JPH05231637A - Flow rate-regulating device for gaseous fluid - Google Patents

Abstract

PURPOSE:To finely regulate a very small amount of gas flow rate by a method wherein a gas-permeable sheet is combined with a gas-impermeable sheet and the clearance between these sheets and a valve seat surface is made variable. CONSTITUTION:A gas-impermeable sheet 4 and a gas-permeable sheet 5, which are floated by gas pressure, are stacked and arranged between flat surfaces contacted-and separated relatively, and are spread in parallel with each other. One of the flat surfaces, which is opposed to the gas-impermeable sheet 4, is used as a valve seat surface 7 and a clearance (l) between the gas- impermeable sheet 4 and the valve seat surface 7 is made variable. The valve seat surface 7 communicates on the side of gas inflow and the gas-permeable sheet 5 communicates on the side of gas outflow. An adjusting member 6 for contacting-and-separating both the gas-impermeable sheet 4 and the gas- permeable sheet 5 against the valve seat surface 7 is handled at the outside of a main body casing 1, the gas-impermeable sheet 4 and the gas-permeable sheet 5 are allowed to shift, the clearance (l) between these sheets and the valve seat surface 7 is adjusted, and thus the amount of a gas is regulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control device for a gas fluid, particularly a gas fluid that is used as a fuel by igniting, and more specifically, a flow rate of a gas fluid for adjusting a minute flow rate with good operability. Regarding the adjusting device.

[0002]

2. Description of the Related Art Conventionally, various burning appliances such as household gas appliances, cigarette lighters, portable stoves, incense burners, etc. have a flow rate adjusting means inserted in the middle of a flow path leading to a burner nozzle.
A desired flame length is formed in the burner nozzle by adjusting the flow rate of the gas fluid.

As a gas fluid flow rate adjusting means used in such a combustion appliance, for example, a closing cock and a needle valve are generally used in household gas appliances, and urethane is used in a cigarette lighter for smoking. A porous material such as foam is interposed in the gas passage, and the flow rate is adjusted by changing the compression ratio of the porous material.

However, the closing cock is usually used as a means for opening and closing the flow rate, and it is difficult to set the flow rate arbitrarily. Further, since the needle valve has a small handle operation angle between the minute flow rate and the maximum flow rate, and the flow rate greatly changes with a slight handle operation amount, it is difficult to finely increase or decrease the flow rate within the range of the minute flow rate. It was On the other hand, in the method of compressing the porous material, it is relatively easy to adjust the minute flow rate, but it is not possible to increase the maximum flow rate, and the elastic restoring force of the porous material decreases over time, resulting in an accurate flow rate. There is a drawback that adjustment becomes difficult.

[0005]

Since the needle valve adjusts the flow rate by the contact / separation of the conical valve body and the cylindrical valve seat, in other words, the contact / separation of the conical surface and the circumferential line, the needle valve is slightly different. The flow rate changes greatly depending on the opening. Therefore, it is conceivable that the valve body and the valve seat are brought into contact with and separated from each other on a flat surface having an area, but it is necessary to improve the processing accuracy of the flatness of the flat surface, which inevitably leads to an increase in cost and the gas fluid In the adjustment, the flow rate greatly changes due to a slight change in the opening, which is not suitable for finely adjusting a minute flow rate.

The present invention makes it possible to easily set a minute flow rate,
Moreover, the operation amount of the adjusting means can be made large in comparison with the change of the flow rate, and the minute flow rate can be finely increased or decreased, and a flow rate adjusting device with less change with time is provided.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the means adopted by the first invention is designed to float under the pressure of gas between flat surfaces extending in parallel with each other which are relatively in contact with and separated from each other. The gas-impermeable sheet and the gas-permeable sheet are arranged so as to overlap with each other, and one flat surface facing the gas-impermeable sheet is used as the valve seat surface so that the gap between the two can be increased or decreased, and the valve seat surface It is characterized in that it communicates with the inflow side and the gas permeable sheet communicates with the gas outflow side.

According to a second aspect of the present invention, in a main body casing having a flat valve seat surface, a flow rate adjusting member whose axial end surface facing the valve seat surface is a flat surface extending parallel to the valve seat surface is movable in the axial direction. A gas impermeable sheet and a gas permeable sheet that float under gas pressure between the valve seat surface and the flat surface of the flow rate adjusting member, and the valve seat surface communicates with the inlet of the main body casing. Then, a gas through hole having one end opened in the center of the flat surface is bored in the flow rate adjusting member, and the other end of the gas through hole is communicated with the outflow side of the main body casing so that the flow rate adjusting member can be moved forward and backward from the main body casing. It is characterized by being operable.

[0009]

[Operation] A gas impermeable sheet and a gas permeable sheet are arranged between parallel flat surfaces that are relatively close to and separated from each other, and the flat surface facing the gas impermeable sheet is used as a valve seat surface to form a gap between the two. By adjusting the size of (l), flow resistance is imparted to the gas fluid flowing through the gap (l), and further, when passing through the gas permeable sheet, flow resistance is imparted. The gas flow rate is adjusted by the flow resistance.

[0010]

According to the present invention, the gas flow rate is adjusted by the flow resistance in the gap between the gas impermeable sheet and the valve seat surface and the flow resistance of the gas permeable sheet. Therefore, a minute flow rate can be easily adjusted finely, and since there is no compression portion, there is no change in the adjustment value due to aging, and stable flow rate adjustment can be achieved over a long period of time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings. The flow rate adjusting device of the present invention is provided with a gas fluid inlet (2) and an outlet (3), and a main body casing (1) in which a fluid flow path connecting the two outlets is formed.
And a gas impermeable sheet (4) which is inserted into a fluid flow path in the main casing (1) and whose size can be adjusted, and which is gas impermeable and floats under gas pressure, and A gas permeable sheet (5) superposed on the gas impermeable sheet (4) and acting as a resistance to a gas fluid, and the gas impermeable sheet (4) and the gas permeable sheet (5) on the valve seat surface ( 7) is composed of an adjusting member (6) that is brought into contact with and separated from the main casing (1), and the gas impermeable sheet (4) and the gas permeable sheet (5) are operated. Move, valve seat surface
It is characterized in that the gas flow rate is adjusted by adjusting the size of the gap with (7).

The gas-impermeable sheet (4) is impermeable to the gas fluid, and when the gas fluid in the main body casing comes in, the gas-impermeable sheet (4) receives the gas pressure and floats so that the gap between the flow passages becomes small. Deviate in the direction of opening. For example, it is made of a thin plate-like sheet of rubber, Teflon, metal foil or the like. The gas-impermeable sheet (4) may be made of any material as long as it is gas-impermeable and can float by receiving gas pressure, and may be a rigid body or a flexible body. ..

The gas permeable sheet (5) disposed between the gas impermeable sheet (4) and the adjusting member (6) is made of a porous material such as non-woven fabric or paper, and is a gas fluid. Permeation can be performed while imparting a predetermined constant flow resistance. The gas permeable sheet (5) may be fixed to the adjusting member (6) or may be free. In the free state, when the gas impermeable sheet (4) floats under the gas pressure, it is made of a material that can float at the same time.

The gas fluid flowing into the main casing (1) from the inflow port (2) pressurizes the gas impermeable sheet (4),
The flow rate is adjusted to correspond to the size of the gap (l) between the gas impermeable sheet (4) and the valve seat surface (7), and the gas is discharged through the gas permeable sheet (5). It flows out from (3). The gap (1) is defined between one surface of the gas impermeable sheet (4) and the flat valve seat surface (7) of the main body casing (1) extending in parallel therewith, and has an area of 2 Flow resistance is imparted to the fluid flowing between the two parallel planes, and the flow rate is adjusted to correspond to the size of the gap (l).

By moving the adjusting member (6) forward and backward and moving the gas impermeable sheet (4) toward the inner wall of the main casing (1), the gas impermeable sheet (4) and the valve seat surface (7) are moved. )
The gap (l) between and can be adjusted.

The gas permeable sheet (5) is made of a sheet of porous material such as non-woven fabric, paper or cloth, and can give a predetermined flow-over resistance to the gas fluid passing therethrough. Moreover, the maximum flow rate can be regulated to a certain limit. The gas-permeable sheet (5) is used as a gas-impermeable sheet.
By combining with (4), it becomes possible to finely adjust the minute gas flow rate. When only the gas impermeable sheet (4) is used without using the gas permeable sheet (5), the flow rate is adjusted only by the size of the gap (l) between the surfaces. , The flow rate fluctuates in proportion to the fluctuation of the gap (l), and the flow rate may greatly change with a small valve opening. However, by combining the gas permeable sheet (5), the gas permeable sheet Since the gas flow rate is suppressed by the inherent flow resistance of (5), it becomes possible to make the fluctuation ratio of the gas flow rate smaller than the fluctuation ratio of the valve opening degree, and it is possible to finely adjust the minute flow rate. I can.

When the gas impermeable sheet (4) is made of an elastic sealing material such as rubber, the sheet (4) is brought into close contact with the valve seat surface (7) to close the inlet (2). Therefore, the flow rate adjusting device can also function as an opening / closing valve of the flow path.

1 to 3 show a specific example of a flow rate adjusting device to which the present invention is applied, in which a main body casing (1) has a cylindrical shape whose lower surface is closed, and a flat wall for closing the lower surface.
A gas inlet (2) is bored in the center of (8), and the gas inlet (2) is connected to a gas fluid supply source such as a fuel tank via a connecting means (9) such as a pipe. It Connection method
On-off valve means for opening and closing the flow path as needed during the course of (9) (1
0) is provided. The inner surface of the drawing wall (8) is formed as a valve seat surface (7) having a flat surface.

A cylindrical adjusting member (6) is screwed by a screw means (11) from the open end of the main body casing (1) so as to be movable back and forth in the axial direction. A turning knob (12) extending to the outside of the main body casing (1) is integrally provided on the outer end of the adjusting member (6), and the turning member (6) is turned by a finger to move the adjusting member (6). ) Moves forward and backward in the main casing (1) in the axial direction. A T-shaped gas passage hole (13) is bored in the inner end portion of the adjusting member (6), one end of which is opened in the center of the inner end surface and the other end of which is the adjusting member (6).
Of the main casing (1) and communicates with the outlet (3) of the main casing (1). In order to prevent gas from leaking from the gas passage hole outlet (14) that opens to the outer peripheral surface, packing (15) (16) is placed above and below it.
Is wrapped around. An appropriate burner nozzle is connected to the outlet (3).

Inner end surface of the adjusting member (6) formed on a flat surface
(17) faces the valve seat surface (7), and a gas impermeable sheet (4) and a gas permeable sheet (5) are arranged between both surfaces (7) and (17). By screwing the adjusting member (6) forward and backward with the knob (12), the gap (l) between the gas impermeable sheet (4) and the valve seat surface (7) which is in contact with the inner end surface of the adjusting member (6) can be set to an arbitrary size. Can be set to

When the opening / closing valve means (10) is opened to allow the gas to flow through, the gas impermeable sheet (4) and the gas permeable sheet (5) receive the gas pressure flowing from the inflow port (2). ) Is the adjustment member
Adhere to the flat inner end face (17) of (6) and set the gap (l)
Flow resistance is given to the gas fluid, and the flow rate of the gas corresponding to the applied flow resistance passes through the gap (l) to reach the gas permeable sheet (5), and The transparent sheet (5) penetrates and enters the gas passage hole (13) of the adjusting member (6).
Gas permeable sheet when passing through the gas permeable sheet (5)
The gas flow rate is suppressed by the inherent flow resistance of (5). Therefore, the adjustment value of the actual gas flow rate is
It becomes a value in which the adjustment value in (l) and the adjustment value by the gas permeable sheet are superposed, and finer flow rate adjustment is possible compared to only flow rate adjustment by increasing or decreasing the gap (l), and fine flow rate adjustment Can be achieved with better operability, and the maximum adjustment value can be regulated by the gas permeable sheet.

The gas that has passed through the gas permeable sheet (5) is
It is ignited from the outlet (3) through the gas passage (13) to the burner nozzle.

According to the flow rate adjusting device of the present invention, it is possible to finely adjust the flow rate of the gas fluid. Therefore, the flow rate of the gas lighter for cigarettes, the incense burner, the portable gas stove, etc., which uses such a flow rate of the gas fluid The optimum adjustment means can be provided. Especially in the incense burner, it is necessary to heat the fragrance tree at a relatively low temperature to diffuse the fragrance, and to finely adjust the temperature according to the type of incense, the surrounding atmosphere, temperature, humidity, etc. Moreover, the flow rate adjusting device of the present invention is optimal.

Further, according to the present invention, since there is no compression portion when adjusting the flow rate, the elasticity of the porous material decreases with time as in the conventional device for adjusting the flow rate by compressing the porous material. There is no risk that the flow rate adjustment value will change or flow rate adjustment will become difficult. Therefore, it is possible to adjust the gas flow rate stably over a long period of time. Furthermore, in the adjusting device using a porous substance, the adjusting function is not exhibited until the porous substance is made to fit the gas fluid after the adjusting device is assembled. There was an inconvenience that required days, but in this invention,
Since there is no portion that needs to be compatible with the gas fluid, there is an advantage that the flow rate adjustment can be started immediately after assembly.

FIG. 4 shows an example in which the flow rate adjusting device of the present invention is applied to a cigarette lighter. In the figure, (100) is a fuel tank of a cigarette lighter, but as is well known, butane gas, hydrocarbon fuel gas such as propane gas is pressurized and stored in a liquefied state, and is stored in the upper part of the tank (100). There is vaporized fuel gas. The flow rate adjusting device of the present invention is positioned in the region where the gas phase gas exists in order to adjust the flow rate of the fuel gas in the vaporized gas state. Reference numeral (110) is a fixed cylindrical body corresponding to the main body casing (1) shown in FIGS.
(0) is fixedly installed on the upper part and the gas inlet (112) is on the lower surface.
And the inner surface of the gas inlet (112) is a flat valve seat surface (11
Formed in 7). A movable cylinder (116) corresponding to the adjusting member (6) of FIGS. 1 to 3 is screwed so as to be movable back and forth in the axial direction from the upper open end of the fixed cylinder (110). Advancement,
It can be operated by an adjusting handle (122) fixed to the upper end. The lower end of the movable cylinder (116) is closed by a flat drawing wall (118) having a gas through hole (123) in the center, and the drawing wall (118) faces the valve seat surface (117). The gas impermeable sheet (114) and the gas permeable sheet (115) are arranged between the both in an overlapping manner as described above.

A burner nozzle (10) is provided in the movable cylinder (116).
1) is vertically movably inserted from above, and is constantly urged downward by the tension of a spring (103) stretched between it and a nut (102). A shutoff valve (104) made of an elastic sealing material such as rubber is fixed to the lower end of the burner nozzle (101), and closes the gas passage hole (123) by closely contacting it.
A nozzle hole (105) is bored in the burner nozzle (101) to let gas flow upward. An open / close lever member (106) is locked to the burner nozzle (101), and when the lever member (106) lifts the burner nozzle (101), the shutoff valve (104)
Is opened away from the gas passage hole (123), and the fuel gas whose flow rate has been adjusted flows out from the nozzle hole (105) and is ignited by a desired ignition means to form a flame for smoking. You can do it.

The adjustment handle (122) is rotated to move the movable cylinder (10
By moving (2) up and down, the gas impermeable sheet (11
The gas flow rate can be arbitrarily adjusted by adjusting the gap between 4) and the valve seat surface (117).

In the flow rate adjusting device of FIG. 4, since the inflow port (112) is directly opened in the fuel tank (100), when the lighter is swung or tumbled, the liquefaction in the tank is liquefied. Gas may enter directly through the inlet (112),
This makes it impossible to adjust the flow rate, so it is suitable for a lighter flow rate adjusting device such as a desktop lighter that is usually left stationary in a certain place for use.

In the above, FIG. 4 shows an example in which the flow rate adjusting device of the present invention is applied to a gas lighter, but it goes without saying that the present invention is not limited to such a gas lighter, and can be used for incense burners and portable devices. It is applicable to gas stoves, other domestic gas cocks, or flow rate adjustment of gas fluid not used as fuel.

[Brief description of drawings]

 Figure 1 External perspective view Figure 2 Exploded perspective view Figure 3 Sectional view Figure 4 Sectional view applied to gas lighter

[Explanation of symbols]

 (1) Main body casing (2) Inlet port (3) Outlet port (4) Gas impermeable sheet (5) Gas permeable sheet (6) Adjustment member (7) Valve seat surface (8) Image wall (9) Connection Means (10) On-off valve means (11) Screw means (12) Knob (13) Gas through hole (14) Gas through hole outlet (15) Packing (16) Packing (17) Inner end surface (100) Fuel tank (101) Burner nozzle (102) Nut (103) Spring (104) Stop valve (105) Nozzle hole (110) Fixed cylinder (112) Gas inlet (114) Gas impermeable sheet (115) Gas permeable sheet (116) Movable cylinder (117) Valve seat surface (118) Wall (122) Adjustment handle (123) Gas through hole

Claims (3)

[Claims] 1. A gas-impermeable sheet, wherein a gas-impermeable sheet and a gas-permeable sheet, which float under the pressure of gas, are superposed on each other between flat surfaces extending in parallel with each other and relatively facing each other. One flat surface facing the valve seat surface is used as a valve seat surface to increase or decrease the gap between the two, and the valve seat surface is connected to the gas inflow side.
A flow control device for a gas fluid, characterized in that a gas permeable sheet is connected to a gas outflow side. 2. A main body casing having a flat valve seat surface, and a flow rate adjusting member having an end surface facing the valve seat surface, which is a flat surface extending parallel to the valve seat surface, is axially movable forward and backward.
A gas impermeable sheet and a gas permeable sheet floating under gas pressure are provided between the valve seat surface and the flat surface of the flow rate adjusting member,
The valve seat surface is communicated with the inlet of the main body casing, and a gas through hole having one end opened at the center of the flat surface is bored in the flow rate adjusting member,
The other end of the gas passage is communicated with the outflow side of the main body casing,
A flow rate adjusting device for a gas fluid, wherein a flow rate adjusting member is operable to move back and forth from a main body casing. 3. The flow rate adjusting device according to claim 2, wherein the main body casing is attached to a fuel tank of a cigarette lighter, and a burner nozzle is connected to an outlet side of the main body casing.