JPS61236977A - Pivot armature type direct-operated solenoid valve - Google Patents

Abstract

PURPOSE:To provide a solenoid valve resistant to a contaminative fluid and a corrosive fluid and having a long life, by completely separating a solenoid section from a valve section by means of a diaphragm sheet. CONSTITUTION:When a pivot type armature core 4 is swung in one direction by excitation of a solenoid 1, an end 6 of the armature core 4 is swung in the other direction. As a result, a diaphragm sheet 16 is moved away from one valve seat 11, and is seated on the other valve seat 13 to close the valve. On the other hand, when the solenoid 1 is deexcited to swing the end 6 of the armature core 4 in one direction, the diaphragm sheet 16 is moved away from the valve seat 13, and is seated on the valve seat 11 to close the valve. In the course of selecting two-way or three-way selection mode, there is no possibility of the armature core 4 being contaminated or corroded since the diaphragm sheet 16 completely separate the solenoid section 1 from a valve section 2, and the end 6 of the pivot type armature core 4 is positioned on the side of the solenoid section 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a pivot armature type direct-acting solenoid valve, and more specifically, it has excellent fluid shielding properties, contamination prevention performance against fluids, and use with corrosive fluids. This invention relates to improvements in solenoid valves that have corrosion resistance when exposed to corrosion.

(Prior art) As is well known, the pivot armature direct-acting solenoid valve is
It has been used in various industrial fields because of its simple structure, high efficiency, and no sliding parts. This pivot amateur method direct g
In the LJ type solenoid valve, the tip of the pivot type movable iron piece of the solenoid part faces the switching flow path in the valve body part, and the seat body at the tip of the pivot type movable iron piece is switched between one side and the other by energizing and demagnetizing the solenoid part. Seat them alternately on the valve seat,
It has a structure that opens and closes one port and the other port alternately,
In the conventional electromagnetic valve of this type, the sheet body at the tip of the pivot type movable iron piece is constructed by simply attaching rubber or resin to the tip.

[Problem that the invention seeks to solve]

Since the conventional technology has the above-mentioned structure, the valve seat has sufficient seating properties and fully exhibits the three-way or three-way switching function, but this pivot armature electromagnetic Since the solenoid part and the valve body part of the valve are not completely separated, there is a problem with fluid shielding, and there is also a problem in protecting the solenoid valve from contamination of the fluid from the solenoid part side of the solenoid valve, corrosive fluid, and contaminated fluid. There is a problem that it is not sufficient.

That is, in pharmaceutical manufacturing, microbial industry, and various other industries, it is necessary to protect fluids from contamination by various bacteria and impurities during transportation.

Follow! In the case of , since the fluid comes into contact with the pivot type movable iron piece,
In some cases, components were dissolved into the fluid and contaminated the fluid. On the other hand, when applied to corrosive fluids, there were problems such as accelerated corrosion of the pivot type movable iron piece and shortened its durability.

Therefore, the object of the present invention is to provide a pivot armature type direct-acting valve with complete fluid shielding properties, which can completely prevent contamination of the fluid from the solenoid valve side, and which has sufficient measures against contamination. Another object of the present invention is to provide a type solenoid valve that is resistant to contaminated fluids and corrosive fluids and has a long life.

(Means for solving the problems) In order to achieve the above object, the present invention has the following technical means.

That is, to explain with reference numerals corresponding to the embodiments, this solenoid valve has a solenoid part l having a pivot type movable iron piece 4, and a switching flow in which valve seats 11 and 13 are formed on one side and the other side. It has a valve body part 2 having a passage 7.

The tip 6 of the pivot type movable iron piece 4 projects into the switching channel 7 and faces each valve seat 11, 13. A diaphragm sheet body 16 is interposed between the solenoid part 1 and the valve body part 2 to separate them from each other, with the tip 6 of the pivot type movable iron piece 4 located on the solenoid part side. 1B, each valve seat 1
1.13 sheets are arranged alternately.

[Effect]

Based on such a configuration, the pivot type movable iron piece 4 moves in one direction I! by excitation of the solenoid part l. work This causes its tip 6 to move to the other side I! Then, the diaphragm seat body 1B separates from one valve seat 11 and seats on the other valve seat 13, thereby closing it. Therefore, the switching mode is different from the previous switching mode. When the solenoid part 1 is demagnetized, its tip 6 swings to one side, and the diaphragm seat body 16 separates from the other valve seat 13 and seats on one valve seat 11, thereby closing it. Therefore, the original switching mode is returned. In this way, in the process of enabling three-way or three-way switching mode, the diaphragm sheet body! 8 completely separates the solenoid part 1 and the valve body part 2, and the tip 6 of the pivot type movable iron piece 4 is located on the solenoid part side. Therefore, the components of the movable iron piece 4 do not come into contact with the fluid and cause contamination.Also, even if the fluid is contaminated or corrosive, the movable iron piece 4 on the solenoid side does not come into contact with the fluid, so no contamination occurs. Or corrosion is avoided.

(Embodiments) Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, a first embodiment of this pivot armature type direct-acting solenoid valve is shown in FIG.

At the center of the solenoid section 1, a pivot type movable iron piece 4 is pivotally supported by a fulcrum 3, and a solenoid 5 is disposed around the movable iron piece 4. The solenoid 5 itself is fixed by epoxy mold. The tip 6 of the above-mentioned Vivo Y) type movable iron piece 4 protrudes toward the switching flow path 7 of the valve body portion 2, and the rear end 8 of the movable iron piece 4 is biased by a return spring 9.

On the other hand, the valve body portion 2 is formed with a valve seat 11 connected to one port 10 on one side of the switching passage 7, and a valve seat 11 connected to the other port 12 on the opposite side. 3 is formed, and an opening 15 connected to another port 14 is formed in the center.

In such a pivot armature type direct-acting solenoid valve, the present invention has a pivot type movable iron piece 4 located on the solenoid part 1 side, and a part between the solenoid part 1 and the valve body part 2. A diaphragm sheet body 16 is provided for separation. That is, the diaphragm sheet body 1B has a circumferential portion 117 held between a lower portion 18 of the solenoid portion l and an upper portion 18 of the valve body portion 2, and a central portion 2 of the diaphragm sheet body 1B.
G is stretched in the switching channel 7 so as to extend around the tip 6 of the pivot type movable iron piece 4 that projects into the switching channel 7.

In the above, the peripheral portion 17 of the diaphragm sheet body 1B
There are various means for interposing and fixing the valve body between the solenoid part 1 and the valve body part 2, but one method is to form a positioning groove 21 in the concave upper part 19 of the valve body part 2, as shown in the example shown in the figure. However, it is conceivable to fit the protrusion 22 of the diaphragm sheet body 1B into this positioning groove 21 to securely hold the diaphragm sheet body te.

In addition, 23 in the figure is a manual switching means.

Based on this configuration, its operation will be explained. In the state shown in FIG. 1, the solenoid 5 is demagnetized, the pivot type movable iron piece 4 is tilted to the right as shown in the figure, and the diaphragm sheet body 18 around its tip 6 is is shown seated on one valve seat 11. Therefore the fluid is a port! It passes between the reef and Port 12. When the solenoid 5 is energized from this state, the pivot type movable iron piece 4 is attracted and tilted to the left against the return spring 9. Therefore, its tip 6 is switched to the opposite direction, and the diaphragm seat body 18 around the tip 6 seats on the other valve seat 13. Therefore, the fluid is a port!
Pass between 4 and Pau) 10.

In this way, three-way or three-way switching operation is possible, but according to the present invention, the diaphragm seat body 18 completely separates the valve body part 2 and the solenoid part 1, so that the switching flow is The fluid passing through path 7 is the solenoid part! There is no possibility that the fluid will flow into the side, and the fluid is completely shielded. As a result, if the fluid does not come into contact with the solenoid side members such as the tip 6 of the pivot type movable iron piece 4, contamination of the fluid is prevented, and conversely If the fluid is a corrosive or contaminated fluid, the solenoid side member will not be corroded or contaminated.

In order to prevent the above-mentioned contamination of the fluid, it is most preferable to make the diaphragm sheet body 1B made of tetrafluoroethylene resin, but other materials may also be selected.

The example in FIG. 2 is an example in which this solenoid valve is used as a pilot valve, in which one valve seat 11 is connected to one pilot flow path 24, and the other valve seat 13 is connected to the other viroft flow path 24. It is connected to In this case, a pilot operation is performed, but other aspects are substantially the same as the first embodiment shown in FIG.

〔Effect of the invention〕

As detailed above, according to the present invention, since the solenoid part and the valve body part can be completely separated by the diaphragm sheet body, there is an advantage that the fluid can be completely shielded, and as a result, the fluid from the solenoid part side is Contamination can be prevented, and even if the fluid is contaminated or corrosive,
No contamination or corrosion on the solenoid side.

[Brief explanation of drawings]

The attached drawings show embodiments of the present invention, and FIG. 1 is a longitudinal side view showing the first example, and FIG. 2 is a longitudinal side view showing the second example. Valve body part, 3 is the fulcrum,
4 is a pivot type movable iron piece, 5 is a solenoid, 6 is a tip,
7 is a switching flow path, 9 is a return spring, 11 is one valve seat), 13 is the other valve seat, and te is a diaphragm seat body. Mine Mezumi 2 Sekiyaku

Claims (1)

[Scope of Claims] The tip of the pivot type movable iron piece of the solenoid part is made to face the switching flow path in the valve body part, and the seat body at the tip of the pivot type movable iron piece is connected to one valve and the other by energizing and demagnetizing the solenoid part. In a solenoid valve that is seated alternately on a seat and alternately opens and closes one port and the other port, the tip of the pivot type movable iron piece facing the switching flow path is located on the solenoid part side, and the solenoid part and A diaphragm sheet body is interposed between the valve body parts to separate them from each other,
A pivot armature type direct-acting solenoid valve characterized in that the diaphragm seat body is alternately seated on one valve seat and the other valve seat by the movement of the seat at the tip based on the operation of a pivot type movable iron piece.