文档介绍：箱式无负压供水设备较之罐式无负压供水设备的优缺点
无负压给水设备是利用市政管网的压力,供水设备在市政管网上直接吸水供给用户的供水机组;采取保护措施,确保管网并不产生负压,在保证市政管网供水不受影响的前提下,利用市政管网余压供水,节约供水设备的能耗。无负压供水设备在现在的城市供水中应用越来越多,起到了很好的节约能源的效果。
No negative pressure water supply device is the use of municipal work pressure water supply equipment in water supply user's water supply unit directly on the municipal work; Protection measures, to ensure that the pipe does not produce negative pressure, in ensuring the municipal work under the premise of water supply is not affected, with more than municipal work pressure water supply, save energy consumption of water supply equipment. No negative pressure water supply equipment more and more applied in the present urban water supply, has played a very good energy saving effect.
前些年由于担心直接在市政管网上吸水对城市供水管网的影响,无负压供水设备一直没有得到很好推广,在北京等试点城市采用无负压设备后,无负压供水设备的防止供水二次污染、节约能耗的优点得到了认可,并且随着管理的完善,各地供水部门制定了无负压设备准用的条件,也保证了城市管网供水的安全。
In previous years because of concerns that directly on the municipal work water influence on urban water work, with no negative pressure water supply equipment has not been very good promotion, after the pilot city with no negative pressure device such as Beijing, no negative pressure water supply equipment to prevent secondary pollution, saving energy consumption of water supply advantage is gaining recognition, and with the improvement of the management, around the equipment without negative pressure water supply departments to formulate and apply mutatis mutandis, also ensure the safety of city work water supply.
1. The tank with no negative pressure water supply equipment
罐式无负压设备是普遍采用的供水设备,设备的供水原理如下:
Tank water supply equipment without negative pressure device is widely used, equipment supply principle is as follows:
主要由供水泵组、稳流装置、倒流防止器、控制装置、负压消除器等部分组成,其工作原理是在管网压力允许的情形下直接从管网吸水,利用市政管网的压力,节约能源。无负压供水设备吸水量小于管网供水能力时,并不会造成管网压力的降低,但在用水高峰时段,水泵的吸水量大于管网供水量时,市政管网压力降低,造成稳流器内压力也相应的降低,当稳流器的压力降至低于大气压力时,稳流补偿器上部的负压防止器打开,水泵从稳流器内吸水,此时稳流器和大气连通,相当于一个小的盛水容器。在此条件下,无负压供水设备并不能利用管网的供水压力