Method for installing sacrificial anode in seawater pipe of ship

Abstract

The invention provides a method for installing a sacrificial anode in a ship seawater pipe, which comprises the following steps of: 1) selecting a section of detachable seawater pipe, detaching the seawater pipe, and adding copper gaskets at flanges at two ends of the seawater pipe; wherein the copper gasket is provided with a circular ring, and a boss is arranged on the inner side of the circular ring; a plurality of first through holes are formed in the circular ring of the copper gasket, and a second through hole is formed in the boss; (2) a sacrificial anode is installed in the seawater pipe through a flat iron seat frame, and the seawater pipe provided with the sacrificial anode is obtained; and (3) the seawater pipe provided with the sacrificial anode and obtained in the step (2) is reinstalled in the seawater cooling system. By the adoption of the method, the anti-corrosion capacity of the seawater pipe can be improved, after the sacrificial anode is corroded, only the sacrificial anode standard part in the seawater pipe needs to be replaced, the sacrificial anode can be replaced without entering a dock, and cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of ship engineering, and in particular relates to a method for installing a sacrificial anode in a seawater pipe of a ship. Background Art

[0002] At present, sacrificial anodes are installed in seawater doors in ship seawater systems. Sacrificial anodes are used to prevent the hull structure and outer plate where the seawater door is located from being corroded by seawater, and can play a good anti-corrosion role. However, sacrificial anodes are often installed on hull structures such as seawater doors and seawater tanks. The sacrificial anodes can only be replaced when the ship is docked for maintenance.

[0003] At present, sacrificial anodes are also installed in the seawater pipes of some passenger ships. Seawater pipes are generally copper-nickel pipes. After the pipes are corroded, they can only be replaced as a whole, which is very expensive and requires a lot of manpower to replace the entire seawater pipe. In addition, if the corrosion of the pipes is not handled in time, seawater will leak into the engine room, causing the equipment in the engine room to be corroded and contaminated by seawater. Summary of the invention

[0004] The invention provides a method for installing sacrificial anodes in seawater pipes of ships. The sacrificial anodes are installed in the seawater pipelines to increase the anti-corrosion performance of the seawater pipes in the engine room of the ship.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions.

[0006] A method for installing a sacrificial anode in a seawater pipe of a ship comprises the following steps:

[0007] 1) Select a section of detachable seawater pipe, disassemble the seawater pipe, and add copper gaskets to the flanges at both ends of the seawater pipe; wherein the copper gasket includes a circular ring and a boss arranged on the inner side of the circular ring; the circular ring of the copper gasket is provided with a plurality of first through holes, and the boss is provided with a second through hole;

[0008] 2) installing the sacrificial anode in the seawater pipe using a flat iron frame to obtain a seawater pipe with the sacrificial anode installed;

[0009] 3) The seawater pipe equipped with the sacrificial anode obtained in step 2) is reinstalled in the seawater cooling system.

[0010] In the present invention, the circular ring and boss structure in the copper gasket form a bayonet structure, which is used to fix the seawater pipe and the flat iron frame together through the copper gasket.

[0011] As an optional implementation, the boss and the ring are integrally formed.

[0012] As an optional implementation, the length of the boss is smaller than the inner diameter of the ring.

[0013] As an optional implementation, the centers of the multiple first through holes are located on the circumference of the concentric circles of the circular ring, and the multiple first through holes are evenly distributed on the circular ring.

[0014] In the present invention, the plurality of first through holes are used to fixedly connect the copper gasket to the seawater pipe through the first through holes.

[0015] As an optional implementation, the radius of the second through hole is smaller than the radius of the first through hole.

[0016] As an optional implementation, the center of the second through hole, the center of the first through hole of the circular ring that is closest to the second through hole, and the center of the circular ring are on the same straight line.

[0017] In the present invention, the technical feature that the center of the second through hole, the center of the first through hole of the circular ring closest to the second through hole and the center of the circular ring are on the same straight line can ensure that the fixation of the seawater pipe, the copper gasket and the flat iron frame is more coordinated and stable.

[0018] As an optional embodiment, the flat iron frame has an L-shaped structure, and a second through hole is opened at the short end of the flat iron frame for fixedly connecting the flat iron frame and the copper gasket through the second through hole of the flat iron frame and the second through hole on the boss of the copper gasket.

[0019] As an optional implementation manner, a third through hole is opened at the long end of the flat iron frame, which is used to fix the flat iron frame and the sacrificial anode through the third through hole.

[0020] As an optional implementation, the sacrificial anode is fixed on an iron foot, and third through holes are formed at both ends of the iron foot.

[0021] As an optional implementation, the copper gasket is fixedly connected to the flat iron frame by using bolts and nuts.

[0022] As an optional implementation, bolts and nuts are used to fix the flat iron bracket to the sacrificial anode.

[0023] As an optional implementation, the material of the copper gasket includes red copper.

[0024] As an optional implementation, the sacrificial anode adopts a standard part of a conventional sacrificial anode in the art, for example, a standard part of an aluminum-zinc-indium alloy sacrificial anode is selected according to the national standard GB / T 4948-2002.

[0025] As an optional implementation, the seawater pipe comprises a seawater pipe in a seawater cooling system pipeline.

[0026] As an optional implementation, an observation port is provided at the location where the sacrificial anode is installed, so as to understand the actual situation of the sacrificial anode in the seawater pipe in real time.

[0027] In the present invention, the above technical features can be freely combined to form a new technical solution without conflicting with each other.

[0028] The beneficial effects brought by the present invention are as follows:

[0029] (1) The method for installing sacrificial anodes in a seawater pipe of a ship provided by the present invention adopts the method of installing sacrificial anodes in a detachable seawater pipe. Since the material of the sacrificial anodes is different from that of the seawater pipe, there is a potential difference between the two. The seawater first corrodes the sacrificial anodes in the pipe, which greatly improves the anti-corrosion ability of the seawater pipe.

[0030] (2) The method for installing sacrificial anodes in a seawater pipe of a ship provided by the present invention adopts conventional sacrificial anodes in the art, and the sacrificial anodes can be easily replaced by simply removing the seawater pipe on which the sacrificial anodes are installed;

[0031] (3) In the present invention, when the sacrificial anode is corroded, only the sacrificial anode standard parts in the seawater pipe need to be replaced, which is much more convenient than replacing the seawater pipe made of copper-nickel tube in the prior art, and the price is also cheaper and the cost is lower;

[0032] (4) By adopting the method of the present invention, the sacrificial anode can be replaced without entering the dock;

[0033] (5) According to the method of the present invention, an observation port is provided at the location where the sacrificial anode is installed, so that the timing of replacing the sacrificial anode with a new one can be intuitively selected according to the actual situation of the sacrificial anode. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram showing the structure of a seawater pipe according to the present invention;

[0035] Figure 2 A schematic diagram showing the structure of a copper gasket in Example 1 of the present invention;

[0036] Figure 3 A schematic diagram showing the structure of a sacrificial anode installed in a seawater pipe according to the present invention;

[0037] Figure 4 A schematic diagram showing the front view of a sacrificial anode in the present invention;

[0038] Figure 5 A schematic diagram showing the side structure of a sacrificial anode in the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] A method for installing a sacrificial anode in a seawater pipe of a ship comprises the following steps:

[0042] 1) Select a detachable seawater pipe in the seawater cooling system and remove it. Figure 1 As shown in FIG. 1 , copper gaskets made of red copper are fixed to the flanges at both ends of the seawater pipe, such as Figure 2 As shown, the copper gasket has a thickness of 3 mm, an inner diameter of 324 mm, and an outer diameter of 395 mm;

[0043] like Figure 1 As shown, the copper gasket includes a ring and a boss arranged on the inner side of the ring, the outer diameter of the ring is 440mm, and the inner diameter is 324mm; the length of the boss is smaller than the inner diameter of the ring, and the width of the boss from the boss to the outer diameter of the ring is 98mm and 40mm; the boss is integrally formed with the ring; the ring is provided with a plurality of first through holes, the centers of the plurality of first through holes are located on the circumference of the concentric circles of the ring, the diameter of the concentric circles is 395mm, the plurality of first through holes are evenly distributed on the ring, and the diameter of the first through holes is 22mm; the boss is provided with a second through hole, the aperture of the second through hole is smaller than the aperture of the first through hole on the ring, which is 12mm; as shown Figure 2 As shown, the end of the copper gasket without the boss is fixed to the flanges at both ends of the seawater pipe by bolts and nuts;

[0044] 2) Two flat iron frames with specifications of 35mm*3mm are used to install the sacrificial anode in the seawater pipe to obtain a seawater pipe installed with the sacrificial anode; wherein the sacrificial anode is selected according to the national standard GB / T 4948-2002, the model of the sacrificial anode is A1H-5, the specification is 400*120*50 (unit is mm), and the iron foot size is 460*35 (unit is mm); the present invention installs 3 sacrificial anodes on a ship;

[0045] like Figure 3 As shown, the flat iron frame has an L-shaped structure, including a short end of the flat iron and a long end of the flat iron. The short end of the flat iron is provided with a second through hole.

[0046] A third through hole is opened at the long end of the flat iron, and the third through hole at the short end of the flat iron frame is aligned with the through hole on the boss of the copper gasket, and the two are fixed together by bolts and nuts, such as Figure 2 As shown;

[0047] The sacrificial anode is fixed on a flat iron sheet (length 460 mm) with a third through hole (diameter of the through hole is 12 mm) at both ends. Figure 4 The third through hole of the long end of the flat iron bracket is aligned with the third through hole of the flat iron sheet fixed with the sacrificial anode, and the bolts and nuts are fixed together, such as Figure 2 As shown, a seawater pipe equipped with a sacrificial anode is obtained;

[0048] 3) The seawater pipe equipped with the sacrificial anode obtained in step 2) is reinstalled in the seawater cooling system.

[0049] Example 2

[0050] The difference between this embodiment and embodiment 1 is that an observation port is provided at the location where the sacrificial anode is installed, so as to understand the actual situation of the sacrificial anode in the seawater pipe in real time.

[0051] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for installing a sacrificial anode in a seawater pipe of a ship, characterized in that: The following steps are involved: 1) Select a section of detachable seawater pipe, disassemble the seawater pipe, and add copper gaskets to the flanges at both ends of the seawater pipe; wherein the copper gasket includes a circular ring and a boss arranged on the inner side of the circular ring; the circular ring of the copper gasket is provided with a plurality of first through holes, and the boss is provided with a second through hole; 2) installing the sacrificial anode in the seawater pipe using a flat iron frame to obtain a seawater pipe with the sacrificial anode installed; 3) The seawater pipe equipped with the sacrificial anode obtained in step 2) is reinstalled in the seawater cooling system.

2. The method for installing a sacrificial anode in a ship seawater pipe according to claim 1, characterized in that: The boss and the ring are integrally formed.

3. The method for installing a sacrificial anode in a ship seawater pipe according to claim 2, characterized in that: The centers of the plurality of first through holes are located on the circumference of the concentric circles of the circular ring, and the plurality of first through holes are evenly distributed on the circular ring.

4. The method for installing a sacrificial anode in a ship seawater pipe according to claim 1, characterized in that: A radius of the second through hole is smaller than a radius of the first through hole.

5. The method for installing a sacrificial anode in a ship seawater pipe according to any one of claims 1 to 4, characterized in that: The center of the second through hole, the center of the first through hole of the circular ring closest to the second through hole and the center of the circular ring are on the same straight line.

6. The method for installing a sacrificial anode in a ship seawater pipe according to claim 5, characterized in that: The flat iron frame has an L-shaped structure, and a second through hole is formed at a short end of the flat iron frame.

7. The method for installing a sacrificial anode in a ship seawater pipe according to claim 6, characterized in that: The long end of the flat iron frame is provided with a third through hole, or / and The sacrificial anode is fixed on the iron foot, and third through holes are formed at both ends of the iron foot.

8. The method for installing a sacrificial anode in a seawater pipe of a ship according to claim 7, characterized in that: The copper gasket is fixedly connected to the flat iron frame by bolts and nuts, or / and The flat iron support frame is fixedly connected to the sacrificial anode by bolts and nuts.

9. The method for installing a sacrificial anode in a seawater pipe of a ship according to any one of claims 1 to 4, characterized in that: The copper gasket is made of red copper; or / and The seawater pipe comprises a seawater pipe in a seawater cooling system pipeline; or / and The sacrificial anode adopts a sacrificial anode standard part.

10. The method for installing a sacrificial anode in a seawater pipe of a ship according to any one of claims 1 to 4, characterized in that: An observation port is provided at the location where the sacrificial anode is installed.

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