JP2006097263A - Flush valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flush valve device without changing a water discharge quantity in factory delivery and after construction, while restraining generation of a large WH sound in closing, by making it hard for air in a pressure chamber to reside. <P>SOLUTION: In this flush valve device, a small hole for connecting a water supply part being at the primary pressure and the pressure chamber, and a relief valve for opening and closing the pressure chamber and a drain part being at the secondary pressure, are arranged inside a piston valve; the piston valve is lifted by making wash water of the pressure chamber flow out to the drain part by opening the relief valve; and the wash water is supplied to a flush toilet bowl communicating with this drain part by communicating the water supply part with the drain part. A chimney-shaped waterway for connecting a storage space of the relief valve and an upper end part of the piston valve, is formed in a recessed part space arranged in an upper part of the piston valve. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a piston valve device suitable for a water-saving flush valve capable of changing a closing time by allowing flush water to flow for a certain period of time after use in a flush toilet, etc., and then automatically stopping flush water. is there.

  Conventionally, the piston valve 1 in the flush valve device A includes a small hole 3 that connects the water supply portion 6 that is the primary pressure and the pressure chamber 5 inside the valve body 20 that constitutes the piston valve 1 in the casing 21, and the pressure chambers 5 and 2. A water channel 4 that connects the drainage section 7 that is the next pressure, and a relief valve 2 that opens and closes the water channel 4 are provided.

  FIG. 8 is a longitudinal sectional view showing a conventional structure. The flush water amount of the flush valve device A has a function of automatically lowering and stopping the water after the piston valve 1 is lifted once and a large amount of water comes out even if the user holds the handle 9 while operating it. It has a so-called non-holding mechanism.

The operation of the piston valve 1 provided with a non-holding mechanism will be described below.
Immediately after the flush valve device A is installed near the toilet (not shown), the pressure chamber 5 is filled with a large amount of air. When the user operates the handle 9 and pushes the push rod 8 to open the relief valve 2, the pressure chamber 5 is connected to the drainage section 7 which is the secondary pressure, and the pressure in the pressure chamber 5 is changed from the primary pressure to the secondary pressure. The piston valve 1 is lifted by the pressure balance. Next, when the piston valve 1 is lifted, a large amount of water starts to flow from the water supply unit 6 from the piston valve 1 and toilet cleaning is started. At the same time, the volume of the pressure chamber 5 decreases, and the air and water stored in the pressure chamber 5 pass through the relief valve 2 and are discharged to the drainage section 7.

  Next, when the piston valve 1 is lifted to a predetermined position, the relief valve 2 gets over the push rod 8 and the relief valve 2 is closed. When the relief valve 2 is closed, the pressure in the pressure chamber 5 increases from the secondary pressure to the primary pressure, and the piston valve 1 stops. This state is defined as full lift.

  After stopping in the full lift state, the relief valve 2 has a slide stem portion 10 that can shorten the entire length. Even if the push rod 8 is pushed, the relief valve 2 keeps riding on the push rod 8 and moves the piston valve 1. Not regulated. Accordingly, the piston valve 1 is lowered and water is stopped while water flows into the pressure chamber 5 through the small hole 3 connecting the water supply unit 6 and the pressure chamber 5 which are primary pressures.

  Further, the flush valve device A includes a mechanism for adjusting the water discharge amount by adjusting the spindle 11 and restricting the movement of the built-in valve 12. After the piston valve 1 is fully lifted, the piston valve 1 is lowered while water flows into the pressure chamber 5 through the small hole 3 that connects the water supply portion 6 that is the primary pressure and the pressure chamber 5. Initially, the built-in valve 12 is in contact with the spindle 11, the built-in valve 12 is opened, the flow passage area of the small hole 3 connecting the water supply unit 6 and the pressure chamber 5 which are primary pressures is increased, and the inflow speed of water is increased. . Therefore, the piston valve 1 descends quickly. When the piston valve 1 is lowered to a predetermined position and the built-in valve 12 is separated from the spindle 11, the built-in valve 12 is closed, and the flow passage area of the small hole 3 connecting the water supply unit 6 and the pressure chamber 5 which are primary pressures is reduced. The inflow speed of water becomes slow. Therefore, the piston valve 1 descends slowly (see Patent Document 1).

  Thus, by adjusting the position of the spindle 11, it is possible to close the piston valve 1 early to reduce the one-cycle water discharge amount, or conversely close the piston valve 1 late to increase the one-cycle water discharge amount. .

  Further, in the conventional flash valve device A, for the purpose of saving material and preventing sink marks at the time of molding, a substantially uniform thin structure is avoided while avoiding the pressed portion. As a result, a large hollow space 4 a is formed at the upper end of the piston valve 1, and the hollow space 4 a and a space for storing the relief valve 2 are connected by a water channel 4. When the piston valve 1 is fully lifted, the volume of the pressure chamber 5 is minimized. There is a possibility that air remains in the pressure chamber 5 for the minimum volume. The volume of the pressure chamber 5 is increased by the large recessed space 4a at the upper end of the piston valve 1. Therefore, the conventional flash valve device A has a structure in which air tends to remain in the pressure chamber 5.

It has been confirmed that a large WH sound is generated when the piston valve 1 is closed when a large amount of air is stored in the pressure chamber 5 of the piston valve 1. It has also been confirmed that this WH sound disappears when the air stored in the pressure chamber 5 is forcibly removed. Further, the air stored in the pressure chamber 5 gradually disappears with time, but the amount of water discharged for one cycle changes depending on whether the air is stored or not.
In a state where air remains in the pressure chamber 5, when the flash valve device A is used for many years, the air tends to decrease and the amount of water discharged tends to decrease. As a result, when the amount of water discharge decreased at the construction site, there was a risk of causing poor cleaning in the worst case.

JP 2001-262659 A (FIG. 2)

  The present invention has been made in order to solve the above-mentioned problems. The object of the present invention is to suppress the generation of a large WH sound at the time of closing by making it difficult for air to accumulate in the pressure chamber, and the amount of water discharged is a factory. The object is to provide a flush valve device that does not change after shipment and after construction.

  According to a first aspect of the present invention, a small hole that connects the water supply portion that is the primary pressure and the pressure chamber, and a relief valve that opens and closes the pressure chamber and the drainage portion that is the secondary pressure are provided inside the piston valve, and the relief valve is provided. By opening, the washing water in the pressure chamber flows out to the drainage part, the piston valve is raised, and the flushing toilet connected to the drainage part is connected with the water supply part and the drainage part. In the flush valve device, a chimney-shaped water passage that connects the storage space of the relief valve and the upper end of the piston valve is formed in a recess space provided in the upper part of the piston valve. .

  As a result, water fills the space closed by the large hollow space at the upper end of the piston valve and the chimney-shaped water channel, and the volume of air remaining in the pressure chamber is reduced when the piston valve is fully lifted. It is possible to suppress the generation of WH sound and the amount of water discharge does not change after factory shipment and after construction.

  According to a second aspect of the present invention, a plurality of the chimney-shaped water channels are formed from the storage space of the relief valve toward the upper end of the piston valve.

As a result, even when the piston valve is installed obliquely and the water channel that passes through the relief valve from the upper end of the piston valve is installed at the lowest position of the pressure chamber, this allows other water channels to be positioned higher. Therefore, the air remaining in the pressure chamber can be discharged to the secondary pressure side before all the water is discharged.
Therefore, since the air remaining in the pressure chamber can be discharged preferentially, the generation of a loud WH sound at the time of closing can be suppressed, and the amount of discharged water can be kept unchanged from the time of shipment from the factory.

  According to claim 3 of the present invention, the chimney-shaped water channel is provided at equal intervals along the circumferential direction of the piston valve.

As a result, even when the piston valve is installed obliquely and the water passage that passes through the relief valve from the upper end of the piston valve is installed at the lowest position of the pressure chamber, Since the remaining water channels installed at equal intervals are arranged at a high position, the air remaining in the pressure chamber can be discharged to the secondary pressure side before all the water is discharged.
Therefore, since the air remaining in the pressure chamber can be discharged preferentially, the generation of a loud WH sound at the time of closing can be suppressed, and the amount of discharged water can be kept unchanged from the time of shipment from the factory.

  According to a fourth aspect of the present invention, the upper end of the chimney-shaped water channel is formed in a protruding shape at the uppermost part of the piston valve, and a recess corresponding to the protrusion is provided in the lid of the casing housing the piston valve. And

As a result, the upper end of the water channel connecting the space for storing the relief valve and the pressure chamber is provided above, and the recess corresponding to the protrusion is provided on the lid, so that the air remaining in the upper portion of the pressure chamber is placed in one recess on the lid. Because it was collected, the air remaining in the pressure chamber could be discharged reliably.
Therefore, since the air remaining in the pressure chamber can be surely discharged, it is possible to suppress the generation of a loud WH sound at the time of closing, and the water discharge amount does not change after factory shipment and after construction.

The present invention provides a flushing device in which a small hole that connects a water supply portion that is a primary pressure and a pressure chamber, and a relief valve that opens and closes a drainage portion that is a secondary pressure inside a valve body that constitutes a piston valve in a casing. In the flush valve device for supplying flush water to the toilet bowl, the water passage connecting the space accommodating the relief valve and the pressure chamber is extended to the upper end of the piston valve in a chimney shape.
As a result, water fills the space closed by the large hollow space at the upper end of the piston valve and the chimney-shaped water channel, and the volume of air remaining in the pressure chamber is reduced when the piston valve is fully lifted. It is possible to suppress the generation of WH sound and the amount of water discharge does not change after factory shipment and after construction.

Hereinafter, the present invention will be described more specifically with reference to the drawings. 1 and 2 are longitudinal sectional views of a first embodiment of the present invention.
A small hole 3 that connects the water supply portion 6 that is the primary pressure and the pressure chamber 5 is provided in the valve body 20 that constitutes the piston valve 1 in the casing 21, and the pressure chamber 5 and the drainage portion 7 that is the secondary pressure are further opened and closed. The relief valve 2 was provided, and the water channel 4 connecting the space for housing the relief valve 2 and the pressure chamber 5 was extended to the upper end of the piston valve 1 in a chimney shape. Immediately after installing the flash valve device A, the pressure chamber 5 is in a state of being filled with a large amount of air.

FIG. 1 shows a state in which the handle 9 is operated to push the push rod 8 to open the relief valve 2, and the pressure chamber 5 is connected to the drainage section 7 which is the secondary pressure. Next, the pressure in the pressure chamber 5 decreases from the primary pressure to the secondary pressure, and the piston valve 1 starts to lift with a pressure balance.
Next, when the piston valve 1 is lifted, a large amount of water starts to flow from the water supply unit 6 from the piston valve 1, and toilet cleaning (not shown) is started. At the same time, the volume of the pressure chamber 5 decreases, and the air and water stored in the pressure chamber 5 pass through the relief valve 2 and are discharged to the drainage section 7.

FIG. 2 shows a state in which the piston valve 1 is lifted to a predetermined position, the relief valve 2 gets over the push rod 8 and the relief valve 2 is closed and temporarily stopped.
When the relief valve 2 is closed, the pressure in the pressure chamber 5 increases from the secondary pressure to the primary pressure, and the piston valve 1 stops. This state is defined as full lift. During this full lift, the volume of the pressure chamber 5 is minimized.
The relief valve 2 is open until just before the full lift, and the water and air in the pressure chamber 5 are discharged to the drainage part 7, so that there is a possibility that air remains in the minimum volume part at the time of full lift.

In the present invention, since the space closed by the large recess space 4a provided at the upper end of the piston valve 1 and the chimney-shaped water channel 4 has no hole through which water flows out, the water 14 once reaches the upper end of the piston valve 1. It is set as the structure which expels air by setting it as the structure which water does not escape semipermanently if it accumulates.
As a result, the volume of air remaining in the pressure chamber 5 is reduced, so that the generation of a loud WH sound at the time of closing is suppressed, and a flush valve device in which the water discharge amount does not change after factory shipment and after construction is supplied. It becomes possible.

  After stopping in the full lift state, the relief valve 2 has a slide stem portion 10 that can shorten the entire length. Even if the push rod 8 is pushed, the relief valve 2 keeps riding on the push rod 8 and moves the piston valve 1. There is no regulation. Therefore, the piston valve 1 is lowered while water flows into the pressure chamber 5 through the small hole 3 that connects the water supply unit 6 and the pressure chamber 5 which are primary pressures, and the water can be stopped.

Further, the flush valve device A includes a mechanism for adjusting the water discharge amount by adjusting the spindle 11 and restricting the movement of the built-in valve 12. That is, after the piston valve 1 is fully lifted, the piston valve 1 is lowered while water flows into the pressure chamber 5 through the small hole 3 that connects the water supply portion 6 that is the primary pressure and the pressure chamber 5.
Initially, the built-in valve 12 is in contact with the spindle 11, the built-in valve 12 is opened, and the flow passage area of the small hole 3 connecting the water supply unit 6 and the pressure chamber 5, which is the primary pressure, is increased, and the water inflow rate is high Become. Therefore, the piston valve 1 descends quickly.
When the piston valve 1 is lowered to a predetermined position and the built-in valve 12 is separated from the spindle, the built-in valve 12 is closed, and the area of the small hole 3 connecting the water supply portion 6 and the pressure chamber 5 which is the primary pressure is reduced, and the inflow speed of water. Becomes slower. Therefore, the piston valve 1 descends slowly.

  Thus, by adjusting the position of the spindle 11, it is possible to close the piston valve 1 early to reduce the one-cycle water discharge amount, or conversely close the piston valve 1 late to increase the one-cycle water discharge amount. .

3, 4 and 5 show a second embodiment according to the present invention. The water passage 4 connecting the space for housing the relief valve 2 and the pressure chamber 5 is extended to the upper end of the piston valve 1 in a chimney shape. Specifically, FIG. FIG. 4 shows the piston valve 1 provided at the upper end portion at equal intervals in the circumferential direction.
When the piston valve 1 is lifted, the volume of the pressure chamber 5 is reduced, and air and water remaining in the pressure chamber 5 pass through the relief valve 2 and are discharged to the back pressure portion 7. When the piston valve 1 is installed obliquely as shown in FIG. 5, the air remaining in the pressure chamber 5 moves to the higher side and the water moves to the lower side. When the water channel 4 passing through the relief valve 2 from the upper end of the piston valve 1 is installed at the lowest position of the pressure chamber 5, the water 14 remains at the upper end of the water channel 4, and when the piston valve 1 is lifted, all the water After the air is discharged from the water channel, air is discharged.

  As shown in FIGS. 3 and 4, the upper end of the other water channel 4 is arranged at a higher position. Therefore, when the piston valve 1 is lifted, the air remaining in the pressure chamber 5 is discharged to the drainage section 7 before discharging all the water. It becomes possible to do. Accordingly, air remaining in the pressure chamber 5 can be discharged preferentially over water, so that the volume of air remaining in the pressure chamber 5 can be reduced. As a result, the volume of air remaining in the pressure chamber 5 is reduced, so that the generation of a loud WH sound at the time of closing is suppressed, and a flush valve device in which the water discharge amount does not change after factory shipment and after construction is supplied. It becomes possible.

FIG. 6 shows a third embodiment according to the present invention. A protrusion 22 is provided at the uppermost part of the piston valve 1 at the upper end of the water passage 4 connecting the space for housing the relief valve 2 and the pressure chamber 5, and a recess 13 corresponding to the protrusion 22 is provided in the lid 15 of the casing 21. By providing a projection 21 at the uppermost part of the piston valve 1 at the upper end of the water channel connecting the space for housing the relief valve 2 and the pressure chamber 5, the position of the inlet is provided higher, and when the piston valve 1 is lifted, the pressure chamber The air remaining in 5 can be discharged to the drainage section before all the water is discharged.
As a result, the volume of the air remaining in the pressure chamber 5 is reduced, so that the generation of a loud WH sound at the time of closing is suppressed, and a flush valve device in which the water discharge amount does not change after factory shipment and after construction is supplied. Is possible. Further, since the recess corresponding to the protrusion 22 is provided in the lid 15, the air remaining in the upper portion of the pressure chamber 5 can be concentrated in one place in the recess 13 of the lid 15, so that it remains in the pressure chamber 5. It is possible to discharge the air reliably.

FIG. 7 is a diagram showing the verification of the effect of the second embodiment of the present invention. In the experiment, a comparison was made between the conventional product and the product of the present invention.
The piston valve 1 was housed in a transparent lid 15 made of acrylic, and from the state where the pressure chamber 5 was initially filled with air, a flash operation was performed to compare the air reservoir state. The water pressure condition was 0.2 MPa for both the conventional product and the product of the present invention. FIG. 7 shows the state of the air stored in the pressure chamber 5 before the flash (0 times), 1 flash, and 2 flashes.
As a result of the test, it is observed that a large amount of air remains in the pressure chamber 5 in both before the flash (0 times).

In FIG. 7, it can be confirmed that air remains in the space surrounded by the solid line. In the conventional product, about 3 mm thick air remains after the first flash, and about 2 mm thick air remains after the second flash. In the product of the present invention, only a small amount of air remains on the circumference of the upper end surface of the piston valve 1 at the first time. In the second time, it was found that the air was almost completely removed by leaving only a few more bubbles.
Thus, when comparing the conventional product and the present invention product, a clear significant difference was observed in the amount of air remaining in the pressure chamber 5, confirming that the present invention is excellent in removing the air from the pressure chamber 5. It was done.

(A) is the longitudinal cross-sectional view which shows 1st Example of this invention, (b) is a partially expanded view of the longitudinal cross-sectional view which shows 1st Example of this invention. It is a longitudinal cross-sectional view which shows the 1st Example of this invention. It is a top view which shows the 2nd Example of this invention. It is a top view which shows the 2nd Example of this invention. It is a longitudinal cross-sectional view which shows the 2nd Example of this invention. It is a longitudinal cross-sectional view which shows the 3rd Example of this invention. It is a figure which shows the verification result of the effect of this invention. It is a longitudinal cross-sectional view which shows a conventional structure.

Explanation of symbols

A: Flush valve device 1: Piston valve 2: Relief valve 3: Small hole 4: Water channel 4a: Recess space 5: Pressure chamber 6: Water supply portion 7: Drainage portion 8: Push rod 9: Handle 10: Slide stem portion 11: Spindle 12: Built-in valve 13: Recess 14: Water 15: Lid 20: Valve 21: Casing 22: Protrusion

Claims (4)

A small hole that connects the water supply section that is the primary pressure and the pressure chamber, and a relief valve that opens and closes the pressure chamber and the drainage section that is the secondary pressure are provided inside the piston valve, and the relief valve is opened by opening the relief valve. In the flush valve device for supplying washing water to a flush toilet connected to the drainage unit by causing the flushing water to flow out to the drainage unit, raising the piston valve, and connecting the water supply unit and the drainage unit. A flush valve device characterized in that a chimney-shaped water passage connecting the storage space of the relief valve and the upper end portion of the piston valve is formed in a recess space provided in the upper part of the valve. 2. The flush valve device according to claim 1, wherein a plurality of the chimney-shaped water channels are formed from the storage space of the relief valve toward the upper end of the piston valve. The flush valve device according to claim 2, wherein the chimney-like water passages are provided at equal intervals along a circumferential direction of the piston valve. 2. The flash according to claim 1, wherein an upper end of the chimney-shaped water channel is formed in a protruding shape at the uppermost part of the piston valve, and a recess corresponding to the protrusion is provided in a lid of a casing housing the piston valve. Valve device.