Injection nozzle for sprinkling irrigation and fertilization of circular sprinkling irrigation machine

Abstract

The invention relates to an injection nozzle for sprinkling irrigation and fertilization of a circular sprinkling irrigation machine, which is characterized by comprising a strip-shaped nozzle body; a contraction type flow passage which is gradually narrowed down is formed inside the nozzle body; one wider end of the flow passage of the nozzle body is connected with a nozzle cap, the other end of the nozzle body is inserted into a water inlet pipe of the circular sprinkling irrigation machine, and a nozzle head is integrally arranged at the end part of the nozzle body; a nozzle flow passage communicated with the contraction type flow passage is formed inside the nozzle head, and the other end of the nozzle head is connected with a blockage; a blocking plug and a spring are arranged in the nozzle head flow passage; a plurality of nozzle outlets are formed in the circumferential direction of the nozzle head; one end of the nozzle cap is connected with the nozzle body, and an exhaust device is arranged at the other end of the nozzle cap; and an inside flow passage is formed in the nozzle cap and is communicated with the contraction type flow passage in the nozzle body, a fertilizer inlet pipeline is vertically arranged on the outer wall of the nozzle cap, one end of the fertilizer inlet pipeline is communicated with the inside flow passage of the nozzle cap, and the other end of the fertilizer inlet pipeline is connected with a water outlet pipeline of a fertilizer liquid pressing device. The injection nozzle has good mechanical performance and hydraulic performance, has the function of preventing the backflow of water and is suitable for the sprinkling irrigation and the fertilization of the circular sprinkling irrigation machine.

Description

technical field [0001] The invention relates to an injection nozzle, in particular to an injection nozzle used for irrigation and fertilization of a circular sprinkler irrigation machine, and belongs to the technical field of modern agricultural water saving. Background technique [0002] Fertigation is an important feature of modern intensive irrigated agriculture. The use of circular sprinklers to spray and fertilize crops can precisely control the irrigation time, fertilization amount, fertilizer concentration and the ratio of nutrient elements, improve the utilization rate of water and fertilizer, and minimize environmental pollution. According to incomplete statistics, as of the end of 2011, there were more than 7,000 sets of circular sprinkler irrigation machines nationwide, and the irrigated area was about 3.5 million mu. According to the "National Water-Saving Irrigation Twelfth Five-Year Plan", the area of ​​high-efficiency water-saving agricultural irrigation in t...

AI Technical Summary

Problems solved by technology

At present, there are a few round sprinkler irrigation machines in China that realize sprinkler irrigation and fertilization. The injection nozzle is replaced by a 1 / 2-inch or 3 / 4-inch pipe, which is directly inserted into the main water pipe of the round sprinkler irrigation machine. There is no anti-backflow structure, and the fertilizer liquid The mixing effect with irrigation water is poor; and some similar injection nozzles used in petroleum, pharmaceutical and other fields have more specific shapes and installation methods

Generally speaking, most injection nozzles are not designed for fertilization of circular sprinklers, and the shape, installation method, internal flow channel, stopper type, inlet and outlet structure, etc. of injection nozzles currently used for circular sprinklers are not suitable. High-efficiency sprinkler irrigation and fertilization operations for circular sprinklers

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