CN213944665U - Edge folding equipment for finned tube - Google Patents
Edge folding equipment for finned tube Download PDFInfo
- Publication number
- CN213944665U CN213944665U CN202022688945.0U CN202022688945U CN213944665U CN 213944665 U CN213944665 U CN 213944665U CN 202022688945 U CN202022688945 U CN 202022688945U CN 213944665 U CN213944665 U CN 213944665U
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- Prior art keywords
- mounting plate
- finned tube
- edge folding
- frame
- mounting
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- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 8
- 125000003003 spiro group Chemical group 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003546 flue gas Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a finned tube hem equipment, including frame, hem mechanism, moving mechanism and fixture, horizontal fixed mounting has the platen in the frame, fixture sets up on the fixture mounting panel, moving mechanism includes first guide rail slider mechanism, U type frame and U type frame mounting panel, first guide rail slider mechanism along X axle direction fixed mounting be in on the platen, hem mechanism includes hem mechanism and lower hem mechanism. The utility model discloses a set up frame, hem mechanism, moving mechanism and fixture, solved the problem of finned tube hem processing in the heat exchanger manufacturing process, through hem processing, reduce the interval between the fluorescent lamp of finned tube, flue gas stream and finned tube fluorescent lamp can carry out more fully the contact and erode, and the reinforcing heat transfer improves turbulent intensity, increase convection heat transfer coefficient to can reach the purpose that the reinforcing conducts heat effectively, and enable the heat exchanger volume and advance one and reduce.
Description
Technical Field
The utility model relates to an automatic hem equipment technical field specifically is a finned tube hem equipment.
Background
The finned tube is a heat exchange element, in order to improve the heat exchange efficiency, the surface of the heat exchange tube is usually finned to increase the external surface area (or the internal surface area) of the heat exchange tube, thereby achieving the purpose of improving the heat exchange efficiency, the finned tube is used as the heat exchange element of the heat exchanger, the heat exchange of the smoke side is enhanced, the volume of the whole heat exchanger can be reduced, but the height of the finned tube fin is influenced by welding processing, the finned tube is difficult to process into a small size, the volume of the heat exchanger cannot be further reduced, the space between light tubes of the finned tube is reduced by adopting the flanging processing of the finned tube, the smoke flow and the light tubes of the finned tube are more fully contacted and washed, the heat exchange is enhanced, the turbulence pulsation degree is improved, the convection heat exchange coefficient is increased, the purpose of enhancing the heat transfer can be effectively achieved, and the volume of the heat exchanger can be further reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the utility model provides a finned tube flanging device, which solves the problems in the prior art.
The utility model discloses a: a finned tube flanging device comprises a frame, a flanging mechanism, a moving mechanism and a clamping mechanism, wherein a bedplate is horizontally and fixedly arranged on the frame, the moving mechanism is arranged on the bedplate, a clamping mechanism mounting plate is horizontally arranged above the bedplate, the clamping mechanism is arranged on the clamping mechanism mounting plate, the moving mechanism comprises a first guide rail slider mechanism, a U-shaped frame and a U-shaped frame mounting plate, the first guide rail slider mechanism is fixedly arranged on the bedplate along the x-axis direction, the U-shaped frame mounting plate is fixedly arranged on two sliders of the first guide rail slider mechanism, the U-shaped frame is fixedly connected on the U-shaped frame mounting plate, the flanging mechanism comprises an upper flanging mechanism and a lower flanging mechanism, the upper flanging mechanism is arranged in the middle of the upper end of the U-shaped frame, the lower flanging mechanism is arranged on the U-shaped frame mounting plate, and the central lines of the lower flanging mechanism and the upper flanging mechanism are coincided along the Z-axis direction, and the lower edge folding mechanism and the upper edge folding mechanism are both provided with two guide rollers and one forming roller, and the forming roller is positioned between the two guide rollers.
Preferably, a screw rod parallel to the first guide rail slider mechanism is arranged on the platen, bearing blocks are rotatably mounted at two ends of the screw rod, the two bearing blocks are fixedly mounted on the platen, a screw rod nut is screwed on the screw rod and fixedly connected to the U-shaped frame mounting plate, and a first servo motor is fixedly connected to one end of the screw rod.
Preferably, hem mechanism includes hem mechanism, guide roller, shaping gyro wheel, goes up the gyro wheel mounting bracket, gyro wheel mounting bracket down, goes up adjusting screw and adjusting screw down, go up gyro wheel mounting bracket, down each rotatable formula install two guide roller and a shaping gyro wheel on the gyro wheel mounting bracket, the gyro wheel mounting bracket down, and guide roller, shaping gyro wheel's axis is along Y axle direction, the last adjusting screw of upper end fixedly connected with along Z axle direction of going up the gyro wheel mounting bracket, the lower adjusting screw of tip fixedly connected with along Z axle direction of gyro wheel mounting bracket down, it connects on U type frame to go up the adjusting screw spiro union, adjusting screw spiro union is on U type frame mounting panel down.
Preferably, the middle part of the clamping mechanism mounting plate is provided with a avoiding through hole, and the lower edge folding mechanism is arranged in the avoiding through hole.
Preferably, the clamping mechanism is arranged to be of a symmetrical structure along the finned tube and comprises two symmetrically arranged second servo motors, a transmission screw, a finned tube clamping block, a clamping block mounting plate, a nut cushion block, a second guide rail sliding block mechanism and a fixing plate, the fixing plate is vertically and fixedly mounted on the clamping mechanism mounting plate, the second servo motors are also fixedly mounted on the clamping mechanism mounting plate, a power output shaft of each second servo motor penetrates through the clamping mechanism mounting plate, the transmission screw is coaxially and fixedly connected onto the power output shaft of each second servo motor, a nut block is screwed at the end part of the transmission screw, the nut blocks are fixedly mounted on the nut cushion block and the clamping block mounting plate, the nut cushion block is fixedly connected with the clamping block mounting plate in parallel, and the second guide rail sliding block mechanism is fixedly mounted on the clamping mechanism mounting plate along the Y-axis direction, the lower end part of the clamping block mounting plate is fixedly connected to a sliding block of the second guide rail sliding block mechanism, and the finned tube clamping block is fixedly mounted on the clamping block mounting plate along an X axis.
Preferably, the fixture mounting panel is still fixed mounting along the both ends of X axle direction has a finned tube mounting bracket, two respectively be provided with a finned tube installation pole along the X axle direction on the finned tube mounting bracket, and the one end of one of them finned tube installation pole is provided with the screw thread, the spiro union is on the finned tube mounting bracket.
Preferably, the forming roller is provided with a plurality of shapes, preferably a straight edge folding forming roller, an oblique edge folding forming roller and a four-edge folding forming roller.
The utility model has the advantages as follows: the utility model discloses a set up frame, hem mechanism, moving mechanism and fixture, solved the problem of finned tube hem processing in the heat exchanger manufacturing process, through hem processing, reduce the interval between the fluorescent lamp of finned tube, flue gas stream and finned tube fluorescent lamp can carry out more fully the contact and erode, and the reinforcing heat transfer improves turbulent intensity, increase convection heat transfer coefficient to can reach the purpose that the reinforcing conducts heat effectively, and enable the heat exchanger volume and advance one and reduce.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a three-dimensional schematic diagram of the overall structure of the present invention;
fig. 2 is a three-dimensional schematic diagram of the main structure of the present invention;
fig. 3 is a three-dimensional schematic view of the clamping mechanism of the present invention;
FIG. 4 is a schematic view of the working principle of the present invention;
fig. 5 is a schematic view of the folding-straight edge forming roller of the present invention;
FIG. 6 is a schematic view of the bevel edge folding forming roller of the present invention;
fig. 7 is a schematic view of the four-side forming roller of the present invention.
Reference numerals of the above figures: the device comprises a frame 10, a bedplate 11, a clamping mechanism mounting plate 12, avoiding through holes 13, a finned tube mounting frame 14, a finned tube mounting rod 15, a flanging mechanism 20, an upper flanging mechanism 21, a lower flanging mechanism 22, a guide roller 23, a forming roller 24, an upper roller mounting frame 25, a lower roller mounting frame 26, an upper adjusting screw 27, a lower adjusting screw 28, a moving mechanism 30, a first guide rail slider mechanism 31, a U-shaped frame 32, a U-shaped frame mounting plate 33, a lead screw 34, a bearing seat 35, a lead screw nut 36, a first servo motor 37, a clamping mechanism 40, a second servo motor 41, a transmission screw 42, a finned tube clamping block 43, a clamping block mounting plate 44, a nut cushion block 45, a second guide rail slider mechanism 46, a fixing plate 47, a nut block 48, a finned tube 50, a straight edge folding forming roller 241, a bevel edge folding forming roller 242 and a four-edge folding forming roller 243.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, a fin tube flanging device comprises a frame 10, a flanging mechanism 20, a moving mechanism 30 and a clamping mechanism 40, wherein a platen 11 is horizontally and fixedly mounted on the frame 10, the moving mechanism 30 is arranged on the platen 11, a clamping mechanism mounting plate 12 is horizontally arranged above the platen 11, the clamping mechanism 40 is arranged on the clamping mechanism mounting plate 12, the moving mechanism 30 comprises a first guide rail slider mechanism 31, a U-shaped frame 32 and a U-shaped frame mounting plate 33, the first guide rail slider mechanism 31 is fixedly mounted on the platen 11 along an x-axis direction, the U-shaped frame mounting plate 33 is fixedly mounted on two sliders of the first guide rail slider mechanism 31, the U-shaped frame 32 is fixedly connected to the U-shaped frame mounting plate 33, and the U-shaped frame 32 and the U-shaped frame mounting plate 33 move along a guide rail of the first guide rail slider mechanism 31, the flanging mechanism 20 comprises an upper flanging mechanism 21 and a lower flanging mechanism 22, the upper flanging mechanism 21 is arranged in the middle of the upper end of the U-shaped frame 32, the lower flanging mechanism 22 is arranged on the U-shaped frame mounting plate 33, the lower flanging mechanism 22 and the upper flanging mechanism 21 coincide along the central line of the Z-axis direction, two guide rollers 23 and one forming roller 24 are arranged on the lower flanging mechanism 22 and the upper flanging mechanism 21 respectively, the forming roller 24 is positioned between the two guide rollers 23, the finned tube 50 is arranged between the guide rollers 23 and the forming rollers 24 on the lower flanging mechanism 22 and the upper flanging mechanism 21, the moving mechanism 30 drives the flanging mechanism 20 to move along the X-axis direction, and the forming rollers 24 are used for flanging the finned tube 50.
Further, a screw rod 34 parallel to the first guide rail slider mechanism 31 is arranged on the platen 11, bearing seats 35 are rotatably mounted at both ends of the screw rod 34, the two bearing seats 35 are fixedly mounted on the platen 11, a screw nut 36 is screwed on the screw rod 34, the screw nut 36 is fixedly connected to the U-shaped frame mounting plate 33, a first servo motor 37 is fixedly connected to one end of the screw rod 34, the first servo motor 37 drives the screw rod 34 to rotate, and the U-shaped frame mounting plate 33, the U-shaped frame 32 and the edge folding mechanism 20 are driven to move along the guide rail of the first guide rail slider mechanism 31 through transmission of the screw nut 36.
Further, the folding mechanism 20 includes an upper folding mechanism 21, a lower folding mechanism 22, guide rollers 23, a forming roller 24, an upper roller mounting frame 25, a lower roller mounting frame 26, an upper adjusting screw 27 and a lower adjusting screw 28, two guide rollers 23 and one forming roller 24 are mounted on the upper roller mounting frame 25 and the lower roller mounting frame 26 in a rotatable manner, the axes of the guide rollers 23 and the forming roller 24 are along the Y-axis direction, the upper end of the upper roller mounting frame 25 is fixedly connected with the upper adjusting screw 27 along the Z-axis direction, the lower end of the lower roller mounting frame 26 is fixedly connected with the lower adjusting screw 28 along the Z-axis direction, the upper adjusting screw 27 is screwed on the U-shaped frame 32, the lower adjusting screw 28 is screwed on the U-shaped frame mounting plate 33, the upper adjusting screw 27 and the lower adjusting screw 28 are adjusted, the adjusting roller mounting frame 25, The distance between the rollers of the lower roller mounting rack 26 is suitable for the flanging processing of the finned tubes with different diameters.
Furthermore, a avoiding through hole 13 is arranged in the middle of the clamping mechanism mounting plate 12, and the lower edge folding mechanism 22 is arranged in the avoiding through hole 13.
Further, the clamping mechanism 40 is arranged to be of a structure symmetrical along the finned tube, and comprises two second servo motors 41, a transmission screw 42, a finned tube clamping block 43, a clamping block mounting plate 44, a nut cushion block 45, a second guide rail slider mechanism 46 and a fixing plate 47 which are symmetrically arranged, the fixing plate 47 is vertically and fixedly mounted on the clamping mechanism mounting plate 12, the second servo motors 41 are also fixedly mounted on the clamping mechanism mounting plate 12, a power output shaft of each second servo motor 41 penetrates through the clamping mechanism mounting plate 12, the transmission screw 42 is coaxially and fixedly connected to the power output shaft of each second servo motor 41, a nut block 48 is screwed on the end portion of each transmission screw 42, the nut blocks 48 are fixedly mounted on the nut cushion block 45 and the clamping block mounting plate 44, and the nut cushion block 45 is fixedly connected with the clamping block mounting plate 44 in parallel, the second guide rail slider mechanism 46 is fixedly arranged on the clamping mechanism mounting plate 12 along the Y-axis direction, the lower end part of the clamping block mounting plate 44 is fixedly connected to a slider of the second guide rail slider mechanism 46, the finned tube clamping block 43 is fixedly arranged on the clamping block mounting plate 44 along the X-axis direction, the second servo motor 41 drives the transmission screw 42 to rotate, and the nut block 45 and the clamping block mounting plate 44 are pushed to move along a guide rail of the second guide rail slider mechanism 46 through transmission of the nut block 48, so that the clamping mechanism is suitable for clamping the finned tubes 50 with different diameters.
Further, fixture mounting panel 12 still fixed mounting has finned tube mounting bracket 14, two along the both ends of X axle direction respectively be provided with a finned tube installation pole 15 along the X axle direction on the finned tube mounting bracket 14, and one of them finned tube installation pole 15's one end is provided with the screw thread, and the spiro union is installed on finned tube mounting bracket 14 with finned tube 50 both ends on finned tube installation pole 15, rotates screwed finned tube installation pole 15 locking finned tube 50.
Further, the forming roller 24 is provided with a plurality of shapes, preferably a straight edge folding forming roller 241, an oblique edge folding forming roller 242 and a four edge folding forming roller 243, referring to fig. 5, the outer contour surface of the straight edge folding forming roller 241 is set to be a cylindrical surface, and the fins of the contact surface of the finned tube 50 are processed and folded into two parallel planes; referring to fig. 6, the outer contour surface of the bevel edge folding forming roller 242 is set as a circular table surface, and the fins of the contact surface of the finned tube 50 are processed and folded into an inclined plane forming an included angle with the horizontal plane; referring to fig. 7, the outer contour surface of the four-side folding forming roller 243 is a groove surface, and the fins on the contact surface of the finned tube 50 are processed and folded into four planes symmetrical along the horizontal plane where the axis is located.
The working principle is as follows: mounting the corresponding shaping roller 24 to the upper and lower roller mounts 25, 26 according to the desired finned tube edgefold shape, and moving the clevis 32 to the end of the guide roller 23 and shaping roller 24 adjacent the unthreaded finned tube mounting stem 15; mounting two ends of the finned tube 50 on the finned tube mounting rods 15, and rotating the threaded finned tube mounting rods 15 to lock the finned tube 50; the second servo motor 41 is started to drive the transmission screw 42 to rotate, and the nut blocks 48 are used for driving the two symmetrical nut cushion blocks 45 and the clamping block mounting plates 44 to move oppositely along the guide rails of the second guide rail sliding block mechanism 46 and clamp the finned tubes 50; adjusting the upper adjusting screw 27 and the lower adjusting screw 28, and adjusting the distance between the rollers of the roller mounting rack 25 and the lower roller mounting rack 26 to the required fin bending degree; the first servo motor 37 drives the screw rod 34 to rotate, the U-shaped frame mounting plate 33, the U-shaped frame 32 and the edge folding mechanism 20 are driven to move along the guide rail of the first guide rail slider mechanism 31 through the transmission of the screw rod nut 36, the guide roller 23 guides the finned tube 50, and the forming roller 24 bends the finned tube 50 for processing.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (7)
1. The utility model provides a finned tube hem equipment, includes frame, hem mechanism, moving mechanism and fixture, its characterized in that: the frame is horizontally and fixedly provided with a bedplate, the moving mechanism is arranged on the bedplate, a clamping mechanism mounting plate is horizontally arranged above the bedplate, the clamping mechanism is arranged on the clamping mechanism mounting plate, the moving mechanism comprises a first guide rail slide block mechanism, a U-shaped frame and a U-shaped frame mounting plate, the first guide rail slide block mechanism is fixedly arranged on the bedplate along the x-axis direction, the U-shaped frame mounting plate is fixedly arranged on two slide blocks of the first guide rail slide block mechanism, the U-shaped frame is fixedly connected on the U-shaped frame mounting plate, the edge folding mechanism comprises an upper edge folding mechanism and a lower edge folding mechanism, the upper edge folding mechanism is arranged in the middle of the upper end of the U-shaped frame, the lower edge folding mechanism is arranged on the U-shaped frame mounting plate, the central lines of the lower edge folding mechanism and the upper edge folding mechanism along the Z-axis direction coincide, and the lower edge folding mechanism and the upper edge folding mechanism are both provided with, and the forming roller is positioned between the two guide rollers.
2. A fin tube flanging device as claimed in claim 1, wherein: the table plate is provided with a lead screw parallel to the first guide rail sliding block mechanism, bearing blocks are rotatably mounted at two ends of the lead screw, the two bearing blocks are fixedly mounted on the table plate, a lead screw nut is screwed on the lead screw and fixedly connected to a U-shaped frame mounting plate, and a first servo motor is fixedly connected to one end of the lead screw.
3. A fin tube flanging device as claimed in claim 1, wherein: the edge folding mechanism comprises an upper edge folding mechanism, a lower edge folding mechanism, guide rollers, forming rollers, an upper roller mounting frame, a lower roller mounting frame, an upper adjusting screw and a lower adjusting screw, wherein the upper roller mounting frame and the lower roller mounting frame are respectively rotatably mounted with two guide rollers and one forming roller, the axes of the guide rollers and the forming rollers are along the Y-axis direction, the upper end part of the upper roller mounting frame is fixedly connected with the upper adjusting screw along the Z-axis direction, the lower end part of the lower roller mounting frame is fixedly connected with the lower adjusting screw along the Z-axis direction, the upper adjusting screw is screwed on the U-shaped frame, and the lower adjusting screw is screwed on the U-shaped frame mounting plate.
4. A fin tube flanging device as claimed in claim 1, wherein: a avoiding through hole is formed in the middle of the clamping mechanism mounting plate, and the lower edge folding mechanism is arranged in the avoiding through hole.
5. A fin tube flanging device as claimed in claim 1, wherein: the clamping mechanism is arranged to be of a symmetrical structure along the finned tube and comprises two symmetrically arranged second servo motors, a transmission screw rod, a finned tube clamping block, a clamping block mounting plate, a nut cushion block, a second guide rail slider mechanism and a fixing plate, wherein the fixing plate is vertically and fixedly mounted on the clamping mechanism mounting plate, the second servo motors are also fixedly mounted on the clamping mechanism mounting plate, a power output shaft of each second servo motor penetrates through the clamping mechanism mounting plate, the transmission screw rod is coaxially and fixedly connected onto the power output shaft of each second servo motor, a nut block is screwed at the end part of the transmission screw rod, the nut block is fixedly mounted on the nut cushion block and the clamping block mounting plate, the nut cushion block is fixedly connected with the clamping block mounting plate in parallel, and the second guide rail slider mechanism is fixedly mounted on the clamping mechanism mounting plate along the Y-axis direction, the lower end part of the clamping block mounting plate is fixedly connected to a sliding block of the second guide rail sliding block mechanism, and the finned tube clamping block is fixedly mounted on the clamping block mounting plate along an X axis.
6. A fin tube flanging device as claimed in claim 1, wherein: the fixture mounting panel is still fixed mounting along the both ends of X axle direction has a finned tube mounting bracket, two respectively be provided with a finned tube installation pole along the X axle direction on the finned tube mounting bracket, and the one end of one of them finned tube installation pole is provided with the screw thread, and the spiro union is on the finned tube mounting bracket.
7. A fin tube flanging device as claimed in claim 1, wherein: the forming roller is provided with a plurality of shapes, including a straight edge forming roller, an oblique edge forming roller and a four-edge forming roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688945.0U CN213944665U (en) | 2020-11-19 | 2020-11-19 | Edge folding equipment for finned tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022688945.0U CN213944665U (en) | 2020-11-19 | 2020-11-19 | Edge folding equipment for finned tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213944665U true CN213944665U (en) | 2021-08-13 |
Family
ID=77209841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022688945.0U Expired - Fee Related CN213944665U (en) | 2020-11-19 | 2020-11-19 | Edge folding equipment for finned tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213944665U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112439847A (en) * | 2020-11-19 | 2021-03-05 | 苏州哈瑞斯能源环保科技有限公司 | Edge folding device and edge folding method for finned tube |
-
2020
- 2020-11-19 CN CN202022688945.0U patent/CN213944665U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112439847A (en) * | 2020-11-19 | 2021-03-05 | 苏州哈瑞斯能源环保科技有限公司 | Edge folding device and edge folding method for finned tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210813 |