Anchoring box with non-destructive testing function

Abstract

The application discloses an anchor box with a nondestructive testing function, and relates to the technical field of anchor rod supporting equipment, which comprises a shell, the shell being fixedly connected with a drilling frame; a transmission shaft, which is supported and installed in the shell through a bearing; a driving device, which is fixed on the drilling frame and is used for driving the transmission shaft to rotate; a first end of the transmission shaft is connected with an output shaft of the driving device, and a second end of the transmission shaft is used for being circumferentially connected with an anchor rod; an acceleration sensor, which is arranged in a blind hole at the second end of the transmission shaft and is close to the second end of the transmission shaft; a slip ring, which is a via-hole type conductive slip ring, a rotor of the slip ring is fixedly sleeved on the transmission shaft, and a stator of the slip ring is fixedly connected with the shell; a signal transmission line of the acceleration sensor passes through a side wall of the transmission shaft and is electrically connected with a signal acquisition unit through the conductive slip ring; and a vibration exciting mechanism, which is used for knocking the anchor rod. The anchor box can nondestructively test the anchor rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchor rod supporting equipment, in particular to an anchor box with nondestructive testing function. BACKGROUND

[0002] After the anchor rod supporting is completed, the artificial sampling nondestructive testing of the anchor rod is the main detection means for judging the roadway anchor supporting effect.

[0003] With the development of automation and intelligence, the mechanization of the installation of the anchor rod in the coal mine has become an inevitable trend, wherein the anchor box is an execution device for the mechanized installation of the anchor rod.

[0004] In the mechanized installation operation, whether the installation effect of each anchor rod meets the supporting requirements lacks judgment basis and data support, and further has safety hazards.

[0005] For the anchor rod installed by the mechanization in the coal mine, the traditional artificial detection method relies on the sampling sample to analyze the anchor rod supporting effect, the small sample quantity results in deviation, the increase of the sample quantity increases the manpower and material resources, and the same anchor rod is detected for multiple times or different anchor rods in the same group are detected, and the excitation energy cannot be consistent and controllable. SUMMARY

[0006] The purpose of the present application is to provide an anchor box with nondestructive testing function to solve the problems existing in the prior art, and to use the anchor box to nondestructively test the anchor rod on the basis of the mechanized installation of the anchor rod by the anchor box.

[0007] To achieve the above purpose, the present application provides the following scheme:

[0008] The present application provides an anchor box with nondestructive testing function, comprising:

[0009] A shell is fixedly connected with a drilling frame;

[0010] A transmission shaft is supported and installed in the shell through a bearing;

[0011] A driving device is fixed on the drilling frame, and is used for driving the transmission shaft to rotate; a first end of the transmission shaft is connected with an output shaft of the driving device, and a second end of the transmission shaft is used for circumferentially clamping a nut at an end of the anchor rod;

[0012] An acceleration sensor is arranged in a blind hole at the second end of the transmission shaft, and is close to the second end of the transmission shaft;

[0013] A slip ring, which is a via-hole type conductive slip ring, a rotor fixing sleeve of the slip ring is fixed on the transmission shaft, and a stator of the slip ring is fixedly connected with the shell; a signal transmission line of the acceleration sensor passes through a side wall of the transmission shaft and is electrically connected with the signal acquisition unit through the conductive slip ring;

[0014] A vibration excitation mechanism for knocking the anchor rod.

[0015] Preferably, the vibration excitation mechanism comprises a sleeve, a magnetic yoke, a first magnetic ring, a second magnetic ring, a passive gear, a first connecting rod, a vibration hammer and a explosion-proof motor, the sleeve is slidingly sleeved on the transmission shaft, the magnetic yoke is fixedly sleeved on the sleeve, the first magnetic ring and the second magnetic ring are both located between the magnetic yoke and the sleeve, and the magnetic poles of the first magnetic ring and the second magnetic ring are both distributed in the circumferential direction; the second magnetic ring can rotate in the circumferential direction relative to the sleeve, the passive gear is fixedly connected with the second magnetic ring, the passive gear can be engaged with a driving gear, the driving gear is fixedly arranged on an output shaft of the explosion-proof motor, and the driving gear is fixedly connected with the shell; the first connecting rod is connected with the magnetic yoke through a spring, the vibration hammer is fixedly arranged at the center of the side of the first connecting rod away from the magnetic yoke, and the vibration hammer is used for knocking the anchor rod; the first connecting rod passes through the transmission shaft, the vibration hammer is located in the hollow portion of the transmission shaft, the side wall of the transmission shaft is provided with a first sliding groove in the axial direction corresponding to the first connecting rod, and the first connecting rod is slidingly matched with the first sliding groove.

[0016] Preferably, the hydraulic cylinder is further arranged for driving the sleeve to slide in the axial direction of the transmission shaft; one end of a second connecting rod is fixedly connected with a hydraulic rod of the hydraulic cylinder, a sleeve ring is fixedly arranged at the other end of the second connecting rod, the sleeve ring is sleeved on the sleeve, and an annular space is formed between the sleeve ring and the sleeve; a limiting ring is fixedly arranged on the sleeve, the sleeve ring is located between the limiting ring and the passive gear; the space between the limiting ring and the passive gear is equal to the axial length of the sleeve ring; the shell is divided into two parts, a first space is formed between the two parts of the shell, and the two parts of the shell are fixedly connected through a connecting shell; the passive gear and the second connecting rod can slide in the first space.

[0017] Preferably, a partition ring is arranged between the first magnetic ring and the second magnetic ring, and the partition ring is made of a non-magnetic conductive material.

[0018] Preferably, a fixing seat is further arranged, the fixing seat is fixedly connected with an anchor box support seat on the drilling rig, and one end of the shell is threadedly connected with the fixing seat.

[0019] Preferably, a sensor mounting seat corresponding to the acceleration sensor is arranged in the blind hole, and the acceleration sensor is fixed on the sensor mounting seat.

[0020] Preferably, the acceleration sensor and the signal transmission line of the acceleration sensor are sealed by sealing glue respectively.

[0021] Preferably, the driving device is a hydraulic motor.

[0022] The present application has the following technical effects relative to the prior art:

[0023] The anchor box with the nondestructive testing function can mechanically install anchor rods and nondestructively test the anchor rods. When the anchor box with the nondestructive testing function is used to test the same anchor rod multiple times or different anchor rods, the excitation energy is consistent and controllable, the accuracy of the anchor rod installation effect detection is improved, a judgment basis for the mechanical anchor rod installation effect is provided, and the number of anchor rod nondestructive testing samples is increased to provide data support for roadway support analysis.

[0024] Further, the first magnetic ring and the second magnetic ring in the present application are both permanent magnets, which have low maintenance and explosion-proof requirements and are suitable for mine roadway working environments. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0026] Figure 1 FIG. 1 is a structural schematic diagram of the anchor box with the nondestructive testing function of the present application;

[0027] Figure 2 FIG. 2 is a structural schematic diagram of the excitation mechanism in the anchor box with the nondestructive testing function of the present application;

[0028] Figure 3 FIG. 3 is a schematic diagram of the knocking state of the excitation mechanism in the anchor box with the nondestructive testing function of the present application;

[0029] Figure 4 FIG. 4 is a schematic diagram of the stopping knocking state of the excitation mechanism in the anchor box with the nondestructive testing function of the present application;

[0030] Figure 5 FIG. 5 is a connection schematic diagram of the anchor box with the nondestructive testing function of the present application and the anchor rod;

[0031] The components are as follows: 1. Housing; 2. Explosion-proof motor; 3. Slip ring; 4. Fixing base; 5. Hydraulic motor; 6. Drive shaft; 7. Hydraulic cylinder; 8. Second connecting rod; 9. Sleeve; 10. First collar; 11. Vibration hammer; 12. First connecting rod; 13. First magnetic ring; 14. Second magnetic ring; 15. Driving gear; 16. Driven gear; 17. Magnetic yoke; 18. Spacer ring; 19. Spring; 20. Anchor bolt; 21. Nut; 22. Connecting shell; 23. Second collar; 24. Collar; 25. Limiting ring; 26. Sensor mounting base. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The purpose of this invention is to provide an anchor box with non-destructive testing capabilities to solve the problems existing in the prior art. Based on the mechanized installation of anchor bolts through the anchor box, the anchor box is used to perform non-destructive testing on the anchor bolts.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1 to 5 As shown, this embodiment provides an anchor box with non-destructive testing function, including a shell 1, a transmission shaft 6, a drive device, a vibration excitation mechanism, and a vibration pickup unit.

[0036] In this embodiment, a fixing seat 4 is also included. The fixing seat 4 is fixedly connected to the anchor box support seat on the drill frame. One end of the housing 1 extends into the fixing seat 4 and is threadedly connected to the fixing seat 4.

[0037] The drive shaft 6 is mounted inside the housing 1 with bearing support; specifically, a first collar 10 and a second collar 23 are fixed in the housing 1. Figure 1 The outer ring of the bearing at the left end of the middle housing 1 is sandwiched between the housing 1 and the left end of the first collar 10. Figure 1 One side of the inner ring of the bearing at the left end of the middle housing 1 is fixedly connected to the drive shaft 6; Figure 1 The outer ring of the bearing at the right end of the housing 1 abuts against the right end of the second collar 23, the right side of the inner ring of the bearing at the right end of the housing 1 abuts against the shoulder on the drive shaft 6, and the outer ring of the bearing at the right end of the housing 1 is fixedly connected to the housing 1, and the inner ring of the bearing at the right end of the housing 1 is fixedly connected to the drive shaft 6.

[0038] The drive unit is fixed on the drill frame and is used to drive the transmission shaft 6 to rotate; the first end of the transmission shaft 6 (i.e. Figure 1 The right end of the transmission shaft 6 is connected to the output shaft of the drive unit, and the second end of the transmission shaft 6 (i.e., the right end of the transmission shaft 6) is connected to the output shaft of the drive unit. Figure 1 The left end of the anchor box is used to circumferentially engage with the nut 21 at the end of the anchor rod 20, and the nut 21 at the end of the anchor rod 20 is coaxial with the anchor rod 20. In this embodiment, a hydraulic motor 5 is used as the driving device. It should be noted that the anchor box with non-destructive testing function in this embodiment can complete both the installation and testing of the anchor rod 20; before the anchor rod 20 is tested, the anchor rod 20 has been installed in the borehole, and the position of the anchor rod 20 is fixed, and it will not move in any direction. The connection between the anchor rod 20 and the anchor box is as follows: Figure 5 As shown, the circumferential clamping is mainly used in the installation of the anchor rod 20. It is connected with the nut 21 on the anchor rod 20 to drive the anchor rod 20 to rotate at high speed for installation. The excitation and vibration pickup operation is used in the inspection of the anchor rod 20. At this time, the anchor rod 20 is fixed and there is no movement. Therefore, the second end of the drive shaft 6 does not need to be axially clamped with the anchor rod 20.

[0039] The vibration mechanism is used to strike the anchor bolt 20 to generate stress waves. In this embodiment, the vibration mechanism specifically includes a sleeve 9, a magnetic yoke 17, a first magnetic ring 13, a second magnetic ring 14, a driven gear 16, a first connecting rod 12, a vibration hammer 11, and an explosion-proof motor 2; the sleeve 9 is slidably sleeved on the transmission shaft 6, the magnetic yoke 17 is fixedly sleeved on the sleeve 9, the first magnetic ring 13 and the second magnetic ring 14 are both located between the magnetic yoke 17 and the sleeve 9, and the magnetic poles of the first magnetic ring 13 and the second magnetic ring 14 are both distributed circumferentially; the second magnetic ring 14 can rotate circumferentially relative to the sleeve 9, the driven gear 16 is fixedly connected to the second magnetic ring 14, and the driven gear... Wheel 16 can mesh with drive gear 15, drive gear 15 is fixed on the output shaft of explosion-proof motor 2, and drive gear 15 is fixed to housing 1; first connecting rod 12 is connected to magnetic yoke 17 through spring 19, and excitation hammer 11 is fixed at the center of the side of first connecting rod 12 away from magnetic yoke 17. Excitation hammer 11 is used to strike anchor rod 20; first connecting rod 12 passes through drive shaft 6, excitation hammer is located in the hollow part of drive shaft 6, and the side wall of drive shaft 6 is provided with axial first sliding groove corresponding to first connecting rod 12. First connecting rod 12 slides in cooperation with first sliding groove.

[0040] In the embodiment, the exciting mechanism further comprises a hydraulic cylinder 7 for driving the sleeve 9 to slide along the axis of the transmission shaft 6, the hydraulic cylinder 7 has a hydraulic rod, one end of a second connecting rod 8 is fixedly connected to the hydraulic rod, the other end of the second connecting rod 8 is fixedly provided with a sleeve ring 24, the sleeve ring 24 is sleeved on the sleeve 9, and the sleeve ring 24 has an annular gap with the sleeve 9; the sleeve 9 is fixedly provided with a limiting ring 25, the sleeve ring 24 is located between the limiting ring 25 and the driven gear 16; the gap between the limiting ring 25 and the driven gear 16 is equal to the axial length of the sleeve ring 24; the shell 1 is divided into two parts, a first gap is formed between the two parts of the shell 1, and the two parts of the shell 1 are fixedly connected through a connecting shell 22; the driven gear 16 and the second connecting rod 8 can slide in the first gap; when the hydraulic cylinder 7 works, the sleeve 9 can be driven by the second connecting rod 8 and the sleeve ring 24 to slide along the axis of the transmission shaft 6.

[0041] A spacer ring 18 is arranged between the first magnetic ring 13 and the second magnetic ring 14, and the spacer ring 18 is made of a non-magnetic material.

[0042] The specific working principle of the exciting mechanism is as follows:

[0043] When the anchor rod 20 is installed, the hydraulic cylinder 7 is retracted, so that the driven gear 16 is disengaged from the driving gear 15 and no longer meshes, and the movement state of the driven gear 16 does not affect the driving gear 15; after the anchor rod 20 is installed, the hydraulic cylinder 7 is extended, the driven gear 16 meshes with the driving gear 15 to excite, the driving gear 15 drives the driven gear 16 to rotate, the driven gear 16 drives the second magnetic ring 14 to rotate, the magnetic pole circumferential position of the second magnetic ring 14 is changed, and the knocking of the exciting hammer 11 on the anchor rod 20 is stopped.

[0044] Specifically, the switching of the working state of the exciting hammer 11 is realized by the change of the magnetic pole circumferential position of the second magnetic ring 14, when the exciting mechanism reaches the working position, the exciting hammer 11 is in a stopped state, at this time, the N pole of the second magnetic ring 14 is opposite to the N pole of the first magnetic ring 13, and the S pole of the second magnetic ring 14 is opposite to the S pole of the first magnetic ring 13, at this time, the second magnetic ring 14 and the system magnetic circuit are as shown in Figure 4 Most of the magnetic lines of force pass through the connecting rod, and the loop of the magnetic lines of force is: the N pole of the first magnetic ring 13→ the yoke 17→ the connecting rod→ the S pole of the first magnetic ring 13→ the N pole of the first magnetic ring 13, so that the connecting rod and the exciting hammer 11 are firmly adsorbed and fixed; when the exciting hammer 11 works, the driving gear 15 drives the driven gear 16 to rotate rapidly, the magnetic pole position of the second magnetic ring 14 changes, the N pole of the second magnetic ring 14 is opposite to the S pole of the first magnetic ring 13, and the S pole of the second magnetic ring 14 is opposite to the N pole of the first magnetic ring 13, the second magnetic ring 14 and the system magnetic circuit are as shown in Figure 3As shown, the second loop is a closed loop formed by the magnetic lines in the system: the N pole of the first magnetic ring 13→ the S pole of the first magnetic ring 13→ the magnetic yoke 17→ the N pole of the second magnetic ring 14→ the S pole of the second magnetic ring 14→ the magnetic yoke 17→ the N pole of the first magnetic ring 13, and no magnetic lines pass through the surface of the connecting rod, so that no suction force is generated on the connecting rod, and under the elastic force of the spring 19, the excitation hammer 11 knocks the anchor rod 20 to generate stress waves.

[0045] The acceleration sensor is arranged in the blind hole at the second end of the transmission shaft 6, and the acceleration sensor is close to the second end of the transmission shaft 6; in this embodiment, the acceleration sensor is an IEPE acceleration sensor.

[0046] The slip ring 3 is a through-hole type conductive slip ring 3, the rotor fixing sleeve of the slip ring 3 is arranged on the transmission shaft 6, and the stator of the slip ring 3 is fixedly connected with the shell 1; the signal transmission line of the acceleration sensor passes through the side wall of the transmission shaft 6 and is electrically connected with the signal acquisition unit through the conductive slip ring 3.

[0047] In this embodiment, a sensor mounting seat 26 is arranged in the blind hole corresponding to the acceleration sensor, and the acceleration sensor is fixedly arranged on the sensor mounting seat 26.

[0048] The acceleration sensor and the signal transmission line of the acceleration sensor are respectively sealed by sealing glue after installation.

[0049] When the anchor rod 20 is installed by using the anchor box with the nondestructive testing function, only the second end of the transmission shaft 6 needs to be circumferentially connected with the anchor rod 20, the passive gear 16 needs to be disengaged from the meshing with the driving gear 15, then the transmission shaft 6 is driven to rotate by the hydraulic motor 5, the transmission shaft 6 drives the anchor rod 20 to rotate, so that the installation of the anchor rod 20 is completed.

[0050] After the installation of the anchor rod 20 is completed, the excitation hammer 11 in the excitation mechanism is excited to work and knock the anchor rod 20 to generate stress waves, the acceleration sensor collects the vibration condition of the anchor rod 20 and feeds back to the signal acquisition unit, the signal acquisition unit feeds back the signal of the acceleration sensor to the host computer or computer equipment and the like for analysis to determine whether the installation effect of the anchor rod 20 meets the requirements.

[0051] In the description of the present application, it should be noted that, in addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0052] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. An anchor box with non-destructive testing function, characterized in that, include: A housing, which is fixedly connected to the drill frame; A drive shaft, which is mounted inside the housing by bearing support; A drive device is fixed on the drill frame and is used to drive the transmission shaft to rotate; the first end of the transmission shaft is connected to the output shaft of the drive device, and the second end of the transmission shaft is used to circumferentially engage with the nut at the end of the anchor rod. An acceleration sensor is disposed in a blind hole at the second end of the drive shaft, and the acceleration sensor is located near the second end of the drive shaft; The slip ring is a through-hole conductive slip ring. The rotor of the slip ring is fixedly sleeved on the drive shaft, and the stator of the slip ring is fixedly connected to the housing. The signal transmission line of the acceleration sensor passes through the side wall of the drive shaft and is electrically connected to the signal acquisition unit through the conductive slip ring. A vibration mechanism for striking the anchor bolt; The vibration excitation mechanism includes a sleeve, a magnetic yoke, a first magnetic ring, a second magnetic ring, a driven gear, a first connecting rod, a vibration hammer, and an explosion-proof motor. The sleeve is slidably fitted onto the transmission shaft, and the magnetic yoke is fixedly fitted onto the sleeve. The first and second magnetic rings are both located between the magnetic yoke and the sleeve, with the magnetic poles of both rings distributed circumferentially. The second magnetic ring can rotate circumferentially relative to the sleeve. The driven gear is fixedly connected to the second magnetic ring and can mesh with the driving gear. The driving gear is fixedly mounted on the output shaft of the explosion-proof motor and is fixedly connected to the housing. The first connecting rod is connected to the magnetic yoke via a spring. The vibration hammer is fixed at the center of the first connecting rod on the side away from the magnetic yoke and is used to strike the anchor bolt. The first connecting rod passes through the transmission shaft, and the vibration hammer is located within the hollow portion of the transmission shaft. The sleeve is provided with an axial first sliding groove on the side wall corresponding to the first connecting rod, and the first connecting rod slides in cooperation with the first sliding groove; it also includes a hydraulic cylinder, which is used to drive the sleeve to slide along the axial direction of the transmission shaft; one end of the hydraulic rod of the hydraulic cylinder is fixedly connected to the second connecting rod, and the other end of the second connecting rod is fixedly provided with a collar, which is sleeved on the sleeve, and there is an annular gap between the collar and the sleeve; a limiting ring is fixedly provided on the sleeve, and the collar is located between the limiting ring and the driven gear; the gap between the limiting ring and the driven gear is equal to the axial length of the collar; the housing is divided into two parts, and a first gap is formed between the two parts of the housing, and the two parts of the housing are fixedly connected by a connecting shell, and the driven gear and the second connecting rod can slide within the first gap; a spacer ring is provided between the first magnetic ring and the second magnetic ring, and the spacer ring is made of non-magnetic material.

2. The anchor box with non-destructive testing function according to claim 1, characterized in that: It also includes a fixing seat, which is fixedly connected to the anchor box support seat on the drill frame, and one end of the housing is threadedly connected to the fixing seat.

3. The anchor box with non-destructive testing function according to claim 1, characterized in that: A sensor mounting base is provided inside the blind hole corresponding to the acceleration sensor, and the acceleration sensor is fixed on the sensor mounting base.

4. The anchor box with non-destructive testing function according to claim 1, characterized in that: The accelerometer and its signal transmission line are sealed with sealant.

5. The anchor box with non-destructive testing function according to claim 1, characterized in that: The drive device is a hydraulic motor.

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