<section class="_135editor" data-role="paragraph" style="font-size: medium; max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; font-size: 14px; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp; &nbsp; (三)杂质检验方法<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 棉纤维杂质检验,有扫描法、机械法和估验法三种。目前,我国在棉纤维交接中,通常采用仪器检验;基层收购采用估验,但估验结果必须经常与机检结果相对照。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 1.估验法<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 杂质估验是用手摸眼看的一种传统的、简便易行的感官检验法,收购棉花时在没有原棉杂质分析机的情况下,可以估验。为使估验杂质结果准确,应经常对不同品级棉样的含杂情况进行试验分析,估验结果应经常与机检结果对照。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 2.机检法<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; (1)杂质分析机工作原理:原棉杂质分析机根据机械空气动力学原理设计。经刺辊锯齿分梳松散后的纤维及粘附杂质,在机械和气流的作用下,由于纤维和杂质的形状不同、质量不同,作用其上的力也不同,以至二者能相互分离。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; (2)试样:取样份数和方法按GB1103—1999的规定或有关方面商定的办法进行。取样数量如下:<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ①逐批取出实验样品。当批量在50包以下时,重量为300g;批量在50～400包时,重量为600g;批量在400包以上时,重量为800g。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ②从实验室样品中,用四分法取出有代表性的试验试样。批量在50包以下时,称取两个50g的试验试样和一个50g的备用实验试样;批量在50～400包时,称取两个100g的试验试样和一个100g的备用实验试样;批量在400包以上时,称取三个100g的试验试样和一个100g的备用实验试样。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; (3)试验步骤:<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ①开机前,先开照明灯并将风扇活门全部开启,空转1～2min,然后停机清洁杂质箱、净棉箱、给棉台和刺辊。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ②按上述取样数量用台秤称取实验室样品,称准至5g。用天平称取试验试样,称准至0.1g,记录质量为S。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ③将试验试样撕松,陆续平整均匀地铺于给棉台上。遇有棉子、子棉及其他粗大杂质应随时拣出,并在原棉含杂率报告单上注明。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ④开机运转正常后,以两手手指微屈靠近给棉罗拉,把试验试样喂入给棉罗拉与给棉台之间,待棉纤维出现在尘笼或集棉网板表面时,将余样陆续源源喂入,直到整个试验试样分析完毕,取出第一次分析后的全部净棉。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ⑤将取出的第一次分析的净棉,纵向平铺于给棉台上,按第一次分析步骤做第二次分析,然后取出全部净棉。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ⑥关机收集杂质盘内的杂质。注意收集杂质箱四周壁上、横档上、给棉台上的全部细小杂质。如杂质盘内落有小棉团、索丝、游离纤维,应将附在表面的杂质抖落后拣出。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ⑦将收集的杂质与拣出的粗大杂质分别称量,用天平称准至0.01g,记录重量为F与C。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ⑧按上述试验步骤分析其余的一个或两个试验试样,注意从称试验试样重量到称杂质重量这段时间内,室内温湿度应保持相对稳定。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; (4)试验结果:含杂率按下式计算。</span></p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; font-size: 14px; text-align: center; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="http://dayaotex-img.gz.bcebos.com/article/fffspic/gongsi005.png" _src="http://dayaotex-img.gz.bcebos.com/article/fffspic/gongsi005.png" data-ratio="0.33962264150943394" data-w="212" style="max-inline-size: 100%; margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; outline: none 0px !important; height: auto !important;"></p><section align="left" style="max-inline-size: 100%; margin: 0px; padding: 0px; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 14px; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;</span></p></section><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; font-size: 14px; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; font-size: 14px; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 式中:I———含杂率;<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; S———试验试样重量,g;<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; F———分析出的杂质重量,g;<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; C———拣出的粗大杂质的重量,g。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 以各试验试样的算术平均值作为该样品的含杂率,含杂率值修约至1位小数。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; (5)注意事项:<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ①每次开车时,在最初几秒中须握开关,等待觉察无特殊声音时,方可放手,如运转不正常,立即停车,加以检查。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ②开车时须先开电动机,而后开给棉罗拉,停车时应先关给棉罗拉,再关电动机。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ③随时注意拣净棉样中的棉子、子棉及其他较大杂质物,给棉台上不得放置任何物品,以免被给棉罗拉带入,损坏机件。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ④刺辊或流线板附着纤维时,须完全停车后用手握皮带将刺辊向反方向回转,用铜丝刷或镊子取下。在刺辊未完全停止运转时,切勿用手、刷子及其他工具清除,否则容易发生工伤事故或损坏机件。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ⑤经常注意电动机及其他机件有无发热或烧焦气味,杂质分析机安装电动机时,必须有地线装置,以保安全。<br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; ⑥在第二次分析时,应避免打开分析室的玻璃门,以免气流不正常。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p></section><section class="_135editor" data-role="paragraph" id="autoparagraph" style="font-size: medium; max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; font-family: 微软雅黑, &quot;Microsoft YaHei&quot;, sans-serif; font-size: 17px; caret-color: rgb(255, 0, 0); overflow-wrap: break-word !important; outline: none 0px !important;"></p></section>