JP3674305B2 - Self-closing faucet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-closing faucet, and more particularly to a self-closing faucet that can reduce the driving force of a pilot valve.
[0002]
[Prior art]
An example of a conventional self-closing faucet having a pilot valve will be described with reference to FIG.
[0003]
The valve body over the main body 14 having an inlet 12, and a sub-body 18 having an outlet 16 and is obtained by connecting via a joint 20, 22 and the union nut 24.
[0004]
The end of the main body 14 is sealed watertight by a head cap 26, and a back pressure chamber 32 is formed between the head end side of the piston main valve 30 disposed in the main body 14 and the head cap 26. Has been. The back pressure chamber 32 and the main flow path primary side 41 upstream of the piston main valve 30 communicate with each other through a small hole 34 provided in the piston main valve 30.
[0005]
The piston main valve 30 is configured such that a seat packing 36 provided on the outer periphery thereof can contact and separate from a main seat portion 38 provided on the main body 14.
[0006]
The back pressure chamber 32 and the main flow path secondary side 42 on the downstream side of the piston main valve 30 communicate with each other via a pilot primary water path 61 and a pilot secondary water path 62. The pilot primary water channel 61 passes through the piston main valve 30, the joints 20 and 22, the sub body 18, and the valve body 64 of the control device 60, and the pilot secondary water channel 62 is provided in the valve body 64 of the control device 60. ing.
[0007]
The control device 60 includes a pilot valve body 64 having the water passages 61 and 62, a pilot valve 68 that contacts and separates from a pilot seat portion 66 provided in the body 64, and a solenoid 70 that advances and retracts the pilot valve 68. And a spring 72 for urging the pilot valve 68 in the valve closing direction, and the pilot valve body 64 is connected to the sub-body 18.
[0008]
In the self-closing faucet configured in this way, in the closed state, the pilot valve 68 is seated on the pilot seat portion 66 as shown, and the pilot primary water passage 61 and the secondary water passage 62 are blocked, The piston main valve 30 is urged downward in the figure by water pressure transmitted to the back pressure chamber 32 through the small hole 34, and the seat packing 36 is pressed against the main seat portion 38, and the main flow path primary side 41 and the main flow path are The secondary side 42 is blocked.
[0009]
When the solenoid 70 is energized and the pilot valve 68 is separated from the pilot seat 66, the water pressure in the back pressure chamber 32 is released to the main flow path secondary side 42 via the pilot primary water path 61 and the secondary water path 62, and the piston The main valve 30 is pushed upward by the feed water pressure, water flows directly from the main flow path primary side 41 to the main flow path secondary side 42, and the self-closing faucet is opened.
[0010]
When energization of the solenoid 70 is stopped in this open state, the pilot valve 68 is seated on the pilot seat portion 66 by the biasing force of the spring 72, and the back pressure chamber 32 and the main flow path 2 through the pilot water channels 61 and 62 are placed. Communication with the next side 42 is eliminated. As a result, water gradually flows into the back pressure chamber 32 through the small hole 34, the piston main valve 30 gradually moves downward, and eventually the seat packing 36 is seated on the main seat portion 38 to be in a plugged state. Return.
[0011]
Although FIG. 2 has a configuration in which the control device 60 has a solenoid 70, there is a self-closing faucet configured to open and close the pilot valve 68 via a manual rod 78 as shown in FIG. Other configurations in FIG. 3 are the same as those in FIG. 2, and each reference numeral indicates the same part as in FIG. 2. In the self-closing faucet of FIG. 3, when the rod 78 is pushed, the pilot valve 68 is opened and the self-closing faucet is opened. When the pressing force of the rod 78 is released, the pilot valve 68 is closed by water pressure (or by the pressing force of a return spring not shown), and the self-closing water faucet is closed.
[0012]
[Problems to be solved by the invention]
In the above conventional self-closing water faucet, when the pilot valve 68 is in the closed state, the feed water pressure on the primary flow path primary side 41 side is piloted through the small hole 34, the back pressure chamber 32, and the pilot primary water path 61. Since it is added to the valve 68, it is necessary to use a spring 72 having a large spring coefficient. In order to overcome the pressing force of the spring and drive the pilot valve 68, it is necessary to use a solenoid 70 having a large capacity. is there.
[0013]
Further, when the pilot valve 68 is manually operated as shown in FIG. 3, the pressing force when the pilot valve 68 is pushed to open is considerably large.
[0014]
As a countermeasure, it is conceivable to provide a pressure reducing valve on the primary side of the main flow path. However, if this is done, the water pressure of the water flowing through the main flow path will be low and the water supply speed will be low.
[0015]
An object of the present invention is to solve such problems, reduce the water pressure applied to the pilot valve without reducing the water pressure in the main flow path, and reduce the pilot valve operation driving force.
[0016]
[Means for Solving the Problems]
The self-closing water faucet of the present invention is disposed in a slidable manner within a valve body having an inlet and an outlet, and forms a back pressure chamber between the head end side and the inner surface of the valve body. A piston main valve, a small hole communicating the primary flow path primary side upstream of the piston main valve and the back pressure chamber, a main flow path secondary side downstream of the piston main valve, and the In a self-closing faucet provided with a pilot water channel communicating with a back pressure chamber and a control device having a pilot valve for opening and closing the pilot water channel, a pressure reducing valve is provided in a pilot primary water channel upstream of the pilot valve. A self-closing faucet provided , wherein the pressure reducing valve is provided in the piston main valve, and the piston main valve is composed of a head part and a barrel part connected to each other, and the pilot primary water channel is From the side surface of the head part, the head It leads to a central part, then through the pressure reducing valve, in which further characterized in that through the barrel parts.
[0017]
In such a self-closing faucet, since the pressure reducing valve is provided in the pilot primary water channel, the water supply pressure applied to the pilot valve is reduced, and the driving force of the pilot valve can be reduced. In addition, since the water pressure of the main flow path does not decrease, the flow rate of the feed water that passes through the self-closing faucet does not decrease.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view of a main body of a self-closing faucet according to an embodiment.
[0019]
In this embodiment, the piston main valve 30A includes a head part 30a and a barrel part 30b that are connected to each other.
[0020]
The pilot primary water channel 61 reaches the center of the head part 30a from the side peripheral surface of the head part 30a, then passes through the pressure reducing valve 80, and further passes through the barrel part 30b.
[0021]
The pressure reducing valve 80 has a piston portion 82 and a nozzle portion 84, and as the water pressure increases, the upward pressing force applied to the piston portion 82 increases, and the tip of the nozzle portion 84 acts on the rubber stopper 86. Approaching, narrowing the passage of the pilot primary water channel 61, the water pressure transmitted downstream from the pressure reducing valve 80 becomes smaller. In the space around the pressure reducing valve 80, the portion above the piston portion 82 communicates with the main flow path secondary side 42 via the pressure release water channel 88. The pressure reducing valve 80 is pressed downward by the return spring 90 in the drawing.
[0022]
The other structure of this self-closing faucet is the same as that of FIG. 2 or FIG.
[0023]
In the self-closing faucet provided with the pressure reducing valve 80 in the pilot primary water channel 61 in this way, the water supply pressure applied to the pilot valve 68 is reduced, so that the control having the solenoid 70 and the spring 72 as shown in FIG. In the case of the device 60, the pressing force of the spring 72 can be reduced, and the capacity of the solenoid 70 can be reduced.
[0024]
Further, when the pilot valve 68 is manually operated as shown in FIG. 3, the pressing force for closing the pilot valve 68 can be reduced. As a result, a remote operation sheath wire cable (not shown) is connected to the rod 78, and the pilot valve can be manually operated remotely.
[0025]
Since the pressure reducing valve 80 is provided in the pilot water channel, and the water pressure in the main flow channels 41 and 42 remains unchanged, the flow rate of the feed water that passes through the self-closing water faucet is sufficiently high.
[0026]
Since in the above embodiment is provided with a reduced-pressure valve 80 to the piston main valve 30A, it is taken out of the piston main valve 30A to open the head cap 26, easily check the pressure reducing valve 80, can be repaired.
[0027]
【The invention's effect】
As described above, the self-closing faucet of the present invention is provided with a pressure reducing valve in the pilot primary water channel, and the feed water pressure applied to the pilot valve is reduced. For this reason, when a control device having a solenoid and a spring is provided, the pressing force of the spring can be reduced, and the capacity of the solenoid can be reduced. Also, when the pilot valve is operated manually, the pilot valve is closed. It is possible to reduce the pressing force when the operation is performed, and it can be configured to be remotely operated manually.
[0028]
The self-closing faucet of the present invention has a sufficiently high flow rate.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main body of a self-closing faucet according to an embodiment.
FIG. 2 is a cross-sectional view of a self-closing faucet according to a conventional example.
FIG. 3 is a sectional view of a self-closing faucet according to another conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Valve body 12 Inlet 14 Main body 16 Outlet 30, 30A Piston main valve 32 Back pressure chamber 34 Small hole 38 Main seat part 41 Main flow path (primary side)
42 Main channel (secondary side)
61 Pilot primary water channel 62 Pilot secondary water channel 66 Pilot seat portion 68 Pilot valve 70 Solenoid 80 Pressure reducing valve 88 Pressure release water channel

Claims (1)

A valve body having an inlet and an outlet;
A piston main valve which is slidably disposed in the valve body and forms a back pressure chamber between the head end side and the inner surface of the valve body;
A small hole communicating the primary flow path primary side upstream of the piston main valve and the back pressure chamber;
A pilot water channel communicating the secondary side of the main channel downstream of the piston main valve with the back pressure chamber;
In a self-closing faucet provided with a control device having a pilot valve for opening and closing the pilot water channel,
A self-closing faucet provided with a pressure reducing valve in a pilot primary water channel upstream of the pilot valve ,
The pressure reducing valve is provided in the piston main valve,
The piston main valve is composed of a head part and a barrel part connected to each other.
The pilot primary water channel extends from the side surface of the head part to the center of the head part, then passes through the pressure reducing valve, and further passes through the barrel part. .

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