JP2003265350A - Water discharge control apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a water hammer is high since a pressure receiver is pressed, rapidly abutted to a valve seat and closed by a secondary side pressure caused by the closing action of a second opening/closing valve. <P>SOLUTION: In the water discharge control apparatus mounted with first and second opening/closing valves on the upstream and downstream sides of piping respectively and provided with a valve member for opening/closing the valve seat equipped with a seal valve and changing a flow passed through a valve hole corresponding to a distance to the valve seat by contacting/separating said first opening/closing valve to/from said valve seat to control the opening/closing action of the first opening/closing valve in accordance with the variation of the secondary pressure caused on the downstream side of the first opening/closing valve by the opening/closing action of the second opening/closing valve, when a valve body mounted on the pressure receiver is to be moved in a closing direction by receiving the pressure in the closing direction on the pressure receiver because of increase in the secondary pressure on the downstream side of the first opening/closing valve, the valve body is moved while being accompanied with rotary movement in linear movement. Thus, a time to close the opening/closing valves is delayed and the water hammer is reduced. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water discharge control device having first and second on-off valves upstream and downstream of a pipe, respectively. 2. Description of the Related Art As a conventional water discharge control device, as shown in FIG. 5, a shower device provided with a second opening / closing valve in a shower head downstream of a pipe (JP-A-10-29557).
7) and a water discharge control device that combines a constant pressure valve for water supply (see Japanese Patent Application Laid-Open No. 7-219642) as the first on-off valve upstream. [0003] The shower apparatus 1 comprises a shower head 3 having a sprinkling port 2 at a front end thereof, and a shower hose 4 for supplying hot and cold water to the shower head 3. Second on-off valve 5
Is installed in the shower head 3 and is operated by the operation of the push button 6 by the user.
Start / stop watering from The first opening / closing valve 7 is used for controlling water shutoff / flow rate and pressure by controlling the opening / closing operation by the pressure fluctuation generated in the shower hose 4 by the opening / closing operation of the second opening / closing valve 5. When the first on-off valve 7 pushes the push button 6 to open the second on-off valve 5, the valve body 9 mounted on the pressure receiving body 8 is opened, and the fluid flows through the first on-off valve 7. The opening / closing valve 7 → the shower hose 4 → the second opening / closing valve 5 → the water is spouted from the water spout 2 through the shower head 3. After that, when the push button 6 is pressed again to close the second on-off valve 5, the secondary pressure on the downstream side of the first on-off valve 7 sharply increases, and the second on-off valve 5 is fitted in the valve case 11. The pressure receiving body 8 is pressed against the bias of the spring 12, and the valve body 9 mounted on the pressure receiving body 8 comes into contact with and seals the valve seat 10. However, in this case, the pressure receiving body 8 is pushed by the secondary pressure generated by the closing operation of the first on-off valve 7, and the valve body 9 is suddenly linearly moved. There is a problem that the water hammer is large because it moves and closes in a short time by contacting the valve seat 10. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a water discharge control device having first and second on-off valves upstream and downstream of a pipe, respectively. It is an object of the present invention to provide a water discharge control device that reduces the rise of the water hammer due to the rapid closing operation of the first on-off valve accompanying the closing operation of the on-off valve. Means for Solving the Problems and Action / Effect The present invention, which has been made to achieve the above object, has first and second on-off valves attached upstream and downstream of a pipe, respectively. A valve member that opens and closes the valve seat by being brought into and out of contact with a valve seat having a seal valve, and that changes a flow rate passing through a valve hole according to a distance from the valve seat. A water discharge control device configured to control the opening / closing operation of the first opening / closing valve in accordance with a change in secondary pressure generated downstream of the first opening / closing valve by the opening / closing operation of the second opening / closing valve; Due to the increase of the secondary pressure downstream of one on-off valve,
A water discharge control device characterized in that when the valve element of the first on-off valve moves in the closing direction, the valve element moves by a movement accompanied by a linear movement and a rotational movement. By doing so, when the valve element of the first on-off valve moves in the closing direction, it moves by almost linear motion only in the prior art, whereas in the present invention, it rotates by linear motion. Because of the movement, the time required for the movement of the valve element is lengthened, and the rise of the water hammer due to the rapid closing operation of the first on-off valve can be reduced. Preferred embodiments of the present invention will be described below in order to further clarify the structure and operation of the present invention described above. FIG. 1 shows a shower device 1 using a water discharge control device according to claim 1 of the present invention. The shower device 1 has a shower head 3 having a sprinkling port 2 at a front end thereof.
And a shower hose 4 for supplying shower water to the shower head 3 and a water discharge control device. In the shower device 1, the water discharge control device comprises first and second on-off valves mounted on the upstream and downstream sides of the hose, respectively. Second on-off valve 5
Is installed in the shower head 3 and is operated by a user's operation of the push button 6 to start and stop watering from the shower head 3. The opening / closing operation is controlled by the pressure fluctuation generated in the hose by the opening / closing operation of the opening / closing valve 5 to perform water stoppage, flow rate adjustment and pressure adjustment. The first opening / closing valve 13 includes a connecting portion connecting one end of the valve case C14 to the primary side, and a connecting portion connecting one end of the valve case D15 to the secondary side. A pressure receiving body 16 that moves in the axial direction due to a pressure change is fitted,
7 to push it to the secondary side.
6 is provided with a valve body 18 at the front end on the primary side, and a valve case C
14. A valve seat metal fitting 20 for holding a valve seat 19 abutting against the opening edge of the front end of the valve body portion 18 is fitted into a portion of the valve case D15 closer to the primary side. Screwed at D15. The pressure receiving body 16 is provided with a projection 21, and the pressure receiving body 16 is mounted so that the projection 21 is inserted into a guide groove 22 provided in the valve case D15. As shown in FIG. 2, when the first on-off valve 13 is pushed to push the push button 6 to open the second on-off valve 5,
The valve element portion 18 mounted on the pressure receiving body 16 is opened, and the fluid is ejected from the water spout 2 through the first opening / closing valve 13 → shower hose 4 → second opening / closing valve 5 → shower head 3. At this time, due to the increase in the pressure on the secondary side, the pressure receiving body 16 is pushed into the primary side against the bias of the spring 12, and the valve body 18 and the valve seat 19 mounted on the pressure receiving body 16 are provided. Is narrowed, the pressure is adjusted, and the pressure on the secondary side is kept constant. Thereafter, when the push button 6 is depressed again to close the second on-off valve 5, the first on-off valve rapidly increases the secondary pressure downstream of the first on-off valve 13 as shown in FIG. As the pressure increases, the pressure receiving body 16 is pushed, and the valve body portion 18 mounted on the pressure receiving body 16 comes into contact with the valve seat 19 to be sealed and the water discharge is stopped. At this time, as shown in FIG. 4, the pressure receiving body 16 moves while the projection 21 provided on the pressure receiving body 16 draws a spiral along the guide groove 22 provided in the valve case D15.
The time during which the on-off valve closes can be delayed to reduce water hammer. As described above, in the closing operation of the second on-off valve, an increase in the secondary pressure downstream of the first on-off valve causes
When the pressure receiving body receives the pressure in the closing direction, the valve body mounted on the pressure receiving body comes into contact with the valve seat and tries to close rapidly, but the pressure receiving body moves in a linear motion accompanied by a rotational motion. Thus, the time during which the on-off valve closes can be delayed, and the water hammer can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view illustrating a shower device using a water discharge control device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a state where a second on-off valve according to an embodiment of the present invention is open. FIG. 3 is a cross-sectional view showing a state where a second on-off valve according to an embodiment of the present invention is closed. FIG. 4 is a partial structural view of a second on-off valve according to an embodiment of the present invention. Sectional view showing a shower device using a control device [Description of symbols] 1: Shower device 2: Water spout 3: Shower head 4: Shower hose 5: Second open / close valve 6: Push button 7: First open / close valve 8: Pressure receiving body 9: Valve body 10: Valve seat 11: Valve case 12: Spring 13: First open / close valve 14: Valve case C 15: Valve case D 16: Pressure receiving body 17: Spring 18: Valve body 19 : Valve seat 20: valve seat fitting 21: projection 22: guide groove

Claims (1)

Claims 1. A first and a second on-off valve are attached to an upstream and a downstream of a pipe, respectively, and the on-off valve comes into contact with and separates from a valve seat provided with a seal valve, whereby the valve is opened and closed. A valve member that opens and closes the seat and changes the flow rate passing through the valve hole according to the distance from the valve seat, and the opening and closing operation of the second on-off valve causes the downstream side of the first on-off valve to open and close. In the water discharge control device that controls the opening / closing operation of the first opening / closing valve according to the generated secondary pressure fluctuation, when the valve body of the first opening / closing valve moves in the closing direction, the valve body moves linearly. A water discharge control device, wherein the water discharge control device moves in a motion accompanied by a rotational motion.