Portable variable-diameter drill rod screw thread automatic scanning device

Abstract

The utility model discloses a portable variable-diameter drill rod screw thread automatic scanning device, and relates to the technical field of drill rod nondestructive testing devices. The two magnetic attraction wheels are attracted to the outer surface of the drill rod, radial positioning of the scanning device and the drill rod is achieved, and the relative position of the floating profiling mechanism and the drill rod is guaranteed. The floating profiling mechanism can be well attached to a thread through a profiling block and can float up and down, and the movement stability is guaranteed. The scanning device disclosed by the utility model has the detection characteristics of light weight, convenience in carrying and operation and capability of carrying out field operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill rod nondestructive testing devices, and more specifically relates to a portable variable-diameter drill rod thread automatic scanning device. Background Art

[0002] The drill pipe is the core component in the drilling process. There are female joint threads and male joint threads at both ends. The drill pipes are connected to each other through threads to form a drill pipe system. During the drilling service, the drill pipe not only needs to withstand complex alternating stresses such as tension, compression, bending, and torsion, but also suffers from corrosion, wear, temperature and pressure changes. Among them, corrosion fatigue is the main failure form, and it mainly occurs at the root of the 1~3 threads of the drill pipe thread.

[0003] Due to the particularity of the drill pipe thread structure, the defect detection space is extremely small, the operation is difficult, and the defects that may appear in the thread area are complex and diverse, and the defect positions are also different, which poses a huge challenge to the detection of drill pipe thread defects. At present, the most widely used methods for drill pipe thread defect detection in the market include magnetic particle detection, ultrasonic detection, eddy current detection, and magnetic flux leakage detection. These detection methods are suitable for different detection environments, and each has its own advantages and limitations. The applicable detection objects are also different, and each has its own different detection standards. Among them, magnetic particle detection and ultrasonic detection are relatively common, but they require professionals to perform detection operations, and the detection results are easily affected by human factors, and it is difficult to achieve high sensitivity detection of defects; eddy current detection and magnetic flux leakage detection are more common drill pipe thread defect detection methods. Both detection methods require the detection sensor and the thread to have a good fit to achieve a good detection effect. However, the drill pipe thread is a tapered thread with a complex structure, and it is difficult to determine the relative position between the detection sensor and the thread, resulting in poor results when the eddy current detection method and the magnetic flux leakage detection method are applied to the detection of drill pipe threads. Utility Model Content

[0004] In order to overcome the defects and shortcomings in the above-mentioned prior art, the utility model provides a portable variable-diameter drill pipe thread automatic scanning device. The invention purpose of the utility model is to overcome the shortcomings of the prior art and provide a portable variable-diameter drill pipe thread automatic scanning device, so that the overall device has a simple structure, is lightweight and portable, and can perform scanning movements for drill pipe threads of different specifications. The utility model uses two magnetic wheels to be adsorbed on the outer surface of the drill pipe to achieve radial positioning of the scanning device and the drill pipe, thereby ensuring the relative position of the floating profiling mechanism and the drill pipe. The floating profiling mechanism can utilize the profiling block to achieve a better fit with the thread, and can float up and down to ensure movement stability. The scanning device of the utility model has the characteristics of being lightweight, easy to carry and operate, and can be used for field operations.

[0005] In order to solve the above problems existing in the prior art, the utility model is implemented through the following technical solutions.

[0006] The utility model provides a portable variable-diameter drill pipe thread automatic scanning device, which comprises an arc frame, magnetic wheels are respectively arranged at both ends of the arc frame, a driving mechanism for driving the magnetic wheels to rotate is arranged on the arc frame, the driving mechanism drives the magnetic wheels to rotate, and drives the arc frame to rotate around the drill pipe; a mounting plate extending in the direction of the drill pipe thread is arranged on the arc frame, a floating profiling mechanism is slidably arranged on the mounting plate, a profiling block cooperating with the drill pipe thread is arranged at the bottom of the floating profiling mechanism, when the arc frame rotates around the drill pipe, the floating profiling mechanism is forced to passively rotate around the drill pipe thread, spirally moves relative to the drill pipe, and slides relative to the mounting plate.

[0007] Further preferably, the floating profiling mechanism is adjusted relative to the mounting plate to be closer to the thread or farther away from the thread.

[0008] More preferably, the floating profiling mechanism and the mounting plate are slidably connected together via a slider and rail structure.

[0009] More preferably, the slide rail is fixedly mounted on the mounting plate, the slider is slidably connected to the slide rail, and the floating profiling mechanism is connected to the slider via a detachable pad.

[0010] Further preferably, the floating profiling mechanism also includes a profiling fixing plate, which is provided with a mounting groove for assembling the profiling block, a compression spring member is arranged in the mounting groove, one end of the compression spring member is connected to the bottom of the mounting groove, and the other end is connected to the profiling block.

[0011] More preferably, the mounting slot is a slot hole penetrating the profiling fixing plate, a cover plate is provided on the other side of the slot hole opposite to the profiling block, one end of the compression spring member is connected to the cover plate, and the other end is connected to the profiling block.

[0012] Further preferably, the magnetic attraction wheel comprises an annular magnet and iron rings mounted on both ends of the annular magnet.

[0013] Further preferably, the driving mechanism is a driving motor.

[0014] Further preferably, a battery for providing power to the driving mechanism is disposed on the arc frame.

[0015] Further preferably, a handle is provided on the arc-shaped frame.

[0016] More preferably, the battery is located below the handle of the arc-shaped frame.

[0017] Compared with the prior art, the beneficial technical effects brought by the utility model are as follows:

[0018] 1. The utility model realizes radial positioning of the scanning device and the drill rod by adsorbing two magnetic wheels on the outer surface of the drill rod, thereby ensuring the relative position of the floating profiling mechanism and the drill rod. At the same time, the driving mechanism drives one or both magnetic wheels to rotate, so that the scanning device can rotate around the drill rod, realizing automatic scanning and rotation of the scanning device. The setting of the arc frame can also adapt to drill rods of different specifications. The floating profiling mechanism uses the profiling block to achieve a better match with the drill rod thread. Through the sliding match between the floating profiling mechanism and the mounting plate, the floating profiling mechanism can float up and down relative to the mounting plate to ensure movement stability.

[0019] 2. The floating profiling mechanism in the utility model is adjusted relative to the mounting plate to be close to or away from the drill rod thread, thereby ensuring the fit between the floating profiling block and the drill rod thread and realizing the scanning movement of drill rod threads of different specifications.

[0020] 3. The utility model realizes the sliding connection between the floating profiling mechanism and the mounting plate by means of a slider rail, and realizes the connection between the floating profiling mechanism and the slider by means of a detachable pad. The pads of different thicknesses can be replaced to adapt to drill rods of different sizes.

[0021] 4. The mounting groove is arranged on the profiling fixing plate of the floating profiling mechanism in the utility model, and the profiling block is assembled in the mounting groove. On the one hand, the stable operation of the profiling block is ensured without deviation, and on the other hand, the compressive elastic member is arranged to ensure that the profiling block can be close to the drill rod thread, so that the profiling block can automatically be close to the thread as the diameter of the drill rod thread is reduced. The fitting of the floating profiling block and the thread is ensured, and the scanning movement of drill rod threads of different specifications is realized.

[0022] 5. The magnetic wheel described in the utility model is composed of an annular magnet and iron rings at both ends thereof. The two end faces of the annular magnet are respectively N-grade and S-grade, forming a magnetic circuit with the iron ring to increase attraction and adsorb on the surface of the drill rod.

[0023] 6. The utility model is provided with a battery to power the driving mechanism, which is convenient for field use and does not require additional power supply. The battery is integrated into the scanning device, which ultimately makes the scanning device lightweight, highly automated, easy to carry and operate, and can be used for field operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the matching assembly structure of the scanning device and the drill rod of the utility model;

[0025] Figure 2 It is a comparative schematic diagram of the scanning device of the utility model placed on drill rods of different specifications;

[0026] Figure 3It is a structural schematic diagram of the floating profiling mechanism in the scanning device of the utility model;

[0027] Figure 4 It is a schematic diagram of the structure of the magnetic wheel in the scanning device of the utility model;

[0028] Figure numerals: 1. arc frame, 2. magnetic wheel, 3. driving mechanism, 4. drill rod, 5. drill rod thread, 6. mounting plate, 7. floating profiling mechanism, 8. profiling block, 9. slide rail, 10. slider, 11. pad, 12. profiling fixing plate, 13. mounting groove, 14. compression spring member, 15. cover plate, 16. annular magnet, 17. iron ring, 18. battery, 19. handle. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings. In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] As a preferred embodiment of the present invention, refer to the attached specification Figure 1 and attached Figure 2 As shown, the present embodiment discloses a portable variable-diameter drill pipe thread automatic scanning device, the device comprises an arc frame 1, magnetic wheels 2 are respectively arranged at both ends of the arc frame 1, a driving mechanism 3 for driving the magnetic wheel 2 to rotate is mounted on the arc frame 1, the driving mechanism 3 drives the magnetic wheel 2 to rotate, and drives the arc frame 1 to rotate around the drill pipe 4; a mounting plate 6 extending in the direction of the drill pipe thread 5 is arranged on the arc frame 1, a floating profiling mechanism 7 is slidably mounted on the mounting plate 6, a profiling block 8 cooperating with the drill pipe thread 5 is arranged at the bottom of the floating profiling mechanism 7, when the arc frame 1 rotates around the drill pipe 4, the floating profiling mechanism 7 is forced to passively rotate around the drill pipe thread 5, spirally moves relative to the drill pipe 4, and slides relative to the mounting plate 6.

[0032] In this embodiment, the two magnetic wheels 2 are adsorbed on the outer surface of the drill rod 4 to achieve radial positioning of the scanning device and the drill rod 4, thereby ensuring the relative position of the floating profiling mechanism 7 and the drill rod 4. At the same time, the driving mechanism 3 drives one or both of the magnetic wheels 2 to rotate, so that the scanning device can rotate around the drill rod 4, thereby achieving automatic scanning and rotation of the scanning device. The setting of the arc frame 1 can also be adapted to drill rods 4 of different specifications. The floating profiling mechanism 7 uses the profiling block 8 to achieve a better fit with the thread of the drill rod 4. Through the sliding fit between the floating profiling mechanism 7 and the mounting plate 6, the floating profiling mechanism 7 can float up and down relative to the mounting plate 6 to ensure movement stability.

[0033] As an example, a detection sensor is mounted on the profiling block 8 to ensure the determination of the relative position between the detection sensor and the drill rod thread 5 .

[0034] As another example, the profiling block 8 itself is a detection sensor using an eddy current detection method or a magnetic flux leakage detection method.

[0035] Example 2

[0036] As another preferred embodiment of the utility model, this embodiment is based on the above-mentioned embodiment 1, and further supplements and explains the technical solution of the utility model in detail. Figure 1 As shown, the floating profiling mechanism 7 is adjusted to be close to or away from the thread relative to the mounting plate 6. This ensures that the floating profiling block 8 fits the drill rod thread 5, and realizes the scanning movement of drill rod threads 5 of different specifications.

[0037] As an implementation method of this embodiment, in order to achieve the adjustment of the floating profiling mechanism 7 to be close to or away from the thread relative to the mounting plate 6, the following structure is specifically adopted, wherein the floating profiling mechanism 7 and the mounting plate 6 are slidably connected together through the slider 10 and the slide rail 9 structure. The slide rail 9 is fixedly mounted on the mounting plate 6, the slider 10 is slidably connected to the slide rail 9, and the floating profiling mechanism 7 is connected to the slider 10 through a detachable pad 11. The pad 11 of different thicknesses can be replaced to adapt to drill rods 4 of different sizes.

[0038] Example 3

[0039] As another preferred embodiment of the utility model, this embodiment is based on the above-mentioned embodiment 1 or embodiment 2, and further supplements and explains the technical solution of the utility model in detail. Figure 3 As shown, the floating profiling mechanism 7 also includes a profiling fixing plate 12, on which a mounting groove 13 for assembling the profiling block 8 is provided, and a compression spring member 14 is provided in the mounting groove 13, one end of the compression spring member 14 is connected to the bottom of the mounting groove 13, and the other end is connected to the profiling block 8.

[0040] Furthermore, the mounting slot 13 is a slot hole penetrating the profiling fixing plate 12 , and a cover plate 15 is provided on the other side of the slot hole relative to the profiling block 8 . One end of the compression spring member 14 is connected to the cover plate 15 , and the other end is connected to the profiling block 8 .

[0041] In this embodiment, the profiling block 8 is assembled in the installation groove 13, which ensures the stable operation of the profiling block 8 without deviation, and ensures that the profiling block 8 can be close to the drill rod thread 5 by setting the compression elastic member, so that the profiling block 8 can automatically be close to the thread as the diameter of the drill rod thread 5 decreases. The floating profiling block 8 is ensured to fit the thread, and the scanning movement of drill rod threads 5 of different specifications is realized.

[0042] Example 4

[0043] As another preferred embodiment of the present utility model, this embodiment is a further detailed supplement and elaboration of the technical solution of the present utility model based on the above-mentioned embodiment 1, embodiment 2 or embodiment 3. Figure 4 As shown, the magnetic wheel 2 includes an annular magnet 16 and iron rings 17 mounted at both ends of the annular magnet 16. The two end faces of the annular magnet 16 are respectively N-grade and S-grade, forming a magnetic circuit with the iron ring 17 to increase the attraction and adsorb on the surface of the drill rod 4.

[0044] As an example, the driving mechanism 3 is a driving motor. The arc frame 1 is provided with a battery 18 for providing power to the driving mechanism 3. The arc frame 1 is provided with a handle 19. The battery 18 is located below the handle 19 of the arc frame 1. It is convenient for field use and does not require additional power supply. The battery 18 is integrated in the scanning device, which ultimately makes the scanning device lightweight, highly automated, easy to carry and operate, and can be used for field operation.

[0045] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable variable diameter drill pipe thread automatic scanning device, characterized in that: The invention comprises an arc frame (1), wherein magnetic wheels (2) are respectively arranged at both ends of the arc frame (1), and a driving mechanism (3) for driving the magnetic wheel (2) to rotate is arranged on the arc frame (1), and the driving mechanism (3) drives the magnetic wheel (2) to rotate, thereby driving the arc frame (1) to rotate around a drill rod (4); a mounting plate (6) extending in the direction of a drill rod thread (5) is arranged on the arc frame (1), and a floating profiling mechanism (7) is slidably arranged on the mounting plate (6), and a profiling block (8) cooperating with the drill rod thread (5) is arranged at the bottom of the floating profiling mechanism (7), and when the arc frame (1) rotates around the drill rod (4), the floating profiling mechanism (7) is forced to passively rotate around the drill rod thread (5), spirally moves relative to the drill rod (4), and slides relative to the mounting plate (6).

2. A portable variable diameter drill pipe thread automatic scanning device as claimed in claim 1, characterized in that: The floating profiling mechanism (7) is adjusted relative to the mounting plate (6) to be close to the thread or away from the thread.

3. A portable variable diameter drill pipe thread automatic scanning device as claimed in claim 2, characterized in that: The floating profiling mechanism (7) and the mounting plate (6) are slidably connected together via a slider (10) and a slide rail (9) structure.

4. A portable variable diameter drill pipe thread automatic scanning device as claimed in claim 3, characterized in that: The slide rail (9) is fixedly mounted on the mounting plate (6), the slider (10) is slidably connected to the slide rail (9), and the floating profiling mechanism (7) is connected to the slider (10) via a detachable cushion block (11).

5. A portable variable diameter drill pipe thread automatic scanning device according to any one of claims 1 to 4, characterized in that: The floating profiling mechanism (7) further comprises a profiling fixing plate (12), the profiling fixing plate (12) being provided with a mounting groove (13) for assembling the profiling block (8), a compression spring member (14) being arranged in the mounting groove (13), one end of the compression spring member (14) being connected to the bottom of the mounting groove (13), and the other end being connected to the profiling block (8).

6. A portable variable diameter drill pipe thread automatic scanning device as claimed in claim 5, characterized in that: The mounting groove (13) is a slot hole penetrating the profiling fixing plate (12), a cover plate (15) is provided on the other side of the slot hole opposite to the mounting profiling block (8), one end of the compression spring member (14) is connected to the cover plate (15), and the other end is connected to the profiling block (8).

7. A portable variable diameter drill pipe thread automatic scanning device according to any one of claims 1 to 4, characterized in that: The magnetic attraction wheel (2) comprises an annular magnet (16) and iron rings (17) mounted on both ends of the annular magnet (16).

8. A portable variable diameter drill pipe thread automatic scanning device according to any one of claims 1 to 4, characterized in that: The driving mechanism (3) is a driving motor.

9. A portable variable diameter drill pipe thread automatic scanning device as claimed in claim 8, characterized in that: The arc-shaped frame (1) is provided with a battery (18) for providing power to the driving mechanism (3).

10. A portable variable diameter drill pipe thread automatic scanning device as claimed in claim 9, characterized in that: A handle (19) is provided on the arc-shaped frame (1); the battery (18) is located below the handle (19) of the arc-shaped frame (1).

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