Ship pipeline flange assembling and positioning tool and positioning method thereof

Abstract

The invention belongs to the technical field of positioning tools, and particularly relates to a ship pipeline flange assembling and positioning tool and a positioning method thereof. The ship pipeline flange assembling and positioning tool comprises a tool base frame and a positioning device, a bidirectional flange connection mechanism; a flange limiting mechanism; the flange limiting mechanism is arranged on the front side of the bidirectional flange connecting mechanism and comprises a positioning block, a limiting rod, a movable sliding block, a flange clamping arm, a limiting clamping plate, a connecting gasket, a rotating roller shaft, a flange positioning plate, a hole groove positioning anchor rod, a second motor, a rotating disc, a linear moving arm, a connecting block, an L-shaped support and a driving roller shaft. The flange to be assembled can be rotationally adjusted in the upper flange clamping arm and the lower flange clamping arm according to actual installation requirements, after the flange is completely aligned with the position of a pipeline, welding or bolt connection or other follow-up assembling procedures can be carried out, positioning operation is easy, and assembling efficiency and precision are improved.

Description

Technical Field

[0001] This invention belongs to the field of positioning tooling technology, specifically a positioning tooling for assembling ship pipeline flanges and its positioning method. Background Technology

[0002] Ships have complex internal structures with tens of thousands of piping systems used to transport fuel oil, lubricating oil, water, steam, compressed air, and various chemicals. During the manufacturing and installation of ship piping, pipes are primarily connected by flanges. A flange connection uses a pair of flanges, gaskets, and several bolts and nuts to tightly connect two sections of pipe together, forming a sealed piping system.

[0003] A search revealed that patent CN223289687U discloses a flange pipe assembly and positioning fixture, including a support base, a rotating mechanism, and a positioning mechanism. The rotating mechanism is disposed on the top surface of the support base and includes a rotating bearing fixedly disposed on the top surface of the support base, with a mounting seat fixedly disposed on the inner ring surface of the bearing. The positioning mechanism is disposed on the mounting seat and includes a positioning seat disposed above the mounting seat, with a positioning plate and positioning column assembly cooperating with the positioning seat for positioning and assembling the flange and pipe. This utility model's flange pipe assembly and positioning fixture is simple, easy to use, and highly efficient for the entire positioning and assembly operation between the pipe and the flange.

[0004] However, the aforementioned positioning fixture is designed for positioning and assembling a flange and a pipe, and cannot handle the synchronous positioning and docking of two flanges at the same time. During operation, one end must be assembled first, and then the other end can be assembled, making it impossible to achieve bidirectional synchronous operation. In addition, different positioning components need to be replaced or cumbersome manual adjustments need to be made for flanges of different specifications. It lacks versatility and has a low degree of automation. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning fixture and method for assembling and positioning ship pipeline flanges, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for assembling and positioning marine pipeline flanges, comprising: Tooling base frame; A bidirectional flange connection mechanism; the bidirectional flange connection mechanism is disposed on the upper surface of the tooling base frame, and is used to simultaneously drive two flanges to be assembled to move to the flange assembly positions of two ship pipelines. The bidirectional flange connection mechanism includes: The fixed bracket is mounted on the tooling base frame; A reverse threaded screw, which is rotatably supported on the fixed bracket and driven to rotate by a motor, has two threads with opposite directions of rotation. Two opposing sliding blocks are respectively threaded to the two threaded sections on both sides of the reverse threaded screw. The fixed bracket is provided with a limiting slide rail, and the opposing sliding blocks are slidably engaged with the limiting slide rail. Two opposing drive arms, the lower ends of which are fixedly connected to the two opposing sliding blocks respectively, and the upper ends of which are fixedly connected to the two flange mounting brackets respectively; Two flange mounting brackets, the two flange mounting brackets being driven by the opposing drive arm to move synchronously toward or away from each other; Flange limiting mechanism; the flange limiting mechanism is located on the front side of the bidirectional flange connection mechanism.

[0007] Preferably, there are two limiting rods, which are arranged at the left and right ends of the front side of the flange mounting bracket. The upper and lower ends of the limiting rods are fixedly connected to the inner sides of two positioning blocks. The upper and lower positioning blocks are respectively fixedly connected to the upper and lower ends of the front side of the flange mounting bracket. Movable sliders are provided through the upper and lower sides of the limiting rods, and connecting blocks are fixedly connected to the front side of the movable sliders.

[0008] Preferably, a second motor is fixedly connected to the middle of the rear side of the flange mounting bracket. The output end of the second motor is disposed through the front side of the flange mounting bracket and is connected to a rotating disk. Linear moving arms are provided on the upper left and lower right sides of the front side of the rotating disk, and the inner sides of the two linear moving arms are in contact with the outer edge of the rotating disk. A drive roller is provided on the outer side of the two linear moving arms. The drive roller is rotatably connected to the front side of the L-shaped bracket, and the rear side of the L-shaped bracket is fixedly connected to the front side of the flange mounting bracket.

[0009] Preferably, flange clamping arms are fixedly connected to the inner front ends of the two connecting blocks, and limit plates are fixedly connected to the inner front ends and middle of the two flange clamping arms. Two connecting gaskets are fixedly connected to the inner side of each limit plate. A rotating roller is rotatably connected between two adjacent connecting gaskets. A linkage shaft is provided on the outer side of the connecting gaskets. The linkage shaft is drivenly connected to the rotating roller shaft. The linkage shaft is sleeved inside the linkage belt. A central shaft is provided in the middle of the linkage belt. A rotating column is drivenly connected to the inner end of the central shaft. A guide wedge is fixedly connected to the end of the rotating column away from the central shaft.

[0010] Preferably, a flange positioning plate is provided between the two limiting plates, the flange positioning plate is fixedly connected to the flange clamping arm, and a slotted positioning anchor rod is threadedly connected to the middle of the flange positioning plate.

[0011] Preferably, a fixed bracket is fixedly connected to the upper surface of the tooling base frame, and a limiting groove is formed on the upper surface of the fixed bracket. Two opposing drive arms are slidably connected inside the limiting groove. The lower ends of the two opposing drive arms are respectively fixedly connected to the upper surfaces of two opposing sliding blocks, and the ends of the two opposing drive arms away from the corresponding opposing sliding blocks are respectively fixedly connected to the rear side of the two flange mounting brackets.

[0012] Preferably, each of the two opposing sliding blocks has a threaded ring inside, and a reverse threaded screw is provided through the middle of the two threaded rings. The two opposing sliding blocks are symmetrically arranged on both sides of the reverse threaded screw. A separator ring is fixedly connected to the outer side of the middle of the reverse threaded screw. The inner sides of the two opposing sliding blocks are slidably connected to the outer surface of the limiting slide rail. The limiting slide rail is fixedly connected to the inner surface of the fixed bracket. A connecting piece is fixedly connected to the outer side of each of the two opposing sliding blocks. A toggle piece is fixedly connected to the side of the connecting piece away from the opposing sliding block. Multiple movement indicator pieces are provided on the front side of the toggle piece. Multiple movement indicator pieces are fixedly connected to the rear side of the fixed bracket. The multiple movement indicator pieces are densely distributed in the middle position of the fixed bracket and sparsely distributed on both sides of the fixed bracket.

[0013] Specifically, the movable indicator pieces are thin and flat, with one end fixed to the rear of the fixed bracket and the other end suspended freely. As the sliding block moves, the movable indicator pieces are sequentially moved, causing them to vibrate and produce sound. The indicator pieces in the middle are densely distributed and vibrate at a higher frequency, producing a more continuous sound. Conversely, the indicator pieces on the sides are sparsely distributed and vibrate at a lower frequency, resulting in larger sound intervals. This means that as the flange approaches its final installation position, the movable indicator pieces become denser, and the dense sound alerts the operator that the flange is about to reach its final installation position. Operators can judge the flange's movement status by sound changes without needing to observe the positioning mechanism. Especially when approaching the final installation position, the dense sound alerts the operator that docking is imminent, thereby improving operational safety and efficiency.

[0014] Preferably, the two ends of the reverse threaded screw are rotatably connected to the inner sides of two fixed plates, and the two fixed plates are respectively fixedly connected to the left and right sides inside the fixed bracket.

[0015] Preferably, a motor is fixedly connected to the outer side of one of the fixed plates, and the output end of the motor is connected to a reverse threaded screw drive.

[0016] A method for assembling and positioning a ship's pipe flange includes the following steps: Step 1: Place the flange to be assembled between the flange clamping arms and support it on the rotating roller shaft; start motor 2 to drive the rotating disk to rotate. Through the cooperation of the rotating disk and the linear moving arm, the two flange clamping arms move synchronously towards each other along the limit rod, automatically adapting to and clamping the flange to achieve preliminary center positioning. Step 2: Rotate the slot positioning anchor rod so that the tip of the slot positioning anchor rod is inserted into the bolt hole slot of the flange to be assembled, so as to align the flange hole position. At the same time, using the support of the rotating roller, manually rotate the flange to make fine adjustments to the angle as needed. Step 3: After both flanges are positioned, start motor one to drive the reverse thread screw to rotate, which will cause the two opposing sliding blocks to move synchronously and in opposite directions along the limit slide rail. The opposing sliding blocks push the two flange mounting brackets and the flanges on the flange mounting brackets through the opposing drive arms, moving synchronously towards the two ship pipelines in the middle at the same speed until the flange end face is precisely fitted with the pipeline flange, and the docking is completed.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a flange positioning fixture for ship pipeline assembly, equipped with a flange limiting mechanism. Before flange installation, two flanges to be assembled are placed inside two sets of flange clamping arms, with the lower edges of the flanges to be assembled positioned on the upper surfaces of the two rotating rollers of the same flange clamping arm. Then, a rotating disk is driven by a motor. As the rotating disk rotates, the two linear moving arms move in an alternating up-and-down direction due to the rolling action of the rotating disk and its two sides. At this time, the two flange clamping arms are driven to slide synchronously in opposite directions along the limiting rod to accommodate flanges of different diameters, clamping them at the center of the fixture and ensuring initial center positioning of the flanges. After the flanges are clamped and aligned, the anchor rod is rotated forward so that its tip rests in the upper slot of the flange to be assembled. Then, another rotating anchor rod is rotated, similarly positioning the slots of the other set of flanges to be assembled within the rotating anchor rod. At this point, the slots of the two flanges to be assembled are in the same position, facilitating subsequent bolt installation by workers. Furthermore, during the installation of the rotating anchor rods… Since the flange to be assembled is located within four rotating rollers, it can be rotated and adjusted within the upper and lower flange clamping arms according to actual installation requirements. Once the flange and the pipe are fully aligned, subsequent assembly processes such as welding or bolting can be performed. During the rotation of the flange to be assembled, the rotating rollers drive the linkage shaft to rotate via the transmission connection. The friction between the linkage shaft and the linkage belt transmits power to the inside of the linkage belt, thereby driving the central shaft located in the middle of the linkage belt to rotate synchronously. After receiving the rotational power, the central shaft drives the rotating column at its inner end to rotate, ultimately driving the guide wedge fixedly connected to the end of the rotating column to rotate. The centrifugal wedging effect generated by the guide wedge during rotation ensures that the lower end of the flange to be assembled is always in contact with the connecting gasket, which helps the flange to be assembled maintain its perpendicularity during rotation and prevents the flange from shifting during angle adjustment. This facilitates the quick alignment of the flange with the pipe end face, simplifies the positioning operation, improves assembly efficiency and accuracy, and ensures the stable and reliable quality of the final connection. 2. The ship pipeline flange assembly and positioning fixture of this invention is equipped with a bidirectional flange connection mechanism. After the two flanges to be assembled are positioned, the reverse-threaded screw is driven to rotate by a motor. When the motor drives the screw to rotate, since the threads on both sides rotate in opposite directions, the two opposing sliding blocks are driven to make completely synchronous and opposite linear movements along the screw axis. The linear movement of the opposing sliding blocks is transmitted to the flange mounting bracket in front through the opposing drive arm above them. Therefore, when the two opposing sliding blocks move synchronously towards the middle, they will push the two opposing drive arms, thereby driving the two flange mounting brackets and the flanges clamped on them to move synchronously towards the inner end of the two ship pipelines at the same speed until the flange end face is precisely fitted with the pipeline flange, completing the docking. This ensures that the two flanges to be assembled can reach the flange assembly position of the two ship pipelines simultaneously and at the same distance, avoiding center deviation caused by asynchrony. The movement indicator pieces are thin and fixed at one end to the rear of the fixed bracket, while the other end is suspended freely. As the sliding block moves along with these indicator pieces, they vibrate elastically and produce sound. The indicator pieces in the middle are densely distributed and vibrate at a higher frequency, producing a more continuous sound. The indicator pieces on the sides are sparsely distributed and vibrate at a lower frequency, resulting in larger sound intervals. This means that as the flange approaches its final installation position, the indicator pieces become denser, and the dense sound alerts the operator that the flange is about to reach its final installation position. Operators can judge the flange's movement status by sound changes without needing to observe the positioning mechanism. Especially when approaching the final installation position, the dense sound alerts the operator that docking is imminent, thereby improving operational safety and efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a ship pipeline flange assembly and positioning fixture after assembly, as proposed in this invention. Figure 2 This is a schematic diagram of the rear three-dimensional structure of a ship pipeline flange assembly and positioning fixture after assembly, as proposed in this invention. Figure 3 This is a rear-view three-dimensional structural diagram of a ship pipeline flange assembly and positioning fixture proposed in this invention; Figure 4 This is a rear view partial cross-sectional three-dimensional structural diagram of a ship pipeline flange assembly and positioning fixture proposed in this invention. Figure 5 This is a front view schematic diagram of the flange limiting mechanism in a ship pipeline flange assembly and positioning fixture proposed in this invention; Figure 6 This is a rear-view three-dimensional structural diagram of the flange limiting mechanism in a ship pipeline flange assembly and positioning fixture proposed in this invention; Figure 7This is a partial front view structural diagram of a flange limiting mechanism in a ship pipeline flange assembly and positioning fixture proposed in this invention; Figure 8 This is a rear view partial three-dimensional structural diagram of the flange limiting mechanism in a ship pipeline flange assembly and positioning fixture proposed in this invention.

[0019] In the diagram: 1. Tooling base frame; 2. Bidirectional flange connection mechanism; 201. Fixed bracket; 202. Limiting groove; 203. Reverse threaded screw; 204. Opposing sliding block; 205. Threaded ring; 206. Separator ring; 207. Fixed plate; 208. Motor 1; 209. Limiting slide rail; 210. Opposing drive arm; 211. Flange mounting bracket; 212. Connecting piece; 213. Actuating piece; 214. Movement indicator piece; 3. Flange limiting mechanism; 301. Positioning block; 302. Limiting... 303. Rod; 304. Movable slider; 305. Flange clamping arm; 306. Limiting plate; 307. Connecting gasket; 308. Rotating roller; 309. Flange positioning plate; 310. Groove positioning anchor; 311. Motor II; 312. Rotary disk; 313. Linear moving arm; 314. Connecting block; 315. L-shaped bracket; 316. Drive roller; 317. Linkage shaft; 318. Linkage belt; 319. Central shaft; 320. Rotating column; 320. Guide wedge; 4. Ship pipeline. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-8 The present invention provides two technical solutions, specifically including the following embodiments: Example 1 A positioning fixture for assembling and positioning marine pipe flanges, comprising: Tooling base frame 1; flange limiting mechanism 3; the flange limiting mechanism 3 is located on the front side of the bidirectional flange connection mechanism 2. The flange limiting mechanism 3 includes a positioning block 301, a limiting rod 302, a movable slider 303, a flange clamping arm 304, a limiting plate 305, a connecting gasket 306, a rotating roller 307, a flange positioning plate 308, a slotted positioning anchor rod 309, a motor 310, a rotating disk 311, a linear moving arm 312, a connecting block 313, an L-shaped bracket 314, a drive roller 315, a linkage shaft 316, a linkage belt 317, a central shaft 318, a rotating column 319, and a guide wedge 320. There are two limiting rods 302, which are located on the left and right ends of the front side of the flange mounting frame 211. The upper and lower ends of the 2 are fixedly connected to the inner sides of the two positioning blocks 301. The upper and lower positioning blocks 301 are respectively fixedly connected to the upper and lower ends of the front side of the flange mounting bracket 211. The upper and lower sides of the limiting rod 302 are provided with movable sliders 303. The front side of the movable sliders 303 is fixedly connected to the connecting block 313. The rear middle of the flange mounting bracket 211 is fixedly connected to the motor 310. The output end of the motor 310 is provided through the front side of the flange mounting bracket 211 and is connected to the rotating disk 311. The upper left and lower right sides of the front side of the rotating disk 311 are provided with linear moving arms 312. The inner sides of the two linear moving arms 312 are in contact with the outer edge of the rotating disk 311. The outer sides of the two linear moving arms 312 are provided with drive rollers. Shaft 315, the drive roller shaft 315 is rotatably connected to the front side of L-shaped bracket 314. The rear side of L-shaped bracket 314 is fixedly connected to the front side of flange mounting bracket 211. Flange clamping arms 304 are fixedly connected to the inner front end of two connecting blocks 313. Limiting plates 305 are fixedly connected to the inner front end and middle of the two flange clamping arms 304. Two connecting gaskets 306 are fixedly connected to the inner side of each limiting plate 305. A rotating roller shaft 307 is rotatably connected between two adjacent connecting gaskets 306. A linkage shaft 316 is provided on the outer side of the connecting gaskets 306. The linkage shaft 316 is drively connected to the rotating roller shaft 307. The linkage shaft 316 is sleeved inside the linkage belt 317. A central shaft 318 is provided in the middle of the linkage belt 317. A rotating column 319 is connected to the inner end of the 318 axis. A guide wedge 320 is fixedly connected to the end of the rotating column 319 away from the central axis 318. During flange assembly, the flange to be assembled is positioned above the inclined surface of the guide wedge 320. A flange positioning plate 308 is provided between the two limiting plates 305. The flange positioning plate 308 is fixedly connected to the flange clamping arm 304. A slotted positioning anchor rod 309 is threadedly connected to the middle of the flange positioning plate 308, positioning the flange to be assembled between the upper and lower flange clamping arms 304, with the middle of the flange to be assembled passing through the ship's pipe 4. At the same time, four rotating rollers 307 are located on the inner circumferential side of the flange to be assembled. As the rotating rollers 307 rotate, they drive the linkage shaft 316 to rotate through the transmission connection.Power is transmitted to the interior of the linkage belt 317 via frictional transmission between the belt and the linkage belt 317. This drives the central shaft 318 located in the middle of the linkage belt 317 to rotate synchronously, which in turn drives the rotating column 319 at its inner end to rotate. This, in turn, drives the guide wedge 320 fixedly connected to the end of the rotating column 319 to rotate. The centrifugal wedging effect generated by the guide wedge 320 during rotation helps the flange to be assembled maintain its perpendicularity during rotation, preventing the flange from shifting during angle adjustment, thereby guiding the flange to quickly align with the end face of the pipe.

[0022] During operation, before installing the flanges, the two flanges to be assembled are placed inside the two sets of flange clamping arms 304, with the lower edges of the flanges to be assembled positioned on the upper surfaces of the two rotating rollers 307 of the same flange clamping arm 304. Then, the rotating disk 311 is driven to rotate by the motor 310. As the rotating disk 311 rotates, the rolling action of the rotating disk 311 and its two linear moving arms 312 causes the two linear moving arms 312 to move in an alternating up-and-down direction. At this time, the two flange clamping arms 304 are driven to slide synchronously in opposite directions or in opposite directions along the limiting rod 302 to accommodate flanges of different diameters and clamp them in the center position of the fixture, ensuring the initial centering of the flanges. Once the flanges are clamped... After center alignment, rotate the anchor rod forward so that its tip rests in the upper slot of the flange to be assembled. Then rotate another anchor rod, similarly aligning the slots of the other flange to be assembled within the anchor rod. At this point, the slots of the two flanges to be assembled are in the same position, facilitating subsequent bolt installation. Furthermore, during the installation of the anchor rods, since the flanges to be assembled are within the four rotating rollers 307, they can be rotated and adjusted within the upper and lower flange clamping arms 304 according to actual installation requirements. Once the flanges are fully aligned with the pipe, subsequent assembly processes such as welding or bolting can be performed. The positioning operation is simple, improving assembly efficiency and accuracy, and ensuring the stable and reliable quality of the final connection.

[0023] Example 2 Based on Embodiment 1, a bidirectional flange connection mechanism 2 is provided. The bidirectional flange connection mechanism 2 is mounted on the upper surface of the tooling base frame 1. It is used to simultaneously drive two flanges to be assembled to move towards the flange assembly positions of the two ship pipelines 4. The bidirectional flange connection mechanism 2 includes a fixed bracket 201, a limiting groove 202, a reverse threaded screw 203, a sliding block 204, a threaded ring 205, a separator ring 206, a fixing plate 207, a motor 208, a limiting slide rail 209, a sliding drive arm 210, a flange mounting bracket 211, a connecting piece 212, a toggle piece 213, and a movement indicator piece 214. The fixed bracket 201 is fixedly connected to the upper surface of the tooling base frame 1, and the upper surface of the fixed bracket 201 has a limiting groove 202. The limiting groove 202 has two slidingly connected opposing drive arms 210. The lower ends of the two opposing drive arms 210 are fixedly connected to the upper surfaces of two opposing sliding blocks 204. The ends of the two opposing drive arms 210 away from the opposing sliding blocks 204 are fixedly connected to the rear sides of two flange mounting brackets 211. Each of the two opposing sliding blocks 204 has a threaded ring 205 inside. A reverse threaded screw 203 is passed through the middle of the two threaded rings 205. The two opposing sliding blocks 204 are symmetrically arranged on both sides of the reverse threaded screw 203. A separator ring 206 is fixedly connected to the outer side of the middle part of the reverse threaded screw 203. The inner sides of the two opposing sliding blocks 204 are slidably connected to the outer surface of the limiting slide rail 209. 209 is fixedly connected to the inner surface of the fixed bracket 201. Connecting plates 212 are fixedly connected to the outer sides of both opposing sliding blocks 204. A toggle plate 213 is fixedly connected to the side of the connecting plate 212 away from the opposing sliding block 204. Each movement indicator plate 214 is made of spring steel with a certain elasticity. Multiple movement indicator plates 214 are provided on the front side of the toggle plate 213. These multiple movement indicator plates 214 are fixedly connected to the rear side of the fixed bracket 201. The multiple movement indicator plates 214 are densely distributed in the middle of the fixed bracket 201 and sparsely distributed on both sides of the fixed bracket 201. The two ends of the reverse threaded screw 203 are rotatably connected to the inner sides of two fixed plates 207. 7 are fixedly connected to the left and right sides inside the fixed bracket 201 respectively. A motor 208 is fixedly connected to the outer side of one of the fixed plates 207. The output end of the motor 208 is connected to the reverse threaded screw 203. After the two flanges to be assembled are positioned, the reverse threaded screw 203 is driven to rotate by the motor 208. When the motor 208 drives the screw to rotate, because the threads on both sides rotate in opposite directions, the two opposing sliding blocks 204 are driven to make completely synchronous and opposite linear movements along the screw axis. The linear movement of the opposing sliding blocks 204 is transmitted to the flange mounting bracket 211 in front through the opposing drive arm 210 above them. Therefore, when the two opposing sliding blocks 204 move synchronously towards the center, they will push the two opposing drive arms 210.This causes the two flange mounting brackets 211 and the flanges clamped on them to move synchronously towards the inner ends of the two ship pipes 4 at equal speeds until the flange end faces are precisely fitted with the pipe flanges, completing the docking. This ensures that the two flanges to be assembled can reach the flange assembly positions of the two ship pipes 4 simultaneously and at equal distances, avoiding center offset caused by asynchrony. The moving indicator plate 214 is thin in shape, with one end fixed to the rear side of the fixed bracket 201 and the other end suspended freely. When the actuating plate 213 moves along with the sliding block 204 and sequentially actuates these moving indicator plates 214, the moving indicator plates 214 will emit a sound due to elastic vibration. The sound emitted by the densely distributed, high-frequency moving indicator plates 214 in the middle position produces a more continuous sound, while the sparsely distributed plates on the sides produce a lower-frequency, more spaced sound. This design allows the moving indicator plates 214 to become denser as the flange approaches its final installation position, providing a clear audio signal to the operator that the flange is nearing its destination. This allows operators to judge the flange's movement status through sound changes without needing to observe the positioning mechanism. Especially when approaching the final installation position, the dense sound alerts the operator that docking is imminent, thus improving operational safety and efficiency.

[0024] A method for assembling and positioning a ship's pipe flange includes the following steps: Step 1: Place the flange to be assembled between the flange clamping arms 304 and support it on the rotating roller 307; start the motor 310 to drive the rotating disk 311 to rotate. Through the cooperation of the rotating disk 311 and the linear moving arm 312, the two flange clamping arms 304 move synchronously towards each other along the limiting rod 302, automatically adapting to and clamping the flange to achieve preliminary center positioning. Step 2: Rotate the slot positioning anchor 309 so that the tip of the slot positioning anchor 309 is inserted into the bolt hole slot of the flange to be assembled to align the flange hole position. At the same time, using the supporting effect of the rotating roller 307, manually rotate the flange as needed to make fine adjustments to the angle. Step 3: After both flanges are positioned, start motor 208 to drive the reverse thread screw 203 to rotate, which in turn drives the two opposing sliding blocks 204 to move synchronously and in opposite directions along the limit slide rail 209. The opposing sliding blocks 204 push the two flange mounting brackets 211 and the flanges on the flange mounting brackets 211 through the opposing drive arm 210 to move synchronously towards the two ship pipes 4 in the middle at the same speed until the flange end face is precisely fitted with the pipe flange, thus completing the docking.

[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the application should be included within the protection scope of the present invention.

Claims

1. A positioning fixture for assembling and positioning marine pipeline flanges, characterized in that, include: Tooling base frame (1); A bidirectional flange connection mechanism (2); the bidirectional flange connection mechanism (2) is disposed on the upper surface of the tooling base frame (1), and the bidirectional flange connection mechanism (2) is used to simultaneously drive two flanges to be assembled to move to the flange assembly positions of two ship pipelines (4). The bidirectional flange connection mechanism (2) includes: A fixed bracket (201) is provided on the tooling base frame (1); A reverse threaded screw (203) is rotatably supported on the fixed bracket (201) and driven to rotate by a motor (208). The reverse threaded screw (203) has two threads with opposite directions of rotation. Two opposing sliding blocks (204) are respectively threaded to the two threaded sections on both sides of the reverse threaded screw (203). The fixed bracket (201) is provided with a limiting slide rail (209). The opposing sliding blocks (204) are slidably engaged with the limiting slide rail (209). Two opposing drive arms (210), the lower ends of the two opposing drive arms (210) are fixedly connected to the two opposing sliding blocks (204) respectively, and the upper ends are fixedly connected to the two flange mounting brackets (211) respectively; Two flange mounting brackets (211) are driven by the opposing drive arm (210) to move synchronously toward or away from each other; Flange limiting mechanism (3); the flange limiting mechanism (3) is located on the front side of the bidirectional flange connection mechanism (2).

2. The ship pipeline flange assembly and positioning fixture according to claim 1, characterized in that, There are two limiting rods (302), which are set at the left and right ends of the front side of the flange mounting bracket (211). The upper and lower ends of the limiting rods (302) are fixedly connected to the inner side of two positioning blocks (301). The upper and lower positioning blocks (301) are respectively fixedly connected to the upper and lower ends of the front side of the flange mounting bracket (211). Movable sliders (303) are provided through the upper and lower sides of the limiting rods (302). A connecting block (313) is fixedly connected to the front side of the movable sliders (303).

3. The ship pipeline flange assembly and positioning fixture according to claim 1, characterized in that, A second motor (310) is fixedly connected to the middle of the rear side of the flange mounting bracket (211). The output end of the second motor (310) is disposed through the front side of the flange mounting bracket (211) and is connected to a rotating disk (311). A linear moving arm (312) is provided on the upper left and lower right front side of the rotating disk (311). The inner sides of the two linear moving arms (312) are in contact with the outer edge of the rotating disk (311). A drive roller shaft (315) is provided on the outer side of the two linear moving arms (312). The drive roller shaft (315) is rotatably connected to the front side of the L-shaped bracket (314). The rear side of the L-shaped bracket (314) is fixedly connected to the front side of the flange mounting bracket (211).

4. The ship pipeline flange assembly and positioning fixture according to claim 2, characterized in that, Flange clamping arms (304) are fixedly connected to the inner front ends of the two connecting blocks (313). Limiting plates (305) are fixedly connected to the inner front ends and middle of the two flange clamping arms (304). Two connecting gaskets (306) are fixedly connected to the inner side of each limiting plate (305). A rotating roller shaft (307) is rotatably connected between two adjacent connecting gaskets (306). A linkage shaft (316) is provided on the outer side of the connecting gasket (306). The linkage shaft (316) is drivenly connected to the rotating roller shaft (307). The linkage shaft (316) is sleeved inside the linkage belt (317). A central shaft (318) is provided in the middle of the linkage belt (317). A rotating column (319) is drivenly connected to the inner end of the central shaft (318). A guide wedge (320) is fixedly connected to the end of the rotating column (319) away from the central shaft (318).

5. The ship pipeline flange assembly and positioning fixture according to claim 4, characterized in that, A flange positioning plate (308) is provided between the two limiting plates (305). The flange positioning plate (308) is fixedly connected to the flange clamping arm (304). A slotted positioning anchor rod (309) is threadedly connected to the middle of the flange positioning plate (308).

6. The ship pipeline flange assembly and positioning fixture according to claim 1, characterized in that, The upper surface of the tooling base frame (1) is fixedly connected to a fixed bracket (201). A limiting groove (202) is opened on the upper surface of the fixed bracket (201). Two opposing drive arms (210) are slidably connected inside the limiting groove (202). The lower ends of the two opposing drive arms (210) are respectively fixedly connected to the upper surfaces of two opposing sliding blocks (204). The ends of the two opposing drive arms (210) away from the opposing opposing sliding blocks (204) are respectively fixedly connected to the rear side of two flange mounting brackets (211).

7. The ship pipeline flange assembly and positioning fixture according to claim 6, characterized in that, Both of the two opposing sliding blocks (204) are internally provided with threaded rings (205), and a reverse threaded screw (203) is provided through the middle of the two threaded rings (205). The two opposing sliding blocks (204) are symmetrically arranged on both sides of the reverse threaded screw (203). A separator ring (206) is fixedly connected to the outer side of the middle part of the reverse threaded screw (203). The inner sides of the two opposing sliding blocks (204) are slidably connected to the outer surface of the limiting slide rail (209). The limiting slide rail (209) is fixedly connected to the inner surface of the fixed bracket (201). A connecting piece (212) is fixedly connected to the outer side of the sliding block (204). A toggle piece (213) is fixedly connected to the side of the connecting piece (212) away from the sliding block (204). A plurality of movement prompt pieces (214) are provided on the front side of the toggle piece (213). The plurality of movement prompt pieces (214) are fixedly connected to the rear side of the fixed bracket (201). The plurality of movement prompt pieces (214) are densely distributed in the middle position of the fixed bracket (201) and sparsely distributed on both sides of the fixed bracket (201).

8. The ship pipeline flange assembly and positioning fixture according to claim 7, characterized in that, The two ends of the reverse threaded screw (203) are rotatably connected to the inner sides of two fixed plates (207), and the two fixed plates (207) are respectively fixedly connected to the left and right sides inside the fixed bracket (201).

9. A positioning fixture for assembling and positioning marine pipeline flanges according to claim 5, characterized in that, One of the fixed plates (207) is fixedly connected to a motor (208) on its outer side, and the output end of the motor (208) is connected to a reverse threaded screw (203) for transmission.

10. A method for assembling and positioning a ship's pipeline flange, based on any one of the ship's pipeline flange assembly and positioning fixtures according to claims 1-9, characterized in that, Includes the following steps: Step 1: Place the flange to be assembled between the flange clamping arms (304) and support it on the rotating roller (307); start the second motor (310) to drive the rotating disk (311) to rotate. Through the cooperation of the rotating disk (311) and the linear moving arm (312), the two flange clamping arms (304) move synchronously towards each other along the limit rod (302), automatically adapting to and clamping the flange to achieve preliminary center positioning. Step 2: Rotate the slot positioning anchor rod (309) so that the tip of the slot positioning anchor rod (309) is inserted into the bolt hole slot of the flange to be assembled, so as to align the flange hole position. At the same time, use the supporting action of the rotating roller (307) to manually rotate the flange to make fine adjustments to the angle as needed. Step 3: After both flanges are positioned, start motor 1 (208) to drive the reverse thread screw (203) to rotate, which will drive the two opposing sliding blocks (204) to make synchronous and opposite linear movements along the limit slide rail (209). The opposing sliding blocks (204) push the two flange mounting brackets (211) and the flanges on the flange mounting brackets (211) through the opposing drive arm (210) to move synchronously towards the two ship pipes (4) in the middle at the same speed until the flange end face is precisely fitted with the pipe flange to complete the docking.

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