JPS6092997A - Replaceable sea chest anode - Google Patents

Abstract

PURPOSE:To permit the replacement of an anode in a ship by installing the upper and the lower screw seats onto an outside plate from the inside of the ship towards seawater and screwing-in an integrally-formed shaft having the anode installed between the upper and the lower screws, thus sealing-in seawater by the packing performance of the screw part. CONSTITUTION:When the cover 2 of a cover 1 is demounted and the square head 6 of an upper screw 5 is turned in the loosening direction, an anode 10 installed integrally with the upper screw 5 and a lower screw 8 shifts upward. When the upper screw 5 rises and is exposed from an upper-screw seat 4, the fitting of the lowe screw 8 is released from a lower-screw seat 7, and the lower screw 8 rises. When the upper screw 5 is released from the upper-screw seat 4, the lower screw 8 is fitted into the upper-screw seat 4, since L1>L2. The lower screw 8 is raised further, and the anode 10 is arranged at the upper part of the upper-screw seat 4. Since, in this state, the lower screw 8 is fitted into the upper-screw seat 4, seawater is sealed-in, and when the installation bolt 11a and nut 11b of the anode 10 are released, the anode 10 is divided into two parts, and the replacement of the anode in a ship is permitted.

Description

[Detailed Description of the Invention] This invention relates to a sea chest (
The present invention relates to a replaceable nouchest anode in which a corrosion-resistant anode attached to a ship such as SEA-CHEST can be replaced even while the ship is underway.

Ship's sea chest (SEA-CHEST) - A seawater suction box consisting of the outer shell of a ship where seawater intake ports are provided, and a typical ship has three to four locations. - is provided with an anode made of zinc or the like to prevent the inner and outer panels of the sea chest from being corroded by seawater. The anode (corrosion-resistant zinc) for the ship's /-chest is
Since it is fixed to the outer panel with bolts, its replacement must be done inside the dry dock.

By the way, the anode inside the sea chest wears out more than other anodes with outer panels due to the influence of the seawater pump inlet, etc., and should be replaced within a short period of time, but the interval between each ship's repair dock Normally, it lasts about two years and cannot be replaced during that time.

As mentioned above, conventional anodes cannot be replaced during a voyage, and due to the degree of wear on the anode in the sea chest, it has been desired to be able to replace the anode while the ship is at sea.

The present invention has been made so that the above-mentioned replacement work can be carried out even when the ship is sailing. An upper screw washer is attached to the hull outer plate part with the other end protruding into the ship, and has a female thread cut on the inner surface, and has the same female screw structure as the upper screw washer inside the no chest. It is attached and fixed to the hull outer plate part with the same center and has a screw seat at the bottom,
The central axis is the same, and male threads of the same diameter are cut on the top and bottom to form an integral structure, and the upper threaded part fits into the upper screw seat, and the lower threaded part fits into the lower screw seat and can rotate, rising. Accordingly, the lower threaded part fits into the upper screw seat before the upper threaded part comes out of the upper screw seat, sealing the intrusion of seawater into the ship. and an anode that can be removed while the upper screw portion passes through the upper screw seat as it rises, and the lower screw portion fits into the upper screw seat to seal seawater from entering the ship. The present invention provides a replaceable sea chest characterized by:

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall side view of the replaceable sea chest anode of the present invention, and illustrates its construction.

Reference numeral 50a indicates a portion of the hull where seawater is present, 50b indicates a hull outer plate, and 50c indicates an outer portion of the hull. The screw seat 4 into which the upper screw 5 is fitted and inserted is welded to the outer plate 501), and the lower screw seat 7 of the lower screw 8 is fixed to the outer plate 501) by the support 12 inside the chest 50a. . The upper and lower screw seats 4 and 7 are female threaded, and the upper and lower screw seats 5
．． 8 has a male thread. Raise and remove the upper screw 5, and remove the R; ) is welded and fixed. The upper screw 5 and the lower screw 8 are integrated with a shaft 9, and a cylindrical anode 10 divided into two parts is attached to the center of the shaft 9.
la, has been reprinted in Natsutollb. The thread diameter D1 of the upper screw 5 and the thread diameter I)2 of the lower screw 8 are equal.
is adapted to also fit into the upper screw seat 4. Thread diameter DI
+D2 is larger than the diameter 1 of the anode 1' Hl, so that the anode 10 can pass through the upper screw hole 4. Father screw seat 4 screw length +-. is larger than J (sizes 1 and 2) of the mounting part of the anode 1o.This means that if the upper screw 5 comes out to the upper part of the upper screw seat 4, the lower screw 8 will fit into the upper screw seat 4. )
It is the ξth.

Figure 2 is a side view of the upper screw and the lower screw. The upper screw 5 with a screw diameter D1 has a square head 6, and the lower screw 8 with a screw diameter D2 and the shaft 9 are integrated. be.

Figure 3 shows a side view (a) and a hemostasis diagram (b) of the anode.
2 is provided.

Next, the operation of the sea chest anode having the above configuration will be explained.

In Figure 4, a't 2 of cover 1 is connected to bolt nano 1.
Do not loosen and remove 3. When the square head 6 of the upper screw 15 is rotated in the loosening direction using a spanner, the anode 10, which has been Iffed together with the upper screw 5 and the lower screw 8, moves upward. As shown in Figure 8A5, the upper screw 5 is attached to the upper part 1.
When the L and L screw seats 4↓ are exposed, follow this and lower the lower screws 8.
Double the fitting from the lower screw seat 7 with VJ.

Next, as shown in FIG. 6, when the upper screw 5 is removed from the upper threaded portion 4, the king screw 8 is fitted into the upper screw portion 4 where L+>1-2. Furthermore, the lower screw 8 is screwed down and the anode 10 is placed up to the top of the upper screw portion 4. In this state, the seawater is sealed because the lower screw 8 is fitted into the lower screw part 4, and the additional bolt 11a of the anode 10 is sealed.
, if the nut 1-11b is released, the anode 10 becomes lOa,
10b is divided into two parts, making it possible to exchange them. After replacing the anode, the ITl will be restored, but this work can be done by reversing the procedure described above.

According to the above-described replacement chest anode of the present invention, the upper screw part and the lower screw part that fits therein,
- Integrate the top screw and the bottom screw that fits with the I-ring with the same diameter (14 construction). If possible, you can check the anode wear amount and replace it at any time] (not limited to inside the dry dock)
In consideration of the possibility of leakage from the threaded part, the anode seat part has a double structure with a cover covered with a blind flange/jet, and the threaded part that exits outside the ship has a double structure. In order to prevent breakage and adhesion to the sea-generating parts, a female screw is provided as a protective pressure, making it possible to replace it even while the ship is sailing.

[Brief explanation of drawings]

Fig. 1 is a side view showing the overall configuration of one embodiment of the replaceable/chest anode of the present invention, Fig. 2d is a side view of the upper screw and lower screw portion according to the wooden invention, ) is a side view of the anode of the present invention, (b) is a city view of the anode, and FIGS. 4 to 6 are side views showing the state when replacing the anode according to the VC of the present invention. J: Cover, 2: Benefit, 4: Upper screw part, 5: Upper screw, 6
: Square head, 7: Bottom thread, 8: Bottom thread, 9: Shaft, 10.1
0a, lOb near node, 1]a: volt, 11b
: Nut, 12: Support, D is lower screw diameter, 1] 2: Lower screw diameter, D3 near node diameter. 2nd layer (e) (αnman 3sen

Claims (1)

[Claims] A sea chest that provides an inlet for seawater into the ship.It has a cylindrical shape and is attached to the hull's outer panel so that one end goes into the seawater and the other end goes inside the ship, and a female thread is cut on the inside surface. The upper screw washer and the lower screw washer, which has the same female screw structure as the upper screw washer in the sea chest and are fixed to the hull outer panel with the same center, are attached vertically with the same center axis. Male threads of the same diameter are cut to form an integral structure, and the upper threaded part fits into the upper screw seat, and the lower threaded part fits with the lower screw holder and can rotate, and as it rises, the upper threaded part rises. The lower screw part fits into the upper screw seat before coming out of the screw seat, sealing the intrusion of seawater into the ship. and an anode that passes through the upper screw seat as the lower screw portion rises and is removable in a state where the lower screw portion fits into the upper screw seat to seal the intrusion of sea or water into the ship. Replaceable sea chest anode.