An Automatic Siphon?
I installed an "automatic" siphon spillway tube in my pond. When it rains, the siphon draws the water back down to the proper level.
How does an "automatic siphon" get started?
Labels: outside-the-box
posted by Ragknot at
7:12 PM
17 Comments:
Ah yes... well I guess I will take this one too. This is pretty easy actually. You need:
A siphon tube
A horizontal level switch
A plc with 1 digital input, 1 digital output
A solenoid valve (or a solenoid valve controlling a larger valve depending on the size of your pond and how much rain you get at one time)
Some control pair wiring (20 ft. or whatever)
A power source
A sign post (or other mounting mechanism)
AND maybe a tee on your siphon tube with a manual valve for the inital fill of the tube.
Mount the level switch to your desired control level. Run your wiring and tubing as appropriate. Perform the inital fill of your tube, and power-up the PLC.
I hope everyone sees how this would work. I think it could be done for less than $500 depending on the scale of the application and the logistics of the pond.
Jesse
Even easier... you don't really need the PLC (although I'd prefer it because it's 24 V vs. 120 V and I am scared of electricity..lol). Also, you would need a power supply for the PLC, which I forgot, but I digress. Oops, I meant discrete I/O, not digital I/O.
You could actually just purchase a normally open level switch, and run it in series with the solenoid. Switch closes at desired level, powers up solenoid, opens valve, starts siphon. Remember, there is a deadband in the switch, so it is unlikely that it would be turning on/off constantly. Plus, a siphon tube is being used to control level in a POND (scale is important in this case). I'm not quite sure how this would be wired safely with 120 V....there are probably some protective measures needed.
Still, I prefer the PLC, and a beefier one at that. This way, you could add more inputs/outputs if desired, maybe even some analog stuff (pH monitoring, turbidity, ect.). This could drive pond chemistry control among other things.
Jesse
OK... It is late and I have to get up early, so I apologize. I just realized that you need one more thing:
A check valve at the suction end of the siphon tube.
OK.. now you are done.
Jesse
OK... one more post to whoever authored this question. Why the hell would you use a siphon tube for this application ??? lol
A wier would be much better.
Jesse
Oh ya and bye the way,
I'm a faggot
Jesse
jesus christ stop saying jesse
jesse
No ones close yet. There are no electric parts, no switches, no valves.
Just a 12 inch tube with a cage over the intake to stop trash.
you have a bucket next to the pond. The top of the bucket is the at the same level you want the pond to stay at.
Fill the tube with water and place one end near the bottom of the pond and the other near the bottom of the bucket.
The water level between the pond and the bucket will now equalize. Since the pond and bucket stays full (or mostly full depending on evaporation rate), then the siphon never breaks down. it just stays in equilibrium. When it rains and the water level in the pond begins to rise, it will automatically equilize with the bucket, which cannot get any fuller, it'll just overflow. Pond stays at same level, forever..
unless there is a sever drought and both dry up completely.
To Euclid's Brother,
That sounds like it might work on a small scale, but it might fail, like you said when the vacuum breaks. It sounds like your thinking of a small tube. The tube is 12 inches in diameter.
This automatic syphon does not depend on maintaining a vacuum thur periods of unuse.
Think out of the box. Maybe numbers will help. Say I want to keep a water level of 90 feet, but I want it syphon if the level gets to 95, and syphon back to 90.
The outlet is behind the dam at elevation of 85 feet at the bottom of the channel. The top of the dam is 100 feet.
Ragkot... My way works with a 30" line or a 1/2" line. Maybe you should think outside of the box.
Jesse
Jesse
Jesse
Jesse
Jesse
Jesse
lol
You guys are ridiculous. All you need is something to keep the tube in place in a fixed position, and have the tube run out of the pond and down the side. As long as the end of the tube is lower than the desired water level, the tube will siphon all extra water out. Gravity and properties of water ftw :)
im going to have to agree with you jesse, You are a faggot
Find Picture of Solution here...
http://4.bp.blogspot.com/_gQkeSWqb63Q/SmaHdhE9NzI/AAAAAAAAAFI/JfVfLyptVek/s1600-h/syphon.JPG
This highly effective application used where there's high rainfall and a small drainage area. The pipe sizes generally vary from a 6 to 24 inches.
Was the picture clear?
Did it show the answer clearly?
What questions are unresolved?
Aww, I did not think of that.
Great trick of mind.
the way it works is their is a tube on the water level needed and any access water will drain don the tube in a lower elevation
jesse
The way it works in this...
If the water reach Elev 95, it begins to flow, but not a syphon yet.
If the water reaches about Elev 95.5 a syphon begins, and removes water back to elev 90.
If it does not reach the syphon elev, the water will drain to 95 by free flow.
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