JP2000008441A - Flush valve for direct pressure type water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush valve for direct pressure type water closet which is able to shift the amount of water discharge by one touch between urine and feces and moreover the water closet can be easily operated with a low electric power. SOLUTION: When a valve disc 3 is opened, a leak path control valve 17 moves together with the valve disc 3 and contacts a movable iron core 23 of a solenoid 20 and its stop position is able to change whether the movable iron core 23 is absorbed to a fixed iron core 22 or not, and the leak path control valve 17 is able to control the minimum cross sectional area of leak paths 11, 12 in the middle of moving in the closing direction of the valve disc 3. And the time required for fully closing the valve disc 3 is switched in two stages depending upon the presence or absence of an electric current applied to a solenoid 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush valve for a flush toilet.

[0002]

2. Description of the Related Art In a so-called direct-pressure flush toilet which directly discharges water from a water supply pipe to a toilet without temporarily storing the water in a tank, a flush valve operated by a pilot is generally used.

[0003] That is, a pressure regulating chamber is formed at the back of a valve body provided so as to close / open a water discharging pipeline leading to the toilet, and the water discharging pipeline, the pressure regulating chamber, and the downstream of the valve body are formed. When the pilot passage is opened, the valve body opens due to the differential pressure between the pressure in the pressure regulating chamber, which has been reduced to a low pressure in communication with the downstream water discharge pipe, and the upstream water discharge pipe, and the pilot passage is closed. Thereafter, high-pressure water gradually leaks into the pressure regulation chamber from the upstream water discharge pipe via the leak path, and the valve element closes due to the differential pressure between the pressure control chamber and the downstream water discharge pipe. Is

[0004]

However, in the above-described flush valve, the time during which the valve is open is fixed by one operation, and the amount of water discharged cannot be changed. Therefore, there is a waste that the same amount of water as in the large business is flown even in the small business where the amount of water discharged should be small.

In the above-described conventional flash valve, the leak path is divided into a plurality of sections, and one of the leak paths is closed by the leak path control valve while the valve body moves from the open state to the closing direction. In some cases, the closing timing is adjusted with a manual screw so that the amount of discharged water can be varied.

However, since it is not possible to turn the screw one by one every time a small or large use is selected, the mechanism is for setting once at the time of installation in accordance with a use environment such as a water supply pressure. At the same time, the same amount of water was flushed when the small business was used.

Accordingly, an object of the present invention is to provide a flush valve for a direct-pressure flush toilet which can change the amount of water discharged for small use and large use with one touch, and can be easily operated with small electric power. And

[0008]

In order to achieve the above object, a flush valve for a direct pressure flush toilet according to the present invention is provided with a valve body provided so as to close / open a water discharge pipe leading to the toilet. A pressure regulating chamber is formed in the back part, and a downstream / water discharge pipe downstream of the valve body communicates with the pressure regulating chamber.
An openable pilot passage, and a leak passage for communicating the upstream water discharge pipe upstream of the valve element with the pressure regulating chamber are provided, and when the pilot passage is opened, it communicates with the downstream water discharge pipe. After the valve body opens due to the differential pressure between the pressure in the pressure regulating chamber that has become low and the pressure in the upstream water discharge pipe, and the pilot passage is closed, the upstream side through the leak passage is closed. A direct-pressure flushing system in which the valve moves in the closing direction due to a differential pressure between the pressure regulation chamber and the downstream water discharge pipe where the pressure rises due to the high pressure water gradually leaking from the water discharge pipe. In the flush valve of the toilet bowl, when the valve element is opened, it moves together with the valve element and contacts the movable iron core of the solenoid, and the stop position changes depending on whether or not the movable iron core is attracted to the fixed iron core. The valve body moves in the closing direction. A leak path control valve for controlling the flow path minimum cross-sectional area of the leak path in the middle of the operation, so that the time required for closing the valve body is switched between two stages depending on whether or not the solenoid is energized. It is characterized by.

It is to be noted that the leak path is divided into a plurality of sections, and one of the leak paths is closed by the leak path control valve while the valve body moves in the closing direction from the open state. It may be.

In this case, the timing at which the leak path control valve closes one of the leak paths while the valve body is moving from the open state to the closing direction is determined by the leak path control when the valve body is opened. It may be changed according to the stop position of the valve.

Further, when the movable iron core is pressed against the fixed iron core by a biasing means, and when the solenoid is energized, the movable iron core is pushed by the leak path control valve. When the movable iron core does not move from the position adsorbed on the fixed iron core and is not energized to the solenoid, the movable iron core is pushed by the leak path control valve so that the movable iron core is pressed by the stopper at a position away from the fixed iron core. You may move until it contacts.

In this case, the position of the stopper may be adjustable, and the position of the suction surface of the fixed iron core on which the movable iron core is sucked may be adjustable. .

[0013] In addition, the leak path may be provided in a plurality of parts, and an electromagnetically actuated valve for closing one of the leak paths while the valve body moves from the open state to the closing direction may be provided. The timing for closing the leak path may be changed depending on whether the valve is energized, and the time required for closing the valve may be switched in two stages.

[0014]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a flush valve of a direct-pressure flush toilet, in which a water discharge pipe line 1 for discharging water sent from an upstream water supply pipe (not shown) to the toilet is bent at a right angle on the way. I have.

A valve seat 2 made of an annular rubber material is disposed on an inner peripheral surface of the portion, and a valve body 3 slidably contacting the valve seat 2 is disposed so as to be able to advance and retreat in the axial direction. . The water discharge pipe 1 upstream of the valve seat 2 is connected to the upstream water discharge pipe 1.
a, and the downstream side of the valve seat 2 is referred to as a downstream water discharge pipeline 1b.

A large split 3a (or opening) is formed in the wall portion of the valve body 3 which is in sliding contact with the valve seat 2. However, when the valve body 3 is moved all the way downstream, the valve body 3 The flange 3b is pressed against the valve seat 2, and the water discharge pipe 1 is closed.

When the valve element 3 is moved so that the split 3a opens upstream of the valve seat 2 (see FIG. 2 and the like), the upstream water discharge pipe 1a and the downstream water discharge pipe 1 1b is communicated, and water is discharged to a toilet (not shown).

The valve body 3 is formed by integrally joining two cylindrical parts together.
A pressure regulating chamber 5 is formed at the back of the valve body 3 which is separated from the internal space.

A cylinder portion 6a, into which the valve body 3 is slidably fitted, is formed in a deep portion of the lid member 6 that blocks between the outside and the pressure regulating chamber 5, and its sliding surface is formed. A moving seal member 7 for sealing is attached to and disposed on the outer peripheral side of the valve body 3.

Reference numeral 8 denotes a pilot passage for directly communicating the inside of the pressure regulating chamber 5 with the downstream water discharge pipe 1b, and an electromagnetic valve 9 capable of closing / opening the pilot passage 8 is interposed in the middle thereof. ing. The solenoid valve 9 is of a normally closed type that closes the pilot passage 8 in an off state. However, a manual valve may be provided instead of the solenoid valve 9.

The valve body 3 has first and second leak holes 11, which directly communicate the inside of the pressure regulating chamber 5 and the inside of the upstream water discharge pipe 1a.
12 are formed. Although the minimum cross-sectional area of each of the flow paths of the leak holes 11 and 12 is formed much smaller than the pilot passage 8, the first leak hole 11 is several times as large as the second leak hole 12. It is formed to a large extent.

A filter 13 is mounted on the outer periphery of the valve body 3 at the inlet from the upstream water discharge pipe 1a to the first and second leak holes, and the leak holes 11, 12 are filled with dust. It does not cause clogging.

In the passage between the first leak hole 11 and the pressure regulating chamber 5, a flat plate-like leak path valve seat 15 is attached to the valve body 3 with a holding nut. When the leak path valve body 17a comes into contact with the first leak hole 11 side, the first leak hole 11 is closed (see FIG. 3 and the like). In other states, the first leak hole 11 is in the pressure regulating chamber. 5
And the upstream water discharge pipeline 1a.

The leak path valve element 17a is arranged so as to be freely movable in a certain range in the axial direction. A rod 17b is integrally connected to the leak path valve body 17a on the same axis, and the leak holes 11, 1
Leakage path control valve 1 for controlling minimum cross-sectional area of flow path 2
7 is formed by the leak path valve element 17a and the rod 17b.

Reference numeral 20 denotes a solenoid which is operated by energizing an electromagnetic coil 21, and a fixed iron core 22 is screwed and connected to the lid member 6. A is the screw portion. Therefore, if the fixed iron core 22 is screwed with respect to the lid member 6, the entire solenoid 20 including the end face position of the fixed iron core 22 moves in the axial direction with respect to the lid member 6, the valve element 3, and the like.

Then, as shown in FIG. 7 showing the VII-VII cross section, the first manual rotary ring 18 connected to the fixed iron core 22 by an angular cross section elastically protrudes inward. A claw 18a is formed, and its tip is engaged with and disengaged from a groove 6c formed on the outer peripheral surface of the cylindrical portion 6b of the lid member 6.

Returning to FIG. 1, the protruding end 6s of the cylindrical portion projecting from the central portion of the lid member 6 into the pressure regulating chamber 5 is used when the valve body 3 is separated from the valve seat 2 and opened to the maximum. It is a valve opening stopper that contacts.

The movable iron core 23 of the solenoid 20 is formed thin so as to reduce the moment of inertia, and is always in contact with a stopper 25 arranged at a predetermined distance from the outer end surface of the fixed iron core 22. It is urged by a weak compression coil spring 24 so as to make contact.

A through hole is formed at an axial position of the fixed iron core 22, and a rod 17b of the leak path control valve 17 is inserted therein so as to be able to move forward and backward. And can reach the movable iron core 23 side.

The stopper 25 is screwed to a fixed cylindrical portion 26 of the solenoid 20. When the stopper 25 is screwed with respect to the fixed cylindrical portion 26, the end face position of the stopper 25 is fixed to the fixed iron core 22 or the like. Move in the axial direction.

Then, as shown in FIG. 8 showing a VIII-VIII section, the second manually rotating ring 27 connected to the stopper 25 by an angular section has a claw 27a elastically projecting inward. Is formed, and the tip thereof is fixed cylinder portion 2
6 is elastically pressed against the outer peripheral surface of the hexagonal head 26a.

Next, the operation of the flash valve of the above embodiment will be described. When the flush toilet is not used, as shown in FIG.
Are both turned off, and the pilot passage 8 is closed. The inside of the pressure regulation chamber 5 is connected to the upstream water discharge pipe la via the leak holes 11 and 12 and has a high pressure.

Therefore, the valve body 3 is pressed against the valve seat 2 and closed by the pressure difference between the pressure in the pressure regulating chamber 5 acting on the valve body 3 and the pressure in the downstream water discharge pipe 1b. No spouting is performed.

When performing large-scale water discharge, the solenoid 20
The solenoid valve 9 is turned on while the pilot passage 8 is turned off.
Is opened. Then, since the pressure in the pressure regulating chamber 5 is reduced by communicating with the downstream water discharge pipe 1b via the pilot passage 8, the upstream water discharge pipe 1a acting on the valve element 3 as shown in FIG. Due to the differential pressure between the internal pressure and the pressure in the pressure regulating chamber 5, the valve element 3 is opened from the valve seat 2 to the position where the valve element 3 separates from the valve seat 2 and comes into contact with the valve opening stopper 6s. Water flows into the water discharge pipe line 1b, and water is discharged to the toilet.

In this state, the leak path valve element 17a
, A differential pressure between the high pressure from the upstream water discharge pipe line 1a through the first leak hole 11 and the low pressure from the pressure regulating chamber 5 side acts. Rod 17b
Is pushed into the solenoid 20 side, and the rod 17b contacts the movable iron core 23.

Since the movable iron core 23 is not attracted to the fixed iron core 22, the rod 17b moves to a position where the rod 17b hits the movable iron core 23 in a state of contact with the stopper 25 and stops. In that state, the leak path valve element 17a
Is set to be slightly away from the leak path valve seat 15.

The solenoid valve 9 is turned off immediately. Then
The pilot passage 8 that connects the inside of the pressure regulation chamber 5 with the downstream water discharge pipe 1b is closed, and the first and second
High-pressure water flows in from the upstream water discharge pipe line 1a through the leak holes 11 and 12 of FIG.

As a result, the pressure in the pressure regulating chamber 5 gradually increases, so that the pressure difference between the pressure in the pressure regulating chamber 5 acting on the valve body 3 and the downstream water discharge pipe 1b causes the valve body 3 to move. Start moving in the closing direction.

Then, as shown in FIG. 3, the leak path valve seat 15 comes into contact with the leak path valve body 17a when the valve body 3 slightly moves, and the first leak hole 11 is closed. become.

During this time (ie, from the state shown in FIG. 2 to the state shown in FIG. 3), the minimum cross-sectional area of the communication passage for communicating the upstream water discharge pipe line 1a with the inside of the pressure regulating chamber 5 is set. Is the sum of the cross-sectional areas of the first and second leak holes 11 and 12, so that the valve element 3 moves at a relatively high moving speed.

Thereafter, the minimum sectional area of the communication passage connecting the upstream water discharge pipe line 1a and the inside of the pressure regulating chamber 5 is only the sectional area of the second leak hole 12, so that the moving speed of the valve body 3 4. Finally, as shown in FIG. 4, the flange 3b of the valve body 3 comes into contact with the valve seat 2 and the water discharge pipe 1 is completely closed.

On the other hand, when performing small water discharge, the electromagnetic valve 9 is turned on while the solenoid 20 is turned on by energizing the electromagnetic coil 21. Therefore, when the user presses a small button (not shown), the solenoid valve 9 and the solenoid 2 are pressed.
It is preferable that the wiring be performed so that both 0 are turned on and only the solenoid valve 9 is turned on when the large button is pressed.

As shown in FIG. 5, when the solenoid valve 9 is turned on, the pilot passage 8 is opened, whereby the pressure in the pressure regulating chamber 5 communicating with the downstream water discharge pipe 1b decreases, and the valve body 3 is turned off. It is opened to the maximum distance from the valve seat 2 to a position where it comes into contact with the valve opening stopper 6s, and water is passed from the upstream water discharge pipe 1a to the downstream water discharge pipe 1b. This is the same as the case of the above-mentioned heavy water discharge.

However, since the solenoid 20 is turned on, the movable iron core 23 is attracted to the end face of the fixed iron core 22 against the urging force of the compression coil spring 24 by the electromagnetic force. Therefore, the rod 17b of the leak path control valve 17 stops at the position where it comes into contact with the movable iron core 23, and cannot move any further.

As a result, as shown in FIG.
Is fully opened, the leak path valve element 17a of the leak path control valve 17 stops at a position farther from the leak path valve seat 15 than in the case of the large water discharge shown in FIG.

Therefore, as shown in FIG. 6, the reason that the leak path valve seat 15 abuts on the leak path valve body 17a and the first leak hole 11 is closed is that the state shown in FIG. After the valve body 3 has moved extra compared to the case of water discharge for water use, the pressure regulating chamber 5 and the upstream water discharge pipe line 1a are in communication with each other only through the second leak hole 12, and the valve is opened. The body 3 moves slowly to the fully closed state.

In other words, in the case of small water discharge, the first and second
Since both the leak holes 11 and 12 are open and the range in which the valve body 3 moves in the closing direction at a high speed is longer than that in the case of large use, the time required from when the valve body 3 is opened until it is completely closed. It is short, and the amount of water discharged is smaller than in the case of large water discharge.

In this manner, the time required from opening to closing of the valve body 3 can be switched between two stages depending on whether or not the solenoid coil 20 is energized to the solenoid coil 21. Can be selected by the user with one touch.

Further, in the flush valve of the direct-pressure flush toilet according to this embodiment, it is not necessary to suck the valves by the solenoid 20 and the movable iron core 23 in contact with the fixed iron core 22 is electromagnetically actuated. Therefore, the switching control can be performed by the very small and low power consumption solenoid 20.

It should be noted that the water discharge adjustment for each of the large and small
Can be done manually independently. That is, by screwing the stopper 25 by the second manual rotating ring 27 shown in FIG. 1, the stop position of the rod 17b at the time of large-scale water discharge can be changed, and the water discharge amount can be adjusted. The hexagonal head 26 of the fixed cylindrical portion 26
The position can be set by selecting a position to be engaged with the outer peripheral surface of a.

Further, if the fixed iron core 22 is screwed by the first manual rotating ring 18, the rod 17b at the time of small water discharge can be used.
Can be adjusted to adjust the water discharge amount, and the position where the claw 18a of the first manual rotating ring 18 engages with the groove 6c of the lid member 6 can be selected and set.

Although the solenoid 20 and the leak path control valve 17 in the above embodiment can be called electromagnetically actuated valves in a broad sense, the present invention is not limited to the above embodiment, The large and small water discharge amount control may be performed using an electromagnetic valve or the like in which the path control valve 17 is directly operated by the movable iron core 23.

[0053]

According to the present invention, the time required for the valve body to close can be switched between two stages depending on whether or not the solenoid is energized. You can choose.

Further, there is no need to suction the valves by the solenoid, and it is only necessary to switch whether or not the movable iron core is attracted to the fixed iron core by electromagnetic force. Therefore, the switching is performed by a very small solenoid with low power consumption. Control can be realized.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a flash valve according to an embodiment of the present invention when it is not used.

FIG. 2 is a vertical cross-sectional view of the flash valve according to the embodiment of the present invention in a state where the large-size water discharge is in progress.

FIG. 3 is a vertical cross-sectional view of the flash valve according to the embodiment of the present invention in a state where the large-size water discharge is in progress.

FIG. 4 is a vertical cross-sectional view of the flush valve according to the embodiment of the present invention in a state where water discharge is completed.

FIG. 5 is a vertical cross-sectional view of the flash valve according to the embodiment of the present invention in a state in which small flush water is discharged.

FIG. 6 is a longitudinal sectional view of the flush valve according to the embodiment of the present invention in a state in which small flush water is being discharged.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 water discharge pipe 1a upstream water discharge pipe 1b downstream water discharge pipe 2 valve seat 3 valve body 5 pressure regulating chamber 8 pilot passage 11,12 leak hole 15 leak path valve seat 17 leak path control valve 17a leak path valve body 17b Rod 18, 27 Manual rotating ring 20 Solenoid 22 Fixed iron core 23 Movable iron core 25 Stopper

[Procedure amendment]

[Submission date] June 29, 1998 (1998.6.2
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 4

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

The movable iron core is urged by an urging means in a direction away from the fixed iron core. When the solenoid is energized, the movable iron core is actuated by the leak path control valve. Even when pressed, it does not move from the position adsorbed on the fixed iron core, and when the solenoid is not energized, the movable iron core is at a position separated from the fixed iron core by the urging force of the urging means. You may make it move until it contacts a stopper.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hisaju Hirota 1211-4 Nukuda-cho, Hachioji-shi, Tokyo F-term in T-K Co., Ltd. (Reference) 2D039 BB00 BB06 DA05

Claims (7)

[Claims] 1. A pressure regulating chamber is formed at the back of a valve provided so as to close / open a water discharge pipe leading to a toilet.
A pilot passage that can freely close and open the downstream water discharge pipe downstream of the valve element and the pressure regulating chamber, and a leak that communicates the upstream water discharge pipe upstream of the valve element and the pressure control chamber. When the pilot passage is opened, the valve body is opened due to a pressure difference between the pressure in the pressure regulating chamber, which is low in communication with the downstream water discharge pipe, and the pressure in the upstream water discharge pipe. Is opened, and after the pilot passage is closed, after the high-pressure water gradually leaks in from the upstream water discharge pipe through the leak path, the pressure rises, and the pressure regulation chamber and the downstream water discharge pipe increase in pressure. In a flush valve of a direct-pressure flush toilet in which the valve body moves in the closing direction due to a pressure difference between the valve body and the valve body, when the valve body opens, the valve moves together with the valve body and abuts the movable iron core of the solenoid, The movable iron core is adsorbed on the fixed iron core The stop position changes depending on whether or not the valve body is provided with a leak path control valve for controlling the flow path minimum cross-sectional area of the leak path in the middle of the movement of the valve body in the closing direction. A flush valve for a direct-pressure flush toilet, characterized in that the required time is switched in two stages depending on whether or not the solenoid is energized. 2. The leak path is divided into a plurality of sections, and one of the leak paths is closed by the leak path control valve while the valve body moves from the open state to the closing direction. Item 7. A flush valve for a direct-pressure flush toilet according to Item 1. 3. The timing at which the leak path control valve closes one of the leak paths while the valve element moves from the open state to the closing direction is determined by the timing at which the leak path control valve is opened when the valve element is opened. 3. The flush valve according to claim 2, wherein the flush valve changes depending on a stop position of the flush toilet. 4. The movable iron core is pressed against the fixed iron core by a biasing means, and when the solenoid is energized, the movable iron core is pushed by the leak path control valve. It does not move from the position adsorbed on the fixed iron core,
4. When the solenoid is not energized, the movable iron core moves by being pushed by the leak path control valve until the movable iron core comes into contact with a stopper located away from the fixed iron core. Flush valve of direct pressure flush toilet. 5. The flush valve according to claim 4, wherein the position of the stopper is adjustable. 6. A flush valve for a direct-pressure flush toilet according to claim 4, wherein a position of an adsorbing surface of said fixed iron core on which said movable iron core is adsorbed is adjustable. 7. A pressure regulating chamber is formed at the back of a valve provided so as to close / open the water discharge conduit leading to the toilet.
A pilot passage, which is openable and closable, for communicating the downstream water discharge pipe downstream of the valve element with the pressure regulation chamber, and a leak for communicating the upstream water discharge pipe upstream of the valve element with the pressure regulation chamber. When the pilot passage is opened, the valve body is opened due to a pressure difference between the pressure in the pressure regulating chamber, which is low in communication with the downstream water discharge pipe, and the pressure in the upstream water discharge pipe. After the pilot passage is closed and the high-pressure water gradually leaks in from the upstream water discharge pipe through the leak path, the pressure rises, and the pressure regulation chamber and the downstream water discharge pipe increase in pressure. In a flush valve of a direct-pressure flush toilet in which the valve body moves in a closing direction due to a pressure difference between the valve body and the valve body, the leak path is divided into a plurality of parts, and the valve body moves from an open state to a closing direction. The above leak on the way An electromagnetic valve that closes one of the paths is provided, and the timing of closing the leak path changes depending on whether the electromagnetic valve is energized or not, and the time required for closing the valve is cut in two steps. A flush valve for a direct-pressure flush toilet characterized by being replaced.