Steel pipe joint butt-assembling and seam-pressing method and steel pipe joint roundness adjusting device

Abstract

The invention relates to the field of steel pipe installation, in particular to a steel pipe joint butt-assembling seam pressing method and a steel pipe joint roundness adjusting device.A plurality of telescopic supports are evenly distributed in the first circumferential direction of a main body to provide radial support, and pressing rods are arranged at the tail ends of the corresponding telescopic supports, so that all the pressing rods are evenly distributed in the first circumferential direction of the main body; the two rolling pieces are arranged on the side, away from the main body, of the pressing rod in a rolling mode, so that the pressing rod can be supported on the inner sides of butt joints of two adjacent steel pipe sections through the two rolling pieces in the seam pressing process, and the steel pipe section roundness adjusting device has two rotation freedom degrees relative to the two steel pipe sections needing seam pressing to form staggered seams. Due to deformation of the end portions of the steel pipe joints, the steel pipe joints can slightly move in the first circumferential direction of the main body relative to the corresponding rolling pieces, the rolling pieces can be supported on circumferential equal division points of the adjacent steel pipe joints, the equal division points of the adjacent steel pipe joints are in one-to-one correspondence through the pressing rods, and the adjacent steel pipe joints are in butt joint accurately.

Description

Technical Field

[0001] The invention relates to the field of steel pipe installation, and in particular to a steel pipe segment installation and seam pressing method and a steel pipe segment rounding device. Background Art

[0002] During the installation of penstocks in domestic hydropower stations, the usual practice for on-site circumferential seam compression of pipe segments is to weld compression weights or seven-shaped bends on the inner or outer wall of the pipe segment, and use wedges or jacks to adjust the circumferential seam misalignment of the segment.

[0003] The traditional method of pressing the circumferential seam of the pipe joint may bring quality risks to the pipe joint base material. This is mainly because when welding the pressing code or the seven-shaped bend, the pressing code needs to be preheated before welding, and the interlayer temperature and line energy need to be controlled during welding, which requires a large amount of manual welding. In addition, the use of traditional jacks for rounding adjustment has problems such as many adjustments, inaccurate adjustment accuracy, and easy slipping of the jack. Multiple manual operations are required to complete the final rounding construction, resulting in extremely low work efficiency and high construction safety risks.

[0004] At present, there are also some public technologies that use "M"-shaped supports combined with hydraulics to adjust the circle. Compared with the manual jack method, the construction efficiency is improved and the safety risk is reduced. Compared with the traditional manual jack method, the M-shaped support can solve the problems of low efficiency and high safety risks. However, it does not have a guiding docking function. When used in a vertical shaft, it is difficult to guide and position. For example, the Chinese invention patent application with publication number CN118933794A discloses an automated operation platform and method for using large-diameter high-strength steel pipe sections for deep vertical shafts. It discloses: the chain electric hoist lowers one end of the press seam operation plate to drive the rotary table to rotate, so that the first hydraulic cylinder is adjusted to the staggered position between the steel pipe section and the previous steel pipe section, and the second hydraulic cylinder is driven to extend the belt After the dynamic support shoe is tightened to the inner wall of the steel pipe section, the first hydraulic cylinder is driven to extend and then slowly push the pipe wall (the steel pipe section) at the staggered position until the staggered adjustment is completed. In this staggered adjustment method, the first hydraulic cylinder pushes the upper and lower steel pipe section walls at the staggered position. Once they are tightened against the inner wall of the steel pipe section, they cannot be rotated and adjusted due to the large friction. The diameter of the steel pipe section is large, the steel pipe section port cannot be guaranteed to be circular, and the diameters of adjacent steel pipe sections have a certain difference within the error range. As a result, the compression seam support cannot be supported on the circumference equal division points of the adjacent steel pipe sections, resulting in the pipe mouth possibly being locally adjusted and deformed too much and inaccurate docking. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings in the prior art that the diameter of the steel pipe section is large, the steel pipe section port cannot be guaranteed to be circular, and the diameters of adjacent steel pipe sections have certain differences within the error range, and thus the compression seam support cannot be supported on the circumference equal division points of the adjacent steel pipe sections, resulting in the pipe mouth possibly being locally adjusted and deformed too much and the docking being inaccurate. A method for assembling and compression seaming of steel pipe sections and a device for adjusting the circularity of steel pipe sections are provided.

[0006] In a first aspect, the present invention provides a steel pipe segment rounding device, comprising: a main body having a first axial direction, a first circumferential direction surrounding the first axial direction, and a first radial direction corresponding to the first circumferential direction; a plurality of retractable supports, all of the retractable supports being evenly distributed along the first circumferential outer side of the main body, the retractable supports being arranged along a first radial direction of the main body, one end of the retractable support being fixed to the main body, and the retractable support being capable of retracting along the first radial direction of the main body; Multiple pressure rods are arranged along the first axial direction of the main body, and the longitudinal middle part of the pressure rod is fixedly arranged at the end corresponding to the telescopic support. The pressure rod is away from the side of the main body and corresponding to the telescopic support. Rolling members are respectively provided on both sides of the first axial direction, and the rolling members can roll along the first circumferential direction.

[0007] Among them, the first axial direction of the main body corresponds to the axial direction of the steel pipe segment that needs to be rounded, the first circumferential direction of the main body corresponds to the circumferential direction of the steel pipe segment that needs to be rounded, and the first radial direction of the main body corresponds to the radial direction of the steel pipe segment that needs to be rounded.

[0008] The steel pipe section circular adjustment device described in the present invention has a main body that provides radial support for multiple telescopic supports, and a pressure rod is arranged at the end corresponding to the telescopic support, that is, it is evenly distributed in the first circumferential direction of the main body, and two rolling members are provided by rolling on the side of the pressure rod away from the main body, and the two rolling members are located on both sides of the first axial direction of the telescopic support, so that when pressing the seam, the two rolling members can respectively support the inner side of the butt seam of two adjacent steel pipe sections, so that each rolling member has a rotational freedom relative to the corresponding steel pipe section, that is, the steel pipe section circular adjustment device has two rotational freedoms relative to the two steel pipe sections that need to be pressed to form a staggered seam, and when the telescopic support is extended so that the two rolling members respectively abut the inner side of the butt seam of the two adjacent steel pipe sections, due to the deformation of the end of the steel pipe section, the steel pipe section can move slightly relative to the rolling member in the first circumferential direction of the main body, so that the rolling member can be supported on the circumferential equal division points of the adjacent steel pipe sections, and the equal division points of the adjacent steel pipe sections are corresponded one by one by the pressure rod, so that the adjacent steel pipe sections are accurately butted, which is convenient for subsequent welding.

[0009] Preferably, the end of the telescopic support is connected to the longitudinal center of the pressure rod, and the rolling element on the telescopic support is symmetrically arranged relative to the telescopic support, which can make the force uniform and better adapt to deformation.

[0010] Preferably, the pressure rod is provided with a rolling cavity corresponding to each rolling element, the rolling element is rollingly arranged in the rolling cavity, and the rolling element protrudes from a side surface of the pressure rod away from the main body.

[0011] The rolling element is arranged in an embedded manner, so that the rolling process of the rolling element is more stable.

[0012] Preferably, the rolling element is a bearing, a roller or a track.

[0013] Preferably, the pressure rod can rotate relative to the main body in the first axial direction. After the pressing seam of the butt ends of two adjacent steel pipe sections is completed, an annular weld is formed. When welding the inner annular welds of the two adjacent steel pipe sections, the pressure rod can be rotated relative to the main body in the first axial direction to avoid welding space, thereby completing the welding of the inner annular weld.

[0014] Preferably, the telescopic support can rotate in a first circumferential direction, so that the compression rod can be controlled to move circumferentially along the steel pipe section, completing the compression of all welds, resulting in a better compression effect.

[0015] Preferably, a guide slope is provided on one side of both ends of the pressure rod away from the main body, and the guide slope is arranged at an acute angle to the first axial direction of the main body.

[0016] The guiding bevel enables the steel pipe segment rounding device to be guided when installed on the inner side of the steel pipe segment, and facilitates the guidance of the steel pipe segment when installed on the outer side of the steel pipe segment rounding device, making installation more convenient and quick.

[0017] Preferably, a transition slope is provided between the guide slope and the rolling element on the adjacent side, 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.

[0018] Since the inner side of the steel pipe section will eventually come into contact with 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, a transition slope is provided between the guide slope and the rolling element on the adjacent side, 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, which can overcome the influence of the rolling element setting on the guiding effect.

[0019] Preferably, the transition slope is provided at one end of the rolling element adjacent to the transition slope, which is convenient for processing and facilitates the transition from the guide slope to the rolling element during guiding.

[0020] Preferably, the transition bevel is symmetrically arranged at both ends of the rolling element. Setting the transition bevel at both ends of the rolling element ensures the symmetry of the rolling element, reduces the impact on rolling, is conducive to processing, and is conducive to the transition from the guide bevel to the rolling element during guidance.

[0021] Preferably, the included angle between the guiding inclined surface and the first axial direction of the main body is less than or equal to 45°, so as to avoid the radial range becoming wider during the guiding process due to an excessively large angle, thereby improving the guiding effect.

[0022] Preferably, the middle structure of the main body is cylindrical or prismatic, which facilitates the uniform arrangement of multiple retractable supports and provides balanced force.

[0023] 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 corresponding end of the extension section. Since the total length of the telescopic support is generally limited, by setting the extension section, it can adapt to the installation and compression seams of steel pipe sections with larger diameters. At the same time, when used for the installation and compression seams of steel pipe sections of the same diameter, a telescopic support with a smaller length adjustment range can be selected, which can save costs.

[0024] Preferably, the retractable support is provided with a sensor, which collects the telescopic size data of the retractable support. The collected telescopic size data is used to guide the circle adjustment size of each retractable support. The circle adjustment size of each retractable support can be adjusted in real time through the collected data, making the circle adjustment size more accurate.

[0025] In a second aspect, the present invention provides a method for assembling and pressing a steel pipe section, which adopts a steel pipe section rounding device, the steel pipe section rounding device comprising: a main body, a plurality of retractable supports and a pressure rod corresponding to the retractable supports; all the retractable supports are evenly distributed along the circumferential inner side of the steel pipe section, the retractable supports are arranged radially along the steel pipe section, one end of the retractable support is fixed to the main body, and the other end is fixed with the pressure rod, the retractable support can be retracted and contracted along the radial direction of the steel pipe section to drive the pressure rod to move radially along the steel pipe section, the pressure rod is arranged axially along the steel pipe section, the longitudinal middle portion of the pressure rod is fixedly arranged at the end corresponding to the retractable support, the pressure rod is away from the side of the main body and is provided with rolling elements on both sides of the axial direction of the steel pipe section corresponding to the retractable support, and the rolling elements can roll circumferentially along the steel pipe section; The method for installing and pressing the steel pipe joints includes the following steps: S1. Arrange the steel pipe segment rounding device on the inner sides of adjacent ends of adjacent steel pipe segments, so that the two rolling members of the pressure rod are respectively arranged on the inner sides of adjacent ends of adjacent steel pipe segments; S2. By extending and retracting the retractable support, the two rolling elements of each pressure rod respectively abut the inner sides of the adjacent ends of two adjacent steel pipe sections. At the same time, the adjacent steel pipe sections deform or rotate to change the abutting positions of the rolling elements until all the rolling elements abut the circumferential equally divided points of the corresponding steel pipe sections, and the equally divided point press seams are completed.

[0026] The number of equally divided points in the circumferential direction of the steel pipe segment corresponds to the number of telescopic supports.

[0027] The above-mentioned method of pressing seams of steel pipe sections is adopted. Since two rolling members are provided on the pressure rod, the two rolling members of the pressure rod respectively abut against the inner sides of the adjacent ends of two adjacent steel pipe sections, so that each rolling member has one degree of rotational freedom relative to the corresponding steel pipe section, that is, the steel pipe section circle adjustment device has two degrees of rotational freedom relative to the two steel pipe sections that need to be pressed to form staggered seams. When the press seam is adjusted, the steel pipe section circle adjustment device and the steel pipe section can rotate a small amount in the circumferential direction of the steel pipe section through the extension and contraction of the retractable support of the steel pipe section circle adjustment device, so that they can automatically adapt to the deformation of the steel pipe section during circle adjustment, avoid the circle adjustment device from being stuck during circle adjustment, make the circle adjustment operation easier, and make the circle adjustment more accurate, so that the pressure rod can be supported on the circumferential equal division points of adjacent steel pipe sections, thereby making the adjacent steel pipe sections more accurately connected, and facilitating subsequent welding.

[0028] Preferably, in S1, when adjacent steel pipe sections have misaligned edges due to different circumferences, a pad is provided between the inner wall of the steel pipe section with the larger circumference and the corresponding rolling element to eliminate the misaligned gap and facilitate rounding of the pipe ends.

[0029] Preferably, it also includes S3, S3, which controls the pressure rod to move circumferentially along the steel pipe section to complete the compression of all welds, so that the compression effect is better.

[0030] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a steel pipe segment rounding device, which provides radial support by evenly distributing multiple retractable supports on the first circumference of the main body, and a pressure rod is provided at the end corresponding to the retractable support, so that all the pressure rods are evenly distributed on the first circumference of the main body, and a rolling element is provided on the side of the pressure rod away from the main body, and the rolling element is provided at both ends of the pressure rod, so that when the seam is pressed, the rolling elements at both ends of the pressure rod can be respectively supported on the inner side of the butt joint of two adjacent steel pipe segments, so that each rolling element has one degree of rotational freedom relative to the corresponding steel pipe segment, that is, the steel pipe segment The circle adjustment device has two rotational degrees of freedom relative to the two steel pipe sections that need to be pressed to form staggered seams. When the retractable support is extended so that the rolling parts at both ends of the pressure rod respectively abut the inner sides of the butt joints of the two adjacent steel pipe sections, due to the deformation of the ends of the steel pipe sections, the two adjacent steel pipe sections can move slightly relative to the corresponding rolling parts in the first circumferential direction of the main body, thereby enabling the rolling parts to be supported on the circumferential equal-division points of the corresponding steel pipe sections. The equal-division points of the adjacent steel pipe sections are matched one by one through the pressure rod, so that the adjacent steel pipe sections are accurately butted, which is convenient for subsequent welding.

[0031] 2. The present invention provides a method for press-seaming steel pipe sections. Since two rolling members are provided on the pressure rod, the two rolling members of the pressure rod respectively abut against the inner sides of the adjacent ends of two adjacent steel pipe sections, so that each rolling member has one degree of rotational freedom relative to the corresponding steel pipe sections, that is, the steel pipe section circle adjustment device has two degrees of rotational freedom relative to the two steel pipe sections that need to be press-seamed to form staggered seams. When the press-seams are adjusted, the steel pipe section circle adjustment device and the steel pipe section can rotate a small amount in the circumferential direction of the steel pipe section through the extension and retraction of the retractable support of the steel pipe section circle adjustment device, so that they can automatically adapt to the deformation of the steel pipe section during circle adjustment, avoid the circle adjustment device from being stuck during circle adjustment, make the circle adjustment operation easier, and make the circle adjustment more accurate, so that the pressure rod can be supported on the circumferential equal division points of adjacent steel pipe sections, thereby making the adjacent steel pipe sections more accurately connected and convenient for subsequent welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional schematic diagram of the steel pipe segment rounding device; Figure 2 This is a top view of the steel pipe segment rounding device; Figure 3 This is a side view of the steel pipe segment rounding device; Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle circle A; Figure 5 This is a schematic diagram of the steel pipe segment rounding device in use (the upper steel pipe segment is half-sectioned); Figure 6 for Figure 5 A top view of Figure 7 for Figure 5 Front view of Figure 8 for Figure 5 Side view of Figure 9 for Figure 8 A partial enlarged schematic diagram of the middle circle B; Figure 10 This is a schematic diagram of the misaligned press seam caused by the different circumferences of the upper and lower steel pipe sections; Figure 11 for Figure 10 A partial enlarged schematic diagram of the middle circle C; Figure 12 This is a top view of the second type of steel pipe segment rounding device; Figure 13 This is a side view of the second type of steel pipe segment rounding device; Figure 14 This is a schematic diagram of the use status of the third type of steel pipe segment rounding device; Figure 15 This is a schematic diagram of the third type of steel pipe segment rounding device after the pressure rod rotates along the axial direction of the main body.

[0033] Markings in the figure: 1. Main body; 11. Extension section; 112. Hinge shaft; 12. Rotating mechanism; 2. Telescopic support; 3. Pressure rod; 31. Main beam; 312. Guide slope; 32. Rolling cavity; 4. Rolling element; 41. Transition slope; 5. Steel pipe section; 51. Inner annular weld; 6. Pad. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments, as all technologies implemented based on the present invention fall within the scope of the present invention.

[0035] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or positional relationship, such as "upper", "lower", "left", "right", "center", "inside", and "outside", are based on the expressions of the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the invented product / device / apparatus is placed when it is conventionally used. These terms of orientation or positional relationship are merely for the purpose of facilitating the description of the scheme of the present invention or simplifying the description of the specific embodiments to facilitate the rapid understanding of the scheme by technicians, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, and therefore should not be understood as limiting the present invention.

[0036] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present invention.

[0037] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0038] In addition, in the description of the embodiments of the present invention, "several," "plurality," and "a number" represent at least two. It can also be any number such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0039] Furthermore, in the description of the technical solution of the present invention, unless otherwise expressly specified, defined, or limited, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welded, riveted, bolted, threaded, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communicative; they may be direct, indirect via an intermediate medium, or internally connected between two components.

[0040] Example 1 like Figures 1-10 As shown, a steel pipe segment rounding device is mainly used for adjusting the annular seam pressure seam when two steel pipe segments 5 are butt-jointed, comprising: a main body 1, a plurality of telescopic supports 2 and a plurality of pressure rods 3.

[0041] 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; wherein the first axial direction of the main body corresponds to the axial direction of the steel pipe segment to be rounded, the first circumferential direction of the main body corresponds to the circumferential direction of the steel pipe segment to be rounded, and the first radial direction of the main body corresponds to the radial direction of the steel pipe segment to be rounded. The main body 1 is made of profiles, plates, etc., and has an overall annular or cross-shaped structure to adapt to the inner wall of the steel pipe segment. The axial direction of the annular or cross-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 segment to be rounded is the first axial direction.

[0042] In an optional embodiment, the middle structure of the main body 1 is cylindrical or prismatic, which facilitates the uniform arrangement of multiple retractable supports 2 and provides balanced force. Figure 2 As shown, the middle structure of the main body 1 is a quadrangular prism, and correspondingly, four telescopic supports 2 and four pressure rods 3 are provided, that is, each corner of the quadrangular prism is connected to a telescopic support 2 and a pressure rod 3.

[0043] The multiple retractable supports 2 represent at least three groups, and all the retractable supports 2 are evenly distributed along the first circumferential outer side of the main body 1. The retractable supports 2 are arranged along the first radial direction of the main body 1, that is, the retractable supports 2 can be perpendicular to the inner wall of the steel pipe segment. One end of the retractable support 2 is fixed to the main body 1, and the retractable support 2 can be retracted along the first radial direction of the main body 1, and can change the length perpendicular to the inner wall of the steel pipe segment. The retractable supports 2 are arranged circumferentially along the main body 1, and can be made of profiles, steel pipe segments, plates, etc. The retractable supports 2 can be implemented by hydraulic cylinders, jacks, electric push rods, electric screws, etc., and can change the length in the first radial direction of the main body 1. According to the different inner diameters of the steel pipe segments 5, in order to facilitate the transportation of the steel pipe segment circular adjustment device, the circumferentially arranged retractable supports 2 are fixed in a detachable connection manner, and can be removed during transportation to reduce the transportation volume.

[0044] like Figure 1 and Figure 2 As 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, the provision of the extension section 11 can accommodate the jointing of steel pipe sections 5 with larger diameters. At the same time, when used for the jointing 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.

[0045] In this solution, it is best to set two retractable supports 2 on the same diameter to support a diameter. And it is best to form a vertical cross design, such as Figure 6 As shown, the rounding effect is better.

[0046] like Figure 1 and Figure 2 As shown, the main body 1 includes four extension sections 11 arranged in a cross shape, and an oblique support inclined at 45° is connected between two adjacent extension sections 11 of the cross shape. The retractable support 2 is connected to the end of the corresponding extension section 11. The oblique support can ensure that all extension sections 11 form a whole, which can be adapted to the compression seam of steel pipe sections 5 with larger diameters.

[0047] The compression rod 3 includes a main beam 31 and a rolling element 4. The rolling element 4 is arranged on the side of the main beam 31 away from the main body 1. The main beam 31 can be a profile or a plate, and is made by casting or forging. The longitudinal middle part of the main beam 31 is fixedly arranged at the end corresponding to the telescopic support 2. The compression rod 3 is arranged along the first axial direction of the main body 1, that is, the compression rod 3 is parallel to the inner wall of the steel pipe segment and arranged along the axial direction of the steel pipe segment, so as to facilitate the compression seam adjustment of the annular seam between the two steel pipe segments. The compression rod 3 is provided with two rolling elements 4 on the side away from the main body 1. Figure 3 and Figure 4 As shown, the two rolling members are located on both sides of the telescopic support in the first axial direction, or at the longitudinal ends of the pressure rod 3, and the two rolling members correspond to two adjacent steel pipe sections, such as 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. The rolling element 4 contacts the inner wall of the steel pipe segment 5 during the seam pressing adjustment, so that the entire steel pipe segment rounding device can roll along the inner wall of the steel pipe segment 5 during the seam pressing. In other words, the steel pipe segment rounding device has two rotational degrees of freedom relative to the two steel pipe segments that need to be pressed to form a staggered seam.

[0048] like Figure 4 As shown, the end of the telescopic support is connected to the longitudinal center of the main beam 31, and the rolling elements on the telescopic support are symmetrically arranged relative to the telescopic support, which can make the force uniform and better adapt to deformation.

[0049] In an optional embodiment, if Figure 3 and Figure 4 As shown, the main beam 31 is provided with a rolling cavity 32 corresponding to each rolling element, and the rolling element 4 is rollingly arranged in 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 the embodiment, the rolling element 4 can rotate in the up and down directions. The rolling element 4 is arranged in an embedded manner, so that the rolling process of the rolling element 4 is more stable.

[0050] In an optional embodiment, the rolling element is a bearing, a roller or a track, and a ball joint can also be used, such as Figure 4 As shown, the rolling element is a roller. Figure 6 For example, the roller can roll along the circumferential direction of the steel pipe segment on the inner wall of the steel pipe segment.

[0051] In an optional embodiment, if Figure 4 and Figure 5 As shown, both ends of the pressure rod 3 are provided with a conical guiding slope 312 on one side away from the main body 1. The guiding slope 312 is set at an acute angle to the first axial direction of the main body 1, and is used for guiding and positioning when two adjacent steel pipe sections 5 are docked. The guiding slope 312 enables the steel pipe section rounding device to be guided when installed on the inner side of the steel pipe section 5, and facilitates the guidance when the steel pipe section 5 is installed on the outer side of the steel pipe section rounding device. Figure 8 In the vertical direction, it realizes the vertical guidance, making the installation more convenient and quick.

[0052] In an optional embodiment, if Figure 5-Figure 9 As shown, since the inner side of the steel pipe segment 5 is finally in contact with the rolling element 4, the setting of the rolling element 4 will affect the guidance of the transition slope 41 of the steel pipe segment rounding device, as shown in FIG. Figure 4 and Figure 9 As shown, a transition slope 41 is provided between the guide slope 312 and the rolling element 4 on the adjacent side. 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. There is a gap between the two 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 Figure 9 When guiding up and down, it can smoothly transition from the guiding slope 312 to the transition slope 41, and then transition from the transition slope 41 to the outer surface of the rolling element 4, which can overcome the influence of the setting of the rolling element 4 on the guiding effect.

[0053] Further preferably, the transition slope 41 is symmetrically arranged on the side of the rolling element 4 adjacent to the guide slope 312, which is convenient for processing and convenient for transitioning from the guide slope 312 to the rolling element 4 during guidance. Figure 9 As shown, the transition slopes 41 are 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.

[0054] In an optional embodiment, if Figure 9 As shown, the included angle between the guiding slope 312 and the first axial direction of the main body 1 is less than or equal to 45°, so as to avoid the radial range becoming wider during the guiding process due to the angle being too large, thereby improving the guiding effect. Figure 9As 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 segment 5.

[0055] In an optional embodiment, the retractable support is provided with a sensor, which collects the telescopic size data of the retractable support and is used to guide the circle adjustment size of each retractable support. The circle adjustment size of each retractable support can be adjusted in real time through the collected data, making the circle adjustment size more accurate.

[0056] In an optional embodiment, the retractable support can rotate in the first circumferential direction, so that the compression rod can be controlled to move along the circumferential direction of the steel pipe section to complete the compression of all welds, so that the compression effect is better. Figure 12 and Figure 13 As shown, the main body 1 has a circular ring structure in the middle, and a rotating mechanism 12 is provided on the outer side of the circular ring structure. The rotating mechanism 12 can be a rotating support, a gear ring or a gear, etc. If the circular structure is stationary, the rotating mechanism 12 can rotate circumferentially around the circular structure, and 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, so that the rotating mechanism 12, the extension section 11, the telescopic support 2 and the pressure rod 3 can rotate circumferentially of the circular ring structure as a whole, and can rotate one circle in the circumference of the steel pipe section to complete one circle of compression seam. Of course, the rotating mechanism 12 can also drive the circular structure to rotate circumferentially, that is, the entire steel pipe section circular adjustment device can rotate one circle in the circumference of the steel pipe section to complete one circle of compression seam. This rotation control method can be driven by a motor.

[0057] Since an annular weld is formed after the butt joints of the two adjacent steel pipe sections are pressed together, when the inner annular welds 51 of the two adjacent steel pipe sections are welded, the inner annular welds 51 at the blocked position cannot be welded due to the obstruction of the pressure rod. Figure 14 In an optional embodiment, the pressure rod can rotate relative to the main body in the first axial direction, and the pressure rod rotates relative to the main body in the first axial direction, as shown Figure 15 As shown, the welding space can be avoided, and the welding of the inner annular weld can be completed. Figure 15 As shown, the end of the extension section 11 is hinged to the end of the telescopic support 2 by a hinge shaft 112, and the hinge shaft 112 is connected to the length direction of the telescopic support 2 and the first axial direction of the main body 1 ( Figure 15 The vertical direction in the middle) are vertical, so that the telescopic support 2 with the pressure rod 3 can be moved along the first axial direction of the main body ( Figure 15 The inner annular weld can be completed by rotating the machine downward or upward to avoid the welding space. Figure 15The example here uses the structure with the extension section 11 as an example. The main structure, the number of retractable supports 2, and the circumferential arrangement angle are all adjustable. It is sufficient that the retractable 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.

[0058] The steel pipe segment rounding device provided in this embodiment, due to the provision of multiple sets of circumferentially arranged pressure rods 3, eliminates the need for auxiliary operations such as welding and pressing when two steel pipe segments 5 are butted together and seamed. This eliminates a large amount of manual welding and cutting work, effectively reducing labor intensity and construction costs, and improving construction efficiency. Furthermore, the pressure rods 3 are provided with two rolling elements 4, allowing the steel pipe segment 5 to rotate circumferentially relative to the rolling elements 4 during seaming. This means that the steel pipe segment rounding device has two degrees of rotational freedom relative to the two steel pipe segments to be seamed to form a staggered seam. This means that the deformation of the steel pipe segment 5 allows the support points of the steel pipe segment 5 supported by the rolling elements 4 to move, thereby adjusting the position to accommodate the deformation of the steel pipe segment 5, making seam support rounding more accurate and avoiding local deviations due to inability to adjust. Furthermore, the pressure rods 3 are provided with guide slopes 312, and the rolling elements 4 are provided with transition slopes 41, which serve as guide surfaces when butting the pipe ends, facilitating the guiding and docking of the pipe ends. This method of arranging two rolling members 4 on the working surface of the pressure rod 3 has the same axial direction as the two rolling members 4, and they are respectively used to support two adjacent steel pipe sections, and can roll independently relative to the two adjacent steel pipe sections. Even in the case that one rolling member on the pressure rod 3 is stuck against the inner wall of the corresponding steel pipe section, it will not affect the adjustment of the inner wall of the other steel pipe section by the other rolling member; for example, when pressing the seam, the other steel pipe section can still rotate circumferentially relative to the rolling member, that is, the deformation of the other steel pipe section enables the support point of the steel pipe section supported by the rolling member to move, thereby adjusting the position to adapt to the deformation of the other steel pipe section, making the adjustment of the pressing seam support circle more accurate, avoiding the situation where local deviations exist due to inability to adjust, and making it possible to adapt to a wider range of adjustment, avoiding the situation where the steel pipe section circle adjustment device cannot effectively adjust the pressing seam of the other steel pipe section when one rolling member is stuck against the inner wall of the corresponding steel pipe section.

[0059] The steel pipe segment rounding device can also be used in combination in multiple groups as a temporary internal support for the steel pipe segment 5, thereby preventing the steel pipe segment 5 from being deformed during transportation and installation.

[0060] Example 2 A method for assembling and pressing seams of steel pipe sections comprises the following steps: S1. The steel pipe segment circular adjustment device described in Example 1 is arranged on the inner side of the adjacent ends of the adjacent steel pipe segments 5, so that the two rolling members 4 of the pressure rod 3 are respectively arranged on the inner side of the adjacent ends of the adjacent steel pipe segments 5. Figure 5-Figure 9 As shown; In an optional embodiment, in S1, when the pipe ends of adjacent steel pipe sections 5 are misaligned due to different circumferences, a pad 6 is provided between the inner wall of the pipe end of the steel pipe section with a larger circumference and the corresponding rolling element 4 to eliminate the misalignment gap and facilitate the rounding of the pipe end, such as Figure 10-11 As shown; S2. Through the expansion and contraction of the telescopic support 2 of the steel pipe segment circular adjustment device, the two rolling elements 4 of each pressure rod 3 respectively abut the inner sides of the adjacent ends of the two adjacent steel pipe segments 5, and at the same time, the adjacent steel pipe segments 5 are deformed or rotated to change the abutment position of the rolling elements 4, until all the rolling elements 4 abut on the circumferential equally divided points of the corresponding steel pipe segments 5, and the equally divided point press seams are completed; because the two rolling elements 4 of each pressure rod 3 respectively abut the inner sides of the adjacent ends of the two adjacent steel pipe segments 5, the supported parts of the adjacent steel pipe segments 5 will undergo small deformation (micro-deformation) or small rotation (micro-rotation), thereby enabling the supported parts of the adjacent steel pipe segments 5 to correspond in radial position. And when the purpose of press seams cannot be achieved by a single expansion and contraction of the telescopic support 2 of the steel pipe segment circular adjustment device, the supported points of the steel pipe segments can be micro-deformed and moved by repeated compression until the press seams are achieved.

[0061] The number of equally divided points in the circumferential direction of the steel pipe segment 5 corresponds to the number of the telescopic supports 2 .

[0062] When press-welding, one method is to first use a set of mutually symmetrical retractable supports to push the pressure rod, causing it to extend and squeeze the inner wall of the steel pipe section at the pipe mouth, pre-tightening the pipe mouth to the desired size. Then, another set of mutually symmetrical retractable supports arranged perpendicular to this set push the pressure rod, similarly adjusting the pipe mouth size to the desired size. Finally, the remaining retractable supports are extended to the desired size. Another method is to extend all retractable supports simultaneously to push the pressure rod to the desired size, completing the press-weld adjustment and alignment of the circumferential seam, and achieving the ideal weld state.

[0063] When using Figure 11-Figure 15 The steel pipe segment rounding device shown in the figure can also include S3 due to the provision of a rotary mechanism. S3 controls the pressure rod to move circumferentially along the steel pipe segment through the rotary mechanism to complete the compression of all welds, resulting in a better compression effect.

[0064] The above-mentioned method of pressing and seaming steel pipe sections is adopted. Since two rolling members are provided on the pressure rod, the two rolling members of the pressure rod respectively abut the inner sides of the adjacent ends of the two adjacent steel pipe sections, so that each rolling member has one degree of rotational freedom relative to the corresponding steel pipe section, that is, the steel pipe section circle adjustment device has two degrees of rotational freedom relative to the two steel pipe sections that need to be pressed and seamed to form staggered seams. When the press seam is adjusted, the steel pipe section circle adjustment device and the steel pipe section can rotate a small amount relative to the first circumferential direction of the main body through the repeated expansion and contraction of the retractable support of the steel pipe section circle adjustment device, so that they can automatically adapt to the deformation of the steel pipe section during circle adjustment, avoid the circle adjustment device from being stuck during circle adjustment, make the circle adjustment operation easier, and make the circle adjustment more accurate, so that the pressure rod 3 can be supported on the circumferential equal division points of the adjacent steel pipe sections 5, thereby making the adjacent steel pipe sections 5 docking more accurate, and facilitating subsequent welding.

[0065] The steel pipe segment rounding device provided in this embodiment can be applied to the compression seams of steel pipe segments 5 in horizontal sections, inclined shaft sections, or vertical shaft sections. When in use, the retractable support 2 can be fixed to the pipe end position of the installed steel pipe segment 5, with half of the pressure rod 3 located inside the end of the installed steel pipe segment 5 and the other half located outside the pipe end of the installed steel pipe segment 5, so as to facilitate the guidance and positioning of the next steel pipe segment 5 to be installed through the guide bevel 312 and the transition bevel 41. When the next steel pipe segment 5 to be installed is transported or hoisted into place, it is guided and aligned by the guide bevel 312 provided on the pressure rod 3 and the transition bevel 41 on the rolling element 4.

[0066] Since the unjointed ends of the steel pipe section 5 to be installed and the installed steel pipe section 5 have not been subjected to pressure seam adjustment, due to circumferential deformation, the steel pipe section 5 to be installed may have local dimensions that are too large or too small. The smaller size position 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 steel pipe section 5 to be installed contacts the pipe mouth of the installed steel pipe section 5, and re-extend the telescopic support 2 corresponding to the pressure rod 3 to adjust the pressure seam, so that each group of pressure rods 3 contacts the inner wall of the steel pipe section 5, and the pipe mouths of the two sections of the steel pipe section 5 are deformed and rotate in the circumferential direction of the steel pipe section 5 relative to their respective corresponding rolling elements 4, so that the pressure rod 3 can be supported on the circumferential equal division points of the adjacent steel pipe sections 5, thereby making the docking of the adjacent steel pipe sections 5 more accurate. Since two rolling parts 4 are provided on the pressure rod 3, the entire steel pipe segment circular adjustment device is in a state of circumferential rotation with the steel pipe segment 5 when performing the compression seam adjustment operation, which can adapt to the deformation of the steel pipe segment 5, facilitate the compression seam adjustment between the steel pipe segments 5, and avoid the pressure rod 3 being unable to roll and being stuck on the inner wall of the steel pipe segment 5, which causes the pressure rod 3 to be unable to support on the circumferential equal division point of the adjacent steel pipe segment 5, and further makes it impossible for the adjacent two steel pipe segments 5 to be connected at the equal division point.

[0067] When the steel pipe segment rounding device is used in an inclined shaft section or a vertical shaft section, the device can be fixed in advance to the top pipe mouth of the first steel pipe segment 5 to be installed, and hoisted or transported to the installation position of the steel pipe segment 5 together with the first steel pipe segment 5 to be installed. After the next steel pipe segment 5 is hoisted into place and installed and welded, the telescopic support 2 of the device is retracted and adjusted to the top pipe mouth position of the steel pipe segment 5, waiting to be docked and pressed with the bottom pipe mouth of the next steel pipe segment 5.

[0068] The above description is only 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 in the scope of protection of the present invention.

Claims

1. A steel pipe segment rounding device, characterized in that: include: a main body having a first axial direction, a first circumferential direction surrounding the first axial direction, and a first radial direction corresponding to the first circumferential direction; a plurality of retractable supports, all of the retractable supports being evenly distributed along the first circumferential outer side of the main body, the retractable supports being arranged along a first radial direction of the main body, one end of the retractable support being fixed to the main body, and the retractable support being capable of retracting along the first radial direction of the main body; Multiple pressure rods are arranged along the first axial direction of the main body, and the longitudinal middle part of the pressure rod is fixedly arranged at the end corresponding to the telescopic support. The pressure rod is away from the side of the main body and corresponding to the telescopic support. Rolling members are respectively provided on both sides of the first axial direction, and the rolling members can roll along the first circumferential direction.

2. A steel pipe segment rounding device according to claim 1, characterized in that: The end of the telescopic support is connected to the longitudinal center of the pressure rod, and the rolling element on the telescopic support is symmetrically arranged relative to the telescopic support.

3. The steel pipe segment rounding device according to claim 1, characterized in that: The pressure rod is provided with a rolling cavity corresponding to each rolling element. The rolling element is arranged to roll in the rolling cavity. The rolling element protrudes from a side surface of the pressure rod away from the main body.

4. The steel pipe segment rounding device according to claim 1, characterized in that: The rolling element is a bearing, a roller or a track.

5. The steel pipe segment rounding device according to claim 1, characterized in that: The compression rod is rotatable relative to the main body in a first axial direction.

6. The steel pipe segment rounding device according to claim 1, characterized in that: The telescopic support is rotatable in a first circumferential direction.

7. The steel pipe segment rounding device according to claim 1, characterized in that: A guide slope is provided on one side of both ends of the pressure rod away from the main body, and the guide slope is arranged at an acute angle to the first axial direction of the main body.

8. The steel pipe segment rounding device according to claim 7, characterized in that: A transition slope is provided between the guide slope and the rolling element on the adjacent side. 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 transition slope is provided at one end of the rolling element adjacent to the transition slope, or the transition slope is symmetrically provided at both ends of the rolling element.

9. A steel pipe segment rounding device according to any one of claims 1 to 8, characterized in that: The main body includes an extension section arranged along a first radial direction of the main body, and the telescopic support is connected to the corresponding end of the extension section; and / or, The telescopic support is provided with a sensor; the sensor collects telescopic dimension data of the telescopic support, and the collected telescopic dimension data is used to guide the circular adjustment size of each telescopic support.

10. A method for assembling and pressing steel pipe joints, characterized in that: The steel pipe segment rounding device according to any one of claims 1 to 9 comprises the following steps: S1. Arrange the steel pipe segment rounding device on the inner sides of adjacent ends of adjacent steel pipe segments, so that the two rolling members of the pressure rod are respectively arranged on the inner sides of adjacent ends of adjacent steel pipe segments; S2. By extending and retracting the retractable support, the two rolling elements of each pressure rod respectively abut the inner sides of the adjacent ends of two adjacent steel pipe sections. At the same time, the adjacent steel pipe sections deform or rotate to change the abutting positions of the rolling elements until all the rolling elements abut the circumferential equally divided points of the corresponding steel pipe sections, and the equally divided point press seams are completed.

11. A method for assembling and pressing steel pipe sections according to claim 10, characterized in that: In S1, when adjacent steel pipe sections have misaligned edges due to different circumferences, a pad is provided between the inner wall of the steel pipe section with the larger circumference and the corresponding rolling element.

12. A method for assembling and pressing steel pipe sections according to claim 10, characterized in that: It also includes S3, S3, and controls the pressure rod to move circumferentially along the steel pipe section to complete the compression of all welds.

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