自動(dòng)化真空上料機(jī)主要用于輸送粉末和顆粒狀的物料，例如原料藥粉末，化工粉料，金屬氧化物粉末，炸藥粉末；膠囊，片劑，丸劑，小食品顆粒，炸藥顆粒等；不適合輸送過(guò)于潮濕的、粘的、過(guò)重的物料。

　　Automated vacuum feeders are mainly used for conveying powders and granular materials, such as raw material powders, chemical powders, metal oxide powders, and explosive powders; Capsules, tablets, pills, small food particles, explosive particles, etc; Not suitable for conveying excessively damp, sticky, and heavy materials.

　　不是任何物料都能夠采用真空上料機(jī)的，判定物料的可輸送性，需要通過(guò)測(cè)量分析物料的一些特性參數(shù)得出。特性參數(shù)包括：堆積角、堆積密度、顆粒因素、靜電常數(shù)、潮濕靈敏度、爆炸風(fēng)險(xiǎn)、毒害性和腐蝕性。

　　Not all materials can be transported using a vacuum feeder. To determine the transportability of materials, it is necessary to measure and analyze some characteristic parameters of the materials. Characteristic parameters include: stacking angle, stacking density, particle factor, electrostatic constant, moisture sensitivity, explosion risk, toxicity, and corrosiveness.

　　(1)堆積密度堆積密度是指物料松散狀態(tài)下單位體積的重量。由于顆?；蚍勰┌锪虾涂諝?，所以堆積密度會(huì)根據(jù)不同的堆放形式而改變，因此必須測(cè)量實(shí)際狀態(tài)下的堆積密度。

　　(1) Bulk density refers to the weight per unit volume of a material in a loose state. Due to the presence of materials and air in particles or powders, the bulk density may vary depending on the stacking form, therefore it is necessary to measure the bulk density in its actual state.

　　(2)堆積角當(dāng)判斷一種物料的可輸送性時(shí)，物料的流動(dòng)性是重要的參數(shù)。通常采用堆積角來(lái)表示，即物料從一定高度傾倒下來(lái)靜止后所形成的圓錐體的錐面與水平面的夾角。角度越小即流動(dòng)性越好，反之亦然。但是，對(duì)于某些特殊物料，堆積角并不能準(zhǔn)確表示流動(dòng)性的優(yōu)劣。

　　(2) The stacking angle is an important parameter when determining the transportability of a material, and the flowability of the material is crucial. The stacking angle is usually used to represent the angle between the cone surface formed by the material falling from a certain height and the horizontal plane. The smaller the angle, the better the liquidity, and vice versa. However, for certain special materials, the stacking angle cannot accurately indicate the quality of fluidity.

　　(3)顆粒因素顆粒的重量、粒度分布形態(tài)、形狀、硬度是影響物料流動(dòng)性和輸送系統(tǒng)設(shè)計(jì)的關(guān)鍵因素。

　　(3) The weight, particle size distribution, shape, and hardness of particles are key factors affecting material flowability and conveying system design.

　　(4)潮濕靈敏度所有物料都有吸潮特性，對(duì)潮濕敏感的物料有町能因?yàn)槲苯Y(jié)塊而改變流動(dòng)性，甚至?xí)辰Y(jié)管壁或過(guò)濾器表面，出現(xiàn)堵管或堵塞過(guò)濾器的現(xiàn)象。

　　(4) Moisture sensitivity: All materials have moisture absorption characteristics. For moisture sensitive materials, their flowability may change due to moisture absorption and agglomeration, and they may even adhere to the pipe wall or filter surface, resulting in blockage of the pipe or filter.

　　(5)爆炸風(fēng)險(xiǎn)當(dāng)微細(xì)顆粒和空氣混合，達(dá)到臨界濃度時(shí)，一旦出現(xiàn)火花，將有可能發(fā)生爆炸。粉塵爆炸有3個(gè)必要條件：氧氣、臨界濃度、火花。輸送時(shí)物料的濃度難以控制，可以控制的是氧氣和火花。采用惰性氣體保護(hù)隔離氧氣，通過(guò)消除靜電避免火花的產(chǎn)生，這樣可以控制爆炸的風(fēng)險(xiǎn)。

　　(5) Explosion risk: When fine particles mix with air and reach a critical concentration, there is a possibility of explosion once sparks appear. There are three necessary conditions for dust explosion: oxygen, critical concentration, and spark. The concentration of materials during transportation is difficult to control, and only oxygen and sparks can be controlled. By using inert gas protection to isolate oxygen and eliminating static electricity to avoid sparks, the risk of explosion can be controlled.

　　(6)毒害性具有毒害性的粉體泄露會(huì)造成環(huán)境污染和人員傷害，輸送時(shí)必須采用可靠的技術(shù)和設(shè)備加以避免。真空上料機(jī)是安全的選擇，因?yàn)檩斔拖到y(tǒng)內(nèi)部的壓力低于大氣壓力，不會(huì)出現(xiàn)泄露現(xiàn)象。另外從輸送系統(tǒng)中排除的氣體必須經(jīng)過(guò)合理的無(wú)害處理，達(dá)標(biāo)排放。

　　(6) Toxic powder leakage can cause environmental pollution and personal injury, and reliable technology and equipment must be used to avoid it during transportation. A vacuum feeder is a safe choice because the pressure inside the conveying system is lower than atmospheric pressure, and there will be no leakage. In addition, the gas discharged from the conveying system must undergo reasonable harmless treatment and meet emission standards.

　　(7)腐蝕性有些粉體具有很強(qiáng)的腐蝕性，需要選擇合適的材料制造真空上料機(jī)。

　　(7) Some powders have strong corrosiveness, and it is necessary to choose suitable materials to manufacture vacuum feeders.

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