Device for detecting thread of drill rod

Abstract

The invention relates to a device for detecting threads of a drill rod. The device comprises a frame assembly and an adjusting assembly, wherein the frame assembly is constructed to be capable of containing a male connector of the drill rod in a magnetic field, and the adjusting assembly is installed on a rotary disc of the frame assembly. The adjusting assembly comprises an installation disc installed on the rotary disc in a sliding mode, an air cylinder installed on the rotary disc and used for pushing the installation disc to move and a sliding rail rotationally connected with the installation disc, and an angle adjusting mechanism is further arranged between the sliding rail and the installation disc. The detection assembly is in sliding connection with the sliding rail. The air cylinder can adjust the distance from the mounting disc to the rotating center of the rotating disc. The angle adjusting mechanism is configured to be capable of adjusting the inclination angle of the sliding rail relative to the axis of the male connector, so that the detection assembly can extend into the threaded groove of the male connector. According to the device, the rotation radius of the detection assembly is adjusted through the air cylinder, and the detection angle of the detection assembly is adjusted through the angle adjusting mechanism, so that the device is suitable for male drill bits of drill rods of different specifications and different structural forms, and the adaptability of the device is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drill rod detection, and in particular to a device for detecting threads of a drill rod. Background Art

[0002] In actual working conditions, due to the structural characteristics of the drill pipe connection thread, the second and third threads at the root of the thread are more prone to defects such as cracks and corrosion, which can cause drill pipe failure. To ensure the reliability of drill pipe during use and reduce economic losses, regular non-destructive testing of the drill pipe connection threads is particularly important.

[0003] Drill pipe joints are divided into two types: male and female. The male joint has external threads, while the female joint has internal threads. The male and female joints are welded to the ends of a single drill pipe. Existing detection devices can detect the external threads of male joints. However, due to the wide variety of male joints, these detection devices can only detect the external threads of a single type of male joint. Consequently, these detection devices have poor adaptability and are difficult to detect the external threads of different types of male joints. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the present invention provides a device for detecting the threads of a drill rod, which can be adapted to different types of male connectors so as to detect the external threads of these different types of male connectors.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide a device for detecting the thread of a drill rod, comprising:

[0006] a frame assembly configured to receive the male connector of the drill pipe in the magnetic field;

[0007] an adjustment assembly comprising a mounting plate mounted on the turntable of the frame assembly, and a slide rail rotatably connected to the mounting plate, wherein an angle adjustment mechanism is provided between the slide rail and the mounting plate; and

[0008] A detection component is slidably connected to the slide rail,

[0009] The mounting plate is configured to change the eccentricity between the mounting plate and the rotating plate.

[0010] The angle adjustment mechanism is configured to adjust the angle of the slide rail relative to the axis of the male connector so that the detection assembly can extend into the thread groove of the male connector.

[0011] Furthermore, a limit strip is provided on the surface of the turntable, and a cylinder is arranged along the axial direction of the limit strip.

[0012] The cylinder is configured to push the mounting plate to move relative to the turntable along the axial direction of the limiting bar, so as to change the eccentricity between the mounting plate and the turntable.

[0013] Furthermore, the angle adjustment mechanism includes a sliding block mounted on the slide rail, and a pull rod connected to the mounting plate and the sliding block, wherein a first end of the pull rod is slidably and rotatably connected to the sliding block, and a second end of the pull rod is rotatably connected to the mounting plate.

[0014] When the pull rod rotates around the second end, the limiting block at the first end rolls in the limiting groove of the sliding block, so that the slide rail can rotate around the mounting plate.

[0015] Furthermore, the angle adjustment mechanism further includes a fixing bar fixedly connected to the mounting plate, a second motor mounted on the fixing bar, and a rotating rod coaxially connected to the output shaft of the second motor.

[0016] The rotating rod is rotatably connected to the pull rod, so that the second motor can drive the pull rod to rotate around the second end through the rotating rod.

[0017] Furthermore, the detection assembly includes a slider slidably mounted on the slide rail, and a detection member mounted on the slider, wherein the detection member is configured to extend into the thread groove of the male connector and move axially along the slide rail under the guidance of the thread groove.

[0018] Furthermore, an adjustment plate for mounting the detection member is provided on the slider, and the adjustment plate can enable the detection member to extend into the thread groove of the male connector under the action of elastic force.

[0019] Furthermore, a mounting seat is provided on the slider, and a base frame slidably connected to the adjustment plate is provided on the mounting seat. An elastic member is abutted between the adjustment plate and the mounting seat, so that the adjustment plate can move axially along the base frame.

[0020] Furthermore, the frame assembly includes a first substrate and a second substrate arranged in parallel and spaced apart, and a first magnetic component for generating the magnetic field is installed on the first substrate and / or the second substrate. A plurality of connecting rods are also arranged between the first substrate and the second substrate to form a stable structure for accommodating the male connector in the magnetic field.

[0021] Furthermore, a first motor is mounted on the first substrate, and an output shaft of the first motor passes through the first substrate and is connected to the turntable, so that the adjustment component and the detection component can rotate around the axis of the male connector.

[0022] Furthermore, it also includes a clamping assembly arranged next to the second base plate, including a fixing frame, a third motor mounted on the fixing frame, and a bidirectional screw and a guide rod connected to the fixing frame, wherein the guide rod passes through the movable plate screwed to the bidirectional screw.

[0023] The third motor is configured to drive the bidirectional screw to rotate, so that the movable plates can move away from or closer to each other, so that the movable plates release or clamp the drill rod.

[0024] The beneficial effects of the present invention are as follows: the present invention provides a device for detecting the threads of a drill rod, comprising a frame assembly configured to accommodate the male connector of the drill rod in a magnetic field, and an adjustment assembly mounted on a turntable of the frame assembly. The adjustment assembly comprises a mounting plate slidably mounted on the turntable, a cylinder mounted on the turntable and used to push the mounting plate to move, and a slide rail rotatably connected to the mounting plate, wherein an angle adjustment mechanism is further provided between the slide rail and the mounting plate. The device also comprises a detection assembly slidably connected to the slide rail. The cylinder is configured to adjust the distance from the mounting plate to the center of rotation of the turntable. The angle adjustment mechanism is configured to adjust the inclination angle of the slide rail relative to the axis of the male connector, so that the detection assembly can extend into the thread groove of the male connector.

[0025] The device uses a pneumatic cylinder to adjust the rotation radius of the detection assembly, and an angle adjustment mechanism to adjust the detection angle. This allows it to accommodate male drill bits of different drill rod specifications and structures, effectively improving the device's adaptability. Furthermore, the clamping assembly not only stably holds the drill rod but also adjusts its angle via a correction rod to ensure it remains horizontal. This ensures the device accurately detects the external threads of the drill rod's joints, preventing detection errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Figure 1 Shown is a schematic structural diagram of a device for detecting the threads of a drill rod from one perspective.

[0028] Figure 2 Shown Figure 1 The structure diagram of the device for detecting the thread of the drill rod is shown from another perspective.

[0029] Figure 3 Shown Figure 2 A partial enlarged view of a device for detecting threads of a drill rod is shown.

[0030] Figure 4Shown is a structural schematic diagram of the adjustment component and the detection component from one perspective.

[0031] Figure 5 Shown Figure 4 A partial enlarged view of the adjustment component and the detection component is shown.

[0032] Figure 6 Shown is a schematic structural diagram of the detection component.

[0033] Figure 7 Shown is a schematic structural diagram of the clamping assembly.

[0034] In the figures, reference numerals are as follows: 10, frame assembly; 11, first substrate; 12, second substrate; 13, connecting rod; 14, first magnetic member; 15, first motor; 16, turntable;

[0035] 20. Adjustment assembly; 21. Limiting bar; 22. Mounting plate; 221. First fixing block; 222. Second fixing block; 23. Cylinder; 231. Push plate; 24. Slide rail; 25. Angle adjustment mechanism; 251. Fixing bar; 252. Sliding block; 2521. Sliding slot; 2522. Limiting slot; 253. Pull rod; 2531. Limiting block; 254. Second motor; 255. Rotating rod;

[0036] 30. Detection assembly; 31. Slider; 32. Mounting seat; 33. Base frame; 34. Second magnetic member; 35. Adjustment plate; 351. Elastic member; 352. Pin; 36. Detection member;

[0037] 40. Clamping assembly; 41. Fixing frame; 411. Guide rod; 42. Third motor; 421. Bidirectional screw; 422. Moving plate; 423. Clamping plate; 43. Lifting frame; 431. Correction rod; 432. Telescopic member; 4321. Compression rod; 4322. Spring; 4323. Sleeve; 433. Reinforcement rod;

[0038] 50. Power supply; 51. Motor control module; 52. Signal transmission module. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is now described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention. Obviously, the described embodiments are 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 making creative work are within the scope of protection of the present invention.

[0040] refer to Figure 1and Figure 2 As shown, the present invention provides a device for detecting the threads of a drill rod, comprising a frame assembly 10, an adjusting assembly 20 mounted on the frame assembly 10, and a detecting assembly 30 mounted on the adjusting assembly 20. A clamping assembly 40 is provided at one end of the frame assembly 10 for temporarily fixing the drill rod so as to facilitate the installation of the male joint of the drill rod in the frame assembly 10. Since the male joint of the drill rod may be roughly cylindrical, truncated cone or some other structural types. The existing detecting device can only detect male joints of a single structural type. Even male joints of the same structural type may have different sizes. The adjusting assembly 20 of the device in the present application can adjust the moving direction of the detecting assembly 30 according to the shape structure of the male joint being detected, so as to detect male joints of different shapes, structures and sizes.

[0041] In some embodiments, the frame assembly 10 includes a vertically arranged first base plate 11, a second base plate 12 arranged opposite and parallel to the first base plate 11, and connecting rods 13 disposed between the first base plate 11 and the second base plate 12. In this embodiment, the second base plate 12 is generally in an inverted U-shape, allowing a drill rod to pass through the second base plate 12, with the male connector of the drill rod positioned between the first base plate 11 and the second base plate 12. At least three connecting rods 13 are provided, spaced apart in a triangular pattern, so that the first base plate 11 and the second base plate 12 form a stable structure.

[0042] In some embodiments, a plurality of first magnetic members 14 are disposed on the first substrate 11 and / or the second substrate 12 to form a magnetic field between the first and second substrates 11, 12. Because the male drill bit is made of ferromagnetic materials such as iron or iron alloys, the magnetic field between the first and second substrates 11, 12 can magnetize the male drill bit. In this embodiment, the plurality of first magnetic members 14 are mounted on the side of the second substrate 12 opposite the first substrate 11 and are evenly arranged along the inverted U-shaped axis of the second substrate 12.

[0043] Combine Figure 1 and Figure 2 As shown, in some embodiments, a first motor 15 is mounted on a side of the first substrate 11 away from the second substrate 12. The output shaft of the first motor 15 passes through the first substrate 11 and is connected to a turntable 16 for mounting the adjustment assembly 20, so that the turntable 16 rotates around its rotation center.

[0044] refer to Figure 2-4As shown, in some embodiments, the adjustment assembly 20 includes a limit bar 21 disposed radially along the turntable 16, a mounting plate 22 that forms a limiter with the limit bar 21 along the axial direction of the turntable 16, and a cylinder 23 located in the same radial direction as the limit bar 21. A slide rail 24 is rotatably connected to the mounting plate 22 to facilitate the sliding installation of the detection assembly 30. An angle adjustment mechanism 25 is also provided between the slide rail 24 and the mounting plate 22 to facilitate adjusting the inclination angle of the slide rail 24 relative to the rotation axis of the turntable 16.

[0045] Combine Figure 3 and Figure 4 As shown, in some embodiments, the cross-section of the limiting strip 21 is a trapezoidal cross-section. The small end face corresponding to the upper side of the trapezoidal cross-section of the limiting strip 21 is connected to the turntable 16. A chute (not shown) for accommodating the limiting strip 21 is provided on the side of the mounting plate 22 close to the turntable 16, so as to form a limit along the axial direction of the turntable 16 for the mounting plate 22. The cross-section of the chute is a trapezoidal cross-section corresponding to the cross-section of the limiting strip 16. Therefore, the large end face corresponding to the bottom side of the trapezoidal cross-section of the limiting strip 21 can extend to the bottom of the chute, so that a limit along the axial direction of the turntable 16 can be formed between the mounting plate 22 and the limiting strip 21.

[0046] The mounting plate 22 is further provided with a first fixing block 221 rotatably connected to the end of the slide rail 24, and a second fixing block 222 connected to the angle adjustment mechanism 25. The end of the piston rod of the cylinder 23 is provided with a push plate 231 capable of abutting against the first fixing block 221.

[0047] In some embodiments, driven by an external air source, the air cylinder 23 can push the mounting plate 22 axially along the limit bar 21 via the push plate 231 at the end of the piston rod to adjust the distance between the first fixing block 221 and the rotation center of the turntable 16. The first motor 15 can drive the turntable 16 to rotate about the axis of the output shaft of the first motor 15, thereby driving the limit bar 21, the air cylinder 23, the slide rail 24, and the angle adjustment mechanism 25 to rotate about the rotation axis of the turntable 16. By adjusting the distance between the first fixing block 221 and the rotation center of the turntable 16 via the air cylinder 23, the rotation radius of the detection assembly 30 on the slide rail 24 is changed, thereby enabling the detection assembly 30 on the slide rail 24 to detect male connectors of different cross-sectional sizes.

[0048] Recombination Figure 3 and Figure 4As shown, in some embodiments, the angle adjustment mechanism 25 includes a fixing bar 251 fixedly connected to the mounting plate 22, a sliding block 252 axially disposed along the slide rail 24 and mounted on the upper end surface of the slide rail 24, and a pull rod 253 connected to the sliding block 252 and the mounting plate 22. A second motor 254 is mounted on the fixing bar 251, and the output shaft of the second motor 254 passes through the fixing bar 251. A rotating rod 255 is further disposed between the fixing bar 251 and the pull rod 253. One end of the rotating rod 255 is fixedly connected to the output shaft of the second motor 254, and the other end of the rotating rod 255 is rotatably connected to the pull rod 253 via a rotating pin.

[0049] In some embodiments, since the first end of the pull rod 253 is slidably connected and rotationally connected to the sliding block 252, the second end of the pull rod 253 is rotationally connected to the second fixed block 222 on the mounting plate 22. Therefore, when the second motor 254 drives the rotating rod 255 to rotate, the rotating rod 255 can cause the pull rod 253 to rotate with the second end as the center of the circle. At the same time, the first end of the pull rod 253 rotates relative to the sliding block 252 and slides along the axial direction of the sliding block 252, so that the slide rail 24 can rotate with the first fixed block 221 as the center of the circle. Thus, the angle between the axis of the slide rail 24 and the rotation axis of the turntable 16 is adjusted by the second motor 254, so that the detection assembly 30 installed on the slide rail 24 can adapt to the surface of male connectors of different structural types, so as to facilitate the detection of the external threads of male connectors of different structural types.

[0050] refer to Figure 5 As shown, in this embodiment, the upper surface of the sliding block 252 is provided with a sliding groove 2521 along its axial direction, and the sidewalls of the sliding groove 2521 are provided with a through-limiting groove 2522. The first end of the pull rod 253 extends into the sliding groove 2521, and the first end of the pull rod 253 is also provided with a cylindrical limiting block 2531 extending into the limiting groove 2522. This allows the first end of the pull rod 253 to both slide and rotate relative to the sliding block 252. Due to the second end of the pull rod 253 being rotatably connected to the second fixed block 222 on the mounting plate 22, and the rotational and sliding connection between the pull rod 253 and the sliding block 252, the pull rod 253 rotating about the second fixed block 222 can drive the slide rail 24 to rotate about the first fixed block 221.

[0051] refer to Figure 6As shown, in some embodiments, the detection assembly 30 includes a slider 31 slidably connected to the lower surface of the slide rail 24, a mounting base 32 mounted on the lower surface of the slider 31, and a base frame 33 disposed on the lower surface of the mounting base 32. A second magnetic member 34 is provided on the mounting base 32 for exciting the male connector. An adjustment plate 35 is provided on the base frame 33, which is movable along its axial direction and extends perpendicularly to the slider 31. A detection member 36 is connected to the lower edge of the adjustment plate 35. An elastic member 351 is also provided between the adjustment plate 35 and the mounting base 32, with the two ends of the elastic member 351 respectively abutting the upper edge of the adjustment plate 35 and the lower end surface of the mounting base 32. The lower edge of the detection member 36 is configured to have a V-shaped structure that adapts to the thread groove of the male connector so that the detection member 36 can extend well into the thread groove of the male connector. The detection member 36 integrates at least a signal processing circuit and a Hall sensor for detailed detection of the external thread of the male connector. In some preferred embodiments, the adjustment plate 35 and the detection member 36 are connected by a pin 352, so that there is a certain degree of freedom between the adjustment plate 35 and the detection member 36, so that the detection member 36 can better fit the thread of the male connector.

[0052] Combine Figure 1-6 As shown, in a specific embodiment, when the male connector of the truncated cone structure is subjected to thread detection, the cylinder 23 pushes the mounting plate 22 to move axially along the limit bar 21 through the push plate 231 at the end of the piston rod, so that the rotation radius of the slide rail 24 is adapted to the rotation radius of the male connector. The second motor 254 drives the angle adjustment mechanism 25 to make the detection assembly 30 on the slide rail 24 abut against the side wall of the male connector. Specifically, the lower edge of the detection member 36 extends into the thread groove of the male connector. Due to the sliding connection between the base frame 33 and the adjustment plate 35, and the elastic member 351 abutting between the mounting seat 32 and the adjustment plate 35, the contact stress between the detection member 36 and the male connector can be maintained within a suitable range, avoiding damage to the detection member 36. In addition, the regulating effect of the elastic member 351 also reduces the requirement for the rotation accuracy of the second motor 254, thereby improving the applicability of the adjustment assembly 20 and improving the adjustment efficiency of the adjustment assembly 20 to a certain extent. Because the detection member 36 is hingedly connected to the adjustment plate 35 via the pin 352, the detection member 36 is more adaptable to male connectors of different structural types and sizes. Furthermore, the detection member 36 can be adaptively fine-tuned according to the external threads of the male connector, so that the Hall effect sensor can better align with the threads of the male connector, thereby improving the detection accuracy of the Hall effect sensor.

[0053] refer to Figure 1 、 Figure 2 and Figure 7As shown, in some embodiments, the clamping assembly 40 includes a U-shaped fixed frame 41 disposed on the side of the second substrate 12 away from the first substrate 11, a third motor 42 mounted on the fixed frame 41, and a lifting frame 43 disposed on one side of the fixed frame 41. The output shaft of the third motor 42 passes through the fixed frame 41 and is coaxially connected to a bidirectional screw 421. A movable plate 422 is screwed onto each side of the bidirectional screw 421. The movable plates 422 are provided with arc-shaped clamping plates 423, which can fit snugly against the shaft of the drill pipe. By driving the bidirectional screw 421 to rotate, the third motor 42 can move the two movable plates 422 closer together or further apart, thereby facilitating the clamping plates 423 to clamp or release the shaft of the drill pipe. The fixed frame 41 is also provided with a guide rod 411 that passes through the two movable plates 422 to reduce the degrees of freedom of the movable plates 422, so that the movable plates 422 can only move axially along the bidirectional screw 421.

[0054] In some embodiments, the lifting frame 43 includes a correction rod 431 arranged parallel to the axial direction of the drill rod, two telescopic members 432 arranged below the correction rod 431, and a reinforcement rod 433 connecting the two telescopic members 432. The telescopic member 432 includes a compression rod 4321 connected to the correction rod 431 and a sleeve 4323 sleeved on the lower end of the compression rod 4321. A spring 4322 is disposed within the sleeve 4323, with the two ends of the spring 4322 respectively abutting the lower end surface of the compression rod 4321 and the lower end of the sleeve 4323. Before using the clamping assembly 40 to clamp the drill rod, it is necessary to first place the drill rod on the horizontal correction rod 431 to facilitate horizontal positioning of the drill rod. The gravity of the drill rod compresses the spring 4322 through the compression rod 4321, causing the telescopic member 432 to shorten and support the drill rod. At this point, technicians can easily and effortlessly adjust the height and angle of the drill rod, thereby adjusting the position of the male connector at the end of the drill rod between the first base plate 11 and the second base plate 12.

[0055] refer to Figure 1 and Figure 2 As shown, the device for detecting the thread of a drill rod provided by the present invention also includes a power supply 50 for powering, a motor control module 51 installed on the first substrate 11, and a signal transmission module 52. The power supply 50 is electrically connected to the first motor 15, the second motor 254, and the third motor 42 so as to electrically drive the first motor 15, the second motor 254, and the third motor 42. The motor control module 51 is not only electrically connected to the first motor 15, the second motor 254, and the third motor 42, but also electrically connected to the signal transmission module 52. The power supply 50 can electrically drive the first motor 15, the second motor 254, and the third motor 42 according to a specific program of the motor control module 51. The signal transmission module 52 is electrically connected to the signal processing circuit and the Hall sensor integrated on the detection member 36.

[0056] Combine Figure 1-7 As shown, the device for detecting the threads of a drill rod provided by the present invention is used as follows. A clamping assembly 40 is used to secure the drill rod horizontally, with the male connector at its end positioned appropriately between the first base plate 11 and the second base plate 12. Driven by an external air source, the cylinder 23, via the push plate 231 at the end of the piston rod, pushes the mounting plate 22 axially along the limit bar 21 to adjust the distance between the first fixed block 221 and the rotation center of the turntable 16 so that the rotation radius of the detection assembly 30 is compatible with the rotation radius of the male connector. Under the electrical drive of the power supply 50, the second motor 254 drives the rotating rod 255 to rotate, causing the rotating rod 255 to rotate the pull rod 253 about its second end. Simultaneously, the first end of the pull rod 253 slides axially along the sliding block 252, causing the slide rail 24 to rotate about the first fixed block 221. This adjusts the angle of inclination of the slide rail 24 relative to the axis of the turntable 16 so that the lower side of the detection member 36 can be inserted into the thread groove of the male connector. Driven electrically by power source 50, first motor 15 rotates turntable 16, which in turn drives the entire adjustment assembly 20. Guided by the thread grooves, detection member 36 inspects each section of the male connector's external threads and causes slider 31 to move axially along rail 24. If defects such as cracks or corrosion appear anywhere on the male connector's external threads, the Hall effect sensor on detection member 36 detects the difference in magnetic field at the defective thread location and then outputs a signal through the signal processing circuit. This enables thread detection of the male connector on the drill pipe.

[0057] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; they may refer to mechanical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0059] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A device for detecting the thread of a drill rod, comprising: a frame assembly (10) configured to receive the male connector of the drill pipe in a magnetic field; An adjustment assembly (20) includes a mounting plate (22) mounted on a turntable (16) of the frame assembly (10), and a slide rail (24) rotatably connected to the mounting plate (22), and an angle adjustment mechanism (25) is provided between the slide rail (24) and the mounting plate (22); and A detection assembly (30) is slidably connected to the slide rail (24). in, The mounting plate (22) is configured to be able to change the eccentricity between the mounting plate (22) and the rotating plate (16). The angle adjustment mechanism (25) is configured to adjust the angle of the slide rail (24) relative to the axis of the male connector, so that the detection assembly (30) can extend into the thread groove of the male connector.

2. The device for detecting the thread of a drill rod according to claim 1, characterized in that: A limit strip (21) is provided on the surface of the rotating disk (16), and a cylinder (23) is arranged along the axial direction of the limit strip (21). The cylinder (23) is configured to push the mounting plate (22) to move relative to the rotating plate (16) along the axial direction of the limiting strip (21) to change the eccentricity between the mounting plate (22) and the rotating plate (16).

3. The device for detecting the thread of a drill rod according to claim 1, characterized in that: The angle adjustment mechanism (25) includes a sliding block (252) mounted on a slide rail (24), and a pull rod (253) connected to the mounting plate (22) and the sliding block (252), wherein a first end of the pull rod (253) is slidably and rotationally connected to the sliding block (252), and a second end of the pull rod (253) is rotationally connected to the mounting plate (22). When the pull rod (253) rotates around the second end, the limiting block (2531) at the first end rolls in the limiting groove (2522) of the sliding block (252), so that the slide rail (24) can rotate around the mounting plate (22).

4. The device for detecting the thread of a drill rod according to claim 3, characterized in that: The angle adjustment mechanism (25) further comprises a fixing bar (251) fixedly connected to the mounting plate (22), a second motor (254) mounted on the fixing bar (251), and a rotating rod (255) coaxially connected to an output shaft of the second motor (254). The rotating rod (255) is rotatably connected to the pull rod (253), so that the second motor (254) can drive the pull rod (253) to rotate around the second end through the rotating rod (255).

5. The device for detecting the thread of a drill rod according to claim 1, characterized in that: The detection assembly (30) includes a slider (31) slidably mounted on the slide rail (24), and a detection member (36) mounted on the slider (31), wherein the detection member (36) is configured to extend into the thread groove of the male connector and to move axially along the slide rail (24) under the guidance of the thread groove.

6. The device for detecting the thread of a drill rod according to claim 5, characterized in that: The slider (31) is provided with an adjustment plate (35) for mounting the detection member (36); the adjustment plate (35) can, under the action of elastic force, enable the detection member (36) to extend into the thread groove of the male connector.

7. The device for detecting the thread of a drill rod according to claim 6, characterized in that: The slider (31) is provided with a mounting seat (32), and the mounting seat (32) is provided with a base frame (33) slidably connected to the adjustment plate (35). An elastic member (351) abuts between the adjustment plate (35) and the mounting seat (32), so that the adjustment plate (35) can move axially along the base frame (33).

8. The device for detecting the thread of a drill rod according to any one of claims 1 to 7, characterized in that: The frame assembly (10) comprises a first substrate (11) and a second substrate (12) arranged in parallel and at intervals, a first magnetic member (14) for generating the magnetic field is mounted on the first substrate (11) and / or the second substrate (12), and a plurality of connecting rods (13) are further arranged between the first substrate (11) and the second substrate (12) to form a stable structure for accommodating the male connector in the magnetic field.

9. The device for detecting the thread of a drill rod according to claim 8, characterized in that: A first motor (15) is mounted on the first substrate (11), and an output shaft of the first motor (15) passes through the first substrate (11) and is connected to the turntable (16), so that the adjustment component (20) and the detection component (30) can rotate around the axis of the male connector.

10. The device for detecting the thread of a drill rod according to claim 8, characterized in that: The invention also includes a clamping assembly (40) arranged beside the second base plate (12), comprising a fixing frame (41), a third motor (42) mounted on the fixing frame (41), and a bidirectional screw rod (421) and a guide rod (411) connected to the fixing frame (41), wherein the guide rod (411) passes through a movable plate (422) screwed to the bidirectional screw rod (421). The third motor (42) is configured to drive the bidirectional screw (421) to rotate, so that the movable plates (422) can move away from or closer to each other, so that the movable plates (422) release or clamp the drill rod.

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