The rotation principle of metal swing arm sprinkler nozzle is based on the synergistic effect of water flow impact and spring reset. The intermittent rotation of the nozzle is achieved by the periodic swing of the swing arm hitting the nozzle. The specific process is as follows:
1. Water flow impact drives the swing of the rocker arm
Initial state: When the nozzle is stationary, the deflector and deflector at the front end of the rocker arm are located directly in front of the nozzle.
Water flow impact: Pressure water is ejected from the nozzle, forming a high-speed water tongue.
. The water tongue first impacts the deflector, changes the direction of water flow, deflects it by 60 °~120 °, and then impacts the deflector.Force on rocker arm: The guide plate is subjected to the reaction force of water flow, which pushes the rocker arm to swing outward around the axis, while compressing the rocker arm spring and storing elastic potential energy.
.2. Spring reset drives rocker arm swing
External swing stage: The rocker arm continues to swing to the maximum angle (maximum opening angle), at which point the spring torque reaches its peak and the rocker arm angular velocity drops to zero.
.Swing stage: Under the action of spring torque, the rocker arm begins to swing back in the opposite direction, and the elastic potential energy gradually converts into kinetic energy, with the angular velocity continuously increasing.
.3. The rocker arm collides with the nozzle to achieve rotation
Cutting into the jet: During the swing back process, the rocker arm re enters the water tongue range at a certain angle, and the deflector plate is again impacted by the water, accelerating the movement of the rocker arm.
.Impact stage: The rocker arm, under the combined action of inertial force and tangential additional force of the deflector, impacts the nozzle at a high angular velocity, causing the nozzle to rotate 3 °~5 °.
.Periodic cycle: After the nozzle is stationary, the water flow impacts the deflector again, repeating the above process to form intermittent rotation.
.4. Implementation of fan-shaped spraying (optional function)
Reversing mechanism: If the nozzle needs to achieve fan-shaped spraying, a limit device and reversing mechanism need to be installed.
.Reversing principle: When the nozzle rotates to the set angle, the limiter triggers the reversing mechanism, which pushes and pulls the reversing arm through the transmission rod to enter or leave the jet, forcing the nozzle to rotate in the opposite direction and form a fan-shaped spraying area.
.Key design features
Wear reducing sealing ring: prevents sand particles from entering and extends service life.
. Wear resistant sealing gasket: such as H-shaped sealing gasket, reduces friction loss. Spring protection cover: protects the spring from external contamination.Parameter range:
Working pressure: 150-350kPa.
. Flow rate: 0.43-8.00m ³/h.Range: 9.5-22m.
Principle advantages
Uniform spraying: Intermittent rotation makes the single rotation angle small (3 °~5 °), and the rotation period short (0.2~2.0 seconds), ensuring uniform spraying.
. Strong adaptability: By adjusting the position of the limit pin, the nozzle rotation angle can be controlled, and the watering range can be flexibly adjusted.Reliable structure: The synergistic effect of the rocker arm and spring ensures stable nozzle speed, long range, and high uniformity.
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