Full-automatic production line for welding plate heat exchanger

Abstract

The utility model discloses a full-automatic production line for welding a plate heat exchanger, and relates to the technical field of heat exchangers. A feeding port of the steel belt leveling machine is connected with a discharging port of the uncoiling machine, and the steel belt leveling machine is used for leveling the unfolded steel belt; the forming device is used for manufacturing the steel belt into a sheet; the punching machine is used for cutting off the sheet in a fixed-length mode; the single sheet leveling machine is used for leveling the sheet; the sheet combining machine is used for combining the two sheets; the tack welding equipment is used for spot welding of the long edges of the two plates; the first welding equipment is used for welding long side seams of the two plate sheets to form a plate tube; the flaw detection equipment is used for carrying out welding seam detection on the plate tube; the chip stacking machine is used for automatically stacking the plate tubes; the second welding equipment is used for welding the plate tubes and the plate tubes as well as the plate tubes and the comb plates; the device further comprises a feeding machine. By using the production line, the productivity can be effectively improved, the product quality is improved, the occupied area for production is saved, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and more specifically, to a fully automatic production line for welded plate heat exchangers. Background Art

[0002] In today's increasingly tight land resources situation, the space left for circulating water cooling equipment in new construction and expansion projects is very limited. Traditional wet cooling coils have problems such as low heat transfer efficiency, large footprint, high flow resistance in the tube, and poor winter antifreeze. In order to solve the problems of current wet heat exchangers, a welding plate heat exchanger cooling technology with high heat transfer efficiency, compact structure, small flow resistance in the tube, and high antifreeze performance is gradually being promoted and applied.

[0003] The plate heat exchanger has the following advantages: First, the positive and negative indentation enhancement technology of the narrow flow channel plate tube is adopted, that is, the heat transfer inside and outside the plate tube is enhanced, the heat exchange area of ​​the plate tube is increased, and the strength of the plate tube is improved. By optimizing the design of the plate tube flow channel size and strengthening the plate by indentation, the comprehensive heat exchange performance of the plate heat exchanger is greatly improved; second, the long side direction of the plate bundle is densely covered with positive and negative protrusions. The positive protrusions of the plate bundle overlap each other to form the air channel side, and the reverse protrusions of the plate bundle overlap each other to form the water channel side. The spacing between the plate and the tube is small, and more plate bundles can be arranged in the same space; third, the flow cross-section of the plate tube is large, and the flow velocity in the tube is controlled within the range of 0.2 to 0.6 m / s. The corresponding pressure drop in the tube is small, which reduces the power consumption of the circulating water pump; fourth, the cross-sectional shape of the plate tube is similar to a narrow ellipse. Slight freezing in the tube will only cause a slight deformation, which improves the overall antifreeze performance of the plate heat exchanger; fifth, the welded plate heat exchanger is suitable for multiple scenarios such as dry air cooling, wet air cooling, and evaporative air cooling.

[0004] However, the traditional plate heat exchanger production adopts the process route of hydraulic plate forming and manual welding. The hydraulic press pressure forming speed is slow, and the production cycle is less than 2m / min; the plate heat exchanger welding belongs to the thin plate welding category (plate thickness 0.6~1.2mm), and manual argon arc welding is difficult (on the one hand, the thin plate has slow heat dissipation, the welding area temperature is high, and the weld is prone to oxidation; on the other hand, the manual welding speed is too fast, the gas protection effect is not good, the weld is prone to oxidation, and the welding speed is too slow, which may cause defects such as undercut and burn-through) and the welding speed is less than 0.3m / min. The above reasons lead to low production efficiency and poor quality stability of traditional production lines.

[0005] In summary, how to improve the production efficiency and quality stability of plate heat exchangers is a problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a fully automatic production line for welded plate heat exchangers, which can effectively improve productivity, enhance product quality, save production floor space, and save production costs.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A fully automatic production line for welding plate heat exchangers, comprising:

[0009] Uncoiler, which is used to open the steel strip coil;

[0010] A steel strip leveling machine, whose feed port is connected to the discharge port of the uncoiler and is used for leveling the steel strip;

[0011] A forming device, which is used to form the steel strip into a sheet;

[0012] A punching machine, which is used to cut the plate to a fixed length;

[0013] A single-sheet leveling machine, which is used to level the sheet;

[0014] A sheet-assembling machine, which is used to assemble two of the sheets;

[0015] A spot welding device, which is used to spot weld the long sides of the two plates;

[0016] A first welding device, which is used to weld the long sides of two plates to form a plate tube;

[0017] A flaw detection device, which is used to perform weld inspection on the plate tube;

[0018] A stacking machine, which is used to automatically stack the plate tubes to form a plate bundle;

[0019] a second welding device for welding the plate bundle;

[0020] It also includes a feeder, which is used to make the steel strip pass through the steel strip leveling machine and the forming device in sequence, make the plate pass through the punching machine, the single-piece leveling machine, the sheet assembly machine, the spot welding equipment, the first welding equipment, the flaw detection equipment and the chip machine in sequence, and make the plate bundle pass through the second welding equipment.

[0021] In one embodiment, the forming device is a high-speed punch press.

[0022] In one embodiment, the first welding device is a long-side double-head welder using resistance roll welding.

[0023] In one embodiment, the steel strip leveling machine is a high-precision leveling machine with a guiding device.

[0024] In one embodiment, the feeder is a plate leveling machine driven by a servo motor.

[0025] In one embodiment, the single-chip leveling machine is a high-precision leveling machine provided with a conveying platform.

[0026] In one embodiment, the spot welding equipment is a double-head spot welding machine.

[0027] In one embodiment, the flaw detection equipment is an online automatic eddy current flaw detector.

[0028] In one embodiment, the chip machine includes an automated manipulator, an anti-fall mechanism, and an automatic chip machine driven by a servo motor.

[0029] In one embodiment, the second welding equipment includes a plasma fully automatic welding machine and a fully automatic laser welding machine, the plasma fully automatic welding machine is used to weld the straight weld at the end of the plate bundle, and the fully automatic laser welding machine is used to weld the herringbone weld at the end of the plate bundle.

[0030] When using the fully automatic production line of the welded plate heat exchanger provided by the utility model, first, the steel strip coil is placed on the unwinding machine to open the steel strip coil through the unwinding machine, and then the steel strip leveling machine can level the unfolded steel strip, and then the forming device makes the steel strip into plates, and the punching machine cuts the steel strip according to the set size, and cuts the plates into plates of the required size, and then the single-piece leveling machine can level the plates, and then the two plates are combined by the sheet-joining machine to make the two plates pair. Subsequently, the long sides of the two plates can be spot-welded by the spot welding equipment, and then the long sides of the two plates are seam-welded by the first welding equipment to form a plate tube. Afterwards, the weld seams of the plate tubes are inspected by the flaw detection equipment. If the weld seam inspection results of the plate tubes meet the requirements, the plate tubes are automatically stacked by the stacking machine to form a plate bundle. If the weld seam inspection results of the plate tubes do not meet the requirements, the plate tubes do not need to be stacked. Finally, the plate bundles can be welded by the second welding equipment to manufacture the required plate heat exchanger. During this period, the feeder can make the steel strip pass through the steel strip leveling machine and the forming device in sequence, make the plate pass through the punching machine, single-piece leveling machine, sheet joining machine, spot welding equipment, first welding equipment, flaw detection equipment and code machine in sequence, and make the plate bundle pass through the second welding equipment.

[0031] This production line overcomes the shortcomings of traditional production lines and provides a fully automatic production line for welded plate heat exchangers, which can effectively improve productivity, enhance product quality, save production floor space, and save production costs.

[0032] In summary, the fully automatic production line of the welded plate heat exchanger provided by the utility model can effectively improve productivity, enhance product quality, save production floor space, and save production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a fully automatic production line for a welded plate heat exchanger provided by the utility model;

[0035] Figure 2 This is a schematic diagram of the long side weld of the plate and tube of the plate heat exchanger;

[0036] Figure 3 Schematic diagram of the weld at the end of the plate bundle of a plate heat exchanger.

[0037] Figure 1-Figure 3 middle:

[0038] 1 is an unwinder, 2 is a steel strip leveler, 3 is a feeder, 4 is a forming device, 5 is a punching machine, 6 is a single-piece leveler, 7 is a sheet joining machine, 8 is a spot welding device, 9 is a first welding device, 10 is a flaw detection device, 11 is a code chip machine, 12 is a second welding device, 13 is a plate tube, 14 is a plate, 15 is a plate bundle, 16 is a herringbone weld, 17 is a straight weld, 18 is a comb plate, and 19 is a tube plate. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The core of the utility model is to provide a fully automatic production line for welded plate heat exchangers, which can effectively improve productivity, enhance product quality, save production floor space, and save production costs.

[0041] Please refer to Figures 1 to 3 , Figure 1 A schematic diagram of the structure of a fully automatic production line for a welded plate heat exchanger provided by the utility model; Figure 2 This is a schematic diagram of the long side weld of the plate and tube of the plate heat exchanger; Figure 3 Schematic diagram of the weld at the end of the plate bundle of a plate heat exchanger.

[0042] This specific embodiment provides a fully automatic production line for welding plate heat exchangers, including:

[0043] An uncoiler 1, which is used to uncoil the steel strip;

[0044] A steel strip leveling machine 2, whose feed port is connected to the discharge port of the uncoiler 1, and is used for leveling the steel strip unwound from the steel strip coil;

[0045] A forming device 4 for forming a steel strip into a sheet 14;

[0046] A punching machine 5, which is used to cut the plate 14 to a fixed length;

[0047] A single-sheet leveling machine 6 for leveling the sheet 14;

[0048] A sheet-joining machine 7, which is used to assemble two sheets 14;

[0049] A spot welding device 8, which is used to spot weld the long sides of two plates 14;

[0050] A first welding device 9, which is used to weld the long sides of two plates 14 to form a plate tube 13;

[0051] A flaw detection device 10, which is used to perform weld inspection on the plate tube 13;

[0052] A stacking machine 11, which is used to automatically stack the board tubes 13 to form a board bundle 15;

[0053] A second welding device 12 for welding a plate bundle 15;

[0054] It also includes a feeder 3, which is used to make the steel strip pass through the steel strip leveling machine 2 and the forming device 4 in sequence, and make the plate 14 pass through the punching machine 5, the single-piece leveling machine 6, the sheet assembly machine 7, the spot welding equipment 8, the first welding equipment 9, the flaw detection equipment 10 and the code machine 11 in sequence, and make the plate bundle 15 pass through the second welding equipment 12.

[0055] It should be noted that the uncoiler 1 can be set as an uncoiler 1 with automatic control. The punching machine 5 is set as a punching machine 5 with automatic control. The second welding device 12 is used to weld the plate bundle 15, which can refer to welding the plate tubes 13 and the plate tubes 13 of the plate bundle 15 through the second welding device 12, and welding the plate tubes 13 and the comb plate 18 of the plate bundle 15, wherein the comb plate 18 (plate thickness is about 6mm) is equivalent to the transition plate. The use of thinner plates is easier to achieve the sawtooth shape and reduce the processing cost. At the same time, it is easier to ensure the strength of the weld with the tube sheet 19 (plate thickness is about 20mm). The tube sheet 19 is connected to the heat exchanger header by a flange, and the tube sheet 19 has a pressure-bearing function.

[0056] In actual use, according to actual conditions and actual needs, the shapes, structures, types, etc. of the uncoiler 1, the steel strip leveling machine 2, the feeder 3, the forming device 4, the punching machine 5, the single-piece leveling machine 6, the sheet joining machine 7, the spot welding equipment 8, the first welding equipment 9, the flaw detection equipment 10, the code chip machine 11 and the second welding equipment 12 can be determined.

[0057] When using the fully automatic production line of the welded plate heat exchanger provided by the utility model, first, the steel strip coil is placed on the uncoiler 1 to open the steel strip coil through the uncoiler 1, and then the steel strip leveler 2 can level the unfolded steel strip, and then the forming device 4 forms the steel strip into a plate 14, and the punching machine 5 cuts the steel strip according to the set size, and cuts the plate 14 into plates 14 of the required size, and then the single-piece leveler 6 can level the plate 14, and then the sheet-joining machine 7 is used to merge the two plates 14 and make the two plates 14 a pair. Subsequently, the long sides of the two plates 14 can be spot-welded by the spot welding device 8, and then the long sides of the two plates 14 can be seam-welded by the first welding device 9 to form the plate tube 13. Afterwards, the plate tube 13 is inspected for welds by the flaw detector 10. If the weld inspection result of the plate tube 13 meets the requirements, the plate tube 13 is automatically stacked by the chip machine 11 to form a plate bundle 15. If the weld inspection result of the plate tube 13 does not meet the requirements, the plate tube 13 does not need to be stacked. Finally, the plate bundle 15 can be welded by the second welding device 12 to manufacture the required plate heat exchanger. During this period, the feeder 3 can make the steel strip pass through the steel strip leveling machine 2 and the forming device 4 in sequence, and make the plate 14 pass through the punching machine 5, the single-piece leveling machine 6, the chip machine 7, the spot welding device 8, the first welding device 9, the flaw detector 10 and the chip machine 11 in sequence, and make the plate bundle 15 pass through the second welding device 12.

[0058] This production line overcomes the shortcomings of traditional production lines and provides a fully automatic production line for welded plate heat exchangers, which can effectively improve productivity, enhance product quality, save production floor space, and save production costs.

[0059] In summary, the fully automatic production line of the welded plate heat exchanger provided by the utility model can effectively improve productivity, enhance product quality, save production floor space, and save production costs.

[0060] In one embodiment, the forming device 4 is a high-speed punch press.

[0061] It should be noted that the present application can use a high-speed punch press to punch the sheet 14, and the maximum punching speed can reach 25m / min. The subsequent sheet 14 assembly and long side resistance rolling welding speed is 3m / min. Therefore, a high-speed punch press can meet at least 7 sheet 14 assembly and resistance rolling welding production lines, and efficiently provide sheet 14 raw materials for the automatic assembly of sheet tubes 13, saving equipment investment and production space.

[0062] In one embodiment, the first welding device 9 is a long side double-head welder using resistance rolling welding, that is, the long side seam welding of the plate 14 can be performed using a high-precision output, energy-saving long side double-head welder.

[0063] In one embodiment, the flaw detection device 10 is an online automatic eddy current flaw detector.

[0064] It should be noted that the long side welds of the plate 14 after being assembled are thin plate welds, using high-efficiency resistance rolling welding equipment and equipped with an online automatic eddy current flaw detector. After the welding is cooled, the welds are automatically checked for defects such as incomplete penetration, inclusions, and pores, thereby improving welding efficiency and reducing the risk of leakage of the plate tube 13 caused by human factors.

[0065] In one embodiment, the steel strip leveling machine 2 is a high-precision leveling machine with a guiding device to ensure that the steel strip is effectively leveled after being unfolded.

[0066] In one embodiment, the feeder 3 is a plate leveling machine driven by a servo motor to ensure accurate conveying of the plate 14 .

[0067] In one embodiment, the single-chip leveling machine 6 is a high-precision leveling machine with a conveying platform to ensure the leveling effect of the plate 14. At this time, the plate 14 can be conveyed from the single-chip leveling machine 6 to the sheet assembly machine 7 by the conveying platform provided by the high-precision leveling machine, without using the feeder 3.

[0068] In one embodiment, the spot welding device 8 is a double-head spot welding machine, that is, a high-precision output, energy-saving double-head spot welding machine can be used to perform spot welding operations on the plate 14.

[0069] In one embodiment, the chipping machine 11 includes an automated manipulator, an anti-fall mechanism, and an automatic chipping machine driven by a servo motor. At this time, the automated manipulator can be used to automatically chip the plates 14, and after the plates 14 are formed into a plate bundle 15, they can be transported to the second welding device 12 through the feeder 3.

[0070] In one embodiment, the second welding device 12 includes a plasma fully automatic welding machine and a fully automatic laser welding machine, wherein the plasma fully automatic welding machine is used to weld the straight weld 17 at the end of the plate bundle 15, and the fully automatic laser welding machine is used to weld the herringbone weld 16 at the end of the plate bundle 15. There are straight welds 17 between the plate tubes 13 and the plate tubes 13, and there are herringbone welds 16 between the plate tubes 13 and the comb plate 18.

[0071] It should be noted that the welding of the ends of the plate bundle 15 is a manufacturing difficulty of the entire welded plate heat exchanger. The plate tubes 13 are automatically assembled and transported to the welding area after pre-assembly. First, the straight weld 17 at the end of the plate bundle 15 is welded by a plasma automatic welding machine, and the welding speed can reach 18m / min. Secondly, the herringbone weld 16 at the end of the plate bundle 15 is welded by a fully automatic laser welding machine, and the welding speed can reach 6m / min. Fully automated welding can ensure continuous welding, improve welding efficiency, and reduce the risk of leakage of the plate tubes 13 caused by human factors.

[0072] In addition, it should be noted that the present application provides a fully automatic production line for welded plate heat exchangers, which is used to automatically produce a welded plate heat exchanger with high heat exchange efficiency, compact structure, excellent antifreeze performance and energy saving. The fully automatic production line adopts efficient plate pressure forming and welding manufacturing technology, with the help of advanced stamping, welding equipment and intelligent systems, to improve working conditions, increase labor productivity, improve product quality, save production floor space, reduce production costs, ensure production balance, and has significant economic benefits.

[0073] It should be noted that the first welding device 9 and the second welding device 12 mentioned in the present invention, wherein the first and the second are only used to distinguish the difference in positions, that is, the first welding device 9 and the second welding device 12 are different welding devices used for welds at different positions.

[0074] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other. Any combination of all embodiments provided by the utility model is within the protection scope of this utility model and will not be described in detail here.

[0075] The above is a detailed introduction to the fully automatic production line of the welded plate heat exchanger provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A fully automatic production line for welding plate heat exchangers, characterized in that: Includes the following distributed in order: An uncoiler (1) for uncoiling a steel strip coil; A steel strip leveling machine (2), whose feed port is connected to the discharge port of the uncoiler (1) and is used for leveling the steel strip unwound from the steel strip coil; A forming device (4) for forming the steel strip into a sheet (14); A punching machine (5) for cutting the plate (14) into fixed lengths; A single-sheet leveling machine (6) for leveling the sheet (14); A sheet-assembling machine (7) for assembling two sheets (14); A spot welding device (8) for spot welding the long sides of two plates (14); A first welding device (9) for seam welding the long sides of two plates (14) to form a plate tube (13); A flaw detection device (10) for performing weld inspection on the plate tube (13); A stacking machine (11) for automatically stacking the plate tubes (13) to form a plate bundle (15); A second welding device (12) for welding the plate bundle (15); It also includes a feeder (3) for allowing the steel strip to pass through the steel strip leveling machine (2) and the forming device (4) in sequence, allowing the plate (14) to pass through the punching machine (5), the single-piece leveling machine (6), the sheet assembly machine (7), the spot welding equipment (8), the first welding equipment (9), the flaw detection equipment (10) and the chip machine (11) in sequence, and allowing the plate bundle (15) to pass through the second welding equipment (12).

2. The fully automatic production line for welded plate heat exchangers according to claim 1 is characterized in that: The forming device (4) is a high-speed punch press.

3. The fully automatic production line for welded plate heat exchangers according to claim 1 is characterized in that: The first welding device (9) is a long-side double-head welding machine using resistance rolling welding.

4. The fully automatic production line for welded plate heat exchangers according to claim 1 is characterized in that: The steel strip leveling machine (2) is a high-precision leveling machine with a guiding device.

5. The fully automatic production line for welded plate heat exchangers according to claim 1 is characterized in that: The feeder (3) is a plate leveling machine driven by a servo motor.

6. The fully automatic production line for welded plate heat exchangers according to any one of claims 1 to 5, characterized in that: The single-chip leveling machine (6) is a high-precision leveling machine provided with a conveying platform.

7. The fully automatic production line for welded plate heat exchangers according to any one of claims 1 to 5, characterized in that: The spot welding equipment (8) is a double-head spot welding machine.

8. The fully automatic production line for welded plate heat exchangers according to any one of claims 1 to 5, characterized in that: The flaw detection equipment (10) is an online automatic eddy current flaw detector.

9. The fully automatic production line for welded plate heat exchangers according to any one of claims 1 to 5, characterized in that: The chip machine (11) comprises an automated manipulator, an anti-fall mechanism and an automatic chip machine driven by a servo motor.

10. The fully automatic production line for welded plate heat exchangers according to any one of claims 1 to 5, characterized in that: The second welding equipment (12) comprises a plasma fully automatic welding machine and a fully automatic laser welding machine, wherein the plasma fully automatic welding machine is used for welding the straight weld (17) at the end of the plate bundle (15), and the fully automatic laser welding machine is used for welding the herringbone weld (16) at the end of the plate bundle (15).

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