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  1. #31

    May 2012
    899
    511 times
    All Types Of Treasure Hunting
    Quote Originally Posted by Goodyguy View Post
    Are you sure you are not over thinking this?
    I'm quite positive we're over thinking this...
    Fullpan likes this.

  2. #32
    us
    Oct 2012
    Palmdale , CA
    Goldbug 2
    27
    26 times
    Prospecting
    Hi , I have made a vacuum drywasher see topic called "vacuum drywasher combo"
    here is a still pic.

    Click image for larger version. 

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    dsrtdwg1 likes this.

  3. #33
    us
    Oct 2017
    The Land Between Two Rivers
    29
    17 times
    Prospecting
    Quote Originally Posted by Goodyguy View Post
    Are you sure you are not over thinking this?

    Seems to me that if you want to dredge dry dirt into a drywasher just run the output end of the suction hose into the hopper of the drywasher. No need for trap doors. The hopper already has a flow regulator. Why couldn't you use the same suction nozzle and hose that is used on a "wet" system and just substitute air into the nozzle jet instead of water? Forced air should create a vacuum powerful enough to suction dirt and gravel through the hose and into the drywasher hopper just like water does. You will also need to add a cover over the hopper to keep the blowing dust contained.

    Of course you still run your drywasher blower as a separate unit like you normally do.

    GG~
    I noticed a few days ago that this thread had been revived by a very good design. Then read thru it all.
    NO, the OP was not over thinking this. Things in air do not behave the same as in water.
    There is no magic wand to make air flow thru a pipe without a fan blade of some type in the circuit.
    The discharge end of an air hose has to have gone thru the pump. I've never heard of a trash air pump.
    A cyclone separator is the only way I know of to easily drop out most of the solids, fine dust will still go thru the blower and eventually wear the blades.
    Objects suspended in water are not as heavy as in air so move easier.
    Air is compressible, water is not, so when the back pressure increases enough the air stops moving if you are trying to push it.
    Water has mass, air not so much. With that mass it can gain momentum, air not so much.
    Take an air gun at 100psi and see how far away someone can feel it. Use the same nozzle with water at 100psi and see how much further it will reach.
    I hope they have a sense of humor because if they start where they still felt the air, they'll be totally soaked before they can get far enough away.
    Don't believe me, come on by and I'll demonstrate it on you.
    Alternating counterbalanced trap doors most likely would be easier than a star valve.
    A cover over the drywasher hopper tight enough to contain the blowing dust would most likely stop the whole works.

    All these great videos have me thinking up my own designs. Love it.


    if it's not gold that glitters in your pan, may it be diamonds.
    Goodyguy likes this.

  4. #34
    us
    Sep 2016
    Southern Arizona
    Minelab Equinox 800,XP ORX
    127
    94 times
    All Types Of Treasure Hunting
    It looks like you have a good design,but a few flaws, probably the same as why the easy pickings failed. The dirt here in Arizona is hard like concrete, you still need a pick and shovel. You have a lot of weight to carry up and down steep washes,just to clear out 5-6 feet of overburden, and your box is small, you may very well loose 50% of any fold you find.
    Goodyguy likes this.

  5. #35
    Dry washing / metal detecting

    Sep 2013
    Las Vegas
    Whites and cheep bounty hunter
    363
    231 times
    Prospecting
    Quote Originally Posted by Goodyguy View Post
    Are you sure you are not over thinking this?

    Seems to me that if you want to dredge dry dirt into a drywasher just run the output end of the suction hose into the hopper of the drywasher. No need for trap doors. The hopper already has a flow regulator. Why couldn't you use the same suction nozzle and hose that is used on a "wet" system and just substitute air into the nozzle jet instead of water? Forced air should create a vacuum powerful enough to suction dirt and gravel through the hose and into the drywasher hopper just like water does. You will also need to add a cover over the hopper to keep the blowing dust contained.

    Of course you still run your drywasher blower as a separate unit like you normally do.

    GG~
    Buddy , your mail box is full .

 

 
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