Discussion on water supply and drainage design of buildings?

Due to the rapid development of modernization and the deepening of urbanization in China, the production and life of human beings cannot be separated from the supply and discharge of boiled water. Although the proportion of building water supply and drainage engineering in the whole building project is not large, it is closely related to people's lives. Therefore, it is particularly important to study the design ideas of building water supply and drainage, and it will be the general trend to create new energy-saving, water-saving, safe and reliable water supply and drainage systems and design methods. This is of great practical significance to ensure the safety and economy of the daily operation of the whole building and improve the efficiency of the whole building and the quality of human production and life.

1, the role of each link in building water supply and drainage design

1. 1 water supply design

1) automatic exhaust valve. Automatic exhaust valves are usually used in the water supply system of squat toilets with time-delay self-closing valves, such as office buildings, schools, hotels and so on. The automatic exhaust valve at the top of the pipeline system is best installed at the highest point of the pipeline. The delayed self-closing valve can control the flow well, but it can't control the airflow. When the system stops supplying water, a large amount of air usually accumulates in the water supply pipe. The air from the restored water supply pipeline will be compressed to the top of the water pipe system to form a compressed air area. At this time, if someone presses the button of the delay self-closing valve again, the dirt in the toilet will be brought to the ground with the airflow or the stains will splash on the user.

2) Outdoor control valve. It is necessary to appropriately add outdoor control valves to single buildings. Water supply valve at the bottom of neutral pipe in residential water supply design. After adding this measure, residents at the bottom can close the main water supply valve in time when they find that the sewer pipe is blocked, effectively reducing sewage discharge.

1.2 drainage design

1) cooperation between floor drain and trap. Although there is no clear stipulation in the design of building drainage that the drainage floor drain must be provided with a trap, it does affect the use of users to some extent. Therefore, the matching problem between floor drain and trap should be properly handled in the design. Although the height of water storage part is stipulated in the national general water supply and drainage standard drawing, it often fails to meet the design requirements during installation. Therefore, in general, the floor drains of building drainage systems exist indoors, and traps should be installed to effectively prevent the odor problem of indoor drainage systems.

2) Minimum diameter of indoor drainage pipe. Through experimental demonstration, it can be seen that the minimum diameter of indoor drainage pipe should be DN75. The use of this size of drainage pipe will not increase the cost and occupy space, and is also conducive to later maintenance. Dg 150 pipe diameter should be adopted for horizontal drainage pipes at the bottom of buildings, which will neither increase investment nor greatly reduce the risk of pipeline blockage, and is very suitable for China's national conditions. Through reasonable setting, it can achieve the dual effects of practicality and space saving.

2. Problems and suggestions in building water supply and drainage design.

The buildings in Chinese cities have the characteristics of large area, many electrical equipment, high power supply requirements and concentrated personnel, which all put forward high requirements for the safety and reliability of building water supply and drainage design. Therefore, it is very important to solve the problems that are easy to occur in the design of water supply and drainage in buildings and adopt reasonable schemes for optimal design. The following is a detailed discussion and research on several problems and suggestions in building water supply and drainage design for reference by peers.

2. 1 Detailed drawing of building water supply and improvement scheme

Building water supply design is an important part of the whole water supply and drainage design. In the following, the effective improvement scheme is put forward for the details of pipeline noise reduction design, pipe selection, sanitary protection of drinking water pool, branch pipe layout and laying in building water supply design.

Noise reduction design of 1) pipeline. With the continuous improvement of people's living standards, many families want to design double bathrooms, and the demand for decompression and noise reduction of water supply pipes is becoming more and more urgent. In addition, in order to avoid noise at the end when using water, it is recommended to use DN25 for domestic water pipes when the distance between kitchen and toilet is far and the pipe section is long.

2) Selection of water supply pipe. Traditional water supply pipes are mostly galvanized steel pipes, which are easy to rust and have short service life, and the domestic water transportation can not meet the water quality hygiene standards. Therefore, in order to meet the standard requirements, the best and best quality water supply pipes should be selected. Compared with metal pipes, plastic water supply pipes have more obvious advantages. Generally speaking, plastic water supply pipes are not only light in weight and good in compressive strength, but also convenient to install, save steel and energy and have long service life. Therefore, the Ministry of Construction should vigorously promote the use of plastic water supply pipes.

2.2 Common failures of building drainage system and countermeasures

1) floor drain water seal treatment. In the Code for Design of Building Water Supply and Drainage, it is clearly stipulated that the depth of floor drain water seal of building drainage system should not be less than 50 mm to prevent harmful gases from entering the room and polluting the indoor environment. Therefore, it is suggested to use high water seal for floor drain treatment to better meet the design and construction requirements.

2) Noise of plastic drain pipe. At present, the traditional drainage cast iron pipe can not meet the requirements, and now the drainage plastic pipe is widely used. However, because some ordinary plastic drainage pipes are noisy, residents can obviously feel the noise of the canals.

3) Sewage drainage pipes are discharged on the same floor. The drain pipe of the kitchen sink can be directly connected to the vertical pipe of the drainage floor, and the floor drain cannot be located in the kitchen. In the sunken toilet with waterproof layer design, the horizontal drainage pipe is arranged on this floor to solve the blockage and leakage of the lower pipeline of this floor.

3. Conclusion

In the new century, the theme of building an economical and environment-friendly society has penetrated into all fields of society and people's lives. Architectural water supply and drainage designers must keep pace with the times, keep pace with the times, face up to new situations and problems, and dare to challenge. Specifically, it is necessary to strictly control all the details of the design process, constantly sum up experience from work practice, constantly study new situations, solve new problems, and constantly improve design technology, so as to better adapt to the new requirements of today's booming construction industry for building water supply and drainage design and realize a comprehensive, balanced, pragmatic, safe and sustainable development strategy.

I believe that after the above introduction, everyone has a certain understanding of building water supply and drainage design. Welcome to Zhong Da for more information.

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