Emitter for drip irrigation

Abstract

The invention discloses an emitter for drip irrigation. The emitter comprises a casing, a piston glidingly connected in the casing as well as a rear cover, wherein the piston comprises a first pistonpart, a second piston part and a connecting rod part connected between the first piston part and the second piston part, the area of the outer end of the first piston part is S1, the area of the outerend of the second piston part is S2, and S1 is smaller than S2; a first piston cavity matched with the appearance of the first piston part is formed in the casing, a second piston cavity matched withthe appearance of the second piston part is formed in the casing, a channel for communicating the left end of the first piston cavity and the right end of the second piston cavity is formed in the casing, a plurality of dripping ports penetrating the casing are formed in the side wall of the first piston cavity in the moving direction of the first piston cavity at equal intervals, and a spring for driving the first piston part to move to the right side of the first piston cavity to open the dripping ports is arranged on the casing. According to the emitter, flow of water dripping from the emitter can always keep relatively constant no matter how pressure of inside water changes.

Description

【Technical field】 [0001] The invention relates to the field of agricultural irrigation, in particular to a dripper for drip irrigation. 【Background technique】 [0002] Drip irrigation is one of the most effective water-saving irrigation methods. Compared with sprinkler irrigation, drip irrigation has a higher effect of saving water and increasing production. At the same time, it can be combined with fertilization to improve fertilizer efficiency. It is suitable for irrigation of fruit trees, vegetables, commercial crops and greenhouses, and can also be used for irrigation of field crops in places where water is scarce. Its disadvantage is that the dripper is easy to scale and block, so the water source should be strictly filtered. [0003] Existing drip irrigation drippers cannot adjust the dripping speed according to the water pressure in the pipe. When the water pressure in the pipe is high, the dripping speed is fast, which is easy to cause waste of water or fertilizer. ...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the dripper is easy to scale and block, so the water source should be strictly filtered

[0003] Existing drip irrigation drippers cannot adjust the dripping speed according to the water pressure in the pipe. When the water pressure in the pipe is high, the dripping speed is fast, which is easy to cause waste of water or fertilizer. When the water pressure in the pipe is low, the water drips out quickly. slow, can't even drip

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