RU1786527C - Magnet controlled switch - Google Patents

Abstract

Usage: electrical engineering, switches and pressure sensors. SUMMARY OF THE INVENTION: a filter 2, a fixed magnet 9, a perforated plate 8, a movable magnet 7, an abutment 6 are installed in series in the housing 1. . 3 ill. i

Description

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The invention relates to the field of electricity, and more specifically, to switches and switches driven by a movable element carrying a magnet, and can be used to automatically turn systems on or off, depending on availability,; no 0t reduced fluid flow.

The starter has a drain tip for the fuel and filling device, containing a housing connected to it, a drain hole in which 6 meters is made and a float level sensor with a permanent magnet interacting with a tight contact connected with the fuel supply elements, a spring-loaded sleeve, movably mounted with the possibility of fixing on the housing in a position that provides a specified distance from the tight contact to the end of the neck of the fuel tank, in which the sleeve in the lower end part ying magnetized.

The disadvantage of this device is its operation only in the vertical position, since in the horizontal position the float does not move along the tip body and cannot open the sealed contacts for disconnecting, for example, an external pump.

A fluid-sensitive switch / ib is known. It contains a housing with inlet and outlet openings, a magnetic float is placed inside the housing, and sealed contacts are rigidly connected to the housing outside the housing, while the magnetic float is magnetically connected to the tight contacts . :; j,; / ./

The disadvantage of this switch is similar to the previous one: it only works in vertical positions; ; T; / / ;;:;

The closest in technical essence and purpose and taken as a prototype is a controllable medium flow switch containing a non-ferromagnetic casing with a working chamber equipped with channels for the medium flow, a filter, a perforated plate, a first permanent magnet, a second permanent in series, are installed in the working chamber permanent magnet, a sealed magnetically controlled contact is fixed on the outside of the housing, while the first magnet is mounted with the possibility of movement along the axis of the working chamber, facing the same pole a second magnet rigidly fixed in the working chamber, the first movable magnet being magnetically coupled to the second magnet and a sealed magnetically controlled contact; ,:.

The location of the magnets with the same poles to each other makes them repel under the influence of magnetic fields around each pole, and at the same time the opposite pole of the movable magnet tends to attract the second magnet, in the first magnet there are torques that jam the movable magnet in the working

chamber, which increases the probability of failure in the switch, reduces its reliability. The torque is determined from the expression: -v -;.;. V V: v ... - ;;., ..-- M - m H sln (mAH),

where is the t-magnetic moment;

H is the magnetic field strength. An object of the invention is to increase reliability by decreasing the likelihood of jamming a movable magnet.

This goal is achieved by the fact that in a magnetically controlled switch containing a non-ferromagnetic casing with a chamber made with channels along the walls of the chamber with inlet and outlet pipes, movable and fixed permanent magnets, a perforated plate, a filter installed in the casing chamber, magnetically controlled an element mounted on the outside of the housing, the movable magnet being able to interact with a fixed permanent magnet and a magnetically controlled element, it is equipped with

additional emphasis, while the filter, a fixed permanent magnet, a perforated plate, a movable magnet and an additional emphasis are sequentially placed in the housing chamber, and the movable and

fixed permanent magnets are turned to each other by different clamped poles.

Comparative analysis with the prototype shows that the claimed device is distinguished by a new element and a new sequence in the arrangement of elements and their relationship with the remaining elements of the device. Comparison of the claimed solution with other technical solutions shows that the permanent magnet switches

widely known ..

However, with the above arrangement of elements and a new connection in the claimed magneto-controlled switch, these

elements exhibit new properties that

leads to increased reliability, ...; Figure 1 shows a magnetically controlled switch, longitudinal section; figure 2 is a section aa in figure 1; Fig. 3 - view B

In FIG. 1. -. :. . -..- .: -.

The magnetically controlled switch contains (Fig. 1) a housing 1, a filter, a magnetically adjustable element 3, a working chamber 4, an outlet pipe 5, an abutment 6, a movable permanent magnet 7, a perforated board 8, a permanent magnet 9, an inlet pipe 10 .

Elements 2,9,8,7,6 are placed sequentially in the housing 1, which begins with the inlet 10. The filter 2, the magnet 9 and the additional stop 6 are rigidly connected to the working chamber 4, in which longitudinal grooves 11 for fluid flow are made. In magnet 9, plate 8 and abutment b, holes are also provided for fluid flow. Magnets 7 and 9 are turned to each other by opposite poles. The magnet 7 is installed in the working chamber 4 with the possibility of movement along its longitudinal axis:

The magnetically controlled element 3 can be made in the form of a sealed magnetically controlled contact. The perforated plate 8 is at the same time an abutment.

The magnetically operated switch operates as follows, v

In the absence of flow, magnet 7 is attracted to magnet 9, pressed against perforated plate 8, contacts 3 are open. When a stream is supplied through the inlet pipe 10, the filter 2 filters out all the solid particles from the stream, the magnet 9 passes through its holes to the perforated plate 8, which then passes through its holes to the magnet 7. Under the action of the pressure force of the stream, the magnet 7 is squeezed from the board 8 , passing the stream further into the chamber 4. Through the holes 11, the stream, washing the magnet 7, is withdrawn from the working chamber 4 through the holes in the stop 6 and the outlet pipe 5. The permanent magnet 7 occupies the working position, reaching the stop b. The sealed magnetically controlled contact 3 closes due to 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 it closes at a given value of the monitored flux, signaling the presence of a predetermined flux ..

When the controlled flow decreases below a predetermined value, the magnet 7 is attracted by the magnet 9 and it moves towards the perforated board 8, 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. .. ;

Using the proposed magneto-controlled switch provides the following advantages in comparison with existing devices: it increases reliability due to the installation of magnets with opposite poles facing each other, which eliminated torsion moments and jamming of the moving magnet in the working chamber, observed at the same pole positions of two magnets increases reliability also by first installing a fixed magnet in the direction of flow, which delays unfiltered fairies magnetic particles, prevents them from entering the working chamber and increasing friction force of the movable magnet against the walls of the working chamber; increased reliability, i.e. reducing reliability, reducing the likelihood of jamming of the movable magnet, eliminates the time required for disassembling and assembling the device during jamming, allows not interrupting the operation of the system where the switch enters, reduces the likelihood of failure of this system; saves material resources by increasing the reliability that would be necessary to restore the system, which includes the switch; less likely to open the holes of the perforated plate with a movable magnet under the influence of vibrations of the device, i.e. fluid is not allowed to pass without a certain pressure.

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 and a movable element made in the form of a permanent magnet, a perforated plate, a filter installed in the housing chamber, A magnetically-controlled element mounted outside the housing, the movable magnet being mounted so as to interact with a fixed permanent magnet and a magnetically-controlled element, such as and so that, in order to increase reliability by reducing the likelihood of jamming of the movable magnet, it is equipped with an additional stop, while the filter, fixed ... permanent magnet, perforated plate, movable magnet and additional stop are sequentially placed in the housing chamber and the movable and fixed permanent magnets are facing each other with opposite poles. Aa form Figure 2