Welding equipment for spiral folded plate of heat exchanger

Abstract

The invention relates to the technical field of welding equipment, and provides welding equipment for a spiral folded plate of a heat exchanger, the welding equipment comprises a rack, a rotating mechanism, a welding mechanism, a first clamping mechanism and a second clamping mechanism, the rotating mechanism comprises a positioning rod, and the first clamping mechanism and the second clamping mechanism both comprise clamping pieces; the clamping piece is provided with a contact piece, an elastic rod and a ball head structure, the end of the elastic rod is fixedly connected with the ball head structure, the contact piece movably sleeves the surface of the ball head structure, the fan-shaped folded plate is in sliding contact with the contact piece, the welding mechanism comprises two moving frames, an electric arc welder and a scanning module, and the two moving frames are symmetrically arranged on the two sides of a splicing seam. The moving frame is parallel to a splicing seam, the scanning module is installed on the moving frame, the electric arc welding device is arranged on one side of the moving frame, and when the rotating mechanism drives a welded part to rotate by 180 degrees, the sector plate accurately moves along the axis of the positioning rod by linear motion of a screw pitch, and lossless automatic discharging is achieved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding device for spiral baffles in heat exchangers. Background Technology

[0002] Spiral baffles, as key heat transfer elements in equipment such as shell-and-tube heat exchangers, are typically made by continuously splicing and welding multiple pre-formed fan-shaped plates along a spiral line to form a continuous spiral flow channel. This structure can effectively enhance fluid turbulence and improve heat transfer efficiency, and is therefore widely used in chemical, energy, pharmaceutical and other industrial fields.

[0003] However, the manufacturing of spiral folded plates, especially the welding process, has long faced many technical challenges. Traditional manufacturing methods usually rely on manual labor or simple tooling fixtures to position and fix the sector plates. Due to the characteristics of the spiral folded plate as a three-dimensional curved surface, each sector plate not only needs to be accurately positioned in the radial and circumferential directions, but also needs to maintain a strict pitch relationship along the spiral axis. When assembling manually, it is difficult to ensure the continuity and consistency of the splice seams, and the efficiency is low and the labor intensity is high.

[0004] In the welding process, the spiral joint is a spatial curve. Traditional fixed welding torches or simple linear motion welding devices cannot keep the welding torch perpendicular to or at the optimal angle to track the weld, resulting in welding trajectory deviation, uneven penetration, poor forming quality, and even defects such as incomplete penetration and undercut, which seriously affect the sealing performance and structural strength of the product.

[0005] In addition, after each section of weld is completed, the welded part and the part to be welded need to be repositioned in a complicated way to expose the next section of weld. This process is not only time-consuming, but also introduces cumulative errors, making it difficult to achieve continuous automated production of long-size, high-precision spiral folding plates. Summary of the Invention

[0006] The purpose of this invention is to provide a welding device for spiral baffles in heat exchangers, aiming to solve the problems existing in the welding devices for spiral baffles in heat exchangers.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding device for spiral baffles in a heat exchanger, comprising a frame, and further comprising: A rotating mechanism is installed within the frame, the rotating mechanism including a positioning rod, the positioning rod being used to pass through the assembly hole on the surface of the fan-shaped folding plate; The first clamping mechanism and the second clamping mechanism are arranged in the frame. Both the first clamping mechanism and the second clamping mechanism include clamping components. The clamping components are provided with contact components, elastic rods and ball head structures. The end of the elastic rod is fixedly connected to the ball head structure. The contact component is movably sleeved on the surface of the ball head structure. The fan-shaped folding plate is in sliding contact with the contact component. The clamping components of the first clamping mechanism and the clamping components of the second clamping mechanism are distributed on both sides of the fan-shaped folding plate. The distance between the two sets of clamping components on the positioning rod axis is consistent with the pitch of the two sets of fan-shaped folding plates. The welding mechanism is located above the splice seam of the two sets of fan-shaped folded plates. The welding mechanism includes a moving frame, an arc welder and a scanning module. The two sets of moving frames are symmetrically arranged on both sides of the splice seam and are parallel to the splice seam. The scanning module is installed on the moving frame and the arc welder is located on one side of the moving frame.

[0008] As a further embodiment of the present invention, the rotating mechanism includes a turntable and a first driving member, one end of a plurality of positioning rods is fixedly mounted on the surface of the turntable, the first driving member is fixedly mounted on the surface of the frame, the turntable is rotatably connected to one end of the frame, and the first driving member is drively connected to the turntable.

[0009] As a further embodiment of the present invention, the first clamping mechanism and the second clamping mechanism further include a base and a first telescopic member. The base is fixedly installed on the surface of the frame, the fixed end of the first telescopic member is fixedly connected to the base, and the clamping member is fixedly connected to the movable end of the first telescopic member.

[0010] As a further embodiment of the present invention, the welding mechanism further includes a base shell, a second driving member, and a second telescopic member. The second driving member is fixedly installed on the frame, the base shell is rotatably connected to the frame, the second driving member is drively connected to the base shell, the fixed end of the second telescopic member is fixedly connected to the base shell, and the movable frame is fixedly connected to the movable end of the second telescopic member.

[0011] As a further embodiment of the present invention, the welding mechanism further includes a moving rod, a worm gear, a worm wheel, and a slide rail. The worm wheel is rotatably connected inside the moving frame, and the slide rail is fixedly connected to the center position of one end of the worm wheel. The arc welder is installed inside the slide rail, the moving rod is connected to the moving frame, the worm gear is fixedly connected to one end of the moving rod, and the worm wheel is drively connected to the worm gear.

[0012] As a further embodiment of the present invention, the welding mechanism further includes a third driving member, which includes a third telescopic member, a C-shaped gear frame, a rotating tube, and a gear. The fixed end of the third telescopic member is fixedly connected to the base, the C-shaped gear frame is fixedly connected to the movable end of the third telescopic member, the rotating tube is installed inside the base, the gear is installed on the surface of the rotating tube, the C-shaped gear frame is connected to the gear for transmission, and the moving rod is movably sleeved inside the rotating tube.

[0013] As a further embodiment of the present invention, the positioning rods are located near the splicing seams at both ends of the fan-shaped folding plate.

[0014] As a further embodiment of the present invention, a material discharge port is provided at one end of the frame near the welding mechanism.

[0015] The beneficial effects of this invention are as follows: The distance between the first clamping mechanism and the second clamping mechanism in the axial direction of the positioning rod is fixed at one pitch. When the rotating mechanism drives the welded part to rotate 180°, since the contact of the clamping mechanism is in sliding contact with the curved surface of the sector plate, the rotational motion is converted into a linear motion in which the sector plate moves precisely along the axis of the positioning rod by one pitch. This allows the next sector plate to be welded to move automatically and precisely to the welding station, and the splice seam is always located in the best welding position above. The welding mechanism can maintain the best welding position and angle throughout the entire spiral weld length. After welding, by utilizing the spiral relationship between the contact and the surface of the spiral folded plate, the reverse rotation will drive the entire welded spiral folded plate to move smoothly along the axial direction of the positioning rod towards the discharge port, realizing non-destructive automatic unloading. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is a three-dimensional view of a spiral folding plate in the prior art.

[0018] Figure 3 This is a perspective view of the rotating mechanism in this invention.

[0019] Figure 4 This is a perspective view of the first clamping mechanism in this invention.

[0020] Figure 5 This is a perspective view of the welding mechanism in this invention.

[0021] Figure 6 This is a cross-sectional view of the welding mechanism in this invention.

[0022] Figure 7 This is a top view of the first clamping mechanism, the second clamping mechanism, and the spiral folding plate in this invention.

[0023] Figure 8 For the present invention Figure 1 A magnified view of a portion of point a.

[0024] Reference numerals: 100-spiral folding plate, 110-fan-shaped folding plate, 111-assembly hole, 112-joint seam; 200-Rotating mechanism, 210-Turntable, 220-Positioning rod, 230-First driving component; 300-First clamping mechanism, 310-Base, 320-First telescopic component, 330-Clamping component, 331-Contact component, 332-Elastic rod, 333-Ball head structure; 400-Welding mechanism, 410-Base shell, 420-Second driving component, 430-Second telescopic component, 440-Moving frame, 450-Arc welder, 460-Worm gear, 461-Slide rail, 470-Scanning module, 480-Moving rod, 481-Worm gear, 490-Third driving component, 491-Third telescopic component, 492-Rhomboid gear frame, 493-Rotating tube, 494-Gear; 500 - Second clamping mechanism; 600 - Frame, 610 - Feed port. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0027] Please see Figures 1 to 8 In one embodiment of the present invention, a welding apparatus for a spiral baffle plate of a heat exchanger includes a frame 600 and further includes: A rotating mechanism 200 is installed within the frame 600. The rotating mechanism 200 includes a turntable 210, a first driving member 230, and positioning rods 220. One end of each positioning rod 220 is fixedly installed on the surface of the turntable 210. The first driving member 230 is fixedly installed on the surface of the frame 600. The turntable 210 is rotatably connected to one end of the frame 600. The first driving member 230 is drively connected to the turntable 210. The positioning rods 220 are distributed near the splicing seams 112 at both ends of the fan-shaped folding plate 110. The positioning rods 220 are used to penetrate the assembly holes 111 on the surface of the fan-shaped folding plate 110. The assembly holes 111 on the surface of the fan-shaped folding plate 110 are used to connect to the eccentric tube inside the heat exchanger. The diameter of the positioning rod 220 is the same as the outer diameter of the eccentric tube. The first clamping mechanism 300 and the second clamping mechanism 500 are disposed within the frame 600. Both the first clamping mechanism 300 and the second clamping mechanism 500 include a clamping member 330. The clamping member 330 is provided with a contact member 331, an elastic rod 332 and a ball head structure 333. The end of the elastic rod 332 is fixedly connected to the ball head structure 333. The contact member 331 is movably sleeved on the surface of the ball head structure 333. The fan-shaped folding plate 110 slides in contact with the contact member 331. The clamping members 330 of the first clamping mechanism 300 and the clamping members 330 of the second clamping mechanism 500 are distributed on both sides of the fan-shaped folding plate 110. The distance between the two sets of clamping members 330 on the axis of the positioning rod 220 is consistent with the pitch of the two sets of fan-shaped folding plates 110. The welding mechanism 400 is located above the splice seam 112 of the two sets of fan-shaped folding plates 110. The frame 600 has a material discharge port 610 at one end near the welding mechanism 400. The welding mechanism 400 includes a moving frame 440, an arc welder 450 and a scanning module 470. The two sets of moving frames 440 are symmetrically arranged on both sides of the splice seam 112 and are parallel to the splice seam 112. The scanning module 470 is mounted on the moving frame 440 and the arc welder 450 is located on one side of the moving frame 440.

[0028] In this embodiment of the invention, the positioning rod 220 through the assembly hole 111 of the fan-shaped plate is used for preliminary positioning and fixation in the radial and circumferential directions. The distance between the first clamping mechanism 300 and the second clamping mechanism 500 in the axial direction of the positioning rod 220 is fixed at one pitch. When the rotating mechanism 200 drives the welded fan-shaped plate 110 to rotate 180°, since the contact member 331 of the clamping mechanism is in sliding contact with the curved surface of the fan-shaped plate, the rotational motion is converted into a linear motion in which the fan-shaped plate 110 moves precisely along the axis of the positioning rod 220 by one pitch. This allows the next fan-shaped plate to be welded to move automatically and accurately to the welding station, and the splice seam 112 is always located in the best welding position above. This realizes a continuous automated cycle of welding, feeding, and re-welding without the need for manual repositioning, which greatly improves work efficiency and accuracy.

[0029] The clamping component 330 adopts a unique configuration of elastic rod 332, ball head, and contact component 331. The contact component 331 is a drum-shaped clamping block or a conical clamping block. During use, the elastic rod 332 provides axial clamping force, and the ball head hinge allows the contact component 331 to swing in multiple directions. The movable contact component 331 eventually achieves surface contact or line contact with the spiral curved surface of the sector plate. When the rotating mechanism 200 drives the workpiece to rotate and slide, the contact component 331 can adaptively adjust its posture with the change of the curved surface, always maintaining a contact state, providing stable clamping force while avoiding rigid scraping, and realizing flexible, dynamic and non-destructive clamping of complex spiral curved surfaces, which not only ensures clamping stability but also avoids damage to the workpiece surface.

[0030] Please see Figures 4 to 7 In another embodiment of the present invention, the first clamping mechanism 300 and the second clamping mechanism 500 further include a base 310 and a first telescopic member 320. The base 310 is fixedly installed on the surface of the frame 600, the fixed end of the first telescopic member 320 is fixedly connected to the base 310, and the clamping member 330 is fixedly connected to the movable end of the first telescopic member 320.

[0031] Please see Figures 5 to 8Furthermore, the welding mechanism 400 also includes a base shell 410, a second driving member 420, and a second telescopic member 430. The second driving member 420 is fixedly mounted on the frame 600. The base shell 410 is rotatably connected to the frame 600. The second driving member 420 is drive-connected to the base shell 410. The fixed end of the second telescopic member 430 is fixedly connected to the base shell 410. The movable frame 440 is fixedly connected to the movable end of the second telescopic member 430. The second driving member 420 and the base shell 410 control the overall rotation of the movable frame 440 to adjust the tilt angle according to the spiral direction so that it is parallel to the splice seam 112.

[0032] Furthermore, the welding mechanism 400 also includes a moving rod 480, a worm gear 481, a worm wheel 460, and a slide rail 461. The worm wheel 460 is rotatably connected to the moving frame 440, and the slide rail 461 is fixedly connected to the center position of one end of the worm wheel 460. The arc welder 450 is installed in the slide rail 461. The moving rod 480 is connected to the moving frame 440, the worm gear 481 is fixedly connected to one end of the moving rod 480, and the worm wheel 460 is drively connected to the worm gear 481.

[0033] Furthermore, the welding mechanism 400 also includes a third driving member 490, which includes a third telescopic member 491, a U-shaped gear frame 492, a rotating tube 493, and a gear 494. The fixed end of the third telescopic member 491 is fixedly connected to the base 310, the U-shaped gear frame 492 is fixedly connected to the movable end of the third telescopic member 491, the rotating tube 493 is installed inside the base 310, the gear 494 is installed on the surface of the rotating tube 493, the U-shaped gear frame 492 is drively connected to the gear 494, and the moving rod 480 is movably sleeved inside the rotating tube 493. The moving rod 480 and the rotating tube 493 adopt a key and keyway mating structure. The first telescopic member 320 is a hydraulic telescopic rod, and the second telescopic member 430 and the third telescopic member 491 are both electric telescopic rods.

[0034] In this embodiment of the invention, during the welding process, the second telescopic member 430 drives and controls the moving frame 440 to move along the splice seam 112. The scanning module 470 first scans the splice seam 112 to obtain three-dimensional trajectory data. The third telescopic member 491 controls the rotation of the rotating tube 493, the moving rod 480, the worm gear 481, the worm wheel 460, and the arc welder 450 through the gear 494. This is used to adjust the inclination angle of the arc welder 450 relative to the weld seam in real time or in segments according to the scanning data. This ensures that the arc welder 450 can maintain the best welding position and angle throughout the entire weld seam length, significantly improving the forming quality and consistency of the weld seam, and realizing intelligent tracking welding of spatial curve weld seams.

[0035] The welding steps include: S100. In sequence, two sets of fan-shaped folding plates 110 are placed on the positioning rod 220 from the feeding port 610. The clamping members 330 in the first clamping mechanism 300 and the second clamping mechanism 500 fix the two sets of fan-shaped folding plates 110 respectively. The elastic rod 332 and the ball head structure 333 in the clamping member 330 enable the contact member 331 to fit against the curved surface of the fan-shaped folding plate 110. It should be noted that the splicing seam 112 of the two sets of fan-shaped folding plates 110 should be located at the top or distributed near the welding mechanism 400. S200 and the second driving component 420 drive the base shell 410 to rotate, making the direction of the moving frame 440 parallel to the splice seam 112. The scanning module 470 first scans the entire splice seam 112 to acquire three-dimensional trajectory data. Subsequently, the second telescopic component 430 drives the moving frame 440 to move the arc welder 450 to the starting end of the splice seam 112. During the welding process, the third driving component 490 adjusts the inclination angle of the arc welder 450 relative to the weld seam in real time according to the scanning data through the transmission of gear 494, rotating tube 493, moving rod 480, worm gear 481 and worm wheel 460. At the same time, the second telescopic component 430 controls the moving frame 440 to move along the splice seam 112, and the two sets of arc welders 450 perform synchronous welding from both sides of the splice seam 112. After the welding of the two sets of fan-shaped folded plates 110 is completed, the arc welder 450 moves above the spiral folded plate 100. The first driving component 230 controls the turntable 210, the positioning rod 220 and the welded fan-shaped folded plate 110 to rotate 180 degrees. The fan-shaped folded plate 110 rotating around the central axis of the spiral folded plate 100 slides in contact with the relatively stationary contact component 331, which can drive the fan-shaped folded plate 110 to move by a unit pitch. For example, the pitch of the spiral folded plate 100 is 20cm. After the turntable 210, the positioning rod 220 and the welded fan-shaped folded plate 110 rotate 180 degrees, the fan-shaped folded plate 110 corresponding to the second clamping mechanism 500 can move to the position of the first clamping mechanism 300. At this time, another fan-shaped folded plate 110 to be welded is placed on the positioning rod 220 to ensure that the splice seam 112 is always above until the welding of the complete spiral folded plate 100 is completed. S400 After the final welding is completed, the first driving component 230 controls the turntable 210 and the positioning rod 220 to rotate in the opposite direction by a preset angle. By using the contact component 331 to slide in contact with the surface of the spiral folding plate 100, the spiral folding plate 100 can be driven to move along the positioning rod 220 toward the discharge port 610, thus realizing the automatic unloading of the spiral folding plate 100 after welding.

[0036] In summary, the distance between the first clamping mechanism 300 and the second clamping mechanism 500 in the axial direction of the positioning rod 220 is fixed at one pitch. When the rotating mechanism 200 drives the welded part to rotate 180°, since the contact element 331 of the clamping mechanism is in sliding contact with the curved surface of the sector plate, the rotational motion is converted into a linear motion in which the sector plate moves precisely along the axis of the positioning rod 220 by one pitch. This allows the next sector plate to be welded to move automatically and precisely to the welding station, and the splice seam 112 is always located in the optimal welding position above. The welding mechanism 400 can maintain the optimal welding position and angle throughout the entire spiral weld length. After welding is completed, by utilizing the spiral relationship between the contact element 331 and the surface of the spiral folding plate 100, the reverse rotation will drive the entire welded spiral folding plate 100 to move smoothly along the axial direction of the positioning rod 220 towards the discharge port 610, achieving non-destructive automatic unloading.

[0037] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and 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.

Claims

1. A welding apparatus for spiral baffles in a heat exchanger, comprising a frame (600), characterized in that, Also includes: A rotating mechanism (200) is provided in the frame (600), the rotating mechanism (200) includes a positioning rod (220), the positioning rod (220) is used to pass through the mounting hole (111) on the surface of the fan-shaped folding plate (110); The first clamping mechanism (300) and the second clamping mechanism (500) are disposed within the frame (600). Both the first clamping mechanism (300) and the second clamping mechanism (500) include a clamping member (330). The clamping member (330) is provided with a contact member (331), an elastic rod (332) and a ball head structure (333). The end of the elastic rod (332) is fixedly connected to the ball head structure (333). The contact member (331) is movably sleeved on the surface of the ball head structure (333). The fan-shaped folding plate (110) slides in contact with the contact member (331). The clamping members (330) of the first clamping mechanism (300) and the clamping members (330) of the second clamping mechanism (500) are distributed on both sides of the fan-shaped folding plate (110). The distance between the two sets of clamping members (330) on the axis of the positioning rod (220) is consistent with the pitch of the two sets of fan-shaped folding plates (110). A welding mechanism (400) is set above the splice seam (112) of two sets of fan-shaped folding plates (110). The welding mechanism (400) includes a moving frame (440), an arc welder (450) and a scanning module (470). The two sets of moving frames (440) are symmetrically arranged on both sides of the splice seam (112) and the moving frames (440) are parallel to the splice seam (112). The scanning module (470) is installed on the moving frame (440) and the arc welder (450) is set on one side of the moving frame (440).

2. The welding equipment for spiral baffles in a heat exchanger according to claim 1, characterized in that, The rotating mechanism (200) includes a turntable (210) and a first driving member (230). One end of each of the positioning rods (220) is fixedly mounted on the surface of the turntable (210). The first driving member (230) is fixedly mounted on the surface of the frame (600). The turntable (210) is rotatably connected to one end of the frame (600). The first driving member (230) is drively connected to the turntable (210).

3. The welding equipment for spiral baffles in a heat exchanger according to claim 2, characterized in that, The first clamping mechanism (300) and the second clamping mechanism (500) further include a base (310) and a first telescopic member (320). The base (310) is fixedly installed on the surface of the frame (600). The fixed end of the first telescopic member (320) is fixedly connected to the base (310). The clamping member (330) is fixedly connected to the movable end of the first telescopic member (320).

4. The welding equipment for spiral baffles in a heat exchanger according to claim 3, characterized in that, The welding mechanism (400) further includes a base shell (410), a second driving member (420), and a second telescopic member (430). The second driving member (420) is fixedly mounted on the frame (600). The base shell (410) is rotatably connected to the frame (600). The second driving member (420) is drive-connected to the base shell (410). The fixed end of the second telescopic member (430) is fixedly connected to the base shell (410). The movable frame (440) is fixedly connected to the movable end of the second telescopic member (430).

5. The welding equipment for spiral baffles in a heat exchanger according to claim 4, characterized in that, The welding mechanism (400) further includes a moving rod (480), a worm gear (481), a worm wheel (460), and a slide rail (461). The worm wheel (460) is rotatably connected inside the moving frame (440), and the slide rail (461) is fixedly connected to the center position of one end of the worm wheel (460). The arc welder (450) is installed inside the slide rail (461). The moving rod (480) is connected to the moving frame (440), and the worm gear (481) is fixedly connected to one end of the moving rod (480). The worm wheel (460) is drive-connected to the worm gear (481).

6. The welding equipment for spiral baffles in a heat exchanger according to claim 5, characterized in that, The welding mechanism (400) further includes a third driving member (490), which includes a third telescopic member (491), a U-shaped gear frame (492), a rotating tube (493), and a gear (494). The fixed end of the third telescopic member (491) is fixedly connected to the base (310), the U-shaped gear frame (492) is fixedly connected to the movable end of the third telescopic member (491), the rotating tube (493) is installed inside the base (310), the gear (494) is installed on the surface of the rotating tube (493), the U-shaped gear frame (492) and the gear (494) are connected in a transmission manner, and the moving rod (480) is movably sleeved inside the rotating tube (493).

7. The welding equipment for spiral baffles in a heat exchanger according to claim 2, characterized in that, The positioning rods (220) are located near the splicing seams (112) at both ends of the fan-shaped folding plate (110).

8. The welding equipment for spiral baffles in a heat exchanger according to claim 1, characterized in that, The frame (600) has a discharge port (610) at one end near the welding mechanism (400).

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