Metal pipe machining device for highway bridge construction

Abstract

The invention belongs to the technical field of metal pipe bending, and particularly discloses a metal pipe machining device for highway bridge construction, which comprises an internal bending supporting mechanism, a self-positioning bending mechanism, a clamping positioning mechanism and a rack, the internal bending supporting mechanism is arranged on the rack, the self-positioning bending mechanism is arranged on the rack, and the clamping positioning mechanism is arranged on the rack. And the clamping and positioning mechanism is arranged on the rack. By means of a hydraulic supporting mode, enough supporting can be provided during bending, the pipe fitting can be taken out smoothly after pressure is reduced, and meanwhile, due to the fact that a hydraulic system does not make direct contact with the pipe fitting, plugging through an end welding mode and the like is not needed, and a cleaning step does not need to be added after bending.

Description

Technical Field

[0001] The present 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 and the like, metal pipes are a very common component material and are widely used in multiple aspects such as guardrails, handrails, and equipment installation brackets. Metal pipe bending is a quite common process in metal pipe processing. However, since the pipe has a hollow structure, when bending, the bent part will inevitably collapse and become flattened. This not only affects the appearance but also leads to a decrease in the strength of the bent part. Therefore, for the bending of pipe fittings, generally, the method of internal support is used to reduce the degree of its collapse.

[0003] When bending plastic pipes, metal springs are often filled inside because the strength of metal is much greater than that of plastic. However, when bending metal pipes, it is very difficult to find a material with a strength much higher than that of metal pipes. Even if there is such a material, it does not have enough elasticity to be smoothly taken out from the bent pipe after bending.

[0004] In actual operation, sometimes the sand filling method is adopted; this internal support method is very ingenious, but it is more complex in specific implementation. Since the bulk sand material has no separate wrapping, how to perform high-strength sealing on both ends of the pipe fitting is a relatively complex problem. In the prior art, the method of end welding is mostly used; and after the sand is taken out, an additional cleaning step needs to be added to the pipe fitting. Relatively speaking, the entire process of assisting bending and avoiding its collapse is more complex and has a lower efficiency in mass production. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the prior art, the present invention proposes a metal pipe processing device for highway bridge construction with simple operation and high efficiency; through the hydraulic support method, it can not only provide sufficient support during bending but also be smoothly taken out after reducing the pressure. At the same time, since the hydraulic system does not directly contact the pipe fitting, there is no need to perform sealing by means of end welding or the like, nor is it necessary 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 cavity be fully expanded, but also the locking slider and the clamping slider can be simultaneously pushed to slide and abut against the pipe fitting, and the sliding locking assembly and the clamping hydraulic cavity can be locked during the bending process; moreover, when the pressure is reduced, the sliding reset of the locking slider and the clamping slider can be automatically realized; greatly simplifying the structure and operation steps.

[0007] The technical solution adopted by the present invention is as follows: The present invention provides a metal pipe processing device for highway bridge construction, which includes 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] Furthermore, the internal bending support mechanism includes an anti-collapse component, a pressure locking component, a hydraulic driving 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 driving component is arranged on the frame. The hydraulic transmission component is arranged between the pressure locking component and the hydraulic driving 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 stretched during bending, but the flexible liquid storage cavity cannot be stretched" 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 embedded 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, prevent it from elongating 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 expansion locking ring, and the other end of the return spring is fixedly connected to the inside of the flexible liquid storage cavity. The sliding locking top ring is fixedly connected to the flexible liquid storage cavity. A first slope part is arranged on the expansion locking ring, and a slope part is arranged on the sliding locking top ring. The expansion locking ring and the sliding locking top ring cooperate through the first slope part and the slope part.

[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 slope part and the slope part, it can achieve the propping 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 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 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 pressure 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 assembly and the intermediate joint are connected through a hydraulic pipe.

[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 the bending fork frame rotates.

[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 and the intermediate joint are connected 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. The guide shaft 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 and the intermediate joint are connected by a hydraulic pipe.

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

[0024] (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 stretched during bending, but the flexible liquid storage cavity cannot be stretched" through the relative sliding between the flexible liquid storage cavity and the pipe fitting.

[0025] (3) The wire layer can maintain the length of the flexible liquid storage cavity, avoid its elongation under pressure, thus ensuring 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.

[0026] (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.

[0027] (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 drive component, the pressure in the locking hydraulic cavity and the clamping hydraulic cavity will also increase accordingly, thereby realizing the position fixation of the clamping slider and the locking slider.

[0028] (6) The sliding locking component can limit the sliding amplitude of the limit wheel, thereby realizing the technical effect of bending the pipe fitting when rotating the bending fork. Description of the Drawings

[0029] Figure 1 A perspective view of a metal pipe processing device for highway bridge construction proposed by the present invention; Figure 2 A front view of a metal pipe processing device for highway bridge construction proposed by the present invention; Figure 3 A left view of a metal pipe processing device for highway bridge construction proposed by the present invention; Figure 4 A top view of a metal pipe processing device for highway bridge construction proposed by the present invention; Figure 5 is Figure 2 A sectional view along the cutting line A-A in; Figure 6 is Figure 3 A sectional view along the cutting line B-B in; Figure 7 An exploded structural view of a metal pipe processing device for highway bridge construction proposed by the present invention; Figure 8 is Figure 6 A partial enlarged view of part Ⅰ in; Figure 9 is Figure 5 A partial enlarged view of part Ⅱ in; Figure 10 is Figure 7 A partial enlarged view of part Ⅲ in; Figure 11 is Figure 7 A partial enlarged view of part Ⅳ in.

[0030] 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 frame, 31. Limit shaft, 32. Limit 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. Limit baffle, 41. Positioning support, 42. Positioning component, 43. Clamping hydraulic cavity, 44. Clamping piston, 45. Clamping slider, 46. Second retraction spring, 47. Guide shaft.

[0031] The attached 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. Specific embodiments

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below 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 of them; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] 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 position relationship are based on the orientation or position relationship shown in the attached drawings, and 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.

[0034] 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.

[0035] 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.

[0036] Through a single step of pressurization, the internal bending support mechanism 1 can achieve the support and one-end fixation of the anti-collapse component 5, 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 elongated during bending, but the flexible liquid storage cavity 11 cannot be elongated" through the relative sliding between the flexible liquid storage cavity 11 and the pipe fitting 9.

[0037] 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.

[0038] 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.

[0039] 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 expansion locking ring 13. The other end of the return spring 12 is fixedly connected to the inside of the flexible liquid storage cavity 11. The sliding locking top ring 14 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.

[0040] 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.

[0041] The hydraulic drive assembly 7 includes a hydraulic cylinder bracket 15, a hydraulic cylinder body 16, a hydraulic push rod 17, and a hydraulic adjustment nut 18. The hydraulic cylinder bracket 15 is provided on the frame 4, the hydraulic cylinder body 16 is provided 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 adjustment nut 18 is fixedly connected in the hydraulic cylinder bracket 15, and the hydraulic adjustment nut 18 is threadedly connected to the screw rod portion 24.

[0042] The hydraulic transmission assembly 8 includes a hydraulic pipe 19 and an intermediate joint 20. Two ends of the hydraulic pipe 19 are respectively provided on the sliding locking top ring 14 and the hydraulic pipe 19, the intermediate joint 20 is provided at the middle position of the hydraulic pipe 19, and a pressure gauge 25 is provided on the intermediate joint 20.

[0043] The intermediate joint 20 is connected to the locking hydraulic cavity 33 and the clamping hydraulic cavity 43 through a hydraulic pipe. 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 fix the positions of the clamping slider 45 and the locking slider 35.

[0044] The self-positioning bending mechanism 2 includes a rotary bending assembly 26 and a sliding locking assembly 27. The rotary bending assembly 26 is provided on the frame 4, the sliding locking assemblies 27 are symmetrically arranged on the rotary bending assembly 26, and the sliding locking assemblies 27 and the intermediate joint 20 are connected through a hydraulic pipe.

[0045] 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, and a telescopic handle 38 is further provided at the end of the bending fork frame 30.

[0046] The sliding locking assembly 27 can limit the sliding amplitude of the limiting wheel 32, so as to achieve the technical effect of bending the pipe fitting 9 when rotating the bending fork frame 30.

[0047] 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 provided 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, and the locking hydraulic cavity 33 and the intermediate joint 20 are connected through a hydraulic pipe.

[0048] 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.

[0049] 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 engaged 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.

[0050] 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 shunt 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. 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.

[0051] 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. Due to the cooperation of the slope part 23-1 and the slope part 23, and the expansion locking ring 13 has a certain elasticity while the sliding locking top ring 14 has no elasticity. Therefore, 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 friction force between the expansion locking ring 13 and the pipe fitting 9 increase, realizing the position fixing of one end of the flexible liquid storage cavity 11.

[0052] 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. Thereafter, 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.

[0053] Then, the bending fork 30 is rotated manually or assisted by 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 achieved. 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 that the metal scales 21 contact the pipe fitting 9, on the one hand, through the densely distributed metal scales 21, the internal support for the pipe fitting 9 can still be maintained. On the other hand, the relatively small friction 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.

[0054] After the bending is completed, the intermediate joint 20 is unlocked to re - communicate 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, the sliding locking assembly 27 and the positioning assembly 42 will both 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 entire flexible liquid storage cavity 11 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.

[0055] After the pressure is relieved, the bending fork 30 is reset, and the pipe fitting 9 is drawn out from the direction where the bending end is located.

[0056] It should be noted that in this article, 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 term "including", "comprising" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0057] 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, design similar structural manners and embodiments to this technical solution without creative efforts, 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 comprises an internal bending support mechanism (1), a self-positioning bending mechanism (2), a clamping and positioning mechanism (3) and a frame (4), wherein 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) comprises an anti-collapse component (5), a pressure locking component (6), a hydraulic drive 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 positioning mechanism (3); the pressure locking component (6) is arranged in the anti-collapse component (5); the hydraulic drive 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 drive component (7).

2. The metal pipe processing device for highway bridge construction according to claim 1 is characterized in that: The anti-collapse component (5) comprises a pipe (9), a steel wire layer (10) and a flexible liquid storage chamber (11); the pipe (9) is located between a self-positioning bending mechanism (2) and a clamping positioning mechanism (3); the steel wire layer (10) is embedded in the wall of the flexible liquid storage chamber (11); an outer array of the flexible liquid storage chamber (11) is provided with metal scales (21); and the flexible liquid storage chamber (11) is located at a portion of the pipe (9) to be bent.

3. The metal pipe processing device for highway bridge construction according to claim 2 is characterized in that: The pressure locking assembly (6) comprises 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 chamber (11); one end of the return spring (12) is arranged on the expansion locking ring (13); the other end of the return spring (12) is fixedly connected to the inside of the flexible liquid storage chamber (11); the sliding locking top ring (14) is fixedly connected to the flexible liquid storage chamber (11); the expansion locking ring (13) is provided with a slope portion (23); the sliding locking top ring (14) is provided with a slope portion (23); the expansion locking ring (13) and the sliding locking top ring (14) are matched with each other through the slope portion (23) and the slope portion (23).

4. The metal pipe processing device for highway bridge construction according to claim 3 is characterized in that: The hydraulic drive assembly (7) comprises a hydraulic cylinder support (15), a hydraulic cylinder body (16), a hydraulic push rod (17) and a hydraulic adjustment nut (18); the hydraulic cylinder support (15) is arranged on a frame (4); the hydraulic cylinder body (16) is arranged on a sliding locking top ring (14); the hydraulic push rod (17) is slidably arranged in the hydraulic cylinder body (16); a screw portion (24) is provided on the hydraulic push rod (17); the hydraulic adjustment nut (18) is fixedly connected to the hydraulic cylinder support (15); and the hydraulic adjustment nut (18) and the screw portion (24) are threadedly connected.

5. The metal pipe processing device for highway bridge construction according to claim 4 is characterized in that: The hydraulic transmission assembly (8) comprises a hydraulic pipeline (19) and an intermediate joint (20), wherein two ends of the hydraulic pipeline (19) are respectively arranged on the sliding locking top ring (14) and the hydraulic pipeline (19), and the intermediate joint (20) is arranged at a middle position of the hydraulic pipeline (19), and a pressure gauge (25) is provided on the intermediate joint (20).

6. The metal pipe processing device for highway bridge construction according to claim 5 is characterized in that: The self-positioning bending mechanism (2) comprises a rotating bending component (26) and a sliding locking component (27); the rotating bending component (26) is arranged on the frame (4); the sliding locking component (27) is symmetrically arranged on the rotating bending component (26); and the sliding locking component (27) and the intermediate joint (20) are connected via a hydraulic pipe.

7. The metal pipe processing device for highway bridge construction according to claim 6 is characterized by: The rotary bending assembly (26) comprises 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) and the pipe fitting (9) are in rolling contact; and a telescopic handle (38) is also provided at the end of the bending fork frame (30).

8. The metal pipe processing device for highway bridge construction according to claim 7 is characterized in that: The sliding locking assembly (27) comprises a locking hydraulic chamber (33), a locking piston (34), a locking slider (35) and a retraction spring (36); the locking hydraulic chamber (33) is arranged on the bending fork frame (30); the locking piston (34) is slidably arranged in the locking hydraulic chamber (33); the locking slider (35) is slidably arranged on the bending fork frame (30); a center hole (39) is provided on the locking slider (35); the limiting shaft (31) is arranged in the center hole (39); and the retraction spring (36) is arranged between the locking slider (35) and the locking hydraulic chamber (33).

9. The metal pipe processing device for highway bridge construction according to claim 8, characterized in that: The clamping and positioning mechanism (3) comprises a limit baffle (40), a positioning bracket (41) and a positioning assembly (42); the limit baffle (40) and the positioning bracket (41) are fixedly connected to the frame (4); and the positioning assembly (42) is arranged on the positioning bracket (41).

10. The metal pipe processing device for highway bridge construction according to claim 9, characterized in that: The positioning assembly (42) comprises a clamping hydraulic chamber (43), a clamping piston (44), a clamping slider (45) and a second retraction spring (46); the clamping hydraulic chamber (43) is arranged on the positioning bracket (41); the clamping piston (44) is slidably arranged in the clamping hydraulic chamber (43); the clamping slider (45) is slidably arranged on the positioning bracket (41); a guide shaft (47) is provided on the clamping slider (45); the guide shaft (47) is slidably arranged in the clamping hydraulic chamber (43); the second retraction spring (46) is sleeved on the guide shaft (47); and the second retraction spring (46) is arranged between the clamping hydraulic chamber (43) and the clamping slider (45).

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