JP2822265B2 - Flash valve - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flush valve used for flushing a toilet.

(Prior art) A Western-style toilet may be used for both stool and urine, and the stool is flushed with a large amount of water (hereinafter referred to as "large flush"), and the urine with a small amount of water. (Hereinafter, referred to as “small washing”) is desirable for saving water.

2. Description of the Related Art In recent years, an automatic flush valve incorporating a solenoid valve and operated by a light push-button operation is being adopted. The following is known as a technique for distinguishing the large flush from the small flush by the automatic flush valve.

One of them is a technique of connecting two types of timers to the built-in solenoid valve to make a difference in valve opening time, and a technique of providing two kinds of coils to the built-in solenoid valve to make a difference in valve opening stroke.

Alternatively, this is a technique in which two cleaning valves are provided side by side, and only one of them is opened for small cleaning, and the other or both are opened for large cleaning.

(Problems to be Solved by the Invention) However, the above-described technology for providing a time difference or a stroke difference to the solenoid valve has no problem when the hydraulic pressure on the primary side of the valve is stable. The amount of water supplied changes accordingly. Generally, the washing valve is connected to the multipurpose pipe in a branch, and the internal pressure of the multipurpose pipe fluctuates depending on the receiving balance.

In addition, when two cleaning valves are arranged in parallel, the required space is naturally doubled and the cost is increased.

Accordingly, an object of the present invention is to provide a flush valve which can stably perform large / small washing against primary-side pressure fluctuations.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides at least two systems in which a fixed orifice hole and a sub-piston valve are juxtaposed on a piston of a flash valve, and each of the flash valves has an electromagnetic valve. A pressure relief passage is provided. In this case, the first depressurizing passage has a water passage capacity larger than the sum of the water passage capacity of the fixed orifice hole and the water passage capacity of the sub-piston valve. Is larger than the water passage capacity of the fixed orifice hole and smaller than the water passage capacity of the sub piston valve.

(Operation) By opening the first pressure release passage, the pressure in the pressure chamber is rapidly released to the secondary side port, so that the flush valve is fully opened and large cleaning is performed.

In addition, by opening the second pressure release passage, the piston moves in the valve opening direction, and the sub-piston valve is kept at a position where it repeatedly opens and closes, that is, at the intermediate opening of the flash valve. Wash.

(Example) An example of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a flash valve according to the present invention.
Is a kind of an angle valve whose flow path is bent at a right angle, and has a primary port 3 as an inlet on one side surface of a valve box 1 and a secondary port 4 as an outlet at a lower part of the valve box. A piston 7 screw-fitted to a valve body 6 abutting on the valve seat 5 is vertically movably accommodated, and an upper lid 9 is attached to the valve box 2 to provide a pressure chamber 8 above the piston 7. To be fitted.

FIG. 2 is a view taken in the direction of the arrow II in FIG. 1, and a manual push valve 10, a first solenoid valve 11 on the lower right side thereof, and a second solenoid valve 12 on the left side thereof are arranged on the front face of the valve box 2. ing.

In the figure, reference numeral 13 denotes a bypass pipe connecting the secondary side of the manual push valve 10 and the secondary side port 4.

The manual push valve 10 is, as shown in FIG.
a, a valve element 10b, and a spring 10c.

In FIG. 1, the valve box 2 has a side opposite to the primary side port 3 bulging outward to form a cavity 14, and the upper part of the cavity 14 communicates with the pressure chamber 8 through a through hole 15. A lower portion of the cavity 14 communicates with the secondary side port 4 through another through hole 16 to form a first pressure release passage 17 including the through hole 15, the cavity 14, and the through hole 16. ing.

The first solenoid valve 11 includes a valve seat 11a, a diaphragm valve element 11b, a spindle 11c, a magnet 11d for maintaining the state of the spindle, and a spring 11e for urging the spindle in a valve closing direction (rightward in the figure). And a solenoid 11f that drives the spindle 11c.

FIG. 3 is a sectional view taken along line III-III of FIG. 2. The second solenoid valve 12 has the same structure as that of the first solenoid valve 11 except for a valve seat 12a, a spindle 12c, and a magnet plate 12d. , A spring 12e and a solenoid 12f.

The valve seat 12a of the second solenoid valve 12 is characterized in that it has an orifice 18 much smaller in diameter than the through hole 16 of the valve seat 11a of the first solenoid valve 11, and as shown in the figure, the upper The hole 15, the cavity 14, and the orifice 18 form a second pressure release passage 19 having a large flow path resistance.

 Next, the configuration of the piston 7 will be described in detail.

In FIG. 1, the lower part of the valve body part 6 integrally connected to the lower part of the piston 7 is smoothly notched for the flow path, and the notches 6a and the straight skirts 6b are alternately arranged.

On the other hand, a fixed orifice hole 20 communicating the primary port 3 and the pressure chamber 8 is formed in the piston 7, and a sub-piston valve 21 is provided in parallel with the fixed orifice hole.

FIG. 4 is an enlarged sectional view of the sub-piston valve, and FIG.
FIG. 5 is a sectional view taken along line V. As shown in FIG. 5, the sub-piston 22, which is the valve element of the sub-piston valve 21, has a square shape, and this sub-piston is fitted in the cylindrical sub-cylinder 7a. There is.

The stem 23 of the sub-piston 22 extends upward, and a longitudinal groove 23a is accurately formed in the middle thereof. This sub piston 2
Reference numeral 2 denotes a packing 24 and a nut 25 with an orifice 25a, which is prevented from falling off.

The operation of the flash valve having the above configuration will be described below.

6 (a) to 6 (e) are explanatory diagrams of the operation. In FIG. 6 (a), the primary port 3 of the flash valve 1 is shown.
When water is supplied to the pressure chamber 8 through the wire mesh strainer 7b on the side surface of the piston 7 and the fixed orifice hole 20, a part of the water fills the cavity 14 through the through hole 15 (the solenoid valves 11, 12). Primary side).

The upper surface 7c of the piston 7 is a large pressure receiving surface, and the lower surface 7d of the flange of the piston 7 is a small pressure receiving surface. Therefore, when the same pressure as the primary port pressure acts on the pressure chamber 8, the downward force prevails in the piston 7, As a result, the valve body 6 is pushed by the valve seat 5, and the flash valve 1 keeps the closed state.

Next, when the toilet user presses the large flush button 26, the first solenoid valve 11 opens (FIG. 6 (b)), and the pressure in the pressure chamber 8 passes through the first pressure release passage 17 to the secondary side. Escape to port 4.

When the pressure in the pressure chamber 8 disappears, the push-up force acting on the lower surface 7d of the flange of the piston becomes effective, the piston 7 and the valve body 6 rise, and the primary port 3 to the secondary port 4 pass through the valve seat 5. A large amount of water flows to This is a large wash.

In FIG. 6 (b), the piston 7 which has reached the upper limit comes into contact with the stroke adjusting screw 9a and stops.
Is relatively depressed by dimension l1.

FIG. 6 (c) is an operation diagram when the sub-piston valve is in the middle open state. Since the sub-piston 22 pushed down by the dimension l1 is separated from the packing 24, water flows as shown by the arrow.

The water flow capacity of each part in FIG. 6 (b) is as follows.

Since the water flow capacity of the first depressurizing passage 17 (100 in the above table) is sufficiently larger than the water flow capacity of the sub piston valve 21 and the fixed orifice hole 20 (20 + 10 = 30 in the above table), the pressure chamber 8 The pressure is not increased, and the flash valve 1 remains fully open.

After the water equivalent to the large flush is provided for flushing the toilet, the first solenoid valve 11 is closed, and a part of the water in the primary port 3 is pressured from both the fixed orifice 20 and the sub-piston valve 21. As it is supplied to the chamber 8, the piston 7 starts to descend rapidly.

When the stem 23 of the sub-piston separates from the upper lid 9 during the lowering, the sub-piston valve 21 closes as shown in FIG. Thereafter, the pressure chamber 8 is replenished with water only from the fixed orifice hole 20, which has a small flow rate, so that the piston 7 descends at a low speed, preventing water hammer and the like.

Next, when the small cleaning push button 27 (FIG. 6 (e)) is pressed,
The second solenoid valve 12 is opened, and the pressure chamber 8 communicates with the secondary port 4 via the second pressure release passage 19 having a large flow path resistance.
The water flow capacity of each part at this time is as follows.

Since the pressure in the pressure chamber 8 is released, the piston 7 rises, and the flush valve 1 starts flowing water (arrow). However, the opening speed of the flash valve 1 is smaller than that of the large cleaning because the resistance of the pressure release passage 19 is large.

While the piston 7 is being raised, the sub-piston valve 21 is in a closed state, and the water in the primary port 3 flows into the pressure chamber 8 exclusively through the fixed orifice hole 20, and this water is The air is discharged to the secondary port 4 through the pressure release passage 19.

When the upper end of the stem of the sub-piston 22 hits the upper lid 9, the sub-piston 22 descends slightly, and the sub-piston valve 21
As shown in FIG. 5D, the stroke is fully opened at the stroke l2.
The full opening here does not mean the magnitude of the stroke of the sub-piston, but means the water-passing capacity of the sub-piston valve 21, and when the longitudinal groove 23a provided in the stem 23 and the orifice 25a coincide with each other (No. 6). Fig. (D)) means that the amount of flowing water is maximized due to the large flow passage area during this period.

Then, the water flow capacity (30 in the above table) of the sub piston valve 21 exceeds that of the second depressurizing passage 19 (20 in the above table),
The pressure in the pressure chamber 8 is increased, and the piston 7 is slightly lowered.

That is, the piston 7 has the sub-piston stem 23
The position of the flash valve 1 is repeatedly finely moved up and down at the position where the flash valve 1 comes in contact.

The middle opening degree can be freely set by changing the length of the stem 23 of the sub-piston.

If the first and second solenoid valves 11 and 12 become inoperable due to a power failure or the like, the water in the pressure chamber 8 is released by pressing the manual push valve 10 (FIG. 1). 2), the piston 7 rises with the water pressure of the primary port 3, and the flash valve 1 is opened.

(Effects of the Invention) As described above, according to the present invention, a large / small washing function can be incorporated in one valve box, so that the equipment space can be reduced, and even if the primary water pressure fluctuates due to the action of the pressure chamber. Since a fixed amount of water can be flowed, an extremely useful flash valve can be provided.

[Brief description of the drawings]

 1 is a sectional view of a flash valve according to the present invention, FIG. 2 is a sectional view taken along line II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. FIG. 5 is an enlarged sectional view, FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIGS. DESCRIPTION OF SYMBOLS 1 ... Flush valve, 2 ... Valve box 3 ... Primary side port, 4 ... Secondary side port 6 ... Valve body part, 7 ... Piston 8 ... Pressure chamber, 11 ... First solenoid valve 12 second solenoid valve 17 first pressure release passage 19 second pressure release passage 20 fixed orifice hole 21 sub-piston valve

Claims (1)

(57) [Claims] A piston connected to a valve body is housed in a valve box having a primary port on one side and a secondary port on a lower surface so as to be movable up and down, and the piston is placed above the piston. A pressure chamber for urging the valve in the valve closing direction by water pressure is provided. The pressure of the primary port acts on the pressure chamber through a fixed orifice hole formed in the piston, and the pressure chamber is connected to the pressure chamber through a pressure release passage. A flash valve connected to the secondary port through a sub-piston valve provided in the piston in parallel with the fixed orifice hole so that the sub-piston valve starts to open at an intermediate position of the flash valve; The passage is composed of at least two systems, each having an electromagnetic valve, and the first depressurizing passage has a water passage capacity larger than the sum of the water passage capacity of the fixed orifice hole and the water passage capacity of the sub-piston valve, , Flush valve characterized in that it is set to smaller than the water flow capability of the sub piston valves in greater than water flow capability of the second depressurizing passage water flow capacity of the stationary orifice.