JPH032074Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a solenoid valve used for controlling the opening and closing of fluids such as gas or liquid fuel.

(Prior art) A solenoid valve used for controlling the opening and closing of gas, etc. has a yoke and a suction plate facing each other and opens and closes the valve body using magnetic force. When the main body is formed by die-casting (casting) of aluminum or the like, it is common to form the valve opening valve seat part integrally. However, since the valve seat directly contacts the valve body to close the valve, the contact area requires particularly high-precision finishing, but the inside of the valve case body is narrow and has a complicated shape. In particular, it is extremely difficult to precisely process the valve seat portion by external polishing.

For this reason, conventional methods have often been used in which the valve seat body 50 is made separately and the end portion 51 is swaged or tightened with screws 52, as shown in FIGS. 3a and 3b. Not only does it require a lot of man-hours and costs are high, but the attachment of the suction plate to the valve seat and yoke is the final stage of the assembly process and is difficult to adjust, resulting in variations in the mounting position and unstable contact between the valve seat and valve rubber. However, there were problems with large variations in the closing function and flow characteristics.

(Technical Issues) Therefore, in the present invention, although the valve case body is molded by die-casting of aluminum or the like, the processing accuracy of the valve seat part is high, and the valve rubber and suction plate are attached to the valve seat and yoke. The technical challenge is to maintain stability by standardizing the position and to facilitate manufacturing, processing, and assembly.

(Technical Means) In order to solve the above-mentioned technical problem, the present invention is a separate molded product that integrally has a valve seat part and a pivot part in a valve case main body which has an inlet and an outlet. A movable valve body is mounted on the pivot portion of the inner case so as to be able to swing up and down, and a yoke is attached to the movable valve body so that it is activated by turning on and off the current to the electromagnetic coil. It is provided with opposing suction plates and a valve rubber attached to the valve seat portion of the valve opening.

(effect) The above technical means works as follows.

Gas flows from an inlet 1, passes through a valve 2, and flows out from an outlet 3.

When a current is passed through the electromagnetic coil 4, an electromagnetic force acts on the lower end surface 5a of the yoke 5, creating an attractive force and attracting the attraction plate 6. Therefore, since the valve body 7 moves upward using the pivot pin 9 of the pivot part 8 as a fulcrum, the valve rubber 10 moves upward against the valve seat 1.
Valve port 2 opens to separate from valve 1.

When the current of the coil 4 is turned off, the electromagnetic force of the yoke 5 against the suction plate 6, and thus the suction force, disappears, so the valve body 7 is pushed down by the action of the spring 12, and the valve rubber 10 is pressed against the valve seat 11. Karabenguchi 2
is closed and gas flow stops.

The movable valve body 7 is attached to the inner case 20 in advance using a pivot pin 9, and the valve rubber 10 is assembled into the valve opening valve seat 11 formed at the bottom of the inner case 20 so that it is set at an appropriate position. Then, it is fitted into the valve case main body 30 to form an integral body. Therefore, if the electromagnetic coil 4, yoke 5, etc. are then set in the outer case 40 and then connected to the main body case 30, the electromagnetic valve of the present invention can be easily and quickly assembled.

(effect) The present invention has the following unique effects.

To easily obtain a solenoid valve with high processing accuracy by fitting and combining a valve case body molded by die-casting of aluminum or the like with a resin-molded inner case integrally having a valve port valve seat part and a pivot part. I can do it.

The valve rubber can be assembled with proper contact with the valve seat, improving the stability of the closing ability and flow characteristics, and eliminating variations.

Since the inner case is made of synthetic resin and formed into a cage frame shape, it is possible to ensure a product with standardized specifications as a resin molded product with an integrated structure including the valve seat, pivot portion, and filter.

Assembly is simple and quick, and costs can be significantly reduced.

Problems such as poor casting of the valve seat and poor sealing can be resolved after die-casting.

Since no polishing is required, there is no generation of fine powder, and gas leakage due to the presence of fine powder can be prevented.

(Embodiment) The inner case 20 is formed in the shape of a bottomed basket frame with an open top, and is integrally provided with a valve port 2 having a valve seat 11 at the bottom. The pivot portion 8 is integrally provided with a projecting piece that projects inward, and has a pin hole 8a. The movable valve body 7 is pivotally attached with a pin 9 using this pin hole 8a. The suction plate 6 is fixed to the upper surface of the movable valve body 7,
The valve rubber 10 is attached to its lower side via a valve spring 13 so as to be freely movable. The suction plate 6 is made of a magnetic material.

Seal packing 1 for areas where gas leaks are likely to occur.
4, 15, and 16.

The filter 17 is formed by integrally forming a net or mesh on one side of the inner case 20.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional side view of the electromagnetic valve of the present invention, Figure 2 is an exploded perspective view of the inner case and movable valve body, Figure 3 a,
b is a sectional view showing a conventional valve port valve seat portion. 1...Inflow port, 2...Valve port, 3...Outflow port, 4
... Electromagnetic coil, 5 ... Yoke, 6 ... Adsorption plate,
7...Movable valve body, 8...Pivotal part, 9...Pin, 1
0... Valve rubber, 11... Valve seat, 20... Inner case, 30... Valve case body, 40... Outer case.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An inner case consisting of a separate molded product that integrally has a valve seat portion and a pivot portion is fitted into a valve case body that has an inlet and an outlet. A movable valve body is mounted on the pivot portion of the inner case so as to be able to swing vertically, and this movable valve body has a suction plate facing the yoke and a valve port that are operated by turning on and off the current to the electromagnetic coil. A solenoid valve characterized by having a valve rubber attached to a valve seat. (2) The solenoid valve according to claim 1, wherein the inner case is made of synthetic resin and is formed into a basket frame shape. (3) The solenoid valve according to claim 1, wherein the inner case is provided with a filter having a net or mesh structure at a portion corresponding to the inlet of the valve case body.