to realize the cumulative transmission of the signal and obtain multiple data. During the heating process, the elastic ring 31 is welded with the outer side of the wire 05 to realize the connection. At the same time, it is limited by the pressing ring 30 and the limit rod 29 at the interface of the subsequent work to ensure the stability of the connection. One side of 36 is connected with a conductive wire connected to the power line 65.

[0040] The bottom of the limiting sleeve 24 is fixedly connected with a clamping block 37 clamped with the lower cover 28, one side of the lower cover 28 is connected with an adjusting sleeve sleeved with the wire 05, the lower cover 28 is provided with a through hole, and the upper cover 21 is provided with a sealing sheet connected to the through hole. The clamping block 37 is used for limiting and supporting, so that the force on the connecting port after connection is reduced. At the same time, one end of the wire 05 is limited by the adjusting sleeve and the sealing sheet, so as to further ensure the stability of the connecting port.

[0041] The upper cover 21 and the lower cover 28 both include an outermost plastic layer 40, to which a rubber layer 41, a fiber layer 42, an aluminum foil layer 43, a fiber mesh 45, a connecting layer 46, a fiber mesh 48 and a silicone layer 49 are sequentially connected, and steel wires 2 47 and 1 44 are respectively connected to the fiber mesh 48 and the fiber mesh 1 45. The plastic layer 40 ensures wear resistance, the rubber layer 41 provides waterproof protection, the fiber layer 42 provides fatigue strength, the aluminum foil layer 43 shields signals, the fiber mesh 1 45 and the fiber mesh 2 48 ensure flexibility and lubrication, the connecting layer 46 performs separation, the silicone layer 49 performs internal insulation and protection, and the steel wires 2 47 and 1 44 are in the fiber mesh 1 45 and the fiber mesh 2 48, which increase the strength of the entire upper cover 21 and the lower cover 28 and ensure the overall stability of the upper cover 21 and the lower cover 28.

[0042] The conductor 05 includes an outermost carbon fiber layer 50, in which a rubber ring 52, a fiber mesh 3 53, an adhesive layer 1 55, an aluminum foil layer 3 56, an adhesive layer 2 57, a fiber mesh 4 59, a silicone ring 60, a fiber mesh 5 61, an insulating layer 64 and a power line 65 are sequentially connected. A plurality of steel wires 3 54 and a plurality of steel wires 4 58 are respectively arranged in the fiber mesh 3 53 and the fiber mesh 4 59. A plurality of protective layers 62 are connected in the fiber mesh 5 61, and a signal cable 63 is connected in the protective layer 62. The carbon fiber layer 50 is made of flexible plastic material for protection and bonding. The rubber ring 52 is made of rubber material for further Isolation, aluminum foil layer two 51 performs the first layer of signal shielding, fiber mesh three 53 ensures partial expansion and contraction of steel wire three 54, steel wire three 54 provides longitudinal strength, adhesive layer one 55 performs bonding, aluminum foil layer three 56 performs secondary signal shielding, adhesive layer two 57 performs bonding, fiber mesh four 59 cooperates with steel wire four 58 to increase strength again, silicone ring 60 is made of silicone material, which isolates and performs internal buffering at the same time, fiber mesh five 61 uses mesh metal fiber, protective layer 62 performs external protection, signal cable 63 transmits electrical signals, insulating layer 64 performs insulation, and power line 65 provides external power.

[0043] Inert gas is provided in the gap between the upper cover 21 and the lower cover 28. A ventilation pipe is connected to one side of the lower cover 28, and the inert gas is introduced into the internal space through the ventilation pipe to ensure stable operation.

[0044] The implementation principle of the embodiment of the present application is:

[0045] Before starting work, select multiple intermediate detectors 20 and multiple wires 05 of different lengths as needed, and then connect the multiple intermediate detectors 20 through the wires 05 through the limitation of the pressing ring 30 and the limiting rod 29 and the connection between the plug-in tube 32 and the limiting rod 29. Then install the limiting sleeve 24 on the lower cover 28, and then install the upper cover 21 to make a sealed connection. At the same time, limit multiple devices to complete the preparation work.

[0046] Before inserting the anchor cable, stick the sensor group 04 to the top of the anchor rod 01, and wrap the wire 05 in a ring along the texture of the anchor cable. At the same time, let the intermediate detector 20 enter the texture and bond it to the anchor rod 01 through colloid when necessary to ensure subsequent measurements. Under the action of the outside world, the anchor rod 01 moves forward, so that the sensor group 04 and the wire 05 move along with the movement of the anchor rod 01. When reaching the position, install the preload ring 06 for preload, and then connect the wire 05 to the transferor 19 of the chassis 09, and then install the chassis 09 on the outside of the anchor rod 01, and then The vibrator 17, electrode sheet 16, sensor group 2 11, etc. are installed, the power is turned on, the initial data is obtained, and then the preload ring 06 is moved again to tighten the anchor rod 01 for the second time. At this time, the vibrator 17 and the electrode sheet 16 work to supply power and vibrate. The sensor group 1 04, sensor group 3 22, sensor group 4 27, and sensor group 2 11 synchronously detect the current in the anchor rod 01 and the ultrasonic transmission. The data is then preliminarily processed and integrated by the microprocessor 26, and then finally transmitted to the calculation unit through the wire 05, and then transmitted to the background equipment for real-time monitoring and calculation.

[0047] In the subsequent continuous work, the vibrator 17 and the electrode sheet 16 can cooperate with the sensor group 1 04, the sensor group 3 22, the sensor group 4 27, and the sensor group 2 11 to perform subsequent stress monitoring to ensure long-term monitoring of the entire project and improve the safety of the auxiliary project.

[0048] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A NPR constant resistance anchor preload application and real-time detection device, characterized in that: include: An anchor rod, one end of which is connected to a limiting head; A sensor group 1 is attached to one end of the anchor rod, and one side of the sensor group 1 is connected to a wire wound around the anchor rod; A plurality of intermediate detectors are provided, which are arranged at the thread of the anchor rod, and both ends of the intermediate detectors are connected to the wires; A calculation mechanism, which is sleeved on an end of the anchor rod away from the limiting head, and the calculation mechanism is connected to an end of the wire located close to the limiting head; A preload ring is sleeved on the anchor rod, one side of the preload ring is connected to a pressure sensor, and one side of the preload ring is connected to a contact platform connected to a computing mechanism.

2. The NPR constant resistance anchor rod preload application and real-time detection device according to claim 1, characterized in that: A through slot is arranged on one side of the anchor rod, the wire is located in the through slot, a pressure sensor is connected to one side of the preload ring, and a cavity is arranged in the contact platform.

3. The NPR constant resistance anchor preload application and real-time detection device according to claim 1, characterized in that: The calculation mechanism comprises: A chassis, which is sleeved with the anchor rod, a battery pack is arranged in the chassis, a plurality of transfer devices are fixedly connected in the chassis, and the chassis is connected with the wire; An unfolding box, which is fixedly connected to one side of the chassis, wherein an electrode sheet and a vibrator are connected inside the unfolding box, wherein the electrode sheet and the vibrator are connected to an anchor rod, and the electrical connection ends of the electrode sheet and the vibrator are connected to a flexible PLC located inside the unfolding box; A second sensor group is connected to the outer end of the anchor rod, the second sensor group is electrically connected to the flexible PLC, and the flexible PLC is electrically connected to the first transfer device; The computing transmission component is arranged in the chassis.

4. The NPR constant resistance anchor preload application and real-time detection device as claimed in claim 3, characterized in that: The computing and transmission component is an existing mechanism, which is composed of a mainboard, a processor, a memory, a signal transmitter, etc., and performs data computing and transmission. A stabilizing sleeve that cooperates with the contact table is connected to one side of the chassis, and a plurality of electrical interfaces are provided on one side of the chassis.

5. The NPR constant resistance anchor preload application and real-time detection device according to claim 1, characterized in that: The intermediate detector comprises: An upper cover, the top of which is connected to a sensor group 3, and the middle of the upper cover is fixedly connected to a relay 2 which is in communication with the sensor group 3; A lower cover is snap-connected with the upper cover, a sensor group 4 is fixedly connected in the middle of the lower cover, and a microprocessor is electrically connected to the sensor group 4; A limiting rod, which is fixedly connected to the upper cover, and one end of the limiting rod is fixedly connected to a pressing ring; The connection unit is located in the lower cover, the connection mechanism is connected to one end of the wire, and one end of the connection mechanism is connected to the microprocessor; the connection unit cooperates with the pressing ring.

6. The NPR constant resistance anchor preload application and real-time detection device as claimed in claim 5, characterized in that: The connecting unit comprises: A limiting sleeve, wherein a spring is fixedly connected inside the limiting sleeve, the other end of the spring is connected to a moving frame which is slidably sleeved with the limiting sleeve, the moving frame is connected to a shunt, and one end of the shunt is connected to a centralized cable connected to a microprocessor; A limiting frame is fixedly connected to the moving frame, a replacement sleeve is fixedly connected inside the limiting frame, a plurality of plug-in tubes connected to the wires are fixedly connected inside the replacement sleeve, signal lines are arranged inside the plug-in tubes, and an elastic ring matching the pressing ring is fixedly connected to one side of the limiting frame.

7. The NPR constant resistance anchor rod preload application and real-time detection device as claimed in claim 6, characterized in that: The bottom of the limiting sleeve is fixedly connected with a clamping block clamped with the lower cover, one side of the lower cover is connected with an adjustment sleeve sleeved with the wire, the lower cover is provided with a through hole, and the upper cover is provided with a sealing sheet connected with the through hole.

8. The NPR constant resistance anchor rod preload application and real-time detection device as claimed in claim 6, characterized in that: The upper cover and the lower cover both include an outermost plastic layer, in which a rubber layer, a fiber layer, an aluminum foil layer 1, a fiber mesh 1, a connecting layer, a fiber mesh 2 and a silicone layer 1 are sequentially connected, and a steel wire 2 and a steel wire 1 are respectively connected to the fiber mesh 2 and the fiber mesh 1.

9. The NPR constant resistance anchor preload application and real-time detection device as claimed in claim 6, characterized in that: The conductive wire includes an outermost carbon fiber layer, in which a rubber ring, a fiber mesh three, an adhesive layer one, an aluminum foil layer three, an adhesive layer two, a fiber mesh four, a silicone ring, a fiber mesh five, an insulating layer and a power line are sequentially connected, and a plurality of steel wires three and a plurality of steel wires four are respectively arranged in the fiber mesh three and the fiber mesh four, a plurality of protective layers are connected in the fiber mesh five, and a signal cable is connected in the protective layer.

10. The NPR constant resistance anchor preload application and real-time detection device according to claim 6, characterized in that: Inert gas is arranged in the gap between the upper cover and the lower cover, and a ventilation pipe is connected to one side of the lower cover.

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