Large metal pipe orifice corrector and pipe orifice correction method

Abstract

The present invention discloses a pipe orifice corrector, which provides a large-scale metal pipe orifice corrector and a pipe orifice correction method with low cost, good pipe orifice correction effect, and a time-saving, labor-saving, convenient and quick correction process. It solves the technical problems in the prior art that pipe orifice correction is time-consuming and labor-intensive, easily causes insufficient correction or excessive correction, and has poor correction effect. The corrector comprises a U-shaped clip clamped inside and outside the pipe orifice of the metal pipe, the inner end of the U-shaped clip is attached to the inner side of a depression corresponding to the pipe orifice of the metal pipe, the outer end of the U-shaped clip extends to the outer side of a protrusion corresponding to the pipe orifice of the metal pipe, a lifting and clamping column is provided on the U-shaped clip corresponding to the outer side of the depression and is placed on the depression, and a push rod is provided on the U-shaped clip corresponding to the outer side of the protrusion and can be placed downward on the protrusion.

Description

Technical Field

[0001] The present invention relates to a pipe orifice corrector, and in particular to a large-scale metal pipe orifice corrector and a pipe orifice correction method, which is time-saving, labor-saving, convenient, fast, low-cost and has good correction effect. Background Art

[0002] With the continuous advancement of technology, the assembly quality requirements for large metal pipelines such as oil and gas pipelines are becoming increasingly higher, which places higher demands on pipe production and on-site construction. However, pipe deformation is inevitable during the production, transportation, stacking and bending processes of pipes. As a result, the two pipe ends are misaligned when they are butt-jointed and assembled, thus failing to meet construction requirements. The existing solution is to use a jack to correct the deformed pipe ends. First, the correction process is time-consuming and labor-intensive, and is very likely to cause safety accidents. Second, because the jack is difficult to control during use, it is very easy to under-correct or over-correct, resulting in poor correction effect. When the pipe end is over-corrected, it is very easy to damage the pipe end, which can directly lead to pipeline scrapping and material waste. Summary of the Invention

[0003] The present invention mainly provides a large-scale metal pipe orifice corrector and a pipe orifice correction method, which are time-saving, labor-saving, convenient, fast, low-cost and have good correction effects. It solves the technical problems in the prior art that pipe orifice correction is time-consuming and labor-intensive, and is very likely to cause insufficient or excessive correction during correction, resulting in poor correction effects.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions: a large metal pipe nozzle corrector, including a U-shaped clamp clamped inside and outside the recess of the metal pipe nozzle, a pressure rod is horizontally provided on the U-shaped clamp corresponding to the outside of the metal pipe nozzle, and the two ends of the pressure rod extend to the protrusions of the metal pipe nozzle corresponding to both sides of the recess, and the pressure rod is provided with a lifting push rod that can push the protrusion downward. The U-shaped clamp is clamped inside and outside the recessed part of the pipe mouth of the deformed metal pipe, and a pressure rod is horizontally arranged on the outside of the U-shaped clamp, and the two ends of the pressure rod are respectively located above the protrusions on both sides of the recessed part. The pressure rod is provided with a lifting push rod which is placed on the protrusion. During correction, according to the principle of action and reaction force, the lifting push rod pushes the protrusion downward while the U-shaped clamp pulls the recessed part upward at the same time, thereby realizing synchronous correction of the protrusion and the recessed part, saving time and effort, and being convenient and quick. Since the forces acting on the protrusion and the recessed part are the same, insufficient or excessive correction will not occur, the pipe mouth correction effect is good, the overall structure is simple, the production and correction costs are low, and it is easy to carry and use.

[0005] Preferably, a lifting and pressing column that can be placed on the depression is provided on the U-shaped clamp corresponding to the outside of the metal pipe nozzle. By providing the lifting and pressing column, the U-shaped clamp can be clamped and fixed on the metal pipe nozzle to prevent the lifting push rod from slipping during the correction process.

[0006] Preferably, the U-shaped chuck includes an L-shaped base clamp, the transverse edge of which extends horizontally into the metal pipe opening, and the longitudinal edge of which extends radially outward from the metal pipe opening. A pressure plate is slidably inserted into the longitudinal edge of the L-shaped base clamp, and the pressure plate is slidably inserted into the middle of the pressure rod. The U-shaped chuck adopts a split structure, which is easy to assemble and disassemble. The pressure plate is slidably inserted into the middle of the pressure rod, which not only facilitates the axial position adjustment of the pressure rod, but also balances the stress state on the left and right sides to ensure the correction effect.

[0007] More preferably, the longitudinal side of the L-shaped bottom clamp is provided with a plurality of socket holes that match the pressure plate, and the socket holes are arranged along the longitudinal direction of the L-shaped bottom clamp. By changing the socket holes, the position of the pressure plate can be adjusted to meet the correction requirements of different deformed pipe openings.

[0008] Preferably, a plurality of lifting push rods are provided on the pressure rod corresponding to the protrusion. By providing a plurality of lifting push rods, multi-point correction can be achieved by one positioning, thereby improving correction efficiency.

[0009] Preferably, a correction pressure plate is provided between the lifting push rod and the protrusion. The correction pressure plate can change the stress state of the metal pipe mouth during correction, prevent the correction effect from being reduced due to local stress deformation, and improve the correction efficiency.

[0010] A method for correcting the orifice of a large metal pipe orifice corrector comprises the following steps:

[0011] 1) Take two metal pipes and connect their ends together;

[0012] 2) Rotate the two metal pipes in the circumferential direction so that the concave parts of the metal pipe openings face upwards and the openings of the non-deformed parts are aligned;

[0013] 3) Pull one of the metal pipes axially to form a gap between the pipe openings of the two metal pipes;

[0014] 4) Take the pressure plate and pressure rod, slide the pressure plate into the middle of the pressure rod, then take the L-shaped bottom clamp and place it flat on the inside of the recessed part of one of the metal pipes. Then insert one end of the pressure plate with the pressure rod into the socket hole on the L-shaped bottom clamp, and screw the lifting and tightening column made of bolts into the corresponding threaded mounting hole on the pressure plate so that the screwed-in end of the lifting and tightening column abuts against the outside of the recess.

[0015] 5) Adjust the position of the pressure rod forward and backward so that the two ends of the pressure rod are located above the corresponding protrusions on both sides of the depression;

[0016] 6) Screw the lifting rods into the corresponding mounting holes on the pressure rod, and continue to screw in the lifting rods corresponding to the protrusions until the screwed-in ends of the lifting rods abut against the top of the protrusions;

[0017] 7) Synchronously rotate the lifting rods at both ends, and the lifting rods push the raised part downward while the L-shaped bottom clamp pulls the recessed part upward;

[0018] 8) Axially adjust the position of the L-shaped bottom clamp, pressure plate and pressure rod, and repeat step 7) until the mouth of the metal pipe tends to be circular;

[0019] 9) Calibrate another metal pipe and repeat steps 4) to 8);

[0020] 10) Pull back the metal pipe pulled out in step 3) axially so that the pipe ends of the two metal pipes are butted together. If the misalignment of the two metal pipes exceeds the set value, repeat steps 3) to 9) until the misalignment of the pipe ends of the two metal pipes is within the set range.

[0021] First, turn the deformed side of the two metal pipe nozzles upward, and then dock the two nozzles to determine the misalignment position and misalignment amount. When the deformed side of the nozzle is facing upward, it is convenient for comparison and for the use of a large metal pipe nozzle corrector to correct the nozzle. After the comparison is completed, the deformation range to be corrected is marked on the nozzle for accurate correction. Then, a metal pipe is pulled out axially to form a correction implementation space between the two metal pipe nozzles. The corrector can be used to correct the deformed position of one of the metal pipe nozzles in turn. After the correction is completed, the two metal pipe nozzles are docked and compared until the misalignment amount is qualified. During this period, the other metal pipe nozzle can also be corrected according to the comparison result to achieve the purpose of rapid correction.

[0022] Preferably, the L-shaped bottom clamp and the pressure plate are both arranged axially relative to the metal pipe, and the pressure rod is perpendicular to the pressure plate. When the L-shaped bottom clamp and the pressure plate are arranged axially, they can be aligned with the deformation direction of the pipe mouth to achieve symmetrical and rapid correction.

[0023] Preferably, the pressure rod in step 4) is close to the protrusion. When the pressure rod is close to the protrusion, the stroke of the lifting rod can be reduced, thereby improving the correction efficiency, and the force applied by the lifting rod can be ensured to be stable, thereby improving the correction quality.

[0024] Preferably, a correction pressure plate is interposed between the protrusion in step 6) and the lift pin. The correction pressure plate prevents deformation of the local pressure point corresponding to the lift pin, ensuring correction quality. Furthermore, the correction pressure plate can reset the entire deformed area, improving correction efficiency.

[0025] Therefore, the large metal pipe orifice corrector and the pipe orifice correction method of the present invention have the following advantages:

[0026] The U-shaped clamp is clamped and fixed to the recess of the metal pipe mouth by lifting and clamping columns. During correction, according to the principle of action and reaction force, the lifting push rod pushes the protrusion downwards while the U-shaped clamp pulls the recess upwards, and the protrusions on both sides of the recess of the pipe mouth are synchronously corrected by the pressure rod, thereby realizing synchronous correction of the protrusions and recesses. The correction process is time-saving and labor-saving, convenient and fast, and has high correction efficiency. Since the forces acting on the protrusions and the recesses are the same, there will be no problems of insufficient or excessive correction. The pipe mouth correction effect is good, the overall structure is simple, and the production cost is low. The U-shaped clamp adopts a split structure, which is convenient for adjusting the position of the lifting push rod through the pressure plate, and has good versatility, which can meet the correction needs of pipe mouths with various deformation amounts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a large metal pipe orifice corrector according to the present invention;

[0028] Figure 2 is a top view of the present invention;

[0029] Figure 3 yes Figure 2 Left side view shown. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0031] Example:

[0032] like Figure 1 As shown, a large metal pipe nozzle corrector of the present invention includes a U-shaped clamp 2 clamped inside and outside the recess 11 of the pipe nozzle of the metal pipe 1, the U-shaped clamp 2 is located in the middle of the recess 11, and the U-shaped clamp 2 includes an L-shaped bottom clamp 21. The transverse edge of the L-shaped bottom clamp 21 extends horizontally inward along the axial direction into the pipe nozzle of the metal pipe 1 and is flatly attached to the bottom surface of the recess 11. The longitudinal edge of the L-shaped bottom clamp 21 extends radially outward along the outer edge of the pipe nozzle of the metal pipe 1. 1 is longitudinally arranged in the middle of the longitudinal side of a plurality of isosceles trapezoidal socket holes 23, in one of the socket holes 23, one end of the pressing plate 22 is inserted into the sliding engagement with each other, and the other end of the pressing plate 22 is horizontally provided with a pressing rod 6, the pressing plate 22 is vertically inserted into the middle of the pressing rod 6, and the two ends of the pressing rod 6 extend to the convex parts 12 of the metal pipe 1 on both sides of the concave part 11, respectively. A plurality of lifting rods 4 are arranged along the length direction on the pressing rod 6, which can be used to push the convex part 12 downward. Figure 3As shown, in the middle of the pressure plate 22 near the longitudinal edge of the L-shaped bottom clamp 21, there are two lifting and clamping columns 3 that can be placed on the outer surface of the recess 11. The two lifting and clamping columns 3 are arranged along the length direction of the pressure plate 22. The lifting and clamping columns 3 and the lifting push rod 4 are both bolts vertically screwed on the pressure plate 22. In order to avoid wear on the inner wall of the metal pipe 1, the lateral edge surface of the L-shaped bottom clamp 21 corresponding to the inner bottom surface of the recess 11 is adhered with an elastic pad 5 made of rubber material. In order to prevent the correction effect from being reduced due to local force deformation of the protrusion 12, and to improve the correction efficiency, a correction pressure plate 7 is paved between the lifting push rod 4 and the protrusion 12. The correction pressure plate 7 is long and extends along the axial direction of the metal pipe 1.

[0033] A method for correcting the orifice of a large metal pipe orifice corrector comprises the following steps:

[0034] 1) Take two metal pipes 1 and connect their ends together;

[0035] 2) Rotate the two metal pipes 1 in the circumferential direction so that the concave portion 11 of the pipe opening of the metal pipe 1 faces upward and the pipe opening of the non-deformed portion remains aligned to compare the misalignment. After comparison, mark the deformation range that needs to be corrected on the pipe openings of the two metal pipes 1;

[0036] 3) Pull one of the metal pipes 1 axially to form a gap between the pipe openings of the two metal pipes 1 so that the pipe openings can be corrected using a large metal pipe pipe opening corrector;

[0037] 4) Take the pressure plate 22 and the pressure rod 6, and insert the pressure plate 22 vertically into the middle of the pressure rod 6 by sliding. Then take the L-shaped bottom clamp 21, so that its horizontal edge is axially flat against the inside of the recess 11 of the pipe mouth of one of the metal pipes 1. Then, insert one end of the pressure plate 22 with the pressure rod 6 into the socket hole 23 on the longitudinal side of the L-shaped bottom clamp 21, with the pressure rod 6 close to the protrusion 12. Then, screw the two lifting and tightening columns 3 made of bolts into the corresponding threaded mounting holes on the pressure plate 22, so that the screwed-in ends of the lifting and tightening columns 3 abut against the outside of the recess 11;

[0038] 5) Adjust the position of the pressure rod 6 forward and backward so that the two ends of the pressure rod 6 are respectively located above the corresponding protrusions 12 on both sides of the depression 11;

[0039] 6) Install the correction pressure plate 7 axially above the protrusion 12, and screw in the lifting push rods 4 on the pressure rod 6 corresponding to the top of the protrusion 12, so that the screwed-in ends of the lifting push rods 4 abut against the correction pressure plate 7 at the top of the protrusion 12;

[0040] 7) Synchronously rotate the lifting rods 4 at both ends, so that the lifting rods 4 push the raised portion 12 downward while the lateral edge of the L-shaped bottom clamp 21 pulls the recessed portion 11 upward;

[0041] 8) Axially adjust the positions of the L-shaped bottom clamp 21, the pressure plate 22, and the pressure rod 6, and repeat step 7) until the mouth of the metal pipe 1 becomes circular;

[0042] 9) Calibrate another metal pipe 1 and repeat steps 4) to 8);

[0043] 10) Pull back the metal pipes 1 pulled out in step 3) axially so that the pipe ends of the two metal pipes 1 are butted together. If the misalignment of the two metal pipes 1 exceeds the set value, repeat steps 3) to 9) until the misalignment of the pipe ends of the two metal pipes 1 is within the set range.

[0044] The specific embodiments described herein are merely illustrative of the concepts of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A large metal pipe nozzle corrector, characterized by: The invention comprises a U-shaped clamp (2) clamped inside and outside a recess (11) of a metal pipe (1) pipe mouth, a pressure rod (6) is horizontally provided on the U-shaped clamp (2) corresponding to the outside of the metal pipe (1) pipe mouth, and both ends of the pressure rod (6) extend to the convex parts (12) of the metal pipe (1) pipe mouth corresponding to both sides of the recess (11), and a lifting rod (4) is provided on the pressure rod (6) for pushing the convex part (12) downward.

2. The large metal pipe orifice corrector according to claim 1, characterized in that: A lifting and tightening column (3) that can be placed on the concave portion (11) is provided on the U-shaped clamp (2) corresponding to the outside of the pipe mouth of the metal pipe (1).

3. The large metal pipe orifice corrector according to claim 2, characterized in that: The U-shaped clamp (2) includes an L-shaped bottom clamp (21), the transverse side of the L-shaped bottom clamp (21) horizontally extending into the pipe mouth of the metal pipe (1), the longitudinal side of the L-shaped bottom clamp (21) extending radially outward outside the pipe mouth of the metal pipe (1), and a pressure plate (22) slidingly inserted on the longitudinal side of the L-shaped bottom clamp (21), and the pressure plate (22) slidingly inserted in the middle of the pressure rod (6).

4. The large metal pipe orifice corrector according to claim 3, characterized in that: A plurality of socket holes (23) that match the pressure plate (22) are provided on the longitudinal side of the L-shaped bottom clamp (21), and the socket holes (23) are arranged along the longitudinal direction of the longitudinal side of the L-shaped bottom clamp (21).

5. The large metal pipe orifice corrector according to claim 1, characterized in that: A plurality of lifting push rods (4) are provided on the pressure rod (6) corresponding to the protrusion (12).

6. The large metal pipe orifice corrector according to claim 1, characterized in that: A correction pressure plate (7) is provided between the lifting push rod (4) and the protrusion (12).

7. A method for correcting the orifice of a large metal pipe according to claim 4, characterized in that: The following steps are included: 1) Take two metal pipes (1) and connect the pipe ends of the two metal pipes (1); 2) rotating the two metal pipes (1) in a circumferential direction so that the concave portion (11) of the pipe opening of the metal pipe (1) faces upward and the pipe openings of the non-deformed portion are aligned; 3) pulling one of the metal pipes (1) axially to form a gap between the pipe openings of the two metal pipes (1); 4) Take the pressure plate (22) and the pressure rod (6), slide the pressure plate (22) into the middle of the pressure rod (6), and then take the L-shaped bottom clamp (21) and place it flat in the concave part (11) of the pipe mouth of one of the metal pipes (1). Then, insert one end of the pressure plate (22) with the pressure rod (6) into the socket hole (23) on the L-shaped bottom clamp (21), and then screw the lifting and tightening column (3) made of bolts into the corresponding threaded mounting hole on the pressure plate (22), so that the screwed-in end of the lifting and tightening column (3) abuts against the outside of the concave part (11); 5) Adjust the position of the pressure rod (6) forward and backward so that the two ends of the pressure rod (6) are respectively located above the corresponding protrusions (12) on both sides of the recess (11); 6) Screw the lifting rods (4) into the corresponding mounting holes on the pressure rod (6), and continue to screw in the lifting rods (4) corresponding to the protrusions (12), so that the screwed-in ends of the lifting rods (4) abut against the top of the protrusions (12); 7) Synchronously rotate the lifting rods (4) at both ends, so that the lifting rods (4) push the raised portion (12) downward while the L-shaped bottom clamp (21) pulls the recessed portion (11) upward; 8) Axially adjust the positions of the L-shaped bottom clamp (21), the pressure plate (22) and the pressure rod (6), and repeat step 7) until the mouth of the metal pipe (1) tends to be circular; 9) Calibrate another metal pipe (1) and repeat steps 4) to 8); 10) Pull back the metal pipes (1) pulled out in step 3) axially so that the pipe ends of the two metal pipes (1) are butted together. If the misalignment of the two metal pipes (1) exceeds the set value, repeat steps 3) to 9) until the misalignment of the pipe ends of the two metal pipes (1) is within the set range.

8. The method for correcting the orifice of a large metal pipe orifice corrector according to claim 7, characterized in that: The L-shaped bottom clamp (21) and the pressing plate (22) are both arranged axially relative to the metal pipe (1), and the pressing rod (6) is perpendicular to the pressing plate (22).

9. The method for correcting the orifice of a large metal pipe orifice corrector according to claim 7, characterized in that: The pressing rod (6) in step 4) is close to the protrusion (12).

10. The method for correcting the orifice of a large metal pipe orifice corrector according to claim 7, characterized in that: A correction pressing plate (7) is provided between the protrusion (12) and the lifting push rod (4) in step 6).

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