A method for manufacturing a sliding block track of a trailing suction dredger
By dividing the slider track structure within the hull sections and controlling the amount of welding deformation, the problems of low construction efficiency and large machining volume in the slider track manufacturing process were solved, achieving high-precision manufacturing and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-07
- Publication Date
- 2026-03-24
AI Technical Summary
In the existing technology, the manufacturing process of slider tracks suffers from problems such as low construction efficiency, large machining workload, and high cost, making it difficult to meet the requirements of high-precision manufacturing.
The slider track structure is manufactured in sections within the hull sections to control the accuracy of the hull structure and the amount of welding deformation of the track. The subsequent machining is reduced by moving the process forward, and the installation process is optimized.
It effectively shortens the construction cycle and cost, improves the manufacturing precision and installation efficiency of the slider rail, and reduces the construction difficulty.
Smart Images
Figure CN121469812B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of shipbuilding, in particular to a method for manufacturing a sliding block track of a drag suction dredger. BACKGROUND
[0002] The sliding block track is two T-shaped vertical structures welded on the recessed structure of the side plate of the ship body structure, including a T-shaped track, auxiliary structures, and a ship body wedge. The sliding block track serves as both a slide for lowering the drag arm pipe into the water and a connecting hinge point between the drag arm pipe and the main ship body. The manufacturing precision of the sliding block track determines whether the sliding block can be smoothly lowered and affects the efficiency of dredging operations. Therefore, the assembly and welding of the sliding block track is a key control point in the construction process.
[0003] The important function of the sliding block guide rail on the dredger determines that the manufacturing and installation precision of the track is high, and the straightness deviation of the track is ±2mm. In order to prevent the track from deforming too much after installation and causing the sliding rail size to be out of tolerance, there are two previous methods:
[0004] Option 1: The sliding block track is installed after the ship body is closed, and the important welds are vertical. The construction efficiency is low, and finally large equipment is used for on-site machining in the dock. The tooling is difficult to assemble and disassemble, the construction is difficult, the construction period is long, and the cost is high.
[0005] Option 2: The sliding block track is separately manufactured as a small section. Although the welding efficiency of the track is improved and the weld formation is slightly better, the thickness of the track panel increases in the direction of the size, and machining of the upper and lower surfaces and the side surface of the section is required after the section structure is manufactured, resulting in a large amount of machining work and a long machining period.
[0006] Therefore, the present application proposes a method for manufacturing a sliding block track of a drag suction dredger to solve the above problems. SUMMARY
[0007] The technical problem to be solved by the present application is to provide a method for manufacturing a sliding block track of a drag suction dredger, which can reduce the difficulty of structure manufacturing and reduce the amount of machining work.
[0008] To solve the above technical problems, the technical solution of the present application is as follows: a method for manufacturing a sliding block track of a drag suction dredger, the innovation point of which is as follows:
[0009] Step 1: Section division of the sliding block track structure: when the ship body is divided into sections, the entire sliding block track and the ship body structure where the sliding block track is located are divided into the same section according to the lifting capacity of the equipment and the length of the sliding block track.
[0010] Step 2: Manufacturing of the ship body structure of the section where the sliding block track is located: first, the ship body structure of the section where the sliding block track is located is assembled and welded, and the manufacturing precision of the ship body structure is controlled within ±4mm.
[0011] Step 3, slider track welding and deformation control: after the welding of the ship body structure of the section where the slider track is located is completed, the slider track is installed and welded, and the deformation control is performed to control the flatness of the slider track within ±2mm;
[0012] Step 4, side suction installation: after the welding of the slider track is completed, the side suction is fine-tuned and positioned according to the flatness data of the slider track;
[0013] Step 5, slider track and suction machining: the inner side of the slider track and the suction ring are machined using machining equipment, and the machining precision is controlled within ±1mm;
[0014] Step 6, ship body wedge installation: after the machining of the slider track and the suction is completed, the ship body wedge is positioned and installed according to the height data of the suction;
[0015] Step 7, slider track section closing and precision control: after the main ship body structure of the mud tank section of the dredger is closed and welded, the slider track sections are positioned and welded;
[0016] Step 8, slider installation and debugging: after the main ship body of the dredger is welded, the slider installation and debugging are performed;
[0017] Step 9, butterfly door function debugging: before the dredger is launched, the butterfly door function test is performed to check the contact surface fit between the butterfly door and the side suction.
[0018] Further, the detailed process of the ship body structure manufacturing of the section where the slider track of step 2 is located includes:
[0019] First, the ship body outer plate is welded, then the outer plate is used as the bottom plate of the jig frame, the reverse section structure is installed, after the welding of the reverse section structure is completed, the section structure is turned over, leveled and fixed, and the front section structure is welded.
[0020] Further, the detailed process of the slider track welding and deformation control of step 3 includes:
[0021] After the ship body structure manufacturing of the section where the slider track is located is completed, the free state of the section of the ship body structure is adjusted horizontally, then the total station and the line positioning are used to position the slider track, after the slider track is adjusted and positioned, the angle steel or channel steel is used as the fixed tooling to rigidly fix the slider track, the track flatness and the opening data of the slider track are checked and measured, then the slider track web plate and the section ship body structure weld are symmetrically welded, and the slider track panel and the slider track web plate weld are symmetrically welded, the flatness data of the slider track is measured and recorded during the welding process, when the flatness deviation of the slider track exceeds ±2mm, the welding sequence needs to be adjusted, and the straightness of the slider track panel after welding is required to be controlled within ±2mm / 4m.
[0022] Furthermore, the detailed process of installing the side suction port in step 4 includes:
[0023] After the slider rail is welded, the fixing fixture is disassembled, and the flatness data of the slider rail is measured and recorded. When measuring the steel wire, two brackets need to be added in the middle of the steel wire to prevent the steel wire from sagging. Based on the actual position data of the slider rail, the center line of the slider rail after machining is measured and determined, and the machining amount on the side of the slider rail is determined by marking. Then, the machining line of the slider rail and the center punch mark are marked on the slider rail panel. According to the machining line of the slider rail, the cast steel part of the side suction port and the suction port buckle are positioned and welded.
[0024] Furthermore, the detailed process of machining the slider track and suction nozzle in step 5 includes:
[0025] First, the suction port is machined. During the machining process, the end face of the suction port buckle needs to be leveled. After machining, it should be parallel to the slider track surface. Measure the thickness data of the machined suction port buckle in different positions. Machin the corresponding connecting plate and guide plate, install and polish them smooth. After the suction port is machined, the slider track is machined according to the actual position of the suction port on the hull. After the slider track is machined, install the box structure inside the two slider tracks.
[0026] Furthermore, during the installation of the hull wedge in step 6, after the hull wedge is adjusted into place, it is fixed by spot welding, without welding.
[0027] Furthermore, in step 7, during the assembly and precision control of the slider track segments, the completed slider track segments are first transported to the predetermined site, leveled, and the flatness data of the slider track is checked. Then, the slider track segments are positioned on the main hull structure. The bow and stern directions of the slider track segments are positioned with the center of the suction port, and the left and right directions must ensure that the slider track is perpendicular. The slider track segments are then welded using low current and symmetrical station welding.
[0028] Furthermore, the detailed process of installing and debugging the slider in step 8 includes:
[0029] First, lower the slider from the slider track to the theoretical height. Use blue oil and a feeler gauge to check the fit between the slider and the suction port plane and the hull wedge. Adjust the wedges on the slider and the hull wedges to ensure that the local gap between the slider and the suction port plane is no more than 0.5mm. Then, use a low current to weld the hull wedge. After the plane fit adjustment is qualified, lock the wedge on the slider with adjusting screws and fix it with electric welding.
[0030] Furthermore, the detailed process of debugging the butterfly door function in step 9 includes:
[0031] First, lower the butterfly door to the theoretical data position, spot weld the butterfly door adjustment wedge to fix it, then inflate the butterfly door air tube, check the fit between the butterfly door sealing surface and the suction port, and discard and recycle the butterfly door after the inspection is qualified, and weld the butterfly door adjustment wedge firmly.
[0032] The advantages of this invention are:
[0033] The manufacturing method of this invention reduces the workload of subsequent structural manufacturing by advancing the process and welding the slider rail on segments; the optimization of the rail installation process improves the flatness of the rail manufacturing by controlling the amount of rail welding deformation, reduces the amount of rail machining, and effectively shortens the construction cycle and cost. Attached Figure Description
[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0035] Figure 1 This is a flowchart of the method for manufacturing the slider track of the trailing suction hopper dredger according to the present invention.
[0036] Figure 2 This is a schematic diagram of the segmented slider track structure of the present invention.
[0037] Figure 3 This is a flowchart illustrating the segmented manufacturing process of the slider track according to the present invention.
[0038] Figure 4 This is a cross-sectional view of the slider track segment at the suction port of the present invention.
[0039] Figure 5 This is a schematic diagram of the slider of the present invention installed on the slider track segment.
[0040] Figure 6 This is a schematic diagram of the butterfly door of the present invention installed at the segmented suction port of the slider track. Detailed Implementation
[0041] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0042] Example
[0043] This embodiment provides a method for manufacturing the sliding block track of a trailing suction hopper dredger, such as... Figures 1-6 As shown, it includes the following steps:
[0044] Step 1: Segmentation of the slider rail structure: When segmenting the hull, based on the lifting capacity of the equipment and the length of the slider rail, the entire slider rail and the hull structure where the slider rail is located are divided into the same segment, such as... Figure 2As shown, the slider track segment includes a hull structure 1, two slider tracks 2 located on the side wall of the hull structure 1, a box structure 3 located between the two slider tracks 2, a suction port 4 located below the slider track 2, and two hull wedges 5 located on both sides of the suction port respectively.
[0045] Step 2, Manufacturing of the hull structure of the section where the slider track is located: First, assemble and weld the hull structure 1 of the section where the slider track is located. The manufacturing accuracy of hull structure 1 is controlled within ±4mm.
[0046] The detailed manufacturing process of the hull structure of the section where the slider track is located includes: first, the outer plate of the hull is spliced and welded, then the outer plate is used as the base plate of the jig to install the reverse structure of the section. After the reverse structure of the section is welded, the section structure is turned over, the section is leveled and fixed, and the front structure of the section is welded.
[0047] Step 3, Welding and Deformation Control of Slider Rail: After the welding of the hull structure 1 where the slider rail is located is completed, the slider rail 2 is installed and welded. At the same time, the deformation is controlled to keep the flatness of the slider rail 2 within ±2mm.
[0048] The detailed process of welding and deformation control of the slider rail includes: After the hull structure 1 of the section where the slider rail is located is manufactured, the hull structure of the section is adjusted to be level in a free state. Then, the slider rail 2 is positioned using a total station and a string line. After the slider rail 2 is positioned, angle steel or channel steel is used as a fixing tool to rigidly fix the slider rail 2. The flatness and opening data of the slider rail are checked and measured. Then, the weld between the web of the slider rail 2 and the section of the hull structure 1 is welded symmetrically. Then, the weld between the panel of the slider rail 2 and the web of the slider rail 2 is welded symmetrically. During the welding process, the flatness data of the slider rail is measured and recorded. When the flatness deviation of the slider rail 2 exceeds ±2mm, the welding sequence needs to be adjusted. After the panel of the slider rail 2 is welded, the straightness is required to be controlled within ±2mm / 4m.
[0049] Step 4, Side suction port installation: After the slider rail 2 is welded, the side suction port 4 is finely positioned and welded according to the flatness data of the slider rail;
[0050] The detailed process of installing the side suction port includes: after the sliding rail 2 is welded, the fixing fixture is disassembled, the flatness data of the sliding rail is measured and recorded, and two brackets need to be added in the middle of the steel wire to prevent the steel wire from sagging when measuring the steel wire; according to the actual position data of the sliding rail 2, the center line of the sliding rail 2 after machining is measured and determined, and the machining amount of the side of the sliding rail 2 is determined by marking. Then, the machining line of the sliding rail 2 and the center punch mark are marked on the panel of the sliding rail 2. According to the machining line of the sliding rail 2, the cast steel part of the side suction port 4 and the suction port buckle 41 are positioned and welded.
[0051] Step 5: Machining of slider track and suction port: Machining is performed on the inner side of slider track 2 and suction port 4 buckle using machining equipment. The machining accuracy is controlled within ±1mm.
[0052] The detailed process of machining the slider track and suction port includes: first, machining the suction port 4; during the machining of the suction port 4, the end face of the suction port buckle 41 needs to be leveled and parallel to the slider track surface after machining; measuring the thickness data of the machined suction port buckle 41 and recording the thickness data in different positions; machining the corresponding connecting plate and guide plate and installing and polishing them; after the suction port 4 is machined, the slider track 2 is machined according to the actual position of the suction port 41 on the hull; after the slider track 2 is machined, the box structure 3 inside the two slider tracks 2 is installed.
[0053] Step 6, Hull wedge installation: After the slider rail 2 and suction port 4 are machined, the hull wedge 5 is positioned and installed according to the height data of suction port 4; when installing the hull wedge 5, after the hull wedge 5 is adjusted into place, it is spot welded and fixed, without welding.
[0054] Step 7, Sliding rail segment assembly and precision control: After the main hull structure of the dredger's mud compartment section is assembled and welded, the sliding rail segments are positioned and welded.
[0055] During the assembly and precision control of the slider rail segments, the completed slider rail segments are first transported to the designated site, leveled, and the flatness data of the slider rail is checked. Then, the slider rail segments are positioned on the main hull structure. The bow and stern directions of the slider rail segments are positioned with the center of the suction port, and the left and right directions must ensure that the slider rail is perpendicular. The slider rail segments are then welded using low current and symmetrical station welding.
[0056] Step 8: Sliding block installation and debugging: After the main hull of the dredger is welded, the sliding block is installed and debugged.
[0057] The detailed process of slider installation and debugging includes: First, lower slider 6 from slider track 2 to the theoretical height, such as... Figure 5 As shown, use blue oil and feeler gauge to check the fit between slider 6 and the plane of suction port 4 and hull wedge 5. Adjust the wedges on slider 6 and hull wedge 5 to ensure that the local gap between slider and suction port plane is no more than 0.5mm. Then, use low current to weld hull wedge 5. After the plane fit adjustment is qualified, the wedge on slider 6 is locked with adjusting screws and fixed by electric welding.
[0058] Step 9, Butterfly door function test: Before the dredger is launched, conduct a butterfly door function test to check the fit between the butterfly door and the side suction port.
[0059] The detailed process of butterfly door function debugging includes: first, lowering butterfly door 7 to the theoretical data position, spot welding the butterfly door 7 adjustment wedge block to fix it, then inflating the butterfly door 7 air tire, checking the fit between the butterfly door 7 sealing surface and the suction port, and after the inspection is qualified, discarding and recycling butterfly door 7, and welding the butterfly door 7 adjustment wedge block firmly.
[0060] The manufacturing method of this invention reduces the workload of subsequent structural manufacturing by advancing the process and welding the slider rail on segments; the optimization of the rail installation process improves the flatness of the rail manufacturing by controlling the amount of rail welding deformation, reduces the amount of rail machining, and effectively shortens the construction cycle and cost.
[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A method for manufacturing a sliding block track for a trailing suction hopper dredger, characterized in that: Includes the following steps: Step 1: Segmentation of the slider rail structure: When dividing the hull into segments, the entire slider rail and the hull structure where the slider rail is located are divided into the same segment according to the lifting capacity of the equipment and the length of the slider rail. Step 2, Manufacturing of the hull structure of the section where the slider track is located: First, assemble and weld the hull structure of the section where the slider track is located. The manufacturing accuracy of the hull structure is controlled within ±4mm. The detailed manufacturing process of the hull structure of the segment containing the slider track in step 2 includes: First, the outer hull plate is spliced and welded. Then, the outer hull plate is used as the base plate of the jig to install the segmented reverse structure. After the segmented reverse structure is welded, the segmented structure is turned over, the segments are leveled and fixed, and the segmented front structure is welded. Step 3, Welding and Deformation Control of Slider Rail: After the welding of the hull structure of the section where the slider rail is located is completed, the slider rail is installed and welded, and the deformation is controlled at the same time to keep the flatness of the slider rail within ±2mm. Step 4, Side suction port installation: After the slider rail is welded, fine-tune and position the side suction port according to the slider rail flatness data; Step 5: Machining of slider track and suction port: Machining is performed on the inner side of slider track and suction port buckle using machining equipment, with machining accuracy controlled within ±1mm; Step 6, Hull wedge installation: After the slider rail and suction port are processed, locate and install the hull wedge according to the suction port height data; Step 7, Sliding rail segment assembly and precision control: After the main hull structure of the dredger's mud compartment section is assembled and welded, the sliding rail segments are positioned and welded. In step 7, when the slider rail segments are assembled and the precision is controlled, the completed slider rail segments are first transported to the predetermined site, the level is adjusted, the flatness data of the slider rail is checked, and then the slider rail segments are positioned on the main hull structure. The bow and stern directions of the slider rail segments are positioned with the center of the suction port, and the left and right directions must ensure that the slider rail is perpendicular. The slider rail segments are then welded using low current and symmetrical station welding. Step 8: Sliding block installation and debugging: After the main hull of the dredger is welded, the sliding block is installed and debugged. Step 9, Butterfly door function test: Before the dredger is launched, conduct a butterfly door function test to check the fit between the butterfly door and the side suction port.
2. The method for manufacturing the sliding block track of a trailing suction hopper dredger according to claim 1, characterized in that: The detailed process of welding and controlling deformation of the slider track in step 3 includes: After the hull structure of the section containing the slider rail is manufactured, the section of the hull structure is adjusted to be level in a free state. Then, a total station and a string line are used to position the slider rail. After the slider rail is adjusted and positioned, angle steel or channel steel is used as a fixing tool to rigidly fix the slider rail. The flatness and opening data of the slider rail are checked and measured. Then, the welds between the web of the slider rail and the section of the hull structure are welded symmetrically first, and then the welds between the slider rail panel and the slider rail web are welded symmetrically. During the welding process, the flatness data of the slider rail is measured and recorded. When the flatness deviation of the slider rail exceeds ±2mm, the welding sequence needs to be adjusted. After the slider rail panel is welded, the straightness is required to be controlled within ±2mm / 4m.
3. The method for manufacturing the sliding block track of a trailing suction hopper dredger according to claim 1, characterized in that: The detailed process of installing the side suction port in step 4 includes: After the slider rail is welded, the fixing fixture is disassembled, and the flatness data of the slider rail is measured and recorded. When measuring the steel wire, two brackets need to be added in the middle of the steel wire to prevent the steel wire from sagging. Based on the actual position data of the slider rail, the center line of the slider rail after machining is measured and determined, and the machining amount on the side of the slider rail is determined by marking. Then, the machining line of the slider rail and the center punch mark are marked on the slider rail panel. According to the machining line of the slider rail, the cast steel part of the side suction port and the suction port buckle are positioned and welded.
4. The method for manufacturing the sliding block track of a trailing suction hopper dredger according to claim 1, characterized in that: The detailed process of machining the slider track and suction nozzle in step 5 includes: First, the suction port is machined. During the machining process, the end face of the suction port buckle needs to be leveled. After machining, it should be parallel to the slider track surface. Measure the thickness data of the machined suction port buckle in different positions. Machin the corresponding connecting plate and guide plate, install and polish them smooth. After the suction port is machined, the slider track is machined according to the actual position of the suction port on the hull. After the slider track is machined, install the box structure inside the two slider tracks.
5. The method for manufacturing the sliding block track of a trailing suction hopper dredger according to claim 1, characterized in that: In step 6, when installing the hull wedge, after the hull wedge is adjusted into place, it is spot welded in place, without welding.
6. The method for manufacturing the sliding block track of a trailing suction hopper dredger according to claim 1, characterized in that: The detailed process of installing and debugging the slider in step 8 includes: First, lower the slider from the slider track to the theoretical height. Use blue oil and a feeler gauge to check the fit between the slider and the suction port plane and the hull wedge. Adjust the wedges on the slider and the hull wedges to ensure that the local gap between the slider and the suction port plane is no more than 0.5mm. Then, use a low current to weld the hull wedge. After the plane fit adjustment is qualified, lock the wedge on the slider with adjusting screws and fix it with electric welding.
7. The method for manufacturing the sliding block track of a trailing suction hopper dredger according to claim 1, characterized in that: The detailed process of debugging the butterfly door function in step 9 includes: First, lower the butterfly door to the theoretical data position, spot weld the butterfly door adjustment wedge to fix it, then inflate the butterfly door air tube, check the fit between the butterfly door sealing surface and the suction port, and discard and recycle the butterfly door after the inspection is qualified, and weld the butterfly door adjustment wedge firmly.
Citation Information
Patent Citations
Mud hold area construction method for self-propelled drag suction dredger ship
CN103910039A
Segmenting method for self-propelled cutter suction dredger
CN109552555A