A method for pressing a joint of a steel pipe and a device for adjusting the roundness of a steel pipe joint

Abstract

The present application relates to the field of steel pipe installation, and particularly relates to a steel pipe joint pressing and jointing method and a steel pipe joint adjusting device, a plurality of telescopic supports are uniformly distributed in the first circumferential direction of the main body to provide radial support, the pressing rods are arranged at the ends of the corresponding telescopic supports, so that all the pressing rods are uniformly distributed in the first circumferential direction of the main body, two rolling members are arranged on the side of the pressing rods away from the main body, so that the two rolling members can be respectively supported in the inner sides of the butt joints of two adjacent steel pipe joints during pressing, the steel pipe joint adjusting device has two rotational degrees of freedom relative to the two steel pipe joints which need to be pressed and jointed to form staggered joints, due to the deformation of the end of the steel pipe joint, the steel pipe joint can slightly move in the first circumferential direction of the main body relative to the corresponding rolling member, so that the rolling member can be supported on the circumferential equidivision points of the adjacent steel pipe joints, and the equidivision points of the adjacent steel pipe joints are one-to-one corresponding through the pressing rods, so that the butt joint of the adjacent steel pipe joints is accurate.

Description

Technical Field

[0001] This invention relates to the field of steel pipe installation, and in particular to a method for pressing steel pipe sections together and a device for adjusting the roundness of steel pipe sections. Background Technology

[0002] In the installation of pressure steel pipes for domestic hydropower stations, the common practice for pressing the circumferential seam of pipe sections on site is to weld pressure marks or swivels on the inner or outer wall of the steel pipe section, and then use wedges or jacks to adjust the misalignment of the circumferential seam of the pipe section.

[0003] Using traditional methods for circumferential joint sealing of pipe sections may pose quality risks to the pipe section base material. This is mainly because when welding the sealing clips or the seven-point bends, preheating is required before welding the sealing clips, and the interlayer temperature and heat input need to be controlled during welding. This requires a large amount of manual labor for welding. In addition, the use of traditional jacks for rounding has problems such as multiple adjustments, inaccurate adjustment accuracy, and slippage of the jacks. Multiple manual operations are required to complete the final rounding construction, resulting in extremely low work efficiency and high construction safety risks.

[0004] Currently, some publicly available technologies employ a "rice"-shaped support combined with hydraulic adjustment for rounding, which improves construction efficiency and reduces safety risks compared to manual jacks. While the "rice"-shaped support method solves the problems of low efficiency and high safety risks compared to traditional manual jacks, it lacks guiding and docking functions, making it difficult to guide and position when used in vertical shafts. Furthermore, Chinese invention patent application CN118933794A discloses an automated operation platform and method for installing large-diameter, high-strength steel pipe sections in deep vertical shafts. The disclosed method involves: a chain electric hoist lowering one end of the jointing plate, driving a rotary table to rotate, adjusting the first hydraulic cylinder to the misaligned position between the steel pipe section and the previous section, and driving the second hydraulic cylinder to extend the... After the dynamic support shoe is pressed against the inner wall of the steel pipe section, the first hydraulic cylinder is driven to extend and slowly push the pipe wall (the steel pipe section) at the misalignment position until the misalignment adjustment is completed. In this misalignment adjustment method, once the first hydraulic cylinder pushes against the pipe wall of the upper and lower steel pipe sections at the misalignment position and is pressed against the inner wall of the steel pipe section, it will be unable to rotate and adjust due to the large friction. Since the diameter of the steel pipe section is large, the end of the steel pipe section cannot be guaranteed to be circular, and the diameter of adjacent steel pipe sections has a certain difference within the error range. As a result, the pressure support cannot be supported on the circumferential division points of adjacent steel pipe sections, which may cause the pipe opening to be excessively deformed in a local adjustment and misalignment. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the large diameter of steel pipe sections, the inability to guarantee that the ends of steel pipe sections are circular, and the certain difference in diameter between adjacent steel pipe sections within the error range, which prevents the pressure joint support from being supported at the circumferentially divided points of adjacent steel pipe sections, resulting in excessive local adjustment deformation of the pipe ends and inaccurate connection. This invention provides a method for pressing and assembling steel pipe sections and a device for adjusting the circularity of steel pipe sections.

[0006] In a first aspect, the present invention provides a steel pipe section rounding device, comprising:

[0007] The main body has a first axial direction, a first circumferential direction surrounding the first axial direction, and a first radial direction corresponding to the first circumferential direction;

[0008] Multiple retractable supports are provided, all of which are evenly distributed outward along the first circumference of the main body. The retractable supports are arranged along the first radial direction of the main body, one end of each retractable support is fixed to the main body, and the retractable supports can extend and retract along the first radial direction of the main body.

[0009] Multiple pressure rods are provided, which are arranged along the first axial direction of the main body. The middle of the pressure rod is fixedly disposed at the end corresponding to the telescopic support. Rolling elements are respectively provided on the side of the pressure rod away from the main body and on both sides of the telescopic support in the first axial direction. The rolling elements are capable of rolling along the first circumferential direction.

[0010] The first axial direction of the main body corresponds to the axial direction of the steel pipe section that needs to be rounded, the first circumferential direction of the main body corresponds to the circumferential direction of the steel pipe section that needs to be rounded, and the first radial direction of the main body corresponds to the radial direction of the steel pipe section that needs to be rounded.

[0011] The steel pipe section rounding device of the present invention comprises a main body consisting of multiple telescopic supports providing radial support. Pressure rods are disposed at the ends of the corresponding telescopic supports, i.e., evenly distributed in the first circumference of the main body. Two rolling elements are mounted on the side of the pressure rod away from the main body, and these two rolling elements are located on both sides of the telescopic support in the first axial direction. This allows the steel pipe section rounding device to be supported on the inner side of the butt joint of two adjacent steel pipe sections during the pressing process. Each rolling element has one degree of rotational freedom relative to its corresponding steel pipe section. In other words, the steel pipe section rounding device has two degrees of rotational freedom relative to the two steel pipe sections that need to be pressed to form a staggered joint. When the telescopic support extends, causing the two rolling elements to abut against the inner side of the butt joint of two adjacent steel pipe sections, the deformation of the ends of the steel pipe sections allows them to move slightly relative to the rolling elements in the first circumference of the main body. This allows the rolling elements to be supported at the circumferentially divided points of the adjacent steel pipe sections. These circumferentially divided points of the adjacent steel pipe sections correspond one-to-one with the pressure rods, ensuring accurate butt jointing of the adjacent steel pipe sections and facilitating subsequent welding.

[0012] Preferably, the end of the retractable support is connected to the longitudinal center of the pressure rod, and the rolling elements on the retractable support are symmetrically arranged relative to the retractable support, which can make the force uniform and the ability to adapt to deformation better.

[0013] Preferably, the pressure bar is provided with a rolling cavity corresponding to each of the rolling elements, the rolling elements are rotatably disposed in the rolling cavity, and the rolling elements protrude from the side of the pressure bar away from the main body.

[0014] Setting scrollbars by embedding them makes the scrolling process more stable.

[0015] Preferably, the rolling element is a bearing, a roller, or a track.

[0016] Preferably, the pressure rod can rotate relative to the main body in a first axial direction. After the butt joint of two adjacent steel pipe sections is pressed, an annular weld is formed. When welding the inner annular weld of the two adjacent steel pipe sections, the pressure rod can rotate relative to the main body in a first axial direction to avoid welding space, thereby completing the welding of the inner annular weld.

[0017] Preferably, the telescopic support is rotatable in the first circumferential direction, which allows the pressure rod to move circumferentially along the steel pipe section to complete the pressing of all welds, resulting in a better pressing effect.

[0018] Preferably, both ends of the pressure rod are provided with guide slopes on the side away from the main body, and the guide slopes are set at an acute angle to the first axis of the main body.

[0019] The guide ramp allows for the installation of the steel pipe section rounding device inside the steel pipe section, and also facilitates the installation of the steel pipe section outside the rounding device, making the installation more convenient and faster.

[0020] Preferably, a transition slope is provided between the guide slope and the adjacent rolling element, the angle of the transition slope is the same as that of the guide slope, one side of the transition slope is adjacent to one side of the guide slope, and the other side of the transition slope is adjacent to the outer surface of the rolling element.

[0021] Since the inner side of the steel pipe section ultimately contacts the rolling element, and the setting of the rolling element will affect the guidance of the transition slope of the steel pipe section rounding device, by providing a transition slope between the guide slope and the adjacent rolling element, the angle of the transition slope is the same as that of the guide slope, one side of the transition slope is adjacent to one side of the guide slope, and the other side of the transition slope is adjacent to the outer surface of the rolling element, the influence of the rolling element setting on the guiding effect can be overcome.

[0022] Preferably, the transition slope is disposed at one end of the rolling element adjacent to the transition slope, which facilitates processing and facilitates the transition from the guide slope to the rolling element during guidance.

[0023] Preferably, the transition slope is symmetrically disposed at both ends of the rolling element. Disposing the transition slope at both ends of the rolling element ensures the symmetry of the rolling element, reduces the impact on rolling, facilitates processing, and facilitates the transition from the guide slope to the rolling element during guidance.

[0024] Preferably, the angle between the guide slope and the first axis of the main body is less than or equal to 45°, so as to avoid the radial range from becoming too wide during the guiding process due to the excessive angle, thereby improving the guiding effect.

[0025] Preferably, the central structure of the main body is cylindrical or prismatic, which facilitates the uniform arrangement of multiple retractable supports and provides balanced force distribution.

[0026] Preferably, the main body includes an extension section arranged along the first radial direction of the main body, and the telescopic support is connected to the end of the corresponding extension section. Since the total length of the telescopic support is generally limited, by setting the extension section, it is possible to adapt to the jointing and pressing of steel pipe sections with larger diameters. At the same time, when using the jointing and pressing of steel pipe sections with the same diameter, a telescopic support with a smaller length adjustment range can be selected, which can save costs.

[0027] Preferably, the retractable support is equipped with a sensor that collects the retractable dimension data of the retractable support. The collected retractable dimension data is used to guide the adjustment dimension of each retractable support. The adjustment dimension of each retractable support can be adjusted in real time by collecting the data, so that the adjustment dimension is more accurate.

[0028] In a second aspect, the present invention provides a method for pressing joints in steel pipe sections, employing a steel pipe section rounding device. The steel pipe section rounding device includes: a main body, multiple telescopic supports, and pressure rods corresponding to the telescopic supports; all the telescopic supports are evenly distributed along the inner circumference of the steel pipe section, the telescopic supports are arranged radially along the steel pipe section, one end of the telescopic support is fixed to the main body, and the other end is fixedly provided with the pressure rod. The telescopic support can extend and retract radially along the steel pipe section, driving the pressure rod to move radially along the steel pipe section. The pressure rod is arranged axially along the steel pipe section, and the longitudinal middle part of the pressure rod is fixedly provided at the end corresponding to the telescopic support. Rolling elements are respectively provided on the side of the pressure rod away from the main body and on both sides of the telescopic support on the axial side of the steel pipe section, and the rolling elements can roll circumferentially along the steel pipe section.

[0029] The method for pressing and sealing steel pipe sections includes the following steps:

[0030] S1. The steel pipe section rounding device is set inside the adjacent ends of the adjacent steel pipe sections, so that the two rolling parts of the pressure rod are respectively set inside the adjacent ends of the adjacent steel pipe sections.

[0031] S2. Through the extension and retraction of the telescopic support, the two rolling elements of each pressure bar abut against the inner side of the adjacent ends of two adjacent steel pipe sections respectively. At the same time, the adjacent steel pipe sections deform or rotate to change the abutment position of the rolling elements until all rolling elements abut against the corresponding circumferentially divided points of the steel pipe sections, and the circumferentially divided point pressing is completed.

[0032] The number of circumferentially divided points of the steel pipe section corresponds to the number of expandable supports.

[0033] The above-mentioned method of pressing and sealing steel pipe sections utilizes two rolling elements on the pressure rod. These rolling elements abut against the inner sides of adjacent ends of two adjacent steel pipe sections, giving each rolling element a rotational degree of freedom relative to its corresponding steel pipe section. This means the steel pipe section rounding device has two rotational degrees of freedom relative to the two steel pipe sections requiring crimping to form a staggered joint. During crimping adjustment, the telescopic support of the rounding device allows both the device and the steel pipe section to rotate slightly circumferentially, automatically adapting to deformation during adjustment. This prevents the rounding device from jamming, making the adjustment operation easier and more accurate. Furthermore, the pressure rod is supported at circumferentially equidistant points on adjacent steel pipe sections, resulting in more accurate jointing and facilitating subsequent welding.

[0034] Preferably, in S1, when adjacent steel pipe sections have misaligned edges due to different circumferences, a shim is provided between the inner wall of the pipe section with the larger circumference and the corresponding rolling element to eliminate the misalignment gap and facilitate the rounding of the pipe opening.

[0035] Preferably, it also includes S3, where the control rod moves circumferentially along the steel pipe section to complete the pressing of all welds, resulting in a better pressing effect.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] 1. This invention provides a steel pipe section rounding device. It provides radial support by uniformly distributing multiple retractable supports along the first circumference of the main body. Pressure rods are positioned at the ends of the corresponding retractable supports, ensuring all pressure rods are uniformly distributed along the first circumference of the main body. Rolling elements are mounted on the side of the pressure rod away from the main body, with these rolling elements positioned at both ends of the pressure rod. This allows the pressure rod to be supported on the inner side of the butt joint of two adjacent steel pipe sections during pressing, ensuring each rolling element has one degree of rotational freedom relative to its corresponding steel pipe section. The rounding device has two rotational degrees of freedom relative to the two steel pipe sections that need to be pressed to form a staggered joint. When the telescopic support extends so that the rolling elements at both ends of the pressure rod abut against the inner side of the butt joint of the two adjacent steel pipe sections, the deformation of the ends of the steel pipe sections allows the two adjacent steel pipe sections to move slightly relative to the corresponding rolling elements in the first circumferential direction of the main body. This allows the rolling elements to be supported on the circumferentially divided points of the corresponding steel pipe sections. The circumferentially divided points of the adjacent steel pipe sections correspond one-to-one through the pressure rod, ensuring accurate butt jointing of the adjacent steel pipe sections and facilitating subsequent welding.

[0038] 2. This invention provides a method for pressing and sealing steel pipe sections together. Because the pressure rod is equipped with two rolling elements, each rolling element abuts against the inner side of the adjacent ends of two adjacent steel pipe sections. This allows each rolling element to have one degree of rotational freedom relative to its corresponding steel pipe section. In other words, the steel pipe section rounding device has two degrees of rotational freedom relative to the two steel pipe sections that need to be pressed together to form a staggered joint. During the pressing and sealing adjustment, the telescopic support of the steel pipe section rounding device allows both the device and the steel pipe section to rotate slightly circumferentially. This automatically adapts to the deformation during rounding, preventing the rounding device from jamming. This makes the rounding operation easier and more accurate, allowing the pressure rod to be supported at the circumferentially equidistant points of adjacent steel pipe sections, thus making the connection between adjacent steel pipe sections more accurate and facilitating subsequent welding. Attached Figure Description

[0039] Figure 1 A three-dimensional schematic diagram of a steel pipe section rounding device;

[0040] Figure 2 A top view of the steel pipe section rounding device;

[0041] Figure 3 This is a side view of the steel pipe section rounding device;

[0042] Figure 4 for Figure 3 A magnified view of a portion of circle A in the middle;

[0043] Figure 5 A schematic diagram of the steel pipe section rounding device in use (half section of the upper steel pipe section).

[0044] Figure 6 for Figure 5 Top view;

[0045] Figure 7 for Figure 5 Front view;

[0046] Figure 8 for Figure 5 Side view;

[0047] Figure 9 for Figure 8 A magnified view of the area at point B in the middle circle;

[0048] Figure 10 A schematic diagram of a pressure joint where misalignment exists between different circumferential butt joints of upper and lower steel pipe sections;

[0049] Figure 11 for Figure 10 A magnified view of the area at point C in the middle circle;

[0050] Figure 12 This is a top view of the second type of steel pipe section rounding device;

[0051] Figure 13 This is a side view of the second type of steel pipe section rounding device;

[0052] Figure 14 A schematic diagram showing the usage status of the third type of steel pipe section rounding device;

[0053] Figure 15 This is a schematic diagram of the pressure rod of the third type of steel pipe section rounding device after it rotates along the main body axis.

[0054] The markings in the diagram are: 1. Main body; 11. Extension section; 112. Hinge shaft; 12. Rotation mechanism; 2. Telescopic support; 3. Pressure bar; 31. Main beam; 312. Guide slope; 32. Rolling cavity; 4. Rolling element; 41. Transition slope; 5. Steel pipe section; 51. Inner circumferential weld; 6. Pad plate. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0056] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0057] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0058] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0059] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0060] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0061] Example 1

[0062] like Figures 1-10 As shown, a steel pipe section rounding device is mainly used for adjusting the circumferential joint when two steel pipe sections 5 are joined together. It includes: a main body 1, multiple telescopic supports 2 and multiple pressure rods 3.

[0063] The main body 1 has a first axial direction, a first circumferential direction surrounding the first axial direction, and a first radial direction corresponding to the first circumferential direction. The first axial direction of the main body corresponds to the axial direction of the steel pipe section to be rounded, the first circumferential direction of the main body corresponds to the circumferential direction of the steel pipe section to be rounded, and the first radial direction of the main body corresponds to the radial direction of the steel pipe section to be rounded. The main body 1 is made of profiles, plates, etc., and has an overall annular or star-shaped structure to fit the inner wall of the steel pipe section. The axial direction of the annular or star-shaped structure is the first axial direction. Of course, the main body can also be spherical. When the main body is spherical, the sphere has multiple axial, circumferential, and radial directions; therefore, the axial direction of the sphere corresponding to the axial direction of the steel pipe section to be rounded is taken as the first axial direction.

[0064] In an optional embodiment, the central structure of the main body 1 is cylindrical or prismatic, which facilitates the even distribution of multiple retractable supports 2 and provides balanced force distribution. Figure 2 As shown, the central structure of the main body 1 is a quadrangular prism, and correspondingly, it is provided with 4 telescopic supports 2 and 4 pressure rods 3, that is, each corner of the quadrangular prism is connected to a telescopic support 2 and a pressure rod 3.

[0065] Multiple retractable supports 2 represent at least three sets. All retractable supports 2 are evenly distributed outward along the first circumference of the main body 1. The retractable supports 2 are arranged along the first radial direction of the main body 1, meaning the retractable supports 2 can be perpendicular to the inner wall of the steel pipe section. One end of each retractable support 2 is fixed to the main body 1, and the retractable support 2 can extend and retract along the first radial direction of the main body 1, changing its length perpendicular to the inner wall of the steel pipe section. The retractable supports 2 are arranged circumferentially along the main body 1 and can be made of profiles, steel pipe sections, plates, etc. The retractable supports 2 can be implemented using hydraulic cylinders, jacks, electric push rods, electric screws, etc., simply by changing their length along the first radial direction of the main body 1. Depending on the inner diameter of the steel pipe section 5, to facilitate the transportation of the steel pipe section rounding device, the circumferentially arranged retractable supports 2 are fixed by a detachable connection, allowing them to be removed during transportation to reduce the transportation volume.

[0066] like Figure 1 and Figure 2As shown, the central structure of the main body 1 is a quadrangular prism. Each corner of the quadrangular prism has a radially arranged extension section 11. The telescopic support 2 is connected to the corresponding end of the extension section 11. Since the total length of the telescopic support 2 is generally limited, by setting the extension section 11, it is possible to accommodate the mating and pressing of steel pipe sections 5 with larger diameters. At the same time, when used for mating and pressing of steel pipe sections 5 with the same diameter, a telescopic support 2 with a smaller length adjustment range can be selected, which can save costs.

[0067] In this design, it is best to install two retractable supports 2 located on the same diameter, capable of expanding a circle around a diameter. Ideally, these supports should form a vertical cross-shaped design, such as... Figure 6 As shown, a more rounded shape is better.

[0068] like Figure 1 and Figure 2 As shown, the main body 1 includes four extended sections 11 arranged in a cross shape. Adjacent extended sections 11 are connected by inclined supports at a 45° angle. The telescopic support 2 is connected to the end of the corresponding extended section 11. The inclined support ensures that all extended sections 11 form a whole, which can be adapted to the use of pressing joints in steel pipe sections 5 with larger diameters.

[0069] The pressure rod 3 includes a main beam 31 and rolling elements 4. The rolling elements 4 are rolled on the side of the main beam 31 away from the main body 1. The main beam 31 can be a profile or plate, made by casting or forging. The longitudinal center of the main beam 31 is fixedly located at the end corresponding to the telescopic support 2. The pressure rod 3 is arranged along the first axial direction of the main body 1, that is, the pressure rod 3 is parallel to the inner wall of the steel pipe section and arranged along the axial direction of the steel pipe section, so as to facilitate the adjustment of the circumferential joint between the two steel pipe sections. Two rolling elements 4 are rolled on the side of the pressure rod 3 away from the main body 1, such as... Figure 3 and Figure 4 As shown, the two rolling elements are located on both sides of the telescopic support in the first axial direction, or in other words, at both ends of the longitudinal direction of the pressure rod 3. The two rolling elements correspond to two adjacent steel pipe sections, as shown below. Figure 8 and Figure 9 As shown; the axial direction of the rolling element 4 is arranged along the axial direction of the main body 1, and the radial direction of the rolling element 4 is arranged along the length direction of the telescopic support 2. During the seam adjustment, the rolling element 4 contacts the inner wall of the steel pipe section 5, allowing the entire steel pipe section rounding device to roll circumferentially along the inner wall of the steel pipe section 5 during seam pressing, thus giving the steel pipe section rounding device two rotational degrees of freedom relative to the two steel pipe sections that need to be seamed to form a staggered seam.

[0070] like Figure 4As shown, the end of the retractable support is connected to the longitudinal center of the main beam 31. The rolling elements on the retractable support are symmetrically arranged relative to the retractable support, which can make the force uniform and the ability to adapt to deformation better.

[0071] In optional implementations, such as Figure 3 and Figure 4 As shown, the main beam 31 is provided with a rolling cavity 32 corresponding to each rolling element. The rolling element 4 is rotatably disposed within the rolling cavity 32, and the rolling element 4 protrudes from the side of the main beam 31 away from the main body 1. Figure 4 In this configuration, the rolling element 4 can rotate in the vertical direction. By embedding the rolling element 4, the rolling process of the rolling element 4 becomes more stable.

[0072] In optional embodiments, the rolling element is a bearing, roller, or track; a ball joint may also be used, such as... Figure 4 As shown, the rolling element is a roller, so as to... Figure 6 For example, the roller can roll along the circumferential direction of the steel pipe section on the inner wall of the steel pipe section.

[0073] In optional implementations, such as Figure 4 and Figure 5 As shown, both ends of the pressure rod 3 are provided with tapered guide slopes 312 on the side away from the main body 1. The guide slopes 312 are set at an acute angle to the first axis of the main body 1, and are used for guiding and positioning when two adjacent steel pipe sections 5 are connected. The guide slopes 312 also facilitate the guidance when the steel pipe section rounding device is installed inside the steel pipe section 5, and facilitate the guidance when the steel pipe section 5 is installed outside the steel pipe section rounding device. Figure 8 The vertical guidance system makes installation more convenient and faster.

[0074] In optional implementations, such as Figures 5-9 As shown, since the inner side of the steel pipe section 5 ultimately contacts the rolling element 4, and the arrangement of the rolling element 4 will affect the guidance of the transition slope 41 of the steel pipe section rounding device, such as... Figure 4 and Figure 9 As shown, a transition slope 41 is provided between the guide slope 312 and the adjacent rolling element 4. The angle of the transition slope 41 is the same as that of the guide slope 312. One side of the transition slope 41 is adjacent to one side of the guide slope 312, with a gap between them to avoid affecting the rotation of the rolling element. The other side of the transition slope 41 is adjacent to the outer surface of the rolling element 4, so that when... Figure 9 When the roller is guided up and down, it can smoothly transition from the guide slope 312 to the transition slope 41, and then from the transition slope 41 to the outer surface of the roller 4, thus overcoming the influence of the roller 4 setting on the guiding effect.

[0075] More preferably, the transition slope 41 is symmetrically arranged on the side of the rolling element 4 adjacent to the guide slope 312, which facilitates processing and the transition from the guide slope 312 to the rolling element 4 during guidance. Figure 9 As shown, the transition slope 41 is symmetrically arranged at both ends of the rolling element 4 to ensure the symmetry of the rolling element 4 and reduce the impact on rolling.

[0076] In optional implementations, such as Figure 9 As shown, the angle between the guide slope 312 and the first axis of the main body 1 is less than or equal to 45°, to avoid the radial range from widening during the guiding process due to an excessively large angle, thereby improving the guiding effect. Figure 9 As shown, the radial range refers to the horizontal transverse range, that is, the range between the guide slope 312 and the inner side of the steel pipe section 5.

[0077] In an optional embodiment, the retractable support is equipped with a sensor that collects the retractable dimension data of the retractable support to guide the adjustment dimension of each retractable support. The collected data can be used to adjust the adjustment dimension of each retractable support in real time, making the adjustment dimension more accurate.

[0078] In an optional embodiment, the telescopic support is rotatable in the first circumferential direction, allowing control of the pressure rod to move circumferentially along the steel pipe section, completing the pressing of all weld seams and resulting in a better pressing effect. For example... Figure 12 and Figure 13 As shown, the main body 1 has a central circular structure, and a rotating mechanism 12 is fitted around the outer side of the circular structure. The rotating mechanism 12 can be a rotating support, a gear ring, or a gear, etc. If the circular structure remains stationary, the rotating mechanism 12 can rotate circumferentially around the circular structure. The extension section 11 is fixed to the rotating mechanism 12, and the telescopic support 2 is fixed to the extension section 11. The rolling element 4 on the side of the telescopic support 2 away from the main body contacts the inner wall of the steel pipe section 5, allowing the rotating mechanism 12, the extension section 11, the telescopic support 2, and the pressure rod 3 to rotate circumferentially around the circular structure, completing one revolution of the steel pipe section and thus one revolution of seam pressing. Alternatively, the rotating mechanism 12 can drive the circular structure to rotate circumferentially, meaning the entire steel pipe section rounding device can rotate one revolution of the steel pipe section and complete one revolution of seam pressing. This rotation control method can be achieved using a motor drive.

[0079] Because a circumferential weld is formed after the butt joint of two adjacent steel pipe sections is pressed, when welding the inner circumferential weld 51 of the two adjacent steel pipe sections, the inner circumferential weld 51 cannot be welded at the blocked part due to the obstruction of the pressure rod. Figure 14As shown; in an optional embodiment, the pressure rod is rotatable relative to the main body in a first axial direction, and the rotation of the pressure rod relative to the main body in the first axial direction is as follows: Figure 15 As shown, this allows for the avoidance of welding space, thus enabling the welding of the inner circumferential weld. Specifically, as... Figure 15 As shown, the end of the extension section 11 and the end of the telescopic support 2 are hinged by a hinge shaft 112. The hinge shaft 112 is connected to the telescopic support 2 along its length and the first axial direction of the main body 1. Figure 15 The vertical direction is perpendicular to the main body, allowing the telescopic support 2, carrying the pressure rod 3, to move along the first axial direction of the main body. Figure 15 Rotate downwards or upwards to clear welding space, thus enabling the welding of the inner circumferential weld. Of course, Figure 15 The example given is simply a structure with an extended section 11. The main structure, the number of telescopic supports 2, and their circumferential arrangement angle can all be adjusted. It is only necessary that the telescopic supports 2 can rotate along the first axis of the main body with the pressure rod 3 to avoid the welding space. The rotation of the hinge shaft 112 can be controlled by a motor.

[0080] The steel pipe section rounding device provided in this embodiment, due to the multiple sets of circumferentially arranged pressure rods 3, eliminates the need for auxiliary operations such as welding and pressing when butt-jointing two steel pipe sections 5. This saves a significant amount of manual welding and pressing work, effectively reducing labor intensity and construction costs, and improving construction efficiency. Furthermore, the pressure rods 3 are equipped with two rolling elements 4, allowing the steel pipe section 5 to rotate circumferentially relative to the rolling elements 4 during pressing. This means the steel pipe section rounding device has two rotational degrees of freedom relative to the two steel pipe sections requiring a staggered joint. The deformation of the steel pipe section 5 allows the support point supported by the rolling elements 4 to move, thereby adjusting the position to match the deformation of the steel pipe section 5, making the rounding adjustment more accurate and avoiding local deviations due to inability to adjust. Additionally, the pressure rods 3 are equipped with a guide slope 312, and the rolling elements 4 are equipped with a transition slope 41, which can serve as guide surfaces during pipe butt jointing, facilitating the guiding and butt jointing of the pipe ends. This method of setting two rolling elements 4 on the working surface of the pressure rod 3 allows for independent rolling relative to the two adjacent steel pipe sections, as the two rolling elements 4 are axially aligned and each supports one of the two adjacent steel pipe sections. Even if one rolling element on the pressure rod 3 is pressed against the inner wall of the corresponding steel pipe section, it will not affect the adjustment of the inner wall of the other rolling element. For example, during seam pressing, the other steel pipe section can still rotate circumferentially relative to the rolling element. That is, the deformation of the other steel pipe section causes the support point supported by the rolling element to move, thereby adjusting the position to match the deformation of the other steel pipe section. This makes the seam pressing and rounding adjustment more accurate and avoids local deviations due to the inability to adjust. It allows for a wider range of adjustment and prevents the steel pipe section rounding device from being unable to effectively adjust the other steel pipe section when one rolling element is pressed against the inner wall of the corresponding steel pipe section.

[0081] The steel pipe section rounding device can also be used in combination in multiple sets as a temporary internal support for the steel pipe section 5, thereby preventing deformation of the steel pipe section 5 during transportation and installation.

[0082] Example 2

[0083] A method for pressing and sealing steel pipe sections together includes the following steps:

[0084] S1. The steel pipe section rounding device described in Example 1 is set inside the adjacent ends of adjacent steel pipe sections 5, such that the two rolling elements 4 of the pressure rod 3 are respectively set inside the adjacent ends of adjacent steel pipe sections 5, as follows. Figures 5-9 As shown;

[0085] In an optional implementation, in S1, when adjacent steel pipe sections 5 have misaligned edges due to different circumferences, a shim 6 is provided between the inner wall of the pipe section with the larger circumference and the corresponding rolling element 4 to eliminate the misalignment gap and facilitate the rounding of the pipe opening. Figures 10-11 As shown;

[0086] S2. Through the extension and retraction of the telescopic support 2 of the steel pipe section rounding device, the two rolling elements 4 of each pressure rod 3 abut against the inner sides of the adjacent ends of two adjacent steel pipe sections 5, thereby causing the adjacent steel pipe sections 5 to deform or rotate and change the abutment position of the rolling elements 4, until all rolling elements 4 abut against the corresponding circumferentially divided points of the steel pipe sections 5, and the circumferentially divided point pressing is completed. Since the two rolling elements 4 of each pressure rod 3 abut against the inner sides of the adjacent ends of two adjacent steel pipe sections 5, the supported parts of the adjacent steel pipe sections 5 will undergo small deformation (micro-deformation) or small rotation (micro-rotation), thereby enabling the supported parts of the adjacent steel pipe sections 5 to correspond in radial position. Furthermore, when the telescopic support 2 of the steel pipe section rounding device cannot achieve the pressing purpose with one extension and retraction, the supported points of the steel pipe sections can be repeatedly compressed to cause micro-deformation and movement until the pressing requirements are met.

[0087] The number of circumferentially divided points of the steel pipe section 5 corresponds to the number of telescopic supports 2.

[0088] During the seam pressing process, one method involves first using a set of symmetrically arranged telescopic supports to push the pressure rods out and press them against the inner wall of the steel pipe section at the pipe opening, pre-tightening the opening to the required size. Then, another set of symmetrically arranged telescopic supports, perpendicular to this set, is used to push the pressure rods again, adjusting the pipe opening size to the required level. Finally, the remaining telescopic supports are extended to the desired position. Another method involves extending all telescopic supports simultaneously to push the pressure rods to the required size, completing the seam pressing and alignment, and achieving the ideal welding state for the weld.

[0089] When adopting such Figures 11-15 The steel pipe section rounding device shown may include S3, which controls the pressure rod to move circumferentially along the steel pipe section through the rotation mechanism to complete the pressing of all welds, resulting in a better pressing effect.

[0090] Using the above-mentioned method of pressing and sealing steel pipe sections, since the pressure rod is equipped with two rolling elements, and the two rolling elements of the pressure rod abut against the inner side of the adjacent ends of two adjacent steel pipe sections, each rolling element has one degree of rotational freedom relative to the corresponding steel pipe section. That is, the steel pipe section rounding device has two degrees of rotational freedom relative to the two steel pipe sections that need to be pressed to form a staggered joint. During the pressing and sealing adjustment, through the repeated expansion and contraction of the telescopic support of the steel pipe section rounding device, both the steel pipe section rounding device and the steel pipe section can rotate slightly relative to the first circumference of the main body. This allows it to automatically adapt to the deformation of the steel pipe section during rounding, preventing the rounding device from getting stuck during rounding. This makes the rounding operation easier and more accurate, and allows the pressure rod 3 to be supported on the circumferentially divided points of the adjacent steel pipe sections 5, thereby making the connection of the adjacent steel pipe sections 5 more accurate and facilitating subsequent welding.

[0091] The steel pipe section rounding device provided in this embodiment can be applied to the seam pressing of steel pipe sections 5 in horizontal, inclined, or vertical shaft sections. In use, the telescopic support 2 can be fixed at the pipe opening position of the installed steel pipe section 5. Half of the pressure rod 3 is located inside the end of the installed steel pipe section 5, and the other half is located outside the pipe opening, facilitating the guidance and positioning of the next steel pipe section 5 to be installed via the guide ramp 312 and transition ramp 41. When the next steel pipe section 5 is transported or hoisted into place, it is guided and aligned using the guide ramp 312 on the pressure rod 3 and the transition ramp 41 on the rolling element 4.

[0092] Since neither the unconnected end of the steel pipe section 5 to be installed nor the end of the already installed steel pipe section 5 has been adjusted for seam compression, the steel pipe section 5 to be installed may have local dimensions that are too large or too small due to circumferential deformation. The smaller dimensions will be blocked by the working surface of the rolling element 4 of the pressure rod 3 and cannot be guided. Therefore, it is necessary to shorten the telescopic support 2 corresponding to the pressure rod 3 and keep the pressure rod 3 that does not block the steel pipe section 5 to be installed stationary, so that the pipe section 5 to be installed contacts the pipe opening of the already installed steel pipe section 5. Then, the telescopic support 2 corresponding to the pressure rod 3 is extended again to adjust the seam compression, so that each set of pressure rods 3 contacts the inner wall of the steel pipe section 5. The pipe openings of the two steel pipe sections 5 deform and rotate circumferentially upward relative to their respective rolling elements 4, so that the pressure rods 3 can be supported on the circumferentially divided points of the adjacent steel pipe sections 5, thereby making the connection of the adjacent steel pipe sections 5 more accurate. Because the pressure rod 3 is equipped with two rolling elements 4, the entire steel pipe section rounding device can rotate circumferentially with the steel pipe section 5 during the seam adjustment operation. This allows it to adapt to the deformation of the steel pipe section 5, facilitating the seam adjustment between the steel pipe sections 5. It also prevents the pressure rod 3 from becoming stuck on the inner wall of the steel pipe section 5 due to its inability to roll, which would prevent the pressure rod 3 from being supported at the circumferentially divided points of adjacent steel pipe sections 5. Consequently, it would prevent two adjacent steel pipe sections 5 from being connected at the divided points.

[0093] When this steel pipe section rounding device is used in inclined or vertical shaft sections, it can be fixed in advance at the top opening of the first steel pipe section 5 to be installed, and hoisted or transported together with the first steel pipe section 5 to the installation position of the steel pipe section 5. After the next steel pipe section 5 is hoisted, installed and welded, the telescopic support 2 of the device is retracted and adjusted to the top opening position of the steel pipe section 5 and fixed, waiting to be connected and pressed with the bottom opening of the next steel pipe section 5.

[0094] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of press-seaming of a pipe joint of a steel pipe characterized by, A steel pipe joint roundness adjusting device is adopted, and the steel pipe joint roundness adjusting device comprises: a main body having a first axial direction, a first circumferential direction around the first axial direction, and a first radial direction corresponding to the first circumferential direction; a plurality of telescopic supports, all of which are uniformly distributed along the first circumferential direction of the main body, are arranged along the first radial direction of the main body, one end of each telescopic support is fixed to the main body, and the telescopic supports can be telescopically adjusted along the first radial direction of the main body; a plurality of pressing rods are arranged along the first axial direction of the main body, the longitudinal middle part of each pressing rod is fixedly arranged at the end of the corresponding telescopic support, and the side of each pressing rod away from the main body is respectively provided with a rolling element corresponding to the two sides of the telescopic support in the first axial direction, the two rolling elements corresponding to each pressing rod are respectively used for supporting the inner side of two adjacent steel pipe joints to be connected, so that each rolling element has one degree of rotational freedom relative to the corresponding steel pipe joint, and the rolling elements can roll along the first circumferential direction; a steel pipe joint abutting and pressing method comprises the following steps: S1, the steel pipe joint roundness adjusting device is arranged at the inner side of the adjacent ends of the adjacent steel pipe joints, so that the two rolling elements of the pressing rod are arranged at the inner side of the adjacent ends of the adjacent steel pipe joints; S2, the telescopic supports are telescopically adjusted, so that the two rolling elements of each pressing rod abut against the inner side of the adjacent ends of the adjacent steel pipe joints, and the adjacent steel pipe joints are deformed or rotated to change the abutting position of the rolling elements until all the rolling elements abut against the circumferential equidivision points of the corresponding steel pipe joints, and the equidivision point pressing is completed; During the pressing, one way is to first push the pressing rod by a group of mutually symmetrical telescopic supports, so that the pressing rod is extruded and pressed against the inner wall of the steel pipe joint, the pipe opening is pre-tightened to the required size, another group of mutually symmetrical telescopic supports arranged perpendicularly to the group are used to adjust the size of the pipe opening to the required size, and finally the remaining telescopic supports are extruded to the position of the required size; another way is that all the telescopic supports are simultaneously extruded to extrude the pressing rod to the required size, and the abutting and pressing adjustment of the girth joint is completed.

2. A method of pressing a joint between pipe sections of a steel pipe according to claim 1, characterized in that, The end of the telescopic support is connected to the longitudinal center of the pressing rod, and the rolling elements on the telescopic support are symmetrically arranged relative to the telescopic support.

3. A method of pressing a joint between pipe sections according to claim 1, characterized in that The pressing rod is provided with a rolling cavity corresponding to each rolling element, the rolling element is rolling arranged in the rolling cavity, and the rolling element protrudes from the side of the pressing rod away from the main body.

4. A method of pressing a joint between pipe sections according to claim 1, characterized in that The rolling element is a bearing, a roller or a track.

5. A method of pressing a joint between pipe sections according to claim 1, characterized in that The pressing rod can rotate relative to the main body in the first axial direction.

6. A method of pressing a joint between pipe sections of a steel pipe according to claim 1, characterized in that, The telescopic support can rotate in the first circumferential direction.

7. A method of pressing a joint between pipe sections of a steel pipe according to claim 1, characterized in that, The pressing rod is provided with a guide inclined surface at the side away from the main body, and the guide inclined surface is arranged at an acute angle with the first axial direction of the main body.

8. A method of pressing a joint between pipe sections of a steel pipe according to claim 7, characterized in that, The transition slope is provided between the guide slope and the rolling member of the adjacent side, the angle of the transition slope is same as the guide slope, one side of the transition slope is adjacent to one side of the guide slope, and the other side of the transition slope is adjacent to the outer surface of the rolling member; the transition slope is provided at one end of the rolling member adjacent to the transition slope, or the transition slope is symmetrically provided at both ends of the rolling member.

9. The method of claim 1 8. The method of claim 1, wherein the pipe sections are steel pipe sections. The main body comprises an elongated section provided along a first radial direction of the main body, and the telescopic supports are connected to the ends of the elongated section; And / or, the telescopic supports are provided with sensors; the sensors collect the telescopic size data of the telescopic supports, and the collected telescopic size data are used to guide the adjustment of the size of each telescopic support.

10. A method of pressing a joint between pipe sections of a steel pipe according to claim 1, characterized in that, In S1, when the adjacent steel pipe section pipe orifice has a misalignment due to different circumferences, a gasket is arranged between the inner wall of the steel pipe section pipe orifice with a larger circumference and the corresponding rolling member.

11. A method of pressing a joint between pipe sections of a steel pipe according to claim 1, characterized in that, Further comprising S3, the control pressure rod moves along the circumference of the steel pipe section to complete the pressing of the welds.

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