SU1004850A1 - Loose material humidity measuring device - Google Patents

Description

The invention relates to a measurement technique, in particular, to devices for measuring the moisture content of solid materials, such as peat briquettes, and can be used to measure any compressed solid materials in a stream.

A device for measuring the moisture content of bulk materials transported by a conveyor belt, containing a base fixed at one end over a transported material with electrodes placed on it and a load til, is known. A disadvantage of the known device is the low measurement accuracy due to the fact that the dielectric base and fixing the electrodes directly in contact with the test material, which leads to a decrease in the sensitivity of the device due to the layer material in an induced electric field.

The closest in technical essence and the achieved effect to the proposed is a device for measuring the moisture content of bulk materials, containing two electrodes, one

of which are the walls of the tray, and the other - an isolated bottom. The device is intended for measuring the moisture content of the bulk material in a stream without narrowing the cross section of the flow and without an external source and the current amplifier G2.

However, using the specified device to accurately measure

10 moisture solid pressed materials without processing tray is difficult. In addition, the electrodes do not have a mechanical effect on the material under study, do not clamp

15, since the narrowing of the cross section of the flow with the aim of its unimpeded passage is excluded.

The aim of the invention is to improve the accuracy with continuous measurement of the moisture content of bulk materials.

The goal is achieved by the fact that in a device for measuring the moisture content of solid materials containing two electrodes, one of which is the walls of the tray and e1) is the insulated bottom, the walls of the tray are connected by plates to form a conductive loop with the bottom, and

30 locking mechanism installed with

the gap is symmetrical between the plates of the tray.

FIG. 1 shows a device for measuring the moisture content of bulk materials; general view; in fig. 2 -. section aa in fig. 1; in fig. 3 node connecting dielectric plate with the casing.

A device for measuring the moisture content of solid materials includes a flat movable electrode 1, made in the form of a ski and mounted on a plate of dielectric 2 (Fig. 1) using studs 3 1. Fig. .2), the conductive guide lot. 4, which is a ground-type electrodome (Fig. U, consisting of walls 5 (Fig. 2), bottom 6, plate 7, mounted on the inside of the walls and facing inward of the tray , copying the profile of a controlled material (briquette tape) 8, a fixation mechanism. And a clamp 9 consisting of four columns 10, fixed on a tray using plates 11, gussets 12 and strips 13, upper base 14, mounted on the columns with adjustable compression force springs 15 with gaskets 16.

A high-frequency block 17, mounted on a dielectric plate- 2, mounted on columns with a gap of 2. on guide bushes 18, is connected to the flat electrode 1 by means of a high-frequency cable 19, is closed by a 2Oi casing and is connected to switching and recording units ( .

A moisture measuring device is mounted directly on a stamp press and operates as follows.

Briquetting tape 8 of variable thickness coming out of the under-press press moves along the guide conduit tray 4 and closely contacts the moving electrode 1, which is fixed on the dielectric plate 2 connected to the fixation and clamping mechanism 9. The flat moving electrode 1 has the possibility of vertical movement with a certain imbalance due to the gap 2 in the directions of the sleeves 18. This allows the movable electrode to copy the surface of the briquette tape in the longitudinal and transverse directions at the end act. The conductive guide tray 4, which is the second ground electrode, stabilizes the movement of the briquette tape in the area of the primary converter of the measuring device and copy surface

tape 8, generates an electrical signal proportional to the integral value of its humidity.

When the humidity of the briquette tape changes, its dielectric DEFINABILITY changes, which in turn leads to a change in the capacitance of the primary converter, and this leads to an imbalance of the diode-capacitive bridge (not shown) and the corresponding equivalent moisture of the material, a change in the output signal on the recording unit (not shown).

The fixation and clamping mechanism, made in the form of die-cutters, with a spring-loaded plate mounted on them. On the slug bushings, provides a constant, tight and direct contact of the moving in the vertical plane of the electrode with the surface of the material being measured. In the process of movement of the briquette tape, this mechanism dampens its vibration and fixes the movable electrode in the space between the plates of the guide, conducting tray, which is the second fixed electrode.

The use of the proposed device intended for continuous measurement of the moisture of a moving solid briquette tape at briquette factories with any presses allows to increase the accuracy of moisture measurement and to maintain optimally the process of drying the raw material, to increase the productivity of peat briquette factories and the quality of products.

Formula ,, invention

A device for measuring the moisture content of bulk materials, containing two electrodes, one of which serves the walls of the tray, and the other an isolated bottom, characterized in that in order to improve accuracy in continuous measurement of the moisture content of bulk materials, the walls of the tray are connected by plates, forming the bottom , the author of the electrode, equipped with a mechanism of fixation, is installed with a gap symmetrically between the plates.

Sources of information taken into account in the examination

1. USSR author's certificate №, cl. G 01 N 27/22, 1979.

2. Authors certificate of USSR 173991, cl. G 01 N 27/22, 1962

(prototype).

Claims (1)

Claim A device for measuring wet bulk materials containing