SU1560983A1 - Pneumatic device for indicating level of loose and lump materials - Google Patents

Abstract

This invention relates to level control and ensures reliable handling of abrasive materials. When the hopper 8 is filled with material, chamber 2 deflects and the flow indicator 10 detects the achievement of a predetermined level, since air begins to escape through nozzle 3. 3 sludge.

Description

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The invention relates to a technique for controlling the level and control of the dosing process of bulk and lump materials and can be used in the coal, food and chemical industries.

The purpose of the invention is to increase the reliability of the detector when monitoring abrasive materials.

Figure 1 shows the structural diagram of the proposed detector; 2 shows the position of the nozzle in the initial state; in FIG. 3, the position of the nozzle at the moment the alarm goes off.

The detector includes a housing 1, forming a chamber 2, inside which is installed a branch pipe 3, rigidly connected to the housing 1 by means of partitions 4. The housing 1 of chamber 2 and the branch pipe 3 are rigidly connected to bellows 5 and 6, respectively, forming a bellows suspension attached to the cover 7 of the bunker eight.

The lower part of chamber 2 is filled with low volatile special fluid 9. Overflow pressure is supplied to nozzle 3 via flow indicator 10, as a result of which the liquid level 11 inside nozzle 3 is set below the liquid level 12 in the chamber by a certain value N. Partitions 4 have openings 13, and cover 7 the hopper 8 is a hole 14 through which the camera 2 communicates with the atmosphere.

The detector works as follows.

In the initial position, the level 1 1 of the liquid inside the nozzle 3 is higher than its lower edge by an amount Dp (FIG. 2) and the air does not flow through the nozzle 3 and the indicator 10

When filling the hopper 8 with bulk material, chamber 2 is rigidly fixed

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bellows on the bellows, under the action of the material deviates from the vertical by a certain angle c (.

As a result of the flow of fluid, part of the nozzle edge reaches level 11 (FIG. 3) and the air begins to flow into the chamber 2 under the action of overpressure and then through the openings 13 and 14 into the atmosphere. The flow indicator 10 will record the air flow and, consequently, the achievement of the bulk material of a given

In the proposed detector, the thickness of the chamber walls does not affect the sensitivity and accuracy of the detector, which makes it possible to produce chamber walls of such thickness that ensures the strength and reliability of the detector, both when working with lumpy materials and with abrasive materials (for example, coal dust). The bellows suspension is not directly affected by the materials, since it is sufficiently removed from the core.

Claims (1)

Invention Formula Pneumatic level indicator for bulk and lump materials Containing a chamber with outlets with a rigidly installed branch pipe, as well as a measuring device connected to the branch pipe, in order to improve the reliability of the indicator, the chamber in the upper part is equipped with a bellows suspension and in the lower part it is filled with liquid, while the nozzle is installed vertically with the overlapping of its outlet with liquid, and the measuring device is designed as a flow meter. FIG. 2 Fig.d