提高主排水系统效率的技术研究

随着矿井开拓的延深,矿井的涌水量不断增大,且现有的排水系统使用年限长,设备排水效率低,导致矿井排水设备的运行时间长、电能消耗增大,矿井排水存在安全隐患。为提高主排水系统的排水效率,三矿对该项工作进行了技术研究。     

关于矿井多水平智能化高效排水系统改造的研究与应用

随着科学技术水平的提升,矿井排水问题也成为当下相关领域重点研究的课题之一。如何完成快速高效的排水,降低劳动力成本,以及减少因排水不及时引发的煤矿生产故障,已经成为煤矿井下作业的重要组成部分,也是煤矿向着智能化系统升级的重要组成部分。本文以株柏煤矿矿井主排水泵自动化系统改造为案例研究对象,通过对该矿井排水系统的硬件与软件部分设计,达到了应用的实际工作效果,完成了株柏煤矿矿井主排水泵自动化系统改造的要求。期待通过本次研究和对优化排水系统,引入自平衡高效排水泵,提高排水效率,以PLC控制为基础进行改造,实现4个泵房的远程监控,去除司泵工,优化用电时段,实现智能化自动控制。     

煤矿水泵与管路运行方式的节能优化措施研究

煤矿水泵是煤矿区主要的矿用设备之一,煤矿水泵和电动机、排水管路、电控设备、监控仪表等共同组成了矿井排水系统,其中,煤矿水泵和排水管道运行方式是影响煤矿井下排水系统运行效率的重要组成部分,也可以说,煤矿井下排水系统效率是由水泵和管道运行的效率共同决定的。但就现阶段来说,在煤矿井下排水系统中,存在着煤矿水泵设备落后,管道老化等问题,这些会严重的影响煤矿井下排水系统的运行效率,因此,针对这些问题,煤矿企业可以通过优化煤矿水泵和管道运行方式,降低排水电耗,实现排水系统安全、经济、高效的运行。本文主要分析研究了煤矿水泵与管路运行方式的节能优化措施。     

浅谈矿井排水机械设备的优化设计

结合实际就矿井排水设备的设计要素进行分析,对设备的排水管径、水泵工况点效率、工况点流量、允许吸水高度、工况点扬程及管路效率等因素与总体费用之间的关系进行确定,进而得出全年排水电耗及允许吸水高度与流量的相关性,并在矿井排水设备的设计中对允许的最大流量进行探讨,对设备的最大排水管径进行计算,最终在理论上达到了费用最低的设计目标,从而确定了矿井排水设备的选型优化设计方法。     

浅谈如何提高矿井排水系统的功效

对如何提高矿井排水系统工作效率的几种实施要领进行简要分析。主要从矿井排水系统中的对于水仓的清挖,水泵的检修,改善管网特性等方面入手,论述了如何采取有效措施提高矿井排水系统的功效。     

微阻缓闭止回阀在排水管路上的应用

为了防止排水管网中介质逆流及克服水锤力对水泵、闸阀、电机造成的破坏,《煤矿井下排水泵站及排水管路设计规范》(GB/T 50451-2017)中对矿井排水系统的排水管路作了必要的规定.简述了微阻缓闭止回阀的适用场合及特点,同时对微阻缓闭止回阀工作环境进行了研究分析.     

自动控制系统在矿井排水中的应用

矿井井下排水系统在矿井安全问题中占有重要地位。矿井涌水如果不能及时排出,将对矿井生产和工作人员安全构成威胁。排水系统耗电大,因此有效地控制排水系统是降低生产成本的重要途径。目前大部分矿山井下排水系统由人工控制,其效率低,操作人员多,严重影响企业生产管理和经济效益的提高。可编程序控制器(PLC)的广泛应用使井下排水的自动化控制成为可能。     

机电设备的自动化改造及维护探析

为进一步提升煤矿开采效率,保障煤矿开采的安全性,结合实例分析煤矿井下水泵系统排水中可实现自动化操作的过程,并且探讨自动排水系统的改造与维护工作。通过对排水系统的自动化改造,实现井下水泵房无人值守目标,对系统故障进行实时监控,便于系统的运行与维护。     

煤矿井下智能排水控制系统的应用

针对当前煤矿井下排水系统自动化水平低、故障率高、劳动强度大等技术难题,为了进一步提高井下排水效率,保证排水系统运行稳定性,避免井下水害事故发生,新景矿对井下盘区排水系统进行优化改造,采用了一套以PLC为核心的智能排水控制系统,并通过实际应用,取得了显著应用成效。     

煤矿井下自动排水装置设计

煤矿井下排水系统是煤矿安全生产体系中重要的一部分,但目前煤矿巷道排水系统仍存在积水点广泛、距离远,并且靠人工操作水泵的方式进行启停,难以应对煤矿的自动化和现代化的高速发展需求。通过对自动排水原理与工作模式的分析后,设计一套自动排水装置,并对整个排水系统平台排水管网进行构建,通过对井下易积水点布置传感器,并将控制装置小型化,对自动排水控制器的硬件与软件程序重点设计说明。该系统利用微机系统能实时监测井下水位情况,它的稳定运行实现井下排水的自动控制过程,井下煤矿的安全生产与效益极大提升。     

一种水中微量油检测技术及实验研究

本文基于紫外光谱法研究水中矿物油快速检测技术,实现现场、低成本、便携的微量油在线检测。实验测定水中原油乳化液的吸光度光谱特性,有针对性地选取定量测定所用紫外波长,有效解决峰值处检测分辨率低,受其他有机物干扰的问题。本文工作为日益紧迫的水环境中油污染检测,废水排放控制提供切实可行的新技术。     

轻便型货物列车超载偏载检测装置的研制

本文介绍研制成功的轻便型超偏载检测装置的背景、方法、设计原理、特点以及运用等,从实际运用的情况说明该装置具有轻便、快速、准确、可移动、操作简便、运行可靠等特点,在技术上具有创新,为确保铁路运输安全提供了一种装备和方法。     

Performance of synthetic oils in the hydrodynamic regime — 1. experimental

An investigation of the performance of environmentally adapted synthetic oils in the hydrodynamic lubrication regime has been carried out. Four oils have been tested: polyalphaolefin and ester based ISO VG46 oils as well as mineral ISO VG68 and VG46 oils. Tests were conducted in a facility containing two identical tilting‐pad thrust bearings typical of the design in general use. The differences between the mineral and synthetic oils in terms of maximum operating temperature, minimum oil film thickness, and bearing power loss have been examined. Substitution of the mineral ISO VG68 oil with an ISO VG46 oil slightly reduces the bearing operating temperature. This is due to a decrease in the basic viscosity. It is concluded that the ester base ISO VG46 oil can be used as an environmentally adapted replacement for the mineral ISO VG68 oil without sacrificing bearing safety. Such a change also offers noticeable energy savings. If the ester based oil is used instead of a mineral oil of the same viscosity grade, bearing reliability is improved by the increased oil film thickness.     

Gear Lubrication in Inert Gas Atmospheres

An investigation was made of the effect of inert gas atmospheres on the gear load-carrying capacity of lubricants. The experiments were performed in two types of gear test machines, using case-hardened AMS-6260 steel test gears. It was found that two mineral oils (a solvent-extracted turbine oil base stock and a USP grade white mineral oil), as well as the same oils fortified with different extreme-pressure additives, all exhibited a decided increase in load-carrying capacity when the gears were operated in an atmosphere of nitrogen or argon instead of air. On the other hand, the response of synthetic lubricants was not found to be necessarily similar. In fact, only one of the six synthetic fluids tested showed any significant increase in load-carrying capacity when the gears were operated in a nitrogen atmosphere.     

A heuristic method to determine the number of pallets in a flexible manufacturing system with several pallet types

This article presents a new heuristic method, called PANORAMA, that enables the determination of an appropriate number of pallets of each type that should circulate in a flexible manufacturing system. Production and return-on-investment constraints are considered. Statistical results derived using data from three existing flexible manufacturing systems, as well as randomly generated data, demonstrate the accuracy of the heuristic proposed.     

组态王在溴化锂制冷中的应用

本文阐述了吸收式溴化锂制冷机组的工作原理,制冷循环及控制工艺流程,并应用组态王监控软件实现控制方案,给出了运行的曲线。     

Characterization of the Lubricating Action of Oils Under Boundary Lubrication Conditions

Polyalphaolefin (PAO) and polypropylene glycol (PPG)-based lubricants as well as mineral oils were tested to characterize their wear reducing performance under boundary lubrication conditions, using the ISO 7148 test method, which was originally developed for the characterization of bearing materials.

This test method has practical value with respect to developing lubricants for use in sliding contacts, such as occur in worm gear drives. It is found that the wear reducing action of PAO-based lubricants is significantly better than that of mineral oils. PPG fluids perform equally well or slightly better than PA Os. Provided that viscosities are in line and additives are compatible, contamination of PAOs with mineral oils has no or only marginal effect on wear reduction.     

太阳能电池板自动跟踪系统的设计

本论文设计了太阳能全自动跟踪器,采用传感器定位和太阳运行轨迹相结合,弥补了赤道架型太阳能自动跟踪系统的缺陷,具有全天候、全自动、跟踪精度高等优点,充分保证了太阳辐射观测的需要,大大减轻了观测人员的劳动强度。     

工矿企业环境污染与职工健康管理信息系统

本文进行了工矿环境污染与职工健康管理信息系统[ISPS]研究,使用电脑将环境污染监测数据加以汇集,建立数据库模型,进行统计分析,此系统能够帮助企业掌握历年的生产安全卫生状况,环境污染及监测水平和控制伤亡事故,以实现企业安全卫生现代化和质量－环境一体化管理,并达到国际水平的标准,即GB19000－ISO9000（质量管理体系）和GB24000－ISO14000（环境管理体系）。     

Enhancing microscopy images of minerals through morphological center operator‐based feature extraction

To well enhance the mineral image and image details obtained by microscopes, an effective mineral image enhancement algorithm through feature extraction using the morphological center operator is proposed in this work. First, mineral image feature extraction based on the morphological center operator is proposed and discussed. Second, the multiscale extension of the mineral image feature extraction is given by using the multiscale structuring elements. Third, the important mineral image features at multiscales of image are extracted and used to construct the final mineral features for mineral image enhancement. Finally, the original mineral image is well enhanced through importing the extracted final mineral image features into the original mineral image. Experimental results on different types of microscopy images of minerals verified the effective performance of the proposed algorithm for microscopy mineral image enhancement. Microsc. Res. Tech., 2013. © 2012 Wiley Periodicals, Inc.