FX3-8封閉式試樣自動縮分器是為地質、煤炭、建筑、冶金等系統的科研單位實驗室，以及高等院校作試樣自動分樣的新型縮分裝置。

FX3-8 is a new type of enclosed automatic sample splitting device for scientific research laboratories in geology, coal, construction and metallurgy systems and for institutions of higher learning.

二、結構及工作原理簡介

FX3-8封閉試樣自動縮分器結構圖
Configuration of FX3-8 enclosed auto sample splitting device

該機由盛料斗、電磁振動給料器、分樣裝置，以及接樣瓶五個部分組成。

盛料斗為一錐形結構，所分析的礦樣可以一次性的倒入料斗中，起到儲存礦樣作用。

電磁振動給料器：分振動源和直料槽兩部分，利用振動原理將盛料斗流下的礦樣均勻地散步在直料槽中，不同的重要顆粒都能均勻地分布在不同的表層上，并逐步流向槽口而進入分樣漏斗。該部分只有微小的振動，沒有強烈的攪拌、撞擊、摩擦等現象，結構簡單，自動化程度高，且不需潤滑，動力消耗小。

分樣裝置：是一種旋轉結構，其箱內裝有一臺電動機，通過蝸桿蝸輪傳動，達到減速，以一種固定的速度帶動回轉支管旋轉，與回轉支管相連接的分樣盤（用緊定螺旋釘緊固）也同時轉動。分樣盤盤的八個等分錐孔先后截取從漏斗中流下的礦樣，錐孔軸心和漏斗孔軸心相吻合，由于轉動速度較快，在開始和停止截料時，各孔中的礦樣重量誤差很小，每一個錐孔下端都固定一個直管道，礦樣就從管道進入接樣瓶內。

接樣瓶：接樣瓶與固定在直管端部的接頭相連接，并同時與回轉支管一道轉動，每個管子都連接一個樣瓶，每次需上八個瓶子，每個瓶子里的礦樣重量，即為縮分礦樣總重量的八分之一，若將對角上的兩個瓶子里的礦樣合在一起，其重量即為總重量的四分之一，以此類推，兩個四分之一的礦樣合在一起，其重量即為總重量的二分之一。因此，每次縮分即可達到1~3級（1/8,1/4和1/2）縮分目的。

This device is composed of hopper, electromagnetic vibratory feeder, splitting device and collection bottle.

Hopper is a conical structure. All ore samples could be put into the hopper for storage.

Electromagnetic vibratory feeder is composed of vibration source and straight channel, distributing the ore sample from hopper evenly in the channel through vibration. In this way, different significant particles may be evenly distributed on different surfaces and move to channel opening gradually and then enter the splitting hopper. There is only micro vibration but no fierce stirring, impact and friction etc. occurs at this section which features simple structure, high degree of automation, no lubrication demand and low power consumption.

Splitting device is a rotating mechanism with a motor in the box which is designed to reduce the speed through worm and worm wheel and drive the revolution tube to rotate at fixed speed. The splitting tray (fixed through set screws) connected to revolution tube rotates at the same time. The eight division taper holes of splitting tray pick up the sample ore from the hopper in succession. The taper hole axis is aligned to hopper hole axis. Thanks to the high rotation speed, the weight error of sample ore in each hole is extremely small when the sample pick-up is started and stopped. At the lower part of each taper hole is a straight tube, through which the sample ore moves into sample collection bottle.

ample collection bottle is connected to the joint fixed at the end of straight tube and moves along with the revolution tube. Each short pipe is connected to a bottle. Eight bottles are connected at the same time, and each bottle collects sample ore of the same weight, i.e. 1/8 of total weight of sample being splitted. By mixing the sample ore in the two bottles on the same diagonal line, the weight will become 1/4 of total weight. Similarly, the weight of sample ore will reach 1/2 of the total weight by mixing the two samples that respectively account for 1/4 of total weight. Hence, the splitting grade is grade 1-3 (1/8, 1/4 and 1/2).