CN110814631B - Pipeline elbow assembling and fixing device and assembling and welding method - Google Patents
Pipeline elbow assembling and fixing device and assembling and welding method Download PDFInfo
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- CN110814631B CN110814631B CN201911059989.2A CN201911059989A CN110814631B CN 110814631 B CN110814631 B CN 110814631B CN 201911059989 A CN201911059989 A CN 201911059989A CN 110814631 B CN110814631 B CN 110814631B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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Abstract
The invention relates to the technical field of mechanical equipment installation and construction, in particular to a pipeline elbow assembly fixing device and an assembly welding method, wherein a straight pipeline and an elbow to be assembled and welded are respectively supported and positioned by a pipeline fixing seat and an elbow fixing seat to keep the straight pipeline and the elbow in a correct assembly state, the out-of-roundness of the straight pipeline is corrected before assembly, and the pipe end is flattened and beveled, compared with the prior art, the pipeline elbow assembly fixing device has the following advantages: 1) the structure is simple, and the device is particularly suitable for assembly welding construction of pipelines and elbows with the diameter of 159-426 mm in narrow space on site. 2) The front and back positions of the pipeline can be adjusted, the pipeline can be moved back and forth according to the deformation condition of the pipeline to be assembled and welded, and the pipeline clamp is used for correcting the shape, so that the diameter deviation is reduced. 3) The device has the functions of flat head grinding and groove grinding, improves the installation precision, the working efficiency and the pipeline construction quality of integral assembly welding, and is suitable for the installation construction operation of various industrial kilns and chemical equipment.
Description
Technical Field
The invention relates to the technical field of mechanical equipment installation and construction, in particular to a pipeline elbow assembly fixing device and an assembly welding method.
Background
In the mechanical equipment transformation project, the construction amount of pipelines is large, wherein the connection operation of a straight pipeline and a 45-degree elbow or a 90-degree elbow is very much, how to quickly assemble the pipelines and the elbows with the diameters of 159-426 mm to meet the spatial connection relation of the pipelines and the elbows, and the size defects and the shape defects of the pipelines and the elbows are corrected and repaired in the assembly process, so that the quick assembly and welding forming are realized, the excessive occupation of the field operation space is reduced, the welding seam stress is reduced, the welding part stress is uniform, and the assembly welding construction quality is improved.
The Chinese patent with application number 201110152872.6 discloses a measuring method and a special measuring device for determining the assembly and welding position of an elbow, wherein the size of a reducing telescopic rod of the measuring device for the assembly and welding position of the elbow is determined and fixed; adjusting and fixing the extension length of the measuring center rod of the elbow assembly welding position measuring device; installing two groups of elbow assembly welding position measuring devices in the pipeline; determining the elbow assembly welding connection position and welding, performing on-site actual measurement to determine the position of the constructed connection elbow assembly between the two pipe sections to the welded junction, and determining the spatial relative position of the two pipe sections, so that the axial leads of the two pipe sections are kept in the same plane after being adjusted, thereby improving the installation precision of elbow assembly welding, and improving the working efficiency and the pipeline construction quality.
Disclosure of Invention
The invention aims to provide a pipeline elbow assembly fixing device and an assembly welding method, which overcome the defects of the prior art, are suitable for assembly welding construction of pipelines and elbows with diameters of 159-426 mm in a narrow space on site, can adjust the shape and size defects of the pipelines and elbows to be assembled and welded, correct deformation, enable welding seams to be uniform, reduce welding seam stress fluctuation caused by nonuniform welding flesh, improve the assembly welding precision of the pipeline elbows, and improve the working efficiency and the pipeline construction quality.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a pipeline elbow assembly fixing device is characterized by comprising a pipeline fixing seat and an elbow fixing seat, wherein the elbow fixing seat is arranged on a track at one end of the pipeline fixing seat, and the elbow fixing seat is connected with an end stopping plate arranged at one end of the pipeline fixing seat through an adjusting device along the length direction of a pipeline;
the pipeline fixing seat is provided with three movable pipeline clamps along the length direction of the steel pipe, each movable pipeline clamp comprises a clamp body and a driving device, a working arc surface is arranged on each clamp body and faces the pipeline direction, the diameter of each working arc surface is 450-500 mm, the bottom of each working arc surface is horizontally tangent to the upper surface of the pipeline fixing seat, the working arc surfaces of the movable pipeline clamp in the middle and the other two movable pipeline clamps face opposite directions, each clamp body is arranged in a sliding groove perpendicular to the pipeline direction on the pipeline fixing seat, and the clamp bodies are connected with limiting frames arranged on the side edges of the pipeline fixing seat through the driving devices;
the bottom of the pipeline fixing seat is provided with two groups of rolling brackets, the rolling brackets are arranged along the length direction of the steel pipe, at least one group of rolling brackets comprises a hydraulic lifting seat, an offset screw, a universal nut, a radial bearing seat, a bracket shaft, a carrier roller and a carrier roller motor, the front and the back of the hydraulic lifting seat are respectively provided with one offset screw, the universal nut structure comprises a nut block and a thrust bearing, the nut block is meshed with the offset screw, the upper surface of the nut block is connected with a lower ring of the thrust bearing, an upper ring of the thrust bearing is connected with a cover plate, the cover plate is provided with the radial bearing seat, two ends of the bracket shaft are respectively connected with the radial bearing seat, the carrier roller is arranged;
the elbow fixing seat comprises a flat seat body, a vertical seat body, a straightening roller assembly and a lifting roller assembly, wherein the vertical seat body is vertically arranged on the flat seat body, the vertical seat body is provided with a 180-degree cylindrical positioning surface towards the pipeline direction, the diameter of the positioning surface is 450-500 mm, the flat seat body is provided with a group of straightening roller assemblies, each straightening roller assembly comprises a hydraulic pedestal, a bearing seat, a carrier roller shaft and a straightening roller, the hydraulic pedestal is provided with two carrier roller shafts in parallel, the carrier roller shafts are connected with the hydraulic pedestal through the bearing seats, the straightening rollers are arranged on the carrier roller shafts, and one end of each carrier roller shaft is connected with a straightening; the lifting roller assembly is arranged on the vertical base body and comprises a lifting roller and a lifting roller shaft, the lifting roller is arranged on the lifting roller shaft and is connected with the vertical base body through a bearing seat, the lifting roller is in a middle concave roller shape, and a rubber layer is arranged on the surface of the roller.
The cross section of the track is a rectangular groove, a T-shaped groove or a dovetail groove.
The adjusting device is any one of a hydraulic cylinder, an electric push rod or a manual crank.
The driving device is any one of a hydraulic cylinder, an electric push rod or a manual crank.
A movable grinding wheel machine is arranged on one side of the pipeline fixing seat and comprises a grinding wheel machine and a movable frame, the grinding wheel machine is movably connected with a guide rail on the movable frame, the guide rail comprises a radial section vertical to the length direction of the pipeline and an oblique section forming an angle of 45 degrees with the length direction of the pipeline, an intersection point is arranged between the radial section and the oblique section, and the guide rail is a T-shaped groove rail; the grinding machine comprises a base, a motor and a grinding wheel, the motor is arranged on the base, the shaft end of the motor is connected with the grinding wheel, a safety cover plate is arranged above the grinding wheel, and the base is connected with the guide rail through a T-shaped bolt.
The pipeline elbow assembly welding method is characterized in that a straight pipeline and an elbow to be assembled and welded are respectively supported and positioned through a pipeline fixing seat and an elbow fixing seat to keep the straight pipeline and the elbow in a correct assembly state, out-of-roundness of the straight pipeline is corrected before assembly, flat heads and grooves are formed in pipe ends, the final welding seam is uniform in width, and the method comprises the following specific operation steps:
1) the roundness detection is carried out, the straight pipeline is hung on two groups of rolling brackets of the pipeline fixing seat, when the axes of the carrier rollers on the two groups of rolling brackets are consistent with the length direction of the pipeline, the carrier roller motors rotate in the same direction, the pipeline rolls on the rolling brackets, and the diameter change condition of the pipeline is detected;
2) performing roundness trimming, namely adjusting an offset lead screw at the bottom of a rolling bracket to enable the axis of a carrier roller to form an included angle of 15-45 degrees with the length direction of a pipeline, enabling two carrier roller motors to rotate reversely, enabling the pipeline to move along the length direction, enabling the pipeline to stop rotating at the position where the horizontal position is at the maximum diameter value, operating movable pipeline clamps to move oppositely, clamping the pipeline, enabling the diameter of the pipeline to deform reversely, and repeating the operation for 3-5 times to enable the diameter deviation of the whole straight pipeline to be smaller than 2 mm;
3) flatting and beveling, namely moving a grinding machine along a guide rail of a radial section to enable a grinding wheel to grind the end part of a straight pipeline, rotating the straight pipeline in situ until the pipe end is flush, retreating the straight pipeline, moving the grinding machine along a guide rail of an oblique section to enable the grinding wheel to bevel a 45-degree bevel on the end part of the straight pipeline, rotating the straight pipeline in situ until the bevel is finished, and returning the grinding machine to a standby position;
4) the elbow is in place, the 45-degree or 90-degree elbow is hung on a roller bracket on an elbow fixing seat, a straightening roller is rotated to enable the elbow to be symmetrical left and right, the straightening roller stops rotating, a lifting roller is rotated, the outer arc of the elbow is moved up and down under the friction of the lifting roller, the perpendicularity of the welding port plane of the elbow is checked by a guiding rule, and when the elbow is in a vertical position, the lifting roller stops rotating;
5) and (3) performing assembly welding, namely moving the elbow fixing seat to the pipeline fixing seat along the track, and respectively adjusting the rolling bracket and the straightening roller assembly to enable the central axis of the straight pipeline to be coaxial with the central axis of the elbow until the straight pipeline is aligned with the elbow welding opening, so that the straight pipeline and the elbow can be welded together by a conventional welding method.
The linear speed of the straight pipeline rotating in situ is 1.5-3 mm/s, and the speed of the straight pipeline moving along the length direction is 0.2-2 mm/s.
Compared with the prior art, the invention has the following beneficial effects: 1) the structure is simple, the device is particularly suitable for assembly welding construction of straight pipelines and elbows with the diameter of 159-426 mm in narrow spaces on site, and the assembly fixing device has enough strength and can meet the support positioning requirements of the straight pipelines and the elbows. 2) The front and back positions of the straight pipeline can be moved, the pipeline can be moved back and forth according to the deformation condition of the straight pipeline to be assembled and welded, the diameter of the pipeline is corrected by using the three pipeline clamps, the diameter deviation is reduced, the operation is convenient, and the labor intensity is low. 3) The invention has the functions of flat head and groove grinding, can correct the welded junction of the straight pipeline before welding, ensures uniform welding seams, improves the installation precision of the integral pipeline elbow assembly welding, improves the working efficiency and the pipeline construction quality, and is suitable for the installation and construction operation of various industrial kilns and chemical equipment.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a pipe elbow group fitting and fixing device of the invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a left side view of fig. 1.
Fig. 4 is a schematic structural diagram of an embodiment of the rolling bracket of the invention.
Fig. 5 is a top view of fig. 4.
FIG. 6 is a schematic structural view of an embodiment of the leveling roller assembly of the present invention.
Figure 7 is a schematic structural view of an embodiment of the elevator roll assembly of the present invention.
In the figure: 1-pipeline fixing seat, 2-elbow fixing seat, 3-track, 4-end plate, 5-straight pipeline, 6-adjusting device, 7-movable pipeline clamp, 71-clamp body, 72-driving device, 73-working arc surface, 74-chute, 8-grinding machine, 9-moving frame, 10-guide rail, 11-elbow, 12-limiting frame, 13-rolling bracket, 131-hydraulic lifting seat, 132-deviation adjusting screw rod, 133-universal nut, 1331-thrust bearing, 1332-nut block, 1333-cover plate, 134-radial bearing seat, 135-bracket shaft, 136-carrier roller, 137-carrier roller motor, 21-seat body, 22-seat body, 23-correcting roller assembly, 231-hydraulic seat, 232-roller supporting shaft, 233-bearing seat, 234-correcting roller, 235-correcting motor, 24-lifting roller component, 241-lifting roller, 242-lifting roller shaft, 243-bearing seat and 25-positioning surface.
Detailed Description
The following examples are presented to further illustrate embodiments of the present invention:
in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, which are schematic structural views of an embodiment of a fixing device for a pipeline elbow assembly, the fixing device comprises a pipeline fixing seat 1 and an elbow fixing seat 2, the elbow fixing seat 2 is arranged on a track 3 at one end of the pipeline fixing seat 1, the elbow fixing seat 2 is connected with an end stop plate 4 arranged at one end of the pipeline fixing seat 1 along the length direction of a straight pipeline 5 through an adjusting device 6, and the adjusting device 6 is a manual crank. The adjusting device 6 is operated to enable the elbow fixing seat 2 to move back and forth relative to the pipeline fixing seat 1 along the track 3, and the elbow fixing seat is used for pairing the straight pipeline 5 and the elbow 11. Two groups of rolling brackets 13 are arranged at the bottom of the pipeline fixing seat 1 and are arranged along the length direction of the straight pipeline steel pipe. One side of the pipeline fixing seat 1 is provided with a movable grinding wheel machine which comprises a grinding wheel machine 8 and a movable frame 9, the grinding wheel machine 8 moves along a guide rail 10 on the movable frame 9, an operator operates the grinding wheel machine 8 to move along the movable frame 9, end flat heads and grooves of the straight pipeline 5 can be ground, quality defects caused in the pipeline welding or transportation process are corrected, and after the straight pipeline and the elbow are assembled, the grinding wheel machine 8 is withdrawn, and welding openings can be welded. The grinding machine 8 comprises a machine base 801, a motor 802 and a grinding wheel 803, wherein the motor 802 is arranged on the machine base 801, the shaft end of the motor 802 is connected with the grinding wheel 803, and a safety cover plate 804 is arranged above the grinding wheel 803. The guide rail 10 comprises a radial section 101 perpendicular to the length direction of the straight pipeline and an oblique section 102 forming an angle of 45 degrees with the length direction of the pipeline, an intersection point 103 is arranged between the radial section and the oblique section, the guide rail 10 is a T-shaped grooved rail, and the machine base 801 is connected with the guide rail 10 through a T-shaped bolt.
The elbow fixing seat 2 comprises a flat seat body 21, a vertical seat body 22, a straightening roller assembly 23 and a lifting roller assembly 24, wherein the vertical seat body 22 is vertically arranged on the flat seat body 21, a 180-degree cylindrical positioning surface 25 is arranged on the vertical seat body towards the pipeline direction, the diameter of the positioning surface is 500mm, the flat seat body 21 is provided with a group of straightening roller assemblies 23, and the vertical seat body 22 is provided with the lifting roller assembly 24. The rolling bracket 13 and the straightening roller assembly 23 can respectively rotate the straight pipeline 5 and the elbow 11 around the axis and adjust the straight pipeline and the elbow 11 to the proper pairing posture.
Be equipped with three movable pipeline and press from both sides 7 along steel pipe length direction on the pipeline fixing base 1, movable pipeline presss from both sides 7 including clamp 71 and drive arrangement 72, be work cambered surface 73 towards the pipeline direction on the clamp 71, work cambered surface diameter 500mm, work cambered surface bottom is tangent with pipeline fixing base 1 upper surface level, the movable pipeline that wherein is located in the middle presss from both sides the work cambered surface orientation with two other movable pipeline presss from both sides is opposite, clamp 71 locates on the pipeline fixing base in the spout 74 of perpendicular to pipeline direction, the clamp is connected through drive arrangement 72 between the spacing 12 of pipeline fixing base side with locating, drive arrangement 72 also is manual crank. When the out-of-roundness of a certain section of straight pipeline is out of tolerance, the straight pipeline can be clamped by the three movable pipeline clamps through adjusting the driving device 72, the out-of-roundness of the straight pipeline can be corrected due to the fact that stress is in the horizontal diameter direction, the corresponding diameter correction value range of the straight pipeline with the wall thickness of 5mm and the diameter of 426mm is 2-3.8 mm, the wall thickness of the straight pipeline with the wall thickness of more than 8mm is required to be pressed and driven by a hydraulic cylinder or an electric push rod, and the force of a manual crank is insufficient.
Referring to fig. 4-5, the rolling bracket structure includes a hydraulic lifting seat 131, an offset screw 132, a universal nut 133, a radial bearing seat 134, a bracket shaft 135, a carrier roller 136 and a carrier roller motor 137, the hydraulic lifting seat 131 is respectively provided with one offset screw 132 at the front and at the back, the universal nut 133 structure includes a nut block 1332 and a thrust bearing 1331, the nut block 1332 is engaged with the offset screw 132, the upper surface of the nut block 1332 is connected with the lower ring of the thrust bearing 1331, the upper ring of the thrust bearing 1331 is connected with a cover plate 1333, the cover plate is provided with the radial bearing seat 134, two ends of the bracket shaft 135 are respectively connected with the radial bearing seat 134, the carrier roller 136 is arranged in the center of the bracket shaft 135, and one end of. The two bracket shafts 135 can be switched from a parallel position to a state of forming an included angle by adjusting the offset screw 132, when the two bracket shafts 135 are parallel, the straight pipe 5 can rotate in place when the idler motor 137 rotates, and when the two bracket shafts 135 form an included angle, the straight pipe 5 can move along the axial line while rotating in place when the idler motor 137 rotates, so that the end part flat head or groove grinding and the assembly with the elbow 11 are facilitated.
Referring to fig. 6, in the structure of the straightening roller assembly, two carrier roller shafts 232 are arranged on a hydraulic pedestal 231 in parallel, the carrier roller shafts 232 are connected with the hydraulic pedestal 231 through bearing seats 233, straightening rollers 234 are arranged on the carrier roller shafts 232, one end of each carrier roller shaft 232 is connected with a straightening motor 235, the hydraulic pedestal 231 can drive the straightening rollers 234 to lift, so as to drive the elbows 11 to lift and to be paired with the straight pipe 5, and when the straightening motors 235 drive the straightening rollers 234 to rotate, the straight pipe 5 can be driven to rotate in the forward direction or the reverse direction.
Referring to fig. 7, in the structure of the lifting roller assembly, the lifting roller 241 is disposed on the lifting roller shaft 242, the lifting roller shaft 242 is connected with the vertical seat 22 through the bearing support 243, the lifting roller 241 is shaped like a medium concave roller, the surface of the roller is provided with a rubber layer, so that the surface friction is enhanced, and when an operator adjusts the posture by applying external force to the elbow, the lifting roller 241 can reduce the moving resistance of the elbow 11.
In the embodiment, the cross section of the track 3 is a rectangular groove, and a T-shaped groove or a dovetail groove can be selected. The adjusting device 6 can select a hydraulic cylinder, an electric push rod or a manual screw according to the situation. The driving device 72 may be a hydraulic cylinder, an electric push rod, or a manual screw, as the case may be.
The invention relates to a pipeline elbow assembly welding method, which is characterized in that a pipeline fixing seat 1 and an elbow fixing seat 2 are used for respectively supporting and positioning a straight pipeline 5 and an elbow 11 to be assembled and welded so as to keep the straight pipeline 5 and the elbow 11 in a correct assembly state, the out-of-roundness of the straight pipeline 5 can be corrected according to requirements before assembly, and the pipe end is subjected to flat head and beveling so as to ensure that the final welding seam is uniform in width, and the specific operation steps are as follows:
1) the roundness detection comprises the steps that a straight pipeline 5 is hung on two groups of rolling brackets 13 of a pipeline fixing seat 1, when the axes of supporting rollers on the two groups of rolling brackets 13 are consistent with the length direction of the pipeline, supporting roller motors rotate in the same direction, the straight pipeline 5 rolls on the rolling brackets 13, an operator detects the diameter change condition of the straight pipeline 5, and when the diameter is oblate, roundness correction is needed;
2) roundness trimming, namely adjusting an offset lead screw at the bottom of a rolling bracket 13 to enable the axis of a carrier roller to form an included angle of 15-45 degrees with the length direction of the pipeline, enabling two carrier roller motors to rotate reversely, enabling a straight pipeline 5 to move along the length direction, stopping rotating when the straight pipeline 5 is at the maximum diameter position of the horizontal position, operating movable pipeline clamps 7 to move oppositely to clamp the straight pipeline 5 to enable the diameter of the pipeline to deform reversely, and repeating the operation for 3-5 times to enable the diameter deviation of the whole straight pipeline 5 to be smaller than 2 mm;
3) flattening and beveling, namely moving a grinding machine 8 along a guide rail at a radial section to enable a grinding wheel to grind the end part of a straight pipeline 5, rotating the straight pipeline 5 in situ until the pipe end is flush, retreating the straight pipeline 5, moving the grinding machine 8 along a guide rail at an inclined section to enable the grinding wheel to bevel a 45-degree bevel at the end part of the straight pipeline, rotating the straight pipeline 5 in situ until the bevel is finished, and returning the grinding machine 8 to a standby position;
4) the elbow is in place, the 90-degree elbow is hung on the straightening roller on the elbow fixing seat 2, the straightening roller 23 is rotated to enable the elbow 11 to be symmetrical left and right, the straightening roller stops rotating, the lifting roller 24 is rotated, the outer arc of the elbow 11 is moved up and down under the friction of the lifting roller 24, the perpendicularity of the welding port plane of the elbow 11 is checked by using a guiding ruler, and when the elbow is in a vertical position, the lifting roller 24 stops rotating;
5) and (3) performing assembly welding, namely moving the elbow fixing seat 2 to the pipeline fixing seat 1 along the track 3, respectively adjusting the rolling bracket 13 and the straightening roller assembly 23 to enable the central axis of the straight pipeline 5 to be coaxial with the central axis of the elbow 11 until the welding openings of the straight pipeline 5 and the elbow 11 are aligned, and welding the straight pipeline 5 and the elbow 11 together according to a conventional welding method.
In the embodiment, the linear speed of the in-situ rotation of the straight pipeline 5 is 1.5-3 mm/s, and the speed of the movement of the straight pipeline 5 along the length direction is 0.2-2 mm/s.
The above embodiments are merely specific examples selected for illustrating the objects, technical solutions and advantages of the present invention in detail, and should not be construed as limiting the scope of the present invention, and various modifications, equivalent substitutions and improvements can be made without departing from the spirit and principle of the present invention.
Claims (7)
1. A pipeline elbow assembly fixing device is characterized by comprising a pipeline fixing seat and an elbow fixing seat, wherein the elbow fixing seat is arranged on a track at one end of the pipeline fixing seat, and the elbow fixing seat is connected with an end stopping plate arranged at one end of the pipeline fixing seat through an adjusting device along the length direction of a pipeline;
the pipeline fixing seat is provided with three movable pipeline clamps along the length direction of the steel pipe, each movable pipeline clamp comprises a clamp body and a driving device, a working arc surface is arranged on each clamp body and faces the pipeline direction, the diameter of each working arc surface is 450-500 mm, the bottom of each working arc surface is horizontally tangent to the upper surface of the pipeline fixing seat, the working arc surfaces of the movable pipeline clamp in the middle and the other two movable pipeline clamps face opposite directions, each clamp body is arranged in a sliding groove perpendicular to the pipeline direction on the pipeline fixing seat, and the clamp bodies are connected with limiting frames arranged on the side edges of the pipeline fixing seat through the driving devices;
the bottom of the pipeline fixing seat is provided with two groups of rolling brackets, the rolling brackets are arranged along the length direction of the steel pipe, at least one group of rolling brackets comprises a hydraulic lifting seat, an offset screw, a universal nut, a radial bearing seat, a bracket shaft, a carrier roller and a carrier roller motor, the front and the back of the hydraulic lifting seat are respectively provided with one offset screw, the universal nut structure comprises a nut block and a thrust bearing, the nut block is meshed with the offset screw, the upper surface of the nut block is connected with a lower ring of the thrust bearing, an upper ring of the thrust bearing is connected with a cover plate, the cover plate is provided with the radial bearing seat, two ends of the bracket shaft are respectively connected with the radial bearing seat, the carrier roller is arranged;
the elbow fixing seat comprises a flat seat body, a vertical seat body, a straightening roller assembly and a lifting roller assembly, wherein the vertical seat body is vertically arranged on the flat seat body, the vertical seat body is provided with a 180-degree cylindrical positioning surface towards the pipeline direction, the diameter of the positioning surface is 450-500 mm, the flat seat body is provided with a group of straightening roller assemblies, each straightening roller assembly comprises a hydraulic pedestal, a bearing seat, a carrier roller shaft and a straightening roller, the hydraulic pedestal is provided with two carrier roller shafts in parallel, the carrier roller shafts are connected with the hydraulic pedestal through the bearing seats, the straightening rollers are arranged on the carrier roller shafts, and one end of each carrier roller shaft is connected with a straightening; the lifting roller assembly is arranged on the vertical base body and comprises a lifting roller and a lifting roller shaft, the lifting roller is arranged on the lifting roller shaft and is connected with the vertical base body through a bearing seat, the lifting roller is in a middle concave roller shape, and a rubber layer is arranged on the surface of the roller.
2. The piping elbow assembly fixing device as claimed in claim 1, wherein the rail section is a rectangular groove, a T-shaped groove or a dovetail groove.
3. The piping elbow assembly fixing device of claim 1, wherein the adjusting device is any one of a hydraulic cylinder, an electric push rod or a manual crank.
4. The piping elbow assembly fixing device of claim 1, wherein the driving device is any one of a hydraulic cylinder, an electric push rod or a manual crank.
5. The pipe elbow assembling and fixing device of claim 1, wherein a moving grinder is disposed on one side of the pipe fixing seat, the moving grinder comprises a grinder and a moving frame, the grinder is movably connected with a guide rail on the moving frame, the guide rail comprises a radial section perpendicular to the length direction of the pipe and an oblique section forming an angle of 45 degrees with the length direction of the pipe, an intersection point is disposed between the radial section and the oblique section, and the guide rail is a T-shaped grooved rail; the grinding machine comprises a base, a motor and a grinding wheel, the motor is arranged on the base, the shaft end of the motor is connected with the grinding wheel, a safety cover plate is arranged above the grinding wheel, and the base is connected with the guide rail through a T-shaped bolt.
6. The pipeline elbow assembly welding method is characterized in that a straight pipeline and an elbow to be assembled and welded are respectively supported and positioned through a pipeline fixing seat and an elbow fixing seat to keep the straight pipeline and the elbow in a correct assembly state, out-of-roundness of the straight pipeline is corrected before assembly, flat heads and grooves are formed in pipe ends, the final welding seam is uniform in width, and the method comprises the following specific operation steps:
1) the roundness detection is carried out, the straight pipeline is hung on two groups of rolling brackets of the pipeline fixing seat, when the axes of the carrier rollers on the two groups of rolling brackets are consistent with the length direction of the pipeline, the carrier roller motors rotate in the same direction, the pipeline rolls on the rolling brackets, and the diameter change condition of the pipeline is detected;
2) performing roundness trimming, namely adjusting an offset lead screw at the bottom of a rolling bracket to enable the axis of a carrier roller to form an included angle of 15-45 degrees with the length direction of a pipeline, enabling two carrier roller motors to rotate reversely, enabling the pipeline to move along the length direction, enabling the pipeline to stop rotating at the position where the horizontal position is at the maximum diameter value, operating movable pipeline clamps to move oppositely, clamping the pipeline, enabling the diameter of the pipeline to deform reversely, and repeating the operation for 3-5 times to enable the diameter deviation of the whole straight pipeline to be smaller than 2 mm;
3) flatting and beveling, namely moving a grinding machine along a guide rail of a radial section to enable a grinding wheel to grind the end part of a straight pipeline, rotating the straight pipeline in situ until the pipe end is flush, retreating the straight pipeline, moving the grinding machine along a guide rail of an oblique section to enable the grinding wheel to bevel a 45-degree bevel on the end part of the straight pipeline, rotating the straight pipeline in situ until the bevel is finished, and returning the grinding machine to a standby position;
4) the elbow is in place, the 45-degree or 90-degree elbow is hung on a roller bracket on an elbow fixing seat, a straightening roller is rotated to enable the elbow to be symmetrical left and right, the straightening roller stops rotating, a lifting roller is rotated, the outer arc of the elbow is moved up and down under the friction of the lifting roller, the perpendicularity of the welding port plane of the elbow is checked by a guiding ruler, and when the elbow is in the vertical position, the lifting roller stops rotating;
5) and (3) performing assembly welding, namely moving the elbow fixing seat to the pipeline fixing seat along the track, and respectively adjusting the rolling bracket and the straightening roller assembly to enable the central axis of the straight pipeline to be coaxial with the central axis of the elbow until the straight pipeline is aligned with the elbow welding opening, so that the straight pipeline and the elbow can be welded together by a conventional welding method.
7. The method for assembling and welding the elbow of the pipeline as claimed in claim 6, wherein the linear speed of the in-situ rotation of the straight pipeline is 1.5-3 mm/s, and the speed of the movement of the straight pipeline along the length direction is 0.2-2 mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911059989.2A CN110814631B (en) | 2019-11-01 | 2019-11-01 | Pipeline elbow assembling and fixing device and assembling and welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911059989.2A CN110814631B (en) | 2019-11-01 | 2019-11-01 | Pipeline elbow assembling and fixing device and assembling and welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110814631A CN110814631A (en) | 2020-02-21 |
| CN110814631B true CN110814631B (en) | 2021-03-16 |
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| CN201911059989.2A Active CN110814631B (en) | 2019-11-01 | 2019-11-01 | Pipeline elbow assembling and fixing device and assembling and welding method |
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| JPH03221312A (en) * | 1990-01-22 | 1991-09-30 | Itsuo Takeshita | Pipe rotating device |
| WO2004065057A2 (en) * | 2003-01-20 | 2004-08-05 | Daniele Comba | Rotary chain vice |
| KR20070082293A (en) * | 2006-02-16 | 2007-08-21 | 서상인 | A rotator for a pipe welding |
| DE102008022713A1 (en) * | 2008-05-07 | 2009-12-03 | Thyssenkrupp Lasertechnik Gmbh | Welding together different lengths of pipe segments, comprises detecting lengths of individual pipe segments, which are axially placed next to each other with an end on a carrier, and discontinuously lowering the carrier with pipe segments |
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| CN205764528U (en) * | 2016-06-28 | 2016-12-07 | 江苏前山管道技术有限公司 | A kind of short sections welding center |
| CN206200479U (en) * | 2016-11-03 | 2017-05-31 | 南京奥特电气股份有限公司 | Heavy technique pipe fitting Zu Dui centers |
| CN106984930A (en) * | 2017-03-20 | 2017-07-28 | 中国能源建设集团天津电力建设有限公司 | A kind of elbow pipeline section counterpart mold |
| CN107877085A (en) * | 2017-12-16 | 2018-04-06 | 唐山金山腾宇科技有限公司 | Automatic group of pipeline is to splicing equipment |
| CN109332970A (en) * | 2018-10-09 | 2019-02-15 | 日照港船机工业有限公司 | Flanged bend meander sections automatic welding workbench and its application method |
| CN109773399A (en) * | 2019-02-28 | 2019-05-21 | 广东南海昌和模具有限公司 | The assemble welding device of special-shaped bend pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060196035A1 (en) * | 2005-03-07 | 2006-09-07 | David Opperman | Method for assembling a non-linear composite tube |
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|---|---|---|---|---|
| JPH03221312A (en) * | 1990-01-22 | 1991-09-30 | Itsuo Takeshita | Pipe rotating device |
| WO2004065057A2 (en) * | 2003-01-20 | 2004-08-05 | Daniele Comba | Rotary chain vice |
| KR20070082293A (en) * | 2006-02-16 | 2007-08-21 | 서상인 | A rotator for a pipe welding |
| DE102008022713A1 (en) * | 2008-05-07 | 2009-12-03 | Thyssenkrupp Lasertechnik Gmbh | Welding together different lengths of pipe segments, comprises detecting lengths of individual pipe segments, which are axially placed next to each other with an end on a carrier, and discontinuously lowering the carrier with pipe segments |
| CN202428147U (en) * | 2012-01-10 | 2012-09-12 | 胜利油田胜利石油化工建设有限责任公司 | Flange and connection pipe aligner for pressure container |
| CN104827237A (en) * | 2015-05-31 | 2015-08-12 | 资兴市粤兴汽车零部件制造有限公司 | Pipe end hoop welding and fixing device for automobile pipe |
| CN205764528U (en) * | 2016-06-28 | 2016-12-07 | 江苏前山管道技术有限公司 | A kind of short sections welding center |
| CN206200479U (en) * | 2016-11-03 | 2017-05-31 | 南京奥特电气股份有限公司 | Heavy technique pipe fitting Zu Dui centers |
| CN106984930A (en) * | 2017-03-20 | 2017-07-28 | 中国能源建设集团天津电力建设有限公司 | A kind of elbow pipeline section counterpart mold |
| CN107877085A (en) * | 2017-12-16 | 2018-04-06 | 唐山金山腾宇科技有限公司 | Automatic group of pipeline is to splicing equipment |
| CN109332970A (en) * | 2018-10-09 | 2019-02-15 | 日照港船机工业有限公司 | Flanged bend meander sections automatic welding workbench and its application method |
| CN109773399A (en) * | 2019-02-28 | 2019-05-21 | 广东南海昌和模具有限公司 | The assemble welding device of special-shaped bend pipe |
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| CN110814631A (en) | 2020-02-21 |
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