JPS5824834A - Constant quantity reduction method in sample regulating apparatus - Google Patents

Abstract

PURPOSE:To make the total pickup quantity accurate in a simple constitution, by directly combining a forced feeder and a weighing machine, and performing the pickup with the pickup quantity for each time being directly weighed. CONSTITUTION:The weighing machine 1, wherein the bottom constitutes a feeder trough 4, weighes a first sample 3. The weight signal is inputted to an operator 11 from a load cell through a weighing machine control device 9. Meanwhile, the pickup quantity and pickup times of a second sample is set by a setting devices 14 and 15 and inputted to the operator 11. The operator 11 computes the divided pickup quantity and discharging quantity for every time and operates a forced feeder vibrator 6 and a reducing machine 7 through a control device 10. In this way, the divided pickup quantity for every time and the discharge quantity for every time and the discharge quantity for every time are directly measured. Thus, the pickup quantity and pickup times of the second sample are matched with the specified quantity and times.

Description

[Detailed description of the invention] do.

The quantitative reduction method in existing sample preparation equipment involves weighing the 7th sample once, dropping it onto a conveyor, installing a weir plate in the middle of the conveyor, and passing the 7th sample under the weir plate. From then on, set the layer thickness of the 7th sample on the conveyor and the number of times of sampling with the Zambra (assuming that the thickness of the 7th sample stacked on the conveyor and 11 sheets is constant, that is, the weight of the 7th sample loaded per unit length of the conveyor is constant). According to
(1) A method of keeping the speed of the conveyor constant and determining the amount of sample that can be collected when 5 machines operate once per cycle, and then determining the sampling interval of the reducing machine according to that, and (2) Sampling interval of the reducing machine. Two methods are used: a method in which the speed of the conveyor is determined so that the amount of sampled seven times is determined as a total force while holding the amount constant. In any case, these conventional methods are quantitatively indirect collection methods, so it cannot be said that the amount of 7 times of collection and the total amount of collection (reduction amount) match the planned amount, and it is not practical. This is causing a considerable amount of error.

The object of the present invention is to directly combine a forced feeder and a weighing machine to perform accurate quantitative reduction with a simple mechanism. In other words, the amount collected each time is directly weighed and the total amount collected (sample after reduction) is calculated.
": We aim to be accurate.

That is, in the present invention, a primary sample is weighed by a weighing machine whose bottom part constitutes a trough of a forced vibration feeder, and a second sample is weighed.
Set the yield and number of samples for the next sample using the setting device.
, Without using all the numerical calculators manually, we calculate the amount of fireflies to be collected in σ times and the amount of 4U times to be discarded, and the signal is used to operate the reduction machine and the feeder to collect and increase the number of In times to collect fireflies and turn fσ.
Discard the secondary sample by weighing the entire surface:
Takeover - A quantitative reduction method in the test peak 1 adjustment facility, which is characterized by matching the wall and the number of times of sampling to a predetermined value.

The present invention will be described in detail below with reference to preferred embodiments thereof.

As shown in the drawing, weighing machine body/and forced feeder (
ll+4) (This is a feeder that has the ability to cut 1 to 1 to 100 ml of cutting material to the feeder trough) is connected to the forced feeder by a spring, and the weighing machine body is attached to the bottom. The mechanism is such that the feeder trough forms the bottom of the weighing machine body without any cut gate etc.In the feeder track, a weir plate is installed near the outlet to connect the feeder (//
-1A), the layer thickness and width of the 7th sample 3 prepared in January 11 were kept approximately constant, and the cutting fi'f U (setting -
Fij - cutting results) ii nogy', '7. ).

The sequence of the method of the invention is as follows.

Prisoner 7th sample 3 is weighed with a scale blow/tl. Scales: Shoulder 1 琵/ rlI-l from Selco, Executive Shin 1 tsu is flo
;i't, R! 1ill 111 is transmitted to the device 9, where the signal is fully calculated for only the iF amount of the 7th sample 3 'J4/
Put it in /. The current knee f of the 7th sample from the presentation device //
t: k'? ¥411 display / , 2 VC displayed.

(B) Transmit the λ-th sample set by the secondary Xansol sampling meter setting device /S to the computing unit //.

(C), 2(7 (Sample sampling frequency setting device/Transmits the numerical value set in 17 to the computing device//.

(D) (Al, (B), ((2) (7) Each signal is used to calculate the calculation unit//pregnancy, the amount of divided sampling each time W1 of the secondary sample
Then, J, Jt and mW2 are calculated.

(E) When issuing the J11 command to start a-th sampling, 6
1 (a signal is transmitted from the calculator // to the feeder and decompressor control device IO, and the signal from this device switches the decompressor 7 to the direction P1 in which the co-order sample enters the sample surface g.

The forced feeder (<Z+X) starts and the cutting amount reaches Wl.
When it reaches, the forced feeder (ll+4) stops and the reduction machine 7 is switched to the sample discharge side P2. Next, the feeder (g+x)U is started, and when the cutting amount reaches W2, the feeder (/I→-6) is stopped at -1:2. The reduction machine is switched to the Pl side again 9, and the feeder (
+6) is started, and the cutout is started, and only 4 rows are entered. By repeating such an operation and collecting a set number of primary samples from the 7th sample 3, it is possible to match the set sampling amount.

(1”) The accumulated amount of secondary samples collected is displayed on the display 13.

[Brief explanation of the drawing]

The drawing is a diagram of a preferred/implementation device for the method of the invention. ／・Acceptance 0 machine body, Ω・load cell for weighing machine, 3・
・／θ(Zanfu"le, gu... Feeder trough for Yuushun ifl, S... Weir plate, 4... Forced) Zu-Goo vibration exciter, 7.
・Reducing machine, g... Trial license 1 collection box, 9... Weighing machine control device, 10... Forced feeder and reducing device control device, /
/...Arithmetic unit, /2...Weight display device, /3...Ω-th sample collection: and totalization display, /ll...-next sample collection count setting device, /! i...λ-order sample collection amount setting device.

Claims (1)

[Claims] The 7th sample is weighed using a weighing machine whose bottom forms a trough of a forced vibration feeder, the amount of the 2nd sample to be taken and the number of times of sampling are set using a setting device, and these values are entered manually into a calculator each time. By calculating the divided sampling amount and the discarded amount each time, and operating the fractionator and feeder based on the signal, directly weighing the divided sampling amount and the discarded amount each time.
A quantitative reduction method in sample preparation equipment, characterized in that the amount of next sample to be taken and the number of times of sampling are made to match predetermined amounts and numerical values.