Detection device for metal bellows

Abstract

The invention discloses a detection device for a metal corrugated pipe, and relates to the technical field of corrugated pipe detection, the device comprises a base, the left side and the right side of the upper end of the base are respectively and symmetrically fixed with a fixed plate I and a fixed plate II, and the upper ends of the fixed plate I and the fixed plate II are provided with surface detection structures for detecting the outer surface of a pipe fitting. According to the internal supporting structure, through a linkage mechanism of the internal supporting lead screw and the gear, stable fixation of the interior of the pipe fitting and synchronous rotation during detection are achieved; meanwhile, the surface detection structure utilizes a reciprocating screw rod to drive a detection piece to do linear reciprocating motion, and the outer surface of the pipe fitting is comprehensively scanned; therefore, the stability of the pipe fitting in the detection process is ensured, errors caused by shaking or displacement are avoided, and the detection precision is remarkably improved; omnibearing detection capability ensures that tiny defects on the surface of the pipe fitting are accurately found, and detection quality and reliability are further improved.

Description

Technical Field

[0001] This invention relates to the field of corrugated pipe testing technology, specifically a testing device for metal corrugated pipes. Background Technology

[0002] Ensuring structural integrity and sealing performance is crucial during the production and quality inspection of metal bellows.

[0003] Metal bellows, as an important pipe connection component, are widely used in various industrial fields, such as oil, natural gas, and chemical industries. Their quality directly affects the safety and operational efficiency of the entire system. Therefore, comprehensive and accurate testing of metal bellows is particularly important.

[0004] However, existing metal bellows testing devices have many drawbacks in practical applications. First, traditional testing devices often struggle to provide stable internal support for the metal bellows, causing it to wobble or shift during testing, thus affecting the accuracy of the test results.

[0005] This instability not only reduces the accuracy of testing, but may also miss minute defects on the surface of pipe fittings, posing a potential threat to product quality.

[0006] Secondly, existing testing devices typically use fixed paths or manual operation when inspecting the outer surface of metal corrugated pipes, making it difficult to achieve a comprehensive and efficient scan of the pipe's outer surface.

[0007] This method is not only inefficient, but also prone to inconsistencies in test results due to human factors, which further affects the quality and reliability of the test.

[0008] Based on this, a testing device for metal bellows is now provided, which can eliminate the drawbacks of existing devices, such as insufficient stability of pipe fittings and insufficient axial detection coverage of bellows during the testing process. Summary of the Invention

[0009] The purpose of this invention is to provide a detection device for metal bellows, so as to solve the problems of insufficient pipe stability and insufficient axial detection coverage of bellows in the existing devices in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: A testing device for metal corrugated pipes includes a base, on which a fixing plate one and a fixing plate two are symmetrically fixed on the left and right sides of the upper end of the base, and the upper ends of the fixing plate one and the fixing plate two are provided with surface testing structures for testing the outer surface of the pipe fittings. A movable plate is slidably disposed on the upper end of the base. The movable plate is located between a fixed plate and a fixed plate. Sealing rubber blocks are rotatably installed on opposite ends of the movable plate and the fixed plate. A central groove is opened in the middle of each of the two sealing rubber blocks. A central opening is opened through the middle of the central groove. An internal support structure for fixing the pipe is provided inside the central groove. A transmission structure for connecting the surface detection structure and the internal support structure is provided on opposite ends of the movable plate and the fixed plate. The base has a movable groove in the middle of its upper end, and the movable groove is provided with an adjustment structure to adjust the relative distance between the movable plate and the fixed plate.

[0011] Preferably, the surface detection structure includes a reciprocating lead screw rotatably mounted between a first fixed plate and a second fixed plate. One end of the reciprocating lead screw extends to the end of the first fixed plate away from the second fixed plate and is fixedly connected to the output end of a second motor mounted on the first fixed plate. A guide rod is fixed between the first fixed plate and the second fixed plate. The guide rod is arranged parallel to the reciprocating lead screw. The outer wall of the guide rod is slidably connected to a reciprocating block. The reciprocating block is connected to the threaded groove on the outer wall of the reciprocating lead screw through its internal pin structure. A detection element is installed at the lower end of the reciprocating block. The other end of the reciprocating lead screw is fixed to the end of the second fixed plate away from the first fixed plate and is connected to a transmission structure.

[0012] Preferably, the transmission structure includes two gears 1 that are rotatably mounted on opposite ends of a fixed plate 2 and a movable plate, respectively. The gears 1 are connected to an inner support structure. A transmission wheel 2 is fixed in the middle of the gears 1 at the fixed plate 2. The transmission wheel 2 is connected to the transmission wheel 1 via a transmission belt. The transmission wheel 1 is fixedly connected to the other end of a reciprocating lead screw.

[0013] Preferably, gear one meshes with gear two, gear two has a spline opening through its middle, the inner wall of the spline opening is slidably connected to the outer wall of the spline rod, one end of the spline rod is rotatably connected to fixed plate one, and fixed plate two and movable plate have through openings through the spline opening, the inner diameter of the through opening is larger than the maximum outer diameter of the spline rod.

[0014] Preferably, the internal support structure includes an internal support screw fixed coaxially with the gear. The two internal support screws are rotatably connected to the fixed plate and the movable plate, respectively. One end of the internal support screw extends through the central opening into the interior of the central groove. The internal support screw is threadedly connected to the active block inside the central groove. Limiting openings are symmetrically opened on both sides of the active block. Limiting plates are symmetrically fixed on both sides of the inner wall of the central groove. The outer wall of the central opening is slidably connected to the inner wall of the limiting opening. The end of the internal support screw away from the gear is fixed with a limiting block. The outer walls of the active block and the limiting block are provided with a plurality of internal support members for supporting the inner wall of the pipe.

[0015] Preferably, the inner support includes a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to a limiting block, and the other end of the first connecting rod is rotatably connected to one end of the inner support block. One end of the second connecting rod is rotatably connected to a center opening, and a slider is rotatably mounted on the other end of the second connecting rod. A slot is opened on the other end of the inner support block, and the slider is slidably mounted inside the slot.

[0016] Preferably, a pressure port is provided through the middle of one of the inner support screws, and the pressure port is connected to an external pressure member.

[0017] Preferably, the outer wall of the inner support block is provided with a soft pad.

[0018] Preferably, the adjustment structure includes a motor installed at one end of the base, the motor extending into the moving groove and fixedly connected to an adjusting screw, the adjusting screw being threadedly connected to a moving block, the moving block being fixedly installed at the lower end of the moving plate, the adjusting screw being rotatably installed inside the moving groove, and the moving block being slidably installed inside the moving groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The internal support structure of this invention achieves stable fixation inside the pipe fitting and synchronous rotation during inspection through the linkage mechanism of the internal support screw and gear; at the same time, the surface inspection structure uses a reciprocating screw to drive the inspection piece to perform linear reciprocating motion, performing a comprehensive scan of the outer surface of the pipe fitting; this ensures the stability of the pipe fitting during the inspection process, avoids errors caused by shaking or displacement, and significantly improves the inspection accuracy; the all-round inspection capability ensures the accurate detection of minor defects on the surface of the pipe fitting, further improving the inspection quality and reliability.

[0020] 2. The present invention has a pressure port that runs through the middle of an internal support screw and is connected to an external pressure device. Gas is injected into the metal bellows through the pressure port by the external pressure device, thereby performing a sealing test on the pipe fitting. It can directly and effectively evaluate the sealing performance of the metal bellows, ensuring that the pipe fitting will not leak in actual application, and further improving the functional integrity of the testing device and the accuracy of the test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure at the lower end of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the fixed plate and the movable plate of the present invention.

[0024] Figure 4 This is a schematic diagram of the internal support structure of the present invention.

[0025] Figure reference numerals: 1. Base; 11. Moving slot; 2. Adjusting structure; 21. Motor 1; 22. Adjusting screw; 23. Moving block; 31. Fixing plate 1; 32. Fixing plate 2; 33. Moving plate; 34. Through-hole; 35. Sealing rubber block; 351. Center slot; 352. Center opening; 353. Limiting plate; 4. Surface detection structure; 41. Motor 2; 42. Reciprocating screw; 43. 44. Guide rod; 45. Reciprocating block; 56. Detector; 57. Transmission wheel one; 58. Transmission belt; 59. Transmission wheel two; 50. Gear one; 51. Gear two; 52. Spline opening; 53. Spline rod; 64. Internal support structure; 61. Internal support screw; 62. Limiting block; 63. Driving block; 64. Limiting port; 65. Connecting rod one; 66. Connecting rod two; 67. Internal support block; 68. Groove; 7. Pressurization port. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] The core technical concept of this invention lies in the coordinated operation of the internal support structure and the surface detection structure, which achieves stable fixation inside the pipe fitting and synchronous rotation during detection. Simultaneously, a reciprocating screw drives the detection component in linear reciprocating motion, performing a comprehensive scan of the pipe fitting's outer surface. This not only ensures the stability of the pipe fitting during detection, avoiding errors caused by shaking or displacement and significantly improving detection accuracy, but also ensures the accurate detection of minute surface defects through its omnidirectional detection capability, further enhancing detection quality and reliability. Furthermore, the device integrates a sealing detection function, injecting gas into the pipe fitting through an external pressure device for sealing testing, further improving the functional completeness of the detection device and the accuracy of the detection results.

[0028] In one embodiment, such as Figures 1-4 As shown, a metal corrugated pipe testing device includes a base 1. Fixing plate 31 and fixing plate 32 are symmetrically fixed on the left and right sides of the upper end of the base 1, respectively. The upper ends of fixing plate 31 and fixing plate 32 are provided with surface testing structure 4 for testing the outer surface of the pipe. A movable plate 33 is slidably disposed on the upper end of the base 1. The movable plate 33 is located between the fixed plate 1 31 and the fixed plate 2 32. Sealing rubber blocks 35 are rotatably installed on opposite ends of the movable plate 33 and the fixed plate 2 32. A central groove 351 is opened in the middle of the two sealing rubber blocks 35. A central opening 352 is opened through the middle of the central groove 351. An internal support structure 6 for fixing the pipe is provided inside the central groove 351. A transmission structure for connecting the surface detection structure 4 and the internal support structure 6 is provided on opposite ends of the movable plate 33 and the fixed plate 2 32. The base 1 has a movable groove 11 at the middle of its upper end, and the movable groove 11 is provided with an adjustment structure 2 for adjusting the relative distance between the movable plate 33 and the fixed plate 32.

[0029] In this embodiment, firstly, the relative distance between the moving plate 33 and the fixed plate 32 is adjusted in the moving groove 11 using the adjusting structure 2, so that the two ends of the metal bellows are respectively fitted into the center grooves 351 of the two sealing rubber blocks 35, thus completing the initial positioning.

[0030] The internal support structure 6, located inside the central groove 351, expands outward under the drive of relevant power to internally support and fix the inside of the metal bellows, ensuring that the pipe is stable and does not shake or shift during testing.

[0031] The surface inspection structure 4, fixed to the upper ends of the fixing plate 31 and the fixing plate 32, performs a comprehensive inspection of the outer surface of the metal bellows during inspection to check for defects such as scratches, cracks, and deformation.

[0032] If a comprehensive inspection of the outer surface is required during the inspection process, the sealing rubber block 35 installed at the opposite ends of the moving plate 33 and the fixed plate 32 is rotated to drive the metal bellows to rotate, so that the surface inspection structure 4 can perform a comprehensive inspection of the entire outer surface of the pipe fitting.

[0033] In an optional embodiment, the surface detection structure 4 includes a reciprocating screw 42 rotatably mounted between a first fixed plate 31 and a second fixed plate 32. One end of the reciprocating screw 42 extends to the end of the first fixed plate 31 away from the second fixed plate 32 and is fixedly connected to the output end of a second motor 41 mounted on the first fixed plate 31. A guide rod 43 is fixed between the first fixed plate 31 and the second fixed plate 32. The guide rod 43 is arranged parallel to the reciprocating screw 42. The outer wall of the guide rod 43 is slidably connected to a reciprocating block 44. The reciprocating block 44 is connected to the threaded groove on the outer wall of the reciprocating screw 42 through its internal pin structure. A detection element 45 is installed at the lower end of the reciprocating block 44. The other end of the reciprocating screw 42 is fixed to the end of the second fixed plate 32 away from the first fixed plate 31 and is connected to a transmission structure.

[0034] It should be noted that when the motor 41 in the surface detection structure 4 starts, it outputs power to drive the reciprocating screw 42 to rotate smoothly between the fixed plate 31 and the fixed plate 32. The reciprocating block 44 is precisely connected to the threaded groove on the outer wall of the reciprocating screw 42 through its internal pin structure. At the same time, due to the guiding and restricting effect of the guide rod 43, the reciprocating block 44 can only make reciprocating linear motion along the reciprocating screw 42.

[0035] The detection component 45, installed at the lower end of the reciprocating block 44, moves together with the reciprocating block 44 to perform a preliminary linear reciprocating full-scale scan inspection of the outer surface of the metal bellows. This inspection method can quickly cover most of the outer surface of the pipe fitting, and preliminarily check whether there are obvious defects such as scratches, cracks, and deformations, providing direction for subsequent more detailed inspections.

[0036] In an optional embodiment, the transmission structure includes two gears 54 rotatably mounted on opposite ends of a fixed plate 32 and a movable plate 33, respectively. The gears 54 are connected to the inner support structure 6. A transmission wheel 53 is fixed in the middle of the gears 54 at the fixed plate 32. The transmission wheel 53 is connected to the transmission wheel 51 via a transmission belt 52. The transmission wheel 51 is fixedly connected to the other end of the reciprocating lead screw 42.

[0037] It should be noted that when the reciprocating screw 42 rotates, the transmission wheel 51 fixed at one end of it rotates synchronously. The transmission wheel 51 is connected to the transmission wheel 53 fixed in the middle of the gear 54 at the fixed plate 32 via the transmission belt 52, so that the power is transmitted from the reciprocating screw 42 to the transmission wheel 53.

[0038] The transmission wheel 53 drives the fixed gear 54 to rotate. Since the moving plate 33 and the fixed plate 33 are also rotatably mounted with gears 54 on opposite ends, and these gears 54 are connected to the inner support structure 6, the two gears 54 rotate simultaneously and transmit power to the inner support structure 6.

[0039] After receiving the power transmitted by gear 54, the internal support structure 6 expands or contracts according to the design requirements to achieve precise fixation or release of the inside of the metal bellows, ensuring that the internal fixation and surface detection actions are coordinated.

[0040] In an optional embodiment, gear 1 54 meshes with gear 2 55, and a spline opening 56 is provided through the middle of gear 2 55. The inner wall of the spline opening 56 is slidably connected to the outer wall of spline rod 57. One end of spline rod 57 is rotatably connected to fixed plate 1 31. Fixed plate 2 32 and movable plate 33 are provided with through openings 34 through the spline opening 56. The inner diameter of through opening 34 is larger than the maximum outer diameter of spline rod 57.

[0041] It should be noted that gear 54 is rotatably mounted on opposite ends of fixed plate 32 and movable plate 33, respectively. As an intermediate link in power transmission, it receives power by connecting with transmission wheel 53 and transmits power by meshing with gear 55, thereby realizing the transmission and conversion of power between different components.

[0042] Gear 2 55: meshes with Gear 1 54, receives the power transmitted by Gear 1 54 and further transmits it to the inner support structure 6. The central spline opening 56 cooperates with the spline rod 57 to ensure its own rotational stability.

[0043] Spline opening 56: Located in the middle of gear 2 55, it is slidably connected to the outer wall of spline rod 57, serving to guide and restrict the radial movement of gear 2 55, ensuring the stable rotation of gear 2 55 during power transmission.

[0044] Spline rod 57: One end is rotatably connected to fixed plate 31, and the other end is engaged with gear 55 through spline opening 56, providing rotational support and guidance for gear 55, ensuring the stability and accuracy of the transmission system.

[0045] Through-hole 34: It is opened at the spline opening 56 between the fixed plate 32 and the movable plate 33. Its inner diameter is larger than the maximum outer diameter of the spline rod 57, so that the spline rod 57 can pass through smoothly when the movable plate 33 moves, without affecting the position adjustment of the movable plate 33 and the rotation of the spline rod 57.

[0046] In an optional embodiment, the inner support structure 6 includes an inner support screw 61 coaxially fixed with gear 54. The two inner support screws 61 are rotatably connected to the fixed plate 32 and the movable plate 33, respectively. One end of the inner support screw 61 extends through the central opening 352 into the interior of the central groove 351. The inner support screw 61 is threadedly connected to the active block 63 inside the central groove 351. Limiting openings 64 are symmetrically opened on both sides of the active block 63. Limiting plates 353 are symmetrically fixed on both sides of the inner wall of the central groove 351. The outer wall of the central opening 352 is slidably connected to the inner wall of the limiting opening 64. The end of the inner support screw 61 away from gear 54 is fixed with a limiting block 62. The outer walls of the active block 63 and the limiting block 62 are provided with a plurality of inner support members for supporting the inner wall of the pipe.

[0047] It should be noted that when the inner support screw 61 rotates inside the central groove 351, the drive block 63, which is threadedly connected to it, is subjected to thread force. Simultaneously, the limiting ports 64 on both sides of the drive block 63 are slidably connected to the limiting plates 353 symmetrically fixed on both sides of the inner wall of the central groove 351, restricting the rotational freedom of the drive block 63, so that the drive block 63 can only move linearly along the axial direction of the inner support screw 61. As the inner support screw 61 rotates, the drive block 63 moves away from the gear 54.

[0048] The active block 63 and the inner support screw 61 are fixed at one end away from the gear 54. The outer wall of the limiting block 62 is provided with several inner support members for supporting the inner wall of the pipe. When the active block 63 moves, it pushes the inner support members to expand outward until the inner support members are tightly attached to the inner wall of the metal bellows, thus stabilizing the pipe from the inside and preventing it from shaking or shifting due to external forces or its own factors during testing, ensuring accurate and reliable test results.

[0049] In an optional embodiment, the inner support member includes a first connecting rod 65 and a second connecting rod 66. One end of the first connecting rod 65 is rotatably connected to the limiting block 62, and the other end of the first connecting rod 65 is rotatably connected to one end of the inner support block 67. One end of the second connecting rod 66 is rotatably connected to the center opening 352, and a slider is rotatably mounted on the other end of the second connecting rod 66. The other end of the inner support block 67 has a slot 671, and the slider is slidably mounted inside the slot 671.

[0050] It should be noted that one end of the connecting rod 65 is rotatably connected to the limiting block 62, and the other end is rotatably connected to one end of the inner support block 67. When the driving block 63 moves, the end of the connecting rod 65 connected to the inner support block 67 swings outward under the push of the driving block 63.

[0051] One end of connecting rod 66 is rotatably connected to the center opening 352, and the other end is rotatably mounted with a slider. The other end of the inner support block 67 has a slot 671, and the slider is slidably installed inside the slot 671. When connecting rod 65 pushes the inner support block 67, connecting rod 66 provides support and guidance. As the inner support block 67 moves, the slider slides within the slot 671, causing the inner support block 67 to expand smoothly outward. Multiple inner support blocks 67 expand outward simultaneously until they tightly fit against the inner wall of the metal bellows, providing stable support from the inside and preventing displacement or shaking due to external forces or their own internal factors during testing, thus ensuring accurate and reliable test results.

[0052] In an optional embodiment, a pressure port 7 is provided through the middle of one of the inner support screws 61, and the pressure port 7 is connected to an external pressure member.

[0053] It should be noted that when the pipe fitting is accurately fitted onto the sealing rubber block 35, the pressure-injecting component injects gas into the pipe fitting through the pressure-injecting port 7 to perform a pipe fitting sealing test.

[0054] In an optional embodiment, the outer wall of the inner support block 67 is provided with a pad.

[0055] It should be noted that when the inner support block 67 is subjected to force, the soft pad can undergo a certain degree of elastic deformation, which disperses the concentrated force, reduces the phenomenon of local stress concentration, and prevents the inner support block 67 itself or the inner wall of the pipe fittings in contact with it from cracking, breaking or other failure modes due to excessive stress.

[0056] In an optional embodiment, the adjustment structure 2 includes a motor 21 mounted on one end of the base 1. The motor 21 extends into the moving groove 11 and is fixedly connected to an adjustment screw 22. The adjustment screw 22 is threadedly connected to a moving block 23. The moving block 23 is fixedly mounted on the lower end of the moving plate 33. The adjustment screw 22 is rotatably mounted inside the moving groove 11, and the moving block 23 is slidably mounted inside the moving groove 11.

[0057] It should be noted that when motor 21 starts, its output shaft drives the adjusting screw 22 to rotate inside the moving slot 11. Since the adjusting screw 22 and the moving block 23 are threadedly connected, according to the characteristics of threaded transmission, the rotation of the adjusting screw 22 is converted into the linear motion of the moving block 23. The moving block 23 is fixedly installed at the lower end of the moving plate 33, so the linear motion of the moving block 23 will drive the moving plate 33 to move synchronously, thereby adapting to pipe fittings of different lengths.

[0058] The above embodiment discloses a detection device for metal bellows. First, based on the length of the metal bellows, the motor 21 in the adjustment structure 2 is activated. The output shaft of the motor 21 drives the adjusting screw 22 to rotate inside the moving groove 11. Since the adjusting screw 22 is threadedly connected to the moving block 23 fixedly installed at the lower end of the moving plate 33, according to the thread transmission characteristics, the rotation of the adjusting screw 22 is converted into linear motion of the moving block 23, thereby driving the moving plate 33 to move on the base 1, adjusting the relative distance between the moving plate 33 and the fixed plate 32 to match the length of the metal bellows to be detected. Then, both ends of the metal bellows are respectively fitted into the central grooves 351 of the two sealing rubber blocks 35, completing the initial positioning.

[0059] When the motor 41 in the surface inspection structure 4 starts, it drives the reciprocating screw 42 to rotate smoothly between the fixed plate 31 and the fixed plate 32. The transmission wheel 51, which is fixed at one end of the reciprocating screw 42, rotates synchronously. It is connected to the transmission wheel 53, which is fixed in the middle of the gear 54 on the fixed plate 32, through the transmission belt 52, thus transmitting power to the transmission wheel 53. The transmission wheel 53 drives the gear 54, which is fixed to it, to rotate. At the same time, the gear 54, which is rotatably mounted on the opposite ends of the moving plate 33 and the fixed plate 32, also rotates synchronously.

[0060] Gear 1 54 meshes with Gear 2 55, transmitting power to Gear 2 55. The spline opening 56 in the middle of Gear 2 55 is slidably connected to the outer wall of spline rod 57. One end of spline rod 57 is rotatably connected to fixed plate 1 31, providing rotational support and guidance for Gear 2 55 and ensuring stable rotation of Gear 2 55.

[0061] The inner support screw 61, coaxially fixed with gear 54, rotates inside the central groove 351. The driving block 63, threadedly connected to it, is restricted in its rotational freedom by sliding connections between the limiting ports 64 on both sides and the limiting plates 353 symmetrically fixed on both sides of the inner wall of the central groove 351. It can only move linearly along the axial direction of the inner support screw 61. As the inner support screw 61 rotates, the driving block 63 moves away from gear 54.

[0062] Several internal support components are provided on the outer wall of the limiting block 62, which is fixed to the end of the active block 63 and the inner support screw 61 away from the gear 54. One end of the connecting rod 65 is rotatably connected to the limiting block 62, and the other end is rotatably connected to one end of the inner support block 67. Under the push of the active block 63, the end of the connecting rod 65 connected to the inner support block 67 swings outward. One end of the connecting rod 66 is rotatably connected to the center opening 352, and the slider mounted on the other end slides in the slot 671 opened at the other end of the inner support block 67, which plays a supporting and guiding role, so that the inner support block 67 expands outward smoothly until it fits tightly against the inner wall of the metal bellows, thus stabilizing the pipe from the inside and preventing shaking and displacement during testing.

[0063] In the surface inspection structure 4, motor 41 drives the reciprocating screw 42 to rotate. The reciprocating block 44 is precisely connected to the threaded groove on the outer wall of the reciprocating screw 42 through an internal pin structure. Simultaneously, guided and restricted by the guide rod 43, it can only move in a reciprocating linear motion along the reciprocating screw 42. The inspection piece 45, installed at the lower end of the reciprocating block 44, moves together with the reciprocating block 44, performing a preliminary linear reciprocating comprehensive scan inspection of the outer surface of the metal bellows. This quickly covers most of the outer surface of the pipe fitting, initially checking for obvious defects such as scratches, cracks, and deformation.

[0064] If a comprehensive inspection of the outer surface is required, since the pipe fitting is firmly fixed by the inner support structure 6, the rotation of the inner support screw 61 will cause the pipe fitting to rotate around its own axis. At the same time, the sealing rubber block 35 is in close contact with the outer surface of the pipe fitting. Under the frictional force of the rotating pipe fitting, the sealing rubber block 35 also rotates around the same axis, thereby achieving synchronous rotation of the inner support structure 6, the pipe fitting, and the sealing rubber block 35, so that the surface inspection structure 4 can perform a comprehensive inspection of the outer surface of the pipe fitting.

[0065] If a sealing test is required, a pressure port 7, which is opened through the middle of an internal support screw 61, is connected to an external pressure device. The pressure device injects gas into the pipe through the pressure port 7 to test the sealing performance of the pipe.

[0066] Any aspects of this invention not described in detail are well-known to those skilled in the art.

[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A detection device for metal bellows, characterized in that, Includes a base (1), on the left and right sides of the upper end of the base (1) are fixed plates one (31) and two (32) respectively, and the upper ends of the fixed plates one (31) and two (32) are provided with surface inspection structures (4) for inspecting the outer surface of the pipe fittings. A movable plate (33) is slidably provided on the upper end of the base (1). The movable plate (33) is located between the first fixed plate (31) and the second fixed plate (32). Sealing rubber blocks (35) are rotatably installed on opposite ends of the movable plate (33) and the second fixed plate (32). A central groove (351) is provided in the middle of the two sealing rubber blocks (35). A central opening (352) is provided through the middle of the central groove (351). An internal support structure (6) for fixing the pipe is provided inside the central groove (351). A transmission structure for connecting the surface detection structure (4) and the internal support structure (6) is provided on opposite ends of the movable plate (33) and the second fixed plate (32). The base (1) has a movable groove (11) in the middle of its upper end. The movable groove (11) is provided with an adjustment structure (2) for adjusting the relative distance between the movable plate (33) and the fixed plate (32).

2. The detection device for a metal bellows according to claim 1, characterized in that, The surface detection structure (4) includes a reciprocating screw (42) rotatably mounted between a first fixed plate (31) and a second fixed plate (32). One end of the reciprocating screw (42) extends to the first fixed plate (31) away from the second fixed plate (32) and is fixedly connected to the output end of a second motor (41) mounted on the first fixed plate (31). A guide rod (43) is fixed between the first fixed plate (31) and the second fixed plate (32). The guide rod (43) is parallel to the reciprocating screw (42). The outer wall of the guide rod (43) is slidably connected to a reciprocating block (44). The reciprocating block (44) is connected to the threaded groove on the outer wall of the reciprocating screw (42) through its internal pin structure. A detection element (45) is installed at the lower end of the reciprocating block (44). The other end of the reciprocating screw (42) is fixed to the second fixed plate (32) away from the first fixed plate (31) and connected to the transmission structure.

3. The detection device for a metal bellows according to claim 2, characterized in that, The transmission structure includes two gears (54) that are rotatably mounted on opposite ends of a fixed plate (32) and a movable plate (33), respectively. The gears (54) are connected to the inner support structure (6). A transmission wheel (53) is fixed in the middle of the gears (54) at the fixed plate (32). The transmission wheel (53) is connected to the transmission wheel (51) via a transmission belt (52). The transmission wheel (51) is fixedly connected to the other end of a reciprocating screw (42).

4. The detection device for a metal bellows according to claim 3, characterized in that, The gear one (54) meshes with the gear two (55). The gear two (55) has a spline opening (56) through its middle. The inner wall of the spline opening (56) is slidably connected to the outer wall of the spline rod (57). One end of the spline rod (57) is rotatably connected to the fixed plate one (31). The fixed plate two (32) and the moving plate (33) have a through opening (34) through the spline opening (56). The inner diameter of the through opening (34) is larger than the maximum outer diameter of the spline rod (57).

5. The detection device for a metal bellows according to claim 3, characterized in that, The internal support structure (6) includes an internal support screw (61) coaxially fixed with gear one (54). The two internal support screws (61) are rotatably connected to the fixed plate two (32) and the moving plate (33) respectively. One end of the internal support screw (61) extends through the central opening (352) into the interior of the central groove (351). The internal support screw (61) is threadedly connected to the active block (63) inside the central groove (351). The active block (63) has symmetrically opened limit openings (64) on both sides. The inner wall of the central groove (351) is symmetrically fixed with limit plates (353). The outer wall of the central opening (352) is slidably connected to the inner wall of the limit opening (64). The end of the internal support screw (61) away from gear one (54) is fixed with a limit block (62). The outer walls of the active block (63) and the limit block (62) are provided with a number of internal support components for supporting the inner wall of the pipe.

6. The detection device for a metal bellows according to claim 5, characterized in that, The inner support includes a first connecting rod (65) and a second connecting rod (66). One end of the first connecting rod (65) is rotatably connected to a limiting block (62), and the other end of the first connecting rod (65) is rotatably connected to one end of an inner support block (67). One end of the second connecting rod (66) is rotatably connected to a center opening (352), and a slider is rotatably installed on the other end of the second connecting rod (66). The other end of the inner support block (67) has a slot (671), and the slider is slidably installed inside the slot (671).

7. The detection device for a metal bellows according to claim 5, characterized in that, A pressure port (7) is provided through the middle of one of the inner support screws (61), and the pressure port (7) is connected to an external pressure member.

8. The detection device for a metal bellows according to claim 7, characterized in that, The outer wall of the inner support block (67) is provided with a soft pad.

9. The detection device for a metal bellows according to claim 1, characterized in that, The adjustment structure (2) includes a motor (21) installed at one end of the base (1). The motor (21) extends into the moving groove (11) and is fixedly connected to an adjustment screw (22). The adjustment screw (22) is threadedly connected to a moving block (23). The moving block (23) is fixedly installed at the lower end of the moving plate (33). The adjustment screw (22) is rotatably installed inside the moving groove (11). The moving block (23) is slidably installed inside the moving groove (11).

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