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CN-122009424-A - Auxiliary anode positioning tool and positioning method for ship body impressed current cathode protection device

CN122009424ACN 122009424 ACN122009424 ACN 122009424ACN-122009424-A

Abstract

The invention relates to an auxiliary anode positioning tool of a ship body externally-applied current cathode protection device, which comprises an auxiliary anode, welding studs and a stuffing box shell, wherein the welding studs are welded on an outer plate of the ship body after being positioned by the positioning tool, the auxiliary anode positioning tool comprises a template, an adjustable connecting structure, a positioning shaft, a first fastening device and a second fastening device, a plurality of first through holes and a plurality of second through holes are formed in the template, the aperture and the position of the first through holes are consistent with those of fixing holes in the auxiliary anode, the position of the second through holes are consistent with those of fixing holes in the auxiliary anode, the positions of the second through holes are consistent with those of fixing shafts in the middle of the auxiliary anode, the adjustable connecting structure respectively penetrates through the first through holes in the template to be in one-to-one corresponding movable connection with the welding studs, and the positioning shaft penetrates through the second through holes to be in movable connection with the stuffing box shell. According to the invention, the welding stud is accurately positioned to the ship body through the cooperation of template physical profiling and mechanical adjustment, so that the auxiliary anode is accurately installed.

Inventors

  • JIANG XIAOTING
  • YAN LE
  • YAO AIPING

Assignees

  • 沪东中华造船(集团)有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (10)

  1. 1. The auxiliary anode positioning tool of the ship body externally-applied current cathode protection device comprises an auxiliary anode, welding studs (5) and a stuffing box shell (11), and is characterized in that a plurality of the welding studs (5) are welded on a ship body outer plate (12) after being positioned by the auxiliary anode positioning tool, the auxiliary anode positioning tool comprises a template (8), a plurality of adjustable connecting structures, a positioning shaft (7), a first fastening device and a second fastening device, wherein the template (8) is provided with a plurality of first through holes (14), the number of the first through holes (14) is the same as that of the fixing holes on the auxiliary anode, the aperture and the position of the plurality of first through holes (14) are consistent with those of the plurality of fixing holes on the auxiliary anode, a second through hole (15) is also arranged in the middle of the template (8), the position of the second through hole (15) is consistent with that of the fixing shaft in the middle of the auxiliary anode, and the thickness of the template (8) is larger than or equal to that of the auxiliary anode; The quantity of the adjustable connecting structures is the same as that of the first through holes (14), the adjustable connecting structures comprise a third fastening device, the adjustable connecting structures respectively penetrate through the corresponding first through holes (14) on the sample plate (8) and are in one-to-one movable connection with the welding studs (5), the adjustable connecting structures control the longitudinal movement of the welding studs (5), the positioning shaft (7) penetrates through the second through holes (15) to be in movable connection with the stuffing box shell (11), the first fastening device is used for locking and fixing the positioning shaft (7) and the sample plate (8), the second fastening device is used for locking and fixing the positioning shaft (7) and the stuffing box shell (11), and the third fastening device is used for locking and fixing the adjustable connecting structures and the sample plate (8).
  2. 2. The ship body impressed current cathodic protection device auxiliary anode positioning tool according to claim 1, wherein the third fastening device is a lock nut (2), the adjustable connecting structure comprises a bolt (1), a lock nut (2) and a connecting sleeve (4), the bolt (1) penetrates through a first through hole (14) of a template (8), the lock nut (2) is further arranged between a bolt head of the bolt (1) and the template (8), one end of the connecting sleeve (4) is movably connected to the tail of the bolt (1), the other end of the connecting sleeve (4) is movably connected with the welding stud (5), the bolt (1) is movably connected with the welding stud (5) through the connecting sleeve (4), the lock nut (2) locks and fixes the bolt (1), the connecting sleeve (4) and the template (8), and the lock nut (2) limits longitudinal movement of the welding stud (5).
  3. 3. The auxiliary anode positioning tool for the impressed current cathodic protection device of the ship body according to claim 2, wherein the adjustable connecting structure further comprises a first gasket (3), and the first gasket (3) is arranged between the connecting sleeve (4) and the template (8) so as to enable the connecting sleeve (4) to be in smooth contact with the template (8).
  4. 4. The auxiliary anode positioning tool for the ship body impressed current cathodic protection device according to claim 2 or 3, wherein the screw thread specification of the lock nut (2) is consistent with the screw thread specification of the bolt (1), the screw thread specification of the bolt (1) is consistent with the screw thread specification of the welding stud (5), a through threaded hole is formed in the connecting sleeve (4), and the screw thread specification of the through threaded hole is consistent with the external screw thread specifications of the bolt (1) and the welding stud (5).
  5. 5. The hull impressed current cathodic protection device auxiliary anode positioning tooling of claim 1, wherein the first fastening device is a first nut (6), the second fastening device comprises a second nut (10) and a second gasket (9), the first nut (6) is installed on the upper screw section of the positioning shaft (7), the first nut (6) locks and fixes the positioning shaft (7) and the template (8), the second nut (10) and the second gasket (9) are installed on the lower screw section of the positioning shaft (7), the second gasket (9) is adjacent to the stuffing box housing (11), and the second nut (10) locks and fixes the positioning shaft (7) and the stuffing box housing (11) adjacent to the second gasket (9).
  6. 6. The auxiliary anode positioning tool for the ship body impressed current cathodic protection device of claim 1, wherein the diameter of the first through hole (14) of the template (8) is the outer diameter of the bolt (1) plus 0.2-0.3 mm, the diameter of the second through hole (15) is the upper screw section diameter of the positioning shaft (7) plus 0.2-0.3 mm, and the thickness of the template (8) is 10mm.
  7. 7. The auxiliary anode positioning tool for the ship body impressed current cathode protection device according to claim 1, wherein the positioning shaft (7) is composed of three sections, an upper screw section of the positioning shaft (7) is a large screw section, the middle is a cylindrical section, a lower screw section is a small screw section, and the diameter of the cylindrical section of the positioning shaft (7) is the diameter of an inner hole of a stuffing box shell (11) reduced by 0.03-0.05 mm.
  8. 8. The auxiliary anode positioning tool for the ship body impressed current cathodic protection device according to claim 3 or 5, wherein the number of the first through holes (14) of the template (8) and the number of the adjustable connecting structures are kept the same as the number of the welding studs (5), the number of the bolts (1), the locking nuts (2), the first gaskets (3), the connecting sleeves (4), the first nuts (6), the second gaskets (9), the second nuts (10), the positioning shafts (7) and the template (8) are steel, and the welding studs (5) are stainless steel.
  9. 9. An auxiliary anode positioning method of a ship body impressed current cathodic protection device, which is applied to an auxiliary anode positioning tool as claimed in any one of claims 1 to 8, and is characterized by comprising the following implementation steps: Firstly, installing a lock nut (2) on a bolt (1), screwing the lock nut to a position close to the bolt head of the bolt (1), and then penetrating the bolt (1) into a first through hole (14) of a template (8); Installing a first gasket (3) at one end of a connecting sleeve (4), screwing the tail of a bolt (1), screwing the other end of the connecting sleeve (4) into a threaded section of a welding stud (5), screwing the welding stud (5) to the innermost part, rotating a locking nut (2) downwards, and fixing the bolt (1), the connecting sleeve (4) and a sample plate (8) together; Step three, a positioning shaft (7) passes through a second through hole (15) of the template (8), the template (8) is fixed with an upper screw section of the positioning shaft (7) by using a first nut (6), the distance of the template (8) is adjusted to be a proper distance from a ship body outer plate (12), a watertight cover plate (13) in a ship is opened, a second gasket (9) is arranged on a lower screw section of the positioning shaft (7) in a close proximity to a stuffing box shell (11), and a second nut (10) is arranged on a lower screw section of the positioning shaft (7) in a close proximity to the second gasket (9); pulling the positioning shaft (7) outwards, adjusting the template (8) to be parallel to the ship length direction, and screwing the welding studs (5) outwards from the connecting sleeve (4) until the welding studs (5) are contacted with the ship body outer plate (12) and then stopping; Welding a plurality of welding studs (5) on a ship body outer plate (12) respectively by using an electric welding machine, unscrewing a lock nut (2), a bolt (1), a first nut (6) and a second nut (10), dismantling the second nut (10) and a second gasket (9), dismantling a template (8) and a positioning shaft (7), polishing a welding line, uniformly and flatly smearing an auxiliary anode mounting surface by using epoxy putty, and protecting an inner hole of a stuffing box shell (11) and the welding studs (5) when the epoxy putty is smeared; Step six, aligning an intermediate fixing shaft (20) of an auxiliary anode with a stuffing box shell (11), aligning a plurality of fixing holes of the auxiliary anode with a welding stud (5), installing the auxiliary anode, connecting and fixing the auxiliary anode with the welding stud (5) through a stainless steel nut installed on the auxiliary anode, installing a stuffing box (23) in the stuffing box shell (11) to keep tightness, connecting and fixing the fixing shaft (20) by using an auxiliary anode self-contained fastener, wherein the auxiliary anode self-contained fastener comprises a gland (17) arranged through the intermediate fixing shaft (20), a third gasket (18), a third nut (19) and a fourth nut (21), compressing the stuffing box (23) by the gland (17), placing the third gasket (18) next to the gland (17), then installing the third nut (19) next to the third gasket (18), then placing the third nut (19) next to the third nut (19) in a connector lug (22), connecting a cable with the connector lug (22) in the fourth nut (21) and tightly screwing the cable outlet, and coating the cable outlet with the epoxy putty (16) to prevent the sealing ring (13) from being watertight.
  10. 10. The method for positioning the auxiliary anode of the impressed current cathodic protection device for the ship body according to claim 9, wherein in the second step, a first gasket (3) is arranged at one end of the connecting sleeve (4) and the screwing length of the tail part of the screw bolt (1) is 1-1.2 times the diameter of the screw bolt (1), in the third step, the proper distance from the ship body outer plate (12) is that the distance from the welding stud (5) to the ship body outer plate (12) is 5mm at the minimum, and the welding stud (5), the first through hole (14) of the template (8) and the fixing hole of the auxiliary anode are 8.

Description

Auxiliary anode positioning tool and positioning method for ship body impressed current cathode protection device Technical Field The invention relates to the technical field of ship construction, in particular to an auxiliary anode positioning tool and an auxiliary anode positioning method for a ship body impressed current cathodic protection device. Background In order to slow down the corrosion of the ship running in sea water for a long time and improve the ship protection effect, and avoid the high cost caused by secondary docking, in the ship construction, means such as a sacrificial anode, a cathode protection device with external current and the like are adopted to improve the corrosion resistance of the ship outer plate besides the conventional paint coating construction at present. The prior art, such as the installation method of the impressed current cathodic protection device disclosed in the patent publication No. CN118668214A, mentions that the corrosion protection of the ship body is carried out by means of the impressed current cathodic protection device. The ship body impressed current cathodic protection device is used for preventing the corrosion of a ship body metal structure, the protection range of the method is wide, the adjustable current is suitable for different environments, the service life is long, and the surface of the ship body metal is polarized to a cathodic state through the impressed current, so that the occurrence of electrochemical corrosion is inhibited. The auxiliary anode is used as a key component in a ship body impressed current cathode protection device and is usually made of corrosion-resistant materials, is arranged on a ship body outer plate and is used for releasing protection current, and the protection current needs to be uniformly distributed to avoid insufficient protection or over protection. The installation position of the auxiliary anode needs to be accurately matched with the welding stud, otherwise poor sealing or uneven current distribution can be caused, and the anti-corrosion effect is affected. With the development and application of the technology of building in the field of ships, and the development of the technology of building high and new ships, advanced shipbuilding technology, precision shipbuilding management and the like, the requirements on the installation and positioning precision of all equipment on the ships are increased. However, for the installation of the auxiliary anode, most of the ship body outer plates are provided with linear (curved surfaces), so that the number of welding studs of the ship body outer plates is large, errors are caused by the conventional simple measurement and positioning, the device parts of the outer plates cannot be aligned with the welding studs completely, and reworking is caused by the fact that the device is not installed. Therefore, in order to optimize the installation precision, the invention provides an auxiliary anode positioning tool and an auxiliary anode positioning method for a ship body impressed current cathodic protection device. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide an auxiliary anode positioning tool and an auxiliary anode positioning method for a ship impressed current cathodic protection device, which solve the reworking problem caused by the traditional measurement error by designing a special positioning tool (such as a template similar to a ship outer plate device, an adjustable connecting structure and the like) and ensure the accurate alignment of an auxiliary anode and a welding stud, thereby improving the installation efficiency and the reliability of an anti-corrosion system. In order to achieve the above object, the present invention provides the following technical solutions: The invention firstly provides an auxiliary anode positioning tool of a ship body impressed current cathodic protection device, which comprises an auxiliary anode, welding studs and a stuffing box shell, wherein a plurality of welding studs are welded on an outer plate of the ship body after being positioned by the auxiliary anode positioning tool, the auxiliary anode positioning tool comprises a template, a plurality of adjustable connecting structures, a positioning shaft, a first fastening device and a second fastening device, a plurality of first through holes are formed in the template, the number of the first through holes is the same as that of the fixing holes in the auxiliary anode, the aperture and the position of the first through holes are consistent with those of the fixing holes in the auxiliary anode, a second through hole is formed in the middle of the template, the position of the second through hole is consistent with that of the fixing shaft in the middle of the auxiliary anode, and the thickness of the template is larger than or equal to that of the auxiliary anode; The quantity of the adjustable connecting structures is t