JPH0414244B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to small pressure vessels (for example, gas containers for portable gas stoves and various aerosol containers).
In particular, the present invention relates to a small pressure vessel that can prevent an explosion accident of the pressure vessel during incineration treatment at the time of disposal.

<Prior Art> Generally, a gas container for a portable gas stove includes a spout valve 2 at one end of a gas container main body 1, as shown in FIG. 8, for example. The spout valve 2 includes a housing 3 fixed within the gas container main body 1, a valve body 5 inserted into a valve chamber 4 formed within the housing 3 so as to be movable forward and backward, and housed within the valve chamber 4. And valve body 5
It includes a valve closing spring 6 made of a compression coil spring that presses the valve to the valve closing position, and a stem 7. The stem 7 is formed integrally with the valve body 5 and protrudes outwardly from the gas container body 1 so as to be movable forward and backward. The spout valve 2 is opened by pushing the stem 7 into the gas container body 1 against the valve closing spring 6.

<Problems to be solved by the invention> By the way, this type of pressure vessel is sometimes incinerated as disposal after use, and in this case, the internal pressure of the pressure vessel may rise and the pressure vessel may explode. . Explosions of pressure vessels can cause injuries such as burns to people around them, so a safe method of incineration that can avoid such dangers is written as a warning on the pressure vessel itself and the case in which it is stored when sold. It is shown. The most common method of safe incineration is to drill a hole in the pressure vessel body before incineration.

However, it is not so easy to make a hole in the pressure vessel body, which is made sturdy enough to withstand the internal pressure during normal use, and the user may be too lazy to incinerate it or dump it without making a hole. In some cases, used pressure vessels are incinerated along with the dust without realizing that they are mixed in with the dust.

The present invention has been made in consideration of the above circumstances, and prevents explosion of the container by automatically opening the spout valve to relieve pressure when the temperature of the pressure container exceeds a predetermined value. The object of the present invention is to provide a small pressure vessel capable of preventing the above.

<Means for Solving the Problems> In order to achieve the above object, the small pressure vessel according to the present invention has the above-mentioned spout valve 2 as shown in FIGS. 1 and 2 or 3, for example. A temperature-sensitive valve opening operation member 16 made of a shape memory alloy is provided, and the spouting valve 2 is held in the closed state by the pressing force of the valve closing spring 6 until a predetermined temperature is reached.
It is characterized in that the temperature-sensitive valve-opening operation member 16 is deformed to open the spouting valve 2 against the pressing force of the valve-closing spring 6 when the temperature exceeds a predetermined temperature.

<Function> According to the present invention, when a used pressure vessel is thrown into a fire and reaches a predetermined temperature, the temperature-sensitive valve opening operation member opens the pouring valve to release the pressure. Since the internal pressure of the container is prevented from reaching a high pressure, explosion of the pressure container is prevented.

The temperature at which the temperature-sensitive valve opening operation member deforms and opens the spout valve can be freely set within a range that is higher than the maximum allowable temperature of the pressure vessel during normal use, but lower than the temperature that could cause an explosion. do it.

Further, the shape of the temperature-sensitive valve opening operation member is not particularly limited, and may be formed into a coil shape or a plate shape, for example.

<Example> Hereinafter, a case where an example of the present invention is applied to a gas container for a portable gas stove will be described.

FIG. 1 is a vertical cross-sectional view showing the spout valve in the open state of a gas container for a portable gas stove according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view showing the spout valve in the closed state. It is a front view.

This gas container for a portable gas stove has a general structure shown in FIG. That is, a gas container main body 1 is provided with a spout valve 2 at one end, and this spout valve 2 is a housing fixed within the gas container main body 1 via a mountain cup 8 for loading the gas container into a portable gas stove. It has 3. A valve body 5, a valve closing spring 6, and a seal member 9 are housed in a valve chamber 4 formed within the housing 3. The valve body 5 is inserted into the valve chamber 4 so as to be movable back and forth, and a stem 7 is formed in series at the outer end of the valve body 5. The outer end of the stem 7 protrudes outward from the mountain cup 8 at one end of the gas container body 1 so as to be movable forward and backward, and a gas outlet 10 is formed along its axis. As shown in detail in FIGS. 1 and 3, a groove 11 is formed at the outer end of the circumferential surface of the valve body 5, and the bottom surface of the groove 11 communicates the valve chamber 4 with the gas outlet 10. The valve hole 12 is opened. The seal member 9 is made of an elastic material such as rubber and has an annular shape, and its peripheral portion is held between the mountain cup 8 and the outer end surface of the housing 3. Further, the inner peripheral portion of the seal member 9 is fitted into the groove 11 of the valve body 5. When the valve is closed and the stem 7 is fully extended to the outside of the cylinder, the seal member 9 is fitted horizontally into the groove 11 and closes the valve hole 12 with its inner peripheral surface, as shown in FIG. It's summery. In addition, when the stem 7 is pushed into the inside of the container in the open state, the stem 7 is fitted obliquely into the groove 11 as shown in FIG. It's becoming like that. The valve closing spring 6 is connected to the inner bottom surface 13 of the valve chamber 4 and the valve body 5 so as to press the valve body 5 to the valve closing position.
Here, one end of the valve closing spring 6 is press-fitted into the locking groove 14 formed in the deep bottom surface 13 of the valve chamber 4, and the other end is inserted between the It is press-fitted and locked into a locking groove 15 formed in the middle part of the valve body 5.

Incidentally, this spouting valve 2 is provided with a temperature-sensitive valve opening operation member 16 made of a shape memory alloy that deforms so as to open the spouting valve 2 at a predetermined temperature or higher.

That is, the temperature-sensitive valve opening operation member 16 is formed in a coil shape with a smaller coil diameter than the valve closing spring, and one end thereof is connected to the locking groove 17 formed in the inner bottom surface 13.
The valve body 5 is press-fitted and locked, and the other end is locked with an engagement ring 18 that is fitted onto the middle part of the valve body 5. An inner end surface 19 of an engagement ring 18 is provided in the middle part of the valve body 5.
An engagement stepped surface 20 is formed to receive the engagement. In the normal operating temperature range of the gas container, the engagement ring 18 is positioned outwardly from the engagement stepped surface 20 of the valve body 5 in the closed position as shown in the imaginary line in FIG. 1 or in FIG. However, when the temperature of the gas container exceeds a predetermined temperature and the temperature-sensitive valve opening operation member 16 deforms to the set state as shown in FIG. The valve body 5 is engaged with the stepped engagement surface 20 that has been moved, and moves the valve body 5 against the valve-closing spring 6 to the valve-open position.

According to this gas container for a portable gas stove, during normal use, the temperature-sensitive valve opening operation member 16 extends and does not interfere with the opening/closing operation of the valve body 5, but when the gas container is thrown into a fire and the temperature exceeds a predetermined temperature. When the temperature-sensitive valve-opening operation member 16 contracts to the set state and moves the valve body 5 to the valve-opening position, when the gas container is put into the fire and the temperature exceeds a predetermined temperature, the discharge valve closes. Since the valve 2 is opened and the pressure of the gas container is released, the internal pressure of the gas container will not rise above a certain level, and explosion of the gas container can be reliably prevented.

In another embodiment of the present invention, for example, as shown in FIG. 3, the valve closing spring 6 is made of a shape memory alloy and is also used as the temperature-sensitive valve opening operation member 16. in this case,
One end of the valve closing spring 6, which also serves as the temperature-sensitive valve opening operation member 16, is locked to the housing 3 using a retaining ring 21. Further, the other end of the temperature-sensitive valve opening operation member 16 is externally fitted and locked in a circumferential groove 22 formed on the circumferential surface of the valve body 5.

The other configurations are the same as the above embodiment,
Further, since the operation is the same as that of the above embodiment except that the valve closing spring 6 acts as a temperature-sensitive valve opening operation member 16, a description thereof will be omitted.

In each of the above embodiments, the temperature-sensitive valve opening operation member 16
is formed in a coil shape, and is configured to shorten and open the spout valve 2 when the temperature reaches a predetermined temperature. It may be configured to expand and open the spouting valve 2 when the temperature reaches the temperature or higher.

In another embodiment of the present invention, for example, as shown in FIG. 4, the temperature-sensitive valve opening operation member 16 is formed into a flat plate shape, and when the temperature reaches a predetermined temperature or higher, the temperature-sensitive valve opening operation member 16 opens as shown by the imaginary line in FIG. The inner peripheral portion is configured to be deformed into a tapered surface shape in the valve opening direction to open the spouting valve 2.
Here, the flat plate-shaped temperature-sensitive valve opening operation member 16 is inserted between the mountain cup 8 and the seal member 9.
It may be inserted between the temperature-sensitive valve opening operation member 16 and the housing 3, and the inner peripheral portion of the temperature-sensitive valve opening operation member 16 may be configured to fit into the groove 11 of the valve body 5.

The rest of the structure is similar to the embodiment shown in FIG. In this case, the retaining ring 21 may be omitted.

When such a plate-shaped temperature-sensitive valve-opening operation member 16 is used, it is smaller and has a simpler shape than the coil-shaped temperature-sensitive valve-opening operation member 16 shown in FIGS. 1 and 2. In addition, it is easy to manufacture and has high assembly workability.

When the temperature-sensitive valve opening operation member 16 is formed into a flat plate shape, it is not an essential requirement that the inner peripheral portion be deformed into a tapered surface shape at a temperature higher than the transformation temperature. It may be transformed into
It may also be deformed into a spiral plate shape as shown by the imaginary line in FIG.

In the present invention, the temperature-sensitive valve opening operation member 16 is the third
As shown in the figure, in the same way that the valve closing spring 6 is made of a shape memory alloy, the mountain cup 8 and the housing 3 can be made of a shape memory alloy, and these can be made to function as the temperature-sensitive valve opening operation member 16. is also possible. Furthermore, it is also possible to configure the valve body 5 to be formed of a shape memory alloy so that the valve body 5 functions as the temperature-sensitive valve opening operation member 16.

Although the present invention has been described above in a case where it is applied to a gas container for a portable gas stove, it goes without saying that the present invention can also be applied to various aerosol containers such as spray containers and paint spray containers.

<Effects of the Invention> As described above, the small pressure vessel of the present invention includes a temperature-sensitive valve opening operation member made of a shape memory alloy that deforms to open the spout valve at a predetermined temperature or higher. By providing a pressure vessel, when a used pressure vessel is thrown into a fire and reaches a predetermined temperature, the temperature-sensitive valve opening operation member opens the pouring valve to release pressure from the pressure vessel, and the pressure vessel is released. Since the internal pressure does not rise above a certain level, the explosion of the pressure vessel can be prevented.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing a spout valve in an open state of a gas container for a portable gas stove according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view showing the spout valve in a closed state. , FIG. 3 is a vertical cross-sectional view of a spout valve according to another embodiment of the present invention, FIG. 4 is a vertical cross-sectional view of a spout valve according to another embodiment of the present invention, and FIG. Figures 6 and 7 are longitudinal cross-sectional views of the valve operating member, and Figure 8 is a longitudinal cross-sectional view of a flat temperature-sensitive valve opening operating member with different shapes at the transformation temperature. It is a longitudinal cross-sectional view showing the schematic structure of a filtration gas container. DESCRIPTION OF SYMBOLS 1... Pressure vessel main body (gas container main body), 2... Output valve, 5... Valve body, 6... Valve closing spring, 16... Temperature-sensitive valve opening operation member.

Claims (1)

[Claims] 1. A spout valve 2 is provided at one end of the pressure vessel body 1,
The valve body 5 of the spouting valve 2 is pressed to a closed state by a valve closing spring 6, and the spouting valve 2 is opened by pressing the valve body 5 against the valve closing spring 6. In the constructed small pressure vessel, the spout valve 2 is provided with a temperature-sensitive valve opening operation member 16 made of a shape memory alloy, and the spout valve 2 is operated by the pressing force of the valve closing spring 6 until a predetermined temperature is reached. is held in a closed state, and the spout valve 2 is opened against the pressing force of the valve closing spring 6 by deformation of the temperature-sensitive valve opening operation member 16 at a temperature higher than a predetermined temperature. A small pressure vessel characterized by: 2. The small pressure vessel according to claim 1, wherein the temperature-sensitive valve opening operation member 16 is formed in a coil shape. 3. The small pressure vessel according to claim 1, wherein the temperature-sensitive valve opening operation member 16 is formed in a plate shape. 4. The small pressure vessel according to claim 1, wherein the small pressure vessel is a gas container for a portable gas stove. 5. The small pressure vessel according to claim 1, wherein the small pressure vessel is an aerosol container.