JP2002021144A - Low tank flow controller - Google Patents

Abstract

(57) [Problem] To provide a flow control device for a low tank in which the amount of water used during washing can be easily adjusted to save water and a sufficient washing effect can be obtained even with a small amount of washing water. SOLUTION: A flow regulating cylinder 20 surrounding a float valve 4 and an overflow pipe 5 in a watertight state is installed inside a low tank 1 for storing washing water, and the flow regulating cylinder 20 is provided on a side wall. A plurality of water passage holes 23 are provided at appropriate intervals in the circumferential direction, and adjustment means 25 to 27 for changing the opening cross-sectional area of the water passage hole 23 are provided. The water flow holes 23 are provided in the inner circumferential direction of the flow control cylinder 20 and obliquely downward, and the washing water flowing through the water flow holes 23 descends as a vortex in the flow control cylinder 20. It is preferable that it is comprised as follows.

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 low tank that can save water by adjusting the amount of water used for washing the washing water stored in the low tank of the flush toilet.

[0002]

2. Description of the Related Art A low tank attached to a flush toilet always stores a constant amount of flush water.
However, it has been recognized that there is a considerable difference in the amount of water capable of sufficiently flushing filth depending on the discharge route from the toilet to the sewer pipe, and various water saving devices and flow control devices have been proposed.

For example, Japanese Utility Model Laid-Open Publication No. Hei 6-14269 discloses a method in which a plurality of water regulators made of heavy materials are installed in a low tank to physically limit the water storage volume in the low tank, and the amount of water to be washed during the cleaning is reduced. There is disclosed a water saving device designed to reduce water consumption.

In Japanese Patent Application Laid-Open No. 10-121541, a flow regulating cylinder which surrounds a float valve and an overflow pipe in a watertight state is installed inside a low tank, and an opening and closing is made at an inlet provided on a lower side wall of the cylinder. There is disclosed a flow control device for a low tank in which a valve is provided and the on-off valve is opened in conjunction with a float valve.

[0005]

The former is a simple water-saving means, but there is a risk that the water flow adjusting body moves in the low tank due to the water flow at the time of washing, which may hinder the opening / closing operation of the float valve. In the latter case, if insufficient cleaning occurs during the first cleaning, additional cleaning water can be supplied promptly, but the amount of water used during the first cleaning can be easily adjusted. There was a problem that you can not. Further, the structure is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a flow control device for a low tank, which can easily adjust the amount of water used for washing to save water and can obtain a sufficient washing effect even with a small amount of washing water. I do.

[0007]

Means for Solving the Problems To achieve the above object, the present invention provides a low tank for storing washing water.
A flow regulating cylinder surrounding the float valve and the overflow pipe in a watertight state is installed, wherein the flow regulating cylinder is provided with a plurality of water holes at appropriate intervals in a circumferential direction on a side wall, And an adjusting means for changing an opening cross-sectional area of the water passage hole.

The water flow hole is provided in the inner peripheral direction of the flow control cylinder and obliquely downward, and the washing water flowing through the water flow hole is swirled in the flow control cylinder and descends. It is desirable to have been.

The adjusting means is an adjusting band provided on an outer peripheral wall of the flow rate adjusting cylinder so as to be movable in a circumferential direction, and the adjusting band has a plurality of through holes corresponding to the water holes. Is provided, by changing the position of the adjustment band, it is configured to adjust the degree of overlap of the water hole and the through hole to change the opening cross-sectional area of the water hole, The structure is simple, and the amount of water used during washing can be adjusted by a simple operation.

[0010] As the adjusting means, an appropriate number of the water holes may be fitted and hermetically sealed to change the opening cross-sectional area of the water holes as a whole.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a low tank 1 provided with a flow control device according to the present invention. A ball tap 2 for connecting a water supply pipe and a drainage operation handle 3 are provided on an upper side wall of the low tank 1, and a float valve 4 and an overflow pipe 5 are provided inside. The ball tap 2 is provided with a floating ball 7 via an operating rod 6. When a certain amount of washing water is stored in the low tank 1, the floating ball 7 is mounted.
The water supply is stopped by buoyancy acting on the water. Further, the float valve 4 is connected to a valve operating rod 8 connected to the drain operation handle 3 in a suspended state via a string-shaped connecting member 9.

A drain port 1 provided at the bottom of the raw tank 1
The drain pipe 11 connected to the drain pipe 10 is formed integrally with the overflow pipe 5, and the drain port 10 is provided with a float valve seat 12. In addition, drainage cylinder 1
A spiral guide groove 13 is provided on the inner wall surface of the nozzle 1 to increase the flow rate of the washing water, as described later. Drain 11
Protrudes downward through an opening 14 provided at the bottom of the raw tank 1 and is connected to a toilet (not shown). The float valve 4 is swingably supported by a swing arm 15 having one end pivotally connected to a lower portion of the overflow pipe 5, and is seated on a valve seat 12 to close the drain port 10. On the other hand, the lower end opening 1 of the overflow pipe 5
6 shows a state where the float valve 4 is seated on the valve seat 12 and the drain port 10 is closed,
Is in communication with The above-described structure is the same as that of the conventional low tank, but the flow regulating cylinder 20 according to the present invention is installed inside the low tank 1 so as to surround the float valve 4 and the overflow pipe 5. The flow rate adjusting cylinder 20 is formed of a plastic material or the like, and has a flange 21 connected to the lower end fixed to the bottom of the low tank 1 with a sheet packing 22 interposed therebetween in a watertight state. The means for fixing the cylindrical body 20 includes a flange 21 using an adhesive.
The seat packing 22 and the seat packing 22 are preferably fixed to the bottom of the low tank 1, but may be fixed using bolts and nuts or other fixing tools.

On the side wall of the intermediate portion of the flow regulating cylinder 20,
A plurality of water holes 23 are provided at appropriate intervals in the circumferential direction, and an annular groove 24 is provided on the outer peripheral surface so as to surround the outside of the series of water holes 23 (see FIG. 3). .
The annular groove 24 is provided for engaging an adjustment band 25 described later. The adjustment band 25 adjusts the amount of water that the washing water stored in the low tank 1 flows into the flow rate adjusting cylinder 20 through the water passage hole 23, and as shown in FIG. After a plurality of through-holes 26 corresponding to 23 are provided, the handle 27 is formed by bending in an annular shape and bending both ends outward.
The adjustment band 25 thus formed is fitted in the annular groove 24 and is slidably attached to the outer peripheral portion of the flow rate adjusting cylinder 20 in the circumferential direction. As shown in FIG. In the circumferential direction, the degree of overlap between the water passage holes 23 and the excellent holes 26 is adjusted, and the opening cross-sectional area of each water passage hole 23 is changed. The amount of water flowing into the flow rate adjusting cylinder 20 through 23 can be adjusted.

As shown in FIG. 5, instead of the adjustment belt 25, an appropriate number of water holes 23 are fitted with a hermetic plug 30 to seal the water holes 23 so as to change the opening cross-sectional area of the water holes 23 as a whole. You may.

The adjusting means for changing the opening cross-sectional area of the water hole 23 is not limited to the adjusting band 25 and the hermetic plug 30 as a matter of course.

FIGS. 6 and 7 show a modification of the water passage holes 23 provided in the flow regulating cylinder 20.
It is provided to extend in the inner circumferential direction of the cylindrical body 20 and obliquely downward. When the water passage hole 23 is formed in such a shape, the washing water flowing into the flow rate adjusting cylinder 20 through the water passage hole 23 descends as a vortex in the cylinder 20, so that the flow velocity increases,
A sufficient cleaning effect can be obtained even with a small amount of clean water.

Next, the operation of cleaning the raw tank 1 provided with the flow rate adjusting device having the above-described configuration will be described. FIG.
This shows a state in which predetermined washing water is stored in the low tank 1, and the water level L is equal to the upper end opening 28 of the flow rate adjusting cylinder 20.
It is located above. When the drain operation handle 3 is rotated in this state, the float valve 4 is pulled up via the valve operating rod 8 and the connecting member 9, and the washing water in the cylindrical body 20 is discharged from the drain port 10 through the drain cylinder 11 to the toilet (FIG. (Not shown) to perform a cleaning action. During this time, the float valve 4 maintains the open state by buoyancy. Until the water level L of the washing water in the low tank 1 drops to the position of the upper end opening 28 of the cylindrical body 20, the washing water stored outside the cylindrical body 20 also flows into the cylindrical body 20 from the upper end opening 28. Therefore, the water level L in the low tank 1 falls while maintaining the same height.

When the water level L reaches the upper end opening 28 of the cylindrical body 20, the washing water outside the cylindrical body 20 can flow into the cylindrical body 20 only through the water passage hole 23, and the amount of water flowing into the cylindrical body 20 is Since the water level is limited by the size of the opening cross-sectional area of the water passage hole 23, the lowering of the water level is decelerated. On the other hand, the washing water in the cylinder 20 is subsequently discharged from the drain port 10 through the drain cylinder 11, so that the water level of the washing water in the cylinder 20 drops rapidly. As a result, a level difference occurs between the water level of the cleaning water outside the cylinder 20 and the water level of the cleaning water inside the cylinder 20, and as the difference in the water level increases, the cleaning water outside the cylinder 20 increases. The ratio of flowing through the water holes 23 into the cylindrical body 20 increases.

When the water passage hole 23 and the through hole 26 of the adjustment band 25 are aligned and the opening cross-sectional area of the water passage hole 23 is maximized, the water level of the washing water outside the cylindrical body 20 passes. Water hole 2
3 until it reaches a position A at the same height as the lower edge of the cylindrical body 20.
The washing water outside the cylinder flows into the cylindrical body 20 through the water passage hole 23 and is discharged from the outlet 10 through the drain pipe 11 together with the washing water in the cylindrical body 20. When the level of the washing water outside the cylinder 20 reaches the position A, the washing water outside the cylinder 20 cannot flow into the cylinder 20 from the water pipe 23 and remains in the low tank 1 outside the cylinder 20 as it is. . Subsequently, the cylindrical body 20
When the washing water remaining in the inside is discharged from the drain port 10 through the drain pipe 11, the float valve 4 returns to the closed position by its own weight, sits on the valve seat 12, and seals the drain port 10.

When the cleaning water in the cylindrical body 20 is discharged from the drain port 10 through the drain cylinder 11, the cleaning water is swirled by the spiral guiding groove 13 of the drain cylinder 11 and accelerated.
As a result, the flow rate of the washing water increases, and the washing action is effectively performed. In particular, as shown in FIGS. 6 and 7, when the water passage holes 23 are provided in the inner circumferential direction of the cylindrical body 20 and obliquely downward, the washing water flowing into the cylindrical body 20 through the water passage holes 23. Causes a vortex in the cylinder 20. When the washing water flows into the drainage pipe 11 from the drainage port 10 in this swirling state, the cleaning water is further accelerated by the surplus action with the spiral guide groove 13 of the drainage pipe 11, the flow velocity is greatly increased, and a small amount of A sufficient washing effect can be obtained even with washing water.

On the other hand, the position of the adjusting band 25 is changed by moving the adjusting band 25 in the circumferential direction of the cylindrical body 20, and as shown in FIG.
When the degree of overlap between the 3 and the through hole 26 of the adjustment band 25 is adjusted to reduce the cross-sectional area of the opening of the water passage hole 23, the washing water outside the cylinder 20 enters the cylinder 20 through the water passage hole 23. The amount of incoming water is limited. Therefore, by adjusting this water amount, the water level of the washing water outside the cylindrical body 20 is adjusted to the position A in FIG.
When the water reaches the upper position B or the position C, the washing water in the cylindrical body 20 is completely discharged from the drain port 10 through the drain pipe 11, and the float valve 4 is set to return to the closed position by its own weight. If this is done, the amount of water used during washing is adjusted, and the amount of used water is stopped at any of the positions A through C in the low tank 1. Therefore,
The washing water stored in the low tank 1 is saved accordingly. Moreover, the amount of water used for cleaning can be arbitrarily adjusted only by changing the opening cross-sectional area of the water passage hole 23.

[0023]

As described above, according to the flow rate adjusting device of the present invention, the amount of water used for washing the washing water stored in the low tank can be easily adjusted to save water. In particular, according to the second aspect of the present invention, a sufficient washing effect can be obtained even with a small amount of washing water, which is extremely economical in combination with the water saving effect.

Further, the flow control device according to the present invention has a simple structure and is easy to manufacture. In addition, the work of attaching to the low tank is simple, and no skill is required. Further, it can be easily attached to a low tank of an existing flush toilet.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a main part of a low tank provided with a flow control device according to the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line 2-2 of FIG.

FIG. 3 is a vertical sectional front view of a main part of a flow rate adjusting cylinder.

FIG. 4 is a perspective view of a flow rate adjustment band.

FIG. 5 is a cross-sectional plan view showing a flow rate adjusting cylinder provided with another adjusting means.

FIG. 6 is a cross-sectional plan view showing another embodiment of the flow regulating cylinder.

FIG. 7 is a vertical sectional view taken along line 7-7 in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low tank 3 Drainage operation handle 4 Float valve 5 Overflow pipe 10 Drainage port 11 Drainage cylinder 12 Float valve seat 13 Guide groove 20 Flow control cylinder 21 Flange part 22 Seat packing 23 Water passage hole 24 Annular groove 25 Adjustment band 26 Transparency Hole 27 Handle 28 Upper end opening 30 Seal plug L Water level

Claims (5)

[Claims] 1. Inside a low tank for storing washing water,
A flow regulating cylinder surrounding the float valve and the overflow pipe in a watertight state, wherein the flow regulating cylinder is provided with a plurality of water holes at appropriate intervals in a circumferential direction on a side wall, And an adjusting means for changing an opening cross-sectional area of the water hole. 2. The water flow hole is provided in an inner circumferential direction of the flow control cylinder and obliquely downward, and the washing water flowing through the water flow hole is swirled in the flow control cylinder and descends. The flow rate adjusting device for a low tank according to claim 1, wherein 3. An adjusting band provided on an outer peripheral wall of the flow rate adjusting cylinder so as to be movable in a circumferential direction, wherein the adjusting band has a plurality of through holes corresponding to the water holes. Is provided, and by changing the position of the adjustment band, the degree of overlap between the water hole and the through hole is adjusted to change the opening cross-sectional area of the water hole. 3. The flow control device for a low tank according to 1 or 2. 4. The flow control device for a low tank according to claim 1, wherein the adjusting means is a hermetic plug inserted into an appropriate number of the water holes. 5. The flow control device for a low tank according to claim 1, wherein a spiral guide groove is provided on an inner wall surface of the drainage tube connected to a drain port at a bottom portion of the low tank.