Novel U-shaped pipe bending device

Abstract

The utility model belongs to the technical field of pipe bending devices, and particularly relates to a novel U-shaped pipe bending device. The utility model provides a novel U-shaped pipe bending device aiming at the defects that an existing bending mould cannot be reused and is complex to replace and the like. The pipe bending device comprises a pulling rod 9 and is characterized in that a pulling handle 11 is arranged at the rear end of the pulling rod 9, a fixing pin shaft 12 penetrates through the front end of the pulling rod 9 and the center of a fixing mould 6, the fixing mould 6 is connected with the inner end of a first connecting plate 2 and the middle of a second connecting plate 5 respectively, and the outer side of the first connecting plate 2 is connected with a pipe bending mould 1 through a first pipe bending mould fastener 3. The outer side of the second connecting plate 5 is connected with the pipe bending mould 1 through a second pipe bending mould fastener 14; and the turning tire 8 is arranged on the pulling rod 9.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe bending devices, and in particular relates to a novel U-shaped pipe bending device. Background Art

[0002] U-shaped tubes are a common tube bundle structure in heat exchangers. Bending the heat exchange tubes into a U shape can increase the heat transfer area of ​​the heat exchanger and can also effectively solve the damage to the shell caused by thermal expansion and contraction of the heat exchange tubes. Common U-shaped tube bending methods include rolling, roller method, bulging method and direct bending forming method, among which direct bending forming method is the most common and has the lowest equipment requirements. However, most manufacturers use a U-shaped heat exchange tube bending device jig for direct bending in the production process as an integral structure. A set of jigs are made according to each U-shaped tube specification, which has the disadvantages of wasting materials, difficult and time-consuming tire changes, and low reuse rate. Utility Model Content

[0003] The utility model provides a novel U-shaped pipe bending device to solve the problems that the existing bending jigs cannot be reused and the jigs are complicated to change.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme, which includes a lever 9, characterized in that a lever handle 11 is provided at the rear end of the lever 9, a fixed pin shaft 12 passes through the front end of the lever 9 and the center of the fixed jig 6, the fixed jig 6 is respectively connected to the inner end of the first connecting plate 2 and the middle part of the second connecting plate 5, the outer side of the first connecting plate 2 is connected to the bending jig 1 through the first bending jig fastener 3, and the outer side of the second connecting plate 5 is connected to the bending jig 1 through the second bending jig fastener 14; a rotating jig 8 is provided on the lever 9.

[0005] As a preferred solution, the first tube bending jig fastener 3 and the second tube bending jig fastener 14 of the utility model are bolts.

[0006] As another preferred scheme, the utility model provides a first strip opening 19 on the first connecting plate 2 along the length direction of the first connecting plate 2, and a second strip opening 20 on the second connecting plate 5 along the length direction of the second connecting plate 5; the first tube bending jig fastener 3 passes through the first strip opening 19 and is connected to the tube bending jig 1, and the second tube bending jig fastener 14 passes through the second strip opening 20 and is connected to the tube bending jig 1.

[0007] As another preferred solution, the utility model has two first connecting plates 2 and one second connecting plate 5, and the second connecting plate 5 is perpendicular to the lever 9; the two first connecting plates 2 are symmetrically arranged on both sides of the second connecting plate 5, and the first connecting plate 2 is inclined from the inside to the outside.

[0008] As another preferred solution, the fixing jig 6 of the present invention is welded to the inner end of the first connecting plate 2 and the middle of the second connecting plate 5 respectively.

[0009] As another preferred solution, the fixed pin shaft 12 of the utility model is fixedly arranged on the operating platform 13 .

[0010] As another preferred solution, the lower end of the fixed pin shaft 12 of the utility model is welded to the upper end of the operating platform 13.

[0011] As another preferred solution, the lever 9 of the utility model is provided with a third strip-shaped opening 15 along the length direction of the lever 9 , and the bolt assembly 16 passes through the third strip-shaped opening 15 and the center of the tire 8 .

[0012] As another preferred solution, the lever 9 of the utility model includes an upper plate 17 and a lower plate 18 , third strip openings 15 are provided at corresponding positions of the upper plate 17 and the lower plate 18 , and the tire 8 is provided between the upper plate 17 and the lower plate 18 .

[0013] As another preferred solution, a rib plate 10 is provided at the rear end of the pull rod 9 of the utility model.

[0014] Secondly, the outer end surfaces of the tube bending jig 1 and the turning jig 8 of the utility model are arc surfaces 4 corresponding to the contour of the heat exchange tube 7 .

[0015] In addition, the fixing jig 6 and the bending jig 1 of the utility model are arranged between the upper plate 17 and the lower plate 18 , and the first connecting plate 2 and the second connecting plate 5 are arranged between the fixing jig 6 and the upper plate 17 .

[0016] The utility model has beneficial effects.

[0017] The first connecting plate 2, the second connecting plate 5, the first bending jig fastener 3, and the second bending jig fastener 14 of the utility model facilitate the connection and replacement of the bending jig 1. The middle part of the second connecting plate 5 supports and fixes the pull rod 9. The rotating jig 8 cooperates with the bending jig 1 to complete the bending operation.

[0018] The utility model aims at the shortcomings that the existing bending jigs cannot be reused and the jig replacement is complicated, and provides a novel and reusable U-shaped pipe bending device (only the bending jig 1 needs to be replaced).

[0019] The pipe bending device of the utility model has the following advantages: saving materials, convenient replacement of molds, reusability, simple structure, few replacement parts and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the utility model is not limited to the following descriptions.

[0021] Figure 1 It is a schematic diagram of the structure of the utility model.

[0022] Figure 2 It is a side view of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the second connecting plate of the utility model.

[0024] Figure 4 It is a structural schematic diagram of the first connecting plate of the utility model.

[0025] Figure 5 It is a schematic diagram of the structure of the fixed tire of the utility model. DETAILED DESCRIPTION

[0026] As shown in the figure, the utility model includes a lever 9, a handle 11 is provided at the rear end of the lever 9, a fixed pin 12 passes through the front end of the lever 9 and the center of the fixed jig 6, the fixed jig 6 is respectively connected to the inner end of the first connecting plate 2 and the middle of the second connecting plate 5, the outer side of the first connecting plate 2 is connected to the bending jig 1 through the first bending jig fastener 3, and the outer side of the second connecting plate 5 is connected to the bending jig 1 through the second bending jig fastener 14; a rotating jig 8 is provided on the lever 9.

[0027] The first tube bending jig fastener 3 and the second tube bending jig fastener 14 are bolts. The tube bending jig 1 is provided with threaded holes corresponding to the bolts.

[0028] A first strip opening 19 is provided on the first connecting plate 2 along the length direction of the first connecting plate 2, and a second strip opening 20 is provided on the second connecting plate 5 along the length direction of the second connecting plate 5; the first bending tube jig fastener 3 passes through the first strip opening 19 and is connected to the bending tube jig 1, and the second bending tube jig fastener 14 passes through the second strip opening 20 and is connected to the bending tube jig 1.

[0029] The first strip opening 19 and the second strip opening 20 are slide grooves for fixing bolts, which play a role in fixing the pipe bending jig 1 of different sizes on the connecting plate. The pipe bending jig 1 can be easily replaced to adapt to the U-shaped pipe bending work of different specifications and sizes.

[0030] There are two first connecting plates 2 and one second connecting plate 5, and the second connecting plate 5 is perpendicular to the lever 9; the two first connecting plates 2 are symmetrically arranged on both sides of the second connecting plate 5, and the first connecting plate 2 is inclined from the inside to the outside. The first connecting plate 2 is inclined from the inside to the outside, and after being connected to the bending mold 1, the bending of the pipe can exceed 180 degrees, and the requirement of 180 degrees can still be guaranteed after the metal pipe rebounds slightly.

[0031] The fixing jig 6 is welded to the inner end of the first connecting plate 2 and the middle of the second connecting plate 5 respectively.

[0032] The fixing pin shaft 12 is fixedly arranged on the operating platform 13 .

[0033] The lower end of the fixed pin shaft 12 is welded to the upper end of the operating platform 13. The fixed jig 6 and the fixed pin shaft 12 can be interference fit.

[0034] The lever 9 is provided with a third strip-shaped opening 15 along the length direction of the lever 9 , and the bolt assembly 16 passes through the third strip-shaped opening 15 and the center of the tire 8 .

[0035] The third strip-shaped opening 15 allows the tire 8 to move laterally, and the tire 8 is fixed by a bolt assembly 16 .

[0036] The lever 9 includes an upper plate 17 and a lower plate 18 . The upper plate 17 and the lower plate 18 are provided with third strip openings 15 at corresponding positions. The tire 8 is provided between the upper plate 17 and the lower plate 18 .

[0037] A rib plate 10 is provided at the rear end of the pull rod 9 to improve the strength of the device.

[0038] The outer end surfaces of the tube bending jig 1 and the turning jig 8 are arc surfaces 4 corresponding to the contour of the heat exchange tube 7 .

[0039] The fixing jig 6 and the bending jig 1 are arranged between the upper plate 17 and the lower plate 18 , and the first connecting plate 2 and the second connecting plate 5 are arranged between the fixing jig 6 and the upper plate 17 .

[0040] The U-shaped pipe bending device of the utility model is mainly used in the production of U-shaped pipes, and can also be used in other places according to actual conditions.

[0041] The working process of the utility model is described below in conjunction with the accompanying drawings.

[0042] Select the corresponding bending jig 1 according to the actual U-shaped tube size, and fix the bending jig 1 on the bending device through the first connecting plate 2, the second connecting plate 5, the first bending jig fastener 3, and the second bending jig fastener 14. Move the rotating tire 8 to the appropriate position and fix it through the bolt assembly 16. Insert the heat exchange tube 7 from between the bending jig 1 and the rotating tire 8, and after adjusting the position, use the clamp (the clamp is fixed on the operating platform 13, and the clamp clamp and the heat exchange tube 7 are protected with a rubber pad to prevent scratches on the heat exchange tube) to fix the heat exchange tube 7 to ensure the level of the heat exchange tube 7 and the stability of the heat exchange tube 7 during bending. The operator pushes the trigger 11 horizontally at a uniform speed counterclockwise until it rotates more than 180° and then stops, and the bending is completed. Pull out the heat exchange tube 7 and check the U-shaped tube forming condition, that is, a group of U-shaped tube heat exchange tube 7 bending is completed. When bending the next group of heat exchange tubes of the same type, it is only necessary to loosen the first bending jig fasteners 3 and the second bending jig fasteners 14, pull out the replacement bending jig 1, adjust the rotating jig 8 (adjust the position of the rotating jig 8 through the third strip opening 15 on the lever 9, and after adjustment, fix it with the bolt assembly 16) to bend the next group of heat exchange tubes 7.

[0043] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. A novel U-shaped tube bending device, comprising a lever (9), characterized in that A trigger handle (11) is provided at the rear end of the lever (9); a fixing pin (12) passes through the front end of the lever (9) and the center of a fixing jig (6); the fixing jig (6) is respectively connected to the inner end of the first connecting plate (2) and the middle of the second connecting plate (5); the outer side of the first connecting plate (2) is connected to the bending jig (1) via a first bending jig fastener (3); and the outer side of the second connecting plate (5) is connected to the bending jig (1) via a second bending jig fastener (14); and a rotating jig (8) is provided on the lever (9).

2. According to claim 1, a novel U-shaped pipe bending device is characterized in that The first tube bending jig fastener (3) and the second tube bending jig fastener (14) are bolts.

3. According to claim 1, a novel U-shaped pipe bending device is characterized in that A first strip-shaped opening (19) is provided on the first connecting plate (2) along the length direction of the first connecting plate (2), and a second strip-shaped opening (20) is provided on the second connecting plate (5) along the length direction of the second connecting plate (5); the first bending tube jig fastener (3) passes through the first strip-shaped opening (19) to be connected to the bending tube jig (1), and the second bending tube jig fastener (14) passes through the second strip-shaped opening (20) to be connected to the bending tube jig (1).

4. A novel U-shaped pipe bending device according to claim 1, characterized in that There are two first connecting plates (2) and one second connecting plate (5), and the second connecting plate (5) is perpendicular to the lever (9); the two first connecting plates (2) are symmetrically arranged on both sides of the second connecting plate (5), and the first connecting plate (2) is inclined from the inner bottom to the outer top.

5. According to claim 1, a novel U-shaped pipe bending device is characterized in that The fixed pin shaft (12) is fixedly arranged on the operating platform (13).

6. A novel U-shaped pipe bending device according to claim 1, characterized in that The lower end of the fixed pin shaft (12) is welded to the upper end of the operating platform (13); and the fixed jig (6) is respectively welded to the inner end of the first connecting plate (2) and the middle of the second connecting plate (5).

7. A novel U-shaped pipe bending device according to claim 1, characterized in that The lever (9) is provided with a third strip-shaped opening (15) along the length direction of the lever (9), and the bolt assembly (16) passes through the third strip-shaped opening (15) and the center of the tire (8).

8. A novel U-shaped pipe bending device according to claim 1, characterized in that The lever (9) comprises an upper plate (17) and a lower plate (18); a third strip opening (15) is arranged at corresponding positions of the upper plate (17) and the lower plate (18); the rotating tire (8) is arranged between the upper plate (17) and the lower plate (18); the fixing mold (6) and the bending tube mold (1) are arranged between the upper plate (17) and the lower plate (18); and the first connecting plate (2) and the second connecting plate (5) are arranged between the fixing mold (6) and the upper plate (17).

9. A novel U-shaped pipe bending device according to claim 1, characterized in that A rib plate (10) is provided at the rear end of the pull rod (9).

10. A novel U-shaped pipe bending device according to claim 1, characterized in that The outer end surfaces of the tube bending jig (1) and the rotating jig (8) are arc surfaces (4) corresponding to the contour of the heat exchange tube (7).

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