Multi-size corrugated pipe welding platform

Abstract

The invention relates to the technical field of metal corrugated pipe manufacturing and testing, in particular to a multi-size corrugated pipe welding platform which comprises a base, a vertical installation mechanism arranged on the base, a detection mechanism and an adjusting mechanism, and the detection mechanism and the adjusting mechanism are installed on the vertical installation mechanism. The center supporting mechanism is arranged so that the axis of the metal corrugated pipe body made of the elastic material can be converted into the axis of the center supporting mechanism, that is, the axis of the center supporting mechanism is detected through the detection mechanism and uploaded to a control center; the control center automatically controls the adjusting mechanism to adjust the upper flange and the lower flange at the top and the bottom of the metal corrugated pipe body respectively, so that the upper flange, the lower flange and the metal corrugated pipe body are coaxial, and the welding effect is ensured. Meanwhile, the center supporting mechanism can extend outwards in the radial direction of the metal corrugated pipe body to abut against the inner wall of the metal corrugated pipe body so as to be matched with the metal corrugated pipe bodies with different inner diameter sizes.

Description

Technical Field

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

[0002] The metal bellows assembly includes a metal bellows body and connecting flanges welded to the upper and lower ends. There are five basic structural types of the end structures of the connecting parts at both ends of the bellows body: the first type is internally matched, represented by N; the second type is externally matched, represented by W; the third type is closed bottom, represented by D; the fourth type is cut off at the crest without a straight wall section, represented by QD (see Figure 1 As shown); the fifth type has no straight wall section cut off at the trough and is represented by Qd. The end structures of the bellows are any combination of the above 5 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 for welding. However, for the welding of the fourth type of QD type bellows without straight wall sections cut off at the wave crest, it is necessary to ensure that the axis of the bellows is coaxial with the flange to be welded. At present, the axial alignment of QD type bellows welding is generally carried out by manual matching alignment, but this alignment method has the characteristics of poor alignment effect, large error and low alignment efficiency.

[0003] In order to improve the alignment effect of the QD type metal bellows body and its two end flanges, the existing general is to first place the flanges at the upper and lower ends of the metal bellows body, and use a metal column center support rod to pass through the upper flange, the middle metal bellows body and the lower flange from top to bottom, and use the metal column center support rod to axially position and align the metal bellows body and the flanges at both ends from the inside. At the same time, in order to ensure the welding part of the metal bellows body (the upper and lower ends of the QD type metal bellows body have thin connecting pieces (see Figure 1 As shown in the figure, it fits tightly with the upper and lower welded flanges, and an external support device is mounted on the outside of the metal bellows body, and 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 welding part of the metal bellows body against the upper and lower welded flanges.

[0004] That is, for the existing QD type metal bellows, it is necessary to use internal and external support tools to support the inside and outside of the metal bellows respectively during welding support, so as to ensure that the metal bellows is axially synchronized with the flange during welding and has a good fit effect, thereby ensuring the welding effect. However, since the diameters of different QD type metal bellows are also different, there are many types of internal and external support devices currently available. Different types of internal and external support devices are used to support metal bellows bodies of different diameters. Every time the metal bellows is replaced, the overall internal and external welding support tooling needs to be replaced accordingly. As a result, the existing QD type metal bellows welding internal and external support tooling has poor adaptability and cannot cooperate with the support work of metal bellows with different inner diameters. As a result, a lot of costs will be consumed. 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 bellows welding platform, which solves the technical problem that the existing QD model metal bellows welding internal and external supports have poor adaptability and cannot cooperate with the support work of different sizes of inner diameters of metal bellows, which will consume a lot of cost.

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] The embodiment of the present invention provides a multi-size bellows welding platform, comprising a base, a vertical mounting mechanism is arranged at one end of the top of the base, a central supporting mechanism is detachably mounted at the other end of the top of the base, the central supporting mechanism can extend outward along the radial direction of a metal bellows body to be welded to abut against the inner wall of the metal bellows body, so that the metal bellows body is coaxial with the central supporting mechanism, an external supporting mechanism is sleeved on the outside of the metal bellows body to be welded, and the external supporting mechanism can abut the connecting pieces at the upper and lower ends of the metal bellows body against the upper flange and the lower flange to be welded respectively;

[0008] A detection mechanism is detachably mounted on one side of the vertical mounting mechanism close to the upper flange, and an adjustment mechanism is mounted on the outside of the upper flange and / or the lower flange. The detection mechanism is located above the upper flange and is capable of detecting the axis of the central support mechanism and sending the coordinate information of the axis to a control center. The control center receives the coordinate information of the axis and controls the protruding end of the adjustment mechanism to extend / retract radially along the central support mechanism, and moves 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 installed at 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 top support assemblies comprises a displacement structure, a connecting rod structure, a sleeve and a top support body;

[0012] The displacement structure and the sleeve are both sleeved on the central shaft, and the displacement structure is threadedly connected to the central shaft, the sleeve at the top is fixedly installed on the central shaft, and the sleeve at the bottom is movably installed on the central shaft;

[0013] The adjusting mechanism is located on the side of the sleeve close to the end of the central axis, and the displacement structure can move closer to or farther away from the corresponding sleeve along the axial direction of the central axis;

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

[0015] Optionally, the displacement structure comprises a displacement sleeve, a connection sleeve and a limit sleeve, all of which are sleeved on the central axis, and the connection sleeve is located between the displacement sleeve and the limit sleeve;

[0016] The displacement sleeve is located on one side of the central shaft close to its end surface, and the displacement sleeve and the limiting sleeve are both threadedly connected to the outer wall of the central shaft, the upper and lower end surfaces of the connecting sleeve are respectively against the end surfaces of the displacement sleeve and the limiting sleeve, and the outer wall of the connecting sleeve is connected to the first connecting rod;

[0017] The displacement sleeve is screwed to enable the connection sleeve to move along the axial direction of the central axis, thereby driving the supporting 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 cushion block and a pressure sensor located on the waist-shaped cushion block;

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

[0020] Optionally, the top support assembly at the bottom is installed at the bottom of the central axis through a limiting locking member;

[0021] The limiting locking member includes an adjusting clamp disposed around 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 sleeve at the bottom by means of positioning bolts.

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

[0024] The inner side walls of the welding sleeve are respectively provided with annular positioning steps at the upper and lower parts. The two welding support tubes can be respectively inserted into the welding sleeve and abut against the annular positioning steps. The welding sleeve and the welding support tube are fixed by inserting positioning pins along the radial direction of the welding sleeve.

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

[0026] Optionally, the adjustment mechanism includes a mounting ring and a plurality of stepper motors spaced apart in a circumferential direction of 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 in a radial direction of the mounting ring to push the upper flange or the lower flange.

[0029] Optionally, the welding support tube and the welding sleeve are both formed by splicing a plurality of petal-shaped monomers.

[0030] Optionally, it also includes a clamping mechanism;

[0031] The clamping mechanism can clamp the welded lower flange, and the top of the central support mechanism is detachably connected with a pressing connecting pipe that can press toward the metal bellows body.

[0032] The beneficial effects of the present invention are as follows: a multi-size bellows welding platform of the present invention is a brand-new welding platform, that is, a vertical mounting mechanism and a detection mechanism and an adjustment mechanism installed on the vertical mounting mechanism are arranged on the base. When welding the QD model metal bellows body, a central support mechanism can be arranged to convert the axis of the metal bellows body made of elastic material into the axis of the central support mechanism. That is, after the axis of the central support mechanism is detected by the detection mechanism and uploaded to the control center, the control center controls the adjustment mechanism to adjust the upper flange and the lower flange at the top and bottom of the metal bellows body respectively, that is, the upper flange and the lower flange of the metal bellows body can be automatically adjusted to make the metal bellows body, the upper flange and the lower flange coaxial to ensure the welding effect. On this basis, the central support mechanism can extend outward along the radial direction of the metal bellows body to abut against the inner wall of the metal bellows body to match metal bellows bodies with different inner diameters. The invention solves the technical problem that the existing welding tooling for internal and external supports has poor adaptability and cannot cooperate with the support work of the metal bellows body with different inner diameter sizes. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0034] Figure 2 It is a three-dimensional structural schematic diagram of the multi-size bellows welding platform of the present invention (pressing process);

[0035] Figure 3 for Figure 2 A schematic diagram of a cross-sectional structure of some parts;

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

[0037] Figure 5 for Figure 1 A perspective view of the middle metal bellows assembly and the center support mechanism;

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

[0039] Figure 7 It is a schematic diagram of the structure of the metal bellows body assembly formed after the metal bellows body is welded.

[0040] Description of Reference Numerals

[0041] 1: Base;

[0042] 2: vertical mounting mechanism; 21: ram; 22: sliding mounting plate; 23: "L" shaped bracket;

[0043] 3: center support mechanism; 31: center axis; 32: top support assembly; 321: displacement structure; 3211: displacement sleeve; 3212: connection sleeve; 3213: limit 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: limit locking member; 331: adjustment clamp; 332: adjustment bolt; 333: positioning bolt;

[0044] 4: Metal bellows body;

[0045] 5: external support mechanism; 51: welding sleeve; 511: annular positioning step; 52: welding support cylinder; 53: positioning pin;

[0046] 6: Upper flange;

[0047] 7: Lower flange;

[0048] 8: Testing agency;

[0049] 9: adjustment mechanism; 91: mounting ring; 92: stepping motor;

[0050] 10: Clamping mechanism;

[0051] 100: Suppression and takeover;

[0052] 200: Flatten end waves;

[0053] 300: locking bolt;

[0054] 400: Locking nut;

[0055] 500: mounting flange;

[0056] 600: tighten the stopper;

[0057] 700: Tighten the nut. DETAILED DESCRIPTION

[0058] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific implementation methods. Figure 1 The position of the middle base 1 relative to the vertical mounting mechanism 2 is defined as "down". Figure 4The position of the limiting locking member 33 of the central supporting mechanism 3 relative to the central axis 31 is defined as “down”.

[0059] Before introducing the embodiment, it should be noted that: the metal bellows body 4 is a QD model metal bellows body 4, and before welding, an upper flange 6 is arranged on the top of the metal bellows body 4, and a lower flange 7 is arranged on the bottom. The upper flange 6, the metal bellows body 4 and the lower flange 7 together form a main body to be welded, and the top of the central support mechanism 1 is detachably connected with a pressing connecting pipe 100 that can press toward the inside of the metal bellows body 4; the external support mechanism 5 is a cylindrical structural member, and the upper and lower flattened end waves 200 of the metal bellows body 4 respectively pass through the external support mechanism 5 and abut against the upper and lower end surfaces of the external support mechanism 5.

[0060] See also Figures 1 to 7 As shown, a multi-size bellows welding platform proposed in an embodiment of the present invention includes a base 1, a vertical mounting mechanism 2 is provided at one end of the top of the base 1, and a central supporting mechanism 3 is detachably installed at the other end of the top of the base 1. The central supporting mechanism 3 can extend outward along the radial direction of the metal bellows body 4 to be welded to abut against the inner wall of the metal bellows body 4, so that the metal bellows body 4 is coaxial with the central supporting mechanism 3, and an external supporting mechanism 5 is mounted on the outside of the metal bellows body 4 to be welded. The external supporting mechanism 5 can respectively abut the connecting pieces 41 at the upper and lower ends of the metal bellows body 4 against the upper flange 6 and the lower flange 7 to be welded. A detection mechanism 8 is detachably installed on one side of the vertical mounting mechanism 2 close to the upper flange 6, and an adjustment mechanism 9 is mounted 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 protruding end of the adjustment mechanism 9 to extend / retract radially along 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.

[0061] Furthermore, the detection mechanism 8 is a matrix camera, which can timely collect the coordinate point of the axial center of the metal bellows body 4 and store the point as a reference point in the control center. After determining the reference point, 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 coordinate point of the reference point, so that the upper and lower flanges are coaxial with the metal bellows body 4 and then ensure that the QD model metal bellows is welded circumferentially to ensure coaxiality.

[0062] In this embodiment, by providing 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 bellows body 4, the central support mechanism 3 can be provided to convert the axis of the metal bellows body 4 made of elastic material into the axis of the central support mechanism 3, that is, after the axis of the central support mechanism 3 is detected by the detection mechanism 8 and uploaded to the control center, the control center controls the adjustment mechanism to adjust the upper flange 6 and the lower flange 7 at the top and bottom of the metal bellows body 4 respectively, that is, the upper flange 6 and the lower flange 7 of the metal bellows body 4 can be automatically adjusted to make the metal bellows body 4, the upper flange 6 and the lower flange 7 coaxial to ensure the welding effect. On this basis, the central support mechanism 3 can extend outward along the radial direction of the metal bellows body 4 to abut against the inner wall of the metal bellows body 4 to match the metal bellows body 4 with different inner diameters. The technical problem that the existing welding tooling for internal and external supports has poor adaptability and cannot cooperate with the support work of the metal bellows body 4 with different inner diameters is solved.

[0063] Furthermore, the central support mechanism 3 includes a central shaft 31 whose bottom end is detachably connected to the center of the base 1 and two top support assemblies 32 installed 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 mounted on the central shaft 31, and the displacement structure 321 is threadedly connected to 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. The 9 adjustment mechanisms are located on the side of the sleeve 322 close to the end of the central shaft 31, and the displacement structure 321 can approach / move away from the corresponding sleeve 322 along the axial direction of the central shaft 31. The connecting rod structure includes a first connecting rod 324 and a second connecting rod 325. One end of the first connecting rod 324 is hinged to the displacement structure 321, and the other end of the first connecting rod 324 is hinged to one end of the second connecting rod 325 to form a hinge fulcrum. The hinge fulcrum is located on the top support body 323, and the other end of the second connecting rod 325 is hinged to its corresponding sleeve 322. The displacement structure 321 can move axially along the central axis 31 to approach / move away from the sleeve 322, so that the connecting rod structure drives the top support body 323 to extend or retract along the radial direction of the central axis 31.

[0064] It should be noted here that the central support mechanism 3 of the combined tooling in this embodiment can not only adapt to the metal bellows body 4 of different inner diameters, but also fine-tune the axial length according to the slight difference in the axial length of the metal bellows body 4. Specifically, the sleeve 322 at the bottom is movably mounted on the central shaft 31, and the movably mounted here means that the top support assembly 32 at the bottom is mounted on the bottom of the central shaft 31 through a limiting locking member 33. The limiting locking member 33 includes an adjusting hoop 331 arranged around the central shaft 31 and an adjusting bolt 332 that can lock or loosen the adjusting hoop 331 so that the adjusting hoop 331 is tightly held on the central shaft 31. The adjusting hoop 331 is fixed to the sleeve 322 at the bottom by a positioning bolt 333. When the axial position of the bottom support assembly is not good, the adjusting bolt 332 can be loosened to allow the adjusting clamp 331 to slide with the center axis 31, thereby driving the bottom sleeve 322 fixedly connected to the adjusting clamp 331 by the positioning bolt 333 to move upward or downward along the axial direction of the center axis 31. When it moves to the appropriate position of the center axis 31, the adjusting clamp 331 is tightened to the outer wall of the center axis 31 by tightening the adjusting bolt 332, thereby making the center support mechanism 3 highly applicable. Moreover, in order to support the metal bellows body 4 of different lengths, it is only necessary to replace the welding support tube 52, so as to realize different inner diameters and appropriately adjust the axial position of the support assembly 32 to achieve better support effect and better center axis conversion effect, and further cooperate with the welding of the metal bellows body 4 with the upper and lower flanges.

[0065] In addition, it should be noted that the limit locking member 33 in this embodiment is located at the bottom of the support assembly 32, which can fine-tune the distance between the bottom support assembly 32 and the top support assembly 32, thereby facilitating the support work of the metal bellows body 4 (within a certain range) with different axial lengths. This greatly improves the adaptability and reduces the cost of using the tooling. Previously, one tooling had one support shaft, but in this embodiment, one support assembly 23 can adapt to metal bellows bodies 4 of various sizes.

[0066] Here, it should also be noted that the inner diameter of the metal bellows body 4 with different inner diameters can be changed by the central support mechanism 3, and accordingly, the outer diameter also needs to be changed to adapt to the metal bellows body 4 with different diameters. The change of the outer diameter requires the diameter of the welding sleeve 51 and the welding support tube 52 of the external support mechanism 5 to be changed. When the welding sleeve 51 is replaced, the welding support tube 52 needs to be set to multiple petals to meet the needs of the metal bellows body 4 with different diameters.

[0067] Further, the displacement structure 321 includes a displacement sleeve 3211, a connection sleeve 3212 and a limit sleeve 3213, all of which are sleeved on the central shaft 31, and the connection sleeve 3212 is located between the displacement sleeve 3211 and the limit sleeve 3213. The displacement sleeve 3211 is located on the side of the central shaft 31 close to its end surface, and the displacement sleeve 3211 and the limit sleeve 3213 are both threadedly connected to the outer wall of the central shaft 31, and the upper and lower end surfaces of the connection sleeve 3212 are respectively against the end surfaces of the displacement sleeve 3211 and the limit sleeve 3213, and the outer wall of the connection sleeve 3212 is connected to the first connecting rod 324. By screwing the displacement sleeve 3211, the connection sleeve 3212 can be moved along the axial direction of the central shaft 31, thereby driving the supporting 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 also Figure 3 As shown, threads are provided on both ends of the circumferential surface of the central shaft 31, and the displacement sleeve 3211 and the limiting sleeve 3213 are connected by threads, and the limiting sleeve 3213 is provided with an annular step end face extending radially outward, which is used to abut the bottom end face of the connecting sleeve 3212 to prevent the connecting sleeve 3212 from sliding. Furthermore, both end faces of the central shaft 31 contain threaded holes, the threaded hole on the upper end face is used to connect the 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-matched, and the purpose of the clearance-matching is to prevent the displacement sleeve 3211 from rotating with it, and to ensure that it has a certain displacement in the axial direction. Specifically, the connection sleeve 3212 is driven to axially displace by tightening the displacement sleeve 3211, wherein the displacement of the connection sleeve 3212 is limited by the limit sleeve 3213, and the limit sleeve 3213 can ensure that it does not fall off the displacement sleeve 132; the displacement of the connection sleeve 3212 drives the first connecting rod 324 and the second connecting rod 325 to hinge and rotate on the waist-shaped support plate 3231, so that the angle between the first connecting rod 324 and the second connecting rod 325 becomes larger or smaller, thereby changing the radial displacement of the waist-shaped cushion block 3232 relative to the central axis 31, and then driving the displacement of the waist-shaped support plate 3231 and the waist-shaped cushion block 3232, and finally driving the rotation of the auxiliary transmission rod 326, so as to achieve the purpose of supporting the metal bellows body 4 with different inner diameters. And the purpose of setting the auxiliary transmission rod 326 is to adapt to the design of the waist-shaped cushion block 3232, thereby improving the supporting effect. Two additional sleeves 322 and auxiliary transmission rods 326 are provided to better cooperate with the supporting action of the supporting body 323, and to ensure the effective transmission of radial displacement, thereby improving the adjustment efficiency and quality of radial displacement. The waist-shaped support plate 3231 and the waist-shaped cushion block 3232 are connected by bolts, and the first connecting rod 324 and the second connecting rod 325, the auxiliary transmission rod 326, the connecting sleeve 3212 and the sleeve 322 are connected by connecting pins.

[0069] Further, there are multiple supporting bodies 323, preferably 3, and the three supporting bodies 323 are arranged at intervals along the circumference of the connecting sleeve 3212. During welding, the supporting body can be more evenly stressed and the effect is better.

[0070] It should be noted that there are three supporting units 14, which have a good supporting effect. It should be noted that both the connecting sleeve 3212 and the sleeve 322 are provided with a rotating support that rotates with the rotating connecting rod 141 and the auxiliary transmission rod 326.

[0071] Further, 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 close to the central axis 31 is connected to the hinge fulcrum, 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, and a slot is provided on the side of the waist-shaped pad 3232 away from the waist-shaped support plate 3231, and a pressure sensor 3233 is installed in the slot, and 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 in place with the metal bellows body 4 and to prevent the metal bellows body 4 from being damaged due to excessive supporting force. 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 material, which can prevent the inner part of the metal bellows body 4 from being damaged when supporting the metal bellows body 4, thereby protecting the metal bellows body 4. The waist-shaped support plate 3231 and the waist-shaped pad 3232 are detachably connected, which is convenient for installation and regular replacement of the waist-shaped pad 3232.

[0072] The pressure sensor 3233 is set to collect the supporting pressure between the waist-shaped supporting pad 3232 and the metal bellows body 4, and the central supporting mechanism 1 is judged according to the pressure whether it is supported in place and prevents the metal bellows body 4 from being damaged by excessive supporting force. At the same time, the signal of supporting in place is sent to the control center. After the control center receives the signal that the metal bellows body 4 is supported well, the control detection mechanism 8 collects the coordinate point where the central axis 31 is located.

[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 provided with annular positioning steps 511 at the upper and lower ends, respectively. The two welding support cylinders 52 can be inserted into the welding sleeve 51 and abut against the annular positioning steps 511, and the welding sleeve 51 and the welding support cylinder 52 are fixed by inserting the positioning pins 53 along the radial direction of the welding sleeve 51. The annular positioning steps 511 are provided to facilitate the axial positioning of the welding support cylinder 52.

[0074] Furthermore, the material of the welding sleeve 51 is aluminum, and the material of the welding support tube 52 is copper. The welding support tube 52 is changed to be made of a combination of multiple parts, the welding support block is made of copper, and the length adjustment block is made of aluminum, which is connected by the positioning pin 53, so that the copper part can be reduced, saving manufacturing costs. While reducing costs, the welding support tube 52 must be made of copper to ensure good thermal conductivity, and the positioning pin 53 connects the welding sleeve 51 and the welding support tube 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, the welding support tube 52 and the welding sleeve 51 are both formed by splicing a plurality of petal-shaped monomers, which are convenient for replacement and regular maintenance, and are easy to operate, and only the adjacent petals need to be removed. It should be noted that the adjacent petals can be positioned by existing bolt positioning pins.

[0076] Furthermore, the vertical mounting mechanism 2 includes a ram 21, and a sliding mounting plate 22 is slidably mounted on the ram 21 along its vertical direction, and 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 "L"-shaped bracket 23 facilitates the installation of the detection mechanism 8 and facilitates detection. When pressing, the "L"-shaped bracket 23 can be detached from the sliding mounting plate 22 to cooperate with the pressing work.

[0077] Further, the adjustment mechanism 9 includes a mounting ring 91 and a plurality of stepper motors 92 arranged at intervals in the circumferential direction of the mounting ring 91. The diameter of the mounting ring 91 is larger than 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 along the radial direction of the mounting ring 91 to push the upper flange 6 or the lower flange 7. The arrangement of the stepper motor 92 can control the upper and lower flanges more accurately.

[0078] Furthermore, it also includes a clamping mechanism 10. The clamping mechanism 10 can clamp the lower flange 7 after welding, and the top of the central support mechanism 3 is detachably connected with a pressing pipe 100 that can press toward the metal bellows body 4. Among them, the clamping mechanism 10 includes clamping members arranged at intervals along the circumference of the lower flange 7 of the welded metal bellows assembly, and the clamping member can move downward by screwing the nut so that the bottom end face of the clamping piece is clamped and fixed to the lower flange 7 to cooperate with the pressing process. The clamping mechanism is simple and convenient. In this embodiment, the welding platform is converted into an integrated welding and pressing platform. The existing welding and pressing are performed by two tools at two stations for welding and pressing respectively. When pressing metal bellows of different QD models, both sealing and length direction limitation must be ensured. The pressing tooling still has poor adaptability. One type of welding and pressing generally requires two sets of tools, and replacing the tooling will consume a lot of time and cost. Compared with the prior art, in this embodiment, pressure tests such as air tightness and pressure resistance can be directly performed after welding is completed, which reduces the time for changing tooling in different processes and integrates multi-size corrugated welding and pressure testing functions.

[0079] In this embodiment, the metal bellows body 4, the upper flange 6 and the lower flange 7 need to be welded first, and then cooled and pressed after welding. The specific welding process is: the coaxiality of the QD model metal bellows body 4 is confirmed by the central support mechanism 3, and 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, and the upper and lower flanges are adjusted by the adjustment mechanism 9 to align them with the position respectively, and the upper and lower flattened end waves 200 of the metal bellows body 4 are respectively against the upper flange 6 to be welded and the lower flange 7 to be welded by the welding support tubes 52 at the upper and lower ends of the external support mechanism 5, and the detection mechanism 8 and the "L"-shaped bracket 23 are welded at the same time.

[0080] After welding, a mounting flange 500 is set on the upper flange 6 and the mounting flange 500 is detachably connected to the welded upper flange 6 by means of locking bolts 300 and locking nuts 400. The pressure pipe 100 is fixed above the central axis 31 by means of a clamping block 600 and a clamping nut 700 at the top of the mounting flange 500, and the pressure pipe 100 is detachably mounted on the central axis 31. It should also be noted that after the pressure pipe 100 enters the welded metal bellows assembly, a pressure outlet is provided on the side wall of the pressure pipe 100, which can be pressurized toward the metal bellows assembly. The pressure interface of the pressure pipe 100 presses water pressure into the welded metal bellows body assembly, and the lower flange 7 and the base 1 are sealed respectively by means of sealing rings, and the length of the metal bellows body is limited by means of the central support mechanism 3, the upper flange 6 and the base 1, the clamping block 600 and the clamping nut 700 to prevent it from moving. The metal bellows body is axially limited by the clamping mechanism 10 to ensure the stability of the pressing.

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

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

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0085] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A multi-size bellows welding platform, characterized by: The invention comprises a base (1), wherein a vertical mounting mechanism (2) is arranged at one end of the top of the base (1), and a central supporting mechanism (3) is detachably mounted at the other end of the top of the base (1), wherein the central supporting mechanism (3) can extend outwardly along the radial direction of a metal bellows body (4) to be welded so as to abut against the inner wall of the metal bellows body (4) so ​​that the metal bellows body (4) and the central supporting mechanism (3) are coaxial, and an external supporting mechanism (5) is sleeved on the outside of the metal bellows body (4) to be welded, and the external supporting mechanism (5) can respectively abut the connecting pieces (41) at the upper and lower ends of the metal bellows body (4) against the upper flange (6) and the lower flange (7) to be welded; A detection mechanism (8) is detachably mounted on one side of the vertical mounting mechanism (2) close to the upper flange (6); an adjustment mechanism (9) is mounted 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 is capable of detecting the axis of the central support mechanism (3) and sending the coordinate information of the axis to a control center; the control center receives the coordinate information of the axis and controls the protruding 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.

2. The multi-size bellows welding platform according to claim 1, characterized in that: The central support mechanism (3) comprises a central shaft (31) and two top support assemblies (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 supporting assemblies (32) comprises a displacement structure (321), a connecting rod structure, a sleeve (322) and a supporting body (323); The displacement structure (321) and the sleeve (322) are both mounted on the central shaft (31), and the displacement structure (321) is threadedly connected to the central shaft (31), the sleeve (322) at the top is fixedly mounted on the central shaft (31), and the sleeve (322) at the bottom is movably mounted on the central shaft (31); The adjusting mechanism (9) is located on one side of the sleeve (322) close to the end of the central axis (31), and the displacement structure (321) can move closer to or farther away from the corresponding sleeve (322) along the axial direction of the central axis (31); The connecting rod structure comprises a first connecting rod (324) and a second connecting rod (325), one end of the first connecting rod (324) is hinged to the displacement structure (321), the other end of the first connecting rod (324) is hinged to one end of the second connecting rod (325) to form a hinge fulcrum, the hinge fulcrum is located on the top support body (323), the other end of the second connecting rod (325) is hinged to the corresponding sleeve (322), the displacement structure (321) can move axially along the central axis (31) to approach / move away from the sleeve (322), so that the connecting rod structure drives the top support body (323) to extend or retract along the radial direction of the central axis (31).

3. The multi-size bellows welding platform according to claim 2, characterized in that: The displacement structure (321) comprises a displacement sleeve (3211), a connection sleeve (3212) and a limit sleeve (3213) which are all sleeved on the central shaft (31), and the connection sleeve (3212) is located between the displacement sleeve (3211) and the limit sleeve (3213); The displacement sleeve (3211) is located on a side of the central shaft (31) close to its end surface, and the displacement sleeve (3211) and the limiting sleeve (3213) are both threadedly connected to the outer wall of the central shaft (31), the upper and lower end surfaces of the connecting sleeve (3212) are respectively abutted against the end surfaces of the displacement sleeve (3211) and the limiting sleeve (3213), and the outer wall of the connecting sleeve (3212) is connected to the first connecting rod (324); The displacement sleeve (3211) is screwed to enable the connection sleeve (3212) to move along the axial direction of the central axis (31), thereby driving the 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).

4. The multi-size bellows welding platform according to claim 3, characterized in that: The supporting body (323) comprises a waist-shaped supporting plate (3231), a waist-shaped cushion block (3232), and a pressure sensor (3233) located on the waist-shaped cushion block (3232); The side of the waist-shaped support plate (3231) close to the central axis (31) is connected to the hinge fulcrum, 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, and a slot 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 slot, the pressure sensor (3233) is electrically connected to the control center, and the pressure sensor (3233) is used to detect whether the waist-shaped pad (3232) is in place with the metal bellows body (4).

5. The multi-size bellows welding platform according to claim 2, characterized in that: The supporting assembly (32) at the bottom is installed on the bottom of the central shaft (31) via a limiting locking member (33); The position-limiting locking member (33) comprises an adjusting clamp (331) arranged around 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 sleeve (322) at the bottom are fixed by means of positioning bolts (333).

6. The multi-size bellows welding platform according to claim 2, characterized in that: The external support mechanism (5) comprises a welding sleeve (51) and a welding support cylinder (52) arranged at the upper and lower ends of the welding sleeve (51); The inner side walls of the welding sleeve (51) are respectively provided with annular positioning steps (511) at the top and bottom. The two welding support tubes (52) can be respectively inserted into the welding sleeve (51) and abut against the annular positioning steps (511). The welding sleeve (51) and the welding support tube (52) are fixed by being inserted along the radial direction of the welding sleeve (51) through positioning pins (53).

7. The multi-size bellows welding platform according to claim 1, characterized in that: The vertical mounting mechanism (2) comprises a slide (21), the slide (21) being slidably mounted with a sliding mounting plate (22) along its vertical direction, an "L"-shaped bracket (23) being detachably mounted on the sliding mounting plate (22), and the detection mechanism (8) being mounted on the "L"-shaped bracket (23).

8. The multi-size bellows welding platform according to claim 7, characterized in that: The adjustment mechanism (9) comprises a mounting ring (91) and a plurality of stepping motors (92) arranged at intervals in the circumferential direction of 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 stepping motor (92) can pass through the mounting ring (91) in the radial direction of the mounting ring (91) to push the upper flange (6) or the lower flange (7).

9. The multi-size bellows welding platform according to claim 8, characterized in that: The welding support tube (52) and the welding sleeve (51) are both formed by splicing a plurality of petal-shaped monomers.

10. The multi-size bellows welding platform according to claim 1, characterized in that: Also includes a clamping mechanism (10); The clamping mechanism (10) is capable of clamping the welded lower flange (7), and the top of the central support mechanism (3) is detachably connected with a pressing connecting pipe (100) capable of pressing toward the inside of the metal bellows body 4.

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