A measuring device for grouting holes in coal mine goaf

Abstract

A measuring device for grouting holes in coal mine goaf areas, the invention relates to the field of grouting hole measurement technology, including an adaptive support mechanism, an instrument linkage protection mechanism, and an adjustable visiting mechanism; the adaptive support mechanism includes: a support frame, a support arm, a roller, a balance bar, a short slide rail, a tension spring, and a connecting frame; the inner ends of the upper and lower support arms are rotatably mounted on the shafts at the upper and lower ends of the support frame, and the outer ends of the support arms are rotatably mounted with rollers; both ends of the balance bar are provided with slide grooves, which are slidably connected to the short shafts on the sides of the upper and lower support arms, and at the same time, a short slide rail is fixedly welded to the side of the support frame, and the short slide rail is slidably connected to the circular hole on the balance bar; when the invention is in use, it can automatically adapt to the diameter of the grouting hole, so that the equipment can be stably stuck on the inner wall of the grouting hole, and the support mechanism of the device can ensure that the expansion angle is the same, so that the equipment and the direction of the hole are always kept parallel, thereby greatly enhancing the accuracy of the measurement data.

Description

Technical Field

[0001] The invention relates to the technical field of grouting hole measurement, in particular to a measuring device for grouting holes in a coal mine goaf. Background Art

[0002] With the deepening of coal mining, the formation and expansion of goafs have had a serious impact on the safety and stability of surface and underground projects; the surrounding rock of the goaf is unstable, displaced, cracked, or even collapsed, causing the overlying rock layer to sink and bend, which in turn causes surface subsidence; this deformation continues to develop over a long period of time, posing a potential threat to buildings, water conservancy facilities, and transportation projects, so it is necessary to deal with the goafs in a timely and effective manner to ensure effective control of surface subsidence; among the many methods to solve the goaf problem, grouting technology has been widely used due to its high efficiency and economy; grouting technology fills the goafs by injecting specific slurries, such as cement fly ash slurry, into the goafs to enhance the stability and bearing capacity of the rock mass; and before grouting, a series of measurements need to be made on the grouting holes to collect information such as the slope, azimuth, and single-point or multi-point GPS of the grouting holes;

[0003] A Chinese patent with publication number CN114645706A discloses an inclinometer system and method for geological drilling; an inclinometer system for geological drilling, used to measure the value of a geological borehole at a depth to be measured, the inclinometer system comprising a first device statically placed in the borehole, the first device comprising a first control unit, and an acoustic wave transmitting unit electrically connected to the first control unit, which utilizes the acoustic wave time difference to measure the borehole depth; an electronic gyroscope unit electrically connected to the first control unit, which comprises a three-axis attitude measurement unit, used to measure the borehole inclination.

[0004] The above-mentioned measuring device has simple functions, little measuring data, and is not stable enough in the grouting hole. There is no protection mechanism for the instrument, which is easy to damage the instrument. The present invention is designed to address the shortcomings of the above-mentioned invention. When in use, the present invention can automatically adapt to the diameter of the grouting hole, so that the device can be stably stuck on the inner wall of the grouting hole, and the support mechanism of the device can ensure the same unfolding angle, so that the device and the direction of the hole are always kept parallel, which greatly enhances the accuracy of the measured data; the present invention is equipped with a variety of data measuring instruments such as an inclinometer, an RTK measuring instrument and a peep meter, so that the measured data is more comprehensive, and the peep meter can adjust the angle, and can observe the bottom and side hole walls of the hole from multiple angles in detail to further understand the situation in the hole; when the present device is transported in the hole, the protective tube can protect the instrument to prevent stones or soil blocks falling from the empty inner wall from damaging the instrument. When the measurement starts, the supporting mechanism can be unfolded and the protective tube can be retracted in a linked manner to expose the internal instrument for measurement. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a measuring device for grouting holes in coal mine goaf areas, which can effectively solve the problems in the background technology.

[0006] The technical solution used in the present invention is: a measuring device for grouting holes in coal mine goaf areas, including an adaptive support mechanism, an instrument linkage protection mechanism, and an adjustable exploration mechanism; the adaptive support mechanism includes: a support frame, a support arm, a roller, a balance bar, a short slide rail, a tension spring, and a connecting frame; the inner ends of the upper and lower support arms are rotatably mounted on the shafts at the upper and lower ends of the support frame, and the outer ends of the support arms are rotatably mounted with rollers; slide grooves are provided at both ends of the balance bar, and the slide grooves are slidably connected to the short shafts on the sides of the upper and lower support arms, and at the same time, short slide rails are fixedly welded to the sides of the support frame, and the short slide rails are slidably connected to the round holes on the balance bar; the two ends of the tension spring are respectively connected to the hinge seats on the upper and lower support arms; the connecting frame is welded to the three support frames.

[0007] Preferably, the adaptive support mechanism also includes: a circular ring frame, a limit slider, a convex shaft I, a central upper bracket, a rope, a stepper motor I, and a rotating drum; the circular ring frame is fastened to the connecting frame by bolts, the rotating drum is rotatably installed in the circular ring frame, a convex shaft I slides in the threaded groove of the outer wall of the rotating drum, the convex shaft I is fixedly welded to the limit slider, and the limit slider is slidably installed on the support frame; the central upper bracket is fastened between the three support frames by bolts, the rope is fixedly installed in the middle of the central upper bracket, the stepper motor I is fastened to the central upper bracket by bolts, and the motor shaft of the stepper motor I is meshed with the spur teeth on the inner ring of the circular ring frame.

[0008] Preferably, the instrument linkage protection mechanism includes: a long slide rail, a protective cylinder, and a convex shaft II; the upper end of the long slide rail is fixedly welded to the bottom of the central upper bracket, a protective cylinder is slidably installed on the long slide rail, a convex shaft II is welded on the outer wall of the protective cylinder, and the convex shaft II is slidably connected to the threaded groove of the inner ring of the rotating cylinder.

[0009] Preferably, the adjustable visiting mechanism includes: a central lower bracket, a gear ring, a stepper motor II, and an arc-shaped slider; the top of the central lower bracket is fixedly welded to the lower end of the long slide rail, the gear ring is rotatably mounted on the hollow shaft on the central lower bracket, the gear ring is meshed with the motor gear of the stepper motor II, the stepper motor II is fixedly mounted on the support plate on the long slide rail, the arc-shaped slider is fixedly connected to the gear ring, and the arc-shaped slider is slidably mounted in the incomplete arc-shaped groove on the central lower bracket.

[0010] Preferably, the adjustable visiting mechanism also includes: a right-angle bracket, an electric cylinder, a rack rack, a peephole, a driven gear and an instrument mounting assembly; the right-angle bracket is fixedly welded to the central lower bracket, the cylinder body of the electric cylinder is fixedly mounted on the right-angle bracket, the piston rod of the electric cylinder is fixedly connected to the rack rack, the rack rack is slidably mounted in a square through groove on the arc-shaped slider, the rack rack is meshed with the driven gear, the driven gear is fixedly mounted on the rotating shaft at the end of the peephole, and the rotating shaft at the end of the peephole is rotatably mounted on the hinge seat below the arc-shaped slider.

[0011] Preferably, the instrument installation assembly includes: an inclinometer, an extension bracket, and an RTK measuring instrument; the inclinometer is fixedly installed in the middle of the central lower bracket, the extension bracket is installed at the end of the inclinometer, and the RTK measuring instrument is fixedly installed on the extension bracket.

[0012] Preferably, the thread pitches of the inner ring and outer ring of the drum are different, and the threads of the outer ring are symmetrically distributed.

[0013] Preferably, the protective tube is made of nickel alloy.

[0014] The beneficial effects of the present invention compared with the prior art are:

[0015] (1) When in use, the present invention can automatically adapt to the diameter of the grouting hole, so that the device can be stably stuck on the inner wall of the grouting hole, and the support mechanism of the device can ensure that the deployment angle is the same, so that the device and the direction of the hole are always kept parallel, which greatly enhances the accuracy of the measurement data;

[0016] (2) The present invention is equipped with a variety of data measuring instruments such as an inclinometer, an RTK measuring instrument and a peep instrument, so that the measured data is more comprehensive, and the peep instrument can be adjusted at an angle, and the bottom and side walls of the hole can be observed in detail from multiple angles to further understand the situation in the hole;

[0017] (3) When the equipment is transported in the hole, the protective tube can protect the instrument to prevent stones or soil falling from the inner wall from damaging the instrument. When the measurement starts, the support mechanism can be unfolded and the protective tube can be retracted to further expose the instrument inside for measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention in an unfolded state.

[0019] Figure 2 It is a top view of the overall structure of the present invention in an unfolded state.

[0020] Figure 3 It is a body diagram of the overall structure of the present invention in a closed state.

[0021] Figure 4 This is a first viewing angle diagram of the adaptive support mechanism of the present invention.

[0022] Figure 5 This is a second viewing angle diagram of the adaptive support mechanism of the present invention.

[0023] Figure 6 It is a side view of the adaptive support mechanism of the present invention.

[0024] Figure 7 This is a third viewing angle diagram of the adaptive support mechanism of the present invention.

[0025] Figure 8 This is a protection status view of the instrument linkage protection mechanism of the present invention.

[0026] Fig. 9 This is a non-protection state view of the instrument linkage protection mechanism of the present invention.

[0027] Fig.10 It is a cross-sectional view of the parts drum of the present invention.

[0028] Fig.11 It is a structural view of the adjustable viewing mechanism of the present invention.

[0029] Fig.12 This is a first viewing angle diagram of the internal structure of the adjustable viewing mechanism of the present invention.

[0030] Fig.13 This is a second viewing angle diagram of the internal structure of the adjustable viewing mechanism of the present invention.

[0031] Figure numbers: 1. Support frame; 2. Support arm; 3. Roller; 4. Balance bar; 5. Short slide rail; 6. Tension spring; 7. Connecting frame; 8. Ring frame; 9. Limit slider; 10. Protruding shaft I; 11. Center upper bracket; 12. Rope; 13. Stepping motor I; 14. Rotating drum; 15. Long slide rail; 16. Protective cylinder; 17. Protruding shaft II; 18. Center lower bracket; 19. Inclinometer; 20. Extension bracket; 21. RTK measuring instrument; 22. Gear ring; 23. Stepping motor II; 24. Right-angle bracket; 25. Electric cylinder; 26. Arc slider; 27. Rack frame; 28. Peeping instrument; 29. ​​Driven gear. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use. They are only for the convenience of describing the simplified description of the present invention patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention patent. In addition, spatially relative terms, such as "below", "below", "below", "above", "above", etc., may be used in the text for the convenience of description to describe the relationship of an element or feature relative to other elements or features as shown in the figure. Spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptors used in the text may also be interpreted accordingly.

[0034] Implementation example Figure 1-Figure 13 As shown, a measuring device for grouting holes in coal mine goaf includes an adaptive support mechanism, an instrument linkage protection mechanism, and an adjustable viewing mechanism;

[0035] In an optional implementation manner of the embodiment of the present invention, as Figure 4 As shown, the adaptive support mechanism includes: a support frame 1, a support arm 2, a roller 3, a balance bar 4, a short slide rail 5, a tension spring 6, and a connecting frame 7; the inner ends of the upper and lower support arms 2 are rotatably mounted on the shafts at the upper and lower ends of the support frame 1, and the outer ends of the support arms 2 are rotatably mounted with rollers 3; both ends of the balance bar 4 are provided with slide grooves, which are slidably connected to the short shafts on the sides of the upper and lower support arms 2. At the same time, short slide rails 5 are fixedly welded on the sides of the support frame 1, and the short slide rails 5 are slidably connected to the circular holes on the balance bar 4. The function of the balance bar 4 is to make the support arms 2 at the upper and lower ends rotate at the same angle, so that the head and tail ends of the equipment remain parallel to the grouting hole, making the measurement more accurate; the two ends of the tension spring 6 are respectively connected to the hinge seats on the upper and lower support arms 2, thereby generating tension on the two support arms 2; the connecting frame 7 is welded to the three support frames 1, so that the three support frames 1 remain fixed.

[0036] In an optional implementation manner of the embodiment of the present invention, as Figure 5 , Figure 6 , Figure 7As shown, the adaptive support mechanism also includes: a circular ring frame 8, a limit slider 9, a convex shaft Ⅰ10, a central upper bracket 11, a rope 12, a stepper motor Ⅰ13, and a rotating drum 14; the circular ring frame 8 is fastened to the connecting frame 7 by bolts, and the rotating drum 14 is rotatably installed in the circular ring frame 8. A convex shaft Ⅰ10 slides in the threaded groove of the outer wall of the rotating drum 14, and the convex shaft Ⅰ10 is fixedly welded to the limit slider 9, and the limit slider 9 is slidably installed on the support frame 1; the central upper bracket 11 is fastened between the three support frames 1 by bolts, and the rope 12 is fixedly installed in the middle of the central upper bracket 11. The rope 12 is used to lift and lower the equipment outside the grouting hole, and the stepper motor Ⅰ13 is fastened to the central upper bracket 11 by bolts, and the motor shaft of the stepper motor Ⅰ13 is meshed with the spur teeth on the inner ring of the circular ring frame 8.

[0037] In an optional implementation manner of the embodiment of the present invention, as Figure 8 , Fig. 9 , Fig.10 As shown, the instrument linkage protection mechanism includes: a long slide rail 15, a protection cylinder 16, and a convex shaft II 17; the upper end of the long slide rail 15 is fixedly welded to the bottom of the central upper bracket 11, and the protection cylinder 16 is slidably installed on the long slide rail 15. The convex shaft II 17 is welded on the outer wall of the protection cylinder 16, and the convex shaft II 17 is slidably connected to the threaded groove of the inner ring of the rotating cylinder 14.

[0038] In an optional implementation manner of the embodiment of the present invention, as Fig.11 , Fig.12 , Fig.13 As shown, the adjustable visiting mechanism includes: a central lower bracket 18, a ring gear 22, a stepper motor II 23, and an arc-shaped slider 26; the upper side of the central lower bracket 18 is fixedly welded to the lower end of the long slide rail 15, the ring gear 22 is rotatably mounted on the hollow shaft on the central lower bracket 18, the ring gear 22 is meshed with the motor gear of the stepper motor II 23, the stepper motor II 23 is fixedly mounted on the support plate on the long slide rail 15, the arc-shaped slider 26 is fixedly connected to the ring gear 22, and the arc-shaped slider 26 is slidably mounted in the incomplete arc-shaped groove on the central lower bracket 18.

[0039] In an optional implementation manner of the embodiment of the present invention, as Fig.11 , Fig.12 , Fig.13 As shown, the adjustable visiting mechanism also includes: a right-angle bracket 24, an electric cylinder 25, a rack rack 27, a peephole 28, a driven gear 29 and an instrument mounting assembly; the right-angle bracket 24 is fixedly welded to the central lower bracket 18, the cylinder body of the electric cylinder 25 is fixedly mounted on the right-angle bracket 24, the piston rod of the electric cylinder 25 is fixedly connected to the rack rack 27, the rack rack 27 is slidably mounted in a square through groove on the arc-shaped slider 26, the rack rack 27 is meshed with the driven gear 29, and the driven gear 29 is fixedly mounted on the rotating shaft at the end of the peephole 28, and the rotating shaft at the end of the peephole 28 is rotatably mounted on the hinge seat below the arc-shaped slider 26.

[0040] In an optional implementation manner of the embodiment of the present invention, as Fig.11 As shown, the instrument installation assembly includes: an inclinometer 19, an extension bracket 20, and an RTK measuring instrument 21; the inclinometer 19 is fixedly installed in the middle of the central lower bracket 18, and the extension bracket 20 is installed at the end of the inclinometer 19, and the RTK measuring instrument 21 is fixedly installed on the extension bracket 20.

[0041] In an optional implementation manner of the embodiment of the present invention, as Fig.10 As shown, the pitches of the threads of the inner and outer rings of the drum 14 are different, and the threads of the outer ring are symmetrically distributed.

[0042] In an optional implementation manner of the embodiment of the present invention, as Figure 8 As shown, the protective tube 16 is made of nickel alloy, which has corrosion resistance, high strength and oxidation resistance, and can better protect the precision instruments inside.

[0043] Working principle: When the present invention is in use, the device is manually pulled by the rope 12 to send the device into the grouting hole. After it is sent to the designated position, the support mechanism is unfolded to keep the device stable. Specifically, the stepping motor Ⅰ13 is started to drive the circular ring frame 8 to rotate. The threaded groove on the outer wall of the circular ring frame 8 drives the convex shaft Ⅰ10 at the upper and lower ends to move toward the middle, that is, drives the limit slider 9 to slide toward the middle, so that the limit slider 9 is separated from the limit of the support arm 2. The support arm 2 is unfolded under the action of the tension spring 6, and the roller 3 on the support arm 2 clamps the inner wall of the grouting hole, so that the device is stable and always parallel to the grouting hole. While the circular ring frame 8 rotates, the threaded groove on the inner wall of the circular ring frame 8 drives the protective tube 16 to move upward, so that the inclinometer 19 and the RTK measuring instrument 21 are exposed, and the rope 12 is pulled to adjust the position of the device, so that the internal inclinometer 19 and the RTK measuring instrument 21 can measure and collect data, and multi-point measurement can be performed at different positions;

[0044] While collecting data, the peephole 28 can be controlled to move so as to observe the conditions at different positions in the hole. Specifically, the electric cylinder 25 is started to drive the rack 27 to slide up and down, thereby driving the driven gear 29 to rotate, thereby driving the peephole 28 to rotate. The peephole 28 can be rotated outward up to a maximum of ninety degrees to observe the conditions of the inner wall around the grouting hole, and the stepper motor II 23 is started to drive the ring gear 22 to rotate, thereby also driving the peephole 28 to rotate horizontally to increase the viewing angle.

Claims

1. A measuring device for grouting holes in coal mine goaf, characterized in that: It comprises an adaptive support mechanism, an instrument linkage protection mechanism, and an adjustable visiting mechanism; the adaptive support mechanism comprises: a support frame (1), a support arm (2), a roller (3), a balance bar (4), a short slide rail (5), a tension spring (6), and a connecting frame (7); the inner ends of the upper and lower support arms (2) are rotatably mounted on the shafts at the upper and lower ends of the support frame (1), and the outer ends of the support arms (2) are rotatably mounted with rollers (3); both ends of the balance bar (4) are provided with slide grooves, which are slidably connected to the short shafts on the sides of the upper and lower support arms (2); at the same time, a short slide rail (5) is fixedly welded to the side of the support frame (1), and the short slide rail (5) is slidably connected to the round hole on the balance bar (4); the two ends of the tension spring (6) are respectively connected to the hinge seats on the upper and lower support arms (2); the connecting frame (7) is welded to the three support frames (1); The adaptive support mechanism further comprises: a circular ring frame (8), a limit slider (9), a convex shaft I (10), a central upper bracket (11), a rope (12), a stepping motor I (13), and a rotating drum (14); the circular ring frame (8) is fastened to the connecting frame (7) by bolts, the rotating drum (14) is rotatably mounted in the circular ring frame (8), a convex shaft I (10) is slidably arranged in a threaded groove on the outer wall of the rotating drum (14), the convex shaft I (10) is fixedly welded to the limit slider (9), and the limit slider (9) is slidably mounted on the support frame (1); the central upper bracket (11) is fastened between the three support frames (1) by bolts, the rope (12) is fixedly mounted in the middle of the central upper bracket (11), the stepping motor I (13) is fastened to the central upper bracket (11) by bolts, and the motor shaft of the stepping motor I (13) is meshed with the spur teeth on the inner ring of the circular ring frame (8).

2. The measuring device for grouting holes in coal mine goaf according to claim 1 is characterized in that: The instrument linkage protection mechanism comprises: a long slide rail (15), a protection tube (16), and a convex shaft II (17); the upper end of the long slide rail (15) is fixedly welded to the bottom of the central upper bracket (11), the protection tube (16) is slidably mounted on the long slide rail (15), the convex shaft II (17) is welded on the outer wall of the protection tube (16), and the convex shaft II (17) is slidably connected to the threaded groove of the inner ring of the rotating cylinder (14).

3. The measuring device for grouting holes in coal mine goaf according to claim 2 is characterized in that: The adjustable visiting mechanism comprises: a central lower bracket (18), a gear ring (22), a stepper motor II (23), and an arc-shaped slider (26); the upper surface of the central lower bracket (18) is fixedly welded to the lower end of the long slide rail (15); the gear ring (22) is rotatably mounted on a hollow shaft on the central lower bracket (18); the gear ring (22) is meshed with a motor gear of the stepper motor II (23); the stepper motor II (23) is fixedly mounted on a support plate on the long slide rail (15); the arc-shaped slider (26) is fixedly connected to the gear ring (22); and the arc-shaped slider (26) is slidably mounted in an incomplete arc-shaped groove on the central lower bracket (18); The adjustable viewing mechanism further comprises: a right-angle bracket (24), an electric cylinder (25), a rack rack (27), a peep instrument (28), a driven gear (29) and an instrument mounting assembly; the right-angle bracket (24) is fixedly welded to the central lower bracket (18), the cylinder body of the electric cylinder (25) is fixedly mounted on the right-angle bracket (24), the piston rod of the electric cylinder (25) is fixedly connected to the rack rack (27), the rack rack (27) is slidably mounted in a square through groove on the arc-shaped slider (26), the rack rack (27) is meshed with the driven gear (29), the driven gear (29) is fixedly mounted on the rotating shaft at the end of the peep instrument (28), and the rotating shaft at the end of the peep instrument (28) is rotatably mounted on a hinge seat below the arc-shaped slider (26).

4. The measuring device for grouting holes in coal mine goaf according to claim 3 is characterized in that: The instrument installation assembly comprises: an inclinometer (19), an extension bracket (20), and an RTK measuring instrument (21); the inclinometer (19) is fixedly installed in the middle of the central lower bracket (18), the extension bracket (20) is installed at the end of the inclinometer (19), and the RTK measuring instrument (21) is fixedly installed on the extension bracket (20).

5. The measuring device for grouting holes in coal mine goaf according to claim 1, characterized in that: The pitches of the threads of the inner and outer rings of the rotating drum (14) are different, and the threads of the outer ring are symmetrically distributed.

6. The measuring device for grouting holes in coal mine goaf according to claim 2, characterized in that: The protective tube (16) is made of nickel alloy.

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