Super pressure suction joint pumping system and operating method thereof

Abstract

The invention discloses a super pressure suction joint pumping system and an operating method thereof. The pumping system comprises a rainfall tube well, a vacuum pump and an air compressor, wherein the vacuum pump and the air compressor are located outside the rainfall tube well; pumping pipes of the vacuum pump are connected to the inside of the bottom of the rainfall tube well; air compressor pipes of the air compressor are connected to the inside of the rainfall tube well and communicated with the pumping pipes; an exhaust tube is fixed to a well lid of the rainfall tube well; one port of the exhaust tube is formed in the upper portion of the rainfall tube well, the other end of the exhaust tube is located outside the rainfall tube well and split to two branch tubes, one branch tube is provided with a valve A and communicated with the pumping pipes, and the other branch tube is provided with a valve B and communicated with the air compressor pipes. The super pressure suction joint pumping system and the operating method thereof have the advantages that the structure is simple; all mechanical devices are disposed outside the well; installation is convenient and fast; the cost is low; one set of pumping system can drive six to twelve rainfall tube wells at the same time, and the water collecting efficiency and the pumping efficiency of the rainfall tube well can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of deep well pumping, and in particular relates to a super pressure-suction combined pumping system and a working method thereof. Background technique [0002] With the rise of urban high-rise buildings and the development of underground railways, a large number of deep foundation pit projects have been produced. If the groundwater level in the construction area is high, the excavation of the foundation pit will involve the influence of groundwater on the construction of the foundation pit. For the normal operation, it is necessary to take measures to lower the groundwater level. [0003] Traditional deep foundation pit dewatering equipment includes vacuum pumps, submersible pumps, and deep well filters. Usually, one well is equipped with one submersible pump. The submersible pump is often placed below the water surface in the well. As the depth of the well increases, it becomes more and more difficult to p...

AI Technical Summary

Problems solved by technology

[0003] Traditional deep foundation pit dewatering equipment includes vacuum pumps, submersible pumps, and deep well filters. Usually, a well is equipped with a submersible pump. The submersible pump is often placed below the water surface in the well. As the depth of the well point increases, it becomes more and more difficult to pump water.

This technology requires a lot of equipment investment in the early stage. Whether it is installation, inspection or maintenance during operation, the labor cost is very high, and the pumping efficiency is not ideal, and the service life of the equipment is short.

[0004] In the patents ZL200520047130.7 (special equipment for dewatering of deep wells in foundation pits), ZL200610024254.2 (dewatering equipment for deep wells in vacuum foundation pits) and ZL201420570569.7 (dewatering devices for deep wells with negative pressure air jets in foundation pits), at the lower end of the "vacuum water distribution pipe" All are equipped with small holes. In the actual construction process, the relative position of the small hole and the groundwater level needs to be adjusted repeatedly according to the groundwater level, which consumes a lot of human resources.

[0005] However, the patent ZL200620039852.2 (intubation vacuum foundation pit deep well dewatering equipment) avoids the above problems, but the tube well vacuuming efficiency is low, the effect is poor, and the applicability to deep wells over 10m is poor

[0006] Although the above four technologies have improved the traditional downcomer wells, there is still a common deficiency: that is, there are vent holes on the manhole covers of the downcomer wells, so only a limited vacuum can be formed in the downcomer wells, which is relatively poor in permeability. Poor soil layer has very low water collection efficiency

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