Gasket changing mechanism, welding system, and gasket changing method

Abstract

The present application provides a gasket changing mechanism, a welding system and a gasket changing method, wherein the gasket changing mechanism comprises a mandrel, a support arranged above the mandrel, a turnover frame arranged in the support, and at least two gaskets arranged on different sides of the turnover frame; the support is arranged to be capable of receiving and positioning the turnover frame in the inner side of the support when any side of the turnover frame provided with the gasket is arranged upward. In the gasket changing mechanism, the welding system and the gasket changing method provided by the present application, the mandrel does not need to be turned over during the gasket changing, the requirement for the rigidity of the mandrel is reduced, a large rotating driving mechanism for driving the mandrel to rotate is not needed, and the manufacturing cost of the welding system is saved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment, specifically to a gasket changing mechanism, a welding system, and a gasket changing method. Background Technology

[0002] The tank shell is one of the important components of a rocket booster. In actual production, when welding the longitudinal seams on cylindrical parts such as the tank shell, a single-sided welding and double-sided forming method is used. This requires a backing to be placed on the back of the weld. Furthermore, a different type of backing is needed when the welding device welds the longitudinal seams from the outside of the tank shell and from the inside of the tank shell.

[0003] In existing technologies, the gasket is generally fixed to one side of the mandrel. When changing the gasket, the old gasket is manually removed from the mandrel, and then a new gasket is installed. This method of switching between different types of gaskets is time-consuming. Existing technologies (such as patent CN215280562U) also disclose another method for changing the gasket: gaskets are provided on both the upper and lower sides of the mandrel. When a gasket needs to be replaced, the mandrel is flipped so that the gasket fixed on the other side faces upwards. However, this method has the following disadvantages: 1. The entire mandrel is flipped, requiring high rigidity; 2. A large rotation drive mechanism is needed to drive the mandrel to rotate; 3. The gasket is directly mounted on the mandrel, making insulation between them difficult and resulting in slow gasket heating. Summary of the Invention

[0004] The purpose of this invention is to provide a gasket changing mechanism, welding system and gasket changing method that can change the gasket without flipping the mandrel.

[0005] To achieve the above objectives, the present invention provides a pad changing mechanism, including a mandrel, a support disposed above the mandrel, a flipping frame installed in the support, and at least two pads disposed on different sides of the flipping frame. The support is configured such that when any side of the flipping frame with a pad is facing upward, the flipping frame can be installed inside and positioned therein.

[0006] The support includes a base body for supporting the flipping frame and a clamping structure disposed on both sides of the base body in the width direction. The clamping structure is used to clamp the flipping frame onto the base body of the support. The clamping structure includes an adjusting block whose position is adjustable in the vertical direction and a pressure plate connected to the adjusting block. The position of the pressure plate is adjustable in the direction from the adjusting block toward and away from the flipping frame. The flipping frame has a slot on the side near the pressure plate for the pressure plate to extend into.

[0007] The main body of the seat has a first sliding groove on the side near the adjusting block. The adjusting block is slidably disposed in the first sliding groove in the vertical direction. The adjusting block has a second sliding groove for the pressure plate to slide in the direction from which it approaches and moves away from the flipping frame. The pressure plate is slidably disposed in the second sliding groove.

[0008] Multiple supports are provided along the length of the spindle, and multiple adjustment blocks are also provided on both sides of the width of the flipping frame.

[0009] As a further improvement of the present invention, two pads are provided, which are respectively located on the upper and lower sides of the flipping frame and extend along the length direction of the mandrel.

[0010] As a further improvement of the present invention, the pad changing mechanism further includes an ejection assembly for ejecting the flipping frame from the support. The ejection assembly includes an ejection block located below the flipping frame and movable in the vertical direction. After the flipping frame is ejected from the support, it can be flipped relative to the ejection block.

[0011] As a further improvement of the present invention, the flipping frame includes a frame body and rolling shafts connected to both ends of the frame body in the length direction, the ejector block is located below the rolling shaft, and the ejector assembly further includes a first driving member disposed on the spindle to drive the ejector block to move in the up and down direction.

[0012] As a further improvement of the present invention, the liner changing mechanism also includes a plurality of heat insulation pads respectively disposed between each support and the mandrel.

[0013] As a further improvement of the present invention, the pad changing mechanism further includes a drive rod that can be slidably arranged along the length of the mandrel. The adjusting block is slidably connected to the seat body in the up-down direction. The drive rod and the multiple adjusting blocks located on the same side of the flipping frame among the multiple supports are respectively provided with a drive structure so that the sliding of the drive rod along the length of the mandrel can drive the multiple adjusting blocks to move up and down.

[0014] As a further improvement of the present invention, a receiving groove is provided on the side of the seat body near the flip frame. The receiving groove has two first inclined surfaces symmetrically arranged on both sides of the width direction of the seat body, and the distance between the two first inclined surfaces gradually increases from the seat body toward the flip frame. Second inclined surfaces matching the first inclined surfaces are provided at the four corners of the flip frame.

[0015] The present invention also provides a welding system, including a loading and unloading device, a column platform disposed opposite to the loading and unloading device in a first direction, and a welding device connected to the side of the column platform facing the loading and unloading device. The loading and unloading device includes a fixed base and a loading and unloading fixture rotatably connected to the fixed base and located on the side of the fixed base facing the column platform. The welding device includes the aforementioned liner changing mechanism, clamping mechanism, and welding mechanism.

[0016] The present invention also provides a method for changing a gasket, comprising the following steps:

[0017] Padding is provided on at least two different sides of the tilting frame;

[0018] Insert the flipping frame into the support located above the spindle, and set the padded side of the flipping frame upwards;

[0019] The beneficial effects of this invention are:

[0020] In the gasket changing mechanism, welding system and gasket changing method provided by the present invention, the mandrel does not need to be flipped during gasket changing, which reduces the requirement for mandrel rigidity and eliminates the need to set a large rotation drive mechanism to drive the mandrel to rotate, thus saving the manufacturing cost of the welding system. Attached Figure Description

[0021] In the picture:

[0022] Figure 1 This is a schematic diagram of the gasket changing mechanism provided by the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the central tilting frame and the padding installed on the tilting frame;

[0024] Figure 3 for Figure 1 A partial structural diagram of the middle liner changing mechanism;

[0025] Figure 4 for Figure 1 A front view structural diagram of the middle liner changing mechanism;

[0026] Figure 5 for Figure 1 Exploded view of another part of the middle liner changing mechanism;

[0027] Figure 6 for Figure 5 Schematic diagram of the structure of the adjusting block and the tablet press;

[0028] Figure 7 for Figure 1 Exploded view of another part of the middle liner changing mechanism;

[0029] Figure 8 for Figure 7 A schematic diagram of the structure of the adjusting block, the pressure plate, the drive rod, and the drive block;

[0030] Figure 9 for Figure 1 Structural diagram of the main body of the central seat, the tilting frame, and the padding;

[0031] Figure 10 This is a front view structural diagram of the welding system provided by the present invention;

[0032] Figure 11 for Figure 10 Schematic diagram of the welding device;

[0033] Figure 12 for Figure 10 Schematic diagram of the loading and unloading device;

[0034] Figure 13 for Figure 12 A partial structural diagram of the loading and unloading equipment;

[0035] Figure 14 for Figure 10 A front view schematic diagram of the welding device;

[0036] Figure 15 for Figure 14 A magnified structural diagram of point A in the middle;

[0037] Figure 16 A partial structural schematic diagram of the welding system provided by this invention;

[0038] Figure 17 for Figure 16 A cross-sectional schematic diagram of a portion of the Chinese fall protection mechanism;

[0039] Figure 18 for Figure 11 Schematic diagram of the clamping mechanism;

[0040] Figure 19 for Figure 11 A cross-sectional view of the clamping mechanism;

[0041] Figure 20 for Figure 19 A magnified structural diagram of point B in the middle;

[0042] Figure 21 for Figure 11 A partial structural diagram of the clamping mechanism. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0044] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0045] like Figure 1 and Figure 2 As shown, one embodiment of the present invention provides a gasket changing mechanism 30, which is suitable for switching different types of gaskets when performing internal and external welding on cylindrical parts such as rocket tank shells.

[0046] The pad changing mechanism 30 includes a spindle 31, a support 32 disposed on the spindle 31, a flipping frame 33 installed in the support 32, and at least two pads 34 disposed on different sides of the flipping frame 33. The support 32 is configured to be able to install and position the flipping frame 33 inside it when any side of the flipping frame 33 with the pads 34 is facing upward.

[0047] In this embodiment, when the pad changing mechanism 30 is in use, the side of the flipping frame 33 with the pad 34 faces upward. If the pad 34 needs to be changed, the operator can remove the flipping frame 33 from the support 32, then flip the flipping frame 33 so that the other side of the flipping frame 33 with the pad 34 faces upward, and then put it into the support 32.

[0048] Specifically, there are two pads 34. The two pads 34 are located on the upper and lower sides of the flipping frame 33 respectively, and extend along the length of the spindle 31. When changing the pads 34, the flipping frame 33 needs to be removed from the support 32, flipped 180° and then put back into the support 32.

[0049] Reference Figure 3As shown, the flipping frame 33 equipped with the pad 34 has a certain weight. In order to facilitate the operation of the operator, the pad changing mechanism 30 also includes an ejection component 35 for ejecting the flipping frame 33 from the support 32. The ejection component 35 includes an ejection block 351 located below the flipping frame 33 and movable in the vertical direction. The ejection block 351 moves upward to eject the flipping frame 33 out of the support 32. After the flipping frame 33 is ejected by the ejection block 351, it can be flipped relative to the ejection block 351. That is, after the flipping frame 33 is ejected from the support 32, the operator can flip the frame 33 so that the other side of the flipping frame 33 with the pad 34 is facing upward. Then the ejection block 351 descends and the flipping frame 33 is reinstalled into the support 32.

[0050] Specifically, the tilting frame 33 includes a frame body 331 and rolling shafts 332 connected to both ends of the frame body 331 along its length. An ejector block 351 is located below the rolling shafts 332. The ejector block 351 pushes the rolling shafts 332 to eject the entire tilting frame 33 from the support 32. A pad 34 is provided on the frame body 331. A limiting groove may be recessed on the side of the ejector block 351 facing the rolling shafts 332. When the ejector block 351 pushes the rolling shafts 332, the rolling shafts 322 fall into the limiting groove and can roll within it, facilitating the operator's tilting of the tilting frame 33. The sidewall of the limiting groove may be arc-shaped or V-shaped to limit the movement of the rolling shafts 332. The ejection assembly 35 also includes a first driving member 352 mounted on the spindle 31 for driving the ejector block 351 to move vertically. The first driving member 352 may be a telescopic driving member such as a cylinder.

[0051] Reference Figures 4 to 6 As shown, multiple supports 32 are provided along the length of the spindle 31, with a gap between each pair of supports 32. The multiple supports 32 can better fix the flipping frame 33 above the spindle 31 and better support the flipping frame 33. The pad changing mechanism 30 also includes multiple heat insulation pads 36 respectively provided between each support 32 and the spindle 31 to isolate the heat conduction between the spindle 31 and the support 32 when the pad 34 is heated.

[0052] The support 32 includes a base body 321 for supporting the tilting frame 33 and clamping structures on both sides of the base body 321 in the width direction. The clamping structures are used to press the tilting frame 33 onto the base body 321 of the support 32. The clamping structures include an adjusting block 3231 whose position is adjustable in the vertical direction and a pressure plate 3332 connected to the adjusting block 3231. The position of the pressure plate 3332 is adjustable in the direction from the adjusting block 3231 towards and away from the tilting frame 33. The tilting frame 33 has a slot 333 on the side near the pressure plate 3332 for the pressure plate 3332 to extend into. When the tilting frame 33 is in the clamped state, the pressure plate 3332 extends into the slot 333 and presses against the lower side wall of the slot 333, pressing the tilting frame 33 onto the base body 321. When the flipping frame 33 needs to be flipped, first adjust the pressure plate 3332 to move away from the flipping frame 33 to disengage from the slot 333. Then, after the flipping frame 33 is flipped, adjust the pressure plate 3332 to move closer to the flipping frame 33 to extend into the slot 333. Then adjust the adjusting block 3231 so that the pressure plate 3332 presses against the side wall of the slot 333 located below.

[0053] Preferably, there are two slots 333 spaced apart in the vertical direction, so as to correspond to the positions of the pressing plate 3332 relative to the flipping frame 33 before and after flipping.

[0054] In a preferred embodiment, the base body 321 has a first groove 3335 on the side near the adjusting block 3231. The adjusting block 3231 is slidably disposed in the first groove 3335 in the vertical direction. A threaded hole is provided on the side wall of the first groove 3335 near the adjusting block 3231. A first slot 3334 extending in the vertical direction is provided on the adjusting block 3231 corresponding to the threaded hole. In this way, fasteners such as screws 1211 can be connected to the threaded hole through the first slot 3334. When the screw does not press the adjusting block 3231 tightly onto the base body 321, the adjusting block 3231 can move up and down to a suitable position. Then, the screw is tightened to fix the adjusting block 3231 in this position, so as to realize the vertical adjustment of the adjusting block 3231.

[0055] The adjusting block 3231 is provided with a second slide groove 3337 for the pressure plate 3332 to slide in the direction of approaching and moving away from the flipping frame 33. The pressure plate 3332 is slidably disposed in the second slide groove 3337. A threaded hole is formed in the part of the pressure plate 3332 located in the second slide groove 3337. A screw is threaded into the threaded hole. The screw can tighten against the side wall of the second slide groove 3337 to fix the pressure plate 3332 in the slide groove and prevent it from sliding. A second slot 3336 is formed on the adjusting block 3231 corresponding to the threaded hole so that the screw can be inserted into the threaded hole.

[0056] Reference Figure 7 and Figure 8As shown, when the pad changing mechanism 30 of this embodiment includes multiple supports 32, multiple adjusting blocks 3231 are also provided on both sides of the width direction of the flipping frame 33. In order to facilitate the adjustment of multiple adjusting blocks 3231 located on the same side of the flipping frame 33, the pad changing mechanism 30 also includes a drive rod 37 that can be slidably arranged along the length direction of the spindle 31. The adjusting blocks 3231 are slidably connected to the seat body 321 in the up and down direction. The drive rod 37 is specifically slidably connected to a slide on one side of the seat body 321. A drive structure is provided between the drive rod 37 and the multiple adjusting blocks 3231 located on the same side of the flipping frame 33, so that the sliding of the drive rod 37 along the length direction of the spindle 31 can drive the multiple adjusting blocks 3231 to move up and down.

[0057] Specifically, the drive structure includes a guide groove 3333 formed on the adjusting block 3231 and a drive block 374 connected to the drive rod 37. The guide groove 3333 and the drive block 374 have mutually cooperating inclined surfaces to convert the movement of the drive rod 37 along the length of the spindle 31 into the movement of the adjusting block 3231 in the up-down direction. An operating part 371 can be connected to one side of the drive rod 37 so that the operator can pull the drive rod 37. A locking groove 372 and a locking block 373 can be provided between the drive rod 37 and the spindle 31. When the locking block 373 is inserted into the locking groove 372, the position of the drive rod 37 is fixed, and the positions of the multiple adjusting blocks 3231 are also fixed to press the flipping frame 33.

[0058] Reference Figure 9 As shown, the seat body 321 has a receiving groove 3211 on the side near the flipping frame 33. When the flipping frame 33 is installed into the support 32, it is partially accommodated in the receiving groove 3211. The receiving groove 3211 has two first inclined surfaces 3212 symmetrically arranged on both sides of the seat body 321 in the width direction, and the distance between the two first inclined surfaces 3212 gradually increases from the seat body 321 towards the flipping frame 33. The four corners of the flipping frame 33 are provided with second inclined surfaces 3311 that match the first inclined surfaces 3212. When the flipping frame 33 is partially accommodated in the receiving groove 3211, the second inclined surfaces 3311 and the first inclined surfaces 3212 are tightly fitted together under the action of the clamping structure, so that the first inclined surfaces 3212 play a role in centering the flipping frame 33, ensuring the positional accuracy of the flipping frame 33 during installation.

[0059] The present invention also provides a method for changing a gasket, which specifically includes the following steps:

[0060] Pads 34 are provided on at least two different sides of the tilting frame 33;

[0061] The flipping frame 33 is inserted into the support 32 located above the spindle 31, and the side of the flipping frame 33 with the pad 34 is set upward.

[0062] If the pad 34 needs to be changed, the flipping frame 33 is detached from the support 32 and flipped so that the other side of the flipping frame 33 with the pad 34 is facing upward and installed into the support 32.

[0063] In the above steps, two pads 34 are preferably provided, and the two pads 34 have different shapes and are respectively provided on the upper and lower sides of the flipping frame 33. Multiple supports 32 are preferably provided, and there is a gap between the multiple supports 32. A heat insulation pad 36 is provided between each support and the spindle.

[0064] In summary, the gasket changing mechanism 30 and gasket changing method provided by the present invention have the following advantages:

[0065] When the gasket 4 is changed, the mandrel 31 does not need to be flipped, which reduces the rigidity requirement of the mandrel 31 and eliminates the need to set a large rotation drive mechanism to drive the mandrel 31 to rotate, thus saving the manufacturing cost of the welding system.

[0066] In addition, the gasket 34 is mounted on the support 32, and a heat insulation pad 36 is provided between the support 32 and the mandrel 31. When the gasket 34 is heated, the heat conduction between the gasket 34 and the mandrel 31 is reduced, which shortens the heating time required for the gasket 34 during welding.

[0067] Reference Figures 10 to 14 As shown. The present invention also provides a welding system, including a loading / unloading device 100, a column platform 200 disposed opposite to the loading / unloading device 100 in a first direction, and a welding device 300 connected to the column platform 200 on the side facing the loading / unloading device 100. The loading / unloading device 100 includes a fixed base 11 and a loading / unloading fixture 12 rotatably connected to the fixed base 11 and located on the side of the fixed base facing the column platform 200. The welding device includes the aforementioned liner changing mechanism 30, clamping mechanism 40, and welding mechanism 50. It should be noted that in this embodiment, the first direction is... Figure 10 The left and right directions.

[0068] Reference Figure 12 As shown, the loading and unloading device 100 includes a fixed base 11 and a loading and unloading fixture 12 rotatably connected to the fixed base 11 and located on the side of the fixed base 11 facing the column platform 200. The loading and unloading fixture 12 is used to fix multiple arc-shaped wall panels 15 so that these arc-shaped wall panels 15 are spliced ​​into a cylindrical body on the loading and unloading fixture 12. The axis of the loading and unloading fixture 12 extends along a first direction, and multiple fixing parts 121 arranged along its circumference are provided on both sides of the loading and unloading fixture 12 in the first direction. The multiple fixing parts 121 can fix the two ends of the multiple arc-shaped wall panels 15 to fix the multiple arc-shaped wall panels 15 on the loading and unloading fixture 12.

[0069] Specifically, the loading / unloading fixture 12 includes two support portions 122 arranged opposite to each other in a first direction. Each support portion 122 is annular or consists of multiple arc-shaped strips extending along the circumference of the loading / unloading fixture 12. Multiple fixing portions 121 are respectively disposed on the two support portions 122. When the arc-shaped wall panel 15 is fixed to the loading / unloading fixture 12, its end position is pressed against the support portion 122 by the fixing portions 121, and the fixing portions 121 are also engaged on both sides of the arc-shaped wall panel 15 along its length to prevent movement of the arc-shaped wall panel 15 in the first direction. The annular support portion 122 and the curved shape of the arc-shaped strips should match the curved shape of the arc-shaped wall panel 15.

[0070] Furthermore, the two supporting parts 122 are slidably disposed relative to each other in the first direction, meaning the distance between the plurality of fixing parts 121 respectively disposed on the two supporting parts 122 can be changed. This facilitates the loading and unloading of the arc-shaped wall panel 15 into the loading and unloading fixture 12 and its removal from the loading and unloading fixture 12, and allows the loading and unloading fixture 12 to adapt to arc-shaped wall panels 15 of different lengths. In a specific configuration, one of the two supporting parts 122 is annular, and the other is a plurality of arc-shaped strips extending along the circumference of the loading and unloading fixture 12. The loading and unloading fixture 12 also includes a plurality of sliding frames extending from the annular supporting part 122 toward the arc-shaped strips, and each arc-shaped strip is slidably connected to the corresponding sliding frame along the first direction.

[0071] In this embodiment, the fixing part 121 includes a first fixing part and a second fixing part. The first fixing part is a first fastener 1211 detachably connected to the bearing part 122. The second fixing part includes a second fastener 1212 detachably connected to the bearing part 122 and a pressure plate 1213 connected to the second fastener 1212.

[0072] The first fastener 1211 can be a standard locating pin available on the market. An opening is provided on the bearing portion 122, and the first fastener 1211 is fixed within the opening. The first fastener 1211 can be engaged on both sides of the arc-shaped wall panel 15 along its length to prevent the arc-shaped wall panel 15 from moving along the first direction. The second fixing portion includes a second fastener 1212 detachably connected to the bearing portion 122 and a pressure plate 1213 connected to the second fastener 1212. The pressure plate 1213 can press against the arc-shaped wall panel 15 under the action of the second fastener 1212, pressing the arc-shaped wall panel 15 tightly onto the bearing portion 122. The second fastener 1211 can also be the aforementioned locating pin. After welding is completed, the operator removes the first and second fixing portions from the bearing portion 122, allowing the cylinder to be removed from the loading and unloading fixture 12.

[0073] The welding system also includes a base 13 disposed below the loading and unloading device 100. A fixed seat 11 is slidably connected to the base 13 along a first direction, meaning the fixed seat 11 can move along the first direction away from or towards the welding device 300, facilitating the operator to fix the arc-shaped wall panel 15 onto the loading and unloading fixture 12 and to remove the welded cylinder from the loading and unloading fixture 12. The welding system also includes a loading and unloading cart 14, which is used to load the arc-shaped wall panel 15 under the loading and unloading fixture 12, and to receive the welded cylinder from the loading and unloading fixture 12 and transport the cylinder away, thereby reducing the labor intensity of the operator.

[0074] The welding apparatus 300 includes a gasket changing mechanism 30, a clamping mechanism 40 located above the gasket 34, and a welding mechanism 50. The extending directions of the gasket changing mechanism 30, the clamping mechanism 40, and the welding mechanism 50 are the same as the extending direction of the longitudinal seam, and all extend along the first direction. The welding mechanism 50 includes a first crossbeam 51 and a welding torch assembly 52 that slides along the first crossbeam 51 in the first direction. The welding apparatus 300 uses a single-sided welding and double-sided forming method to weld the longitudinal seam formed between two adjacent arc-shaped wall panels 15. During welding, the gasket 34 is located on the back of the longitudinal seam, and the longitudinal seam is aligned with the centerline of the weld groove opened on the gasket 24. The clamping mechanism 40 is used to clamp the two sides of the longitudinal seam, and the welding torch assembly 52 moves along the first direction to weld the longitudinal seam. After welding one longitudinal seam, the loading and unloading fixture 12 rotates, allowing the welding apparatus 300 to weld another longitudinal seam. Taking a cylinder composed of four arc-shaped wall panels 15 as an example, the welding device 300 welds the four longitudinal seams in sequence to weld the four arc-shaped wall panels 15 into a cylinder.

[0075] The first crossbeam 51 has a first connecting portion 53 and a second connecting portion 54 arranged opposite each other in a first direction, and an intermediate connecting portion 55 rotatably connected to the second connecting portion 54. The first connecting portion 53 is fixedly connected to the clamping mechanism 40, and the intermediate connecting portion 55 is slidably connected to the clamping mechanism 40 in the first direction. When the welding torch assembly 52 is welding, the heat generated is conducted to the first crossbeam 51. The sliding connection between the intermediate connecting portion 55 and the clamping mechanism 40 can release the deformation stress generated by the heating of the first crossbeam 51, thereby preventing the bending deformation of the first crossbeam 51 from affecting the movement accuracy of the welding torch assembly 52.

[0076] Reference Figure 15As shown, the welding device 300 further includes a connecting seat 60 slidably connected to the column base 200 in the vertical direction. The clamping mechanism 40 and the liner changing mechanism 30 are connected to the connecting seat 60. The welding system also includes a driving assembly 90 disposed between the column base 200 and the connecting seat 60 for driving the connecting seat 60 to slide vertically. The welding device 300 slides vertically, cooperating with the movement of the fixed seat 11 in the first direction, allowing the welding device 300 to weld the longitudinal seam from the outside or inside of the cylinder. When the welding device 300 is in the upper position, the welding mechanism 50 and the clamping structure 40 are outside the cylinder, and the liner 34 is inside the cylinder. In this case, the welding device 300 welds the longitudinal seam from the outside of the cylinder. When the welding device 300 is in the lower position, the welding mechanism 50 and the clamping structure 40 are inside the cylinder, and the liner 34 is outside the cylinder. In this case, the welding device 300 welds the longitudinal seam from the inside of the cylinder. When the welding device 300 welds the longitudinal seam from the inside and outside of the cylinder, different types of gaskets 34 are required. Therefore, the upper gasket changing mechanism 30 is used to change the gasket.

[0077] Continue to cooperate with reference Figure 16 and Figure 17 As shown, the welding system also includes a fall protection mechanism 80. The fall protection mechanism 80 includes a plurality of locking grooves 81 arranged vertically on the side of the column base 200 near the connecting seat 60, and a stop part 82 connected to the side of the connecting seat 60 near the column base 200. The stop part 82 has a locking block 821. When the connecting seat 60 falls, the locking block 821 can extend into the locking groove 81 to prevent the connecting seat 60 from falling further.

[0078] As a preferred embodiment, the drive assembly 90 includes sprockets disposed on the upper and lower sides of the column base 200, a drive motor 91 for driving the sprockets to rotate, and chains 92 correspondingly connected to the two sprockets. The stop part 82 includes a connecting block 822 connected to the connecting seat 60, a locking block 821 rotatably connected to the connecting block 822, and an elastic part 823 abutting against the side of the locking block 821 away from the locking groove 81. The locking block 821 has a bottom corner near the locking groove 81, and the bottom corner can extend into the locking groove 81 as the locking block 821 rotates. The top of the locking block 821 is connected to the first link of the chain 92, and the connecting seat 90 is connected to the second link located below the first link.

[0079] When the welding device 300 is working, the drive motor 91 drives the sprocket to rotate, the sprocket drives the chain 92 to move, and the chain 92 drives the connecting seat 60 to move up and down. When the chain 92 is not broken, the chain 92 located above the locking block 821 pulls the locking block 821, and the bottom corner will not extend into the locking groove 81. When the connecting seat 60 falls, that is, when the chain 92 breaks, the tension of the chain 92 disappears, and the elastic part 823 forces the locking block 821 to rotate, so that the bottom corner extends into the locking groove 81, preventing the connecting seat 60 from falling further.

[0080] Reference Figures 18 to 21 As shown, the clamping mechanism 40 includes a second crossbeam 41, two sets of pressure finger assemblies 42 symmetrically arranged on both sides of the width direction of the second crossbeam 41 and arranged along a first direction. The two sets of pressure finger assemblies 42 are openable and closable on the second crossbeam 41. The clamping mechanism 40 also includes an airbag assembly 43 disposed above each set of pressure finger assemblies 42, an elastic element (not shown) disposed between the crossbeam and the pressure finger assemblies 42, and a pressing screw 44 threadedly connected to the second crossbeam 41 and located above the pressure finger assemblies 42. When the clamping mechanism 40 is working, the airbag assembly 43 inflates, causing the two sets of pressure finger assemblies 42 to open, clamping both sides of the longitudinal seam and making the weld seam fit against the gasket 34. At this time, the pressing screw 44 can press against the pressure finger assembly 42, allowing the airbag assembly 43 to retract. After welding is completed, the pressing screw 44 releases its pressure on the pressure finger assembly 42, and the elastic element resets the two sets of pressure finger assemblies 42.

[0081] Specifically, the second crossbeam 41 has two slots 411 arranged opposite each other in its width direction. A push block 45 is disposed within each slot 411. The push block 45 has a first side 451 and a second side 452 perpendicular to the first side 451. The first side 451 is attached to the upper wall of the slot 411. The finger press assembly 42 includes a piano key 421 and finger presses 422 connected to the head of the key 421. The tail of the key 421 has spherical surfaces on both sides that contact the first side 451 and the lower wall of the slot 411. The clamping mechanism 40 has limiting blocks arranged opposite each other in the first direction to limit the movement of each group of finger press assemblies 42, so that the finger press assemblies 42 forming each group of finger press assemblies 42 are tightly arranged together. With this design, each finger press assembly 42 can be rotated relative to the second crossbeam 41, allowing the two groups of finger press assemblies 42 to open or close.

[0082] The second crossbeam 41 is also provided with an adjusting screw 46. The adjusting screw 46 is threaded to the side of the second side 452 away from the pressure finger assembly 42 to press against the second side 452. By adjusting the adjusting screw 46, the position of the push block 45 in the slot 411 can be changed, thereby adjusting the distance between the two sets of pressure finger assemblies 42 so that the two sets of pressure finger assemblies 42 can weld cylinders of different thicknesses.

[0083] The piano key 421 has an opening, and the finger pressing assembly 42 also includes a first connecting shaft 47 that passes through the opening laterally. The first crossbeam 51 is located above the first connecting shaft 47 and has a second connecting shaft 48 that extends in a first direction. The elastic element connects the first connecting shaft 47 and the second connecting shaft 48. Here, the elastic element can be a tension spring or an elastic rope.

[0084] Back Figure 11The welding apparatus 300 also includes a locking mechanism 70, which includes a locking part 71 located at one end of the pad changing mechanism 30, a driving part 72 fixed to the clamping mechanism 40, and a locking part 73 linked to the driving part 72. The locking part 73 has an engaged state that engages with the locking part 71 and a disengaged state that separates from the locking part 71. The driving part 72 drives the locking part 73 to rotate, so that the locking part 73 switches between the engaged state and the disengaged state. The welding system includes a control unit, and the driving part 72 and the airbag assembly 43 are electrically connected to the control unit. After the control unit determines that the locking part 71 is in the engaged state, it controls the airbag assembly 43 to drive the pressure finger assembly 42 to open, ensuring safety during welding.

[0085] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0086] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A liner changing mechanism, characterized in that, It includes a spindle, a support disposed above the spindle, a flipping frame installed in the support, and at least two pads disposed on different sides of the flipping frame. The support is configured to allow the flipping frame to be installed and positioned inside it when any of the padded sides of the flipping frame is facing upwards. The support includes a base body for supporting the flipping frame and a clamping structure disposed on both sides of the base body in the width direction. The clamping structure is used to clamp the flipping frame onto the base body of the support. The clamping structure includes an adjusting block whose position is adjustable in the vertical direction and a pressure plate connected to the adjusting block. The position of the pressure plate is adjustable in the direction from the adjusting block toward and away from the flipping frame. The flipping frame has a slot on the side near the pressure plate for the pressure plate to extend into. The main body of the seat has a first sliding groove on the side near the adjusting block. The adjusting block is slidably disposed in the first sliding groove in the vertical direction. The adjusting block has a second sliding groove for the pressure plate to slide in the direction from which it approaches and moves away from the flipping frame. The pressure plate is slidably disposed in the second sliding groove. Multiple supports are provided along the length of the spindle, and multiple adjustment blocks are also provided on both sides of the width of the flipping frame.

2. The liner changing mechanism according to claim 1, characterized in that, Two pads are provided, which are located on the upper and lower sides of the flipping frame and extend along the length of the spindle.

3. The liner changing mechanism according to claim 1 or 2, characterized in that, The padding changing mechanism also includes an ejection assembly for ejecting the tilting frame from the support. The ejection assembly includes an ejection block located below the tilting frame and movable in the vertical direction. After the tilting frame is ejected from the support, it can be flipped relative to the ejection block.

4. The liner changing mechanism according to claim 3, characterized in that, The tilting frame includes a frame body and rolling shafts connected to both ends of the frame body in the length direction. The ejector block is located below the rolling shafts. The ejector assembly also includes a first driving member disposed on the spindle to drive the ejector block to move in the vertical direction.

5. The liner changing mechanism according to claim 1, characterized in that, The liner changing mechanism also includes multiple heat insulation pads respectively disposed between each support and the mandrel.

6. The liner changing mechanism according to claim 5, characterized in that, The pad changing mechanism also includes a drive rod that can be slidably arranged along the length of the mandrel. The adjusting block is slidably connected to the seat body in the up-down direction. The drive rod and the multiple adjusting blocks located on the same side of the flipping frame among the multiple supports are respectively provided with a drive structure so that the drive rod can drive the multiple adjusting blocks to move up and down when sliding along the length of the mandrel.

7. The liner changing mechanism according to claim 5, characterized in that, The seat body has a receiving groove on the side near the flip frame. The receiving groove has two first inclined surfaces symmetrically arranged on both sides of the seat body in the width direction. The distance between the two first inclined surfaces gradually increases from the seat body toward the flip frame. The four corners of the flip frame are provided with second inclined surfaces that match the first inclined surfaces.

8. A welding system, characterized in that, The device includes a loading and unloading device, a column platform disposed opposite to the loading and unloading device in a first direction, and a welding device connected to the side of the column platform facing the loading and unloading device. The loading and unloading device includes a fixed base and a loading and unloading fixture rotatably connected to the fixed base and located on the side of the fixed base facing the column platform. The welding device includes a liner changing mechanism, a clamping mechanism, and a welding mechanism as described in any one of claims 1 to 7.

9. A method for changing the shape of a gasket, characterized in that, Includes the following steps: Padding is provided on at least two different sides of the tilting frame; Insert the flipping frame into the support located above the spindle, and set the padded side of the flipping frame upwards; If the padding needs to be changed, the flipping frame is detached from the support and flipped so that the other side of the flipping frame with the padding is facing upwards and inserted into the support.

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