Nondestructive testing device for civil engineering
By using the linkage design of the arc-shaped guide rail and the ring rack, and the worm gear drive mechanism, the problems of unstable magnetized probe distance and inconvenient clamping in traditional non-destructive testing are solved, and high-precision and efficient pipeline weld inspection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN CHUTIAN ENG TESTING CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-05-05
AI Technical Summary
In traditional non-destructive testing methods, it is difficult for magnetized probes to maintain a stable distance from pipe welds, leading to testing errors. Furthermore, the existing equipment has a cumbersome clamping process, making it difficult to ensure that the clamping parts coincide with the center line of the pipe, which affects the testing results.
The design incorporates an arc-shaped guide rail and a ring rack, along with a worm gear drive mechanism and multiple limit mechanisms, to ensure that the inspection mechanism moves smoothly along the circumference of the pipe weld. The clamping force can be adjusted by using limit nuts to accommodate different pipe diameters.
It significantly improves detection accuracy and reliability, enhances detection efficiency, and avoids errors caused by unstable distance and clamping eccentricity.
Smart Images
Figure CN224203120U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of civil engineering technology, and specifically relates to a non-destructive testing device for civil engineering. Background Technology
[0002] As a critical facility for industrial production and energy transmission, the quality of welds in pressure pipelines directly affects their safety and reliability. Because pressure pipelines are often exposed to high temperatures, high pressures, and corrosive media, weld defects such as cracks, porosity, and slag inclusions can lead to leaks or even explosions. Therefore, non-destructive testing of welds is of paramount importance.
[0003] However, traditional inspection methods typically involve operators holding a magnetized probe and moving it along the outer wall of the pipe. Since the weld joints of the pipe are circular, it is difficult for workers to ensure that the magnetized probe maintains a proper distance from the weld point during scanning, resulting in inspection errors. Furthermore, when inspecting the lower weld seams of the pipe, the positional constraints make operation and observation inconvenient. Existing inspection devices are cumbersome to operate during clamping, requiring multiple adjustments to the length of each screw to clamp the outer wall of the pipe. It is difficult to ensure that the center line of the clamping device coincides with the center line of the pipe, affecting the inspection results. Utility Model Content
[0004] To overcome the limitations of traditional inspection methods in the background art, which typically involve operators holding a magnetized probe and moving it along the outer wall of the pipe, and because the weld joints of the pipe are annular, it is difficult for workers to ensure that the magnetized probe maintains a suitable distance from the weld joint during scanning, resulting in inspection errors. Furthermore, when inspecting the lower weld seams of the pipe, the positional constraints make operation and observation inconvenient. Most existing inspection devices are cumbersome to operate during clamping, requiring multiple adjustments to the length of each screw to clamp the outer wall of the pipe, making it difficult to ensure that the center line of the clamping component coincides with the center line of the pipe, thus affecting the inspection effect. This utility model provides a civil engineering... The non-destructive testing device features a linkage design between an arc-shaped guide rail and a ring-shaped rack, ensuring smooth movement of the testing mechanism along the circumference of the pipe weld. This avoids the testing errors caused by unstable distance in traditional handheld probes, significantly improving testing accuracy and reliability. A worm gear drive mechanism allows for simultaneous adjustment of the opening and closing of the arc-shaped guide rails on both sides by rotating a handwheel, enabling rapid clamping and disassembly and greatly improving testing efficiency. A spring-supported design with multiple limit mechanisms ensures that the support block automatically conforms to the outer wall of the pipe under spring action, ensuring that the clamping centerline coincides with the pipe centerline and avoiding testing errors caused by clamping eccentricity. Simultaneously, the limit nuts allow for flexible adjustment of the clamping force to accommodate different pipe diameters.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A non-destructive testing device for civil engineering mainly includes a mounting base, a semi-hoop, an arc-shaped guide rail, a testing mechanism, a ring rack, a limiting mechanism, and a driving mechanism. The mounting base is equipped with a driving mechanism, which includes a worm, a turbine, a handwheel, and a connecting shaft. Two vertical connecting shafts are mounted on the mounting base, and turbines are installed on the connecting shafts. A worm that meshes with the two turbines is mounted on the mounting base via bearings. One end of the worm passes through the mounting base and is equipped with a handwheel. An openable arc-shaped guide rail is mounted on the end face of the turbine. The guide rail has a semi-hoop installed on its arc-shaped guide rail. The end of the semi-hoop is provided with a ring rack. A detection mechanism that is linked to the ring rack is installed on the arc-shaped guide rail. Multiple sets of limiting mechanisms are evenly arranged on the semi-hoop along the circumferential direction. The limiting mechanism includes a limiting cylinder, a support rod, a spring, a limiting nut, and a support block. The limiting cylinder with external threads is provided on the semi-hoop in the radial direction. The limiting nut is threadedly connected to the limiting cylinder. The support rod is slidably installed in the limiting cylinder. A support block is installed at its bottom end. The top end passes through the semi-hoop and is connected to a nut. The spring is sleeved on the support rod. Its bottom end abuts against the support block, and its top end abuts against the limiting nut.
[0006] The detection mechanism includes a motor, a slider, a gear, a connecting rod, a detection probe, and a limiting screw. The motor is slidably mounted on an arc-shaped guide rail via the slider. A gear that meshes with a ring rack is mounted on the output shaft of the motor. A fixed cylinder is provided on the slider. The connecting rod is slidably mounted inside the fixed cylinder and locked by the limiting screw. A detection probe facing the outer wall of the pipe is installed at the bottom of the connecting rod.
[0007] The bottom surface of the support block is provided with an anti-slip rubber pad, and the surface of the anti-slip rubber pad is provided with staggered raised textures.
[0008] The meshing surface between the worm and the turbine is a helical gear structure, and the helix angle of the worm is ≤5°.
[0009] The connecting rod is equipped with scale markings for adjusting the contact distance between the detection probe and the outer wall of the pipe.
[0010] The bottom of the slider has a T-groove structure in cross-section, and the side wall of the arc-shaped guide rail is provided with a matching T-shaped protrusion.
[0011] The beneficial effects of this utility model are:
[0012] This invention utilizes a linkage design between an arc-shaped guide rail and a ring-shaped rack to ensure smooth movement of the inspection mechanism along the circumference of the pipe weld, avoiding inspection errors caused by unstable distance in traditional handheld probes, and significantly improving inspection accuracy and reliability. A worm gear drive mechanism allows for simultaneous adjustment of the opening and closing of the arc-shaped guide rails on both sides by rotating a handwheel, enabling rapid clamping and disassembly and greatly improving inspection efficiency. Through a spring-supported design with multiple sets of limiting mechanisms, the support block automatically conforms to the outer wall of the pipe under the action of the spring, ensuring that the clamping centerline coincides with the pipe centerline, avoiding inspection errors caused by clamping eccentricity. Simultaneously, the limiting nut allows for flexible adjustment of the clamping force to adapt to different pipe diameters. Attached Figure Description
[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention.
[0014] Figure 2 This is another three-dimensional schematic diagram of this utility model.
[0015] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.
[0016] Figure 4 This is a three-dimensional schematic diagram of the drive mechanism in its installation state.
[0017] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle. Detailed Implementation
[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.
[0019] This utility model discloses a non-destructive testing device for civil engineering. The device mainly includes a mounting base 1, a semi-hoop 2, an arc-shaped guide rail 3, a testing mechanism 4, a ring rack 5, a limiting mechanism 6, and a driving mechanism 7. The driving mechanism 7 is mounted on the mounting base 1. The driving mechanism 7 includes a worm gear 701, a turbine 702, a handwheel 703, and a connecting shaft 704. Two vertical connecting shafts 704 are mounted on the mounting base 1, and a turbine 702 is mounted on each connecting shaft 704. 02. A worm gear 401, meshing with two turbines 402, is mounted on the mounting base 1 via bearings. One end of the worm gear 401 passes through the mounting base 1 and is fitted with a handwheel 403. An openable arc-shaped guide rail 3 is mounted on the end face of the turbine 702. A semi-hoop 2 is mounted on the arc-shaped guide rail 3, and an annular rack 5 is provided at the end of the semi-hoop 2. A detection mechanism 4, which is linked to the annular rack 5, is mounted on the arc-shaped guide rail 3. The detection mechanism 4 includes a motor 401, a slider 402, a gear 403, a connecting rod 404, and a detection probe 4. 05. A limiting screw 406 and a motor 401 are slidably mounted on an arc-shaped guide rail 3 via a slider 402. A gear 403 that meshes with a ring rack 5 is mounted on the output shaft of the motor 401. A fixed cylinder 4021 is provided on the slider 402. A connecting rod 404 is slidably mounted in the fixed cylinder 4021 and locked by the limiting screw 406. A detection probe 405 facing the outer wall of the pipe is installed at the bottom of the connecting rod 404. Multiple sets of limiting mechanisms 6 are evenly arranged along the circumference on the semi-hoop 2. The limiting mechanism... 6 includes a limiting cylinder 601, a support rod 602, a spring 603, a limiting nut 604, and a support block 605. The limiting cylinder 601, which has an external thread along the radial direction on the semi-hoop 2, is threadedly connected to the limiting nut 604. The support rod 602 is slidably installed inside the limiting cylinder 601, with the support block 605 installed at its bottom end and the top end passing through the semi-hoop 2 and connected to a nut. The spring 603 is sleeved on the support rod 602, with its bottom end abutting against the support block 605 and its top end abutting against the limiting nut 604.
[0020] In use, the operator first adjusts the preload of the spring 603 by adjusting the position of the upper limit nut 604 on the limit cylinder 601 according to the pipe diameter, so that the support block 605 can be firmly attached to the pipe after clamping, preventing the device from sliding or shifting during the inspection process. Next, the operator turns the handwheel 703, which drives the worm gear 701 to rotate. The worm gear 701 drives the turbines 702 on both sides to rotate, thereby driving the arc-shaped guide rail 3 and the half-hoop 2 to open outward. Then, the half-hoop 2 is wrapped around the outer wall of the pipe to be inspected, and the handwheel 703 is turned in the opposite direction, so that the arc-shaped guide rail 3 and the half-hoop 2 close inward. During the closing process, the support blocks 605 of the multiple sets of limit mechanisms 6 automatically press against the pipe surface under the action of the spring 603, ensuring that the center line of the half-hoop 2 coincides with the center line of the pipe. When the ends of the arc-shaped guide rail 3 make contact, Loosen the handwheel 703; then, loosen the limiting screw 406 on the fixed cylinder 4021 and slide the connecting rod 404 along the fixed cylinder 4021 to maintain the optimal detection distance between the detection probe 405 and the pipe weld. Then, tighten the limiting screw 406 to fix the position of the connecting rod 404. Start the motor 401, which drives the gear 403 to mesh and rotate along the annular rack 5 at the end of the half-hoop 2, so that the slider 402 moves smoothly along the arc-shaped guide rail 3, thereby driving the detection probe 405 to move circumferentially along the pipe circumferential seam to collect weld data in real time. After the detection is completed, turn off the motor 401, and the detection probe 405 stops moving, completing the pipe weld detection. The operator rotates the handwheel 703 in the opposite direction to make the worm gear 701 drive the turbine 702 to rotate, and the half-hoop 2 opens, so that the device can be removed from the pipe for the next detection.
[0021] The bottom surface of the support block 605 is provided with an anti-slip rubber pad, and the surface of the anti-slip rubber pad is provided with staggered raised textures; this enhances the friction coefficient between the support block 605 and the outer wall of the pipe, effectively preventing the device from sliding or displacing during the detection process. The elastic properties of the rubber pad can compensate for minor unevenness on the pipe surface, ensuring full contact between the support block 605 and the outer wall of the pipe.
[0022] The meshing surface of the worm 701 and the turbine 702 is a helical gear structure, and the helix angle of the worm 701 is ≤5°. The self-locking characteristic of the small helix angle enables the device to maintain a stable clamping state during the detection process, and the half clamp 2 will not be accidentally loosened due to vibration or external force, which greatly improves the safety and reliability of the detection process.
[0023] The connecting rod is provided with a scale mark 4041 for adjusting the contact distance between the detection probe 405 and the outer wall of the pipe; the scale mark provides the operator with a precise distance reference, making the adjustment of the distance between the detection probe 405 and the outer wall of the pipe more precise and improving the accuracy of the detection data.
[0024] The bottom cross-section of the slider 402 is a T-groove structure, and the side wall of the arc-shaped guide rail 3 is provided with a matching T-shaped protrusion 301; this not only ensures the smoothness of the slider 402 moving along the guide rail, but also effectively prevents the slider 402 from deflecting or detaching during the movement.
[0025] Work process:
[0026] In use, the operator first adjusts the preload of the spring 603 by adjusting the position of the upper limit nut 604 on the limit cylinder 601 according to the pipe diameter, so that the support block 605 can be firmly attached to the pipe after clamping, preventing the device from sliding or shifting during the inspection process. Next, the operator turns the handwheel 703, which drives the worm gear 701 to rotate. The worm gear 701 drives the turbines 702 on both sides to rotate, thereby driving the arc-shaped guide rail 3 and the half hoop 2 to open outward. Then, the half hoop 2 is wrapped around the outer wall of the pipe to be inspected, and after turning the handwheel 703 in the opposite direction, the arc-shaped guide rail 3 and the half hoop 2 are opened outward. The semi-hoop 2 closes inward. During the closing process, the support blocks 605 of the multiple sets of limiting mechanisms 6 automatically press against the pipe surface under the action of the spring 603, ensuring that the center line of the semi-hoop 2 coincides with the center line of the pipe. After the ends of the arc-shaped guide rail 3 make contact, the handwheel 703 is released. Then, the limiting screw 406 on the fixed cylinder 4021 is released, and the connecting rod 404 slides along the fixed cylinder 4021 to keep the detection probe 405 at the optimal detection distance from the pipe weld. Then, the limiting screw 406 is tightened to fix the position of the connecting rod 404. The motor 401 is started, driving the gear 403 along the semi-hoop. The ring rack 5 at both ends meshes and rotates, causing the slider 402 to move smoothly along the arc-shaped guide rail 3, thereby driving the detection probe 405 to move circumferentially along the pipe circumferential seam, collecting weld data in real time. After the inspection is completed, the motor 401 is turned off, and the detection probe 405 stops moving, completing the pipe weld inspection. The operator rotates the handwheel 703 in the opposite direction, causing the worm gear 701 to drive the turbine 702 to rotate, opening the half-hoop 2, allowing the device to be removed from the pipe for the next inspection. This utility model, through the linkage design of the arc-shaped guide rail and the ring rack, ensures that the inspection mechanism moves along the pipe weld. The probe moves smoothly in the circumferential direction, avoiding detection errors caused by unstable distance in traditional handheld probes, significantly improving detection accuracy and reliability. A worm gear drive mechanism allows for simultaneous adjustment of the opening and closing of the two arc-shaped guide rails by rotating the handwheel, enabling rapid clamping and disassembly and greatly improving detection efficiency. Through a spring-supported design with multiple limit mechanisms, the support block automatically conforms to the outer wall of the pipe under the action of the spring, ensuring that the clamping centerline coincides with the pipe centerline, avoiding detection errors caused by clamping eccentricity. Simultaneously, the limit nut allows for flexible adjustment of the clamping force to adapt to different pipe diameters.
[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.
Claims
1. A non-destructive testing device for civil engineering, characterized in that: The non-destructive testing device for civil engineering includes a mounting base (1), a semi-hoop (2), an arc-shaped guide rail (3), a testing mechanism (4), a ring rack (5), a limiting mechanism (6), and a driving mechanism (7). The driving mechanism (7) is mounted on the mounting base (1). The driving mechanism (7) includes a worm (701), a turbine (702), a handwheel (703), and a connecting shaft (704). Two vertical connecting shafts (704) are mounted on the mounting base (1). A turbine (702) is provided on the connecting shaft (704). A worm (401) meshing with the two turbines (702) is mounted on the mounting base (1) via bearings. One end of the worm (401) passes through the mounting base (1) and is equipped with a handwheel (403). An openable arc-shaped guide rail (3) is mounted on the end face of the turbine (702). A semi-hoop (2) is mounted on the arc-shaped guide rail (3). The end of the half hoop (2) is provided with an annular rack (5), and the arc-shaped guide rail (3) is equipped with a detection mechanism (4) that is linked with the annular rack (5). Multiple sets of limiting mechanisms (6) are evenly arranged on the half hoop (2) along the circumferential direction. The limiting mechanism (6) includes a limiting cylinder (601), a support rod (602), a spring (603), a limiting nut (604), and a support block (605). The half hoop (2) is provided with a limiting cylinder (601) with external threads along the radial direction. The limiting cylinder (601) is threadedly connected to the limiting nut (604). The support rod (602) is slidably installed in the limiting cylinder (601). The bottom end of the supporting rod is equipped with a support block (605), and the top end passes through the half hoop (2) and is connected with a nut. The spring (603) is sleeved on the support rod (602). Its bottom end is pressed against the support block (605), and its top end is pressed against the limiting nut (604).
2. The non-destructive testing device for civil engineering as described in claim 1, characterized in that: The detection mechanism (4) includes a motor (401), a slider (402), a gear (403), a connecting rod (404), a detection probe (405), and a limiting screw (406). The motor (401) is slidably mounted on the arc-shaped guide rail (3) via the slider (402). The output shaft of the motor (401) is equipped with a gear (403) that meshes with the ring rack (5). A fixed cylinder (4021) is provided on the slider (402). The connecting rod (404) is slidably mounted in the fixed cylinder (4021) and locked by the limiting screw (406). A detection probe (405) facing the outer wall of the pipe is installed at the bottom of the connecting rod (404).
3. A non-destructive testing device for civil engineering as described in claim 1 or 2, characterized in that: The bottom surface of the support block (605) is provided with an anti-slip rubber pad, and the surface of the anti-slip rubber pad is provided with staggered raised textures.
4. A non-destructive testing device for civil engineering as described in claim 1 or 2, characterized in that: The meshing surface of the worm (701) and the turbine (702) is a helical gear structure, and the helix angle of the worm (701) is ≤5°.
5. The non-destructive testing device for civil engineering as described in claim 2, characterized in that: The connecting rod (404) is provided with scale markings for adjusting the contact distance between the detection probe (405) and the outer wall of the pipe.
6. A non-destructive testing device for civil engineering as described in claim 1 or 2, characterized in that: The bottom cross-section of the slider (402) is a T-groove structure, and the side wall of the arc guide rail (3) is provided with a matching T-shaped protrusion (301).