JPS6112459Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic fluid cycle switching valve, and more particularly to an automatic fluid cycle switching valve that allows fluid to alternately flow out of two outflow holes.

Conventionally, this type of fluid switching valve used a method in which a spool valve was operated by a solenoid valve to switch the outflow path, but it was not possible to use a conductive fluid such as water,
When handling flammable fluids such as gasoline and petroleum, it is undesirable to handle flammable fluids such as electric shock and fire.

The present invention provides a switching valve that can periodically switch a fluid outflow path by utilizing the pressure of a controlled fluid without using an operating means such as a solenoid valve.

Hereinafter, the present invention will be explained in detail based on the drawings.
In Fig. 1, the main body 1 has an inflow hole 2 and a first and second
Outflow holes 3 and 4 are formed. A spool valve 5 is inserted into the main body 1 so as to be able to reciprocate.

A constricted portion 6 is formed in the spool valve 5 at a position corresponding to the inflow hole 2, and first and second tapered surfaces 13 and 14 in the shape of a truncated cone are formed on both sides of this constricted portion 6. 13,1
4 have first and second O-rings, respectively.
Sealing members 15 and 16 are arranged. on the other hand,
On the main body 1 side, first and second conical surfaces 17 and 18 corresponding to the tapered surfaces 13 and 14 are arranged to sandwich the inflow hole 2. Further, between one end of the spool valve 5 (on the right side in the figure) and the main body 1, there is a spring means 1 for pressing the spool valve 5 to the left side in the figure.
0 is placed. On the other hand, the other end of the spool valve 5 (on the left side in the figure) has its outer peripheral edge connected to approximately the center of a diaphragm 7 held by the main body 1 side. This diaphragm 7 forms a first cavity 8 and a second cavity 9 together with the main body 1 . The first empty chamber 8 (on the left side in the figure) and the first outflow hole 3 (on the left side in the figure) are communicated through a communication passage 11, and the communication passage 11 is provided with a throttle means 12.

Further, first and second sealing means 19 made of O-rings are provided on the outer circumferential surface of the spool valve 5 closer to the diaphragm 7 than the first outlet hole 3, and on the outer circumferential surface of the second outlet hole 4 closer to the spring means 10, respectively. , 20 are arranged, and a certain gap is provided between the first sealing means 19 and the second sealing means 20 between the outer circumferential surface of the spool valve 5 and the inner circumferential surface of the main body 1 for the purpose of forming a flow path. is set.

Next, a description will be given based on the embodiment shown in FIG. The difference from the embodiment shown in FIG. The configuration is otherwise the same except that the first outflow hole 3 is located on the inflow hole 2 side.

The effects of the present invention will be explained based on the embodiment shown in FIG. In the state shown in FIG. 1, when fluid flows in from the inflow hole 2 side, the fluid flows out into the first outflow hole 3 through the gap between the spool valve 5 and the main body 1, and a portion of the fluid flows through the communication path 11. and flows into the first cavity 8. When the fluid pressure in the first cavity 8 overcomes the pressing force of the spring means 10, the spool valve 5 moves towards the spring means 10.

As a result, the sealing between the second tapered surface 14 and the second conical surface 18 is broken, while the sealing between the first tapered surface 13 and the first conical surface 17 is achieved,
The fluid that was flowing out to the first outflow hole 3 side will flow out from the second outflow hole 4 side.

On the other hand, when the fluid does not flow out from the first outflow hole 3, the fluid pressure in the first cavity 8 escapes to the first outflow hole 3 side via the communication path 11 and decreases. do. As a result, the spring means 10 causes the spool valve 5 to return to the state shown in the figure, and the second outflow hole 4
The fluid flowing out from the side will flow out from the first outflow hole 3 side. By repeating such an operation, it is possible to continuously switch the fluid outflow passage. Further, an arbitrary switching period can be obtained by adjusting the amount of throttling by the throttling means 12 and changing the pressing force of the spring means 10.

As mentioned above, the present invention allows periodic switching of fluids to be performed extremely safely without the use of special operating means such as electromagnetic valves.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention,
FIG. 2 is a sectional view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Main body, 2... Inflow hole, 3... First outflow hole, 4... Second outflow hole, 5... Spool valve, 6... Constriction, 7... Diaphragm, 8
...First vacant chamber, 9... Second vacant chamber, 10... Spring means, 11... Communication path, 12... Squeezing means, 1
3...First tapered surface, 14...Second tapered surface, 15...First sealing member, 16...Second sealing member, 17...First conical surface, 18...Second
conical surface, 19... first sealing means, 20...
Second sealing means.

Claims (1)

[Scope of utility model registration request] Inflow hole 2, first outflow hole 3, and second outflow hole 4
a main body 1 having a main body 1, a spool valve 5 that reciprocates within the main body 1, a spool valve 5 that is fixed to one end of the spool valve 5, a peripheral edge of which is held on the main body 1 side, and a first cavity together with the main body 1. 8 and a diaphragm 7 forming a second cavity 9; spring means 10 pressing the spool valve 5 in one direction; and the first or second outflow holes 3, 4.
and a communication passage 11 that communicates with the first or second cavity 8, 9 and is equipped with a throttle means 12, and the fluid flowing in from the inflow hole 2 flows into the first or second outflow hole. 3 and 4, the fluid pressure acts on the diaphragm 7 through the communication path 11, thereby moving the spool valve 5 against the spring means 10, and opening the fluid outflow path to the first Or an automatic fluid periodic switching valve characterized in that it is configured to be switched to the second outflow holes 3 and 4.