Welding positioning tool

Abstract

The utility model provides a kind of welding positioning tool, for welding vertical pipe and equipment component, equipment component is set to the outer periphery of welding vertical pipe and is inclined relative to welding vertical pipe, and equipment component is equipped with insertion hole.Welding positioning tool includes: positioning cylinder, it includes the multiple cylinder segments of detachable connection, multiple cylinder segments are enclosed and form a internally hollow cylinder after being connected, and can be sleeved in the outer periphery of vertical pipe;Multiple fixing pieces, along the circumferential direction of positioning cylinder, are spaced apart and set to the outer periphery of positioning cylinder;Multiple fixing pieces are set one by one with equipment component, and the end of each fixing piece away from positioning cylinder is provided with perforation;Multiple positioning pins are set one by one with multiple perforations, and each positioning pin can pass through perforation and be connected with fixing piece;Wherein, positioning pin can be located above equipment component, positioning pin can pass through perforation and be inserted in the insertion hole of equipment component, and positioning pin is parallel to equipment component.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a welding positioning fixture. Background Technology

[0002] In ship riser suspension systems, the installation, welding, and positioning of risers and equipment components are critical. These components are welded at an angle, and this angle has tolerance requirements (±0.1 degrees). The angle must not exceed these tolerances across all 360 degrees (up, down, left, right). Currently, manual installation and welding are commonly used, but measurement methods cannot guarantee the required accuracy. Utility Model Content

[0003] The purpose of this invention is to provide a welding positioning fixture that ensures the required welding positioning accuracy, thereby solving the problems of the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a welding positioning fixture for welding a riser and an equipment component inclinedly disposed on the outer periphery of the tube, wherein the equipment component is provided with a insertion hole, and the welding positioning fixture includes: The positioning cylinder comprises multiple detachably connected cylindrical segments, which are connected to form a hollow cylindrical shape that can be fitted onto the outer periphery of the riser. Multiple fasteners are spaced apart around the outer periphery of the positioning cylinder; each of the multiple fasteners corresponds to one of the equipment components, and each fastener has a through hole at its end away from the positioning cylinder; the fasteners are detachably connected to the equipment components. Multiple positioning pins are provided in a one-to-one correspondence with the multiple through holes, and each positioning pin can pass through the through hole; The positioning pin can be located above the device component, and can pass through the through hole and be inserted into the insertion hole of the device component, and the positioning pin is parallel to the device component.

[0005] In one embodiment, the positioning pin includes a pin head and a pin rod, wherein the pin head is larger than the through hole and cannot pass through the through hole, and the pin rod can pass through the through hole; The cross-sectional shape of the pin is adapted to the insertion hole of the equipment component.

[0006] In one embodiment, the insertion hole is square, and the cross-section of the pin is square; The size of the pin is smaller than the size of the insertion hole, and the difference between the two is 0.2mm to 0.4mm.

[0007] In one embodiment, each of the cylindrical segments includes an arc-shaped plate and connecting plates located at opposite ends of the arc-shaped plate, and adjacent cylindrical segments are detachably connected through the connecting plates.

[0008] In one embodiment, the number of the cylindrical segments is two; The connecting plate has through holes, and the two connecting plates are mated together and connected by fasteners.

[0009] In one embodiment, when the connecting plates of the two cylindrical sections are connected, there is a gap of 8-12mm between the two connecting plates.

[0010] In one embodiment, the fastener includes a fixing plate and a support plate. The fixing plate is obliquely fixed to the outer periphery of the cylindrical section and perpendicular to the equipment component. The end of the fixing plate is provided with the through hole. The fixing plate is provided with a plurality of bolt holes for connecting with the equipment component. The plurality of bolt holes are arranged at intervals around the through hole. The positioning pin is perpendicular to the fixing plate. The support plate is disposed between the cylindrical section and the fixing plate.

[0011] In one embodiment, the end of the fixing plate extends downward to the bottom of the positioning cylinder, and the through hole is provided on the part of the fixing plate that extends out of the positioning cylinder, so that when the positioning pin is inserted into the through hole, the bottom end of the positioning pin can be positioned below the positioning cylinder at intervals.

[0012] In one embodiment, the fastener includes a base plate disposed at the bottom of the support plate and connecting the cylindrical section and the fixing plate.

[0013] In one embodiment, the support plate has a triangular cross-section, with its three sides connecting the positioning cylinder, the fixing plate, and the base plate, respectively. The corners of the support plate are chamfered; The base plate has a square cross-section, and its two ends along the radial direction of the positioning cylinder are respectively connected to the positioning cylinder and the fixing plate. The corners of the fixing plate are chamfered.

[0014] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects: The welding positioning fixture of this utility model is connected to the outer circumference of the riser by a positioning cylinder and the positioning pin is inserted into the insertion hole of the equipment component to make it in the correct position, thereby enabling all-round control of the angle and ensuring positioning accuracy and welding accuracy.

[0015] By connecting the welding positioning fixture to the riser and the fixed plate to the equipment components, the displacement of the upper part of the equipment components during the welding process is effectively controlled, such as rotation, tilting, tilting or left and right, thus avoiding welding deformation and ensuring that the equipment components meet the design tolerance requirements before and after welding. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the welding positioning fixture in this utility model.

[0017] Figure 2 This is a top view schematic diagram of the welding positioning fixture in this utility model.

[0018] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0019] Figure 4 This is a front view schematic diagram of the welding positioning fixture positioning riser and equipment components in this utility model.

[0020] Figure 5 yes Figure 4 Cross-sectional view along the BB direction.

[0021] Figure 6 yes Figure 5 A magnified view of a portion of the image.

[0022] Figure 7 This is a structural schematic diagram of the middle cylinder section and connecting plate of this utility model.

[0023] Figure 8 This is a schematic diagram of the structure of the fixing component after an explosion in this utility model.

[0024] Figure 9 This is a schematic diagram of the positioning pin in this utility model.

[0025] The annotations in the attached figures are explained as follows: 1. Welding positioning fixture; 11. Positioning cylinder; 111. Cylinder section; 112. Connecting plate; 12. Fixing component; 121. Fixing plate; 1211. Through hole; 122. Support plate; 123. Base plate; 13. Positioning pin; 131. Pin head; 132. Pin rod; 2. Riser pipe; 3. Equipment components. Detailed Implementation

[0026] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0027] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0028] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0029] This application provides a welding positioning fixture, which is mainly used for positioning during welding.

[0030] This welding positioning fixture is particularly suitable for welding risers and equipment components inclined around the periphery of floating production storage and offloading (FPSO) units. The equipment components are equipped with insertion holes.

[0031] Understandably, this welding positioning fixture can also be used for welding positioning between tubular structures and structures that are inclined to the outer periphery of the tubular structure.

[0032] In this application, the welding positioning fixture is used as an example on the riser and equipment components. The equipment component is a locking tongue.

[0033] The riser has multiple openings, and locking tongues are inserted into these openings. The locking tongues and the riser need to be welded together. In this embodiment, eight locking tongues are used as an example. The eight locking tongues are evenly arranged along the circumference of the riser.

[0034] Combination Figures 1-6The welding positioning fixture 1 includes a positioning cylinder 11, multiple fixing members 12, and multiple positioning pins 13. The positioning cylinder 11 includes multiple detachably connected cylindrical segments 111, which, when connected, form a hollow cylindrical shape that can be fitted onto the outer periphery of the riser 2. Multiple fixing members 12 are spaced apart along the circumference of the positioning cylinder 11 on its outer periphery. The fixing members 12 are detachably connected to the equipment component 3. Multiple positioning pins 13 are correspondingly arranged with multiple through holes 1211, and each positioning pin 13 can pass through the through hole 1211 and connect to a fixing member 12. The positioning pins 13 can be located above the equipment component 3, and can pass through the through hole 1211 and be inserted into the insertion hole of the equipment component 3, with the positioning pins 13 parallel to the equipment component 3.

[0035] That is, by fitting the positioning cylinder 11 onto the outside of the riser 2, inserting the positioning pin 13 into the locking tongue, and connecting the fixing member 12 to the equipment component 3, the welding positioning fixture 1 is simultaneously connected to both the riser 2 and the locking tongue, thus achieving positioning of both and ensuring that the equipment component 3 meets the design tolerance requirements before and after welding, preventing welding deformation. Therefore, this welding positioning fixture 1 facilitates welding between the riser 2 and the locking tongue with high precision.

[0036] The positioning cylinder 11 includes multiple detachably connected cylinder segments 111. The multiple cylinder segments 111 are connected to form a hollow cylinder that can be fitted onto the outer periphery of the riser 2. Each cylinder segment 111 includes an arc-shaped plate and connecting plates 112 located at opposite ends of the arc-shaped plate. Adjacent cylinder segments 111 are detachably connected to each other through the connecting plates 112.

[0037] In this specific embodiment, there are two cylindrical segments 111. That is, the arc-shaped plate is semi-circular. In other embodiments, the number of cylindrical segments 111 can be three, four, or other numbers, depending on the actual needs.

[0038] See Figure 7 The connecting plates 112 are arranged at opposite ends of the arc-shaped plate. The connecting plates 112 are provided with multiple connecting holes, which are spaced apart along the axial direction of the cylindrical section 111.

[0039] When adjacent cylindrical sections 111 are connected, the connecting plate 112 of one cylindrical section 111 fits against the connecting plate 112 of the other cylindrical section 111, and a detachable connection is achieved by fasteners simultaneously passing through corresponding connecting holes on the two connecting plates 112. Preferably, when the connecting plates 112 of two cylindrical sections 111 are connected, there is a 10 mm gap between the two connecting plates 112 as a pre-tightening space.

[0040] The detachable connection between the cylindrical sections 111 allows the positioning cylinder 11 to be fitted onto the outer circumference of the riser 2, enabling flexible disassembly of the positioning cylinder 11. This is efficient, durable, and not easily damaged. Furthermore, the positioning cylinder 11 can rotate 360 ​​degrees, allowing the entire welding positioning fixture 1 to rotate relative to the riser 2, thereby better controlling the amount of welding deformation in all directions.

[0041] Among them, section 111 needs to be machined to meet the form and position tolerances and dimensional tolerances.

[0042] Multiple fasteners 12 are spaced apart along the circumference of the positioning cylinder 11 on its outer periphery. In this embodiment, there are 8 fasteners 12, with 4 fasteners 12 corresponding to each cylinder segment 111.

[0043] The fastener 12 includes a fixing plate 121 and a support plate 122. The fixing plate 121 is obliquely fixed to the outer periphery of the cylinder section 111 and is perpendicular to the equipment component 3.

[0044] See Figure 8 The fixed plate 121 has a through hole 1211 at its end. The axis of the through hole 1211 is perpendicular to the fixed plate 121, that is, the axis of the through hole 1211 is parallel to the equipment component 3. The end of the fixed plate 121 refers to the end away from the positioning cylinder 11.

[0045] The outer contour shape of the perforation 1211 is consistent with the outer contour shape of the insertion hole on the equipment component 3, so there is no need to damage the equipment component 3.

[0046] The fixing plate 121 is provided with multiple bolt holes for connecting with the equipment component 3, and the multiple bolt holes are arranged at intervals around the through hole 1211.

[0047] The fixing plate 121 is roughly square, and is arc-shaped at the connection with the positioning cylinder 11, while fitting against the outer periphery of the positioning cylinder 11.

[0048] The support plate 122 is disposed between the cylindrical section 111 and the fixing plate 121.

[0049] The fastener 12 includes a base plate 123. The base plate 123 is disposed at the bottom of the support plate 122 and connects the cylindrical section 111 and the fixing plate 121.

[0050] Specifically, the support plate 122 has a triangular cross-section, with its three sides connecting the positioning cylinder 11, the fixing plate 121, and the base plate 123, respectively. The support plate 122 is attached to the outer periphery of the positioning cylinder 11 and extends along the axial direction of the positioning cylinder 11. At the same time, the support plate 122 is also connected to the fixing plate 121, increasing the connection strength between the fixing plate 121 and the positioning cylinder 11.

[0051] The base plate 123 has a square cross-section, and its two ends along the radial direction of the positioning cylinder 11 are respectively connected to the positioning cylinder 11 and the fixing plate 121. The plate surface of the base plate 123 is perpendicular to the axial direction of the positioning cylinder 11. It is connected to the bottom of the support plate 122 and simultaneously connects the positioning cylinder 11 and the fixing plate 121, further increasing the connection strength between the fixing plate 121 and the positioning cylinder 11.

[0052] Furthermore, the corners of the support plate 122 are chamfered. The corners of the fixing plate 121 are chamfered.

[0053] Multiple positioning pins 13 are provided one-to-one with multiple through holes 1211, and each positioning pin 13 can pass through the through hole 1211 and connect to the fastener 12. In this embodiment, there are 8 positioning pins 13, which is the same as the number of equipment components 3.

[0054] Installation and welding positioning can be achieved by inserting a single positioning pin 13 into the insertion hole, or by symmetrically inserting two or four positioning pins 13 in the circumference of the positioning cylinder 11, or by inserting eight positioning pins 13 one-to-one into the insertion hole.

[0055] The positioning pin 13 is perpendicular to the fixing plate 121, so that the positioning pin 13 is parallel to the equipment component 3.

[0056] See Figure 9 The positioning pin 13 includes a pin head 131 and a pin rod 132. The pin head 131 is larger than the through hole 1211 and cannot pass through the through hole 1211, while the pin rod 132 can pass through the through hole 1211. The connection between the positioning pin 13 and the fixing member 12 is achieved by limiting the pin head 131.

[0057] The cross-sectional shape of the pin 132 is adapted to the insertion hole of the equipment component 3. Specifically, the insertion hole is square, and the cross-section of the pin 132 is square. Therefore, by inserting the positioning pin 13 into the equipment component 3, the equipment component 3 cannot rotate relative to the riser 2, thus achieving 360-degree all-round control over its positioning and welding deformation.

[0058] Preferably, the size of the pin 132 is smaller than the size of the insertion hole, with a difference of 0.2mm to 0.4mm. This allows the locating pin 13 to be smoothly inserted into the insertion hole. A petroleum jelly-like lubricant can also be used when inserting the locating pin 13.

[0059] In the entire welding positioning fixture 1, the end of the fixing plate 121 extends downward to the bottom of the positioning cylinder 11, and the through hole 1211 is provided on the part of the fixing plate 121 that extends out of the positioning cylinder 11, so that when the positioning pin 13 is inserted into the through hole 1211, the bottom end of the positioning pin 13 can be located at intervals below the positioning cylinder 11.

[0060] During the manufacturing of the welding positioning fixture 1, the cylindrical section 111 of the positioning cylinder 11, the fixing plate 121 of the fixing component 12, and the positioning pin 13 are processed, and the form and position tolerances and dimensional tolerances must be guaranteed to ensure the accuracy between the final riser 2 and the equipment component 3.

[0061] First, the fixing plate 121, support plate 122, and base plate 123 are welded to the outer periphery of the cylinder section 111 as required. Then, connecting plates 112 are welded to the opposite ends of the cylinder section 111. Next, the inner surface of the welded cylinder section 111 is machined according to the dimensions of the equipment body and the tolerance requirements of the drawings. The through holes 1211 on the fixing plate 121 are machined, and the bottom surface of the fixing plate 121 that needs to abut against the equipment component 3 is machined.

[0062] Next, the locating pin 13 is machined according to the dimensions, surface roughness requirements and fit tolerance requirements of the drawing.

[0063] Among them, the bolt holes on the fixing plate 121 can be processed on site, that is, the welding positioning fixture 1 and the equipment component 3 are combined and drilled on site.

[0064] Combination Figure 4 — Figure 6 When using the welding positioning fixture 1, the two cylindrical sections 111 and the fixing parts 12 fixed to the outer periphery of the cylindrical sections 111 are attached to the outer periphery of the riser 2. The angle and height are adjusted, the positioning dimensions are measured, and then the cylindrical sections 111 are connected to each other through the connecting plate 112. A 10 mm gap is left between the two connecting plates 112 as pre-tightening space. After the adjustment value meets the requirements of the drawing, bolt holes are made on the fixing plate 121 on site, and then bolts are tightened to connect the fixing plate 121 to the equipment component 3. Next, the positioning pin 13 is used, and then the installation angle and positioning dimensions of the equipment component 3 are measured again. After meeting the requirements of the drawing, the welding operation is carried out.

[0065] After welding is completed, the installation angle and positioning dimensions of component 3 of the measuring equipment are checked again. If they meet the dimensions and tolerance requirements of the drawings, the welding operation is successfully completed.

[0066] In summary, this welding positioning fixture has the following advantages: This welding positioning fixture is fitted onto the outer circumference of the riser via a positioning sleeve, and the positioning pin is inserted into the insertion hole of the equipment component to place it in the correct position. This allows for all-around angle control, ensuring positioning accuracy and welding precision.

[0067] Because there is an effective connection between the lower end of the equipment component and the riser, the riser has a certain control over the lower end of the equipment component. However, when full penetration welding (beveling and root cleaning) is required at the lower end of the equipment component, significant welding deformation stress is generated, causing displacement of the entire equipment component, especially the upper end, and changing the overall installation angle. This application effectively controls the displacement of the upper end of the equipment component during welding, such as rotation, tilting, downward tilting, or left and right tilting, by using a welding positioning fixture connected to the riser and a fixing plate connected to the equipment component. This avoids welding deformation, ensures that the equipment component meets design tolerance requirements before and after welding, and guarantees the overall function of the riser suspension system.

[0068] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A welding positioning fixture for welding a riser and an equipment component inclinedly disposed on the outer periphery of a tubular structure, wherein the equipment component is provided with a insertion hole, characterized in that, The welding positioning fixture includes: The positioning cylinder comprises multiple detachably connected cylindrical segments, which are connected to form a hollow cylindrical shape that can be fitted onto the outer periphery of the riser. Multiple fasteners are spaced apart around the outer periphery of the positioning cylinder; each of the multiple fasteners corresponds to one of the equipment components, and each fastener has a through hole at its end away from the positioning cylinder; the fasteners are detachably connected to the equipment components. Multiple positioning pins are provided in a one-to-one correspondence with the multiple through holes, and each positioning pin can pass through the through hole; The positioning pin can be located above the device component, and can pass through the through hole and be inserted into the insertion hole of the device component, and the positioning pin is parallel to the device component.

2. The welding positioning fixture according to claim 1, characterized in that, The positioning pin includes a pin head and a pin rod. The pin head is larger than the through hole and cannot pass through the through hole, while the pin rod can pass through the through hole. The cross-sectional shape of the pin is adapted to the insertion hole of the equipment component.

3. The welding positioning fixture according to claim 2, characterized in that, The insertion hole is square, and the cross-section of the pin is square. The size of the pin is smaller than the size of the insertion hole, and the difference between the two is 0.2mm to 0.4mm.

4. The welding positioning fixture according to claim 2, characterized in that, Each of the cylindrical segments includes an arc-shaped plate and connecting plates located at opposite ends of the arc-shaped plate. Adjacent cylindrical segments are detachably connected through the connecting plates.

5. The welding positioning fixture according to claim 4, characterized in that, The number of the cylindrical sections is two; The connecting plate has through holes, and the two connecting plates are mated together and connected by fasteners.

6. The welding positioning fixture according to claim 5, characterized in that, When the connecting plates of the two cylindrical sections are connected, there is a gap of 8-12mm between the two connecting plates.

7. The welding positioning fixture according to claim 1, characterized in that, The fastener includes a fixing plate and a support plate. The fixing plate is obliquely fixed to the outer periphery of the cylindrical section and perpendicular to the equipment component. The end of the fixing plate is provided with the through hole. The fixing plate is provided with a plurality of bolt holes for connecting with the equipment component. The plurality of bolt holes are arranged at intervals around the through hole. The positioning pin is perpendicular to the fixing plate. The support plate is disposed between the cylindrical section and the fixing plate.

8. The welding positioning fixture according to claim 7, characterized in that, The end of the fixing plate extends downward to the bottom of the positioning cylinder, and the through hole is provided on the part of the fixing plate that extends out of the positioning cylinder, so that when the positioning pin is inserted into the through hole, the bottom end of the positioning pin can be positioned below the positioning cylinder at intervals.

9. The welding positioning fixture according to claim 7, characterized in that, The fastener includes a base plate, which is disposed at the bottom of the support plate and connects the cylindrical section and the fixing plate.

10. The welding positioning fixture according to claim 9, characterized in that, The support plate has a triangular cross-section, and its three sides are respectively connected to the positioning cylinder, the fixing plate and the bottom plate; The corners of the support plate are chamfered; The base plate has a square cross-section, and its two ends along the radial direction of the positioning cylinder are respectively connected to the positioning cylinder and the fixing plate. The corners of the fixing plate are chamfered.

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