A welding and straightening device for super-large heat exchanger

Abstract

The utility model discloses a kind of super-large heat exchanger welding correction devices, it is related to heat exchanger coil field, including fixed plate, first movable plate and second movable plate, the second movable plate is slidably connected with first movable plate, and both are locked and fixed by adjusting bolt, the end of both first movable plate and second movable plate mutually far away is fixedly connected with a fixed plate, wherein, fixed plate on first movable plate is installed with the end plate snap groove type outside heat exchanger, fixed plate on second movable plate is installed with the baffle snap groove type in the middle of heat exchanger.The utility model is aimed at the plate / tube heat exchanger of diameter in nuclear power, chemical industry etc. field is greater than or equal to 3m, integrates welding positioning, deformation correction and heat dissipation control function, solves the problem such as welding deformation, low correction efficiency in traditional process.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger coils, and specifically to a welding straightening device for ultra-large heat exchangers. Background Technology

[0002] Coil units are generally composed of copper tubing and aluminum foil. Because copper itself has high value, existing scrap coil units can be recycled. However, when welding copper tubing, the temperature can reach 500-600℃. When the copper tubing is over 3 meters long and the overall coil height is over 1 meter, the sheet metal securing the copper tubing and aluminum foil is extremely prone to severe deformation during welding, especially when the sheet metal is made of stainless steel. If the entire coil unit deforms severely, it will be unusable, resulting in significant losses. Traditional reinforcement methods involve thickening the sheet metal, which greatly increases costs.

[0003] Therefore, it is necessary to develop a device for correcting large coils, which can ensure that the cost of the coil itself does not increase and that the overall structure of the coil is not deformed during welding. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a welding correction device for ultra-large heat exchangers. It is designed for plate / tube heat exchangers with a diameter ≥3m in fields such as nuclear power and chemical industry. It integrates welding positioning, deformation correction and heat dissipation control functions, and solves the problems of large welding deformation and low correction efficiency in traditional processes.

[0005] The purpose of this utility model is achieved through the following technical solution: This ultra-large heat exchanger welding correction device includes a fixed plate, a first movable plate and a second movable plate. The second movable plate is slidably connected to the first movable plate, and the two are locked and fixed by adjusting bolts. A fixed plate is fixedly connected to the ends of the first movable plate and the second movable plate that are far apart from each other. The fixed plate on the first movable plate is installed in a slotted manner with the end plate on the outside of the heat exchanger, and the fixed plate on the second movable plate is installed in a slotted manner with the protective plate in the middle of the heat exchanger.

[0006] As a further technical solution, both the first and second movable plates have adjustment grooves at their respective sliding ends. Adjustment bolts pass through the adjustment grooves of both plates in sequence and are locked in place, so that the distance between the fixed plates of the two plates matches the distance between the end plate and the guard plate.

[0007] As a further technical solution, two parallel vertical adjustment grooves are provided on the first movable plate, and two adjustment grooves are also provided at corresponding positions on the second movable plate.

[0008] As a further technical solution, both the first movable plate and the second movable plate adopt a structure with a "匚"-shaped cross-section, and the inner wall spacing of the first movable plate is greater than or equal to the outer wall spacing of the second movable plate, so that the second movable plate slides along the inner wall of the first movable plate.

[0009] As a further technical solution, the fixed plate comprises oppositely arranged short sides and long sides, which are fixedly connected by a connecting part to form a structure with a "J"-shaped cross-section.

[0010] As a further technical solution, screw holes are provided on both the end plate and the protection plate, and screw holes are also provided on the long side. After the fixed plate is clamped into the end plate or the protection plate, the long side is matched and fixed with the screw holes on the end plate or the protection plate through locking bolts.

[0011] As a further technical solution, after the fixed plate is clamped into the end plate or the protection plate, the long side faces inward and the short side faces outward.

[0012] As a further technical solution, one set of said correction device is installed on each of the left and right sides of the air inlet side and the air outlet side of the heat exchanger.

[0013] The beneficial effects of the present utility model are: 1. The first movable plate and the second movable plate can slide relative to each other and are fixed by adjusting bolts, so that the spacing between the fixed plates on the two can be freely adjusted to adapt to heat exchangers of different specifications (different spacing between end plates and protection plates); 2. The fixed plate is installed with the end plates and protection plates in a clamping groove mode and fixed with locking bolts, which can improve the dimensional accuracy of the coil after welding, reduce the labor intensity of manual correction, shorten the production cycle, improve product consistency and quality stability. Meanwhile, it is convenient to disassemble and can be reused for many times; 3. After the fixed plate is clamped into the end plate or the protection plate, the long side faces inward and the short side faces outward (that is, the outward-facing side is shorter), which can prevent the fixed plate from interfering with the water inlet and outlet of the collecting pipe and ensure normal welding. Description of Drawings

[0014] Figure 1 is a front structural schematic diagram of the present utility model.

[0015] Figure 2 is a top structural schematic diagram of the present utility model.

[0016] Figure 3 is a structural schematic diagram of the first movable plate and the second movable plate when assembled in the present utility model Figure 1 .

[0017] Figure 4 is a structural schematic diagram of the first movable plate and the second movable plate when assembled in the present utility model Figure 2 .

[0018] Figure 5 This is a schematic diagram of the structure of the fixing plate in this utility model.

[0019] Figure 6 This is a schematic diagram of the main structure of the present invention after assembly with a heat exchanger.

[0020] Figure 7 This is a schematic diagram of the left side of the structure after the present invention is assembled with the heat exchanger.

[0021] Figure 8 This is a top view of the structure of the present invention after assembly with a heat exchanger.

[0022] Figure 9 for Figure 8 A magnified view of a portion of region A in the middle.

[0023] Explanation of reference numerals in the attached drawings: Fixed plate 1, short side 11, long side 12, connecting part 13, first movable plate 2, adjusting bolt 3, second movable plate 4, adjusting groove 5, heat exchanger 6, end plate 61, protective plate 62, collecting pipe 63, water inlet 631, water outlet 632, copper pipe 64, locking bolt 7. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings: Example: As attached Figures 1-9 As shown, this ultra-large heat exchanger welding correction device is installed on the heat exchanger 6 and includes a fixed plate 1, a short side 11, a long side 12, a connecting part 13, a first movable plate 2, an adjusting bolt 3, a second movable plate 4, an adjusting groove 5, a heat exchanger 6, an end plate 61, a protective plate 62, a collecting pipe 63, a water inlet 631, a water outlet 632, a copper pipe 64, and a locking bolt 7.

[0025] Reference Appendix Figure 2 , 3 4. During assembly, the second movable plate 4 is slidably connected to the first movable plate 2, and the two are locked and fixed by adjusting bolts 3. Furthermore, both the first movable plate 2 and the second movable plate 4 have adjusting grooves 5 at their respective sliding ends. The adjusting bolts 3 pass through the adjusting grooves 5 of the two plates in sequence and are locked and fixed, so that the distance between the fixing plates 1 of the two plates matches the distance between the end plate 61 and the guard plate 62, which can accommodate heat exchangers 6 of different specifications (i.e., different distances between the end plate 61 and the guard plate 62). Preferably, the first movable plate 2 has two vertically parallel adjusting grooves 5, and the second movable plate 4 also has two adjusting grooves 5 at corresponding positions to ensure stability after locking.

[0026] like Figure 4As shown, both the first movable plate 2 and the second movable plate 4 adopt a structure with a "匚"-shaped cross section, and the inner wall spacing of the first movable plate 2 is greater than or equal to the outer wall spacing of the second movable plate 4, so that the second movable plate 4 can slide along the inner wall of the first movable plate 2, which facilitates spacing adjustment.

[0027] As Figure 2 shown, a fixing plate 1 is fixedly connected to each of the ends of the first movable plate 2 and the second movable plate 4 that are away from each other, wherein the fixing plate 1 on the first movable plate 2 is mounted in a clamping groove manner with the end plate 61 outside the heat exchanger 6, and the fixing plate 1 on the second movable plate 4 is mounted in a clamping groove manner with the guard plate 62 in the middle of the heat exchanger 6, as Figure 6 , 8 shown.

[0028] With reference to the attached Figure 5 drawings, the fixing plate 1 comprises a short side 11 and a long side 12 which are oppositely arranged, and the two are fixedly connected through a connecting portion 13, forming a structure with an approximately "J"-shaped cross section. As Figure 8 , 9 shown, screw holes are provided on both the end plate 61 and the guard plate 62, and screw holes are also provided on the long side 12 of the fixing plate 1. After the fixing plate 1 is clamped into the end plate 61 or the guard plate 62, the long side 12 is fixedly matched with the screw holes on the end plate 61 or the guard plate 62 through locking bolts 7. As Figure 6 , 7 and 8 shown, preferably, after the fixing plate 1 is clamped into the end plate 61 or the guard plate 62, keeping the long side 12 inward and the short side 11 outward can prevent the fixing plate 1 from interfering with the water inlet 631 and the water outlet 632 of the collecting pipe 63.

[0029] Preferably, one set of straightening device is installed on each of the left and right sides of the air inlet side and the air outlet side of the heat exchanger 6, as Figure 8 shown, the straightening devices are located at four corners of the heat exchanger 6 in a top view, which can significantly improve the welding quality and production efficiency of super-large heat exchangers, and are suitable for high-end equipment manufacturing fields such as nuclear power and chemical industry.

[0030] The working process of the present utility model is: During welding straightening, firstly, the first movable plate 2 and the second movable plate 4 are welded and fixed to the corresponding fixed plate 1. Then, the second movable plate 4 is inserted into the first movable plate 2, and slidably adjusted according to the distance between the end plate 61 and the guard plate 62. After adjusting to the appropriate length, the fixed plate 1 is inserted into the corresponding end plate 61 and guard plate 62, keeping the long side 12 facing inward and the short side 11 facing outward to prevent interference between the fixed plate 1 and the inlet 631 and outlet 632 of the collecting pipe 63. Next, the adjusting bolts 3 are passed through the adjusting grooves 5 of the first movable plate 2 and the second movable plate 4 in sequence and locked in place. Then, the locking bolts 7 are passed through the long side 12 of the fixed plate 1, thereby engaging with the screw holes on the end plate 61 or the guard plate 62 to complete the fixed installation of the straightening device and the heat exchanger 6. In addition, a set of straightening devices is installed on each of the left and right sides of the air inlet and outlet sides of the heat exchanger 6, such as... Figure 8 As shown, in a top-down view, the straightening device is located at the four corners of the heat exchanger 6. It can significantly improve the welding quality and production efficiency of ultra-large heat exchangers and is suitable for high-end equipment manufacturing fields such as nuclear power and chemical industry. After the straightening device is installed, the welding of the collection tube 63 and the copper tube 64 can begin. After welding is completed, loosen the locking bolt 7 and the adjusting bolt 3, and remove the entire straightening device from the heat exchanger 6 for later use.

[0031] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this utility model should fall within the protection scope of the appended claims.

Claims

1. A welding straightening device for an ultra-large heat exchanger, used for installation on a heat exchanger (6), characterized in that: It comprises a fixed plate (1), a first movable plate (2) and a second movable plate (4), wherein the second movable plate (4) is slidably connected to the first movable plate (2), and the two are locked and fixed by an adjusting bolt (3). One end, away from each other, of the first movable plate (2) and the second movable plate (4) is fixedly connected with one fixed plate (1), wherein the fixed plate (1) on the first movable plate (2) is installed in a clamping slot manner with an end plate (61) on the outer side of a heat exchanger (6), and the fixed plate (1) on the second movable plate (4) is installed in a clamping slot manner with a guard plate (62) in the middle of the heat exchanger (6).

2. The welding straightening device for ultra-large heat exchangers according to claim 1, characterized in that: Adjusting grooves (5) are respectively formed at the opposite sliding ends of the first movable plate (2) and the second movable plate (4), and the adjusting bolt (3) sequentially passes through the adjusting grooves (5) of the two movable plates and is locked and fixed, so that the distance between the fixed plates (1) on the two movable plates matches the distance between the end plate (61) and the guard plate (62).

3. The welding straightening device for ultra-large heat exchangers according to claim 2, characterized in that: Two vertically parallel adjusting grooves (5) are formed on the first movable plate (2), and two adjusting grooves (5) are also formed at corresponding positions on the second movable plate (4).

4. The welding straightening device for ultra-large heat exchangers according to claim 1, characterized in that: Each of the first movable plate (2) and the second movable plate (4) adopts a structure with a "匚"-shaped cross section, and the inner wall spacing of the first movable plate (2) is greater than or equal to the outer wall spacing of the second movable plate (4), so that the second movable plate (4) slides along the inner wall of the first movable plate (2).

5. The welding straightening device for ultra-large heat exchangers according to claim 1, characterized in that: The fixed plate (1) comprises a short side (11) and a long side (12) which are arranged oppositely, and the short side and the long side are fixedly connected by a connecting portion (13), forming a structure with a "J"-shaped cross section.

6. The welding straightening device for ultra-large heat exchangers according to claim 5, characterized in that: Screw holes are formed on both the end plate (61) and the guard plate (62), and screw holes are also formed on the long side (12). After the fixed plate (1) is clamped into the end plate (61) or the guard plate (62), the long side (12) is matched and fixed with the screw holes on the end plate (61) or the guard plate (62) through a locking bolt (7).

7. The welding straightening device for ultra-large heat exchangers according to claim 6, characterized in that: After the fixed plate (1) is clamped into the end plate (61) or the guard plate (62), the long side (12) faces inward and the short side (11) faces outward.

8. The welding straightening device for ultra-large heat exchangers according to claim 1, characterized in that: One set of the correcting device is installed on each of the left and right sides of the air inlet side and the air outlet side of the heat exchanger (6).

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