Heat exchanger tube plate welding device

Abstract

The invention discloses a heat exchanger tube plate welding device, and relates to the technical field of heat exchanger processing equipment, the heat exchanger tube plate welding device comprises a base and stand columns symmetrically arranged on one side of the base, the bottom ends of the stand columns are provided with bearing seats, the bearing seats are fixedly connected with the base, the stand columns are movably provided with assembling frames, and the assembling frames are fixedly provided with supporting plates. A stable supporting foundation is formed by the base and the stand column, primary horizontal limiting of the heat exchanger shell is achieved through the bearing opening of the bearing seat, then the sliding rail and the sliding plate driven by the sliding block are combined, the sliding plate is tightly attached to the outer wall of the shell in the vertical direction to form double fixing, deviation or movement of the shell in the welding process is effectively avoided, and the welding quality is improved. And meanwhile, the telescopic air cylinder is in linkage with the flange plate and the electric welding device to conduct accurate adjustment in the vertical direction, height presetting of the assembly frame is matched, welding positioning can be rapidly completed, the operation process is simplified, and the welding operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger processing equipment technology, and more specifically, to a heat exchanger tube sheet welding device. Background Technology

[0002] Heat exchangers, as core equipment for transferring heat between industrial media, are widely used in many key fields such as chemical, petroleum, energy, and refrigeration. Their operational reliability directly affects the efficiency and safety of the entire production system. Tube sheets, as the core pressure-bearing components of heat exchangers, play a crucial role in fixing the heat exchange tubes and separating the media. Their welding connection to the shell is a critical process in heat exchanger manufacturing. This welded joint must simultaneously meet requirements for sealing performance, structural strength, and corrosion resistance. Defects in welding quality can easily lead to media leakage, equipment downtime, or even safety accidents. Therefore, stringent requirements are placed on the precision and stability of the welding process and welding equipment.

[0003] Existing heat exchanger tube sheet welding equipment still faces numerous technical bottlenecks in practical applications. On one hand, traditional equipment suffers from simplistic fixing mechanisms, often employing a single clamp or simple support structure to position the heat exchanger shell. This lack of multi-dimensional constraint makes the shell prone to horizontal or vertical shifts during welding due to its own weight and welding stress. This leads to coaxiality deviations between the tube sheet and the shell, resulting in uneven weld gaps, undercut, and incomplete penetration. On the other hand, existing equipment exhibits poor adaptability, often designed for specific heat exchanger specifications. When dealing with heat exchanger shells of varying diameters and heights, specialized clamps must be replaced or the overall equipment structure readjusted, resulting in cumbersome and time-consuming operations that reduce production efficiency and increase equipment investment costs. Furthermore, the welding actuators in traditional welding equipment are mostly manually operated, making precise control of the welding height difficult. Positioning deviations during adjustment are also prone to occur, affecting the consistency of weld quality and failing to meet the high-efficiency, high-precision requirements of modern industry for mass production of heat exchangers.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] In view of the problems in the related technologies, the present invention proposes a heat exchanger tube sheet welding device to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] The technical solution of this invention is implemented as follows: A heat exchanger tube sheet welding device includes: a base and columns symmetrically arranged on one side of the base. The bottom end of the column is provided with a bearing seat, which is fixedly connected to the base. An assembly frame is movably provided on the column, and a support plate is fixedly provided on the assembly frame. A telescopic cylinder is provided on the support plate, and the output end of the telescopic cylinder passes through the support plate and is connected to a flange. An electric welding device is provided at the bottom end of the flange.

[0007] Furthermore, the support seat has a support opening, which is a circular groove structure, and the diameter of the support opening is adapted to the outer diameter of the heat exchanger shell, for placing the heat exchanger shell on the support opening for fixation.

[0008] Furthermore, two sets of vertically arranged slide rails are provided between the columns and adapted to the support base, and sliders are movably mounted on the slide rails, with sliding plates connecting the sliders.

[0009] Furthermore, the bottom end of the column is fixedly connected to the base, the slide plate is provided with several assembly holes and is adapted to the outer wall of the heat exchanger shell, and the slide plate moves up and down along the slide rail through the slider to adjust the range to adapt to heat exchanger shells of different height specifications, and the slide plate cooperates with the bearing port to realize the dual limiting and fixing of the heat exchanger shell in the horizontal and vertical directions.

[0010] Furthermore, the slide plate has an arc-shaped structure, and its curvature is adapted to the curvature of the outer wall of the heat exchanger shell. The inner wall of the slide plate is provided with a wear-resistant rubber pad.

[0011] Furthermore, the assembly frame is a frame structure, and the assembly frame is equipped with locking bolts. The assembly frame is fixedly connected to the column through the locking bolts, and the height of the welding device can be adjusted by adjusting the vertical height of the assembly frame.

[0012] Furthermore, the support plate is an L-shaped flat plate structure, the output end of the telescopic cylinder is vertically downward, and the flange is a circular plate structure that is fixed to the output end of the telescopic cylinder by bolts.

[0013] Furthermore, the welding device is a gas metal arc welding machine, and the welding device is fixed to the lower surface of the flange by bolts, with the welding head set vertically downward and aligned with the center of the bearing port.

[0014] The beneficial effects of this invention are: This invention utilizes a base and column to form a stable support foundation. The bearing port of the bearing seat provides initial horizontal positioning of the heat exchanger shell. Combined with the slide rail and the sliding plate driven by the slider, it forms a double fixation by tightly fitting the outer wall of the shell in the vertical direction. This effectively prevents the shell from shifting or moving during welding, ensuring the coaxiality of the welded parts and the uniformity of the weld, and significantly improving welding accuracy. The assembly frame can be flexibly adjusted in height along the column and fixed with bolts. The sliding plate can rise and fall freely along the slide rail with the slider. It can adapt to heat exchanger shells of different specifications without changing special fixtures, significantly enhancing the versatility of the device and reducing equipment investment and replacement costs. The telescopic cylinder links the flange and the welding device for precise vertical adjustment. With the height preset of the assembly frame, welding positioning can be completed quickly, simplifying the operation process, improving welding efficiency, and ensuring that the welding head is always aligned with the part to be welded, ensuring the stability and consistency of welding quality, and meeting the high-efficiency and high-precision requirements of mass production of heat exchangers in industrial production. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a heat exchanger tube sheet welding device according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a heat exchanger tube sheet welding device according to an embodiment of the present invention. Figure 2 . Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0018] According to an embodiment of the present invention, a heat exchanger tube sheet welding apparatus is provided.

[0019] like Figures 1-2As shown, the heat exchanger tube sheet welding device according to an embodiment of the present invention includes: a base 1 and columns 2 symmetrically arranged on one side of the base 1. The bottom end of the column 2 is provided with a bearing seat 3, which is fixedly connected to the base 1. An assembly frame 4 is movably provided on the column 2. A support plate 5 is fixedly provided on the assembly frame 4. A telescopic cylinder 6 is provided on the support plate 5. The output end of the telescopic cylinder 6 passes through the support plate 5 and is connected to a flange 7. An electric welding device 8 is provided at the bottom end of the flange 7.

[0020] In this technical solution, the base 1 is a horizontally positioned rectangular plate structure made of high-strength alloy material to ensure the overall stability of the device. The column 2 is a vertically positioned column structure with its axis perpendicular to the upper surface of the base 1. The bearing seat 3 is fastened to the base 1 with bolts, and the connection surface is equipped with anti-slip pads to enhance the connection's firmness.

[0021] The bearing seat 3 has a bearing port 12, which is a circular groove structure. The diameter of the bearing port 12 is adapted to the outer diameter of the heat exchanger shell, and is used to place the heat exchanger shell on the bearing port 12 for fixation.

[0022] Specifically, the support base 3 is a block structure, and the support port 12 is a circular groove structure with an elastic anti-slip pad on the inner wall of the groove. The diameter of the support port 12 is adapted to the outer diameter of a conventional heat exchanger shell, allowing the heat exchanger shell to be placed inside the support port 12 and initially fixed by the elastic anti-slip pad to prevent the shell from shifting horizontally.

[0023] In addition, two sets of vertically arranged slide rails 9 are provided between the two columns 2 and below the assembly frame 4. The slide rails 9 are elongated structures, and their ends are fixedly connected to the base 1. Each set of slide rails 9 has a slider 10 slidably connected to it. The inner wall of the slider 10 fits against the outer wall of the slide rail 9, and the slider 10 can move freely up and down along the slide rail 9. A sliding plate 11 is fixedly connected between the two sets of sliders 10. The sliding plate 11 is a flat plate structure or an arc-shaped plate structure, and its curvature is adapted to the curvature of the outer wall of the heat exchanger shell.

[0024] Specifically, the inner wall of the slide plate 11 is provided with a wear-resistant rubber pad. By adjusting the position of the slider 10 on the slide rail 9, the slide plate 11 can be moved vertically, so that the inner wall of the slide plate 11 is tightly fitted with the outer wall of the heat exchanger shell in the bearing port 12, thereby strengthening and fixing the heat exchanger shell and preventing vertical displacement of the shell during the welding process.

[0025] In addition, the assembly frame 4 is a frame structure and is equipped with locking bolts. The assembly frame 4 is fixedly connected to the column 2 by the locking bolts, and the height of the welding device 8 can be adjusted by adjusting the vertical height of the assembly frame 4.

[0026] In this technical solution, the inner wall of the assembly frame 4 is fitted with the outer wall of the column 2, and the locking bolts penetrate the side wall of the assembly frame 4 and abut against the column 2. By tightening the locking bolts, the assembly frame 4 can be fixed at a specified height position on the column 2.

[0027] The assembly frame 4 has a support plate 5 fixedly mounted in the middle. The support plate 5 is an L-shaped flat plate structure. A telescopic cylinder 6 is fixedly mounted on the upper surface of the support plate 5. The output end of the telescopic cylinder 6 is vertically downward and extends through the support plate 5 to the bottom. A flange 7 is bolted to the output end of the telescopic cylinder 6. The flange 7 is a circular plate structure. A welding device 8 is bolted to its lower surface. The welding head of the welding device 8 is vertically downward and aligned with the center of the bearing port 12. The telescopic cylinder 6 can drive the welding device 8 to move up and down vertically, achieving precise adjustment of the welding height.

[0028] Using the above technical solution, in use, firstly, adjust the height of the assembly frame 4 on the column 2 according to the specifications and dimensions of the heat exchanger shell, and then fix the assembly frame 4 with locking bolts. Next, place the heat exchanger shell into the bearing port 12 of the bearing seat 3, and use the elastic anti-slip pad on the inner wall of the bearing port 12 for initial fixation. Then, adjust the position of the slider 10 on the slide rail 9, causing the sliding plate 11 to descend to a position where it fits against the outer wall of the heat exchanger shell, thus achieving reinforced fixation of the shell. Activate the telescopic cylinder 6 to drive the welding device 8 to descend to the designated welding height, align it with the welding area between the tube sheet and the shell, and start the welding operation. During welding, the height of the welding device 8 can be adjusted in real time using the telescopic cylinder 6 to ensure welding quality. For heat exchanger shells of different specifications, only the height of the assembly frame 4 and the position of the sliding plate 11 need to be adjusted to complete the adaptation and fixation, without the need to change special clamps.

[0029] It should be noted that, in this technical solution, the welding device 8 mentioned above is the welding execution component of this heat exchanger tube sheet welding device. It adopts an existing mature gas metal arc welding machine, which is a highly efficient welding equipment widely used in the industrial field and is specifically adapted to the welding scenario of heat exchanger tube sheets and shells. Specifically, it includes a welding host and a welding head. The welding host has a built-in welding power supply, wire feeding mechanism and control system, which can accurately adjust parameters such as welding current, voltage, and wire feeding speed to adapt to the welding needs of heat exchanger tube sheets and shells of different thicknesses and materials. The welding head is a replaceable welding torch, which is equipped with a conductive tip and a shielding gas nozzle. During welding, it can deliver welding wire and shielding gas to ensure a stable welding arc and prevent the molten pool from being oxidized by air. During operation, the welding host converts industrial AC power into DC power or pulsed current suitable for welding, and delivers the welding current to the welding head through a cable. The wire feeding mechanism feeds the welding wire through the wire feeding tube to the contact nozzle of the welding head at a set speed. The welding wire forms an electric arc with the parts to be welded on the heat exchanger tube sheet and shell. The high temperature generated by the electric arc melts the welding wire and the metal to be welded, forming a molten pool. At the same time, the shielding gas nozzle sprays shielding gas to prevent air from eroding the molten pool. As the welding process progresses, the molten pool cools and solidifies to form a strong weld, achieving a sealed connection between the tube sheet and the shell.

[0030] Specifically, during implementation, the welding device 8 is fixed to the output end of the telescopic cylinder 6 via the flange 7, and the center line of the welding head is precisely aligned with the center line of the bearing port 12 to ensure the accuracy of the welding position.

[0031] Using the above solution, during implementation, the support base 3 is first fixed to the base 1 with M20 bolts, and rust-preventive sealant is applied to the connecting surfaces. The bottom end of the column 2 is welded to the support base 3, with a fillet weld at the weld. The assembly frame 4 is fitted onto the column 2, and anti-slip pressure blocks are installed at the ends of the locking bolts to enhance the fixing effect. The support plate 5 is fixed to the assembly frame 4 by welding, and the weld is inspected for flaws to ensure the connection strength. The telescopic cylinder 6 is fixed to the support plate 5 with bolts, and shock-absorbing pads are provided on the mounting surface. The flange 7 is connected to the output end of the telescopic cylinder 6 with M12 bolts, and the number of bolts is evenly distributed.

[0032] Meanwhile, the welding device 8 is fixed to the flange 7 with bolts, and the center line of the welding head coincides with the center line of the bearing port 12. The two ends of the slide rail 9 are welded and fixed to the base 1 and the crossbeam respectively, and the crossbeam is welded and connected to the top of the column 2 to form a stable frame structure. The slider 10 and the slide plate 11 are fixed by welding, and the arc surface of the slide plate 11 is machined to ensure a good fit with the heat exchanger shell.

[0033] During use, loosen the locking bolts on the assembly frame 4 according to the height of the heat exchanger shell, adjust the height of the assembly frame 4 so that the initial position of the welding device 8 is 50-100mm away from the welding area, and then tighten the locking bolts to fix it. Place the heat exchanger shell into the bearing port 12, with the bottom end of the shell fitting against the bottom of the bearing port 12. Push the slider 10 down along the slide rail 9 so that the inner wall of the slide plate 11 fits tightly against the outer wall of the shell, and the height of the slide plate 11 is located in the middle of the shell to ensure fixed balance. Start the telescopic cylinder 6, adjust the height of the welding device 8 so that the distance between the welding head and the welding area is 10-15mm, turn on the power and shielding gas of the welding device 8, set the welding parameters, and start welding. During welding, adjust the height of the welding device 8 slowly through the telescopic cylinder 6 according to the welding progress to ensure uniform welding quality. After welding is completed, turn off the welding device 8, raise the welding device 8 and the slide plate 11, remove the welded heat exchanger shell, and complete the operation.

[0034] In summary, by utilizing the above-mentioned technical solution of this invention, a stable support foundation is formed by the base and column. The bearing port of the bearing seat achieves the initial horizontal limitation of the heat exchanger shell. Combined with the slide rail and the sliding plate driven by the slider, it fits tightly against the outer wall of the shell in the vertical direction to form a double fixation, effectively preventing the shell from shifting or moving during welding, ensuring the coaxiality of the welding part and the uniformity of the weld, and greatly improving the welding accuracy. The assembly frame can be flexibly adjusted in height along the column and fixed with bolts. The sliding plate can rise and fall freely along the slide rail with the slider. It can adapt to heat exchanger shells of different specifications without changing special fixtures, significantly enhancing the versatility of the device and reducing equipment investment and replacement costs. The telescopic cylinder linkage flange and the electric welding device perform precise vertical adjustment. With the height preset of the assembly frame, welding positioning can be completed quickly, simplifying the operation process, improving welding efficiency, and ensuring that the welding head is always aligned with the part to be welded, ensuring the stability and consistency of welding quality, and meeting the high efficiency and high precision requirements of batch processing of heat exchangers in industrial production.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Those skilled in the art, upon considering the disclosure in the specification and embodiments, will readily conceive of other embodiments of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0036] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A heat exchanger tube sheet welding apparatus, characterized by, Include: Base (1) and set on one side of the base (1) symmetrical column (2), the bottom end of the column (2) is provided with a bearing seat (3), the bearing seat (3) is fixedly connected with the base (1), the column (2) is movably provided with an assembly frame (4), the assembly frame (4) is fixedly provided with a support plate (5), the support plate (5) is provided with a telescopic cylinder (6), the output end of the telescopic cylinder (6) penetrates the support plate (5) and is connected with a flange plate (7), the bottom end of the flange plate (7) is provided with an electric welding device (8).

2. The heat exchanger tube sheet welding apparatus of claim 1, wherein, The bearing seat (3) is provided with a bearing port (12), the bearing port (12) is a circular groove structure, and the diameter of the bearing port (12) is adapted to the outer diameter size of the heat exchanger shell, so as to place the heat exchanger shell on the bearing port (12) for fixing.

3. The heat exchanger tube sheet welding apparatus of claim 1, wherein, The two groups of vertical slide rails (9) are arranged between the columns (2) and are adapted to the bearing seat (3), the slide rails (9) are movably provided with slide blocks (10), and the slide blocks (10) are connected with a slide plate (11).

4. The heat exchanger tube sheet welding apparatus of claim 3, wherein, The bottom end of the column (2) is fixedly connected with the base (1), the slide plate (11) is provided with a plurality of assembly holes and is adapted to the outer wall of the heat exchanger shell, the slide plate (11) is movably lifted along the slide rail (9) through the slide block (10), is used for adjusting the range to adapt to heat exchanger shells of different height specifications, and the slide plate (11) is matched with the bearing port (12) to realize the horizontal and vertical double limiting fixing of the heat exchanger shell.

5. The heat exchanger tube sheet welding apparatus of claim 4, wherein, The slide plate (11) is an arc plate structure, and the arc is adapted to the arc of the outer wall of the heat exchanger shell, and the inner wall of the slide plate (11) is provided with a wear-resistant rubber pad.

6. The heat exchanger tube sheet welding apparatus of claim 1, wherein, The assembly frame (4) is a frame structure, and the assembly frame (4) is provided with locking bolts, the assembly frame (4) is fixedly connected with the column (2) through the locking bolts, and the height of the electric welding device (8) is adjusted by adjusting the vertical height of the assembly frame (4).

7. The heat exchanger tube sheet welding apparatus of claim 6, wherein, The support plate (5) is an L-shaped flat plate structure, the output end of the telescopic cylinder (6) is vertically downward, and the flange plate (7) is a circular plate structure fixedly connected with the output end of the telescopic cylinder (6) through bolts.

8. The heat exchanger tube sheet welding apparatus of claim 1, wherein, The electric welding device (8) is a gas shielded welding machine, and the electric welding device (8) is fixedly connected with the lower surface of the flange plate (7) through bolts, the welding head is vertically downward and is aligned with the center position of the bearing port (12).

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