JPS6239313B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flow path switching valve device that switches a flow path using a coil spring as a valve device.

Conventional technology Conventionally, this type of valve device was developed in U.S. Pat.
There is a valve device known from the publication No. The configuration is shown in Figures 1 and 2.

In the valve device having such a structure, an elastic wire is wound into a coil to form a valve body a in which the wires are in close contact with each other, one end of which is sealed with a sealing plate b, and the other end is a main body c through which pressure fluid flows. It is attached to the opening d of.

When an abnormally high pressure is applied to the opening d, the valve body a extends in the direction of the winding axis as shown in FIG.
The structure is such that the pressure fluid flows out from the gaps e between the elastic wires.

Problems to be Solved by the Invention However, since the valve body a opens and closes the valve by applying force in the axial direction of the winding, there is a problem in that a large force is required for the operation.

This means that when applying the above configuration to configure a flow path switching valve device that switches multiple flow paths, multiple valve devices are required because a large force is required to open and close a single valve device. The flow path switching valve device requires a larger driving force, and if a solenoid or the like is used as the driving source, it will require a device that consumes more power than necessary, which is inconvenient.

In view of this, the present invention focuses on the weak force in the direction perpendicular to the winding axis direction when forming gaps between the coil spring wires, and provides a plurality of valve devices using coil springs. It is an object of the present invention to provide a flow path switching valve device that switches a plurality of flow paths using the flow path switching valve device.

Means for Solving the Problems In order to solve the above problems, the present invention has the following features:
A valve device main body having a flow path, a second flow path, and a third flow path is provided, and further two valve bodies having valve ports are provided in two of the first to third flow paths. A mounting portion is provided, and the other end of a coil spring with each strand spaced in close contact with each other and one end sealed is attached to the valve port of each valve body mounting portion. A driving device is provided which bends the tip part to form a gap between each strand, and this driving device is connected to a reciprocating part that reciprocates, one end of which is connected to the reciprocating part, and the other end of which is connected to each of the coils. It consists of an actuating lever connected to the tip of a spring, and the connection position of each coil spring to the actuating lever is such that when one of the coil springs is biased and deflects in the normal position of the reciprocating actuator, the other coil spring is bent. The spring is in an unenergized state, and the one coil spring is in an unenergized state at the operating position of the reciprocating portion, and the other coil spring is in a biased position.

Effect: With this configuration, one of the coil springs is bent by the forward movement of the reciprocating part of the drive device, and the interval between the strands is opened, thereby allowing fluid to flow. Further, due to the reciprocating operation of the reciprocating portion, the other coil spring is deflected, similarly allowing fluid to flow therethrough, and also sealing between the strands of one coil spring to prevent fluid flow.

Furthermore, since each coil spring is bent in a direction perpendicular to the winding axis to allow fluid to flow, the driving force for this purpose is also small.

Embodiments Hereinafter, embodiments of the present invention will be described in the third part of the attached drawings.
This will be explained with reference to FIGS. Figure 3 shows an example of application to a three-way solenoid valve.

In the same figure, the other open end 35 of the valve element, in which one end of a tightly wound coil spring 33 is sealed with a sealing fitting 34, is attached toward the fluid passage 31, and the coil spring 33 is similarly attached toward the fluid passage 32. the other open end 38 of the valve element with one end of 36 sealed with a sealing fitting 37;
an actuating lever 4 coupled to a plunger 40 mounted with a solenoid coil 39 and driven by a solenoid coil 39
The sealing fittings 34, 3 are inserted into the through holes 41a, 41b of 1.
7 is fitted.

By energizing and opening the solenoid coil 39, the winding center axis of either one of the coil springs 33, 36 is bent, and the passage 32-30 or the passage 31 is bent.
-30 becomes in a communicating state and the flow path can be switched with a simple structure.

Figure 4 shows an example of application to a four-way switching valve.

In the same figure, closely wound coil springs 55, 5
6, 57, 58 are respectively sealed with sealing fittings 59, 60, 61, 62, and each open end is connected to a fluid passage 51, 52, 53, respectively.
Attach it to 54. The fluid passages 51 and 54 and the fluid passages 52 and 53 are connected to form main passages 45 and 46, respectively. In addition, each sealing fitting 59, 6
0, 61, and 62 are fitted into elongated holes 65a and 65b of the operating lever 65 provided on the plunger 66.

Then, by energizing and opening the solenoid 67,
Move the plunger 66 and the actuating lever 65,
The main passage 45 and the fluid passage 64, the main passage 46 and the fluid passage 63, or the main passage 45 and the fluid passage 63, and the main passage 46 and the fluid passage 64 are switched and communicated with each other, and the flow passages can be switched with a simple structure. It is something.

It goes without saying that in each embodiment, the drive source is not limited to a solenoid, but may be a diaphragm, a bellows, a permanent magnet, a manual drive, etc.

Effects of the Invention As is clear from the above embodiments, the flow path switching valve device of the present invention has a simple structure, and there is no valve seat or valve body that requires precision machining, making it easy to manufacture and low in cost. Furthermore, since the valve is switched simply by bending the valve element made of a coil spring, a large amount of force is not required for the switching operation, so even if the valve has a large diameter, it can be operated with a relatively small driving force. As a result, the material cost when used as a solenoid valve can be extremely reduced.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views of a conventional valve device when closed and open, respectively. FIG. 3 is a cross-sectional view of a three-way switching solenoid valve according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of a three-way switching solenoid valve according to an embodiment of the present invention. FIG. 3 is a sectional view of a four-way switching solenoid valve in another embodiment. 30, 31, 32, 51, 52, 53, 54,
63, 64...fluid passage, 33, 36, 55, 5
6, 57, 58...Coil spring, 34, 37, 5
9, 60, 61, 62...Sealing fitting, 35, 38...
Mounting part, 39, 67...Solenoid coil, 40,
66... Plunger, 41, 65... Actuation lever.

Claims (1)

[Claims] 1 A valve device main body having a first flow path, a second flow path, and a third flow path is provided, and further a valve device body having valve ports in two of the first to third flow paths is provided. Two valve body mounting portions are provided, and the other end of a coil spring, in which each strand spacing is in close contact and one end is sealed, is attached to the valve port of each valve body mounting portion, and each of the above-mentioned coil springs is attached to the outside of the valve device main body. A driving device is provided which bends the tip of the coil spring to form a gap between each strand, and this driving device is connected to a reciprocating part that reciprocates, one end of which is connected to the reciprocating part, and the other end of which is connected to the reciprocating part. an actuating lever connected to the tip of each of the coil springs, the connection position of each of the coil springs to the actuating lever being bent when one of the coil springs is biased at a normal position of the reciprocating actuator; The other coil spring is in a fully biased state, and the one coil spring is in a fully biased state at the operating position of the reciprocating part, and the other coil spring is in a position where it bends under the bias. Switching valve device.