A multi-size corrugated pipe welding platform

Abstract

This invention relates to the field of metal corrugated pipe manufacturing and testing technology, specifically to a multi-size corrugated pipe welding platform. The platform includes a base, a vertical mounting mechanism mounted on the base, and a detection mechanism and an adjustment mechanism mounted on the vertical mounting mechanism. When welding QD-type metal corrugated pipe bodies, a central support mechanism can be used to convert the axis of the elastic metal corrugated pipe body into the axis of the central support mechanism. Specifically, after the detection mechanism detects the axis of the central support mechanism and transmits it to the control center, the control center automatically controls the adjustment mechanism to adjust the upper and lower flanges at the top and bottom of the metal corrugated pipe body to ensure coaxiality and welding effectiveness. Simultaneously, the central support mechanism can extend outwards along the radial direction of the metal corrugated pipe body to abut against the inner wall of the metal corrugated pipe body, accommodating metal corrugated pipe bodies with different inner diameters.

Description

Technical Field

[0001] This invention relates to the field of metal bellows manufacturing technology, and in particular to a multi-size bellows welding platform. Background Technology

[0002] A metal bellows assembly includes a metal bellows body and connecting flanges welded to the upper and lower end faces. There are five basic structural types for the end connections of the bellows body: the first type is an internal fit, represented by N; the second type is an external fit, represented by W; the third type is a closed bottom, represented by D; and the fourth type has no straight wall section and is cut off at the crest, represented by QD (see [reference]). Figure 1 (As shown); the fifth type, without a straight wall section and cut at the trough, is represented by Qd. The end structures of the bellows can be arbitrarily combined from the above five structures. Generally, for the welding of bellows with straight wall sections with internal and external fits, the straight edge section of the bellows body can be directly inserted into the flange to be welded. However, for the welding of the fourth type of bellows, QD model, which has no straight wall section and is cut at the crest, it is necessary to ensure that the axis of the bellows is coaxial with the flange to be welded. Currently, the axial alignment of QD model bellows is generally done manually, but this alignment method has the characteristics of poor alignment effect, large error and low alignment efficiency.

[0003] To improve the alignment of the QD model metal bellows body with its end flanges during welding, existing methods typically involve placing the flanges at the top and bottom of the metal bellows body, and then using a metal columnar central support rod to sequentially pass through the upper flange, the middle metal bellows body, and the lower flange. This metal columnar central support rod provides axial positioning and alignment between the metal bellows body and the end flanges from the inside. Simultaneously, to ensure the welded portions of the metal bellows body (the QD model metal bellows body has thin connecting plates at both ends) are properly aligned... Figure 1 As shown, the metal bellows body is tightly fitted with the upper and lower welded flanges. An external support device is fitted on the outside of the metal bellows body. The top annular end face of the external support device abuts against the bottom end face of the upper connecting piece of the metal bellows body, and the bottom annular end face of the external support device abuts against the top end face of the lower connecting piece of the metal bellows body, so as to abut the welded part of the metal bellows body against the upper and lower welded flanges.

[0004] The existing welding support for QD type metal bellows requires internal and external support fixtures to support the bellows from both the inside and outside, ensuring axial synchronization and good fit between the bellows and the flange during welding, thus guaranteeing a good welding result. However, since different QD type metal bellows have varying diameters, and various models of internal and external support devices are available, each device is used to support bellows of different diameters. Every time the bellows is replaced, the entire internal and external welding support fixture needs to be replaced. This results in poor adaptability of the existing welding support fixtures for QD type metal bellows, making it unable to support bellows with different inner diameters, thus incurring significant costs. Summary of the Invention

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a multi-size corrugated pipe welding platform, which solves the technical problem that the existing QD model metal corrugated pipe welding internal and external support tooling has poor adaptability and cannot be matched with the support work of metal corrugated pipes with different inner diameters, thus incurring a lot of costs.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] This invention provides a multi-size corrugated pipe welding platform, including a base. A vertical mounting mechanism is provided at one top end of the base, and a central support mechanism is detachably mounted at the other top end of the base. The central support mechanism can extend outward along the radial direction of the metal corrugated pipe body to be welded to abut against the inner wall of the metal corrugated pipe body, so that the metal corrugated pipe body and the central support mechanism are coaxial. An external support mechanism is fitted around the metal corrugated pipe body to be welded, and the external support mechanism can abut the connecting pieces at the upper and lower ends of the metal corrugated pipe body against the upper flange and lower flange to be welded, respectively.

[0008] A detection mechanism is detachably installed on the side of the vertical mounting mechanism near the upper flange. An adjustment mechanism is fitted on the outside of the upper flange and / or the lower flange. The detection mechanism is located above the upper flange and can detect the axis of the central support mechanism and send the coordinate information of the axis to the control center. The control center receives the coordinate information of the axis and controls the extension end of the adjustment mechanism to extend / retract radially along the central support mechanism, thereby moving the upper flange or the lower flange so that the upper flange, the metal bellows body, and the lower flange are coaxial.

[0009] Optionally, the central support mechanism includes a central shaft and two top support assemblies mounted at the upper and lower ends of the central shaft;

[0010] The bottom end of the central shaft is detachably connected to the base;

[0011] Each of the aforementioned top support components includes a displacement structure, a connecting rod structure, a sleeve, and a top support body;

[0012] Both the displacement structure and the sleeve are fitted onto the central shaft, and the displacement structure is threaded onto the central shaft. The top sleeve is fixedly installed on the central shaft, and the bottom sleeve is movably installed on the central shaft.

[0013] The adjusting mechanism is located on the side of the sleeve near the end of the central axis, and the displacement structure can move closer to / away from the sleeve corresponding to it along the axial direction of the central axis.

[0014] The linkage structure includes a first linkage and a second linkage. One end of the first linkage is hinged to the displacement structure, and the other end of the first linkage is hinged to one end of the second linkage to form a hinge fulcrum. The hinge fulcrum is located on the top support body. The other end of the second linkage is hinged to the sleeve corresponding to it. The displacement structure can move axially along the central axis to move closer to / away from the sleeve, so that the linkage structure drives the top support body to extend or retract in the radial direction along the central axis.

[0015] Optionally, the displacement structure includes a displacement sleeve, a connecting sleeve, and a limiting sleeve, all sleeved on the central shaft, and the connecting sleeve is located between the displacement sleeve and the limiting sleeve.

[0016] The displacement sleeve is located on the side of the central shaft near its end face, and both the displacement sleeve and the limiting sleeve are threadedly connected to the outer side wall of the central shaft. The upper and lower end faces of the connecting sleeve abut against the end faces of the displacement sleeve and the limiting sleeve, respectively, and the outer side wall of the connecting sleeve is connected to the first connecting rod.

[0017] By screwing the displacement sleeve, the connecting sleeve can be moved along the axial direction of the central axis, thereby driving the top support body to move along the radial direction of the central axis to abut against the inner wall of the metal bellows body.

[0018] Optionally, the top support body includes a waist-shaped support plate, a waist-shaped pad, and a pressure sensor located on the waist-shaped pad;

[0019] The waist-shaped support plate is connected to the hinge point on the side near the central axis. The waist-shaped support plate and the waist-shaped pad are detachably connected. The waist-shaped pad is made of hard rubber. A groove is opened on the side of the waist-shaped pad away from the waist-shaped support plate. The pressure sensor is installed in the groove. The pressure sensor is electrically connected to the control center. The pressure sensor is used to detect whether the waist-shaped pad and the metal bellows body are in place.

[0020] Optionally, the bottom support assembly is mounted to the bottom of the central shaft via a limiting locking member;

[0021] The limiting locking component includes an adjusting clamp surrounding the central shaft and an adjusting bolt capable of locking or loosening the adjusting clamp, so that the adjusting clamp is tightly held on the central shaft;

[0022] The adjusting clamp is fixed to the bottom sleeve by positioning bolts.

[0023] Optionally, the external support mechanism includes a welding sleeve and welding support cylinders disposed at the upper and lower ends of the welding sleeve;

[0024] The inner sidewall of the welding sleeve is provided with annular positioning steps at the top and bottom. The two welding support cylinders can be inserted into the welding sleeve and abut against the annular positioning steps. The welding sleeve and welding support cylinder are fixed by positioning pins inserted radially along the welding sleeve.

[0025] Optionally, the vertical mounting mechanism includes a slide block, on which a sliding mounting plate is slidably mounted along its vertical direction, and an "L"-shaped bracket is detachably mounted on the sliding mounting plate, with the detection mechanism mounted on the "L"-shaped bracket.

[0026] Optionally, the adjustment mechanism includes a mounting ring and a plurality of stepper motors spaced apart circumferentially on the mounting ring;

[0027] The diameter of the mounting ring is larger than that of the upper flange and the lower flange, and the outer wall of the mounting ring is detachably connected to the sliding mounting plate;

[0028] The output shaft of the stepper motor can pass through the mounting ring radially to push the upper flange or the lower flange.

[0029] Optionally, both the welding support cylinder and the welding sleeve are composed of multiple petal-shaped units spliced ​​together.

[0030] Optionally, it may also include a clamping mechanism;

[0031] The clamping mechanism can clamp the welded lower flange, and the top of the central support mechanism is detachably connected to a pressure-pressurizing pipe that can pressurize the metal bellows body.

[0032] The beneficial effects of this invention are as follows: This invention provides a multi-size corrugated pipe welding platform, which is a completely new type of welding platform. It features a vertical mounting mechanism on a base, along with a detection mechanism and an adjustment mechanism mounted on the vertical mounting mechanism. When welding QD-type metal corrugated pipe bodies, a central support mechanism can be set up to convert the axis of the elastic metal corrugated pipe body into the axis of the central support mechanism. After the detection mechanism detects the axis of the central support mechanism and transmits it to the control center, the control center controls the adjustment mechanism to adjust the upper and lower flanges at the top and bottom of the metal corrugated pipe body, respectively. This automatically adjusts the upper and lower flanges of the metal corrugated pipe body to ensure that the metal corrugated pipe body, the upper flange, and the lower flange are coaxial, ensuring a good welding effect. Furthermore, the central support mechanism can extend outwards along the radial direction of the metal corrugated pipe body to abut against the inner wall of the metal corrugated pipe body, accommodating metal corrugated pipe bodies with different inner diameters. This solves the technical problem that existing welding internal and external support tooling has poor adaptability and cannot be used to support metal corrugated pipe bodies with different inner diameters. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the multi-size corrugated pipe welding platform of the present invention (welding process);

[0034] Figure 2 This is a three-dimensional structural diagram of the multi-size corrugated pipe welding platform of the present invention (pressure testing process);

[0035] Figure 3 for Figure 2 A partial cross-sectional structural diagram;

[0036] Figure 4 for Figure 1 A three-dimensional structural diagram of the central support mechanism;

[0037] Figure 5 for Figure 1 A three-dimensional view of the central metal bellows assembly and the central support mechanism;

[0038] Figure 6 for Figure 5 An exploded structural diagram of the external support mechanism and upper and lower flanges (the metal bellows body is not shown);

[0039] Figure 7 This is a schematic diagram of the structure of a metal bellows body assembly formed by welding the metal bellows body.

[0040] Explanation of reference numerals in the attached figures

[0041] 1: Base;

[0042] 2: Vertical mounting mechanism; 21: Slide block; 22: Sliding mounting plate; 23: "L" shaped bracket;

[0043] 3: Central support mechanism; 31: Central shaft; 32: Top support assembly; 321: Displacement structural component; 3211: Displacement sleeve; 3212: Connecting sleeve; 3213: Limiting sleeve; 322: Sleeve; 323: Top support body; 3231: Waist-shaped support plate; 3232: Waist-shaped pad; 3233: Pressure sensor; 324: First connecting rod; 325: Second connecting rod; 326: Auxiliary transmission rod; 33: Limiting locking component; 331: Adjusting clamp; 332: Adjusting bolt; 333: Positioning bolt;

[0044] 4: Metal bellows body;

[0045] 5: External support mechanism; 51: Welded sleeve; 511: Annular positioning step; 52: Welded support cylinder; 53: Positioning pin;

[0046] 6: Upper flange;

[0047] 7: Lower flange;

[0048] 8: Testing institutions;

[0049] 9: Adjustment mechanism; 91: Mounting ring; 92: Stepper motor;

[0050] 10: Clamping mechanism;

[0051] 100: Suppression and takeover;

[0052] 200: Flattened end wave;

[0053] 300: Locking bolt;

[0054] 400: Lock nut;

[0055] 500: Install flange;

[0056] 600: Pressing stop block;

[0057] 700: Tighten the nut. Detailed Implementation

[0058] To better explain and facilitate understanding of the present invention, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 The position of the middle base 1 relative to the vertical mounting mechanism 2 is defined as "lower". Figure 4The position of the limiting locking member 33 of the central support mechanism 3 relative to the central shaft 31 is defined as "down".

[0059] Before introducing the embodiments, it should be noted that: the metal bellows body 4 is a QD model metal bellows body 4. Before welding, the top of the metal bellows body 4 is provided with an upper flange 6 and the bottom is provided with a lower flange 7. The upper flange 6, the metal bellows body 4 and the lower flange 7 together form the main body to be welded. The top of the central support mechanism 1 is detachably connected to a pressure pipe 100 that can pressurize towards the inside of the metal bellows body 4. The external support mechanism 5 is a cylindrical structure, and the upper and lower flattened ends 200 of the metal bellows body 4 pass through the external support mechanism 5 and abut against the upper and lower end faces of the external support mechanism 5 respectively.

[0060] See Figures 1 to 7 As shown in the figure, a multi-size corrugated pipe welding platform proposed in this embodiment of the invention includes a base 1. A vertical mounting mechanism 2 is provided at one top end of the base 1, and a central support mechanism 3 is detachably installed at the other top end of the base 1. The central support mechanism 3 can extend outward along the radial direction of the metal corrugated pipe body 4 to be welded to abut against the inner wall of the metal corrugated pipe body 4, so that the metal corrugated pipe body 4 and the central support mechanism 3 are coaxial. An external support mechanism 5 is fitted on the outside of the metal corrugated pipe body 4 to be welded. The external support mechanism 5 can abut the connecting pieces 41 at the upper and lower ends of the metal corrugated pipe body 4 against the upper flange 6 and the lower flange 7 to be welded, respectively. A detection mechanism 8 is detachably installed on the side of the vertical mounting mechanism 2 near the upper flange 6. An adjustment mechanism 9 is fitted on the outside of the upper flange 6 and / or the lower flange 7. The detection mechanism 8 is located above the upper flange 6 and can detect the axis of the central support mechanism 3 and send the coordinate information of the axis to the control center. The control center receives the coordinate information of the axis and controls the extension end of the adjustment mechanism 9 to extend / retract radially along the central support mechanism 3, thereby moving the upper flange 6 or the lower flange 7 so that the upper flange 6, the metal bellows body 4 and the lower flange 7 are coaxial.

[0061] Furthermore, the detection mechanism 8 is a matrix camera, which can promptly acquire the coordinates of the axial center of the metal bellows body 4 and store this point as a reference point in the control center. After the reference point is determined, the control center controls the adjustment mechanism 9 to adjust the axial position of the upper flange 6 and the lower flange 7 according to the coordinates of the reference point, so that the upper and lower flanges are coaxial with the metal bellows body 4, and then ensures that during welding, the QD model metal bellows is circumferentially positioned to ensure coaxiality.

[0062] In this embodiment, by setting a vertical mounting mechanism 2 on the base 1 and a detection mechanism 8 and an adjustment mechanism 9 installed on the vertical mounting mechanism 2, when welding the QD model metal corrugated pipe body 4, the axis of the elastic material metal corrugated pipe body 4 can be converted into the axis of the central support mechanism 3 by setting a central support mechanism 3. That is, after the detection mechanism 8 detects the axis of the central support mechanism 3 and transmits it to the control center, the control center controls the adjustment mechanism to adjust the upper flange 6 and lower flange 7 at the top and bottom of the metal corrugated pipe body 4 respectively. That is, the upper flange 6 and lower flange 7 of the metal corrugated pipe body 4 can be automatically adjusted to make the metal corrugated pipe body 4, the upper flange 6 and the lower flange 7 coaxial, ensuring the welding effect. On this basis, the central support mechanism 3 can extend outward along the radial direction of the metal corrugated pipe body 4 to abut against the inner wall of the metal corrugated pipe body 4 to accommodate metal corrugated pipe bodies 4 with different inner diameters. This solves the technical problem that the existing welding internal and external support tooling has poor adaptability and cannot be used to support different sizes of the inner diameter of the metal bellows body 4.

[0063] Furthermore, the central support mechanism 3 includes a central shaft 31 detachably connected to the center of the base 1 at its bottom end, and two top support assemblies 32 mounted at the upper and lower ends of the central shaft 31. Each top support assembly 32 includes a displacement structure 321, a connecting rod structure, a sleeve 322, and a top support body 323. The displacement structure 321 and the sleeve 322 are both fitted onto the central shaft 31, with the displacement structure 321 threaded onto the central shaft 31. The top sleeve 322 is fixedly mounted on the central shaft 31, and the bottom sleeve 322 is movably mounted on the central shaft 31. An adjustment mechanism 9 is located on the side of the sleeve 322 near the end of the central shaft 31, allowing the displacement structure 321 to move closer to or further away from its corresponding sleeve 322 along the axial direction of the central shaft 31. The linkage structure includes a first linkage 324 and a second linkage 325. One end of the first linkage 324 is hinged to the displacement structure 321, and the other end of the first linkage 324 is hinged to one end of the second linkage 325 to form a hinge fulcrum. The hinge fulcrum is located on the top support body 323. The other end of the second linkage 325 is hinged to its corresponding sleeve 322. The displacement structure 321 can move axially along the central axis 31 to move closer to / away from the sleeve 322, so that the linkage structure drives the top support body 323 to extend or retract in the radial direction of the central axis 31.

[0064] It should be noted that, in this embodiment, the central support mechanism 3 of the combined tooling, in addition to being able to adapt to metal bellows bodies 4 with different inner diameters, can also fine-tune the axial length according to slight differences in the axial length of the metal bellows bodies 4. Specifically, the bottom sleeve 322 is movably mounted on the central shaft 31. This movable mounting means that the bottom top support assembly 32 is mounted on the bottom of the central shaft 31 via a limiting locking member 33. The limiting locking member 33 includes an adjusting clamp 331 surrounding the central shaft 31 and an adjusting bolt 332 capable of locking or loosening the adjusting clamp 331, so that the adjusting clamp 331 is tightly held on the central shaft 31. The adjusting clamp 331 and the bottom sleeve 322 are fixed by the positioning bolt 333. When the bottom support assembly is not positioned correctly in the axial direction, the adjusting bolt 332 can be loosened to allow the adjusting clamp 331 to slide against the central shaft 31. This causes the bottom sleeve 322, which is fixedly connected to the adjusting clamp 331 by the positioning bolt 333, to move upward or downward along the central shaft 31. When it moves to the appropriate position on the central shaft 31, the adjusting bolt 332 is tightened to hold the adjusting clamp 331 tightly against the outer wall of the central shaft 31. This makes the central support mechanism 3 highly adaptable. Moreover, in order to support metal bellows bodies 4 of different lengths, only the welded support cylinder 52 needs to be replaced. Different inner diameters and appropriate adjustments to the axial position of the support assembly 32 can be made to achieve better support effect and better central shaft conversion effect, further facilitating the welding of the metal bellows body 4 to the upper and lower flanges.

[0065] Furthermore, it should be noted that in this embodiment, the limiting locking member 33, located below the top support assembly 32, can finely adjust the distance between the lower and upper top support assemblies 32, thereby facilitating the top support operation of metal bellows bodies 4 with different axial lengths (within a certain range). This greatly improves adaptability and reduces the cost of tooling. Previously, one tooling required one top support shaft; in this embodiment, one top support assembly 23 can adapt to metal bellows bodies 4 of various sizes.

[0066] It should also be noted that the internal support for the metal bellows body 4 with different inner diameters can be adjusted by the central support mechanism 3 to change the inner diameter. Correspondingly, the outer diameter also needs to be changed to accommodate metal bellows bodies 4 with different diameters. Changing the outer diameter requires changing the diameter of the welding sleeve 51 and welding support cylinder 52 of the external support mechanism 5. Replacing the welding sleeve 51 requires setting the welding support cylinder 52 to be multi-lobed to meet the needs of metal bellows bodies 4 with different diameters.

[0067] Furthermore, the displacement structure 321 includes a displacement sleeve 3211, a connecting sleeve 3212, and a limiting sleeve 3213, all sleeved on the central shaft 31, with the connecting sleeve 3212 located between the displacement sleeve 3211 and the limiting sleeve 3213. The displacement sleeve 3211 is located on the side of the central shaft 31 closest to its end face, and both the displacement sleeve 3211 and the limiting sleeve 3213 are threadedly connected to the outer wall of the central shaft 31. The upper and lower end faces of the connecting sleeve 3212 abut against the end faces of the displacement sleeve 3211 and the limiting sleeve 3213, respectively, and the outer wall of the connecting sleeve 3212 is connected to the first connecting rod 324. By screwing the displacement sleeve 3211, the connecting sleeve 3212 can move along the axial direction of the central shaft 31, thereby driving the top support body 323 to move along the radial direction of the central shaft 31 to abut against the inner wall of the metal bellows body 4.

[0068] See Figure 3 As shown, both ends of the central shaft 31 are threaded, connecting the displacement sleeve 3211 and the limiting sleeve 3213. The limiting sleeve 3213 extends radially outward and has an annular stepped end face to abut against the bottom end face of the connecting sleeve 3212 to prevent the connecting sleeve 3212 from sliding. Furthermore, both ends of the central shaft 31 have threaded holes. The threaded hole on the upper end face is used to connect the connecting pressure pipe 100, and the threaded hole on the lower end face is used to connect the base 1. The connecting sleeve 3212 and the displacement sleeve 3211 are clearance-fitted. The purpose of the clearance fit is to ensure that the displacement sleeve 3211 does not rotate when screwed, while simultaneously ensuring a certain axial displacement. Specifically, tightening the displacement sleeve 3211 causes the connecting sleeve 3212 to move axially, with the displacement of the connecting sleeve 3212 restricted by the limiting sleeve 3213, ensuring it does not detach from the displacement sleeve 132. The displacement of the connecting sleeve 3212 causes the first connecting rod 324 and the second connecting rod 325 to rotate hingedly on the waist-shaped support plate 3231, increasing or decreasing the included angle between the first connecting rod 324 and the second connecting rod 325. This changes the radial displacement of the waist-shaped pad 3232 relative to the central axis 31, thereby causing the waist-shaped support plate 3231 and the waist-shaped pad 3232 to move, ultimately driving the rotation of the auxiliary transmission rod 326. This achieves the purpose of supporting metal bellows bodies 4 with different inner diameters. The auxiliary transmission rod 326 is designed to accommodate the waist-shaped pad 3232, thus improving the support effect. By additionally setting two sleeves 322 and an auxiliary transmission rod 326, the support action of the top support body 323 is better coordinated, and the effective transmission of radial displacement is ensured, thereby improving the adjustment efficiency and quality of radial displacement. The waist-shaped support plate 3231 and the waist-shaped pad 3232 are connected by bolts, and the first connecting rod 324, the second connecting rod 325, the auxiliary transmission rod 326, the connecting sleeve 3212, and the sleeve 322 are connected by connecting pins.

[0069] Furthermore, there are multiple top support bodies 323, preferably three. The three top support bodies 323 are spaced apart circumferentially along the connecting sleeve 3212. This allows for more even stress distribution on the top support during welding, resulting in better performance.

[0070] It should be noted that there are three support units 14, which provide good support. It should also be noted that both the connecting sleeve 3212 and the sleeve 322 are equipped with rotating supports that rotate with the rotating connecting rod 141 and the auxiliary transmission rod 326.

[0071] Furthermore, the top support body 323 includes a waist-shaped support plate 3231, a waist-shaped pad 3232, and a pressure sensor 3233 located on the waist-shaped pad 3232. The side of the waist-shaped support plate 3231 closest to the central axis 31 is connected to a hinge point. The waist-shaped support plate 3231 and the waist-shaped pad 3232 are detachably connected. The waist-shaped pad 3232 is made of hard rubber. A groove is formed on the side of the waist-shaped pad 3232 away from the waist-shaped support plate 3231, and the pressure sensor 3233 is installed in the groove. The pressure sensor 3233 is electrically connected to the control center. The pressure sensor 3233 is used to detect whether the waist-shaped pad 3232 is properly positioned with the metal bellows body 4 and to prevent excessive support force from damaging the metal bellows body 4. The waist-shaped support plate 3231 and the waist-shaped pad 3232 are detachably connected, and the waist-shaped pad 3232 is made of hard rubber. The waist-shaped pad 3232 is made of rubber, which prevents damage to the interior of the metal bellows body 4 when supporting it, thus protecting the metal bellows body 4. The waist-shaped support plate 3231 and the waist-shaped pad 3232 are detachably connected, which facilitates installation and periodic replacement of the waist-shaped pad 3232.

[0072] The pressure sensor 3233 collects the top support pressure between the waist-shaped support pad 3232 and the metal bellows body 4, and determines whether the central support mechanism 1 is properly supported based on this pressure, preventing excessive support force from damaging the metal bellows body 4. Simultaneously, a signal indicating that the support is in place is sent to the control center. After receiving the signal that the metal bellows body 4 is properly supported, the control center uses the control detection mechanism 8 to collect data at the coordinate point of the central axis 31.

[0073] Furthermore, the external support mechanism 5 includes a welding sleeve 51 and welding support cylinders 52 disposed at the upper and lower ends of the welding sleeve 51. The inner sidewalls of the welding sleeve 51 are respectively provided with annular positioning steps 511 at the top and bottom. The two welding support cylinders 52 can be inserted into the welding sleeve 51 and abut against the annular positioning steps 511. The welding sleeve 51 and welding support cylinders 52 are fixed by positioning pins 53 inserted radially along the welding sleeve 51. The annular positioning steps 511 facilitate the axial positioning of the welding support cylinders 52.

[0074] Furthermore, the welding sleeve 51 is made of aluminum, and the welding support cylinder 52 is made of copper. The welding support cylinder 52 is instead made of multiple components; the welding support block is made of copper, and the length adjustment block is made of aluminum, connected by a positioning pin 53. This reduces the amount of copper used, saving manufacturing costs. While reducing costs, the welding support cylinder 52 is made of copper to ensure good thermal conductivity, and the positioning pin 53 connects the welding sleeve 51 and the welding support cylinder 52. For metal bellows bodies 4 of different lengths, the overall length of the external support mechanism 5 can be adjusted by adjusting the length of the welding sleeve 51.

[0075] Furthermore, both the welded support cylinder 52 and the welded sleeve 51 are assembled from multiple petal-shaped units. This facilitates replacement and regular maintenance, and is easy to operate; only the adjacent petals need to be removed. It should be noted that existing positioning methods such as bolts and locating pins can be used to position the adjacent petals.

[0076] Furthermore, the vertical mounting mechanism 2 includes a slide ram 21, on which a sliding mounting plate 22 is slidably mounted. An "L"-shaped bracket 23 is detachably mounted, and the detection mechanism 8 is mounted on the "L"-shaped bracket 23. The "L"-shaped bracket 23 facilitates the installation of the detection mechanism 8 and also facilitates detection. Moreover, during pressure testing, the "L"-shaped bracket 23 can be detached from the sliding mounting plate 22 to cooperate with the pressure testing operation.

[0077] Furthermore, the adjustment mechanism 9 includes a mounting ring 91 and a plurality of stepper motors 92 spaced apart circumferentially from the mounting ring 91. The diameter of the mounting ring 91 is larger than that of the upper flange 6 and the lower flange 7, and the outer wall of the mounting ring 91 is detachably connected to the sliding mounting plate 22. The output shafts of the stepper motors 92 can pass through the mounting ring 91 radially to push the upper flange 6 or the lower flange 7. The arrangement of the stepper motors 92 allows for more precise control of the upper and lower flanges.

[0078] Furthermore, it also includes a clamping mechanism 10. The clamping mechanism 10 can clamp the welded lower flange 7, and the top of the central support mechanism 3 is detachably connected to a pressure-pressuring pipe 100 that can pressurize the metal bellows body 4. The clamping mechanism 10 includes clamping members spaced circumferentially along the lower flange 7 of the welded metal bellows assembly, and the clamping members can be moved downwards by tightening the nuts to clamp and fix the bottom end of the clamping piece to the lower flange 7 for the pressure-pressuring process. This clamping mechanism is simple and convenient. In this embodiment, the welding platform is converted into a welding and pressure-pressuring integrated platform. Existing welding and pressure-pressuring processes use two different fixtures at two different workstations. When pressurizing different QD models of metal bellows, it is necessary to ensure both sealing and length-direction limitation. The pressure-pressuring fixtures still have poor adaptability; welding and pressure-pressuring for one model generally requires two sets of fixtures, and changing fixtures will consume a lot of time and cost. Compared with existing technologies, this embodiment can directly perform pressure tests such as airtightness and pressure resistance after welding, reducing the time for changing tooling in different processes, and integrating multi-size corrugated welding and pressure testing functions.

[0079] In this embodiment, the metal bellows body 4, upper flange 6, and lower flange 7 need to be welded first. After welding, the parts are allowed to cool and then pressure is applied. The specific welding process is as follows: the coaxiality of the QD model metal bellows body 4 is confirmed by the central support mechanism 3. Then, the position of the central axis 31 is detected by the detection mechanism 8, which is the axial position of the metal bellows body 4. The upper and lower flanges are adjusted by the adjustment mechanism 9 to align them with this position. The upper and lower flattened ends 200 of the metal bellows body 4 are abutted against the upper flange 6 and the lower flange 7 to be welded by the welding support cylinders 52 at the upper and lower ends of the external support mechanism 5. At the same time, the detection mechanism 8 and the "L"-shaped bracket 23 are welded.

[0080] After welding, a mounting flange 500 is installed on the upper flange 6, and the mounting flange 500 is detachably connected to the welded upper flange 6 using locking bolts 300 and locking nuts 400. The pressure-pressurizing pipe 100 is fixed above the central shaft 31 by a pressure stop 600 and a pressure nut 700 at the top of the mounting flange 500, and the pressure-pressurizing pipe 100 is detachably mounted on the central shaft 31. It should also be noted that after the pressure-pressurizing pipe 100 enters the welded metal bellows assembly, it has a pressure outlet on its side wall, allowing it to pressurize the metal bellows assembly. The pressure-pressurizing interface of the pressure-pressurizing pipe 100 injects water pressure into the welded metal bellows body assembly, sealing the lower flange 7 and the base 1 with sealing rings. The central support mechanism 3, the upper flange 6 and the base 1, the pressure stop 600, and the pressure nut 700 limit the length of the metal bellows body to prevent it from shifting. The clamping mechanism 10 axially limits the metal bellows body, ensuring the stability of the pressure test.

[0081] In this embodiment, the inner control part of the metal bellows body 4 is supported by the central support mechanism 3. The upper and lower cylindrical surfaces of the pressure pipe 100 are threaded. The connection between the pressure pipe 100 and the upper flange 6 is an optical axis, and it is sealed with the upper flange 6 by a sealing ring. The pressure pipe 100 is connected to the central support mechanism 3 by threads. The pressure pipe 100 has a light hole in the center and holes on the side so that water can smoothly enter the metal bellows body assembly during the water pressure test.

[0082] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A multi-size corrugated pipe welding platform, characterized in that: Includes a base (1), with a vertical mounting mechanism (2) at one top end of the base (1) and a central support mechanism (3) detachably mounted at the other top end of the base (1). The central support mechanism (3) can extend outward along the radial direction of the metal corrugated pipe body (4) to be welded to abut against the inner wall of the metal corrugated pipe body (4) so ​​that the metal corrugated pipe body (4) and the central support mechanism (3) are coaxial. The metal corrugated pipe body (4) to be welded is fitted with an external support mechanism (5). The external support mechanism (5) can abut the connecting pieces (41) at the upper and lower ends of the metal corrugated pipe body (4) to the upper flange (6) and lower flange (7) to be welded, respectively. The vertical mounting mechanism (2) has a detection mechanism (8) detachably installed on the side near the upper flange (6). The upper flange (6) and / or the lower flange (7) are fitted with an adjustment mechanism (9). The detection mechanism (8) is located above the upper flange (6) and can detect the axis of the central support mechanism (3) and send the coordinate information of the axis to the control center. The control center receives the coordinate information of the axis and controls the extended end of the adjustment mechanism (9) to extend / retract along the radial direction of the central support mechanism (3), and moves the upper flange (6) or the lower flange (7) so that the upper flange (6), the metal bellows body (4) and the lower flange (7) are coaxial. The central support mechanism (3) includes a central shaft (31) and two top support components (32) installed at the upper and lower ends of the central shaft (31). The bottom end of the central shaft (31) is detachably connected to the base (1); Each of the top support components (32) includes a displacement structure (321), a connecting rod structure, a sleeve (322), and a top support body (323). The displacement structure (321) and the sleeve (322) are both fitted onto the central shaft (31), and the displacement structure (321) is threaded onto the central shaft (31). The top sleeve (322) is fixedly installed on the central shaft (31), and the bottom sleeve (322) is movably installed on the central shaft (31). The adjustment mechanism (9) is located on the side of the sleeve (322) near the end of the central shaft (31), and the displacement structure (321) can move closer to / away from the sleeve (322) in the axial direction of the central shaft (31). The linkage structure includes a first link (324) and a second link (325). One end of the first link (324) is hinged to the displacement structure (321), and the other end of the first link (324) is hinged to one end of the second link (325) to form a hinge fulcrum. The hinge fulcrum is located on the top support body (323). The other end of the second link (325) is hinged to the sleeve (322) corresponding to it. The displacement structure (321) can move axially along the central axis (31) to move closer to / away from the sleeve (322), so that the linkage structure drives the top support body (323) to extend or retract in the radial direction of the central axis (31). The external support mechanism (5) includes a welding sleeve (51) and welding support cylinders (52) disposed at the upper and lower ends of the welding sleeve (51). The inner sidewall of the welding sleeve (51) is provided with annular positioning steps (511) at the top and bottom respectively. The two welding support cylinders (52) can be inserted into the welding sleeve (51) and abut against the annular positioning steps (511). The welding sleeve (51) and the welding support cylinder (52) are fixed by the positioning pin (53) inserted radially along the welding sleeve (51). The vertical mounting mechanism (2) includes a slide block (21), on which a sliding mounting plate (22) is slidably mounted along its vertical direction. An "L"-shaped bracket (23) is detachably mounted on the sliding mounting plate (22), and the detection mechanism (8) is mounted on the "L"-shaped bracket (23). The adjustment mechanism (9) includes a mounting ring (91) and a plurality of stepper motors (92) spaced apart around the mounting ring (91). The diameter of the mounting ring (91) is larger than that of the upper flange (6) and the lower flange (7), and the outer wall of the mounting ring (91) is detachably connected to the sliding mounting plate (22); The output shaft of the stepper motor (92) can pass through the mounting ring (91) radially to push the upper flange (6) or the lower flange (7).

2. The multi-size corrugated pipe welding platform as described in claim 1, characterized in that: The displacement structure (321) includes a displacement sleeve (3211), a connecting sleeve (3212), and a limiting sleeve (3213) all sleeved on the central shaft (31), and the connecting sleeve (3212) is located between the displacement sleeve (3211) and the limiting sleeve (3213); The displacement sleeve (3211) is located on the side of the central shaft (31) near its end face, and both the displacement sleeve (3211) and the limiting sleeve (3213) are threadedly connected to the outer side wall of the central shaft (31). The upper and lower end faces of the connecting sleeve (3212) abut against the end faces of the displacement sleeve (3211) and the limiting sleeve (3213) respectively, and the outer side wall of the connecting sleeve (3212) is connected to the first connecting rod (324). By screwing the displacement sleeve (3211), the connecting sleeve (3212) can move along the axial direction of the central axis (31), thereby driving the top support body (323) to move along the radial direction of the central axis (31) to abut against the inner wall of the metal bellows body (4).

3. The multi-size corrugated pipe welding platform as described in claim 2, characterized in that: The top support body (323) includes a waist-shaped support plate (3231), a waist-shaped pad (3232), and a pressure sensor (3233) located on the waist-shaped pad (3232). The waist-shaped support plate (3231) is connected to the hinge point on the side near the central axis (31). The waist-shaped support plate (3231) and the waist-shaped pad (3232) are detachably connected. The waist-shaped pad (3232) is made of hard rubber. A groove is provided on the side of the waist-shaped pad (3232) away from the waist-shaped support plate (3231). The pressure sensor (3233) is installed in the groove. The pressure sensor (3233) is electrically connected to the control center. The pressure sensor (3233) is used to detect whether the waist-shaped pad (3232) and the metal corrugated pipe body (4) are in place.

4. The multi-size corrugated pipe welding platform as described in claim 1, characterized in that: The bottom support assembly (32) is mounted to the bottom of the central shaft (31) by a limiting locking member (33); The limiting locking member (33) includes an adjusting clamp (331) surrounding the central shaft (31) and an adjusting bolt (332) capable of locking or loosening the adjusting clamp (331) so that the adjusting clamp (331) is tightly held on the central shaft (31); The adjusting clamp (331) is fixed to the sleeve (322) at the bottom by a positioning bolt (333).

5. The multi-size corrugated pipe welding platform as described in claim 1, characterized in that: Both the welding support cylinder (52) and the welding sleeve (51) are composed of multiple petal-shaped units spliced ​​together.

6. The multi-size corrugated pipe welding platform as described in claim 1, characterized in that: It also includes a clamping mechanism (10); The clamping mechanism (10) can clamp the welded lower flange (7), and the top of the central support mechanism (3) is detachably connected to a pressure pipe (100) that can pressurize the metal bellows body (4).

Images