SU1364933A1 - Pressure-signalling device - Google Patents

Abstract

The invention is intended to control the pressure of liquid and gaseous media in various sectors of the national economy. The purpose of the invention is to improve performance and increase reliability by eliminating contact bounce. The change in pressure causes the displacement of the free end of the manometric tube, which is transmitted through the kinematic pair to the axis of rotation 3. The rotation of the axis 3 is fixed by the arrow 4, which moves the lead 9 with the magnet 7. When approaching the reed switch 5, the magnet 7 breaks the contacts for a while, and when it is removed from it, it closes them again. At the next moment, the magnet 7 approaches the reed switch 6 and blinks its contacts. The relay is turned on and set to self-blocking via the reed contact of the reed switch 6, which leads to the activation of the alarm. When the pressure enters the specified limits, the driver 9 together with the arrow 4 and the magnet 7 move in the opposite direction: first the reed switch 6 closes and releases its contact, and then the magnet 7 when it approaches the reed switch 5 breaks its contact and thereby de-energizes the relay, the automatic signaling is turned off . 4 il. (L

Description

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The invention relates to automation equipment and is intended to control the pressure of liquid and gaseous media in various areas of the national economy, and the underlying principle can be applied in other signaling devices: pressure sensors, gauges, etc.

The purpose of the invention is to improve the operational characteristics and increase the reliability of work by eliminating contact bounce.

FIG. 1 shows a circuit diagram of a pressure detector; in fig. 2 is a kinematic diagram of a pressure detector; in fig. 3 shows the arrangement of the reed switches in the signaling device; in fig. 4 is a diagram of the mutual arrangement of the gerkons and the magnet.

The pressure detector contains a manometric tube 1, a transmission mechanism 2, an axis 3, an arrow 4, a separate prefix made on the basis of reed switches 5 (G1) and 6 (G2) and

ten

15

Vani can be discerned by entering additional indicators of the trigger points of the detector.

The pressure detector works as follows.

The change in pressure causes the movement of the free end of the pressure tube 1, which is transmitted through axis 2 to axis 3 and rotates the latter. The rotation of the axis 3 is fixed by the index arrow 4. The index arrow 4 moves the lead 9 with the fixed magnet 7 fixed on it in the direction of the clockwise movement (Fig. 4). Magnet 7, having approached the reed switch 5 (G1), opens its contacts for some time (Fig. 1), and then closes them again when moving away from it. The next moment, the magnet 7 approaches the reed switch b (G2) and closes its contacts, while the relay P1 is turned on and is set to self-blocking via the reed contact 6 of the reed switch 6 and the closing contact of the relay P1, which indicates the activation of the alarm. R further, when the pressure is within the prescribed limits, the leash 9 Each point of operation of the bailiff-30 along with the arrow 4 and the magnet 7 of the motor 20

25

Permanent magnet 7, I trigger points.

and pointer

km is full. ;; reed switches 5 and 6 (opening and closing contacts), which: are mounted on the pointer 8 1ch operation, and one type of connection S (G1) with the opening contact is connected to one end of the winding of the ground magnetic relay P1 and the first output another herkgzna, G2) with a closing contact, h a different output - with a closure (dim komtak-mr electromagnetic pejie PI, another vyhmy; damming the relay P1 podklk chrn to the first power wire V 1, and other conclusions of the locking contacts the reed switch and electromagnetic relay P1 are connected to the second prg The power supply V 2, while the permanent magnet 7 is mounted on the leash 9, mechanically connected to the heating chamber, and the reed switch 5 is opened parallel to the Herxnes 6 with the closing contact at least 0.9-1.1 the amplitudes of oscillations of the arrow signalizer .-. pa. And the reed switch 6 should be issued, as close as possible to the axis of symmetry of the pointer 8 in order to increase the accuracy of the sig and alisat-rap operation.

0

five

0

five

zhuts in the opposite direction: first, the reed switch 6 closes and releases its contact, and then the magnet, when approaching the reed switch 5, breaks its break contact and, therefore, caMiiiM de-energizes the operation of P1, signaling

off automatically i

In the proposed device, the electrical contact bounce is completely eliminated when the arrow of the signaling device oscillates (near the switch-on point), since the activation of the alarm and its shutdown occur at different values of the medium pressure — iorkon 6 and 5, respectively. With this, the reed switch 5 should be located from the reed switch 6 at a distance of not 0.9-1.1 amplitude of oscillations of the arrow of the pressure indicator. The pre-burned signaling device makes the most complete use of the pre; It has a {{hr (; l-) stat: and: manual shutdown and contact bounce.

Claims (1)

Invention Formula Device for sigil .-: pressure testing, containing manometric pipes a gear unit, an axis, a pointing arrow, a leash connected to the arrow with a permanent magnet attached to it, an indication of actuation points in the form of holders with reed switches and an alarm system, which in order to improve performance and reliability the account of the elimination of contact bounce, on the holder are parallel to each other the first output of the closing reed switch is connected to the first output of the disconnecting reed switch and to one end of the relay coil, the other end of which is connected to the single pole of the power supply, the other pole of which is connected to the second output of the closing reed switch and the first output of the closing contact of the relay, the second output of which is connected with the second pin of the reed switch. P (5) P1 yr 16} 1. 7 9 eight / fig.z