JP2593561Y2 - One-way valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way valve which is connected to a control circuit for various fluids and is used for opening or closing a flow path.

[0002]

2. Description of the Related Art A one-way valve which has been conventionally used as a one-way valve used for opening or shutting off a flow path includes a poppet as a valve body in a body having an inlet and an outlet for fluid, and the poppet as a valve. In general, there is provided a valve seat to be seated, and a poppet is pressed by a spring in a direction of seating on the valve seat. In this case, it has been a general structure to attach an O-ring to the poppet so that no gap is formed between the outer periphery of the poppet and the body.

[0003]

As described above, in the one-way valve having the structure in which the O-ring is mounted between the outer periphery of the poppet and the body, processing of the poppet sliding portion and the O-ring mounting portion of the body is performed. Accuracy must be increased, and if this is not sufficient, fluid leakage will occur during shutoff. As described above, in order to increase the processing accuracy, there is a problem that the number of manufacturing steps is increased and the cost is increased.

Since an O-ring is used, the O-ring may cause a so-called permeation phenomenon or cause a chemical reaction with the fluid over a long period of use, leading to leakage. Therefore, it is necessary to limit the type of fluid used. did.

The present invention has been made in view of such circumstances, and uses a one-way valve for opening or shutting off a flow path without being affected by a decrease in machining accuracy and finish accuracy, and using the same. An object of the present invention is to provide a one-way valve that is not affected by the type of fluid.

[0006]

According to the present invention, as a means for solving the above problems, a poppet as a valve body and a valve seat on which the poppet is seated are provided in a body having a fluid inlet and an outlet. in the one-way valve provided, before the molten material melts by heat on the sliding portion of the poppet of the body
Make sure there is no gap between the outer periphery of the poppet and the body
In the vicinity of the molten material application portion of the body,
An electric heater for generating heat for melting the molten material.
Disposed and adsorbs the molten material in the vicinity of the fluid outlet
A filter is provided, and the shoulder of the poppet and the valve are provided.
Compression spring installed between the seat and the outer periphery
It was a good thing.

[0007]

With this configuration, when the electric heater is energized to generate heat, the heat melts the molten material. The molten material releases the force holding the poppet against the body, so that the poppet can move within the body. At this time, if a fluid pressure acts on the poppet from the inflow port in the direction of seating the poppet on the valve seat, the poppet sits on the valve seat and allows the flow of fluid. This place
In this case, the filter provided near the fluid outlet
Adsorb the melted material. In addition, the poppet shoulder and valve seat
The compressed spring mounted between the outer peripheral part
Return the poppet to its original position after the pressure disappears.

[0008] Because of this action, the processing accuracy and finishing accuracy of the poppet sliding surface of the body are not affected. In addition, the use of the O-ring, which is indispensable in the conventional structure, becomes unnecessary.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1. Reference numeral 1 denotes a body, which is composed of a main body 1a and a lid 1b fixed to the main body 1a with bolts (not shown). The body 1 is provided with a fluid inlet 2 and a fluid outlet 3. An inflow pipe 4 is connected to the inflow port 2, and an outflow pipe 5 is connected to the outflow port 3. A valve chamber 6 is formed inside the body 1, and a protruding portion 7 protrudes into the valve chamber 6.

A valve seat 8 is formed at the tip of the protruding portion 7, and a poppet 9 as a valve element is seated on the valve seat 8 (see FIG. 2). Numeral 10 denotes a cylindrical filter which is fitted in the grooves 11 and 12 of the body 1 at both ends to prevent a later-described molten material from flowing from the valve chamber 6 side to the outlet 3 side together with the fluid. .

A sliding portion 13 is formed in connection with the inflow port 2 of the body 1, and the sliding portion 13 is provided with the above-described poppet 9.
Is mounted on the outer periphery. The mounting portion is coated (filled) with a molten material 14 that is melted by heat. In the vicinity of the body 1 where the molten material 14 is applied,
A chamber 15 for melting the molten material 14 is formed. This chamber 15 has an electric heater 16 that generates high heat when energized.
Is provided.

The one-way valve thus configured is connected so that fluid is introduced from the pipe 4 side and fluid is discharged from the pipe 5 side, as indicated by "IN" and "OUT" in the drawing. use. When fluid pressure is applied to the back of the poppet 9 as indicated by reference numeral 17, the poppet 9 tends to move to the left in the figure, but the molten material existing around
14 is solid state (or semi-solid state with extremely high viscosity)
And the poppet 9 cannot move because it is larger than the fluid pressure.

When the poppet 9 is moved to move the fluid from the inlet 2 to the outlet 3, the electric heater 16 is energized to generate high heat. The heat melts the molten material 14. If the molten material 14 is melted, the poppet 9 moves, and its tip is seated on the valve seat 8 of the projection 7 as shown in FIG. As a result, a gap is formed between the sliding portion 13 and the outer periphery of the poppet 9, so that the fluid flows as shown by the arrow in FIG. The filter 10 adsorbs the molten material 14 mixed in the fluid.

The embodiment described above is omitted from the drawing because it is disposed once when used. However, in order to use this one-way valve again, the shoulder of the poppet 9 and the protrusion 7 are required. If a spring in a compressed state is mounted between the poppet 9 and the outer peripheral portion of the valve seat 8, when the poppet 9 is released from the fluid pressure, the poppet 9 returns to the original state, and can be reused.

[0015]

Since the present invention is a one-way valve configured as described above, the use of a molten material eliminates the need to increase the processing accuracy and finishing accuracy of the sliding portion of the poppet. Since the O-ring becomes unnecessary, the conventional problem caused by using the O-ring can be solved. And close to the fluid outlet
The filter has been used to
The fluid that passes through this one-way valve absorbs the flux.
Can effectively prevent molten material from entering
You. And furthermore, the shoulder of the poppet and the outer periphery of the valve seat
The compressed spring installed between
Return the poppet to its original position.
It is in a state suitable for reusing the one-way valve.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing an operation state of the apparatus shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Inflow port 3 Outflow port 6 Valve room 8 Valve seat 9 Poppet 13 Sliding part 14 Melting material 15 Room 16 Electric heater

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16K 31/64 F16K 17/38

Claims (1)

(57) [Scope of request for utility model registration] 1. A one-way valve in which a poppet as a valve body and a valve seat on which the poppet sits are provided in a body having a fluid inlet and a fluid outlet and which is melted by heat in a sliding portion of the poppet of the body. Poppet with the molten material
Apply so that there is no gap between the outer circumference of the body and the body ,
An electric heater for generating heat for melting the molten material is disposed in the body in the vicinity of the molten material application portion ,
A filter that adsorbs the molten material in the vicinity of the outlet of the fluid
And a shoulder portion of the poppet and an outer peripheral portion of the valve seat.
It is characterized by attaching a compressed spring between
One-way valve to do.