监控系统井下分站后备电源远程放电技术研究

本文介绍了同煤集团塔山煤矿使用的型号为KDW660/24BJ的监控系统供电电源后备电池远程放电技术。通过研究该电源电路结构及工作原理,经技术研究改造,实现了地面机房值机人员远程维护井下监控系统分站后备电池,延长了监控系统井下分站后备电池的使用寿命,经济效益显著。更重要的是通过提高监控系统设备供电稳定性,一定程度上提升了矿井监控系统运行的可靠性和稳定性。     

后备电源远程冷态放电装置在常村煤矿的应用

为满足《煤矿安全规程》中直流供电不低于2 h规定,延长监测监控、人员定位分站备用电池的使用寿命,解决人工井下现场操作,影响安全和生产,提高效率;常村煤矿研制出了矿井安全监测、人员定位系统后备电源的嵌入交换机内的嵌入式冷态处理放电装置,只需通过监控机房的监控主机向井下分站发出遥控指令,井下分站备用电池便会自动放电或结束放电。     

基于矿用本安电源管理的充控电路设计

矿用本安电源在现代煤矿监控系统中起着至关重要的作用,它是整个监控系统的动力源,是监控系统的核心之一。而本安电源中的核心部件之一充控电路板,控制着整个本安电源的镍氢电池充、放电、交直流电源的转换,并实时显示后备电池是否处于正常状态等。着重从本安电源充控电路的设计原理和实际应用进行介绍,以及Max11068对镍氢电池单体进行监控等技术,详细论述了其设计过程。     

矿用产品安全标志发证最新信息2006年12月(部分)获安全标志证书产品及企业名录

宜兴市三恒自动化仪表有限公司联系人:杨皆沈电话:0510-87060011,87065910KGU5B·2物位仪换能器;KGU5B·3物位仪显示器;KDW17·10备用电池箱;KGU5B矿用超声物位仪;KGT9-A矿用机电设备开停传感器;KGF6煤矿用收缩管风速传感器;KGT9-E矿用机电设备开停传感器;KDW17矿用隔爆兼本安电源;KDW22矿用隔爆兼本安电源;KGF2矿用风量传感器;KGW5数字式温度传感器;KGU5B·1物位仪控制箱常州市三恒自动化仪表有限公司联系人:任启洪电话:0519-5196750,5196731KGJ25煤矿用高低浓度甲烷传感器;JCB-C120瓦斯(巡更)检测仪;KTG8矿用本安数…     

基于单片机的后备电池监控管理装置的应用

为了保持后备电池的性能,延长蓄电池的使用寿命,新桥煤矿采用了后备电池监控管理装置。主要介绍了后备电池监控管理装置的工作原理和充放电功能的实现及电压、电流等重要参数采集原理等,该装置在新桥矿取得了良好的应用效果。     

矿井安全监控后备电源充放电功能在地面中心站远程控制的实现方案

监控后备电源远程充放电功能是针对井上下环境恶劣、条件复杂、点多面广、战线长、距离远的大中型煤矿监测监控设施设备安全供电的有效保障措施。文章详细介绍了如何在KJ66N煤矿安全监控系统实现安全监控后备电源远程充放电功能及其工作过程。     

基于LT6803的大容量锂离子后备电源设计

为提升大容量锂离子电池后备电源被应用于煤矿生产过程的实际效果,依据相关规定和要求,设计了基于LT6803的大容量锂离子后备电源。该后备电源采用24支60AH磷酸铁锂电池相串联,进行了专门的隔爆箱体和电气设计,电池管理系统采用两片型号为LTC6803的电池管理芯片,并采用被动均衡方式对电池组的一致性进行管理。该设计硬件及软件系统简单明了,极大提高了系统的可靠性,减少了开发设计工作量,有效提高了后备电源的使用期限,值得进一步推广应用。     

上湾煤矿井下无线通讯系统PAS研究

由于煤矿井下地面潮湿 ,电缆腐蚀严重 ,信号不好 ,有线通信装置维护困难。上湾煤矿引进PAS无线通讯系统。该系统由防爆基站控制器KTW 5、防爆基站KTW 6、防爆电源KDW 2 4和光端机KTG3等组成。实践证明PAS无线通讯系统安全、可靠 ,完全能满足井下信号的覆盖、人员定位和话务量的需求。     

矿井监测分站备用电池远程遥控放电装置的研究与应用

 摘 要：监测分站备用电池作为矿井监控设备的备用电源,其性能优劣直接关系到分站在交流供电不正常的情况下,监测分站能否正常运行,连续监测,即系统工作的可靠性问题。为保证分站备用电池的性能,延长其使用寿命,一般生产厂家要求用户每月对分站电池进行完全放电一次,而现有放电方式均是采用传统人工井下现场操作,费工费时,对矿井正常生产影响很大,且难以操作,放电效果差。针对以上问题,研制出了矿井监测分站备用电池地面远程遥控全自动放电装置,只需通过地面监控中心计算机向井下分站发出远程放电遥控指令,井下监测分站备用电池便会自动放电,放电结束又会自动恢复为交流供电。大大节省了劳动力,提高了劳动功效,减少了影响生产的时间,增加了系统工作的稳定性和可靠性,延长了蓄电池的使用寿命,确保了矿井安全监测监控系统设备安全、可靠、有序的运行。     

煤矿井下变电所后备电源配置方案的选择

煤矿井下的高压配电装置需要有可靠的电源才能可靠地切除故障,以防止开关误动或拒动。矿用网络交换机、矿用电力分站等网络监控平台设备,有了后备电源才能在异常停电时确保信息上通下达,故后备电源是煤矿井下变电所实现无人值守的必备条件;同时,不同的设备对后备电源的要求不同,因此还须考虑后备电源的可靠性和安全性。因此,通过各类设备对后备电源的要求进行分析,以及对各类后备电源的优缺点进行分析,可为煤矿井下变电所后备电源的选择提供新的思路。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。