Flexibly-adjustable eddy current detection array probe in pipeline

Abstract

The invention discloses a pipeline internal eddy current detection array probe capable of being flexibly adjusted, and relates to the field of array probes, the pipeline internal eddy current detection array probe comprises multiple groups of sliding blocks, a first sliding reducing rod, a rocker and a second sliding reducing rod are arranged in each sliding block, one end of the first sliding reducing rod is inserted into one end of the second sliding reducing rod, and the other end of the first sliding reducing rod is inserted into the rocker. And when the first sliding variable-diameter rod and the second sliding variable-diameter rod are close to each other, the sliding block is pushed to move towards the outer side. Through the eddy current detection unit and the circuit board, an electromagnetic eddy current generator can be powered on during detection, and magnetic force generated by the electromagnetic eddy current generator is opposite to that generated by an adsorption magnet, so that the eddy current detection unit is pushed to move towards the outer side until the eddy current detection unit is further aligned and attached to the inner wall of the pipeline; at the moment, the detection probe is attached to the interior of the pipeline, the pipeline is excited and magnetized through the magnetizing piece, then the interior of the pipeline is detected through the detection probe, and the detection effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of array probes, in particular to a flexibly adjustable array probe for detecting eddy currents in pipelines. Background Art

[0002] During long-term use, pipelines may develop defects such as corrosion, cracks, and perforations. If these defects are not discovered and handled in a timely manner, they may lead to serious accidents such as leakage and explosion, causing huge economic losses and environmental pollution, and even threatening people's lives. For this purpose, ultrasonic detection devices are used. The array probe in ultrasonic detection is a probe system composed of multiple small sensor elements. Each sensor element (also called array element) can independently transmit and receive ultrasonic signals. Through the collaborative work of these elements, the array probe can provide higher resolution and more flexible detection methods than traditional single-element probes.

[0003] However, existing technologies, such as Chinese patent number CN103487502B, disclose an eddy current array probe for detecting surface defects of complex conductive structures. The probes are composed of multiple eddy current probes arranged in a grid shape in the horizontal and vertical directions; a mechanical elastic structure is provided between two adjacent eddy current probes; an excitation coil and a sensor are installed at the bottom end of each eddy current probe facing the surface of the object to be inspected, and a shielding layer is provided around the excitation coil and the sensor in the non-transmitting or receiving direction.

[0004] Although the existing technology can detect different directions in different pipes, the position of the probe is fixed during the detection process. When detecting pipes of different diameters, different fixed structures need to be used, which is inconvenient to use. Secondly, during the detection process, the existing excitation coil cannot fit tightly inside the pipe, resulting in poor coil magnetization effect. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a flexibly adjustable in-pipe eddy current detection array probe to solve the technical problem.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a flexibly adjustable eddy current detection array probe in a pipeline, comprising multiple groups of sliding blocks, and a first sliding diameter-changing rod, a rocker and a second sliding diameter-changing rod are arranged inside the sliding block, one end of the first sliding diameter-changing rod is inserted into one end of the second sliding diameter-changing rod, and the first sliding diameter-changing rod and the second sliding diameter-changing rod are close to each other, pushing the sliding block to move outward, multiple groups of eddy current detection units are installed on the outer wall of the sliding block, and a circuit board matching the eddy current detection unit is installed inside the sliding block, two groups of snap plates and six groups of sleeves are connected to the top of the circuit board, and every three groups of sleeves are evenly distributed on a group of snap plates, and each group of eddy current detection units are located inside the sleeve, an adsorption magnet is installed at the inner bottom end of the sleeve, an electromagnetic eddy current generator is installed inside the eddy current detection unit, the electromagnetic eddy current generator is electrically connected to the snap plate, and the magnetic force generated by the electromagnetic eddy current generator is opposite to the adsorption magnet.

[0007] By adopting the above technical solution, the position of the sliding block can be easily adjusted to adapt to pipes of different diameters. After the adjustment, the eddy current detection unit is finely adjusted through the electromagnetic eddy current generator, thereby further improving the detection effect. During the detection process, the pipeline is excited and magnetized by the electromagnetic eddy current generator, which facilitates detection by the detection probe.

[0008] The present invention is further configured such that a locking groove is provided at the bottom end of the sliding block, the outer wall of the first sliding diameter-changing rod is connected to the first push block, the outer wall of the second sliding diameter-changing rod is connected to the second push block, and the locking groove is locked and connected with the first push block and the bidirectional screw rod.

[0009] As a preferred embodiment, the sliding block can be conveniently limited by the engaging groove, thereby improving the movement stability of the sliding block.

[0010] The present invention is further configured such that a bidirectional screw rod is connected to one side of the rocker, and the bidirectional screw rod passes through the first sliding diameter-changing rod and the second sliding diameter-changing rod, and the rocker drives the first sliding diameter-changing rod and the second sliding diameter-changing rod to move closer to or away from each other through the bidirectional screw rod.

[0011] As an advantage, it is convenient.

[0012] The present invention is further configured such that one end of the first sliding diameter-changing rod is connected to an insertion rod, and one end of the second sliding diameter-changing rod is provided with a slot, and the insertion rod is inserted into the slot to limit the first sliding diameter-changing rod and the second sliding diameter-changing rod from each other.

[0013] Preferably, the first sliding diameter-changing rod and the second sliding diameter-changing rod can be conveniently inserted into each other to adjust the distance.

[0014] The present invention is further configured such that a wire extends below the eddy current detection unit, and the eddy current detection unit is electrically connected to the circuit board via the wire.

[0015] Preferably, it is convenient to connect the eddy current detection unit to electricity.

[0016] The present invention is further configured such that the bottom end of the eddy current detection unit is connected to a support plate, the support plate is made of metal, the top end of the eddy current detection unit is connected to a detection probe, the outer side of the detection probe is connected to a pad, and the detection probe is fixedly connected to the eddy current detection unit through the pad.

[0017] Preferably, the eddy current detection unit can be supported by a supporting plate, and interact with the adsorption magnet, so that the eddy current detection unit is limited and fixed when the eddy current detection unit is powered off.

[0018] The present invention is further configured such that the bottom end of the electromagnetic eddy current generator is connected to a lower card plate, the interior of the eddy current detection unit is provided with a support plate and the electromagnetic eddy current generator, the top of the electromagnetic generator is connected to a magnetized sheet, the top of the electromagnetic eddy current generator is connected to an upper card plate, and multiple groups of legs of the magnetized sheet extend to the top of the eddy current detection unit and are evenly distributed around the detection probe.

[0019] As a preferred embodiment, it is convenient to excite and magnetize the inner wall of the pipeline, thereby improving the detection effect.

[0020] In summary, the present invention mainly has the following beneficial effects:

[0021] 1. The present invention provides a first sliding diameter-changing rod, a second sliding diameter-changing rod and a sliding block. When performing detection, the rocker drives the bidirectional screw to rotate, thereby driving the first sliding diameter-changing rod and the second sliding diameter-changing rod to approach each other, thereby pushing the sliding block to move outward until it fits with the inner wall of the pipe, so that the eddy current detection unit can fit tightly against the inner wall of the pipe, making it convenient to detect different pipes.

[0022] 2. The present invention also provides an eddy current detection unit and a circuit board, so that when performing detection, the electromagnetic eddy current generator can be powered on. At this time, the magnetic force generated by the electromagnetic eddy current generator is opposite to the adsorption magnet, thereby pushing the eddy current detection unit to move outward until the eddy current detection unit is further aligned and fits with the inner wall of the pipe. At this time, the detection probe fits with the inside of the pipe, and the pipe is excited and magnetized by the magnetization sheet. Then, the inside of the pipe is detected by the detection probe, thereby improving the detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2Schematic diagram of the connection structure between the first sliding diameter-changing rod and the second sliding diameter-changing rod of the present invention;

[0025] Figure 3 This is a schematic structural diagram of the connection between the sliding block and the sliding diameter-changing rod of the present invention;

[0026] Figure 4 This is a schematic structural diagram of the first sliding diameter-changing rod of the present invention;

[0027] Figure 5 Schematic diagram of the structure of the second sliding diameter-changing rod of the present invention;

[0028] Figure 6 Schematic diagram of the cross-sectional structure of the sliding block of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the eddy current detection unit and the circuit board installed in the present invention;

[0030] Figure 8 Schematic diagram of the internal structure of the eddy current detection unit of the present invention;

[0031] Figure 9 This is a schematic diagram of the explosion structure of the electromagnetic eddy current generator of the present invention;

[0032] Figure 10 It is a structural schematic diagram of the magnetized sheet of the present invention.

[0033] Description of reference numerals:

[0034] 1. Sliding block; 101. Engaging slot; 2. First sliding reducing rod; 201. First pushing block; 202. Inserting rod; 3. Rocker; 301. Bidirectional screw; 4. Second sliding reducing rod; 401. Second pushing block; 402. Slot; 5. Eddy current detection unit; 501. Wire; 502. Support plate; 503. Electromagnetic eddy current generator; 5031. Lower clamping plate; 5032. Electromagnet; 5033. Hollow pipe; 5034. Magnetizing sheet; 5035. Upper clamping plate; 504. Pad; 505. Detection probe; 6. Circuit board; 601. Engaging plate; 602. Sleeve; 603. Adsorption magnet. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0036] The following describes an embodiment of the present invention based on its overall structure.

[0037] Example:

[0038] See also Figures 1 to 6 , including multiple groups of sliding blocks 1, and the interior of the sliding block 1 is provided with a first sliding reducing rod 2, a rocker 3 and a second sliding reducing rod 4, one end of the first sliding reducing rod 2 is inserted into one end of the second sliding reducing rod 4, and a locking groove 101 is opened at the bottom end of the sliding block 1, the outer wall of the first sliding reducing rod 2 is connected to the first push block 201, and the outer wall of the second sliding reducing rod 4 is connected to the second push block 401, the locking groove 101 is engaged with the first push block 201 and the bidirectional screw rod 301, and when the first sliding reducing rod 2 and the second sliding reducing rod 4 are close to each other, the sliding block 1 is pushed to move outward, so that the position of the sliding block 1 can be conveniently adjusted, so that the sliding block 1 fits the inside of pipes of different diameters.

[0039] See also Figures 7 to 10 , multiple groups of eddy current detection units 5 are installed on the outer wall of the sliding block 1, and a circuit board 6 matching the eddy current detection unit 5 is installed inside the sliding block 1. The top of the circuit board 6 is connected with two groups of clamping plates 601 and six groups of sleeves 602. Every three groups of sleeves 602 are evenly distributed on a group of clamping plates 601. Each group of eddy current detection units 5 is located inside the sleeve 602. An adsorption magnet 603 is installed at the bottom end of the sleeve 602. A support plate 502 and an electromagnetic eddy current generator 503 are installed inside the eddy current detection unit 5. A wire 501 extends from the bottom of the eddy current detection unit 5. The eddy current detection unit 5 is electrically connected to the circuit board 6 through the wire 501. The support plate 502 is made of metal. The top of the eddy current detection unit 5 is connected with The detection probe 505 is connected to a pad 504 on the outside of the detection probe 505. The detection probe 505 is fixedly connected to the eddy current detection unit 5 through the pad 504. The electromagnetic eddy current generator 503 is installed inside the eddy current detection unit 5. The bottom end of the electromagnetic eddy current generator 503 is connected to a lower clamping plate 5031. The top of the electromagnetic eddy current generator 5032 is connected to a magnetizing piece 5034. The top of the electromagnetic eddy current generator 503 is connected to an upper clamping plate 5035. Multiple groups of legs of the magnetizing piece 5034 extend to the top of the eddy current detection unit 5 and are evenly distributed around the detection probe 505. The eddy current electromagnetic eddy current generator 503 is electrically connected to the clamping plate 601. The magnetic force generated by the electromagnetic eddy current generator 503 is opposite to the adsorption magnet 603.

[0040] In the above embodiment, please refer to Figures 1 to 3A bidirectional screw rod 301 is connected to one side of the rocker 3, and the bidirectional screw rod 301 passes through the first sliding reducing rod 2 and the second sliding reducing rod 4. The rocker 3 drives the first sliding reducing rod 2 and the second sliding reducing rod 4 to move closer to or away from each other through the bidirectional screw rod 301. One end of the first sliding reducing rod 2 is connected to the insertion rod 202, and one end of the second sliding reducing rod 4 is provided with a slot 402. The insertion rod 202 is inserted into the slot 402 to limit the first sliding reducing rod 2 and the second sliding reducing rod 4 to each other. The positions of the first sliding reducing rod 2 and the second sliding reducing rod 4 can be easily adjusted through the rocker 3.

[0041] Before the equipment enters the pipeline for operation, it is necessary to measure the actual inner diameter of the target pipeline. By adopting the linkage reducing structure of the first sliding reducing rod 2 and the second sliding reducing rod 4, the radial size is adjusted using lever transmission, and a uniform and stable contact pressure is formed between the array detection probe and the inner wall of the pipeline to ensure the reliability of the detection signal transmission and the accuracy of data collection. By rotating the rocker 3 clockwise, the rotational motion is converted into linear motion, and the annular first sliding reducing rod 2 and the second sliding reducing rod 4 are synchronously driven to move toward the center along the built-in bidirectional screw 301, and the first push block 201 and the second push block 202 are moved toward the center. The two push blocks 401 slide synchronously toward the center along the engaging groove 101, pushing the sliding block 1 to expand. When the pipe diameter becomes smaller, the rocker 3 rotates counterclockwise, and the transmission system works in reverse, and can simultaneously drive the annular first sliding reducing rod 2 and the second sliding reducing rod 4 to move to both sides along the built-in bidirectional screw 301, so that the first push block 201 and the second push block 401 slide synchronously outward along the guide groove, causing the sliding block 1 to contract radially. When the target pipe diameter is adjusted, the rocker 3 can be disassembled and the screw clamping device can be used to lock the T-screw to prevent dimensional deviation due to vibration or external force interference during the detection process, thereby ensuring measurement accuracy.

[0042] During the detection process, the eddy current detection unit 5, with the sliding block 1 close to the inner wall of the pipe, is powered on to the eddy current detection units 5 of the same group. At this time, the electromagnetic eddy current generator 503 is powered on to generate magnetic force. At this time, the magnetic force generated by the electromagnetic eddy current generator 503 is opposite to the adsorption magnet 603 below. At this time, the magnetic force will push the eddy current detection unit 5 to move outward until the detection probe 505 is in contact with the inner wall of the pipe. At this time, the magnetization sheet 5034 will be in contact with the inside of the pipe. The magnetic force of the electromagnetic eddy current generator 503 will be transmitted to the inside of the pipe through the magnetization sheet 5034 to excite and magnetize the pipe. At this time, the magnetized position of the pipe is detected by the detection probe 505, thereby effectively improving the detection effect. After the detection is completed, the power supply to the electromagnetic eddy current generator 503 is cut off. At this time, the adsorption magnet 603 adsorbs the metal support plate 502, causing the eddy current detection unit 5 to return to the inside of the sleeve 602, and the eddy current detection unit 5 is retracted, thereby protecting the eddy current detection unit 5.

[0043] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A flexible adjustable eddy current detection array probe for pipelines, comprising a plurality of sliding blocks (1), wherein the sliding blocks (1) are provided with a first sliding diameter-changing rod (2), a rocker (3) and a second sliding diameter-changing rod (4), characterized in that: One end of the first sliding diameter-changing rod (2) is inserted into one end of the second sliding diameter-changing rod (4). When the first sliding diameter-changing rod (2) and the second sliding diameter-changing rod (4) are close to each other, the sliding block (1) is pushed to move outward. The outer wall of the sliding block (1) is installed with multiple groups of eddy current detection units (5), and the interior of the sliding block (1) is installed with a circuit board (6) matching the eddy current detection unit (5). The top of the circuit board (6) is connected to two groups of engaging plates (601) and six groups of sleeves (602). Each Three groups of sleeves (602) are evenly distributed on a group of engaging plates (601), and each group of eddy current detection units (5) is located inside the sleeve (602). An adsorption magnet (603) is installed at the bottom end of the inner part of the sleeve (602), and an electromagnetic eddy current generator (503) is installed inside the eddy current detection unit (5). The electromagnetic eddy current generator (503) is electrically connected to the engaging plate (601), and the magnetic force generated by the electromagnetic eddy current generator (503) is opposite to that of the adsorption magnet (603).

2. The flexibly adjustable in-pipe eddy current detection array probe according to claim 1, characterized in that: The bottom end of the sliding block (1) is provided with a snap-fitting groove (101), the outer wall of the first sliding diameter-changing rod (2) is connected to the first push block (201), and the outer wall of the second sliding diameter-changing rod (4) is connected to the second push block (401), and the snap-fitting groove (101) is snap-fitted with the first push block (201) and the bidirectional screw rod (301).

3. The flexibly adjustable in-pipe eddy current detection array probe according to claim 1, characterized in that: One side of the rocker (3) is connected to a bidirectional screw rod (301), and the bidirectional screw rod (301) passes through the first sliding diameter-changing rod (2) and the second sliding diameter-changing rod (4). The rocker (3) drives the first sliding diameter-changing rod (2) and the second sliding diameter-changing rod (4) to move closer to or farther away from each other through the bidirectional screw rod (301).

4. The flexibly adjustable in-pipe eddy current detection array probe according to claim 1, characterized in that: One end of the first sliding diameter-changing rod (2) is connected to an insertion rod (202), and one end of the second sliding diameter-changing rod (4) is provided with a slot (402). The insertion rod (202) is inserted into the slot (402) to limit the first sliding diameter-changing rod (2) and the second sliding diameter-changing rod (4) to each other.

5. The flexibly adjustable in-pipe eddy current detection array probe according to claim 1, characterized in that: A wire (501) extends below the eddy current detection unit (5), and the eddy current detection unit (5) is electrically connected to the circuit board (6) via the wire (501).

6. The flexibly adjustable in-pipe eddy current detection array probe according to claim 1, characterized in that: The bottom end of the eddy current detection unit (5) is connected to a supporting plate (502), the supporting plate (502) is made of metal, the top end of the eddy current detection unit (5) is connected to a detection probe (505), the outer side of the detection probe (505) is connected to a pad (504), and the detection probe (505) is fixedly connected to the eddy current detection unit (5) via the pad (504).

7. The flexibly adjustable in-pipe eddy current detection array probe according to claim 1, characterized in that: The bottom end of the electromagnetic eddy current generator (503) is connected to a lower clamping plate (5031), the interior of the eddy current detection unit (5) is provided with a support plate (502) and the electromagnetic eddy current generator (503), the top end of the electromagnetic generator (5032) is connected to a magnetizing plate (5034), the top end of the electromagnetic eddy current generator (503) is connected to an upper clamping plate (5035), and multiple groups of legs of the magnetizing plate (5034) extend to the top end of the eddy current detection unit (5) and are evenly distributed around the detection probe (505).

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