桥式起重机点动控制电气回路

July 10 2008, 9:46 PM

1概述
     我公司下属机械汽车修理厂的检修车间有两台st/10.5m桥式起重机,专供检修机械及汽车时作起 吊之用。由于检修汽车时发动机汽缸的找正,对电动葫芦的上升量及下降量的要求很严格,在某一位置时升降机量必须很小,否则汽缸无法找正。这就要求电动葫芦必须具有点动控制,但从厂家购回来的电 动葫芦设有此装置,它没有严格的升降量,这对于汽车发动机维修很不方便。由 于这种实际操作的需要,我们对桥式起重机的电气控制系统进行改进,在上升及下降的电气回路中各增加一只中间继电器 1ZJ(或 2ZJ),同 时增加一个组合开关 LK,其工作原理是利用交流接触器和中间继电器得电的时间差,从而实现点动控制。

2电路的改装方法
    改装后的电气线路图见图1,虚线框内为增设部分。把中间继电器 IZJ的常闭辅助触点串人到原 来的上升回路中,把上升回路继电器3C的常开触
点和中间继电器 IZJ的常开辅助触点橡胶模具并接后,再与LKl、2ZJ的线圈串接并人上升国路中。 同理,把中间继电器ZZJ的常闭辅助触点串人到原来的下降回路中,把下降四路继电器4C的常开触点和中间继电器 ZZJ的常开辅助触点并接后再 与 L K。、 ZZJ的线圈串接并人上升回路中。LKl、LK2为同一个组合开关 LK的两对同向接点,当它们断开时此控制回路跟一般桥式起重机相同 ;当LK组合开关合上时LK组合开关的两组同向接点LKl、LK。同时接通,上升及下降回路处于点动控制状态。

3工作原理
    当总停开关KK合上时控制回路的总电源接通,交流接触器 QC由于线圈得电而动作,主电路中的QC主触 点闭合,主回路的总电源接通,此时主回路及控制回路处于工作准备状态。
3.1不需要点动控制
     当需要 较大的升降量时把组合开关LK断开,即它的两组同向触点LKl、LK。断开。升降机当按下3LA按钮 时交流接触器3C的线圈得电,3C的主触点合,电动葫芦得电而上升弹簧,同时接在下降回路中 的3C常闭辅助触点断开,防止电动葫芦的误动作下降,这时虽然点动控制回路3C的常开辅助触点闭合,但由于LKl断开无缝管,所以上升点动控制回路的中间继电器 IZJ的线圈没有得电而使中间继电器IZJ不动作,所以点动控 制不起作用。只要按住3 LA按钮,电动葫芦就一直上升到上极限点。同理,当按下4LA按钮时交流接触器4C的线圈得电,4C的主触点闭合,电动 葫芦得电而下降,同时接在上升回路中的4C常闹辅助触点断开,防止电动葫芦误动作而上升,这时,虽然点动控制回路 4 C的常开辅助触点闭 合,但由于 L K。断开,所以上升点动控制回路的中间继电器ZZJ的线圈没有得电而使中间继电器ZZJ不动作,所以点动控制不起作用。只要按 住4 LA按钮,电动葫芦就一直下降到下极限点。
3.2需要点动控制
   当要求升降量极小时把组合开关LK合上,即它的同向接点 LKl、 LK。同时接通,此时点动控制回路处于 工作准备状态。当按下 3 LA按钮时 3 C线圈得电, 3C常开触点和接于升降电动机的主触点闭 合数据恢复 ,电动机上升,同时 IZJ线圈得电,其常闭辅助触点断开,常开辅助触点闭合,3C线圈断电,3C常开触点和3C主触点断开,电动机失电而停止 上升。这时,只有松开 3 LA按钮后再次按下,电动机才能再次上升,由于电动机得电的时间很短,所以上升量很小,这样就实现了点动控制上 升。同理,当按下4LA按钮时4C线圈得电, 4C常开触点和接于、升降、电动机的主触点闭合,电动机 下降,同时2ZJ线圈得电,其常闭辅助触点断开,常开辅助触点闭合,4C线圈断电,4C常开触点和4C主触点断开,电动机失电而停止下降。这时 ,只有松开4LA按钮后再次按下,电动机才能再次下降,由于电动机得电的时间很短,所以下降量很小,这样就实现了点动控制下降。这两台桥 式起重机改装后运行良好,为汽车修理作业带来了极大的方便,提高了汽车及其它机械的修理质量。同时也提高了经济效益。

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Two test examination imminent

June 6 2008, 5:35 AM

College enrollment this year, the city unified examinations and academic junior high school graduates will soon test examination, yesterday afternoon, city leaders and lead responsible comrades of relevant departments, in-depth examination centres to schools, field inspection and test test(网站优化,搜索引擎优化,SEO) test junior secondary school graduates ready for work, condolences考点Staff.

The second school in the city, city leaders heard a work report, on-site coordination to solve the college entrance examination and junior secondary school examinations of the problem. Education-related requirements leading to the entrance examination institutions with the relevant functional departments of coordination, and actively take effective measures to ensure the safety of papers, examination security, safety (升降机,升降平台)candidates. It is necessary to strengthen the comprehensive management of the examination environment, crack down on organized use of wireless communications tool of cheating, the Education Examination candidates abide by the rules, integrity test, to build together a good test environment, work hard to ensure foolproof security papers, test management Dishuibulou, and Ping An examination of the Olympic Games, so that candidates be assured, the satisfaction of the masses.

It is learnt that the college enrollment this year, the city unified examination time (升降平台,登车桥,升降机) for the June 7, 8, the city's total of 88,523 people enrolled in the general college entrance examination, of which 22,638 were like literature, history, science and engineering 61,407 people, Art 3550, sports 928. By then, candidates will test 20, 83考点, 3019 examination room to take the test. Junior middle school graduates academic examination time for the June 28, 29, the city will have 95,524 students in 21 test areas, 134考点the 3233 examination room to take the test.

Gankao bus service stations reported(弹簧,升降机,数据恢复) candidates to change voice "gentle"

During the test, pass through the city centre City, Tanggu, Hangu, Toray, and other test sites in front of nearly 100 bus lines, will reduce the voice of vehicles at stations to ensure good quality cars is not bad cars, timely intervals encryption 000 , The former test centre to remind drivers do a good job, through these human services, for the candidates and their parents to provide satisfactory service(同声传译,同声翻译,同声翻译设备,升降机) by car.

In June 7, 8 pm on the examination before and after peak hours by car, bus companies to ensure that the market operators of motor vehicles of good, bad truck stop half-way; via the examination room of nearly 100 bus lines, will be timely 000 to the 23 minute intervals shorter than usual; car to the test centre to be, the driver should prompt candidates Nahao portable items, to get off to get prepared; encountered roads blocked, candidates lost items or physical discomfort, and other special circumstances, the driver Along with the traffic police should timely communication, and to take emergency measures to facilitate the candidates. During the examination period, the test centre of the bus stops in front of vehicles to reduce the voice synthesizer, the station reported voice(高空作业平台,液压升降机) to ensure that the test centre in front of the school environment.

Gankao reference to the five major security measures around smooth and orderly test centre

June 7 and 8 two-day test period, the department will pay the college entrance examination test centre in the city's traffic police deployed to safeguard the implementation of traffic order and other five measures to ensure that the test centre and the surrounding roads smooth and orderly.

During the test, the department will pay the college entrance examination test centre in the city and the surrounding roads divert traffic police deployed 1,000 vehicles and maintain traffic order, to inspect traffic interruption in the test center and the surrounding road inspections, and remove (液压机械,升降平台)hidden dangers of traffic Yong resistance. The county traffic police detachment to tie in with the comprehensive law enforcement departments in the examination room clean-up day of the test ahead of the surrounding roads of illegal hawkers Road, in accordance with the law regulating the surrounding road vehicle parked in the examination room, suggesting that parents should not candidates in the test centre around a long time stranded. From June 1 onwards for a three-Ming Laba on the motor vehicle traffic offence special rectification action for the college entrance examination "services", the Traffic Control department will be in urban primary and secondary schools,考点surrounding roads, residential areas, etc. additional large-scale rectification Point, Strict accordance with the law, prosecute the offenders Ming Laba and other traffic offence, to strictly control the traffic noise.

In addition, the case of candidates in general and the invigilator following traffic accidents, traffic police on duty according to law applicable summary rapid processing or disposal to take appropriate measures to ensure that candidates and invigilators (升降台,升降机,铝合金升降机)personnel rushed to the examination room. If the case of delivery of examination papers of vehicles involved in a traffic accident, traffic police rushed to the scene in time streaming divert, if necessary, to take temporary traffic control measures to ensure the safety of papers served.

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Different generations have the generation gap betw

May 28 2008, 11:01 PM

Workers aren't bridging the generation gap because 20-something employees rarely chat to those in their 50s and 60s, according to a new survey.

  The poll of 3,494 adults by employment services groupAlcohol Tester,Gas Alarm,Alcohol Tester,Breathalyser,Breathalyzer. 博客,液压升降机,液压机械 Randstad USA showed that 51 percent of baby boomers and 66 percent of older workers report little to no interaction with their younger colleagues.

  Employment experts fear the lack of communication could create a shortage of US skilled labor because retiring baby boomers aren't passing on their knowledge and experience.

  "Older workers stereotypically view younger workers as not as competent and not having such a work ethic," said Eric Buntin, managing director of marketing and operations for Randstad USA. "Younger workers view the older as not thinking outside the box."

  He said the different generations of employees do not have 升降平台,升降台,升降机,铝合金升降机,高空作业平台,弹簧,数据恢复,the same expectations of work and values of employment, which is a difficult gap to bridge.

  "The key is that organizations find a way structurally for generations to interact but it can't be a rah-rah coffee or lunch," Buntin said.

  "It has to be bringing them together in meaningful ways so they're engaged in projects together and that has to be managed in the course of time."

  The survey examined four generations, Generation Y, born between 1980 to 1988; Generation X, born 1965 to 1979; baby boomers born in 1946 to 1964 and matures born before 1945.

  The survey also showed that three of the four generations said they have little to no interaction with the most experienced workers -- matures.

  一项最新调查显示,员工之间也有“代沟”,20多岁的员工很少与五六十岁的员工交流。

  由“任仕达美国”职业中介公司(Randstad USA)对3494个成年人google排名.升降平台,登车桥,升降机,地震,升降机,同声翻译设备,无缝管,RAID数据恢复,服务器数据恢复开展的民意调查显示,51%出生在“婴儿潮”的员工和66%年龄较大的员工称他们很少或从不与年轻同事交流。

  就业专家担心,年轻员工与年长员工之间缺乏交流会导致熟练劳动力的短缺,因为将要退休的“婴儿潮一代”无法将他们在工作中积累的经验和知识传授给年轻员工。

  “任仕达美国”营销与运营部的营销总监埃里克•邦汀说:“年长员工对年轻员工抱有一种成见,他们认为年轻员工不够称职,职业道德欠缺;而年轻员工则认为年长员工观念保守。”

  他说,不同年代员工的职业期望和就业价值观不同,这是一个难以弥合的鸿沟。

  邦汀说:“解决这一问题的关键在于公司要找出一个促进不同年代员工之间‘结构性’互动的办法,但这并不是说大家坐在一起闹轰轰地喝杯咖啡或者吃顿饭就行了。”

  “公司要通过有意义的方式将大家聚在一起,WOW Gold,WOW Power Leveling,WOW Gold,World Of Warcraft Gold,World Of Warcraft Power Leveling. Gas Detector,Co Alarm,Co Detector比如一起做项目,这种机制迟早得建立。”

  该调查共对四代员工进行了访问,包括1980年至1988年出生的“Y代人”(80后)、1965年至1979年出生的“X代人”、1946年至1964年出生的“婴儿潮代”和1945年以前出生的老一辈人。

  调查显示,其中三代的员工称他们很少或从未与最有经验的老一辈员工交流过。

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对付男人,女人应该学会这些善意的"谎

May 25 2008, 10:05 PM

对付男人,女人应该学会这些善意的"谎言"

你是对的

你的男友出类拔萃,可总有些盛气凌人的感觉。突出表现在和你谈天论地的时候总是喜欢争论,而且一定要分个高下,当然如果 是你高他下,他肯定不会停止,google 优化 google 左侧优化 排名,google优化,google左侧优化排名。他会在马路上突然提高音量,为了电影中某个角色的演技高低和你较劲,你不愿意和他在一些无伤大雅的问题上大费口舌。此刻,提 高音量和他针锋相对显然是欠明智的,你需要给男人一点面子,哄哄他:“你是对的,说得蛮有道理的。”暂时的退让只是为了日后更好地取用,你终有一天会让他 输得心服口服。

我爱运动

男人对体育的狂热我们永远无法理解。他总是一下班守着电视比赛目不转睛,一上床 就抓起《足球报》《新体育》看得眉飞色舞。他看了意甲足球联赛看德甲赛,看了德甲看西甲,接着进入NBA循环赛看乔丹看姚明。如果你告诉他,你也喜欢运 动,并且坐下来陪他看看足球,你就能够迅速地杀入他的世界。如果有一天,你受不了他每天看着足球杂志却看不到你,就可以对他说:“我爱运动,特别爱和你一 块儿运动。”接着你就拉着他的手去公园慢跑,拖着他到江河湖海去游泳,顺便看看落日。如果他胆敢不从,你就一针见血指出他是光说不练的伪运动迷,男人脸上 挂不住了,他就依了你了。

我不介意你看别的女人
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当男人的眼珠直溜溜地盯着超市里那个红发少女看时,你怒 从心头起,恶向胆边生。尽管你没有沉鱼落雁之色,闭月羞花之容,你希望男友的眼睛总是老老实实守候着你,从一而终。一旦男友的眼珠“走私”,你想用劈空掌 隔山打牛似的将潜在的情敌打飞,或用吸星大法将男友的视线牢牢控制在你方圆N平方厘米内。完全不必当众翻脸给他难堪,最好的办法是说一句言不由衷的谎言: “我不介意你看别的女人。”再找机会暗示他“己所不欲,勿施于人”。如果他好像还是不太明白,那么你和他在一起时做出夸张的观望态势,全天候扫描过往的帅 哥。他在感觉到有些醋意的时候就会收敛了。

我不介意你有多少银子

现在市面上有很多少年得志,腰缠万贯的 男人,可你的男友现在只是一个囊中羞涩的打工仔。你爱上他,不是因为他的存折,而是因为他的本身。因为他健康、勤奋、幽默、善解人意而又忠实可靠。你选择 他是因为你认为他是潜力股,他会富起来,他会让你的后半生过上物质文明和精神文明双赢的生活。没错,这是你的如意算盘。可现阶段他的确没有给你买房,买车 的能力,为此他时常向你道歉,抱怨自己没本事,让你受苦。此刻,无论如何你要编出一个美丽的谎言:“我真的不介意你有多少银子。”我喜欢你的朋友们

他的狐朋狗友大口喝酒,大块嚼肉,事业无成却依然高谈阔论,不复是少年仍旧指点江山。这些臭男人你看不顺眼,可是对他却很重要。就算他们中偶有优秀的人 士,你也不愿意总有个灯泡照亮你和男友亲密的眼神。那怎么办呢?说你不喜欢他们吗?他会认为你挑剔,认为你不给他面子,认为你不认同他的友情和义气。所 以,你心里再怎么不爽,千万别说出来,说出来就伤了他的面子,也伤了他的感情。所以,如果不得不和那些臭男人们一起宵夜,学着喜欢他们吧,至少也要假装喜 欢他们。然后,慢慢用你的日程蚕食他的时间,悄悄减少他和狐朋狗友的“友好访问”。如果有天他突然发现,怎么好久没聚会了,你也可以笑咪咪地说:是啊,还 真挺想他们的。

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亲爱的,假如我先你死去

May 25 2008, 9:47 PM

伴着凄美的小提琴曲《梁祝》,在键盘上敲击出这一行略显冷酷的字“爱人,假如我先你死去”。或许活着的人极少愿意去谈论“死”这个不吉利的话题,其实想来世事无常,死是任谁都无法拒绝的最终归宿。踏入婚礼殿堂的人们接受到的最多的祝福便是白头偕老,而实际告别世界的两个人总是要有先有后。大凡人们的美好祝愿都是现实中难以实现的,正因为其难以实现才显得更加让人想往。   爱情,人类永恒的话题,人们把无数美好的字词附加在她的身上,归结起来对爱情的歌颂与祝愿,无外乎两个字“永恒”。谁都希望自己能够拥有一份永恒的爱。美丽、凄婉的爱情故事《梁祝》,在英台翩然跃入坟中,梁祝化蝶,蹁跹飞舞于人间中实现了其爱的永恒:生不能同衾,死也要同穴!将人们对爱的美好期盼升华到了一个最高境界。但传说终归是传说。   前两日看到同事一直情绪低落,问其缘由,她给我讲了一直让她心情郁闷的原因:她的一个好友是一所中学老师,丈夫是一家大企业的副总,事业可以说正如日中天,夫妻二人白手起家将日子过到现在,实数不易,因此两个人的感情非常非常好,尽管已经过了浪漫的年龄,但两个人出入总是成双成对,熟悉的人无不为这对恩爱夫妻所感动。如果没有那个突如其来,或许这夫妻二人真的就成就了一段爱情佳话。那天深夜,妻子没有任何征兆的突发脑溢血,那么快的就告别了他深爱的丈夫、女儿。就在朋友们还没从这意外事件的悲哀中走出来,还在为被妻子抛下的男人哀伤的时候,就传出了副总已经开始频频见面,寻找接替前妻位置的人的消息,那时距妻子离去还不到一个月……3个月后副总结婚了,大摆筵宴,迎亲的车队排出了好远好远,……同事虽应邀却没有参加婚礼,因为她无法忘却自己女友当初结婚时那只有好友和家人的两桌家宴……   听了同事的叙述,我默然了:人都有追求幸福的权利,可是我无法理解的是——怀念的期限是多久?忘记一个人要多长时间?   

那日回家吃过晚饭闲聊时,我很郑重的问老公:如果有一天我突然死去,你会怀念我多久?”老公先是用一种惊异的目光看了我良久,然后送我一句话:“你有病啊,活得好好的,说这干嘛?”“不,你一定要回答我。”“不会的,你不要留下我一个人,我们要相约在一天死去。”女人就是感性动物,尽管我知道这又是一个几乎不可能实现的美好许诺,但我还是为之感动了,为的不再破坏老公这份浪漫的许诺,我没有再问下去。   三毛愿以不死鸟来自喻,以表达自己对亲人的爱。我在为之感动时,暗暗自愧没有三毛的境界。“爱人,假如我先你死去”,在“假如”还没有发生时,这实在是一个难有答案的问题。还是让我用自己的感受来结束这段文字吧。   “爱人,假如我先你死去,请你怀念我的时间久一些,不是为我,而是为了平衡活着的亲人的心理。然后在某一天,将一个你爱的和爱你的人领进昔日属于我的小巢,用微笑继续你的生活。但请一定一定答应我一件事——将我的所有照片好好藏起,不要让另一个世界孤独的我,嫉妒你们的幸福,因为我始终是一个女人、一个自私的爱你的女人、一个小气的女人……”

 

 

 

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Last update Jul 10, 2008