JPH05280659A - Automatic valve controlled by permanent magnet actuator - Google Patents

Abstract

PURPOSE: To prevent wrong actuation of a diaphragm type automatic valve with a pilot valve in a power failure time by providing a permanent magnetic actuator for operating and controlling a pilot valve, through making a permanent magnet connected to the pilot valve through driving the actuator attract and sepal. CONSTITUTION: An N-pole of a magnet 342 is positioned on an N-pole of a magnet 351, by moving a control magnet holder 331 of a permanent magnet type actuator 30 to the left through rotating a motor 32. Accordingly, a repulsive force is generated between the magnet 342 and the magnet 351. A pilot valve controller 35 is pushed down, so that a pilot valve 352 is pressed against a valve seat 725 to close the valve. Then, the backpressure of a main valve 7 rises to close the main valve 7. When the S-pole of the magnet 342 is positioned on the N-pole of the magnet 351 by moving the control magnet holder 331 to the right, an attracting force is generated to open the pilot valve 352 and further to open the main valve 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening / closing valve, and more particularly to an automatic opening / closing valve which requires a small amount of electric power for control and is economical.

[0002]

2. Description of the Related Art Electromagnetic valves controlled by electromagnetic solenoids are widely used. However, there is a problem that these conventionally known valves require a considerable amount of electric power for control. Also, for large-diameter diaphragm valves, etc., the technique of controlling the opening and closing of the main valve using a pilot valve is widely adopted, but even in that case, the pilot valve is usually controlled by an electromagnetic solenoid, so the valve opening There is a problem that continuous energization is required either at the time of closing or at the time of closing, so that not only a considerable amount of power is consumed but also a malfunction occurs in the event of a power failure or the like.

[0003]

The object of the present invention is to control with a very small amount of electric power, and that electric power is required only when the valve is opened and closed, so that no malfunction occurs even in the case of a power failure. It is to provide a highly reliable automatic opening / closing valve.

[0004]

The above-mentioned problems can be solved in a diaphragm type automatic opening / closing valve with a pilot valve, by configuring the control of the pilot valve by a permanent magnet type actuator. This permanent magnet type actuator is driven by a small motor to rotate or reciprocate at least one permanent magnet type, and this permanent magnet attracts between the pilot valve and another permanent magnet. Force and repulsive force are generated to operate the pilot valve.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view showing a state of a conventionally known automatic opening / closing valve when opened, FIG. 2 is a sectional view showing a state when the valve is closed, and FIG. 3 is a valve opening state of a first embodiment of the present invention. 4 is a sectional view showing the state when the valve is closed, FIG. 5 is a three-dimensional exploded view showing the structure of the actuator shown in FIGS. 3 and 4, and FIG. 6 is the above-mentioned diagram. FIG. 7 is a top view showing a state in which the valve of the permanent magnet moving device for an actuator different from the above is opened, and FIG. 7 is a permanent magnet of the actuator in the state shown in FIG. 6 and a permanent magnet attached to the pilot valve. 8 is a perspective view showing a relative positional relationship with FIG. 8, FIG. 8 is a top view showing a state of the permanent magnet moving device shown in FIG. 6 when the valve is closed, and FIG. 9 is a permanent magnet of the actuator in the state shown in FIG. , Perspective view showing the relative positional relationship with the permanent magnet attached to the pilot valve FIG. 10 is a cross-sectional view showing a state when the valve is opened according to the second embodiment of the present invention, FIG. 11 is a cross-sectional view showing a state when the valve is closed, and FIG. 12 is the automatic opening / closing valve shown in FIGS. It is a three-dimensional exploded view which shows the structure of the permanent magnet type actuator used by.

1 and 2, 1 is a valve restraint, 2 is a valve body, 7 is a main valve, and 8 is an electromagnetic solenoid for controlling a pilot valve. The valve body 2 has an inlet 21, an outlet 22, and a main valve seat 221, and a main valve chamber 11 is formed between the valve body 2 and the valve retainer 1. The main valve 7 has a main valve seat 22.
1 and a backup disk 72. The peripheral edge of the diaphragm 71 is sandwiched between the valve body 2 and the valve retainer 1.

The backup disk 72 has a first protrusion 723 at the center thereof, which forms a control flow passage 724 which penetrates the diaphragm 71 and communicates with the flow passage from the main valve chamber 31 to the outlet 22 side. Main valve chamber 1 of the first protrusion 723
A pilot valve seat 725 is formed on the first side. Further, outside the contact surface of the main valve of the backup disk 72,
A second protrusion 72 that penetrates the diaphragm 71 and forms a leakage hole 722 that communicates with the main valve chamber 11 from the flow path on the inlet 21 side.
1 is provided.

The electromagnetic solenoid 8 includes a coil 81 wound around a bobbin 82 fitted outside a tubular portion 121 provided coaxially with the main valve 7 above the valve retainer 1, and a tubular portion 121.
A compression spring 85 and an iron core 83 having a pilot valve 84 at one end. While the current of the coil 85 is cut off, the iron core 83 is pushed out of the cylindrical portion 121 by the elasticity of the compression spring 85 and the pilot valve seat 725 is closed by the pilot valve 84, as shown in FIG. When the coil 81 is energized, the iron core 83 moves against the elastic force of the compression spring 85, as shown in FIG.
21 and the pilot valve will be opened.

When the pilot valve is closed as shown in FIG. 2, the pressure in the main valve chamber 11 becomes equal to the pressure on the side of the inflow port 21 and becomes high pressure, so that the main valve 7 has the main valve seat 221.
When the pilot valve is opened as shown in FIG. 1, the pressure in the main valve chamber 11 drops and becomes lower than the average pressure of the lower surface of the diaphragm 71. Is pushed up to the point where the pressures on both the top and bottom sides are balanced, and the main valve is opened.

In such a conventionally known solenoid type automatic on-off valve, since it is necessary to maintain energization while the main valve is open, much power is consumed, and the main valve should be kept open. If there is a power outage during the period, there is a problem that the main valve will close unintentionally. It is possible to make the main valve closed when energized by changing the configurations of the pilot valve and the electromagnetic solenoid 8, but such a change does not solve these problems.

Next, the embodiment shown in FIGS. 3 to 5 will be described. The valve body 2 and the main valve 7 are the same as the conventionally known ones shown in FIGS. In this embodiment, a permanent magnet valve actuator 30 shown here is used instead of the electromagnetic solenoid 8.

A pilot valve controller 35 has a magnet 351 at its upper end and a pilot valve 35 at its lower end.
Two are provided. The upper surface of this magnet 351 is assumed to be an N pole. The permanent magnet valve actuator 30 is
It comprises a motor 32 that can rotate in both forward and reverse directions, and a control magnet drive device 33 that is driven by the motor 32. The control magnet drive device 33 includes a drive shaft 333 and a magnet 3.
The control magnet holder 331 holds 41 and 342.

The drive shaft 333 has a male screw portion 3 at the center thereof.
34, mounted coaxially with the output shaft 321 of the motor 32, the control magnet holder 331 has an internal thread portion 332 that meshes with the external thread portion 334 of the drive shaft 333 on its inner surface, and a detent not shown. Even if the motor 32 is rotated by the action of the key, it does not rotate itself,
It reciprocates left and right in the figure along the drive shaft 333.

The control magnet holder 331 has magnets 341, 34 on its side surface facing the pilot valve controller 35.
Holds 2. In the state shown in FIG. 3, the control magnet holder 331 has reached the end point of its rightward movement, and since the S pole of the magnet 341 is directly above the magnet 351 (N pole), the attraction between both magnetic poles is therefore increased. The pilot valve controller 35 is pulled up by the force, and the pilot valve
2 is away from the pilot valve seat 725 and the pilot valve is open.

When the motor 32 rotates and the control magnet holder 331 reaches the end point of its leftward movement, the state shown in FIG. 4 is established, and the N pole of the magnet 342 is the magnet 351 (N pole).
, The pilot valve controller 35 is pushed downward by the repulsive force between the two magnetic poles.
2 is crimped to the pilot valve seat 725, and the pilot valve is closed.

Opening / closing of the main valve 7 in response to opening / closing of the pilot valve is the same as the above-described known automatic valve. That is, when the pilot valve is closed, the back pressure of the main valve 7 increases and the main valve 7 is closed. Conversely, when the pilot valve is opened, the back pressure of the main valve decreases and the main valve begins to open, and the pressure on both sides Therefore, the main valve 7 is opened to an opening degree at which is balanced. If the permanent magnet is a high-performance magnet such as a rare earth magnet, a magnetic force sufficient to surely control the opening / closing of the valve can be obtained.

6 to 9 show another example of the structure of the control magnet holder. Reference numerals 333 and 334 are a drive shaft connected to the output shaft of the motor 32 and a screw gear portion provided in the center thereof, and 36 is the screw gear portion 3 of the drive shaft.
It is a segment that meshes with 34. Segment 36
Holds the two magnets 362 and 372, and the shaft 361.
It is held so as to be able to reciprocate around and reciprocates between the position shown in FIG. 6 and the position shown in FIG. Reference numeral 38 is a guide hole for the guide pin 381.

In the state shown in FIG. 6, the magnets 351 and 371 are overlapped as shown in FIG. 7, and an attractive force acts between both magnets, so that the pilot valve is opened, and in the state shown in FIG. As shown in FIG. 9, the magnets 351 and 372 are overlapped, and the repulsive force acting between the magnets closes the pilot valve. The opening and closing of the main valve by opening and closing the pilot valve is the same as in the above-described embodiment.

Next, the embodiment shown in FIGS. 10 to 12 will be described. In this valve, the valve seat of the pilot valve is provided separately from the main valve, and a rotary type is used as the control magnet driving device. The valve 70 is composed of a diaphragm 73 and a backup disk 74, but is not provided with a control valve that communicates with the pilot valve seat and the flow passage on the outflow side. The main valve chamber defining the valve retainer 5 is divided into two valve chambers 52 and 53 by a partition member 83, and the valve chamber 52 is connected to the flow passage on the outlet side by a communication pipe 9.

The partition member 83 has a control channel 8 in the center thereof.
30 and the pilot valve seat 831 is provided at one end of the flow path 830. A holder 84 of the pilot valve 501 is attached to the partition member 83, and the holder 84 has leak holes 831 and 8 communicating with the control flow path 830.
32 is perforated. The pilot valve 501 is the rod 50
The magnet holder 503 holds the permanent magnet 504.

The valve retainer 5 has a communication pipe connection port 552, the valve body has the same 44, and the communication pipe 9 is connected to both connection ports. The control magnet driving device 60 includes a pinion 61 connected to the output shaft of the motor 32, a gear 62 meshing with the pinion 61, a rotating shaft 621 attached to the gear 62, and a control magnet holder 6 attached to the tip of the rotating shaft 621.
3. Control magnet 62 fixed to control magnet holder 623
It consists of 4 and. 623 is a guide hole 6 provided in the gear 62.
22 is a pin that is inserted into the gear 22, and the rotation angle of the gear 62 is 18
It is a stopper limited to 0 degree.

When the control magnet holder 63 is rotated by the rotation of the motor 32 and the control magnet 624 comes to a position facing the magnet 504 as shown in FIG. 11, a repulsive force acts between the two magnets and the pilot valve 501 moves to the valve seat. Since it is separated from 831, the pressure in the valve chamber 53 decreases and the main valve 70 is opened. Further, when the control magnet holder 63 is inverted and brought into a state as shown in FIG. 10, an attractive force acts between both magnets, or at least a repulsive force disappears, so that the pilot valve 501 causes the valve seat 8 to move.
In contact with 31, the pressure in the valve chamber 53 rises and the main valve 70 is closed.

[0023]

Since the present invention is constructed as described above,
According to the present invention, the valve can be controlled to open / close simply by operating the small motor for a short time when opening / closing the valve, and electric power is not required to maintain the open / closed state, thus providing an extremely economical automatic opening / closing valve. It is possible.

The constitution of the present invention is not limited to the above-mentioned embodiment, and in particular, the constitution of the main valve, pilot valve and magnet type actuator can be freely designed within the scope of the object of the present invention. The invention can be modified and includes all of them.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state when a conventionally known automatic opening / closing valve is opened.

FIG. 2 is a cross-sectional view showing a state of the automatic opening / closing valve shown in FIG. 1 when the valve is closed.

FIG. 3 is a cross-sectional view showing a state when the valve is opened according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state of the automatic opening / closing valve shown in FIG. 3 when the valve is closed.

5 is a three-dimensional exploded view showing the configuration of the actuator shown in FIGS. 3 and 4. FIG.

FIG. 6 is a top view showing a state in which the valve of the permanent magnet moving device for an actuator different from that shown in the above-mentioned figure is opened.

7 is a perspective view showing a relative positional relationship between the permanent magnet of the actuator and the permanent magnet attached to the pilot valve in the state shown in FIG.

8 is a top view showing a state of the permanent magnet moving device shown in FIG. 6 when the valve is closed.

9 is a perspective view showing a relative positional relationship between the permanent magnet of the actuator and the permanent magnet attached to the pilot valve in the state shown in FIG.

FIG. 10 is a cross-sectional view showing a state of the second embodiment of the present invention when the valve is open.

11 is a cross-sectional view showing a state of the automatic valve shown in FIG. 11 when the valve is closed.

12 is a three-dimensional exploded view showing a configuration of a permanent magnet type actuator used in the automatic opening / closing valve shown in FIGS. 10 and 11. FIG.

[Explanation of symbols]

 2, 4 ... ... Valve body 21, 41 ... Inflow port 22, 42 ... Outflow port 221,421 ... Main valve seat 3, 5 ... ··· Valve restraint 30, 60 ··· Permanent magnet type actuator 32 ··· · Motor 35 ··· · Pilot valve controller 352, 501 · ... Pilot valve 7,70 ... Main valve 71,74 ... Diaphragm 72,74 ... Backup disk 721 ... Second projection Part 723 ... First projection part 724, 9 ... Control flow path 725, 831 ... Pilot valve seat

Claims (3)

[Claims] 1. An automatic on-off valve comprising a pilot valve controlled by a permanent magnet actuator, comprising the following components. (A) Inflow port (21, 41), outflow port (22, 42)
And a valve body (2, provided with main valve seats (221, 421)
4). (B) The main valve seat (221, 42) is attached to the valve body (2, 4).
1) mounted so as to surround the main valve seat (221, 42)
Valve restraints (3, 5) forming a main valve chamber (11, 52, 53) with 1). (C) In order to open and close the main valve seat (221, 421),
The diaphragm (71, 74) whose outer peripheral edges are sandwiched by the valve body (2, 4) and the valve retainer (3, 5) and the main valve seat (221, 421) of the diaphragm (71, 74) are opposite to each other. A main valve (7, 70) consisting of a backup disk (72, 74) closely attached to the side. (D) From the flow path on the inlet (21, 41) side to the main valve chamber (3
Leaks (722,830) leading to 1,51). (E) From the main valve chamber (31, 51) to the outlet (22, 4)
Control channels (724, 9) that communicate with the channel on the 2) side.
(D) Pilot valve seats (725, 831) provided in the control flow paths (724, 9). (F) Pilot valve (3) that opens and closes the control flow paths (724, 9) by contacting and separating from the pilot valve seats (725, 831)
52, 501). (G) A magnet (34) driven by a motor (32)
1, 342, 64) to allow pilot valves (352, 5
01) The permanent magnet actuator (30, 60) that attracts and repels the magnet (351, 504) connected to the pilot valve (352, 501) to and from the pilot valve seat (725, 831). 2. A control flow path (724) in which a backup disk (72) penetrates the diaphragm (71) inside the valve contact surface and leads from the main valve chamber (31) to a flow path on the outlet (22) side. ) Is formed on the main valve chamber (11) side and a pilot valve seat (725) is provided on the first protrusion (723) and a diaphragm (71) outside the valve contact surface. The permanent magnet type actuator (30) has a pilot valve seat (30) having a second protrusion (721) forming a leak hole (722) communicating with the main valve chamber (11) from the flow path on the inlet (21) side. 725) and is provided coaxially,
A pilot valve (352) provided with a pilot valve (352) at the end on the pilot valve seat (725) side and a magnet (351) at the opposite end, a motor (32), The permanent magnets (341, 342) driven by the motor (32) through an appropriate speed reducer attract and repel the magnet (351) of the pilot valve controller (35) and reciprocate in the axial direction. Set the pilot valve (3
An automatic opening / closing valve having a pilot valve controlled by a permanent magnet type actuator according to claim 1, comprising a device for bringing 52) into and out of contact with a pilot valve seat (725). 3. A backup disk (74) has a protrusion (841) which penetrates the diaphragm (73) outside the contact surface of the valve and forms a leak hole which communicates with a flow path on the inlet (41) side. The partition wall (83) divides the valve chamber into a first valve chamber (53) adjacent to the main valve (70) and a second valve chamber (52) separated from the main valve (70). A pilot valve seat (831) and a pilot valve (501) that comes into contact with and separates from the pilot valve seat (831) are provided on the first valve chamber (53) side of (83), and the second valve chamber ( 52) is provided with a conduit (9) that connects the flow passage on the side of the outlet (42), the permanent magnet actuator (60) has a magnet (504) at one end, and is piloted by a rod (502). A pilot valve controller (() connected to the valve (501) 03), a motor (32), and a permanent magnet (64) driven by the motor (32) through an appropriate speed reducer to attract a magnet (504) provided in the pilot valve controller (503), Repulsive,
A device for reciprocating a pilot valve controller (503) in its axial direction to bring the pilot valve (501) into and out of contact with a pilot valve seat (831), and a permanent magnet type actuator according to claim 1. Automatic on-off valve controlled.