Small coal mine underground drill rod flaw detection device

Abstract

The invention belongs to the technical field of drill rod flaw detection, and discloses a small coal mine underground drill rod flaw detection device which comprises a sleeve, the sleeve is arranged outside a drill rod in a sleeving mode and makes rolling contact with the outer wall of the drill rod, a flaw detection assembly used for conducting flaw detection on the drill rod is arranged in the sleeve, and when the drill rod passes through the sleeve, flaw detection is conducted on the drill rod through the flaw detection assembly; the flaw detection assembly comprises an ultrasonic detector arranged on the sleeve, when the drill rod penetrates through the sleeve, the ultrasonic detector transmits ultrasonic waves to the drill rod to detect the drill rod, and the ultrasonic detector is electrically connected with the flaw detection host and used for controlling the ultrasonic detector to operate and receiving a detection result; a plurality of rollers are arranged on the inner wall of the sleeve at equal intervals and are in rolling contact with the outer wall of the drill rod. The device is simple in structure, convenient to maintain and high in reliability, regular flaw detection can be conveniently carried out on the drill rod on a coal mine underground construction site, the drill rod does not need to be lifted to be transported, flaw detection time is saved, cost is reduced, the fault occurrence probability of the drill rod is reduced, and construction safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of drill rod flaw detection, and in particular relates to a small drill rod flaw detection device in a coal mine. Background Art

[0002] In the process of coal mining, the drill rod is a key drilling tool, and its quality directly affects the drilling efficiency and safety. However, during the drilling process, the drill rod breaks through the stratum structure, and the resistance of the stratum will produce a mutual torsional force with the rotating drill rod. After long-term use, this torsional force and the pressure of the stratum and the complex underground environment will cause the drill rod to wear or produce defects such as cracks, or even break, affecting normal drilling work. Therefore, it is very important to perform flaw detection on the drill rod to detect drill rod failures in a timely manner.

[0003] The existing flaw detection scheme for drill rods in coal mines is to lift the drill rods from underground to the wellhead, and then transport them to a designated location for flaw detection by large equipment. If there is no problem after the flaw detection, the drill rod needs to be transported underground again to continue to be used. The flaw detection is inconvenient and the whole cycle takes a long time. In addition, a portable ultrasonic flaw detector can be used for flaw detection, but its detection efficiency and accuracy are limited by the skill level of the operator and the on-site environment, and it is difficult to fully detect long-distance drill rods, which is prone to missed detection or misjudgment.

[0004] Therefore, the present application designs a small device for detecting flaws in drill rods in coal mines to solve the above-mentioned technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a small device for detecting flaws in drill rods in coal mines.

[0006] To achieve the above-mentioned object, the present invention provides a small device for detecting flaws in drill rods in coal mines, comprising a sleeve, the sleeve being sleeved outside the drill rod, the sleeve being in rolling contact with the outer wall of the drill rod, a flaw detection component for detecting flaws in the drill rod being arranged in the sleeve, and the drill rod being detected flaws by the flaw detection component when the drill rod passes through the sleeve;

[0007] The flaw detection assembly includes an ultrasonic detector arranged on the sleeve. When the drill rod passes through the sleeve, the ultrasonic detector emits ultrasonic waves to the drill rod to detect the drill rod. The ultrasonic detector is electrically connected to the flaw detection host to control the operation of the ultrasonic detector and receive the detection results.

[0008] The inner wall of the sleeve is provided with a plurality of rollers at equal intervals, and the rollers are in rolling contact with the outer wall of the drill rod.

[0009] Preferably, the ultrasonic detector is electrically connected to the flaw detection host via a connecting line.

[0010] Preferably, the sleeve comprises two symmetrically arranged half-cylinders, two side edges of the half-cylinders are respectively fixed with connecting blocks, the two half-cylinders are detachably connected via the correspondingly arranged connecting blocks, and the roller is arranged on the inner wall of the half-cylinder.

[0011] Preferably, the roller includes a mounting groove opened on the inner wall of the semi-cylinder, a support rod is arranged in the mounting groove, the free end of the support rod faces the drill rod and is provided with a support wheel, and the support wheel is in rolling contact with the outer wall of the drill rod.

[0012] Preferably, a support frame corresponding to the mounting groove is fixedly connected to the inner wall of the semi-cylinder, the support rod is covered in the support frame, and the free end of the support rod passes through and extends out of the support frame.

[0013] Preferably, the support rod includes a fixed cylinder fixed in the mounting groove, a movable rod is slidably connected in the fixed cylinder, the movable rod extends out of the support frame and is installed with the support wheel; a pressure sensor is arranged at the bottom end of the inner cavity of the fixed cylinder, and a force transmission spring is arranged between the movable rod and the pressure sensor.

[0014] Preferably, a movable plate is slidably connected in the fixed cylinder, the pressure sensor is installed on one end of the movable plate facing the movable rod, and the end of the movable plate away from the movable rod is rotatably connected to an adjusting rod, and the adjusting rod extends out of the half cylinder and is threadedly connected to the fixed cylinder.

[0015] Preferably, the inner wall of the fixed cylinder is provided with a plurality of longitudinally arranged guide grooves, the outer wall of the movable plate is fixedly connected with a plurality of guide blocks adapted to the guide grooves, and the guide blocks are slidably connected in the guide grooves.

[0016] Preferably, the ultrasonic detector includes a plurality of detection grooves equidistantly arranged on the inner wall of the semi-cylinder, ultrasonic sensors are arranged in the detection grooves, the plurality of ultrasonic sensors are arranged in parallel and electrically connected to a switching assembly arranged on the outer wall of the semi-cylinder, and the switching assembly is electrically connected to the flaw detection host.

[0017] Preferably, the adapter assembly includes an adapter groove arranged on the outer wall of the semi-cylinder, the adapter groove is detachably connected with an adapter, the adapter is electrically connected to the adapter groove, and the flaw detection host is electrically connected to the adapter.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses a small device for flaw detection of drill rods in coal mines. When in use, the drill rod is passed through a sleeve, and after being kept in a stable state, the flaw detection component is started to perform flaw detection on the part of the drill rod that needs flaw detection. The device has a compact design and is easy to operate. The drill rod only needs to be passed through the sleeve to be flaw detected by the flaw detection component, and the flaw detection part can be freely selected. High-frequency local flaw detection can be flexibly performed on the vulnerable connection parts of the drill rod, and regular and comprehensive flaw detection can also be performed on the entire drill rod, saving flaw detection time and reducing costs. The flaw detection component performs flaw detection on the drill rod through an ultrasonic detector, and the operation of the ultrasonic detector is controlled by the flaw detection host. At the same time, the detection results are received and processed to form an image, which intuitively displays the status of the drill rod.

[0019] The present invention has a simple structure, is easy to maintain, and has high reliability. It is convenient to perform regular flaw detection on drill rods at underground coal mine construction sites, and there is no need to transport the drill rods up to the well, thus saving flaw detection time and reducing costs, reducing the probability of drill rod failure, and improving construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 This is a schematic diagram of a small device for detecting flaws in drill rods in underground coal mines according to the present invention;

[0022] Figure 2 A top view of the sleeve of the present invention;

[0023] Figure 3 For the present invention Figure 2 A partial enlarged view of middle A;

[0024] Figure 4 For the present invention Figure 2 A partial enlarged view of B in the middle;

[0025] Figure 5 It is a schematic diagram of the top view of the fixed cylinder of the present invention;

[0026] In the figure: 1. sleeve; 2. roller; 3. ultrasonic detector; 4. connecting line; 5. flaw detection host; 6. drill rod; 11. half cylinder; 12. connecting block; 13. connecting bolt; 14. mounting slot; 15. detection slot; 21. support rod; 22. support wheel; 23. support frame; 24. fixed cylinder; 25. movable rod; 26. pressure sensor; 27. force transmission spring; 28. movable plate; 29. ​​adjusting rod; 210. guide slot; 211. guide block; 31. ultrasonic sensor; 32. wire; 33. adapter slot; 34. adapter; 35. connecting slot; 36. connecting cylinder; 37. conductive block; 38. conductive slot. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1-Figure 5 As shown, this embodiment provides a small device for detecting flaws in drill rods in coal mines, including a sleeve 1, which is sleeved outside a drill rod 6, and the sleeve 1 is in rolling contact with the outer wall of the drill rod 6. A flaw detection component for detecting flaws in the drill rod 6 is arranged in the sleeve 1. When the drill rod 6 passes through the sleeve 1, the flaw detection component is used to detect flaws in the drill rod 6.

[0030] The flaw detection assembly includes an ultrasonic detector 3 arranged on the sleeve 1. When the drill rod 6 passes through the sleeve 1, the ultrasonic detector 3 transmits ultrasonic waves to the drill rod 6 to detect the drill rod 6. The ultrasonic detector 3 is electrically connected to the flaw detection host 5 to control the operation of the ultrasonic detector 3 and receive the detection results.

[0031] The inner wall of the sleeve 1 is provided with a plurality of rollers 2 at equal intervals, and the rollers 2 are in rolling contact with the outer wall of the drill rod 6 .

[0032] The invention discloses a small device for detecting flaws of drill rods in underground coal mines. When in use, the drill rod 6 is passed through a sleeve 1, and after being kept in a stable state, the flaw detection component is started to detect the parts of the drill rod 6 that need to be detected. The device is compact in design and easy to operate. The drill rod 6 can be detected by the flaw detection component only by passing it through the sleeve 1, and the detection part can be freely selected. The high-frequency local flaw detection can be flexibly performed on the vulnerable connection parts of the drill rod 6, and the drill rod 6 can also be regularly and comprehensively detected as a whole, saving the flaw detection time and reducing the cost. The flaw detection component detects the flaws of the drill rod 6 through an ultrasonic detector 3, and the operation of the ultrasonic detector 3 is controlled by a flaw detection host 5, and the detection results are received and processed at the same time to form an image, and the state of the drill rod 6 is intuitively displayed. The device has a simple structure, is easy to maintain, and has high reliability. It is convenient to perform regular flaw detection on the drill rod 6 at the construction site underground in the coal mine, and there is no need to transport the drill rod 6 to the well, saving the flaw detection time and reducing the cost, reducing the probability of failure of the drill rod 6, and improving the safety of construction.

[0033] Furthermore, the flaw detection body of this embodiment can control the operation of the ultrasonic detector 3, and at the same time can receive the detection results of the ultrasonic detector 3, and process the results, and then form an image of the detection area of ​​the drill rod 6, and display it on the display screen of the flaw detection host 5, so as to intuitively and conveniently display the status of the drill rod 6 and detect the damage of the drill rod 6.

[0034] In a further optimized solution, the ultrasonic detector 3 is electrically connected to the flaw detection host 5 through a connecting line 4. Quick-release connectors are provided at both ends of the connecting line 4, which can conveniently connect the ultrasonic detector and the flaw detection host 5, thereby transmitting the control signal of the flaw detection host 5 to the ultrasonic detector, and transmitting the detection result of the ultrasonic detector to the flaw detection host 5.

[0035] According to a further optimized solution, the sleeve 1 includes two symmetrically arranged half-cylinders 11, and the two sides of the half-cylinders 11 are respectively fixed with connecting blocks 12, and the two half-cylinders 11 are detachably connected through the correspondingly arranged connecting blocks 12, and the roller 2 is arranged on the inner wall of the half-cylinder 11. The sleeve 1 is divided into two semicircular half-cylinders 11. When in use, the two half-cylinders 11 are combined to surround the outer wall of the drill rod 6, and the two opposite connecting blocks 12 are fitted together. The two half-cylinders 11 are locked by a plurality of connecting bolts 13 locking bolts, which facilitates assembly and disassembly and is more convenient to use.

[0036] In a further optimized solution, the roller 2 includes a mounting groove 14 provided on the inner wall of the semi-tube 11, a support rod 21 is provided in the mounting groove 14, the free end of the support rod 21 faces the drill rod 6 and is provided with a support wheel 22, and the support wheel 22 is in rolling contact with the outer wall of the drill rod 6. The retractable support rod 21 supports the support wheel 22 on the support wheel 22, so that the sleeve 1 can be stably against the drill rod 6, and is suitable for drill rods 6 of different models, and has stronger adaptability.

[0037] Furthermore, the support wheel 22 has a locking function, so that it can be locked during detection to prevent shaking from affecting the detection result.

[0038] In a further optimized solution, a support frame 23 corresponding to the mounting groove 14 is fixedly connected to the inner wall of the half cylinder 11, and the support rod 21 is covered in the support frame 23, and the free end of the support rod 21 passes through and extends out of the support frame 23. The support frame 23 covers the support rod 21, which can reduce the dirt and other impurities on the drill rod 6 from falling into the mounting groove 14, thereby improving the protection.

[0039] To further optimize the solution, the support rod 21 includes a fixed cylinder 24 fixed in the mounting groove 14, a movable rod 25 is slidably connected in the fixed cylinder 24, the movable rod 25 extends out of the support frame 23 and is installed with a support wheel 22; a pressure sensor 26 is provided at the bottom end of the inner cavity of the fixed cylinder 24, and a force transmission spring 27 is provided between the movable rod 25 and the pressure sensor 26; a movable plate 28 is slidably connected in the fixed cylinder 24, the pressure sensor 26 is installed on one end of the movable plate 28 facing the movable rod 25, and an adjusting rod 29 is rotatably connected to the end of the movable plate 28 away from the movable rod 25, and the adjusting rod 29 extends out of the half cylinder 11 and is threadedly connected to the fixed cylinder 24. The pressure between the support wheel 22 and the drill rod 6 is transmitted to the pressure sensor 26 through the force transmission spring 27. Multiple pressure sensors 26 are compared with each other, so that the sleeve 1 is coaxial with the drill rod 6, and the error between the detection data of the ultrasonic detection components at different angles is reduced; and by rotating the adjusting rod 29, the length of the rod extending into the fixed tube 24 can be changed, thereby driving the position of the movable plate 28, and then adjusting the extended length of the movable rod 25 through the transmission spring, so that the support wheel 22 can abut against the outer wall of the drill rod 6.

[0040] Furthermore, the adjusting rods 29 of the present embodiment are adjusted synchronously to ensure the positions of the movable plates 28 are synchronized.

[0041] In a further optimized solution, the inner wall of the fixed cylinder 24 is provided with a plurality of longitudinally arranged guide grooves 210, and the outer wall of the movable plate 28 is fixedly connected with a plurality of guide blocks 211 adapted to the guide grooves 210, and the guide blocks 211 are slidably connected in the guide grooves 210. The arrangement of the guide blocks 211 and the guide grooves 210 enables the movable plate 28 to only be lifted and slid on the outer wall of the fixed cylinder 24, and will not rotate with the rotation of the adjustment rod 29, thereby ensuring a stable connection between the pressure sensor 26 and the force transmission spring 27.

[0042] Further optimization scheme, the ultrasonic detector 3 includes a plurality of detection slots 15 arranged at equal intervals on the inner wall of the semi-cylinder 11, and ultrasonic sensors 31 are arranged in the detection slots 15, and the plurality of ultrasonic sensors 31 are arranged in parallel and electrically connected to the adapter assembly arranged on the outer wall of the semi-cylinder 11, and the adapter assembly is electrically connected to the flaw detection host 5. The ultrasonic sensor 31 is arranged in the detection slot 15 to prevent collision caused by its protrusion, thereby improving safety; when in use, the plurality of ultrasonic sensors 31 surround the drill rod 6 to detect the surroundings of the drill rod 6, and at the same time, the information detected by the ultrasonic sensors 31 arranged in parallel is transmitted to the flaw detection host through the adapter assembly, processed by the flaw detection host, and then the information at each angle is combined to form the overall detection result of the drill rod 6, and the damage of the drill rod 6 is found.

[0043] Furthermore, a conducting wire 32 is provided in the half cylinder 11 , and a plurality of ultrasonic sensors 31 are connected in parallel to the conducting wire 32 .

[0044] Further optimization scheme, the adapter assembly includes an adapter slot 33 arranged on the outer wall of the half cylinder 11, and the adapter slot 33 is detachably connected with an adapter 34, the adapter 34 is electrically connected to the adapter slot 33, and the flaw detection host 5 is electrically connected to the adapter 34. A conductive head is arranged in the adapter slot 33, and the conductive head is electrically connected to a plurality of ultrasonic detectors connected in parallel, and one end of the adapter 34 is provided with a conductive slot 38, and the other end is connected to the connecting line 4; when the adapter 34 is inserted into the adapter slot 33, the conductive head is inserted into the conductive slot 38 and connected to transmit signals; after use, it can be easily disassembled, which is convenient for storage and transportation, and can also improve safety.

[0045] Furthermore, a connecting groove 35 is provided at the outer end of the adapter groove 33, and a connecting tube 36 is rotatably connected to the adapter 34. When the adapter 34 needs to be connected to the adapter groove 33, the connecting tube 36 is rotated so that it is threadedly connected in the connecting groove 35, so that the connection between the adapter 34 and the adapter groove 33 is stable, thereby ensuring the stable connection between the conductive groove 38 and the conductive block 37.

[0046] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 should not be understood as a limitation on the present invention.

[0047] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A small device for detecting drill pipe flaws in coal mines, characterized in that: The invention comprises a sleeve (1), wherein the sleeve (1) is sleeved outside a drill rod (6), the sleeve (1) is in rolling contact with the outer wall of the drill rod (6), a flaw detection component for flaw detection on the drill rod (6) is arranged inside the sleeve (1), and when the drill rod (6) passes through the sleeve (1), the flaw detection component is used to detect flaws on the drill rod (6); The flaw detection component comprises an ultrasonic detector (3) arranged on the sleeve (1); when the drill rod (6) passes through the sleeve (1), the ultrasonic detector (3) emits ultrasonic waves to the drill rod (6) to detect the drill rod (6); the ultrasonic detector (3) is electrically connected to a flaw detection host (5) to control the operation of the ultrasonic detector (3) and receive detection results; The inner wall of the sleeve (1) is provided with a plurality of rollers (2) at equal intervals, and the rollers (2) are in rolling contact with the outer wall of the drill rod (6).

2. The small device for detecting flaws in drill rods in underground coal mines according to claim 1 is characterized in that: The ultrasonic detector (3) is electrically connected to the flaw detection host (5) via a connecting line (4).

3. The small device for detecting flaws in drill rods in underground coal mines according to claim 1 is characterized in that: The sleeve (1) comprises two symmetrically arranged half-cylinders (11), two side edges of the half-cylinders (11) are respectively fixed with connecting blocks (12), the two half-cylinders (11) are detachably connected via the correspondingly arranged connecting blocks (12), and the roller (2) is arranged on the inner wall of the half-cylinder (11).

4. The small-sized device for detecting flaws in drill rods in underground coal mines according to claim 3 is characterized in that: The roller (2) comprises a mounting groove (14) provided on the inner wall of the semi-cylinder (11), a support rod (21) being arranged in the mounting groove (14), a free end of the support rod (21) facing the drill rod (6) and being provided with a support wheel (22), and the support wheel (22) being in rolling contact with the outer wall of the drill rod (6).

5. The small device for detecting flaws in drill rods in underground coal mines according to claim 4 is characterized in that: A support frame (23) corresponding to the mounting groove (14) is fixedly connected to the inner wall of the semi-cylinder (11); the support rod (21) is covered in the support frame (23); and the free end of the support rod (21) passes through and extends out of the support frame (23).

6. The small device for detecting flaws in drill rods in underground coal mines according to claim 5 is characterized in that: The support rod (21) comprises a fixed cylinder (24) fixedly connected in the mounting groove (14), a movable rod (25) being slidably connected in the fixed cylinder (24), the movable rod (25) extending out of the support frame (23) and being mounted with the support wheel (22); a pressure sensor (26) is arranged at the bottom end of the inner cavity of the fixed cylinder (24), and a force transmission spring (27) is arranged between the movable rod (25) and the pressure sensor (26).

7. The small-sized device for detecting flaws in drill rods in underground coal mines according to claim 6 is characterized in that: A movable plate (28) is slidably connected inside the fixed cylinder (24), the pressure sensor (26) is mounted on one end of the movable plate (28) facing the movable rod (25), and an adjusting rod (29) is rotatably connected to one end of the movable plate (28) away from the movable rod (25), the adjusting rod (29) extends out of the half cylinder (11) and is threadedly connected to the fixed cylinder (24).

8. The small device for detecting flaws in drill rods in underground coal mines according to claim 7, characterized in that: The inner wall of the fixed cylinder (24) is provided with a plurality of longitudinally arranged guide grooves (210), and the outer wall of the movable plate (28) is fixedly connected with a plurality of guide blocks (211) adapted to the guide grooves (210), and the guide blocks (211) are slidably connected in the guide grooves (210).

9. The small-sized device for detecting flaws in drill rods in underground coal mines according to claim 3 is characterized in that: The ultrasonic detector (3) comprises a plurality of detection grooves (15) arranged at equal intervals on the inner wall of the semi-cylinder (11), wherein ultrasonic sensors (31) are arranged in the detection grooves (15), and the plurality of ultrasonic sensors (31) are arranged in parallel and electrically connected to a switching assembly arranged on the outer wall of the semi-cylinder (11), and the switching assembly is electrically connected to the flaw detection host (5).

10. The small-sized device for detecting flaws in drill rods in underground coal mines according to claim 9, characterized in that: The adapter assembly comprises an adapter groove (33) arranged on the outer wall of the half cylinder (11); the adapter groove (33) is detachably connected to an adapter (34); the adapter (34) is electrically connected to the adapter groove (33); and the flaw detection host (5) is electrically connected to the adapter (34).

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