A welding bellows profile detection device

Abstract

The application discloses a kind of welded bellows profile detection devices, belong to welded bellows detection technical field, including platform, inner pneumatic component and outer pneumatic component, the upper surface of platform is fixedly installed with support by vertical plate, the lower surface of support is equipped with clamping assembly, clamping assembly is fixed with positioning tray cooperation clamping welded bellows, and inner pneumatic component and outer pneumatic component are respectively used to measure the inner diameter, outer diameter and roundness of welded bellows, rotating power assembly is equipped on support, the present application adopts back pressure type pneumatic ranging principle, is non-contact measurement, and will not produce measuring force, so it will not be pressed thin-walled welded bellows;And not affected by surface metal reflection, welding slag oil stain, resolution can reach micron level, by the gap value of outlet head and wave crest, wave trough cylindrical surface combined outlet head preset radial coordinate, can directly calculate wave crest outer diameter, wave trough inner diameter and roundness absolute data, without additional configuration calibration turntable, detection stability is better.

Description

Technical Field

[0001] This invention belongs to the field of welded corrugated pipe inspection technology, and specifically provides a welded corrugated pipe contour inspection device. Background Technology

[0002] Welded bellows are elastic elements made by sequentially welding multiple diaphragms. A typical manufacturing process involves first welding two diaphragms together to form an inner ring, then welding multiple diaphragm pairs together to form an outer ring. This type of bellows is widely used in air conditioning and refrigeration systems, vacuum equipment, and other fields. The diameter accuracy, roundness, and coaxiality of the peaks and troughs, as well as the weld quality of the beaded area between the peaks and troughs, directly affect the sealing performance and service life. Therefore, welded bellows require comprehensive contour inspection before leaving the factory, including peak outer diameter, trough inner diameter, roundness, and coaxiality. The main inspection method used is laser inspection; however, existing inspection methods have significant shortcomings when applied to welded bellows. (1) The welded bellows is a periodic variable radius curved surface. The peaks will block the light path of the troughs and the slope between the peaks, resulting in blind spots in the bottom of the troughs and the outer weld area. The blind spots are more serious in deep-wave or multi-layer bellows, which cannot cover the full contour inspection requirements. (2) The surface of stainless steel after welding has strong metallic reflection and welding slag residue. After laser irradiation, it is easy to cause scattering or overexposure, resulting in distorted morphological data and low accuracy in identifying defects such as weld undercut, weld bead, and misalignment. (3) Laser measurement only outputs relative morphological data. If it is necessary to obtain the absolute diameter and roundness data of the peaks and valleys, a high-precision turntable and calibration reference are required, which makes the system complex.

[0003] Therefore, there is an urgent need for a contour detection device adapted to the structural characteristics of welded corrugated pipes to address the shortcomings of existing detection methods in terms of blind spots, accuracy, and multi-index collaborative detection. Summary of the Invention

[0004] To address the above problems, the present invention provides a welding corrugated pipe contour detection device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a welded corrugated pipe contour detection device, comprising a platform, an inner pneumatic component, and an outer pneumatic component. A support is fixedly installed on the upper surface of the platform via a vertical plate, and both the inner and outer pneumatic components are rotatably mounted on the support. A clamping component is mounted on the lower surface of the support. A support lifting component is mounted on the platform, and a positioning tray is fixedly installed on the upper surface of the support lifting component. The clamping component cooperates with the positioning tray to clamp and fix the welded corrugated pipe. The inner and outer pneumatic components are respectively used to measure the inner diameter, outer diameter, and roundness of the welded corrugated pipe. A rotational power component is mounted on the support, and the output end of the rotational power component drives the inner pneumatic component to rotate. A connecting rod is mounted between the inner and outer pneumatic components.

[0006] Furthermore, the rotational power assembly includes a rotational motor, which is fixedly mounted on the lower surface of the support. The output end of the rotational motor is located above the support and is fixedly mounted with a rotational drive wheel.

[0007] Furthermore, the internal pneumatic assembly includes an internal pneumatic rotation assembly, an internal pneumatic lifting assembly, and an internal pneumatic ranging assembly, and a fixed bracket is fixedly installed on the upper surface of the support. The internal pneumatic lifting assembly includes a lifting motor, which is fixedly mounted on a fixed bracket. An internal lifting screw is fixedly mounted on the output end of the lifting motor, and a lifting drive wheel is fixedly mounted on the internal lifting screw. The internal pneumatic rotating assembly includes a driven wheel and an internal pneumatic rotating cylinder. The internal pneumatic rotating cylinder is screwed onto an internal lifting screw, and the driven wheel is fixedly installed on the outer surface of the internal pneumatic rotating cylinder. The driven wheel and the driving wheel are connected by a chain drive. The internal pneumatic ranging assembly is fixedly installed at the lower end of the internal pneumatic rotating cylinder.

[0008] Furthermore, an installation plate is fixedly installed at the lower end of the inner pneumatic rotary drum, and an adjusting electric push rod is fixedly installed on both side walls of the installation plate, and the output end of the adjusting electric push rod is rotatably equipped with an inner pneumatic ranging component.

[0009] Furthermore, the external pneumatic assembly includes an external pneumatic rotation assembly, an external pneumatic lifting assembly, and an external pneumatic ranging assembly, and the internal pneumatic ranging assembly has the same structure as the external pneumatic ranging assembly; The external pneumatic rotating assembly includes an external pneumatic rotating cylinder. A sliding groove is provided on the upper surface of the support, and the external pneumatic rotating cylinder is movably assembled in the sliding groove. An installation rod is fixedly installed at the lower end of the external pneumatic rotating cylinder, and the external pneumatic ranging assembly is rotatably assembled on the installation rod. Guide cylinders are fixedly installed at both ends of the connecting rod, and limit rods are vertically fixedly installed on the inner walls of the guide cylinders. The outer walls of the inner pneumatic rotating cylinder and the outer pneumatic rotating cylinder are provided with slots that match the limit rods.

[0010] Furthermore, a connecting rod is fixedly installed on the outer wall of the outer pneumatic rotating cylinder, and the connecting rod is an arc-shaped rod bent at 180°. A secondary connecting cylinder is fixedly installed on the outer end of the connecting rod, and an installation rod and an outer pneumatic ranging assembly are assembled on the lower end of the secondary connecting cylinder.

[0011] Furthermore, the external pneumatic lifting assembly includes a follower bracket, which is movably mounted on a support. The upper surface of the follower bracket has a circular hole. An external lifting screw is screwed to the inner wall of the external pneumatic rotary cylinder. The upper end of the external lifting screw passes through the circular hole and is fixedly installed with a lifting driven wheel. The lifting driven wheel and the lifting driving wheel are connected by a chain drive.

[0012] Furthermore, a slider is fixedly installed on the outer wall of the follower bracket, and a slide rail is fixedly installed on the upper surface of the support, with the slider being moved and assembled within the slide rail.

[0013] Furthermore, the external pneumatic ranging assembly includes a housing, a pneumatic probe, and a baffle plate. The pneumatic probe is movably mounted within the housing. A fine-tuning electric push rod is fixedly installed on the outer wall of the housing, and one end of the pneumatic probe is fixedly mounted on the output end of the fine-tuning electric push rod. A rotating connector is mounted on the side wall of the housing. An air outlet is fixedly installed on the other end of the pneumatic probe. Rectangular rods are fixedly installed on both the upper and lower surfaces of the air outlet, and the baffle plate is movably mounted on the rectangular rods. A positioning rod is fixedly installed on the edge of the other end of the pneumatic probe. Furthermore, a positioning buckle is fixedly installed at the end of the positioning rod, and a threaded rod is engaged inside the positioning buckle. The threads at both ends of the threaded rod have opposite directions. Threaded holes are opened at corresponding positions of the two shielding plates, and the shielding plates are screwed onto the threaded rod through the threaded holes. A fine-tuning driven wheel is fixedly installed at the upper end of the threaded rod. A fine-tuning motor is fixedly installed at one end of the pneumatic probe. A fine-tuning driving wheel is fixedly installed at the output end of the fine-tuning motor, and the fine-tuning driving wheel and the fine-tuning driven wheel are connected by chain drive. A laser probe is fixedly installed on the surface of the shielding plate.

[0014] Furthermore, each of the two shielding plates has a through hole at a corresponding position, and a guide rod is inserted into the through hole. A limit block is fixedly installed in the middle of the guide rod, and the limit block is located between the two shielding plates.

[0015] The beneficial effects of using this invention are: This invention adopts the back pressure pneumatic ranging principle, which is a non-contact measurement and does not generate measuring force, thus avoiding damage to thin-walled welded corrugated pipes. It is also unaffected by surface metal reflections, welding slag, or oil stains, and its resolution can reach the micrometer level. By combining the gap value between the air outlet head and the cylindrical surface of the crest and trough with the preset radial coordinates of the air outlet head, the absolute data of the outer diameter of the crest, the inner diameter of the trough, and the roundness can be directly calculated without the need for an additional calibration turntable, resulting in better detection stability.

[0016] This invention incorporates a baffle plate that is inserted into the gap between adjacent wave crests during detection. This baffle plate, in conjunction with the air outlet head, forms a localized aerodynamic ranging space, concentrating the airflow onto the cylindrical surface being measured and preventing ranging errors caused by airflow dispersion. Simultaneously, the laser probe is positioned along with the baffle plate on the sloping area between the wave crests, avoiding optical path obstruction by adjacent wave crests. This allows for direct detection of weld damage and diaphragm defects on the sloping surface between wave crests and troughs, compensating for the inability of purely pneumatic solutions to identify surface damage and solving the blind zone problem of purely laser solutions.

[0017] The inner and outer pneumatic components of this invention rotate synchronously via a connecting rod. The outer pneumatic components are configured as two and are distributed 180° relative to each other via a 180° arc-shaped connecting rod. The inner and outer pneumatic ranging components on the same side are arranged opposite each other, so that the radial impact force of the pneumatic air outlet cancels each other out, avoiding vibration of the thin-walled bellows caused by the impact of airflow on one side, reducing the drift error of the pneumatic signal and the laser image, and improving the detection accuracy. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the application of the present invention.

[0019] Figure 2 This is one of the three-dimensional schematic diagrams of Embodiment 1 of the present invention.

[0020] Figure 3 This is a second perspective view of Embodiment 1 of the present invention.

[0021] Figure 4 This is one of the three-dimensional schematic diagrams of the internal pneumatic component and the external pneumatic component in Embodiment 1 of the present invention.

[0022] Figure 5 This is the second perspective view of the internal and external pneumatic components of Embodiment 1 of the present invention.

[0023] Figure 6 This is a three-dimensional schematic diagram of the connecting rod in Embodiment 1 of the present invention.

[0024] Figure 7 This is one of the three-dimensional schematic diagrams of the external pneumatic ranging component in Embodiment 1 of the present invention.

[0025] Figure 8 This is the second three-dimensional schematic diagram of the external pneumatic ranging component in Embodiment 1 of the present invention.

[0026] Figure 9 This is a schematic diagram showing the distribution of the internal and external pneumatic ranging components in Embodiment 1 of the present invention.

[0027] Figure 10 This is a schematic diagram showing the distribution of the internal and external pneumatic ranging components in Embodiment 3 of the present invention.

[0028] The reference numerals in the figures include: 1. Platform; 11. Supporting lifting components; 12. Positioning pallet; 2. Support; 21. Clamping assembly; 22. Slide rail; 23. Fixed bracket; 24. Slide groove; 3. Rotate the power assembly; 31. Rotate the motor; 32. Rotate the drive wheel; 4. Internal pneumatic rotating assembly; 41. Rotating driven wheel; 42. Internal pneumatic rotating cylinder; 43. Mounting plate; 44. Adjusting electric push rod. 5. Internal pneumatic lifting assembly; 51. Lifting motor; 52. Lifting drive wheel; 6. Internal pneumatic ranging component; 7. External pneumatic rotating assembly; 71. External pneumatic rotating cylinder; 72. Connecting rod; 721. Guide cylinder; 722. Limiting rod; 73. Mounting rod; 74. Connecting rod; 75. Secondary connecting cylinder. 8. External pneumatic lifting assembly; 81. Follower bracket; 811. Slider; 82. Lifting driven wheel; 83. External lifting screw; 9. External pneumatic ranging assembly; 91. Housing; 911. Fine-tuning electric push rod; 912. Rotating connector; 92. Pneumatic probe; 921. Air outlet; 922. Rectangular rod; 923. Positioning rod; 93. Fine-tuning motor; 931. Fine-tuning drive wheel; 94. Baffle plate; 941. Laser probe; 95. Threaded rod; 951. Fine-tuning driven wheel; 96. Guide rod; 961. Limit block. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] Reference Figures 1 to 9A welded corrugated pipe contour detection device includes a platform 1, an inner pneumatic component, and an outer pneumatic component. A support 2 is fixedly installed on the upper surface of the platform 1 via a vertical plate, and both the inner and outer pneumatic components are rotatably mounted on the support 2. A clamping component 21 is mounted on the lower surface of the support 2. A support lifting component 11 is mounted on the platform 1, and a positioning tray 12 is fixedly installed on the upper surface of the support lifting component 11. The clamping component 21 and the positioning tray 12 cooperate to clamp and fix the welded corrugated pipe. The inner and outer pneumatic components are used to measure the inner diameter, outer diameter, and roundness of the welded corrugated pipe, respectively. A rotation power component 3 is mounted on the support 2, and the output end of the rotation power component 3 drives the inner pneumatic component to rotate. A connecting rod 72 is mounted between the inner and outer pneumatic components.

[0032] This device clamps and fixes the flange at the upper end of the welded bellows using the clamping assembly 21, and provides auxiliary support and positioning for the flange at the lower end of the welded bellows using the positioning tray 12, ensuring that the flanges on both the upper and lower sides are coaxial and that the welded bellows is in a vertical position.

[0033] The internal pneumatic component is driven to rotate inside the welded bellows by rotating the power component 3, and at the same time, under the connection of the connecting rod 72, the external pneumatic component is driven to rotate outside the welded bellows for testing.

[0034] Both the internal and external pneumatic components employ the back-pressure pneumatic ranging principle to measure the distance between the cylindrical surfaces of the inner and outer weld joints of the welded bellows. The internal pneumatic component measures the diameter and roundness at the troughs of the welded bellows, while the external pneumatic component measures the diameter and roundness at the peaks of the welded bellows. The internal and external pneumatic components rotate according to a set procedure, simultaneously detecting the distance between the air inlet and the cylindrical surface. This distance information is transmitted to a computer or other terminal, generating a distance curve. Based on this curve, the diameter information and deviation of each peak and trough of the welded bellows can be obtained, and roundness information can also be determined. The curve graph can be used with the circumferential angle as the horizontal axis and the radius as the vertical axis, which intuitively reflects the radial fluctuation of the welded bellows at this height section; the roundness error can be evaluated by half the difference between the maximum radius and the minimum radius in the curve graph, or by using the least squares circle method for accurate fitting; since the internal pneumatic components and the external pneumatic components rotate synchronously and are set relative to each other, the data of the outer diameter of the peak and the inner diameter of the trough under the same circumferential angle can be obtained at the same time, and the coaxiality deviation of the inner and outer diameters can be obtained directly without secondary clamping or coordinate transformation.

[0035] Specifically, such as Figure 3 and Figure 4 As shown, the rotation power assembly 3 includes a rotation motor 31, which is fixedly installed on the lower surface of the support 2. The output end of the rotation motor 31 is located above the support 2 and a rotation drive wheel 32 is fixedly installed thereon.

[0036] The rotating motor 31 has a self-locking characteristic. When it stops running, the rotating drive wheel 32 will not rotate under the action of external force.

[0037] Specifically, such as Figure 4 and Figure 5 As shown, the internal pneumatic assembly includes an internal pneumatic rotation assembly 4, an internal pneumatic lifting assembly 5, and an internal pneumatic ranging assembly 6. A fixed bracket 23 is fixedly installed on the upper surface of the support 2.

[0038] The internal pneumatic lifting assembly 5 includes a lifting motor 51, which is fixedly mounted on a fixed bracket 23. An internal lifting screw is fixedly mounted on the output end of the lifting motor 51, and a lifting drive wheel 52 is fixedly mounted on the internal lifting screw.

[0039] The internal pneumatic rotating assembly 4 includes a driven wheel 41 and an internal pneumatic rotating cylinder 42. The internal pneumatic rotating cylinder 42 is screwed onto the internal lifting screw, and the driven wheel 41 is fixedly installed on the outer surface of the internal pneumatic rotating cylinder 42. The driven wheel 41 and the driving wheel 32 are connected by a chain drive. The internal pneumatic ranging assembly 6 is fixedly installed at the lower end of the internal pneumatic rotating cylinder 42.

[0040] The power provided by the rotating motor 31 drives the inner pneumatic drum 42 to rotate through the rotation of the driving wheel 32, the chain, and the driven wheel 41, which in turn drives the lower inner pneumatic ranging component 6 to rotate to perform ranging work for a specified stroke.

[0041] By running the lifting motor 51 and stopping the rotating motor 31, the inner pneumatic rotating cylinder 42 can be raised and lowered via the inner lifting screw, adjusting the height of the inner pneumatic ranging component 6, and measuring the troughs at different positions of the welded corrugated pipe.

[0042] Specifically, such as Figure 4 and Figure 5 As shown, an installation plate 43 is fixedly installed at the lower end of the inner pneumatic rotating cylinder 42. An adjusting electric push rod 44 is fixedly installed on both side walls of the installation plate 43, and the output end of the adjusting electric push rod 44 is rotatably equipped with an inner pneumatic ranging component 6.

[0043] The position of the internal pneumatic ranging component 6 can be adjusted laterally by adjusting the electric push rod 44. After the internal pneumatic ranging component 6 moves inward, its vertical position can be adjusted. After it moves outward to the set position, the trough can be measured.

[0044] Specifically, such as Figures 4 to 6 As shown, the external pneumatic assembly includes an external pneumatic rotation assembly 7, an external pneumatic lifting assembly 8, and an external pneumatic ranging assembly 9. The internal pneumatic ranging assembly 6 has the same structure as the external pneumatic ranging assembly 9.

[0045] The external pneumatic rotating assembly 7 includes an external pneumatic rotating cylinder 71. A sliding groove 24 is provided on the upper surface of the support 2, and the external pneumatic rotating cylinder 71 is movably assembled in the sliding groove 24. An installation rod 73 is fixedly installed at the lower end of the external pneumatic rotating cylinder 71, and the external pneumatic ranging assembly 9 is rotatably assembled on the installation rod 73.

[0046] Guide cylinders 721 are fixedly installed at both ends of the connecting rod 72. Limiting rods 722 are vertically fixedly installed on the inner wall of the guide cylinders 721. The outer walls of the inner pneumatic rotating cylinder 42 and the outer pneumatic rotating cylinder 71 are provided with slots that match the limiting rods 722.

[0047] The connecting rod 72 enables the inner pneumatic rotating drum 42 to rotate synchronously with the outer pneumatic rotating drum 71, thereby driving the outer pneumatic ranging component 9 to perform ranging work with a specified stroke.

[0048] Specifically, such as Figure 4 and Figure 5 As shown, a connecting rod 74 is fixedly installed on the outer wall of the external pneumatic rotating cylinder 71. The connecting rod 74 is an arc-shaped rod bent at 180°. A secondary connecting cylinder 75 is fixedly installed on the outer end of the connecting rod 74. The lower end of the secondary connecting cylinder 75 is equipped with a mounting rod 73 and an external pneumatic ranging assembly 9.

[0049] When the outer pneumatic rotating drum 71 rotates, it synchronously drives the auxiliary connecting drum 75 to rotate through the connecting rod 74, causing the two outer pneumatic ranging components 9 to rotate synchronously and perform measurements. The two outer pneumatic ranging components 9 are arranged opposite each other, which can balance the impact of the airflow on the welded bellows during pneumatic ranging and improve the measurement accuracy. In addition, the inner pneumatic ranging component 6 on the same side is arranged opposite to the outer pneumatic ranging component 9, which can also balance the impact of the airflow during pneumatic ranging.

[0050] Specifically, such as Figure 4 and Figure 5 As shown, the external pneumatic lifting assembly 8 includes a follower bracket 81, which is movably mounted on the support 2. A circular hole is provided on the upper surface of the follower bracket 81. An external lifting screw 83 is screwed to the inner wall of the external pneumatic rotary cylinder 71. The upper end of the external lifting screw 83 passes through the circular hole and is fixedly installed with a lifting driven wheel 82. The lifting driven wheel 82 is connected to the lifting drive wheel 52 through a chain drive.

[0051] When the lifting motor 51 is running and the rotating motor 31 is stopped, the rotation of the lifting drive wheel 52 can synchronously drive the lifting driven wheel 82 to rotate, thereby adjusting the height of the external pneumatic ranging component 9. The external lifting screw 83 has the same specifications as the internal lifting screw, ensuring that the external pneumatic ranging component 9 and the internal pneumatic ranging component 6 move the same distance in the numerical direction.

[0052] During the lifting and lowering of the inner pneumatic ranging component 6 and the outer pneumatic ranging component 9, the cooperation between the limiting rod 722 and the slot allows the inner pneumatic rotating cylinder 42 and the outer pneumatic rotating cylinder 71 to move only within the two guide cylinders 721. Under this restriction, the rotation of the outer lifting screw 83 and the inner lifting screw can drive the inner pneumatic ranging component 6 and the outer pneumatic ranging component 9 to lift and lower.

[0053] Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, a slider 811 is fixedly installed on the outer wall of the follower bracket 81, and a slide rail 22 is fixedly installed on the upper surface of the support 2, and the slider 811 is movably assembled in the slide rail 22.

[0054] The design of the slide rail 22 and the slider 811 ensures the stability of the follower bracket 81 during the rotation of the external pneumatic rotary drum 71.

[0055] Specifically, such as Figure 7 and Figure 8 As shown, the external pneumatic ranging assembly 9 includes a housing 91, a pneumatic probe 92, and a baffle plate 94. The pneumatic probe 92 is movably mounted inside the housing 91. A fine-tuning electric push rod 911 is fixedly installed on the outer wall of the housing 91, and one end of the pneumatic probe 92 is fixedly installed on the output end of the fine-tuning electric push rod 911. A rotating connector 912 is mounted on the side wall of the housing 91. An air outlet 921 is fixedly installed on the other end of the pneumatic probe 92. Rectangular rods 922 are fixedly installed on both the upper and lower surfaces of the air outlet 921, and the baffle plate 94 is movably mounted on the rectangular rods 922. A positioning rod 9 is fixedly installed on the edge of the other end of the pneumatic probe 92. 23, and a positioning buckle is fixedly installed at the end of the positioning rod 923. A threaded rod 95 is engaged in the positioning buckle. The threads at both ends of the threaded rod 95 are opposite in direction. Threaded holes are opened at corresponding positions of the two baffle plates 94. The baffle plates 94 are screwed onto the threaded rod 95 through the threaded holes. A fine-tuning driven wheel 951 is fixedly installed at the upper end of the threaded rod 95. A fine-tuning motor 93 is fixedly installed at one end of the pneumatic probe 92. A fine-tuning driving wheel 931 is fixedly installed at the output end of the fine-tuning motor 93. The fine-tuning driving wheel 931 and the fine-tuning driven wheel 951 are connected by chain drive. A laser probe 941 is fixedly installed on the surface of the baffle plate 94.

[0056] During the ranging process, the air outlet of the air outlet 921 is close to the cylindrical surface of the welded bellows, while two baffles 94 are inserted between adjacent bellows to form a small aerodynamic ranging space in conjunction with the air outlet 921. This allows the airflow to mainly act on the cylindrical surface, improving the detection accuracy and precision. At the same time, the laser probe 941 moves with the baffles 94 to between adjacent bellows, enabling more accurate and comprehensive surface detection of the inclined surface between the bellows and troughs of the welded bellows.

[0057] The fine-tuning electric push rod 911 is set to adjust the position of the pneumatic probe 92, so as to complete the action of the air outlet 921 approaching and moving away from the wave crest. When it approaches, it performs distance measurement. When it moves away, the height position of the external pneumatic distance measuring component 9 can be adjusted.

[0058] Through the transmission of the fine-tuning motor 93, the fine-tuning drive wheel 931 and the fine-tuning driven wheel 951, the threaded rod 95 can be driven to rotate, thereby adjusting the distance between the two baffles 94, which is suitable for welded bellows with different wall thicknesses; the baffles 94 have gaps between themselves and the upper and lower surfaces of the corrugations to avoid direct contact and damage during the inspection process. Because of the gaps, some airflow can perform auxiliary cleaning work on the surface of the welded bellows after passing through the gaps.

[0059] A camera unit can also be installed on the shielding plate 94. On the one hand, it can collect images or video information on the surface of the welded bellows. On the other hand, when adjusting the height of the inner pneumatic ranging component 6 and the outer pneumatic ranging component 9, it can determine the relative position of the inner pneumatic ranging component 6 and the outer pneumatic ranging component 9 with the trough and peak of the wave, so as to ensure the accuracy of the ranging position of the inner pneumatic ranging component 6 and the outer pneumatic ranging component 9.

[0060] The threaded rod 95 has an annular groove in the middle, and the size of the annular groove matches the positioning buckle. The position is limited by locking the threaded rod 95 in the positioning buckle, and the positioning buckle does not affect the rotation of the threaded rod 95.

[0061] The rotating connector 912 on the outer casing 91 works in conjunction with the output end of the adjusting electric push rod 44 and the mounting rod 73 to adjust the angle of the inner pneumatic ranging component 6 and the outer pneumatic ranging component 9, so as to match the crests and troughs of the welded bellows.

[0062] Specifically, such as Figure 7 and Figure 8 As shown, each of the two baffle plates 94 has a through hole at a corresponding position, and a guide rod 96 is inserted into the through hole. A limit block 961 is fixedly installed in the middle of the guide rod 96, and the limit block 961 is located between the two baffle plates 94.

[0063] The guide rod 96 serves to guide the baffle plate 94, and together with the rectangular rod 922 and the threaded rod 95, it ensures the stability of the baffle plate 94 and keeps the baffle plate 94 in a horizontal position relative to the air outlet 921, thus ensuring the accuracy of the detection.

[0064] The internal pneumatic ranging component 6 has the same structural composition as the external pneumatic ranging component 9.

[0065] In this embodiment, the internal pneumatic ranging component 6 and the external pneumatic ranging component 9 are set as two symmetrically distributed groups. In practical applications, this device can be adjusted to set more groups of internal pneumatic ranging components 6 and external pneumatic ranging components 9 to improve detection efficiency.

[0066] Example 2

[0067] The operation steps of the welded bellows contour detection device in Example 1 are as follows: Step 1: Preparation; Adjust the support lifting assembly 11 to the lowest position, operate the adjusting electric push rod 44 to move the inner pneumatic ranging assembly 6 to a position close to the mounting plate 43, and adjust the outer pneumatic rotating cylinder 71 to one end of the slide groove 24.

[0068] Step 2: Workpiece clamping and alignment; The welded corrugated pipe to be inspected is placed vertically on the positioning tray 12. The height of the positioning tray 12 is adjusted by the support lifting component 11 so that the upper flange of the welded corrugated pipe is aligned with the clamping component 21 on the lower surface of the support 2. The upper flange is fixed by the clamping component 21, and the positioning tray 12 assists in supporting the lower flange to ensure that the welded corrugated pipe remains vertical and coaxial.

[0069] Step 3: Adjust the lateral position of the internal pneumatic ranging component 6; The electric push rod 44 is operated to adjust the lateral position of the inner pneumatic ranging component 6, and the lifting motor 51 is operated to adjust the height position of the inner pneumatic ranging component 6, so that the air outlet 921 of the inner pneumatic ranging component 6 is close to the trough of the welded bellows and aligned with the cylindrical surface of the trough, while the air outlet 921 of the outer pneumatic ranging component 9 is aligned with the cylindrical surface of the crest.

[0070] Step 4: Radial positioning of the ranging component; The fine-tuning electric push rod 911 on the outer casing 91 is activated, pushing the pneumatic probe 92 to move towards the welded bellows, so that the air outlet 921 of the outer pneumatic ranging component 9 moves to the set ranging position on the peak cylindrical surface, and the air outlet 921 of the inner pneumatic ranging component 6 moves to the set ranging position on the trough cylindrical surface; at this time, the upper and lower baffles 94 are respectively placed on the upper and lower sides of the measured peak and the measured trough, forming a local pneumatic ranging space in cooperation with the air outlet 921. The laser probe 941 on the baffle 94 moves with the baffle 94 to the area between adjacent peaks and adjacent troughs, and is aligned with the inclined surface of the welded bellows.

[0071] Step 5, circumferential inspection; A regulated air source is introduced into the pneumatic probe 92, and the outlet head 921 outputs air stably. The gap value between the outlet head 921 and the crest cylindrical surface or trough cylindrical surface is obtained through the back pressure ranging principle. Combined with the preset radial coordinate of the outlet head 921, the outer diameter of the crest and the inner diameter of the trough at the current circumferential position are calculated. At the same time, the laser probe 941 collects images or morphological data of the inclined surface between the peaks and valleys, identifies weld damage and diaphragm defects on the inclined surface, and transmits the data measured by the pneumatic probe 92 and the laser probe 941 to a computer or other terminal. Start the rotating motor 31 to drive the inner pneumatic ranging component 6 to rotate, and drive the outer pneumatic ranging component 9 to rotate on the outside of the welded bellows. During the rotation, pneumatic ranging data and laser detection data are continuously collected and generated into a distance curve on a computer or other terminal.

[0072] Step 6: Axial layer replacement detection; After the current height detection is completed, start the fine-tuning electric push rod 911 to retract the pneumatic probe 92; start the lifting motor 51 to drive the inner pneumatic ranging component 6 and the outer pneumatic ranging component 9 to move up and down synchronously. After moving to the axial position of the next peak or trough, repeat steps four and five until all the bellows positions are detected.

[0073] When the pneumatic probe 92 is retracted, the baffle plate 94 and the welded bellows are not in the same vertical space. At this time, the vertically moving inner pneumatic ranging component 6 and outer pneumatic ranging component 9 will not come into contact or collide with the welded bellows.

[0074] Step 7: Data output and component unloading; After all wave position detections are completed, the pneumatic probe 92 is retracted, the clamping assembly 21 is released, and the welded bellows is removed. The system integrates pneumatic ranging data and laser detection data in all axial and circumferential directions, and outputs a detection report on the outer diameter of the wave crest, the inner diameter of the wave trough, roundness, coaxiality, and the distribution of damage on the inclined surface.

[0075] Example 3

[0076] The difference from Example 1 is as follows: The distribution of the internal pneumatic ranging component 6 and the external pneumatic ranging component 9 in Example 1 is as follows: Figure 9 As shown, in this embodiment, the distribution of the internal pneumatic ranging component 6 and the external pneumatic ranging component 9 is as follows: Figure 10 As shown, the internal pneumatic ranging component 6 and the external pneumatic ranging component 9 are arranged in multiple groups at a certain interval to improve detection efficiency and save detection time.

[0077] Example 4

[0078] The difference from Example 1 is as follows: By replacing the positioning tray 12 with the clamping assembly 21, the flanges at both ends of the welded bellows can be clamped and fixed during the installation of the welded bellows. Then, the welded bellows can be stretched and compressed by the support lifting assembly 11 to perform fatigue testing. By stretching the welded bellows by the support lifting assembly 11, the normally tightly packed welded bellows can be lengthened, making it easier to use the internal pneumatic ranging assembly 6 and the external pneumatic ranging assembly 9 for testing.

[0079] In this embodiment, the connection of link 72 can be eliminated, and an external lifting motor can be installed at the external pneumatic lifting assembly 8, so that the lifting actions of the internal pneumatic ranging assembly 6 and the external pneumatic ranging assembly 9 are performed separately, in order to adapt to the welded bellows in different elongation states.

[0080] The above content is only a preferred embodiment of the present invention. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of the present invention. As long as these changes do not depart from the concept of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A welding corrugated pipe contour detection device, characterized in that: The device includes a platform, an internal pneumatic assembly, and an external pneumatic assembly. A support is fixedly mounted on the upper surface of the platform via a vertical plate, and both the internal and external pneumatic assemblies are rotatably mounted on the support. A clamping assembly is mounted on the lower surface of the support. A support lifting assembly is mounted on the platform, and a positioning tray is fixedly mounted on the upper surface of the support lifting assembly. The clamping assembly cooperates with the positioning tray to clamp and fix a welded corrugated pipe. The internal and external pneumatic assemblies are used to measure the inner diameter, outer diameter, and roundness of the welded corrugated pipe, respectively. A rotational power assembly is mounted on the support, and the output end of the rotational power assembly drives the internal pneumatic assembly to rotate. A connecting rod is mounted between the internal and external pneumatic assemblies.

2. The welded corrugated pipe contour detection device according to claim 1, characterized in that: The rotational power assembly includes a rotational motor, which is fixedly mounted on the lower surface of the support. The output end of the rotational motor is located above the support and is fixedly mounted with a rotational drive wheel.

3. The welded corrugated pipe contour detection device according to claim 2, characterized in that: The internal pneumatic assembly includes an internal pneumatic rotation assembly, an internal pneumatic lifting assembly, and an internal pneumatic ranging assembly, and a fixed bracket is fixedly installed on the upper surface of the support. The internal pneumatic lifting assembly includes a lifting motor, which is fixedly mounted on a fixed bracket. An internal lifting screw is fixedly mounted on the output end of the lifting motor, and a lifting drive wheel is fixedly mounted on the internal lifting screw. The internal pneumatic rotating assembly includes a driven wheel and an internal pneumatic rotating cylinder. The internal pneumatic rotating cylinder is screwed onto an internal lifting screw, and the driven wheel is fixedly installed on the outer surface of the internal pneumatic rotating cylinder. The driven wheel and the driving wheel are connected by a chain drive. The internal pneumatic ranging assembly is fixedly installed at the lower end of the internal pneumatic rotating cylinder.

4. The welded corrugated pipe contour detection device according to claim 3, characterized in that: An installation plate is fixedly installed at the lower end of the inner pneumatic rotary drum. An adjusting electric push rod is fixedly installed on both side walls of the installation plate, and the output end of the adjusting electric push rod is rotatably equipped with an inner pneumatic ranging component.

5. The welded corrugated pipe contour detection device according to claim 3, characterized in that: The external pneumatic assembly includes an external pneumatic rotation assembly, an external pneumatic lifting assembly, and an external pneumatic ranging assembly. The internal pneumatic ranging assembly has the same structure as the external pneumatic ranging assembly. The external pneumatic rotating assembly includes an external pneumatic rotating cylinder. A sliding groove is provided on the upper surface of the support, and the external pneumatic rotating cylinder is movably assembled in the sliding groove. An installation rod is fixedly installed at the lower end of the external pneumatic rotating cylinder, and the external pneumatic ranging assembly is rotatably assembled on the installation rod. Guide cylinders are fixedly installed at both ends of the connecting rod, and limit rods are vertically fixedly installed on the inner walls of the guide cylinders. The outer walls of the inner pneumatic rotating cylinder and the outer pneumatic rotating cylinder are provided with slots that match the limit rods.

6. The welded corrugated pipe contour detection device according to claim 5, characterized in that: A connecting rod is fixedly installed on the outer wall of the external pneumatic rotating cylinder. The connecting rod is an arc-shaped rod bent at 180°. A secondary connecting cylinder is fixedly installed on the outer end of the connecting rod. The lower end of the secondary connecting cylinder is equipped with an installation rod and an external pneumatic ranging assembly.

7. The welded corrugated pipe contour detection device according to claim 5, characterized in that: The external pneumatic lifting assembly includes a follower bracket, which is movably mounted on a support. The upper surface of the follower bracket has a circular hole. An external lifting screw is screwed to the inner wall of the external pneumatic rotary cylinder. The upper end of the external lifting screw passes through the circular hole and is fixedly installed with a lifting driven wheel. The lifting driven wheel and the lifting driving wheel are connected by a chain drive.

8. The welded corrugated pipe contour detection device according to claim 7, characterized in that: The outer wall of the follower bracket is fixedly equipped with a slider, and the upper surface of the support is fixedly equipped with a slide rail, and the slider is moved and assembled in the slide rail.

9. The welded corrugated pipe contour detection device according to claim 5, characterized in that: The external pneumatic ranging assembly includes a housing, a pneumatic probe, and a baffle plate. The pneumatic probe is movably mounted within the housing. A fine-tuning electric push rod is fixedly installed on the outer wall of the housing, and one end of the pneumatic probe is fixedly installed at the output end of the fine-tuning electric push rod. A rotating connector is mounted on the side wall of the housing. An air outlet is fixedly installed at the other end of the pneumatic probe. Rectangular rods are fixedly installed on both the upper and lower surfaces of the air outlet, and the baffle plate is movably mounted on the rectangular rods. A positioning rod is fixedly installed on the edge of the other end of the pneumatic probe. A positioning buckle is fixedly installed at the end of the rod, and a threaded rod is engaged in the positioning buckle. The threads at both ends of the threaded rod have opposite directions. Threaded holes are opened at corresponding positions of the two shielding plates, and the shielding plates are screwed onto the threaded rod through the threaded holes. A fine-tuning driven wheel is fixedly installed at the upper end of the threaded rod. A fine-tuning motor is fixedly installed at one end of the pneumatic probe. A fine-tuning driving wheel is fixedly installed at the output end of the fine-tuning motor, and the fine-tuning driving wheel and the fine-tuning driven wheel are connected by chain drive. A laser probe is fixedly installed on the surface of the shielding plate.

10. The welded corrugated pipe contour detection device according to claim 9, characterized in that: Each of the two shielding plates has a through hole at a corresponding position, and a guide rod is inserted into the through hole. A limit block is fixedly installed in the middle of the guide rod, and the limit block is located between the two shielding plates.

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