JPH0226380A - Pinch valve - Google Patents

Abstract

PURPOSE:To obtain a pinch valve having a simple operating mechanism and a satisfactory operation property by providing a flexible valving element enclosing magnetic fluid in a pipe body and a superconducting magnet on the outside of the pipe body. CONSTITUTION:A flexible valving element 2 enclosing magnetic fluid 3 is provided in a pipe body 1. A superconducting magnet 4 having a superconducting coil provided on the outside of the pipe body 1, corresponding to the flexible valving element 2. And, by the magnetic force generated from the superconducting magnet 4 the magnetic fluid is attracted with the superconducting magnet and the total valving element 2 is deformed so as to close the pipe body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pinch valve as a means of controlling fluid.

[Conventional technology]

As is well known, a pinch valve is an expansion valve made of a flexible material such as rubber that is installed in a fluid flow path, and the flow path is expanded by injecting pressurized gas such as air into the valve and inflating it. Perform occlusion.

This pinch valve has the advantage that it requires fewer sealing parts than valves with other mechanisms, and is highly watertight.

[Problem that the invention seeks to solve]

However, as mentioned above, conventional pinch valves open and close by inflating and deflating the valve by pressurizing air, etc. into and out of the expansion valve, so the valve operation mechanism is troublesome and it takes time to open and close the valve. This was the case.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pinch valve which eliminates the disadvantages of the conventional example, has good operability, and has a simple operating mechanism.

[Means to solve the problem]

In order to achieve the above object, the present invention is characterized in that a magnetic fluid is sealed in a flexible valve body provided inside a tube body, and a superconducting magnet made of a superconducting coil is provided outside the tube body in correspondence with the valve body. It is.

[Effect]

According to the present invention, when the superconducting magnet generates magnetic force, the magnetic fluid within the valve body is attracted toward the superconducting magnet, and the entire valve body deforms to close the pipe body.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show a first embodiment of the present invention, in which a valve body 2 that can be deformed by a flexible member such as a rubber material is provided inside a pipe body 1.
A magnetic fluid 3 is sealed inside the valve body 2. It is assumed that the valve body 2 is normally flat in the longitudinal direction of the tubular body 1, as shown in FIG. 2, and a flow path is secured within the tubular body 1.

On the other hand, on the outer periphery of the tubular body 1, a superconducting electromagnet 4 made of a superconducting coil was provided on the opposite side to the location where the valve body 2 was provided, so that energization could be controlled. Incidentally, a superconducting coil is a coiled superconductor having zero electrical resistance, and the superconducting electromagnet 4 is one in which an electric wire 4a is connected to this superconducting coil, and the energization can be controlled. By using superconductors, it is lighter and has a higher magnetic flux density than normal electromagnets.

Next, usage and operation will be explained.

When the superconducting electromagnet 4 is not energized, the valve body 2 remains flat as shown in FIG.
A sufficient gap is provided between the pipe body 1 and the inner wall of the pipe body 1 to ensure a flow path. This is the open state of the valve.

Next, a superconductor is applied to the magnet 4 to close the valve. As a result, the electromagnet 4 generates a strong magnetic force and attracts the magnetic fluid 3 inside the valve body 2, thereby causing the valve body to move as shown in FIG.
is deformed in the direction of attraction, and the inside of the pipe body 1 is closed by the valve body 2.

To open the valve again, the superconducting electromagnet 4 is de-energized and the valve body 2 returns to its original flat state.

3 and 4 show a second embodiment of the present invention, in which a valve body 2 that can be deformed by a flexible member such as a rubber material is provided inside a pipe body 1.
This is the same as the first embodiment in that a magnetic fluid 3 is sealed inside the valve body 2, but a valve body 2 is provided on the outer periphery of the pipe body 1 corresponding to the valve body 2. A superconducting permanent magnet 5 made of a superconducting coil was installed on the opposite side from the mounting point.

Then, a recess 6 is formed in the wall of the tube body 1 on the side where the valve body 2 is provided so as to bulge outward, and a superconducting electromagnet 7 made of a superconducting coil is provided within this recess 6.

This superconductivity! The magnet 7, like the superconducting electromagnet 4 of the first embodiment, can be controlled to be energized by an electric wire 7a.

On the other hand, although the upper surface of the recessed portion 6 is closed by the valve body 2, a ventilation hole 8 is provided in the constituting wall thereof so as not to form an airtight chamber.

The usage and operation are almost the same as the first embodiment, but
When the valve is opened, the superconducting electromagnet 7 is energized to generate magnetic force as shown in FIG. If the magnetic force of the electromagnet 7 is set to be stronger than the magnetic force of the superconducting permanent magnet 5, the magnetic fluid 3 in the valve body 2 will be absorbed into the recess 6 on the electromagnet 7 side.
The valve body 2 is retracted inward, and there is almost no protrusion of the valve body 2 within the pipe body l.

Therefore, the flow path within the tube body 1 is ensured.

On the other hand, if the power to the superconducting electromagnet 7 is cut off when the valve is closed, only the magnetic force of the superconducting permanent magnet 5 acts, and the magnetic fluid 3 is attracted to this magnet 5'.

As a result, the valve body 2 also deforms so as to protrude toward the magnet 5, thereby closing the inside of the tube body 1.

To open the valve again, it is sufficient to energize the superconducting electromagnet 7.

Although not shown in the drawings as another embodiment, the mounting positions of the superconducting permanent magnet 5 and the superconducting electromagnet 7 may be mutually changed. In that case, the magnetic force of the electromagnet 7 is made stronger than the magnetic force of the magnet 5, and when the valve is closed, the electromagnet 7
energize.

〔Effect of the invention〕

As described above, the pinch valve of the present invention can operate the valve body using magnetic force, and there is no need to introduce or remove gas into or out of the valve body as in the conventional case, so the operation mechanism is simple and operability is improved. It's good.

Furthermore, since the magnetic force is applied by a superconducting magnet, even a small magnet can be powerful, and reliable opening/closing operation can be achieved with less energy.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing the first embodiment of the pinch valve of the present invention when the pinch valve is energized, FIG. 2 is a longitudinal sectional front view when the pinch valve is open, and FIG. FIG. 4 is a longitudinal sectional front view of the same when it is opened. 1... Pipe body 2... Valve body 3... Magnetic fluid 4... Superconducting electromagnet 4a... Electric wire 5... Superconducting permanent magnet 6... Recess 7... Superconducting electromagnet 8...・Vent hole

Claims (1)

[Claims] A pinch valve characterized in that a magnetic fluid is sealed in a flexible valve body provided in a tube body, and a superconducting magnet made of a superconducting coil is provided outside the tube body in correspondence with the valve body.