A jacket pipe joint closure reinforcement structure and implementation method

Abstract

This application relates to the technical field of jackets and discloses a jacket pipe joint closure reinforcement structure and implementation method. The jacket pipe joint closure reinforcement structure includes a reinforcement seat whose inner surface is in contact with the outer surface of the jacket pipe joint. The reinforcement seat comprises a first portion, a second portion, and a third portion. The first portion is opposite the closure weld, and the second and third portions are connected to opposite sides of the first portion, respectively. The second and third portions are respectively connected to two adjacent jacket pipe joints. This application can improve the fatigue life of the jacket pipe joint closure weld when the misalignment of the jacket pipe joint closure weld is large.

Description

Technical Field

[0001] The present application relates to the technical field of jackets, and in particular to a jacket pipe joint closure reinforcement structure and an implementation method. Background Art

[0002] At present, offshore wind turbines are installed in the sea through jackets, which are produced in sections, and then the sections are welded together in turn through the corresponding pipe sections.

[0003] During the welding of pipe sections, the following problems are likely to occur: (1) There are problems when the steel plates are rolled into pipe sections; (2) The jacket is lifted and closed by non-fixed lifting equipment such as a crane ship, which is affected by the high position of the closing weld, the shaking of the crane ship, and the high-altitude wind speed, causing the adjacent pipe sections to collide and deform.

[0004] The above problems can easily lead to the circumferential misalignment exceeding one-tenth of the plate thickness or the misalignment exceeding 3mm when adjacent pipe sections are welded together. This will cause a large misalignment at the weld seam and generate a stress concentration effect at the weld seam, which will cause the jacket to be easily fatigued and affect the fatigue life of the jacket. Summary of the Invention

[0005] In order to improve the fatigue life of the pipe joint closure welds when the misalignment of the pipe joint closure butt welds is large, the present application provides a jacket pipe joint closure reinforcement structure and an implementation method.

[0006] In a first aspect, the present application provides a jacket pipe joint closure reinforcement structure, which adopts the following technical solutions:

[0007] A pipe joint closure reinforcement structure for a conductor rack includes a reinforcement seat, the inner surface of the reinforcement seat is in contact with the outer surface of the pipe joint, and the reinforcement seat includes a first part, a second part and a third part, the first part is opposite to the closure weld, the second part and the third part are respectively connected to opposite sides of the first part, and the second part and the third part are respectively connected to two adjacent pipe joints.

[0008] By adopting the above technical solution, under the premise that the misalignment of the butt welds of the pipe sections exceeds the requirements of the specifications, the fatigue stress in the closing weld area under fatigue load is reduced by attaching the reinforcement seat to the closing welds of the adjacent pipe sections, so as to improve the fatigue life of the closing welds and greatly reduce the influence of the misalignment on the fatigue life of the closing welds, thereby improving the fatigue performance of the closing welds of the pipe sections and the safety of the jacket. Moreover, since the geometric complexity of the closing welds gradually decreases from the closing welds to the two ends of the pipe sections, the difficulty of processing the reinforcement seat can be reduced by dividing the reinforcement seat into the first part, the second part and the third part.

[0009] Optionally, recessed grooves are provided at intervals around the circumference of the reinforcing seat, and the recessed grooves extend toward the closing weld.

[0010] By adopting the above technical solution, the provision of the recessed groove increases the edge length of the reinforcement seat, thereby increasing the connection length between the reinforcement seat and the pipe section and improving the safety performance of the reinforcement seat.

[0011] Optionally, the reinforcement seat has a plug welding hole, and the plug welding hole located on the first part is opposite to the closing weld.

[0012] By adopting the above technical solution, the plug welding hole increases the welding points between the reinforcing seat and the pipe segment, reducing the possibility of the reinforcing seat protruding away from the pipe segment.

[0013] Optionally, the reinforcement seat is symmetrical along the closing weld.

[0014] By adopting the above technical solution, the uniformity of the reinforcement seat around the closing weld is improved, thereby improving the reinforcement effect of the reinforcement seat on the closing weld.

[0015] Optionally, a plurality of reinforcing seats are provided along the closing weld.

[0016] By adopting the above technical solution, multiple reinforcement seats are arranged along the closing weld to reinforce all sides of the closing weld.

[0017] Optionally, it also includes an enclosing seat that is simultaneously enclosed on the outer walls of all the first parts, and the enclosing seat includes two connecting seats that are detachably spliced in half; the outer diameters of all the first parts and the inner diameters of the connecting seats are consistent, and the connecting seats are provided with multiple sliding seats that slide along their own circumferences, and each of the sliding seats has an abutment portion that moves radially along the connecting seats, and the abutment portion can abut against the plug welding hole, and there is a positioning member between the sliding seat and the connecting seat to position the sliding seat.

[0018] By adopting the above technical solution, the enclosing seat is positioned relative to the first part by abutting the abutting portion against the plug welding hole and enclosing on the outer wall of the first part at the same time, so as to further reinforce the first part, thereby improving the fatigue life of the first part, and further improving the fatigue life of the closing weld. In the process of installing the first part to the pipe segment, the position of the first part can be calibrated through the cooperation between the abutting portion and the plug welding hole, thereby improving the accuracy of the installation position of the first part.

[0019] Optionally, the cross-sectional area of the abutting portion gradually increases along the radial direction of the connecting seat toward a direction away from the reinforcing seat.

[0020] By adopting the above technical solution, the cross-sectional area of the abutting portion changes gradually, which can facilitate the abutting portion to enter the plug welding hole.

[0021] Optionally, the outer wall of the connecting seat is provided with a guide groove along its circumference, the sliding seat has a guide portion facing the guide groove, and the positioning member includes:

[0022] first teeth, distributed in the guide groove along the circumference of the connecting seat;

[0023] The movable seat slides radially along the connecting seat on the guide portion.

[0024] a second tooth, disposed on the movable seat, configured to enter the guide groove and engage with the first tooth;

[0025] The positioning ring is threaded on the guide portion along the radial direction of the connecting seat and is located on a side of the movable seat away from the guide groove.

[0026] By adopting the above technical solution, the movable seat is slid into the guide groove, so that the first tooth engages with the second tooth, thereby limiting the circumferential movement of the sliding seat along the connecting seat, and the positioning ring thread is moved to abut against the side of the movable seat away from the connecting seat to limit the second tooth from escaping the guide groove, thereby positioning the sliding seat relative to the movable seat.

[0027] Optionally, there is a welding gap between the first part and the second part, and between the first part and the third part, and the abutting part is adapted to the welding gap.

[0028] By adopting the above technical solution, before the second part and the third part are welded to the first part, the abutting part is extended into the welding gap so that the first part and the second part, or the first part and the third part abut against the abutting part, thereby guiding the positions of the second part and the third part when the second part and the third part are welded.

[0029] In a second aspect, the present application provides a method for implementing a jacket pipe joint closure reinforcement structure, which adopts the following technical solution:

[0030] A method for implementing a jacket pipe joint closure reinforcement structure includes the following steps:

[0031] S1, perform closing welding of two adjacent pipe sections;

[0032] S2, obtain three-dimensional images of the weld seam between two adjacent pipe sections through photography;

[0033] S3, processing the first, second and third steps;

[0034] S4, lifting the first part to the closing weld and welding and fixing it;

[0035] S5, hoist the second and third parts for positioning and welding.

[0036] In summary, this application has at least one of the following beneficial effects:

[0037] 1. By reinforcing the external reinforcement seat after the pipe joint closure weld is completed, the machining accuracy requirements for the misalignment of the final jacket closure weld are effectively reduced while meeting the fatigue performance requirements of the jacket foundation. This significantly reduces the difficulty of foundation machining and the difficulty of assembling the jacket foundation with suction piles (tubes). The fatigue performance of the pipe joint closure weld and the safety of the jacket are improved, effectively increasing the fatigue life of the pipe joint closure weld and avoiding a series of problems such as re-machining, grinding and reinforcement caused by excessive pipe joint misalignment during the final jacket closure assembly.

[0038] 2. By setting a recessed groove on the peripheral side of the reinforcement seat, the connection length between the peripheral side of the reinforcement seat and the pipe joint is increased, thereby improving the connectivity and installation performance of the reinforcement seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a top view of Example 1 of the present application;

[0040] Figure 2 yes Figure 1 Front view at AA;

[0041] Figure 3 This is an expanded view of the outer edge of the folded portion of the pipe section of Example 1 of the present application;

[0042] Figure 4 yes Figure 3 Cross-section at the middle BB;

[0043] Figure 5 This is a schematic structural diagram of the second embodiment of the present application;

[0044] Figure 6 yes Figure 5 Cross-section at the middle CC;

[0045] Figure 7 This is a structural diagram of the connecting socket of the second embodiment of the present application;

[0046] Figure 8 yes Figure 5 Schematic diagram of the enlarged structure at point D in the middle.

[0047] Explanation of reference numerals: 1. reinforcement seat; 101. first portion; 102. second portion; 103. third portion; 2. pipe joint; 3. closing weld; 4. recessed groove; 5. plug welding hole; 6. enclosing seat; 61. connecting seat; 611. arc plate; 612. wing plate; 7. sliding seat; 71. guide portion; 72. middle portion; 73. sliding portion; 8. abutting portion; 9. positioning member; 91. first tooth; 92 , moving seat; 93, second tooth; 94, positioning ring; 10, guide groove; 11, sliding groove; 12, welding gap; 13, raised portion; 14, recessed portion; 15, stud; 16, nut; 17, connecting rod; 18, long hole; 19, first plate; 20, second plate; 21, third plate; 22, fourth plate; 23, first seat; 24, second seat; 25, limit block; 26, limit groove; 27, limit handle. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-8 This application is described in further detail.

[0049] Example 1:

[0050] The embodiment of the present application discloses a jacket pipe joint closure reinforcement structure. Figure 1 and Figure 2 The jacket comprises at least two segments extending along its height. Adjacent segments have corresponding pipe segments 2. Each pipe segment 2 is a circular tube formed from rolled steel plate. The corresponding pipe segments 2 have the same outer diameter, and the ends of the pipe segments 2 are circular in shape, matching the outer diameter of the pipe segments 2. Adjacent segments are arranged vertically and secured by welding the corresponding pipe segments 2 together, forming a weld seam 3 between the two adjacent pipe segments 2.

[0051] The jacket node reinforcement structure includes a reinforcement seat 1, a curved plate-like structure welded to the closure weld 3. The reinforcement seat 1 is also fixed to two adjacent pipe segments 2, with the inner surface of the reinforcement seat 1 conforming to the closure weld 3 and the outer surfaces of the two adjacent pipe segments 2. Multiple reinforcement seats 1 are evenly spaced along the circumference of the closure weld 3. In this embodiment, there are four reinforcement seats 1. In other embodiments, there may be two, three, or five reinforcement seats 1.

[0052] Reference Figure 2 and Figure 3 Due to issues such as ovality and structural deformation of the pipe segment 2, the outer surface geometry of the pipe segment 2 near the closure weld 3 is often complex. This geometric complexity gradually decreases from the closure weld 3 toward the ends. To reduce the difficulty of manufacturing the reinforcement seat 1, each reinforcement seat 1 includes a first portion 101, a second portion 102, and a third portion 103.

[0053] The first part 101 is welded and fixed to the closed part of the two adjacent pipe sections 2, and the transverse center line of the first part 101 is opposite to the closed weld 3. The second part 102 is welded to the upper side of the first part 101, and the third part 103 is welded to the lower side of the first part 101. The second part 102 and the third part 103 are symmetrical along the first part 101, and the second part 102 is welded to the upper pipe section 2 of the two adjacent pipe sections 2 at the same time, and the third part 103 is welded to the lower pipe section 2 of the two adjacent pipe sections 2 at the same time.

[0054] In this embodiment, the first portion 101 is formed into an arc-shaped plate pressed from rectangular steel plate. The inner surface of the first portion 101 at the arc opening is polished to mate with the outer surface of the corresponding portion of the closed portion of the pipe segment 2. The outer surface of the first portion 101 is a smooth arc, and the outer diameter of all outer surfaces of the first portion 101 corresponding to the same closed weld seam 3 is consistent. The second portion 102 and the third portion 103 are also formed into an arc-shaped plate pressed from rectangular steel plate. The inner surface of the second portion 102 at the arc opening mates with the outer wall of the pipe segment 2 located above, and the inner surface of the third portion 103 at the arc opening mates with the outer wall of the pipe segment 2 located below.

[0055] Reference Figure 2 and Figure 3 In some embodiments, optionally, a recessed groove 4 is formed on the side of the second portion 102 and the third portion 103 that is away from each other, and the recessed groove 4 extends toward the first portion 101. The recessed grooves 4 of the second portion 102 and the third portion 103 have the same structure. Taking the second portion 102 as an example, a plurality of recessed grooves 4 are evenly spaced along the circumference of the second portion 102, so that a cyclic arrangement of raised portions 13 and recessed portions 14 is formed on the side of the second portion 102 away from the first portion 101. When the second portion 102 is fixed to the pipe segment 2, welding is performed along the edges of the raised portions 13 and recessed portions 14, thereby increasing the length of the weld between the second portion 102 and the pipe segment 2 and improving the tightness of the connection between the second portion 102 and the pipe segment 2.

[0056] Reference Figure 3 Furthermore, the sharp edges of the raised portion 13 and the recessed portion 14 have rounded corners, and the edge of the raised portion 13 smoothly transitions to the recessed portion 14, so that the side where the second portion 102 and the third portion 103 are away from each other is wavy, thereby reducing the possibility of stress concentration at the weld between the second portion 102 and the third portion 103, and improving the fatigue life of the weld between the second portion 102 and the third portion 103.

[0057] Reference Figure 3 and Figure 4In some embodiments, optionally, each of the first portion 101, the second portion 102, and the third portion 103 is provided with a plug welding hole 5, which may be oval or circular. The number of plug welding holes 5 on each of the first portion 101, the second portion 102, and the third portion 103 is one or more. In this embodiment, each of the first portion 101, the second portion 102, and the third portion 103 has three plug welding holes 5. Taking the first portion 101 as an example, the three plug welding holes 5 are evenly spaced along the circumference of the first portion 101. The same applies to the second portion 102 and the third portion 103.

[0058] By welding the inside of the plug weld hole 5 to the pipe segment 2, the welding area between the reinforcement base 1 and the pipe segment 2 is increased while reducing the possibility of the reinforcement base 1 tilting relative to the pipe segment 2. In addition, the plug weld hole 5 on the first portion 101 is opposite the closing weld 3, so that when the first portion 101 is welded, the inside of the plug weld hole 5 of the first portion 101 can be welded to two adjacent pipe segments 2 at the same time.

[0059] The implementation principle of a jacket pipe joint closure reinforcement structure in an embodiment of the present application is: multiple reinforcement seats 1 are welded at the closure weld 3 of the jacket pipe joint 2 to reinforce the closure of the pipe joint 2 and improve the fatigue performance of the closure weld 3 of the pipe joint 2.

[0060] This application also provides a method for implementing a jacket pipe joint closure reinforcement structure.

[0061] A method for implementing a jacket pipe joint closure reinforcement structure includes the following steps:

[0062] S1, closing two adjacent sections of the jacket in sections, and completing the welding between two corresponding adjacent pipe sections 2 in sequence;

[0063] S2, using an industrial photogrammetry system including a high-resolution photogrammetry camera to obtain multiple digital images of the closing weld 3 of the pipe segment 2 and its surrounding area at different positions and directions. After image processing, a three-dimensional result of the misalignment of the entire closing weld 3 is obtained to determine the geometric shape of the inner surface of the reinforcement seat 1;

[0064] S3, the first portion 101 is machined by CNC cutting and arc profiling. After profiling, the plug welding hole 5 and the weld grooves for the second portion 102 and the third portion 103 are opened. Based on the actual data from the video measurement, the inner surface of the first portion 101 is machined by a CNC center and finely polished to ensure that the first portion 101 is tightly fitted with the outer surface of the pipe segment 2.

[0065] The second part 102 and the third part 103 are processed by CNC cutting and arc profiling. After profiling, the second part 102 and the third part 103 are provided with a recessed groove 4, a plug welding hole 5 and a welding groove for connecting with the first part 101. Then, all edges to be welded are polished and smoothed.

[0066] S4, setting up a welding platform, lifting the first part 101 to the corresponding position by a car crane, etc., and fixing the first part 101 by fillet welding or deep penetration welding after it is in place;

[0067] S5, after the first part 101 is fixed, the hoisting and positioning welding operation of the second part 102 and the third part 103 is completed;

[0068] S6: After all welding and weld grinding work is completed, anti-corrosion painting work is carried out.

[0069] Example 2:

[0070] In Example 1, because the inner surface of the first portion 101 is polished according to the corresponding position of the pipe segment 2, when multiple reinforcement seats 1 are provided, the position of the first portion 101 on the pipe segment 2 needs to be repeatedly adjusted before each first portion 101 is welded to the pipe segment 2 to ensure that the first portion 101 is moved to the correct position, making it difficult to calibrate the mating position of the first portion 101 and the pipe segment 2. Therefore, to facilitate this step, the present application further improves on the basis of Example 1.

[0071] A jacket pipe joint closure reinforcement structure, which is different from the first embodiment in that, Figure 5 The jacket pipe joint closing and strengthening structure further includes an enclosing seat 6 , which simultaneously encloses and adheres to the outer walls of all the first parts 101 .

[0072] Reference Figure 6 and Figure 7 , wherein the enclosed seat 6 includes two connecting seats 61, the two connecting seats 61 have the same structure, each connecting seat 61 includes an arc plate 611 and a wing plate 612, the arc plate 611 is a semicircular arc with an inner diameter consistent with the outer diameter of the first part 101, and the wing plate 612 is a square plate structure. There are two wing plates 612 in each connecting seat 61, and the two wing plates 612 are respectively fixed on the outer walls at both ends of the arc plate 611 away from each other.

[0073] The wing plates 612 are provided with communication holes, and the connecting base 61 is equipped with studs 15 and nuts 16 for passing through the communication holes. The two connecting bases 61 are assembled so that the wing plates 612 on the two connecting bases 61 abut against each other, and the communication holes on the two abutting wing plates 612 correspond and are connected. The studs 15 are then passed through the communication holes and simultaneously passed through the two abutting wing plates 612. The nuts 16 are then tightened at each end of the studs 15, thereby connecting the two connecting bases 61 to form the enclosed base 6.

[0074] Reference Figure 6 and Figure 8 Each connecting seat 61 has a plurality of sliding seats 7 slidably disposed along its circumferential outer wall of the arc plate 611. There are at least four sliding seats 7, and in this embodiment, each connecting seat 61 has six sliding seats 7. A connecting rod 17 is threadedly threaded along the radial direction of the connecting seat 61. An abutment 8 is fixed to the end of the connecting rod 17 proximal to the connecting seat 61. The abutment 8 is frustum-shaped, with its longitudinal cross-sectional area gradually increasing as it moves away from the connecting seat 61. The minimum outer diameter of the abutment 8 is smaller than the outer diameter of the plug weld hole 5, while the maximum outer diameter of the abutment 8 is larger than the outer diameter of the plug weld hole 5.

[0075] Reference Figure 7 and Figure 8 A long hole 18 is defined in the middle of the connecting seat 61 in the axial direction, extending through the inner and outer sides of the connecting seat 61. The long hole 18 extends circumferentially along the arc plate 611 of the connecting seat 61, with the opposing ends of the long hole 18 close to the ends of the arc plate 611 of the connecting seat 61 that are spaced apart from each other. The vertical height of the long hole 18 is greater than the vertical height of the plug weld hole 5. The abutment portion 8 is positioned opposite the long hole 18 and can pass through the connecting seat 61 through the long hole 18, allowing the abutment portion 8 to partially enter the plug weld hole 5. The upper and lower outer walls of the abutment portion 8 respectively abut the upper and lower walls of the plug weld hole 5. A positioning member 9 is provided between the sliding seat 7 and the connecting seat 61, and is used to position the sliding seat 7 on the connecting seat 61.

[0076] Reference Figure 6 and Figure 8 Taking the example of four reinforcement seats 1 corresponding to the closure weld 3 and three plug welding holes 5 on each first portion 101, the first portions 101 of the four reinforcement seats 1 are defined as plate 19, plate 20, plate 3, plate 21, and plate 4, respectively, and the two connecting seats 61 are positioned as plate 1 23 and plate 24, respectively. When the first enclosing seat 6 is in use, plate 19 is first welded to the pipe segment 2. The six sliding seats 7 on the connecting seat 61 are then divided into two groups and positioned using positioning members 9, with three sliding seats 7 forming a group. When the two connecting seats 61 are connected to form the enclosing seat 6, the four sliding seat 7 groups on the enclosing seat 6 are evenly spaced along the circumference of the enclosing seat 6, so that the four sliding seat 7 groups correspond to the welding positions of the four reinforcement seats 1 on the pipe segment 2. Furthermore, the positions of the three sliding seats 7 in each sliding seat 7 group correspond to the positions of the three plug welding holes 5 on the first portion 101.

[0077] Afterwards, the threaded movement of each connecting rod 17 adjusts the position of the abutment 8, so that when the arc plate 611 of the connecting seat 61 is coaxially fitted to the outer wall of the first part 101, the abutment 8 can cooperate with the corresponding plug welding hole 5, and the upper and lower outer walls of the abutment 8 respectively abut against the upper and lower hole walls of the plug welding hole 5, and the relative positions of all the abutment parts 8 and the sliding seat 7 are consistent.

[0078] Then, a seat 23 is fitted onto a plate 19 so that the abutting portion 8 of a sliding seat 7 group on the seat 23 mates with the plug welding hole 5 of the plate 19, thereby making the seat 23 coaxial with the plate 19. The second plate 20 is then abutted against the pipe segment 2, with the first plate 19 and the second plate 20 located on opposite sides of the pipe segment 2. The second seat 24 is then abutted against the seat 23 and abutted against the second plate 20, with the abutting portion 8 of a sliding seat 7 group on the second seat 24 mates with the plug welding hole 5 of the second plate 20. The position of the second seat 24 is then designated according to the position of the seat 23. The position of the second plate 20 is then calibrated according to the position of the seat 24, so that the second plate 20 accurately abuts against the corresponding position of the pipe segment 2.

[0079] After aligning the second plate 20 with the second seat 24, the first seat 23 and the second seat 24 are connected using studs 15 and nuts 16, positioning the enclosed seat 6 relative to the pipe segment 2. Next, one abutment portion 8 on the second seat 24 is moved out of the plug weld hole 5, and the plug weld hole 5 is welded to the pipe segment 2 to secure the second plate 20 to the pipe segment 2. The first seat 23 and the second seat 24 are then disassembled, and the remaining portions of the second plate 20 are welded.

[0080] After the second plate 20 is welded, the third and fourth plates 21 and 22 are aligned and welded sequentially based on the alignment of the second plate 20. After the reinforcement seat 1 is welded, the abutting portions 8 of the two connecting seats 61 and the sliding seat 7 are aligned with the four first portions 101, respectively. The two connecting seats 61 are then connected to form an enclosure seat 6. The enclosure seat 6 is positioned relative to the jacket and becomes part of the jacket. This allows the enclosure seat 6 to further reinforce the reinforcement seat 1, further improving the fatigue life of the closure of the pipe segment 2.

[0081] Reference Figure 8 The sliding seat 7 includes a guide portion 71, an intermediate portion 72, and a sliding portion 73. Both the guide portion 71 and the sliding portion 73 are rod-shaped structures extending radially along the arc plate 611 of the connecting seat 61. The intermediate portion 72 is a rod-shaped structure extending axially along the arc plate 611 of the connecting seat 61. The intermediate portion 72 is fixedly connected to the guide portion 71 and the sliding portion 73 at both ends, forming a U-shaped structure with the opening facing the connecting seat 61. The connecting rod 17 is threadedly inserted into the intermediate portion 72, and the abutment portion 8 moves into the opening of the sliding seat 7.

[0082] Reference Figure 7 and Figure 8The outer wall of the connecting seat 61 is provided with a sliding groove 11 and a guide groove 10 extending circumferentially along the connecting seat 61. The sliding groove 11 and the guide groove 10 are respectively located on the upper and lower sides of the long hole 18. The end of the sliding portion 73 away from the middle portion 72 extends into the sliding groove 11, and the portion where the sliding portion 73 and the sliding groove 11 cooperate is dovetail-shaped, so that the sliding portion 73 cannot be separated from the sliding groove 11 in the radial direction of the connecting seat 61. The sliding portion 73 slides circumferentially along the connecting seat 61 within the sliding groove 11, thereby driving the sliding seat 7 to slide circumferentially along the connecting seat 61.

[0083] Reference Figure 6 and Figure 8 The positioning member 9 includes a first tooth 91, a movable seat 92, a second tooth 93 and a positioning ring 94. The first tooth 91 has a plurality of teeth and is located in the guide groove 10. The first teeth 91 are evenly distributed on the inner top wall of the guide groove 10 along the circumference of the connecting seat 61. The guide portion 71 is in the shape of a round rod, and the end of the guide portion 71 away from the middle portion 72 is close to the outer wall of the connecting seat 61. The movable seat 92 is cylindrical, and the movable seat 92 is coaxially sleeved on the outer wall of the guide portion 71, and the inner wall of the movable seat 92 has a limit block 25. The outer wall of the guide portion 71 is provided with a limit groove 26 along the axial direction of the guide portion 71 for the limit block 25 to slide, so that the movable seat 92 can only slide along the axial direction of the guide portion 71.

[0084] The second teeth 93 are fixed to the top wall of the movable seat 92. When the movable seat 92 moves away from the middle portion 72, the movable seat 92 drives the second teeth 93 into the guide groove 10, and the second teeth 93 engage with the first teeth 91, thereby limiting the circumferential movement of the sliding seat 7 along the connecting seat 61. A positioning ring 94 is threadedly mounted on the outer wall of the guide portion 71 and is located at one end of the movable seat 92 near the middle portion 72. When the second teeth 93 engage with the first teeth 91, the positioning ring 94 is threadedly moved until it abuts against the end of the movable seat 92 near the middle portion 72, thereby limiting the second teeth 93 from moving out of the guide groove 10, thereby positioning the sliding seat 7 relative to the connecting seat 61.

[0085] Reference Figure 5 and Figure 8 In some embodiments, the outer diameters of the first portion 101, the second portion 102, and the third portion 103 are optionally the same. A welding gap 12 is provided between the sides of the first portion 101 and the second portion 102 that are close to each other, and between the sides of the first portion 101 and the third portion 103 that are close to each other, so that the first portion 101 is more easily welded to the second portion 102 and the third portion 103, thereby making the connection between the first portion 101, the second portion 102, and the third portion 103 tighter.

[0086] When welding the second part 102 and the third part 103 to the first part 101, the enclosing seat 6 is moved to the opening of the sliding seat 7 opposite to the welding gap 12, and the connecting rod 17 is threadedly moved to the abutment part 8 to partially enter the welding gap 12, so that the enclosing seat 6 abuts the first part 101 and the second part 102, or the first part 101 and the third part 103 at the same time, and the side where the first part 101 and the second part 102 are close to each other, or the side where the first part 101 and the third part 103 are close to each other abuts on the outer wall of the abutment part 8, so that when the first part 101 is welded to the second part 102 and the third part 103, the enclosing seat 6 positions the second part 102 and the third part 103, and the abutment seat calibrates the weld gap to improve the accuracy of the welding position of the second part 102 and the third part 103.

[0087] In some embodiments, optionally, the end of the connecting rod 17 away from the abutting portion 8 has a limiting handle 27 , and the limiting handle 27 assists the rotation of the connecting rod 17 .

[0088] This application also provides a method for implementing a jacket pipe joint closure reinforcement structure.

[0089] A method for implementing a jacket pipe joint closure reinforcement structure includes the following steps:

[0090] S1 to S3 are the same as S1 to S3 in Example 1;

[0091] S4, setting up a welding platform, lifting one of the first parts 101 to a corresponding position, and performing welding positioning;

[0092] S5, mate one of the connecting seats 61 with the welded first part 101, so that the abutting portion 8 on the sliding seat 7 of the connecting seat 61 abuts against the plug welding hole 5 of the first part 101, then hoist the other first part 101 to the closing weld 3, and mate the other connecting seat 61 with the first part 101 laid later, the leading connecting seat 61 positions the position of the later connecting seat 61, and the later connecting seat 61 calibrates the position of the later first part 101. After the calibration is completed, weld the later first part 101;

[0093] S6, repeat S5 until all the first parts 101 at the closure weld 3 are aligned and the welding is completed;

[0094] S7, sequentially hoist the second portion 102 and the third portion 103 to the pipe joint 2, move the enclosing seat 6 to face the welding gap 12, and move the abutting portion 8 into the welding gap 12 to calibrate and position the second portion 102 and the third portion 103, and then weld the second portion 102 and the third portion 103;

[0095] S8, after all welding and weld grinding work is completed, anti-corrosion painting work is carried out.

[0096] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A jacket pipe joint closure reinforcement structure, characterized by: The reinforcing seat (1) comprises an inner surface of the reinforcing seat (1) and an outer surface of the pipe section (2), and the reinforcing seat (1) comprises a first portion (101), a second portion (102) and a third portion (103), the first portion (101) is opposite to the closing weld (3), the second portion (102) and the third portion (103) are respectively connected to opposite sides of the first portion (101), and the second portion (102) and the third portion (103) are respectively connected to two adjacent pipe sections (2); The reinforcing seat (1) has a plug welding hole (5), and the plug welding hole (5) located on the first part (101) is opposite to the closing weld (3); It also includes an enclosing seat (6) that is simultaneously enclosed on the outer walls of all the first parts (101), and the enclosing seat (6) includes two connecting seats (61) that are detachably spliced in half; the outer diameters of all the first parts (101) and the inner diameters of the connecting seats (61) are consistent, and the connecting seats (61) have multiple sliding seats (7) that slide along their own circumferential direction, and each of the sliding seats (7) has an abutment portion (8) that moves radially along the connecting seat (61), and the abutment portion (8) can abut against the plug welding hole (5), and a positioning member (9) is provided between the sliding seat (7) and the connecting seat (61) for positioning the sliding seat (7).

2. The jacket pipe joint closure reinforcement structure according to claim 1, characterized in that: Concave grooves (4) are arranged at intervals around the circumference of the reinforcement seat (1), and the concave grooves (4) extend toward the closing weld (3).

3. The jacket pipe joint closure reinforcement structure according to claim 1, characterized in that: The reinforcement seat (1) is symmetrical along the closing weld (3).

4. The jacket pipe joint closure reinforcement structure according to claim 1, characterized in that: A plurality of the reinforcement seats (1) are provided along the closing weld (3).

5. The jacket pipe joint closure reinforcement structure according to claim 1, characterized in that: The cross-sectional area of the abutment portion (8) gradually increases along the radial direction of the connection seat (61) in a direction away from the reinforcement seat (1).

6. The jacket pipe joint closure reinforcement structure according to claim 1, characterized in that: The outer wall of the connecting seat (61) is provided with a guide groove (10) along its circumference, the sliding seat (7) has a guide portion (71) facing the guide groove (10), and the positioning member (9) includes: First teeth (91) are distributed in the guide groove (10) along the circumference of the connecting seat (61); The movable seat (92) slides radially along the connecting seat (61) on the guide portion (71). A second tooth (93) is provided on the movable seat (92) and is used to enter the guide groove (10) and engage with the first tooth (91); A positioning ring (94) is threaded on the guide portion (71) along the radial direction of the connecting seat (61) and is located on a side of the movable seat (92) facing away from the guide groove (10).

7. The jacket pipe joint closure reinforcement structure according to claim 1, characterized in that: There is a welding gap (12) between the first part (101) and the second part (102), and between the first part (101) and the third part (103), and the abutting part (8) is adapted to the welding gap (12).

8. A method for implementing a jacket pipe joint closure reinforcement structure, the jacket pipe joint closure reinforcement structure according to any one of claims 1 to 7, characterized in that: The following steps are included: S1, performing closing welding of two adjacent pipe sections (2); S2, obtaining a three-dimensional image of the weld seam (3) between two adjacent pipe sections (2) by photography; S3, performing processing of the first part (101), the second part (102) and the third part (103); S4, hoisting the first part (101) to the closing weld (3) for welding and fixing; S5, hoisting and positioning the second part (102) and the third part (103) for welding.

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