Seamless steel tube leakage point detection device

Abstract

The utility model discloses a seamless steel pipe leakage point detection device, which relates to the technical field of steel pipes and comprises a support, two rotating shafts are rotatably arranged on the inner side of the upper end of the support, limiting blocks are fixedly arranged in the middles of the two rotating shafts, cylindrical positioning rings are rotatably arranged on the inner sides of the limiting blocks, and steel pipes are inserted into the positioning rings. Fixing sleeves for fixing a steel pipe are fixedly arranged at two ends of the positioning ring, a mounting block for fixing a positive electrode is arranged in the steel pipe, and a positioning assembly is arranged at the upper end of the limiting block. According to the utility model, by arranging the rotatable positioning ring, after the steel pipe is inserted into the positioning ring, the positioning ring is rotated, and due to the fact that a plurality of clamping grooves are symmetrically formed in the positioning ring and the clamping grooves are matched with the positioning assembly, the angles at which the positioning ring drives the steel pipe to rotate are the same, and positive electrodes in the steel pipe can be detected orderly; therefore, the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of steel pipes, in particular to a leakage point detection device for seamless steel pipes. Background Art

[0002] Steel pipe is one of the commonly used metal profiles; when transporting crude oil, slurry, seawater, desalinated seawater, corrosive sewage, saturated water vapor and other media, it is necessary to use steel pipes with corrosion-resistant coatings to improve the safety of the steel pipes at work.

[0003] For the detection of leaks, the positive and negative electrodes of an electric spark leak detector are usually used. The negative electrode is overlapped on the outer wall of the steel pipe, and the positive electrode is inserted into the lumen of the steel pipe through an extension rod. When the positive electrode is overlapped on the inner wall of the steel pipe, if the overlap is coated with a corrosion-resistant coating, the positive and negative electrodes cannot be conductive. On the contrary, if the overlap is not coated with a corrosion-resistant coating and a leak is formed, the positive electrode is conductive to the negative electrode through the steel pipe itself.

[0004] At present, when detecting leaks in seamless steel pipes, due to the limited contact area between the positive electrode and the inner wall of the steel pipe, the positive electrode is fitted to the inner wall of the steel pipe, passed through the inner wall of the steel pipe, and the steel pipe is rotated to allow the positive electrode to contact other parts, and the cycle continues. This operation method cannot determine the rotation angle, whether the positive electrode is located at the inner wall position that has not been detected, affecting the detection accuracy. Utility Model Content

[0005] The utility model aims to solve the defect of poor precision of seamless steel pipe leakage detection in the prior art and proposes a seamless steel pipe leakage detection device.

[0006] In order to solve the problems existing in the prior art, the utility model adopts the following technical solutions:

[0007] A seamless steel pipe leakage detection device comprises a bracket, two rotating shafts are rotatably provided on the inner side of the upper end of the bracket, limit blocks are fixedly provided in the middle of the two rotating shafts, a cylindrical positioning ring is rotatably provided on the inner side of the limit block, a steel pipe is inserted in the positioning ring, fixing sleeves for fixing the steel pipe are fixed at both ends of the positioning ring, a mounting block for fixing the positive electrode is provided in the steel pipe, and a positioning assembly is provided on the upper end of the limit block.

[0008] Preferably, the positioning assembly includes a fixed frame installed on the upper end of the limit block, a connecting frame is fixedly provided on the upper surface of the fixed frame, a pull rod is slidably provided on the connecting frame, a clamping block is fixedly provided at the lower end of the pull rod, the lower end of the clamping block passes through the fixed frame, a spring is sleeved on the pull rod, and a plurality of clamping grooves are symmetrically opened on the outer wall of the positioning ring.

[0009] Preferably, a motor is fixedly provided on one side of the bracket, and an output end of the motor is rotatably connected to a rotating shaft.

[0010] Preferably, a positive electrode is inserted in the center of the mounting block, and semicircular blocks are fixedly provided at both ends of the mounting block, and the length of the semicircular block and the mounting block is the same as the diameter of the inner wall of the steel pipe.

[0011] Preferably, the cross section of the limit block is concave, and the positioning ring fits against the inner wall of the limit block.

[0012] Preferably, the lower end of the spring fits with the upper end of the block, and the upper end of the spring fits with the connecting frame.

[0013] Preferably, the fixing sleeve is in a cone shape, and the fixing sleeve is composed of a plurality of trapezoidal blocks.

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

[0015] 1. In the utility model, a rotatable positioning ring is provided. After the steel pipe is inserted into the positioning ring, the positioning ring is rotated. Since a plurality of slots are symmetrically provided on the positioning ring, the positioning ring cooperates with the positioning assembly so that the angles at which the steel pipe is rotated by the positioning ring are the same, so that the positive electrode in the steel pipe can be detected in an orderly manner, thereby improving the detection accuracy;

[0016] 2. In the utility model, the rotation of the motor drives the rotating shaft to rotate, the rotating shaft drives the limit block to rotate, the limit block drives the positioning ring to rotate, the positioning ring drives the steel pipe to rotate, so that the steel pipe is tilted, and the installation block in the steel pipe moves along the steel pipe with the positive electrode, thereby improving the detection speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 3 This is a schematic diagram of the connection structure of the positioning ring and the limit block of the utility model;

[0021] Figure 4 It is a schematic diagram of the explosion structure of the utility model.

[0022] Serial numbers in the figure: 1. bracket; 11. mounting block; 12. rotating shaft; 13. limit block; 14. positioning ring; 15. fixing sleeve; 16. steel pipe; 2. fixing frame; 21. connecting frame; 22. clamping block; 23. pull rod; 24. spring; 25. clamping slot; 3. motor; 4. semicircular block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Embodiment: This embodiment provides a seamless steel pipe leakage detection device, see Figure 1-4 Specifically, it includes a bracket 1, two rotating shafts 12 are rotatably provided on the inner side of the upper end of the bracket 1, and a limit block 13 is fixedly provided in the middle of the two rotating shafts 12. A cylindrical positioning ring 14 is rotatably provided on the inner side of the limit block 13, and a steel pipe 16 is inserted in the positioning ring 14. Both ends of the positioning ring 14 are fixed with a fixing sleeve 15 for fixing the steel pipe 16. A mounting block 11 for fixing the positive electrode is provided in the steel pipe 16. The fixing sleeve 15 is conical in shape, and the fixing sleeve 15 is composed of a plurality of trapezoidal blocks. The cross section of the limit block 13 is concave in shape, and the positioning ring 14 fits with the inner wall of the limit block 13. A motor 3 is fixedly provided on one side of the bracket 1, and the output end of the motor 3 is rotatably connected to the rotating shaft 12, and a positioning component is provided on the upper end of the limit block 13;

[0025] Insert the steel pipe 16 into the positioning ring 14. The fixing sleeve 15 is composed of a plurality of trapezoidal spring pieces, and the inner wall is provided with a rubber pad. The fixing sleeve 15 fits with the outer wall of the steel pipe 16, and the position of the steel pipe 16 is fixed by friction. Then insert the positive electrode into the center of the mounting block 11, put the mounting block 11 into the steel pipe 16, let the positive electrode fit with the inner wall of the steel pipe 16, and then fit the negative electrode with the outer wall of the steel pipe 16, block both ends of the steel pipe 16, let the mounting block 11 and the positive electrode be located in the steel pipe 16, and the rotation of the motor 3 will drive the rotating shaft 12 to rotate. The rotating shaft 12 drives the limit block 13 to rotate, the limit block 13 drives the positioning ring 14 to rotate, the positioning ring 14 drives the steel pipe 16 to rotate, so that the steel pipe 16 is tilted, and the mounting block 11 inside the steel pipe 16 moves the positive electrode along the steel pipe 16 for detection. When the positive electrode moves from one side of the steel pipe 16 to the other side, the steel pipe 16 is rotated by rotating the positioning ring 14. The positioning ring 14 is limited by the positioning assembly, and each rotation is the same, so that the positive electrode inside the steel pipe 16 fits in the undetected position, and the cycle is repeated in sequence to improve the detection efficiency and accuracy.

[0026] In the specific implementation process, Figure 3 and Figure 4As shown, the positioning assembly includes a fixing frame 2 installed on the upper end of the limit block 13, a connecting frame 21 is fixedly provided on the upper surface of the fixing frame 2, a pull rod 23 is slidably provided on the connecting frame 21, a clamping block 22 is fixedly provided at the lower end of the pull rod 23, the lower end of the clamping block 22 passes through the fixing frame 2, a spring 24 is sleeved on the pull rod 23, a plurality of clamping grooves 25 are symmetrically provided on the outer wall of the positioning ring 14, the lower end of the spring 24 is in contact with the upper end of the clamping block 22, and the upper end of the spring 24 is in contact with the connecting frame 21;

[0027] Pull the pull rod 23, which drives the block 22 to rise, allowing the end of the block 22 to leave the slot 25 on the positioning ring 14, and rotate the positioning ring 14. Through the thrust of the spring 24, the lower end of the block 22 is stuck in the adjacent slot 25. By setting symmetrical slots 25, the rotation angle of the positioning ring 14 is determined, which facilitates the positive electrode to detect the inner wall of the steel pipe 16.

[0028] In the specific implementation process, Figure 1 and Figure 2 As shown, a positive electrode is inserted in the center of the mounting block 11, and semicircular blocks 4 are fixed at both ends of the mounting block 11. The length of the semicircular block 4 and the mounting block 11 is the same as the inner wall diameter of the steel pipe 16; the semicircular block 4 fits on both sides of the inner wall of the steel pipe 16, so that the mounting block 11 is always in the center of the steel pipe 16, and the sum of the lengths of the mounting block 11 and the semicircular block 4 is the same as the inner wall diameter of the steel pipe 16. When the steel pipe 16 rotates, the mounting block 11 drives the positive electrode to not rotate with it.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A seamless steel pipe leak detection device, comprising a bracket (1), characterized in that: Two rotating shafts (12) are rotatably provided on the inner side of the upper end of the bracket (1), and a limit block (13) is fixedly provided in the middle of the two rotating shafts (12). A cylindrical positioning ring (14) is rotatably provided on the inner side of the limit block (13), and a steel pipe (16) is inserted into the positioning ring (14). Fixing sleeves (15) for fixing the steel pipe (16) are fixedly provided at both ends of the positioning ring (14), and a mounting block (11) for fixing the positive electrode is provided in the steel pipe (16), and a positioning assembly is provided at the upper end of the limit block (13).

2. A seamless steel pipe leakage detection device according to claim 1, characterized in that: The positioning assembly comprises a fixing frame (2) mounted on the upper end of a limiting block (13); a connecting frame (21) is fixedly provided on the upper surface of the fixing frame (2); a pull rod (23) is slidably provided on the connecting frame (21); a clamping block (22) is fixedly provided on the lower end of the pull rod (23); the lower end of the clamping block (22) passes through the fixing frame (2); a spring (24) is sleeved on the pull rod (23); and a plurality of clamping grooves (25) are symmetrically provided on the outer wall of the positioning ring (14).

3. A seamless steel pipe leakage detection device according to claim 1, characterized in that: A motor (3) is fixedly provided on one side of the bracket (1), and an output end of the motor (3) is rotationally connected to a rotating shaft (12).

4. A seamless steel pipe leakage detection device according to claim 1, characterized in that: A positive electrode is inserted into the center of the mounting block (11), and semicircular blocks (4) are fixedly provided at both ends of the mounting block (11). The lengths of the semicircular blocks (4) and the mounting block (11) are the same as the diameter of the inner wall of the steel pipe (16).

5. A seamless steel pipe leakage detection device according to claim 1, characterized in that: The cross section of the limit block (13) is concave, and the positioning ring (14) fits the inner wall of the limit block (13).

6. A seamless steel pipe leakage detection device according to claim 2, characterized in that: The lower end of the spring (24) is in close contact with the upper end of the clamping block (22), and the upper end of the spring (24) is in close contact with the connecting frame (21).

7. A seamless steel pipe leakage detection device according to claim 2, characterized in that: The fixing sleeve (15) is in a cone shape and is composed of a plurality of trapezoidal blocks.

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