Pipeline opening roundness correction device suitable for multiple pipe diameters

Abstract

A pipeline opening roundness correction device suitable for multiple pipe diameters comprises a roundness correction mechanism, the roundness correction mechanism comprises a bottom plate, a first support is installed on the bottom plate, a center shaft is installed at the upper end of the first support, a fixing plate is installed on the face, close to the inner side of the bottom plate, of the center shaft, a sliding groove is formed in one end of the fixing plate, and a sliding rod is slidably installed in the sliding groove; a rotating seat is mounted at one end of the sliding rod, a cam is rotationally mounted on the rotating seat, a plurality of limiting holes are uniformly distributed in the cam in a surrounding manner, a plurality of fixing holes corresponding to the limiting holes in position are formed in two side plates of the rotating seat, detachable positioning rods are mounted in the fixing holes, a straight plate is mounted at the other end of the sliding rod, and a hydraulic cylinder is arranged on the fixing plate; under the pulling of the hydraulic cylinder, the roundness correction of the pipe orifices of a pair of steel pipes is realized, so that the pipe orifices are efficiently and accurately welded, and the labor time and the operation intensity of workers are effectively reduced; and the cam can select a proper angle for contact according to the inner side surface of the pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe processing, and particularly relates to a pipe orifice rounding device applicable to multiple pipe diameters. Background Art

[0002] With the rapid development of modern engineering construction, especially in the structural engineering of buildings and oil and gas transportation, pipes are widely used as important construction materials. However, in the process of pipe processing, due to process limitations and material characteristics, the diameter sizes of the pipe orifices and any positions of the pipes are often difficult to fully meet the design and specification requirements, which directly affects the installation accuracy and overall stability of the pipe structure. There are now some pipe orifice rounding devices that can round the pipe orifices. For example, the invention patent with the application number 201911356503.1 and the patent name of steel pipe orifice rounding mechanism discloses two main body plates, two hydraulic cylinders with linear displacement sensors, one mandrel, two pin shafts, six pairs of clamping blocks, one limit slider, and one support base. By using the pulling force of the hydraulic cylinders and controlling with sensors, the ovality of the steel pipes can be changed, and a pair of steel pipes can be rounded and paired more conveniently, quickly, and safely. When rounding, a pair of steel pipes are aligned with the mandrels on both sides respectively, the short-axis side of the steel pipe orifice is clamped into the clamping blocks, and one side is clamped into the limit slider; a total of six pairs of clamping blocks are arranged, and steel pipes with six different diameters can be rounded respectively; the lifting lugs of the piston rods of the hydraulic cylinders are connected to the limit slider, and the cylinder barrel lifting lugs are connected to the main body plates through pin shafts, and the stroke can be controlled through the displacement sensors. However, some problems still occur in the actual use of this device. When synchronously rounding two relatively long pipes, due to the limitations of the processing space and the lifting tools, it is impossible to process the two pipes simultaneously, which directly limits the applicability of the device. Moreover, it only relies on the clamping blocks and sliders to stretch the pipes. When the slider applies force to the inner side of the pipe, the arc angle gap between the slider and the inner side wall of the pipe is too large, resulting in indentations on the inner wall of the pipe and incomplete rounding of the pipe, which affects the quality of the pipe.

[0003] Therefore, a pipe orifice rounding device applicable to multiple pipe diameters is needed to solve this problem. Summary of the Utility Model

[0004] In view of the above situation, to overcome the deficiencies of the prior art, the purpose of the present utility model is to provide a pipe orifice rounding device applicable to multiple pipe diameters, which effectively solves the above problems.

[0005] The technical solution it adopts is that the utility model includes a circularity correcting mechanism. The circularity correcting mechanism includes a bottom plate. A first bracket is installed on the bottom plate. A central shaft is installed at the upper end of the first bracket. A fixing plate is installed on one side of the central shaft close to the inner side of the bottom plate. A chute is formed at one end of the fixing plate. A sliding rod is slidably installed in the chute. A rotating seat is installed at one end of the sliding rod. A cam is rotatably installed on the rotating seat. A plurality of limiting holes are evenly distributed around the cam. A plurality of fixing holes corresponding to the positions of the limiting holes are provided on the two side plates of the rotating seat. Removable positioning rods are installed in the fixing holes. A straight plate is installed at the other end of the sliding rod. A hydraulic cylinder is provided on the fixing plate. One end of the hydraulic cylinder is connected to the first bracket, and the other end of the hydraulic cylinder is connected to the straight plate. A group of arc-shaped clamping blocks are installed at the other end of the fixing plate.

[0006] Further, the inner diameters of each of the arc-shaped clamping blocks are different from each other.

[0007] Further, the number of the limiting holes is greater than the number of the fixing holes.

[0008] Further, it includes two circularity correcting mechanisms. The central shafts of the two circularity correcting mechanisms are fixedly connected to the first bracket through keys. Positioning holes are provided on both of the two central shafts. A positioning shaft is movably installed in the positioning holes.

[0009] Further, no hydraulic cylinder is provided on one of the circularity correcting mechanisms. The two straight plates are connected through a removable connecting plate.

[0010] Further, the fixing plate is rotatably connected to the first bracket through the central shaft. A driving motor for driving the central shaft to rotate is installed on the first bracket.

[0011] Further, a second bracket is also provided on the bottom plate. The height of the second bracket is lower than that of the first bracket. A fixing frame is fixedly installed at the upper end of the second bracket. At least one vertical telescopic rod is installed at the upper end of the fixing frame. A hinge seat is installed at the upper end of the telescopic rod. A roller is rotatably installed on the hinge seat. A spring is also provided at the upper end of the fixing frame. The end of the spring is connected to the hinge seat.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. Driven by the hydraulic cylinder, the circularity correction of a pair of steel pipe pipe orifices is realized, so as to carry out pipe orifice welding efficiently and accurately, effectively reducing the labor time and working intensity of workers and improving the working efficiency;

[0014] 2. A plurality of limiting holes are provided on the cam, so that the cam can select a suitable angle to contact according to the inner side of the pipeline. Through the installation of the positioning rod, the cam can be fixed at the selected angle, so as to meet the requirements of different pipelines. Combined with a plurality of arc-shaped clamping blocks with different inner diameters, the flexibility and accuracy of circularity correction are effectively improved.

[0015] 3. By coaxially setting the central axes of two pipe-rounding mechanisms through a positioning shaft, it can ensure that the forms of two pipes to be docked are consistent during pipe-rounding, greatly facilitating the pipe docking work and improving work efficiency.

[0016] 4. The fixed plate can be driven to rotate by a driving motor to realize the full-rounding of the pipe by the cam and the arc-shaped clamping block, further improving the quality of pipe-rounding.

[0017] 5. By setting the roller and the hinge seat, it can conveniently detect whether the roundness of the pipe is qualified, providing an intuitive basis for the results of pipe-rounding. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the first state of the present utility model.

[0019] Figure 2 is a schematic structural diagram of the second state of the present utility model.

[0020] Figure 3 is the present utility model Figure 1 an enlarged view of A in.

[0021] Figure 4 is a schematic structural diagram of the cam of the present utility model.

[0022] Figure 5 is the present utility model Figure 1 an enlarged view of B in. Detailed Description of the Invention

[0023] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0024] Embodiment 1:

[0025] As Figure 1 given, the present utility model includes a pipe-rounding mechanism. The pipe-rounding mechanism includes a bottom plate 1. A first bracket 2 is installed on the bottom plate 1. A central shaft 3 is installed at the upper end of the first bracket 2. A fixed plate 4 is installed on the side of the central shaft 3 close to the inner side of the bottom plate 1. A chute 5 is opened at one end of the fixed plate 4. A sliding rod 6 is slidably installed in the chute 5. A rotating seat 7 is installed at one end of the sliding rod 6. According to Figure 3It can be known that a cam 8 is rotatably installed on the rotating seat 7. A plurality of limiting holes 81 are evenly distributed around the axis of the cam 8. On the two side plates of the rotating seat 7, there are a plurality of fixing holes 71 corresponding to the positions of the limiting holes 81. A detachable positioning rod is installed in the fixing holes 71. When the positioning rod is not installed, the cam 8 can be rotated to select an arc surface at an appropriate angle of the cam 8 to contact the inner side surface of the pipeline. After selecting the angle, the positioning rod is then installed into the fixing holes 71 and the limiting holes 81 to fix the cam 8. It should be noted that as many limiting holes 81 as possible can be set so that the cam 8 has enough angles for positioning. In addition, the positioning rod can be a pin or a bolt. The other end of the sliding rod 6 is installed with a straight plate 9. A hydraulic cylinder 10 is provided on the fixing plate 4. One end of the hydraulic cylinder 10 is connected to the first bracket 2, and the other end of the hydraulic cylinder 10 is connected to the straight plate 9. A set of arc-shaped clamping blocks 11 are installed at the other end of the fixing plate 4. One end of the short axis of the pipe orifice of the pipe to be roundness-corrected is installed on one of the arc-shaped clamping blocks 11, and the other end of the pipe orifice is in contact with the cam 8. At this time, the hydraulic cylinder 10 can be used to pull the pipe orifice for roundness correction.

[0026] The inner diameters of each of the arc-shaped clamping blocks 11 are different from each other, and the distance between every two arc-shaped clamping blocks 11 is greater than 40 mm. The arc-shaped clamping blocks 11 with different inner diameters can adapt to pipes with corresponding diameters as much as possible.

[0027] From Figure 4 It is obtained that the number of the limiting holes 81 is greater than the number of the fixing holes 71. By setting a sufficient number of limiting holes 81, the cam 8 can have multiple fixable angles. The positioning rod can be installed in a small number of fixing holes 71 sufficient to position the cam 8, which can reduce the grooving on the side plate of the rotating seat 7 and thus minimize the reduction of the rigidity of the rotating seat 7.

[0028] It includes two roundness correction mechanisms. The central axes 3 of the two roundness correction mechanisms are fixedly connected to the first bracket 2 through keys. Positioning holes are provided on both of the central axes 3, and positioning shafts 31 are movably installed in the positioning holes, which can make the central axes 3 of the two roundness correction mechanisms coaxial, so that two pipes to be butted can be respectively installed. At this time, the device is in the first state for use.

[0029] One of the roundness correction mechanisms is not provided with a hydraulic cylinder 10. The two straight plates 9 are connected by a detachable connecting plate. One hydraulic cylinder 10 controls the common advancement and retraction of the two cams 8, which can reduce the use of one hydraulic cylinder 10.

[0030] Embodiment 2:

[0031] From Figure 2It is given that the fixed plate 4 is rotatably connected to the first bracket 2 through the central shaft 3. A driving motor 12 for driving the central shaft 3 to rotate is installed on the first bracket 2. When the installation of the pipe nozzle is completed and the stretching and roundness correction are completed through the hydraulic cylinder 10, the position of the pipe can be fixed by other fixing mechanisms. The driving motor 12 is used to drive the fixed plate 4 to rotate, so that the cam 8 and the arc-shaped block 11 perform comprehensive roundness correction on the pipe. Among them, other fixing mechanisms can adopt the fixing methods in the prior art, such as fixing with a sling or a chuck, etc. Since it is the prior art, the specific method will not be described here. At this time, the device is in the second state of use.

[0032] Embodiment 3:

[0033] It is given that Figure 5 a second bracket 13 is provided on the bottom plate 1. The height of the second bracket 13 is lower than that of the first bracket 2. A fixing frame 14 is fixedly installed at the upper end of the second bracket 13. At least one vertical telescopic rod 15 is installed at the upper end of the fixing frame 14. A hinge seat 16 is installed at the upper end of the telescopic rod 15. A roller 17 is rotatably installed on the hinge seat 16. A spring 18 is also provided at the upper end of the fixing frame 14. The end of the spring 18 is connected to the hinge seat 16. After the installation and roundness correction of the pipe, since the roller 17 is always pressed against the outer side wall of the pipe under the action of the spring 18, by rotating the pipe, it can be observed whether the hinge seat 16 moves up and down, so as to judge whether the roundness of the pipe is qualified.

[0034] When the present utility model is in use, when a pipe is installed on the cam 8 and the arc-shaped block 11 of a roundness correction mechanism, stretching is performed through the hydraulic cylinder 10 for roundness correction. Two roundness correction mechanisms can also be connected. The roundness correction can be carried out by respectively installing two pipes to be butted on the two roundness correction mechanisms, which can ensure that the shapes of the two pipes are the same and facilitate butt joint.

[0035] When restricted by the site or the quality of pipe roundness correction needs to be improved, only one roundness correction mechanism can be adopted. After the stretching and roundness correction of the hydraulic cylinder 10 are completed, the driving motor 12 can be used to drive the rotation of the fixed plate 4, so that the cam 8 and the arc-shaped block 11 perform sufficient roundness correction on the pipe to ensure the quality of the pipe.

[0036] After the roundness correction of the pipe is completed, by rotating the pipe, the roundness correction result of the pipe can be judged through the changes of the roller 17 and the hinge seat 16.

[0037] The beneficial effects of the present utility model are:

[0038] 1. Under the pulling of the hydraulic cylinder, the roundness correction of a pair of steel pipe nozzles is realized, so as to efficiently and accurately perform nozzle welding, effectively reducing the labor time and working intensity of workers and improving the working efficiency;

[0039] 2. Multiple limit holes are provided on the cam, enabling the cam to contact at a suitable angle according to the inner side of the pipeline. Through the installation of the positioning rod, the cam can be fixed at the selected angle, thus meeting the requirements of different pipelines. Combined with multiple arc-shaped blocks with different inner diameters, the flexibility and accuracy of circularity correction are effectively improved.

[0040] 3. The central axes of the two circularity correction mechanisms are coaxially arranged through the positioning shaft, which can ensure that the forms of the two pipelines to be butted are consistent during circularity correction, greatly facilitating the butt joint work of the pipelines and improving work efficiency.

[0041] 4. The fixed plate can be rotated by driving the motor to realize the full circularity correction of the pipeline by the cam and the arc-shaped block, further improving the quality of circularity correction.

[0042] 5. Through the arrangement of the roller and the hinge seat, it is convenient to detect whether the roundness of the pipeline is qualified, providing an intuitive basis for the results of circularity correction.

[0043] The above specific embodiments / examples are specific embodiments of the present invention, used to illustrate the concept of the present invention, and are all explanatory and exemplary, and should not be construed as a limitation to the embodiments of the present invention and the scope of the present invention. Except for the embodiments recorded herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of this application. These technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments recorded herein, and are all within the protection scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pipe orifice rounding device applicable to multiple pipe diameters, characterized in that, It includes a circularity correcting mechanism. The circularity correcting mechanism includes a bottom plate (1). A first support (2) is installed on the bottom plate (1). A central shaft (3) is installed at the upper end of the first support (2). A fixing plate (4) is installed on one side of the central shaft (3) close to the inner side of the bottom plate (1). A chute (5) is formed at one end of the fixing plate (4). A sliding rod (6) is slidably installed in the chute (5). A rotating seat (7) is installed at one end of the sliding rod (6). A cam (8) is rotatably installed on the rotating seat (7). A plurality of limiting holes (81) are evenly distributed around the cam (8). A plurality of fixing holes (71) corresponding to the positions of the limiting holes (81) are provided on two side plates of the rotating seat (7). A detachable positioning rod is installed in the fixing holes (71). A straight plate (9) is installed at the other end of the sliding rod (6). A hydraulic cylinder (10) is provided on the fixing plate (4). One end of the hydraulic cylinder (10) is connected to the first support (2), and the other end of the hydraulic cylinder (10) is connected to the straight plate (9). A set of arc-shaped clamping blocks (11) is installed at the other end of the fixing plate (4).

2. The pipe orifice rounding device applicable to multiple pipe diameters according to claim 1, characterized in that, The inner diameters of each of the arc-shaped clamping blocks (11) are different from each other.

3. A pipe orifice rounding device applicable to multiple pipe diameters according to claim 1, characterized in that, The number of the limiting holes (81) is greater than the number of the fixing holes (71).

4. A pipe orifice rounding device applicable to multiple pipe diameters according to claim 1, characterized in that, It includes two circularity correcting mechanisms. The central shafts (3) of the two circularity correcting mechanisms are fixedly connected to the first supports (2) through keys. Positioning holes are provided on both of the two central shafts (3), and a positioning shaft (31) is movably installed in the positioning holes.

5. The pipe orifice rounding device applicable to multiple pipe diameters according to claim 4, characterized in that, No hydraulic cylinder (10) is provided on one of the circularity correcting mechanisms, and the two straight plates (9) are connected through a detachable connecting plate.

6. The pipe orifice rounding device applicable to multiple pipe diameters according to claim 1, characterized in that The fixing plate (4) is rotatably connected to the first support (2) through the central shaft (3), and a driving motor (12) for driving the central shaft (3) to rotate is installed on the first support (2).

7. A pipe orifice rounding device applicable to multiple pipe diameters according to any one of claims 1, 4 or 5, characterized in that, A second support (13) is further provided on the bottom plate (1). The height of the second support (13) is lower than that of the first support (2). A fixing frame (14) is fixedly installed at the upper end of the second support (13). At least one vertical telescopic rod (15) is installed at the upper end of the fixing frame (14). A hinge seat (16) is installed at the upper end of the telescopic rod (15). A roller (17) is rotatably installed on the hinge seat (16). A spring (18) is further provided at the upper end of the fixing frame (14), and the end of the spring (18) is connected to the hinge seat (16).

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