JPH09133242A - Solenoid valve device - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent corrosion of the opposing connection surface 3E that is in contact with the end plate 2 of the mounting flange portion 3A of the valve body 3 formed of an aluminum material. [Structure] A flat carbon gasket 20 is arranged between a facing connection surface 2C of an end plate 2 made of an iron material and a facing connection surface 3E of a mounting flange portion 3A of a valve body 3 made of an aluminum material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottomed cylindrical housing made of a magnetic material, having a bottom at one end and an opening at the other end, and an end made of an iron-based material disposed in the opening of the housing. A plate, an end plate, a valve body made of an aluminum material, which is arranged to face each other via a flange portion; a coil bobbin around which a coil is wound and arranged in a housing; and a coil bobbin fixed to the bottom of the housing. A fixed core that projects inside, a movable core that is movably arranged in the coil bobbin and that faces the fixed core, and moves in synchronization with the movable core to open and close the valve seat of the valve body. The present invention relates to a solenoid valve device having a valve body for controlling.

[0002]

2. Description of the Related Art A conventional solenoid valve device will be described with reference to FIG. Reference numeral 1 denotes a housing having a bottom portion 1A at one end (upper side in the drawing) and an opening portion 1B at the other end (lower side in the drawing), and an annular locking step portion 1C extending toward the other end is formed in the opening portion 1B. Further, the housing 1 is made of a magnetic material such as an iron plate. Reference numeral 2 is a disk-shaped end plate made of an iron-based material, and a packless pipe insertion hole 2A is formed in the center thereof so as to penetrate therethrough. Reference numeral 3 is a valve body having a mounting flange portion 3A above the valve seat 3D and dividing a flow passage formed inside into a first flow passage 3B and a second flow passage 3C. Is formed by casting an aluminum material. The end plate 2 is disposed on the locking step portion 1C of the housing 1, and one end of the mounting flange portion 3A of the valve body 3 (on the opposite connection surface 2C on the other end side (downward) of the end plate 2 ( Opposing connection surface 3E formed on the upper side)
And then the end 1D of the opening 1B of the housing 1 is swaged inward toward the mounting flange 3A, whereby the end plate 2 and the valve body 3 are integrally attached to the housing 1. It Reference numeral 4 denotes a cylindrical fixed core whose one end is caulked to the center of the bottom portion 1A of the housing 1 and whose other end projects into the housing 1.
A packless pipe 5 that enters the valve body 3 through the housing 1 and the packless pipe insertion hole 2A of the end plate 2 and the mounting flange portion 3A of the valve body 3 is arranged on the outer periphery of the. Then, the other end surface 4A of the fixed core 4
A movable core 6 is movably arranged in the packless pipe 5 while facing the
A spring 7 is contracted between A and one end of the movable core 6. That is, the movable core 6 is biased by the spring 7 in a direction away from the other end surface 4A of the fixed core 4. Reference numeral 8 is a valve body integrally attached to the movable core 6,
The valve body 8 is arranged to face the valve seat 3D, and normally, the valve seat 3D is closed and held by the spring force of the spring 7.

Reference numeral 9 is a coil bobbin made of a synthetic resin material, and includes a cylindrical portion 9A, an upper collar portion 9B formed above the cylindrical portion 9A, and a lower collar portion 9C formed below the cylindrical portion 9A. Formed by and the cylindrical portion 9A
The coil 10 is wound around the outer circumference of the coil 1.
The winding start wire of 0 is connected to the coupler terminal 11A, and the winding end wire is connected to the flat connecting plate 12. Coupler terminal 1
1A is formed in an L shape, and a base portion of a horizontal portion 11B thereof is integrally molded and attached to a lower collar portion 9C, and a vertical portion is formed from a side end of the horizontal portion protruding laterally from an outer periphery of the lower collar portion 9C. 11C
Is bent upward. On the other hand, connection plate 1
2 is formed in a flat plate annular shape, and is arranged in the inner portion of the lower collar portion 9C so as to face the other end of the lower collar portion 9C.

The outer peripheries of the coil bobbin 9, the coil 10 and the coupler terminal 11A are outmolded with a synthetic resin material. This out-molded state is shown in FIG. At this time, the vertical portion 1 of the coupler terminal 11A
On the outer periphery of 1C, a coupler housing 13 with an open top
And a connecting portion 13A for connecting the coupler housing 13 and the out-molded portion of the lower collar portion 9C of the coil bobbin 9 is formed on the outer periphery of the horizontal portion 11B. A coupler 14 is formed by the coupler housing 13, the connecting portion 13A, and the coupler terminal 11A. The one in which the coupler 14 is directly formed on the coil bobbin 9 is called a direct coupler system. A power supply side coupler (not shown) is connected to the coupler 14.

The solenoid valve device is assembled as follows. A fixed core 4 is attached to the bottom portion 1A of the housing 1 so as to face the inside of the housing 1, a packless pipe 5 is attached to the outer periphery of the fixed core 4, and a movable body including a valve body 8 is provided in the packless pipe 5. The core 6 is the other side 4 of the fixed core 4.
The other side surface 4A of the fixed core 4 is disposed so as to face A.
A spring 7 is contracted between the movable core 6 and the movable core 6. On the other hand, from the open end 1D of the housing 1 toward the bottom 1A,
A coil bobbin 9 including a coupler 14 and a coil 10 is inserted and arranged, and then the end plate 2 and the valve body 3 are provided from the open end 1D of the housing 1 to the outer periphery of the packless pipe 5.
Is inserted and arranged.

In such a state, the end plate 2 is arranged on the locking step portion 1C of the housing 1, and the facing connection surface 3E of the mounting flange portion 3A of the valve body 3 faces the facing connection surface 2C of the end plate 2. Placed close to each other,
On the other hand, the upper surface of the end plate 2 and the bottom portion 1A of the housing 1
A coil bobbin 9 having a coupler 14 and a coil 10 is inserted and arranged in the housing 1 between and between the fixed core 4 and the packless pipe 5. In the above arrangement state, the housing 1 includes the coil bobbin 9 including the coil 10, the end plate 2, and the mounting flange portion 3 of the valve body 3.
Around the outer periphery of A and the open end 1D of the housing 1
Extends slightly below the mounting flange portion 3A, and the open ends 1D are swaged inwardly on the mounting flange portion 3A to fix the above-mentioned components to each other to form an electromagnetic valve device.

When the above-mentioned assembly is performed, the coupler 1
4, the coil bobbin 9 provided with the coil 10 is inserted and arranged from the opening end 1D of the housing 1 toward the bottom portion 1A. Therefore, on the outer periphery of the housing 1, from the opening end 1D of the housing 1 upward, A coupler groove 1E into which the connection portion 13A of 14 can be inserted is formed. This coupler groove 1
E is best shown in FIG. Reference numeral 15 is an earth spring that is provided on the outer periphery of the packless pipe 5 and is contracted between the connection plate 12 and the upper surface of the end plate 2. Further, R in the drawing is an O-ring made of a rubber material, which is arranged between the respective facing surfaces and keeps the airtightness of that portion.

[0008]

According to such a conventional solenoid valve device, corrosion occurs on the connection surface between the opposed connection surface 2C of the end plate 2 and the opposed connection surface 3E of the mounting flange portion 3A of the valve body 3. This is because the valve body 3 is made of an aluminum material, the end plate 2 is made of an iron-based material, and since the aluminum material has a higher ionization tendency than the iron-based material, it directly contacts the iron-based material. This is because the aluminum material becomes ions and decomposes to cause corrosion. Therefore, the joint portion of the end plate 2 formed of the iron-based material of the mounting flange portion 3A of the valve body 3 formed of an aluminum material, that is, the opposed connection surface of the valve body 3 connected to the opposed connection surface 2C of the end plate 2. Corrosion occurs on the 3E side.

In particular, in the case of a so-called direct coupler system in which the coupler 14 formed integrally with the coil bobbin 9 directly projects to the outside of the housing 1, the coupler 14 is inserted into the housing 1. The notched coupler groove 1E is formed, and this coupler groove 1E is formed.
From this, moisture invades between the opposing connecting surface 2C of the end plate 2 and the opposing connecting surface 3E of the mounting flange portion 3A of the valve body 3. When water enters between the facing connection surfaces 2C and 3E, the corrosion proceeds at an accelerated rate.

As described above, when the opposing connecting surface 3E of the mounting flange portion 3A of the valve body 3 is corroded, the bottom surface of the O-ring groove 3F recessed in the mounting flange portion 3A,
The side surface of the groove tends to corrode, and the groove depth and groove width tend to increase, which reduces the tightening margin of the O-ring R contracted in the O-ring groove 3F, resulting in good sealing performance. Will not be retained.

The solenoid valve device according to the present invention has been made in view of the above problems, and it suppresses the occurrence of corrosion on the opposing connection surface of the mounting flange portion of the valve body, and has an excellent sealing property for a long period of time. It is intended to provide a valve device having

[0012]

In order to achieve the above-mentioned object, a solenoid valve device according to the present invention is made of a magnetic material and has a bottomed cylindrical housing having a bottom portion at one end and an opening at the other end. The end plate made of an iron-based material and the mounting flange of the valve body made of an aluminum material are placed in contact with each other at the open end of the coil, and the coil is wound around the inside of the coil bobbin that is placed in the housing. , A fixed core fixed to the bottom of the housing, and a movable core movably arranged facing the fixed core are arranged in synchronization with the movable core toward the valve seat arranged in the valve body. In a solenoid valve device provided with a valve body that moves to a position, a flat carbon gasket is disposed between the end plates and the opposing connection surfaces of the mounting flange of the valve body.

[0013]

[Function] Since a carbon gasket is arranged between the opposing connecting surface of the valve body and the opposing connecting surface of the end plate and they do not come into direct contact with each other, corrosion occurs on the opposing connecting surface of the valve body. There is nothing to do. Further, since the carbon gasket is arranged in a compressed state between the opposing connecting surface of the valve body and the opposing connecting surface of the end plate, a sealing effect is exerted on this connecting surface portion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the solenoid valve device according to the present invention will be described below with reference to FIG. The same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. The opposing connection surface 3E of the mounting flange portion 3A of the valve body 3 and the end plate 2
The thin plate-shaped carbon gasket 20 is disposed between the opposite connection surfaces 2C and 2C, and the opposite connection surfaces 3E and 2C are provided.
Sandwiched between. The carbon gasket 20 has a thin plate shape of, for example, about 0.5 mm and 1.0 mm, and has a hole 2 through which the packless pipe 2A is inserted at the center thereof.
0A is drilled. Therefore, the opposing connection surface 3E of the mounting flange portion 3A of the valve body 3 made of an aluminum material,
Since there is no direct contact with the facing connection surface 2C of the end plate 2, corrosion of the facing connection surface 3E of the valve body 3 made of an aluminum material having a large ionization tendency can be completely suppressed. Further, even if water enters between the opposing connecting surfaces 2C and 3E through the coupler groove 1E of the housing 1, the opposing gaskets 2C and 3E are blocked by the carbon gasket 20, so that the valve body 3 is corroded. There is no such thing. On the other hand, the carbon gasket 20 has two opposing connecting surfaces 2C and 3C.
It is sandwiched between E in a compressed state.

According to the above, corrosion does not particularly occur on the opposing connection surface 3E of the mounting flange portion 3A of the valve body 3,
And the carbon gasket 20 are connected to both facing connection surfaces 2C and 3E.
By being compressed and sandwiched between them, the sealability at the connection surface between the opposed connection surface 3E of the valve body 3 and the opposed connection surface 2C of the end plate 2 can be favorably maintained for a long period of time.

The coil 10 is grounded to the outside through the connecting plate 12, the earth spring 15, the end plate 2 and the valve body 3, and the resistance value of the carbon gasket is 0. In the range of 5 mm to 1.0 mm, it is 0.025 Ω to 0.183 Ω and has good conductivity, so it does not become a factor to hinder the earth.

Further, since the O-ring groove 3F and the O-ring R provided in the conventional valve body can be eliminated, the die manufacturing cost of the valve body 3 and the O-ring groove 3F of the O-ring R are reduced. This eliminates the need for mounting work and enhances the economic effect.

Incidentally, the coupler groove 1E is eliminated by replacing the direct coupler system with the lead wire system, while the opening end 1D of the housing 1 is caulked to the end plate 2, and the valve body 3 is opposed. The connection portion between the connection surface 3E and the opposing connection surface 3E of the end plate 2 is directly exposed to the outside, and moisture enters this connection portion,
Even in such a case, the carbon gasket 20 can exert the same action and effect as above.

[0019]

As described above, according to the electromagnetic valve device of the present invention, the flat plate-shaped carbon gasket is arranged between the facing connection surfaces of the end plate made of an iron material and the mounting flange of the valve body made of an aluminum material. Can prevent corrosion on the connection surface between the end plate and the valve body,
A good sealability can be obtained over a long period of time, and the workability of assembly can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a solenoid valve device of the present invention.

FIG. 2 is a vertical cross-sectional view showing a conventional solenoid valve device.

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a vertical cross-sectional view showing a state in which a coil bobbin including a coil and a coupler terminal is out-molded.

[Explanation of symbols]

 1 Housing 1D Open End 2 End Plate 2C Opposing Connection Surface 3 Valve Body 3A Mounting Flange 3E Opposing Connection Surface 4 Fixed Core 6 Movable Core 20 Carbon Gasket

Claims (1)

[Claims] 1. An end plate 2 made of an iron-based material and an aluminum material at an opening end 1D of a housing 1 having a bottom 1C having a bottom 1A at one end and an opening at the other end and made of a magnetic material. 3A mounting flange of valve body 3
Are arranged so as to face each other, the coil 10 is wound around the coil bobbin 9 disposed inside the housing 1, and the fixed core 4 fixed to the bottom portion 1A of the housing 1 and the fixed core 4 face each other. And the movable core 6 that is movably disposed, and the valve seat 3 that is disposed in the valve body 3
In the solenoid valve device including the valve body 8 that moves in synchronization with the movable core 6 toward D, a flat plate-shaped carbon gasket 20 is provided between the facing connection surfaces 2C and 3E of the mounting flange 3A of the end plate 2 and the valve body 3. An electromagnetic valve device characterized in that