JPH02140504A - Compact pressure vessel - Google Patents

Abstract

PURPOSE:To make a valve open in the case of overheating so as to avoid the danger of explosion by providing a releasing device made of shape-memory alloy of which the outer edge is fixed to a valve mechanism and the inner edge is attached to a stem in such a manner as to be movable in the axial directions of the stem and by forming on the outer surface of the stem a catch engaging the releasing device for pushing in the stem at the time of abnormality. CONSTITUTION:When the vessel is heated to a specified temperature, a releasing device 15 undergoes deformation into a shape in memory, which acts on a stepped catch 23 engaging the inner part 17 of the releasing device 15 in such a manner as to push a stem 7 into the main body. As a result, a valve mechanism opens and releases gas, such as LPG, contained in the vessel 1. The setup is restored to its normal state when the heating stops and the temperature falls below the specified point. When the stem 7 is pushed in from its projecting position during the normal use, the stem 7 moves inward in contact with a stem rubber 9 and a closing spring 13 but the gas is delivered normally, since the releasing device 15 is not affected by the deformation of the stem rubber 9. Therefore, an improvement can be achieved in safety and practicality.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to gas cylinders for portable gas stoves and other gas appliances, and to small-sized containers such as filled containers whose contents are sprayed or spewed out when the pressure is expanded through a valve. Pressure, per container.

(Prior Art) Since this type of container is sealed with a valve, there is a risk of an accident if it is accidentally thrown into a fire.

Ru.

(Technical issue) To prevent this, it would be possible to destroy the valve in advance or make a hole in the container, but it is impossible to do this for all cases, and there is still no technology to prevent explosions.

Not disclosed.

The purpose of the present invention is to solve the above-mentioned problem, and when the valve is overheated, the valve is forcibly opened and the residual gas is actively released, thereby avoiding the danger of explosion.Furthermore, the heating stops and the set temperature To provide a small pressure vessel which returns to its original state when returned to the following conditions. There is one thing.

(Technical means j) The above object is to attach a stem equipped with a discharge port exposed to the outside of the main body to a valve mechanism that controls the discharge of the contents filled in the container main body so that the valve can be closed and opened by moving in and out. An opening member fixed at its outer end to the valve mechanism is attached such that its inner end is movable in the stem axis direction, and an engagement member is provided on the outer surface of the stem to engage with the opening member and push the stem in the event of an abnormality. This is achieved by a small pressure vessel in which a joint is formed and the opening member is made of a shape memory material.

(Example) To explain with reference to the drawings, each figure shows an example of a gas cylinder used for a portable gas stove etc. 1 is a cylindrical container body, 2 is a mountain cup at the tip, 3 is a gas cylinder used for a portable gas stove, etc. is a housing for a valve mechanism, which has a valve chamber 5 communicating with the siphon pipe 4, and is caulked and fixed to the holding cylinder part 6 of the mountain cup 2 at its upper end.

Reference numeral 7 denotes a stem, which is vertically incorporated into the valve chamber 5 through the center hole 8 of the holding cylinder 6, and a stem rubber 9 fixed between the upper end of the housing 3 and the outer end 6a of the holding cylinder. The stem 7 is held in place by engaging with a groove lO on the outer periphery. 11 is a gas passage blocked by stem rubber 9;
When the stem 7 is pushed in, the discharge lower a in the stem, the side passage 12 of the valve chamber 5, and the siphon pipe 4 are brought into communication. 13
is a closing spring that pushes the stem 7 in the protruding direction within the valve chamber.

The opening member 15 is provided on the inner surface of the housing 3 of the valve mechanism such that the outer portion I6 is fixed and the inner portion I7 is engaged with the outer surface of the stem 7.

The first example is shown in FIG.
5, the outer part 16 is located between the mounting notch 18 formed on the upper end surface of the stem rubber 9 supporting the stem 7 and the inner end 6a of the holding cylinder part 6 which corresponds to the end of the container body 1. A hollow space 19 is formed in the stem rubber 9 held and inside the opening member 15 to allow the opening member 15 to deform. On the other hand, the inner part 17 of the opening member 15 engages with an engaging part 20 formed in a step shape on the outer surface of the stem 7. When the opening member 15 is brought into contact with the inner end 6a as in this example, the deformation force generated in the opening member 15 at the set temperature is backed up by the inner end 6a, which is convenient for pushing the stem 7 into the upper rod.

On the other hand, the second example shown in FIG. 4 is a stem.

This is an example in which the opening member 15 is provided in the valve chamber that is downwardly away from the rubber 9. Since there is sufficient space at the installation site, it is easy to assemble the opening member 15, and there are spaces 21.
22, there is no need to provide a space for it as in the previous example. The outer part 16 of the opening member 15 is embedded in the inner wall of the housing, and the inner part 17 engages with a stepped engagement part 23 formed on the outer surface of the stem on the inner side of the gas passage 11.

The opening member 15 has a ring shape with a hole 24 in the center through which the stem 7 passes, and the inner part 17 is connected to the outer part 1 at a set temperature.
It is formed of a metal material that has a memorized shape that deforms in the stem axis direction relative to the stem. Fig. 5(a) shows an example of the opening member 15, which is a ring-shaped object that deforms into a forest shape when heated, and Fig. 5(b) shows another example, in which a part of the ring is broken like a C-washer. When heated, the inner end portion 17 deforms so as to relatively protrude to both sides in the axial direction.

(Function) When the container of the present invention configured as described above is heated for some reason and reaches the set temperature, the opening member 15 deforms into the memorized shape and the stepped engagement at the inner part 17 is performed. Since the stem 7 is pushed into the main body at portions 20 and 23, the valve mechanism opens and the gas such as LPG filled inside the container main body 1 is released.

Furthermore, when the heating stops and the temperature falls below the set value, the normal state will be restored.

During normal use, when the stem 7 is pushed in from the protruding state to the retracted state, the stem 7 contacts the stem rubber 9 and the closing spring 13 and moves inward, as shown in the half of Figure 2, but when the stem 7 is opened, Since the member 15 is not related to the deformation of the stem rubber 9, gas is normally discharged.

(Effects) Therefore, when the small pressure vessel of the present invention is heated and reaches the set temperature, the opening member formed by the shape memory material deforms, directly moves the stem at its free end, and the valve mechanism immediately opens, causing a fire. There is no risk of explosion even if the product is dumped inside, and it will return to its original state once the temperature drops below the set temperature.
It exhibits remarkable effects such as high safety and practicality.

[Brief explanation of the drawing]

The drawings show a small pressure vessel according to the present invention; Fig. 1 is a side view, Fig. 2 is a sectional view of the main part, Figs. 3 and 4 are sectional views of two embodiments, and Fig. 5 (a). , (b) are sectional views of two examples of open members. 1... Container body, 5... Valve chamber, 7... Stem, 9
... Stem rubber, 15... Opening member, 16...
Outer end portion, 17... Inner end portion, 20.23... Engaging portion. Patent applicant Sun Frontier Technology Co., Ltd. Agent
Patent Attorney Tadashi IzawaFigure 1Figure 4Figure 3

Claims (1)

[Claims] A stem having a discharge port exposed to the outside of the main body is attached to a valve mechanism that controls the discharge of the contents filled in the container main body so as to be able to close and open the valve by protruding and retracting, and the stem is fixed at the outer end to the valve mechanism. an opening member is attached such that its inner end is movable in the stem axial direction, and an engaging portion is formed on the outer surface of the stem to engage with the opening member and push the stem in the event of an abnormality;
A small pressure vessel in which the opening member is formed of a shape memory material.