JPS6024353B2 - rotary valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rotary valve that is installed in the middle of a pipe and quickly shuts off the fluid to be handled.

Generally, in most valves, the valve body inside the valve case and the operating handle outside the valve case are connected by a valve stem, and packing is inserted between the valve case and the valve case. There is.

However, in such a valve, since the valve shaft moves up and down and rotates, the packing is easily worn out and deteriorated, and this causes a problem in that the handled fluid inside leaks to the outside.

In particular, when the fluid being handled is highly flammable or corrosive, this leakage poses a great danger.

As a device that overcomes these difficulties, for example, a cock disclosed in Japanese Utility Model Publication No. 51-30653 is known.

This is a system in which a spherical valve body is installed inside the valve box, and this is operated from the outside using a magnet to open and close the flow path.
Two magnets are placed 90 degrees apart.

However, in this type of cock, the spherical valve body was only held magnetically by an external magnet, so it could not be held in place by changes in the pressure of the inflowing fluid or vibrations from the outside. There was an attempt to inadvertently put the company in a state of dispute.

The present invention has been devised in view of the above-mentioned problems and to solve them.The purpose of the present invention is to prevent inadvertent changes in the pressure of the inflowing fluid, external vibrations, etc. To provide a rotary valve which is prevented from being opened during operation.

The rotary valve of the present invention includes a cylindrical valve box having an inlet and an outlet at both ends in the scale center direction and a partition wall formed inside the outlet side, and an appropriate number of holes formed in the partition wall of the valve box. A valve hole that is eccentric to the center of the valve, a rotor that is rotatable around the axis inside the valve box to form a passage from the outlet to the valve hole, and a rotor that is rotatable around the axis outside of the valve box. A rotatably provided ring body, a valve body provided on the rotor facing the valve hole and capable of closing the valve hole, and a valve body interposed between the rotor and the valve body to move the valve body toward the partition wall. the valve box is made of a non-magnetic material, and
The rotor and the ring 8 must be magnetically linked, and the feature lies in that at least one of them is equipped with a permanent magnet.

In other words, the rotor inside the valve box, which elastically supports the valve body, is magnetically coupled to the rotor outside the valve box, so that the valve can be opened and closed by rotating the ring body.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a longitudinal sectional front view of a rotary valve according to an embodiment of the present invention.

FIG. 2 is its zz sectional view. These indicate the state when the valve is closed. The valve box 1 has a cylindrical shape with an inlet and an outlet ○ at both ends in the inguinal direction, and a partition wall 17 formed inside the outlet side (right side in Fig. 1), and a flange 1 on the inlet side.
9 and is entirely made of non-magnetic material.

The valve holes 18 are formed in number in the partition wall 17 of the valve case 1 and are eccentric with respect to the axis, and are preferably arranged rotationally symmetrically.

In this example, four holes are drilled in four-fold symmetry. The rotor 2 is rotatably provided inside the valve box 1 so as to form a passage from the outlet to the valve hole 18.

In this example, a rotor 2 is rotatably installed inside a valve box 1 via a ring-shaped bearing 6 .

A through hole 20 is bored in the center of the rotor 2, and
The rotor 2 and the partition wall 17 are separated from each other, and a so-called passage is formed therebetween. The bearings 6 are, for example, Teflon rings in consideration of corrosion resistance, and two bearings are interposed between the rotor 2 and the valve body 1.

Since the rotor 2 has a stepped shape and stoppers 12 and 13 such as snap rings are provided on the walls of the rotor 2 and the valve body 1, the rotor 2 and the bearing 6 do not move in the vertical direction. The bearing 6 is
Not limited to Teflon, plastic, ceramic, metal, etc. can also be used.

The bearing structure of the rotor 2 is not limited to one that supports the outer peripheral surface. A shaft may be horizontally extended from the partition wall 17, a shaft hole may be bored in the rotor 2, and the rotor 2 may be inserted into the shaft to be freely rotatable. In the side surface of the rotor 2 facing the partition wall 17, recesses 21 are bored at positions and in numbers corresponding to the valve holes 18.

A spring 7 and a spherical valve body 4 pushed out by the spring 7 are iron-loaded into the recesses 21, respectively. When the valve body cries, it may be pressed against the partition wall 17 by the spring 7, and it will be rotated and displaced as the rotor harp rotates, and the recess flea current and the valve hole current are provided so as to correspond to each other. All the valve holes i8 can be closed by the valve body 4 as shown in FIG.

This is the valve closed state. The valve seat 9 is preferably made of, for example, Teflon, which has less wear, but rubber can be used without any problem.

On the other hand, a cylindrical ring barrel 3 is rotatably provided on the outer periphery of the valve body 1 via a bearing 5. The bearings that support the wheels 8 and 3 are not limited to ball bearings, and any other bearing can be adopted.

An O-ring 16 is inserted into the outer surface of the partition wall 17 of the valve box 1, and the flange 8 is fixed with a mounting screw 10.

The rotary valve thus has a cylindrical shape as a whole, and is attached between the pipes 30 and 31 via the O-rings 14 and 15 at the flanges 19 and 8 at both ends.

At least one of the ring barrel 3 and the rotor 2 includes a permanent magnet, and the two are magnetically coupled.

Therefore, when the wheel drum 3 is rotated, the rotor 2 is rotated accordingly. When the valve is opened, the valve body 4 is in the valve hole 1 as shown in FIG.
8 and block it.

From this state, if the rare arm 3 is rotated approximately 45 degrees, the rotor 2
With the same displacement, the valve body 4 is displaced in the circumferential direction, reaching the open state shown in FIG.

Figures 4 and 5 show x-x, y in Figures 2 and 3.
-y is an enlarged sectional view.

When the valve is open, the valve body 4 does not block the valve hole 18, so the fluid can pass through the valve hole 18 through the through hole 20, through the gap between the partition wall 17 and the rotor 2. can.

Next, the mode of magnetic coupling between the steel wheel 3 and the rotor 2 will be described.

In FIGS. 6 and 7, both the ring barrel 3 and the rotor 2 are made of permanent magnets.

6 shows a combination of two-pole magnets, and FIG. 7 shows a combination of four-pole magnets.

Since the different poles attract each other, the rotor 2 is also rotationally displaced by the same angle following the ring drum 3. Four poles have higher symmetry than two poles, so accuracy regarding rotational displacement is higher.

Of course, the accuracy will further increase if permanent magnets with a larger number of poles are loosely matched.

However, if the symmetry of the valve holer 8 is m and a nodal permanent magnet is used, it is desirable that tn≦m.

If not, the rotor 2 when fully closed relative to the cylinder 3
This is because the position of is not uniquely determined. It is also possible to use only one of the ring chest 3 and the rotor 2 as a permanent magnet.

FIG. 8 shows an example in which the ring barrel 3 is a permanent magnet, and the rotor 2 is made of a ferromagnetic material F that is elongated vertically and is not magnetized.

In FIG. 9, on the contrary, the rotor 2 is made of a permanent magnet, a part of the ring drum 3 is provided with an unmagnetized ferromagnetic material F, and the remaining part is made of a non-magnetic material P.

In the example described above, the valve body is spherical, but it is not limited to this.
A plate-shaped valve body with a wider contact area may also be used. This has the advantage that the diameter of the valve hole 18 can be made larger and that there is more leeway in setting the valve in the closed state.

To open and close the rotary valve, you can either rotate the wheels 8 and 3 directly by hand, or you can attach a gear to the wheels 8 and 3 and drive this with a motor.

In addition, in order to know whether the valve body 4 is definitely blocking the valve hole 18 or not, a pressure detector is installed on the outlet piping to confirm that the valve is closed due to a decrease in pressure. It's okay.

As mentioned above. According to the present invention, the following excellent effects can be achieved. {1} The rotation inside the valve box, which elastically supports the valve body, is magnetically coupled to the ring body outside the ticket box, so that the valve can be opened and closed by rotating the ring chest, so the pressure of the inflowing fluid can be reduced. Even if changes or external vibrations occur, the system will not become inadvertently in a state of concern.

As a result, it is possible to prevent troubles caused by careless flow of fluid, making it extremely safe.

'21 Since the outside and inside are separated, it can be suitably used for the purpose of protecting the knees. '31 Since there is no gland packing etc., the sealing performance will not deteriorate due to aging.

■ Since the inlet and outlet are on the same axis, it is convenient for piping and can be made smaller.

'5- If fluid flows backwards, the spring is pressed and the valve body opens, so there is no chance of malfunction.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a rotary valve according to an embodiment of the present invention. FIG. 2 is a z-z sectional view thereof. FIG. 3 is a similar view when the valve is open. FIG. 4 is an enlarged sectional view taken along the line xx in FIG. 2. Figure 5 shows
FIG. 4 is an enlarged y-y cross-sectional view of FIG. 3; FIGS. 6 to 9 are schematic diagrams illustrating combinations of magnetic coupling between the ring and the rotor.
1 is a valve box, 2 is a rotor, 3 is a shell, 4 is a main body, 7 is a spring, 17 is a partition wall, 18 is a valve hole, and 20 is a through hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. A circumferential valve box with an inlet and an outlet at both ends in the axial direction, and a partition wall formed inside the outlet side, and an appropriate number of holes formed in the partition walls of the valve box to make the valve box eccentric with respect to the axis. A rotor is provided inside the valve box so as to be rotatable around an axis to form a passage from the outlet to the valve hole, and a ring is provided outside the valve box so as to be rotatable around an axis. A body, a valve body provided on a rotor facing the valve hole and capable of closing the valve hole, and a spring interposed between the rotor and the valve body to bias the valve body toward the partition wall. Has various ingredients,
A rotary valve characterized in that the valve body is made of a non-magnetic material, and at least one of the rotor and the ring body is equipped with a permanent magnet so that the rotor and the ring body are magnetically linked.