JP4142805B2 - Flow control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flow rate adjusting device that is used by being attached to a water pipe or the like, and more particularly to a flow rate adjusting device that automatically adjusts a flow rate according to a water supply pressure when saving water.
[0002]
[Prior art]
Countermeasures against water shortages and drought have become major issues in recent years. When water shortages occur, it is necessary to save water. Generally, water consumption is forcibly reduced by lowering the water supply pressure to each household.
[0003]
[Problems to be solved by the invention]
The subject of this invention pays attention to the fluctuation | variation of feed water pressure, and there exists in proposing the flow volume adjusting device which can adjust a flow volume automatically using the fluctuation | variation of this feed water pressure.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the flow rate adjusting device of the present invention includes a fluid passage, expansion / contraction means that expands / contracts according to the pressure of the fluid flowing through the fluid passage, and the fluid in conjunction with expansion / contraction of the expansion / contraction means. It has the on-off valve which increases / decreases the fluid passage cross-sectional area of a passage.
[0005]
Here, in the present invention, an annular tube is used as the means for functioning as the expansion / contraction means and the on-off valve. The annular tube is formed of a flexible or stretchable material, and the internal pressure is maintained at a predetermined value. The outer peripheral surface portion of the annular tube is fixed to the inner peripheral surface of the fluid passage in a sealed state, and the fluid passage cross-sectional area increases or decreases according to the increase or decrease of the inner diameter dimension of the annular tube.
[0006]
In the present invention, as the on-off valve, a valve body having one end attached so as to be rotatable over a predetermined angle range with respect to the inner surface of the fluid passage is used. In this case, as the expansion / contraction means, a bellows-like expansion / contraction cylinder that is arranged in the fluid passage and is connected to the inner surface of the fluid passage and the valve body, respectively, is used. The internal pressure is kept at a constant value. In this configuration, the fluid passage cross-sectional area increases or decreases as the valve body rotates according to the expansion and contraction of the expansion and contraction cylinder.
[0007]
Next, in the present invention, the on-off valve is not a single member but can be composed of a plurality of valve bodies. In this case, expansion / contraction means for moving each of the valve bodies can also be provided for each valve body.
[0008]
On the other hand, in the present invention, restricting means for restricting the upper limit or lower limit of the moving range of the expansion / contraction means or the on-off valve may be arranged to restrict the maximum value or the minimum plate of the on-off valve opening.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Below, with reference to drawings, the example of the flow volume adjusting device to which this invention is applied is demonstrated.
[0010]
(First embodiment)
FIG. 1 is an explanatory view showing a water-saving device according to the first embodiment of the present invention. The water-saving device 1 of this example is disposed inside a water pipe 2 and includes an annular tube 3 that can expand and contract. The tube 3 is, for example, an airtight one formed from a material having flexibility and stretchability, like a rubber tire or the like. Moreover, in the state where the normal water supply pressure is acting in the water pipe, as shown in FIGS. 1 (a) and 1 (b), the tube internal pressure is maintained so that the inner diameter dimension thereof is maintained in an annular shape of d1. Is set. Furthermore, the outer part of the outer peripheral surface of the tube 3 is fixed to the inner peripheral surface 2a of the water pipe 2 in a liquid-tight state over the entire periphery.
[0011]
In the water-saving device 1 having this configuration, water flows through the circular opening portion 4 (inner diameter dimension d1) of the tube 3 in a normal water supply pressure state.
[0012]
When the water supply pressure decreases during water saving or the like, the tube 3 expands until the internal pressure of the tube 3 becomes equal to the reduced water supply pressure. Here, since the outer portion of the outer peripheral surface of the tube 3 is fixed to the inner surface 2a of the water pipe, the tube 3 expands sideward and inward and is in the state shown in FIGS. 1 (c) and 1 (d). That is, the inner diameter is d2 smaller than d1.
[0013]
As a result, since the cross-sectional area of the circular opening portion 4 of the tube 3 is reduced, the amount of water supply is automatically reduced.
[0014]
Thus, according to the water-saving device 1 of this example, the circular opening portion 4 that is the flowing water passage portion automatically increases or decreases in conjunction with the fluctuation of the internal pressure (water supply pressure) of the water supply pipe 1. Therefore, if such a water-saving device 1 is attached to the water pipe, it is convenient because it is possible to automatically reduce the amount of water consumed when saving water. In addition, when water saving is released, the water supply pressure increases, thereby increasing the flowing water passage cross-sectional area, which is convenient because it automatically returns to the normal water supply state even when water shortage is resolved.
[0015]
(Second embodiment)
FIG. 2 is an explanatory view showing a water-saving device according to the second embodiment of the present invention. As shown in this figure, a water-saving device 11 of this example includes a valve body 14 that is rotatable about a rotating shaft 13 supported on an inner surface 12a of a water pipe 12 and a bellows-like telescopic cylinder 15. And have.
[0016]
The valve body 14 is rotatable between a state orthogonal to the tube shaft 11a and a state parallel to the tube shaft 11a (about 90 degrees). The expansion / contraction cylinder 15 is a bellows-type expansion / contraction cylinder made of a flexible and airtight material, and both ends thereof are fixed in an airtight state to the attachment portion 16 formed on the water pipe inner surface 12a and the surface 14a of the valve body 14, respectively. ing. The telescopic cylinder 15 is filled with gas so as to have a constant internal pressure.
[0017]
In the water-saving device 11 having this configuration, in a normal water supply state, the telescopic cylinder 15 is contracted, and the valve body 14 is at a position 14A indicated by an imaginary line in FIG. In this state, when the water supply pressure decreases, the telescopic cylinder 15 extends and reaches the position indicated by the solid line in FIG. As a result, the running water passage cross-sectional area is automatically reduced, and the amount of water supply is automatically reduced. When the water supply pressure returns to the normal pressure, the valve body 14 rotates again to the position indicated by the position 14A, and the water supply amount automatically increases.
[0018]
Also with the water-saving device 11 of this example, the same effect as the water-saving device using the tube according to the first embodiment can be obtained.
[0019]
(Third embodiment)
FIG. 3 shows a water-saving device according to a third embodiment of the present invention. In the water-saving device 21 of this example, a rectangular cylindrical portion 23 of a part of the water pipe 22 is formed, and an on-off valve 26 including a pair of upper and lower valve bodies 24 and 25 is disposed therein. The valve bodies 24 and 25 are attached so as to be movable by a fixed distance in a direction away from the position shown in FIG. Cylindrical diaphragms 27 and 28 that can be expanded and contracted in the vertical direction in the figure are attached to the respective valve bodies 24. The diaphragms 27 and 28 are in an airtight state in which the internal pressure is set to a predetermined value, and the water supply pressure acts directly on the outer peripheral surfaces thereof.
[0020]
In the state of normal water supply pressure, the inner side surfaces 24a and 25a of both valve bodies 24 and 25 are in positions retreated from the water pipe inner peripheral surface 22a having a circular cross section. When the water supply pressure decreases during water saving, the diaphragms 27 and 28 expand accordingly, and the valve bodies 24 and 25 move to the positions shown in the figure. As a result, the inner side surfaces 24a and 25a of these valve bodies protrude inward from the water pipe inner peripheral surface 22a, thereby reducing the flowing water passage cross-sectional area. That is, the amount of water supply is reduced. When the water supply pressure returns to the normal pressure, the diaphragms 27 and 28 are contracted accordingly, the pair of valve bodies 24 and 25 are retracted up and down, and the on-off valve 26 constituted by these automatically returns to the fully open state. .
[0021]
The water-saving device 21 with this configuration can also obtain the same effects as the water-saving devices 1 and 11 described above.
[0022]
Here, as indicated by a dotted line in FIG. 3A, it is desirable to attach an adjustment bolt 31 that regulates the limit position of the diaphragms 27 and 28 in the contraction direction. In this way, the maximum opening degree of the on-off valve 26 can be limited. Of course, the minimum opening degree of the on-off valve 26 can be limited by arranging an adjusting means for restricting the maximum extension amount of the diaphragms 27 and 28.
[0023]
(Other embodiments)
In each of the above examples, the present invention is applied as a water-saving device for a water pipe. However, the present invention can be used as a flow rate adjusting device that is disposed in a fluid passage other than tap water and adjusts the amount of fluid passing through the fluid passage.
[0024]
In the third embodiment, an adjusting bolt is attached to limit the opening degree of the on-off valve. Of course, such an opening degree adjusting mechanism can be adopted for the first and second embodiments.
[0025]
【The invention's effect】
As described above, in the flow rate adjusting device of the present invention, the open / close valve that increases or decreases the fluid passage cross-sectional area of the fluid passage is opened and closed using the expansion and contraction means such as a tube that expands and contracts according to the increase or decrease of the fluid pressure in the fluid passage. I am doing so. Therefore, according to the present invention, the flow rate is adjusted by automatically increasing or decreasing the opening degree of the on-off valve in accordance with the fluid pressure. Therefore, according to the present invention, it is possible to realize a flow rate adjustment device suitable for use as a water-saving device for limiting the amount of water supply during water-saving.
[Brief description of the drawings]
FIG. 1 is a view showing a water-saving device according to a first embodiment of the present invention, wherein (a) is a schematic longitudinal sectional view during normal water supply, (b) is a schematic transverse sectional view thereof, and (c). Is a schematic longitudinal sectional view during water saving, and (d) is a schematic transverse sectional view thereof.
2A and 2B are views showing a water-saving device according to a second embodiment of the present invention, in which FIG. 2A is a schematic longitudinal sectional view thereof, and FIG. 2B is a schematic transverse sectional view thereof.
3A and 3B are views showing a water-saving device according to a third embodiment of the present invention, in which FIG. 3A is a schematic longitudinal sectional view thereof, and FIG. 3B is a schematic transverse sectional view thereof.
[Explanation of symbols]
1, 11, 21 Water-saving device 2, 12, 22 Water pipe 2a, 12a, 22a Water pipe inner peripheral surface 3 Tube 4 Inner opening part 14 of valve 14 Valve body 15 Telescopic cylinder 24, 25 Valve body 26 On-off valve 27, 28 Diaphragm 31 Adjustment bolt

Claims (4)

A fluid passageway;
Expansion and contraction means that expands and contracts according to the pressure of the fluid flowing through the fluid passage;
In conjunction with the expansion and contraction of the expansion / contraction means, a flow rate adjusting device having an on-off valve that increases or decreases the fluid passage cross-sectional area of the fluid passage,
It has an annular tube that functions as the expansion means and the on-off valve,
This annular tube
Formed from flexible or stretchable material,
The internal pressure is maintained at a predetermined value,
The outer peripheral surface portion of the annular tube is fixed to the inner peripheral surface of the fluid passage in a sealed state, and the fluid passage cross-sectional area increases or decreases according to the increase or decrease of the inner diameter dimension of the annular tube. . A fluid passageway;
Expansion and contraction means that expands and contracts according to the pressure of the fluid flowing through the fluid passage;
In conjunction with the expansion and contraction of the expansion / contraction means, a flow rate adjusting device having an on-off valve that increases or decreases the fluid passage cross-sectional area of the fluid passage,
The on-off valve is a valve body attached at one end so as to be rotatable over a predetermined angle range with respect to the inner surface of the fluid passage.
The expansion / contraction means is a bellows-like expansion / contraction cylinder that is disposed in the fluid passage and whose both ends are connected to the inner surface of the fluid passage and the valve body, respectively.
The internal pressure of the expansion / contraction cylinder is maintained at a predetermined value, and the fluid passage cross-sectional area increases / decreases by rotating the valve body according to expansion / contraction of the expansion / contraction cylinder. . A fluid passageway;
Expansion and contraction means that expands and contracts according to the pressure of the fluid flowing through the fluid passage;
In conjunction with the expansion and contraction of the expansion / contraction means, a flow rate adjusting device having an on-off valve that increases or decreases the fluid passage cross-sectional area of the fluid passage,
The on-off valve is a pair of valve bodies attached in the fluid passage so as to be movable by a certain distance in directions toward and away from each other,
The expansion / contraction means is a cylindrical diaphragm that is attached to each valve body and can expand and contract in the moving direction of each valve body,
Each diaphragm is in an airtight state in which an internal pressure is set to a predetermined value, and a fluid pressure is directly applied to the outer peripheral surface of the diaphragm. In any one of claims 1 to 3,
A flow rate adjusting device comprising a regulating means for regulating an upper limit or a lower limit of a moving range of the expansion / contraction means or the on-off valve.

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