JPH03623Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a water valve device used in water appliances such as instantaneous water heaters.

(Prior Art) The present applicant first provided a main valve that opens and closes a main valve hole in a valve casing, and a sub-valve that opens and closes a sub-valve hole formed in the main valve. is closed by being pushed by water pressure guided into the pressure chamber on its back side,
The main valve is provided with a spring that biases it in the valve opening direction,
We have proposed a water valve device that solves the problem of the main valve not opening when water is drained to prevent freezing by springing the main valve toward the opening side using the spring. (Utility Application No. 59-91084) (Problem to be solved by the invention) However, in this device, the spring is only fitted to the outer periphery of the end protrusion of the main valve, so the main valve is There is an inconvenience that when it retreats from the main valve hole and opens it, it is pushed by the amount of water and separates from the protrusion.

(Means for Solving the Problems) The purpose of the present invention is to obtain a device free from such inconveniences, and includes a main valve 3 for opening and closing the main valve hole 2 in the valve housing 1, and a main valve 3 for opening and closing the main valve hole 2. Sub-valve hole 4 formed in valve 3
The main valve 3 is normally closed by being pushed by the water pressure introduced into the pressure chamber 6 on the back side, and the main valve 3 is provided with a sub valve 5 that opens and closes. In a device equipped with a helical spring 7 that biases the
A protrusion 8 protruding toward the main valve hole 2 is provided at the end of the main valve 3 facing the main valve hole 2, and one end of the helical spring 7 is fitted onto the outer periphery of the protrusion 8. A locking piece 9 for locking the helical spring 7 is provided on the outside of the portion 8.

(Function) When the sub-valve 5 is now pressed by an appropriate means to open the sub-valve hole 4, the water in the pressure chamber 6 escapes from the sub-valve hole 4.
Therefore, the main valve 3 is pushed back from the main valve hole 2 side by the water supply pressure and opens. Therefore, the water supply flows downstream through the main valve hole 2.

At this time, a large flow velocity is generated around the outer periphery of the helical spring 7, whereby the helical spring 7 is compressed in a direction in which it is compressed.

Therefore, the helical spring 7 can be detached from the main valve 4. However, in the present invention, a protrusion 8 protruding toward the main valve hole is provided at the end of the main valve facing the main valve hole, and one end of the helical spring 7 is fitted onto the outer periphery of the protrusion 8. Since the locking piece 9 for locking the helical spring 7 is provided on the outside of the protrusion 8, the spring 7 is reliably locked to the locking piece 9. Separation from valve 3 can be prevented. In addition, the spring 7 can be easily connected by simply fitting the spring 7 into the protrusion 8.

When the sub-valve 5 is moved by an appropriate means to close the sub-valve hole 4, the water pressure on the water supply side gradually enters the water pressure chamber 6, and the water pressure causes the main valve 3 to close the main valve hole 2. close.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, 1 is a valve housing, 10 is an inlet, 11 is an outlet, 2 is a main valve hole provided in the valve housing 1, and 3 is opposed to the main valve hole 2 provided in the water supply channel 3. 4 is a sub-valve hole provided in the main valve 2; 5 is a sub-valve that opens and closes the sub-valve hole 4; 7 is a helical spring that springs the main valve 3 toward the opening side. , and the main valve 3 is always
is closed by the water pressure of the water pressure chamber 6 connected to the upstream water supply channel, and when the sub valve 5 is opened, the main valve 3 is released from the water pressure of the water pressure chamber 6, and the water pressure on the water supply channel side as well as the helical spring are released. It opens under the pressure of spring 7.

The configuration so far is not particularly different from the one proposed earlier.

In the present invention, a cylindrical piece as a protrusion 8 that protrudes toward the main valve hole 2 side is provided at the end of the main valve 3 facing the main valve hole 2, and a cylindrical piece is provided outside the protrusion 8. One end of the helical spring 7 was inserted and locked with a locking piece 9.

To describe this further, the main valve 3 is arranged in an outer cylinder 3a having a space between it and the valve housing 1 to form the water pressure chamber 6.
, a seat member 3b inserted at the front end thereof facing the main valve hole 2, and a cylindrical body 3c screwed onto the end of the outer cylinder 3a, which also serves as a presser for the seat member 3a. , the cylindrical body 3c is made to protrude forward from the seat member 3b and protrude into the main valve hole 2, and the protrusion is the protrusion 8, and the outer periphery of the protrusion 8 is made slightly narrower. , a spiral locking piece 9 is provided at the tip thereof.

Note that the water pressure chamber 6 is connected to the inside of the cylinder 3c through the sub-valve hole 4.
The water passage 12 was designed to communicate with the water passageway 12.

In this case, there is an advantage that the flow generated when the main valve hole 2 is opened by the main valve 3 can generate a negative pressure at the opening at the end of the water passage 12, and the water in the pressure chamber can be quickly moved. .

In addition, in the drawing, 13 is an outer cylinder 3a that constitutes the water pressure chamber 6.
14 is a spring that urges the auxiliary valve hole 5 toward the closing side, and 15 is a push rod that opens the auxiliary valve 5.

(Effect of the invention) According to the invention as described above, a protrusion projecting toward the main valve hole is provided at the end of the main valve facing the main valve hole, and one end of the helical spring is attached to the outer periphery of the cylinder piece. At the same time, a claw piece for locking the helical spring is provided on the outside of the protrusion, so it can be easily attached to the main valve by simply fitting the end of the spring onto the outer periphery of the protrusion. Moreover, since the spring is securely locked by the locking piece, the inconvenience of the spring coming off from the main valve can be easily solved.

[Brief explanation of the drawing]

The drawing is a cutaway side view of one example of implementing the present invention. 1...Valve housing, 2...Main valve hole, 3...Main valve, 4...
... Sub-valve hole, 5... Sub-valve, 6... Pressure chamber, 7... Spiral spring, 8... Projection, 9... Locking piece.

Claims (1)

[Scope of utility model registration request] The main valve is equipped with a main valve that opens and closes a main valve hole in the valve casing, and a sub-valve that opens and closes a sub-valve hole formed in the main valve, and the water pressure that is normally guided into the pressure chamber on the back side of the main valve. The main valve has a main valve hole at the end facing the main valve hole, and the main valve is provided with a helical spring that biases the main valve in the valve opening direction. A water valve device comprising a protrusion protruding to the side, one end of a helical spring inserted into the outer periphery of the cylinder piece, and a protrusion for locking the helical spring on the outside of the cylinder piece.