An overflow pressure regulating tower and a pressure regulating method for an ultra-long gravity flow water delivery system

Abstract

The invention provides an overflow pressure regulating tower suitable for a super-long gravity flow water delivery system, which includes a drainage vertical pipe, a connecting horizontal pipe, a top connection groove, an overflow weir, and a drainage vertical pipe; the drainage vertical pipe includes an inflow Vertical pipe and outlet vertical pipe, the bottom of the inlet and outlet vertical pipes are respectively connected to the upper and lower water pipes; the connecting horizontal pipe connects the middle and upper parts of the inlet and outlet vertical pipes, and is used for the steady-state process with low water level flow; there is an overflow weir in the top connection groove, which is divided into a drainage area and an overflow area. The drainage area connects the top of the inlet and outlet vertical pipes, and is used for the steady-state flow with a high water level. The weir is used to control the maximum water pressure, and the overflow area is provided with a vertical drainage pipe to discharge the overflow water. In the transition process, the present invention prevents pipe burst caused by boosted water level through the overflow weir, blocks the propagation of depressurized water hammer by connecting horizontal pipes; overflows to control the maximum water hammer pressure, and separates the system to control the scope of the accident; both It can enhance the safety of the system and greatly reduce the cost of pipeline engineering.

Description

technical field [0001] The invention belongs to the technical field of water delivery in hydraulic engineering, and relates to a safety accessory for water delivery, in particular to an overflow pressure regulating tower and a pressure regulating method for an ultra-long gravity flow water delivery system. Background technique [0002] Ultra-long-distance gravity flow water delivery system, that is, a pipeline system with a length of hundreds of kilometers and water delivery through the gravitational potential energy of water. The driving head is the water level difference between the inlet and outlet, and the energy is mainly consumed by the resistance along the way. During the transition process, if the water delivery system is shut down in an emergency, the water hammer pressure in the system rises rapidly and spreads rapidly. If the maximum pressure exceeds the pressure limit of the system, a pipe burst may occur; in order to prevent pipe burst, the system pipeline pressu...

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Problems solved by technology

[0004] However, although the conventional overflow surge tank can control the maximum water hammer pressure, it cannot control the scope of the accident when a pipe burst accident occurs somewhere in the system, because the depressurized water hammer can spread to other parts of the system through its bottom

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