JP3170190B2 - 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 Conventionally, an anticorrosion device for an inner surface of a steel tank is provided with a current-carrying anode body having a required length and a rectangular cross-section, and is cast in the longitudinal direction inside the current-carrying anode body. And a mounting leg plate vertically projecting from both ends of the core bar to the outside of the lower surface of the galvanic anode body, and a welding portion provided at a right angle to the lower half of one side end surface of each mounting leg plate. The welding plate is welded to a bottom longitudinal surface of a steel tank (see Japanese Utility Model Publication No. 4-41180).

[0003]

However, in the conventional cathodic protection device, since the welding plate is welded to the bottom longitudinal surface, the fixing work of the galvanic anode body requires time and effort.
In addition, there is a problem that it is necessary to rework the burnt portion of the coating film.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its gist is to provide a current-carrying anode body having a required length and a rectangular cross section. An L-shaped support bracket integrally cast together with the metal core and vertically provided from both ends of the metal core, and a vertical shape vertically provided from a central portion of the metal core and shorter than the vertical piece of the support metal. An L-shaped abutment fitting having a horizontal piece and a tightening bolt penetratingly screwed into the horizontal piece, and inserting the horizontal pieces of the bearings at both ends into the lower surface of the upper flange of the bottom flange in the steel tank, The horizontal piece of the contact metal fitting of the part is brought into contact with the upper surface of the upper flange, and the fastening bolt on the horizontal piece of the contact metal fitting is tightened to conduct and fix the galvanic anode body to the upper flange. In the cathodic protection device.

[0005]

FIG. 1 is a front view showing an example of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG. 1, as shown in FIGS. A current-carrying anode body 1 having a required length and a rectangular cross section,
And an L-shaped support 3 which is integrally cast with the metal core 2 and is vertically provided from both ends of the metal core 2, and which is vertically provided from a central portion of the metal core 2. L having a vertical piece 4a shorter than the piece 3a and having a tightening bolt 4d threaded through a horizontal piece 4b through a locking nut 4c.
The cathodic fitting 4 constitutes the cathodic protection device.

The horizontal pieces 3b of the bearings 3 at both ends are provided.
Is inserted into the lower surface of the upper flange 5a of the bottom flange 5 in the steel tank, and the horizontal piece 4b of the contact fitting 4 at the center is brought into contact with the upper surface of the upper flange 5a.
Tighten the tightening bolts 4d at 4b and the locking nuts 4c to secure the horizontal pieces 3b of the support fittings 3 at both ends.
The upper flange 5a is firmly clamped between the upper surface of the contact piece 4 and the tip of the tightening bolt 4d of the horizontal piece 4b of the central contact fitting 4, and the flow anode body 1 is conductively fixed to the upper flange 5a.

[0007]

According to the above-described cathodic protection device of the present invention, the L-shaped contact fitting hanging from the central portion of the galvanic anode main body without using a conventional complicated welding work. With only a very simple operation of tightening the tightening bolts on the horizontal pieces of the above, a steel tank is formed on the upper surface of the horizontal pieces of the L-shaped support fittings hanging vertically from both ends of the galvanic anode body and the tip of the tightening bolts. In this case, the upper flange of the bottom flange can be firmly held, and the galvanic anode body can be conductively fixed to the upper flange. In addition, there is no danger of burning of the coating film due to welding as in the related art.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of the present invention.

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

[Explanation of symbols]

Description of Reference Numerals 1… Current anode body 2… Core metal 3… L-shaped support 3a… Vertical piece 3b… Horizontal piece 4… L-shaped abutment fitting 4a… Vertical piece 4b… Horizontal piece 4c… Locking nut 4d… Tightening bolt 5… Bottom long in steel tank 5a… Top flange

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C23F 13/00-13/22 B63B 59/00

Claims (1)

(57) [Claims] 1. An L-shaped support fitting integrally cast together with a metal core into a current-carrying anode body having a rectangular cross section having a required length, and being suspended from both ends of the metal core. An L-shaped abutment having a vertical piece shorter than the vertical piece of the bearing fitting, having a vertical piece shorter than the vertical piece of the bearing fitting, and a horizontal piece having a tightening bolt threaded therethrough; The horizontal piece of the metal fitting is inserted into the lower surface of the upper flange of the bottom flange in the steel tank, the horizontal piece of the abutment metal at the center is abutted on the upper face of the upper flange, and the tightening bolt on the horizontal piece of the abutment metal is tightened. A cathodic protection device for an inner surface of a steel tank, wherein a galvanic anode body is conductively fixed to an upper flange.