JPH0441365Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a constant flow device with a water stop valve that is effective when applied to a washing control device that automatically controls the flow of washing water into the urinals of public men's restrooms.
In particular, the present invention relates to a constant flow rate device with a water stop valve that can always maintain a constant flow rate of water supply without being affected by fluctuations in water supply pressure.

Controlling the supply of flushing water to the toilet bowl only when flushing is necessary is extremely important from the perspective of saving water. On the other hand, from a sanitary standpoint, it is desirable that washing water be always supplied after use.

Several automatic cleaning methods have already been proposed to meet these demands. The most common method is called the automatic siphon method, in which water is continuously supplied at a small flow rate to a tank installed at a high position (high tank).
When the water level in the high tank reaches a predetermined height, an automatic siphon is activated to flush out the wash water, which is repeated. However, since water is constantly supplied, the cleaning cycle is almost constant, and cleaning is performed even during times when it is hardly used, so it cannot be said to be sufficient from the standpoint of water conservation. In order to improve the water-saving effect, a method is being considered in which the use of the toilet is detected using signals from a human body sensor, a door switch, a light switch, etc., and water is supplied to the high tank for a certain period of time from the time of this detection. In this case, the cleaning water does not flow when not in use, but the operation of supplying water from the time of detection to the activation of the automatic siphon is controlled solely by the time element, so it is possible to If there is a fluctuation in water pressure caused by a belt, etc., the amount of water supplied to the high tank within the time set by the timer will change, causing more water to flow than the required amount, or the water level not reaching the automatic siphon activation level. Therefore, it is easy for the washing water to not flow.

The purpose of this invention is to be able to supply a high tank with an automatic siphon with a constant flow of water each time the use of the toilet bowl is detected, regardless of the water pressure on the supply side. To provide a constant flow device with a water stop valve that can reliably supply the minimum necessary amount of flushing water to a toilet bowl.

First, an overview of a toilet flushing system to which the constant flow device with a water stop valve of this invention is applied will be explained with reference to FIG. In FIG. 1, in addition to a manual water stop valve 3 which is normally kept open, a water supply line 2 for supplying water to a high tank 1 includes an electromagnetically driven water stop valve 4 and a differential pressure generating mechanism. A constant flow rate device 6 with a water stop valve is provided. This water stop valve 4
is driven to open in response to a signal from the controller 9 when the use of one of the toilet bowls 7 is detected by a suitable sensor 8, thereby supplying water to the high tank 1 through the water supply line 2. is supplied.
In this case, the differential pressure generating mechanism 5 extracts the water pressure upstream and downstream of the water supply valve 4, that is, the difference between the water supply pressure and the drainage pressure, and the aperture is changed according to the extracted differential pressure to keep the differential pressure constant. This makes the supply water a constant flow rate.

The high tank 1 is equipped with a normal automatic siphon (not shown), and when the water level in the high tank 1 reaches the operating water level of this automatic siphon, the water in the high tank 1 passes through the flush water system path 10 to each toilet bowl 7. It is now being supplied to

Therefore, by controlling the opening time of the water supply valve 4 to a constant value using, for example, a timer built into the controller 9, the water supply amount can always be kept constant. Then, the water supply valve 4 is closed in response to a time-up signal from the timer, thereby stopping the water supply to the high tank 1. The set value of the water supply amount in the controller 9 is the high tank 1
The water level in the automatic siphon is selected to be slightly larger than the amount of water required to raise the water level to the operating level of the automatic siphon. The siphon operates, and immediately after that, the water cutoff valve 4 is closed. This operation is completely unaffected by fluctuations in the water pressure on the water supply side acting on the water supply line 2.

FIG. 2 shows an example of a specific structure of the constant flow device 6 with a water stop valve of this invention. This constant flow device 6 with a water stop valve has a housing 11 having an inlet port 12 and an outlet port 13, and a flow path 15 in which a valve seat 14 is provided between the inlet port 12 and the outlet port 13.

Further, a chamber 16 is provided in the housing 11 at a position that passes through the valve seat 14 and is arranged in parallel with the flow path, and inside this chamber 16 there is a first pressure receiving actuating body 17 and a second pressure receiving body 17 that integrally interlock with each other. A pressure receiving body 18 is provided. This pressure receiving body 17,
18 may be a piston other than the rolling diaphragm shown in the illustrated example.

The first chamber 16a of the chamber 16 partitioned by the first pressure receiving body 17 is connected to the first pilot flow path 19.
It is connected to the inlet port side flow path via. This first pilot flow path 19 has an orifice 20.
and a solenoid valve 21 are provided. This solenoid valve 21
is connected to the plunger 23 of the electromagnetic solenoid 22, and is normally pressed by a spring 24 to the closed position, but moves to the open position when the electromagnetic solenoid 22 is energized.

The first pressure receiving body 17 and the second pressure receiving body 18
The second chamber 16b of the chamber 16 is partitioned by
It is connected to the outlet port side flow path via the second pilot flow path 25. A communication passage 26 is formed in the first pressure receiving body 17 so as to connect the first chamber 16a and the second chamber 16b, and an orifice 27 is provided in the communication passage 26. Further, a valve body 29 is attached to the second pressure receiving body 18 via a connecting shaft 28, and this valve body 29 is in contact with the valve seat surface (lower surface in the illustrated example) facing the outlet port side flow path. It's starting to move away. Then, the valve seat surface facing the inlet port side flow path (the top surface in the illustrated example) and the connecting shaft 2
A port pattern 30 is formed between 8 and 8.

A pressing force in the closing direction is constantly applied to the valve body 29 by a spring 31, and this pressing force can be adjusted by the screwing amount of a spring seat 32 screwed into the housing 13.

Now, when the electromagnetic solenoid 22 is in a non-energized state, the electromagnetic valve 21 is pressed by the spring 24 and closes the first pilot flow path 19. Therefore, both the first chamber 16a and the second chamber 16b of the chamber 16 have the pressure _P2 of the outlet port side flow path, and the first and second chambers
There is a downward pressure on the upper surface of the pressure receiving body 17, 18.
The pressure P ₂ acts upward on the lower surface of the first pressure receiving actuating body 17 and the valve body 29, and the pressure _{P 1} of the inlet port side flow path acts upward on the bottom surface of the second pressure receiving actuating body 18. acts on the upper surface of the valve body 29, and a downward pressure _P1 acts on the upper surface of the valve body 29. Therefore, the pressures acting on both sides of the first and second pressure receiving bodies 17, 18 and the valve body 29 are balanced, and the valve body 29 is held in the closed position by the pressing force F of the spring 31. In other words, the valve body 29 functions as a water stop valve.

Next, when the electromagnetic solenoid 22 is energized, the plunger 23 is pulled up against the spring 24, so that the electromagnetic valve 21 is connected to the first pilot flow path 1.
Open 9. For this reason, the first chamber 16 of the chamber 16
The valve element a communicates with the inlet port side flow path until the pressure in the first chamber approaches pressure P ₁ and the pressure difference ΔP (P ₁ - P ₂ ) balances with the pressing force F of the spring 31. 2
9 to open the valve seat 14.

On the other hand, when the port pattern 30 is narrowed due to the movement of the valve body, the differential pressure △P decreases and the opening degree of the valve body becomes smaller.As a result, the differential pressure △P increases again and the opening degree of the valve body The differential pressure ΔP is made constant by repeating the repetitive operation such that the pressure is increased. As a result, the flow rate is also made constant.

As described above, according to this invention, the amount of water supplied can always be maintained at a constant rate without being affected by fluctuations in water pressure, so by specifying the water supply time with a timer etc., it is possible to reliably supply a fixed amount of water. can do.

Therefore, if the constant flow device with a water stop valve of this invention is applied to a toilet flushing system, it will be possible to automatically supply a fixed amount of water to the high tank when the use of the toilet is detected, and the water will always be supplied to the high tank. This provides a stable cleaning operation and also helps save water since no excess water is flushed.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an overview of a toilet flushing system to which the constant flow rate device with a water stop valve of this invention is applied, and Fig. 2 is a longitudinal section showing an embodiment of the constant flow rate device with a water stop valve of this invention. It is a front view. 1...High tank, 2...Water supply system line, 4...Water supply valve, 5...Differential pressure generation mechanism, 6...Constant flow device with water stop valve, 7...Toilet, 8...Sensor , 9...
Controller, 10...Washing water system path, 11...Housing, 12...Inlet port, 13...Outlet port, 14...Valve seat, 15...Flow path, 16...Chamber, 17, 18...Pressure receiving operation body, 19...first pilot channel, 20, 27...orifice,
21...Solenoid valve, 25...Second pilot flow path,
26... Communication path, 28... Connection shaft, 29... Valve body, 30... Port pattern, 31... Valve body pressure spring, 32... Spring seat.

Claims (1)

[Claims for Utility Model Registration] (1) A flow path formed between an inlet port and an outlet port, and a valve seat formed in the middle of the flow path;
a chamber passing through the valve seat and disposed in parallel with the flow path; a first pressure receiving body and a second pressure receiving body disposed within the chamber and integrally interlocking;
a first chamber that connects the first chamber of the chamber partitioned by the first pressure receiving body and the inlet port side flow path;
a pilot flow path, the first pressure receiving body and the second pressure receiving body;
the second chamber of the chamber separated from the pressure-receiving body;
a second pilot flow path connecting the chamber and the outlet port side flow path; a communication path provided in the first pressure receiving body so as to connect the first chamber and the second chamber; and the first pilot flow path. a solenoid valve that opens and closes; a valve body that opens and closes the valve seat attached to the second pressure receiving body via a connecting shaft; a port pattern formed between the connecting shaft and the valve seat; A constant flow rate device with a water stop valve, which is equipped with a spring that applies a pressing force in the closing direction to the valve body. (2) The constant flow rate device with a water stop valve according to claim (1) of the utility model registration, wherein the pressing force of the spring is adjustable.