JPH035740Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solenoid valve in fluid control, particularly to a two-way latch type solenoid valve.

Conventionally, for two-way latch type solenoid valves,
In order to open and close a valve, many coils use a plurality of first and second coils, and the first coil is first energized to open the valve, and then the energization is continued or adsorption is performed. Therefore, a permanent magnet is used to stop the valve, and by energizing the second coil, an excitation force that exceeds the attraction force of the permanent magnet is applied to close the valve. It was necessary to use it or keep the power on. Alternatively, when a single coil is used, the electric circuit becomes complicated because the solenoid valve is opened and closed by controlling the direction of current flowing through the excitation coil. These conventional methods have been recognized as having merits because they only require electrical control, but they require an increase in the number of parts used, two coils, and a circuit to change the direction of the current. There were considerable disadvantages, especially in terms of cost.

In addition, as a solenoid valve, a permanent magnet is used in addition to a solenoid, and the valve is switched by the solenoid, and the state maintenance after switching is maintained by the attraction force of the permanent magnet. 79725, but all these controls rely solely on solenoid control.

In view of the above-mentioned points, the purpose of this invention is to manually perform only the flow passage closing operation using the valve, while maintaining the latch and other operations, reducing the number of parts, and preventing the complexity of the electric circuit. An object of the present invention is to provide a two-way latch type solenoid valve.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of the embodiment of the present invention, showing the valve in the open state, FIG. 2 similarly showing the state in which the valve is closed, and FIG. 3 similarly showing the valve in the closed state. FIG. 4 is a perspective sectional view of the iron core block.

Reference numeral 1 denotes a first nipple, which is made of a magnetic material, has a flow path 1a therein through which fluid passes, and is assembled to the yoke 2.

A coil 3 constitutes an electromagnetic device together with the bobbin 4, and is excited by electricity from a power supply control circuit (not shown).

Reference numeral 5 denotes an iron core, which is made of a magnetic material and has a groove forming a flow path 5a, and a permanent magnet 6 having a shape (for example, a semicircle) that can create a fluid path is arranged on the right side in the drawing. The iron core 5, the permanent magnet 6, and the valve 7 are integrally constructed.

Reference numeral 8 denotes a second nipple, which is made of a magnetic material and has a flow path 8a through which fluid passes inside. A valve seat 8b is formed. Further, it is possible to slide leftward by a pressing force from the direction of the arrow, and the maximum stroke of the movement is limited by the right end of the bobbin 4.

A nipple stopper 9 supports the second nipple 8 so as to be slidable in the left-right direction, and is combined with the yoke 2 to form a casing of the solenoid valve.

Reference numeral 10 denotes a nipple presser, which is made of an elastic body and has a force that presses the second nipple 8 in the direction of the nipple stopper 9, and the second nipple 8 is moved to the left by the force in the direction of the arrow. When the force stops after being pushed in, the second nipple 8 is pushed back to its original position by the repulsive force due to its elasticity.

Note that "→" shown in several places in the drawings is for making the flow path easier to understand, and does not necessarily limit the direction of the fluid.

The operation of the embodiment of the present invention will be explained below.

First, FIG. 1 shows a state in which the valve is open and fluid is flowing.

The valve 7 is separated from the valve seat 8b of the second nipple 8 because the integrally formed iron core 5 and permanent magnet 6 are attracted to the first nipple 1 side. Therefore, the fluid passes through the channels 1a, 5a, and 8a.

Next, the operation for shutting off the valve will be explained.

In FIG. 1, a pushing force is manually applied to the second nipple 8 in the direction of the arrow. Then, the second nipple 8 is moved to the left while resisting the elasticity of the nipple presser 10. Valve seat 8 of second nipple 8
When b contacts or approaches the permanent magnet 6, the attractive force between the second nipple 8 and the permanent magnet 6 is set to exceed the attractive force between the second nipple 1 and the first nipple 1, and the permanent magnet The magnet 6 separates from the first nipple 1 and moves to attract the second nipple 8. At this time, the valve 7 comes into close contact with the valve seat 8b of the second nipple 8 as shown in FIG. 2, blocking the inflow (output) of the fluid and stopping the flow of the fluid.

When the force that has been applied to the second nipple 8 is removed from the state shown in FIG. 2, the second nipple 8 comes into contact with the nipple stopper 9 and stops due to the elastic repulsive force of the nipple presser 10. Return to position. The iron core 5 and the permanent magnet 6 are arranged so that the attraction force between the permanent magnet 6 and the second nipple 8 exceeds the attraction force between the permanent magnet 6 and the first nipple 1. As 8 tries to return to its original position, it moves to the right. Of course, the valve 7 remains closed to the inlet (outlet) of the second nipple 8.

FIG. 3 shows this closed state.

In order to open the valve and return to the situation in FIG. Overcoming the suction force, move the iron core 5 to the left and move the valve 7 to the second nipple 8.
When separated and opened, the flow path is connected and the fluid begins to flow again.

Thereafter, even if the current to the coil 3 is cut off, the iron core 5 remains attracted to the first nipple 1 due to the attractive force of the permanent magnet 6.

It should be noted that if the present invention is considered to have a configuration without a valve structure, an effective two-way latch type plunger can of course be obtained.

Furthermore, the direction in which the fluid moves is not limited to "→" in the diagram, and by locating the valve to the left of the iron core in the diagram, a solenoid valve whose operation is opposite to that of the embodiment can be created. can get.

As is clear from the above description, the solenoid valve according to the present invention can reliably latch the flow path in both the open and closed states. Since the valve is closed by moving the second flow path forming material manually, using the elasticity of the elastic member, and the magnetic force of the permanent magnet, only one electric circuit is required for sliding the valve in one direction. Therefore, a solenoid valve with a simple circuit configuration without an increase in the number of parts can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the valve in the open state according to the embodiment of the present invention, FIG. 2 is a sectional view showing the valve in the closing state, and FIG. 3 is a sectional view showing the valve in the flow path. FIG. 4 is a cross-sectional view showing the iron core block in a closed state. 1...First nipple, 2...Yoke, 3...Coil, 4...Bobbin, 5...Iron core, 6...Permanent magnet, 7...Valve, 8...Second nipple, 9...Nipple stopper , 10...Nipple presser foot.

Claims (1)

[Claim for Utility Model Registration] A solenoid valve that is installed in the middle of a fluid passage and uses an electromagnet to pass and block the fluid flow, which has a fluid flow passage on its inner diameter and is free from magnetic material. a first connecting member made of a magnetic material, which has a fluid flow path on its inner diameter, is capable of sliding back and forth in response to external pressure, and serves as a fluid flow path. an iron core provided with a groove and capable of sliding back and forth between the first connecting member and the second connecting member; and an iron core having a groove connected to a flow path of the iron core. a permanent magnet integrally provided on the second connecting member side of the core; and a permanent magnet provided on either the second connecting member side of the permanent magnet or the first connecting member side of the iron core. an elastic member having a force acting in a direction to separate the permanent magnet and the second connecting member; and an elastic member that supports the iron core so as to be able to reciprocate and slide the coil; A two-way latch type solenoid valve consists of an electromagnet device, a case containing the electromagnetic device, and a case containing the electromagnet device.