An adjustable fixing device for coil eddy current detection

Abstract

This utility model relates to the field of eddy current testing technology and discloses an adjustable fixing device for coil eddy current testing, including a mounting base. The top of the mounting base is provided with a coil fixing mechanism and a synchronous drive mechanism. The top of the mounting base also provides two pipe height adjustment mechanisms and two pipe support brackets. The coil fixing mechanism includes a fixing seat fixed to the top of the mounting base. A top cover is hinged to one side of the fixing seat surface. An installation groove is formed at the bottom of the inner wall of the fixing seat. A C-shaped plate is fixed to one side of the fixing seat surface. An extension block is fixed to the surface of the top cover. A pin is provided on one side of the C-shaped plate. Both the C-shaped plate and the extension block have pin grooves through which the pin passes. This adjustable fixing device for coil eddy current testing solves the problem of asynchronous adjustment in traditional devices through the synchronous drive mechanism and simplifies the coil installation process through the pin locking structure, thus improving overall testing efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of eddy current detection technology, specifically an adjustable fixing device for coil eddy current detection. Background Technology

[0002] Eddy current testing is a detection method based on the principle of electromagnetic induction, primarily used for detecting surface and near-surface defects in conductive materials. In eddy current testing, an alternating current is passed through the detection coil, thereby generating eddy currents in the conductor. When there are defects in the conductor or the conductor's properties change, the intensity and distribution of the eddy currents change, leading to a change in the impedance of the detection coil. By measuring this change in impedance, the presence or alteration of defects in the conductor can be determined.

[0003] Utility model patent CN221860334U discloses an adjustable fixing device for coil eddy current detection, including a fixing base. A detection coil is slidably connected to the inner wall of the fixing base. Two second rotating shafts are symmetrically fixed to the inner wall of the fixing base. Limiting plates are rotatably connected to the outer walls of the two second rotating shafts. Movable grooves are formed on the outer walls of the two limiting plates. A second bidirectional threaded rod is rotatably connected to the inner wall of the fixing base, with both ends of the second bidirectional threaded rod passing through the movable grooves. By rotating the second bidirectional threaded rod, the two ends of two push rods can slide synchronously in opposite directions along the inner walls of the limiting holes. The two push rods can push the limiting plates to rotate along the second rotating shafts, causing the lower ends of the two limiting plates to tilt. The two limiting plates support the outer wall of the detection coil. This design can be adjusted according to the size of the detection coil, thus enabling the device to fix detection coils of different sizes.

[0004] However, the above-mentioned existing technical solutions still have the following shortcomings: When adjusting the position of multiple first rotating shafts, the device needs to rotate two first bidirectional threaded rods simultaneously to ensure that the pipe is placed in a horizontal state when multiple first rotating shafts are in place. This makes the equipment difficult to operate, and it is difficult for the operator to rotate the two first bidirectional threaded rods synchronously and accurately. As a result, the pipe is prone to tilting back and forth after being placed in, making it difficult to align with the detection coil. In addition, when installing the detection coil, the device needs to rotate the adjustment handwheels on both sides before the top cover and the fixed seat can be removed. This makes the device time-consuming and labor-intensive to use, and its efficiency is poor. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an adjustable fixing device for coil eddy current detection, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an adjustable fixing device for coil eddy current detection, including a mounting base, a coil fixing mechanism and a synchronous drive mechanism are provided on the top of the mounting base, and two pipe height adjustment mechanisms and two pipe supports are provided on the top of the mounting base;

[0007] The coil fixing mechanism includes a fixing base, which is fixed to the top of the mounting base. A top cover is hinged to one side of the fixing base surface. An installation groove is provided at the bottom of the inner wall of the fixing base. A C-shaped plate is fixed to one side of the fixing base surface. An extension block is fixed to the surface of the top cover. A pin is provided on one side of the C-shaped plate. Both the C-shaped plate and the extension block have pin grooves through which the pin passes. A fixing structure is provided inside the mounting groove.

[0008] Preferably, the internal fixing structure of the mounting groove includes a first bidirectional lead screw, one end of which is rotatably connected to the inner wall of the fixing seat, and the other end of which passes through the fixing seat and is fixed with a first handwheel. Two sliding sleeves are threadedly connected to the surface of the first bidirectional lead screw, and the sliding sleeves are slidably connected to the surface of the mounting groove. A clamping plate is fixed to the top of the sliding sleeve.

[0009] Preferably, the top of the top cover is threaded with a shank bolt, and a clamping block is fixed to the bottom of the shank bolt.

[0010] Preferably, the pipe height adjustment mechanism includes a square profile plate, which is fixed to the top of the mounting base. A second bidirectional screw is rotatably connected to the inner wall of the square profile plate. One end of the second bidirectional screw passes through the square profile plate. Two sliding plates are threadedly connected to the surface of the second bidirectional screw. A driving plate is hinged to the top of the sliding plate. A lifting plate is hinged to the top of both driving plates. The top of the lifting plate is fixedly connected to the bottom of the pipe support.

[0011] Preferably, a first guide rod is fixed to the inner wall of the square-shaped plate, and the sliding plate is slidably connected to the surface of the first guide rod.

[0012] Preferably, a fixing sleeve is fixed to the surface of the square profile plate, and a second guide rod is fixed to the bottom of the lifting plate, the second guide rod sliding through the fixing sleeve.

[0013] Preferably, the synchronous drive mechanism includes a lifting plate, which is fixed to the top of the mounting base. Two bearings with seats are fixed to the top of the lifting plate. A linkage shaft is fixed to the inner wall of the bearings with seats. A second handwheel is fixed to one end of the linkage shaft. Two first bevel gears are fixed to the surface of the linkage shaft. A second bevel gear meshes with the surface of the first bevel gears. The second bevel gear is fixedly connected to one end of the second bidirectional lead screw that passes through the square profile plate.

[0014] Preferably, a rotating roller is rotatably connected to the surface of the pipe support.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0016] This invention achieves fully synchronized movement of the height adjustment mechanisms on both sides of the pipe fittings through a synchronous drive mechanism design, solving the pipe fitting tilting problem caused by inconsistent manual adjustments in traditional devices. The dual guiding system of the first and second guide rods ensures stability during the lifting process, and combined with the scissor-type lifting structure, allows the device to adapt to the testing requirements of different pipe diameters. The coil fixing mechanism adopts a bidirectional screw-driven clamping plate synchronous clamping design, with the auxiliary fixing of the top clamping block, providing reliable clamping force for the detection coil and avoiding displacement or vibration during the testing process. The hinged design of the top cover and the quick-locking structure of the pin greatly simplify the coil installation and disassembly process, significantly improving operational efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0019] Figure 3 This is a cross-sectional structural diagram of the coil fixing mechanism in this utility model;

[0020] Figure 4 This is a schematic diagram of the height adjustment mechanism for the pipe fittings in this utility model;

[0021] Figure 5 This is a schematic diagram of the synchronous drive mechanism in this utility model.

[0022] The components include: 1. Mounting base; 2. Coil fixing mechanism; 201. Fixing base; 202. Top cover; 203. Mounting groove; 204. C-shaped plate; 205. Extension block; 206. Pin rod; 207. First bidirectional lead screw; 208. Sliding sleeve; 209. Clamping plate; 210. First handwheel; 211. Handled bolt; 212. Clamping block; 3. Pipe height adjustment mechanism; 301. Square profile plate; 302. Second bidirectional lead screw; 303. Sliding plate; 304. Drive plate; 305. Lifting plate; 306. First guide rod; 307. Fixing sleeve; 308. Second guide rod; 4. Synchronous drive mechanism; 401. Lifting plate; 402. Bearing with seat; 403. Linkage shaft; 404. Second handwheel; 405. First bevel gear; 406. Second bevel gear; 5. Pipe support; 6. Rotary roller. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0024] Please see Figure 1-5 An adjustable fixing device for coil eddy current detection includes a mounting base 1, a coil fixing mechanism 2 and a synchronous drive mechanism 4 on the top of the mounting base 1, and two pipe height adjustment mechanisms 3 and two pipe brackets 5 on the top of the mounting base 1.

[0025] The coil fixing mechanism 2 includes a fixing seat 201, which is fixed to the top of the mounting seat 1. A top cover 202 is hinged to one side of the surface of the fixing seat 201. An installation groove 203 is provided at the bottom of the inner wall of the fixing seat 201. A C-shaped plate 204 is fixed to one side of the surface of the fixing seat 201. An extension block 205 is fixed to the surface of the top cover 202. A pin 206 is provided on one side of the C-shaped plate 204. Both the C-shaped plate 204 and the extension block 205 have pin grooves through which the pin 206 passes. A fixing structure is provided inside the installation groove 203.

[0026] Through the above technical solution, the hinged design of the fixed base 201 and the top cover 202 makes the installation of the detection coil more convenient. After the top cover 202 is opened, the detection coil can be directly placed into the fixed base 201. The cooperation of the pin 206 with the C-shaped plate 204 and the extension block 205 realizes the quick locking of the top cover 202. After closing, inserting the pin 206 into the pin hole ensures that the top cover 202 will not move or open during the detection process, avoiding the cumbersome operation of rotating multiple handwheels in the traditional structure. The fixing structure in the mounting slot 203 can be adjusted according to the coil size to ensure the stability of the coil during the detection process. This design simplifies the operation process and improves the detection efficiency, and is especially suitable for industrial scenarios where detection coils are frequently replaced.

[0027] The internal fixing structure of the mounting slot 203 includes a first bidirectional lead screw 207. One end of the first bidirectional lead screw 207 is rotatably connected to the inner wall of the fixing seat 201. One end of the first bidirectional lead screw 207 passes through the fixing seat 201 and is fixed with a first handwheel 210. Two sliding sleeves 208 are threadedly connected to the surface of the first bidirectional lead screw 207. The sliding sleeves 208 are slidably connected to the surface of the mounting slot 203. A clamping plate 209 is fixed to the top of the sliding sleeves 208.

[0028] Through the above technical solution, by rotating the first handwheel 210 to drive the first bidirectional lead screw 207 to rotate, the two sliding sleeves 208 slide synchronously in opposite directions along the mounting groove 203, thereby driving the clamping plate 209 to clamp and fix the detection coil. This design realizes adaptive clamping of coils of different sizes. The synchronous movement of the clamping plate 209 ensures the centering of the coil during the fixing process, improving the detection accuracy and equipment reliability.

[0029] The top of the top cover 202 has a threaded bolt 211 with a handle, and a clamping block 212 is fixed to the bottom of the bolt 211.

[0030] Through the above technical solution, the clamping block 212 can be moved up and down by rotating the bolt with handle 211, thereby applying pressure to the top of the detection coil and further enhancing the fixing effect. This structure makes up for the problem of coil shaking that may be caused by relying solely on lateral clamping.

[0031] The pipe height adjustment mechanism 3 includes a square profile plate 301, which is fixed to the top of the mounting base 1. A second bidirectional screw 302 is rotatably connected to the inner wall of the square profile plate 301. One end of the second bidirectional screw 302 passes through the square profile plate 301. Two sliding plates 303 are threadedly connected to the surface of the second bidirectional screw 302. A drive plate 304 is hinged to the top of the sliding plate 303. A lifting plate 305 is hinged to the top of both drive plates 304. The top of the lifting plate 305 is fixedly connected to the bottom of the pipe support 5.

[0032] Through the above technical solution, the rotation of the second bidirectional lead screw 302 drives the two sliding plates 303 to move synchronously in opposite directions, thereby driving the lifting plate 305 to move up and down through the drive plate 304, realizing the height adjustment of the pipe support 5. This structure adopts the scissor lifting principle, which has the characteristics of strong load-bearing capacity and high adjustment accuracy, and can adapt to the detection requirements of different pipe diameters. At the same time, the symmetrical drive ensures the stability of the lifting process and avoids detection errors caused by pipe tilting.

[0033] A first guide rod 306 is fixed to the inner wall of the square profile plate 301, and the sliding plate 303 is slidably connected to the surface of the first guide rod 306.

[0034] Through the above technical solution, the first guide rod 306 provides guidance for the sliding plate 303, preventing it from deflecting during movement and ensuring that the rotational motion of the second bidirectional lead screw 302 can be accurately converted into the linear motion of the sliding plate 303.

[0035] A fixing sleeve 307 is fixed to the surface of the square profile plate 301, and a second guide rod 308 is fixed to the bottom of the lifting plate 305. The second guide rod 308 slides through the fixing sleeve 307.

[0036] Through the above technical solution, the cooperation between the second guide rod 308 and the fixed sleeve 307 provides vertical guidance for the lifting plate 305, preventing it from shifting horizontally during the lifting process, further enhancing the stability of height adjustment, and ensuring that the pipe support 5 always remains horizontal.

[0037] The synchronous drive mechanism 4 includes a lifting plate 401, which is fixed to the top of the mounting base 1. Two bearings 402 with seats are fixed to the top of the lifting plate 401. A linkage shaft 403 is fixed to the inner wall of the bearings 402 with seats. A second handwheel 404 is fixed to one end of the linkage shaft 403. Two first bevel gears 405 are fixed to the surface of the linkage shaft 403. A second bevel gear 406 meshes with the surface of the first bevel gears 405. The second bevel gear 406 is fixedly connected to one end of the second bidirectional lead screw 302 that passes through the square profile plate 301.

[0038] By using the above technical solution, rotating the second handwheel 404 drives the linkage shaft 403 to rotate, causing the two first bevel gears 405 to synchronously drive the second bevel gear 406 to rotate, thereby driving the two second bidirectional lead screws 302 to rotate synchronously, realizing the synchronous lifting and lowering of the height adjustment mechanism 3 on both sides of the pipe fittings, and completely solving the problem of inconsistent height caused by the need for separate adjustment in traditional devices.

[0039] The surface of the pipe support 5 is rotatably connected to a rotating roller 6.

[0040] Through the above technical solution, the design of the rotating roller 6 enables the pipe to slide smoothly when pushed into the detection coil, reducing frictional resistance and avoiding scratches on the surface of the pipe.

[0041] A first locking block is fixed to the surface of the lifting plate 401, and a first locking pin slides through the surface of the first locking block. Two first locking grooves that cooperate with the first locking pin are opened on the surface of the linkage shaft 403. A second locking block is fixed to the surface of the fixed seat 201, and a second locking pin slides through the surface of the second locking block. Two second locking grooves that cooperate with the second locking pin are opened on the surface of the first bidirectional lead screw 207.

[0042] With the above technical solution, after the linkage shaft 403 rotates to the required angle, the first locking pin passes through the first locking groove and the first locking block to fix the rotation angle of the linkage shaft 403. After the first bidirectional lead screw 207 rotates to the required angle, the rotation angle of the first bidirectional lead screw 207 can also be fixed by passing the second locking pin through the second locking groove and the second locking block, so as to prevent vibration and other factors from causing the linkage shaft 403 and the first bidirectional lead screw 207 to rotate on their own.

[0043] Working principle: First, the detection coil is placed in the fixed seat 201. Rotating the first handwheel 210 drives the first bidirectional lead screw 207 to rotate, causing the sliding sleeve 208 to drive the clamping plate 209 to clamp the coil synchronously. After closing the top cover 202, the pin 206 is inserted to lock it, and the handle bolt 211 is rotated to press the clamping block 212 against the top of the coil. Subsequently, the second handwheel 404 of the synchronous drive mechanism 4 drives the linkage shaft 403 to rotate. Through the transmission of the first bevel gear 405 and the second bevel gear 406, the second bidirectional lead screws 302 on both sides rotate synchronously, driving the sliding plate 303 to drive the drive plate 304 to push the lifting plate 305 up and down, realizing the height adjustment of the pipe support 5. The pipe is placed on the rotating roller 6 and the detection coil is pushed in to start the detection work. This device solves the problem of asynchronous adjustment in traditional devices through the synchronous drive mechanism 4, and simplifies the coil installation process through the locking structure of the pin 206, thus improving the overall detection efficiency and accuracy.

[0044] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coil eddy current inspection adjustable fixture, characterized by: It includes a mounting base (1), the top of which is provided with a coil fixing mechanism (2) and a synchronous drive mechanism (4), and the top of the mounting base (1) is provided with two pipe height adjustment mechanisms (3) and two pipe brackets (5); The coil fixing mechanism (2) includes a fixing seat (201), which is fixed to the top of the mounting seat (1). A top cover (202) is hinged to one side of the surface of the fixing seat (201). An installation groove (203) is provided at the bottom of the inner wall of the fixing seat (201). A C-shaped plate (204) is fixed to one side of the surface of the fixing seat (201). An extension block (205) is fixed to the surface of the top cover (202). A pin (206) is provided on one side of the C-shaped plate (204). Both the C-shaped plate (204) and the extension block (205) have pin grooves through which the pin (206) passes. A fixing structure is provided inside the mounting groove (203).

2. A coil eddy current inspection adjustable fixture as claimed in claim 1, wherein: The internal fixing structure of the mounting groove (203) includes a first bidirectional lead screw (207). One end of the first bidirectional lead screw (207) is rotatably connected to the inner wall of the fixing seat (201). One end of the first bidirectional lead screw (207) passes through the fixing seat (201) and is fixed with a first handwheel (210). Two sliding sleeves (208) are threadedly connected to the surface of the first bidirectional lead screw (207). The sliding sleeves (208) are slidably connected to the surface of the mounting groove (203). A clamping plate (209) is fixed to the top of the sliding sleeves (208).

3. An adjustable fixture for coil eddy current testing as defined in claim 1, wherein: The top of the top cover (202) is threaded through with a shank bolt (211), and a clamping block (212) is fixed to the bottom of the shank bolt (211).

4. An adjustable fixture for coil eddy current testing as defined in claim 1, wherein: The pipe height adjustment mechanism (3) includes a square profile plate (301), which is fixed to the top of the mounting base (1). A second bidirectional screw (302) is rotatably connected to the inner wall of the square profile plate (301). One end of the second bidirectional screw (302) passes through the square profile plate (301). Two sliding plates (303) are threadedly connected to the surface of the second bidirectional screw (302). A driving plate (304) is hinged to the top of the sliding plate (303). A lifting plate (305) is hinged to the top of the driving plates (304) on both sides. The top of the lifting plate (305) is fixedly connected to the bottom of the pipe support (5).

5. A coil eddy current inspection adjustable fixture as claimed in claim 4, wherein: The inner wall of the square profile plate (301) is fixed with a first guide rod (306), and the sliding plate (303) is slidably connected to the surface of the first guide rod (306).

6. An adjustable fixture for coil eddy current testing as defined in claim 4, wherein: A fixing sleeve (307) is fixed to the surface of the square profile plate (301), and a second guide rod (308) is fixed to the bottom of the lifting plate (305). The second guide rod (308) slides through the fixing sleeve (307).

7. An adjustable fixture for coil eddy current testing as defined in claim 4, wherein: The synchronous drive mechanism (4) includes a lifting plate (401), which is fixed to the top of the mounting base (1). Two bearings (402) are fixed to the top of the lifting plate (401). A linkage shaft (403) is fixed to the inner wall of the bearings (402). A second handwheel (404) is fixed to one end of the linkage shaft (403). Two first bevel gears (405) are fixed to the surface of the linkage shaft (403). A second bevel gear (406) meshes with the surface of the first bevel gears (405). The second bevel gear (406) is fixedly connected to one end of the second bidirectional lead screw (302) that passes through the square profile plate (301).

8. An adjustable fixture for coil eddy current testing as defined in claim 1, wherein: The pipe support (5) is rotatably connected to a roller (6).

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