JPS5911105Y2 - Rapture hatch - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to Loveture Hatch.

Conventionally, in oil tanks, etc., when the internal pressure suddenly rises abnormally, the love hatch is designed to prevent the lid from blowing off and causing a disaster.A partially spherical head plate is welded inside the cylindrical hatch coaming with the top facing downward. In some cases, when the internal pressure increases, the head plate is reversed and the welded part is buckled and broken, but even if the center part of the head plate is reversed, the peripheral part does not easily turn over and the welded part may not break. Ta.

The present invention attempts to propose a rupture hatch that has a simple structure and eliminates the above-mentioned drawbacks.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The Loveture hatch of the present invention will be explained below based on illustrative drawings.

1 is a deck of an oil tank, 2 is a rectangular hatch, 3 is a rectangular hatch coaming provided around the hatch 2 on the hatch 1, and 4 is a curved plate stretched within the hatch coaming 3.

The curved plate 4 is a rectangular plate partially curved into a cylindrical shape.
The curved convex portion is on the lower side.

The parallel straight side edges of the curved plate 4 are intermittently welded to the opposing inner walls of the hatch coaming 3 at a plurality of locations on the upper side.

5 indicates the welded portion. The total length of the welded portions 5 is approximately 10% to 50% of the entire side edge.
The welding should be weak enough to withstand the load (kg/cm").

The remaining unwelded portions of the side edges and the spaces between the curved side edges and the hatch coaming 3 are sealed by applying an adhesive sealant 6 to the upper and lower sides of the curved plate 4, respectively.

The adhesive sealant 6 may be applied only to the upper side of the curved plate 4.

As the adhesive sealant 6, a material having excellent water resistance, weather resistance, ozone resistance, and heat resistance, such as silicone rubber, is used.

In the above structure, when a predetermined tank internal pressure is applied to the curved plate 4, the curved convex portion on the lower side of the curved plate 4 is reversed upward, and the welded portion 5 on both straight edges of the curved plate 4 is turned upward. Bending load is applied.

In this case, since the welded portions 5 are provided intermittently, each of the welded portions 5 receives a large force and easily breaks all at once, causing the curved plate 4 to be blown off.

According to the loveture hatch of the present invention, the partially cylindrical curved plate has a simpler structure and is easier to manufacture than the conventional partially spherical end plate, and maintenance requires only occasional replacement of the adhesive sealant. It is simple, and since it reliably breaks and blows away under a predetermined tank internal pressure, an economical and highly reliable love hatch can be obtained.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a sectional view taken along line AA in FIG. FIG. 2 is a sectional view taken along line CC in FIG. 1; 3...Hatch coaming, 4...Curved plate, 5...Welded portion, 6...Adhesive sealant.

Claims (1)

[Scope of utility model registration request] A partially cylindrical curved plate is stretched in a rectangular hatch coaming so that the curved convex portion is on the lower side, and the straight side edges of the curved plate are welded to the hatch coaming at multiple points. , a loveture hatch in which the non-welded portions of both side edges and the spaces between the curved side edges and the hatch coaming are each sealed with an adhesive sealant.