JPS59204722A - Flowmeter - Google Patents

Abstract

PURPOSE:To improve a hopper scale used as a flowmeter and to obtain the user friendly flowmeter, by arranging scale hoppers one by one at the upper and lower positions, and mounting the hoppers on a measuring machine as a unitary structure. CONSTITUTION:Scale hoppers 1 and 2 are connected by frames 3, 4 and 5 so as to form a unitary structure and mounted on load cells 6, 7 and 8. A processing device for powder 12 is provided at the intermediate part between the hoppers 1 and 2 and used to obtain the result of the processing. For example, a load W0, which is applied to the load cells 6, 7 and 8 when the device is empty, is measured and memorized. Then the powder 12 is put in the hopper 1, and a load W1 is measured and memorized. A gate 15 is opened by an air cylinder 13, and the powder 12 is put in a sieve 17. The powder 12, which is coarser than the classifying point of the sieve 17, is discharged from a discharge port 18. The powder, 12, which is finer than the classifying point, is discharged to the scale hopper 2. A load W2 is measured and memorized. Operation is performed by a control device, and particle-size distribution can be automatically obtained in an online mode.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a hopper scale used as a flow meter and its application.

FIG. 1 shows a specific example thereof. Normally, a hopper scale is composed of one scale hopper, but the fundamental difference in FIG. 1 is that it is composed of two scale hoppers 1 and 2 located above and below.

The scale hoppers 1 and 2 are connected in reverse by frames 6.4 and 5 to form an integral structure. Furthermore, the frames 6.4 and 5 are mounted on load cells 6.7 and 8, respectively. Load cells 6.7 and 8 are also fixed on fixed platen plates 1-9, 10 and 11, respectively. Therefore, the object to be measured, for example, powder 12, is placed in the scale hopper 1.
It is clear that the amount of powder 12 charged into the scale hopper 1 is accurately measured by the load cells 6.7 and 8. In this case, the weight of the scale hopper 1 when it is empty needs to be measured in advance and stored in the control device.

The scale hopper is equipped with air cylinders 16 and 14, respectively, and is operated by an electric signal from the outside.
and 16 will be opened and closed, respectively.

After the powder 12 charged into the scale hopper 1 has been weighed, the air cylinder 13 opens the gate 15, and the powder 12 is discharged into the scale hopper 2 at the bottom.

Similarly, the weight of the powder 12 in the scale hopper 2 will be accurately measured by the load cells 6.7 and 8.

Here, if some kind of processing device for the powder 12 is installed between the scale hoppers 1 and 2, it will be extremely convenient if the processing device is used to obtain the results of multiple treatments.

For example, FIG. 2 shows an example in which a 1/C sieve 17 is installed between scale hoppers 1 and 2. The driving source 19 of this sieve 17 is
For example, morph. This makes it possible to measure the particle size of the powder. First, the loads Wo applied to the load cells 6.7 and 8 are measured and stored in a state where no powder 12 is introduced into this device. Next, the powder 12 is sampled during a crushing process, for example, and an appropriate amount is put into the scale hopper 1. At that time, the load W1 applied to the load cells 6, 7 and 8 is measured and stored.

Then, the gate 15 is opened by the action of the air cylinder 160, and the powder 12 in the Hescale hopper 1 is charged into the sieve 17. At this point, the sieve 17 begins to operate. As a result, the powder 12 coarser than the classification point of the sieve 17 is discharged from the discharge port 18, and the powder 12 finer than the classification point is discharged to the scale hopper 2. Here, the loads W2 applied on the load cells 6.7 and 8 are measured and stored. If the control device performs the following calculation, the particle size distribution can be easily and automatically determined online.

That is, sampling amount = Wl-Wo = under-sieve amount of A powder 12 - W2- Wo = upper-sieve amount of B powder 12 - Wl-'
W2 = For example, the sieving rate of powder 12 C/
If A is higher than a predetermined value, the operator of the crushing process will have to adjust the crusher.

In this case, it is also possible to discharge the sieve to the scale hopper 2. In addition, when the scale hopper 2 is emptied, the load W6 applied to the load cells 6.7 and 8-H is measured.
If used as a replacement, the amount of powder 12 attached to scale hoppers 1 and 2, etc. will be taken into consideration.

In addition, in FIG. 2, if several sieves with various classification points are prepared in place of the sieve 17 and are selectively installed between the scale hopper 1 and the scale hopper 2, each sampling It is possible to find the upper or lower sieve of different classification points every time.1. It becomes possible to automatically measure a more detailed particle size distribution online.

Therefore, the benefits obtained are called dogs.

Figure 6 shows an example of this application to a moisture meter.

In this case as well, as in Fig. 2, first, the weight WO with both scale hoppers 1 and 2 being empty is
Find it by Then, the sample is sampled in the process and put into the scale hopper 1. Load cell at that time 6.7
And the weight W1 determined by 8, Wl-Wo-sampling amount, the sampling amount.

Next, the entire amount of the sample in the scale hopper 1 is put into the drying tank 20. A large number of infrared rays 21 are provided in the drying tank 20, which are turned on when a sample is introduced, and the water in the sample starts to evaporate. Then, after a predetermined period of time has passed, the bottom of the drying tank opens and the sample is transferred to the scale hopper 2.
Pour the entire amount into At the same time, the infrared lamp 21 is turned off.

These operations can be easily performed by the control device in the control surface 22.

Here, the weight W2 of load cells 6.7 and 8 is
By calculating, the water content can be calculated as shown below.

In this way, a moisture meter for online use can be constructed with extremely simple structure.

On the other hand, it goes without saying that this scale hopper may have a structure in which the powder inside can be discharged by reversing it.

In this way, various applied devices can be easily constructed.

[Brief explanation of the drawing]

1, 2, and 6 show application examples of the present invention, and detailed symbols are as follows. 1 scale hopper 2 scale hopper 6 frames
4 frame 5 frame 60-docel 70-docel 80-docel 9 fixing bracket 10 fixing bracket 11 fixing bracket 12 powder 13 air cylinder 14 air cylinder 15 gate
16 Gate 17 Sieve 18 Discharge port 19 Drive source 20 Drying tank 21 Infrared lamp 22 Control box 7E 7 1. q :q

Claims (1)

[Scope of Claims] 1. Scale hoppers capable of automatically discharging internal substances are arranged one each on the upper and lower sides, and these are made into an integral structure with a frame, and this integral structure is placed on top of the weighing machine. A weight scale that features a structure that allows it to be placed on top. 2. The particle size distribution measuring device according to claim 1, characterized in that a classifier is installed between upper and lower scale hoppers, and the coarse powder or fine powder after classification is discharged to the lower scale hopper. 6. The moisture meter according to claim 1, characterized in that a drying tank is installed between the upper and lower scale hoppers, and the substances inside the drying tank are discharged to the lower scale hopper.