Pulsation variable precision point water injection mechanism

Abstract

The invention discloses a pulsating variable precision hole water injection mechanism, and belongs to agricultural machines. A first transmission shaft is fixedly provided with a second driving chain wheel, a second transmission shaft is fixedly provided with a cam and a second driven chain wheel, and a second transmission chain is arranged on the second driving chain wheel and the second driven chain wheel in sleeving and matched modes. The transmission ratio of the second driving chain wheel to the second driven chain wheel is 1 to N, and the N is the number of water injection pipes on a hole injection water wheel assembly. A water pump and a pressure control valve or a throttling valve are assembled on a water pipe, and the two ends of an elastic telescopic control rod are in contact fit with the cam and the pressure control valve or the throttling valve respectively. A variable cross-section notch is formed in the lower side wall portion of an inner pipe of the hole injection water wheel assembly, and the sector angle of the variable cross-section notch is larger than or equal to 360 degrees / N. The pulsating water injection control structure is adopted, and thus the pulsating variable precision hole water injection mechanism has the advantages of being novel and reasonable in structure, accurate in water injection, good in water injection quality and reliable to use.

Description

technical field [0001] The invention belongs to agricultural machinery, and mainly relates to a pulsating variable precision hole water injection mechanism for pot seedling transplanting in dry fields. Background technique [0002] At present, furrow irrigation is mainly used for field transplanting in my country. This irrigation method has a large amount of water and low water utilization rate, resulting in waste of water resources. In order to save water for farmland irrigation, an external cavity rotary water injection device was successfully developed, which is mainly used for watering when seeds are sown. During operation, the inner cavity of the mechanism is fixed, and the outer cavity rotates. When the outer cavity rotates to the water outlet below the inner cavity, the water injection pipe on the outer cavity is aligned with the hole to inject water. When the outer cavity turns to the water outlet under the inner cavity, Stop filling. The mechanism can improve irri...

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Problems solved by technology

But the problem is that this mechanism can only achieve fixed-point water injection, and cannot guarantee that when the outer cavity rotates, there are two water injection pipes that are always aligned with the front and rear holes for water injection, and because the pressure or flow of water at the outlet cannot be controlled, the holes will Both sides of the hole are easy to collapse, and the amount of water poured into the hole cannot be guaranteed

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