Fixing device for corrugated pipe welding

Abstract

The invention provides a fixing device for corrugated pipe welding, which belongs to the technical field of corrugated pipe welding and comprises a flange fixing mechanism and a corrugated pipe fixing mechanism. The flange fixing mechanism is arranged on the rack; the corrugated pipe fixing mechanism comprises a mounting seat, a positioning rod and a plurality of fixing assemblies; the mounting seat is arranged on the rack; one end of the positioning rod is rotationally connected with the mounting seat; a fixing cavity and a plurality of fixing holes are formed in the positioning rod, a pressurizing hole is formed in the fixing cavity, and a pressurizing assembly is arranged in the pressurizing hole; a pressurizing medium is arranged in the fixed cavity; the multiple fixing holes are formed in the length direction of the positioning rod and communicate with the fixing cavity. The corrugated pipe is sleeved on the positioning rod; the fixing assembly is slidably connected with the inner wall of the fixing hole. According to the fixing device for corrugated pipe welding, the pressurizing assembly is controlled to apply pressure to the interior of the fixing cavity, the pressurizing medium pushes the fixing assembly to move, and then the fixing assembly extrudes the outwards-protruding inner wall of the corrugated pipe, so that the corrugated pipe is fixed, and the corrugated pipe is prevented from shaking in the welding process.

Description

Technical Field

[0001] The invention belongs to the technical field of fixing devices for bellows welding, and in particular relates to a fixing device for bellows welding. Background Art

[0002] A bellows is a cylindrical thin-walled elastic shell with multiple transverse corrugations. It can expand and contract axially and is mainly used to compensate for the displacement of the pipeline system caused by temperature changes, mechanical vibrations and other factors. It is widely used in many industrial fields such as chemical industry, petroleum, electricity, aerospace, etc. At present, the connection of the bellows is mainly to weld the left flange and the right flange to the left and right ends of the bellows respectively, and then fix the flanges. In the prior art, the welding and fixing of the bellows and the flange usually relies on external clamps or supporting structures. These structures can often only play a simple supporting role. Due to the soft characteristics of the bellows, the bellows are prone to shaking during welding, which in turn affects the welding quality. Summary of the invention

[0003] The embodiment of the present invention provides a fixing device for bellows welding, so as to solve the technical problem in the prior art that the bellows is prone to shaking during welding.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a fixing device for bellows welding, comprising a flange fixing mechanism and a bellows fixing mechanism installed on a frame; the flange fixing mechanism is located below the welding mechanism, and the bellows fixing mechanism is located on one side of the flange fixing mechanism; The bellows fixing mechanism is arranged on the frame and is located on one side of the flange fixing mechanism; the bellows fixing mechanism comprises a mounting seat, a positioning rod and a plurality of fixing components; the mounting seat is arranged on the frame and has the freedom to move along the frame toward or away from the flange fixing mechanism; one end of the positioning rod is rotatably connected to the mounting seat, and the other end is arranged toward the flange fixing mechanism; a fixing cavity and a plurality of fixing hole groups are provided on the positioning rod, a pressurizing port is provided in the fixing cavity, and a pressurizing rod is provided at the pressurizing port; a pressurizing medium is provided in the fixing cavity; A plurality of fixing hole groups are arranged along the length direction of the positioning rod, and the fixing hole groups are a plurality of fixing holes arranged circumferentially along the positioning rod, and a plurality of the fixing holes are connected to the fixing cavity; a bellows is sleeved on the positioning rod; a plurality of fixing components are respectively arranged in the plurality of fixing holes, and are slidingly connected to the inner walls of the fixing holes; the pressurizing rod is pushed to move toward the fixing cavity, and the pressurized medium squeezes the fixing components, and the plurality of fixing components move toward the direction close to the bellows under the action of pressure and squeeze the convex inner wall of the bellows, thereby fixing the bellows.

[0005] In a possible implementation, the fixing assembly includes a fixing rod and a fixing plate; the fixing rod is slidably connected to the fixing hole; the fixing plate is fixed to one end of the fixing rod and is located in the fixing cavity.

[0006] In a possible implementation, the fixing assembly further includes an elastic member; the elastic member is sleeved on the fixing rod, and two ends of the elastic member are respectively connected to the fixing plate and the inner wall of the fixing cavity.

[0007] In a possible implementation, a rotating disk is provided on the mounting seat, and the rotating disk is rotatably connected to the mounting seat; one end of the positioning rod is fixedly connected to the rotating disk; a plurality of claws and a power assembly are provided on the rotating disk, and the plurality of claws are arranged circumferentially along the positioning rod, and are all transmission-connected to the power assembly; the claw has the function of clamping or loosening the right flange by moving along the rotating disk toward or away from the positioning rod.

[0008] In a possible implementation, the rotating disk is provided with a plurality of power chambers and a plurality of pressure holes connected to the power chambers, and one end of the pressure holes is connected to the fixed chamber; a plurality of limiting long holes connected to the power chamber are provided at one end of the rotating disk close to the bellows; the clamping claw is slidably connected to the inner wall of the limiting long hole; the power assembly includes a pushing member and a driving member; the pushing member is slidably connected to the inner wall of the pressure hole, and one end extends into the power chamber; the driving member is arranged in the power chamber and is transmission-connected to the pushing member, and the driving member is transmission-connected to the clamping claw.

[0009] In a possible implementation, the pushing member includes a power rod and a slide plate; the power rod is arranged in the pressure hole, and one end of the power rod passes through the pressure hole and extends into the power cavity; a plurality of gear teeth are provided on the power rod; the slide plate is arranged at one end of the power rod and is slidingly connected to the inner wall of the pressure hole; the driving member includes a rack and a gear; the rack is vertically arranged at one end of the claw; the gear is arranged in the power cavity and is rotatably connected to the inner wall of the power cavity, the gear is located between the rack and the power rod, and the gear is meshed with the rack and the plurality of gear teeth.

[0010] In a possible implementation, a limit plate is further provided in the pressure hole, and the limit plate is fixedly connected to the inner wall of the pressure hole; one end of the power rod passes through the limit plate; a reset member is sleeved on the power rod, and both ends of the reset member are respectively connected to the limit plate and the slide plate.

[0011] In a possible implementation, the fixing device for corrugated pipe welding further includes a driving assembly; the driving assembly is disposed on a frame and is transmission-connected to the mounting seat for driving the mounting seat to move.

[0012] In one possible implementation, the driving assembly includes a slide rail and a pusher provided on a frame; the length direction of the slide rail is arranged toward the flange fixing mechanism, and the mounting seat is slidably connected to the slide rail; the free end of the pusher is connected to the mounting seat transmission rod for driving the mounting seat to move.

[0013] In one possible implementation, the flange fixing mechanism includes a support frame, a driver and a chuck; the support frame and the driver are arranged on a frame; the chuck is arranged on the support frame and is used to clamp the flange; the chuck is rotatably connected to the support frame; the free end of the driver is transmission-connected to the chuck and is used to drive the chuck to rotate.

[0014] The beneficial effects of a fixing device for welding a bellows provided by the present invention are as follows: compared with the prior art, when the fixing device for welding a bellows provided by the present invention is used, the bellows is sleeved on the positioning rod of the bellows fixing mechanism, and the pressurizing component pressurizes the fixing cavity through the pressurizing hole; since the fixing component is slidably connected to the fixing hole, the fixing component moves toward the direction close to the inner wall of the bellows under the action of the pressure of the pressurized medium and squeezes the convex inner wall of the bellows; since a plurality of fixing hole groups are arranged along the length direction of the positioning rod, and the fixing hole groups are a plurality of fixing holes arranged circumferentially along the positioning rod, the bellows is fixed with the aid of a plurality of fixing components; after the bellows is fixed on the positioning rod, the flange fixing mechanism fixes the flange, and the control mounting seat The positioning rod and the bellows are driven to move toward the direction close to the flange, so that one end of the bellows is inserted into the flange, and the flange fixing mechanism drives the flange and the positioning rod to rotate, so that the welding mechanism welds the flange to the bellows; when the bellows needs to be removed, the pressurizing component releases pressure through the pressurizing hole, so that the fixing component retracts into the fixing hole, thereby loosening the bellows; in this way, with the help of the fixing cavity in the positioning rod, the fixing hole connected to the fixing cavity, and the fixing component slidably connected to the fixing hole, the pressurizing component is controlled to apply pressure toward the fixing cavity, and the pressurized medium pushes the fixing component to move, so that the fixing component squeezes the convex inner wall of the bellows, thereby fixing the bellows and preventing the bellows from shaking due to its own soft characteristics during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a fixing device provided in an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 A schematic diagram of the structure of a bellows fixing mechanism provided in an embodiment of the present invention; Figure 4 for Figure 3 The enlarged view of point B in the middle; Figure 5 Schematic diagram of the connection between the pressurizing component and the power component provided in the embodiment of the present invention Figure 1 ; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 Schematic diagram of the connection between the pressurizing component and the power component provided in the embodiment of the present invention Figure 2 ; Figure 8 for Figure 7 The enlarged view of point D in the middle; Fig. 9 A schematic diagram of the connection between the rotating disk and the power assembly provided by an embodiment of the present invention; Fig.10 A schematic diagram of the connection between the right flange and the claw provided in an embodiment of the present invention; Fig.11 This is a schematic diagram of the connection between the welding device and the fixing device provided in an embodiment of the present invention.

[0017] Among them, the reference numerals in the figure are: 1. Frame; 2. Flange fixing mechanism; 21. Support frame; 22. Driver; 23. Chuck; 3. Bellows fixing mechanism; 31. Mounting seat; 32. Positioning rod; 321. Fixing cavity; 322. Fixing hole; 323. Pressurizing hole; 324. Pressurized medium; 33. Fixing assembly; 331. Fixing rod; 332. Fixing plate; 333. Elastic member; 34. Pressurizing assembly; 341. Pressurizing plate; 342. Pressure rod; 4, rotating disk; 41, claw; 42, power assembly; 421, power rod; 422, slide plate; 423, gear; 424, rack; 425, gear; 426, reset member; 43, power chamber; 44, pressure hole; 441, limit plate; 45, limit long hole; 5, driving assembly; 51, slide rail; 52, pusher; 6, left flange; 7, right flange; 8, welding mechanism; 9, bellows. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, 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 the indicated technical features. Therefore, the features defined as "first" and "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.

[0022] See also Figures 1 to 11 , the bellows welding fixing device provided by the present invention is now described. A bellows welding fixing device comprises a flange fixing mechanism 2 and a bellows fixing mechanism 3 installed on a frame 1; the flange fixing mechanism 2 is located below the welding mechanism 8, and the bellows fixing mechanism 3 is located on one side of the flange fixing mechanism 2; the bellows fixing mechanism 3 comprises a mounting seat 31, a positioning rod 32 and a plurality of fixing components 33; the mounting seat 31 is arranged on the frame 1, and has the freedom to move along the frame 1 toward or away from the flange fixing mechanism 2; one end of the positioning rod 32 is rotatably connected to the mounting seat 31, and the other end is arranged toward the flange fixing mechanism 2; a fixing cavity 321 and a plurality of fixing hole groups are provided on the positioning rod 32, and a pressurizing hole 323 is provided in the fixing cavity 321, and the pressurizing hole 323 A pressurizing component 34 is provided inside; a pressurizing medium 324 is provided in the fixing cavity 321; a plurality of fixing hole groups are arranged along the length direction of the positioning rod 32, and the fixing hole groups are a plurality of fixing holes 322 arranged circumferentially along the positioning rod 32, and a plurality of fixing holes 322 are connected to the fixing cavity 321; the bellows 9 is sleeved on the positioning rod 32; a plurality of fixing components 33 are respectively provided in the plurality of fixing holes 322, and are slidably connected to the inner walls of the fixing holes 322; the pressurizing component 34 is controlled to apply pressure toward the fixing cavity 321, and the pressurizing medium 324 squeezes the fixing components 33, and the plurality of fixing components 33 move toward the direction close to the bellows 9 under the action of pressure and squeeze the protruding inner wall of the bellows 9, thereby fixing the bellows 9.

[0023] Compared with the prior art, the bellows welding fixing device provided in the present embodiment is that, when in use, the bellows 9 is sleeved on the positioning rod 32 of the bellows fixing mechanism 3, and the pressurizing component 34 pressurizes the fixing cavity 321 through the pressurizing hole 323; since the fixing component 33 is slidably connected with the fixing hole 322, the fixing component 33 moves toward the direction close to the inner wall of the bellows 9 under the action of the pressure of the pressurized medium 324 and squeezes the convex inner wall of the bellows 9; since a plurality of fixing hole groups are arranged along the length direction of the positioning rod 32, and the fixing hole groups are a plurality of fixing holes 322 arranged circumferentially along the positioning rod 32, the bellows 9 is fixed with the help of a plurality of fixing components 33; after the bellows 9 is fixed on the positioning rod 32, the flange fixing mechanism 2 fixes the flange, and the control mounting seat 31 drives the positioning rod 32 and the bellows The tube 9 moves toward the direction close to the flange, so that one end of the bellows 9 is inserted into the flange, and the flange fixing mechanism 2 drives the flange and the positioning rod 32 to rotate, so that the welding mechanism 8 welds the flange to the bellows 9; when the bellows 9 needs to be removed, the pressurizing component 34 releases pressure through the pressurizing hole 323, so that the fixing component 33 retracts into the fixing hole 322, thereby loosening the bellows 9; in this way, with the help of the fixing cavity 321 in the positioning rod 32, the fixing hole 322 connected to the fixing cavity 321, and the fixing component 33 slidably connected to the fixing hole 322, the pressurizing component 34 is controlled to apply pressure toward the fixing cavity 321, and the pressurized medium 324 pushes the fixing component 33 to move, so that the fixing component 33 squeezes the convex inner wall of the bellows 9, thereby fixing the bellows 9 and preventing the bellows 9 from shaking due to its own soft characteristics during welding.

[0024] See also Figures 1 to 4 As a specific embodiment of the fixing device for bellows welding provided by the present invention, the fixing assembly 33 includes a fixing rod 331 and a fixing plate 332; the fixing rod 331 is slidably connected to the fixing hole 322; the fixing plate 332 is fixed at one end of the fixing rod 331 and is located in the fixing cavity 321; the fixing rod 331 is slidably connected to the fixing hole 322 to facilitate the control of the movement of the fixing rod 331 and squeeze the inner wall of the bellows 9; the fixing plate 332 is used to limit the moving distance of the fixing rod 331 to prevent the fixing rod 331 from escaping from the fixing hole 322; the end of the fixing rod 331 close to the inner wall of the bellows 9 is provided with an arc surface that matches the convex inner wall of the bellows 9, and the contact area between the fixing rod 331 and the inner wall of the bellows 9 is increased by means of the arc surface, thereby improving the fixing effect.

[0025] See also Figures 1 to 4As a specific embodiment of the fixing device for bellows welding provided by the present invention, the fixing assembly 33 also includes an elastic member 333; the elastic member 333 is sleeved on the fixing rod 331, and the two ends are respectively connected to the fixing plate 332 and the inner wall of the fixing cavity 321; one end of the fixing rod 331 moves under the action of the pressure of the pressurized medium 324, and the fixing plate 332 squeezes the elastic member 333. When the bellows 9 is removed, the pressurizing assembly 34 releases pressure, and the elastic member 333 is reset by elastic force, thereby helping the fixing rod 331 to reset faster; the elastic member 333 is a spring; the pressurized medium 324 is oil or water.

[0026] See also Figure 3 and Figure 5 The cam 342 is provided with a screw thread on the top of the cam 343 and a screw thread on the bottom of the cam 343 is provided.

[0027] See also Figures 5 to 10As a specific embodiment of the fixing device for bellows welding provided by the present invention, a rotating disk 4 is provided on the mounting seat 31, and the rotating disk 4 is rotatably connected to the mounting seat 31; one end of the positioning rod 32 is fixedly connected to the rotating disk 4; a plurality of claws 41 and a power assembly 42 are provided on the rotating disk 4, and the plurality of claws 41 are arranged circumferentially along the positioning rod 32, and are all transmission-connected to the power assembly 42; the claw 41 has the function of clamping or loosening the right flange 7 by moving along the rotating disk 4 toward or away from the positioning rod 32; since flanges need to be welded at both ends of the bellows 9, the present application provides claws 41 on the rotating disk 4, and when installing the bellows 9, the right flange 7 is first sleeved on the positioning rod 32, and then the claws 41 are controlled by the power assembly 42 to fix the right flange 7, and while the bellows 9 is sleeved on the positioning rod 32, the end of the bellows 9 close to the right flange 7 is inserted The bellows 9 is fixed in the right flange 7 with the help of the fixing assembly 33; at the same time, the left flange 6 is fixed with the help of the flange fixing mechanism 2, the mounting seat 31 is controlled to move and the other end of the bellows 9 is inserted into the left flange 6; when welding the flanges, as the flange fixing mechanism 2 drives the left flange 6 to rotate, the left flange 6 drives the positioning rod 32 and the bellows 9 to rotate, and the welding mechanism 8 first welds the left flange 6 and the bellows 9, and then controls the movement of the welding structure so that the welding mechanism 8 welds the right flange 7 and the bellows 9; in this way, there is no need to remove and flip the bellows 9 after welding one end of the bellows 9, and weld the other end of the bellows 9, which simplifies the work difficulty and improves the work efficiency; the fixing rod 331 is set on the rotating disk 4, and the rotating disk 4 is rotatably connected to the mounting seat 31, so that the flange fixing mechanism 2 drives the positioning rod 32 and the bellows 9 to rotate.

[0028] See also Figures 5 to 10As a specific embodiment of the bellows welding fixing device provided by the present invention, the rotating disk 4 is provided with a plurality of power chambers 43 and a plurality of pressure holes 44 connected to the power chambers 43, and one end of the pressure hole 44 is connected to the fixing chamber 321; a plurality of limiting long holes 45 connected to the power chamber 43 are provided at one end of the rotating disk 4 close to the bellows 9; the claw 41 is slidably connected to the inner wall of the limiting long hole 45; the power assembly 42 includes a pushing member and a driving member; the pushing member is slidably connected to the inner wall of the pressure hole 44, and one end extends into the power chamber 43; the driving member is arranged in the power chamber 43, and is transmission-connected to the pushing member, and the driving member is transmission-connected to the claw 41; after the bellows 9 is inserted into the right flange 7, the pressurizing assembly 34 applies pressure to the fixing chamber 321 to drive The fixing assembly 33 fixes the bellows 9; since the pressure hole 44 is connected to the fixing chamber 321, the pushing member arranged in the pressure hole 44 is squeezed by the pressurized medium 324 and moves, and the pushing member drives the driving member located in the power chamber 43 to rotate, so that the driving member controls the claw 41 to move in the limiting long hole 45, so as to fix the right flange 7 with the help of the claw 41; with the help of the power chamber 43, the pressure hole 44 and the power assembly 42, when the fixing assembly 33 is controlled to fix the bellows 9, the claw 41 is synchronously controlled to fix the right flange 7, so as to further improve the work efficiency; since a plurality of claws 41 are circumferentially arranged around the positioning rod 32, when the claw 41 moves to fix the right flange 7, the right flange 7 is automatically aligned with the center of the bellows 9 to ensure the welding quality.

[0029] See also Figures 5 to 8 As a specific embodiment of the fixing device for bellows welding provided by the present invention, the pushing member includes a power rod 421 and a slide plate 422; the power rod 421 is arranged in the pressure hole 44, and one end thereof penetrates through the pressure hole 44 and extends into the power cavity 43; a plurality of gear teeth 423 are arranged on the power rod 421; the slide plate 422 is arranged at one end of the power rod 421 and is slidably connected to the inner wall of the pressure hole 44; the driving member includes a rack 424 and a gear 425; the rack 424 is vertically arranged at one end of the claw 41; the gear 425 is arranged in the power cavity 43 and is rotatably connected to the inner wall of the power cavity 43, and the gear 425 is located between the rack 424 and the power rod 421, and the gear 425 is meshed with the rack 424 and multiple gear teeth 423; when fixing the right flange 7, the pressurized medium 324 squeezes the slide plate 422 to move in the pressure hole 44, and the slide plate 422 pushes the power rod 421 to move in the direction away from the center of the rotating disk 4, and the multiple gear teeth 423 on the power rod 421 drive the gear 425 to rotate, and the gear 425 drives the rack 424 to move in the direction close to the center of the rotating disk 4, thereby making the rack 424 drive the claw 41 to move in the limiting long hole 45, thereby fixing the right flange 7.

[0030] See also Figure 6 and Figure 8As a specific embodiment of the fixing device for bellows welding provided by the present invention, a limit plate 441 is also provided in the pressure hole 44, and the limit plate 441 is fixedly connected to the inner wall of the pressure hole 44; one end of the power rod 421 passes through the limit plate 441; a reset member 426 is sleeved on the power rod 421, and the two ends of the reset member 426 are respectively connected to the limit plate 441 and the slide plate 422; when one end of the power rod 421 moves under the action of pressure, the limit plate 441 and the slide plate 422 squeeze the reset member 426, and when the bellows 9 is removed, the pressurizing assembly 34 releases pressure, and the reset member 426 is reset with the help of elastic force, thereby helping the power rod 421 to reset faster; the reset member 426 is a spring.

[0031] See also Figure 2 and Figure 4 As a specific embodiment of the fixing device for bellows welding provided by the present invention, a side of the fixing plate 332 close to the pressurizing hole 323 is provided with an inclined guide surface; with the help of the guide surface, it is easier for the pressurized medium 324 to push the fixing rod 331 out of the fixing hole 322.

[0032] See also Figure 1 and Fig.11 As a specific embodiment of the bellows welding fixing device provided by the present invention, a bellows welding fixing device also includes a driving component 5; the driving component 5 is arranged on the frame 1 and is transmission-connected with the mounting seat 31, and is used to drive the mounting seat 31 to move; with the help of the driving component 5 arranged on the frame 1, the mounting seat 31 is driven to move, so as to drive the bellows 9 to move in the direction close to the flange fixing mechanism 2, so that one end of the bellows 9 is inserted into the left flange 6.

[0033] See also Figure 1 and Fig.11 As a specific embodiment of the fixing device for bellows welding provided by the present invention, the driving assembly 5 includes a slide rail 51 and a pusher 52 arranged on the frame 1; the length direction of the slide rail 51 is arranged toward the flange fixing mechanism 2, and the mounting seat 31 is slidably connected to the slide rail 51; the free end of the pusher 52 is connected to the transmission rod of the mounting seat 31, which is used to drive the mounting seat 31 to move; with the help of the slide rail 51, the movement of the mounting seat 31 can be made more stable; the pusher 52 is a cylinder.

[0034] See also Figure 1As a specific embodiment of the fixing device for bellows welding provided by the present invention, the flange fixing mechanism 2 includes a support frame 21, a driver 22 and a chuck 23; the support frame 21 and the driver 22 are arranged on the frame 1; the chuck 23 is arranged on the support frame 21, and is used to clamp the flange; the chuck 23 is rotatably connected to the support frame 21; the free end of the driver 22 is transmission-connected to the chuck 23, and is used to drive the chuck 23 to rotate; the support frame 21 is used to facilitate the driver 22 to drive the chuck 23 to rotate; the driver 22 is used to drive the chuck 23 to rotate; the driver 22 is used to drive the chuck 23 to rotate.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixing device for bellows welding, characterized in that: It includes a flange fixing mechanism and a bellows fixing mechanism installed on the frame; the flange fixing mechanism is located below the welding mechanism, and the bellows fixing mechanism is located on one side of the flange fixing mechanism; The bellows fixing mechanism comprises a mounting seat, a positioning rod and a plurality of fixing components; the mounting seat is arranged on the frame and has the freedom to move along the frame toward or away from the flange fixing mechanism; one end of the positioning rod is rotatably connected to the mounting seat, and the other end is arranged toward the flange fixing mechanism; a fixing cavity and a plurality of fixing hole groups are provided on the positioning rod, a pressurizing hole is provided in the fixing cavity, and a pressurizing component is provided in the pressurizing hole; a pressurized medium is provided in the fixing cavity; a plurality of the fixing hole groups are arranged along the length direction of the positioning rod, the fixing hole group is a plurality of fixing holes arranged along the circumference of the positioning rod, and a plurality of the fixing holes are connected with the fixing cavity; the bellows is sleeved on the positioning rod; a plurality of the fixing components are respectively arranged in a plurality of the fixing holes and are slidably connected with the inner wall of the fixing hole; the pressurizing component is controlled to apply pressure toward the fixing cavity, the pressurized medium squeezes the fixing component, and the plurality of the fixing components move toward the direction close to the bellows under the action of pressure and squeeze the inner wall of the bellows protruding outward, thereby fixing the bellows.

2. A fixing device for bellows welding as claimed in claim 1, characterized in that: The fixing assembly comprises a fixing rod and a fixing plate; the fixing rod is slidably connected to the fixing hole; the fixing plate is fixed to one end of the fixing rod and is located in the fixing cavity.

3. A fixing device for bellows welding as claimed in claim 2, characterized in that: The fixing assembly also includes an elastic member; the elastic member is sleeved on the fixing rod, and two ends of the elastic member are respectively connected to the fixing plate and the inner wall of the fixing cavity.

4. A fixing device for bellows welding as claimed in claim 1, characterized in that: An internal thread section is provided on the inner wall of the pressurizing hole; the pressurizing assembly includes a pressurizing plate and a pressurizing rod; the pressurizing plate is arranged in the pressurizing hole and is slidably connected to the inner wall of the pressurizing hole; the pressurizing rod is provided with an external thread section threadedly connected to the internal thread section, and one end of the pressurizing rod passes through the mounting seat and is rotatably connected to the pressurizing plate.

5. A fixing device for bellows welding as claimed in claim 1, characterized in that: A rotating disk is provided on the mounting seat, and the rotating disk is rotatably connected to the mounting seat; one end of the positioning rod is fixedly connected to the rotating disk; a plurality of claws and a power assembly are provided on the rotating disk, and the plurality of claws are arranged along the circumference of the positioning rod, and are all transmission-connected to the power assembly; the claw has the function of clamping or loosening the right flange by moving along the rotating disk toward or away from the positioning rod.

6. A fixing device for bellows welding as claimed in claim 5, characterized in that: The rotating disk is provided with a plurality of power cavities and a plurality of pressure holes connected with the power cavities, and one end of the pressure holes is connected with the fixed cavity; a plurality of limiting long holes connected with the power cavity are provided at one end of the rotating disk close to the bellows; the clamping claw is slidably connected with the inner wall of the limiting long hole; the power assembly includes a pushing member and a driving member; the pushing member is slidably connected with the inner wall of the pressure hole, and one end extends into the power cavity; the driving member is arranged in the power cavity, and is transmission-connected with the pushing member, and the driving member is transmission-connected with the clamping claw.

7. A fixing device for bellows welding as claimed in claim 6, characterized in that: The pushing member includes a power rod and a slide plate; the power rod is arranged in the pressure hole, and one end of the power rod passes through the pressure hole and extends into the power cavity; a plurality of gear teeth are arranged on the power rod; the slide plate is arranged at one end of the power rod and is slidably connected to the inner wall of the pressure hole; the driving member includes a rack and a gear; the rack is vertically arranged at one end of the claw; the gear is arranged in the power cavity and is rotatably connected to the inner wall of the power cavity, the gear is located between the rack and the power rod, and the gear is meshed with the rack and the plurality of gear teeth.

8. A fixing device for bellows welding as claimed in claim 7, characterized in that: A limit plate is also provided in the pressure hole, and the limit plate is fixedly connected to the inner wall of the pressure hole; one end of the power rod passes through the limit plate; a reset member is sleeved on the power rod, and the two ends of the reset member are respectively connected to the limit plate and the slide plate.

9. A fixing device for bellows welding as claimed in claim 1, characterized in that: The fixing device for bellows welding also includes a driving component; the driving component is arranged on the frame and is transmission-connected to the mounting seat for driving the mounting seat to move.

10. A fixing device for bellows welding as claimed in claim 1, characterized in that: The flange fixing mechanism includes a support frame, a driver and a chuck; the support frame and the driver are arranged on a frame; the chuck is arranged on the support frame and is used to clamp the flange; the chuck is rotatably connected to the support frame; the free end of the driver is transmission-connected to the chuck and is used to drive the chuck to rotate.

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