JP2565956Y2 - Electro-corrosion protection device for steel tank inner surface - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosion device for an inner surface of a steel tank such as a crude oil storage tank or a tanker.

[0002]

2. Description of the Related Art Heretofore, an anticorrosion device for an inner surface of a steel vessel has a current-carrying anode body having a required length and a rectangular cross section, and is buried in the longitudinal direction inside the current-carrying anode body. A core bar, mounting leg plates vertically protruding from the front and rear portions of the core bar to the outside of the lower surface of the galvanic anode body, and welding at right angles to the lower half of one side end surface of each mounting leg plate. A galvanic anode consisting of a plate was used, the galvanic anode body was mounted on the upper surface of the bottom plate of a steel tank, and the welding plate was welded to a bottom flange of the steel tank (actually disclosed in Japanese Unexamined Utility Model Publication No. 17
No. 3159).

[0003]

However, the conventional galvanic anode body is heavy and has poor workability. The galvanic anode body is placed on the upper surface of the bottom plate of a steel tank, and the welding plate is When the galvanic anode body is worn due to welding to the bottom flange, a gap is formed between the upper surface of the bottom plate of the steel tank and the galvanic anode body, and there is a problem that an effective anticorrosive current is difficult to flow.

[0004]

SUMMARY OF THE INVENTION The above-mentioned conventional problems are solved.
Application for registration of a utility model prior to the domestic priority claim
The invention of the invention , on the bottom plate upper surface of the steel tank, welding a reaction force receiving bracket having a horizontal notch hole with a lower edge open at the center of the plate surface, orthogonal to the horizontal notch hole of the reaction force receiving metal, Insert a channel-shaped steel presser fitting with a reaction force imparting bolt screwed in the center, and on the upper surface of the end of the galvanic anode plate laid opposite to the upper surface of the bottom plate of the steel tank around the reaction force receiving metal, The channel steel press
The both side ends of the e fitting each contact, said by causing reaction force applying bolt unscrewing, the reaction force applying bolt head and so as to abut against the edge lower surface on the horizontal notched hole of the reaction force receiving bracket Is the gist. The present invention is a practical new
In the gist of the application for registration of the draft,
It is formed as a tubular steel holding bracket.

[0005]

According to the device of the present invention, the galvanic anode plate is laid on the upper surface of the bottom plate of the steel tank, so that the weight is lighter than the conventional galvanic anode body having a rectangular cross section, so that workability is improved. The non-uniform wear is small, and by simply operating the reaction force applying bolt, the countercurrently laid anode plate can be simultaneously fixed to the upper surface of the bottom plate of the steel tank via the holding metal. It is extremely easy to electrically connect and fix the plates, and even if the galvanic anode plate is worn out and thinned, the galvanic anode plate can be in close contact with the upper surface of the bottom plate of the steel tank, which is always effective. An anticorrosion current can flow.

FIGS. 1 and 2 show the above-mentioned utility model registration application.
A first embodiment according to the present invention is shown, and a reaction force receiving metal fitting 2 having a horizontally long cutout hole 2a with an open lower edge at the center of the plate surface is welded to the upper surface of a bottom plate 1 of a steel tank, At right angles to the horizontally elongated notch hole 2a of the reaction force receiving member 2, a channel-shaped steel holding member 3 into which a reaction force applying bolt 4 is screwed is inserted into a central portion of the web 3a, and the reaction force receiving member 2 is removed. The flanges 3b on both sides of the channel-shaped steel presser fitting 3 are respectively brought into contact with the upper surface of the end of the galvanic anode plate 5 laid opposite to the upper surface of the bottom plate 1 of the steel tank, and the reaction force applying bolt 4 is attached. The head of the reaction force imparting bolt 4 is screwed away so that the reaction force receiving bracket 2
The anode plate 5 is placed in contact with the bottom plate 1 of the steel tank by abutting the lower surface of the upper edge of the horizontally long notch hole 2a through the flanges 3b on both sides of the channel-shaped steel presser fitting 3 pressed down.
It can be fixed on the upper surface together with electrical conduction.

FIG. 3 is a schematic diagram of the above-mentioned utility model application.
In the second embodiment according to the present invention, as the reaction force imparting bolt, a detent wing piece 14 that engages with the upper end of the horizontally elongated cutout hole 2a of the reaction force receiving bracket 2 at the bolt head.
a, and a nut 6 is screwed into the wing bolt 14, and the lower end of the wing bolt 14 is passed through the center of the web 3 a of the channel-shaped steel presser fitting 3. After setting the channel-shaped steel presser fitting 3 in the horizontally elongated notch hole 2a of the force receiving fitting 2, the wing bolt 14 is screwed back to some extent, and the detent wing piece 14a is received by the reaction force receiving fitting 2.
Is engaged with the upper edge both side surfaces of the horizontally elongated notch hole 2a, then the nut 6 is operated to retreat the wing bolt 14, and its head is positioned on the lower surface of the upper edge of the horizontally elongated notch hole 2a of the reaction force receiving bracket 2. It was made to abut.

FIG. 4 is a schematic diagram of the above-mentioned utility model application.
There is shown a third embodiment according to, together with the reaction force receiving bracket is Botomuronji 12 that put a steel tank,
The horizontally long cutout hole is a horizontally long drain hole 12a, and the other configuration is the same as that of the second embodiment shown in FIG.
In each of the embodiments, the insulating coating 7 is applied to the upper surface of the galvanic anode plate 5 around the flanges 3b on both sides of the channel-shaped steel presser fitting 3, and the galvanic anode plate 5 around the flanges 3b on both sides.
Prevent early wear.

As described above, the insulating coating 7 is applied to the upper surface of the galvanic anode plate 5 around the flanges 3b on both sides of the channel-shaped steel presser fitting 3, but this applies to a new steel tank. However, if there is residual water (bilge) on the bottom plate as in a pre-made steel tank, the insulating coating 7 cannot be applied. In this case, as shown in FIG. Required large size anode plate piece 8 with insulation coating 7
Are interposed between the flanges 3b on both sides and the galvanic anode plate 5. The insulating coating 7 in the fourth embodiment shown in FIG. 5 is not always necessary when the galvanic anode plate pieces 8 are overlapped.

[0010] Figure 6, there is shown a sixth embodiment of the present invention, which, utility model registration of the destination indicated in FIG. 4
Instead of the grooved steel presser fitting 3 in the third embodiment according to the invention of the present application, a semi-cut steel tubular presser fitting 3 such as a steel pipe cut in half is used. This is the same as the embodiment.

FIG. 7 shows a sixth embodiment of the present invention, which corresponds to the above-mentioned utility model registration application shown in FIG.
Instead of the channel steel shape bracing 3 in the fourth embodiment according to the invention of are those with half-cut steel tubular bracing 3, others are the same as those of the fourth embodiment shown in FIG. In each of the embodiments, when the bottom plate is regarded as the side wall, the side wall can be simultaneously subjected to cathodic protection.

[0012]

According to the present invention, the galvanic anode plate is laid on the upper surface of the bottom plate of the steel tank, so that it is lighter in weight than the conventional rectangular cross-sectional galvanic anode body, so that workability is good. The non-uniform wear is also small, and by simply operating the reaction force applying bolt, the countercurrent anodic plate
Since it can be fixed to the top surface of the bottom plate of the steel tank at the same time through the holding metal, it is extremely easy to conduct and fix the galvanic anode plate electrically, and when the galvanic anode plate becomes worn and thin However, the galvanic anode plate can be brought into close contact with the upper surface of the bottom plate of the steel tank, so that an effective anticorrosion current can always flow.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment according to the invention of a utility model registration application .

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view showing a second embodiment according to the invention of the utility model registration application .

FIG. 4 is a sectional view showing a third embodiment according to the invention of the utility model registration application .

FIG. 5 is a cross-sectional view showing a fourth embodiment of the invention for a utility model registration application .

6 is a sectional view showing a fourth embodiment of the present invention.

7 is a sectional view showing a fifth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bottom plate of steel tank 2 Reaction receiving bracket 12 Bottom long 2a Horizontal cutout hole 12a Drain hole 3 Channel-shaped steel presser or half-cut tubular presser 4 Reaction force applying bolt 14 Reaction force applying wing bolt 5 Flowing anode plate 6 Nut 7 Insulation coating 8 Current anode plate piece

Claims (3)

(57) [Scope of request for utility model registration] Claims: 1. A reaction force receiving bracket having a horizontally long cutout opening with a lower edge opened at the center of a plate surface is welded to an upper surface of a bottom plate of a steel tank,
At right angles to the horizontally elongated cutout holes of the reaction force receiving bracket, a half- cut steel tubular holding member into which a reaction force imparting bolt is screwed is inserted into the center portion, and the upper surface of the bottom plate of the steel tank is centered on the reaction force receiving bracket. On the upper surface of the end of the galvanic anode plate laid opposite to
By contacting both side ends of the steel tubular holding member and screwing down the reaction force applying bolt, the reaction force applying bolt head is brought into contact with the upper edge lower surface of the horizontally elongated cutout hole of the reaction force receiving metal member. Characteristic anti-corrosion device for steel tank inner surface. 2. A bolt having a detent wing on a bolt head, which is engaged with both upper side surfaces of a horizontally long cutout hole of the reaction receiving bracket, as the reaction applying bolt, and a nut is used as the bolt. 2. The apparatus according to claim 1, wherein a lower end of the bolt is penetrated through a central portion of the tubular steel holding member . Wherein the reaction force receiving bracket, along with a Botomuronji in steel tanks, the Horizontal notched holes, the steel tank inner surface according to claim 1 or claim 2 which is horizontally long drain hole Cathodic protection device.