JP3866705B2 - Fluid supply adjustment device - Google Patents

Description

  The present invention regulates the maximum flow rate in an apparatus for adjusting the supply amount of a fluid, for example, an ignition device such as a gas writer, a fuel gas combustion device such as a hair collar or an iron, or a medical liquid medicine drip device. Concerning structure.

  Conventionally, the structure of a gas supply amount adjusting device applied to an area-adjustable gas writer that adjusts the gas flow rate by changing the gas permeation area of a gas permeable filter, and the mechanism for adjusting the gas supply amount Has a gas passage hole penetrating the upper and lower surfaces arranged on the base having a gas passage communicating with the gas storage tank, and has a flat bottom surface and a top opening of the gas passage hole. A gas permeable filter is arranged on the upper part of the elastic sealing member whose inner bottom surface is recessed in a bowl shape, and moves up and down in conjunction with the rotation of the flow rate adjusting lever by knurling. The member is provided with a pressing member for changing a contact area between the elastic sealing member and the filter by applying a pressing force through the filter, and the gas flow rate is adjusted by changing the area by operating the lever. It has become an elephant. As a typical example of such a structure, there is a technique as shown in Japanese Patent No. 2503117.

  As described above, the adjustment of the gas supply amount in the gas supply amount adjusting device using such a structure changes the area where the elastic sealing member and the filter are in close contact with each other by the pressing force, thereby allowing the gas to pass through the filter, That is, the gas permeation area is adjusted to change the gas flow rate.

  Therefore, the gas flow rate becomes the maximum when the pressing force against the elastic sealing member is released, and the area where the elastic sealing member and the filter are in close contact with each other by applying the pressing force is maximized and the gas permeation area is minimized. At the minimum amount. In the case of the gas supply amount adjusting device having the above-described configuration described in Japanese Patent No. 2503117, sufficient consideration is given to the adjustment of the flame length as necessary.

  However, the release state of the pressing force that maximizes the gas flow rate is a boundary state whether or not the pressing member contacts the filter, and it is difficult to actually create such a state. Further, if the filter and the elastic sealing member are not pressed to some extent by the pressing member, the gas is not sealed, causing a gas leak. Therefore, in actuality, it is necessary to make the filter and the elastic sealing member slightly pressed. However, in mass production, this pressing state varies, so that the pressing force is released and the gas flow rate is constant and maximum. It is extremely difficult to manufacture such a state for each product. In particular, when the lever is adjusted to be set to the maximum flow rate in the assembled state, the positional relationship among the filter, the elastic sealing member, the pressing member, and the like cannot be visually confirmed, which becomes more difficult. That is, there is a problem that the stability of the maximum gas flow rate cannot be ensured because the pressing state is slightly different for each product.

For this reason, when using a combustion flame directly like a gas writer, it becomes difficult to prescribe | regulate the maximum flame length uniformly.
Japanese Patent No. 2503117

  The present invention has been made in view of the above problems, and can adjust the supply amount of the fluid as necessary, and can stabilize the maximum flow rate of the fluid at a predetermined amount. It is an object of the present invention to provide a fluid supply amount adjusting device having a specified structure of the maximum flow rate that can be obtained.

  In order to solve the above-mentioned problems, the invention adopts a substantially plate-like elastic sealing member disposed on a base having a flow passage communicating with a fluid storage tank, and presses and compresses the elastic sealing member. A pressing member capable of being fluidized, and a fluid-permeable filter interposed between the pressing member and the elastic sealing member, the elastic sealing member having a flow hole communicating with the flow passage of the base, A recessed portion that is communicated with the flow hole and recessed in a concave shape is formed, and when the pressing member is pressed and compressed, the open area of the downstream opening in the recessed portion is changed to adjust the gas flow rate passing through the filter. In the gas supply amount adjusting device, the concave portion of the elastic sealing member is formed with an inner bottom surface which is inclined so as to become gradually wider toward the downstream side, and the inner peripheral wall is substantially with respect to the arrangement surface of the elastic sealing member. Vertically formed, front When pressing the elastic sealing member through the filter with the pressing member, the maximum gas flow rate is kept constant without changing the open area of the recessed portion until the peripheral wall of the recessed portion is crushed. Features.

  The peripheral wall surface of the recessed portion is formed perpendicular to the arrangement surface of the elastic sealing member.

  The peripheral wall surface of the recessed portion is formed as a tapered surface that gradually expands from the inner bottom surface toward the opening.

  The inner bottom surface of the recessed portion is an inclined surface formed of a linear inclined line as viewed in a cross section cut in the thickness direction.

  It is characterized in that the inner bottom surface of the recessed portion is an inclined surface composed of a curved inclined line as viewed in a cross section cut in the thickness direction.

  The elastic sealing member and the filter disposed on the pressing surface are integrated by welding.

  The elastic sealing member is characterized by having a positioning welding projection for welding the elastic sealing member and the filter to the pressing surface while defining a position where the filter is disposed.

  The filter is characterized by comprising a microporous film having micropores having a maximum pore diameter of about 0.02 μm to 0.4 μm and having a porosity of about 38% to 45% and uniformly over almost the entire surface.

  The respective surfaces forming the joining surfaces of the elastic sealing member and the pressing member joined through the filter are substantially the same in both area and shape.

  A stepped fluid permeation diameter portion in which the inner diameter at a position where the pressing member faces slightly upward from the pressing surface that presses the elastic sealing member is further smaller than the inner diameter of the pressing surface. It is characterized by comprising.

  In the fluid supply amount adjusting device having the maximum flow rate regulating structure according to the present invention, each component of the fluid supply amount adjusting device may be exactly the same as the conventional one except for the elastic sealing member. The manufacturing process can be manufactured without changing from the conventional one (when applied to a gas writer, etc.). Therefore, the flow including not only the gas but also the liquid in the fluid supply amount adjusting device without increasing the manufacturing cost. It is possible to provide a product that can regulate the maximum flow rate while allowing the body supply to be freely adjusted, and thus can perform fluid supply with high stability.

  For example, if the fluid supply amount adjusting device of the present invention is used for a gas writer, a highly safe gas writer with a maximum flame length defined to a certain size can be provided without causing an increase in cost.

  A preferred embodiment of the present invention will be described in detail below. Referring to FIG. 1, the structure of an elastic sealing member (1a) to which the present invention is applied is shown. A plate-shaped elastic sealing member (1a) having a circular planar shape made of PP elastomer and having a thickness H has a small-diameter circular circulation hole (2) penetrating up and down the elastic sealing member (1a). A flat arrangement surface (3) is formed at the lower end of the elastic sealing member (1a), and when pressed, it is in close contact with the arrangement surface (4) (see FIG. 5) to seal the fluid. On the upper surface of the elastic sealing member (1a), the peripheral edge formed on the upper surface of the elastic sealing member (1a) is left substantially in the shape of a circle, and the inside thereof is dropped to be substantially perpendicular to the flat lower surface ( 5a) and an inner bottom surface (7a) which is continuous with the inner lower end of the peripheral wall (5a) and is recessed in a bowl shape toward the flow hole (2).

  In addition, on the top surface of the upper edge of the elastic sealing member (1a) left in the circumferential shape, a positioning welding projection (8) that protrudes along the circumference is provided at substantially the center of the width of the edge. (See FIG. 1b) to facilitate disposition of the fluid permeable filter (9) with respect to the top surface, and by applying ultrasonic welding treatment, the elastic sealing member (1a) and the fluid permeable filter ( 9) can be fixed. This positioning weld protrusion (8) is not necessarily provided, but as described above, the positioning weld protrusion (8) is provided and the elastic sealing member (1a) and the fluid permeable filter (9) are provided in advance. As a result, it is possible to improve the efficiency of the assembly work. This is because when the elastic sealing member (1a) and the fluid permeable filter (9) are assembled separately without being integrated, the filter (9) itself is very thin and static electricity is generated. This is because the assembly work of (9) has become difficult and an additional assembly process is required. However, the protrusion (8) defines the position when the fluid permeable filter (9) is disposed on the top surface of the elastic sealing member (1a), and conventionally known ultrasonic welding or impulse after the placement. It is sufficient that the filter (9) can be fixed to the top surface of the elastic sealing member (1a) by welding or other treatment, and it is not always necessary to have the annular protrusion (8) along the periphery of the top surface. Further, it may be a local convex shape raised at an appropriate position on the circumference with an appropriate interval.

  Even if the pressing member (10) is moved up and down by a width Δ within a range corresponding to the minute height δ of the peripheral wall (5a), that is, δ ≧ Δ (see FIG. 9), the elastic sealing member (1a) And the area in close contact with the fluid permeable filter (9) disposed on the elastic sealing member (1a) is kept substantially constant, so that the fluid permeable area is almost unchanged and the amount of fluid supplied is The maximum flow rate is defined almost constant.

  The structure of the elastic sealing member (1a) to which the present invention is configured as described above is more in comparison with the structure of the conventional elastic sealing member (11) having a height h 'shown in FIG. There is almost no change except for the peripheral wall (5a) that looks like that added to the sealing member (11), but the amount of fluid supply is relatively large due to subtle changes in the pressing state. Therefore, the peripheral wall (5a) like the said invention has a big meaning. The basic state of the fluid supply amount adjusting device is that the elastic sealing member is always subjected to a slight pressing force in order to prevent the fluid from leaking. It is very difficult to make the pressing force constant. For this reason, when the conventional elastic sealing member (11) as shown in FIG. 2 is used, the contact area between the inner bottom surface (7b) and the filter is slightly different for each product, and the amount of fluid supplied is greatly different. As a result, the maximum flow rate cannot be defined and stability is lacking.

  On the other hand, in the fluid supply amount adjusting device using the elastic sealing member (1a) to which the present invention is applied, the peripheral wall is obtained by applying a pressing force from the state shown in FIG. Until (5a) is crushed and the height δ is eliminated (see FIG. 9b), and until it has substantially the same shape as the conventional elastic sealing member (11) in the state where the pressing force shown in FIG. 2 is not applied, The contact area between the elastic sealing member (1a) and the fluid permeable filter (9) hardly changes. Accordingly, since the fluid permeation area is kept substantially constant during this time, the supply amount of the fluid is also kept constant.

  Since the tight contact area between the elastic sealing member (1a) and the fluid permeable film (9) is minimized when the pressing force applied to the elastic sealing member (1a) is minimum, the fluid supply amount adjusting device In this case, this state is the maximum flow rate. In other words, the difference in the pressing state of the elastic sealing member (1a), which differs slightly depending on the product, is absorbed and relaxed by the peripheral wall (5a) of the minute height δ formed almost vertically, and within the range of the height δ. Since the permeation area of the fluid hardly changes and the maximum flow rate is kept constant, the stability of the maximum flow rate in the fluid supply amount adjusting device can be improved.

  Hereinafter, modifications and embodiments of the present invention will be described with reference to the drawings. In FIG. 3, the peripheral wall (5b) is formed such that the cross-sectional width W is maximum at the base, the cross-sectional width gradually narrows upward, and the minimum cross-sectional width W ′ is at the upper end of the peripheral wall (5b). The inclined line (12c) descending toward the flow hole (2) in the cross section that cuts the elastic sealing member (1b) up and down is an inner bottom surface (7c) composed of a straight line. It is a flow rate regulation structure. Thus, by forming the peripheral wall (5b) with its cross-sectional width narrowing upward, the peripheral wall (5b) is pressed by the pressing member and is somewhat crushed and is spread in the horizontal direction. However, if it is within the range of the minute height δ of the peripheral wall (5b), the permeation area of the fluid is kept more constant than in the case of the peripheral wall (5a) formed vertically like the elastic sealing member (1a). It can be done. However, even if the peripheral wall looks like the pressure member moves up and down within the range of the height δ and the peripheral wall is crushed, the cross-sectional shape of the peripheral wall is formed so that the fluid permeation area of the filter at that time hardly changes. What is necessary is just to be able to do, and the cross-sectional shape of a surrounding wall or an elastic sealing member is not limited at all.

  The example of the elastic sealing member (1c) to which the present invention shown in FIG. 4 is applied has a larger width W〃 of the annular top surface at the upper end of the elastic sealing member (1c) than that of Example 1, and The elastic sealing member (1c) is formed with a small diameter, and the permeation area of the fluid is relatively small as in this example, and the fluid permeable filter (9) disposed on the top surface is desired. A porous film selected so as to obtain a permeation amount of preferably about 25 μm having a pore having a maximum pore size of about 0.02 μm to 0.2 μm with a porosity of about 38% and almost uniformly over the entire surface. When the fluid is a liquid, for example, it can be suitably used as a flow rate adjusting mechanism in a medical drip device.

  With reference to FIGS. 5 to 10, an example of a gas writer using a gas supply amount adjusting device incorporating an elastic sealing member (1) to which the present invention is applied will be described, and an embodiment of the present invention will be described. That is, the fluid in this example is a combustion gas. The elastic sealing member (1) to which the present invention is applied in this example includes a base (14) having a gas passage (13a) communicating with a gas storage tank, as shown in FIG. The gas writer of this example is incorporated in a gas supply amount adjusting device comprising a pressing member (10) having a gas passage (13b) communicating with the supply port (15) and a gas permeable filter (9). A supply amount adjusting device, a combustion nozzle (16), and a flow rate adjusting means are provided.

  The flow rate adjusting means is configured to be interlocked with the pressing member (10) by knurling, and the pressing member is interlocked with the rotation of the flow rate adjusting lever (17) arranged to be rotatable within a predetermined angle range. (10) is moved up and down, and a pressing force is applied to the elastic sealing member (1) formed with a recessed portion expanding toward the downstream via the filter (9), and the elastic sealing member (1) and The area in close contact with the filter (9) can be changed, thereby adjusting the gas flow rate. However, the opening of the recessed portion does not necessarily have to be directed downstream as in this example, and is not limited as long as the gas permeation area can be changed depending on the pressed state.

  Here, the filter (9) employed in this example is a microporous film having micropores having a maximum pore diameter of about 0.04 μm to 0.4 μm and having a porosity of about 45% and uniformly over almost the entire surface. Become.

  Depending on the rotation angle of the flow rate adjusting lever (17), the pressing state of the elastic sealing member (1) changes, and the gas supply amount in that state also changes accordingly, so that the flame length can be adjusted. When the flow rate adjusting lever (17) is rotated counterclockwise, the pressing force applied to the elastic sealing member (1) is smaller than that before the flow rate adjusting lever (17) is rotated. Accordingly, the contact area between the elastic sealing member (1) and the filter (9) is also reduced, the gas transmission area is increased, the gas supply amount is also increased, and the gas supply port (15) of the combustion nozzle (16) is increased. The length of the flame emitted from) increases. Conversely, when the flow rate adjustment lever (17) is rotated clockwise, the gas permeation area is smaller than before rotation, so the amount of gas supply is also reduced, and the gas supply port of the combustion nozzle (16) ( The length of the flame emitted from 14) becomes smaller.

  Further, the flame length is relatively different even if the position of the flow rate adjusting lever (17) is slightly different. Therefore, during assembly in manufacturing, the knurled groove (18) provided in the flow rate adjusting lever (17) and the rotational movement in the plane in which the lever (17) rotates are converted into vertical movement in the vertical direction. Therefore, when the knurled groove (21) provided in the converter (20) screwed into the helical groove (19) provided in the base (14) is knurled, even if the fitting position is slightly shifted. If it does not fit well, there will be a gap of about one knurled groove, and as a result, the maximum flame length will be greatly different. For this reason, in the case of the gas supply amount adjusting device using the conventional elastic sealing member (11), the maximum flow rate differs depending on the product and the flame length is unstable. However, as shown in FIG. In the case of the gas supply amount adjusting apparatus incorporating the elastic sealing member (1) to which the invention is applied, the peripheral wall (5) formed substantially perpendicular to the flat lower surface is removed from the state of the elastic sealing member (1) shown in FIG. 9a. Until the elastic sealing member (1) shown in FIG. 9b is pressed until the pressing force is applied, the close contact area between the elastic sealing member (1) and the filter (9) hardly changes, and the gas permeation area Therefore, the gas supply amount is regulated to be constant and the maximum supply amount is stabilized. However, the elastic sealing member and the pressing member shown in FIG. 9 are slightly different in shape from those of Example 3, and the area of the pressing surface of the pressing member is larger than the area of the top surface of the elastic sealing member. Since the contact area between the surface and the upper surface of the filter is constant, it is relatively difficult to adjust the gas transmission area.

  On the other hand, in the case of Example 3, the surfaces of both members forming the joining surface of the elastic sealing member (1) and the pressing member (10) joined through the filter (9) have an area and Both of the shapes are formed substantially equal to each other, and the inner diameter of the pressing member (10) at a position slightly upward from the joining surface is formed to be a step smaller than the inner diameter of the joining surface. In addition, the elastic sealing member (10) has a stepped fluid permeation diameter portion (22), and can ensure a stable and smooth fluidity even when the elastic sealing member (10) is crushed and pushed in the radial direction during pressing. It is configured.

The longitudinal cross-sectional view which shows the structure of the elastic sealing member to which this invention is applied A longitudinal sectional view showing the structure of a conventional elastic sealing member A longitudinal sectional view showing a modification of the present invention A longitudinal sectional view showing a modification of the present invention Sectional drawing which shows the structure of the gas writer comprised using the adjustment apparatus of the gas supply amount incorporating the elastic sealing member to which this invention is applied Part drawing showing the structure of a flow control lever with knurled grooves Part drawing showing the structure of the converter with knurled grooves The perspective view which shows the state of the knurling fitting in the gas writer of this example The longitudinal cross-sectional view which shows the state in which the gas flow volume is substantially equal in the elastic sealing member to which this invention is applied Sectional drawing which shows the state by which the press member was mounted on the elastic sealing member which has arrange | positioned the filter concerning this example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elastic sealing member 2 Flow hole 3 Arrangement surface 4 Arrangement surface 5 Peripheral wall 6 Opening 7 Inner bottom surface 8 Positioning welding protrusion 9 Filter 10 Press member 11 Conventional elastic sealing member 12 Inclined line 13 Gas passage 14 Base 15 Gas supply port 16 Combustion nozzle 17 Flow rate adjusting lever 18 Knurled groove 19 Spiral groove 20 Converter 21 Knurled groove 22 Stepped fluid permeation diameter portion

Claims (10)

A substantially plate-like elastic sealing member disposed on a base having a flow passage communicating with the fluid storage tank, a pressing member capable of pressing and compressing the elastic sealing member, and the pressing member and the elastic sealing member A fluid permeability filter interposed therebetween, and the elastic sealing member is formed with a flow hole communicating with the flow passage of the base and a recessed portion recessed in a concave shape communicating with the flow hole. In the fluid supply amount adjusting apparatus, when the pressure member is pressed and compressed, the flow area of the fluid passing through the filter is adjusted by changing the open area of the downstream opening in the recessed portion. The concave portion of the sealing member has an inner bottom surface that is inclined so as to gradually widen toward the downstream side, and an inner peripheral wall is formed substantially perpendicular to the arrangement surface of the elastic sealing member. Elastic sealing member through Pressure time, until the peripheral wall of the recessed portion is collapsed, the supply amount adjusting apparatus of the fluid to the maximum flow rate without changing the open area of the recessed portion, characterized in that it has to be kept constant amount. The adjusting device according to claim 1, wherein the peripheral wall surface of the recessed portion is formed perpendicular to the arrangement surface of the elastic sealing member. The adjusting device according to claim 1, wherein the peripheral wall surface of the recessed portion is formed in a tapered surface that gradually expands from the inner bottom surface toward the opening. The adjusting device according to any one of claims 1 to 3, wherein the inner bottom surface of the recessed portion is an inclined surface including a linear inclined line as viewed in a cross section cut in the thickness direction. The adjusting device according to any one of claims 1 to 3, wherein the inner bottom surface of the recessed portion is an inclined surface formed of a curved inclined line as viewed in a cross section cut in the thickness direction. 6. The adjusting device according to claim 1, wherein the elastic sealing member and the filter disposed on the pressing surface are integrated by welding. The elastic sealing member has positioning welding projections for welding the elastic sealing member and the filter to the pressing surface while defining a position where the filter is disposed. Adjustment device. 8. The filter is made of a microporous film having fine pores having a maximum pore size of about 0.02 μm to 0.4 μm and having a porosity of about 38% to 45% and uniformly over almost the entire surface. The adjustment device described in 1. 9. The adjusting device according to claim 1, wherein the surfaces forming the joining surfaces of the elastic sealing member and the pressing member joined through the filter are substantially equal in both area and shape. A stepped fluid permeation diameter portion in which the inner diameter at a position where the pressing member faces slightly upward from the pressing surface that presses the elastic sealing member is further smaller than the inner diameter of the pressing surface. The adjustment device according to claim 1, comprising:

Images