SU1485321A1 - Switch using magnetically-controlled contacts - Google Patents

Description

The invention relates to electrical engineering and can be used in

Phil.1

as a signaling device of the end positions of the valve of the pipeline equipment. The aim of the invention is to reduce the size and increase the accuracy of operation. The implementation of the arcuate screen in the form of two elements 8 and 9, rigid mounting element 8 on the rotary axis 10 allows you to install it in the desired. position relative to a pair of reed switch magnet when docking the rotary axis and the housing with the device for which the detector is intended. The mobility of the element 9 relative to the axis 10 makes it possible to adjust its position relative to the second pair of reed switches - a magnet already when the alarm device is installed, which is convenient for maintenance and allows you to increase the reliability of the alarm device due to the possibility of its adjustment. 1 hp f-ly, 2 ill.

SC "1485321

3

1485323

four

The invention relates to electrical engineering and can be used as a signaling device for the end positions of the valve block valve, for example, ball valves.

The aim of the invention is to enhance the functionality by ensuring that it works as an end position signaling device. .

Figure 1 shows the detector, a longitudinal section; figure 2 - section aa in figure 1.

The switchboard includes a case 1, in which the reed switches 2 and permanent magnets 3 are fixed, the reed switches 2 are located in the central bore 4 of the case 1 and are separated from each other by a ferromagnetic partition 5, and the magnets are located in the peripheral bores 6 of the case 1. In case 1 between the reed switches 2 and the magnets 3, an annular groove 7 is also made, in which there is a ferromagnetic screen made in the form of two arcuate plates 8 and 9, one of which - plate 8 is rigidly fixed on the rotary axis 10, and the other - plate 9 is installed on the axis 10 with the possibility of angular movement relative to it on the thread 11 and subsequent fixation of the desired position of the screw 12.

In case 1, mounting windows 13 and 14 are made.

Installation and operation of the device are as follows.

For example, when mounting a device on a ball valve, the closure plug of which rotates 90 ° from one extreme position to another, fix the detector on the crane drive through mounting windows 13 and 14, then install plate 8 through one of the mounting windows, so that the moment of its exit from the space between the first pair of reed switch 2 and magnet 3 corresponds to one of the extreme positions of the plug. The plate 9 at this moment is located between the second pair of the reed switch 2 and the magnet '3.

Then through the window 13 (figure 2) install the plate 9 on the axis 10, turning it on the thread 11 by 90 ° relative to the plate 8, i.e. so that the moment of its exit from the space between the second pair of germs,

con 2 and magnet 3 corresponded to another extreme position of the plug. Screw 12 fix this position of the plate 9.

When turning the rotary axis 10 under the influence of torque from the plug drive, the ferromagnetic screen rotates in the annular groove 7. Both its plates 8 and 9 are located in the space between both pairs of reed switches 2 and magnets 3. At the moment of exit of the plate 8, i.e. when the axis 10 rotates 90 °, from the space between the first pair, the contacts of the reed switch 2 are closed, giving a signal about the extreme position of the stopper. The plate 9 at this time is located between the second pair. Therefore, the contacts of the second reed switch 2 are open.

When the cork is turned in the opposite position, the axis 10 moves backward (at 90 °). At the moment of exit of the plate 9 from the space between the second pair of the reed switch 2 and the magnet 3, the contacts of this reed switch are closed, signaling that the stopper has reached its other extreme position. The partition 5 installed between the reed switches 2, eliminates the influence of the magnet 3, interacting with the opposite of the reed switches.

Hard fixing of one plate of the screen on the rotary axis allows it to be installed in the required position relative to one pair of herkons - a magnet directly when the rotary axis and the housing dock with the device that the alarm will serve. And the mobility of the second plate of the screen relative to the axis makes it possible to adjust its position relative to the second pair of reed switches - a magnet already when the alarm device is installed, which is convenient for maintenance and allows increasing the reliability of the alarm device due to the possibility of its adjustment.

Claims (2)

Claim 1. A switch on magnetically controlled contacts, comprising a housing made of a nonmagnetic material with fixed pairs and a gap between them — a permanent magnet — a magnetically controlled contact and an arc-shaped ferro5 relative to each other magnetic screen mounted on a rotary axis with the ability to move between the elements of these pairs, with some elements of the pairs located in the central bore of the body, and others radially around them, characterized in that, in order to extend the functionality by providing work as a signaling device of end positions , the arcuate screen is made in the form of two elements, the first of which is rigidly fixed on the rotary axis, and the second is mounted on the said rotary axis with the possibility 1485321 6 angular movement and fixation of its position, and in the case mounting windows are made to ensure that the specified element of the arcuate screen can be fixed in different positions. 2. Switchboard, which is equipped with a ferromagnetic partition, magnetically controlled contacts are installed in the central bore of the case, a ferromagnetic partition is located between the magnetically controlled contacts15, and permanent magnets are installed radially around the periphery of the case. Λ-Α FIG. 2