JPH0539881A - Solenoid valve - Google Patents

Abstract

PURPOSE:To provide a simply structured small lightweight solenoid valve in which the number of part items is few in opening/closing a valve. CONSTITUTION:A hollow elastic spherical valve body 2a and magnetic fluid 2b sealed up in the valve body are provided in a valve chamber of an outer casing 1 provided with an inlet passage 3, an outlet passage 4 and coils 7. Next, support wire gauze 6 and 6 as a holding means are provided on the inlet/outlet sides along the spherical valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve, and in particular,
The present invention relates to a solenoid valve using a magnetic fluid.

[0002]

2. Description of the Related Art Conventionally, in this type of solenoid valve, as shown in FIG. 2, for example, an inlet 21 and an outlet 22 are formed at both ends of an outer cylinder 20, and a valve chamber 24 in a substantially central portion of the outer cylinder 20. The valve body 23 provided in the
1. The structure for opening and closing the space between the outlet 22 is provided.

The valve chamber 24 is formed so as to extend along the intersecting direction with respect to the inlet / outlet passages 21, 22.
A valve body 23 is slidably provided on the. Then, when the valve body 23 moves to the inlet / outlet side, the valve body 23 seals the space between the inlet 21 and the outlet 22 at its tip side.

The valve drive device 25 has a valve body 2 at one end thereof.
3, a shaft 26 engaging with 3, a core 27 provided on the other end of the shaft 26, and a winding 2 for applying a magnetic force to the core 27.
It is composed of 8 and. The winding wire 28 is attached to an inner wall of a housing 29 provided outside the outer cylinder 20 so as to face the valve chamber 24. A return spring 30 is provided between the shaft 26 and the valve body 23.
3 is biased in the closing direction. A flanged pipe joint 31 is formed on the inlet / outlet side of the inlet / outlet passages 21 and 22 of the outer cylinder 20.

Next, the operation of the above prior art will be described. When a current flows through the winding 28, excitation occurs inside the winding 28, and the iron core 27 is pulled upward in the figure. Since the valve body 23 is connected to the iron core 27 via the shaft 26, the valve body 23 moves upward together with the iron core 27. As a result, the inlet 21 and the outlet 22 communicate with each other, and a fluid (not shown) flows between the inlets 21 and 22.

When the current flowing through the winding 28 is stopped, the return spring 30 moves the valve body 30 to the lower side in FIG.
As a result, the inlet / outlet paths 21 and 22 are sealed, and the flow of fluid is blocked.

[0007]

However, the above-mentioned conventional solenoid valve requires a large number of parts to open and close the valve for shutting off the flow of fluid, so that the structure is complicated and the size becomes large. There was a problem that it became heavy. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a solenoid valve which has a small number of parts, a simple structure, and a small size and light weight for opening and closing the valve.

[0008]

In order to achieve the above object, the invention according to claim 1 provides a valve chamber between the passages, which has passages for inflow and outflow of a fluid at both ends. An outer cylinder and a valve provided in the valve chamber of the outer cylinder to open and close between the passages, and magnetic field generating means for applying a magnetic field to the valve is provided in the outer cylinder, and the valve is an elastic hollow A valve-shaped valve body and a magnetic fluid enclosed in the valve body. When the magnetic field is applied, the magnetic fluid deforms in a direction to close the passages, Holding means for holding the valve at a position that does not close the passages when the valve body is pressed against an inner wall forming the valve chamber against the elastic force and the valve is not receiving the magnetic field. It is provided in the valve chamber.

[0009]

In the invention according to claim 1 configured as described above, when a magnetic field is generated from the magnetic field generating means provided in the outer cylinder, the magnetic fluid enclosed in the valve body of the valve receives the magnetic field and the magnetic field The valve body is deformed along the direction and is pressed against the inner wall forming the valve chamber against the elastic force of the valve body. As a result, the passages for the inflow and outflow of the fluid are closed, and the flow of the fluid is blocked. On the other hand, when the magnetic field from the magnetic field generator disappears, the valve returns to its original shape due to the elastic force of the valve body,
The holding means holds the valve in a position where the passages are not closed. As a result, the open state between the passages is secured, and the fluid flows in and out.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The solenoid valve of the present embodiment is configured by providing an outer cylinder 1 with a valve 2 that opens and closes a passage formed in the outer cylinder 1.

The outer cylinder 1 includes an outer cylinder body 1a having a circular cross section,
The outer tube body 1a is integrally formed with flange-shaped pipe joints 1b, 1b formed on both ends in the longitudinal direction. The pipe joints 1b and 1b are for connecting the solenoid valve and a pipe (not shown). Further, along the longitudinal direction of the outer cylinder 1, an inlet 3 for fluid inflow is formed on one pipe joint 1b side, and an outlet 4 for fluid outflow is formed on the other pipe joint 1b side. A valve chamber 5 is formed in the cylinder body 1a to communicate between the inlet 3 and the outlet 4.

The valve chamber 5 has a circular cross section whose diameter is larger than those of the inlet passage 3 and the outlet passage 4, and the valve 2 is arranged in this valve chamber 5.

The valve 2 is a hollow hollow valve body 2a having elasticity.
And a magnetic fluid 2b enclosed in the valve body 2a. In this embodiment, the valve body 2a is made of rubber and has a spherical shape. The magnetic fluid 2a changes its shape along the magnetic field. Therefore, since the magnetic fluid does not change its shape under the influence of the magnetic field, the valve 2 has a spherical shape (see FIG. 1).

On the inlet 3 and outlet 4 sides of the valve chamber 5, supporting wire nets 6 and 6 as holding means are provided so as to cross the inlet 3 and the outlet 4 along the spherical valve 2. The support wire nets 6 and 6 position the valve 2 by this, and when the valve 2 is in a spherical state, a fluid passage is entirely provided between the inner wall of the outer cylinder main body 1a and the valve 2. Is being secured.

The outer cylinder body 1a is provided with a winding 7 as a magnetic field generating means so that a magnetic field is generated in a direction intersecting with the passage of the fluid. The winding 7 is supplied with a current from a power source (not shown). I am supposed to receive it.

When a current flows through the winding 7, excitation occurs inside the winding 7 and a magnetic field is generated in the direction intersecting the passage, so that the magnetic fluid 2b in the valve body 2a is generated.
Deforms in the direction of the magnetic field, that is, in the direction of the winding 7, against the elastic force of the valve body 2a. As a result, the valve body 2a is pressed against the inner wall forming the valve chamber 5, the valve 2 closes the passage, and the flow of the fluid entering from the inlet 1 is blocked by the valve 2 as shown in FIG. It will be.

On the other hand, when the current supply to the winding 7 is stopped,
Since the valve body 2a has elasticity, it returns to the original state as shown in FIG.
Is held substantially at the center and a passage is formed between the valve 2 and the inner wall forming the valve chamber 5, so that the inlet 3 and the outlet 4 communicate with each other and the fluid is introduced into the inlet 3, the supporting wire mesh 6, the valve chamber. 5, the supporting wire mesh 6, and the outlet 4.

[0018]

As described above, according to the first aspect of the invention, since the valve body for sealing the passage is made of the elastic material capable of returning to its original shape, the conventional spring member is not required. It is possible to reduce the number of parts. Further, since the valve itself is deformed in the valve chamber, it is not necessary to move the valve with a long stroke as in the conventional case, so that the valve can be made smaller and lighter. ..

[Brief description of drawings]

FIG. 1 is a sectional view of the present embodiment showing a state where a valve is not subjected to a magnetic field.

FIG. 2 is a cross-sectional view of the present embodiment showing a state where the valve is receiving a magnetic field.

FIG. 3 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Outer cylinder 2 Valve 2a Valve body 2b Magnetic fluid 3 Inlet 4 Outlet 5 Valve chamber 6 Support wire mesh 7 Winding

Claims (1)

[Claims] 1. An outer cylinder having valve passages at both ends for allowing fluid to flow in and out, the valve chambers communicating between the passages; and the passages provided in the valve chamber of the outer cylinder. A valve for opening and closing, the magnetic field generating means for applying a magnetic field to the valve is provided in the outer cylinder, and the valve is composed of a hollow hollow valve main body and a magnetic fluid sealed in the valve main body. When the magnetic field is received, the magnetic fluid is deformed in the direction of closing the passages, and the valve body is pressed against the inner wall forming the valve chamber against the elastic force of the valve body. A solenoid valve is provided with a holding means for holding the valve in a position where the passages are not closed when the valve is not receiving the magnetic field.