JP4247741B2 - Washing water supply device - Google Patents

Description

  The present invention relates to a washing water supply device that supplies washing water to a flush toilet, a local washing device, and the like.

  As a conventional washing water supply device, there is a flush valve provided with an opening / closing valve and an electromagnetic valve for controlling opening / closing of the opening / closing valve. The structure is such that a piston part is built in the main body cylinder part so as to be movable up and down, and the piston part makes contact with and separates the valve body from the seat part formed at the lower end of the main body cylinder part, and between the water supply port and the drainage port. An on-off valve that opens and closes the flow path, a pressure chamber provided in the upper part of the piston portion, a small hole (bleed hole) that communicates the pressure chamber and the water supply port, and a communication flow path that connects the pressure chamber and the drain port, The electromagnetic valve for opening and closing the communication channel. Further, a cylinder body in which the piston part is slidably movable is fitted on the piston part and fixed in the main body cylinder part, and a strainer is provided in the cylinder body to surround the outer periphery of the seat part in the fixed state.

  In the pipes of water pipes connected to the water supply port of the flash valve, sand, seal tape for pipe connection, sealing adhesive, etc. may be mixed into the water supply port. When sand or a sealing material is caught in a sliding part such as a bleed hole, the cleaning water flows through the gap generated in the seat part of the electromagnetic valve, so that the on-off valve opens and a large amount of cleaning water flows down. However, in the flush valve, sand and sealing material are captured by the strainer and prevented from entering the bleed hole, so that it is possible to reliably prevent dust from being caught in the seat portion of the solenoid valve. (For example, see Patent Document 1)

Japanese Unexamined Patent Publication No. 07-247586 (page 4, FIG. 1)

  In the washing water supply device of Patent Document 1, a strainer is disposed upstream from the inlet portion of the bleed hole of the on-off valve, and dust such as sand or sealing material from the upstream side of the strainer is disposed on the bleed hole of the on-off valve. Although it has been devised so as not to cause water stoppage due to being caught in the sliding part, dust enters when opening and closing the valve or cleaning the strainer, and dust such as sand and sealant flows downstream from the bleed hole. There is a fear. When dust flows downstream from the bleed hole, it is bitten by the solenoid valve seat or sliding part, which is the pilot flow path, and the pressure chamber and drainage are in communication with each other, creating a fully closed state of the on-off valve The water stoppage is poor without being done.

  Therefore, the present invention includes a pilot type on-off valve and a control valve that controls the opening and closing of the pilot type on-off valve, and captures dust mixed in the flow path when the pilot type on-off valve is assembled or when the strainer is cleaned. It is an object of the present invention to provide a cleaning water supply device that can prevent the seat portion from being bitten by dust and prevent a water stop failure of a pilot type on-off valve.

The invention includes a water inlet, a water outlet, a washing water flow path connecting the water inlet and the water outlet, a valve seat disposed in the middle of the washing water flow path, and abutting and separating from the valve seat. A pilot-type on-off valve having a valve body provided with an elastic body for opening and closing the washing water flow path, a pressure chamber disposed behind the valve body, and a bleed hole communicating with the water inlet and the pressure chamber; A cleaning water supply device comprising: a communication passage that communicates the pressure chamber and the outlet; and a control valve that opens and closes the communication passage. When one strainer is disposed and the mesh size of the first strainer is δ1, and the mesh size of the second strainer disposed in the upstream flow path from the bleed hole is δ2, δ1 ≧ δ2 .

In the present invention configured as described above, the control of the pilot type on-off valve of the washing water supply device is stabilized, and the dust mixed during the assembly of the pilot type on-off valve and the strainer cleaning is captured and the dust on the seat portion of the control valve is captured. It is possible to prevent the occurrence of water stop failure due to biting.
In addition to trapping sand mixed in pipes of water pipes, sealing materials such as sealing tape for pipe connections and sealing adhesives, the first strainer captures minute garbage that cannot be captured by the second strainer. Therefore, it is possible to prevent a large amount of dust from accumulating in the first strainer. In order to capture only the dust that has flowed out during assembly of the cleaning water supply device or cleaning of the second strainer provided in the stop cock, the maintenance interval of the first strainer can be set longer, and the size of the first strainer section can be reduced. Is also planned.

  In the present invention, it is preferable that the communication path is formed integrally with the control valve, and a connecting portion for detachably connecting the control valve and the on-off valve is provided, and the first strainer is arranged in the connecting portion. It is set as the configuration.

In the present invention configured as described above, the first strainer can be easily attached and the first strainer can be easily maintained when the cleaning water supply apparatus is assembled.

  According to the present invention, in a cleaning water supply apparatus including a pilot type on-off valve and a control valve that controls opening and closing of the pilot type on-off valve, dust mixed into the flow path when the pilot type on-off valve is assembled or when the strainer is cleaned. Can be captured and dust biting of the seat portion of the control valve can be prevented, so that the water stop failure of the pilot type on-off valve can be prevented.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. FIG. 1 is an external view of a flush toilet 2 equipped with a cleaning water supply device 1 according to the present invention, and FIG. 2 is a water channel configuration diagram of the cleaning water supply device 1.

  A schematic configuration of the cleaning water supply apparatus 1 will be described with reference to FIG. The washing water supply device 1 includes a water supply port 20 that communicates with a water supply source (not shown) and communicates with a stop cock 3 that guides the washing water to the washing water supply device 1, a water outlet 21 that discharges washing water into the toilet, and a water supply port 20 and the water outlet 21, the constant flow valve 6 disposed on the water supply port 20 side to maintain the cleaning flow rate substantially constant, and the water supply port 20 and the water outlet provided on the secondary side of the constant flow valve 6. The pilot-type on-off valve 7 that opens and closes the cleaning water flow path between the pilot-type on-off valve 21 and the electromagnetic valve 9 that opens and closes the pilot flow-path 8 of the pilot-type on-off valve 7.

  Next, the structure of the washing water supply apparatus 1 will be described from the upstream side of the water supply. 3 is a sectional view of the stop cock 3. FIG. 4 is an external view of the second strainer 10 incorporated in the stop cock 3. FIG. 5 is a sectional view of the valve unit 4. FIG. It is an external view of the 1st strainer 11 incorporated.

  The wash water is connected to a water pipe (not shown) and a water supply joint 12 of the water stop cock 3, and is led from the water supply joint 12 to the water stop cock 3. The stop cock 3 has a top-type valve body 13, and a screw 14 for changing the stroke of the top-type valve body 13 is cut into the stop cock main body 15 and the top-type valve body 13. When the operation part 16 of the valve-type valve element 13 is rotated leftward, the piece-type valve element 13 is separated from the valve seat 19 and the washing water is guided downstream from the piece-type valve element. The washing water that has passed through the top-type valve body 13 is guided to the discharge port 18 of the stop cock body 15 through the second mesher 10 of 60 mesh that is locked to the stop cock lid 17. The washing water led to the discharge port 18 of the stop cock 3 is led to the water inlet 20 of the washing water supply device 1 concealed in the toilet bowl by the flexible water supply pipe 5.

  When cleaning the second strainer 10, the user rotates the operation portion 16 to the right to stop the washing water, rotates the stop cock lid 17 to the left, removes the second strainer 10 and cleans it. Can do. As shown in FIG. 4, the second strainer 10 is formed into a cylindrical shape by welding the end portions of a plate having a plurality of water openings opened in a lattice shape by etching. Compared to a filter that punches and forms a metal plate, the aperture ratio can be increased, and space can be saved from a flat plate strainer by flowing cleaning water from the center of the cylindrical shape toward the outer periphery of the cylinder. Further, the foreign matter captured by the second strainer 10 can be stored in the center of the cylinder, and the cleaning interval of the filter can be set long.

  By providing this second strainer, the sealing material such as sand mixed in the pipes of water pipes, pipe connecting seal tape and seal adhesive used at the time of construction is provided upstream of the pilot on-off valve 7. It captures it so that it does not flow out into a small opening area such as a bleed hole or a seat portion of a control valve. In the present embodiment, the second strainer is provided in the stop cock, but the same effect can be obtained if the second strainer is provided in the flow path upstream from the bleed hole.

  The wash water flowing in from the water inlet 20 is guided to the pilot type on / off valve 7, and the wash water passing through the pilot type on / off valve 7 flows out to the water outlet 21. The pilot type on-off valve 7 includes a diaphragm valve body 22, a pressure chamber 24 having the diaphragm 23 of the diaphragm valve body 22 as a part of a partition wall, a valve seat 25 to which the diaphragm valve body 22 is in close contact with the pressure of the pressure chamber 24, A pilot flow path 8 that communicates the pressure chamber 24 and the water outlet 21 is provided, and an electromagnetic valve 9 that opens and closes the pilot flow path 8 is disposed in the middle of the pilot flow path 8. The diaphragm valve body 22 includes a rubber diaphragm 23, a diaphragm retainer 26 that holds the diaphragm 23, a bleed hole 27 that is a communication path between the water inlet 20 and the pressure chamber 24, and a cleaning that prevents clogging of the bleed hole 27. It consists of pins 28. Further, the cone portion 29 of the diaphragm retainer 26 has a function of fixing the diaphragm 23 to the diaphragm retainer 26 and smoothing the flow to reduce the pressure loss of the pilot on-off valve 7.

The electromagnetic valve 9 is an electromagnetic coil portion 32, a plunger 33, a packing 34 attached to the plunger 33, a spring 35 for urging the plunger 33, a pilot flow path 8a, a valve that is in close contact with the packing 34 and closes the pilot flow path 8a. It consists of a seat 36 and the like.
When not energized, the plunger 33 is biased to the valve seat 36 by the spring 35 and is closed. When a voltage is applied to the electromagnetic coil portion 32, the plunger 33 is pushed against the post 37 against the spring 35 by the electromagnetic force. The valve is opened away from the valve seat 36. When the solenoid valve 9 is opened, the pilot flow path 8 and the water outlet 21 communicate with each other, so that the pressure in the pressure chamber 24 decreases to substantially the same pressure as the water outlet 21, and the balance of the force applied to the diaphragm valve body 22 is lost. The diaphragm valve body 22 is separated from the valve seat 25 and the on-off valve 7 is opened. When the solenoid valve 9 is closed, the pilot flow path 8 is closed, the wash water flows from the water inlet 20 through the bleed hole 27 and flows into the pressure chamber 24, and the pressure in the pressure chamber 24 becomes substantially the same as the pressure in the water inlet 20. The valve body 22 is in close contact with the valve seat 25 and the water outlet 21 is closed.

  The pilot type on-off valve is a differential pressure actuated valve that opens using the feed water pressure, thus reducing drive energy, power consumption of the solenoid valve, and the user's handle operating force (operating torque). Can be reduced. It can be said that this is a preferable configuration as a flush water valve used in a flush toilet that requires a relatively large flow rate (20 L / min or more).

  The same 60 mesh as the second strainer 10 of the stop cock 3 is placed in the middle of the pilot flow path 8 which is a communication path between the pressure chamber 24 of the pilot type on / off valve 7 and the electromagnetic valve 9 which is a control valve of the pilot type on / off valve 7. A first strainer 11 is provided. The first strainer 11 is a disk-shaped plate provided with a plurality of holes, and is produced by press molding. Foreign matters mixed during assembly or cleaning of the second strainer 10 can be captured, and water stoppage failure due to foreign matter biting of the solenoid valve seat portion 30 is prevented.

  Since the mesh of the first strainer is equal to or larger than the mesh size of the second strainer 10 of the stop cock 3, the first strainer 11 does not capture minute foreign matters that cannot be captured by the second strainer 10. A lot of garbage is accumulated in the strainer 11. In order to capture only trash that has flowed out during assembly of the cleaning water supply device 1 or cleaning of the second strainer 10 provided in the stop cock 3, the maintenance interval of the first strainer 11 concealed in the toilet bowl is set to be long. In addition, the first strainer can be reduced in size.

The solenoid valve 9 is incorporated in a pilot flow path component 31 that constitutes a part of the pilot flow path 8, and the pilot on-off valve 7 and the pilot flow path component 31 are detachable and connected by screws or the like. Yes. A cylindrical storage portion 39 for storing the first strainer is provided on the pilot flow path configuration portion 31 side of the connection portion 38 of the pilot type on-off valve 7 and the pilot flow path configuration portion 31. The strainer 11 is stored. By doing so, the first strainer 11 can be easily attached when the cleaning water supply device 1 is assembled. Further, there is an advantage that the first strainer 11 can be easily taken out by separating the pilot type on-off valve 7 and the pilot flow path constituting portion 31 during maintenance.
Moreover, the accommodating part of the 1st strainer 11 can also be provided in the pilot type on-off valve 7 side.

  In the above description, the cleaning water supply device 1 is described as an example applied to a water direct pressure flush toilet 2 as shown in FIG. 1, but can also be applied to residential watering equipment such as a water direct pressure local cleaning device. .

External view of flush toilet equipped with washing water supply apparatus according to the present invention Water channel configuration diagram of cleaning water supply device Cross section of stop cock External view of the 2nd strainer built into the stop cock Sectional drawing of the washing water supply apparatus which concerns on this invention External view of the first strainer incorporated in the pilot flow path of the cleaning water supply apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Washing water supply apparatus 2 ... Flush toilet 3 ... Stop cock 5 ... Water supply pipe 6 ... Constant flow valve 7 ... Open / close valve 8 ... Pilot flow path 8a ... Pilot flow path 9 ... Solenoid valve 10 ... Second strainer
DESCRIPTION OF SYMBOLS 11 ... 1st strainer 12 ... Water supply joint 13 ... Top-type valve body 14 ... Screw 15 ... Stop cock main body 16 ... Operation part 17 ... Stop cock lid 18 ... Discharge port 19 ... Valve seat 20 ... Inlet port 21 ... Outlet port 22 ... Diaphragm valve element 23 ... Diaphragm 24 ... Pressure chamber 25 ... Valve seat 26 ... Diaphragm retainer 27 ... Bleed hole 28 ... Cleaning pin 29 ... Cone part 31 ... Pilot flow path component 32 ... Electromagnetic coil part 33 ... Plunger 34 ... Packing 35 ... Spring 36 ... Valve seat 37 ... Post
38 ... Connection part 39 ... Storage part

Claims (2)

A water inlet, a water outlet, a washing water flow path connecting the water inlet and the water outlet, a valve seat disposed in the middle of the washing water flow path, and abutment and separation from the valve seat to A pilot-type on-off valve having a valve body provided with an elastic body for opening and closing the passage, a pressure chamber disposed behind the valve body, a bleed hole communicating with the water inlet and the pressure chamber, and the pressure In a washing water supply apparatus comprising: a communication passage that communicates a chamber with the water outlet; and a control valve that opens and closes the communication passage.
A first strainer is disposed between the control valve of the communication passage and the pressure chamber ;
A washing water supply apparatus , wherein δ1 ≧ δ2 is satisfied, where δ1 is a mesh size of the first strainer and δ2 is a mesh size of a second strainer disposed in the upstream flow path from the bleed hole .   The communication path is formed integrally with the control valve, and a connecting portion for detachably connecting the control valve and the pilot type on-off valve is provided, and the first strainer is provided at the connecting portion. The cleaning water supply apparatus according to claim 1.