黄金网站APP观看大全,电影理论片,国产内射老熟女aaaa∵,露脸内射熟女--69XX

微型狄法爾測定儀

DFR-2微型狄法爾測定儀

一、 儀器簡介

DFR-2型狄法爾磨耗試驗(yàn)機(jī)可以測量出石料的耐磨強(qiáng)度。對于一些石料，這種耐磨強(qiáng)度在干燥和含水的情況下是不同的。主要用于石料的磨耗率試驗(yàn)，也就是抗摩擦、抗沖擊，為鑒定集料品質(zhì)的指標(biāo)。此標(biāo)準(zhǔn)適用于歐標(biāo)、法標(biāo)NF P18-572等相關(guān)標(biāo)準(zhǔn)。

二、 主要結(jié)構(gòu)

本機(jī)主要有滾筒、密封蓋、支架、變速箱、電機(jī)、控制器等部份所組成。

三、 儀器特點(diǎn)

它包括有四個一端封口的空心圓筒，對于粒度介于 4 至14 毫米之間的粒料，圓筒內(nèi)直徑為 200±1 毫米，有效長度為154±1 毫米。圓筒為不銹鋼材質(zhì)(Z 2 CN 18-10), 厚度不小于3 毫米。它們被安裝在兩條水平軸上。每個圓筒可以用于一個試驗(yàn)。圓筒內(nèi)部不能存在任何由于焊接或固定方式引起的隆突不平。用8 毫米厚的平蓋來封閉圓筒。通過平蓋上的接縫來確保密封性。磨料由直徑為 10±0.5 毫米的不銹鋼圓形滾珠組成 Z 30 C 13。使鋼珠通過兩個間距為 9.5 毫米的平行棒，或者以10 個用過的滾珠為一組稱量其質(zhì)量，該質(zhì)量不能夠小于34 克，由此快速地檢查滾珠的直徑。一個電動機(jī)(大約1 千瓦)，它必須確保圓筒以100tr/min±5 tr/min 的速度勻速旋轉(zhuǎn)。一個在試驗(yàn)結(jié)束時可以自動中斷發(fā)動機(jī)運(yùn)轉(zhuǎn)。

四、 技術(shù)參數(shù)

1 、試桶直徑：200±1mm

2 、試桶長度：154±1mm

3 、電壓：220v

五、 使用方法

1 、量取試樣：4-14mm粒料量取500±2g。

2 、將試驗(yàn)用圓柱體開口向上放置，加入磨料，倒入量取的試樣，加入2.5L水。

3 、設(shè)定試驗(yàn)機(jī)為2小時，按啟動鍵。

4 、待試驗(yàn)機(jī)停止工作后，將集料和磨料收集到容器中，小心避免集料的丟損。細(xì)心使用洗滌瓶清洗圓柱體內(nèi)部，收集水和遺留的礦物質(zhì)。

5 、用1.6mm的濾篩清洗容器的材料，磨料將會被8mm的濾篩留住。使遺留物瀝干，并在105℃的烘箱烤干，直到總質(zhì)量穩(wěn)定。

6 、稱量干燥后的遺留物。稱量值為m’

7 、DFR-2型狄法爾磨耗試驗(yàn)機(jī)計(jì)算：

根據(jù)定義，微的瓦爾系數(shù)或為以下關(guān)系式：

這里：

M 為試驗(yàn)用試件干燥時總量（500克）；

m = M – m’為通過測試的通過1.6毫米濾篩的材料的總量。 

DFR-IIDeval Abrasion Testing Machine

1、 Brief introduction of instrument

DFR- type IIdeval machine can measure the abrasion strength of stone. For some stone materials, the wear resistance is different in the case of dry and water cut. It is mainly used for the wear rate test of stone material, that is, anti friction and impact resistance, which is the index of identifying the quality of aggregate. This standard is applicable to standards such as European standard, standard NF P18-572 and other related standards.

2、The main structure

This machine mainly consists of roller, seal cover, support, gearbox, motor, controller and so on.

3、The characteristics of the instrument

It comprises a hollow cylinder four side seal, the granularity between 4 to 14 mm pellets, cylinder diameter of 200 + 1 mm, the effective length is 154 + 1 mm. The cylinder is made of stainless steel (Z 2 CN 18-10) with a thickness of less than 3 mm. They are mounted on two horizontal axes. Each cylinder can be used for an experiment. There are no bulge irregularities caused by welding or fixing in the cylinder. Closed cylinder with 8 mm thick flat cover. The seal is secrecy by the joint on the flat cover. The abrasive consists of Z 30 C 13 stainless steel round balls with a diameter of 10 + 0.5 mm. The steel ball can be weighed through two parallel rods with 9.5 mm spacing, or the weight of the 10 balls that are used should be weighed. The quality can not be less than 34 grams, so that the diameter of the ball can be quickly checked. An electric motor (about 1 kW), which must ensure that the cylinder rotates at a speed of 100tr/min + 5 tr/min. One can automatically interrupt the engine operation at the end of the test.

4、 Technical parameters

1. The diameter of the test bucket: 200 + 1mm

2. The length of the test bucket: the length of the 4-14mm test barrel is 154 + 1mm, and the length of the 25-50mm test barrel is 400 + 2mm.

3, voltage: 220V

5、Methods of use

1. Sample sample: 4-14mm grain amount is 500 + 2G.

2, the test is placed on the cylinder, adding abrasive, into the sample and adding 2.5Lwater.

3, set the test machine for 2 hours, press the start key.

4. After the test machine stops working, collect the aggregate and abrasive in the container, and carefully avoid the loss of the aggregate. Carefully use a washing bottle to clean the inside of the cylinder and collect water and the minerals left over.

5, use 1.6mm filter screen to clean the material of the container, the abrasive will be retained by the 8mm filter screen. The remnants of the drain, and dried in the oven 105 degrees, until the total quality is stable.

6. A remnant after being weighed and dried. The weighing value is m '

7. Calculation:

According to the definition, the Wahl coefficient of the micro 

or the following relation is:

Here：

M was the total amount of drying (500g) for test specimens.

M = M - M 'is the total amount of material passed through 1.6 millimeter filter through test