Solenoid valve for irrigation system

A solenoid valve for irrigation system comprising a gardening tube, a rubber valve piece, a cover, and a valve column;

• wherein the gardening tube has a water inlet channel and a water outlet channel which are communicated with each other, and a valve tube vertically extending from the gardening tube comprises an opening, and a connecting annular groove is formed at an edge of the opening of the valve tube, and a vertical first connecting tube is formed inside the valve tube;
• the water inlet channel and the water outlet channel are respectively communicated with an outside and an inside of the first connecting tube, and the water inlet channel and the water outlet channel are communicated through the valve tube;
• a first annular groove is formed on an inner wall of the valve tube;
• wherein the valve piece coupled with the valve tube through the first annular groove is movable in the valve tube to abut against the first connecting tube;
• wherein the cover comprises an annular first protruding edge and an annular second protruding edge which respectively protrude from a lower surface of the cover, and the second protruding edge is located farther from the center of the cover than the first protruding edge;
• the cover is coupled on the valve tube so as to enable the second protruding edge downwardly abut against an outer periphery of the valve piece;
• the first protruding edge coupled in the connecting annular groove is secured with the connecting annular groove through high-frequency adhesive process to form sealing;
• the cover comprises a second connecting tube vertically protruding from the cover, and the second connecting tube has a valve chamber formed at a first end thereof which is communicated with the valve tube;
• a housing formed at a second end of the second connecting tube is adapted to accommodate a magnetic member, and a cap is configured to couple with the second end of the second connecting tube to block an opening of the housing;
• a solenoid coil is disposed on an outer periphery of the second connecting tube;
• and
• wherein the valve column arranged in the valve chamber of the second connecting tube has a tapered end faced to the valve piece;
• the solenoid coil is energized to generate a magnetic field in one direction or in an opposed direction so as to move the valve column downwardly or upwardly in the valve chamber such that the tapered end of the valve column is configured to abut against the valve piece to block water or to move away from the valve piece to enable water to pass through the first connecting tube.