JPH01150084A - Controller - Google Patents

Abstract

PURPOSE:To prevent controlled fluid from its outleak by mounting an upper part magnet to a piston while a bottom part magnet to a valve unit and magnetically connecting the piston to the valve unit while separating a driving part from a valve unit housing part by a horizontal partitioning plate. CONSTITUTION:An upper part chamber 22 and a bottom part chamber 23 are formed by a horizontal partitioning plate in a body 11. A bottom part magnet 51 is mounted to the upper part of a valve unit 31 housed in the bottom part chamber 23. An upper part magnet 52 is mounted to a piston 41 housed in the upper part chamber 22. Mounting both the magnets 51, 52 in a direction repulsing each other, when the piston 41 moves down, the valve unit 31 moves down closing a valve, and when the piston 41 moves up, the valve unit 31 moves up by a spring 34 opening the valve. Thus because a bottom cylindrical member 13 of the body 11 is closed by the partitioning plate 21, controlled fluid is prevented from its outflow.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a controller used for ON-OFF control of fluid flow.

Conventional technology and its problems This type of controller includes a body provided with a controlled fluid port, a plug housed in the body, and an actuator for the plug. A device in which a controlled fluid port is opened and closed by a controlled fluid port is known, but this has the following problems. In other words, the plug is in direct contact with the controlled fluid, and since the plug and the actuator are connected and the connection cannot be broken, the controlled fluid can escape from the body through the gap between the body, the plug, and the actuator. It may leak.

An object of the present invention is to provide a controller that solves the above problems.

Means for Solving the Problems A controller according to the present invention has an upper chamber and a lower chamber formed in a hollow body by a horizontal partition plate,
A controlled fluid introduction port is provided at the bottom of the body such that one end thereof is opened at the bottom of the lower chamber, and a controlled fluid outlet port is provided at the bottom of the body such that one end thereof is opened at the side surface of the lower chamber, and a plug slides up and down into the lower chamber. A piston is fitted into the upper chamber so as to be slidable up and down, and the lower surface of the plug is brought into close contact with the opening edge of the controlled fluid introduction port, thereby closing the opening. A pressurized fluid supply port is provided at the top of the body so that fluid pressure acts on the top surface of the piston, a spring is provided that biases the plug and the piston upward, a lower magnet is attached to the plug, and a lower magnet is attached to the bottom of the body. The upper magnet is attached to the piston so as to be repulsive to the magnet and to face the lower magnet with a partition plate interposed therebetween.

Example Embodiments of the invention will now be described with reference to the drawings.

The controller has a hollow body 11. body 11
consists of upper and lower cylindrical members 12 and 13. Upper cylindrical member 1
2 has a top wall 14, and the upper cylindrical member 13 has a bottom wall 15. A female thread 16 is provided at the lower end of the inner surface of the upper cylindrical member 12, and a male thread 17 is provided at the upper end of the outer surface of the upper cylindrical member 13. By screwing both screws 16 and 17 together, the upper and lower cylindrical members 12° 13 are connected. The periphery of the horizontal partition plate 21 is fixed to the edge of the upper end opening of the upper cylindrical member 13 so as to close it, and thereby an upper chamber z2 and a lower chamber 23 are formed inside the body 11. ing. Both the upper chamber 22 and the lower chamber 23 have sides with a circular cross-sectional profile, but the diameter of the former is larger than that of the latter.

A controlled fluid introduction port 24 has one end connected to the lower chamber 2.
A controlled fluid outlet port 25 is provided at the bottom of the upper cylindrical member 13 so that one end thereof is opened at the side surface of the lower chamber 23 . A cylindrical plug 31 is fitted into the lower chamber 23 so as to be vertically slidable. A flange 32 is provided at the upper end of the plug 31, and a lower compression coil spring 34 is provided between the flange 32 and a step 33 provided at the lower end of the side surface of the lower chamber 23.
is mediated. This spring 34 urges the plug 31 upward. As shown in the figure, the lower surface of the plug 31 is brought into close contact with the opening edge of the controlled fluid introduction port 24, thereby closing the opening, and in this state, there is a space between the upper surface of the plug 31 and the lower surface of the partition plate 21. is plug 3
1 movement space is generated. A disk-shaped piston 41 is fitted into the upper chamber 22 so as to be vertically slidable. An O-ring 42 is attached to the outer peripheral surface of the piston 41. A pressurized fluid supply port 43 is provided in the top wall 14 of the upper cylindrical member 12, through which the pressure of the fluid introduced into the upper chamber 22 acts on the upper surface of the piston 41. An annular groove 44 is formed around the partition plate 21 on the upper surface of the upper cylindrical member 13, and the piston 41 and the groove bottom are arranged in the annular groove 44.
An upper compression coil spring 45 is interposed between the lower surfaces. This spring 45 urges the piston 41 upward. As shown in the figure, in a state where the lower surface of the piston 41 is in contact with the upper surface of the upper cylindrical member 13, the piston 41 is located between the upper surface of the piston 41 and the lower surface of the top wall 14 of the upper cylindrical member 12.
A moving space of - is generated, but this moving space is plug 3
The distance in the vertical direction is larger than the movement space of No. 1. and,
A lower magnet 51 is placed on the top of the plug 31 and the piston 4
Upper magnets 52 are embedded in the lower portions of the magnets 1, respectively. Both magnets 51 and 52 repel each other and are disk-shaped, but the diameter of the former is larger than that of the latter.

As mentioned above, the drawing shows the plug 31 and the piston 41 at the lower limits of their respective travel strokes, and the opening of the controlled fluid introduction port 24 being closed by the plug 31. That is, in this state, pressurized fluid is supplied to the upper chamber 22 through the pressurized fluid supply port 43, and fluid pressure acts on the upper surface of the piston 41, and the fluid pressure resists the force of the upper compression coil spring 45. The repulsive force of both magnets 51 and 52 pushes down the plug 31 against the force of the upper compression coil spring 45. When the supply of pressurized fluid is stopped from this state, the fluid pressure acting on the upper surface of the piston 41 disappears, and the piston 41 is pushed up by the upper compression coil spring 45. Then, the distance separating both magnets 51, 52 from each other becomes larger, and the repulsive force of both magnets 51, 52 becomes smaller, and the lower compression coil spring 34 pushes the plug 31 against this reduced repulsive force. As a result, the controlled fluid introduction port 2
4 openings are opened.

Effects of the Invention According to this invention, two chambers are formed inside a hollow body by a partition plate, a plug and a piston are arranged in each of the two chambers, and the repulsive force of the magnet is used between the plug and the piston. Force is transmitted to each other, and since the plug and the piston, which is its actuator, are completely isolated, there is no leakage of controlled fluid outside the body.

Furthermore, since the piston is located within the upper chamber, even if the partition plate is damaged, no fluid will leak outside the body, resulting in a reliable controller.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the invention. 11...Body, 21...Partition plate, 22.23...
・Chamber, 24, 25...Controlled fluid port, 31
... Plug, 34°45... Spring, 41... Piston, 43... Pressurized fluid port, 51, 52... Magnet.

Claims (1)

[Claims] An upper chamber 22 and a lower chamber 23 are formed in the hollow body 11 by a horizontal partition plate 21, a controlled fluid introduction port 24 has one end opened at the bottom of the lower chamber 23, and a controlled fluid outlet port 25 opens one end thereof. are provided at the lower part of the body 11 so as to open at the side surface of the lower chamber 23, and the plug 31 is fitted into the lower chamber 23 so as to be able to slide up and down, so that the lower surface of the plug 31 is connected to the opening edge of the controlled fluid introduction port 24. A piston 41 is fitted into the upper chamber 22 so as to be able to slide up and down, and a pressurized fluid supply port is provided so that fluid pressure acts on the upper surface of the piston 41. 43 is provided on the upper part of the body 11,
Springs 34 and 45 are provided to urge the plug 31 and the piston 41 upward, respectively, and a lower magnet 51 is attached to the plug 31.
the lower magnet 5 through the partition plate 21.
1, the upper magnet 52 is placed opposite the piston 41.
controller installed in.