Device for preventing stray current from corroding ship body

Abstract

The utility model belongs to a device for preventing stray current from corroding a ship body in the technical field of ships. A protective barrier stand column (8) is arranged on the side face of a ship body deck (7) of the ship body (6) and connected with a sacrificial anode (4) through a fixing cable (5), the sacrificial anode (4) is located on the side face of the ship body (6), and the protective barrier stand column (8) is connected with the sacrificial anode (4) through a diversion cable (3) at the same time. According to the device for preventing the stray current from corroding the ship body, the structure is simple, the stray current can be effectively guided out and does not pass through the ship body, the stray current is prevented from corroding the ship body, and the ship performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ships, and more specifically relates to a device for preventing stray current from corroding a ship body. Background Art

[0002] In the existing technology, after a newly built steel ship is launched, the stray current caused by the ship's electric welding, etc., causes corrosion to the underwater hull and appendages of the hull. The main method of protection is to install an electric welder on board the ship, connect the welder ground wire to the hull, and discharge the stray current into the sea. Due to the complex operating conditions on board, the welder ground wire is easily damaged and poorly insulated, which can easily cause stray current to corrode the hull's outer plating. Stray current can corrode the hull's outer plating, posing a great threat to the safety of the ship. Preventing stray current from corroding the hull has become the key to hull protection. In summary, due to the complex operating conditions on board, the welder ground wire is easily damaged, the electrical insulation is poor, and there are stray currents in the waters where the ship is docked, which can easily cause stray current to corrode the hull's outer plating.

[0003] The prior art includes a technology entitled "Method and Device for Automatic Detection and Drainage of Stray Current for Ship Seawater Pipelines" with a publication (announcement) number of "CN108169547A." This technology provides a method for automatically detecting and draining stray current for ship seawater pipelines, belonging to the field of stray current detection technology. This method directly utilizes the metal flanges on both sides of an electrical insulator in a seawater pipeline as stray current measurement input terminals. By continuously detecting the voltage between the metal flanges on both sides of the electrical insulator, the intensity and direction of the stray current are determined in real time. Simultaneously, the metal flanges on both sides of the electrical insulator serve as stray current drain terminals, and the hull serves as a stray current return terminal. When the measured stray current in the seawater pipeline exceeds a threshold range, the stray current drain terminal of the metal flange on the current outflow side is controlled to short-circuit the stray current return terminal of the hull based on the direction of the stray current flow. This allows the stray current in the seawater pipeline to flow directly back to the hull for drainage, eliminating the corrosive effects of stray current on the seawater pipeline. The present invention also provides a stray current automatic detection and drainage device, which can also eliminate the influence of stray current corrosion.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies of the existing technology, a device for preventing stray current from corroding the hull is provided, which has a simple structure and can effectively conduct stray current without passing through the hull, thereby preventing stray current from corroding the hull and improving the performance of the ship.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0007] The utility model is a device for preventing stray current from corroding the hull. A protective railing column is arranged on the side of the hull deck of the hull. The protective railing column is connected to a sacrificial anode through a fixing cable. The sacrificial anode is located on the side of the hull and is also connected to the sacrificial anode through a guide cable.

[0008] One end of the guide cable is connected to the guardrail post through a bolt and a wiring copper nose; one end of the guide cable is connected to the sacrificial anode through a bolt and a wiring copper nose.

[0009] The sacrificial anode is configured to be immersed in seawater.

[0010] A guardrail column is provided on each side of the hull deck, and the guardrail column on each side is connected to a corresponding sacrificial anode via a fixing cable, and each sacrificial anode is located on a corresponding side of the hull.

[0011] A plurality of guardrail columns and a plurality of sacrificial anodes are respectively arranged at intervals on each side of the hull.

[0012] The fixing rope is made of galvanized iron wire or stainless steel wire.

[0013] The guide cable is a copper core armored cable.

[0014] The sacrificial anode is an aluminum-zinc-indium alloy.

[0015] The bolts are stainless steel bolts or galvanized bolts.

[0016] The technical solution of this utility model is adopted, and the working principle and beneficial effects are as follows:

[0017] The device for preventing stray current from corroding the hull of a ship described in the present invention comprises a sacrificial anode disposed on the side of the hull, the sacrificial anode being immersed in seawater, and a guardrail post on the hull deck being connected to the sacrificial anode via a fixing cable. The sacrificial anode is located on the side of the hull, and the guardrail post is also connected to the sacrificial anode via a guide cable. In this way, the sacrificial anode is reliably connected and fixed, preventing the sacrificial anode from moving around freely in the seawater, and the guardrail post is connected to the sacrificial anode via the guide cable. When stray current caused by electric welding on a ship flows into the hull, the stray current is transmitted to the guardrail post and can then be effectively and quickly introduced into the sacrificial anode in the seawater below the water surface via the guide cable. At this time, the stray current can corrode the anode but not the hull, thereby effectively preventing stray current from corroding the hull and strengthening the protection of the hull. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1This is a schematic structural diagram of the device for preventing stray current from corroding the hull according to the present invention;

[0020] Figure 2 This is a schematic structural diagram of the device for preventing stray current from corroding the hull according to the present invention;

[0021] The marks in the accompanying drawings are: 1. bolt; 2. wiring copper nose; 3. guide cable; 4. sacrificial anode; 5. fixing rope; 6. hull; 7. hull deck; 8. guardrail column; 9. water surface. DETAILED DESCRIPTION

[0022] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connections of the various components involved, the functions and working principles of the various components, etc., by referring to the accompanying drawings.

[0023] As attached Figure 1 -Attached Figure 2 As shown, the utility model is a device for preventing stray current from corroding the hull. A guardrail column 8 is set on the side of the hull deck 7 of the hull 6. The guardrail column 8 is connected to the sacrificial anode 4 through a fixing cable 5. The sacrificial anode 4 is located on the side of the hull 6. The guardrail column 8 is also connected to the sacrificial anode 4 through a guide cable 3. The above structure proposes an improved technical solution to the shortcomings of the existing technology. When the structure is set up, a sacrificial anode is set on the side of the hull. The sacrificial anode is immersed in seawater, and the guardrail column 8 on the hull deck 7 is connected to the sacrificial anode 4 through a fixing cable 5. The sacrificial anode 4 is located on the side of the hull 6. The guardrail column 8 is also connected to the sacrificial anode 4 through a guide cable 3. In this way, the sacrificial anode 4 is reliably connected and fixed to prevent it from moving around in the seawater, and the guardrail column 8 is connected to the sacrificial anode 4 through the guide cable 3. When stray current, such as from welding on a ship, flows into the hull 6, it is transferred to the guardrail posts 8 and then effectively and rapidly directed through the guide cables 3 to the sacrificial anodes 4 in the seawater below the water surface 9. The stray current then corrodes the anodes but not the hull 6, effectively preventing corrosion from the stray current and enhancing hull protection. The device for preventing stray current corrosion of the hull of the present utility model has a simple structure and can effectively conduct stray current away from the hull, preventing corrosion from the hull and improving vessel performance.

[0024] One end of the guide cable 3 is connected to the guardrail post 8 via a bolt 1 and a copper lug 2; another end of the guide cable 3 is connected to the sacrificial anode 4 via a bolt 1 and a copper lug 2. This structure conveniently and reliably connects the guide cable 3 to the guardrail post 8 and the sacrificial anode 4, reliably conducting away stray currents.

[0025] The sacrificial anode 4 is configured to be submersible in seawater. With this structure, when stray current flows into the hull, the copper-core current-conducting cable directs the stray current into the sacrificial anode 4, made of an aluminum-zinc-indium alloy material with a lower potential in the seawater, protecting the hull 6.

[0026] A guardrail post 8 is provided on each side of the hull deck 7 of the hull 6. Each guardrail post 8 is connected to a corresponding sacrificial anode 4 via a fixing cable 5. Each sacrificial anode 4 is located on a corresponding side of the hull 6. Multiple guardrail posts 8 and sacrificial anodes 4 are spaced apart on each side of the hull 6. This structure allows sacrificial anodes to be installed on different sides of the hull. The guardrail posts 8 at different locations on the hull are connected to current diversion cables, effectively diverting stray currents from different locations.

[0027] The fixing cable 5 is made of galvanized iron wire or stainless steel wire. The current guide cable 3 is a copper-core armored cable. The sacrificial anode 4 is made of an aluminum-zinc-indium alloy. The bolt 1 is a stainless steel bolt or a galvanized bolt. The above structure, the fixing cable 5, the sacrificial anode 4, and the bolt 1 are all made of selected materials, which can effectively improve product quality and performance, and extend service life.

[0028] The device for preventing stray current from corroding the hull of a ship described in the present invention has a structure in which a sacrificial anode is provided on the side of the hull. The sacrificial anode is immersed in seawater, and the guardrail column 8 on the hull deck 7 is connected to the sacrificial anode 4 via a fixing cable 5. The sacrificial anode 4 is located on the side of the hull 6. The guardrail column 8 is also connected to the sacrificial anode 4 via a guide cable 3. In this way, the sacrificial anode 4 is reliably connected and fixed, preventing the sacrificial anode 4 from moving around freely in the seawater, and the guardrail column 8 is connected to the sacrificial anode 4 via the guide cable 3. When stray current caused by electric welding of the ship flows into the hull 6, the stray current is transmitted to the guardrail column 8 and then can be effectively and quickly introduced into the sacrificial anode 4 in the seawater below the water surface 9 through the guide cable 3. At this time, the stray current can corrode the anode but not the hull 6, thereby effectively preventing stray current from corroding the hull and strengthening the protection of the hull.

[0029] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A device for preventing stray current from corroding a ship's hull, characterized by: A guardrail column (8) is provided on the side of the hull deck (7) of the hull (6), and the guardrail column (8) is connected to the sacrificial anode (4) through a fixing cable (5). The sacrificial anode (4) is located on the side of the hull (6), and the guardrail column (8) is also connected to the sacrificial anode (4) through a guide cable (3).

2. The device for preventing stray current from corroding a ship hull according to claim 1, characterized in that: One end of the guide cable (3) is connected to the guardrail post (8) through a bolt (1) and a wiring copper nose (2); one end of the guide cable (3) is connected to the sacrificial anode (4) through a bolt (1) and a wiring copper nose (2).

3. The device for preventing stray current from corroding a ship hull according to claim 1 or 2, characterized in that: The sacrificial anode (4) is configured as a structure capable of being immersed in seawater.

4. The device for preventing stray current from corroding a ship hull according to claim 1 or 2, characterized in that: A guardrail column (8) is provided on each side of the hull deck (7) of the hull (6), and the guardrail column (8) on each side is connected to a corresponding sacrificial anode (4) via a fixing cable (5), and each sacrificial anode (4) is located on a corresponding side of the hull (6).

5. The device for preventing stray current from corroding a ship hull according to claim 4, characterized in that: A plurality of guardrail columns (8) and a plurality of sacrificial anodes (4) are respectively arranged at intervals on each side of the hull (6).

6. The device for preventing stray current from corroding a ship hull according to claim 1 or 2, characterized in that: The fixing rope (5) is made of galvanized iron wire or stainless steel wire.

7. The device for preventing stray current from corroding a ship hull according to claim 1 or 2, characterized in that: The guide cable (3) is a copper core armored cable.

8. The device for preventing stray current from corroding a ship hull according to claim 1 or 2, characterized in that: The sacrificial anode (4) is an aluminum-zinc-indium alloy.

9. The device for preventing stray current from corroding a ship hull according to claim 2, characterized in that: The bolts (1) are stainless steel bolts or galvanized bolts.

Images