JPH0481666B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to a water valve device used as a shower valve inserted in a passage communicating a water outlet of an instantaneous water heater with a shower.

(Prior Art) Conventionally, this type of device includes a main valve that opens and closes a main valve hole in a valve casing, a sub-valve that opens and closes a sub-valve hole formed in the main valve, and an advance/retractor that controls opening and closing of the sub-valve. The sub-valve is normally closed by the advance of the spindle, and the main valve is closed by being pushed by the water pressure introduced into the pressure chamber on the back side of the main valve through the through hole on the side. The formula for this is known.

(Problem to be solved by the invention) However, in this case, the through hole usually has a diameter of 1 mm.
These pores are generally small in size, and such pores are easily clogged by foreign matter, and especially when hot water of 40℃ or higher is poured, calcium etc. in the water can precipitate and cause clogging, which is an inconvenience. Accompany.

On the other hand, in order to eliminate such inconvenience, if the diameter of the conduction hole is made large, the amount of inflow from the introduction hole will increase, and even if the sub-valve is opened, the internal pressure of the pressure chamber will not drop and the main valve will be closed. There is a possibility that the valve may not open.

(Means for Solving the Problems) The purpose of the present invention is to obtain a device free from such inconveniences, and the first invention as set forth in claim 1 is directed to The main valve is provided with a main valve that opens and closes a main valve hole, a sub-valve that opens and closes a sub-valve hole formed in the main valve, and an operation spindle that is movable back and forth that opens and closes the sub-valve. is in the forward position, the auxiliary valve closes, and the main valve
In a pressure chamber on the back side of the pressure chamber, the pressure chamber is closed by pressure of water guided through a through hole on the side thereof, and the through hole is positioned on the movement locus of the spindle, and the backward movement of the spindle causes the through hole to close. The present invention is characterized in that the spindle is provided with a throttle valve that restricts the amount of flow from the communication hole into the pressure chamber.

Further, the second invention described in the same paragraph 2 provides a main valve that opens and closes a main valve hole, a sub valve that opens and closes a sub valve hole formed in the main valve, and a sub valve that opens and closes a sub valve hole formed in the main valve. and an operating spindle that can freely move back and forth for opening and closing operations, and the spindle is normally in the forward position so that when the auxiliary valve closes, the main valve opens a communication hole on its side into a pressure chamber on its back side. A cleaning valve that is closed by being pushed by water pressure guided through the through hole, which positions the through hole on the movement locus of the spindle and removes foreign matter adhering to the inside of the through hole by the backward movement of the spindle. is provided on the spindle.

(Function) To explain its function, when the operating spindle is moved backward to open the auxiliary valve from the so-called closed state where both the main valve and the auxiliary valve are closed, the water pressure in the pressure chamber is released through the auxiliary valve hole. The outflow of water causes the main valve to open. In this case, according to the first invention, when the throttle valve provided on the operating spindle is made relatively large so that the amount of flow into the pressure chamber from the through hole is restricted and the through hole is not clogged. However, after the auxiliary valve is opened, the pressure in the pressure chamber decreases, and the main valve is opened.

Furthermore, when the through hole is formed to have a relatively small diameter, the second invention described above is mainly applied. According to this, foreign matter such as calcium deposited and attached in the through hole can be removed by cleaning the operating spindle. It is removed by a valve to prevent the insertion hole from clogging.

(Example) Embodiments of the present invention will be described with reference to the attached drawings.

FIG. 1 shows one example, and 1 indicates a valve housing, in which a main valve 3 for opening and closing the main valve hole 2 is installed.
, an auxiliary valve 5 that opens and closes the auxiliary valve hole 4 formed in the main valve 3, and an operating spindle 6 that can move forward and backward to open and close the auxiliary valve 5. When the sub-valve 5 closes, the main valve 3
However, the pressure chamber 7 on the back side is pushed to close by the water pressure introduced through the through hole 8 on the side surface.
In the drawing, 9 and 10 are the inlet and outlet on the outer periphery,
Reference numeral 11 denotes a spring that elastically biases the sub-valve 5 toward the closing side.
To open the main valve 3, first move the operating spindle 6 backward to open the sub-valve 5. According to this, the water pressure in the pressure chamber 7 is guided downstream through the sub-valve hole 4. In this way, the main valve 3 was released from the water pressure and opened. Although the above is not particularly different from the conventional one, according to the embodiment shown in FIG. A throttle valve 6c provided at the rear end of the operating spindle 6 is configured to exert a throttle action to throttle the amount of flow into the pressure chamber 7 from the through hole 8.

To explain this in detail, the operating spindle 6 is formed with an extension 6a that extends rearward through the sub-valve 5, and a poppet-type throttle valve 6c is formed on this, so that when the operating spindle 6 moves backward, For example, the throttle valve 6
c so that the through hole 8 is narrowed until it is closed.

FIG. 2 shows another embodiment, in which
The operating spindle 6 is provided in advance in a longitudinal direction leading out to the outside through the through hole 8 having a relatively large diameter, and in the case of this type, the operating spindle 6 has a tapered portion at its front portion. connected with
The enlarged portion 6b, which is formed to have a smaller diameter than the through hole 8, is formed as a throttle valve.Thus, when the expanded portion 6b is moved backward, the expanded portion 6b is inserted into the through hole 8, and the inflow amount is reduced. to a predetermined amount.

On the other hand, in the case shown in FIG. 3, the diameter of the through hole 8 is kept relatively small, and a cleaning valve 6d having approximately the same diameter as the through hole 8 is provided at the rear end of the extension 6a. The conduction hole 8
Since a cleaning action is provided to remove foreign substances such as calcium deposited and adhered inside, the through hole 8 will not be clogged.

Further, FIG. 4 shows another embodiment in which a cleaning action is provided, in which the through hole 8 is formed to have the same diameter as the enlarged part 6b, and when the expanded part 6b is used as a cleaning valve and is inserted into the through hole 8, adhesion occurs. The foreign matter was removed to prevent the through hole 8 from becoming clogged.

In the figure, reference numeral 12 indicates a spring that elastically biases the main valve 3 toward the closing side.

(Effect of the invention) According to the invention described in claim 1,
Since the flow rate into the pressure chamber from the through hole is restricted by a throttle valve provided on the operating spindle, the main valve can be opened even when the through hole is made relatively large in diameter to prevent clogging of the through hole.

According to the invention described in claim 2,
Even if the through hole is formed to have a relatively small diameter, stable operation for a long period of time can be ensured because foreign substances such as calcium deposited and attached to the through hole are removed by a cleaning valve provided on the operating spindle.

[Brief explanation of the drawing]

FIG. 1 is a cutaway diagram of one example of the device according to the first invention, FIG. 2 is a cutaway diagram of another embodiment of the device according to the first invention, and FIG. 3 is a cutaway diagram of another embodiment of the device according to the second invention. FIG. 4 shows a cutaway view of another embodiment of the device according to the second invention. 1...Valve housing, 2...Main valve hole, 3...Main valve, 4...
... Sub-valve hole, 5... Sub-valve, 6... Operation spindle,
7... Pressure chamber, 8... Conduction hole, 6b... Ampulla (throttle valve/cleaning valve), 6c... Throttle valve, 6d... Cleaning valve.

Claims (1)

[Claims] 1. A main valve 3 that opens and closes the main valve hole 2 in the valve housing 1;
A sub-valve 5 that opens and closes the sub-valve hole 4 formed in the main valve 3
and an operation spindle 6 that is movable back and forth for opening and closing the sub-valve 5, and the spindle 6 is normally in the forward position so that when the sub-valve 5 is closed and the main valve 3 is The pressure chamber 7 is closed by being pushed by water pressure introduced through a through hole 8 on the side of the pressure chamber 7, and the through hole 8 is connected to the spindle 6.
The water valve device is characterized in that the spindle 6 is provided with a throttle valve 6c which is positioned on the movement trajectory of the spindle 6 and throttles the amount of flow from the through hole 8 into the pressure chamber 7 by the backward movement of the spindle 6. 2 A main valve 3 that opens and closes the main valve hole 2 in the valve housing 1;
A sub-valve 5 that opens and closes the sub-valve hole 4 formed in the main valve 3
and an operation spindle 6 that is movable back and forth for opening and closing the sub-valve 5, and the spindle 6 is normally in the forward position so that when the sub-valve 5 is closed and the main valve 3 is The pressure chamber 7 is closed by being pushed by water pressure introduced through a through hole 8 on the side of the pressure chamber 7, and the through hole 8 is connected to the spindle 6.
A water valve device characterized in that the spindle 6 is provided with a cleaning valve 6d that is located on the movement trajectory of the spindle 6 and removes foreign matter adhering to the through hole 8 by the backward movement of the spindle 6.