Siphon drainage tube is an ancient human invention, as early as the 1st century BC, some people create a unique siphon drain. In fact, siphoning is not entirely caused by atmospheric pressure, and siphoning can occur in vacuum. The force that raises the liquid is the cohesion of the molecules between the liquids. In the event of a siphoning phenomenon, since the liquid flowing out of the tube is more than the liquid flowing into the tube (higher than the water surface), the pressure on both sides is unbalanced, so the liquid will continue to flow in one direction. Siphon drainage pipe system is different from the traditional gravity drainage system, can be immediately removed landed on the roof of a building rain, snow, avoid the formation of stagnant water pose a threat to the roof of the roof, or rain to avoid flooding, roof leaks and other incidents of flooding. How is the siphon drain designed? What's the magic of the siphon drain design? Let's explore the principles of siphon drain design together with everyone to try to learn the practical steps of designing a siphon drain. Siphon drain design 1, siphon rain bucket design The main difference between the gravity drainage rainwater bucket and the siphonage rainwater bucket is that an air baffle is installed in the rainwater bucket. Air baffles are stacked and have no through holes. The design of the roof joints, the waterproof layer, and the leaf cover are all based on conventional thinking. The combination of the diameters of the rain body, the air baffle, and the outlet is a guarantee of a stable function under any flow conditions. This combination is theoretically difficult to optimize and must be tested through a large number of tests and conclusions. 2, system piping design Pipe systems that must meet the local national regulations and can resist positive and negative pressure can be used for the siphon drainage system. For example, ABS, PVC, HDPE, PP, copper pipes, steel pipes and cast iron pipes have been successfully used in UV systems. Different plastic pipes have different resistance to negative pressure. The difference in material quality, wall thickness and pipe diameter determines this ability. Pipeline systems are generally selected based on the actual conditions of the project and require comprehensive consideration of applicability, drainage capacity, durability, rigidity, fire resistance, noise, insulation, cost, and installation costs. 3, related design points: (1) Rainwater bucket selection A flat-bottomed metal rainwater bucket is used to ensure the anti-aging performance and anti-leakage performance of the rainwater bucket under long-day sunshine. The flat-bottom rainwater bucket guarantees simple and safe construction. Since the gutter has both outer and inner gutters, the patented flat-bottom rainwater bucket is installed on the concrete roof, which is simple and rapid and can effectively prevent water leakage. According to the structure of the building's roof structure, the siphon rainwater bucket used in this project is: The discharge volume of siphon rainwater bucket is generally 20 l/s to 40 l/s. When selecting the rainwater bucket, the design displacement should be 70~80% of the maximum displacement. design. Compared with gravity flow systems, reducing the size and number of gutter openings also reduces possible leaks and saves construction time; siphon systems are mostly tandem systems, and the roof is drained to the gutter or catchment point through building slopes. When the rainwater bucket is partitioned on the same roof, the calculation system is based on the same elevation (construction error, the elevation of each rainwater bucket in the same system on the same roof must be within 50mm, otherwise the system calculation is invalid, the system is destroyed), on the other hand, the system calculation At the same time, we must also control the water depth before the bucket. If we can't control the water discharge and the water depth before each bucket, we will make the system unbalanced. Only careful calculations can ensure that the depth of water in the roof is reduced and the drainage effect is better. Some systems use different levels of roof rainwater system access to achieve fast, safe drainage. Under the premise of sufficient discharge of rainwater buckets, accurate calculations can be used to ensure the rapid formation of water discharge and siphon. (2) Pipes The selected pipe and interface must be able to meet both positive and negative pressure needs. The choice of pipe can be divided into the following categories: HDPE pipe: plastic pipe, low cost, smooth inner wall, good hydraulic conditions, simple construction, hot-melt welding. Plastic-coated steel pipe: steel-plastic composite pipe, high cost, good steel, fireproof performance, smooth inner wall, good hydraulic conditions, long service life, flat plate clamp or flange connection. Galvanized steel pipe: ordinary steel pipe, high cost, good steel, fire performance, long service life, the use of groove clamp connection. Stainless steel pipe: high-grade drainage steel pipe, the highest cost, good steel, fire performance, long service life, using sub-arc welding or electric welding connection. 4. Main points of hydraulic calculation of siphonic roof drainage system: (1) The design flow rate of the pipeline is not less than 1 m/s. (2) The total head loss of the drain pipe should be less than or equal to the geometric height difference between the top surface of the rainwater bucket and the critical point, and the pressure surplus ΔPr ≤ 100mbar should be obtained. (3) The siphonic roof drainage system is where the large negative pressure value intersects the suspension pipe and the main riser. The negative pressure at this point should have different limits depending on the pipe. For drainage systems using cast iron and steel pipes should be less than 900 mbar; for plastic pipes, the pipe diameter De50-De160 should be less than 800 mbar, and the pipe diameter De200-De300 should be 450 mbar. (4) The pressure difference calculated from different branches of each node of the siphonic roof drainage system is not greater than 150 mbar. (5) The siphonic roof drainage system uses a flexible drainage cast iron pipe or steel pipe and high-density polyethylene pipe coated on the inner wall. The corresponding calculation chart should be used to calculate the head loss along the pipeline. Siphon drainage pipe specifications The syphon drainage system is currently based on hdpe pipe, the main specifications are mainly 20,25,32,40,50,63,75,90,110,125,140,160,180,200,225, 250, 315, 355, 400, 450, 500, etc., outer diameter unit mm, in addition to large diameter such as 630, 710.800, 900, 1000, etc., but these large diameter is generally used in the siphon drainage system. Siphon drain prices Siphon drain prices are around 100 yuan a meter. For more details on the prices, please refer to the local distributors! Siphon drainage pipe manufacturers Shanghai Shuangbei Building Materials Co., Ltd. main products are pe pipe, hdpe drainage pipe, Shanghai ppr pipe, HDPE siphon drainage pipe, HDPE siphon drainage system, has many years of pipe sales and installation experience. Has a high reputation in the Shanghai pipeline industry, Participated in the construction and supply of many key projects. The major advantage of the drainage system of the siphon drainage pipe produced by Shanghai Shuangbei Building Materials Co., Ltd. is that the common double-corrugation structure effectively improves the external pressure strength of the product, and the drainage system will not be affected by external pressure deformation and affect the drainage effect. Siphon drain installation knowledge 1, according to the requirements of the drawings, combined with the actual situation, according to the measurement of the location of the reservation mouth, drawing processing sketches. 2, according to the sketch of a good pipe size, broken pipe. Fracture should be flush, use a trowel or scraper to remove the inside and outside of the fracture, the outer edge of the angle of 15 °C. 3, before bonding, deal with the socket first insert the test, not all inserted, generally 3/4 depth of the socket, after the test is qualified, use cotton cloth to wipe the water and dust of the socket joint to be clean. If oily, acetone is needed to remove it. Apply the adhesive with a brush, apply the socket, and then apply the socket. Immediately insert it with force. When inserting the adhesive, slightly rotate the socket to facilitate the even distribution of the adhesive. The adhesive can be firmly bonded for about 30-60 minutes. 4. When the drainage pipeline is installed, temporary lead wire hanging can be used for pre-installation. Adjust the coordinates, position, pipeline elevation and slope of the dumping hole to meet the design requirements for bonding, and timely correct the coordinate position and elevation gradient of the dumping mouth. After the adhesive is cured, install the support but do not clamp it tightly. When using metal brackets, rubber gaskets must be placed in contact with the outside diameter of the pipe. 5. The minimum level and the highest level of the drainage riser shall be provided with inspection openings. The center of the inspection opening shall be 1.0 m above the ground. 6. After the pipeline is installed, the pipeline should be plugged in a timely manner, and the module should be blocked according to the specifications. After installation, the pipeline must not be climbed or used for other purposes. Note: The pipe should be installed according to the position specified in the design. The hanging pipe should be installed horizontally without slope. The connecting elbows of the horizontal and vertical pipes, risers and discharge pipes use two 45° elbows or 90° elbows with R≥4D. Editing Summary: Through the explanation of the above content, I believe that everyone already knows the installation method of siphon drains. Do not underestimate the installation of a drain pipe. If the installation is not in place, water may not be drained properly, and jamming will occur. The situation on the ground, so that the installation of the drainage pipe must be careful, pay attention to some details of the operation, in order to ensure the smooth installation of the drainage pipe without accidents. In life, we must be rigorous and serious about everything we do. Only in this way can we do everything well. Siphon principle
Litsea cubeba Essential Oil is used in countless products that commonly has been used in repelling insects. Also many people enjoy its aroma therapeutic uses and place the Litsea cubeba oil in a diffuser to lighten and energize the air.
Litsea Cubeba Essential Oil,Natural Litsea Cubeba Essential Oil,Pure Litsea Cubeba Essential Oil,Organic Litsea Cubeba Essential Oil Xinhui Gangzhou Flavors&Fragrance Co.,Ltd , https://www.xhgzff.com
