bell-siphon.scad

$fa = 1;
$fs = 1;

bell_height = 50;
bell_diameter = 10;
bell_wall = 1.2;
bell_foot_height = 10;
bell_foot_gap = 5;

snorkel_height = bell_height - 20;
snorkel_diameter = 5;
snorkel_wall = 1.2;

module tube(height, inner_diameter, outer_diameter) {
    difference() {
        cylinder(height, outer_diameter, outer_diameter, true);
        cylinder(height + 2, inner_diameter, inner_diameter, true);
    }
}

module bell() {
    union(){
        translate([0,0,(bell_height / 2) - (bell_wall / 2)])
        cylinder(bell_wall, bell_diameter + bell_wall, bell_diameter + bell_wall, true);

        tube(bell_height, bell_diameter, bell_diameter + bell_wall);
    }
}

module snorkel() {
    translate([bell_diameter,0,(bell_height / 2) - (snorkel_height / 2)])
    union(){
        translate([0,0,(snorkel_height / 2) - (snorkel_wall / 2)])
        cylinder(snorkel_wall, snorkel_diameter + snorkel_wall, snorkel_diameter + snorkel_wall, true);
        
        tube(snorkel_height, snorkel_diameter, snorkel_diameter + snorkel_wall);
    }
}

module snorkel_connector() {
    translate([bell_diameter,0,(bell_height/2)-snorkel_diameter-bell_wall])
    rotate([0,90,0])
    cylinder(bell_wall*2,snorkel_diameter,snorkel_diameter, true);
}

module bell_foot(){
    translate([0,0,-(bell_height/2)])
    translate([0,0,0.5])
    difference(){
        tube(bell_foot_height, bell_diameter - 1, bell_diameter + bell_wall + 1);
        
        cube([(bell_diameter*2)+(bell_wall*2)+2, bell_foot_gap, bell_foot_height+1], true);
        
        rotate([0,0,45*1])
        cube([(bell_diameter*2)+(bell_wall*2)+2, bell_foot_gap, bell_foot_height+1], true);
        
        rotate([0,0,45*2])
        cube([(bell_diameter*2)+(bell_wall*2)+2, bell_foot_gap, bell_foot_height+1], true);
        
        rotate([0,0,45*3])
        cube([(bell_diameter*2)+(bell_wall*2)+2, bell_foot_gap, bell_foot_height+1], true);
    }
}

rotate([180,0,0])
union(){
    difference() {
        bell();
        snorkel_connector();
        bell_foot();
    }
        
    difference() {
        snorkel();
        cylinder(bell_height, bell_diameter, bell_diameter, true);
    }
}