JP4152875B2 - Water hammer relief faucet device - Google Patents

Description

  The present invention relates to a faucet device that has a valve that can be opened or closed manually or by an electromagnetic solenoid, and relates to a faucet device that performs water supply and water supply stop according to an operation, and more particularly to a water faucet device that does not cause water hammer due to opening and closing.

A battery-driven faucet device has been provided as a faucet for installing in an existing urinal and automatically supplying water. An example of this type of faucet device is shown in FIG. FIG. 5A shows the open state, and FIG. 5B shows the closed state.
As shown in FIG. 5, the pressure chamber 104 behind the diaphragm, the secondary drainage channel 102, and the plate portion of the diaphragm valve 103 provided between the primary water supply channel 101 and the secondary drainage channel 102 A water passage 105 is provided, and the water passage 105 is opened and closed by a pilot valve 106. The pilot valve 106 opens and closes when the plunger 107 moves up and down.

  Here, when the water flow path 105 is closed by the pilot valve 106 and the water flow through the valve is stopped, the water flow is stopped rapidly, and thus water hammer is likely to occur. A water hammer propagates through a pipeline and may be accompanied by a loud sound.

  6A and 6B, a piston valve 203 is provided between the primary water supply channel 201 and the secondary drainage channel 202, and the pressure chamber 204 of the piston valve 203 and the secondary drainage channel 202 are provided. In some cases, a water passage 205 connecting the two is opened and closed by a pilot valve 206 provided outside. The water hammer phenomenon occurs in this piston valve as well.

  In order to eliminate such a water hammer phenomenon, the time required for the diaphragm valve to close can be adjusted by the ratio of the diameter of the hole opened and closed by the pilot valve and the diameter of the orifice connecting the pressure chambers of the diaphragm valve. Is known.

  However, these hole diameters cannot be determined only by countermeasures against water hammer. The hole diameter of the pilot valve is designed to be approximately 1.0 mmφ based on the range of water pressure to be used and the battery life as a circuit power source for driving the plunger. The diameter of the orifice is often set to 0.5 mmφ in consideration of clogging of dust or components contained in water. Water hammer is likely to occur at this hole diameter ratio.

  On the other hand, some piston valves are incorporated in the main body of the flush valve, and in such a case, the water hammer phenomenon does not matter.

  However, there is a problem that the entire apparatus cannot be configured compactly. That is, as a result of providing a drainage channel outside the main body of the flush valve for opening the valve seat portion of the pilot valve and draining the pressure chamber, the dimensions increase.

  The present invention has been made in consideration of the above points, and an object thereof is to provide a faucet device that does not cause a water hammer phenomenon while using a diaphragm valve.

In order to achieve the above object, in the present invention,
Claim 1
Diaphragm valve that opens and closes between the primary water supply channel and the secondary drainage channel to which water having a predetermined water pressure is supplied to stop water supply and water supply, a pressure chamber provided behind the diaphragm valve, depending on the operation the have a pilot valve for opening and closing the diaphragm valve by by adjusting the pressure in the pressure chamber exerting a pressure of the primary water supply passage by opening and closing Te, and the second drainage path and the pressure chamber The pilot valve is provided with a water passage provided with the pilot valve in the middle and water pressure change mitigating means for gently passing water through the pressure chamber and slowly changing the water pressure in the pressure chamber. The water pressure in the pressure chamber is reduced by the above, the valve body of the diaphragm valve is moved by the water pressure in the primary water supply channel, the valve is opened, and the water pressure in the pressure chamber is increased by closing the pilot valve. In the faucet device in which the valve body of the diaphragm valve is moved by the water pressure of the pressure chamber to close the valve , the water pressure change mitigating means includes an orifice provided in the valve body of the diaphragm valve, and the orifice And a pin that is provided in the faucet device main body and that moves in and out of the orifice in accordance with the movement of the diaphragm valve and changes the cross-sectional area of the orifice. A faucet device characterized by slowing the pressure change of
And the orifice in the faucet device according to claim 1, wherein the side into which the pin is inserted has a large diameter and the opposite side has a small diameter.
Is to provide.

  Since the present invention is configured to slow down the pressure change in the pressure chamber provided adjacent to the diaphragm valve as described above, it is possible to effectively suppress the occurrence of water hammer when the faucet is opened and closed.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment

  FIG. 1 is a longitudinal sectional view showing the internal structure of an embodiment of the present invention. This embodiment is a faucet device using a diaphragm valve, and is arranged between a primary water supply channel on the right side of the figure and a secondary drainage channel on the lower side of the figure. In order to supply or stop the water supplied from the primary water supply channel to the secondary drainage channel, a diaphragm valve at the upper center of the figure is provided, and the opening / closing control of the diaphragm valve is performed at the lower center of the figure. The configuration is performed by a certain pilot valve. The pilot valve is of a latching type driven by a solenoid, and the solenoid is driven by an open / close control circuit that uses a battery as a power source and responds to a signal of a sensor that senses a human hand.

  In FIG. 1, the sensor 1 is provided on the left side of the center in the figure, and the control circuit 3 operates the latching solenoid 2 by the output signal of the sensor 1 to move the plunger 5 in the vertical direction in the figure. When the plunger 5 is pulled up, the pilot valve 6 is opened, and when the plunger 5 is pulled down, the pilot valve 6 is closed.

  The pilot valve 6 is provided in the middle of a secondary drainage channel (not shown) communicating with a pressure chamber 7 provided adjacent to the upper part of the diaphragm valve 4. When the pilot valve 6 is opened, the pressure in the pressure chamber decreases to reduce the pressure applied to the diaphragm valve 4, and the valve is opened by pushing up the diaphragm valve 4 by the pressure of the primary water supply channel. Next, when the pilot valve 6 is closed, water in the primary water supply channel is sent to the pressure chamber 7 through an orifice (described later) provided in the diaphragm valve 4 to increase the pressure in the pressure chamber 7, and the diaphragm valve 4 is moved downward in the figure. Close the valve by pushing down.

  The pressure chamber 7 is divided into two upper and lower chambers by a partition frame, and a substantially disk-shaped buffer plate 8 is provided in the upper chamber. The buffer plate 8 is given a pressing force directed downward in the figure by a coil spring provided at the upper portion, is always pressed against the partition frame, and is in contact with the packing via the packing.

  When the pilot valve 6 is opened and the secondary drainage channel is opened, the pressure in the pressure chamber 7 is reduced and water is supplied to the pressure chamber 7 from the primary water supply channel, and the buffer plate 8 resists the urging force. As a result of being pushed upward in the figure, water flows through the outer periphery of the buffer plate 8 to the secondary drainage channel. At this time, the diaphragm valve 4 also has the pressure of the water in the primary water supply channel prevailed by the pressure in the pressure chamber 7 being lowered, and is pushed upward in the figure to open the valve.

  In FIG. 1, a battery storage chamber 9 is provided in the upper part of the figure, and a check valve 10 is provided in the lower part of the figure.

  FIG. 2 shows the appearance of the embodiment shown in FIG. This embodiment is a water supply device for automatic opening, and is replaced with, for example, an existing manual faucet. And if it arrange | positions a sensor to the front side and it detects that the person stood in the predetermined position, it will be used for opening and closing a faucet and flowing water with it.

  FIG. 3 is an enlarged view of the main part of the embodiment of FIG. 1 and shows the open state. In this case, the diaphragm valve 4 rises and is separated from the valve seat, and the water supplied from the water supply pipe IN passes through the primary water supply path and hits the lower surface of the diaphragm valve 4 and climbs over the valve seat to lower the center of the figure. It flows to the discharge channel OUT through the secondary drainage channel.

  Here, when looking at the valve body of the diaphragm valve 4, an orifice 11 is provided on the left side of the drawing, and a pin 12 is disposed so as to penetrate the orifice 11. The orifice 11 penetrates the diaphragm valve 4 in the thickness direction, and the lower end in the figure has a large diameter and the upper end has a small diameter. The pin 12 has an outer diameter smaller than that of the small-diameter portion of the orifice 11, and the base portion is formed as a coil spring. The base portion is embedded in the water supply apparatus main body.

  As a result, when the diaphragm valve 4 is raised as shown in the figure, the gap between the orifice 11 and the pin 12 is large, so the amount of water flowing through the orifice 11 is large, but the diaphragm valve 4 is lowered. And this gap becomes smaller and the amount of water flow decreases. The orifice 11 is provided with a filter 13 at the water inlet from the primary water supply path, considering that the orifice 11 is easily clogged even at a large diameter portion.

  Water entering the lower pressure chamber 7b from the orifice 11 passes through the outer periphery of the buffer plate 8a rising at this time, enters the upper pressure chamber 7a, and is discharged through the water passage P1, the pilot valve 6, and the water passage P2. 14 and merges with water from the primary water supply channel.

  Here, the discharge port 14 has a structure in which the flow of water that has dropped vertically is changed to a horizontal direction to make a gentle flow.

  FIG. 4 is an enlarged view of the main part of the embodiment of FIG. 1, and shows a closed state. That is, the pilot valve 6 and the diaphragm valve 4 are closed, and the water from the primary water supply channel does not reach the secondary drainage channel.

  However, since water slightly flows into the pressure chamber 7 through the orifice 11 provided in the diaphragm valve 4, the inside of the pressure chamber 7 is kept at substantially the same pressure as the primary water supply channel. At this time, the buffer plate 8a is pressed against the partition frame via the packing 8b by the urging force of the coil spring 8b, and the pressure chamber 7a and the water passage P1 are separated from each other. The water passages P1 and P2 are separated from each other by a closed pilot valve 6.

  Switching between the open state of FIG. 3 and the closed state of FIG. 4 is the opening and closing of the pilot valve 6. The operation of the pilot valve 6 is performed by raising and lowering the plunger 5 biased in the downward direction by a coil spring incorporated in the upper part. The plunger 5 includes an electromagnetic coil 2a and a permanent magnet 2b. When the magnetic pole of the plunger 5 is switched by instantaneous energization of the electromagnetic coil 2a, the plunger 5 cooperates with the permanent magnet 2b fixed to the casing of the solenoid 2. Hold the raised or lowered position. In addition, the resin coating film 2c for rust prevention is provided in the outer periphery of the casing.

  Assume that the plugged state in FIG. 3 is switched to the plugged state in FIG. For this purpose, the electromagnetic coil 2a is energized to switch the magnetized state of the plunger 5 and lowered, and the pilot valve 6 closes the inlet of the water passage P2.

  Thereby, since the pressure chamber 7 and the water flow path P1 are cut off from the water flow path P2, the internal pressures of the pressure chambers 7a and 7b rapidly increase and become uniform. Then, the buffer plate 8a comes into contact with the partition frame by the urging force of the coil spring 8b.

  As a result, the diaphragm valve 4 is given substantially the same pressure on the upper and lower sides of the body, and since the elastic restoring force and its own weight of the valve body itself are applied thereto, the valve body starts to descend. And when a valve body seats on a valve seat, it will be in a valve closing state.

  As this valve closing operation proceeds, water flows into the pressure chamber 7 through the orifice 11 as the valve body descends. Here, a pin 12 is combined with the orifice 11, and the pin 12 is inserted into the orifice 11 provided in the valve body as the valve body is seated. Since the orifice 11 has a large diameter at the lower part and a small diameter at the upper part, the gap between the orifice 11 and the pin 12 becomes smaller when the valve is closed and the insertion degree of the pin 12 is increased. And the amount of water passing through the orifice 11 decreases.

  By passing water through the orifice 11, the degree of pressure decrease in the pressure chamber 7 when the valve is closed is alleviated. For this reason, when the valve is closed, the time until the valve body comes into contact with the valve seat is extended, and the pressure change is relieved accordingly. As a result, water hammer that may occur in the water channel connected to the primary water supply channel and the secondary drainage channel is prevented.

(Modification)
In the above-described embodiment, the faucet having an electromagnetic drive mechanism has been described. However, the water hammer phenomenon can be applied to a water hammer countermeasure that can be rapidly opened and closed such as a lever-type water faucet.

Explanatory drawing which shows the structure of one Example of this invention. The figure which shows the external appearance of the Example shown in FIG. FIG. 1 is an enlarged view of a main part of the embodiment shown in FIG. 1, showing a valve open state. FIG. 1 is an enlarged view of a main part of the embodiment shown in FIG. 1, showing a valve closed state. An example of a conventional water supply apparatus is shown, FIG. 5 (a) shows a valve open state, and FIG. 5 (b) shows a valve closed state. The other example of the conventional water supply apparatus is shown, Fig.6 (a) shows a valve opening state, FIG.6 (b) shows a valve closing state.

Explanation of symbols

1 Sensor 2 Latching solenoid 2a Electromagnetic coil 2b Permanent magnet
2c Resin coating 3 Control circuit 4 Diaphragm valve 5 Plunger 6 Pilot valve 7 Pressure chamber 8 Buffer plate 9 Battery chamber 10 Check valve 11 Orifice 12 Pin 13 Filter 14 Discharge port P1, P2 Water passage 101 Primary side water supply passage 102 Secondary Side drainage channel 103 Diaphragm valve 104 Pressure chamber 105 Water flow channel 106 Pilot valve 107 Solenoid 201 Primary side water supply channel 202 Secondary side drainage channel 203 Piston valve 204 Pressure chamber 205 Water flow channel 206 Pilot valve

Claims (2)

Diaphragm valve that opens and closes between the primary water supply channel and the secondary drainage channel to which water having a predetermined water pressure is supplied to stop water supply and water supply, a pressure chamber provided behind the diaphragm valve, depending on the operation the have a pilot valve for opening and closing the diaphragm valve by by adjusting the pressure in the pressure chamber exerting a pressure of the primary water supply passage by opening and closing Te, and the second drainage path and the pressure chamber The pilot valve is provided with a water passage provided with the pilot valve in the middle and water pressure change mitigating means for gently passing water through the pressure chamber and slowly changing the water pressure in the pressure chamber. The water pressure in the pressure chamber is reduced by the above, the valve body of the diaphragm valve is moved by the water pressure in the primary water supply channel, the valve is opened, and the water pressure in the pressure chamber is increased by closing the pilot valve. In the faucet device in which the valve body of the diaphragm valve is moved by the water pressure of the pressure chamber to close the valve ,
The water pressure change mitigation means is
An orifice provided in a valve body of the diaphragm valve;
A pin having an outer diameter thinner than the inner diameter of the orifice, provided in the faucet body, and entering and exiting the orifice according to the movement of the diaphragm valve, and changing a cross-sectional area of the orifice;
The water faucet device is characterized in that the pressure change in the pressure chamber is slowed down . The faucet device according to claim 1, wherein
The orifice is a faucet device having a large diameter on the side where the pin is inserted and a small diameter on the opposite side.

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