LumberJocks

Dust collector can collapses!!

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by bigfoot62 posted 875 days ago 1374 views 0 times favorited 15 replies Add to Favorites Watch
View bigfoot62's profile

bigfoot62

17 posts in 909 days


875 days ago

What kind of container can I use that will take the vacuum without falling in on itself? I’m using a new 30 gallon metal garbage can. I thought because it was metal it would be tough. However I’ve been proved wrong! The only thing I can think of doing would be to install a couple of metal rings inside to prevent the can from collapsing. I Think I can get some strap iron from a home center and form it into a couple of rings, but thats about all I can think of right now. Any ideas????

-- My best friend has always been my Labradore Retriever!


15 replies so far

View RandyM68's profile

RandyM68

693 posts in 923 days


#1 posted 875 days ago

If you don’t have enough flow coming into the collector, it will smash it. I’ve seen vacuum pumps for transferring liquids smash a 55 gallon oil drum, like a beer can when the intake hose clogged up. If your hoses won’t allow enough air flow to pass through, it will collapse the weakest part of the system. If it’s starving for air, and nothing caves in, it will probably over load the pump.

-- I can explain it to you, but I can't understand it for you. I'm sorry,thanks.

View Paul Stoops's profile

Paul Stoops

322 posts in 1166 days


#2 posted 875 days ago

Since you are using a shop vac, the static pressure is going to be relatively high. With the large surface area of the garbage can, it will be difficult to keep it from collapsing without some sort of internal or external stiffeners.

One possibility would be to fabricate some sort of adjustable pressure relief valve which will open when the static pressure (~vacuum) gets to a maximum point short of collapsing your can. This could be a spring loaded device or a weighted flapper type valve.

Another possibility would be to use a vacuum cleaner hose fitting that has a variable opening (usually a sliding panel) to reduce the amount of vacuum applied.

You might checkout the Phil Thien website—some folks have had the same problem with their systems with the Phil Thien Baffle installed and have come up with alternate solutions.

-- Paul, Auburn, WA

View BobM001's profile

BobM001

388 posts in 935 days


#3 posted 875 days ago

Try to find a place that recycles steel drums. If you’re lucky they might have a 30 gallon grease drum. They have an open top with a gasketed lid. That bead that’s rolled in the center of the side makes it just about impossible to collapse. The metal garbage cans of this day and age are made from recycled Prince Albert cans. LOL! Not like the HEAVY galvanized garbage cans of days gone by.

-- OK, who's the wise guy that shrunk the plywood?

View Sawkerf's profile

Sawkerf

1730 posts in 1673 days


#4 posted 875 days ago

Do you have any blast gates open when you’re running your DC?

-- Adversity doesn't build character...................it reveals it.

View bigfoot62's profile

bigfoot62

17 posts in 909 days


#5 posted 875 days ago

Hay thanks for all the great ideas, I’ve got some ideas now too think about, and how and what to do!
I kind of like the great suction of this vacuum as as it picks up just about everything off the floor, Ive even vacuumed up tools without knowing it. Only later finding them in the sawdust. I used to have a 1,1/2” vacuum which would clog the hose very often. I’ve noticed that when this new cyclone with the metal can, I hear larger debris hitting the inside of the can.
I’ll upgrade the vacuum to a large 4” inch machine some day, which will mean building another cyclone with a 4” inlet and outlet, but for now it’s a work in progress.

-- My best friend has always been my Labradore Retriever!

View bigfoot62's profile

bigfoot62

17 posts in 909 days


#6 posted 873 days ago

Hay Gentlemen!
I’ve solved my problem with the dust collector can. I scoured every building looking for some type meterial to use To stiffin up the middle of the 30 gal. Metal can. I finally got the idea to use a 1” short section of copper coil of left over pipe I had used to run a new water line from the water meter to the house. It was just sitting there going to waste anyway. I just formed a 5’ section into the same circumference as the middle of the can and drove it tightly down into the can. It works like a charm, and the best part I didn’t have to spend anything to fix it.

-- My best friend has always been my Labradore Retriever!

View Dusty56's profile

Dusty56

11639 posts in 2293 days


#7 posted 873 days ago

Would like to know what kind of vacuum cleaner you are using and whether or not you’re using blast gates on your machines , and if you’re opening one or more before turning the vacuum on.

-- I'm absolutely positive that I couldn't be more uncertain!

View MrRon's profile

MrRon

2731 posts in 1848 days


#8 posted 873 days ago

As long as you have a blast gate open, the drum won’t collapse.

View Dusty56's profile

Dusty56

11639 posts in 2293 days


#9 posted 873 days ago

That’s my exact thought as well , MrRon : )

-- I'm absolutely positive that I couldn't be more uncertain!

View bigfoot62's profile

bigfoot62

17 posts in 909 days


#10 posted 873 days ago

Well, the vac is a Craftsmen 20gallon 6.5hp. No I don’t have any blast gates. I thought of that but wouldn’t that decrease the negative pressure, and thereby decrease efficiency? The way I’m using this rig is to keep it stationary with a 20’ hose to reach any equipment or part of floor I need to reach. I know some guys have mounted the hole thing on rollers but I didn’t want that kind of setup. Thanks again!

-- My best friend has always been my Labradore Retriever!

View Dusty56's profile

Dusty56

11639 posts in 2293 days


#11 posted 872 days ago

I just can’t see any reason for a metal can to collapse if nothing is stopping the airflow on the intake side. My 2HP dust collector with 4” hoses can cause some damage if the hose gets blocked , but other than that , my metal cans have no problems. The blast gates are for restricting or closing off the airflow altogether as needed. Otherwise , they should be wide open on at least one machine . Are there any kinks or weak spots in your hoses ?
Your 6.5 HP is peak horsepower which would probably only come into play if there was a blockage / stoppage of intake air flow. It’s not a constant 6.5hp which I’m sure you already know : )

-- I'm absolutely positive that I couldn't be more uncertain!

View MrRon's profile

MrRon

2731 posts in 1848 days


#12 posted 872 days ago

Blast gates are there to isolate air flow to one machine at a time. They are not to be ALL closed when the DC is running.

View David Grimes's profile

David Grimes

2072 posts in 1245 days


#13 posted 872 days ago

FWIW… I use a 30 gallon poly drum with gasketed lid (from Global). It will not collapse even if I do close the gates. I did not want to be punished with bent cans whenever I accidentally close one before opening another. Who would ?

-- If you're going to stir the pot, think BIG spoon or SMALL boat paddle. David Grimes, Georgia

View Dallas's profile

Dallas

2857 posts in 1092 days


#14 posted 872 days ago

It isn’t only the big shop vacs that will collapse a 30 gallon trash can.
I have a Bucket-Max= by Shopvac.
I cut the bottom out of a bucket then made a lid out of plywood and glued the bucket into it for the trash can. If I accidentally cover the suction end of the hose the can will flatten itself completely.
I solved that problem by cutting some 3/4” ply into 4” pieces and screwing braces into the plywood so they will slide down into the can.

-- Improvise.... Adapt...... Overcome!

View bigfoot62's profile

bigfoot62

17 posts in 909 days


#15 posted 872 days ago

This dust collector doesn’t have any blast gates! The whole problem was if I held my hand over the only inlet hose as a test, it would collaspe the thin metal container can that they make today. it even krinkled it some when I would vacuum the floor to pick up saw dust. However that problem is no longer a problem anymore, since I installed the metal ring mid ways in the container. I just didn’t want the can to colaspe if it got blocked by debis every once in awhile. The small size of the 30 gallon can it good because it’s easy to empty when it gets full, and boy can I fill it up when I size the rough cut oak I’ve bought, about 600 board feet of it.

-- My best friend has always been my Labradore Retriever!

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase