JPH05223184A - Electromagnetic valve - Google Patents

Abstract

PURPOSE:To provide an electromagnetic valve which can be operated by weak force and easily sealed securely. CONSTITUTION:An electromagnetic valve comprises a valve body unit consisting of a valve body 1 which is formed of flexible material integratedly and a seal part 9, an actuator 10 mounted on the valve body unit, and a spring 17 acting on the actuator 10 in one direction and opening and closing of the valve are performed by electromagnetic force via the actuator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve which can be operated with a weak force.

[0002]

2. Description of the Related Art A general structure of a conventional solenoid valve is as shown in FIG. 5, taking a two-way valve as an example. As shown in this figure, the conventional solenoid valve has a coil 2 inside a case 21.
2, a slidable armature 23 is arranged therein, and a rod 24 is arranged at the tip thereof, and the rod 24 is moved by sliding of the armature 23. Further, a valve body 25 is provided at the tip of the rod 24.
The valve body 25 moves integrally with the valve body 27 to open and close the valve seat 27 formed on the base 26 of the main body 21. Reference numeral 28 is a coil frame, 29 is a yoke, 30 is a core, and 31 is a spring. 32 is an inflow port and 33 is an outflow port. Reference numeral 34 is a valve chamber seal member 36 for sealing the valve chamber 35, which is an O-ring 36.
And is sealed by 38.

In this valve, when the coil 22 is energized and excited, the valve body 25, which is pressed against the valve seat 27 by the spring 31 to close the valve, is slid on the armature 23 to open the valve body 25 through the rod 24. When the energization is stopped, the valve is closed by the force of the spring 31.

[0004]

In such a conventional solenoid valve, the valve seat is closed by the force of the spring 31, and the armature 23 is moved against the force of the spring 31 to move the valve through the rod 24. Move body 25 to open the valve.
In this conventional solenoid valve, the pressure in the valve chamber works in a direction to push up the armature 23 with a force proportional to the cross-sectional area of the rod 24. Therefore, the spring 31 pushes down the valve body 25 to close the valve seat 27. , The force in the direction of pushing up the armature 23 due to the pressure inside the valve chamber must be larger than the force. Therefore, the force due to the excitation of the coil for pulling up the armature 23 must be greater than the force of this strong spring. Further, a sealing member for maintaining the airtightness of the valve chamber must be provided on a moving member such as a rod.

An object of the present invention is to provide an electromagnetic valve in which the force required to open the valve by the coil does not need to be so strong and the valve chamber can be easily sealed.

[0006]

SUMMARY OF THE INVENTION A solenoid valve according to the present invention is a valve for opening and closing a valve disposed in a seal portion which is integrally formed of a flexible material and seals a valve chamber from the outside. A valve body portion formed of a body, an activator that is integrally attached to the valve body portion and can rotate in a direction substantially perpendicular to the acting direction of pressure in the valve chamber, and closes the valve body with respect to the actuator. A spring that acts in a direction, and is designed to act in a direction to open the valve body with respect to the actuator by an electromagnetic force. The action on the actuator is in a direction substantially perpendicular to the action due to the pressure in the valve chamber. Therefore, the valve can be opened and closed with extremely weak force.

[0007]

Embodiments Next, embodiments of the solenoid valve of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a first embodiment of the present invention. The first embodiment is a case where the present invention is applied to a three-way valve. In this figure, reference numeral 1 denotes a main body, which constitutes a valve chamber 2 inside. In addition, 3, 4 and 5 are inlets,
The first outlet and the second outlet, and valve seats 6 and 7 are formed at the portions of the first and second outlets 4 and 5, respectively. Reference numeral 8 denotes a valve element arranged in the valve chamber 2 which is made of a flexible material and integrally provided with a seal portion 9 for sealing the valve chamber 2 from the outside. Reference numeral 10 is an actuator, which is a seal portion 9 and a valve body 8.
Are inserted into a hole 11 formed in the integrated valve body, and are integrally attached to this valve body.

Further, 12 is wound around a coil frame 13 and a yoke 15 is formed.
Is a core, 14 is an armature attached to the tip of the actuator 10, 17 is a coil spring, and 18 is a leaf spring connecting the actuator 10 and the armature 16.

In the above-described embodiment, when the coil 12 is energized and excited, the iron core 14 attracts the armature 16 against the force of the coil spring 17 and rotates the actuator 10 as shown in FIG. The valve body 8 is moved up in the figure to move from the valve seat 6 side to the valve seat 7 side to close the valve seat 7. That is, the second outlet 5 is closed and the first outlet 4 is opened. This switches the fluid from flowing from the inlet 3 through the valve chamber 2 to the first outlet, to flowing from the inlet 3 through the valve chamber to the first outlet.

In this embodiment, the valve body is made of a highly flexible material such as rubber or soft synthetic resin having the shape shown in FIG.

In each of the states shown in FIGS. 1 and 2, it is necessary that the valve body 8 is crimped to the valve seat 6 or 7 so that no fluid flows from the outlet on the crimped side. In order to prevent damage to the valve body 8 and other adverse effects when the valve body 8 is strongly pressed against the valve seat 7 in the state of FIG.
The actuator 10 and the armature 16 are provided with a leaf spring 18
And the leaf spring 18 is bent as shown in FIG. Further, this leaf spring is made of non-magnetic metal so as not to cause a return failure due to residual magnetism when the coil is energized.

If the valve body is moved by the rotation of the actuator as in this embodiment, it can be moved with a weak force. Therefore, the spring 17 may have a weak force, and a coil is used. Electromagnetic power is also weak. Further, since the seal portion 9 and the actuator 10 move integrally, the valve chamber is completely sealed.

FIG. 4 shows a second embodiment in which the solenoid valve of the present invention is applied to a two-way valve. That is, only the first outlet is provided and the second outlet is not provided. Therefore, the flow of the fluid from the inflow port to the first outflow port and the stop thereof are switched. However, the operation of the valve body and the actuator, the operation of sealing the valve chamber, and the like are the same as those in the first embodiment. Further, in this embodiment, the actuator and the armature can be integrated.

[0015]

The solenoid valve of the present invention can be operated with a weak force, and the valve chamber and the like can be sealed more reliably.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which the valves of the first embodiment are switched.

FIG. 3 is a perspective view of a valve body portion used in the embodiment.

FIG. 4 is a sectional view of a second embodiment of the present invention.

FIG. 5 is a sectional view of a conventional solenoid valve.

[Explanation of symbols]

 1 Main Body 2 Valve Chamber 3 Inlet 4 First Outlet 5 Second Outlet 6 Valve Seat 7 Valve Seat 9 Sealing Part 10 Actuator 12 Coil 17 Coil Spring

Claims (1)

[Claims] 1. A valve body portion integrally formed of a flexible material and having a seal portion for sealing the valve chamber to the outside and a valve body for opening and closing a valve disposed in the valve chamber, An actuator that is integrally attached to the valve body and is rotatable in a direction substantially perpendicular to the acting direction of the pressure in the valve chamber, and a spring that acts in one direction with respect to the actuator, An electromagnetic valve that opens and closes a valve via the actuator by electromagnetic force.