WO1990001651A1

WO1990001651A1 - Solenoid valve

Info

Publication number: WO1990001651A1
Application number: PCT/JP1988/000809
Authority: WO
Inventors: Shozo Miyazawa; Eiji Kobayashi
Original assignee: Kabushiki Kaisha Kambayashi Seisakusho
Priority date: 1988-08-15
Filing date: 1988-08-15
Publication date: 1990-02-22

Abstract

This invention relates to a solenoid valve. In order to keep a valve seat in a conventional solenoid valve open or closed, it is necessary to continuously supply an electric current to an electromagnetic coil, and this causes the power consumption to increase greatly. In order to solve this problem, the solenoid valve according to the present invention consists of an electromagnetic coil; an armature which is composed of a permanent magnet capable of being moved in a central bore in an electromagnetic coil in the axial direction thereof, and which is provided at the valve seat-side end portion of a flow passage with a valve body for use in substantially opening and closing the valve seat; a fixed magnetic pole which is disposed in a position in which the electromagnetic coil is energized to attract the armature, and which is formed out of a magnetic material so that the armature can be attracted to the magnetic coil by its own magnetic force even when the supplying of an electric current to the electromagnetic coil is stopped; and a means for constantly urging the armature toward the valve seat. This solenoid valve can be used as a means for controlling a flow rate of a fluid by interrupting or allowing a flow of a fluid.

Description

Specification

Name of the invention

solenoid valve

Technical field

The present invention relates to a solenoid valve, and more particularly to a self-holding solenoid valve using a permanent magnet.

Background technology

Conventionally, an electromagnetic valve is an armature movably provided in the direction of the axis of the electromagnetic coil and to the electric coil as power is supplied, and a valve attached to one end of the armature. There is known a valve having a valve body, which opens and closes a valve seat directly or via a diaphragm or the like as the valve moves in the axial direction of the electromagnetic coil.

However, the conventional solenoid valve described above has the following problems.

When you stop the energization of the electromagnetic co-I-le § over Machi §: or electric arc away from the I几and _u follow has become Yo return to the previous position:. Te power Ζ - 'Roh to stop the power supply to the Le Then, the valve body once opens or closes the valve seat that has been closed or closed again. If it is desired to maintain the open or closed state once the power is supplied to the coil, the power supply to the electromagnetic coil must be continued, which consumes a large amount of electricity. There is a problem that it becomes worse.

Disclosure of the invention

Therefore, according to the present invention, even if the power supply to the electromagnetic coil is stopped once, the state at the time of power supply can be maintained by itself and the power consumption is low.

For the purpose of providing a valve, it has the following configuration:

That is, the coil b is formed by a permanent magnet which is movable in the axial direction of the coil in the Φ core hole of the coil. An armature provided with a valve element for substantially opening and closing the valve seat is provided at a portion on the valve seat side in the flow path, and at a position where the electromagnetic coil is energized and sucks the valve mass. And a fixed magnetic pole formed of a magnetic material so that the armature can be attracted by its own magnetic force even when the energization of the electromagnetic coil is stopped, and the armature is always attached to the valve seat direction. And a biasing means for performing the operation.

By providing the above configuration, the solenoid valve according to the present invention can maintain its state even when power supply to the electromagnetic coil is stopped, because the solenoid valve is a permanent magnet. When performing the operation, go to the O electromagnetic coil -i; i Γ. Therefore, a radial solenoid valve with low power consumption can be provided.

Brief explanation of drawings

FIG. 1 is a front sectional view showing a first embodiment of the solenoid valve according to the present invention,

Fig. 2 is an explanatory diagram showing the relationship between the polarity of the electromagnetic coil and the polarity of the permanent magnet.

Sectional view showing the disassembled state of the solenoid valve shown in Figs. FIG. 4 is a front sectional view showing the second embodiment.

Example

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

: I-th embodiment:!

The first embodiment will be described with reference to FIG.

First, the configuration is explained

In the figure, reference numeral 10 denotes an i-coil, which is formed by winding an electric wire around a coil bobbin 12: i ± The part is gas-liquid-tightly partitioned by a partition 16.

Reference numeral 18 denotes a casing, which is formed of a non-magnetic material and contains the above-mentioned electromagnetic coil 10 and the like.

Reference numeral 20 denotes a fixed magnetic pole, which is fixed by caulking to a through hole 22 formed in the top of the casing 18 and above the partition wall 16 of the electromagnetic coil 10 center hole 14. Is arranged

The armature 24 has a permanent magnet 26 and a valve body 28 which are formed so as to be united by a nonmagnetic material cap 30. Center hole I 1 O gap of coil 10.

1 [; can be moved in the axial direction at the lower part, and the valve stem 28 can open and close the diaphragm 丄 and 扳 C. I'm sorry.

Reference numeral 32 denotes a diaphragm, the outer periphery of which is fixed to the inner surface of a casing force "18. The diaphragm 32 has a pipe π; a valve seat 35. Diaphragm 3 1 fits in the center.-Wear-'-,-'. Note that a small 7ί I · is drilled in the diaphragm 32 and the diaphragm plate 34. The back pressure chamber 38 is formed inside the valve main body by the diaphragm 32, and in the upper side. Therefore, the armature 24 moves within the back pressure 38 in the axial direction of the electromagnetic coil 10.

Reference numeral 4-0 denotes a spring, which is a biasing means, which is externally fitted to the valve body 28, and whose outer periphery on the upper surface is in contact with the coil bobbin 12 so that the armature is provided.

2 is constantly biased downward.

Name: Case i S, Electromagnetic coil 10-. Upper magnet H 2 (;, Panel 40, Diaphragm 32 and Diaphragm plate 34) : Form 4 2 is formed.

Reference numeral 4 4 denotes a valve seat, which is formed integrally with the outer cylindrical portion 48 by connecting pieces 4 ί '放射放射 extending radially from the wall. Is composed. The upper end of the outer cylindrical portion 48 is fitted and fixed in the lower end of the casing 1C, and the valve unit 42 and the valve seat 2 are connected to each other. At this time, the outer periphery の of the diaphragm 32 is sandwiched together with the lower end of the coil bobbin 14.

Further, the outer periphery of the Ke one sheet ring 1 8 lower end _c valve seat 4 4 which prevents the dropping off from the cable shea ring 1 8 of this and the I Risototo 4 8 which is bent to the inside of the A rubber-made flat sheet 5 is externally fitted to the outer surface, and its outer peripheral edge can be brought into contact with the step 5 on the inner wall of the outer cylinder 48 when it is bent. . In addition, a flange 56 is externally fitted to the lower part of the fucose sheet 5 ′ to prevent intrusion of dust and the like from a gap between the valve seat 44 and the inner wall of the upper cylindrical portion 48. I have.

Numeral 58 denotes a flow unit, which is provided with an inflow channel 60 and an outflow channel 6. The upper surface of the flow passage unit 58 is open, and the valve unit 42 and the valve seat unit 50 are fitted in the inner concave portion 64. In order to ensure gas-liquid tightness at this time, a 0 ring (6 ·····) is interposed between the sliding surfaces of the valve seat unit 50 and the channel unit 58.

Also, the valve unit 42 is connected to the bolt Ί 0 via the

The valve unit is pressed and fixed to the flow channel unit 58 by '

42, the valve seat unit 50 and the flow unit 58 are formed integrally. Fig. 3 is a cross-sectional view showing the disassembled state of the valve unit 42, the valve seat unit 50 and the channel unit 58. Next, the operation together with Figs. 1 and 2 will be described. In the state shown in FIG. 1, the electromagnetic coil 10 is not energized, the arch 24 is pushed downward by the urging force of the plate panel 40, and the valve body 28 is driven by the die. When the pilot valve seat 35 of the diaphragm plate 34 is closed, In both cases, the diaphragm 32 is seated on the valve seat 44 and the valve seat 44 is closed. The fluid enters the inflow channel 60 in the direction of arrow A, and the dust is removed by the filter 56. Further, it passes through the gap between the flow sheet 52 and the inner wall of the outer cylinder portion 48 and enters the back pressure chamber 38 through the small hole 36, and the diaphragm 32 and the diaphragm plate 3 Back pressure is applied to 4. Here, the polarity of the permanent magnet 26 of the armature 24 is described as HJ] as shown in FIG. 2 with the upper end being the N pole and the lower end being the S pole (of course, the reverse is also possible).

Next, when a current is applied to the coil 10 so that the upper end is an S-pole and the lower end is an N-pole, the flow of the fluid into the outflow passage 62 should be as follows. (See Fig.)) · A fixed magnetic pole made of magnetic material becomes 20 urn, and the upper end becomes the N pole and the lower end becomes the S pole. Then, the fixed magnetic pole 20 and the permanent magnet 26 attract each other, the armature 24 approaches the fixed magnetic pole 20 against the urging force of the spring 40, and the permanent magnet 26 moves to the fixed magnetic pole 20. Adsorb. Here is the electromagnetic coil '108! Even if: is stopped, the permanent magnet 26 retains the state of being attracted to the fixed magnet ffi 20 by its own magnetic force.

At this time, the valve element 28 of the armature 24 opens the pie port valve seat 35 and releases the pressing of the diaphragm 32 and the diaphragm plate 34, so that the back pressure chamber 38 Fluid that has applied back pressure to the diaphragm 32 and the diaphragm plate 34 in the tank flows out of the open pipe valve seat 35 to the outflow passage 62 along with the fluid. Fram 3 2 also opens valve seat 4 4. Then, the fluid entering from the inflow channel 60 flows to the open valve seat 44 with low flow resistance, and the arrow

It flows out of outflow channel 6 2 in the direction of B. At this time, the permanent magnet 26 is attracted to the fixed magnetic pole 20 by its own magnetic force, so that fluid can flow even when the electromagnetic coil, '!] 0 is not energized. Here, in order to stop the outflow of the fluid to the outflow passage 62, a current in the opposite direction to that when the valve seat 44 is opened is supplied to the electromagnetic coil 10. Then, the upper end of the electromagnetic coil 10 becomes the N pole and the lower end becomes the S pole: Then, the fixed magnetic pole 20 becomes the S pole at the upper end and the N pole at the lower end. The fixed magnetic pole 20 and the permanent magnet 2 6 Repel each other. Then, the armature 24 closes the valve seat 35 by the urging force of the leaf spring 40 and presses the diaphragm 32 and the diaphragm plate 34, so that the diaphragm is pressed. 3 2 closes valve seat 4 4. Then, the fluid does not escape from the valve seat 4 to the outflow passage 62, enters the back pressure chamber 38 from the small hole 36, and applies a back pressure to the diaphragm 32 and the diaphragm plate 34. Close the clamp and valve seat 4 4. Here, even if the power supply to the electromagnetic coil 10 is stopped, the armature 24 can maintain the same state by the urging force of the spring 40.

In this embodiment, a filter 56 and a flow sheet 52 are provided between the inflow passage 6Q and the valve seat 44. Can prevent O flowing into the outflow passage G 2. When the inflow pressure of the fluid becomes too high, the outer edge portion of the flow sheet 52, which is caused by S, bends and approaches the step portion 5. As a result, the pressure (flow rate) of the fluid in the outflow passage t: 2 can be maintained at a substantially constant value or less, and the unit combining the valve unit 42 and the valve seat unit 50 is also provided. Since the unit 72 and the channel unit 58 can be combined, if the unit 72 has high accuracy, the accuracy of the channel unit 58 may be low, so the manufacturing cost The second embodiment allows the solenoid valve to be compatible with the valve.

A second embodiment will be described with reference to FIG.

This embodiment places the valve seat 100 directly below the armature 1G2. This is a direct-acting solenoid valve that opens and closes with the provided valve element 104. In this embodiment, the valve spring 104 is constantly urged in the direction of the valve seat 100 by using the coil spring 106 as the urging means.

Fluid flows in the direction of arrow C in the inflow passage 108, but in the state shown in FIG. 4, the fluid flow is stopped because the valve body 104 closes the valve seat 100.

In this case, as in the first embodiment, the electromagnetic coil 110 is energized to magnetize the fixed pole 112, and the permanent magnet 111 of the armature 112 coil winding〗 106 is turned on. When suction is applied against the biasing force, the valve .3: 10 is opened, and the fluid flows through the outflow channel 1 16 in the direction of arrow D ©. To stop the outflow of the fluid, the electromagnetic coil 1 1 1 Reverse to 0 ί¾ ':: Current flows and repulses fixed pole 1 1 2 and permanent magnet 1 1 4. The armature 102 is then pushed in the direction of the valve seat 100 by the biasing force of the coil spring 106, and the valve rest 1004 closes the valve seat 100 to allow fluid to flow. Stop the flow.

Also in this embodiment, the valve socket 120 having the casing 11 S and the electric power π i: (: armature 102, coil sprinkle “1ϋe”), and the valve seat 1 A unit which combines a valve seat unit 124 comprising an outer cylinder portion 122 integrally formed with the valve seat 100 and the valve seat 100 is connected to a flow passage unit 126. One solenoid valve is formed by fitting into the solenoid valve.

However, the solenoid valve according to the present invention does not necessarily need to be able to be divided into a valve unit, a valve seat unit and a channel unit as in the above-described embodiment.

Further, the valve body may close the valve seat when the armature is attracted to the fixed magnetic pole.- In the first and second embodiments, the permanent magnet is a magnet. Although the armature is provided in the chair, the armature may be formed of a magnetic body and a valve body, and the permanent magnet may be provided in the center hole of the electromagnetic coil. In this case, if the armature is energized by the electromagnetic coil and is attracted against the urging force of the urging means, the magnetic material is attracted to the permanent ill stone even if the energization of the electromagnetic coil is stopped. The state where the armature is adsorbed is maintained. When releasing the armature, a current in the opposite direction is applied to the electromagnetic coil to generate a magnetic field in the electromagnetic coil that attenuates the magnetic force of the permanent magnet, and the armature is biased by the urging force of the urging means. May be released.

As described above, various preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and many modifications can be made without departing from the spirit of the invention. Of course.

Claims

The scope of the claims

An electromagnetic coil,

A permanent magnet movably arranged in the axial direction of the electromagnetic coil in a center hole of the electromagnetic coil, and a permanent magnet integrated with the permanent magnet to open and close a valve seat provided in a flow passage. An armature having a valve body of

Biasing means for constantly biasing the armature toward the valve seat;

When the electromagnetic coil is energized so as to suck the armature, it is arranged at a position where the armature is adsorbed. Once the armature is adsorbed, even if the energization to the electromagnetic coil is stopped, the attachment is stopped. And a fixed magnetic pole made of a magnetic material so as to be attracted by the magnetic force of the permanent magnet of the armature against the urging force of the urging means.

An electromagnetic coil,

A magnetic body disposed in the center hole of the electromagnetic coil so as to be movable in the axial direction of the electromagnetic coil, and is integrally assembled with the magnetic body, and opens and closes a valve seat provided in a flow passage. An armature having a valve body for performing

Biasing means for constantly biasing the armature toward the valve seat;

When the electromagnetic coil is energized so as to suck the armature, it is arranged at a position where the armature is sucked, and once the armature is adsorbed, even if the energization to the electromagnetic coil is stopped, the magnetic force is maintained by its own magnetic force. The armature can be attracted against the urging force of the urging means, and when the electromagnetic coil is energized to release the armature, the magnetic force is attenuated by the magnetic force of the electromagnetic coil. An electromagnetic valve, comprising: a permanent magnet for releasing attraction of a mature person.

An electromagnetic coil,

A back pressure chamber is separated inside the valve body, and a small hole communicating with the inlet side of the valve seat provided in the flow passage is formed, and the back pressure chamber and the outlet side of the valve seat are provided. A diaphragm plate having a valve port seat attached thereto, and a diaphragm for opening and closing the valve seat;

A permanent magnet movably arranged in the axial direction of the electromagnetic coil in the center hole of the electromagnetic coil, and a valve body integrally assembled with the permanent magnet to open and close the pilot valve seat; A mature woman having:

Biasing means for constantly biasing the armature toward the pilot valve seat;

When the electromagnetic coil is energized so as to suck the armature, it is arranged at a position where the armature is adsorbed. Once the armature is adsorbed, even if the energization to the electromagnetic coil is stopped. A solenoid valve comprising: a fixed magnetic pole formed of a magnetic material so as to be attracted by the magnetic force of the permanent magnet of the armature against the urging force of the urging means.

An electromagnetic coil,

A back pressure chamber is separated inside the valve body, and a small hole communicating with the inlet side of the valve seat provided in the flow passage is formed, and the back pressure chamber and the outlet side of the valve seat are provided. A diaphragm plate having a valve seat is attached, and a diaphragm for opening and closing the valve seat is provided;

Move in the axial direction of the electromagnetic coil in the center hole of the electromagnetic coil An armature having a magnetic body arranged so as to be capable of being provided, and a valve body integrally assembled with the magnetic body and for opening and closing the pad mouth.

Urging means for constantly urging the armature toward the pilot valve seat;

When the electromagnetic coil is energized so as to suck the armature, it is arranged at a position where the armature is adsorbed. Once the armature is adsorbed, even if the energization to the electromagnetic coil is stopped. The armature can be attracted by its own magnetic force against the urging force of the urging means, and when the electromagnetic coil is energized to release the armature, the magnetic force is attenuated by the magnetic force of the electromagnetic coil. An electromagnetic valve, comprising: a permanent magnet for releasing the attraction of the armature.

The valve unit having the electromagnetic coil, armature, fixed magnetic pole, and urging means, and the valve seat having the valve seat are integrally assembled. A solenoid valve according to paragraph 1, 2-3 or 4.

The nit obtained by integrally assembling the valve unit and the valve seat unit may be integrally assembled with a channel having an inflow path and an outflow path. A solenoid valve according to paragraph 1, paragraph 2, paragraph 3, paragraph 4, or paragraph 5.

A flexible flow sheet is provided on the inflow side of the valve seat. Claims 1, 2, 3, 4, and 5 characterized in that: Is the solenoid valve described in paragraph 6.