浅谈起重机的技术性能,载荷及钢丝绳的选用

根据起重伤害事故在鞍钢设备检修中所占的比例仅次于高处坠落的现实情况,对合理使用起重机,规范管理,科学地控制起重伤害事故,做了参考性论述。     

浅谈塔式起重机的事故原因分析及安全管理对策

本文从本市及其它地区发生的塔式起重机安全事故入手,比较详细地分析了塔式起重机发生事故的原因,并提出了减少和防止发生塔式起重机伤害事故的安全对策.     

对在用起重机吊钩的检查及检验

为保证起重机吊钩的安全使用，防止发生吊钩坠落事故，需完善吊钩的检查和检验。介绍了对使用中的桥、门式起重机所用吊钩的检查和检验。     

定子调压调速技术在桥式起重机上的应用

１引言桥式起重机是工业生产中重要设备之一。桥式起重机的工作正常与非正常状态关系到安全生产、产品质量、生产效率等,马钢公司现有５t以上的桥式起重机约４９０多台,最大吨位达１８０t。这些桥式起重机有普通桥式吊,也有专用的脱锭吊、电磁吊、抓斗吊等特种吊车。桥式起重机一般有主提升、副提升、大车走行、小车走行机构,对专用吊车也分别有顶杆机构、电磁盘、抓斗开闭机构等。２桥式起重机传统控制系统存在问题桥式起重机的电气控制几十年来采用传统的继电器———接触器控制系统,所用电机大部分采用绕线式交流电机,同时为了满足…     

铸造用电动双梁桥式起重机抗震分析

基于有限元法,采用ANSYS软件对某型铸造用电动双梁桥式起重机进行了力学建模,完成了在特定工况下抗震和静力计算,得出了大车轮压值。结果表明,此桥式起重机在最大操作负荷加极限安全地震(SL-2)引起的载荷条件下能保持负载不掉落、不与建筑物发生碰撞。整机的抗震分析过程对同类设备具有良好的工程借鉴意义。     

起重机械危险因素及安全管理对策

介绍了湖北省大冶有色金属有限公司冶炼厂起重机械设备状况,以风险控制和隐患管理的理念,对冶炼厂近年来发生的起重机械伤害事故进行了统计、分析;重点就如何采取有效的安全管理对策,预防和控制起重伤害事故进行了阐述和有益的探讨.     

YWK10脚踏变频鼓式制动器的应用

行车大车平移机构的制动关系到安全生产。当行车运行时,突然失电,有可能发生相邻行车相碰,造成行车上人员坠落或者是车上杂物、吊装物坠落伤人或砸坏设备,且对行车本身破坏性比较大。制动装置不工作,频繁开、倒车容易造成大车减速器漏油、地脚崩、低速轴断、基础板裂等设备故障。选择可靠的制动器可以减少安全事故发生,降低行车的故障率,提高行车工的工作效率。     

莱钢推行32210安全管理模式

莱钢实施32210安全管理模式,采取＂三消除＂管理,消除管理缺失、人的不安全行为、物的不安全状态,提高现场本质安全化程度;夯实＂双基＂、＂双因素＂管理,强化应急管理,制定轻伤以上人身伤害事故为零的目标管理体系,实施零目标管理。通过模式实施,型钢炼铁厂安全绩效持续提升,连续多年实现了重伤以上人身伤害事故、重大设备事故、重大火灾事故和负主要责任的重大交通事故为零的目标。     

桥门式起重机安全技术检验现状分析

本文通过对桥门式起重机安全技术检测，从安全装置，电气，机械，金属结构零部件等方面分析桥门式起重机安全技术情况，说明实行起重机械安全监察和检测检验对企业加强起重机械安全管理，杜绝和减少起重伤害事故具有重要意义。     

安全制动器在450 t铸造起重机主起升机构的应用

结合鞍钢股份有限公司鲅鱼圈钢铁分公司450 t铸造起重机主起升机构配置的安全制动器,阐明了生产中在传动链出现问题或主起升机构超速时,安全制动器能迅速抱闸,从而有效避免发生钢水罐坠落等重大事故。     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Fractures in childhood in Khartoum

A prospective study of fractures in 231 children received at Khartoum North Teaching Hospital(KNTH) was carried out for a period of six months. The incidence of child fracture rated as one per day, then it increased from the age of 5 years onwards in boys and between 6 and 8 years in girls. Most injuries were sustained during the day time, especially between late afternoon and sunset. 82% of injured children presented to a medical facility, while 18% were taken to native healers first. Non-road traffic accidents accounted for 84% of the fractures mainly due to sports, domestic injuries and falls; whereas road traffic accidents were 16% and occurred mainly in pedestrians. Forty three percent of the fractures needed only first aid and splintage while 42% needed closed reduction. Thirty one percent of all patients were treated as inpatients. The long bones were affected in 91% of all fractures, the commonest site being the distal end of the forearm (26%), followed by supracondylar fracture of the humerus (15.6%). In the upper limb, left-sided fractures predominated. The epiphyseal injuries were 3.5% of all fractures, mainly at the distal radial epiphysis. Boys were commonly affected between 13-15 years of age. Open fractures constituted 9.8% of the series and were mainly due to traffic accidents in town dwellers, the most vulnerable bones were those of the leg and foot. Pathological fractures accounted for 2.2% and were due to bone cysts and osteogenesis imperfecta. The problem of child safety and the preventive measures need to be more stressed.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.     

Problems in falling in love

Certain patients enter psychoanalysis because of their inability to love another person. Often they report a repetitive erotic pursuit of desired partners, without being able to experience or maintain loving feelings. Kernberg has understood such difficulties as representing effects of early narcissistic disappointments and/or of difficulties in resolving oedipal conflicts. In this paper, Lacanian concepts of the mirror phase and symbolic love are employed to develop these issues. Sexualization of problems in mirroring may be fused with oedipal conflicts in some cases. An extended vignette is presented to illustrate the technical and theoretical issues.