JP2561478Y2 - Electric 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 motor-operated valve comprising a directional control valve and a solenoid mounted on the directional control valve for switching a valve element.

[0002]

2. Description of the Related Art In general, there is known a motor-operated valve comprising a direction switching valve portion and a solenoid mounted on the direction switching valve portion and switching a valve element of the direction switching valve portion. The valve is constituted by a combination of a direction switching valve portion and a solenoid portion which are independent single parts, and an armature (output portion) of the solenoid portion and a valve body of the direction switching valve portion are connected via a joint or a fitting shape or the like. Had joined. On the other hand, the solenoid part is a rotary solenoid
And the tip of the rotor of the rotary solenoid
It is located inside the directional control valve and at the tip of the rotor.
An electric valve integrally formed with a valve body is also disclosed in Japanese Patent Application Laid-Open No. 59-1801.
No. 79, for example.

[0003] However, such a conventional electric valve,
The valve body is formed integrally with the rotor of the rotary solenoid.
Use of the rotor due to long-term use and use of O-rings
From the directional control valve due to the pain of the O-ring etc.
Water leakage occurs and travels down the rotor to invade the rotary solenoid.
There is a risk of entering. In particular, the rotary solenoid is an electrical part
If water leaks in,
There is a possibility that a serious problem such as a problem may occur.

[0004] The present invention solves such problems existing in the prior art, and discloses a rotary solenoid.
The directional control valve is integrally formed with the
Also reliably prevents water leakage into the rotary solenoid
It is another object of the present invention to provide a highly reliable electric valve that protects a rotary solenoid from water leakage .

[0005]

SUMMARY OF THE INVENTION The present invention relates to a directional control valve unit 2.
And the valve body 2v
In constructing the electric valve 1 comprising a solenoid <br/> id portion 3 using the rotary solenoid 3r for switching manipulate, especially
In addition, the tip 4s of the rotor 4 in the rotary solenoid 3r is disposed inside the direction switching valve 2, and the valve body 2v is integrally formed with the tip 4s of the rotor 4;
Inside the rotor 4 between the section 2 and the rotary solenoid 3r
Form a space around the space and communicate the space to the outside
It is characterized in that an upper drain port 20 is provided .

[0006]

According to the electric valve 1 of the present invention, first, the energization control of the rotary solenoid 3r is performed, whereby the rotor 4 is rotated and displaced over a predetermined angle (60 °). Since the valve element 2v is formed integrally with the tip portion 4s of the rotor 4, the valve element 2v integral with the rotor 4 is also rotationally displaced by the rotational displacement of the rotor 4. That is, the valve 2v is switched by the rotary solenoid 3r, whereby the direction of the direction switching valve portion 2 is switched. On the other hand, long term
Due to wear of the rotor or O-ring pain
Water leaks from the directional control valve 2, and the water leaks through the rotor 4.
Is discharged to the outside through the upper drain port 20 and water leakage
Does not enter the solenoid 3r.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will now be described in detail with reference to the drawings.

First, the structure of the electric valve 1 according to the present invention will be described with reference to FIGS.

The electric valve 1 is roughly divided into a three-port directional switching valve portion 2 and a solenoid portion 3 using a rotary solenoid 3r. As shown in FIG. 5, the rotary solenoid 3r includes a casing 11 having a flange 11f, the directional switching valve unit 2 includes a switching block 12 having a flange 12f, and the flanges 11f and 12f are fixed by screws 13. Both are assembled together.

The direction switching valve section 2 has a function of switching the supply direction of water (generally, fluid), for example, and has a water inlet 14i on one side of the switching block 12 and a first outlet on the other side. The water outlet 14p and the second water outlet 14q face respectively. In addition, a valve housing hole 15 having a circular cross section penetrating in the vertical direction is formed inside the switching block 12, and the water inlet 14i, the first water outlet 14p, and the second water outlet 14q are respectively connected to the water channel 1
It communicates with the valve housing hole 15 via 6i, 16p and 16q.

On the other hand, reference numeral 4 denotes a rotor, which is formed by a single rod member as shown in FIG. The upper half of the rotor 4 becomes the rotor body 4r, and the rotary solenoid 3
r and a lower end portion 4s serving as a lower half of the rotor 4 becomes a valve body 2v and is housed in the valve housing hole 15.
The valve body 2v is formed to have a circular cross section, and the outer diameter is selected to be smaller than the inner diameter of the valve housing hole 15, and a cylindrical liner 17 that fills the gap between the valve body 2v and the valve housing hole 15 is interposed. . The liners 17 include the water channels 16i, 16p and 1
6q has water passage holes 18i, 18p and 18q communicating therewith, and has a Y-shaped switching water passage 19 inside the valve body 2v.

Also , above the liner 17 , ie, direction switching
Rotor 4 between valve portion 2 and rotary solenoid 3r
A space is formed around the middle part, and the space is
A communicating upper drain port 20 is provided and the liner 1
7, a space is formed at the tip of the valve body 2v,
And a lower drain port 21 that connects the space to the outside . Further, the lower end of the valve housing hole 15 is closed by the cap 22.

On the other hand, the rotor body 4r of the rotor 4 penetrates through the inside of the casing 11 of the rotary solenoid 3r, and the upper end protruding above the casing 11 serves as a manual operation section 4c. In this case, the rotor 4 is rotatably supported by bearings 23u and 23d provided above and below the casing 11. Further, a part of the rotor body 4r located inside the casing 11 is formed to have a small diameter, and a cylindrical magnet 24 is fitted into and fixed to this part. The magnet 24 alternately magnetizes N poles and S poles in the circumferential direction, and arranges a total of four poles at equal intervals.

Further, six magnetic poles 25... Facing the magnet 24 are provided. The magnetic poles 25 have, on the inner peripheral surface of a cylindrical yoke portion 25y, six core portions 25i projecting in the center direction and integrally formed at equal intervals in the circumferential direction, and each core portion 25i has a coil portion 25c. ... is wound. At this time, the yoke portion 25y is
Become a part of.

In addition, in the figure, 26 is an oil seal, 27
.. Are O-rings and 28 are ring grooves for accommodating the O-rings. The ring grooves 28 may be used as water reservoirs, and in this case, the O-rings 27 are unnecessary.

Next, the function of the electric valve 1 will be described with reference to the drawings.

First, the rotary solenoid 3r controls the energization of the coil portions 25c.
Can be rotationally displaced within an angle range of 60 °.

The rotation of the rotor 4 also causes the valve body 2v to rotate integrally, and is switched to the position indicated by the imaginary line in FIG. 2, so that the water inlet 14i is connected to the water passage 16i, the water passage hole 18i, the switching water passage 19, and the water passage hole 18p. The water flowing into the water inlet 14i communicates with the first water outlet 14p via the water passage 16p, and is discharged from the first water outlet 14p.

On the other hand, if the rotor 4 is displaced by 60 ° from this position and is switched to the position shown by the phantom line in FIG. 2, the water inlet 14i becomes the water channel 16i, the water channel hole 18i, the switching water channel 19, and the water channel hole 18q. The water flowing into the water inlet 14i communicates with the second water outlet 14q via the water passage 16q, and is discharged from the second water outlet 14q.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment.
For example, the direction switching valve section can be applied to an arbitrary direction switching valve section such as a 2-port or 4-port direction switching valve section. The rotary solenoid may be of another principle type, for example, a type in which the rotation angle range of the rotor is regulated by a stopper or the like. In addition, details, configurations, shapes, materials, quantities, and the like can be arbitrarily changed without departing from the gist of the present invention.

[0021]

As described above, in the electric valve according to the present invention, the tip of the rotor in the rotary solenoid is disposed inside the directional control valve, and the valve body is integrally formed at the tip of the rotor.
Between the directional control valve and the rotary solenoid.
A space around the middle part of the rotor in
Since the upper drain port that connects the space to the outside is provided ,
The basic effect that the structure can be simplified and the cost can be reduced, and there is no reduction in accuracy or abnormal noise due to use.
In addition to the above, the leakage of water into the rotary solenoid
This has a remarkable effect of providing a highly reliable electric valve that stops the rotary solenoid and protects the rotary solenoid from water leakage .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a motor-operated valve according to the present invention (C in FIG. 2).
-C line section),

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a front view of a rotor in the electric valve,

FIG. 5 is an external front view of the electric valve,

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electric valve 2 Direction switching valve part 2v Valve body 3 Solenoid part 3r Rotary solenoid 4 Rotor 4s Tip part 20 Upper drain port

Claims (1)

(57) [Scope of request for utility model registration] 1. A directional switching valve section (2) and a solenoid section using a rotary solenoid (3r) mounted on the directional switching valve section (2) to switch a valve element (2v).
The electric valve (1) consisting of (3), the tip portion of the rotor (4) in the rotor <br/> Li solenoid (3r)
Arranged (4s) inside the directional control valve (2), and before
The serial rotor (4) with integrally formed distal end portion of the valve body (4s) (2v) of said directional control valve unit (2)
Rotor (4) between rotary solenoids (3r)
Form a space around the middle part and connect the space to the outside.
An electric valve characterized by having an upper drain port (20) through which it passes .