SU840822A1 - Liquid level regulator - Google Patents

Description

The invention relates to systems for the automatic regulation of technological processes and is intended to automatically maintain the level of liquid in vessels at a predetermined value when automating production processes in various industries. Known level regulators are known, containing a float, in the hole of which a tube of non-magnetic material is installed, covered by a permanent ring magnet attached to the fl and t27 bench. The disadvantages of the known regulators are that they have a layered structure, low reliability and sensitivity. The purpose of the invention is to simplify and increase the reliability of the controller. The goal is achieved by the fact that in a fluid level regulator containing a float in a hole of which a tube of non-magnetic material is installed, covered by an annular permanent magnet fixed to the float, a sensitive element, an indicator and series-connected mechanical displacement transducer into an electrical, signal and control unit , there is also a core with a magnet mounted in the tube, and the sensing element is designed as a rocker arm, one arm of which is equipped with a counterweight and connected the transducer of the mechanical movement to the electric signal, and the other arm of the rocker arm is connected to the setter and the core. Moreover, the core contains a holder, with the possibility of axial movement of the load of a non-magnetic material and fixed rollers, one of which is made of magnetic material. Tia FIG. 1 shows the concept of the regulator; FIG. 2 core design, general view. The regulator contains a float 1 with an annular permanent magnet 2 mounted on the tube 3. Inside there is a movable core 4, which interacts through the block 5 with the sensitive element 6, made in the form of a rocker arm and connected to the drum 7 of the unit. The unit besides the drum contains a reduction mechanism 8 and the manual pointer 9 position. The second shoulder of the rocker arm, balanced by the counterweight 10, interacts with the mechanical transducer

movement in the electrical signal 11, which through the phase-sensitive control unit 12 controls the actuator 13 and the regulator 14.

The movable core is made in no longer non-magnetic cage 15, in which chassis are locked, the rotating rollers 16 and 17, AG in the upper non-magnetic weight 18, which is connected to the drum 7 of the adjuster and interacting with the shoulder. wherein the load is attached with the possibility of movement within the yoke.

The regulator works as follows.

If the amount of incoming fluid Q does not correspond to the amount of liquid CLp consumed to maintain a normal technological regime, then the level of the regulated fluid in the reservoir changes. This causes the permanent magnet 2 float 1 to be raised or lowered. Due to the magnetic force of the core 4 with the permanent magnet, when the float is moved, the balance of the balance arm b previously balanced by the counterweight 10 at the value of the adjustable parameter specified by the pointer 9 is disturbed.

When the balance of the rocker arms changes, depending on the direction of change, the level, its arm interacts with the mechanical displacement transducer into the electrical signal 11 and, through the phase-sensitive control unit 12, the actuator 13 acts on the regulator 14, reducing or increasing the flow of 0. a reservoir with controlled medium up to a predetermined value of uroin, at which again the balance of the rocker arm is reached.

The implementation of the movable core in the form of rotating rollers makes it possible to completely eliminate the friction of the core on the tube, to which the side of the core is pressed against

magnetic force with a permanent magnet.

The use of free load inside the yoke allows keeping the connecting element (cable, tape) of the core with the rocker and setting unit under constant tension.

The proposed level regulator is implemented on the basis of simple and reliable elements and allows to provide high accuracy and sensitivity over the entire adjustment range, and the sensitivity can be adjusted within wide limits by the ratio of the arms of the rocker arms.

Claims (2)

1. A fluid level regulator containing a float, in the hole of which a tube of non-magnetic material is mounted, enclosed by an annular permanent magnet mounted on the float, a sensing element, a control unit and a transducer of a mechanical movement into an electrical signal and a control unit that are differently connected, that, in order to simplify and increase the reliability of the regulator, it contains a core with a magnet mounted in the tube, and a sensitive element Designed as a rocker, one arm of which is equipped with a counterweight and connected with a transducer of mechanical movement into an electrical signal, and the other arm of the rocker arm associated with a control unit and a core. 2. The regulator according to claim 1, characterized in that the core comprises a clip made of a non-magnetic material, in which a load of non-magnetic material is mounted for axial movement Sources of information taken into consideration. Upon examination 1.Kosharsky 5.D. Automatic instruments, controllers and control machines. L., 1968, p. 565-572. 2.Agaykin D.I. Sensors control. and regulation. M., 1965, p. 399442. unu -4 (3: (o " t h trUU ll I I II I ill I MM I fflllll / Tt - / -. CM