Impulse sprinkler
Impulse sprinklers are used to irrigate large areas and are used in agriculture and gardening and landscape maintenance. You can often see them on sports, golf or tennis courts. The design is mostly made of die - cast aluminum , simple sprinklers are also made of plastic .
In the professional sector, the sprinklers are usually placed on tripods , in the garden area they are often stuck into the ground with a simple ground spike. Impulse sprinklers work with only one nozzle and therefore have a long range. The surface irrigation is done by smashing the water jet with a jet splitter. In addition, a width limiting plate can often be swiveled into the beam. Some high-quality designs have interchangeable nozzles or flow adjusters.
functionality
The beam separator is located in the beam as a wedge-shaped lever and is deflected to the side by this against a spring. The spring tension ensures that the lever swings back again. The stroke of the lever can often be changed by an adjusting screw. Due to the special flow geometry, the sprinkler is rotated through a certain angle with each stroke of the jet separator. The jet separator ensures that the sprinkler jet is splintered and thus the water jet is distributed over the area to be irrigated, which is more or less even depending on the setting of the lever stroke.
If you only want to irrigate a sector and not a full circle, a sector limiter can be swiveled in. This can be set to the sector to be irrigated with two mostly continuously adjustable sector stops. If the sector limiter hits a stop, the flow to the jet separator is switched over, so that the sprinkler turns back in the opposite direction. The forward rotation is usually slow and the reverse rotation is fast. This leads to a characteristic sound.
When using the sector limiter, the jet flow must be switched by the stroke of the jet separator. If the water pressure is too low, the stroke is set too small or the switching force of the locking device is too high, it can easily happen that no switching takes place at the stop. The sprinkler is then stuck in one position and cannot do its job of even watering.
Invention and Impact
The first impulse sprinkler was developed by Orton H. Englehart of Glendora, California , and a patent applied for in the United States in 1933 , which was granted in April 1935. Englehart sold the rights to his patent to Clement and Mary LaFetra, who began producing the Rain Bird in their barn on October 13, 1935 . The impulse sprinkler had a positive influence on the development of agricultural productivity. The invention was therefore recognized in 1990 by the American Society of Agriculture Engineers as a major historical event .
advantages
- Long range, as the water pressure is not distributed over several nozzles
- Stepless width and sector adjustment
disadvantage
- Relatively loud work noise
- Complicated setting
- Dependence on water pressure
- Often uneven distribution of irrigation
Web links
- The company Rain Bird Website (English)
Individual evidence
- ↑ U.S. Patent # 1,997,901: Water Sprinkler. ( Memento of the original from January 22, 2017 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ W. Rogers: The Professional Practice of Landscape Architecture. John Wiley & Sons, 2010, ISBN 0-470-27836-6 , pp. 226-234. limited preview in Google Book search
- ^ American Society of Agricultural and Biological Engineers: Rain Bird Impact Drive Sprinkler Head - 1990. Retrieved June 16, 2019.
