SU1287125A1 - Limit level indicator - Google Patents

Abstract

The invention relates to electromechanical devices for monitoring and regulating heat and power parameters, in particular liquid level. The limit level signaling device contains an electromagnetic switch with separated magnetic conductors 1 and 2, winding 3, and 4 and 5, rigidly connected to a friend. Anchor 4

Description

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through contact group 8 is included in the power supply circuit of the actuator. The detector contains a float sensor 20 of a level with a permanent magnet 18, mounted on ferromagnetic guide brackets 10 and 11, which are located in mutually intersecting planes and are connected

one

The invention relates to electromechanical devices for monitoring and regulating heat and power parameters, in particular the level of a liquid, and can be used in systems for automatic control of diesel installations and in the chemical industry.

The purpose of the invention is to simplify the design of the detector.

FIG. 1 shows the detector, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 - fragment of the interaction of the pole of the emergency level with the permanent magnet of the float level sensor.

The detector contains an electromagnetic relay with separated magnetic cores 1 and 2, winding 3, two crust 4 and 5. Anchor 4 is suspended on elastic power link 6 (spring), and measles 5 is suspended on elastic power link 7 (spring). Anchor 4 is rigidly connected to core 5 and connected to the power supply circuit of the actuator through contact group 8, Magnetic circuits 1 and 2 are pressed into separator 9 and connected to ferromagnetic brackets 10 and 11, forming three pairs of poles, respectively 12 and 13, 14 and 15, 16 and 17, whereby the first two pairs are of the same polarity, and the third pair has the opposite polarity. A pair of poles 14 and 15 is optional.

The detector contains a permanent magnet 18 with insulating plates 19, which is mounted on the guide ferromagnetic brackets 10 and 11. The permanent magnet 18 is connected to the float level sensor 20.

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with magnetic cores 1 and 2. The ferromagnetic brackets of an electromagnetic relay have an additional pair of poles 14 and 15 installed at the level of the upper limit level and located in planes parallel to the planar level. These are the movements of a permanent magnet, which simplifies the signaling device. 4 Il.

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The limit level detector contains an additional permanent magnet 21 fixed on an elastic force bond 22 fixed on the supporting surface 23. The additional permanent magnet 21 has a contact group 24 for connecting the winding of the electromagnetic relay to the power supply.

The pairs of poles 14, 15 and 16, 17 of the clips 10 and 11 are the cutters of a part of the magnetic flux of the permanent magnet 18 and their contact area is calculated on the actuation of the core 4 (Fig. 3), and the poles 12 and 13 have a contact area with a constant a magnet 18 sufficient for the full magnetic flux relay to pass into the electromagnetic system for the operation of the core 5 (Fig. 4).

The detector works as follows.

An additional pair of poles 14 and 15 of the relay is installed at the level of the upper limit level and is located in planes parallel to the plane of movement of the permanent magnet 18. In the operating state of the terminal is about. The coils 3 are connected to the normally open contact group 245 of measles 4 and 5 held by their springs 6 and 7 in the deflected position, the permanent magnet 18 lies under the action of the weight of the float sensor 20 level at the poles 16 and 17 of the brackets 10 and 11. The polarity is on the additional The permanent magnet 21 is such that it is pushed away from the magnetic circuit 1 associated with the permanent magnet 18. Contact group 24 is open and winding 3 is de-energized.

As the fluid level rises, a permanent magnet 18 with a level 20 float sensor floats up and moves upward to a pair of poles 14 and

 15 staples 10 and 11. At the moment of detachment of the permanent magnet 18 from the poles 16 and 17, the permanent magnet 21 is attracted to the magnetic circuit 1, the contact group 24 is closed and the winding 3 is connected to a power source.

At a certain moment, the permanent magnet 18 is caught by the poles 14 and 15. Under the action of the total magnetic flux, the bark 4 is attracted to the core of the magnetic circuit 2, and the glue of the constant group 8 is closed, transmitting an electrical signal to the actuators.

With the subsequent lowering of the liquid level at a certain moment, under the influence of the weight of the float level sensor 20, the permanent magnet 18 is detached from the poles 14 and 15 of the electromagnetic relay. The relay coil, operating in solenoid mode, holds measles 4 in a tightened position. Only after the permanent magnet reaches 18 poles 16 and 17 of the brackets 10 and 11, the magnetic flux weakens and the bark 4 is returned to its original position by the action of the spring 6. At the same time, an additional permanent magnet 21 is moving away from the magnetic circuit 1, opening the supply circuit of the winding 3 of the relay.

If the liquid level after processing by the contact group 8 kor 4 of the signal to the actuators and then rises, the permanent magnet 18 reaches the poles 12 and 13, and under the action of an enhanced total magnetic flux, the measles 5, having a more rigid spring 7 as compared to the spring 6 kor 4, with

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pulls up to magnetic circuit 2 and processes its key on contact group 8, transmitting an alarm signal to the actuators.

After the emergency situation is eliminated and the liquid level is lowered, the permanent magnet 18 is detached from the poles 12 and 13, the measles 5 is detached from the magnetic circuit 2, thereby removing the alarm signal.

Claims (1)

Invention Formula five 40 A limit level detector containing two core electromagnetic relays with separated magnetic conductors, one of which is suspended by an elastic force coupling and rigidly connected to another core suspended by an elastic power link and acting on a contact group included in the power supply circuit. an actuator, a float level sensor with a permanent magnet mounted on ferromagnetic guide brackets located in mutually intersecting planes and connected to the magnetic cores, 0 will complement a permanent magnet, mounted on an elastic power link, has a contact group for connecting the winding of an electromagnetic relay to a power source and is in contact with one of the magnetic conductors, characterized in that, in order to simplify the indicator, the ferromagnetic brackets of the electromagnetic relay are provided with an additional a pair of poles installed at the level of the upper limit level and placed in planes parallel to the plane of movement of the permanent magnet. 0 five 35 bt /. . at fig 2 : TTtTTtAraraT 77 ff; e fig-3 nineteen -fTOH g9t / e. f fig-3 nineteen