关于虹吸排水中关于溢流的探讨
Each flat roof or separate flat
roof section and each gutter must
be equipped with appropriate
emergency overflows, irrespective
of the number of
不管有多少个雨水斗，每个屋顶或独立的平顶部分及每个天沟必须设置适当的紧急溢流口。
Therefore, the drainage type
(negative pressure system or conventional
roof drainage system), has no
influence on the basic
question whether emergency
overflows should be provided.
因此，是否安装紧急溢流口与选择何种排水系统（负压系统或传统重力式系统）无关
Further reasons for the
construction of emergency drainage systems,
especially for negative pressure
roof drainage systems, are
the following:
紧急装置的安装，尤其对于负压屋顶排水系统的具体原因如下：
& Dimensioning of the negative
pressure system does not take into account any country-specific
calculation principles of the downstream non-pressure
负压系统的计算没有考虑到每个国家对下游的非负压系统的计算原则。
Therefore, if the non-pressure
drainage has smaller dimensions,
the discharge capacity might be
因此，如果非负压系统尺寸较小，排水能力可能会降低
& As regular cleaning of the
city-sewer cannot be controlled, obstructions might lead to
rainwater backing up into the roof drainage system.
由于城市下水道的常规清洗是不可控的，管道阻塞有可能会引起雨水回冲
&The roof construction or gutter
have more or less limitations to bear static loads. Therefore, the
danger of collapse due to record precipitations and of water
penetrating into the building is high.
屋顶或天沟对静负荷或多或少都会有限制。因此，仓促计算可能引起的屋顶瘫塌及雨水侵入建筑物的危险性很高
When emergency overflows are
positioned on a roof with a siphonic roof drainage system, the
following measures must be taken into account:
当紧急溢流口与虹吸系统结合使用时，必须考虑到以下几点：
& Emergency overflows must be
positioned in such a way that theydo not obstruct the rainwater
flow between the outlet and the emergency overflow.
安装的紧急溢流口不能阻挡雨水斗与紧急溢流口之间的水流
& The weir must be placed 5 cm
above the rainwater outlet, regardless of the type of emergency overflow used (this also
applies to roofs with vegetation). It must be ensured that there
are no flat
roof edges or roof entryways, etc.
below the emergency overflow level.
无论使用何种紧急溢流口，堰必须高出雨水斗5厘米（也适用于有植被的屋顶）必须保证在紧急溢流口水平线下没有平屋顶边或屋顶入口等。
& The emergency overflow should
always be constructed through the roof balustrade, if possible. If
the roof construction does not allow an unobstructed emergency
overflow through the balustrade, emergency drainage can also be via
another piping system. This piping system should, however, not
be directed to the same city-sewer as the siphonic roof
drainage system but to route this piping system above the ambient
如果可能，紧急溢流口应该总是穿过挑檐。如果屋顶的构造不允许开口的紧急溢流口穿越挑檐，紧急溢流口也可以另接管道。但是此管道系统不应该与虹吸系统排到同一个市政管道井中而是另外排放到地势较高的地方
External emergency overflows
this ensures a faster operating
behavior than a system with round apertures.
紧急溢流口外面应设计成方形，这样能确保比圆形的运行更快
Emergency overflows using another
piping system may, however, also be round (with pipes). In this
case, the inlet funnel should preferably have a round design
当然，用其它管道系统的紧急溢流口也可以是圆的，这样漏斗口也应该是圆的
In general a drainage system in
combination with a overflow system should be able to drain a 100
year rainfall quantity.
通常来说结合有紧急溢流口的排水系统应该能够排出100年的暴雨强度
Geberit method
吉博力的解决方法
Dimensioning of the emergency
overflow for flat roofs
平顶屋顶的紧急溢流口的尺寸计算
An infinite number of
country-specific guidelines and calculation procedures is available
for the dimensioning of emergency overflows. Regardless of these
procedures and taking into account record precipitations and the
gravitational constant etc., Geberit offers an easy way to
calculate the dimensions of emergency overflows by using the
company's empirical values.
在紧急溢流口尺寸的计算方面有很多的国家标准。不管什么规则都会涉及到百年不遇暴雨强度和重力常数等，然而应用吉博力的经验式，我们为大家提供非常简便的计算方法
Total amount of
rainfall in liters / s x 25 cm²
l/sx25 cm²
This dimensioning method ensures
an efficient roof drainage even if outlets are blocked or the
city-sewer is obstructed. Record precipitations (~ rainfall
intensity twice as high as normal ) can thus be handled. Double
rainfall intensity corresponds to a safety factor of 2.0. An even
higher safety factor must be applied to buildings requiring higher
protection (hospitals, theatres,…). (For detailed information, see
EN 12056-3 chap. 4.2.)
该计算方法可以保证甚至在雨水斗阻塞或下水道阻塞的状况下仍能有效排水。这样遇到百年不遇大暴雨（即暴雨强度是平时的两倍）也可以处理。双倍的暴雨强度可以使用安全系数2.0。对于需要特别等级保护的地方（医院，剧院….）可以使用更高的安全系数（详细请见EN1.2章）
Dimensioning of the emergency
overflow in the gutter
天沟中的紧急溢流口的计算
For gutter constructions, the
appropriate arrangement of emergency overflows is equally
important. This especially applies to internal gutters (shed-type
gutters): For this gutter type, emergency overflows can only be
positioned at the two front ends of the gutter. For bracket mounted
gutters, the emergency overflows can be positioned near the outlets
(lowest point of the corresponding gutter
section) as well as at the front
在修建天沟时，恰当地安置紧急溢流口同样重要。尤其是对于内天沟（有棚的天沟）：对于这种天沟，紧急溢流口只能装在天沟的两个末端。对于有支架支撑的天沟，紧急溢流口可装在接近雨水斗的地方（相应天沟的最低点）也可能装在末端。
To guarantee efficient emergency
overflows in accordance with the following dimensioning, the basic
specifications on the use of the siphonic roof drainage system for
gutters must be considered:
为了保证有效的紧急溢流与下面的计算一致，必须考虑虹吸式屋顶排水系统的基本计算规则。
& Maximum distance of outlets 20
雨水斗相隔最大距离为20米
& Minimum gutter width 35
天沟的最小宽度为35厘米
& Gutter slope in the longitudinal
direction 5 mm / m (0.5 %).
天沟的纵向坡度为5毫米/米（0.5%）
Dimensioning of emergency
overflows placed alongside the gutter
安置在天沟旁边的的紧急溢流口的计算
For the dimensioning of emergency
overflows for gutter constructions, the two different arrangements
must be considered. For emergency overflows fixed alongside the
gutter, dimensioning is basically the same as for flat roof
emergency overflows. The only difference is that for gutter
contructions the weir must be placed 10 cm above the
天沟结构的紧急溢流口的计算可考虑两种方式。对于装于天沟旁边的紧急溢流口的计算，基本上与平顶屋顶的紧急溢流口的计算相同。唯一不同的是对于天沟结构的紧急溢流口，堰必须装在雨水斗上方10厘米的地方
Total amount of
rainfall in litres / s x 25 cm²
l/sx25 cm²
The required aperture surface that
has been calculated must be distributed equally among the number of
所计算的孔径表面积必须均匀分布到每个雨水斗
Dimensioning of emergency
overflows placed at the front end of the gutter
安装在天沟末端的紧急溢流口的计算
Notwithstanding any existing
calculation tables and the abovementioned basics on dimensioning,
the following can be said when calculating the front end emergency
overflow aperture:
尽管我们有现成的计算表和上面提及的计算基础，在计算末端的紧急溢流口时还要注意以下几点
& Both front ends of the gutter
must be equipped with an emergency overflow aperture.
天沟的两端必须都要留有紧急溢流口
& These apertures must be mounted
in such a way that the whole gut the top must
be kept open
这些紧急溢流口必须能覆盖整个天沟的宽度并保持敞开
& The weir must be mounted at
least 5 cm and maximum 10 cm above the following outlet aperture
(depending on the distance between the outlet and the front end or
the longitudinal slope).
堰必须装在相邻雨水斗开孔处上方5厘米到10厘米的地方（根据该雨水斗与末天沟末端的距离或纵向坡度而定）
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底滤不打孔，利用虹吸下水效果如何？
这几天准备做个鱼缸,关于底滤方面一直很纠结，不想打孔，总觉得打孔不安全，正好在网上看到这样一个帖子就转过来了，虹吸下水效果如何？相对打孔有什么缺点？请高手指教，也欢迎大家探讨~~
本帖子中包含更多资源
才可以下载或查看，没有帐号？
当水位低于下水位时水会停止流出。当水泵将水从过滤缸不断抽至鱼缸水位会上涨，超过出水口水就会自动流出，水位上涨越快水流会越大。由于虹吸的入水口紧贴缸底，水泵抽进鱼缸的进水口在鱼缸另一侧，水会向主虹吸管流动，加上鱼游水搅动，鱼便即会被主虹吸管吸出，进入过滤盒。
再说一下，如何开机启动。虹吸管能否吸水，主要靠管的密闭，和水的充实。管道一定连接密闭不能漏水漏气，启动前要将管道充满水不能留有气体，将管口封闭。安装到位后，对鱼缸加水至出水管下水位以上，此时打开管口封闭，如果有水流出，即安装成功。然后再封闭出水口，将水加至出水口上水位。打开管道封闭使水流入过滤，待水没过水泵开启水泵。次虹吸管同理，将入水口调整至水面下，打开封闭，有水流出。整个工作完成。
我改动一下，不知道这样是否合理？
本帖子中包含更多资源
才可以下载或查看，没有帐号？
其实打孔还是最安全的，虹吸主要是怕进气
有个乐氏不打孔，楼主可以参考一下
水是一点点的上，上一点你那就流一点，你这只能算溢流，不能算虹吸。
是虹吸没错，管经用粗要不会下不极水
还是用溢流吧，美观、安全。
另外图里缸好脏。
这样不安全，万一虹吸失效，后果很严重~~~~~~~~~~~~~~~
三通上面是开放的，所以这是溢流。
水路先是一小段虹吸，然后真正下水是溢流
安全性有待商榷？！
Powered by鱼缸下滤的虹吸管如何在停电时停止吸水_百度知道
鱼缸下滤的虹吸管如何在停电时停止吸水
过滤缸放一个泵向鱼缸供水。如果停电了我打算做一个鱼缸下滤，请问如何让虹吸能够自动停止呢。免得把鱼缸水全部吸干，利用虹吸从上面的鱼缸向下面的过滤缸里送水
提问者采纳
hiphotos.jpg" esrc="http./zhidao/pic/item/0ec895eb73f公分间隔 这样鱼缸里的水溢过黑色玻璃再流进间隔再溢过红色玻璃就可以通过缸底进水孔排到底滤缸了 当停电时鱼缸水位渐渐降低直至与红色玻璃平齐时就不再溢过排进下水口了 这样子懂了吗 还不懂的地方随时欢迎你继续发问<img class="ikqb_img" src="/zhidao/wh%3D450%2C600/sign=cd423c81a3ec08fa26551ba36cde115b/0ec895eb73fb
我的成品缸底下没眼的。所以我自己做个虹吸管。从上面走
管道的话我不太能理解 感觉原理跟上面图纸差不多 你可以参照这个图纸做一个尝试一下
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水泵在有水的情况下负载不出水转动、如果上水管串连了紫外线灯，水泵空转损坏，可在底缸设置浮球阀，上述方法也不能用，这样就不会损坏水泵，但这些设备将在无水水状态下工作，当底缸达到设定水位后下水管被关闭，复电后。2、建议改造成溢流式底滤更安全1、当然也可以在底缸再为上水管设置浮球阀、冷水机等设备，因为复电后虽然水泵不空转，这是有隐患的。5。3，那么底缸会被抽干，当底缸下降到设定水位后上水管被关闭、你还应该担心电源恢复后虹吸是不会自动恢复的，4、担心停电后虹吸把水吸干
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