A type of anchor dynamometer with grouting

Abstract

The present invention relates to the technical field of anchor dynamometers, and specifically to a through-grouting anchor dynamometer, comprising an anchor installed in a rock wall socket, a dynamometer installed on the anchor, a rock wall pressure-bearing mechanism installed on the anchor and arranged outside the rock wall socket, a chamber-making mechanism installed on the rock wall pressure-bearing mechanism, and a calibration protection mechanism installed on the chamber-making mechanism. By providing a stabilizing rock wall pressure-bearing mechanism on the dynamometer and anchor installation site, and installing the chamber-making mechanism and the calibration protection mechanism on the outside of the rock wall pressure-bearing mechanism, the safe environment created by the chamber-making mechanism and the calibration protection mechanism can provide effective protection for the dynamometer and the anchor pressure-bearing site to be tested, and a series of factors caused by being close to the rock wall can be directly blocked, so that the dynamometer can measure the dynamic pressure of the anchor and the rock mass in real time.

Description

Technical Field

[0001] The invention relates to the technical field of anchor dynamometers, in particular to a through-hole grouting type anchor dynamometer. Background Art

[0002] Anchor dynamometers are devices that mainly detect the tension and combined forces generated by rock wall vibrations. Mining anchors are the most popular and widely used.

[0003] Although anchor rods play a vital role in detecting the dynamic pressure action laws of mines, at present, anchor rods are mainly installed on the outside of the rock wall socket in conjunction with pads. However, after the dynamometer is fixed, it will be close to the rock wall. The rock wall will be affected by the resonance of the mining facilities and the interference of falling rock debris, which will affect the metal body and management of the dynamometer. At the same time, a convection layer is easily formed around the rock wall. Corrosive gases will rise along the rock wall and corrode the metal body of the dynamometer, thereby affecting its pressure measurement data.

[0004] In view of this, the present invention designs a through-hole grouting anchor dynamometer to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] To this end, the technical solution adopted in the present invention is:

[0007] A through-hole grouting anchor dynamometer, comprising an anchor installed in a rock wall socket, a dynamometer installed on the anchor, a rock wall pressure-bearing mechanism installed on the anchor and arranged outside the rock wall socket, a chamber-making mechanism installed on the rock wall pressure-bearing mechanism, and a calibration protection mechanism installed on the chamber-making mechanism; the rock wall pressure-bearing mechanism comprises a stabilizing pressure-bearing pad, two column heads installed on the pad, an energy supply component installed on the top of the pad, and a moisture-proof net arranged in a pipe at the bottom of the energy supply component; the chamber-making mechanism comprises a bottom outer cover arranged on the pad, an exhaust pipe installed on a notch at the bottom of the bottom outer cover, and a protection net installed inside the exhaust pipe and used to prevent upwelling dust; the calibration protection mechanism comprises a top outer cover installed on the bottom outer cover, a positioning pad installed inside the top outer cover, two partitions fixedly installed on the positioning pad, a first constant pressure rod penetrating into one of the partitions, and a second constant pressure rod penetrating into the other of the partitions;

[0008] In a preferred embodiment, the present invention can be further configured as follows: an inwardly recessed waterproof groove is provided on the base plate, and an extended insert is provided on one end of the base plate close to the rock wall;

[0009] A plurality of screw holes distributed in a circumference are provided on one side of the backing plate away from the rock wall.

[0010] In a preferred example, the present invention can be further configured as follows: the moisture-proof net is composed of an aluminum alloy storage bin, two filter screens installed at the top and bottom of the aluminum alloy storage bin, and a charcoal bag installed inside the aluminum alloy storage bin.

[0011] In a preferred example, the present invention can be further configured as follows: the rock wall pressure-bearing mechanism also includes a micro motor installed in the energy supply component, a wind cover installed on the energy supply component, and fan blades installed on the transmission shaft in the micro motor.

[0012] In a preferred example, the present invention can be further configured as follows: a first sealing ring is installed in the port of the bottom outer cover close to the gasket, and multiple end plates are fixedly installed on the outside of the bottom outer cover, and holes are opened inside the end plates, and locking bolts are provided in the holes, and the locking bolts are installed in the screw holes.

[0013] In a preferred embodiment, the present invention can be further configured as follows: a cable duct is installed in another notch at the bottom of the bottom outer cover, and a waterproof sleeve is installed in the bottom port of the cable duct;

[0014] The waterproof cover is made of rubber material, and a concave hole for guiding the dynamometer pipeline is opened inside the waterproof cover.

[0015] In a preferred embodiment, the present invention can be further configured as follows: a threaded notch is provided on the inner wall of the bottom outer cover at the other end away from the backing plate;

[0016] A threaded section is provided at the inner end of the top outer cover, and the threaded section is adapted to be installed in the threaded notch. Both the bottom outer cover and the top outer cover are made of stainless steel.

[0017] In a preferred example, the present invention may be further configured as follows: the calibration protection mechanism further includes a plurality of fastening bolts;

[0018] A plurality of end columns distributed in a circumference are fixedly mounted on the outer wall of the positioning pad. A plurality of grooves are provided on the outside of the top cover, and fastening bolts are passed through the grooves and connected to the end columns.

[0019] In a preferred embodiment, the present invention can be further configured as follows: a rubber sleeve and a second sealing ring provided between the top outer cover and the bottom outer cover are installed on the end of the positioning pad away from the bottom outer cover;

[0020] The rubber sleeve is made of silicone material and is used to compress the rod wall at the outer end of the anchor rod and to prevent water penetration.

[0021] In a preferred example, the present invention can be further configured as follows: the first constant pressure rod and the second constant pressure rod are both composed of a beam rod, a boost end and a hexagonal end, and the beam rod passes through the threaded end of the inner cavity of the bottom outer cover and is adapted to be installed in the column head.

[0022] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0023] 1. The present invention provides a stabilizing rock wall pressure-bearing mechanism at the installation site of the dynamometer and the anchor rod, and installs a chamber-making mechanism and a calibration protection mechanism on the outside of the rock wall pressure-bearing mechanism. In this way, the safe environment created by the chamber-making mechanism and the calibration protection mechanism can provide effective protection for the dynamometer and the anchor rod pressure-bearing parts to be tested, and a series of factors caused by proximity to the rock wall can be directly blocked, thereby realizing real-time measurement of the dynamic pressure of the anchor rod and the rock mass by the dynamometer.

[0024] 2. The present invention sets a directional and continuous downward exhaust flow component on the pad. As the external airflow is continuously attracted, the airflow after filtering and dehumidification flows in the cavity formed by the chamber-making mechanism and the calibration protection mechanism, and is finally discharged from the exhaust pipe. At this time, the dynamometer cooperates with the anchor rod to perform dynamic pressure detection on the rock mass, while avoiding interference with the convective gas from bottom to top along the rock wall. While reducing dust pollution, it can also avoid corrosion of the dynamometer metal layer by corrosive gas in a humid state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the present invention when in use;

[0026] Figure 2 Schematic diagram of the assembly of the anchor rod and the dynamometer of the present invention;

[0027] Figure 3 A schematic diagram of a part of the present invention;

[0028] Figure 4 Schematic cross-sectional view of the backing plate of the present invention;

[0029] Figure 5 For the present invention Figure 4 A magnified schematic diagram of point A in the middle;

[0030] Figure 6 Schematic diagram of the chamber-making mechanism of the present invention;

[0031] Figure 7 For the present invention Figure 6 A magnified schematic diagram of point B in the middle;

[0032] Figure 8 A schematic diagram of a calibration protection mechanism of the present invention;

[0033] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of point C in the middle.

[0034] Reference numerals:

[0035] 100. Anchor rod;

[0036] 200, dynamometer;

[0037] 300, rock wall pressure-bearing mechanism; 310, backing plate; 320, waterproof groove; 330, column head; 340, energy supply component; 350, wind cover; 360, micro motor; 370, fan blade; 380, moisture-proof net;

[0038] 400, chamber-building mechanism; 410, bottom cover; 420, end plate; 430, locking bolt; 440, first sealing ring; 450, exhaust pipe; 460, protective net; 470, cable duct; 480, waterproof cover;

[0039] 500, calibration protection mechanism; 510, top cover; 520, positioning pad; 530, partition; 540, first constant pressure rod; 550, second constant pressure rod; 560, rubber sleeve; 570, second sealing ring; 580, fastening bolt. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0041] It is to be understood that these descriptions are illustrative only and are not intended to limit the scope of the invention.

[0042] A through-hole grouting anchor dynamometer provided by some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0043] Example 1:

[0044] Combine Figures 1-9 As shown, the present invention provides a through-hole grouting anchor dynamometer, which includes an anchor 100 installed in a rock wall socket and a dynamometer 200 installed on the anchor 100, and is characterized in that it also includes a rock wall pressure-bearing mechanism 300 installed on the anchor 100 and arranged outside the rock wall socket, a chamber-making mechanism 400 installed on the rock wall pressure-bearing mechanism 300, and a calibration protection mechanism 500 installed on the chamber-making mechanism 400.

[0045] The rock wall pressure-bearing mechanism 300 includes a pad 310, a waterproof groove 320, a column head 330, an energy supply component 340, a wind cover 350, a micro motor 360, a fan blade 370 and a moisture-proof net 380. The chamber-making mechanism 400 includes a bottom outer cover 410, an end plate 420, a locking bolt 430, a first sealing ring 440, an exhaust pipe 450, a protective net 460, a cable tube 470 and a waterproof cover 480. The calibration protection mechanism 500 includes a top outer cover 510, a positioning pad 520, a partition 530, a first constant pressure rod 540, a second constant pressure rod 550, a rubber sleeve 560, a second sealing ring 570 and a fastening bolt 580.

[0046] The rock wall pressure-bearing mechanism 300 includes a stabilizing and pressure-bearing pad 310, two column heads 330 mounted on the pad 310, an energy supply assembly 340 mounted on top of the pad 310, a moisture-proof net 380 disposed in a pipe at the bottom of the energy supply assembly 340, a micro motor 360 mounted in the energy supply assembly 340, a wind cover 350 mounted on the energy supply assembly 340, and a fan blade 370 mounted on a drive shaft in the micro motor 360.

[0047] The chamber-making mechanism 400 includes a bottom cover 410 disposed on the backing plate 310, an exhaust pipe 450 installed on a notch at the bottom of the bottom cover 410, and a protective net 460 installed inside the exhaust pipe 450 to prevent upwelling dust.

[0048] The calibration protection mechanism 500 includes a plurality of fastening bolts 580, a top cover 510 mounted on the bottom cover 410, a positioning pad 520 mounted inside the top cover 510, two partitions 530 fixedly mounted on the positioning pad 520, a first constant pressure rod 540 extending through one of the partitions 530, and a second constant pressure rod 550 extending through the other of the partitions 530.

[0049] Since mining dynamometers are mainly installed on the outside of rock wall sockets in conjunction with anchor rods, and are used to detect the stress of coal seams or rock strata in underground coal mines, the surrounding rock stress of anchor roadways, and the support stress of scaffolding support roadways, the changes in the stress field inside the coal seams or rock strata on the roadway roof and the law of dynamic pressure action in the mining area are measured to detect and predict the changes in the internal stress of the rock mass in real time. However, the existing mining dynamometers are directly installed on the outer end of the anchor rod. During actual use, the corrosive gas, fallen gravel, and flammable and explosive dust generated near the rock wall will interfere with the use of the dynamometer. In severe cases, the continuous water infiltration accompanied by corrosive gas will cause corrosion to the dynamometer. At the same time, flammable and explosive factors will also cause safety hazards to the dynamometer.

[0050] When the dynamometer is used in conjunction with the anchor rod in the mine, the anchor rod and the pad 310 provided on the outside thereof are delivered toward the direction of the socket in the rock wall by using a drilling device, and the length of the pipe inside the pad 310 needs to be set according to the depth of the socket in the rock wall. When the pad 310 is inserted into the socket and fixed by the injected and solidified slurry, the dynamometer 200 acting on the outside of the pad 310 can perform real-time detection of the tensile stress generated by the rock mass in the safe environment formed by the bottom outer cover 410 and the top outer cover 510. At this time, the pad 310, the bottom outer cover 410 and the top cover 510 in the closed state can be used for The operation of the dynamometer 200 provides waterproof protection, and as the micro motor 360 runs, the driven and high-speed rotating fan blades 370 can suck the external airflow into the cavity formed by the bottom outer cover 410 and the top outer cover 510, and the airflow after being dehumidified by the moisture-proof net 380 can actively blow the air retained in the cavity outward, and finally the dust airflow flowing upward along the rock wall can be guided by the airflow discharged by the exhaust pipe 450. At this time, the dynamometer 200 can obtain dust-free protection. At this time, the dynamometer 200 can accurately measure and predict the tension and compression stresses inside the anchor rod and the rock mass in the cavity without interference from various factors.

[0051] Example 2:

[0052] Combine Figure 2 、 Figure 4 as well as Figure 8 As shown, based on Example 1, an inwardly recessed waterproof groove 320 is provided on the backing plate 310, and an extended insert is provided at one end of the backing plate 310 close to the rock wall;

[0053] The side of the backing plate 310 away from the rock wall is provided with a plurality of screw holes distributed in a circumferential manner. The length of the pipe from the backing plate 310 to the rock insertion hole is not unique. The length of the pipe at the inner end of the backing plate 310 can be lengthened in turn according to the state of the rock insertion hole.

[0054] The moisture-proof net 380 consists of an aluminum alloy storage bin, two filter screens installed at the top and bottom of the aluminum alloy storage bin, and a carbon bag installed inside the aluminum alloy storage bin.

[0055] By installing evenly distributed anchor rods in multiple sockets evenly distributed on the rock wall, and installing a dynamometer 200 for measurement on each anchor rod, the charcoal bag inside the moisture-proof net 380 can be replaced in a targeted manner according to the actual use environment. Especially in an environment where flammable and explosive gases are present, the moisture-proof net 380 can effectively pre-treat the inhaled air to ensure that there is no flammable and explosive air in the cavity formed by the bottom outer cover 410 and the top outer cover 510. At this time, the dynamometer 200 is ensured to operate safely in a complex environment while reducing the pollution caused by the dust airflow rising along the rock wall to the dynamometer 200.

[0056] Example 3:

[0057] Combine Figure 2-Figure 9 As shown, based on Example 1, a first sealing ring 440 is installed in the port of the bottom outer cover 410 close to the base plate 310, and multiple end plates 420 are fixedly installed on the outside of the bottom outer cover 410. The end plates 420 have holes formed inside, and locking bolts 430 are provided in the holes. The locking bolts 430 are installed in the screw holes.

[0058] A cable duct 470 and a waterproof cover 480 are installed in another notch at the bottom of the bottom outer cover 410;

[0059] The waterproof cover 480 is made of rubber material, and a recessed hole for guiding the pipeline of the dynamometer 200 is opened inside the waterproof cover 480;

[0060] A threaded notch is formed on the inner wall of the bottom cover 410 at the other end away from the backing plate 310 .

[0061] The combined bottom outer cover 410 and the end plate 420 are fixedly installed on the base plate 310 by using multiple locking bolts 430. At this time, the first sealing ring 440 can provide waterproof penetration protection for the bottom outer cover 410 and the waterproof groove 320. When the slurry poured into the rock wall socket is cured, the water outside the rock socket can be prevented from entering and soaking the anchor rod 100 and the dynamometer 200 through the gap between the base plate 310 and the bottom outer cover 410. In combination with the top outer cover 510 and the second sealing ring 570 to seal the outer end of the bottom outer cover 410, the clean cavity formed at this time can provide absolutely safe stress measurement for the dynamometer 200, thereby effectively preventing various factors outside the rock body from damaging the anchor rod 100 and the dynamometer 200.

[0062] Example 4:

[0063] Combine Figures 1-9 As shown, in the above embodiment, the outer wall of the positioning pad 520 is fixedly mounted with a plurality of end posts distributed in a circumference, the outer surface of the top cover 510 is provided with a plurality of grooves, and the fastening bolts 580 pass through the grooves and are connected to the end posts;

[0064] The inner end of the top cover 510 is provided with a threaded section, and the threaded section is adapted to be installed in the threaded notch. The bottom cover 410 and the top cover 510 are both made of stainless steel.

[0065] A rubber sleeve 560 and a second sealing ring 570 disposed between the top outer cover 510 and the bottom outer cover 410 are installed on the end of the positioning pad 520 away from the bottom outer cover 410;

[0066] The rubber sleeve 560 is made of a silicone material and is used to compress the rod wall at the outer end of the anchor rod 100 and prevent water penetration;

[0067] The first constant pressure rod 540 and the second constant pressure rod 550 are both composed of a beam rod, a booster end and a hexagonal end, and the threaded end of the beam rod passes through the inner cavity of the bottom outer cover 410 and is adapted to be installed in the column head 330.

[0068] The top outer cover 510 is used to press the rubber sleeve 560 onto the outer end of the positioning pad 520. At this time, the compressed rubber sleeve 560 can lock the rod wall of the outer end of the anchor rod 100. At this time, the outer end of the anchor rod 100 can be waterproofed when the rubber sleeve 560 is locked. At the same time, the first constant pressure rod 540 and the second constant pressure rod 550 that pass through the two partitions 530 can be fixed on the two column heads 330 to calibrate and adjust the installation position of the anchor rod 100 and the dynamometer 200 with the socket port of the rock wall. At this time, the anchor rod 100 is extended into the rock wall socket and filled with slurry to avoid the problem of shaking due to human interference.

[0069] The working principle and usage process of the present invention are as follows: the first sealing ring 440 is pre-installed between the bottom outer cover 410 and the waterproof groove 320, and the bottom outer cover 410 and the multiple end plates 420 are fixed to the outside of the base plate 310 using multiple locking bolts 430. At this time, the pipeline of the dynamometer 200 passes through the cable tube 470 to the outside, and the waterproof cover 480 is assembled on the pipeline of the dynamometer 200 and clamped into the port at the bottom of the cable tube 470. The protective net 46 installed in the exhaust pipe 450 0 will provide a heat exchange window for the inner cavity of the bottom outer cover 410, and use multiple fastening bolts 580 to fix the positioning pad 520 to the top outer cover 510. At this time, the inner cavity of the positioning pad 520 will provide pressurization protection for the outer end of the dynamometer 200. As the threaded section of the top outer cover 510 is assembled in the inner cavity of the bottom outer cover 410, the continuously contracting top outer cover 510 can cooperate with the bottom outer cover 410 to provide calibration protection for the outer end of the dynamometer 200 and the assembled dynamometer 200. At this time, the dynamometer 200 The working environment can be created by the combined top cover 510, bottom cover 410 and pad 310 to create a clean and safe environment with reduced interference from external factors. The rubber sleeve 560 installed at the outer end of the positioning pad 520 and penetrating to the outside of the top cover 510 will press the rod body of the dynamometer 200 under pressure. At this time, the safe environment created can reduce the diffusion of humid airflow around the dynamometer 200. Since the assembly end of the dynamometer 200 and the anchor rod 100 is set outside the rock wall socket, the use of The backing plate 310 serves as a pressure-bearing platform at the inner end of the dynamometer 200. The end tube inside the backing plate 310 is then inserted into the socket in the rock wall. When the micromotor 360 is running, the high-speed driven fan blades 370 draw the external airflow into the wind shield in the middle of the energy supply assembly 340. The airflow eventually flows along the wind shield and passes through the moisture-proof net 380 for dehumidification before entering the inner cavities of the top outer cover 510 and the bottom outer cover 410. At this point, the dynamometer 200, which is in one-way ventilation, can avoid interference from various factors around the rock wall.

[0070] During use, the drilling device is used to deliver the anchor rod 100 into the socket opened in the rock wall. After the anchor rod 100 is inserted into the socket of the rock wall, the grouting device can be used to pour slurry into the socket until the slurry solidifies. The anchor rod 100 can be fixed in the socket of the rock wall by the solidified slurry. At the same time, the end tube inside the pad 310 can be fixed by the slurry. When the load of the anchor rod 100 causes the steel cylinder to deform, the strain gauge in the dynamometer 200 deforms synchronously with the steel cylinder. The deformation causes the vibrating wire of the strain gauge in the dynamometer 200 to produce stress changes, thereby changing the vibration frequency of the vibrating wire. The electromagnetic coil excites the vibrating wire and measures its vibration frequency. The frequency signal is transmitted to the reading device via the cable, and the strain amount causing the deformation of the steel cylinder of the measuring anchor rod 100 can be measured, thereby avoiding the interference of external factors and timely feedback and detection of the vibration force of the rock wall tension.

[0071] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A through-hole grouting anchor dynamometer, comprising an anchor (100) installed in a rock wall socket and a dynamometer (200) installed on the anchor (100), characterized in that: It also includes a rock wall pressure-bearing mechanism (300) installed on the anchor rod (100) and arranged outside the rock wall insertion hole, a chamber-making mechanism (400) installed on the rock wall pressure-bearing mechanism (300), and a calibration protection mechanism (500) installed on the chamber-making mechanism (400); The rock wall pressure-bearing mechanism (300) comprises a stabilizing pressure-bearing pad (310), two column heads (330) mounted on the pad (310), an energy supply assembly (340) mounted on the top of the pad (310), a wind cover (350) mounted on the energy supply assembly (340), a micro motor (360) mounted in the energy supply assembly (340), a fan blade (370) mounted on a transmission shaft in the micro motor (360), and a moisture-proof net (380) arranged in a pipeline at the bottom of the energy supply assembly (340); The moisture-proof net (380) is composed of an aluminum alloy storage bin, two filter screens installed at the top and bottom of the aluminum alloy storage bin, and a carbon bag installed inside the aluminum alloy storage bin; The chamber-making mechanism (400) comprises a bottom-mounted outer cover (410) disposed on a backing plate (310), an exhaust pipe (450) mounted on a notch at the bottom of the bottom-mounted outer cover (410), a protective net (460) mounted inside the exhaust pipe (450) and used to prevent upwelling dust, a cable duct (470) mounted in another notch at the bottom of the bottom-mounted outer cover (410), and a waterproof sleeve (480) mounted in a bottom port of the cable duct (470); The pipeline of the dynamometer (200) passes through the cable duct (470) outward, and the waterproof cover (480) is assembled on the pipeline of the dynamometer (200) and clamped in a port at the bottom of the cable duct (470); The waterproof cover (480) is made of a rubber material, and a concave hole for guiding the pipeline of the dynamometer (200) is provided inside the waterproof cover (480); The calibration protection mechanism (500) comprises a top cover (510) mounted on the bottom cover (410), a positioning pad (520) mounted inside the top cover (510), two partitions (530) fixedly mounted on the positioning pad (520), a first constant pressure rod (540) penetrating into one of the partitions (530), a second constant pressure rod (550) penetrating into the other of the partitions (530), and a second sealing ring (570) arranged between the top cover (510) and the bottom cover (410); When the micro motor (360) is running, the fan blades (370) driven at high speed will draw the external airflow into the wind shield in the middle of the energy supply component (340), and finally enter the inner cavity of the top outer cover (510) and the bottom outer cover (410) along the wind shield and after dehumidification treatment by the moisture-proof net (380). At this time, the dynamometer (200) under one-way ventilation can avoid being disturbed by various factors around the rock wall. When the slurry poured into the rock wall plug hole is solidified, the water outside the rock body plug hole can avoid entering and soaking the anchor rod (100) and the dynamometer (200) through the gap between the pad (310) and the bottom outer cover (410). In combination with the sealing of the top outer cover (510) and the second sealing ring (570) on the outer end of the bottom outer cover (410), the clean cavity formed at this time can provide absolutely safe stress measurement for the dynamometer (200).

2. A through-hole grouting anchor dynamometer according to claim 1, characterized in that: The backing plate (310) is provided with an inwardly recessed waterproof groove (320), and an extended insert is provided at one end of the backing plate (310) close to the rock wall; A plurality of screw holes distributed in a circumference are formed on a side of the pad (310) away from the rock wall.

3. The through-hole grouting anchor dynamometer according to claim 1, characterized in that: A first sealing ring (440) is installed in a port of the bottom outer cover (410) close to the backing plate (310), and a plurality of end plates (420) are fixedly installed outside the bottom outer cover (410).

4. The through-hole grouting anchor dynamometer according to claim 1, characterized in that: A threaded notch is formed on the inner wall of the other end of the bottom outer cover (410) away from the backing plate (310); The inner end of the top outer cover (510) is provided with a threaded section, and the threaded section is adapted to be installed in the threaded notch. The bottom outer cover (410) and the top outer cover (510) are both made of stainless steel.

5. The through-hole grouting anchor dynamometer according to claim 1, characterized in that: The calibration protection mechanism (500) further comprises a plurality of fastening bolts (580); The outer wall of the positioning pad (520) is fixedly mounted with a plurality of end columns distributed in a circumference, and the outer surface of the top cover (510) is provided with a plurality of grooves, and the fastening bolts (580) penetrate into the grooves and are connected to the end columns.

6. The through-hole grouting anchor dynamometer according to claim 1, characterized in that: A rubber sleeve (560) is installed on the end of the positioning pad (520) away from the bottom outer cover (410); The rubber sleeve (560) is made of a silicone material, and is used to compress the rod wall at the outer end of the anchor rod (100) and to prevent water penetration.

7. The through-hole grouting anchor dynamometer according to claim 1, characterized in that: The first constant pressure rod (540) and the second constant pressure rod (550) are both composed of a beam rod, a pressure boosting end and a hexagonal end, and the threaded end of the beam rod that passes through the inner cavity of the bottom outer cover (410) is adapted to be installed in the column head (330).

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