RU1800492C - Magnet-controlled switch - Google Patents

Abstract

Usage: electrical engineering, switches and pressure sensors for fluid flow. SUMMARY OF THE INVENTION: a filter 2, a fixed magnet 10, a perforated board 9, a movable element, a board 6 are installed in series in the housing 1. The movable element is made in the shape of a ball, consisting of a protective shell 8 and a permanent magnet 7. The surface of the board 9 is facing movable element, has the form of a movable element. When the flow is supplied through the inlet pipe 11, the movable element is displaced and triggers the magnetically controlled element. 1 ill.

Description

The invention relates to electrical engineering,

The purpose of the invention is to increase reliability by reducing the likelihood of jamming of the movable element and reducing friction forces,

The drawing shows a longitudinal section of a magnetically controlled switch,

The magnetically-controlled switch contains a housing 1, a filter 2, a sealed magnetically-controlled contact 3, a working chamber 4, an output nozzle 5, a perforated plate 6, a movable magnet 7, a shell 8, a perforated plate 9, a fixed magnet 10, an inlet 11 .

Elements 2, 10, 9, 7 and 6 are placed sequentially downstream in the working chamber 4. Elements 2, 10, 9 and 6 are rigidly fixed in the working chamber 4.

The magnet 7 is enclosed in a shell 8 and can be made in the form of a ball, but it is easier to technologically make it in the form of a cylinder and enclose it in a spherical shell, as shown in the proposed device. The protective sheath 8 is anticorrosive and wear resistant since the magnet operates in various fluids. The material of the protective shell may be metal-ceramic bronze. The magnet 7 in the shell has the ability to move along the axis of the working chamber 4. The sealed magnetically controlled contact 3 is rigidly connected from the outside of the housing 1 above the movement zone of the movable magnet 7. The magnet 7 is magnetically connected to the contact 3 and the fixed magnet 10. Perforated board 9 made spherical, concave with respect to the spherical magnet 7. To block the flow of magnet 7 in the shell 8, the radius of the sphere is equal to the radius of the ball. The boards 6 and 9 are provided with openings for passing liquid. The perforated board 6 serves as a stop, preventing the exit of the magnetic connection of the magnet 7 with the magnet 10. Due to its spherical shape, the movable magnet 7 is naturally constantly oriented by the opposite pole to the magnet 10, the magnetization axis of which coincides with the axis of the working chamber 4. Along channels 12 are provided for the passage of fluid through the walls of this chamber; holes 10 are also provided in the magnet 10.

Magnetically controlled switch operates as follows. When a fluid stream is supplied through the inlet pipe 11, the filter 2 filters out all the solid particles from the stream, the magnet 10 passes the liquid through its holes to the perforated plate 9, and, in turn, passes the stream through the holes to the magnet 7 in the shell. Under the action of the flow pressure force, the magnet 7 in the shell is squeezed from the board 9, passing the stream further into the chamber 4. Through channels 12, the stream, washing the shell 8 of the magnet 7, is removed from the working chamber 4 through the holes in the board 6 and the outlet 5.

The movable magnet 7 occupies a working position, determined by balancing the magnetic and hydraulic forces. The sealed magnetically controlled contact 3 closes under the influence of the magnetic field of the moving magnet 7. In this case, the sealed magnetically controlled contact 3 is set relative to magnet 7 so that at a given value of the controlled flux it closes , signaling the presence of a given stream.

Reducing the magnitude of the controlled flux below a predetermined value, the magnet 7 is attracted by the magnet 10 and it moves towards the perforated board 9, with an increase in the distance between the magnet 7 and the contacts 3, the influence of the magnetic field weakens and the contacts 3 open to their original position, interrupting the signal circuit. The board 6 also allows such a variant of the device when the permanent magnet 7 does not occupy an intermediate position in the working chamber 4 under the action of the flux, but is extreme and is pressed by the flux to the board 6. With no flux or at low pressure, its magnet 7 in the shell under the action of a magnet 10 is pressed close to the board 9 and closes the holes in it, without letting flow into the working chamber 4.

The use of the proposed magnetically controlled switch provides the following advantages compared to existing devices: it increases reliability by making the movable magnet in the form of a ball, which allows it to be oriented opposite the pole to the fixed magnet, to exclude all kinds of jamming that was observed with a cylindrical magnet, and spherical shape movable magnet completely eliminated jamming; increased reliability, the elimination of non-failure operation allows to save materials, time for reassembling the device in case of jamming; the implementation of the working body - a moving magnet in the form of a ball allows you to increase the speed of mining by reducing friction with a decrease in the area of the rubbing surface and turning it from a cylindrical to a circle along which the ball touches the wall

a working chamber; increasing the working speed expands the range of application of the device, allowing it to be used in other systems, therefore, the total number of different magnetically controlled switches used is reduced (unified), which leads to a reduction in material costs; the implementation of the movable magnet in the protective shell allows to extend its service life, eliminating corrosion from the transmitted fluid and destruction upon impact on the circuit board, since the magnet is usually made by pressing from powder and, upon impact, the material of the magnet is chipped over time, all this leads to an increase friction, to abrasion, to a decrease in reliability,

Claims (1)

SUMMARY OF THE INVENTION A magnetically-controlled switch comprising a non-ferromagnetic housing with a chamber made with channels along the walls of the chamber, with inlet and outlet nozzles, a fixed permanent magnet; 0 5 0 5 a movable element with a permanent magnet, a perforated plate, a filter mounted in the housing chamber, a magnetically controlled element mounted outside the housing, the permanent magnet of the moving element being mounted for interacting with a fixed permanent magnet and a magnetically adjustable element, characterized in that, in order to increase reliability by reducing the likelihood of jamming of the movable element and reduce friction forces, it is equipped with an additional stop made in the form of a perforated plate, according to the movable element is made in the form of a ball consisting of the said permanent magnet and a protective sheath, the filter, the fixed permanent magnet, the perforated plate, the movable element and the additional stop being sequentially placed in the housing chamber, and the surface of the perforated plate facing the movable element, has the form of a movable element.