A fixing device for hoisting of a ship chimney in later maintenance
Patent Information
- Application Number
- CN202522158459.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-10-13
AI Technical Summary
[0004]为了解决钢板围井吊装结构更换挂钩不便等问题，本申请提供一种船舶烟囱后期维护吊装用固定装置
1.通过带孔座板、囱船体开孔和圆钢吊具等设置，圆钢吊具支持吊篮滑动作业，省去了传统方式中在不同固定挂钩间繁琐更换操作，提升维护效率，带孔座板采用内外部实施焊接的方式，有效增强了抗腐蚀能力，带孔座板沿船体烟囱周向均匀分布开孔，降低了坠落风险，即使外部焊缝处腐蚀开裂，插入式焊接形式也能防止吊具坠落，为维护人员提供可靠安全保障，同时该装置的应用减少了脚手架的使用成本，降低维护作业的费用，且装置造型简洁与烟囱整体风格协调统一，不影响船舶外观；
Smart Images
Figure CN224715199U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of shipbuilding technology, and in particular to a fixing device for hoisting and maintaining ship chimneys during later maintenance. Background Technology
[0002] During the long-term operation of ships, the maintenance of large ship funnels is crucial and ongoing. As a key component of a ship, the funnel not only plays a vital role in emitting exhaust gases, but its appearance also directly affects the overall image of the ship. Because ships sail in the marine environment, funnels are exposed to complex and harsh conditions for extended periods, which presents numerous challenges for maintenance. The hoisting process is a critical step in maintenance operations. Crew members need to periodically approach the funnel to remove rust caused by corrosion and repaint it to meet the ship's structural safety and aesthetic requirements.
[0003] Currently, most large ships use steel plate cofferdams at the top of their chimneys, with a ring of lifting lugs around the chimney as hook points for chimney maintenance hoisting devices. Because the lifting lugs at the top of the chimney are fixed in position, changing the hooks is extremely inconvenient, reducing maintenance efficiency, increasing the difficulty for crew members, and posing significant safety hazards. Furthermore, while erecting scaffolding for maintenance work can solve the hoisting problem to some extent, it is costly and has a long dismantling and assembly cycle, thus requiring improvement. Utility Model Content
[0004] To address the inconvenience of replacing hooks in steel plate cofferdam hoisting structures, this application provides a fixing device for hoisting and maintaining ship chimneys during later stages of maintenance.
[0005] The technical solution for a fixing device for later maintenance of a ship's chimney provided in this application is as follows: A fixing device for hoisting during the later maintenance of a ship's funnel includes perforated base plates arranged on the funnel. Multiple sets of perforated base plates are equidistantly arranged along the circumferential direction of the funnel. A plurality of funnel hull openings are equidistantly drilled through the top of the funnel along the circumferential direction. The number of funnel hull openings is consistent with the number of perforated base plates. The perforated base plates are inserted into corresponding funnel hull openings and welded to the funnel. A round steel lifting device is arranged around the outside of the funnel. Each set of perforated base plates has an inner hole for the lifting device. The round steel lifting device passes sequentially through the inner holes of the perforated base plates. The diameter of the round steel lifting device is smaller than the diameter of the inner hole of the perforated base plate.
[0006] Because the lifting lugs at the top of the chimney are fixed, it is extremely inconvenient to replace the hooks when using the lifting equipment, which greatly reduces the efficiency of maintenance work, increases the difficulty of operation for the crew, and also brings great safety hazards. In addition, if the existing lifting lug structure is not used and a separate scaffold is erected for maintenance work, although the lifting problem can be solved to some extent, the cost is high and the disassembly and assembly cycle is long. By adopting the above technical solution, including multiple sets of perforated base plates, the chimney is opened in the hull, the perforated base plates are inserted into the openings in the chimney and welded and fixed, and the round steel lifting device surrounds the outside of the chimney and passes through the inner hole of the lifting device in sequence through the perforated base plate. When installing the fixing device, prepare a sufficient number of perforated base plates and round steel lifting tools in advance. Bend the round steel lifting tools according to the outline of the top of the ship's chimney and divide them into appropriate sections to fit the chimney. Clean the top of the ship's chimney and make openings in the chimney as required. Insert the prepared perforated base plates into the corresponding openings in the chimney in sequence, ensuring that the base plates are inserted in place and fit tightly against the inner wall of the chimney. Fix the perforated base plates to the ship's chimney by internal and external welding. Then, pass each section of the bent and divided round steel lifting tool through the inner holes of multiple sets of perforated base plates in sequence and weld them together to form a stable connection and support structure. Apply an anti-rust paint layer for rust prevention. During subsequent maintenance, after the maintenance personnel enter the basket, they operate the lifting equipment to make the basket slide slowly along the round steel spreader. Because the round steel spreader supports the sliding operation of the basket and the perforated seat plate is evenly distributed along the circumference of the ship's chimney, the maintenance personnel can easily move the basket to various positions on the chimney to carry out maintenance operations. There is no need to frequently change the hook between the lifting lugs in different fixed positions, which improves work efficiency, reduces the difficulty of operation, and eliminates the safety hazards caused by changing the hook. By incorporating perforated base plates, openings in the chimney hull, and round steel spreaders, the round steel spreaders support sliding operations of the lifting basket, eliminating the cumbersome replacement of different fixed hooks required in traditional methods and improving maintenance efficiency. The perforated base plates are welded both internally and externally, effectively enhancing corrosion resistance. The perforated base plates have evenly distributed openings along the circumference of the chimney, reducing the risk of falls. Even if corrosion cracks at the external welds, the insertion welding method can prevent the spreaders from falling, providing reliable safety for maintenance personnel. At the same time, the application of this device reduces the cost of scaffolding and lowers maintenance expenses. Furthermore, the device's simple design coordinates with the overall style of the chimney and does not affect the ship's appearance.
[0007] Optionally, the openings in the chimney hull are evenly distributed along the top of the chimney, and the opening size of the chimney hull opening is slightly larger than the end size of the perforated base plate.
[0008] By adopting the above technical solution, the openings in the chimney hull are evenly distributed along the top of the chimney, and the opening size is slightly larger than the end size of the perforated base plate. By setting the position and size of the openings in the chimney hull, the evenly distributed openings can ensure that the perforated base plate is subjected to balanced force at the top of the chimney, effectively avoiding structural damage caused by localized force concentration, and enhancing the stability of the device. At the same time, the opening size is slightly larger than the end size of the perforated base plate, which facilitates the smooth insertion of the perforated base plate and provides a certain margin for the perforated base plate to accommodate the slight deformation of the chimney under different working conditions.
[0009] Optionally, the spacing between adjacent chimney hull openings is no more than 2m.
[0010] By adopting the above technical solution, the spacing between adjacent chimney hull openings is no more than 2m. By setting the spacing between the chimney hull openings, the spacing can be reduced as much as possible while ensuring the overall strength of the device. This not only optimizes the structural design of the device, but also effectively saves steel usage, reduces manufacturing costs, and ensures the safety of personnel operation and the stability of the hoisted load.
[0011] Optionally, the perforated base plate is made of Q235A steel, the thickness of the perforated base plate is not less than 16mm, the inner hole of the lifting device on the perforated base plate is set as a circular hole, and the diameter of the inner hole of the lifting device is not less than 28mm.
[0012] By adopting the above technical solution, the perforated base plate is made of Q235A steel with a thickness of not less than 16mm. The inner hole of the lifting device on the perforated base plate is set as a circular hole with a diameter of not less than 28mm. Through the setting of the material, thickness and inner hole size of the perforated base plate, Q235A steel has good comprehensive mechanical properties, which can meet the complex stress requirements of the chimney operation environment. At the same time, the thickness of the perforated base plate is set to not less than 16mm, which can effectively enhance the bending and deformation resistance of the perforated base plate and ensure the safety of the device. In addition, the inner hole of the lifting device on the perforated base plate ensures that the round steel lifting device can be smoothly inserted and securely connected.
[0013] Optionally, the round steel lifting device is formed by bending Q235A round steel with an outer diameter of 25mm according to the top contour of the ship's chimney, and is divided into 2, 3 or more sections to adapt to the chimney size.
[0014] By adopting the above technical solution, the round steel lifting device is made of Q235A round steel with an outer diameter of 25mm, bent into shape according to the outline of the top of the ship's chimney, and divided into 2, 3 or more sections to fit the chimney size; by setting the shape of the round steel lifting device, it can be flexibly divided into multiple sections to precisely fit the chimney.
[0015] Optionally, the round steel lifting device sequentially penetrates the inner holes of all the perforated base plates to form a connecting support structure.
[0016] By adopting the above technical solution, the round steel lifting device sequentially penetrates the inner hole of all the perforated base plates and forms a connecting support structure; through the setting of the round steel lifting device, the round steel lifting device penetrates each perforated base plate to form an overall mechanical frame, effectively dispersing the stress from different directions and enhancing the deformation resistance of the entire device.
[0017] Optionally, the perforated base plate is fixed to the opening in the chimney hull by welding.
[0018] By adopting the above technical solution, the perforated base plate is fixed to the opening in the hull of the chimney by welding. With the installation method of the perforated base plate, the perforated base plate part in the insert welding structure is welded into the hull opening. Even if the external weld seam is unfortunately corroded and cracked, the welded part inside the hull can still maintain the integrity of the structure, provide reliable support for the round steel lifting device, effectively prevent the lifting device from falling, and improve the safety of the device.
[0019] Optionally, both the perforated base plate and the round steel lifting device are coated with an anti-rust paint layer, and the anti-rust paint layer is made of the same material as the anti-rust paint layer on the surface of the ship's chimney.
[0020] By adopting the above technical solution, both the perforated base plate and the round steel spreader are coated with an anti-rust paint layer. The anti-rust paint layer can provide long-lasting anti-rust protection for the perforated base plate and the round steel spreader in complex marine environments, effectively blocking the intrusion of corrosive media and extending the service life of the perforated base plate and the round steel spreader. At the same time, the consistent anti-rust paint layer can also make the appearance of the device coordinated and unified, and improve the overall aesthetics of the device.
[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By using perforated base plates, openings in the chimney hull, and round steel spreaders, the round steel spreaders support the sliding operation of the basket, eliminating the cumbersome replacement operation between different fixed hooks in the traditional method, thus improving maintenance efficiency. The perforated base plates are welded both internally and externally, effectively enhancing corrosion resistance. The perforated base plates have evenly distributed openings along the circumference of the chimney hull, reducing the risk of falling. Even if corrosion cracks at the external welds, the insertion welding method can prevent the spreaders from falling, providing reliable safety for maintenance personnel. At the same time, the application of this device reduces the cost of scaffolding and lowers maintenance costs. Moreover, the device has a simple design that coordinates with the overall style of the chimney and does not affect the appearance of the ship. 2. By setting the position and size of the openings in the chimney hull, the evenly distributed openings can ensure that the perforated base plate is subjected to balanced force at the top of the chimney, effectively avoiding structural damage caused by localized force concentration and enhancing the stability of the device. At the same time, the opening size is slightly larger than the end size of the perforated base plate, which facilitates the smooth insertion of the perforated base plate and provides a certain margin for the perforated base plate to adapt to the slight deformation of the chimney under different working conditions. 3. By applying an anti-rust paint layer, the perforated base plate and round steel spreader can be provided with long-lasting anti-rust protection in complex marine environments, effectively blocking the intrusion of corrosive media and extending the service life of the perforated base plate and round steel spreader. At the same time, the consistent anti-rust paint layer can also make the appearance of the equipment coordinated and unified, and improve the overall aesthetics of the equipment. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of a fixing device for the later maintenance and hoisting of a ship's chimney, as described in an embodiment of this application.
[0023] Figure 2 This is a top view of a fixing device for the later maintenance of a ship's chimney, as described in an embodiment of this application.
[0024] Figure 3 This is a structural schematic diagram illustrating the installation relationship between the perforated base plate and the ship's chimney in the embodiments of this application.
[0025] Explanation of reference numerals in the attached drawings: 1. Ship's funnel; 2. Perforated base plate; 3. Round steel lifting tool; 4. Funnel hull opening. Detailed Implementation
[0026] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0027] This application discloses a fixing device for hoisting and fixing a ship's funnel during later maintenance. (Refer to...) Figure 1 The fixing device for the later maintenance and hoisting of the ship's chimney includes a perforated base plate 2. In this embodiment, the perforated base plate 2 is installed on the ship's chimney 1. There are multiple sets of perforated base plates 2, and the multiple sets of perforated base plates 2 are arranged at equal intervals along the circumferential direction of the ship's chimney 1.
[0028] Reference Figure 1 The top of the ship's chimney 1 has several chimney hull openings 4 that are equidistantly spaced along the circumference. The number of chimney hull openings 4 is the same as the number of perforated base plates 2. The perforated base plates 2 are inserted into the corresponding chimney hull openings 4 and extend into the interior of the ship's chimney 1. The perforated base plates 2 are welded to the ship's chimney 1 and the welding is done by internal and external welding.
[0029] Reference Figure 1 and Figure 3 The openings 4 in the hull of the chimney are evenly distributed along the top of the chimney 1 in the hull, and the distance between adjacent openings 4 in the hull of the chimney is no more than 2m. The distance between the openings 4 in the hull of the chimney is minimized as much as possible while ensuring the overall strength of the device. This not only optimizes the structural design of the device, but also effectively saves the amount of steel used, reduces manufacturing costs, and ensures the safety of personnel operation and the stability of the hoisted objects.
[0030] Reference Figure 1The opening size of the chimney hull opening 4 is slightly larger than the end size of the perforated base plate 2. The perforated base plate 2 is fixed to the chimney hull opening 4 by welding. The evenly distributed openings can ensure that the perforated base plate 2 is subjected to balanced force at the top of the chimney, effectively avoiding structural damage caused by local force concentration and enhancing the stability of the device. At the same time, the opening size is slightly larger than the end size of the perforated base plate 2, which facilitates the smooth insertion of the perforated base plate 2 and provides a certain margin for the perforated base plate 2 to adapt to the slight deformation of the chimney under different working conditions.
[0031] Reference Figure 1 The perforated base plate 2 is made of Q235A steel, and the thickness of the perforated base plate 2 is not less than 16mm. Q235A steel has good comprehensive mechanical properties and can meet the complex stress requirements in the chimney operating environment. At the same time, the thickness of the perforated base plate 2 is set to not less than 16mm, which can effectively enhance the bending and deformation resistance of the perforated base plate 2 and ensure the safety of the device.
[0032] Reference Figure 1 and Figure 2 The ship's chimney 1 is surrounded by a round steel lifting device 3. Multiple sets of perforated base plates 2 are provided with lifting device inner holes. The round steel lifting device 3 passes through the lifting device inner holes of the multiple sets of perforated base plates 2 in sequence and forms a connecting support structure. The diameter of the round steel lifting device 3 is smaller than the diameter of the lifting device inner hole of the perforated base plate 2. In this embodiment, the lifting device inner hole on the perforated base plate 2 is set as a circular hole, and the diameter of the lifting device inner hole is not less than 28mm.
[0033] Reference Figure 1 The round steel lifting device 3 is made of Q235A round steel with an outer diameter of 25mm, bent into shape according to the top outline of the ship's chimney 1, and divided into 2, 3 or more sections to fit the chimney size.
[0034] Reference Figure 1 Both the perforated base plate 2 and the round steel spreader 3 are coated with an anti-rust paint layer, which is made of the same material as the anti-rust paint layer on the surface of the ship's chimney 1. The anti-rust paint layer can provide long-lasting anti-rust protection for the perforated base plate 2 and the round steel spreader 3 in complex marine environments, effectively blocking the intrusion of corrosive media and extending the service life of the perforated base plate 2 and the round steel spreader 3. At the same time, the consistent anti-rust paint layer can also make the appearance of the device coordinated and unified, and improve the overall aesthetics of the device.
[0035] The implementation principle of a fixed device for hoisting and maintenance of a ship's chimney according to an embodiment of this application is as follows: When installing the fixed device, a sufficient number of perforated base plates 2 and round steel lifting tools 3 are prepared in advance. The round steel lifting tools 3 are bent into shape according to the top outline of the ship's chimney 1 and divided into appropriate sections to fit the chimney. The top of the ship's chimney 1 is cleaned. According to the requirements, the opening operation is carried out in the ship's chimney 1. The prepared perforated base plates 2 are inserted into the corresponding openings 4 of the chimney in sequence to ensure that the base plates are inserted in place and fit tightly against the inner wall of the chimney. The perforated base plates 2 are fixedly connected to the ship's chimney 1 by internal and external welding. Then, the bent and divided sections of the round steel lifting tools 3 are passed through the inner holes of multiple sets of perforated base plates 2 in sequence and welded together to form a stable connection support structure. The structure is then coated with an anti-rust paint layer for anti-rust treatment. During subsequent maintenance, after the maintenance personnel enter the basket, they operate the lifting equipment to make the basket slide slowly along the round steel spreader 3. Because the round steel spreader 3 supports the sliding operation of the basket and the perforated seat plate 2 is evenly distributed around the hull of the chimney 1, the maintenance personnel can easily move the basket to various positions on the chimney for maintenance operations. There is no need to frequently change the hook between the lifting lugs at different fixed positions, which improves work efficiency, reduces the difficulty of operation, and eliminates the safety hazards caused by changing the hook. With the perforated base plate 2, the openings in the chimney hull, and the round steel lifting device 3, the round steel lifting device 3 supports the sliding operation of the lifting basket, eliminating the cumbersome replacement operation between different fixed hooks in the traditional method, thus improving maintenance efficiency. The perforated base plate 2 adopts an internal and external welding method, which effectively enhances the corrosion resistance. The perforated base plate 2 has evenly distributed openings along the circumference of the chimney 1 of the hull, reducing the risk of falling. Even if the external weld seam is corroded and cracked, the insertion welding method can prevent the lifting device from falling, providing reliable safety for maintenance personnel. At the same time, the application of this device reduces the cost of scaffolding and the cost of maintenance operations. Moreover, the device has a simple shape that is coordinated and unified with the overall style of the chimney, without affecting the appearance of the ship.
[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A fixing device for hoisting and fixing a ship's funnel during post-maintenance, characterized in that: The system includes perforated base plates (2) arranged on the ship's funnel (1). There are multiple sets of perforated base plates (2), which are equidistantly arranged along the circumferential direction of the ship's funnel (1). The top of the ship's funnel (1) is provided with a number of funnel hull openings (4) equidistantly along the circumferential direction. The number of funnel hull openings (4) is the same as the number of perforated base plates (2). The perforated base plates (2) are inserted into the corresponding funnel hull openings (4) and welded to the ship's funnel (1). The ship's funnel (1) is surrounded by round steel lifting devices (3). Each set of perforated base plates (2) has a lifting device inner hole. The round steel lifting devices (3) pass through the lifting device inner holes of the multiple sets of perforated base plates (2) in sequence. The diameter of the round steel lifting devices (3) is smaller than the diameter of the lifting device inner hole of the perforated base plate (2).
2. The fixing device for hoisting and fixing a ship's chimney during post-maintenance as described in claim 1, characterized in that: The chimney hull openings (4) are evenly distributed along the top of the chimney (1), and the opening size of the chimney hull openings (4) is slightly larger than the end size of the perforated base plate (2).
3. The fixing device for hoisting and fixing a ship's chimney during post-maintenance as described in claim 2, characterized in that: The distance between adjacent chimney hull openings (4) is no more than 2m.
4. The fixing device for hoisting and fixing a ship's chimney during post-maintenance as described in claim 1, characterized in that: The perforated seat plate (2) is made of Q235A steel. The thickness of the perforated seat plate (2) is not less than 16mm. The inner hole of the lifting device on the perforated seat plate (2) is set as a circular hole. The diameter of the inner hole of the lifting device is not less than 28mm.
5. A fixing device for hoisting and fixing a ship's chimney during post-maintenance as described in claim 1, characterized in that: The round steel lifting device (3) is made of Q235A round steel with an outer diameter of 25mm, bent into shape according to the top outline of the ship's chimney (1), and divided into 2, 3 or more sections to fit the chimney size.
6. The fixing device for hoisting and fixing a ship's chimney during post-maintenance as described in claim 1, characterized in that: The round steel lifting device (3) passes through the inner holes of all the perforated base plates (2) in sequence, forming a connecting support structure.
7. A fixing device for hoisting and fixing a ship's chimney during post-maintenance as described in claim 1, characterized in that: The perforated base plate (2) is fixed to the opening (4) of the chimney hull by welding.
8. A fixing device for hoisting and fixing a ship's chimney during post-maintenance as described in claim 1, characterized in that: The perforated base plate (2) and the round steel lifting tool (3) are both coated with anti-rust paint, and the anti-rust paint is made of the same material as the anti-rust paint on the surface of the ship's chimney (1).