SU1672220A1 - Apparatus for continuous volume bulk materials measurement - Google Patents

Abstract

The invention relates to a device for measuring the continuous volumetric flow rate of bulk material and can be used in the manufacture of building materials, such as expanded clay gravel. When the imbalance of the conveyor belt 1, mounted on one hinge support 4, is disturbed, either by increasing the volume of the material in the hopper 7 or by changing the bulk density of the material in the hopper 7, the speed and, consequently, the volume flow of the material is changed at the outlet of the conveyor. 2 Il.

Description

The invention relates to devices for measuring the continuous volumetric flow rate of bulk material and can be used in construction, in particular in the production of building materials.

Figure 1 shows a diagram of the device in section; figure 2 - the same, end view.

A continuous device for measuring the flow volume of the bulk material contains a belt conveyor 1 with a controlled drive 2, equipped with a tachogenerator 3, and mounted on a pivot bearing 4 and elastic stops 5, frame 6, carrying the belt conveyor 1. Above the loading edge of the belt conveyor 1 The frame 6 is equipped with a bunker 7 without a bottom with a discharge slot. On both sides of the pivot bearing 4, under the frame 6 of the conveyor 1, equilibrium sensors 8 and 9 are installed.

The device works as follows.

The flow of the bulk material produced, for example, expanded clay gravel, flows continuously into the hopper 7, from which it passes through the discharge section of a constant cross section to the conveyor 1 and is then unloaded. The installation location of the pivot bearing 4 is predetermined taking into account the balance of the material placed on the conveyor 1 from the side of the bunker 7, i.e. when filling the bunker 7 on the set volume. In this case, the balance of the entire system with respect to the installation site of the pivot bearing 4 is ensured.

The volumetric flow rate of the material is

Pv Vn B h,

where Vn is the speed of movement of the conveyor belt 1;

In - the width of the discharge gap of the hopper 7 (figure 2);

h - the height of the discharge gap of the hopper 7 (figure 1).

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A certain volume flow rate of material corresponds to a certain speed Vn, at which the bunker 7 has a stable predetermined filling. When the volumetric flow rate decreases, the hopper 7 is supplied with less material than it is discharged from the conveyor belt 1. The volume of material in the hopper 7 decreases and the equilibrium of the device is disturbed, which leads to the equilibrium sensor 9 being triggered. The signal from it is fed to the drive 2 of the conveyor belt 1. The speed of the conveyor belt decreases, and therefore the volumetric capacity of the conveyor belt 1 decreases to equalize it with the volume flow of material fed to the hopper 7. The volume of material in the hopper 7 increases and the system comes to equilibrium. With an increase in the flow of material supplied to the bunker 7, its filling increases in comparison with the flow rate of the discharge edge of the conveyor 1. Sensor 8 equilibrium gives a signal to increase the speed of the conveyor belt 1, as a result of which the filling of the bunker reaches a predetermined volume and the system equilibrium is restored.

Thus, the volumetric flow rate of the bulk material flow R is a function of the speed / l of the belt conveyor 1 fixed by the tachogenerator 3 of the drive 2.

Pv (B, I) Ul, where B h is a constant.

The proposed device makes it possible to measure the volumetric flow rate of the bulk material during its production with varying process parameters, for example, in the production of expanded clay gravel, when the degree of expansion of the granules and, accordingly, the volume capacity of the processing line changes over time. In combination with the use of a well-known mass flow meter, the application of the proposed device will allow continuous monitoring of the bulk weight of the material produced and ensure its separate storage without mixing different brands, as well as managing the process and ensuring high quality products. In addition, accounting is provided for output by shifts, which is important when working with self-supporting teams.

Claims (1)

Apparatus of the Invention A device for measuring a continuous volumetric flow rate of a bulk material comprising a motorized belt conveyor mounted on a pivot bearing located above a loading section of a belt conveyor with a discharge slot and a mechanism for controlling and measuring the flow rate that is different in order to increase efficiency by measuring flow of bulk material with a variable volume mass, in it the mechanism for controlling and measuring the flow is made in the form of a tachogenerator associated with a lead the house of the conveyor belt, which is made adjustable, two equilibrium sensors of the belt conveyor, fixed at its ends and connected to the tachogenerator; the bunker is made without a bottom, and the unloading slit is with a constant cross section, the hinge support is located between the discharge gap and the descent section of the material belt conveyor on the axis of the geometric center of the sheet of the bulk material. 7 -.G.-- U; - :; .Li7 Fie.2