JPS5838239Y2 - Small high pressure gas cylinder - Google Patents

Description

[Detailed description of the invention] This invention relates to a small high-pressure gas cylinder with a safety sealing plate.
This is intended to prevent various dangers caused by the sudden breakage of the sealing plate due to the sudden rise in pressure of the high-pressure gas inside the cylinder.

For example, if an unused gas cylinder is dropped into a fire and the internal pressure rises abnormally due to a rise in ambient temperature, the relatively thin sealing plate bulges due to the external force and then suddenly ruptures and explodes. , the cylinder itself may fly off in an unspecified direction, creating an extremely dangerous situation.

Therefore, in order to avoid the above-mentioned danger, a gas cylinder I using a safety sealing plate 2 as shown in FIG. In the small recess 3 formed in the shape of a forest,
The relative dimension between the opening area facing the recess and the thickness of the sealing plate appearing at the bottom of the opening is extremely strict, and the mass production of a safety sealing plate always satisfies this condition. is extremely difficult.

This is because the internal diameter of the concave part of the seal plate, which is required as a safety seal plate based on small gas cylinders to prevent gas leakage when the button is pressed in the event of an abnormal increase in internal pressure, is 0.8 Mφ or less, and the depth dimension of the concave part is required. The thickness of the sealing plate after subtracting the amount is 0.0
It is clear from the results of experiments that the thickness is limited to 8 mm or less, and if it does not fall within this range, it can no longer function as a safety sealing plate.

Therefore, creating a recess that meets this condition on the sealing plate requires extremely sophisticated techniques and heat rays.
However, regardless of whether the button is forged or cut, the manufactured sealing plate is not a safe seal due to the wear of the mold, the wear of the tip of a cutting tool such as a drill or cutting tool, and the precision of the machine. It cannot be determined by mere visual judgment whether the plate meets the above-mentioned conditions or not, and as a result, the production of defective products is unavoidable, resulting in a significantly poor yield.

Therefore, in order to solve these technical problems and further ensure the safety of the gas cylinder, the present inventors provided a cross-shaped concave groove in place of the small concave part 3 in the conventional sealing plate described above. He proposed this idea and tried various experiments.

The above results were good and it was confirmed that commercialization is possible.

However, the range of the above-mentioned cross-shaped grooves that split due to an abnormal increase in the internal pressure of the cylinder is not necessarily uniform; In some cases, the opening button is pressed at 1 near the welded part of the sealing plate, and in that case, the function of the safety sealing plate to release the internal pressure little by little may be slightly diminished.

In view of the above-mentioned points, this invention has been developed through various research and experiments to solve the problems, and has made it possible to ensure the safety of gas cylinders and mass-produce homogeneous and suitable products. Specifically, the sealing plate is provided with a local endless rib that surrounds a portion corresponding to a part of the cylinder opening area, and at least two ribs are provided inside the rib.
It is characterized by having grooves in which the stripes intersect.

The specific content of the present invention will be explained below with reference to FIGS. 2 and 3 showing an embodiment of the invention. Reference numeral 12 indicates a sealing plate made of a thin metal plate that is sealed to the opening of the gas cylinder I; An endless rib I3 is formed in the center of the sealing plate by a local perfect circular recess that surrounds a portion corresponding to a portion of the cylinder opening area to be closed.

The shape of the endless ribs 3 is not necessarily limited to a perfectly circular shape, and may be, for example, an oval shape or a rectangular shape.

Further, there are no particular limitations on the shaping method, and generally, pressure pressing using a mold is considered to be the simplest method.

Reference numeral 14 indicates a concave groove formed inside the endless rib 13, and in this case, two long grooves are buttoned perpendicularly to form a cross shape, but the present invention is not necessarily limited to this. It is also possible to have a shape in which three or more long grooves intersect.

Regarding the problem of the cutting depth of the groove, it is necessary to approximate the range of mutually optimal conditions in relation to the cutting width of the groove.

Further, the same applies to the width and depth of the groove in the endless rib I3, and although no particularly difficult restrictions are imposed, the shape and depth of the groove 14 described above, etc. In relation to this, when the internal pressure of the gas cylinder (■) rises abnormally, the groove 14 is torn apart, and the cracks caused by the rupture at that time do not reach outside the endless rift 13. As long as the width and depth are sufficient, the purpose of the present invention can be achieved.

Since the present invention is as described above, the sealing plate I2
A partial crack is formed in the cross-shaped concave groove 14, from which gas can be ejected little by little. Since it is fixed only on the inside of the endless rib 13, it will never expand more than necessary, and compared to the conventional safety side plate, the above-mentioned crack will not expand unnecessarily. Since there is no sudden gas ejection, there is no risk of the cylinder flying off, and various beneficial effects can be achieved, such as being able to obtain a high-quality gas cylinder that is extremely reliable as a safety sealing plate.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cross-sectional view of a main part of a conventional gas cylinder with a safety seal plate, Fig. 2 is a plan view of a gas cylinder according to an embodiment of the present invention, and Fig. 3 is an A--A in Fig. 2. A
FIG. 3 is an enlarged cross-sectional view of the main part in the line arrow direction. DESCRIPTION OF SYMBOLS 11... Gas cylinder, 12... Peeling board, 13... Ribbon-shaped riff, 14... Cross-shaped groove.

Claims (1)

[Scope of utility model registration request] The sealing plate is provided with a local endless rib that surrounds a part corresponding to a part of the opening area of the cylinder, and a groove in which at least two intersecting grooves are provided inside the rib. Small high pressure gas cylinder