JPS5911106Y2 - Rapture hatch - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a rupture hatch.

Conventionally, in the case of oil tanks, etc., when the internal pressure rises abnormally, the ruffure hatch is designed to quickly blow off the lid and prevent a disaster from occurring, by welding a partially spherical head plate inside the cylindrical hatch coaming with the top facing downward. There are some models in which the head plate is reversed when the internal pressure increases, causing the weld to buckle and break, but even if the center of the head plate is reversed, the peripheral part does not easily turn over and the weld does not break. .

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 rupture hatch of the present invention will be explained below based on illustrative drawings.

In Figures 1 to 5, 1 is the oil tank deck, 2 is a square hatch, 3 is a square hatch coaming provided around the hatch 2 on the deck 1, and 4 is a hatch coaming installed inside the hatch coaming 3. It is a curved board.

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 this curved plate 4 are each supported by a pair of upper and lower claws 5 and 6 provided at multiple locations on the opposing inner wall surface of the hatch coaming 3, and the parallel curved side edges are each supported by a hatch coaming. Only the lower side of the curved plate 4 is supported by claws 6 provided at multiple locations on the other opposing inner wall surfaces of the curved plate 4.
/cm') is received by the pair of upper and lower claws 5 and 6,
It is fixed in such a way that it can easily flip upwards when stronger pressure is applied.

An adhesive sealant 7 is applied between the upper and lower sides of the 4 side edges of the curved plate 4 and the hatch coaming 3 to seal the space, and the claws 5, 6 are sealed.
is embedded in the adhesive sealant 7.

As the adhesive sealant 7, silicone rubber or the like having excellent water resistance, weather resistance, ozone resistance and heat resistance is suitable.

In addition, a pair of upper and lower claws 5 supporting the straight side edges of the curved plate 4
, 6, the work of arranging the curved plate 4 is easy if the upper claw 5 is constructed by a bolt 8 penetrating the side wall of the hatch coaming 3 as shown in FIG.

According to the rupture hatch of the present invention, the curved plate stretched in the square hatch coaming with the curved convex part on the lower side has four parts.
Since the side edges are supported on the lower side by the projections of the hatch coaming, there is no risk of them falling unexpectedly downward, and the pair of upper and lower projections supports the straight side edges even when subjected to normal fluctuating pressure inside the tank. The upper protrusion is able to withstand the pressure sufficiently, and if it receives any more dangerous internal pressure, the entire body will easily flip upwards, and the straight edges on both sides will overcome the protrusion that locks the upper part, ensuring that it will be blown away. Therefore, a highly reliable love hatch can be obtained.

Furthermore, since the curved plate is partially cylindrical, it is easier and cheaper to manufacture than the conventional partially spherical mirror plate.

Maintenance is also relatively easy.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line AA in Fig. 1, Fig. 3 is a sectional view taken along BB in Fig. 1, and Fig. 4 is a sectional view taken along line C-- 5 is a sectional view taken along the line DD in FIG. 1, and FIG. 6 is a sectional view of another embodiment. 3... Hatch coaming, 4... Curved plate, 5, 6... Nail, 7... Adhesive sealant, 8... Bolt .

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 part is on the lower side, and the straight side edges of the curved plate are provided at multiple locations on the inner wall of the hatch coaming. In addition to being supported by a pair of upper and lower projections, each of the curved side edges was supported only on the lower side by projections placed in parallel on the inner wall of the hatch coaming, and the space between this curved board and the hatch coaming was sealed with an adhesive sealant. Rapture hatch.