SU1656330A1 - Bulk material flowmeter - Google Patents

Abstract

The invention relates to a technique for measuring the flow of bulk materials, such as seeds, and can be used in agriculture. The aim of the invention is to improve the accuracy in a wide range of measured costs. The bulk material through the neck 3 in the reservoir 1 enters the rotating disk 4 and discharges from it in a uniform flow. A certain part of the flow passes through the gap between the upper edges of the plates 8, is cut off from the main material flow and passes through the guide element 13 to the sensing element 14, which measures the flow rate of the cut-off part of the flow. The value of the measured part of the flow is regulated by the gap between the upper edges of the plates 8. 1 zp f-ly, 2 ill.

Description

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The invention relates to a technique for measuring the flow of bulk materials, such as seeds, and can be used in different parts of the national economy, in particular in agriculture in seed dressings.

The purpose of the invention is to improve the accuracy in a wide range of measured costs.

Figure 1 presents the flow meter bulk materials, a longitudinal section; figure 2 - section aa in figure 1.

The flow meter includes a housing 1 with an upper lid 2, in which a receiving neck 3 is installed. Inside the housing 1, a rotating disk 4 mounted on the drive shaft 5 of the engine 6 is located coaxially with it. Under the disk 4 there is a cut-off part 7 installed in the form of two rectangular Plates 8, rotatably mounted on two horizontal axes x 9, the ends of which are on one side led outwards and are equipped with arrows 10 located above the graduated scale 11 mounted on the body 1. Axes 9 are equidistant from the vertical axis of the flow meter. The rectangular plates 8 are hingedly connected to the gap regulator 12, made in the form of two screw pairs, between the upper edges of the plates 8. The cut-off part 7 of the flow is equipped with a guiding element 13 located below it of the cut-off flow part. Directly beneath it is a sensing element 14, which is a swinging bucket 16 fixed on an axis 15, divided by a partition 17 into two equal halves 18. An axis 15 mounted on bearings 19 in the walls of housing 1 is connected to a sensor 20 associated with an indicator device 21. The extreme position of the bucket 16 is limited to the stop 22. The housing 1 of the flow meter in the lower part is provided with an outlet 23.

Flowmeter bulk materials works as follows.

By turning on the engine 6, the disk 4 is rotated. Thereafter, a material flows from the hopper (not shown) through the receiving neck 3 to the center of the disk 4, which, as a result of the rotation of the disk 4, leaves the periphery with a uniform flow. The material that has descended from the rotating disk 4 begins to fall down. A certain part of it passes through the gap between the upper edges of the plates 8 and is cut off from the main flow of material. The cut-off part of the flow through the device 13 is directed to the sensing element 14, filling the first of the two halves 18 of the bucket 16. When the tipping mass reaches the filled material, the bucket 16 tilts to the extreme position until it stops 22 and the material from the first half of the bucket 16 is poured out. At the same time, the second half of the bucket is brought to the loading position. In the following, the cycle repeats. Bucket tipping frequency 16,

0, depending on the speed of filling the halves 18, is detected by the sensor 20, which produces and sends corresponding signals to the indicator device 21. which turns these signals into a digital expression.

The adjustment of the part of the material that is cut off and delivered to the perceptive element 14 depends on the amount of controlled flow. With a small value

0 controlled flow gap between the upper edges of the plates 8 increase. To do this, using the device 12, the plate 8 of the shutter 7 is retracted in the direction from the vertical axis of the flow meter.

5 of the installation of the plates 8 with respect to the vertical axis are recorded by the indications of arrows 10 on the scale 11. With a large amount of sweat, by removing the plates 8 in the opposite direction, the gap between

0, the upper edges of the plates 8 are reduced, i.e. eliminate overload or insufficient loading of the sensing element

Knowing the oscillation frequency of the bucket, the tilting mass of the material, and the deflection angle 5 of the cutter plates, determine the total flow of material passing through the flow meter using the formula

 -180 °

u a

0 where q is the cutoff flow rate

flow parts;

a is the central angle characterizing the distance between the upper edges of the plates.

The device allows, by means of a regulated supply of a part of the material flow to the sensing element, to ensure the normal operation of the sensing element, preventing its overload at high productivities and insufficient loading at low productivities. As a result, the accuracy of control of material flow is improved in a wide range of measured flow rates 5.

Claims (2)

1. Flowmeter bulk materials, comprising a housing with a receiving neck, under which consistently installed five rotating disk and perceiving element of material flow. distinguished by the fact that, in order to increase accuracy in a wide range of measurable flow rates, an adjustable part-flow cut-off device with a guide element is installed between the rotating disk and perceiving element. Aa 2. The flow meter according to claim 1, that is, so that the cut-off part of the flow is made in the form of two plates, the lower edges of which are rotatably fixed on the axes, and the plates are connected to the clearance regulator between them upper edges. FIG. Z