Songjiang axial expansion bellows pump house site in Yuhang District, Hangzhou

The official website of Shanghai Songjiang shock absorber Group Co., Ltd. introduces you: the site information of Songjiang group axial expansion bellows and Hangzhou Yuhang District pump house. Our factory provides high-quality axial expansion bellows for many non negative pressure water supply equipment, which plays the role of shock absorption and noise reduction, and makes the community environment more quiet and comfortable.

Introduction to Yuhang District, Hangzhou:

Yuhang District, subordinate to Hangzhou City, Zhejiang Province, is located in the East, West and north of Hangzhou city. It is located at the south end of Hangjiahu Plain and Beijing Hangzhou Grand Canal. It is the center of the Yangtze River Delta and the site of Liangzhu ancient city, the “holy land of Chinese civilization”. Yuhang District covers a total area of 940 square kilometers and governs 7 streets and 5 towns [50]. According to the data of the seventh census, as of 0:00 on November 1, 2020, the permanent resident population of Yuhang District is 1226673.

Yuhang District is located in the transition zone between Hangjiahu Plain and hilly and mountainous areas in Western Zhejiang. The terrain tilts from northwest to Southeast, roughly bounded by Tiaoxi in the East, and mountainous and hilly areas in the northwest. It belongs to the remaining vein of Tianmu Mountain. Most of the peaks above 500 meters above sea level are here. The eastern part is the accumulation plain, with low and flat terrain and scattered ponds. It is the famous Hangjiahu water network plain, with an altitude of only 2-3 meters. The southeast is a beach plain, in which solitary hills stand, and the terrain turns slightly high, with an altitude of 5-7 meters. The landform is divided into four types: mountain, hill, plain and beach, including nine units: middle mountain, low mountain, high hill, low hill, valley, valley plain, water network plain, beach plain and Qiantang River water area. The plain area accounts for 61.48% of the total area of the city.

Introduction to secondary water supply of pump house:

Secondary water supply refers to the form in which units or individuals store and pressurize the water supply of urban public water supply or self built facilities, and then supply it to users or self use through pipelines. The secondary water supply is mainly established to compensate for the lack of pressure of municipal water supply pipelines and ensure the water use of people living in high-rise buildings.

Whether the secondary water supply facilities are constructed, designed and constructed according to the regulations is directly related to the quality, pressure and safety of secondary water supply, and is closely related to the normal and stable life of the people. Compared with raw water supply, the water quality of secondary water supply is more likely to be polluted.

When the non negative pressure water supply equipment is normally put into use, the water of the municipal pipe network enters the non negative pressure steady flow tank, and a large amount of air in the tank is discharged from the exhaust valve. When the air is exhausted, the floating ball in the valve is lifted by removing water, the transmission plug is turned to the closed position, the exhaust port is slowly closed, and the exhaust is stopped to prevent water from flowing out. When the water flow in the steady flow tank is normally transmitted, if a small amount of air accumulates in the valve to a certain extent, the water level in the valve drops, and the floating ball drops with it. At this time, the air is discharged from the exhaust hole. During the normal operation of the non negative pressure water supply equipment, when the water supply of the municipal pipe network is insufficient, the water in the municipal water inlet pipe is empty, or the water pressure in the steady flow tank is lower than the atmospheric pressure, the water level in the steady flow tank drops, the floating ball drops, drives the plug to open and inhales air, so as to maintain the atmospheric pressure in the steady flow tank without generating negative pressure on the municipal pipe network.