JPH0634061A - Fixed quantity faucet - Google Patents

Abstract

PURPOSE:To prevent inoperativeness of an impeller under low feed water pressure or unopening of a main valve body under high feed water pressure and the occurrence of a water hammer without deteriorating compactness of a volume regulating faucet to close a bypass valve when preset water quantity is discharged from a water discharge port by an impeller type water meter arranged in the middle of a bypass to suck main valve body closing feed water pressure flowed into from a small orifice under vacuum. CONSTITUTION:Clearance is arranged between a lower flange of a check valve 13 arranged on the bottom plate and the inner wall of a valve seat 1 in a main valve body closed condition, and when a main valve body 5 starts to be opened, the main valve body is made to be opened by energy consumption of feed water blown out from the clearance, and a pressure generating inside collar 23 is arranged in the lower part inside of the valve seat so as to open the check valve when the lower flange comes out above the valve seat, and a flow rate to a bypass 9 is increased, and when the main valve body 5 is closed, and when the lower flange enters the valve seat, the occurrence of a water hammer is prevented by energy consumption of the clearance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed water stopcock that automatically closes after supplying a predetermined amount of water or hot water from a water supply to a bathtub or other large-capacity water tank.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1, a valve housing 4 having a water supply port 3 connected between a valve seat 1 and a vertical cylinder 2 facing the valve seat 1, and a valve housing 4 which is vertically movable in the cylinder 2. Via a mounted piston-shaped main valve body 5, a small orifice 7 that constantly connects the cylinder chamber 6 above the main valve body and the water supply port 3, and a bypass valve 8 having a larger valve orifice area than the small orifice. A bypass 9 whose upstream end is connected to the cylinder chamber 6 and whose downstream end is vacuum-sucked by the discharged water flow from the valve seat 1.
And an impeller-type water quantity meter 10 provided so as to integrate the flow rate in the middle of the bypass, and a bypass valve 8 so that a set quantity of water corresponding to the quantity of water discharged from the drainage port 11 of the valve casing is flown to the bypass 9. A fixed mechanism is provided with a control mechanism that controls in conjunction with an impeller-type water meter, and a conical projection that fits into the valve seat lumen when the main valve body closes the valve seat is attached to the lower end of the main valve body. The faucet is disclosed in Japanese Utility Model Laid-Open No. 3-127873.

[0003]

In such a metered water stopcock, the rotational resistance of the impeller 12 increases due to an increase in the reduction ratio of the impeller-type water meter, whereas the metered waterstop is made compact. In addition, since the orifice area of the small orifice 7 cannot be increased, when the water pressure supplied to the water inlet 3 becomes low, the impeller drive flow rate flowing through the bypass becomes insufficient and the impeller cannot rotate.

When the valve seat is opened by the main valve body, the discharge port 11
Since it is necessary to increase the discharge flow rate from the valve seat, it is not possible to provide water hammer prevention means on the valve seat side when the valve seat is closed, so a conical projection that can be fitted into the valve seat inner cavity is provided in the main valve body. Although it is attached to the lower end, when the water pressure supplied to the water inlet 3 becomes high, when the main valve body starts to open the valve seat, the space between the valve seat and the conical projection fitted into the valve seat is increased. The main valve body cannot be opened because the velocity of the flow therethrough increases and creates a vacuum region below the conical projection.

For this reason, in the prior art, the permissible fluctuation range of the water supply pressure to the fixed-quantity stopcock was extremely narrow, and it could not be used in each home where the difference in height of the water supply pressure was large. It is an object of the present invention to solve both of the above problems at once without deteriorating the compactness of the faucet.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a valve rod having a passage through which the upper and lower sides of the bottom plate can be communicated is vertically inserted into the center of the bottom plate of a piston-shaped main valve body. At the upper and lower edges of
A non-return valve having a flange for fixing the valve rod lifting range whose flow path can be opened / closed by the bottom plate is fixed and constantly closed with a substantially constant small force to provide a valve seat by the main valve body. The lower flange of the check valve is fitted into the inner space of the valve seat with a small gap when the valve is closed, and the bypass valve is installed below the lower flange of the check valve fitted in the inner space of the valve seat. An inner collar with an inner diameter larger than the valve opening is integrally provided on the inner wall of the valve seat, and when the lower flange comes out above the valve seat, pressure is generated above the valve seat to push up and open the check valve. It is characterized in that it is configured to.

[0007]

FIG. 2 shows an embodiment of a check valve 13 mounted in the center of a bottom plate 5a of a main valve body 5, in which a lower flange 15 is integrally provided at the lower end of a cylindrical valve rod 14 having a closed upper end. At the top of the cylindrical valve rod 14, a circular upper flange 17 is detachably fixed to a bolt 16 planted in the cylindrical valve rod 14 with a nut 18, and the cylindrical upper end of the cylindrical valve rod 14 is drilled. The four through holes 19 cooperate with the valve stem lumen to form a flow path capable of communicating the upper and lower sides of the bottom plate 5a of the main valve body 5. Reference numeral 20 denotes an O-ring fitted in a V groove formed between the chamfered portion provided on the outer periphery of the upper end of the cylindrical valve rod 14 and the upper flange 17,
Reference numeral 1 denotes a packing attached to the bottom plate 5a of the main valve body with a packing holding member 22.

The check valve 13 is constantly biased to be closed by the gravity action against its buoyancy, and when the main valve body 5 closes the valve seat 1 as shown in FIGS. The lower flange 15 of the check valve fits into the inner cavity of the valve seat with a small gap C, and the inner flange 2 located below the lower flange 15
3 is integrally provided on the inner wall of the valve seat 1, and a circular void 24 connected to the downstream end of the bypass 9 is concentrically provided below the inner flange 23 with the peripheral wall of the drain port 11. A jet of water from the valve seat 1 is used to generate a vacuum at the downstream end of the bypass 9.

In the impeller type water meter 10, the rotation of the impeller 12 driven in the direction of the arrow in FIG. 3 by the flow of the bypass 9 as in the conventional case is caused to sequentially pass through the multiple reduction gear unit and the friction coupling (not shown). Is transmitted to the setting shaft 25 for setting the drainage rate by deceleration, and the setting shaft 25 is configured to rotate in the direction of the arrow in FIG.
The control mechanism of the bypass valve has a compression spring 26 that constantly presses the bypass valve 8 so as to close the valve opening 8a shown in FIG.
And a lever 27 whose upper end is engaged with the neck of the bypass valve 8.
The lever 27 is pivotally attached 28 to the valve casing 4, and the lower end of the lever 27 is rotatably supported by the circular cam 29 for opening the bypass valve fixed to the setting shaft 25 and the setting shaft. The pin 31 planted in the circular cam 29 is brought into contact with the circular cam 30 for closing the bypass valve at the same time, and the pin 31 planted in the circular cam 29 is inserted into the circular cam 3.
It is engaged with a circular arc-shaped long hole 32 which is concentrically formed at 0.

Therefore, in the closed state of the bypass valve 8 in FIG. 1, the setting shaft 25 is slipped while slipping the friction joint.
Is rotated by a required drainage amount setting angle in the direction of the arrow in the figure, the cam 29 remains stationary until the pin 31 comes into contact with the other end of the arc-shaped elongated hole 32 at the beginning of the rotation. By rotating counterclockwise, the outer peripheral cam surface of the cam 29 rotates the lever 27 to the open position of the bypass valve 8, and then the cam 3
0 rotates in the same direction as the cam 29 via the pin 31, the notch 30a of the cam reaches the required drainage amount regulation position, and the impeller 12 is driven by opening the bypass valve 8.

Thus, when the impeller 12 decelerates the setting shaft 25 in the direction of the arrow in FIG. 3 through the friction joint, the pin 31 of the cam 29 is stationary, and the arc-shaped elongated hole 32 of the cam 30 is initially formed. After returning to the position shown in the figure along with, the cams 29 and 30 are united to rotate in the arrow direction (clockwise direction), and if the notch 30a of the cam 30 faces the lower end of the lever 27, the bypass valve 8 It is the same as before that the valve spring 8a is closed by the elastic force of the compression spring 26 and the impeller 12 is stopped.

In the state of FIG. 1 in which the bypass valve 8 is closed, the reverse occurs mainly due to the difference between the water pressure of the water supply port 3 transmitted from the small orifice 7 into the cylinder chamber 6 and the pressure of the inner cavity of the valve seat 1. The stop valve 13 is maintained in the closed state, and the main valve body 5 closes the valve seat 1 due to the difference between the upper and lower water supply pressure acting areas.

In this state, when the setting shaft 25 is rotated by the required drainage amount setting angle and the bypass valve 8 is opened, the small orifice 7 is opened.
Since the flow passage area of the valve opening 8a is larger and the downstream end of the bypass 9 is maintained in vacuum, the cylinder chamber 6
The flow rate discharged from the bypass valve to the bypass chamber is larger than the flow rate flowing from the small orifice into the cylinder chamber.
The main valve body begins to open due to a pressure difference that pushes it up and down, but the check valve 13 moves up and down the lower flange 15 until the lower end of the check valve 13 comes out above the inner cavity of the valve seat 1. The closed state is maintained due to the pressure difference between the two. Further, even if the water supply pressure is high, the degree of vacuum generated below the check valve is low due to energy consumption when passing through the clearance C between the lower flange 15 of the check valve and the inner wall of the valve seat, so that the main valve body 5 is opened. There is no fear of disappearing.

With the opening of the main valve body 5, the check valve 13 is moved to the valve seat 1
When the pressure for pushing up and opening the check valve is generated above the valve seat by the inner collar 23 having an inner diameter larger than that of the valve port 8a, the check valve opens, so that the water supply port 3 has a substantially uniform pressure. The water flow sequentially supplied at such a pressure is divided into a main flow passing through the valve seat 1 and a small flow rate of bypass flow passing through the bypass 9 through the small orifice 7 and the check valve 13 and sequentially through the cylinder chamber 6 and the valve opening 8a. Although the flow is divided, the pressure at the connection between the downstream end of the bypass flow and the downstream end of the main flow becomes approximately equal, so the flow rate ratio between the bypass flow and the main flow depends on the bypass flow. Is substantially constant even when the valve is driven, and even if the water supply pressure to the water supply port 3 is low, the increased flow rate of the check valve 13 due to the provision of the inner collar 23 in the valve seat lumen compensates for the insufficient flow rate of the bypass. , There is no fear that the impeller 12 will stop.

In this way, the drainage amount of the drainage port 11 reaches the set value, and as described above, the bypass valve 8 moves from the state of FIG.
When a is closed, the valve opening is closed abruptly, so that the internal pressure of the cylinder chamber rises due to the inertia of the water flow flowing from the check valve 13 into the cylinder chamber 6, and the self-weight closing action of the check valve. As a result, the check valve 13 is closed as shown in FIG. 4, so that the main valve body 5 is lowered by the inflow water pressure from the small orifice 7 into the cylinder chamber 6.

When the main valve body descends and the lower flange 15 at the lower end of the check valve substantially closes the inlet of the valve seat 1, the water flowing into the valve seat is suddenly stopped, and Although the pressure tends to rise rapidly, this kinetic energy for raising the pressure is consumed by the water jetting downward from the small gap C between the outer peripheral surface of the lower flange 15 and the inner wall of the valve seat, If the water supply source is about water supply, the main valve body 5 seals the inlet of the valve seat 1 without fear of causing a water hammer phenomenon.

In the illustrated embodiment, in order to make sure that the main valve body 5 closes the valve seat 1 when the water pressure supplied to the water supply port 3 is very low, the main valve body is constantly pushed down. A weak compression spring 33 is installed in the cylinder chamber 6,
The compression spring 33 is not always necessary.

[0018]

As described above, the present invention integrates the flow rate of the bypass which is significantly smaller than that of the valve seat, and regulates the amount of outflow water from the drainage port proportional to the flow rate to a set value. If the check valve is attached to the main valve body of the stopper and the inner collar is provided on the inner wall of the valve seat, the impeller drive flow rate will be insufficient and the impeller type water meter will operate when the water pressure supplied to the water inlet is low. Not only can the danger of disappearing be eliminated, but the non-opening phenomenon of the main valve body and the water hammer phenomenon can be reliably prevented from occurring when the supply water pressure is high, and the compactness of the fixed-quantity water stopcock is impaired. Without fear, it is possible to reliably achieve the quantitative water-stopping function in each home where the difference in the supply water pressure is large.

[Brief description of drawings]

FIG. 1 is a vertical front view of an embodiment of the present invention when a valve seat is closed.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a vertical cross-sectional front view of essential parts when the valve seat is opened.

FIG. 4 is an explanatory view of the action immediately after the bypass valve is closed.

[Explanation of symbols]

 1 Valve Seat 2 Cylinder 3 Water Supply Port 5 Piston-shaped Main Valve Body 7 Small Orifice 8 Bypass Valve 9 Bypass 11 Drain Port 12 Impeller 13 Check Valve 14 Valve Rod 15 Lower Flange 17 Upper Flange 19 Through Hole

Claims (1)

[Claims] 1. A valve housing in which a water supply port is connected between a valve seat and a vertical cylinder facing the valve seat, a piston-shaped main valve body fitted in the cylinder so as to be movable up and down, and an upper portion of the main valve body. A small orifice that constantly connects the cylinder chamber and the water supply port,
An upstream end is connected to the cylinder chamber via a bypass valve having a larger valve opening area than the small orifice, and a downstream end is vacuum-sucked by the discharged water flow from the valve seat. An impeller-type water meter provided to integrate the flow rate and a control that controls the bypass valve in conjunction with the impeller-type water meter so that the set amount of water according to the amount of water discharged from the drainage of the valve casing flows to the bypass. In a fixed-quantity water stopcock equipped with a mechanism, a valve rod having a flow path capable of communicating the upper and lower sides of the bottom plate is vertically inserted into the center of the bottom plate of the piston-shaped main valve body, and the upper and lower sides of the valve rod are vertically inserted. The main valve body is provided with a non-return valve, which is fixed at its end with a flange for restricting the range for raising and lowering the valve rod, whose flow path can be opened and closed by the bottom plate, and which is normally closed by a substantially constant small force. When the valve seat is closed due to the It is configured to be fitted with a gap, and below the lower flange of the check valve fitted in the valve seat bore, an inner collar having an inner diameter larger than the valve opening of the bypass valve is integrally provided on the inner wall of the valve seat. A fixed-quantity water stopcock configured to generate a pressure above the valve seat to push up and open the check valve when the lower flange comes out above the valve seat.