A metal pipe processing device for highway bridge construction

Abstract

The present invention belongs to the technical field of metal pipe bending, and specifically discloses a metal pipe processing device for highway bridge construction, including an internal bending support mechanism, a self-positioning bending mechanism, a clamping and positioning mechanism, and a frame. The internal bending support mechanism is arranged on the frame, the self-positioning bending mechanism is arranged on the frame, and the clamping and positioning mechanism is arranged on the frame. By means of hydraulic support, the present invention can not only provide sufficient support during bending but also smoothly take it out after reducing the pressure. At the same time, since the hydraulic system does not directly contact the pipe fittings, there is no need to block them by means such as end welding, nor is it necessary to add a cleaning step after bending.

Description

Technical Field

[0001] The invention belongs to the technical field of metal pipe bending, and specifically refers to a metal pipe processing device for highway bridge construction. Background Art

[0002] During the construction of highway bridges, etc., metal pipes are a very common component material and are widely used in guardrails, handrails, equipment mounting brackets and other aspects. Bending metal pipes is a very common process in metal pipe processing. However, due to the hollow structure of the pipe, it is inevitable that the bend will collapse and become deflated during bending. This not only affects the appearance, but also leads to a decrease in the strength of the bend. Therefore, for the bending of pipe fittings, internal support is generally used to reduce the extent of the collapse.

[0003] When a plastic tube is bent, a metal spring is often filled inside. This is because the strength of metal is much greater than that of plastic. However, when bending a metal tube, it is difficult to find a material that is much stronger than a metal tube. Even if such a material is available, it does not have enough elasticity to allow it to be smoothly removed from the bent tube after bending.

[0004] In actual operation, the sand filling method is sometimes used; this internal support method is very clever, but it is relatively complicated to implement. Since bulk sand does not have a separate wrapping, how to perform high-strength sealing on both ends of the pipe is a relatively complicated problem. The existing technology mostly uses end welding; and after the sand is taken out, a cleaning step is required for the pipe. Relatively speaking, the entire process of auxiliary bending and avoiding collapse is relatively complicated, and the efficiency is low in mass production. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a metal pipe processing device for highway bridge construction which is simple to operate and highly efficient; through hydraulic support, it can provide sufficient support during bending and can be smoothly removed after the pressure is reduced. At the same time, since the hydraulic system does not directly contact the pipe fittings, there is no need to seal them by end welding or the like, and there is no need to add a cleaning step after bending.

[0006] Moreover, in order to simplify the operation process, the present invention also proposes a sliding locking assembly and a positioning assembly. Through the single drive of the hydraulic drive assembly, not only can the flexible liquid storage chamber be fully expanded, but also the locking slider and the clamping slider can be pushed to slide and resist the pipe fitting at the same time, and the sliding locking assembly and the clamping hydraulic chamber can be kept locked during the bending process; not only that, when the pressure is reduced, the sliding reset of the locking slider and the clamping slider can be automatically realized; the structure and operation steps are greatly simplified.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a metal pipe processing device for highway bridge construction, including an internal bending support mechanism, a self-positioning bending mechanism, a clamping and positioning mechanism, and a frame. The internal bending support mechanism is arranged on the frame, the self-positioning bending mechanism is arranged on the frame, and the clamping and positioning mechanism is arranged on the frame.

[0008] Further, the internal bending support mechanism includes an anti-collapse component, a pressure locking component, a hydraulic drive component, and a hydraulic transmission component. The anti-collapse component is located between the self-positioning bending mechanism and the clamping and positioning mechanism. The pressure locking component is arranged in the anti-collapse component. The hydraulic drive component is arranged on the frame. The hydraulic transmission component is arranged between the pressure locking component and the hydraulic drive component.

[0009] Through a single step of pressurization, the internal bending support mechanism can achieve the support and one-end fixation of the anti-collapse component, which can not only avoid obvious collapse of the pipe fitting during the bending process, but also solve the problem that "the pipe fitting will be elongated during bending, but the flexible liquid storage cavity cannot be elongated" through the relative sliding between the flexible liquid storage cavity and the pipe fitting.

[0010] Preferably, the anti-collapse component includes a pipe fitting, a steel wire layer, and a flexible liquid storage cavity. The pipe fitting is located between the self-positioning bending mechanism and the clamping and positioning mechanism. The steel wire layer is buried in the wall of the flexible liquid storage cavity. Metal scales are arranged in an array on the outside of the flexible liquid storage cavity. The flexible liquid storage cavity is located at the part of the pipe fitting to be bent.

[0011] The steel wire layer can maintain the length of the flexible liquid storage cavity, avoid its elongation under pressure, and thus ensure the support effect. The metal scales can reduce the friction between the flexible liquid storage cavity and the pipe fitting, which can not only improve the wear resistance of the flexible liquid storage cavity, but also avoid the problem that the flexible liquid storage cavity is stretched when the pipe fitting is stretched at the bending part.

[0012] As a further preference of the present invention, the pressure locking component includes a return spring, an expansion locking ring, and a sliding locking top ring. The sliding locking top ring slides on the end of the flexible liquid storage cavity. One end of the return spring is arranged on the sliding locking top ring, and the other end of the return spring is fixedly connected to the inside of the flexible liquid storage cavity. The expansion locking ring is fixedly connected to the flexible liquid storage cavity. A first ramp portion is arranged on the expansion locking ring, and a ramp portion is arranged on the sliding locking top ring. The expansion locking ring and the sliding locking top ring cooperate through the first ramp portion and the ramp portion.

[0013] When the internal pressure of the flexible liquid storage cavity increases to a certain extent, the sliding locking top ring can slide out of the flexible liquid storage cavity, and through the cooperation of the first ramp portion and the ramp portion, it can achieve the top support of the expansion locking ring, thereby increasing the extrusion force and friction force between the expansion locking ring and the pipe fitting, and achieving the technical effect of fixing one end of the flexible liquid storage cavity in the pipe fitting.

[0014] Preferably, the hydraulic drive assembly includes a hydraulic cylinder bracket, a hydraulic cylinder body, a hydraulic push rod, and a hydraulic adjustment nut. The hydraulic cylinder bracket is provided on the frame, the hydraulic cylinder body is provided on the sliding locking top ring, the hydraulic push rod is snap-fitted and slidably arranged in the hydraulic cylinder body, a screw rod portion is provided on the hydraulic push rod, the hydraulic adjustment nut is fixedly connected in the hydraulic cylinder bracket, and the hydraulic adjustment nut is threadedly connected to the screw rod portion.

[0015] As a further preference of the present invention, the hydraulic transmission assembly includes a hydraulic pipeline and an intermediate joint. The two ends of the hydraulic pipeline are respectively provided on the sliding locking top ring and the hydraulic pipeline, the intermediate joint is provided at the middle position of the hydraulic pipeline, and a pressure gauge is provided on the intermediate joint.

[0016] The intermediate joint is connected to the locking hydraulic chamber and the clamping hydraulic chamber through a hydraulic pipeline. Therefore, when the liquid pressure is increased by the hydraulic drive assembly, the pressures in the locking hydraulic chamber and the clamping hydraulic chamber will also increase accordingly, so as to realize the position fixation of the clamping slider and the locking slider.

[0017] Furthermore, the self-positioning bending mechanism includes a rotary bending assembly and a sliding locking assembly. The rotary bending assembly is provided on the frame, the sliding locking assemblies are symmetrically provided on the rotary bending assembly, and the sliding locking assemblies are connected to the intermediate joint through hydraulic pipes.

[0018] Preferably, the rotary bending assembly includes a fixed rotating shaft, a bending guide wheel, a bending fork frame, a limiting shaft, and a limiting wheel. The fixed rotating shaft is fixedly connected to the frame, the bending guide wheel is rotatably arranged on the fixed rotating shaft, the bending fork frame is rotatably arranged on the fixed rotating shaft, a through sliding groove is provided on the bending fork frame, the limiting shaft is slidably arranged in the sliding groove, the limiting wheel is rotatably arranged on the limiting shaft, the limiting wheel is in rolling contact with the pipe fitting, and a telescopic handle is further provided at the end of the bending fork frame.

[0019] The sliding amplitude of the limiting wheel can be restricted by the sliding locking assembly, so as to achieve the technical effect of bending the pipe fitting when rotating the bending fork frame.

[0020] The sliding locking assembly includes a locking hydraulic chamber, a locking piston, a locking slider, and a first retraction spring. The locking hydraulic chamber is provided on the bending fork frame, the locking piston is snap-fitted and slidably arranged in the locking hydraulic chamber, the locking slider is slidably arranged on the bending fork frame, a central hole is provided on the locking slider, the limiting shaft is arranged in the central hole, the first retraction spring is arranged between the locking slider and the locking hydraulic chamber, and the locking hydraulic chamber is connected to the intermediate joint through a hydraulic pipe.

[0021] Furthermore, the clamping and positioning mechanism includes a limit baffle, a positioning bracket and a positioning component. The limit baffle and the positioning bracket are fixedly connected to the frame, and the positioning component is arranged on the positioning bracket.

[0022] Preferably, the positioning component includes a clamping hydraulic cavity, a clamping piston, a clamping slider and a second retraction spring. The clamping hydraulic cavity is arranged on the positioning bracket. The clamping piston is snap-fitted and slidably arranged in the clamping hydraulic cavity. The clamping slider is slidably arranged on the positioning bracket. A guide shaft is arranged on the clamping slider and is slidably arranged in the clamping hydraulic cavity. The second retraction spring is sleeved on the guide shaft and is arranged between the clamping hydraulic cavity and the clamping slider. The clamping hydraulic cavity is connected to the intermediate joint through a hydraulic pipe.

[0023] The beneficial effects achieved by the present invention with the above structure are as follows:

[0024] (1) Through the way of shunting by the intermediate joint, the position adjustment, locking and fixing, and sliding reset of the sliding locking component and the positioning component can be realized by controlling the pressure of the hydraulic driving component.

[0025] (2) The internal bending support mechanism can realize the support and one-end fixation of the anti-collapse component through a single step of pressurization, which can not only avoid obvious collapse of the pipe fitting during the bending process, but also solve the problem that "the pipe fitting will be elongated during bending, but the flexible liquid storage cavity cannot be elongated" through the relative sliding between the flexible liquid storage cavity and the pipe fitting.

[0026] (3) The wire layer can maintain the length of the flexible liquid storage cavity, avoid its elongation under pressure, and thus ensure the support effect. The metal scales can reduce the friction between the flexible liquid storage cavity and the pipe fitting, which can not only improve the wear resistance of the flexible liquid storage cavity, but also avoid the problem that the flexible liquid storage cavity is stretched when the pipe fitting is stretched at the bending part.

[0027] (4) When the internal pressure of the flexible liquid storage cavity increases to a certain extent, the sliding locking top ring can slide out of the flexible liquid storage cavity, and through the cooperation of the first slope part and the slope part, the expansion locking ring can be propped up, thereby increasing the extrusion force and friction force between the expansion locking ring and the pipe fitting, and realizing the technical effect of fixing one end of the flexible liquid storage cavity in the pipe fitting.

[0028] (5) The intermediate joint is connected to the locking hydraulic cavity and the clamping hydraulic cavity through hydraulic pipelines. Therefore, when the liquid pressure is increased by the hydraulic driving component, the pressure in the locking hydraulic cavity and the clamping hydraulic cavity will also increase accordingly, so as to realize the position fixation of the clamping slider and the locking slider.

[0029] (6) The sliding locking component can limit the sliding amplitude of the limit wheel, so as to realize the technical effect of bending the pipe fitting when rotating the bending fork. Brief Description of the Drawings

[0030] Figure 1 is a perspective view of a metal pipe processing device for highway bridge construction proposed by the present invention;

[0031] Figure 2 is a front view of a metal pipe processing device for highway bridge construction proposed by the present invention;

[0032] Figure 3 is a left view of a metal pipe processing device for highway bridge construction proposed by the present invention;

[0033] Figure 4 is a top view of a metal pipe processing device for highway bridge construction proposed by the present invention;

[0034] Figure 5 is Figure 2 a sectional view taken along the cutting line A-A in

[0035] Figure 6 is Figure 3 a sectional view taken along the cutting line B-B in

[0036] Figure 7 is an exploded structural schematic diagram of a metal pipe processing device for highway bridge construction proposed by the present invention;

[0037] Figure 8 is Figure 6 a partial enlarged view of part Ⅰ in

[0038] Figure 9 is Figure 5 a partial enlarged view of part Ⅱ in

[0039] Figure 10 is Figure 7 a partial enlarged view of part Ⅲ in

[0040] Figure 11 is Figure 7 a partial enlarged view of part Ⅳ in

[0041] Among them, 1. Internal bending support mechanism, 2. Self-positioning bending mechanism, 3. Clamping and positioning mechanism, 4. Frame, 5. Anti-collapse component, 6. Pressure locking component, 7. Hydraulic drive component, 8. Hydraulic transmission component, 9. Pipe fitting, 10. Steel wire layer, 11. Flexible liquid storage cavity, 12. Return spring, 13. Expansion locking ring, 14. Sliding locking top ring, 15. Hydraulic cylinder support, 16. Hydraulic cylinder body, 17. Hydraulic push rod, 18. Hydraulic adjustment nut, 19. Hydraulic pipeline, 20. Intermediate joint, 21. Metal scale, 22. First slope part, 23. Slope part, 24. Screw part, 25. Pressure gauge, 26. Rotary bending component, 27. Sliding locking component, 28. Fixed rotating shaft, 29. Bending guide wheel, 30. Bending fork, 31. Limiting shaft, 32. Limiting wheel, 33. Locking hydraulic cavity, 34. Locking piston, 35. Locking slider, 36. First retraction spring, 37. Sliding groove, 38. Telescopic handle, 39. Central hole, 40. Limiting baffle, 41. Positioning support, 42. Positioning component, 43. Clamping hydraulic cavity, 44. Clamping piston, 45. Clamping slider, 46. Second retraction spring, 47. Guide shaft.

[0042] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the description. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0045] As Figures 1 to 11 shown, the present invention provides a metal pipe processing device for highway bridge construction, including an internal bending support mechanism 1, a self-positioning bending mechanism 2, a clamping and positioning mechanism 3, and a frame 4. The internal bending support mechanism 1 is arranged on the frame 4, the self-positioning bending mechanism 2 is arranged on the frame 4, and the clamping and positioning mechanism 3 is arranged on the frame 4.

[0046] The internal bending support mechanism 1 includes an anti-collapse component 5, a pressure locking component 6, a hydraulic driving component 7, and a hydraulic transmission component 8. The anti-collapse component 5 is located between the self-positioning bending mechanism 2 and the clamping and positioning mechanism 3. The pressure locking component 6 is arranged in the anti-collapse component 5. The hydraulic driving component 7 is arranged on the frame 4. The hydraulic transmission component 8 is arranged between the pressure locking component 6 and the hydraulic driving component 7.

[0047] Through a single step of pressurization, the internal bending support mechanism 1 can achieve the support of the anti-collapse component 5 and the fixation of one end, which can not only avoid obvious collapse of the pipe fitting 9 during the bending process, but also solve the problem that "the pipe fitting 9 will be stretched during bending, but the flexible liquid storage cavity 11 cannot be stretched" through the relative sliding between the flexible liquid storage cavity 11 and the pipe fitting 9.

[0048] The anti-collapse component 5 includes a pipe fitting 9, a steel wire layer 10, and a flexible liquid storage cavity 11. The pipe fitting 9 is located between the self-positioning bending mechanism 2 and the clamping and positioning mechanism 3. The steel wire layer 10 is embedded in the wall of the flexible liquid storage cavity 11. Metal scales 21 are arranged in an array on the outside of the flexible liquid storage cavity 11. The flexible liquid storage cavity 11 is located at the part of the pipe fitting 9 to be bent.

[0049] The steel wire layer 10 can maintain the length of the flexible liquid storage cavity 11, avoid its elongation under pressure, and thus ensure the support effect. The metal scales 21 can reduce the friction between the flexible liquid storage cavity 11 and the pipe fitting 9, which can not only improve the wear resistance of the flexible liquid storage cavity 11, but also avoid the problem that the flexible liquid storage cavity 11 is stretched when the pipe fitting 9 is stretched at the bending part.

[0050] The pressure locking component 6 includes a return spring 12, an expansion locking ring 13, and a sliding locking top ring 14. The sliding locking top ring 14 is slidably arranged at the end of the flexible liquid storage cavity 11. One end of the return spring 12 is arranged on the sliding locking top ring 14. The other end of the return spring 12 is fixedly connected to the inside of the flexible liquid storage cavity 11. The expansion locking ring 13 is fixedly connected to the flexible liquid storage cavity 11. A ramp portion 23-1 is arranged on the expansion locking ring 13. A ramp portion 23 is arranged on the sliding locking top ring 14. The expansion locking ring 13 and the sliding locking top ring 14 are matched through the ramp portion 23-1 and the ramp portion 23.

[0051] When the internal pressure of the flexible liquid storage cavity 11 increases to a certain extent, the sliding locking top ring 14 can slide out from the flexible liquid storage cavity 11, and through the cooperation of the ramp portion 23-1 and the ramp portion 23, the expansion locking ring 13 can be propped up, thereby increasing the extrusion force and friction force between the expansion locking ring 13 and the pipe fitting 9, and achieving the technical effect of fixing one end of the flexible liquid storage cavity 11 in the pipe fitting 9.

[0052] The hydraulic drive assembly 7 includes a hydraulic cylinder bracket 15, a hydraulic cylinder body 16, a hydraulic push rod 17, and a hydraulic adjusting nut 18. The hydraulic cylinder bracket 15 is arranged on the frame 4, the hydraulic cylinder body 16 is arranged on the sliding locking top ring 14, the hydraulic push rod 17 is snap-fitted and slidably arranged in the hydraulic cylinder body 16. A screw rod portion 24 is provided on the hydraulic push rod 17. The hydraulic adjusting nut 18 is fixedly connected in the hydraulic cylinder bracket 15, and the hydraulic adjusting nut 18 is threadedly connected to the screw rod portion 24.

[0053] The hydraulic transmission assembly 8 includes a hydraulic pipeline 19 and an intermediate joint 20. The two ends of the hydraulic pipeline 19 are respectively arranged on the sliding locking top ring 14 and the hydraulic pipeline 19. The intermediate joint 20 is arranged at the middle position of the hydraulic pipeline 19, and a pressure gauge 25 is provided on the intermediate joint 20.

[0054] The intermediate joint 20 is connected to the locking hydraulic cavity 33 and the clamping hydraulic cavity 43 through a hydraulic pipeline. Therefore, when the liquid pressure is increased by the hydraulic drive assembly 7, the pressures in the locking hydraulic cavity 33 and the clamping hydraulic cavity 43 will also increase accordingly, so as to realize the position fixation of the clamping slider 45 and the locking slider 35.

[0055] The self-positioning bending mechanism 2 includes a rotary bending assembly 26 and a sliding locking assembly 27. The rotary bending assembly 26 is arranged on the frame 4, the sliding locking assembly 27 is symmetrically arranged on the rotary bending assembly 26, and the sliding locking assembly 27 and the intermediate joint 20 are connected through a hydraulic pipe.

[0056] The rotary bending assembly 26 includes a fixed rotating shaft 28, a bending guide wheel 29, a bending fork frame 30, a limiting shaft 31, and a limiting wheel 32. The fixed rotating shaft 28 is fixedly connected to the frame 4, the bending guide wheel 29 is rotatably arranged on the fixed rotating shaft 28, the bending fork frame 30 is rotatably arranged on the fixed rotating shaft 28. A through sliding groove 37 is provided on the bending fork frame 30. The limiting shaft 31 is slidably arranged in the sliding groove 37. The limiting wheel 32 is rotatably arranged on the limiting shaft 31. The limiting wheel 32 is in rolling contact with the pipe fitting 9. A telescopic handle 38 is further arranged at the end of the bending fork frame 30.

[0057] The sliding amplitude of the limiting wheel 32 can be restricted through the sliding locking assembly 27, so as to achieve the technical effect of bending the pipe fitting 9 when the bending fork frame 30 rotates.

[0058] The sliding locking assembly 27 includes a locking hydraulic cavity 33, a locking piston 34, a locking slider 35, and a first retraction spring 36. The locking hydraulic cavity 33 is arranged on the bending fork frame 30. The locking piston 34 is snap-fitted and slidably arranged in the locking hydraulic cavity 33. The locking slider 35 is slidably arranged on the bending fork frame 30. A central hole 39 is provided on the locking slider 35. The limiting shaft 31 is arranged in the central hole 39. The first retraction spring 36 is arranged between the locking slider 35 and the locking hydraulic cavity 33. The locking hydraulic cavity 33 and the intermediate joint 20 are connected through a hydraulic pipe.

[0059] The clamping and positioning mechanism 3 includes a limit baffle 40, a positioning bracket 41 and a positioning component 42. The limit baffle 40 and the positioning bracket 41 are fixedly connected to the frame 4, and the positioning component 42 is arranged on the positioning bracket 41.

[0060] The positioning component 42 includes a clamping hydraulic cavity 43, a clamping piston 44, a clamping slider 45 and a second retraction spring 46. The clamping hydraulic cavity 43 is arranged on the positioning bracket 41. The clamping piston 44 is snap-fitted and slidably arranged in the clamping hydraulic cavity 43. The clamping slider 45 is slidably arranged on the positioning bracket 41. A guide shaft 47 is arranged on the clamping slider 45. The guide shaft 47 is slidably arranged in the clamping hydraulic cavity 43. The second retraction spring 46 is sleeved on the guide shaft 47. The second retraction spring 46 is arranged between the clamping hydraulic cavity 43 and the clamping slider 45. The clamping hydraulic cavity 43 and the intermediate joint 20 are connected by a hydraulic pipe.

[0061] During specific use, in the initial state, the locking slider 35 is far away from the bending guide wheel 29 under the pulling force of the first retraction spring 36, and the clamping slider 45 is far away from the limit baffle 40 under the pulling force of the second retraction spring 46. At this time, the pipe fitting 9 is placed between the clamping slider 45 and the positioning bracket 41, and at the same time, it is placed between the bending guide wheel 29 and the limit wheel 32. Then, the hydraulic push rod 17 is rotated manually or electrically. Through the threaded cooperation of the screw part 24 and the hydraulic adjusting nut 18, the transmission fluid in the hydraulic cylinder bracket 15 can be extruded outwards. Through the diversion of the intermediate joint 20, the liquid in the hydraulic cylinder bracket 15 will flow towards the flexible liquid storage cavity 11, the locking slider 35 and the clamping slider 45.

[0062] When the liquid enters the clamping hydraulic cavity 43, the clamping piston 44 will extend, and through the inclined surface cooperation, it will push the clamping slider 45 to slide towards the positioning bracket 41 until the clamping slider 45 abuts against the pipe fitting 9 and applies a certain extrusion force. When the liquid enters the locking hydraulic cavity 33, the locking piston 34 will extend, and through the inclined surface cooperation, it will push the locking slider 35 to slide towards the bending guide wheel 29 until the locking slider 35 abuts against the pipe fitting 9 and applies a certain extrusion force. At this time, the initial position fixing of the pipe fitting 9 is completed.

[0063] Continue to increase the pressure. When the pressure in the flexible liquid storage cavity 11 increases to a certain extent, the sliding locking top ring 14 will slide out of the flexible liquid storage cavity 11 and enter the sliding locking top ring 14. At this time, the flexible liquid storage cavity 11 contacts the inner wall of the pipe fitting 9 through the metal scale 21.

[0064] Since the slope part 23-1 cooperates with the slope part 23, and the expansion locking ring 13 has a certain elasticity while the sliding locking top ring 14 has no elasticity, when the sliding locking top ring 14 enters the expansion locking ring 13, the diameter of the expansion locking ring 13 will increase. At this time, the extrusion force and frictional force between the expansion locking ring 13 and the pipe fitting 9 increase, realizing the position fixation of one end of the flexible liquid storage cavity 11.

[0065] The pressure gauge 25 can display the pressure indication in the flexible liquid storage cavity 11. When the pressure indication in the flexible liquid storage cavity 11 increases to a certain extent, the fixed rotating shaft 28 is closed. After that, the liquids in the flexible liquid storage cavity 11, the locking hydraulic cavity 33, the clamping hydraulic cavity 43, and the hydraulic cylinder bracket 15 are not communicated with each other, and the pressure gauge 25 always displays the pressure indication in the flexible liquid storage cavity 11.

[0066] Then, the bending fork 30 is rotated manually or with the assistance of an external device. Since the farthest positions of the locking slider 35 and the clamping slider 45 are both limited at this time, when the bending fork 30 is rotated, the bending of the pipe fitting 9 can be realized.

[0067] During the bending process of the pipe fitting 9, there will actually be a small amount of elongation at the bending part. Since the expansion locking ring 13 and the pipe fitting 9 are relatively fixed, and the flexible liquid storage cavity 11 can only be bent and cannot be stretched, there will inevitably be relative sliding between the flexible liquid storage cavity 11 and the pipe fitting 9. By the way of the metal scales 21 contacting the pipe fitting 9, on the one hand, the metal scales 21 distributed densely can still maintain the internal support for the pipe fitting 9, and on the other hand, the relatively small frictional force between the metal scales 21 and the pipe fitting 9 and the material advantages of the metal scales 21 itself can also make the metal scales 21 have stronger wear resistance than the flexible liquid storage cavity 11.

[0068] After the bending is completed, the intermediate joint 20 is unlocked to re-connect the flexible liquid storage cavity 11, the locking hydraulic cavity 33, the clamping hydraulic cavity 43, and the hydraulic cylinder bracket 15. And by rotating the hydraulic push rod 17 in the reverse direction, the pressure in the hydraulic cylinder bracket 15 is reduced. At this time, both the sliding locking assembly 27 and the positioning assembly 42 will reset; and the sliding locking top ring 14 will retract into the flexible liquid storage cavity 11 under the elastic force of the return spring 12. At this time, the flexible liquid storage cavity 11 as a whole can be taken out; if the sliding locking top ring 14 gets stuck and cannot be reset by the return spring 12, a long rod can be used to push the sliding locking top ring 14 into the flexible liquid storage cavity 11 from the end, and the same effect can also be achieved.

[0069] After the pressure is relieved, the bending fork 30 is reset, and the pipe fitting 9 can be pulled out from the direction where the bending end is located.

[0070] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0071] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, creatively design a structural manner and an embodiment similar to the technical solution, they shall fall within the protection scope of the present invention.

Claims

1. A metal pipe processing device for highway bridge construction, characterized in that: It includes an internal bending support mechanism (1), a self-positioning bending mechanism (2), a clamping and positioning mechanism (3), and a frame (4). The internal bending support mechanism (1) is arranged on the frame (4), the self-positioning bending mechanism (2) is arranged on the frame (4), and the clamping and positioning mechanism (3) is arranged on the frame (4). The internal bending support mechanism (1) includes a collapse prevention component (5), a pressure locking component (6), a hydraulic driving component (7), and a hydraulic transmission component (8). The collapse prevention component (5) is located between the self-positioning bending mechanism (2) and the clamping and positioning mechanism (3). The pressure locking component (6) is arranged in the collapse prevention component (5). The hydraulic driving component (7) is arranged on the frame (4), and the hydraulic transmission component (8) is arranged between the pressure locking component (6) and the hydraulic driving component (7). The collapse prevention component (5) includes a pipe fitting (9), a steel wire layer (10), and a flexible liquid storage cavity (11). The pipe fitting (9) is located between the self-positioning bending mechanism (2) and the clamping and positioning mechanism (3). The steel wire layer (10) is embedded in the wall of the flexible liquid storage cavity (11). The outer part of the flexible liquid storage cavity (11) is provided with metal scales (21) in an array. The flexible liquid storage cavity (11) is located at the part to be bent in the pipe fitting (9). The pressure locking component (6) includes a return spring (12), an expansion locking ring (13), and a sliding locking top ring (14). The sliding locking top ring (14) is slidably arranged at the end of the flexible liquid storage cavity (11). One end of the return spring (12) is arranged on the sliding locking top ring (14), and the other end of the return spring (12) is fixedly connected to the inside of the flexible liquid storage cavity (11). The expansion locking ring (13) is fixedly connected to the flexible liquid storage cavity (11). A first ramp portion (23) is arranged on the expansion locking ring (13), and a ramp portion (23) is arranged on the sliding locking top ring (14). The expansion locking ring (13) and the sliding locking top ring (14) are matched through the first ramp portion (23) and the ramp portion (23). When the internal pressure of the flexible liquid storage cavity 11 increases to a certain extent, the sliding locking top ring 14 can slide out from the flexible liquid storage cavity 11, and through the cooperation of the first ramp portion 23 and the ramp portion 23, the expansion locking ring 13 can be propped up, thereby increasing the extrusion force and friction force between the expansion locking ring 13 and the pipe fitting 9.

2. The metal pipe processing device for highway bridge construction according to claim 1, characterized in that: The hydraulic driving component (7) includes a hydraulic cylinder bracket (15), a hydraulic cylinder body (16), a hydraulic push rod (17), and a hydraulic adjusting nut (18). The hydraulic cylinder bracket (15) is arranged on the frame (4). The hydraulic cylinder body (16) is arranged on the sliding locking top ring (14). The hydraulic push rod (17) is clamped and slidably arranged in the hydraulic cylinder body (16). A screw portion (24) is arranged on the hydraulic push rod (17). The hydraulic adjusting nut (18) is fixedly connected in the hydraulic cylinder bracket (15), and the hydraulic adjusting nut (18) is threadedly connected with the screw portion (24).

3. A metal pipe processing device for highway bridge construction according to claim 2, characterized in that: The hydraulic transmission component (8) includes a hydraulic pipeline (19) and an intermediate joint (20). The two ends of the hydraulic pipeline (19) are respectively arranged on the sliding locking top ring (14) and the hydraulic pipeline (19). The intermediate joint (20) is arranged at the middle position of the hydraulic pipeline (19), and a pressure gauge (25) is arranged on the intermediate joint (20).

4. A metal pipe processing device for highway bridge construction according to claim 3, characterized in that: The self-positioning bending mechanism (2) includes a rotary bending component (26) and a sliding locking component (27). The rotary bending component (26) is arranged on the frame (4), and the sliding locking components (27) are symmetrically arranged on the rotary bending component (26). A hydraulic pipe is connected between the sliding locking component (27) and the intermediate joint (20).

5. The metal pipe processing device for highway bridge construction according to claim 4, characterized in that: The rotary bending component (26) includes a fixed rotating shaft (28), a bending guide wheel (29), a bending fork frame (30), a limiting shaft (31) and a limiting wheel (32). The fixed rotating shaft (28) is fixedly connected to the frame (4). The bending guide wheel (29) is rotatably arranged on the fixed rotating shaft (28). The bending fork frame (30) is rotatably arranged on the fixed rotating shaft (28). A through sliding groove (37) is arranged on the bending fork frame (30). The limiting shaft (31) is slidably arranged in the sliding groove (37). The limiting wheel (32) is rotatably arranged on the limiting shaft (31). The limiting wheel (32) is in rolling contact with the pipe fitting (9). An expansion and contraction handle (38) is further arranged at the end of the bending fork frame (30).

6. The metal pipe processing device for highway bridge construction according to claim 5, characterized in that: The sliding locking component (27) includes a locking hydraulic cavity (33), a locking piston (34), a locking slider (35) and a first retraction spring (36). The locking hydraulic cavity (33) is arranged on the bending fork frame (30). The locking piston (34) is snap-fitted and slidably arranged in the locking hydraulic cavity (33). The locking slider (35) is slidably arranged on the bending fork frame (30). A central hole (39) is arranged on the locking slider (35). The limiting shaft (31) is arranged in the central hole (39). The first retraction spring (36) is arranged between the locking slider (35) and the locking hydraulic cavity (33).

7. A metal pipe processing device for highway bridge construction according to claim 6, characterized in that: The clamping and positioning mechanism (3) includes a limiting baffle (40), a positioning bracket (41) and a positioning component (42). The limiting baffle (40) and the positioning bracket (41) are fixedly connected to the frame (4). The positioning component (42) is arranged on the positioning bracket (41).

8. A metal pipe processing device for highway bridge construction according to claim 7, characterized in that: The positioning component (42) includes a clamping hydraulic cavity (43), a clamping piston (44), a clamping slider (45) and a second retraction spring (46). The clamping hydraulic cavity (43) is arranged on the positioning bracket (41). The clamping piston (44) is snap-fitted and slidably arranged in the clamping hydraulic cavity (43). The clamping slider (45) is slidably arranged on the positioning bracket (41). A guiding shaft (47) is arranged on the clamping slider (45). The guiding shaft (47) is slidably arranged in the clamping hydraulic cavity (43). The second retraction spring (46) is sleeved on the guiding shaft (47). The second retraction spring (46) is arranged between the clamping hydraulic cavity (43) and the clamping slider (45).

Images