Clamp for eddy current testing of welded pipe

Abstract

The utility model provides a welding pipe eddy current testing fixture, which comprises a support table top, unit slideways, tightening structures, extension plates and a screw driving structure, the unit slideways are fixedly mounted at two ends of the support table top, the tightening structures are slidably mounted on the two groups of unit slideways, and the extension plates are fixedly mounted on the lower surfaces of two ends of the support table top; the screw rod driving structure is fixedly mounted between the two groups of extension plates; due to the arrangement of the clamping structure and the eddy current detection structure, the steel pipe can be stably clamped, the steel pipe can be comprehensively monitored, the automation degree is high, and large-degree work of workers is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of fixtures for eddy current detection of welded pipes, in particular to a fixture for eddy current detection of welded pipes. Background Art

[0002] Welded pipes are a type of pipe widely used in industry. They play a vital role in the fields of petroleum, chemical industry, electric power, etc. In these applications, the quality of welded pipes directly affects the safety and operating efficiency of the entire system. Therefore, strict quality inspection of welded pipes is essential.

[0003] To ensure the quality of welded pipes, traditional inspection methods such as visual inspection, ultrasonic testing, and radiographic testing have been gradually supplemented and replaced by eddy current testing. Eddy current testing is a non-contact electromagnetic inspection technology that detects internal defects by stimulating eddy currents in the material being tested. Eddy current testing offers advantages such as high sensitivity, high resolution, and rapid detection, making it particularly suitable for inspecting complex structures such as welded pipes.

[0004] Although existing eddy current testing equipment has the advantages of high sensitivity and non-contact detection, it still has some shortcomings in practical applications:

[0005] 1. Clamping and fixing issues: During the eddy current testing of welded pipes, stable clamping and positioning of the steel pipe are key to ensuring test accuracy. Some current clamps may not meet the adaptability and stability requirements for steel pipes of different specifications.

[0006] 2. Automation level: Although eddy current testing technology itself has automation advantages, the automation level and integration of existing equipment still need to be improved to improve detection efficiency and accuracy.

[0007] 3. Multi-angle detection: Traditional eddy current testing equipment may have blind spots in certain areas of the pipeline and cannot fully cover the entire pipeline surface.

[0008] Therefore, it is very necessary to invent a fixture for eddy current detection of welded pipes. Utility Model Content

[0009] In order to solve the above-mentioned technical problems, the present invention provides a fixture for eddy current testing of welded pipes, which can solve the problems of existing eddy current testing fixtures for welded pipes, such as the inability to stably clamp steel pipes, the inability to comprehensively monitor steel pipes, the low degree of automation, and the need for a large amount of labor. A fixture for eddy current testing of welded pipes: comprising a support table, a unit slide, a clamping structure, an extension plate, and a screw drive structure, wherein: the unit slides are fixedly mounted at both ends of the support table, and the clamping structure is slidably mounted on two sets of unit slides, the extension plate is fixedly mounted on the lower surface of both ends of the support table; and the screw drive structure is fixedly mounted between the two sets of extension plates.

[0010] Extension seats are fixedly installed on both ends of the support table surface, and the two groups of extension seats on the support table surface are respectively connected to the two groups of tightening structures.

[0011] An eddy current detection structure is slidably mounted on the screw drive structure, and the eddy current detection structure penetrates the supporting table and extends upward.

[0012] The tightening structure includes a sliding base, a rotating sleeve, a rotating base, a pipe support rod, a power structure and a clamping push rod, and the sliding base is slidably installed on the eddy current detection structure, and the rotating sleeve is fixedly installed on the surface of the sliding base; the rotating base is rotatably installed inside the rotating sleeve, and the pipe support rod is fixedly installed on the top of the rotating base, and the pipe support rod is inserted into the holes at both ends of the pre-detection steel pipe; the power structure is fixedly installed at the tail of the rotating base and can move with the movement of the sliding base; the clamping push rod is fixedly installed between the sliding base and the extension seat.

[0013] A tightening airbag is fixedly installed on one end of the pipeline support rod at the top of the rotating base, and an "L"-shaped air inlet pipe is provided on the outside of the support rod and is connected to the tightening airbag.

[0014] The eddy current detection structure includes a sliding base, an electrical box and an eddy current detection sensor, and the sliding base is slidably installed on the screw drive structure, and the electrical box is fixedly installed above the sliding base; the eddy current detection sensor is fixedly installed above the electrical box and extends upward after penetrating the supporting table.

[0015] A fixed clamping tube is fixedly installed above the electrical box, and the eddy current detection sensor can slide back and forth inside the fixed clamping tube. A stable movable sleeve is provided on the top of the fixed clamping tube above the electrical box, and a circular hole is opened in the middle to form a movable opening.

[0016] The tightening structure adopts two groups, which are mirror-imaged and arranged at both ends of the support table, and the pipe support rod can be rotated by the power structure, and the rotation of the pipe support rod can drive the pipe to rotate; the pipe support rod can be translated by the clamping push rod, and the pipe support rod can be extended into the interior of both ends of the pipe by translation; the tightening airbag adopts a cylindrical airbag, which can be inflated after the pipe support rod and the tightening airbag are inserted into the interior of the pipe; the tightening airbag swells after inflation and fits the inner wall of the pipe, ① Fixing and supporting the steel pipe: the pipe support rod is inserted into the holes at both ends of the steel pipe, and the steel pipe is supported by it to keep it stable during the inspection process; after the pipe support rod and the tightening airbag are inserted into the interior of the steel pipe, the tightening airbag is inflated to expand the airbag , close to the inner wall of the pipe, thereby further fixing the position of the steel pipe to prevent it from moving during detection; ② Drive the steel pipe to rotate: the power structure drives the pipe support rod to rotate by rotating the base, so that the steel pipe can rotate during the detection process. This rotation can help achieve all-round eddy current detection of the steel pipe and ensure that the detection covers the entire steel pipe surface; ③ Translation adjustment: the clamping push rod drives the pipe support rod to translate, so that the pipe support rod can be inserted into both ends of the steel pipe. This translation adjustment ensures that the clamping structure can flexibly adapt to steel pipes of different lengths; ④ Cooperate with the eddy current detection structure: the clamping structure is slidably installed on the eddy current detection structure. By cooperating with the eddy current detection structure, it is ensured that the steel pipe can remain stable as the detection head moves during the detection process, avoiding any displacement or shaking, and ensuring the accuracy of the detection.

[0017] The eddy current detection structure as a whole can be driven to and fro by the screw drive structure, and the fixed clamping tube adopts a cylindrical support tube, and the eddy current detection sensor can slide inside it and be manually adjusted by a handle extending to the outside of the fixed clamping tube; the stable movable sleeve adopts a stainless steel metal tube and can slide on the outside of the pre-detection pipeline through the movable port; the eddy current detection sensor supports the pipeline through the stable movable sleeve and the movable port, and always maintains a moving distance from the steel pipe, and has the following functions: ① Provide detection sensor support: The eddy current detection structure includes a fixed clamping tube and an electrical box, which provides support and a stable installation position for the eddy current detection sensor. The sensor can slide back and forth inside the fixed clamping tube and perform eddy current detection on the surface of the steel pipe; ② Perform eddy current detection: The eddy current detection sensor in the eddy current detection structure generates eddy current signals on the surface of the steel pipe and monitors the changes in these signals to detect defects in the steel pipe, such as cracks, holes or other irregularities. The movement of the sensor ensures comprehensive inspection of the steel pipe; ③ Realize automated inspection: The screw drive structure enables the eddy current detection structure to reciprocate, so that the sensor can perform automated inspection over the entire length of the steel pipe. This automation improves inspection efficiency and reduces manual intervention; ④ Stable inspection environment: The structure consisting of a stable moving sleeve and a moving port can slide on the outside of the steel pipe while maintaining a stable spacing, which ensures the stability and accuracy of eddy current inspection.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The setting of the tightening structure of the utility model has the following functions: ① Fixing and supporting the steel pipe: the pipe support rod is inserted into the holes at both ends of the steel pipe, supporting the steel pipe through it, so that it remains stable during the inspection process; after the pipe support rod and the tightening airbag are inserted into the interior of the steel pipe, the tightening airbag is inflated to expand the airbag and cling to the inner wall of the pipe, thereby further fixing the position of the steel pipe and preventing it from moving during inspection; ② Driving the steel pipe to rotate: the power structure drives the pipe support rod to rotate by rotating the base, so that the steel pipe can rotate during the inspection process. This rotation can help achieve all-round eddy current inspection of the steel pipe and ensure that the inspection covers the entire surface of the steel pipe; ③ Translation adjustment: the clamping push rod drives the pipe support rod to translate so that the pipe support rod can be inserted into both ends of the steel pipe. This translation adjustment ensures that the tightening structure can flexibly adapt to steel pipes of different lengths; ④ Cooperating with the eddy current detection structure: the tightening structure is slidably installed on the eddy current detection structure. By cooperating with the eddy current detection structure, it ensures that the steel pipe can remain stable as the detection head moves during the inspection process, avoiding any displacement or shaking, and ensuring the accuracy of the inspection.

[0020] 2. The setting of the eddy current detection structure of the utility model has the following functions: ① Provide detection sensor support: The eddy current detection structure includes a fixed clamping tube and an electrical box, which provide support and a stable installation position for the eddy current detection sensor. The sensor can slide back and forth inside the fixed clamping tube and perform eddy current detection on the surface of the steel pipe; ② Perform eddy current detection: The eddy current detection sensor in the eddy current detection structure detects defects in the steel pipe, such as cracks, holes or other irregularities, by generating eddy current signals on the surface of the steel pipe and monitoring the changes in these signals. The movement of the sensor ensures comprehensive detection of the steel pipe; ③ Realize automated detection: The screw drive structure enables the eddy current detection structure to reciprocate, so that the sensor can perform automated detection over the entire length of the steel pipe. This automation improves detection efficiency and reduces manual intervention; ④ Stabilize the detection environment: The structure composed of the stable moving sleeve and the moving port can slide on the outside of the steel pipe while maintaining a stable spacing, which ensures the stability and accuracy of eddy current detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model

[0022] Figure 2 It is a partial structural diagram of the utility model.

[0023] Figure 3 It is an enlarged view of point A of the present utility model.

[0024] Figure 4 It is an enlarged view of point B of the present utility model.

[0025] In the picture:

[0026] Support table 1, unit slide 2, extension seat 3, tightening structure 4, sliding base 41, rotating sleeve 42, rotating base 43, pipeline support rod 44, tightening airbag 45, power structure 46, clamping push rod 47, extension plate 5, screw drive structure 6, eddy current detection structure 7, sliding base 71, electrical box 72, fixed clamping tube 73, stable moving sleeve 74, moving port 75, eddy current detection sensor 76. DETAILED DESCRIPTION

[0027] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0028] As attached Figure 1 To the attached Figure 4 shown.

[0029] The utility model provides a fixture for eddy current detection of welded pipes, comprising a support table 1, a unit slide 2, a clamping structure 4, an extension plate 5 and a screw drive structure 6, wherein: the unit slides 2 are fixedly installed at both ends of the support table 1, and the clamping structure 4 is slidably installed on the two groups of unit slides 2, the extension plate 5 is fixedly installed on the lower surface of the two ends of the support table 1; the screw drive structure 6 is fixedly installed between the two groups of extension plates 5.

[0030] Extension seats 3 are fixedly installed at both ends of the surface of the support table 1, and the two groups of extension seats 3 on the surface of the support table 1 are respectively connected to the two groups of tightening structures 4.

[0031] An eddy current detection structure 7 is slidably mounted on the screw drive structure 6 , and the eddy current detection structure 7 passes through the support table 1 and extends upward.

[0032] The tightening structure 4 includes a sliding base 41, a rotating sleeve 42, a rotating base 43, a pipe support rod 44, a power structure 46 and a clamping push rod 47, and the sliding base 41 is slidably installed on the eddy current detection structure 7, and the rotating sleeve 42 is fixedly installed on the surface of the sliding base 41; the rotating base 43 is rotatably installed inside the rotating sleeve 42, and the pipe support rod 44 is fixedly installed on the top of the rotating base 43, and the pipe support rod 44 is inserted into the holes at both ends of the pre-detection steel pipe; the power structure 46 is fixedly installed at the tail of the rotating base 43, and can move with the movement of the sliding base 41; the clamping push rod 47 is fixedly installed between the sliding base 41 and the extension seat 3.

[0033] A tightening airbag 45 is fixedly mounted on one end of the pipe support rod 44 at the top of the rotating base 43 , and an “L”-shaped air inlet pipe is provided on the outside of the support rod 44 and is connected to the tightening airbag 45 .

[0034] The eddy current detection structure 7 includes a sliding base 71, an electrical box 72 and an eddy current detection sensor 76, and the sliding base 71 is slidably installed on the screw drive structure 6, and the electrical box 72 is fixedly installed above the sliding base 71; the eddy current detection sensor 76 is fixedly installed above the electrical box 72 and extends upward after passing through the support table 1.

[0035] A fixed clamping tube 73 is fixedly installed above the electrical box 72, and the eddy current detection sensor 76 can slide back and forth inside the fixed clamping tube 73. A stable movable sleeve 74 is provided on the top of the fixed clamping tube 73 above the electrical box 72, and a circular hole is opened in the middle to form a movable opening 75.

[0036] The tightening structure 4 adopts two groups and is mirror-imaged at both ends of the support table 1, and the pipe support rod 44 can be rotated by the power structure 46, and the rotation of the pipe support rod 44 can drive the pipe to rotate; the pipe support rod 44 can be translated by the clamping push rod 47, and the pipe support rod 44 can be extended into the interior of both ends of the pipe by translation; the tightening airbag 45 adopts a cylindrical airbag, and after the pipe support rod 44 and the tightening airbag 45 are inserted into the interior of the pipe, they can be inflated; the tightening airbag 45 swells after inflation and fits the inner wall of the pipe.

[0037] The eddy current detection structure 7 as a whole can reciprocate through the drive of the screw drive structure 6, and the fixed clamping tube 73 adopts a cylindrical support tube, and the eddy current detection sensor 76 can slide inside it and be manually adjusted through a handle extending to the outside of the fixed clamping tube 73; the stable movable sleeve 74 adopts a stainless steel metal tube and can slide on the outside of the pre-detection pipeline through the movable port 75; the eddy current detection sensor 76 supports the pipeline through the stable movable sleeve 74 and the movable port 75, and always maintains a moving distance from the steel pipe.

[0038] The working principle of the fixture for eddy current testing of welded pipes is as follows:

[0039] 1. Support and positioning:

[0040] The support table 1 provides a stable foundation for the clamp, with unit slides 2 installed at both ends and an extension plate 5 fixedly installed on the lower surface. These structures together ensure that the clamp can stably support the steel pipe and provide necessary positioning support.

[0041] 2. Tighten the steel pipe:

[0042] The clamping structure 4 is a key component of the clamp, which includes a sliding base 41, a rotating sleeve 42, a rotating base 43, a pipe support rod 44, a power structure 46 and a clamping push rod 47.

[0043] The sliding base 41 slides on the eddy current detection structure 7 and is fixed on its surface by a rotating sleeve 42 .

[0044] The rotating base 43 is installed inside the rotating sleeve 42 and drives the pipe support rod 44 to rotate. The pipe support rod 44 is inserted into the holes at both ends of the steel pipe to support and fix the position of the steel pipe.

[0045] The power structure 46 enables the pipe support rod 44 to rotate, thereby enabling the steel pipe to rotate during the inspection process, thereby improving the comprehensiveness of the inspection.

[0046] The clamping push rod 47 can drive the pipe support rod 44 to translate, so that it can adapt to steel pipes of different lengths and cling to the inner wall of the steel pipe.

[0047] 3. Inflation fixation:

[0048] The tightening airbag 45 is installed at the top of the pipe support rod 44 and is inflated through the "L"-shaped air inlet pipe. After the airbag is inflated, it expands and adheres closely to the inner wall of the steel pipe to ensure that the steel pipe will not move during the inspection process.

[0049] 4. Eddy current testing:

[0050] The eddy current detection structure 7 includes a sliding base 71 , an electrical box 72 , an eddy current detection sensor 76 , a fixed clamping tube 73 and a stabilizing movable sleeve 74 .

[0051] The eddy current detection sensor 76 is installed above the electrical box 72 and slides on the screw drive structure 6 through the sliding base 71.

[0052] The screw drive structure 6 enables the eddy current detection structure 7 to reciprocate above the steel pipe. The sensor 76 generates eddy current signals on the surface of the steel pipe and detects changes in the signals to evaluate the quality of the steel pipe.

[0053] The fixed clamping tube 73 ensures that the eddy current detection sensor 76 performs detection at the correct position, and maintains an appropriate distance from the steel pipe through the moving opening 75 to stabilize the position of the sensor.

[0054] 5. Data processing and transmission:

[0055] The electrical box 72 contains electronic equipment for processing eddy current signals. The data detected by the sensor 76 is transmitted to the electrical box 72 and processed. The processed data can be used to evaluate the quality of the steel pipe and the test results.

[0056] Summarize

[0057] The fixture for eddy current testing of welded pipes stably supports and clamps the steel pipe through the support table 1 and the clamping structure 4, and fixes it with the clamping airbag 45. The eddy current detection structure 7 performs detection through the eddy current detection sensor 76, and the screw drive structure 6 ensures the automation and accuracy of the detection. The entire system efficiently realizes the quality inspection of the steel pipe and ensures the accuracy of the test results.

[0058] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the scope of protection of the utility model.

Claims

1. A fixture for eddy current testing of welded pipes, characterized by: The invention comprises a support table (1), a unit slideway (2), a tightening structure (4), an extension plate (5) and a screw drive structure (6), wherein: the unit slideways (2) are fixedly mounted at both ends of the support table (1), and the tightening structure (4) is slidably mounted on the two sets of unit slideways (2); the extension plate (5) is fixedly mounted on the lower surface of both ends of the support table (1); and the screw drive structure (6) is fixedly mounted between the two sets of extension plates (5).

2. A fixture for eddy current testing of welded pipes according to claim 1, characterized in that: Extension seats (3) are fixedly mounted on both ends of the surface of the support table (1), and the two groups of extension seats (3) on the surface of the support table (1) are respectively connected to the two groups of tightening structures (4).

3. The fixture for eddy current testing of welded pipes according to claim 1, characterized in that: An eddy current detection structure (7) is slidably mounted on the screw drive structure (6), and the eddy current detection structure (7) penetrates the support table (1) and extends upward.

4. The fixture for eddy current testing of welded pipes according to claim 1, characterized in that: The tightening structure (4) includes a sliding base (41), a rotating sleeve (42), a rotating base (43), a pipe support rod (44), a power structure (46) and a clamping push rod (47), and the sliding base (41) is slidably mounted on the eddy current detection structure (7), and the rotating sleeve (42) is fixedly mounted on the surface of the sliding base (41); the rotating base (43) is rotatably mounted inside the rotating sleeve (42), and the pipe support rod (44) is fixedly mounted on the top end of the rotating base (43), and the pipe support rod (44) is inserted into the holes at both ends of the pre-detection steel pipe; the power structure (46) is fixedly mounted on the tail of the rotating base (43) and can move with the movement of the sliding base (41); the clamping push rod (47) is fixedly mounted between the sliding base (41) and the extension seat (3).

5. The fixture for eddy current testing of welded pipes according to claim 4, characterized in that: A tightening airbag (45) is fixedly mounted on one end of the pipe support rod (44) at the top of the rotating base (43), and an "L"-shaped air inlet pipe is provided on the outside of the support rod (44) and is connected to the tightening airbag (45).

6. The fixture for eddy current testing of welded pipes according to claim 3, characterized in that: The eddy current detection structure (7) comprises a sliding base (71), an electrical box (72) and an eddy current detection sensor (76), wherein the sliding base (71) is slidably mounted on the screw drive structure (6), and the electrical box (72) is fixedly mounted above the sliding base (71); the eddy current detection sensor (76) is fixedly mounted above the electrical box (72) and extends upward after penetrating the support table (1).

7. The fixture for eddy current testing of welded pipes according to claim 6, characterized in that: A fixed clamping tube (73) is fixedly installed above the electrical box (72), and the eddy current detection sensor (76) can slide back and forth inside the fixed clamping tube (73). A stable movable sleeve (74) is provided on the top of the fixed clamping tube (73) above the electrical box (72), and a circular hole is opened in the middle to form a movable opening (75).

8. The fixture for eddy current testing of welded pipes according to claim 5, characterized in that: The tightening structure (4) is provided in two groups and is mirror-imaged at both ends of the support table (1), and the pipeline support rod (44) can be driven by the power structure (46) to rotate, and the pipeline support rod (44) can drive the pipeline to rotate when it rotates; the pipeline support rod (44) can be driven by the clamping push rod (47) to translate, and the pipeline support rod (44) can be extended into the interior of both ends of the pipeline by translation; the tightening airbag (45) is a cylindrical airbag, and after the pipeline support rod (44) and the tightening airbag (45) are inserted into the interior of the pipeline, air can be inflated into the interior thereof; after the tightening airbag (45) is inflated, it swells and fits the inner wall of the pipeline.

9. The fixture for eddy current testing of welded pipes according to claim 7, characterized in that: The eddy current detection structure (7) as a whole can be driven by the screw drive structure (6) to perform reciprocating motion, and the fixed clamping tube (73) adopts a cylindrical support tube, and the eddy current detection sensor (76) can slide inside the cylindrical support tube and be manually adjusted by a handle extending to the outside of the fixed clamping tube (73); the stable movable sleeve (74) adopts a stainless steel metal tube and can slide on the outside of the pre-detection pipeline through the movable port (75); the eddy current detection sensor (76) supports the pipeline through the stable movable sleeve (74) and the movable port (75), and always maintains a movable distance with the steel pipe.

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