Clamping tool for magnetic flux leakage flaw detection of oil drill rod

Abstract

The utility model relates to the field of magnetic flux leakage flaw detection of oil drill rods, discloses a clamping tool for magnetic flux leakage flaw detection of oil drill rods, and solves the problem that the existing clamping tool for magnetic flux leakage flaw detection of oil drill rods is poor in adjusting effect. According to the utility model, the circular ring, the gears, the screw rod, the sleeve, the clamping plate, the push plate and the oil rod are inserted and detected through the flaw detection cavity, and the gears drive the screw rod by operating the extension plate on the clamping block to slide in the groove, the push plate slides in the groove, the circular ring rotates, the gear ring rotates and the gear ring is meshed with the plurality of groups of gears; the sleeve drives the arc-shaped clamping plates to be close to each other, the protruding plates on the inner sides of the clamping plates make contact with the surface of the oil rod, the clamping stability is enhanced, the extension plate rotates to be perpendicular to the push plate through the hinge, the magnet blocks on the extension plate attract the magnet rings on the surface of the circular ring in a heteropole mode, and it is guaranteed that the push plate is fixed and not loosened.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic flux leakage flaw detection for oil drill pipes, and particularly relates to a clamping tooling for magnetic flux leakage flaw detection of oil drill pipes. Background Technique

[0002] In order to ensure the stable clamping of the drill pipe during the magnetic flux leakage flaw detection of the oil drill pipe and avoid inaccurate detection results caused by the movement or shaking of the drill pipe during the detection, a clamping tooling for magnetic flux leakage flaw detection of the oil drill pipe is required. For example, in the patent with the publication number CN210442314U, a discharge clamping block is arranged on one side of the flaw detection cavity, a feed inlet is arranged on the other side of the flaw detection cavity, a slide rail is arranged on one side of the discharge clamping block, and a flared port is arranged on one side of the feed inlet. The above-mentioned comparative patent clamps and fixes the oil rod through the clamping block. However, the size of the clamping block is fixedly set, and it is difficult to better clamp and fix oil rods with different diameters, resulting in poor flexibility. Content of the Utility Model

[0003] The purpose of the utility model is to provide a clamping tooling for magnetic flux leakage flaw detection of oil drill pipes. By using this device for work, the problem of poor adjustment effect of the existing clamping tooling for magnetic flux leakage flaw detection of oil drill pipes is solved.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A clamping tooling for magnetic flux leakage flaw detection of oil drill pipes, including a clamping block, a flaw detection cavity opened on one side of the clamping block, an oil rod penetrating through the inside of the flaw detection cavity, a driving structure and a fixing structure are arranged inside the clamping block, and a limiting structure is arranged on one side of the driving structure;

[0005] The driving structure includes a circular ring arranged inside the clamping block, a gear ring is slidably connected inside the circular ring, and a gear is meshed on one side of the gear ring;

[0006] The fixing structure includes a screw rod arranged on one side of the gear, a sleeve is threadedly connected to one side of the screw rod, and a clamping plate is arranged on one side of the sleeve.

[0007] Furthermore, a sliding groove is opened inside the circular ring, a sliding ring is slidably connected inside the sliding groove, and the sliding ring is connected to the gear ring.

[0008] Furthermore, one side of the screw rod is rotatably connected to a connecting plate, and the connecting plate is connected to the circular ring.

[0009] Furthermore, four groups of the gears, screw rods and sleeves are respectively arranged at equal intervals, and the four groups of gears, screw rods and sleeves are driven simultaneously.

[0010] Furthermore, the clamping plate is arc-shaped, and convex plates are arranged on the inner side of the clamping plate at equal intervals.

[0011] Further, the limiting structure includes a groove formed on the outer surface of the circular ring, and the groove communicates with the sliding groove.

[0012] Further, a push plate is slidably connected inside the groove, and the push plate is connected to the sliding ring.

[0013] Further, a hinge is provided on one side of the push plate, an extension plate is rotatably connected to one side of the hinge, a magnet block is provided at one end of the extension plate, a magnetic ring is provided on the outer surface of the circular ring, the length of the magnetic ring is the same as that of the groove, and the magnet block and the magnetic ring attract each other with opposite polarities.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] A clamping tool for magnetic flux leakage detection of oil drill pipes proposed by the present utility model has a poor adjustment effect for the existing clamping tool for magnetic flux leakage detection of oil drill pipes; while the present utility model inserts the oil rod through the circular ring, gear, screw rod, sleeve, clamping plate and push plate, and the oil rod is inserted and detected through the detection cavity. By operating the extension plate on the clamping block to slide in the groove, the sliding of the push plate in the groove, the rotation of the circular ring, the rotation of the gear ring and the meshing with multiple groups of gears, the gear then drives the screw rod, so that the sleeve drives the arc-shaped clamping plates to approach each other, and the convex plate on the inner side of the clamping plate contacts the surface of the oil rod, enhancing the clamping stability. The extension plate rotates through the hinge to be perpendicular to the push plate, and the magnet block on it attracts the magnetic ring on the surface of the circular ring with opposite polarities, ensuring that the push plate is fixed without loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view structural schematic diagram of the whole of the present utility model;

[0017] Figure 2 is a three-dimensional structural schematic diagram of the driving structure, fixed structure and limiting structure of the present utility model;

[0018] Figure 3 is a three-dimensional structural schematic diagram of the fixed structure of the present utility model;

[0019] Figure 4 is a three-dimensional structural schematic diagram of the driving structure of the present utility model;

[0020] Figure 5 is a three-dimensional structural schematic diagram of the limiting structure of the present utility model.

[0021] In the figure: 1. Clamping block; 2. Flaw detection cavity; 3. Oil rod; 4. Driving structure; 41. Ring; 42. Chute; 43. Slip ring; 44. Gear ring; 45. Gear; 5. Fixing structure; 51. Screw; 52. Sleeve; 53. Connecting plate; 54. Clamping plate; 55. Convex plate; 6. Limiting structure; 61. Groove; 62. Push plate; 63. Hinge; 64. Extension plate; 65. Magnet block; 66. Magnetic ring. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0023] To further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings.

[0024] Combined with Figures 1-5 , a clamping tool for magnetic flux leakage flaw detection of oil drill pipes includes a clamping block 1, a flaw detection cavity 2 opened on one side of the clamping block 1, an oil rod 3 penetrating through the inside of the flaw detection cavity 2. A driving structure 4 and a fixing structure 5 are arranged inside the clamping block 1, and a limiting structure 6 is arranged on one side of the driving structure 4.

[0025] The present invention will be further described below in conjunction with the embodiments.

[0026] Embodiment 1:

[0027] Please refer to Figures 1-5 , the driving structure 4 includes a ring 41 arranged inside the clamping block 1, a gear ring 44 is slidably connected inside the ring 41, and a gear 45 is meshed on one side of the gear ring 44;

[0028] The fixing structure 5 includes a screw 51 arranged on one side of the gear 45, a sleeve 52 is threadedly connected to one side of the screw 51, a clamping plate 54 is arranged on one side of the sleeve 52, a connecting plate 53 is rotatably connected to one side of the screw 51, the connecting plate 53 is connected to the ring 41, the clamping plate 54 is arc-shaped, and a convex plate 55 is arranged on the inner side of the clamping plate 54. A number of convex plates 55 are arranged at equal intervals to improve the clamping stability.

[0029] A chute 42 is opened inside the ring 41, a slip ring 43 is slidably connected inside the chute 42, the slip ring 43 is connected to the gear ring 44, and four groups of the gears 45, screws 51 and sleeves 52 are respectively arranged at equal intervals. The four groups of the gears 45, screws 51 and sleeves 52 are driven simultaneously for convenient adjustment.

[0030] The limiting structure 6 includes a groove 61 formed on the outer surface of the circular ring 41. The groove 61 communicates with the sliding groove 42. A push plate 62 is slidably connected inside the groove 61. The push plate 62 is connected to the sliding ring 43. A hinge 63 is provided on one side of the push plate 62. One side of the hinge 63 is rotatably connected to an extension plate 64. A magnet block 65 is provided at one end of the extension plate 64. A magnetic ring 66 is provided on the outer surface of the circular ring 41. The length of the magnetic ring 66 is the same as that of the groove 61. The magnet block 65 and the magnetic ring 66 attract each other with opposite polarities to fix the push plate 62 and prevent it from loosening.

[0031] Specifically, first insert the oil rod 3, then detect it through the flaw detection cavity 2. Then, grasp the extension plate 64 protruding from one side of the clamping block 1 and slide it out of the groove 61. Since one end of the extension plate 64 is hinged to the push plate 62 through the hinge 63, the push plate 62 slides in the groove 61. The push plate 62 drives the sliding ring 43 connected to one end to slide in the sliding groove 42 formed inside the circular ring 41, thereby driving the gear ring 44 connected to the circular ring 41 to rotate a quarter of a turn. The rotation of the gear ring 44 meshes with a plurality of groups of gears 45 on one side. One end of each of the plurality of groups of gears 45 is rotatably connected to the connecting plate 53. The connecting plate 53 is connected to the circular ring 41. The gears 45 respectively drive the screw rods 51 at one end to rotate. The screw rods 51 are threadedly connected to the sleeves 52. Each of the plurality of sleeves 52 drives the arc-shaped clamping plates 54 at one end. The clamping plates 54 approach each other. A plurality of convex plates 55 are equidistantly arranged on the inner side of the clamping plates 54. When the clamping plates 54 clamp the oil rod 3, the plurality of convex plates 55 come into contact with the surface of the oil rod 3, increasing the friction force and improving the clamping stability. Then, rotate the extension plate 64 through the hinge 63 to be perpendicular to the push plate 62. The magnet block 65 at one end of the extension plate 64 attracts the arc-shaped magnetic ring 66 on the surface of the circular ring 41 with opposite polarities to fix the push plate 62 and prevent it from loosening.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping tool for magnetic flux leakage detection of oil drill pipes, comprising a clamping block (1), a flaw detection cavity (2) provided on one side of the clamping block (1), an oil rod (3) passing through the flaw detection cavity (2), and characterized in that: A driving structure (4) and a fixing structure (5) are arranged inside the clamping block (1), and a limiting structure (6) is arranged on one side of the driving structure (4); The driving structure (4) comprises a circular ring (41) arranged inside the clamping block (1), a gear ring (44) is slidably connected inside the circular ring (41), and a gear (45) is meshed on one side of the gear ring (44); The fixing structure (5) comprises a screw rod (51) arranged on one side of the gear (45), one side of the screw rod (51) is threadedly connected with a sleeve (52), and one side of the sleeve (52) is provided with a clamping plate (54).

2. The clamping tool for magnetic flux leakage detection of oil drill pipe according to claim 1, characterized in that: A sliding groove (42) is provided inside the circular ring (41), a sliding ring (43) is slidably connected inside the sliding groove (42), and the sliding ring (43) is connected to a gear ring (44).

3. The clamping tool for magnetic leakage detection of oil drill pipe according to claim 1, characterized in that: One side of the screw rod (51) is rotatably connected to a connecting plate (53), and the connecting plate (53) is connected to the circular ring (41).

4. The clamping tool for magnetic flux leakage detection of oil drill pipe according to claim 1, characterized in that: The gears (45), screws (51) and sleeves (52) are respectively arranged in four groups at equal intervals, and the four groups of gears (45), screws (51) and sleeves (52) are driven simultaneously.

5. The clamping tool for magnetic flux leakage detection of oil drill pipe according to claim 1, characterized in that: The clamping plate (54) is arc-shaped, and a convex plate (55) is arranged on the inner side of the clamping plate (54), and a plurality of convex plates (55) are arranged at equal intervals.

6. The clamping tool for magnetic flux leakage detection of oil drill pipe according to claim 1, characterized in that: The limiting structure (6) comprises a groove (61) provided on the outer surface of the circular ring (41), and the groove (61) is connected to the sliding groove (42).

7. A clamping tool for magnetic flux leakage detection of oil drill pipe according to claim 6, characterized in that: A push plate (62) is slidably connected inside the groove (61), and the push plate (62) is connected to the slip ring (43).

8. The clamping tool for magnetic flux leakage detection of oil drill pipe according to claim 7, characterized in that: A hinge (63) is provided on one side of the push plate (62), and an extension plate (64) is rotatably connected to one side of the hinge (63). A magnet block (65) is provided on one end of the extension plate (64). A magnetic ring (66) is provided on the outer surface of the circular ring (41). The length of the magnetic ring (66) is consistent with that of the groove (61), and the magnet block (65) and the magnetic ring (66) attract each other with opposite poles.

Images