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Installation of Drip Irrigation with Small-Diameter Emitter Tubes for Fruit Trees

Release Date:

2019-12-04

The construction scope of the subsurface drip irrigation system includes: installation of the headworks; excavation of the main pipeline trench; installation of the main pipeline; installation of lateral pipelines; installation of branch pipelines; and installation of capillary tubes. Headworks installation: installation of a centrifugal screen filter to ensure the cleanliness of irrigation water and prevent clogging. A check valve is installed between the filter’s inlet and the wellhead outlet to prevent backflow after pump shutdown, thereby avoiding fertilizer solution reflux and subsequent groundwater contamination when fertigation is required. A butterfly valve is installed between the centrifugal filter and the screen filter, along with a fertilizer injection tank. Main pipeline trench excavation: the design specifies a trench depth of approximately 1 meter (more than 50 centimeters in northern regions) and a width of 0

Small-tube outflow The system construction scope includes: installation of the headworks system; excavation of the main pipeline trench; installation of the main pipeline; installation of branch pipelines; installation of lateral pipelines; and installation of capillary tubes.

Initial system installation: A centrifugal screen filter is installed to ensure the cleanliness of irrigation water and prevent clogging. A check valve is installed between the filter’s inlet and the well casing outlet to prevent backflow when the pump is stopped, thereby avoiding fertilizer solution reflux that could contaminate the groundwater. When fertigation is required, a butterfly valve is installed between the centrifugal filter and the screen filter, and a fertilizer tank is also installed.

Main pipeline trench excavation: The design requirement for the main pipeline trench is a depth of The trench should be approximately 1 meter deep (with a minimum of 50 centimeters in northern regions) and about 0.3 meters wide to accommodate the installation requirements for antifreeze agents. A dedicated trenching machine must be used for excavation, ensuring that the trench remains straight throughout to provide favorable working conditions for subsequent pipeline installation.

Commonly used in engineering Pipes with diameters of 90 mm or 110 mm serve as the main pipelines, and lock-type pipe fittings are used for pipeline connections. When connecting the underground main pipeline to the underground branch and secondary branch pipelines (which use PE63 pipes), reducing-lock tees are employed; each branch line is equipped with a PVC female-threaded ball valve to control the branch pipeline. The PE63 pipes are laid perpendicular to the fruit tree planting rows, and based on the number of fruit tree rows, long-handled hole-punching tools are used to create openings in the PE63 pipes, followed by the installation of spigot-and-socket bypass fittings.

Branch pipeline installation and capillary tube installation: Selection of branch pipelines For PE20 tubing, lay one PE20 pipe per row of fruit trees. Install the PE20 pipe directly onto the socket-and-spigot bypass fittings, then punch holes in the pipe at the locations corresponding to each tree and install turbulence generators. Attach one end of the drip tape directly to the turbulence generator, and secure the other end at the base of the tree.

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