Rainbow-sucking rainwater (304)Stainless steelI'm not sureWholesaleMarket guilin 5 - arrange for the entry of instruments, instruments, support materials. 4. 4. 1. 1 rainwater pipes shall be installed at the location specified in the design, and the suspension pipe shall be installed at no gradient or level. In order to ensure the generation and sustainability of rainbow drainage, it is required that the entire emission system, from rain-fed to pipeline systems, be integrated and that the components be closely linked. If there is a completely open entrance to the rain, the air will be driven by the current rotation and enter from the entrance and exit into the entire rainwater-emission system, so that it will not be able to form a full-flowing rainbow-emission system, which is no longer a rainbow-emission system, and is actually working as a traditional gravity drainage system. However, in order to achieve a better emission effect, gravity-based emission systems require a smaller slope of 2 per cent for the suspension of pipes. The suspension tube of the rainbow-sorting system is installed at zero slopes, without the force of gravity, and the whole system cannot effectively drain. Therefore, air is effectively prevented from entering the system at any time only when the entrance to the water mouth is semi-open, and when the water depth before the battle meets certain requirements, it can form a water seal that completely separates the air and rapidly creates a rainbow. In addition to ensuring that air access is effectively prevented at the entrance, there is also a guarantee that there is no air access in the system pipeline. Therefore, another requirement is the complete sealing of the system to ensure that the pipeline is not leaked. Because the flow of water within the pipe is a state of pressure flow when the rainbow is inhaled, the walls of the pipe are under pressure, and the vent is similarly under pressure and prone to leakage; on the other hand, if leakage occurs, the state of internal pressure within the tube changes to affect normal rainbow absorption. 4. 3 rainwater drain installation: rainwater carried from the house during the storming of the pressure-flowing house by the technical advantage of the rainwater drainage system is collected along its slopes to the ditch. Traditional rainwater discharges are water collected from the ditches through the rain-drain, the rain-dwelling pipe, the drain pipe to the rain-check well, or through the rain-drying, suspension, rain-dwelling, and drainage pipes to the rain-screen well. The general house drainage system is often divided into an external drainage system and an internal drainage system according to the location of its drainage tube and the drainage system. From a hydraulic point of view, it can be divided into a gravitational stream-side drainage system and a pressure-stream-side drainage system, which emphasizes pressure conditions in the house-side drainage system designed for rainfall intensity. Different house-water drainage systems use different design calculations based on their current status analysis. The traditional water drainage system is designed on the basis of gravity flow. The gravity drainage system is based on gravity. The water drainage situation is free-flowing, with water flowing into the rain pouring into the air to form a mixed stream of water and gas, which is designed to reduce the flow of rain; the requirement for a suspension tube at gravity flow is not greater than 0. 8 degrees of capacity and a slope greater than 5 per cent, and therefore requires large pipes and slopes, which, in order to ensure normal operation of the rainwater flow that is connected to the same suspension, limit the number of connections to no more than four, leading to an increase in the number of roots of the rainwater rise. Gravity-rain drainage systems are limited by their hydraulic properties, resulting in multiple drainage pipes, large pipelines and low drainage capacity, which are more pronounced in large industrial plants and public buildings. Pressure-flowing storm-water drainage systems, the use of compact-flowing rain-water pipes, and a significant increase in drainage capacity, have reduced the number of standpipes and burial pipes that are connected to the suspension pipe without restriction, subject to hydraulic calculations; suspension pipes do not need slopes and are installed in a convenient and beautiful manner; systems can reduce the diameter of the selected pipe by pressure-flow, since the length of the single system's suspension pipe can be up to 150 m, the main tube can be located close to the outer wall, and the building can be built without a well or a pipe, which is particularly suitable for sites where there are many or no wells on the ground inside the building. It can be seen that the system with the advantage of hdpe tubes, which have a clear technological advantage over the flow of gravity, is just beginning to be applied domestically, and has been applied internationally for almost two decades. 1. 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