JPH0425482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a vertical two-layer online moisture meter.

(Prior Art) Conventionally, there has been no two-layer online type moisture meter of this type. Conventionally, even in a classifier that is not a moisture meter but has a similar configuration, when it is formed in two stages, one weighing scale belongs to the upper hopper and another weighing scale belongs to the lower hopper. (Japanese Unexamined Patent Publication No. 116446/1983). In order to perform accurate weighing, both weighing scales had to be calibrated and finely adjusted, and in addition, the structure was complex and required extra space.

(Problem to be solved by the invention) The present invention aims to create a vertical two-tank online moisture analyzer that is capable of online measuring the weight of one sample before and after drying, by installing two tanks vertically in a common frame. Take it as a challenge.

(Means for Solving the Problems) The problems of the present invention are solved by the structure described in claim 1.

(Example) FIGS. 1 and 2 show an example of a vertical two-tank online moisture meter according to the present invention. Normally, a single dry moisture analyzer is an off-line type, in which a sample is manually input into the moisture analyzer, and after drying, it is manually removed. However, in the present invention, the moisture meter is of an online type, and sample loading, drying, and discharge are performed fully automatically. That is, the moisture meter according to the present invention includes two upper and lower hoppers 1 and 2 that are mounted on a common machine frame. The upper hopper 1 is connected via frames 3, 4 and 5 to a common machine frame. Furthermore, frames 3, 4 and 5 are mounted on load cells 6, 7 and 8, respectively, on the machine frame. The load cells 6, 7 and 8 are also fixed on fixed brackets 9, 10 and 11, respectively, forming a weighing machine.

The substance to be measured, for example, powder 12, is placed in the hopper 1.
is loaded, its weight is transferred to load cells 6 and 7.
and 8 with a single weighing machine. In this case, the weight of the empty hopper 1 must be measured in advance and stored in the control device. Pneumatic cylinders 13 and 14 are respectively installed in the hopper, and the pneumatic cylinders open and close gates 15 and 16, respectively, in response to electrical signals from an external control device. After the weight of the powder 12 charged into the upper hopper 1 has been measured, the powder is discharged into the lower hopper 2 through the gate 15 opened by the pneumatic cylinder 13. Similarly, the weight of the powder 12 in the lower hopper 2 can be accurately measured by the load cells 6, 7, and 8 separately from the measurement of the weight of the powder in the hopper 1. It goes without saying that the hoppers 1 and 2 may have a structure in which the powder inside can be discharged by reversing them.

Moisture measurement is performed as follows. The weight W ₀ when both hoppers 1 and 2 are empty is determined by load cells 6, 7, and 8. Next, a sample is taken from the process operation and put into the upper hopper 1. At that time, from the weight _W1 determined by one weighing machine formed by the load cells 6, 7, and 8, W1 _{- W0} =sampling amount is determined.

Then, the entire amount of the sample in the upper hopper 1 is put into the drying tank 20. The drying tank 20 is equipped with a large number of infrared lamps 21, which are turned on when a sample is added to start evaporation of water in the sample. Then, after a predetermined period of time has elapsed, the lower part of the drying tank is opened and the entire sample is dropped into the hopper 2 below. At the same time, the infrared lamp 21 is turned off. These operations can be easily performed using the control device in the control panel 22.

Here, if the weight W ₂ is determined by one weighing machine formed by the load cells 6, 7, and 8, the moisture content can be determined as follows using an online calculation device (not shown).

(W ₁ −W ₀ )−(W ₂ −W ₀ )/W ₁ −W ₀ = Moisture content Online measurement of sample moisture can be performed using the vertical two-tank online moisture analyzer configured as above. can. Therefore, such a vertical two-tank online moisture meter can be incorporated into a powder production line.

[Brief explanation of drawings]

FIG. 1 is a partially cross-sectional front view of a vertical two-tank online moisture meter according to the present invention, and FIG. 2 is a cross-sectional view taken from FIG. 1. Symbols in the figure: 1... upper hopper, 2... lower hopper, 17... classifier.

Claims (1)

[Claims] 1 Hoppers 1 and 2, which can automatically discharge internal substances, are arranged in series, one each on the top and bottom, and these are integrated into a frame, and a load cell for weight measurement is built into this integrated structure. The weight of the substance in the upper and lower hoppers 1 and 2 can be measured separately using a single weighing machine. , a drying tank 20 between
This is a vertical two-tank online moisture meter, characterized in that the internal substances are discharged into the hopper 2 at the bottom through a drying tank.