建筑给排水设计中水泵选用实例_中国化工泵网_新浪博客

译文:
[ 摘 要 ] 建筑给排水设计中水泵的选择至关重要。给水泵、排污泵、消防泵在选择时应根据各自系统的特性及水泵参数、维护保养各方面因素综合考虑确定。 [ 正 文 ] 1 工程概述 香溢大酒店地处杭州市繁华的商业、金融中心,位于老城区解放路中段,东靠火车站,西邻西湖。大厦由地下2层、地上21层、中间2层技术层组成,是集客房、康乐、会议、餐饮、酒吧为一体的四星级宾馆。建筑面积为3.2万m2,建筑高度为75m。 大酒店裙房给水系统、主楼给水系统,地下室污废水排水系统,消火栓、自动喷水灭火系统等设计要满足使用功能,系统中水泵的选择较为关键。水泵的特性、参数、价格、售后服务直接关系到系统投入运行时的稳定、安全及固定设备一次性的投入和水泵的日常维护和保养。在设计调研过程中,我们经过对各水泵参数的分析比较和对工程实际应用情况的考察,{zh1}选用了DL、QW、XB等系列水泵。现提出设计选用水泵的一点认识和体会,供大家参考。   2 给水泵的选择 香溢大酒店生活给水采用上行下给方式,即市政给水管网两路环网供至地下生活水池,水泵分别提升至裙房、主楼屋顶水箱,然后以重力流至各用水点。水泵的启停由液位控制仪来控制。采用上行下给这种供水方式,屋顶水箱起到了中间调节作用,水泵启动运行时 Q~H值较恒定,Q~H值不随用水点水量的大小变化而变化,设计中选择水泵只要满足计算Q~H值即可。但应注意所选择水泵的Q~H值不宜大于设计计算的Q~H值很多,一般宜控制在大于设计计算Q~H值5%左右。按上述原则,我们在设计中裙房、主楼给水系统水泵选定为65DL3215×3和80DL5020×5型水泵。上述水泵参数见表1。  3 排水泵的选择 香溢大酒店地下2层设有水泵房、空调机房等设备用房及洗衣房、职工餐厅、浴室、厕所等服务用房。设计采取分别设置污废水的集水池来收集污废水,然后用潜水排污泵分别提升输送至室外化粪池和市政排水管网。要使地下室污废水排放畅通,在选择排污泵时要考虑到地下污废水特别是粪便水中含有较多的线状物质。排污泵要具有一定的抽吸、撕裂线状物质的功能,否则易造成排污泵的堵塞,损坏电机。经综合分析后,设计中选定了100QW系列潜水排污泵。该系列泵具有抽吸20cm以下线状物品的功能,且内部设有自动探头,能有效地控制过载、渗漏、短路,特别适用地下室污废水的抽吸。 排污泵选择还应考虑一次抽吸时间,这关系到排污泵每小时启动次数和集水池容积大小。参考有关资料,一般排污泵一次抽吸时间不少于5min,我们在设计中将排污泵一次抽吸时间定为10min,集水池容积为5m3。这样排污泵启动约2次/h。集水池深度一般为1.2m 较合适。  4 消防水泵的选择 香溢大酒店属一类高层民用建筑,根据《高层民用建筑设计防火规范》要求,消防用水量为:    a.室外消火栓Q=30L/s,火灾延续3h;    b.室内消火栓Q=40L/s,火灾延续3h ;    c.自动喷水灭火系统Q=30L/s,火灾延续1h。 消防系统供水方式按"高规"要求:"当静水压力大于0.8MPa时要采取分区供水",为此设计中采用分区并联供水方式。 消防系统供水方式确定后,消防系统设计的关键在于消防设备的选择。按"高规"规定,消防水泵需1用1备。这样消火栓高区、低区要设4台消防泵,自动喷水灭火系统高区、低区要设4台消防泵,两个消防系统需设8台大功率、大流量消防泵。在设计调研中,发现水泵行业推出了一种新型的多出口消防泵,该泵同时具有向高区和低区供水的能力,这样只要选用 4台消防泵即可满足消火栓、自动喷水灭火两大系统高低区供水要求。查阅了生产厂家多出口消防泵的技术参数后,有一个问题困惑了设计者,即每幢建筑物的火灾着火位置是一未知数,如果火灾发生在高低区分界层时,高区、低区消火栓、自动喷水灭火系统同时开始喷水灭火,此时消防水泵高低区出水口同时开始出水,消防水泵的流量、扬程还能达到设计要求吗?经向生产此类消防泵的厂家有关技术部门咨询,均未得到满意答复。带着这个困惑要求消防泵生产厂家对消防泵作有关分界层技术参数试验。1998年1月19日,我们对设计选定的"XB"系列多出口消防泵进行了流量、扬程测试。在测试前设定了一组参数,即高区单独出水、低区单独出水、高低区同时出水,测试得参数见表2。 从以上测试数据来看,"XB"系列多出口消防泵Q~H曲线变化较平缓,xx能满足分区上下层同时出水的要求。多出口消防泵对高层建筑室内消防给水系统供水是可靠的,系统是经济的,可以说是比较理想的消防供水系统。 5 小结 建筑给排水设计特别是高层建筑给排水设计,每个系统对水泵都有不同的技术、使用要求。要使各系统都能正常、安全、高效地投入运行,给排水设计中水泵的选择应综合考虑水泵特性、参数、适用范围、水泵生产厂家的生产技术力量及水泵的价格等各方面因素。对于新开发研制的水泵,特别要了解清楚各种技术参数、适用范围,这样给排水系统投入使用才能稳定、安全、经济。

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原文:
[Abstract] Building water system design is essential in the choice of pumps. To the pump, sewage pumps, fire pump systems in the selection should be based on their respective characteristics and pump parameters, maintenance comprehensive consideration of various factors to determine. [Text] 1 Project Overview   Hangzhou Sunny Hotel is located in the bustling commercial and financial center, is located in the middle of the old city Jiefang east by the railway station, west lake. Building from the ground floor two floors on the ground floor 21, the middle layer 2 layer technology is a set of rooms, recreation, meetings, restaurants, bars as one of the four-star hotel. Construction area of 32000 m2, building height of 75m.   Hotel podium water supply system, the main building water supply systems, underground sewage and waste drainage systems, fire hydrant, automatic sprinkler system designed to meet the use function, the system is more critical in the choice of pump. Pump characteristics, parameters, price, service is directly related to the system in operation when the stability, security and fixed equipment, water pumps one-time investment and ongoing maintenance and maintenance. In the design research process, we have gone through the various pump parameters for engineering analysis and comparison, and practical application of the inspection, the final selection of the DL, QW, XB series pumps. Are designed to use pumps made a little knowledge and experience, for our reference  exam.  2 to the choice of pump   Sunny Hotel lives under the water used to the way upstream, that is municipal water supply network for two-way ring to the ground floor living pond, water pumps were upgraded to skirt the main building roof water tanks, and then gravity flow to various water points. Pump start-stop by the level control instrument to control. Using up to this water way under the roof water tanks have played a role in the middle of regulating water pump to start running  Q ~ H  value is relatively constant,  Q ~ H  value is not with the amount of water the size of the water points, and change the design, select pumps As long as to meet the terms  Q ~ H  value can be. It should be noted chosen pump  Q ~ H  value is not greater than the design and calculation of  Q ~ H  value of a lot of control over the general design calculations should  Q ~ H  value of about 5%. According to the above principles, we design the podium, the main building water supply system pumps selected as 65DL32  15 × 3 and 80DL50  20 × 5-type pumps. The pump parameters in Table 1. The choice of three drainage pump Sunny Hotel 2 underground floors with pump house, air-conditioning equipment room space and laundry rooms, staff restaurants, bathrooms, toilets and other services space. Designed to separate sewage and waste sump set up to collect sewage wastewater submersible sewage pumps were then transported to enhance the outdoor septic tanks and municipal sewer system. To make the basement sewage wastewater discharge flow, the choice to consider when sewage pump underground water, sewage and waste, especially waste material containing more linear. Sewage pump must have a certain amount of suction, tearing linear function of the material, otherwise easily lead to clogging sewage pump, damage to motor. After comprehensive analysis, design, selected 100QW series submersible sewage pump. This series pump has suction 20cm the following linear function of items, and internal automatic probe, can effectively control the overload, leakage, short circuit, especially suitable for pumping sewage and waste basement.   sewage pump selection should consider a pumping time, which related to the sewage pump starts per hour, the number and set the size of the pool volume. Reference to the relevant information to the general sewage pump a suction time of not less than 5min, we will be in the design of sewage pump a suction time as a 10min, sump volume of 5m3. Case, the sewage pump to start at about 2 times / h. Sump depth of 1.2m is generally more appropriate. 4 fire pump selection   Sunny Hotel is a kind of tall buildings, according to "standards for fire protection design of tall buildings" requirement, fire water consumption as follows: a. outdoor fire hydrant  Q  = 30L / s, the fire continued 3h; b. indoor fire hydrant  Q  = 40L / s, the fire continued 3h; c. automatic sprinkler system  Q  = 30L / s, the fire continued 1h.   fire-fighting system of water supply by "high regulation" requirement: "When the hydrostatic pressure is higher than 0.8MPa partition to be taken when the water supply", for the design of water supply used in partitions in parallel.   determined fire-fighting system of water supply, fire system design is the key to the choice of fire-fighting equipment. According to the "high regulation" provides one with a fire pump required to prepare. Such a high fire hydrant zone, the low areas to be set up 4 sets of fire pumps, sprinkler systems of high areas and low areas to be set up 4 sets of fire pumps, two fire-fighting system required to set up eight units high power, high flow fire pump. In the design of research, I found water pump industry introduced a new type of multi-outlet fire pump, the pump also has a low to high areas and water supply capacity, so as long as the choice of four sets fire pump can meet the fire hydrant, automatic sprinkler 2 large-scale systems demand high and low water supply. Access to the fire pump manufacturers export more than the technical parameters, there is a problem confused designer, that is, each building fire ignition location is an unknown, but if a fire occurred in the distinction between high and low boundary layer, the high zone and low-area fire hydrant , automatic sprinkler system while starting sprinkler, fire pump at this time the level of the outlet area at the same time began to water, fire pump flow and head can also meet the design requirements? through to the production of such fire pump manufacturers the technical sector advisory , were not received satisfactory answers. With this confusion producers require a fire pump on the fire pump technical parameters for the boundary layer experiment. January 19, 1998, we design the selected "XB" Multi-fire pump in the export flow, head testing. Before the test set a set of parameters, that is, a separate high-water areas, low-area single outlet, high and low water area at the same time, the test parameters were shown in Table 2.   test data from the above perspective, "XB" series of multi-outlet fire pump  Q ~ H  curve relatively flat, fully able to meet the lower partition at the same time water requirements. Multi-fire pump on the export of high-rise building fire service water supply system of water supply is reliable, the system is economic, it can be said is an ideal fire-fighting water supply system. 5 Summary   building water system design, especially high-rise building water system design, each system has different water pump technology, use requirements. For all systems can be a normal, safe and efficient in operation, water supply and drainage design, pump selection should be considered an integrated pump characteristics, parameters, scope of application, water pump manufacturer's production technology the price of power and water pumps and other factors. Developed for the new pump, in particular, to understand clearly the various technical parameters, scope of application, so that the drainage system put into use to be stable, safe and economical.


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