JPH05180359A - Flow controller for liquefied petroleum gas or the like - Google Patents

Abstract

PURPOSE:To facilitate stable flow control by providing a fine porous membrane opposite to a surface side corresponding to the inside of a container forming a flow controller so as to be substantially flush and constantly bringing a membrane surface into tight contact with the surface side by an internal gas pressure. CONSTITUTION:A fine porous membrane 7 is put into tight contact with a surface side corresponding to the inside of a container 1 forming a flow controller by a gas pressure in the container 1 filled with a mixed fuel of liquefied hydrocarbon such as butane, isobutane and propane. Accordingly, the fine porous membrane 7 of a part which comes into tight contact with this surface side does not permeate a gas. Therefore, the flow rate of liquefied petroleum gas or the like in the container 1 is controlled at parts other than the sticking part and the contact part of the fine porous membrane 7, the flow controlled liquefied petroleum is directly discharged from a nozzle 5 via a through hole 3 and ignited. Thus, a stable flow control can be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device or equipment provided in a container containing a fuel such as liquefied petroleum gas and capable of limiting the flow rate of the liquefied gas, for example liquefied petroleum gas used in gas cylinders, gas lighters and the like. Flow restricting device.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Laid-Open No. 1-169953, a tank top lid which is airtightly integrated with an upper opening portion of a gas tank body as an unadjusted valve, and integrally molded in the tank top lid. A fitting recess of the upper opening, a through hole opened in the center of the bottom surface of the fitting recess and communicating with the inside of the gas tank body, a valve press-fitted into the fitting recess, and an opening arranged below the valve. In a non-adjustable valve including a filter that allows a certain amount of gas to pass through when the valve is opened, the permeation filter is fixed to the end surface of the annular spacer by thermocompression bonding, ultrasonic welding or impales welding, and the annular spacer is fitted into the fitting recess. It is press-fitted inside to mount the transmission filter between the valve and the through hole, and a mesh is formed on the upper surface of the transmission filter in front of the surface of the transmission filter. By configuration was arranged to respectively contact the bottom surface of the valve it has been proposed. Page (2)

However, in the conventional non-adjustable valve described above, a net-like body is inserted instead of forming a recess in the end surface of a member constituting the adjusting device to secure an effective gas passage area of the microporous thin film. Therefore, it is necessary to select a reticulated body having appropriate performance for flow rate adjustment, cut it, and insert it, so the cost of parts processing and assembly rises and the product becomes expensive, and the reticulated body is laminated. When a filter is used, the entire inner peripheral surface of the peripheral seal portion has a gas permeation effective area, and it is difficult to make the gas permeation effective area uniform by a fixing method such as various types of fusion, welding, or adhesion. Therefore, the non-uniformity of the gas permeation effective area leads to variations in the gas flow rate, and the adjustment efficiency is extremely poor.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a member constituting a flow rate limiting device with a concave flow path and On the surface side of the member corresponding to the inside of the container, a microporous thin film is installed in a substantially flush manner, and the film surface is always brought into close contact with the surface side by the internal gas pressure, and a special mesh body or this mesh shape is formed. Providing a flow rate limiting device for liquefied petroleum gas, etc. that does not require a member such as an annular spacer for fixing the body, enables stable flow rate limiting, and reduces production cost due to simplification of parts and ease of assembly It is in.

[0005]

[MEANS FOR SOLVING THE PROBLEMS] A flow rate limiting device for liquefied petroleum gas or the like according to the present invention for achieving the above object is a container containing a mixed fuel of butane, isobutane, propane or other liquefied hydrocarbons. In the device for restricting the flow rate of released gas, a microporous thin film is provided in a face-to-face relationship on the surface side corresponding to the inside of the container of the member that constitutes the flow restricting device and that has the concave flow path. The structure is characterized in that the surface is always brought into close contact with the surface side by the internal gas pressure.

Page (3)

The microporous thin film of the present invention corresponds to the inside of the container of the constituent member of the flow rate limiting device by the pressure of the gas in the container filled with the mixed fuel of butane, isobutane, propane and other liquefied hydrocarbons. Close to the face side. Therefore, the microporous thin film in the intimate contact portion is impermeable to gas. That is, in the microporous thin film that allows gas to pass through, the flow rate of the gas is determined only by the recessed channel portion of the member and the porous portion of the microporous thin film and the plane area of the recessed channel. .. As described above, the flow rate of the liquefied petroleum gas or the like in the container is limited except for the fixed portion and the close contact portion of the microporous thin film, and is discharged from the nozzle through the through hole as it is and ignited by a predetermined ignition means or the like.

[0007]

EXAMPLE Next, an example of a flow rate limiting device for liquefied petroleum gas or the like according to the present invention will be described with reference to FIGS. 1 and 2. The flow rate limiting device according to this example has a lower end face of a nozzle housing and The lower end surface of the valve seat member that fits in the above is made flush, and a microporous thin film is provided opposite to both end surfaces of the valve seat member. The fuel container 1 and the opening of the container 1 are fitted together. A nozzle housing 2, a nozzle 5 fitted into the nozzle housing 2 and having a valve body 4 corresponding to a lower portion of a through hole 3 penetrating through the center thereof, and a bottomed type fitted into the nozzle housing 2. It is composed of a valve seat member 6, a nozzle housing 2 and a microporous thin film 7 provided on the lower surface of the valve seat member 6, and the container 1 is made of metal or synthetic resin.
A mixed fuel of butane, isobutane, propane and other liquefied hydrocarbons is filled inside.

The nozzle housing 2 is formed of a synthetic resin such as polypropylene in a container shape having an open lower part. The nozzle 5 is inserted into a through hole formed in the upper surface and the lower end 8 is formed in the container 1. It is attached to the container 1 while facing the inside.

The nozzle 5 is made of metal and has a step 9 on the outer periphery of the lower portion.
The recessed portion 10 having a shape matching the valve body 4 for receiving the valve body 4 is provided in the lower portion of the through hole 3, and the bulging head locking portion 11 is provided in the upper portion, and the bulging page (4) Locked up / down lever (not shown)
It is inserted into the nozzle housing 2 so that it can be raised and lowered freely. A spring 12 is mounted on the outer circumference of the nozzle 5, one end of which is brought into contact with the nozzle housing 2 and the other end of which is brought into contact with the stepped portion 9, and the nozzle 5 is elastically pressed downward by the spring 12 so that the valve body 4 is recessed. And the through hole 3 is closed.
Further, by operating the nozzle raising / lowering lever, the nozzle is pulled up to open the through hole 3 to allow the gas to be released.

Next, the valve seat member 6 is formed into a bottomed container shape by zinc die casting or cold forging of aluminum or the like, and a recess-shaped flow passage 14 is formed on the lower surface of the bottom portion 13. As shown in the bottom view of the valve seat member 6 in FIG. 2, the shaped flow passage 14 is composed of a circular groove portion a and a + -shaped groove portion b communicating with the circular groove portion a, and a through hole 15 is formed in the center of the groove portion b. Are in communication. The valve seat member 6 is fitted into the nozzle housing 2 so that the bottom portion 13 is flush with the lower end portion 7 of the nozzle housing 2, and the lower end portion 7 and the bottom portion 13 are joined together. Attach so that it faces the inside. The recess-shaped channel 14 may be formed by sandblasting or graining. Further, if the planar area of the recesses of preferably 1.5 to 5 mm ² gas lighter recess depth 3 mm ^2, for example 0.1
mm.

The microporous thin film 7 provided under the nozzle housing 2 and the valve seat 6 is formed by uniformly arranging fine pores of about 0.1 μm on the entire surface and cut into a predetermined size. 7 is applied to the lower end portion 7 of the nozzle housing 2, and the peripheral edge thereof is fixed by any existing fixing means such as heat fusion, ultrasonic welding, impulse welding, or an adhesive.

As described above, when the gas flow rate is adjusted by the flow rate limiting device according to this embodiment, the microporous thin film 7 is brought into close contact with the bottom portion 13 of the valve seat member 6 due to the gas pressure of the fuel in the container 1. The microporous thin film 7 corresponding to the portions other than the concave-shaped flow path 14 in 13 is impermeable to gas. Therefore, the gas-permeable microporous thin film 7 is formed in the recess-shaped channel 14
The gas flow rate is determined only by the porosity of the microporous thin film 7 and the plane area of the concave channel 14, and the microporous thin film 7, the circular groove a and the groove portion of the concave channel 14 are determined. The gas whose flow rate has been limited after passing through the page (5) is discharged from the through hole 3 of the nozzle 5 via the valve body 4 and ignited by the ignition means.

Next, another embodiment of the present invention will be described with reference to FIG. 3. The flow rate restricting device according to this embodiment shows that a stay member 16 made of a separate material is attached to the lower portion of the valve seat member.
Nozzle housing 2 fitted in the opening of fuel container 1a
The nozzle 5a and the spring 12a are installed in a, the valve seat member 6a is fitted in the lower part, and the ring-shaped stay member 16 is fitted in the lower part of the valve seat member 6a. The portion 17 and the bottom portion 13a of the valve seat member 6a are aligned flush with each other to face the inside of the container 1a, and the microporous thin film 7a is fixed to the lower end portion 17 of the stay member 16.
Further, the bottom portion 13a is provided with a recess-shaped channel similar to that of the above-mentioned embodiment.
14a is formed. The stay member 16 is made of polypropylene and is attached to the microporous thin film 7.
a is heat-fused by hot pressing or the like, and the microporous thin film 7a is brought into close contact with the bottom portion 13a of the valve seat member 6a by the gas pressure of the fuel in the container 1a. At that time, the microporous thin film 7a corresponding to the portion other than the recessed channel 14a in the bottom portion 13a
Is impermeable to gas. Therefore, the gas-permeable microporous thin film 7a is the microporous thin film 7a only in the recessed channel 14a.
The gas flow rate is determined by the porosity characteristic of a and the plane area of the concave flow path 14a.

Further, another embodiment will be described with reference to FIG. 4. In the flow rate restricting device according to this embodiment, a lid 18 fitted to the opening of the container 1b has a microporous thin film 7b fixed thereto. As shown, the nozzle housing 2b is fitted to the middle of the opening of the lid body 18, and the seat member 6b is fitted to the lower part of the lid housing 18 so that the lid bottom 19 and the bottom portion 13b of the valve seat member 6b are flush with each other in the container 1b. However, at this time, the peripheral edge of the microporous thin film 7b is fixed to the lid bottom 19. The bottom portion 13b of the valve seat member 6b is provided with the recess-shaped flow passage 14b similar to that of the above-mentioned embodiment, and exhibits the same operation.

Next, another embodiment of the present invention will be described with reference to FIG. 5. In the flow rate restricting device according to this embodiment, the lower end of the nozzle housing 2c and the upper end of the valve seat member 6c are butted to each other (6). In this state, the valve seat member 6c is fitted into the opening of the container 1c.
It shows the microporous thin film 7c fixed to the bottom 13c of the nozzle housing 2c, the nozzle 5c and the spring 12c are provided inside the nozzle housing 2c and the valve seat member 6c, and the bottom of the valve seat member 6c. The peripheral edge of the microporous thin film 7c is fixed to 13c. The microchannel thin film 7c is provided with a concave channel 14c and the microporous thin film is applied to the concave channel 14c to form a hot melt layer on the bottom in advance. 7c is fixed by heat fusion or adhesion. In use, the microporous thin film 7c is brought into close contact with the bottom portion 13c of the valve seat member 6c by the gas pressure of the fuel in the container 1c, as in the above embodiment. Then the bottom 13
The microporous thin film 7c other than the concave-shaped channel 14c in c does not allow gas to permeate. Therefore, in the gas-permeable microporous thin film 7c, the flow rate of the gas is determined only by the concave channel 14c and the porosity of the microporous thin film 7c and the plane area of the concave channel 14c.

In the present invention, as shown in FIGS. 6 and 7, a large recess 20 having a through hole is provided in the bottom portion 13d of the valve seat member 6d,
In some cases, the microporous thin film 7d is fixed to the bottom portion 13d in correspondence with the inverted T-shaped plug member 21. At this time, as shown in FIG. And a large recess 20 and a plug member as shown in FIG.
There is also a case where a concave-shaped flow path 14d is formed by providing a gap between the concave-shaped flow path 14d and the groove 21.

[0017]

As described above, the liquefied petroleum gas flow rate limiting device according to the present invention is used in a discharge gas flow rate limiting device provided in a container containing a mixed fuel of butane, isobutane, propane or other liquefied hydrocarbons. , A microporous thin film is provided in a substantially planar manner on the surface side of the member that constitutes the same flow rate limiting device and has a recess-shaped flow path, the surface side corresponding to the inside of the container by the internal gas pressure. The microporous thin film is a member that constitutes the flow rate limiting device,
That is, it is adhered to a valve seat member or a nozzle housing, etc., and is further brought into close contact with the end surface of a valve seat member having a recess-shaped flow path by gas pressure to secure an effective gas permeation area in the inner peripheral portion thereof, thereby providing a fine porosity. There is no stepped portion or empty space where liquid liquefied petroleum gas or the like is likely to accumulate on the gas supply side of the thin film liquefied petroleum gas or the like. In addition, it becomes possible to provide a flow rate limiting device that obtains a more stable gas flow rate according to page (7). In addition, since the effective area is ensured in the plane area of the recess-shaped channel and the recess-shaped channel is provided inside the closely contacting portion that does not allow gas to permeate, the microporous thin film may be fixed to a certain extent rough, and in that case as well. There is a unique effect that the effective area can be set accurately. Further, the conventional net-like bodies such as non-woven fabrics and the stay members for holding them are unnecessary, so that the number of parts and the assembling cost can be reduced. Further, the present invention has a peculiar effect that it is possible to provide a flow rate limiting device that is easy to manufacture and has stable product performance because the processing and assembly of each component can be performed by the existing technology.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing an embodiment of a flow rate limiting device for liquefied petroleum gas or the like according to the present invention.

FIG. 2 is a bottom view of the valve seat member in the embodiment.

FIG. 3 is an enlarged sectional view showing another embodiment of the present invention.

FIG. 4 is an enlarged sectional view showing another embodiment of the present invention.

FIG. 5 is an enlarged sectional view showing another embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of a main part showing another embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a main part showing another embodiment of the present invention.

[Explanation of symbols]

 1 Container 2 Nozzle Housing 3 Through Hole Page (8) 4 Valve Body 5 Nozzle 6 Valve Seat Member 7 Microporous Thin Film 14 Recessed Channel

Claims (1)

[Claims] 1. A flow restricting device for a discharged gas, which is provided in a container containing a mixed fuel of butane, isobutane, propane or other liquefied hydrocarbons, the container being a member that constitutes the same flow restricting device and has a concave flow path. A device for limiting the flow rate of liquefied petroleum gas or the like, characterized in that a microporous thin film is provided in a substantially flush manner on the surface side corresponding to the inside, and the film surface is always brought into close contact with the surface side by the internal gas pressure. ..