JPH0479A - Solenoid valve device - Google Patents

Abstract

PURPOSE:To stabilize and speed up operation of movable plunger and thereby to have a sound insulation effect upon high frequency operation by coating with a nonsticking resilient resin the outer circumferential part of a fixed iron core, especially at its contact end face part with a movable planger, and the contact part of a valve seat with the movable planger. CONSTITUTION:Numerals 20a, 20b, 20c are nonsticking resilient resin wherein 20a is a resin coat applied onto both or one of faces of the outer peripheral part of a fixed iron core 4, especially at the contact end face part thereof with a movable planger 3, 20c is a resin coat applied on a side of a bobbin 7. The coating reduces the sticking effect of control fluid having viscousity as possible as can to attain stable and speedy operation of the movable planger. The resiliency of the non-sticking resin absorbs the striking sound of the planger 3 and the sheet against the core 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to smooth operation of a movable plunger in a solenoid valve device.

[Conventional technology]

FIG. 4 is a sectional view showing a conventional solenoid valve device.

In the figure, 1 is a yoke, 2 is a plate, 3 is a movable plunger, 4 is a fixed core, 5 is a valve seat, 6 is a spring, 7 is a bobbin, 8 is a solenoid coil, 9 is a lead wire, 10 is an O-ring, 11 is an input hole, and 12 is a discharge hole.

Next, the operation will be explained. When current is applied to the solenoid coil 8, the yoke 1, plate 2, movable plunger 3,
The fixed iron core 4 forms a magnetic circuit, and the fixed iron core 4 is energized to move the movable 1 lange 3 against the spring 6.
Let it be sucked into. When the current flowing through the solenoid coil 8 is stopped, the fixed core 4 releases the movable plunger 3, and the movable plunger 3 is pushed forward by the elasticity of the spring 6. In this way, the energization by the solenoid coil 8,
In response to the deenergization, the tip of the movable plunger 3 opens and closes the input hole 11. Therefore, when the valve is opened, the control fluid flows in through the input hole 11 and flows out through the discharge hole 12. When the valve is closed, the flow of control fluid stops.

[Problem to be solved by the invention]

Since the conventional solenoid valve device is configured as described above,
When the movable plunger 3 separates from the fixed core 4 and the valve seat 5, it is affected by adhesion due to the viscosity of the control fluid.
Stable and quick movement of the movable plunger 3 was hindered. Since the viscosity of oil increases when the temperature is low, this phenomenon was particularly noticeable at low temperatures below 0°C.

Furthermore, since the movable plunger 3 operates at a high frequency, there is a problem in that the noise generated when the movable plunger 3 hits the valve seat 5 and the fixed iron core 4 is large.

This invention was made to solve the above-mentioned problems.
Another object of the present invention is to provide a solenoid valve device that enables stable and rapid movement of a movable plunger and prevents noise when the movable plunger hits a valve seat and a fixed iron core.

[Means to solve the problem]

In the electromagnetic valve device according to the present invention, the facing portions of the movable plunger, the fixed core, and the valve seat, and the sliding portions of the movable core and the bobbin are coated with an elastic, non-adhesive resin.

[Effect]

In the solenoid valve device configured as described above, the movable plunger operates without being affected by the stickiness of the control fluid, and the operation of the movable plunger is stabilized.

It is possible to speed up the process, and also to absorb the noise that occurs when the solenoid valve is driven at high frequency.

〔Example〕

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

FIG. 1 is a sectional view of a solenoid valve device according to an embodiment of the present invention. In FIG. 20b is a resin coated on both or one of the contact portions of the valve seat 5 with the movable plunger 3; 20c is a resin coated on the side surface of the bobbin 7 (e.g. tetrafluoride); - ethylene resin).

Further, in FIG. 2, the outer periphery of the movable plunger 3, particularly the contact end surface between the fixed core 4 and the valve seat 5, and the side guide portion of the movable plunger 3 are coated with a non-adhesive resin 20d.

By coating with the non-adhesive resin as described above, the influence of adhesion due to the viscosity of the control fluid (especially at low temperatures below 0°C) can be minimized, and stable and rapid operation of the movable plunger 3 can be achieved. It is something. Furthermore, since the non-adhesive resin has elasticity, it also has the effect of absorbing noise when the movable plunger 3 hits the valve seat 5 and the fixed core 4.

By coating the side guide portion of the movable plunger 3 or the side surface of the bobbin 7 with the resin, the sliding resistance of the sliding portion of the movable plunger 3 can be reduced, and further stable operation of the movable plunger 3 can be achieved. It will be done.

As shown in FIG. 3, if the shape of the resin coating applied to the end face of the fixed core, the end face of the movable plunger, and the end face of the valve seat is made uneven,
The contact area becomes smaller, and it is possible to reduce adhesion of the control fluid. In this case, the same effect can be obtained even if only one of the contacting surfaces is made uneven.

〔Effect of the invention〕

As described above, according to the present invention, by coating the movable plunger etc. with an elastic non-adhesive resin, the movable plunger operates without being affected by the adhesion of the control fluid, and the operation of the movable plunger is stabilized. , speed can be achieved, and a soundproofing effect can be obtained when the solenoid valve is driven at high frequency.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a solenoid valve device according to one embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views showing other embodiments of the present invention, and FIG. 4 is a cross-sectional view of a conventional solenoid valve device. It is a diagram. In the figure, 3 is a movable plunger, 4 is a fixed core, 5 is a valve seat, 7 is a bobbin, 8 is a solenoid coil, 20a,
20b, 20c, and 20d are non-adhesive resins. Note that the same reference numerals in the figures indicate the same or equivalent parts. J J17' Runsha Figure 1 Figure 3 Figure 2 Figure 20d: 4) The customer also has 1 bottle of J Shijima Figure 4

Claims (1)

[Claims] A cylindrical bobbin around which a coil is wound, a fixed iron core and a movable plunger arranged opposite to each other on the inner periphery of the bobbin via a spring, and a valve seat that comes into contact with and separates from the movable plunger. A solenoid valve device characterized in that a facing portion of a fixed core and a valve seat, and a sliding portion of the movable core and bobbin are coated with an elastic, non-adhesive resin.