Method for making bracket using scrapped oil pipe

Abstract

The invention discloses a method for manufacturing a bracket using scrapped oil pipes. A pile driving mold, a mold matching tool, and a column correction fixture for driving oil pipe piles using the scrapped oil pipes are manufactured according to the positional relationship between the diameter of the scrapped oil pipes used in the designed bracket columns and the columns; a group of oil pipe piles are driven by the pile driving mold and the mold matching tool, and the group of oil pipe piles is used as a group of columns of a bracket; the verticality and center spacing of the group of columns are corrected by the column correction fixture and the columns are fixed, and then the group of columns is welded and fixed with reinforcement braces and supports for placing pipelines according to the designed bracket structure to manufacture the bracket; the pile driving mold consists of pile mold standpipes, cross braces, diagonal braces, a platform, and guardrails; the positional relationship such as the number and center spacing of the pile mold standpipes is the same as that of the bracket columns, and the cross braces and diagonal braces fix the positional relationship of the pile mold standpipes; the mold matching tool comprises a centralizer, a guide pile, a protective head, etc.; the column correction fixture consists of a correction frame, a clamping bar, and a U-shaped clip.

Description

Technical Field

[0001] The invention relates to a method for manufacturing a bracket by using scrapped oil pipes. Background Art

[0002] At present, in oil field production, when laying pipelines across pits and ditches, very economical and cheap oil pipes scrapped in oil field production are often designed and welded into rectangular supports. Like piers supporting bridges, the rectangular supports support the pipelines across the pits and ditches, so that the pipeline height is at the same elevation as or higher than the pipelines outside the pits and ditches. The number of supports is determined according to the width of the pits and ditches. The vertical columns of the rectangular supports are generally extended upward by about 0.5 meters as pipeline guardrails to prevent the pipelines placed on the supports from slipping. The vertical columns of the rectangular supports are extended downward for a section as support legs, which are inserted into the ground at the bottom of the pits and ditches to fix the supports. The length of the support legs inserted into the ground is designed by the design department according to the height of the support and the weight of the pipeline. Usually, the support legs designed for lighter pipelines or in shallow pits and ditches are inserted shallower into the pits and ditches, while the support legs designed for heavier pipelines or in deep pits and ditches are inserted deeper into the pits and ditches. The conventional method of welding a bracket made of scrap oil pipes typically involves first cutting the pipe into lengths of appropriate length according to the bracket's design dimensions on flat ground outside the pit or ditch, welding the bracket into a rectangular parallelepiped with guardrails and legs, then moving the bracket into the pit or ditch, and striking the bracket's uprights to drive (i.e., insert) the bracket legs into the ground to the designed depth. During this process, the bracket's upper surface is simultaneously adjusted to the desired depth, upon which the pipeline is placed. However, this method makes it difficult for the bracket legs to penetrate deep into the ground at the bottom of the pit or ditch. Furthermore, the bracket is irregular and not easily perpendicular to the ground, and is prone to sinking and tilting. This makes it suitable only for use with light pipelines or in shallow pits or ditches. It is prone to sinking and tilting in deep pits or ditches with heavy pipelines, making it particularly unusable in deep pits or ditches subject to strong currents and waves. Summary of the Invention

[0003] In view of the above, the purpose of the present invention is to overcome the defects of the prior art that it is difficult to insert the legs of scrapped oil pipe supports into the ground at the bottom of a deep pit ditch to reach the required deeper design depth, the supports are irregular, not easy to be perpendicular to the ground, and are prone to sinking and tilting. A method is provided that can drive the legs of scrapped oil pipe supports into the ground at the bottom of a deep pit ditch to the required deeper design depth, with the supports being regular and easy to be perpendicular to the ground.

[0004] The technical solution adopted by the present invention to solve its technical problem is: according to the positional relationship such as the diameter, number and center spacing of the scrapped oil pipes used in the designed support columns (the main columns of the support perpendicular to the ground), a pile driving mold, a mold matching tool and a column correction fixture for correcting the verticality and center spacing of the columns using the scrapped oil pipes are manufactured; the scrapped oil pipes are used to drive the oil pipe piles using the manufactured pile driving mold and the mold matching tool, and a group of oil pipe piles driven in this way is used as a group of columns of a support; the column correction fixture is used to correct the verticality and center spacing of this group of columns of the support and fix them in place, and then the group of columns is welded with reinforcement braces and supports for placing pipelines according to the designed support structure to manufacture the support.

[0005] Furthermore, the pile mold is composed of a pile mold riser, a platform, a guardrail, and a horizontal brace and an oblique brace. The inner diameter of the pile mold riser is slightly thicker than the outer diameter of the scrapped oil pipe female threaded coupling used for the support column. The number of roots, center spacing and other positional relationships of the pile mold riser are the same as the number of roots, center spacing and other positional relationships of the designed support column. The pile mold riser is fixed to maintain its positional relationship by horizontal braces, oblique braces and other fixed reinforcement supports welded on the pile mold riser. The platform is set on the upper horizontal brace and the upper oblique brace, about 1 meter below the upper end face of the pile mold riser. The guardrail is located above the platform, about 1 meter high, and is composed of the pile mold riser, guardrail horizontal brace and guardrail vertical brace welded above the platform; piling The function of the mold is to ensure that when the oil pipe pile is driven, the oil pipe is automatically straightened without tilting or even causing accidents, and to ensure that the oil pipe pile driven into the ground is basically perpendicular to the ground instead of tilting, and to ensure that the center spacing and other positional relationships between the oil pipe piles of a group of oil pipe piles driven into a bracket are basically the same as the columns designed for the bracket. In fact, they will not be exactly the same, because there will be some slight tilt during the pile driving process, and the center spacing of the piles will also deviate, especially when the piles are driven on soft mud ground. Therefore, it is necessary to use a column correction fixture to correct the verticality and center spacing of the columns and keep the columns fixed, so that welding the bracket is very easy.

[0006] Furthermore, the mold supporting tools include a centralizer, a guide pile and a tubing female threaded coupling protection head (hereinafter referred to as the protection head).

[0007] Furthermore, the centralizer is composed of a centralizer body, a centralizer handle and a centralizer hanging ear welded together, and is divided into two halves, left and right. When in use, the two halves are aligned together to ensure that the left and right halves form a cylinder when aligned together. The inner diameter of the cylinder is slightly larger than the outer diameter of the oil pipe body, the outer diameter of the centralizer body cylinder is slightly smaller than the inner diameter of the pile form riser, and the outer diameter of the centralizer hanging ear is equivalent to the outer diameter of the pile form riser. The function of the centralizer is to more accurately ensure that the oil pipe for piling is located in the center of the pile form riser.

[0008] Furthermore, the guide pile is composed of a guide pile tip, a guide pile body, a guide pile straightening ring and a guide pile lifting ring. The guide pile lifting ring is installed in the guide pile lifting ring mounting hole on the upper part of the guide pile to facilitate lifting of the guide pile by lifting equipment. The length from the guide pile straightening ring to the guide pile tip is generally about 2 meters, which can be appropriately lengthened or shortened according to the terrain conditions of pile driving. The length from the guide pile straightening ring to the guide pile lifting ring mounting hole is equivalent to the length of the pile mold riser of the pile driving mold. The outer diameter of the guide pile straightening ring is slightly smaller than the inner diameter of the pile mold riser. The outer diameter of the guide pile body is equivalent to the outer diameter of the scrapped oil pipe body used for piling. The function of the guide pile is to first drill a guide hole located in the center of the pile mold riser at the lower part of the pile mold riser before driving the first oil pipe in the pile mold riser, so that the front part of the first oil pipe can directly enter the guide hole and be located in the center of the pile mold riser without being deflected when driving the oil pipe pile.

[0009] Furthermore, the protective head is welded together by the protective head male thread, the protective head body and the protective head guide circular groove or formed as one piece by round steel on a lathe, and ensures that when the protective head male thread and the oil pipe female thread coupling are tightened, the lower edge of the protective head body can be tightly pressed together with the upper edge of the oil pipe female thread coupling to protect the oil pipe female thread coupling from damage when the hammer is struck. The function of the protective head guide circular groove is to ensure that the hammer can easily aim at the protective head body for striking.

[0010] Furthermore, the column correction fixture consists of a correction frame, a clamping bar and a U-shaped clip; the correction frame consists of a column correction column, horizontal braces, diagonal braces and vertical braces and other fixed reinforcement braces, all horizontal braces are perpendicular to the column correction column, the outer diameter of the column correction column is the same as the outer diameter of the bracket column, the number of roots is the same as the number of designed bracket columns, and the center spacing and other positional relationships of the column correction columns are to ensure that when the clamping bar and the U-shaped clip are clamped, the adjacent columns and column correction columns are in the same plane and close together, and to ensure that the center spacing and other positional relationships of the bracket columns after correction are exactly the same as the designed bracket. The principle is determined by geometric calculation. The position relationship of the column correction column remains unchanged through fixed reinforcement supports such as horizontal braces, diagonal braces and vertical braces. Small supports are welded at appropriate and necessary positions above and below the column correction column to place clamping bars. The clamping bar is a straight bar, and its outer diameter is equivalent to the inner diameter of the semicircular ring of the U-shaped clip. The bracket column can be firmly fixed to the column correction column through the clamping bar and the U-shaped clip, thereby ensuring that the verticality and center spacing of the bracket column and other positional relationships are exactly the same as the designed bracket and are fixed. Then the bracket is welded according to the designed bracket structure to achieve the design goal.

[0011] When making the bracket column, place the pile driving mold at the position where the bracket needs to be installed in the pit ditch, keep the platform level, insert the guide pile tip downward into a pile mold riser, and drop it to the ground below the pile mold riser, place the two halves of the centralizer in the pile mold riser respectively, and the two halves are aligned together. Under the action of the centralizer hanging ear, the centralizer is hung on the upper edge of the pile mold riser. Under the action of the centralizer and the guide pile centralizing ring, the guide pile is located in the center of the pile mold riser. Use a striking hammer (the vibrating hammer of the excavator can be used) to strike the guide pile, and the guide pile begins to enter the ground. Continue to strike, and the guide pile continues to go deeper. When the upper lifting ring of the guide pile approaches the centralizer, stop hitting the guide pile, then hang the guide pile lifting ring to lift out the guide pile, take out the centralizer, and the guide hole under the ground in the pile mold riser is formed. Under the action of the centralizer and the guide pile centralizing ring, this guide hole is located in the center of the pile mold riser.

[0012] Put the centralizer into the pile form riser with the guide hole just drilled, tighten the protective head on a female threaded coupling of the oil pipe, lift the oil pipe, insert the male thread of the oil pipe into the centralizer in the pile form riser with the male thread facing downward, and drop it into the guide hole below the pile form riser. Use a hammer to hit the protective head body on the upper part of the oil pipe. The oil pipe begins to enter the ground along the guide hole. Continue to hit the protective head and the oil pipe continues to go deeper. Stop hitting when the height of the upper edge of the female threaded coupling of the oil pipe is higher than the height of the pipeline to be laid and the height of the guardrail of the pipeline to be laid (generally, the height of the pipeline guardrail is 0.5 meters).

[0013] If the design depth of the support column requires two oil pipes, you need to continue to hit the protective head until the lower edge of the oil pipe female threaded coupling is close to the upper edge of the centralizer but greater than the length of the centralizer. Stop hitting, take out the centralizer, remove the protective head, tighten the protective head on the second oil pipe female threaded coupling, lift the second oil pipe, insert the second oil pipe male thread into the first oil pipe female threaded coupling that has been driven into the ground and tighten it, use a hammer to hit the protective head body on the second oil pipe, and carefully drive the first oil pipe female threaded coupling into the pile form riser, and then continue hitting. When the upper edge of the first oil pipe female threaded coupling is in the pile form riser and the distance from the upper edge of the pile form riser is greater than the length of the centralizer, put the centralizer into this pile form riser again and continue hitting until the upper edge of the second oil pipe female threaded coupling is higher than the height of the pipeline to be laid and the guardrail height of the pipeline to be laid. Stop hitting.

[0014] If the design depth of the support column requires multiple oil pipes, continue to drive the third and fourth oil pipes in the same way as the second oil pipe, and so on until the last one. Stop driving when the height of the upper edge of the oil pipe female threaded coupling is higher than the height of the pipeline to be laid and the height of the guardrail of the pipeline to be laid. The oil pipe pile is driven.

[0015] Use the same method to drive tubing piles of designed depth into the rest of the pile mold risers. Finally, use a crane to lift the pile driving mold upwards. The production of a set of tubing piles required for the bracket is completed. Use this set of tubing piles driven in this way as the bracket columns.

[0016] Place the correction frame of the column correction fixture between the columns of the bracket. Each column correction column of the correction frame will be close to one column of the bracket. The adjacent columns and column correction columns are clamped and fastened in the same plane and close together by the clamping bar and U-shaped clip. At the same time, all the cross braces of the correction frame are adjusted to keep them horizontal. Each column of the bracket is corrected from a certain degree of deviation to the designed verticality and center spacing, and the bracket columns are fixed. The bracket is welded according to the designed bracket structure. When the bracket is welded, the U-shaped clip and the clamping bar are removed, the correction frame is removed, and the remaining welding work is completed to complete the bracket welding.

[0017] If the trench is wide and requires two or more supports, place the pile mold in the second, third, and so on position where supports are needed. Use the same method as above to drive the oil pipe piles and weld the supports. Once all the supports are made, you can lay the pipeline on top of them.

[0018] The beneficial effects of the present invention are that the manufactured bracket can be inserted into the bottom of the pit or ditch to a deeper designed depth. The bracket is regular and can ensure that each column of the bracket is strictly perpendicular to the ground and the center spacing of the columns is the same as the designed center spacing of the columns. The bracket will not sink or tilt, and can be well used in pits and ditches with large water flow and wind and wave impacts. At the same time, since the same piling mold and supporting tools are used to make the bracket columns, and the same column correction fixture is used to correct the verticality and center spacing of the columns, it can ensure that all bracket structures are exactly the same, which is convenient for welding construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and examples.

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of a rectangular piling mold with six pile mold risers, which is manufactured by using scrapped oil pipes with an outer diameter of 89 mm to form a six-column rectangular support, when no iron platform for people to stand on is welded to the upper horizontal brace and the upper diagonal brace.

[0021] Figure 2 This is a three-dimensional structural diagram of an embodiment of a rectangular piling mold with six pile mold risers, which is made by using scrapped oil pipes with an outer diameter of 89 mm to make a six-column rectangular support. The mold shows an upper horizontal brace and an upper diagonal brace with an iron platform for people to stand on welded to the platform.

[0022] Figure 3It is cooperation Figure 2 A three-dimensional diagram of the structure of the two halves of the centralizer used in the pile driving mold shown are separated.

[0023] Figure 4 It is cooperation Figure 2 The three-dimensional structure diagram of the two halves of the centralizer used in the pile driving mold shown is put together.

[0024] Figure 5 It is cooperation Figure 2 The three-dimensional structure diagram of the guide pile used in the pile driving mold shown.

[0025] Figure 6 and Figure 7 It is cooperation Figure 2 The three-dimensional structure diagram of the protective head used in the pile driving mold shown is shown in different perspectives.

[0026] Figure 8 This is a stereoscopic diagram of an oil pipe with an outer diameter of 89 mm, which is commonly used in oil fields.

[0027] Figure 9 It is cooperation Figure 2 The protective head male threads used in the pile driving mold shown are all screwed in Figure 8 The three-dimensional structure diagram of the oil pipe female thread coupling when it is tightened.

[0028] Figure 10 yes Figure 2 The pile driving mold embodiment shown is placed in the first pile mold riser. Figure 4 The local three-dimensional structure diagram of the centralizer is shown.

[0029] Figure 11 yes Figure 2 The pile driving mold embodiment shown is placed in the first pile mold riser. Figure 5 After the guide pile is shown, it is placed Figure 4 A partial three-dimensional structural diagram of the centralizer shown and the guide pile driven into the ground to make the guide hole.

[0030] Figure 12 yes Figure 2 The pile driving mold embodiment shown is placed in the first pile mold standpipe. Figure 4 After the centralizer shown, the first Figure 9 Tighten the scrap oil pipe of the protective head and drop it to Figure 11 A partial three-dimensional structural diagram of the first oil pipe pile being manufactured by driving it downward into the guide hole as shown.

[0031] Figure 13 yes Figure 2 The pile driving mold embodiment shown is Figure 12The figure shows the partial three-dimensional structure of the first tubing pile being made. The tubing is driven into the position where the distance from the lower edge of the box coupling to the upper edge of the pile formwork riser is slightly greater than the length of the centralizer. The centralizer and the protective head are removed.

[0032] Figure 14 yes Figure 2 The pile driving mold embodiment shown is Figure 13 After removing the protective head, tighten the second one into the oil pipe female coupling. Figure 9 The shown diagram is a partial three-dimensional structure diagram of the tubing male buckle and the impact protection head when the first tubing box coupling is driven into the pile formwork riser.

[0033] Figure 15 yes Figure 2 In the embodiment of the pile driving mold shown, tubing piles have been driven into five pile mold risers, with only the last pile mold riser being driven into. A three-dimensional structural diagram of the pile driving mold inserted into the ground at the bottom of a pit ditch is also drawn.

[0034] Figure 16 yes Figure 2 The embodiment of the pile driving mold shown has all the oil pipe piles driven into the six pile mold risers and a three-dimensional structural diagram of the pile driving mold inserted into the ground at the bottom of the pit ditch is drawn.

[0035] Figure 17 yes Figure 2 In the embodiment of the pile driving mold shown, after all the tubing piles are driven into all the pile mold risers, the pile driving mold is lifted upward to expose all the tubing piles and a three-dimensional structural diagram of the tubing piles inserted into the ground at the bottom of the pit ditch is drawn.

[0036] Figure 18 Is used for correction Figure 2 The pile driving mold shown is made Figure 17 The three-dimensional structure diagram of a rectangular parallelepiped correction frame with six correction columns formed by a group of six support columns of oil pipe piles is shown.

[0037] Figure 19 yes Figure 18 The correction frame shown is used with the clamp bar and U-shaped clip for correction Figure 2 The pile driving mold shown is made Figure 17 The three-dimensional structure diagram of a group of 6 support columns formed by oil pipe piles is shown.

[0038] Figure 20 This is a photo of a deep-leg support for erecting an oil pipeline in a deep trench, where the support legs are made of scrapped oil pipes and inserted 25 meters underground.

[0039] In the figure: 1. Pile formwork riser, 2. Short upper cross brace, 3. Long upper cross brace, 4. Short lower cross brace, 5. Long lower cross brace, 6. Lower diagonal brace, 7. Guardrail vertical brace, 8. Short guardrail cross brace, 9. Long guardrail cross brace, 10. Upper diagonal brace, 11. Side cross diagonal brace, 12. Side herringbone diagonal brace, 13. Iron platform, 16. Centralizer handle, 17. Centralizer ear, 18. Centralizer body, 19. Guide pile tip, 20. Guide Pile body, 21. Guide pile straightening ring, 22. Guide pile lifting eye mounting hole, 23. Guide pile lifting eye, 24. Protective head guide groove, 25. Protective head body, 26. Protective head male thread, 27. Protective head body bottom edge, 28. Oil pipe female thread coupling, 29. Oil pipe body, 30. Oil pipe male thread, 291, 292, 293, 294, 295, 296. Support column, 31. Pit bottom surface. 321, 322, 323, 324, 325, 326. Column correction column, 33. Short horizontal brace for correction frame, 34. Long horizontal brace for correction frame, 35. Diagonal brace for correction frame, 36. Vertical brace for correction frame, 37. Small support, 381, 382, ​​383, 384. Clamp bar, 39. U-shaped clip. DETAILED DESCRIPTION

[0040] The present invention is further described below with reference to the accompanying drawings:

[0041] exist Figure 1 In the design, the support is a rectangular support with columns of a body having an outer diameter of 89 mm and only a thin layer of asphalt anti-corrosion layer, the center distance between the left and right outer columns is 2300 mm, the center distance between the middle column and the left and right outer columns is 1150 mm, and the center distance between the front and rear columns is also 2300 mm. The pile mold uses 6 pile mold risers (1) with an inner diameter of 121 mm, an outer diameter of 140 mm, and a length of 3.6 meters, which are placed vertically on the horizontal ground to form a rectangular structure, wherein the outer four pile mold risers (1) are the four vertical edges of the rectangular parallelepiped, and the middle two pile mold risers (1) are located between the front and rear surfaces of the rectangular parallelepiped; The positional relationship of the number and center spacing of the mold standpipes (1) is the same as the positional relationship of the number and center spacing of the designed support columns. Then, four short upper cross braces (2) and two long upper cross braces (3) are used in a plane parallel to the ground and about 1 meter below the top of the pile mold standpipes (1), and four short lower cross braces (4) and two long lower cross braces (5) are used in a plane parallel to the ground and about 0.3 meter above the ground to weld the six pile mold standpipes (1) into a rectangular structure. The short upper cross braces (2), the long upper cross braces (3), the short lower cross braces (4), the long lower cross braces (5) and the six pile mold standpipes (1) form a plurality of rectangular frames.

[0042] Furthermore, in each rectangular frame, the diagonals are respectively welded and reinforced with side cross braces (11), side herringbone braces (12), lower braces (6) and upper braces (10), so that the pile mold standpipes (1), short upper cross braces (2), long upper cross braces (3), short lower cross braces (4), long lower cross braces (5) and side cross braces (11), side herringbone braces (12), lower braces (6) and upper braces (10) form a rectangular parallelepiped pile driving mold that is firm and will not deform, and is used for driving oil pipe piles. The driven oil pipe piles are used as the designed support columns.

[0043] Further, an iron platform (13) is placed on the plane where the short upper cross brace (2), the long upper cross brace (3) and the upper diagonal brace (10) are located and welded to the short upper cross brace (2), the long upper cross brace (3) and the upper diagonal brace (10), as shown in FIG. Figure 2 As shown, it is convenient for people to stand and work on the iron plate platform (13). Four guardrail vertical supports (7), four guardrail short cross supports (8) and four guardrail long cross supports (9) are welded between the six pile form risers (1) on the upper part of the iron plate platform (13) to form a guardrail, which makes it safe and reliable for people to stand and work on the iron plate platform (13).

[0044] exist Figure 3 In the embodiment, the centralizer as the supporting tool of the pile driving mold is composed of a centralizer handle (16), a centralizer hanging ear (17) and a centralizer body (18) welded together; the centralizer includes two halves, the left and right halves, which are connected together as shown in FIG. Figure 4 As shown, the inner diameter of the centralizer body is 93 mm, the outer diameter is 119 mm, the length is 200 mm, the outer diameter of the centralizer hanging ear is 140 mm, the inner diameter of the centralizer hanging ear is 93 mm, and the thickness of the centralizer hanging ear is 25 mm; when the centralizer is inserted into the pile mold riser (1) of the pile driving mold and the centralizer hanging ear (17) is hung on the upper edge of the pile mold riser (1), Figure 10 As shown, the function of the centralizer is to allow both the guide pile and the tubing pile to be located in the center of the pile form riser (1).

[0045] exist Figure 5 In the embodiment, the guide pile of the pile driving mold supporting tool is composed of a guide pile tip (19), a guide pile body (20), a guide pile straightening ring (21) and a guide pile lifting ring (23). The guide pile lifting ring (23) is made by wearing a steel wire rope with a diameter of 12 mm in the guide pile lifting ring mounting hole (22). It is convenient for a lifting device to hang the guide pile lifting ring (23) to lift the guide pile. The length from the guide pile straightening ring (21) to the guide pile tip (19) is 2.0 meters, and the length from the guide pile straightening ring (21) to the guide pile lifting ring mounting hole (22) is 3.6 meters. The outer diameter of the guide pile straightening ring (21) is 118 mm, the length of the guide pile straightening ring (21) is 145 mm, the outer diameter of the guide pile body (20) is 89 mm, and the length of the guide pile tip is 311 mm.

[0046] exist Figure 6 and Figure 7 In the embodiment, the protective head of the piling mold supporting tool is composed of a protective head guide circular groove (24), a protective head body (25) and a protective head male thread (26) welded together or formed in one piece on a round steel lathe; and ensure that the protective head male thread (26) is in contact with the Figure 8 When the oil pipe female threaded coupling (28) is tightened, the lower edge (27) of the protective head body can be pressed together with the upper edge of the oil pipe female threaded coupling (28). Figure 9 The function of the guide groove (24) is to make it easier for the hammer to enter the protective head body (25) for striking. The thread type of the protective head male thread (26) is Figure 8 The threaded type of the shown oil pipe male threaded buckle (30) has an outer diameter of 110 mm and a length of 100 mm for the protective head body.

[0047] exist Figure 18 In the embodiment, the correction frame of the column correction fixture is composed of column correction columns (321), (322), (323), (324), (325), (326), a correction frame short cross brace (33), a correction frame long cross brace (34), a correction frame oblique brace (35) and a correction frame vertical brace (36); wherein the center points of each end of the column correction columns (321), (322), (325) and (326) are 8 points in total, which are 8 vertices of a rectangular parallelepiped; the upper and lower endpoints of the middle column correction column (323) are respectively located at the midpoint of the line connecting the upper and lower endpoints of the column correction columns (321) and (325); the upper and lower endpoints of the middle column correction column (324) are respectively located at the midpoint of the line connecting the upper and lower endpoints of the column correction columns (322) and (326); the outer diameters of the six column correction columns (321), (322), (323), (324), (325) and (326) are all the same as Figure 8 The outer diameter of the oil pipe body (29) is shown Figure 17 The outer diameters of the driven oil pipe piles, i.e., the support columns (291), (292), (293), (294), (295), and (296) are the same, all being 89 mm, and are used to calibrate the six columns (291), (292), (293), (294), (295), and (296) of the support respectively; the center distances between the left column calibration column (321) and the middle column calibration column (323), the left column calibration column (322) and the middle column calibration column (324), the middle column calibration column (323) and the right column calibration column (325), and the middle column calibration column (324) and the right column calibration column (326) are respectively 89 mm. Figure 17The center spacings between the left column (291) and the middle column (293), the left column (292) and the middle column (294), the middle column (293) and the right column (295), and the middle column (294) and the right column (296) of the oil pipe pile shown in the drive are all 1150 mm; the center spacings between the front column correction column (322) and the rear column correction column (321), the front column correction column (324) and the rear column correction column (323), and the front column correction column (326) and the rear column correction column (325) are all Figure 17 The oil pipe pile of showing driving is that the center spacing 2300 millimeters of design between the support front side column (292) and the rear side column (291), the front side column (294) and the rear side column (293), the front side column (296) and the rear side column (295) deducts 89 millimeters of two oil pipe body outer diameters, is 2122 millimeters; 6 column correction posts are fixedly strengthened by the correction frame short cross brace (33) welded on the column correction post, the correction frame long cross brace (34), the correction frame diagonal brace (35) and the correction frame vertical brace (36) etc. to fix its positional relationship and remain unchanged, the correction frame short cross brace (33) and the correction frame long cross brace (34) are perpendicular to each other, and are all perpendicular to the column correction post; In order to place the clamp bar on both sides of the upper and lower appropriate position of each column correction post, if the place that the clamp bar can not be placed is not provided at this position, then weld small support (37), a total of 16 small supports, to place the clamp bar.

[0048] The method of driving the oil pipe pile in this embodiment is as follows: Figure 2 The pile driving mold shown is placed in the pit ditch at the position where the bracket needs to be installed, so that the iron platform (13) remains horizontal. Figure 5 The guide pile tip (19) shown is inserted downward into a pile form riser (1), falls to the ground below the pile form riser (1), and then Figure 3 The two halves of the centralizer shown are placed in the pile form riser (1) and Figure 4 As shown, align the two halves of the centralizer together. Figure 5 The guide pile shown is located at the center of the pile form riser (1) under the action of the centralizer. Figure 11 As shown in the figure, a striking hammer (a vibrating hammer of an excavator can be used) is used to strike the guide pile, and the guide pile begins to enter the ground. The striking is continued, and the guide pile continues to go deeper. When the upper ring mounting hole (22) of the guide pile approaches the centralizer, the striking of the guide pile is stopped. Then, the guide pile ring (23) is hooked with an excavator to pull out the guide pile, and the centralizer is taken out. The guide hole under the ground in the pile mold standpipe is punched out. Under the action of the centralizer and the guide pile centralizing ring (21), the guide hole is basically located at the center of the pile mold standpipe (1).

[0049] Once again Figure 3 The centralizer shown is Figure 4 The two parts shown are put together, like Figure 10 Put it into the pile formwork standpipe (1) with the guide hole just punched out. Figure 8 Screw on the oil pipe female thread coupling (28) as shown Figure 6 The protective head shown will Figure 8 The oil pipe male thread (30) shown is inserted downward into the centralizer in the pile form riser (1) and falls into the guide hole below the pile form riser (1). Figure 12 As shown, the protection head body (25) on the upper part of the oil pipe is struck by a striking hammer, and the oil pipe begins to enter the ground along the guide hole. The striking of the protection head body (25) is continued, and the oil pipe continues to go deeper until the height of the upper edge of the oil pipe female threaded coupling (28) is higher than the height of the pipeline to be laid and the height of the guardrail of the pipeline to be laid (the guardrail height of 0.5 meters in this embodiment can be sufficient). The striking is stopped.

[0050] If the designed depth of the tubing pile of the support requires 2 tubings, it is necessary to continue to strike the protective head body (25) until the lower edge of the female threaded coupling (28) on the upper part of the tubing is close to the upper edge of the centralizer but is greater than 200 mm of the centralizer length. Stop striking, take out the centralizer, and remove the protective head. Figure 13 As shown; tighten the protective head on the second oil pipe female thread coupling (28), insert the second oil pipe male thread (30) into the first oil pipe female thread coupling (28) that has been driven into the ground and tighten it, then hit the protective head body (25) tightened on the second oil pipe female thread coupling, and carefully drive the first oil pipe female thread coupling (28) into the pile mold riser (1), as shown Figure 14 As shown, the hammering is continued until the upper edge of the first oil pipe female threaded coupling (28) is lowered in the pile form riser (1) to a distance greater than the length of the centralizer from the upper edge of the pile form riser (1), the centralizer is placed into the pile form riser again, and the hammering is continued until the upper edge of the second oil pipe female threaded coupling (28) is higher than the height of the pipeline to be laid and the height of the pipeline guardrail to be laid, and the hammering is stopped.

[0051] If the designed depth of the support column requires multiple oil pipes, the method of driving the second oil pipe is used to continue driving the third and fourth oil pipes, and so on until the last oil pipe is driven. When the height of the upper edge of the oil pipe female threaded coupling (28) is higher than the height of the pipeline to be laid and the height of the pipeline guardrail to be laid, the driving of the oil pipe pile is stopped, and the driving of the oil pipe pile is completed.

[0052] Use the same method to drive all the oil pipe piles of the designed depth into the other 5 pile mold risers (1) of the pile driving mold. When the last one is almost finished, Figure 15 As shown, when all are completed Figure 16As shown, the piling mold is finally lifted upward by a crane, and the six columns (291), (292), (293), (294), (295), and (296) for making the bracket are completed. Figure 17 Then, the six columns (291), (292), (293), (294), (295), (296) of the bracket are corrected for verticality and center spacing using a column correction fixture, as shown. Figure 19 shown.

[0053] exist Figure 19In the embodiment, the verticality and center distance of the columns are corrected by using a column correction fixture as follows: the correction frame of the column correction fixture is placed between the columns (291), (292), (293), (294), (295), and (296) of the manufactured bracket, so that each column of the correction frame is close to the corresponding column of the bracket (not completely close together, because a group of columns of a bracket may have different degrees of inclination or offset). First, a clamping bar (382) is placed on the small support (37) on the right side of the lower part of the column correction columns (325) and (326), and the clamping bar (382) is placed on the lower part of the column correction columns (325) and (326). A clamping bar (381) is placed on the short horizontal support (33) of the left correction frame, and then the clamping bars (381) and (382) are clamped on both sides of the column correction column (325) and the adjacent support column (295) with a U-shaped clamp (39), and then the clamping bars (381) and (382) are clamped on both sides of the column correction column (326) and the adjacent support column (296) with a U-shaped clamp (39), and the U-shaped clamp screws are tightened to press the clamping bars (381) and (382), thereby pressing the column correction column (325) and the adjacent support column (295) and the column correction column (326) and the adjacent support column. A clamping bar (384) is placed on the small support (37) on the right side of the upper part of the column correction column (325) and (326), and a clamping bar (383) is placed on the small support (37) on the left side of the upper part of the column correction column (325) and (326). Four U-shaped clips are used to clamp the clamping bars (383) and (384) on both sides of the column correction column (325) and the adjacent bracket column (295) and the column correction column (326) and the adjacent bracket column (296). The U-shaped clip screws are tightened to tighten the clamping bars (383) and (384), thereby tightening the column correction column (325) and the adjacent bracket column (296). The support column (295) and the column correction column (326) and the support column (296) close to each other are compressed in this way. The support columns (295) and (296) are in the same plane as the column correction columns (325) and (326). Then, the column correction column (326) and the support column (296) are clamped with a U-shaped clip (39) so that the column correction column (326) and the support column (296) are completely close together. Then, the column correction column (325) and the support column (295) are clamped with a U-shaped clip so that the column correction column (325) and the support column (295) are completely close together.Slightly loosen all the U-shaped clamp screws that hold the column correction column (325) and the bracket column (295), but make the column correction column (325) and the bracket column (295) still in the same plane and still stick together, just able to slide slightly, adjust the correction frame long cross brace (34) between the column correction columns (325) and (326) so that the correction frame long cross brace (34) is in a horizontal state, and then tighten the screws that were just slightly loosened again so that the column correction column (325) and the bracket column (295) can no longer slide, but are fixed like the column correction column (326) and the bracket column (296); then adjust the correction frame The short cross brace (33) is in a horizontal state, and the bracket columns (291) and (292) are clamped by the clamping bar and the U-shaped clip, so that the bracket columns (291) and (292) and the column correction columns (321) and (322) are in the same plane, and the column correction column (321) and the bracket column (291), the column correction column (322) and the bracket column (292) are completely close together; the bracket columns (293) and (294) and the column correction columns (323) and (324) are in the same plane, and the column correction column (323) and the bracket column (293), the column correction column (324) and the bracket column (294) are completely close together. After the above correction of the verticality and center spacing of the columns, it is ensured that the verticality, center spacing and other positional relationships of the bracket columns are exactly the same as the designed bracket and are fixed. Then the bracket is welded according to the designed bracket structure. First, welding can make the bracket formed as early as possible so that the bracket columns can be fixed and will not affect the correction frame to move out the horizontal braces and diagonal braces and other supports of the bracket. After welding, all U-shaped clips and clamps are removed, the correction frame is removed, and then the unwelded horizontal braces and diagonal braces and other supports are further welded to achieve the design goal. The bracket is then completed.

[0054] If the span of the pit ditch is large, two or more supports are required. Place the pile driving mold in the second, third, and so on. Use the same method to make supports at all locations where supports are required.

[0055] It should be noted that no matter what the designed support structure is, as long as the position relationship of the number of support columns and center spacing is the same as that in the embodiment and the Figure 8 The oil pipe piles driven by the oil pipes shown in the embodiment can be used as support columns. The oil pipe piles can be driven using the method shown in the embodiment using this set of pile driving molds and mold matching tools. The oil pipe piles driven by this method are used as support columns. The verticality and center spacing of the columns are corrected and fixed using the set of column correction fixtures in the embodiment, and then the brackets are welded according to the designed bracket structure.

[0056] It should also be noted that in this embodiment, a scrapped oil pipe with an outer diameter of 89 mm and only a thin layer of asphalt anti-corrosion coating on the outer wall is used as the support column. The center distance between the left and right outer columns is 2300 mm, the center distance between the middle column and the left and right outer columns is 1150 mm, and the center distance between the front and rear columns is also 2300 mm. The piling mold, mold supporting tools, and column correction fixture are manufactured. If the scrapped oil pipe has an anti-corrosion layer of a certain thickness on the outer layer, the thickness of the anti-corrosion layer should also be calculated in the outer diameter of the oil pipe. If the above data changes, the piling mold, mold supporting tools, and column correction fixture need to be remade with the corresponding data according to the specification. This embodiment is only used to illustrate the technical solution of the present invention and does not limit these data. It is only a detailed description of the present invention using a preferred embodiment. Those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be covered by the scope of the claims of the present invention. For example, the technical solution of the present invention can be used to make a support for other purposes using other metal pipes.

Claims

1. A method for making a bracket using scrapped oil pipes, characterized by: The following steps are involved: Step 1: According to the diameter, number and center spacing of the scrapped oil pipes used in the designed support columns, a pile driving mold, mold supporting tools and a column correction fixture for correcting the verticality and center spacing of the columns are manufactured; Step 2: Use the prepared pile driving mold and mold supporting tools to use scrap oil pipes to drive oil pipe piles, and use the group of oil pipe piles driven in this way as a group of columns of a bracket; Step 3: Use the column correction fixture to correct the verticality and center distance of this group of columns of the bracket and fix them in place. Then, weld the reinforcement braces and the support for placing pipelines to this group of fixed columns according to the designed bracket structure to make the bracket; The pile driving mold produced in the step 1 is composed of a pile mold standpipe, a platform, a guardrail, a horizontal brace and an oblique brace. The inner diameter of the pile mold standpipe is slightly thicker than the outer diameter of the scrapped oil pipe female threaded coupling used for the support column. The number and center spacing of the pile mold standpipe are the same as the number and center spacing of the designed support columns. The pile mold standpipe is fixed by welding the horizontal braces and oblique braces on the pile mold standpipe to keep its positional relationship unchanged. The platform is placed on the upper horizontal brace and the upper oblique brace, 1 meter below the top of the pile mold standpipe. The guardrail is located above the platform, 1 meter high, and is welded by the pile mold standpipe, the guardrail horizontal brace and the guardrail vertical brace on the platform. The mold supporting tools include a centralizer, a guide pile And protection head, the guide pile is composed of a guide pile tip, a guide pile body, a guide pile straightening ring and a guide pile lifting ring, the protection head is composed of a protection head guide circular groove, a protection head body and a protection head male thread welded together or round steel is formed in one piece on a lathe, and ensure that when the protection head male thread and the oil pipe female thread coupling are tightened, the lower edge of the protection head body can be pressed tightly together with the upper edge of the oil pipe female thread coupling; the column correction fixture is composed of a correction frame, a clamping bar and a U-shaped clip; the correction frame is composed of a column correction column, a horizontal brace, an oblique brace and a vertical brace, all of the horizontal braces are perpendicular to the column correction column, the outer diameter of the column correction column is the same as the outer diameter of the bracket column, and the number of roots is the same as the designed bracket. The number of columns is the same, and the center spacing of the column correction columns is determined by geometric calculation based on the principle that the columns and column correction columns close to each other are in the same plane and close together when the clamping bar and U-shaped clip are clamped, and the center spacing of the bracket columns is exactly the same as the designed bracket. The column correction columns are fixed by horizontal braces, diagonal braces, and vertical braces to keep their positional relationship unchanged. Small supports for clamping bars are welded at appropriate and necessary positions above and below the column correction columns; in step 2, the method of driving the oil pipe pile is: place the pile mold at the position where the bracket needs to be installed and keep the platform level, insert the guide pile tip downward into a pile mold standpipe and drop it to the ground below Place the two halves of the centralizer in the pile form riser respectively, and use a hammer to drive the guide pile into the ground. When the guide pile lifting ring drops close to the centralizer, pull out the guide pile and the centralizer, and the guide hole is completed; put the centralizer back into the pile form riser with the guide hole just drilled, screw a female threaded coupling of oil pipe on the protective head, and insert it into the centralizer in the pile form riser with the male thread facing downwards, and drop it into the guide hole below. Use a hammer to hit the protective head body on the oil pipe until the upper edge of the female threaded coupling of oil pipe is higher than the height of the pipeline to be laid and the height of the guardrail of the pipeline to be laid. Stop hitting;If the design depth of the support column requires two oil pipes, continue to hit the protective head until the lower edge of the oil pipe female threaded coupling is close to the upper edge of the stabilizer but greater than the length of the stabilizer, take out the stabilizer, remove the protective head, tighten the protective head on the second oil pipe female threaded coupling, insert the second oil pipe male thread into the first oil pipe female threaded coupling and tighten it, use a hammer to hit the protective head body above the second oil pipe. When the upper edge of the first oil pipe female threaded coupling enters the pile form riser and goes down to a distance from the upper edge of the pile form riser greater than the length of the centralizer, put the centralizer into the pile form riser again and continue to hit. The hitting stop position is the same as when hitting the first oil pipe; if the design depth of the support column requires multiple oil pipes, continue to hit the third and fourth pipes in the same way as the second pipe, and so on until the last pipe is hit to the height of the upper edge of the oil pipe female threaded coupling. When the height of the pipe is higher than the height of the guardrail of the pipe to be laid, stop striking and remove the protective head; use the same method to drive all the oil pipe piles of the designed depth into the other pile mold risers of the pile driving mold, then lift the pile driving mold upwards, and the production of a group of oil pipe piles of the support, i.e., the support columns, is completed; in step three, the verticality and center spacing of this group of columns of the support are corrected using the column correction fixture. The correction method is as follows: the correction frame of the column correction fixture is placed between the columns of the support, and each column correction column of the correction frame will be close to one column of the support. The adjacent columns and column correction columns are clamped and fastened in the same plane and close together by the clamp bar and U-shaped clip. At the same time, all the cross braces of the correction frame are adjusted to keep them horizontal. Each column of the support is corrected from a certain degree of deviation to the designed verticality and center spacing, and the support columns are fixed.

2. The method for manufacturing a bracket using scrapped oil pipes according to claim 1, characterized in that: The piling mould in step one adopts 6 steel pipes with an inner diameter of 121 mm, an outer diameter of 140 mm and a length of 3.6 m as pile mould risers, which are placed vertically on the horizontal ground and arranged into a rectangular structure, wherein the four pile mould risers on the outside are the 4 vertical edges of the rectangular parallelepiped, and the center spacing is 2300 mm. The two middle pile mould risers are located in the middle of the front and rear faces of the rectangular parallelepiped, and the center spacing with the outer pile mould risers is 1150 mm; with 4 short upper cross braces and 2 long upper cross braces parallel to the ground and in the plane where the position 1 m below the top of the pile mould riser is located, these 6 pile mould risers are welded together with 4 short lower cross braces and 2 long lower cross braces in the plane where the position 0.3 m above the ground is located, and the positional relationship of these 6 pile mould risers is fixed to ensure The short upper horizontal braces, long upper horizontal braces, short lower horizontal braces, long lower horizontal braces and 6 pile form risers form a plurality of rectangular frames, and in each rectangular frame, the diagonals are welded and reinforced with side cross braces, side herringbone braces, lower braces and upper diagonal braces, so that the pile form risers, short upper horizontal braces, long upper horizontal braces, short lower horizontal braces, long lower horizontal braces and side cross braces, side herringbone braces, lower braces and upper diagonal braces form a firm and non-deformable rectangular piling mold; an iron platform is placed on the plane where the short upper horizontal brace, long upper horizontal brace and upper diagonal brace are located and welded to the short upper horizontal brace, long upper horizontal brace and upper diagonal brace; 4 guardrail vertical braces, 4 guardrail short horizontal braces and 4 guardrail long horizontal braces are welded between the 6 pile form risers on the upper part of the iron platform to form a guardrail.

3. The method for manufacturing a bracket using scrapped oil pipes according to claim 1, characterized in that: In step one, the centralizer is composed of a centralizer handle, a centralizer lug and a centralizer body welded together, and is divided into two halves, left and right. When put together, the inner diameter of the centralizer is 93 mm, the outer diameter of the centralizer body is 119 mm, and the outer diameter of the centralizer lug is 140 mm; the guide pile lifting ring is a 12 mm diameter steel wire rope that is inserted into the guide pile lifting ring mounting hole. The length from the guide pile centralizing ring to the guide pile tip is 2.0 meters, and the length from the guide pile centralizing ring to the guide pile lifting ring mounting hole is 3.6 meters. The outer diameter of the guide pile centralizing ring is 118 mm, the outer diameter of the guide pile body is 89 mm, and the guide pile tip length is 311 mm.

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