Jiangsu University

Junping Liu

Shouqi Yuan

Xingye Zhu

Hong Li

Kun Tian

Jinghong Wan

Ya Bao

Xingfa Liu

Fordjour Alexander

Jianyuan Jiang

Yangfan Li

Xinjian Wang

Keji Lu

Qian Zhang

Qingsong Liu

A pressure self-controlled irrigation and pesticide application sprinkler for a micro-irrigation system, the sprinkler mainly including a sprinkler body, a sprinkler cap, a spring sleeve, flow guide holes, a spring washer, a mist spraying nozzle, a rotary acceleration chamber, a compressible spring, arc-shaped flow passages, a thread, a deflection surface, an engagement recess, flow guide slots, a connecting rod movable hole, and a connecting rod. The sprinkler is configured as a double-flow-passage structure. The sprinkler body is provided therein with the spring sleeve and the spring washer. Water flow pressure is controlled to push the spring washer to drive the spring sleeve to move vertically, thereby achieving the switching between two operating modes, i.e., irrigation and mist spraying.

Pressure self-controlled irrigation and pesticide application sprinkler for micro-irrigation system

A water-fertilizer-pesticide integrated multifunctional irrigation spray head, mainly including a first spray hole, a second spray hole, a spray head cap, a spray head body, an atomization core, water passing holes, springs, cover sheets, a pipe connector, water outlet holes, a throat cavity, a chamfered groove, and a helical groove. The spray head is configured as a double-flow channel structure. The spray head body and the atomization core are provided in the spray head cap. The atomization core is provided in an inner cavity of the spray head body and is threadedly connected. The bottom of the spray head body is provided with cover sheets, each of the cover sheets is connected by a respective one of the springs. When the working pressure is a low pressure, the cover sheets are in an open state, and the liquid is sprayed by means of two flow channels.

Water-fertilizer-pesticide integrated multifunctional irrigation spray head

Disclosed is a method for calculating instantaneous sprinkler strength comprising: ensuring that a translational sprinkler () maintains a stable operating state, placing b rain barrels () at a distance of a metres from the translational sprinkler (), and moving the translational sprinkler () to obtain measurement data; calculating movement time, and the average sprayed water depth received by the rain barrels (); assuming the distribution form of the amount of water of the translational sprinkler (), establishing a function relationship between an instantaneous sprinkler strength ht and the movement time t, and calculating a variable in the function relationship; and substituting into the established function relationship a specific numerical value of an instantaneous point in time t of the movement of the translational sprinkler (), so that the value of ht obtained is a numerical value of the instantaneous sprinkler strength of the translational sprinkler (). The calculation method has a simple operation, is fast and can obtain a precise calculation result with relatively low experiment costs.

Method for calculating instantaneous sprinkler strength

A method for optimizing a rotation angle of an outlet of an atomizing nozzle is provided. The atomizing nozzle includes a nozzle core and a nozzle body. The method includes the following steps: measuring an outlet flow rate Qof the atomizing nozzle under a rated working pressure when an outlet clearance between the nozzle core and the nozzle body is &#x3b4;=0; setting the outlet clearance between the nozzle core and the nozzle body by changing a phase angle between the nozzle core and the nozzle body, and measuring an outlet flow rate Qof the atomizing nozzle in a stable working state under the rated working pressure; calculating a flow coefficient of the atomizing nozzle; calculating the outlet clearance of the atomizing nozzle according to an expected outlet flow rate Qof the atomizing nozzle and the flow coefficient of the atomizing nozzle.

Method for optimizing rotation angle of outlet of atomizing nozzle

Disclosed is a method for calculating the depth of sprayed water of a translational sprinkler in different working conditions, involving placing rain barrels () in n rows in the movement direction of a translational sprinkler (), each row having m barrels, such that the spray radius of rain droplets can completely cover the rain barrels () while ensuring that the translational sprinkler () is spraying stably; calculating the average sprinkler strength of each rain barrel (); drawing a relationship curve of the sprinkler strength and the distance from the centre; setting the movement speed s of the translational sprinkler (); establishing a function relationship between a sprinkler strength d' and time t; calculating the time tneeded for the translational sprinkler () to completely pass one of the rain barrels (); and with the condition that the movement time is t, performing mathematical integration on the sprinkler strength function to obtain the sprinkled depth of water at a certain rain barrel (). The calculation method has a simple operation, is fast and can effectively save on costs, providing a basis for optimizing the movement speed of the translational sprinkler ().

Method for calculating depth of sprayed water of translational sprinkler in different working conditions

An optimization design method for a spatial flow passage of a low-pressure even spray nozzle, relating to a design method for an essential apparatus in a water-saving irrigation system, such as a spray irrigation system. Specifically, if the model and the inlet diameter of a nozzle are determined, the shape and the size of the cross section of an outlet, a flow passage deflection angle, the radius and the arc length of a flow passage contour, and the size of an elevation angle of the outlet are determined to implement structural optimization of a spatial flow passage of the nozzle; moreover, parameterization design of the spatial flow passage in different inlet diameter conditions is implemented, so that a method for determining structural parameters of a spatial flow passage of a nozzle is obtained. A design method of a spatial flow passage under a low-pressure operation condition is developed, such that the hydraulic performance of the nozzle is optimized, and the nozzle is efficient and saves energy.

Optimization design method for spatial flow passage of low-pressure even spray nozzle

A detachable frame of a light-small sprinkling machine includes angle steel pieces, tiepieces, support bars, support upright rods, top rod with slots, and wheels. The components of the frame are connected through threaded connections, so that the frame can be disassembled and removed easily. The distance between sprinkler heads and the mounting height of the sprinkler heads may be changed by means of free movement of turning hooks in the top rod with slots. The number of spans of the rod of the machine are be selected according to the topographic structure and can be changed by means of threaded holes in the two ends of the top rod with slots, and thereby the length of the rod can be changed. Employing low-pressure sprinkler heads and utilizing the turning effect of movable swivel shafts, the irrigation sprinkling machine can be turned to any direction freely.

Detachable frame of light-small sprinkling machine for precise irrigation

An automatic control element has a sprinkler, a fluidic element connected to the sprinkler, and an outlet cover plate secured onto an outlet of the fluidic element. The fluid element further has a water inlet and a first air supply pore are symmetrically arranged on it. A second air supply pore is on the water inlet. A water distributor is formed on the sprinkler, a water tank is provided on the outer side of the sprinkler, and the water distributor is in communication with an inner cavity of the water tank. A signal nozzle is provided on the wall of the water tank, and the signal nozzle is connected to the water inlet via a conduit.

Automatic control element with uniformly-distributed stepping frequency

An injecting body of the injector is provided with two outlets. One outlet is connected to an auxiliary nozzle in a threaded manner, and the other outlet is connected to an injecting element body in a threaded manner. The water taking signal nozzle circularly takes signal water and air conveniently and reliably, so that a low-pressure vortex region is discontinuously formed at one side of the injecting element body; formation and disappearance of a pressure difference between a left cavity and a right cavity can be implemented in an automatic control manner, and wall attachment of water and rotation of the injector are implemented. The auxiliary nozzle is primarily used for supplementing near water distribution of the double-nozzle injector capable of spraying at a medium and low pressure, so as to improve spraying evenness.

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Jiangsu, China

Junping Liu