水泵

This paper discusses such design problems in heating systems with the pres- sureless boiler as how the pumping head of the cycle pump is selected ,where the cycle pump is installed and whether the expansion tank is necessary.

针对无压锅炉供暖系统设计中有关循环水泵扬程的选择、循环水泵的设置高度及是否设置膨胀水箱等问题从理论和实践上进行了探讨，得出了可供设计人员实际应用的计算公式，介绍了几个关键问题的处理方法，澄清了一些模糊认识。

The principle of this kind of automatic ice thickness monitoring system is realized by detecting the vertical distance between the ice bottom and a fixed point in the water, which is measured by using a barrel moving from the fixed point to the ice bottom.

随浮桶一起运动的压差式水位传感器分别给出浮桶位于固定端和冰层底面的位置，而浮桶的运动则依靠数据采集仪控制浮桶内水泵排吸水改变浮桶的重力来实现，并且该仪器能够记录传感器的信号和设置水泵开关的开、闭时间。

Drainage system Design of drainage system is it discharge way drain off water the sureness of the system to include; Calculation of the flow of second of design of the sanitary sewage drainage pipeline of the building ; Is it in charge of sideways to drain off water , water conservancy in charge ofed to set up calculate and in charge of pipeline slope , pipe diameter and sureness of elevation sideways, set up calculation to in charge of pipe diameter , is it confirm pipe diameter size and position and sewage waste water design of the inspection shaft after discharging of breather pipe to come from this.

消火栓给水系统消火栓给水系统的设计内容具体包括：根据建筑物性质选择设计参数，包括每支水枪的射流量、消火栓的口径、水枪口径、龙带长度等；消火栓系统计算，具体包括消火栓的布置计算和消防立管和横支管的水力计算；减压孔板的计算；消火栓设施的确定，包括水泵结合起的设置、消防水泵和泵房的要求。

2 Should ensure that the cooling pond, cleaning, there must be no debris, dirt, every six months to carry out a sea of washing machines, water pipes, to remove scale, it would be specific about 25 kg of hydrochloric acid into the plastic bucket, then on the pump inlet and outlet pipe in plastic buckets together Add to the closure of machine power, a separate 15-minute run to open pumps, hydrochloric acid in the sea in circulation, remove furring.

3.2 应确保冷却水池内清洁，不得有杂物、污垢，每六个月要对机器水路进行一次清洗，除去水管内水垢，具体做法是将25kg左右的盐酸倒入塑料桶中，然后将水泵上的进水管和出水管一并放入塑料桶中，关闭机器电源，单独开启水泵运行15分钟，使盐酸在水路中循环流动，可以除去水垢。

According to the idea of diversification in studying hydraulic performance of low head pump system, a new method to separate outlet conduit from the pump system is presented to simulate its flow pattern and calculate its hydraulic loss.

根据研究低扬程泵站水泵装置的方法可以多样化的观念，提出了将出水流道从水泵装置中分离出来，进行出水流道内部流态数值模拟和水力损失计算的方法。

Mine drainage pump are the most commonly used type of pump for the discharge with smaller abrasive solids of water, sand and can also be used for the emission of suspended solids, solid particle size to filter the largest aperture (usually 7 ~ 12 mm).

排水泵是矿山中最常用的水泵型，用于排放含磨蚀性较小的固体的水，也可用于沙子和悬浮固体的排放，固体颗粒尺寸最大为滤网孔径（通常为7~12毫米）。

HVAC piping design with valve selection 1, chiller plant, cooling water between inlet valve design; 2, before the butterfly pumps, filters, pumps after the check valve, butterfly valve; 3, sets, water separator pressure differential between the bypass valve; 4, set, divider into the returning pipe valve 5, the level of dry pipe valve; 6, valve air handling units, filters, electric two-pass or three-way valve 7, fan coil valve (or plus electric two-way valve) Note: The valve is typically used when the diameter is less than 150mm used Handle Butterfly Valve (D71X, D41X); diameter greater than 150mm used worm drive butterfly (D371X, D341X).

暖通空调管道用阀门的选型设计 1、冷冻水机组、冷却水进出口设计蝶阀； 2、水泵前蝶阀、过滤器，闸门水泵后止回阀、蝶阀； 3、集、分水器之间压差旁通阀； 4、集、分水器进、回水管蝶阀 5、水平干管蝶阀； 6、空气处理机组闸阀、过滤器、电动二通或三通阀 7、风机盘管闸阀注：一般采用蝶阀时，口径小于150mm时采用手柄式蝶阀（D71X、D41X）；口径大于150mm时采用蜗轮传动式蝶阀（D371X、D341X）。

We hope you pay more attention to jobs are as follows haven't been finished this week:(1) right and left side of upper water wall has been aligned and fixed;(2) Nine downcomers been pre-stored;(3) All the wall packing aligned and fixed, then install right and left side rigid beam;(4) Finishing welding counterpart of front wall packing;(5) Get two booster pump for turbine driven boiler feed water pump aligned and make inspection;(6) Electric Feed Water Pump Unit, Coupling and Motor Pump positioned;(7) Equipment in Start-up Boiler House aligned and make inspection;(8) Get three Reusing Water Pump aligned;(9) Equipment in Integrated Water Pump House aligned and make inspection.

本周，以下工作未完成，希望贵单位引起重视：（1）上水左右侧找正完，且加固完；（2）下降管9根预存完；（3）包墙全部找正完，加固完，之后安装左右侧刚性梁；（4）前包墙对口焊接完毕；（5）2台汽动前置泵找平找正，并验收；（6）电动给水泵组，耦合器和电泵就位；（7）启动锅炉房内设备找平找正，并验收；（8）3台复用水泵就位；（9）综合水泵房内设备找平找正，并验收。

Job as follows shall be finished next week:(1) Get right and left side of upper water wall positioned and reinforced;(2) Finish Pre-store nine downcomers;(3) All the wall are positioned and reinforced, and then install right and left side rigid beam;(4) Finish front wall counterpart welding;(5) Hoisting two rare roofs, Middle-temperature RH, four high temperature RH headers, hoist headers of middle-temperature RH and high-temperature RH, it can't install lifting rod.

下周，锅炉以下工作需要完成：（1）上水左右侧找正完，且加固完；（2）下降管9根预存完；（3）包墙全部找正完，加固完，之后安装左右侧刚性梁；（4）前包墙对口焊接完毕；（5）后顶棚吊装2片、中温再热器、高温再热器集箱4个，吊挂中再和高再集箱时，不能安装吊杆。6）2台汽动前置泵找平找正，并验收；（7）电动给水泵组，耦合器和电泵就位；（8）启动锅炉房内设备找平找正，并验收；（9）3台复用水泵就位；（10）综合水泵房内设备找平找正，并验收。

Feed pump system, which may comprise of one or more pumps to distribute the feedwater to the membrane units.

水泵系统，可能包括一项或一项以上的给水水泵分发单位膜。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。