JPH025164Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of application) The present invention relates to an electric valve that opens and closes a valve using an electric drive device, particularly an electric valve that opens and closes a valve using rotational driving force, and can be used in various valve devices. .

(Prior Art and its Problems) A conventional electric valve has a rotary valve that is driven to rotate directly or indirectly by an electric motor, and employs a configuration in which the electric motor is directly attached to the valve device body.

This conventional type has the advantage of being able to open and close the rotary valve simply by controlling the ON/OFF of the electric motor, but if a large rotational torque is required, the electric motor becomes extremely large and the weight of the valve device increases. In addition, the weight of the electric motor acts on the piping, and the strength of the piping must be set larger than necessary.

(Problem) In order to eliminate this inconvenience, the present invention aims to make it possible to separate the drive energy generating section and the output section, and to make the output section lightweight.

(Means) The technical means of the present invention for solving the above problem is to use a rotary valve as the valve body built in the valve device, and to attach an annular shape on one side of the rotary valve in a plane perpendicular to its axis. An elastic plate is arranged concentrically with the axis, and an annular diaphragm is attached to the surface of the elastic plate, and this diaphragm is held unrotatably by the main body of the device. It is pressed into contact with a plate, and multiple vibrators are attached and fixed to the surface of the plate.
The output voltage from the high-frequency oscillator is input to each of these vibrators separately, the phase of this input value is shifted by a predetermined angle according to the number of vibrators, and the elastic plate is attached to either the rotary valve or the diaphragm. That's what happened.

(Operation) The above technical means of the present invention operates as follows.

When a predetermined output voltage is input from the high frequency oscillator to each vibrator, each vibrator vibrates with a predetermined phase shift.

This vibration is transmitted from the diaphragm to the elastic plate, and Rayleigh waves as shown in FIG. 2 are generated on the surface of this elastic plate, and the mass points thereof draw an elliptical orbit as shown in the figure.
This is because each vibrator has a predetermined phase shift.

Therefore, the elastic plate and the diaphragm or the elastic plate and the rotary valve move relative to each other, but since the diaphragm cannot rotate with respect to the main body of the device, the elastic plate and the rotary valve move relative to each other. However, only the rotary valve rotates in one direction.

When the valve rotates forward by a certain angle, the output from the oscillator is stopped and the rotary valve is also stopped.

Therefore, when the initial state is the fully closed state, this rotation causes the rotary valve to be fully opened, and the rotary valve is maintained in this fully open state.

Next, when the rotary valve is further rotated forward by a certain angle from this stop position and the rotary valve assumes the initial position or the same position, the rotary valve becomes fully open and the circuit configuration also returns to its initial state.

In this way, the rotary valve is rotated by a predetermined angle by turning the output from the oscillator on and off, thereby opening and closing the circuit.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

The high-frequency oscillator as the driving energy generating section and the vibration wave generating section as the driving section can be separated, and since this driving section drives the rotary valve using the mass point movement force of Rayleigh waves, it is different from the conventional one. Compared to drive systems using electric motors, it is smaller and can provide higher output.

(Example) Hereinafter, an example of the present invention will be described with reference to FIG.

The embodiment shown in FIG. 1 employs a closure 1 as a rotary valve, and shows an example of use in a gas tank.

An annular elastic plate 2 made of an elastic material such as rubber is attached and fixed to the end face on the large diameter side of the closure 1, and a diaphragm 4 urged downward by a spring 3 is in contact with the upper face of this annular elastic plate 2. .

In order to hold the diaphragm 4 in an unrotatable state with respect to the device body 5, in this embodiment, a pair of grooves 52 and 53 are vertically cut in a cylindrical portion 51 provided in the device body 5. A pair of tongue pieces 41 and 42 protruding from the diaphragm 4 are fitted into the groove, and both are connected to the closure 1.
They are arranged so that they are parallel to each other in the axial direction.

Further, the spring 3 that urges the diaphragm 4 downward is interposed between the adjustment screw 6 screwed into the cylindrical portion 51, and by adjusting this, the pressing force of the diaphragm 4 against the elastic plate 2 can be adjusted. , the driving torque can be adjusted. Further, in this embodiment, a pair of vibrators 4 are provided on the diaphragm 4.
3 and 44, and a 90 degree phase shift is provided in the input voltage from the high frequency oscillator 7 to each vibrator. As a result, Rayleigh waves in one direction are generated in the elastic plate 2, and the closure 1 is rotationally driven by the action described above.

Incidentally, instead of the above embodiment, the elastic plate 2 can be replaced with the diaphragm 4.
It is also possible to fix it on the side, in this case,
The upper surface of the closure 1 and the fixed elastic plate 2 move relative to each other, and the closure 1 is similarly rotated and closed.

Furthermore, as shown in FIG. 1, if the operating shaft 11 connected to the closure 1 is configured to protrude to the outside and the pressure applied by the spring 3 of the diaphragm 4 is released, this pressure may be adjusted as necessary. By releasing the handle 12 and rotating the handle 12 connected to the operating shaft 11, it can also be opened and closed manually.

In this case, the means for releasing the biasing force of the spring 3 include a method in which a tongue piece 45 is connected to the diaphragm 4 and protrudes outward, and a method in which the tongue piece 45 is forcibly pulled up, or a method in which the adjustment screw 6 is loosened. etc. can be adopted.

Next, when using three vibrators 43 and 44, the input phase from the oscillator may be shifted by 120 degrees.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the present invention, and Fig. 2 is an explanatory diagram of Rayleigh waves generated in an elastic plate.
... Closer, 2 ... Elastic plate, 3 ... Spring, 4 ... Vibration plate, 41, 42 ... Tongue piece, 5 ... Device main body, 5
2,53... Groove.

Claims (1)

[Scope of utility model registration request] The valve body built into the valve device is a rotary valve, and on one side of the rotary valve, a ring-shaped elastic plate is placed on a plane perpendicular to the axis of the rotary valve, concentrically with the axis, and the surface of the elastic plate is An annular diaphragm is attached, this diaphragm is held unrotatably by the main body of the device, this diaphragm is pressed into contact with an elastic plate by a spring, and a plurality of vibrators are attached and fixed to the surface of the diaphragm. death,
The output voltage from the high-frequency oscillator is input to each of these vibrators separately, the phase of this input value is shifted by a predetermined angle according to the number of vibrators, and the elastic plate is attached to either the rotary valve or the diaphragm. electric valve.