2010-06-07 09:19:17 阅读4 评论0 字号:大中小
原文:
稳压泵是消防泵的一种,用于自动喷水灭火系统和消火栓给水系统的压力稳定,使系统水压始终处于要求压力状态,一旦喷头或消火栓出水,即能流出满足消防用水所需的水量和水压。稳压泵和增压泵,尽管都是增压设施一种,稳压泵运行在喷头和消火栓未曾出流时,增压泵工作在喷头和消火栓已经出水,而消防用水的水压不足,需增加水压时。 关键词:稳压泵 流量 稳压泵是消防泵的一种,用于自动喷水灭火系统和消火栓给水系统的压力稳定,使系统水压始终处于要求压力状态,一旦喷头或消火栓出水,即能流出满足消防用水所需的水量和水压。稳压泵和增压泵,尽管都是增压设施一种,稳压泵运行在喷头和消火栓未曾出流时,增压泵工作在喷头和消火栓已经出水,而消防用水的水压不足,需增加水压时。 我国现行规范《高层民用建筑设计防火规范》(GBJ50045-95)(以下简称《高规》)对增压设施(其中包括稳压泵)有以下规定:“7.4.8.1 增压水泵的出水量,对消火栓给水系统不应大于5L/s,对自动喷水灭火系统不应大于1L/s。”这个规定是有前提的,条件之一是消防给水系统无气压水罐;条件之二是室内消防给水系统的小量渗漏主要在水泵的密封部位。条文的规定并不意味着在任何情况、任何条件、任何时候稳压泵都按这个流量确定。 《高规》所指的增压水泵,既指增压用的增压泵,也指稳压用的稳压泵,规范条文未予区分,而实际上增压泵和稳压泵在作用和功能上有所区别,其流量值也不相同。 增压泵用于喷头和消火栓已经出流,而消防用水的水压不足,需增加水压才能满足消防用水的水压要求。其时,增压泵的流量应保证一个喷头或一个消火栓的出流量,即不小于1L/s或5L/s。但增压泵一经启起,消防主泵随后也随之启动,增压泵的作用显得并不十分迫切和必要。 稳压泵不同于增压泵,系用于使自喷淋系统和消火栓系统始终处于要求的压力工况条件,一旦出流即能满足消防用水所需的水压和水量要求。其作用是十分明显的,因此规范所指的增压水泵,实质上是指稳压泵,尤其是自动喷水灭火系统的稳压泵 稳压泵的流量值决定于诸多因素,其中较主要的因素有: 1、系统的类别 当稳压泵用于自喷淋系统时,考虑一个喷头的水量;而用于消火栓系统时,考虑一个消火栓的水量。 2、有无气压水罐配套设置 无气压水罐配套设置时,稳压泵的流量按不大于一个喷头或一个消火栓的水量计算。有气压水罐配套设置时,系统的水量补充和压力保证是靠气压水罐来实施的,稳压泵的流量只需满足气压水罐对流量的要求,即稳压泵的流量应考虑气压水罐的调节容积的因素。此时,稳压泵流量应按气压给水设备罐内空气和水的总容积和罐内水的容积计算公式计算确定。水泵出水量应为当罐内为平均压力时,不小于管网{zd0}小时流量的1.2倍。 《高规》条文并无气压水罐必须配置的规定,但无气压水罐,稳压泵启动频繁,容易损坏;有气压水罐,稳压泵启动频繁问题可以得到缓解,系统的稳压工况的保证能得到更好的体现。但需增加气压水罐的费用,一般情况配套设置的气压水罐容积毋需过大,容积以小于50L为宜。上海市已编制稳压泵配套设置气压水罐的标准图集,由上海海鹰机械厂编制。 3、系统范围 设有稳压泵的准高压给水系统(或称稳高压给水系统),其范畴有在室内的,也有室内和室外的。室内准高压给水系统,管材采用钢管,接口采用螺纹、法兰或焊接连接,管网系统的渗漏主要发生在水泵的密封部位,其数量相对而言是有限的。而室内外准高压给水系统,由于室外管材采用铸铁管,接口采用承插式连接,接口密封采用橡胶圈,管网的范围较大,接口渗漏在整个渗漏量中占有相当比重。管道施工后随即进行回覆土,有时接口部位用混疑土围护加固,即便有渗漏,也很难采取补救措施。凡此种种都说明室内外采用准高压给水系统时,稳压泵的流量应留有足够的余地。 总的来说,稳压泵的流量应根据不同情况作相应的调整。
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译文:
Regulators pump is a fire pump for the sprinkler system and fire hydrant water supply system, pressure stability, the system pressure is always at the required pressure on the state, once the water sprinkler or fire hydrants, which can fire out of water required to meet water and water pressure. Regulators pumps and booster pumps, although facilities are a kind of supercharged, Regulators pump nozzle and hydrant did not run out of stream, the booster pump has been working in the water sprinklers and fire hydrants, and fire water pressure is insufficient, when water pressure increases. Keywords: pump flow regulator Regulators pump is a fire pump for the sprinkler system and fire hydrant water supply system, pressure stability, the system pressure is always at the required pressure on the state, once the water sprinkler or fire hydrants, which can fire out of water required to meet water and water pressure. Regulators pumps and booster pumps, although facilities are a kind of supercharged, Regulators pump nozzle and hydrant did not run out of stream, the booster pump has been working in the water sprinklers and fire hydrants, and fire water pressure is insufficient, when water pressure increases. In our regulation, "fire protection design of tall buildings" (GBJ50045-95) (hereinafter referred to as "high regulation") of the pressurized facilities (including pump regulator) has the following provisions: "7.4.8.1 booster pumps out water, on the Fire Hydrant System should not exceed 5L / s, on the automatic sprinkler system should not be greater than 1L / s. "premise of this provision is one of the conditions is no pressure fire water tank; Second, conditions fire service water supply systems, mainly in small water pump seal leakage site. Provisions does not mean that in any case, any condition, any time, by the flow regulator pump are determined. "High regulation" within the meaning of the booster pump, booster pump using both a supercharger, also refers to the pump regulator with the regulator, regulate the provisions were not distinguished, and in fact the role of booster pump and pump and regulator functions differ, the flow value is not the same. Booster pump for the sprinklers and fire hydrants have a flow, and lack of fire water pressure, water pressure required to increase the water pressure to meet fire safety requirements. That time, the booster pump flow should ensure that a sprinkler or a fire hydrant in the flow, that is not less than 1L / s or 5L / s. However, once Kai from the booster pump, fire main pump also will start later, booster pump function seems not very urgent and necessary. Regulator is different from the booster pump, are used for making self-spray system and hydrant system at the required pressure of always working conditions, once the water flow that is required to meet fire and water pressure requirements. Its role is very clear, so standard booster pumps referred to, in essence, is the pump, in particular, the regulator sprinkler system pump Regulators pump flow value determined by many factors, the more significant factors are: 1, the system type When the regulator from the spray pump for the system, consider a spray of water; used for fire hydrant systems, consider a fire hydrant in the water. 2, with or without pressure tank complete set No pressure tank complete set, the flow rate regulation by not more than a water sprinkler or a fire hydrant in the calculation. A pressure tank complete set, the system guarantees the amount of water added and the pressure is to be implemented by air pressure tank, pump flow regulator pressure tank just to meet the requirements of the traffic that regulators should consider the air pressure pump water flow tank volume adjustment factors. At this point, the pump flow should be regulated pressuretank water supply equipment, the total volume of air and water and tank water volume calculation formula determined. Pump out the water should be an average pressure when the tank is not less than the pipe network 1.2 times the maximum hourly flow. "High regulation" provision does not pressure tank must be configured to the requirements, without the pressure tank, regulator starts the pump frequency, easy to damage; a pressure tank, pump start frequency regulator problem can be eased, the system of regulation works state of expression guaranteed to be better. But the need to increase the cost of air pressure tank, in general, matching set without too much pressure tank volume, the volume to less than 50L is appropriate. Shanghai has been supporting the preparation of regulator set pressure tank pump standard atlas, compiled by the Shanghai Seahawks Machinery Factory. 3, system-wide Quasi-high-pressure pump with regulated water supply system (or stable high-pressure water supply system), its areas are in the room, there are indoor and outdoor. Indoor quasi-high-pressure water supply system, pipe by pipe, interface with threaded, flanged or welded connections, pipe network system leakage occurs mainly in the pump seal parts, their number is relatively limited. The quasi-high-pressure water supply system inside and outside, as outdoor pipe cast iron pipe, interfaces with socket-type connection, the interface seal rubber ring, a larger range of pipeline network, interface leakage in the leakage a significant share. To reply immediately after pipeline construction soil, sometimes with mixed interface, the suspect parts of reinforced earth retaining, even if there is leakage, it is difficult to take remedial measures. All these shows indoor and outdoor use standard high-pressure water supply system, the regulator pump flow should be adequate scope. In general, the flow rate regulator should be adjusted accordingly in different circumstances