JPH08128553A - Fluid controlling valve - Google Patents

Abstract

PURPOSE: To tightly seal an inside of a valve casing perfectly so as to completely prevent controlling fluid from leaking to the outside by connecting a driving source arranged outside the valve casing and a valve unit serving as an operation unit inside the valve casing together by using magnetic force of a pair of magnets, which are opposedly arranged on the inside and on the outside of the valve casing, while enabling transmission of power. CONSTITUTION: In application to a rotary type four-way switching valve, for rotationally sliding a rotary valve 6 stored in an airtight cylindrical valve casing 1, rotational force of an electric motor 19 connected to the outside of the valve casing 1 is reduced by means of a speed reducing device 17 inside a speed reducing device chamber 18 connected to the outside, and the reduced number of revolutions and torque are transmitted to a primary side magnet 13 (permanent magnet). Then, the magnetic force is transmitted to an opposite side of a partition wall 3 in the valve casing 1, in other words, to a secondary side magnet 9 (permanent magnet) arranged inside the valve casing 1 so as to rotationally drive it in the same direction. Based on the rotation or the sliding drive of the secondary side magnet 9, adequate speed reduction is carried out by means of a speed reducing device 12, and then, transmission to the rotary valve 6 via a valve driving shaft 7 is carried out for rotating the rotary valve 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid control valve, and more particularly, to a driving force of an electric motor or the like arranged outside a valve box via a pair of magnets arranged with a valve box partition wall interposed therebetween. The present invention relates to a fluid control valve which is converted into a switching force of a valve in a valve box to drive the valve and has no fear of leaking control fluid to the outside.

[0002]

2. Description of the Related Art Valves are mainly installed in pipes to control fluids, and there are many types for a wide range of applications. The basics of valve design are fluid type, pressure,
Temperature, which is a basic condition, has become more sophisticated and diversified with technological innovations in the device industry.

The applications of valves are in all fields, and the main ones are roughly classified into those for plants, ships, water, construction equipment, etc. Since it is difficult to pick up the above, there are various types of valves for chemical plants and valves for air conditioners (for example, for controlling CFC gas or fluid). Also, as its type, a rotary valve (rotating valve,
For example, a rotary four-way switching valve etc.) and a slide valve (sliding valve, spool valve, etc.) can be mentioned.

FIG. 3 shows a recently proposed rotary type four-way switching valve for an air conditioner, for example, which is provided on a flat portion of a thick disk-shaped valve seat 35 which is a part of a valve case 40. The first to fourth piping holes (31, 32, 33, 34) are sequentially provided on a concentric circle at a predetermined pitch, and the valve seat 35 has an upper surface adjacent to one of the four piping holes (31, 32, 33, 34). A rotatably provided rotary valve 39 having at least one communication groove 36, 37 for connecting the two piping holes to each other, and rotating the rotary valve 39 to switch between heating and cooling (for example, Japanese Patent Laid-Open Publication No. HEI-6). −
221723).

A slide type four-way switching valve for an air conditioner is shown in FIG. 4. The structure is such that a cylindrical cylinder 60 has a first piping hole 61 in the center and a second lower portion in the center.
~ 4 pipe holes 62, 63, 64 is provided in a inverted cross-section valve seat 65 of three-dimensional cross-section, the bowl-shaped valve slide 66 is arranged on the upper surface of the valve seat 65, A piston rod 69 having piston rings 67 and 68 on both sides of the valve seat 65 is connected to the valve slide 66, and chambers 70 and 71 in a cylindrical cylinder 60 partitioned by the piston rings 67 and 68 are connected. , 72 the pressure of the refrigerant is the solenoid valve 74
By switching the piston rod 69
This is a system in which the air conditioner is switched by sliding the valve slide 66 through the air conditioner (see Japanese Patent Laid-Open No. 61-62677).

Further, Japanese Utility Model Laid-Open No. 4-68264, Japanese Patent Laid-Open No. 4-190058, Japanese Utility Model Laid-Open No. 58-127276.
Japanese Patent Laid-Open No. 59-155669 and Japanese Unexamined Patent Publication No. 59-155669 have been proposed, but the basic structure of the four-way switching valve body is almost the same as that shown in FIG.

Although each of the above-mentioned conventional examples has its own characteristic point, basically, the valve portion is directly operated by the combination of the electric motor and the speed reducer or the solenoid (electromagnet and iron core). A seal of high polymer rubber, etc., is required between and, and a permanent and complete seal cannot be achieved.

As another method, there is a method of incorporating an expensive closed motor or closed solenoid inside the valve, but it is very expensive.

However, it is very disliked and dangerous from the viewpoint of secondary pollution pollution and disaster prevention to leak control fluid such as toxic and harmful fluids and CFC fluids produced in chemical factories to the outside of the valve box. Therefore, it is necessary to prevent this completely, and for that purpose, it is necessary to seal the valve safely, firmly and permanently by joining by welding or brazing. A sealing mechanism made of a high polymer such as rubber is incomplete.

Further, the sealing condition has a great influence on the performance of the valve, but it is extremely difficult to perform this sealing reliably in manufacturing, resulting in an increase in cost.

[0011]

SUMMARY OF THE INVENTION In the present invention, the basic structure of the valve body itself is fundamentally different from the prior art, and the inside of the valve box is completely sealed so that there is no external leakage of control fluid, and the valve portion is We propose a fluid control valve with a simple structure and low cost, in which the change rate of pressure, flow rate, and direction can be changed by appropriately controlling the switching speed.

[0012]

SUMMARY OF THE INVENTION The present invention is directed to a directional control valve,
For flow control valves, pressure control valves, and other fluid control valves, do not mechanically connect the drive source such as a motor or solenoid installed outside the valve box and the valve section that is the operating section inside the valve box. , By transmitting the switching force of the valve to the non-actuating portion (secondary side magnet) inside the valve by using the magnetic forces of the pair of magnets which are arranged to sandwich the valve box partition wall and which are attracted to each other, Is to drive.

That is, the present invention does not mechanically connect the drive source arranged outside the valve box and the valve section, which is the operating section inside the valve box, but inside and outside the valve box across the valve box partition. The valve can be slid or rotated by transmitting the switching force of the valve by the primary magnet outside the valve box to the secondary magnet inside the valve box by using the magnetic force of a pair of opposing magnets arranged in The present invention relates to a fluid control valve, which is configured to be driven to.

In the present invention, the primary magnet of the magnets is either a permanent magnet such as a bar magnet or a donut magnet, or an electromagnet, and the secondary magnet is preferably a permanent magnet.

Further, in the above-mentioned present invention, it is preferable that the valve switching force is at least one of a rotational force, a swinging force and a linear force. Next, the present invention will be described based on examples.

[0016]

【Example】

Embodiment 1 (In the case of a rotary valve) FIG. 1 is an explanatory partially cutaway side view of a rotary type four-way switching valve body 21 showing an embodiment of the present invention. In the drawing, 1 is a thick disk-shaped bottom. Is a hermetically sealed cylindrical valve box completely sealed by a valve seat 2 and a partition wall 3 which is a top plate and a side wall, and a rotary valve 6 and a plurality of large and small spur gears 10, which will be described later, are provided in the valve box 1. A speed reducer 12 composed of 11 and the like and a secondary magnet 9 are built in, and they interlock with each other via the drive shafts 7 and 8 to finally cause the rotary valve 6 to rotate and slide at a desired speed.

Reference numeral 18 denotes a speed reducer chamber which is movably fixed to the upper portion of the valve box 1 through a partition wall 3. In the speed reducer chamber 18, a speed reducer 17 composed of a plurality of large and small spur gears 15 and 16 is provided. And a primary side magnet 13 which is arranged so as to face the secondary side magnet 9 in a pair so as to be paired therewith, so that the driving force of the electric motor 19 is transmitted to the primary side magnet 13 via a drive shaft 14. An electric motor 19, which is a drive source, is disposed and fixed above the speed reducer chamber 18.

In the figure, reference numeral 2 is a thick disk-shaped valve seat, and this valve seat 2
Serves as a part (bottom) of the valve box 1. The valve seat 2 has four pipe holes 4a, 4b, 4c, 4 on its flat surface.
d are arranged on the concentric circles at an equal pitch.

Reference numeral 6 is a thick-walled disc-shaped rotary valve. The rotary valve 6 has a lower surface on which a communicating groove 5 for connecting adjacent pipe holes among the above-mentioned four pipe holes, for example, 4a and 4b, 4c and 4d. , 5'are provided symmetrically, and
A valve drive shaft 7 is vertically provided in the upper center portion thereof, and a lower surface thereof is provided in contact with an upper surface of the valve seat 2 so as to be rotatable and slidable.

The rotary valve 5 does not necessarily have to be provided with the two communicating grooves 5 and 5'on a thick disc-shaped one.
A thick fan shape provided with at least one communication groove may be provided so as to be rotatable or swingable.

Embodiment 2 (In the case of a slide valve) FIG. 2 is a partially cutaway side view for explaining a slide type four-way switching valve body 21 showing an embodiment of the present invention. In FIG. Is a valve seat 2 having a U-shaped cross section and a disk-shaped bottom part, a partition wall 3 having a top plate as an upper part, and an airtight cylindrical valve box completely sealed by a side wall. Slide valve 25
And a secondary side magnet 9 and a speed reducer 12 composed of a plurality of large and small spur gears 10, 11 etc. are built in, and through each drive shaft 7, 8 etc. (cylinder, piston rod etc. may be combined) In conjunction with this, the slide valve 25 is slid at a desired speed.

Reference numeral 18 denotes a speed reducer chamber which is continuously fixed to the upper portion of the valve box 1 with the partition wall 3 interposed therebetween. Inside the speed reducer chamber 18, a speed reducer chamber is continuously fixed to a side portion of the speed reducer chamber 18. The speed reducer 17 including a plurality of large and small worm gears 22 and 23 for decelerating and transmitting the driving force of the electric motor 19 as a driving source, and the primary magnet 1
3 is built in, and is configured to reduce the driving force of the electric motor 19 by the decelerator 17 and transmit it to the primary side magnet 13. In this embodiment, the electric motor 19 is disposed and fixed to the side portion of the speed reducer chamber 18, but it may be disposed above the speed reducer chamber 18 as in the first embodiment. In that case, the structure of the speed reducer 17 is similar to that shown in FIG.

Reference numeral 2 in FIG. 2 denotes a valve seat having a U-shaped cross section and a disk-shaped bottom, and this valve seat 2 also serves as a part of the bottom of the valve box 1. In the valve seat 2, four pipe holes 26a, 26b, 26c, 26d are radially arranged at a uniform pitch on a thick U-shaped side wall portion.

Reference numeral 25 is a slide valve in the form of a short-walled cylindrical cylinder. The slide valve 25 has pipe holes on its side surface which are adjacent to each other among the above four pipe holes, for example, 26a and 26b, 26c and 26.
Communication grooves 27, 27 'connecting d are provided symmetrically.

A valve drive shaft 7'is vertically installed at the center of the slide valve 25 having a short cylindrical tubular shape.
And is slidable up and down while sliding along the pipe holes 26a, 26b, 26c and 26d provided in the short cylindrical tubular side wall of the valve seat 2.

The slide valve 25 does not necessarily have to be provided with the two communication grooves 27, 27 ', but may be provided with at least one communication groove so as to be slidable or slidable. The drive shaft 7'of the slide valve 25 is configured to be slidable by combining a cylinder, a piston rod and the like. That is, the rotational force of the secondary magnet 9 is converted into a linear force by the valve drive shaft 7'combined with a cylinder, a piston rod, etc. via the decelerator 12, and the slide valve 25 is slid at an appropriate speed.

The four-way switching valve 21 according to the present invention is constructed as in the above-described first and second embodiments, and the communication groove 5, 5'or 27, 27 'of the rotary valve 6 or the slide valve 25 is connected to the pipe hole 4
a, 4b, 4c, 4d or 26a, 26b, 26c, 2
Any two holes of 6d, for example 4a and 4b, 4c
And 4a, 4b and 4c, and 4a and 4a, by appropriately combining them to establish a communication state, it is possible to freely switch to cooling / heating operation.

Needless to say, the present invention can be applied not only to the four-way switching valve of the above-described first and second embodiments but also to a two-way valve or an ON-OFF valve.

An important feature of the present invention is that the rotary force of the electric motor 19 is utilized by utilizing the magnetic force (attracting force) of a pair of magnets arranged inside and outside the valve box 1 with the partition wall 3 interposed therebetween, or the rotary valve 6 or the slide. By converting to the switching force of the valve 25 and rotating or slidingly driving the rotary valve 6 or the slide valve 25, it is possible to completely prevent external leakage of the control fluid in the airtight valve box 1.

That is, the rotational force of the electric motor 19 connected to the outside of the valve box 1 is reduced by the speed reducer 17 in the speed reducer chamber 18 connected to the outside, and the speed is reduced (suitable for magnetic transmission. Power) rotation speed and torque are transmitted to the primary side magnet 13 (permanent magnet in the case of FIG. 1), and the magnetic force thereof is provided on the opposite side of the partition wall 3 which is the top plate of the valve box 1, that is, inside the valve box 1. It is transmitted to the secondary side magnet 9 (permanent magnet) and driven to rotate in the same direction.

When the rotation of the motor 19 is gradually increased from zero, the secondary magnet 9 is driven following the rotation of the primary magnet 13, so that the speed reducer 17 for the primary magnet is not necessary. .

Next, the rotation or slide drive of the secondary magnet 9 is reduced by the decelerator 12 to the rotary valve 6 or the slide valve 2.
5 is reduced to power adapted to the operation of the valve drive shaft 7,
The rotary valve 6 or the slide valve 25 is rotated or slid at a proper speed via 7 '.

In the above case, the secondary side magnet 9 is preferably a permanent magnet, and the primary side magnet may be either a permanent magnet such as a bar type magnet or a donut type magnet, or an electromagnet.

The gears of the speed reducers 12, 17 are preferably spur gears 10, 11 and 15, 16 of a plurality of sizes, but a worm gear or the like is used depending on the position of the electric motor 19.

In the case of a slide valve, the drive shaft 7'is
The slide valve 25 is configured to be slidable by combining a cylinder, a piston rod and the like (not shown).

[0036]

The present invention fundamentally changes the basic structure of the valve body itself from the conventional one, and mechanically directly connects the drive source outside the valve box and the operating valve portion inside the valve box. Instead, the driving force of the drive source is converted into the switching force of the valve part inside the valve box by using the magnetic force of a pair of opposing magnets arranged with the valve box partition wall sandwiched between them, so that the valve can be rotated or slid. Since it can operate, the inside of the valve box can be completely sealed, and the external leakage of the control fluid such as CFC gas can be completely prevented.

Further, since the rotation and the torque can be combined in any manner by using the drive source motor and the decelerator, the switching speed can be variously controlled to change the pressure, the flow rate and the direction change rate.

Moreover, the valve body according to the present invention has an extremely simple structure, does not need a seal or the like, has a good operability and is inexpensive, and is not only used for a chemical plant or an air conditioner. It can be applied to all fields and is particularly suitable for locations where control fluid leakage is disliked.

[Brief description of drawings]

FIG. 1 is an explanatory partially cutaway side view showing a main part of a fluid control valve (an example of a rotary type four-way switching valve) according to the present invention.

FIG. 2 is an explanatory partially cutaway side view showing a main part of a fluid control valve (an example of a slide type four-way switching valve) according to the present invention.

FIG. 3 is an explanatory diagram of a conventional rotary valve for an air conditioner.

FIG. 4 is an explanatory diagram of a conventional slide valve for an air conditioner.

[Explanation of symbols]

 1-Valve box 2-Valve seat 3-Bulk wall (Valve top plate) 4-Piping hole 5-Communication groove 6-Rotary valve 7-Valve drive shaft 8-2 Secondary magnet drive shaft 9-2 Secondary magnet 10- Spur Gears for Reduction 11-Spur Gears for Reduction 12-Reducer 13-Primary Magnet 14-Primary Magnet Drive Shaft 15-Spur Gear for Reduction 16-Spur Gear for Reduction 17-Reducer 18-Reducer Chamber 19 -Electric motor 20-Bolt 21-Four-way switching valve body 22-Worm gear 23-Gear 24-Motor rotating shaft 25-Slide valve 26-Piping hole 27-Communication groove 31-First piping hole 32-Second piping hole 33- Third piping hole 34-Fourth piping hole 35-Valve seat 36-Communication groove 37-Communication groove 38-Operating shaft 39-Rotary valve 40-Valve case 41-Shaft hole 42-Partition wall 43-Machine room 44-IC 45 -Motor 46-Gear 47-Micro switch 8-micro switch 49-lever 50-communication pipe 51-four-way switching valve 60-cylindrical cylinder 61-first piping hole 62-second piping hole 63-third piping hole 64-fourth piping hole 65-valve seat 66 -Valve Slide 67-Piston Linder 68-Piston Linder 69-Piston Rod 70-Room 71-Room 72-Room 74-Solenoid Valve

Claims (5)

[Claims] 1. A drive source arranged outside the valve box and a valve section, which is an operating section inside the valve box, are not mechanically connected, but are arranged inside and outside the valve box with a valve box partition wall interposed therebetween. By transmitting the switching force of the valve by the primary side magnet outside the valve box to the secondary side magnet inside the valve box by using the magnetic force of a pair of opposing magnets, the valve can be slidably or rotatably driven. A fluid control valve comprising: 2. The fluid control valve is any one of a directional control valve, a flow control valve, a pressure control valve and the like.
The fluid control valve described. 3. The driving source is one type selected from a motor, a solenoid, etc.
Alternatively, the fluid control valve described in 2. 4. The valve switching force is at least one of a rotational force, a swinging force, and a linear force.
The fluid control valve described. 5. The fluid control valve according to claim 1, wherein the primary magnet of the magnets is one of a permanent magnet such as a rod magnet and a donut magnet, or an electromagnet.