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Vessel demagnetizing method

A technology for ships and demagnetization, applied in the directions of ships, ship weapons, attack devices, etc., can solve problems such as time-consuming and laborious, and achieve the effect of reducing labor intensity, improving emergency benefits, and restoring mobility.

Inactive Publication Date: 2014-06-04
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a ship demagnetization method, which solves the time-consuming and labor-intensive problem of the existing ship demagnetization method, and does not need to wind the demagnetization coil to meet the needs of fast demagnetization of the ship

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1, a 2-ton ship, ship width B=1.5m, midship radial circumference L=5m, vertical component of local geomagnetic field Hz=20A / m, Hp=30A / m, to achieve the overall Demagnetization, including the following steps:

[0025] (1) Steps of laying submarine cables: such as figure 1 , figure 2 , image 3 As shown, the left submarine cable 3 and the right submarine cable 2 are laid in parallel along the geomagnetic east-west direction on the seabed 7 with a water depth of h=2B=3m, and the interval between the left and right submarine cables is b=2B=3m, which will be demagnetized Ship 1 is berthed above the left and right submarine cables, the axis of the degaussed ship is parallel to the left and right submarine cables, and the axis of the degaussed ship is projected on the seabed between the left and right submarine cables;

[0026] (2) Steps of forming a loop: use the left pulse power supply 5 and the right pulse power supply 4 to supply power to the left and right sub...

Embodiment 2

[0032] Example 2, a 2000-ton ship, ship width B=10m, midship radial circumference L=50m, vertical component of local geomagnetic field Hz=30A / m, Hp=20A / m, to achieve overall demagnetization , including the following steps:

[0033] (1) Steps of laying submarine cables: such as figure 1 , figure 2 , image 3 As shown, the left submarine cable 3 and the right submarine cable 2 are laid in parallel along the geomagnetic east-west direction on the seabed 7 with a water depth of h=1B=10m, and the interval between the left and right submarine cables is b=1B=10m, which will be demagnetized Ship 1 is berthed above the left and right submarine cables, the axis of the degaussed ship is parallel to the left and right submarine cables, and the axis of the degaussed ship is projected on the seabed between the left and right submarine cables;

[0034] (2) Steps of forming a loop: use the left pulse power supply 5 and the right pulse power supply 4 to supply power to the left and right s...

Embodiment 3

[0041] Example 3, a 30,000-ton ship, ship width B=30m, midship radial circumference L=100m, vertical component of local geomagnetic field Hz=20A / m, Hp=30A / m, to achieve overall demagnetization , including the following steps:

[0042] (1) Steps of laying submarine cables: such as figure 1 , figure 2 , image 3 As shown, the left submarine cable 3 and the right submarine cable 2 are laid in parallel along the geomagnetic east-west direction on the seabed 7 with a water depth of h=0.5B=15m, and the interval between the left and right submarine cables is b=0.5B=15m. The degaussed ship 1 is parked above the left and right submarine cables, the axis of the degaussed ship is parallel to the left and right submarine cables, and the degaussed ship axis is projected on the seabed between the left and right submarine cables;

[0043] (2) Steps of forming a loop: use the left pulse power supply 5 and the right pulse power supply 4 to supply power to the left and right submarine cable...

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Abstract

A vessel demagnetizing method belongs to the field of vessel demagnetization and solves the problem of time and labor consumption of existing vessel demagnetizing methods. The vessel demagnetizing method includes steps: firstly, laying submarine cables, namely laying left and right submarine cables on the sea floor, and anchoring a demagnetized vessel above the left and right submarine cables; secondly, forming a loop, namely using the cables to connecting one pole of a left pulse power source and one pole of a right pulse power source with the stern of the demagnetized vessel, and connecting the other pole of the left pulse power source and the other pole of the right pulse power source with the stem of the demagnetized vessel through the left and right submarine cables; and thirdly, electrifying for demagnetizing, namely using the left pulse power source and the right pulse power source to supply pulse current of superimposed direct-current component to the left and right submarine cables. Winding of the cables is not needed, a vessel body is directly electrified for demagnetizing, labor intensity is relieved, demagnetizing time is shortened, and expenditure is saved. Further, the vessel demagnetizing method is effective in demagnetization and low in energy consumption, the demagnetized vessel is easy in maneuvering, and the vessel demagnetizing method is especially suitable for demagnetization of a great quantity of vessels in emergency, and has fine emergency benefit and economic value.

Description

technical field [0001] The invention belongs to the technical field of ship demagnetization, and in particular relates to a ship demagnetization method, which directly energizes the ship hull without winding coils to eliminate the fixed magnetism of the ship hull. Background technique [0002] At present, the requirements for demagnetization of ships are getting higher and higher. Demagnetization ships (stations) widely use temporary coils to demagnetize ships. During demagnetization, a large number of demagnetization cables must be bundled outside the demagnetized ship to form demagnetization coils, which is particularly time-consuming and labor-intensive. Even demagnetization of small tonnage ships takes 3 to 5 days for each ship, and because the ships are bound by cables during demagnetization, it is difficult to maneuver in emergency situations, which is very dangerous. In peacetime, this contradiction is not obvious, but in the event of an emergency or an emergency, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63G9/06
Inventor 郭成豹刘大明肖昌汉洪泽宏唐申生刘胜道赵文春高俊吉
Owner NAVAL UNIV OF ENG PLA
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